Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

152 files changed, 50938 insertions, 0 deletions

diff --git a/desktop/source/app/app.cxx b/desktop/source/app/app.cxx
new file mode 100644
index 000000000..b205d5b18
--- /dev/null
+++ b/desktop/source/app/app.cxx
@@ -0,0 +1,2588 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <memory>
+#include <config_features.h>
+#include <config_feature_desktop.h>
+#include <config_feature_opencl.h>
+#include <config_java.h>
+#include <config_folders.h>
+#include <config_extensions.h>
+#include <config_wasm_strip.h>
+
+#include <sal/config.h>
+
+#include <cstdlib>
+#include <iostream>
+#include <string_view>
+
+#include <app.hxx>
+#include <dp_shared.hxx>
+#include <strings.hrc>
+#include "cmdlineargs.hxx"
+#include <lockfile.hxx>
+#include "userinstall.hxx"
+#include "desktopcontext.hxx"
+#include <migration.hxx>
+#include "officeipcthread.hxx"
+#if HAVE_FEATURE_UPDATE_MAR
+#include "updater.hxx"
+#endif
+
+#include <framework/desktop.hxx>
+#include <i18nlangtag/languagetag.hxx>
+#include <o3tl/char16_t2wchar_t.hxx>
+#include <svl/ctloptions.hxx>
+#include <svtools/javacontext.hxx>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/frame/theAutoRecovery.hpp>
+#include <com/sun/star/frame/theGlobalEventBroadcaster.hpp>
+#include <com/sun/star/frame/SessionListener.hpp>
+#include <com/sun/star/frame/XSynchronousDispatch.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/util/XFlushable.hpp>
+#include <com/sun/star/system/SystemShellExecuteFlags.hpp>
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/frame/StartModule.hpp>
+#include <com/sun/star/view/XPrintable.hpp>
+#include <com/sun/star/awt/XTopWindow.hpp>
+#include <com/sun/star/util/URLTransformer.hpp>
+#include <com/sun/star/util/XURLTransformer.hpp>
+#include <com/sun/star/lang/ServiceNotRegisteredException.hpp>
+#include <com/sun/star/configuration/MissingBootstrapFileException.hpp>
+#include <com/sun/star/configuration/InvalidBootstrapFileException.hpp>
+#include <com/sun/star/configuration/InstallationIncompleteException.hpp>
+#include <com/sun/star/configuration/backend/BackendSetupException.hpp>
+#include <com/sun/star/configuration/backend/BackendAccessException.hpp>
+#include <com/sun/star/task/theJobExecutor.hpp>
+#include <com/sun/star/task/OfficeRestartManager.hpp>
+#include <com/sun/star/task/XRestartManager.hpp>
+#include <com/sun/star/document/XDocumentEventListener.hpp>
+#include <com/sun/star/office/Quickstart.hpp>
+#include <com/sun/star/system/XSystemShellExecute.hpp>
+#include <com/sun/star/system/SystemShellExecute.hpp>
+#include <com/sun/star/loader/XImplementationLoader.hpp>
+
+#include <desktop/exithelper.h>
+#include <sal/log.hxx>
+#include <toolkit/helper/vclunohelper.hxx>
+#include <comphelper/configuration.hxx>
+#include <comphelper/fileurl.hxx>
+#include <comphelper/threadpool.hxx>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/backupfilehelper.hxx>
+#include <uno/current_context.hxx>
+#include <unotools/bootstrap.hxx>
+#include <unotools/configmgr.hxx>
+#include <unotools/moduleoptions.hxx>
+#include <unotools/localfilehelper.hxx>
+#include <unotools/ucbhelper.hxx>
+#include <officecfg/Office/Common.hxx>
+#include <officecfg/Office/Recovery.hxx>
+#include <officecfg/Office/Update.hxx>
+#include <officecfg/Setup.hxx>
+#include <osl/file.hxx>
+#include <osl/process.h>
+#include <rtl/byteseq.hxx>
+#include <unotools/pathoptions.hxx>
+#if !ENABLE_WASM_STRIP_PINGUSER
+#include <unotools/VersionConfig.hxx>
+#endif
+#include <rtl/bootstrap.hxx>
+#include <vcl/test/GraphicsRenderTests.hxx>
+#include <vcl/help.hxx>
+#include <vcl/weld.hxx>
+#include <vcl/settings.hxx>
+#include <sfx2/flatpak.hxx>
+#include <sfx2/sfxsids.hrc>
+#include <sfx2/app.hxx>
+#include <sfx2/safemode.hxx>
+#include <svl/itemset.hxx>
+#include <svl/eitem.hxx>
+#include <basic/sbstar.hxx>
+#include <desktop/crashreport.hxx>
+#include <tools/urlobj.hxx>
+#include <tools/diagnose_ex.h>
+#include <svtools/fontsubstconfig.hxx>
+#include <svtools/accessibilityoptions.hxx>
+#include <svtools/apearcfg.hxx>
+#include <vcl/graphicfilter.hxx>
+#include <vcl/window.hxx>
+#include "langselect.hxx"
+#include <salhelper/thread.hxx>
+
+#if defined MACOSX
+#include <errno.h>
+#include <sys/wait.h>
+#endif
+
+#ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <vcl/fileregistration.hxx>
+#endif
+
+#if defined(_WIN32)
+#include <process.h>
+#define GETPID _getpid
+#else
+#include <unistd.h>
+#define GETPID getpid
+#endif
+
+#include <strings.hxx>
+
+using namespace ::com::sun::star::awt;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::util;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::beans;
+using namespace ::com::sun::star::frame;
+using namespace ::com::sun::star::document;
+using namespace ::com::sun::star::view;
+using namespace ::com::sun::star::task;
+using namespace ::com::sun::star::system;
+using namespace ::com::sun::star::ui;
+using namespace ::com::sun::star::ui::dialogs;
+using namespace ::com::sun::star::container;
+
+namespace desktop
+{
+
+static oslSignalHandler pSignalHandler = nullptr;
+
+namespace {
+
+#if HAVE_FEATURE_EXTENSIONS
+
+// Remove any existing UserInstallation's extensions cache data remaining from
+// old installations.  This addresses at least two problems:
+//
+// For one, apparently due to the old share/prereg/bundled mechanism (disabled
+// since 5c47e5f63a79a9e72ec4a100786b1bbf65137ed4 "fdo#51252 Disable copying
+// share/prereg/bundled to avoid startup crashes"), the user/extensions/bundled
+// cache could contain corrupted information (like a UNO component registered
+// twice, which got changed from active to passive registration in one LO
+// version, but the version of the corresponding bundled extension only
+// incremented in a later LO version).
+//
+// For another, UserInstallations have been seen in the wild where no extensions
+// were installed per-user (any longer), but user/uno_packages/cache/registry/
+// com.sun.star.comp.deployment.component.PackageRegistryBackend/*.rdb files
+// contained data nevertheless.
+//
+// When a LO upgrade is detected (i.e., no user/extensions/buildid or one
+// containing an old build ID), then user/extensions and
+// user/uno_packages/cache/registry/
+// com.sun.star.comp.deployment.component.PackageRegistryBackend/unorc are
+// removed.  That should prevent any problems starting the service manager due
+// to old junk.  Later on in Desktop::SynchronizeExtensionRepositories, the
+// removed cache data is recreated.
+//
+// Multiple instances of soffice.bin can execute this code in parallel for a
+// single UserInstallation, as it is called before RequestHandler is set up.
+// Therefore, any errors here only lead to SAL_WARNs.
+//
+// At least in theory, this function could be removed again once no
+// UserInstallation can be poisoned by old junk any more.
+bool cleanExtensionCache() {
+    OUString buildId(
+        "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version") ":buildid}");
+    rtl::Bootstrap::expandMacros(buildId); //TODO: detect failure
+    OUString extDir(
+        "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("bootstrap")
+        ":UserInstallation}/user/extensions");
+    rtl::Bootstrap::expandMacros(extDir); //TODO: detect failure
+    OUString buildIdFile(extDir + "/buildid");
+    osl::File fr(buildIdFile);
+    osl::FileBase::RC rc = fr.open(osl_File_OpenFlag_Read);
+    switch (rc) {
+    case osl::FileBase::E_None:
+        {
+            rtl::ByteSequence s1;
+            rc = fr.readLine(s1);
+            osl::FileBase::RC rc2 = fr.close();
+            SAL_WARN_IF(
+                rc2 != osl::FileBase::E_None, "desktop.app",
+                "cannot close " << fr.getURL() << " after reading: " << +rc2);
+            // readLine returns E_AGAIN for a zero-size file:
+            if (rc != osl::FileBase::E_None && rc != osl::FileBase::E_AGAIN) {
+                SAL_WARN( "desktop.app", "cannot read from " << fr.getURL() << ": " << +rc);
+                break;
+            }
+            OUString s2(
+                reinterpret_cast< char const * >(s1.getConstArray()),
+                s1.getLength(), RTL_TEXTENCODING_ISO_8859_1);
+                // using ISO 8859-1 avoids any and all conversion errors; the
+                // content should only be a subset of ASCII, anyway
+            if (s2 == buildId) {
+                return false;
+            }
+            break;
+        }
+    case osl::FileBase::E_NOENT:
+        break;
+    default:
+        SAL_WARN( "desktop.app", "cannot open " << fr.getURL() << " for reading: " << +rc);
+        break;
+    }
+    utl::removeTree(extDir);
+    OUString userRcFile(
+        "$UNO_USER_PACKAGES_CACHE/registry/"
+        "com.sun.star.comp.deployment.component.PackageRegistryBackend/unorc");
+    rtl::Bootstrap::expandMacros(userRcFile); //TODO: detect failure
+    rc = osl::File::remove(userRcFile);
+    SAL_WARN_IF(
+        rc != osl::FileBase::E_None && rc != osl::FileBase::E_NOENT, "desktop.app",
+        "cannot remove file " << userRcFile << ": " << +rc);
+    rc = osl::Directory::createPath(extDir);
+    SAL_WARN_IF(
+        rc != osl::FileBase::E_None && rc != osl::FileBase::E_EXIST, "desktop.app",
+        "cannot create path " << extDir << ": " << +rc);
+    osl::File fw(buildIdFile);
+    rc = fw.open(osl_File_OpenFlag_Write | osl_File_OpenFlag_Create);
+    if (rc != osl::FileBase::E_None) {
+        SAL_WARN( "desktop.app", "cannot open " << fw.getURL() << " for writing: " << +rc);
+        return true;
+    }
+    OString buf(OUStringToOString(buildId, RTL_TEXTENCODING_UTF8));
+        // using UTF-8 avoids almost all conversion errors (and buildid
+        // containing single surrogate halves should never happen, anyway); the
+        // content should only be a subset of ASCII, anyway
+    sal_uInt64 n = 0;
+    rc = fw.write(buf.getStr(), buf.getLength(), n);
+    SAL_WARN_IF(
+        (rc != osl::FileBase::E_None
+         || n != static_cast< sal_uInt32 >(buf.getLength())),
+        "desktop.app",
+        "cannot write to " << fw.getURL() << ": " << +rc << ", " << n);
+    rc = fw.close();
+    SAL_WARN_IF(
+        rc != osl::FileBase::E_None, "desktop.app",
+        "cannot close " << fw.getURL() << " after writing: " << +rc);
+    return true;
+}
+
+#endif
+
+bool shouldLaunchQuickstart()
+{
+    bool bQuickstart = Desktop::GetCommandLineArgs().IsQuickstart();
+    if (!bQuickstart)
+    {
+        SfxItemSetFixed<SID_ATTR_QUICKLAUNCHER, SID_ATTR_QUICKLAUNCHER> aQLSet(SfxGetpApp()->GetPool());
+        SfxApplication::GetOptions(aQLSet);
+        const SfxBoolItem* pLauncherItem = aQLSet.GetItemIfSet(SID_ATTR_QUICKLAUNCHER, false);
+        if (pLauncherItem)
+            bQuickstart = pLauncherItem->GetValue();
+    }
+    return bQuickstart;
+}
+
+void SetRestartState() {
+    try {
+        std::shared_ptr< comphelper::ConfigurationChanges > batch(
+            comphelper::ConfigurationChanges::create());
+        officecfg::Setup::Office::OfficeRestartInProgress::set(true, batch);
+        batch->commit();
+    } catch (css::uno::Exception) {
+        TOOLS_WARN_EXCEPTION("desktop.app", "ignoring");
+    }
+}
+
+void DoRestartActionsIfNecessary(bool quickstart) {
+    if (!quickstart)
+        return;
+
+    try {
+        if (officecfg::Setup::Office::OfficeRestartInProgress::get()) {
+            std::shared_ptr< comphelper::ConfigurationChanges > batch(
+                comphelper::ConfigurationChanges::create());
+            officecfg::Setup::Office::OfficeRestartInProgress::set(
+                false, batch);
+            batch->commit();
+            css::office::Quickstart::createStart(
+                comphelper::getProcessComponentContext(),
+                shouldLaunchQuickstart());
+        }
+    } catch (css::uno::Exception &) {
+        TOOLS_WARN_EXCEPTION("desktop.app", "ignoring");
+    }
+}
+
+void RemoveIconCacheDirectory()
+{
+    // See getIconCacheUrl in vcl/source/image/ImplImageTree.cxx
+    OUString sUrl = "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER
+        "/" SAL_CONFIGFILE("bootstrap") ":UserInstallation}/cache";
+    rtl::Bootstrap::expandMacros(sUrl);
+    utl::UCBContentHelper::Kill(sUrl);
+}
+
+}
+
+namespace {
+
+void runGraphicsRenderTests()
+{
+#if !ENABLE_WASM_STRIP_PINGUSER
+    if (!utl::isProductVersionUpgraded(false))
+    {
+        return;
+    }
+#endif
+    GraphicsRenderTests TestObject;
+    TestObject.run();
+}
+
+
+OUString MakeStartupErrorMessage(std::u16string_view aErrorMessage)
+{
+    return DpResId(STR_BOOTSTRAP_ERR_CANNOT_START) + "\n" + aErrorMessage;
+}
+
+
+// shows a simple error box with the given message ... but exits from these process !
+// Fatal errors can't be solved by the process ... nor any recovery can help.
+// Mostly the installation was damaged and must be repaired manually .. or by calling
+// setup again.
+// On the other side we must make sure that no further actions will be possible within
+// the current office process ! No pipe requests, no menu/toolbar/shortcut actions
+// are allowed. Otherwise we will force a "crash inside a crash".
+// That's why we have to use a special native message box here which does not use yield :-)
+
+void FatalError(const OUString& sMessage)
+{
+    OUString sProductKey = ::utl::Bootstrap::getProductKey();
+    if ( sProductKey.isEmpty())
+    {
+        osl_getExecutableFile( &sProductKey.pData );
+
+        ::sal_uInt32 nLastIndex = sProductKey.lastIndexOf('/');
+        if ( nLastIndex > 0 )
+            sProductKey = sProductKey.copy( nLastIndex+1 );
+    }
+
+    OUString sTitle = sProductKey + " - Fatal Error";
+    Application::ShowNativeErrorBox (sTitle, sMessage);
+    std::cerr << sTitle << ": " << sMessage << std::endl;
+    _exit(EXITHELPER_FATAL_ERROR);
+}
+
+}
+
+CommandLineArgs& Desktop::GetCommandLineArgs()
+{
+    static CommandLineArgs theCommandLineArgs;
+    return theCommandLineArgs;
+}
+
+OUString ReplaceStringHookProc( const OUString& rStr )
+{
+    const static OUString sBuildId(utl::Bootstrap::getBuildIdData("development")),
+        sBrandName(utl::ConfigManager::getProductName()),
+        sVersion(utl::ConfigManager::getProductVersion()),
+        sAboutBoxVersion(utl::ConfigManager::getAboutBoxProductVersion()),
+        sAboutBoxVersionSuffix(utl::ConfigManager::getAboutBoxProductVersionSuffix()),
+        sExtension(utl::ConfigManager::getProductExtension());
+
+    OUString sRet(rStr);
+    if (sRet.indexOf("%PRODUCT") != -1 || sRet.indexOf("%ABOUTBOX") != -1)
+    {
+        sRet = sRet.replaceAll( "%PRODUCTNAME", sBrandName );
+        sRet = sRet.replaceAll( "%PRODUCTVERSION", sVersion );
+        sRet = sRet.replaceAll( "%BUILDID", sBuildId );
+        sRet = sRet.replaceAll( "%ABOUTBOXPRODUCTVERSIONSUFFIX", sAboutBoxVersionSuffix );
+        sRet = sRet.replaceAll( "%ABOUTBOXPRODUCTVERSION", sAboutBoxVersion );
+        sRet = sRet.replaceAll( "%PRODUCTEXTENSION", sExtension );
+    }
+
+    if ( sRet.indexOf( "%OOOVENDOR" ) != -1 )
+    {
+        const static OUString sOOOVendor = utl::ConfigManager::getVendor();
+        sRet = sRet.replaceAll( "%OOOVENDOR", sOOOVendor );
+    }
+
+    return sRet;
+}
+
+Desktop::Desktop()
+    : m_bCleanedExtensionCache(false)
+    , m_bServicesRegistered(false)
+    , m_aBootstrapError(BE_OK)
+    , m_aBootstrapStatus(BS_OK)
+    , m_firstRunTimer( "desktop::Desktop m_firstRunTimer" )
+{
+    m_firstRunTimer.SetTimeout(3000); // 3 sec.
+    m_firstRunTimer.SetInvokeHandler(LINK(this, Desktop, AsyncInitFirstRun));
+}
+
+Desktop::~Desktop()
+{
+}
+
+void Desktop::Init()
+{
+    SetBootstrapStatus(BS_OK);
+
+#if HAVE_FEATURE_EXTENSIONS
+    m_bCleanedExtensionCache = cleanExtensionCache();
+#endif
+
+    // We need to have service factory before going further, but see fdo#37195.
+    // Doing this will mmap common.rdb, making it not overwritable on windows,
+    // so this can't happen before the synchronization above. Lets rework this
+    // so that the above is called *from* CreateApplicationServiceManager or
+    // something to enforce this gotcha
+    try
+    {
+        InitApplicationServiceManager();
+    }
+    catch (css::uno::Exception & e)
+    {
+        HandleBootstrapErrors( BE_UNO_SERVICEMANAGER, e.Message );
+        std::abort();
+    }
+
+    // Check whether safe mode is enabled
+    const CommandLineArgs& rCmdLineArgs = GetCommandLineArgs();
+    // Check if we are restarting from safe mode - in that case we don't want to enter it again
+    if (sfx2::SafeMode::hasRestartFlag())
+        sfx2::SafeMode::removeRestartFlag();
+    else if (rCmdLineArgs.IsSafeMode() || sfx2::SafeMode::hasFlag())
+        Application::EnableSafeMode();
+
+    // When we are in SafeMode we need to do changes before the configuration
+    // gets read (langselect::prepareLocale() by UNO API -> Components::Components)
+    // This may prepare SafeMode or restore from it by moving data in
+    // the UserConfiguration directory
+    comphelper::BackupFileHelper::reactOnSafeMode(Application::IsSafeModeEnabled());
+
+    if ( m_aBootstrapError == BE_OK )
+    {
+        try
+        {
+            if (!langselect::prepareLocale())
+            {
+                SetBootstrapError( BE_LANGUAGE_MISSING, OUString() );
+            }
+        }
+        catch (css::uno::Exception & e)
+        {
+            SetBootstrapError( BE_OFFICECONFIG_BROKEN, e.Message );
+        }
+
+        // test code for ProfileSafeMode to allow testing the fail
+        // of loading the office configuration initially. To use,
+        // either set to true and compile, or set a breakpoint
+        // in debugger and change the local bool
+        static bool bTryHardOfficeconfigBroken(false); // loplugin:constvars:ignore
+
+        if (bTryHardOfficeconfigBroken)
+        {
+            SetBootstrapError(BE_OFFICECONFIG_BROKEN, OUString());
+        }
+    }
+
+    // start ipc thread only for non-remote offices
+    RequestHandler::Status aStatus = RequestHandler::Enable(true);
+    if ( aStatus == RequestHandler::IPC_STATUS_PIPE_ERROR )
+    {
+#if defined(ANDROID) || defined(EMSCRIPTEN)
+        // Ignore crack pipe errors on Android
+#else
+        // Keep using this oddly named BE_PATHINFO_MISSING value
+        // for pipe-related errors on other platforms. Of course
+        // this crack with two (if not more) levels of our own
+        // error codes hiding the actual system error code is
+        // broken, but that is done all over the code, let's leave
+        // reengineering that to another year.
+        SetBootstrapError( BE_PATHINFO_MISSING, OUString() );
+#endif
+    }
+    else if ( aStatus == RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR )
+    {
+        SetBootstrapError( BE_PATHINFO_MISSING, OUString() );
+    }
+    else if ( aStatus == RequestHandler::IPC_STATUS_2ND_OFFICE )
+    {
+        // 2nd office startup should terminate after sending cmdlineargs through pipe
+        SetBootstrapStatus(BS_TERMINATE);
+    }
+    else if ( !rCmdLineArgs.GetUnknown().isEmpty()
+              || rCmdLineArgs.IsHelp() || rCmdLineArgs.IsVersion() )
+    {
+        // disable IPC thread in an instance that is just showing a help message
+        RequestHandler::Disable();
+    }
+    pSignalHandler = osl_addSignalHandler(SalMainPipeExchangeSignal_impl, nullptr);
+}
+
+void Desktop::InitFinished()
+{
+    CloseSplashScreen();
+}
+
+void Desktop::DeInit()
+{
+    try {
+        // instead of removing of the configManager just let it commit all the changes
+        utl::ConfigManager::storeConfigItems();
+        FlushConfiguration();
+
+        // close splashscreen if it's still open
+        CloseSplashScreen();
+        Reference< XComponent >(
+            comphelper::getProcessComponentContext(), UNO_QUERY_THROW )->
+            dispose();
+        // nobody should get a destroyed service factory...
+        ::comphelper::setProcessServiceFactory( nullptr );
+
+        // clear lockfile
+        m_xLockfile.reset();
+
+        RequestHandler::Disable();
+        if( pSignalHandler )
+            osl_removeSignalHandler( pSignalHandler );
+    } catch (const RuntimeException&) {
+        // someone threw an exception during shutdown
+        // this will leave some garbage behind...
+        TOOLS_WARN_EXCEPTION("desktop.app", "exception throwing during shutdown, will leave some garbage behind");
+    }
+}
+
+bool Desktop::QueryExit()
+{
+    try
+    {
+        utl::ConfigManager::storeConfigItems();
+    }
+    catch ( const RuntimeException& )
+    {
+    }
+
+    static constexpr OUStringLiteral SUSPEND_QUICKSTARTVETO = u"SuspendQuickstartVeto";
+
+    Reference< XDesktop2 > xDesktop = css::frame::Desktop::create( ::comphelper::getProcessComponentContext() );
+    Reference< XPropertySet > xPropertySet(xDesktop, UNO_QUERY_THROW);
+    xPropertySet->setPropertyValue( SUSPEND_QUICKSTARTVETO, Any(true) );
+
+    bool bExit = xDesktop->terminate();
+
+    if ( !bExit )
+    {
+        xPropertySet->setPropertyValue( SUSPEND_QUICKSTARTVETO, Any(false) );
+    }
+    else if (!Application::IsEventTestingModeEnabled())
+    {
+        FlushConfiguration();
+        try
+        {
+            // it is no problem to call RequestHandler::Disable() more than once
+            // it also looks to be threadsafe
+            RequestHandler::Disable();
+        }
+        catch ( const RuntimeException& )
+        {
+        }
+
+        m_xLockfile.reset();
+
+    }
+
+    return bExit;
+}
+
+void Desktop::Shutdown()
+{
+    framework::getDesktop(::comphelper::getProcessComponentContext())->shutdown();
+}
+
+void Desktop::HandleBootstrapPathErrors( ::utl::Bootstrap::Status aBootstrapStatus, std::u16string_view aDiagnosticMessage )
+{
+    if ( aBootstrapStatus == ::utl::Bootstrap::DATA_OK )
+        return;
+
+    OUString        aProductKey;
+    OUString        aTemp;
+
+    osl_getExecutableFile( &aProductKey.pData );
+    sal_uInt32     lastIndex = aProductKey.lastIndexOf('/');
+    if ( lastIndex > 0 )
+        aProductKey = aProductKey.copy( lastIndex+1 );
+
+    aTemp = ::utl::Bootstrap::getProductKey( aProductKey );
+    if ( !aTemp.isEmpty() )
+        aProductKey = aTemp;
+
+    OUString const aMessage(OUString::Concat(aDiagnosticMessage) + "\n");
+
+    std::unique_ptr<weld::MessageDialog> xBootstrapFailedBox(Application::CreateMessageDialog(nullptr,
+                                                             VclMessageType::Warning, VclButtonsType::Ok, aMessage));
+    xBootstrapFailedBox->set_title(aProductKey);
+    xBootstrapFailedBox->run();
+}
+
+// Create an error message depending on bootstrap failure code and an optional file url
+OUString    Desktop::CreateErrorMsgString(
+    utl::Bootstrap::FailureCode nFailureCode,
+    const OUString& aFileURL )
+{
+    OUString        aMsg;
+    bool            bFileInfo = true;
+
+    switch ( nFailureCode )
+    {
+        /// the shared installation directory could not be located
+        case ::utl::Bootstrap::MISSING_INSTALL_DIRECTORY:
+        {
+            aMsg = DpResId(STR_BOOTSTRAP_ERR_PATH_INVALID);
+            bFileInfo = false;
+        }
+        break;
+
+        /// the bootstrap INI file could not be found or read
+        case ::utl::Bootstrap::MISSING_BOOTSTRAP_FILE:
+        {
+            aMsg = DpResId(STR_BOOTSTRAP_ERR_FILE_MISSING);
+        }
+        break;
+
+        /// the bootstrap INI is missing a required entry
+        /// the bootstrap INI contains invalid data
+         case ::utl::Bootstrap::MISSING_BOOTSTRAP_FILE_ENTRY:
+         case ::utl::Bootstrap::INVALID_BOOTSTRAP_FILE_ENTRY:
+        {
+            aMsg = DpResId(STR_BOOTSTRAP_ERR_FILE_CORRUPT);
+        }
+        break;
+
+        /// the version locator INI file could not be found or read
+        case ::utl::Bootstrap::MISSING_VERSION_FILE:
+        {
+            aMsg = DpResId(STR_BOOTSTRAP_ERR_FILE_MISSING);
+        }
+        break;
+
+        /// the version locator INI has no entry for this version
+        case ::utl::Bootstrap::MISSING_VERSION_FILE_ENTRY:
+        {
+            aMsg = DpResId(STR_BOOTSTRAP_ERR_NO_SUPPORT);
+        }
+        break;
+
+        /// the user installation directory does not exist
+        case ::utl::Bootstrap::MISSING_USER_DIRECTORY:
+        {
+            aMsg = DpResId(STR_BOOTSTRAP_ERR_DIR_MISSING);
+        }
+        break;
+
+        /// some bootstrap data was invalid in unexpected ways
+        case ::utl::Bootstrap::INVALID_BOOTSTRAP_DATA:
+        {
+            aMsg = DpResId(STR_BOOTSTRAP_ERR_INTERNAL);
+            bFileInfo = false;
+        }
+        break;
+
+        case ::utl::Bootstrap::INVALID_VERSION_FILE_ENTRY:
+        {
+            // This needs to be improved, see #i67575#:
+            aMsg = "Invalid version file entry";
+            bFileInfo = false;
+        }
+        break;
+
+        case ::utl::Bootstrap::NO_FAILURE:
+        {
+            OSL_ASSERT(false);
+        }
+        break;
+    }
+
+    if ( bFileInfo )
+    {
+        OUString aMsgString( aMsg );
+        OUString        aFilePath;
+
+        osl::File::getSystemPathFromFileURL( aFileURL, aFilePath );
+
+        aMsgString = aMsgString.replaceFirst( "$1", aFilePath );
+        aMsg = aMsgString;
+    }
+
+    return MakeStartupErrorMessage( aMsg );
+}
+
+void Desktop::HandleBootstrapErrors(
+    BootstrapError aBootstrapError, OUString const & aErrorMessage )
+{
+    if ( aBootstrapError == BE_PATHINFO_MISSING )
+    {
+        OUString                    aErrorMsg;
+        OUString                    aBuffer;
+        utl::Bootstrap::Status        aBootstrapStatus;
+        utl::Bootstrap::FailureCode    nFailureCode;
+
+        aBootstrapStatus = ::utl::Bootstrap::checkBootstrapStatus( aBuffer, nFailureCode );
+        if ( aBootstrapStatus != ::utl::Bootstrap::DATA_OK )
+        {
+            switch ( nFailureCode )
+            {
+                case ::utl::Bootstrap::MISSING_INSTALL_DIRECTORY:
+                case ::utl::Bootstrap::INVALID_BOOTSTRAP_DATA:
+                {
+                    aErrorMsg = CreateErrorMsgString( nFailureCode, OUString() );
+                }
+                break;
+
+                /// the bootstrap INI file could not be found or read
+                /// the bootstrap INI is missing a required entry
+                /// the bootstrap INI contains invalid data
+                case ::utl::Bootstrap::MISSING_BOOTSTRAP_FILE_ENTRY:
+                case ::utl::Bootstrap::INVALID_BOOTSTRAP_FILE_ENTRY:
+                case ::utl::Bootstrap::MISSING_BOOTSTRAP_FILE:
+                {
+                    OUString aBootstrapFileURL;
+
+                    utl::Bootstrap::locateBootstrapFile( aBootstrapFileURL );
+                    aErrorMsg = CreateErrorMsgString( nFailureCode, aBootstrapFileURL );
+                }
+                break;
+
+                /// the version locator INI file could not be found or read
+                /// the version locator INI has no entry for this version
+                /// the version locator INI entry is not a valid directory URL
+                 case ::utl::Bootstrap::INVALID_VERSION_FILE_ENTRY:
+                 case ::utl::Bootstrap::MISSING_VERSION_FILE_ENTRY:
+                 case ::utl::Bootstrap::MISSING_VERSION_FILE:
+                {
+                    OUString aVersionFileURL;
+
+                    utl::Bootstrap::locateVersionFile( aVersionFileURL );
+                    aErrorMsg = CreateErrorMsgString( nFailureCode, aVersionFileURL );
+                }
+                break;
+
+                /// the user installation directory does not exist
+                 case ::utl::Bootstrap::MISSING_USER_DIRECTORY:
+                {
+                    OUString aUserInstallationURL;
+
+                    utl::Bootstrap::locateUserInstallation( aUserInstallationURL );
+                    aErrorMsg = CreateErrorMsgString( nFailureCode, aUserInstallationURL );
+                }
+                break;
+
+                case ::utl::Bootstrap::NO_FAILURE:
+                {
+                    OSL_ASSERT(false);
+                }
+                break;
+            }
+
+            HandleBootstrapPathErrors( aBootstrapStatus, aErrorMsg );
+        }
+    }
+    else if ( aBootstrapError == BE_UNO_SERVICEMANAGER || aBootstrapError == BE_UNO_SERVICE_CONFIG_MISSING )
+    {
+        // UNO service manager is not available. VCL needs a UNO service manager to display a message box!!!
+        // Currently we are not able to display a message box with a service manager due to this limitations inside VCL.
+
+        // When UNO is not properly initialized, all kinds of things can fail
+        // and cause the process to crash. To give the user a hint even if
+        // generating and displaying a message box below crashes, print a
+        // hard-coded message on stderr first:
+        std::cerr
+            << "The application cannot be started.\n"
+                // STR_BOOTSTRAP_ERR_CANNOT_START
+            << (aBootstrapError == BE_UNO_SERVICEMANAGER
+                ? "The component manager is not available.\n"
+                    // STR_BOOTSTRAP_ERR_NO_SERVICE
+                : "The configuration service is not available.\n");
+                    // STR_BOOTSTRAP_ERR_NO_CFG_SERVICE
+        if ( !aErrorMessage.isEmpty() )
+        {
+            std::cerr << "(\"" << aErrorMessage << "\")\n";
+        }
+
+        // First sentence. We cannot bootstrap office further!
+        OUString aDiagnosticMessage = DpResId(STR_BOOTSTRAP_ERR_NO_CFG_SERVICE) + "\n";
+        if ( !aErrorMessage.isEmpty() )
+        {
+            aDiagnosticMessage += "(\"" + aErrorMessage + "\")\n";
+        }
+
+        // Due to the fact the we haven't a backup applicat.rdb file anymore it is not possible to
+        // repair the installation with the setup executable besides the office executable. Now
+        // we have to ask the user to start the setup on CD/installation directory manually!!
+        aDiagnosticMessage += DpResId(STR_ASK_START_SETUP_MANUALLY);
+
+        FatalError(MakeStartupErrorMessage(aDiagnosticMessage));
+    }
+    else if ( aBootstrapError == BE_OFFICECONFIG_BROKEN )
+    {
+        // set flag at BackupFileHelper to be able to know if _exit was called and
+        // actions are executed after this. This method we are in will not return,
+        // but end up in a _exit() call
+        comphelper::BackupFileHelper::setExitWasCalled();
+
+        // enter safe mode, too
+        sfx2::SafeMode::putFlag();
+
+        OUString msg(DpResId(STR_CONFIG_ERR_ACCESS_GENERAL));
+        if (!aErrorMessage.isEmpty()) {
+            msg += "\n(\"" + aErrorMessage + "\")";
+        }
+        FatalError(MakeStartupErrorMessage(msg));
+    }
+    else if ( aBootstrapError == BE_USERINSTALL_FAILED )
+    {
+        OUString aDiagnosticMessage = DpResId(STR_BOOTSTRAP_ERR_USERINSTALL_FAILED);
+        FatalError(MakeStartupErrorMessage(aDiagnosticMessage));
+    }
+    else if ( aBootstrapError == BE_LANGUAGE_MISSING )
+    {
+        OUString aDiagnosticMessage = DpResId(STR_BOOTSTRAP_ERR_LANGUAGE_MISSING);
+        FatalError(MakeStartupErrorMessage(aDiagnosticMessage));
+    }
+    else if (( aBootstrapError == BE_USERINSTALL_NOTENOUGHDISKSPACE ) ||
+             ( aBootstrapError == BE_USERINSTALL_NOWRITEACCESS      ))
+    {
+        OUString aUserInstallationURL;
+        OUString aUserInstallationPath;
+        utl::Bootstrap::locateUserInstallation( aUserInstallationURL );
+        osl::File::getSystemPathFromFileURL( aUserInstallationURL, aUserInstallationPath );
+
+        OUString aDiagnosticMessage;
+        if ( aBootstrapError == BE_USERINSTALL_NOTENOUGHDISKSPACE )
+            aDiagnosticMessage = DpResId(STR_BOOTSTRAP_ERR_NOTENOUGHDISKSPACE);
+        else
+            aDiagnosticMessage = DpResId(STR_BOOTSTRAP_ERR_NOACCESSRIGHTS);
+        aDiagnosticMessage += aUserInstallationPath;
+
+        FatalError(MakeStartupErrorMessage(aDiagnosticMessage));
+    }
+}
+
+
+namespace {
+
+
+#if HAVE_FEATURE_BREAKPAD
+void handleCrashReport()
+{
+    static constexpr OUStringLiteral SERVICENAME_CRASHREPORT = u"com.sun.star.comp.svx.CrashReportUI";
+
+    css::uno::Reference< css::uno::XComponentContext > xContext = ::comphelper::getProcessComponentContext();
+
+    Reference< css::frame::XSynchronousDispatch > xRecoveryUI(
+        xContext->getServiceManager()->createInstanceWithContext(SERVICENAME_CRASHREPORT, xContext),
+        css::uno::UNO_QUERY_THROW);
+
+    Reference< css::util::XURLTransformer > xURLParser =
+        css::util::URLTransformer::create(::comphelper::getProcessComponentContext());
+
+    css::util::URL aURL;
+    css::uno::Any aRet = xRecoveryUI->dispatchWithReturnValue(aURL, css::uno::Sequence< css::beans::PropertyValue >());
+    bool bRet = false;
+    aRet >>= bRet;
+}
+#endif
+
+#if !defined ANDROID
+void handleSafeMode()
+{
+    css::uno::Reference< css::uno::XComponentContext > xContext = ::comphelper::getProcessComponentContext();
+
+    Reference< css::frame::XSynchronousDispatch > xSafeModeUI(
+        xContext->getServiceManager()->createInstanceWithContext("com.sun.star.comp.svx.SafeModeUI", xContext),
+        css::uno::UNO_QUERY_THROW);
+
+    css::util::URL aURL;
+    css::uno::Any aRet = xSafeModeUI->dispatchWithReturnValue(aURL, css::uno::Sequence< css::beans::PropertyValue >());
+    bool bRet = false;
+    aRet >>= bRet;
+}
+#endif
+
+/** @short  check if recovery must be started or not.
+
+    @param  bCrashed [boolean ... out!]
+            the office crashed last times.
+            But may be there are no recovery data.
+            Useful to trigger the error report tool without
+            showing the recovery UI.
+
+    @param  bRecoveryDataExists [boolean ... out!]
+            there exists some recovery data.
+
+    @param  bSessionDataExists [boolean ... out!]
+            there exists some session data.
+            Because the user may be logged out last time from its
+            unix session...
+*/
+void impl_checkRecoveryState(bool& bCrashed           ,
+                             bool& bRecoveryDataExists,
+                             bool& bSessionDataExists )
+{
+    bCrashed = officecfg::Office::Recovery::RecoveryInfo::Crashed::get()
+#if HAVE_FEATURE_BREAKPAD
+        || CrashReporter::crashReportInfoExists();
+#else
+        ;
+#endif
+    bool elements = officecfg::Office::Recovery::RecoveryList::get()->
+        hasElements();
+    bool session
+        = officecfg::Office::Recovery::RecoveryInfo::SessionData::get();
+    bRecoveryDataExists = elements && !session;
+    bSessionDataExists = elements && session;
+}
+
+Reference< css::frame::XSynchronousDispatch > g_xRecoveryUI;
+
+template <class Ref>
+struct RefClearGuard
+{
+    Ref& m_Ref;
+    RefClearGuard(Ref& ref) : m_Ref(ref) {}
+    ~RefClearGuard() { m_Ref.clear(); }
+};
+
+/*  @short  start the recovery wizard.
+
+    @param  bEmergencySave
+            differs between EMERGENCY_SAVE and RECOVERY
+*/
+#if !ENABLE_WASM_STRIP_RECOVERYUI
+bool impl_callRecoveryUI(bool bEmergencySave     ,
+                         bool bExistsRecoveryData)
+{
+    constexpr OUStringLiteral COMMAND_EMERGENCYSAVE = u"vnd.sun.star.autorecovery:/doEmergencySave";
+    constexpr OUStringLiteral COMMAND_RECOVERY = u"vnd.sun.star.autorecovery:/doAutoRecovery";
+
+    css::uno::Reference< css::uno::XComponentContext > xContext = ::comphelper::getProcessComponentContext();
+
+    g_xRecoveryUI.set(
+        xContext->getServiceManager()->createInstanceWithContext("com.sun.star.comp.svx.RecoveryUI", xContext),
+        css::uno::UNO_QUERY_THROW);
+    RefClearGuard<Reference< css::frame::XSynchronousDispatch >> refClearGuard(g_xRecoveryUI);
+
+    Reference< css::util::XURLTransformer > xURLParser =
+        css::util::URLTransformer::create(xContext);
+
+    css::util::URL aURL;
+    if (bEmergencySave)
+        aURL.Complete = COMMAND_EMERGENCYSAVE;
+    else if (bExistsRecoveryData)
+        aURL.Complete = COMMAND_RECOVERY;
+    else
+        return false;
+
+    xURLParser->parseStrict(aURL);
+
+    css::uno::Any aRet = g_xRecoveryUI->dispatchWithReturnValue(aURL, css::uno::Sequence< css::beans::PropertyValue >());
+    bool bRet = false;
+    aRet >>= bRet;
+    return bRet;
+}
+#endif
+
+bool impl_bringToFrontRecoveryUI()
+{
+    Reference< css::frame::XSynchronousDispatch > xRecoveryUI(g_xRecoveryUI);
+    if (!xRecoveryUI.is())
+        return false;
+
+    css::util::URL aURL;
+    aURL.Complete = "vnd.sun.star.autorecovery:/doBringToFront";
+    Reference< css::util::XURLTransformer > xURLParser =
+        css::util::URLTransformer::create(::comphelper::getProcessComponentContext());
+    xURLParser->parseStrict(aURL);
+
+    css::uno::Any aRet = xRecoveryUI->dispatchWithReturnValue(aURL, css::uno::Sequence< css::beans::PropertyValue >());
+    bool bRet = false;
+    aRet >>= bRet;
+    return bRet;
+}
+
+}
+
+namespace {
+
+void restartOnMac(bool passArguments) {
+#if defined MACOSX
+    RequestHandler::Disable();
+#if HAVE_FEATURE_MACOSX_SANDBOX
+    (void) passArguments; // avoid warnings
+    OUString aMessage = DpResId(STR_LO_MUST_BE_RESTARTED);
+
+    std::unique_ptr<weld::MessageDialog> xRestartBox(Application::CreateMessageDialog(nullptr,
+                                                     VclMessageType::Warning, VclButtonsType::Ok, aMessage));
+    xRestartBox->run();
+#else
+    OUString execUrl;
+    OSL_VERIFY(osl_getExecutableFile(&execUrl.pData) == osl_Process_E_None);
+    OUString execPath;
+    OString execPath8;
+    if ((osl::FileBase::getSystemPathFromFileURL(execUrl, execPath)
+         != osl::FileBase::E_None) ||
+        !execPath.convertToString(
+            &execPath8, osl_getThreadTextEncoding(),
+            (RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR |
+             RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR)))
+    {
+        std::abort();
+    }
+    std::vector< OString > args { execPath8 };
+    bool wait = false;
+    if (passArguments) {
+        sal_uInt32 n = osl_getCommandArgCount();
+        for (sal_uInt32 i = 0; i < n; ++i) {
+            OUString arg;
+            osl_getCommandArg(i, &arg.pData);
+            if (arg.match("--accept=")) {
+                wait = true;
+            }
+            OString arg8;
+            if (!arg.convertToString(
+                    &arg8, osl_getThreadTextEncoding(),
+                    (RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR |
+                     RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR)))
+            {
+                std::abort();
+            }
+            args.push_back(arg8);
+        }
+    }
+    std::vector< char const * > argPtrs;
+    for (auto const& elem : args)
+    {
+        argPtrs.push_back(elem.getStr());
+    }
+    argPtrs.push_back(nullptr);
+    execv(execPath8.getStr(), const_cast< char ** >(argPtrs.data()));
+    if (errno == ENOTSUP) { // happens when multithreaded on macOS < 10.6
+        pid_t pid = fork();
+        if (pid == 0) {
+            execv(execPath8.getStr(), const_cast< char ** >(argPtrs.data()));
+        } else if (pid > 0) {
+            // Two simultaneously running soffice processes lead to two dock
+            // icons, so avoid waiting here unless it must be assumed that the
+            // process invoking soffice itself wants to wait for soffice to
+            // finish:
+            if (!wait) {
+                return;
+            }
+            int stat;
+            if (waitpid(pid, &stat, 0) == pid && WIFEXITED(stat)) {
+                _exit(WEXITSTATUS(stat));
+            }
+        }
+    }
+    std::abort();
+#endif
+#else
+    (void) passArguments; // avoid warnings
+#endif
+}
+
+#if HAVE_FEATURE_UPDATE_MAR
+bool isTimeForUpdateCheck()
+{
+    sal_uInt64 nLastUpdate = officecfg::Office::Update::Update::LastUpdateTime::get();
+    sal_uInt64 nNow = tools::Time::GetSystemTicks();
+
+    sal_uInt64 n7DayInMS = 1000 * 60 * 60 * 12 * 1; // 12 hours in ms
+    if (nNow - n7DayInMS >= nLastUpdate)
+        return true;
+
+    return false;
+}
+#endif
+
+}
+
+void Desktop::Exception(ExceptionCategory nCategory)
+{
+    // protect against recursive calls
+    static bool bInException = false;
+
+#if HAVE_FEATURE_BREAKPAD
+    CrashReporter::removeExceptionHandler(); // disallow re-entry
+#endif
+
+    SystemWindowFlags nOldMode = Application::GetSystemWindowMode();
+    Application::SetSystemWindowMode( nOldMode & ~SystemWindowFlags::NOAUTOMODE );
+    if ( bInException )
+    {
+        Application::Abort( OUString() );
+    }
+
+    bInException = true;
+    const CommandLineArgs& rArgs = GetCommandLineArgs();
+
+    // save all modified documents ... if it's allowed doing so.
+    bool bRestart                           = false;
+    bool bAllowRecoveryAndSessionManagement = (
+                                                    ( !rArgs.IsNoRestore()                    ) && // some use cases of office must work without recovery
+                                                    ( !rArgs.IsHeadless()                     ) &&
+                                                    ( nCategory != ExceptionCategory::UserInterface ) && // recovery can't work without UI ... but UI layer seems to be the reason for this crash
+                                                    ( Application::IsInExecute()               )    // crashes during startup and shutdown should be ignored (they indicate a corrupted installation...)
+                                                  );
+    if ( bAllowRecoveryAndSessionManagement )
+    {
+        // Save all open documents so they will be reopened
+        // the next time the application is started
+        // returns true if at least one document could be saved...
+#if !ENABLE_WASM_STRIP_RECOVERYUI
+        bRestart = impl_callRecoveryUI(
+                        true , // force emergency save
+                        false);
+#endif
+    }
+
+    FlushConfiguration();
+
+    m_xLockfile.reset();
+
+    if( bRestart )
+    {
+        RequestHandler::Disable();
+        if( pSignalHandler )
+            osl_removeSignalHandler( pSignalHandler );
+
+        restartOnMac(false);
+#if !ENABLE_WASM_STRIP_SPLASH
+        if ( m_rSplashScreen.is() )
+            m_rSplashScreen->reset();
+#endif
+
+        _exit( EXITHELPER_CRASH_WITH_RESTART );
+    }
+    else
+    {
+        Application::Abort( OUString() );
+    }
+
+    OSL_ASSERT(false); // unreachable
+}
+
+void Desktop::AppEvent( const ApplicationEvent& rAppEvent )
+{
+    HandleAppEvent( rAppEvent );
+}
+
+namespace {
+
+class JVMloadThread : public salhelper::Thread {
+public:
+    JVMloadThread() : salhelper::Thread("Preload JVM thread")
+    {
+    }
+
+private:
+    virtual void execute() override final
+    {
+        Reference< XMultiServiceFactory > xSMgr = comphelper::getProcessServiceFactory();
+
+        Reference< css::loader::XImplementationLoader > xJavaComponentLoader(
+            xSMgr->createInstance("com.sun.star.comp.stoc.JavaComponentLoader"),
+            css::uno::UNO_QUERY_THROW);
+
+        if (xJavaComponentLoader.is())
+        {
+            const css::uno::Reference< ::com::sun::star::registry::XRegistryKey > xRegistryKey;
+            try
+            {
+                xJavaComponentLoader->activate("", "", "", xRegistryKey);
+            }
+            catch (...)
+            {
+                SAL_WARN("desktop.app", "Cannot activate factory during JVM preloading");
+            }
+        }
+    }
+};
+
+struct ExecuteGlobals
+{
+    Reference < css::document::XDocumentEventListener > xGlobalBroadcaster;
+    bool bRestartRequested;
+    bool bUseSystemFileDialog;
+    std::unique_ptr<SvtCTLOptions> pCTLLanguageOptions;
+    std::unique_ptr<SvtPathOptions> pPathOptions;
+    rtl::Reference< JVMloadThread > xJVMloadThread;
+
+    ExecuteGlobals()
+    : bRestartRequested( false )
+    , bUseSystemFileDialog( true )
+    {}
+};
+
+}
+
+static ExecuteGlobals* pExecGlobals = nullptr;
+
+int Desktop::Main()
+{
+    pExecGlobals = new ExecuteGlobals();
+
+    // Remember current context object
+    css::uno::ContextLayer layer( css::uno::getCurrentContext() );
+
+    if ( m_aBootstrapError != BE_OK )
+    {
+        HandleBootstrapErrors( m_aBootstrapError, m_aBootstrapErrorMessage );
+        return EXIT_FAILURE;
+    }
+
+    BootstrapStatus eStatus = GetBootstrapStatus();
+    if (eStatus == BS_TERMINATE) {
+        return EXIT_SUCCESS;
+    }
+
+    // Detect desktop environment - need to do this as early as possible
+    css::uno::setCurrentContext( new DesktopContext( css::uno::getCurrentContext() ) );
+
+    if (officecfg::Office::Common::Misc::PreloadJVM::get() && pExecGlobals)
+    {
+        SAL_INFO("desktop.app", "Preload JVM");
+
+        // pre-load JVM
+        pExecGlobals->xJVMloadThread = new JVMloadThread();
+        pExecGlobals->xJVMloadThread->launch();
+    }
+
+    CommandLineArgs& rCmdLineArgs = GetCommandLineArgs();
+
+    Translate::SetReadStringHook(ReplaceStringHookProc);
+
+    // Startup screen
+#if !ENABLE_WASM_STRIP_SPLASH
+    OpenSplashScreen();
+#endif
+
+    SetSplashScreenProgress(10);
+
+    userinstall::Status inst_fin = userinstall::finalize();
+    if (inst_fin != userinstall::EXISTED && inst_fin != userinstall::CREATED)
+    {
+        SAL_WARN( "desktop.app", "userinstall failed: " << inst_fin);
+        if ( inst_fin == userinstall::ERROR_NO_SPACE )
+            HandleBootstrapErrors(
+                BE_USERINSTALL_NOTENOUGHDISKSPACE, OUString() );
+        else if ( inst_fin == userinstall::ERROR_CANT_WRITE )
+            HandleBootstrapErrors( BE_USERINSTALL_NOWRITEACCESS, OUString() );
+        else
+            HandleBootstrapErrors( BE_USERINSTALL_FAILED, OUString() );
+        return EXIT_FAILURE;
+    }
+    // refresh path information
+    utl::Bootstrap::reloadData();
+    SetSplashScreenProgress(20);
+
+    Reference< XComponentContext > xContext = ::comphelper::getProcessComponentContext();
+
+    Reference< XRestartManager > xRestartManager( OfficeRestartManager::get(xContext) );
+
+    Reference< XDesktop2 > xDesktop;
+
+    RegisterServices();
+
+    SetSplashScreenProgress(25);
+
+#if HAVE_FEATURE_DESKTOP && !defined(EMSCRIPTEN)
+    // check user installation directory for lockfile so we can be sure
+    // there is no other instance using our data files from a remote host
+
+    bool bMustLockProfile = ( getenv( "SAL_NOLOCK_PROFILE" ) == nullptr );
+    if ( bMustLockProfile )
+    {
+        m_xLockfile.reset(new Lockfile);
+
+        if ( !rCmdLineArgs.IsHeadless() && !rCmdLineArgs.IsInvisible() &&
+             !rCmdLineArgs.IsNoLockcheck() && !m_xLockfile->check( Lockfile_execWarning ))
+        {
+            // Lockfile exists, and user clicked 'no'
+            return EXIT_FAILURE;
+        }
+    }
+
+    // check if accessibility is enabled but not working and allow to quit
+    if( Application::GetSettings().GetMiscSettings().GetEnableATToolSupport() )
+    {
+        if( !InitAccessBridge() )
+            return EXIT_FAILURE;
+    }
+#endif
+
+    // terminate if requested...
+    if( rCmdLineArgs.IsTerminateAfterInit() )
+        return EXIT_SUCCESS;
+
+    //  Read the common configuration items for optimization purpose
+    if ( !InitializeConfiguration() )
+        return EXIT_FAILURE;
+
+#if HAVE_FEATURE_UPDATE_MAR
+    const char* pUpdaterTestEnable = std::getenv("LIBO_UPDATER_TEST_ENABLE");
+    if (pUpdaterTestEnable || officecfg::Office::Update::Update::Enabled::get())
+    {
+        // check if we just updated
+        const char* pUpdaterRunning = std::getenv("LIBO_UPDATER_TEST_RUNNING");
+        bool bUpdateRunning = officecfg::Office::Update::Update::UpdateRunning::get() || pUpdaterRunning;
+        if (bUpdateRunning)
+        {
+            OUString aSeeAlso = officecfg::Office::Update::Update::SeeAlso::get();
+            OUString aOldBuildID = officecfg::Office::Update::Update::OldBuildID::get();
+
+            OUString aBuildID = Updater::getBuildID();
+            if (aOldBuildID == aBuildID)
+            {
+                Updater::log("Old and new Build ID are the same. No Updating took place.");
+            }
+            else
+            {
+                if (!aSeeAlso.isEmpty())
+                {
+                    SAL_INFO("desktop.updater", "See also: " << aSeeAlso);
+                            Reference< css::system::XSystemShellExecute > xSystemShell(
+                    SystemShellExecute::create(::comphelper::getProcessComponentContext()) );
+
+                    xSystemShell->execute( aSeeAlso, OUString(), SystemShellExecuteFlags::URIS_ONLY );
+                }
+            }
+
+            // reset all the configuration values,
+            // all values need to be read before this code
+            std::shared_ptr< comphelper::ConfigurationChanges > batch(
+                    comphelper::ConfigurationChanges::create());
+            officecfg::Office::Update::Update::UpdateRunning::set(false, batch);
+            officecfg::Office::Update::Update::SeeAlso::set(OUString(), batch);
+            officecfg::Office::Update::Update::OldBuildID::set(OUString(), batch);
+            batch->commit();
+
+            Updater::removeUpdateFiles();
+        }
+
+        osl::DirectoryItem aUpdateFile;
+        osl::DirectoryItem::get(Updater::getUpdateFileURL(), aUpdateFile);
+
+        const char* pUpdaterTestUpdate = std::getenv("LIBO_UPDATER_TEST_UPDATE");
+        const char* pForcedUpdateCheck = std::getenv("LIBO_UPDATER_TEST_UPDATE_CHECK");
+        if (pUpdaterTestUpdate || aUpdateFile.is())
+        {
+            OUString aBuildID("${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version") ":buildid}");
+            rtl::Bootstrap::expandMacros(aBuildID);
+            std::shared_ptr< comphelper::ConfigurationChanges > batch(
+                    comphelper::ConfigurationChanges::create());
+            officecfg::Office::Update::Update::OldBuildID::set(aBuildID, batch);
+            officecfg::Office::Update::Update::UpdateRunning::set(true, batch);
+            batch->commit();
+
+            // make sure the change is written to the configuration before we start the update
+            css::uno::Reference<css::util::XFlushable> xFlushable(css::configuration::theDefaultProvider::get(xContext), UNO_QUERY);
+            xFlushable->flush();
+            // avoid the old oosplash staying around
+            CloseSplashScreen();
+            bool bSuccess = update();
+            if (bSuccess)
+                return EXIT_SUCCESS;
+        }
+        else if (isTimeForUpdateCheck() || pForcedUpdateCheck)
+        {
+            sal_uInt64 nNow = tools::Time::GetSystemTicks();
+            Updater::log("Update Check Time: " + OUString::number(nNow));
+            std::shared_ptr< comphelper::ConfigurationChanges > batch(
+                    comphelper::ConfigurationChanges::create());
+            officecfg::Office::Update::Update::LastUpdateTime::set(nNow, batch);
+            batch->commit();
+            m_aUpdateThread = std::thread(update_checker);
+        }
+    }
+#endif
+
+    SetSplashScreenProgress(30);
+
+    // create title string
+    OUString aTitle(ReplaceStringHookProc(RID_APPTITLE));
+#ifdef DBG_UTIL
+    //include buildid in non product builds
+    aTitle += " [" + utl::Bootstrap::getBuildIdData("development") + "]";
+#endif
+
+    SetDisplayName( aTitle );
+    SetSplashScreenProgress(35);
+    pExecGlobals->pPathOptions.reset( new SvtPathOptions);
+    SetSplashScreenProgress(40);
+
+    xDesktop = css::frame::Desktop::create( xContext );
+
+    // create service for loading SFX (still needed in startup)
+    pExecGlobals->xGlobalBroadcaster = Reference < css::document::XDocumentEventListener >
+        ( css::frame::theGlobalEventBroadcaster::get(xContext), UNO_SET_THROW );
+
+    /* ensure existence of a default window that messages can be dispatched to
+       This is for the benefit of testtool which uses PostUserEvent extensively
+       and else can deadlock while creating this window from another thread while
+       the main thread is not yet in the event loop.
+    */
+    Application::GetDefaultDevice();
+
+#if HAVE_FEATURE_EXTENSIONS
+    // Check if bundled or shared extensions were added /removed
+    // and process those extensions (has to be done before checking
+    // the extension dependencies!
+    SynchronizeExtensionRepositories(m_bCleanedExtensionCache, this);
+    bool bAbort = CheckExtensionDependencies();
+    if ( bAbort )
+        return EXIT_FAILURE;
+
+    if (inst_fin == userinstall::CREATED)
+    {
+        Migration::migrateSettingsIfNecessary();
+    }
+#endif
+
+    // keep a language options instance...
+    pExecGlobals->pCTLLanguageOptions.reset( new SvtCTLOptions(true));
+
+    css::document::DocumentEvent aEvent;
+    aEvent.EventName = "OnStartApp";
+    pExecGlobals->xGlobalBroadcaster->documentEventOccured(aEvent);
+
+    SetSplashScreenProgress(50);
+
+    // Backing Component
+    bool bCrashed            = false;
+    bool bExistsRecoveryData = false;
+    bool bExistsSessionData  = false;
+
+    impl_checkRecoveryState(bCrashed, bExistsRecoveryData, bExistsSessionData);
+
+    OUString pidfileName = rCmdLineArgs.GetPidfileName();
+    if ( !pidfileName.isEmpty() )
+    {
+        OUString pidfileURL;
+
+        if ( osl_getFileURLFromSystemPath(pidfileName.pData, &pidfileURL.pData) == osl_File_E_None )
+        {
+            osl::File pidfile( pidfileURL );
+            osl::FileBase::RC rc;
+
+            osl::File::remove( pidfileURL );
+            if ( (rc = pidfile.open( osl_File_OpenFlag_Write | osl_File_OpenFlag_Create ) ) == osl::File::E_None )
+            {
+                OString pid( OString::number( GETPID() ) );
+                sal_uInt64 written = 0;
+                if ( pidfile.write(pid.getStr(), pid.getLength(), written) != osl::File::E_None )
+                {
+                    SAL_WARN("desktop.app", "cannot write pidfile " << pidfile.getURL());
+                }
+                pidfile.close();
+            }
+            else
+            {
+                SAL_WARN("desktop.app", "cannot open pidfile " << pidfile.getURL() << rc);
+            }
+        }
+        else
+        {
+            SAL_WARN("desktop.app", "cannot get pidfile URL from path" << pidfileName);
+        }
+    }
+
+    if ( rCmdLineArgs.IsHeadless() || rCmdLineArgs.IsEventTesting() )
+    {
+        // Ensure that we use not the system file dialogs as
+        // headless mode relies on Application::EnableHeadlessMode()
+        // which does only work for VCL dialogs!!
+        pExecGlobals->bUseSystemFileDialog = officecfg::Office::Common::Misc::UseSystemFileDialog::get();
+        std::shared_ptr< comphelper::ConfigurationChanges > xChanges(
+                comphelper::ConfigurationChanges::create());
+        officecfg::Office::Common::Misc::UseSystemFileDialog::set( false, xChanges );
+        xChanges->commit();
+    }
+
+    pExecGlobals->bRestartRequested = xRestartManager->isRestartRequested(true);
+    if ( !pExecGlobals->bRestartRequested )
+    {
+        if ((!rCmdLineArgs.WantsToLoadDocument() && !rCmdLineArgs.IsInvisible() && !rCmdLineArgs.IsHeadless() && !rCmdLineArgs.IsQuickstart()) &&
+            (SvtModuleOptions().IsModuleInstalled(SvtModuleOptions::EModule::STARTMODULE)) &&
+            (!bExistsRecoveryData                                                  ) &&
+            (!bExistsSessionData                                                   ) &&
+            (!Application::AnyInput( VclInputFlags::APPEVENT )                          ))
+        {
+             ShowBackingComponent(this);
+        }
+    }
+
+    SetSplashScreenProgress(55);
+
+    svtools::ApplyFontSubstitutionsToVcl();
+
+    SvtTabAppearanceCfg aAppearanceCfg;
+    SvtTabAppearanceCfg::SetInitialized();
+    aAppearanceCfg.SetApplicationDefaults( this );
+    SvtAccessibilityOptions aOptions;
+    aOptions.SetVCLSettings();
+    SetSplashScreenProgress(60);
+
+    if ( !pExecGlobals->bRestartRequested )
+    {
+        Application::SetFilterHdl( LINK( this, Desktop, ImplInitFilterHdl ) );
+
+        // Preload function depends on an initialized sfx application!
+        SetSplashScreenProgress(75);
+
+        // use system window dialogs
+        Application::SetSystemWindowMode( SystemWindowFlags::DIALOG );
+
+        SetSplashScreenProgress(80);
+
+        if ( !rCmdLineArgs.IsInvisible() &&
+             !rCmdLineArgs.IsNoQuickstart() )
+            InitializeQuickstartMode( xContext );
+
+        if ( xDesktop.is() )
+            xDesktop->addTerminateListener( new RequestHandlerController );
+        SetSplashScreenProgress(100);
+
+        // FIXME: move this somewhere sensible.
+#if HAVE_FEATURE_OPENCL
+        CheckOpenCLCompute(xDesktop);
+#endif
+
+        //Running the VCL graphics rendering tests
+        runGraphicsRenderTests();
+
+        // Post user event to startup first application component window
+        // We have to send this OpenClients message short before execute() to
+        // minimize the risk that this message overtakes type detection construction!!
+        Application::PostUserEvent( LINK( this, Desktop, OpenClients_Impl ) );
+
+        // Post event to enable acceptors
+        Application::PostUserEvent( LINK( this, Desktop, EnableAcceptors_Impl) );
+
+        // call Application::Execute to process messages in vcl message loop
+#if HAVE_FEATURE_JAVA
+        // The JavaContext contains an interaction handler which is used when
+        // the creation of a Java Virtual Machine fails
+        css::uno::ContextLayer layer2(
+            new svt::JavaContext( css::uno::getCurrentContext() ) );
+#endif
+        // check whether the shutdown is caused by restart just before entering the Execute
+        pExecGlobals->bRestartRequested = pExecGlobals->bRestartRequested ||
+                xRestartManager->isRestartRequested(true);
+
+        if ( !pExecGlobals->bRestartRequested )
+        {
+            // if this run of the office is triggered by restart, some additional actions should be done
+            DoRestartActionsIfNecessary( !rCmdLineArgs.IsInvisible() && !rCmdLineArgs.IsNoQuickstart() );
+
+            Execute();
+        }
+    }
+    else
+    {
+        if (xDesktop.is())
+            xDesktop->terminate();
+    }
+    // CAUTION: you do not necessarily get here e.g. on the Mac.
+    // please put all deinitialization code into doShutdown
+    return doShutdown();
+}
+
+int Desktop::doShutdown()
+{
+    if( ! pExecGlobals )
+        return EXIT_SUCCESS;
+
+    if (m_aUpdateThread.joinable())
+        m_aUpdateThread.join();
+
+    if (pExecGlobals->xJVMloadThread.is())
+    {
+        pExecGlobals->xJVMloadThread->join();
+        pExecGlobals->xJVMloadThread.clear();
+    }
+
+    pExecGlobals->bRestartRequested = pExecGlobals->bRestartRequested ||
+        OfficeRestartManager::get(comphelper::getProcessComponentContext())->
+        isRestartRequested(true);
+    if ( pExecGlobals->bRestartRequested )
+        SetRestartState();
+
+    // Restore old value
+    const CommandLineArgs& rCmdLineArgs = GetCommandLineArgs();
+    if ( rCmdLineArgs.IsHeadless() || rCmdLineArgs.IsEventTesting() )
+    {
+        std::shared_ptr< comphelper::ConfigurationChanges > xChanges(
+                comphelper::ConfigurationChanges::create());
+        officecfg::Office::Common::Misc::UseSystemFileDialog::set( pExecGlobals->bUseSystemFileDialog, xChanges );
+        xChanges->commit();
+    }
+
+    OUString pidfileName = rCmdLineArgs.GetPidfileName();
+    if ( !pidfileName.isEmpty() )
+    {
+        OUString pidfileURL;
+
+        if ( osl_getFileURLFromSystemPath(pidfileName.pData, &pidfileURL.pData) == osl_File_E_None )
+        {
+            if ( osl::File::remove( pidfileURL ) != osl::FileBase::E_None )
+            {
+                SAL_WARN("desktop.app", "shutdown: cannot remove pidfile " << pidfileURL);
+            }
+        }
+        else
+        {
+            SAL_WARN("desktop.app", "shutdown: cannot get pidfile URL from path" << pidfileName);
+        }
+    }
+
+    // remove temp directory
+    RemoveTemporaryDirectory();
+    flatpak::removeTemporaryHtmlDirectory();
+
+    // flush evtl. configuration changes so that all config files in user
+    // dir are written
+    FlushConfiguration();
+
+    if (pExecGlobals->bRestartRequested)
+    {
+        // tdf#128523
+        RemoveIconCacheDirectory();
+
+        // a restart is already requested, usually due to a configuration change
+        // that needs a restart to get active. If this is the case, do not try
+        // to use SecureUserConfig to safe this still untested new configuration
+    }
+    else
+    {
+        // Test if SecureUserConfig is active. If yes and we are at this point, regular shutdown
+        // is in progress and the currently used configuration was working. Try to secure this
+        // working configuration for later eventually necessary restores
+        comphelper::BackupFileHelper aBackupFileHelper;
+
+        aBackupFileHelper.tryPush();
+        aBackupFileHelper.tryPushExtensionInfo();
+    }
+
+    // The acceptors in the AcceptorMap must be released (in DeregisterServices)
+    // with the solar mutex unlocked, to avoid deadlock:
+    {
+        SolarMutexReleaser aReleaser;
+        DeregisterServices();
+#if HAVE_FEATURE_SCRIPTING
+        StarBASIC::DetachAllDocBasicItems();
+#endif
+    }
+
+    // be sure that path/language options gets destroyed before
+    // UCB is deinitialized
+    pExecGlobals->pCTLLanguageOptions.reset();
+    pExecGlobals->pPathOptions.reset();
+
+    comphelper::ThreadPool::getSharedOptimalPool().shutdown();
+
+    bool bRR = pExecGlobals->bRestartRequested;
+    delete pExecGlobals;
+    pExecGlobals = nullptr;
+
+    if ( bRR )
+    {
+        restartOnMac(true);
+#if !ENABLE_WASM_STRIP_SPLASH
+        if ( m_rSplashScreen.is() )
+            m_rSplashScreen->reset();
+#endif
+
+        return EXITHELPER_NORMAL_RESTART;
+    }
+    return EXIT_SUCCESS;
+}
+
+IMPL_STATIC_LINK( Desktop, ImplInitFilterHdl, ::ConvertData&, rData, bool )
+{
+    return GraphicFilter::GetGraphicFilter().GetFilterCallback().Call( rData );
+}
+
+bool Desktop::InitializeConfiguration()
+{
+    try
+    {
+        css::configuration::theDefaultProvider::get(
+            comphelper::getProcessComponentContext() );
+        return true;
+    }
+    catch( css::lang::ServiceNotRegisteredException & e )
+    {
+        HandleBootstrapErrors(
+            Desktop::BE_UNO_SERVICE_CONFIG_MISSING, e.Message );
+    }
+    catch( const css::configuration::MissingBootstrapFileException& e )
+    {
+        OUString aMsg( CreateErrorMsgString( utl::Bootstrap::MISSING_BOOTSTRAP_FILE,
+                                                e.BootstrapFileURL ));
+        HandleBootstrapPathErrors( ::utl::Bootstrap::INVALID_USER_INSTALL, aMsg );
+    }
+    catch( const css::configuration::InvalidBootstrapFileException& e )
+    {
+        OUString aMsg( CreateErrorMsgString( utl::Bootstrap::INVALID_BOOTSTRAP_FILE_ENTRY,
+                                                e.BootstrapFileURL ));
+        HandleBootstrapPathErrors( ::utl::Bootstrap::INVALID_BASE_INSTALL, aMsg );
+    }
+    catch( const css::configuration::InstallationIncompleteException& )
+    {
+        OUString aVersionFileURL;
+        OUString aMsg;
+        utl::Bootstrap::PathStatus aPathStatus = utl::Bootstrap::locateVersionFile( aVersionFileURL );
+        if ( aPathStatus == utl::Bootstrap::PATH_EXISTS )
+            aMsg = CreateErrorMsgString( utl::Bootstrap::MISSING_VERSION_FILE_ENTRY, aVersionFileURL );
+        else
+            aMsg = CreateErrorMsgString( utl::Bootstrap::MISSING_VERSION_FILE, aVersionFileURL );
+
+        HandleBootstrapPathErrors( ::utl::Bootstrap::MISSING_USER_INSTALL, aMsg );
+    }
+    catch ( const css::configuration::backend::BackendAccessException& exception)
+    {
+        // [cm122549] It is assumed in this case that the message
+        // coming from InitConfiguration (in fact CreateApplicationConf...)
+        // is suitable for display directly.
+        FatalError( MakeStartupErrorMessage( exception.Message ) );
+    }
+    catch ( const css::configuration::backend::BackendSetupException& exception)
+    {
+        // [cm122549] It is assumed in this case that the message
+        // coming from InitConfiguration (in fact CreateApplicationConf...)
+        // is suitable for display directly.
+        FatalError( MakeStartupErrorMessage( exception.Message ) );
+    }
+    catch ( const css::configuration::CannotLoadConfigurationException& )
+    {
+        OUString aMsg( CreateErrorMsgString( utl::Bootstrap::INVALID_BOOTSTRAP_DATA,
+                                                OUString() ));
+        HandleBootstrapPathErrors( ::utl::Bootstrap::INVALID_BASE_INSTALL, aMsg );
+    }
+    catch( const css::uno::Exception& )
+    {
+        OUString aMsg( CreateErrorMsgString( utl::Bootstrap::INVALID_BOOTSTRAP_DATA,
+                                                OUString() ));
+        HandleBootstrapPathErrors( ::utl::Bootstrap::INVALID_BASE_INSTALL, aMsg );
+    }
+    return false;
+}
+
+void Desktop::FlushConfiguration()
+{
+    css::uno::Reference< css::util::XFlushable >(
+        css::configuration::theDefaultProvider::get(
+            comphelper::getProcessComponentContext()),
+        css::uno::UNO_QUERY_THROW)->flush();
+}
+
+bool Desktop::InitializeQuickstartMode( const Reference< XComponentContext >& rxContext )
+{
+    try
+    {
+        // the shutdown icon sits in the systray and allows the user to keep
+        // the office instance running for quicker restart
+        // this will only be activated if --quickstart was specified on cmdline
+
+        bool bQuickstart = shouldLaunchQuickstart();
+
+        // Try to instantiate quickstart service. This service is not mandatory, so
+        // do nothing if service is not available
+
+        // #i105753# the following if was invented for performance
+        // unfortunately this broke the Mac behavior which is to always run
+        // in quickstart mode since Mac applications do not usually quit
+        // when the last document closes.
+        // Note that this claim that on macOS we "always run in quickstart mode"
+        // has nothing to do with (quick) *starting* (i.e. starting automatically
+        // when the user logs in), though, but with not quitting when no documents
+        // are open.
+        #ifndef MACOSX
+        if ( bQuickstart )
+        #endif
+        {
+            css::office::Quickstart::createStart(rxContext, bQuickstart);
+        }
+        return true;
+    }
+    catch( const css::uno::Exception& )
+    {
+        return false;
+    }
+}
+
+void Desktop::OverrideSystemSettings( AllSettings& rSettings )
+{
+    if ( !SvtTabAppearanceCfg::IsInitialized () )
+        return;
+
+    StyleSettings hStyleSettings   = rSettings.GetStyleSettings();
+    MouseSettings hMouseSettings = rSettings.GetMouseSettings();
+
+    DragFullOptions nDragFullOptions = hStyleSettings.GetDragFullOptions();
+
+    SvtTabAppearanceCfg aAppearanceCfg;
+    DragMode nDragMode = aAppearanceCfg.GetDragMode();
+    switch ( nDragMode )
+    {
+    case DragMode::FullWindow:
+        nDragFullOptions |= DragFullOptions::All;
+        break;
+    case DragMode::Frame:
+        nDragFullOptions &= ~DragFullOptions::All;
+        break;
+    case DragMode::SystemDep:
+    default:
+        break;
+    }
+
+    MouseFollowFlags nFollow = hMouseSettings.GetFollow();
+    hMouseSettings.SetFollow( aAppearanceCfg.IsMenuMouseFollow() ? (nFollow|MouseFollowFlags::Menu) : (nFollow&~MouseFollowFlags::Menu));
+    rSettings.SetMouseSettings(hMouseSettings);
+
+    bool bMenuIcons = officecfg::Office::Common::View::Menu::ShowIconsInMenues::get();
+    bool bSystemMenuIcons = officecfg::Office::Common::View::Menu::IsSystemIconsInMenus::get();
+    TriState eMenuIcons = bSystemMenuIcons ? TRISTATE_INDET : static_cast<TriState>(bMenuIcons);
+    hStyleSettings.SetUseImagesInMenus(eMenuIcons);
+    hStyleSettings.SetContextMenuShortcuts(static_cast<TriState>(officecfg::Office::Common::View::Menu::ShortcutsInContextMenus::get()));
+    hStyleSettings.SetDragFullOptions( nDragFullOptions );
+    rSettings.SetStyleSettings ( hStyleSettings );
+}
+
+namespace {
+
+class ExitTimer : public Timer
+{
+  public:
+    ExitTimer() : Timer("desktop ExitTimer")
+    {
+        SetTimeout(500);
+        Start();
+    }
+    virtual void Invoke() override
+    {
+        _exit(42);
+    }
+};
+
+}
+
+IMPL_LINK_NOARG(Desktop, OpenClients_Impl, void*, void)
+{
+    // #i114963#
+    // Enable IPC thread before OpenClients
+    //
+    // This is because it is possible for another client to connect during the OpenClients() call.
+    // This can happen on Windows when document is printed (not opened) and another client wants to print (when printing multiple documents).
+    // If the IPC thread is enabled after OpenClients, then the client will not be processed because the application will exit after printing. i.e RequestHandler::AreRequestsPending() will always return false
+    //
+    // ALSO:
+    //
+    // Multiple clients may request simultaneous connections.
+    // When this server closes down it attempts to recreate the pipe (in RequestHandler::Disable()).
+    // It's possible that the client has a pending connection request.
+    // When the IPC thread is not running, this connection locks (because maPipe.accept()) is never called
+    RequestHandler::SetReady(true);
+    OpenClients();
+
+    CloseSplashScreen();
+    CheckFirstRun( );
+#ifdef _WIN32
+    bool bDontShowDialogs
+        = Application::IsHeadlessModeEnabled(); // uitest.uicheck fails when the dialog is open
+    for (sal_uInt16 i = 0; !bDontShowDialogs && i < Application::GetCommandLineParamCount(); i++)
+    {
+        if (Application::GetCommandLineParam(i) == "--nologo")
+            bDontShowDialogs = true;
+    }
+    if (!bDontShowDialogs)
+        vcl::fileregistration::CheckFileExtRegistration(SfxGetpApp()->GetTopWindow());
+    // Registers a COM class factory of the service manager with the windows operating system.
+    Reference< XMultiServiceFactory > xSMgr=  comphelper::getProcessServiceFactory();
+    xSMgr->createInstance("com.sun.star.bridge.OleApplicationRegistration");
+    xSMgr->createInstance("com.sun.star.comp.ole.EmbedServer");
+#endif
+    const char *pExitPostStartup = getenv ("OOO_EXIT_POST_STARTUP");
+    if (pExitPostStartup && *pExitPostStartup)
+        new ExitTimer();
+}
+
+void Desktop::OpenClients()
+{
+
+    const CommandLineArgs& rArgs = GetCommandLineArgs();
+
+    if (!rArgs.IsQuickstart())
+    {
+        OUString aHelpModule;
+        if (rArgs.IsHelpWriter()) {
+            aHelpModule = "swriter";
+        } else if (rArgs.IsHelpCalc()) {
+            aHelpModule = "scalc";
+        } else if (rArgs.IsHelpDraw()) {
+            aHelpModule = "sdraw";
+        } else if (rArgs.IsHelpImpress()) {
+            aHelpModule = "simpress";
+        } else if (rArgs.IsHelpBase()) {
+            aHelpModule = "sdatabase";
+        } else if (rArgs.IsHelpBasic()) {
+            aHelpModule = "sbasic";
+        } else if (rArgs.IsHelpMath()) {
+            aHelpModule = "smath";
+        }
+        if (!aHelpModule.isEmpty()) {
+            OUString aHelpURL = "vnd.sun.star.help://"
+                              + aHelpModule
+                              + "/start?Language="
+                              + utl::ConfigManager::getUILocale();
+#if defined UNX
+            aHelpURL += "&System=UNX";
+#elif defined _WIN32
+            aHelpURL += "&System=WIN";
+#endif
+            Application::GetHelp()->Start(aHelpURL);
+            return;
+        }
+    }
+
+    // Disable AutoSave feature in case "--norestore" or a similar command line switch is set on the command line.
+    // The reason behind: AutoSave/EmergencySave/AutoRecovery share the same data.
+    // But the require that all documents, which are saved as backup should exists inside
+    // memory. May be this mechanism will be inconsistent if the configuration exists...
+    // but no document inside memory corresponds to this data.
+    // Further it's not acceptable to recover such documents without any UI. It can
+    // need some time, where the user won't see any results and wait for finishing the office startup...
+    bool bAllowRecoveryAndSessionManagement = ( !rArgs.IsNoRestore() ) && ( !rArgs.IsHeadless()  );
+
+#if !defined ANDROID
+    // Enter safe mode if requested
+    if (Application::IsSafeModeEnabled()) {
+        handleSafeMode();
+    }
+#endif
+
+#if HAVE_FEATURE_BREAKPAD
+    if (officecfg::Office::Common::Misc::CrashReport::get() && CrashReporter::crashReportInfoExists())
+        handleCrashReport();
+#endif
+
+    if ( ! bAllowRecoveryAndSessionManagement )
+    {
+        try
+        {
+            Reference< XDispatch > xRecovery = css::frame::theAutoRecovery::get( ::comphelper::getProcessComponentContext() );
+            Reference< css::util::XURLTransformer > xParser = css::util::URLTransformer::create( ::comphelper::getProcessComponentContext() );
+
+            css::util::URL aCmd;
+            aCmd.Complete = "vnd.sun.star.autorecovery:/disableRecovery";
+            xParser->parseStrict(aCmd);
+
+            xRecovery->dispatch(aCmd, css::uno::Sequence< css::beans::PropertyValue >());
+        }
+        catch(const css::uno::Exception&)
+        {
+            TOOLS_WARN_EXCEPTION( "desktop.app", "Could not disable AutoRecovery.");
+        }
+    }
+    else
+    {
+        bool bExistsRecoveryData = false;
+#if !ENABLE_WASM_STRIP_RECOVERYUI
+        bool bCrashed            = false;
+        bool bExistsSessionData  = false;
+        bool const bDisableRecovery
+            = getenv("OOO_DISABLE_RECOVERY") != nullptr
+              || IsOnSystemEventLoop()
+              || !officecfg::Office::Recovery::RecoveryInfo::Enabled::get();
+
+        impl_checkRecoveryState(bCrashed, bExistsRecoveryData, bExistsSessionData);
+
+        if ( !bDisableRecovery &&
+            (
+                bExistsRecoveryData || // => crash with files    => recovery
+                bCrashed               // => crash without files => error report
+            )
+           )
+        {
+            try
+            {
+                impl_callRecoveryUI(
+                    false          , // false => force recovery instead of emergency save
+                    bExistsRecoveryData);
+            }
+            catch(const css::uno::Exception&)
+            {
+                TOOLS_WARN_EXCEPTION( "desktop.app", "Error during recovery");
+            }
+        }
+#endif
+
+        Reference< XSessionManagerListener2 > xSessionListener;
+        try
+        {
+            // specifies whether the UI-interaction on Session shutdown is allowed
+            bool bUIOnSessionShutdownAllowed = officecfg::Office::Recovery::SessionShutdown::DocumentStoreUIEnabled::get();
+            xSessionListener = SessionListener::createWithOnQuitFlag(
+                    ::comphelper::getProcessComponentContext(), bUIOnSessionShutdownAllowed);
+        }
+        catch(const css::uno::Exception&)
+        {
+            TOOLS_WARN_EXCEPTION( "desktop.app", "Registration of session listener failed");
+        }
+
+        if ( !bExistsRecoveryData && xSessionListener.is() )
+        {
+            // session management
+            try
+            {
+                xSessionListener->doRestore();
+            }
+            catch(const css::uno::Exception&)
+            {
+                TOOLS_WARN_EXCEPTION( "desktop.app", "Error in session management");
+            }
+        }
+    }
+
+    // write this information here to avoid depending on vcl in the crash reporter lib
+    CrashReporter::addKeyValue("Language", Application::GetSettings().GetLanguageTag().getBcp47(), CrashReporter::Create);
+
+    RequestHandler::EnableRequests();
+
+    ProcessDocumentsRequest aRequest(rArgs.getCwdUrl());
+    aRequest.aOpenList = rArgs.GetOpenList();
+    aRequest.aViewList = rArgs.GetViewList();
+    aRequest.aStartList = rArgs.GetStartList();
+    aRequest.aPrintList = rArgs.GetPrintList();
+    aRequest.aPrintToList = rArgs.GetPrintToList();
+    aRequest.aPrinterName = rArgs.GetPrinterName();
+    aRequest.aForceOpenList = rArgs.GetForceOpenList();
+    aRequest.aForceNewList = rArgs.GetForceNewList();
+    aRequest.aConversionList = rArgs.GetConversionList();
+    aRequest.aConversionParams = rArgs.GetConversionParams();
+    aRequest.aConversionOut = rArgs.GetConversionOut();
+    aRequest.aImageConversionType = rArgs.GetImageConversionType();
+    aRequest.aInFilter = rArgs.GetInFilter();
+    aRequest.bTextCat = rArgs.IsTextCat();
+    aRequest.bScriptCat = rArgs.IsScriptCat();
+
+    if ( !aRequest.aOpenList.empty() ||
+         !aRequest.aViewList.empty() ||
+         !aRequest.aStartList.empty() ||
+         !aRequest.aPrintList.empty() ||
+         !aRequest.aForceOpenList.empty() ||
+         !aRequest.aForceNewList.empty() ||
+         ( !aRequest.aPrintToList.empty() && !aRequest.aPrinterName.isEmpty() ) ||
+         !aRequest.aConversionList.empty() )
+    {
+        if ( rArgs.HasModuleParam() )
+        {
+            SvtModuleOptions    aOpt;
+
+            // Support command line parameters to start a module (as preselection)
+            if ( rArgs.IsWriter() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::WRITER ) )
+                aRequest.aModule = aOpt.GetFactoryName( SvtModuleOptions::EFactory::WRITER );
+            else if ( rArgs.IsCalc() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::CALC ) )
+                aRequest.aModule = aOpt.GetFactoryName( SvtModuleOptions::EFactory::CALC );
+            else if ( rArgs.IsImpress() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::IMPRESS ) )
+                aRequest.aModule= aOpt.GetFactoryName( SvtModuleOptions::EFactory::IMPRESS );
+            else if ( rArgs.IsDraw() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::DRAW ) )
+                aRequest.aModule= aOpt.GetFactoryName( SvtModuleOptions::EFactory::DRAW );
+        }
+
+        // check for printing disabled
+        if( ( !(aRequest.aPrintList.empty() && aRequest.aPrintToList.empty()) )
+            && Application::GetSettings().GetMiscSettings().GetDisablePrinting() )
+        {
+            aRequest.aPrintList.clear();
+            aRequest.aPrintToList.clear();
+            std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(nullptr,
+                                                      VclMessageType::Warning, VclButtonsType::Ok,
+                                                      DpResId(STR_ERR_PRINTDISABLED)));
+            xBox->run();
+        }
+
+        // Process request
+        if ( RequestHandler::ExecuteCmdLineRequests(aRequest, false) )
+        {
+            // Don't do anything if we have successfully called terminate at desktop:
+            return;
+        }
+    }
+
+    // no default document if a document was loaded by recovery or by command line or if soffice is used as server
+    Reference< XDesktop2 > xDesktop = css::frame::Desktop::create( ::comphelper::getProcessComponentContext() );
+    Reference< XElementAccess > xList( xDesktop->getFrames(), UNO_QUERY_THROW );
+    if ( xList->hasElements() )
+        return;
+
+    if ( rArgs.IsQuickstart() || rArgs.IsInvisible() || Application::AnyInput( VclInputFlags::APPEVENT ) )
+        // soffice was started as tray icon ...
+        return;
+
+    OpenDefault();
+}
+
+void Desktop::OpenDefault()
+{
+    OUString        aName;
+    SvtModuleOptions    aOpt;
+
+    const CommandLineArgs& rArgs = GetCommandLineArgs();
+    if ( rArgs.IsNoDefault() ) return;
+    if ( rArgs.HasModuleParam() )
+    {
+        // Support new command line parameters to start a module
+        if ( rArgs.IsWriter() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::WRITER ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::WRITER );
+        else if ( rArgs.IsCalc() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::CALC ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::CALC );
+        else if ( rArgs.IsImpress() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::IMPRESS ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::IMPRESS );
+        else if ( rArgs.IsBase() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::DATABASE ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::DATABASE );
+        else if ( rArgs.IsDraw() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::DRAW ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::DRAW );
+        else if ( rArgs.IsMath() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::MATH ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::MATH );
+        else if ( rArgs.IsGlobal() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::WRITER ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::WRITERGLOBAL );
+        else if ( rArgs.IsWeb() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::WRITER ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::WRITERWEB );
+    }
+
+    if ( aName.isEmpty() )
+    {
+        if (aOpt.IsModuleInstalled(SvtModuleOptions::EModule::STARTMODULE))
+        {
+            ShowBackingComponent(nullptr);
+            return;
+        }
+
+        // Old way to create a default document
+        if ( aOpt.IsModuleInstalled( SvtModuleOptions::EModule::WRITER ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::WRITER );
+        else if ( aOpt.IsModuleInstalled( SvtModuleOptions::EModule::CALC ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::CALC );
+        else if ( aOpt.IsModuleInstalled( SvtModuleOptions::EModule::IMPRESS ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::IMPRESS );
+        else if ( aOpt.IsModuleInstalled( SvtModuleOptions::EModule::DATABASE ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::DATABASE );
+        else if ( aOpt.IsModuleInstalled( SvtModuleOptions::EModule::DRAW ) )
+            aName = aOpt.GetFactoryEmptyDocumentURL( SvtModuleOptions::EFactory::DRAW );
+        else
+            return;
+    }
+
+    ProcessDocumentsRequest aRequest(rArgs.getCwdUrl());
+    aRequest.aOpenList.push_back(aName);
+    RequestHandler::ExecuteCmdLineRequests(aRequest, false);
+}
+
+
+OUString GetURL_Impl(
+    const OUString& rName, std::optional< OUString > const & cwdUrl )
+{
+    // if rName is a vnd.sun.star.script URL do not attempt to parse it
+    // as INetURLObj does not handle URLs there
+    if (rName.startsWith("vnd.sun.star.script"))
+    {
+        return rName;
+    }
+
+    // don't touch file urls, those should already be in internal form
+    // they won't get better here (#112849#)
+    if (comphelper::isFileUrl(rName))
+    {
+        return rName;
+    }
+
+    if ( rName.startsWith("service:"))
+    {
+        return rName;
+    }
+
+    // Add path separator to these directory and make given URL (rName) absolute by using of current working directory
+    // Attention: "setFinalSlash()" is necessary for calling "smartRel2Abs()"!!!
+    // Otherwise last part will be ignored and wrong result will be returned!!!
+    // "smartRel2Abs()" interpret given URL as file not as path. So he truncate last element to get the base path ...
+    // But if we add a separator - he doesn't do it anymore.
+    INetURLObject aObj;
+    if (cwdUrl) {
+        aObj.SetURL(*cwdUrl);
+        aObj.setFinalSlash();
+    }
+
+    // Use the provided parameters for smartRel2Abs to support the usage of '%' in system paths.
+    // Otherwise this char won't get encoded and we are not able to load such files later,
+    bool bWasAbsolute;
+    INetURLObject aURL     = aObj.smartRel2Abs( rName, bWasAbsolute, false, INetURLObject::EncodeMechanism::WasEncoded,
+                                                RTL_TEXTENCODING_UTF8, true );
+    OUString      aFileURL = aURL.GetMainURL(INetURLObject::DecodeMechanism::NONE);
+
+    ::osl::FileStatus aStatus( osl_FileStatus_Mask_FileURL );
+    ::osl::DirectoryItem aItem;
+    if( ::osl::FileBase::E_None == ::osl::DirectoryItem::get( aFileURL, aItem ) &&
+        ::osl::FileBase::E_None == aItem.getFileStatus( aStatus ) )
+            aFileURL = aStatus.getFileURL();
+
+    return aFileURL;
+}
+
+void Desktop::HandleAppEvent( const ApplicationEvent& rAppEvent )
+{
+    switch ( rAppEvent.GetEvent() )
+    {
+    case ApplicationEvent::Type::Accept:
+        // every time an accept parameter is used we create an acceptor
+        // with the corresponding accept-string
+        createAcceptor(rAppEvent.GetStringData());
+        break;
+    case ApplicationEvent::Type::Appear:
+        if ( !GetCommandLineArgs().IsInvisible() && !impl_bringToFrontRecoveryUI() )
+        {
+            Reference< css::uno::XComponentContext > xContext = ::comphelper::getProcessComponentContext();
+
+            // find active task - the active task is always a visible task
+            Reference< css::frame::XDesktop2 > xDesktop = css::frame::Desktop::create( xContext );
+            Reference< css::frame::XFrame > xTask = xDesktop->getActiveFrame();
+            if ( !xTask.is() )
+            {
+                // get any task if there is no active one
+                Reference< css::container::XIndexAccess > xList = xDesktop->getFrames();
+                if ( xList->getCount() > 0 )
+                    xList->getByIndex(0) >>= xTask;
+            }
+
+            if ( xTask.is() )
+            {
+                Reference< css::awt::XTopWindow > xTop( xTask->getContainerWindow(), UNO_QUERY );
+                xTop->toFront();
+            }
+            else
+            {
+                // no visible task that could be activated found
+                Reference< css::awt::XWindow > xContainerWindow;
+                Reference< XFrame > xBackingFrame = xDesktop->findFrame( "_blank", 0);
+                if (xBackingFrame.is())
+                    xContainerWindow = xBackingFrame->getContainerWindow();
+                if (xContainerWindow.is())
+                {
+                    Reference< XController > xStartModule = StartModule::createWithParentWindow(xContext, xContainerWindow);
+                    Reference< css::awt::XWindow > xBackingWin(xStartModule, UNO_QUERY);
+                    // Attention: You MUST(!) call setComponent() before you call attachFrame().
+                    // Because the backing component set the property "IsBackingMode" of the frame
+                    // to true inside attachFrame(). But setComponent() reset this state every time ...
+                    xBackingFrame->setComponent(xBackingWin, xStartModule);
+                    xStartModule->attachFrame(xBackingFrame);
+                    xContainerWindow->setVisible(true);
+
+                    VclPtr<vcl::Window> pCompWindow = VCLUnoHelper::GetWindow(xBackingFrame->getComponentWindow());
+                    if (pCompWindow)
+                        pCompWindow->PaintImmediately();
+                }
+            }
+        }
+        break;
+    case ApplicationEvent::Type::Open:
+        {
+            const CommandLineArgs& rCmdLine = GetCommandLineArgs();
+            if ( !rCmdLine.IsInvisible() && !rCmdLine.IsTerminateAfterInit() )
+            {
+                ProcessDocumentsRequest docsRequest(rCmdLine.getCwdUrl());
+                std::vector<OUString> const & data(rAppEvent.GetStringsData());
+                docsRequest.aOpenList.insert(
+                    docsRequest.aOpenList.end(), data.begin(), data.end());
+                RequestHandler::ExecuteCmdLineRequests(docsRequest, false);
+            }
+        }
+        break;
+    case ApplicationEvent::Type::OpenHelpUrl:
+        // start help for a specific URL
+        Application::GetHelp()->Start(rAppEvent.GetStringData());
+        break;
+    case ApplicationEvent::Type::Print:
+        {
+            const CommandLineArgs& rCmdLine = GetCommandLineArgs();
+            if ( !rCmdLine.IsInvisible() && !rCmdLine.IsTerminateAfterInit() )
+            {
+                ProcessDocumentsRequest docsRequest(rCmdLine.getCwdUrl());
+                std::vector<OUString> const & data(rAppEvent.GetStringsData());
+                docsRequest.aPrintList.insert(
+                    docsRequest.aPrintList.end(), data.begin(), data.end());
+                RequestHandler::ExecuteCmdLineRequests(docsRequest, false);
+            }
+        }
+        break;
+    case ApplicationEvent::Type::PrivateDoShutdown:
+        {
+            Desktop* pD = dynamic_cast<Desktop*>(GetpApp());
+            OSL_ENSURE( pD, "no desktop ?!?" );
+            if( pD )
+                pD->doShutdown();
+        }
+        break;
+    case ApplicationEvent::Type::QuickStart:
+        if ( !GetCommandLineArgs().IsInvisible()  )
+        {
+            // If the office has been started the second time its command line arguments are sent through a pipe
+            // connection to the first office. We want to reuse the quickstart option for the first office.
+            // NOTICE: The quickstart service must be initialized inside the "main thread", so we use the
+            // application events to do this (they are executed inside main thread)!!!
+            // Don't start quickstart service if the user specified "--invisible" on the command line!
+            Reference< css::uno::XComponentContext > xContext = ::comphelper::getProcessComponentContext();
+            css::office::Quickstart::createStart(xContext, true/*Quickstart*/);
+        }
+        break;
+    case ApplicationEvent::Type::ShowDialog:
+        // This is only used on macOS, and only for About or Preferences.
+        // Ignore all errors here. It's clicking a menu entry only ...
+        // The user will try it again, in case nothing happens .-)
+        try
+        {
+            Reference< css::uno::XComponentContext > xContext = ::comphelper::getProcessComponentContext();
+
+            Reference< css::frame::XDesktop2 > xDesktop = css::frame::Desktop::create( xContext );
+
+            Reference< css::util::XURLTransformer > xParser = css::util::URLTransformer::create(xContext);
+            css::util::URL aCommand;
+            if( rAppEvent.GetStringData() == "PREFERENCES" )
+                aCommand.Complete = ".uno:OptionsTreeDialog";
+            else if( rAppEvent.GetStringData() == "ABOUT" )
+                aCommand.Complete = ".uno:About";
+            if( !aCommand.Complete.isEmpty() )
+            {
+                xParser->parseStrict(aCommand);
+
+                css::uno::Reference< css::frame::XDispatch > xDispatch = xDesktop->queryDispatch(aCommand, OUString(), 0);
+                if (xDispatch.is())
+                    xDispatch->dispatch(aCommand, css::uno::Sequence< css::beans::PropertyValue >());
+            }
+        }
+        catch(const css::uno::Exception&)
+        {
+            TOOLS_WARN_EXCEPTION("desktop.app", "exception thrown by dialog");
+        }
+        break;
+    case ApplicationEvent::Type::Unaccept:
+        // try to remove corresponding acceptor
+        destroyAcceptor(rAppEvent.GetStringData());
+        break;
+    default:
+        SAL_WARN( "desktop.app", "this cannot happen");
+        break;
+    }
+}
+
+#if !ENABLE_WASM_STRIP_SPLASH
+void Desktop::OpenSplashScreen()
+{
+    const CommandLineArgs &rCmdLine = GetCommandLineArgs();
+    // Show intro only if this is normal start (e.g. no server, no quickstart, no printing )
+    if ( !(!rCmdLine.IsInvisible() &&
+         !rCmdLine.IsHeadless() &&
+         !rCmdLine.IsQuickstart() &&
+         !rCmdLine.IsMinimized() &&
+         !rCmdLine.IsNoLogo() &&
+         !rCmdLine.IsTerminateAfterInit() &&
+         rCmdLine.GetPrintList().empty() &&
+         rCmdLine.GetPrintToList().empty() &&
+         rCmdLine.GetConversionList().empty()) )
+        return;
+
+    // Determine application name from command line parameters
+    OUString aAppName;
+    if ( rCmdLine.IsWriter() )
+        aAppName = "writer";
+    else if ( rCmdLine.IsCalc() )
+        aAppName = "calc";
+    else if ( rCmdLine.IsDraw() )
+        aAppName = "draw";
+    else if ( rCmdLine.IsImpress() )
+        aAppName = "impress";
+    else if ( rCmdLine.IsBase() )
+        aAppName = "base";
+    else if ( rCmdLine.IsGlobal() )
+        aAppName = "global";
+    else if ( rCmdLine.IsMath() )
+        aAppName = "math";
+    else if ( rCmdLine.IsWeb() )
+        aAppName = "web";
+
+    // Which splash to use
+    OUString aSplashService( "com.sun.star.office.SplashScreen" );
+    if ( rCmdLine.HasSplashPipe() )
+        aSplashService = "com.sun.star.office.PipeSplashScreen";
+
+    Sequence< Any > aSeq{ Any(true) /* bVisible */, Any(aAppName) };
+    css::uno::Reference< css::uno::XComponentContext > xContext = ::comphelper::getProcessComponentContext();
+    m_rSplashScreen.set(
+        xContext->getServiceManager()->createInstanceWithArgumentsAndContext(aSplashService, aSeq, xContext),
+        UNO_QUERY);
+
+    if(m_rSplashScreen.is())
+            m_rSplashScreen->start("SplashScreen", 100);
+
+}
+#endif
+
+void Desktop::SetSplashScreenProgress(sal_Int32 iProgress)
+{
+#if ENABLE_WASM_STRIP_SPLASH
+    (void) iProgress;
+#else
+    if(m_rSplashScreen.is())
+    {
+        m_rSplashScreen->setValue(iProgress);
+    }
+#endif
+}
+
+void Desktop::SetSplashScreenText( const OUString& rText )
+{
+#if ENABLE_WASM_STRIP_SPLASH
+    (void) rText;
+#else
+    if( m_rSplashScreen.is() )
+    {
+        m_rSplashScreen->setText( rText );
+    }
+#endif
+}
+
+void Desktop::CloseSplashScreen()
+{
+#if !ENABLE_WASM_STRIP_SPLASH
+    if(m_rSplashScreen.is())
+    {
+        SolarMutexGuard ensureSolarMutex;
+        m_rSplashScreen->end();
+        m_rSplashScreen = nullptr;
+    }
+#endif
+}
+
+
+IMPL_STATIC_LINK_NOARG(Desktop, AsyncInitFirstRun, Timer *, void)
+{
+    // does initializations which are necessary for the first run of the office
+    try
+    {
+        Reference< XJobExecutor > xExecutor = theJobExecutor::get( ::comphelper::getProcessComponentContext() );
+        xExecutor->trigger( "onFirstRunInitialization" );
+    }
+    catch(const css::uno::Exception&)
+    {
+        TOOLS_WARN_EXCEPTION( "desktop.app", "Desktop::DoFirstRunInitializations: caught an exception while trigger job executor" );
+    }
+}
+
+void Desktop::ShowBackingComponent(Desktop * progress)
+{
+    if (GetCommandLineArgs().IsNoDefault())
+    {
+        return;
+    }
+    Reference< XComponentContext > xContext = comphelper::getProcessComponentContext();
+    Reference< XDesktop2 > xDesktop = css::frame::Desktop::create(xContext);
+    if (progress != nullptr)
+    {
+        progress->SetSplashScreenProgress(60);
+    }
+    Reference< XFrame > xBackingFrame = xDesktop->findFrame( "_blank", 0);
+    Reference< css::awt::XWindow > xContainerWindow;
+
+    if (xBackingFrame.is())
+        xContainerWindow = xBackingFrame->getContainerWindow();
+    if (!xContainerWindow.is())
+        return;
+
+    // set the WindowExtendedStyle::Document style. Normally, this is done by the TaskCreator service when a "_blank"
+    // frame/window is created. Since we do not use the TaskCreator here, we need to mimic its behavior,
+    // otherwise documents loaded into this frame will later on miss functionality depending on the style.
+    VclPtr<vcl::Window> pContainerWindow = VCLUnoHelper::GetWindow( xContainerWindow );
+    SAL_WARN_IF( !pContainerWindow, "desktop.app", "Desktop::Main: no implementation access to the frame's container window!" );
+    pContainerWindow->SetExtendedStyle( pContainerWindow->GetExtendedStyle() | WindowExtendedStyle::Document );
+    if (progress != nullptr)
+    {
+        progress->SetSplashScreenProgress(75);
+    }
+
+    Reference< XController > xStartModule = StartModule::createWithParentWindow( xContext, xContainerWindow);
+    // Attention: You MUST(!) call setComponent() before you call attachFrame().
+    // Because the backing component set the property "IsBackingMode" of the frame
+    // to true inside attachFrame(). But setComponent() reset this state everytimes ...
+    xBackingFrame->setComponent(Reference< XWindow >(xStartModule, UNO_QUERY), xStartModule);
+    if (progress != nullptr)
+    {
+        progress->SetSplashScreenProgress(100);
+    }
+    xStartModule->attachFrame(xBackingFrame);
+    if (progress != nullptr)
+    {
+        progress->CloseSplashScreen();
+    }
+    xContainerWindow->setVisible(true);
+}
+
+
+void Desktop::CheckFirstRun( )
+{
+    if (!officecfg::Office::Common::Misc::FirstRun::get())
+        return;
+
+    // use VCL timer, which won't trigger during shutdown if the
+    // application exits before timeout
+    m_firstRunTimer.Start();
+
+#ifdef _WIN32
+    // Check if Quickstarter should be started (on Windows only)
+    OUString sRootKey = ReplaceStringHookProc("Software\\%OOOVENDOR\\%PRODUCTNAME\\%PRODUCTVERSION");
+    WCHAR szValue[8192];
+    DWORD nValueSize = sizeof(szValue);
+    HKEY hKey;
+    if (ERROR_SUCCESS == RegOpenKeyW(HKEY_LOCAL_MACHINE, o3tl::toW(sRootKey.getStr()), &hKey))
+    {
+        if ( ERROR_SUCCESS == RegQueryValueExW( hKey, L"RunQuickstartAtFirstStart", nullptr, nullptr, reinterpret_cast<LPBYTE>(szValue), &nValueSize ) )
+        {
+            css::uno::Reference< css::uno::XComponentContext > xContext = ::comphelper::getProcessComponentContext();
+            css::office::Quickstart::createAutoStart(xContext, true/*Quickstart*/, true/*bAutostart*/);
+            RegCloseKey( hKey );
+        }
+    }
+#endif
+
+    std::shared_ptr< comphelper::ConfigurationChanges > batch(
+        comphelper::ConfigurationChanges::create());
+    officecfg::Office::Common::Misc::FirstRun::set(false, batch);
+    batch->commit();
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/appinit.cxx b/desktop/source/app/appinit.cxx
new file mode 100644
index 000000000..a70004e23
--- /dev/null
+++ b/desktop/source/app/appinit.cxx
@@ -0,0 +1,277 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <algorithm>
+
+#include <app.hxx>
+#include <dp_shared.hxx>
+#include "cmdlineargs.hxx"
+#include <strings.hrc>
+#include <com/sun/star/registry/XSimpleRegistry.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/uno/Exception.hpp>
+#include <com/sun/star/ucb/UniversalContentBroker.hpp>
+#include <cppuhelper/bootstrap.hxx>
+#include <officecfg/Setup.hxx>
+#include <osl/file.hxx>
+#include <rtl/bootstrap.hxx>
+#include <sal/log.hxx>
+#include <tools/diagnose_ex.h>
+
+#include <comphelper/processfactory.hxx>
+#include <unotools/ucbhelper.hxx>
+#include <unotools/tempfile.hxx>
+#include <vcl/svapp.hxx>
+#include <unotools/pathoptions.hxx>
+#include <map>
+
+using namespace desktop;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::beans;
+using namespace ::com::sun::star::registry;
+using namespace ::com::sun::star::ucb;
+
+namespace desktop
+{
+
+
+static void configureUcb()
+{
+    // For backwards compatibility, in case some code still uses plain
+    // createInstance w/o args directly to obtain an instance:
+    UniversalContentBroker::create(comphelper::getProcessComponentContext());
+}
+
+void Desktop::InitApplicationServiceManager()
+{
+    Reference<XMultiServiceFactory> sm;
+#ifdef ANDROID
+    OUString aUnoRc( "file:///assets/program/unorc" );
+    sm.set(
+        cppu::defaultBootstrap_InitialComponentContext( aUnoRc )->getServiceManager(),
+        UNO_QUERY_THROW);
+#elif defined(IOS)
+    OUString uri( "$APP_DATA_DIR" );
+    rtl_bootstrap_expandMacros( &uri.pData );
+    OUString aUnoRc("file://" + uri  + "/unorc");
+    sm.set(
+           cppu::defaultBootstrap_InitialComponentContext( aUnoRc )->getServiceManager(),
+           UNO_QUERY_THROW);
+#else
+    sm.set(
+        cppu::defaultBootstrap_InitialComponentContext()->getServiceManager(),
+        UNO_QUERY_THROW);
+#endif
+    comphelper::setProcessServiceFactory(sm);
+}
+
+void Desktop::RegisterServices()
+{
+    if( m_bServicesRegistered )
+        return;
+
+    // interpret command line arguments
+    CommandLineArgs& rCmdLine = GetCommandLineArgs();
+
+    // Headless mode for FAT Office, auto cancels any dialogs that popup
+    if (rCmdLine.IsEventTesting())
+        Application::EnableEventTestingMode();
+    else if (rCmdLine.IsHeadless())
+        Application::EnableHeadlessMode(false);
+
+    // read accept string from configuration
+    OUString conDcpCfg(
+        officecfg::Setup::Office::ooSetupConnectionURL::get());
+    if (!conDcpCfg.isEmpty()) {
+        createAcceptor(conDcpCfg);
+    }
+
+    std::vector< OUString > const & conDcp = rCmdLine.GetAccept();
+    for (auto const& elem : conDcp)
+    {
+        createAcceptor(elem);
+    }
+
+    configureUcb();
+
+    CreateTemporaryDirectory();
+    m_bServicesRegistered = true;
+}
+
+typedef std::map< OUString, css::uno::Reference<css::lang::XInitialization> > AcceptorMap;
+
+namespace
+{
+    AcceptorMap& acceptorMap()
+    {
+        static AcceptorMap SINGLETON;
+        return SINGLETON;
+    }
+    OUString& CurrentTempURL()
+    {
+        static OUString SINGLETON;
+        return SINGLETON;
+    }
+}
+
+static bool bAccept = false;
+
+void Desktop::createAcceptor(const OUString& aAcceptString)
+{
+    // check whether the requested acceptor already exists
+    AcceptorMap &rMap = acceptorMap();
+    AcceptorMap::const_iterator pIter = rMap.find(aAcceptString);
+    if (pIter != rMap.end() )
+        return;
+
+    Sequence< Any > aSeq{ Any(aAcceptString), Any(bAccept) };
+    Reference< XComponentContext > xContext = ::comphelper::getProcessComponentContext();
+    Reference<XInitialization> rAcceptor(
+        xContext->getServiceManager()->createInstanceWithContext("com.sun.star.office.Acceptor", xContext),
+        UNO_QUERY );
+    if ( rAcceptor.is() )
+    {
+        try
+        {
+            rAcceptor->initialize( aSeq );
+            rMap.emplace(aAcceptString, rAcceptor);
+        }
+        catch (const css::uno::Exception&)
+        {
+            // no error handling needed...
+            // acceptor just won't come up
+            TOOLS_WARN_EXCEPTION( "desktop.app", "Acceptor could not be created");
+        }
+    }
+    else
+    {
+        // there is already an acceptor with this description
+        SAL_WARN( "desktop.app", "Acceptor already exists.");
+    }
+}
+
+namespace {
+
+class enable
+{
+    private:
+    Sequence<Any> m_aSeq{ Any(true) };
+    public:
+    enable() = default;
+    void operator() (const AcceptorMap::value_type& val) {
+        if (val.second.is()) {
+            val.second->initialize(m_aSeq);
+        }
+    }
+};
+
+}
+
+// enable acceptors
+IMPL_STATIC_LINK_NOARG(Desktop, EnableAcceptors_Impl, void*, void)
+{
+    if (!bAccept)
+    {
+        // from now on, all new acceptors are enabled
+        bAccept = true;
+        // enable existing acceptors by calling initialize(true)
+        // on all existing acceptors
+        AcceptorMap &rMap = acceptorMap();
+        std::for_each(rMap.begin(), rMap.end(), enable());
+    }
+}
+
+void Desktop::destroyAcceptor(const OUString& aAcceptString)
+{
+    // special case stop all acceptors
+    AcceptorMap &rMap = acceptorMap();
+    if (aAcceptString == "all") {
+        rMap.clear();
+
+    } else {
+        // try to remove acceptor from map
+        AcceptorMap::const_iterator pIter = rMap.find(aAcceptString);
+        if (pIter != rMap.end() ) {
+            // remove reference from map
+            // this is the last reference and the acceptor will be destructed
+            rMap.erase(aAcceptString);
+        } else {
+            SAL_WARN( "desktop.app", "Found no acceptor to remove");
+        }
+    }
+}
+
+
+void Desktop::DeregisterServices()
+{
+    // stop all acceptors by clearing the map
+    acceptorMap().clear();
+}
+
+void Desktop::CreateTemporaryDirectory()
+{
+    OUString aTempBaseURL;
+    try
+    {
+        SvtPathOptions aOpt;
+        aTempBaseURL = aOpt.GetTempPath();
+    }
+    catch (RuntimeException& e)
+    {
+        // Catch runtime exception here: We have to add language dependent info
+        // to the exception message. Fallback solution uses hard coded string.
+        OUString aMsg = DpResId(STR_BOOTSTRAP_ERR_NO_PATHSET_SERVICE);
+        e.Message = aMsg + e.Message;
+        throw;
+    }
+
+    // create new current temporary directory
+    OUString aTempPath = ::utl::TempFile::SetTempNameBaseDirectory( aTempBaseURL );
+    if ( aTempPath.isEmpty()
+         && ::osl::File::getTempDirURL( aTempBaseURL ) == osl::FileBase::E_None )
+    {
+        aTempPath = ::utl::TempFile::SetTempNameBaseDirectory( aTempBaseURL );
+    }
+
+    // set new current temporary directory
+    OUString aRet;
+    if (osl::FileBase::getFileURLFromSystemPath( aTempPath, aRet )
+        != osl::FileBase::E_None)
+    {
+        aRet.clear();
+    }
+    CurrentTempURL() = aRet;
+}
+
+void Desktop::RemoveTemporaryDirectory()
+{
+    // remove current temporary directory
+    OUString &rCurrentTempURL = CurrentTempURL();
+    if ( !rCurrentTempURL.isEmpty() )
+    {
+        ::utl::UCBContentHelper::Kill( rCurrentTempURL );
+    }
+}
+
+} // namespace desktop
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/check_ext_deps.cxx b/desktop/source/app/check_ext_deps.cxx
new file mode 100644
index 000000000..712ed6c73
--- /dev/null
+++ b/desktop/source/app/check_ext_deps.cxx
@@ -0,0 +1,427 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_folders.h>
+#include <config_features.h>
+
+#include <rtl/bootstrap.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/log.hxx>
+#include <cppuhelper/implbase.hxx>
+
+#include <tools/diagnose_ex.h>
+#include <toolkit/helper/vclunohelper.hxx>
+
+#include <comphelper/lok.hxx>
+#include <comphelper/processfactory.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/deployment/LicenseException.hpp>
+#include <com/sun/star/deployment/ui/LicenseDialog.hpp>
+#include <com/sun/star/task/OfficeRestartManager.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+#include <com/sun/star/task/XInteractionAbort.hpp>
+#include <com/sun/star/ui/dialogs/XExecutableDialog.hpp>
+#include <com/sun/star/ui/dialogs/ExecutableDialogResults.hpp>
+#include <com/sun/star/util/XChangesBatch.hpp>
+
+#include <app.hxx>
+#include <utility>
+
+#include <dp_misc.h>
+
+using namespace desktop;
+using namespace com::sun::star;
+using namespace com::sun::star::lang;
+using namespace com::sun::star::task;
+using namespace com::sun::star::uno;
+
+namespace
+{
+//For use with XExtensionManager.synchronize
+class SilentCommandEnv
+    : public ::cppu::WeakImplHelper< ucb::XCommandEnvironment,
+                                      task::XInteractionHandler,
+                                      ucb::XProgressHandler >
+{
+    uno::Reference<uno::XComponentContext> mxContext;
+    Desktop    *mpDesktop;
+    sal_Int32   mnLevel;
+    sal_Int32   mnProgress;
+
+public:
+    SilentCommandEnv(
+        uno::Reference<uno::XComponentContext> xContext,
+        Desktop* pDesktop );
+    virtual ~SilentCommandEnv() override;
+
+    // XCommandEnvironment
+    virtual uno::Reference<task::XInteractionHandler > SAL_CALL
+    getInteractionHandler() override;
+    virtual uno::Reference<ucb::XProgressHandler >
+    SAL_CALL getProgressHandler() override;
+
+    // XInteractionHandler
+    virtual void SAL_CALL handle(
+        uno::Reference<task::XInteractionRequest > const & xRequest ) override;
+
+    // XProgressHandler
+    virtual void SAL_CALL push( uno::Any const & Status ) override;
+    virtual void SAL_CALL update( uno::Any const & Status ) override;
+    virtual void SAL_CALL pop() override;
+};
+
+
+SilentCommandEnv::SilentCommandEnv(
+    uno::Reference<uno::XComponentContext> xContext,
+    Desktop* pDesktop ):
+    mxContext(std::move( xContext )),
+    mpDesktop( pDesktop ),
+    mnLevel( 0 ),
+    mnProgress( 25 )
+{}
+
+
+SilentCommandEnv::~SilentCommandEnv()
+{
+    if (mpDesktop)
+        mpDesktop->SetSplashScreenText(OUString());
+}
+
+
+Reference<task::XInteractionHandler> SilentCommandEnv::getInteractionHandler()
+{
+    return this;
+}
+
+
+Reference<ucb::XProgressHandler> SilentCommandEnv::getProgressHandler()
+{
+    return this;
+}
+
+
+// XInteractionHandler
+void SilentCommandEnv::handle( Reference< task::XInteractionRequest> const & xRequest )
+{
+    deployment::LicenseException licExc;
+
+    uno::Any request( xRequest->getRequest() );
+    bool bApprove = true;
+
+    if ( request >>= licExc )
+    {
+        uno::Reference< ui::dialogs::XExecutableDialog > xDialog(
+            deployment::ui::LicenseDialog::create(
+            mxContext, VCLUnoHelper::GetInterface( nullptr ),
+            licExc.ExtensionName, licExc.Text ) );
+        sal_Int16 res = xDialog->execute();
+        if ( res == ui::dialogs::ExecutableDialogResults::CANCEL )
+            bApprove = false;
+        else if ( res == ui::dialogs::ExecutableDialogResults::OK )
+            bApprove = true;
+        else
+        {
+            OSL_ASSERT(false);
+        }
+    }
+
+    // We approve everything here
+    uno::Sequence< Reference< task::XInteractionContinuation > > conts( xRequest->getContinuations() );
+    Reference< task::XInteractionContinuation > const * pConts = conts.getConstArray();
+    sal_Int32 len = conts.getLength();
+
+    for ( sal_Int32 pos = 0; pos < len; ++pos )
+    {
+        if ( bApprove )
+        {
+            uno::Reference< task::XInteractionApprove > xInteractionApprove( pConts[ pos ], uno::UNO_QUERY );
+            if ( xInteractionApprove.is() )
+                xInteractionApprove->select();
+        }
+        else
+        {
+            uno::Reference< task::XInteractionAbort > xInteractionAbort( pConts[ pos ], uno::UNO_QUERY );
+            if ( xInteractionAbort.is() )
+                xInteractionAbort->select();
+        }
+    }
+}
+
+
+// XProgressHandler
+void SilentCommandEnv::push( uno::Any const & rStatus )
+{
+    OUString sText;
+    mnLevel += 1;
+
+    if (mpDesktop && rStatus.hasValue() && (rStatus >>= sText))
+    {
+        if ( mnLevel <= 3 )
+            mpDesktop->SetSplashScreenText( sText );
+        else
+            mpDesktop->SetSplashScreenProgress( ++mnProgress );
+    }
+}
+
+
+void SilentCommandEnv::update( uno::Any const & rStatus )
+{
+    OUString sText;
+    if (mpDesktop && rStatus.hasValue() && (rStatus >>= sText))
+    {
+        mpDesktop->SetSplashScreenText( sText );
+    }
+}
+
+
+void SilentCommandEnv::pop()
+{
+    mnLevel -= 1;
+}
+
+} // end namespace
+
+
+constexpr OUStringLiteral aAccessSrvc = u"com.sun.star.configuration.ConfigurationUpdateAccess";
+
+static sal_Int16 impl_showExtensionDialog( uno::Reference< uno::XComponentContext > const &xContext )
+{
+    uno::Reference< uno::XInterface > xService;
+    sal_Int16 nRet = 0;
+
+    uno::Reference< lang::XMultiComponentFactory > xServiceManager( xContext->getServiceManager() );
+    if( !xServiceManager.is() )
+        throw uno::RuntimeException(
+            "impl_showExtensionDialog(): unable to obtain service manager from component context", uno::Reference< uno::XInterface > () );
+
+    xService = xServiceManager->createInstanceWithContext( "com.sun.star.deployment.ui.UpdateRequiredDialog", xContext );
+    uno::Reference< ui::dialogs::XExecutableDialog > xExecutable( xService, uno::UNO_QUERY );
+    if ( xExecutable.is() )
+        nRet = xExecutable->execute();
+
+    return nRet;
+}
+
+
+// Check dependencies of all packages
+
+static bool impl_checkDependencies( const uno::Reference< uno::XComponentContext > &xContext )
+{
+    uno::Sequence< uno::Sequence< uno::Reference< deployment::XPackage > > > xAllPackages;
+    uno::Reference< deployment::XExtensionManager > xExtensionManager = deployment::ExtensionManager::get( xContext );
+
+    if ( !xExtensionManager.is() )
+    {
+        SAL_WARN( "desktop.app", "Could not get the Extension Manager!" );
+        return true;
+    }
+
+    try {
+        xAllPackages = xExtensionManager->getAllExtensions( uno::Reference< task::XAbortChannel >(),
+                                                            uno::Reference< ucb::XCommandEnvironment >() );
+    }
+    catch ( const deployment::DeploymentException & ) { return true; }
+    catch ( const ucb::CommandFailedException & ) { return true; }
+    catch ( const ucb::CommandAbortedException & ) { return true; }
+    catch ( const lang::IllegalArgumentException & e ) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw css::lang::WrappedTargetRuntimeException( e.Message,
+                        e.Context, anyEx );
+    }
+
+#ifdef DEBUG
+    sal_Int32 const nMax = 3;
+#else
+    sal_Int32 const nMax = 2;
+#endif
+
+    for ( uno::Sequence< uno::Reference< deployment::XPackage > > const & xPackageList : std::as_const(xAllPackages) )
+    {
+        for ( sal_Int32 j = 0; (j<nMax) && (j < xPackageList.getLength()); ++j )
+        {
+            uno::Reference< deployment::XPackage > xPackage = xPackageList[j];
+            if ( xPackage.is() )
+            {
+                bool bRegistered = false;
+                try {
+                    beans::Optional< beans::Ambiguous< sal_Bool > > option( xPackage->isRegistered( uno::Reference< task::XAbortChannel >(),
+                                                                                                    uno::Reference< ucb::XCommandEnvironment >() ) );
+                    if ( option.IsPresent )
+                    {
+                        ::beans::Ambiguous< sal_Bool > const & reg = option.Value;
+                        if ( reg.IsAmbiguous )
+                            bRegistered = false;
+                        else
+                            bRegistered = reg.Value;
+                    }
+                    else
+                        bRegistered = false;
+                }
+                catch ( const uno::RuntimeException & ) { throw; }
+                catch (const uno::Exception & ) {
+                   TOOLS_WARN_EXCEPTION( "desktop.app", "" );
+                }
+
+                if ( bRegistered )
+                {
+                    bool bDependenciesValid = false;
+                    try {
+                        bDependenciesValid = xPackage->checkDependencies( uno::Reference< ucb::XCommandEnvironment >() );
+                    }
+                    catch ( const deployment::DeploymentException & ) {}
+                    if ( ! bDependenciesValid )
+                    {
+                        return false;
+                    }
+                }
+            }
+        }
+    }
+    return true;
+}
+
+
+// resets the 'check needed' flag (needed, if aborted)
+
+static void impl_setNeedsCompatCheck()
+{
+    try {
+        Reference< XMultiServiceFactory > theConfigProvider(
+            configuration::theDefaultProvider::get(
+                comphelper::getProcessComponentContext() ) );
+
+        beans::NamedValue v( "nodepath",
+                      Any( OUString("org.openoffice.Setup/Office") ) );
+        Sequence< Any > theArgs{ Any(v) };
+        Reference< beans::XPropertySet > pset(
+            theConfigProvider->createInstanceWithArguments( aAccessSrvc, theArgs ), UNO_QUERY_THROW );
+
+        Any value( OUString("never") );
+
+        pset->setPropertyValue("LastCompatibilityCheckID", value );
+        Reference< util::XChangesBatch >( pset, UNO_QUERY_THROW )->commitChanges();
+    }
+    catch (const Exception&) {}
+}
+
+
+// to check if we need checking the dependencies of the extensions again, we compare
+// the build id of the office with the one of the last check
+
+static bool impl_needsCompatCheck()
+{
+    bool bNeedsCheck = false;
+    OUString aLastCheckBuildID;
+    OUString aCurrentBuildID( "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version") ":buildid}" );
+    rtl::Bootstrap::expandMacros( aCurrentBuildID );
+
+    try {
+        Reference< XMultiServiceFactory > theConfigProvider(
+            configuration::theDefaultProvider::get(
+                comphelper::getProcessComponentContext() ) );
+
+        beans::NamedValue v( "nodepath",
+                      Any( OUString("org.openoffice.Setup/Office") ) );
+        Sequence< Any > theArgs{ Any(v) };
+        Reference< beans::XPropertySet > pset(
+            theConfigProvider->createInstanceWithArguments( aAccessSrvc, theArgs ), UNO_QUERY_THROW );
+
+        Any result = pset->getPropertyValue("LastCompatibilityCheckID");
+
+        result >>= aLastCheckBuildID;
+        if ( aLastCheckBuildID != aCurrentBuildID )
+        {
+            bNeedsCheck = true;
+            result <<= aCurrentBuildID;
+            pset->setPropertyValue("LastCompatibilityCheckID", result );
+            Reference< util::XChangesBatch >( pset, UNO_QUERY_THROW )->commitChanges();
+        }
+#ifdef DEBUG
+        bNeedsCheck = true;
+#endif
+    }
+    catch (const css::uno::Exception&) {}
+
+    return bNeedsCheck;
+}
+
+
+// Do we need to check the dependencies of the extensions?
+// When there are unresolved issues, we can't continue with startup
+bool Desktop::CheckExtensionDependencies()
+{
+    if (!impl_needsCompatCheck())
+    {
+        return false;
+    }
+
+    uno::Reference< uno::XComponentContext > xContext(
+        comphelper::getProcessComponentContext());
+
+    bool bDependenciesValid = impl_checkDependencies( xContext );
+
+    short nRet = 0;
+
+    if ( !bDependenciesValid )
+        nRet = impl_showExtensionDialog( xContext );
+
+    if ( nRet == -1 )
+    {
+        impl_setNeedsCompatCheck();
+        return true;
+    }
+    else
+        return false;
+}
+
+void Desktop::SynchronizeExtensionRepositories(bool bCleanedExtensionCache, Desktop* pDesktop)
+{
+    uno::Reference< uno::XComponentContext > context(
+        comphelper::getProcessComponentContext());
+    uno::Reference< ucb::XCommandEnvironment > silent(
+        new SilentCommandEnv(context, pDesktop));
+    if (bCleanedExtensionCache) {
+        deployment::ExtensionManager::get(context)->reinstallDeployedExtensions(
+            true, "user", Reference<task::XAbortChannel>(), silent);
+#if !HAVE_FEATURE_MACOSX_SANDBOX
+        if (!comphelper::LibreOfficeKit::isActive())
+            task::OfficeRestartManager::get(context)->requestRestart(
+                silent->getInteractionHandler());
+#endif
+    } else {
+        // reinstallDeployedExtensions above already calls syncRepositories internally
+
+        // Force syncing repositories on startup. There are cases where the extension
+        // registration becomes invalid which leads to extensions not starting up, although
+        // installed and active. Syncing extension repos on startup fixes that.
+        dp_misc::syncRepositories(/*force=*/true, silent);
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/cmdlineargs.cxx b/desktop/source/app/cmdlineargs.cxx
new file mode 100644
index 000000000..9f9251064
--- /dev/null
+++ b/desktop/source/app/cmdlineargs.cxx
@@ -0,0 +1,793 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_features.h>
+
+#if HAVE_FEATURE_MACOSX_SANDBOX
+#include <premac.h>
+#include <Foundation/Foundation.h>
+#include <postmac.h>
+#endif
+
+#include "cmdlineargs.hxx"
+#include <osl/thread.hxx>
+#include <tools/stream.hxx>
+#include <tools/urlobj.hxx>
+#include <rtl/ustring.hxx>
+#include <rtl/process.h>
+#include <comphelper/lok.hxx>
+#include <comphelper/processfactory.hxx>
+#include <com/sun/star/uri/ExternalUriReferenceTranslator.hpp>
+#include <unotools/bootstrap.hxx>
+
+#include <rtl/strbuf.hxx>
+#include <osl/file.hxx>
+#include <sal/log.hxx>
+
+using namespace com::sun::star::lang;
+using namespace com::sun::star::uri;
+using namespace com::sun::star::uno;
+
+namespace desktop
+{
+
+namespace {
+
+OUString translateExternalUris(OUString const & input) {
+    OUString t(
+        css::uri::ExternalUriReferenceTranslator::create(
+            comphelper::getProcessComponentContext())->
+        translateToInternal(input));
+    return t.isEmpty() ? input : t;
+}
+
+std::vector< OUString > translateExternalUris(
+    std::vector< OUString > const & input)
+{
+    std::vector< OUString > t;
+    t.reserve(input.size());
+    for (auto const& elem : input)
+    {
+        t.push_back(translateExternalUris(elem));
+    }
+    return t;
+}
+
+class ExtCommandLineSupplier: public CommandLineArgs::Supplier {
+public:
+    explicit ExtCommandLineSupplier():
+        m_count(
+            comphelper::LibreOfficeKit::isActive()
+            ? 0 : rtl_getAppCommandArgCount()),
+        m_index(0)
+    {
+        OUString url;
+        if (utl::Bootstrap::getProcessWorkingDir(url)) {
+            m_cwdUrl = url;
+        }
+    }
+
+    virtual std::optional< OUString > getCwdUrl() override { return m_cwdUrl; }
+
+    virtual bool next(OUString * argument) override {
+        OSL_ASSERT(argument != nullptr);
+        if (m_index < m_count) {
+            rtl_getAppCommandArg(m_index++, &argument->pData);
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+private:
+    std::optional< OUString > m_cwdUrl;
+    sal_uInt32 m_count;
+    sal_uInt32 m_index;
+};
+
+enum class CommandLineEvent {
+    Open, Print, View, Start, PrintTo,
+    ForceOpen, ForceNew, Conversion, BatchPrint
+};
+
+// Office URI Schemes: see https://msdn.microsoft.com/en-us/library/dn906146
+// This functions checks if the arg is an Office URI.
+// If applicable, it updates arg to inner URI.
+// If no event argument is explicitly set in command line,
+// then it returns updated command line event,
+// according to Office URI command.
+CommandLineEvent CheckOfficeURI(/* in,out */ OUString& arg, CommandLineEvent curEvt)
+{
+    // 1. Strip the scheme name
+    OUString rest1;
+    bool isOfficeURI = ( arg.startsWithIgnoreAsciiCase("vnd.libreoffice.command:", &rest1) // Proposed extended schema
+                      || arg.startsWithIgnoreAsciiCase("ms-word:",                 &rest1)
+                      || arg.startsWithIgnoreAsciiCase("ms-powerpoint:",           &rest1)
+                      || arg.startsWithIgnoreAsciiCase("ms-excel:",                &rest1)
+                      || arg.startsWithIgnoreAsciiCase("ms-visio:",                &rest1)
+                      || arg.startsWithIgnoreAsciiCase("ms-access:",               &rest1));
+    if (!isOfficeURI)
+        return curEvt;
+
+    OUString rest2;
+    tools::Long nURIlen = -1;
+
+    // URL might be encoded
+    OUString decoded_rest = rest1.replaceAll("%7C", "|").replaceAll("%7c", "|");
+
+    // 2. Discriminate by command name (incl. 1st command argument descriptor)
+    //    Extract URI: everything up to possible next argument
+    if (decoded_rest.startsWith("ofv|u|", &rest2))
+    {
+        // Open for view - override only in default mode
+        if (curEvt == CommandLineEvent::Open)
+            curEvt = CommandLineEvent::View;
+        nURIlen = rest2.indexOf("|");
+    }
+    else if (decoded_rest.startsWith("ofe|u|", &rest2))
+    {
+        // Open for editing - override only in default mode
+        if (curEvt == CommandLineEvent::Open)
+            curEvt = CommandLineEvent::ForceOpen;
+        nURIlen = rest2.indexOf("|");
+    }
+    else if (decoded_rest.startsWith("nft|u|", &rest2))
+    {
+        // New from template - override only in default mode
+        if (curEvt == CommandLineEvent::Open)
+            curEvt = CommandLineEvent::ForceNew;
+        nURIlen = rest2.indexOf("|");
+        // TODO: process optional second argument (default save-to location)
+        // For now, we just ignore it
+    }
+    else
+    {
+        // Abbreviated scheme: <scheme-name>:URI
+        // "ofv|u|" implied
+        // override only in default mode
+        if (curEvt == CommandLineEvent::Open)
+            curEvt = CommandLineEvent::View;
+        rest2 = rest1;
+    }
+    if (nURIlen < 0)
+        nURIlen = rest2.getLength();
+    auto const uri = rest2.subView(0, nURIlen);
+    if (INetURLObject(uri).GetProtocol() == INetProtocol::Macro) {
+        // Let the "Open" machinery process the full command URI (leading to failure, by intention,
+        // as the "Open" machinery does not know about those command URI schemes):
+        curEvt = CommandLineEvent::Open;
+    } else {
+        arg = uri;
+    }
+    return curEvt;
+}
+
+// Skip single newline (be it *NIX LF, MacOS CR, of Win CRLF)
+// Changes the offset, and returns true if moved
+bool SkipNewline(const char* & pStr)
+{
+    if ((*pStr != '\r') && (*pStr != '\n'))
+        return false;
+    if (*pStr == '\r')
+        ++pStr;
+    if (*pStr == '\n')
+        ++pStr;
+    return true;
+}
+
+// Web query: http://support.microsoft.com/kb/157482
+CommandLineEvent CheckWebQuery(/* in,out */ OUString& arg, CommandLineEvent curEvt)
+{
+    // Only handle files with extension .iqy
+    if (!arg.endsWithIgnoreAsciiCase(".iqy"))
+        return curEvt;
+
+    static osl::Mutex aMutex;
+    osl::MutexGuard aGuard(aMutex);
+
+    try
+    {
+        OUString sFileURL;
+        // Cannot use translateExternalUris yet, because process service factory is not yet available
+        if (osl::FileBase::getFileURLFromSystemPath(arg, sFileURL) != osl::FileBase::RC::E_None)
+            return curEvt;
+        SvFileStream stream(sFileURL, StreamMode::READ);
+
+        const sal_Int32 nBufLen = 32000;
+        char sBuffer[nBufLen];
+        size_t nRead = stream.ReadBytes(sBuffer, nBufLen);
+        if (nRead < 8) // WEB\n1\n...
+            return curEvt;
+
+        const char* pPos = sBuffer;
+        if (strncmp(pPos, "WEB", 3) != 0)
+            return curEvt;
+        pPos += 3;
+        if (!SkipNewline(pPos))
+            return curEvt;
+        if (*pPos != '1')
+            return curEvt;
+        ++pPos;
+        if (!SkipNewline(pPos))
+            return curEvt;
+
+        OStringBuffer aResult(nRead);
+        do
+        {
+            const char* pPos1 = pPos;
+            const char* pEnd = sBuffer + nRead;
+            while ((pPos1 < pEnd) && (*pPos1 != '\r') && (*pPos1 != '\n'))
+                ++pPos1;
+            aResult.append(pPos, pPos1 - pPos);
+            if (pPos1 < pEnd) // newline
+                break;
+            pPos = sBuffer;
+        } while ((nRead = stream.ReadBytes(sBuffer, nBufLen)) > 0);
+
+        stream.Close();
+
+        arg = OStringToOUString(aResult, osl_getThreadTextEncoding());
+        return CommandLineEvent::ForceNew;
+    }
+    catch (...)
+    {
+        SAL_WARN("desktop.app", "An error processing Web Query file: " << arg);
+    }
+
+    return curEvt;
+}
+
+} // namespace
+
+CommandLineArgs::Supplier::Exception::Exception() {}
+
+CommandLineArgs::Supplier::Exception::Exception(Exception const &) {}
+
+CommandLineArgs::Supplier::Exception &
+CommandLineArgs::Supplier::Exception::operator =(Exception const &)
+{ return *this; }
+
+CommandLineArgs::Supplier::~Supplier() {}
+
+// initialize class with command line parameters from process environment
+CommandLineArgs::CommandLineArgs()
+{
+    InitParamValues();
+    ExtCommandLineSupplier s;
+    ParseCommandLine_Impl( s );
+}
+
+CommandLineArgs::CommandLineArgs( Supplier& supplier )
+{
+    InitParamValues();
+    ParseCommandLine_Impl( supplier );
+}
+
+void CommandLineArgs::ParseCommandLine_Impl( Supplier& supplier )
+{
+    m_cwdUrl = supplier.getCwdUrl();
+    CommandLineEvent eCurrentEvent = CommandLineEvent::Open;
+
+    for (;;)
+    {
+        OUString aArg;
+        if ( !supplier.next( &aArg ) )
+        {
+            break;
+        }
+
+        if ( !aArg.isEmpty() )
+        {
+            m_bEmpty = false;
+            OUString oArg;
+            OUString oDeprecatedArg;
+            if (!aArg.startsWith("--", &oArg) && aArg.startsWith("-", &oArg)
+                && aArg.getLength() > 2) // -h, -?, -n, -o, -p are still valid
+            {
+                oDeprecatedArg = aArg; // save here, since aArg can change later
+            }
+
+            OUString rest;
+            if ( oArg == "minimized" )
+            {
+                m_minimized = true;
+            }
+            else if ( oArg == "invisible" )
+            {
+                m_invisible = true;
+            }
+            else if ( oArg == "norestore" )
+            {
+                m_norestore = true;
+            }
+            else if ( oArg == "nodefault" )
+            {
+                m_nodefault = true;
+            }
+            else if ( oArg == "headless" )
+            {
+                setHeadless();
+            }
+            else if ( oArg == "eventtesting" )
+            {
+                m_eventtesting = true;
+            }
+            else if ( oArg == "safe-mode" )
+            {
+                m_safemode = true;
+            }
+            else if ( oArg == "cat" )
+            {
+                m_textcat = true;
+                m_conversionparams = "txt:Text";
+                eCurrentEvent = CommandLineEvent::Conversion;
+                setHeadless();
+            }
+            else if ( oArg == "script-cat" )
+            {
+                m_scriptcat = true;
+                eCurrentEvent = CommandLineEvent::Conversion;
+                setHeadless();
+            }
+            else if ( oArg == "quickstart" )
+            {
+#if defined(ENABLE_QUICKSTART_APPLET)
+                m_quickstart = true;
+#endif
+                m_noquickstart = false;
+            }
+            else if ( oArg == "quickstart=no" )
+            {
+                m_noquickstart = true;
+                m_quickstart = false;
+            }
+            else if ( oArg == "terminate_after_init" )
+            {
+                m_terminateafterinit = true;
+            }
+            else if ( oArg == "nofirststartwizard" )
+            {
+                // Do nothing, accept only for backward compatibility
+            }
+            else if ( oArg == "nologo" )
+            {
+                m_nologo = true;
+            }
+#if HAVE_FEATURE_MULTIUSER_ENVIRONMENT
+            else if ( oArg == "nolockcheck" )
+            {
+                m_nolockcheck = true;
+            }
+#endif
+            else if ( oArg == "help" || aArg == "-h" || aArg == "-?" )
+            {
+                m_help = true;
+            }
+            else if ( oArg == "helpwriter" )
+            {
+                m_helpwriter = true;
+            }
+            else if ( oArg == "helpcalc" )
+            {
+                m_helpcalc = true;
+            }
+            else if ( oArg == "helpdraw" )
+            {
+                m_helpdraw = true;
+            }
+            else if ( oArg == "helpimpress" )
+            {
+                m_helpimpress = true;
+            }
+            else if ( oArg == "helpbase" )
+            {
+                m_helpbase = true;
+            }
+            else if ( oArg == "helpbasic" )
+            {
+                m_helpbasic = true;
+            }
+            else if ( oArg == "helpmath" )
+            {
+                m_helpmath = true;
+            }
+            else if ( oArg == "protector" )
+            {
+                // Not relevant for us here, but can be used in unit tests.
+                // Usually unit tests would not end up here, but e.g. the
+                // LOK Tiled Rendering tests end up running a full soffice
+                // process, and we can't bail on the use of --protector.
+
+                // We specifically need to consume the following 2 arguments
+                // for --protector
+                if ((!supplier.next(&aArg) || !supplier.next(&aArg)) && m_unknown.isEmpty())
+                    m_unknown = "--protector must be followed by two arguments";
+            }
+            else if ( oArg == "version" )
+            {
+                m_version = true;
+            }
+            else if ( oArg.startsWith("splash-pipe=") )
+            {
+                m_splashpipe = true;
+            }
+#ifdef MACOSX
+            /* #i84053# ignore -psn on Mac
+               Platform dependent #ifdef here is ugly, however this is currently
+               the only platform dependent parameter. Should more appear
+               we should find a better solution
+            */
+            else if ( aArg.startsWith("-psn") )
+            {
+                oDeprecatedArg.clear();
+            }
+#endif
+#if HAVE_FEATURE_MACOSX_SANDBOX
+            else if ( oArg == "nstemporarydirectory" )
+            {
+                printf("%s\n", [NSTemporaryDirectory() UTF8String]);
+                exit(0);
+            }
+#endif
+#ifdef _WIN32
+            /* fdo#57203 ignore -Embedding on Windows
+               when LibreOffice is launched by COM+
+            */
+            else if ( oArg == "Embedding" )
+            {
+                oDeprecatedArg.clear();
+            }
+#endif
+            else if ( oArg.startsWith("infilter=", &rest))
+            {
+                m_infilter.push_back(rest);
+            }
+            else if ( oArg.startsWith("accept=", &rest))
+            {
+                m_accept.push_back(rest);
+            }
+            else if ( oArg.startsWith("unaccept=", &rest))
+            {
+                m_unaccept.push_back(rest);
+            }
+            else if ( oArg.startsWith("language=", &rest))
+            {
+                m_language = rest;
+            }
+            else if ( oArg.startsWith("pidfile=", &rest))
+            {
+                m_pidfile = rest;
+            }
+            else if ( oArg == "writer" )
+            {
+                m_writer = true;
+                m_bDocumentArgs = true;
+            }
+            else if ( oArg == "calc" )
+            {
+                m_calc = true;
+                m_bDocumentArgs = true;
+            }
+            else if ( oArg == "draw" )
+            {
+                m_draw = true;
+                m_bDocumentArgs = true;
+            }
+            else if ( oArg == "impress" )
+            {
+                m_impress = true;
+                m_bDocumentArgs = true;
+            }
+            else if ( oArg == "base" )
+            {
+                m_base = true;
+                m_bDocumentArgs = true;
+            }
+            else if ( oArg == "global" )
+            {
+                m_global = true;
+                m_bDocumentArgs = true;
+            }
+            else if ( oArg == "math" )
+            {
+                m_math = true;
+                m_bDocumentArgs = true;
+            }
+            else if ( oArg == "web" )
+            {
+                m_web = true;
+                m_bDocumentArgs = true;
+            }
+            else if ( aArg == "-n" )
+            {
+                // force new documents based on the following documents
+                eCurrentEvent = CommandLineEvent::ForceNew;
+            }
+            else if ( aArg == "-o" )
+            {
+                // force open documents regardless if they are templates or not
+                eCurrentEvent = CommandLineEvent::ForceOpen;
+            }
+            else if ( oArg == "pt" )
+            {
+                // Print to special printer
+                eCurrentEvent = CommandLineEvent::PrintTo;
+                // first argument after "-pt" must be the printer name
+                if (supplier.next(&aArg))
+                    m_printername = aArg;
+                else if (m_unknown.isEmpty())
+                    m_unknown = "--pt must be followed by printername";
+            }
+            else if ( aArg == "-p" )
+            {
+                // Print to default printer
+                eCurrentEvent = CommandLineEvent::Print;
+            }
+            else if ( oArg == "view")
+            {
+                // open in viewmode
+                eCurrentEvent = CommandLineEvent::View;
+            }
+            else if ( oArg == "show" )
+            {
+                // open in viewmode
+                eCurrentEvent = CommandLineEvent::Start;
+            }
+            else if ( oArg == "display" )
+            {
+                // The command line argument following --display should
+                // always be treated as the argument of --display.
+                // --display and its argument are handled "out of line"
+                // in Unix-only desktop/unx/source/splashx.c and vcl/unx/*,
+                // and just ignored here
+                (void)supplier.next(&aArg);
+            }
+            else if ( oArg == "convert-to" )
+            {
+                eCurrentEvent = CommandLineEvent::Conversion;
+                // first argument must be the params
+                if (supplier.next(&aArg))
+                {
+                    m_conversionparams = aArg;
+                    // It doesn't make sense to use convert-to without headless.
+                    setHeadless();
+                }
+                else if (m_unknown.isEmpty())
+                    m_unknown = "--convert-to must be followed by output_file_extension[:output_filter_name]";
+            }
+            else if ( oArg == "print-to-file" )
+            {
+                eCurrentEvent = CommandLineEvent::BatchPrint;
+            }
+            else if ( oArg == "printer-name" )
+            {
+                if (eCurrentEvent == CommandLineEvent::BatchPrint)
+                {
+                    // first argument is the printer name
+                    if (supplier.next(&aArg))
+                        m_printername = aArg;
+                    else if (m_unknown.isEmpty())
+                        m_unknown = "--printer-name must be followed by printername";
+                }
+                else if (m_unknown.isEmpty())
+                {
+                    m_unknown = "--printer-name must directly follow --print-to-file";
+                }
+            }
+            else if ( oArg == "outdir" )
+            {
+                if (eCurrentEvent == CommandLineEvent::Conversion ||
+                    eCurrentEvent == CommandLineEvent::BatchPrint)
+                {
+                    if (supplier.next(&aArg))
+                        m_conversionout = aArg;
+                    else if (m_unknown.isEmpty())
+                        m_unknown = "--outdir must be followed by output directory path";
+                }
+                else if (m_unknown.isEmpty())
+                {
+                    m_unknown = "--outdir must directly follow either output filter specification of --convert-to, or --print-to-file or its printer specification";
+                }
+            }
+            else if ( eCurrentEvent == CommandLineEvent::Conversion
+                      && oArg == "convert-images-to" )
+            {
+                if (supplier.next(&aArg))
+                    m_convertimages = aArg;
+                else if (m_unknown.isEmpty())
+                    m_unknown = "--convert-images-to must be followed by an image type";
+            }
+            else if ( aArg.startsWith("-") )
+            {
+                // because it's impossible to filter these options that
+                // are handled in the soffice shell script with the
+                // primitive tools that /bin/sh offers, ignore them here
+                if (
+#if defined UNX
+                    oArg != "record" &&
+                    oArg != "backtrace" &&
+                    oArg != "strace" &&
+                    oArg != "valgrind" &&
+                    // for X Session Management, handled in
+                    // vcl/unx/generic/app/sm.cxx:
+                    oArg != "session=" &&
+#endif
+                    //ignore additional legacy options that don't do anything anymore
+                    oArg != "nocrashreport" &&
+                    m_unknown.isEmpty())
+                {
+                    m_unknown = aArg;
+                }
+                oDeprecatedArg.clear();
+            }
+            else
+            {
+                // handle this argument as a filename
+
+                // First check if this is an Office URI
+                // This will possibly adjust event for this argument
+                // and put real URI to aArg
+                CommandLineEvent eThisEvent = CheckOfficeURI(aArg, eCurrentEvent);
+
+                // Now check if this is a Web Query file
+                eThisEvent = CheckWebQuery(aArg, eThisEvent);
+
+                switch (eThisEvent)
+                {
+                case CommandLineEvent::Open:
+                    m_openlist.push_back(aArg);
+                    m_bDocumentArgs = true;
+                    break;
+                case CommandLineEvent::View:
+                    m_viewlist.push_back(aArg);
+                    m_bDocumentArgs = true;
+                    break;
+                case CommandLineEvent::Start:
+                    m_startlist.push_back(aArg);
+                    m_bDocumentArgs = true;
+                    break;
+                case CommandLineEvent::Print:
+                    m_printlist.push_back(aArg);
+                    m_bDocumentArgs = true;
+                    break;
+                case CommandLineEvent::PrintTo:
+                    m_printtolist.push_back(aArg);
+                    m_bDocumentArgs = true;
+                    break;
+                case CommandLineEvent::ForceNew:
+                    m_forcenewlist.push_back(aArg);
+                    m_bDocumentArgs = true;
+                    break;
+                case CommandLineEvent::ForceOpen:
+                    m_forceopenlist.push_back(aArg);
+                    m_bDocumentArgs = true;
+                    break;
+                case CommandLineEvent::Conversion:
+                case CommandLineEvent::BatchPrint:
+                    m_conversionlist.push_back(aArg);
+                    break;
+                }
+            }
+
+            if (!oDeprecatedArg.isEmpty())
+            {
+                OString sArg(OUStringToOString(oDeprecatedArg, osl_getThreadTextEncoding()));
+                fprintf(stderr, "Warning: %s is deprecated.  Use -%s instead.\n", sArg.getStr(), sArg.getStr());
+            }
+        }
+    }
+}
+
+void CommandLineArgs::InitParamValues()
+{
+    m_minimized = false;
+    m_norestore = false;
+#if HAVE_FEATURE_UI
+    m_invisible = false;
+    m_headless = false;
+#else
+    m_invisible = true;
+    m_headless = true;
+#endif
+    m_eventtesting = false;
+    m_quickstart = false;
+    m_noquickstart = false;
+    m_terminateafterinit = false;
+    m_nologo = false;
+    m_nolockcheck = false;
+    m_nodefault = false;
+    m_help = false;
+    m_writer = false;
+    m_calc = false;
+    m_draw = false;
+    m_impress = false;
+    m_global = false;
+    m_math = false;
+    m_web = false;
+    m_base = false;
+    m_helpwriter = false;
+    m_helpcalc = false;
+    m_helpdraw = false;
+    m_helpbasic = false;
+    m_helpmath = false;
+    m_helpimpress = false;
+    m_helpbase = false;
+    m_version = false;
+    m_splashpipe = false;
+    m_bEmpty = true;
+    m_bDocumentArgs  = false;
+    m_textcat = false;
+    m_scriptcat = false;
+    m_safemode = false;
+}
+
+bool CommandLineArgs::HasModuleParam() const
+{
+    return m_writer || m_calc || m_draw || m_impress || m_global || m_math
+        || m_web || m_base;
+}
+
+std::vector< OUString > CommandLineArgs::GetOpenList() const
+{
+    return translateExternalUris(m_openlist);
+}
+
+std::vector< OUString > CommandLineArgs::GetViewList() const
+{
+    return translateExternalUris(m_viewlist);
+}
+
+std::vector< OUString > CommandLineArgs::GetStartList() const
+{
+    return translateExternalUris(m_startlist);
+}
+
+std::vector< OUString > CommandLineArgs::GetForceOpenList() const
+{
+    return translateExternalUris(m_forceopenlist);
+}
+
+std::vector< OUString > CommandLineArgs::GetForceNewList() const
+{
+    return translateExternalUris(m_forcenewlist);
+}
+
+std::vector< OUString > CommandLineArgs::GetPrintList() const
+{
+    return translateExternalUris(m_printlist);
+}
+
+std::vector< OUString > CommandLineArgs::GetPrintToList() const
+{
+    return translateExternalUris(m_printtolist);
+}
+
+std::vector< OUString > CommandLineArgs::GetConversionList() const
+{
+    return translateExternalUris(m_conversionlist);
+}
+
+OUString CommandLineArgs::GetConversionOut() const
+{
+    return translateExternalUris(m_conversionout);
+}
+
+} // namespace desktop
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/cmdlineargs.hxx b/desktop/source/app/cmdlineargs.hxx
new file mode 100644
index 000000000..74236f5b3
--- /dev/null
+++ b/desktop/source/app/cmdlineargs.hxx
@@ -0,0 +1,188 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vector>
+
+#include <rtl/ustring.hxx>
+#include <optional>
+
+namespace desktop
+{
+
+class CommandLineArgs
+{
+    public:
+        struct Supplier
+        {
+            // Thrown from constructors and next:
+            class Exception final
+            {
+            public:
+                Exception();
+                Exception(Exception const &);
+                Exception & operator =(Exception const &);
+            };
+
+            virtual ~Supplier();
+            virtual std::optional< OUString > getCwdUrl() = 0;
+            virtual bool next(OUString * argument) = 0;
+        };
+
+        CommandLineArgs();
+        explicit CommandLineArgs( Supplier& supplier );
+
+        CommandLineArgs(const CommandLineArgs&) = delete;
+        const CommandLineArgs& operator=(const CommandLineArgs&) = delete;
+
+        const std::optional< OUString >& getCwdUrl() const { return m_cwdUrl; }
+
+        // Access to bool parameters
+        bool                IsMinimized() const { return m_minimized;}
+        bool                IsInvisible() const
+        {
+            return m_invisible || (m_headless && !m_eventtesting);
+        }
+        bool                IsNoRestore() const { return m_norestore;}
+        bool                IsNoDefault() const { return m_nodefault;}
+        bool                IsHeadless() const { return m_headless;}
+        bool                IsEventTesting() const { return m_eventtesting;}
+        bool                IsQuickstart() const { return m_quickstart;}
+        bool                IsNoQuickstart() const { return m_noquickstart;}
+        bool                IsTerminateAfterInit() const { return m_terminateafterinit;}
+        bool                IsNoLogo() const { return m_nologo;}
+        bool                IsNoLockcheck() const { return m_nolockcheck;}
+        bool                IsHelp() const { return m_help;}
+        bool                IsHelpWriter() const { return m_helpwriter;}
+        bool                IsHelpCalc() const { return m_helpcalc;}
+        bool                IsHelpDraw() const { return m_helpdraw;}
+        bool                IsHelpImpress() const { return m_helpimpress;}
+        bool                IsHelpBase() const { return m_helpbase;}
+        bool                IsHelpMath() const { return m_helpmath;}
+        bool                IsHelpBasic() const { return m_helpbasic;}
+        bool                IsWriter() const { return m_writer;}
+        bool                IsCalc() const { return m_calc;}
+        bool                IsDraw() const { return m_draw;}
+        bool                IsImpress() const { return m_impress;}
+        bool                IsBase() const { return m_base;}
+        bool                IsGlobal() const { return m_global;}
+        bool                IsMath() const { return m_math;}
+        bool                IsWeb() const { return m_web;}
+        bool                IsVersion() const { return m_version;}
+        bool                HasModuleParam() const;
+        bool                WantsToLoadDocument() const { return m_bDocumentArgs;}
+        bool                IsTextCat() const { return m_textcat;}
+        bool                IsScriptCat() const { return m_scriptcat;}
+        bool                IsSafeMode() const { return m_safemode; }
+
+        const OUString&     GetUnknown() const { return m_unknown;}
+
+        // Access to string parameters
+        bool                    HasSplashPipe() const { return m_splashpipe;}
+        std::vector< OUString > const & GetAccept() const { return m_accept;}
+        std::vector< OUString > const & GetUnaccept() const { return m_unaccept;}
+        std::vector< OUString > GetOpenList() const;
+        std::vector< OUString > GetViewList() const;
+        std::vector< OUString > GetStartList() const;
+        std::vector< OUString > GetForceOpenList() const;
+        std::vector< OUString > GetForceNewList() const;
+        std::vector< OUString > GetPrintList() const;
+        std::vector< OUString > GetPrintToList() const;
+        const OUString&         GetPrinterName() const { return m_printername;}
+        const OUString&         GetLanguage() const { return m_language;}
+        std::vector< OUString > const & GetInFilter() const { return m_infilter;}
+        std::vector< OUString > GetConversionList() const;
+        const OUString&         GetConversionParams() const { return m_conversionparams;}
+        OUString                GetConversionOut() const;
+        OUString const &        GetImageConversionType() const { return m_convertimages; }
+        const OUString&         GetPidfileName() const { return m_pidfile;}
+
+        // Special analyzed states (does not match directly to a command line parameter!)
+        bool IsEmpty() const { return m_bEmpty;}
+
+        void setHeadless() { m_headless = true; }
+
+    private:
+        void                    ParseCommandLine_Impl( Supplier& supplier );
+        void                    InitParamValues();
+
+        std::optional< OUString > m_cwdUrl;
+
+        bool m_minimized;
+        bool m_invisible;
+        bool m_norestore;
+        bool m_headless;
+        bool m_eventtesting;
+        bool m_quickstart;
+        bool m_noquickstart;
+        bool m_terminateafterinit;
+        bool m_nologo;
+        bool m_nolockcheck;
+        bool m_nodefault;
+        bool m_help;
+        bool m_writer;
+        bool m_calc;
+        bool m_draw;
+        bool m_impress;
+        bool m_global;
+        bool m_math;
+        bool m_web;
+        bool m_base;
+        bool m_helpwriter;
+        bool m_helpcalc;
+        bool m_helpdraw;
+        bool m_helpbasic;
+        bool m_helpmath;
+        bool m_helpimpress;
+        bool m_helpbase;
+        bool m_version;
+        bool m_splashpipe;
+        bool m_textcat;
+        bool m_scriptcat;
+        bool m_safemode;
+
+        OUString m_unknown;
+
+        bool m_bEmpty; // No Args at all
+        bool m_bDocumentArgs; // A document creation/open/load arg is used
+        std::vector< OUString > m_accept;
+        std::vector< OUString > m_unaccept;
+        std::vector< OUString > m_openlist; // contains external URIs
+        std::vector< OUString > m_viewlist; // contains external URIs
+        std::vector< OUString > m_startlist; // contains external URIs
+        std::vector< OUString > m_forceopenlist; // contains external URIs
+        std::vector< OUString > m_forcenewlist; // contains external URIs
+        std::vector< OUString > m_printlist; // contains external URIs
+        std::vector< OUString > m_printtolist; // contains external URIs
+        OUString m_printername;
+        std::vector< OUString > m_conversionlist; // contains external URIs
+        OUString m_conversionparams;
+        OUString m_conversionout; // contains external URIs
+        OUString m_convertimages; // The format in which images should be converted
+        std::vector< OUString > m_infilter;
+        OUString m_language;
+        OUString m_pidfile;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/cmdlinehelp.cxx b/desktop/source/app/cmdlinehelp.cxx
new file mode 100644
index 000000000..419b03b3a
--- /dev/null
+++ b/desktop/source/app/cmdlinehelp.cxx
@@ -0,0 +1,263 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <stdio.h>
+#include <comphelper/string.hxx>
+#include <app.hxx>
+
+#include "cmdlinehelp.hxx"
+
+#ifdef _WIN32
+#if !defined WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#include <io.h>
+#include <fcntl.h>
+#endif
+
+namespace desktop
+{
+    constexpr OUStringLiteral aCmdLineHelp_version =
+        u"%PRODUCTNAME %PRODUCTVERSION%PRODUCTEXTENSION %BUILDID\n"
+        "\n";
+    constexpr OUStringLiteral aCmdLineHelp =
+        u"Usage: %CMDNAME [argument...]\n"
+        "       argument - switches, switch parameters and document URIs (filenames).   \n\n"
+        "Using without special arguments:                                               \n"
+        "Opens the start center, if it is used without any arguments.                   \n"
+        "   {file}              Tries to open the file (files) in the components        \n"
+        "                       suitable for them.                                      \n"
+        "   {file} {macro:///Library.Module.MacroName}                                  \n"
+        "                       Opens the file and runs specified macros from           \n"
+        "                       the file.                                               \n\n"
+        "Getting help and information:                                                  \n"
+        "   --help | -h | -?    Shows this help and quits.                              \n"
+        "   --helpwriter        Opens built-in or online Help on Writer.                \n"
+        "   --helpcalc          Opens built-in or online Help on Calc.                  \n"
+        "   --helpdraw          Opens built-in or online Help on Draw.                  \n"
+        "   --helpimpress       Opens built-in or online Help on Impress.               \n"
+        "   --helpbase          Opens built-in or online Help on Base.                  \n"
+        "   --helpbasic         Opens built-in or online Help on Basic scripting        \n"
+        "                       language.                                               \n"
+        "   --helpmath          Opens built-in or online Help on Math.                  \n"
+        "   --version           Shows the version and quits.                            \n"
+        "   --nstemporarydirectory                                                      \n"
+        "                       (MacOS X sandbox only) Returns path of the temporary    \n"
+        "                       directory for the current user and exits. Overrides     \n"
+        "                       all other arguments.                                    \n\n"
+        "General arguments:                                                             \n"
+        "   --quickstart[=no]   Activates[Deactivates] the Quickstarter service.        \n"
+        "   --nolockcheck       Disables check for remote instances using one           \n"
+        "                       installation.                                           \n"
+        "   --infilter={filter} Force an input filter type if possible. For example:    \n"
+        "                       --infilter=\"Calc Office Open XML\"                     \n"
+        "                       --infilter=\"Text (encoded):UTF8,LF,,,\"                \n"
+        "   --pidfile={file}    Store soffice.bin pid to {file}.                        \n"
+        "   --display {display} Sets the DISPLAY environment variable on UNIX-like      \n"
+        "                       platforms to the value {display} (only supported by a   \n"
+        "                       start script).                                          \n\n"
+        "User/programmatic interface control:                                           \n"
+        "   --nologo            Disables the splash screen at program start.            \n"
+        "   --minimized         Starts minimized. The splash screen is not displayed.   \n"
+        "   --nodefault         Starts without displaying anything except the splash    \n"
+        "                       screen (do not display initial window).                 \n"
+        "   --invisible         Starts in invisible mode. Neither the start-up logo nor \n"
+        "                       the initial program window will be visible. Application \n"
+        "                       can be controlled, and documents and dialogs can be     \n"
+        "                       controlled and opened via the API. Using the parameter, \n"
+        "                       the process can only be ended using the taskmanager     \n"
+        "                       (Windows) or the kill command (UNIX-like systems). It   \n"
+        "                       cannot be used in conjunction with --quickstart.        \n"
+        "   --headless          Starts in \"headless mode\" which allows using the      \n"
+        "                       application without GUI. This special mode can be used  \n"
+        "                       when the application is controlled by external clients  \n"
+        "                       via the API.                                            \n"
+        "   --norestore         Disables restart and file recovery after a system crash.\n"
+        "   --safe-mode         Starts in a safe mode, i.e. starts temporarily with a   \n"
+        "                       fresh user profile and helps to restore a broken        \n"
+        "                       configuration.                                          \n"
+        "   --accept={connect-string}  Specifies a UNO connect-string to create a UNO   \n"
+        "                       acceptor through which other programs can connect to    \n"
+        "                       access the API. Note that API access allows execution   \n"
+        "                       of arbitrary commands.                                  \n"
+        "                       The syntax of the {connect-string} is:                  \n"
+        "                         connection-type,params;protocol-name,params           \n"
+        "                       e.g.  pipe,name={some name};urp                         \n"
+        "                         or  socket,host=localhost,port=54321;urp              \n"
+        "   --unaccept={connect-string}  Closes an acceptor that was created with       \n"
+        "                       --accept. Use --unaccept=all to close all acceptors.    \n"
+        "   --language={lang}   Uses specified language, if language is not selected    \n"
+        "                       yet for UI. The lang is a tag of the language in IETF   \n"
+        "                       language tag.                                           \n\n"
+        "Developer arguments:                                                           \n"
+        "   --terminate_after_init                                                      \n"
+        "                       Exit after initialization complete (no documents loaded)\n"
+        "   --eventtesting      Exit after loading documents.                           \n\n"
+        "New document creation arguments:                                               \n"
+        "The arguments create an empty document of specified kind. Only one of them may \n"
+        "be used in one command line. If filenames are specified after an argument,     \n"
+        "then it tries to open those files in the specified component.                  \n"
+        "   --writer            Creates an empty Writer document.                       \n"
+        "   --calc              Creates an empty Calc document.                         \n"
+        "   --draw              Creates an empty Draw document.                         \n"
+        "   --impress           Creates an empty Impress document.                      \n"
+        "   --base              Creates a new database.                                 \n"
+        "   --global            Creates an empty Writer master (global) document.       \n"
+        "   --math              Creates an empty Math document (formula).               \n"
+        "   --web               Creates an empty HTML document.                         \n\n"
+        "File open arguments:                                                           \n"
+        "The arguments define how following filenames are treated. New treatment begins \n"
+        "after the argument and ends at the next argument. The default treatment is to  \n"
+        "open documents for editing, and create new documents from document templates.  \n"
+        "   -n                  Treats following files as templates for creation of new \n"
+        "                       documents.                                              \n"
+        "   -o                  Opens following files for editing, regardless whether   \n"
+        "                       they are templates or not.                              \n"
+        "   --pt {Printername}  Prints following files to the printer {Printername},    \n"
+        "                       after which those files are closed. The splash screen   \n"
+        "                       does not appear. If used multiple times, only last      \n"
+        "                       {Printername} is effective for all documents of all     \n"
+        "                       --pt runs. Also, --printer-name argument of             \n"
+        "                       --print-to-file switch interferes with {Printername}.   \n"
+        "   -p                  Prints following files to the default printer, after    \n"
+        "                       which those files are closed. The splash screen does    \n"
+        "                       not appear. If the file name contains spaces, then it   \n"
+        "                       must be enclosed in quotation marks.                    \n"
+        "   --view              Opens following files in viewer mode (read-only).       \n"
+        "   --show              Opens and starts the following presentation documents   \n"
+        "                       of each immediately. Files are closed after the showing.\n"
+        "                       Files other than Impress documents are opened in        \n"
+        "                       default mode , regardless of previous mode.             \n"
+        "   --convert-to OutputFileExtension[:OutputFilterName] \\                      \n"
+        "     [--outdir output_dir] [--convert-images-to]                               \n"
+        "                       Batch convert files (implies --headless). If --outdir   \n"
+        "                       isn't specified, then current working directory is used \n"
+        "                       as output_dir. If --convert-images-to is given, its     \n"
+        "                       parameter is taken as the target filter format for *all*\n"
+        "                       images written to the output format. If --convert-to is \n"
+        "                       used more than once, the last value of                  \n"
+        "                       OutputFileExtension[:OutputFilterName] is effective. If \n"
+        "                       --outdir is used more than once, only its last value is \n"
+        "                       effective. For example:                                 \n"
+        "                   --convert-to pdf *.odt                                      \n"
+        "                   --convert-to epub *.doc                                     \n"
+        "                   --convert-to pdf:writer_pdf_Export --outdir /home/user *.doc\n"
+        "                   --convert-to \"html:XHTML Writer File:UTF8\" \\             \n"
+        "                                --convert-images-to \"jpg\" *.doc              \n"
+        "                   --convert-to \"txt:Text (encoded):UTF8\" *.doc              \n"
+        "   --print-to-file [--printer-name printer_name] [--outdir output_dir]         \n"
+        "                       Batch print files to file. If --outdir is not specified,\n"
+        "                       then current working directory is used as output_dir.   \n"
+        "                       If --printer-name or --outdir used multiple times, only \n"
+        "                       last value of each is effective. Also, {Printername} of \n"
+        "                       --pt switch interferes with --printer-name.             \n"
+        "   --cat               Dump text content of the following files to console     \n"
+        "                       (implies --headless). Cannot be used with --convert-to. \n"
+        "   --script-cat        Dump text content of any scripts embedded in the files  \n"
+        "                       to console (implies --headless). Cannot be used with    \n"
+        "                       --convert-to.                                           \n"
+        "   -env:<VAR>[=<VALUE>] Set a bootstrap variable. For example: to set          \n"
+        "                       a non-default user profile path:                        \n"
+        "                       -env:UserInstallation=file:///tmp/test                  \n\n"
+        "Ignored switches:                                                              \n"
+        "   -psn                Ignored (MacOS X only).                                 \n"
+        "   -Embedding          Ignored (COM+ related; Windows only).                   \n"
+        "   --nofirststartwizard Does nothing, accepted only for backward compatibility.\n"
+        "   --protector {arg1} {arg2}                                                   \n"
+        "                       Used only in unit tests and should have two arguments.  \n\n";
+#ifdef _WIN32
+    namespace{
+        // This class is only used to create a console when soffice.bin is run without own console
+        // (like using soffice.exe launcher as opposed to soffice.com), and either --version or
+        // --help command line options were specified, or an error in a command line option was
+        // detected, which requires to output strings to user.
+        class lcl_Console {
+        public:
+            explicit lcl_Console(short nBufHeight)
+                : m_bOwnConsole(AllocConsole() != FALSE)
+            {
+                if (m_bOwnConsole)
+                {
+                    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
+
+                    // Ensure that console buffer is enough to hold required data
+                    CONSOLE_SCREEN_BUFFER_INFO cinfo;
+                    GetConsoleScreenBufferInfo(hOut, &cinfo);
+                    if (cinfo.dwSize.Y < nBufHeight)
+                    {
+                        cinfo.dwSize.Y = nBufHeight;
+                        SetConsoleScreenBufferSize(hOut, cinfo.dwSize);
+                    }
+
+                    (void)freopen("CON", "r", stdin);
+                    (void)freopen("CON", "w", stdout);
+                    (void)freopen("CON", "w", stderr);
+
+                    std::ios::sync_with_stdio(true);
+                }
+            }
+
+            ~lcl_Console()
+            {
+                if (m_bOwnConsole)
+                {
+                    fflush(stdout);
+                    fprintf(stdout, "Press Enter to continue...");
+                    fgetc(stdin);
+                    FreeConsole();
+                }
+            }
+        private:
+            bool m_bOwnConsole;
+        };
+    }
+#endif
+
+    void displayCmdlineHelp(OUString const & unknown)
+    {
+        OUString aHelpMessage_version = ReplaceStringHookProc(aCmdLineHelp_version);
+        OUString aHelpMessage(OUString(aCmdLineHelp).replaceFirst("%CMDNAME", "soffice"));
+        if (!unknown.isEmpty())
+        {
+            aHelpMessage = "Error in option: " + unknown + "\n\n"
+                + aHelpMessage;
+        }
+#ifdef _WIN32
+        sal_Int32 n = comphelper::string::getTokenCount(aHelpMessage, '\n');
+        lcl_Console aConsole(short(n*2));
+#endif
+        fprintf(stdout, "%s%s",
+                OUStringToOString(aHelpMessage_version, RTL_TEXTENCODING_ASCII_US).getStr(),
+                OUStringToOString(aHelpMessage, RTL_TEXTENCODING_ASCII_US).getStr());
+    }
+
+    void displayVersion()
+    {
+        OUString aVersionMsg(aCmdLineHelp_version);
+        aVersionMsg = ReplaceStringHookProc(aVersionMsg);
+#ifdef _WIN32
+        lcl_Console aConsole(short(10));
+#endif
+        fprintf(stdout, "%s", OUStringToOString(aVersionMsg, RTL_TEXTENCODING_ASCII_US).getStr());
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/cmdlinehelp.hxx b/desktop/source/app/cmdlinehelp.hxx
new file mode 100644
index 000000000..5a3212505
--- /dev/null
+++ b/desktop/source/app/cmdlinehelp.hxx
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+
+namespace desktop
+{
+void displayCmdlineHelp(OUString const& unknown);
+void displayVersion();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/crashreport.cxx b/desktop/source/app/crashreport.cxx
new file mode 100644
index 000000000..0458edf97
--- /dev/null
+++ b/desktop/source/app/crashreport.cxx
@@ -0,0 +1,478 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <desktop/crashreport.hxx>
+#include <rtl/bootstrap.hxx>
+#include <osl/file.hxx>
+#include <comphelper/processfactory.hxx>
+#include <ucbhelper/proxydecider.hxx>
+#include <unotools/bootstrap.hxx>
+#include <o3tl/char16_t2wchar_t.hxx>
+#include <desktop/minidump.hxx>
+#include <rtl/ustrbuf.hxx>
+
+#include <config_version.h>
+#include <config_folders.h>
+
+#include <string>
+#include <regex>
+
+
+#if HAVE_FEATURE_BREAKPAD
+
+#include <fstream>
+#if defined( UNX ) && !defined MACOSX && !defined IOS && !defined ANDROID
+#include <client/linux/handler/exception_handler.h>
+#elif defined _WIN32
+#if defined __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmicrosoft-enum-value"
+#endif
+#include <client/windows/handler/exception_handler.h>
+#if defined __clang__
+#pragma clang diagnostic pop
+#endif
+#include <locale>
+#include <codecvt>
+#endif
+
+osl::Mutex CrashReporter::maMutex;
+osl::Mutex CrashReporter::maActiveSfxObjectNameMutex;
+osl::Mutex CrashReporter::maUnoLogCmdMutex;
+std::unique_ptr<google_breakpad::ExceptionHandler> CrashReporter::mpExceptionHandler;
+bool CrashReporter::mbInit = false;
+CrashReporter::vmaKeyValues CrashReporter::maKeyValues;
+CrashReporter::vmaloggedUnoCommands CrashReporter::maloggedUnoCommands;
+OUString CrashReporter::msActiveSfxObjectName;
+
+
+#if defined( UNX ) && !defined MACOSX && !defined IOS && !defined ANDROID
+static bool dumpCallback(const google_breakpad::MinidumpDescriptor& descriptor, void* /*context*/, bool succeeded)
+{
+    CrashReporter::addKeyValue("Active-SfxObject",CrashReporter::getActiveSfxObjectName(),CrashReporter::AddItem);
+    CrashReporter::addKeyValue("Last-4-Uno-Commands",CrashReporter::getLoggedUnoCommands(),CrashReporter::AddItem);
+    CrashReporter::addKeyValue("DumpFile", OStringToOUString(descriptor.path(), RTL_TEXTENCODING_UTF8), CrashReporter::Write);
+    SAL_WARN("desktop", "minidump generated: " << descriptor.path());
+
+    return succeeded;
+}
+#elif defined _WIN32
+static bool dumpCallback(const wchar_t* path, const wchar_t* id,
+    void* /*context*/, EXCEPTION_POINTERS* /*exinfo*/,
+    MDRawAssertionInfo* /*assertion*/,
+    bool succeeded)
+{
+    // TODO: moggi: can we avoid this conversion
+#ifdef _MSC_VER
+#pragma warning (disable: 4996)
+#endif
+    std::wstring_convert<std::codecvt_utf8<wchar_t>> conv1;
+    std::string aPath = conv1.to_bytes(std::wstring(path)) + conv1.to_bytes(std::wstring(id)) + ".dmp";
+    CrashReporter::addKeyValue("Active-SfxObject",CrashReporter::getActiveSfxObjectName(),CrashReporter::AddItem);
+    CrashReporter::addKeyValue("Last-4-Uno-Commands",CrashReporter::getLoggedUnoCommands(),CrashReporter::AddItem);
+    CrashReporter::addKeyValue("DumpFile", OStringToOUString(aPath.c_str(), RTL_TEXTENCODING_UTF8), CrashReporter::AddItem);
+    CrashReporter::addKeyValue("GDIHandles", OUString::number(::GetGuiResources(::GetCurrentProcess(), GR_GDIOBJECTS)), CrashReporter::Write);
+    SAL_WARN("desktop", "minidump generated: " << aPath);
+    return succeeded;
+}
+#endif
+
+
+void CrashReporter::writeToFile(std::ios_base::openmode Openmode)
+{
+#if defined _WIN32
+    const std::string iniPath = getIniFileName();
+    std::wstring iniPathW;
+    const int nChars = MultiByteToWideChar(CP_UTF8, 0, iniPath.c_str(), -1, nullptr, 0);
+    auto buf = std::make_unique<wchar_t[]>(nChars);
+    if (MultiByteToWideChar(CP_UTF8, 0, iniPath.c_str(), -1, buf.get(), nChars) != 0)
+        iniPathW = buf.get();
+
+    std::ofstream ini_file
+        = iniPathW.empty() ? std::ofstream(iniPath, Openmode) : std::ofstream(iniPathW, Openmode);
+#else
+    std::ofstream ini_file(getIniFileName(), Openmode);
+#endif
+
+    for (auto& keyValue : maKeyValues)
+    {
+        ini_file << OUStringToOString(keyValue.first, RTL_TEXTENCODING_UTF8) << "=";
+        ini_file << OUStringToOString(keyValue.second, RTL_TEXTENCODING_UTF8) << "\n";
+    }
+
+    maKeyValues.clear();
+    ini_file.close();
+}
+
+void CrashReporter::addKeyValue(const OUString& rKey, const OUString& rValue, tAddKeyHandling AddKeyHandling)
+{
+    osl::MutexGuard aGuard(maMutex);
+
+    if (IsDumpEnable())
+    {
+        if (!rKey.isEmpty())
+            maKeyValues.push_back(mpair(rKey, rValue));
+
+        if (AddKeyHandling != AddItem)
+        {
+            if (mbInit)
+                writeToFile(std::ios_base::app);
+            else if (AddKeyHandling == Create)
+                writeCommonInfo();
+        }
+    }
+}
+
+void CrashReporter::writeCommonInfo()
+{
+    writeSystemInfo();
+
+    ucbhelper::InternetProxyDecider proxy_decider(::comphelper::getProcessComponentContext());
+
+    static const OUStringLiteral protocol = u"https";
+    static const OUStringLiteral url = u"crashreport.libreoffice.org";
+    const sal_Int32 port = 443;
+
+    const ucbhelper::InternetProxyServer proxy_server = proxy_decider.getProxy(protocol, url, port);
+
+    // save the new Keys
+    vmaKeyValues atlast = maKeyValues;
+    // clear the keys, the following Keys should be at the begin
+    maKeyValues.clear();
+
+    // limit the amount of code that needs to be executed before the crash reporting
+    addKeyValue("ProductName", "LibreOffice", AddItem);
+    addKeyValue("Version", LIBO_VERSION_DOTTED, AddItem);
+    addKeyValue("BuildID", utl::Bootstrap::getBuildIdData(""), AddItem);
+    addKeyValue("URL", protocol + "://" + url + "/submit/", AddItem);
+
+    if (!proxy_server.aName.isEmpty())
+    {
+        addKeyValue("Proxy", proxy_server.aName + ":" + OUString::number(proxy_server.nPort), AddItem);
+    }
+
+    // write the new keys at the end
+    maKeyValues.insert(maKeyValues.end(), atlast.begin(), atlast.end());
+
+    mbInit = true;
+
+    writeToFile(std::ios_base::trunc);
+
+    updateMinidumpLocation();
+}
+
+void CrashReporter::setActiveSfxObjectName(const OUString& rActiveSfxObjectName)
+{
+    osl::MutexGuard aGuard(maActiveSfxObjectNameMutex);
+    msActiveSfxObjectName = rActiveSfxObjectName;
+}
+
+OUString CrashReporter::getActiveSfxObjectName()
+{
+    osl::MutexGuard aGuard(maActiveSfxObjectNameMutex);
+    return msActiveSfxObjectName;
+}
+
+void CrashReporter::logUnoCommand(const OUString& rUnoCommand)
+{
+    osl::MutexGuard aGuard(maUnoLogCmdMutex);
+
+    if( maloggedUnoCommands.size() == 4 )
+        maloggedUnoCommands.pop_front();
+
+    maloggedUnoCommands.push_back(rUnoCommand);
+}
+
+OUString CrashReporter::getLoggedUnoCommands()
+{
+    osl::MutexGuard aGuard(maUnoLogCmdMutex);
+
+    OUString aCommandSeperator="";
+    OUStringBuffer aUnoCommandBuffer;
+
+    for( auto& unocommand: maloggedUnoCommands)
+    {
+        aUnoCommandBuffer.append(aCommandSeperator);
+        aUnoCommandBuffer.append(unocommand);
+        aCommandSeperator=",";
+    }
+    return aUnoCommandBuffer.makeStringAndClear();
+}
+
+namespace {
+
+OUString getCrashDirectory()
+{
+    OUString aCrashURL;
+    rtl::Bootstrap::get("CrashDirectory", aCrashURL);
+    // Need to convert to URL in case of user-defined path
+    osl::FileBase::getFileURLFromSystemPath(aCrashURL, aCrashURL);
+
+    if (aCrashURL.isEmpty()) { // Fall back to user profile
+        aCrashURL = "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("bootstrap") ":UserInstallation}/crash/";
+        rtl::Bootstrap::expandMacros(aCrashURL);
+    }
+
+    if (!aCrashURL.endsWith("/"))
+        aCrashURL += "/";
+
+    osl::Directory::create(aCrashURL);
+    OUString aCrashPath;
+    osl::FileBase::getSystemPathFromFileURL(aCrashURL, aCrashPath);
+    return aCrashPath;
+}
+
+}
+
+void CrashReporter::updateMinidumpLocation()
+{
+#if defined( UNX ) && !defined MACOSX && !defined IOS && !defined ANDROID
+    OUString aURL = getCrashDirectory();
+    OString aOStringUrl = OUStringToOString(aURL, RTL_TEXTENCODING_UTF8);
+    google_breakpad::MinidumpDescriptor descriptor(aOStringUrl.getStr());
+    mpExceptionHandler->set_minidump_descriptor(descriptor);
+#elif defined _WIN32
+    OUString aURL = getCrashDirectory();
+    mpExceptionHandler->set_dump_path(o3tl::toW(aURL.getStr()));
+#endif
+}
+
+bool CrashReporter::crashReportInfoExists()
+{
+    static const bool InfoExist = crashreport::readConfig(CrashReporter::getIniFileName(), nullptr);
+    return InfoExist;
+}
+
+bool CrashReporter::readSendConfig(std::string& response)
+{
+    return crashreport::readConfig(CrashReporter::getIniFileName(), &response);
+}
+
+void CrashReporter::installExceptionHandler()
+{
+    if (!IsDumpEnable())
+        return;
+#if defined( UNX ) && !defined MACOSX && !defined IOS && !defined ANDROID
+    google_breakpad::MinidumpDescriptor descriptor("/tmp");
+    mpExceptionHandler = std::make_unique<google_breakpad::ExceptionHandler>(descriptor, nullptr, dumpCallback, nullptr, true, -1);
+#elif defined _WIN32
+    mpExceptionHandler = std::make_unique<google_breakpad::ExceptionHandler>(L".", nullptr, dumpCallback, nullptr, google_breakpad::ExceptionHandler::HANDLER_ALL);
+#endif
+}
+
+void CrashReporter::removeExceptionHandler()
+{
+    mpExceptionHandler.reset();
+}
+
+
+
+bool CrashReporter::IsDumpEnable()
+{
+    auto const env = std::getenv("CRASH_DUMP_ENABLE");
+    if (env != nullptr && env[0] != '\0') {
+        return true;
+    }
+    // read configuration item 'CrashDumpEnable' -> bool on/off
+    OUString sToken;
+    if (rtl::Bootstrap::get("CrashDumpEnable", sToken))
+    {
+        return sToken.toBoolean();
+    }
+    return true; // default, always on
+}
+
+
+std::string CrashReporter::getIniFileName()
+{
+    OUString url = getCrashDirectory() + "dump.ini";
+    OString aUrl = OUStringToOString(url, RTL_TEXTENCODING_UTF8);
+    std::string aRet(aUrl.getStr());
+    return aRet;
+}
+
+// Write system-specific information such as the CPU name and features.
+// This may allow us to get some statistics for decisions (such as when
+// deciding whether SSE2 can be made a hard-requirement for Windows).
+// Breakpad provides this information poorly or not at all.
+#if defined( UNX ) && !defined MACOSX && !defined IOS && !defined ANDROID
+void CrashReporter::writeSystemInfo()
+{
+    // Get 'model name' and 'flags' from /proc/cpuinfo.
+    if( std::ifstream cpuinfo( "/proc/cpuinfo" ); cpuinfo )
+    {
+        bool haveModel = false;
+        bool haveFlags = false;
+        std::regex modelRegex( "^model name[ \t]*:[ \t]*(.*)$" );
+        std::regex flagsRegex( "^flags[ \t]*:[ \t]*(.*)$" );
+        for( std::string line; std::getline( cpuinfo, line ); )
+        {
+            std::smatch match;
+            if( !haveModel && std::regex_match( line, match, modelRegex ) && match.size() == 2)
+            {
+                addKeyValue("CPUModelName", OUString::fromUtf8( match[ 1 ].str()), AddItem);
+                haveModel = true;
+            }
+            if( !haveFlags && std::regex_match( line, match, flagsRegex ) && match.size() == 2)
+            {
+                addKeyValue("CPUFlags", OUString::fromUtf8( match[ 1 ].str()), AddItem);
+                haveFlags = true;
+            }
+            if( haveModel && haveFlags )
+                break;
+        }
+    }
+    // Get 'MemTotal' from /proc/meminfo.
+    if( std::ifstream meminfo( "/proc/meminfo" ); meminfo )
+    {
+        std::regex memTotalRegex( "^MemTotal[ \t]*:[ \t]*(.*)$" );
+        for( std::string line; std::getline( meminfo, line ); )
+        {
+            std::smatch match;
+            if( std::regex_match( line, match, memTotalRegex ) && match.size() == 2)
+            {
+                addKeyValue("MemoryTotal", OUString::fromUtf8( match[ 1 ].str()), AddItem);
+                break;
+            }
+        }
+    }
+}
+#elif defined _WIN32
+void CrashReporter::writeSystemInfo()
+{
+#if !defined(_ARM64_)
+    // Get CPU model name and flags.
+    // See https://docs.microsoft.com/en-us/cpp/intrinsics/cpuid-cpuidex
+    // and https://en.wikipedia.org/wiki/CPUID .
+    int cpui[ 4 ];
+    __cpuid( cpui, 0x80000000 ); // Get the highest extended ID.
+    unsigned int exIds = cpui[ 0 ];
+    if( exIds >= 0x80000004 )
+    {
+        int brand[ 16 ];
+        __cpuidex( brand, 0x80000002, 0 );
+        __cpuidex( brand + 4, 0x80000003, 0 );
+        __cpuidex( brand + 8, 0x80000004, 0 );
+        brand[ 12 ] = 0;;
+        addKeyValue( "CPUModelName", OUString::fromUtf8( reinterpret_cast< const char* >( brand )),
+            AddItem );
+    }
+    __cpuid( cpui, 0 ); // Get the highest ID.
+    int ids = cpui[ 0 ];
+    unsigned int ecx1 = 0, edx1 = 0, ebx7 = 0, ecx7 = 0, ecx81 = 0, edx81 = 0;
+    if( ids >= 0x1 )
+    {
+        __cpuidex( cpui, 0x1, 0 );
+        ecx1 = cpui[ 2 ];
+        edx1 = cpui[ 3 ];
+    }
+    if( ids >= 0x7 )
+    {
+        __cpuidex( cpui, 0x7, 0 );
+        ebx7 = cpui[ 1 ];
+        ecx7 = cpui[ 2 ];
+    }
+    if( exIds >= 0x80000001 )
+    {
+        __cpuidex( cpui, 0x80000001, 0 );
+        ecx81 = cpui[ 2 ];
+        edx81 = cpui[ 3 ];
+    }
+    struct FlagItem
+    {
+        unsigned int* reg;
+        int bit;
+        const char* name;
+    };
+    const FlagItem flagItems[] =
+    {
+        { &ecx1, 0, "sse3" },
+        { &ecx1, 1, "pclmulqdq" },
+        { &ecx1, 3, "monitor" },
+        { &ecx1, 9, "ssse3" },
+        { &ecx1, 12, "fma" },
+        { &ecx1, 13, "cpmxch16b" },
+        { &ecx1, 19, "sse41" },
+        { &ecx1, 20, "sse42" },
+        { &ecx1, 22, "movbe" },
+        { &ecx1, 23, "popcnt" },
+        { &ecx1, 25, "aes" },
+        { &ecx1, 26, "xsave" },
+        { &ecx1, 27, "osxsave" },
+        { &ecx1, 28, "avx" },
+        { &ecx1, 29, "f16c" },
+        { &ecx1, 30, "rdrand" },
+        { &edx1, 5, "msr" },
+        { &edx1, 8, "cx8" },
+        { &edx1, 11, "sep" },
+        { &edx1, 15, "cmov" },
+        { &edx1, 19, "clfsh" },
+        { &edx1, 23, "mmx" },
+        { &edx1, 24, "fxsr" },
+        { &edx1, 25, "sse" },
+        { &edx1, 26, "sse2" },
+        { &edx1, 28, "ht" },
+        { &ebx7, 0, "fsgsbase" },
+        { &ebx7, 3, "bmi1" },
+        { &ebx7, 4, "hle" },
+        { &ebx7, 5, "avx2" },
+        { &ebx7, 8, "bmi2" },
+        { &ebx7, 9, "erms" },
+        { &ebx7, 10, "invpcid" },
+        { &ebx7, 11, "rtm" },
+        { &ebx7, 16, "avx512f" },
+        { &ebx7, 18, "rdseed" },
+        { &ebx7, 19, "adx" },
+        { &ebx7, 26, "avx512pf" },
+        { &ebx7, 27, "avx512er" },
+        { &ebx7, 28, "avx512cd" },
+        { &ebx7, 29, "sha" },
+        { &ecx7, 0, "prefetchwt1" },
+        { &ecx81, 0, "lahf" },
+        { &ecx81, 5, "abm" },
+        { &ecx81, 6, "sse4a" },
+        { &ecx81, 11, "xop" },
+        { &ecx81, 21, "tbm" },
+        { &edx81, 11, "syscall" },
+        { &edx81, 22, "mmxext" },
+        { &edx81, 27, "rdtscp" },
+        { &edx81, 30, "3dnowext" },
+        { &edx81, 31, "3dnow" }
+    };
+    OUStringBuffer flags;
+    for( const FlagItem& item : flagItems )
+    {
+        if( *item.reg & ( 1U << item.bit ))
+        {
+            if( !flags.isEmpty())
+                flags.append( " " );
+            flags.appendAscii( item.name );
+        }
+    }
+    if( !flags.isEmpty())
+        addKeyValue( "CPUFlags", flags.makeStringAndClear(), AddItem );
+#endif
+    // Get total memory.
+    MEMORYSTATUSEX memoryStatus;
+    memoryStatus.dwLength = sizeof( memoryStatus );
+    if( GlobalMemoryStatusEx( &memoryStatus ))
+    {
+        addKeyValue( "MemoryTotal", OUString::number( int( memoryStatus.ullTotalPhys / 1024 ))
+            + " kB", AddItem );
+    }
+}
+#else
+void CrashReporter::writeSystemInfo()
+{
+}
+#endif
+
+#endif //HAVE_FEATURE_BREAKPAD
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/desktopcontext.cxx b/desktop/source/app/desktopcontext.cxx
new file mode 100644
index 000000000..5d43bb648
--- /dev/null
+++ b/desktop/source/app/desktopcontext.cxx
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_java.h>
+
+#include "desktopcontext.hxx"
+
+#include <svtools/javainteractionhandler.hxx>
+
+using namespace com::sun::star::uno;
+using namespace com::sun::star::task;
+
+namespace desktop
+{
+DesktopContext::DesktopContext(const Reference<XCurrentContext>& ctx)
+    : m_xNextContext(ctx)
+{
+}
+
+Any SAL_CALL DesktopContext::getValueByName(const OUString& Name)
+{
+    Any retVal;
+
+    if (Name == JAVA_INTERACTION_HANDLER_NAME)
+    {
+#if HAVE_FEATURE_JAVA
+        retVal <<= Reference<XInteractionHandler>(new svt::JavaInteractionHandler());
+#endif
+    }
+    else if (m_xNextContext.is())
+    {
+        // Call next context in chain if found
+        retVal = m_xNextContext->getValueByName(Name);
+    }
+    return retVal;
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/desktopcontext.hxx b/desktop/source/app/desktopcontext.hxx
new file mode 100644
index 000000000..42266a072
--- /dev/null
+++ b/desktop/source/app/desktopcontext.hxx
@@ -0,0 +1,40 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/uno/XCurrentContext.hpp>
+
+namespace desktop
+{
+    class DesktopContext: public cppu::WeakImplHelper< css::uno::XCurrentContext >
+    {
+    public:
+    explicit DesktopContext( const css::uno::Reference< css::uno::XCurrentContext > & ctx);
+
+        // XCurrentContext
+        virtual css::uno::Any SAL_CALL getValueByName( const OUString& Name ) override;
+
+    private:
+            css::uno::Reference< css::uno::XCurrentContext > m_xNextContext;
+    };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/dispatchwatcher.cxx b/desktop/source/app/dispatchwatcher.cxx
new file mode 100644
index 000000000..381507149
--- /dev/null
+++ b/desktop/source/app/dispatchwatcher.cxx
@@ -0,0 +1,832 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <sal/log.hxx>
+#include <sfx2/docfile.hxx>
+#include <sfx2/docfilt.hxx>
+#include <sfx2/fcontnr.hxx>
+#include <svl/fstathelper.hxx>
+
+#include <app.hxx>
+#include "dispatchwatcher.hxx"
+#include "officeipcthread.hxx"
+#include <rtl/ustring.hxx>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/synchronousdispatch.hxx>
+#include <com/sun/star/io/IOException.hpp>
+#include <com/sun/star/util/XCloseable.hpp>
+#include <com/sun/star/util/CloseVetoException.hpp>
+#include <com/sun/star/task/InteractionHandler.hpp>
+#include <com/sun/star/util/URL.hpp>
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/container/XContainerQuery.hpp>
+#include <com/sun/star/container/XEnumeration.hpp>
+#include <com/sun/star/frame/XDispatch.hpp>
+#include <com/sun/star/frame/XNotifyingDispatch.hpp>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/view/XPrintable.hpp>
+#include <com/sun/star/util/URLTransformer.hpp>
+#include <com/sun/star/util/XURLTransformer.hpp>
+#include <com/sun/star/document/MacroExecMode.hpp>
+#include <com/sun/star/document/XTypeDetection.hpp>
+#include <com/sun/star/document/UpdateDocMode.hpp>
+#include <com/sun/star/frame/XStorable.hpp>
+#include <com/sun/star/script/XLibraryContainer2.hpp>
+#include <com/sun/star/document/XEmbeddedScripts.hpp>
+
+#include <comphelper/propertyvalue.hxx>
+#include <comphelper/sequence.hxx>
+#include <tools/diagnose_ex.h>
+#include <tools/urlobj.hxx>
+#include <unotools/mediadescriptor.hxx>
+#include <unotools/tempfile.hxx>
+
+#include <osl/thread.hxx>
+#include <osl/file.hxx>
+#include <iostream>
+#include <string_view>
+#include <utility>
+
+using namespace ::osl;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::util;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::frame;
+using namespace ::com::sun::star::container;
+using namespace ::com::sun::star::beans;
+using namespace ::com::sun::star::view;
+using namespace ::com::sun::star::task;
+using namespace ::com::sun::star::document;
+
+namespace document = ::com::sun::star::document;
+
+namespace desktop
+{
+
+namespace {
+
+struct DispatchHolder
+{
+    DispatchHolder( URL _aURL, Reference< XDispatch > const & rDispatch ) :
+        aURL(std::move( _aURL )), xDispatch( rDispatch ) {}
+
+    URL aURL;
+    Reference< XDispatch > xDispatch;
+};
+
+std::shared_ptr<const SfxFilter> impl_lookupExportFilterForUrl( std::u16string_view rUrl, std::u16string_view rFactory )
+{
+    // create the list of filters
+    OUString sQuery = "getSortedFilterList()"
+        ":module=" +
+        OUString::Concat(rFactory) + // use long name here !
+        ":iflags=" +
+        OUString::number(static_cast<sal_Int32>(SfxFilterFlags::EXPORT)) +
+        ":eflags=" +
+        OUString::number(static_cast<int>(SFX_FILTER_NOTINSTALLED));
+
+    const Reference< XComponentContext > xContext( comphelper::getProcessComponentContext() );
+    const Reference< XContainerQuery > xFilterFactory(
+            xContext->getServiceManager()->createInstanceWithContext( "com.sun.star.document.FilterFactory", xContext ),
+            UNO_QUERY_THROW );
+
+    std::shared_ptr<const SfxFilter> pBestMatch;
+
+    const Reference< XEnumeration > xFilterEnum(
+            xFilterFactory->createSubSetEnumerationByQuery( sQuery ), UNO_SET_THROW );
+    while ( xFilterEnum->hasMoreElements() )
+    {
+        comphelper::SequenceAsHashMap aFilterProps( xFilterEnum->nextElement() );
+        const OUString aName( aFilterProps.getUnpackedValueOrDefault( "Name", OUString() ) );
+        if ( !aName.isEmpty() )
+        {
+            std::shared_ptr<const SfxFilter> pFilter( SfxFilter::GetFilterByName( aName ) );
+            if ( pFilter && pFilter->CanExport() && pFilter->GetWildcard().Matches( rUrl ) )
+            {
+                if ( !pBestMatch || ( SfxFilterFlags::PREFERED & pFilter->GetFilterFlags() ) )
+                    pBestMatch = pFilter;
+            }
+        }
+    }
+
+    return pBestMatch;
+}
+
+std::shared_ptr<const SfxFilter> impl_getExportFilterFromUrl(
+        const OUString& rUrl, const OUString& rFactory)
+{
+    try
+    {
+        const Reference< XComponentContext > xContext( comphelper::getProcessComponentContext() );
+        const Reference< document::XTypeDetection > xTypeDetector(
+            xContext->getServiceManager()->createInstanceWithContext( "com.sun.star.document.TypeDetection", xContext ),
+            UNO_QUERY_THROW );
+        const OUString aTypeName( xTypeDetector->queryTypeByURL( rUrl ) );
+
+        std::shared_ptr<const SfxFilter> pFilter( SfxFilterMatcher( rFactory ).GetFilter4EA( aTypeName, SfxFilterFlags::EXPORT ) );
+        if ( !pFilter )
+            pFilter = impl_lookupExportFilterForUrl( rUrl, rFactory );
+        if ( !pFilter )
+        {
+            OUString aTempName;
+            FileBase::getSystemPathFromFileURL( rUrl, aTempName );
+            OString aSource = OUStringToOString ( aTempName, osl_getThreadTextEncoding() );
+            std::cerr << "Error: no export filter for " << aSource << " found, aborting." << std::endl;
+        }
+
+        return pFilter;
+    }
+    catch ( const Exception& )
+    {
+        return nullptr;
+    }
+}
+
+OUString impl_GuessFilter( const OUString& rUrlOut, const OUString& rDocService )
+{
+    OUString aOutFilter;
+    std::shared_ptr<const SfxFilter> pOutFilter = impl_getExportFilterFromUrl( rUrlOut, rDocService );
+    if (pOutFilter)
+        aOutFilter = pOutFilter->GetFilterName();
+
+    return aOutFilter;
+}
+
+/// dump scripts in a document to the console.
+void scriptCat(const Reference< XModel >& xDoc )
+{
+    Reference< XEmbeddedScripts > xScriptAccess( xDoc, UNO_QUERY );
+    if (!xScriptAccess)
+    {
+        std::cout << "No script access\n";
+        return;
+    }
+
+    // ignore xScriptAccess->getDialogLibraries() for now
+    Reference< css::script::XLibraryContainer2 > xLibraries(
+        xScriptAccess->getBasicLibraries() );
+
+    if ( !xLibraries.is() )
+    {
+        std::cout << "No script libraries\n";
+        return;
+    }
+
+    const Sequence< OUString > aLibNames = xLibraries->getElementNames();
+    std::cout << "Libraries: " << aLibNames.getLength() << "\n";
+    for (OUString const & libName : aLibNames)
+    {
+        std::cout << "Library: '" << libName << "' children: ";
+        Reference< XNameContainer > xContainer;
+        try {
+            if (!xLibraries->isLibraryLoaded( libName ))
+                xLibraries->loadLibrary( libName );
+            xContainer = Reference< XNameContainer >(
+                xLibraries->getByName( libName ), UNO_QUERY );
+        }
+        catch (const css::uno::Exception &e)
+        {
+            std::cout << "[" << libName << "] - failed to load library: " << e.Message << "\n";
+            continue;
+        }
+        if( !xContainer.is() )
+            std::cout << "0\n";
+        else
+        {
+            Sequence< OUString > aObjectNames = xContainer->getElementNames();
+
+            std::cout << aObjectNames.getLength() << "\n\n";
+            for ( sal_Int32 j = 0 ; j < aObjectNames.getLength() ; ++j )
+            {
+                const OUString &rObjectName = aObjectNames[j];
+
+                try
+                {
+                    Any aCode = xContainer->getByName( rObjectName );
+                    OUString aCodeString;
+
+                    if (! (aCode >>= aCodeString ) )
+                        std::cout << "[" << rObjectName << "] - error fetching code\n";
+                    else
+                        std::cout << "[" << rObjectName << "]\n"
+                                  << aCodeString.trim()
+                                  << "\n[/" << rObjectName << "]\n";
+                }
+                catch (const css::uno::Exception &e)
+                {
+                    std::cout << "[" << rObjectName << "] - exception " << e.Message << " fetching code\n";
+                }
+
+                if (j < aObjectNames.getLength() - 1)
+                    std::cout << "\n----------------------------------------------------------\n";
+                std::cout << "\n";
+            }
+        }
+    }
+}
+
+// Perform batch print
+void batchPrint( std::u16string_view rPrinterName, const Reference< XPrintable > &xDoc,
+                 const INetURLObject &aObj, const OUString &aName )
+{
+    OUString aFilterOut;
+    OUString aPrinterName;
+    size_t nPathIndex =  rPrinterName.rfind( ';' );
+    if( nPathIndex != std::u16string_view::npos )
+        aFilterOut=rPrinterName.substr( nPathIndex+1 );
+    if( nPathIndex != 0 )
+        aPrinterName=rPrinterName.substr( 0, nPathIndex );
+
+    INetURLObject aOutFilename( aObj );
+    aOutFilename.SetExtension( u"pdf" );
+    FileBase::getFileURLFromSystemPath( aFilterOut, aFilterOut );
+    OUString aOutFile = aFilterOut + "/" + aOutFilename.getName();
+
+    OUString aTempName;
+    FileBase::getSystemPathFromFileURL( aName, aTempName );
+    OString aSource8 = OUStringToOString ( aTempName, osl_getThreadTextEncoding() );
+    FileBase::getSystemPathFromFileURL( aOutFile, aTempName );
+    OString aTargetURL8 = OUStringToOString(aTempName, osl_getThreadTextEncoding() );
+
+    std::cout << "print " << aSource8 << " -> " << aTargetURL8;
+    std::cout << " using " << (aPrinterName.isEmpty() ? "<default_printer>" : OUStringToOString( aPrinterName, osl_getThreadTextEncoding() ));
+    std::cout << std::endl;
+
+    // create the custom printer, if given
+    Sequence < PropertyValue > aPrinterArgs;
+    if( !aPrinterName.isEmpty() )
+    {
+        aPrinterArgs = { comphelper::makePropertyValue("Name", aPrinterName) };
+        xDoc->setPrinter( aPrinterArgs );
+    }
+
+    // print ( also without user interaction )
+    aPrinterArgs = { comphelper::makePropertyValue("FileName", aOutFile),
+                     comphelper::makePropertyValue("Wait", true) };
+    xDoc->print( aPrinterArgs );
+}
+
+} // anonymous namespace
+
+DispatchWatcher::DispatchWatcher()
+    : m_nRequestCount(0)
+{
+}
+
+
+DispatchWatcher::~DispatchWatcher()
+{
+}
+
+
+bool DispatchWatcher::executeDispatchRequests( const std::vector<DispatchRequest>& aDispatchRequestsList, bool bNoTerminate )
+{
+    Reference< XDesktop2 > xDesktop = css::frame::Desktop::create( ::comphelper::getProcessComponentContext() );
+
+    std::vector< DispatchHolder >   aDispatches;
+    bool                     bSetInputFilter = false;
+    OUString                 aForcedInputFilter;
+
+    for (auto const & aDispatchRequest: aDispatchRequestsList)
+    {
+        // Set Input Filter
+        if ( aDispatchRequest.aRequestType == REQUEST_INFILTER )
+        {
+            bSetInputFilter = true;
+            aForcedInputFilter = aDispatchRequest.aURL;
+            RequestHandler::RequestsCompleted();
+            continue;
+        }
+
+        // create parameter array
+        std::vector<PropertyValue> aArgs;
+
+        // mark request as user interaction from outside
+        aArgs.emplace_back("Referer", 0, Any(OUString("private:OpenEvent")),
+                           PropertyState_DIRECT_VALUE);
+
+        OUString aTarget("_default");
+
+        if ( aDispatchRequest.aRequestType == REQUEST_PRINT ||
+             aDispatchRequest.aRequestType == REQUEST_PRINTTO ||
+             aDispatchRequest.aRequestType == REQUEST_BATCHPRINT ||
+             aDispatchRequest.aRequestType == REQUEST_CONVERSION ||
+             aDispatchRequest.aRequestType == REQUEST_CAT ||
+             aDispatchRequest.aRequestType == REQUEST_SCRIPT_CAT)
+        {
+            // documents opened for printing are opened readonly because they must be opened as a
+            // new document and this document could be open already
+            aArgs.emplace_back("ReadOnly", 0, Any(true), PropertyState_DIRECT_VALUE);
+            // always open a new document for printing, because it must be disposed afterwards
+            aArgs.emplace_back("OpenNewView", 0, Any(true), PropertyState_DIRECT_VALUE);
+            // printing is done in a hidden view
+            aArgs.emplace_back("Hidden", 0, Any(true), PropertyState_DIRECT_VALUE);
+            // load document for printing without user interaction
+            aArgs.emplace_back("Silent", 0, Any(true), PropertyState_DIRECT_VALUE);
+
+            // hidden documents should never be put into open tasks
+            aTarget = "_blank";
+        }
+        else
+        {
+            Reference < XInteractionHandler2 > xInteraction(
+                InteractionHandler::createWithParent(::comphelper::getProcessComponentContext(), nullptr) );
+
+            aArgs.emplace_back("InteractionHandler", 0, Any(xInteraction),
+                               PropertyState_DIRECT_VALUE);
+
+            aArgs.emplace_back("MacroExecutionMode", 0,
+                               Any(css::document::MacroExecMode::USE_CONFIG),
+                               PropertyState_DIRECT_VALUE);
+
+            aArgs.emplace_back("UpdateDocMode", 0,
+                               Any(css::document::UpdateDocMode::ACCORDING_TO_CONFIG),
+                               PropertyState_DIRECT_VALUE);
+        }
+
+        if ( !aDispatchRequest.aPreselectedFactory.isEmpty() )
+        {
+            aArgs.emplace_back(utl::MediaDescriptor::PROP_DOCUMENTSERVICE, 0,
+                               Any(aDispatchRequest.aPreselectedFactory),
+                               PropertyState_DIRECT_VALUE);
+        }
+
+        OUString aName( GetURL_Impl( aDispatchRequest.aURL, aDispatchRequest.aCwdUrl ) );
+
+        // load the document ... if they are loadable!
+        // Otherwise try to dispatch it ...
+        Reference < XPrintable > xDoc;
+        if(
+            ( aName.startsWith( ".uno" ) )  ||
+            ( aName.startsWith( "slot:" ) )  ||
+            ( aName.startsWith( "macro:" ) )  ||
+            ( aName.startsWith("vnd.sun.star.script") )
+          )
+        {
+            // Attention: URL must be parsed full. Otherwise some detections on it will fail!
+            // It doesn't matter, if parser isn't available. Because; We try loading of URL then ...
+            URL             aURL ;
+            aURL.Complete = aName;
+
+            Reference < XDispatch >         xDispatcher ;
+            Reference < XURLTransformer >   xParser     ( URLTransformer::create(::comphelper::getProcessComponentContext()) );
+
+            if( xParser.is() )
+                xParser->parseStrict( aURL );
+
+            xDispatcher = xDesktop->queryDispatch( aURL, OUString(), 0 );
+            SAL_WARN_IF(
+                !xDispatcher.is(), "desktop.app",
+                "unsupported dispatch request <" << aName << ">");
+            if( xDispatcher.is() )
+            {
+                {
+                    osl::MutexGuard aGuard(m_mutex);
+                    // Remember request so we can find it in statusChanged!
+                    m_nRequestCount++;
+                }
+
+                // Use local vector to store dispatcher because we have to fill our request container before
+                // we can dispatch. Otherwise it would be possible that statusChanged is called before we dispatched all requests!!
+                aDispatches.emplace_back( aURL, xDispatcher );
+            }
+        }
+        else if ( aName.startsWith( "service:" ) )
+        {
+            // TODO: the dispatch has to be done for loadComponentFromURL as well.
+            URL             aURL ;
+            aURL.Complete = aName;
+
+            Reference < XDispatch >         xDispatcher ;
+            Reference < XURLTransformer >   xParser     ( URLTransformer::create(::comphelper::getProcessComponentContext()) );
+
+            if( xParser.is() )
+                xParser->parseStrict( aURL );
+
+            xDispatcher = xDesktop->queryDispatch( aURL, OUString(), 0 );
+
+            if( xDispatcher.is() )
+            {
+                try
+                {
+                    // We have to be listener to catch errors during dispatching URLs.
+                    // Otherwise it would be possible to have an office running without an open
+                    // window!!
+                    Sequence < PropertyValue > aArgs2{ comphelper::makePropertyValue("SynchronMode",
+                                                                                     true) };
+                    Reference < XNotifyingDispatch > xDisp( xDispatcher, UNO_QUERY );
+                    if ( xDisp.is() )
+                        xDisp->dispatchWithNotification( aURL, aArgs2, this );
+                    else
+                        xDispatcher->dispatch( aURL, aArgs2 );
+                }
+                catch (const css::uno::Exception&)
+                {
+                    TOOLS_WARN_EXCEPTION(
+                        "desktop.app",
+                        "Desktop::OpenDefault() ignoring Exception while calling XNotifyingDispatch");
+                }
+            }
+        }
+        else
+        {
+            INetURLObject aObj( aName );
+            if ( aObj.GetProtocol() == INetProtocol::PrivSoffice )
+                aTarget = "_default";
+
+            // Set "AsTemplate" argument according to request type
+            if ( aDispatchRequest.aRequestType == REQUEST_FORCENEW ||
+                 aDispatchRequest.aRequestType == REQUEST_FORCEOPEN     )
+            {
+                aArgs.emplace_back("AsTemplate", 0,
+                                   Any(aDispatchRequest.aRequestType == REQUEST_FORCENEW),
+                                   PropertyState_DIRECT_VALUE);
+            }
+
+            // if we are called in viewmode, open document read-only
+            if(aDispatchRequest.aRequestType == REQUEST_VIEW) {
+                aArgs.emplace_back("ReadOnly", 0, Any(true), PropertyState_DIRECT_VALUE);
+            }
+
+            // if we are called with --show set Start in mediadescriptor
+            if(aDispatchRequest.aRequestType == REQUEST_START) {
+                aArgs.emplace_back("StartPresentation", 0, Any(true), PropertyState_DIRECT_VALUE);
+            }
+
+            // Force input filter, if possible
+            if( bSetInputFilter )
+            {
+                sal_Int32 nFilterOptionsIndex = 0;
+                aArgs.emplace_back("FilterName", 0,
+                                   Any(aForcedInputFilter.getToken(0, ':', nFilterOptionsIndex)),
+                                   PropertyState_DIRECT_VALUE);
+
+                if (0 < nFilterOptionsIndex)
+                {
+                    aArgs.emplace_back("FilterOptions", 0,
+                                       Any(aForcedInputFilter.copy(nFilterOptionsIndex)),
+                                       PropertyState_DIRECT_VALUE);
+                }
+            }
+
+            // This is a synchron loading of a component so we don't have to deal with our statusChanged listener mechanism.
+            try
+            {
+                xDoc.set(comphelper::SynchronousDispatch::dispatch(
+                             xDesktop, aName, aTarget, comphelper::containerToSequence(aArgs)),
+                         UNO_QUERY);
+            }
+            catch (const css::lang::IllegalArgumentException&)
+            {
+                TOOLS_WARN_EXCEPTION(
+                    "desktop.app",
+                    "Dispatchwatcher IllegalArgumentException while calling loadComponentFromURL");
+            }
+            catch (const css::io::IOException&)
+            {
+                TOOLS_WARN_EXCEPTION(
+                    "desktop.app",
+                    "Dispatchwatcher IOException while calling loadComponentFromURL");
+            }
+            if ( aDispatchRequest.aRequestType == REQUEST_OPEN ||
+                 aDispatchRequest.aRequestType == REQUEST_VIEW ||
+                 aDispatchRequest.aRequestType == REQUEST_START ||
+                 aDispatchRequest.aRequestType == REQUEST_FORCEOPEN ||
+                 aDispatchRequest.aRequestType == REQUEST_FORCENEW      )
+            {
+                // request is completed
+                RequestHandler::RequestsCompleted();
+            }
+            else if ( aDispatchRequest.aRequestType == REQUEST_PRINT ||
+                      aDispatchRequest.aRequestType == REQUEST_PRINTTO ||
+                      aDispatchRequest.aRequestType == REQUEST_BATCHPRINT ||
+                      aDispatchRequest.aRequestType == REQUEST_CONVERSION ||
+                      aDispatchRequest.aRequestType == REQUEST_CAT ||
+                      aDispatchRequest.aRequestType == REQUEST_SCRIPT_CAT )
+            {
+                if ( xDoc.is() )
+                {
+                    // Do we need to save the document in a different format?
+                    if ( aDispatchRequest.aRequestType == REQUEST_CONVERSION ||
+                         aDispatchRequest.aRequestType == REQUEST_CAT )
+                    {
+// FIXME: factor out into a method ...
+                        Reference< XStorable > xStorable( xDoc, UNO_QUERY );
+                        if ( xStorable.is() ) {
+                            OUString aParam = aDispatchRequest.aPrinterName;
+                            sal_Int32 nPathIndex =  aParam.lastIndexOf( ';' );
+                            sal_Int32 nFilterIndex = aParam.indexOf( ':' );
+                            sal_Int32 nImgFilterIndex = aParam.lastIndexOf( '|' );
+                            if( nPathIndex < nFilterIndex )
+                                nFilterIndex = -1;
+
+                            OUString aFilterOut;
+                            OUString aImgOut;
+                            OUString aFilter;
+                            OUString aFilterExt;
+                            bool bGuess = false;
+
+                            if( nFilterIndex >= 0 )
+                            {
+                                aFilter = aParam.copy( nFilterIndex+1, nPathIndex-nFilterIndex-1 );
+                                aFilterExt = aParam.copy( 0, nFilterIndex );
+                            }
+                            else
+                            {
+                                // Guess
+                                bGuess = true;
+                                aFilterExt = aParam.copy( 0, nPathIndex );
+                            }
+
+                            if( nImgFilterIndex >= 0 )
+                            {
+                                aImgOut = aParam.copy( nImgFilterIndex+1 );
+                                aFilterOut = aParam.copy( nPathIndex+1, nImgFilterIndex-nPathIndex-1 );
+                            }
+                            else
+                                aFilterOut = aParam.copy( nPathIndex+1 );
+
+                            FileBase::getFileURLFromSystemPath( aFilterOut, aFilterOut );
+                            INetURLObject aOutFilename(aFilterOut);
+                            aOutFilename.Append(aObj.getName(INetURLObject::LAST_SEGMENT, true,
+                                                             INetURLObject::DecodeMechanism::NONE));
+                            aOutFilename.SetExtension(aFilterExt);
+                            OUString aOutFile
+                                = aOutFilename.GetMainURL(INetURLObject::DecodeMechanism::NONE);
+
+                            std::unique_ptr<utl::TempFile> fileForCat;
+                            if( aDispatchRequest.aRequestType == REQUEST_CAT )
+                            {
+                                fileForCat = std::make_unique<utl::TempFile>();
+                                if (fileForCat->IsValid())
+                                    fileForCat->EnableKillingFile();
+                                else
+                                    std::cerr << "Error: Cannot create temporary file..." << std::endl ;
+                                aOutFile = fileForCat->GetURL();
+                            }
+
+                            if ( bGuess )
+                            {
+                                OUString aDocService;
+                                Reference< XModel > xModel( xDoc, UNO_QUERY );
+                                if ( xModel.is() )
+                                {
+                                    utl::MediaDescriptor aMediaDesc( xModel->getArgs() );
+                                    aDocService = aMediaDesc.getUnpackedValueOrDefault(utl::MediaDescriptor::PROP_DOCUMENTSERVICE, OUString() );
+                                }
+                                aFilter = impl_GuessFilter( aOutFile, aDocService );
+                            }
+
+                            bool bMultiFileTarget = false;
+
+                            if (aFilter.isEmpty())
+                            {
+                                std::cerr << "Error: no export filter" << std::endl;
+                            }
+                            else
+                            {
+                                sal_Int32 nFilterOptionsIndex = aFilter.indexOf(':');
+                                sal_Int32 nProps = ( 0 < nFilterOptionsIndex ) ? 4 : 3;
+
+                                if ( !aImgOut.isEmpty() )
+                                    nProps +=1;
+                                Sequence<PropertyValue> conversionProperties( nProps );
+                                auto pconversionProperties = conversionProperties.getArray();
+                                pconversionProperties[0].Name = "ConversionRequestOrigin";
+                                pconversionProperties[0].Value <<= OUString("CommandLine");
+                                pconversionProperties[1].Name = "Overwrite";
+                                pconversionProperties[1].Value <<= true;
+
+                                pconversionProperties[2].Name = "FilterName";
+                                if( 0 < nFilterOptionsIndex )
+                                {
+                                    OUString sFilterName = aFilter.copy(0, nFilterOptionsIndex);
+                                    OUString sFilterOptions = aFilter.copy(nFilterOptionsIndex + 1);
+
+                                    if (sFilterName == "Text - txt - csv (StarCalc)")
+                                    {
+                                        sal_Int32 nIdx(0);
+                                        // If the 11th token is '-1' then we export a file
+                                        // per sheet where the file name is based on the suggested
+                                        // output filename concatenated with the sheet name, so adjust
+                                        // the output and overwrite messages
+                                        // If the 11th token is not present or numeric 0 then the
+                                        // default sheet is exported with the output filename. If it
+                                        // is numeric >0 then that sheet (1-based) with the output
+                                        // filename concatenated with the sheet name. So even if
+                                        // that is a single file, the multi file target mechanism is
+                                        // used.
+                                        const OUString aTok(sFilterOptions.getToken(11, ',', nIdx));
+                                        // Actual validity is checked in Calc, here just check for
+                                        // presence of numeric value at start.
+                                        bMultiFileTarget = (!aTok.isEmpty() && aTok.toInt32() != 0);
+                                    }
+
+                                    pconversionProperties[2].Value <<= sFilterName;
+
+                                    pconversionProperties[3].Name = "FilterOptions";
+                                    pconversionProperties[3].Value <<= sFilterOptions;
+                                }
+                                else
+                                {
+                                    pconversionProperties[2].Value <<= aFilter;
+                                }
+
+                                if ( !aImgOut.isEmpty() )
+                                {
+                                    assert(conversionProperties[nProps-1].Name.isEmpty());
+                                    pconversionProperties[nProps-1].Name = "ImageFilter";
+                                    pconversionProperties[nProps-1].Value <<= aImgOut;
+                                }
+
+                                OUString aTempName;
+                                FileBase::getSystemPathFromFileURL(aName, aTempName);
+                                OString aSource8 = OUStringToOString(aTempName, osl_getThreadTextEncoding());
+                                FileBase::getSystemPathFromFileURL(aOutFile, aTempName);
+                                OString aTargetURL8 = OUStringToOString(aTempName, osl_getThreadTextEncoding());
+                                if (aDispatchRequest.aRequestType != REQUEST_CAT)
+                                {
+                                    std::cout << "convert " << aSource8;
+                                    if (!bMultiFileTarget)
+                                        std::cout << " -> " << aTargetURL8;
+                                    std::cout << " using filter : " << OUStringToOString(aFilter, osl_getThreadTextEncoding()) << std::endl;
+                                    if (!bMultiFileTarget && FStatHelper::IsDocument(aOutFile))
+                                        std::cout << "Overwriting: " << OUStringToOString(aTempName, osl_getThreadTextEncoding()) << std::endl ;
+                                }
+                                try
+                                {
+                                    xStorable->storeToURL(aOutFile, conversionProperties);
+                                }
+                                catch (const Exception& rException)
+                                {
+                                    std::cerr << "Error: Please verify input parameters...";
+                                    if (!rException.Message.isEmpty())
+                                        std::cerr << " (" << rException.Message << ")";
+                                    std::cerr << std::endl;
+                                }
+
+                                if (fileForCat && fileForCat->IsValid())
+                                {
+                                    SvStream* aStream = fileForCat->GetStream(StreamMode::STD_READ);
+                                    while (aStream->good())
+                                    {
+                                        OString aStr;
+                                        aStream->ReadLine(aStr, SAL_MAX_INT32);
+                                        for (sal_Int32 i = 0; i < aStr.getLength(); ++i)
+                                        {
+                                            std::cout << aStr[i];
+                                        }
+                                        std::cout << std::endl;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    else if ( aDispatchRequest.aRequestType == REQUEST_SCRIPT_CAT )
+                    {
+                        Reference< XModel > xModel( xDoc, UNO_QUERY );
+                        if( xModel.is() )
+                            scriptCat( xModel );
+                    }
+                    else if ( aDispatchRequest.aRequestType == REQUEST_BATCHPRINT )
+                    {
+                        batchPrint( aDispatchRequest.aPrinterName, xDoc, aObj, aName );
+                    }
+                    else
+                    {
+                        if ( aDispatchRequest.aRequestType == REQUEST_PRINTTO )
+                        {
+                            // create the printer
+                            Sequence < PropertyValue > aPrinterArgs{ comphelper::makePropertyValue(
+                                "Name", aDispatchRequest.aPrinterName) };
+                            xDoc->setPrinter( aPrinterArgs );
+                        }
+
+                        // print ( also without user interaction )
+                        Sequence < PropertyValue > aPrinterArgs{ comphelper::makePropertyValue("Wait",
+                                                                                               true) };
+                        xDoc->print( aPrinterArgs );
+                    }
+                }
+                else
+                {
+                    std::cerr << "Error: source file could not be loaded" << std::endl;
+                }
+
+                // remove the document
+                try
+                {
+                    Reference < XCloseable > xClose( xDoc, UNO_QUERY );
+                    if ( xClose.is() )
+                        xClose->close( true );
+                    else
+                    {
+                        Reference < XComponent > xComp( xDoc, UNO_QUERY );
+                        if ( xComp.is() )
+                            xComp->dispose();
+                    }
+                }
+                catch (const css::util::CloseVetoException&)
+                {
+                }
+
+                // request is completed
+                RequestHandler::RequestsCompleted();
+            }
+        }
+    }
+
+    if ( !aDispatches.empty() )
+    {
+        // Execute all asynchronous dispatches now after we placed them into our request container!
+        Sequence < PropertyValue > aArgs{
+            comphelper::makePropertyValue("Referer", OUString("private:OpenEvent")),
+            comphelper::makePropertyValue("SynchronMode", true)
+        };
+
+        for (const DispatchHolder & aDispatche : aDispatches)
+        {
+            Reference< XDispatch > xDispatch = aDispatche.xDispatch;
+            Reference < XNotifyingDispatch > xDisp( xDispatch, UNO_QUERY );
+            if ( xDisp.is() )
+                xDisp->dispatchWithNotification( aDispatche.aURL, aArgs, this );
+            else
+            {
+                {
+                    osl::MutexGuard aGuard(m_mutex);
+                    m_nRequestCount--;
+                }
+                xDispatch->dispatch( aDispatche.aURL, aArgs );
+            }
+        }
+    }
+
+    ::osl::ClearableMutexGuard aGuard(m_mutex);
+    bool bEmpty = (m_nRequestCount == 0);
+    aGuard.clear();
+
+    // No more asynchronous requests?
+    // The requests are removed from the request container after they called back to this
+    // implementation via statusChanged!!
+    if ( bEmpty && !bNoTerminate /*m_aRequestContainer.empty()*/ )
+    {
+        // We have to check if we have an open task otherwise we have to shutdown the office.
+        Reference< XElementAccess > xList = xDesktop->getFrames();
+
+        if ( !xList->hasElements() )
+        {
+            // We don't have any task open so we have to shutdown ourself!!
+            return xDesktop->terminate();
+        }
+    }
+
+    return false;
+}
+
+
+void SAL_CALL DispatchWatcher::disposing( const css::lang::EventObject& )
+{
+}
+
+
+void SAL_CALL DispatchWatcher::dispatchFinished( const DispatchResultEvent& )
+{
+    osl::ClearableMutexGuard aGuard(m_mutex);
+    sal_Int16 nCount = --m_nRequestCount;
+    aGuard.clear();
+    RequestHandler::RequestsCompleted();
+    if ( !nCount && !RequestHandler::AreRequestsPending() )
+    {
+        // We have to check if we have an open task otherwise we have to shutdown the office.
+        Reference< XDesktop2 > xDesktop = css::frame::Desktop::create( ::comphelper::getProcessComponentContext() );
+        Reference< XElementAccess > xList = xDesktop->getFrames();
+
+        if ( !xList->hasElements() )
+        {
+            // We don't have any task open so we have to shutdown ourself!!
+            xDesktop->terminate();
+        }
+    }
+}
+
+} // namespace desktop
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/dispatchwatcher.hxx b/desktop/source/app/dispatchwatcher.hxx
new file mode 100644
index 000000000..221cac915
--- /dev/null
+++ b/desktop/source/app/dispatchwatcher.hxx
@@ -0,0 +1,87 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/frame/XDispatchResultListener.hpp>
+#include <optional>
+
+#include <vector>
+
+namespace desktop
+{
+
+/*
+    Class for controls dispatching of command URL through office command line. There
+    are "dangerous" command URLs, that can result in a running office without UI. To prevent
+    this situation the implementation monitors all dispatches and looks for an open task if
+    there is arose a problem. If there is none the office will be shutdown to prevent a
+    running office without UI.
+*/
+class DispatchWatcher : public ::cppu::WeakImplHelper< css::frame::XDispatchResultListener >
+{
+    public:
+        enum RequestType
+        {
+            REQUEST_OPEN,
+            REQUEST_VIEW,
+            REQUEST_START,
+            REQUEST_PRINT,
+            REQUEST_PRINTTO,
+            REQUEST_FORCEOPEN,
+            REQUEST_FORCENEW,
+            REQUEST_CONVERSION,
+            REQUEST_INFILTER,
+            REQUEST_BATCHPRINT,
+            REQUEST_CAT,
+            REQUEST_SCRIPT_CAT
+        };
+
+        struct DispatchRequest
+        {
+            RequestType aRequestType;
+            OUString    aURL;
+            std::optional< OUString > aCwdUrl;
+            OUString    aPrinterName;  // also conversion params
+            OUString    aPreselectedFactory;
+        };
+
+        DispatchWatcher();
+
+        virtual ~DispatchWatcher() override;
+
+        // XEventListener
+        virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+        // XDispachResultListener
+        virtual void SAL_CALL dispatchFinished( const css::frame::DispatchResultEvent& aEvent ) override;
+
+        // execute new dispatch request
+        bool executeDispatchRequests( const std::vector<DispatchRequest>& aDispatches, bool bNoTerminate );
+
+    private:
+        osl::Mutex m_mutex;
+
+        sal_Int16                   m_nRequestCount;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/langselect.cxx b/desktop/source/app/langselect.cxx
new file mode 100644
index 000000000..8a07e26c3
--- /dev/null
+++ b/desktop/source/app/langselect.cxx
@@ -0,0 +1,148 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/lang/XLocalizable.hpp>
+#include <com/sun/star/uno/Exception.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <comphelper/configuration.hxx>
+#include <comphelper/processfactory.hxx>
+#include <i18nlangtag/lang.h>
+#include <i18nlangtag/languagetag.hxx>
+#include <i18nlangtag/mslangid.hxx>
+#include <officecfg/Office/Linguistic.hxx>
+#include <officecfg/Setup.hxx>
+#include <officecfg/System.hxx>
+#include <rtl/ustring.hxx>
+#include <svl/languageoptions.hxx>
+#include <svtools/langhelp.hxx>
+#include <tools/diagnose_ex.h>
+
+#include <app.hxx>
+
+#include "cmdlineargs.hxx"
+#include "langselect.hxx"
+
+namespace desktop::langselect {
+
+namespace {
+
+void setMsLangIdFallback(OUString const & locale) {
+    // #i32939# setting of default document language
+    // See #i42730# for rules for determining source of settings
+    if (locale.isEmpty())
+        return;
+
+    LanguageType type = LanguageTag::convertToLanguageTypeWithFallback(locale);
+    switch (SvtLanguageOptions::GetScriptTypeOfLanguage(type)) {
+    case SvtScriptType::ASIAN:
+        MsLangId::setConfiguredAsianFallback(type);
+        break;
+    case SvtScriptType::COMPLEX:
+        MsLangId::setConfiguredComplexFallback(type);
+        break;
+    default:
+        MsLangId::setConfiguredWesternFallback(type);
+        break;
+    }
+}
+
+}
+
+bool prepareLocale() {
+    // #i42730# Get the windows 16Bit locale, it should be preferred over the UI
+    // locale:
+    setMsLangIdFallback(officecfg::System::L10N::SystemLocale::get());
+    // #i32939# Use system locale to set document default locale:
+    setMsLangIdFallback(officecfg::System::L10N::Locale::get());
+    css::uno::Sequence<OUString> inst(
+        officecfg::Setup::Office::InstalledLocales::get()->getElementNames());
+    OUString locale(officecfg::Office::Linguistic::General::UILocale::get());
+    if (!locale.isEmpty()) {
+        locale = getInstalledLocaleForLanguage(inst, locale);
+        if (locale.isEmpty()) {
+            // Selected language is not/no longer installed:
+            try {
+                std::shared_ptr<comphelper::ConfigurationChanges> batch(
+                    comphelper::ConfigurationChanges::create());
+                officecfg::Office::Linguistic::General::UILocale::set(
+                    "", batch);
+                batch->commit();
+            } catch (const css::uno::Exception &) {
+                TOOLS_WARN_EXCEPTION("desktop.app", "ignoring");
+            }
+        }
+    }
+    if (locale.isEmpty()) {
+        locale = getInstalledLocaleForLanguage(
+            inst, Desktop::GetCommandLineArgs().GetLanguage());
+    }
+    if (locale.isEmpty()) {
+        locale = getInstalledLocaleForSystemUILanguage(inst, true);
+    }
+    if (locale.isEmpty()) {
+        return false;
+    }
+    LanguageTag tag(locale);
+    // Prepare default config provider by localizing it to the selected
+    // locale this will ensure localized configuration settings to be
+    // selected according to the UI language:
+    css::uno::Reference<css::lang::XLocalizable>(
+        css::configuration::theDefaultProvider::get(
+            comphelper::getProcessComponentContext()),
+        css::uno::UNO_QUERY_THROW)->setLocale(tag.getLocale(false));
+    try {
+        std::shared_ptr<comphelper::ConfigurationChanges> batch(
+            comphelper::ConfigurationChanges::create());
+        officecfg::Setup::L10N::ooLocale::set(locale, batch);
+        batch->commit();
+    } catch (const css::uno::Exception &) {
+        TOOLS_WARN_EXCEPTION("desktop.app", "ignoring");
+    }
+    MsLangId::setConfiguredSystemUILanguage(tag.getLanguageType(false));
+
+    // Note the system language/locale here may or may not be correct before we
+    // actually set it below. It is what could be figured from the system
+    // setting and may only partially match, like "en" for an unsupported
+    // English locale.
+    LanguageTag aSysLocTag( MsLangId::getSystemLanguage());
+    OUString setupSysLoc(officecfg::Setup::L10N::ooSetupSystemLocale::get());
+    if (!setupSysLoc.isEmpty())
+        aSysLocTag.reset( setupSysLoc);
+    // Ensure the system locale is set to a known supported locale.
+    aSysLocTag.makeFallback();
+    LanguageTag::setConfiguredSystemLanguage( aSysLocTag.getLanguageType(false));
+
+    // #i32939# setting of default document locale
+    // #i32939# this should not be based on the UI language
+    // So obtain the system locale now configured just above and pass it on,
+    // resolved of course.
+    LanguageTag docTag(LANGUAGE_SYSTEM);
+    setMsLangIdFallback(docTag.getBcp47());
+
+    return true;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/langselect.hxx b/desktop/source/app/langselect.hxx
new file mode 100644
index 000000000..496f67570
--- /dev/null
+++ b/desktop/source/app/langselect.hxx
@@ -0,0 +1,29 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+namespace desktop::langselect
+{
+bool prepareLocale();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/lockfile2.cxx b/desktop/source/app/lockfile2.cxx
new file mode 100644
index 000000000..44447927f
--- /dev/null
+++ b/desktop/source/app/lockfile2.cxx
@@ -0,0 +1,60 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <vcl/svapp.hxx>
+#include <vcl/weld.hxx>
+#include <dp_shared.hxx>
+#include <strings.hrc>
+#include <tools/config.hxx>
+#include <lockfile.hxx>
+
+namespace desktop {
+
+bool Lockfile_execWarning( Lockfile const * that )
+{
+    // read information from lock
+    OUString aLockname = that->m_aLockname;
+    Config aConfig(aLockname);
+    aConfig.SetGroup( LOCKFILE_GROUP );
+    OString aHost  = aConfig.ReadKey( LOCKFILE_HOSTKEY );
+    OString aUser  = aConfig.ReadKey( LOCKFILE_USERKEY );
+    OString aTime  = aConfig.ReadKey( LOCKFILE_TIMEKEY );
+
+    // display warning and return response
+    std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(nullptr,
+                                              VclMessageType::Question, VclButtonsType::YesNo, DpResId(STR_QUERY_USERDATALOCKED)));
+    // set box title
+    OUString aTitle = DpResId(STR_TITLE_USERDATALOCKED);
+    xBox->set_title( aTitle );
+    // insert values...
+    OUString aMsgText = xBox->get_primary_text();
+    aMsgText = aMsgText.replaceFirst(
+        "$u", OStringToOUString( aUser, RTL_TEXTENCODING_ASCII_US) );
+    aMsgText = aMsgText.replaceFirst(
+        "$h", OStringToOUString( aHost, RTL_TEXTENCODING_ASCII_US) );
+    aMsgText = aMsgText.replaceFirst(
+        "$t", OStringToOUString( aTime, RTL_TEXTENCODING_ASCII_US) );
+    xBox->set_primary_text(aMsgText);
+    // do it
+    return xBox->run() == RET_YES;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/main.c b/desktop/source/app/main.c
new file mode 100644
index 000000000..fdd2eb350
--- /dev/null
+++ b/desktop/source/app/main.c
@@ -0,0 +1,62 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/main.h>
+
+#include "sofficemain.h"
+
+#ifndef NOTEST_xmlCleanupParser
+#ifdef DBG_UTIL
+#ifdef __gnu_linux__
+#include <stdio.h>
+#include <stdlib.h>
+
+static int g_Exiting = 0;
+
+/* HACK: detect calls to xmlCleanupParser, which causes hard to debug crashes */
+__attribute__((visibility("default"))) void xmlCleanupParser(void)
+{
+    /* there are libraries that register xmlCleanupParser as an atexit handler,
+       which is not entirely sound (another atexit handler could want to
+       use libxml), but not enough of a problem to complain.
+       (example found by llunak: KDE's Strigi library) */
+    if (!g_Exiting)
+    {
+        fprintf(stderr, "\n*** ERROR: DO NOT call xmlCleanupParser()\n\n");
+        abort();
+    }
+}
+#endif
+#endif
+#endif // NOTEST_xmlCleanupParser
+
+SAL_IMPLEMENT_MAIN()
+{
+    int ret = soffice_main();
+#ifndef NOTEST_xmlCleanupParser
+#ifdef DBG_UTIL
+#ifdef __gnu_linux__
+    g_Exiting = 1;
+#endif
+#endif
+#endif
+    return ret;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/officeipcthread.cxx b/desktop/source/app/officeipcthread.cxx
new file mode 100644
index 000000000..e559f7253
--- /dev/null
+++ b/desktop/source/app/officeipcthread.cxx
@@ -0,0 +1,1369 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <config_dbus.h>
+#include <config_features.h>
+#include <config_feature_desktop.h>
+
+#include <app.hxx>
+#include "officeipcthread.hxx"
+#include "cmdlineargs.hxx"
+#include "dispatchwatcher.hxx"
+#include <com/sun/star/frame/TerminationVetoException.hpp>
+#include <salhelper/thread.hxx>
+#include <sal/log.hxx>
+#include <unotools/bootstrap.hxx>
+#include <utility>
+#include <vcl/svapp.hxx>
+#include <unotools/configmgr.hxx>
+#include <osl/pipe.hxx>
+#include <rtl/digest.h>
+#include <rtl/ustrbuf.hxx>
+#include <osl/conditn.hxx>
+#include <unotools/moduleoptions.hxx>
+#include <rtl/strbuf.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <osl/file.hxx>
+#include <rtl/process.h>
+#include <o3tl/string_view.hxx>
+
+#include <cassert>
+#include <cstdlib>
+#include <memory>
+
+#if ENABLE_DBUS
+#include <dbus/dbus.h>
+#include <sys/socket.h>
+#endif
+
+using namespace desktop;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::frame;
+
+namespace {
+
+char const ARGUMENT_PREFIX[] = "InternalIPC::Arguments";
+char const SEND_ARGUMENTS[] = "InternalIPC::SendArguments";
+char const PROCESSING_DONE[] = "InternalIPC::ProcessingDone";
+
+// Receives packets from the pipe until a packet ends in a NUL character (that
+// will not be included in the returned string) or it cannot read anything (due
+// to error or closed pipe, in which case an empty string will be returned to
+// signal failure):
+OString readStringFromPipe(osl::StreamPipe const & pipe) {
+    for (OStringBuffer str;;) {
+        char buf[1024];
+        sal_Int32 n = pipe.recv(buf, SAL_N_ELEMENTS(buf));
+        if (n <= 0) {
+            SAL_INFO("desktop.app", "read empty string");
+            return "";
+        }
+        bool end = false;
+        if (buf[n - 1] == '\0') {
+            end = true;
+            --n;
+        }
+        str.append(buf, n);
+            //TODO: how does OStringBuffer.append handle overflow?
+        if (end) {
+            auto s = str.makeStringAndClear();
+            SAL_INFO("desktop.app", "read <" << s << ">");
+            return s;
+        }
+    }
+}
+
+}
+
+namespace desktop
+{
+
+namespace {
+
+class Parser: public CommandLineArgs::Supplier {
+public:
+    explicit Parser(OString input): m_input(std::move(input)) {
+        if (!m_input.match(ARGUMENT_PREFIX) ||
+            m_input.getLength() == RTL_CONSTASCII_LENGTH(ARGUMENT_PREFIX))
+        {
+            throw CommandLineArgs::Supplier::Exception();
+        }
+        m_index = RTL_CONSTASCII_LENGTH(ARGUMENT_PREFIX);
+        switch (m_input[m_index++]) {
+        case '0':
+            break;
+        case '1':
+            {
+                OUString url;
+                if (!next(&url, false)) {
+                    throw CommandLineArgs::Supplier::Exception();
+                }
+                m_cwdUrl = url;
+                break;
+            }
+        case '2':
+            {
+                OUString path;
+                if (!next(&path, false)) {
+                    throw CommandLineArgs::Supplier::Exception();
+                }
+                OUString url;
+                if (osl::FileBase::getFileURLFromSystemPath(path, url) ==
+                    osl::FileBase::E_None)
+                {
+                    m_cwdUrl = url;
+                }
+                break;
+            }
+        default:
+            throw CommandLineArgs::Supplier::Exception();
+        }
+    }
+
+    virtual std::optional< OUString > getCwdUrl() override { return m_cwdUrl; }
+
+    virtual bool next(OUString * argument) override { return next(argument, true); }
+
+private:
+    bool next(OUString * argument, bool prefix) {
+        OSL_ASSERT(argument != nullptr);
+        if (m_index < m_input.getLength()) {
+            if (prefix) {
+                if (m_input[m_index] != ',') {
+                    throw CommandLineArgs::Supplier::Exception();
+                }
+                ++m_index;
+            }
+            OStringBuffer b;
+            while (m_index < m_input.getLength()) {
+                char c = m_input[m_index];
+                if (c == ',') {
+                    break;
+                }
+                ++m_index;
+                if (c == '\\') {
+                    if (m_index >= m_input.getLength())
+                        throw CommandLineArgs::Supplier::Exception();
+                    c = m_input[m_index++];
+                    switch (c) {
+                    case '0':
+                        c = '\0';
+                        break;
+                    case ',':
+                    case '\\':
+                        break;
+                    default:
+                        throw CommandLineArgs::Supplier::Exception();
+                    }
+                }
+                b.append(c);
+            }
+            OString b2(b.makeStringAndClear());
+            if (!rtl_convertStringToUString(
+                    &argument->pData, b2.getStr(), b2.getLength(),
+                    RTL_TEXTENCODING_UTF8,
+                    (RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_ERROR |
+                     RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_ERROR |
+                     RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR)))
+            {
+                throw CommandLineArgs::Supplier::Exception();
+            }
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    std::optional< OUString > m_cwdUrl;
+    OString m_input;
+    sal_Int32 m_index;
+};
+
+bool addArgument(OStringBuffer &rArguments, char prefix,
+    const OUString &rArgument)
+{
+    OString utf8;
+    if (!rArgument.convertToString(
+            &utf8, RTL_TEXTENCODING_UTF8,
+            (RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR |
+             RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR)))
+    {
+        return false;
+    }
+    rArguments.append(prefix);
+    for (sal_Int32 i = 0; i < utf8.getLength(); ++i) {
+        char c = utf8[i];
+        switch (c) {
+        case '\0':
+            rArguments.append("\\0");
+            break;
+        case ',':
+            rArguments.append("\\,");
+            break;
+        case '\\':
+            rArguments.append("\\\\");
+            break;
+        default:
+            rArguments.append(c);
+            break;
+        }
+    }
+    return true;
+}
+
+}
+
+rtl::Reference< RequestHandler > RequestHandler::pGlobal;
+
+// Turns a string in aMsg such as file:///home/foo/.libreoffice/3
+// Into a hex string of well known length ff132a86...
+static OUString CreateMD5FromString( const OUString& aMsg )
+{
+    SAL_INFO("desktop.app", "create md5 from '" << aMsg << "'");
+
+    rtlDigest handle = rtl_digest_create( rtl_Digest_AlgorithmMD5 );
+    if ( handle )
+    {
+        const sal_uInt8* pData = reinterpret_cast<const sal_uInt8*>(aMsg.getStr());
+        sal_uInt32       nSize = aMsg.getLength() * sizeof( sal_Unicode );
+        sal_uInt32       nMD5KeyLen = rtl_digest_queryLength( handle );
+        std::unique_ptr<sal_uInt8[]> pMD5KeyBuffer(new sal_uInt8[ nMD5KeyLen ]);
+
+        rtl_digest_init( handle, pData, nSize );
+        rtl_digest_update( handle, pData, nSize );
+        rtl_digest_get( handle, pMD5KeyBuffer.get(), nMD5KeyLen );
+        rtl_digest_destroy( handle );
+
+        // Create hex-value string from the MD5 value to keep the string size minimal
+        OUStringBuffer aBuffer( nMD5KeyLen * 2 + 1 );
+        for ( sal_uInt32 i = 0; i < nMD5KeyLen; i++ )
+            aBuffer.append( static_cast<sal_Int32>(pMD5KeyBuffer[i]), 16 );
+
+        return aBuffer.makeStringAndClear();
+    }
+
+    return OUString();
+}
+
+namespace {
+
+class ProcessEventsClass_Impl
+{
+public:
+    DECL_STATIC_LINK( ProcessEventsClass_Impl, CallEvent, void*, void );
+    DECL_STATIC_LINK( ProcessEventsClass_Impl, ProcessDocumentsEvent, void*, void );
+};
+
+}
+
+IMPL_STATIC_LINK( ProcessEventsClass_Impl, CallEvent, void*, pEvent, void )
+{
+    // Application events are processed by the Desktop::HandleAppEvent implementation.
+    Desktop::HandleAppEvent( *static_cast<ApplicationEvent*>(pEvent) );
+    delete static_cast<ApplicationEvent*>(pEvent);
+}
+
+IMPL_STATIC_LINK( ProcessEventsClass_Impl, ProcessDocumentsEvent, void*, pEvent, void )
+{
+    // Documents requests are processed by the RequestHandler implementation
+    ProcessDocumentsRequest* pDocsRequest = static_cast<ProcessDocumentsRequest*>(pEvent);
+    RequestHandler::ExecuteCmdLineRequests(*pDocsRequest, false);
+    delete pDocsRequest;
+}
+
+static void ImplPostForeignAppEvent( ApplicationEvent* pEvent )
+{
+    Application::PostUserEvent( LINK( nullptr, ProcessEventsClass_Impl, CallEvent ), pEvent );
+}
+
+static void ImplPostProcessDocumentsEvent( std::unique_ptr<ProcessDocumentsRequest> pEvent )
+{
+    Application::PostUserEvent( LINK( nullptr, ProcessEventsClass_Impl, ProcessDocumentsEvent ), pEvent.release() );
+}
+
+oslSignalAction SalMainPipeExchangeSignal_impl(SAL_UNUSED_PARAMETER void* /*pData*/, oslSignalInfo* pInfo)
+{
+    if( pInfo->Signal == osl_Signal_Terminate )
+        RequestHandler::SetDowning();
+    return osl_Signal_ActCallNextHdl;
+}
+
+
+// The RequestHandlerController implementation is a bookkeeper for all pending requests
+// that were created by the RequestHandler. The requests are waiting to be processed by
+// our framework loadComponentFromURL function (e.g. open/print request).
+// During shutdown the framework is asking RequestHandlerController about pending requests.
+// If there are pending requests framework has to stop the shutdown process. It is waiting
+// for these requests because framework is not able to handle shutdown and open a document
+// concurrently.
+
+
+// XServiceInfo
+OUString SAL_CALL RequestHandlerController::getImplementationName()
+{
+    return "com.sun.star.comp.RequestHandlerController";
+}
+
+sal_Bool RequestHandlerController::supportsService(
+    OUString const & ServiceName)
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+Sequence< OUString > SAL_CALL RequestHandlerController::getSupportedServiceNames()
+{
+    return { };
+}
+
+// XEventListener
+void SAL_CALL RequestHandlerController::disposing( const EventObject& )
+{
+}
+
+// XTerminateListener
+void SAL_CALL RequestHandlerController::queryTermination( const EventObject& )
+{
+    // Desktop ask about pending request through our office ipc pipe. We have to
+    // be sure that no pending request is waiting because framework is not able to
+    // handle shutdown and open a document concurrently.
+
+    if ( RequestHandler::AreRequestsPending() )
+        throw TerminationVetoException();
+    RequestHandler::SetDowning();
+}
+
+void SAL_CALL RequestHandlerController::notifyTermination( const EventObject& )
+{
+}
+
+class IpcThread: public salhelper::Thread {
+public:
+    void start(RequestHandler * handler) {
+        m_handler = handler;
+        launch();
+    }
+
+    virtual void close() = 0;
+
+protected:
+    explicit IpcThread(char const * name): Thread(name), m_handler(nullptr) {}
+
+    virtual ~IpcThread() override {}
+
+    bool process(OString const & arguments, bool * waitProcessed);
+
+    RequestHandler * m_handler;
+};
+
+class PipeIpcThread: public IpcThread {
+public:
+    static RequestHandler::Status enable(rtl::Reference<IpcThread> * thread);
+
+private:
+    explicit PipeIpcThread(osl::Pipe pipe):
+        IpcThread("PipeIPC"), pipe_(std::move(pipe))
+    {}
+
+    virtual ~PipeIpcThread() override {}
+
+    void execute() override;
+
+    void close() override { pipe_.close(); }
+
+    osl::Pipe pipe_;
+};
+
+#if ENABLE_DBUS
+
+namespace {
+
+struct DbusConnectionHolder {
+    explicit DbusConnectionHolder(DBusConnection * theConnection):
+        connection(theConnection)
+    {}
+
+    DbusConnectionHolder(DbusConnectionHolder && other): connection(nullptr)
+    { std::swap(connection, other.connection); }
+
+    ~DbusConnectionHolder() {
+        if (connection != nullptr) {
+            dbus_connection_close(connection);
+            dbus_connection_unref(connection);
+        }
+    }
+
+    DBusConnection * connection;
+};
+
+struct DbusMessageHolder {
+    explicit DbusMessageHolder(DBusMessage * theMessage): message(theMessage) {}
+
+    ~DbusMessageHolder() { clear(); }
+
+    void clear() {
+        if (message != nullptr) {
+            dbus_message_unref(message);
+        }
+        message = nullptr;
+    }
+
+    DBusMessage * message;
+
+private:
+    DbusMessageHolder(DbusMessageHolder const &) = delete;
+    DbusMessageHolder& operator =(DbusMessageHolder const &) = delete;
+};
+
+}
+
+class DbusIpcThread: public IpcThread {
+public:
+    static RequestHandler::Status enable(rtl::Reference<IpcThread> * thread);
+
+private:
+    explicit DbusIpcThread(DbusConnectionHolder && connection):
+        IpcThread("DbusIPC"), connection_(std::move(connection))
+    {}
+
+    virtual ~DbusIpcThread() override {}
+
+    void execute() override;
+
+    void close() override;
+
+    DbusConnectionHolder connection_;
+};
+
+RequestHandler::Status DbusIpcThread::enable(rtl::Reference<IpcThread> * thread)
+{
+    assert(thread != nullptr);
+    if (!dbus_threads_init_default()) {
+        SAL_WARN("desktop.app", "dbus_threads_init_default failed");
+        return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR;
+    }
+    DBusError e;
+    dbus_error_init(&e);
+    DbusConnectionHolder con(dbus_bus_get_private(DBUS_BUS_SESSION, &e));
+    assert((con.connection == nullptr) == bool(dbus_error_is_set(&e)));
+    if (con.connection == nullptr) {
+        SAL_WARN(
+            "desktop.app",
+            "dbus_bus_get_private failed with: " << e.name << ": "
+                << e.message);
+        dbus_error_free(&e);
+        return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR;
+    }
+    for (;;) {
+        int n = dbus_bus_request_name(
+            con.connection, "org.libreoffice.LibreOfficeIpc0",
+            DBUS_NAME_FLAG_DO_NOT_QUEUE, &e);
+        assert((n == -1) == bool(dbus_error_is_set(&e)));
+        switch (n) {
+        case -1:
+            SAL_WARN(
+                "desktop.app",
+                "dbus_bus_request_name failed with: " << e.name << ": "
+                << e.message);
+            dbus_error_free(&e);
+            return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR;
+        case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
+            *thread = new DbusIpcThread(std::move(con));
+            return RequestHandler::IPC_STATUS_OK;
+        case DBUS_REQUEST_NAME_REPLY_EXISTS:
+            {
+                OStringBuffer buf(ARGUMENT_PREFIX);
+                OUString arg;
+                if (!(utl::Bootstrap::getProcessWorkingDir(arg)
+                      && addArgument(buf, '1', arg)))
+                {
+                    buf.append('0');
+                }
+                sal_uInt32 narg = rtl_getAppCommandArgCount();
+                for (sal_uInt32 i = 0; i != narg; ++i) {
+                    rtl_getAppCommandArg(i, &arg.pData);
+                    if (!addArgument(buf, ',', arg)) {
+                        return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR;
+                    }
+                }
+                char const * argstr = buf.getStr();
+                DbusMessageHolder msg(
+                    dbus_message_new_method_call(
+                        "org.libreoffice.LibreOfficeIpc0",
+                        "/org/libreoffice/LibreOfficeIpc0",
+                        "org.libreoffice.LibreOfficeIpcIfc0", "Execute"));
+                if (msg.message == nullptr) {
+                    SAL_WARN(
+                        "desktop.app", "dbus_message_new_method_call failed");
+                    return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR;
+                }
+                DBusMessageIter it;
+                dbus_message_iter_init_append(msg.message, &it);
+                if (!dbus_message_iter_append_basic(
+                        &it, DBUS_TYPE_STRING, &argstr))
+                {
+                    SAL_WARN(
+                        "desktop.app", "dbus_message_iter_append_basic failed");
+                    return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR;
+                }
+                DbusMessageHolder repl(
+                    dbus_connection_send_with_reply_and_block(
+                        con.connection, msg.message, 0x7FFFFFFF, &e));
+                assert(
+                    (repl.message == nullptr) == bool(dbus_error_is_set(&e)));
+                if (repl.message == nullptr) {
+                    SAL_INFO(
+                        "desktop.app",
+                        "dbus_connection_send_with_reply_and_block failed"
+                            " with: " << e.name << ": " << e.message);
+                    dbus_error_free(&e);
+                    break;
+                }
+                return RequestHandler::IPC_STATUS_2ND_OFFICE;
+            }
+        case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
+        case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
+            SAL_WARN(
+                "desktop.app",
+                "dbus_bus_request_name failed with unexpected " << +n);
+            return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR;
+        default:
+            for (;;) std::abort();
+        }
+    }
+}
+
+void DbusIpcThread::execute()
+{
+    assert(m_handler != nullptr);
+    m_handler->cReady.wait();
+    for (;;) {
+        {
+            osl::MutexGuard g(RequestHandler::GetMutex());
+            if (m_handler->mState == RequestHandler::State::Downing) {
+                break;
+            }
+        }
+        if (!dbus_connection_read_write(connection_.connection, -1)) {
+            break;
+        }
+        for (;;) {
+            DbusMessageHolder msg(
+                dbus_connection_pop_message(connection_.connection));
+            if (msg.message == nullptr) {
+                break;
+            }
+            if (!dbus_message_is_method_call(
+                    msg.message, "org.libreoffice.LibreOfficeIpcIfc0",
+                    "Execute"))
+            {
+                SAL_INFO("desktop.app", "unknown DBus message ignored");
+                continue;
+            }
+            DBusMessageIter it;
+            if (!dbus_message_iter_init(msg.message, &it)) {
+                SAL_WARN(
+                    "desktop.app", "DBus message without argument ignored");
+                continue;
+            }
+            if (dbus_message_iter_get_arg_type(&it) != DBUS_TYPE_STRING) {
+                SAL_WARN(
+                    "desktop.app",
+                    "DBus message with non-string argument ignored");
+                continue;
+            }
+            char const * argstr;
+            dbus_message_iter_get_basic(&it, &argstr);
+            bool waitProcessed = false;
+            {
+                osl::MutexGuard g(RequestHandler::GetMutex());
+                if (!process(argstr, &waitProcessed)) {
+                    continue;
+                }
+            }
+            if (waitProcessed) {
+                m_handler->cProcessed.wait();
+            }
+            DbusMessageHolder repl(dbus_message_new_method_return(msg.message));
+            if (repl.message == nullptr) {
+                SAL_WARN(
+                    "desktop.app", "dbus_message_new_method_return failed");
+                continue;
+            }
+            dbus_uint32_t serial = 0;
+            if (!dbus_connection_send(
+                    connection_.connection, repl.message, &serial)) {
+                SAL_WARN("desktop.app", "dbus_connection_send failed");
+                continue;
+            }
+            dbus_connection_flush(connection_.connection);
+        }
+    }
+}
+
+void DbusIpcThread::close() {
+    assert(connection_.connection != nullptr);
+    // Make dbus_connection_read_write fall out of internal poll call blocking
+    // on POLLIN:
+    int fd;
+    if (!dbus_connection_get_socket(connection_.connection, &fd)) {
+        SAL_WARN("desktop.app", "dbus_connection_get_socket failed");
+        return;
+    }
+    if (shutdown(fd, SHUT_RD) == -1) {
+        auto const e = errno;
+        SAL_WARN("desktop.app", "shutdown failed with errno " << e);
+    }
+}
+
+#endif
+
+::osl::Mutex& RequestHandler::GetMutex()
+{
+    static ::osl::Mutex theRequestHandlerMutex;
+    return theRequestHandlerMutex;
+}
+
+void RequestHandler::SetDowning()
+{
+    // We have the order to block all incoming requests. Framework
+    // wants to shutdown and we have to make sure that no loading/printing
+    // requests are executed anymore.
+    ::osl::MutexGuard   aGuard( GetMutex() );
+
+    if ( pGlobal.is() )
+        pGlobal->mState = State::Downing;
+}
+
+void RequestHandler::EnableRequests()
+{
+    // switch between just queueing the requests and executing them
+    ::osl::MutexGuard   aGuard( GetMutex() );
+
+    if ( pGlobal.is() )
+    {
+        if (pGlobal->mState != State::Downing) {
+            pGlobal->mState = State::RequestsEnabled;
+        }
+        ProcessDocumentsRequest aEmptyReq(std::nullopt);
+        // trigger already queued requests
+        RequestHandler::ExecuteCmdLineRequests(aEmptyReq, true);
+    }
+}
+
+bool RequestHandler::AreRequestsPending()
+{
+    // Give info about pending requests
+    ::osl::MutexGuard   aGuard( GetMutex() );
+    if ( pGlobal.is() )
+        return ( pGlobal->mnPendingRequests > 0 );
+    else
+        return false;
+}
+
+void RequestHandler::RequestsCompleted()
+{
+    // Remove nCount pending requests from our internal counter
+    ::osl::MutexGuard   aGuard( GetMutex() );
+    if ( pGlobal.is() )
+    {
+        if ( pGlobal->mnPendingRequests > 0 )
+            pGlobal->mnPendingRequests --;
+    }
+}
+
+RequestHandler::Status RequestHandler::Enable(bool ipc)
+{
+    ::osl::MutexGuard   aGuard( GetMutex() );
+
+    if( pGlobal.is() )
+        return IPC_STATUS_OK;
+
+#if !HAVE_FEATURE_DESKTOP || HAVE_FEATURE_MACOSX_SANDBOX || defined(EMSCRIPTEN)
+    ipc = false;
+#endif
+
+    if (!ipc) {
+        pGlobal = new RequestHandler;
+        return IPC_STATUS_OK;
+    }
+
+    enum class Kind { Pipe, Dbus };
+    Kind kind;
+#if ENABLE_DBUS
+    kind = std::getenv("LIBO_FLATPAK") != nullptr ? Kind::Dbus : Kind::Pipe;
+#else
+    kind = Kind::Pipe;
+#endif
+    rtl::Reference<IpcThread> thread;
+    Status stat = Status(); // silence bogus potentially-uninitialized warnings
+    switch (kind) {
+    case Kind::Pipe:
+        stat = PipeIpcThread::enable(&thread);
+        break;
+    case Kind::Dbus:
+#if ENABLE_DBUS
+        stat = DbusIpcThread::enable(&thread);
+        break;
+#endif
+    default:
+        assert(false);
+    }
+    assert(thread.is() == (stat == IPC_STATUS_OK));
+    if (stat == IPC_STATUS_OK) {
+        pGlobal = new RequestHandler;
+        pGlobal->mIpcThread = thread;
+        pGlobal->mIpcThread->start(pGlobal.get());
+    }
+    return stat;
+}
+
+RequestHandler::Status PipeIpcThread::enable(rtl::Reference<IpcThread> * thread)
+{
+    assert(thread != nullptr);
+
+    // The name of the named pipe is created with the hashcode of the user installation directory (without /user). We have to retrieve
+    // this information from a unotools implementation.
+    OUString aUserInstallPath;
+    ::utl::Bootstrap::PathStatus aLocateResult = ::utl::Bootstrap::locateUserInstallation( aUserInstallPath );
+    if (aLocateResult != utl::Bootstrap::PATH_EXISTS
+        && aLocateResult != utl::Bootstrap::PATH_VALID)
+    {
+        return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR;
+    }
+
+    // Try to  determine if we are the first office or not! This should prevent multiple
+    // access to the user directory !
+    // First we try to create our pipe if this fails we try to connect. We have to do this
+    // in a loop because the other office can crash or shutdown between createPipe
+    // and connectPipe!!
+    auto aUserInstallPathHashCode = CreateMD5FromString(aUserInstallPath);
+
+    // Check result to create a hash code from the user install path
+    if ( aUserInstallPathHashCode.isEmpty() )
+        return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR; // Something completely broken, we cannot create a valid hash code!
+
+    osl::Pipe pipe;
+    enum PipeMode
+    {
+        PIPEMODE_DONTKNOW,
+        PIPEMODE_CREATED,
+        PIPEMODE_CONNECTED
+    };
+    PipeMode nPipeMode = PIPEMODE_DONTKNOW;
+
+    OUString aPipeIdent( "SingleOfficeIPC_" + aUserInstallPathHashCode );
+    do
+    {
+        osl::Security security;
+
+        // Try to create pipe
+        if ( pipe.create( aPipeIdent, osl_Pipe_CREATE, security ))
+        {
+            // Pipe created
+            nPipeMode = PIPEMODE_CREATED;
+        }
+        else if( pipe.create( aPipeIdent, osl_Pipe_OPEN, security )) // Creation not successful, now we try to connect
+        {
+            osl::StreamPipe aStreamPipe(pipe.getHandle());
+            if (readStringFromPipe(aStreamPipe) == SEND_ARGUMENTS)
+            {
+                // Pipe connected to first office
+                nPipeMode = PIPEMODE_CONNECTED;
+            }
+            else
+            {
+                // Pipe connection failed (other office exited or crashed)
+                TimeValue tval;
+                tval.Seconds = 0;
+                tval.Nanosec = 500000000;
+                salhelper::Thread::wait( tval );
+            }
+        }
+        else
+        {
+            oslPipeError eReason = pipe.getError();
+            if ((eReason == osl_Pipe_E_ConnectionRefused) || (eReason == osl_Pipe_E_invalidError))
+                return RequestHandler::IPC_STATUS_PIPE_ERROR;
+
+            // Wait for second office to be ready
+            TimeValue aTimeValue;
+            aTimeValue.Seconds = 0;
+            aTimeValue.Nanosec = 10000000; // 10ms
+            salhelper::Thread::wait( aTimeValue );
+        }
+
+    } while ( nPipeMode == PIPEMODE_DONTKNOW );
+
+    if ( nPipeMode == PIPEMODE_CREATED )
+    {
+        // Seems we are the one and only, so create listening thread
+        *thread = new PipeIpcThread(pipe);
+        return RequestHandler::IPC_STATUS_OK;
+    }
+    else
+    {
+        // Seems another office is running. Pipe arguments to it and self terminate
+        osl::StreamPipe aStreamPipe(pipe.getHandle());
+
+        OStringBuffer aArguments(ARGUMENT_PREFIX);
+        OUString cwdUrl;
+        if (!(utl::Bootstrap::getProcessWorkingDir(cwdUrl) &&
+              addArgument(aArguments, '1', cwdUrl)))
+        {
+            aArguments.append('0');
+        }
+        sal_uInt32 nCount = rtl_getAppCommandArgCount();
+        for( sal_uInt32 i=0; i < nCount; i++ )
+        {
+            rtl_getAppCommandArg( i, &aUserInstallPath.pData );
+            if (!addArgument(aArguments, ',', aUserInstallPath)) {
+                return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR;
+            }
+        }
+        aArguments.append('\0');
+        // finally, write the string onto the pipe
+        SAL_INFO("desktop.app", "writing <" << aArguments.getStr() << ">");
+        sal_Int32 n = aStreamPipe.write(
+            aArguments.getStr(), aArguments.getLength());
+        if (n != aArguments.getLength()) {
+            SAL_INFO("desktop.app", "short write: " << n);
+            return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR;
+        }
+
+        if (readStringFromPipe(aStreamPipe) != PROCESSING_DONE)
+        {
+            // something went wrong
+            return RequestHandler::IPC_STATUS_BOOTSTRAP_ERROR;
+        }
+
+        return RequestHandler::IPC_STATUS_2ND_OFFICE;
+    }
+}
+
+void RequestHandler::Disable()
+{
+    osl::ClearableMutexGuard aMutex( GetMutex() );
+
+    if( !pGlobal.is() )
+        return;
+
+    rtl::Reference< RequestHandler > handler(pGlobal);
+    pGlobal.clear();
+
+    handler->mState = State::Downing;
+    if (handler->mIpcThread.is()) {
+        handler->mIpcThread->close();
+    }
+
+    // release mutex to avoid deadlocks
+    aMutex.clear();
+
+    handler->cReady.set();
+
+    // exit gracefully and join
+    if (handler->mIpcThread.is())
+    {
+        handler->mIpcThread->join();
+        handler->mIpcThread.clear();
+    }
+
+    handler->cReady.reset();
+}
+
+RequestHandler::RequestHandler() :
+    mState( State::Starting ),
+    mnPendingRequests( 0 )
+{
+}
+
+RequestHandler::~RequestHandler()
+{
+    assert(!mIpcThread.is());
+}
+
+void RequestHandler::SetReady(bool bIsReady)
+{
+    osl::MutexGuard g(GetMutex());
+    if (pGlobal.is())
+    {
+        if (bIsReady)
+            pGlobal->cReady.set();
+        else
+            pGlobal->cReady.reset();
+    }
+}
+
+void RequestHandler::WaitForReady()
+{
+    rtl::Reference<RequestHandler> t;
+    {
+        osl::MutexGuard g(GetMutex());
+        t =  pGlobal;
+    }
+    if (t.is())
+    {
+        t->cReady.wait();
+    }
+}
+
+bool IpcThread::process(OString const & arguments, bool * waitProcessed) {
+    assert(waitProcessed != nullptr);
+
+    std::unique_ptr< CommandLineArgs > aCmdLineArgs;
+    try
+    {
+        Parser p(arguments);
+        aCmdLineArgs.reset( new CommandLineArgs( p ) );
+    }
+    catch ( const CommandLineArgs::Supplier::Exception & )
+    {
+        SAL_WARN("desktop.app", "Error in received command line arguments");
+        return false;
+    }
+
+    bool bDocRequestSent = false;
+
+    OUString aUnknown( aCmdLineArgs->GetUnknown() );
+    if (aUnknown.isEmpty() && !aCmdLineArgs->IsHelp() && !aCmdLineArgs->IsVersion())
+    {
+        const CommandLineArgs &rCurrentCmdLineArgs = Desktop::GetCommandLineArgs();
+
+        if ( aCmdLineArgs->IsQuickstart() )
+        {
+            // we have to use application event, because we have to start quickstart service in main thread!!
+            ApplicationEvent* pAppEvent =
+                new ApplicationEvent(ApplicationEvent::Type::QuickStart);
+            ImplPostForeignAppEvent( pAppEvent );
+        }
+
+        // handle request for acceptor
+        std::vector< OUString > const & accept = aCmdLineArgs->GetAccept();
+        for (auto const& elem : accept)
+        {
+            ApplicationEvent* pAppEvent = new ApplicationEvent(
+                ApplicationEvent::Type::Accept, elem);
+            ImplPostForeignAppEvent( pAppEvent );
+        }
+        // handle acceptor removal
+        std::vector< OUString > const & unaccept = aCmdLineArgs->GetUnaccept();
+        for (auto const& elem : unaccept)
+        {
+            ApplicationEvent* pAppEvent = new ApplicationEvent(
+                ApplicationEvent::Type::Unaccept, elem);
+            ImplPostForeignAppEvent( pAppEvent );
+        }
+
+        std::unique_ptr<ProcessDocumentsRequest> pRequest(new ProcessDocumentsRequest(
+            aCmdLineArgs->getCwdUrl()));
+        m_handler->cProcessed.reset();
+        pRequest->pcProcessed = &m_handler->cProcessed;
+        m_handler->mbSuccess = false;
+        pRequest->mpbSuccess = &m_handler->mbSuccess;
+
+        // Print requests are not dependent on the --invisible cmdline argument as they are
+        // loaded with the "hidden" flag! So they are always checked.
+        pRequest->aPrintList = aCmdLineArgs->GetPrintList();
+        bDocRequestSent |= !pRequest->aPrintList.empty();
+        pRequest->aPrintToList = aCmdLineArgs->GetPrintToList();
+        pRequest->aPrinterName = aCmdLineArgs->GetPrinterName();
+        bDocRequestSent |= !( pRequest->aPrintToList.empty() || pRequest->aPrinterName.isEmpty() );
+        pRequest->aConversionList = aCmdLineArgs->GetConversionList();
+        pRequest->aConversionParams = aCmdLineArgs->GetConversionParams();
+        pRequest->aConversionOut = aCmdLineArgs->GetConversionOut();
+        pRequest->aImageConversionType = aCmdLineArgs->GetImageConversionType();
+        pRequest->aInFilter = aCmdLineArgs->GetInFilter();
+        pRequest->bTextCat = aCmdLineArgs->IsTextCat();
+        pRequest->bScriptCat = aCmdLineArgs->IsScriptCat();
+        bDocRequestSent |= !pRequest->aConversionList.empty();
+
+        if ( !rCurrentCmdLineArgs.IsInvisible() )
+        {
+            // Read cmdline args that can open/create documents. As they would open a window
+            // they are only allowed if the "--invisible" is currently not used!
+            pRequest->aOpenList = aCmdLineArgs->GetOpenList();
+            bDocRequestSent |= !pRequest->aOpenList.empty();
+            pRequest->aViewList = aCmdLineArgs->GetViewList();
+            bDocRequestSent |= !pRequest->aViewList.empty();
+            pRequest->aStartList = aCmdLineArgs->GetStartList();
+            bDocRequestSent |= !pRequest->aStartList.empty();
+            pRequest->aForceOpenList = aCmdLineArgs->GetForceOpenList();
+            bDocRequestSent |= !pRequest->aForceOpenList.empty();
+            pRequest->aForceNewList = aCmdLineArgs->GetForceNewList();
+            bDocRequestSent |= !pRequest->aForceNewList.empty();
+
+            // Special command line args to create an empty document for a given module
+
+            // #i18338# (lo)
+            // we only do this if no document was specified on the command line,
+            // since this would be inconsistent with the behaviour of
+            // the first process, see OpenClients() (call to OpenDefault()) in app.cxx
+            if ( aCmdLineArgs->HasModuleParam() && !bDocRequestSent )
+            {
+                SvtModuleOptions aOpt;
+                SvtModuleOptions::EFactory eFactory = SvtModuleOptions::EFactory::WRITER;
+                if ( aCmdLineArgs->IsWriter() )
+                    eFactory = SvtModuleOptions::EFactory::WRITER;
+                else if ( aCmdLineArgs->IsCalc() )
+                    eFactory = SvtModuleOptions::EFactory::CALC;
+                else if ( aCmdLineArgs->IsDraw() )
+                    eFactory = SvtModuleOptions::EFactory::DRAW;
+                else if ( aCmdLineArgs->IsImpress() )
+                    eFactory = SvtModuleOptions::EFactory::IMPRESS;
+                else if ( aCmdLineArgs->IsBase() )
+                    eFactory = SvtModuleOptions::EFactory::DATABASE;
+                else if ( aCmdLineArgs->IsMath() )
+                    eFactory = SvtModuleOptions::EFactory::MATH;
+                else if ( aCmdLineArgs->IsGlobal() )
+                    eFactory = SvtModuleOptions::EFactory::WRITERGLOBAL;
+                else if ( aCmdLineArgs->IsWeb() )
+                    eFactory = SvtModuleOptions::EFactory::WRITERWEB;
+
+                if ( !pRequest->aOpenList.empty() )
+                    pRequest->aModule = aOpt.GetFactoryName( eFactory );
+                else
+                    pRequest->aOpenList.push_back( aOpt.GetFactoryEmptyDocumentURL( eFactory ) );
+                bDocRequestSent = true;
+            }
+        }
+
+        if ( !aCmdLineArgs->IsQuickstart() ) {
+            bool bShowHelp = false;
+            OUStringBuffer aHelpURLBuffer;
+            if (aCmdLineArgs->IsHelpWriter()) {
+                bShowHelp = true;
+                aHelpURLBuffer.append("vnd.sun.star.help://swriter/start");
+            } else if (aCmdLineArgs->IsHelpCalc()) {
+                bShowHelp = true;
+                aHelpURLBuffer.append("vnd.sun.star.help://scalc/start");
+            } else if (aCmdLineArgs->IsHelpDraw()) {
+                bShowHelp = true;
+                aHelpURLBuffer.append("vnd.sun.star.help://sdraw/start");
+            } else if (aCmdLineArgs->IsHelpImpress()) {
+                bShowHelp = true;
+                aHelpURLBuffer.append("vnd.sun.star.help://simpress/start");
+            } else if (aCmdLineArgs->IsHelpBase()) {
+                bShowHelp = true;
+                aHelpURLBuffer.append("vnd.sun.star.help://sdatabase/start");
+            } else if (aCmdLineArgs->IsHelpBasic()) {
+                bShowHelp = true;
+                aHelpURLBuffer.append("vnd.sun.star.help://sbasic/start");
+            } else if (aCmdLineArgs->IsHelpMath()) {
+                bShowHelp = true;
+                aHelpURLBuffer.append("vnd.sun.star.help://smath/start");
+            }
+            if (bShowHelp) {
+                aHelpURLBuffer.append("?Language=");
+                aHelpURLBuffer.append(utl::ConfigManager::getUILocale());
+#if defined UNX
+                aHelpURLBuffer.append("&System=UNX");
+#elif defined _WIN32
+                aHelpURLBuffer.append("&System=WIN");
+#endif
+                ApplicationEvent* pAppEvent = new ApplicationEvent(
+                    ApplicationEvent::Type::OpenHelpUrl,
+                    aHelpURLBuffer.makeStringAndClear());
+                ImplPostForeignAppEvent( pAppEvent );
+            }
+        }
+
+        if ( bDocRequestSent )
+        {
+            // Send requests to dispatch watcher if we have at least one. The receiver
+            // is responsible to delete the request after processing it.
+            if ( aCmdLineArgs->HasModuleParam() )
+            {
+                SvtModuleOptions    aOpt;
+
+                // Support command line parameters to start a module (as preselection)
+                if ( aCmdLineArgs->IsWriter() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::WRITER ) )
+                    pRequest->aModule = aOpt.GetFactoryName( SvtModuleOptions::EFactory::WRITER );
+                else if ( aCmdLineArgs->IsCalc() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::CALC ) )
+                    pRequest->aModule = aOpt.GetFactoryName( SvtModuleOptions::EFactory::CALC );
+                else if ( aCmdLineArgs->IsImpress() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::IMPRESS ) )
+                    pRequest->aModule= aOpt.GetFactoryName( SvtModuleOptions::EFactory::IMPRESS );
+                else if ( aCmdLineArgs->IsDraw() && aOpt.IsModuleInstalled( SvtModuleOptions::EModule::DRAW ) )
+                    pRequest->aModule= aOpt.GetFactoryName( SvtModuleOptions::EFactory::DRAW );
+            }
+
+            ImplPostProcessDocumentsEvent( std::move(pRequest) );
+        }
+        else
+        {
+            // delete not used request again
+            pRequest.reset();
+        }
+        if (aCmdLineArgs->IsEmpty())
+        {
+            // no document was sent, just bring Office to front
+            ApplicationEvent* pAppEvent =
+                new ApplicationEvent(ApplicationEvent::Type::Appear);
+            ImplPostForeignAppEvent( pAppEvent );
+        }
+    }
+    *waitProcessed = bDocRequestSent;
+    return true;
+}
+
+void PipeIpcThread::execute()
+{
+    assert(m_handler != nullptr);
+    do
+    {
+        osl::StreamPipe aStreamPipe;
+        oslPipeError nError = pipe_.accept( aStreamPipe );
+
+
+        if( nError == osl_Pipe_E_None )
+        {
+            // if we receive a request while the office is displaying some dialog or error during
+            // bootstrap, that dialogs event loop might get events that are dispatched by this thread
+            // we have to wait for cReady to be set by the real main loop.
+            // only requests that don't dispatch events may be processed before cReady is set.
+            m_handler->cReady.wait();
+
+            // we might have decided to shutdown while we were sleeping
+            if (!RequestHandler::pGlobal.is()) return;
+
+            // only lock the mutex when processing starts, otherwise we deadlock when the office goes
+            // down during wait
+            osl::ClearableMutexGuard aGuard( RequestHandler::GetMutex() );
+
+            if (m_handler->mState == RequestHandler::State::Downing)
+            {
+                break;
+            }
+
+            // notify client we're ready to process its args:
+            SAL_INFO("desktop.app", "writing <" << SEND_ARGUMENTS << ">");
+            sal_Int32 n = aStreamPipe.write(
+                SEND_ARGUMENTS, SAL_N_ELEMENTS(SEND_ARGUMENTS));
+                // incl. terminating NUL
+            if (n != SAL_N_ELEMENTS(SEND_ARGUMENTS)) {
+                SAL_WARN("desktop.app", "short write: " << n);
+                continue;
+            }
+
+            OString aArguments = readStringFromPipe(aStreamPipe);
+
+            // Is this a lookup message from another application? if so, ignore
+            if (aArguments.isEmpty())
+                continue;
+
+            bool waitProcessed = false;
+            if (!process(aArguments, &waitProcessed)) {
+                continue;
+            }
+
+            // we don't need the mutex any longer...
+            aGuard.clear();
+            bool bSuccess = true;
+            // wait for processing to finish
+            if (waitProcessed)
+            {
+                m_handler->cProcessed.wait();
+                bSuccess = m_handler->mbSuccess;
+            }
+            if (bSuccess)
+            {
+                // processing finished, inform the requesting end:
+                SAL_INFO("desktop.app", "writing <" << PROCESSING_DONE << ">");
+                n = aStreamPipe.write(PROCESSING_DONE, SAL_N_ELEMENTS(PROCESSING_DONE));
+                // incl. terminating NUL
+                if (n != SAL_N_ELEMENTS(PROCESSING_DONE))
+                {
+                    SAL_WARN("desktop.app", "short write: " << n);
+                    continue;
+                }
+            }
+        }
+        else
+        {
+            {
+                osl::MutexGuard aGuard( RequestHandler::GetMutex() );
+                if (m_handler->mState == RequestHandler::State::Downing)
+                {
+                    break;
+                }
+            }
+
+            SAL_WARN( "desktop.app", "Error on accept: " << static_cast<int>(nError));
+            TimeValue tval;
+            tval.Seconds = 1;
+            tval.Nanosec = 0;
+            salhelper::Thread::wait( tval );
+        }
+    } while( schedule() );
+}
+
+static void AddToDispatchList(
+    std::vector<DispatchWatcher::DispatchRequest>& rDispatchList,
+    std::optional< OUString > const & cwdUrl,
+    std::vector< OUString > const & aRequestList,
+    DispatchWatcher::RequestType nType,
+    const OUString& aParam,
+    const OUString& aFactory )
+{
+    for (auto const& request : aRequestList)
+    {
+        rDispatchList.push_back({nType, request, cwdUrl, aParam, aFactory});
+    }
+}
+
+static void AddConversionsToDispatchList(
+    std::vector<DispatchWatcher::DispatchRequest>& rDispatchList,
+    std::optional< OUString > const & cwdUrl,
+    std::vector< OUString > const & rRequestList,
+    const OUString& rParam,
+    const OUString& rPrinterName,
+    const OUString& rFactory,
+    const OUString& rParamOut,
+    std::u16string_view rImgOut,
+    const bool isTextCat,
+    const bool isScriptCat )
+{
+    DispatchWatcher::RequestType nType;
+    OUString aParam( rParam );
+
+    if( !rParam.isEmpty() )
+    {
+        if ( isTextCat )
+            nType = DispatchWatcher::REQUEST_CAT;
+        else
+            nType = DispatchWatcher::REQUEST_CONVERSION;
+        aParam = rParam;
+    }
+    else
+    {
+        if ( isScriptCat )
+            nType = DispatchWatcher::REQUEST_SCRIPT_CAT;
+        else
+        {
+            nType = DispatchWatcher::REQUEST_BATCHPRINT;
+            aParam = rPrinterName;
+        }
+    }
+
+    OUString aOutDir( rParamOut.trim() );
+    std::u16string_view aImgOut = o3tl::trim(rImgOut);
+    OUString aPWD;
+    if (cwdUrl)
+    {
+        aPWD = *cwdUrl;
+    }
+    else
+    {
+        utl::Bootstrap::getProcessWorkingDir( aPWD );
+    }
+
+    if( !::osl::FileBase::getAbsoluteFileURL( aPWD, rParamOut, aOutDir ) )
+        ::osl::FileBase::getSystemPathFromFileURL( aOutDir, aOutDir );
+
+    if( !rParamOut.trim().isEmpty() )
+    {
+        aParam += ";" + aOutDir;
+    }
+    else
+    {
+        ::osl::FileBase::getSystemPathFromFileURL( aPWD, aPWD );
+        aParam += ";" + aPWD;
+    }
+
+    if( !rImgOut.empty() )
+        aParam += OUString::Concat("|") + aImgOut;
+
+    for (auto const& request : rRequestList)
+    {
+        rDispatchList.push_back({nType, request, cwdUrl, aParam, rFactory});
+    }
+}
+
+namespace {
+
+struct ConditionSetGuard
+{
+    osl::Condition* m_pCondition;
+    ConditionSetGuard(osl::Condition* pCondition) : m_pCondition(pCondition) {}
+    ~ConditionSetGuard() { if (m_pCondition) m_pCondition->set(); }
+};
+
+}
+
+bool RequestHandler::ExecuteCmdLineRequests(
+    ProcessDocumentsRequest& aRequest, bool noTerminate)
+{
+    // protect the dispatch list
+    osl::ClearableMutexGuard aGuard( GetMutex() );
+
+    // ensure that Processed flag (if exists) is signaled in any outcome
+    ConditionSetGuard aSetGuard(aRequest.pcProcessed);
+
+    static std::vector<DispatchWatcher::DispatchRequest> aDispatchList;
+
+    // Create dispatch list for dispatch watcher
+    AddToDispatchList( aDispatchList, aRequest.aCwdUrl, aRequest.aInFilter, DispatchWatcher::REQUEST_INFILTER, "", aRequest.aModule );
+    AddToDispatchList( aDispatchList, aRequest.aCwdUrl, aRequest.aOpenList, DispatchWatcher::REQUEST_OPEN, "", aRequest.aModule );
+    AddToDispatchList( aDispatchList, aRequest.aCwdUrl, aRequest.aViewList, DispatchWatcher::REQUEST_VIEW, "", aRequest.aModule );
+    AddToDispatchList( aDispatchList, aRequest.aCwdUrl, aRequest.aStartList, DispatchWatcher::REQUEST_START, "", aRequest.aModule );
+    AddToDispatchList( aDispatchList, aRequest.aCwdUrl, aRequest.aPrintList, DispatchWatcher::REQUEST_PRINT, "", aRequest.aModule );
+    AddToDispatchList( aDispatchList, aRequest.aCwdUrl, aRequest.aPrintToList, DispatchWatcher::REQUEST_PRINTTO, aRequest.aPrinterName, aRequest.aModule );
+    AddToDispatchList( aDispatchList, aRequest.aCwdUrl, aRequest.aForceOpenList, DispatchWatcher::REQUEST_FORCEOPEN, "", aRequest.aModule );
+    AddToDispatchList( aDispatchList, aRequest.aCwdUrl, aRequest.aForceNewList, DispatchWatcher::REQUEST_FORCENEW, "", aRequest.aModule );
+    AddConversionsToDispatchList( aDispatchList, aRequest.aCwdUrl, aRequest.aConversionList, aRequest.aConversionParams, aRequest.aPrinterName, aRequest.aModule, aRequest.aConversionOut, aRequest.aImageConversionType, aRequest.bTextCat, aRequest.bScriptCat );
+    bool bShutdown( false );
+
+    if ( pGlobal.is() )
+    {
+        if( ! pGlobal->AreRequestsEnabled() )
+        {
+            // Either starting, or downing - do not process the request, just try to bring Office to front
+            ApplicationEvent* pAppEvent =
+                new ApplicationEvent(ApplicationEvent::Type::Appear);
+            ImplPostForeignAppEvent(pAppEvent);
+            return bShutdown;
+        }
+
+        pGlobal->mnPendingRequests += aDispatchList.size();
+        if ( !pGlobal->mpDispatchWatcher.is() )
+        {
+            pGlobal->mpDispatchWatcher = new DispatchWatcher;
+        }
+        rtl::Reference<DispatchWatcher> dispatchWatcher(
+            pGlobal->mpDispatchWatcher);
+
+        // copy for execute
+        std::vector<DispatchWatcher::DispatchRequest> aTempList;
+        aTempList.swap( aDispatchList );
+
+        aGuard.clear();
+
+        // Execute dispatch requests
+        bShutdown = dispatchWatcher->executeDispatchRequests( aTempList, noTerminate);
+        if (aRequest.mpbSuccess)
+            *aRequest.mpbSuccess = true; // signal that we have actually succeeded
+    }
+
+    return bShutdown;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/officeipcthread.hxx b/desktop/source/app/officeipcthread.hxx
new file mode 100644
index 000000000..a233c18e0
--- /dev/null
+++ b/desktop/source/app/officeipcthread.hxx
@@ -0,0 +1,157 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <utility>
+#include <vector>
+
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/frame/XTerminateListener.hpp>
+#include <osl/signal.h>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <salhelper/simplereferenceobject.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <osl/conditn.hxx>
+#include <optional>
+
+namespace desktop
+{
+
+oslSignalAction SalMainPipeExchangeSignal_impl(void* /*pData*/, oslSignalInfo* pInfo);
+
+// A request for the current office
+// that was given by command line or by IPC pipe communication.
+struct ProcessDocumentsRequest
+{
+    explicit ProcessDocumentsRequest(std::optional< OUString > cwdUrl):
+        aCwdUrl(std::move(cwdUrl)), pcProcessed( nullptr ), bTextCat( false ), bScriptCat( false ) {}
+
+    std::optional< OUString > aCwdUrl;
+    OUString aModule;
+    std::vector< OUString > aOpenList; // Documents that should be opened in the default way
+    std::vector< OUString > aViewList; // Documents that should be opened in viewmode
+    std::vector< OUString > aStartList; // Documents/Presentations that should be started
+    std::vector< OUString > aPrintList; // Documents that should be printed on default printer
+    std::vector< OUString > aForceOpenList; // Documents that should be forced to open for editing (even templates)
+    std::vector< OUString > aForceNewList; // Documents that should be forced to create a new document
+    OUString aPrinterName;   // The printer name that should be used for printing
+    std::vector< OUString > aPrintToList; // Documents that should be printed on the given printer
+    std::vector< OUString > aConversionList;
+    OUString aConversionParams;
+    OUString aConversionOut;
+    OUString aImageConversionType;
+    std::vector< OUString > aInFilter;
+    ::osl::Condition *pcProcessed;  // pointer condition to be set when the request has been processed
+    bool* mpbSuccess = nullptr; // pointer to boolean receiving if the processing was successful
+    bool bTextCat; // boolean flag indicating whether to dump text content to console
+    bool bScriptCat; // boolean flag indicating whether to dump script content to console
+};
+
+class DispatchWatcher;
+class IpcThread;
+class PipeIpcThread;
+class DbusIpcThread;
+
+class RequestHandler: public salhelper::SimpleReferenceObject
+{
+    friend IpcThread;
+    friend PipeIpcThread;
+    friend DbusIpcThread;
+
+  private:
+    static rtl::Reference< RequestHandler > pGlobal;
+
+    enum class State { Starting, RequestsEnabled, Downing };
+
+    State                       mState;
+    int                         mnPendingRequests;
+    rtl::Reference<DispatchWatcher> mpDispatchWatcher;
+    rtl::Reference<IpcThread> mIpcThread;
+
+    /* condition to be set when the request has been processed */
+    ::osl::Condition cProcessed;
+    /* receives if the processing was successful (may be false e.g. when shutting down) */
+    bool mbSuccess = false;
+
+    /* condition to be set when the main event loop is ready
+       otherwise an error dialogs event loop could eat away
+       requests from a 2nd office */
+    ::osl::Condition cReady;
+
+    static ::osl::Mutex&        GetMutex();
+
+    RequestHandler();
+
+    virtual ~RequestHandler() override;
+
+  public:
+    enum Status
+    {
+        IPC_STATUS_OK,
+        IPC_STATUS_2ND_OFFICE,
+        IPC_STATUS_PIPE_ERROR,
+        IPC_STATUS_BOOTSTRAP_ERROR
+    };
+
+    // controlling pipe communication during shutdown
+    static void                 SetDowning();
+    static void                 EnableRequests();
+    static bool                 AreRequestsPending();
+    static void                 RequestsCompleted();
+    static bool                 ExecuteCmdLineRequests(
+        ProcessDocumentsRequest&, bool noTerminate);
+
+    // return sal_False if second office
+    static Status               Enable(bool ipc);
+    static void                 Disable();
+    // start dispatching events...
+    static void                 SetReady(bool bIsReady);
+    static void                 WaitForReady();
+
+    bool                        AreRequestsEnabled() const { return mState == State::RequestsEnabled; }
+};
+
+
+class RequestHandlerController : public ::cppu::WeakImplHelper<
+                                            css::lang::XServiceInfo,
+                                            css::frame::XTerminateListener >
+{
+    public:
+        RequestHandlerController() {}
+
+        // XServiceInfo
+        virtual OUString SAL_CALL getImplementationName() override;
+        virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+        virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+        // XEventListener
+        virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+        // XTerminateListener
+        virtual void SAL_CALL queryTermination( const css::lang::EventObject& aEvent ) override;
+        virtual void SAL_CALL notifyTermination( const css::lang::EventObject& aEvent ) override;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/opencl.cxx b/desktop/source/app/opencl.cxx
new file mode 100644
index 000000000..fb5c3723e
--- /dev/null
+++ b/desktop/source/app/opencl.cxx
@@ -0,0 +1,257 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+/*
+ * This module exists to validate the OpenCL implementation,
+ * where necessary during startup; and before we load or
+ * calculate using OpenCL.
+ */
+
+#include <app.hxx>
+
+#include <config_version.h>
+#include <config_feature_opencl.h>
+#include <config_folders.h>
+
+#include <rtl/bootstrap.hxx>
+#include <sal/log.hxx>
+
+#include <officecfg/Office/Calc.hxx>
+#include <officecfg/Office/Common.hxx>
+
+#include <comphelper/propertyvalue.hxx>
+#include <svl/documentlockfile.hxx>
+#include <tools/diagnose_ex.h>
+
+#include <com/sun/star/table/XCell2.hpp>
+#include <com/sun/star/sheet/XCalculatable.hpp>
+#include <com/sun/star/sheet/XSpreadsheet.hpp>
+#include <com/sun/star/sheet/XSpreadsheets.hpp>
+#include <com/sun/star/sheet/XSpreadsheetDocument.hpp>
+
+#if HAVE_FEATURE_OPENCL
+#include <opencl/openclwrapper.hxx>
+#endif
+#include <opencl/OpenCLZone.hxx>
+
+#include <osl/file.hxx>
+#include <osl/process.h>
+
+using namespace ::osl;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::frame;
+
+namespace desktop {
+
+#if HAVE_FEATURE_OPENCL
+
+static bool testOpenCLDriver()
+{
+    // A simple OpenCL test run in a separate process in order to test
+    // whether the driver crashes (asserts,etc.) when trying to use OpenCL.
+    SAL_INFO("opencl", "Starting CL driver test");
+
+    OUString testerURL("$BRAND_BASE_DIR/" LIBO_BIN_FOLDER "/opencltest");
+    rtl::Bootstrap::expandMacros(testerURL); //TODO: detect failure
+
+    OUString deviceName, platformName;
+    openclwrapper::getOpenCLDeviceName( deviceName, platformName );
+    rtl_uString* args[] = { deviceName.pData, platformName.pData };
+    sal_Int32 numArgs = 2;
+
+    oslProcess process;
+    oslSecurity security = osl_getCurrentSecurity();
+    oslProcessError error = osl_executeProcess(testerURL.pData, args, numArgs,
+        osl_Process_SEARCHPATH | osl_Process_HIDDEN, security,
+        nullptr, nullptr, 0, &process );
+    osl_freeSecurityHandle( security );
+    if( error != osl_Process_E_None )
+    {
+        SAL_WARN( "opencl", "failed to start CL driver test: " << error );
+        return false;
+    }
+    // If the driver takes more than 10 seconds, it's probably broken/useless.
+    TimeValue timeout( 10, 0 );
+    error = osl_joinProcessWithTimeout( process, &timeout );
+    if( error == osl_Process_E_None )
+    {
+        oslProcessInfo info;
+        info.Size = sizeof( info );
+        error = osl_getProcessInfo( process, osl_Process_EXITCODE, &info );
+        if( error == osl_Process_E_None )
+        {
+            if( info.Code == 0 )
+            {
+                SAL_INFO( "opencl", "CL driver test passed" );
+                osl_freeProcessHandle( process );
+                return true;
+            }
+            else
+            {
+                SAL_WARN( "opencl", "CL driver test failed - disabling: " << info.Code );
+                osl_freeProcessHandle( process );
+                return false;
+            }
+        }
+    }
+    SAL_WARN( "opencl", "CL driver test did not finish - disabling: " << error );
+    osl_terminateProcess( process );
+    osl_freeProcessHandle( process );
+    return false;
+}
+
+static bool testOpenCLCompute(const Reference< XDesktop2 > &xDesktop, const OUString &rURL)
+{
+    bool bSuccess = false;
+    css::uno::Reference< css::lang::XComponent > xComponent;
+
+    sal_uInt64 nKernelFailures = openclwrapper::kernelFailures;
+
+    SAL_INFO("opencl", "Starting CL test spreadsheet");
+
+    // A stale lock file would make the loading fail, so make sure to remove it.
+    try {
+        ::svt::DocumentLockFile lockFile( rURL );
+        lockFile.RemoveFileDirectly();
+    }
+    catch (const css::uno::Exception&)
+    {
+    }
+
+    try {
+        css::uno::Reference< css::frame::XComponentLoader > xLoader(xDesktop, css::uno::UNO_QUERY_THROW);
+
+        css::uno::Sequence< css::beans::PropertyValue > aArgs{ comphelper::makePropertyValue("Hidden",
+                                                                                             true) };
+
+        xComponent.set(xLoader->loadComponentFromURL(rURL, "_blank", 0, aArgs));
+
+        // What an unpleasant API to use.
+        css::uno::Reference< css::sheet::XCalculatable > xCalculatable( xComponent, css::uno::UNO_QUERY_THROW);
+        css::uno::Reference< css::sheet::XSpreadsheetDocument > xSpreadDoc( xComponent, css::uno::UNO_QUERY_THROW );
+        css::uno::Reference< css::sheet::XSpreadsheets > xSheets( xSpreadDoc->getSheets(), css::uno::UNO_SET_THROW );
+        css::uno::Reference< css::container::XIndexAccess > xIndex( xSheets, css::uno::UNO_QUERY_THROW );
+        css::uno::Reference< css::sheet::XSpreadsheet > xSheet( xIndex->getByIndex(0), css::uno::UNO_QUERY_THROW);
+
+        // So we insert our MAX call at the end on a named range.
+        css::uno::Reference< css::table::XCell2 > xThresh( xSheet->getCellByPosition(1,1), css::uno::UNO_QUERY_THROW ); // B2
+        double fThreshold = xThresh->getValue();
+
+        // We need pure OCL formulae all the way through the
+        // dependency chain, or we fall-back.
+        xCalculatable->calculateAll();
+
+        // So we insert our MAX call at the end on a named range.
+        css::uno::Reference< css::table::XCell2 > xCell( xSheet->getCellByPosition(1,0), css::uno::UNO_QUERY_THROW );
+        xCell->setFormula("=MAX(results)");
+        double fResult = xCell->getValue();
+
+        // Ensure the maximum variance is below our tolerance.
+        if (fResult > fThreshold)
+        {
+            SAL_WARN("opencl", "OpenCL results unstable - disabling; result: "
+                     << fResult << " vs. " << fThreshold);
+        }
+        else
+        {
+            SAL_INFO("opencl", "calculating smoothly; result: " << fResult);
+            bSuccess = true;
+        }
+    }
+    catch (const css::uno::Exception &)
+    {
+        TOOLS_WARN_EXCEPTION("opencl", "OpenCL testing failed - disabling");
+    }
+
+    if (nKernelFailures != openclwrapper::kernelFailures)
+    {
+        // tdf#100883 - defeat SEH exception handling fallbacks.
+        SAL_WARN("opencl", "OpenCL kernels failed to compile, "
+                 "or took SEH exceptions "
+                 << nKernelFailures << " != " << openclwrapper::kernelFailures);
+        bSuccess = false;
+    }
+
+    if (!bSuccess)
+        OpenCLZone::hardDisable();
+    if (xComponent.is())
+        xComponent->dispose();
+
+
+    return bSuccess;
+}
+
+void Desktop::CheckOpenCLCompute(const Reference< XDesktop2 > &xDesktop)
+{
+    if (!openclwrapper::canUseOpenCL() || Application::IsSafeModeEnabled())
+        return;
+
+    SAL_INFO("opencl", "Initiating test of OpenCL device");
+    OpenCLZone aZone;
+    OpenCLInitialZone aInitialZone;
+
+    OUString aDevice = officecfg::Office::Calc::Formula::Calculation::OpenCLDevice::get();
+    OUString aSelectedCLDeviceVersionID;
+    if (!openclwrapper::switchOpenCLDevice(
+            &aDevice,
+            officecfg::Office::Calc::Formula::Calculation::OpenCLAutoSelect::get(),
+            false /* bForceEvaluation */,
+            aSelectedCLDeviceVersionID))
+    {
+        SAL_WARN("opencl", "Failed to initialize OpenCL for test");
+        OpenCLZone::hardDisable();
+        return;
+    }
+
+    // Append our app version as well.
+    aSelectedCLDeviceVersionID += "--" LIBO_VERSION_DOTTED;
+
+    // Append timestamp of the file.
+    OUString aURL("$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/opencl/cl-test.ods");
+    rtl::Bootstrap::expandMacros(aURL);
+
+    DirectoryItem aItem;
+    (void)DirectoryItem::get( aURL, aItem );
+    FileStatus aFileStatus( osl_FileStatus_Mask_ModifyTime );
+    (void)aItem.getFileStatus( aFileStatus );
+    TimeValue aTimeVal = aFileStatus.getModifyTime();
+    aSelectedCLDeviceVersionID += "--" +
+        OUString::number(aTimeVal.Seconds);
+
+    if (aSelectedCLDeviceVersionID == officecfg::Office::Common::Misc::SelectedOpenCLDeviceIdentifier::get())
+        return;
+
+    // OpenCL device changed - sanity check it and disable if bad.
+
+    sal_Int32 nOrigMinimumSize = officecfg::Office::Calc::Formula::Calculation::OpenCLMinimumDataSize::get();
+    { // set the minimum group size to something small for quick testing.
+        std::shared_ptr<comphelper::ConfigurationChanges> xBatch(comphelper::ConfigurationChanges::create());
+        officecfg::Office::Calc::Formula::Calculation::OpenCLMinimumDataSize::set(3 /* small */, xBatch);
+        xBatch->commit();
+    }
+
+    // Hopefully at least basic functionality always works and broken OpenCL implementations break
+    // only when they are used to compute something. If this assumptions turns out to be not true,
+    // the driver check needs to be moved sooner.
+    bool bSucceeded = testOpenCLDriver() && testOpenCLCompute(xDesktop, aURL);
+
+    { // restore the minimum group size
+        std::shared_ptr<comphelper::ConfigurationChanges> xBatch(comphelper::ConfigurationChanges::create());
+        officecfg::Office::Calc::Formula::Calculation::OpenCLMinimumDataSize::set(nOrigMinimumSize, xBatch);
+        officecfg::Office::Common::Misc::SelectedOpenCLDeviceIdentifier::set(aSelectedCLDeviceVersionID, xBatch);
+        xBatch->commit();
+    }
+
+    if (!bSucceeded)
+        OpenCLZone::hardDisable();
+}
+#endif // HAVE_FEATURE_OPENCL
+
+} // end namespace desktop
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/desktop/source/app/sofficemain.cxx b/desktop/source/app/sofficemain.cxx
new file mode 100644
index 000000000..0b02155f5
--- /dev/null
+++ b/desktop/source/app/sofficemain.cxx
@@ -0,0 +1,104 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+#include <config_features.h>
+
+#include <desktop/dllapi.h>
+
+#include <app.hxx>
+#include "cmdlineargs.hxx"
+#include "cmdlinehelp.hxx"
+
+// needed before sal/main.h to avoid redefinition of macros
+#include <prewin.h>
+
+#include <rtl/bootstrap.hxx>
+#include <sal/log.hxx>
+#include <sal/main.h>
+#include <tools/extendapplicationenvironment.hxx>
+#include <vcl/svmain.hxx>
+
+#if HAVE_FEATURE_BREAKPAD
+#include <desktop/crashreport.hxx>
+#endif
+
+#include <postwin.h>
+
+#ifdef ANDROID
+#  include <jni.h>
+#  include <android/log.h>
+#  include <salhelper/thread.hxx>
+
+#  define LOGTAG "LibreOffice/sofficemain"
+#  define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO, LOGTAG, __VA_ARGS__))
+#endif
+
+extern "C" int DESKTOP_DLLPUBLIC soffice_main()
+{
+    sal_detail_initialize(sal::detail::InitializeSoffice, nullptr);
+
+#if HAVE_FEATURE_BREAKPAD
+    CrashReporter::installExceptionHandler();
+#endif
+
+#if defined ANDROID
+    try {
+        rtl::Bootstrap::setIniFilename("file:///assets/program/lofficerc");
+#endif
+    tools::extendApplicationEnvironment();
+
+    desktop::Desktop aDesktop;
+    // This string is used during initialization of the Gtk+ VCL module
+    Application::SetAppName( "soffice" );
+
+    // handle --version and --help already here, otherwise they would be handled
+    // after VCL initialization that might fail if $DISPLAY is not set
+    const desktop::CommandLineArgs& rCmdLineArgs = desktop::Desktop::GetCommandLineArgs();
+    const OUString& aUnknown( rCmdLineArgs.GetUnknown() );
+    if ( !aUnknown.isEmpty() )
+    {
+        desktop::Desktop::InitApplicationServiceManager();
+        desktop::displayCmdlineHelp( aUnknown );
+        return EXIT_FAILURE;
+    }
+    if ( rCmdLineArgs.IsHelp() )
+    {
+        desktop::Desktop::InitApplicationServiceManager();
+        desktop::displayCmdlineHelp( OUString() );
+        return EXIT_SUCCESS;
+    }
+    if ( rCmdLineArgs.IsVersion() )
+    {
+        desktop::Desktop::InitApplicationServiceManager();
+        desktop::displayVersion();
+        return EXIT_SUCCESS;
+    }
+
+    return SVMain();
+#if defined ANDROID
+    } catch (const css::uno::Exception &e) {
+        LOGI("Unhandled UNO exception: '%s'",
+             OUStringToOString(e.Message, RTL_TEXTENCODING_UTF8).getStr());
+        throw; // to get exception type printed
+    }
+#endif
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/sofficemain.h b/desktop/source/app/sofficemain.h
new file mode 100644
index 000000000..9bc6dafee
--- /dev/null
+++ b/desktop/source/app/sofficemain.h
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <desktop/dllapi.h>
+
+#if defined __cplusplus
+extern "C" {
+#endif
+
+int DESKTOP_DLLPUBLIC soffice_main(void);
+
+#if defined __cplusplus
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/updater.cxx b/desktop/source/app/updater.cxx
new file mode 100644
index 000000000..b4be0f7bc
--- /dev/null
+++ b/desktop/source/app/updater.cxx
@@ -0,0 +1,894 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include "updater.hxx"
+
+#if UNX
+#include <unistd.h>
+#include <errno.h>
+
+#endif
+
+#ifdef _WIN32
+#include <comphelper/windowsStart.hxx>
+#endif
+
+#include <fstream>
+#include <config_folders.h>
+#include <rtl/bootstrap.hxx>
+
+#include <officecfg/Office/Update.hxx>
+
+#include <rtl/ustring.hxx>
+#include <unotools/tempfile.hxx>
+#include <unotools/configmgr.hxx>
+#include <osl/file.hxx>
+#include <rtl/process.h>
+#include <sal/log.hxx>
+
+#include <curl/curl.h>
+
+#include <orcus/json_document_tree.hpp>
+#include <orcus/config.hpp>
+#include <orcus/pstring.hpp>
+#include <comphelper/hash.hxx>
+
+#include <com/sun/star/container/XNameAccess.hpp>
+
+#include <officecfg/Setup.hxx>
+
+#include <functional>
+#include <memory>
+#include <set>
+
+namespace {
+
+class error_updater : public std::exception
+{
+    OString maStr;
+public:
+
+    error_updater(const OString& rStr):
+        maStr(rStr)
+    {
+    }
+
+    virtual const char* what() const  throw() override
+    {
+        return maStr.getStr();
+    }
+};
+
+#ifdef UNX
+static const char kUserAgent[] = "LibreOffice UpdateChecker/1.0 (Linux)";
+#else
+static const char kUserAgent[] = "LibreOffice UpdateChecker/1.0 (unknown platform)";
+#endif
+
+#ifdef UNX
+const char* const pUpdaterName = "updater";
+const char* const pSofficeExeName = "soffice";
+#elif defined(_WIN32)
+const char* pUpdaterName = "updater.exe";
+const char* pSofficeExeName = "soffice.exe";
+#else
+#error "Need implementation"
+#endif
+
+OUString normalizePath(const OUString& rPath)
+{
+    OUString aPath =  rPath.replaceAll("//", "/");
+
+    // remove final /
+    if (aPath.endsWith("/"))
+    {
+        aPath = aPath.copy(0, aPath.getLength() - 1);
+    }
+
+    while (aPath.indexOf("/..") != -1)
+    {
+        sal_Int32 nIndex = aPath.indexOf("/..");
+        sal_Int32 i = nIndex - 1;
+        for (; i > 0; --i)
+        {
+            if (aPath[i] == '/')
+                break;
+        }
+
+        OUString aTempPath = aPath;
+        aPath = aTempPath.copy(0, i) + aPath.copy(nIndex + 3);
+    }
+
+    return aPath.replaceAll("\\", "/");
+}
+
+void CopyFileToDir(const OUString& rTempDirURL, const OUString & rFileName, const OUString& rOldDir)
+{
+    OUString aSourceURL = rOldDir + "/" + rFileName;
+    OUString aDestURL = rTempDirURL + "/" + rFileName;
+
+    osl::File::RC eError = osl::File::copy(aSourceURL, aDestURL);
+    if (eError != osl::File::E_None)
+    {
+        SAL_WARN("desktop.updater", "could not copy the file to a temp directory: " << rFileName);
+        throw std::exception();
+    }
+}
+
+OUString getPathFromURL(const OUString& rURL)
+{
+    OUString aPath;
+    osl::FileBase::getSystemPathFromFileURL(rURL, aPath);
+
+    return normalizePath(aPath);
+}
+
+void CopyUpdaterToTempDir(const OUString& rInstallDirURL, const OUString& rTempDirURL)
+{
+    OUString aUpdaterName = OUString::fromUtf8(pUpdaterName);
+    CopyFileToDir(rTempDirURL, aUpdaterName, rInstallDirURL);
+}
+
+#ifdef UNX
+typedef char CharT;
+#define tstrncpy std::strncpy
+#elif defined(_WIN32)
+typedef wchar_t CharT;
+#define tstrncpy std::wcsncpy
+#else
+#error "Need an implementation"
+#endif
+
+void createStr(const OUString& rStr, CharT** pArgs, size_t i)
+{
+#ifdef UNX
+    OString aStr = OUStringToOString(rStr, RTL_TEXTENCODING_UTF8);
+#elif defined(_WIN32)
+    OUString aStr = rStr;
+#else
+#error "Need an implementation"
+#endif
+    CharT* pStr = new CharT[aStr.getLength() + 1];
+    tstrncpy(pStr, (CharT*)aStr.getStr(), aStr.getLength());
+    pStr[aStr.getLength()] = '\0';
+    pArgs[i] = pStr;
+}
+
+CharT** createCommandLine()
+{
+    OUString aInstallDir = Updater::getInstallationPath();
+
+    size_t nCommandLineArgs = rtl_getAppCommandArgCount();
+    size_t nArgs = 8 + nCommandLineArgs;
+    CharT** pArgs = new CharT*[nArgs];
+    {
+        OUString aUpdaterName = OUString::fromUtf8(pUpdaterName);
+        createStr(aUpdaterName, pArgs, 0);
+    }
+    {
+        // directory with the patch log
+        OUString aPatchDir = Updater::getPatchDirURL();
+        rtl::Bootstrap::expandMacros(aPatchDir);
+        OUString aTempDirPath = getPathFromURL(aPatchDir);
+        Updater::log("Patch Dir: " + aTempDirPath);
+        createStr(aTempDirPath, pArgs, 1);
+    }
+    {
+        // the actual update directory
+        Updater::log("Install Dir: " + aInstallDir);
+        createStr(aInstallDir, pArgs, 2);
+    }
+    {
+        // the temporary updated build
+        Updater::log("Working Dir: " + aInstallDir);
+        createStr(aInstallDir, pArgs, 3);
+    }
+    {
+#ifdef UNX
+        OUString aPID("0");
+#elif defined(_WIN32)
+        oslProcessInfo aInfo;
+        aInfo.Size = sizeof(oslProcessInfo);
+        osl_getProcessInfo(nullptr, osl_Process_IDENTIFIER, &aInfo);
+        OUString aPID = OUString::number(aInfo.Ident);
+#else
+#error "Need an implementation"
+#endif
+        createStr(aPID, pArgs, 4);
+    }
+    {
+        OUString aExeDir = Updater::getExecutableDirURL();
+        OUString aSofficePath = getPathFromURL(aExeDir);
+        Updater::log("soffice Path: " + aSofficePath);
+        createStr(aSofficePath, pArgs, 5);
+    }
+    {
+        // the executable to start after the successful update
+        OUString aExeDir = Updater::getExecutableDirURL();
+        OUString aSofficePathURL = aExeDir + OUString::fromUtf8(pSofficeExeName);
+        OUString aSofficePath = getPathFromURL(aSofficePathURL);
+        createStr(aSofficePath, pArgs, 6);
+    }
+
+    // add the command line arguments from the soffice list
+    for (size_t i = 0; i < nCommandLineArgs; ++i)
+    {
+        OUString aCommandLineArg;
+        rtl_getAppCommandArg(i, &aCommandLineArg.pData);
+        createStr(aCommandLineArg, pArgs, 7 + i);
+    }
+
+    pArgs[nArgs - 1] = nullptr;
+
+    return pArgs;
+}
+
+struct update_file
+{
+    OUString aURL;
+    OUString aHash;
+    size_t nSize;
+};
+
+struct language_file
+{
+    update_file aUpdateFile;
+    OUString aLangCode;
+};
+
+struct update_info
+{
+    OUString aFromBuildID;
+    OUString aSeeAlsoURL;
+    OUString aMessage;
+
+    update_file aUpdateFile;
+    std::vector<language_file> aLanguageFiles;
+};
+
+bool isUserWritable(const OUString& rFileURL)
+{
+    osl::FileStatus aStatus(osl_FileStatus_Mask_Attributes);
+    osl::DirectoryItem aDirectoryItem;
+
+    osl::FileBase::RC eRes = osl::DirectoryItem::get(rFileURL, aDirectoryItem);
+    if (eRes != osl::FileBase::E_None)
+    {
+        Updater::log("Could not get the directory item for: " + rFileURL);
+        return false;
+    }
+
+    osl::FileBase::RC eResult = aDirectoryItem.getFileStatus(aStatus);
+    if (eResult != osl::FileBase::E_None)
+    {
+        Updater::log("Could not get the file status for: " + rFileURL);
+        return false;
+    }
+
+    bool bReadOnly = (aStatus.getAttributes() & static_cast<sal_uInt64>(osl_File_Attribute_ReadOnly)) != 0;
+    if (bReadOnly)
+    {
+        Updater::log("Update location as determined by: " + rFileURL + " is read-only.");
+        return false;
+    }
+
+    return true;
+}
+
+}
+
+bool update()
+{
+    utl::TempFile aTempDir(nullptr, true);
+    OUString aTempDirURL = aTempDir.GetURL();
+    CopyUpdaterToTempDir(Updater::getExecutableDirURL(), aTempDirURL);
+
+    OUString aUpdaterPath = getPathFromURL(aTempDirURL + "/" + OUString::fromUtf8(pUpdaterName));
+
+    Updater::log("Calling the updater with parameters: ");
+    CharT** pArgs = createCommandLine();
+
+    bool bSuccess = true;
+    const char* pUpdaterTestReplace = std::getenv("LIBO_UPDATER_TEST_REPLACE");
+    if (!pUpdaterTestReplace)
+    {
+#if UNX
+        OString aPath = OUStringToOString(aUpdaterPath, RTL_TEXTENCODING_UTF8);
+        if (execv(aPath.getStr(), pArgs))
+        {
+            printf("execv failed with error %d %s\n",errno,strerror(errno));
+            bSuccess = false;
+        }
+#elif defined(_WIN32)
+        bSuccess = WinLaunchChild((wchar_t*)aUpdaterPath.getStr(), 8, pArgs);
+#endif
+    }
+    else
+    {
+        SAL_WARN("desktop.updater", "Updater executable path: " << aUpdaterPath);
+        for (size_t i = 0; i < 8 + rtl_getAppCommandArgCount(); ++i)
+        {
+            SAL_WARN("desktop.updater", pArgs[i]);
+        }
+        bSuccess = false;
+    }
+
+    for (size_t i = 0; i < 8 + rtl_getAppCommandArgCount(); ++i)
+    {
+        delete[] pArgs[i];
+    }
+    delete[] pArgs;
+
+    return bSuccess;
+}
+
+namespace {
+
+// Callback to get the response data from server.
+size_t WriteCallback(void *ptr, size_t size,
+                            size_t nmemb, void *userp)
+{
+  if (!userp)
+    return 0;
+
+  std::string* response = static_cast<std::string *>(userp);
+  size_t real_size = size * nmemb;
+  response->append(static_cast<char *>(ptr), real_size);
+  return real_size;
+}
+
+
+
+class invalid_update_info : public std::exception
+{
+};
+
+class invalid_hash : public std::exception
+{
+    OString maMessage;
+public:
+
+    invalid_hash(const OUString& rExpectedHash, const OUString& rReceivedHash)
+      : maMessage(
+          OUStringToOString(
+            OUString("Invalid hash found.\nExpected: " + rExpectedHash + ";\nReceived: " + rReceivedHash),
+            RTL_TEXTENCODING_UTF8)
+         )
+    {
+    }
+
+    const char* what() const noexcept override
+    {
+        return maMessage.getStr();
+    }
+};
+
+class invalid_size : public std::exception
+{
+    OString maMessage;
+public:
+
+    invalid_size(const size_t nExpectedSize, const size_t nReceivedSize)
+      : maMessage(
+          OUStringToOString(
+            OUString("Invalid file size found.\nExpected: " + OUString::number(nExpectedSize) + ";\nReceived: " + OUString::number(nReceivedSize)),
+            RTL_TEXTENCODING_UTF8)
+         )
+    {
+    }
+
+    const char* what() const noexcept override
+    {
+        return maMessage.getStr();
+    }
+};
+
+OUString toOUString(const std::string& rStr)
+{
+    return OUString::fromUtf8(rStr.c_str());
+}
+
+update_file parse_update_file(orcus::json::node& rNode)
+{
+    if (rNode.type() != orcus::json::node_t::object)
+    {
+        SAL_WARN("desktop.updater", "invalid update or language file entry");
+        throw invalid_update_info();
+    }
+
+    if (rNode.child_count() < 4)
+    {
+        SAL_WARN("desktop.updater", "invalid update or language file entry");
+        throw invalid_update_info();
+    }
+
+    orcus::json::node aURLNode = rNode.child("url");
+    orcus::json::node aHashNode = rNode.child("hash");
+    orcus::json::node aHashTypeNode = rNode.child("hash_function");
+    orcus::json::node aSizeNode = rNode.child("size");
+
+    if (aHashTypeNode.string_value() != "sha512")
+    {
+        SAL_WARN("desktop.updater", "invalid hash type");
+        throw invalid_update_info();
+    }
+
+    update_file aUpdateFile;
+    aUpdateFile.aURL = toOUString(aURLNode.string_value().str());
+
+    if (aUpdateFile.aURL.isEmpty())
+        throw invalid_update_info();
+
+    aUpdateFile.aHash = toOUString(aHashNode.string_value().str());
+    aUpdateFile.nSize = static_cast<sal_uInt32>(aSizeNode.numeric_value());
+    return aUpdateFile;
+}
+
+update_info parse_response(const std::string& rResponse)
+{
+    orcus::json::document_tree aJsonDoc;
+    orcus::json_config aConfig;
+    aJsonDoc.load(rResponse, aConfig);
+
+    auto aDocumentRoot = aJsonDoc.get_document_root();
+    if (aDocumentRoot.type() != orcus::json::node_t::object)
+    {
+        SAL_WARN("desktop.updater", "invalid root entries: " << rResponse);
+        throw invalid_update_info();
+    }
+
+    auto aRootKeys = aDocumentRoot.keys();
+    if (std::find(aRootKeys.begin(), aRootKeys.end(), "error") != aRootKeys.end())
+    {
+        throw invalid_update_info();
+    }
+    else if (std::find(aRootKeys.begin(), aRootKeys.end(), "response") != aRootKeys.end())
+    {
+        update_info aUpdateInfo;
+        auto aMsgNode = aDocumentRoot.child("response");
+        aUpdateInfo.aMessage = toOUString(aMsgNode.string_value().str());
+        return aUpdateInfo;
+    }
+
+    orcus::json::node aFromNode = aDocumentRoot.child("from");
+    if (aFromNode.type() != orcus::json::node_t::string)
+    {
+        throw invalid_update_info();
+    }
+
+    orcus::json::node aSeeAlsoNode = aDocumentRoot.child("see also");
+    if (aSeeAlsoNode.type() != orcus::json::node_t::string)
+    {
+        throw invalid_update_info();
+    }
+
+    orcus::json::node aUpdateNode = aDocumentRoot.child("update");
+    if (aUpdateNode.type() != orcus::json::node_t::object)
+    {
+        throw invalid_update_info();
+    }
+
+    orcus::json::node aLanguageNode = aDocumentRoot.child("languages");
+    if (aUpdateNode.type() != orcus::json::node_t::object)
+    {
+        throw invalid_update_info();
+    }
+
+    update_info aUpdateInfo;
+    aUpdateInfo.aFromBuildID = toOUString(aFromNode.string_value().str());
+    aUpdateInfo.aSeeAlsoURL = toOUString(aSeeAlsoNode.string_value().str());
+
+    aUpdateInfo.aUpdateFile = parse_update_file(aUpdateNode);
+
+    std::vector<orcus::pstring> aLanguages = aLanguageNode.keys();
+    for (auto const& language : aLanguages)
+    {
+        language_file aLanguageFile;
+        auto aLangEntry = aLanguageNode.child(language);
+        aLanguageFile.aLangCode = toOUString(language.str());
+        aLanguageFile.aUpdateFile = parse_update_file(aLangEntry);
+        aUpdateInfo.aLanguageFiles.push_back(aLanguageFile);
+    }
+
+    return aUpdateInfo;
+}
+
+struct WriteDataFile
+{
+    comphelper::Hash maHash;
+    SvStream* mpStream;
+
+    WriteDataFile(SvStream* pStream):
+        maHash(comphelper::HashType::SHA512),
+        mpStream(pStream)
+    {
+    }
+
+    OUString getHash()
+    {
+        auto final_hash = maHash.finalize();
+        std::stringstream aStrm;
+        for (auto& i: final_hash)
+        {
+            aStrm << std::setw(2) << std::setfill('0') << std::hex << (int)i;
+        }
+
+        return toOUString(aStrm.str());
+    }
+};
+
+// Callback to get the response data from server to a file.
+size_t WriteCallbackFile(void *ptr, size_t size,
+                            size_t nmemb, void *userp)
+{
+  if (!userp)
+    return 0;
+
+  WriteDataFile* response = static_cast<WriteDataFile *>(userp);
+  size_t real_size = size * nmemb;
+  response->mpStream->WriteBytes(ptr, real_size);
+  response->maHash.update(static_cast<const unsigned char*>(ptr), real_size);
+  return real_size;
+}
+
+std::string download_content(const OString& rURL, bool bFile, OUString& rHash)
+{
+    Updater::log("Download: " + rURL);
+    std::unique_ptr<CURL, std::function<void(CURL *)>> curl(
+        curl_easy_init(), [](CURL * p) { curl_easy_cleanup(p); });
+
+    if (!curl)
+        return std::string();
+
+    curl_easy_setopt(curl.get(), CURLOPT_URL, rURL.getStr());
+    curl_easy_setopt(curl.get(), CURLOPT_USERAGENT, kUserAgent);
+    bool bUseProxy = false;
+    if (bUseProxy)
+    {
+        /*
+        curl_easy_setopt(curl, CURLOPT_PROXY, proxy.c_str());
+        curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, proxy_user_pwd.c_str());
+        */
+    }
+
+    char buf[] = "Expect:";
+    curl_slist* headerlist = nullptr;
+    headerlist = curl_slist_append(headerlist, buf);
+    curl_easy_setopt(curl.get(), CURLOPT_HTTPHEADER, headerlist);
+    curl_easy_setopt(curl.get(), CURLOPT_FOLLOWLOCATION, 1); // follow redirects
+    // only allow redirect to https://
+#if (LIBCURL_VERSION_MAJOR > 7) || (LIBCURL_VERSION_MAJOR == 7 && LIBCURL_VERSION_MINOR >= 85)
+    curl_easy_setopt(curl.get(), CURLOPT_REDIR_PROTOCOLS_STR, "https");
+#else
+    curl_easy_setopt(curl.get(), CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
+#endif
+
+    std::string response_body;
+    utl::TempFile aTempFile;
+    WriteDataFile aFile(aTempFile.GetStream(StreamMode::WRITE));
+    if (!bFile)
+    {
+        curl_easy_setopt(curl.get(), CURLOPT_WRITEFUNCTION, WriteCallback);
+        curl_easy_setopt(curl.get(), CURLOPT_WRITEDATA,
+                static_cast<void *>(&response_body));
+
+        aTempFile.EnableKillingFile(true);
+    }
+    else
+    {
+        OUString aTempFileURL = aTempFile.GetURL();
+        OString aTempFileURLOString = OUStringToOString(aTempFileURL, RTL_TEXTENCODING_UTF8);
+        response_body.append(aTempFileURLOString.getStr(), aTempFileURLOString.getLength());
+
+        aTempFile.EnableKillingFile(false);
+
+        curl_easy_setopt(curl.get(), CURLOPT_WRITEFUNCTION, WriteCallbackFile);
+        curl_easy_setopt(curl.get(), CURLOPT_WRITEDATA,
+                static_cast<void *>(&aFile));
+    }
+
+    // Fail if 400+ is returned from the web server.
+    curl_easy_setopt(curl.get(), CURLOPT_FAILONERROR, 1);
+
+    CURLcode cc = curl_easy_perform(curl.get());
+    long http_code = 0;
+    curl_easy_getinfo(curl.get(), CURLINFO_RESPONSE_CODE, &http_code);
+    if (http_code != 200)
+    {
+        SAL_WARN("desktop.updater", "download did not succeed. Error code: " << http_code);
+        throw error_updater("download did not succeed");
+    }
+
+    if (cc != CURLE_OK)
+    {
+        SAL_WARN("desktop.updater", "curl error: " << cc);
+        throw error_updater("curl error");
+    }
+
+    if (bFile)
+        rHash = aFile.getHash();
+
+    return response_body;
+}
+
+void handle_file_error(osl::FileBase::RC eError, const OUString& rMsg)
+{
+    switch (eError)
+    {
+        case osl::FileBase::E_None:
+        break;
+        default:
+            SAL_WARN("desktop.updater", "file error code: " << eError << ", " << rMsg);
+            throw error_updater(OUStringToOString(rMsg, RTL_TEXTENCODING_UTF8));
+    }
+}
+
+void download_file(const OUString& rURL, size_t nFileSize, const OUString& rHash, const OUString& aFileName)
+{
+    Updater::log("Download File: " + rURL + "; FileName: " + aFileName);
+    OString aURL = OUStringToOString(rURL, RTL_TEXTENCODING_UTF8);
+    OUString aHash;
+    std::string temp_file = download_content(aURL, true, aHash);
+    if (temp_file.empty())
+        throw error_updater("empty temp file string");
+
+    OUString aTempFile = OUString::fromUtf8(temp_file.c_str());
+    Updater::log("TempFile: " + aTempFile);
+    osl::File aDownloadedFile(aTempFile);
+    osl::FileBase::RC eError = aDownloadedFile.open(1);
+    handle_file_error(eError, "Could not open the download file: " + aTempFile);
+
+    sal_uInt64 nSize = 0;
+    eError = aDownloadedFile.getSize(nSize);
+    handle_file_error(eError, "Could not get the file size of the downloaded file: " + aTempFile);
+    if (nSize != nFileSize)
+    {
+        SAL_WARN("desktop.updater", "File sizes don't match. File might be corrupted.");
+        throw invalid_size(nFileSize, nSize);
+    }
+
+    if (aHash != rHash)
+    {
+        SAL_WARN("desktop.updater", "File hash don't match. File might be corrupted.");
+        throw invalid_hash(rHash, aHash);
+    }
+
+    OUString aPatchDirURL("${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("bootstrap") ":UserInstallation}/patch/");
+    rtl::Bootstrap::expandMacros(aPatchDirURL);
+    osl::Directory::create(aPatchDirURL);
+
+    OUString aDestFile = aPatchDirURL + aFileName;
+    Updater::log("Destination File: " + aDestFile);
+    aDownloadedFile.close();
+    eError = osl::File::move(aTempFile, aDestFile);
+    handle_file_error(eError, "Could not move the file from the Temp directory to the user config: TempFile: " + aTempFile + "; DestFile: " + aDestFile);
+}
+
+}
+
+void update_checker()
+{
+    OUString aBrandBaseDir("${BRAND_BASE_DIR}");
+    rtl::Bootstrap::expandMacros(aBrandBaseDir);
+    bool bUserWritable = isUserWritable(aBrandBaseDir);
+    if (!bUserWritable)
+    {
+        Updater::log("Can't update as the update location is not user writable");
+        return;
+    }
+
+    OUString aDownloadCheckBaseURL = officecfg::Office::Update::Update::URL::get();
+    static const char* pDownloadCheckBaseURLEnv = std::getenv("LIBO_UPDATER_URL");
+    if (pDownloadCheckBaseURLEnv)
+    {
+        aDownloadCheckBaseURL = OUString::createFromAscii(pDownloadCheckBaseURLEnv);
+    }
+
+    OUString aProductName = utl::ConfigManager::getProductName();
+    OUString aBuildID = Updater::getBuildID();
+
+    static const char* pBuildIdEnv = std::getenv("LIBO_UPDATER_BUILD");
+    if (pBuildIdEnv)
+    {
+        aBuildID = OUString::createFromAscii(pBuildIdEnv);
+    }
+
+    OUString aBuildTarget = "${_OS}_${_ARCH}";
+    rtl::Bootstrap::expandMacros(aBuildTarget);
+    OUString aChannel = Updater::getUpdateChannel();
+    static const char* pUpdateChannelEnv = std::getenv("LIBO_UPDATER_CHANNEL");
+    if (pUpdateChannelEnv)
+    {
+        aChannel = OUString::createFromAscii(pUpdateChannelEnv);
+    }
+
+    OUString aDownloadCheckURL = aDownloadCheckBaseURL + "update/check/1/" + aProductName +
+        "/" + aBuildID + "/" + aBuildTarget + "/" + aChannel;
+    OString aURL = OUStringToOString(aDownloadCheckURL, RTL_TEXTENCODING_UTF8);
+    Updater::log("Update check: " + aURL);
+
+    try
+    {
+        OUString aHash;
+        std::string response_body = download_content(aURL, false, aHash);
+        if (!response_body.empty())
+        {
+
+            update_info aUpdateInfo = parse_response(response_body);
+            if (aUpdateInfo.aUpdateFile.aURL.isEmpty())
+            {
+                // No update currently available
+                // add entry to updating.log with the message
+                SAL_WARN("desktop.updater", "Message received from the updater: " << aUpdateInfo.aMessage);
+                Updater::log("Server response: " + aUpdateInfo.aMessage);
+            }
+            else
+            {
+                css::uno::Sequence<OUString> aInstalledLanguages(officecfg::Setup::Office::InstalledLocales::get()->getElementNames());
+                std::set<OUString> aInstalledLanguageSet(std::begin(aInstalledLanguages), std::end(aInstalledLanguages));
+                download_file(aUpdateInfo.aUpdateFile.aURL, aUpdateInfo.aUpdateFile.nSize, aUpdateInfo.aUpdateFile.aHash, "update.mar");
+                for (auto& lang_update : aUpdateInfo.aLanguageFiles)
+                {
+                    // only download the language packs for installed languages
+                    if (aInstalledLanguageSet.find(lang_update.aLangCode) != aInstalledLanguageSet.end())
+                    {
+                        OUString aFileName = "update_" + lang_update.aLangCode + ".mar";
+                        download_file(lang_update.aUpdateFile.aURL, lang_update.aUpdateFile.nSize, lang_update.aUpdateFile.aHash, aFileName);
+                    }
+                }
+                OUString aSeeAlsoURL = aUpdateInfo.aSeeAlsoURL;
+                std::shared_ptr< comphelper::ConfigurationChanges > batch(
+                        comphelper::ConfigurationChanges::create());
+                officecfg::Office::Update::Update::SeeAlso::set(aSeeAlsoURL, batch);
+                batch->commit();
+            }
+        }
+    }
+    catch (const invalid_update_info&)
+    {
+        SAL_WARN("desktop.updater", "invalid update information");
+        Updater::log(OString("warning: invalid update info"));
+    }
+    catch (const error_updater& e)
+    {
+        SAL_WARN("desktop.updater", "error during the update check: " << e.what());
+        Updater::log(OString("warning: error by the updater") + e.what());
+    }
+    catch (const invalid_size& e)
+    {
+        SAL_WARN("desktop.updater", e.what());
+        Updater::log(OString("warning: invalid size"));
+    }
+    catch (const invalid_hash& e)
+    {
+        SAL_WARN("desktop.updater", e.what());
+        Updater::log(OString("warning: invalid hash"));
+    }
+    catch (...)
+    {
+        SAL_WARN("desktop.updater", "unknown error during the update check");
+        Updater::log(OString("warning: unknown exception"));
+    }
+}
+
+OUString Updater::getUpdateInfoLog()
+{
+    OUString aUpdateInfoURL("${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("bootstrap") ":UserInstallation}/patch/updating.log");
+    rtl::Bootstrap::expandMacros(aUpdateInfoURL);
+
+    return aUpdateInfoURL;
+}
+
+OUString Updater::getPatchDirURL()
+{
+    OUString aPatchDirURL("${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("bootstrap") ":UserInstallation}/patch/");
+    rtl::Bootstrap::expandMacros(aPatchDirURL);
+
+    return aPatchDirURL;
+}
+
+OUString Updater::getUpdateFileURL()
+{
+    return getPatchDirURL() + "update.mar";
+}
+
+OUString Updater::getInstallationPath()
+{
+    OUString aInstallDir( "$BRAND_BASE_DIR/");
+    rtl::Bootstrap::expandMacros(aInstallDir);
+
+    return getPathFromURL(aInstallDir);
+}
+
+OUString Updater::getExecutableDirURL()
+{
+    OUString aExeDir( "$BRAND_BASE_DIR/" LIBO_BIN_FOLDER "/" );
+    rtl::Bootstrap::expandMacros(aExeDir);
+
+    return aExeDir;
+}
+
+void Updater::log(const OUString& rMessage)
+{
+    SAL_INFO("desktop.updater", rMessage);
+    OUString aUpdateLog = getUpdateInfoLog();
+    SvFileStream aLog(aUpdateLog, StreamMode::STD_READWRITE);
+    aLog.Seek(aLog.Tell() + aLog.remainingSize()); // make sure we are at the end
+    aLog.WriteLine(OUStringToOString(rMessage, RTL_TEXTENCODING_UTF8));
+}
+
+void Updater::log(const OString& rMessage)
+{
+    SAL_INFO("desktop.updater", rMessage);
+    OUString aUpdateLog = getUpdateInfoLog();
+    SvFileStream aLog(aUpdateLog, StreamMode::STD_READWRITE);
+    aLog.Seek(aLog.Tell() + aLog.remainingSize()); // make sure we are at the end
+    aLog.WriteLine(rMessage);
+}
+
+void Updater::log(const char* pMessage)
+{
+    SAL_INFO("desktop.updater", pMessage);
+    OUString aUpdateLog = getUpdateInfoLog();
+    SvFileStream aLog(aUpdateLog, StreamMode::STD_READWRITE);
+    aLog.Seek(aLog.Tell() + aLog.remainingSize()); // make sure we are at the end
+    aLog.WriteCharPtr(pMessage);
+}
+
+OUString Updater::getBuildID()
+{
+    OUString aBuildID("${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version") ":buildid}");
+    rtl::Bootstrap::expandMacros(aBuildID);
+
+    return aBuildID;
+}
+
+OUString Updater::getUpdateChannel()
+{
+    OUString aUpdateChannel("${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version") ":UpdateChannel}");
+    rtl::Bootstrap::expandMacros(aUpdateChannel);
+
+    return aUpdateChannel;
+}
+
+void Updater::removeUpdateFiles()
+{
+    Updater::log("Removing: " + getUpdateFileURL());
+    osl::File::remove(getUpdateFileURL());
+
+    OUString aPatchDirURL = getPatchDirURL();
+    osl::Directory aDir(aPatchDirURL);
+    aDir.open();
+
+    osl::FileBase::RC eRC;
+    do
+    {
+        osl::DirectoryItem aItem;
+        eRC = aDir.getNextItem(aItem);
+        if (eRC == osl::FileBase::E_None)
+        {
+            osl::FileStatus aStatus(osl_FileStatus_Mask_All);
+            if (aItem.getFileStatus(aStatus) != osl::FileBase::E_None)
+                continue;
+
+            if (!aStatus.isRegular())
+                continue;
+
+            OUString aURL = aStatus.getFileURL();
+            if (!aURL.endsWith(".mar"))
+                continue;
+
+            Updater::log("Removing. " + aURL);
+            osl::File::remove(aURL);
+        }
+    }
+    while (eRC == osl::FileBase::E_None);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/updater.hxx b/desktop/source/app/updater.hxx
new file mode 100644
index 000000000..7f1ea920f
--- /dev/null
+++ b/desktop/source/app/updater.hxx
@@ -0,0 +1,37 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+
+bool update();
+
+void update_checker();
+
+class Updater
+{
+public:
+    static OUString getUpdateInfoLog();
+    static OUString getPatchDirURL();
+    static OUString getUpdateFileURL();
+    static OUString getExecutableDirURL();
+    static OUString getInstallationPath();
+
+    static OUString getBuildID();
+    static OUString getUpdateChannel();
+
+    static void log(const OUString& rMessage);
+    static void log(const OString& rMessage);
+    static void log(const char* pMessage);
+
+    static void removeUpdateFiles();
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/userinstall.cxx b/desktop/source/app/userinstall.cxx
new file mode 100644
index 000000000..669a7316c
--- /dev/null
+++ b/desktop/source/app/userinstall.cxx
@@ -0,0 +1,176 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <com/sun/star/uno/Exception.hpp>
+#include <comphelper/configuration.hxx>
+#include <config_folders.h>
+#include <officecfg/Setup.hxx>
+#include <osl/file.h>
+#include <osl/file.hxx>
+#if defined ANDROID || defined IOS || defined EMSCRIPTEN
+#include <rtl/bootstrap.hxx>
+#endif
+#include <rtl/ustring.hxx>
+#include <tools/diagnose_ex.h>
+#include <unotools/bootstrap.hxx>
+
+#include "userinstall.hxx"
+
+namespace desktop::userinstall {
+
+namespace {
+
+#if !(defined ANDROID || defined IOS || defined EMSCRIPTEN)
+osl::FileBase::RC copyRecursive(
+    OUString const & srcUri, OUString const & dstUri)
+{
+    osl::DirectoryItem item;
+    osl::FileBase::RC e = osl::DirectoryItem::get(srcUri, item);
+    if (e != osl::FileBase::E_None) {
+        return e;
+    }
+    osl::FileStatus stat1(osl_FileStatus_Mask_Type);
+    e = item.getFileStatus(stat1);
+    if (e != osl::FileBase::E_None) {
+        return e;
+    }
+    if (stat1.getFileType() == osl::FileStatus::Directory) {
+        e = osl::Directory::create(dstUri);
+        if (e != osl::FileBase::E_None && e != osl::FileBase::E_EXIST) {
+            return e;
+        }
+        osl::Directory dir(srcUri);
+        e = dir.open();
+        if (e != osl::FileBase::E_None) {
+            return e;
+        }
+        for (;;) {
+            e = dir.getNextItem(item);
+            if (e == osl::FileBase::E_NOENT) {
+                break;
+            }
+            if (e != osl::FileBase::E_None) {
+                return e;
+            }
+            osl::FileStatus stat2(
+                osl_FileStatus_Mask_FileName | osl_FileStatus_Mask_FileURL);
+            e = item.getFileStatus(stat2);
+            if (e != osl::FileBase::E_None) {
+                return e;
+            }
+            assert(!dstUri.endsWith("/"));
+            e = copyRecursive(
+                stat2.getFileURL(), dstUri + "/" + stat2.getFileName());
+                // assumes that all files under presets/ have names that can be
+                // copied unencoded into file URLs
+            if (e != osl::FileBase::E_None) {
+                return e;
+            }
+        }
+        e = dir.close();
+    } else {
+        e = osl::File::copy(srcUri, dstUri);
+        if (e == osl::FileBase::E_EXIST) {
+            // Assume an earlier attempt failed half-way through:
+            e = osl::FileBase::E_None;
+        }
+    }
+    return e;
+}
+#endif
+
+Status create(OUString const & uri) {
+    osl::FileBase::RC e = osl::Directory::createPath(uri);
+    if (e != osl::FileBase::E_None && e != osl::FileBase::E_EXIST) {
+        return ERROR_OTHER;
+    }
+#if !(defined ANDROID || defined IOS || defined EMSCRIPTEN)
+#if defined UNIX
+    // Set safer permissions for the user directory by default:
+    osl::File::setAttributes(
+        uri,
+        (osl_File_Attribute_OwnWrite | osl_File_Attribute_OwnRead
+         | osl_File_Attribute_OwnExe));
+#endif
+    // As of now osl_copyFile does not work on Android => don't do this:
+    OUString baseUri;
+    if (utl::Bootstrap::locateBaseInstallation(baseUri)
+        != utl::Bootstrap::PATH_EXISTS)
+    {
+        return ERROR_OTHER;
+    }
+    switch (copyRecursive(
+                baseUri + "/" LIBO_SHARE_PRESETS_FOLDER, uri + "/user"))
+    {
+    case osl::FileBase::E_None:
+        break;
+    case osl::FileBase::E_ACCES:
+        return ERROR_CANT_WRITE;
+    case osl::FileBase::E_NOSPC:
+        return ERROR_NO_SPACE;
+    default:
+        return ERROR_OTHER;
+    }
+#else
+    // On (Android and) iOS, just create the user directory. Later code fails mysteriously if it
+    // doesn't exist.
+    OUString userDir("${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("bootstrap") ":UserInstallation}/user");
+    rtl::Bootstrap::expandMacros(userDir);
+    osl::Directory::createPath(userDir);
+#endif
+    std::shared_ptr<comphelper::ConfigurationChanges> batch(
+        comphelper::ConfigurationChanges::create());
+    officecfg::Setup::Office::ooSetupInstCompleted::set(true, batch);
+    batch->commit();
+    return CREATED;
+}
+
+bool isCreated() {
+    try {
+        return officecfg::Setup::Office::ooSetupInstCompleted::get();
+    } catch (const css::uno::Exception &) {
+        TOOLS_WARN_EXCEPTION("desktop.app", "ignoring");
+        return false;
+    }
+}
+
+}
+
+Status finalize() {
+    OUString uri;
+    switch (utl::Bootstrap::locateUserInstallation(uri)) {
+    case utl::Bootstrap::PATH_EXISTS:
+        if (isCreated()) {
+            return EXISTED;
+        }
+        [[fallthrough]];
+    case utl::Bootstrap::PATH_VALID:
+        return create(uri);
+    default:
+        return ERROR_OTHER;
+    }
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/app/userinstall.hxx b/desktop/source/app/userinstall.hxx
new file mode 100644
index 000000000..527df2dcc
--- /dev/null
+++ b/desktop/source/app/userinstall.hxx
@@ -0,0 +1,38 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+namespace desktop::userinstall
+{
+enum Status
+{
+    EXISTED,
+    CREATED,
+    ERROR_NO_SPACE,
+    ERROR_CANT_WRITE,
+    ERROR_OTHER
+};
+
+Status finalize();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/deployment.component b/desktop/source/deployment/deployment.component
new file mode 100644
index 000000000..f7a481bf4
--- /dev/null
+++ b/desktop/source/deployment/deployment.component
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.deployment.ExtensionManager"
+    constructor="com_sun_star_comp_deployment_ExtensionManager_get_implementation">
+    <service name="com.sun.star.comp.deployment.ExtensionManager"/>
+    <singleton name="com.sun.star.deployment.ExtensionManager"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.PackageInformationProvider"
+    constructor="com_sun_star_comp_deployment_PackageInformationProvider_get_implementation">
+    <service name="com.sun.star.comp.deployment.PackageInformationProvider"/>
+    <singleton name="com.sun.star.deployment.PackageInformationProvider"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.PackageManagerFactory"
+    constructor="com_sun_star_comp_deployment_PackageManagerFactory_get_implementation">
+    <service name="com.sun.star.comp.deployment.PackageManagerFactory"/>
+    <singleton name="com.sun.star.deployment.thePackageManagerFactory"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.ProgressLog"
+    constructor="com_sun_star_comp_deployment_ProgressLog_get_implementation">
+    <service name="com.sun.star.comp.deployment.ProgressLog"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.component.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_component_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.configuration.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_configuration_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.executable.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_executable_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.help.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_help_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.script.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_script_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.sfwk.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_sfwk_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+</component>
diff --git a/desktop/source/deployment/dp_log.cxx b/desktop/source/deployment/dp_log.cxx
new file mode 100644
index 000000000..9cdf8d071
--- /dev/null
+++ b/desktop/source/deployment/dp_log.cxx
@@ -0,0 +1,143 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <comphelper/anytostring.hxx>
+#include <comphelper/logging.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <com/sun/star/logging/LogLevel.hpp>
+#include <com/sun/star/ucb/XProgressHandler.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::logging;
+
+namespace dp_log {
+
+typedef ::cppu::WeakComponentImplHelper<ucb::XProgressHandler, lang::XServiceInfo> t_log_helper;
+
+namespace {
+
+class ProgressLogImpl : public cppu::BaseMutex, public t_log_helper
+{
+    std::unique_ptr<comphelper::EventLogger> m_logger;
+
+protected:
+    virtual void SAL_CALL disposing() override;
+    virtual ~ProgressLogImpl() override;
+
+public:
+    ProgressLogImpl( Sequence<Any> const & args,
+                     Reference<XComponentContext> const & xContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XProgressHandler
+    virtual void SAL_CALL push( Any const & Status ) override;
+    virtual void SAL_CALL update( Any const & Status ) override;
+    virtual void SAL_CALL pop() override;
+};
+
+}
+
+ProgressLogImpl::~ProgressLogImpl()
+{
+}
+
+
+void ProgressLogImpl::disposing()
+{
+}
+
+
+ProgressLogImpl::ProgressLogImpl(
+    Sequence<Any> const & /* args */,
+    Reference<XComponentContext> const & xContext )
+    : t_log_helper( m_aMutex )
+{
+    // Use the logger created by unopkg app
+    m_logger.reset(new comphelper::EventLogger(xContext, "unopkg"));
+}
+
+// XServiceInfo
+OUString ProgressLogImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.ProgressLog";
+}
+
+sal_Bool ProgressLogImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > ProgressLogImpl::getSupportedServiceNames()
+{
+    // a private one
+    return { "com.sun.star.comp.deployment.ProgressLog" };
+}
+
+// XProgressHandler
+
+void ProgressLogImpl::push( Any const & Status )
+{
+    update( Status );
+}
+
+void ProgressLogImpl::update( Any const & Status )
+{
+    if (! Status.hasValue())
+        return;
+
+    OUStringBuffer buf;
+
+    OUString msg;
+    sal_Int32 logLevel = LogLevel::INFO;
+    if (Status >>= msg) {
+        buf.append( msg );
+    }
+    else {
+        logLevel = LogLevel::SEVERE;
+        buf.append( ::comphelper::anyToString(Status) );
+    }
+    m_logger->log(logLevel, buf.makeStringAndClear());
+}
+
+
+void ProgressLogImpl::pop()
+{
+}
+
+} // namespace dp_log
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_ProgressLog_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_log::ProgressLogImpl(args, context));
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/dp_persmap.cxx b/desktop/source/deployment/dp_persmap.cxx
new file mode 100644
index 000000000..8b032fffb
--- /dev/null
+++ b/desktop/source/deployment/dp_persmap.cxx
@@ -0,0 +1,312 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cstddef>
+
+#include <dp_misc.h>
+#include <dp_persmap.h>
+#include <o3tl/safeint.hxx>
+#include <rtl/byteseq.hxx>
+#include <rtl/strbuf.hxx>
+#include <sal/log.hxx>
+
+using namespace ::rtl;
+
+// the persistent map is used to manage a handful of key-value string pairs
+// this implementation replaces a rather heavy-weight berkeleydb integration
+
+// the file backing up a persistent map consists of line pairs with
+// - a key string   (encoded with chars 0x00..0x0F being escaped)
+// - a value string (encoded with chars 0x00..0x0F being escaped)
+
+namespace dp_misc
+{
+
+const char PmapMagic[4] = {'P','m','p','1'};
+
+PersistentMap::PersistentMap( OUString const & url_ )
+:    m_MapFile( expandUnoRcUrl(url_) )
+,    m_bIsOpen( false )
+,    m_bToBeCreated( true )
+,    m_bIsDirty( false )
+{
+    open();
+}
+
+PersistentMap::PersistentMap()
+:    m_MapFile( OUString() )
+,    m_bIsOpen( false )
+,    m_bToBeCreated( false )
+,    m_bIsDirty( false )
+{}
+
+PersistentMap::~PersistentMap()
+{
+    if( m_bIsDirty )
+        flush();
+    if( m_bIsOpen )
+        m_MapFile.close();
+}
+
+
+// replace 0x00..0x0F with "%0".."%F"
+// replace "%" with "%%"
+static OString encodeString( const OString& rStr)
+{
+    const char* pChar = rStr.getStr();
+    const sal_Int32 nLen = rStr.getLength();
+    sal_Int32 i = nLen;
+    // short circuit for the simple non-encoded case
+    while( --i >= 0)
+    {
+        const unsigned char c = static_cast<unsigned char>(*(pChar++));
+        if( c <= 0x0F )
+            break;
+        if( c == '%')
+            break;
+    }
+    if( i < 0)
+        return rStr;
+
+    // escape chars 0x00..0x0F with "%0".."%F"
+    OStringBuffer aEncStr( nLen + 32);
+    aEncStr.append( pChar - (nLen-i), nLen - i);
+    while( --i >= 0)
+    {
+        unsigned char c = static_cast<unsigned char>(*(pChar++));
+        if( c <= 0x0F )
+        {
+            aEncStr.append( '%');
+            c += (c <= 0x09) ? '0' : 'A'-10;
+        } else if( c == '%')
+            aEncStr.append( '%');
+        aEncStr.append( char(c) );
+    }
+
+    return aEncStr.makeStringAndClear();
+}
+
+// replace "%0".."%F" with 0x00..0x0F
+// replace "%%" with "%"
+static OString decodeString( const char* pEncChars, int nLen)
+{
+    const char* pChar = pEncChars;
+    sal_Int32 i = nLen;
+    // short circuit for the simple non-encoded case
+    while( --i >= 0)
+        if( *(pChar++) == '%')
+            break;
+    if( i < 0)
+        return OString( pEncChars, nLen);
+
+    // replace escaped chars with their decoded counterparts
+    OStringBuffer aDecStr( nLen);
+    pChar = pEncChars;
+    for( i = nLen; --i >= 0;)
+    {
+        char c = *(pChar++);
+        // handle escaped character
+        if( c == '%')
+        {
+            --i;
+            OSL_ASSERT( i >= 0);
+            c = *(pChar++);
+            if( ('0' <= c) && (c <= '9'))
+                c -= '0';
+            else
+            {
+                OSL_ASSERT( ('A' <= c) && (c <= 'F'));
+                c -= ('A'-10);
+            }
+        }
+        aDecStr.append( c);
+    }
+
+    return aDecStr.makeStringAndClear();
+}
+
+void PersistentMap::open()
+{
+    // open the existing file
+    sal_uInt32 const nOpenFlags = osl_File_OpenFlag_Read | osl_File_OpenFlag_Write;
+
+    const osl::File::RC rcOpen = m_MapFile.open( nOpenFlags);
+    m_bIsOpen = (rcOpen == osl::File::E_None);
+
+    // or create later if needed
+    m_bToBeCreated &= (rcOpen == osl::File::E_NOENT) && !m_bIsOpen;
+
+    if( !m_bIsOpen)
+        return;
+
+    readAll();
+}
+
+
+void PersistentMap::readAll()
+{
+    // prepare for re-reading the map-file
+    m_entries.clear();
+    const osl::FileBase::RC nRes = m_MapFile.setPos( osl_Pos_Absolut, 0);
+    if (nRes != osl::FileBase::E_None)
+    {
+        SAL_WARN("desktop.deployment", "setPos failed with " << +nRes);
+        return;
+    }
+
+    // read header and check magic
+    char aHeaderBytes[ sizeof(PmapMagic)];
+    sal_uInt64 nBytesRead = 0;
+    m_MapFile.read( aHeaderBytes, sizeof(aHeaderBytes), nBytesRead);
+    OSL_ASSERT( nBytesRead == sizeof(aHeaderBytes));
+    if( nBytesRead != sizeof(aHeaderBytes))
+        return;
+    // check header magic
+    for( std::size_t i = 0; i < sizeof(PmapMagic); ++i)
+        if( aHeaderBytes[i] != PmapMagic[i])
+            return;
+
+    // read key value pairs and add them to the map
+    ByteSequence aKeyLine;
+    ByteSequence aValLine;
+    for(;;)
+    {
+        // read key-value line pair
+        // an empty key name indicates the end of the line pairs
+        if( m_MapFile.readLine( aKeyLine) != osl::File::E_None)
+            return;
+        if( !aKeyLine.getLength())
+            break;
+        if( m_MapFile.readLine( aValLine) != osl::File::E_None)
+            return;
+        // decode key and value strings
+        const OString aKeyName = decodeString( reinterpret_cast<char const *>(aKeyLine.getConstArray()), aKeyLine.getLength());
+        const OString aValName = decodeString( reinterpret_cast<char const *>(aValLine.getConstArray()), aValLine.getLength());
+        // insert key-value pair into map
+        add( aKeyName, aValName );
+        // check end-of-file status
+        sal_Bool bIsEOF = true;
+        if( m_MapFile.isEndOfFile( &bIsEOF) != osl::File::E_None )
+            return;
+        if( bIsEOF )
+            break;
+    }
+
+    m_bIsDirty = false;
+}
+
+void PersistentMap::flush()
+{
+    if( !m_bIsDirty)
+        return;
+    if( m_bToBeCreated && !m_entries.empty())
+    {
+        const sal_uInt32 nOpenFlags = osl_File_OpenFlag_Read | osl_File_OpenFlag_Write | osl_File_OpenFlag_Create;
+        const osl::File::RC rcOpen = m_MapFile.open( nOpenFlags);
+        m_bIsOpen = (rcOpen == osl::File::E_None);
+        m_bToBeCreated = !m_bIsOpen;
+    }
+    if( !m_bIsOpen)
+        return;
+
+    // write header magic
+    const osl::FileBase::RC nRes = m_MapFile.setPos( osl_Pos_Absolut, 0);
+    if (nRes != osl::FileBase::E_None)
+    {
+        SAL_WARN("desktop.deployment", "setPos failed with " << +nRes);
+        return;
+    }
+    sal_uInt64 nBytesWritten = 0;
+    m_MapFile.write( PmapMagic, sizeof(PmapMagic), nBytesWritten);
+
+    // write key value pairs
+    for (auto const& entry : m_entries)
+    {
+        // write line for key
+        const OString aKeyString = encodeString( entry.first);
+        const sal_Int32 nKeyLen = aKeyString.getLength();
+        m_MapFile.write( aKeyString.getStr(), nKeyLen, nBytesWritten);
+        OSL_ASSERT( o3tl::make_unsigned(nKeyLen) == nBytesWritten);
+        m_MapFile.write( "\n", 1, nBytesWritten);
+        // write line for value
+        const OString& rValString = encodeString( entry.second);
+        const sal_Int32 nValLen = rValString.getLength();
+        m_MapFile.write( rValString.getStr(), nValLen, nBytesWritten);
+        OSL_ASSERT( o3tl::make_unsigned(nValLen) == nBytesWritten);
+        m_MapFile.write( "\n", 1, nBytesWritten);
+    }
+
+    // write a file delimiter (an empty key-string)
+    m_MapFile.write( "\n", 1, nBytesWritten);
+    // truncate file here
+    sal_uInt64 nNewFileSize;
+    if( m_MapFile.getPos( nNewFileSize) == osl::File::E_None)
+        m_MapFile.setSize( nNewFileSize);
+    // flush to disk
+    m_MapFile.sync();
+    // the in-memory map now matches to the file on disk
+    m_bIsDirty = false;
+}
+
+bool PersistentMap::has( OString const & key ) const
+{
+    return get( nullptr, key );
+}
+
+bool PersistentMap::get( OString * value, OString const & key ) const
+{
+    t_string2string_map::const_iterator it = m_entries.find( key);
+    if( it == m_entries.end())
+        return false;
+    if( value)
+        *value = it->second;
+    return true;
+}
+
+void PersistentMap::add( OString const & key, OString const & value )
+{
+    auto r = m_entries.emplace(key,value);
+    m_bIsDirty = r.second;
+}
+
+
+void PersistentMap::put( OString const & key, OString const & value )
+{
+    add( key, value);
+    // HACK: flush now as the extension manager does not seem
+    //       to properly destruct this object in some situations
+    if(m_bIsDirty)
+        flush();
+}
+
+bool PersistentMap::erase( OString const & key )
+{
+    size_t nCount = m_entries.erase( key);
+    if( !nCount)
+        return false;
+    m_bIsDirty = true;
+    flush();
+    return true;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/dp_xml.cxx b/desktop/source/deployment/dp_xml.cxx
new file mode 100644
index 000000000..d61267e2f
--- /dev/null
+++ b/desktop/source/deployment/dp_xml.cxx
@@ -0,0 +1,51 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <dp_xml.h>
+#include <ucbhelper/content.hxx>
+#include <com/sun/star/xml/sax/Parser.hpp>
+
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_misc
+{
+
+
+void xml_parse(
+    Reference<xml::sax::XDocumentHandler> const & xDocHandler,
+    ::ucbhelper::Content & ucb_content,
+    Reference<XComponentContext> const & xContext )
+{
+    // raise sax parser:
+    Reference<xml::sax::XParser> xParser = xml::sax::Parser::create(xContext);
+
+    // error handler, entity resolver omitted
+    xParser->setDocumentHandler( xDocHandler );
+    xml::sax::InputSource source;
+    source.aInputStream = ucb_content.openStream();
+    source.sSystemId = ucb_content.getURL();
+    xParser->parseStream( source );
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/deploymentgui.component b/desktop/source/deployment/gui/deploymentgui.component
new file mode 100644
index 000000000..3b56863c1
--- /dev/null
+++ b/desktop/source/deployment/gui/deploymentgui.component
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.deployment.ui.LicenseDialog"
+    constructor="desktop_LicenseDialog_get_implementation">
+    <service name="com.sun.star.deployment.ui.LicenseDialog"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.ui.PackageManagerDialog"
+    constructor="desktop_ServiceImpl_get_implementation">
+    <service name="com.sun.star.deployment.ui.PackageManagerDialog"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.ui.UpdateRequiredDialog"
+    constructor="desktop_UpdateRequiredDialogService_get_implementation">
+    <service name="com.sun.star.deployment.ui.UpdateRequiredDialog"/>
+  </implementation>
+</component>
diff --git a/desktop/source/deployment/gui/dp_gui.h b/desktop/source/deployment/gui/dp_gui.h
new file mode 100644
index 000000000..cb2932ca4
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui.h
@@ -0,0 +1,28 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+namespace dp_gui {
+
+enum PackageState { REGISTERED, NOT_REGISTERED, AMBIGUOUS, NOT_AVAILABLE };
+
+} // namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_dependencydialog.cxx b/desktop/source/deployment/gui/dp_gui_dependencydialog.cxx
new file mode 100644
index 000000000..f94b29891
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_dependencydialog.cxx
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <rtl/ustring.hxx>
+#include <vcl/weld.hxx>
+
+#include "dp_gui_dependencydialog.hxx"
+
+using dp_gui::DependencyDialog;
+
+DependencyDialog::DependencyDialog(weld::Window* parent, std::vector<OUString> const& dependencies)
+    : GenericDialogController(parent, "desktop/ui/dependenciesdialog.ui", "Dependencies")
+    , m_xList(m_xBuilder->weld_tree_view("depListTreeview"))
+{
+    m_xList->set_size_request(-1, m_xList->get_height_rows(10));
+    for (auto const& dependency : dependencies)
+    {
+        m_xList->append_text(dependency);
+    }
+}
+
+DependencyDialog::~DependencyDialog() {}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_dependencydialog.hxx b/desktop/source/deployment/gui/dp_gui_dependencydialog.hxx
new file mode 100644
index 000000000..bdbab41d1
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_dependencydialog.hxx
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vcl/weld.hxx>
+
+#include <vector>
+
+namespace vcl
+{
+class Window;
+}
+
+namespace dp_gui
+{
+class DependencyDialog : public weld::GenericDialogController
+{
+public:
+    DependencyDialog(weld::Window* parent, std::vector<OUString> const& dependencies);
+    virtual ~DependencyDialog() override;
+
+private:
+    DependencyDialog(DependencyDialog const&) = delete;
+    DependencyDialog& operator=(DependencyDialog const&) = delete;
+
+    std::unique_ptr<weld::TreeView> m_xList;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_dialog2.cxx b/desktop/source/deployment/gui/dp_gui_dialog2.cxx
new file mode 100644
index 000000000..7fd0bdac3
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_dialog2.cxx
@@ -0,0 +1,1403 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_extensions.h>
+
+#include <strings.hrc>
+#include <helpids.h>
+
+#include "dp_gui.h"
+#include "dp_gui_dialog2.hxx"
+#include "dp_gui_extlistbox.hxx"
+#include <dp_shared.hxx>
+#include "dp_gui_theextmgr.hxx"
+#include "dp_gui_extensioncmdqueue.hxx"
+#include <dp_misc.h>
+#include <dp_update.hxx>
+#include <dp_identifier.hxx>
+
+#include <fpicker/strings.hrc>
+
+#include <utility>
+#include <vcl/commandevent.hxx>
+#include <vcl/svapp.hxx>
+
+#include <osl/mutex.hxx>
+#include <sal/log.hxx>
+#include <rtl/ustrbuf.hxx>
+
+#include <svtools/restartdialog.hxx>
+
+#include <sfx2/filedlghelper.hxx>
+#include <sfx2/sfxdlg.hxx>
+
+#include <comphelper/anytostring.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <comphelper/processfactory.hxx>
+#include <tools/diagnose_ex.h>
+#include <unotools/configmgr.hxx>
+
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/system/SystemShellExecuteFlags.hpp>
+#include <com/sun/star/system/SystemShellExecute.hpp>
+
+#include <com/sun/star/ui/dialogs/ExecutableDialogResults.hpp>
+#include <com/sun/star/ui/dialogs/TemplateDescription.hpp>
+#include <com/sun/star/ui/dialogs/XFilePicker3.hpp>
+
+#include <officecfg/Office/ExtensionManager.hxx>
+
+#include <map>
+#include <memory>
+#include <vector>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::system;
+
+
+namespace dp_gui {
+
+constexpr OUStringLiteral USER_PACKAGE_MANAGER = u"user";
+constexpr OUStringLiteral SHARED_PACKAGE_MANAGER = u"shared";
+constexpr OUStringLiteral BUNDLED_PACKAGE_MANAGER = u"bundled";
+
+// ExtBoxWithBtns_Impl
+class ExtBoxWithBtns_Impl : public ExtensionBox_Impl
+{
+    bool            m_bInterfaceLocked;
+
+    ExtMgrDialog*   m_pParent;
+
+    void            SetButtonStatus( const TEntry_Impl& rEntry );
+    OString         ShowPopupMenu( const Point &rPos, const tools::Long nPos );
+
+public:
+    explicit ExtBoxWithBtns_Impl(std::unique_ptr<weld::ScrolledWindow> xScroll);
+
+    void InitFromDialog(ExtMgrDialog *pParentDialog);
+
+    virtual bool    MouseButtonDown( const MouseEvent& rMEvt ) override;
+    virtual bool    Command( const CommandEvent& rCEvt ) override;
+
+    virtual void    RecalcAll() override;
+    virtual void    selectEntry( const tools::Long nPos ) override;
+
+    void            enableButtons( bool bEnable );
+};
+
+ExtBoxWithBtns_Impl::ExtBoxWithBtns_Impl(std::unique_ptr<weld::ScrolledWindow> xScroll)
+    : ExtensionBox_Impl(std::move(xScroll))
+    , m_bInterfaceLocked(false)
+    , m_pParent(nullptr)
+{
+}
+
+void ExtBoxWithBtns_Impl::InitFromDialog(ExtMgrDialog *pParentDialog)
+{
+    setExtensionManager(pParentDialog->getExtensionManager());
+
+    m_pParent = pParentDialog;
+}
+
+void ExtBoxWithBtns_Impl::RecalcAll()
+{
+    const sal_Int32 nActive = getSelIndex();
+
+    if ( nActive != ExtensionBox_Impl::ENTRY_NOTFOUND )
+    {
+        SetButtonStatus( GetEntryData( nActive) );
+    }
+    else
+    {
+        m_pParent->enableOptionsButton( false );
+        m_pParent->enableRemoveButton( false );
+        m_pParent->enableEnableButton( false );
+    }
+
+    ExtensionBox_Impl::RecalcAll();
+}
+
+
+//This function may be called with nPos < 0
+void ExtBoxWithBtns_Impl::selectEntry( const tools::Long nPos )
+{
+    if ( HasActive() && ( nPos == getSelIndex() ) )
+        return;
+
+    ExtensionBox_Impl::selectEntry( nPos );
+}
+
+void ExtBoxWithBtns_Impl::SetButtonStatus(const TEntry_Impl& rEntry)
+{
+    bool bShowOptionBtn = true;
+
+    rEntry->m_bHasButtons = false;
+    if ( ( rEntry->m_eState == REGISTERED ) || ( rEntry->m_eState == NOT_AVAILABLE ) )
+    {
+        m_pParent->enableButtontoEnable( false );
+    }
+    else
+    {
+        m_pParent->enableButtontoEnable( true );
+        bShowOptionBtn = false;
+    }
+
+    if ( ( !rEntry->m_bUser || ( rEntry->m_eState == NOT_AVAILABLE ) || rEntry->m_bMissingDeps )
+         && !rEntry->m_bMissingLic )
+    {
+        m_pParent->enableEnableButton( false );
+    }
+    else
+    {
+        m_pParent->enableEnableButton( !rEntry->m_bLocked );
+        rEntry->m_bHasButtons = true;
+    }
+
+    if ( rEntry->m_bHasOptions && bShowOptionBtn )
+    {
+        m_pParent->enableOptionsButton( true );
+        rEntry->m_bHasButtons = true;
+    }
+    else
+    {
+        m_pParent->enableOptionsButton( false );
+    }
+
+    if ( rEntry->m_bUser || rEntry->m_bShared )
+    {
+        m_pParent->enableRemoveButton( !rEntry->m_bLocked );
+        rEntry->m_bHasButtons = true;
+    }
+    else
+    {
+        m_pParent->enableRemoveButton( false );
+    }
+}
+
+bool ExtBoxWithBtns_Impl::Command(const CommandEvent& rCEvt)
+{
+    if (rCEvt.GetCommand() != CommandEventId::ContextMenu)
+        return ExtensionBox_Impl::Command(rCEvt);
+
+    const Point aMousePos(rCEvt.GetMousePosPixel());
+    const auto nPos = PointToPos(aMousePos);
+    OString sCommand = ShowPopupMenu(aMousePos, nPos);
+
+    if (sCommand == "CMD_ENABLE")
+        m_pParent->enablePackage( GetEntryData( nPos )->m_xPackage, true );
+    else if (sCommand == "CMD_DISABLE")
+        m_pParent->enablePackage( GetEntryData( nPos )->m_xPackage, false );
+    else if (sCommand == "CMD_UPDATE")
+        m_pParent->updatePackage( GetEntryData( nPos )->m_xPackage );
+    else if (sCommand == "CMD_REMOVE")
+        m_pParent->removePackage( GetEntryData( nPos )->m_xPackage );
+    else if (sCommand == "CMD_SHOW_LICENSE")
+    {
+        m_pParent->incBusy();
+        ShowLicenseDialog aLicenseDlg(m_pParent->getDialog(), GetEntryData(nPos)->m_xPackage);
+        aLicenseDlg.run();
+        m_pParent->decBusy();
+    }
+
+    return true;
+}
+
+OString ExtBoxWithBtns_Impl::ShowPopupMenu( const Point & rPos, const tools::Long nPos )
+{
+    if ( nPos >= static_cast<tools::Long>(getItemCount()) )
+        return "CMD_NONE";
+
+    std::unique_ptr<weld::Builder> xBuilder(Application::CreateBuilder(nullptr, "desktop/ui/extensionmenu.ui"));
+    std::unique_ptr<weld::Menu> xPopup(xBuilder->weld_menu("menu"));
+
+#if ENABLE_EXTENSION_UPDATE
+    xPopup->append("CMD_UPDATE", DpResId( RID_CTX_ITEM_CHECK_UPDATE ) );
+#endif
+
+    if ( ! GetEntryData( nPos )->m_bLocked )
+    {
+        if ( GetEntryData( nPos )->m_bUser )
+        {
+            if ( GetEntryData( nPos )->m_eState == REGISTERED )
+                xPopup->append("CMD_DISABLE", DpResId(RID_CTX_ITEM_DISABLE));
+            else if ( GetEntryData( nPos )->m_eState != NOT_AVAILABLE )
+                xPopup->append("CMD_ENABLE", DpResId(RID_CTX_ITEM_ENABLE));
+        }
+        if (!officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionRemoval::get())
+        {
+            xPopup->append("CMD_REMOVE", DpResId(RID_CTX_ITEM_REMOVE));
+        }
+    }
+
+    if ( !GetEntryData( nPos )->m_sLicenseText.isEmpty() )
+        xPopup->append("CMD_SHOW_LICENSE", DpResId(RID_STR_SHOW_LICENSE_CMD));
+
+    return xPopup->popup_at_rect(GetDrawingArea(), tools::Rectangle(rPos, Size(1, 1)));
+}
+
+bool ExtBoxWithBtns_Impl::MouseButtonDown( const MouseEvent& rMEvt )
+{
+    if (m_bInterfaceLocked)
+        return false;
+    return ExtensionBox_Impl::MouseButtonDown(rMEvt);
+}
+
+void ExtBoxWithBtns_Impl::enableButtons( bool bEnable )
+{
+    m_bInterfaceLocked = ! bEnable;
+
+    if ( bEnable )
+    {
+        sal_Int32 nIndex = getSelIndex();
+        if ( nIndex != ExtensionBox_Impl::ENTRY_NOTFOUND )
+            SetButtonStatus( GetEntryData( nIndex ) );
+    }
+    else
+    {
+        m_pParent->enableEnableButton( false );
+        m_pParent->enableOptionsButton( false );
+        m_pParent->enableRemoveButton( false );
+    }
+}
+
+//                             DialogHelper
+
+DialogHelper::DialogHelper(const uno::Reference< uno::XComponentContext > &xContext,
+                           weld::Window* pWindow)
+    : m_pWindow(pWindow)
+    , m_nEventID(nullptr)
+{
+    m_xContext = xContext;
+}
+
+DialogHelper::~DialogHelper()
+{
+    if ( m_nEventID )
+        Application::RemoveUserEvent( m_nEventID );
+}
+
+
+bool DialogHelper::IsSharedPkgMgr( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    return xPackage->getRepositoryName() == SHARED_PACKAGE_MANAGER;
+}
+
+bool DialogHelper::continueOnSharedExtension( const uno::Reference< deployment::XPackage > &xPackage,
+                                              weld::Widget* pParent,
+                                              TranslateId pResID,
+                                              bool &bHadWarning )
+{
+    if ( !bHadWarning && IsSharedPkgMgr( xPackage ) )
+    {
+        const SolarMutexGuard guard;
+        incBusy();
+        std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(pParent,
+                                                  VclMessageType::Warning, VclButtonsType::OkCancel, DpResId(pResID)));
+        bHadWarning = true;
+
+        bool bRet = RET_OK == xBox->run();
+        xBox.reset();
+        decBusy();
+        return bRet;
+    }
+    else
+        return true;
+}
+
+void DialogHelper::openWebBrowser(const OUString& sURL, const OUString& sTitle)
+{
+    if ( sURL.isEmpty() ) // Nothing to do, when the URL is empty
+        return;
+
+    try
+    {
+        uno::Reference< XSystemShellExecute > xSystemShellExecute(
+            SystemShellExecute::create(m_xContext));
+        //throws css::lang::IllegalArgumentException, css::system::SystemShellExecuteException
+        xSystemShellExecute->execute( sURL, OUString(),  SystemShellExecuteFlags::URIS_ONLY );
+    }
+    catch ( const uno::Exception& )
+    {
+        uno::Any exc( ::cppu::getCaughtException() );
+        OUString msg( ::comphelper::anyToString( exc ) );
+        const SolarMutexGuard guard;
+        incBusy();
+        std::unique_ptr<weld::MessageDialog> xErrorBox(Application::CreateMessageDialog(getFrameWeld(),
+                                                       VclMessageType::Warning, VclButtonsType::Ok, msg));
+        xErrorBox->set_title(sTitle);
+        xErrorBox->run();
+        xErrorBox.reset();
+        decBusy();
+    }
+}
+
+bool DialogHelper::installExtensionWarn(std::u16string_view rExtensionName)
+{
+    const SolarMutexGuard guard;
+
+    // Check if extension installation is disabled in the expert configurations
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get())
+    {
+        incBusy();
+        std::unique_ptr<weld::MessageDialog> xWarnBox(Application::CreateMessageDialog(getFrameWeld(),
+                                                      VclMessageType::Warning, VclButtonsType::Ok,
+                                                      DpResId(RID_STR_WARNING_INSTALL_EXTENSION_DISABLED)));
+        xWarnBox->run();
+        xWarnBox.reset();
+        decBusy();
+
+        return false;
+    }
+
+    incBusy();
+    std::unique_ptr<weld::MessageDialog> xInfoBox(Application::CreateMessageDialog(getFrameWeld(),
+                                                  VclMessageType::Warning, VclButtonsType::OkCancel,
+                                                  DpResId(RID_STR_WARNING_INSTALL_EXTENSION)));
+    OUString sText(xInfoBox->get_primary_text());
+    sText = sText.replaceAll("%NAME", rExtensionName);
+    xInfoBox->set_primary_text(sText);
+
+    bool bRet = RET_OK == xInfoBox->run();
+    xInfoBox.reset();
+    decBusy();
+    return bRet;
+}
+
+bool DialogHelper::installForAllUsers(bool &bInstallForAll)
+{
+    const SolarMutexGuard guard;
+    incBusy();
+    std::unique_ptr<weld::Builder> xBuilder(Application::CreateBuilder(getFrameWeld(), "desktop/ui/installforalldialog.ui"));
+    std::unique_ptr<weld::MessageDialog> xQuery(xBuilder->weld_message_dialog("InstallForAllDialog"));
+    short nRet = xQuery->run();
+    xQuery.reset();
+    decBusy();
+    if (nRet == RET_CANCEL)
+        return false;
+
+    bInstallForAll = ( nRet == RET_NO );
+    return true;
+}
+
+void DialogHelper::PostUserEvent( const Link<void*,void>& rLink, void* pCaller )
+{
+    if ( m_nEventID )
+        Application::RemoveUserEvent( m_nEventID );
+
+    m_nEventID = Application::PostUserEvent(rLink, pCaller);
+}
+
+//                             ExtMgrDialog
+ExtMgrDialog::ExtMgrDialog(weld::Window *pParent, TheExtensionManager *pManager)
+    : GenericDialogController(pParent, "desktop/ui/extensionmanager.ui", "ExtensionManagerDialog")
+    , DialogHelper(pManager->getContext(), m_xDialog.get())
+    , m_sAddPackages(DpResId(RID_STR_ADD_PACKAGES))
+    , m_bHasProgress(false)
+    , m_bProgressChanged(false)
+    , m_bStartProgress(false)
+    , m_bStopProgress(false)
+    , m_bEnableWarning(false)
+    , m_bDisableWarning(false)
+    , m_bDeleteWarning(false)
+    , m_bClosed(false)
+    , m_nProgress(0)
+    , m_aIdle( "ExtMgrDialog m_aIdle TimeOutHdl" )
+    , m_pManager(pManager)
+    , m_xExtensionBox(new ExtBoxWithBtns_Impl(m_xBuilder->weld_scrolled_window("scroll", true)))
+    , m_xExtensionBoxWnd(new weld::CustomWeld(*m_xBuilder, "extensions", *m_xExtensionBox))
+    , m_xOptionsBtn(m_xBuilder->weld_button("optionsbtn"))
+    , m_xAddBtn(m_xBuilder->weld_button("addbtn"))
+    , m_xRemoveBtn(m_xBuilder->weld_button("removebtn"))
+    , m_xEnableBtn(m_xBuilder->weld_button("enablebtn"))
+    , m_xUpdateBtn(m_xBuilder->weld_button("updatebtn"))
+    , m_xCloseBtn(m_xBuilder->weld_button("close"))
+    , m_xBundledCbx(m_xBuilder->weld_check_button("bundled"))
+    , m_xSharedCbx(m_xBuilder->weld_check_button("shared"))
+    , m_xUserCbx(m_xBuilder->weld_check_button("user"))
+    , m_xGetExtensions(m_xBuilder->weld_link_button("getextensions"))
+    , m_xProgressText(m_xBuilder->weld_label("progressft"))
+    , m_xProgressBar(m_xBuilder->weld_progress_bar("progressbar"))
+    , m_xCancelBtn(m_xBuilder->weld_button("cancel"))
+    , m_xSearchEntry(m_xBuilder->weld_entry("search"))
+{
+    m_xExtensionBox->InitFromDialog(this);
+
+    m_xEnableBtn->set_help_id(HID_EXTENSION_MANAGER_LISTBOX_ENABLE);
+
+    m_xOptionsBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleOptionsBtn ) );
+    m_xAddBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleAddBtn ) );
+    m_xRemoveBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleRemoveBtn ) );
+    m_xEnableBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleEnableBtn ) );
+    m_xCloseBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleCloseBtn ) );
+
+    m_xCancelBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleCancelBtn ) );
+
+    m_xBundledCbx->connect_toggled( LINK( this, ExtMgrDialog, HandleExtTypeCbx ) );
+    m_xSharedCbx->connect_toggled( LINK( this, ExtMgrDialog, HandleExtTypeCbx ) );
+    m_xUserCbx->connect_toggled( LINK( this, ExtMgrDialog, HandleExtTypeCbx ) );
+
+    m_xSearchEntry->connect_changed( LINK( this, ExtMgrDialog, HandleSearch ) );
+
+    m_xBundledCbx->set_active(true);
+    m_xSharedCbx->set_active(true);
+    m_xUserCbx->set_active(true);
+
+    m_xProgressBar->hide();
+
+#if ENABLE_EXTENSION_UPDATE
+    m_xUpdateBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleUpdateBtn ) );
+    m_xUpdateBtn->set_sensitive(false);
+#else
+    m_xUpdateBtn->hide();
+#endif
+
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get())
+    {
+        m_xAddBtn->set_sensitive(false);
+        m_xAddBtn->set_tooltip_text(DpResId(RID_STR_WARNING_INSTALL_EXTENSION_DISABLED));
+    }
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionRemoval::get())
+    {
+        m_xRemoveBtn->set_sensitive(false);
+        m_xRemoveBtn->set_tooltip_text(DpResId(RID_STR_WARNING_REMOVE_EXTENSION_DISABLED));
+    }
+
+    m_aIdle.SetPriority(TaskPriority::LOWEST);
+    m_aIdle.SetInvokeHandler( LINK( this, ExtMgrDialog, TimeOutHdl ) );
+}
+
+ExtMgrDialog::~ExtMgrDialog()
+{
+    m_aIdle.Stop();
+}
+
+void ExtMgrDialog::setGetExtensionsURL( const OUString &rURL )
+{
+    m_xGetExtensions->set_uri( rURL );
+}
+
+void ExtMgrDialog::addPackageToList( const uno::Reference< deployment::XPackage > &xPackage,
+                                     bool bLicenseMissing )
+{
+    const SolarMutexGuard aGuard;
+    m_xUpdateBtn->set_sensitive(true);
+
+    bool bSearchMatch = m_xSearchEntry->get_text().isEmpty();
+    if (!m_xSearchEntry->get_text().isEmpty()
+        && xPackage->getDisplayName().toAsciiLowerCase().indexOf(
+               m_xSearchEntry->get_text().toAsciiLowerCase())
+               >= 0)
+    {
+        bSearchMatch = true;
+    }
+
+    if (!bSearchMatch)
+        return;
+
+    if (m_xBundledCbx->get_active() && (xPackage->getRepositoryName() == BUNDLED_PACKAGE_MANAGER) )
+    {
+        m_xExtensionBox->addEntry( xPackage, bLicenseMissing );
+    }
+    else if (m_xSharedCbx->get_active() && (xPackage->getRepositoryName() == SHARED_PACKAGE_MANAGER) )
+    {
+        m_xExtensionBox->addEntry( xPackage, bLicenseMissing );
+    }
+    else if (m_xUserCbx->get_active() && (xPackage->getRepositoryName() == USER_PACKAGE_MANAGER ))
+    {
+        m_xExtensionBox->addEntry( xPackage, bLicenseMissing );
+    }
+}
+
+void ExtMgrDialog::updateList()
+{
+    // re-creates the list of packages with addEntry selecting the packages
+    prepareChecking();
+    m_pManager->createPackageList();
+    checkEntries();
+}
+
+void ExtMgrDialog::prepareChecking()
+{
+    m_xExtensionBox->prepareChecking();
+}
+
+void ExtMgrDialog::checkEntries()
+{
+    const SolarMutexGuard guard;
+    m_xExtensionBox->checkEntries();
+}
+
+bool ExtMgrDialog::removeExtensionWarn(std::u16string_view rExtensionName)
+{
+    const SolarMutexGuard guard;
+    incBusy();
+    std::unique_ptr<weld::MessageDialog> xInfoBox(Application::CreateMessageDialog(m_xDialog.get(),
+                                                  VclMessageType::Warning, VclButtonsType::OkCancel,
+                                                  DpResId(RID_STR_WARNING_REMOVE_EXTENSION)));
+
+    OUString sText(xInfoBox->get_primary_text());
+    sText = sText.replaceAll("%NAME", rExtensionName);
+    xInfoBox->set_primary_text(sText);
+
+    bool bRet = RET_OK == xInfoBox->run();
+    xInfoBox.reset();
+    decBusy();
+
+    return bRet;
+}
+
+void ExtMgrDialog::enablePackage( const uno::Reference< deployment::XPackage > &xPackage,
+                                  bool bEnable )
+{
+    if ( !xPackage.is() )
+        return;
+
+    if ( bEnable )
+    {
+        if (!continueOnSharedExtension(xPackage, m_xDialog.get(), RID_STR_WARNING_ENABLE_SHARED_EXTENSION, m_bEnableWarning))
+            return;
+    }
+    else
+    {
+        if (!continueOnSharedExtension(xPackage, m_xDialog.get(), RID_STR_WARNING_DISABLE_SHARED_EXTENSION, m_bDisableWarning))
+            return;
+    }
+
+    m_pManager->getCmdQueue()->enableExtension( xPackage, bEnable );
+}
+
+
+void ExtMgrDialog::removePackage( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return;
+
+    if ( !IsSharedPkgMgr( xPackage ) || m_bDeleteWarning )
+    {
+        if ( ! removeExtensionWarn( xPackage->getDisplayName() ) )
+            return;
+    }
+
+    if (!continueOnSharedExtension(xPackage, m_xDialog.get(), RID_STR_WARNING_REMOVE_SHARED_EXTENSION, m_bDeleteWarning))
+        return;
+
+    m_pManager->getCmdQueue()->removeExtension( xPackage );
+}
+
+
+void ExtMgrDialog::updatePackage( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return;
+
+    // get the extension with highest version
+    uno::Sequence<uno::Reference<deployment::XPackage> > seqExtensions =
+    m_pManager->getExtensionManager()->getExtensionsWithSameIdentifier(
+        dp_misc::getIdentifier(xPackage), xPackage->getName(), uno::Reference<ucb::XCommandEnvironment>());
+    uno::Reference<deployment::XPackage> extension =
+        dp_misc::getExtensionWithHighestVersion(seqExtensions);
+    OSL_ASSERT(extension.is());
+    std::vector< css::uno::Reference< css::deployment::XPackage > > vEntries { extension };
+
+    m_pManager->getCmdQueue()->checkForUpdates( std::move(vEntries) );
+}
+
+
+bool ExtMgrDialog::acceptLicense( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return false;
+
+    m_pManager->getCmdQueue()->acceptLicense( xPackage );
+
+    return true;
+}
+
+
+uno::Sequence< OUString > ExtMgrDialog::raiseAddPicker()
+{
+    sfx2::FileDialogHelper aDlgHelper(ui::dialogs::TemplateDescription::FILEOPEN_SIMPLE, FileDialogFlags::NONE, m_xDialog.get());
+    aDlgHelper.SetContext(sfx2::FileDialogHelper::ExtensionManager);
+    const uno::Reference<ui::dialogs::XFilePicker3>& xFilePicker = aDlgHelper.GetFilePicker();
+    xFilePicker->setTitle( m_sAddPackages );
+
+    // collect and set filter list:
+    typedef std::map< OUString, OUString > t_string2string;
+    t_string2string title2filter;
+    OUStringBuffer supportedFilters;
+
+    const uno::Sequence< uno::Reference< deployment::XPackageTypeInfo > > packageTypes(
+        m_pManager->getExtensionManager()->getSupportedPackageTypes() );
+
+    for ( uno::Reference< deployment::XPackageTypeInfo > const & xPackageType : packageTypes )
+    {
+        const OUString filter( xPackageType->getFileFilter() );
+        if (!filter.isEmpty())
+        {
+            const OUString title( xPackageType->getShortDescription() );
+            const std::pair< t_string2string::iterator, bool > insertion(
+                title2filter.emplace( title, filter ) );
+            if (!supportedFilters.isEmpty())
+                supportedFilters.append(';');
+            supportedFilters.append(filter);
+            if ( ! insertion.second )
+            { // already existing, append extensions:
+                insertion.first->second = insertion.first->second +
+                    ";" + filter;
+            }
+        }
+    }
+
+    static const OUString StrAllFiles = []()
+        {
+            const SolarMutexGuard guard;
+            std::locale loc = Translate::Create("fps");
+            return Translate::get(STR_FILTERNAME_ALL, loc);
+        }();
+
+    // All files at top:
+    xFilePicker->appendFilter( StrAllFiles, "*.*" );
+    xFilePicker->appendFilter( DpResId(RID_STR_ALL_SUPPORTED), supportedFilters.makeStringAndClear() );
+    // then supported ones:
+    for (auto const& elem : title2filter)
+    {
+        try
+        {
+            xFilePicker->appendFilter( elem.first, elem.second );
+        }
+        catch (const lang::IllegalArgumentException &)
+        {
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+    }
+    xFilePicker->setCurrentFilter( DpResId(RID_STR_ALL_SUPPORTED) );
+
+    if ( xFilePicker->execute() != ui::dialogs::ExecutableDialogResults::OK )
+        return uno::Sequence<OUString>(); // cancelled
+
+    uno::Sequence< OUString > files( xFilePicker->getSelectedFiles() );
+    OSL_ASSERT( files.hasElements() );
+    return files;
+}
+
+void ExtMgrDialog::enableOptionsButton( bool bEnable )
+{
+    m_xOptionsBtn->set_sensitive( bEnable );
+}
+
+void ExtMgrDialog::enableRemoveButton( bool bEnable )
+{
+    m_xRemoveBtn->set_sensitive( bEnable && !officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionRemoval::get());
+
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionRemoval::get())
+    {
+        m_xRemoveBtn->set_tooltip_text(DpResId(RID_STR_WARNING_REMOVE_EXTENSION_DISABLED));
+    }
+    else
+    {
+        m_xRemoveBtn->set_tooltip_text("");
+    }
+}
+
+void ExtMgrDialog::enableEnableButton( bool bEnable )
+{
+    m_xEnableBtn->set_sensitive( bEnable );
+}
+
+void ExtMgrDialog::enableButtontoEnable( bool bEnable )
+{
+    if (bEnable)
+    {
+        m_xEnableBtn->set_label( DpResId( RID_CTX_ITEM_ENABLE ) );
+        m_xEnableBtn->set_help_id( HID_EXTENSION_MANAGER_LISTBOX_ENABLE );
+    }
+    else
+    {
+        m_xEnableBtn->set_label( DpResId( RID_CTX_ITEM_DISABLE ) );
+        m_xEnableBtn->set_help_id( HID_EXTENSION_MANAGER_LISTBOX_DISABLE );
+    }
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleCancelBtn, weld::Button&, void)
+{
+    if ( m_xAbortChannel.is() )
+    {
+        try
+        {
+            m_xAbortChannel->sendAbort();
+        }
+        catch ( const uno::RuntimeException & )
+        {
+            TOOLS_WARN_EXCEPTION( "dbaccess", "" );
+        }
+    }
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleCloseBtn, weld::Button&, void)
+{
+    bool bCallClose = true;
+
+    //only suggest restart if modified and this is the first close attempt
+    if (!m_bClosed && m_pManager->isModified())
+    {
+        m_pManager->clearModified();
+
+        //only suggest restart if we're actually running, e.g. not from standalone unopkg gui
+        if (dp_misc::office_is_running())
+        {
+            SolarMutexGuard aGuard;
+            bCallClose = !::svtools::executeRestartDialog(comphelper::getProcessComponentContext(),
+                                                          m_xDialog.get(),
+                                                          svtools::RESTART_REASON_EXTENSION_INSTALL);
+        }
+    }
+
+    if (bCallClose)
+        m_xDialog->response(RET_CANCEL);
+}
+
+IMPL_LINK( ExtMgrDialog, startProgress, void*, _bLockInterface, void )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+    bool bLockInterface = static_cast<bool>(_bLockInterface);
+
+    if ( m_bStartProgress && !m_bHasProgress )
+        m_aIdle.Start();
+
+    if ( m_bStopProgress )
+    {
+        if ( m_xProgressBar->get_visible() )
+            m_xProgressBar->set_percentage( 100 );
+        m_xAbortChannel.clear();
+
+        SAL_INFO( "desktop.deployment", " startProgress handler: stop" );
+    }
+    else
+    {
+        SAL_INFO( "desktop.deployment", " startProgress handler: start" );
+    }
+
+    m_xCancelBtn->set_sensitive( bLockInterface );
+    m_xAddBtn->set_sensitive( !bLockInterface && !officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get());
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get())
+    {
+        m_xAddBtn->set_tooltip_text(DpResId(RID_STR_WARNING_INSTALL_EXTENSION_DISABLED));
+    }
+    else
+    {
+        m_xAddBtn->set_tooltip_text("");
+    }
+
+    m_xUpdateBtn->set_sensitive( !bLockInterface && m_xExtensionBox->getItemCount() );
+    m_xExtensionBox->enableButtons( !bLockInterface );
+
+    clearEventID();
+}
+
+
+void ExtMgrDialog::showProgress( bool _bStart )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    bool bStart = _bStart;
+
+    if ( bStart )
+    {
+        m_nProgress = 0;
+        m_bStartProgress = true;
+        SAL_INFO( "desktop.deployment", "showProgress start" );
+    }
+    else
+    {
+        m_nProgress = 100;
+        m_bStopProgress = true;
+        SAL_INFO( "desktop.deployment", "showProgress stop!" );
+    }
+
+    DialogHelper::PostUserEvent( LINK( this, ExtMgrDialog, startProgress ), reinterpret_cast<void*>(bStart) );
+    m_aIdle.Start();
+}
+
+
+void ExtMgrDialog::updateProgress( const tools::Long nProgress )
+{
+    if ( m_nProgress != nProgress )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+        m_nProgress = nProgress;
+        m_aIdle.Start();
+    }
+}
+
+
+void ExtMgrDialog::updateProgress( const OUString &rText,
+                                   const uno::Reference< task::XAbortChannel > &xAbortChannel)
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    m_xAbortChannel = xAbortChannel;
+    m_sProgressText = rText;
+    m_bProgressChanged = true;
+    m_aIdle.Start();
+}
+
+
+void ExtMgrDialog::updatePackageInfo( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    const SolarMutexGuard aGuard;
+    m_xExtensionBox->updateEntry( xPackage );
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleOptionsBtn, weld::Button&, void)
+{
+    const sal_Int32 nActive = m_xExtensionBox->getSelIndex();
+
+    if ( nActive != ExtensionBox_Impl::ENTRY_NOTFOUND )
+    {
+        SfxAbstractDialogFactory* pFact = SfxAbstractDialogFactory::Create();
+
+        OUString sExtensionId = m_xExtensionBox->GetEntryData( nActive )->m_xPackage->getIdentifier().Value;
+        ScopedVclPtr<VclAbstractDialog> pDlg(pFact->CreateOptionsDialog(m_xDialog.get(), sExtensionId));
+
+        pDlg->Execute();
+    }
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleAddBtn, weld::Button&, void)
+{
+    incBusy();
+
+    uno::Sequence< OUString > aFileList = raiseAddPicker();
+
+    if ( aFileList.hasElements() )
+    {
+        m_pManager->installPackage( aFileList[0] );
+    }
+
+    decBusy();
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleRemoveBtn, weld::Button&, void)
+{
+    const sal_Int32 nActive = m_xExtensionBox->getSelIndex();
+
+    if ( nActive != ExtensionBox_Impl::ENTRY_NOTFOUND )
+    {
+        TEntry_Impl pEntry = m_xExtensionBox->GetEntryData( nActive );
+        removePackage( pEntry->m_xPackage );
+    }
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleEnableBtn, weld::Button&, void)
+{
+    const sal_Int32 nActive = m_xExtensionBox->getSelIndex();
+
+    if ( nActive != ExtensionBox_Impl::ENTRY_NOTFOUND )
+    {
+        TEntry_Impl pEntry = m_xExtensionBox->GetEntryData( nActive );
+
+        if ( pEntry->m_bMissingLic )
+            acceptLicense( pEntry->m_xPackage );
+        else
+        {
+            const bool bEnable( pEntry->m_eState != REGISTERED );
+            enablePackage( pEntry->m_xPackage, bEnable );
+        }
+    }
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleExtTypeCbx, weld::Toggleable&, void)
+{
+    updateList();
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleSearch, weld::Entry&, void)
+{
+    updateList();
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleUpdateBtn, weld::Button&, void)
+{
+#if ENABLE_EXTENSION_UPDATE
+    m_pManager->checkUpdates();
+#else
+    (void) this;
+#endif
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, TimeOutHdl, Timer *, void)
+{
+    if ( m_bStopProgress )
+    {
+        m_bHasProgress = false;
+        m_bStopProgress = false;
+        m_xProgressText->hide();
+        m_xProgressBar->hide();
+        m_xCancelBtn->hide();
+    }
+    else
+    {
+        if ( m_bProgressChanged )
+        {
+            m_bProgressChanged = false;
+            m_xProgressText->set_label(m_sProgressText);
+        }
+
+        if ( m_bStartProgress )
+        {
+            m_bStartProgress = false;
+            m_bHasProgress = true;
+            m_xProgressBar->show();
+            m_xProgressText->show();
+            m_xCancelBtn->set_sensitive(true);
+            m_xCancelBtn->show();
+        }
+
+        if ( m_xProgressBar->get_visible() )
+            m_xProgressBar->set_percentage( static_cast<sal_uInt16>(m_nProgress) );
+    }
+}
+
+void ExtMgrDialog::Close()
+{
+    m_pManager->terminateDialog();
+    m_bClosed = true;
+}
+
+//UpdateRequiredDialog
+UpdateRequiredDialog::UpdateRequiredDialog(weld::Window *pParent, TheExtensionManager *pManager)
+    : GenericDialogController(pParent, "desktop/ui/updaterequireddialog.ui", "UpdateRequiredDialog")
+    , DialogHelper(pManager->getContext(), m_xDialog.get())
+    , m_sCloseText(DpResId(RID_STR_CLOSE_BTN))
+    , m_bHasProgress(false)
+    , m_bProgressChanged(false)
+    , m_bStartProgress(false)
+    , m_bStopProgress(false)
+    , m_bHasLockedEntries(false)
+    , m_nProgress(0)
+    , m_aIdle( "UpdateRequiredDialog m_aIdle TimeOutHdl" )
+    , m_pManager(pManager)
+    , m_xExtensionBox(new ExtensionBox_Impl(m_xBuilder->weld_scrolled_window("scroll", true)))
+    , m_xExtensionBoxWnd(new weld::CustomWeld(*m_xBuilder, "extensions", *m_xExtensionBox))
+    , m_xUpdateNeeded(m_xBuilder->weld_label("updatelabel"))
+    , m_xUpdateBtn(m_xBuilder->weld_button("ok"))
+    , m_xCloseBtn(m_xBuilder->weld_button("disable"))
+    , m_xCancelBtn(m_xBuilder->weld_button("cancel"))
+    , m_xProgressText(m_xBuilder->weld_label("progresslabel"))
+    , m_xProgressBar(m_xBuilder->weld_progress_bar("progress"))
+{
+    m_xExtensionBox->setExtensionManager(pManager);
+
+    m_xUpdateBtn->connect_clicked( LINK( this, UpdateRequiredDialog, HandleUpdateBtn ) );
+    m_xCloseBtn->connect_clicked( LINK( this, UpdateRequiredDialog, HandleCloseBtn ) );
+    m_xCancelBtn->connect_clicked( LINK( this, UpdateRequiredDialog, HandleCancelBtn ) );
+
+    OUString aText = m_xUpdateNeeded->get_label();
+    aText = aText.replaceAll(
+        "%PRODUCTNAME", utl::ConfigManager::getProductName());
+    m_xUpdateNeeded->set_label(aText);
+
+    m_xProgressBar->hide();
+    m_xUpdateBtn->set_sensitive( false );
+    m_xCloseBtn->grab_focus();
+
+    m_aIdle.SetPriority( TaskPriority::LOWEST );
+    m_aIdle.SetInvokeHandler( LINK( this, UpdateRequiredDialog, TimeOutHdl ) );
+}
+
+UpdateRequiredDialog::~UpdateRequiredDialog()
+{
+    m_aIdle.Stop();
+}
+
+void UpdateRequiredDialog::addPackageToList( const uno::Reference< deployment::XPackage > &xPackage,
+                                             bool bLicenseMissing )
+{
+    // We will only add entries to the list with unsatisfied dependencies
+    if ( !bLicenseMissing && !checkDependencies( xPackage ) )
+    {
+        m_bHasLockedEntries |= m_pManager->isReadOnly( xPackage );
+        const SolarMutexGuard aGuard;
+        m_xUpdateBtn->set_sensitive(true);
+        m_xExtensionBox->addEntry( xPackage );
+    }
+}
+
+
+void UpdateRequiredDialog::prepareChecking()
+{
+    m_xExtensionBox->prepareChecking();
+}
+
+
+void UpdateRequiredDialog::checkEntries()
+{
+    const SolarMutexGuard guard;
+    m_xExtensionBox->checkEntries();
+
+    if ( ! hasActiveEntries() )
+    {
+        m_xCloseBtn->set_label( m_sCloseText );
+        m_xCloseBtn->grab_focus();
+    }
+}
+
+
+IMPL_LINK_NOARG(UpdateRequiredDialog, HandleCancelBtn, weld::Button&, void)
+{
+    if ( m_xAbortChannel.is() )
+    {
+        try
+        {
+            m_xAbortChannel->sendAbort();
+        }
+        catch ( const uno::RuntimeException & )
+        {
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+    }
+}
+
+
+IMPL_LINK( UpdateRequiredDialog, startProgress, void*, _bLockInterface, void )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+    bool bLockInterface = static_cast<bool>(_bLockInterface);
+
+    if ( m_bStartProgress && !m_bHasProgress )
+        m_aIdle.Start();
+
+    if ( m_bStopProgress )
+    {
+        if ( m_xProgressBar->get_visible() )
+            m_xProgressBar->set_percentage( 100 );
+        m_xAbortChannel.clear();
+        SAL_INFO( "desktop.deployment", " startProgress handler: stop" );
+    }
+    else
+    {
+        SAL_INFO( "desktop.deployment", " startProgress handler: start" );
+    }
+
+    m_xCancelBtn->set_sensitive( bLockInterface );
+    m_xUpdateBtn->set_sensitive( false );
+    clearEventID();
+}
+
+
+void UpdateRequiredDialog::showProgress( bool _bStart )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    bool bStart = _bStart;
+
+    if ( bStart )
+    {
+        m_nProgress = 0;
+        m_bStartProgress = true;
+        SAL_INFO( "desktop.deployment", "showProgress start" );
+    }
+    else
+    {
+        m_nProgress = 100;
+        m_bStopProgress = true;
+        SAL_INFO( "desktop.deployment", "showProgress stop!" );
+    }
+
+    DialogHelper::PostUserEvent( LINK( this, UpdateRequiredDialog, startProgress ), reinterpret_cast<void*>(bStart) );
+    m_aIdle.Start();
+}
+
+
+void UpdateRequiredDialog::updateProgress( const tools::Long nProgress )
+{
+    if ( m_nProgress != nProgress )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+        m_nProgress = nProgress;
+        m_aIdle.Start();
+    }
+}
+
+
+void UpdateRequiredDialog::updateProgress( const OUString &rText,
+                                           const uno::Reference< task::XAbortChannel > &xAbortChannel)
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    m_xAbortChannel = xAbortChannel;
+    m_sProgressText = rText;
+    m_bProgressChanged = true;
+    m_aIdle.Start();
+}
+
+
+void UpdateRequiredDialog::updatePackageInfo( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    // We will remove all updated packages with satisfied dependencies, but
+    // we will show all disabled entries so the user sees the result
+    // of the 'disable all' button
+    const SolarMutexGuard aGuard;
+    if ( isEnabled( xPackage ) && checkDependencies( xPackage ) )
+        m_xExtensionBox->removeEntry( xPackage );
+    else
+        m_xExtensionBox->updateEntry( xPackage );
+
+    if ( ! hasActiveEntries() )
+    {
+        m_xCloseBtn->set_label( m_sCloseText );
+        m_xCloseBtn->grab_focus();
+    }
+}
+
+
+IMPL_LINK_NOARG(UpdateRequiredDialog, HandleUpdateBtn, weld::Button&, void)
+{
+    ::osl::ClearableMutexGuard aGuard( m_aMutex );
+
+    std::vector< uno::Reference< deployment::XPackage > > vUpdateEntries;
+    sal_Int32 nCount = m_xExtensionBox->GetEntryCount();
+
+    for ( sal_Int32 i = 0; i < nCount; ++i )
+    {
+        TEntry_Impl pEntry = m_xExtensionBox->GetEntryData( i );
+        vUpdateEntries.push_back( pEntry->m_xPackage );
+    }
+
+    aGuard.clear();
+
+    m_pManager->getCmdQueue()->checkForUpdates( std::move(vUpdateEntries) );
+}
+
+
+IMPL_LINK_NOARG(UpdateRequiredDialog, HandleCloseBtn, weld::Button&, void)
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !isBusy() )
+    {
+        if ( m_bHasLockedEntries )
+            m_xDialog->response(-1);
+        else if ( hasActiveEntries() )
+            disableAllEntries();
+        else
+            m_xDialog->response(RET_CANCEL);
+    }
+}
+
+
+IMPL_LINK_NOARG(UpdateRequiredDialog, TimeOutHdl, Timer *, void)
+{
+    if ( m_bStopProgress )
+    {
+        m_bHasProgress = false;
+        m_bStopProgress = false;
+        m_xProgressText->hide();
+        m_xProgressBar->hide();
+        m_xCancelBtn->hide();
+    }
+    else
+    {
+        if ( m_bProgressChanged )
+        {
+            m_bProgressChanged = false;
+            m_xProgressText->set_label( m_sProgressText );
+        }
+
+        if ( m_bStartProgress )
+        {
+            m_bStartProgress = false;
+            m_bHasProgress = true;
+            m_xProgressBar->show();
+            m_xProgressText->show();
+            m_xCancelBtn->set_sensitive(true);
+            m_xCancelBtn->show();
+        }
+
+        if (m_xProgressBar->get_visible())
+            m_xProgressBar->set_percentage(m_nProgress);
+    }
+}
+
+// VCL::Dialog
+short UpdateRequiredDialog::run()
+{
+    //ToDo
+    //I believe m_bHasLockedEntries was used to prevent showing extensions which cannot
+    //be disabled because they are in a read only repository. However, disabling extensions
+    //is now always possible because the registration data of all repositories
+    //are in the user installation.
+    //Therefore all extensions could be displayed and all the handling around m_bHasLockedEntries
+    //could be removed.
+    if ( m_bHasLockedEntries )
+    {
+        // Set other text, disable update btn, remove not shared entries from list;
+        m_xUpdateNeeded->set_label( DpResId( RID_STR_NO_ADMIN_PRIVILEGE ) );
+        m_xCloseBtn->set_label( DpResId( RID_STR_EXIT_BTN ) );
+        m_xUpdateBtn->set_sensitive( false );
+        m_xExtensionBox->RemoveUnlocked();
+    }
+
+    return GenericDialogController::run();
+}
+
+// Check dependencies of all packages
+
+bool UpdateRequiredDialog::isEnabled( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    bool bRegistered = false;
+    try {
+        beans::Optional< beans::Ambiguous< sal_Bool > > option( xPackage->isRegistered( uno::Reference< task::XAbortChannel >(),
+                                                                                        uno::Reference< ucb::XCommandEnvironment >() ) );
+        if ( option.IsPresent )
+        {
+            ::beans::Ambiguous< sal_Bool > const & reg = option.Value;
+            if ( reg.IsAmbiguous )
+                bRegistered = false;
+            else
+                bRegistered = reg.Value;
+        }
+        else
+            bRegistered = false;
+    }
+    catch ( const uno::RuntimeException & ) { throw; }
+    catch (const uno::Exception & ) {
+        TOOLS_WARN_EXCEPTION( "desktop", "" );
+        bRegistered = false;
+    }
+
+    return bRegistered;
+}
+
+// Checks the dependencies no matter if the extension is enabled or disabled!
+bool UpdateRequiredDialog::checkDependencies( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    bool bDependenciesValid = false;
+    try {
+        bDependenciesValid = xPackage->checkDependencies( uno::Reference< ucb::XCommandEnvironment >() );
+    }
+    catch ( const deployment::DeploymentException & ) {}
+    return bDependenciesValid;
+}
+
+
+bool UpdateRequiredDialog::hasActiveEntries()
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    bool bRet = false;
+    tools::Long nCount = m_xExtensionBox->GetEntryCount();
+    for ( tools::Long nIndex = 0; nIndex < nCount; nIndex++ )
+    {
+        TEntry_Impl pEntry = m_xExtensionBox->GetEntryData( nIndex );
+
+        if ( isEnabled(pEntry->m_xPackage) && !checkDependencies( pEntry->m_xPackage ) )
+        {
+            bRet = true;
+            break;
+        }
+    }
+
+    return bRet;
+}
+
+
+void UpdateRequiredDialog::disableAllEntries()
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    incBusy();
+
+    tools::Long nCount = m_xExtensionBox->GetEntryCount();
+    for ( tools::Long nIndex = 0; nIndex < nCount; nIndex++ )
+    {
+        TEntry_Impl pEntry = m_xExtensionBox->GetEntryData( nIndex );
+        m_pManager->getCmdQueue()->enableExtension( pEntry->m_xPackage, false );
+    }
+
+    decBusy();
+
+    if ( ! hasActiveEntries() )
+        m_xCloseBtn->set_label( m_sCloseText );
+}
+
+//                             ShowLicenseDialog
+ShowLicenseDialog::ShowLicenseDialog(weld::Window* pParent,
+                                     const uno::Reference< deployment::XPackage> &xPackage)
+    : GenericDialogController(pParent, "desktop/ui/showlicensedialog.ui", "ShowLicenseDialog")
+    , m_xLicenseText(m_xBuilder->weld_text_view("textview"))
+{
+    m_xLicenseText->set_size_request(m_xLicenseText->get_approximate_digit_width() * 72,
+                                     m_xLicenseText->get_height_rows(21));
+    m_xLicenseText->set_text(xPackage->getLicenseText());
+}
+
+ShowLicenseDialog::~ShowLicenseDialog()
+{
+}
+
+// UpdateRequiredDialogService
+
+UpdateRequiredDialogService::UpdateRequiredDialogService( SAL_UNUSED_PARAMETER uno::Sequence< uno::Any > const&,
+                                                          uno::Reference< uno::XComponentContext > xComponentContext )
+    : m_xComponentContext(std::move( xComponentContext ))
+{
+}
+
+// XServiceInfo
+OUString UpdateRequiredDialogService::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.ui.UpdateRequiredDialog";
+}
+
+sal_Bool UpdateRequiredDialogService::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > UpdateRequiredDialogService::getSupportedServiceNames()
+{
+    return { "com.sun.star.deployment.ui.UpdateRequiredDialog" };
+}
+
+
+// XExecutableDialog
+
+void UpdateRequiredDialogService::setTitle( OUString const & )
+{
+}
+
+
+sal_Int16 UpdateRequiredDialogService::execute()
+{
+    ::rtl::Reference< ::dp_gui::TheExtensionManager > xManager( TheExtensionManager::get(
+                                                              m_xComponentContext) );
+    xManager->createDialog( true );
+    sal_Int16 nRet = xManager->execute();
+
+    return nRet;
+}
+
+
+} //namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_dialog2.hxx b/desktop/source/deployment/gui/dp_gui_dialog2.hxx
new file mode 100644
index 000000000..a11ff494e
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_dialog2.hxx
@@ -0,0 +1,267 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vcl/timer.hxx>
+#include <vcl/idle.hxx>
+#include <vcl/locktoplevels.hxx>
+#include <vcl/customweld.hxx>
+#include <vcl/weld.hxx>
+
+#include <osl/mutex.hxx>
+
+#include <rtl/ustring.hxx>
+
+#include <cppuhelper/implbase.hxx>
+#include <unotools/resmgr.hxx>
+
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/ui/dialogs/XExecutableDialog.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+struct ImplSVEvent;
+
+namespace dp_gui {
+
+class ExtBoxWithBtns_Impl;
+class ExtensionBox_Impl;
+class TheExtensionManager;
+
+class DialogHelper
+{
+    css::uno::Reference< css::uno::XComponentContext > m_xContext;
+    weld::Window*   m_pWindow;
+    ImplSVEvent *   m_nEventID;
+    TopLevelWindowLocker m_aBusy;
+
+public:
+                    DialogHelper(const css::uno::Reference< css::uno::XComponentContext > &,
+                                 weld::Window* pWindow);
+    virtual        ~DialogHelper();
+
+    void            openWebBrowser(const OUString& rURL, const OUString& rTitle);
+    weld::Window*   getFrameWeld() const { return m_pWindow; }
+    void            PostUserEvent( const Link<void*,void>& rLink, void* pCaller );
+    void            clearEventID() { m_nEventID = nullptr; }
+
+    virtual void    showProgress( bool bStart ) = 0;
+    virtual void    updateProgress( const OUString &rText,
+                                    const css::uno::Reference< css::task::XAbortChannel > &xAbortChannel) = 0;
+    virtual void    updateProgress( const tools::Long nProgress ) = 0;
+
+    virtual void    updatePackageInfo( const css::uno::Reference< css::deployment::XPackage > &xPackage ) = 0;
+    virtual void    addPackageToList( const css::uno::Reference< css::deployment::XPackage > &xPackage,
+                                      bool bLicenseMissing = false ) = 0;
+
+    virtual void    prepareChecking() = 0;
+    virtual void    checkEntries() = 0;
+
+    static bool     IsSharedPkgMgr( const css::uno::Reference< css::deployment::XPackage > &);
+           bool     continueOnSharedExtension( const css::uno::Reference< css::deployment::XPackage > &,
+                                               weld::Widget* pParent,
+                                               TranslateId pResID,
+                                               bool &bHadWarning );
+
+    void            incBusy() { m_aBusy.incBusy(m_pWindow); }
+    void            decBusy() { m_aBusy.decBusy(); }
+    bool            isBusy() const { return m_aBusy.isBusy(); }
+    bool            installExtensionWarn(std::u16string_view rExtensionURL);
+    bool            installForAllUsers(bool &bInstallForAll);
+};
+
+class ExtMgrDialog : public weld::GenericDialogController
+                   , public DialogHelper
+{
+    const OUString       m_sAddPackages;
+    OUString             m_sProgressText;
+    ::osl::Mutex         m_aMutex;
+    bool                 m_bHasProgress;
+    bool                 m_bProgressChanged;
+    bool                 m_bStartProgress;
+    bool                 m_bStopProgress;
+    bool                 m_bEnableWarning;
+    bool                 m_bDisableWarning;
+    bool                 m_bDeleteWarning;
+    bool                 m_bClosed;
+    tools::Long                 m_nProgress;
+    Idle                 m_aIdle;
+    TheExtensionManager *m_pManager;
+
+    css::uno::Reference< css::task::XAbortChannel > m_xAbortChannel;
+
+    std::unique_ptr<ExtBoxWithBtns_Impl> m_xExtensionBox;
+    std::unique_ptr<weld::CustomWeld> m_xExtensionBoxWnd;
+    std::unique_ptr<weld::Button> m_xOptionsBtn;
+    std::unique_ptr<weld::Button> m_xAddBtn;
+    std::unique_ptr<weld::Button> m_xRemoveBtn;
+    std::unique_ptr<weld::Button> m_xEnableBtn;
+    std::unique_ptr<weld::Button> m_xUpdateBtn;
+    std::unique_ptr<weld::Button> m_xCloseBtn;
+    std::unique_ptr<weld::CheckButton> m_xBundledCbx;
+    std::unique_ptr<weld::CheckButton> m_xSharedCbx;
+    std::unique_ptr<weld::CheckButton> m_xUserCbx;
+    std::unique_ptr<weld::LinkButton> m_xGetExtensions;
+    std::unique_ptr<weld::Label> m_xProgressText;
+    std::unique_ptr<weld::ProgressBar> m_xProgressBar;
+    std::unique_ptr<weld::Button> m_xCancelBtn;
+    std::unique_ptr<weld::Entry> m_xSearchEntry;
+
+    bool removeExtensionWarn(std::u16string_view rExtensionTitle);
+
+    DECL_LINK( HandleOptionsBtn, weld::Button&, void );
+    DECL_LINK( HandleAddBtn, weld::Button&, void );
+    DECL_LINK( HandleRemoveBtn, weld::Button&, void );
+    DECL_LINK( HandleEnableBtn, weld::Button&, void );
+    DECL_LINK( HandleUpdateBtn, weld::Button&, void );
+    DECL_LINK( HandleCancelBtn, weld::Button&, void );
+    DECL_LINK( HandleCloseBtn, weld::Button&, void );
+    DECL_LINK( HandleExtTypeCbx, weld::Toggleable&, void );
+    DECL_LINK( HandleSearch, weld::Entry&, void );
+    DECL_LINK( TimeOutHdl, Timer *, void );
+    DECL_LINK( startProgress, void *, void );
+
+public:
+    ExtMgrDialog(weld::Window * pParent, TheExtensionManager *pManager);
+    virtual ~ExtMgrDialog() override;
+
+    virtual void    showProgress( bool bStart ) override;
+    virtual void    updateProgress( const OUString &rText,
+                                    const css::uno::Reference< css::task::XAbortChannel > &xAbortChannel) override;
+    virtual void    updateProgress( const tools::Long nProgress ) override;
+
+    virtual void    updatePackageInfo( const css::uno::Reference< css::deployment::XPackage > &xPackage ) override;
+
+    void            setGetExtensionsURL( const OUString &rURL );
+    virtual void    addPackageToList( const css::uno::Reference< css::deployment::XPackage > &,
+                                      bool bLicenseMissing = false ) override;
+    void enablePackage(const css::uno::Reference< css::deployment::XPackage > &xPackage,
+                        bool bEnable );
+    void removePackage(const css::uno::Reference< css::deployment::XPackage > &xPackage );
+    void updatePackage(const css::uno::Reference< css::deployment::XPackage > &xPackage );
+    bool acceptLicense(const css::uno::Reference< css::deployment::XPackage > &xPackage );
+
+    void Close();
+
+    TheExtensionManager*    getExtensionManager() const { return m_pManager; }
+
+    virtual void    updateList();
+    virtual void    prepareChecking() override;
+    virtual void    checkEntries() override;
+
+    css::uno::Sequence< OUString > raiseAddPicker();
+
+    void enableOptionsButton( bool bEnable );
+    void enableRemoveButton( bool bEnable );
+    void enableEnableButton( bool bEnable );
+    /*
+     * Transform the button to "Enable", or to "Disable"
+     * based on the value of bEnable.
+     */
+    void enableButtontoEnable( bool bEnable );
+};
+
+
+class UpdateRequiredDialog : public weld::GenericDialogController
+                           , public DialogHelper
+{
+    const OUString       m_sCloseText;
+    OUString             m_sProgressText;
+    ::osl::Mutex         m_aMutex;
+    bool                 m_bHasProgress;
+    bool                 m_bProgressChanged;
+    bool                 m_bStartProgress;
+    bool                 m_bStopProgress;
+    bool                 m_bHasLockedEntries;
+    tools::Long                 m_nProgress;
+    Idle                 m_aIdle;
+    TheExtensionManager *m_pManager;
+
+    css::uno::Reference< css::task::XAbortChannel > m_xAbortChannel;
+
+    std::unique_ptr<ExtensionBox_Impl> m_xExtensionBox;
+    std::unique_ptr<weld::CustomWeld> m_xExtensionBoxWnd;
+    std::unique_ptr<weld::Label> m_xUpdateNeeded;
+    std::unique_ptr<weld::Button> m_xUpdateBtn;
+    std::unique_ptr<weld::Button> m_xCloseBtn;
+    std::unique_ptr<weld::Button> m_xCancelBtn;
+    std::unique_ptr<weld::Label> m_xProgressText;
+    std::unique_ptr<weld::ProgressBar> m_xProgressBar;
+
+    DECL_LINK( HandleUpdateBtn, weld::Button&, void );
+    DECL_LINK( HandleCloseBtn, weld::Button&, void );
+    DECL_LINK( HandleCancelBtn, weld::Button&, void );
+    DECL_LINK( TimeOutHdl, Timer *, void );
+    DECL_LINK( startProgress, void *, void );
+
+    static bool     isEnabled( const css::uno::Reference< css::deployment::XPackage > &xPackage );
+    static bool     checkDependencies( const css::uno::Reference< css::deployment::XPackage > &xPackage );
+    bool            hasActiveEntries();
+    void            disableAllEntries();
+
+public:
+    UpdateRequiredDialog(weld::Window * pParent, TheExtensionManager *pManager);
+    virtual        ~UpdateRequiredDialog() override;
+
+    virtual short   run() override;
+
+    virtual void    showProgress( bool bStart ) override;
+    virtual void    updateProgress( const OUString &rText,
+                                    const css::uno::Reference< css::task::XAbortChannel > &xAbortChannel) override;
+    virtual void    updateProgress( const tools::Long nProgress ) override;
+
+    virtual void    updatePackageInfo( const css::uno::Reference< css::deployment::XPackage > &xPackage ) override;
+
+    virtual void    addPackageToList( const css::uno::Reference< css::deployment::XPackage > &,
+                                      bool bLicenseMissing = false ) override;
+
+    virtual void    prepareChecking() override;
+    virtual void    checkEntries() override;
+};
+
+
+class ShowLicenseDialog : public weld::GenericDialogController
+{
+    std::unique_ptr<weld::TextView> m_xLicenseText;
+public:
+    ShowLicenseDialog(weld::Window * pParent, const css::uno::Reference< css::deployment::XPackage > &xPackage);
+    virtual ~ShowLicenseDialog() override;
+};
+
+class UpdateRequiredDialogService : public ::cppu::WeakImplHelper< css::ui::dialogs::XExecutableDialog, css::lang::XServiceInfo >
+{
+    css::uno::Reference< css::uno::XComponentContext > const m_xComponentContext;
+public:
+    UpdateRequiredDialogService( css::uno::Sequence< css::uno::Any > const & args,
+                                 css::uno::Reference< css::uno::XComponentContext> xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XExecutableDialog
+    virtual void SAL_CALL         setTitle( OUString const & title ) override;
+    virtual sal_Int16 SAL_CALL    execute() override;
+};
+
+} // namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.cxx b/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.cxx
new file mode 100644
index 000000000..fd70b7982
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.cxx
@@ -0,0 +1,1115 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/beans/NamedValue.hpp>
+
+#include <com/sun/star/deployment/DependencyException.hpp>
+#include <com/sun/star/deployment/LicenseException.hpp>
+#include <com/sun/star/deployment/VersionException.hpp>
+#include <com/sun/star/deployment/InstallException.hpp>
+#include <com/sun/star/deployment/PlatformException.hpp>
+
+#include <com/sun/star/deployment/ui/LicenseDialog.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+
+#include <com/sun/star/task/InteractionHandler.hpp>
+#include <com/sun/star/task/XAbortChannel.hpp>
+#include <com/sun/star/task/XInteractionAbort.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+
+#include <com/sun/star/ui/dialogs/ExecutableDialogResults.hpp>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/TypeClass.hpp>
+#include <o3tl/any.hxx>
+#include <osl/diagnose.h>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <salhelper/thread.hxx>
+#include <ucbhelper/content.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/anytostring.hxx>
+#include <utility>
+#include <vcl/svapp.hxx>
+#include <vcl/weld.hxx>
+
+#include "dp_gui_extensioncmdqueue.hxx"
+#include "dp_gui_dependencydialog.hxx"
+#include "dp_gui_dialog2.hxx"
+#include <dp_shared.hxx>
+#include <strings.hrc>
+#include "dp_gui_theextmgr.hxx"
+#include "dp_gui_updatedialog.hxx"
+#include "dp_gui_updateinstalldialog.hxx"
+#include <dp_dependencies.hxx>
+#include <dp_misc.h>
+#include <dp_identifier.hxx>
+#include <dp_version.hxx>
+
+#include <condition_variable>
+#include <queue>
+#include <memory>
+#include <mutex>
+
+#ifdef _WIN32
+#include <o3tl/safeCoInitUninit.hxx>
+#endif
+
+
+using namespace ::com::sun::star;
+
+namespace {
+
+OUString getVersion( OUString const & sVersion )
+{
+    return ( sVersion.isEmpty() ) ? OUString( "0" ) : sVersion;
+}
+
+OUString getVersion( const uno::Reference< deployment::XPackage > &rPackage )
+{
+    return getVersion( rPackage->getVersion());
+}
+}
+
+
+namespace dp_gui {
+
+namespace {
+
+class ProgressCmdEnv
+    : public ::cppu::WeakImplHelper< ucb::XCommandEnvironment,
+                                      task::XInteractionHandler,
+                                      ucb::XProgressHandler >
+{
+    uno::Reference< task::XInteractionHandler2> m_xHandler;
+    uno::Reference< uno::XComponentContext > m_xContext;
+
+    DialogHelper*   m_pDialogHelper;
+    OUString        m_sTitle;
+    bool            m_bWarnUser;
+    sal_Int32       m_nCurrentProgress;
+
+    void updateProgress();
+
+    /// @throws uno::RuntimeException
+    void update_( uno::Any const & Status );
+
+public:
+    /** When param bAskWhenInstalling = true, then the user is asked if he
+    agrees to install this extension. In case this extension is already installed
+    then the user is also notified and asked if he wants to replace that existing
+    extension. In first case an interaction request with an InstallException
+    will be handled and in the second case a VersionException will be handled.
+    */
+
+    ProgressCmdEnv( uno::Reference< uno::XComponentContext > xContext,
+                    DialogHelper* pDialogHelper,
+                    OUString aTitle )
+        : m_xContext(std::move( xContext ))
+        , m_pDialogHelper( pDialogHelper )
+        , m_sTitle(std::move( aTitle ))
+        , m_bWarnUser( false )
+        , m_nCurrentProgress(0)
+        {}
+
+    weld::Window* activeDialog() { return m_pDialogHelper ? m_pDialogHelper->getFrameWeld() : nullptr; }
+
+    void startProgress();
+    void stopProgress();
+    void progressSection( const OUString &rText,
+                          const uno::Reference< task::XAbortChannel > &xAbortChannel );
+    void setWarnUser( bool bNewVal ) { m_bWarnUser = bNewVal; }
+
+    // XCommandEnvironment
+    virtual uno::Reference< task::XInteractionHandler > SAL_CALL getInteractionHandler() override;
+    virtual uno::Reference< ucb::XProgressHandler > SAL_CALL getProgressHandler() override;
+
+    // XInteractionHandler
+    virtual void SAL_CALL handle( uno::Reference< task::XInteractionRequest > const & xRequest ) override;
+
+    // XProgressHandler
+    virtual void SAL_CALL push( uno::Any const & Status ) override;
+    virtual void SAL_CALL update( uno::Any const & Status ) override;
+    virtual void SAL_CALL pop() override;
+};
+
+
+struct ExtensionCmd
+{
+    enum E_CMD_TYPE { ADD, ENABLE, DISABLE, REMOVE, CHECK_FOR_UPDATES, ACCEPT_LICENSE };
+
+    E_CMD_TYPE  m_eCmdType;
+    bool        m_bWarnUser;
+    OUString    m_sExtensionURL;
+    OUString    m_sRepository;
+    uno::Reference< deployment::XPackage > m_xPackage;
+    std::vector< uno::Reference< deployment::XPackage > >        m_vExtensionList;
+
+    ExtensionCmd( const E_CMD_TYPE eCommand,
+                  OUString aExtensionURL,
+                  OUString aRepository,
+                  const bool bWarnUser )
+        : m_eCmdType( eCommand ),
+          m_bWarnUser( bWarnUser ),
+          m_sExtensionURL(std::move( aExtensionURL )),
+          m_sRepository(std::move( aRepository )) {};
+    ExtensionCmd( const E_CMD_TYPE eCommand,
+                  uno::Reference< deployment::XPackage > xPackage )
+        : m_eCmdType( eCommand ),
+          m_bWarnUser( false ),
+          m_xPackage(std::move( xPackage )) {};
+    ExtensionCmd( const E_CMD_TYPE eCommand,
+                std::vector<uno::Reference<deployment::XPackage > >&&vExtensionList )
+        : m_eCmdType( eCommand ),
+          m_bWarnUser( false ),
+          m_vExtensionList( std::move(vExtensionList) ) {};
+};
+
+}
+
+typedef std::shared_ptr< ExtensionCmd > TExtensionCmd;
+
+
+class ExtensionCmdQueue::Thread: public salhelper::Thread
+{
+public:
+    Thread( DialogHelper *pDialogHelper,
+            TheExtensionManager *pManager,
+            uno::Reference< uno::XComponentContext > xContext );
+
+    void addExtension( const OUString &rExtensionURL,
+                       const OUString &rRepository,
+                       const bool bWarnUser );
+    void removeExtension( const uno::Reference< deployment::XPackage > &rPackage );
+    void enableExtension( const uno::Reference< deployment::XPackage > &rPackage,
+                          const bool bEnable );
+    void checkForUpdates( std::vector<uno::Reference<deployment::XPackage > > && vExtensionList );
+    void acceptLicense( const uno::Reference< deployment::XPackage > &rPackage );
+    void stop();
+    bool isBusy();
+
+private:
+    virtual ~Thread() override;
+
+    virtual void execute() override;
+
+    void _insert(const TExtensionCmd& rExtCmd);
+
+    void _addExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                        const OUString &rPackageURL,
+                        const OUString &rRepository,
+                        const bool bWarnUser );
+    void _removeExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                           const uno::Reference< deployment::XPackage > &xPackage );
+    void _enableExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                           const uno::Reference< deployment::XPackage > &xPackage );
+    void _disableExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                            const uno::Reference< deployment::XPackage > &xPackage );
+    void _checkForUpdates( std::vector<uno::Reference<deployment::XPackage > > &&vExtensionList );
+    void _acceptLicense( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                           const uno::Reference< deployment::XPackage > &xPackage );
+
+    enum Input { NONE, START, STOP };
+
+    uno::Reference< uno::XComponentContext > m_xContext;
+    std::queue< TExtensionCmd >              m_queue;
+
+    DialogHelper *m_pDialogHelper;
+    TheExtensionManager *m_pManager;
+
+    const OUString   m_sEnablingPackages;
+    const OUString   m_sDisablingPackages;
+    const OUString   m_sAddingPackages;
+    const OUString   m_sRemovingPackages;
+    const OUString   m_sDefaultCmd;
+    const OUString   m_sAcceptLicense;
+    std::condition_variable m_wakeup;
+    std::mutex       m_mutex;
+    Input            m_eInput;
+    bool             m_bStopped;
+    bool             m_bWorking;
+};
+
+
+void ProgressCmdEnv::startProgress()
+{
+    m_nCurrentProgress = 0;
+
+    if ( m_pDialogHelper )
+        m_pDialogHelper->showProgress( true );
+}
+
+
+void ProgressCmdEnv::stopProgress()
+{
+    if ( m_pDialogHelper )
+        m_pDialogHelper->showProgress( false );
+}
+
+
+void ProgressCmdEnv::progressSection( const OUString &rText,
+                                      const uno::Reference< task::XAbortChannel > &xAbortChannel )
+{
+    m_nCurrentProgress = 0;
+    if ( m_pDialogHelper )
+    {
+        m_pDialogHelper->updateProgress( rText, xAbortChannel );
+        m_pDialogHelper->updateProgress( 5 );
+    }
+}
+
+
+void ProgressCmdEnv::updateProgress()
+{
+    tools::Long nProgress = ((m_nCurrentProgress*5) % 100) + 5;
+    if ( m_pDialogHelper )
+        m_pDialogHelper->updateProgress( nProgress );
+}
+
+// XCommandEnvironment
+
+uno::Reference< task::XInteractionHandler > ProgressCmdEnv::getInteractionHandler()
+{
+    return this;
+}
+
+
+uno::Reference< ucb::XProgressHandler > ProgressCmdEnv::getProgressHandler()
+{
+    return this;
+}
+
+
+// XInteractionHandler
+
+void ProgressCmdEnv::handle( uno::Reference< task::XInteractionRequest > const & xRequest )
+{
+    uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == uno::TypeClass_EXCEPTION );
+    dp_misc::TRACE( "[dp_gui_cmdenv.cxx] incoming request:\n"
+        + ::comphelper::anyToString(request) + "\n");
+
+    lang::WrappedTargetException wtExc;
+    deployment::DependencyException depExc;
+    deployment::LicenseException licExc;
+    deployment::VersionException verExc;
+    deployment::InstallException instExc;
+    deployment::PlatformException platExc;
+
+    // selections:
+    bool approve = false;
+    bool abort = false;
+
+    if (request >>= wtExc) {
+        // handable deployment error signalled, e.g.
+        // bundle item registration failed, notify cause only:
+        uno::Any cause;
+        deployment::DeploymentException dpExc;
+        if (wtExc.TargetException >>= dpExc)
+            cause = dpExc.Cause;
+        else {
+            ucb::CommandFailedException cfExc;
+            if (wtExc.TargetException >>= cfExc)
+                cause = cfExc.Reason;
+            else
+                cause = wtExc.TargetException;
+        }
+        update_( cause );
+
+        // ignore intermediate errors of legacy packages, i.e.
+        // former pkgchk behaviour:
+        const uno::Reference< deployment::XPackage > xPackage( wtExc.Context, uno::UNO_QUERY );
+        OSL_ASSERT( xPackage.is() );
+        if ( xPackage.is() )
+        {
+            const uno::Reference< deployment::XPackageTypeInfo > xPackageType( xPackage->getPackageType() );
+            OSL_ASSERT( xPackageType.is() );
+            if (xPackageType.is())
+            {
+                approve = ( xPackage->isBundle() &&
+                            xPackageType->getMediaType().match(
+                               "application/vnd.sun.star.legacy-package-bundle" ));
+            }
+        }
+        abort = !approve;
+    }
+    else if (request >>= depExc)
+    {
+        std::vector< OUString > deps;
+        deps.reserve(depExc.UnsatisfiedDependencies.getLength());
+        for (auto const & i : std::as_const(depExc.UnsatisfiedDependencies))
+        {
+            deps.push_back( dp_misc::Dependencies::getErrorText(i) );
+        }
+        {
+            SolarMutexGuard guard;
+            if (m_pDialogHelper)
+                m_pDialogHelper->incBusy();
+            DependencyDialog aDlg(activeDialog(), deps);
+            short n = aDlg.run();
+            if (m_pDialogHelper)
+                m_pDialogHelper->decBusy();
+            // Distinguish between closing the dialog and programmatically
+            // canceling the dialog (headless VCL):
+            approve = n == RET_OK
+                || (n == RET_CANCEL && !Application::IsDialogCancelEnabled());
+        }
+    }
+    else if (request >>= licExc)
+    {
+        SolarMutexGuard guard;
+
+        weld::Window *pTopLevel = activeDialog();
+        if (m_pDialogHelper)
+            m_pDialogHelper->incBusy();
+        uno::Reference< ui::dialogs::XExecutableDialog > xDialog(
+            deployment::ui::LicenseDialog::create(
+            m_xContext, pTopLevel ? pTopLevel->GetXWindow() : nullptr,
+            licExc.ExtensionName, licExc.Text ) );
+        sal_Int16 res = xDialog->execute();
+        if (m_pDialogHelper)
+            m_pDialogHelper->decBusy();
+        if ( res == ui::dialogs::ExecutableDialogResults::CANCEL )
+            abort = true;
+        else if ( res == ui::dialogs::ExecutableDialogResults::OK )
+            approve = true;
+        else
+        {
+            OSL_ASSERT(false);
+        }
+    }
+    else if (request >>= verExc)
+    {
+        TranslateId id;
+        switch (dp_misc::compareVersions(
+                    verExc.NewVersion, verExc.Deployed->getVersion() ))
+        {
+        case dp_misc::LESS:
+            id = RID_STR_WARNING_VERSION_LESS;
+            break;
+        case dp_misc::EQUAL:
+            id = RID_STR_WARNING_VERSION_EQUAL;
+            break;
+        default: // dp_misc::GREATER
+            id = RID_STR_WARNING_VERSION_GREATER;
+            break;
+        }
+        OSL_ASSERT( verExc.Deployed.is() );
+        bool bEqualNames = verExc.NewDisplayName ==
+            verExc.Deployed->getDisplayName();
+        {
+            SolarMutexGuard guard;
+
+            if (m_pDialogHelper)
+                m_pDialogHelper->incBusy();
+
+            std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(activeDialog(),
+                                                      VclMessageType::Warning, VclButtonsType::OkCancel, DpResId(id)));
+            OUString s;
+            if (bEqualNames)
+            {
+                s = xBox->get_primary_text();
+            }
+            else if (id != RID_STR_WARNING_VERSION_EQUAL)
+            {
+                //hypothetical: requires two instances of an extension with the same
+                //version to have different display names. Probably the developer forgot
+                //to change the version.
+                s = DpResId(RID_STR_WARNINGBOX_VERSION_EQUAL_DIFFERENT_NAMES);
+            }
+            else if (id != RID_STR_WARNING_VERSION_LESS)
+            {
+                s = DpResId(RID_STR_WARNINGBOX_VERSION_LESS_DIFFERENT_NAMES);
+            }
+            else if (id != RID_STR_WARNING_VERSION_GREATER)
+            {
+               s = DpResId(RID_STR_WARNINGBOX_VERSION_GREATER_DIFFERENT_NAMES);
+            }
+            s = s.replaceAll("$NAME", verExc.NewDisplayName);
+            s = s.replaceAll("$OLDNAME", verExc.Deployed->getDisplayName());
+            s = s.replaceAll("$NEW", getVersion(verExc.NewVersion));
+            s = s.replaceAll("$DEPLOYED", getVersion(verExc.Deployed));
+            xBox->set_primary_text(s);
+            approve = xBox->run() == RET_OK;
+            if (m_pDialogHelper)
+                m_pDialogHelper->decBusy();
+            abort = !approve;
+        }
+    }
+    else if (request >>= instExc)
+    {
+        if ( ! m_bWarnUser )
+        {
+            approve = true;
+        }
+        else
+        {
+            if ( m_pDialogHelper )
+            {
+                SolarMutexGuard guard;
+
+                approve = m_pDialogHelper->installExtensionWarn( instExc.displayName );
+            }
+            else
+                approve = false;
+            abort = !approve;
+        }
+    }
+    else if (request >>= platExc)
+    {
+        SolarMutexGuard guard;
+        OUString sMsg(DpResId(RID_STR_UNSUPPORTED_PLATFORM));
+        sMsg = sMsg.replaceAll("%Name", platExc.package->getDisplayName());
+        if (m_pDialogHelper)
+            m_pDialogHelper->incBusy();
+        std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(activeDialog(),
+                                                  VclMessageType::Warning, VclButtonsType::Ok, sMsg));
+        xBox->run();
+        if (m_pDialogHelper)
+            m_pDialogHelper->decBusy();
+        approve = true;
+    }
+
+    if (!approve && !abort)
+    {
+        // forward to UUI handler:
+        if (! m_xHandler.is()) {
+            // late init:
+            m_xHandler = task::InteractionHandler::createWithParentAndContext(m_xContext, nullptr, m_sTitle);
+        }
+        m_xHandler->handle( xRequest );
+    }
+    else
+    {
+        // select:
+        uno::Sequence< uno::Reference< task::XInteractionContinuation > > conts(
+            xRequest->getContinuations() );
+        uno::Reference< task::XInteractionContinuation > const * pConts = conts.getConstArray();
+        sal_Int32 len = conts.getLength();
+        for ( sal_Int32 pos = 0; pos < len; ++pos )
+        {
+            if (approve) {
+                uno::Reference< task::XInteractionApprove > xInteractionApprove( pConts[ pos ], uno::UNO_QUERY );
+                if (xInteractionApprove.is()) {
+                    xInteractionApprove->select();
+                    // don't query again for ongoing continuations:
+                    approve = false;
+                }
+            }
+            else if (abort) {
+                uno::Reference< task::XInteractionAbort > xInteractionAbort( pConts[ pos ], uno::UNO_QUERY );
+                if (xInteractionAbort.is()) {
+                    xInteractionAbort->select();
+                    // don't query again for ongoing continuations:
+                    abort = false;
+                }
+            }
+        }
+    }
+}
+
+
+// XProgressHandler
+
+void ProgressCmdEnv::push( uno::Any const & rStatus )
+{
+    update_( rStatus );
+}
+
+
+void ProgressCmdEnv::update_( uno::Any const & rStatus )
+{
+    OUString text;
+    if ( rStatus.hasValue() && !( rStatus >>= text) )
+    {
+        if ( auto e = o3tl::tryAccess<uno::Exception>(rStatus) )
+            text = e->Message;
+        if ( text.isEmpty() )
+            text = ::comphelper::anyToString( rStatus ); // fallback
+
+        const SolarMutexGuard aGuard;
+        if (m_pDialogHelper)
+            m_pDialogHelper->incBusy();
+        std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(activeDialog(),
+                                                  VclMessageType::Warning, VclButtonsType::Ok, text));
+        xBox->run();
+        if (m_pDialogHelper)
+            m_pDialogHelper->decBusy();
+    }
+    ++m_nCurrentProgress;
+    updateProgress();
+}
+
+
+void ProgressCmdEnv::update( uno::Any const & rStatus )
+{
+    update_( rStatus );
+}
+
+
+void ProgressCmdEnv::pop()
+{
+    update_( uno::Any() ); // no message
+}
+
+
+ExtensionCmdQueue::Thread::Thread( DialogHelper *pDialogHelper,
+                                   TheExtensionManager *pManager,
+                                   uno::Reference< uno::XComponentContext > xContext ) :
+    salhelper::Thread( "dp_gui_extensioncmdqueue" ),
+    m_xContext(std::move( xContext )),
+    m_pDialogHelper( pDialogHelper ),
+    m_pManager( pManager ),
+    m_sEnablingPackages( DpResId( RID_STR_ENABLING_PACKAGES ) ),
+    m_sDisablingPackages( DpResId( RID_STR_DISABLING_PACKAGES ) ),
+    m_sAddingPackages( DpResId( RID_STR_ADDING_PACKAGES ) ),
+    m_sRemovingPackages( DpResId( RID_STR_REMOVING_PACKAGES ) ),
+    m_sDefaultCmd( DpResId( RID_STR_ADD_PACKAGES ) ),
+    m_sAcceptLicense( DpResId( RID_STR_ACCEPT_LICENSE ) ),
+    m_eInput( NONE ),
+    m_bStopped( false ),
+    m_bWorking( false )
+{
+    OSL_ASSERT( pDialogHelper );
+}
+
+
+void ExtensionCmdQueue::Thread::addExtension( const OUString &rExtensionURL,
+                                              const OUString &rRepository,
+                                              const bool bWarnUser )
+{
+    if ( !rExtensionURL.isEmpty() )
+    {
+        TExtensionCmd pEntry = std::make_shared<ExtensionCmd>( ExtensionCmd::ADD, rExtensionURL, rRepository, bWarnUser );
+        _insert( pEntry );
+    }
+}
+
+
+void ExtensionCmdQueue::Thread::removeExtension( const uno::Reference< deployment::XPackage > &rPackage )
+{
+    if ( rPackage.is() )
+    {
+        TExtensionCmd pEntry = std::make_shared<ExtensionCmd>( ExtensionCmd::REMOVE, rPackage );
+        _insert( pEntry );
+    }
+}
+
+
+void ExtensionCmdQueue::Thread::acceptLicense( const uno::Reference< deployment::XPackage > &rPackage )
+{
+    if ( rPackage.is() )
+    {
+        TExtensionCmd pEntry = std::make_shared<ExtensionCmd>( ExtensionCmd::ACCEPT_LICENSE, rPackage );
+        _insert( pEntry );
+    }
+}
+
+
+void ExtensionCmdQueue::Thread::enableExtension( const uno::Reference< deployment::XPackage > &rPackage,
+                                                 const bool bEnable )
+{
+    if ( rPackage.is() )
+    {
+        TExtensionCmd pEntry = std::make_shared<ExtensionCmd>( bEnable ? ExtensionCmd::ENABLE :
+                                                          ExtensionCmd::DISABLE,
+                                                rPackage );
+        _insert( pEntry );
+    }
+}
+
+
+void ExtensionCmdQueue::Thread::checkForUpdates(
+    std::vector<uno::Reference<deployment::XPackage > > && vExtensionList )
+{
+    TExtensionCmd pEntry = std::make_shared<ExtensionCmd>( ExtensionCmd::CHECK_FOR_UPDATES, std::move(vExtensionList) );
+    _insert( pEntry );
+}
+
+
+//Stopping this thread will not abort the installation of extensions.
+void ExtensionCmdQueue::Thread::stop()
+{
+    std::scoped_lock aGuard( m_mutex );
+    m_bStopped = true;
+    m_eInput = STOP;
+    m_wakeup.notify_all();
+}
+
+
+bool ExtensionCmdQueue::Thread::isBusy()
+{
+    std::scoped_lock aGuard( m_mutex );
+    return m_bWorking;
+}
+
+
+ExtensionCmdQueue::Thread::~Thread() {}
+
+
+void ExtensionCmdQueue::Thread::execute()
+{
+#ifdef _WIN32
+    //Needed for use of the service "com.sun.star.system.SystemShellExecute" in
+    //DialogHelper::openWebBrowser
+    int nNbCallCoInitializeExForReinit = 0;
+    o3tl::safeCoInitializeEx(COINIT_APARTMENTTHREADED, nNbCallCoInitializeExForReinit);
+#endif
+    for (;;)
+    {
+        int nSize;
+        Input eInput;
+        {
+            std::unique_lock aGuard( m_mutex );
+            while (m_eInput == NONE) {
+                m_wakeup.wait(aGuard);
+            }
+            eInput = m_eInput;
+            m_eInput = NONE;
+            nSize = m_queue.size();
+            // coverity[missing_lock: FALSE] - maybe due to (by-design) unique_lock vs. scoped_lock?
+            m_bWorking = false;
+        }
+
+        if ( eInput == STOP )
+            break;
+
+        // We only install the extension which are currently in the queue.
+        // The progressbar will be set to show the progress of the current number
+        // of extensions. If we allowed to add extensions now then the progressbar may
+        // have reached the end while we still install newly added extensions.
+        if ( nSize == 0 )
+            continue;
+
+        ::rtl::Reference< ProgressCmdEnv > currentCmdEnv( new ProgressCmdEnv( m_xContext, m_pDialogHelper, m_sDefaultCmd ) );
+
+        // Do not lock the following part with addExtension. addExtension may be called in the main thread.
+        // If the message box "Do you want to install the extension (or similar)" is shown and then
+        // addExtension is called, which then blocks the main thread, then we deadlock.
+        bool bStartProgress = true;
+
+        while ( --nSize >= 0 )
+        {
+            {
+                std::scoped_lock aGuard( m_mutex );
+                m_bWorking = true;
+            }
+
+            try
+            {
+                TExtensionCmd pEntry;
+                {
+                    std::scoped_lock queueGuard( m_mutex );
+                    pEntry = m_queue.front();
+                    m_queue.pop();
+                }
+
+                if ( bStartProgress && ( pEntry->m_eCmdType != ExtensionCmd::CHECK_FOR_UPDATES ) )
+                {
+                    currentCmdEnv->startProgress();
+                    bStartProgress = false;
+                }
+
+                switch ( pEntry->m_eCmdType ) {
+                case ExtensionCmd::ADD :
+                    _addExtension( currentCmdEnv, pEntry->m_sExtensionURL, pEntry->m_sRepository, pEntry->m_bWarnUser );
+                    break;
+                case ExtensionCmd::REMOVE :
+                    _removeExtension( currentCmdEnv, pEntry->m_xPackage );
+                    break;
+                case ExtensionCmd::ENABLE :
+                    _enableExtension( currentCmdEnv, pEntry->m_xPackage );
+                    break;
+                case ExtensionCmd::DISABLE :
+                    _disableExtension( currentCmdEnv, pEntry->m_xPackage );
+                    break;
+                case ExtensionCmd::CHECK_FOR_UPDATES :
+                    _checkForUpdates( std::vector(pEntry->m_vExtensionList) );
+                    break;
+                case ExtensionCmd::ACCEPT_LICENSE :
+                    _acceptLicense( currentCmdEnv, pEntry->m_xPackage );
+                    break;
+                }
+            }
+            catch ( const ucb::CommandAbortedException & )
+            {
+                //This exception is thrown when the user clicks cancel on the progressbar.
+                //Then we cancel the installation of all extensions and remove them from
+                //the queue.
+                {
+                    std::scoped_lock queueGuard2(m_mutex);
+                    while ( --nSize >= 0 )
+                        m_queue.pop();
+                }
+                break;
+            }
+            catch ( const ucb::CommandFailedException & )
+            {
+                //This exception is thrown when a user clicked cancel in the messagebox which was
+                //started by the interaction handler. For example the user will be asked if he/she
+                //really wants to install the extension.
+                //These interactions run for exactly one extension at a time. Therefore we continue
+                //with installing the remaining extensions.
+                continue;
+            }
+            catch ( const uno::Exception & )
+            {
+                //Todo display the user an error
+                //see also DialogImpl::SyncPushButton::Click()
+                uno::Any exc( ::cppu::getCaughtException() );
+                OUString msg;
+                deployment::DeploymentException dpExc;
+                if (exc >>= dpExc)
+                {
+                    if (auto e = o3tl::tryAccess<uno::Exception>(dpExc.Cause))
+                    {
+                        // notify error cause only:
+                        msg = e->Message;
+                    }
+                }
+                if (msg.isEmpty()) // fallback for debugging purposes
+                    msg = ::comphelper::anyToString(exc);
+
+                const SolarMutexGuard guard;
+                if (m_pDialogHelper)
+                    m_pDialogHelper->incBusy();
+
+                std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(currentCmdEnv->activeDialog(),
+                                                          VclMessageType::Warning, VclButtonsType::Ok, msg));
+                if (m_pDialogHelper)
+                    xBox->set_title(m_pDialogHelper->getFrameWeld()->get_title());
+                xBox->run();
+                if (m_pDialogHelper)
+                    m_pDialogHelper->decBusy();
+                //Continue with installation of the remaining extensions
+            }
+            {
+                std::scoped_lock aGuard( m_mutex );
+                m_bWorking = false;
+            }
+        }
+
+        {
+            // when leaving the while loop with break, we should set working to false, too
+            std::scoped_lock aGuard( m_mutex );
+            m_bWorking = false;
+        }
+
+        if ( !bStartProgress )
+            currentCmdEnv->stopProgress();
+    }
+    //end for
+#ifdef _WIN32
+    o3tl::safeCoUninitializeReinit(COINIT_MULTITHREADED, nNbCallCoInitializeExForReinit);
+#endif
+}
+
+
+void ExtensionCmdQueue::Thread::_addExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                                               const OUString &rPackageURL,
+                                               const OUString &rRepository,
+                                               const bool bWarnUser )
+{
+    //check if we have a string in anyTitle. For example "unopkg gui \" caused anyTitle to be void
+    //and anyTitle.get<OUString> throws as RuntimeException.
+    uno::Any anyTitle;
+    try
+    {
+        anyTitle = ::ucbhelper::Content( rPackageURL, rCmdEnv, m_xContext ).getPropertyValue( "Title" );
+    }
+    catch ( const uno::Exception & )
+    {
+        return;
+    }
+
+    OUString sName;
+    if ( ! (anyTitle >>= sName) )
+    {
+        OSL_FAIL("Could not get file name for extension.");
+        return;
+    }
+
+    rCmdEnv->setWarnUser( bWarnUser );
+    uno::Reference< deployment::XExtensionManager > xExtMgr = m_pManager->getExtensionManager();
+    uno::Reference< task::XAbortChannel > xAbortChannel( xExtMgr->createAbortChannel() );
+    OUString sTitle(
+        m_sAddingPackages.replaceAll("%EXTENSION_NAME", sName));
+    rCmdEnv->progressSection( sTitle, xAbortChannel );
+
+    try
+    {
+        xExtMgr->addExtension(rPackageURL, uno::Sequence<beans::NamedValue>(),
+                              rRepository, xAbortChannel, rCmdEnv );
+    }
+    catch ( const ucb::CommandFailedException & )
+    {
+        // When the extension is already installed we'll get a dialog asking if we want to overwrite. If we then press
+        // cancel this exception is thrown.
+    }
+    catch ( const ucb::CommandAbortedException & )
+    {
+        // User clicked the cancel button
+        // TODO: handle cancel
+    }
+    rCmdEnv->setWarnUser( false );
+}
+
+
+void ExtensionCmdQueue::Thread::_removeExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                                                  const uno::Reference< deployment::XPackage > &xPackage )
+{
+    uno::Reference< deployment::XExtensionManager > xExtMgr = m_pManager->getExtensionManager();
+    uno::Reference< task::XAbortChannel > xAbortChannel( xExtMgr->createAbortChannel() );
+    OUString sTitle(
+        m_sRemovingPackages.replaceAll("%EXTENSION_NAME",
+            xPackage->getDisplayName()));
+    rCmdEnv->progressSection( sTitle, xAbortChannel );
+
+    OUString id( dp_misc::getIdentifier( xPackage ) );
+    try
+    {
+        xExtMgr->removeExtension( id, xPackage->getName(), xPackage->getRepositoryName(), xAbortChannel, rCmdEnv );
+    }
+    catch ( const deployment::DeploymentException & )
+    {}
+    catch ( const ucb::CommandFailedException & )
+    {}
+    catch ( const ucb::CommandAbortedException & )
+    {}
+
+    // Check, if there are still updates to be notified via menu bar icon
+    uno::Sequence< uno::Sequence< OUString > > aItemList;
+    UpdateDialog::createNotifyJob( false, aItemList );
+}
+
+
+void ExtensionCmdQueue::Thread::_checkForUpdates(
+    std::vector<uno::Reference<deployment::XPackage > > && vExtensionList )
+{
+    const SolarMutexGuard guard;
+
+    if (m_pDialogHelper)
+        m_pDialogHelper->incBusy();
+
+    std::vector< UpdateData > vData;
+    UpdateDialog aUpdateDialog(m_xContext, m_pDialogHelper ? m_pDialogHelper->getFrameWeld() : nullptr, std::move(vExtensionList), &vData);
+
+    aUpdateDialog.notifyMenubar( true, false ); // prepare the checking, if there updates to be notified via menu bar icon
+
+    bool bOk = aUpdateDialog.run() == RET_OK;
+    if (m_pDialogHelper)
+        m_pDialogHelper->decBusy();
+
+    if (bOk && !vData.empty())
+    {
+        // If there is at least one directly downloadable extension then we
+        // open the install dialog.
+        std::vector< UpdateData > dataDownload;
+
+        for (auto const& data : vData)
+        {
+            if ( data.sWebsiteURL.isEmpty() )
+                dataDownload.push_back(data);
+        }
+
+        short nDialogResult = RET_OK;
+        if ( !dataDownload.empty() )
+        {
+            if (m_pDialogHelper)
+                m_pDialogHelper->incBusy();
+            UpdateInstallDialog aDlg(m_pDialogHelper ? m_pDialogHelper->getFrameWeld() : nullptr, dataDownload, m_xContext);
+            nDialogResult = aDlg.run();
+            if (m_pDialogHelper)
+                m_pDialogHelper->decBusy();
+            aUpdateDialog.notifyMenubar( false, true ); // Check, if there are still pending updates to be notified via menu bar icon
+        }
+        else
+            aUpdateDialog.notifyMenubar( false, false ); // Check, if there are pending updates to be notified via menu bar icon
+
+        //Now start the webbrowser and navigate to the websites where we get the updates
+        if ( RET_OK == nDialogResult )
+        {
+            for (auto const& data : vData)
+            {
+                if ( m_pDialogHelper && ( !data.sWebsiteURL.isEmpty() ) )
+                    m_pDialogHelper->openWebBrowser( data.sWebsiteURL, m_pDialogHelper->getFrameWeld()->get_title() );
+            }
+        }
+    }
+    else
+        aUpdateDialog.notifyMenubar( false, false ); // check if there updates to be notified via menu bar icon
+}
+
+
+void ExtensionCmdQueue::Thread::_enableExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                                                  const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return;
+
+    uno::Reference< deployment::XExtensionManager > xExtMgr = m_pManager->getExtensionManager();
+    uno::Reference< task::XAbortChannel > xAbortChannel( xExtMgr->createAbortChannel() );
+    OUString sTitle(
+        m_sEnablingPackages.replaceAll("%EXTENSION_NAME",
+            xPackage->getDisplayName()));
+    rCmdEnv->progressSection( sTitle, xAbortChannel );
+
+    try
+    {
+        xExtMgr->enableExtension( xPackage, xAbortChannel, rCmdEnv );
+        if ( m_pDialogHelper )
+            m_pDialogHelper->updatePackageInfo( xPackage );
+    }
+    catch ( const ::ucb::CommandAbortedException & )
+    {}
+}
+
+
+void ExtensionCmdQueue::Thread::_disableExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                                                   const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return;
+
+    uno::Reference< deployment::XExtensionManager > xExtMgr = m_pManager->getExtensionManager();
+    uno::Reference< task::XAbortChannel > xAbortChannel( xExtMgr->createAbortChannel() );
+    OUString sTitle(
+        m_sDisablingPackages.replaceAll("%EXTENSION_NAME",
+            xPackage->getDisplayName()));
+    rCmdEnv->progressSection( sTitle, xAbortChannel );
+
+    try
+    {
+        xExtMgr->disableExtension( xPackage, xAbortChannel, rCmdEnv );
+        if ( m_pDialogHelper )
+            m_pDialogHelper->updatePackageInfo( xPackage );
+    }
+    catch ( const ::ucb::CommandAbortedException & )
+    {}
+}
+
+
+void ExtensionCmdQueue::Thread::_acceptLicense( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                                                const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return;
+
+    uno::Reference< deployment::XExtensionManager > xExtMgr = m_pManager->getExtensionManager();
+    uno::Reference< task::XAbortChannel > xAbortChannel( xExtMgr->createAbortChannel() );
+    OUString sTitle(
+        m_sAcceptLicense.replaceAll("%EXTENSION_NAME",
+            xPackage->getDisplayName()));
+    rCmdEnv->progressSection( sTitle, xAbortChannel );
+
+    try
+    {
+        xExtMgr->checkPrerequisitesAndEnable( xPackage, xAbortChannel, rCmdEnv );
+        if ( m_pDialogHelper )
+            m_pDialogHelper->updatePackageInfo( xPackage );
+    }
+    catch ( const ::ucb::CommandAbortedException & )
+    {}
+}
+
+void ExtensionCmdQueue::Thread::_insert(const TExtensionCmd& rExtCmd)
+{
+    std::scoped_lock aGuard( m_mutex );
+
+    // If someone called stop then we do not process the command -> game over!
+    if ( m_bStopped )
+        return;
+
+    m_queue.push( rExtCmd );
+    m_eInput = START;
+    m_wakeup.notify_all();
+}
+
+
+ExtensionCmdQueue::ExtensionCmdQueue( DialogHelper * pDialogHelper,
+                                      TheExtensionManager *pManager,
+                                      const uno::Reference< uno::XComponentContext > &rContext )
+  : m_thread( new Thread( pDialogHelper, pManager, rContext ) )
+{
+    m_thread->launch();
+}
+
+ExtensionCmdQueue::~ExtensionCmdQueue() {
+    m_thread->stop();
+    m_thread->join();
+}
+
+void ExtensionCmdQueue::addExtension( const OUString & extensionURL,
+                                      const OUString & repository,
+                                      const bool bWarnUser )
+{
+    m_thread->addExtension( extensionURL, repository, bWarnUser );
+}
+
+void ExtensionCmdQueue::removeExtension( const uno::Reference< deployment::XPackage > &rPackage )
+{
+    m_thread->removeExtension( rPackage );
+}
+
+void ExtensionCmdQueue::enableExtension( const uno::Reference< deployment::XPackage > &rPackage,
+                                         const bool bEnable )
+{
+    m_thread->enableExtension( rPackage, bEnable );
+}
+
+void ExtensionCmdQueue::checkForUpdates( std::vector<uno::Reference<deployment::XPackage > > && vExtensionList )
+{
+    m_thread->checkForUpdates( std::move(vExtensionList) );
+}
+
+void ExtensionCmdQueue::acceptLicense( const uno::Reference< deployment::XPackage > &rPackage )
+{
+    m_thread->acceptLicense( rPackage );
+}
+
+void ExtensionCmdQueue::syncRepositories( const uno::Reference< uno::XComponentContext > &xContext )
+{
+    dp_misc::syncRepositories( false, new ProgressCmdEnv( xContext, nullptr, "Extension Manager" ) );
+}
+
+bool ExtensionCmdQueue::isBusy()
+{
+    return m_thread->isBusy();
+}
+
+void handleInteractionRequest( const uno::Reference< uno::XComponentContext > & xContext,
+                               const uno::Reference< task::XInteractionRequest > & xRequest )
+{
+    ::rtl::Reference< ProgressCmdEnv > xCmdEnv( new ProgressCmdEnv( xContext, nullptr, "Extension Manager" ) );
+    xCmdEnv->handle( xRequest );
+}
+
+} //namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.hxx b/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.hxx
new file mode 100644
index 000000000..3703d1e8c
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.hxx
@@ -0,0 +1,94 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <rtl/ref.hxx>
+
+#include <vector>
+
+#include "dp_gui_updatedata.hxx"
+
+/// @HTML
+
+namespace com::sun::star {
+    namespace task { class XInteractionRequest; }
+    namespace uno { class XComponentContext; }
+}
+
+namespace dp_gui {
+
+class DialogHelper;
+class TheExtensionManager;
+
+/**
+   Manages installing of extensions in the GUI mode. Requests for installing
+   Extensions can be asynchronous. For example, the Extension Manager is running
+   in an office process and someone uses the system integration to install an Extension.
+   That is, the user double clicks an extension symbol in a file browser, which then
+   causes an invocation of "unopkg gui ext". When at that time the Extension Manager
+   already performs a task, triggered by the user (for example, add, update, disable,
+   enable) then adding of the extension will be postponed until the user has finished
+   the task.
+
+   This class also ensures that the extensions are not installed in the main thread.
+   Doing so would cause a deadlock because of the progress bar which needs to be constantly
+   updated.
+*/
+class ExtensionCmdQueue {
+
+public:
+    /**
+       Create an instance.
+    */
+    ExtensionCmdQueue( DialogHelper * pDialogHelper,
+                       TheExtensionManager *pManager,
+                       const css::uno::Reference< css::uno::XComponentContext > & rContext);
+
+    ~ExtensionCmdQueue();
+
+    void addExtension( const OUString &rExtensionURL,
+                       const OUString &rRepository,
+                       const bool bWarnUser );
+    void removeExtension( const css::uno::Reference< css::deployment::XPackage > &rPackage );
+    void enableExtension( const css::uno::Reference< css::deployment::XPackage > &rPackage,
+                          const bool bEnable );
+    void checkForUpdates( std::vector< css::uno::Reference< css::deployment::XPackage > > && vList );
+    void acceptLicense( const css::uno::Reference< css::deployment::XPackage > &rPackage );
+    static void syncRepositories( const css::uno::Reference< css::uno::XComponentContext > & xContext );
+
+    bool isBusy();
+private:
+    ExtensionCmdQueue(ExtensionCmdQueue const &) = delete;
+    ExtensionCmdQueue& operator =(ExtensionCmdQueue const &) = delete;
+
+    class Thread;
+
+    rtl::Reference< Thread > m_thread;
+};
+
+void handleInteractionRequest( const css::uno::Reference< css::uno::XComponentContext > & xContext,
+                               const css::uno::Reference< css::task::XInteractionRequest > & xRequest );
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_extlistbox.cxx b/desktop/source/deployment/gui/dp_gui_extlistbox.cxx
new file mode 100644
index 000000000..d30d24f79
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_extlistbox.cxx
@@ -0,0 +1,1144 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <dp_shared.hxx>
+#include <strings.hrc>
+#include "dp_gui.h"
+#include "dp_gui_extlistbox.hxx"
+#include "dp_gui_theextmgr.hxx"
+#include <dp_dependencies.hxx>
+#include <bitmaps.hlst>
+
+#include <comphelper/processfactory.hxx>
+#include <com/sun/star/i18n/CollatorOptions.hpp>
+#include <com/sun/star/deployment/DependencyException.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionRemovedException.hpp>
+#include <com/sun/star/system/XSystemShellExecute.hpp>
+#include <com/sun/star/system/SystemShellExecuteFlags.hpp>
+#include <com/sun/star/system/SystemShellExecute.hpp>
+#include <cppuhelper/weakref.hxx>
+#include <i18nlangtag/languagetag.hxx>
+#include <o3tl/safeint.hxx>
+#include <osl/diagnose.h>
+#include <rtl/ustrbuf.hxx>
+#include <utility>
+#include <vcl/event.hxx>
+#include <vcl/ptrstyle.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/settings.hxx>
+#include <vcl/weldutils.hxx>
+#include <algorithm>
+
+constexpr OUStringLiteral USER_PACKAGE_MANAGER = u"user";
+constexpr OUStringLiteral SHARED_PACKAGE_MANAGER = u"shared";
+
+using namespace ::com::sun::star;
+
+namespace dp_gui {
+
+namespace {
+
+struct FindWeakRef
+{
+    const uno::Reference<deployment::XPackage> m_extension;
+
+    explicit FindWeakRef( uno::Reference<deployment::XPackage> ext): m_extension(std::move(ext)) {}
+    bool operator () (uno::WeakReference< deployment::XPackage >  const & ref);
+};
+
+bool FindWeakRef::operator () (uno::WeakReference< deployment::XPackage >  const & ref)
+{
+    const uno::Reference<deployment::XPackage> ext(ref);
+    return ext == m_extension;
+}
+
+} // end namespace
+
+//                          struct Entry_Impl
+
+Entry_Impl::Entry_Impl( const uno::Reference< deployment::XPackage > &xPackage,
+                        const PackageState eState, const bool bReadOnly ) :
+    m_bActive( false ),
+    m_bLocked( bReadOnly ),
+    m_bHasOptions( false ),
+    m_bUser( false ),
+    m_bShared( false ),
+    m_bNew( false ),
+    m_bChecked( false ),
+    m_bMissingDeps( false ),
+    m_bHasButtons( false ),
+    m_bMissingLic( false ),
+    m_eState( eState ),
+    m_xPackage( xPackage )
+{
+    try
+    {
+        m_sTitle = xPackage->getDisplayName();
+        m_sVersion = xPackage->getVersion();
+        m_sDescription = xPackage->getDescription();
+        m_sLicenseText = xPackage->getLicenseText();
+
+        beans::StringPair aInfo( m_xPackage->getPublisherInfo() );
+        m_sPublisher = aInfo.First;
+        m_sPublisherURL = aInfo.Second;
+
+        // get the icons for the package if there are any
+        uno::Reference< graphic::XGraphic > xGraphic = xPackage->getIcon( false );
+        if ( xGraphic.is() )
+            m_aIcon = Image( xGraphic );
+
+        if ( eState == AMBIGUOUS )
+            m_sErrorText = DpResId( RID_STR_ERROR_UNKNOWN_STATUS );
+        else if ( eState == NOT_REGISTERED )
+            checkDependencies();
+    }
+    catch (const deployment::ExtensionRemovedException &) {}
+    catch (const uno::RuntimeException &) {}
+}
+
+
+Entry_Impl::~Entry_Impl()
+{}
+
+
+sal_Int32 Entry_Impl::CompareTo( const CollatorWrapper *pCollator, const TEntry_Impl& rEntry ) const
+{
+    sal_Int32 eCompare = pCollator->compareString( m_sTitle, rEntry->m_sTitle );
+    if ( eCompare == 0 )
+    {
+        eCompare = m_sVersion.compareTo( rEntry->m_sVersion );
+        if ( eCompare == 0 )
+        {
+            sal_Int32 nCompare = m_xPackage->getRepositoryName().compareTo( rEntry->m_xPackage->getRepositoryName() );
+            if ( nCompare < 0 )
+                eCompare = -1;
+            else if ( nCompare > 0 )
+                eCompare = 1;
+        }
+    }
+    return eCompare;
+}
+
+
+void Entry_Impl::checkDependencies()
+{
+    try {
+        m_xPackage->checkDependencies( uno::Reference< ucb::XCommandEnvironment >() );
+    }
+    catch ( const deployment::DeploymentException &e )
+    {
+        deployment::DependencyException depExc;
+        if ( e.Cause >>= depExc )
+        {
+            OUStringBuffer aMissingDep( DpResId( RID_STR_ERROR_MISSING_DEPENDENCIES ) );
+            for ( const auto& i : std::as_const(depExc.UnsatisfiedDependencies) )
+            {
+                aMissingDep.append("\n");
+                aMissingDep.append(dp_misc::Dependencies::getErrorText(i));
+            }
+            aMissingDep.append("\n");
+            m_sErrorText = aMissingDep.makeStringAndClear();
+            m_bMissingDeps = true;
+        }
+    }
+}
+
+// ExtensionRemovedListener
+
+void ExtensionRemovedListener::disposing( lang::EventObject const & rEvt )
+{
+    uno::Reference< deployment::XPackage > xPackage( rEvt.Source, uno::UNO_QUERY );
+
+    if ( xPackage.is() )
+    {
+        m_pParent->removeEntry( xPackage );
+    }
+}
+
+
+ExtensionRemovedListener::~ExtensionRemovedListener()
+{
+}
+
+
+// ExtensionBox_Impl
+ExtensionBox_Impl::ExtensionBox_Impl(std::unique_ptr<weld::ScrolledWindow> xScroll)
+    : m_bHasScrollBar( false )
+    , m_bHasActive( false )
+    , m_bNeedsRecalc( true )
+    , m_bInCheckMode( false )
+    , m_bAdjustActive( false )
+    , m_bInDelete( false )
+    , m_nActive( 0 )
+    , m_nTopIndex( 0 )
+    , m_nStdHeight( 0 )
+    , m_nActiveHeight( 0 )
+    , m_aSharedImage(StockImage::Yes, RID_BMP_SHARED)
+    , m_aLockedImage(StockImage::Yes, RID_BMP_LOCKED)
+    , m_aWarningImage(StockImage::Yes, RID_BMP_WARNING)
+    , m_aDefaultImage(StockImage::Yes, RID_BMP_EXTENSION)
+    , m_pManager( nullptr )
+    , m_xScrollBar(std::move(xScroll))
+{
+}
+
+void ExtensionBox_Impl::Init()
+{
+    m_xScrollBar->connect_vadjustment_changed( LINK( this, ExtensionBox_Impl, ScrollHdl ) );
+
+    auto nIconHeight = 2*TOP_OFFSET + SMALL_ICON_SIZE;
+    auto nTitleHeight = 2*TOP_OFFSET + GetTextHeight();
+    if ( nIconHeight < nTitleHeight )
+        m_nStdHeight = nTitleHeight;
+    else
+        m_nStdHeight = nIconHeight;
+    m_nStdHeight += GetTextHeight() + TOP_OFFSET;
+
+    nIconHeight = ICON_HEIGHT + 2*TOP_OFFSET + 1;
+    if ( m_nStdHeight < nIconHeight )
+        m_nStdHeight = nIconHeight;
+
+    m_nActiveHeight = m_nStdHeight;
+
+    m_xRemoveListener = new ExtensionRemovedListener( this );
+
+    m_pLocale.reset( new lang::Locale( Application::GetSettings().GetLanguageTag().getLocale() ) );
+    m_pCollator.reset( new CollatorWrapper( ::comphelper::getProcessComponentContext() ) );
+    m_pCollator->loadDefaultCollator( *m_pLocale, i18n::CollatorOptions::CollatorOptions_IGNORE_CASE );
+}
+
+ExtensionBox_Impl::~ExtensionBox_Impl()
+{
+    if ( ! m_bInDelete )
+        DeleteRemoved();
+
+    m_bInDelete = true;
+
+    for (auto const& entry : m_vEntries)
+    {
+        entry->m_xPackage->removeEventListener( m_xRemoveListener );
+    }
+
+    m_vEntries.clear();
+
+    m_xRemoveListener.clear();
+
+    m_pLocale.reset();
+    m_pCollator.reset();
+}
+
+sal_Int32 ExtensionBox_Impl::getItemCount() const
+{
+    return static_cast< sal_Int32 >( m_vEntries.size() );
+}
+
+
+sal_Int32 ExtensionBox_Impl::getSelIndex() const
+{
+    if ( m_bHasActive )
+    {
+        OSL_ASSERT( m_nActive >= -1);
+        return static_cast< sal_Int32 >( m_nActive );
+    }
+    else
+        return ENTRY_NOTFOUND;
+}
+
+
+// Title + description
+void ExtensionBox_Impl::CalcActiveHeight( const tools::Long nPos )
+{
+    const ::osl::MutexGuard aGuard( m_entriesMutex );
+
+    // get title height
+    tools::Long aTextHeight;
+    tools::Long nIconHeight = 2*TOP_OFFSET + SMALL_ICON_SIZE;
+    tools::Long nTitleHeight = 2*TOP_OFFSET + GetTextHeight();
+    if ( nIconHeight < nTitleHeight )
+        aTextHeight = nTitleHeight;
+    else
+        aTextHeight = nIconHeight;
+
+    // calc description height
+    Size aSize = GetOutputSizePixel();
+
+    aSize.AdjustWidth( -(ICON_OFFSET) );
+    aSize.setHeight( 10000 );
+
+    OUString aText( m_vEntries[ nPos ]->m_sErrorText );
+    if ( !aText.isEmpty() )
+        aText += "\n";
+    aText += m_vEntries[ nPos ]->m_sDescription;
+
+    tools::Rectangle aRect = GetDrawingArea()->get_ref_device().GetTextRect(tools::Rectangle( Point(), aSize ), aText,
+                                                                            DrawTextFlags::MultiLine | DrawTextFlags::WordBreak);
+    aTextHeight += aRect.GetHeight();
+
+    if ( aTextHeight < m_nStdHeight )
+        aTextHeight = m_nStdHeight;
+
+    m_nActiveHeight = aTextHeight;
+
+    if ( m_vEntries[ nPos ]->m_bHasButtons )
+        m_nActiveHeight += 2;
+}
+
+tools::Rectangle ExtensionBox_Impl::GetEntryRect( const tools::Long nPos ) const
+{
+    const ::osl::MutexGuard aGuard( m_entriesMutex );
+
+    Size aSize( GetOutputSizePixel() );
+
+    if ( m_vEntries[ nPos ]->m_bActive )
+        aSize.setHeight( m_nActiveHeight );
+    else
+        aSize.setHeight( m_nStdHeight );
+
+    Point aPos( 0, -m_nTopIndex + nPos * m_nStdHeight );
+    if ( m_bHasActive && ( nPos < m_nActive ) )
+        aPos.AdjustY(m_nActiveHeight - m_nStdHeight );
+
+    return tools::Rectangle( aPos, aSize );
+}
+
+
+void ExtensionBox_Impl::DeleteRemoved()
+{
+    const ::osl::MutexGuard aGuard( m_entriesMutex );
+
+    m_bInDelete = true;
+
+    m_vRemovedEntries.clear();
+
+    m_bInDelete = false;
+}
+
+
+//This function may be called with nPos < 0
+void ExtensionBox_Impl::selectEntry( const tools::Long nPos )
+{
+    bool invalidate = false;
+    {
+        //ToDo we should not use the guard at such a big scope here.
+        //Currently it is used to guard m_vEntries and m_nActive. m_nActive will be
+        //modified in this function.
+        //It would be probably best to always use a copy of m_vEntries
+        //and some other state variables from ExtensionBox_Impl for
+        //the whole painting operation. See issue i86993
+        ::osl::MutexGuard guard(m_entriesMutex);
+
+        if ( m_bInCheckMode )
+            return;
+
+        if ( m_bHasActive )
+        {
+            if ( nPos == m_nActive )
+                return;
+
+            m_bHasActive = false;
+            m_vEntries[ m_nActive ]->m_bActive = false;
+        }
+
+        if ( ( nPos >= 0 ) && ( o3tl::make_unsigned(nPos) < m_vEntries.size() ) )
+        {
+            m_bHasActive = true;
+            m_nActive = nPos;
+            m_vEntries[ nPos ]->m_bActive = true;
+
+            if ( IsReallyVisible() )
+            {
+                m_bAdjustActive = true;
+            }
+        }
+
+        if ( IsReallyVisible() )
+        {
+            m_bNeedsRecalc = true;
+            invalidate = true;
+        }
+    }
+
+    if (invalidate)
+    {
+        SolarMutexGuard g;
+        Invalidate();
+    }
+}
+
+
+void ExtensionBox_Impl::DrawRow(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect, const TEntry_Impl& rEntry)
+{
+    const StyleSettings& rStyleSettings = rRenderContext.GetSettings().GetStyleSettings();
+
+    if (rEntry->m_bActive)
+        rRenderContext.SetTextColor(rStyleSettings.GetHighlightTextColor());
+    else if ((rEntry->m_eState != REGISTERED) && (rEntry->m_eState != NOT_AVAILABLE))
+        rRenderContext.SetTextColor(rStyleSettings.GetDisableColor());
+    else
+        rRenderContext.SetTextColor(rStyleSettings.GetFieldTextColor());
+
+    if (rEntry->m_bActive)
+    {
+        rRenderContext.SetLineColor();
+        rRenderContext.SetFillColor(rStyleSettings.GetHighlightColor());
+        rRenderContext.DrawRect(rRect);
+    }
+    else
+    {
+        rRenderContext.SetBackground(rStyleSettings.GetFieldColor());
+        rRenderContext.SetTextFillColor();
+        rRenderContext.Erase(rRect);
+    }
+
+    // Draw extension icon
+    Point aPos( rRect.TopLeft() );
+    aPos += Point(TOP_OFFSET, TOP_OFFSET);
+    Image aImage;
+    if (!rEntry->m_aIcon)
+        aImage = m_aDefaultImage;
+    else
+        aImage = rEntry->m_aIcon;
+    Size aImageSize = aImage.GetSizePixel();
+    if ((aImageSize.Width() <= ICON_WIDTH ) && ( aImageSize.Height() <= ICON_HEIGHT ) )
+        rRenderContext.DrawImage(Point(aPos.X() + ((ICON_WIDTH - aImageSize.Width()) / 2),
+                                       aPos.Y() + ((ICON_HEIGHT - aImageSize.Height()) / 2)),
+                                 aImage);
+    else
+        rRenderContext.DrawImage(aPos, Size(ICON_WIDTH, ICON_HEIGHT), aImage);
+
+    // Setup fonts
+    // expand the point size of the desired font to the equivalent pixel size
+    weld::SetPointFont(rRenderContext, GetDrawingArea()->get_font());
+    vcl::Font aStdFont(rRenderContext.GetFont());
+    vcl::Font aBoldFont(aStdFont);
+    aBoldFont.SetWeight(WEIGHT_BOLD);
+    rRenderContext.SetFont(aBoldFont);
+    auto aTextHeight = rRenderContext.GetTextHeight();
+
+    // Get max title width
+    auto nMaxTitleWidth = rRect.GetWidth() - ICON_OFFSET;
+    nMaxTitleWidth -= (2 * SMALL_ICON_SIZE) + (4 * SPACE_BETWEEN);
+    rRenderContext.SetFont(aStdFont);
+    tools::Long nLinkWidth = 0;
+    if (!rEntry->m_sPublisher.isEmpty())
+    {
+        nLinkWidth = rRenderContext.GetTextWidth(rEntry->m_sPublisher);
+        nMaxTitleWidth -= nLinkWidth + (2 * SPACE_BETWEEN);
+    }
+    tools::Long aVersionWidth = rRenderContext.GetTextWidth(rEntry->m_sVersion);
+
+    aPos = rRect.TopLeft() + Point(ICON_OFFSET, TOP_OFFSET);
+
+    rRenderContext.SetFont(aBoldFont);
+    tools::Long aTitleWidth = rRenderContext.GetTextWidth(rEntry->m_sTitle) + (aTextHeight / 3);
+    if (aTitleWidth > nMaxTitleWidth - aVersionWidth)
+    {
+        aTitleWidth = nMaxTitleWidth - aVersionWidth - (aTextHeight / 3);
+        OUString aShortTitle = rRenderContext.GetEllipsisString(rEntry->m_sTitle, aTitleWidth);
+        rRenderContext.DrawText(aPos, aShortTitle);
+        aTitleWidth += (aTextHeight / 3);
+    }
+    else
+        rRenderContext.DrawText(aPos, rEntry->m_sTitle);
+
+    rRenderContext.SetFont(aStdFont);
+    rRenderContext.DrawText(Point(aPos.X() + aTitleWidth, aPos.Y()), rEntry->m_sVersion);
+
+    tools::Long nIconHeight = TOP_OFFSET + SMALL_ICON_SIZE;
+    tools::Long nTitleHeight = TOP_OFFSET + GetTextHeight();
+    if ( nIconHeight < nTitleHeight )
+        aTextHeight = nTitleHeight;
+    else
+        aTextHeight = nIconHeight;
+
+    // draw description
+    OUString sDescription;
+    if (!rEntry->m_sErrorText.isEmpty())
+    {
+        if (rEntry->m_bActive)
+            sDescription = rEntry->m_sErrorText + "\n" + rEntry->m_sDescription;
+        else
+            sDescription = rEntry->m_sErrorText;
+    }
+    else
+        sDescription = rEntry->m_sDescription;
+
+    aPos.AdjustY(aTextHeight );
+    if (rEntry->m_bActive)
+    {
+        tools::Long nExtraHeight = 0;
+
+        if (rEntry->m_bHasButtons)
+            nExtraHeight = 2;
+
+        rRenderContext.DrawText(tools::Rectangle(aPos.X(), aPos.Y(), rRect.Right(), rRect.Bottom() - nExtraHeight),
+                                sDescription, DrawTextFlags::MultiLine | DrawTextFlags::WordBreak );
+    }
+    else
+    {
+        //replace LF to space, so words do not stick together in one line view
+        sDescription = sDescription.replace(0x000A, ' ');
+        const tools::Long nWidth = rRenderContext.GetTextWidth( sDescription );
+        if (nWidth > rRect.GetWidth() - aPos.X())
+            sDescription = rRenderContext.GetEllipsisString(sDescription, rRect.GetWidth() - aPos.X());
+        rRenderContext.DrawText(aPos, sDescription);
+    }
+
+    // Draw publisher link
+    if (!rEntry->m_sPublisher.isEmpty())
+    {
+        aPos = rRect.TopLeft() + Point( ICON_OFFSET + nMaxTitleWidth + (2*SPACE_BETWEEN), TOP_OFFSET );
+
+        rRenderContext.Push(vcl::PushFlags::FONT | vcl::PushFlags::TEXTCOLOR | vcl::PushFlags::TEXTFILLCOLOR);
+        rRenderContext.SetTextColor(rStyleSettings.GetLinkColor());
+        rRenderContext.SetTextFillColor(rStyleSettings.GetFieldColor());
+        vcl::Font aFont = rRenderContext.GetFont();
+        // to underline
+        aFont.SetUnderline(LINESTYLE_SINGLE);
+        rRenderContext.SetFont(aFont);
+        rRenderContext.DrawText(aPos, rEntry->m_sPublisher);
+        rEntry->m_aLinkRect = tools::Rectangle(aPos, Size(nLinkWidth, aTextHeight));
+        rRenderContext.Pop();
+    }
+
+    // Draw status icons
+    if (!rEntry->m_bUser)
+    {
+        aPos = rRect.TopRight() + Point( -(RIGHT_ICON_OFFSET + SMALL_ICON_SIZE), TOP_OFFSET );
+        if (rEntry->m_bLocked)
+            rRenderContext.DrawImage(aPos, Size(SMALL_ICON_SIZE, SMALL_ICON_SIZE), m_aLockedImage);
+        else
+            rRenderContext.DrawImage(aPos, Size(SMALL_ICON_SIZE, SMALL_ICON_SIZE), m_aSharedImage);
+    }
+    if ((rEntry->m_eState == AMBIGUOUS ) || rEntry->m_bMissingDeps || rEntry->m_bMissingLic)
+    {
+        aPos = rRect.TopRight() + Point(-(RIGHT_ICON_OFFSET + SPACE_BETWEEN + 2 * SMALL_ICON_SIZE), TOP_OFFSET);
+        rRenderContext.DrawImage(aPos, Size(SMALL_ICON_SIZE, SMALL_ICON_SIZE), m_aWarningImage);
+    }
+
+    rRenderContext.SetLineColor(COL_LIGHTGRAY);
+    rRenderContext.DrawLine(rRect.BottomLeft(), rRect.BottomRight());
+}
+
+
+void ExtensionBox_Impl::RecalcAll()
+{
+    if ( m_bHasActive )
+        CalcActiveHeight( m_nActive );
+
+    SetupScrollBar();
+
+    if ( m_bHasActive )
+    {
+        tools::Rectangle aEntryRect = GetEntryRect( m_nActive );
+
+        if ( m_bAdjustActive )
+        {
+            m_bAdjustActive = false;
+
+            // If the top of the selected entry isn't visible, make it visible
+            if ( aEntryRect.Top() < 0 )
+            {
+                m_nTopIndex += aEntryRect.Top();
+                aEntryRect.Move( 0, -aEntryRect.Top() );
+            }
+
+            // If the bottom of the selected entry isn't visible, make it visible even if now the top
+            // isn't visible any longer ( the buttons are more important )
+            Size aOutputSize = GetOutputSizePixel();
+            if ( aEntryRect.Bottom() > aOutputSize.Height() )
+            {
+                m_nTopIndex += ( aEntryRect.Bottom() - aOutputSize.Height() );
+                aEntryRect.Move( 0, -( aEntryRect.Bottom() - aOutputSize.Height() ) );
+            }
+
+            // If there is unused space below the last entry but all entries don't fit into the box,
+            // move the content down to use the whole space
+            const tools::Long nTotalHeight = GetTotalHeight();
+            if ( m_bHasScrollBar && ( aOutputSize.Height() + m_nTopIndex > nTotalHeight ) )
+            {
+                tools::Long nOffset = m_nTopIndex;
+                m_nTopIndex = nTotalHeight - aOutputSize.Height();
+                nOffset -= m_nTopIndex;
+                aEntryRect.Move( 0, nOffset );
+            }
+
+            if ( m_bHasScrollBar )
+                m_xScrollBar->vadjustment_set_value( m_nTopIndex );
+        }
+    }
+
+    m_bNeedsRecalc = false;
+}
+
+
+bool ExtensionBox_Impl::HandleCursorKey( sal_uInt16 nKeyCode )
+{
+    if ( m_vEntries.empty() )
+        return true;
+
+    tools::Long nSelect = 0;
+
+    if ( m_bHasActive )
+    {
+        tools::Long nPageSize = GetOutputSizePixel().Height() / m_nStdHeight;
+        if ( nPageSize < 2 )
+            nPageSize = 2;
+
+        if ( ( nKeyCode == KEY_DOWN ) || ( nKeyCode == KEY_RIGHT ) )
+            nSelect = m_nActive + 1;
+        else if ( ( nKeyCode == KEY_UP ) || ( nKeyCode == KEY_LEFT ) )
+            nSelect = m_nActive - 1;
+        else if ( nKeyCode == KEY_HOME )
+            nSelect = 0;
+        else if ( nKeyCode == KEY_END )
+            nSelect = m_vEntries.size() - 1;
+        else if ( nKeyCode == KEY_PAGEUP )
+            nSelect = m_nActive - nPageSize + 1;
+        else if ( nKeyCode == KEY_PAGEDOWN )
+            nSelect = m_nActive + nPageSize - 1;
+    }
+    else // when there is no selected entry, we will select the first or the last.
+    {
+        if ( ( nKeyCode == KEY_DOWN ) || ( nKeyCode == KEY_PAGEDOWN ) || ( nKeyCode == KEY_HOME ) )
+            nSelect = 0;
+        else if ( ( nKeyCode == KEY_UP ) || ( nKeyCode == KEY_PAGEUP ) || ( nKeyCode == KEY_END ) )
+            nSelect = m_vEntries.size() - 1;
+    }
+
+    if ( nSelect < 0 )
+        nSelect = 0;
+    if ( o3tl::make_unsigned(nSelect) >= m_vEntries.size() )
+        nSelect = m_vEntries.size() - 1;
+
+    selectEntry( nSelect );
+
+    return true;
+}
+
+
+void ExtensionBox_Impl::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& /*rPaintRect*/)
+{
+    if ( !m_bInDelete )
+        DeleteRemoved();
+
+    if ( m_bNeedsRecalc )
+        RecalcAll();
+
+    Point aStart( 0, -m_nTopIndex );
+    Size aSize(GetOutputSizePixel());
+
+    const ::osl::MutexGuard aGuard( m_entriesMutex );
+
+    for (auto const& entry : m_vEntries)
+    {
+        aSize.setHeight( entry->m_bActive ? m_nActiveHeight : m_nStdHeight );
+        tools::Rectangle aEntryRect( aStart, aSize );
+        DrawRow(rRenderContext, aEntryRect, entry);
+        aStart.AdjustY(aSize.Height() );
+    }
+}
+
+
+tools::Long ExtensionBox_Impl::GetTotalHeight() const
+{
+    tools::Long nHeight = m_vEntries.size() * m_nStdHeight;
+
+    if ( m_bHasActive )
+    {
+        nHeight += m_nActiveHeight - m_nStdHeight;
+    }
+
+    return nHeight;
+}
+
+
+void ExtensionBox_Impl::SetupScrollBar()
+{
+    const Size aSize = GetOutputSizePixel();
+    const auto nTotalHeight = GetTotalHeight();
+    const bool bNeedsScrollBar = ( nTotalHeight > aSize.Height() );
+
+    if ( bNeedsScrollBar )
+    {
+        if ( m_nTopIndex + aSize.Height() > nTotalHeight )
+            m_nTopIndex = nTotalHeight - aSize.Height();
+
+        m_xScrollBar->vadjustment_configure(m_nTopIndex, 0, nTotalHeight,
+                                            m_nStdHeight, ( aSize.Height() * 4 ) / 5,
+                                            aSize.Height());
+
+        if (!m_bHasScrollBar)
+            m_xScrollBar->set_vpolicy(VclPolicyType::ALWAYS);
+    }
+    else if ( m_bHasScrollBar )
+    {
+        m_xScrollBar->set_vpolicy(VclPolicyType::NEVER);
+        m_nTopIndex = 0;
+    }
+
+    m_bHasScrollBar = bNeedsScrollBar;
+}
+
+
+void ExtensionBox_Impl::Resize()
+{
+    RecalcAll();
+    Invalidate();
+}
+
+void ExtensionBox_Impl::SetDrawingArea(weld::DrawingArea* pDrawingArea)
+{
+    Size aSize = pDrawingArea->get_ref_device().LogicToPixel(Size(250, 150), MapMode(MapUnit::MapAppFont));
+    pDrawingArea->set_size_request(aSize.Width(), aSize.Height());
+    CustomWidgetController::SetDrawingArea(pDrawingArea);
+    SetOutputSizePixel(aSize);
+
+    Init();
+}
+
+tools::Long ExtensionBox_Impl::PointToPos( const Point& rPos )
+{
+    tools::Long nPos = ( rPos.Y() + m_nTopIndex ) / m_nStdHeight;
+
+    if ( m_bHasActive && ( nPos > m_nActive ) )
+    {
+        if ( rPos.Y() + m_nTopIndex <= m_nActive*m_nStdHeight + m_nActiveHeight )
+            nPos = m_nActive;
+        else
+            nPos = ( rPos.Y() + m_nTopIndex - (m_nActiveHeight - m_nStdHeight) ) / m_nStdHeight;
+    }
+
+    return nPos;
+}
+
+bool ExtensionBox_Impl::MouseMove( const MouseEvent& rMEvt )
+{
+    bool bOverHyperlink = false;
+
+    auto nPos = PointToPos( rMEvt.GetPosPixel() );
+    if ( ( nPos >= 0 ) && ( o3tl::make_unsigned(nPos) < m_vEntries.size() ) )
+    {
+        const auto& rEntry = m_vEntries[nPos];
+        bOverHyperlink = !rEntry->m_sPublisher.isEmpty() && rEntry->m_aLinkRect.Contains(rMEvt.GetPosPixel());
+    }
+
+    if (bOverHyperlink)
+        SetPointer(PointerStyle::RefHand);
+    else
+        SetPointer(PointerStyle::Arrow);
+
+    return false;
+}
+
+OUString ExtensionBox_Impl::RequestHelp(tools::Rectangle& rRect)
+{
+    auto nPos = PointToPos( rRect.TopLeft() );
+    if ( ( nPos >= 0 ) && ( o3tl::make_unsigned(nPos) < m_vEntries.size() ) )
+    {
+        const auto& rEntry = m_vEntries[nPos];
+        bool bOverHyperlink = !rEntry->m_sPublisher.isEmpty() && rEntry->m_aLinkRect.Contains(rRect);
+        if (bOverHyperlink)
+        {
+            rRect = rEntry->m_aLinkRect;
+            return rEntry->m_sPublisherURL;
+        }
+    }
+
+    return OUString();
+}
+
+bool ExtensionBox_Impl::MouseButtonDown( const MouseEvent& rMEvt )
+{
+    if ( !rMEvt.IsLeft() )
+        return false;
+
+    if (rMEvt.IsMod1() && m_bHasActive)
+        selectEntry(ExtensionBox_Impl::ENTRY_NOTFOUND);   // Selecting a not existing entry will deselect the current one
+    else
+    {
+        auto nPos = PointToPos( rMEvt.GetPosPixel() );
+
+        if ( ( nPos >= 0 ) && ( o3tl::make_unsigned(nPos) < m_vEntries.size() ) )
+        {
+            const auto& rEntry = m_vEntries[nPos];
+            if (!rEntry->m_sPublisher.isEmpty() && rEntry->m_aLinkRect.Contains(rMEvt.GetPosPixel()))
+            {
+                try
+                {
+                    css::uno::Reference<css::system::XSystemShellExecute> xSystemShellExecute(
+                        css::system::SystemShellExecute::create(comphelper::getProcessComponentContext()));
+                    //throws css::lang::IllegalArgumentException, css::system::SystemShellExecuteException
+                    xSystemShellExecute->execute(rEntry->m_sPublisherURL, OUString(), css::system::SystemShellExecuteFlags::URIS_ONLY);
+                }
+                catch (...)
+                {
+                }
+                return true;
+            }
+        }
+
+        selectEntry( nPos );
+    }
+    return true;
+}
+
+bool ExtensionBox_Impl::KeyInput(const KeyEvent& rKEvt)
+{
+    if ( !m_bInDelete )
+        DeleteRemoved();
+
+    vcl::KeyCode aKeyCode = rKEvt.GetKeyCode();
+    sal_uInt16 nKeyCode = aKeyCode.GetCode();
+
+    bool bHandled = false;
+    if (nKeyCode != KEY_TAB && aKeyCode.GetGroup() == KEYGROUP_CURSOR)
+        bHandled = HandleCursorKey(nKeyCode);
+
+    return bHandled;
+}
+
+bool ExtensionBox_Impl::FindEntryPos( const TEntry_Impl& rEntry, const tools::Long nStart,
+                                      const tools::Long nEnd, tools::Long &nPos )
+{
+    nPos = nStart;
+    if ( nStart > nEnd )
+        return false;
+
+    sal_Int32 eCompare;
+
+    if ( nStart == nEnd )
+    {
+        eCompare = rEntry->CompareTo( m_pCollator.get(), m_vEntries[ nStart ] );
+        if ( eCompare < 0 )
+            return false;
+        else if ( eCompare == 0 )
+        {
+            //Workaround. See i86963.
+            if (rEntry->m_xPackage != m_vEntries[nStart]->m_xPackage)
+                return false;
+
+            if ( m_bInCheckMode )
+                m_vEntries[ nStart ]->m_bChecked = true;
+            return true;
+        }
+        else
+        {
+            nPos = nStart + 1;
+            return false;
+        }
+    }
+
+    const tools::Long nMid = nStart + ( ( nEnd - nStart ) / 2 );
+    eCompare = rEntry->CompareTo( m_pCollator.get(), m_vEntries[ nMid ] );
+
+    if ( eCompare < 0 )
+        return FindEntryPos( rEntry, nStart, nMid-1, nPos );
+    else if ( eCompare > 0 )
+        return FindEntryPos( rEntry, nMid+1, nEnd, nPos );
+    else
+    {
+        //Workaround.See i86963.
+        if (rEntry->m_xPackage != m_vEntries[nMid]->m_xPackage)
+            return false;
+
+        if ( m_bInCheckMode )
+            m_vEntries[ nMid ]->m_bChecked = true;
+        nPos = nMid;
+        return true;
+    }
+}
+
+void ExtensionBox_Impl::cleanVecListenerAdded()
+{
+    m_vListenerAdded.erase(std::remove_if(m_vListenerAdded.begin(), m_vListenerAdded.end(),
+        [](const uno::WeakReference<deployment::XPackage>& rxListener) {
+            const uno::Reference<deployment::XPackage> hardRef(rxListener);
+            return !hardRef.is();
+        }),
+        m_vListenerAdded.end());
+}
+
+void ExtensionBox_Impl::addEventListenerOnce(
+    uno::Reference<deployment::XPackage > const & extension)
+{
+    //make sure to only add the listener once
+    cleanVecListenerAdded();
+    if ( std::none_of(m_vListenerAdded.begin(), m_vListenerAdded.end(),
+                        FindWeakRef(extension)) )
+    {
+        extension->addEventListener( m_xRemoveListener );
+        m_vListenerAdded.emplace_back(extension);
+    }
+}
+
+
+void ExtensionBox_Impl::addEntry( const uno::Reference< deployment::XPackage > &xPackage,
+                                  bool bLicenseMissing )
+{
+    PackageState eState = TheExtensionManager::getPackageState( xPackage );
+    bool         bLocked = m_pManager->isReadOnly( xPackage );
+
+    TEntry_Impl pEntry = std::make_shared<Entry_Impl>( xPackage, eState, bLocked );
+
+    // Don't add empty entries
+    if ( pEntry->m_sTitle.isEmpty() )
+        return;
+
+    {
+        osl::MutexGuard guard(m_entriesMutex);
+        tools::Long nPos = 0;
+        if (m_vEntries.empty())
+        {
+            addEventListenerOnce(xPackage);
+            m_vEntries.push_back(pEntry);
+        }
+        else
+        {
+            if (!FindEntryPos(pEntry, 0, m_vEntries.size() - 1, nPos))
+            {
+                addEventListenerOnce(xPackage);
+                m_vEntries.insert(m_vEntries.begin() + nPos, pEntry);
+            }
+            else if (!m_bInCheckMode)
+            {
+                OSL_FAIL("ExtensionBox_Impl::addEntry(): Will not add duplicate entries");
+            }
+        }
+
+        pEntry->m_bHasOptions = m_pManager->supportsOptions(xPackage);
+        pEntry->m_bUser = (xPackage->getRepositoryName() == USER_PACKAGE_MANAGER);
+        pEntry->m_bShared = (xPackage->getRepositoryName() == SHARED_PACKAGE_MANAGER);
+        pEntry->m_bNew = m_bInCheckMode;
+        pEntry->m_bMissingLic = bLicenseMissing;
+
+        if (bLicenseMissing)
+            pEntry->m_sErrorText = DpResId(RID_STR_ERROR_MISSING_LICENSE);
+
+        //access to m_nActive must be guarded
+        if (!m_bInCheckMode && m_bHasActive && (m_nActive >= nPos))
+            m_nActive += 1;
+    }
+
+    if ( IsReallyVisible() )
+        Invalidate();
+
+    m_bNeedsRecalc = true;
+}
+
+void ExtensionBox_Impl::updateEntry( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    for (auto const& entry : m_vEntries)
+    {
+        if ( entry->m_xPackage == xPackage )
+        {
+            PackageState eState = TheExtensionManager::getPackageState( xPackage );
+            entry->m_bHasOptions = m_pManager->supportsOptions( xPackage );
+            entry->m_eState = eState;
+            entry->m_sTitle = xPackage->getDisplayName();
+            entry->m_sVersion = xPackage->getVersion();
+            entry->m_sDescription = xPackage->getDescription();
+
+            if ( eState == REGISTERED )
+                entry->m_bMissingLic = false;
+
+            if ( eState == AMBIGUOUS )
+                entry->m_sErrorText = DpResId( RID_STR_ERROR_UNKNOWN_STATUS );
+            else if ( ! entry->m_bMissingLic )
+                entry->m_sErrorText.clear();
+
+            if ( IsReallyVisible() )
+                Invalidate();
+            break;
+        }
+    }
+}
+
+//This function is also called as a result of removing an extension.
+//see PackageManagerImpl::removePackage
+//The gui is a registered as listener on the package. Removing it will cause the
+//listeners to be notified and then this function is called. At this moment xPackage
+//is in the disposing state and all calls on it may result in a DisposedException.
+void ExtensionBox_Impl::removeEntry( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if (  m_bInDelete )
+        return;
+
+    bool invalidate = false;
+    {
+        ::osl::ClearableMutexGuard aGuard( m_entriesMutex );
+
+        auto iIndex = std::find_if(m_vEntries.begin(), m_vEntries.end(),
+            [&xPackage](const TEntry_Impl& rxEntry) { return rxEntry->m_xPackage == xPackage; });
+        if (iIndex != m_vEntries.end())
+        {
+            tools::Long nPos = iIndex - m_vEntries.begin();
+
+            // Entries mustn't be removed here, because they contain a hyperlink control
+            // which can only be deleted when the thread has the solar mutex. Therefore
+            // the entry will be moved into the m_vRemovedEntries list which will be
+            // cleared on the next paint event
+            m_vRemovedEntries.push_back( *iIndex );
+            (*iIndex)->m_xPackage->removeEventListener(m_xRemoveListener);
+            m_vEntries.erase( iIndex );
+
+            m_bNeedsRecalc = true;
+
+            if ( IsReallyVisible() )
+                invalidate = true;
+
+            if ( m_bHasActive )
+            {
+                if ( nPos < m_nActive )
+                    m_nActive -= 1;
+                else if ( ( nPos == m_nActive ) &&
+                          ( nPos == static_cast<tools::Long>(m_vEntries.size()) ) )
+                    m_nActive -= 1;
+
+                m_bHasActive = false;
+                //clear before calling out of this method
+                aGuard.clear();
+                selectEntry( m_nActive );
+            }
+        }
+    }
+
+    if (invalidate)
+    {
+        SolarMutexGuard g;
+        Invalidate();
+    }
+}
+
+
+void ExtensionBox_Impl::RemoveUnlocked()
+{
+    bool bAllRemoved = false;
+
+    while ( ! bAllRemoved )
+    {
+        bAllRemoved = true;
+
+        ::osl::ClearableMutexGuard aGuard( m_entriesMutex );
+
+        for (auto const& entry : m_vEntries)
+        {
+            if ( !entry->m_bLocked )
+            {
+                bAllRemoved = false;
+                uno::Reference< deployment::XPackage> xPackage = entry->m_xPackage;
+                aGuard.clear();
+                removeEntry( xPackage );
+                break;
+            }
+        }
+    }
+}
+
+
+void ExtensionBox_Impl::prepareChecking()
+{
+    m_bInCheckMode = true;
+    for (auto const& entry : m_vEntries)
+    {
+        entry->m_bChecked = false;
+        entry->m_bNew = false;
+    }
+}
+
+
+void ExtensionBox_Impl::checkEntries()
+{
+    tools::Long nNewPos = -1;
+    tools::Long nChangedActivePos = -1;
+    tools::Long nPos = 0;
+    bool bNeedsUpdate = false;
+
+    {
+        osl::MutexGuard guard(m_entriesMutex);
+        auto iIndex = m_vEntries.begin();
+        while (iIndex != m_vEntries.end())
+        {
+            if (!(*iIndex)->m_bChecked)
+            {
+                (*iIndex)->m_bChecked = true;
+                bNeedsUpdate = true;
+                nPos = iIndex - m_vEntries.begin();
+                if ((*iIndex)->m_bNew)
+                { // add entry to list and correct active pos
+                    if (nNewPos == -1)
+                        nNewPos = nPos;
+                    if (nPos <= m_nActive)
+                        m_nActive += 1;
+                    ++iIndex;
+                }
+                else
+                { // remove entry from list
+                    if (nPos < nNewPos)
+                    {
+                        --nNewPos;
+                    }
+                    if (nPos < nChangedActivePos)
+                    {
+                        --nChangedActivePos;
+                    }
+                    if (nPos < m_nActive)
+                        m_nActive -= 1;
+                    else if (nPos == m_nActive)
+                    {
+                        nChangedActivePos = nPos;
+                        m_nActive = -1;
+                        m_bHasActive = false;
+                    }
+                    m_vRemovedEntries.push_back(*iIndex);
+                    (*iIndex)->m_xPackage->removeEventListener(m_xRemoveListener);
+                    iIndex = m_vEntries.erase(iIndex);
+                }
+            }
+            else
+                ++iIndex;
+        }
+    }
+
+    m_bInCheckMode = false;
+
+    if ( nNewPos != - 1)
+        selectEntry( nNewPos );
+    else if (nChangedActivePos != -1) {
+        selectEntry(nChangedActivePos);
+    }
+
+    if ( bNeedsUpdate )
+    {
+        m_bNeedsRecalc = true;
+        if ( IsReallyVisible() )
+            Invalidate();
+    }
+}
+
+IMPL_LINK(ExtensionBox_Impl, ScrollHdl, weld::ScrolledWindow&, rScrBar, void)
+{
+    m_nTopIndex = rScrBar.vadjustment_get_value();
+    Invalidate();
+}
+
+} //namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_extlistbox.hxx b/desktop/source/deployment/gui/dp_gui_extlistbox.hxx
new file mode 100644
index 000000000..d706975dc
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_extlistbox.hxx
@@ -0,0 +1,214 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <vcl/customweld.hxx>
+#include <vcl/image.hxx>
+#include <vcl/weld.hxx>
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/weakref.hxx>
+#include <unotools/collatorwrapper.hxx>
+
+#include <com/sun/star/lang/Locale.hpp>
+#include <com/sun/star/lang/XEventListener.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+
+#include <memory>
+
+#include "dp_gui.h"
+
+namespace dp_gui {
+
+#define SMALL_ICON_SIZE     16
+#define TOP_OFFSET           5
+#define ICON_HEIGHT         42
+#define ICON_WIDTH          47
+#define ICON_OFFSET         72
+#define RIGHT_ICON_OFFSET    5
+#define SPACE_BETWEEN        3
+
+class TheExtensionManager;
+
+
+struct Entry_Impl;
+
+typedef std::shared_ptr< Entry_Impl > TEntry_Impl;
+
+struct Entry_Impl
+{
+    bool            m_bActive       :1;
+    bool            m_bLocked       :1;
+    bool            m_bHasOptions   :1;
+    bool            m_bUser         :1;
+    bool            m_bShared       :1;
+    bool            m_bNew          :1;
+    bool            m_bChecked      :1;
+    bool            m_bMissingDeps  :1;
+    bool            m_bHasButtons   :1;
+    bool            m_bMissingLic   :1;
+    PackageState    m_eState;
+    OUString        m_sTitle;
+    OUString        m_sVersion;
+    OUString        m_sDescription;
+    OUString        m_sPublisher;
+    OUString        m_sPublisherURL;
+    OUString        m_sErrorText;
+    OUString        m_sLicenseText;
+    Image           m_aIcon;
+    tools::Rectangle m_aLinkRect;
+
+    css::uno::Reference<css::deployment::XPackage> m_xPackage;
+
+    Entry_Impl(const css::uno::Reference<css::deployment::XPackage> &xPackage,
+               const PackageState eState, const bool bReadOnly);
+   ~Entry_Impl();
+
+    sal_Int32 CompareTo(const CollatorWrapper *pCollator, const TEntry_Impl& rEntry) const;
+    void checkDependencies();
+};
+
+class ExtensionBox_Impl;
+
+
+class ExtensionRemovedListener : public ::cppu::WeakImplHelper<css::lang::XEventListener>
+{
+    ExtensionBox_Impl*   m_pParent;
+
+public:
+
+    explicit ExtensionRemovedListener( ExtensionBox_Impl *pParent ) { m_pParent = pParent; }
+    virtual ~ExtensionRemovedListener() override;
+
+
+    // XEventListener
+    virtual void SAL_CALL disposing(css::lang::EventObject const& evt) override;
+};
+
+class ExtensionBox_Impl : public weld::CustomWidgetController
+{
+    bool m_bHasScrollBar : 1;
+    bool m_bHasActive : 1;
+    bool m_bNeedsRecalc : 1;
+    bool m_bInCheckMode : 1;
+    bool m_bAdjustActive : 1;
+    bool m_bInDelete : 1;
+    //Must be guarded together with m_vEntries to ensure a valid index at all times.
+    //Use m_entriesMutex as guard.
+    tools::Long m_nActive;
+    tools::Long m_nTopIndex;
+    tools::Long m_nStdHeight;
+    tools::Long m_nActiveHeight;
+    Image m_aSharedImage;
+    Image m_aLockedImage;
+    Image m_aWarningImage;
+    Image m_aDefaultImage;
+
+    rtl::Reference<ExtensionRemovedListener> m_xRemoveListener;
+
+    TheExtensionManager      *m_pManager;
+    //This mutex is used for synchronizing access to m_vEntries.
+    //Currently it is used to synchronize adding, removing entries and
+    //functions like getItemName, getItemDescription, etc. to prevent
+    //that m_vEntries is accessed at an invalid index.
+    //ToDo: There are many more places where m_vEntries is read and which may
+    //fail. For example the Paint method is probable called from the main thread
+    //while new entries are added / removed in a separate thread.
+    mutable ::osl::Mutex    m_entriesMutex;
+    std::vector< TEntry_Impl > m_vEntries;
+    std::vector< TEntry_Impl > m_vRemovedEntries;
+
+    std::unique_ptr<css::lang::Locale> m_pLocale;
+    std::unique_ptr<CollatorWrapper>   m_pCollator;
+
+    //Holds weak references to extensions to which is we have added an XEventListener
+    std::vector< css::uno::WeakReference<
+        css::deployment::XPackage> > m_vListenerAdded;
+
+    std::unique_ptr<weld::ScrolledWindow> m_xScrollBar;
+
+    //Removes the dead weak references from m_vListenerAdded
+    void cleanVecListenerAdded();
+    void addEventListenerOnce(css::uno::Reference<css::deployment::XPackage> const & extension);
+
+    void CalcActiveHeight( const tools::Long nPos );
+    tools::Long GetTotalHeight() const;
+    void SetupScrollBar();
+    void DrawRow(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect, const TEntry_Impl& rEntry);
+    bool HandleCursorKey( sal_uInt16 nKeyCode );
+    bool FindEntryPos( const TEntry_Impl& rEntry, tools::Long nStart, tools::Long nEnd, tools::Long &nFound );
+    void DeleteRemoved();
+
+    DECL_LINK( ScrollHdl, weld::ScrolledWindow&, void );
+
+    void Init();
+public:
+    explicit ExtensionBox_Impl(std::unique_ptr<weld::ScrolledWindow> xScroll);
+    virtual ~ExtensionBox_Impl() override;
+
+    virtual bool MouseButtonDown( const MouseEvent& rMEvt ) override;
+    virtual bool MouseMove( const MouseEvent& rMEvt ) override;
+    virtual bool KeyInput(const KeyEvent& rKEvt) override;
+    virtual void Paint( vcl::RenderContext& rRenderContext, const tools::Rectangle &rPaintRect ) override;
+    virtual void Resize() override;
+    virtual OUString RequestHelp(tools::Rectangle& rRect) override;
+
+    virtual void SetDrawingArea(weld::DrawingArea* pDrawingArea) override;
+
+    TEntry_Impl const & GetEntryData( tools::Long nPos ) { return m_vEntries[ nPos ]; }
+    tools::Long            GetEntryCount() const { return static_cast<tools::Long>(m_vEntries.size()); }
+    tools::Rectangle       GetEntryRect( const tools::Long nPos ) const;
+    bool            HasActive() const { return m_bHasActive; }
+    tools::Long            PointToPos( const Point& rPos );
+    virtual void    RecalcAll();
+    void            RemoveUnlocked();
+
+
+    virtual void selectEntry( const tools::Long nPos );
+    void addEntry(const css::uno::Reference<css::deployment::XPackage> &xPackage,
+                              bool bLicenseMissing = false );
+    void updateEntry(const css::uno::Reference<css::deployment::XPackage> &xPackage );
+    void removeEntry(const css::uno::Reference<css::deployment::XPackage> &xPackage );
+
+    void prepareChecking();
+    void checkEntries();
+
+    void setExtensionManager(TheExtensionManager* pManager) { m_pManager = pManager; }
+
+    //These functions are used for automatic testing
+public:
+    enum { ENTRY_NOTFOUND = -1 };
+
+    /** @return  The count of the entries in the list box. */
+    sal_Int32 getItemCount() const;
+
+    /** @return  The index of the first selected entry in the list box.
+        When nothing is selected, which is the case when getItemCount returns '0',
+        then this function returns ENTRY_NOTFOUND */
+    /** @return  The index of the first selected entry in the list box.
+        When nothing is selected, which is the case when getItemCount returns '0',
+        then this function returns ENTRY_NOTFOUND */
+    sal_Int32 getSelIndex() const;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_service.cxx b/desktop/source/deployment/gui/dp_gui_service.cxx
new file mode 100644
index 000000000..c359cb750
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_service.cxx
@@ -0,0 +1,316 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <memory>
+#include "dp_gui_theextmgr.hxx"
+#include <osl/diagnose.h>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <unotools/configmgr.hxx>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/unwrapargs.hxx>
+#include <unotools/resmgr.hxx>
+#include <vcl/weld.hxx>
+#include <vcl/window.hxx>
+#include <vcl/svapp.hxx>
+#include <com/sun/star/task/XJobExecutor.hpp>
+#include <com/sun/star/ui/dialogs/XAsynchronousExecutableDialog.hpp>
+
+#include <optional>
+#include "license_dialog.hxx"
+#include "dp_gui_dialog2.hxx"
+#include "dp_gui_extensioncmdqueue.hxx"
+#include <dp_misc.h>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_gui {
+
+namespace {
+
+class MyApp : public Application
+{
+public:
+    MyApp();
+
+    MyApp(const MyApp&) = delete;
+    const MyApp& operator=(const MyApp&) = delete;
+
+    // Application
+    virtual int Main() override;
+    virtual void DeInit() override;
+};
+
+}
+
+MyApp::MyApp()
+{
+}
+
+
+int MyApp::Main()
+{
+    return EXIT_SUCCESS;
+}
+
+void MyApp::DeInit()
+{
+    css::uno::Reference< css::uno::XComponentContext > context(
+        comphelper::getProcessComponentContext());
+    dp_misc::disposeBridges(context);
+    css::uno::Reference< css::lang::XComponent >(
+        context, css::uno::UNO_QUERY_THROW)->dispose();
+    comphelper::setProcessServiceFactory(nullptr);
+}
+
+static OUString ReplaceProductNameHookProc( const OUString& rStr )
+{
+    if (rStr.indexOf( "%PRODUCT" ) == -1)
+        return rStr;
+
+    static const OUString sProductName = utl::ConfigManager::getProductName();
+    static const OUString sVersion = utl::ConfigManager::getProductVersion();
+    static const OUString sAboutBoxVersion = utl::ConfigManager::getAboutBoxProductVersion();
+    static const OUString sAboutBoxVersionSuffix = utl::ConfigManager::getAboutBoxProductVersionSuffix();
+    static const OUString sExtension = utl::ConfigManager::getProductExtension();
+    static const OUString sOOOVendor = utl::ConfigManager::getVendor();
+
+    OUString sRet = rStr.replaceAll( "%PRODUCTNAME", sProductName );
+    sRet = sRet.replaceAll( "%PRODUCTVERSION", sVersion );
+    sRet = sRet.replaceAll( "%ABOUTBOXPRODUCTVERSIONSUFFIX", sAboutBoxVersionSuffix );
+    sRet = sRet.replaceAll( "%ABOUTBOXPRODUCTVERSION", sAboutBoxVersion );
+    sRet = sRet.replaceAll( "%OOOVENDOR", sOOOVendor );
+    sRet = sRet.replaceAll( "%PRODUCTEXTENSION", sExtension );
+    return sRet;
+}
+
+namespace {
+
+class ServiceImpl
+    : public ::cppu::WeakImplHelper<ui::dialogs::XAsynchronousExecutableDialog,
+                                     task::XJobExecutor, css::lang::XServiceInfo>
+{
+    Reference<XComponentContext> const m_xComponentContext;
+    std::optional< Reference<awt::XWindow> > /* const */ m_parent;
+    std::optional<OUString> m_extensionURL;
+    OUString m_initialTitle;
+    bool m_bShowUpdateOnly;
+
+public:
+    ServiceImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XAsynchronousExecutableDialog
+    virtual void SAL_CALL setDialogTitle( OUString const & aTitle ) override;
+    virtual void SAL_CALL startExecuteModal(
+        Reference< ui::dialogs::XDialogClosedListener > const & xListener ) override;
+
+    // XJobExecutor
+    virtual void SAL_CALL trigger( OUString const & event ) override;
+};
+
+}
+
+ServiceImpl::ServiceImpl( Sequence<Any> const& args,
+                          Reference<XComponentContext> const& xComponentContext)
+    : m_xComponentContext(xComponentContext),
+      m_bShowUpdateOnly( false )
+{
+    /* if true then this service is running in a unopkg process and not in an office process */
+    std::optional<OUString> view;
+    try {
+        std::optional<sal_Bool> unopkg;
+        comphelper::unwrapArgs( args, m_parent, view, unopkg );
+        return;
+    } catch ( const css::lang::IllegalArgumentException & ) {
+    }
+    try {
+        comphelper::unwrapArgs( args, m_extensionURL);
+    } catch ( const css::lang::IllegalArgumentException & ) {
+    }
+
+    ResHookProc pProc = Translate::GetReadStringHook();
+    if ( !pProc )
+        Translate::SetReadStringHook(ReplaceProductNameHookProc);
+}
+
+// XServiceInfo
+OUString ServiceImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.ui.PackageManagerDialog";
+}
+
+sal_Bool ServiceImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > ServiceImpl::getSupportedServiceNames()
+{
+    return { "com.sun.star.deployment.ui.PackageManagerDialog" };
+}
+
+// XAsynchronousExecutableDialog
+
+void ServiceImpl::setDialogTitle( OUString const & title )
+{
+    if ( dp_gui::TheExtensionManager::s_ExtMgr.is() )
+    {
+        const SolarMutexGuard guard;
+        ::rtl::Reference< ::dp_gui::TheExtensionManager > dialog(
+            ::dp_gui::TheExtensionManager::get( m_xComponentContext,
+                                                m_parent ? *m_parent : Reference<awt::XWindow>(),
+                                                m_extensionURL ? *m_extensionURL : OUString() ) );
+        dialog->SetText( title );
+    }
+    else
+        m_initialTitle = title;
+}
+
+
+void ServiceImpl::startExecuteModal(
+    Reference< ui::dialogs::XDialogClosedListener > const & xListener )
+{
+    bool bCloseDialog = true;  // only used if m_bShowUpdateOnly is true
+    std::unique_ptr<Application> app;
+    //ToDo: synchronize access to s_dialog !!!
+    if (! dp_gui::TheExtensionManager::s_ExtMgr.is())
+    {
+        const bool bAppUp = (GetpApp() != nullptr);
+        bool bOfficePipePresent;
+        try {
+            bOfficePipePresent = dp_misc::office_is_running();
+        }
+        catch (const Exception & exc) {
+            if (bAppUp) {
+                const SolarMutexGuard guard;
+                vcl::Window* pWin = Application::GetActiveTopWindow();
+                std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(pWin ? pWin->GetFrameWeld() : nullptr,
+                                                          VclMessageType::Warning, VclButtonsType::Ok, exc.Message));
+                xBox->run();
+            }
+            throw;
+        }
+
+        if (! bOfficePipePresent) {
+            OSL_ASSERT( ! bAppUp );
+            app.reset( new MyApp );
+            if (! InitVCL() )
+                throw RuntimeException( "Cannot initialize VCL!",
+                                        static_cast<OWeakObject *>(this) );
+            Application::SetDisplayName(
+                utl::ConfigManager::getProductName() +
+                " " +
+                utl::ConfigManager::getProductVersion());
+            ExtensionCmdQueue::syncRepositories( m_xComponentContext );
+        }
+    }
+    else
+    {
+        // When m_bShowUpdateOnly is set, we are inside the office and the user clicked
+        // the update notification icon in the menu bar. We must not close the extensions
+        // dialog after displaying the update dialog when it has been visible before
+        if ( m_bShowUpdateOnly )
+            bCloseDialog = ! dp_gui::TheExtensionManager::s_ExtMgr->isVisible();
+    }
+
+    {
+        const SolarMutexGuard guard;
+        ::rtl::Reference< ::dp_gui::TheExtensionManager > myExtMgr(
+            ::dp_gui::TheExtensionManager::get(
+                m_xComponentContext,
+                m_parent ? *m_parent : Reference<awt::XWindow>(),
+                m_extensionURL ? *m_extensionURL : OUString() ) );
+        myExtMgr->createDialog( false );
+        if (!m_initialTitle.isEmpty()) {
+            myExtMgr->SetText( m_initialTitle );
+            m_initialTitle.clear();
+        }
+        if ( m_bShowUpdateOnly )
+        {
+            myExtMgr->checkUpdates();
+            if ( bCloseDialog )
+                myExtMgr->Close();
+            else
+                myExtMgr->ToTop();
+        }
+        else
+        {
+            myExtMgr->Show();
+            myExtMgr->ToTop();
+        }
+    }
+
+    if (app != nullptr)
+    {
+        Application::Execute();
+        DeInitVCL();
+    }
+
+    if (xListener.is())
+        xListener->dialogClosed(
+            ui::dialogs::DialogClosedEvent(
+                static_cast< ::cppu::OWeakObject * >(this),
+                sal_Int16(0)) );
+}
+
+// XJobExecutor
+
+void ServiceImpl::trigger( OUString const &rEvent )
+{
+    if ( rEvent == "SHOW_UPDATE_DIALOG" )
+        m_bShowUpdateOnly = true;
+    else
+        m_bShowUpdateOnly = false;
+
+    startExecuteModal( Reference< ui::dialogs::XDialogClosedListener >() );
+}
+
+} // namespace dp_gui
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_LicenseDialog_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_gui::LicenseDialog(args, context));
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_ServiceImpl_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_gui::ServiceImpl(args, context));
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_UpdateRequiredDialogService_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_gui::UpdateRequiredDialogService(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_theextmgr.cxx b/desktop/source/deployment/gui/dp_gui_theextmgr.cxx
new file mode 100644
index 000000000..5ee3f53c6
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_theextmgr.cxx
@@ -0,0 +1,537 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <utility>
+#include <vcl/svapp.hxx>
+
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/frame/TerminationVetoException.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <comphelper/propertysequence.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <osl/diagnose.h>
+#include <tools/diagnose_ex.h>
+
+#include "dp_gui_dialog2.hxx"
+#include "dp_gui_extensioncmdqueue.hxx"
+#include "dp_gui_theextmgr.hxx"
+#include <dp_misc.h>
+#include <dp_update.hxx>
+
+constexpr OUStringLiteral USER_PACKAGE_MANAGER = u"user";
+constexpr OUStringLiteral SHARED_PACKAGE_MANAGER = u"shared";
+
+using namespace ::com::sun::star;
+
+namespace dp_gui {
+
+
+::rtl::Reference< TheExtensionManager > TheExtensionManager::s_ExtMgr;
+
+
+//                             TheExtensionManager
+
+
+TheExtensionManager::TheExtensionManager( uno::Reference< awt::XWindow > xParent,
+                                          const uno::Reference< uno::XComponentContext > &xContext ) :
+    m_xContext( xContext ),
+    m_xParent(std::move( xParent )),
+    m_bModified(false),
+    m_bExtMgrDialogExecuting(false)
+{
+    m_xExtensionManager = deployment::ExtensionManager::get( xContext );
+    m_xExtensionManager->addModifyListener( this );
+
+    uno::Reference< lang::XMultiServiceFactory > xConfig(
+        configuration::theDefaultProvider::get(xContext));
+    uno::Sequence<uno::Any> args(comphelper::InitAnyPropertySequence(
+    {
+        {"nodepath", uno::Any(OUString("/org.openoffice.Office.OptionsDialog/Nodes"))}
+    }));
+    m_xNameAccessNodes.set(
+        xConfig->createInstanceWithArguments( "com.sun.star.configuration.ConfigurationAccess", args),
+        uno::UNO_QUERY_THROW);
+
+    // get the 'get more extensions here' url
+    uno::Sequence<uno::Any> args2(comphelper::InitAnyPropertySequence(
+    {
+        {"nodepath", uno::Any(OUString("/org.openoffice.Office.ExtensionManager/ExtensionRepositories"))}
+    }));
+    uno::Reference< container::XNameAccess > xNameAccessRepositories;
+    xNameAccessRepositories.set(
+        xConfig->createInstanceWithArguments( "com.sun.star.configuration.ConfigurationAccess", args2),
+        uno::UNO_QUERY_THROW);
+    try
+    {   //throws css::container::NoSuchElementException, css::lang::WrappedTargetException
+        uno::Any value = xNameAccessRepositories->getByName("WebsiteLink");
+        m_sGetExtensionsURL = value.get< OUString > ();
+     }
+    catch ( const uno::Exception& )
+    {}
+
+    if ( dp_misc::office_is_running() )
+    {
+        // the registration should be done after the construction has been ended
+        // otherwise an exception prevents object creation, but it is registered as a listener
+        m_xDesktop.set( frame::Desktop::create(xContext), uno::UNO_SET_THROW );
+        m_xDesktop->addTerminateListener( this );
+    }
+}
+
+TheExtensionManager::~TheExtensionManager()
+{
+    if (m_xUpdReqDialog)
+        m_xUpdReqDialog->response(RET_CANCEL);
+    assert(!m_xUpdReqDialog);
+    if (m_xExtMgrDialog)
+    {
+        if (m_bExtMgrDialogExecuting)
+            m_xExtMgrDialog->response(RET_CANCEL);
+        else
+        {
+            m_xExtMgrDialog->Close();
+            m_xExtMgrDialog.reset();
+        }
+    }
+    assert(!m_xExtMgrDialog);
+}
+
+void TheExtensionManager::createDialog( const bool bCreateUpdDlg )
+{
+    const SolarMutexGuard guard;
+
+    if ( bCreateUpdDlg )
+    {
+        if ( !m_xUpdReqDialog )
+        {
+            m_xUpdReqDialog.reset(new UpdateRequiredDialog(Application::GetFrameWeld(m_xParent), this));
+            m_xExecuteCmdQueue.reset( new ExtensionCmdQueue( m_xUpdReqDialog.get(), this, m_xContext ) );
+            createPackageList();
+        }
+    }
+    else if ( !m_xExtMgrDialog )
+    {
+        m_xExtMgrDialog = std::make_shared<ExtMgrDialog>(Application::GetFrameWeld(m_xParent), this);
+        m_xExecuteCmdQueue.reset( new ExtensionCmdQueue( m_xExtMgrDialog.get(), this, m_xContext ) );
+        m_xExtMgrDialog->setGetExtensionsURL( m_sGetExtensionsURL );
+        createPackageList();
+    }
+}
+
+void TheExtensionManager::Show()
+{
+    const SolarMutexGuard guard;
+
+    m_bExtMgrDialogExecuting = true;
+
+    weld::DialogController::runAsync(m_xExtMgrDialog, [this](sal_Int32 /*nResult*/) {
+        m_bExtMgrDialogExecuting = false;
+        auto xExtMgrDialog = m_xExtMgrDialog;
+        m_xExtMgrDialog.reset();
+        xExtMgrDialog->Close();
+    });
+}
+
+void TheExtensionManager::SetText( const OUString &rTitle )
+{
+    const SolarMutexGuard guard;
+
+    getDialog()->set_title( rTitle );
+}
+
+
+void TheExtensionManager::ToTop()
+{
+    const SolarMutexGuard guard;
+
+    getDialog()->present();
+}
+
+void TheExtensionManager::Close()
+{
+    if (m_xExtMgrDialog)
+    {
+        if (m_bExtMgrDialogExecuting)
+            m_xExtMgrDialog->response(RET_CANCEL);
+        else
+            m_xExtMgrDialog->Close();
+    }
+    else if (m_xUpdReqDialog)
+        m_xUpdReqDialog->response(RET_CANCEL);
+}
+
+sal_Int16 TheExtensionManager::execute()
+{
+    sal_Int16 nRet = 0;
+
+    if ( m_xUpdReqDialog )
+    {
+        nRet = m_xUpdReqDialog->run();
+        m_xUpdReqDialog.reset();
+    }
+
+    return nRet;
+}
+
+bool TheExtensionManager::isVisible()
+{
+    weld::Window* pDialog = getDialog();
+    return pDialog && pDialog->get_visible();
+}
+
+void TheExtensionManager::checkUpdates()
+{
+    std::vector< uno::Reference< deployment::XPackage >  > vEntries;
+    uno::Sequence< uno::Sequence< uno::Reference< deployment::XPackage > > > xAllPackages;
+
+    try {
+        xAllPackages = m_xExtensionManager->getAllExtensions( uno::Reference< task::XAbortChannel >(),
+                                                              uno::Reference< ucb::XCommandEnvironment >() );
+    } catch ( const deployment::DeploymentException & ) {
+        return;
+    } catch ( const ucb::CommandFailedException & ) {
+        return;
+    } catch ( const ucb::CommandAbortedException & ) {
+        return;
+    } catch ( const lang::IllegalArgumentException & e ) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw css::lang::WrappedTargetRuntimeException( e.Message,
+                        e.Context, anyEx );
+    }
+
+    for ( auto const & i : std::as_const(xAllPackages) )
+    {
+        uno::Reference< deployment::XPackage > xPackage = dp_misc::getExtensionWithHighestVersion(i);
+        OSL_ASSERT(xPackage.is());
+        if ( xPackage.is() )
+        {
+            vEntries.push_back( xPackage );
+        }
+    }
+
+    m_xExecuteCmdQueue->checkForUpdates( std::move(vEntries) );
+}
+
+
+bool TheExtensionManager::installPackage( const OUString &rPackageURL, bool bWarnUser )
+{
+    if ( rPackageURL.isEmpty() )
+        return false;
+
+    createDialog( false );
+
+    bool bInstall = true;
+    bool bInstallForAll = false;
+
+    // DV! missing function is read only repository from extension manager
+    if ( !bWarnUser && ! m_xExtensionManager->isReadOnlyRepository( SHARED_PACKAGE_MANAGER ) )
+        bInstall = getDialogHelper()->installForAllUsers( bInstallForAll );
+
+    if ( !bInstall )
+        return false;
+
+    if ( bInstallForAll )
+        m_xExecuteCmdQueue->addExtension( rPackageURL, SHARED_PACKAGE_MANAGER, false );
+    else
+        m_xExecuteCmdQueue->addExtension( rPackageURL, USER_PACKAGE_MANAGER, bWarnUser );
+
+    return true;
+}
+
+
+void TheExtensionManager::terminateDialog()
+{
+    if (  dp_misc::office_is_running() )
+        return;
+
+    const SolarMutexGuard guard;
+    if (m_xExtMgrDialog)
+    {
+        if (m_bExtMgrDialogExecuting)
+            m_xExtMgrDialog->response(RET_CANCEL);
+        else
+        {
+            m_xExtMgrDialog->Close();
+            m_xExtMgrDialog.reset();
+        }
+    }
+    assert(!m_xExtMgrDialog);
+    if (m_xUpdReqDialog)
+        m_xUpdReqDialog->response(RET_CANCEL);
+    assert(!m_xUpdReqDialog);
+    Application::Quit();
+}
+
+
+void TheExtensionManager::createPackageList()
+{
+    uno::Sequence< uno::Sequence< uno::Reference< deployment::XPackage > > > xAllPackages;
+
+    try {
+        xAllPackages = m_xExtensionManager->getAllExtensions( uno::Reference< task::XAbortChannel >(),
+                                                              uno::Reference< ucb::XCommandEnvironment >() );
+    } catch ( const deployment::DeploymentException & ) {
+        return;
+    } catch ( const ucb::CommandFailedException & ) {
+        return;
+    } catch ( const ucb::CommandAbortedException & ) {
+        return;
+    } catch ( const lang::IllegalArgumentException & e ) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw css::lang::WrappedTargetRuntimeException( e.Message,
+                        e.Context, anyEx );
+    }
+
+    for ( uno::Sequence< uno::Reference< deployment::XPackage > > const & xPackageList : std::as_const(xAllPackages) )
+    {
+        for ( uno::Reference< deployment::XPackage > const & xPackage : xPackageList )
+        {
+            if ( xPackage.is() )
+            {
+                PackageState eState = getPackageState( xPackage );
+                getDialogHelper()->addPackageToList( xPackage );
+                // When the package is enabled, we can stop here, otherwise we have to look for
+                // another version of this package
+                if ( ( eState == REGISTERED ) || ( eState == NOT_AVAILABLE ) )
+                    break;
+            }
+        }
+    }
+
+    const uno::Sequence< uno::Reference< deployment::XPackage > > xNoLicPackages = m_xExtensionManager->getExtensionsWithUnacceptedLicenses( SHARED_PACKAGE_MANAGER,
+                                                                               uno::Reference< ucb::XCommandEnvironment >() );
+    for ( uno::Reference< deployment::XPackage > const & xPackage : xNoLicPackages )
+    {
+        if ( xPackage.is() )
+        {
+            getDialogHelper()->addPackageToList( xPackage, true );
+        }
+    }
+}
+
+
+PackageState TheExtensionManager::getPackageState( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    try {
+        beans::Optional< beans::Ambiguous< sal_Bool > > option(
+            xPackage->isRegistered( uno::Reference< task::XAbortChannel >(),
+                                    uno::Reference< ucb::XCommandEnvironment >() ) );
+        if ( option.IsPresent )
+        {
+            ::beans::Ambiguous< sal_Bool > const & reg = option.Value;
+            if ( reg.IsAmbiguous )
+                return AMBIGUOUS;
+            else
+                return reg.Value ? REGISTERED : NOT_REGISTERED;
+        }
+        else
+            return NOT_AVAILABLE;
+    }
+    catch ( const uno::RuntimeException & ) {
+        throw;
+    }
+    catch (const uno::Exception &) {
+        TOOLS_WARN_EXCEPTION( "desktop", "" );
+        return NOT_AVAILABLE;
+    }
+}
+
+
+bool TheExtensionManager::isReadOnly( const uno::Reference< deployment::XPackage > &xPackage ) const
+{
+    if ( m_xExtensionManager.is() && xPackage.is() )
+    {
+        return m_xExtensionManager->isReadOnlyRepository( xPackage->getRepositoryName() );
+    }
+    else
+        return true;
+}
+
+
+// The function investigates if the extension supports options.
+bool TheExtensionManager::supportsOptions( const uno::Reference< deployment::XPackage > &xPackage ) const
+{
+    bool bOptions = false;
+
+    if ( ! xPackage->isBundle() )
+        return false;
+
+    beans::Optional< OUString > aId = xPackage->getIdentifier();
+
+    //a bundle must always have an id
+    OSL_ASSERT( aId.IsPresent );
+
+    //iterate over all available nodes
+    const uno::Sequence< OUString > seqNames = m_xNameAccessNodes->getElementNames();
+
+    for ( OUString const & nodeName : seqNames )
+    {
+        uno::Any anyNode = m_xNameAccessNodes->getByName( nodeName );
+        //If we have a node then it must contain the set of leaves. This is part of OptionsDialog.xcs
+        uno::Reference< XInterface> xIntNode = anyNode.get< uno::Reference< XInterface > >();
+        uno::Reference< container::XNameAccess > xNode( xIntNode, uno::UNO_QUERY_THROW );
+
+        uno::Any anyLeaves = xNode->getByName("Leaves");
+        uno::Reference< XInterface > xIntLeaves = anyLeaves.get< uno::Reference< XInterface > >();
+        uno::Reference< container::XNameAccess > xLeaves( xIntLeaves, uno::UNO_QUERY_THROW );
+
+        //iterate over all available leaves
+        const uno::Sequence< OUString > seqLeafNames = xLeaves->getElementNames();
+        for ( OUString const & leafName : seqLeafNames )
+        {
+            uno::Any anyLeaf = xLeaves->getByName( leafName );
+            uno::Reference< XInterface > xIntLeaf = anyLeaf.get< uno::Reference< XInterface > >();
+            uno::Reference< beans::XPropertySet > xLeaf( xIntLeaf, uno::UNO_QUERY_THROW );
+            //investigate the Id property if it matches the extension identifier which
+            //has been passed in.
+            uno::Any anyValue = xLeaf->getPropertyValue("Id");
+
+            OUString sId = anyValue.get< OUString >();
+            if ( sId == aId.Value )
+            {
+                bOptions = true;
+                break;
+            }
+        }
+        if ( bOptions )
+            break;
+    }
+    return bOptions;
+}
+
+
+// XEventListener
+void TheExtensionManager::disposing( lang::EventObject const & rEvt )
+{
+    bool shutDown = (rEvt.Source == m_xDesktop);
+
+    if ( shutDown && m_xDesktop.is() )
+    {
+        m_xDesktop->removeTerminateListener( this );
+        m_xDesktop.clear();
+    }
+
+    if ( !shutDown )
+        return;
+
+    if ( dp_misc::office_is_running() )
+    {
+        const SolarMutexGuard guard;
+        if (m_xExtMgrDialog)
+        {
+            if (m_bExtMgrDialogExecuting)
+                m_xExtMgrDialog->response(RET_CANCEL);
+            else
+            {
+                m_xExtMgrDialog->Close();
+                m_xExtMgrDialog.reset();
+            }
+        }
+        assert(!m_xExtMgrDialog);
+        if (m_xUpdReqDialog)
+            m_xUpdReqDialog->response(RET_CANCEL);
+        assert(!m_xUpdReqDialog);
+    }
+    s_ExtMgr.clear();
+}
+
+// XTerminateListener
+void TheExtensionManager::queryTermination( ::lang::EventObject const & )
+{
+    DialogHelper *pDialogHelper = getDialogHelper();
+
+    if ( m_xExecuteCmdQueue->isBusy() || ( pDialogHelper && pDialogHelper->isBusy() ) )
+    {
+        ToTop();
+        throw frame::TerminationVetoException(
+            "The office cannot be closed while the Extension Manager is running",
+            static_cast<frame::XTerminateListener*>(this));
+    }
+    else
+    {
+        clearModified();
+        if (m_xExtMgrDialog)
+        {
+            if (m_bExtMgrDialogExecuting)
+                m_xExtMgrDialog->response(RET_CANCEL);
+            else
+            {
+                m_xExtMgrDialog->Close();
+                m_xExtMgrDialog.reset();
+            }
+        }
+        if (m_xUpdReqDialog)
+            m_xUpdReqDialog->response(RET_CANCEL);
+    }
+}
+
+void TheExtensionManager::notifyTermination( ::lang::EventObject const & rEvt )
+{
+    disposing( rEvt );
+}
+
+// XModifyListener
+void TheExtensionManager::modified( ::lang::EventObject const & /*rEvt*/ )
+{
+    m_bModified = true;
+    DialogHelper *pDialogHelper = getDialogHelper();
+    if (!pDialogHelper)
+        return;
+    pDialogHelper->prepareChecking();
+    createPackageList();
+    pDialogHelper->checkEntries();
+}
+
+
+::rtl::Reference< TheExtensionManager > TheExtensionManager::get( const uno::Reference< uno::XComponentContext > &xContext,
+                                                                  const uno::Reference< awt::XWindow > &xParent,
+                                                                  const OUString & extensionURL )
+{
+    if ( s_ExtMgr.is() )
+    {
+        OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
+        if ( !extensionURL.isEmpty() )
+            s_ExtMgr->installPackage( extensionURL, true );
+        return s_ExtMgr;
+    }
+
+    ::rtl::Reference<TheExtensionManager> that( new TheExtensionManager( xParent, xContext ) );
+
+    const SolarMutexGuard guard;
+    if ( ! s_ExtMgr.is() )
+    {
+        OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
+        s_ExtMgr = that;
+    }
+
+    if ( !extensionURL.isEmpty() )
+        s_ExtMgr->installPackage( extensionURL, true );
+
+    return s_ExtMgr;
+}
+
+} //namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_theextmgr.hxx b/desktop/source/deployment/gui/dp_gui_theextmgr.hxx
new file mode 100644
index 000000000..13c329d6d
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_theextmgr.hxx
@@ -0,0 +1,127 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <cppuhelper/implbase.hxx>
+
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/deployment/XExtensionManager.hpp>
+#include <com/sun/star/frame/XDesktop2.hpp>
+#include <com/sun/star/frame/XTerminateListener.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/util/XModifyListener.hpp>
+
+#include "dp_gui.h"
+#include "dp_gui_dialog2.hxx"
+
+
+namespace dp_gui {
+
+
+class ExtensionCmdQueue;
+
+
+class TheExtensionManager :
+    public ::cppu::WeakImplHelper< css::frame::XTerminateListener,
+                                    css::util::XModifyListener >
+{
+private:
+    css::uno::Reference< css::uno::XComponentContext >        m_xContext;
+    css::uno::Reference< css::frame::XDesktop2 >              m_xDesktop;
+    css::uno::Reference< css::deployment::XExtensionManager > m_xExtensionManager;
+    css::uno::Reference< css::container::XNameAccess >        m_xNameAccessNodes;
+    css::uno::Reference< css::awt::XWindow >                  m_xParent;
+    std::shared_ptr<ExtMgrDialog> m_xExtMgrDialog;
+    std::unique_ptr<UpdateRequiredDialog> m_xUpdReqDialog;
+    std::unique_ptr<ExtensionCmdQueue> m_xExecuteCmdQueue;
+
+    OUString                     m_sGetExtensionsURL;
+    bool                         m_bModified;
+    bool                         m_bExtMgrDialogExecuting;
+
+public:
+    static ::rtl::Reference<TheExtensionManager> s_ExtMgr;
+
+         TheExtensionManager( css::uno::Reference< css::awt::XWindow > xParent,
+                              const css::uno::Reference< css::uno::XComponentContext > &xContext );
+        virtual ~TheExtensionManager() override;
+
+    void createDialog( const bool bCreateUpdDlg );
+    sal_Int16 execute();
+
+    bool isModified() const { return m_bModified; }
+    void clearModified() { m_bModified = false; }
+
+    weld::Window* getDialog()
+    {
+        if (m_xExtMgrDialog)
+            return m_xExtMgrDialog->getDialog();
+        if (m_xUpdReqDialog)
+            return m_xUpdReqDialog->getDialog();
+        return nullptr;
+    }
+    DialogHelper* getDialogHelper()
+    {
+        if (m_xExtMgrDialog)
+            return m_xExtMgrDialog.get();
+        return m_xUpdReqDialog.get();
+    }
+    ExtensionCmdQueue* getCmdQueue() const { return m_xExecuteCmdQueue.get(); }
+
+    void SetText( const OUString &rTitle );
+    void Show();
+    void ToTop();
+    void Close();
+    bool isVisible();
+
+
+    void checkUpdates();
+    bool installPackage( const OUString &rPackageURL, bool bWarnUser = false );
+    void createPackageList();
+
+    void terminateDialog();
+
+    // Tools
+    bool supportsOptions( const css::uno::Reference< css::deployment::XPackage > &xPackage ) const;
+    static PackageState getPackageState( const css::uno::Reference< css::deployment::XPackage > &xPackage );
+    const css::uno::Reference< css::uno::XComponentContext >& getContext() const { return m_xContext; }
+    const css::uno::Reference< css::deployment::XExtensionManager >& getExtensionManager() const { return m_xExtensionManager; }
+    bool isReadOnly( const css::uno::Reference< css::deployment::XPackage > &xPackage ) const;
+
+
+    static ::rtl::Reference<TheExtensionManager> get(
+        css::uno::Reference< css::uno::XComponentContext> const & xContext,
+        css::uno::Reference< css::awt::XWindow> const & xParent = nullptr,
+        OUString const & view = OUString() );
+
+    // XEventListener
+    virtual void SAL_CALL disposing( css::lang::EventObject const & evt ) override;
+
+    // XTerminateListener
+    virtual void SAL_CALL queryTermination( css::lang::EventObject const & evt ) override;
+    virtual void SAL_CALL notifyTermination( css::lang::EventObject const & evt ) override;
+
+    // XModifyListener
+    virtual void SAL_CALL modified( css::lang::EventObject const & evt ) override;
+};
+
+} // namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_updatedata.hxx b/desktop/source/deployment/gui/dp_gui_updatedata.hxx
new file mode 100644
index 000000000..efac4c587
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_updatedata.hxx
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#pragma once
+
+#include <sal/config.h>
+#include <rtl/ustring.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+#include <utility>
+
+namespace com::sun::star::deployment {
+        class XPackage;
+}
+namespace com::sun::star::xml::dom {
+        class XNode;
+}
+
+
+namespace dp_gui {
+
+struct UpdateData
+{
+    explicit UpdateData( css::uno::Reference< css::deployment::XPackage > xExt):
+        bIsShared(false), aInstalledPackage(std::move(xExt)) {};
+
+    //When entries added to the listbox then there can be one for the user update and one
+    //for the shared update. However, both list entries will contain the same UpdateData.
+    //isShared is used to indicate which one is used for the shared entry.
+    bool bIsShared;
+
+    //The currently installed extension which is going to be updated. If the extension exist in
+    //multiple repositories then it is the one with the highest version.
+    css::uno::Reference< css::deployment::XPackage > aInstalledPackage;
+
+    //The version of the update
+    OUString updateVersion;
+
+    //For online update
+
+    // The content of the update information.
+    //Only if aUpdateInfo is set then there is an online update available with a better version
+    //than any of the currently installed extensions with the same identifier.
+    css::uno::Reference< css::xml::dom::XNode > aUpdateInfo;
+    //The URL of the locally downloaded extension. It will only be set if there were no errors
+    //during the download
+    OUString sLocalURL;
+    //The URL of the website where the download can be obtained.
+    OUString sWebsiteURL;
+
+    //For local update
+
+    //The locale extension which is used as update for the user or shared repository.
+    //If set then the data for the online update (aUpdateInfo, sLocalURL, sWebsiteURL)
+    //are to be ignored.
+    css::uno::Reference< css::deployment::XPackage >  aUpdateSource;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_updatedialog.cxx b/desktop/source/deployment/gui/dp_gui_updatedialog.cxx
new file mode 100644
index 000000000..2861d7785
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_updatedialog.cxx
@@ -0,0 +1,994 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <sal/config.h>
+
+#include <utility>
+#include <vector>
+
+
+#include <optional>
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/deployment/UpdateInformationProvider.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/deployment/XUpdateInformationProvider.hpp>
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/frame/XDispatch.hpp>
+#include <com/sun/star/frame/XDispatchProvider.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/task/InteractionHandler.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Exception.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/util/URL.hpp>
+#include <com/sun/star/util/URLTransformer.hpp>
+#include <com/sun/star/util/XURLTransformer.hpp>
+#include <com/sun/star/xml/dom/XElement.hpp>
+#include <osl/diagnose.h>
+#include <rtl/ref.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <salhelper/thread.hxx>
+#include <tools/gen.hxx>
+#include <tools/link.hxx>
+#include <unotools/configmgr.hxx>
+#include <vcl/svapp.hxx>
+
+#include <comphelper/processfactory.hxx>
+#include <comphelper/propertyvalue.hxx>
+
+#include <dp_dependencies.hxx>
+#include <dp_descriptioninfoset.hxx>
+#include <dp_identifier.hxx>
+#include <dp_misc.h>
+#include <dp_update.hxx>
+
+#include <strings.hrc>
+#include "dp_gui_updatedata.hxx"
+#include "dp_gui_updatedialog.hxx"
+#include <dp_shared.hxx>
+
+class KeyEvent;
+class MouseEvent;
+namespace com::sun::star::uno {
+    class XComponentContext;
+}
+
+using namespace ::com::sun::star;
+using dp_gui::UpdateDialog;
+
+namespace {
+
+sal_Unicode const LF = 0x000A;
+sal_Unicode const CR = 0x000D;
+
+constexpr OUStringLiteral IGNORED_UPDATES = u"/org.openoffice.Office.ExtensionManager/ExtensionUpdateData/IgnoredUpdates";
+constexpr OUStringLiteral PROPERTY_VERSION = u"Version";
+
+enum Kind { ENABLED_UPDATE, DISABLED_UPDATE, SPECIFIC_ERROR };
+
+OUString confineToParagraph(OUString const & text) {
+    // Confine arbitrary text to a single paragraph in a VclMultiLineEdit
+    // This assumes that U+000A and U+000D are the only paragraph separators in
+    // a VclMultiLineEdit, and that replacing them with a single space
+    // each is acceptable:
+    return text.replace(LF, ' ').replace(CR, ' ');
+}
+}
+
+struct UpdateDialog::DisabledUpdate {
+    OUString                  name;
+    uno::Sequence< OUString > unsatisfiedDependencies;
+    // We also want to show release notes and publisher for disabled updates
+    css::uno::Reference< css::xml::dom::XNode > aUpdateInfo;
+};
+
+struct UpdateDialog::SpecificError {
+    OUString name;
+    OUString message;
+};
+
+
+struct UpdateDialog::IgnoredUpdate {
+    OUString sExtensionID;
+    OUString sVersion;
+
+    IgnoredUpdate( OUString aExtensionID, OUString aVersion );
+};
+
+
+UpdateDialog::IgnoredUpdate::IgnoredUpdate( OUString aExtensionID, OUString aVersion ):
+    sExtensionID(std::move( aExtensionID )),
+    sVersion(std::move( aVersion ))
+{}
+
+
+struct UpdateDialog::Index
+{
+    Kind          m_eKind;
+    bool          m_bIgnored;
+    sal_uInt16    m_nIndex;
+    OUString      m_aName;
+
+    Index( Kind theKind, sal_uInt16 nIndex, OUString aName ) :
+        m_eKind( theKind ),
+        m_bIgnored( false ),
+        m_nIndex( nIndex ),
+        m_aName(std::move( aName )) {}
+};
+
+
+class UpdateDialog::Thread: public salhelper::Thread {
+public:
+    Thread(
+        uno::Reference< uno::XComponentContext > const & context,
+        UpdateDialog & dialog,
+        std::vector< uno::Reference< deployment::XPackage >  > && vExtensionList);
+
+    void stop();
+
+private:
+    virtual ~Thread() override;
+
+    virtual void execute() override;
+
+    void handleSpecificError(
+        uno::Reference< deployment::XPackage > const & package,
+        uno::Any const & exception) const;
+
+    OUString getUpdateDisplayString(
+        dp_gui::UpdateData const & data, std::u16string_view version = std::u16string_view()) const;
+
+    void prepareUpdateData(
+        css::uno::Reference< css::xml::dom::XNode > const & updateInfo,
+        UpdateDialog::DisabledUpdate & out_du,
+        dp_gui::UpdateData & out_data) const;
+
+    bool update(
+        UpdateDialog::DisabledUpdate const & du,
+        dp_gui::UpdateData const & data) const;
+
+    uno::Reference< uno::XComponentContext > m_context;
+    UpdateDialog & m_dialog;
+    std::vector< uno::Reference< deployment::XPackage > > m_vExtensionList;
+    uno::Reference< deployment::XUpdateInformationProvider > m_updateInformation;
+    uno::Reference< task::XInteractionHandler > m_xInteractionHdl;
+
+    // guarded by Application::GetSolarMutex():
+    bool m_stop;
+};
+
+UpdateDialog::Thread::Thread(
+    uno::Reference< uno::XComponentContext > const & context,
+    UpdateDialog & dialog,
+    std::vector< uno::Reference< deployment::XPackage > >&& vExtensionList):
+    salhelper::Thread("dp_gui_updatedialog"),
+    m_context(context),
+    m_dialog(dialog),
+    m_vExtensionList(std::move(vExtensionList)),
+    m_updateInformation(
+        deployment::UpdateInformationProvider::create(context)),
+    m_stop(false)
+{
+    if( m_context.is() )
+    {
+        m_xInteractionHdl =
+            task::InteractionHandler::createWithParent(m_context, dialog.getDialog()->GetXWindow());
+        m_updateInformation->setInteractionHandler( m_xInteractionHdl );
+    }
+}
+
+void UpdateDialog::Thread::stop() {
+    {
+        SolarMutexGuard g;
+        m_stop = true;
+    }
+    m_updateInformation->cancel();
+}
+
+UpdateDialog::Thread::~Thread()
+{
+    if ( m_xInteractionHdl.is() )
+        m_updateInformation->setInteractionHandler( uno::Reference< task::XInteractionHandler > () );
+}
+
+void UpdateDialog::Thread::execute()
+{
+    {
+        SolarMutexGuard g;
+        if ( m_stop ) {
+            return;
+        }
+    }
+    uno::Reference<deployment::XExtensionManager> extMgr =
+        deployment::ExtensionManager::get(m_context);
+
+    std::vector<std::pair<uno::Reference<deployment::XPackage>, uno::Any > > errors;
+
+    dp_misc::UpdateInfoMap updateInfoMap = dp_misc::getOnlineUpdateInfos(
+        m_context, extMgr, m_updateInformation, &m_vExtensionList, errors);
+
+    for (auto const& elem : errors)
+        handleSpecificError(elem.first, elem.second);
+
+    for (auto const& updateInfo : updateInfoMap)
+    {
+        dp_misc::UpdateInfo const & info = updateInfo.second;
+        UpdateData updateData(info.extension);
+        DisabledUpdate disableUpdate;
+        //determine if online updates meet the requirements
+        prepareUpdateData(info.info, disableUpdate, updateData);
+
+        //determine if the update is installed in the user or shared repository
+        OUString sOnlineVersion;
+        if (info.info.is())
+            sOnlineVersion = info.version;
+        OUString sVersionUser;
+        OUString sVersionShared;
+        OUString sVersionBundled;
+        uno::Sequence< uno::Reference< deployment::XPackage> > extensions;
+        try {
+            extensions = extMgr->getExtensionsWithSameIdentifier(
+                dp_misc::getIdentifier(info.extension), info.extension->getName(),
+                uno::Reference<ucb::XCommandEnvironment>());
+        } catch ( const lang::IllegalArgumentException& ) {
+            OSL_ASSERT(false);
+            continue;
+        } catch ( const css::ucb::CommandFailedException& ) {
+            OSL_ASSERT(false);
+            continue;
+        }
+        OSL_ASSERT(extensions.getLength() == 3);
+        if (extensions[0].is() )
+            sVersionUser = extensions[0]->getVersion();
+        if (extensions[1].is() )
+            sVersionShared = extensions[1]->getVersion();
+        if (extensions[2].is() )
+            sVersionBundled = extensions[2]->getVersion();
+
+        bool bSharedReadOnly = extMgr->isReadOnlyRepository("shared");
+
+        dp_misc::UPDATE_SOURCE sourceUser = dp_misc::isUpdateUserExtension(
+            bSharedReadOnly, sVersionUser, sVersionShared, sVersionBundled, sOnlineVersion);
+        dp_misc::UPDATE_SOURCE sourceShared = dp_misc::isUpdateSharedExtension(
+            bSharedReadOnly, sVersionShared, sVersionBundled, sOnlineVersion);
+
+        if (sourceUser != dp_misc::UPDATE_SOURCE_NONE)
+        {
+            if (sourceUser == dp_misc::UPDATE_SOURCE_SHARED)
+            {
+                updateData.aUpdateSource = extensions[1];
+                updateData.updateVersion = extensions[1]->getVersion();
+            }
+            else if (sourceUser == dp_misc::UPDATE_SOURCE_BUNDLED)
+            {
+                updateData.aUpdateSource = extensions[2];
+                updateData.updateVersion = extensions[2]->getVersion();
+            }
+            if (!update(disableUpdate, updateData))
+                return;
+        }
+
+        if (sourceShared != dp_misc::UPDATE_SOURCE_NONE)
+        {
+            if (sourceShared == dp_misc::UPDATE_SOURCE_BUNDLED)
+            {
+                updateData.aUpdateSource = extensions[2];
+                updateData.updateVersion = extensions[2]->getVersion();
+            }
+            updateData.bIsShared = true;
+            if (!update(disableUpdate, updateData))
+                return;
+        }
+    }
+
+
+    SolarMutexGuard g;
+    if (!m_stop) {
+        m_dialog.checkingDone();
+    }
+}
+
+//Parameter package can be null
+void UpdateDialog::Thread::handleSpecificError(
+    uno::Reference< deployment::XPackage > const & package,
+    uno::Any const & exception) const
+{
+    UpdateDialog::SpecificError data;
+    if (package.is())
+        data.name = package->getDisplayName();
+    uno::Exception e;
+    if (exception >>= e) {
+        data.message = e.Message;
+    }
+    SolarMutexGuard g;
+    if (!m_stop) {
+        m_dialog.addSpecificError(data);
+    }
+}
+
+OUString UpdateDialog::Thread::getUpdateDisplayString(
+    dp_gui::UpdateData const & data, std::u16string_view version) const
+{
+    OSL_ASSERT(data.aInstalledPackage.is());
+    OUStringBuffer b(data.aInstalledPackage->getDisplayName());
+    b.append(' ');
+    {
+        SolarMutexGuard g;
+        if(!m_stop)
+            b.append(m_dialog.m_version);
+    }
+    b.append(' ');
+    if (!version.empty())
+        b.append(version);
+    else
+        b.append(data.updateVersion);
+
+    if (!data.sWebsiteURL.isEmpty())
+    {
+        b.append(' ');
+        {
+            SolarMutexGuard g;
+            if(!m_stop)
+                b.append(m_dialog.m_browserbased);
+        }
+    }
+    return  b.makeStringAndClear();
+}
+
+/** out_data will only be filled if all dependencies are ok.
+ */
+void UpdateDialog::Thread::prepareUpdateData(
+    uno::Reference< xml::dom::XNode > const & updateInfo,
+    UpdateDialog::DisabledUpdate & out_du,
+    dp_gui::UpdateData & out_data) const
+{
+    if (!updateInfo.is())
+        return;
+    dp_misc::DescriptionInfoset infoset(m_context, updateInfo);
+    OSL_ASSERT(!infoset.getVersion().isEmpty());
+    uno::Sequence< uno::Reference< xml::dom::XElement > > ds(
+        dp_misc::Dependencies::check(infoset));
+
+    out_du.aUpdateInfo = updateInfo;
+    out_du.unsatisfiedDependencies.realloc(ds.getLength());
+    auto p_unsatisfiedDependencies = out_du.unsatisfiedDependencies.getArray();
+    for (sal_Int32 i = 0; i < ds.getLength(); ++i) {
+        p_unsatisfiedDependencies[i] = dp_misc::Dependencies::getErrorText(ds[i]);
+    }
+
+    const ::std::optional< OUString> updateWebsiteURL(infoset.getLocalizedUpdateWebsiteURL());
+
+    out_du.name = getUpdateDisplayString(out_data, infoset.getVersion());
+
+    if (!out_du.unsatisfiedDependencies.hasElements())
+    {
+        out_data.aUpdateInfo = updateInfo;
+        out_data.updateVersion = infoset.getVersion();
+        if (updateWebsiteURL)
+            out_data.sWebsiteURL = *updateWebsiteURL;
+    }
+}
+
+bool UpdateDialog::Thread::update(
+    UpdateDialog::DisabledUpdate const & du,
+    dp_gui::UpdateData const & data) const
+{
+    bool ret = false;
+    if (!du.unsatisfiedDependencies.hasElements())
+    {
+        SolarMutexGuard g;
+        if (!m_stop) {
+            m_dialog.addEnabledUpdate(getUpdateDisplayString(data), data);
+        }
+        ret = !m_stop;
+    } else {
+        SolarMutexGuard g;
+        if (!m_stop) {
+                m_dialog.addDisabledUpdate(du);
+        }
+        ret = !m_stop;
+    }
+    return ret;
+}
+
+// UpdateDialog ----------------------------------------------------------
+UpdateDialog::UpdateDialog(
+    uno::Reference< uno::XComponentContext > const & context,
+    weld::Window * parent, std::vector<uno::Reference< deployment::XPackage > > && vExtensionList,
+    std::vector< dp_gui::UpdateData > * updateData)
+    : GenericDialogController(parent, "desktop/ui/updatedialog.ui", "UpdateDialog")
+    , m_context(context)
+    , m_none(DpResId(RID_DLG_UPDATE_NONE))
+    , m_noInstallable(DpResId(RID_DLG_UPDATE_NOINSTALLABLE))
+    , m_failure(DpResId(RID_DLG_UPDATE_FAILURE))
+    , m_unknownError(DpResId(RID_DLG_UPDATE_UNKNOWNERROR))
+    , m_noDescription(DpResId(RID_DLG_UPDATE_NODESCRIPTION))
+    , m_noInstall(DpResId(RID_DLG_UPDATE_NOINSTALL))
+    , m_noDependency(DpResId(RID_DLG_UPDATE_NODEPENDENCY))
+    , m_noDependencyCurVer(DpResId(RID_DLG_UPDATE_NODEPENDENCY_CUR_VER))
+    , m_browserbased(DpResId(RID_DLG_UPDATE_BROWSERBASED))
+    , m_version(DpResId(RID_DLG_UPDATE_VERSION))
+    , m_ignoredUpdate(DpResId(RID_DLG_UPDATE_IGNORED_UPDATE))
+    , m_updateData(*updateData)
+    , m_thread(new UpdateDialog::Thread(context, *this, std::move(vExtensionList)))
+    , m_xChecking(m_xBuilder->weld_label("UPDATE_CHECKING"))
+    , m_xThrobber(m_xBuilder->weld_spinner("THROBBER"))
+    , m_xUpdate(m_xBuilder->weld_label("UPDATE_LABEL"))
+    , m_xUpdates(m_xBuilder->weld_tree_view("checklist"))
+    , m_xAll(m_xBuilder->weld_check_button("UPDATE_ALL"))
+    , m_xDescription(m_xBuilder->weld_label("DESCRIPTION_LABEL"))
+    , m_xPublisherLabel(m_xBuilder->weld_label("PUBLISHER_LABEL"))
+    , m_xPublisherLink(m_xBuilder->weld_link_button("PUBLISHER_LINK"))
+    , m_xReleaseNotesLabel(m_xBuilder->weld_label("RELEASE_NOTES_LABEL"))
+    , m_xReleaseNotesLink(m_xBuilder->weld_link_button("RELEASE_NOTES_LINK"))
+    , m_xDescriptions(m_xBuilder->weld_text_view("DESCRIPTIONS"))
+    , m_xOk(m_xBuilder->weld_button("ok"))
+    , m_xClose(m_xBuilder->weld_button("close"))
+    , m_xHelp(m_xBuilder->weld_button("help"))
+{
+    auto nWidth = m_xDescriptions->get_approximate_digit_width() * 62;
+    auto nHeight = m_xDescriptions->get_height_rows(8);
+    m_xDescriptions->set_size_request(nWidth, nHeight);
+    m_xUpdates->set_size_request(nWidth, nHeight);
+
+    m_xUpdates->enable_toggle_buttons(weld::ColumnToggleType::Check);
+
+    OSL_ASSERT(updateData != nullptr);
+
+    m_xExtensionManager = deployment::ExtensionManager::get( context );
+
+    m_xUpdates->connect_changed(LINK(this, UpdateDialog, selectionHandler));
+    m_xUpdates->connect_toggled(LINK(this, UpdateDialog, entryToggled));
+    m_xAll->connect_toggled(LINK(this, UpdateDialog, allHandler));
+    m_xOk->connect_clicked(LINK(this, UpdateDialog, okHandler));
+    m_xClose->connect_clicked(LINK(this, UpdateDialog, closeHandler));
+    if (!dp_misc::office_is_running())
+        m_xHelp->set_sensitive(false);
+
+    initDescription();
+    getIgnoredUpdates();
+}
+
+UpdateDialog::~UpdateDialog()
+{
+}
+
+short UpdateDialog::run() {
+    m_xThrobber->start();
+    m_thread->launch();
+    short nRet = GenericDialogController::run();
+    m_thread->stop();
+    return nRet;
+}
+
+IMPL_LINK(UpdateDialog, entryToggled, const weld::TreeView::iter_col&, rRowCol, void)
+{
+    // error's can't be enabled
+    const UpdateDialog::Index* p = weld::fromId<UpdateDialog::Index const *>(m_xUpdates->get_id(rRowCol.first));
+    if (p->m_eKind == SPECIFIC_ERROR)
+        m_xUpdates->set_toggle(rRowCol.first, TRISTATE_FALSE);
+
+    enableOk();
+}
+
+void UpdateDialog::insertItem(const UpdateDialog::Index *pEntry, bool bEnabledCheckBox)
+{
+    int nEntry = m_xUpdates->n_children();
+    m_xUpdates->append();
+    m_xUpdates->set_toggle(nEntry, bEnabledCheckBox ? TRISTATE_TRUE : TRISTATE_FALSE);
+    m_xUpdates->set_text(nEntry, pEntry->m_aName, 0);
+    m_xUpdates->set_id(nEntry, weld::toId(pEntry));
+}
+
+void UpdateDialog::addAdditional(const UpdateDialog::Index * index, bool bEnabledCheckBox)
+{
+    m_xAll->set_sensitive(true);
+    if (m_xAll->get_active())
+    {
+        insertItem(index, bEnabledCheckBox);
+        m_xUpdate->set_sensitive(true);
+        m_xUpdates->set_sensitive(true);
+        m_xDescription->set_sensitive(true);
+        m_xDescriptions->set_sensitive(true);
+    }
+}
+
+void UpdateDialog::addEnabledUpdate( OUString const & name,
+                                     dp_gui::UpdateData const & data )
+{
+    sal_uInt16 nIndex = sal::static_int_cast< sal_uInt16 >( m_enabledUpdates.size() );
+    UpdateDialog::Index *pEntry = new UpdateDialog::Index( ENABLED_UPDATE, nIndex, name );
+
+    m_enabledUpdates.push_back( data );
+    m_ListboxEntries.emplace_back( pEntry );
+
+    if (!isIgnoredUpdate(pEntry))
+    {
+        insertItem(pEntry, true);
+    }
+    else
+        addAdditional(pEntry, false);
+
+    m_xUpdate->set_sensitive(true);
+    m_xUpdates->set_sensitive(true);
+    m_xDescription->set_sensitive(true);
+    m_xDescriptions->set_sensitive(true);
+}
+
+void UpdateDialog::addDisabledUpdate( UpdateDialog::DisabledUpdate const & data )
+{
+    sal_uInt16 nIndex = sal::static_int_cast< sal_uInt16 >( m_disabledUpdates.size() );
+    UpdateDialog::Index *pEntry = new UpdateDialog::Index( DISABLED_UPDATE, nIndex, data.name );
+
+    m_disabledUpdates.push_back( data );
+    m_ListboxEntries.emplace_back( pEntry );
+
+    isIgnoredUpdate( pEntry );
+    addAdditional(pEntry, false);
+}
+
+void UpdateDialog::addSpecificError( UpdateDialog::SpecificError const & data )
+{
+    sal_uInt16 nIndex = sal::static_int_cast< sal_uInt16 >( m_specificErrors.size() );
+    UpdateDialog::Index *pEntry = new UpdateDialog::Index( SPECIFIC_ERROR, nIndex, data.name );
+
+    m_specificErrors.push_back( data );
+    m_ListboxEntries.emplace_back( pEntry );
+
+    addAdditional(pEntry, false);
+}
+
+void UpdateDialog::checkingDone() {
+    m_xChecking->hide();
+    m_xThrobber->stop();
+    m_xThrobber->hide();
+    if (m_xUpdates->n_children() == 0)
+    {
+        clearDescription();
+        m_xDescription->set_sensitive(true);
+        m_xDescriptions->set_sensitive(true);
+
+        if ( m_disabledUpdates.empty() && m_specificErrors.empty() && m_ignoredUpdates.empty() )
+            showDescription( m_none );
+        else
+            showDescription( m_noInstallable );
+    }
+
+    enableOk();
+}
+
+void UpdateDialog::enableOk() {
+    if (!m_xChecking->get_visible()) {
+        int nChecked = 0;
+        for (int i = 0, nCount = m_xUpdates->n_children(); i < nCount; ++i) {
+            if (m_xUpdates->get_toggle(i) == TRISTATE_TRUE)
+                ++nChecked;
+        }
+        m_xOk->set_sensitive(nChecked != 0);
+    }
+}
+
+// *********************************************************************************
+void UpdateDialog::createNotifyJob( bool bPrepareOnly,
+    uno::Sequence< uno::Sequence< OUString > > const &rItemList )
+{
+    if ( !dp_misc::office_is_running() )
+        return;
+
+    // notify update check job
+    try
+    {
+        uno::Reference< lang::XMultiServiceFactory > xConfigProvider(
+            configuration::theDefaultProvider::get(
+                comphelper::getProcessComponentContext()));
+
+        uno::Sequence< uno::Any > aArgumentList{ uno::Any(comphelper::makePropertyValue(
+            "nodepath",
+            OUString("org.openoffice.Office.Addons/AddonUI/OfficeHelp/UpdateCheckJob"))) };
+
+        uno::Reference< container::XNameAccess > xNameAccess(
+            xConfigProvider->createInstanceWithArguments(
+                "com.sun.star.configuration.ConfigurationAccess", aArgumentList ),
+            uno::UNO_QUERY_THROW );
+
+        util::URL aURL;
+        xNameAccess->getByName("URL") >>= aURL.Complete;
+
+        uno::Reference< uno::XComponentContext > xContext( ::comphelper::getProcessComponentContext() );
+        uno::Reference < util::XURLTransformer > xTransformer = util::URLTransformer::create(xContext);
+
+        xTransformer->parseStrict(aURL);
+
+        uno::Reference < frame::XDesktop2 > xDesktop = frame::Desktop::create( xContext );
+        uno::Reference< frame::XDispatchProvider > xDispatchProvider( xDesktop->getCurrentFrame(),
+            uno::UNO_QUERY_THROW );
+        uno::Reference< frame::XDispatch > xDispatch = xDispatchProvider->queryDispatch(aURL, OUString(), 0);
+
+        if( xDispatch.is() )
+        {
+            uno::Sequence aPropList{ comphelper::makePropertyValue("updateList", rItemList),
+                                     comphelper::makePropertyValue("prepareOnly", bPrepareOnly) };
+
+            xDispatch->dispatch(aURL, aPropList );
+        }
+    }
+    catch( const uno::Exception& e )
+    {
+        dp_misc::TRACE( "Caught exception: "
+            + e.Message + "\n thread terminated.\n\n");
+    }
+}
+
+// *********************************************************************************
+void UpdateDialog::notifyMenubar( bool bPrepareOnly, bool bRecheckOnly )
+{
+    if ( !dp_misc::office_is_running() )
+        return;
+
+    uno::Sequence< uno::Sequence< OUString > > aItemList;
+
+    if ( ! bRecheckOnly )
+    {
+        sal_Int32 nCount = 0;
+        for (sal_uInt16 i = 0, nItemCount = m_xUpdates->n_children(); i < nItemCount; ++i)
+        {
+
+            UpdateDialog::Index const * p = weld::fromId<UpdateDialog::Index const*>(m_xUpdates->get_id(i));
+
+            if ( p->m_eKind == ENABLED_UPDATE )
+            {
+                dp_gui::UpdateData aUpdData = m_enabledUpdates[ p->m_nIndex ];
+
+                dp_misc::DescriptionInfoset aInfoset( m_context, aUpdData.aUpdateInfo );
+                uno::Sequence< OUString > aItem
+                {
+                    dp_misc::getIdentifier( aUpdData.aInstalledPackage ),
+                    aInfoset.getVersion()
+                };
+                aItemList.realloc( nCount + 1 );
+                aItemList.getArray()[ nCount ] = aItem;
+                nCount += 1;
+            }
+            else
+                continue;
+        }
+    }
+
+    createNotifyJob( bPrepareOnly, aItemList );
+}
+
+// *********************************************************************************
+
+void UpdateDialog::initDescription()
+{
+    m_xPublisherLabel->hide();
+    m_xPublisherLink->hide();
+    m_xReleaseNotesLabel->hide();
+    m_xReleaseNotesLink->hide();
+}
+
+void UpdateDialog::clearDescription()
+{
+    m_xPublisherLabel->hide();
+    m_xPublisherLink->hide();
+    m_xPublisherLink->set_label("");
+    m_xPublisherLink->set_uri("");
+    m_xReleaseNotesLabel->hide();
+    m_xReleaseNotesLink->hide();
+    m_xReleaseNotesLink->set_uri( "" );
+    m_xDescriptions->set_text("");
+}
+
+bool UpdateDialog::showDescription(uno::Reference< xml::dom::XNode > const & aUpdateInfo)
+{
+    dp_misc::DescriptionInfoset infoset(m_context, aUpdateInfo);
+    return showDescription(infoset.getLocalizedPublisherNameAndURL(),
+                           infoset.getLocalizedReleaseNotesURL());
+}
+
+bool UpdateDialog::showDescription(uno::Reference< deployment::XPackage > const & aExtension)
+{
+    OSL_ASSERT(aExtension.is());
+    beans::StringPair pubInfo = aExtension->getPublisherInfo();
+    return showDescription(std::make_pair(pubInfo.First, pubInfo.Second),
+                           "");
+}
+
+bool UpdateDialog::showDescription(std::pair< OUString, OUString > const & pairPublisher,
+                                   OUString const & sReleaseNotes)
+{
+    OUString sPub = pairPublisher.first;
+    OUString sURL = pairPublisher.second;
+
+    if ( sPub.isEmpty() && sURL.isEmpty() && sReleaseNotes.isEmpty() )
+        // nothing to show
+        return false;
+
+    if ( !sPub.isEmpty() )
+    {
+        m_xPublisherLabel->show();
+        m_xPublisherLink->show();
+        m_xPublisherLink->set_label(sPub);
+        m_xPublisherLink->set_uri(sURL);
+    }
+
+    if ( !sReleaseNotes.isEmpty() )
+    {
+        m_xReleaseNotesLabel->show();
+        m_xReleaseNotesLink->show();
+        m_xReleaseNotesLink->set_uri( sReleaseNotes );
+    }
+    return true;
+}
+
+bool UpdateDialog::showDescription( const OUString& rDescription)
+{
+    if ( rDescription.isEmpty() )
+        // nothing to show
+        return false;
+
+    m_xDescriptions->set_text(rDescription);
+    return true;
+}
+
+void UpdateDialog::getIgnoredUpdates()
+{
+    uno::Reference< lang::XMultiServiceFactory > xConfig(
+        configuration::theDefaultProvider::get(m_context));
+    beans::NamedValue aValue( "nodepath", uno::Any( OUString(IGNORED_UPDATES) ) );
+    uno::Sequence< uno::Any > args{ uno::Any(aValue) };
+
+    uno::Reference< container::XNameAccess > xNameAccess( xConfig->createInstanceWithArguments( "com.sun.star.configuration.ConfigurationAccess", args), uno::UNO_QUERY_THROW );
+    const uno::Sequence< OUString > aElementNames = xNameAccess->getElementNames();
+
+    for ( OUString const & aIdentifier : aElementNames )
+    {
+        OUString aVersion;
+
+        uno::Any aPropValue( uno::Reference< beans::XPropertySet >( xNameAccess->getByName( aIdentifier ), uno::UNO_QUERY_THROW )->getPropertyValue( PROPERTY_VERSION ) );
+        aPropValue >>= aVersion;
+        IgnoredUpdate *pData = new IgnoredUpdate( aIdentifier, aVersion );
+        m_ignoredUpdates.emplace_back( pData );
+    }
+}
+
+
+bool UpdateDialog::isIgnoredUpdate( UpdateDialog::Index * index )
+{
+    bool bIsIgnored = false;
+
+    if (! m_ignoredUpdates.empty() )
+    {
+        OUString aExtensionID;
+        OUString aVersion;
+
+        if ( index->m_eKind == ENABLED_UPDATE )
+        {
+            dp_gui::UpdateData aUpdData = m_enabledUpdates[ index->m_nIndex ];
+            aExtensionID = dp_misc::getIdentifier( aUpdData.aInstalledPackage );
+            aVersion = aUpdData.updateVersion;
+        }
+        else if ( index->m_eKind == DISABLED_UPDATE )
+        {
+            DisabledUpdate &rData = m_disabledUpdates[ index->m_nIndex ];
+            dp_misc::DescriptionInfoset aInfoset( m_context, rData.aUpdateInfo );
+            ::std::optional< OUString > aID( aInfoset.getIdentifier() );
+            if ( aID )
+                aExtensionID = *aID;
+            aVersion = aInfoset.getVersion();
+        }
+
+        for (auto const& ignoredUpdate : m_ignoredUpdates)
+        {
+            if ( ignoredUpdate->sExtensionID == aExtensionID )
+            {
+                if ( ( !ignoredUpdate->sVersion.isEmpty() ) || ( ignoredUpdate->sVersion == aVersion ) )
+                {
+                    bIsIgnored = true;
+                    index->m_bIgnored = true;
+                }
+                break;
+            }
+        }
+    }
+
+    return bIsIgnored;
+}
+
+
+IMPL_LINK_NOARG(UpdateDialog, selectionHandler, weld::TreeView&, void)
+{
+    OUStringBuffer b;
+    int nSelectedPos = m_xUpdates->get_selected_index();
+    clearDescription();
+
+    const UpdateDialog::Index* p = nullptr;
+    if (nSelectedPos != -1)
+        p = weld::fromId<UpdateDialog::Index const*>(m_xUpdates->get_id(nSelectedPos));
+    if (p != nullptr)
+    {
+        sal_uInt16 pos = p->m_nIndex;
+
+        switch (p->m_eKind)
+        {
+            case ENABLED_UPDATE:
+            {
+                if ( m_enabledUpdates[ pos ].aUpdateSource.is() )
+                    showDescription( m_enabledUpdates[ pos ].aUpdateSource );
+                else
+                    showDescription( m_enabledUpdates[ pos ].aUpdateInfo );
+
+                if ( p->m_bIgnored )
+                    b.append( m_ignoredUpdate );
+
+                break;
+            }
+            case DISABLED_UPDATE:
+            {
+                if ( !m_disabledUpdates.empty() )
+                    showDescription( m_disabledUpdates[pos].aUpdateInfo );
+
+                if ( p->m_bIgnored )
+                    b.append( m_ignoredUpdate );
+
+                if ( m_disabledUpdates.empty() )
+                    break;
+
+                UpdateDialog::DisabledUpdate & data = m_disabledUpdates[ pos ];
+                if (data.unsatisfiedDependencies.hasElements())
+                {
+                    // create error string for version mismatch
+                    OUString sVersion( "%VERSION" );
+                    OUString sProductName( "%PRODUCTNAME" );
+                    sal_Int32 nPos = m_noDependencyCurVer.indexOf( sVersion );
+                    if ( nPos >= 0 )
+                    {
+                        m_noDependencyCurVer = m_noDependencyCurVer.replaceAt( nPos, sVersion.getLength(), utl::ConfigManager::getAboutBoxProductVersion() );
+                    }
+                    nPos = m_noDependencyCurVer.indexOf( sProductName );
+                    if ( nPos >= 0 )
+                    {
+                        m_noDependencyCurVer = m_noDependencyCurVer.replaceAt( nPos, sProductName.getLength(), utl::ConfigManager::getProductName() );
+                    }
+                    nPos = m_noDependency.indexOf( sProductName );
+                    if ( nPos >= 0 )
+                    {
+                        m_noDependency = m_noDependency.replaceAt( nPos, sProductName.getLength(), utl::ConfigManager::getProductName() );
+                    }
+
+                    b.append(m_noInstall);
+                    b.append(LF);
+                    b.append(m_noDependency);
+                    for (sal_Int32 i = 0;
+                         i < data.unsatisfiedDependencies.getLength(); ++i)
+                    {
+                        b.append(LF);
+                        b.append("  ");
+                            // U+2003 EM SPACE would be better than two spaces,
+                            // but some fonts do not contain it
+                        b.append(
+                            confineToParagraph(
+                                data.unsatisfiedDependencies[i]));
+                    }
+                    b.append(LF);
+                    b.append("  ");
+                    b.append(m_noDependencyCurVer);
+                }
+                break;
+            }
+            case SPECIFIC_ERROR:
+            {
+                UpdateDialog::SpecificError & data = m_specificErrors[ pos ];
+                b.append(m_failure);
+                b.append(LF);
+                b.append( data.message.isEmpty() ? m_unknownError : data.message );
+                break;
+            }
+            default:
+                OSL_ASSERT(false);
+                break;
+        }
+    }
+
+    if ( b.isEmpty() )
+        b.append( m_noDescription );
+
+    showDescription( b.makeStringAndClear() );
+}
+
+IMPL_LINK_NOARG(UpdateDialog, allHandler, weld::Toggleable&, void)
+{
+    if (m_xAll->get_active())
+    {
+        m_xUpdate->set_sensitive(true);
+        m_xUpdates->set_sensitive(true);
+        m_xDescription->set_sensitive(true);
+        m_xDescriptions->set_sensitive(true);
+
+        for (auto const& listboxEntry : m_ListboxEntries)
+        {
+            if ( listboxEntry->m_bIgnored || ( listboxEntry->m_eKind != ENABLED_UPDATE ) )
+                insertItem(listboxEntry.get(), false);
+        }
+    }
+    else
+    {
+        for (sal_uInt16 i = m_xUpdates->n_children(); i != 0 ;)
+        {
+            i -= 1;
+            UpdateDialog::Index const * p = weld::fromId<UpdateDialog::Index const*>(m_xUpdates->get_id(i));
+            if ( p->m_bIgnored || ( p->m_eKind != ENABLED_UPDATE ) )
+            {
+                m_xUpdates->remove(i);
+            }
+        }
+
+        if (m_xUpdates->n_children() == 0)
+        {
+            clearDescription();
+            m_xUpdate->set_sensitive(false);
+            m_xUpdates->set_sensitive(false);
+            if (m_xChecking->get_visible())
+                m_xDescription->set_sensitive(false);
+            else
+                showDescription(m_noInstallable);
+        }
+    }
+}
+
+IMPL_LINK_NOARG(UpdateDialog, okHandler, weld::Button&, void)
+{
+    //If users are going to update a shared extension then we need
+    //to warn them
+    for (auto const& enableUpdate : m_enabledUpdates)
+    {
+        OSL_ASSERT(enableUpdate.aInstalledPackage.is());
+        //If the user has no write access to the shared folder then the update
+        //for a shared extension is disable, that is it cannot be in m_enabledUpdates
+    }
+
+
+    for (sal_uInt16 i = 0, nCount = m_xUpdates->n_children(); i < nCount; ++i)
+    {
+        UpdateDialog::Index const * p =
+            weld::fromId<UpdateDialog::Index const*>(m_xUpdates->get_id(i));
+        if (p->m_eKind == ENABLED_UPDATE && m_xUpdates->get_toggle(i) == TRISTATE_TRUE) {
+            m_updateData.push_back( m_enabledUpdates[ p->m_nIndex ] );
+        }
+    }
+
+    m_xDialog->response(RET_OK);
+}
+
+IMPL_LINK_NOARG(UpdateDialog, closeHandler, weld::Button&, void)
+{
+    m_thread->stop();
+    m_xDialog->response(RET_CANCEL);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_updatedialog.hxx b/desktop/source/deployment/gui/dp_gui_updatedialog.hxx
new file mode 100644
index 000000000..cbf376955
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_updatedialog.hxx
@@ -0,0 +1,168 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vector>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <tools/link.hxx>
+#include <vcl/weld.hxx>
+
+#include "dp_gui_updatedata.hxx"
+
+/// @HTML
+
+class Image;
+class KeyEvent;
+class MouseEvent;
+class ResId;
+
+namespace com::sun::star {
+    namespace deployment { class XExtensionManager;
+                           class XPackage; }
+    namespace uno { class XComponentContext; }
+}
+
+namespace dp_gui {
+/**
+   The modal &ldquo;Check for Updates&rdquo; dialog.
+*/
+class UpdateDialog: public weld::GenericDialogController {
+public:
+    /**
+       Create an instance.
+
+       <p>Exactly one of <code>selectedPackages</code> and
+       <code>packageManagers</code> must be non-null.</p>
+
+       @param context
+       a non-null component context
+
+       @param parent
+       the parent window, may be null
+
+       @param vExtensionList
+       check for updates for the contained extensions. There must only be one extension with
+       a particular identifier. If one extension is installed in several repositories, then the
+       one with the highest version must be used, because it contains the latest known update
+       information.
+    */
+    UpdateDialog(
+        css::uno::Reference< css::uno::XComponentContext > const & context,
+        weld::Window * parent,
+        std::vector< css::uno::Reference< css::deployment::XPackage > > && vExtensionList,
+        std::vector< dp_gui::UpdateData > * updateData);
+
+    virtual ~UpdateDialog() override;
+
+    virtual short run() override;
+
+    void notifyMenubar( bool bPrepareOnly, bool bRecheckOnly );
+    static void createNotifyJob( bool bPrepareOnly,
+        css::uno::Sequence< css::uno::Sequence< OUString > > const &rItemList );
+
+private:
+    UpdateDialog(UpdateDialog const &) = delete;
+    UpdateDialog& operator =(UpdateDialog const &) = delete;
+
+    struct DisabledUpdate;
+    struct SpecificError;
+    struct IgnoredUpdate;
+    struct Index;
+    friend struct Index;
+    class Thread;
+    friend class Thread;
+
+    friend class CheckListBox;
+
+    void insertItem(const UpdateDialog::Index *pIndex, bool bEnableCheckBox);
+    void addAdditional(const UpdateDialog::Index *pIndex, bool bEnableCheckBox);
+    bool isIgnoredUpdate( UpdateDialog::Index *pIndex );
+
+    void addEnabledUpdate( OUString const & name, dp_gui::UpdateData const & data );
+    void addDisabledUpdate( UpdateDialog::DisabledUpdate const & data );
+    void addSpecificError( UpdateDialog::SpecificError const & data );
+
+    void checkingDone();
+
+    void enableOk();
+
+    void getIgnoredUpdates();
+
+    void initDescription();
+    void clearDescription();
+    bool showDescription(css::uno::Reference<
+                         css::deployment::XPackage > const & aExtension);
+    bool showDescription(std::pair< OUString, OUString > const & pairPublisher,
+                         OUString const & sReleaseNotes);
+    bool showDescription( css::uno::Reference<
+        css::xml::dom::XNode > const & aUpdateInfo);
+    bool showDescription( const OUString& rDescription);
+
+    DECL_LINK(selectionHandler, weld::TreeView&, void);
+    DECL_LINK(allHandler, weld::Toggleable&, void);
+    DECL_LINK(okHandler, weld::Button&, void);
+    DECL_LINK(closeHandler, weld::Button&, void);
+    DECL_LINK(entryToggled, const weld::TreeView::iter_col&, void);
+
+    css::uno::Reference< css::uno::XComponentContext >  m_context;
+    OUString m_none;
+    OUString m_noInstallable;
+    OUString m_failure;
+    OUString m_unknownError;
+    OUString m_noDescription;
+    OUString m_noInstall;
+    OUString m_noDependency;
+    OUString m_noDependencyCurVer;
+    OUString m_browserbased;
+    OUString m_version;
+    OUString m_ignoredUpdate;
+    std::vector< dp_gui::UpdateData > m_enabledUpdates;
+    std::vector< UpdateDialog::DisabledUpdate > m_disabledUpdates;
+    std::vector< UpdateDialog::SpecificError > m_specificErrors;
+    std::vector< std::unique_ptr<UpdateDialog::IgnoredUpdate> > m_ignoredUpdates;
+    std::vector< std::unique_ptr<Index> > m_ListboxEntries;
+    std::vector< dp_gui::UpdateData > & m_updateData;
+    rtl::Reference< UpdateDialog::Thread > m_thread;
+    css::uno::Reference< css::deployment::XExtensionManager > m_xExtensionManager;
+
+    std::unique_ptr<weld::Label> m_xChecking;
+    std::unique_ptr<weld::Spinner> m_xThrobber;
+    std::unique_ptr<weld::Label> m_xUpdate;
+    std::unique_ptr<weld::TreeView> m_xUpdates;
+    std::unique_ptr<weld::CheckButton> m_xAll;
+    std::unique_ptr<weld::Label> m_xDescription;
+    std::unique_ptr<weld::Label> m_xPublisherLabel;
+    std::unique_ptr<weld::LinkButton> m_xPublisherLink;
+    std::unique_ptr<weld::Label> m_xReleaseNotesLabel;
+    std::unique_ptr<weld::LinkButton> m_xReleaseNotesLink;
+    std::unique_ptr<weld::TextView> m_xDescriptions;
+    std::unique_ptr<weld::Button> m_xOk;
+    std::unique_ptr<weld::Button> m_xClose;
+    std::unique_ptr<weld::Button> m_xHelp;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_updateinstalldialog.cxx b/desktop/source/deployment/gui/dp_gui_updateinstalldialog.cxx
new file mode 100644
index 000000000..9b1aa423d
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_updateinstalldialog.cxx
@@ -0,0 +1,665 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include "dp_gui_updatedata.hxx"
+
+#include <sal/config.h>
+#include <osl/file.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <utility>
+#include <vcl/svapp.hxx>
+#include <cppuhelper/implbase.hxx>
+
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/lang/WrappedTargetException.hpp>
+#include <com/sun/star/ucb/NameClash.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/ucb/XProgressHandler.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/deployment/LicenseException.hpp>
+#include <com/sun/star/deployment/VersionException.hpp>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+
+#include <dp_descriptioninfoset.hxx>
+#include <strings.hrc>
+#include "dp_gui_updateinstalldialog.hxx"
+#include <dp_shared.hxx>
+#include <dp_ucb.h>
+#include <dp_misc.h>
+#include "dp_gui_extensioncmdqueue.hxx"
+#include <ucbhelper/content.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ref.hxx>
+#include <salhelper/thread.hxx>
+#include <com/sun/star/uno/Sequence.h>
+#include <comphelper/anytostring.hxx>
+
+#include <string_view>
+#include <vector>
+
+using dp_misc::StrTitle;
+
+namespace dp_gui {
+
+class UpdateInstallDialog::Thread: public salhelper::Thread {
+    friend class UpdateCommandEnv;
+public:
+    Thread(css::uno::Reference< css::uno::XComponentContext > const & ctx,
+        UpdateInstallDialog & dialog, std::vector< dp_gui::UpdateData > & aVecUpdateData);
+
+    void stop();
+
+private:
+    virtual ~Thread() override;
+
+    virtual void execute() override;
+    void downloadExtensions();
+    bool download(OUString const & aUrls, UpdateData & aUpdatData);
+    void installExtensions();
+    void removeTempDownloads();
+
+    UpdateInstallDialog & m_dialog;
+
+    // guarded by Application::GetSolarMutex():
+    css::uno::Reference< css::task::XAbortChannel > m_abort;
+    css::uno::Reference< css::uno::XComponentContext > m_xComponentContext;
+    std::vector< dp_gui::UpdateData > & m_aVecUpdateData;
+    ::rtl::Reference<UpdateCommandEnv> m_updateCmdEnv;
+
+    //A folder which is created in the temp directory in which then the updates are downloaded
+    OUString m_sDownloadFolder;
+
+    bool m_stop;
+
+};
+
+class UpdateCommandEnv
+    : public ::cppu::WeakImplHelper< css::ucb::XCommandEnvironment,
+                                      css::task::XInteractionHandler,
+                                      css::ucb::XProgressHandler >
+{
+    friend class UpdateInstallDialog::Thread;
+
+    ::rtl::Reference<UpdateInstallDialog::Thread> m_installThread;
+    css::uno::Reference< css::uno::XComponentContext > m_xContext;
+
+public:
+    UpdateCommandEnv( css::uno::Reference< css::uno::XComponentContext > xCtx,
+        ::rtl::Reference<UpdateInstallDialog::Thread> thread);
+
+    // XCommandEnvironment
+    virtual css::uno::Reference<css::task::XInteractionHandler > SAL_CALL
+    getInteractionHandler() override;
+    virtual css::uno::Reference<css::ucb::XProgressHandler >
+    SAL_CALL getProgressHandler() override;
+
+    // XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+    // XProgressHandler
+    virtual void SAL_CALL push( css::uno::Any const & Status ) override;
+    virtual void SAL_CALL update( css::uno::Any const & Status ) override;
+    virtual void SAL_CALL pop() override;
+};
+
+
+UpdateInstallDialog::Thread::Thread(
+    css::uno::Reference< css::uno::XComponentContext> const & xCtx,
+    UpdateInstallDialog & dialog,
+    std::vector< dp_gui::UpdateData > & aVecUpdateData):
+    salhelper::Thread("dp_gui_updateinstalldialog"),
+    m_dialog(dialog),
+    m_xComponentContext(xCtx),
+    m_aVecUpdateData(aVecUpdateData),
+    m_updateCmdEnv(new UpdateCommandEnv(xCtx, this)),
+    m_stop(false)
+{}
+
+void UpdateInstallDialog::Thread::stop() {
+    css::uno::Reference< css::task::XAbortChannel > abort;
+    {
+        SolarMutexGuard g;
+        abort = m_abort;
+        m_stop = true;
+    }
+    if (abort.is()) {
+        abort->sendAbort();
+    }
+}
+
+UpdateInstallDialog::Thread::~Thread() {}
+
+void UpdateInstallDialog::Thread::execute()
+{
+    try {
+        downloadExtensions();
+        installExtensions();
+    }
+    catch (...)
+    {
+    }
+
+    //clean up the temp directories
+    try {
+        removeTempDownloads();
+    } catch( ... ) {
+    }
+
+    {
+        //make sure m_dialog is still alive
+        SolarMutexGuard g;
+        if (! m_stop)
+             m_dialog.updateDone();
+    }
+    //UpdateCommandEnv keeps a reference to Thread and prevents destruction. Therefore remove it.
+    m_updateCmdEnv->m_installThread.clear();
+}
+
+UpdateInstallDialog::UpdateInstallDialog(
+    weld::Window* pParent,
+    std::vector<dp_gui::UpdateData> & aVecUpdateData,
+    css::uno::Reference< css::uno::XComponentContext > const & xCtx)
+    : GenericDialogController(pParent, "desktop/ui/updateinstalldialog.ui",
+                              "UpdateInstallDialog")
+    , m_thread(new Thread(xCtx, *this, aVecUpdateData))
+    , m_bError(false)
+    , m_bNoEntry(true)
+    , m_sInstalling(DpResId(RID_DLG_UPDATE_INSTALL_INSTALLING))
+    , m_sFinished(DpResId(RID_DLG_UPDATE_INSTALL_FINISHED))
+    , m_sNoErrors(DpResId(RID_DLG_UPDATE_INSTALL_NO_ERRORS))
+    , m_sErrorDownload(DpResId(RID_DLG_UPDATE_INSTALL_ERROR_DOWNLOAD))
+    , m_sErrorInstallation(DpResId(RID_DLG_UPDATE_INSTALL_ERROR_INSTALLATION))
+    , m_sErrorLicenseDeclined(DpResId(RID_DLG_UPDATE_INSTALL_ERROR_LIC_DECLINED))
+    , m_sNoInstall(DpResId(RID_DLG_UPDATE_INSTALL_EXTENSION_NOINSTALL))
+    , m_sThisErrorOccurred(DpResId(RID_DLG_UPDATE_INSTALL_THIS_ERROR_OCCURRED))
+    , m_xFt_action(m_xBuilder->weld_label("DOWNLOADING"))
+    , m_xStatusbar(m_xBuilder->weld_progress_bar("STATUSBAR"))
+    , m_xFt_extension_name(m_xBuilder->weld_label("EXTENSION_NAME"))
+    , m_xMle_info(m_xBuilder->weld_text_view("INFO"))
+    , m_xHelp(m_xBuilder->weld_button("help"))
+    , m_xOk(m_xBuilder->weld_button("ok"))
+    , m_xCancel(m_xBuilder->weld_button("cancel"))
+{
+    m_xMle_info->set_size_request(m_xMle_info->get_approximate_digit_width() * 52,
+                                  m_xMle_info->get_height_rows(5));
+
+    m_xExtensionManager = css::deployment::ExtensionManager::get( xCtx );
+
+    m_xCancel->connect_clicked(LINK(this, UpdateInstallDialog, cancelHandler));
+    if ( ! dp_misc::office_is_running())
+        m_xHelp->set_sensitive(false);
+}
+
+UpdateInstallDialog::~UpdateInstallDialog()
+{
+}
+
+short UpdateInstallDialog::run()
+{
+    m_thread->launch();
+    short nRet = GenericDialogController::run();
+    m_thread->stop();
+    return nRet;
+}
+
+// make sure the solar mutex is locked before calling
+void UpdateInstallDialog::updateDone()
+{
+    if (!m_bError)
+        m_xMle_info->set_text(m_xMle_info->get_text() + m_sNoErrors);
+    m_xOk->set_sensitive(true);
+    m_xOk->grab_focus();
+    m_xCancel->set_sensitive(false);
+}
+
+// make sure the solar mutex is locked before calling
+//sets an error message in the text area
+void UpdateInstallDialog::setError(INSTALL_ERROR err, std::u16string_view sExtension,
+    std::u16string_view exceptionMessage)
+{
+    OUString sError;
+    m_bError = true;
+
+    switch (err)
+    {
+    case ERROR_DOWNLOAD:
+        sError = m_sErrorDownload;
+        break;
+    case ERROR_INSTALLATION:
+        sError = m_sErrorInstallation;
+        break;
+    case ERROR_LICENSE_DECLINED:
+        sError = m_sErrorLicenseDeclined;
+        break;
+
+    default:
+        OSL_ASSERT(false);
+    }
+
+    OUString sMsg(m_xMle_info->get_text());
+    sError = sError.replaceFirst("%NAME", sExtension);
+    //We want to have an empty line between the error messages. However,
+    //there shall be no empty line after the last entry.
+    if (m_bNoEntry)
+        m_bNoEntry = false;
+    else
+        sMsg += "\n";
+    sMsg += sError;
+    //Insert more information about the error
+    if (!exceptionMessage.empty())
+        sMsg += m_sThisErrorOccurred + exceptionMessage + "\n";
+
+    sMsg += m_sNoInstall + "\n";
+
+    m_xMle_info->set_text(sMsg);
+}
+
+void UpdateInstallDialog::setError(std::u16string_view exceptionMessage)
+{
+    m_bError = true;
+    m_xMle_info->set_text(m_xMle_info->get_text() + exceptionMessage + "\n");
+}
+
+IMPL_LINK_NOARG(UpdateInstallDialog, cancelHandler, weld::Button&, void)
+{
+    m_xDialog->response(RET_CANCEL);
+}
+
+void UpdateInstallDialog::Thread::downloadExtensions()
+{
+    try
+    {
+        //create the download directory in the temp folder
+        OUString sTempDir;
+        if (::osl::FileBase::getTempDirURL(sTempDir) != ::osl::FileBase::E_None)
+            throw css::uno::Exception("Could not get URL for the temp directory. No extensions will be installed.", nullptr);
+
+        //create a unique name for the directory
+        OUString tempEntry, destFolder;
+        if (::osl::File::createTempFile(&sTempDir, nullptr, &tempEntry ) != ::osl::File::E_None)
+            throw css::uno::Exception("Could not create a temporary file in " + sTempDir +
+             ". No extensions will be installed", nullptr );
+
+        tempEntry = tempEntry.copy( tempEntry.lastIndexOf( '/' ) + 1 );
+
+        destFolder = dp_misc::makeURL( sTempDir, tempEntry ) + "_";
+        m_sDownloadFolder = destFolder;
+        try
+        {
+            dp_misc::create_folder(nullptr, destFolder, m_updateCmdEnv );
+        } catch (const css::uno::Exception & e)
+        {
+            css::uno::Any anyEx = cppu::getCaughtException();
+            throw css::lang::WrappedTargetException( e.Message + " No extensions will be installed",
+                            nullptr, anyEx );
+        }
+
+
+        sal_uInt16 count = 0;
+        for (auto & updateData : m_aVecUpdateData)
+        {
+            if (!updateData.aUpdateInfo.is() || updateData.aUpdateSource.is())
+                continue;
+            //We assume that m_aVecUpdateData contains only information about extensions which
+            //can be downloaded directly.
+            OSL_ASSERT(updateData.sWebsiteURL.isEmpty());
+
+            //update the name of the extension which is to be downloaded
+            {
+                SolarMutexGuard g;
+                if (m_stop) {
+                    return;
+                }
+                m_dialog.m_xFt_extension_name->set_label(updateData.aInstalledPackage->getDisplayName());
+                sal_uInt16 prog = (sal::static_int_cast<sal_uInt16>(100) * ++count) /
+                    sal::static_int_cast<sal_uInt16>(m_aVecUpdateData.size());
+                m_dialog.m_xStatusbar->set_percentage(prog);
+            }
+            dp_misc::DescriptionInfoset info(m_xComponentContext, updateData.aUpdateInfo);
+            //remember occurring exceptions in case we need to print out error information
+            std::vector< std::pair<OUString, css::uno::Exception> > vecExceptions;
+            css::uno::Sequence<OUString> seqDownloadURLs = info.getUpdateDownloadUrls();
+            OSL_ENSURE(seqDownloadURLs.hasElements(), "No download URL provided!");
+            for (sal_Int32 j = 0; j < seqDownloadURLs.getLength(); j++)
+            {
+                try
+                {
+                    OSL_ENSURE(!seqDownloadURLs[j].isEmpty(), "Download URL is empty!");
+                    bool bCancelled = download(seqDownloadURLs[j], updateData);
+                    if (bCancelled || !updateData.sLocalURL.isEmpty())
+                        break;
+                }
+                catch ( css::uno::Exception & e )
+                {
+                    vecExceptions.emplace_back(seqDownloadURLs[j], e);
+                    //There can be several different errors, for example, the URL is wrong, webserver cannot be reached,
+                    //name cannot be resolved. The UCB helper API does not specify different special exceptions for these
+                    //cases. Therefore ignore and continue.
+                    continue;
+                }
+            }
+            //update the progress and display download error
+            {
+                SolarMutexGuard g;
+                if (m_stop) {
+                    return;
+                }
+                if (updateData.sLocalURL.isEmpty())
+                {
+                    //Construct a string of all messages contained in the exceptions plus the respective download URLs
+                    OUStringBuffer buf(256);
+                    size_t nPos = 0;
+                    for (auto const& elem : vecExceptions)
+                    {
+                        if (nPos)
+                            buf.append("\n");
+                        buf.append("Could not download ");
+                        buf.append(elem.first);
+                        buf.append(". ");
+                        buf.append(elem.second.Message);
+                        ++nPos;
+                    }
+                    m_dialog.setError(UpdateInstallDialog::ERROR_DOWNLOAD, updateData.aInstalledPackage->getDisplayName(),
+                        buf);
+                }
+            }
+
+        }
+    }
+    catch (const css::uno::Exception & e)
+    {
+        SolarMutexGuard g;
+        if (m_stop) {
+            return;
+        }
+        m_dialog.setError(e.Message);
+    }
+}
+
+void UpdateInstallDialog::Thread::installExtensions()
+{
+    //Update the fix text in the dialog to "Installing extensions..."
+    {
+        SolarMutexGuard g;
+        if (m_stop) {
+            return;
+        }
+        m_dialog.m_xFt_action->set_label(m_dialog.m_sInstalling);
+        m_dialog.m_xStatusbar->set_percentage(0);
+    }
+
+    sal_uInt16 count = 0;
+    for (auto const& updateData : m_aVecUpdateData)
+    {
+        //update the name of the extension which is to be installed
+        {
+            SolarMutexGuard g;
+            if (m_stop) {
+                return;
+            }
+            //we only show progress after an extension has been installed.
+            if (count > 0) {
+                m_dialog.m_xStatusbar->set_percentage(
+                (sal::static_int_cast<sal_uInt16>(100) * count) /
+                sal::static_int_cast<sal_uInt16>(m_aVecUpdateData.size()));
+            }
+            m_dialog.m_xFt_extension_name->set_label(updateData.aInstalledPackage->getDisplayName());
+        }
+        bool bError = false;
+        bool bLicenseDeclined = false;
+        css::uno::Reference<css::deployment::XPackage> xExtension;
+        css::uno::Exception exc;
+        try
+        {
+            css::uno::Reference< css::task::XAbortChannel > xAbortChannel(
+                updateData.aInstalledPackage->createAbortChannel() );
+            {
+                SolarMutexGuard g;
+                if (m_stop) {
+                    return;
+                }
+                m_abort = xAbortChannel;
+            }
+            if (!updateData.aUpdateSource.is() && !updateData.sLocalURL.isEmpty())
+            {
+                css::beans::NamedValue prop("EXTENSION_UPDATE", css::uno::Any(OUString("1")));
+                if (!updateData.bIsShared)
+                    xExtension = m_dialog.getExtensionManager()->addExtension(
+                        updateData.sLocalURL, css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
+                        "user", xAbortChannel, m_updateCmdEnv);
+                else
+                    xExtension = m_dialog.getExtensionManager()->addExtension(
+                        updateData.sLocalURL, css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
+                        "shared", xAbortChannel, m_updateCmdEnv);
+            }
+            else if (updateData.aUpdateSource.is())
+            {
+                OSL_ASSERT(updateData.aUpdateSource.is());
+                //I am not sure if we should obtain the install properties and pass them into
+                //add extension. Currently it contains only "SUPPRESS_LICENSE". So it could happen
+                //that a license is displayed when updating from the shared repository, although the
+                //shared extension was installed using "SUPPRESS_LICENSE".
+                css::beans::NamedValue prop("EXTENSION_UPDATE", css::uno::Any(OUString("1")));
+                if (!updateData.bIsShared)
+                    xExtension = m_dialog.getExtensionManager()->addExtension(
+                        updateData.aUpdateSource->getURL(), css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
+                        "user", xAbortChannel, m_updateCmdEnv);
+                else
+                    xExtension = m_dialog.getExtensionManager()->addExtension(
+                        updateData.aUpdateSource->getURL(), css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
+                        "shared", xAbortChannel, m_updateCmdEnv);
+            }
+        }
+        catch (css::deployment::DeploymentException & de)
+        {
+            if (de.Cause.has<css::deployment::LicenseException>())
+            {
+                bLicenseDeclined = true;
+            }
+            else
+            {
+                exc = de.Cause.get<css::uno::Exception>();
+                bError = true;
+            }
+        }
+        catch (css::uno::Exception& e)
+        {
+            exc = e;
+            bError = true;
+        }
+
+        if (bLicenseDeclined)
+        {
+            SolarMutexGuard g;
+            if (m_stop) {
+                return;
+            }
+            m_dialog.setError(UpdateInstallDialog::ERROR_LICENSE_DECLINED,
+                updateData.aInstalledPackage->getDisplayName(), std::u16string_view());
+        }
+        else if (!xExtension.is() || bError)
+        {
+            SolarMutexGuard g;
+            if (m_stop) {
+                return;
+            }
+            m_dialog.setError(UpdateInstallDialog::ERROR_INSTALLATION,
+                updateData.aInstalledPackage->getDisplayName(), exc.Message);
+        }
+        ++count;
+    }
+    {
+        SolarMutexGuard g;
+        if (m_stop) {
+            return;
+        }
+        m_dialog.m_xStatusbar->set_percentage(100);
+        m_dialog.m_xFt_extension_name->set_label(OUString());
+        m_dialog.m_xFt_action->set_label(m_dialog.m_sFinished);
+    }
+}
+
+void UpdateInstallDialog::Thread::removeTempDownloads()
+{
+    if (!m_sDownloadFolder.isEmpty())
+    {
+        dp_misc::erase_path(m_sDownloadFolder,
+            css::uno::Reference<css::ucb::XCommandEnvironment>(),false /* no throw: ignore errors */ );
+        //remove also the temp file which we have used to create the unique name
+        OUString tempFile = m_sDownloadFolder.copy(0, m_sDownloadFolder.getLength() - 1);
+        dp_misc::erase_path(tempFile, css::uno::Reference<css::ucb::XCommandEnvironment>(),false);
+        m_sDownloadFolder.clear();
+    }
+}
+
+bool UpdateInstallDialog::Thread::download(OUString const & sDownloadURL, UpdateData & aUpdateData)
+{
+    {
+        SolarMutexGuard g;
+        if (m_stop) {
+            return m_stop;
+        }
+    }
+
+    OSL_ASSERT(m_sDownloadFolder.getLength());
+    OUString destFolder, tempEntry;
+    if (::osl::File::createTempFile(
+        &m_sDownloadFolder,
+        nullptr, &tempEntry ) != ::osl::File::E_None)
+    {
+        //ToDo feedback in window that download of this component failed
+        throw css::uno::Exception("Could not create temporary file in folder " + destFolder + ".", nullptr);
+    }
+    tempEntry = tempEntry.copy( tempEntry.lastIndexOf( '/' ) + 1 );
+
+    destFolder = dp_misc::makeURL( m_sDownloadFolder, tempEntry ) + "_";
+
+    ::ucbhelper::Content destFolderContent;
+    dp_misc::create_folder( &destFolderContent, destFolder, m_updateCmdEnv );
+
+    ::ucbhelper::Content sourceContent;
+    (void)dp_misc::create_ucb_content(&sourceContent, sDownloadURL, m_updateCmdEnv);
+
+    const OUString sTitle( StrTitle::getTitle( sourceContent ) );
+
+    destFolderContent.transferContent(
+            sourceContent, ::ucbhelper::InsertOperation::Copy,
+            sTitle, css::ucb::NameClash::OVERWRITE );
+
+    {
+        //the user may have cancelled the dialog because downloading took too long
+        SolarMutexGuard g;
+        if (m_stop) {
+            return m_stop;
+        }
+        //all errors should be handled by the command environment.
+        aUpdateData.sLocalURL = destFolder + "/" + sTitle;
+    }
+
+    return m_stop;
+}
+
+UpdateCommandEnv::UpdateCommandEnv( css::uno::Reference< css::uno::XComponentContext > xCtx,
+    ::rtl::Reference<UpdateInstallDialog::Thread> thread)
+    : m_installThread(std::move(thread)),
+    m_xContext(std::move(xCtx))
+{
+}
+
+// XCommandEnvironment
+css::uno::Reference<css::task::XInteractionHandler> UpdateCommandEnv::getInteractionHandler()
+{
+    return this;
+}
+
+css::uno::Reference<css::ucb::XProgressHandler> UpdateCommandEnv::getProgressHandler()
+{
+    return this;
+}
+
+// XInteractionHandler
+void UpdateCommandEnv::handle(
+    css::uno::Reference< css::task::XInteractionRequest> const & xRequest )
+{
+    css::uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == css::uno::TypeClass_EXCEPTION );
+    dp_misc::TRACE("[dp_gui_cmdenv.cxx] incoming request:\n"
+        + ::comphelper::anyToString(request) + "\n\n");
+
+    css::deployment::VersionException verExc;
+    bool approve = false;
+
+    if (request >>= verExc)
+    {   //We must catch the version exception during the update,
+        //because otherwise the user would be confronted with the dialogs, asking
+        //them if they want to replace an already installed version of the same extension.
+        //During an update we assume that we always want to replace the old version with the
+        //new version.
+        approve = true;
+    }
+
+    if (!approve)
+    {
+        //forward to interaction handler for main dialog.
+        handleInteractionRequest( m_xContext, xRequest );
+    }
+    else
+    {
+        // select:
+        css::uno::Sequence< css::uno::Reference< css::task::XInteractionContinuation > > conts(
+            xRequest->getContinuations() );
+        css::uno::Reference< css::task::XInteractionContinuation > const * pConts =
+            conts.getConstArray();
+        sal_Int32 len = conts.getLength();
+        for ( sal_Int32 pos = 0; pos < len; ++pos )
+        {
+            if (approve) {
+                css::uno::Reference< css::task::XInteractionApprove > xInteractionApprove(
+                    pConts[ pos ], css::uno::UNO_QUERY );
+                if (xInteractionApprove.is()) {
+                    xInteractionApprove->select();
+                    // don't query again for ongoing continuations:
+                    approve = false;
+                }
+            }
+        }
+    }
+}
+
+// XProgressHandler
+void UpdateCommandEnv::push( css::uno::Any const & /*Status*/ )
+{
+}
+
+void UpdateCommandEnv::update( css::uno::Any const & /*Status */)
+{
+}
+
+void UpdateCommandEnv::pop()
+{
+}
+
+
+} //end namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_updateinstalldialog.hxx b/desktop/source/deployment/gui/dp_gui_updateinstalldialog.hxx
new file mode 100644
index 000000000..39b37ed4b
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_updateinstalldialog.hxx
@@ -0,0 +1,112 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+#include <vcl/weld.hxx>
+#include <rtl/ref.hxx>
+
+#include <string_view>
+#include <vector>
+
+/// @HTML
+namespace com::sun::star::deployment {
+    class XExtensionManager;
+}
+namespace com::sun::star::uno {
+    class XComponentContext;
+}
+
+namespace dp_gui {
+
+    struct UpdateData;
+    class UpdateCommandEnv;
+
+
+/**
+   The modal &ldquo;Download and Installation&rdquo; dialog.
+*/
+class UpdateInstallDialog : public weld::GenericDialogController
+{
+public:
+    /**
+       Create an instance.
+
+       @param parent
+       the parent window, may be null
+    */
+    UpdateInstallDialog(weld::Window* parent, std::vector<UpdateData> & aVecUpdateData,
+        css::uno::Reference< css::uno::XComponentContext > const & xCtx);
+
+    virtual ~UpdateInstallDialog() override;
+
+    virtual short run() override;
+
+private:
+    UpdateInstallDialog(UpdateInstallDialog const &) = delete;
+    UpdateInstallDialog& operator =(UpdateInstallDialog const &) = delete;
+
+    class Thread;
+    friend class Thread;
+    friend class UpdateCommandEnv;
+
+    DECL_LINK(cancelHandler, weld::Button&, void);
+
+    //signals in the dialog that we have finished.
+    void updateDone();
+    //Writes a particular error into the info listbox.
+    enum INSTALL_ERROR
+    {
+        ERROR_DOWNLOAD,
+        ERROR_INSTALLATION,
+        ERROR_LICENSE_DECLINED
+    };
+    void setError(INSTALL_ERROR err, std::u16string_view sExtension, std::u16string_view exceptionMessage);
+    void setError(std::u16string_view exceptionMessage);
+    const css::uno::Reference< css::deployment::XExtensionManager >& getExtensionManager() const
+            { return m_xExtensionManager; }
+
+    rtl::Reference< Thread > m_thread;
+    css::uno::Reference< css::deployment::XExtensionManager > m_xExtensionManager;
+    //Signals that an error occurred during download and installation
+    bool m_bError;
+    bool m_bNoEntry;
+
+    OUString m_sInstalling;
+    OUString m_sFinished;
+    OUString m_sNoErrors;
+    OUString m_sErrorDownload;
+    OUString m_sErrorInstallation;
+    OUString m_sErrorLicenseDeclined;
+    OUString m_sNoInstall;
+    OUString m_sThisErrorOccurred;
+
+    std::unique_ptr<weld::Label> m_xFt_action;
+    std::unique_ptr<weld::ProgressBar>  m_xStatusbar;
+    std::unique_ptr<weld::Label> m_xFt_extension_name;
+    std::unique_ptr<weld::TextView> m_xMle_info;
+    std::unique_ptr<weld::Button> m_xHelp;
+    std::unique_ptr<weld::Button> m_xOk;
+    std::unique_ptr<weld::Button> m_xCancel;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/license_dialog.cxx b/desktop/source/deployment/gui/license_dialog.cxx
new file mode 100644
index 000000000..23f184a33
--- /dev/null
+++ b/desktop/source/deployment/gui/license_dialog.cxx
@@ -0,0 +1,244 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <comphelper/unwrapargs.hxx>
+#include <vcl/event.hxx>
+#include <vcl/idle.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/threadex.hxx>
+#include <vcl/weld.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include "license_dialog.hxx"
+
+#include <functional>
+#include <string_view>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_gui {
+
+namespace {
+
+struct LicenseDialogImpl : public weld::GenericDialogController
+{
+    bool m_bLicenseRead;
+    Idle m_aResized;
+    AutoTimer m_aRepeat;
+
+    std::unique_ptr<weld::Label> m_xFtHead;
+    std::unique_ptr<weld::Widget> m_xArrow1;
+    std::unique_ptr<weld::Widget> m_xArrow2;
+    std::unique_ptr<weld::TextView> m_xLicense;
+    std::unique_ptr<weld::Button> m_xDown;
+    std::unique_ptr<weld::Button> m_xAcceptButton;
+    std::unique_ptr<weld::Button> m_xDeclineButton;
+
+    void PageDown();
+    DECL_LINK(ScrollTimerHdl, Timer*, void);
+    DECL_LINK(ScrolledHdl, weld::TextView&, void);
+    DECL_LINK(ResizedHdl, Timer*, void);
+    DECL_LINK(CancelHdl, weld::Button&, void);
+    DECL_LINK(AcceptHdl, weld::Button&, void);
+    DECL_LINK(KeyInputHdl, const KeyEvent&, bool);
+    DECL_STATIC_LINK(LicenseDialogImpl, KeyReleaseHdl, const KeyEvent&, bool);
+    DECL_LINK(MousePressHdl, const MouseEvent&, bool);
+    DECL_LINK(MouseReleaseHdl, const MouseEvent&, bool);
+    DECL_LINK(SizeAllocHdl, const Size&, void);
+
+    LicenseDialogImpl(weld::Window * pParent,
+                      std::u16string_view sExtensionName,
+                      const OUString & sLicenseText);
+
+    bool IsEndReached() const;
+};
+
+}
+
+LicenseDialogImpl::LicenseDialogImpl(
+    weld::Window * pParent,
+    std::u16string_view sExtensionName,
+    const OUString & sLicenseText)
+    : GenericDialogController(pParent, "desktop/ui/licensedialog.ui", "LicenseDialog")
+    , m_bLicenseRead(false)
+    , m_aResized("desktop LicenseDialogImpl m_aResized")
+    , m_aRepeat("LicenseDialogImpl m_aRepeat")
+    , m_xFtHead(m_xBuilder->weld_label("head"))
+    , m_xArrow1(m_xBuilder->weld_widget("arrow1"))
+    , m_xArrow2(m_xBuilder->weld_widget("arrow2"))
+    , m_xLicense(m_xBuilder->weld_text_view("textview"))
+    , m_xDown(m_xBuilder->weld_button("down"))
+    , m_xAcceptButton(m_xBuilder->weld_button("ok"))
+    , m_xDeclineButton(m_xBuilder->weld_button("cancel"))
+{
+    m_xArrow1->show();
+    m_xArrow2->hide();
+
+    m_xLicense->connect_size_allocate(LINK(this, LicenseDialogImpl, SizeAllocHdl));
+    m_xLicense->set_size_request(m_xLicense->get_approximate_digit_width() * 72,
+                                     m_xLicense->get_height_rows(21));
+
+    m_xLicense->set_text(sLicenseText);
+    m_xFtHead->set_label(m_xFtHead->get_label() + "\n" + sExtensionName);
+
+    m_xAcceptButton->connect_clicked( LINK(this, LicenseDialogImpl, AcceptHdl) );
+    m_xDeclineButton->connect_clicked( LINK(this, LicenseDialogImpl, CancelHdl) );
+
+    m_xLicense->connect_vadjustment_changed(LINK(this, LicenseDialogImpl, ScrolledHdl));
+    m_xDown->connect_mouse_press(LINK(this, LicenseDialogImpl, MousePressHdl));
+    m_xDown->connect_mouse_release(LINK(this, LicenseDialogImpl, MouseReleaseHdl));
+    m_xDown->connect_key_press(LINK(this, LicenseDialogImpl, KeyInputHdl));
+    m_xDown->connect_key_release(LINK(this, LicenseDialogImpl, KeyReleaseHdl));
+
+    m_aRepeat.SetTimeout(Application::GetSettings().GetMouseSettings().GetButtonRepeat());
+    m_aRepeat.SetInvokeHandler(LINK(this, LicenseDialogImpl, ScrollTimerHdl));
+
+    m_aResized.SetPriority(TaskPriority::LOWEST);
+    m_aResized.SetInvokeHandler(LINK(this, LicenseDialogImpl, ResizedHdl));
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, SizeAllocHdl, const Size&, void)
+{
+    m_aResized.Start();
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, AcceptHdl, weld::Button&, void)
+{
+    m_xDialog->response(RET_OK);
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, CancelHdl, weld::Button&, void)
+{
+    m_xDialog->response(RET_CANCEL);
+}
+
+bool LicenseDialogImpl::IsEndReached() const
+{
+    return m_xLicense->vadjustment_get_value() + m_xLicense->vadjustment_get_page_size() >= m_xLicense->vadjustment_get_upper();
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, ScrolledHdl, weld::TextView&, void)
+{
+    if (IsEndReached())
+    {
+        m_xDown->set_sensitive(false);
+        m_aRepeat.Stop();
+
+        if (!m_bLicenseRead)
+        {
+            m_xAcceptButton->set_sensitive(true);
+            m_xAcceptButton->grab_focus();
+            m_xArrow1->hide();
+            m_xArrow2->show();
+            m_bLicenseRead = true;
+        }
+    }
+    else
+        m_xDown->set_sensitive(true);
+}
+
+void LicenseDialogImpl::PageDown()
+{
+    m_xLicense->vadjustment_set_value(m_xLicense->vadjustment_get_value() +
+                                      m_xLicense->vadjustment_get_page_size());
+    ScrolledHdl(*m_xLicense);
+}
+
+IMPL_LINK(LicenseDialogImpl, KeyInputHdl, const KeyEvent&, rKEvt, bool)
+{
+    vcl::KeyCode aKeyCode = rKEvt.GetKeyCode();
+    if (aKeyCode.GetCode() == KEY_RETURN || aKeyCode.GetCode() == KEY_SPACE)
+        PageDown();
+    return false;
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, ResizedHdl, Timer*, void)
+{
+    ScrolledHdl(*m_xLicense);
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, ScrollTimerHdl, Timer*, void)
+{
+    PageDown();
+}
+
+IMPL_STATIC_LINK_NOARG(LicenseDialogImpl, KeyReleaseHdl, const KeyEvent&, bool)
+{
+    return false;
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, MousePressHdl, const MouseEvent&, bool)
+{
+    PageDown();
+    m_aRepeat.Start();
+    return false;
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, MouseReleaseHdl, const MouseEvent&, bool)
+{
+    m_aRepeat.Stop();
+    return false;
+}
+
+LicenseDialog::LicenseDialog( Sequence<Any> const& args,
+                          Reference<XComponentContext> const& )
+{
+    comphelper::unwrapArgs( args, m_parent, m_sExtensionName, m_sLicenseText );
+}
+
+// XServiceInfo
+OUString LicenseDialog::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.ui.LicenseDialog";
+}
+
+sal_Bool LicenseDialog::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > LicenseDialog::getSupportedServiceNames()
+{
+    return { "com.sun.star.deployment.ui.LicenseDialog" };
+}
+
+
+// XExecutableDialog
+
+void LicenseDialog::setTitle( OUString const & )
+{
+}
+
+sal_Int16 LicenseDialog::execute()
+{
+    return vcl::solarthread::syncExecute(
+        std::bind(&LicenseDialog::solar_execute, this));
+}
+
+sal_Int16 LicenseDialog::solar_execute()
+{
+    LicenseDialogImpl dlg(Application::GetFrameWeld(m_parent), m_sExtensionName, m_sLicenseText);
+    return dlg.run();
+}
+
+} // namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/license_dialog.hxx b/desktop/source/deployment/gui/license_dialog.hxx
new file mode 100644
index 000000000..3c628a880
--- /dev/null
+++ b/desktop/source/deployment/gui/license_dialog.hxx
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#pragma once
+
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/awt/XWindow.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/ui/dialogs/XExecutableDialog.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+namespace dp_gui
+{
+class LicenseDialog
+    : public ::cppu::WeakImplHelper<css::ui::dialogs::XExecutableDialog, css::lang::XServiceInfo>
+{
+    css::uno::Reference<css::awt::XWindow> /* const */ m_parent;
+    OUString m_sExtensionName;
+    OUString /* const */ m_sLicenseText;
+
+    sal_Int16 solar_execute();
+
+public:
+    LicenseDialog(css::uno::Sequence<css::uno::Any> const& args,
+                  css::uno::Reference<css::uno::XComponentContext> const& xComponentContext);
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
+    virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+    // XExecutableDialog
+    virtual void SAL_CALL setTitle(OUString const& title) override;
+    virtual sal_Int16 SAL_CALL execute() override;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_dependencies.hxx b/desktop/source/deployment/inc/dp_dependencies.hxx
new file mode 100644
index 000000000..1c9872c78
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_dependencies.hxx
@@ -0,0 +1,72 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include "dp_misc_api.hxx"
+
+/// @HTML
+
+namespace com::sun::star::xml::dom {
+    class XElement;
+}
+namespace dp_misc { class DescriptionInfoset; }
+
+namespace dp_misc {
+
+/**
+   Dependency handling.
+*/
+namespace Dependencies {
+    /**
+       Check for unsatisfied dependencies.
+
+       @param infoset
+       the infoset containing the dependencies to check
+
+       @return
+       a list of the unsatisfied dependencies from <code>infoset</code> (in no
+       specific order)
+    */
+    DESKTOP_DEPLOYMENTMISC_DLLPUBLIC css::uno::Sequence<
+        css::uno::Reference< css::xml::dom::XElement > >
+    check(dp_misc::DescriptionInfoset const & infoset);
+
+    /**
+       Obtain the (human-readable) error message of a failed dependency.
+
+       @param dependency
+       a dependency represented as a non-null XML element
+
+       @return
+       the name of the dependency; will never be empty, as a localized
+       &ldquo;unknown&rdquo; is substituted for an empty/missing name
+    */
+    DESKTOP_DEPLOYMENTMISC_DLLPUBLIC OUString getErrorText(
+        css::uno::Reference< css::xml::dom::XElement >
+            const & dependency);
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_descriptioninfoset.hxx b/desktop/source/deployment/inc/dp_descriptioninfoset.hxx
new file mode 100644
index 000000000..08d533a79
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_descriptioninfoset.hxx
@@ -0,0 +1,287 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <optional>
+#include <string_view>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <sal/types.h>
+#include "dp_misc_api.hxx"
+
+/// @HTML
+
+namespace com::sun::star {
+    namespace uno { class XComponentContext; }
+    namespace xml {
+        namespace dom {
+            class XNode;
+            class XNodeList;
+        }
+        namespace xpath { class XXPathAPI; }
+    }
+}
+
+namespace dp_misc {
+
+struct DESKTOP_DEPLOYMENTMISC_DLLPUBLIC SimpleLicenseAttributes
+{
+    OUString acceptBy;
+    //Attribute suppress-on-update. Default is false.
+    bool suppressOnUpdate;
+    //Attribute suppress-if-required. Default is false.
+    bool suppressIfRequired;
+};
+
+
+/**
+   Access to the content of an XML <code>description</code> element.
+
+   <p>This works for <code>description</code> elements in both the
+   <code>description.xml</code> file and online update information formats.</p>
+*/
+class DESKTOP_DEPLOYMENTMISC_DLLPUBLIC DescriptionInfoset {
+public:
+    /**
+       Create an instance.
+
+       @param context
+       a non-null component context
+
+       @param element
+       a <code>description</code> element; may be null (equivalent to an element
+       with no content)
+    */
+    DescriptionInfoset(
+        css::uno::Reference< css::uno::XComponentContext > const & context,
+        css::uno::Reference< css::xml::dom::XNode > const & element);
+
+    ~DescriptionInfoset();
+
+    /**
+       Return the identifier.
+
+       @return
+       the identifier, or an empty <code>optional</code> if none is specified
+    */
+    ::std::optional< OUString > getIdentifier() const;
+
+    /**
+       Return the textual version representation.
+
+       @return
+       textual version representation
+    */
+    OUString getVersion() const;
+
+    /**
+        Returns a list of supported platforms.
+
+        If the extension does not specify a platform by leaving out the platform element
+        then we assume that the extension supports all platforms. In this case the returned
+        sequence will have one element, which is &quot;all&quot;.
+        If the platform element is present but does not specify a platform then an empty
+        sequence is returned. Examples for invalid platform elements:
+        <pre>
+            <platform />, <platform value="" />, <platform value=",">
+        </pre>
+
+        The value attribute can contain various platform tokens. They must be separated by
+        commas.Each token will be stripped from leading and trailing white space (trim()).
+    */
+    css::uno::Sequence< OUString > getSupportedPlatforms() const;
+
+    /**
+        Returns the localized publisher name and the corresponding URL.
+
+        In case there is no publisher element then a pair of two empty strings is returned.
+    */
+    std::pair< OUString, OUString > getLocalizedPublisherNameAndURL() const;
+
+    /**
+        Returns the URL for the release notes corresponding to the office's locale.
+
+        In case there is no release-notes element then an empty string is returned.
+    */
+    OUString getLocalizedReleaseNotesURL() const;
+
+    /** returns the relative path to the license file.
+
+        In case there is no simple-license element then an empty string is returned.
+    */
+    OUString getLocalizedLicenseURL() const;
+
+    /** returns the attributes of the simple-license element
+
+        As long as there is a simple-license element, the function will return
+        the structure. If it does not exist, then the optional object is uninitialized.
+    */
+    ::std::optional<SimpleLicenseAttributes> getSimpleLicenseAttributes() const;
+
+    /** returns the localized display name of the extensions.
+
+        In case there is no localized display-name then an empty string is returned.
+    */
+    OUString getLocalizedDisplayName() const;
+
+    /**
+        returns the download website URL from the update information.
+
+        There can be multiple URLs where each is assigned to a particular locale.
+        The function returns the URL which locale matches best the one used in the office.
+
+        The return value is an optional because it may be necessary to find out if there
+        was a value provided or not. This is necessary to flag the extension in the update dialog
+        properly as "browser based update". The return value will only then not be initialized
+        if there is no <code>&lt;update-website&gt;</code>. If the element exists, then it must
+        have at least one child element containing a URL.
+
+        The <code>&lt;update-website&gt;</code> and <code>&lt;update-download&gt;</code>
+        elements are mutually exclusive.
+
+        @return
+        the download website URL, or an empty <code>optional</code> if none is
+        specified
+    */
+    ::std::optional< OUString > getLocalizedUpdateWebsiteURL() const;
+
+    /** returns the relative URL to the description.
+
+       The URL is relative to the root directory of the extensions.
+    */
+    OUString getLocalizedDescriptionURL() const;
+    /**
+       Return the dependencies.
+
+       @return
+       dependencies; will never be null
+    */
+    css::uno::Reference< css::xml::dom::XNodeList >
+    getDependencies() const;
+
+    /**
+       Return the update information URLs.
+
+       @return
+       update information URLs
+    */
+    css::uno::Sequence< OUString > getUpdateInformationUrls() const;
+
+     /**
+        Return the download URLs from the update information.
+
+        Because the <code>&lt;update-download&gt;</code> and the <code>&lt;update-website&gt;</code>
+        elements are mutually exclusive one may need to determine exactly if the element
+        was provided.
+
+        @return
+        download URLs
+     */
+    css::uno::Sequence< OUString > getUpdateDownloadUrls() const;
+
+    /**
+        Returns the URL for the icon image.
+    */
+    OUString getIconURL( bool bHighContrast ) const;
+
+    bool hasDescription() const;
+
+private:
+    SAL_DLLPRIVATE ::std::optional< OUString > getOptionalValue(
+        OUString const & expression) const;
+
+    SAL_DLLPRIVATE css::uno::Sequence< OUString > getUrls(
+        OUString const & expression) const;
+
+    /** Retrieves a child element which as lang attribute which matches the office locale.
+
+        Only top-level children are taken into account. It is also assumed that they are all
+        of the same element type and have a lang attribute. The matching algorithm is according
+        to RFC 3066, with the exception that only one variant is allowed.
+        @param parent
+        the expression used to obtain the parent of the localized children. It can be null.
+        Then a null reference is returned.
+    */
+    SAL_DLLPRIVATE css::uno::Reference< css::xml::dom::XNode >
+        getLocalizedChild( OUString const & sParent) const;
+    SAL_DLLPRIVATE  css::uno::Reference< css::xml::dom::XNode>
+        matchLanguageTag(
+        css::uno::Reference< css::xml::dom::XNode > const & xParent,
+        std::u16string_view rTag) const;
+
+    /** If there is no child element with a locale matching the office locale, then we use
+        the first child. In the case of the simple-license we also use the former default locale, which
+        was determined by the default-license-id (/description/registration/simple-license/@default-license-id)
+        and the license-id attributes (/description/registration/simple-license/license-text/@license-id).
+        However, since OOo 2.4 we use also the first child as default for the license
+        unless the two attributes are present.
+    */
+    SAL_DLLPRIVATE  css::uno::Reference< css::xml::dom::XNode>
+        getChildWithDefaultLocale(
+        css::uno::Reference< css::xml::dom::XNode > const & xParent) const;
+    /**
+        @param out_bParentExists
+            indicates if the element node specified in sXPathParent exists.
+    */
+    SAL_DLLPRIVATE OUString getLocalizedHREFAttrFromChild(
+        OUString const & sXPathParent, bool * out_bParentExists) const;
+
+    /** Gets the node value for a given expression. The expression is used in
+        m_xpath-selectSingleNode. The value of the returned node is return value
+        of this function.
+    */
+    SAL_DLLPRIVATE OUString
+        getNodeValueFromExpression(OUString const & expression) const;
+
+    /** Check the extensions denylist if additional extension meta data (e.g. dependencies)
+        are defined for this extension and have to be taken into account.
+    */
+    SAL_DLLPRIVATE void
+        checkDenylist() const;
+
+    /** Helper method to compare the versions with the current version
+     */
+    SAL_DLLPRIVATE static bool
+        checkDenylistVersion(std::u16string_view currentversion,
+                              css::uno::Sequence< OUString > const & versions);
+
+    css::uno::Reference< css::uno::XComponentContext > m_context;
+    css::uno::Reference< css::xml::dom::XNode >        m_element;
+    css::uno::Reference< css::xml::xpath::XXPathAPI >  m_xpath;
+};
+
+inline  bool DescriptionInfoset::hasDescription() const
+{
+    return m_element.is();
+}
+
+/** creates a DescriptionInfoset object.
+
+    The argument sExtensionFolderURL is a file URL to extension folder containing
+    the description.xml.
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+DescriptionInfoset getDescriptionInfoset(std::u16string_view sExtensionFolderURL);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_identifier.hxx b/desktop/source/deployment/inc/dp_identifier.hxx
new file mode 100644
index 000000000..bd11170b6
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_identifier.hxx
@@ -0,0 +1,84 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <optional>
+#include <string_view>
+
+#include <com/sun/star/uno/Reference.hxx>
+
+#include "dp_misc_api.hxx"
+
+namespace com::sun::star::deployment {
+    class XPackage;
+}
+
+namespace dp_misc {
+
+/**
+   Generates an identifier from an optional identifier.
+
+   @param optional
+   an optional identifier
+
+   @param fileName
+   a file name
+
+   @return
+   the given optional identifier if present, otherwise a legacy identifier based
+   on the given file name
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC OUString generateIdentifier(
+    ::std::optional< OUString > const & optional,
+    std::u16string_view fileName);
+
+/**
+   Gets the identifier of a package.
+
+   @param package
+   a non-null package
+
+   @return
+   the explicit identifier of the given package if present, otherwise the
+   implicit legacy identifier of the given package
+
+   @throws css::uno::RuntimeException
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC OUString getIdentifier(
+    css::uno::Reference< css::deployment::XPackage >
+        const & package);
+
+/**
+   Generates a legacy identifier based on a file name.
+
+   @param fileName
+   a file name
+
+   @return
+   a legacy identifier based on the given file name
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC OUString generateLegacyIdentifier(
+    std::u16string_view fileName);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_interact.h b/desktop/source/deployment/inc/dp_interact.h
new file mode 100644
index 000000000..6a041d99f
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_interact.h
@@ -0,0 +1,140 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <config_options.h>
+#include <rtl/ref.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/task/XAbortChannel.hpp>
+#include <utility>
+#include "dp_misc_api.hxx"
+
+namespace dp_misc
+{
+
+inline void progressUpdate(
+    OUString const & status,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    if (xCmdEnv.is()) {
+        css::uno::Reference<css::ucb::XProgressHandler> xProgressHandler(
+            xCmdEnv->getProgressHandler() );
+        if (xProgressHandler.is()) {
+            xProgressHandler->update( css::uno::Any(status) );
+        }
+    }
+}
+
+
+class ProgressLevel
+{
+    css::uno::Reference<css::ucb::XProgressHandler> m_xProgressHandler;
+
+public:
+    inline ~ProgressLevel();
+    inline ProgressLevel(
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+        OUString const & status );
+
+    inline void update( OUString const & status ) const;
+    inline void update( css::uno::Any const & status ) const;
+};
+
+
+inline ProgressLevel::ProgressLevel(
+    css::uno::Reference< css::ucb::XCommandEnvironment > const & xCmdEnv,
+    OUString const & status )
+{
+    if (xCmdEnv.is())
+        m_xProgressHandler = xCmdEnv->getProgressHandler();
+    if (m_xProgressHandler.is())
+        m_xProgressHandler->push( css::uno::Any(status) );
+}
+
+
+inline ProgressLevel::~ProgressLevel()
+{
+    if (m_xProgressHandler.is())
+        m_xProgressHandler->pop();
+}
+
+
+inline void ProgressLevel::update( OUString const & status ) const
+{
+    if (m_xProgressHandler.is())
+        m_xProgressHandler->update( css::uno::Any(status) );
+}
+
+
+inline void ProgressLevel::update( css::uno::Any const & status ) const
+{
+    if (m_xProgressHandler.is())
+        m_xProgressHandler->update( status );
+}
+
+
+
+/** @return true if ia handler is present and any selection has been chosen
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC bool interactContinuation(
+    css::uno::Any const & request,
+    css::uno::Type const & continuation,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+    bool * pcont, bool * pabort );
+
+
+
+
+class UNLESS_MERGELIBS(DESKTOP_DEPLOYMENTMISC_DLLPUBLIC) AbortChannel :
+    public ::cppu::WeakImplHelper<css::task::XAbortChannel>
+{
+    bool m_aborted;
+    css::uno::Reference<css::task::XAbortChannel> m_xNext;
+
+public:
+    AbortChannel() : m_aborted( false ) {}
+    static AbortChannel * get(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel )
+        { return static_cast<AbortChannel *>(xAbortChannel.get()); }
+
+    bool isAborted() const { return m_aborted; }
+
+    // XAbortChannel
+    virtual void SAL_CALL sendAbort() override;
+
+    class SAL_DLLPRIVATE Chain
+    {
+        const ::rtl::Reference<AbortChannel> m_abortChannel;
+    public:
+        Chain(
+            ::rtl::Reference<AbortChannel> abortChannel,
+            css::uno::Reference<css::task::XAbortChannel> const & xNext )
+            : m_abortChannel(std::move( abortChannel ))
+            { if (m_abortChannel.is()) m_abortChannel->m_xNext = xNext; }
+        ~Chain()
+            { if (m_abortChannel.is()) m_abortChannel->m_xNext.clear(); }
+    };
+    friend class Chain;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_misc_api.hxx b/desktop/source/deployment/inc/dp_misc_api.hxx
new file mode 100644
index 000000000..ecb07dada
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_misc_api.hxx
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+#include <sal/types.h>
+
+#if defined DESKTOP_DEPLOYMENTMISC_DLLIMPLEMENTATION
+#define DESKTOP_DEPLOYMENTMISC_DLLPUBLIC SAL_DLLPUBLIC_EXPORT
+#else
+#define DESKTOP_DEPLOYMENTMISC_DLLPUBLIC SAL_DLLPUBLIC_IMPORT
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_package.hxx b/desktop/source/deployment/inc/dp_package.hxx
new file mode 100644
index 000000000..f287990f2
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_package.hxx
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <rtl/ustring.hxx>
+
+namespace com::sun::star {
+    namespace deployment { class XPackageRegistry; }
+    namespace uno { class XComponentContext; }
+}
+
+namespace dp_registry::backend::bundle {
+
+css::uno::Reference<css::deployment::XPackageRegistry> create(
+    css::uno::Reference<css::deployment::XPackageRegistry> const &
+        xRootRegistry,
+    OUString const & context, OUString const & cachePath,
+    css::uno::Reference<css::uno::XComponentContext> const & xComponentContext);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_persmap.h b/desktop/source/deployment/inc/dp_persmap.h
new file mode 100644
index 000000000..c36979807
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_persmap.h
@@ -0,0 +1,60 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <osl/file.hxx>
+#include <unordered_map>
+
+namespace dp_misc
+{
+typedef std::unordered_map<OString, OString> t_string2string_map;
+
+// Class to read obsolete registered extensions
+// should be removed for LibreOffice 4.0
+class PersistentMap final
+{
+    ::osl::File m_MapFile;
+    t_string2string_map m_entries;
+    bool m_bIsOpen;
+    bool m_bToBeCreated;
+    bool m_bIsDirty;
+
+public:
+    ~PersistentMap();
+    PersistentMap(OUString const& url);
+    /** in mem db */
+    PersistentMap();
+
+    bool has(OString const& key) const;
+    bool get(OString* value, OString const& key) const;
+    const t_string2string_map& getEntries() const { return m_entries; }
+    void put(OString const& key, OString const& value);
+    bool erase(OString const& key);
+
+private:
+    void open();
+    void readAll();
+    void add(OString const& key, OString const& value);
+    void flush();
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_platform.hxx b/desktop/source/deployment/inc/dp_platform.hxx
new file mode 100644
index 000000000..5e454700d
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_platform.hxx
@@ -0,0 +1,41 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include "dp_misc_api.hxx"
+
+#include <com/sun/star/uno/Sequence.hxx>
+#include <rtl/ustring.hxx>
+
+namespace dp_misc
+{
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC OUString const& getPlatformString();
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+bool platform_fits(std::u16string_view platform_string);
+
+/** determines if the current platform corresponds to one of the platform strings.
+
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+bool hasValidPlatform(css::uno::Sequence<OUString> const& platformStrings);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_registry.hxx b/desktop/source/deployment/inc/dp_registry.hxx
new file mode 100644
index 000000000..76742587e
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_registry.hxx
@@ -0,0 +1,40 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <rtl/ustring.hxx>
+
+namespace com::sun::star {
+    namespace deployment { class XPackageRegistry; }
+    namespace uno { class XComponentContext; }
+}
+
+namespace dp_registry {
+
+css::uno::Reference<css::deployment::XPackageRegistry> create(
+    OUString const & context, OUString const & cachePath,
+    css::uno::Reference<css::uno::XComponentContext> const & xComponentContext);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_resource.h b/desktop/source/deployment/inc/dp_resource.h
new file mode 100644
index 000000000..471960e8d
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_resource.h
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <i18nlangtag/languagetag.hxx>
+#include "dp_misc_api.hxx"
+
+namespace dp_misc
+{
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC const LanguageTag& getOfficeLanguageTag();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_ucb.h b/desktop/source/deployment/inc/dp_ucb.h
new file mode 100644
index 000000000..291b28b9b
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_ucb.h
@@ -0,0 +1,94 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vector>
+#include <com/sun/star/sdbc/XResultSet.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include "dp_misc_api.hxx"
+#include <ucbhelper/content.hxx>
+
+namespace ucbhelper
+{
+class Content;
+}
+
+namespace dp_misc {
+
+struct DESKTOP_DEPLOYMENTMISC_DLLPUBLIC StrTitle
+{
+    static css::uno::Sequence< OUString > getTitleSequence()
+    {
+        css::uno::Sequence<OUString> aSeq { "Title" };
+        return aSeq;
+    }
+    static OUString getTitle( ::ucbhelper::Content &rContent )
+    {
+        return rContent.getPropertyValue("Title").get<OUString>();
+    }
+    // just return titles - the ucbhelper should have a simpler API for this [!]
+    static css::uno::Reference< css::sdbc::XResultSet >
+        createCursor( ::ucbhelper::Content &rContent,
+                      ucbhelper::ResultSetInclude eInclude )
+    {
+        return rContent.createCursor( StrTitle::getTitleSequence(), eInclude );
+    }
+};
+
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC bool create_ucb_content(
+    ::ucbhelper::Content * ucb_content,
+    OUString const & url,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+    bool throw_exc = true );
+
+
+/** @return true if previously non-existing folder has been created
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC bool create_folder(
+    ::ucbhelper::Content * ucb_content,
+    OUString const & url,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+    bool throw_exc = true );
+
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC bool erase_path(
+    OUString const & url,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+    bool throw_exc = true );
+
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+std::vector<sal_Int8> readFile( ::ucbhelper::Content & ucb_content );
+
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+bool readLine( OUString * res, OUString const & startingWith,
+               ::ucbhelper::Content & ucb_content, rtl_TextEncoding textenc );
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+bool readProperties( std::vector< std::pair< OUString, OUString> > & out_result,
+                ::ucbhelper::Content & ucb_content);
+
+
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_update.hxx b/desktop/source/deployment/inc/dp_update.hxx
new file mode 100644
index 000000000..8dce9b583
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_update.hxx
@@ -0,0 +1,136 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/deployment/XExtensionManager.hpp>
+#include <com/sun/star/deployment/XUpdateInformationProvider.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/xml/dom/XNode.hpp>
+
+#include "dp_misc_api.hxx"
+
+#include <map>
+#include <vector>
+
+namespace dp_misc {
+
+/** returns the default update URL (for the update information) which
+    is used when an extension does not provide its own URL.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+OUString getExtensionDefaultUpdateURL();
+
+enum UPDATE_SOURCE
+{
+    UPDATE_SOURCE_NONE,
+    UPDATE_SOURCE_SHARED,
+    UPDATE_SOURCE_BUNDLED,
+    UPDATE_SOURCE_ONLINE
+};
+
+/* determine if an update is available which is installed in the
+   user repository.
+
+   If the return value is UPDATE_SOURCE_NONE, then no update is
+   available, otherwise the return value determine from which the
+   repository the update is used.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+UPDATE_SOURCE isUpdateUserExtension(
+    bool bReadOnlyShared,
+    OUString const & userVersion,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion);
+
+/* determine if an update is available which is installed in the
+   shared repository.
+
+   If the return value is UPDATE_SOURCE_NONE, then no update is
+   available, otherwise the return value determine from which the
+   repository the update is used.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+UPDATE_SOURCE isUpdateSharedExtension(
+    bool bReadOnlyShared,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion);
+
+/* determines the extension with the highest identifier and returns it
+
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+css::uno::Reference< css::deployment::XPackage>
+getExtensionWithHighestVersion(
+    css::uno::Sequence<
+    css::uno::Reference<
+    css::deployment::XPackage> > const & seqExtensionsWithSameId);
+
+
+struct UpdateInfo
+{
+    UpdateInfo( css::uno::Reference< css::deployment::XPackage> const & ext);
+
+    css::uno::Reference<  css::deployment::XPackage> extension;
+    //version of the update
+    OUString version;
+    css::uno::Reference< css::xml::dom::XNode > info;
+};
+
+typedef std::map< OUString, UpdateInfo > UpdateInfoMap;
+
+/*
+  @param extensionList
+  List of extension for which online update information is to be obtained. If NULL, then
+  for update information is obtained for all installed extension. There may be only one extension
+  with a particular identifier contained in the list. If one extension is installed
+  in several repositories, then the one with the highest version must be used, because it contains
+  the more recent URLs for getting the update information (if at all).
+  @param out_errors
+  the first member of the pair is the extension  and the second the exception that was produced
+  when processing the extension.
+
+  @return
+  A map of UpdateInfo instances. If the parameter extensionList was given, then the map contains
+  at only information for those extensions.
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+UpdateInfoMap getOnlineUpdateInfos(
+    css::uno::Reference< css::uno::XComponentContext> const &xContext,
+    css::uno::Reference< css::deployment::XExtensionManager> const & xExtMgr,
+    css::uno::Reference< css::deployment::XUpdateInformationProvider > const & updateInformation,
+    std::vector< css::uno::Reference< css::deployment::XPackage > > const * extensionList,
+    std::vector< std::pair< css::uno::Reference<
+    css::deployment::XPackage>, css::uno::Any> > & out_errors);
+
+/* returns the highest version from the provided arguments.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+OUString getHighestVersion(
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_version.hxx b/desktop/source/deployment/inc/dp_version.hxx
new file mode 100644
index 000000000..342e2bf8c
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_version.hxx
@@ -0,0 +1,36 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <rtl/ustring.hxx>
+#include "dp_misc_api.hxx"
+
+
+namespace dp_misc {
+
+enum Order { LESS, EQUAL, GREATER };
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC Order compareVersions(
+    OUString const & version1, OUString const & version2);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_xml.h b/desktop/source/deployment/inc/dp_xml.h
new file mode 100644
index 000000000..608073328
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_xml.h
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/xml/sax/XDocumentHandler.hpp>
+
+
+namespace ucbhelper
+{
+class Content;
+}
+
+namespace dp_misc
+{
+
+
+void xml_parse(
+    css::uno::Reference< css::xml::sax::XDocumentHandler > const & xDocHandler,
+    ::ucbhelper::Content & ucb_content,
+    css::uno::Reference< css::uno::XComponentContext > const & xContext );
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/lockfile.hxx b/desktop/source/deployment/inc/lockfile.hxx
new file mode 100644
index 000000000..982a0c2f0
--- /dev/null
+++ b/desktop/source/deployment/inc/lockfile.hxx
@@ -0,0 +1,89 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+/* Information:
+ * This class implements a mechanism to lock a users installation directory,
+ * which is necessary because instances of staroffice could be running on
+ * different hosts while using the same directory thus causing data
+ * inconsistency.
+ * When an existing lock is detected, the user will be asked whether he wants
+ * to continue anyway, thus removing the lock and replacing it with a new one
+ *
+ * ideas:
+ * - store information about user and host and time in the lockfile and display
+ * these when asking whether to remove the lockfile.
+ * - periodically check the lockfile and warn the user when it gets replaced
+ *
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+
+#include "dp_misc_api.hxx"
+
+#define LOCKFILE_GROUP    "Lockdata"
+#define LOCKFILE_USERKEY  "User"
+#define LOCKFILE_HOSTKEY  "Host"
+#define LOCKFILE_STAMPKEY "Stamp"
+#define LOCKFILE_TIMEKEY  "Time"
+#define LOCKFILE_IPCKEY   "IPCServer"
+
+namespace desktop {
+
+    class Lockfile;
+    bool Lockfile_execWarning( Lockfile const * that );
+
+    class DESKTOP_DEPLOYMENTMISC_DLLPUBLIC Lockfile
+    {
+    public:
+
+        // constructs a new lockfile object
+        Lockfile( bool bIPCserver = true );
+
+        // separating GUI code:
+        typedef bool (* fpExecWarning)( Lockfile const * that );
+
+        // checks the lockfile, asks user when lockfile is
+        // found (iff gui) and returns false when we may not continue
+        bool check( fpExecWarning execWarning );
+
+        // removes the lockfile
+        ~Lockfile();
+
+    private:
+        bool m_bIPCserver;
+        // full qualified name (file://-url) of the lockfile
+        OUString m_aLockname;
+        // flag whether the d'tor should delete the lock
+        bool m_bRemove;
+        bool m_bIsLocked;
+        // ID
+        OUString m_aId;
+        OUString m_aDate;
+        // access to data in file
+        void syncToFile() const;
+        bool isStale() const;
+        friend bool Lockfile_execWarning( Lockfile const * that );
+
+    };
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_activepackages.cxx b/desktop/source/deployment/manager/dp_activepackages.cxx
new file mode 100644
index 000000000..c1c5f2b28
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_activepackages.cxx
@@ -0,0 +1,217 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_extensions.h>
+
+#include <sal/config.h>
+
+#include <string_view>
+#include <utility>
+
+#include <osl/diagnose.h>
+#include <rtl/string.hxx>
+#include <rtl/textenc.h>
+#include <rtl/ustring.hxx>
+
+#include <dp_identifier.hxx>
+#include "dp_activepackages.hxx"
+
+// Old format of database entry:
+//   key: UTF8(filename)
+//   value: UTF8(tempname ";" mediatype)
+// New format of database entry:
+//   key: 0xFF UTF8(identifier)
+//   value: UTF8(tempname) 0xFF UTF8(filename) 0xFF UTF8(mediatype)
+
+#if HAVE_FEATURE_EXTENSIONS
+
+namespace {
+
+constexpr const char separator[] = "\xff";
+
+OString oldKey(std::u16string_view fileName) {
+    return OUStringToOString(fileName, RTL_TEXTENCODING_UTF8);
+}
+
+OString newKey(std::u16string_view id) {
+    return separator + OUStringToOString(id, RTL_TEXTENCODING_UTF8);
+}
+
+::dp_manager::ActivePackages::Data decodeOldData(
+    OUString const & fileName, OString const & value)
+{
+    ::dp_manager::ActivePackages::Data d;
+    sal_Int32 i = value.indexOf(';');
+    OSL_ASSERT(i >= 0);
+    d.temporaryName = OUString(value.getStr(), i, RTL_TEXTENCODING_UTF8);
+    d.fileName = fileName;
+    d.mediaType = OUString(
+        value.getStr() + i + 1, value.getLength() - i - 1,
+        RTL_TEXTENCODING_UTF8);
+    return d;
+}
+
+::dp_manager::ActivePackages::Data decodeNewData(OString const & value) {
+    ::dp_manager::ActivePackages::Data d;
+    sal_Int32 i1 = value.indexOf(separator);
+    OSL_ASSERT(i1 >= 0);
+    d.temporaryName = OUString(
+        value.getStr(), i1, RTL_TEXTENCODING_UTF8);
+    sal_Int32 i2 = value.indexOf(separator, i1 + 1);
+    OSL_ASSERT(i2 >= 0);
+    d.fileName = OUString(
+        value.getStr() + i1 + 1, i2 - i1 - 1, RTL_TEXTENCODING_UTF8);
+    sal_Int32 i3 = value.indexOf(separator, i2 + 1);
+
+    if (i3 < 0)
+    {
+        //Before ActivePackages::Data::version was added
+        d.mediaType = OUString(
+            value.getStr() + i2 + 1, value.getLength() - i2 - 1,
+            RTL_TEXTENCODING_UTF8);
+    }
+    else
+    {
+        sal_Int32 i4 = value.indexOf(separator, i3 + 1);
+        d.mediaType = OUString(
+            value.getStr() + i2 + 1, i3 - i2 -1, RTL_TEXTENCODING_UTF8);
+        d.version = OUString(
+            value.getStr() + i3 + 1, i4 - i3 - 1,
+            RTL_TEXTENCODING_UTF8);
+        d.failedPrerequisites = OUString(
+            value.getStr() + i4 + 1, value.getLength() - i4 - 1,
+            RTL_TEXTENCODING_UTF8);
+    }
+    return d;
+}
+
+}
+#endif
+
+namespace dp_manager {
+
+ActivePackages::ActivePackages() {}
+
+ActivePackages::ActivePackages(OUString const & url)
+#if HAVE_FEATURE_EXTENSIONS
+    : m_map(url)
+#endif
+{
+#if !HAVE_FEATURE_EXTENSIONS
+    (void) url;
+#endif
+}
+
+ActivePackages::~ActivePackages() {}
+
+bool ActivePackages::has(
+    OUString const & id, OUString const & fileName) const
+{
+    return get(nullptr, id, fileName);
+}
+
+bool ActivePackages::get(
+    Data * data, OUString const & id, OUString const & fileName)
+    const
+{
+#if HAVE_FEATURE_EXTENSIONS
+    OString v;
+    if (m_map.get(&v, newKey(id))) {
+        if (data != nullptr) {
+            *data = decodeNewData(v);
+        }
+        return true;
+    } else if (m_map.get(&v, oldKey(fileName))) {
+        if (data != nullptr) {
+            *data = decodeOldData(fileName, v);
+        }
+        return true;
+    } else {
+        return false;
+    }
+#else
+    (void) data;
+    (void) id;
+    (void) fileName;
+    (void) this;
+    return false;
+#endif
+}
+
+ActivePackages::Entries ActivePackages::getEntries() const {
+    Entries es;
+#if HAVE_FEATURE_EXTENSIONS
+    ::dp_misc::t_string2string_map m(m_map.getEntries());
+    for (auto const& elem : m)
+    {
+        if (!elem.first.isEmpty() && elem.first[0] == separator[0]) {
+            es.emplace_back(
+                    OUString(
+                        elem.first.getStr() + 1, elem.first.getLength() - 1,
+                        RTL_TEXTENCODING_UTF8),
+                    decodeNewData(elem.second));
+        } else {
+            OUString fn(
+                OStringToOUString(elem.first, RTL_TEXTENCODING_UTF8));
+            es.emplace_back(
+                    ::dp_misc::generateLegacyIdentifier(fn),
+                    decodeOldData(fn, elem.second));
+        }
+    }
+#else
+    (void) this;
+#endif
+    return es;
+}
+
+void ActivePackages::put(OUString const & id, Data const & data) {
+#if HAVE_FEATURE_EXTENSIONS
+    OString b =
+        OUStringToOString(data.temporaryName, RTL_TEXTENCODING_UTF8) +
+        separator +
+        OUStringToOString(data.fileName, RTL_TEXTENCODING_UTF8) +
+        separator +
+        OUStringToOString(data.mediaType, RTL_TEXTENCODING_UTF8) +
+        separator +
+        OUStringToOString(data.version, RTL_TEXTENCODING_UTF8) +
+        separator +
+        OUStringToOString(data.failedPrerequisites, RTL_TEXTENCODING_UTF8);
+    m_map.put(newKey(id), b);
+#else
+    (void) id;
+    (void) data;
+    (void) this;
+#endif
+}
+
+void ActivePackages::erase(
+    OUString const & id, OUString const & fileName)
+{
+#if HAVE_FEATURE_EXTENSIONS
+    m_map.erase(newKey(id)) || m_map.erase(oldKey(fileName));
+#else
+    (void) id;
+    (void) fileName;
+    (void) this;
+#endif
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_activepackages.hxx b/desktop/source/deployment/manager/dp_activepackages.hxx
new file mode 100644
index 000000000..fae938019
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_activepackages.hxx
@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <config_extensions.h>
+
+#include <sal/config.h>
+#include <rtl/ustring.hxx>
+
+#include <utility>
+#include <vector>
+
+#if HAVE_FEATURE_EXTENSIONS
+#include <dp_persmap.h>
+#endif
+
+
+namespace dp_manager {
+
+class ActivePackages {
+public:
+    struct Data {
+        Data(): failedPrerequisites("0")
+            {}
+        /* name of the temporary file (shared, user extension) or the name of
+           the folder of the bundled extension.
+           It does not contain the trailing '_' of the folder.
+           UTF-8 encoded
+        */
+        OUString temporaryName;
+        /* The file name (shared, user) or the folder name (bundled)
+           If the key is the file name, then file name is not encoded.
+           If the key is the identifier then the file name is UTF-8 encoded.
+         */
+        OUString fileName;
+        OUString mediaType;
+        OUString version;
+        /* If this string contains the value according to
+           css::deployment::Prerequisites or "0". That is, if
+           the value is > 0 then
+           the call to XPackage::checkPrerequisites failed.
+           In this case the extension must not be registered.
+         */
+        OUString failedPrerequisites;
+    };
+
+    typedef std::vector< std::pair< OUString, Data > > Entries;
+
+    ActivePackages();
+
+    explicit ActivePackages(OUString const & url);
+
+    ~ActivePackages();
+
+    bool has(OUString const & id, OUString const & fileName)
+        const;
+
+    bool get(
+        Data * data, OUString const & id,
+        OUString const & fileName) const;
+
+    Entries getEntries() const;
+
+    void put(OUString const & id, Data const & value);
+
+    void erase(OUString const & id, OUString const & fileName);
+
+private:
+    ActivePackages(ActivePackages const &) = delete;
+    ActivePackages& operator =(ActivePackages const &) = delete;
+#if HAVE_FEATURE_EXTENSIONS
+    ::dp_misc::PersistentMap m_map;
+#endif
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_commandenvironments.cxx b/desktop/source/deployment/manager/dp_commandenvironments.cxx
new file mode 100644
index 000000000..0a25e042f
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_commandenvironments.cxx
@@ -0,0 +1,246 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <com/sun/star/deployment/VersionException.hpp>
+#include <com/sun/star/deployment/LicenseException.hpp>
+#include <com/sun/star/deployment/InstallException.hpp>
+#include <com/sun/star/deployment/DependencyException.hpp>
+#include <com/sun/star/deployment/PlatformException.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <utility>
+#include "dp_commandenvironments.hxx"
+#include <osl/diagnose.h>
+
+namespace deployment = com::sun::star::deployment;
+namespace task = com::sun::star::task;
+namespace ucb = com::sun::star::ucb;
+namespace uno = com::sun::star::uno;
+
+using ::com::sun::star::uno::Reference;
+
+namespace dp_manager {
+
+BaseCommandEnv::BaseCommandEnv()
+{
+}
+
+BaseCommandEnv::BaseCommandEnv(
+    Reference< task::XInteractionHandler> const & handler)
+    : m_forwardHandler(handler)
+{
+}
+
+BaseCommandEnv::~BaseCommandEnv()
+{
+}
+// XCommandEnvironment
+
+Reference<task::XInteractionHandler> BaseCommandEnv::getInteractionHandler()
+{
+    return this;
+}
+
+
+Reference<ucb::XProgressHandler> BaseCommandEnv::getProgressHandler()
+{
+    return this;
+}
+
+void BaseCommandEnv::handle(
+    Reference< task::XInteractionRequest> const & /*xRequest*/ )
+{
+}
+
+void BaseCommandEnv::handle_(bool approve,
+                             Reference< task::XInteractionRequest> const & xRequest )
+{
+    if (!approve)
+    {
+        //not handled so far -> forwarding
+        if (m_forwardHandler.is())
+            m_forwardHandler->handle(xRequest);
+        else
+            return; //cannot handle
+    }
+    else
+    {
+        // select:
+        uno::Sequence< Reference< task::XInteractionContinuation > > conts(
+            xRequest->getContinuations() );
+        Reference< task::XInteractionContinuation > const * pConts =
+            conts.getConstArray();
+        sal_Int32 len = conts.getLength();
+        for ( sal_Int32 pos = 0; pos < len; ++pos )
+        {
+            if (approve) {
+                Reference< task::XInteractionApprove > xInteractionApprove(
+                    pConts[ pos ], uno::UNO_QUERY );
+                if (xInteractionApprove.is()) {
+                    xInteractionApprove->select();
+                    // don't query again for ongoing continuations:
+                    approve = false;
+                }
+            }
+        }
+    }
+
+}
+
+// XProgressHandler
+void BaseCommandEnv::push( uno::Any const & /*Status*/ )
+{
+}
+
+void BaseCommandEnv::update( uno::Any const & /*Status */)
+{
+}
+
+void BaseCommandEnv::pop()
+{
+}
+
+
+TmpRepositoryCommandEnv::TmpRepositoryCommandEnv()
+{
+}
+
+TmpRepositoryCommandEnv::TmpRepositoryCommandEnv(
+    css::uno::Reference< css::task::XInteractionHandler> const & handler):
+    BaseCommandEnv(handler)
+{
+}
+// XInteractionHandler
+void TmpRepositoryCommandEnv::handle(
+    Reference< task::XInteractionRequest> const & xRequest )
+{
+    uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == uno::TypeClass_EXCEPTION );
+
+    deployment::VersionException verExc;
+    deployment::LicenseException licExc;
+    deployment::InstallException instExc;
+
+    bool approve = false;
+
+    if ((request >>= verExc)
+        || (request >>= licExc)
+        || (request >>= instExc))
+    {
+        approve = true;
+    }
+
+    handle_(approve, xRequest);
+}
+
+
+LicenseCommandEnv::LicenseCommandEnv(
+    css::uno::Reference< css::task::XInteractionHandler> const & handler,
+    bool bSuppressLicense,
+    OUString repository):
+    BaseCommandEnv(handler), m_repository(std::move(repository)),
+    m_bSuppressLicense(bSuppressLicense)
+{
+}
+// XInteractionHandler
+void LicenseCommandEnv::handle(
+    Reference< task::XInteractionRequest> const & xRequest )
+{
+    uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == uno::TypeClass_EXCEPTION );
+
+    deployment::LicenseException licExc;
+
+    bool approve = false;
+
+    if (request >>= licExc)
+    {
+        if (m_bSuppressLicense
+            || m_repository == "bundled"
+            || licExc.AcceptBy == "admin")
+        {
+            //always approve in bundled case, because we do not support
+            //showing licenses anyway.
+            //The "admin" already accepted the license when installing the
+            // shared extension
+            approve = true;
+        }
+    }
+
+    handle_(approve, xRequest);
+}
+
+
+NoLicenseCommandEnv::NoLicenseCommandEnv(
+    css::uno::Reference< css::task::XInteractionHandler> const & handler):
+    BaseCommandEnv(handler)
+{
+}
+// XInteractionHandler
+void NoLicenseCommandEnv::handle(
+    Reference< task::XInteractionRequest> const & xRequest )
+{
+    uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == uno::TypeClass_EXCEPTION );
+
+    deployment::LicenseException licExc;
+
+    bool approve = false;
+
+    if (request >>= licExc)
+    {
+        approve = true;
+    }
+    handle_(approve, xRequest);
+}
+
+SilentCheckPrerequisitesCommandEnv::SilentCheckPrerequisitesCommandEnv()
+{
+}
+
+void SilentCheckPrerequisitesCommandEnv::handle(
+       Reference< task::XInteractionRequest> const & xRequest )
+{
+    uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == uno::TypeClass_EXCEPTION );
+
+    deployment::LicenseException licExc;
+    deployment::PlatformException platformExc;
+    deployment::DependencyException depExc;
+
+    if (request >>= licExc)
+    {
+        handle_(true, xRequest); // approve = true
+    }
+    else if ((request >>= platformExc)
+             || (request >>= depExc))
+    {
+        m_Exception = request;
+    }
+    else
+    {
+        m_UnknownException = request;
+    }
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_commandenvironments.hxx b/desktop/source/deployment/manager/dp_commandenvironments.hxx
new file mode 100644
index 000000000..6533d45b4
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_commandenvironments.hxx
@@ -0,0 +1,139 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/task/XInteractionRequest.hpp>
+#include <com/sun/star/ucb/XProgressHandler.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+
+
+namespace dp_manager {
+
+/**
+   This command environment is to be used when an extension is temporarily
+   stored in the "tmp" repository. It prevents all kind of user interaction.
+ */
+class BaseCommandEnv
+    : public ::cppu::WeakImplHelper< css::ucb::XCommandEnvironment,
+                                      css::task::XInteractionHandler,
+                                      css::ucb::XProgressHandler >
+{
+    css::uno::Reference< css::task::XInteractionHandler> m_forwardHandler;
+protected:
+    void handle_(bool approve,
+                 css::uno::Reference< css::task::XInteractionRequest> const & xRequest );
+public:
+    virtual ~BaseCommandEnv() override;
+    BaseCommandEnv();
+    explicit BaseCommandEnv(
+        css::uno::Reference< css::task::XInteractionHandler> const & handler);
+
+    // XCommandEnvironment
+    virtual css::uno::Reference<css::task::XInteractionHandler > SAL_CALL
+    getInteractionHandler() override;
+    virtual css::uno::Reference<css::ucb::XProgressHandler >
+    SAL_CALL getProgressHandler() override;
+
+    // XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+    // XProgressHandler
+    virtual void SAL_CALL push( css::uno::Any const & Status ) override;
+    virtual void SAL_CALL update( css::uno::Any const & Status ) override;
+    virtual void SAL_CALL pop() override;
+};
+
+class TmpRepositoryCommandEnv : public BaseCommandEnv
+{
+public:
+    TmpRepositoryCommandEnv();
+    explicit TmpRepositoryCommandEnv(css::uno::Reference< css::task::XInteractionHandler> const & handler);
+
+// XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+};
+
+/** this class is for use in XPackageManager::synchronize.
+
+    It handles particular license cases.
+ */
+class LicenseCommandEnv : public BaseCommandEnv
+{
+private:
+    OUString m_repository;
+    bool m_bSuppressLicense;
+public:
+    LicenseCommandEnv(
+        css::uno::Reference< css::task::XInteractionHandler> const & handler,
+        bool bSuppressLicense,
+        OUString repository);
+
+// XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+};
+
+/** this class is for use in XPackageManager::checkPrerequisites
+
+    It always prohibits a license interaction
+ */
+class NoLicenseCommandEnv : public BaseCommandEnv
+{
+
+public:
+    explicit NoLicenseCommandEnv(css::uno::Reference< css::task::XInteractionHandler> const & handler);
+
+// XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+};
+
+/* For use in XExtensionManager::addExtension in the call to
+   XPackage::checkPrerequisites
+   It prevents all user interactions. The license is always accepted.
+   It remembers if there was a platform or a dependency exception in
+   the member m_bException. if there was any other exception then m_bUnknownException
+   is set.
+
+ */
+class SilentCheckPrerequisitesCommandEnv : public BaseCommandEnv
+{
+public:
+    SilentCheckPrerequisitesCommandEnv();
+    // XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+    // Set to true if a PlatformException or a DependencyException were handled.
+    css::uno::Any m_Exception;
+    // Set to true if an unknown exception was handled.
+    css::uno::Any m_UnknownException;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_extensionmanager.cxx b/desktop/source/deployment/manager/dp_extensionmanager.cxx
new file mode 100644
index 000000000..fc7816f6a
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_extensionmanager.cxx
@@ -0,0 +1,1432 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <rtl/bootstrap.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/XExtensionManager.hpp>
+#include <com/sun/star/deployment/thePackageManagerFactory.hpp>
+#include <com/sun/star/deployment/XPackageManager.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/deployment/InstallException.hpp>
+#include <com/sun/star/deployment/VersionException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+#include <com/sun/star/beans/Ambiguous.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/util/XModifyBroadcaster.hpp>
+#include <comphelper/sequence.hxx>
+#include <utility>
+#include <xmlscript/xml_helper.hxx>
+#include <osl/diagnose.h>
+#include <dp_interact.h>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <dp_identifier.hxx>
+#include <dp_descriptioninfoset.hxx>
+#include "dp_extensionmanager.hxx"
+#include "dp_commandenvironments.hxx"
+#include "dp_properties.hxx"
+
+#include <vector>
+#include <algorithm>
+#include <set>
+#include <string_view>
+
+namespace lang  = com::sun::star::lang;
+namespace task = com::sun::star::task;
+namespace ucb = com::sun::star::ucb;
+namespace uno = com::sun::star::uno;
+namespace beans = com::sun::star::beans;
+namespace util = com::sun::star::util;
+
+using ::com::sun::star::uno::Reference;
+
+namespace {
+
+struct CompIdentifiers
+{
+    bool operator() (std::vector<Reference<css::deployment::XPackage> > const & a,
+                     std::vector<Reference<css::deployment::XPackage> > const & b)
+        {
+            return getName(a).compareTo(getName(b)) < 0;
+        }
+
+    static OUString getName(std::vector<Reference<css::deployment::XPackage> > const & a);
+};
+
+OUString CompIdentifiers::getName(std::vector<Reference<css::deployment::XPackage> > const & a)
+{
+    OSL_ASSERT(a.size() == 3);
+    //get the first non-null reference
+    Reference<css::deployment::XPackage>  extension;
+    for (auto const& elem : a)
+    {
+        if (elem.is())
+        {
+            extension = elem;
+            break;
+        }
+    }
+    OSL_ASSERT(extension.is());
+    return extension->getDisplayName();
+}
+
+void writeLastModified(OUString & url, Reference<ucb::XCommandEnvironment> const & xCmdEnv, Reference< uno::XComponentContext > const & xContext)
+{
+    //Write the lastmodified file
+    try {
+        ::rtl::Bootstrap::expandMacros(url);
+        ::ucbhelper::Content ucbStamp(url, xCmdEnv, xContext);
+        dp_misc::erase_path( url, xCmdEnv );
+        OString stamp("1" );
+        Reference<css::io::XInputStream> xData(
+            ::xmlscript::createInputStream(
+                    reinterpret_cast<sal_Int8 const *>(stamp.getStr()),
+                    stamp.getLength() ) );
+        ucbStamp.writeStream( xData, true /* replace existing */ );
+    }
+    catch(...)
+    {
+        uno::Any exc(::cppu::getCaughtException());
+        throw css::deployment::DeploymentException("Failed to update" + url, nullptr, exc);
+    }
+}
+
+class ExtensionRemoveGuard
+{
+    css::uno::Reference<css::deployment::XPackage> m_extension;
+    css::uno::Reference<css::deployment::XPackageManager> m_xPackageManager;
+
+public:
+    ExtensionRemoveGuard(){};
+    ExtensionRemoveGuard(
+        css::uno::Reference<css::deployment::XPackage> extension,
+        css::uno::Reference<css::deployment::XPackageManager> xPackageManager):
+        m_extension(std::move(extension)), m_xPackageManager(std::move(xPackageManager)) {}
+    ~ExtensionRemoveGuard();
+
+    void set(css::uno::Reference<css::deployment::XPackage> const & extension,
+             css::uno::Reference<css::deployment::XPackageManager> const & xPackageManager) {
+        m_extension = extension;
+        m_xPackageManager = xPackageManager;
+    }
+};
+
+ExtensionRemoveGuard::~ExtensionRemoveGuard()
+{
+    try {
+        OSL_ASSERT(!(m_extension.is() && !m_xPackageManager.is()));
+        if (m_xPackageManager.is() && m_extension.is())
+            m_xPackageManager->removePackage(
+                dp_misc::getIdentifier(m_extension), OUString(),
+                css::uno::Reference<css::task::XAbortChannel>(),
+                css::uno::Reference<css::ucb::XCommandEnvironment>());
+    } catch (...) {
+        OSL_ASSERT(false);
+    }
+}
+
+}
+
+namespace dp_manager {
+
+//ToDo: bundled extension
+ExtensionManager::ExtensionManager( Reference< uno::XComponentContext > const& xContext) :
+    ::cppu::WeakComponentImplHelper< css::deployment::XExtensionManager, css::lang::XServiceInfo >(m_aMutex)
+    , m_xContext(xContext)
+{
+    m_xPackageManagerFactory = css::deployment::thePackageManagerFactory::get(m_xContext);
+    OSL_ASSERT(m_xPackageManagerFactory.is());
+
+    m_repositoryNames.emplace_back("user");
+    m_repositoryNames.emplace_back("shared");
+    m_repositoryNames.emplace_back("bundled");
+}
+
+ExtensionManager::~ExtensionManager()
+{
+}
+
+// XServiceInfo
+OUString ExtensionManager::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.ExtensionManager";
+}
+
+sal_Bool ExtensionManager::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > ExtensionManager::getSupportedServiceNames()
+{
+    // a private one:
+    return { "com.sun.star.comp.deployment.ExtensionManager" };
+}
+
+Reference<css::deployment::XPackageManager> ExtensionManager::getUserRepository()
+{
+    return m_xPackageManagerFactory->getPackageManager("user");
+}
+Reference<css::deployment::XPackageManager>  ExtensionManager::getSharedRepository()
+{
+    return m_xPackageManagerFactory->getPackageManager("shared");
+}
+Reference<css::deployment::XPackageManager>  ExtensionManager::getBundledRepository()
+{
+    return m_xPackageManagerFactory->getPackageManager("bundled");
+}
+Reference<css::deployment::XPackageManager>  ExtensionManager::getTmpRepository()
+{
+    return m_xPackageManagerFactory->getPackageManager("tmp");
+}
+Reference<css::deployment::XPackageManager>  ExtensionManager::getBakRepository()
+{
+    return m_xPackageManagerFactory->getPackageManager("bak");
+}
+
+Reference<task::XAbortChannel> ExtensionManager::createAbortChannel()
+{
+    return new dp_misc::AbortChannel;
+}
+
+css::uno::Reference<css::deployment::XPackageManager>
+ExtensionManager::getPackageManager(std::u16string_view repository)
+{
+    Reference<css::deployment::XPackageManager> xPackageManager;
+    if (repository == u"user")
+        xPackageManager = getUserRepository();
+    else if (repository == u"shared")
+        xPackageManager = getSharedRepository();
+    else if (repository == u"bundled")
+        xPackageManager = getBundledRepository();
+    else if (repository == u"tmp")
+        xPackageManager = getTmpRepository();
+    else if (repository == u"bak")
+        xPackageManager = getBakRepository();
+    else
+        throw lang::IllegalArgumentException(
+            "No valid repository name provided.",
+            static_cast<cppu::OWeakObject*>(this), 0);
+    return xPackageManager;
+}
+
+/*
+  Enters the XPackage objects into a map. They must be all from the
+  same repository. The value type of the map is a vector, where each vector
+  represents an extension with a particular identifier. The first member
+  represents the user extension, the second the shared extension and the
+  third the bundled extension.
+ */
+void ExtensionManager::addExtensionsToMap(
+    id2extensions & mapExt,
+    uno::Sequence<Reference<css::deployment::XPackage> > const & seqExt,
+    std::u16string_view repository)
+{
+    //Determine the index in the vector where these extensions are to be
+    //added.
+    int index = 0;
+    for (auto const& repositoryName : m_repositoryNames)
+    {
+        if (repositoryName == repository)
+            break;
+        ++index;
+    }
+
+    for (const Reference<css::deployment::XPackage>& xExtension : seqExt)
+    {
+        OUString id = dp_misc::getIdentifier(xExtension);
+        id2extensions::iterator ivec =  mapExt.find(id);
+        if (ivec == mapExt.end())
+        {
+            std::vector<Reference<css::deployment::XPackage> > vec(3);
+            vec[index] = xExtension;
+            mapExt[id] = vec;
+        }
+        else
+        {
+            ivec->second[index] = xExtension;
+        }
+    }
+}
+
+/*
+   returns a list containing extensions with the same identifier from
+   all repositories (user, shared, bundled). If one repository does not
+   have this extension, then the list contains an empty Reference. The list
+   is ordered according to the priority of the repositories:
+   1. user
+   2. shared
+   3. bundled
+
+   The number of elements is always three, unless the number of repository
+   changes.
+ */
+std::vector<Reference<css::deployment::XPackage> >
+    ExtensionManager::getExtensionsWithSameId(
+        OUString const & identifier, OUString const & fileName)
+
+{
+    std::vector<Reference<css::deployment::XPackage> > extensionList;
+    Reference<css::deployment::XPackageManager> lRepos[] = {
+          getUserRepository(), getSharedRepository(), getBundledRepository() };
+    for (int i(0); i != SAL_N_ELEMENTS(lRepos); ++i)
+    {
+        Reference<css::deployment::XPackage> xPackage;
+        try
+        {
+            xPackage = lRepos[i]->getDeployedPackage(
+                identifier, fileName, Reference<ucb::XCommandEnvironment>());
+        }
+        catch(const lang::IllegalArgumentException &)
+        {
+            // thrown if the extension does not exist in this repository
+        }
+        extensionList.push_back(xPackage);
+    }
+    OSL_ASSERT(extensionList.size() == 3);
+    return extensionList;
+}
+
+uno::Sequence<Reference<css::deployment::XPackage> >
+ExtensionManager::getExtensionsWithSameIdentifier(
+        OUString const & identifier,
+        OUString const & fileName,
+        Reference< ucb::XCommandEnvironment> const & /*xCmdEnv*/ )
+{
+    try
+    {
+        std::vector<Reference<css::deployment::XPackage> > listExtensions =
+            getExtensionsWithSameId(identifier, fileName);
+        bool bHasExtension = false;
+
+        //throw an IllegalArgumentException if there is no extension at all.
+        for (auto const& extension : listExtensions)
+            bHasExtension |= extension.is();
+        if (!bHasExtension)
+            throw lang::IllegalArgumentException(
+                "Could not find extension: " + identifier + ", " + fileName,
+                static_cast<cppu::OWeakObject*>(this), -1);
+
+        return comphelper::containerToSequence(listExtensions);
+    }
+    catch ( const css::deployment::DeploymentException & )
+    {
+        throw;
+    }
+    catch ( const ucb::CommandFailedException & )
+    {
+        throw;
+    }
+    catch (css::uno::RuntimeException &)
+    {
+        throw;
+    }
+    catch (...)
+    {
+        uno::Any exc = ::cppu::getCaughtException();
+        throw css::deployment::DeploymentException(
+            "Extension Manager: exception during getExtensionsWithSameIdentifier",
+            static_cast<OWeakObject*>(this), exc);
+    }
+}
+
+bool ExtensionManager::isUserDisabled(
+    OUString const & identifier, OUString const & fileName)
+{
+    std::vector<Reference<css::deployment::XPackage> > listExtensions;
+
+    try {
+        listExtensions = getExtensionsWithSameId(identifier, fileName);
+    } catch ( const lang::IllegalArgumentException & ) {
+    }
+    OSL_ASSERT(listExtensions.size() == 3);
+
+    return isUserDisabled( ::comphelper::containerToSequence(listExtensions) );
+}
+
+bool ExtensionManager::isUserDisabled(
+    uno::Sequence<Reference<css::deployment::XPackage> > const & seqExtSameId)
+{
+    OSL_ASSERT(seqExtSameId.getLength() == 3);
+    Reference<css::deployment::XPackage> const & userExtension = seqExtSameId[0];
+    if (userExtension.is())
+    {
+        beans::Optional<beans::Ambiguous<sal_Bool> > reg =
+            userExtension->isRegistered(Reference<task::XAbortChannel>(),
+                                        Reference<ucb::XCommandEnvironment>());
+        //If the value is ambiguous, then we assume that the extension
+        //is enabled, but something went wrong during enabling. We do not
+        //automatically disable user extensions.
+        if (reg.IsPresent &&
+            ! reg.Value.IsAmbiguous && ! reg.Value.Value)
+            return true;
+    }
+    return false;
+}
+
+/*
+    This method determines the active extension (XPackage.registerPackage) with a
+    particular identifier.
+
+    The parameter bUserDisabled determines if the user extension is disabled.
+
+    When the user repository contains an extension with the given identifier and
+    it is not disabled by the user, then it is always registered.  Otherwise an
+    extension is only registered when there is no registered extension in one of
+    the repositories with a higher priority. That is, if the extension is from
+    the shared repository and an active extension with the same identifier is in
+    the user repository, then the extension is not registered. Similarly a
+    bundled extension is not registered if there is an active extension with the
+    same identifier in the shared or user repository.
+*/
+void ExtensionManager::activateExtension(
+    OUString const & identifier, OUString const & fileName,
+    bool bUserDisabled,
+    bool bStartup,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    std::vector<Reference<css::deployment::XPackage> > listExtensions;
+    try {
+        listExtensions = getExtensionsWithSameId(identifier, fileName);
+    } catch (const lang::IllegalArgumentException &) {
+    }
+    OSL_ASSERT(listExtensions.size() == 3);
+
+    activateExtension(
+        ::comphelper::containerToSequence(listExtensions),
+        bUserDisabled, bStartup, xAbortChannel, xCmdEnv);
+
+    fireModified();
+}
+
+void ExtensionManager::activateExtension(
+    uno::Sequence<Reference<css::deployment::XPackage> > const & seqExt,
+    bool bUserDisabled,
+    bool bStartup,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    bool bActive = false;
+    sal_Int32 len = seqExt.getLength();
+    for (sal_Int32 i = 0; i < len; i++)
+    {
+        Reference<css::deployment::XPackage> const & aExt =  seqExt[i];
+        if (aExt.is())
+        {
+            //get the registration value of the current iteration
+            beans::Optional<beans::Ambiguous<sal_Bool> > optReg =
+                aExt->isRegistered(xAbortChannel, xCmdEnv);
+            //If nothing can be registered then break
+            if (!optReg.IsPresent)
+                break;
+
+            //Check if this is a disabled user extension,
+            if (i == 0 && bUserDisabled)
+            {
+                   aExt->revokePackage(bStartup, xAbortChannel, xCmdEnv);
+                   continue;
+            }
+
+            //If we have already determined an active extension then we must
+            //make sure to unregister all extensions with the same id in
+            //repositories with a lower priority
+            if (bActive)
+            {
+                aExt->revokePackage(bStartup, xAbortChannel, xCmdEnv);
+            }
+            else
+            {
+                //This is the first extension in the ordered list, which becomes
+                //the active extension
+                bActive = true;
+                //Register if not already done.
+                //reregister if the value is ambiguous, which indicates that
+                //something went wrong during last registration.
+                aExt->registerPackage(bStartup, xAbortChannel, xCmdEnv);
+            }
+        }
+    }
+}
+
+Reference<css::deployment::XPackage> ExtensionManager::backupExtension(
+    OUString const & identifier, OUString const & fileName,
+    Reference<css::deployment::XPackageManager> const & xPackageManager,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    Reference<css::deployment::XPackage> xBackup;
+    Reference<ucb::XCommandEnvironment> tmpCmdEnv(
+        new TmpRepositoryCommandEnv(xCmdEnv->getInteractionHandler()));
+    Reference<css::deployment::XPackage> xOldExtension = xPackageManager->getDeployedPackage(
+            identifier, fileName, tmpCmdEnv);
+
+    if (xOldExtension.is())
+    {
+        xBackup = getTmpRepository()->addPackage(
+            xOldExtension->getURL(), uno::Sequence<beans::NamedValue>(),
+            OUString(), Reference<task::XAbortChannel>(), tmpCmdEnv);
+
+        OSL_ENSURE(xBackup.is(), "Failed to backup extension");
+    }
+    return xBackup;
+}
+
+//The supported package types are actually determined by the registry. However
+//creating a registry
+//(desktop/source/deployment/registry/dp_registry.cxx:PackageRegistryImpl) will
+//create all the backends, so that the registry can obtain from them the package
+//types. Creating the registry will also set up the registry folder containing
+//all the subfolders for the respective backends.
+//Because all repositories support the same backends, we can just delegate this
+//call to one of the repositories.
+uno::Sequence< Reference<css::deployment::XPackageTypeInfo> >
+ExtensionManager::getSupportedPackageTypes()
+{
+    return getUserRepository()->getSupportedPackageTypes();
+}
+//Do some necessary checks and user interaction. This function does not
+//acquire the extension manager mutex and that mutex must not be acquired
+//when this function is called. doChecksForAddExtension does  synchronous
+//user interactions which may require acquiring the solar mutex.
+//Returns true if the extension can be installed.
+bool ExtensionManager::doChecksForAddExtension(
+    Reference<css::deployment::XPackageManager> const & xPackageMgr,
+    uno::Sequence<beans::NamedValue> const & properties,
+    css::uno::Reference<css::deployment::XPackage> const & xTmpExtension,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+    Reference<css::deployment::XPackage> & out_existingExtension )
+{
+    try
+    {
+        Reference<css::deployment::XPackage> xOldExtension;
+        const OUString sIdentifier = dp_misc::getIdentifier(xTmpExtension);
+        const OUString sFileName = xTmpExtension->getName();
+        const OUString sDisplayName = xTmpExtension->getDisplayName();
+        const OUString sVersion = xTmpExtension->getVersion();
+
+        try
+        {
+            xOldExtension = xPackageMgr->getDeployedPackage(
+                sIdentifier, sFileName, xCmdEnv);
+            out_existingExtension = xOldExtension;
+        }
+        catch (const lang::IllegalArgumentException &)
+        {
+        }
+        bool bCanInstall = false;
+
+        //This part is not guarded against other threads removing, adding, disabling ...
+        //etc. the same extension.
+        //checkInstall is safe because it notifies the user if the extension is not yet
+        //installed in the same repository. Because addExtension has its own guard
+        //(m_addMutex), another thread cannot add the extension in the meantime.
+        //checkUpdate is called if the same extension exists in the same
+        //repository. The user is asked if they want to replace it.  Another
+        //thread
+        //could already remove the extension. So asking the user was not
+        //necessary. No harm is done. The other thread may also ask the user
+        //if he wants to remove the extension. This depends on the
+        //XCommandEnvironment which it passes to removeExtension.
+        if (xOldExtension.is())
+        {
+            //throws a CommandFailedException if the user cancels
+            //the action.
+            checkUpdate(sVersion, sDisplayName,xOldExtension, xCmdEnv);
+        }
+        else
+        {
+            //throws a CommandFailedException if the user cancels
+            //the action.
+            checkInstall(sDisplayName, xCmdEnv);
+        }
+        //Prevent showing the license if requested.
+        Reference<ucb::XCommandEnvironment> _xCmdEnv(xCmdEnv);
+        ExtensionProperties props(std::u16string_view(), properties, Reference<ucb::XCommandEnvironment>(), m_xContext);
+
+        dp_misc::DescriptionInfoset info(dp_misc::getDescriptionInfoset(xTmpExtension->getURL()));
+        const ::std::optional<dp_misc::SimpleLicenseAttributes> licenseAttributes =
+            info.getSimpleLicenseAttributes();
+
+        if (licenseAttributes && licenseAttributes->suppressIfRequired
+            && props.isSuppressedLicense())
+            _xCmdEnv.set(new NoLicenseCommandEnv(xCmdEnv->getInteractionHandler()));
+
+        bCanInstall = xTmpExtension->checkPrerequisites(
+            xAbortChannel, _xCmdEnv, xOldExtension.is() || props.isExtensionUpdate()) == 0;
+
+        return bCanInstall;
+    }
+    catch ( const css::deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (const uno::Exception &) {
+        uno::Any excOccurred = ::cppu::getCaughtException();
+        css::deployment::DeploymentException exc(
+            "Extension Manager: exception in doChecksForAddExtension",
+            static_cast<OWeakObject*>(this), excOccurred);
+        throw exc;
+    } catch (...) {
+        throw uno::RuntimeException(
+            "Extension Manager: unexpected exception in doChecksForAddExtension",
+            static_cast<OWeakObject*>(this));
+    }
+}
+
+// Only add to shared and user repository
+Reference<css::deployment::XPackage> ExtensionManager::addExtension(
+    OUString const & url, uno::Sequence<beans::NamedValue> const & properties,
+    OUString const & repository,
+        Reference<task::XAbortChannel> const & xAbortChannel,
+        Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    Reference<css::deployment::XPackage> xNewExtension;
+    //Determine the repository to use
+    Reference<css::deployment::XPackageManager> xPackageManager;
+    if (repository == "user")
+        xPackageManager = getUserRepository();
+    else if (repository == "shared")
+        xPackageManager = getSharedRepository();
+    else
+        throw lang::IllegalArgumentException(
+            "No valid repository name provided.",
+            static_cast<cppu::OWeakObject*>(this), 0);
+    //We must make sure that the xTmpExtension is not create twice, because this
+    //would remove the first one.
+    ::osl::MutexGuard addGuard(m_addMutex);
+
+    Reference<css::deployment::XPackageManager> xTmpRepository(getTmpRepository());
+        // make sure xTmpRepository is alive as long as xTmpExtension is; as
+        // the "tmp" manager is only held weakly by m_xPackageManagerFactory, it
+        // could otherwise be disposed early, which would in turn dispose
+        // xTmpExtension's PackageRegistryBackend behind its back
+    Reference<css::deployment::XPackage> xTmpExtension(
+        xTmpRepository->addPackage(
+            url, uno::Sequence<beans::NamedValue>(), OUString(), xAbortChannel,
+            new TmpRepositoryCommandEnv()));
+    if (!xTmpExtension.is()) {
+        throw css::deployment::DeploymentException(
+            ("Extension Manager: Failed to create temporary XPackage for url: "
+             + url),
+            static_cast<OWeakObject*>(this), uno::Any());
+    }
+
+    //Make sure the extension is removed from the tmp repository in case
+    //of an exception
+    ExtensionRemoveGuard tmpExtensionRemoveGuard(xTmpExtension, getTmpRepository());
+    ExtensionRemoveGuard bakExtensionRemoveGuard;
+    const OUString sIdentifier = dp_misc::getIdentifier(xTmpExtension);
+    const OUString sFileName = xTmpExtension->getName();
+    Reference<css::deployment::XPackage> xOldExtension;
+    Reference<css::deployment::XPackage> xExtensionBackup;
+
+    uno::Any excOccurred2;
+    bool bCanInstall = doChecksForAddExtension(
+        xPackageManager,
+        properties,
+        xTmpExtension,
+        xAbortChannel,
+        xCmdEnv,
+        xOldExtension );
+
+    {
+        bool bUserDisabled = false;
+        // In this guarded section (getMutex) we must not use the argument xCmdEnv
+        // because it may bring up dialogs (XInteractionHandler::handle) this
+        // may potentially deadlock. See issue
+        // http://qa.openoffice.org/issues/show_bug.cgi?id=114933
+        // By not providing xCmdEnv the underlying APIs will throw an exception if
+        // the XInteractionRequest cannot be handled.
+        ::osl::MutexGuard guard(m_aMutex);
+
+        if (bCanInstall)
+        {
+            try
+            {
+                bUserDisabled = isUserDisabled(sIdentifier, sFileName);
+                if (xOldExtension.is())
+                {
+                    try
+                    {
+                        xOldExtension->revokePackage(
+                            false, xAbortChannel, Reference<ucb::XCommandEnvironment>());
+                        //save the old user extension in case the user aborts
+                        xExtensionBackup = getBakRepository()->importExtension(
+                            xOldExtension, Reference<task::XAbortChannel>(),
+                            Reference<ucb::XCommandEnvironment>());
+                        bakExtensionRemoveGuard.set(xExtensionBackup, getBakRepository());
+                    }
+                    catch (const lang::DisposedException &)
+                    {
+                        //Another thread might have removed the extension meanwhile
+                    }
+                }
+                //check again dependencies but prevent user interaction,
+                //We can disregard the license, because the user must have already
+                //accepted it, when we called checkPrerequisites the first time
+                rtl::Reference<SilentCheckPrerequisitesCommandEnv> pSilentCommandEnv =
+                    new SilentCheckPrerequisitesCommandEnv();
+
+                sal_Int32 failedPrereq = xTmpExtension->checkPrerequisites(
+                    xAbortChannel, pSilentCommandEnv, true);
+                if (failedPrereq == 0)
+                {
+                    xNewExtension = xPackageManager->addPackage(
+                        url, properties, OUString(), xAbortChannel,
+                        Reference<ucb::XCommandEnvironment>());
+                    //If we add a user extension and there is already one which was
+                    //disabled by a user, then the newly installed one is enabled. If we
+                    //add to another repository then the user extension remains
+                    //disabled.
+                    bool bUserDisabled2 = bUserDisabled;
+                    if (repository == "user")
+                        bUserDisabled2 = false;
+
+                    // pass the two values via variables to workaround gcc-4.3.4 specific bug (bnc#655912)
+                    OUString sNewExtensionIdentifier = dp_misc::getIdentifier(xNewExtension);
+                    OUString sNewExtensionFileName = xNewExtension->getName();
+
+                    activateExtension(
+                        sNewExtensionIdentifier, sNewExtensionFileName,
+                        bUserDisabled2, false, xAbortChannel,
+                        Reference<ucb::XCommandEnvironment>());
+
+                    // if reached this section,
+                    // this means that either the licensedialog.ui didn't popup,
+                    // or user accepted the license agreement. otherwise
+                    // no need to call fireModified() because user declined
+                    // the license agreement therefore no change made.
+                    try
+                    {
+                        fireModified();
+
+                    }catch ( const css::deployment::DeploymentException& ) {
+                        throw;
+                    } catch ( const ucb::CommandFailedException & ) {
+                        throw;
+                    } catch ( const ucb::CommandAbortedException & ) {
+                        throw;
+                    } catch (const lang::IllegalArgumentException &) {
+                        throw;
+                    } catch (const uno::RuntimeException &) {
+                        throw;
+                    } catch (const uno::Exception &) {
+                        uno::Any excOccurred = ::cppu::getCaughtException();
+                        css::deployment::DeploymentException exc(
+                            "Extension Manager: Exception on fireModified() "
+                            "in the scope of 'if (failedPrereq == 0)'",
+                            static_cast<OWeakObject*>(this), excOccurred);
+                        throw exc;
+                    } catch (...) {
+                        throw uno::RuntimeException(
+                            "Extension Manager: RuntimeException on fireModified() "
+                            "in the scope of 'if (failedPrereq == 0)'",
+                            static_cast<OWeakObject*>(this));
+                    }
+                }
+                else
+                {
+                    if (pSilentCommandEnv->m_Exception.hasValue())
+                        ::cppu::throwException(pSilentCommandEnv->m_Exception);
+                    else if ( pSilentCommandEnv->m_UnknownException.hasValue())
+                        ::cppu::throwException(pSilentCommandEnv->m_UnknownException);
+                    else
+                        throw css::deployment::DeploymentException (
+                            "Extension Manager: exception during addExtension, ckeckPrerequisites failed",
+                            static_cast<OWeakObject*>(this), uno::Any());
+                }
+            }
+            catch ( const css::deployment::DeploymentException& ) {
+                excOccurred2 = ::cppu::getCaughtException();
+            } catch ( const ucb::CommandFailedException & ) {
+                excOccurred2 = ::cppu::getCaughtException();
+            } catch ( const ucb::CommandAbortedException & ) {
+                excOccurred2 = ::cppu::getCaughtException();
+            } catch (const lang::IllegalArgumentException &) {
+                excOccurred2 = ::cppu::getCaughtException();
+            } catch (const uno::RuntimeException &) {
+                excOccurred2 = ::cppu::getCaughtException();
+            } catch (...) {
+                excOccurred2 = ::cppu::getCaughtException();
+                css::deployment::DeploymentException exc(
+                    "Extension Manager: exception during addExtension, url: "
+                    + url, static_cast<OWeakObject*>(this), excOccurred2);
+                excOccurred2 <<= exc;
+            }
+        }
+
+        if (excOccurred2.hasValue())
+        {
+            //It does not matter what exception is thrown. We try to
+            //recover the original status.
+            //If the user aborted installation then a ucb::CommandAbortedException
+            //is thrown.
+            //Use a private AbortChannel so the user cannot interrupt.
+            try
+            {
+                if (xExtensionBackup.is())
+                {
+                    xPackageManager->importExtension(
+                            xExtensionBackup, Reference<task::XAbortChannel>(),
+                            Reference<ucb::XCommandEnvironment>());
+                }
+                activateExtension(
+                    sIdentifier, sFileName, bUserDisabled, false,
+                    Reference<task::XAbortChannel>(), Reference<ucb::XCommandEnvironment>());
+            }
+            catch (...)
+            {
+            }
+            ::cppu::throwException(excOccurred2);
+        }
+    } // leaving the guarded section (getMutex())
+
+    return xNewExtension;
+}
+
+void ExtensionManager::removeExtension(
+    OUString const & identifier, OUString const & fileName,
+    OUString const & repository,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    uno::Any excOccurred1;
+    Reference<css::deployment::XPackage> xExtensionBackup;
+    Reference<css::deployment::XPackageManager> xPackageManager;
+    bool bUserDisabled = false;
+    ::osl::MutexGuard guard(m_aMutex);
+    try
+    {
+//Determine the repository to use
+        if (repository == "user")
+            xPackageManager = getUserRepository();
+        else if (repository == "shared")
+            xPackageManager = getSharedRepository();
+        else
+            throw lang::IllegalArgumentException(
+                "No valid repository name provided.",
+                static_cast<cppu::OWeakObject*>(this), 0);
+
+        bUserDisabled = isUserDisabled(identifier, fileName);
+        //Backup the extension, in case the user cancels the action
+        xExtensionBackup = backupExtension(
+            identifier, fileName, xPackageManager, xCmdEnv);
+
+        //revoke the extension if it is active
+        Reference<css::deployment::XPackage> xOldExtension =
+            xPackageManager->getDeployedPackage(
+                identifier, fileName, xCmdEnv);
+        xOldExtension->revokePackage(false, xAbortChannel, xCmdEnv);
+
+        xPackageManager->removePackage(
+            identifier, fileName, xAbortChannel, xCmdEnv);
+        activateExtension(identifier, fileName, bUserDisabled, false,
+                          xAbortChannel, xCmdEnv);
+        fireModified();
+    }
+    catch ( const css::deployment::DeploymentException& ) {
+        excOccurred1 = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandFailedException & ) {
+        excOccurred1 = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandAbortedException & ) {
+        excOccurred1 = ::cppu::getCaughtException();
+    } catch (const lang::IllegalArgumentException &) {
+        excOccurred1 = ::cppu::getCaughtException();
+    } catch (const uno::RuntimeException &) {
+        excOccurred1 = ::cppu::getCaughtException();
+    } catch (...) {
+        excOccurred1 = ::cppu::getCaughtException();
+        css::deployment::DeploymentException exc(
+            "Extension Manager: exception during removeExtension",
+            static_cast<OWeakObject*>(this), excOccurred1);
+        excOccurred1 <<= exc;
+    }
+
+    if (excOccurred1.hasValue())
+    {
+        //User aborted installation, restore the previous situation.
+        //Use a private AbortChannel so the user cannot interrupt.
+        try
+        {
+            Reference<ucb::XCommandEnvironment> tmpCmdEnv(
+                new TmpRepositoryCommandEnv(xCmdEnv->getInteractionHandler()));
+            if (xExtensionBackup.is())
+            {
+                xPackageManager->importExtension(
+                        xExtensionBackup, Reference<task::XAbortChannel>(),
+                        tmpCmdEnv);
+                activateExtension(
+                    identifier, fileName, bUserDisabled, false,
+                    Reference<task::XAbortChannel>(),
+                    tmpCmdEnv);
+
+                getTmpRepository()->removePackage(
+                    dp_misc::getIdentifier(xExtensionBackup),
+                    xExtensionBackup->getName(), xAbortChannel, xCmdEnv);
+                fireModified();
+            }
+        }
+        catch (...)
+        {
+        }
+        ::cppu::throwException(excOccurred1);
+    }
+
+    if (xExtensionBackup.is())
+        getTmpRepository()->removePackage(
+            dp_misc::getIdentifier(xExtensionBackup),
+            xExtensionBackup->getName(), xAbortChannel, xCmdEnv);
+}
+
+// Only enable extensions from shared and user repository
+void ExtensionManager::enableExtension(
+    Reference<css::deployment::XPackage> const & extension,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    ::osl::MutexGuard guard(m_aMutex);
+    bool bUserDisabled = false;
+    uno::Any excOccurred;
+    try
+    {
+        if (!extension.is())
+            return;
+        OUString repository = extension->getRepositoryName();
+        if (repository != "user")
+            throw lang::IllegalArgumentException(
+                "No valid repository name provided.",
+                static_cast<cppu::OWeakObject*>(this), 0);
+
+        bUserDisabled = isUserDisabled(dp_misc::getIdentifier(extension),
+                                       extension->getName());
+
+        activateExtension(dp_misc::getIdentifier(extension),
+                          extension->getName(), false, false,
+                          xAbortChannel, xCmdEnv);
+    }
+    catch ( const css::deployment::DeploymentException& ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandFailedException & ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandAbortedException & ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (const lang::IllegalArgumentException &) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (const uno::RuntimeException &) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (...) {
+        excOccurred = ::cppu::getCaughtException();
+        css::deployment::DeploymentException exc(
+            "Extension Manager: exception during enableExtension",
+            static_cast<OWeakObject*>(this), excOccurred);
+        excOccurred <<= exc;
+    }
+
+    if (!excOccurred.hasValue())
+        return;
+
+    try
+    {
+        activateExtension(dp_misc::getIdentifier(extension),
+                          extension->getName(), bUserDisabled, false,
+                          xAbortChannel, xCmdEnv);
+    }
+    catch (...)
+    {
+    }
+    ::cppu::throwException(excOccurred);
+}
+
+sal_Int32 ExtensionManager::checkPrerequisitesAndEnable(
+    Reference<css::deployment::XPackage> const & extension,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    try
+    {
+        if (!extension.is())
+            return 0;
+        ::osl::MutexGuard guard(m_aMutex);
+        sal_Int32 ret = 0;
+        Reference<css::deployment::XPackageManager> mgr =
+            getPackageManager(extension->getRepositoryName());
+        ret = mgr->checkPrerequisites(extension, xAbortChannel, xCmdEnv);
+        if (ret)
+        {
+            //There are some unfulfilled prerequisites, try to revoke
+            extension->revokePackage(false, xAbortChannel, xCmdEnv);
+        }
+        const OUString id(dp_misc::getIdentifier(extension));
+        activateExtension(id, extension->getName(),
+                          isUserDisabled(id, extension->getName()), false,
+                          xAbortChannel, xCmdEnv);
+        return ret;
+    }
+    catch ( const css::deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (...) {
+        uno::Any excOccurred = ::cppu::getCaughtException();
+        css::deployment::DeploymentException exc(
+            "Extension Manager: exception during disableExtension",
+            static_cast<OWeakObject*>(this), excOccurred);
+        throw exc;
+    }
+}
+
+void ExtensionManager::disableExtension(
+    Reference<css::deployment::XPackage> const & extension,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    ::osl::MutexGuard guard(m_aMutex);
+    uno::Any excOccurred;
+    bool bUserDisabled = false;
+    try
+    {
+        if (!extension.is())
+            return;
+        const OUString repository( extension->getRepositoryName());
+        if (repository != "user")
+            throw lang::IllegalArgumentException(
+                "No valid repository name provided.",
+                static_cast<cppu::OWeakObject*>(this), 0);
+
+        const OUString id(dp_misc::getIdentifier(extension));
+        bUserDisabled = isUserDisabled(id, extension->getName());
+
+        activateExtension(id, extension->getName(), true, false,
+                          xAbortChannel, xCmdEnv);
+    }
+    catch ( const css::deployment::DeploymentException& ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandFailedException & ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandAbortedException & ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (const lang::IllegalArgumentException &) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (const uno::RuntimeException &) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (...) {
+        excOccurred = ::cppu::getCaughtException();
+        css::deployment::DeploymentException exc(
+            "Extension Manager: exception during disableExtension",
+            static_cast<OWeakObject*>(this), excOccurred);
+        excOccurred <<= exc;
+    }
+
+    if (!excOccurred.hasValue())
+        return;
+
+    try
+    {
+        activateExtension(dp_misc::getIdentifier(extension),
+                          extension->getName(), bUserDisabled, false,
+                          xAbortChannel, xCmdEnv);
+    }
+    catch (...)
+    {
+    }
+    ::cppu::throwException(excOccurred);
+}
+
+uno::Sequence< Reference<css::deployment::XPackage> >
+    ExtensionManager::getDeployedExtensions(
+    OUString const & repository,
+    Reference<task::XAbortChannel> const &xAbort,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    return getPackageManager(repository)->getDeployedPackages(
+        xAbort, xCmdEnv);
+}
+
+Reference<css::deployment::XPackage>
+    ExtensionManager::getDeployedExtension(
+    OUString const & repository,
+    OUString const & identifier,
+    OUString const & filename,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    return getPackageManager(repository)->getDeployedPackage(
+        identifier, filename, xCmdEnv);
+}
+
+uno::Sequence< uno::Sequence<Reference<css::deployment::XPackage> > >
+    ExtensionManager::getAllExtensions(
+    Reference<task::XAbortChannel> const & xAbort,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    try
+    {
+        id2extensions mapExt;
+
+        uno::Sequence<Reference<css::deployment::XPackage> > userExt =
+            getUserRepository()->getDeployedPackages(xAbort, xCmdEnv);
+        addExtensionsToMap(mapExt, userExt, u"user");
+        uno::Sequence<Reference<css::deployment::XPackage> > sharedExt =
+            getSharedRepository()->getDeployedPackages(xAbort, xCmdEnv);
+        addExtensionsToMap(mapExt, sharedExt, u"shared");
+        uno::Sequence<Reference<css::deployment::XPackage> > bundledExt =
+            getBundledRepository()->getDeployedPackages(xAbort, xCmdEnv);
+        addExtensionsToMap(mapExt, bundledExt, u"bundled");
+
+        // Create the tmp repository to trigger its clean up (deletion
+        // of old temporary data.)
+        getTmpRepository();
+
+        //copy the values of the map to a vector for sorting
+        std::vector< std::vector<Reference<css::deployment::XPackage> > >
+              vecExtensions;
+        for (auto const& elem : mapExt)
+            vecExtensions.push_back(elem.second);
+
+        //sort the element according to the identifier
+        std::sort(vecExtensions.begin(), vecExtensions.end(), CompIdentifiers());
+
+        sal_Int32 j = 0;
+        uno::Sequence< uno::Sequence<Reference<css::deployment::XPackage> > > seqSeq(vecExtensions.size());
+        auto seqSeqRange = asNonConstRange(seqSeq);
+        for (auto const& elem : vecExtensions)
+        {
+            seqSeqRange[j++] = comphelper::containerToSequence(elem);
+        }
+        return seqSeq;
+
+    } catch ( const css::deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (...) {
+        uno::Any exc = ::cppu::getCaughtException();
+        throw css::deployment::DeploymentException(
+            "Extension Manager: exception during enableExtension",
+            static_cast<OWeakObject*>(this), exc);
+   }
+}
+
+// Only to be called from unopkg or soffice bootstrap (with force=true in the
+// latter case):
+void ExtensionManager::reinstallDeployedExtensions(
+    sal_Bool force, OUString const & repository,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    try
+    {
+        Reference<css::deployment::XPackageManager>
+            xPackageManager = getPackageManager(repository);
+
+        std::set< OUString > disabledExts;
+        {
+            const uno::Sequence< Reference<css::deployment::XPackage> > extensions(
+                xPackageManager->getDeployedPackages(xAbortChannel, xCmdEnv));
+            for ( const Reference<css::deployment::XPackage>& package : extensions )
+            {
+                try
+                {
+                    beans::Optional< beans::Ambiguous< sal_Bool > > registered(
+                        package->isRegistered(xAbortChannel, xCmdEnv));
+                    if (registered.IsPresent &&
+                        !(registered.Value.IsAmbiguous ||
+                          registered.Value.Value))
+                    {
+                        const OUString id = dp_misc::getIdentifier(package);
+                        OSL_ASSERT(!id.isEmpty());
+                        disabledExts.insert(id);
+                    }
+                }
+                catch (const lang::DisposedException &)
+                {
+                }
+            }
+        }
+
+        ::osl::MutexGuard guard(m_aMutex);
+        xPackageManager->reinstallDeployedPackages(
+            force, xAbortChannel, xCmdEnv);
+        //We must sync here, otherwise we will get exceptions when extensions
+        //are removed.
+        dp_misc::syncRepositories(force, xCmdEnv);
+        const uno::Sequence< Reference<css::deployment::XPackage> > extensions(
+            xPackageManager->getDeployedPackages(xAbortChannel, xCmdEnv));
+
+        for ( const Reference<css::deployment::XPackage>& package : extensions )
+        {
+            try
+            {
+                const OUString id =  dp_misc::getIdentifier(package);
+                const OUString fileName = package->getName();
+                OSL_ASSERT(!id.isEmpty());
+                activateExtension(
+                    id, fileName, disabledExts.find(id) != disabledExts.end(),
+                    true, xAbortChannel, xCmdEnv );
+            }
+            catch (const lang::DisposedException &)
+            {
+            }
+        }
+    } catch ( const css::deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (...) {
+        uno::Any exc = ::cppu::getCaughtException();
+        throw css::deployment::DeploymentException(
+            "Extension Manager: exception during enableExtension",
+            static_cast<OWeakObject*>(this), exc);
+    }
+}
+
+sal_Bool ExtensionManager::synchronize(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    try
+    {
+        ::osl::MutexGuard guard(m_aMutex);
+        OUString sSynchronizingShared(StrSyncRepository());
+        sSynchronizingShared = sSynchronizingShared.replaceAll("%NAME", "shared");
+        dp_misc::ProgressLevel progressShared(xCmdEnv, sSynchronizingShared);
+        bool bModified = getSharedRepository()->synchronize(xAbortChannel, xCmdEnv);
+        progressShared.update("\n\n");
+
+        OUString sSynchronizingBundled(StrSyncRepository());
+        sSynchronizingBundled = sSynchronizingBundled.replaceAll("%NAME", "bundled");
+        dp_misc::ProgressLevel progressBundled(xCmdEnv, sSynchronizingBundled);
+        bModified |= static_cast<bool>(getBundledRepository()->synchronize(xAbortChannel, xCmdEnv));
+        progressBundled.update("\n\n");
+
+        //Always determine the active extension.
+        //TODO: Is this still necessary?  (It used to be necessary for the
+        // first-start optimization:  The setup created the registration data
+        // for the bundled extensions (share/prereg/bundled) which was copied to
+        // the user installation when a user started OOo for the first time
+        // after running setup.  All bundled extensions were registered at that
+        // moment.  However, extensions with the same identifier could be in the
+        // shared or user repository, in which case the respective bundled
+        // extensions had to be revoked.)
+        try
+        {
+            const uno::Sequence<uno::Sequence<Reference<css::deployment::XPackage> > >
+                seqSeqExt = getAllExtensions(xAbortChannel, xCmdEnv);
+            for (uno::Sequence<Reference<css::deployment::XPackage> > const & seqExt : seqSeqExt)
+            {
+                activateExtension(seqExt, isUserDisabled(seqExt), true,
+                                  xAbortChannel, xCmdEnv);
+            }
+        }
+        catch (...)
+        {
+            //We catch the exception, so we can write the lastmodified file
+            //so we will no repeat this every time OOo starts.
+            OSL_FAIL("Extensions Manager: synchronize");
+        }
+        OUString lastSyncBundled("$BUNDLED_EXTENSIONS_USER/lastsynchronized");
+        writeLastModified(lastSyncBundled, xCmdEnv, m_xContext);
+        OUString lastSyncShared("$SHARED_EXTENSIONS_USER/lastsynchronized");
+        writeLastModified(lastSyncShared, xCmdEnv, m_xContext);
+        return bModified;
+    } catch ( const css::deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (...) {
+        uno::Any exc = ::cppu::getCaughtException();
+        throw css::deployment::DeploymentException(
+            "Extension Manager: exception in synchronize",
+            static_cast<OWeakObject*>(this), exc);
+    }
+}
+
+// Notify the user when a new extension is to be installed. This is only the
+// case when one uses the system integration to install an extension (double
+// clicking on .oxt file etc.)). The function must only be called if there is no
+// extension with the same identifier already deployed. Then the checkUpdate
+// function will inform the user that the extension is about to be installed In
+// case the user cancels the installation a CommandFailed exception is
+// thrown.
+void ExtensionManager::checkInstall(
+    OUString const & displayName,
+    Reference<ucb::XCommandEnvironment> const & cmdEnv)
+{
+        uno::Any request(
+            css::deployment::InstallException(
+                "Extension " + displayName +
+                " is about to be installed.",
+                static_cast<OWeakObject *>(this), displayName));
+        bool approve = false, abort = false;
+        if (! dp_misc::interactContinuation(
+                request, cppu::UnoType<task::XInteractionApprove>::get(),
+                cmdEnv, &approve, &abort ))
+        {
+            OSL_ASSERT( !approve && !abort );
+            throw css::deployment::DeploymentException(
+                DpResId(RID_STR_ERROR_WHILE_ADDING) + displayName,
+                static_cast<OWeakObject *>(this), request );
+        }
+        if (abort || !approve)
+            throw ucb::CommandFailedException(
+                DpResId(RID_STR_ERROR_WHILE_ADDING) + displayName,
+                static_cast<OWeakObject *>(this), request );
+}
+
+/* The function will make the user interaction in case there is an extension
+installed with the same id. This function may only be called if there is already
+an extension.
+*/
+void ExtensionManager::checkUpdate(
+    OUString const & newVersion,
+    OUString const & newDisplayName,
+    Reference<css::deployment::XPackage> const & oldExtension,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    // package already deployed, interact --force:
+    uno::Any request(
+        (css::deployment::VersionException(
+            DpResId(
+                RID_STR_PACKAGE_ALREADY_ADDED ) + newDisplayName,
+            static_cast<OWeakObject *>(this), newVersion, newDisplayName,
+            oldExtension ) ) );
+    bool replace = false, abort = false;
+    if (! dp_misc::interactContinuation(
+            request, cppu::UnoType<task::XInteractionApprove>::get(),
+            xCmdEnv, &replace, &abort )) {
+        OSL_ASSERT( !replace && !abort );
+        throw css::deployment::DeploymentException(
+            DpResId(
+                RID_STR_ERROR_WHILE_ADDING) + newDisplayName,
+            static_cast<OWeakObject *>(this), request );
+    }
+    if (abort || !replace)
+        throw ucb::CommandFailedException(
+            DpResId(
+                RID_STR_PACKAGE_ALREADY_ADDED) + newDisplayName,
+            static_cast<OWeakObject *>(this), request );
+}
+
+uno::Sequence<Reference<css::deployment::XPackage> > SAL_CALL
+ExtensionManager::getExtensionsWithUnacceptedLicenses(
+        OUString const & repository,
+        Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    Reference<css::deployment::XPackageManager>
+        xPackageManager = getPackageManager(repository);
+    ::osl::MutexGuard guard(m_aMutex);
+    return xPackageManager->getExtensionsWithUnacceptedLicenses(xCmdEnv);
+}
+
+sal_Bool ExtensionManager::isReadOnlyRepository(OUString const & repository)
+{
+    return getPackageManager(repository)->isReadOnly();
+}
+
+
+// XModifyBroadcaster
+
+void ExtensionManager::addModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+     check();
+     rBHelper.addListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+
+void ExtensionManager::removeModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+    check();
+    rBHelper.removeListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+void ExtensionManager::check()
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed) {
+        throw lang::DisposedException(
+            "ExtensionManager instance has already been disposed!",
+            static_cast<OWeakObject *>(this) );
+    }
+}
+
+void ExtensionManager::fireModified()
+{
+    ::cppu::OInterfaceContainerHelper * pContainer = rBHelper.getContainer(
+        cppu::UnoType<util::XModifyListener>::get() );
+    if (pContainer != nullptr) {
+        pContainer->forEach<util::XModifyListener>(
+            [this] (uno::Reference<util::XModifyListener> const& xListener)
+                { return xListener->modified(lang::EventObject(static_cast<OWeakObject *>(this))); });
+    }
+}
+
+} // namespace dp_manager
+
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_ExtensionManager_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& )
+{
+    return cppu::acquire(new dp_manager::ExtensionManager(context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_extensionmanager.hxx b/desktop/source/deployment/manager/dp_extensionmanager.hxx
new file mode 100644
index 000000000..0e08314c3
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_extensionmanager.hxx
@@ -0,0 +1,227 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <strings.hrc>
+#include <dp_shared.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <com/sun/star/deployment/XExtensionManager.hpp>
+#include <com/sun/star/deployment/XPackageManager.hpp>
+#include <com/sun/star/deployment/XPackageManagerFactory.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <osl/mutex.hxx>
+#include <vector>
+#include <unordered_map>
+
+namespace dp_manager {
+
+typedef std::unordered_map<
+    OUString,
+    std::vector<css::uno::Reference<css::deployment::XPackage> > > id2extensions;
+
+class ExtensionManager : private cppu::BaseMutex,
+        public ::cppu::WeakComponentImplHelper< css::deployment::XExtensionManager, css::lang::XServiceInfo >
+{
+public:
+    explicit ExtensionManager( css::uno::Reference< css::uno::XComponentContext >const& xContext);
+    virtual     ~ExtensionManager() override;
+
+    void check();
+    void fireModified();
+
+public:
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+//    XModifyBroadcaster
+    virtual void SAL_CALL addModifyListener(
+       css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+    virtual void SAL_CALL removeModifyListener(
+       css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+
+//XExtensionManager
+    virtual css::uno::Sequence<
+        css::uno::Reference<css::deployment::XPackageTypeInfo> > SAL_CALL
+        getSupportedPackageTypes() override;
+
+    virtual css::uno::Reference<css::task::XAbortChannel> SAL_CALL
+    createAbortChannel() override;
+
+    virtual css::uno::Reference<css::deployment::XPackage> SAL_CALL addExtension(
+        OUString const & url,
+        css::uno::Sequence<css::beans::NamedValue> const & properties,
+        OUString const & repository,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL removeExtension(
+        OUString const & identifier,
+        OUString const & filename,
+        OUString const & repository,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL enableExtension(
+        css::uno::Reference<css::deployment::XPackage> const & extension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL disableExtension(
+        css::uno::Reference<css::deployment::XPackage> const & extension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual sal_Int32 SAL_CALL checkPrerequisitesAndEnable(
+        css::uno::Reference<css::deployment::XPackage> const & extension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Sequence< css::uno::Reference<css::deployment::XPackage> >
+        SAL_CALL getDeployedExtensions(
+        OUString const & repository,
+        css::uno::Reference<css::task::XAbortChannel> const &,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Reference< css::deployment::XPackage>
+        SAL_CALL getDeployedExtension(
+        OUString const & repository,
+        OUString const & identifier,
+        OUString const & filename,
+        css::uno::Reference< css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> >
+    SAL_CALL getExtensionsWithSameIdentifier(
+        OUString const & identifier,
+        OUString const & filename,
+        css::uno::Reference< css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Sequence< css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > >
+        SAL_CALL getAllExtensions(
+        css::uno::Reference<css::task::XAbortChannel> const &,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL reinstallDeployedExtensions(
+        sal_Bool force, OUString const & repository,
+        css::uno::Reference< css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference< css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual sal_Bool SAL_CALL synchronize(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > SAL_CALL
+    getExtensionsWithUnacceptedLicenses(
+        OUString const & repository,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv) override;
+
+    virtual sal_Bool SAL_CALL isReadOnlyRepository(OUString const & repository) override;
+
+private:
+
+    static OUString StrSyncRepository() { return DpResId(RID_STR_SYNCHRONIZING_REPOSITORY); }
+
+    css::uno::Reference< css::uno::XComponentContext> m_xContext;
+    css::uno::Reference<css::deployment::XPackageManagerFactory> m_xPackageManagerFactory;
+
+    //only to be used within addExtension
+    ::osl::Mutex m_addMutex;
+    /* contains the names of all repositories (except tmp) in order of there
+       priority. That is, the first element is "user" followed by "shared" and
+       then "bundled"
+     */
+    std::vector< OUString > m_repositoryNames;
+
+    css::uno::Reference<css::deployment::XPackageManager> getUserRepository();
+    css::uno::Reference<css::deployment::XPackageManager> getSharedRepository();
+    css::uno::Reference<css::deployment::XPackageManager> getBundledRepository();
+    css::uno::Reference<css::deployment::XPackageManager> getTmpRepository();
+    css::uno::Reference<css::deployment::XPackageManager> getBakRepository();
+
+    bool isUserDisabled(OUString const & identifier,
+                        OUString const & filename);
+
+    static bool isUserDisabled(
+        css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > const & seqExtSameId);
+
+    void activateExtension(
+        OUString const & identifier,
+        OUString const & fileName,
+        bool bUserDisabled, bool bStartup,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+
+    static void activateExtension(
+        css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > const & seqExt,
+        bool bUserDisabled, bool bStartup,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv );
+
+    std::vector<css::uno::Reference<css::deployment::XPackage> >
+    getExtensionsWithSameId(OUString  const & identifier,
+                            OUString const & fileName);
+
+    css::uno::Reference<css::deployment::XPackage> backupExtension(
+        OUString const & identifier, OUString const & fileName,
+        css::uno::Reference<css::deployment::XPackageManager> const & xPackageManager,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+
+    void checkInstall(
+        OUString const & displayName,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & cmdEnv);
+
+    void checkUpdate(
+        OUString const & newVersion,
+        OUString const & newDisplayName,
+        css::uno::Reference<css::deployment::XPackage> const & oldExtension,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+
+    void addExtensionsToMap(
+        id2extensions & mapExt,
+        css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > const & seqExt,
+        std::u16string_view repository);
+
+    /// @throws css::lang::IllegalArgumentException
+    /// @throws css::uno::RuntimeException
+    css::uno::Reference<css::deployment::XPackageManager>
+    getPackageManager(std::u16string_view repository);
+
+    /// @throws css::deployment::DeploymentException
+    /// @throws css::ucb::CommandFailedException
+    /// @throws css::ucb::CommandAbortedException
+    /// @throws css::lang::IllegalArgumentException
+    /// @throws css::uno::RuntimeException
+    bool doChecksForAddExtension(
+        css::uno::Reference<css::deployment::XPackageManager> const & xPackageMgr,
+        css::uno::Sequence<css::beans::NamedValue> const & properties,
+        css::uno::Reference<css::deployment::XPackage> const & xTmpExtension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+        css::uno::Reference<css::deployment::XPackage> & out_existingExtension );
+
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_informationprovider.cxx b/desktop/source/deployment/manager/dp_informationprovider.cxx
new file mode 100644
index 000000000..1e7beea34
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_informationprovider.cxx
@@ -0,0 +1,338 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <com/sun/star/deployment/UpdateInformationProvider.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/deployment/XPackageInformationProvider.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/deployment/XUpdateInformationProvider.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/task/XAbortChannel.hpp>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/xml/dom/XElement.hpp>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <osl/diagnose.h>
+#include <rtl/ustring.hxx>
+#include <tools/diagnose_ex.h>
+#include <ucbhelper/content.hxx>
+
+#include <dp_dependencies.hxx>
+#include <dp_descriptioninfoset.hxx>
+#include <dp_identifier.hxx>
+#include <dp_version.hxx>
+#include <dp_update.hxx>
+
+namespace beans      = com::sun::star::beans ;
+namespace deployment = com::sun::star::deployment ;
+namespace lang       = com::sun::star::lang ;
+namespace task       = com::sun::star::task ;
+namespace css_ucb    = com::sun::star::ucb ;
+namespace uno        = com::sun::star::uno ;
+namespace xml = com::sun::star::xml ;
+
+
+namespace dp_info {
+
+namespace {
+
+class PackageInformationProvider :
+        public ::cppu::WeakImplHelper< deployment::XPackageInformationProvider, lang::XServiceInfo >
+
+{
+    public:
+    explicit PackageInformationProvider( uno::Reference< uno::XComponentContext >const& xContext);
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageInformationProvider
+    virtual OUString SAL_CALL getPackageLocation( const OUString& extensionId ) override;
+    virtual uno::Sequence< uno::Sequence< OUString > > SAL_CALL isUpdateAvailable( const OUString& extensionId ) override;
+    virtual uno::Sequence< uno::Sequence< OUString > > SAL_CALL getExtensionList() override;
+
+private:
+
+    uno::Reference< uno::XComponentContext> mxContext;
+
+    OUString getPackageLocation( const OUString& repository,
+                                      std::u16string_view _sExtensionId );
+
+    uno::Reference< deployment::XUpdateInformationProvider > mxUpdateInformation;
+};
+
+}
+
+PackageInformationProvider::PackageInformationProvider( uno::Reference< uno::XComponentContext > const& xContext) :
+    mxContext( xContext ),
+    mxUpdateInformation( deployment::UpdateInformationProvider::create( xContext ) )
+{
+}
+
+// XServiceInfo
+OUString PackageInformationProvider::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.PackageInformationProvider";
+}
+
+sal_Bool PackageInformationProvider::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > PackageInformationProvider::getSupportedServiceNames()
+{
+    // a private one:
+    return { "com.sun.star.comp.deployment.PackageInformationProvider" };
+}
+
+OUString PackageInformationProvider::getPackageLocation(
+    const OUString & repository,
+    std::u16string_view _rExtensionId )
+{
+    OUString aLocationURL;
+    uno::Reference<deployment::XExtensionManager> xManager =
+        deployment::ExtensionManager::get(mxContext);
+
+    if ( xManager.is() )
+    {
+        const uno::Sequence< uno::Reference< deployment::XPackage > > packages(
+                xManager->getDeployedExtensions(
+                    repository,
+                    uno::Reference< task::XAbortChannel >(),
+                    uno::Reference< css_ucb::XCommandEnvironment > () ) );
+
+        for ( int pos = packages.getLength(); pos--; )
+        {
+            try
+            {
+                const beans::Optional< OUString > aID = packages[ pos ]->getIdentifier();
+                if ( aID.IsPresent && (aID.Value == _rExtensionId ) )
+                {
+                    aLocationURL = packages[ pos ]->getURL();
+                    break;
+                }
+            }
+            catch ( uno::RuntimeException & ) {}
+        }
+    }
+
+    return aLocationURL;
+}
+
+
+OUString SAL_CALL
+PackageInformationProvider::getPackageLocation( const OUString& _sExtensionId )
+{
+    OUString aLocationURL = getPackageLocation( "user", _sExtensionId );
+
+    if ( aLocationURL.isEmpty() )
+    {
+        aLocationURL = getPackageLocation( "shared", _sExtensionId );
+    }
+    if ( aLocationURL.isEmpty() )
+    {
+        aLocationURL = getPackageLocation( "bundled", _sExtensionId );
+    }
+    if ( !aLocationURL.isEmpty() )
+    {
+        try
+        {
+            ::ucbhelper::Content aContent( aLocationURL, nullptr, mxContext );
+            aLocationURL = aContent.getURL();
+        }
+        catch (const css::ucb::ContentCreationException&)
+        {
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "ignoring");
+        }
+    }
+    return aLocationURL;
+}
+
+uno::Sequence< uno::Sequence< OUString > > SAL_CALL
+PackageInformationProvider::isUpdateAvailable( const OUString& _sExtensionId )
+{
+    uno::Sequence< uno::Sequence< OUString > > aList;
+
+    uno::Reference<deployment::XExtensionManager> extMgr =
+        deployment::ExtensionManager::get(mxContext);
+
+    if (!extMgr.is())
+    {
+        OSL_ASSERT(false);
+        return aList;
+    }
+    std::vector<std::pair<uno::Reference<deployment::XPackage>, uno::Any > > errors;
+    dp_misc::UpdateInfoMap updateInfoMap;
+    if (!_sExtensionId.isEmpty())
+    {
+        std::vector<uno::Reference<deployment::XPackage> > vecExtensions;
+        uno::Reference<deployment::XPackage> extension;
+        try
+        {
+            extension = dp_misc::getExtensionWithHighestVersion(
+                extMgr->getExtensionsWithSameIdentifier(
+                    _sExtensionId, _sExtensionId, uno::Reference<css_ucb::XCommandEnvironment>()));
+            vecExtensions.push_back(extension);
+        }
+        catch (lang::IllegalArgumentException &)
+        {
+            OSL_ASSERT(false);
+        }
+        updateInfoMap = dp_misc::getOnlineUpdateInfos(
+            mxContext, extMgr, mxUpdateInformation, &vecExtensions, errors);
+    }
+    else
+    {
+        updateInfoMap = dp_misc::getOnlineUpdateInfos(
+            mxContext, extMgr, mxUpdateInformation, nullptr, errors);
+    }
+
+    int nCount = 0;
+    for (auto const& updateInfo : updateInfoMap)
+    {
+        dp_misc::UpdateInfo const & info = updateInfo.second;
+
+        OUString sOnlineVersion;
+        if (info.info.is())
+        {
+            // check, if there are unsatisfied dependencies and ignore this online update
+            dp_misc::DescriptionInfoset infoset(mxContext, info.info);
+            uno::Sequence< uno::Reference< xml::dom::XElement > >
+                ds( dp_misc::Dependencies::check( infoset ) );
+            if ( ! ds.hasElements() )
+                sOnlineVersion = info.version;
+        }
+
+        OUString sVersionUser;
+        OUString sVersionShared;
+        OUString sVersionBundled;
+        uno::Sequence< uno::Reference< deployment::XPackage> > extensions;
+        try {
+            extensions = extMgr->getExtensionsWithSameIdentifier(
+                dp_misc::getIdentifier(info.extension), info.extension->getName(),
+                uno::Reference<css_ucb::XCommandEnvironment>());
+        } catch (const lang::IllegalArgumentException&) {
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "ignoring");
+            continue;
+        }
+        OSL_ASSERT(extensions.getLength() == 3);
+        if (extensions[0].is() )
+            sVersionUser = extensions[0]->getVersion();
+        if (extensions[1].is() )
+            sVersionShared = extensions[1]->getVersion();
+        if (extensions[2].is() )
+            sVersionBundled = extensions[2]->getVersion();
+
+        bool bSharedReadOnly = extMgr->isReadOnlyRepository("shared");
+
+        dp_misc::UPDATE_SOURCE sourceUser = dp_misc::isUpdateUserExtension(
+            bSharedReadOnly, sVersionUser, sVersionShared, sVersionBundled, sOnlineVersion);
+        dp_misc::UPDATE_SOURCE sourceShared = dp_misc::isUpdateSharedExtension(
+            bSharedReadOnly, sVersionShared, sVersionBundled, sOnlineVersion);
+
+        OUString updateVersionUser;
+        OUString updateVersionShared;
+        if (sourceUser != dp_misc::UPDATE_SOURCE_NONE)
+            updateVersionUser = dp_misc::getHighestVersion(
+                sVersionShared, sVersionBundled, sOnlineVersion);
+        if (sourceShared  != dp_misc::UPDATE_SOURCE_NONE)
+            updateVersionShared = dp_misc::getHighestVersion(
+                OUString(), sVersionBundled, sOnlineVersion);
+        OUString updateVersion;
+        if (dp_misc::compareVersions(updateVersionUser, updateVersionShared) == dp_misc::GREATER)
+            updateVersion = updateVersionUser;
+        else
+            updateVersion = updateVersionShared;
+        if (!updateVersion.isEmpty())
+        {
+
+            OUString aNewEntry[2];
+            aNewEntry[0] = updateInfo.first;
+            aNewEntry[1] = updateVersion;
+            aList.realloc( ++nCount );
+            aList.getArray()[ nCount-1 ] = ::uno::Sequence< OUString >( aNewEntry, 2 );
+        }
+    }
+    return aList;
+}
+
+
+uno::Sequence< uno::Sequence< OUString > > SAL_CALL PackageInformationProvider::getExtensionList()
+{
+    const uno::Reference<deployment::XExtensionManager> mgr =
+        deployment::ExtensionManager::get(mxContext);
+
+    if (!mgr.is())
+        return uno::Sequence< uno::Sequence< OUString > >();
+
+    const uno::Sequence< uno::Sequence< uno::Reference<deployment::XPackage > > >
+        allExt =  mgr->getAllExtensions(
+            uno::Reference< task::XAbortChannel >(),
+            uno::Reference< css_ucb::XCommandEnvironment > () );
+
+    uno::Sequence< uno::Sequence< OUString > > retList;
+
+    sal_Int32 cAllIds = allExt.getLength();
+    retList.realloc(cAllIds);
+    auto pretList = retList.getArray();
+
+    for (sal_Int32 i = 0; i < cAllIds; i++)
+    {
+        //The inner sequence contains extensions with the same identifier from
+        //all the different repositories, that is user, share, bundled.
+        const uno::Sequence< uno::Reference< deployment::XPackage > > &
+            seqExtension = allExt[i];
+        sal_Int32 cExt = seqExtension.getLength();
+        OSL_ASSERT(cExt == 3);
+        for (sal_Int32 j = 0; j < cExt; j++)
+        {
+            //ToDo according to the old code the first found extension is used
+            //even if another one with the same id has a better version.
+            uno::Reference< deployment::XPackage > const & xExtension( seqExtension[j] );
+            if (xExtension.is())
+            {
+                pretList[i] = { dp_misc::getIdentifier(xExtension), xExtension->getVersion() };
+                break;
+            }
+        }
+    }
+    return retList;
+}
+
+
+} // namespace dp_info
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_PackageInformationProvider_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& )
+{
+    return cppu::acquire(new dp_info::PackageInformationProvider(context));
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_manager.cxx b/desktop/source/deployment/manager/dp_manager.cxx
new file mode 100644
index 000000000..68765a63f
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_manager.cxx
@@ -0,0 +1,1600 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_features.h>
+
+#include <dp_interact.h>
+#include <dp_misc.h>
+#include <dp_registry.hxx>
+#include <dp_shared.hxx>
+#include <strings.hrc>
+#include <dp_ucb.h>
+#include <dp_platform.hxx>
+#include "dp_manager.h"
+#include <dp_identifier.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/string.hxx>
+#include <rtl/uri.hxx>
+#include <rtl/bootstrap.hxx>
+#include <sal/log.hxx>
+#include <tools/urlobj.hxx>
+#include <tools/diagnose_ex.h>
+#include <osl/diagnose.h>
+#include <osl/file.hxx>
+#include <osl/security.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <comphelper/logging.hxx>
+#include <comphelper/sequence.hxx>
+#include <utility>
+#include <xmlscript/xml_helper.hxx>
+#include <svl/inettype.hxx>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/beans/UnknownPropertyException.hpp>
+#include <com/sun/star/logging/LogLevel.hpp>
+#include <com/sun/star/logging/FileHandler.hpp>
+#include <com/sun/star/logging/SimpleTextFormatter.hpp>
+#include <com/sun/star/logging/XLogger.hpp>
+#include <com/sun/star/util/XUpdatable.hpp>
+#include <com/sun/star/sdbc/XResultSet.hpp>
+#include <com/sun/star/sdbc/XRow.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <com/sun/star/ucb/XContentAccess.hpp>
+#include <com/sun/star/ucb/NameClash.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/InvalidRemovedParameterException.hpp>
+#include <com/sun/star/deployment/Prerequisites.hpp>
+#include <com/sun/star/ucb/UnsupportedCommandException.hpp>
+#include <unotools/tempfile.hxx>
+
+#include <dp_descriptioninfoset.hxx>
+#include "dp_commandenvironments.hxx"
+#include "dp_properties.hxx"
+
+#include <vector>
+#include <algorithm>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+using namespace ::com::sun::star::logging;
+
+
+namespace dp_manager {
+
+namespace {
+
+struct MatchTempDir
+{
+    OUString m_str;
+    explicit MatchTempDir( OUString str ) : m_str(std::move( str )) {}
+    bool operator () ( ActivePackages::Entries::value_type const & v ) const {
+        return v.second.temporaryName.equalsIgnoreAsciiCase( m_str );
+    }
+};
+
+OUString getExtensionFolder(OUString const &  parentFolder,
+                            Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+                            Reference<uno::XComponentContext> const & xContext)
+{
+    ::ucbhelper::Content tempFolder( parentFolder, xCmdEnv, xContext );
+    Reference<sdbc::XResultSet> xResultSet(
+                StrTitle::createCursor (tempFolder, ::ucbhelper::INCLUDE_FOLDERS_ONLY ) );
+
+    OUString title;
+    if (xResultSet->next())
+    {
+        title = Reference<sdbc::XRow>(
+            xResultSet, UNO_QUERY_THROW )->getString(1 /* Title */ ) ;
+    }
+    return title;
+}
+}
+
+void PackageManagerImpl::initActivationLayer(
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (m_activePackages.isEmpty())
+    {
+        OSL_ASSERT( m_registryCache.isEmpty() );
+        // documents temp activation:
+        m_activePackagesDB.reset( new ActivePackages );
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, m_context, xCmdEnv,
+                                false /* no throw */ ))
+        {
+            // scan for all entries in m_packagesDir:
+            Reference<sdbc::XResultSet> xResultSet(
+                        StrTitle::createCursor (ucbContent, ::ucbhelper::INCLUDE_FOLDERS_AND_DOCUMENTS ) );
+
+            while (xResultSet->next())
+            {
+                Reference<sdbc::XRow> xRow( xResultSet, UNO_QUERY_THROW );
+                OUString title( xRow->getString( 1 /* Title */ ) );
+                // xxx todo: remove workaround for tdoc
+                if ( title == "this_is_a_dummy_stream_just_there_as_a_workaround_for_a_temporary_limitation_of_the_storage_api_implementation" )
+                    continue;
+                if ( title == "META-INF" )
+                    continue;
+
+                ::ucbhelper::Content sourceContent(
+                    Reference<XContentAccess>(
+                        xResultSet, UNO_QUERY_THROW )->queryContent(),
+                    xCmdEnv, m_xComponentContext );
+
+                OUString mediaType( detectMediaType( sourceContent,
+                                                     false /* no throw */) );
+                if (!mediaType.isEmpty())
+                {
+                    ActivePackages::Data dbData;
+                    insertToActivationLayer(
+                        Sequence<css::beans::NamedValue>(),mediaType, sourceContent,
+                        title, &dbData );
+
+                    insertToActivationLayerDB( title, dbData );
+                        //TODO #i73136#: insertToActivationLayerDB needs id not
+                        // title, but the whole m_activePackages.getLength()==0
+                        // case (i.e., document-relative deployment) currently
+                        // does not work, anyway.
+                }
+            }
+        }
+    }
+    else
+    {
+        // user|share:
+        OSL_ASSERT( !m_activePackages.isEmpty() );
+        m_activePackages_expanded = expandUnoRcUrl( m_activePackages );
+        m_registrationData_expanded = expandUnoRcUrl(m_registrationData);
+        if (!m_readOnly)
+            create_folder( nullptr, m_activePackages_expanded, xCmdEnv);
+
+        OUString dbName;
+        if (m_context == "user")
+            dbName = m_activePackages_expanded + ".pmap";
+        else
+        {
+            // Create the extension data base in the user installation
+            create_folder( nullptr, m_registrationData_expanded, xCmdEnv);
+            dbName = m_registrationData_expanded + "/extensions.pmap";
+        }
+        // The data base can always be written because it is always in the user installation
+        m_activePackagesDB.reset( new ActivePackages( dbName ) );
+
+        if (! m_readOnly && m_context != "bundled")
+        {
+            // clean up activation layer, scan for zombie temp dirs:
+            ActivePackages::Entries id2temp( m_activePackagesDB->getEntries() );
+
+            ::ucbhelper::Content tempFolder( m_activePackages_expanded, xCmdEnv, m_xComponentContext );
+            Reference<sdbc::XResultSet> xResultSet(
+                StrTitle::createCursor (tempFolder,
+                                         ::ucbhelper::INCLUDE_DOCUMENTS_ONLY ) );
+
+            // get all temp directories:
+            std::vector<OUString> tempEntries;
+            std::vector<OUString> removedEntries;
+            while (xResultSet->next())
+            {
+                OUString title(
+                    Reference<sdbc::XRow>(
+                        xResultSet, UNO_QUERY_THROW )->getString(
+                            1 /* Title */ ) );
+                if (title.endsWith("removed", &title))
+                {
+                    //save the file name without the "removed" part
+                    removedEntries.push_back(::rtl::Uri::encode(
+                                                title, rtl_UriCharClassPchar,
+                                                rtl_UriEncodeIgnoreEscapes,
+                                                RTL_TEXTENCODING_UTF8 ) );
+                }
+                else
+                {
+                    tempEntries.push_back( ::rtl::Uri::encode(
+                                               title, rtl_UriCharClassPchar,
+                                               rtl_UriEncodeIgnoreEscapes,
+                                               RTL_TEXTENCODING_UTF8 ) );
+                }
+            }
+
+            bool bShared = (m_context == "shared");
+            for (const OUString & tempEntry : tempEntries)
+            {
+                const MatchTempDir match( tempEntry );
+                if (std::none_of( id2temp.begin(), id2temp.end(), match ))
+                {
+                    const OUString url(
+                        makeURL(m_activePackages_expanded, tempEntry ) );
+
+                    //In case of shared extensions, new entries are regarded as
+                    //added extensions if there is no xxx.tmpremoved file.
+                    if (bShared)
+                    {
+                        if (std::find(removedEntries.begin(), removedEntries.end(), tempEntry) ==
+                            removedEntries.end())
+                        {
+                            continue;
+                        }
+                        else
+                        {
+                            //Make sure only the same user removes the extension, who
+                            //previously unregistered it. This is avoid races if multiple instances
+                            //of OOo are running which all have write access to the shared installation.
+                            //For example, a user removes the extension, but keeps OOo
+                            //running. Parts of the extension may still be loaded and used by OOo.
+                            //Therefore the extension is only deleted the next time the extension manager is
+                            //run after restarting OOo. While OOo is still running, another user starts OOo
+                            //which would deleted the extension files. If the same user starts another
+                            //instance of OOo then the lock file will prevent this.
+                            OUString aUserName;
+                            ::osl::Security aSecurity;
+                            aSecurity.getUserName( aUserName );
+                            ucbhelper::Content remFileContent(
+                                url + "removed", Reference<XCommandEnvironment>(), m_xComponentContext);
+                            std::vector<sal_Int8> data = dp_misc::readFile(remFileContent);
+                            OString osData(reinterpret_cast<const char*>(data.data()),
+                                                  data.size());
+                            OUString sData = OStringToOUString(
+                                osData, RTL_TEXTENCODING_UTF8);
+                            if (sData != aUserName)
+                                continue;
+                        }
+                    }
+                    // temp entry not needed anymore:
+                    erase_path( url + "_",
+                                Reference<XCommandEnvironment>(),
+                                false /* no throw: ignore errors */ );
+                    erase_path( url, Reference<XCommandEnvironment>(),
+                                false /* no throw: ignore errors */ );
+                    //delete the xxx.tmpremoved file
+                    erase_path(url + "removed",
+                               Reference<XCommandEnvironment>(), false);
+                }
+            }
+        }
+    }
+}
+
+
+void PackageManagerImpl::initRegistryBackends()
+{
+    if (!m_registryCache.isEmpty())
+        create_folder( nullptr, m_registryCache,
+                       Reference<XCommandEnvironment>(), false);
+    m_xRegistry.set( ::dp_registry::create(
+                         m_context, m_registryCache,
+                         m_xComponentContext ) );
+}
+
+namespace {
+
+osl::FileBase::RC createDirectory(OUString const & url) {
+    auto e = osl::Directory::create(url);
+    if (e != osl::FileBase::E_NOENT) {
+        return e;
+    }
+    INetURLObject o(url);
+    if (!o.removeSegment()) {
+        return osl::FileBase::E_INVAL; // anything but E_None/E_EXIST
+    }
+    e = createDirectory(o.GetMainURL(INetURLObject::DecodeMechanism::NONE));
+    if (e != osl::FileBase::E_None && e != osl::FileBase::E_EXIST) {
+        return e;
+    }
+    return osl::Directory::create(url);
+}
+
+bool isMacroURLReadOnly( const OUString &rMacro )
+{
+    OUString aDirURL( rMacro );
+    ::rtl::Bootstrap::expandMacros( aDirURL );
+
+    ::osl::FileBase::RC aErr = createDirectory( aDirURL );
+    if ( aErr == ::osl::FileBase::E_None )
+        return false; // it will be writeable
+    if ( aErr != ::osl::FileBase::E_EXIST )
+        return true; // some serious problem creating it
+
+    bool bError;
+    sal_uInt64 nWritten = 0;
+    OUString aFileURL( aDirURL + "/stamp.sys" );
+    ::osl::File aFile( aFileURL );
+
+    bError = aFile.open( osl_File_OpenFlag_Read |
+                         osl_File_OpenFlag_Write |
+                         osl_File_OpenFlag_Create ) != ::osl::FileBase::E_None;
+    if (!bError)
+        bError = aFile.write( "1", 1, nWritten ) != ::osl::FileBase::E_None;
+    if (aFile.close() != ::osl::FileBase::E_None)
+        bError = true;
+    if (osl::File::remove( aFileURL ) != ::osl::FileBase::E_None)
+        bError = true;
+
+    SAL_INFO(
+        "desktop.deployment",
+        "local url '" << rMacro << "' -> '" << aFileURL << "' "
+            << (bError ? "is" : "is not") << " readonly\n");
+    return bError;
+}
+
+}
+
+Reference<deployment::XPackageManager> PackageManagerImpl::create(
+    Reference<XComponentContext> const & xComponentContext,
+    OUString const & context )
+{
+    rtl::Reference<PackageManagerImpl> that = new PackageManagerImpl(
+        xComponentContext, context );
+
+    OUString logFile, stamp;
+    if ( context == "user" ) {
+        that->m_activePackages = "vnd.sun.star.expand:$UNO_USER_PACKAGES_CACHE/uno_packages";
+        that->m_registrationData = "vnd.sun.star.expand:$UNO_USER_PACKAGES_CACHE";
+        that->m_registryCache = "vnd.sun.star.expand:$UNO_USER_PACKAGES_CACHE/registry";
+        logFile = "$UNO_USER_PACKAGES_CACHE/log.txt";
+        //We use the extension .sys for the file because on Windows Vista a sys
+        //(as well as exe and dll) file
+        //will not be written in the VirtualStore. For example if the process has no
+        //admin right once cannot write to the %programfiles% folder. However, when
+        //virtualization is used, the file will be written into the VirtualStore and
+        //it appears as if one could write to %programfiles%. When we test for write
+        //access to the office/shared folder for shared extensions then this typically
+        //fails because a normal user typically cannot write to this folder. However,
+        //using virtualization it appears that he/she can. Then a shared extension can
+        //be installed but is only visible for the user (because the extension is in
+        //the virtual store).
+        stamp = "$UNO_USER_PACKAGES_CACHE";
+    }
+    else if ( context == "shared" ) {
+        that->m_activePackages = "vnd.sun.star.expand:$UNO_SHARED_PACKAGES_CACHE/uno_packages";
+        that->m_registrationData = "vnd.sun.star.expand:$SHARED_EXTENSIONS_USER";
+        that->m_registryCache = "vnd.sun.star.expand:$SHARED_EXTENSIONS_USER/registry";
+        logFile = "$SHARED_EXTENSIONS_USER/log.txt";
+#if !HAVE_FEATURE_READONLY_INSTALLSET
+        // The "shared" extensions are read-only when we have a
+        // read-only installset.
+        stamp = "$UNO_SHARED_PACKAGES_CACHE";
+#endif
+    }
+    else if ( context == "bundled" ) {
+        that->m_activePackages = "vnd.sun.star.expand:$BUNDLED_EXTENSIONS";
+        that->m_registrationData = "vnd.sun.star.expand:$BUNDLED_EXTENSIONS_USER";
+        that->m_registryCache = "vnd.sun.star.expand:$BUNDLED_EXTENSIONS_USER/registry";
+        logFile = "$BUNDLED_EXTENSIONS_USER/log.txt";
+        //No stamp file. We assume that bundled is always readonly. It must not be
+        //modified from ExtensionManager but only by the installer
+    }
+    else if ( context == "tmp" ) {
+        that->m_activePackages = "vnd.sun.star.expand:$TMP_EXTENSIONS/extensions";
+        that->m_registrationData = "vnd.sun.star.expand:$TMP_EXTENSIONS";
+        that->m_registryCache = "vnd.sun.star.expand:$TMP_EXTENSIONS/registry";
+        stamp = "$TMP_EXTENSIONS";
+    }
+    else if (context == "bak") {
+        that->m_activePackages = "vnd.sun.star.expand:$BAK_EXTENSIONS/extensions";
+        that->m_registrationData = "vnd.sun.star.expand:$BAK_EXTENSIONS";
+        that->m_registryCache = "vnd.sun.star.expand:$BAK_EXTENSIONS/registry";
+        stamp = "$BAK_EXTENSIONS";
+    }
+
+    else if (! context.match("vnd.sun.star.tdoc:/")) {
+        throw lang::IllegalArgumentException(
+            "invalid context given: " + context,
+            Reference<XInterface>(), static_cast<sal_Int16>(-1) );
+    }
+
+    Reference<XCommandEnvironment> xCmdEnv;
+
+    try {
+        // There is no stamp for the bundled folder:
+        if (!stamp.isEmpty())
+            that->m_readOnly = isMacroURLReadOnly( stamp );
+
+        if (!that->m_readOnly && !logFile.isEmpty())
+        {
+            // Initialize logger which will be used in ProgressLogImpl (created below)
+            rtl::Bootstrap::expandMacros(logFile);
+            comphelper::EventLogger logger(xComponentContext, "unopkg");
+            const Reference<XLogger> xLogger(logger.getLogger());
+            Reference<XLogFormatter> xLogFormatter(SimpleTextFormatter::create(xComponentContext));
+            Sequence < beans::NamedValue > aSeq2 { { "Formatter", Any(xLogFormatter) }, {"FileURL", Any(logFile)} };
+            Reference<XLogHandler> xFileHandler(css::logging::FileHandler::createWithSettings(xComponentContext, aSeq2));
+            xFileHandler->setLevel(LogLevel::WARNING);
+            xLogger->addLogHandler(xFileHandler);
+
+            that->m_xLogFile.set(
+                that->m_xComponentContext->getServiceManager()
+                ->createInstanceWithArgumentsAndContext(
+                    "com.sun.star.comp.deployment.ProgressLog",
+                    Sequence<Any>(),
+                    that->m_xComponentContext ),
+                UNO_QUERY_THROW );
+            xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv, that->m_xLogFile ) );
+        }
+
+        that->initRegistryBackends();
+        that->initActivationLayer( xCmdEnv );
+
+        return that;
+
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception & e) {
+        Any exc( ::cppu::getCaughtException() );
+        throw lang::WrappedTargetRuntimeException(
+            ("[context=\"" + context + "\"] caught unexpected "
+             + exc.getValueType().getTypeName() + ": " + e.Message),
+            Reference<XInterface>(), exc );
+    }
+}
+
+
+PackageManagerImpl::~PackageManagerImpl()
+{
+}
+
+
+void PackageManagerImpl::fireModified()
+{
+    ::cppu::OInterfaceContainerHelper * pContainer = rBHelper.getContainer(
+        cppu::UnoType<util::XModifyListener>::get() );
+    if (pContainer != nullptr) {
+        pContainer->forEach<util::XModifyListener>(
+            [this] (uno::Reference<util::XModifyListener> const& xListener)
+                { return xListener->modified(lang::EventObject(static_cast<OWeakObject *>(this))); });
+    }
+}
+
+
+void PackageManagerImpl::disposing()
+{
+    try {
+//     // xxx todo: guarding?
+//     ::osl::MutexGuard guard( getMutex() );
+        try_dispose( m_xLogFile );
+        m_xLogFile.clear();
+        try_dispose( m_xRegistry );
+        m_xRegistry.clear();
+        m_activePackagesDB.reset();
+        m_xComponentContext.clear();
+
+        t_pm_helper::disposing();
+
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        throw lang::WrappedTargetRuntimeException(
+            "caught unexpected exception while disposing...",
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+// XComponent
+
+void PackageManagerImpl::dispose()
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::dispose();
+}
+
+
+void PackageManagerImpl::addEventListener(
+    Reference<lang::XEventListener> const & xListener )
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::addEventListener( xListener );
+}
+
+
+void PackageManagerImpl::removeEventListener(
+    Reference<lang::XEventListener> const & xListener )
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::removeEventListener( xListener );
+}
+
+// XPackageManager
+
+OUString PackageManagerImpl::getContext()
+{
+    check();
+    return m_context;
+}
+
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+PackageManagerImpl::getSupportedPackageTypes()
+{
+    OSL_ASSERT( m_xRegistry.is() );
+    return m_xRegistry->getSupportedPackageTypes();
+}
+
+
+Reference<task::XAbortChannel> PackageManagerImpl::createAbortChannel()
+{
+    check();
+    return new AbortChannel;
+}
+
+// XModifyBroadcaster
+
+void PackageManagerImpl::addModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+    check();
+    rBHelper.addListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+
+void PackageManagerImpl::removeModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+    check();
+    rBHelper.removeListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+
+OUString PackageManagerImpl::detectMediaType(
+    ::ucbhelper::Content const & ucbContent_, bool throw_exc )
+{
+    ::ucbhelper::Content ucbContent(ucbContent_);
+    OUString url( ucbContent.getURL() );
+    OUString mediaType;
+    if (url.match( "vnd.sun.star.tdoc:" ) || url.match( "vnd.sun.star.pkg:" ))
+    {
+        try {
+            ucbContent.getPropertyValue( "MediaType" ) >>= mediaType;
+        }
+        catch (const beans::UnknownPropertyException &) {
+        }
+        OSL_ENSURE( !mediaType.isEmpty(), "### no media-type?!" );
+    }
+    if (mediaType.isEmpty())
+    {
+        try {
+            Reference<deployment::XPackage> xPackage(
+                m_xRegistry->bindPackage(
+                    url, OUString(), false, OUString(), ucbContent.getCommandEnvironment() ) );
+            const Reference<deployment::XPackageTypeInfo> xPackageType(
+                xPackage->getPackageType() );
+            OSL_ASSERT( xPackageType.is() );
+            if (xPackageType.is())
+                mediaType = xPackageType->getMediaType();
+        }
+        catch (const lang::IllegalArgumentException &) {
+            if (throw_exc)
+                throw;
+            css::uno::Any ex( cppu::getCaughtException() );
+            SAL_WARN( "desktop", exceptionToString(ex) );
+        }
+    }
+    return mediaType;
+}
+
+
+OUString PackageManagerImpl::insertToActivationLayer(
+    Sequence<beans::NamedValue> const & properties,
+    OUString const & mediaType, ::ucbhelper::Content const & sourceContent_,
+    OUString const & title, ActivePackages::Data * dbData )
+{
+    ::ucbhelper::Content sourceContent(sourceContent_);
+    Reference<XCommandEnvironment> xCmdEnv(
+        sourceContent.getCommandEnvironment() );
+
+    OUString baseDir(m_activePackages_expanded);
+    ::utl::TempFile aTemp(&baseDir, false);
+    OUString tempEntry = aTemp.GetURL();
+    tempEntry = tempEntry.copy(tempEntry.lastIndexOf('/') + 1);
+    OUString destFolder = makeURL( m_activePackages, tempEntry) + "_";
+
+    // prepare activation folder:
+    ::ucbhelper::Content destFolderContent;
+    create_folder( &destFolderContent, destFolder, xCmdEnv );
+
+    // copy content into activation temp dir:
+    if (mediaType.matchIgnoreAsciiCase("application/vnd.sun.star.package-bundle") ||
+        // xxx todo: more sophisticated parsing
+        mediaType.matchIgnoreAsciiCase("application/vnd.sun.star.legacy-package-bundle"))
+    {
+        // inflate content:
+        OUStringBuffer buf;
+        if (!sourceContent.isFolder())
+        {
+            buf.append( "vnd.sun.star.zip://" );
+            buf.append( ::rtl::Uri::encode( sourceContent.getURL(),
+                                            rtl_UriCharClassRegName,
+                                            rtl_UriEncodeIgnoreEscapes,
+                                            RTL_TEXTENCODING_UTF8 ) );
+        }
+        else
+        {
+            //Folder. No need to unzip, just copy
+            buf.append(sourceContent.getURL());
+        }
+        buf.append( '/' );
+        sourceContent = ::ucbhelper::Content(
+            buf.makeStringAndClear(), xCmdEnv, m_xComponentContext );
+    }
+    destFolderContent.transferContent(
+            sourceContent, ::ucbhelper::InsertOperation::Copy,
+            title, NameClash::OVERWRITE );
+
+
+    // write to DB:
+    //bundled extensions should only be added by the synchronizeAddedExtensions
+    //functions. Moreover, there is no "temporary folder" for bundled extensions.
+    OSL_ASSERT(!(m_context == "bundled"));
+    OUString sFolderUrl = makeURLAppendSysPathSegment(destFolderContent.getURL(), title);
+    DescriptionInfoset info =
+        dp_misc::getDescriptionInfoset(sFolderUrl);
+    dbData->temporaryName = tempEntry;
+    dbData->fileName = title;
+    dbData->mediaType = mediaType;
+    dbData->version = info.getVersion();
+
+    //No write the properties file next to the extension
+    ExtensionProperties props(sFolderUrl, properties, xCmdEnv, m_xComponentContext);
+    props.write();
+    return destFolder;
+}
+
+
+void PackageManagerImpl::insertToActivationLayerDB(
+    OUString const & id, ActivePackages::Data const & dbData )
+{
+    //access to the database must be guarded. See removePackage
+    const ::osl::MutexGuard guard( m_aMutex );
+    m_activePackagesDB->put( id, dbData );
+}
+
+
+/* The function returns true if there is an extension with the same id already
+    installed which needs to be uninstalled, before the new extension can be installed.
+*/
+bool PackageManagerImpl::isInstalled(
+    Reference<deployment::XPackage> const & package)
+{
+    OUString id(dp_misc::getIdentifier(package));
+    OUString fn(package->getName());
+    bool bInstalled = false;
+    if (m_activePackagesDB->has( id, fn ))
+    {
+        bInstalled = true;
+    }
+    return bInstalled;
+}
+
+// XPackageManager
+
+Reference<deployment::XPackage> PackageManagerImpl::importExtension(
+    Reference<deployment::XPackage> const & extension,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    return addPackage(extension->getURL(), Sequence<beans::NamedValue>(),
+                      OUString(), xAbortChannel, xCmdEnv_);
+}
+
+/* The function adds an extension but does not register it!!!
+    It may not do any user interaction. This is done in XExtensionManager::addExtension
+*/
+Reference<deployment::XPackage> PackageManagerImpl::addPackage(
+    OUString const & url,
+    css::uno::Sequence<css::beans::NamedValue> const & properties,
+    OUString const & mediaType_,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    check();
+    if (m_readOnly)
+    {
+        OUString message;
+        if (m_context == "shared")
+            message = "You need write permissions to install a shared extension!";
+        else
+            message = "You need write permissions to install this extension!";
+        throw deployment::DeploymentException(
+            message, static_cast<OWeakObject *>(this), Any() );
+    }
+    Reference<XCommandEnvironment> xCmdEnv;
+    if (m_xLogFile.is())
+        xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv_, m_xLogFile ) );
+    else
+        xCmdEnv.set( xCmdEnv_ );
+
+    try {
+        ::ucbhelper::Content sourceContent;
+        (void)create_ucb_content( &sourceContent, url, xCmdEnv ); // throws exc
+        const OUString title( StrTitle::getTitle( sourceContent ) );
+        const OUString title_enc( ::rtl::Uri::encode(
+                                      title, rtl_UriCharClassPchar,
+                                      rtl_UriEncodeIgnoreEscapes,
+                                      RTL_TEXTENCODING_UTF8 ) );
+        OUString destFolder;
+
+        OUString mediaType(mediaType_);
+        if (mediaType.isEmpty())
+            mediaType = detectMediaType( sourceContent );
+
+        Reference<deployment::XPackage> xPackage;
+        // copy file:
+        progressUpdate(
+            DpResId(RID_STR_COPYING_PACKAGE) + title, xCmdEnv );
+        if (m_activePackages.isEmpty())
+        {
+            ::ucbhelper::Content docFolderContent;
+            create_folder( &docFolderContent, m_context, xCmdEnv );
+            // copy into document, first:
+            docFolderContent.transferContent(
+                    sourceContent, ::ucbhelper::InsertOperation::Copy,
+                    OUString(),
+                    NameClash::ASK /* xxx todo: ASK not needed? */);
+            // set media-type:
+            ::ucbhelper::Content docContent(
+                makeURL( m_context, title_enc ), xCmdEnv, m_xComponentContext );
+                //TODO #i73136#: using title instead of id can lead to
+                // clashes, but the whole m_activePackages.getLength()==0
+                // case (i.e., document-relative deployment) currently does
+                // not work, anyway.
+            docContent.setPropertyValue("MediaType", Any(mediaType) );
+
+            // xxx todo: obsolete in the future
+            try {
+                docFolderContent.executeCommand( "flush", Any() );
+            }
+            catch (const UnsupportedCommandException &) {
+            }
+        }
+        ActivePackages::Data dbData;
+        destFolder = insertToActivationLayer(
+            properties, mediaType, sourceContent, title, &dbData );
+
+
+        // bind activation package:
+        //Because every shared/user extension will be unpacked in a folder,
+        //which was created with a unique name we will always have two different
+        //XPackage objects, even if the second extension is the same.
+        //Therefore bindPackage does not need a guard here.
+        xPackage = m_xRegistry->bindPackage(
+            makeURL( destFolder, title_enc ), mediaType, false, OUString(), xCmdEnv );
+
+        OSL_ASSERT( xPackage.is() );
+        if (xPackage.is())
+        {
+            bool install = false;
+            try
+            {
+                OUString const id = dp_misc::getIdentifier( xPackage );
+
+                ::osl::MutexGuard g(m_addMutex);
+                if (isInstalled(xPackage))
+                {
+                    //Do not guard the complete function with the getMutex
+                    removePackage(id, xPackage->getName(), xAbortChannel,
+                                  xCmdEnv);
+                }
+                install = true;
+                insertToActivationLayerDB(id, dbData);
+            }
+            catch (...)
+            {
+                deletePackageFromCache( xPackage, destFolder );
+                throw;
+            }
+            if (!install)
+            {
+                deletePackageFromCache( xPackage, destFolder );
+            }
+            //ToDo: We should notify only if the extension is registered
+            fireModified();
+        }
+        return xPackage;
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const CommandAbortedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const deployment::DeploymentException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        logIntern( exc );
+        throw deployment::DeploymentException(
+            DpResId(RID_STR_ERROR_WHILE_ADDING) + url,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+void PackageManagerImpl::deletePackageFromCache(
+    Reference<deployment::XPackage> const & xPackage,
+    OUString const & destFolder)
+{
+    try_dispose( xPackage );
+
+    //we remove the package from the uno cache
+    //no service from the package may be loaded at this time!!!
+    erase_path( destFolder, Reference<XCommandEnvironment>(),
+        false /* no throw: ignore errors */ );
+    //rm last character '_'
+    OUString url = destFolder.copy(0, destFolder.getLength() - 1);
+    erase_path( url, Reference<XCommandEnvironment>(),
+        false /* no throw: ignore errors */ );
+
+}
+
+void PackageManagerImpl::removePackage(
+    OUString const & id, OUString const & fileName,
+    Reference<task::XAbortChannel> const & /*xAbortChannel*/,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    check();
+
+    Reference<XCommandEnvironment> xCmdEnv;
+    if (m_xLogFile.is())
+        xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv_, m_xLogFile ) );
+    else
+        xCmdEnv.set( xCmdEnv_ );
+
+    try {
+        Reference<deployment::XPackage> xPackage;
+        {
+            const ::osl::MutexGuard guard(m_aMutex);
+            //Check if this extension exist and throw an IllegalArgumentException
+            //if it does not
+            //If the files of the extension are already removed, or there is a
+            //different extension at the same place, for example after updating the
+            //extension, then the returned object is that which uses the database data.
+            xPackage = getDeployedPackage_(id, fileName, xCmdEnv );
+
+
+            //Because the extension is only removed the next time the extension
+            //manager runs after restarting OOo, we need to indicate that a
+            //shared extension was "deleted". When a user starts OOo, then it
+            //will check if something changed in the shared repository. Based on
+            //the flag file it will then recognize, that the extension was
+            //deleted and can then update the extension database of the shared
+            //extensions in the user installation.
+            if ( xPackage.is() && !m_readOnly && !xPackage->isRemoved() && (m_context == "shared"))
+            {
+                ActivePackages::Data val;
+                m_activePackagesDB->get( & val, id, fileName);
+                OSL_ASSERT(!val.temporaryName.isEmpty());
+                OUString url(makeURL(m_activePackages_expanded,
+                                     val.temporaryName + "removed"));
+                ::ucbhelper::Content contentRemoved(url, xCmdEnv, m_xComponentContext);
+                OUString aUserName;
+                ::osl::Security aSecurity;
+                aSecurity.getUserName( aUserName );
+
+                OString stamp = OUStringToOString(aUserName, RTL_TEXTENCODING_UTF8);
+                Reference<css::io::XInputStream> xData(
+                    ::xmlscript::createInputStream(
+                            reinterpret_cast<sal_Int8 const *>(stamp.getStr()),
+                            stamp.getLength() ) );
+                contentRemoved.writeStream( xData, true /* replace existing */ );
+            }
+            m_activePackagesDB->erase( id, fileName ); // to be removed upon next start
+            //remove any cached data hold by the backend
+            m_xRegistry->packageRemoved(xPackage->getURL(), xPackage->getPackageType()->getMediaType());
+        }
+        try_dispose( xPackage );
+
+        fireModified();
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const CommandAbortedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const deployment::DeploymentException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        logIntern( exc );
+        throw deployment::DeploymentException(
+            DpResId(RID_STR_ERROR_WHILE_REMOVING) + id,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+OUString PackageManagerImpl::getDeployPath( ActivePackages::Data const & data )
+{
+    OUStringBuffer buf;
+    buf.append( data.temporaryName );
+    //The bundled extensions are not contained in an additional folder
+    //with a unique name. data.temporaryName contains already the
+    //UTF8 encoded folder name. See PackageManagerImpl::synchronize
+    if (m_context != "bundled")
+    {
+        buf.append( "_/" );
+        buf.append( ::rtl::Uri::encode( data.fileName, rtl_UriCharClassPchar,
+                                    rtl_UriEncodeIgnoreEscapes,
+                                    RTL_TEXTENCODING_UTF8 ) );
+    }
+    return makeURL( m_activePackages, buf.makeStringAndClear() );
+}
+
+
+Reference<deployment::XPackage> PackageManagerImpl::getDeployedPackage_(
+    OUString const & id, OUString const & fileName,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    ActivePackages::Data val;
+    if (m_activePackagesDB->get( &val, id, fileName ))
+    {
+        return getDeployedPackage_( id, val, xCmdEnv );
+    }
+    throw lang::IllegalArgumentException(
+        DpResId(RID_STR_NO_SUCH_PACKAGE) + id,
+        static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+}
+
+
+Reference<deployment::XPackage> PackageManagerImpl::getDeployedPackage_(
+    std::u16string_view id, ActivePackages::Data const & data,
+    Reference<XCommandEnvironment> const & xCmdEnv, bool ignoreAlienPlatforms )
+{
+    if (ignoreAlienPlatforms)
+    {
+        OUString type, subType;
+        INetContentTypeParameterList params;
+        if (INetContentTypes::parse( data.mediaType, type, subType, &params ))
+        {
+            auto const iter = params.find(OString("platform"));
+            if (iter != params.end() && !platform_fits(iter->second.m_sValue))
+                throw lang::IllegalArgumentException(
+                    DpResId(RID_STR_NO_SUCH_PACKAGE) + id,
+                    static_cast<OWeakObject *>(this),
+                    static_cast<sal_Int16>(-1) );
+        }
+    }
+    Reference<deployment::XPackage> xExtension;
+    try
+    {
+        //Ignore extensions where XPackage::checkPrerequisites failed.
+        //They must not be usable for this user.
+        if (data.failedPrerequisites == "0")
+        {
+            xExtension = m_xRegistry->bindPackage(
+                getDeployPath( data ), data.mediaType, false, OUString(), xCmdEnv );
+        }
+    }
+    catch (const deployment::InvalidRemovedParameterException& e)
+    {
+        xExtension = e.Extension;
+    }
+    return xExtension;
+}
+
+
+Sequence< Reference<deployment::XPackage> >
+PackageManagerImpl::getDeployedPackages_(
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    std::vector< Reference<deployment::XPackage> > packages;
+    ActivePackages::Entries id2temp( m_activePackagesDB->getEntries() );
+    for (auto const& elem : id2temp)
+    {
+        if (elem.second.failedPrerequisites != "0")
+            continue;
+        try {
+            packages.push_back(
+                getDeployedPackage_(
+                    elem.first, elem.second, xCmdEnv,
+                    true /* xxx todo: think of GUI:
+                            ignore other platforms than the current one */ ) );
+        }
+        catch (const lang::IllegalArgumentException &) {
+            // ignore
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+        catch (const deployment::DeploymentException&) {
+            // ignore
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+    }
+    return comphelper::containerToSequence(packages);
+}
+
+
+Reference<deployment::XPackage> PackageManagerImpl::getDeployedPackage(
+    OUString const & id, OUString const & fileName,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    check();
+    Reference<XCommandEnvironment> xCmdEnv;
+    if (m_xLogFile.is())
+        xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv_, m_xLogFile ) );
+    else
+        xCmdEnv.set( xCmdEnv_ );
+
+    try {
+        const ::osl::MutexGuard guard( m_aMutex );
+        return getDeployedPackage_( id, fileName, xCmdEnv );
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const deployment::DeploymentException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        logIntern( exc );
+        throw deployment::DeploymentException(
+            // ought never occur...
+            "error while accessing deployed package: " + id,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+Sequence< Reference<deployment::XPackage> >
+PackageManagerImpl::getDeployedPackages(
+    Reference<task::XAbortChannel> const &,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    check();
+    Reference<XCommandEnvironment> xCmdEnv;
+    if (m_xLogFile.is())
+        xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv_, m_xLogFile ) );
+    else
+        xCmdEnv.set( xCmdEnv_ );
+
+    try {
+        const ::osl::MutexGuard guard( m_aMutex );
+        return getDeployedPackages_( xCmdEnv );
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const CommandAbortedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const deployment::DeploymentException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        logIntern( exc );
+        throw deployment::DeploymentException(
+            // ought never occur...
+            "error while getting all deployed packages: " + m_context,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+//ToDo: the function must not call registerPackage, do this in
+//XExtensionManager.reinstallDeployedExtensions
+void PackageManagerImpl::reinstallDeployedPackages(
+    sal_Bool force, Reference<task::XAbortChannel> const &  /*xAbortChannel*/,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    check();
+    if (!force && office_is_running())
+        throw RuntimeException(
+            "You must close any running Office process before reinstalling packages!",
+            static_cast<OWeakObject *>(this) );
+
+    Reference<XCommandEnvironment> xCmdEnv;
+    if (m_xLogFile.is())
+        xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv_, m_xLogFile ) );
+    else
+        xCmdEnv.set( xCmdEnv_ );
+
+    try {
+        ProgressLevel progress(
+            xCmdEnv, "Reinstalling all deployed packages..." );
+
+        try_dispose( m_xRegistry );
+        m_xRegistry.clear();
+        if (!m_registryCache.isEmpty())
+            erase_path( m_registryCache, xCmdEnv );
+        initRegistryBackends();
+        Reference<util::XUpdatable> xUpdatable( m_xRegistry, UNO_QUERY );
+        if (xUpdatable.is())
+            xUpdatable->update();
+
+        //registering is done by the ExtensionManager service.
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const CommandAbortedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const deployment::DeploymentException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        logIntern( exc );
+        throw deployment::DeploymentException(
+            "Error while reinstalling all previously deployed packages of context " + m_context,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+sal_Bool SAL_CALL PackageManagerImpl::isReadOnly(  )
+{
+    return m_readOnly;
+}
+bool PackageManagerImpl::synchronizeRemovedExtensions(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<css::ucb::XCommandEnvironment> const & xCmdEnv)
+{
+
+    //find all which are in the extension data base but which
+    //are removed already.
+    OSL_ASSERT(!(m_context == "user"));
+    bool bModified = false;
+    ActivePackages::Entries id2temp( m_activePackagesDB->getEntries() );
+
+    bool bShared = (m_context == "shared");
+
+    for (auto const& elem : id2temp)
+    {
+        try
+        {
+            //Get the URL to the extensions folder, first make the url for the
+            //shared repository including the temporary name
+            OUString url = makeURL(m_activePackages, elem.second.temporaryName);
+            if (bShared)
+                url = makeURLAppendSysPathSegment( url + "_", elem.second.fileName);
+
+            bool bRemoved = false;
+            //Check if the URL to the extension is still the same
+            ::ucbhelper::Content contentExtension;
+
+            if (!create_ucb_content(
+                    &contentExtension, url,
+                    Reference<XCommandEnvironment>(), false))
+            {
+                bRemoved = true;
+            }
+
+            //The folder is in the extension database, but it can still be deleted.
+            //look for the xxx.tmpremoved file
+            //There can also be the case that a different extension was installed
+            //in a "temp" folder with name that is already used.
+            if (!bRemoved && bShared)
+            {
+                ::ucbhelper::Content contentRemoved;
+
+                if (create_ucb_content(
+                        &contentRemoved,
+                        m_activePackages_expanded + "/" +
+                        elem.second.temporaryName + "removed",
+                        Reference<XCommandEnvironment>(), false))
+                {
+                    bRemoved = true;
+                }
+            }
+
+            if (!bRemoved)
+            {
+                //There may be another extensions at the same place
+                dp_misc::DescriptionInfoset infoset =
+                    dp_misc::getDescriptionInfoset(url);
+                OSL_ENSURE(infoset.hasDescription() && infoset.getIdentifier(),
+                           "Extension Manager: bundled and shared extensions "
+                           "must have an identifier and a version");
+                if (infoset.hasDescription() &&
+                    infoset.getIdentifier() &&
+                    ( elem.first != *(infoset.getIdentifier())
+                      || elem.second.version != infoset.getVersion()))
+                {
+                    bRemoved = true;
+                }
+
+            }
+            if (bRemoved)
+            {
+                Reference<deployment::XPackage> xPackage = m_xRegistry->bindPackage(
+                    url, elem.second.mediaType, true, elem.first, xCmdEnv );
+                OSL_ASSERT(xPackage.is()); //Even if the files are removed, we must get the object.
+                xPackage->revokePackage(true, xAbortChannel, xCmdEnv);
+                removePackage(xPackage->getIdentifier().Value, xPackage->getName(),
+                              xAbortChannel, xCmdEnv);
+                bModified = true;
+            }
+        }
+        catch( const uno::Exception & )
+        {
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "");
+        }
+    }
+    return bModified;
+}
+
+
+bool PackageManagerImpl::synchronizeAddedExtensions(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<css::ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    bool bModified = false;
+    OSL_ASSERT(!(m_context == "user"));
+
+    ActivePackages::Entries id2temp( m_activePackagesDB->getEntries() );
+    //check if the folder exist at all. The shared extension folder
+    //may not exist for a normal user.
+    bool bOk=true;
+    try
+    {
+        bOk = create_ucb_content(
+                nullptr, m_activePackages_expanded, Reference<css::ucb::XCommandEnvironment>(), false);
+    }
+    catch (const css::ucb::ContentCreationException&)
+    {
+        bOk = false;
+    }
+
+    if (!bOk)
+        return bModified;
+
+    ::ucbhelper::Content tempFolder( m_activePackages_expanded, xCmdEnv, m_xComponentContext );
+    Reference<sdbc::XResultSet> xResultSet(
+        StrTitle::createCursor( tempFolder,
+                                ::ucbhelper::INCLUDE_FOLDERS_ONLY ) );
+
+    while (xResultSet->next())
+    {
+        try
+        {
+            OUString title(
+                Reference<sdbc::XRow>(
+                    xResultSet, UNO_QUERY_THROW )->getString(
+                        1 /* Title */ ) );
+            //The temporary folders of user and shared have an '_' at then end.
+            //But the name in ActivePackages.temporaryName is saved without.
+            OUString title2 = title;
+            bool bShared = (m_context == "shared");
+            if (bShared)
+            {
+                OSL_ASSERT(title2.endsWith("_"));
+                title2 = title2.copy(0, title2.getLength() -1);
+            }
+            OUString titleEncoded =  ::rtl::Uri::encode(
+                title2, rtl_UriCharClassPchar,
+                rtl_UriEncodeIgnoreEscapes,
+                RTL_TEXTENCODING_UTF8);
+
+            //It is sufficient to check for the folder name, because when the administrator
+            //installed the extension it was already checked if there is one with the
+            //same identifier.
+            const MatchTempDir match(titleEncoded);
+            if (std::none_of( id2temp.begin(), id2temp.end(), match ))
+            {
+
+                // The folder was not found in the data base, so it must be
+                // an added extension
+                OUString url(m_activePackages_expanded + "/" + titleEncoded);
+                OUString sExtFolder;
+                if (bShared) //that is, shared
+                {
+                    //Check if the extension was not "deleted" already which is indicated
+                    //by a xxx.tmpremoved file
+                    ::ucbhelper::Content contentRemoved;
+                    if (create_ucb_content(&contentRemoved, url + "removed",
+                                           Reference<XCommandEnvironment>(), false))
+                        continue;
+                    sExtFolder = getExtensionFolder(
+                        m_activePackages_expanded + "/" + titleEncoded + "_",
+                        xCmdEnv, m_xComponentContext);
+                    url = makeURLAppendSysPathSegment(m_activePackages_expanded, title);
+                    url = makeURLAppendSysPathSegment(url, sExtFolder);
+                }
+                Reference<deployment::XPackage> xPackage = m_xRegistry->bindPackage(
+                    url, OUString(), false, OUString(), xCmdEnv );
+                if (xPackage.is())
+                {
+                    OUString id = dp_misc::getIdentifier( xPackage );
+
+                    //Prepare the database entry
+                    ActivePackages::Data dbData;
+
+                    dbData.temporaryName = titleEncoded;
+                    if (bShared)
+                        dbData.fileName = sExtFolder;
+                    else
+                        dbData.fileName = title;
+                    dbData.mediaType = xPackage->getPackageType()->getMediaType();
+                    dbData.version = xPackage->getVersion();
+                    SAL_WARN_IF(
+                        dbData.version.isEmpty(), "desktop.deployment",
+                        "bundled/shared extension " << id << " at <" << url
+                            << "> has no explicit version");
+
+                    //We provide a special command environment that will prevent
+                    //showing a license if simple-license/@accept-by = "admin"
+                    //It will also prevent showing the license for bundled extensions
+                    //which is not supported.
+                    OSL_ASSERT(!(m_context == "user"));
+
+                    // shall the license be suppressed?
+                    DescriptionInfoset info =
+                        dp_misc::getDescriptionInfoset(url);
+                    ::std::optional<dp_misc::SimpleLicenseAttributes>
+                          attr = info.getSimpleLicenseAttributes();
+                    ExtensionProperties props(url, xCmdEnv, m_xComponentContext);
+                    bool bNoLicense = false;
+                    if (attr && attr->suppressIfRequired && props.isSuppressedLicense())
+                        bNoLicense = true;
+
+                    Reference<ucb::XCommandEnvironment> licCmdEnv(
+                        new LicenseCommandEnv(xCmdEnv->getInteractionHandler(),
+                                              bNoLicense, m_context));
+                    sal_Int32 failedPrereq = xPackage->checkPrerequisites(
+                        xAbortChannel, licCmdEnv, false);
+                    //Remember that this failed. For example, the user
+                    //could have declined the license. Then the next time the
+                    //extension folder is investigated we do not want to
+                    //try to install the extension again.
+                    dbData.failedPrerequisites = OUString::number(failedPrereq);
+                    insertToActivationLayerDB(id, dbData);
+                    bModified = true;
+                }
+            }
+        }
+        catch (const uno::Exception &)
+        {
+            // Looks like exceptions being caught here is not an uncommon case.
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "");
+        }
+    }
+    return bModified;
+}
+
+sal_Bool PackageManagerImpl::synchronize(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<css::ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    check();
+    bool bModified = false;
+    if (m_context == "user")
+        return bModified;
+    bModified |=
+        synchronizeRemovedExtensions(xAbortChannel, xCmdEnv);
+    bModified |= synchronizeAddedExtensions(xAbortChannel, xCmdEnv);
+
+    return bModified;
+}
+
+Sequence< Reference<deployment::XPackage> > PackageManagerImpl::getExtensionsWithUnacceptedLicenses(
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    std::vector<Reference<deployment::XPackage> > vec;
+
+    try
+    {
+        const ::osl::MutexGuard guard( m_aMutex );
+        // clean up activation layer, scan for zombie temp dirs:
+        ActivePackages::Entries id2temp( m_activePackagesDB->getEntries() );
+
+        bool bShared = (m_context == "shared");
+
+        for (auto const& elem : id2temp)
+        {
+            //Get the database entry
+            ActivePackages::Data const & dbData = elem.second;
+            sal_Int32 failedPrereq = dbData.failedPrerequisites.toInt32();
+            //If the installation failed for other reason then the license then we
+            //ignore it.
+            if (failedPrereq ^ deployment::Prerequisites::LICENSE)
+                continue;
+
+            //Prepare the URL to the extension
+            OUString url = makeURL(m_activePackages, elem.second.temporaryName);
+            if (bShared)
+                url = makeURLAppendSysPathSegment( url + "_", elem.second.fileName);
+
+            Reference<deployment::XPackage> p = m_xRegistry->bindPackage(
+                url, OUString(), false, OUString(), xCmdEnv );
+
+            if (p.is())
+                vec.push_back(p);
+
+        }
+        return ::comphelper::containerToSequence(vec);
+    }
+    catch (const deployment::DeploymentException &)
+    {
+        throw;
+    }
+    catch (const RuntimeException&)
+    {
+        throw;
+    }
+    catch (...)
+    {
+        Any exc = ::cppu::getCaughtException();
+        deployment::DeploymentException de(
+            "PackageManagerImpl::getExtensionsWithUnacceptedLicenses",
+            static_cast<OWeakObject*>(this), exc);
+        exc <<= de;
+        ::cppu::throwException(exc);
+    }
+
+    return ::comphelper::containerToSequence(vec);
+}
+
+sal_Int32 PackageManagerImpl::checkPrerequisites(
+    css::uno::Reference<css::deployment::XPackage> const & extension,
+    css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    try
+    {
+        if (!extension.is())
+            return 0;
+        if (m_context != extension->getRepositoryName())
+            throw lang::IllegalArgumentException(
+                "PackageManagerImpl::checkPrerequisites: extension is not from this repository.",
+                nullptr, 0);
+
+        ActivePackages::Data dbData;
+        OUString id = dp_misc::getIdentifier(extension);
+        if (!m_activePackagesDB->get( &dbData, id, OUString()))
+        {
+            throw lang::IllegalArgumentException(
+                "PackageManagerImpl::checkPrerequisites: unknown extension",
+                nullptr, 0);
+
+        }
+        //If the license was already displayed, then do not show it again
+        Reference<ucb::XCommandEnvironment> _xCmdEnv = xCmdEnv;
+        sal_Int32 prereq = dbData.failedPrerequisites.toInt32();
+        if ( !(prereq & deployment::Prerequisites::LICENSE))
+            _xCmdEnv = new NoLicenseCommandEnv(xCmdEnv->getInteractionHandler());
+
+        sal_Int32 failedPrereq = extension->checkPrerequisites(
+            xAbortChannel, _xCmdEnv, false);
+        dbData.failedPrerequisites = OUString::number(failedPrereq);
+        insertToActivationLayerDB(id, dbData);
+        return 0;
+    }
+    catch ( const deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (...) {
+        uno::Any excOccurred = ::cppu::getCaughtException();
+        deployment::DeploymentException exc(
+            "PackageManagerImpl::checkPrerequisites: exception ",
+            static_cast<OWeakObject*>(this), excOccurred);
+        throw exc;
+    }
+}
+
+
+PackageManagerImpl::CmdEnvWrapperImpl::~CmdEnvWrapperImpl()
+{
+}
+
+
+PackageManagerImpl::CmdEnvWrapperImpl::CmdEnvWrapperImpl(
+    Reference<XCommandEnvironment> const & xUserCmdEnv,
+    Reference<XProgressHandler> const & xLogFile )
+    : m_xLogFile( xLogFile )
+{
+    if (xUserCmdEnv.is()) {
+        m_xUserProgress.set( xUserCmdEnv->getProgressHandler() );
+        m_xUserInteractionHandler.set( xUserCmdEnv->getInteractionHandler() );
+    }
+}
+
+// XCommandEnvironment
+
+Reference<task::XInteractionHandler>
+PackageManagerImpl::CmdEnvWrapperImpl::getInteractionHandler()
+{
+    return m_xUserInteractionHandler;
+}
+
+
+Reference<XProgressHandler>
+PackageManagerImpl::CmdEnvWrapperImpl::getProgressHandler()
+{
+    return this;
+}
+
+// XProgressHandler
+
+void PackageManagerImpl::CmdEnvWrapperImpl::push( Any const & Status )
+{
+    if (m_xLogFile.is())
+        m_xLogFile->push( Status );
+    if (m_xUserProgress.is())
+        m_xUserProgress->push( Status );
+}
+
+
+void PackageManagerImpl::CmdEnvWrapperImpl::update( Any const & Status )
+{
+    if (m_xLogFile.is())
+        m_xLogFile->update( Status );
+    if (m_xUserProgress.is())
+        m_xUserProgress->update( Status );
+}
+
+
+void PackageManagerImpl::CmdEnvWrapperImpl::pop()
+{
+    if (m_xLogFile.is())
+        m_xLogFile->pop();
+    if (m_xUserProgress.is())
+        m_xUserProgress->pop();
+}
+
+} // namespace dp_manager
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_manager.h b/desktop/source/deployment/manager/dp_manager.h
new file mode 100644
index 000000000..a2079da23
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_manager.h
@@ -0,0 +1,232 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include "dp_activepackages.hxx"
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <ucbhelper/content.hxx>
+#include <com/sun/star/deployment/XPackageRegistry.hpp>
+#include <com/sun/star/deployment/XPackageManager.hpp>
+#include <memory>
+#include <string_view>
+#include <utility>
+
+namespace dp_manager {
+
+typedef ::cppu::WeakComponentImplHelper<
+    css::deployment::XPackageManager > t_pm_helper;
+
+
+class PackageManagerImpl final : private cppu::BaseMutex, public t_pm_helper
+{
+    css::uno::Reference<css::uno::XComponentContext> m_xComponentContext;
+    OUString m_context;
+    OUString m_registrationData;
+    OUString m_registrationData_expanded;
+    OUString m_registryCache;
+    bool m_readOnly;
+
+    OUString m_activePackages;
+    OUString m_activePackages_expanded;
+    std::unique_ptr< ActivePackages > m_activePackagesDB;
+    //This mutex is only used for synchronization in addPackage
+    ::osl::Mutex m_addMutex;
+    css::uno::Reference<css::ucb::XProgressHandler> m_xLogFile;
+    inline void logIntern( css::uno::Any const & status );
+    void fireModified();
+
+    css::uno::Reference<css::deployment::XPackageRegistry> m_xRegistry;
+
+    void initRegistryBackends();
+    void initActivationLayer(
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv );
+    OUString detectMediaType(
+        ::ucbhelper::Content const & ucbContent, bool throw_exc = true );
+    OUString insertToActivationLayer(
+        css::uno::Sequence<css::beans::NamedValue> const & properties,
+        OUString const & mediaType,
+        ::ucbhelper::Content const & sourceContent,
+        OUString const & title, ActivePackages::Data * dbData );
+    void insertToActivationLayerDB(
+        OUString const & id, ActivePackages::Data const & dbData );
+
+    static void deletePackageFromCache(
+        css::uno::Reference<css::deployment::XPackage> const & xPackage,
+        OUString const & destFolder );
+
+    bool isInstalled(
+        css::uno::Reference<css::deployment::XPackage> const & package);
+
+    bool synchronizeRemovedExtensions(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+
+    bool synchronizeAddedExtensions(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+
+    class CmdEnvWrapperImpl
+        : public ::cppu::WeakImplHelper< css::ucb::XCommandEnvironment,
+                                          css::ucb::XProgressHandler >
+    {
+        css::uno::Reference<css::ucb::XProgressHandler> m_xLogFile;
+        css::uno::Reference<css::ucb::XProgressHandler> m_xUserProgress;
+        css::uno::Reference<css::task::XInteractionHandler>
+        m_xUserInteractionHandler;
+
+    public:
+        virtual ~CmdEnvWrapperImpl() override;
+        CmdEnvWrapperImpl(
+            css::uno::Reference<css::ucb::XCommandEnvironment>
+            const & xUserCmdEnv,
+            css::uno::Reference<css::ucb::XProgressHandler> const & xLogFile );
+
+        // XCommandEnvironment
+        virtual css::uno::Reference<css::task::XInteractionHandler> SAL_CALL
+        getInteractionHandler() override;
+        virtual css::uno::Reference<css::ucb::XProgressHandler> SAL_CALL
+        getProgressHandler() override;
+
+        // XProgressHandler
+        virtual void SAL_CALL push( css::uno::Any const & Status ) override;
+        virtual void SAL_CALL update( css::uno::Any const & Status ) override;
+        virtual void SAL_CALL pop() override;
+    };
+
+    inline void check();
+    virtual void SAL_CALL disposing() override;
+
+    virtual ~PackageManagerImpl() override;
+    PackageManagerImpl(
+        css::uno::Reference<css::uno::XComponentContext> xComponentContext, OUString context )
+        : t_pm_helper( m_aMutex ),
+          m_xComponentContext(std::move( xComponentContext )),
+          m_context(std::move( context )),
+          m_readOnly( true )
+        {}
+
+public:
+    static css::uno::Reference<css::deployment::XPackageManager> create(
+        css::uno::Reference<css::uno::XComponentContext>
+        const & xComponentContext, OUString const & context );
+
+    // XComponent
+    virtual void SAL_CALL dispose() override;
+    virtual void SAL_CALL addEventListener(
+        css::uno::Reference<css::lang::XEventListener> const & xListener ) override;
+    virtual void SAL_CALL removeEventListener(
+        css::uno::Reference<css::lang::XEventListener> const & xListener ) override;
+
+    // XModifyBroadcaster
+    virtual void SAL_CALL addModifyListener(
+        css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+    virtual void SAL_CALL removeModifyListener(
+        css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+
+    // XPackageManager
+    virtual OUString SAL_CALL getContext() override;
+    virtual css::uno::Sequence<
+        css::uno::Reference<css::deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+
+    virtual css::uno::Reference<css::task::XAbortChannel> SAL_CALL
+    createAbortChannel() override;
+
+    virtual css::uno::Reference<css::deployment::XPackage> SAL_CALL addPackage(
+        OUString const & url,
+        css::uno::Sequence<css::beans::NamedValue> const & properties,
+        OUString const & mediaType,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Reference<css::deployment::XPackage> SAL_CALL importExtension(
+        css::uno::Reference<css::deployment::XPackage> const & extension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL removePackage(
+        OUString const & id, OUString const & fileName,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    OUString getDeployPath( ActivePackages::Data const & data );
+    css::uno::Reference<css::deployment::XPackage> getDeployedPackage_(
+        OUString const & id, OUString const & fileName,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv );
+    css::uno::Reference<css::deployment::XPackage> getDeployedPackage_(
+        std::u16string_view id, ActivePackages::Data const & data,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+        bool ignoreAlienPlatforms = false );
+    virtual css::uno::Reference<css::deployment::XPackage> SAL_CALL
+    getDeployedPackage(
+        OUString const & id, OUString const & fileName,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    css::uno::Sequence< css::uno::Reference<css::deployment::XPackage> >
+    getDeployedPackages_(
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv );
+    virtual css::uno::Sequence< css::uno::Reference<css::deployment::XPackage> >
+    SAL_CALL getDeployedPackages(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL reinstallDeployedPackages(
+        sal_Bool force,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual ::sal_Bool SAL_CALL isReadOnly(  ) override;
+
+    virtual ::sal_Bool SAL_CALL synchronize(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > SAL_CALL
+    getExtensionsWithUnacceptedLicenses(
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv) override;
+
+    virtual sal_Int32 SAL_CALL checkPrerequisites(
+        css::uno::Reference<css::deployment::XPackage> const & extension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+        };
+
+
+inline void PackageManagerImpl::check()
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed)
+        throw css::lang::DisposedException(
+            "PackageManager instance has already been disposed!",
+            static_cast< ::cppu::OWeakObject * >(this) );
+}
+
+
+inline void PackageManagerImpl::logIntern( css::uno::Any const & status )
+{
+    if (m_xLogFile.is())
+        m_xLogFile->update( status );
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_managerfac.cxx b/desktop/source/deployment/manager/dp_managerfac.cxx
new file mode 100644
index 000000000..79e0ea358
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_managerfac.cxx
@@ -0,0 +1,186 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include "dp_manager.h"
+#include <dp_misc.h>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <com/sun/star/deployment/XPackageManagerFactory.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <unordered_map>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_manager::factory {
+
+typedef ::cppu::WeakComponentImplHelper<
+    deployment::XPackageManagerFactory, lang::XServiceInfo > t_pmfac_helper;
+
+namespace {
+
+class PackageManagerFactoryImpl : private cppu::BaseMutex, public t_pmfac_helper
+{
+    Reference<XComponentContext> m_xComponentContext;
+
+    Reference<deployment::XPackageManager> m_xUserMgr;
+    Reference<deployment::XPackageManager> m_xSharedMgr;
+    Reference<deployment::XPackageManager> m_xBundledMgr;
+    Reference<deployment::XPackageManager> m_xTmpMgr;
+    Reference<deployment::XPackageManager> m_xBakMgr;
+    typedef std::unordered_map<
+        OUString, WeakReference<deployment::XPackageManager> > t_string2weakref;
+    t_string2weakref m_managers;
+
+protected:
+    inline void check();
+    virtual void SAL_CALL disposing() override;
+
+public:
+    explicit PackageManagerFactoryImpl(
+        Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageManagerFactory
+    virtual Reference<deployment::XPackageManager> SAL_CALL getPackageManager(
+        OUString const & context ) override;
+};
+
+}
+
+PackageManagerFactoryImpl::PackageManagerFactoryImpl(
+    Reference<XComponentContext> const & xComponentContext )
+    : t_pmfac_helper( m_aMutex ),
+      m_xComponentContext( xComponentContext )
+{
+}
+
+// XServiceInfo
+OUString PackageManagerFactoryImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.PackageManagerFactory";
+}
+
+sal_Bool PackageManagerFactoryImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > PackageManagerFactoryImpl::getSupportedServiceNames()
+{
+    // a private one:
+    return { "com.sun.star.comp.deployment.PackageManagerFactory" };
+}
+
+inline void PackageManagerFactoryImpl::check()
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed)
+    {
+        throw lang::DisposedException(
+            "PackageManagerFactory instance has already been disposed!",
+            static_cast<OWeakObject *>(this) );
+    }
+}
+
+
+void PackageManagerFactoryImpl::disposing()
+{
+    // dispose all managers:
+    ::osl::MutexGuard guard( m_aMutex );
+    for (auto const& elem : m_managers)
+        try_dispose( elem.second );
+    m_managers = t_string2weakref();
+    // the below are already disposed:
+    m_xUserMgr.clear();
+    m_xSharedMgr.clear();
+    m_xBundledMgr.clear();
+    m_xTmpMgr.clear();
+    m_xBakMgr.clear();
+}
+
+// XPackageManagerFactory
+
+Reference<deployment::XPackageManager>
+PackageManagerFactoryImpl::getPackageManager( OUString const & context )
+{
+    Reference< deployment::XPackageManager > xRet;
+    ::osl::ResettableMutexGuard guard( m_aMutex );
+    check();
+    t_string2weakref::const_iterator const iFind( m_managers.find( context ) );
+    if (iFind != m_managers.end()) {
+        xRet = iFind->second;
+        if (xRet.is())
+            return xRet;
+    }
+
+    guard.clear();
+    xRet.set( PackageManagerImpl::create( m_xComponentContext, context ) );
+    guard.reset();
+    std::pair< t_string2weakref::iterator, bool > insertion(
+        m_managers.emplace( context, xRet ) );
+    if (insertion.second)
+    {
+        OSL_ASSERT( insertion.first->second.get() == xRet );
+        // hold user, shared mgrs for whole process: live deployment
+        if ( context == "user" )
+            m_xUserMgr = xRet;
+        else if ( context == "shared" )
+            m_xSharedMgr = xRet;
+        else if ( context == "bundled" )
+            m_xBundledMgr = xRet;
+        else if ( context == "tmp" )
+            m_xTmpMgr = xRet;
+        else if ( context == "bak" )
+            m_xBakMgr = xRet;
+    }
+    else
+    {
+        Reference< deployment::XPackageManager > xAlreadyIn(
+            insertion.first->second );
+        if (xAlreadyIn.is())
+        {
+            guard.clear();
+            try_dispose( xRet );
+            xRet = xAlreadyIn;
+        }
+        else
+        {
+            insertion.first->second = xRet;
+        }
+    }
+    return xRet;
+}
+
+} // namespace dp_manager::factory
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_PackageManagerFactory_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& )
+{
+    return cppu::acquire(new dp_manager::factory::PackageManagerFactoryImpl(context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_properties.cxx b/desktop/source/deployment/manager/dp_properties.cxx
new file mode 100644
index 000000000..b0d2245e8
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_properties.cxx
@@ -0,0 +1,145 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <xmlscript/xml_helper.hxx>
+#include <ucbhelper/content.hxx>
+
+#include <dp_ucb.h>
+#include "dp_properties.hxx"
+
+namespace lang  = com::sun::star::lang;
+namespace ucb = com::sun::star::ucb;
+namespace uno = com::sun::star::uno;
+
+
+using ::com::sun::star::uno::Reference;
+
+constexpr OUStringLiteral PROP_SUPPRESS_LICENSE = u"SUPPRESS_LICENSE";
+constexpr OUStringLiteral PROP_EXTENSION_UPDATE = u"EXTENSION_UPDATE";
+
+namespace dp_manager {
+
+//Reading the file
+ExtensionProperties::ExtensionProperties(
+    std::u16string_view urlExtension,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+    Reference<uno::XComponentContext> const & xContext) :
+    m_xCmdEnv(xCmdEnv), m_xContext(xContext)
+{
+    m_propFileUrl = OUString::Concat(urlExtension) + "properties";
+
+    std::vector< std::pair< OUString, OUString> > props;
+    if (! dp_misc::create_ucb_content(nullptr, m_propFileUrl, nullptr, false))
+        return;
+
+    ::ucbhelper::Content contentProps(m_propFileUrl, m_xCmdEnv, m_xContext);
+    dp_misc::readProperties(props, contentProps);
+
+    for (auto const& prop : props)
+    {
+        if (prop.first == PROP_SUPPRESS_LICENSE)
+            m_prop_suppress_license = prop.second;
+    }
+}
+
+//Writing the file
+ExtensionProperties::ExtensionProperties(
+    std::u16string_view urlExtension,
+    uno::Sequence<css::beans::NamedValue> const & properties,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+    Reference<uno::XComponentContext> const & xContext) :
+    m_xCmdEnv(xCmdEnv), m_xContext(xContext)
+{
+    m_propFileUrl = OUString::Concat(urlExtension) + "properties";
+
+    for (css::beans::NamedValue const & v : properties)
+    {
+        if (v.Name == PROP_SUPPRESS_LICENSE)
+        {
+            m_prop_suppress_license = getPropertyValue(v);
+        }
+        else if (v.Name == PROP_EXTENSION_UPDATE)
+        {
+            m_prop_extension_update = getPropertyValue(v);
+        }
+        else
+        {
+            throw lang::IllegalArgumentException(
+                "Extension Manager: unknown property", nullptr, -1);
+        }
+    }
+}
+
+OUString ExtensionProperties::getPropertyValue(css::beans::NamedValue const & v)
+{
+    OUString value("0");
+    if (! (v.Value >>= value) )
+    {
+        throw lang::IllegalArgumentException(
+            "Extension Manager: wrong property value", nullptr, -1);
+    }
+    return value;
+}
+void ExtensionProperties::write()
+{
+    ::ucbhelper::Content contentProps(m_propFileUrl, m_xCmdEnv, m_xContext);
+    OUString buf;
+
+    if (m_prop_suppress_license)
+    {
+        buf = OUString::Concat(PROP_SUPPRESS_LICENSE) + "=" + *m_prop_suppress_license;
+    }
+
+    OString stamp = OUStringToOString(buf, RTL_TEXTENCODING_UTF8);
+    Reference<css::io::XInputStream> xData(
+        ::xmlscript::createInputStream(
+                reinterpret_cast<sal_Int8 const *>(stamp.getStr()),
+                stamp.getLength() ) );
+    contentProps.writeStream( xData, true /* replace existing */ );
+}
+
+bool ExtensionProperties::isSuppressedLicense() const
+{
+    bool ret = false;
+    if (m_prop_suppress_license)
+    {
+        if (*m_prop_suppress_license == "1")
+            ret = true;
+    }
+    return ret;
+}
+
+bool ExtensionProperties::isExtensionUpdate() const
+{
+    bool ret = false;
+    if (m_prop_extension_update)
+    {
+        if (*m_prop_extension_update == "1")
+            ret = true;
+    }
+    return ret;
+}
+
+} // namespace dp_manager
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_properties.hxx b/desktop/source/deployment/manager/dp_properties.hxx
new file mode 100644
index 000000000..06139ece3
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_properties.hxx
@@ -0,0 +1,58 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <optional>
+#include <string_view>
+
+namespace dp_manager
+{
+class ExtensionProperties final
+{
+    OUString m_propFileUrl;
+    const css::uno::Reference<css::ucb::XCommandEnvironment> m_xCmdEnv;
+    const css::uno::Reference<css::uno::XComponentContext> m_xContext;
+    ::std::optional<OUString> m_prop_suppress_license;
+    ::std::optional<OUString> m_prop_extension_update;
+
+    static OUString getPropertyValue(css::beans::NamedValue const& v);
+
+public:
+    ExtensionProperties(std::u16string_view urlExtension,
+                        css::uno::Reference<css::ucb::XCommandEnvironment> const& xCmdEnv,
+                        css::uno::Reference<css::uno::XComponentContext> const& xContext);
+
+    ExtensionProperties(std::u16string_view urlExtension,
+                        css::uno::Sequence<css::beans::NamedValue> const& properties,
+                        css::uno::Reference<css::ucb::XCommandEnvironment> const& xCmdEnv,
+                        css::uno::Reference<css::uno::XComponentContext> const& xContext);
+
+    void write();
+
+    bool isSuppressedLicense() const;
+
+    bool isExtensionUpdate() const;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_dependencies.cxx b/desktop/source/deployment/misc/dp_dependencies.cxx
new file mode 100644
index 000000000..e187a6974
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_dependencies.cxx
@@ -0,0 +1,196 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_folders.h>
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/xml/dom/XElement.hpp>
+#include <com/sun/star/xml/dom/XNodeList.hpp>
+#include <osl/diagnose.h>
+#include <rtl/bootstrap.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <unotools/configmgr.hxx>
+
+#include <strings.hrc>
+#include <dp_shared.hxx>
+
+#include <dp_dependencies.hxx>
+#include <dp_descriptioninfoset.hxx>
+#include <dp_version.hxx>
+
+namespace {
+
+char const namespaceLibreOffice[] =
+    "http://libreoffice.org/extensions/description/2011";
+
+constexpr OUStringLiteral namespaceOpenOfficeOrg =
+    u"http://openoffice.org/extensions/description/2006";
+
+char const minimalVersionLibreOffice[] = "LibreOffice-minimal-version";
+char const maximalVersionLibreOffice[] = "LibreOffice-maximal-version";
+
+constexpr OUStringLiteral minimalVersionOpenOfficeOrg =
+    u"OpenOffice.org-minimal-version";
+
+char const maximalVersionOpenOfficeOrg[] =
+    "OpenOffice.org-maximal-version";
+
+OUString getLibreOfficeMajorMinorMicro() {
+    return utl::ConfigManager::getAboutBoxProductVersion();
+}
+
+OUString getReferenceOpenOfficeOrgMajorMinor() {
+#ifdef ANDROID
+    // just hardcode the version
+    OUString v("4.1");
+#else
+    OUString v(
+            "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version")
+            ":Version:ReferenceOOoMajorMinor}");
+    rtl::Bootstrap::expandMacros(v); //TODO: check for failure
+#endif
+    return v;
+}
+
+bool satisfiesMinimalVersion(
+    OUString const & actual, OUString const & specified)
+{
+    return dp_misc::compareVersions(actual, specified) != dp_misc::LESS;
+}
+
+bool satisfiesMaximalVersion(
+    OUString const & actual, OUString const & specified)
+{
+    return dp_misc::compareVersions(actual, specified) != dp_misc::GREATER;
+}
+
+OUString produceErrorText(
+    OUString const & reason, OUString const & version)
+{
+    return reason.replaceFirst("%VERSION",
+        (version.isEmpty()
+         ?  DpResId(RID_DEPLOYMENT_DEPENDENCIES_UNKNOWN)
+         : version));
+}
+
+}
+
+namespace dp_misc::Dependencies {
+
+css::uno::Sequence< css::uno::Reference< css::xml::dom::XElement > >
+check(dp_misc::DescriptionInfoset const & infoset) {
+    css::uno::Reference< css::xml::dom::XNodeList > deps(
+        infoset.getDependencies());
+    sal_Int32 n = deps->getLength();
+    css::uno::Sequence< css::uno::Reference< css::xml::dom::XElement > >
+        unsatisfied(n);
+    auto unsatisfiedRange = asNonConstRange(unsatisfied);
+    sal_Int32 unsat = 0;
+    // check first if minimalVersionLibreOffice is specified -- in that case ignore the legacy OOo dependencies
+    bool bIgnoreOoo = false;
+    for (sal_Int32 i = 0; i < n; ++i) {
+        css::uno::Reference< css::xml::dom::XElement > e(
+            deps->item(i), css::uno::UNO_QUERY_THROW);
+        if ( e->getNamespaceURI() == namespaceLibreOffice && e->getTagName() == minimalVersionLibreOffice)
+        {
+            bIgnoreOoo = true;
+            break;
+        }
+    }
+    for (sal_Int32 i = 0; i < n; ++i) {
+        css::uno::Reference< css::xml::dom::XElement > e(
+            deps->item(i), css::uno::UNO_QUERY_THROW);
+        bool sat = false;
+        if ( e->getNamespaceURI() == namespaceOpenOfficeOrg && e->getTagName() == minimalVersionOpenOfficeOrg )
+        {
+            sat = bIgnoreOoo || satisfiesMinimalVersion(
+                getReferenceOpenOfficeOrgMajorMinor(),
+                e->getAttribute("value"));
+        } else if ( e->getNamespaceURI() == namespaceOpenOfficeOrg && e->getTagName() == maximalVersionOpenOfficeOrg )
+        {
+            sat = bIgnoreOoo || satisfiesMaximalVersion(
+                getReferenceOpenOfficeOrgMajorMinor(),
+                e->getAttribute("value"));
+        } else if (e->getNamespaceURI() == namespaceLibreOffice && e->getTagName() == minimalVersionLibreOffice )
+        {
+            sat = satisfiesMinimalVersion(
+                getLibreOfficeMajorMinorMicro(),
+                e->getAttribute("value"));
+        } else if (e->getNamespaceURI() == namespaceLibreOffice && e->getTagName() == maximalVersionLibreOffice )
+        {
+            sat = satisfiesMaximalVersion(getLibreOfficeMajorMinorMicro(), e->getAttribute("value"));
+        } else if (e->hasAttributeNS(namespaceOpenOfficeOrg,
+                       minimalVersionOpenOfficeOrg))
+        {
+            sat = satisfiesMinimalVersion(
+                getReferenceOpenOfficeOrgMajorMinor(),
+                e->getAttributeNS(namespaceOpenOfficeOrg,
+                    minimalVersionOpenOfficeOrg));
+        }
+        if (!sat) {
+            unsatisfiedRange[unsat++] = e;
+        }
+    }
+    unsatisfied.realloc(unsat);
+    return unsatisfied;
+}
+
+OUString getErrorText(
+    css::uno::Reference< css::xml::dom::XElement > const & dependency)
+{
+    OSL_ASSERT(dependency.is());
+    if ( dependency->getNamespaceURI() == namespaceOpenOfficeOrg && dependency->getTagName() == minimalVersionOpenOfficeOrg )
+    {
+        return produceErrorText(
+                DpResId(RID_DEPLOYMENT_DEPENDENCIES_OOO_MIN),
+            dependency->getAttribute("value"));
+    } else if (dependency->getNamespaceURI() == namespaceOpenOfficeOrg && dependency->getTagName() == maximalVersionOpenOfficeOrg )
+    {
+        return produceErrorText(
+                DpResId(RID_DEPLOYMENT_DEPENDENCIES_OOO_MAX),
+            dependency->getAttribute("value"));
+    } else if (dependency->getNamespaceURI() == namespaceLibreOffice && dependency->getTagName() == minimalVersionLibreOffice )
+    {
+        return produceErrorText(
+                DpResId(RID_DEPLOYMENT_DEPENDENCIES_LO_MIN),
+            dependency->getAttribute("value"));
+    } else if (dependency->getNamespaceURI() == namespaceLibreOffice && dependency->getTagName() == maximalVersionLibreOffice )
+    {
+        return produceErrorText(
+                DpResId(RID_DEPLOYMENT_DEPENDENCIES_LO_MAX),
+            dependency->getAttribute("value"));
+    } else if (dependency->hasAttributeNS(namespaceOpenOfficeOrg,
+                   minimalVersionOpenOfficeOrg))
+    {
+        return produceErrorText(
+                DpResId(RID_DEPLOYMENT_DEPENDENCIES_OOO_MIN),
+            dependency->getAttributeNS(namespaceOpenOfficeOrg,
+                minimalVersionOpenOfficeOrg));
+    } else {
+        return DpResId(RID_DEPLOYMENT_DEPENDENCIES_UNKNOWN);
+    }
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_descriptioninfoset.cxx b/desktop/source/deployment/misc/dp_descriptioninfoset.cxx
new file mode 100644
index 000000000..00b32c04f
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_descriptioninfoset.cxx
@@ -0,0 +1,809 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <dp_descriptioninfoset.hxx>
+
+#include <dp_resource.h>
+
+#include <comphelper/sequence.hxx>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/propertysequence.hxx>
+#include <optional>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/io/SequenceInputStream.hpp>
+#include <com/sun/star/lang/XMultiComponentFactory.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/ucb/XProgressHandler.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <com/sun/star/xml/dom/DOMException.hpp>
+#include <com/sun/star/xml/dom/XNode.hpp>
+#include <com/sun/star/xml/dom/XNodeList.hpp>
+#include <com/sun/star/xml/dom/DocumentBuilder.hpp>
+#include <com/sun/star/xml/xpath/XPathAPI.hpp>
+#include <com/sun/star/xml/xpath/XPathException.hpp>
+#include <com/sun/star/ucb/InteractiveIOException.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/weak.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <ucbhelper/content.hxx>
+#include <o3tl/string_view.hxx>
+
+namespace {
+
+using css::uno::Reference;
+
+class EmptyNodeList:
+    public cppu::WeakImplHelper<css::xml::dom::XNodeList>
+{
+public:
+    EmptyNodeList();
+
+    EmptyNodeList(const EmptyNodeList&) = delete;
+    const EmptyNodeList& operator=(const EmptyNodeList&) = delete;
+
+    virtual ::sal_Int32 SAL_CALL getLength() override;
+
+    virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL
+    item(::sal_Int32 index) override;
+};
+
+EmptyNodeList::EmptyNodeList() {}
+
+::sal_Int32 EmptyNodeList::getLength() {
+    return 0;
+}
+
+css::uno::Reference< css::xml::dom::XNode > EmptyNodeList::item(::sal_Int32)
+{
+    throw css::uno::RuntimeException("bad EmptyNodeList com.sun.star.xml.dom.XNodeList.item call",
+        static_cast< ::cppu::OWeakObject * >(this));
+}
+
+OUString getNodeValue(
+    css::uno::Reference< css::xml::dom::XNode > const & node)
+{
+    OSL_ASSERT(node.is());
+    try {
+        return node->getNodeValue();
+    } catch (const css::xml::dom::DOMException & e) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw css::lang::WrappedTargetRuntimeException(
+            "com.sun.star.xml.dom.DOMException: " + e.Message,
+            nullptr, anyEx );
+    }
+}
+
+/**The class uses the UCB to access the description.xml file in an
+   extension. The UCB must have been initialized already. It also
+   requires that the extension has already be unzipped to a particular
+   location.
+ */
+class ExtensionDescription
+{
+public:
+    /**throws an exception if the description.xml is not
+        available, cannot be read, does not contain the expected data,
+        or any other error occurred. Therefore it should only be used with
+        new extensions.
+
+        Throws css::uno::RuntimeException,
+        css::deployment::DeploymentException,
+        dp_registry::backend::bundle::NoDescriptionException.
+     */
+    ExtensionDescription(
+        const css::uno::Reference<css::uno::XComponentContext>& xContext,
+        std::u16string_view installDir,
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv);
+
+    const css::uno::Reference<css::xml::dom::XNode>& getRootElement() const
+    {
+        return m_xRoot;
+    }
+
+private:
+    css::uno::Reference<css::xml::dom::XNode> m_xRoot;
+};
+
+class NoDescriptionException
+{
+};
+
+class FileDoesNotExistFilter
+    : public ::cppu::WeakImplHelper< css::ucb::XCommandEnvironment,
+                                      css::task::XInteractionHandler >
+
+{
+    bool m_bExist;
+    css::uno::Reference< css::ucb::XCommandEnvironment > m_xCommandEnv;
+
+public:
+    explicit FileDoesNotExistFilter(
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv);
+
+    bool exist() { return m_bExist;}
+    // XCommandEnvironment
+    virtual css::uno::Reference<css::task::XInteractionHandler > SAL_CALL
+    getInteractionHandler() override;
+    virtual css::uno::Reference<css::ucb::XProgressHandler >
+    SAL_CALL getProgressHandler() override;
+
+    // XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+};
+
+ExtensionDescription::ExtensionDescription(
+    const Reference<css::uno::XComponentContext>& xContext,
+    std::u16string_view installDir,
+    const Reference< css::ucb::XCommandEnvironment >& xCmdEnv)
+{
+    try {
+        //may throw css::ucb::ContentCreationException
+        //If there is no description.xml then ucb will start an interaction which
+        //brings up a dialog.We want to prevent this. Therefore we wrap the xCmdEnv
+        //and filter the respective exception out.
+        OUString sDescriptionUri(OUString::Concat(installDir) + "/description.xml");
+        Reference<css::ucb::XCommandEnvironment> xFilter = new FileDoesNotExistFilter(xCmdEnv);
+        ::ucbhelper::Content descContent(sDescriptionUri, xFilter, xContext);
+
+        //throws a css::uno::Exception if the file is not available
+        Reference<css::io::XInputStream> xIn;
+        try
+        {   //throws com.sun.star.ucb.InteractiveIOException
+            xIn = descContent.openStream();
+        }
+        catch ( const css::uno::Exception& )
+        {
+            if ( ! static_cast<FileDoesNotExistFilter*>(xFilter.get())->exist())
+                throw NoDescriptionException();
+            throw;
+        }
+        if (!xIn.is())
+        {
+            throw css::uno::Exception(
+                "Could not get XInputStream for description.xml of extension " +
+                sDescriptionUri, nullptr);
+        }
+
+        //get root node of description.xml
+        Reference<css::xml::dom::XDocumentBuilder> xDocBuilder(
+            css::xml::dom::DocumentBuilder::create(xContext) );
+
+        if (!xDocBuilder->isNamespaceAware())
+        {
+            throw css::uno::Exception(
+                "Service com.sun.star.xml.dom.DocumentBuilder is not namespace aware.", nullptr);
+        }
+
+        Reference<css::xml::dom::XDocument> xDoc = xDocBuilder->parse(xIn);
+        if (!xDoc.is())
+        {
+            throw css::uno::Exception(sDescriptionUri + " contains data which cannot be parsed. ", nullptr);
+        }
+
+        //check for proper root element and namespace
+        Reference<css::xml::dom::XElement> xRoot = xDoc->getDocumentElement();
+        if (!xRoot.is())
+        {
+            throw css::uno::Exception(
+                sDescriptionUri + " contains no root element.", nullptr);
+        }
+
+        if ( xRoot->getTagName() != "description")
+        {
+            throw css::uno::Exception(
+                sDescriptionUri + " does not contain the root element <description>.", nullptr);
+        }
+
+        m_xRoot.set(xRoot, css::uno::UNO_QUERY_THROW);
+        OUString nsDescription = xRoot->getNamespaceURI();
+
+        //check if this namespace is supported
+        if ( nsDescription != "http://openoffice.org/extensions/description/2006")
+        {
+            throw css::uno::Exception(sDescriptionUri + " contains a root element with an unsupported namespace. ", nullptr);
+        }
+    } catch (const css::uno::RuntimeException &) {
+        throw;
+    } catch (const css::deployment::DeploymentException &) {
+        throw;
+    } catch (const css::uno::Exception & e) {
+        css::uno::Any a(cppu::getCaughtException());
+        throw css::deployment::DeploymentException(
+            e.Message, Reference< css::uno::XInterface >(), a);
+    }
+}
+
+FileDoesNotExistFilter::FileDoesNotExistFilter(
+    const Reference< css::ucb::XCommandEnvironment >& xCmdEnv):
+    m_bExist(true), m_xCommandEnv(xCmdEnv)
+{}
+
+    // XCommandEnvironment
+Reference<css::task::XInteractionHandler >
+    FileDoesNotExistFilter::getInteractionHandler()
+{
+    return static_cast<css::task::XInteractionHandler*>(this);
+}
+
+Reference<css::ucb::XProgressHandler >
+    FileDoesNotExistFilter::getProgressHandler()
+{
+    return m_xCommandEnv.is()
+        ? m_xCommandEnv->getProgressHandler()
+        : Reference<css::ucb::XProgressHandler>();
+}
+
+// XInteractionHandler
+//If the interaction was caused by a non-existing file which is specified in the ctor
+//of FileDoesNotExistFilter, then we do nothing
+void  FileDoesNotExistFilter::handle(
+        Reference<css::task::XInteractionRequest > const & xRequest )
+{
+    css::uno::Any request( xRequest->getRequest() );
+
+    css::ucb::InteractiveIOException ioexc;
+    if ((request>>= ioexc)
+        && (ioexc.Code == css::ucb::IOErrorCode_NOT_EXISTING
+            || ioexc.Code == css::ucb::IOErrorCode_NOT_EXISTING_PATH))
+    {
+        m_bExist = false;
+        return;
+    }
+    Reference<css::task::XInteractionHandler> xInteraction;
+    if (m_xCommandEnv.is()) {
+        xInteraction = m_xCommandEnv->getInteractionHandler();
+    }
+    if (xInteraction.is()) {
+        xInteraction->handle(xRequest);
+    }
+}
+
+}
+
+namespace dp_misc {
+
+DescriptionInfoset getDescriptionInfoset(std::u16string_view sExtensionFolderURL)
+{
+    Reference< css::xml::dom::XNode > root;
+    Reference<css::uno::XComponentContext> context(
+        comphelper::getProcessComponentContext());
+    try {
+        root =
+            ExtensionDescription(
+                context, sExtensionFolderURL,
+                Reference< css::ucb::XCommandEnvironment >()).
+            getRootElement();
+    } catch (const NoDescriptionException &) {
+    } catch (const css::deployment::DeploymentException & e) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw css::lang::WrappedTargetRuntimeException(
+            "com.sun.star.deployment.DeploymentException: " + e.Message,
+            nullptr, anyEx );
+    }
+    return DescriptionInfoset(context, root);
+}
+
+DescriptionInfoset::DescriptionInfoset(
+    css::uno::Reference< css::uno::XComponentContext > const & context,
+    css::uno::Reference< css::xml::dom::XNode > const & element):
+    m_context(context),
+    m_element(element)
+{
+    if (m_element.is()) {
+        m_xpath = css::xml::xpath::XPathAPI::create(context);
+        m_xpath->registerNS("desc", element->getNamespaceURI());
+        m_xpath->registerNS("xlink", "http://www.w3.org/1999/xlink");
+    }
+}
+
+DescriptionInfoset::~DescriptionInfoset() {}
+
+::std::optional< OUString > DescriptionInfoset::getIdentifier() const {
+    return getOptionalValue("desc:identifier/@value");
+}
+
+OUString DescriptionInfoset::getNodeValueFromExpression(OUString const & expression) const
+{
+    css::uno::Reference< css::xml::dom::XNode > n;
+    if (m_element.is()) {
+        try {
+            n = m_xpath->selectSingleNode(m_element, expression);
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+    }
+    return n.is() ? getNodeValue(n) : OUString();
+}
+
+void DescriptionInfoset::checkDenylist() const
+{
+    if (!m_element.is())
+        return;
+
+    std::optional< OUString > id(getIdentifier());
+    if (!id)
+        return; // nothing to check
+    OUString currentversion(getVersion());
+    if (currentversion.getLength() == 0)
+        return;  // nothing to check
+
+    css::uno::Sequence<css::uno::Any> args(comphelper::InitAnyPropertySequence(
+    {
+        {"nodepath", css::uno::Any(OUString("/org.openoffice.Office.ExtensionDependencies/Extensions"))}
+    }));
+    css::uno::Reference< css::container::XNameAccess > denylist(
+        (css::configuration::theDefaultProvider::get(m_context)
+         ->createInstanceWithArguments(
+             "com.sun.star.configuration.ConfigurationAccess", args)),
+        css::uno::UNO_QUERY_THROW);
+
+    // check first if a denylist entry is available
+    if (!(denylist.is() && denylist->hasByName(*id)))        return;
+
+    css::uno::Reference< css::beans::XPropertySet > extProps(
+        denylist->getByName(*id), css::uno::UNO_QUERY_THROW);
+
+    css::uno::Any anyValue = extProps->getPropertyValue("Versions");
+
+    css::uno::Sequence< OUString > blversions;
+    anyValue >>= blversions;
+
+    // check if the current version requires further dependency checks from the denylist
+    if (!checkDenylistVersion(currentversion, blversions))        return;
+
+    anyValue = extProps->getPropertyValue("Dependencies");
+    OUString udeps;
+    anyValue >>= udeps;
+
+    if (udeps.getLength() == 0)
+        return; // nothing todo
+
+    OString xmlDependencies = OUStringToOString(udeps, RTL_TEXTENCODING_UNICODE);
+
+    css::uno::Reference< css::xml::dom::XDocumentBuilder> docbuilder(
+        m_context->getServiceManager()->createInstanceWithContext("com.sun.star.xml.dom.DocumentBuilder", m_context),
+        css::uno::UNO_QUERY_THROW);
+
+    css::uno::Sequence< sal_Int8 > byteSeq(reinterpret_cast<const sal_Int8*>(xmlDependencies.getStr()), xmlDependencies.getLength());
+
+    css::uno::Reference< css::io::XInputStream> inputstream( css::io::SequenceInputStream::createStreamFromSequence(m_context, byteSeq),
+                                                             css::uno::UNO_QUERY_THROW);
+
+    css::uno::Reference< css::xml::dom::XDocument > xDocument(docbuilder->parse(inputstream));
+    css::uno::Reference< css::xml::dom::XElement > xElement(xDocument->getDocumentElement());
+    css::uno::Reference< css::xml::dom::XNodeList > xDeps(xElement->getChildNodes());
+    sal_Int32 nLen = xDeps->getLength();
+
+    // get the parent xml document  of current description info for the import
+    css::uno::Reference< css::xml::dom::XDocument > xCurrentDescInfo(m_element->getOwnerDocument());
+
+    // get dependency node of current description info to merge the new dependencies from the denylist
+    css::uno::Reference< css::xml::dom::XNode > xCurrentDeps(
+        m_xpath->selectSingleNode(m_element, "desc:dependencies"));
+
+    // if no dependency node exists, create a new one in the current description info
+    if (!xCurrentDeps.is()) {
+        css::uno::Reference< css::xml::dom::XNode > xNewDepNode(
+            xCurrentDescInfo->createElementNS(
+                "http://openoffice.org/extensions/description/2006",
+                "dependencies"), css::uno::UNO_QUERY_THROW);
+        m_element->appendChild(xNewDepNode);
+        xCurrentDeps = m_xpath->selectSingleNode(m_element, "desc:dependencies");
+    }
+
+    for (sal_Int32 i=0; i<nLen; i++) {
+        css::uno::Reference< css::xml::dom::XNode > xNode(xDeps->item(i));
+        css::uno::Reference< css::xml::dom::XElement > xDep(xNode, css::uno::UNO_QUERY);
+        if (xDep.is()) {
+            // found valid denylist dependency, import the node first and append it to the existing dependency node
+            css::uno::Reference< css::xml::dom::XNode > importedNode = xCurrentDescInfo->importNode(xNode, true);
+            xCurrentDeps->appendChild(importedNode);
+        }
+    }
+}
+
+bool DescriptionInfoset::checkDenylistVersion(
+    std::u16string_view currentversion,
+    css::uno::Sequence< OUString > const & versions)
+{
+    sal_Int32 nLen = versions.getLength();
+    for (sal_Int32 i=0; i<nLen; i++) {
+        if (currentversion == versions[i])
+            return true;
+    }
+
+    return false;
+}
+
+OUString DescriptionInfoset::getVersion() const
+{
+    return getNodeValueFromExpression( "desc:version/@value" );
+}
+
+css::uno::Sequence< OUString > DescriptionInfoset::getSupportedPlatforms() const
+{
+    //When there is no description.xml then we assume that we support all platforms
+    if (! m_element.is())
+    {
+        return { OUString("all") };
+    }
+
+    //Check if the <platform> element was provided. If not the default is "all" platforms
+    css::uno::Reference< css::xml::dom::XNode > nodePlatform(
+        m_xpath->selectSingleNode(m_element, "desc:platform"));
+    if (!nodePlatform.is())
+    {
+        return { OUString("all") };
+    }
+
+    //There is a platform element.
+    const OUString value = getNodeValueFromExpression("desc:platform/@value");
+    //parse the string, it can contained multiple strings separated by commas
+    std::vector< OUString> vec;
+    sal_Int32 nIndex = 0;
+    do
+    {
+        const OUString aToken( o3tl::trim(o3tl::getToken(value, 0, ',', nIndex )) );
+        if (!aToken.isEmpty())
+            vec.push_back(aToken);
+
+    }
+    while (nIndex >= 0);
+
+    return comphelper::containerToSequence(vec);
+}
+
+css::uno::Reference< css::xml::dom::XNodeList >
+DescriptionInfoset::getDependencies() const {
+    if (m_element.is()) {
+        try {
+            // check the extension denylist first and expand the dependencies if applicable
+            checkDenylist();
+
+            return m_xpath->selectNodeList(m_element, "desc:dependencies/*");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+    }
+    return new EmptyNodeList;
+}
+
+css::uno::Sequence< OUString >
+DescriptionInfoset::getUpdateInformationUrls() const {
+    return getUrls("desc:update-information/desc:src/@xlink:href");
+}
+
+css::uno::Sequence< OUString >
+DescriptionInfoset::getUpdateDownloadUrls() const
+{
+    return getUrls("desc:update-download/desc:src/@xlink:href");
+}
+
+OUString DescriptionInfoset::getIconURL( bool bHighContrast ) const
+{
+    css::uno::Sequence< OUString > aStrList = getUrls( "desc:icon/desc:default/@xlink:href" );
+    css::uno::Sequence< OUString > aStrListHC = getUrls( "desc:icon/desc:high-contrast/@xlink:href" );
+
+    if ( bHighContrast && aStrListHC.hasElements() && !aStrListHC[0].isEmpty() )
+        return aStrListHC[0];
+
+    if ( aStrList.hasElements() && !aStrList[0].isEmpty() )
+        return aStrList[0];
+
+    return OUString();
+}
+
+::std::optional< OUString > DescriptionInfoset::getLocalizedUpdateWebsiteURL()
+    const
+{
+    bool bParentExists = false;
+    const OUString sURL (getLocalizedHREFAttrFromChild("/desc:description/desc:update-website", &bParentExists ));
+
+    if (!sURL.isEmpty())
+        return ::std::optional< OUString >(sURL);
+    else
+        return bParentExists ? ::std::optional< OUString >(OUString()) :
+            ::std::optional< OUString >();
+}
+
+::std::optional< OUString > DescriptionInfoset::getOptionalValue(
+    OUString const & expression) const
+{
+    css::uno::Reference< css::xml::dom::XNode > n;
+    if (m_element.is()) {
+        try {
+            n = m_xpath->selectSingleNode(m_element, expression);
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+    }
+    return n.is()
+        ? ::std::optional< OUString >(getNodeValue(n))
+        : ::std::optional< OUString >();
+}
+
+css::uno::Sequence< OUString > DescriptionInfoset::getUrls(
+    OUString const & expression) const
+{
+    css::uno::Reference< css::xml::dom::XNodeList > ns;
+    if (m_element.is()) {
+        try {
+            ns = m_xpath->selectNodeList(m_element, expression);
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+    }
+    css::uno::Sequence< OUString > urls(ns.is() ? ns->getLength() : 0);
+    auto urlsRange = asNonConstRange(urls);
+    for (::sal_Int32 i = 0; i < urls.getLength(); ++i) {
+        urlsRange[i] = getNodeValue(ns->item(i));
+    }
+    return urls;
+}
+
+std::pair< OUString, OUString > DescriptionInfoset::getLocalizedPublisherNameAndURL() const
+{
+    css::uno::Reference< css::xml::dom::XNode > node =
+        getLocalizedChild("desc:publisher");
+
+    OUString sPublisherName;
+    OUString sURL;
+    if (node.is())
+    {
+        css::uno::Reference< css::xml::dom::XNode > xPathName;
+        try {
+            xPathName = m_xpath->selectSingleNode(node, "text()");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        OSL_ASSERT(xPathName.is());
+        if (xPathName.is())
+            sPublisherName = xPathName->getNodeValue();
+
+        css::uno::Reference< css::xml::dom::XNode > xURL;
+        try {
+            xURL = m_xpath->selectSingleNode(node, "@xlink:href");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        OSL_ASSERT(xURL.is());
+        if (xURL.is())
+           sURL = xURL->getNodeValue();
+    }
+    return std::make_pair(sPublisherName, sURL);
+}
+
+OUString DescriptionInfoset::getLocalizedReleaseNotesURL() const
+{
+    return getLocalizedHREFAttrFromChild("/desc:description/desc:release-notes", nullptr);
+}
+
+OUString DescriptionInfoset::getLocalizedDisplayName() const
+{
+    css::uno::Reference< css::xml::dom::XNode > node =
+        getLocalizedChild("desc:display-name");
+    if (node.is())
+    {
+        css::uno::Reference< css::xml::dom::XNode > xtext;
+        try {
+            xtext = m_xpath->selectSingleNode(node, "text()");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        if (xtext.is())
+            return xtext->getNodeValue();
+    }
+    return OUString();
+}
+
+OUString DescriptionInfoset::getLocalizedLicenseURL() const
+{
+    return getLocalizedHREFAttrFromChild("/desc:description/desc:registration/desc:simple-license", nullptr);
+
+}
+
+::std::optional<SimpleLicenseAttributes>
+DescriptionInfoset::getSimpleLicenseAttributes() const
+{
+    //Check if the node exist
+    css::uno::Reference< css::xml::dom::XNode > n;
+    if (m_element.is()) {
+        try {
+            n = m_xpath->selectSingleNode(m_element, "/desc:description/desc:registration/desc:simple-license/@accept-by");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        if (n.is())
+        {
+            SimpleLicenseAttributes attributes;
+            attributes.acceptBy =
+                getNodeValueFromExpression("/desc:description/desc:registration/desc:simple-license/@accept-by");
+
+            ::std::optional< OUString > suppressOnUpdate = getOptionalValue("/desc:description/desc:registration/desc:simple-license/@suppress-on-update");
+            if (suppressOnUpdate)
+                attributes.suppressOnUpdate = o3tl::equalsIgnoreAsciiCase(o3tl::trim(*suppressOnUpdate), u"true");
+            else
+                attributes.suppressOnUpdate = false;
+
+            ::std::optional< OUString > suppressIfRequired = getOptionalValue("/desc:description/desc:registration/desc:simple-license/@suppress-if-required");
+            if (suppressIfRequired)
+                attributes.suppressIfRequired = o3tl::equalsIgnoreAsciiCase(o3tl::trim(*suppressIfRequired), u"true");
+            else
+                attributes.suppressIfRequired = false;
+
+            return ::std::optional<SimpleLicenseAttributes>(attributes);
+        }
+    }
+    return ::std::optional<SimpleLicenseAttributes>();
+}
+
+OUString DescriptionInfoset::getLocalizedDescriptionURL() const
+{
+    return getLocalizedHREFAttrFromChild("/desc:description/desc:extension-description", nullptr);
+}
+
+css::uno::Reference< css::xml::dom::XNode >
+DescriptionInfoset::getLocalizedChild( const OUString & sParent) const
+{
+    if ( ! m_element.is() || sParent.isEmpty())
+        return css::uno::Reference< css::xml::dom::XNode > ();
+
+    css::uno::Reference< css::xml::dom::XNode > xParent;
+    try {
+        xParent = m_xpath->selectSingleNode(m_element, sParent);
+    } catch (const css::xml::xpath::XPathException &) {
+        // ignore
+    }
+    css::uno::Reference<css::xml::dom::XNode> nodeMatch;
+    if (xParent.is())
+    {
+        nodeMatch = matchLanguageTag(xParent, getOfficeLanguageTag().getBcp47());
+
+        //office: en-DE, en, en-DE-altmark
+        if (! nodeMatch.is())
+        {
+            // Already tried full tag, continue with first fallback.
+            const std::vector< OUString > aFallbacks( getOfficeLanguageTag().getFallbackStrings( false));
+            for (auto const& fallback : aFallbacks)
+            {
+                nodeMatch = matchLanguageTag(xParent, fallback);
+                if (nodeMatch.is())
+                    break;
+            }
+            if (! nodeMatch.is())
+                nodeMatch = getChildWithDefaultLocale(xParent);
+        }
+    }
+
+    return nodeMatch;
+}
+
+css::uno::Reference<css::xml::dom::XNode>
+DescriptionInfoset::matchLanguageTag(
+    css::uno::Reference< css::xml::dom::XNode > const & xParent, std::u16string_view rTag) const
+{
+    OSL_ASSERT(xParent.is());
+    css::uno::Reference<css::xml::dom::XNode> nodeMatch;
+
+    //first try exact match for lang
+    const OUString exp1(OUString::Concat("*[@lang=\"") + rTag + "\"]");
+    try {
+        nodeMatch = m_xpath->selectSingleNode(xParent, exp1);
+    } catch (const css::xml::xpath::XPathException &) {
+        // ignore
+    }
+
+    //try to match in strings that also have a country and/or variant, for
+    //example en  matches in en-US-montana, en-US, en-montana
+    if (!nodeMatch.is())
+    {
+        const OUString exp2(
+            OUString::Concat("*[starts-with(@lang,\"") + rTag + "-\")]");
+        try {
+            nodeMatch = m_xpath->selectSingleNode(xParent, exp2);
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+    }
+    return nodeMatch;
+}
+
+css::uno::Reference<css::xml::dom::XNode>
+DescriptionInfoset::getChildWithDefaultLocale(css::uno::Reference< css::xml::dom::XNode >
+                                    const & xParent) const
+{
+    OSL_ASSERT(xParent.is());
+    if ( xParent->getNodeName() == "simple-license" )
+    {
+        css::uno::Reference<css::xml::dom::XNode> nodeDefault;
+        try {
+            nodeDefault = m_xpath->selectSingleNode(xParent, "@default-license-id");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        if (nodeDefault.is())
+        {
+            //The old way
+            const OUString exp1("desc:license-text[@license-id = \""
+                + nodeDefault->getNodeValue()
+                + "\"]");
+            try {
+                return m_xpath->selectSingleNode(xParent, exp1);
+            } catch (const css::xml::xpath::XPathException &) {
+                // ignore
+            }
+        }
+    }
+
+    try {
+        return m_xpath->selectSingleNode(xParent, "*[1]");
+    } catch (const css::xml::xpath::XPathException &) {
+        // ignore
+        return nullptr;
+    }
+}
+
+OUString DescriptionInfoset::getLocalizedHREFAttrFromChild(
+    OUString const & sXPathParent, bool * out_bParentExists)
+    const
+{
+    css::uno::Reference< css::xml::dom::XNode > node =
+        getLocalizedChild(sXPathParent);
+
+    OUString sURL;
+    if (node.is())
+    {
+        if (out_bParentExists)
+            *out_bParentExists = true;
+        css::uno::Reference< css::xml::dom::XNode > xURL;
+        try {
+            xURL = m_xpath->selectSingleNode(node, "@xlink:href");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        OSL_ASSERT(xURL.is());
+        if (xURL.is())
+            sURL = xURL->getNodeValue();
+    }
+    else
+    {
+        if (out_bParentExists)
+            *out_bParentExists = false;
+    }
+    return sURL;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_identifier.cxx b/desktop/source/deployment/misc/dp_identifier.cxx
new file mode 100644
index 000000000..8669710c7
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_identifier.cxx
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <sal/config.h>
+
+#include <optional>
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <osl/diagnose.h>
+#include <rtl/ustring.hxx>
+
+#include <dp_identifier.hxx>
+
+namespace dp_misc {
+
+OUString generateIdentifier(
+    ::std::optional< OUString > const & optional,
+    std::u16string_view fileName)
+{
+    return optional ? *optional : generateLegacyIdentifier(fileName);
+}
+
+OUString getIdentifier(
+    css::uno::Reference< css::deployment::XPackage > const & package)
+{
+    OSL_ASSERT(package.is());
+    css::beans::Optional< OUString > id(package->getIdentifier());
+    return id.IsPresent
+        ? id.Value : generateLegacyIdentifier(package->getName());
+}
+
+OUString generateLegacyIdentifier(std::u16string_view fileName) {
+    return OUString::Concat("org.openoffice.legacy.") + fileName;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_interact.cxx b/desktop/source/deployment/misc/dp_interact.cxx
new file mode 100644
index 000000000..ae928a28e
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_interact.cxx
@@ -0,0 +1,137 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <dp_interact.h>
+
+#include <comphelper/interaction.hxx>
+
+#include <com/sun/star/task/XInteractionAbort.hpp>
+#include <osl/diagnose.h>
+
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_misc {
+namespace {
+
+
+class InteractionContinuationImpl : public ::cppu::OWeakObject,
+                                    public task::XInteractionContinuation
+{
+    const Type m_type;
+    bool * m_pselect;
+
+public:
+    InteractionContinuationImpl( Type const & type, bool * pselect )
+        : m_type( type ),
+          m_pselect( pselect )
+        { OSL_ASSERT(
+            cppu::UnoType<task::XInteractionContinuation>::get().isAssignableFrom(m_type) ); }
+
+    // XInterface
+    virtual void SAL_CALL acquire() noexcept override;
+    virtual void SAL_CALL release() noexcept override;
+    virtual Any SAL_CALL queryInterface( Type const & type ) override;
+
+    // XInteractionContinuation
+    virtual void SAL_CALL select() override;
+};
+
+// XInterface
+
+void InteractionContinuationImpl::acquire() noexcept
+{
+    OWeakObject::acquire();
+}
+
+
+void InteractionContinuationImpl::release() noexcept
+{
+    OWeakObject::release();
+}
+
+
+Any InteractionContinuationImpl::queryInterface( Type const & type )
+{
+    if (type.isAssignableFrom( m_type )) {
+        Reference<task::XInteractionContinuation> xThis(this);
+        return Any( &xThis, type );
+    }
+    else
+        return OWeakObject::queryInterface(type);
+}
+
+// XInteractionContinuation
+
+void InteractionContinuationImpl::select()
+{
+    *m_pselect = true;
+}
+
+} // anon namespace
+
+
+bool interactContinuation( Any const & request,
+                           Type const & continuation,
+                           Reference<XCommandEnvironment> const & xCmdEnv,
+                           bool * pcont, bool * pabort )
+{
+    OSL_ASSERT(
+        cppu::UnoType<task::XInteractionContinuation>::get().isAssignableFrom(
+            continuation ) );
+    if (!xCmdEnv)
+        return false;
+
+    Reference<task::XInteractionHandler> xInteractionHandler(
+        xCmdEnv->getInteractionHandler() );
+    if (!xInteractionHandler)
+        return false;
+
+    bool cont = false;
+    bool abort = false;
+    std::vector< Reference<task::XInteractionContinuation> > conts {
+        new InteractionContinuationImpl(continuation, &cont ),
+        new InteractionContinuationImpl( cppu::UnoType<task::XInteractionAbort>::get(), &abort ) };
+    xInteractionHandler->handle(
+        new ::comphelper::OInteractionRequest( request, std::move(conts) ) );
+    if (cont || abort) {
+        if (pcont != nullptr)
+            *pcont = cont;
+        if (pabort != nullptr)
+            *pabort = abort;
+        return true;
+    }
+    return false;
+}
+
+// XAbortChannel
+
+void AbortChannel::sendAbort()
+{
+    m_aborted = true;
+    if (m_xNext.is())
+        m_xNext->sendAbort();
+}
+
+} // dp_misc
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_misc.cxx b/desktop/source/deployment/misc/dp_misc.cxx
new file mode 100644
index 000000000..f4437711d
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_misc.cxx
@@ -0,0 +1,561 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_folders.h>
+#include <config_features.h>
+#include <chrono>
+
+#include <dp_misc.h>
+#include <dp_interact.h>
+#include <dp_shared.hxx>
+#include <rtl/uri.hxx>
+#include <rtl/digest.h>
+#include <rtl/random.h>
+#include <rtl/bootstrap.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <sal/log.hxx>
+#include <unotools/bootstrap.hxx>
+#include <osl/file.hxx>
+#include <osl/pipe.hxx>
+#include <osl/security.hxx>
+#include <osl/thread.hxx>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/bridge/BridgeFactory.hpp>
+#include <com/sun/star/bridge/UnoUrlResolver.hpp>
+#include <com/sun/star/bridge/XUnoUrlResolver.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/task/OfficeRestartManager.hpp>
+#include <memory>
+#include <string_view>
+#include <comphelper/lok.hxx>
+#include <comphelper/processfactory.hxx>
+#include <salhelper/linkhelper.hxx>
+
+#ifdef _WIN32
+#include <prewin.h>
+#include <postwin.h>
+#endif
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_misc {
+namespace {
+
+struct UnoRc : public rtl::StaticWithInit<
+    std::shared_ptr<rtl::Bootstrap>, UnoRc> {
+    std::shared_ptr<rtl::Bootstrap> operator () () {
+        OUString unorc( "$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("louno") );
+        ::rtl::Bootstrap::expandMacros( unorc );
+        auto ret = std::make_shared<::rtl::Bootstrap>( unorc );
+        OSL_ASSERT( ret->getHandle() != nullptr );
+        return ret;
+    }
+};
+
+OUString generateOfficePipeId()
+{
+    OUString userPath;
+    ::utl::Bootstrap::PathStatus aLocateResult =
+    ::utl::Bootstrap::locateUserInstallation( userPath );
+    if (aLocateResult != ::utl::Bootstrap::PATH_EXISTS &&
+        aLocateResult != ::utl::Bootstrap::PATH_VALID)
+    {
+        throw Exception("Extension Manager: Could not obtain path for UserInstallation.", nullptr);
+    }
+
+    rtlDigest digest = rtl_digest_create( rtl_Digest_AlgorithmMD5 );
+    if (!digest) {
+        throw RuntimeException("cannot get digest rtl_Digest_AlgorithmMD5!", nullptr );
+    }
+
+    sal_uInt8 const * data =
+        reinterpret_cast<sal_uInt8 const *>(userPath.getStr());
+    std::size_t size = userPath.getLength() * sizeof (sal_Unicode);
+    sal_uInt32 md5_key_len = rtl_digest_queryLength( digest );
+    std::unique_ptr<sal_uInt8[]> md5_buf( new sal_uInt8 [ md5_key_len ] );
+
+    rtl_digest_init( digest, data, static_cast<sal_uInt32>(size) );
+    rtl_digest_update( digest, data, static_cast<sal_uInt32>(size) );
+    rtl_digest_get( digest, md5_buf.get(), md5_key_len );
+    rtl_digest_destroy( digest );
+
+    // create hex-value string from the MD5 value to keep
+    // the string size minimal
+    OUStringBuffer buf;
+    buf.append( "SingleOfficeIPC_" );
+    for ( sal_uInt32 i = 0; i < md5_key_len; ++i ) {
+        buf.append( static_cast<sal_Int32>(md5_buf[ i ]), 0x10 );
+    }
+    return buf.makeStringAndClear();
+}
+
+bool existsOfficePipe()
+{
+    static OUString OfficePipeId = generateOfficePipeId();
+
+    OUString const & pipeId = OfficePipeId;
+    if (pipeId.isEmpty())
+        return false;
+    ::osl::Security sec;
+    ::osl::Pipe pipe( pipeId, osl_Pipe_OPEN, sec );
+    return pipe.is();
+}
+
+//get modification time
+bool getModifyTimeTargetFile(const OUString &rFileURL, TimeValue &rTime)
+{
+    salhelper::LinkResolver aResolver(osl_FileStatus_Mask_ModifyTime);
+
+    if (aResolver.fetchFileStatus(rFileURL) != osl::FileBase::E_None)
+        return false;
+
+    rTime = aResolver.m_aStatus.getModifyTime();
+
+    return true;
+}
+
+//Returns true if the Folder was more recently modified then
+//the lastsynchronized file. That is the repository needs to
+//be synchronized.
+bool compareExtensionFolderWithLastSynchronizedFile(
+    OUString const & folderURL, OUString const & fileURL)
+{
+    bool bNeedsSync = false;
+    ::osl::DirectoryItem itemExtFolder;
+    ::osl::File::RC err1 =
+          ::osl::DirectoryItem::get(folderURL, itemExtFolder);
+    //If it does not exist, then there is nothing to be done
+    if (err1 == ::osl::File::E_NOENT)
+    {
+        return false;
+    }
+    else if (err1 != ::osl::File::E_None)
+    {
+        OSL_FAIL("Cannot access extension folder");
+        return true; //sync just in case
+    }
+
+    //If last synchronized does not exist, then OOo is started for the first time
+    ::osl::DirectoryItem itemFile;
+    ::osl::File::RC err2 = ::osl::DirectoryItem::get(fileURL, itemFile);
+    if (err2 == ::osl::File::E_NOENT)
+    {
+        return true;
+
+    }
+    else if (err2 != ::osl::File::E_None)
+    {
+        OSL_FAIL("Cannot access file lastsynchronized");
+        return true; //sync just in case
+    }
+
+    //compare the modification time of the extension folder and the last
+    //modified file
+    TimeValue timeFolder;
+    if (getModifyTimeTargetFile(folderURL, timeFolder))
+    {
+        TimeValue timeFile;
+        if (getModifyTimeTargetFile(fileURL, timeFile))
+        {
+            if (timeFile.Seconds < timeFolder.Seconds)
+                bNeedsSync = true;
+        }
+        else
+        {
+            OSL_ASSERT(false);
+            bNeedsSync = true;
+        }
+    }
+    else
+    {
+        OSL_ASSERT(false);
+        bNeedsSync = true;
+    }
+
+    return bNeedsSync;
+}
+
+bool needToSyncRepository(std::u16string_view name)
+{
+    OUString folder;
+    OUString file;
+    if ( name == u"bundled" )
+    {
+        folder = "$BUNDLED_EXTENSIONS";
+        file = "$BUNDLED_EXTENSIONS_USER/lastsynchronized";
+    }
+    else if ( name == u"shared" )
+    {
+        folder = "$UNO_SHARED_PACKAGES_CACHE/uno_packages";
+        file = "$SHARED_EXTENSIONS_USER/lastsynchronized";
+    }
+    else
+    {
+        OSL_ASSERT(false);
+        return true;
+    }
+    ::rtl::Bootstrap::expandMacros(folder);
+    ::rtl::Bootstrap::expandMacros(file);
+    return compareExtensionFolderWithLastSynchronizedFile(
+        folder, file);
+}
+
+
+} // anon namespace
+
+
+namespace {
+OUString encodeForRcFile( OUString const & str )
+{
+    // escape $\{} (=> rtl bootstrap files)
+    OUStringBuffer buf(64);
+    sal_Int32 pos = 0;
+    const sal_Int32 len = str.getLength();
+    for ( ; pos < len; ++pos ) {
+        sal_Unicode c = str[ pos ];
+        switch (c) {
+        case '$':
+        case '\\':
+        case '{':
+        case '}':
+            buf.append( '\\' );
+            break;
+        }
+        buf.append( c );
+    }
+    return buf.makeStringAndClear();
+}
+}
+
+
+OUString makeURL( OUString const & baseURL, OUString const & relPath_ )
+{
+    OUStringBuffer buf(128);
+    if (baseURL.getLength() > 1 && baseURL[ baseURL.getLength() - 1 ] == '/')
+        buf.append( baseURL.subView(0, baseURL.getLength() - 1) );
+    else
+        buf.append( baseURL );
+    OUString relPath(relPath_);
+    if( relPath.startsWith("/") )
+        relPath = relPath.copy( 1 );
+    if (!relPath.isEmpty())
+    {
+        buf.append( '/' );
+        if (baseURL.match( "vnd.sun.star.expand:" )) {
+            // encode for macro expansion: relPath is supposed to have no
+            // macros, so encode $, {} \ (bootstrap mimic)
+            relPath = encodeForRcFile(relPath);
+
+            // encode once more for vnd.sun.star.expand schema:
+            // vnd.sun.star.expand:$UNO_...
+            // will expand to file-url
+            relPath = ::rtl::Uri::encode( relPath, rtl_UriCharClassUric,
+                                          rtl_UriEncodeIgnoreEscapes,
+                                          RTL_TEXTENCODING_UTF8 );
+        }
+        buf.append( relPath );
+    }
+    return buf.makeStringAndClear();
+}
+
+OUString makeURLAppendSysPathSegment( OUString const & baseURL, OUString const & segment )
+{
+    OSL_ASSERT(segment.indexOf(u'/') == -1);
+
+    ::rtl::Uri::encode(
+        segment, rtl_UriCharClassPchar, rtl_UriEncodeIgnoreEscapes,
+        RTL_TEXTENCODING_UTF8);
+    return makeURL(baseURL, segment);
+}
+
+
+OUString expandUnoRcTerm( OUString const & term_ )
+{
+    OUString term(term_);
+    UnoRc::get()->expandMacrosFrom( term );
+    return term;
+}
+
+OUString makeRcTerm( OUString const & url )
+{
+    OSL_ASSERT( url.match( "vnd.sun.star.expand:" ));
+    if (url.match( "vnd.sun.star.expand:" )) {
+        // cut protocol:
+        OUString rcterm( url.copy( sizeof ("vnd.sun.star.expand:") - 1 ) );
+        // decode uric class chars:
+        rcterm = ::rtl::Uri::decode(
+            rcterm, rtl_UriDecodeWithCharset, RTL_TEXTENCODING_UTF8 );
+        return rcterm;
+    }
+    else
+        return url;
+}
+
+
+OUString expandUnoRcUrl( OUString const & url )
+{
+    if (url.match( "vnd.sun.star.expand:" )) {
+        // cut protocol:
+        OUString rcurl( url.copy( sizeof ("vnd.sun.star.expand:") - 1 ) );
+        // decode uric class chars:
+        rcurl = ::rtl::Uri::decode(
+            rcurl, rtl_UriDecodeWithCharset, RTL_TEXTENCODING_UTF8 );
+        // expand macro string:
+        UnoRc::get()->expandMacrosFrom( rcurl );
+        return rcurl;
+    }
+    else {
+        return url;
+    }
+}
+
+
+bool office_is_running()
+{
+    //We need to check if we run within the office process. Then we must not use the pipe, because
+    //this could cause a deadlock. This is actually a workaround for i82778
+    OUString sFile;
+    oslProcessError err = osl_getExecutableFile(& sFile.pData);
+    bool ret = false;
+    if (osl_Process_E_None == err)
+    {
+        sFile = sFile.copy(sFile.lastIndexOf('/') + 1);
+        if (
+#if defined _WIN32
+            //osl_getExecutableFile should deliver "soffice.bin" on windows
+            //even if swriter.exe, scalc.exe etc. was started. This is a bug
+            //in osl_getExecutableFile
+            sFile == "soffice.bin" || sFile == "soffice.exe" || sFile == "soffice.com"
+            || sFile == "soffice" || sFile == "swriter.exe" || sFile == "swriter"
+            || sFile == "scalc.exe" || sFile == "scalc" || sFile == "simpress.exe"
+            || sFile == "simpress" || sFile == "sdraw.exe" || sFile == "sdraw"
+            || sFile == "sbase.exe" || sFile == "sbase"
+#elif defined MACOSX
+            sFile == "soffice"
+#elif defined UNIX
+            sFile == "soffice.bin"
+#else
+#error "Unsupported platform"
+#endif
+
+            )
+            ret = true;
+        else
+            ret = existsOfficePipe();
+    }
+    else
+    {
+        OSL_FAIL("NOT osl_Process_E_None ");
+        //if osl_getExecutable file then we take the risk of creating a pipe
+        ret =  existsOfficePipe();
+    }
+    return ret;
+}
+
+
+oslProcess raiseProcess(
+    OUString const & appURL, Sequence<OUString> const & args )
+{
+    ::osl::Security sec;
+    oslProcess hProcess = nullptr;
+    oslProcessError rc = osl_executeProcess(
+        appURL.pData,
+        reinterpret_cast<rtl_uString **>(
+            const_cast<OUString *>(args.getConstArray()) ),
+        args.getLength(),
+        osl_Process_DETACHED,
+        sec.getHandle(),
+        nullptr, // => current working dir
+        nullptr, 0, // => no env vars
+        &hProcess );
+
+    switch (rc) {
+    case osl_Process_E_None:
+        break;
+    case osl_Process_E_NotFound:
+        throw RuntimeException( "image not found!", nullptr );
+    case osl_Process_E_TimedOut:
+        throw RuntimeException( "timeout occurred!", nullptr );
+    case osl_Process_E_NoPermission:
+        throw RuntimeException( "permission denied!", nullptr );
+    case osl_Process_E_Unknown:
+        throw RuntimeException( "unknown error!", nullptr );
+    case osl_Process_E_InvalidError:
+    default:
+        throw RuntimeException( "unmapped error!", nullptr );
+    }
+
+    return hProcess;
+}
+
+
+OUString generateRandomPipeId()
+{
+    // compute some good pipe id:
+    static rtlRandomPool s_hPool = rtl_random_createPool();
+    if (s_hPool == nullptr)
+        throw RuntimeException( "cannot create random pool!?", nullptr );
+    sal_uInt8 bytes[ 32 ];
+    if (rtl_random_getBytes(
+            s_hPool, bytes, SAL_N_ELEMENTS(bytes) ) != rtl_Random_E_None) {
+        throw RuntimeException( "random pool error!?", nullptr );
+    }
+    OUStringBuffer buf;
+    for (unsigned char byte : bytes) {
+        buf.append( static_cast<sal_Int32>(byte), 0x10 );
+    }
+    return buf.makeStringAndClear();
+}
+
+
+Reference<XInterface> resolveUnoURL(
+    OUString const & connectString,
+    Reference<XComponentContext> const & xLocalContext,
+    AbortChannel const * abortChannel )
+{
+    Reference<bridge::XUnoUrlResolver> xUnoUrlResolver(
+        bridge::UnoUrlResolver::create( xLocalContext ) );
+
+    for (int i = 0; i <= 40; ++i) // 20 seconds
+    {
+        if (abortChannel != nullptr && abortChannel->isAborted()) {
+            throw ucb::CommandAbortedException( "abort!" );
+        }
+        try {
+            return xUnoUrlResolver->resolve( connectString );
+        }
+        catch (const connection::NoConnectException &) {
+            if (i < 40)
+            {
+                ::osl::Thread::wait( std::chrono::milliseconds(500) );
+            }
+            else throw;
+        }
+    }
+    return nullptr; // warning C4715
+}
+
+static void writeConsoleWithStream(std::u16string_view sText, FILE * stream)
+{
+    OString s = OUStringToOString(sText, osl_getThreadTextEncoding());
+    fprintf(stream, "%s", s.getStr());
+    fflush(stream);
+}
+
+void writeConsole(std::u16string_view sText)
+{
+    writeConsoleWithStream(sText, stdout);
+}
+
+void writeConsoleError(std::u16string_view sText)
+{
+    writeConsoleWithStream(sText, stderr);
+}
+
+OUString readConsole()
+{
+    char buf[1024];
+    memset(buf, 0, 1024);
+    // read one char less so that the last char in buf is always zero
+    if (fgets(buf, 1024, stdin) != nullptr)
+    {
+        OUString value = OStringToOUString(std::string_view(buf), osl_getThreadTextEncoding());
+        return value.trim();
+    }
+    throw css::uno::RuntimeException("reading from stdin failed");
+}
+
+void TRACE(OUString const & sText)
+{
+    SAL_INFO("desktop.deployment", sText);
+}
+
+void syncRepositories(
+    bool force, Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    OUString sDisable;
+    ::rtl::Bootstrap::get( "DISABLE_EXTENSION_SYNCHRONIZATION", sDisable, OUString() );
+    if (!sDisable.isEmpty())
+        return;
+
+    Reference<deployment::XExtensionManager> xExtensionManager;
+    //synchronize shared before bundled otherwise there are
+    //more revoke and registration calls.
+    bool bModified = false;
+    if (force || needToSyncRepository(u"shared") || needToSyncRepository(u"bundled"))
+    {
+        xExtensionManager =
+            deployment::ExtensionManager::get(
+                comphelper::getProcessComponentContext());
+
+        if (xExtensionManager.is())
+        {
+            bModified = xExtensionManager->synchronize(
+                Reference<task::XAbortChannel>(), xCmdEnv);
+        }
+    }
+#if !HAVE_FEATURE_MACOSX_SANDBOX
+    if (bModified && !comphelper::LibreOfficeKit::isActive())
+    {
+        Reference<task::XRestartManager> restarter(task::OfficeRestartManager::get(comphelper::getProcessComponentContext()));
+        if (restarter.is())
+        {
+            restarter->requestRestart(xCmdEnv.is() ? xCmdEnv->getInteractionHandler() :
+                                      Reference<task::XInteractionHandler>());
+        }
+    }
+#endif
+}
+
+void disposeBridges(Reference<css::uno::XComponentContext> const & ctx)
+{
+    if (!ctx.is())
+        return;
+
+    Reference<css::bridge::XBridgeFactory2> bridgeFac( css::bridge::BridgeFactory::create(ctx) );
+
+    const Sequence< Reference<css::bridge::XBridge> >seqBridges = bridgeFac->getExistingBridges();
+    for (const Reference<css::bridge::XBridge>& bridge : seqBridges)
+    {
+        Reference<css::lang::XComponent> comp(bridge, UNO_QUERY);
+        if (comp.is())
+        {
+            try {
+                comp->dispose();
+            }
+            catch ( const css::lang::DisposedException& )
+            {
+            }
+        }
+    }
+}
+
+}
+
+OUString DpResId(TranslateId aId)
+{
+    static std::locale SINGLETON = Translate::Create("dkt");
+    return Translate::get(aId, SINGLETON);
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_platform.cxx b/desktop/source/deployment/misc/dp_platform.cxx
new file mode 100644
index 000000000..879e617b7
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_platform.cxx
@@ -0,0 +1,207 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <dp_platform.hxx>
+#include <rtl/ustring.hxx>
+#include <rtl/instance.hxx>
+#include <rtl/bootstrap.hxx>
+#include <osl/diagnose.h>
+#include <o3tl/string_view.hxx>
+
+constexpr OUStringLiteral PLATFORM_ALL = u"all";
+
+
+namespace dp_misc
+{
+namespace
+{
+    struct StrOperatingSystem :
+        public rtl::StaticWithInit<OUString, StrOperatingSystem> {
+             OUString operator () () {
+                OUString os( "$_OS" );
+                ::rtl::Bootstrap::expandMacros( os );
+                return os;
+            }
+    };
+
+    struct StrCPU :
+        public rtl::StaticWithInit<OUString, StrCPU> {
+            OUString operator () () {
+                OUString arch( "$_ARCH" );
+                ::rtl::Bootstrap::expandMacros( arch );
+                return arch;
+            }
+    };
+
+
+    struct StrPlatform : public rtl::StaticWithInit<
+        OUString, StrPlatform> {
+            OUString operator () () {
+                return StrOperatingSystem::get() + "_" + StrCPU::get();
+            }
+    };
+
+    bool checkOSandCPU(std::u16string_view os, std::u16string_view cpu)
+    {
+        return (os == StrOperatingSystem::get())
+            && (cpu == StrCPU::get());
+    }
+
+    bool isPlatformSupported( std::u16string_view token )
+    {
+        bool ret = false;
+        if (token == PLATFORM_ALL)
+            ret = true;
+        else if (token == u"windows_x86")
+            ret = checkOSandCPU(u"Windows", u"x86");
+        else if (token == u"windows_x86_64")
+            ret = checkOSandCPU(u"Windows", u"X86_64");
+        else if (token == u"windows_aarch64")
+            ret = checkOSandCPU(u"Windows", u"AARCH64");
+        else if (token == u"solaris_sparc")
+            ret = checkOSandCPU(u"Solaris", u"SPARC");
+        else if (token == u"solaris_sparc64")
+            ret = checkOSandCPU(u"Solaris", u"SPARC64");
+        else if (token == u"solaris_x86")
+            ret = checkOSandCPU(u"Solaris", u"x86");
+        else if (token == u"aix_powerpc")
+            ret = checkOSandCPU(u"AIX", u"PowerPC");
+        else if (token == u"macosx_aarch64")
+            ret = checkOSandCPU(u"MacOSX", u"AARCH64");
+        else if (token == u"macosx_x86_64")
+            ret = checkOSandCPU(u"MacOSX", u"X86_64");
+        else if (token == u"linux_x86")
+            ret = checkOSandCPU(u"Linux", u"x86");
+        else if (token == u"linux_x86_64")
+            ret = checkOSandCPU(u"Linux", u"X86_64");
+        else if (token == u"linux_sparc")
+            ret = checkOSandCPU(u"Linux", u"SPARC");
+        else if (token == u"linux_sparc64")
+            ret = checkOSandCPU(u"Linux", u"SPARC64");
+        else if (token == u"linux_powerpc")
+            ret = checkOSandCPU(u"Linux", u"PowerPC");
+        else if (token == u"linux_powerpc64")
+            ret = checkOSandCPU(u"Linux", u"PowerPC_64");
+        else if (token == u"linux_powerpc64_le")
+            ret = checkOSandCPU(u"Linux", u"PowerPC_64_LE");
+        else if (token == u"linux_arm_eabi")
+            ret = checkOSandCPU(u"Linux", u"ARM_EABI");
+        else if (token == u"linux_arm_oabi")
+            ret = checkOSandCPU(u"Linux", u"ARM_OABI");
+        else if (token == u"linux_mips_el")
+            ret = checkOSandCPU(u"Linux", u"MIPS_EL");
+        else if (token == u"linux_mips64_el")
+            ret = checkOSandCPU(u"Linux", u"MIPS64_EL");
+        else if (token == u"linux_mips_eb")
+            ret = checkOSandCPU(u"Linux", u"MIPS_EB");
+        else if (token == u"linux_mips64_eb")
+            ret = checkOSandCPU(u"Linux", u"MIPS64_EB");
+        else if (token == u"linux_ia64")
+            ret = checkOSandCPU(u"Linux", u"IA64");
+        else if (token == u"linux_m68k")
+            ret = checkOSandCPU(u"Linux", u"M68K");
+        else if (token == u"linux_s390")
+            ret = checkOSandCPU(u"Linux", u"S390");
+        else if (token == u"linux_s390x")
+            ret = checkOSandCPU(u"Linux", u"S390x");
+        else if (token == u"linux_hppa")
+            ret = checkOSandCPU(u"Linux", u"HPPA");
+        else if (token == u"linux_alpha")
+            ret = checkOSandCPU(u"Linux", u"ALPHA");
+        else if (token == u"linux_aarch64")
+            ret = checkOSandCPU(u"Linux", u"AARCH64");
+        else if (token == u"freebsd_x86")
+            ret = checkOSandCPU(u"FreeBSD", u"x86");
+        else if (token == u"freebsd_x86_64")
+            ret = checkOSandCPU(u"FreeBSD", u"X86_64");
+        else if (token == u"freebsd_powerpc")
+            ret = checkOSandCPU(u"FreeBSD", u"PowerPC");
+        else if (token == u"freebsd_powerpc64")
+            ret = checkOSandCPU(u"FreeBSD", u"PowerPC64");
+        else if (token == u"kfreebsd_x86")
+            ret = checkOSandCPU(u"kFreeBSD", u"x86");
+        else if (token == u"kfreebsd_x86_64")
+            ret = checkOSandCPU(u"kFreeBSD", u"X86_64");
+        else if (token == u"netbsd_x86")
+            ret = checkOSandCPU(u"NetBSD", u"x86");
+        else if (token == u"netbsd_x86_64")
+            ret = checkOSandCPU(u"NetBSD", u"X86_64");
+        else if (token == u"openbsd_x86")
+            ret = checkOSandCPU(u"OpenBSD", u"x86");
+        else if (token == u"openbsd_x86_64")
+            ret = checkOSandCPU(u"OpenBSD", u"X86_64");
+        else if (token == u"dragonfly_x86")
+            ret = checkOSandCPU(u"DragonFly", u"x86");
+        else if (token == u"dragonfly_x86_64")
+            ret = checkOSandCPU(u"DragonFly", u"X86_64");
+        else
+        {
+            OSL_FAIL("Extension Manager: The extension supports an unknown platform. "
+            "Check the platform in the description.xml");
+            ret = false;
+        }
+        return ret;
+    }
+
+} // anon namespace
+
+
+OUString const & getPlatformString()
+{
+    return StrPlatform::get();
+}
+
+bool platform_fits( std::u16string_view platform_string )
+{
+    sal_Int32 index = 0;
+    for (;;)
+    {
+        const std::u16string_view token(
+            o3tl::trim(o3tl::getToken(platform_string, 0, ',', index )) );
+        // check if this platform:
+        if (o3tl::equalsIgnoreAsciiCase( token, StrPlatform::get() ) ||
+            (token.find( '_' ) == std::u16string_view::npos && /* check OS part only */
+             o3tl::equalsIgnoreAsciiCase( token, StrOperatingSystem::get() )))
+        {
+            return true;
+        }
+        if (index < 0)
+            break;
+    }
+    return false;
+}
+
+bool hasValidPlatform( css::uno::Sequence<OUString> const & platformStrings)
+{
+    bool ret = false;
+    for (const OUString& s : platformStrings)
+    {
+        if ( isPlatformSupported( s ) )
+        {
+            ret = true;
+            break;
+        }
+    }
+    return ret;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_resource.cxx b/desktop/source/deployment/misc/dp_resource.cxx
new file mode 100644
index 000000000..682c90e52
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_resource.cxx
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <dp_resource.h>
+#include <unotools/configmgr.hxx>
+#include <i18nlangtag/languagetag.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_misc
+{
+const LanguageTag& getOfficeLanguageTag()
+{
+    static const LanguageTag OFFICE_LANG = []() {
+        OUString slang(utl::ConfigManager::getUILocale());
+        //fallback, the locale is currently only set when the user starts the
+        //office for the first time.
+        if (slang.isEmpty())
+            slang = "en-US";
+        return LanguageTag(slang);
+    }();
+    return OFFICE_LANG;
+}
+}
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_ucb.cxx b/desktop/source/deployment/misc/dp_ucb.cxx
new file mode 100644
index 000000000..28f4192ee
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_ucb.cxx
@@ -0,0 +1,304 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <rtl/uri.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <ucbhelper/content.hxx>
+#include <xmlscript/xml_helper.hxx>
+#include <com/sun/star/io/XOutputStream.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/ContentInfo.hpp>
+#include <com/sun/star/ucb/ContentInfoAttribute.hpp>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <comphelper/processfactory.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_misc
+{
+
+
+bool create_ucb_content(
+    ::ucbhelper::Content * ret_ucbContent, OUString const & url,
+    Reference<XCommandEnvironment> const & xCmdEnv,
+    bool throw_exc )
+{
+    try {
+        // Existence check...
+        // content ctor/isFolder() will throw exception in case the resource
+        // does not exist.
+
+        // dilemma: no chance to use the given handler here, because it would
+        //          raise no such file dialogs, else no interaction for
+        //          passwords, ...? xxx todo
+        ::ucbhelper::Content ucbContent(
+            url, Reference<XCommandEnvironment>(),
+            comphelper::getProcessComponentContext() );
+
+        ucbContent.isFolder();
+
+        if (ret_ucbContent != nullptr)
+        {
+            ucbContent.setCommandEnvironment( xCmdEnv );
+            *ret_ucbContent = ucbContent;
+        }
+        return true;
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        if (throw_exc)
+            throw;
+    }
+    return false;
+}
+
+
+bool create_folder(
+    ::ucbhelper::Content * ret_ucb_content, OUString const & url_,
+    Reference<XCommandEnvironment> const & xCmdEnv, bool throw_exc )
+{
+    ::ucbhelper::Content ucb_content;
+    if (create_ucb_content(
+            &ucb_content, url_, xCmdEnv, false /* no throw */ ))
+    {
+        if (ucb_content.isFolder()) {
+            if (ret_ucb_content != nullptr)
+                *ret_ucb_content = ucb_content;
+            return true;
+        }
+    }
+
+    OUString url( url_ );
+    // xxx todo: find parent
+    sal_Int32 slash = url.lastIndexOf( '/' );
+    if (slash < 0) {
+        // fallback:
+        url = expandUnoRcUrl( url );
+        slash = url.lastIndexOf( '/' );
+    }
+    if (slash < 0) {
+        // invalid: has to be at least "auth:/..."
+        if (throw_exc)
+            throw ContentCreationException(
+                "Cannot create folder (invalid path): '" + url + "'",
+                Reference<XInterface>(), ContentCreationError_UNKNOWN );
+        return false;
+    }
+    ::ucbhelper::Content parentContent;
+    if (! create_folder(
+            &parentContent, url.copy( 0, slash ), xCmdEnv, throw_exc ))
+        return false;
+    const Any title( ::rtl::Uri::decode( url.copy( slash + 1 ),
+                                         rtl_UriDecodeWithCharset,
+                                         RTL_TEXTENCODING_UTF8 ) );
+    const Sequence<ContentInfo> infos(
+        parentContent.queryCreatableContentsInfo() );
+    for ( ContentInfo const & info : infos )
+    {
+        // look KIND_FOLDER:
+        if ((info.Attributes & ContentInfoAttribute::KIND_FOLDER) != 0)
+        {
+            // make sure the only required bootstrap property is "Title":
+            Sequence<beans::Property> const & rProps = info.Properties;
+            if ( rProps.getLength() != 1 || rProps[ 0 ].Name != "Title" )
+                continue;
+
+            try {
+                if (parentContent.insertNewContent(
+                        info.Type,
+                        StrTitle::getTitleSequence(),
+                        Sequence<Any>( &title, 1 ),
+                        ucb_content )) {
+                    if (ret_ucb_content != nullptr)
+                        *ret_ucb_content = ucb_content;
+                    return true;
+                }
+            }
+            catch (const RuntimeException &) {
+                throw;
+            }
+            catch (const CommandFailedException &) {
+                // Interaction Handler already handled the error
+                // that has occurred...
+            }
+            catch (const Exception &) {
+                if (throw_exc)
+                    throw;
+                return false;
+            }
+        }
+    }
+    if (throw_exc)
+        throw ContentCreationException(
+            "Cannot create folder: '" + url + "'",
+            Reference<XInterface>(), ContentCreationError_UNKNOWN );
+    return false;
+}
+
+
+bool erase_path( OUString const & url,
+                 Reference<XCommandEnvironment> const & xCmdEnv,
+                 bool throw_exc )
+{
+    ::ucbhelper::Content ucb_content;
+    if (create_ucb_content( &ucb_content, url, xCmdEnv, false /* no throw */ ))
+    {
+        try {
+            ucb_content.executeCommand(
+                "delete", Any( true /* delete physically */ ) );
+        }
+        catch (const RuntimeException &) {
+            throw;
+        }
+        catch (const Exception &) {
+            if (throw_exc)
+                throw;
+            return false;
+        }
+    }
+    return true;
+}
+
+
+std::vector<sal_Int8> readFile( ::ucbhelper::Content & ucb_content )
+{
+    std::vector<sal_Int8> bytes;
+    Reference<io::XOutputStream> xStream(
+        ::xmlscript::createOutputStream( &bytes ) );
+    if (! ucb_content.openStream( xStream ))
+        throw RuntimeException(
+            "::ucbhelper::Content::openStream( XOutputStream ) failed!",
+            nullptr );
+    return bytes;
+}
+
+
+bool readLine( OUString * res, OUString const & startingWith,
+               ::ucbhelper::Content & ucb_content, rtl_TextEncoding textenc )
+{
+    // read whole file:
+    std::vector<sal_Int8> bytes( readFile( ucb_content ) );
+    OUString file( reinterpret_cast<char const *>(bytes.data()),
+                   bytes.size(), textenc );
+    sal_Int32 pos = 0;
+    for (;;)
+    {
+        if (file.match( startingWith, pos ))
+        {
+            OUStringBuffer buf;
+            sal_Int32 start = pos;
+            pos += startingWith.getLength();
+            for (;;)
+            {
+                pos = file.indexOf( LF, pos );
+                if (pos < 0) { // EOF
+                    buf.append( file.subView(start) );
+                }
+                else
+                {
+                    if (pos > 0 && file[ pos - 1 ] == CR)
+                    {
+                        // consume extra CR
+                        buf.append( file.subView(start, pos - start - 1) );
+                        ++pos;
+                    }
+                    else
+                        buf.append( file.subView(start, pos - start) );
+                    ++pos; // consume LF
+                    // check next line:
+                    if (pos < file.getLength() &&
+                        (file[ pos ] == ' ' || file[ pos ] == '\t'))
+                    {
+                        buf.append( ' ' );
+                        ++pos;
+                        start = pos;
+                        continue;
+                    }
+                }
+                break;
+            }
+            *res = buf.makeStringAndClear();
+            return true;
+        }
+        // next line:
+        sal_Int32 next_lf = file.indexOf( LF, pos );
+        if (next_lf < 0) // EOF
+            break;
+        pos = next_lf + 1;
+    }
+    return false;
+}
+
+bool readProperties( std::vector< std::pair< OUString, OUString> > & out_result,
+                     ::ucbhelper::Content & ucb_content )
+{
+    // read whole file:
+    std::vector<sal_Int8> bytes( readFile( ucb_content ) );
+    OUString file( reinterpret_cast<char const *>(bytes.data()),
+                   bytes.size(), RTL_TEXTENCODING_UTF8);
+    sal_Int32 pos = 0;
+
+    for (;;)
+    {
+
+        OUStringBuffer buf;
+        sal_Int32 start = pos;
+
+        bool bEOF = false;
+        pos = file.indexOf( LF, pos );
+        if (pos < 0) { // EOF
+            buf.append( file.subView(start) );
+            bEOF = true;
+        }
+        else
+        {
+            if (pos > 0 && file[ pos - 1 ] == CR)
+                // consume extra CR
+                buf.append( file.subView(start, pos - start - 1) );
+            else
+                buf.append( file.subView(start, pos - start) );
+            pos++;
+        }
+        OUString aLine = buf.makeStringAndClear();
+
+        sal_Int32 posEqual = aLine.indexOf('=');
+        if (posEqual > 0 && (posEqual + 1) <  aLine.getLength())
+        {
+            OUString name = aLine.copy(0, posEqual);
+            OUString value = aLine.copy(posEqual + 1);
+            out_result.emplace_back(name, value);
+        }
+
+        if (bEOF)
+            break;
+    }
+    return false;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_update.cxx b/desktop/source/deployment/misc/dp_update.cxx
new file mode 100644
index 000000000..7116be42b
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_update.cxx
@@ -0,0 +1,408 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_folders.h>
+
+#include <dp_update.hxx>
+#include <dp_version.hxx>
+#include <dp_identifier.hxx>
+#include <dp_descriptioninfoset.hxx>
+
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <osl/diagnose.h>
+#include <rtl/bootstrap.hxx>
+#include <sal/log.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+
+namespace dp_misc {
+namespace {
+
+int determineHighestVersion(
+    OUString const & userVersion,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion)
+{
+    int index = 0;
+    OUString  greatest = userVersion;
+    if (dp_misc::compareVersions(sharedVersion, greatest) == dp_misc::GREATER)
+    {
+        index = 1;
+        greatest = sharedVersion;
+    }
+    if (dp_misc::compareVersions(bundledVersion, greatest) == dp_misc::GREATER)
+    {
+        index = 2;
+        greatest = bundledVersion;
+    }
+    if (dp_misc::compareVersions(onlineVersion, greatest) == dp_misc::GREATER)
+    {
+        index = 3;
+    }
+    return index;
+}
+
+Sequence< Reference< xml::dom::XElement > >
+getUpdateInformation( Reference<deployment::XUpdateInformationProvider > const & updateInformation,
+                      Sequence< OUString > const & urls,
+                      OUString const & identifier,
+                      uno::Any & out_error)
+{
+    try {
+        return updateInformation->getUpdateInformation(urls, identifier);
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (const ucb::CommandFailedException & e) {
+        out_error = e.Reason;
+    } catch (const ucb::CommandAbortedException &) {
+    } catch (const uno::Exception & e) {
+        out_error <<= e;
+    }
+    return
+        Sequence<Reference< xml::dom::XElement > >();
+}
+
+void getOwnUpdateInfos(
+        Reference<uno::XComponentContext> const & xContext,
+        Reference<deployment::XUpdateInformationProvider > const &  updateInformation,
+        UpdateInfoMap& inout_map, std::vector<std::pair<Reference<deployment::XPackage>, uno::Any> > & out_errors,
+        bool & out_allFound)
+{
+    bool bAllHaveOwnUpdateInformation = true;
+    for (auto & inout : inout_map)
+    {
+        OSL_ASSERT(inout.second.extension.is());
+        Sequence<OUString> urls(inout.second.extension->getUpdateInformationURLs());
+        if (urls.hasElements())
+        {
+            const OUString search_id = dp_misc::getIdentifier(inout.second.extension);
+            SAL_INFO( "extensions.update", "Searching update for " << search_id );
+            uno::Any anyError;
+            //It is unclear from the idl if there can be a null reference returned.
+            //However all valid information should be the same
+            const Sequence<Reference< xml::dom::XElement > >
+                infos(getUpdateInformation(updateInformation, urls, search_id, anyError));
+            if (anyError.hasValue())
+                out_errors.emplace_back(inout.second.extension, anyError);
+
+            for (const Reference< xml::dom::XElement >& element : infos)
+            {
+                dp_misc::DescriptionInfoset infoset(
+                    xContext,
+                    Reference< xml::dom::XNode >(element, UNO_QUERY_THROW));
+                if (!infoset.hasDescription())
+                    continue;
+                std::optional< OUString > result_id(infoset.getIdentifier());
+                if (!result_id)
+                    continue;
+                SAL_INFO( "extensions.update", "  found version "
+                          << infoset.getVersion() << " for " << *result_id );
+                if (*result_id != search_id)
+                    continue;
+                inout.second.version = infoset.getVersion();
+                inout.second.info.set(element, UNO_QUERY_THROW);
+                break;
+            }
+        }
+        else
+        {
+            bAllHaveOwnUpdateInformation = false;
+        }
+    }
+    out_allFound = bAllHaveOwnUpdateInformation;
+}
+
+void getDefaultUpdateInfos(
+    Reference<uno::XComponentContext> const & xContext,
+    Reference<deployment::XUpdateInformationProvider > const &  updateInformation,
+    UpdateInfoMap& inout_map,
+     std::vector<std::pair<Reference<deployment::XPackage>, uno::Any> > & out_errors)
+{
+    const OUString sDefaultURL(dp_misc::getExtensionDefaultUpdateURL());
+    OSL_ASSERT(!sDefaultURL.isEmpty());
+
+    Any anyError;
+    const Sequence< Reference< xml::dom::XElement > >
+        infos(
+            getUpdateInformation(
+                updateInformation,
+                Sequence< OUString >(&sDefaultURL, 1), OUString(), anyError));
+    if (anyError.hasValue())
+        out_errors.emplace_back(Reference<deployment::XPackage>(), anyError);
+    for (const Reference< xml::dom::XElement >& element : infos)
+    {
+        Reference< xml::dom::XNode > node(element, UNO_QUERY_THROW);
+        dp_misc::DescriptionInfoset infoset(xContext, node);
+        std::optional< OUString > id(infoset.getIdentifier());
+        if (!id) {
+            continue;
+        }
+        UpdateInfoMap::iterator j = inout_map.find(*id);
+        if (j != inout_map.end())
+        {
+            //skip those extension which provide its own update urls
+            if (j->second.extension->getUpdateInformationURLs().getLength())
+                continue;
+            OUString v(infoset.getVersion());
+            //look for the highest version in the online repository
+            if (dp_misc::compareVersions(v, j->second.version) ==
+                dp_misc::GREATER)
+            {
+                j->second.version = v;
+                j->second.info = node;
+            }
+        }
+    }
+}
+
+bool containsBundledOnly(Sequence<Reference<deployment::XPackage> > const & sameIdExtensions)
+{
+    OSL_ASSERT(sameIdExtensions.getLength() == 3);
+    return !sameIdExtensions[0].is() && !sameIdExtensions[1].is() && sameIdExtensions[2].is();
+}
+
+/** Returns true if the list of extensions are bundled extensions and there are no
+    other extensions with the same identifier in the shared or user repository.
+    If extensionList is NULL, then it is checked if there are only bundled extensions.
+*/
+bool onlyBundledExtensions(
+    Reference<deployment::XExtensionManager> const & xExtMgr,
+    std::vector< Reference<deployment::XPackage > > const * extensionList)
+{
+    OSL_ASSERT(xExtMgr.is());
+    bool bOnlyBundled = true;
+    if (extensionList)
+    {
+        for (auto const& elem : *extensionList)
+        {
+            Sequence<Reference<deployment::XPackage> > seqExt = xExtMgr->getExtensionsWithSameIdentifier(
+                dp_misc::getIdentifier(elem), elem->getName(), Reference<ucb::XCommandEnvironment>());
+
+            bOnlyBundled = containsBundledOnly(seqExt);
+            if (!bOnlyBundled)
+                break;
+        }
+    }
+    else
+    {
+        const uno::Sequence< uno::Sequence< Reference<deployment::XPackage > > > seqAllExt =
+            xExtMgr->getAllExtensions(Reference<task::XAbortChannel>(), Reference<ucb::XCommandEnvironment>());
+
+        for (int pos(0), nLen(seqAllExt.getLength()); bOnlyBundled && pos != nLen; ++pos)
+        {
+            bOnlyBundled = containsBundledOnly(seqAllExt[pos]);
+        }
+    }
+    return bOnlyBundled;
+}
+
+} // anon namespace
+
+
+OUString getExtensionDefaultUpdateURL()
+{
+    OUString sUrl(
+        "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version")
+        ":Version:ExtensionUpdateURL}");
+    ::rtl::Bootstrap::expandMacros(sUrl);
+    return sUrl;
+}
+
+/* returns the index of the greatest version, starting with 0
+
+ */
+UPDATE_SOURCE isUpdateUserExtension(
+    bool bReadOnlyShared,
+    OUString const & userVersion,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion)
+{
+    UPDATE_SOURCE retVal = UPDATE_SOURCE_NONE;
+    if (bReadOnlyShared)
+    {
+        if (!userVersion.isEmpty())
+        {
+            int index = determineHighestVersion(
+                userVersion, sharedVersion, bundledVersion, onlineVersion);
+            if (index == 1)
+                retVal = UPDATE_SOURCE_SHARED;
+            else if (index == 2)
+                retVal = UPDATE_SOURCE_BUNDLED;
+            else if (index == 3)
+                retVal = UPDATE_SOURCE_ONLINE;
+        }
+        else if (!sharedVersion.isEmpty())
+        {
+            int index = determineHighestVersion(
+                OUString(), sharedVersion, bundledVersion, onlineVersion);
+            if (index == 2)
+                retVal = UPDATE_SOURCE_BUNDLED;
+            else if (index == 3)
+                retVal = UPDATE_SOURCE_ONLINE;
+
+        }
+    }
+    else
+    {
+        if (!userVersion.isEmpty())
+        {
+            int index = determineHighestVersion(
+                userVersion, sharedVersion, bundledVersion, onlineVersion);
+            if (index == 1)
+                retVal = UPDATE_SOURCE_SHARED;
+            else if (index == 2)
+                retVal = UPDATE_SOURCE_BUNDLED;
+            else if (index == 3)
+                retVal = UPDATE_SOURCE_ONLINE;
+        }
+    }
+
+    return retVal;
+}
+
+UPDATE_SOURCE isUpdateSharedExtension(
+    bool bReadOnlyShared,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion)
+{
+    if (bReadOnlyShared)
+        return UPDATE_SOURCE_NONE;
+    UPDATE_SOURCE retVal = UPDATE_SOURCE_NONE;
+
+    if (!sharedVersion.isEmpty())
+    {
+        int index = determineHighestVersion(
+            OUString(), sharedVersion, bundledVersion, onlineVersion);
+        if (index == 2)
+            retVal = UPDATE_SOURCE_BUNDLED;
+        else if (index == 3)
+            retVal = UPDATE_SOURCE_ONLINE;
+    }
+    return retVal;
+}
+
+Reference<deployment::XPackage>
+getExtensionWithHighestVersion(
+    Sequence<Reference<deployment::XPackage> > const & seqExt)
+{
+    if (!seqExt.hasElements())
+        return Reference<deployment::XPackage>();
+
+    Reference<deployment::XPackage> greatest;
+    sal_Int32 len = seqExt.getLength();
+
+    for (sal_Int32 i = 0; i < len; i++)
+    {
+        if (!greatest.is())
+        {
+            greatest = seqExt[i];
+            continue;
+        }
+        Reference<deployment::XPackage> const & current = seqExt[i];
+        //greatest has a value
+        if (! current.is())
+            continue;
+
+        if (dp_misc::compareVersions(current->getVersion(), greatest->getVersion()) == dp_misc::GREATER)
+            greatest = current;
+    }
+    return greatest;
+}
+
+UpdateInfo::UpdateInfo( Reference< deployment::XPackage> const & ext):
+extension(ext)
+{
+}
+
+
+UpdateInfoMap getOnlineUpdateInfos(
+    Reference<uno::XComponentContext> const &xContext,
+    Reference<deployment::XExtensionManager> const & xExtMgr,
+    Reference<deployment::XUpdateInformationProvider > const & updateInformation,
+    std::vector<Reference<deployment::XPackage > > const * extensionList,
+    std::vector<std::pair< Reference<deployment::XPackage>, uno::Any> > & out_errors)
+{
+    OSL_ASSERT(xExtMgr.is());
+    UpdateInfoMap infoMap;
+    if (!xExtMgr.is() || onlyBundledExtensions(xExtMgr, extensionList))
+        return infoMap;
+
+    if (!extensionList)
+    {
+        const uno::Sequence< uno::Sequence< Reference<deployment::XPackage > > > seqAllExt =  xExtMgr->getAllExtensions(
+            Reference<task::XAbortChannel>(), Reference<ucb::XCommandEnvironment>());
+
+        //fill the UpdateInfoMap. key = extension identifier, value = UpdateInfo
+        for (int pos = seqAllExt.getLength(); pos --; )
+        {
+            uno::Sequence<Reference<deployment::XPackage> > const &   seqExt = seqAllExt[pos];
+
+            Reference<deployment::XPackage> extension = getExtensionWithHighestVersion(seqExt);
+            OSL_ASSERT(extension.is());
+
+            std::pair<UpdateInfoMap::iterator, bool> insertRet = infoMap.emplace(
+                    dp_misc::getIdentifier(extension), UpdateInfo(extension));
+            OSL_ASSERT(insertRet.second);
+        }
+    }
+    else
+    {
+        for (auto const& elem : *extensionList)
+        {
+            OSL_ASSERT(elem.is());
+            std::pair<UpdateInfoMap::iterator, bool> insertRet = infoMap.emplace(
+                    dp_misc::getIdentifier(elem), UpdateInfo(elem));
+            OSL_ASSERT(insertRet.second);
+        }
+    }
+
+    //Now find the update information for the extensions which provide their own
+    //URLs to update information.
+    bool bAllInfosObtained = false;
+    getOwnUpdateInfos(xContext, updateInformation, infoMap, out_errors, bAllInfosObtained);
+
+    if (!bAllInfosObtained)
+        getDefaultUpdateInfos(xContext, updateInformation, infoMap, out_errors);
+    return infoMap;
+}
+OUString getHighestVersion(
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion)
+{
+    int index = determineHighestVersion(OUString(), sharedVersion, bundledVersion, onlineVersion);
+    switch (index)
+    {
+    case 1: return sharedVersion;
+    case 2: return bundledVersion;
+    case 3: return onlineVersion;
+    default: OSL_ASSERT(false);
+    }
+
+    return OUString();
+}
+} //namespace dp_misc
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_version.cxx b/desktop/source/deployment/misc/dp_version.cxx
new file mode 100644
index 000000000..703045dde
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_version.cxx
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <sal/config.h>
+
+#include <rtl/ustring.hxx>
+
+#include <dp_version.hxx>
+
+namespace {
+
+OUString getElement(OUString const & version, ::sal_Int32 * index)
+{
+    while (*index < version.getLength() && version[*index] == '0') {
+        ++*index;
+    }
+    return version.getToken(0, '.', *index);
+}
+
+}
+
+namespace dp_misc {
+
+::dp_misc::Order compareVersions(
+    OUString const & version1, OUString const & version2)
+{
+    for (::sal_Int32 i1 = 0, i2 = 0; i1 >= 0 || i2 >= 0;) {
+        OUString e1(i1 >= 0 ? getElement(version1, &i1) : OUString());
+        OUString e2(i2 >= 0 ? getElement(version2, &i2) : OUString());
+        if (e1.getLength() < e2.getLength()) {
+            return ::dp_misc::LESS;
+        } else if (e1.getLength() > e2.getLength()) {
+            return ::dp_misc::GREATER;
+        } else if (e1 < e2) {
+            return ::dp_misc::LESS;
+        } else if (e1 > e2) {
+            return ::dp_misc::GREATER;
+        }
+    }
+    return ::dp_misc::EQUAL;
+}
+
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/lockfile.cxx b/desktop/source/deployment/misc/lockfile.cxx
new file mode 100644
index 000000000..206da8286
--- /dev/null
+++ b/desktop/source/deployment/misc/lockfile.cxx
@@ -0,0 +1,211 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <memory>
+
+#include <time.h>
+#ifndef _WIN32
+#include <unistd.h>
+#else
+#if !defined WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#endif
+#include <comphelper/random.hxx>
+#include <sal/types.h>
+#include <osl/file.hxx>
+#include <osl/security.hxx>
+#include <unotools/bootstrap.hxx>
+#include <tools/config.hxx>
+
+#include <lockfile.hxx>
+
+using namespace ::osl;
+using namespace ::utl;
+
+
+static OString impl_getHostname()
+{
+    OString aHost;
+#ifdef _WIN32
+    /*
+       prevent windows from connecting to the net to get its own
+       hostname by using the netbios name
+       */
+    DWORD sz = MAX_COMPUTERNAME_LENGTH + 1;
+    TCHAR szHost[MAX_COMPUTERNAME_LENGTH + 1];
+    if (GetComputerNameA(szHost, &sz))
+        aHost = OString(szHost);
+    else
+        aHost = OString("UNKNOWN");
+#else
+    /* Don't do dns lookup on Linux either */
+    char pHostName[1024];
+
+    if ( gethostname( pHostName, sizeof( pHostName ) - 1 ) == 0 )
+    {
+        pHostName[sizeof( pHostName ) - 1] = '\0';
+        aHost = OString( pHostName );
+    }
+    else
+        aHost = OString("UNKNOWN");
+#endif
+
+    return aHost;
+}
+
+namespace desktop {
+
+    Lockfile::Lockfile( bool bIPCserver )
+    :m_bIPCserver(bIPCserver)
+    ,m_bRemove(false)
+    ,m_bIsLocked(false)
+    {
+        // build the file-url to use for the lock
+        OUString aUserPath;
+        utl::Bootstrap::locateUserInstallation( aUserPath );
+        m_aLockname = aUserPath + "/.lock";
+
+        // generate ID
+        const int nIdBytes = 16;
+        char tmpId[nIdBytes*2+1];
+        time_t t = time(nullptr);
+        for (int i = 0; i<nIdBytes; i++) {
+            int tmpByte = comphelper::rng::uniform_int_distribution(0, 0xFF);
+            sprintf( tmpId+i*2, "%02X", tmpByte );
+        }
+        tmpId[nIdBytes*2]=0x00;
+        m_aId = OUString::createFromAscii( tmpId );
+
+        // generate date string
+        char *tmpTime = ctime( &t );
+        if (tmpTime != nullptr) {
+            m_aDate = OUString::createFromAscii( tmpTime );
+            sal_Int32 i = m_aDate.indexOf('\n');
+            if (i > 0)
+                m_aDate = m_aDate.copy(0, i);
+        }
+
+
+        // try to create file
+        File aFile(m_aLockname);
+        if (aFile.open( osl_File_OpenFlag_Create ) == File::E_EXIST) {
+            m_bIsLocked = true;
+        } else {
+            // new lock created
+            aFile.close( );
+            syncToFile( );
+            m_bRemove = true;
+        }
+    }
+
+    bool Lockfile::check( fpExecWarning execWarning )
+    {
+
+        if (m_bIsLocked) {
+            // lock existed, ask user what to do
+            if (isStale() ||
+                (execWarning != nullptr && (*execWarning)( this ))) {
+                // remove file and create new
+                File::remove( m_aLockname );
+                File aFile(m_aLockname);
+                (void)aFile.open( osl_File_OpenFlag_Create );
+                aFile.close( );
+                syncToFile( );
+                m_bRemove = true;
+                return true;
+            } else {
+                //leave alone and return false
+                m_bRemove = false;
+                return false;
+            }
+        } else {
+            // lock was created by us
+            return true;
+        }
+    }
+
+    bool Lockfile::isStale() const
+    {
+        // this checks whether the lockfile was created on the same
+        // host by the same user. Should this be the case it is safe
+        // to assume that it is a stale lockfile which can be overwritten
+        OUString aLockname = m_aLockname;
+        Config aConfig(aLockname);
+        aConfig.SetGroup(LOCKFILE_GROUP);
+        OString aIPCserver  = aConfig.ReadKey( LOCKFILE_IPCKEY );
+        if (!aIPCserver.equalsIgnoreAsciiCase("true"))
+            return false;
+
+        OString aHost = aConfig.ReadKey( LOCKFILE_HOSTKEY );
+        OString aUser = aConfig.ReadKey( LOCKFILE_USERKEY );
+
+        // lockfile from same host?
+        OString myHost( impl_getHostname() );
+        if (aHost == myHost) {
+            // lockfile by same UID
+            OUString myUserName;
+            Security aSecurity;
+            aSecurity.getUserName( myUserName );
+            OString myUser(OUStringToOString(myUserName, RTL_TEXTENCODING_ASCII_US));
+            if (aUser == myUser)
+                return true;
+        }
+        return false;
+    }
+
+    void Lockfile::syncToFile() const
+    {
+        OUString aLockname = m_aLockname;
+        Config aConfig(aLockname);
+        aConfig.SetGroup(LOCKFILE_GROUP);
+
+        // get information
+        OString aHost( impl_getHostname() );
+        OUString aUserName;
+        Security aSecurity;
+        aSecurity.getUserName( aUserName );
+        OString aUser  = OUStringToOString( aUserName, RTL_TEXTENCODING_ASCII_US );
+        OString aTime  = OUStringToOString( m_aDate, RTL_TEXTENCODING_ASCII_US );
+        OString aStamp = OUStringToOString( m_aId, RTL_TEXTENCODING_ASCII_US );
+
+        // write information
+        aConfig.WriteKey( LOCKFILE_USERKEY,  aUser );
+        aConfig.WriteKey( LOCKFILE_HOSTKEY,  aHost );
+        aConfig.WriteKey( LOCKFILE_STAMPKEY, aStamp );
+        aConfig.WriteKey( LOCKFILE_TIMEKEY,  aTime );
+        aConfig.WriteKey(
+            LOCKFILE_IPCKEY,
+            m_bIPCserver ? OString("true") : OString("false") );
+        aConfig.Flush( );
+    }
+
+    Lockfile::~Lockfile()
+    {
+        // unlock userdata by removing file
+        if ( m_bRemove )
+            File::remove( m_aLockname );
+    }
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/component/dp_compbackenddb.cxx b/desktop/source/deployment/registry/component/dp_compbackenddb.cxx
new file mode 100644
index 000000000..fd9bb2c61
--- /dev/null
+++ b/desktop/source/deployment/registry/component/dp_compbackenddb.cxx
@@ -0,0 +1,131 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include "dp_compbackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/component-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"comp";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"component-backend-db";
+constexpr OUStringLiteral KEY_ELEMENT_NAME = u"component";
+
+namespace dp_registry::backend::component {
+
+ComponentBackendDb::ComponentBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):BackendDb(xContext, url)
+{
+
+}
+
+OUString ComponentBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString ComponentBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString ComponentBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString ComponentBackendDb::getKeyElementName()
+{
+    return KEY_ELEMENT_NAME;
+}
+
+void ComponentBackendDb::addEntry(OUString const & url, Data const & data)
+{
+    try{
+        if (!activateEntry(url))
+        {
+            Reference<css::xml::dom::XNode> componentNode = writeKeyElement(url);
+            writeSimpleElement(u"java-type-library",
+                               OUString::boolean(data.javaTypeLibrary),
+                               componentNode);
+
+            writeSimpleList(
+                data.implementationNames,
+                u"implementation-names",
+                u"name",
+                componentNode);
+
+            writeVectorOfPair(
+                data.singletons,
+                u"singletons",
+                u"item",
+                u"key",
+                u"value",
+                componentNode);
+
+            save();
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+ComponentBackendDb::Data ComponentBackendDb::getEntry(std::u16string_view url)
+{
+    try
+    {
+        ComponentBackendDb::Data retData;
+        Reference<css::xml::dom::XNode> aNode = getKeyElement(url);
+        if (aNode.is())
+        {
+            bool bJava = readSimpleElement(u"java-type-library", aNode) == "true";
+            retData.javaTypeLibrary = bJava;
+
+            retData.implementationNames =
+                readList( aNode, u"implementation-names", u"name");
+
+            retData.singletons =
+                readVectorOfPair( aNode, u"singletons", u"item", u"key", u"value");
+        }
+        return retData;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+
+} // namespace dp_registry::backend::component
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/component/dp_compbackenddb.hxx b/desktop/source/deployment/registry/component/dp_compbackenddb.hxx
new file mode 100644
index 000000000..84153b6fa
--- /dev/null
+++ b/desktop/source/deployment/registry/component/dp_compbackenddb.hxx
@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <rtl/string.hxx>
+#include <vector>
+#include <deque>
+#include <string_view>
+
+#include <dp_backenddb.hxx>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+namespace dp_registry::backend::component {
+
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+   The format looks like this:
+
+<?xml version="1.0"?>
+<component-backend-db xmlns="http://openoffice.org/extensionmanager/component-registry/2010">
+  <component url="vnd.sun.star.expand:$UNO_USER_PACKAGES_CACHE/uno_packages/5CD5.tmp_/leaves1.oxt/extensionoptions.jar">
+    <name>FileName</name>
+    <java-type-library>true</java-type-library>
+    <implementation-names>
+      <name>com.sun.star.comp.extensionoptions.OptionsEventHandler$_OptionsEventHandler</name>
+      ...
+    </implementation-names>
+    <singletons>
+      <item>
+        <key>com.sun.star.java.theJavaVirtualMachine</key>
+        <value>com.sun.star.java.JavaVirtualMachine</value>
+      </item>
+      ...
+    </singletons>
+  </component>
+
+  <component ...>
+  ...
+</component-backend-db>
+ */
+class ComponentBackendDb: public dp_registry::backend::BackendDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+    virtual OUString getNSPrefix() override;
+    virtual OUString getRootElementName() override;
+    virtual OUString getKeyElementName() override;
+
+public:
+    struct Data
+    {
+        Data(): javaTypeLibrary(false) {};
+
+        std::deque< OUString> implementationNames;
+        std::vector< std::pair< OUString, OUString> >singletons;
+            // map from singleton names to implementation names
+        bool javaTypeLibrary;
+    };
+
+public:
+
+    ComponentBackendDb( css::uno::Reference<css::uno::XComponentContext> const &  xContext,
+                        OUString const & url);
+
+    void addEntry(OUString const & url, Data const & data);
+
+    Data getEntry(std::u16string_view url);
+
+
+};
+
+
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/component/dp_component.cxx b/desktop/source/deployment/registry/component/dp_component.cxx
new file mode 100644
index 000000000..b9aa6518a
--- /dev/null
+++ b/desktop/source/deployment/registry/component/dp_component.cxx
@@ -0,0 +1,1720 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <strings.hrc>
+#include <dp_misc.h>
+#include <dp_shared.hxx>
+#include <dp_backend.h>
+#include <dp_platform.hxx>
+#include <dp_ucb.h>
+#include <rtl/string.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/uri.hxx>
+#include <sal/log.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <ucbhelper/content.hxx>
+#include <comphelper/sequence.hxx>
+#include <utility>
+#include <xmlscript/xml_helper.hxx>
+#include <svl/inettype.hxx>
+#include <tools/diagnose_ex.h>
+#include <o3tl/string_view.hxx>
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/container/XSet.hpp>
+#include <com/sun/star/registry/XSimpleRegistry.hpp>
+#include <com/sun/star/registry/XImplementationRegistration.hpp>
+#include <com/sun/star/loader/XImplementationLoader.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/ucb/NameClash.hpp>
+#include <com/sun/star/util/theMacroExpander.hpp>
+#include <algorithm>
+#include <deque>
+#include <memory>
+#include <string_view>
+#include <unordered_map>
+#include <vector>
+#include "dp_compbackenddb.hxx"
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend::component {
+namespace {
+
+/** return a vector of bootstrap variables which have been provided
+    as command arguments.
+*/
+std::vector<OUString> getCmdBootstrapVariables()
+{
+    std::vector<OUString> ret;
+    sal_uInt32 count = osl_getCommandArgCount();
+    for (sal_uInt32 i = 0; i < count; i++)
+    {
+        OUString arg;
+        osl_getCommandArg(i, &arg.pData);
+        if (arg.startsWith("-env:"))
+            ret.push_back(arg);
+    }
+    return ret;
+}
+
+bool jarManifestHeaderPresent(
+    OUString const & url, OUString const & name,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    OUString buf = "vnd.sun.star.zip://"
+        + ::rtl::Uri::encode(
+            url, rtl_UriCharClassRegName, rtl_UriEncodeIgnoreEscapes,
+            RTL_TEXTENCODING_UTF8 )
+        + "/META-INF/MANIFEST.MF";
+    ::ucbhelper::Content manifestContent;
+    OUString line;
+    return
+        create_ucb_content(
+            &manifestContent, buf, xCmdEnv,
+            false /* no throw */ )
+        && readLine( &line, name, manifestContent, RTL_TEXTENCODING_ASCII_US );
+}
+
+
+class BackendImpl : public ::dp_registry::backend::PackageRegistryBackend
+{
+    class ComponentPackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        const OUString m_loader;
+
+        enum class Reg { Uninit, Void, Registered, NotRegistered, MaybeRegistered };
+        Reg m_registered;
+
+        void getComponentInfo(
+            ComponentBackendDb::Data * data,
+            std::vector< css::uno::Reference< css::uno::XInterface > > *
+                factories,
+            Reference<XComponentContext> const & xContext );
+
+        void componentLiveInsertion(
+            ComponentBackendDb::Data const & data,
+            std::vector< css::uno::Reference< css::uno::XInterface > > const &
+                factories);
+
+        void componentLiveRemoval(ComponentBackendDb::Data const & data);
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+        Reference<registry::XSimpleRegistry> getRDB() const;
+
+    public:
+        ComponentPackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            OUString loader, bool bRemoved,
+            OUString const & identifier);
+    };
+    friend class ComponentPackageImpl;
+
+    class ComponentsPackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+    public:
+        ComponentsPackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool bRemoved, OUString const & identifier);
+    };
+    friend class ComponentsPackageImpl;
+
+    class TypelibraryPackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        const bool m_jarFile;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    public:
+        TypelibraryPackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool jarFile, bool bRemoved,
+            OUString const & identifier);
+    };
+    friend class TypelibraryPackageImpl;
+
+    /** Serves for unregistering packages that were registered on a
+        different platform. This can happen if one has remotely mounted
+        /home, for example.
+     */
+    class OtherPlatformPackageImpl : public ::dp_registry::backend::Package
+    {
+    public:
+        OtherPlatformPackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool bRemoved, OUString const & identifier, OUString platform);
+
+    private:
+        BackendImpl * getMyBackend() const;
+
+        Reference<registry::XSimpleRegistry> impl_openRDB() const;
+        Reference<XInterface> impl_createInstance(OUString const& rService) const;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    private:
+        OUString const m_aPlatform;
+    };
+    friend class OtherPlatformPackageImpl;
+
+    std::deque<OUString> m_jar_typelibs;
+    std::deque<OUString> m_rdb_typelibs;
+    std::deque<OUString> m_components;
+
+    enum RcItem { RCITEM_JAR_TYPELIB, RCITEM_RDB_TYPELIB, RCITEM_COMPONENTS };
+
+    std::deque<OUString> & getRcItemList( RcItem kind ) {
+        switch (kind)
+        {
+        case RCITEM_JAR_TYPELIB:
+            return m_jar_typelibs;
+        case RCITEM_RDB_TYPELIB:
+            return m_rdb_typelibs;
+        default: // case RCITEM_COMPONENTS
+            return m_components;
+        }
+    }
+
+    bool m_unorc_inited;
+    bool m_unorc_modified;
+    bool bSwitchedRdbFiles;
+
+    typedef std::unordered_map< OUString, Reference<XInterface> > t_string2object;
+    t_string2object m_backendObjects;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL disposing() override;
+
+    const Reference<deployment::XPackageTypeInfo> m_xDynComponentTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xJavaComponentTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xPythonComponentTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xComponentsTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xRDBTypelibTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xJavaTypelibTypeInfo;
+    Sequence< Reference<deployment::XPackageTypeInfo> > m_typeInfos;
+
+    OUString m_commonRDB;
+    OUString m_nativeRDB;
+
+    //URLs of the original rdbs (before any switching):
+    OUString m_commonRDB_orig;
+    OUString m_nativeRDB_orig;
+
+    std::unique_ptr<ComponentBackendDb> m_backendDb;
+
+    void addDataToDb(OUString const & url, ComponentBackendDb::Data const & data);
+    ComponentBackendDb::Data readDataFromDb(std::u16string_view url);
+    void revokeEntryFromDb(std::u16string_view url);
+
+    Reference<registry::XSimpleRegistry> m_xCommonRDB;
+    Reference<registry::XSimpleRegistry> m_xNativeRDB;
+
+    void unorc_verify_init( Reference<XCommandEnvironment> const & xCmdEnv );
+    void unorc_flush( Reference<XCommandEnvironment> const & xCmdEnv );
+
+    Reference<XInterface> getObject( OUString const & id );
+    Reference<XInterface> insertObject(
+        OUString const & id, Reference<XInterface> const & xObject );
+    void releaseObject( OUString const & id );
+
+    void addToUnoRc( RcItem kind, OUString const & url,
+                     Reference<XCommandEnvironment> const & xCmdEnv );
+    void removeFromUnoRc( RcItem kind, OUString const & url,
+                          Reference<XCommandEnvironment> const & xCmdEnv );
+    bool hasInUnoRc( RcItem kind, OUString const & url );
+
+    css::uno::Reference< css::uno::XComponentContext > getRootContext() const;
+
+public:
+    BackendImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+    using PackageRegistryBackend::disposing;
+
+    //Will be called from ComponentPackageImpl
+    void initServiceRdbFiles();
+};
+
+
+BackendImpl::ComponentPackageImpl::ComponentPackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url, OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    OUString loader, bool bRemoved,
+    OUString const & identifier)
+    : Package( myBackend, url, name, name /* display-name */,
+               xPackageType, bRemoved, identifier),
+      m_loader(std::move( loader )),
+      m_registered( Reg::Uninit )
+{}
+
+Reference<registry::XSimpleRegistry>
+BackendImpl::ComponentPackageImpl::getRDB() const
+{
+    BackendImpl * that = getMyBackend();
+
+    //Late "initialization" of the services rdb files
+    //This is to prevent problems when running several
+    //instances of OOo with root rights in parallel. This
+    //would otherwise cause problems when copying the rdbs.
+    //See  http://qa.openoffice.org/issues/show_bug.cgi?id=99257
+    {
+        const ::osl::MutexGuard guard( m_aMutex );
+        if (!that->bSwitchedRdbFiles)
+        {
+            that->bSwitchedRdbFiles = true;
+            that->initServiceRdbFiles();
+        }
+    }
+    if ( m_loader == "com.sun.star.loader.SharedLibrary" )
+        return that->m_xNativeRDB;
+    else
+        return that->m_xCommonRDB;
+}
+
+BackendImpl * BackendImpl::ComponentPackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //Throws a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException(
+            "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<ComponentPackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+
+void BackendImpl::disposing()
+{
+    try {
+        m_backendObjects = t_string2object();
+        if (m_xNativeRDB.is()) {
+            m_xNativeRDB->close();
+            m_xNativeRDB.clear();
+        }
+        if (m_xCommonRDB.is()) {
+            m_xCommonRDB->close();
+            m_xCommonRDB.clear();
+        }
+        unorc_flush( Reference<XCommandEnvironment>() );
+
+        PackageRegistryBackend::disposing();
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        throw lang::WrappedTargetRuntimeException(
+            "caught unexpected exception while disposing...",
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+void BackendImpl::initServiceRdbFiles()
+{
+    const Reference<XCommandEnvironment> xCmdEnv;
+
+    ::ucbhelper::Content cacheDir( getCachePath(), xCmdEnv, m_xComponentContext );
+    ::ucbhelper::Content oldRDB;
+    // switch common rdb:
+    if (!m_commonRDB_orig.isEmpty())
+    {
+        (void)create_ucb_content(
+            &oldRDB, makeURL( getCachePath(), m_commonRDB_orig),
+            xCmdEnv, false /* no throw */ );
+    }
+    m_commonRDB = m_commonRDB_orig == "common.rdb" ? std::u16string_view(u"common_.rdb") : std::u16string_view(u"common.rdb");
+    if (oldRDB.get().is())
+    {
+        cacheDir.transferContent(
+                oldRDB, ::ucbhelper::InsertOperation::Copy,
+                m_commonRDB, NameClash::OVERWRITE );
+        oldRDB = ::ucbhelper::Content();
+    }
+    // switch native rdb:
+    if (!m_nativeRDB_orig.isEmpty())
+    {
+        (void)create_ucb_content(
+            &oldRDB, makeURL(getCachePath(), m_nativeRDB_orig),
+            xCmdEnv, false /* no throw */ );
+    }
+    const OUString plt_rdb( getPlatformString() + ".rdb" );
+    const OUString plt_rdb_( getPlatformString() + "_.rdb" );
+    m_nativeRDB = (m_nativeRDB_orig == plt_rdb ) ? plt_rdb_ : plt_rdb;
+    if (oldRDB.get().is())
+    {
+        cacheDir.transferContent(
+                oldRDB, ::ucbhelper::InsertOperation::Copy,
+                m_nativeRDB, NameClash::OVERWRITE );
+    }
+
+    // UNO is bootstrapped, flush for next process start:
+    m_unorc_modified = true;
+    unorc_flush( Reference<XCommandEnvironment>() );
+
+
+    // common rdb for java, native rdb for shared lib components
+    if (!m_commonRDB.isEmpty()) {
+        m_xCommonRDB.set(
+            m_xComponentContext->getServiceManager()
+            ->createInstanceWithContext(
+            "com.sun.star.registry.SimpleRegistry",
+            m_xComponentContext ), UNO_QUERY_THROW );
+        m_xCommonRDB->open(
+            makeURL( expandUnoRcUrl(getCachePath()), m_commonRDB ),
+            false, true);
+    }
+    if (!m_nativeRDB.isEmpty()) {
+        m_xNativeRDB.set(
+            m_xComponentContext->getServiceManager()
+            ->createInstanceWithContext(
+            "com.sun.star.registry.SimpleRegistry",
+            m_xComponentContext ), UNO_QUERY_THROW );
+        m_xNativeRDB->open(
+            makeURL( expandUnoRcUrl(getCachePath()), m_nativeRDB ),
+            false, true);
+    }
+}
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : PackageRegistryBackend( args, xComponentContext ),
+      m_unorc_inited( false ),
+      m_unorc_modified( false ),
+      bSwitchedRdbFiles(false),
+      m_xDynComponentTypeInfo( new Package::TypeInfo(
+             "application/vnd.sun.star.uno-component;type=native;platform=" +
+                                   getPlatformString(),
+                                   "*" SAL_DLLEXTENSION,
+                                   DpResId(RID_STR_DYN_COMPONENT)
+                                   ) ),
+      m_xJavaComponentTypeInfo( new Package::TypeInfo(
+             "application/vnd.sun.star.uno-component;type=Java",
+                                    "*.jar",
+                                    DpResId(RID_STR_JAVA_COMPONENT)
+                                    ) ),
+      m_xPythonComponentTypeInfo( new Package::TypeInfo(
+             "application/vnd.sun.star.uno-component;type=Python",
+                                      "*.py",
+                                      DpResId(
+                                          RID_STR_PYTHON_COMPONENT)
+                                      ) ),
+      m_xComponentsTypeInfo( new Package::TypeInfo(
+                                 "application/vnd.sun.star.uno-components",
+                                 "*.components",
+                                 DpResId(RID_STR_COMPONENTS)
+                                 ) ),
+      m_xRDBTypelibTypeInfo( new Package::TypeInfo(
+             "application/vnd.sun.star.uno-typelibrary;type=RDB",
+                                 "*.rdb",
+                                 DpResId(RID_STR_RDB_TYPELIB)
+                                 ) ),
+      m_xJavaTypelibTypeInfo( new Package::TypeInfo(
+             "application/vnd.sun.star.uno-typelibrary;type=Java",
+                                  "*.jar",
+                                  DpResId(RID_STR_JAVA_TYPELIB)
+                                  ) ),
+      m_typeInfos{ m_xDynComponentTypeInfo, m_xJavaComponentTypeInfo, m_xPythonComponentTypeInfo,
+                   m_xComponentsTypeInfo, m_xRDBTypelibTypeInfo, m_xJavaTypelibTypeInfo }
+{
+    const Reference<XCommandEnvironment> xCmdEnv;
+
+    if (transientMode())
+    {
+        // in-mem rdbs:
+        // common rdb for java, native rdb for shared lib components
+        m_xCommonRDB.set(
+            xComponentContext->getServiceManager()->createInstanceWithContext(
+                "com.sun.star.registry.SimpleRegistry",
+                xComponentContext ), UNO_QUERY_THROW );
+        m_xCommonRDB->open( OUString() /* in-mem */,
+                            false /* ! read-only */, true /* create */ );
+        m_xNativeRDB.set(
+            xComponentContext->getServiceManager()->createInstanceWithContext(
+                "com.sun.star.registry.SimpleRegistry",
+                xComponentContext ), UNO_QUERY_THROW );
+        m_xNativeRDB->open( OUString() /* in-mem */,
+                            false /* ! read-only */, true /* create */ );
+    }
+    else
+    {
+        unorc_verify_init( xCmdEnv );
+        OUString dbFile = makeURL(getCachePath(), "backenddb.xml");
+        m_backendDb.reset(
+            new ComponentBackendDb(getComponentContext(), dbFile));
+    }
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.component.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+void BackendImpl::addDataToDb(
+    OUString const & url, ComponentBackendDb::Data const & data)
+{
+    if (m_backendDb)
+        m_backendDb->addEntry(url, data);
+}
+
+ComponentBackendDb::Data BackendImpl::readDataFromDb(std::u16string_view url)
+{
+    ComponentBackendDb::Data data;
+    if (m_backendDb)
+        data = m_backendDb->getEntry(url);
+    return data;
+}
+
+void BackendImpl::revokeEntryFromDb(std::u16string_view url)
+{
+    if (m_backendDb)
+        m_backendDb->revokeEntry(url);
+}
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return m_typeInfos;
+}
+
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_,
+    bool bRemoved, OUString const & identifier,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    OUString mediaType(mediaType_);
+    if ( mediaType.isEmpty() || mediaType == "application/vnd.sun.star.uno-component" || mediaType == "application/vnd.sun.star.uno-typelibrary" )
+    {
+        // detect exact media-type:
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, url, xCmdEnv )) {
+            const OUString title( StrTitle::getTitle( ucbContent ) );
+            if (title.endsWithIgnoreAsciiCase(SAL_DLLEXTENSION))
+            {
+                mediaType = "application/vnd.sun.star.uno-component;type=native;platform=" +
+                    getPlatformString();
+            }
+            else if (title.endsWithIgnoreAsciiCase(".jar"))
+            {
+                if (jarManifestHeaderPresent(
+                        url, "RegistrationClassName", xCmdEnv ))
+                    mediaType = "application/vnd.sun.star.uno-component;type=Java";
+                if (mediaType.isEmpty())
+                    mediaType = "application/vnd.sun.star.uno-typelibrary;type=Java";
+            }
+            else if (title.endsWithIgnoreAsciiCase(".py"))
+                mediaType = "application/vnd.sun.star.uno-component;type=Python";
+            else if (title.endsWithIgnoreAsciiCase(".rdb"))
+                mediaType = "application/vnd.sun.star.uno-typelibrary;type=RDB";
+        }
+        if (mediaType.isEmpty())
+            throw lang::IllegalArgumentException(
+                StrCannotDetectMediaType() + url,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            OUString name;
+            if (!bRemoved)
+            {
+                ::ucbhelper::Content ucbContent( url, xCmdEnv, m_xComponentContext );
+                name = StrTitle::getTitle( ucbContent );
+            }
+
+            if (subType.equalsIgnoreAsciiCase("vnd.sun.star.uno-component"))
+            {
+                // xxx todo: probe and evaluate component xml description
+
+                auto const iter = params.find(OString("platform"));
+                bool bPlatformFits(iter == params.end());
+                OUString aPlatform;
+                if (!bPlatformFits) // platform is specified, we have to check
+                {
+                    aPlatform = iter->second.m_sValue;
+                    bPlatformFits = platform_fits(aPlatform);
+                }
+                // If the package is being removed, do not care whether
+                // platform fits. We won't be using it anyway.
+                if (bPlatformFits || bRemoved) {
+                    auto const iterType = params.find(OString("type"));
+                    if (iterType != params.end())
+                    {
+                        OUString const & value = iterType->second.m_sValue;
+                        if (value.equalsIgnoreAsciiCase("native")) {
+                            if (bPlatformFits)
+                                return new BackendImpl::ComponentPackageImpl(
+                                    this, url, name, m_xDynComponentTypeInfo,
+                                    "com.sun.star.loader.SharedLibrary",
+                                    bRemoved, identifier);
+                            else
+                                return new BackendImpl::OtherPlatformPackageImpl(
+                                    this, url, name, m_xDynComponentTypeInfo,
+                                    bRemoved, identifier, aPlatform);
+                        }
+                        if (value.equalsIgnoreAsciiCase("Java")) {
+                            return new BackendImpl::ComponentPackageImpl(
+                                this, url, name, m_xJavaComponentTypeInfo,
+                                "com.sun.star.loader.Java2",
+                                bRemoved, identifier);
+                        }
+                        if (value.equalsIgnoreAsciiCase("Python")) {
+                            return new BackendImpl::ComponentPackageImpl(
+                                this, url, name, m_xPythonComponentTypeInfo,
+                                "com.sun.star.loader.Python",
+                                bRemoved, identifier);
+                        }
+                    }
+                }
+            }
+            else if (subType.equalsIgnoreAsciiCase("vnd.sun.star.uno-components"))
+            {
+                auto const iter = params.find(OString("platform"));
+                if (iter == params.end() || platform_fits(iter->second.m_sValue)) {
+                    return new BackendImpl::ComponentsPackageImpl(
+                        this, url, name, m_xComponentsTypeInfo, bRemoved,
+                        identifier);
+                }
+            }
+            else if (subType.equalsIgnoreAsciiCase( "vnd.sun.star.uno-typelibrary"))
+            {
+                auto const iter = params.find(OString("type"));
+                if (iter != params.end()) {
+                    OUString const & value = iter->second.m_sValue;
+                    if (value.equalsIgnoreAsciiCase("RDB"))
+                    {
+                        return new BackendImpl::TypelibraryPackageImpl(
+                            this, url, name, m_xRDBTypelibTypeInfo,
+                            false /* rdb */, bRemoved, identifier);
+                    }
+                    if (value.equalsIgnoreAsciiCase("Java")) {
+                        return new BackendImpl::TypelibraryPackageImpl(
+                            this, url, name, m_xJavaTypelibTypeInfo,
+                            true /* jar */, bRemoved, identifier);
+                    }
+                }
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+
+void BackendImpl::unorc_verify_init(
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (transientMode())
+        return;
+    const ::osl::MutexGuard guard( m_aMutex );
+    if ( m_unorc_inited)
+        return;
+
+    // common rc:
+    ::ucbhelper::Content ucb_content;
+    if (create_ucb_content(
+            &ucb_content,
+            makeURL( getCachePath(), "unorc" ),
+            xCmdEnv, false /* no throw */ ))
+    {
+        OUString line;
+        if (readLine( &line, "UNO_JAVA_CLASSPATH=", ucb_content,
+                      RTL_TEXTENCODING_UTF8 ))
+        {
+            sal_Int32 index = sizeof ("UNO_JAVA_CLASSPATH=") - 1;
+            do {
+                OUString token( o3tl::trim(o3tl::getToken(line, 0, ' ', index )) );
+                if (!token.isEmpty())
+                {
+                    if (create_ucb_content(
+                            nullptr, expandUnoRcTerm(token), xCmdEnv,
+                            false /* no throw */ ))
+                    {
+                        //The jar file may not exist anymore if a shared or bundled
+                        //extension was removed, but it can still be in the unorc
+                        //After running XExtensionManager::synchronize, the unorc is
+                        //cleaned up
+                        m_jar_typelibs.push_back( token );
+                    }
+                }
+            }
+            while (index >= 0);
+        }
+        if (readLine( &line, "UNO_TYPES=", ucb_content,
+                      RTL_TEXTENCODING_UTF8 )) {
+            sal_Int32 index = sizeof ("UNO_TYPES=") - 1;
+            do {
+                OUString token( o3tl::trim(o3tl::getToken(line, 0, ' ', index )) );
+                if (!token.isEmpty())
+                {
+                    if (token[ 0 ] == '?')
+                        token = token.copy( 1 );
+                    if (create_ucb_content(
+                            nullptr, expandUnoRcTerm(token), xCmdEnv,
+                            false /* no throw */ ))
+                    {
+                         //The RDB file may not exist anymore if a shared or bundled
+                         //extension was removed, but it can still be in the unorc.
+                         //After running XExtensionManager::synchronize, the unorc is
+                         //cleaned up
+                         m_rdb_typelibs.push_back( token );
+                    }
+                }
+            }
+            while (index >= 0);
+        }
+        if (readLine( &line, "UNO_SERVICES=", ucb_content,
+                      RTL_TEXTENCODING_UTF8 ))
+        {
+            // The UNO_SERVICES line always has the BNF form
+            //  "UNO_SERVICES="
+            //  ("?$ORIGIN/" <common-rdb>)?                        -- first
+            //  "${$ORIGIN/${_OS}_${_ARCH}rc:UNO_SERVICES}"?       -- second
+            //  ("?" ("BUNDLED_EXTENSIONS" |                       -- third
+            //   "UNO_SHARED_PACKAGES_CACHE" | "UNO_USER_PACKAGES_CACHE")
+            //   ...)*
+            // so can unambiguously be split into its three parts:
+            int state = 1;
+            for (sal_Int32 i = RTL_CONSTASCII_LENGTH("UNO_SERVICES=");
+                 i >= 0;)
+            {
+                OUString token(line.getToken(0, ' ', i));
+                if (!token.isEmpty())
+                {
+                    if (state == 1 && token.match("?$ORIGIN/"))
+                    {
+                        m_commonRDB_orig = token.copy(
+                            RTL_CONSTASCII_LENGTH("?$ORIGIN/"));
+                        state = 2;
+                    }
+                    else if ( state <= 2 && token == "${$ORIGIN/${_OS}_${_ARCH}rc:UNO_SERVICES}" )
+                    {
+                        state = 3;
+                    }
+                    else
+                    {
+                        if (token[0] == '?')
+                        {
+                            token = token.copy(1);
+                        }
+                        m_components.push_back(token);
+                        state = 3;
+                    }
+                }
+            }
+        }
+
+        // native rc:
+        if (create_ucb_content(
+                &ucb_content,
+                makeURL( getCachePath(), getPlatformString() + "rc"),
+                xCmdEnv, false /* no throw */ )) {
+            if (readLine( &line, "UNO_SERVICES=", ucb_content,
+                          RTL_TEXTENCODING_UTF8 )) {
+                m_nativeRDB_orig = line.copy(
+                    sizeof ("UNO_SERVICES=?$ORIGIN/") - 1 );
+            }
+        }
+    }
+    m_unorc_modified = false;
+    m_unorc_inited = true;
+}
+
+
+void BackendImpl::unorc_flush( Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (transientMode())
+        return;
+    if (!m_unorc_inited || !m_unorc_modified)
+        return;
+
+    OStringBuffer buf;
+
+    buf.append("ORIGIN=");
+    OUString sOrigin = dp_misc::makeRcTerm(m_cachePath);
+    OString osOrigin = OUStringToOString(sOrigin, RTL_TEXTENCODING_UTF8);
+    buf.append(osOrigin);
+    buf.append(LF);
+
+    if (! m_jar_typelibs.empty())
+    {
+        auto iPos( m_jar_typelibs.cbegin() );
+        auto const iEnd( m_jar_typelibs.cend() );
+        buf.append( "UNO_JAVA_CLASSPATH=" );
+        while (iPos != iEnd) {
+            // encoded ASCII file-urls:
+            const OString item(
+                OUStringToOString( *iPos, RTL_TEXTENCODING_ASCII_US ) );
+            buf.append( item );
+            ++iPos;
+            if (iPos != iEnd)
+                buf.append( ' ' );
+        }
+        buf.append(LF);
+    }
+    if (! m_rdb_typelibs.empty())
+    {
+        auto iPos( m_rdb_typelibs.cbegin() );
+        auto const iEnd( m_rdb_typelibs.cend() );
+        buf.append( "UNO_TYPES=" );
+        while (iPos != iEnd) {
+            buf.append( '?' );
+            // encoded ASCII file-urls:
+            const OString item(
+                OUStringToOString( *iPos, RTL_TEXTENCODING_ASCII_US ) );
+            buf.append( item );
+            ++iPos;
+            if (iPos != iEnd)
+                buf.append( ' ' );
+        }
+        buf.append(LF);
+    }
+
+    // If we duplicated the common or native rdb then we must use those urls
+    //otherwise we use those of the original files. That is, m_commonRDB_orig
+    //and m_nativeRDB_orig;
+    OUString sCommonRDB(m_commonRDB.isEmpty() ? m_commonRDB_orig : m_commonRDB );
+    OUString sNativeRDB(m_nativeRDB.isEmpty() ? m_nativeRDB_orig : m_nativeRDB );
+
+    if (!sCommonRDB.isEmpty() || !sNativeRDB.isEmpty() ||
+        !m_components.empty())
+    {
+        buf.append( "UNO_SERVICES=" );
+        bool space = false;
+        if (!sCommonRDB.isEmpty())
+        {
+            buf.append( "?$ORIGIN/" );
+            buf.append( OUStringToOString(
+                            sCommonRDB, RTL_TEXTENCODING_ASCII_US ) );
+            space = true;
+        }
+        if (!sNativeRDB.isEmpty())
+        {
+            if (space)
+            {
+                buf.append(' ');
+            }
+            buf.append( "${$ORIGIN/${_OS}_${_ARCH}rc:UNO_SERVICES}" );
+            space = true;
+
+            // write native rc:
+            OString buf2 =
+                "ORIGIN=" +
+                osOrigin +
+                OStringChar(LF) +
+                "UNO_SERVICES=?$ORIGIN/"  +
+                OUStringToOString( sNativeRDB, RTL_TEXTENCODING_ASCII_US ) +
+                OStringChar(LF);
+
+            const Reference<io::XInputStream> xData(
+                ::xmlscript::createInputStream(
+                        reinterpret_cast<sal_Int8 const *>(buf2.getStr()),
+                        buf2.getLength() ) );
+            ::ucbhelper::Content ucb_content(
+                makeURL( getCachePath(), getPlatformString() + "rc" ),
+                xCmdEnv, m_xComponentContext );
+            ucb_content.writeStream( xData, true /* replace existing */ );
+        }
+        for (auto const& component : m_components)
+        {
+            if (space)
+            {
+                buf.append(' ');
+            }
+            buf.append('?');
+            buf.append(OUStringToOString(component, RTL_TEXTENCODING_UTF8));
+            space = true;
+        }
+        buf.append(LF);
+    }
+
+    // write unorc:
+    const Reference<io::XInputStream> xData(
+        ::xmlscript::createInputStream(
+                reinterpret_cast<sal_Int8 const *>(buf.getStr()),
+                buf.getLength() ) );
+    ::ucbhelper::Content ucb_content(
+        makeURL( getCachePath(), "unorc" ), xCmdEnv, m_xComponentContext );
+    ucb_content.writeStream( xData, true /* replace existing */ );
+
+    m_unorc_modified = false;
+}
+
+
+void BackendImpl::addToUnoRc( RcItem kind, OUString const & url_,
+                              Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    const OUString rcterm( dp_misc::makeRcTerm(url_) );
+    const ::osl::MutexGuard guard( m_aMutex );
+    unorc_verify_init( xCmdEnv );
+    std::deque<OUString> & rSet = getRcItemList(kind);
+    if (std::find( rSet.begin(), rSet.end(), rcterm ) == rSet.end()) {
+        rSet.push_front( rcterm ); // prepend to list, thus overriding
+        // write immediately:
+        m_unorc_modified = true;
+        unorc_flush( xCmdEnv );
+    }
+}
+
+
+void BackendImpl::removeFromUnoRc(
+    RcItem kind, OUString const & url_,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    const OUString rcterm( dp_misc::makeRcTerm(url_) );
+    const ::osl::MutexGuard guard( m_aMutex );
+    unorc_verify_init( xCmdEnv );
+    std::deque<OUString> & aRcItemList = getRcItemList(kind);
+    aRcItemList.erase(std::remove(aRcItemList.begin(), aRcItemList.end(), rcterm), aRcItemList.end());
+    // write immediately:
+    m_unorc_modified = true;
+    unorc_flush( xCmdEnv );
+}
+
+
+bool BackendImpl::hasInUnoRc(
+    RcItem kind, OUString const & url_ )
+{
+    const OUString rcterm( dp_misc::makeRcTerm(url_) );
+    const ::osl::MutexGuard guard( m_aMutex );
+    std::deque<OUString> const & rSet = getRcItemList(kind);
+    return std::find( rSet.begin(), rSet.end(), rcterm ) != rSet.end();
+}
+
+css::uno::Reference< css::uno::XComponentContext > BackendImpl::getRootContext()
+    const
+{
+    css::uno::Reference< css::uno::XComponentContext > rootContext(
+        getComponentContext()->getValueByName("_root"),
+        css::uno::UNO_QUERY);
+    return rootContext.is() ? rootContext : getComponentContext();
+}
+
+
+void BackendImpl::releaseObject( OUString const & id )
+{
+    const ::osl::MutexGuard guard( m_aMutex );
+    m_backendObjects.erase( id );
+}
+
+
+Reference<XInterface> BackendImpl::getObject( OUString const & id )
+{
+    const ::osl::MutexGuard guard( m_aMutex );
+    const t_string2object::const_iterator iFind( m_backendObjects.find( id ) );
+    if (iFind == m_backendObjects.end())
+        return Reference<XInterface>();
+    else
+        return iFind->second;
+}
+
+
+Reference<XInterface> BackendImpl::insertObject(
+    OUString const & id, Reference<XInterface> const & xObject )
+{
+    const ::osl::MutexGuard guard( m_aMutex );
+    const std::pair<t_string2object::iterator, bool> insertion(
+        m_backendObjects.emplace( id, xObject ) );
+    return insertion.first->second;
+}
+
+
+Reference<XComponentContext> raise_uno_process(
+    Reference<XComponentContext> const & xContext,
+    ::rtl::Reference<AbortChannel> const & abortChannel )
+{
+    OSL_ASSERT( xContext.is() );
+
+    OUString url( util::theMacroExpander::get(xContext)->expandMacros( "$URE_BIN_DIR/uno" ) );
+
+    const OUString connectStr = "uno:pipe,name=" + generateRandomPipeId() + ";urp;uno.ComponentContext";
+
+    // raise core UNO process to register/run a component,
+    // javavm service uses unorc next to executable to retrieve deployed
+    // jar typelibs
+
+    std::vector<OUString> args{
+#if OSL_DEBUG_LEVEL == 0
+        "--quiet",
+#endif
+        "--singleaccept",
+        "-u",
+        connectStr,
+        // don't inherit from unorc:
+        "-env:INIFILENAME=" };
+
+    //now add the bootstrap variables which were supplied on the command line
+    std::vector<OUString> bootvars = getCmdBootstrapVariables();
+    args.insert(args.end(), bootvars.begin(), bootvars.end());
+
+    oslProcess hProcess;
+    try {
+        hProcess = raiseProcess(
+            url, comphelper::containerToSequence(args) );
+    }
+    catch (...) {
+        OUStringBuffer sMsg = "error starting process: " + url;
+        for(const auto& arg : args)
+            sMsg.append(" " + arg);
+        throw uno::RuntimeException(sMsg.makeStringAndClear());
+    }
+    try {
+        return Reference<XComponentContext>(
+            resolveUnoURL( connectStr, xContext, abortChannel.get() ),
+            UNO_QUERY_THROW );
+    }
+    catch (...) {
+        // try to terminate process:
+        if ( osl_terminateProcess( hProcess ) != osl_Process_E_None )
+        {
+            OSL_ASSERT( false );
+        }
+        throw;
+    }
+}
+
+void extractComponentData(
+    css::uno::Reference< css::uno::XComponentContext > const & context,
+    css::uno::Reference< css::registry::XRegistryKey > const & registry,
+    ComponentBackendDb::Data * data,
+    std::vector< css::uno::Reference< css::uno::XInterface > > * factories,
+    css::uno::Reference< css::loader::XImplementationLoader > const &
+        componentLoader,
+    OUString const & componentUrl)
+{
+    OSL_ASSERT(
+        context.is() && registry.is() && data != nullptr && componentLoader.is());
+    OUString registryName(registry->getKeyName());
+    sal_Int32 prefix = registryName.getLength();
+    if (!registryName.endsWith("/")) {
+        prefix += RTL_CONSTASCII_LENGTH("/");
+    }
+    const css::uno::Sequence< css::uno::Reference< css::registry::XRegistryKey > >
+        keys(registry->openKeys());
+    css::uno::Reference< css::lang::XMultiComponentFactory > smgr(
+        context->getServiceManager(), css::uno::UNO_SET_THROW);
+    for (css::uno::Reference< css::registry::XRegistryKey > const & key : keys) {
+        OUString name(key->getKeyName().copy(prefix));
+        data->implementationNames.push_back(name);
+        css::uno::Reference< css::registry::XRegistryKey > singletons(
+            key->openKey("UNO/SINGLETONS"));
+        if (singletons.is()) {
+            sal_Int32 prefix2 = key->getKeyName().getLength() +
+                RTL_CONSTASCII_LENGTH("/UNO/SINGLETONS/");
+            const css::uno::Sequence<
+                css::uno::Reference< css::registry::XRegistryKey > >
+                singletonKeys(singletons->openKeys());
+            for (css::uno::Reference< css::registry::XRegistryKey > const & singletonKey : singletonKeys) {
+                data->singletons.emplace_back(
+                        singletonKey->getKeyName().copy(prefix2), name);
+            }
+        }
+        if (factories != nullptr) {
+            factories->push_back(
+                componentLoader->activate(
+                    name, OUString(), componentUrl, key));
+        }
+    }
+}
+
+void BackendImpl::ComponentPackageImpl::getComponentInfo(
+    ComponentBackendDb::Data * data,
+    std::vector< css::uno::Reference< css::uno::XInterface > > * factories,
+    Reference<XComponentContext> const & xContext )
+{
+    const Reference<loader::XImplementationLoader> xLoader(
+        xContext->getServiceManager()->createInstanceWithContext(
+            m_loader, xContext ), UNO_QUERY );
+    if (! xLoader.is())
+    {
+        throw css::deployment::DeploymentException(
+            "cannot instantiate loader " + m_loader,
+            static_cast< OWeakObject * >(this), Any());
+    }
+
+    // HACK: highly dependent on stoc/source/servicemanager
+    //       and stoc/source/implreg implementation which rely on the same
+    //       services.rdb format!
+    //       .../UNO/LOCATION and .../UNO/ACTIVATOR appear not to be written by
+    //       writeRegistryInfo, however, but are known, fixed values here, so
+    //       can be passed into extractComponentData
+    OUString url(getURL());
+    const Reference<registry::XSimpleRegistry> xMemReg(
+        xContext->getServiceManager()->createInstanceWithContext(
+            "com.sun.star.registry.SimpleRegistry", xContext ),
+        UNO_QUERY_THROW );
+    xMemReg->open( OUString() /* in mem */, false, true );
+    xLoader->writeRegistryInfo( xMemReg->getRootKey(), OUString(), url );
+    extractComponentData(
+        xContext, xMemReg->getRootKey(), data, factories, xLoader, url);
+}
+
+void BackendImpl::ComponentPackageImpl::componentLiveInsertion(
+    ComponentBackendDb::Data const & data,
+    std::vector< css::uno::Reference< css::uno::XInterface > > const &
+        factories)
+{
+    css::uno::Reference< css::uno::XComponentContext > rootContext(
+        getMyBackend()->getRootContext());
+    css::uno::Reference< css::container::XSet > set(
+        rootContext->getServiceManager(), css::uno::UNO_QUERY_THROW);
+    std::vector< css::uno::Reference< css::uno::XInterface > >::const_iterator
+        factory(factories.begin());
+    for (auto const& implementationName : data.implementationNames)
+    {
+        try {
+            set->insert(css::uno::Any(*factory++));
+        } catch (const container::ElementExistException &) {
+            SAL_WARN("desktop.deployment", "implementation already registered " << implementationName);
+        }
+    }
+    if (data.singletons.empty())        return;
+
+    css::uno::Reference< css::container::XNameContainer > cont(
+        rootContext, css::uno::UNO_QUERY_THROW);
+    for (auto const& singleton : data.singletons)
+    {
+        OUString name("/singletons/" + singleton.first);
+        //TODO: Update should be atomic:
+        try {
+            cont->removeByName( name + "/arguments");
+        } catch (const container::NoSuchElementException &) {}
+        try {
+            cont->insertByName( name + "/service", css::uno::Any(singleton.second));
+        } catch (const container::ElementExistException &) {
+            cont->replaceByName( name + "/service", css::uno::Any(singleton.second));
+        }
+        try {
+            cont->insertByName(name, css::uno::Any());
+        } catch (const container::ElementExistException &) {
+            SAL_WARN("desktop.deployment", "singleton already registered " << singleton.first);
+            cont->replaceByName(name, css::uno::Any());
+        }
+    }
+}
+
+void BackendImpl::ComponentPackageImpl::componentLiveRemoval(
+    ComponentBackendDb::Data const & data)
+{
+    css::uno::Reference< css::uno::XComponentContext > rootContext(
+        getMyBackend()->getRootContext());
+    css::uno::Reference< css::container::XSet > set(
+        rootContext->getServiceManager(), css::uno::UNO_QUERY_THROW);
+    for (auto const& implementationName : data.implementationNames)
+    {
+        try {
+            set->remove(css::uno::Any(implementationName));
+        } catch (const css::container::NoSuchElementException &) {
+            // ignore if factory has not been live deployed
+        }
+    }
+    if (data.singletons.empty())
+        return;
+
+    css::uno::Reference< css::container::XNameContainer > cont(
+        rootContext, css::uno::UNO_QUERY_THROW);
+    for (auto const& singleton : data.singletons)
+    {
+        OUString name("/singletons/" + singleton.first);
+        //TODO: Removal should be atomic:
+        try {
+            cont->removeByName(name);
+        } catch (const container::NoSuchElementException &) {}
+        try {
+            cont->removeByName( name + "/service" );
+        } catch (const container::NoSuchElementException &) {}
+        try {
+            cont->removeByName( name + "/arguments" );
+        } catch (const container::NoSuchElementException &) {}
+    }
+}
+
+// Package
+
+//We could use here BackendImpl::hasActiveEntry. However, this check is just as well.
+//And it also shows the problem if another extension has overwritten an implementation
+//entry, because it contains the same service implementation
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::ComponentPackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<XCommandEnvironment> const & )
+{
+    if (m_registered == Reg::Uninit)
+    {
+        m_registered = Reg::NotRegistered;
+        const Reference<registry::XSimpleRegistry> xRDB( getRDB() );
+        if (xRDB.is())
+        {
+            bool bAmbiguousComponentName = false;
+            // lookup rdb for location URL:
+            const Reference<registry::XRegistryKey> xRootKey(
+                xRDB->getRootKey() );
+            const Reference<registry::XRegistryKey> xImplKey(
+                xRootKey->openKey( "IMPLEMENTATIONS" ) );
+            Sequence<OUString> implNames;
+            if (xImplKey.is() && xImplKey->isValid())
+                implNames = xImplKey->getKeyNames();
+            OUString const * pImplNames = implNames.getConstArray();
+            sal_Int32 pos = implNames.getLength();
+            for ( ; pos--; )
+            {
+                checkAborted( abortChannel );
+                const OUString key(
+                    pImplNames[ pos ] + "/UNO/LOCATION" );
+                const Reference<registry::XRegistryKey> xKey(
+                    xRootKey->openKey(key) );
+                if (xKey.is() && xKey->isValid())
+                {
+                    const OUString location( xKey->getAsciiValue() );
+                    if (location.equalsIgnoreAsciiCase( getURL() ))
+                    {
+                        break;
+                    }
+                    else
+                    {
+                        //try to match only the file name
+                        OUString thisUrl(getURL());
+                        std::u16string_view thisFileName(thisUrl.subView(thisUrl.lastIndexOf('/')));
+
+                        std::u16string_view locationFileName(location.subView(location.lastIndexOf('/')));
+                        if (o3tl::equalsIgnoreAsciiCase(locationFileName, thisFileName))
+                            bAmbiguousComponentName = true;
+                    }
+                }
+            }
+            if (pos >= 0)
+                m_registered = Reg::Registered;
+            else if (bAmbiguousComponentName)
+                m_registered = Reg::MaybeRegistered;
+        }
+    }
+
+    //Different extensions can use the same service implementations. Then the extensions
+    //which was installed last will overwrite the one from the other extension. That is
+    //the registry will contain the path (the location) of the library or jar of the
+    //second extension. In this case isRegistered called for the lib of the first extension
+    //would return "not registered". That would mean that during uninstallation
+    //XPackage::registerPackage is not called, because it just was not registered. This is,
+    //however, necessary for jar files. Registering and unregistering update
+    //uno_packages/cache/registry/com.sun.star.comp.deployment.component.PackageRegistryBackend/unorc
+    //Therefore, we will return always "is ambiguous" if the path of this component cannot
+    //be found in the registry and if there is another path and both have the same file name (but
+    //the rest of the path is different).
+    //If the caller cannot precisely determine that this package was registered, then it must
+    //call registerPackage.
+    bool bAmbiguous = m_registered == Reg::Void // Reg::Void == we are in the progress of unregistration
+        || m_registered == Reg::MaybeRegistered;
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true /* IsPresent */,
+        beans::Ambiguous<sal_Bool>(
+            m_registered == Reg::Registered, bAmbiguous) );
+}
+
+
+void BackendImpl::ComponentPackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool startup,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    BackendImpl * that = getMyBackend();
+    OUString url(getURL());
+    if (doRegisterPackage) {
+        ComponentBackendDb::Data data;
+        css::uno::Reference< css::uno::XComponentContext > context;
+        if (startup) {
+            context = that->getComponentContext();
+        } else {
+            context.set(that->getObject(url), css::uno::UNO_QUERY);
+            if (!context.is()) {
+                context.set(
+                    that->insertObject(
+                        url,
+                        raise_uno_process(
+                            that->getComponentContext(), abortChannel)),
+                    css::uno::UNO_QUERY_THROW);
+            }
+        }
+        css::uno::Reference< css::registry::XImplementationRegistration> impreg(
+            context->getServiceManager()->createInstanceWithContext(
+                "com.sun.star.registry.ImplementationRegistration",
+                context),
+            css::uno::UNO_QUERY_THROW);
+        css::uno::Reference< css::registry::XSimpleRegistry > rdb(getRDB());
+        impreg->registerImplementation(m_loader, url, rdb);
+        // Only write to unorc after successful registration; it may fail if
+        // there is no suitable java
+        if (m_loader == "com.sun.star.loader.Java2" && !jarManifestHeaderPresent(url, "UNO-Type-Path", xCmdEnv))
+        {
+            that->addToUnoRc(RCITEM_JAR_TYPELIB, url, xCmdEnv);
+            data.javaTypeLibrary = true;
+        }
+        std::vector< css::uno::Reference< css::uno::XInterface > > factories;
+        getComponentInfo(&data, startup ? nullptr : &factories, context);
+        if (!startup) {
+            try {
+                componentLiveInsertion(data, factories);
+            } catch (css::uno::Exception &) {
+                TOOLS_INFO_EXCEPTION("desktop.deployment", "caught");
+                try {
+                    impreg->revokeImplementation(url, rdb);
+                } catch (css::uno::RuntimeException &) {
+                    TOOLS_WARN_EXCEPTION("desktop.deployment", "ignored");
+                }
+                throw;
+            }
+        }
+        m_registered = Reg::Registered;
+        that->addDataToDb(url, data);
+    } else { // revoke
+        m_registered = Reg::Void;
+        ComponentBackendDb::Data data(that->readDataFromDb(url));
+        css::uno::Reference< css::uno::XComponentContext > context(
+            that->getObject(url), css::uno::UNO_QUERY);
+        bool remoteContext = context.is();
+        if (!remoteContext) {
+            context = that->getComponentContext();
+        }
+        if (!startup) {
+            componentLiveRemoval(data);
+        }
+        css::uno::Reference< css::registry::XImplementationRegistration >(
+            context->getServiceManager()->createInstanceWithContext(
+                "com.sun.star.registry.ImplementationRegistration",
+                context),
+            css::uno::UNO_QUERY_THROW)->revokeImplementation(url, getRDB());
+        if (data.javaTypeLibrary) {
+            that->removeFromUnoRc(RCITEM_JAR_TYPELIB, url, xCmdEnv);
+        }
+        if (remoteContext) {
+            that->releaseObject(url);
+        }
+        m_registered = Reg::NotRegistered;
+        getMyBackend()->revokeEntryFromDb(url);
+    }
+}
+
+BackendImpl::TypelibraryPackageImpl::TypelibraryPackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url, OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    bool jarFile, bool bRemoved, OUString const & identifier)
+    : Package( myBackend, url, name, name /* display-name */,
+               xPackageType, bRemoved, identifier),
+      m_jarFile( jarFile )
+{
+}
+
+// Package
+BackendImpl * BackendImpl::TypelibraryPackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException( "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<TypelibraryPackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::TypelibraryPackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    BackendImpl * that = getMyBackend();
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true /* IsPresent */,
+        beans::Ambiguous<sal_Bool>(
+            that->hasInUnoRc(
+                m_jarFile ? RCITEM_JAR_TYPELIB : RCITEM_RDB_TYPELIB, getURL() ),
+            false /* IsAmbiguous */ ) );
+}
+
+
+void BackendImpl::TypelibraryPackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool /*startup*/,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    BackendImpl * that = getMyBackend();
+    const OUString url( getURL() );
+
+    if (doRegisterPackage)
+    {
+        // live insertion:
+        if (m_jarFile) {
+            // xxx todo add to classpath at runtime: ???
+            //SB: It is probably not worth it to add the live inserted type
+            // library JAR to the UnoClassLoader in the soffice process.  Any
+            // live inserted component JAR that might reference this type
+            // library JAR runs in its own uno process, so there is probably no
+            // Java code in the soffice process that would see any UNO types
+            // introduced by this type library JAR.
+        }
+        else // RDB:
+        {
+            css::uno::Reference< css::container::XSet >(
+                that->getComponentContext()->getValueByName(
+                    "/singletons"
+                    "/com.sun.star.reflection.theTypeDescriptionManager"),
+                css::uno::UNO_QUERY_THROW)->insert(
+                    css::uno::Any(expandUnoRcUrl(url)));
+        }
+
+        that->addToUnoRc( m_jarFile ? RCITEM_JAR_TYPELIB : RCITEM_RDB_TYPELIB,
+                          url, xCmdEnv );
+    }
+    else // revokePackage()
+    {
+        that->removeFromUnoRc(
+            m_jarFile ? RCITEM_JAR_TYPELIB : RCITEM_RDB_TYPELIB, url, xCmdEnv );
+
+        // revoking types at runtime, possible, sensible?
+        if (!m_jarFile) {
+            css::uno::Reference< css::container::XSet >(
+                that->getComponentContext()->getValueByName(
+                    "/singletons"
+                    "/com.sun.star.reflection.theTypeDescriptionManager"),
+                css::uno::UNO_QUERY_THROW)->remove(
+                    css::uno::Any(expandUnoRcUrl(url)));
+        }
+    }
+}
+
+BackendImpl::OtherPlatformPackageImpl::OtherPlatformPackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url, OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    bool bRemoved, OUString const & identifier, OUString platform)
+    : Package(myBackend, url, name, name, xPackageType, bRemoved, identifier)
+    , m_aPlatform(std::move(platform))
+{
+    OSL_PRECOND(bRemoved, "this class can only be used for removing packages!");
+}
+
+BackendImpl *
+BackendImpl::OtherPlatformPackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //Throws a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException("Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<OtherPlatformPackageImpl*>(this)));
+    }
+    return pBackend;
+}
+
+Reference<registry::XSimpleRegistry>
+BackendImpl::OtherPlatformPackageImpl::impl_openRDB() const
+{
+    OUString const aRDB(m_aPlatform + ".rdb");
+    OUString const aRDBPath(makeURL(getMyBackend()->getCachePath(), aRDB));
+
+    Reference<registry::XSimpleRegistry> xRegistry;
+
+    try
+    {
+        xRegistry.set(
+                impl_createInstance("com.sun.star.registry.SimpleRegistry"),
+                UNO_QUERY)
+            ;
+        if (xRegistry.is())
+            xRegistry->open(expandUnoRcUrl(aRDBPath), false, false);
+    }
+    catch (registry::InvalidRegistryException const&)
+    {
+        // If the registry does not exist, we do not need to bother at all
+        xRegistry.set(nullptr);
+    }
+
+    SAL_WARN_IF( !xRegistry.is(), "desktop.deployment", "could not create registry for the package's platform");
+    return xRegistry;
+}
+
+Reference<XInterface>
+BackendImpl::OtherPlatformPackageImpl::impl_createInstance(OUString const& rService)
+const
+{
+    Reference<XComponentContext> const xContext(getMyBackend()->getComponentContext());
+    OSL_ASSERT(xContext.is());
+    Reference<XInterface> xService;
+    if (xContext.is())
+        xService.set(xContext->getServiceManager()->createInstanceWithContext(rService, xContext));
+    return xService;
+}
+
+beans::Optional<beans::Ambiguous<sal_Bool> >
+BackendImpl::OtherPlatformPackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard& /* guard */,
+    ::rtl::Reference<AbortChannel> const& /* abortChannel */,
+    Reference<XCommandEnvironment> const& /* xCmdEnv */ )
+{
+    return beans::Optional<beans::Ambiguous<sal_Bool> >(true,
+            beans::Ambiguous<sal_Bool>(true, false));
+}
+
+void
+BackendImpl::OtherPlatformPackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard& /* guard */,
+    bool bRegisterPackage,
+    bool /* bStartup */,
+    ::rtl::Reference<AbortChannel> const& /* abortChannel */,
+    Reference<XCommandEnvironment> const& /* xCmdEnv */)
+{
+    OSL_PRECOND(!bRegisterPackage, "this class can only be used for removing packages!");
+
+    OUString const aURL(getURL());
+
+    Reference<registry::XSimpleRegistry> const xServicesRDB(impl_openRDB());
+    Reference<registry::XImplementationRegistration> const xImplReg(
+            impl_createInstance("com.sun.star.registry.ImplementationRegistration"),
+            UNO_QUERY)
+        ;
+    if (xImplReg.is() && xServicesRDB.is())
+        xImplReg->revokeImplementation(aURL, xServicesRDB);
+    if (xServicesRDB.is())
+        xServicesRDB->close();
+
+    getMyBackend()->revokeEntryFromDb(aURL);
+}
+
+BackendImpl * BackendImpl::ComponentsPackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //Throws a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException("Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<ComponentsPackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::ComponentsPackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true,
+        beans::Ambiguous<sal_Bool>(
+            getMyBackend()->hasInUnoRc(RCITEM_COMPONENTS, getURL()), false));
+}
+
+void BackendImpl::ComponentsPackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool startup,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    BackendImpl * that = getMyBackend();
+    OUString url(getURL());
+    if (doRegisterPackage) {
+        if (!startup) {
+            css::uno::Reference< css::uno::XComponentContext > context(
+                that->getObject(url), css::uno::UNO_QUERY);
+            if (!context.is()) {
+                context.set(
+                    that->insertObject(
+                        url,
+                        raise_uno_process(
+                            that->getComponentContext(), abortChannel)),
+                    css::uno::UNO_QUERY_THROW);
+            }
+            // This relies on the root component context's service manager
+            // supporting the extended XSet semantics:
+            css::uno::Sequence< css::beans::NamedValue > args
+            {
+                { "uri", css::uno::Any(expandUnoRcUrl(url)) },
+                { "component-context", css::uno::Any(context) }
+            };
+            css::uno::Reference< css::container::XSet > smgr(
+                that->getRootContext()->getServiceManager(),
+                css::uno::UNO_QUERY_THROW);
+            smgr->insert(css::uno::Any(args));
+        }
+        that->addToUnoRc(RCITEM_COMPONENTS, url, xCmdEnv);
+    } else { // revoke
+        that->removeFromUnoRc(RCITEM_COMPONENTS, url, xCmdEnv);
+        if (!startup) {
+            // This relies on the root component context's service manager
+            // supporting the extended XSet semantics:
+            css::uno::Sequence< css::beans::NamedValue > args { { "uri", css::uno::Any(expandUnoRcUrl(url)) } };
+            css::uno::Reference< css::container::XSet > smgr(
+                that->getRootContext()->getServiceManager(),
+                css::uno::UNO_QUERY_THROW);
+            smgr->remove(css::uno::Any(args));
+        }
+        that->releaseObject(url);
+        that->revokeEntryFromDb(url); // in case it got added with old code
+    }
+}
+
+BackendImpl::ComponentsPackageImpl::ComponentsPackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url, OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    bool bRemoved, OUString const & identifier)
+    : Package( myBackend, url, name, name /* display-name */,
+               xPackageType, bRemoved, identifier)
+{}
+
+} // anon namespace
+
+} // namespace dp_registry
+
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_component_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::component::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/configuration/dp_configuration.cxx b/desktop/source/deployment/registry/configuration/dp_configuration.cxx
new file mode 100644
index 000000000..62d5ab88f
--- /dev/null
+++ b/desktop/source/deployment/registry/configuration/dp_configuration.cxx
@@ -0,0 +1,818 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+//TODO: Large parts of this file were copied from dp_component.cxx; those parts
+// should be consolidated.
+
+#include <config_extensions.h>
+
+#include <dp_backend.h>
+#if HAVE_FEATURE_EXTENSIONS
+#include <dp_persmap.h>
+#endif
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <rtl/string.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <ucbhelper/content.hxx>
+#include <unotools/ucbhelper.hxx>
+#include <xmlscript/xml_helper.hxx>
+#include <comphelper/lok.hxx>
+#include <svl/inettype.hxx>
+#include <o3tl/string_view.hxx>
+#include <com/sun/star/configuration/Update.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <deque>
+#include <memory>
+#include <string_view>
+#include <utility>
+
+#include "dp_configurationbackenddb.hxx"
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend::configuration {
+namespace {
+
+class BackendImpl : public ::dp_registry::backend::PackageRegistryBackend
+{
+    class PackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const ;
+
+        const bool m_isSchema;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    public:
+        PackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool isSchema, bool bRemoved, OUString const & identifier)
+            : Package( myBackend, url, name, name /* display-name */,
+                       xPackageType, bRemoved, identifier),
+              m_isSchema( isSchema )
+            {}
+    };
+    friend class PackageImpl;
+
+    std::deque<OUString> m_xcs_files;
+    std::deque<OUString> m_xcu_files;
+    std::deque<OUString> & getFiles( bool xcs ) {
+        return xcs ? m_xcs_files : m_xcu_files;
+    }
+
+    bool m_configmgrini_inited;
+    bool m_configmgrini_modified;
+    std::unique_ptr<ConfigurationBackendDb> m_backendDb;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType, bool bRemoved,
+        OUString const & identifier,
+        Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+#if HAVE_FEATURE_EXTENSIONS
+    // for backwards compatibility - nil if no (compatible) back-compat db present
+    std::unique_ptr<PersistentMap> m_registeredPackages;
+#endif
+
+    virtual void SAL_CALL disposing() override;
+
+    const Reference<deployment::XPackageTypeInfo> m_xConfDataTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xConfSchemaTypeInfo;
+    Sequence< Reference<deployment::XPackageTypeInfo> > m_typeInfos;
+
+    void configmgrini_verify_init(
+        Reference<XCommandEnvironment> const & xCmdEnv );
+    void configmgrini_flush( Reference<XCommandEnvironment> const & xCmdEnv );
+
+    /* The parameter isURL is false in the case of adding the conf:ini-entry
+       value from the backend db. This entry already contains the path as it
+       is used in the configmgr.ini.
+     */
+    void addToConfigmgrIni( bool isSchema, bool isURL, OUString const & url,
+                     Reference<XCommandEnvironment> const & xCmdEnv );
+#if HAVE_FEATURE_EXTENSIONS
+    bool removeFromConfigmgrIni( bool isSchema, OUString const & url,
+                          Reference<XCommandEnvironment> const & xCmdEnv );
+#endif
+    void addDataToDb(OUString const & url, ConfigurationBackendDb::Data const & data);
+    ::std::optional<ConfigurationBackendDb::Data> readDataFromDb(std::u16string_view url);
+    void revokeEntryFromDb(std::u16string_view url);
+    bool hasActiveEntry(std::u16string_view url);
+    bool activateEntry(std::u16string_view url);
+
+public:
+    BackendImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+    using PackageRegistryBackend::disposing;
+};
+
+
+void BackendImpl::disposing()
+{
+    try {
+        configmgrini_flush( Reference<XCommandEnvironment>() );
+
+        PackageRegistryBackend::disposing();
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        throw lang::WrappedTargetRuntimeException(
+            "caught unexpected exception while disposing...",
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : PackageRegistryBackend( args, xComponentContext ),
+      m_configmgrini_inited( false ),
+      m_configmgrini_modified( false ),
+      m_xConfDataTypeInfo( new Package::TypeInfo(
+                               "application/vnd.sun.star.configuration-data",
+                               "*.xcu",
+                               DpResId(RID_STR_CONF_DATA)
+                               ) ),
+      m_xConfSchemaTypeInfo( new Package::TypeInfo(
+                                 "application/vnd.sun.star.configuration-schema",
+                                 "*.xcs",
+                                 DpResId(RID_STR_CONF_SCHEMA)
+                                 ) ),
+      m_typeInfos{ m_xConfDataTypeInfo, m_xConfSchemaTypeInfo }
+{
+    const Reference<XCommandEnvironment> xCmdEnv;
+
+    if (transientMode())
+    {
+        // TODO
+    }
+    else
+    {
+        OUString dbFile = makeURL(getCachePath(), "backenddb.xml");
+        m_backendDb.reset(
+            new ConfigurationBackendDb(getComponentContext(), dbFile));
+        //clean up data folders which are no longer used.
+        //This must not be done in the same process where the help files
+        //are still registers. Only after revoking and restarting OOo the folders
+        //can be removed. This works now, because the extension manager is a singleton
+        //and the backends are only create once per process.
+        std::vector<OUString> folders = m_backendDb->getAllDataUrls();
+        deleteUnusedFolders(folders);
+
+        configmgrini_verify_init( xCmdEnv );
+
+#if HAVE_FEATURE_EXTENSIONS
+        std::unique_ptr<PersistentMap> pMap;
+        OUString aCompatURL( makeURL( getCachePath(), "registered_packages.pmap" ) );
+
+        // Don't create it if it doesn't exist already
+        if ( ::utl::UCBContentHelper::Exists( expandUnoRcUrl( aCompatURL ) ) )
+        {
+            try
+            {
+                pMap.reset( new PersistentMap( aCompatURL ) );
+            }
+            catch (const Exception &e)
+            {
+                OUString aStr = "Exception loading legacy package database: '" +
+                    e.Message +
+                    "' - ignoring file, please remove it.\n";
+                dp_misc::writeConsole( aStr );
+            }
+        }
+        m_registeredPackages = std::move(pMap);
+#endif
+     }
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.configuration.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+void BackendImpl::addDataToDb(
+    OUString const & url, ConfigurationBackendDb::Data const & data)
+{
+    if (m_backendDb)
+        m_backendDb->addEntry(url, data);
+}
+
+::std::optional<ConfigurationBackendDb::Data> BackendImpl::readDataFromDb(
+    std::u16string_view url)
+{
+    ::std::optional<ConfigurationBackendDb::Data> data;
+    if (m_backendDb)
+        data = m_backendDb->getEntry(url);
+    return data;
+}
+
+void BackendImpl::revokeEntryFromDb(std::u16string_view url)
+{
+    if (m_backendDb)
+        m_backendDb->revokeEntry(url);
+}
+
+bool BackendImpl::hasActiveEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->hasActiveEntry(url);
+    return false;
+}
+
+bool BackendImpl::activateEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->activateEntry(url);
+    return false;
+}
+
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return m_typeInfos;
+}
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_,
+    bool bRemoved, OUString const & identifier,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    OUString mediaType( mediaType_ );
+    if (mediaType.isEmpty())
+    {
+        // detect media-type:
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, url, xCmdEnv ))
+        {
+            const OUString title( StrTitle::getTitle( ucbContent ) );
+            if (title.endsWithIgnoreAsciiCase( ".xcu" )) {
+                mediaType = "application/vnd.sun.star.configuration-data";
+            }
+            if (title.endsWithIgnoreAsciiCase( ".xcs" )) {
+                mediaType = "application/vnd.sun.star.configuration-schema";
+            }
+        }
+        if (mediaType.isEmpty())
+            throw lang::IllegalArgumentException(
+                StrCannotDetectMediaType() + url,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            OUString name;
+            if (!bRemoved)
+            {
+                ::ucbhelper::Content ucbContent( url, xCmdEnv, m_xComponentContext );
+                name = StrTitle::getTitle( ucbContent );
+            }
+
+            if (subType.equalsIgnoreAsciiCase( "vnd.sun.star.configuration-data"))
+            {
+                return new PackageImpl(
+                    this, url, name, m_xConfDataTypeInfo, false /* data file */,
+                    bRemoved, identifier);
+            }
+            else if (subType.equalsIgnoreAsciiCase( "vnd.sun.star.configuration-schema")) {
+                return new PackageImpl(
+                    this, url, name, m_xConfSchemaTypeInfo, true /* schema file */,
+                    bRemoved, identifier);
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+
+void BackendImpl::configmgrini_verify_init(
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (transientMode())
+        return;
+    const ::osl::MutexGuard guard( m_aMutex );
+    if ( m_configmgrini_inited)
+        return;
+
+    // common rc:
+    ::ucbhelper::Content ucb_content;
+    if (create_ucb_content(
+            &ucb_content,
+            makeURL( getCachePath(), "configmgr.ini" ),
+            xCmdEnv, false /* no throw */ ))
+    {
+        OUString line;
+        if (readLine( &line, "SCHEMA=", ucb_content,
+                      RTL_TEXTENCODING_UTF8 ))
+        {
+            sal_Int32 index = RTL_CONSTASCII_LENGTH("SCHEMA=");
+            do {
+                OUString token( o3tl::trim(o3tl::getToken(line, 0, ' ', index )) );
+                if (!token.isEmpty()) {
+                    //The  file may not exist anymore if a shared or bundled
+                    //extension was removed, but it can still be in the configmgrini.
+                    //After running XExtensionManager::synchronize, the configmgrini is
+                    //cleaned up
+                    m_xcs_files.push_back( token );
+                }
+            }
+            while (index >= 0);
+        }
+        if (readLine( &line, "DATA=", ucb_content,
+                      RTL_TEXTENCODING_UTF8 )) {
+            sal_Int32 index = RTL_CONSTASCII_LENGTH("DATA=");
+            do {
+                std::u16string_view token( o3tl::trim(o3tl::getToken(line, 0, ' ', index )) );
+                if (!token.empty())
+                {
+                    if (token[ 0 ] == '?')
+                        token = token.substr( 1 );
+                    //The  file may not exist anymore if a shared or bundled
+                    //extension was removed, but it can still be in the configmgrini.
+                    //After running XExtensionManager::synchronize, the configmgrini is
+                    //cleaned up
+                    m_xcu_files.push_back( OUString(token) );
+                }
+            }
+            while (index >= 0);
+        }
+    }
+    m_configmgrini_modified = false;
+    m_configmgrini_inited = true;
+}
+
+
+void BackendImpl::configmgrini_flush(
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (transientMode())
+        return;
+    if (!m_configmgrini_inited || !m_configmgrini_modified)
+        return;
+
+    OStringBuffer buf;
+    if (! m_xcs_files.empty())
+    {
+        auto iPos( m_xcs_files.cbegin() );
+        auto const iEnd( m_xcs_files.cend() );
+        buf.append( "SCHEMA=" );
+        while (iPos != iEnd) {
+            // encoded ASCII file-urls:
+            const OString item(
+                OUStringToOString( *iPos, RTL_TEXTENCODING_ASCII_US ) );
+            buf.append( item );
+            ++iPos;
+            if (iPos != iEnd)
+                buf.append( ' ' );
+        }
+        buf.append(LF);
+    }
+    if (! m_xcu_files.empty())
+    {
+        auto iPos( m_xcu_files.cbegin() );
+        auto const iEnd( m_xcu_files.cend() );
+        buf.append( "DATA=" );
+        while (iPos != iEnd) {
+            // encoded ASCII file-urls:
+            const OString item(
+                OUStringToOString( *iPos, RTL_TEXTENCODING_ASCII_US ) );
+            buf.append( item );
+            ++iPos;
+            if (iPos != iEnd)
+                buf.append( ' ' );
+        }
+        buf.append(LF);
+    }
+
+    // write configmgr.ini:
+    const Reference<io::XInputStream> xData(
+        ::xmlscript::createInputStream(
+                reinterpret_cast<sal_Int8 const *>(buf.getStr()),
+                buf.getLength() ) );
+    ::ucbhelper::Content ucb_content(
+        makeURL( getCachePath(), "configmgr.ini" ), xCmdEnv, m_xComponentContext );
+    ucb_content.writeStream( xData, true /* replace existing */ );
+
+    m_configmgrini_modified = false;
+}
+
+
+void BackendImpl::addToConfigmgrIni( bool isSchema, bool isURL, OUString const & url_,
+                              Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    const OUString rcterm( isURL ? dp_misc::makeRcTerm(url_) : url_ );
+    const ::osl::MutexGuard guard( m_aMutex );
+    configmgrini_verify_init( xCmdEnv );
+    std::deque<OUString> & rSet = getFiles(isSchema);
+    if (std::find( rSet.begin(), rSet.end(), rcterm ) == rSet.end()) {
+        rSet.push_front( rcterm ); // prepend to list, thus overriding
+        // write immediately:
+        m_configmgrini_modified = true;
+        configmgrini_flush( xCmdEnv );
+    }
+}
+
+#if HAVE_FEATURE_EXTENSIONS
+bool BackendImpl::removeFromConfigmgrIni(
+    bool isSchema, OUString const & url_,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    const OUString rcterm( dp_misc::makeRcTerm(url_) );
+    const ::osl::MutexGuard guard( m_aMutex );
+    configmgrini_verify_init( xCmdEnv );
+    std::deque<OUString> & rSet = getFiles(isSchema);
+    auto i(std::find(rSet.begin(), rSet.end(), rcterm));
+    if (i == rSet.end() && !isSchema)
+    {
+        //in case the xcu contained %origin% then the configmr.ini contains the
+        //url to the file in the user installation (e.g. $BUNDLED_EXTENSIONS_USER)
+        //However, m_url (getURL()) contains the URL for the file in the actual
+        //extension installation.
+        ::std::optional<ConfigurationBackendDb::Data> data = readDataFromDb(url_);
+        if (data)
+            i = std::find(rSet.begin(), rSet.end(), data->iniEntry);
+    }
+    if (i == rSet.end()) {
+        return false;
+    }
+    rSet.erase(i);
+    // write immediately:
+    m_configmgrini_modified = true;
+    configmgrini_flush( xCmdEnv );
+    return true;
+}
+#endif
+
+// Package
+
+
+BackendImpl * BackendImpl::PackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException(
+            "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<PackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::PackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    BackendImpl * that = getMyBackend();
+
+    bool bReg = false;
+    if (that->hasActiveEntry(getURL()))
+        bReg = true;
+
+#if HAVE_FEATURE_EXTENSIONS
+    const OUString url(getURL());
+    if (!bReg && that->m_registeredPackages)
+    {
+        // fallback for user extension registered in berkeley DB
+        bReg = that->m_registeredPackages->has(
+            OUStringToOString( url, RTL_TEXTENCODING_UTF8 ));
+    }
+#endif
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true, beans::Ambiguous<sal_Bool>( bReg, false ) );
+}
+
+
+OUString encodeForXml( OUString const & text )
+{
+    // encode conforming xml:
+    sal_Int32 len = text.getLength();
+    OUStringBuffer buf;
+    for ( sal_Int32 pos = 0; pos < len; ++pos )
+    {
+        sal_Unicode c = text[ pos ];
+        switch (c) {
+        case '<':
+            buf.append( "&lt;" );
+            break;
+        case '>':
+            buf.append( "&gt;" );
+            break;
+        case '&':
+            buf.append( "&amp;" );
+            break;
+        case '\'':
+            buf.append( "&apos;" );
+            break;
+        case '\"':
+            buf.append( "&quot;" );
+            break;
+        default:
+            buf.append( c );
+            break;
+        }
+    }
+    return buf.makeStringAndClear();
+}
+
+
+OUString replaceOrigin(
+    OUString const & url, std::u16string_view destFolder, Reference< XCommandEnvironment > const & xCmdEnv, Reference< XComponentContext > const & xContext, bool & out_replaced)
+{
+    // looking for %origin%:
+    ::ucbhelper::Content ucb_content( url, xCmdEnv, xContext );
+    std::vector<sal_Int8> bytes( readFile( ucb_content ) );
+    std::vector<sal_Int8> filtered( bytes.size() * 2 );
+    bool use_filtered = false;
+    OString origin;
+    char const * pBytes = reinterpret_cast<char const *>(
+        bytes.data());
+    std::size_t nBytes = bytes.size();
+    size_t write_pos = 0;
+    while (nBytes > 0)
+    {
+        sal_Int32 index = rtl_str_indexOfChar_WithLength( pBytes, nBytes, '%' );
+        if (index < 0) {
+            if (! use_filtered) // opt
+                break;
+            index = nBytes;
+        }
+
+        if ((write_pos + index) > filtered.size())
+            filtered.resize( (filtered.size() + index) * 2 );
+        memcpy( filtered.data() + write_pos, pBytes, index );
+        write_pos += index;
+        pBytes += index;
+        nBytes -= index;
+        if (nBytes == 0)
+            break;
+
+        // consume %:
+        ++pBytes;
+        --nBytes;
+        char const * pAdd = "%";
+        sal_Int32 nAdd = 1;
+        if (nBytes > 1 && pBytes[ 0 ] == '%')
+        {
+            // %% => %
+            ++pBytes;
+            --nBytes;
+            use_filtered = true;
+        }
+        else if (rtl_str_shortenedCompare_WithLength(
+                     pBytes, nBytes,
+                     "origin%",
+                     RTL_CONSTASCII_LENGTH("origin%"),
+                     RTL_CONSTASCII_LENGTH("origin%")) == 0)
+        {
+            if (origin.isEmpty()) {
+                // encode only once
+                origin = OUStringToOString(
+                    encodeForXml( url.copy( 0, url.lastIndexOf( '/' ) ) ),
+                    // xxx todo: encode always for UTF-8? => lookup doc-header?
+                    RTL_TEXTENCODING_UTF8 );
+            }
+            pAdd = origin.getStr();
+            nAdd = origin.getLength();
+            pBytes += RTL_CONSTASCII_LENGTH("origin%");
+            nBytes -= RTL_CONSTASCII_LENGTH("origin%");
+            use_filtered = true;
+        }
+        if ((write_pos + nAdd) > filtered.size())
+            filtered.resize( (filtered.size() + nAdd) * 2 );
+        memcpy( filtered.data() + write_pos, pAdd, nAdd );
+        write_pos += nAdd;
+    }
+    if (!use_filtered)
+        return url;
+    if (write_pos < filtered.size())
+        filtered.resize( write_pos );
+    OUString newUrl(url);
+    if (!destFolder.empty())
+    {
+        //get the file name of the xcu and add it to the url of the temporary folder
+        sal_Int32 i = url.lastIndexOf('/');
+        newUrl = OUString::Concat(destFolder) + url.subView(i);
+    }
+
+    ucbhelper::Content(newUrl, xCmdEnv, xContext).writeStream(
+        xmlscript::createInputStream(std::move(filtered)), true);
+    out_replaced = true;
+    return newUrl;
+}
+
+
+void BackendImpl::PackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool startup,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    BackendImpl * that = getMyBackend();
+    OUString url( getURL() );
+
+    if (doRegisterPackage)
+    {
+        if (getMyBackend()->activateEntry(getURL()))
+        {
+            ::std::optional<ConfigurationBackendDb::Data> data = that->readDataFromDb(url);
+            OSL_ASSERT(data);
+            that->addToConfigmgrIni( m_isSchema, false, data->iniEntry, xCmdEnv );
+        }
+        else
+        {
+            ConfigurationBackendDb::Data data;
+            if (!m_isSchema)
+            {
+                const OUString sModFolder = that->createFolder(xCmdEnv);
+                bool out_replaced = false;
+                url = replaceOrigin(url, sModFolder, xCmdEnv, that->getComponentContext(), out_replaced);
+                if (out_replaced)
+                    data.dataUrl = sModFolder;
+                else
+                    deleteTempFolder(sModFolder);
+            }
+            //No need for live-deployment for bundled extension, because OOo
+            //restarts after installation
+            if ((that->m_eContext != Context::Bundled && !startup)
+                 || comphelper::LibreOfficeKit::isActive())
+            {
+                if (m_isSchema)
+                {
+                    css::configuration::Update::get(
+                        that->m_xComponentContext)->insertExtensionXcsFile(
+                            that->m_eContext == Context::Shared, expandUnoRcUrl(url));
+                }
+                else
+                {
+                    css::configuration::Update::get(
+                        that->m_xComponentContext)->insertExtensionXcuFile(
+                            that->m_eContext == Context::Shared, expandUnoRcUrl(url));
+                }
+            }
+            that->addToConfigmgrIni( m_isSchema, true, url, xCmdEnv );
+            data.iniEntry = dp_misc::makeRcTerm(url);
+            that->addDataToDb(getURL(), data);
+        }
+    }
+    else // revoke
+    {
+#if HAVE_FEATURE_EXTENSIONS
+        if (!that->removeFromConfigmgrIni(m_isSchema, url, xCmdEnv) &&
+            that->m_registeredPackages) {
+            // Obsolete package database handling - should be removed for LibreOffice 4.0
+            t_string2string_map entries(
+                that->m_registeredPackages->getEntries());
+            for (auto const& entry : entries)
+            {
+                //If the xcu file was installed before the configmgr was changed
+                //to use the configmgr.ini, one needed to rebuild to whole directory
+                //structure containing the xcu, xcs files from all extensions. Now,
+                //we just add all other xcu/xcs files to the configmgr.ini instead of
+                //rebuilding the directory structure.
+                OUString url2(
+                    OStringToOUString(entry.first, RTL_TEXTENCODING_UTF8));
+                if (url2 != url) {
+                   bool schema = entry.second.equalsIgnoreAsciiCase(
+                       "vnd.sun.star.configuration-schema");
+                   OUString url_replaced(url2);
+                   ConfigurationBackendDb::Data data;
+                   if (!schema)
+                   {
+                       const OUString sModFolder = that->createFolder(xCmdEnv);
+                       bool out_replaced = false;
+                       url_replaced = replaceOrigin(
+                           url2, sModFolder, xCmdEnv, that->getComponentContext(), out_replaced);
+                       if (out_replaced)
+                           data.dataUrl = sModFolder;
+                       else
+                           deleteTempFolder(sModFolder);
+                   }
+                   that->addToConfigmgrIni(schema, true, url_replaced, xCmdEnv);
+                   data.iniEntry = dp_misc::makeRcTerm(url_replaced);
+                   that->addDataToDb(url2, data);
+                }
+                that->m_registeredPackages->erase(entry.first);
+            }
+            try
+            {
+                ::ucbhelper::Content(
+                    makeURL( that->getCachePath(), "registry" ),
+                    xCmdEnv, that->getComponentContext() ).executeCommand(
+                        "delete", Any( true /* delete physically */ ) );
+            }
+            catch(const Exception&)
+            {
+                OSL_ASSERT(false);
+            }
+        }
+#endif
+        ::std::optional<ConfigurationBackendDb::Data> data = that->readDataFromDb(url);
+        //If an xcu file was life deployed then always a data entry is written.
+        //If the xcu file was already in the configmr.ini then there is also
+        //a data entry
+        if (!m_isSchema && data)
+        {
+            css::configuration::Update::get(
+                that->m_xComponentContext)->removeExtensionXcuFile(expandUnoRcTerm(data->iniEntry));
+        }
+        that->revokeEntryFromDb(url);
+    }
+}
+
+} // anon namespace
+
+} // namespace dp_registry
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_configuration_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::configuration::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.cxx b/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.cxx
new file mode 100644
index 000000000..afdc8112f
--- /dev/null
+++ b/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.cxx
@@ -0,0 +1,161 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/xml/xpath/XXPathAPI.hpp>
+
+#include "dp_configurationbackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/configuration-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"conf";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"configuration-backend-db";
+constexpr OUStringLiteral KEY_ELEMENT_NAME = u"configuration";
+
+namespace dp_registry::backend::configuration {
+
+ConfigurationBackendDb::ConfigurationBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):BackendDb(xContext, url)
+{
+
+}
+
+OUString ConfigurationBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString ConfigurationBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString ConfigurationBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString ConfigurationBackendDb::getKeyElementName()
+{
+    return KEY_ELEMENT_NAME;
+}
+
+
+void ConfigurationBackendDb::addEntry(OUString const & url, Data const & data)
+{
+    try{
+        if (!activateEntry(url))
+        {
+            Reference<css::xml::dom::XNode> helpNode
+                = writeKeyElement(url);
+
+            writeSimpleElement(u"data-url", data.dataUrl, helpNode);
+            writeSimpleElement(u"ini-entry", data.iniEntry, helpNode);
+            save();
+        }
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in configuration backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+
+::std::optional<ConfigurationBackendDb::Data>
+ConfigurationBackendDb::getEntry(std::u16string_view url)
+{
+    try
+    {
+        ConfigurationBackendDb::Data retData;
+        Reference<css::xml::dom::XNode> aNode = getKeyElement(url);
+        if (aNode.is())
+        {
+            retData.dataUrl = readSimpleElement(u"data-url", aNode);
+            retData.iniEntry = readSimpleElement(u"ini-entry", aNode);
+        }
+        else
+        {
+            return ::std::optional<Data>();
+        }
+        return ::std::optional<Data>(retData);
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in configuration backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+std::vector<OUString> ConfigurationBackendDb::getAllDataUrls()
+{
+    try
+    {
+        std::vector<OUString> listRet;
+        Reference<css::xml::dom::XDocument> doc = getDocument();
+        Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+
+        Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        const OUString sPrefix = getNSPrefix();
+        OUString sExpression(
+            sPrefix + ":configuration/" + sPrefix + ":data-url/text()");
+        Reference<css::xml::dom::XNodeList> nodes =
+            xpathApi->selectNodeList(root, sExpression);
+        if (nodes.is())
+        {
+            sal_Int32 length = nodes->getLength();
+            for (sal_Int32 i = 0; i < length; i++)
+                listRet.push_back(nodes->item(i)->getNodeValue());
+        }
+        return listRet;
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in configuration backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+} // namespace dp_registry::backend::configuration
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.hxx b/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.hxx
new file mode 100644
index 000000000..bd48aab7b
--- /dev/null
+++ b/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.hxx
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <rtl/string.hxx>
+#include <vector>
+#include <optional>
+#include <string_view>
+
+#include <dp_backenddb.hxx>
+
+namespace com::sun::star::uno
+{
+class XComponentContext;
+}
+
+namespace dp_registry::backend::configuration
+{
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+ */
+class ConfigurationBackendDb : public dp_registry::backend::BackendDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+
+    virtual OUString getNSPrefix() override;
+
+    virtual OUString getRootElementName() override;
+
+    virtual OUString getKeyElementName() override;
+
+public:
+    struct Data
+    {
+        /* the URL to the folder containing the xcu or xcs files which contained
+           %origin%
+         */
+        OUString dataUrl;
+        /* the URL of the xcu or xcs file which is written in to the configmgr.ini
+         */
+        OUString iniEntry;
+    };
+
+public:
+    ConfigurationBackendDb(css::uno::Reference<css::uno::XComponentContext> const& xContext,
+                           OUString const& url);
+
+    void addEntry(OUString const& url, Data const& data);
+
+    ::std::optional<Data> getEntry(std::u16string_view url);
+    std::vector<OUString> getAllDataUrls();
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/dp_backend.cxx b/desktop/source/deployment/registry/dp_backend.cxx
new file mode 100644
index 000000000..2a681fe87
--- /dev/null
+++ b/desktop/source/deployment/registry/dp_backend.cxx
@@ -0,0 +1,771 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <dp_backend.h>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <rtl/ustring.hxx>
+#include <rtl/bootstrap.hxx>
+#include <sal/log.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <comphelper/unwrapargs.hxx>
+#include <ucbhelper/content.hxx>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionRemovedException.hpp>
+#include <com/sun/star/deployment/InvalidRemovedParameterException.hpp>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/InteractiveAugmentedIOException.hpp>
+#include <com/sun/star/ucb/IOErrorCode.hpp>
+#include <com/sun/star/beans/StringPair.hpp>
+#include <com/sun/star/sdbc/XResultSet.hpp>
+#include <com/sun/star/sdbc/XRow.hpp>
+#include <tools/diagnose_ex.h>
+#include <unotools/tempfile.hxx>
+#include <optional>
+#include <utility>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend {
+
+
+PackageRegistryBackend::~PackageRegistryBackend()
+{
+}
+
+
+void PackageRegistryBackend::disposing( lang::EventObject const & event )
+{
+    Reference<deployment::XPackage> xPackage(
+        event.Source, UNO_QUERY_THROW );
+    OUString url( xPackage->getURL() );
+    ::osl::MutexGuard guard( m_aMutex );
+    if ( m_bound.erase( url ) != 1 )
+    {
+        SAL_WARN("desktop.deployment", "erase(" << url << ") != 1");
+    }
+}
+
+
+PackageRegistryBackend::PackageRegistryBackend(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xContext )
+    : t_BackendBase( m_aMutex ),
+      m_xComponentContext( xContext ),
+      m_eContext( Context::Unknown )
+{
+    assert(xContext.is());
+    std::optional<OUString> cachePath;
+    std::optional<bool> readOnly;
+    comphelper::unwrapArgs( args, m_context, cachePath, readOnly );
+    if (cachePath)
+        m_cachePath = *cachePath;
+
+    if ( m_context == "user" )
+        m_eContext = Context::User;
+    else if ( m_context == "shared" )
+        m_eContext = Context::Shared;
+    else if ( m_context == "bundled" )
+        m_eContext = Context::Bundled;
+    else if ( m_context == "tmp" )
+        m_eContext = Context::Tmp;
+    else if (m_context.matchIgnoreAsciiCase("vnd.sun.star.tdoc:/"))
+        m_eContext = Context::Document;
+    else
+        m_eContext = Context::Unknown;
+}
+
+
+void PackageRegistryBackend::check()
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed) {
+        throw lang::DisposedException(
+            "PackageRegistryBackend instance has already been disposed!",
+            static_cast<OWeakObject *>(this) );
+    }
+}
+
+
+void PackageRegistryBackend::disposing()
+{
+    try {
+        for (auto const& elem : m_bound)
+            elem.second->removeEventListener(this);
+        m_bound.clear();
+        m_xComponentContext.clear();
+        WeakComponentImplHelperBase::disposing();
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        throw lang::WrappedTargetRuntimeException(
+            "caught unexpected exception while disposing!",
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+// XPackageRegistry
+
+Reference<deployment::XPackage> PackageRegistryBackend::bindPackage(
+    OUString const & url, OUString const & mediaType, sal_Bool  bRemoved,
+    OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    ::osl::ResettableMutexGuard guard( m_aMutex );
+    check();
+
+    t_string2ref::const_iterator const iFind( m_bound.find( url ) );
+    if (iFind != m_bound.end())
+    {
+        Reference<deployment::XPackage> xPackage( iFind->second );
+        if (xPackage.is())
+        {
+            if (!mediaType.isEmpty() &&
+                mediaType != xPackage->getPackageType()->getMediaType())
+                throw lang::IllegalArgumentException
+                    ("XPackageRegistry::bindPackage: media type does not match",
+                     static_cast<OWeakObject*>(this), 1);
+            if (xPackage->isRemoved() != bRemoved)
+                throw deployment::InvalidRemovedParameterException(
+                    "XPackageRegistry::bindPackage: bRemoved parameter does not match",
+                    static_cast<OWeakObject*>(this), xPackage->isRemoved(), xPackage);
+            return xPackage;
+        }
+    }
+
+    guard.clear();
+
+    Reference<deployment::XPackage> xNewPackage;
+    try {
+        xNewPackage = bindPackage_( url, mediaType, bRemoved,
+            identifier, xCmdEnv );
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException &) {
+        throw;
+    }
+    catch (const deployment::DeploymentException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        throw deployment::DeploymentException(
+            "Error binding package: " + url,
+            static_cast<OWeakObject *>(this), exc );
+    }
+
+    guard.reset();
+
+    std::pair< t_string2ref::iterator, bool > insertion(
+        m_bound.emplace(  url, xNewPackage ) );
+    if (insertion.second)
+    { // first insertion
+        SAL_WARN_IF(
+            Reference<XInterface>(insertion.first->second) != xNewPackage,
+            "desktop.deployment", "mismatch");
+    }
+    else
+    { // found existing entry
+        Reference<deployment::XPackage> xPackage( insertion.first->second );
+        if (xPackage.is())
+            return xPackage;
+        insertion.first->second = xNewPackage;
+    }
+
+    guard.clear();
+    xNewPackage->addEventListener( this ); // listen for disposing events
+    return xNewPackage;
+}
+
+OUString PackageRegistryBackend::createFolder(
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    const OUString sDataFolder = makeURL(getCachePath(), OUString());
+    //make sure the folder exist
+    ucbhelper::Content dataContent;
+    ::dp_misc::create_folder(&dataContent, sDataFolder, xCmdEnv);
+
+    const OUString baseDir(sDataFolder);
+    ::utl::TempFile aTemp(&baseDir, true);
+    const OUString& url = aTemp.GetURL();
+    return sDataFolder + url.subView(url.lastIndexOf('/'));
+}
+
+//folderURL can have the extension .tmp or .tmp_
+//Before OOo 3.4 the created a tmp file with osl_createTempFile and
+//then created a Folder with a same name and a trailing '_'
+//If the folderURL has no '_' then there is no corresponding tmp file.
+void PackageRegistryBackend::deleteTempFolder(
+    OUString const & folderUrl)
+{
+    if (!folderUrl.isEmpty())
+    {
+        erase_path( folderUrl, Reference<XCommandEnvironment>(),
+                    false /* no throw: ignore errors */ );
+
+        if (folderUrl.endsWith("_"))
+        {
+            const OUString  tempFile = folderUrl.copy(0, folderUrl.getLength() - 1);
+            erase_path( tempFile, Reference<XCommandEnvironment>(),
+                        false /* no throw: ignore errors */ );
+        }
+    }
+}
+
+//usedFolders can contain folder names which have the extension .tmp or .tmp_
+//Before OOo 3.4 we created a tmp file with osl_createTempFile and
+//then created a Folder with a same name and a trailing '_'
+//If the folderURL has no '_' then there is no corresponding tmp file.
+void PackageRegistryBackend::deleteUnusedFolders(
+    std::vector< OUString> const & usedFolders)
+{
+    try
+    {
+        const OUString sDataFolder = makeURL(getCachePath(), OUString());
+        ::ucbhelper::Content tempFolder(
+            sDataFolder, Reference<ucb::XCommandEnvironment>(), m_xComponentContext);
+
+        Reference<sdbc::XResultSet> xResultSet(
+                 StrTitle::createCursor( tempFolder, ::ucbhelper::INCLUDE_FOLDERS_ONLY ) );
+
+        // get all temp directories:
+        std::vector<OUString> tempEntries;
+
+        while (xResultSet->next())
+        {
+            OUString title(
+                Reference<sdbc::XRow>(
+                    xResultSet, UNO_QUERY_THROW )->getString(
+                        1 /* Title */ ) );
+
+            if (title.endsWith(".tmp"))
+                tempEntries.push_back(
+                    makeURLAppendSysPathSegment(sDataFolder, title));
+        }
+
+        for (const OUString & tempEntrie : tempEntries)
+        {
+            if (std::find( usedFolders.begin(), usedFolders.end(), tempEntrie ) ==
+                usedFolders.end())
+            {
+                deleteTempFolder(tempEntrie);
+            }
+        }
+    }
+    catch (const ucb::InteractiveAugmentedIOException& e)
+    {
+        //In case the folder containing all the data folder does not
+        //exist yet, we ignore the exception
+        if (e.Code != ucb::IOErrorCode_NOT_EXISTING)
+            throw;
+    }
+
+}
+
+
+Package::~Package()
+{
+}
+
+
+Package::Package( ::rtl::Reference<PackageRegistryBackend>  myBackend,
+                  OUString url,
+                  OUString aName,
+                  OUString displayName,
+                  Reference<deployment::XPackageTypeInfo> const & xPackageType,
+                  bool bRemoved,
+                  OUString identifier)
+    : t_PackageBase( m_aMutex ),
+      m_myBackend(std::move( myBackend )),
+      m_url(std::move( url )),
+      m_name(std::move( aName )),
+      m_displayName(std::move( displayName )),
+      m_xPackageType( xPackageType ),
+      m_bRemoved(bRemoved),
+      m_identifier(std::move(identifier))
+{
+    if (m_bRemoved)
+    {
+        //We use the last segment of the URL
+        SAL_WARN_IF(
+            !m_name.isEmpty(), "desktop.deployment", "non-empty m_name");
+        OUString name = m_url;
+        rtl::Bootstrap::expandMacros(name);
+        sal_Int32 index = name.lastIndexOf('/');
+        if (index != -1 && index < name.getLength())
+            m_name = name.copy(index + 1);
+    }
+}
+
+
+void Package::disposing()
+{
+    m_myBackend.clear();
+    WeakComponentImplHelperBase::disposing();
+}
+
+
+void Package::check() const
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed) {
+        throw lang::DisposedException(
+            "Package instance has already been disposed!",
+            static_cast<OWeakObject *>(const_cast<Package *>(this)));
+    }
+}
+
+// XComponent
+
+void Package::dispose()
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::dispose();
+}
+
+
+void Package::addEventListener(
+    Reference<lang::XEventListener> const & xListener )
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::addEventListener( xListener );
+}
+
+
+void Package::removeEventListener(
+    Reference<lang::XEventListener> const & xListener )
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::removeEventListener( xListener );
+}
+
+// XModifyBroadcaster
+
+void Package::addModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+    check();
+    rBHelper.addListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+
+void Package::removeModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+    check();
+    rBHelper.removeListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+
+void Package::checkAborted(
+    ::rtl::Reference<AbortChannel> const & abortChannel )
+{
+    if (abortChannel.is() && abortChannel->isAborted()) {
+        throw CommandAbortedException(
+            "abort!", static_cast<OWeakObject *>(this) );
+    }
+}
+
+// XPackage
+
+Reference<task::XAbortChannel> Package::createAbortChannel()
+{
+    check();
+    return new AbortChannel;
+}
+
+
+sal_Bool Package::isBundle()
+{
+    return false; // default
+}
+
+
+::sal_Int32 Package::checkPrerequisites(
+        const css::uno::Reference< css::task::XAbortChannel >&,
+        const css::uno::Reference< css::ucb::XCommandEnvironment >&,
+        sal_Bool)
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return 0;
+}
+
+
+sal_Bool Package::checkDependencies(
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return true;
+}
+
+
+Sequence< Reference<deployment::XPackage> > Package::getBundle(
+    Reference<task::XAbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    return Sequence< Reference<deployment::XPackage> >();
+}
+
+
+OUString Package::getName()
+{
+    return m_name;
+}
+
+beans::Optional<OUString> Package::getIdentifier()
+{
+    if (m_bRemoved)
+        return beans::Optional<OUString>(true, m_identifier);
+
+    return beans::Optional<OUString>();
+}
+
+
+OUString Package::getVersion()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return OUString();
+}
+
+
+OUString Package::getURL()
+{
+    return m_url;
+}
+
+
+OUString Package::getDisplayName()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return m_displayName;
+}
+
+
+OUString Package::getDescription()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return OUString();
+}
+
+
+OUString Package::getLicenseText()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return OUString();
+}
+
+
+Sequence<OUString> Package::getUpdateInformationURLs()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return Sequence<OUString>();
+}
+
+
+css::beans::StringPair Package::getPublisherInfo()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    css::beans::StringPair aEmptyPair;
+    return aEmptyPair;
+}
+
+
+uno::Reference< css::graphic::XGraphic > Package::getIcon( sal_Bool /*bHighContrast*/ )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    uno::Reference< css::graphic::XGraphic > aEmpty;
+    return aEmpty;
+}
+
+
+Reference<deployment::XPackageTypeInfo> Package::getPackageType()
+{
+    return m_xPackageType;
+}
+
+void Package::exportTo(
+    OUString const & destFolderURL, OUString const & newTitle,
+    sal_Int32 nameClashAction, Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    ::ucbhelper::Content destFolder( destFolderURL, xCmdEnv, getMyBackend()->getComponentContext() );
+    ::ucbhelper::Content sourceContent( getURL(), xCmdEnv, getMyBackend()->getComponentContext() );
+    bool bOk=true;
+    try
+    {
+        destFolder.transferContent(
+            sourceContent, ::ucbhelper::InsertOperation::Copy,
+            newTitle, nameClashAction);
+    }
+    catch (const css::ucb::ContentCreationException&)
+    {
+        bOk = false;
+    }
+
+    if (!bOk)
+        throw RuntimeException( "UCB transferContent() failed!", nullptr );
+}
+
+void Package::fireModified()
+{
+    ::cppu::OInterfaceContainerHelper * container = rBHelper.getContainer(
+        cppu::UnoType<util::XModifyListener>::get() );
+    if (container == nullptr)
+        return;
+
+    const Sequence< Reference<XInterface> > elements(
+        container->getElements() );
+    lang::EventObject evt( static_cast<OWeakObject *>(this) );
+    for ( const Reference<XInterface>& x : elements )
+    {
+        Reference<util::XModifyListener> xListener( x, UNO_QUERY );
+        if (xListener.is())
+            xListener->modified( evt );
+    }
+}
+
+// XPackage
+
+beans::Optional< beans::Ambiguous<sal_Bool> > Package::isRegistered(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    try {
+        ::osl::ResettableMutexGuard guard( m_aMutex );
+        return isRegistered_( guard,
+                              AbortChannel::get(xAbortChannel),
+                              xCmdEnv );
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException &) {
+        throw;
+    }
+    catch (const CommandAbortedException &) {
+        throw;
+    }
+    catch (const deployment::DeploymentException &) {
+        throw;
+    }
+    catch (const Exception & e) {
+        Any exc( ::cppu::getCaughtException() );
+        throw deployment::DeploymentException(
+            "unexpected " + exc.getValueTypeName() + ": " + e.Message,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+void Package::processPackage_impl(
+    bool doRegisterPackage,
+    bool startup,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    check();
+    bool action = false;
+
+    try {
+        try {
+            ::osl::ResettableMutexGuard guard( m_aMutex );
+            beans::Optional< beans::Ambiguous<sal_Bool> > option(
+                isRegistered_( guard, AbortChannel::get(xAbortChannel),
+                               xCmdEnv ) );
+            action = (option.IsPresent &&
+                      (option.Value.IsAmbiguous ||
+                       (doRegisterPackage ? !option.Value.Value
+                                        : option.Value.Value)));
+            if (action) {
+
+                OUString displayName = isRemoved() ? getName() : getDisplayName();
+                ProgressLevel progress(
+                    xCmdEnv,
+                    (doRegisterPackage
+                     ? PackageRegistryBackend::StrRegisteringPackage()
+                     : PackageRegistryBackend::StrRevokingPackage())
+                    + displayName );
+                processPackage_( guard,
+                                 doRegisterPackage,
+                                 startup,
+                                 AbortChannel::get(xAbortChannel),
+                                 xCmdEnv );
+            }
+        }
+        catch (lang::IllegalArgumentException &) {
+            Any e(cppu::getCaughtException());
+            throw deployment::DeploymentException(
+                ((doRegisterPackage
+                  ? DpResId(RID_STR_ERROR_WHILE_REGISTERING)
+                  : DpResId(RID_STR_ERROR_WHILE_REVOKING))
+                 + getDisplayName()),
+                static_cast< OWeakObject * >(this), e);
+        }
+        catch (const RuntimeException &) {
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "unexpected");
+            throw;
+        }
+        catch (const CommandFailedException &) {
+            throw;
+        }
+        catch (const CommandAbortedException &) {
+            throw;
+        }
+        catch (const deployment::DeploymentException &) {
+            throw;
+        }
+        catch (const Exception & e) {
+            Any exc( ::cppu::getCaughtException() );
+            throw deployment::DeploymentException(
+                (doRegisterPackage
+                 ? DpResId(RID_STR_ERROR_WHILE_REGISTERING)
+                 : DpResId(RID_STR_ERROR_WHILE_REVOKING))
+                + getDisplayName() + ": " + exc.getValueType().getTypeName() + " \"" + e.Message
+                + "\"",
+                static_cast<OWeakObject *>(this), exc );
+        }
+    }
+    catch (...) {
+        if (action)
+            fireModified();
+        throw;
+    }
+    if (action)
+        fireModified();
+}
+
+
+void Package::registerPackage(
+    sal_Bool startup,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    processPackage_impl( true /* register */, startup, xAbortChannel, xCmdEnv );
+}
+
+
+void Package::revokePackage(
+    sal_Bool startup,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    processPackage_impl( false /* revoke */, startup, xAbortChannel, xCmdEnv );
+
+}
+
+PackageRegistryBackend * Package::getMyBackend() const
+{
+    PackageRegistryBackend * pBackend = m_myBackend.get();
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException(
+            "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<Package *>(this)));
+    }
+    return pBackend;
+}
+
+OUString Package::getRepositoryName()
+{
+    PackageRegistryBackend * backEnd = getMyBackend();
+    return backEnd->getContext();
+}
+
+beans::Optional< OUString > Package::getRegistrationDataURL()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return beans::Optional<OUString>();
+}
+
+sal_Bool Package::isRemoved()
+{
+    return m_bRemoved;
+}
+
+Package::TypeInfo::~TypeInfo()
+{
+}
+
+// XPackageTypeInfo
+
+OUString Package::TypeInfo::getMediaType()
+{
+    return m_mediaType;
+}
+
+
+OUString Package::TypeInfo::getDescription()
+{
+    return getShortDescription();
+}
+
+
+OUString Package::TypeInfo::getShortDescription()
+{
+    return m_shortDescr;
+}
+
+OUString Package::TypeInfo::getFileFilter()
+{
+    return m_fileFilter;
+}
+
+Any Package::TypeInfo::getIcon( sal_Bool /*highContrast*/, sal_Bool /*smallIcon*/ )
+{
+    return Any();
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/dp_backenddb.cxx b/desktop/source/deployment/registry/dp_backenddb.cxx
new file mode 100644
index 000000000..28effd95c
--- /dev/null
+++ b/desktop/source/deployment/registry/dp_backenddb.cxx
@@ -0,0 +1,655 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <osl/file.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/xml/dom/DocumentBuilder.hpp>
+#include <com/sun/star/xml/xpath/XPathAPI.hpp>
+#include <com/sun/star/io/XActiveDataSource.hpp>
+#include <com/sun/star/io/XActiveDataControl.hpp>
+#include <dp_misc.h>
+#include <ucbhelper/content.hxx>
+#include <xmlscript/xml_helper.hxx>
+#include <dp_backenddb.hxx>
+
+
+using namespace ::com::sun::star::uno;
+
+
+namespace dp_registry::backend {
+
+BackendDb::BackendDb(
+    Reference<css::uno::XComponentContext> const &  xContext,
+    OUString const & url):
+    m_xContext(xContext)
+{
+    m_urlDb = dp_misc::expandUnoRcUrl(url);
+}
+
+void BackendDb::save()
+{
+    const Reference<css::io::XActiveDataSource> xDataSource(m_doc,css::uno::UNO_QUERY_THROW);
+    std::vector<sal_Int8> bytes;
+    xDataSource->setOutputStream(::xmlscript::createOutputStream(&bytes));
+    const Reference<css::io::XActiveDataControl> xDataControl(m_doc,css::uno::UNO_QUERY_THROW);
+    xDataControl->start();
+
+    const Reference<css::io::XInputStream> xData(
+        ::xmlscript::createInputStream(std::move(bytes)));
+    ::ucbhelper::Content ucbDb(m_urlDb, nullptr, m_xContext);
+    ucbDb.writeStream(xData, true /*replace existing*/);
+}
+
+css::uno::Reference<css::xml::dom::XDocument> const & BackendDb::getDocument()
+{
+    if (!m_doc.is())
+    {
+        const Reference<css::xml::dom::XDocumentBuilder> xDocBuilder(
+            css::xml::dom::DocumentBuilder::create(m_xContext) );
+
+        ::osl::DirectoryItem item;
+        ::osl::File::RC err = ::osl::DirectoryItem::get(m_urlDb, item);
+        if (err == ::osl::File::E_None)
+        {
+            ::ucbhelper::Content descContent(
+                m_urlDb, css::uno::Reference<css::ucb::XCommandEnvironment>(),
+                m_xContext);
+            Reference<css::io::XInputStream> xIn = descContent.openStream();
+            m_doc = xDocBuilder->parse(xIn);
+        }
+        else if (err == ::osl::File::E_NOENT)
+        {
+            //Create a new document and insert some basic stuff
+            m_doc = xDocBuilder->newDocument();
+            const Reference<css::xml::dom::XElement> rootNode =
+                m_doc->createElementNS(getDbNSName(), getNSPrefix() +
+                                       ":" + getRootElementName());
+
+            m_doc->appendChild(Reference<css::xml::dom::XNode>(
+                                   rootNode, UNO_QUERY_THROW));
+            save();
+        }
+        else
+            throw css::uno::RuntimeException(
+                "Extension manager could not access database file:"
+                + m_urlDb, nullptr);
+
+        if (!m_doc.is())
+            throw css::uno::RuntimeException(
+                "Extension manager could not get root node of data base file: "
+                      + m_urlDb, nullptr);
+    }
+
+    return m_doc;
+}
+
+Reference<css::xml::xpath::XXPathAPI> const & BackendDb::getXPathAPI()
+{
+    if (!m_xpathApi.is())
+    {
+        m_xpathApi = css::xml::xpath::XPathAPI::create( m_xContext );
+
+        m_xpathApi->registerNS( getNSPrefix(), getDbNSName() );
+    }
+
+    return m_xpathApi;
+}
+
+void BackendDb::removeElement(OUString const & sXPathExpression)
+{
+    try
+    {
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+        const Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+        const Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        //find the extension element that is to be removed
+        const Reference<css::xml::dom::XNode> aNode =
+            xpathApi->selectSingleNode(root, sXPathExpression);
+
+        if (aNode.is())
+        {
+            root->removeChild(aNode);
+            save();
+        }
+
+#if    OSL_DEBUG_LEVEL > 0
+        //There must not be any other entry with the same url
+        const Reference<css::xml::dom::XNode> nextNode =
+            xpathApi->selectSingleNode(root, sXPathExpression);
+        OSL_ASSERT(! nextNode.is());
+#endif
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+void BackendDb::removeEntry(std::u16string_view url)
+{
+    const OUString sKeyElement = getKeyElementName();
+    const OUString sPrefix = getNSPrefix();
+    OUString sExpression =
+        sPrefix +
+        ":" +
+        sKeyElement +
+        "[@url = \"" +
+        url +
+        "\"]";
+
+    removeElement(sExpression);
+}
+
+void BackendDb::revokeEntry(std::u16string_view url)
+{
+    try
+    {
+        Reference<css::xml::dom::XElement> entry(getKeyElement(url), UNO_QUERY);
+        if (entry.is())
+        {
+            entry->setAttribute("revoked", "true");
+            save();
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to revoke data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+bool BackendDb::activateEntry(std::u16string_view url)
+{
+    try
+    {
+        bool ret = false;
+        Reference<css::xml::dom::XElement> entry(getKeyElement(url), UNO_QUERY);
+        if (entry.is())
+        {
+            //no attribute "active" means it is active, that is, registered.
+            entry->removeAttribute("revoked");
+            save();
+            ret = true;
+        }
+        return ret;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to revoke data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+bool BackendDb::hasActiveEntry(std::u16string_view url)
+{
+    try
+    {
+        bool ret = false;
+        Reference<css::xml::dom::XElement> entry(getKeyElement(url), UNO_QUERY);
+        if (entry.is())
+        {
+            OUString sActive = entry->getAttribute("revoked");
+            if (!(sActive == "true"))
+                ret = true;
+        }
+        return ret;
+
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to determine an active entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+Reference<css::xml::dom::XNode> BackendDb::getKeyElement(
+    std::u16string_view url)
+{
+    try
+    {
+        const OUString sPrefix = getNSPrefix();
+        const OUString sKeyElement = getKeyElementName();
+        OUString sExpression =
+            sPrefix +
+            ":" +
+            sKeyElement +
+            "[@url = \"" +
+            url +
+            "\"]";
+
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+        const Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+        const Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        return xpathApi->selectSingleNode(root, sExpression);
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read key element in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+//Only writes the data if there is at least one entry
+void BackendDb::writeVectorOfPair(
+    std::vector< std::pair< OUString, OUString > > const & vecPairs,
+    std::u16string_view sVectorTagName,
+    std::u16string_view sPairTagName,
+    std::u16string_view sFirstTagName,
+    std::u16string_view sSecondTagName,
+    css::uno::Reference<css::xml::dom::XNode> const & xParent)
+{
+    try{
+        if (vecPairs.empty())
+            return;
+        const OUString sNameSpace = getDbNSName();
+        OSL_ASSERT(!sNameSpace.isEmpty());
+        const OUString sPrefix(getNSPrefix() + ":");
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+
+        const Reference<css::xml::dom::XElement> vectorNode(
+            doc->createElementNS(sNameSpace, sPrefix + sVectorTagName));
+
+        xParent->appendChild(
+            Reference<css::xml::dom::XNode>(
+                vectorNode, css::uno::UNO_QUERY_THROW));
+        for (auto const& vecPair : vecPairs)
+        {
+            const Reference<css::xml::dom::XElement> pairNode(
+                doc->createElementNS(sNameSpace, sPrefix + sPairTagName));
+
+            vectorNode->appendChild(
+                Reference<css::xml::dom::XNode>(
+                    pairNode, css::uno::UNO_QUERY_THROW));
+
+            const Reference<css::xml::dom::XElement> firstNode(
+                doc->createElementNS(sNameSpace, sPrefix + sFirstTagName));
+
+            pairNode->appendChild(
+                Reference<css::xml::dom::XNode>(
+                    firstNode, css::uno::UNO_QUERY_THROW));
+
+            const Reference<css::xml::dom::XText> firstTextNode(
+                doc->createTextNode( vecPair.first));
+
+            firstNode->appendChild(
+                Reference<css::xml::dom::XNode>(
+                    firstTextNode, css::uno::UNO_QUERY_THROW));
+
+            const Reference<css::xml::dom::XElement> secondNode(
+                doc->createElementNS(sNameSpace, sPrefix + sSecondTagName));
+
+            pairNode->appendChild(
+                Reference<css::xml::dom::XNode>(
+                    secondNode, css::uno::UNO_QUERY_THROW));
+
+            const Reference<css::xml::dom::XText> secondTextNode(
+                doc->createTextNode( vecPair.second));
+
+            secondNode->appendChild(
+                Reference<css::xml::dom::XNode>(
+                    secondTextNode, css::uno::UNO_QUERY_THROW));
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+std::vector< std::pair< OUString, OUString > >
+BackendDb::readVectorOfPair(
+    Reference<css::xml::dom::XNode> const & parent,
+    std::u16string_view sListTagName,
+    std::u16string_view sPairTagName,
+    std::u16string_view sFirstTagName,
+    std::u16string_view sSecondTagName)
+{
+    try
+    {
+        OSL_ASSERT(parent.is());
+        const OUString sPrefix(getNSPrefix() + ":");
+        const Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        const OUString sExprPairs(
+            sPrefix + sListTagName + "/" + sPrefix + sPairTagName);
+        const Reference<css::xml::dom::XNodeList> listPairs =
+            xpathApi->selectNodeList(parent, sExprPairs);
+
+        std::vector< std::pair< OUString, OUString > > retVector;
+        sal_Int32 length = listPairs->getLength();
+        for (sal_Int32 i = 0; i < length; i++)
+        {
+            const Reference<css::xml::dom::XNode> aPair = listPairs->item(i);
+            const OUString sExprFirst(sPrefix + sFirstTagName + "/text()");
+            const Reference<css::xml::dom::XNode> first =
+                xpathApi->selectSingleNode(aPair, sExprFirst);
+
+            const OUString sExprSecond(sPrefix + sSecondTagName + "/text()");
+            const Reference<css::xml::dom::XNode> second =
+                xpathApi->selectSingleNode(aPair, sExprSecond);
+            OSL_ASSERT(first.is() && second.is());
+
+            retVector.emplace_back(
+                                    first->getNodeValue(), second->getNodeValue());
+        }
+        return retVector;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+//Only writes the data if there is at least one entry
+void BackendDb::writeSimpleList(
+    std::deque< OUString> const & list,
+    std::u16string_view sListTagName,
+    std::u16string_view sMemberTagName,
+    Reference<css::xml::dom::XNode> const & xParent)
+{
+    try
+    {
+        if (list.empty())
+            return;
+        const OUString sNameSpace = getDbNSName();
+        const OUString sPrefix(getNSPrefix() + ":");
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+
+        const Reference<css::xml::dom::XElement> listNode(
+            doc->createElementNS(sNameSpace, sPrefix + sListTagName));
+
+        xParent->appendChild(
+            Reference<css::xml::dom::XNode>(
+                listNode, css::uno::UNO_QUERY_THROW));
+
+        for (auto const& elem : list)
+        {
+            const Reference<css::xml::dom::XNode> memberNode(
+                doc->createElementNS(sNameSpace, sPrefix + sMemberTagName), css::uno::UNO_QUERY_THROW);
+
+            listNode->appendChild(memberNode);
+
+            const Reference<css::xml::dom::XNode> textNode(
+                doc->createTextNode(elem), css::uno::UNO_QUERY_THROW);
+
+            memberNode->appendChild(textNode);
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+//Writes only the element if is has a value.
+//The prefix is automatically added to the element name
+void BackendDb::writeSimpleElement(
+    std::u16string_view sElementName, OUString const & value,
+    Reference<css::xml::dom::XNode> const & xParent)
+{
+    try
+    {
+        if (value.isEmpty())
+            return;
+        const OUString sPrefix = getNSPrefix();
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+        const OUString sNameSpace = getDbNSName();
+        const Reference<css::xml::dom::XNode> dataNode(
+            doc->createElementNS(sNameSpace, sPrefix + ":" + sElementName),
+            UNO_QUERY_THROW);
+        xParent->appendChild(dataNode);
+
+        const Reference<css::xml::dom::XNode> dataValue(
+            doc->createTextNode(value), UNO_QUERY_THROW);
+        dataNode->appendChild(dataValue);
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry(writeSimpleElement) in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+
+}
+
+/// The key elements have a url attribute and are always children of the root element.
+Reference<css::xml::dom::XNode> BackendDb::writeKeyElement(
+    OUString const & url)
+{
+    try
+    {
+        const OUString sNameSpace = getDbNSName();
+        const OUString sPrefix = getNSPrefix();
+        const OUString sElementName = getKeyElementName();
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+        const Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+
+        //Check if there are an entry with the same url. This can be the case if the
+        //status of an XPackage is ambiguous. In this case a call to activateExtension
+        //(dp_extensionmanager.cxx), will register the package again. See also
+        //Package::processPackage_impl in dp_backend.cxx.
+        //A package can become
+        //invalid after its successful registration, for example if a second extension with
+        //the same service is installed.
+        const OUString sExpression(
+            sPrefix + ":" + sElementName + "[@url = \"" + url + "\"]");
+        const Reference<css::xml::dom::XNode> existingNode =
+            getXPathAPI()->selectSingleNode(root, sExpression);
+        if (existingNode.is())
+        {
+            OSL_ASSERT(false);
+            //replace the existing entry.
+            removeEntry(url);
+        }
+
+        const Reference<css::xml::dom::XElement> keyElement(
+            doc->createElementNS(sNameSpace, sPrefix +  ":" + sElementName));
+
+        keyElement->setAttribute("url", url);
+
+        const Reference<css::xml::dom::XNode> keyNode(
+            keyElement, UNO_QUERY_THROW);
+        root->appendChild(keyNode);
+        return keyNode;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write key element in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+OUString BackendDb::readSimpleElement(
+    std::u16string_view sElementName, Reference<css::xml::dom::XNode> const & xParent)
+{
+    try
+    {
+        const OUString sPrefix = getNSPrefix();
+        const OUString sExpr(sPrefix + ":" + sElementName + "/text()");
+        const Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        const Reference<css::xml::dom::XNode> val =
+            xpathApi->selectSingleNode(xParent, sExpr);
+        if (val.is())
+            return val->getNodeValue();
+        return OUString();
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data (readSimpleElement) in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+
+std::deque< OUString> BackendDb::readList(
+    Reference<css::xml::dom::XNode> const & parent,
+    std::u16string_view sListTagName,
+    std::u16string_view sMemberTagName)
+{
+    try
+    {
+        OSL_ASSERT(parent.is());
+        const OUString sPrefix(getNSPrefix() + ":");
+        const Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        const OUString sExprList(
+            sPrefix + sListTagName + "/" + sPrefix + sMemberTagName + "/text()");
+        const Reference<css::xml::dom::XNodeList> list =
+            xpathApi->selectNodeList(parent, sExprList);
+
+        std::deque<OUString > retList;
+        sal_Int32 length = list->getLength();
+        for (sal_Int32 i = 0; i < length; i++)
+        {
+            const Reference<css::xml::dom::XNode> member = list->item(i);
+            retList.push_back(member->getNodeValue());
+        }
+        return retList;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+std::vector<OUString> BackendDb::getOneChildFromAllEntries(
+    std::u16string_view name)
+{
+    try
+    {
+        std::vector<OUString> listRet;
+        Reference<css::xml::dom::XDocument> doc = getDocument();
+        Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+
+        Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        const OUString sPrefix = getNSPrefix();
+        const OUString sKeyElement = getKeyElementName();
+        OUString sNodeSelectExpr =
+            sPrefix +
+            ":" +
+            sKeyElement +
+            "/" +
+            sPrefix +
+            ":" +
+            name +
+            "/text()";
+
+        Reference<css::xml::dom::XNodeList> nodes =
+            xpathApi->selectNodeList(root, sNodeSelectExpr);
+        if (nodes.is())
+        {
+            sal_Int32 length = nodes->getLength();
+            for (sal_Int32 i = 0; i < length; i++)
+                listRet.push_back(nodes->item(i)->getNodeValue());
+        }
+        return listRet;
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+
+RegisteredDb::RegisteredDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):BackendDb(xContext, url)
+{
+}
+
+void RegisteredDb::addEntry(OUString const & url)
+{
+    try{
+        if (!activateEntry(url))
+        {
+            const OUString sNameSpace = getDbNSName();
+            const OUString sPrefix = getNSPrefix();
+            const OUString sEntry = getKeyElementName();
+
+            Reference<css::xml::dom::XDocument> doc = getDocument();
+            Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+
+#if    OSL_DEBUG_LEVEL > 0
+            //There must not be yet an entry with the same url
+            OUString sExpression(
+                sPrefix + ":" + sEntry + "[@url = \"" + url + "\"]");
+            Reference<css::xml::dom::XNode> _extensionNode =
+                getXPathAPI()->selectSingleNode(root, sExpression);
+            OSL_ASSERT(! _extensionNode.is());
+#endif
+            Reference<css::xml::dom::XElement> helpElement(
+                doc->createElementNS(sNameSpace, sPrefix +  ":" + sEntry));
+
+            helpElement->setAttribute("url", url);
+
+            Reference<css::xml::dom::XNode> helpNode(
+                helpElement, UNO_QUERY_THROW);
+            root->appendChild(helpNode);
+
+            save();
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+} // namespace dp_registry
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/dp_registry.cxx b/desktop/source/deployment/registry/dp_registry.cxx
new file mode 100644
index 000000000..961afe7bb
--- /dev/null
+++ b/desktop/source/deployment/registry/dp_registry.cxx
@@ -0,0 +1,528 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+#include <sal/log.hxx>
+
+#include <dp_shared.hxx>
+#include <dp_package.hxx>
+#include <strings.hrc>
+#include <dp_registry.hxx>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <osl/diagnose.h>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/uri.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <comphelper/sequence.hxx>
+#include <ucbhelper/content.hxx>
+#include <o3tl/string_view.hxx>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <com/sun/star/uno/DeploymentException.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XSingleComponentFactory.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <com/sun/star/util/XUpdatable.hpp>
+#include <com/sun/star/container/XContentEnumerationAccess.hpp>
+#include <com/sun/star/deployment/XPackageTypeInfo.hpp>
+#include <com/sun/star/deployment/XPackageRegistry.hpp>
+#include <set>
+#include <string_view>
+#include <unordered_map>
+#include <unordered_set>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+
+namespace dp_registry {
+
+namespace {
+
+typedef ::cppu::WeakComponentImplHelper<
+    deployment::XPackageRegistry, util::XUpdatable > t_helper;
+
+
+class PackageRegistryImpl : private cppu::BaseMutex, public t_helper
+{
+    struct ci_string_hash {
+        std::size_t operator () ( OUString const & str ) const {
+            return str.toAsciiLowerCase().hashCode();
+        }
+    };
+    struct ci_string_equals {
+        bool operator () ( std::u16string_view str1, std::u16string_view str2 ) const{
+            return o3tl::equalsIgnoreAsciiCase( str1, str2 );
+        }
+    };
+    typedef std::unordered_map<
+        OUString, Reference<deployment::XPackageRegistry>,
+        ci_string_hash, ci_string_equals > t_string2registry;
+    typedef std::unordered_map<
+        OUString, OUString,
+        ci_string_hash, ci_string_equals > t_string2string;
+    typedef std::set<
+        Reference<deployment::XPackageRegistry> > t_registryset;
+
+    t_string2registry m_mediaType2backend;
+    t_string2string m_filter2mediaType;
+    t_registryset m_ambiguousBackends;
+    t_registryset m_allBackends;
+    std::vector< Reference<deployment::XPackageTypeInfo> > m_typesInfos;
+
+    void insertBackend(
+        Reference<deployment::XPackageRegistry> const & xBackend );
+
+protected:
+    void check();
+    virtual void SAL_CALL disposing() override;
+
+    virtual ~PackageRegistryImpl() override;
+    PackageRegistryImpl() : t_helper( m_aMutex ) {}
+
+
+public:
+    static Reference<deployment::XPackageRegistry> create(
+        OUString const & context,
+        OUString const & cachePath,
+        Reference<XComponentContext> const & xComponentContext );
+
+    // XUpdatable
+    virtual void SAL_CALL update() override;
+
+    // XPackageRegistry
+    virtual Reference<deployment::XPackage> SAL_CALL bindPackage(
+        OUString const & url, OUString const & mediaType, sal_Bool bRemoved,
+        OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv ) override;
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+};
+
+
+void PackageRegistryImpl::check()
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed) {
+        throw lang::DisposedException(
+            "PackageRegistry instance has already been disposed!",
+            static_cast<OWeakObject *>(this) );
+    }
+}
+
+
+void PackageRegistryImpl::disposing()
+{
+    // dispose all backends:
+    for (auto const& backend : m_allBackends)
+    {
+        try_dispose(backend);
+    }
+    m_mediaType2backend = t_string2registry();
+    m_ambiguousBackends = t_registryset();
+    m_allBackends = t_registryset();
+
+    t_helper::disposing();
+}
+
+
+PackageRegistryImpl::~PackageRegistryImpl()
+{
+}
+
+
+OUString normalizeMediaType( std::u16string_view mediaType )
+{
+    OUStringBuffer buf;
+    sal_Int32 index = 0;
+    for (;;) {
+        buf.append( o3tl::trim(o3tl::getToken(mediaType, 0, '/', index )) );
+        if (index < 0)
+            break;
+        buf.append( '/' );
+    }
+    return buf.makeStringAndClear();
+}
+
+
+void PackageRegistryImpl::packageRemoved(
+    OUString const & url, OUString const & mediaType)
+{
+    const t_string2registry::const_iterator i =
+        m_mediaType2backend.find(mediaType);
+
+    if (i != m_mediaType2backend.end())
+    {
+        i->second->packageRemoved(url, mediaType);
+    }
+}
+
+void PackageRegistryImpl::insertBackend(
+    Reference<deployment::XPackageRegistry> const & xBackend )
+{
+    m_allBackends.insert( xBackend );
+    std::unordered_set<OUString> ambiguousFilters;
+
+    const Sequence< Reference<deployment::XPackageTypeInfo> > packageTypes(
+        xBackend->getSupportedPackageTypes() );
+    for ( Reference<deployment::XPackageTypeInfo> const & xPackageType : packageTypes )
+    {
+        m_typesInfos.push_back( xPackageType );
+
+        const OUString mediaType( normalizeMediaType(
+                                      xPackageType->getMediaType() ) );
+        std::pair<t_string2registry::iterator, bool> a_insertion(
+            m_mediaType2backend.emplace( mediaType, xBackend ) );
+        if (a_insertion.second)
+        {
+            // add parameterless media-type, too:
+            sal_Int32 semi = mediaType.indexOf( ';' );
+            if (semi >= 0) {
+                m_mediaType2backend.emplace( mediaType.copy( 0, semi ), xBackend );
+            }
+            const OUString fileFilter( xPackageType->getFileFilter() );
+            //The package backend shall also be called to determine the mediatype
+            //(XPackageRegistry.bindPackage) when the URL points to a directory.
+            const bool bExtension = (mediaType == "application/vnd.sun.star.package-bundle");
+            if (fileFilter.isEmpty() || fileFilter == "*.*" || fileFilter == "*" || bExtension)
+            {
+                m_ambiguousBackends.insert( xBackend );
+            }
+            else
+            {
+                sal_Int32 nIndex = 0;
+                do {
+                    OUString token( fileFilter.getToken( 0, ';', nIndex ) );
+                    if (token.match( "*." ))
+                        token = token.copy( 1 );
+                    if (token.isEmpty())
+                        continue;
+                    // mark any further wildcards ambig:
+                    bool ambig = (token.indexOf('*') >= 0 ||
+                                  token.indexOf('?') >= 0);
+                    if (! ambig) {
+                        std::pair<t_string2string::iterator, bool> ins(
+                            m_filter2mediaType.emplace(
+                                    token, mediaType ) );
+                        ambig = !ins.second;
+                        if (ambig) {
+                            // filter has already been in: add previously
+                            // added backend to ambig set
+                            const t_string2registry::const_iterator iFind(
+                                m_mediaType2backend.find(
+                                    /* media-type of pr. added backend */
+                                    ins.first->second ) );
+                            OSL_ASSERT(
+                                iFind != m_mediaType2backend.end() );
+                            if (iFind != m_mediaType2backend.end())
+                                m_ambiguousBackends.insert( iFind->second );
+                        }
+                    }
+                    if (ambig) {
+                        m_ambiguousBackends.insert( xBackend );
+                        // mark filter to be removed later from filters map:
+                        ambiguousFilters.insert( token );
+                    }
+                }
+                while (nIndex >= 0);
+            }
+        }
+#if OSL_DEBUG_LEVEL > 0
+        else
+        {
+            SAL_WARN( "desktop", "more than one PackageRegistryBackend for media-type=\""
+                    << mediaType
+                    << "\" => "
+                    <<  Reference<lang::XServiceInfo>(
+                            xBackend, UNO_QUERY_THROW )->getImplementationName()
+                    << "\"!" );
+        }
+#endif
+    }
+
+    // cut out ambiguous filters:
+    for (auto const& ambiguousFilter : ambiguousFilters)
+    {
+        m_filter2mediaType.erase(ambiguousFilter);
+    }
+}
+
+
+Reference<deployment::XPackageRegistry> PackageRegistryImpl::create(
+    OUString const & context,
+    OUString const & cachePath,
+    Reference<XComponentContext> const & xComponentContext )
+{
+    rtl::Reference<PackageRegistryImpl> that = new PackageRegistryImpl;
+
+    // auto-detect all registered package registries:
+    Reference<container::XEnumeration> xEnum(
+        Reference<container::XContentEnumerationAccess>(
+            xComponentContext->getServiceManager(),
+            UNO_QUERY_THROW )->createContentEnumeration(
+                "com.sun.star.deployment.PackageRegistryBackend" ) );
+    if (xEnum.is())
+    {
+        while (xEnum->hasMoreElements())
+        {
+            Any element( xEnum->nextElement() );
+            Sequence<Any> registryArgs(cachePath.isEmpty() ? 1 : 3 );
+            auto pregistryArgs = registryArgs.getArray();
+            pregistryArgs[ 0 ] <<= context;
+            if (!cachePath.isEmpty())
+            {
+                Reference<lang::XServiceInfo> xServiceInfo(
+                    element, UNO_QUERY_THROW );
+                OUString registryCachePath(
+                    makeURL( cachePath,
+                             ::rtl::Uri::encode(
+                                 xServiceInfo->getImplementationName(),
+                                 rtl_UriCharClassPchar,
+                                 rtl_UriEncodeIgnoreEscapes,
+                                 RTL_TEXTENCODING_UTF8 ) ) );
+                pregistryArgs[ 1 ] <<= registryCachePath;
+                pregistryArgs[ 2 ] <<= false; // readOnly;
+                create_folder( nullptr, registryCachePath,
+                               Reference<XCommandEnvironment>() );
+            }
+
+            Reference<deployment::XPackageRegistry> xBackend;
+            Reference<lang::XSingleComponentFactory> xFac( element, UNO_QUERY );
+            if (xFac.is()) {
+                xBackend.set(
+                    xFac->createInstanceWithArgumentsAndContext(
+                        registryArgs, xComponentContext ), UNO_QUERY );
+            }
+            else {
+                Reference<lang::XSingleServiceFactory> xSingleServiceFac(
+                    element, UNO_QUERY_THROW );
+                xBackend.set(
+                    xSingleServiceFac->createInstanceWithArguments(
+                        registryArgs ), UNO_QUERY );
+            }
+            if (! xBackend.is()) {
+                throw DeploymentException(
+                    "cannot instantiate PackageRegistryBackend service: "
+                    + Reference<lang::XServiceInfo>(
+                        element, UNO_QUERY_THROW )->getImplementationName(),
+                    static_cast<OWeakObject *>(that.get()) );
+            }
+
+            that->insertBackend( xBackend );
+        }
+    }
+
+    // Insert bundle back-end.
+    // Always register as last, because we want to add extensions also as folders
+    // and as a default we accept every folder, which was not recognized by the other
+    // backends.
+    Reference<deployment::XPackageRegistry> extensionBackend =
+        ::dp_registry::backend::bundle::create(
+            that, context, cachePath, xComponentContext);
+    that->insertBackend(extensionBackend);
+
+    Reference<lang::XServiceInfo> xServiceInfo(
+        extensionBackend, UNO_QUERY_THROW );
+
+    OSL_ASSERT(xServiceInfo.is());
+    OUString registryCachePath(
+        makeURL( cachePath,
+                 ::rtl::Uri::encode(
+                     xServiceInfo->getImplementationName(),
+                     rtl_UriCharClassPchar,
+                     rtl_UriEncodeIgnoreEscapes,
+                     RTL_TEXTENCODING_UTF8 ) ) );
+    create_folder( nullptr, registryCachePath, Reference<XCommandEnvironment>());
+
+
+#if OSL_DEBUG_LEVEL > 0
+    // dump tables:
+    {
+        t_registryset allBackends;
+        dp_misc::TRACE("> [dp_registry.cxx] media-type detection:\n\n" );
+        for (auto const& elem : that->m_filter2mediaType)
+        {
+            const Reference<deployment::XPackageRegistry> xBackend(
+                that->m_mediaType2backend.find( elem.second )->second );
+            allBackends.insert( xBackend );
+            dp_misc::TRACE(
+                "extension \"" + elem.first + "\" maps to media-type \"" + elem.second
+                + "\" maps to backend "
+                + Reference<lang::XServiceInfo>(
+                            xBackend, UNO_QUERY_THROW )
+                        ->getImplementationName()
+                + "\n");
+        }
+        dp_misc::TRACE( "> [dp_registry.cxx] ambiguous backends:\n\n" );
+        for (auto const& ambiguousBackend : that->m_ambiguousBackends)
+        {
+            OUStringBuffer buf;
+            buf.append(
+                Reference<lang::XServiceInfo>(
+                    ambiguousBackend, UNO_QUERY_THROW )->getImplementationName() );
+            buf.append( ": " );
+            const Sequence< Reference<deployment::XPackageTypeInfo> > types(
+                ambiguousBackend->getSupportedPackageTypes() );
+            for ( sal_Int32 pos = 0; pos < types.getLength(); ++pos ) {
+                Reference<deployment::XPackageTypeInfo> const & xInfo =
+                    types[ pos ];
+                buf.append( xInfo->getMediaType() );
+                const OUString filter( xInfo->getFileFilter() );
+                if (!filter.isEmpty()) {
+                    buf.append( " (" );
+                    buf.append( filter );
+                    buf.append( ")" );
+                }
+                if (pos < (types.getLength() - 1))
+                    buf.append( ", " );
+            }
+            dp_misc::TRACE(buf + "\n\n");
+        }
+        allBackends.insert( that->m_ambiguousBackends.begin(),
+                            that->m_ambiguousBackends.end() );
+        OSL_ASSERT( allBackends == that->m_allBackends );
+    }
+#endif
+
+    return that;
+}
+
+// XUpdatable: broadcast to backends
+
+void PackageRegistryImpl::update()
+{
+    check();
+    for (auto const& backend : m_allBackends)
+    {
+        const Reference<util::XUpdatable> xUpdatable(backend, UNO_QUERY);
+        if (xUpdatable.is())
+            xUpdatable->update();
+    }
+}
+
+// XPackageRegistry
+
+Reference<deployment::XPackage> PackageRegistryImpl::bindPackage(
+    OUString const & url, OUString const & mediaType_, sal_Bool bRemoved,
+    OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    check();
+    OUString mediaType(mediaType_);
+    if (mediaType.isEmpty())
+    {
+        ::ucbhelper::Content ucbContent;
+        bool bOk=true;
+
+        try
+        {
+            bOk = create_ucb_content(
+                    &ucbContent, url, xCmdEnv, false /* no throw */ )
+                    && !ucbContent.isFolder();
+        }
+        catch (const css::ucb::ContentCreationException&)
+        {
+            bOk = false;
+        }
+
+        if (bOk)
+        {
+            OUString title( StrTitle::getTitle( ucbContent ) );
+            for (;;)
+            {
+                const t_string2string::const_iterator iFind(
+                    m_filter2mediaType.find(title) );
+                if (iFind != m_filter2mediaType.end()) {
+                    mediaType = iFind->second;
+                    break;
+                }
+                sal_Int32 point = title.indexOf( '.', 1 /* consume . */ );
+                if (point < 0)
+                    break;
+                title = title.copy(point);
+            }
+        }
+    }
+    if (mediaType.isEmpty())
+    {
+        // try ambiguous backends:
+        for (auto const& ambiguousBackend : m_ambiguousBackends)
+        {
+            try {
+                return ambiguousBackend->bindPackage( url, mediaType, bRemoved,
+                    identifier, xCmdEnv );
+            }
+            catch (const lang::IllegalArgumentException &) {
+            }
+        }
+        throw lang::IllegalArgumentException(
+            DpResId(RID_STR_CANNOT_DETECT_MEDIA_TYPE) + url,
+            static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+    else
+    {
+        // get backend by media-type:
+        t_string2registry::const_iterator iFind(
+            m_mediaType2backend.find( normalizeMediaType(mediaType) ) );
+        if (iFind == m_mediaType2backend.end()) {
+            // xxx todo: more sophisticated media-type argument parsing...
+            sal_Int32 q = mediaType.indexOf( ';' );
+            if (q >= 0) {
+                iFind = m_mediaType2backend.find(
+                    normalizeMediaType(
+                        // cut parameters:
+                        mediaType.subView( 0, q ) ) );
+            }
+        }
+        if (iFind == m_mediaType2backend.end()) {
+            throw lang::IllegalArgumentException(
+                DpResId(RID_STR_UNSUPPORTED_MEDIA_TYPE) + mediaType,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+        }
+        return iFind->second->bindPackage( url, mediaType, bRemoved,
+            identifier, xCmdEnv );
+    }
+}
+
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+PackageRegistryImpl::getSupportedPackageTypes()
+{
+    return comphelper::containerToSequence(m_typesInfos);
+}
+} // anon namespace
+
+
+Reference<deployment::XPackageRegistry> create(
+    OUString const & context,
+    OUString const & cachePath,
+    Reference<XComponentContext> const & xComponentContext )
+{
+    return PackageRegistryImpl::create(
+        context, cachePath, xComponentContext );
+}
+
+} // namespace dp_registry
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/executable/dp_executable.cxx b/desktop/source/deployment/registry/executable/dp_executable.cxx
new file mode 100644
index 000000000..40b253587
--- /dev/null
+++ b/desktop/source/deployment/registry/executable/dp_executable.cxx
@@ -0,0 +1,336 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <memory>
+#include <string_view>
+
+#include <dp_misc.h>
+#include <dp_backend.h>
+#include <dp_ucb.h>
+#include <dp_interact.h>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <osl/file.hxx>
+#include <ucbhelper/content.hxx>
+#include <svl/inettype.hxx>
+#include "dp_executablebackenddb.hxx"
+#include <cppuhelper/supportsservice.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+using namespace dp_misc;
+
+namespace dp_registry::backend::executable {
+namespace {
+
+class BackendImpl : public ::dp_registry::backend::PackageRegistryBackend
+{
+    class ExecutablePackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<dp_misc::AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<dp_misc::AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+        bool getFileAttributes(sal_uInt64& out_Attributes);
+        bool isUrlTargetInExtension() const;
+
+    public:
+        ExecutablePackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool bRemoved, OUString const & identifier)
+            : Package( myBackend, url, name, name /* display-name */,
+                       xPackageType, bRemoved, identifier)
+            {}
+    };
+    friend class ExecutablePackageImpl;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType, bool bRemoved,
+        OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    void addDataToDb(OUString const & url);
+    bool hasActiveEntry(std::u16string_view url);
+    void revokeEntryFromDb(std::u16string_view url);
+
+    Reference<deployment::XPackageTypeInfo> m_xExecutableTypeInfo;
+    std::unique_ptr<ExecutableBackendDb> m_backendDb;
+public:
+    BackendImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+};
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : PackageRegistryBackend( args, xComponentContext ),
+      m_xExecutableTypeInfo(new Package::TypeInfo(
+                                "application/vnd.sun.star.executable",
+                                "", "Executable" ) )
+{
+    if (!transientMode())
+    {
+        OUString dbFile = makeURL(getCachePath(), "backenddb.xml");
+        m_backendDb.reset(
+            new ExecutableBackendDb(getComponentContext(), dbFile));
+    }
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.executable.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+void BackendImpl::addDataToDb(OUString const & url)
+{
+    if (m_backendDb)
+        m_backendDb->addEntry(url);
+}
+
+void BackendImpl::revokeEntryFromDb(std::u16string_view url)
+{
+    if (m_backendDb)
+        m_backendDb->revokeEntry(url);
+}
+
+bool BackendImpl::hasActiveEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->hasActiveEntry(url);
+    return false;
+}
+
+
+// XPackageRegistry
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return Sequence<Reference<deployment::XPackageTypeInfo> >(
+        & m_xExecutableTypeInfo, 1);
+}
+
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+// PackageRegistryBackend
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType, bool bRemoved,
+    OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (mediaType.isEmpty())
+    {
+        throw lang::IllegalArgumentException(
+            StrCannotDetectMediaType() + url,
+            static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            OUString name;
+            if (!bRemoved)
+            {
+                ::ucbhelper::Content ucbContent(
+                    url, xCmdEnv, getComponentContext() );
+                name = StrTitle::getTitle( ucbContent );
+            }
+            if (subType.equalsIgnoreAsciiCase("vnd.sun.star.executable"))
+            {
+                return new BackendImpl::ExecutablePackageImpl(
+                    this, url, name,  m_xExecutableTypeInfo, bRemoved,
+                    identifier);
+            }
+        }
+    }
+    return Reference<deployment::XPackage>();
+}
+
+
+// Package
+BackendImpl * BackendImpl::ExecutablePackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException( "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<ExecutablePackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::ExecutablePackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<dp_misc::AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    bool registered = getMyBackend()->hasActiveEntry(getURL());
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+            true /* IsPresent */,
+                beans::Ambiguous<sal_Bool>(
+                    registered, false /* IsAmbiguous */ ) );
+}
+
+void BackendImpl::ExecutablePackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool /*startup*/,
+    ::rtl::Reference<dp_misc::AbortChannel> const & abortChannel,
+    Reference<XCommandEnvironment> const & /*xCmdEnv*/ )
+{
+    checkAborted(abortChannel);
+    if (doRegisterPackage)
+    {
+        if (!isUrlTargetInExtension())
+        {
+            OSL_ASSERT(false);
+            return;
+        }
+        sal_uInt64 attributes = 0;
+        //Setting the executable attribute does not affect executables on Windows
+        if (getFileAttributes(attributes))
+        {
+            if(getMyBackend()->m_context == "user")
+                attributes |= osl_File_Attribute_OwnExe;
+            else if (getMyBackend()->m_context == "shared")
+                attributes |= (osl_File_Attribute_OwnExe | osl_File_Attribute_GrpExe
+                               | osl_File_Attribute_OthExe);
+            else if (getMyBackend()->m_context != "bundled")
+                //Bundled extensions are required to be in the properly
+                //installed. That is an executable must have the right flags
+                OSL_ASSERT(false);
+
+            //This won't have effect on Windows
+            osl::File::setAttributes(
+                    dp_misc::expandUnoRcUrl(m_url), attributes);
+        }
+        getMyBackend()->addDataToDb(getURL());
+    }
+    else
+    {
+        getMyBackend()->revokeEntryFromDb(getURL());
+    }
+}
+
+//We currently cannot check if this XPackage represents a content of a particular extension
+//But we can check if we are within $UNO_USER_PACKAGES_CACHE etc.
+//Done for security reasons. For example an extension manifest could contain a path to
+//an executable outside the extension.
+bool BackendImpl::ExecutablePackageImpl::isUrlTargetInExtension() const
+{
+    bool bSuccess = false;
+    OUString sExtensionDir;
+    if(getMyBackend()->m_context == "user")
+        sExtensionDir = dp_misc::expandUnoRcTerm("$UNO_USER_PACKAGES_CACHE");
+    else if (getMyBackend()->m_context == "shared")
+        sExtensionDir = dp_misc::expandUnoRcTerm("$UNO_SHARED_PACKAGES_CACHE");
+    else if (getMyBackend()->m_context == "bundled")
+        sExtensionDir = dp_misc::expandUnoRcTerm("$BUNDLED_EXTENSIONS");
+    else
+        OSL_ASSERT(false);
+    //remove file ellipses
+    if (osl::File::E_None == osl::File::getAbsoluteFileURL(OUString(), sExtensionDir, sExtensionDir))
+    {
+        OUString sFile;
+        if (osl::File::E_None == osl::File::getAbsoluteFileURL(
+            OUString(), dp_misc::expandUnoRcUrl(m_url), sFile))
+        {
+            if (sFile.match(sExtensionDir))
+                bSuccess = true;
+        }
+    }
+    return bSuccess;
+}
+
+bool BackendImpl::ExecutablePackageImpl::getFileAttributes(sal_uInt64& out_Attributes)
+{
+    bool bSuccess = false;
+    const OUString url(dp_misc::expandUnoRcUrl(m_url));
+    osl::DirectoryItem item;
+    if (osl::FileBase::E_None == osl::DirectoryItem::get(url, item))
+    {
+        osl::FileStatus aStatus(osl_FileStatus_Mask_Attributes);
+        if( osl::FileBase::E_None == item.getFileStatus(aStatus))
+        {
+            out_Attributes = aStatus.getAttributes();
+            bSuccess = true;
+        }
+    }
+    return bSuccess;
+}
+
+
+} // anon namespace
+
+
+} // namespace dp_registry::backend::executable
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_executable_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::executable::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/executable/dp_executablebackenddb.cxx b/desktop/source/deployment/registry/executable/dp_executablebackenddb.cxx
new file mode 100644
index 000000000..29cbf85b3
--- /dev/null
+++ b/desktop/source/deployment/registry/executable/dp_executablebackenddb.cxx
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include "dp_executablebackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/executable-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"exe";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"executable-backend-db";
+constexpr OUStringLiteral ENTRY_NAME = u"executable";
+
+namespace dp_registry::backend::executable {
+
+ExecutableBackendDb::ExecutableBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):RegisteredDb(xContext, url)
+{
+
+}
+
+OUString ExecutableBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString ExecutableBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString ExecutableBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString ExecutableBackendDb::getKeyElementName()
+{
+    return ENTRY_NAME;
+}
+
+
+} // namespace dp_registry::backend::executable
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/executable/dp_executablebackenddb.hxx b/desktop/source/deployment/registry/executable/dp_executablebackenddb.hxx
new file mode 100644
index 000000000..0561a8c54
--- /dev/null
+++ b/desktop/source/deployment/registry/executable/dp_executablebackenddb.hxx
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <dp_backenddb.hxx>
+
+namespace com::sun::star::uno
+{
+class XComponentContext;
+}
+
+namespace dp_registry::backend::executable
+{
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+   The format looks like this:
+
+<?xml version="1.0"?>
+ */
+class ExecutableBackendDb : public dp_registry::backend::RegisteredDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+
+    virtual OUString getNSPrefix() override;
+
+    virtual OUString getRootElementName() override;
+
+    virtual OUString getKeyElementName() override;
+
+public:
+    ExecutableBackendDb(css::uno::Reference<css::uno::XComponentContext> const& xContext,
+                        OUString const& url);
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/help/README.md b/desktop/source/deployment/registry/help/README.md
new file mode 100644
index 000000000..24ea19518
--- /dev/null
+++ b/desktop/source/deployment/registry/help/README.md
@@ -0,0 +1 @@
+Support for help integrated in extensions. Also see /README.help.md.
diff --git a/desktop/source/deployment/registry/help/dp_help.cxx b/desktop/source/deployment/registry/help/dp_help.cxx
new file mode 100644
index 000000000..9e1a75fb9
--- /dev/null
+++ b/desktop/source/deployment/registry/help/dp_help.cxx
@@ -0,0 +1,621 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <memory>
+#include <config_features.h>
+
+#include <strings.hrc>
+#include <dp_backend.h>
+#include <dp_misc.h>
+#include "dp_helpbackenddb.hxx"
+#include <dp_ucb.h>
+#include <rtl/uri.hxx>
+#include <osl/file.hxx>
+#include <ucbhelper/content.hxx>
+#include <svl/inettype.hxx>
+#include <unotools/pathoptions.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <o3tl/string_view.hxx>
+
+#if HAVE_FEATURE_XMLHELP
+#include <helpcompiler/compilehelp.hxx>
+#include <helpcompiler/HelpIndexer.hxx>
+#endif
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionRemovedException.hpp>
+#include <com/sun/star/ucb/SimpleFileAccess.hpp>
+#include <com/sun/star/util/XMacroExpander.hpp>
+#include <optional>
+#include <string_view>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend::help {
+namespace {
+
+
+class BackendImpl : public ::dp_registry::backend::PackageRegistryBackend
+{
+    class PackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+
+    public:
+        PackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool bRemoved, OUString const & identifier);
+
+        bool extensionContainsCompiledHelp();
+
+        //XPackage
+        virtual css::beans::Optional< OUString > SAL_CALL getRegistrationDataURL() override;
+    };
+    friend class PackageImpl;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    void implProcessHelp( PackageImpl * package, bool doRegisterPackage,
+                          Reference<ucb::XCommandEnvironment> const & xCmdEnv);
+    void implCollectXhpFiles( const OUString& aDir,
+        std::vector< OUString >& o_rXhpFileVector );
+
+    ::std::optional<HelpBackendDb::Data> readDataFromDb(std::u16string_view url);
+    bool hasActiveEntry(std::u16string_view url);
+    bool activateEntry(std::u16string_view url);
+
+    Reference< ucb::XSimpleFileAccess3 > const & getFileAccess();
+    Reference< ucb::XSimpleFileAccess3 > m_xSFA;
+
+    const Reference<deployment::XPackageTypeInfo> m_xHelpTypeInfo;
+    Sequence< Reference<deployment::XPackageTypeInfo> > m_typeInfos;
+    std::unique_ptr<HelpBackendDb> m_backendDb;
+
+public:
+    BackendImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+        getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+};
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : PackageRegistryBackend( args, xComponentContext ),
+      m_xHelpTypeInfo( new Package::TypeInfo("application/vnd.sun.star.help",
+                               OUString(),
+                               DpResId(RID_STR_HELP)
+                               ) ),
+      m_typeInfos{ m_xHelpTypeInfo }
+{
+    if (transientMode())
+        return;
+
+    OUString dbFile = makeURL(getCachePath(), "backenddb.xml");
+    m_backendDb.reset(
+        new HelpBackendDb(getComponentContext(), dbFile));
+
+    //clean up data folders which are no longer used.
+    //This must not be done in the same process where the help files
+    //are still registers. Only after revoking and restarting OOo the folders
+    //can be removed. This works now, because the extension manager is a singleton
+    //and the backends are only create once per process.
+    std::vector<OUString> folders = m_backendDb->getAllDataUrls();
+    deleteUnusedFolders(folders);
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.help.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return m_typeInfos;
+}
+
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_,
+    bool bRemoved, OUString const & identifier,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    // we don't support auto detection:
+    if (mediaType_.isEmpty())
+        throw lang::IllegalArgumentException(
+            StrCannotDetectMediaType() + url,
+            static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType_, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            OUString name;
+            if (!bRemoved)
+            {
+                ::ucbhelper::Content ucbContent(
+                    url, xCmdEnv, getComponentContext() );
+                name = StrTitle::getTitle( ucbContent );
+            }
+
+            if (subType.equalsIgnoreAsciiCase( "vnd.sun.star.help"))
+            {
+                return new PackageImpl(
+                    this, url, name, m_xHelpTypeInfo, bRemoved,
+                    identifier);
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType_,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+::std::optional<HelpBackendDb::Data> BackendImpl::readDataFromDb(
+    std::u16string_view url)
+{
+    ::std::optional<HelpBackendDb::Data> data;
+    if (m_backendDb)
+        data = m_backendDb->getEntry(url);
+    return data;
+}
+
+bool BackendImpl::hasActiveEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->hasActiveEntry(url);
+    return false;
+}
+
+bool BackendImpl::activateEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->activateEntry(url);
+    return false;
+}
+
+
+BackendImpl::PackageImpl::PackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url, OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    bool bRemoved, OUString const & identifier)
+    : Package( myBackend, url, name, name, xPackageType, bRemoved,
+               identifier)
+{
+}
+
+// Package
+BackendImpl * BackendImpl::PackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException("Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<PackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+bool BackendImpl::PackageImpl::extensionContainsCompiledHelp()
+{
+    bool bCompiled = true;
+    OUString aExpandedHelpURL = dp_misc::expandUnoRcUrl(getURL());
+
+    ::osl::Directory helpFolder(aExpandedHelpURL);
+    if ( helpFolder.open() == ::osl::File::E_None)
+    {
+        //iterate over the contents of the help folder
+        //We assume that all folders within the help folder contain language specific
+        //help files. If just one of them does not contain compiled help then this
+        //function returns false.
+        ::osl::DirectoryItem item;
+        ::osl::File::RC errorNext = ::osl::File::E_None;
+        while ((errorNext = helpFolder.getNextItem(item)) == ::osl::File::E_None)
+        {
+            //No find the language folders
+            ::osl::FileStatus stat(osl_FileStatus_Mask_Type | osl_FileStatus_Mask_FileName |osl_FileStatus_Mask_FileURL);
+            if (item.getFileStatus(stat) == ::osl::File::E_None)
+            {
+                if (stat.getFileType() != ::osl::FileStatus::Directory)
+                    continue;
+
+                //look if there is the folder help.idxl in the language folder
+                OUString compUrl(stat.getFileURL() + "/help.idxl");
+                ::osl::Directory compiledFolder(compUrl);
+                if (compiledFolder.open() != ::osl::File::E_None)
+                {
+                    bCompiled = false;
+                    break;
+                }
+            }
+            else
+            {
+                //Error
+                OSL_ASSERT(false);
+                bCompiled = false;
+                break;
+            }
+        }
+        if (errorNext != ::osl::File::E_NOENT
+            && errorNext != ::osl::File::E_None)
+        {
+            //Error
+            OSL_ASSERT(false);
+            bCompiled = false;
+        }
+    }
+    return bCompiled;
+}
+
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::PackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    BackendImpl * that = getMyBackend();
+
+    bool bReg = false;
+    if (that->hasActiveEntry(getURL()))
+        bReg = true;
+
+    return beans::Optional< beans::Ambiguous<sal_Bool> >( true, beans::Ambiguous<sal_Bool>( bReg, false ) );
+}
+
+
+void BackendImpl::PackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool /* startup */,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    BackendImpl* that = getMyBackend();
+    that->implProcessHelp( this, doRegisterPackage, xCmdEnv);
+}
+
+beans::Optional< OUString > BackendImpl::PackageImpl::getRegistrationDataURL()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    ::std::optional<HelpBackendDb::Data> data =
+          getMyBackend()->readDataFromDb(getURL());
+
+    if (data && getMyBackend()->hasActiveEntry(getURL()))
+        return beans::Optional<OUString>(true, data->dataUrl);
+
+    return beans::Optional<OUString>(true, OUString());
+}
+
+void BackendImpl::implProcessHelp(
+    PackageImpl * package, bool doRegisterPackage,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    Reference< deployment::XPackage > xPackage(package);
+    OSL_ASSERT(xPackage.is());
+    if (doRegisterPackage)
+    {
+        //revive already processed help if possible
+        if ( !activateEntry(xPackage->getURL()))
+        {
+            HelpBackendDb::Data data;
+            data.dataUrl = xPackage->getURL();
+            if (!package->extensionContainsCompiledHelp())
+            {
+#if HAVE_FEATURE_XMLHELP
+                const OUString sHelpFolder = createFolder(xCmdEnv);
+                data.dataUrl = sHelpFolder;
+
+                Reference< ucb::XSimpleFileAccess3 > xSFA = getFileAccess();
+                OUString aHelpURL = xPackage->getURL();
+                OUString aExpandedHelpURL = dp_misc::expandUnoRcUrl( aHelpURL );
+                if( !xSFA->isFolder( aExpandedHelpURL ) )
+                {
+                    OUString aErrStr = DpResId( RID_STR_HELPPROCESSING_GENERAL_ERROR ) +
+                        "No help folder";
+                    OWeakObject* oWeakThis = this;
+                    throw deployment::DeploymentException( OUString(), oWeakThis,
+                                                           Any( uno::Exception( aErrStr, oWeakThis ) ) );
+                }
+
+                // Scan languages
+                Sequence< OUString > aLanguageFolderSeq = xSFA->getFolderContents( aExpandedHelpURL, true );
+                sal_Int32 nLangCount = aLanguageFolderSeq.getLength();
+                const OUString* pSeq = aLanguageFolderSeq.getConstArray();
+                for( sal_Int32 iLang = 0 ; iLang < nLangCount ; ++iLang )
+                {
+                    OUString aLangURL = pSeq[iLang];
+                    if( xSFA->isFolder( aLangURL ) )
+                    {
+                        std::vector< OUString > aXhpFileVector;
+
+                        // calculate jar file URL
+                        sal_Int32 indexStartSegment = aLangURL.lastIndexOf('/');
+                        // for example "/en"
+                        OUString langFolderURLSegment(
+                            aLangURL.copy(
+                                indexStartSegment + 1, aLangURL.getLength() - indexStartSegment - 1));
+
+                        //create the folder in the "temporary folder"
+                        ::ucbhelper::Content langFolderContent;
+                        const OUString langFolderDest = makeURL(sHelpFolder, langFolderURLSegment);
+                        const OUString langFolderDestExpanded = ::dp_misc::expandUnoRcUrl(langFolderDest);
+                        ::dp_misc::create_folder(
+                            &langFolderContent,
+                            langFolderDest, xCmdEnv);
+
+                        static const OUStringLiteral aHelpStr(u"help");
+
+                        OUString aJarFile(
+                            makeURL(sHelpFolder, langFolderURLSegment + "/" + aHelpStr + ".jar"));
+                        aJarFile = ::dp_misc::expandUnoRcUrl(aJarFile);
+
+                        OUString aEncodedJarFilePath = rtl::Uri::encode(
+                            aJarFile, rtl_UriCharClassPchar,
+                            rtl_UriEncodeIgnoreEscapes,
+                            RTL_TEXTENCODING_UTF8 );
+                        OUString aDestBasePath = "vnd.sun.star.zip://" +
+                            aEncodedJarFilePath + "/" ;
+
+                        sal_Int32 nLenLangFolderURL = aLangURL.getLength() + 1;
+
+                        Sequence< OUString > aSubLangSeq = xSFA->getFolderContents( aLangURL, true );
+                        sal_Int32 nSubLangCount = aSubLangSeq.getLength();
+                        const OUString* pSubLangSeq = aSubLangSeq.getConstArray();
+                        for( sal_Int32 iSubLang = 0 ; iSubLang < nSubLangCount ; ++iSubLang )
+                        {
+                            OUString aSubFolderURL = pSubLangSeq[iSubLang];
+                            if( !xSFA->isFolder( aSubFolderURL ) )
+                                continue;
+
+                            implCollectXhpFiles( aSubFolderURL, aXhpFileVector );
+
+                            // Copy to package (later: move?)
+                            std::u16string_view aPureFolderName = aSubFolderURL.subView( nLenLangFolderURL );
+                            OUString aDestPath = aDestBasePath + aPureFolderName;
+                            xSFA->copy( aSubFolderURL, aDestPath );
+                        }
+
+                        // Call compiler
+                        sal_Int32 nXhpFileCount = aXhpFileVector.size();
+                        std::unique_ptr<OUString[]> pXhpFiles(new OUString[nXhpFileCount]);
+                        for( sal_Int32 iXhp = 0 ; iXhp < nXhpFileCount ; ++iXhp )
+                        {
+                            OUString aXhpFile = aXhpFileVector[iXhp];
+                            OUString aXhpRelFile = aXhpFile.copy( nLenLangFolderURL );
+                            pXhpFiles[iXhp] = aXhpRelFile;
+                        }
+
+                        OUString aOfficeHelpPath( SvtPathOptions().GetHelpPath() );
+                        OUString aOfficeHelpPathFileURL;
+                        ::osl::File::getFileURLFromSystemPath( aOfficeHelpPath, aOfficeHelpPathFileURL );
+
+                        HelpProcessingErrorInfo aErrorInfo;
+                        bool bSuccess = compileExtensionHelp(
+                            aOfficeHelpPathFileURL, aHelpStr, aLangURL,
+                            nXhpFileCount, pXhpFiles.get(),
+                            langFolderDestExpanded, aErrorInfo );
+
+                        pXhpFiles.reset();
+
+                        if( bSuccess )
+                        {
+                            OUString aLang;
+                            sal_Int32 nLastSlash = aLangURL.lastIndexOf( '/' );
+                            if( nLastSlash != -1 )
+                                aLang = aLangURL.copy( nLastSlash + 1 );
+                            else
+                                aLang = "en";
+
+                            HelpIndexer aIndexer(aLang, "help", langFolderDestExpanded, langFolderDestExpanded);
+                            aIndexer.indexDocuments();
+                        }
+
+                        if( !bSuccess )
+                        {
+                            TranslateId pErrStrId;
+                            switch( aErrorInfo.m_eErrorClass )
+                            {
+                            case HelpProcessingErrorClass::General:      pErrStrId = RID_STR_HELPPROCESSING_GENERAL_ERROR; break;
+                            case HelpProcessingErrorClass::XmlParsing:   pErrStrId = RID_STR_HELPPROCESSING_XMLPARSING_ERROR; break;
+                            default: ;
+                            };
+
+                            OUString aErrStr;
+                            if (pErrStrId)
+                            {
+                                aErrStr = DpResId(pErrStrId);
+
+                                // Remove CR/LF
+                                OUString aErrMsg( aErrorInfo.m_aErrorMsg );
+                                sal_Unicode const nCR = 13, nLF = 10;
+                                sal_Int32 nSearchCR = aErrMsg.indexOf( nCR );
+                                sal_Int32 nSearchLF = aErrMsg.indexOf( nLF );
+                                if( nSearchCR != -1 || nSearchLF != -1 )
+                                {
+                                    sal_Int32 nCopy;
+                                    if( nSearchCR == -1 )
+                                        nCopy = nSearchLF;
+                                    else if( nSearchLF == -1 )
+                                        nCopy = nSearchCR;
+                                    else
+                                        nCopy = ( nSearchCR < nSearchLF ) ? nSearchCR : nSearchLF;
+
+                                    aErrMsg = aErrMsg.copy( 0, nCopy );
+                                }
+                                aErrStr += aErrMsg;
+                                if (pErrStrId != RID_STR_HELPPROCESSING_XMLPARSING_ERROR && !aErrorInfo.m_aXMLParsingFile.isEmpty() )
+                                {
+                                    aErrStr += " in ";
+
+                                    OUString aDecodedFile = rtl::Uri::decode( aErrorInfo.m_aXMLParsingFile,
+                                                                                   rtl_UriDecodeWithCharset, RTL_TEXTENCODING_UTF8 );
+                                    aErrStr += aDecodedFile;
+                                    if( aErrorInfo.m_nXMLParsingLine != -1 )
+                                    {
+                                        aErrStr += ", line " +
+                                            OUString::number( aErrorInfo.m_nXMLParsingLine );
+                                    }
+                                }
+                            }
+
+                            OWeakObject* oWeakThis = this;
+                            throw deployment::DeploymentException( OUString(), oWeakThis,
+                                                                   Any( uno::Exception( aErrStr, oWeakThis ) ) );
+                        }
+                    }
+                }
+#else
+                (void) xCmdEnv;
+#endif
+            }
+            // Writing the data entry replaces writing the flag file. If we got to this
+            // point the registration was successful.
+            if (m_backendDb)
+                m_backendDb->addEntry(xPackage->getURL(), data);
+        }
+    } //if (doRegisterPackage)
+    else
+    {
+        if (m_backendDb)
+            m_backendDb->revokeEntry(xPackage->getURL());
+    }
+}
+
+void BackendImpl::implCollectXhpFiles( const OUString& aDir,
+    std::vector< OUString >& o_rXhpFileVector )
+{
+    Reference< ucb::XSimpleFileAccess3 > xSFA = getFileAccess();
+
+    // Scan xhp files recursively
+    Sequence< OUString > aSeq = xSFA->getFolderContents( aDir, true );
+    sal_Int32 nCount = aSeq.getLength();
+    const OUString* pSeq = aSeq.getConstArray();
+    for( sal_Int32 i = 0 ; i < nCount ; ++i )
+    {
+        OUString aURL = pSeq[i];
+        if( xSFA->isFolder( aURL ) )
+        {
+            implCollectXhpFiles( aURL, o_rXhpFileVector );
+        }
+        else
+        {
+            sal_Int32 nLastDot = aURL.lastIndexOf( '.' );
+            if( nLastDot != -1 )
+            {
+                std::u16string_view aExt = aURL.subView( nLastDot + 1 );
+                if( o3tl::equalsIgnoreAsciiCase( aExt, u"xhp" ) )
+                    o_rXhpFileVector.push_back( aURL );
+            }
+        }
+    }
+}
+
+Reference< ucb::XSimpleFileAccess3 > const & BackendImpl::getFileAccess()
+{
+    if( !m_xSFA.is() )
+    {
+        Reference<XComponentContext> const & xContext = getComponentContext();
+        if( xContext.is() )
+        {
+            m_xSFA = ucb::SimpleFileAccess::create(xContext);
+        }
+        if( !m_xSFA.is() )
+        {
+            throw RuntimeException(
+                "dp_registry::backend::help::BackendImpl::getFileAccess(), "
+                "could not instantiate SimpleFileAccess."  );
+        }
+    }
+    return m_xSFA;
+}
+
+} // anon namespace
+
+} // namespace dp_registry
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_help_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::help::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/help/dp_helpbackenddb.cxx b/desktop/source/deployment/registry/help/dp_helpbackenddb.cxx
new file mode 100644
index 000000000..19bb3c3ce
--- /dev/null
+++ b/desktop/source/deployment/registry/help/dp_helpbackenddb.cxx
@@ -0,0 +1,126 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include "dp_helpbackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/help-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"help";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"help-backend-db";
+constexpr OUStringLiteral KEY_ELEMENT_NAME = u"help";
+
+namespace dp_registry::backend::help {
+
+HelpBackendDb::HelpBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):BackendDb(xContext, url)
+{
+
+}
+
+OUString HelpBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString HelpBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString HelpBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString HelpBackendDb::getKeyElementName()
+{
+    return KEY_ELEMENT_NAME;
+}
+
+
+void HelpBackendDb::addEntry(OUString const & url, Data const & data)
+{
+    try{
+        if (!activateEntry(url))
+        {
+            Reference<css::xml::dom::XNode> helpNode
+                = writeKeyElement(url);
+
+            writeSimpleElement(u"data-url", data.dataUrl, helpNode);
+            save();
+        }
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in help backend db: " + m_urlDb, nullptr, exc);
+    }
+}
+
+
+::std::optional<HelpBackendDb::Data>
+HelpBackendDb::getEntry(std::u16string_view url)
+{
+    try
+    {
+        HelpBackendDb::Data retData;
+        Reference<css::xml::dom::XNode> aNode = getKeyElement(url);
+        if (aNode.is())
+        {
+            retData.dataUrl = readSimpleElement(u"data-url", aNode);
+        }
+        else
+        {
+            return ::std::optional<Data>();
+        }
+        return ::std::optional<Data>(retData);
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in help backend db: " + m_urlDb, nullptr, exc);
+    }
+}
+
+std::vector<OUString> HelpBackendDb::getAllDataUrls()
+{
+    return getOneChildFromAllEntries(u"data-url");
+}
+
+} // namespace dp_registry::backend::help
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/help/dp_helpbackenddb.hxx b/desktop/source/deployment/registry/help/dp_helpbackenddb.hxx
new file mode 100644
index 000000000..a46bd8663
--- /dev/null
+++ b/desktop/source/deployment/registry/help/dp_helpbackenddb.hxx
@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <optional>
+#include <string_view>
+
+#include <dp_backenddb.hxx>
+
+namespace com::sun::star::uno
+{
+class XComponentContext;
+}
+
+namespace dp_registry::backend::help
+{
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+ */
+class HelpBackendDb : public dp_registry::backend::BackendDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+
+    virtual OUString getNSPrefix() override;
+
+    virtual OUString getRootElementName() override;
+
+    virtual OUString getKeyElementName() override;
+
+public:
+    struct Data
+    {
+        /* the URL to the folder containing the compiled help files, etc.
+         */
+        OUString dataUrl;
+    };
+
+public:
+    HelpBackendDb(css::uno::Reference<css::uno::XComponentContext> const& xContext,
+                  OUString const& url);
+
+    void addEntry(OUString const& url, Data const& data);
+
+    ::std::optional<Data> getEntry(std::u16string_view url);
+    //must also return the data urls for entries with @active="false". That is,
+    //those are currently revoked.
+    std::vector<OUString> getAllDataUrls();
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/inc/dp_backend.h b/desktop/source/deployment/registry/inc/dp_backend.h
new file mode 100644
index 000000000..0fe39db45
--- /dev/null
+++ b/desktop/source/deployment/registry/inc/dp_backend.h
@@ -0,0 +1,287 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <dp_shared.hxx>
+#include <dp_interact.h>
+#include <rtl/ref.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <com/sun/star/lang/XEventListener.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/deployment/XPackageRegistry.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <unordered_map>
+#include <strings.hrc>
+#include <utility>
+
+namespace dp_registry::backend
+{
+
+class PackageRegistryBackend;
+
+inline constexpr OUStringLiteral BACKEND_SERVICE_NAME  = u"com.sun.star.deployment.PackageRegistryBackend";
+
+typedef ::cppu::WeakComponentImplHelper<
+    css::deployment::XPackage > t_PackageBase;
+
+
+class Package : protected cppu::BaseMutex, public t_PackageBase
+{
+    PackageRegistryBackend * getMyBackend() const;
+    void processPackage_impl(
+        bool registerPackage,
+        bool startup,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv );
+
+protected:
+    ::rtl::Reference<PackageRegistryBackend> m_myBackend;
+    const OUString m_url;
+    OUString m_name;
+    OUString m_displayName;
+    const css::uno::Reference<css::deployment::XPackageTypeInfo> m_xPackageType;
+    const bool m_bRemoved;
+    //Only set if m_bRemoved = true;
+    const OUString m_identifier;
+
+    void check() const;
+    void fireModified();
+    virtual void SAL_CALL disposing() override;
+
+    void checkAborted(
+        ::rtl::Reference< ::dp_misc::AbortChannel > const & abortChannel );
+
+    // @@@ to be implemented by specific backend:
+    virtual css::beans::Optional< css::beans::Ambiguous<sal_Bool> >
+    isRegistered_(
+        ::osl::ResettableMutexGuard & guard,
+        ::rtl::Reference< ::dp_misc::AbortChannel > const & abortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv )
+        = 0;
+    virtual void processPackage_(
+        ::osl::ResettableMutexGuard & guard,
+        bool registerPackage,
+        bool startup,
+        ::rtl::Reference< ::dp_misc::AbortChannel > const & abortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv )
+        = 0;
+
+    virtual ~Package() override;
+    Package( ::rtl::Reference<PackageRegistryBackend> myBackend,
+             OUString url,
+             OUString name,
+             OUString displayName,
+             css::uno::Reference<css::deployment::XPackageTypeInfo> const & xPackageType,
+             bool bRemoved,
+             OUString identifier);
+
+public:
+
+    class TypeInfo :
+        public ::cppu::WeakImplHelper<css::deployment::XPackageTypeInfo>
+    {
+        const OUString m_mediaType;
+        const OUString m_fileFilter;
+        const OUString m_shortDescr;
+    public:
+        virtual ~TypeInfo() override;
+        TypeInfo( OUString mediaType,
+                  OUString fileFilter,
+                  OUString shortDescr )
+            : m_mediaType(std::move(mediaType)), m_fileFilter(std::move(fileFilter)),
+              m_shortDescr(std::move(shortDescr))
+            {}
+        // XPackageTypeInfo
+        virtual OUString SAL_CALL getMediaType() override;
+        virtual OUString SAL_CALL getDescription() override;
+        virtual OUString SAL_CALL getShortDescription() override;
+        virtual OUString SAL_CALL getFileFilter() override;
+        virtual css::uno::Any SAL_CALL getIcon( sal_Bool highContrast,
+                                                sal_Bool smallIcon ) override;
+    };
+
+    // XComponent
+    virtual void SAL_CALL dispose() override;
+    virtual void SAL_CALL addEventListener(
+        css::uno::Reference<css::lang::XEventListener> const & xListener ) override;
+    virtual void SAL_CALL removeEventListener(
+        css::uno::Reference<css::lang::XEventListener> const & xListener ) override;
+
+    // XModifyBroadcaster
+    virtual void SAL_CALL addModifyListener(
+        css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+    virtual void SAL_CALL removeModifyListener(
+        css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+
+    // XPackage
+    virtual css::uno::Reference<css::task::XAbortChannel> SAL_CALL
+    createAbortChannel() override;
+    virtual css::beans::Optional< css::beans::Ambiguous<sal_Bool> >
+    SAL_CALL isRegistered(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual ::sal_Int32 SAL_CALL checkPrerequisites(
+        const css::uno::Reference< css::task::XAbortChannel >& xAbortChannel,
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv,
+        sal_Bool noLicenseChecking) override;
+
+    virtual ::sal_Bool SAL_CALL checkDependencies(
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv ) override;
+
+    virtual void SAL_CALL registerPackage(
+        sal_Bool startup,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+    virtual void SAL_CALL revokePackage(
+        sal_Bool startup,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+    virtual sal_Bool SAL_CALL isBundle() override;
+    virtual css::uno::Sequence< css::uno::Reference<css::deployment::XPackage> >
+    SAL_CALL getBundle(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+    virtual OUString SAL_CALL getName() override;
+    virtual css::beans::Optional< OUString > SAL_CALL getIdentifier() override;
+    virtual OUString SAL_CALL getVersion() override;
+    virtual OUString SAL_CALL getURL() override;
+    virtual OUString SAL_CALL getDisplayName() override;
+    virtual OUString SAL_CALL getDescription() override;
+    virtual OUString SAL_CALL getLicenseText() override;
+    virtual css::uno::Sequence< OUString > SAL_CALL
+    getUpdateInformationURLs() override;
+    virtual css::beans::StringPair SAL_CALL getPublisherInfo() override;
+    virtual css::uno::Reference< css::graphic::XGraphic > SAL_CALL
+    getIcon( sal_Bool bHighContrast ) override;
+    virtual css::uno::Reference<css::deployment::XPackageTypeInfo> SAL_CALL
+    getPackageType() override;
+    virtual void SAL_CALL exportTo(
+        OUString const & destFolderURL,
+        OUString const & newTitle,
+        sal_Int32 nameClashAction,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+    virtual OUString SAL_CALL getRepositoryName() override;
+    virtual css::beans::Optional< OUString > SAL_CALL getRegistrationDataURL() override;
+    virtual sal_Bool SAL_CALL isRemoved() override;
+
+};
+
+typedef ::cppu::WeakComponentImplHelper<
+    css::lang::XEventListener,
+    css::deployment::XPackageRegistry,
+    css::lang::XServiceInfo > t_BackendBase;
+
+
+class PackageRegistryBackend
+    : protected cppu::BaseMutex, public t_BackendBase
+{
+    //The map held originally WeakReferences. The map entries are removed in the disposing
+    //function, which is called when the XPackages are destructed or they are
+    //explicitly disposed. The latter happens, for example, when an extension is
+    //removed (see dp_manager.cxx). However, because of how the help systems work, now
+    // XPackageManager::getDeployedPackages is called often. This results in a lot
+    //of bindPackage calls which are costly. Therefore we keep hard references in
+    //the map now.
+    typedef std::unordered_map<
+        OUString, css::uno::Reference<css::deployment::XPackage> > t_string2ref;
+    t_string2ref m_bound;
+
+protected:
+    OUString m_cachePath;
+    css::uno::Reference<css::uno::XComponentContext> m_xComponentContext;
+
+    OUString m_context;
+    // currently only for library containers:
+    enum class Context {
+        Unknown, User, Shared, Bundled, Tmp, Document
+    } m_eContext;
+
+    static OUString StrCannotDetectMediaType() { return DpResId(RID_STR_CANNOT_DETECT_MEDIA_TYPE); }
+    static OUString StrUnsupportedMediaType() { return DpResId(RID_STR_UNSUPPORTED_MEDIA_TYPE); }
+
+    // @@@ to be implemented by specific backend:
+    virtual css::uno::Reference<css::deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv )
+        = 0;
+
+    void check();
+    virtual void SAL_CALL disposing() override;
+
+    virtual ~PackageRegistryBackend() override;
+    PackageRegistryBackend(
+        css::uno::Sequence<css::uno::Any> const & args,
+        css::uno::Reference<css::uno::XComponentContext> const & xContext );
+
+    /* creates a folder with a unique name.
+       If url is empty then it is created in the backend folder, otherwise
+       at a location relative to that folder specified by url.
+    */
+    OUString createFolder(
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+    /* deletes folders and files.
+
+       All folder all files which end with ".tmp" or ".tmp_" and which are
+       not used are deleted.
+     */
+    void deleteUnusedFolders(
+        std::vector< OUString> const & usedFolders);
+    /* deletes one folder with a "temporary" name and the corresponding
+       tmp file, which was used to derive the folder name.
+    */
+    static void deleteTempFolder(
+        OUString const & folderUrl);
+
+public:
+    static OUString StrRegisteringPackage() { return DpResId(RID_STR_REGISTERING_PACKAGE); }
+    static OUString StrRevokingPackage() { return DpResId(RID_STR_REVOKING_PACKAGE); }
+
+    css::uno::Reference<css::uno::XComponentContext> const &
+    getComponentContext() const { return m_xComponentContext; }
+
+    OUString const & getCachePath() const { return m_cachePath; }
+    bool transientMode() const { return m_cachePath.isEmpty(); }
+
+    const OUString& getContext() const {return m_context; }
+
+    // XEventListener
+    virtual void SAL_CALL disposing( css::lang::EventObject const & evt ) override;
+
+    // XPackageRegistry
+    virtual css::uno::Reference<css::deployment::XPackage> SAL_CALL bindPackage(
+        OUString const & url, OUString const & mediaType,
+        sal_Bool bRemoved, OUString const & identifier,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+//     virtual void SAL_CALL packageRemoved(
+//         OUString const & url, OUString const & mediaType)
+//         throw (css::deployment::DeploymentException,
+//                css::uno::RuntimeException);
+
+};
+
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/inc/dp_backenddb.hxx b/desktop/source/deployment/registry/inc/dp_backenddb.hxx
new file mode 100644
index 000000000..785201466
--- /dev/null
+++ b/desktop/source/deployment/registry/inc/dp_backenddb.hxx
@@ -0,0 +1,165 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <rtl/ustring.hxx>
+#include <deque>
+#include <string_view>
+#include <vector>
+
+namespace com::sun::star {
+        namespace uno {
+            class XComponentContext;
+        }
+        namespace xml::dom {
+            class XDocument;
+            class XNode;
+        }
+        namespace xml::xpath {
+            class XXPathAPI;
+        }
+}
+
+namespace dp_registry::backend {
+
+class BackendDb
+{
+private:
+
+    css::uno::Reference<css::xml::dom::XDocument> m_doc;
+    css::uno::Reference<css::xml::xpath::XXPathAPI> m_xpathApi;
+
+    BackendDb(BackendDb const &) = delete;
+    BackendDb &  operator = (BackendDb const &) = delete;
+
+protected:
+    const css::uno::Reference<css::uno::XComponentContext> m_xContext;
+    OUString m_urlDb;
+
+protected:
+
+    /* caller must make sure that only one thread accesses the function
+     */
+    css::uno::Reference<css::xml::dom::XDocument> const & getDocument();
+
+    /* the namespace prefix is "reg" (without quotes)
+     */
+    css::uno::Reference<css::xml::xpath::XXPathAPI> const & getXPathAPI();
+    void save();
+    void removeElement(OUString const & sXPathExpression);
+
+    css::uno::Reference<css::xml::dom::XNode> getKeyElement(
+        std::u16string_view url);
+
+    void writeSimpleList(
+        std::deque< OUString> const & list,
+        std::u16string_view sListTagName,
+        std::u16string_view sMemberTagName,
+        css::uno::Reference<css::xml::dom::XNode> const & xParent);
+
+    void writeVectorOfPair(
+        std::vector< std::pair< OUString, OUString > > const & vecPairs,
+        std::u16string_view sVectorTagName,
+        std::u16string_view sPairTagName,
+        std::u16string_view sFirstTagName,
+        std::u16string_view sSecondTagName,
+        css::uno::Reference<css::xml::dom::XNode> const & xParent);
+
+    void writeSimpleElement(
+        std::u16string_view sElementName, OUString const & value,
+        css::uno::Reference<css::xml::dom::XNode> const & xParent);
+
+    css::uno::Reference<css::xml::dom::XNode> writeKeyElement(
+        OUString const & url);
+
+    OUString readSimpleElement(
+        std::u16string_view sElementName,
+        css::uno::Reference<css::xml::dom::XNode> const & xParent);
+
+    std::vector< std::pair< OUString, OUString > >
+    readVectorOfPair(
+        css::uno::Reference<css::xml::dom::XNode> const & parent,
+        std::u16string_view sListTagName,
+        std::u16string_view sPairTagName,
+        std::u16string_view sFirstTagName,
+        std::u16string_view sSecondTagName);
+
+    std::deque< OUString> readList(
+        css::uno::Reference<css::xml::dom::XNode> const & parent,
+        std::u16string_view sListTagName,
+        std::u16string_view sMemberTagName);
+
+    /* returns the values of one particularly child element of all key elements.
+     */
+    std::vector< OUString> getOneChildFromAllEntries(
+        std::u16string_view sElementName);
+
+
+    /*  returns the namespace which is to be written as xmlns attribute
+        into the root element.
+     */
+    virtual OUString getDbNSName()=0;
+    /* return the namespace prefix which is to be registered with the XPath API.
+
+       The prefix can then be used in XPath expressions.
+    */
+    virtual OUString getNSPrefix()=0;
+    /* returns the name of the root element without any namespace prefix.
+     */
+    virtual OUString getRootElementName()=0;
+    /* returns the name of xml element for each entry
+     */
+    virtual OUString getKeyElementName()=0;
+
+public:
+    BackendDb(css::uno::Reference<css::uno::XComponentContext> const &  xContext,
+              OUString const & url);
+    virtual ~BackendDb() {};
+
+    void removeEntry(std::u16string_view url);
+
+    /* This is called to write the "revoked" attribute to the entry.
+       This is done when XPackage::revokePackage is called.
+    */
+    void revokeEntry(std::u16string_view url);
+
+    /* returns false if the entry does not exist yet.
+     */
+    bool activateEntry(std::u16string_view url);
+
+    bool hasActiveEntry(std::u16string_view url);
+
+};
+
+class RegisteredDb: public BackendDb
+{
+
+public:
+    RegisteredDb( css::uno::Reference<css::uno::XComponentContext> const &  xContext,
+                  OUString const & url);
+
+
+    void addEntry(OUString const & url);
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/package/dp_extbackenddb.cxx b/desktop/source/deployment/registry/package/dp_extbackenddb.cxx
new file mode 100644
index 000000000..8e656c5d7
--- /dev/null
+++ b/desktop/source/deployment/registry/package/dp_extbackenddb.cxx
@@ -0,0 +1,111 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include "dp_extbackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/extension-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"ext";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"extension-backend-db";
+constexpr OUStringLiteral KEY_ELEMENT_NAME = u"extension";
+
+namespace dp_registry::backend::bundle {
+
+ExtensionBackendDb::ExtensionBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):BackendDb(xContext, url)
+{
+
+}
+
+OUString ExtensionBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString ExtensionBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString ExtensionBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString ExtensionBackendDb::getKeyElementName()
+{
+    return KEY_ELEMENT_NAME;
+}
+
+void ExtensionBackendDb::addEntry(OUString const & url, Data const & data)
+{
+    try{
+        //reactive revoked entry if possible.
+        if (!activateEntry(url))
+        {
+            Reference<css::xml::dom::XNode> extensionNodeNode = writeKeyElement(url);
+            writeVectorOfPair( data.items, u"extension-items", u"item",
+                u"url", u"media-type", extensionNodeNode);
+            save();
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+ExtensionBackendDb::Data ExtensionBackendDb::getEntry(std::u16string_view url)
+{
+    try
+    {
+        ExtensionBackendDb::Data retData;
+        Reference<css::xml::dom::XNode> aNode = getKeyElement(url);
+
+        if (aNode.is())
+        {
+            retData.items =
+                readVectorOfPair( aNode, u"extension-items", u"item",
+                    u"url", u"media-type");
+        }
+        return retData;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+} // namespace dp_registry::backend::bundle
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/package/dp_extbackenddb.hxx b/desktop/source/deployment/registry/package/dp_extbackenddb.hxx
new file mode 100644
index 000000000..fb736e6e2
--- /dev/null
+++ b/desktop/source/deployment/registry/package/dp_extbackenddb.hxx
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <string_view>
+#include <utility>
+#include <vector>
+
+#include <rtl/ustring.hxx>
+
+#include <dp_backenddb.hxx>
+
+namespace com::sun::star::uno
+{
+class XComponentContext;
+}
+
+namespace dp_registry::backend::bundle
+{
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+ */
+class ExtensionBackendDb : public dp_registry::backend::BackendDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+    virtual OUString getNSPrefix() override;
+    virtual OUString getRootElementName() override;
+    virtual OUString getKeyElementName() override;
+
+public:
+    struct Data
+    {
+        /* every element consists of a pair of the url to the item (jar,rdb, etc)
+           and the media type
+         */
+        std::vector<std::pair<OUString, OUString>> items;
+    };
+
+public:
+    ExtensionBackendDb(css::uno::Reference<css::uno::XComponentContext> const& xContext,
+                       OUString const& url);
+
+    void addEntry(OUString const& url, Data const& data);
+
+    Data getEntry(std::u16string_view url);
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/package/dp_package.cxx b/desktop/source/deployment/registry/package/dp_package.cxx
new file mode 100644
index 000000000..36b761b54
--- /dev/null
+++ b/desktop/source/deployment/registry/package/dp_package.cxx
@@ -0,0 +1,1594 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <strings.hrc>
+#include <dp_package.hxx>
+#include <dp_backend.h>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <dp_interact.h>
+#include <dp_dependencies.hxx>
+#include <dp_platform.hxx>
+#include <dp_descriptioninfoset.hxx>
+#include <dp_identifier.hxx>
+#include <dp_resource.h>
+#include <rtl/uri.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <sal/log.hxx>
+#include <o3tl/string_view.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <ucbhelper/content.hxx>
+#include <svl/inettype.hxx>
+#include <comphelper/propertyvalue.hxx>
+#include <comphelper/sequence.hxx>
+#include <com/sun/star/lang/WrappedTargetException.hpp>
+#include <com/sun/star/graphic/XGraphic.hpp>
+#include <com/sun/star/graphic/GraphicProvider.hpp>
+#include <com/sun/star/graphic/XGraphicProvider.hpp>
+#include <com/sun/star/io/Pipe.hpp>
+#include <com/sun/star/io/XOutputStream.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/task/InteractionClassification.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <com/sun/star/ucb/XInteractionReplaceExistingData.hpp>
+#include <com/sun/star/ucb/NameClashResolveRequest.hpp>
+#include <com/sun/star/ucb/XContentAccess.hpp>
+#include <com/sun/star/ucb/NameClash.hpp>
+#include <com/sun/star/ucb/UnsupportedCommandException.hpp>
+#include <com/sun/star/sdbc/XResultSet.hpp>
+#include <com/sun/star/sdbc/XRow.hpp>
+#include <com/sun/star/packages/manifest/ManifestReader.hpp>
+#include <com/sun/star/packages/manifest/ManifestWriter.hpp>
+#include <com/sun/star/deployment/DependencyException.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionRemovedException.hpp>
+#include <com/sun/star/deployment/LicenseException.hpp>
+#include <com/sun/star/deployment/PlatformException.hpp>
+#include <com/sun/star/deployment/Prerequisites.hpp>
+#include <optional>
+#include <tools/diagnose_ex.h>
+
+#include <algorithm>
+#include <memory>
+#include <string_view>
+#include <utility>
+#include <vector>
+
+#include "dp_extbackenddb.hxx"
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+
+namespace dp_registry::backend::bundle {
+namespace {
+
+typedef cppu::ImplInheritanceHelper<PackageRegistryBackend> ImplBaseT;
+
+
+class BackendImpl : public ImplBaseT
+{
+    class PackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+        /** contains the old tooltip description for the Extension Manager GUI in OOo v.2.x
+            We keep it for backward compatibility.
+        */
+        OUString m_oldDescription;
+        OUString m_url_expanded;
+        const bool m_legacyBundle;
+        Sequence< Reference<deployment::XPackage> > m_bundle;
+        Sequence< Reference<deployment::XPackage> > * m_pBundle;
+
+        ExtensionBackendDb::Data m_dbData;
+
+        Reference<deployment::XPackage> bindBundleItem(
+            OUString const & url, OUString const & mediaType,
+            bool bRemoved, //that is, using data base information
+            OUString const & identifier,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+            bool notifyDetectionError = true );
+
+        typedef std::vector< Reference<deployment::XPackage> > t_packagevec;
+        void scanBundle(
+            t_packagevec & bundle,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv );
+        void scanLegacyBundle(
+            t_packagevec & bundle,
+            OUString const & url,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+            bool skip_registration = false );
+        std::vector<Reference<deployment::XPackage> > getPackagesFromDb(
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv);
+        bool checkPlatform(
+            Reference<ucb::XCommandEnvironment > const &  environment);
+
+        bool checkDependencies(
+            Reference<ucb::XCommandEnvironment > const &
+                environment,
+            DescriptionInfoset const & description);
+            // throws css::uno::RuntimeException,
+            // css::deployment::DeploymentException
+
+        /// @throws deployment::DeploymentException
+        /// @throws ucb::CommandFailedException
+        /// @throws ucb::CommandAbortedException
+        /// @throws RuntimeException
+        bool checkLicense(
+            Reference< ucb::XCommandEnvironment > const & xCmdEnv,
+            DescriptionInfoset const & description, bool bNoLicenseChecking);
+        // @throws DeploymentException
+        OUString getTextFromURL(
+            const Reference< ucb::XCommandEnvironment >& xCmdEnv,
+            const OUString& licenseUrl);
+
+        DescriptionInfoset getDescriptionInfoset() const;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+        virtual void SAL_CALL disposing() override;
+
+
+    public:
+        PackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url,
+            OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool legacyBundle,
+            bool bRemoved,
+            OUString const & identifier);
+
+        // XPackage
+        virtual sal_Bool SAL_CALL isBundle() override;
+
+        virtual Sequence< Reference<deployment::XPackage> > SAL_CALL getBundle(
+            Reference<task::XAbortChannel> const & xAbortChannel,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv ) override;
+        virtual OUString SAL_CALL getDescription() override;
+
+        virtual OUString SAL_CALL getLicenseText() override;
+
+        virtual void SAL_CALL exportTo(
+            OUString const & destFolderURL, OUString const & newTitle,
+            sal_Int32 nameClashAction,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+        virtual ::sal_Int32 SAL_CALL checkPrerequisites(
+            const Reference< task::XAbortChannel >& xAbortChannel,
+            const Reference< ucb::XCommandEnvironment >& xCmdEnv,
+            sal_Bool noLicenseChecking) override;
+
+        virtual sal_Bool SAL_CALL checkDependencies(
+            const Reference< ucb::XCommandEnvironment >& xCmdEnv ) override;
+
+        virtual beans::Optional<OUString> SAL_CALL getIdentifier() override;
+
+        virtual OUString SAL_CALL getVersion() override;
+
+        virtual Sequence<OUString> SAL_CALL getUpdateInformationURLs() override;
+
+        virtual beans::StringPair SAL_CALL getPublisherInfo() override;
+
+        virtual OUString SAL_CALL getDisplayName() override;
+
+        virtual Reference< graphic::XGraphic > SAL_CALL
+        getIcon( sal_Bool bHighContrast ) override;
+    };
+    friend class PackageImpl;
+
+    Reference<deployment::XPackageRegistry> m_xRootRegistry;
+    const Reference<deployment::XPackageTypeInfo> m_xBundleTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xLegacyBundleTypeInfo;
+    Sequence< Reference<deployment::XPackageTypeInfo> > m_typeInfos;
+
+    std::unique_ptr<ExtensionBackendDb> m_backendDb;
+
+    void addDataToDb(OUString const & url, ExtensionBackendDb::Data const & data);
+    ExtensionBackendDb::Data readDataFromDb(std::u16string_view url);
+    void revokeEntryFromDb(std::u16string_view url);
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        Reference<ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL disposing() override;
+
+public:
+    BackendImpl(
+        Sequence<Any> const & args,
+        Reference<XComponentContext> const & xComponentContext,
+        Reference<deployment::XPackageRegistry> const & xRootRegistry );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( OUString const& name ) override;
+    virtual Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+    using ImplBaseT::disposing;
+};
+
+//Used to find a XPackage with a particular URL
+class XPackage_eq
+{
+    OUString m_URL;
+public:
+    explicit XPackage_eq(OUString s) : m_URL(std::move(s)) {}
+    bool operator() (const Reference<deployment::XPackage> & p) const
+    {
+        return m_URL == p->getURL();
+    }
+};
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext,
+    Reference<deployment::XPackageRegistry> const & xRootRegistry )
+    : ImplBaseT( args, xComponentContext ),
+      m_xRootRegistry( xRootRegistry ),
+      m_xBundleTypeInfo( new Package::TypeInfo(
+                             "application/vnd.sun.star.package-bundle",
+                             "*.oxt;*.uno.pkg",
+                             DpResId(RID_STR_PACKAGE_BUNDLE)
+                             ) ),
+      m_xLegacyBundleTypeInfo( new Package::TypeInfo(
+                                   "application/vnd.sun.star.legacy-package-bundle",
+                                   "*.zip",
+                                   m_xBundleTypeInfo->getShortDescription()
+                                   ) ),
+    m_typeInfos{ m_xBundleTypeInfo, m_xLegacyBundleTypeInfo }
+{
+    if (!transientMode())
+    {
+        OUString dbFile = makeURL(getCachePath(), getImplementationName());
+        dbFile = makeURL(dbFile, "backenddb.xml");
+        m_backendDb.reset(
+            new ExtensionBackendDb(getComponentContext(), dbFile));
+    }
+}
+
+
+void BackendImpl::disposing()
+{
+    m_xRootRegistry.clear();
+    PackageRegistryBackend::disposing();
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.bundle.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService(OUString const & ServiceName)
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+Sequence<OUString> BackendImpl::getSupportedServiceNames()
+{
+    return { OUString(BACKEND_SERVICE_NAME) };
+}
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return m_typeInfos;
+}
+
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    //Notify the backend responsible for processing the different media
+    //types that this extension was removed.
+    ExtensionBackendDb::Data data = readDataFromDb(url);
+    for (auto const& item : data.items)
+    {
+        m_xRootRegistry->packageRemoved(item.first, item.second);
+    }
+
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_,
+    bool bRemoved, OUString const & identifier,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    OUString mediaType( mediaType_ );
+    if (mediaType.isEmpty())
+    {
+        // detect media-type:
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, url, xCmdEnv ))
+        {
+            if (ucbContent.isFolder())
+            {
+                //Every .oxt, uno.pkg file must contain a META-INF folder
+                ::ucbhelper::Content metaInfContent;
+                if (create_ucb_content(
+                    &metaInfContent, makeURL( url, "META-INF" ),
+                    xCmdEnv, false /* no throw */ ))
+                {
+                     mediaType = "application/vnd.sun.star.package-bundle";
+                }
+                //No support of legacy bundles, because every folder could be one.
+            }
+            else
+            {
+                const OUString title( StrTitle::getTitle( ucbContent ) );
+                if (title.endsWithIgnoreAsciiCase(".oxt") ||
+                    title.endsWithIgnoreAsciiCase(".uno.pkg"))
+                    mediaType = "application/vnd.sun.star.package-bundle";
+                else if (title.endsWithIgnoreAsciiCase(".zip"))
+                    mediaType = "application/vnd.sun.star.legacy-package-bundle";
+            }
+        }
+        if (mediaType.isEmpty())
+            throw lang::IllegalArgumentException(
+                StrCannotDetectMediaType() + url,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+
+            //In case a XPackage is created for a removed extension, we cannot
+            //obtain the name
+            OUString name;
+            if (!bRemoved)
+            {
+                ::ucbhelper::Content ucbContent(
+                    url, xCmdEnv, getComponentContext() );
+                name = StrTitle::getTitle( ucbContent );
+            }
+            if (subType.equalsIgnoreAsciiCase("vnd.sun.star.package-bundle"))
+            {
+                return new PackageImpl(
+                    this, url, name, m_xBundleTypeInfo, false, bRemoved,
+                    identifier);
+            }
+            else if (subType.equalsIgnoreAsciiCase( "vnd.sun.star.legacy-package-bundle"))
+            {
+                return new PackageImpl(
+                    this, url, name, m_xLegacyBundleTypeInfo, true, bRemoved,
+                    identifier);
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+void BackendImpl::addDataToDb(
+    OUString const & url, ExtensionBackendDb::Data const & data)
+{
+    if (m_backendDb)
+        m_backendDb->addEntry(url, data);
+}
+
+ExtensionBackendDb::Data BackendImpl::readDataFromDb(
+    std::u16string_view url)
+{
+    ExtensionBackendDb::Data data;
+    if (m_backendDb)
+        data = m_backendDb->getEntry(url);
+    return data;
+}
+
+void BackendImpl::revokeEntryFromDb(std::u16string_view url)
+{
+    if (m_backendDb)
+        m_backendDb->revokeEntry(url);
+}
+
+
+BackendImpl::PackageImpl::PackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url,
+    OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    bool legacyBundle, bool bRemoved, OUString const & identifier)
+    : Package( myBackend, url, name, name /* display-name */,
+               xPackageType, bRemoved, identifier),
+      m_url_expanded( expandUnoRcUrl( url ) ),
+      m_legacyBundle( legacyBundle ),
+      m_pBundle( nullptr )
+{
+    if (bRemoved)
+        m_dbData = getMyBackend()->readDataFromDb(url);
+}
+
+BackendImpl * BackendImpl::PackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException("Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<PackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+void BackendImpl::PackageImpl::disposing()
+{
+    sal_Int32 len = m_bundle.getLength();
+    Reference<deployment::XPackage> const * p = m_bundle.getConstArray();
+    for ( sal_Int32 pos = 0; pos < len; ++pos )
+        try_dispose( p[ pos ] );
+    m_bundle.realloc( 0 );
+
+    Package::disposing();
+}
+
+// Package
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::PackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    //In case the object was created for a removed extension (m_bRemoved = true)
+    //but the extension is not registered, then bundle will be empty. Then
+    //the return value will be Optional<...>.IsPresent= false. Although this is
+    //not true, this does not matter. Then registerPackage or revokePackage
+    //would never be called for the items. But since the extension is removed
+    //and not registered anyway, this does not matter.
+    const Sequence< Reference<deployment::XPackage> > bundle(
+        getBundle( abortChannel, xCmdEnv ) );
+
+    bool reg = false;
+    bool present = false;
+    bool ambig = false;
+    for ( sal_Int32 pos = bundle.getLength(); pos--; )
+    {
+        Reference<deployment::XPackage> const & xPackage = bundle[ pos ];
+        Reference<task::XAbortChannel> xSubAbortChannel(
+            xPackage->createAbortChannel() );
+        AbortChannel::Chain chain( abortChannel, xSubAbortChannel );
+        beans::Optional< beans::Ambiguous<sal_Bool> > option(
+            xPackage->isRegistered( xSubAbortChannel, xCmdEnv ) );
+
+        //present = true if at least one bundle item has this value.
+        //reg = true if all bundle items have an option value (option.IsPresent == 1)
+        //and all have value of true (option.Value.Value == true)
+        //If not, then the bundle has the status of not registered and ambiguous.
+        if (option.IsPresent)
+        {
+            beans::Ambiguous<sal_Bool> const & status = option.Value;
+            if (present)
+            {
+                //we never come here in the first iteration
+                if (reg != bool(status.Value)) {
+
+                    ambig = true;
+                    reg = false;
+                    break;
+                }
+            }
+            else
+            {
+                //we always come here in the first iteration
+                reg = status.Value;
+                present = true;
+            }
+        }
+    }
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        present, beans::Ambiguous<sal_Bool>(reg, ambig) );
+}
+
+OUString BackendImpl::PackageImpl::getTextFromURL(
+    const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv,
+    const OUString& licenseUrl)
+{
+    try
+    {
+        ::ucbhelper::Content descContent(
+            licenseUrl, xCmdEnv, getMyBackend()->getComponentContext());
+        std::vector<sal_Int8> seq = dp_misc::readFile(descContent);
+        return OUString( reinterpret_cast<char const *>(
+            seq.data()), seq.size(), RTL_TEXTENCODING_UTF8);
+    }
+    catch (const css::uno::Exception&)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+                "Could not read file " + licenseUrl, nullptr, exc);
+    }
+
+}
+
+DescriptionInfoset BackendImpl::PackageImpl::getDescriptionInfoset() const
+{
+    return dp_misc::getDescriptionInfoset(m_url_expanded);
+}
+
+bool BackendImpl::PackageImpl::checkPlatform(
+    css::uno::Reference< css::ucb::XCommandEnvironment > const &  environment)
+{
+    bool ret = false;
+    DescriptionInfoset info(getDescriptionInfoset());
+    Sequence<OUString> platforms(info.getSupportedPlatforms());
+    if (hasValidPlatform(platforms))
+    {
+        ret = true;
+    }
+    else
+    {
+        ret = false;
+        OUString msg(
+            "unsupported platform");
+        Any e(
+            css::deployment::PlatformException(
+                msg, static_cast<OWeakObject *>(this), this));
+        if (!interactContinuation(
+                e, cppu::UnoType< css::task::XInteractionApprove >::get(),
+                environment, nullptr, nullptr))
+        {
+            throw css::deployment::DeploymentException(
+                msg, static_cast<OWeakObject *>(this), e);
+        }
+    }
+    return ret;
+}
+
+
+bool BackendImpl::PackageImpl::checkDependencies(
+    css::uno::Reference< css::ucb::XCommandEnvironment > const & environment,
+    DescriptionInfoset const & description)
+{
+    css::uno::Sequence< css::uno::Reference< css::xml::dom::XElement > >
+        unsatisfied(dp_misc::Dependencies::check(description));
+
+    if (!unsatisfied.hasElements()) {
+        return true;
+    } else {
+        OUString msg(
+            "unsatisfied dependencies");
+        Any e(
+            css::deployment::DependencyException(
+                msg, static_cast<OWeakObject *>(this), unsatisfied));
+        if (!interactContinuation(
+                e, cppu::UnoType< css::task::XInteractionApprove >::get(),
+                environment, nullptr, nullptr))
+        {
+            throw css::deployment::DeploymentException(
+                msg, static_cast<OWeakObject *>(this), e);
+        }
+        return false;
+    }
+}
+
+bool BackendImpl::PackageImpl::checkLicense(
+    css::uno::Reference< css::ucb::XCommandEnvironment > const & xCmdEnv,
+    DescriptionInfoset const & info, bool alreadyInstalled)
+{
+    try
+    {
+        ::std::optional<SimpleLicenseAttributes> simplLicAttr
+            = info.getSimpleLicenseAttributes();
+        if (! simplLicAttr)
+            return true;
+        OUString sLic = info.getLocalizedLicenseURL();
+        //If we do not get a localized licence then there is an error in the description.xml
+        //This should be handled by using a validating parser. Therefore we assume that no
+        //license is available.
+        if (sLic.isEmpty())
+            throw css::deployment::DeploymentException(
+                "Could not obtain path to license. Possible error in description.xml", nullptr, Any());
+        OUString sHref = m_url_expanded + "/" + sLic;
+        OUString sLicense = getTextFromURL(xCmdEnv, sHref);
+        ////determine who has to agree to the license
+        //check correct value for attribute
+        if ( simplLicAttr->acceptBy != "user" && simplLicAttr->acceptBy != "admin")
+            throw css::deployment::DeploymentException(
+                "Could not obtain attribute simple-license@accept-by or it has no valid value", nullptr, Any());
+
+
+        //Only use interaction if there is no version of this extension already installed
+        //and the suppress-on-update flag is not set for the new extension
+        // alreadyInstalled | bSuppressOnUpdate | show license
+
+        //      0     |      0            |     1
+        //      0     |      1            |     1
+        //      1     |      0            |     1
+        //      1     |      1            |     0
+
+        if ( !(alreadyInstalled && simplLicAttr->suppressOnUpdate))
+        {
+            css::deployment::LicenseException licExc(
+                OUString(), nullptr, getDisplayName(), sLicense,
+                simplLicAttr->acceptBy);
+            bool approve = false;
+            bool abort = false;
+            if (! interactContinuation(
+                Any(licExc), cppu::UnoType<task::XInteractionApprove>::get(), xCmdEnv, &approve, &abort ))
+                throw css::deployment::DeploymentException(
+                    "Could not interact with user.", nullptr, Any());
+
+            return approve;
+        }
+        return true;
+    } catch (const css::ucb::CommandFailedException&) {
+        throw;
+    } catch (const css::ucb::CommandAbortedException&) {
+        throw;
+    } catch (const css::deployment::DeploymentException&) {
+        throw;
+    } catch (const css::uno::RuntimeException&) {
+        throw;
+    } catch (const css::uno::Exception&) {
+        Any anyExc = cppu::getCaughtException();
+        throw css::deployment::DeploymentException("Unexpected exception", nullptr, anyExc);
+    }
+}
+
+::sal_Int32 BackendImpl::PackageImpl::checkPrerequisites(
+        const css::uno::Reference< css::task::XAbortChannel >&,
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv,
+        sal_Bool alreadyInstalled)
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    DescriptionInfoset info = getDescriptionInfoset();
+    if (!info.hasDescription())
+        return 0;
+
+    //always return LICENSE as long as the user did not accept the license
+    //so that XExtensionManager::checkPrerequisitesAndEnable will again
+    //check the license
+    if (!checkPlatform(xCmdEnv))
+        return deployment::Prerequisites::PLATFORM |
+            deployment::Prerequisites::LICENSE;
+    else if(!checkDependencies(xCmdEnv, info))
+        return deployment::Prerequisites::DEPENDENCIES |
+            deployment::Prerequisites::LICENSE;
+    else if(!checkLicense(xCmdEnv, info, alreadyInstalled))
+        return deployment::Prerequisites::LICENSE;
+    else
+        return 0;
+}
+
+sal_Bool BackendImpl::PackageImpl::checkDependencies(
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    DescriptionInfoset info = getDescriptionInfoset();
+    if (!info.hasDescription())
+        return true;
+
+    return checkDependencies(xCmdEnv, info);
+}
+
+beans::Optional<OUString> BackendImpl::PackageImpl::getIdentifier()
+{
+    OUString identifier;
+    if (m_bRemoved)
+        identifier = m_identifier;
+    else
+        identifier = dp_misc::generateIdentifier(
+            getDescriptionInfoset().getIdentifier(), m_name);
+
+    return beans::Optional<OUString>(
+        true, identifier);
+}
+
+OUString BackendImpl::PackageImpl::getVersion()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return getDescriptionInfoset().getVersion();
+}
+
+Sequence<OUString> BackendImpl::PackageImpl::getUpdateInformationURLs()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return getDescriptionInfoset().getUpdateInformationUrls();
+}
+
+beans::StringPair BackendImpl::PackageImpl::getPublisherInfo()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    std::pair< OUString, OUString > aInfo = getDescriptionInfoset().getLocalizedPublisherNameAndURL();
+    beans::StringPair aStrPair( aInfo.first, aInfo.second );
+    return aStrPair;
+}
+
+
+uno::Reference< graphic::XGraphic > BackendImpl::PackageImpl::getIcon( sal_Bool bHighContrast )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    uno::Reference< graphic::XGraphic > xGraphic;
+
+    OUString aIconURL = getDescriptionInfoset().getIconURL( bHighContrast );
+    if ( !aIconURL.isEmpty() )
+    {
+        OUString aFullIconURL = m_url_expanded + "/" + aIconURL;
+
+        uno::Reference< XComponentContext > xContext( getMyBackend()->getComponentContext() );
+        uno::Reference< graphic::XGraphicProvider > xGraphProvider( graphic::GraphicProvider::create(xContext) );
+
+        uno::Sequence< beans::PropertyValue > aMediaProps{ comphelper::makePropertyValue(
+            "URL", aFullIconURL) };
+        xGraphic = xGraphProvider->queryGraphic( aMediaProps );
+    }
+
+    return xGraphic;
+}
+
+
+void BackendImpl::PackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool startup,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    const Sequence< Reference<deployment::XPackage> > bundle(
+        getBundle( abortChannel, xCmdEnv ) );
+
+    if (doRegisterPackage)
+    {
+        ExtensionBackendDb::Data data;
+        const sal_Int32 len = bundle.getLength();
+        for ( sal_Int32 pos = 0; pos < len; ++pos )
+        {
+            checkAborted(abortChannel);
+            Reference<deployment::XPackage> const & xPackage = bundle[ pos ];
+            Reference<task::XAbortChannel> xSubAbortChannel(
+                xPackage->createAbortChannel() );
+            AbortChannel::Chain chain( abortChannel, xSubAbortChannel );
+            try {
+                xPackage->registerPackage( startup, xSubAbortChannel, xCmdEnv );
+            }
+            catch (const Exception &)
+            {
+               //We even try a rollback if the user cancelled the action (CommandAbortedException)
+                //in order to prevent invalid database entries.
+                Any exc( ::cppu::getCaughtException() );
+                // try to handle exception, notify:
+                bool approve = false, abort = false;
+                if (! interactContinuation(
+                        Any( lang::WrappedTargetException(
+                                 "bundle item registration error!",
+                                 static_cast<OWeakObject *>(this), exc ) ),
+                        cppu::UnoType<task::XInteractionApprove>::get(), xCmdEnv,
+                        &approve, &abort )) {
+                    OSL_ASSERT( !approve && !abort );
+                    if (m_legacyBundle) // default for legacy packages: ignore
+                        continue;
+                    // no selection at all, so rethrow;
+                    // no C++ rethrow after getCaughtException(),
+                    // see cppuhelper/exc_hlp.hxx:
+                    ::cppu::throwException(exc);
+                }
+                if (approve && !abort) // ignore error, just continue
+                    continue;
+
+                {
+                    ProgressLevel progress( xCmdEnv, "rollback..." );
+                    // try rollback
+                    for ( ; pos--; )
+                    {
+                        try {
+                            bundle[ pos ]->revokePackage(
+                                startup, xSubAbortChannel, xCmdEnv );
+                        }
+                        catch (const Exception &)
+                        {
+                            TOOLS_WARN_EXCEPTION( "desktop", "" );
+                            // ignore any errors of rollback
+                        }
+                    }
+                    progress.update( "rollback finished." );
+                }
+
+                deployment::DeploymentException dpExc;
+                if (exc >>= dpExc) {
+                    throw ucb::CommandFailedException(
+                        dpExc.Message, dpExc.Context, dpExc.Cause );
+                }
+                else {
+                    // rethrow CommandFailedException
+                    ::cppu::throwException(exc);
+                }
+            }
+            data.items.emplace_back(xPackage->getURL(),
+                                 xPackage->getPackageType()->getMediaType());
+        }
+        getMyBackend()->addDataToDb(getURL(), data);
+    }
+    else
+    {
+        // revoke in reverse order:
+        for ( sal_Int32 pos = bundle.getLength(); pos--; )
+        {
+            checkAborted(abortChannel);
+            Reference<deployment::XPackage> const & xPackage = bundle[ pos ];
+            Reference<task::XAbortChannel> xSubAbortChannel(
+                xPackage->createAbortChannel() );
+            AbortChannel::Chain chain( abortChannel, xSubAbortChannel );
+            try {
+                bundle[ pos ]->revokePackage(
+                    startup, xSubAbortChannel, xCmdEnv );
+            }
+            catch (const RuntimeException &) {
+                throw;
+            }
+            catch (const ucb::CommandAbortedException &) {
+                throw;
+            }
+            catch (const Exception &) {
+                // CommandFailedException, DeploymentException:
+                Any exc( ::cppu::getCaughtException() );
+                // try to handle exception, notify:
+                bool approve = false, abort = false;
+                if (! interactContinuation(
+                        Any( lang::WrappedTargetException(
+                                 "bundle item revocation error!",
+                                 static_cast<OWeakObject *>(this), exc ) ),
+                        cppu::UnoType<task::XInteractionApprove>::get(), xCmdEnv,
+                        &approve, &abort )) {
+                    OSL_ASSERT( !approve && !abort );
+                    if (m_legacyBundle) // default for legacy packages: ignore
+                        continue;
+                    // no selection at all, so rethrow
+                    // no C++ rethrow after getCaughtException(),
+                    // see cppuhelper/exc_hlp.hxx:
+                    ::cppu::throwException(exc);
+                }
+                // ignore errors when revoking, although abort may have been
+                // selected
+            }
+        }
+        getMyBackend()->revokeEntryFromDb(getURL());
+    }
+}
+
+
+OUString BackendImpl::PackageImpl::getDescription()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    const OUString sRelativeURL(getDescriptionInfoset().getLocalizedDescriptionURL());
+    OUString sDescription;
+    if (!sRelativeURL.isEmpty())
+    {
+        OUString sURL = m_url_expanded + "/" + sRelativeURL;
+
+        try
+        {
+            sDescription = getTextFromURL( css::uno::Reference< css::ucb::XCommandEnvironment >(), sURL );
+        }
+        catch ( const css::deployment::DeploymentException& )
+        {
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+    }
+
+    if (!sDescription.isEmpty())
+        return sDescription;
+    return m_oldDescription;
+}
+
+
+OUString BackendImpl::PackageImpl::getLicenseText()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    OUString sLicense;
+    DescriptionInfoset aInfo = getDescriptionInfoset();
+
+    ::std::optional< SimpleLicenseAttributes > aSimplLicAttr = aInfo.getSimpleLicenseAttributes();
+    if ( aSimplLicAttr )
+    {
+        OUString aLicenseURL = aInfo.getLocalizedLicenseURL();
+
+        if ( !aLicenseURL.isEmpty() )
+        {
+            OUString aFullURL = m_url_expanded + "/" + aLicenseURL;
+            sLicense = getTextFromURL( Reference< ucb::XCommandEnvironment >(), aFullURL);
+        }
+    }
+
+    return sLicense;
+}
+
+
+void BackendImpl::PackageImpl::exportTo(
+    OUString const & destFolderURL, OUString const & newTitle,
+    sal_Int32 nameClashAction, Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    ::ucbhelper::Content sourceContent(
+        m_url_expanded, xCmdEnv, getMyBackend()->getComponentContext() );
+    OUString title(newTitle);
+    if (title.isEmpty())
+        sourceContent.getPropertyValue( "Title" ) >>= title;
+    OUString destURL( makeURL( destFolderURL, ::rtl::Uri::encode(
+                                   title, rtl_UriCharClassPchar,
+                                   rtl_UriEncodeIgnoreEscapes,
+                                   RTL_TEXTENCODING_UTF8 ) ) );
+
+    if (nameClashAction == ucb::NameClash::ASK)
+    {
+        if (create_ucb_content(
+                nullptr, destURL, xCmdEnv, false /* no throw */ )) {
+            bool replace = false, abort = false;
+            if (! interactContinuation(
+                    Any( ucb::NameClashResolveRequest(
+                             "file already exists: " + title,
+                             static_cast<OWeakObject *>(this),
+                             task::InteractionClassification_QUERY,
+                             destFolderURL, title, OUString() ) ),
+                    cppu::UnoType<ucb::XInteractionReplaceExistingData>::get(), xCmdEnv,
+                    &replace, &abort ) || !replace) {
+                return;
+            }
+        }
+    }
+    else if (nameClashAction != ucb::NameClash::OVERWRITE) {
+        throw ucb::CommandFailedException("unsupported nameClashAction!",
+            static_cast<OWeakObject *>(this), Any() );
+    }
+    erase_path( destURL, xCmdEnv );
+
+    OUString destFolder =
+        "vnd.sun.star.zip://" +
+        ::rtl::Uri::encode( destURL,
+                            rtl_UriCharClassRegName,
+                            rtl_UriEncodeIgnoreEscapes,
+                            RTL_TEXTENCODING_UTF8 ) +
+        "/";
+
+    ::ucbhelper::Content destFolderContent(
+        destFolder, xCmdEnv, getMyBackend()->getComponentContext() );
+    {
+        // transfer every item of folder into zip:
+        Reference<sdbc::XResultSet> xResultSet(
+            sourceContent.createCursor( Sequence<OUString>() ) );
+        ProgressLevel progress( xCmdEnv, OUString() );
+        while (xResultSet->next())
+        {
+            ::ucbhelper::Content subContent(
+                Reference<ucb::XContentAccess>(
+                    xResultSet, UNO_QUERY_THROW )->queryContent(),
+                xCmdEnv, getMyBackend()->getComponentContext() );
+            destFolderContent.transferContent(
+                    subContent, ::ucbhelper::InsertOperation::Copy,
+                    OUString(), ucb::NameClash::OVERWRITE );
+            progress.update( Any() ); // animating progress bar
+        }
+    }
+
+    // assure META-INF folder:
+    ::ucbhelper::Content metainfFolderContent;
+    create_folder( &metainfFolderContent,
+                   makeURL( destFolderContent.getURL(), "META-INF" ),
+                   xCmdEnv );
+
+    if (m_legacyBundle)
+    {
+        // easy to migrate legacy bundles to new format:
+        // just export them once using a .oxt name!
+        // set detected media-types of any bundle item:
+
+        // collect all manifest entries:
+        Sequence< Reference<deployment::XPackage> > bundle;
+        try {
+            bundle = getBundle( Reference<task::XAbortChannel>(), xCmdEnv );
+        }
+        // xxx todo: think about exception specs:
+        catch (const deployment::DeploymentException &) {
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+        catch (const lang::IllegalArgumentException &) {
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+
+        std::vector< Sequence<beans::PropertyValue> > manifest;
+        manifest.reserve( bundle.getLength() );
+        sal_Int32 baseURLlen = m_url_expanded.getLength();
+        Reference<deployment::XPackage> const *pbundle = bundle.getConstArray();
+        static const OUStringLiteral strMediaType( u"MediaType" );
+        static const OUStringLiteral strFullPath( u"FullPath" );
+        static const OUStringLiteral strIsFolder( u"IsFolder" );
+        for ( sal_Int32 pos = bundle.getLength(); pos--; )
+        {
+            Reference<deployment::XPackage> const & xPackage = pbundle[ pos ];
+            OUString url_( expandUnoRcUrl( xPackage->getURL() ) );
+            OSL_ASSERT( url_.getLength() >= baseURLlen );
+            OUString fullPath;
+            if (url_.getLength() > baseURLlen)
+                fullPath = url_.copy( baseURLlen + 1 );
+            ::ucbhelper::Content ucbContent(
+                url_, xCmdEnv, getMyBackend()->getComponentContext() );
+            if (ucbContent.getPropertyValue(strIsFolder).get<bool>())
+                fullPath += "/";
+            Sequence<beans::PropertyValue> attribs( 2 );
+            beans::PropertyValue * pattribs = attribs.getArray();
+            pattribs[ 0 ].Name = strFullPath;
+            pattribs[ 0 ].Value <<= fullPath;
+            pattribs[ 1 ].Name = strMediaType;
+            const Reference<deployment::XPackageTypeInfo> xPackageType(
+                xPackage->getPackageType() );
+            OUString mediaType;
+            OSL_ASSERT( xPackageType.is() );
+            if (xPackageType.is())
+                mediaType = xPackageType->getMediaType();
+            else
+                mediaType = "unknown";
+            pattribs[ 1 ].Value <<= mediaType;
+            manifest.push_back( attribs );
+        }
+
+        // write into pipe:
+        Reference<XComponentContext> xContext(
+            getMyBackend()->getComponentContext() );
+        Reference<packages::manifest::XManifestWriter> xManifestWriter =
+            packages::manifest::ManifestWriter::create( xContext );
+        Reference<io::XOutputStream> xPipe( io::Pipe::create(xContext), UNO_QUERY_THROW );
+        xManifestWriter->writeManifestSequence(
+            xPipe, comphelper::containerToSequence(manifest) );
+
+        // write buffered pipe data to content:
+        ::ucbhelper::Content manifestContent(
+            makeURL( metainfFolderContent.getURL(), "manifest.xml" ),
+            xCmdEnv, getMyBackend()->getComponentContext() );
+        manifestContent.writeStream(
+            Reference<io::XInputStream>( xPipe, UNO_QUERY_THROW ),
+            true /* replace existing */ );
+    }
+    else
+    {
+        bool bSuccess = false;
+        try
+        {
+            // overwrite manifest.xml:
+            ::ucbhelper::Content manifestContent;
+            if ( ! create_ucb_content(
+                &manifestContent,
+                makeURL( m_url_expanded, "META-INF/manifest.xml" ),
+                xCmdEnv, false ) )
+            {
+                OSL_FAIL( "### missing META-INF/manifest.xml file!" );
+                return;
+            }
+
+            metainfFolderContent.transferContent(
+                  manifestContent, ::ucbhelper::InsertOperation::Copy,
+                  OUString(), ucb::NameClash::OVERWRITE );
+            bSuccess = true;
+        }
+        catch (const css::ucb::ContentCreationException &)
+        {
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "exception on overwriting manifest");
+        }
+
+        if (!bSuccess)
+            throw RuntimeException( "UCB transferContent() failed!",
+                                    static_cast<OWeakObject *>(this) );
+    }
+
+    // xxx todo: maybe obsolete in the future
+    try {
+        destFolderContent.executeCommand( "flush", Any() );
+    }
+    catch (const ucb::UnsupportedCommandException &) {
+    }
+}
+
+
+sal_Bool BackendImpl::PackageImpl::isBundle()
+{
+    return true;
+}
+
+
+Sequence< Reference<deployment::XPackage> > BackendImpl::PackageImpl::getBundle(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    Sequence< Reference<deployment::XPackage> > * pBundle = m_pBundle;
+    if (pBundle == nullptr)
+    {
+        t_packagevec bundle;
+        if (m_bRemoved)
+        {
+            bundle = getPackagesFromDb(xCmdEnv);
+        }
+        else
+        {
+            try {
+                if (m_legacyBundle)
+                {
+                    // .zip legacy packages allow script.xlb, dialog.xlb in bundle
+                    // root folder:
+                    OUString mediaType;
+                    // probe for script.xlb:
+                    if (create_ucb_content(
+                            nullptr, makeURL( m_url_expanded, "script.xlb" ),
+                            xCmdEnv, false /* no throw */ )) {
+                        mediaType = "application/vnd.sun.star.basic-library";
+                    }
+                    // probe for dialog.xlb:
+                    else if (create_ucb_content(
+                                 nullptr, makeURL( m_url_expanded, "dialog.xlb" ),
+                                 xCmdEnv, false /* no throw */ ))
+                        mediaType = "application/vnd.sun.star.dialog-library";
+
+                    if (!mediaType.isEmpty()) {
+                        const Reference<deployment::XPackage> xPackage(
+                            bindBundleItem( getURL(), mediaType, false, OUString(),
+                                            xCmdEnv ) );
+                        if (xPackage.is())
+                            bundle.push_back( xPackage );
+                        // continue scanning:
+                    }
+                    scanLegacyBundle( bundle, getURL(),
+                                      AbortChannel::get(xAbortChannel), xCmdEnv );
+                }
+                else
+                {
+                    // .oxt:
+                    scanBundle( bundle, AbortChannel::get(xAbortChannel), xCmdEnv );
+                }
+
+            }
+            catch (const RuntimeException &) {
+                throw;
+            }
+            catch (const ucb::CommandFailedException &) {
+                throw;
+            }
+            catch (const ucb::CommandAbortedException &) {
+                throw;
+            }
+            catch (const deployment::DeploymentException &) {
+                throw;
+            }
+            catch (const Exception &) {
+                Any exc( ::cppu::getCaughtException() );
+                throw deployment::DeploymentException(
+                    "error scanning bundle: " + getURL(),
+                    static_cast<OWeakObject *>(this), exc );
+            }
+        }
+
+        // sort: schema before config data, typelibs before components:
+        Sequence< Reference<deployment::XPackage> > ret( bundle.size() );
+        Reference<deployment::XPackage> * pret = ret.getArray();
+        sal_Int32 lower_end = 0;
+        sal_Int32 upper_end = ret.getLength();
+        for (auto const& elem : bundle)
+        {
+            const Reference<deployment::XPackageTypeInfo> xPackageType(
+                elem->getPackageType() );
+            OSL_ASSERT( xPackageType.is() );
+            if (xPackageType.is())
+            {
+                const OUString mediaType( xPackageType->getMediaType() );
+                OUString type, subType;
+                INetContentTypeParameterList params;
+                if (INetContentTypes::parse( mediaType, type, subType, &params ) &&
+                    type.equalsIgnoreAsciiCase("application") &&
+                    (subType.equalsIgnoreAsciiCase( "vnd.sun.star.uno-component") ||
+                     subType.equalsIgnoreAsciiCase( "vnd.sun.star.configuration-data")))
+                {
+                    --upper_end;
+                    pret[ upper_end ] = elem;
+                    continue;
+                }
+            }
+            pret[ lower_end ] = elem;
+            ++lower_end;
+        }
+        OSL_ASSERT( lower_end == upper_end );
+
+        const ::osl::MutexGuard guard( m_aMutex );
+        pBundle = m_pBundle;
+        if (pBundle == nullptr) {
+            m_bundle = ret;
+            pBundle = &m_bundle;
+            OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
+            m_pBundle = pBundle;
+        }
+    }
+    else {
+        OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
+    }
+    return *pBundle;
+}
+
+bool isBundle_( std::u16string_view mediaType )
+{
+    // xxx todo: additional parsing?
+    return !mediaType.empty() &&
+        (o3tl::matchIgnoreAsciiCase( mediaType, u"application/vnd.sun.star.package-bundle") ||
+         o3tl::matchIgnoreAsciiCase( mediaType, u"application/vnd.sun.star.legacy-package-bundle"));
+}
+
+
+Reference<deployment::XPackage> BackendImpl::PackageImpl::bindBundleItem(
+    OUString const & url, OUString const & mediaType,
+    bool bRemoved, OUString const & identifier,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+    bool notifyDetectionError )
+{
+    // ignore any nested bundles:
+    if (isBundle_(mediaType))
+        return Reference<deployment::XPackage>();
+
+    Reference<deployment::XPackage>xPackage;
+    try {
+        try {
+            xPackage.set( getMyBackend()->m_xRootRegistry->bindPackage(
+                              url, mediaType, bRemoved, identifier, xCmdEnv ) );
+            OSL_ASSERT( xPackage.is() );
+        } catch (css::lang::IllegalArgumentException & e) {
+            css::uno::Any exc(cppu::getCaughtException());
+            throw css::lang::WrappedTargetException(
+                "wrapped: " + e.Message, e.Context, exc);
+        }
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const ucb::CommandFailedException &) {
+        // ignore already handled error
+    }
+    catch (const Exception &) {
+        const Any exc( ::cppu::getCaughtException() );
+        if (notifyDetectionError ||
+            !exc.isExtractableTo( cppu::UnoType<lang::IllegalArgumentException>::get()) )
+        {
+            (void)interactContinuation(
+                Any( lang::WrappedTargetException("bundle item error!",
+                         static_cast<OWeakObject *>(this), exc ) ),
+                cppu::UnoType<task::XInteractionApprove>::get(), xCmdEnv, nullptr, nullptr );
+        }
+    }
+
+    if (xPackage.is()) {
+        const Reference<deployment::XPackageTypeInfo> xPackageType(
+            xPackage->getPackageType() );
+        OSL_ASSERT( xPackageType.is() );
+        // ignore any nested bundles:
+        if (xPackageType.is() && isBundle_( xPackageType->getMediaType() ))
+            xPackage.clear();
+    }
+    return xPackage;
+}
+
+
+void BackendImpl::PackageImpl::scanBundle(
+    t_packagevec & bundle,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    OSL_ASSERT( !m_legacyBundle );
+
+    OUString mfUrl( makeURL( m_url_expanded, "META-INF/manifest.xml" ) );
+    ::ucbhelper::Content manifestContent;
+    if (! create_ucb_content(
+            &manifestContent, mfUrl, xCmdEnv, false /* no throw */ ))
+    {
+        SAL_WARN(
+            "desktop.deployment",
+            "cannot create UCB Content for <" << mfUrl << ">" );
+        return;
+    }
+
+
+    const LanguageTag& officeLocale = getOfficeLanguageTag();
+    const std::vector< OUString > officeFallbacks( officeLocale.getFallbackStrings( true));
+    const size_t nPenaltyMax = std::numeric_limits<size_t>::max();
+    size_t descrPenalty = nPenaltyMax;
+    OUString descrFile;
+
+    const Reference<XComponentContext> xContext(
+        getMyBackend()->getComponentContext() );
+    Reference<packages::manifest::XManifestReader> xManifestReader =
+        packages::manifest::ManifestReader::create( xContext );
+    const Sequence< Sequence<beans::PropertyValue> > manifestSeq(
+        xManifestReader->readManifestSequence( manifestContent.openStream() ) );
+    const OUString packageRootURL( getURL() );
+    for ( sal_Int32 pos = manifestSeq.getLength(); pos--; )
+    {
+        OUString fullPath, mediaType;
+        Sequence<beans::PropertyValue> const & attribs = manifestSeq[ pos ];
+        for ( sal_Int32 i = attribs.getLength(); i--; )
+        {
+            if (!(fullPath.isEmpty() || mediaType.isEmpty()))
+                break;
+            if ( attribs[i].Name == "FullPath" )
+                attribs[i].Value >>= fullPath;
+            else if ( attribs[i].Name == "MediaType" )
+                attribs[i].Value >>= mediaType;
+        }
+
+        if ( fullPath.isEmpty() || mediaType.isEmpty() || mediaType == "text/xml" )// opt: exclude common text/xml
+            continue;
+
+        OUString type, subType;
+        INetContentTypeParameterList params;
+        if (! INetContentTypes::parse( mediaType, type, subType, &params ))
+            continue;
+
+        {
+            auto const iter = params.find("platform");
+            if (iter != params.end() && !platform_fits(iter->second.m_sValue))
+                continue;
+        }
+        const OUString url( makeURL( packageRootURL, fullPath ) );
+
+        // check for bundle description:
+        if (type.equalsIgnoreAsciiCase("application") &&
+            subType.equalsIgnoreAsciiCase( "vnd.sun.star.package-bundle-description"))
+        {
+            // check locale:
+            auto const iter = params.find("locale");
+            if (iter == params.end())
+            {
+                if (descrFile.isEmpty())
+                    descrFile = url;
+            }
+            else {
+                // match best locale:
+                LanguageTag descrTag(iter->second.m_sValue);
+                if (officeLocale.getLanguage() == descrTag.getLanguage())
+                {
+                    size_t nPenalty = nPenaltyMax;
+                    const std::vector< OUString > descrFallbacks( descrTag.getFallbackStrings( true));
+                    for (size_t o=0; o < officeFallbacks.size() && nPenalty == nPenaltyMax; ++o)
+                    {
+                        for (size_t d=0; d < descrFallbacks.size() && nPenalty == nPenaltyMax; ++d)
+                        {
+                            if (officeFallbacks[o] == descrFallbacks[d])
+                            {
+                                // The last fallbacks are always language-only
+                                // fallbacks, so we _will_ have _some_ match if
+                                // we ever entered the overall if() condition.
+                                nPenalty = o * 1000 + d;
+                                if (descrPenalty > nPenalty)
+                                {
+                                    descrPenalty = nPenalty;
+                                    descrFile = url;
+                                }
+                            }
+                        }
+                    }
+                }
+                // TODO: we could break here if descrPenalty==0 for an exact
+                // match of officeLocale, but the previous code didn't; are
+                // there side effects?
+            }
+            continue;
+        }
+
+        checkAborted( abortChannel );
+
+        //We make sure that we only create one XPackage for a particular URL.
+        //Sometime programmers insert the same URL several times in the manifest
+        //which may lead to DisposedExceptions.
+        if (std::none_of(bundle.begin(), bundle.end(), XPackage_eq(url)))
+        {
+            const Reference<deployment::XPackage> xPackage(
+                bindBundleItem( url, mediaType, false, OUString(), xCmdEnv ) );
+            if (xPackage.is())
+                bundle.push_back( xPackage );
+        }
+        else
+        {
+            SAL_WARN("desktop.deployment", "manifest.xml contains a duplicate entry (from " << url << ")");
+        }
+    }
+
+    if (descrFile.isEmpty())
+        return;
+
+    ::ucbhelper::Content descrFileContent;
+    if (!create_ucb_content( &descrFileContent, descrFile,
+                            xCmdEnv, false /* no throw */ ))
+        return;
+
+    // patch description:
+    std::vector<sal_Int8> bytes( readFile( descrFileContent ) );
+    OUStringBuffer buf;
+    if ( !bytes.empty() )
+    {
+        buf.append( OUString( reinterpret_cast<char const *>(
+                                  bytes.data() ),
+                              bytes.size(), RTL_TEXTENCODING_UTF8 ) );
+    }
+    else
+    {
+        buf.append( Package::getDescription() );
+    }
+    m_oldDescription = buf.makeStringAndClear();
+}
+
+
+void BackendImpl::PackageImpl::scanLegacyBundle(
+    t_packagevec & bundle,
+    OUString const & url,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+    bool skip_registration )
+{
+    ::ucbhelper::Content ucbContent(
+        url, xCmdEnv, getMyBackend()->getComponentContext() );
+
+    // check for platform paths:
+    const OUString title( StrTitle::getTitle( ucbContent ) );
+    if (title.endsWithIgnoreAsciiCase( ".plt" ) &&
+        !platform_fits( title.subView( 0, title.getLength() - 4 ) )) {
+        return;
+    }
+    if (title.endsWithIgnoreAsciiCase("skip_registration") )
+        skip_registration = true;
+
+    Sequence<OUString> ar { OUString("Title"), OUString("IsFolder") };
+    Reference<sdbc::XResultSet> xResultSet( ucbContent.createCursor( ar ) );
+    while (xResultSet->next())
+    {
+        checkAborted( abortChannel );
+
+        const Reference<sdbc::XRow> xRow( xResultSet, UNO_QUERY_THROW );
+        const OUString title_enc( ::rtl::Uri::encode(
+                                      xRow->getString( 1 /* Title */ ),
+                                      rtl_UriCharClassPchar,
+                                      rtl_UriEncodeIgnoreEscapes,
+                                      RTL_TEXTENCODING_UTF8 ) );
+        const OUString path( makeURL( url, title_enc ) );
+
+        OUString mediaType;
+        const Reference<deployment::XPackage> xPackage(
+            bindBundleItem( path, OUString() /* detect */, false, OUString(),
+                            xCmdEnv, false /* ignore detection errors */ ) );
+        if (xPackage.is()) {
+            const Reference<deployment::XPackageTypeInfo> xPackageType(
+                xPackage->getPackageType() );
+            OSL_ASSERT( xPackageType.is() );
+            if (xPackageType.is())
+                mediaType = xPackageType->getMediaType();
+
+            if (skip_registration &&
+                // xxx todo: additional parsing?
+                mediaType.matchIgnoreAsciiCase("application/vnd.sun.star.uno-component"))
+                continue;
+
+            bundle.push_back( xPackage );
+        }
+
+        if (mediaType.isEmpty() ||
+            // script.xlb, dialog.xlb can be met everywhere:
+            mediaType.matchIgnoreAsciiCase("application/vnd.sun.star.basic-library") ||
+            mediaType.matchIgnoreAsciiCase("application/vnd.sun.star.dialog-library"))
+        {
+            if (xRow->getBoolean( 2 /* IsFolder */ )) { // recurse into folder:
+                scanLegacyBundle(
+                    bundle, path, abortChannel, xCmdEnv, skip_registration );
+            }
+        }
+    }
+}
+
+OUString BackendImpl::PackageImpl::getDisplayName()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    OUString sName = getDescriptionInfoset().getLocalizedDisplayName();
+    if (sName.isEmpty())
+        return m_displayName;
+    else
+        return sName;
+}
+
+std::vector<Reference<deployment::XPackage> >
+BackendImpl::PackageImpl::getPackagesFromDb(
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    std::vector<Reference<deployment::XPackage> > retVector;
+
+    for (auto const& item : m_dbData.items)
+    {
+        Reference<deployment::XPackage> xExtension =
+            bindBundleItem(item.first, item.second, true, m_identifier, xCmdEnv);
+        OSL_ASSERT(xExtension.is());
+        if (xExtension.is())
+            retVector.push_back(xExtension);
+    }
+
+    return retVector;
+}
+
+} // anon namespace
+
+
+Reference<deployment::XPackageRegistry> create(
+    Reference<deployment::XPackageRegistry> const & xRootRegistry,
+    OUString const & context, OUString const & cachePath,
+    Reference<XComponentContext> const & xComponentContext )
+{
+    Sequence<Any> args(cachePath.isEmpty() ? 1 : 3 );
+    auto pArgs = args.getArray();
+    pArgs[ 0 ] <<= context;
+    if (!cachePath.isEmpty()) {
+        pArgs[ 1 ] <<= cachePath;
+        pArgs[ 2 ] <<= false; // readOnly
+    }
+    return new BackendImpl( args, xComponentContext, xRootRegistry );
+}
+
+} // namespace dp_registry
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/script/dp_lib_container.cxx b/desktop/source/deployment/registry/script/dp_lib_container.cxx
new file mode 100644
index 000000000..3a6f30253
--- /dev/null
+++ b/desktop/source/deployment/registry/script/dp_lib_container.cxx
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+
+#include <strings.hrc>
+#include <dp_resource.h>
+#include <dp_shared.hxx>
+#include <dp_xml.h>
+#include "dp_lib_container.h"
+
+#include <rtl/ustring.hxx>
+#include <ucbhelper/content.hxx>
+#include <xmlscript/xmllib_imexp.hxx>
+
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend::script {
+
+namespace {
+    OUString StrCannotDetermineLibName() { return DpResId(RID_STR_CANNOT_DETERMINE_LIBNAME); }
+}
+
+OUString LibraryContainer::get_libname(
+    OUString const & url,
+    Reference<XCommandEnvironment> const & xCmdEnv,
+    Reference<XComponentContext> const & xContext )
+{
+    ::xmlscript::LibDescriptor import;
+    ::ucbhelper::Content ucb_content( url, xCmdEnv, xContext );
+    xml_parse( ::xmlscript::importLibrary( import ), ucb_content, xContext );
+
+    if (import.aName.isEmpty()) {
+        throw Exception( StrCannotDetermineLibName(),
+                         Reference<XInterface>() );
+    }
+    return import.aName;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/script/dp_lib_container.h b/desktop/source/deployment/registry/script/dp_lib_container.h
new file mode 100644
index 000000000..fbbedf866
--- /dev/null
+++ b/desktop/source/deployment/registry/script/dp_lib_container.h
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/uno/Reference.hxx>
+
+namespace com::sun::star {
+    namespace uno {
+        class XComponentContext;
+    }
+    namespace ucb {
+        class XCommandEnvironment;
+    }
+}
+
+
+namespace dp_registry::backend::script {
+
+
+class LibraryContainer
+{
+public:
+    static OUString get_libname(
+        OUString const & url,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+        css::uno::Reference<css::uno::XComponentContext> const & xContext );
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/script/dp_script.cxx b/desktop/source/deployment/registry/script/dp_script.cxx
new file mode 100644
index 000000000..47e41a364
--- /dev/null
+++ b/desktop/source/deployment/registry/script/dp_script.cxx
@@ -0,0 +1,480 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <strings.hrc>
+#include "dp_lib_container.h"
+#include <dp_backend.h>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <ucbhelper/content.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <svl/inettype.hxx>
+#include <com/sun/star/util/XUpdatable.hpp>
+#include <com/sun/star/script/XLibraryContainer3.hpp>
+#include <memory>
+#include <string_view>
+
+#include "dp_scriptbackenddb.hxx"
+#include <cppuhelper/supportsservice.hxx>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend::script {
+namespace {
+
+typedef ::cppu::ImplInheritanceHelper<
+    ::dp_registry::backend::PackageRegistryBackend, util::XUpdatable > t_helper;
+
+class BackendImpl : public t_helper
+{
+    class PackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        const OUString m_scriptURL;
+        const OUString m_dialogURL;
+        OUString m_dialogName;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    public:
+        PackageImpl(
+            ::rtl::Reference<BackendImpl> const & myBackend,
+            OUString const & url,
+            Reference<XCommandEnvironment> const &xCmdEnv,
+            OUString const & scriptURL, OUString const & dialogURL,
+            bool bRemoved, OUString const & identifier);
+    };
+    friend class PackageImpl;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    void addDataToDb(OUString const & url);
+    bool hasActiveEntry(std::u16string_view url);
+    void revokeEntryFromDb(std::u16string_view url);
+
+    const Reference<deployment::XPackageTypeInfo> m_xBasicLibTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xDialogLibTypeInfo;
+    Sequence< Reference<deployment::XPackageTypeInfo> > m_typeInfos;
+    std::unique_ptr<ScriptBackendDb> m_backendDb;
+public:
+    BackendImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XUpdatable
+    virtual void SAL_CALL update() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+};
+
+
+BackendImpl::PackageImpl::PackageImpl(
+    ::rtl::Reference<BackendImpl> const & myBackend,
+    OUString const & url,
+    Reference<XCommandEnvironment> const &xCmdEnv,
+    OUString const & scriptURL, OUString const & dialogURL, bool bRemoved,
+    OUString const & identifier)
+    : Package( myBackend, url,
+               OUString(), OUString(), // will be late-initialized
+               !scriptURL.isEmpty() ? myBackend->m_xBasicLibTypeInfo
+               : myBackend->m_xDialogLibTypeInfo, bRemoved, identifier),
+      m_scriptURL( scriptURL ),
+      m_dialogURL( dialogURL )
+{
+    // name, displayName:
+    if (!dialogURL.isEmpty()) {
+        m_dialogName = LibraryContainer::get_libname(
+            dialogURL, xCmdEnv, myBackend->getComponentContext() );
+    }
+    if (!scriptURL.isEmpty()) {
+        assert(m_name.pData);
+        m_name = LibraryContainer::get_libname(
+            scriptURL, xCmdEnv, myBackend->getComponentContext() );
+    }
+    else
+        m_name = m_dialogName;
+    m_displayName = m_name;
+}
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : t_helper( args, xComponentContext ),
+      m_xBasicLibTypeInfo( new Package::TypeInfo(
+                               "application/vnd.sun.star.basic-library",
+                               OUString() /* no file filter */,
+                               DpResId(RID_STR_BASIC_LIB)
+                               ) ),
+      m_xDialogLibTypeInfo( new Package::TypeInfo(
+                                "application/vnd.sun.star.dialog-library",
+                                OUString() /* no file filter */,
+                                DpResId(RID_STR_DIALOG_LIB)
+                                ) ),
+      m_typeInfos{ m_xBasicLibTypeInfo, m_xDialogLibTypeInfo }
+{
+    OSL_ASSERT( ! transientMode() );
+
+    if (!transientMode())
+    {
+        OUString dbFile = makeURL(getCachePath(), "backenddb.xml");
+        m_backendDb.reset(
+            new ScriptBackendDb(getComponentContext(), dbFile));
+    }
+
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.script.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+void BackendImpl::addDataToDb(OUString const & url)
+{
+    if (m_backendDb)
+        m_backendDb->addEntry(url);
+}
+
+bool BackendImpl::hasActiveEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->hasActiveEntry(url);
+    return false;
+}
+
+// XUpdatable
+
+void BackendImpl::update()
+{
+    // Nothing to do here after fixing i70283!?
+}
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return m_typeInfos;
+}
+void BackendImpl::revokeEntryFromDb(std::u16string_view url)
+{
+    if (m_backendDb)
+        m_backendDb->revokeEntry(url);
+}
+
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_,
+    bool bRemoved, OUString const & identifier,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    OUString mediaType( mediaType_ );
+    if (mediaType.isEmpty())
+    {
+        // detect media-type:
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, url, xCmdEnv ) &&
+            ucbContent.isFolder())
+        {
+            // probe for script.xlb:
+            if (create_ucb_content(
+                    nullptr, makeURL( url, "script.xlb" ),
+                    xCmdEnv, false /* no throw */ ))
+                mediaType = "application/vnd.sun.star.basic-library";
+            // probe for dialog.xlb:
+            else if (create_ucb_content(
+                         nullptr, makeURL( url, "dialog.xlb" ),
+                         xCmdEnv, false /* no throw */ ))
+                mediaType = "application/vnd.sun.star.dialog-library";
+        }
+        if (mediaType.isEmpty())
+            throw lang::IllegalArgumentException(
+                StrCannotDetectMediaType() + url,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            OUString dialogURL( makeURL( url, "dialog.xlb" ) );
+            if (! create_ucb_content(
+                    nullptr, dialogURL, xCmdEnv, false /* no throw */ )) {
+                dialogURL.clear();
+            }
+
+            if (subType.equalsIgnoreAsciiCase("vnd.sun.star.basic-library"))
+            {
+                OUString scriptURL( makeURL( url, "script.xlb"));
+                if (! create_ucb_content(
+                        nullptr, scriptURL, xCmdEnv, false /* no throw */ )) {
+                    scriptURL.clear();
+                }
+
+                return new PackageImpl(
+                    this, url, xCmdEnv, scriptURL,
+                    dialogURL, bRemoved, identifier);
+            }
+            else if (subType.equalsIgnoreAsciiCase(
+                         "vnd.sun.star.dialog-library")) {
+                return new PackageImpl(
+                    this, url, xCmdEnv,
+                    OUString() /* no script lib */,
+                    dialogURL,
+                    bRemoved, identifier);
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+
+// Package
+BackendImpl * BackendImpl::PackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException(
+            "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<PackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::PackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard & /* guard */,
+    ::rtl::Reference<AbortChannel> const & /* abortChannel */,
+    Reference<XCommandEnvironment> const & /* xCmdEnv */ )
+{
+    BackendImpl * that = getMyBackend();
+    Reference< deployment::XPackage > xThisPackage( this );
+
+    bool registered = that->hasActiveEntry(getURL());
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true /* IsPresent */,
+        beans::Ambiguous<sal_Bool>( registered, false /* IsAmbiguous */ ) );
+}
+
+void
+lcl_maybeRemoveScript(
+        bool const bExists,
+        OUString const& rName,
+        std::u16string_view rScriptURL,
+        Reference<css::script::XLibraryContainer3> const& xScriptLibs)
+{
+    if (bExists && xScriptLibs.is() && xScriptLibs->hasByName(rName))
+    {
+        const OUString sScriptUrl = xScriptLibs->getOriginalLibraryLinkURL(rName);
+        if (sScriptUrl == rScriptURL)
+            xScriptLibs->removeLibrary(rName);
+    }
+}
+
+bool
+lcl_maybeAddScript(
+        bool const bExists,
+        OUString const& rName,
+        OUString const& rScriptURL,
+        Reference<css::script::XLibraryContainer3> const& xScriptLibs)
+{
+    if (!bExists || !xScriptLibs)
+        return false;
+
+    bool bCanAdd = true;
+    if (xScriptLibs->hasByName(rName))
+    {
+        const OUString sOriginalUrl = xScriptLibs->getOriginalLibraryLinkURL(rName);
+        //We assume here that library names in extensions are unique, which may not be the case
+        //ToDo: If the script exist in another extension, then both extensions must have the
+        //same id
+        if (sOriginalUrl.match("vnd.sun.star.expand:$UNO_USER_PACKAGES_CACHE")
+            || sOriginalUrl.match("vnd.sun.star.expand:$UNO_SHARED_PACKAGES_CACHE")
+            || sOriginalUrl.match("vnd.sun.star.expand:$BUNDLED_EXTENSIONS")
+            || sOriginalUrl.match("$(INST)/share/basic/Access2Base/"))
+        {
+            xScriptLibs->removeLibrary(rName);
+            bCanAdd = true;
+        }
+        else
+        {
+            bCanAdd = false;
+        }
+    }
+
+    if (bCanAdd)
+    {
+        xScriptLibs->createLibraryLink(rName, rScriptURL, false);
+        return xScriptLibs->hasByName(rName);
+    }
+
+    return false;
+}
+
+void BackendImpl::PackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard & /* guard */,
+    bool doRegisterPackage,
+    bool startup,
+    ::rtl::Reference<AbortChannel> const & /* abortChannel */,
+    Reference<XCommandEnvironment> const & /* xCmdEnv */ )
+{
+    BackendImpl * that = getMyBackend();
+
+    Reference< deployment::XPackage > xThisPackage( this );
+    Reference<XComponentContext> const & xComponentContext = that->getComponentContext();
+
+    bool bScript = !m_scriptURL.isEmpty();
+    Reference<css::script::XLibraryContainer3> xScriptLibs;
+
+    bool bDialog = !m_dialogURL.isEmpty();
+    Reference<css::script::XLibraryContainer3> xDialogLibs;
+
+    bool bRunning = !startup && office_is_running();
+    if( bRunning )
+    {
+        if( bScript )
+        {
+            xScriptLibs.set(
+                xComponentContext->getServiceManager()->createInstanceWithContext(
+                    "com.sun.star.script.ApplicationScriptLibraryContainer",
+                    xComponentContext ), UNO_QUERY_THROW );
+        }
+
+        if( bDialog )
+        {
+            xDialogLibs.set(
+                xComponentContext->getServiceManager()->createInstanceWithContext(
+                    "com.sun.star.script.ApplicationDialogLibraryContainer",
+                    xComponentContext ), UNO_QUERY_THROW );
+        }
+    }
+    bool bRegistered = getMyBackend()->hasActiveEntry(getURL());
+    if( !doRegisterPackage )
+    {
+        //We cannot just call removeLibrary(name) because this could remove a
+        //script which was added by an extension in a different repository. For
+        //example, extension foo is contained in the bundled repository and then
+        //the user adds it to the user repository. The extension manager will
+        //then register the new script and revoke the script from the bundled
+        //extension. removeLibrary(name) would now remove the script from the
+        //user repository. That is, the script of the newly added user extension does
+        //not work anymore. Therefore we must check if the currently active
+        //script comes in fact from the currently processed extension.
+
+        if (bRegistered)
+        {
+            //we also prevent and live deployment at startup
+            if (!isRemoved() && !startup)
+            {
+                lcl_maybeRemoveScript(bScript, m_name, m_scriptURL, xScriptLibs);
+                lcl_maybeRemoveScript(bDialog, m_dialogName, m_dialogURL, xDialogLibs);
+            }
+            getMyBackend()->revokeEntryFromDb(getURL());
+            return;
+        }
+    }
+    if (bRegistered)
+        return;     // Already registered
+
+    // Update LibraryContainer
+    bool bScriptSuccess = false;
+    bool bDialogSuccess = false;
+    if (!startup)
+    {
+        //If there is a bundled extension, and the user installs the same extension
+        //then the script from the bundled extension must be removed. If this does not work
+        //then live deployment does not work for scripts.
+        bScriptSuccess = lcl_maybeAddScript(bScript, m_name, m_scriptURL, xScriptLibs);
+        bDialogSuccess = lcl_maybeAddScript(bDialog, m_dialogName, m_dialogURL, xDialogLibs);
+    }
+    bool bSuccess = bScript || bDialog;     // Something must have happened
+    if( bRunning )
+        if( (bScript && !bScriptSuccess) || (bDialog && !bDialogSuccess) )
+            bSuccess = false;
+
+    if (bSuccess)
+        getMyBackend()->addDataToDb(getURL());
+}
+
+} // anon namespace
+
+} // namespace dp_registry::backend::script
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_script_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::script::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/script/dp_scriptbackenddb.cxx b/desktop/source/deployment/registry/script/dp_scriptbackenddb.cxx
new file mode 100644
index 000000000..476f43953
--- /dev/null
+++ b/desktop/source/deployment/registry/script/dp_scriptbackenddb.cxx
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include "dp_scriptbackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/script-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"script";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"script-backend-db";
+constexpr OUStringLiteral KEY_ELEMENT_NAME = u"script";
+
+namespace dp_registry::backend::script {
+
+ScriptBackendDb::ScriptBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):RegisteredDb(xContext, url)
+{
+
+}
+
+OUString ScriptBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString ScriptBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString ScriptBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString ScriptBackendDb::getKeyElementName()
+{
+    return KEY_ELEMENT_NAME;
+}
+
+
+} // namespace dp_registry::backend::script
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/script/dp_scriptbackenddb.hxx b/desktop/source/deployment/registry/script/dp_scriptbackenddb.hxx
new file mode 100644
index 000000000..21d4b1f6b
--- /dev/null
+++ b/desktop/source/deployment/registry/script/dp_scriptbackenddb.hxx
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <dp_backenddb.hxx>
+#include <optional>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+namespace dp_registry::backend::script {
+
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+ */
+class ScriptBackendDb: public dp_registry::backend::RegisteredDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+
+    virtual OUString getNSPrefix() override;
+
+    virtual OUString getRootElementName() override;
+
+    virtual OUString getKeyElementName() override;
+
+
+public:
+
+    ScriptBackendDb( css::uno::Reference<css::uno::XComponentContext> const &  xContext,
+                        OUString const & url);
+};
+
+
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/sfwk/dp_parceldesc.cxx b/desktop/source/deployment/registry/sfwk/dp_parceldesc.cxx
new file mode 100644
index 000000000..530924a07
--- /dev/null
+++ b/desktop/source/deployment/registry/sfwk/dp_parceldesc.cxx
@@ -0,0 +1,103 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <dp_misc.h>
+#include "dp_parceldesc.hxx"
+
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+
+namespace dp_registry::backend::sfwk
+{
+
+
+// XDocumentHandler
+void SAL_CALL
+ParcelDescDocHandler::startDocument()
+{
+    m_bIsParsed = false;
+}
+
+void SAL_CALL
+ParcelDescDocHandler::endDocument()
+{
+    m_bIsParsed = true;
+}
+
+void SAL_CALL
+ParcelDescDocHandler::characters( const OUString & )
+{
+}
+
+void SAL_CALL
+ParcelDescDocHandler::ignorableWhitespace( const OUString & )
+{
+}
+
+void SAL_CALL
+ParcelDescDocHandler::processingInstruction(
+    const OUString &, const OUString & )
+{
+}
+
+void SAL_CALL
+ParcelDescDocHandler::setDocumentLocator(
+    const Reference< xml::sax::XLocator >& )
+{
+}
+
+void SAL_CALL
+ParcelDescDocHandler::startElement( const OUString& aName,
+    const Reference< xml::sax::XAttributeList > & xAttribs )
+{
+
+    dp_misc::TRACE("ParcelDescDocHandler::startElement() for " +
+        aName + "\n");
+    if ( !skipIndex )
+    {
+        if ( aName == "parcel" )
+        {
+            m_sLang = xAttribs->getValueByName( "language" );
+        }
+        ++skipIndex;
+    }
+    else
+    {
+        dp_misc::TRACE("ParcelDescDocHandler::startElement() skipping for "
+            + aName + "\n");
+    }
+
+}
+
+void SAL_CALL ParcelDescDocHandler::endElement( const OUString & aName )
+{
+    if ( skipIndex )
+    {
+        --skipIndex;
+        dp_misc::TRACE("ParcelDescDocHandler::endElement() skipping for "
+            + aName + "\n");
+    }
+}
+
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/sfwk/dp_parceldesc.hxx b/desktop/source/deployment/registry/sfwk/dp_parceldesc.hxx
new file mode 100644
index 000000000..6b5bde8bd
--- /dev/null
+++ b/desktop/source/deployment/registry/sfwk/dp_parceldesc.hxx
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <cppuhelper/implbase.hxx>
+
+#include <com/sun/star/xml/sax/XAttributeList.hpp>
+#include <com/sun/star/xml/sax/XDocumentHandler.hpp>
+
+namespace dp_registry::backend::sfwk
+{
+
+class ParcelDescDocHandler : public ::cppu::WeakImplHelper< css::xml::sax::XDocumentHandler >
+{
+private:
+    bool m_bIsParsed;
+    OUString m_sLang;
+    sal_Int32 skipIndex;
+public:
+    ParcelDescDocHandler():m_bIsParsed( false ), skipIndex( 0 ){}
+    const OUString& getParcelLanguage() const { return m_sLang; }
+    bool isParsed() const { return m_bIsParsed; }
+    // XDocumentHandler
+    virtual void SAL_CALL startDocument() override;
+
+    virtual void SAL_CALL endDocument() override;
+
+    virtual void SAL_CALL startElement( const OUString& aName,
+        const css::uno::Reference< css::xml::sax::XAttributeList > & xAttribs ) override;
+
+    virtual void SAL_CALL endElement( const OUString & aName ) override;
+
+    virtual void SAL_CALL characters( const OUString & aChars ) override;
+
+    virtual void SAL_CALL ignorableWhitespace( const OUString & aWhitespaces ) override;
+
+    virtual void SAL_CALL processingInstruction(
+        const OUString & aTarget, const OUString & aData ) override;
+
+    virtual void SAL_CALL setDocumentLocator(
+        const css::uno::Reference< css::xml::sax::XLocator >& xLocator ) override;
+};
+}
+
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/sfwk/dp_sfwk.cxx b/desktop/source/deployment/registry/sfwk/dp_sfwk.cxx
new file mode 100644
index 000000000..b617d7fa4
--- /dev/null
+++ b/desktop/source/deployment/registry/sfwk/dp_sfwk.cxx
@@ -0,0 +1,378 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <strings.hrc>
+#include <dp_backend.h>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include "dp_parceldesc.hxx"
+#include <rtl/uri.hxx>
+#include <ucbhelper/content.hxx>
+#include <svl/inettype.hxx>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/script/provider/theMasterScriptProviderFactory.hpp>
+#include <com/sun/star/xml/sax/Parser.hpp>
+#include <cppuhelper/supportsservice.hxx>
+#include <utility>
+
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+using namespace ::com::sun::star::script;
+
+
+namespace dp_registry::backend::sfwk
+{
+
+namespace {
+
+class BackendImpl : public ::dp_registry::backend::PackageRegistryBackend
+{
+    class PackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        Reference< container::XNameContainer > m_xNameCntrPkgHandler;
+        OUString m_descr;
+
+        void initPackageHandler();
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    public:
+        PackageImpl(
+            ::rtl::Reference<BackendImpl> const & myBackend,
+            OUString const & url, OUString libType, bool bRemoved,
+            OUString const & identifier);
+        // XPackage
+        virtual OUString SAL_CALL getDescription() override;
+        virtual OUString SAL_CALL getLicenseText() override;
+    };
+    friend class PackageImpl;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    const Reference<deployment::XPackageTypeInfo> m_xTypeInfo;
+
+
+public:
+    BackendImpl(
+        Sequence<Any> const & args,
+        Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+};
+
+}
+
+BackendImpl * BackendImpl::PackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException("Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<PackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+OUString BackendImpl::PackageImpl::getDescription()
+{
+    if (m_descr.isEmpty())
+        return Package::getDescription();
+    else
+        return m_descr;
+}
+
+OUString BackendImpl::PackageImpl::getLicenseText()
+{
+    return Package::getDescription();
+}
+
+BackendImpl::PackageImpl::PackageImpl(
+    ::rtl::Reference<BackendImpl> const & myBackend,
+    OUString const & url, OUString  libType, bool bRemoved,
+    OUString const & identifier)
+    : Package( myBackend, url, OUString(), OUString(),
+               myBackend->m_xTypeInfo, bRemoved, identifier),
+      m_descr(std::move(libType))
+{
+    initPackageHandler();
+
+    sal_Int32 segmEnd = url.getLength();
+    if ( url.endsWith("/") )
+        --segmEnd;
+    sal_Int32 segmStart = url.lastIndexOf( '/', segmEnd ) + 1;
+    if (segmStart < 0)
+        segmStart = 0;
+    // name and display name default the same:
+    m_displayName = ::rtl::Uri::decode(
+        url.copy( segmStart, segmEnd - segmStart ),
+        rtl_UriDecodeWithCharset, RTL_TEXTENCODING_UTF8 );
+    m_name = m_displayName;
+
+    dp_misc::TRACE("PackageImpl displayName is " + m_displayName);
+}
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : PackageRegistryBackend( args, xComponentContext ),
+      m_xTypeInfo( new Package::TypeInfo(
+                       "application/vnd.sun.star.framework-script",
+                       OUString() /* no file filter */,
+                       "Scripting Framework Script Library"
+                       ) )
+{
+}
+
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.sfwk.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return Sequence< Reference<deployment::XPackageTypeInfo> >(&m_xTypeInfo, 1);
+}
+
+void BackendImpl::packageRemoved(OUString const & /*url*/, OUString const & /*mediaType*/)
+{
+}
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_, bool bRemoved,
+    OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    OUString mediaType( mediaType_ );
+    if (mediaType.isEmpty())
+    {
+        // detect media-type:
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, url, xCmdEnv ) &&
+            ucbContent.isFolder())
+        {
+            // probe for parcel-descriptor.xml:
+            if (create_ucb_content(
+                    nullptr, makeURL( url, "parcel-descriptor.xml" ),
+                    xCmdEnv, false /* no throw */ ))
+            {
+                mediaType = "application/vnd.sun.star.framework-script";
+            }
+        }
+        if (mediaType.isEmpty())
+            throw lang::IllegalArgumentException(
+                StrCannotDetectMediaType() + url,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            if (subType.equalsIgnoreAsciiCase("vnd.sun.star.framework-script"))
+            {
+                OUString lang = "Script";
+                OUString sParcelDescURL = makeURL(
+                    url, "parcel-descriptor.xml" );
+
+                ::ucbhelper::Content ucb_content;
+
+                if (create_ucb_content( &ucb_content, sParcelDescURL,
+                        xCmdEnv, false /* no throw */ ))
+                {
+                    rtl::Reference<ParcelDescDocHandler> pHandler =
+                        new ParcelDescDocHandler();
+
+                    Reference<XComponentContext>
+                        xContext( getComponentContext() );
+
+                    Reference< xml::sax::XParser > xParser = xml::sax::Parser::create(xContext);
+
+                    xParser->setDocumentHandler( pHandler );
+                    xml::sax::InputSource source;
+                    source.aInputStream = ucb_content.openStream();
+                    source.sSystemId = ucb_content.getURL();
+                    xParser->parseStream( source );
+
+                    if ( pHandler->isParsed() )
+                    {
+                        lang = pHandler->getParcelLanguage();
+                    }
+                }
+
+                OUString sfwkLibType = DpResId( RID_STR_SFWK_LIB );
+                // replace %MACRONAME placeholder with language name
+                OUString MACRONAME( "%MACROLANG" );
+                sal_Int32 startOfReplace = sfwkLibType.indexOf( MACRONAME );
+                sal_Int32 charsToReplace = MACRONAME.getLength();
+                sfwkLibType = sfwkLibType.replaceAt( startOfReplace, charsToReplace, lang );
+                dp_misc::TRACE("******************************\n");
+                dp_misc::TRACE(" BackEnd detected lang = " + lang + "\n");
+                dp_misc::TRACE(" for url " + sParcelDescURL + "\n");
+                dp_misc::TRACE("******************************\n");
+                return new PackageImpl( this, url, sfwkLibType, bRemoved, identifier);
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+
+void BackendImpl::PackageImpl:: initPackageHandler()
+{
+    if (m_xNameCntrPkgHandler.is())
+        return;
+
+    BackendImpl * that = getMyBackend();
+    Any aContext;
+
+    if ( that->m_eContext == Context::User )
+    {
+        aContext  <<= OUString("user");
+    }
+    else if ( that->m_eContext == Context::Shared )
+    {
+        aContext  <<= OUString("share");
+    }
+    else if ( that->m_eContext == Context::Bundled )
+    {
+        aContext  <<= OUString("bundled");
+    }
+    else
+    {
+        OSL_ASSERT( false );
+        // NOT supported at the moment // TODO
+    }
+
+    Reference< provider::XScriptProviderFactory > xFac =
+        provider::theMasterScriptProviderFactory::get( that->getComponentContext() );
+
+    Reference< container::XNameContainer > xName( xFac->createScriptProvider( aContext ), UNO_QUERY );
+    if ( xName.is() )
+    {
+        m_xNameCntrPkgHandler.set( xName );
+    }
+    // TODO what happens if above fails??
+}
+
+// Package
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::PackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true /* IsPresent */,
+        beans::Ambiguous<sal_Bool>(
+            m_xNameCntrPkgHandler.is() && m_xNameCntrPkgHandler->hasByName(
+                m_url ),
+            false /* IsAmbiguous */ ) );
+}
+
+
+void BackendImpl::PackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool /* startup */,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    if ( !m_xNameCntrPkgHandler.is() )
+    {
+        dp_misc::TRACE("no package handler!!!!\n");
+        throw RuntimeException( "No package Handler " );
+    }
+
+    if (doRegisterPackage)
+    {
+        // will throw if it fails
+        m_xNameCntrPkgHandler->insertByName( m_url, Any( Reference< XPackage >(this) ) );
+
+    }
+    else // revokePackage()
+    {
+        m_xNameCntrPkgHandler->removeByName( m_url );
+    }
+}
+
+} // namespace dp_registry::backend::sfwk
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_sfwk_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::sfwk::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/inc/helpids.h b/desktop/source/inc/helpids.h
new file mode 100644
index 000000000..023ffdea7
--- /dev/null
+++ b/desktop/source/inc/helpids.h
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/string.hxx>
+
+inline constexpr OStringLiteral HID_EXTENSION_MANAGER_LISTBOX_ENABLE = "DESKTOP_HID_EXTENSION_MANAGER_LISTBOX_ENABLE";
+inline constexpr OStringLiteral HID_EXTENSION_MANAGER_LISTBOX_DISABLE = "DESKTOP_HID_EXTENSION_MANAGER_LISTBOX_DISABLE";
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/lib/init.cxx b/desktop/source/lib/init.cxx
new file mode 100644
index 000000000..ab55ce959
--- /dev/null
+++ b/desktop/source/lib/init.cxx
@@ -0,0 +1,6997 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <config_features.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#ifdef IOS
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <unicode/udata.h>
+#include <unicode/ucnv.h>
+#include <premac.h>
+#import <Foundation/Foundation.h>
+#import <CoreGraphics/CoreGraphics.h>
+#include <postmac.h>
+#endif
+
+#ifdef ANDROID
+#include <osl/detail/android-bootstrap.h>
+#endif
+
+#include <algorithm>
+#include <memory>
+#include <iostream>
+#include <string_view>
+
+#include <boost/property_tree/json_parser.hpp>
+#include <boost/algorithm/string.hpp>
+
+#include <LibreOfficeKit/LibreOfficeKit.h>
+#include <LibreOfficeKit/LibreOfficeKitEnums.h>
+
+#include <sal/log.hxx>
+#include <utility>
+#include <vcl/errinf.hxx>
+#include <vcl/lok.hxx>
+#include <o3tl/any.hxx>
+#include <o3tl/unit_conversion.hxx>
+#include <o3tl/string_view.hxx>
+#include <osl/file.hxx>
+#include <osl/process.h>
+#include <osl/thread.h>
+#include <rtl/bootstrap.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/uri.hxx>
+#include <cppuhelper/bootstrap.hxx>
+#include <comphelper/base64.hxx>
+#include <comphelper/dispatchcommand.hxx>
+#include <comphelper/lok.hxx>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/string.hxx>
+#include <comphelper/profilezone.hxx>
+#include <comphelper/propertysequence.hxx>
+#include <comphelper/propertyvalue.hxx>
+#include <comphelper/scopeguard.hxx>
+#include <comphelper/threadpool.hxx>
+#include <comphelper/sequenceashashmap.hxx>
+
+#include <com/sun/star/document/MacroExecMode.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/frame/DispatchResultEvent.hpp>
+#include <com/sun/star/frame/DispatchResultState.hpp>
+#include <com/sun/star/frame/XDispatchProvider.hpp>
+#include <com/sun/star/frame/XDispatchResultListener.hpp>
+#include <com/sun/star/frame/XSynchronousDispatch.hpp>
+#include <com/sun/star/frame/XStorable.hpp>
+#include <com/sun/star/lang/Locale.hpp>
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/style/XStyleFamiliesSupplier.hpp>
+#include <com/sun/star/util/URLTransformer.hpp>
+#include <com/sun/star/datatransfer/clipboard/XClipboard.hpp>
+#include <com/sun/star/datatransfer/UnsupportedFlavorException.hpp>
+#include <com/sun/star/datatransfer/XTransferable2.hpp>
+#include <com/sun/star/text/TextContentAnchorType.hpp>
+#include <com/sun/star/document/XRedlinesSupplier.hpp>
+#include <com/sun/star/ui/GlobalAcceleratorConfiguration.hpp>
+
+#include <com/sun/star/xml/crypto/SEInitializer.hpp>
+#include <com/sun/star/xml/crypto/XSEInitializer.hpp>
+#include <com/sun/star/xml/crypto/XSecurityEnvironment.hpp>
+#include <com/sun/star/xml/crypto/XCertificateCreator.hpp>
+#include <com/sun/star/security/XCertificate.hpp>
+
+#include <com/sun/star/linguistic2/LinguServiceManager.hpp>
+#include <com/sun/star/linguistic2/XSpellChecker.hpp>
+#include <com/sun/star/i18n/LocaleCalendar2.hpp>
+#include <com/sun/star/i18n/ScriptType.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+
+#include <editeng/flstitem.hxx>
+#ifdef IOS
+#include <sfx2/app.hxx>
+#endif
+#include <sfx2/objsh.hxx>
+#include <sfx2/docfilt.hxx>
+#include <sfx2/docfile.hxx>
+#include <sfx2/viewsh.hxx>
+#include <sfx2/viewfrm.hxx>
+#include <sfx2/msgpool.hxx>
+#include <sfx2/dispatch.hxx>
+#include <sfx2/lokcomponenthelpers.hxx>
+#include <sfx2/DocumentSigner.hxx>
+#include <sfx2/sidebar/SidebarDockingWindow.hxx>
+#include <sfx2/sidebar/SidebarController.hxx>
+#include <svl/numformat.hxx>
+#include <svx/dialmgr.hxx>
+#include <svx/strings.hrc>
+#include <svx/svdview.hxx>
+#include <svx/svxids.hrc>
+#include <svx/ucsubset.hxx>
+#include <vcl/vclevent.hxx>
+#include <vcl/GestureEvent.hxx>
+#include <vcl/svapp.hxx>
+#include <unotools/resmgr.hxx>
+#include <tools/fract.hxx>
+#include <tools/json_writer.hxx>
+#include <svtools/ctrltool.hxx>
+#include <svtools/langtab.hxx>
+#include <vcl/fontcharmap.hxx>
+#ifdef IOS
+#include <vcl/sysdata.hxx>
+#endif
+#include <vcl/virdev.hxx>
+#include <vcl/ImageTree.hxx>
+#include <vcl/ITiledRenderable.hxx>
+#include <vcl/dialoghelper.hxx>
+#include <unicode/uchar.h>
+#include <unotools/securityoptions.hxx>
+#include <unotools/confignode.hxx>
+#include <unotools/syslocaleoptions.hxx>
+#include <unotools/mediadescriptor.hxx>
+#include <unotools/pathoptions.hxx>
+#include <unotools/tempfile.hxx>
+#include <unotools/streamwrap.hxx>
+#include <osl/module.hxx>
+#include <comphelper/sequence.hxx>
+#include <sfx2/sfxbasemodel.hxx>
+#include <svl/undo.hxx>
+#include <unotools/datetime.hxx>
+#include <i18nlangtag/mslangid.hxx>
+#include <i18nlangtag/languagetag.hxx>
+#include <vcl/abstdlg.hxx>
+#include <tools/diagnose_ex.h>
+#include <vcl/uitest/uiobject.hxx>
+#include <vcl/jsdialog/executor.hxx>
+
+// Needed for getUndoManager()
+#include <com/sun/star/document/XUndoManager.hpp>
+#include <com/sun/star/document/XUndoManagerSupplier.hpp>
+#include <editeng/sizeitem.hxx>
+#include <svx/rulritem.hxx>
+#include <svx/pageitem.hxx>
+
+#include <app.hxx>
+
+#include "../app/cmdlineargs.hxx"
+// We also need to hackily be able to start the main libreoffice thread:
+#include "../app/sofficemain.h"
+#include "../app/officeipcthread.hxx"
+#include <lib/init.hxx>
+
+#include "lokinteractionhandler.hxx"
+#include "lokclipboard.hxx"
+#include <officecfg/Office/Common.hxx>
+#include <officecfg/Office/Impress.hxx>
+#include <unotools/optionsdlg.hxx>
+#include <svl/ctloptions.hxx>
+#include <svtools/accessibilityoptions.hxx>
+#include <svtools/colorcfg.hxx>
+#include <svtools/miscopt.hxx>
+#include <svtools/slidesorterbaropt.hxx>
+#include <unotools/cmdoptions.hxx>
+#include <unotools/compatibility.hxx>
+#include <unotools/fltrcfg.hxx>
+#include <unotools/lingucfg.hxx>
+#include <unotools/moduleoptions.hxx>
+#include <unotools/searchopt.hxx>
+#include <unotools/useroptions.hxx>
+#include <unotools/viewoptions.hxx>
+#include <vcl/settings.hxx>
+
+using namespace css;
+using namespace vcl;
+using namespace desktop;
+using namespace utl;
+
+static LibLibreOffice_Impl *gImpl = nullptr;
+static bool lok_preinit_2_called = false;
+static std::weak_ptr< LibreOfficeKitClass > gOfficeClass;
+static std::weak_ptr< LibreOfficeKitDocumentClass > gDocumentClass;
+
+static void SetLastExceptionMsg(const OUString& s = OUString())
+{
+    SAL_WARN_IF(!s.isEmpty(), "lok", "lok exception '" + s + "'");
+    if (gImpl)
+        gImpl->maLastExceptionMsg = s;
+}
+
+namespace {
+
+struct ExtensionMap
+{
+    const char *extn;
+    const char *filterName;
+};
+
+class TraceEventDumper : public AutoTimer
+{
+    static const int dumpTimeoutMS = 5000;
+
+public:
+    TraceEventDumper() : AutoTimer( "Trace Event dumper" )
+    {
+        SetTimeout(dumpTimeoutMS);
+        Start();
+    }
+
+    virtual void Invoke() override
+    {
+        flushRecordings();
+    }
+
+    static void flushRecordings()
+    {
+        const css::uno::Sequence<OUString> aEvents =
+            comphelper::TraceEvent::getRecordingAndClear();
+        OStringBuffer aOutput;
+        for (const auto &s : aEvents)
+        {
+            aOutput.append(OUStringToOString(s, RTL_TEXTENCODING_UTF8));
+            aOutput.append("\n");
+        }
+        if (aOutput.getLength() > 0)
+        {
+            OString aChunk = aOutput.makeStringAndClear();
+            if (gImpl && gImpl->mpCallback)
+                gImpl->mpCallback(LOK_CALLBACK_PROFILE_FRAME, aChunk.getStr(), gImpl->mpCallbackData);
+        }
+    }
+};
+
+} // unnamed namespace
+
+static TraceEventDumper *traceEventDumper = nullptr;
+
+const ExtensionMap aWriterExtensionMap[] =
+{
+    { "doc",   "MS Word 97" },
+    { "docm",  "MS Word 2007 XML VBA" },
+    { "docx",  "MS Word 2007 XML" },
+    { "fodt",  "OpenDocument Text Flat XML" },
+    { "html",  "HTML (StarWriter)" },
+    { "odt",   "writer8" },
+    { "ott",   "writer8_template" },
+    { "pdf",   "writer_pdf_Export" },
+    { "epub",  "EPUB" },
+    { "rtf",   "Rich Text Format" },
+    { "txt",   "Text" },
+    { "xhtml", "XHTML Writer File" },
+    { "png",   "writer_png_Export" },
+    { "xml",   "writer_indexing_export" },
+    { nullptr, nullptr }
+};
+
+const ExtensionMap aCalcExtensionMap[] =
+{
+    { "csv",   "Text - txt - csv (StarCalc)" },
+    { "fods",  "OpenDocument Spreadsheet Flat XML" },
+    { "html",  "HTML (StarCalc)" },
+    { "ods",   "calc8" },
+    { "ots",   "calc8_template" },
+    { "pdf",   "calc_pdf_Export" },
+    { "xhtml", "XHTML Calc File" },
+    { "xls",   "MS Excel 97" },
+    { "xlsm",  "Calc MS Excel 2007 VBA XML" },
+    { "xlsx",  "Calc MS Excel 2007 XML" },
+    { "png",   "calc_png_Export" },
+    { nullptr, nullptr }
+};
+
+const ExtensionMap aImpressExtensionMap[] =
+{
+    { "fodp",  "OpenDocument Presentation Flat XML" },
+    { "html",  "impress_html_Export" },
+    { "odg",   "impress8_draw" },
+    { "odp",   "impress8" },
+    { "otp",   "impress8_template" },
+    { "pdf",   "impress_pdf_Export" },
+    { "potm",  "Impress MS PowerPoint 2007 XML Template" },
+    { "pot",   "MS PowerPoint 97 Vorlage" },
+    { "pptm",  "Impress MS PowerPoint 2007 XML VBA" },
+    { "pptx",  "Impress MS PowerPoint 2007 XML" },
+    { "pps",   "MS PowerPoint 97 Autoplay" },
+    { "ppt",   "MS PowerPoint 97" },
+    { "svg",   "impress_svg_Export" },
+    { "xhtml", "XHTML Impress File" },
+    { "png",   "impress_png_Export"},
+    { nullptr, nullptr }
+};
+
+const ExtensionMap aDrawExtensionMap[] =
+{
+    { "fodg",  "draw_ODG_FlatXML" },
+    { "html",  "draw_html_Export" },
+    { "odg",   "draw8" },
+    { "pdf",   "draw_pdf_Export" },
+    { "svg",   "draw_svg_Export" },
+    { "xhtml", "XHTML Draw File" },
+    { "png",   "draw_png_Export"},
+    { nullptr, nullptr }
+};
+
+static OUString getUString(const char* pString)
+{
+    if (pString == nullptr)
+        return OUString();
+
+    OString sString(pString, strlen(pString));
+    return OStringToOUString(sString, RTL_TEXTENCODING_UTF8);
+}
+
+// Tolerate embedded \0s etc.
+static char *convertOString(const OString &rStr)
+{
+    char* pMemory = static_cast<char*>(malloc(rStr.getLength() + 1));
+    assert(pMemory); // don't tolerate failed allocations.
+    memcpy(pMemory, rStr.getStr(), rStr.getLength() + 1);
+    return pMemory;
+}
+
+static char *convertOUString(std::u16string_view aStr)
+{
+    return convertOString(OUStringToOString(aStr, RTL_TEXTENCODING_UTF8));
+}
+
+/// Try to convert a relative URL to an absolute one, unless it already looks like a URL.
+static OUString getAbsoluteURL(const char* pURL)
+{
+    OUString aURL(getUString(pURL));
+    if (aURL.isEmpty())
+        return aURL;
+
+    // convert relative paths to absolute ones
+    OUString aWorkingDir;
+    osl_getProcessWorkingDir(&aWorkingDir.pData);
+    if (!aWorkingDir.endsWith("/"))
+        aWorkingDir += "/";
+
+    try
+    {
+        return rtl::Uri::convertRelToAbs(aWorkingDir, aURL);
+    }
+    catch (const rtl::MalformedUriException &)
+    {
+    }
+
+    return OUString();
+}
+
+std::vector<beans::PropertyValue> desktop::jsonToPropertyValuesVector(const char* pJSON)
+{
+    std::vector<beans::PropertyValue> aArguments;
+    if (pJSON && pJSON[0] != '\0')
+    {
+        aArguments = comphelper::JsonToPropertyValues(pJSON);
+    }
+    return aArguments;
+}
+
+static void unoAnyToJson(tools::JsonWriter& rJson, const char * pNodeName, const uno::Any& anyItem)
+{
+    auto aNode = rJson.startNode(pNodeName);
+    OUString aType = anyItem.getValueTypeName();
+    rJson.put("type", aType.toUtf8().getStr());
+
+    if (aType == "string")
+        rJson.put("value", anyItem.get<OUString>().toUtf8().getStr());
+    else if (aType == "unsigned long")
+        rJson.put("value", OString::number(anyItem.get<sal_uInt32>()).getStr());
+    else if (aType == "long")
+        rJson.put("value", OString::number(anyItem.get<sal_Int32>()).getStr());
+    else if (aType == "[]any")
+    {
+        uno::Sequence<uno::Any> aSeq;
+        if (anyItem >>= aSeq)
+        {
+            auto valueNode = rJson.startNode("value");
+
+            for (auto i = 0; i < aSeq.getLength(); ++i)
+            {
+                unoAnyToJson(rJson, OString::number(i).getStr(), aSeq[i]);
+            }
+        }
+    }
+}
+
+static int lcl_getViewId(const std::string& payload);
+
+namespace desktop {
+
+RectangleAndPart RectangleAndPart::Create(const std::string& rPayload)
+{
+    RectangleAndPart aRet;
+    if (rPayload.compare(0, 5, "EMPTY") == 0) // payload starts with "EMPTY"
+    {
+        aRet.m_aRectangle = tools::Rectangle(0, 0, SfxLokHelper::MaxTwips, SfxLokHelper::MaxTwips);
+        if (comphelper::LibreOfficeKit::isPartInInvalidation())
+            aRet.m_nPart = std::stol(rPayload.substr(6));
+
+        return aRet;
+    }
+
+    // Read '<left>, <top>, <width>, <height>[, <part>]'. C++ streams are simpler but slower.
+    const char* pos = rPayload.c_str();
+    const char* end = rPayload.c_str() + rPayload.size();
+    tools::Long nLeft = rtl_str_toInt64_WithLength(pos, 10, end - pos);
+    while( *pos != ',' )
+        ++pos;
+    ++pos;
+    assert(pos < end);
+    tools::Long nTop = rtl_str_toInt64_WithLength(pos, 10, end - pos);
+    while( *pos != ',' )
+        ++pos;
+    ++pos;
+    assert(pos < end);
+    tools::Long nWidth = rtl_str_toInt64_WithLength(pos, 10, end - pos);
+    while( *pos != ',' )
+        ++pos;
+    ++pos;
+    assert(pos < end);
+    tools::Long nHeight = rtl_str_toInt64_WithLength(pos, 10, end - pos);
+    tools::Long nPart = INT_MIN;
+    if (comphelper::LibreOfficeKit::isPartInInvalidation())
+    {
+        while( *pos != ',' )
+            ++pos;
+        ++pos;
+        assert(pos < end);
+        nPart = rtl_str_toInt64_WithLength(pos, 10, end - pos);
+    }
+
+    aRet.m_aRectangle = SanitizedRectangle(nLeft, nTop, nWidth, nHeight);
+    aRet.m_nPart = nPart;
+    return aRet;
+}
+
+tools::Rectangle RectangleAndPart::SanitizedRectangle(tools::Long nLeft, tools::Long nTop, tools::Long nWidth, tools::Long nHeight)
+{
+    if (nWidth <= 0 || nHeight <= 0)
+        return tools::Rectangle();
+
+    // The top-left corner starts at (0, 0).
+    // Anything negative is invalid.
+    if (nLeft < 0)
+    {
+        nWidth += nLeft;
+        nLeft = 0;
+    }
+
+    if (nTop < 0)
+    {
+        nHeight += nTop;
+        nTop = 0;
+    }
+
+    if (nWidth > 0 && nHeight > 0)
+        return tools::Rectangle(nLeft, nTop, nLeft + nWidth, nTop + nHeight);
+    // Else set empty rect.
+    return tools::Rectangle();
+}
+
+tools::Rectangle RectangleAndPart::SanitizedRectangle(const tools::Rectangle& rect)
+{
+    return SanitizedRectangle(rect.Left(), rect.Top(), rect.getWidth(), rect.getHeight());
+}
+
+const std::string& CallbackFlushHandler::CallbackData::getPayload() const
+{
+    if(PayloadString.empty())
+    {
+        // Do to-string conversion on demand, as many calls will get dropped without
+        // needing the string.
+        if(PayloadObject.which() == 1)
+            PayloadString = getRectangleAndPart().toString();
+    }
+    return PayloadString;
+}
+
+void CallbackFlushHandler::CallbackData::updateRectangleAndPart(const RectangleAndPart& rRectAndPart)
+{
+    PayloadObject = rRectAndPart;
+    PayloadString.clear(); // will be set on demand if needed
+}
+
+const RectangleAndPart& CallbackFlushHandler::CallbackData::getRectangleAndPart() const
+{
+    // TODO: In case of unittests, they do not pass invalidations in binary but as text messages.
+    // LO core should preferably always pass binary for performance.
+    if(PayloadObject.which() != 1)
+        PayloadObject = RectangleAndPart::Create(PayloadString);
+    return boost::get<RectangleAndPart>(PayloadObject);
+}
+
+boost::property_tree::ptree& CallbackFlushHandler::CallbackData::setJson(const std::string& payload)
+{
+    boost::property_tree::ptree aTree;
+    std::stringstream aStream(payload);
+    boost::property_tree::read_json(aStream, aTree);
+
+    // Let boost normalize the payload so it always matches the cache.
+    setJson(aTree);
+
+    // Return reference to the cached object.
+    return boost::get<boost::property_tree::ptree>(PayloadObject);
+}
+
+void CallbackFlushHandler::CallbackData::setJson(const boost::property_tree::ptree& rTree)
+{
+    std::stringstream aJSONStream;
+    constexpr bool bPretty = false; // Don't waste time and bloat logs.
+    boost::property_tree::write_json(aJSONStream, rTree, bPretty);
+    PayloadString = boost::trim_copy(aJSONStream.str());
+
+    PayloadObject = rTree;
+}
+
+const boost::property_tree::ptree& CallbackFlushHandler::CallbackData::getJson() const
+{
+    assert(PayloadObject.which() == 2);
+    return boost::get<boost::property_tree::ptree>(PayloadObject);
+}
+
+int CallbackFlushHandler::CallbackData::getViewId() const
+{
+    if (isCached())
+    {
+        assert(PayloadObject.which() == 3);
+        return boost::get<int>(PayloadObject);
+    }
+    return lcl_getViewId(getPayload());
+}
+
+bool CallbackFlushHandler::CallbackData::validate() const
+{
+    switch (PayloadObject.which())
+    {
+        // Not cached.
+        case 0:
+            return true;
+
+        // RectangleAndPart.
+        case 1:
+            return getRectangleAndPart().toString().getStr() == getPayload();
+
+        // Json.
+        case 2:
+        {
+            std::stringstream aJSONStream;
+            boost::property_tree::write_json(aJSONStream, getJson(), false);
+            const std::string aExpected = boost::trim_copy(aJSONStream.str());
+            return aExpected == getPayload();
+        }
+
+        // View id.
+        case 3:
+            return getViewId() == lcl_getViewId( getPayload());
+
+        default:
+            assert(!"Unknown variant type; please add an entry to validate.");
+    }
+
+    return false;
+}
+
+} // namespace desktop
+
+static bool lcl_isViewCallbackType(const int type)
+{
+    switch (type)
+    {
+        case LOK_CALLBACK_CELL_VIEW_CURSOR:
+        case LOK_CALLBACK_GRAPHIC_VIEW_SELECTION:
+        case LOK_CALLBACK_INVALIDATE_VIEW_CURSOR:
+        case LOK_CALLBACK_TEXT_VIEW_SELECTION:
+        case LOK_CALLBACK_VIEW_CURSOR_VISIBLE:
+            return true;
+
+        default:
+            return false;
+    }
+}
+
+static bool isUpdatedType(int type)
+{
+    switch (type)
+    {
+        case LOK_CALLBACK_TEXT_SELECTION:
+        case LOK_CALLBACK_TEXT_SELECTION_START:
+        case LOK_CALLBACK_TEXT_SELECTION_END:
+            return true;
+        default:
+            return false;
+    }
+}
+
+static bool isUpdatedTypePerViewId(int type)
+{
+    switch (type)
+    {
+        case LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR:
+        case LOK_CALLBACK_INVALIDATE_VIEW_CURSOR:
+        case LOK_CALLBACK_TEXT_VIEW_SELECTION:
+            return true;
+        default:
+            return false;
+    }
+}
+
+static int lcl_getViewId(const std::string& payload)
+{
+    // this is a cheap way how to get the viewId from a JSON message; proper
+    // parsing is terribly expensive, and we just need the viewId here
+    size_t viewIdPos = payload.find("viewId");
+    if (viewIdPos == std::string::npos)
+        return 0;
+
+    size_t numberPos = payload.find(":", viewIdPos + 6);
+    if (numberPos == std::string::npos)
+        return 0;
+
+    for (++numberPos; numberPos < payload.length(); ++numberPos)
+    {
+        if (payload[numberPos] == ',' || payload[numberPos] == '}' || (payload[numberPos] >= '0' && payload[numberPos] <= '9'))
+            break;
+    }
+
+    if (numberPos < payload.length() && payload[numberPos] >= '0' && payload[numberPos] <= '9')
+        return strtol(payload.substr(numberPos).c_str(), nullptr, 10);
+
+    return 0;
+}
+
+namespace {
+
+std::string extractCertificate(const std::string & certificate)
+{
+    const std::string header("-----BEGIN CERTIFICATE-----");
+    const std::string footer("-----END CERTIFICATE-----");
+
+    std::string result;
+
+    size_t pos1 = certificate.find(header);
+    if (pos1 == std::string::npos)
+        return result;
+
+    size_t pos2 = certificate.find(footer, pos1 + 1);
+    if (pos2 == std::string::npos)
+        return result;
+
+    pos1 = pos1 + header.length();
+    pos2 = pos2 - pos1;
+
+    return certificate.substr(pos1, pos2);
+}
+
+std::string extractPrivateKey(const std::string & privateKey)
+{
+    const std::string header("-----BEGIN PRIVATE KEY-----");
+    const std::string footer("-----END PRIVATE KEY-----");
+
+    std::string result;
+
+    size_t pos1 = privateKey.find(header);
+    if (pos1 == std::string::npos)
+        return result;
+
+    size_t pos2 = privateKey.find(footer, pos1 + 1);
+    if (pos2 == std::string::npos)
+        return result;
+
+    pos1 = pos1 + header.length();
+    pos2 = pos2 - pos1;
+
+    return privateKey.substr(pos1, pos2);
+}
+
+OUString lcl_getCurrentDocumentMimeType(const LibLODocument_Impl* pDocument)
+{
+    SfxBaseModel* pBaseModel = dynamic_cast<SfxBaseModel*>(pDocument->mxComponent.get());
+    if (!pBaseModel)
+        return "";
+
+    SfxObjectShell* pObjectShell = pBaseModel->GetObjectShell();
+    if (!pObjectShell)
+        return "";
+
+    SfxMedium* pMedium = pObjectShell->GetMedium();
+    if (!pMedium)
+        return "";
+
+    auto pFilter = pMedium->GetFilter();
+    if (!pFilter)
+        return "";
+
+    return pFilter->GetMimeType();
+}
+
+// Gets an undo manager to enter and exit undo context. Needed by ToggleOrientation
+css::uno::Reference< css::document::XUndoManager > getUndoManager( const css::uno::Reference< css::frame::XFrame >& rxFrame )
+{
+    const css::uno::Reference< css::frame::XController >& xController = rxFrame->getController();
+    if ( xController.is() )
+    {
+        const css::uno::Reference< css::frame::XModel >& xModel = xController->getModel();
+        if ( xModel.is() )
+        {
+            const css::uno::Reference< css::document::XUndoManagerSupplier > xSuppUndo( xModel, css::uno::UNO_QUERY_THROW );
+            return css::uno::Reference< css::document::XUndoManager >( xSuppUndo->getUndoManager(), css::uno::UNO_SET_THROW );
+        }
+    }
+
+    return css::uno::Reference< css::document::XUndoManager > ();
+}
+
+// Adjusts page margins for Writer doc. Needed by ToggleOrientation
+void ExecuteMarginLRChange(
+    const tools::Long nPageLeftMargin,
+    const tools::Long nPageRightMargin,
+    SvxLongLRSpaceItem* pPageLRMarginItem)
+{
+    pPageLRMarginItem->SetLeft( nPageLeftMargin );
+    pPageLRMarginItem->SetRight( nPageRightMargin );
+    SfxViewShell::Current()->GetDispatcher()->ExecuteList(SID_ATTR_PAGE_LRSPACE,
+            SfxCallMode::RECORD, { pPageLRMarginItem });
+}
+
+// Adjusts page margins for Writer doc. Needed by ToggleOrientation
+void ExecuteMarginULChange(
+        const tools::Long nPageTopMargin,
+        const tools::Long nPageBottomMargin,
+        SvxLongULSpaceItem* pPageULMarginItem)
+{
+    pPageULMarginItem->SetUpper( nPageTopMargin );
+    pPageULMarginItem->SetLower( nPageBottomMargin );
+    SfxViewShell::Current()->GetDispatcher()->ExecuteList(SID_ATTR_PAGE_ULSPACE,
+                                                          SfxCallMode::RECORD, { pPageULMarginItem });
+}
+
+// Main function which toggles page orientation of the Writer doc. Needed by ToggleOrientation
+void ExecuteOrientationChange()
+{
+    SfxViewFrame* pViewFrm = SfxViewFrame::Current();
+    if (!pViewFrm)
+        return;
+
+    std::unique_ptr<SvxPageItem> pPageItem(new SvxPageItem(SID_ATTR_PAGE));
+
+    // 1mm in twips rounded
+    // This should be in sync with MINBODY in sw/source/uibase/sidebar/PageMarginControl.hxx
+    constexpr tools::Long MINBODY = o3tl::toTwips(1, o3tl::Length::mm);
+
+    css::uno::Reference< css::document::XUndoManager > mxUndoManager(
+                getUndoManager( pViewFrm->GetFrame().GetFrameInterface() ) );
+
+    if ( mxUndoManager.is() )
+        mxUndoManager->enterUndoContext( "" );
+
+
+    const SvxSizeItem* pSizeItem;
+    pViewFrm->GetBindings().GetDispatcher()->QueryState(SID_ATTR_PAGE_SIZE, pSizeItem);
+    std::unique_ptr<SvxSizeItem> pPageSizeItem(pSizeItem->Clone());
+
+    const SvxLongLRSpaceItem* pLRSpaceItem;
+    pViewFrm->GetBindings().GetDispatcher()->QueryState(SID_ATTR_PAGE_LRSPACE, pLRSpaceItem);
+    std::unique_ptr<SvxLongLRSpaceItem> pPageLRMarginItem(pLRSpaceItem->Clone());
+
+    const SvxLongULSpaceItem* pULSpaceItem;
+    pViewFrm->GetBindings().GetDispatcher()->QueryState(SID_ATTR_PAGE_ULSPACE, pULSpaceItem);
+    std::unique_ptr<SvxLongULSpaceItem> pPageULMarginItem(pULSpaceItem->Clone());
+
+    {
+        bool bIsLandscape = false;
+        if ( pPageSizeItem->GetSize().Width() > pPageSizeItem->GetSize().Height())
+            bIsLandscape = true;
+
+        // toggle page orientation
+        pPageItem->SetLandscape(!bIsLandscape);
+
+
+        // swap the width and height of the page size
+        const tools::Long nRotatedWidth = pPageSizeItem->GetSize().Height();
+        const tools::Long nRotatedHeight = pPageSizeItem->GetSize().Width();
+        pPageSizeItem->SetSize(Size(nRotatedWidth, nRotatedHeight));
+
+
+        // apply changed attributes
+        if (SfxViewShell::Current())
+        {
+            SfxViewShell::Current()->GetDispatcher()->ExecuteList(SID_ATTR_PAGE_SIZE,
+                SfxCallMode::RECORD, { pPageSizeItem.get(), pPageItem.get() });
+        }
+    }
+
+
+    // check, if margin values still fit to the changed page size.
+    // if not, adjust margin values
+    {
+        const tools::Long nML = pPageLRMarginItem->GetLeft();
+        const tools::Long nMR = pPageLRMarginItem->GetRight();
+        const tools::Long nTmpPW = nML + nMR + MINBODY;
+
+        const tools::Long nPW  = pPageSizeItem->GetSize().Width();
+
+        if ( nTmpPW > nPW )
+        {
+            if ( nML <= nMR )
+            {
+                ExecuteMarginLRChange( pPageLRMarginItem->GetLeft(), nMR - (nTmpPW - nPW ), pPageLRMarginItem.get() );
+            }
+            else
+            {
+                ExecuteMarginLRChange( nML - (nTmpPW - nPW ), pPageLRMarginItem->GetRight(), pPageLRMarginItem.get() );
+            }
+        }
+
+        const tools::Long nMT = pPageULMarginItem->GetUpper();
+        const tools::Long nMB = pPageULMarginItem->GetLower();
+        const tools::Long nTmpPH = nMT + nMB + MINBODY;
+
+        const tools::Long nPH  = pPageSizeItem->GetSize().Height();
+
+        if ( nTmpPH > nPH )
+        {
+            if ( nMT <= nMB )
+            {
+                ExecuteMarginULChange( pPageULMarginItem->GetUpper(), nMB - ( nTmpPH - nPH ), pPageULMarginItem.get() );
+            }
+            else
+            {
+                ExecuteMarginULChange( nMT - ( nTmpPH - nPH ), pPageULMarginItem->GetLower(), pPageULMarginItem.get() );
+            }
+        }
+    }
+
+    if ( mxUndoManager.is() )
+        mxUndoManager->leaveUndoContext();
+}
+
+void setupSidebar(std::u16string_view sidebarDeckId = u"")
+{
+    SfxViewShell* pViewShell = SfxViewShell::Current();
+    SfxViewFrame* pViewFrame = pViewShell ? pViewShell->GetViewFrame() : nullptr;
+    if (pViewFrame)
+    {
+        if (!pViewFrame->GetChildWindow(SID_SIDEBAR))
+            pViewFrame->SetChildWindow(SID_SIDEBAR, false /* create it */, true /* focus */);
+
+        pViewFrame->ShowChildWindow(SID_SIDEBAR, true);
+
+        // Force synchronous population of panels
+        SfxChildWindow *pChild = pViewFrame->GetChildWindow(SID_SIDEBAR);
+        if (!pChild)
+            return;
+
+        auto pDockingWin = dynamic_cast<sfx2::sidebar::SidebarDockingWindow *>(pChild->GetWindow());
+        if (!pDockingWin)
+            return;
+
+        if (!sidebarDeckId.empty())
+        {
+            pDockingWin->GetSidebarController()->SwitchToDeck(sidebarDeckId);
+        }
+        else
+        {
+            pDockingWin->GetSidebarController()->SwitchToDefaultDeck();
+        }
+
+        pDockingWin->SyncUpdate();
+    }
+    else
+        SetLastExceptionMsg("No view shell or sidebar");
+}
+
+void hideSidebar()
+{
+    SfxViewShell* pViewShell = SfxViewShell::Current();
+    SfxViewFrame* pViewFrame = pViewShell? pViewShell->GetViewFrame(): nullptr;
+    if (pViewFrame)
+        pViewFrame->SetChildWindow(SID_SIDEBAR, false , false );
+    else
+        SetLastExceptionMsg("No view shell or sidebar");
+}
+
+}  // end anonymous namespace
+
+// Could be anonymous in principle, but for the unit testing purposes, we
+// declare it in init.hxx.
+OUString desktop::extractParameter(OUString& rOptions, std::u16string_view rName)
+{
+    OUString aValue;
+
+    OUString aNameEquals(OUString::Concat(rName) + "=");
+    OUString aCommaNameEquals(OUString::Concat(",") + rName + "=");
+
+    int nIndex = -1;
+    if (rOptions.startsWith(aNameEquals))
+    {
+        size_t nLen = aNameEquals.getLength();
+        int nComma = rOptions.indexOf(",", nLen);
+        if (nComma >= 0)
+        {
+            aValue = rOptions.copy(nLen, nComma - nLen);
+            rOptions = rOptions.copy(nComma + 1);
+        }
+        else
+        {
+            aValue = rOptions.copy(nLen);
+            rOptions.clear();
+        }
+    }
+    else if ((nIndex = rOptions.indexOf(aCommaNameEquals)) >= 0)
+    {
+        size_t nLen = aCommaNameEquals.getLength();
+        int nComma = rOptions.indexOf(",", nIndex + nLen);
+        if (nComma >= 0)
+        {
+            aValue = rOptions.copy(nIndex + nLen, nComma - nIndex - nLen);
+            rOptions = OUString::Concat(rOptions.subView(0, nIndex)) + rOptions.subView(nComma);
+        }
+        else
+        {
+            aValue = rOptions.copy(nIndex + nLen);
+            rOptions = rOptions.copy(0, nIndex);
+        }
+    }
+
+    return aValue;
+}
+
+extern "C"
+{
+
+static void doc_destroy(LibreOfficeKitDocument* pThis);
+static int doc_saveAs(LibreOfficeKitDocument* pThis, const char* pUrl, const char* pFormat, const char* pFilterOptions);
+static int doc_getDocumentType(LibreOfficeKitDocument* pThis);
+static int doc_getParts(LibreOfficeKitDocument* pThis);
+static char* doc_getPartPageRectangles(LibreOfficeKitDocument* pThis);
+static int doc_getPart(LibreOfficeKitDocument* pThis);
+static void doc_setPart(LibreOfficeKitDocument* pThis, int nPart);
+static void doc_selectPart(LibreOfficeKitDocument* pThis, int nPart, int nSelect);
+static void doc_moveSelectedParts(LibreOfficeKitDocument* pThis, int nPosition, bool bDuplicate);
+static char* doc_getPartName(LibreOfficeKitDocument* pThis, int nPart);
+static void doc_setPartMode(LibreOfficeKitDocument* pThis, int nPartMode);
+static void doc_paintTile(LibreOfficeKitDocument* pThis,
+                          unsigned char* pBuffer,
+                          const int nCanvasWidth, const int nCanvasHeight,
+                          const int nTilePosX, const int nTilePosY,
+                          const int nTileWidth, const int nTileHeight);
+#ifdef IOS
+static void doc_paintTileToCGContext(LibreOfficeKitDocument* pThis,
+                                     void* rCGContext,
+                                     const int nCanvasWidth, const int nCanvasHeight,
+                                     const int nTilePosX, const int nTilePosY,
+                                     const int nTileWidth, const int nTileHeight);
+#endif
+static void doc_paintPartTile(LibreOfficeKitDocument* pThis,
+                              unsigned char* pBuffer,
+                              const int nPart,
+                              const int nCanvasWidth, const int nCanvasHeight,
+                              const int nTilePosX, const int nTilePosY,
+                              const int nTileWidth, const int nTileHeight);
+static int doc_getTileMode(LibreOfficeKitDocument* pThis);
+static void doc_getDocumentSize(LibreOfficeKitDocument* pThis,
+                                long* pWidth,
+                                long* pHeight);
+static void doc_initializeForRendering(LibreOfficeKitDocument* pThis,
+                                       const char* pArguments);
+
+static void doc_registerCallback(LibreOfficeKitDocument* pThis,
+                                LibreOfficeKitCallback pCallback,
+                                void* pData);
+static void doc_postKeyEvent(LibreOfficeKitDocument* pThis,
+                             int nType,
+                             int nCharCode,
+                             int nKeyCode);
+static void doc_setBlockedCommandList(LibreOfficeKitDocument* pThis,
+                                int nViewId,
+                                const char* blockedCommandList);
+
+static void doc_postWindowExtTextInputEvent(LibreOfficeKitDocument* pThis,
+                                            unsigned nWindowId,
+                                            int nType,
+                                            const char* pText);
+static void doc_removeTextContext(LibreOfficeKitDocument* pThis,
+                                  unsigned nLOKWindowId,
+                                  int nCharBefore,
+                                  int nCharAfter);
+static void doc_sendDialogEvent(LibreOfficeKitDocument* pThis,
+                               unsigned long long int nLOKWindowId,
+                               const char* pArguments);
+static void doc_postWindowKeyEvent(LibreOfficeKitDocument* pThis,
+                                   unsigned nLOKWindowId,
+                                   int nType,
+                                   int nCharCode,
+                                   int nKeyCode);
+static void doc_postMouseEvent (LibreOfficeKitDocument* pThis,
+                                int nType,
+                                int nX,
+                                int nY,
+                                int nCount,
+                                int nButtons,
+                                int nModifier);
+static void doc_postWindowMouseEvent (LibreOfficeKitDocument* pThis,
+                                      unsigned nLOKWindowId,
+                                      int nType,
+                                      int nX,
+                                      int nY,
+                                      int nCount,
+                                      int nButtons,
+                                      int nModifier);
+static void doc_postWindowGestureEvent(LibreOfficeKitDocument* pThis,
+                                      unsigned nLOKWindowId,
+                                      const char* pType,
+                                      int nX,
+                                      int nY,
+                                      int nOffset);
+static void doc_postUnoCommand(LibreOfficeKitDocument* pThis,
+                               const char* pCommand,
+                               const char* pArguments,
+                               bool bNotifyWhenFinished);
+static void doc_setWindowTextSelection(LibreOfficeKitDocument* pThis,
+                                       unsigned nLOKWindowId,
+                                       bool swap,
+                                       int nX,
+                                       int nY);
+static void doc_setTextSelection (LibreOfficeKitDocument* pThis,
+                                  int nType,
+                                  int nX,
+                                  int nY);
+static char* doc_getTextSelection(LibreOfficeKitDocument* pThis,
+                                  const char* pMimeType,
+                                  char** pUsedMimeType);
+static int doc_getSelectionType(LibreOfficeKitDocument* pThis);
+static int doc_getSelectionTypeAndText(LibreOfficeKitDocument* pThis,
+                                       const char* pMimeType,
+                                       char** pText,
+                                       char** pUsedMimeType);
+static int doc_getClipboard (LibreOfficeKitDocument* pThis,
+                             const char **pMimeTypes,
+                             size_t      *pOutCount,
+                             char      ***pOutMimeTypes,
+                             size_t     **pOutSizes,
+                             char      ***pOutStreams);
+static int doc_setClipboard (LibreOfficeKitDocument* pThis,
+                             const size_t   nInCount,
+                             const char   **pInMimeTypes,
+                             const size_t  *pInSizes,
+                             const char   **pInStreams);
+static bool doc_paste(LibreOfficeKitDocument* pThis,
+                      const char* pMimeType,
+                      const char* pData,
+                      size_t nSize);
+static void doc_setGraphicSelection (LibreOfficeKitDocument* pThis,
+                                  int nType,
+                                  int nX,
+                                  int nY);
+static void doc_resetSelection (LibreOfficeKitDocument* pThis);
+static char* doc_getCommandValues(LibreOfficeKitDocument* pThis, const char* pCommand);
+static void doc_setClientZoom(LibreOfficeKitDocument* pThis,
+                                    int nTilePixelWidth,
+                                    int nTilePixelHeight,
+                                    int nTileTwipWidth,
+                                    int nTileTwipHeight);
+static void doc_setClientVisibleArea(LibreOfficeKitDocument* pThis, int nX, int nY, int nWidth, int nHeight);
+static void doc_setOutlineState(LibreOfficeKitDocument* pThis, bool bColumn, int nLevel, int nIndex, bool bHidden);
+static int doc_createView(LibreOfficeKitDocument* pThis);
+static int doc_createViewWithOptions(LibreOfficeKitDocument* pThis, const char* pOptions);
+static void doc_destroyView(LibreOfficeKitDocument* pThis, int nId);
+static void doc_setView(LibreOfficeKitDocument* pThis, int nId);
+static int doc_getView(LibreOfficeKitDocument* pThis);
+static int doc_getViewsCount(LibreOfficeKitDocument* pThis);
+static bool doc_getViewIds(LibreOfficeKitDocument* pThis, int* pArray, size_t nSize);
+static void doc_setViewLanguage(LibreOfficeKitDocument* pThis, int nId, const char* language);
+static unsigned char* doc_renderFontOrientation(LibreOfficeKitDocument* pThis,
+                          const char *pFontName,
+                          const char *pChar,
+                          int* pFontWidth,
+                          int* pFontHeight,
+                          int pOrientation);
+static unsigned char* doc_renderFont(LibreOfficeKitDocument* pThis,
+                          const char *pFontName,
+                          const char *pChar,
+                          int* pFontWidth,
+                          int* pFontHeight);
+static char* doc_getPartHash(LibreOfficeKitDocument* pThis, int nPart);
+
+static void doc_paintWindow(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId, unsigned char* pBuffer,
+                            const int nX, const int nY,
+                            const int nWidth, const int nHeight);
+
+static void doc_paintWindowDPI(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId, unsigned char* pBuffer,
+                               const int nX, const int nY,
+                               const int nWidth, const int nHeight,
+                               const double fDPIScale);
+
+static void doc_paintWindowForView(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId, unsigned char* pBuffer,
+                                   const int nX, const int nY,
+                                   const int nWidth, const int nHeight,
+                                   const double fDPIScale, int viewId);
+
+static void doc_postWindow(LibreOfficeKitDocument* pThis, unsigned
+ nLOKWindowId, int nAction, const char* pData);
+
+static char* doc_getPartInfo(LibreOfficeKitDocument* pThis, int nPart);
+
+static bool doc_insertCertificate(LibreOfficeKitDocument* pThis,
+                                  const unsigned char* pCertificateBinary,
+                                  const int nCertificateBinarySize,
+                                  const unsigned char* pPrivateKeyBinary,
+                                  const int nPrivateKeyBinarySize);
+
+static bool doc_addCertificate(LibreOfficeKitDocument* pThis,
+                                 const unsigned char* pCertificateBinary,
+                                 const int nCertificateBinarySize);
+
+static int doc_getSignatureState(LibreOfficeKitDocument* pThis);
+
+static size_t doc_renderShapeSelection(LibreOfficeKitDocument* pThis, char** pOutput);
+
+static void doc_resizeWindow(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId,
+                             const int nWidth, const int nHeight);
+
+static void doc_completeFunction(LibreOfficeKitDocument* pThis, const char*);
+
+
+static void doc_sendFormFieldEvent(LibreOfficeKitDocument* pThis,
+                                   const char* pArguments);
+
+static bool doc_renderSearchResult(LibreOfficeKitDocument* pThis,
+                                 const char* pSearchResult, unsigned char** pBitmapBuffer,
+                                 int* pWidth, int* pHeight, size_t* pByteSize);
+
+static void doc_sendContentControlEvent(LibreOfficeKitDocument* pThis, const char* pArguments);
+
+} // extern "C"
+
+namespace {
+ITiledRenderable* getTiledRenderable(LibreOfficeKitDocument* pThis)
+{
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+    return dynamic_cast<ITiledRenderable*>(pDocument->mxComponent.get());
+}
+
+#ifndef IOS
+
+/*
+ * Unfortunately clipboard creation using UNO is insanely baroque.
+ * we also need to ensure that this works for the first view which
+ * has no clear 'createView' called for it (unfortunately).
+ */
+rtl::Reference<LOKClipboard> forceSetClipboardForCurrentView(LibreOfficeKitDocument *pThis)
+{
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    rtl::Reference<LOKClipboard> xClip(LOKClipboardFactory::getClipboardForCurView());
+
+    SAL_INFO("lok", "Set to clipboard for view " << xClip.get());
+    // FIXME: using a hammer here - should not be necessary if all tests used createView.
+    pDoc->setClipboard(uno::Reference<datatransfer::clipboard::XClipboard>(xClip->getXI(), UNO_QUERY));
+
+    return xClip;
+}
+
+#endif
+
+const vcl::Font* FindFont(std::u16string_view rFontName)
+{
+    SfxObjectShell* pDocSh = SfxObjectShell::Current();
+    if (!pDocSh)
+        return nullptr;
+    const SvxFontListItem* pFonts
+        = static_cast<const SvxFontListItem*>(pDocSh->GetItem(SID_ATTR_CHAR_FONTLIST));
+    const FontList* pList = pFonts ? pFonts->GetFontList() : nullptr;
+    if (pList && !rFontName.empty())
+        if (sal_Handle hMetric = pList->GetFirstFontMetric(rFontName))
+            return &FontList::GetFontMetric(hMetric);
+    return nullptr;
+}
+
+vcl::Font FindFont_FallbackToDefault(std::u16string_view rFontName)
+{
+    if (auto pFound = FindFont(rFontName))
+        return *pFound;
+
+    return OutputDevice::GetDefaultFont(DefaultFontType::SANS_UNICODE, LANGUAGE_NONE,
+                                        GetDefaultFontFlags::NONE);
+}
+} // anonymous namespace
+
+LibLODocument_Impl::LibLODocument_Impl(uno::Reference <css::lang::XComponent> xComponent, int nDocumentId)
+    : mxComponent(std::move(xComponent))
+    , mnDocumentId(nDocumentId)
+{
+    assert(nDocumentId != -1 && "Cannot set mnDocumentId to -1");
+
+    m_pDocumentClass = gDocumentClass.lock();
+    if (!m_pDocumentClass)
+    {
+        m_pDocumentClass = std::make_shared<LibreOfficeKitDocumentClass>();
+
+        m_pDocumentClass->nSize = sizeof(LibreOfficeKitDocumentClass);
+
+        m_pDocumentClass->destroy = doc_destroy;
+        m_pDocumentClass->saveAs = doc_saveAs;
+        m_pDocumentClass->getDocumentType = doc_getDocumentType;
+        m_pDocumentClass->getParts = doc_getParts;
+        m_pDocumentClass->getPartPageRectangles = doc_getPartPageRectangles;
+        m_pDocumentClass->getPart = doc_getPart;
+        m_pDocumentClass->setPart = doc_setPart;
+        m_pDocumentClass->selectPart = doc_selectPart;
+        m_pDocumentClass->moveSelectedParts = doc_moveSelectedParts;
+        m_pDocumentClass->getPartName = doc_getPartName;
+        m_pDocumentClass->setPartMode = doc_setPartMode;
+        m_pDocumentClass->paintTile = doc_paintTile;
+#ifdef IOS
+        m_pDocumentClass->paintTileToCGContext = doc_paintTileToCGContext;
+#endif
+        m_pDocumentClass->paintPartTile = doc_paintPartTile;
+        m_pDocumentClass->getTileMode = doc_getTileMode;
+        m_pDocumentClass->getDocumentSize = doc_getDocumentSize;
+        m_pDocumentClass->initializeForRendering = doc_initializeForRendering;
+        m_pDocumentClass->registerCallback = doc_registerCallback;
+        m_pDocumentClass->postKeyEvent = doc_postKeyEvent;
+        m_pDocumentClass->postWindowExtTextInputEvent = doc_postWindowExtTextInputEvent;
+        m_pDocumentClass->removeTextContext = doc_removeTextContext;
+        m_pDocumentClass->postWindowKeyEvent = doc_postWindowKeyEvent;
+        m_pDocumentClass->postMouseEvent = doc_postMouseEvent;
+        m_pDocumentClass->postWindowMouseEvent = doc_postWindowMouseEvent;
+        m_pDocumentClass->sendDialogEvent = doc_sendDialogEvent;
+        m_pDocumentClass->postUnoCommand = doc_postUnoCommand;
+        m_pDocumentClass->setTextSelection = doc_setTextSelection;
+        m_pDocumentClass->setWindowTextSelection = doc_setWindowTextSelection;
+        m_pDocumentClass->getTextSelection = doc_getTextSelection;
+        m_pDocumentClass->getSelectionType = doc_getSelectionType;
+        m_pDocumentClass->getSelectionTypeAndText = doc_getSelectionTypeAndText;
+        m_pDocumentClass->getClipboard = doc_getClipboard;
+        m_pDocumentClass->setClipboard = doc_setClipboard;
+        m_pDocumentClass->paste = doc_paste;
+        m_pDocumentClass->setGraphicSelection = doc_setGraphicSelection;
+        m_pDocumentClass->resetSelection = doc_resetSelection;
+        m_pDocumentClass->getCommandValues = doc_getCommandValues;
+        m_pDocumentClass->setClientZoom = doc_setClientZoom;
+        m_pDocumentClass->setClientVisibleArea = doc_setClientVisibleArea;
+        m_pDocumentClass->setOutlineState = doc_setOutlineState;
+
+        m_pDocumentClass->createView = doc_createView;
+        m_pDocumentClass->destroyView = doc_destroyView;
+        m_pDocumentClass->setView = doc_setView;
+        m_pDocumentClass->getView = doc_getView;
+        m_pDocumentClass->getViewsCount = doc_getViewsCount;
+        m_pDocumentClass->getViewIds = doc_getViewIds;
+
+        m_pDocumentClass->renderFont = doc_renderFont;
+        m_pDocumentClass->renderFontOrientation = doc_renderFontOrientation;
+        m_pDocumentClass->getPartHash = doc_getPartHash;
+
+        m_pDocumentClass->paintWindow = doc_paintWindow;
+        m_pDocumentClass->paintWindowDPI = doc_paintWindowDPI;
+        m_pDocumentClass->paintWindowForView = doc_paintWindowForView;
+        m_pDocumentClass->postWindow = doc_postWindow;
+        m_pDocumentClass->resizeWindow = doc_resizeWindow;
+
+        m_pDocumentClass->setViewLanguage = doc_setViewLanguage;
+
+        m_pDocumentClass->getPartInfo = doc_getPartInfo;
+
+        m_pDocumentClass->insertCertificate = doc_insertCertificate;
+        m_pDocumentClass->addCertificate = doc_addCertificate;
+        m_pDocumentClass->getSignatureState = doc_getSignatureState;
+
+        m_pDocumentClass->renderShapeSelection = doc_renderShapeSelection;
+        m_pDocumentClass->postWindowGestureEvent = doc_postWindowGestureEvent;
+
+        m_pDocumentClass->createViewWithOptions = doc_createViewWithOptions;
+        m_pDocumentClass->completeFunction = doc_completeFunction;
+
+        m_pDocumentClass->sendFormFieldEvent = doc_sendFormFieldEvent;
+        m_pDocumentClass->renderSearchResult = doc_renderSearchResult;
+
+        m_pDocumentClass->setBlockedCommandList = doc_setBlockedCommandList;
+
+        m_pDocumentClass->sendContentControlEvent = doc_sendContentControlEvent;
+
+        gDocumentClass = m_pDocumentClass;
+    }
+    pClass = m_pDocumentClass.get();
+
+#ifndef IOS
+    forceSetClipboardForCurrentView(this);
+#endif
+}
+
+LibLODocument_Impl::~LibLODocument_Impl()
+{
+    try
+    {
+        mxComponent->dispose();
+    }
+    catch (const css::lang::DisposedException&)
+    {
+        TOOLS_WARN_EXCEPTION("lok", "failed to dispose document");
+    }
+}
+
+static OUString getGenerator()
+{
+    OUString sGenerator(
+        Translate::ExpandVariables("%PRODUCTNAME %PRODUCTVERSION%PRODUCTEXTENSION (%1)"));
+    OUString os("$_OS");
+    ::rtl::Bootstrap::expandMacros(os);
+    return sGenerator.replaceFirst("%1", os);
+}
+
+extern "C" {
+
+CallbackFlushHandler::TimeoutIdle::TimeoutIdle( CallbackFlushHandler* handler )
+    : Timer( "lokit timer callback" )
+    , mHandler( handler )
+{
+    // A second timer with higher priority, it'll ensure we flush in reasonable time if we get too busy
+    // to get POST_PAINT priority processing. Otherwise it could take a long time to flush.
+    SetPriority(TaskPriority::DEFAULT);
+    SetTimeout( 100 ); // 100 ms
+}
+
+void CallbackFlushHandler::TimeoutIdle::Invoke()
+{
+    mHandler->Invoke();
+}
+
+// One of these is created per view to handle events cf. doc_registerCallback
+CallbackFlushHandler::CallbackFlushHandler(LibreOfficeKitDocument* pDocument, LibreOfficeKitCallback pCallback, void* pData)
+    : Idle( "lokit idle callback" ),
+      m_pDocument(pDocument),
+      m_pCallback(pCallback),
+      m_pData(pData),
+      m_nDisableCallbacks(0),
+      m_TimeoutIdle( this )
+{
+    SetPriority(TaskPriority::POST_PAINT);
+
+    // Add the states that are safe to skip duplicates on, even when
+    // not consequent (i.e. do no emit them if unchanged from last).
+    m_states.emplace(LOK_CALLBACK_TEXT_SELECTION, "NIL");
+    m_states.emplace(LOK_CALLBACK_GRAPHIC_SELECTION, "NIL");
+    m_states.emplace(LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR, "NIL");
+    m_states.emplace(LOK_CALLBACK_STATE_CHANGED, "NIL");
+    m_states.emplace(LOK_CALLBACK_MOUSE_POINTER, "NIL");
+    m_states.emplace(LOK_CALLBACK_CELL_CURSOR, "NIL");
+    m_states.emplace(LOK_CALLBACK_CELL_FORMULA, "NIL");
+    m_states.emplace(LOK_CALLBACK_CELL_ADDRESS, "NIL");
+    m_states.emplace(LOK_CALLBACK_CURSOR_VISIBLE, "NIL");
+    m_states.emplace(LOK_CALLBACK_SET_PART, "NIL");
+    m_states.emplace(LOK_CALLBACK_TABLE_SELECTED, "NIL");
+    m_states.emplace(LOK_CALLBACK_TAB_STOP_LIST, "NIL");
+    m_states.emplace(LOK_CALLBACK_RULER_UPDATE, "NIL");
+    m_states.emplace(LOK_CALLBACK_STATUS_INDICATOR_SET_VALUE, "NIL");
+}
+
+CallbackFlushHandler::~CallbackFlushHandler()
+{
+    Stop();
+}
+
+CallbackFlushHandler::queue_type2::iterator CallbackFlushHandler::toQueue2(CallbackFlushHandler::queue_type1::iterator pos)
+{
+    int delta = std::distance(m_queue1.begin(), pos);
+    return m_queue2.begin() + delta;
+}
+
+CallbackFlushHandler::queue_type2::reverse_iterator CallbackFlushHandler::toQueue2(CallbackFlushHandler::queue_type1::reverse_iterator pos)
+{
+    int delta = std::distance(m_queue1.rbegin(), pos);
+    return m_queue2.rbegin() + delta;
+}
+
+void CallbackFlushHandler::setUpdatedType( int nType, bool value )
+{
+    assert(isUpdatedType(nType));
+    if( m_updatedTypes.size() <= o3tl::make_unsigned( nType ))
+        m_updatedTypes.resize( nType + 1 ); // new are default-constructed, i.e. false
+    m_updatedTypes[ nType ] = value;
+    if(value)
+        startTimer();
+}
+
+void CallbackFlushHandler::resetUpdatedType( int nType )
+{
+    setUpdatedType( nType, false );
+}
+
+void CallbackFlushHandler::setUpdatedTypePerViewId( int nType, int nViewId, int nSourceViewId, bool value )
+{
+    assert(isUpdatedTypePerViewId(nType));
+    std::vector<PerViewIdData>& types = m_updatedTypesPerViewId[ nViewId ];
+    if( types.size() <= o3tl::make_unsigned( nType ))
+        types.resize( nType + 1 ); // new are default-constructed, i.e. 'set' is false
+    types[ nType ] = PerViewIdData{ value, nSourceViewId };
+    if(value)
+        startTimer();
+}
+
+void CallbackFlushHandler::resetUpdatedTypePerViewId( int nType, int nViewId )
+{
+    assert(isUpdatedTypePerViewId(nType));
+    bool allViewIds = false;
+    // Handle specially messages that do not have viewId for backwards compatibility.
+    if( nType == LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR && !comphelper::LibreOfficeKit::isViewIdForVisCursorInvalidation())
+        allViewIds = true;
+    if( !allViewIds )
+    {
+        setUpdatedTypePerViewId( nType, nViewId, -1, false );
+        return;
+    }
+    for( auto& it : m_updatedTypesPerViewId )
+    {
+        std::vector<PerViewIdData>& types = it.second;
+        if( types.size() >= o3tl::make_unsigned( nType ))
+            types[ nType ].set = false;
+    }
+}
+
+void CallbackFlushHandler::libreOfficeKitViewCallback(int nType, const char* pPayload)
+{
+    CallbackData callbackData(pPayload);
+    queue(nType, callbackData);
+}
+
+void CallbackFlushHandler::libreOfficeKitViewCallbackWithViewId(int nType, const char* pPayload, int nViewId)
+{
+    CallbackData callbackData(pPayload, nViewId);
+    queue(nType, callbackData);
+}
+
+void CallbackFlushHandler::libreOfficeKitViewInvalidateTilesCallback(const tools::Rectangle* pRect, int nPart)
+{
+    CallbackData callbackData(pRect, nPart);
+    queue(LOK_CALLBACK_INVALIDATE_TILES, callbackData);
+}
+
+void CallbackFlushHandler::libreOfficeKitViewUpdatedCallback(int nType)
+{
+    assert(isUpdatedType( nType ));
+    std::unique_lock<std::recursive_mutex> lock(m_mutex);
+    SAL_INFO("lok", "Updated: [" << nType << "]");
+    setUpdatedType(nType, true);
+}
+
+void CallbackFlushHandler::libreOfficeKitViewUpdatedCallbackPerViewId(int nType, int nViewId, int nSourceViewId)
+{
+    assert(isUpdatedTypePerViewId( nType ));
+    std::unique_lock<std::recursive_mutex> lock(m_mutex);
+    SAL_INFO("lok", "Updated: [" << nType << "]");
+    setUpdatedTypePerViewId(nType, nViewId, nSourceViewId, true);
+}
+
+void CallbackFlushHandler::queue(const int type, const char* data)
+{
+    CallbackData callbackData(data);
+    queue(type, callbackData);
+}
+
+void CallbackFlushHandler::queue(const int type, CallbackData& aCallbackData)
+{
+    comphelper::ProfileZone aZone("CallbackFlushHandler::queue");
+
+    SAL_INFO("lok", "Queue: [" << type << "]: [" << aCallbackData.getPayload() << "] on " << m_queue1.size() << " entries.");
+
+    bool bIsChartActive = false;
+    bool bIsComment = false;
+    if (type == LOK_CALLBACK_GRAPHIC_SELECTION)
+    {
+        LokChartHelper aChartHelper(SfxViewShell::Current());
+        bIsChartActive = aChartHelper.GetWindow() != nullptr;
+    }
+    else if (type == LOK_CALLBACK_COMMENT)
+    {
+        bIsComment = true;
+    }
+
+    if (callbacksDisabled() && !bIsChartActive && !bIsComment)
+    {
+        // We drop notifications when this is set, except for important ones.
+        // When we issue a complex command (such as .uno:InsertAnnotation)
+        // there will be multiple notifications. On the first invalidation
+        // we will start painting, but other events will get fired
+        // while the complex command in question executes.
+        // We don't want to suppress everything here on the wrong assumption
+        // that no new events are fired during painting.
+        if (type != LOK_CALLBACK_STATE_CHANGED &&
+            type != LOK_CALLBACK_INVALIDATE_TILES &&
+            type != LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR &&
+            type != LOK_CALLBACK_CURSOR_VISIBLE &&
+            type != LOK_CALLBACK_VIEW_CURSOR_VISIBLE &&
+            type != LOK_CALLBACK_TEXT_SELECTION &&
+            type != LOK_CALLBACK_TEXT_SELECTION_START &&
+            type != LOK_CALLBACK_TEXT_SELECTION_END &&
+            type != LOK_CALLBACK_REFERENCE_MARKS)
+        {
+            SAL_INFO("lok", "Skipping while painting [" << type << "]: [" << aCallbackData.getPayload() << "].");
+            return;
+        }
+
+        // In Writer we drop all notifications during painting.
+        if (doc_getDocumentType(m_pDocument) == LOK_DOCTYPE_TEXT)
+            return;
+    }
+
+    // Suppress invalid payloads.
+    if (type == LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR &&
+        aCallbackData.getPayload().find(", 0, 0, ") != std::string::npos &&
+        aCallbackData.getPayload().find("\"hyperlink\":\"\"") == std::string::npos &&
+        aCallbackData.getPayload().find("\"hyperlink\": {}") == std::string::npos)
+    {
+        // The cursor position is often the relative coordinates of the widget
+        // issuing it, instead of the absolute one that we expect.
+        // This is temporary however, and, once the control is created and initialized
+        // correctly, it eventually emits the correct absolute coordinates.
+        SAL_INFO("lok", "Skipping invalid event [" << type << "]: [" << aCallbackData.getPayload() << "].");
+        return;
+    }
+
+    std::unique_lock<std::recursive_mutex> lock(m_mutex);
+
+    // Update types should be received via the updated callbacks for performance,
+    // getting them as normal callbacks is technically not wrong, but probably should be avoided.
+    // Reset the updated flag if we get a normal message.
+    if(isUpdatedType(type))
+    {
+        SAL_INFO("lok", "Received event with updated type [" << type << "] as normal callback");
+        resetUpdatedType(type);
+    }
+    if(isUpdatedTypePerViewId(type))
+    {
+        SAL_INFO("lok", "Received event with updated type [" << type << "] as normal callback");
+        resetUpdatedTypePerViewId(type, aCallbackData.getViewId());
+    }
+
+    // drop duplicate callbacks for the listed types
+    switch (type)
+    {
+        case LOK_CALLBACK_TEXT_SELECTION_START:
+        case LOK_CALLBACK_TEXT_SELECTION_END:
+        case LOK_CALLBACK_TEXT_SELECTION:
+        case LOK_CALLBACK_GRAPHIC_SELECTION:
+        case LOK_CALLBACK_GRAPHIC_VIEW_SELECTION:
+        case LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR:
+        case LOK_CALLBACK_INVALIDATE_VIEW_CURSOR:
+        case LOK_CALLBACK_STATE_CHANGED:
+        case LOK_CALLBACK_MOUSE_POINTER:
+        case LOK_CALLBACK_CELL_CURSOR:
+        case LOK_CALLBACK_CELL_VIEW_CURSOR:
+        case LOK_CALLBACK_CELL_FORMULA:
+        case LOK_CALLBACK_CELL_ADDRESS:
+        case LOK_CALLBACK_CELL_SELECTION_AREA:
+        case LOK_CALLBACK_CURSOR_VISIBLE:
+        case LOK_CALLBACK_VIEW_CURSOR_VISIBLE:
+        case LOK_CALLBACK_SET_PART:
+        case LOK_CALLBACK_TEXT_VIEW_SELECTION:
+        case LOK_CALLBACK_INVALIDATE_HEADER:
+        case LOK_CALLBACK_WINDOW:
+        case LOK_CALLBACK_CALC_FUNCTION_LIST:
+        case LOK_CALLBACK_INVALIDATE_SHEET_GEOMETRY:
+        case LOK_CALLBACK_REFERENCE_MARKS:
+        case LOK_CALLBACK_CELL_AUTO_FILL_AREA:
+        {
+            const auto& pos = std::find(m_queue1.rbegin(), m_queue1.rend(), type);
+            auto pos2 = toQueue2(pos);
+            if (pos != m_queue1.rend() && pos2->getPayload() == aCallbackData.getPayload())
+            {
+                SAL_INFO("lok", "Skipping queue duplicate [" << type << + "]: [" << aCallbackData.getPayload() << "].");
+                return;
+            }
+        }
+        break;
+    }
+
+    if (type == LOK_CALLBACK_TEXT_SELECTION && aCallbackData.isEmpty())
+    {
+        const auto& posStart = std::find(m_queue1.rbegin(), m_queue1.rend(), LOK_CALLBACK_TEXT_SELECTION_START);
+        auto posStart2 = toQueue2(posStart);
+        if (posStart != m_queue1.rend())
+            posStart2->clear();
+
+        const auto& posEnd = std::find(m_queue1.rbegin(), m_queue1.rend(), LOK_CALLBACK_TEXT_SELECTION_END);
+        auto posEnd2 = toQueue2(posEnd);
+        if (posEnd != m_queue1.rend())
+            posEnd2->clear();
+    }
+
+    // When payload is empty discards any previous state.
+    if (aCallbackData.isEmpty())
+    {
+        switch (type)
+        {
+            case LOK_CALLBACK_TEXT_SELECTION_START:
+            case LOK_CALLBACK_TEXT_SELECTION_END:
+            case LOK_CALLBACK_TEXT_SELECTION:
+            case LOK_CALLBACK_GRAPHIC_SELECTION:
+            case LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR:
+            case LOK_CALLBACK_INVALIDATE_TILES:
+                if (removeAll(type))
+                    SAL_INFO("lok", "Removed dups of [" << type << "]: [" << aCallbackData.getPayload() << "].");
+                break;
+        }
+    }
+    else
+    {
+        switch (type)
+        {
+            // These are safe to use the latest state and ignore previous
+            // ones (if any) since the last overrides previous ones.
+            case LOK_CALLBACK_TEXT_SELECTION_START:
+            case LOK_CALLBACK_TEXT_SELECTION_END:
+            case LOK_CALLBACK_TEXT_SELECTION:
+            case LOK_CALLBACK_MOUSE_POINTER:
+            case LOK_CALLBACK_CELL_CURSOR:
+            case LOK_CALLBACK_CELL_FORMULA:
+            case LOK_CALLBACK_CELL_ADDRESS:
+            case LOK_CALLBACK_CURSOR_VISIBLE:
+            case LOK_CALLBACK_SET_PART:
+            case LOK_CALLBACK_STATUS_INDICATOR_SET_VALUE:
+            case LOK_CALLBACK_RULER_UPDATE:
+            {
+                if (removeAll(type))
+                    SAL_INFO("lok", "Removed dups of [" << type << "]: [" << aCallbackData.getPayload() << "].");
+            }
+            break;
+
+            // These are safe to use the latest state and ignore previous
+            // ones (if any) since the last overrides previous ones,
+            // but only if the view is the same.
+            case LOK_CALLBACK_CELL_VIEW_CURSOR:
+            case LOK_CALLBACK_GRAPHIC_VIEW_SELECTION:
+            case LOK_CALLBACK_INVALIDATE_VIEW_CURSOR:
+            case LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR:
+            case LOK_CALLBACK_TEXT_VIEW_SELECTION:
+            case LOK_CALLBACK_VIEW_CURSOR_VISIBLE:
+            case LOK_CALLBACK_CALC_FUNCTION_LIST:
+            case LOK_CALLBACK_FORM_FIELD_BUTTON:
+            {
+                // deleting the duplicate of visible cursor message can cause hyperlink popup not to show up on second/or more click on the same place.
+                // If the hyperlink is not empty we can bypass that to show the popup
+                const bool hyperLinkException = type == LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR &&
+                    aCallbackData.getPayload().find("\"hyperlink\":\"\"") == std::string::npos &&
+                    aCallbackData.getPayload().find("\"hyperlink\": {}") == std::string::npos;
+                if(!hyperLinkException)
+                {
+                    const int nViewId = aCallbackData.getViewId();
+                    removeAll(type, [nViewId] (const CallbackData& elemData) {
+                            return (nViewId == elemData.getViewId());
+                        }
+                    );
+                }
+            }
+            break;
+
+            case LOK_CALLBACK_INVALIDATE_TILES:
+                if (processInvalidateTilesEvent(type, aCallbackData))
+                    return;
+            break;
+
+            // State changes with same name override previous ones with a different value.
+            // Ex. ".uno:PageStatus=Slide 20 of 83" overwrites any previous PageStatus.
+            case LOK_CALLBACK_STATE_CHANGED:
+            {
+                // Compare the state name=value and overwrite earlier entries with same name.
+                const auto pos = aCallbackData.getPayload().find('=');
+                if (pos != std::string::npos)
+                {
+                    const std::string name = aCallbackData.getPayload().substr(0, pos + 1);
+                    // This is needed because otherwise it creates some problems when
+                    // a save occurs while a cell is still edited in Calc.
+                    if (name != ".uno:ModifiedStatus=")
+                    {
+                        removeAll(type, [&name] (const CallbackData& elemData) {
+                                return (elemData.getPayload().compare(0, name.size(), name) == 0);
+                            }
+                        );
+                    }
+                }
+            }
+            break;
+
+            case LOK_CALLBACK_WINDOW:
+                if (processWindowEvent(type, aCallbackData))
+                    return;
+            break;
+
+            case LOK_CALLBACK_GRAPHIC_SELECTION:
+            {
+                // remove only selection ranges and 'EMPTY' messages
+                // always send 'INPLACE' and 'INPLACE EXIT' messages
+                removeAll(type, [] (const CallbackData& elemData)
+                    { return (elemData.getPayload().find("INPLACE") == std::string::npos); });
+            }
+            break;
+        }
+    }
+
+    // Validate that the cached data and the payload string are identical.
+    assert(aCallbackData.validate() && "Cached callback payload object and string mismatch!");
+    m_queue1.emplace_back(type);
+    m_queue2.emplace_back(aCallbackData);
+    SAL_INFO("lok", "Queued #" << (m_queue1.size() - 1) <<
+             " [" << type << "]: [" << aCallbackData.getPayload() << "] to have " << m_queue1.size() << " entries.");
+
+#ifdef DBG_UTIL
+    {
+        // Dump the queue state and validate cached data.
+        int i = 1;
+        std::ostringstream oss;
+        if (m_queue1.empty())
+            oss << "Empty";
+        else
+            oss << m_queue1.size() << " items\n";
+        auto it1 = m_queue1.begin();
+        auto it2 = m_queue2.begin();
+        for (; it1 != m_queue1.end(); ++it1, ++it2)
+            oss << i++ << ": [" << *it1 << "] [" << it2->getPayload() << "].\n";
+        SAL_INFO("lok", "Current Queue: " << oss.str());
+        assert(
+            std::all_of(
+                m_queue2.begin(), m_queue2.end(),
+                [](const CallbackData& c) { return c.validate(); }));
+    }
+#endif
+
+    lock.unlock();
+    startTimer();
+}
+
+bool CallbackFlushHandler::processInvalidateTilesEvent(int type, CallbackData& aCallbackData)
+{
+    RectangleAndPart rcNew = aCallbackData.getRectangleAndPart();
+    if (rcNew.isEmpty())
+    {
+        SAL_INFO("lok", "Skipping invalid event [" << type << "]: [" << aCallbackData.getPayload() << "].");
+        return true;
+    }
+
+    // If we have to invalidate all tiles, we can skip any new tile invalidation.
+    // Find the last INVALIDATE_TILES entry, if any to see if it's invalidate-all.
+    const auto& pos
+        = std::find(m_queue1.rbegin(), m_queue1.rend(), LOK_CALLBACK_INVALIDATE_TILES);
+    if (pos != m_queue1.rend())
+    {
+        auto pos2 = toQueue2(pos);
+        const RectangleAndPart& rcOld = pos2->getRectangleAndPart();
+        if (rcOld.isInfinite() && (rcOld.m_nPart == -1 || rcOld.m_nPart == rcNew.m_nPart))
+        {
+            SAL_INFO("lok", "Skipping queue [" << type << "]: [" << aCallbackData.getPayload()
+                                               << "] since all tiles need to be invalidated.");
+            return true;
+        }
+
+        if (rcOld.m_nPart == -1 || rcOld.m_nPart == rcNew.m_nPart)
+        {
+            // If fully overlapping.
+            if (rcOld.m_aRectangle.Contains(rcNew.m_aRectangle))
+            {
+                SAL_INFO("lok", "Skipping queue [" << type << "]: [" << aCallbackData.getPayload()
+                                                   << "] since overlaps existing all-parts.");
+                return true;
+            }
+        }
+    }
+
+    if (rcNew.isInfinite())
+    {
+        SAL_INFO("lok", "Have Empty [" << type << "]: [" << aCallbackData.getPayload()
+                                       << "] so removing all with part " << rcNew.m_nPart << ".");
+        removeAll(LOK_CALLBACK_INVALIDATE_TILES, [&rcNew](const CallbackData& elemData) {
+            // Remove exiting if new is all-encompassing, or if of the same part.
+            return (rcNew.m_nPart == -1 || rcNew.m_nPart == elemData.getRectangleAndPart().m_nPart);
+        });
+    }
+    else
+    {
+        const auto rcOrig = rcNew;
+
+        SAL_INFO("lok", "Have [" << type << "]: [" << aCallbackData.getPayload() << "] so merging overlapping.");
+        removeAll(LOK_CALLBACK_INVALIDATE_TILES,[&rcNew](const CallbackData& elemData) {
+            const RectangleAndPart& rcOld = elemData.getRectangleAndPart();
+            if (rcNew.m_nPart != -1 && rcOld.m_nPart != -1 && rcOld.m_nPart != rcNew.m_nPart)
+            {
+                SAL_INFO("lok", "Nothing to merge between new: "
+                                    << rcNew.toString() << ", and old: " << rcOld.toString());
+                return false;
+            }
+
+            if (rcNew.m_nPart == -1)
+            {
+                // Don't merge unless fully overlapped.
+                SAL_INFO("lok", "New " << rcNew.toString() << " has " << rcOld.toString()
+                                       << "?");
+                if (rcNew.m_aRectangle.Contains(rcOld.m_aRectangle))
+                {
+                    SAL_INFO("lok", "New " << rcNew.toString() << " engulfs old "
+                                           << rcOld.toString() << ".");
+                    return true;
+                }
+            }
+            else if (rcOld.m_nPart == -1)
+            {
+                // Don't merge unless fully overlapped.
+                SAL_INFO("lok", "Old " << rcOld.toString() << " has " << rcNew.toString()
+                                       << "?");
+                if (rcOld.m_aRectangle.Contains(rcNew.m_aRectangle))
+                {
+                    SAL_INFO("lok", "New " << rcNew.toString() << " engulfs old "
+                                           << rcOld.toString() << ".");
+                    return true;
+                }
+            }
+            else
+            {
+                const tools::Rectangle rcOverlap
+                    = rcNew.m_aRectangle.GetIntersection(rcOld.m_aRectangle);
+                const bool bOverlap = !rcOverlap.IsEmpty();
+                SAL_INFO("lok", "Merging " << rcNew.toString() << " & " << rcOld.toString()
+                                           << " => " << rcOverlap.toString()
+                                           << " Overlap: " << bOverlap);
+                if (bOverlap)
+                {
+                    rcNew.m_aRectangle.Union(rcOld.m_aRectangle);
+                    SAL_INFO("lok", "Merged: " << rcNew.toString());
+                    return true;
+                }
+            }
+
+            // Keep others.
+            return false;
+        });
+
+        if (rcNew.m_aRectangle != rcOrig.m_aRectangle)
+        {
+            SAL_INFO("lok", "Replacing: " << rcOrig.toString() << " by " << rcNew.toString());
+            if (rcNew.m_aRectangle.GetWidth() < rcOrig.m_aRectangle.GetWidth()
+                || rcNew.m_aRectangle.GetHeight() < rcOrig.m_aRectangle.GetHeight())
+            {
+                SAL_WARN("lok", "Error: merged rect smaller.");
+            }
+        }
+    }
+
+    aCallbackData.updateRectangleAndPart(rcNew);
+    // Queue this one.
+    return false;
+}
+
+bool CallbackFlushHandler::processWindowEvent(int type, CallbackData& aCallbackData)
+{
+    const std::string& payload = aCallbackData.getPayload();
+
+    boost::property_tree::ptree& aTree = aCallbackData.setJson(payload);
+    const unsigned nLOKWindowId = aTree.get<unsigned>("id", 0);
+    const std::string aAction = aTree.get<std::string>("action", "");
+    if (aAction == "invalidate")
+    {
+        std::string aRectStr = aTree.get<std::string>("rectangle", "");
+        // no 'rectangle' field => invalidate all of the window =>
+        // remove all previous window part invalidations
+        if (aRectStr.empty())
+        {
+            removeAll(LOK_CALLBACK_WINDOW,[&nLOKWindowId](const CallbackData& elemData) {
+                const boost::property_tree::ptree& aOldTree = elemData.getJson();
+                if (nLOKWindowId == aOldTree.get<unsigned>("id", 0)
+                    && aOldTree.get<std::string>("action", "") == "invalidate")
+                {
+                    return true;
+                }
+                return false;
+            });
+        }
+        else
+        {
+            // if we have to invalidate all of the window, ignore
+            // any part invalidation message
+            bool invAllExist = false;
+            auto it1 = m_queue1.rbegin();
+            auto it2 = m_queue2.rbegin();
+            for (;it1 != m_queue1.rend(); ++it1, ++it2)
+            {
+                if (*it1 != LOK_CALLBACK_WINDOW)
+                    continue;
+                const boost::property_tree::ptree& aOldTree = it2->getJson();
+                if (nLOKWindowId == aOldTree.get<unsigned>("id", 0)
+                     && aOldTree.get<std::string>("action", "") == "invalidate"
+                     && aOldTree.get<std::string>("rectangle", "").empty())
+                {
+                    invAllExist = true;
+                    break;
+                }
+            }
+
+            // we found a invalidate-all window callback
+            if (invAllExist)
+            {
+                SAL_INFO("lok.dialog", "Skipping queue ["
+                                           << type << "]: [" << payload
+                                           << "] since whole window needs to be invalidated.");
+                return true;
+            }
+
+            std::istringstream aRectStream(aRectStr);
+            tools::Long nLeft, nTop, nWidth, nHeight;
+            char nComma;
+            aRectStream >> nLeft >> nComma >> nTop >> nComma >> nWidth >> nComma >> nHeight;
+            tools::Rectangle aNewRect(nLeft, nTop, nLeft + nWidth, nTop + nHeight);
+            bool currentIsRedundant = false;
+            removeAll(LOK_CALLBACK_WINDOW, [&aNewRect, &nLOKWindowId,
+                       &currentIsRedundant](const CallbackData& elemData) {
+                const boost::property_tree::ptree& aOldTree = elemData.getJson();
+                if (aOldTree.get<std::string>("action", "") == "invalidate")
+                {
+                    // Not possible that we encounter an empty rectangle here; we already handled this case above.
+                    std::istringstream aOldRectStream(aOldTree.get<std::string>("rectangle", ""));
+                    tools::Long nOldLeft, nOldTop, nOldWidth, nOldHeight;
+                    char nOldComma;
+                    aOldRectStream >> nOldLeft >> nOldComma >> nOldTop >> nOldComma >> nOldWidth
+                        >> nOldComma >> nOldHeight;
+                    const tools::Rectangle aOldRect = tools::Rectangle(
+                        nOldLeft, nOldTop, nOldLeft + nOldWidth, nOldTop + nOldHeight);
+
+                    if (nLOKWindowId == aOldTree.get<unsigned>("id", 0))
+                    {
+                        if (aNewRect == aOldRect)
+                        {
+                            SAL_INFO("lok.dialog", "Duplicate rect [" << aNewRect.toString()
+                                                                      << "]. Skipping new.");
+                            // We have a rectangle in the queue already that makes the current Callback useless.
+                            currentIsRedundant = true;
+                            return false;
+                        }
+                        // new one engulfs the old one?
+                        else if (aNewRect.Contains(aOldRect))
+                        {
+                            SAL_INFO("lok.dialog",
+                                     "New rect [" << aNewRect.toString() << "] engulfs old ["
+                                                  << aOldRect.toString() << "]. Replacing old.");
+                            return true;
+                        }
+                        // old one engulfs the new one?
+                        else if (aOldRect.Contains(aNewRect))
+                        {
+                            SAL_INFO("lok.dialog",
+                                     "Old rect [" << aOldRect.toString() << "] engulfs new ["
+                                                  << aNewRect.toString() << "]. Skipping new.");
+                            // We have a rectangle in the queue already that makes the current Callback useless.
+                            currentIsRedundant = true;
+                            return false;
+                        }
+                        else
+                        {
+                            // Overlapping rects.
+                            const tools::Rectangle aPreMergeRect = aNewRect;
+                            aNewRect.Union(aOldRect);
+                            SAL_INFO("lok.dialog", "Merging rects ["
+                                                       << aPreMergeRect.toString() << "] & ["
+                                                       << aOldRect.toString() << "] = ["
+                                                       << aNewRect.toString()
+                                                       << "]. Replacing old.");
+                            return true;
+                        }
+                    }
+                }
+
+                // keep rest
+                return false;
+            });
+
+            // Do not enqueue if redundant.
+            if (currentIsRedundant)
+                return true;
+
+            aTree.put("rectangle", aNewRect.toString().getStr());
+            aCallbackData.setJson(aTree);
+            assert(aCallbackData.validate() && "Validation after setJson failed!");
+        }
+    }
+    else if (aAction == "created")
+    {
+        // Remove all previous actions on same dialog, if we are creating it anew.
+        removeAll(LOK_CALLBACK_WINDOW,[&nLOKWindowId](const CallbackData& elemData) {
+            const boost::property_tree::ptree& aOldTree = elemData.getJson();
+            if (nLOKWindowId == aOldTree.get<unsigned>("id", 0))
+                return true;
+            return false;
+        });
+
+        VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
+        if (!pWindow)
+        {
+            gImpl->maLastExceptionMsg = "Document doesn't support dialog rendering, or window not found.";
+            return false;
+        }
+
+#ifndef IOS
+        auto xClip = forceSetClipboardForCurrentView(m_pDocument);
+
+        uno::Reference<datatransfer::clipboard::XClipboard> xClipboard(xClip);
+        pWindow->SetClipboard(xClipboard);
+#endif
+    }
+    else if (aAction == "size_changed")
+    {
+        // A size change is practically re-creation of the window.
+        // But at a minimum it's a full invalidation.
+        removeAll(LOK_CALLBACK_WINDOW, [&nLOKWindowId](const CallbackData& elemData) {
+            const boost::property_tree::ptree& aOldTree = elemData.getJson();
+            if (nLOKWindowId == aOldTree.get<unsigned>("id", 0))
+            {
+                const std::string aOldAction = aOldTree.get<std::string>("action", "");
+                if (aOldAction == "invalidate")
+                    return true;
+            }
+            return false;
+        });
+    }
+
+    // Queue this one.
+    return false;
+}
+
+void CallbackFlushHandler::enqueueUpdatedTypes()
+{
+    if( m_updatedTypes.empty() && m_updatedTypesPerViewId.empty())
+        return;
+    assert(m_viewId >= 0);
+    SfxViewShell* viewShell = SfxViewShell::GetFirst( false,
+        [this](const SfxViewShell* shell) { return shell->GetViewShellId().get() == m_viewId; } );
+    assert(viewShell != nullptr);
+
+    // First move data to local structures, so that callbacks don't possibly modify it.
+    std::vector<bool> updatedTypes;
+    std::swap(updatedTypes, m_updatedTypes);
+    boost::container::flat_map<int, std::vector<PerViewIdData>> updatedTypesPerViewId;
+    std::swap(updatedTypesPerViewId, m_updatedTypesPerViewId);
+
+    // Some types must always precede other types, for example
+    // LOK_CALLBACK_TEXT_SELECTION_START and LOK_CALLBACK_TEXT_SELECTION_END
+    // must always precede LOK_CALLBACK_TEXT_SELECTION if present.
+    // Only these types should be present (see isUpdatedType()) and should be processed in this order.
+    static const int orderedUpdatedTypes[] = {
+        LOK_CALLBACK_TEXT_SELECTION_START, LOK_CALLBACK_TEXT_SELECTION_END, LOK_CALLBACK_TEXT_SELECTION };
+    // Only these types should be present (see isUpdatedTypePerViewId()) and (as of now)
+    // the order doesn't matter.
+    static const int orderedUpdatedTypesPerViewId[] = {
+        LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR,
+        LOK_CALLBACK_INVALIDATE_VIEW_CURSOR,
+        LOK_CALLBACK_TEXT_VIEW_SELECTION };
+
+    for( int type : orderedUpdatedTypes )
+    {
+        if(o3tl::make_unsigned( type ) < updatedTypes.size() && updatedTypes[ type ])
+        {
+            enqueueUpdatedType( type, viewShell, m_viewId );
+        }
+    }
+    for( const auto& it : updatedTypesPerViewId )
+    {
+        int viewId = it.first;
+        const std::vector<PerViewIdData>& types = it.second;
+        for( int type : orderedUpdatedTypesPerViewId )
+        {
+            if(o3tl::make_unsigned( type ) < types.size() && types[ type ].set)
+            {
+                SfxViewShell* sourceViewShell = viewShell;
+                const int sourceViewId = types[ type ].sourceViewId;
+                if( sourceViewId != m_viewId )
+                {
+                    assert(sourceViewId >= 0);
+                    sourceViewShell = SfxViewShell::GetFirst( false,
+                    [sourceViewId](const SfxViewShell* shell) { return shell->GetViewShellId().get() == sourceViewId; } );
+                }
+                if(sourceViewShell == nullptr)
+                {
+                    SAL_INFO("lok", "View #" << sourceViewId << " no longer found for updated event [" << type << "]");
+                    continue; // View removed, probably cleaning up.
+                }
+                enqueueUpdatedType( type, sourceViewShell, viewId );
+            }
+        }
+    }
+}
+
+void CallbackFlushHandler::enqueueUpdatedType( int type, const SfxViewShell* viewShell, int viewId )
+{
+    bool ignore = false;
+    OString payload = viewShell->getLOKPayload( type, viewId, &ignore );
+    if(ignore)
+        return; // No actual payload to send.
+    CallbackData callbackData(payload.getStr(), viewId);
+    m_queue1.emplace_back(type);
+    m_queue2.emplace_back(callbackData);
+    SAL_INFO("lok", "Queued updated [" << type << "]: [" << callbackData.getPayload()
+        << "] to have " << m_queue1.size() << " entries.");
+}
+
+void CallbackFlushHandler::Invoke()
+{
+    comphelper::ProfileZone aZone("CallbackFlushHandler::Invoke");
+
+    if (!m_pCallback)
+        return;
+
+    // Get any pending invalidate tile events. This will call our callbacks,
+    // so it must be done before taking the mutex.
+    assert(m_viewId >= 0);
+    if(SfxViewShell* viewShell = SfxViewShell::GetFirst( false,
+        [this](const SfxViewShell* shell) { return shell->GetViewShellId().get() == m_viewId; } ))
+    {
+        viewShell->flushPendingLOKInvalidateTiles();
+    }
+
+    std::unique_lock<std::recursive_mutex> lock(m_mutex);
+
+    // Append messages for updated types, fetch them only now.
+    enqueueUpdatedTypes();
+
+    SAL_INFO("lok", "Flushing " << m_queue1.size() << " elements.");
+    auto it1 = m_queue1.begin();
+    auto it2 = m_queue2.begin();
+    for (; it1 != m_queue1.end(); ++it1, ++it2)
+    {
+        const int type = *it1;
+        const auto& payload = it2->getPayload();
+        const int viewId = lcl_isViewCallbackType(type) ? it2->getViewId() : -1;
+
+        SAL_INFO("lok", "processing event: [" << type << ',' << viewId << "]: [" << payload << "].");
+
+        // common code-path for events on this view:
+        if (viewId == -1)
+        {
+            size_t idx;
+            // key-value pairs
+            if (type == LOK_CALLBACK_STATE_CHANGED &&
+                (idx = payload.find('=')) != std::string::npos)
+            {
+                std::string key = payload.substr(0, idx);
+                std::string value = payload.substr(idx+1);
+                const auto stateIt = m_lastStateChange.find(key);
+                if (stateIt != m_lastStateChange.end())
+                {
+                    // If the value didn't change, it's safe to ignore.
+                    if (stateIt->second == value)
+                    {
+                        SAL_INFO("lok", "Skipping new state duplicate: [" << type << "]: [" << payload << "].");
+                        continue;
+                    }
+                    SAL_INFO("lok", "Replacing a state element [" << type << "]: [" << payload << "].");
+                    stateIt->second = value;
+                }
+                else
+                {
+                    SAL_INFO("lok", "Inserted a new state element: [" << type << "]: [" << payload << "]");
+                    m_lastStateChange.emplace(key, value);
+                }
+            }
+            else
+            {
+                const auto stateIt = m_states.find(type);
+                if (stateIt != m_states.end())
+                {
+                    // If the state didn't change, it's safe to ignore.
+                    if (stateIt->second == payload)
+                    {
+                        SAL_INFO("lok", "Skipping duplicate [" << type << "]: [" << payload << "].");
+                        continue;
+                    }
+                    stateIt->second = payload;
+                }
+            }
+        }
+        else // less common path for events relating to other views
+        {
+            const auto statesIt = m_viewStates.find(viewId);
+            if (statesIt != m_viewStates.end())
+            {
+                auto& states = statesIt->second;
+                const auto stateIt = states.find(type);
+                if (stateIt != states.end())
+                {
+                    // If the state didn't change, it's safe to ignore.
+                    if (stateIt->second == payload)
+                    {
+                        SAL_INFO("lok", "Skipping view duplicate [" << type << ',' << viewId << "]: [" << payload << "].");
+                        continue;
+                    }
+
+                    SAL_INFO("lok", "Replacing an element in view states [" << type << ',' << viewId << "]: [" << payload << "].");
+                    stateIt->second = payload;
+                }
+                else
+                {
+                    SAL_INFO("lok", "Inserted a new element in view states: [" << type << ',' << viewId << "]: [" << payload << "]");
+                    states.emplace(type, payload);
+
+                }
+            }
+        }
+
+        m_pCallback(type, payload.c_str(), m_pData);
+    }
+
+    m_queue1.clear();
+    m_queue2.clear();
+    Stop();
+    m_TimeoutIdle.Stop();
+}
+
+void CallbackFlushHandler::startTimer()
+{
+    if (!IsActive())
+        Start();
+    if (!m_TimeoutIdle.IsActive())
+        m_TimeoutIdle.Start();
+}
+
+bool CallbackFlushHandler::removeAll(int type)
+{
+    bool bErased = false;
+    auto it1 = m_queue1.begin();
+    for(;;)
+    {
+        it1 = std::find(it1, m_queue1.end(), type);
+        if(it1 == m_queue1.end())
+            break;
+        m_queue2.erase(toQueue2(it1));
+        it1 = m_queue1.erase(it1);
+        bErased = true;
+    }
+    return bErased;
+}
+
+bool CallbackFlushHandler::removeAll(int type, const std::function<bool (const CallbackData&)>& rTestFunc)
+{
+    bool bErased = false;
+    auto it1 = m_queue1.begin();
+    for(;;)
+    {
+        it1 = std::find(it1, m_queue1.end(), type);
+        if(it1 == m_queue1.end())
+            break;
+        auto it2 = toQueue2(it1);
+        if (rTestFunc(*it2))
+        {
+            m_queue2.erase(it2);
+            it1 = m_queue1.erase(it1);
+            bErased = true;
+        }
+        else
+            ++it1;
+    }
+    return bErased;
+}
+
+void CallbackFlushHandler::addViewStates(int viewId)
+{
+    const auto& result = m_viewStates.emplace(viewId, decltype(m_viewStates)::mapped_type());
+    if (!result.second && result.first != m_viewStates.end())
+    {
+        result.first->second.clear();
+    }
+}
+
+void CallbackFlushHandler::removeViewStates(int viewId)
+{
+    m_viewStates.erase(viewId);
+}
+
+
+static void doc_destroy(LibreOfficeKitDocument *pThis)
+{
+    comphelper::ProfileZone aZone("doc_destroy");
+
+    SolarMutexGuard aGuard;
+
+#ifndef IOS
+    LOKClipboardFactory::releaseClipboardForView(-1);
+#endif
+
+    LibLODocument_Impl *pDocument = static_cast<LibLODocument_Impl*>(pThis);
+    delete pDocument;
+}
+
+static void                    lo_destroy       (LibreOfficeKit* pThis);
+static int                     lo_initialize    (LibreOfficeKit* pThis, const char* pInstallPath, const char* pUserProfilePath);
+static LibreOfficeKitDocument* lo_documentLoad  (LibreOfficeKit* pThis, const char* pURL);
+static char *                  lo_getError      (LibreOfficeKit* pThis);
+static void                    lo_freeError     (char* pFree);
+static LibreOfficeKitDocument* lo_documentLoadWithOptions  (LibreOfficeKit* pThis,
+                                                           const char* pURL,
+                                                           const char* pOptions);
+static void                    lo_registerCallback (LibreOfficeKit* pThis,
+                                                    LibreOfficeKitCallback pCallback,
+                                                    void* pData);
+static char* lo_getFilterTypes(LibreOfficeKit* pThis);
+static void                    lo_setOptionalFeatures(LibreOfficeKit* pThis, unsigned long long features);
+static void                    lo_setDocumentPassword(LibreOfficeKit* pThis,
+                                                       const char* pURL,
+                                                       const char* pPassword);
+static char*                   lo_getVersionInfo(LibreOfficeKit* pThis);
+static int                     lo_runMacro      (LibreOfficeKit* pThis, const char* pURL);
+
+static bool lo_signDocument(LibreOfficeKit* pThis,
+                                   const char* pUrl,
+                                   const unsigned char* pCertificateBinary,
+                                   const int nCertificateBinarySize,
+                                   const unsigned char* pPrivateKeyBinary,
+                                   const int nPrivateKeyBinarySize);
+
+static void lo_runLoop(LibreOfficeKit* pThis,
+                       LibreOfficeKitPollCallback pPollCallback,
+                       LibreOfficeKitWakeCallback pWakeCallback,
+                       void* pData);
+
+static void lo_sendDialogEvent(LibreOfficeKit* pThis,
+                               unsigned long long int nLOKWindowId,
+                               const char* pArguments);
+
+static void lo_setOption(LibreOfficeKit* pThis, const char* pOption, const char* pValue);
+
+LibLibreOffice_Impl::LibLibreOffice_Impl()
+    : m_pOfficeClass( gOfficeClass.lock() )
+    , maThread(nullptr)
+    , mpCallback(nullptr)
+    , mpCallbackData(nullptr)
+    , mOptionalFeatures(0)
+{
+    if(!m_pOfficeClass) {
+        m_pOfficeClass = std::make_shared<LibreOfficeKitClass>();
+        m_pOfficeClass->nSize = sizeof(LibreOfficeKitClass);
+
+        m_pOfficeClass->destroy = lo_destroy;
+        m_pOfficeClass->documentLoad = lo_documentLoad;
+        m_pOfficeClass->getError = lo_getError;
+        m_pOfficeClass->freeError = lo_freeError;
+        m_pOfficeClass->documentLoadWithOptions = lo_documentLoadWithOptions;
+        m_pOfficeClass->registerCallback = lo_registerCallback;
+        m_pOfficeClass->getFilterTypes = lo_getFilterTypes;
+        m_pOfficeClass->setOptionalFeatures = lo_setOptionalFeatures;
+        m_pOfficeClass->setDocumentPassword = lo_setDocumentPassword;
+        m_pOfficeClass->getVersionInfo = lo_getVersionInfo;
+        m_pOfficeClass->runMacro = lo_runMacro;
+        m_pOfficeClass->signDocument = lo_signDocument;
+        m_pOfficeClass->runLoop = lo_runLoop;
+        m_pOfficeClass->sendDialogEvent = lo_sendDialogEvent;
+        m_pOfficeClass->setOption = lo_setOption;
+
+        gOfficeClass = m_pOfficeClass;
+    }
+
+    pClass = m_pOfficeClass.get();
+}
+
+LibLibreOffice_Impl::~LibLibreOffice_Impl()
+{
+}
+
+namespace
+{
+
+#ifdef IOS
+void paintTileToCGContext(ITiledRenderable* pDocument,
+                          void* rCGContext, const Size nCanvasSize,
+                          const int nTilePosX, const int nTilePosY,
+                          const int nTileWidth, const int nTileHeight)
+{
+    SystemGraphicsData aData;
+    aData.rCGContext = reinterpret_cast<CGContextRef>(rCGContext);
+
+    ScopedVclPtrInstance<VirtualDevice> pDevice(aData, Size(1, 1), DeviceFormat::DEFAULT);
+    pDevice->SetBackground(Wallpaper(COL_TRANSPARENT));
+    pDevice->SetOutputSizePixel(nCanvasSize);
+    pDocument->paintTile(*pDevice, nCanvasSize.Width(), nCanvasSize.Height(),
+                    nTilePosX, nTilePosY, nTileWidth, nTileHeight);
+}
+
+void paintTileIOS(LibreOfficeKitDocument* pThis,
+             unsigned char* pBuffer,
+             const int nCanvasWidth, const int nCanvasHeight, const double fDPIScale,
+             const int nTilePosX, const int nTilePosY,
+             const int nTileWidth, const int nTileHeight)
+{
+    CGContextRef pCGContext = CGBitmapContextCreate(pBuffer, nCanvasWidth, nCanvasHeight, 8,
+                                                    nCanvasWidth * 4, CGColorSpaceCreateDeviceRGB(),
+                                                    kCGImageAlphaPremultipliedFirst | kCGImageByteOrder32Little);
+
+    CGContextTranslateCTM(pCGContext, 0, nCanvasHeight);
+    CGContextScaleCTM(pCGContext, fDPIScale, -fDPIScale);
+
+    doc_paintTileToCGContext(pThis, (void*) pCGContext, nCanvasWidth, nCanvasHeight, nTilePosX, nTilePosY, nTileWidth, nTileHeight);
+
+    CGContextRelease(pCGContext);
+}
+#endif
+
+void setLanguageAndLocale(OUString const & aLangISO)
+{
+    SvtSysLocaleOptions aLocalOptions;
+    aLocalOptions.SetLocaleConfigString(aLangISO);
+    aLocalOptions.SetUILocaleConfigString(aLangISO);
+    aLocalOptions.Commit();
+}
+
+void setFormatSpecificFilterData(std::u16string_view sFormat, comphelper::SequenceAsHashMap & rFilterDataMap)
+{
+    if (sFormat == u"pdf")
+    {
+        // always export bookmarks, which is needed for annotations
+        rFilterDataMap["ExportBookmarks"] <<= true;
+    }
+}
+
+} // anonymous namespace
+
+// Wonder global state ...
+static uno::Reference<css::uno::XComponentContext> xContext;
+static uno::Reference<css::lang::XMultiServiceFactory> xSFactory;
+static uno::Reference<css::lang::XMultiComponentFactory> xFactory;
+
+static LibreOfficeKitDocument* lo_documentLoad(LibreOfficeKit* pThis, const char* pURL)
+{
+    return lo_documentLoadWithOptions(pThis, pURL, nullptr);
+}
+
+static LibreOfficeKitDocument* lo_documentLoadWithOptions(LibreOfficeKit* pThis, const char* pURL, const char* pOptions)
+{
+    comphelper::ProfileZone aZone("lo_documentLoadWithOptions");
+
+    SolarMutexGuard aGuard;
+
+    static int nDocumentIdCounter = 0;
+
+    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);
+    pLib->maLastExceptionMsg.clear();
+
+    const OUString aURL(getAbsoluteURL(pURL));
+    if (aURL.isEmpty())
+    {
+        pLib->maLastExceptionMsg = "Filename to load was not provided.";
+        SAL_INFO("lok", "URL for load is empty");
+        return nullptr;
+    }
+
+    pLib->maLastExceptionMsg.clear();
+
+    if (!xContext.is())
+    {
+        pLib->maLastExceptionMsg = "ComponentContext is not available";
+        SAL_INFO("lok", "ComponentContext is not available");
+        return nullptr;
+    }
+
+    uno::Reference<frame::XDesktop2> xComponentLoader = frame::Desktop::create(xContext);
+
+    if (!xComponentLoader.is())
+    {
+        pLib->maLastExceptionMsg = "ComponentLoader is not available";
+        SAL_INFO("lok", "ComponentLoader is not available");
+        return nullptr;
+    }
+
+    try
+    {
+        // 'Language=...' is an option that LOK consumes by itself, and does
+        // not pass it as a parameter to the filter
+        OUString aOptions = getUString(pOptions);
+        const OUString aLanguage = extractParameter(aOptions, u"Language");
+        bool isValidLangTag = LanguageTag::isValidBcp47(aLanguage, nullptr);
+
+        if (!aLanguage.isEmpty() && isValidLangTag)
+        {
+            SfxLokHelper::setDefaultLanguage(aLanguage);
+            // Set the LOK language tag, used for dialog tunneling.
+            comphelper::LibreOfficeKit::setLanguageTag(LanguageTag(aLanguage));
+            comphelper::LibreOfficeKit::setLocale(LanguageTag(aLanguage));
+
+            SAL_INFO("lok", "Set document language to " << aLanguage);
+            // use with care - it sets it for the entire core, not just the
+            // document
+            setLanguageAndLocale(aLanguage);
+            // Need to reset the static initialized values
+            SvNumberFormatter::resetTheCurrencyTable();
+        }
+
+        const OUString aDeviceFormFactor = extractParameter(aOptions, u"DeviceFormFactor");
+        SfxLokHelper::setDeviceFormFactor(aDeviceFormFactor);
+
+        const OUString aBatch = extractParameter(aOptions, u"Batch");
+        if (!aBatch.isEmpty())
+        {
+             Application::SetDialogCancelMode(DialogCancelMode::LOKSilent);
+        }
+
+        const OUString sFilterOptions = aOptions;
+
+        rtl::Reference<LOKInteractionHandler> const pInteraction(
+            new LOKInteractionHandler("load", pLib));
+        auto const pair(pLib->mInteractionMap.insert(std::make_pair(aURL.toUtf8(), pInteraction)));
+        comphelper::ScopeGuard const g([&] () {
+                if (pair.second)
+                {
+                    pLib->mInteractionMap.erase(aURL.toUtf8());
+                }
+            });
+        uno::Reference<task::XInteractionHandler2> const xInteraction(pInteraction);
+
+        int nMacroSecurityLevel = 1;
+        const OUString aMacroSecurityLevel = extractParameter(aOptions, u"MacroSecurityLevel");
+        if (!aMacroSecurityLevel.isEmpty())
+        {
+            double nNumber;
+            sal_uInt32 nFormat = 1;
+            SvNumberFormatter aFormatter(::comphelper::getProcessComponentContext(), LANGUAGE_ENGLISH_US);
+            if (aFormatter.IsNumberFormat(aMacroSecurityLevel, nFormat, nNumber))
+                nMacroSecurityLevel = static_cast<int>(nNumber);
+        }
+        SvtSecurityOptions::SetMacroSecurityLevel(nMacroSecurityLevel);
+
+#if defined(ANDROID) && HAVE_FEATURE_ANDROID_LOK
+        sal_Int16 nMacroExecMode = document::MacroExecMode::USE_CONFIG;
+#else
+        const OUString aEnableMacrosExecution = extractParameter(aOptions, u"EnableMacrosExecution");
+        sal_Int16 nMacroExecMode = aEnableMacrosExecution == "true" ? document::MacroExecMode::USE_CONFIG :
+            document::MacroExecMode::NEVER_EXECUTE;
+#endif
+
+        uno::Sequence<css::beans::PropertyValue> aFilterOptions{
+            comphelper::makePropertyValue("FilterOptions", sFilterOptions),
+            comphelper::makePropertyValue("InteractionHandler", xInteraction),
+            comphelper::makePropertyValue("MacroExecutionMode", nMacroExecMode)
+        };
+
+        /* TODO
+        sal_Int16 nUpdateDoc = document::UpdateDocMode::ACCORDING_TO_CONFIG;
+        aFilterOptions[3].Name = "UpdateDocMode";
+        aFilterOptions[3].Value <<= nUpdateDoc;
+        */
+
+        const int nThisDocumentId = nDocumentIdCounter++;
+        SfxViewShell::SetCurrentDocId(ViewShellDocId(nThisDocumentId));
+        uno::Reference<lang::XComponent> xComponent = xComponentLoader->loadComponentFromURL(
+                                            aURL, "_blank", 0,
+                                            aFilterOptions);
+
+        assert(!xComponent.is() || pair.second); // concurrent loading of same URL ought to fail
+
+        if (!xComponent.is())
+        {
+            pLib->maLastExceptionMsg = "loadComponentFromURL returned an empty reference";
+            SAL_INFO("lok", "Document can't be loaded - " << pLib->maLastExceptionMsg);
+            return nullptr;
+        }
+
+        LibLODocument_Impl* pDocument = new LibLODocument_Impl(xComponent, nThisDocumentId);
+
+        // After loading the document, its initial view is the "current" view.
+        if (pLib->mpCallback)
+        {
+            int nState = doc_getSignatureState(pDocument);
+            pLib->mpCallback(LOK_CALLBACK_SIGNATURE_STATUS, OString::number(nState).getStr(), pLib->mpCallbackData);
+        }
+        return pDocument;
+    }
+    catch (const uno::Exception& exception)
+    {
+        pLib->maLastExceptionMsg = exception.Message;
+        TOOLS_INFO_EXCEPTION("lok", "Document can't be loaded");
+    }
+
+    return nullptr;
+}
+
+static int lo_runMacro(LibreOfficeKit* pThis, const char *pURL)
+{
+    comphelper::ProfileZone aZone("lo_runMacro");
+
+    SolarMutexGuard aGuard;
+
+    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);
+    pLib->maLastExceptionMsg.clear();
+
+    OUString sURL( pURL, strlen(pURL), RTL_TEXTENCODING_UTF8 );
+    if (sURL.isEmpty())
+    {
+        pLib->maLastExceptionMsg = "Macro to run was not provided.";
+        SAL_INFO("lok", "Macro URL is empty");
+        return false;
+    }
+
+    if (!sURL.startsWith("macro://"))
+    {
+        pLib->maLastExceptionMsg = "This doesn't look like macro URL";
+        SAL_INFO("lok", "Macro URL is invalid");
+        return false;
+    }
+
+    pLib->maLastExceptionMsg.clear();
+
+    if (!xContext.is())
+    {
+        pLib->maLastExceptionMsg = "ComponentContext is not available";
+        SAL_INFO("lok", "ComponentContext is not available");
+        return false;
+    }
+
+    util::URL aURL;
+    aURL.Complete = sURL;
+
+    uno::Reference < util::XURLTransformer > xParser( util::URLTransformer::create( xContext ) );
+
+    if( xParser.is() )
+        xParser->parseStrict( aURL );
+
+    uno::Reference<frame::XDesktop2> xComponentLoader = frame::Desktop::create(xContext);
+
+    if (!xComponentLoader.is())
+    {
+        pLib->maLastExceptionMsg = "ComponentLoader is not available";
+        SAL_INFO("lok", "ComponentLoader is not available");
+        return false;
+    }
+
+    xFactory = xContext->getServiceManager();
+
+    if (!xFactory)
+        return false;
+
+    uno::Reference<frame::XDispatchProvider> xDP;
+    xSFactory.set(xFactory, uno::UNO_QUERY_THROW);
+    xDP.set( xSFactory->createInstance("com.sun.star.comp.sfx2.SfxMacroLoader"), uno::UNO_QUERY );
+    uno::Reference<frame::XDispatch> xD = xDP->queryDispatch( aURL, OUString(), 0);
+
+    if (!xD.is())
+    {
+        pLib->maLastExceptionMsg = "Macro loader is not available";
+        SAL_INFO("lok", "Macro loader is not available");
+        return false;
+    }
+
+    uno::Reference < frame::XSynchronousDispatch > xSyncDisp( xD, uno::UNO_QUERY_THROW );
+    uno::Sequence<css::beans::PropertyValue> aEmpty;
+    css::beans::PropertyValue aErr;
+    uno::Any aRet = xSyncDisp->dispatchWithReturnValue( aURL, aEmpty );
+    aRet >>= aErr;
+
+    if (aErr.Name == "ErrorCode")
+    {
+        sal_uInt32 nErrCode = 0; // ERRCODE_NONE
+        aErr.Value >>= nErrCode;
+
+        pLib->maLastExceptionMsg = "An error occurred running macro (error code: " + OUString::number( nErrCode ) + ")";
+        SAL_INFO("lok", "Macro execution terminated with error code " << nErrCode);
+
+        return false;
+    }
+
+    return true;
+}
+
+static bool lo_signDocument(LibreOfficeKit* /*pThis*/,
+                            const char* pURL,
+                            const unsigned char* pCertificateBinary,
+                            const int nCertificateBinarySize,
+                            const unsigned char* pPrivateKeyBinary,
+                            const int nPrivateKeyBinarySize)
+{
+    comphelper::ProfileZone aZone("lo_signDocument");
+
+    OUString aURL(getAbsoluteURL(pURL));
+    if (aURL.isEmpty())
+       return false;
+
+    if (!xContext.is())
+        return false;
+
+    uno::Sequence<sal_Int8> aCertificateSequence;
+
+    std::string aCertificateString(reinterpret_cast<const char*>(pCertificateBinary), nCertificateBinarySize);
+    std::string aCertificateBase64String = extractCertificate(aCertificateString);
+    if (!aCertificateBase64String.empty())
+    {
+        OUString aBase64OUString = OUString::createFromAscii(aCertificateBase64String.c_str());
+        comphelper::Base64::decode(aCertificateSequence, aBase64OUString);
+    }
+    else
+    {
+        aCertificateSequence.realloc(nCertificateBinarySize);
+        std::copy(pCertificateBinary, pCertificateBinary + nCertificateBinarySize, aCertificateSequence.getArray());
+    }
+
+    uno::Sequence<sal_Int8> aPrivateKeySequence;
+    std::string aPrivateKeyString(reinterpret_cast<const char*>(pPrivateKeyBinary), nPrivateKeyBinarySize);
+    std::string aPrivateKeyBase64String = extractPrivateKey(aPrivateKeyString);
+    if (!aPrivateKeyBase64String.empty())
+    {
+        OUString aBase64OUString = OUString::createFromAscii(aPrivateKeyBase64String.c_str());
+        comphelper::Base64::decode(aPrivateKeySequence, aBase64OUString);
+    }
+    else
+    {
+        aPrivateKeySequence.realloc(nPrivateKeyBinarySize);
+        std::copy(pPrivateKeyBinary, pPrivateKeyBinary + nPrivateKeyBinarySize, aPrivateKeySequence.getArray());
+    }
+
+    uno::Reference<xml::crypto::XSEInitializer> xSEInitializer = xml::crypto::SEInitializer::create(xContext);
+    uno::Reference<xml::crypto::XXMLSecurityContext> xSecurityContext = xSEInitializer->createSecurityContext(OUString());
+    if (!xSecurityContext.is())
+        return false;
+
+    uno::Reference<xml::crypto::XSecurityEnvironment> xSecurityEnvironment = xSecurityContext->getSecurityEnvironment();
+    uno::Reference<xml::crypto::XCertificateCreator> xCertificateCreator(xSecurityEnvironment, uno::UNO_QUERY);
+
+    if (!xCertificateCreator.is())
+        return false;
+
+    uno::Reference<security::XCertificate> xCertificate = xCertificateCreator->createDERCertificateWithPrivateKey(aCertificateSequence, aPrivateKeySequence);
+
+    if (!xCertificate.is())
+        return false;
+
+    sfx2::DocumentSigner aDocumentSigner(aURL);
+    if (!aDocumentSigner.signDocument(xCertificate))
+        return false;
+
+    return true;
+}
+
+static void lo_registerCallback (LibreOfficeKit* pThis,
+                                 LibreOfficeKitCallback pCallback,
+                                 void* pData)
+{
+    SolarMutexGuard aGuard;
+
+    Application* pApp = GetpApp();
+    assert(pApp);
+
+    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);
+    pLib->maLastExceptionMsg.clear();
+
+    pApp->m_pCallback = pLib->mpCallback = pCallback;
+    pApp->m_pCallbackData = pLib->mpCallbackData = pData;
+}
+
+static int doc_saveAs(LibreOfficeKitDocument* pThis, const char* sUrl, const char* pFormat, const char* pFilterOptions)
+{
+    comphelper::ProfileZone aZone("doc_saveAs");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    OUString sFormat = getUString(pFormat);
+    OUString aURL(getAbsoluteURL(sUrl));
+
+    uno::Reference<frame::XStorable> xStorable(pDocument->mxComponent, uno::UNO_QUERY_THROW);
+
+    if (aURL.isEmpty())
+    {
+        SetLastExceptionMsg("Filename to save to was not provided.");
+        SAL_INFO("lok", "URL for save is empty");
+        return false;
+    }
+
+    try
+    {
+        const ExtensionMap* pMap;
+
+        switch (doc_getDocumentType(pThis))
+        {
+        case LOK_DOCTYPE_SPREADSHEET:
+            pMap = aCalcExtensionMap;
+            break;
+        case LOK_DOCTYPE_PRESENTATION:
+            pMap = aImpressExtensionMap;
+            break;
+        case LOK_DOCTYPE_DRAWING:
+            pMap = aDrawExtensionMap;
+            break;
+        case LOK_DOCTYPE_TEXT:
+            pMap = aWriterExtensionMap;
+            break;
+        case LOK_DOCTYPE_OTHER:
+        default:
+            SAL_INFO("lok", "Can't save document - unsupported document type.");
+            return false;
+        }
+
+        if (pFormat == nullptr)
+        {
+            // sniff from the extension
+            sal_Int32 idx = aURL.lastIndexOf(".");
+            if( idx > 0 )
+            {
+                sFormat = aURL.copy( idx + 1 );
+            }
+            else
+            {
+                SetLastExceptionMsg("input filename without a suffix");
+                return false;
+            }
+        }
+
+        OUString aFilterName;
+        for (sal_Int32 i = 0; pMap[i].extn; ++i)
+        {
+            if (sFormat.equalsIgnoreAsciiCaseAscii(pMap[i].extn))
+            {
+                aFilterName = getUString(pMap[i].filterName);
+                break;
+            }
+        }
+        if (aFilterName.isEmpty())
+        {
+            SetLastExceptionMsg("no output filter found for provided suffix");
+            return false;
+        }
+
+        OUString aFilterOptions = getUString(pFilterOptions);
+
+        // Check if watermark for pdf is passed by filteroptions...
+        // It is not a real filter option so it must be filtered out.
+        OUString watermarkText;
+        std::u16string_view sFullSheetPreview;
+        int aIndex = -1;
+        if ((aIndex = aFilterOptions.indexOf(",Watermark=")) >= 0)
+        {
+            int bIndex = aFilterOptions.indexOf("WATERMARKEND");
+            watermarkText = aFilterOptions.subView(aIndex+11, bIndex-(aIndex+11));
+            aFilterOptions = OUString::Concat(aFilterOptions.subView(0, aIndex)) + aFilterOptions.subView(bIndex+12);
+        }
+
+        if ((aIndex = aFilterOptions.indexOf(",FullSheetPreview=")) >= 0)
+        {
+            int bIndex = aFilterOptions.indexOf("FULLSHEETPREVEND");
+            sFullSheetPreview = aFilterOptions.subView(aIndex+18, bIndex-(aIndex+18));
+            aFilterOptions = OUString::Concat(aFilterOptions.subView(0, aIndex)) + aFilterOptions.subView(bIndex+16);
+        }
+
+        bool bFullSheetPreview = sFullSheetPreview == u"true";
+
+        // Select a pdf version if specified a valid one. If not specified then ignore.
+        // If invalid then fail.
+        sal_Int32 pdfVer = 0;
+        if ((aIndex = aFilterOptions.indexOf(",PDFVer=")) >= 0)
+        {
+            int bIndex = aFilterOptions.indexOf("PDFVEREND");
+            std::u16string_view sPdfVer = aFilterOptions.subView(aIndex+8, bIndex-(aIndex+8));
+            aFilterOptions = OUString::Concat(aFilterOptions.subView(0, aIndex)) + aFilterOptions.subView(bIndex+9);
+
+            if (o3tl::equalsIgnoreAsciiCase(sPdfVer, u"PDF/A-1b"))
+                pdfVer = 1;
+            else if (o3tl::equalsIgnoreAsciiCase(sPdfVer, u"PDF/A-2b"))
+                pdfVer = 2;
+            else if (o3tl::equalsIgnoreAsciiCase(sPdfVer, u"PDF/A-3b"))
+                pdfVer = 3;
+            else if (o3tl::equalsIgnoreAsciiCase(sPdfVer, u"PDF-1.5"))
+                pdfVer = 15;
+            else if (o3tl::equalsIgnoreAsciiCase(sPdfVer, u"PDF-1.6"))
+                pdfVer = 16;
+            else
+            {
+                SetLastExceptionMsg("wrong PDF version");
+                return false;
+            }
+        }
+
+        // 'TakeOwnership' == this is a 'real' SaveAs (that is, the document
+        // gets a new name).  When this is not provided, the meaning of
+        // saveAs() is more like save-a-copy, which allows saving to any
+        // random format like PDF or PNG.
+        // It is not a real filter option, so we have to filter it out.
+        const uno::Sequence<OUString> aOptionSeq = comphelper::string::convertCommaSeparated(aFilterOptions);
+        std::vector<OUString> aFilteredOptionVec;
+        bool bTakeOwnership = false;
+        MediaDescriptor aSaveMediaDescriptor;
+        for (const auto& rOption : aOptionSeq)
+        {
+            if (rOption == "TakeOwnership")
+                bTakeOwnership = true;
+            else if (rOption == "NoFileSync")
+                aSaveMediaDescriptor["NoFileSync"] <<= true;
+            else
+                aFilteredOptionVec.push_back(rOption);
+        }
+
+        aSaveMediaDescriptor["Overwrite"] <<= true;
+        aSaveMediaDescriptor["FilterName"] <<= aFilterName;
+
+        auto aFilteredOptionSeq = comphelper::containerToSequence<OUString>(aFilteredOptionVec);
+        aFilterOptions = comphelper::string::convertCommaSeparated(aFilteredOptionSeq);
+        aSaveMediaDescriptor[MediaDescriptor::PROP_FILTEROPTIONS] <<= aFilterOptions;
+
+        comphelper::SequenceAsHashMap aFilterDataMap;
+
+        // If filter options is JSON string, then make sure aFilterDataMap stays empty, otherwise we
+        // would ignore the filter options.
+        if (!aFilterOptions.startsWith("{"))
+        {
+            setFormatSpecificFilterData(sFormat, aFilterDataMap);
+        }
+
+        if (!watermarkText.isEmpty())
+            aFilterDataMap["TiledWatermark"] <<= watermarkText;
+
+        if (bFullSheetPreview)
+            aFilterDataMap["SinglePageSheets"] <<= true;
+
+        if (pdfVer)
+            aFilterDataMap["SelectPdfVersion"] <<= pdfVer;
+
+        if (!aFilterDataMap.empty())
+        {
+            aSaveMediaDescriptor["FilterData"] <<= aFilterDataMap.getAsConstPropertyValueList();
+        }
+
+        // add interaction handler too
+        if (gImpl)
+        {
+            // gImpl does not have to exist when running from a unit test
+            rtl::Reference<LOKInteractionHandler> const pInteraction(
+                    new LOKInteractionHandler("saveas", gImpl, pDocument));
+            uno::Reference<task::XInteractionHandler2> const xInteraction(pInteraction);
+
+            aSaveMediaDescriptor[MediaDescriptor::PROP_INTERACTIONHANDLER] <<= xInteraction;
+        }
+
+
+        if (bTakeOwnership)
+            xStorable->storeAsURL(aURL, aSaveMediaDescriptor.getAsConstPropertyValueList());
+        else
+            xStorable->storeToURL(aURL, aSaveMediaDescriptor.getAsConstPropertyValueList());
+
+        return true;
+    }
+    catch (const uno::Exception& exception)
+    {
+        SetLastExceptionMsg("exception: " + exception.Message);
+    }
+    return false;
+}
+
+/**
+ * Initialize UNO commands, in the sense that from now on, the LOK client gets updates for status
+ * changes of these commands. This is necessary, because (unlike in the desktop case) there are no
+ * toolbars hosting widgets these UNO commands, so no such status updates would be sent to the
+ * headless LOK clients out of the box.
+ */
+static void doc_iniUnoCommands ()
+{
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    OUString sUnoCommands[] =
+    {
+        OUString(".uno:AlignLeft"),
+        OUString(".uno:AlignHorizontalCenter"),
+        OUString(".uno:AlignRight"),
+        OUString(".uno:BackColor"),
+        OUString(".uno:BackgroundColor"),
+        OUString(".uno:TableCellBackgroundColor"),
+        OUString(".uno:Bold"),
+        OUString(".uno:CenterPara"),
+        OUString(".uno:CharBackColor"),
+        OUString(".uno:CharBackgroundExt"),
+        OUString(".uno:CharFontName"),
+        OUString(".uno:Color"),
+        OUString(".uno:ControlCodes"),
+        OUString(".uno:DecrementIndent"),
+        OUString(".uno:DefaultBullet"),
+        OUString(".uno:DefaultNumbering"),
+        OUString(".uno:FontColor"),
+        OUString(".uno:FontHeight"),
+        OUString(".uno:IncrementIndent"),
+        OUString(".uno:Italic"),
+        OUString(".uno:JustifyPara"),
+        OUString(".uno:JumpToMark"),
+        OUString(".uno:OutlineFont"),
+        OUString(".uno:LeftPara"),
+        OUString(".uno:LanguageStatus"),
+        OUString(".uno:RightPara"),
+        OUString(".uno:Shadowed"),
+        OUString(".uno:SubScript"),
+        OUString(".uno:SuperScript"),
+        OUString(".uno:Strikeout"),
+        OUString(".uno:StyleApply"),
+        OUString(".uno:Underline"),
+        OUString(".uno:ModifiedStatus"),
+        OUString(".uno:Undo"),
+        OUString(".uno:Redo"),
+        OUString(".uno:InsertPage"),
+        OUString(".uno:DeletePage"),
+        OUString(".uno:DuplicatePage"),
+        OUString(".uno:InsertSlide"),
+        OUString(".uno:DeleteSlide"),
+        OUString(".uno:DuplicateSlide"),
+        OUString(".uno:Cut"),
+        OUString(".uno:Copy"),
+        OUString(".uno:Paste"),
+        OUString(".uno:SelectAll"),
+        OUString(".uno:ReplyComment"),
+        OUString(".uno:ResolveComment"),
+        OUString(".uno:ResolveCommentThread"),
+        OUString(".uno:InsertRowsBefore"),
+        OUString(".uno:InsertRowsAfter"),
+        OUString(".uno:InsertColumnsBefore"),
+        OUString(".uno:InsertColumnsAfter"),
+        OUString(".uno:DeleteRows"),
+        OUString(".uno:DeleteColumns"),
+        OUString(".uno:DeleteTable"),
+        OUString(".uno:SelectTable"),
+        OUString(".uno:EntireRow"),
+        OUString(".uno:EntireColumn"),
+        OUString(".uno:EntireCell"),
+        OUString(".uno:AssignLayout"),
+        OUString(".uno:StatusDocPos"),
+        OUString(".uno:RowColSelCount"),
+        OUString(".uno:StatusPageStyle"),
+        OUString(".uno:InsertMode"),
+        OUString(".uno:SpellOnline"),
+        OUString(".uno:StatusSelectionMode"),
+        OUString(".uno:StateTableCell"),
+        OUString(".uno:StatusBarFunc"),
+        OUString(".uno:StatePageNumber"),
+        OUString(".uno:StateWordCount"),
+        OUString(".uno:SelectionMode"),
+        OUString(".uno:PageStatus"),
+        OUString(".uno:LayoutStatus"),
+        OUString(".uno:Scale"),
+        OUString(".uno:Context"),
+        OUString(".uno:WrapText"),
+        OUString(".uno:ToggleMergeCells"),
+        OUString(".uno:NumberFormatCurrency"),
+        OUString(".uno:NumberFormatPercent"),
+        OUString(".uno:NumberFormatDecimal"),
+        OUString(".uno:NumberFormatDate"),
+        OUString(".uno:EditHeaderAndFooter"),
+        OUString(".uno:FrameLineColor"),
+        OUString(".uno:SortAscending"),
+        OUString(".uno:SortDescending"),
+        OUString(".uno:TrackChanges"),
+        OUString(".uno:ShowTrackedChanges"),
+        OUString(".uno:NextTrackedChange"),
+        OUString(".uno:PreviousTrackedChange"),
+        OUString(".uno:AcceptAllTrackedChanges"),
+        OUString(".uno:RejectAllTrackedChanges"),
+        OUString(".uno:TableDialog"),
+        OUString(".uno:FormatCellDialog"),
+        OUString(".uno:FontDialog"),
+        OUString(".uno:ParagraphDialog"),
+        OUString(".uno:OutlineBullet"),
+        OUString(".uno:InsertIndexesEntry"),
+        OUString(".uno:DocumentRepair"),
+        OUString(".uno:TransformDialog"),
+        OUString(".uno:InsertPageHeader"),
+        OUString(".uno:InsertPageFooter"),
+        OUString(".uno:OnlineAutoFormat"),
+        OUString(".uno:InsertObjectChart"),
+        OUString(".uno:InsertSection"),
+        OUString(".uno:InsertAnnotation"),
+        OUString(".uno:DeleteAnnotation"),
+        OUString(".uno:InsertPagebreak"),
+        OUString(".uno:InsertColumnBreak"),
+        OUString(".uno:HyperlinkDialog"),
+        OUString(".uno:InsertSymbol"),
+        OUString(".uno:EditRegion"),
+        OUString(".uno:ThesaurusDialog"),
+        OUString(".uno:FormatArea"),
+        OUString(".uno:FormatLine"),
+        OUString(".uno:FormatColumns"),
+        OUString(".uno:Watermark"),
+        OUString(".uno:ResetAttributes"),
+        OUString(".uno:Orientation"),
+        OUString(".uno:ObjectAlignLeft"),
+        OUString(".uno:ObjectAlignRight"),
+        OUString(".uno:AlignCenter"),
+        OUString(".uno:TransformPosX"),
+        OUString(".uno:TransformPosY"),
+        OUString(".uno:TransformWidth"),
+        OUString(".uno:TransformHeight"),
+        OUString(".uno:ObjectBackOne"),
+        OUString(".uno:SendToBack"),
+        OUString(".uno:ObjectForwardOne"),
+        OUString(".uno:BringToFront"),
+        OUString(".uno:WrapRight"),
+        OUString(".uno:WrapThrough"),
+        OUString(".uno:WrapLeft"),
+        OUString(".uno:WrapIdeal"),
+        OUString(".uno:WrapOn"),
+        OUString(".uno:WrapOff"),
+        OUString(".uno:UpdateCurIndex"),
+        OUString(".uno:InsertCaptionDialog"),
+        OUString(".uno:FormatGroup"),
+        OUString(".uno:SplitTable"),
+        OUString(".uno:SplitCell"),
+        OUString(".uno:MergeCells"),
+        OUString(".uno:DeleteNote"),
+        OUString(".uno:AcceptChanges"),
+        OUString(".uno:FormatPaintbrush"),
+        OUString(".uno:SetDefault"),
+        OUString(".uno:ParaLeftToRight"),
+        OUString(".uno:ParaRightToLeft"),
+        OUString(".uno:ParaspaceIncrease"),
+        OUString(".uno:ParaspaceDecrease"),
+        OUString(".uno:AcceptTrackedChange"),
+        OUString(".uno:RejectTrackedChange"),
+        OUString(".uno:ShowResolvedAnnotations"),
+        OUString(".uno:InsertBreak"),
+        OUString(".uno:InsertEndnote"),
+        OUString(".uno:InsertFootnote"),
+        OUString(".uno:InsertReferenceField"),
+        OUString(".uno:InsertBookmark"),
+        OUString(".uno:InsertAuthoritiesEntry"),
+        OUString(".uno:InsertMultiIndex"),
+        OUString(".uno:InsertField"),
+        OUString(".uno:InsertPageNumberField"),
+        OUString(".uno:InsertPageCountField"),
+        OUString(".uno:InsertDateField"),
+        OUString(".uno:InsertTitleField"),
+        OUString(".uno:InsertFieldCtrl"),
+        OUString(".uno:CharmapControl"),
+        OUString(".uno:EnterGroup"),
+        OUString(".uno:LeaveGroup"),
+        OUString(".uno:AlignUp"),
+        OUString(".uno:AlignMiddle"),
+        OUString(".uno:AlignDown"),
+        OUString(".uno:TraceChangeMode"),
+        OUString(".uno:Combine"),
+        OUString(".uno:Merge"),
+        OUString(".uno:Dismantle"),
+        OUString(".uno:Substract"),
+        OUString(".uno:DistributeSelection"),
+        OUString(".uno:Intersect"),
+        OUString(".uno:BorderInner"),
+        OUString(".uno:BorderOuter"),
+        OUString(".uno:FreezePanes"),
+        OUString(".uno:FreezePanesColumn"),
+        OUString(".uno:FreezePanesRow"),
+        OUString(".uno:Sidebar"),
+        OUString(".uno:SheetRightToLeft"),
+        OUString(".uno:RunMacro"),
+        OUString(".uno:SpacePara1"),
+        OUString(".uno:SpacePara15"),
+        OUString(".uno:SpacePara2"),
+        OUString(".uno:InsertSparkline"),
+        OUString(".uno:DeleteSparkline"),
+        OUString(".uno:DeleteSparklineGroup"),
+        OUString(".uno:EditSparklineGroup"),
+        OUString(".uno:EditSparkline"),
+        OUString(".uno:GroupSparklines"),
+        OUString(".uno:UngroupSparklines"),
+        OUString(".uno:FormatSparklineMenu"),
+    };
+
+    util::URL aCommandURL;
+    SfxViewShell* pViewShell = SfxViewShell::Current();
+    SfxViewFrame* pViewFrame = pViewShell? pViewShell->GetViewFrame(): nullptr;
+
+    // check if Frame-Controller were created.
+    if (!pViewFrame)
+    {
+        SAL_WARN("lok", "iniUnoCommands: No Frame-Controller created.");
+        return;
+    }
+
+    if (!xContext.is())
+        xContext = comphelper::getProcessComponentContext();
+    if (!xContext.is())
+    {
+        SAL_WARN("lok", "iniUnoCommands: Component context is not available");
+        return;
+    }
+
+    SfxSlotPool& rSlotPool = SfxSlotPool::GetSlotPool(pViewFrame);
+    uno::Reference<util::XURLTransformer> xParser(util::URLTransformer::create(xContext));
+
+    for (const auto & sUnoCommand : sUnoCommands)
+    {
+        aCommandURL.Complete = sUnoCommand;
+        xParser->parseStrict(aCommandURL);
+
+        // when null, this command is not supported by the given component
+        // (like eg. Calc does not have ".uno:DefaultBullet" etc.)
+        if (const SfxSlot* pSlot = rSlotPool.GetUnoSlot(aCommandURL.Path))
+        {
+            // Initialize slot to dispatch .uno: Command.
+            pViewFrame->GetBindings().GetDispatch(pSlot, aCommandURL, false);
+        }
+    }
+}
+
+static int doc_getDocumentType (LibreOfficeKitDocument* pThis)
+{
+    comphelper::ProfileZone aZone("doc_getDocumentType");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    try
+    {
+        uno::Reference<lang::XServiceInfo> xDocument(pDocument->mxComponent, uno::UNO_QUERY_THROW);
+
+        if (xDocument->supportsService("com.sun.star.sheet.SpreadsheetDocument"))
+        {
+            return LOK_DOCTYPE_SPREADSHEET;
+        }
+        else if (xDocument->supportsService("com.sun.star.presentation.PresentationDocument"))
+        {
+            return LOK_DOCTYPE_PRESENTATION;
+        }
+        else if (xDocument->supportsService("com.sun.star.drawing.DrawingDocument"))
+        {
+            return LOK_DOCTYPE_DRAWING;
+        }
+        else if (xDocument->supportsService("com.sun.star.text.TextDocument") || xDocument->supportsService("com.sun.star.text.WebDocument"))
+        {
+            return LOK_DOCTYPE_TEXT;
+        }
+        else
+        {
+            SetLastExceptionMsg("unknown document type");
+        }
+    }
+    catch (const uno::Exception& exception)
+    {
+        SetLastExceptionMsg("exception: " + exception.Message);
+    }
+    return LOK_DOCTYPE_OTHER;
+}
+
+static int doc_getParts (LibreOfficeKitDocument* pThis)
+{
+    comphelper::ProfileZone aZone("doc_getParts");
+
+    SolarMutexGuard aGuard;
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return 0;
+    }
+
+    return pDoc->getParts();
+}
+
+static int doc_getPart (LibreOfficeKitDocument* pThis)
+{
+    comphelper::ProfileZone aZone("doc_getPart");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return 0;
+    }
+
+    return pDoc->getPart();
+}
+
+static void doc_setPartImpl(LibreOfficeKitDocument* pThis, int nPart, bool bAllowChangeFocus = true)
+{
+    comphelper::ProfileZone aZone("doc_setPart");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+    pDoc->setPart( nPart, bAllowChangeFocus );
+}
+
+static void doc_setPart(LibreOfficeKitDocument* pThis, int nPart)
+{
+    doc_setPartImpl(pThis, nPart, true);
+}
+
+static char* doc_getPartInfo(LibreOfficeKitDocument* pThis, int nPart)
+{
+    comphelper::ProfileZone aZone("doc_getPartInfo");
+
+    SolarMutexGuard aGuard;
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return nullptr;
+    }
+
+    return convertOUString(pDoc->getPartInfo(nPart));
+}
+
+static void doc_selectPart(LibreOfficeKitDocument* pThis, int nPart, int nSelect)
+{
+    SolarMutexGuard aGuard;
+    if (gImpl)
+        gImpl->maLastExceptionMsg.clear();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
+        return;
+    }
+
+    pDoc->selectPart( nPart, nSelect );
+}
+
+static void doc_moveSelectedParts(LibreOfficeKitDocument* pThis, int nPosition, bool bDuplicate)
+{
+    SolarMutexGuard aGuard;
+    if (gImpl)
+        gImpl->maLastExceptionMsg.clear();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
+        return;
+    }
+
+    pDoc->moveSelectedParts(nPosition, bDuplicate);
+}
+
+static char* doc_getPartPageRectangles(LibreOfficeKitDocument* pThis)
+{
+    comphelper::ProfileZone aZone("doc_getPartPageRectangles");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return nullptr;
+    }
+
+    return convertOUString(pDoc->getPartPageRectangles());
+}
+
+static char* doc_getPartName(LibreOfficeKitDocument* pThis, int nPart)
+{
+    comphelper::ProfileZone aZone("doc_getPartName");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return nullptr;
+    }
+
+    return convertOUString(pDoc->getPartName(nPart));
+}
+
+static char* doc_getPartHash(LibreOfficeKitDocument* pThis, int nPart)
+{
+    comphelper::ProfileZone aZone("doc_getPartHash");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return nullptr;
+    }
+
+    return convertOUString(pDoc->getPartHash(nPart));
+}
+
+static void doc_setPartMode(LibreOfficeKitDocument* pThis,
+                            int nPartMode)
+{
+    comphelper::ProfileZone aZone("doc_setPartMode");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+
+    int nCurrentPart = pDoc->getPart();
+
+    pDoc->setPartMode(nPartMode);
+
+    // We need to make sure the internal state is updated, just changing the mode
+    // might not update the relevant shells (i.e. impress will keep rendering the
+    // previous mode unless we do this).
+    // TODO: we might want to do this within the relevant components rather than
+    // here, but that's also dependent on how we implement embedded object
+    // rendering I guess?
+    // TODO: we could be clever and e.g. set to 0 when we change to/from
+    // embedded object mode, and not when changing between slide/notes/combined
+    // modes?
+    if ( nCurrentPart < pDoc->getParts() )
+    {
+        pDoc->setPart( nCurrentPart );
+    }
+    else
+    {
+        pDoc->setPart( 0 );
+    }
+}
+
+static void doc_paintTile(LibreOfficeKitDocument* pThis,
+                          unsigned char* pBuffer,
+                          const int nCanvasWidth, const int nCanvasHeight,
+                          const int nTilePosX, const int nTilePosY,
+                          const int nTileWidth, const int nTileHeight)
+{
+    comphelper::ProfileZone aZone("doc_paintTile");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    SAL_INFO( "lok.tiledrendering", "paintTile: painting [" << nTileWidth << "x" << nTileHeight <<
+              "]@(" << nTilePosX << ", " << nTilePosY << ") to [" <<
+              nCanvasWidth << "x" << nCanvasHeight << "]px" );
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+#if defined(UNX) && !defined(MACOSX)
+
+    // Painting of zoomed or HiDPI spreadsheets is special, we actually draw everything at 100%,
+    // and only set cairo's (or CoreGraphic's, in the iOS case) scale factor accordingly, so that
+    // everything is painted bigger or smaller. This is different to what Calc's internal scaling
+    // would do - because that one is trying to fit the lines between cells to integer multiples of
+    // pixels.
+    comphelper::ScopeGuard dpiScaleGuard([]() { comphelper::LibreOfficeKit::setDPIScale(1.0); });
+
+#if defined(IOS)
+    double fDPIScaleX = 1.0;
+    paintTileIOS(pThis, pBuffer, nCanvasWidth, nCanvasHeight, fDPIScaleX, nTilePosX, nTilePosY, nTileWidth, nTileHeight);
+#else
+    ScopedVclPtrInstance< VirtualDevice > pDevice(DeviceFormat::DEFAULT);
+
+    // Set background to transparent by default.
+    pDevice->SetBackground(Wallpaper(COL_TRANSPARENT));
+
+    pDevice->SetOutputSizePixelScaleOffsetAndLOKBuffer(
+                Size(nCanvasWidth, nCanvasHeight), Fraction(1.0), Point(),
+                pBuffer);
+
+    pDoc->paintTile(*pDevice, nCanvasWidth, nCanvasHeight,
+                    nTilePosX, nTilePosY, nTileWidth, nTileHeight);
+
+    static bool bDebug = getenv("LOK_DEBUG_TILES") != nullptr;
+    if (bDebug)
+    {
+        // Draw a small red rectangle in the top left corner so that it's easy to see where a new tile begins.
+        tools::Rectangle aRect(0, 0, 5, 5);
+        aRect = pDevice->PixelToLogic(aRect);
+        pDevice->Push(PushFlags::FILLCOLOR | PushFlags::LINECOLOR);
+        pDevice->SetFillColor(COL_LIGHTRED);
+        pDevice->SetLineColor();
+        pDevice->DrawRect(aRect);
+        pDevice->Pop();
+    }
+#endif
+
+#else
+    (void) pBuffer;
+#endif
+}
+
+#ifdef IOS
+
+// This function is separate only to be used by LibreOfficeLight. If that app can be retired, this
+// function's code can be inlined.
+static void doc_paintTileToCGContext(LibreOfficeKitDocument* pThis,
+                                     void* rCGContext,
+                                     const int nCanvasWidth, const int nCanvasHeight,
+                                     const int nTilePosX, const int nTilePosY,
+                                     const int nTileWidth, const int nTileHeight)
+{
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    SAL_INFO( "lok.tiledrendering", "paintTileToCGContext: painting [" << nTileWidth << "x" << nTileHeight <<
+              "]@(" << nTilePosX << ", " << nTilePosY << ") to [" <<
+              nCanvasWidth << "x" << nCanvasHeight << "]px" );
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+    Size aCanvasSize(nCanvasWidth, nCanvasHeight);
+    paintTileToCGContext(pDoc, rCGContext, aCanvasSize, nTilePosX, nTilePosY, nTileWidth, nTileHeight);
+}
+
+#endif
+
+static void doc_paintPartTile(LibreOfficeKitDocument* pThis,
+                              unsigned char* pBuffer,
+                              const int nPart,
+                              const int nCanvasWidth, const int nCanvasHeight,
+                              const int nTilePosX, const int nTilePosY,
+                              const int nTileWidth, const int nTileHeight)
+{
+    comphelper::ProfileZone aZone("doc_paintPartTile");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    SAL_INFO( "lok.tiledrendering", "paintPartTile: painting @ " << nPart << " ["
+               << nTileWidth << "x" << nTileHeight << "]@("
+               << nTilePosX << ", " << nTilePosY << ") to ["
+               << nCanvasWidth << "x" << nCanvasHeight << "]px" );
+
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+    int nOrigViewId = doc_getView(pThis);
+
+    if (nOrigViewId < 0)
+    {
+        // tile painting always needs a SfxViewShell::Current(), but actually
+        // it does not really matter which one - all of them should paint the
+        // same thing. It's important to get a view for the correct document,
+        // though.
+        // doc_getViewsCount() returns the count of views for the document in the current view.
+        int viewCount = doc_getViewsCount(pThis);
+        if (viewCount == 0)
+            return;
+
+        std::vector<int> viewIds(viewCount);
+        doc_getViewIds(pThis, viewIds.data(), viewCount);
+
+        nOrigViewId = viewIds[0];
+        doc_setView(pThis, nOrigViewId);
+    }
+
+    // Disable callbacks while we are painting.
+    if (nOrigViewId >= 0)
+    {
+        const auto handlerIt = pDocument->mpCallbackFlushHandlers.find(nOrigViewId);
+        if (handlerIt != pDocument->mpCallbackFlushHandlers.end())
+            handlerIt->second->disableCallbacks();
+    }
+
+    try
+    {
+        // Text documents have a single coordinate system; don't change part.
+        int nOrigPart = 0;
+        const bool isText = (doc_getDocumentType(pThis) == LOK_DOCTYPE_TEXT);
+        int nViewId = nOrigViewId;
+        int nLastNonEditorView = nViewId;
+        if (!isText)
+        {
+            // Check if just switching to another view is enough, that has
+            // less side-effects.
+            if (nPart != doc_getPart(pThis))
+            {
+                SfxViewShell* pViewShell = SfxViewShell::GetFirst();
+                while (pViewShell)
+                {
+                    bool bIsInEdit = pViewShell->GetDrawView() &&
+                        pViewShell->GetDrawView()->GetTextEditOutliner();
+                    if (!bIsInEdit)
+                        nLastNonEditorView = pViewShell->GetViewShellId().get();
+
+                    if (pViewShell->getPart() == nPart && !bIsInEdit)
+                    {
+                        nViewId = pViewShell->GetViewShellId().get();
+                        nLastNonEditorView = nViewId;
+                        doc_setView(pThis, nViewId);
+                        break;
+                    }
+                    pViewShell = SfxViewShell::GetNext(*pViewShell);
+                }
+            }
+
+            // if not found view with correct part - at least avoid rendering active textbox
+            SfxViewShell* pCurrentViewShell = SfxViewShell::Current();
+            if (pCurrentViewShell && pCurrentViewShell->GetDrawView() &&
+                pCurrentViewShell->GetDrawView()->GetTextEditOutliner())
+            {
+                doc_setView(pThis, nLastNonEditorView);
+            }
+
+            nOrigPart = doc_getPart(pThis);
+            if (nPart != nOrigPart)
+            {
+                doc_setPartImpl(pThis, nPart, false);
+            }
+        }
+
+        doc_paintTile(pThis, pBuffer, nCanvasWidth, nCanvasHeight, nTilePosX, nTilePosY, nTileWidth, nTileHeight);
+
+        if (!isText && nPart != nOrigPart)
+        {
+            doc_setPartImpl(pThis, nOrigPart, false);
+        }
+        if (!isText && nViewId != nOrigViewId)
+        {
+            doc_setView(pThis, nOrigViewId);
+        }
+    }
+    catch (const std::exception&)
+    {
+        // Nothing to do but restore the PartTilePainting flag.
+    }
+
+    if (nOrigViewId >= 0)
+    {
+        const auto handlerIt = pDocument->mpCallbackFlushHandlers.find(nOrigViewId);
+        if (handlerIt != pDocument->mpCallbackFlushHandlers.end())
+            handlerIt->second->enableCallbacks();
+    }
+}
+
+static int doc_getTileMode(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/)
+{
+    SetLastExceptionMsg();
+    return LOK_TILEMODE_BGRA;
+}
+
+static void doc_getDocumentSize(LibreOfficeKitDocument* pThis,
+                                long* pWidth,
+                                long* pHeight)
+{
+    comphelper::ProfileZone aZone("doc_getDocumentSize");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (pDoc)
+    {
+        Size aDocumentSize = pDoc->getDocumentSize();
+        *pWidth = aDocumentSize.Width();
+        *pHeight = aDocumentSize.Height();
+    }
+    else
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+    }
+}
+
+static void doc_initializeForRendering(LibreOfficeKitDocument* pThis,
+                                       const char* pArguments)
+{
+    comphelper::ProfileZone aZone("doc_initializeForRendering");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (pDoc)
+    {
+        doc_iniUnoCommands();
+        pDoc->initializeForTiledRendering(
+                comphelper::containerToSequence(jsonToPropertyValuesVector(pArguments)));
+    }
+}
+
+static void doc_registerCallback(LibreOfficeKitDocument* pThis,
+                                 LibreOfficeKitCallback pCallback,
+                                 void* pData)
+{
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    const int nView = SfxLokHelper::getView();
+    if (nView < 0)
+        return;
+
+    const size_t nId = nView;
+    if (pCallback != nullptr)
+    {
+        for (auto& pair : pDocument->mpCallbackFlushHandlers)
+        {
+            if (pair.first == nId)
+                continue;
+
+            pair.second->addViewStates(nView);
+        }
+    }
+    else
+    {
+        for (auto& pair : pDocument->mpCallbackFlushHandlers)
+        {
+            if (pair.first == nId)
+                continue;
+
+            pair.second->removeViewStates(nView);
+        }
+    }
+
+    pDocument->mpCallbackFlushHandlers[nView] = std::make_shared<CallbackFlushHandler>(pThis, pCallback, pData);
+
+    if (pCallback != nullptr)
+    {
+        for (const auto& pair : pDocument->mpCallbackFlushHandlers)
+        {
+            if (pair.first == nId)
+                continue;
+
+            pDocument->mpCallbackFlushHandlers[nView]->addViewStates(pair.first);
+        }
+
+        if (SfxViewShell* pViewShell = SfxViewShell::Current())
+        {
+            pDocument->mpCallbackFlushHandlers[nView]->setViewId(pViewShell->GetViewShellId().get());
+            pViewShell->setLibreOfficeKitViewCallback(pDocument->mpCallbackFlushHandlers[nView].get());
+        }
+    }
+    else
+    {
+        if (SfxViewShell* pViewShell = SfxViewShell::Current())
+        {
+            pViewShell->setLibreOfficeKitViewCallback(nullptr);
+            pDocument->mpCallbackFlushHandlers[nView]->setViewId(-1);
+        }
+    }
+}
+
+/// Returns the JSON representation of all the comments in the document
+static char* getPostIts(LibreOfficeKitDocument* pThis)
+{
+    SetLastExceptionMsg();
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return nullptr;
+    }
+    tools::JsonWriter aJsonWriter;
+    pDoc->getPostIts(aJsonWriter);
+    return aJsonWriter.extractData();
+}
+
+/// Returns the JSON representation of the positions of all the comments in the document
+static char* getPostItsPos(LibreOfficeKitDocument* pThis)
+{
+    SetLastExceptionMsg();
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return nullptr;
+    }
+    tools::JsonWriter aJsonWriter;
+    pDoc->getPostItsPos(aJsonWriter);
+    return aJsonWriter.extractData();
+}
+
+static char* getRulerState(LibreOfficeKitDocument* pThis)
+{
+    SetLastExceptionMsg();
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return nullptr;
+    }
+    tools::JsonWriter aJsonWriter;
+    pDoc->getRulerState(aJsonWriter);
+    return aJsonWriter.extractData();
+}
+
+static void doc_postKeyEvent(LibreOfficeKitDocument* pThis, int nType, int nCharCode, int nKeyCode)
+{
+    comphelper::ProfileZone aZone("doc_postKeyEvent");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+    try
+    {
+        pDoc->postKeyEvent(nType, nCharCode, nKeyCode);
+    }
+    catch (const uno::Exception& exception)
+    {
+        SetLastExceptionMsg(exception.Message);
+        SAL_INFO("lok", "Failed to postKeyEvent " << exception.Message);
+    }
+}
+
+static void doc_setBlockedCommandList(LibreOfficeKitDocument* /*pThis*/, int nViewId, const char* blockedCommandList)
+{
+    SolarMutexGuard aGuard;
+    SfxLokHelper::setBlockedCommandList(nViewId, blockedCommandList);
+}
+
+static void doc_postWindowExtTextInputEvent(LibreOfficeKitDocument* pThis, unsigned nWindowId, int nType, const char* pText)
+{
+    comphelper::ProfileZone aZone("doc_postWindowExtTextInputEvent");
+
+    SolarMutexGuard aGuard;
+    VclPtr<vcl::Window> pWindow;
+    if (nWindowId == 0)
+    {
+        ITiledRenderable* pDoc = getTiledRenderable(pThis);
+        if (!pDoc)
+        {
+            SetLastExceptionMsg("Document doesn't support tiled rendering");
+            return;
+        }
+        pWindow = pDoc->getDocWindow();
+    }
+    else
+    {
+        pWindow = vcl::Window::FindLOKWindow(nWindowId);
+    }
+
+    if (!pWindow)
+    {
+        SetLastExceptionMsg("No window found for window id: " + OUString::number(nWindowId));
+        return;
+    }
+
+    SfxLokHelper::postExtTextEventAsync(pWindow, nType, OUString::fromUtf8(std::string_view(pText, strlen(pText))));
+}
+
+static void doc_removeTextContext(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId, int nCharBefore, int nCharAfter)
+{
+    SolarMutexGuard aGuard;
+    VclPtr<vcl::Window> pWindow;
+    if (nLOKWindowId == 0)
+    {
+        ITiledRenderable* pDoc = getTiledRenderable(pThis);
+        if (!pDoc)
+        {
+            gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
+            return;
+        }
+        pWindow = pDoc->getDocWindow();
+    }
+    else
+    {
+        pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
+    }
+
+    if (!pWindow)
+    {
+        gImpl->maLastExceptionMsg = "No window found for window id: " + OUString::number(nLOKWindowId);
+        return;
+    }
+
+    // Annoyingly - backspace and delete are handled in the apps via an accelerator
+    // which are PostMessage'd by SfxViewShell::ExecKey_Impl so to stay in the same
+    // order we do this synchronously here, unless we're in a dialog.
+    if (nCharBefore > 0)
+    {
+        // backspace
+        if (nLOKWindowId == 0)
+        {
+            KeyEvent aEvt(8, 1283);
+            for (int i = 0; i < nCharBefore; ++i)
+                pWindow->KeyInput(aEvt);
+        }
+        else
+            SfxLokHelper::postKeyEventAsync(pWindow, LOK_KEYEVENT_KEYINPUT, 8, 1283, nCharBefore - 1);
+    }
+
+    if (nCharAfter > 0)
+    {
+        // delete (forward)
+        if (nLOKWindowId == 0)
+        {
+            KeyEvent aEvt(46, 1286);
+            for (int i = 0; i < nCharAfter; ++i)
+                pWindow->KeyInput(aEvt);
+        }
+        else
+            SfxLokHelper::postKeyEventAsync(pWindow, LOK_KEYEVENT_KEYINPUT, 46, 1286, nCharAfter - 1);
+    }
+}
+
+static void doc_postWindowKeyEvent(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId, int nType, int nCharCode, int nKeyCode)
+{
+    comphelper::ProfileZone aZone("doc_postWindowKeyEvent");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
+    if (!pWindow)
+    {
+        SetLastExceptionMsg("Document doesn't support dialog rendering, or window not found.");
+        return;
+    }
+
+    KeyEvent aEvent(nCharCode, nKeyCode, 0);
+
+    switch (nType)
+    {
+        case LOK_KEYEVENT_KEYINPUT:
+            Application::PostKeyEvent(VclEventId::WindowKeyInput, pWindow, &aEvent);
+            break;
+        case LOK_KEYEVENT_KEYUP:
+            Application::PostKeyEvent(VclEventId::WindowKeyUp, pWindow, &aEvent);
+            break;
+        default:
+            assert(false);
+            break;
+    }
+}
+
+static size_t doc_renderShapeSelection(LibreOfficeKitDocument* pThis, char** pOutput)
+{
+    comphelper::ProfileZone aZone("doc_renderShapeSelection");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    LokChartHelper aChartHelper(SfxViewShell::Current());
+
+    if (aChartHelper.GetWindow())
+        return 0;
+
+    try
+    {
+        LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+        uno::Reference<frame::XStorable> xStorable(pDocument->mxComponent, uno::UNO_QUERY_THROW);
+
+        SvMemoryStream aOutStream;
+        uno::Reference<io::XOutputStream> xOut = new utl::OOutputStreamWrapper(aOutStream);
+
+        utl::MediaDescriptor aMediaDescriptor;
+        switch (doc_getDocumentType(pThis))
+        {
+            case LOK_DOCTYPE_PRESENTATION:
+                aMediaDescriptor["FilterName"] <<= OUString("impress_svg_Export");
+                break;
+            case LOK_DOCTYPE_DRAWING:
+                aMediaDescriptor["FilterName"] <<= OUString("draw_svg_Export");
+                break;
+            case LOK_DOCTYPE_TEXT:
+                aMediaDescriptor["FilterName"] <<= OUString("writer_svg_Export");
+                break;
+            case LOK_DOCTYPE_SPREADSHEET:
+                aMediaDescriptor["FilterName"] <<= OUString("calc_svg_Export");
+                break;
+            default:
+                SAL_WARN("lok", "Failed to render shape selection: Document type is not supported");
+        }
+        aMediaDescriptor["SelectionOnly"] <<= true;
+        aMediaDescriptor["OutputStream"] <<= xOut;
+        aMediaDescriptor["IsPreview"] <<= true; // will down-scale graphics
+
+        xStorable->storeToURL("private:stream", aMediaDescriptor.getAsConstPropertyValueList());
+
+        if (pOutput)
+        {
+            const size_t nOutputSize = aOutStream.GetEndOfData();
+            *pOutput = static_cast<char*>(malloc(nOutputSize));
+            if (*pOutput)
+            {
+                std::memcpy(*pOutput, aOutStream.GetData(), nOutputSize);
+                return nOutputSize;
+            }
+        }
+    }
+    catch (const uno::Exception& exception)
+    {
+        css::uno::Any exAny( cppu::getCaughtException() );
+        SetLastExceptionMsg(exception.Message);
+        SAL_WARN("lok", "Failed to render shape selection: " << exceptionToString(exAny));
+    }
+
+    return 0;
+}
+
+namespace {
+
+/** Class to react on finishing of a dispatched command.
+
+    This will call a LOK_COMMAND_FINISHED callback when postUnoCommand was
+    called with the parameter requesting the notification.
+
+    @see LibreOfficeKitCallbackType::LOK_CALLBACK_UNO_COMMAND_RESULT.
+*/
+class DispatchResultListener : public cppu::WeakImplHelper<css::frame::XDispatchResultListener>
+{
+    OString maCommand;                 ///< Command for which this is the result.
+    std::shared_ptr<CallbackFlushHandler> mpCallback; ///< Callback to call.
+
+public:
+    DispatchResultListener(const char* pCommand, std::shared_ptr<CallbackFlushHandler> pCallback)
+        : maCommand(pCommand)
+        , mpCallback(std::move(pCallback))
+    {
+        assert(mpCallback);
+    }
+
+    virtual void SAL_CALL dispatchFinished(const css::frame::DispatchResultEvent& rEvent) override
+    {
+        tools::JsonWriter aJson;
+        aJson.put("commandName", maCommand);
+
+        if (rEvent.State != frame::DispatchResultState::DONTKNOW)
+        {
+            bool bSuccess = (rEvent.State == frame::DispatchResultState::SUCCESS);
+            aJson.put("success", bSuccess);
+        }
+
+        unoAnyToJson(aJson, "result", rEvent.Result);
+        mpCallback->queue(LOK_CALLBACK_UNO_COMMAND_RESULT, aJson.extractData());
+    }
+
+    virtual void SAL_CALL disposing(const css::lang::EventObject&) override {}
+};
+
+} // anonymous namespace
+
+
+static void lcl_sendDialogEvent(unsigned long long int nWindowId, const char* pArguments)
+{
+    SolarMutexGuard aGuard;
+
+    StringMap aMap(jsdialog::jsonToStringMap(pArguments));
+
+    if (aMap.find("id") == aMap.end())
+        return;
+
+    sal_uInt64 nCurrentShellId = reinterpret_cast<sal_uInt64>(SfxViewShell::Current());
+
+    try
+    {
+        OString sControlId = OUStringToOString(aMap["id"], RTL_TEXTENCODING_ASCII_US);
+
+        // dialogs send own id but notebookbar and sidebar controls are remembered by SfxViewShell id
+        bool bFoundWeldedControl = jsdialog::ExecuteAction(std::to_string(nWindowId), sControlId, aMap);
+        if (!bFoundWeldedControl)
+            bFoundWeldedControl = jsdialog::ExecuteAction(std::to_string(nCurrentShellId) + "sidebar", sControlId, aMap);
+        if (!bFoundWeldedControl)
+            bFoundWeldedControl = jsdialog::ExecuteAction(std::to_string(nCurrentShellId) + "notebookbar", sControlId, aMap);
+        if (!bFoundWeldedControl)
+            bFoundWeldedControl = jsdialog::ExecuteAction(std::to_string(nCurrentShellId) + "formulabar", sControlId, aMap);
+        if (!bFoundWeldedControl && !SfxViewShell::Current())
+        {
+            // this is needed for dialogs shown before document is loaded: MacroWarning dialog, etc...
+            // these dialogs are created with WindowId "0"
+            bFoundWeldedControl = jsdialog::ExecuteAction("0", sControlId, aMap);
+        }
+
+        if (bFoundWeldedControl)
+            return;
+
+        // force resend - used in mobile-wizard
+        jsdialog::SendFullUpdate(std::to_string(nCurrentShellId) + "sidebar", "Panel");
+
+    } catch(...) {}
+}
+
+
+static void doc_sendDialogEvent(LibreOfficeKitDocument* /*pThis*/, unsigned long long int nWindowId, const char* pArguments)
+{
+    lcl_sendDialogEvent(nWindowId, pArguments);
+}
+
+static void lo_sendDialogEvent(LibreOfficeKit* /*pThis*/, unsigned long long int nWindowId, const char* pArguments)
+{
+    lcl_sendDialogEvent(nWindowId, pArguments);
+}
+
+static void lo_setOption(LibreOfficeKit* /*pThis*/, const char *pOption, const char* pValue)
+{
+    static char* pCurrentSalLogOverride = nullptr;
+
+    if (strcmp(pOption, "traceeventrecording") == 0)
+    {
+        if (strcmp(pValue, "start") == 0)
+        {
+            comphelper::TraceEvent::setBufferSizeAndCallback(100, TraceEventDumper::flushRecordings);
+            comphelper::TraceEvent::startRecording();
+            if (traceEventDumper == nullptr)
+                traceEventDumper = new TraceEventDumper();
+        }
+        else if (strcmp(pValue, "stop") == 0)
+            comphelper::TraceEvent::stopRecording();
+    }
+    else if (strcmp(pOption, "sallogoverride") == 0)
+    {
+        if (pCurrentSalLogOverride != nullptr)
+            free(pCurrentSalLogOverride);
+        if (pValue == nullptr)
+            pCurrentSalLogOverride = nullptr;
+        else
+            pCurrentSalLogOverride = strdup(pValue);
+
+        if (pCurrentSalLogOverride == nullptr || pCurrentSalLogOverride[0] == '\0')
+            sal_detail_set_log_selector(nullptr);
+        else
+            sal_detail_set_log_selector(pCurrentSalLogOverride);
+    }
+    else if (strcmp(pOption, "addfont") == 0)
+    {
+        OutputDevice *pDevice = Application::GetDefaultDevice();
+        OutputDevice::ImplClearAllFontData(false);
+        pDevice->AddTempDevFont(OUString::fromUtf8(pValue), "");
+        OutputDevice::ImplRefreshAllFontData(false);
+    }
+}
+
+static void doc_postUnoCommand(LibreOfficeKitDocument* pThis, const char* pCommand, const char* pArguments, bool bNotifyWhenFinished)
+{
+    comphelper::ProfileZone aZone("doc_postUnoCommand");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    SfxObjectShell* pDocSh = SfxObjectShell::Current();
+    OUString aCommand(pCommand, strlen(pCommand), RTL_TEXTENCODING_UTF8);
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    std::vector<beans::PropertyValue> aPropertyValuesVector(jsonToPropertyValuesVector(pArguments));
+
+    if (!vcl::lok::isUnipoll())
+    {
+        beans::PropertyValue aSynchronMode;
+        aSynchronMode.Name = "SynchronMode";
+        aSynchronMode.Value <<= false;
+        aPropertyValuesVector.push_back(aSynchronMode);
+    }
+
+    int nView = SfxLokHelper::getView();
+    if (nView < 0)
+        return;
+
+    if (gImpl && aCommand == ".uno:ToggleOrientation")
+    {
+        ExecuteOrientationChange();
+        return;
+    }
+
+    // handle potential interaction
+    if (gImpl && aCommand == ".uno:Save")
+    {
+        // Check if saving a PDF file
+        OUString aMimeType = lcl_getCurrentDocumentMimeType(pDocument);
+        if (pDocSh && pDocSh->IsModified() && aMimeType == "application/pdf")
+        {
+            // If we have a PDF file (for saving annotations for example), we need
+            // to run save-as to the same file as the opened document. Plain save
+            // doesn't work as the PDF is not a "native" format.
+            uno::Reference<frame::XStorable> xStorable(pDocument->mxComponent, uno::UNO_QUERY_THROW);
+            OUString aURL = xStorable->getLocation();
+            OString aURLUtf8 = OUStringToOString(aURL, RTL_TEXTENCODING_UTF8);
+            bool bResult = doc_saveAs(pThis, aURLUtf8.getStr(), "pdf", nullptr);
+
+            // Send the result of save
+            tools::JsonWriter aJson;
+            aJson.put("commandName", pCommand);
+            aJson.put("success", bResult);
+            pDocument->mpCallbackFlushHandlers[nView]->queue(LOK_CALLBACK_UNO_COMMAND_RESULT, aJson.extractData());
+            return;
+        }
+
+
+        rtl::Reference<LOKInteractionHandler> const pInteraction(
+            new LOKInteractionHandler("save", gImpl, pDocument));
+        uno::Reference<task::XInteractionHandler2> const xInteraction(pInteraction);
+
+        beans::PropertyValue aValue;
+        aValue.Name = "InteractionHandler";
+        aValue.Value <<= xInteraction;
+        aPropertyValuesVector.push_back(aValue);
+
+        bool bDontSaveIfUnmodified = false;
+        aPropertyValuesVector.erase(std::remove_if(aPropertyValuesVector.begin(),
+                                                   aPropertyValuesVector.end(),
+                                                   [&bDontSaveIfUnmodified](const beans::PropertyValue& aItem){
+                                                       if (aItem.Name == "DontSaveIfUnmodified")
+                                                       {
+                                                           bDontSaveIfUnmodified = aItem.Value.get<bool>();
+                                                           return true;
+                                                       }
+                                                       return false;
+                                                   }), aPropertyValuesVector.end());
+
+        // skip saving and tell the result via UNO_COMMAND_RESULT
+        if (bDontSaveIfUnmodified && (!pDocSh || !pDocSh->IsModified()))
+        {
+            tools::JsonWriter aJson;
+            aJson.put("commandName", pCommand);
+            aJson.put("success", false);
+            // Add the reason for not saving
+            {
+                auto resultNode = aJson.startNode("result");
+                aJson.put("type", "string");
+                aJson.put("value", "unmodified");
+            }
+            pDocument->mpCallbackFlushHandlers[nView]->queue(LOK_CALLBACK_UNO_COMMAND_RESULT, aJson.extractData());
+            return;
+        }
+    }
+    else if (gImpl && aCommand == ".uno:TransformDialog")
+    {
+        bool bNeedConversion = false;
+        SfxViewShell* pViewShell = SfxViewShell::Current();
+        LokChartHelper aChartHelper(pViewShell);
+
+        if (aChartHelper.GetWindow() )
+        {
+            bNeedConversion = true;
+        }
+        else if (const SdrView* pView = pViewShell->GetDrawView())
+        {
+            if (OutputDevice* pOutputDevice = pView->GetFirstOutputDevice())
+            {
+                bNeedConversion = (pOutputDevice->GetMapMode().GetMapUnit() == MapUnit::Map100thMM);
+            }
+        }
+
+        if (bNeedConversion)
+        {
+            sal_Int32 value;
+            for (beans::PropertyValue& rPropValue: aPropertyValuesVector)
+            {
+                if (rPropValue.Name == "TransformPosX"
+                        || rPropValue.Name == "TransformPosY"
+                        || rPropValue.Name == "TransformWidth"
+                        || rPropValue.Name == "TransformHeight"
+                        || rPropValue.Name == "TransformRotationX"
+                        || rPropValue.Name == "TransformRotationY")
+                {
+                    rPropValue.Value >>= value;
+                    value = o3tl::convert(value, o3tl::Length::twip, o3tl::Length::mm100);
+                    rPropValue.Value <<= value;
+                }
+            }
+        }
+
+        if (aChartHelper.GetWindow() && aPropertyValuesVector.size() > 0)
+        {
+            if (aPropertyValuesVector[0].Name != "Action")
+            {
+                tools::Rectangle aChartBB = aChartHelper.GetChartBoundingBox();
+
+                int nLeft = o3tl::convert(aChartBB.Left(), o3tl::Length::twip, o3tl::Length::mm100);
+                int nTop = o3tl::convert(aChartBB.Top(), o3tl::Length::twip, o3tl::Length::mm100);
+
+                for (beans::PropertyValue& rPropValue: aPropertyValuesVector)
+                {
+                    if (rPropValue.Name == "TransformPosX" || rPropValue.Name == "TransformRotationX")
+                    {
+                        auto const value = *o3tl::doAccess<sal_Int32>(rPropValue.Value);
+                        rPropValue.Value <<= value - nLeft;
+                    }
+                    else if (rPropValue.Name == "TransformPosY" || rPropValue.Name == "TransformRotationY")
+                    {
+                        auto const value = *o3tl::doAccess<sal_Int32>(rPropValue.Value);
+                        rPropValue.Value <<= value - nTop;
+                    }
+                }
+            }
+            util::URL aCommandURL;
+            aCommandURL.Path = "LOKTransform";
+            css::uno::Reference<css::frame::XDispatch>& aChartDispatcher = aChartHelper.GetXDispatcher();
+            aChartDispatcher->dispatch(aCommandURL, comphelper::containerToSequence(aPropertyValuesVector));
+            return;
+        }
+    }
+    else if (gImpl && aCommand == ".uno:LOKSidebarWriterPage")
+    {
+        setupSidebar(u"WriterPageDeck");
+        return;
+    }
+    else if (gImpl && aCommand == ".uno:SidebarShow")
+    {
+        setupSidebar();
+        return;
+    }
+    else if (gImpl && aCommand == ".uno:SidebarHide")
+    {
+        hideSidebar();
+        return;
+    }
+
+    bool bResult = false;
+    LokChartHelper aChartHelper(SfxViewShell::Current());
+
+    if (aChartHelper.GetWindow() && aCommand != ".uno:Save" )
+    {
+        util::URL aCommandURL;
+        aCommandURL.Path = aCommand.copy(5);
+        css::uno::Reference<css::frame::XDispatch>& aChartDispatcher = aChartHelper.GetXDispatcher();
+        aChartDispatcher->dispatch(aCommandURL, comphelper::containerToSequence(aPropertyValuesVector));
+        return;
+    }
+    else if (bNotifyWhenFinished && pDocument->mpCallbackFlushHandlers.count(nView))
+    {
+        bResult = comphelper::dispatchCommand(aCommand, comphelper::containerToSequence(aPropertyValuesVector),
+                new DispatchResultListener(pCommand, pDocument->mpCallbackFlushHandlers[nView]));
+    }
+    else
+        bResult = comphelper::dispatchCommand(aCommand, comphelper::containerToSequence(aPropertyValuesVector));
+
+    if (!bResult)
+    {
+        SetLastExceptionMsg("Failed to dispatch " + aCommand);
+    }
+}
+
+static void doc_postMouseEvent(LibreOfficeKitDocument* pThis, int nType, int nX, int nY, int nCount, int nButtons, int nModifier)
+{
+    comphelper::ProfileZone aZone("doc_postMouseEvent");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+    try
+    {
+        pDoc->postMouseEvent(nType, nX, nY, nCount, nButtons, nModifier);
+    }
+    catch (const uno::Exception& exception)
+    {
+        SetLastExceptionMsg(exception.Message);
+        SAL_INFO("lok", "Failed to postMouseEvent " << exception.Message);
+    }
+}
+
+static void doc_postWindowMouseEvent(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId, int nType, int nX, int nY, int nCount, int nButtons, int nModifier)
+{
+    comphelper::ProfileZone aZone("doc_postWindowMouseEvent");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
+    if (!pWindow)
+    {
+        SetLastExceptionMsg("Document doesn't support dialog rendering, or window not found.");
+        return;
+    }
+
+    const Point aPos(nX, nY);
+
+    MouseEvent aEvent(aPos, nCount, MouseEventModifiers::SIMPLECLICK, nButtons, nModifier);
+
+    vcl::EnableDialogInput(pWindow);
+
+    switch (nType)
+    {
+        case LOK_MOUSEEVENT_MOUSEBUTTONDOWN:
+            Application::PostMouseEvent(VclEventId::WindowMouseButtonDown, pWindow, &aEvent);
+            break;
+        case LOK_MOUSEEVENT_MOUSEBUTTONUP:
+            Application::PostMouseEvent(VclEventId::WindowMouseButtonUp, pWindow, &aEvent);
+            break;
+        case LOK_MOUSEEVENT_MOUSEMOVE:
+            Application::PostMouseEvent(VclEventId::WindowMouseMove, pWindow, &aEvent);
+            break;
+        default:
+            assert(false);
+            break;
+    }
+}
+
+static void doc_postWindowGestureEvent(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId, const char* pType, int nX, int nY, int nOffset)
+{
+    comphelper::ProfileZone aZone("doc_postWindowGestureEvent");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
+    if (!pWindow)
+    {
+        SetLastExceptionMsg("Document doesn't support dialog rendering, or window not found.");
+        return;
+    }
+
+    OString aType(pType);
+    GestureEventType eEventType = GestureEventType::PanningUpdate;
+
+    if (aType == "panBegin")
+        eEventType = GestureEventType::PanningBegin;
+    else if (aType == "panEnd")
+        eEventType = GestureEventType::PanningEnd;
+
+    GestureEvent aEvent {
+        sal_Int32(nX),
+        sal_Int32(nY),
+        eEventType,
+        sal_Int32(nOffset),
+        PanningOrientation::Vertical,
+    };
+
+    vcl::EnableDialogInput(pWindow);
+
+    Application::PostGestureEvent(VclEventId::WindowGestureEvent, pWindow, &aEvent);
+}
+
+static void doc_setTextSelection(LibreOfficeKitDocument* pThis, int nType, int nX, int nY)
+{
+    comphelper::ProfileZone aZone("doc_setTextSelection");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+    pDoc->setTextSelection(nType, nX, nY);
+}
+
+static void doc_setWindowTextSelection(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId, bool swap, int nX, int nY)
+{
+    comphelper::ProfileZone aZone("doc_setWindowTextSelection");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
+    if (!pWindow)
+    {
+        SetLastExceptionMsg("Document doesn't support dialog rendering, or window not found.");
+        return;
+    }
+
+
+    Size aOffset(pWindow->GetOutOffXPixel(), pWindow->GetOutOffYPixel());
+    Point aCursorPos(nX, nY);
+    aCursorPos.Move(aOffset);
+    sal_uInt16 nModifier = swap ? KEY_MOD1 + KEY_MOD2 : KEY_SHIFT;
+
+    MouseEvent aCursorEvent(aCursorPos, 1, MouseEventModifiers::SIMPLECLICK, 0, nModifier);
+    Application::PostMouseEvent(VclEventId::WindowMouseButtonDown, pWindow, &aCursorEvent);
+    Application::PostMouseEvent(VclEventId::WindowMouseButtonUp, pWindow, &aCursorEvent);
+}
+
+static bool getFromTransferrable(
+    const css::uno::Reference<css::datatransfer::XTransferable> &xTransferable,
+    const OString &aInMimeType, OString &aRet);
+
+static bool encodeImageAsHTML(
+    const css::uno::Reference<css::datatransfer::XTransferable> &xTransferable,
+    const OString &aMimeType, OString &aRet)
+{
+    if (!getFromTransferrable(xTransferable, aMimeType, aRet))
+        return false;
+
+    // Encode in base64.
+    auto aSeq = Sequence<sal_Int8>(reinterpret_cast<const sal_Int8*>(aRet.getStr()),
+                                   aRet.getLength());
+    OUStringBuffer aBase64Data;
+    comphelper::Base64::encode(aBase64Data, aSeq);
+
+    // Embed in HTML.
+    aRet = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">\n"
+        "<html><head>"
+        "<meta http-equiv=\"content-type\" content=\"text/html; charset=utf-8\"/><meta "
+        "name=\"generator\" content=\""
+        + getGenerator().toUtf8()
+        + "\"/>"
+        "</head><body><img src=\"data:" + aMimeType + ";base64,"
+        + aBase64Data.makeStringAndClear().toUtf8() + "\"/></body></html>";
+
+    return true;
+}
+
+static bool encodeTextAsHTML(
+    const css::uno::Reference<css::datatransfer::XTransferable> &xTransferable,
+    const OString &aMimeType, OString &aRet)
+{
+    if (!getFromTransferrable(xTransferable, aMimeType, aRet))
+        return false;
+
+    // Embed in HTML - FIXME: needs some escaping.
+    aRet = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">\n"
+        "<html><head>"
+        "<meta http-equiv=\"content-type\" content=\"text/html; charset=utf-8\"/><meta "
+        "name=\"generator\" content=\""
+        + getGenerator().toUtf8()
+        + "\"/></head><body><pre>" + aRet + "</pre></body></html>";
+
+    return true;
+}
+
+static bool getFromTransferrable(
+    const css::uno::Reference<css::datatransfer::XTransferable> &xTransferable,
+    const OString &aInMimeType, OString &aRet)
+{
+    OString aMimeType(aInMimeType);
+
+    // Take care of UTF-8 text here.
+    bool bConvert = false;
+    sal_Int32 nIndex = 0;
+    if (o3tl::getToken(aMimeType, 0, ';', nIndex) == "text/plain")
+    {
+        if (o3tl::getToken(aMimeType, 0, ';', nIndex) == "charset=utf-8")
+        {
+            aMimeType = "text/plain;charset=utf-16";
+            bConvert = true;
+        }
+    }
+
+    datatransfer::DataFlavor aFlavor;
+    aFlavor.MimeType = OUString::fromUtf8(aMimeType.getStr());
+    if (aMimeType == "text/plain;charset=utf-16")
+        aFlavor.DataType = cppu::UnoType<OUString>::get();
+    else
+        aFlavor.DataType = cppu::UnoType< uno::Sequence<sal_Int8> >::get();
+
+    if (!xTransferable->isDataFlavorSupported(aFlavor))
+    {
+        // Try harder for HTML it is our copy/paste meta-file format
+        if (aInMimeType == "text/html")
+        {
+            // Desperate measures - convert text to HTML instead.
+            if (encodeTextAsHTML(xTransferable, "text/plain;charset=utf-8", aRet))
+                return true;
+            // If html is not supported, might be a graphic-selection,
+            if (encodeImageAsHTML(xTransferable, "image/png", aRet))
+                return true;
+        }
+
+        SetLastExceptionMsg("Flavor " + aFlavor.MimeType + " is not supported");
+        return false;
+    }
+
+    uno::Any aAny;
+    try
+    {
+        aAny = xTransferable->getTransferData(aFlavor);
+    }
+    catch (const css::datatransfer::UnsupportedFlavorException& e)
+    {
+        SetLastExceptionMsg("Unsupported flavor " + aFlavor.MimeType + " exception " + e.Message);
+        return false;
+    }
+    catch (const css::uno::Exception& e)
+    {
+        SetLastExceptionMsg("Exception getting " + aFlavor.MimeType + " exception " + e.Message);
+        return false;
+    }
+
+    if (aFlavor.DataType == cppu::UnoType<OUString>::get())
+    {
+        OUString aString;
+        aAny >>= aString;
+        if (bConvert)
+            aRet = OUStringToOString(aString, RTL_TEXTENCODING_UTF8);
+        else
+            aRet = OString(reinterpret_cast<const char *>(aString.getStr()), aString.getLength() * sizeof(sal_Unicode));
+    }
+    else
+    {
+        uno::Sequence<sal_Int8> aSequence;
+        aAny >>= aSequence;
+        aRet = OString(reinterpret_cast<const char*>(aSequence.getConstArray()), aSequence.getLength());
+    }
+
+    return true;
+}
+
+static char* doc_getTextSelection(LibreOfficeKitDocument* pThis, const char* pMimeType, char** pUsedMimeType)
+{
+    comphelper::ProfileZone aZone("doc_getTextSelection");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return nullptr;
+    }
+
+    css::uno::Reference<css::datatransfer::XTransferable> xTransferable = pDoc->getSelection();
+    if (!xTransferable)
+    {
+        SetLastExceptionMsg("No selection available");
+        return nullptr;
+    }
+
+    const char *pType = pMimeType;
+    if (!pType || pType[0] == '\0')
+        pType = "text/plain;charset=utf-8";
+
+    OString aRet;
+    bool bSuccess = getFromTransferrable(xTransferable, OString(pType), aRet);
+    if (!bSuccess)
+        return nullptr;
+
+    if (pUsedMimeType) // legacy
+    {
+        if (pMimeType)
+            *pUsedMimeType = strdup(pMimeType);
+        else
+            *pUsedMimeType = nullptr;
+    }
+
+    return convertOString(aRet);
+}
+
+static int doc_getSelectionType(LibreOfficeKitDocument* pThis)
+{
+    comphelper::ProfileZone aZone("doc_getSelectionType");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return LOK_SELTYPE_NONE;
+    }
+
+    css::uno::Reference<css::datatransfer::XTransferable> xTransferable = pDoc->getSelection();
+    if (!xTransferable)
+    {
+        SetLastExceptionMsg("No selection available");
+        return LOK_SELTYPE_NONE;
+    }
+
+    css::uno::Reference<css::datatransfer::XTransferable2> xTransferable2(xTransferable, css::uno::UNO_QUERY);
+    if (xTransferable2.is() && xTransferable2->isComplex())
+        return LOK_SELTYPE_COMPLEX;
+
+    OString aRet;
+    bool bSuccess = getFromTransferrable(xTransferable, "text/plain;charset=utf-8", aRet);
+    if (!bSuccess)
+        return LOK_SELTYPE_NONE;
+
+    if (aRet.getLength() > 10000)
+        return LOK_SELTYPE_COMPLEX;
+
+    return !aRet.isEmpty() ? LOK_SELTYPE_TEXT : LOK_SELTYPE_NONE;
+}
+
+static int doc_getSelectionTypeAndText(LibreOfficeKitDocument* pThis, const char* pMimeType, char** pText, char** pUsedMimeType)
+{
+    // The purpose of this function is to avoid double call to pDoc->getSelection(),
+    // which may be expensive.
+    comphelper::ProfileZone aZone("doc_getSelectionTypeAndText");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return LOK_SELTYPE_NONE;
+    }
+
+    css::uno::Reference<css::datatransfer::XTransferable> xTransferable = pDoc->getSelection();
+    if (!xTransferable)
+    {
+        SetLastExceptionMsg("No selection available");
+        return LOK_SELTYPE_NONE;
+    }
+
+    css::uno::Reference<css::datatransfer::XTransferable2> xTransferable2(xTransferable, css::uno::UNO_QUERY);
+    if (xTransferable2.is() && xTransferable2->isComplex())
+        return LOK_SELTYPE_COMPLEX;
+
+    const char *pType = pMimeType;
+    if (!pType || pType[0] == '\0')
+        pType = "text/plain;charset=utf-8";
+
+    OString aRet;
+    bool bSuccess = getFromTransferrable(xTransferable, OString(pType), aRet);
+    if (!bSuccess)
+        return LOK_SELTYPE_NONE;
+
+    if (aRet.getLength() > 10000)
+        return LOK_SELTYPE_COMPLEX;
+
+    if (aRet.isEmpty())
+        return LOK_SELTYPE_NONE;
+
+    if (pText)
+        *pText = convertOString(aRet);
+
+    if (pUsedMimeType) // legacy
+    {
+        if (pMimeType)
+            *pUsedMimeType = strdup(pMimeType);
+        else
+            *pUsedMimeType = nullptr;
+    }
+
+    return LOK_SELTYPE_TEXT;
+}
+
+static int doc_getClipboard(LibreOfficeKitDocument* pThis,
+                            const char **pMimeTypes,
+                            size_t      *pOutCount,
+                            char      ***pOutMimeTypes,
+                            size_t     **pOutSizes,
+                            char      ***pOutStreams)
+{
+#ifdef IOS
+    (void) pThis;
+    (void) pMimeTypes;
+    (void) pOutCount;
+    (void) pOutMimeTypes;
+    (void) pOutSizes;
+    (void) pOutStreams;
+
+    assert(!"doc_getClipboard should not be called on iOS");
+
+    return 0;
+#else
+    comphelper::ProfileZone aZone("doc_getClipboard");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    assert (pOutCount);
+    assert (pOutMimeTypes);
+    assert (pOutSizes);
+    assert (pOutStreams);
+
+    *pOutCount = 0;
+    *pOutMimeTypes = nullptr;
+    *pOutSizes = nullptr;
+    *pOutStreams = nullptr;
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return 0;
+    }
+
+    rtl::Reference<LOKClipboard> xClip(LOKClipboardFactory::getClipboardForCurView());
+
+    css::uno::Reference<css::datatransfer::XTransferable> xTransferable = xClip->getContents();
+    SAL_INFO("lok", "Got from clip: " << xClip.get() << " transferrable: " << xTransferable);
+    if (!xTransferable)
+    {
+        SetLastExceptionMsg("No clipboard content available");
+        return 0;
+    }
+
+    std::vector<OString> aMimeTypes;
+    if (!pMimeTypes) // everything
+    {
+        const uno::Sequence< css::datatransfer::DataFlavor > flavors = xTransferable->getTransferDataFlavors();
+        if (!flavors.getLength())
+        {
+            SetLastExceptionMsg("Flavourless selection");
+            return 0;
+        }
+        for (const auto &it : flavors)
+            aMimeTypes.push_back(OUStringToOString(it.MimeType, RTL_TEXTENCODING_UTF8));
+    }
+    else
+    {
+        for (size_t i = 0; pMimeTypes[i]; ++i)
+            aMimeTypes.push_back(OString(pMimeTypes[i]));
+    }
+
+    *pOutCount = aMimeTypes.size();
+    *pOutSizes = static_cast<size_t *>(malloc(*pOutCount * sizeof(size_t)));
+    *pOutMimeTypes = static_cast<char **>(malloc(*pOutCount * sizeof(char *)));
+    *pOutStreams = static_cast<char **>(malloc(*pOutCount * sizeof(char *)));
+    for (size_t i = 0; i < aMimeTypes.size(); ++i)
+    {
+        if (aMimeTypes[i] == "text/plain;charset=utf-16")
+            (*pOutMimeTypes)[i] = strdup("text/plain;charset=utf-8");
+        else
+            (*pOutMimeTypes)[i] = strdup(aMimeTypes[i].getStr());
+
+        OString aRet;
+        bool bSuccess = getFromTransferrable(xTransferable, (*pOutMimeTypes)[i], aRet);
+        if (!bSuccess || aRet.getLength() < 1)
+        {
+            (*pOutSizes)[i] = 0;
+            (*pOutStreams)[i] = nullptr;
+        }
+        else
+        {
+            (*pOutSizes)[i] = aRet.getLength();
+            (*pOutStreams)[i] = convertOString(aRet);
+        }
+    }
+
+    return 1;
+#endif
+}
+
+static int doc_setClipboard(LibreOfficeKitDocument* pThis,
+                            const size_t   nInCount,
+                            const char   **pInMimeTypes,
+                            const size_t  *pInSizes,
+                            const char   **pInStreams)
+{
+#ifdef IOS
+    (void) pThis;
+    (void) nInCount;
+    (void) pInMimeTypes;
+    (void) pInSizes;
+    (void) pInStreams;
+#else
+    comphelper::ProfileZone aZone("doc_setClipboard");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return false;
+    }
+
+    uno::Reference<datatransfer::XTransferable> xTransferable(new LOKTransferable(nInCount, pInMimeTypes, pInSizes, pInStreams));
+
+    auto xClip = forceSetClipboardForCurrentView(pThis);
+    xClip->setContents(xTransferable, uno::Reference<datatransfer::clipboard::XClipboardOwner>());
+
+    SAL_INFO("lok", "Set clip: " << xClip.get() << " to: " << xTransferable);
+
+    if (!pDoc->isMimeTypeSupported())
+    {
+        SetLastExceptionMsg("Document doesn't support this mime type");
+        return false;
+    }
+#endif
+    return true;
+}
+
+static bool doc_paste(LibreOfficeKitDocument* pThis, const char* pMimeType, const char* pData, size_t nSize)
+{
+    comphelper::ProfileZone aZone("doc_paste");
+
+    SolarMutexGuard aGuard;
+
+    const char *pInMimeTypes[1];
+    const char *pInStreams[1];
+    size_t pInSizes[1];
+    pInMimeTypes[0] = pMimeType;
+    pInSizes[0] = nSize;
+    pInStreams[0] = pData;
+
+    if (!doc_setClipboard(pThis, 1, pInMimeTypes, pInSizes, pInStreams))
+        return false;
+
+    uno::Sequence<beans::PropertyValue> aPropertyValues(comphelper::InitPropertySequence(
+    {
+        {"AnchorType", uno::Any(static_cast<sal_uInt16>(css::text::TextContentAnchorType_AS_CHARACTER))},
+        {"IgnoreComments", uno::Any(true)},
+    }));
+    if (!comphelper::dispatchCommand(".uno:Paste", aPropertyValues))
+    {
+        SetLastExceptionMsg("Failed to dispatch the .uno: command");
+        return false;
+    }
+
+    return true;
+}
+
+static void doc_setGraphicSelection(LibreOfficeKitDocument* pThis, int nType, int nX, int nY)
+{
+    comphelper::ProfileZone aZone("doc_setGraphicSelection");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+    pDoc->setGraphicSelection(nType, nX, nY);
+}
+
+static void doc_resetSelection(LibreOfficeKitDocument* pThis)
+{
+    comphelper::ProfileZone aZone("doc_resetSelection");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+    pDoc->resetSelection();
+}
+
+static char* getLanguages(const char* pCommand)
+{
+    css::uno::Sequence< css::lang::Locale > aLocales;
+
+    if (xContext.is())
+    {
+        css::uno::Reference<css::linguistic2::XLinguServiceManager2> xLangSrv = css::linguistic2::LinguServiceManager::create(xContext);
+        if (xLangSrv.is())
+        {
+            css::uno::Reference<css::linguistic2::XSpellChecker> xSpell = xLangSrv->getSpellChecker();
+            if (xSpell.is())
+                aLocales = xSpell->getLocales();
+        }
+    }
+
+    boost::property_tree::ptree aTree;
+    aTree.put("commandName", pCommand);
+    boost::property_tree::ptree aValues;
+    boost::property_tree::ptree aChild;
+    OUString sLanguage;
+    for ( css::lang::Locale const & locale : std::as_const(aLocales) )
+    {
+        const LanguageTag aLanguageTag( locale );
+        sLanguage = SvtLanguageTable::GetLanguageString(aLanguageTag.getLanguageType());
+        if (sLanguage.startsWith("{") && sLanguage.endsWith("}"))
+            continue;
+
+        sLanguage += ";" + aLanguageTag.getBcp47(false);
+        aChild.put("", sLanguage.toUtf8());
+        aValues.push_back(std::make_pair("", aChild));
+    }
+    aTree.add_child("commandValues", aValues);
+    std::stringstream aStream;
+    boost::property_tree::write_json(aStream, aTree);
+    char* pJson = static_cast<char*>(malloc(aStream.str().size() + 1));
+    assert(pJson); // Don't handle OOM conditions
+    strcpy(pJson, aStream.str().c_str());
+    pJson[aStream.str().size()] = '\0';
+    return pJson;
+}
+
+static char* getFonts (const char* pCommand)
+{
+    SfxObjectShell* pDocSh = SfxObjectShell::Current();
+    if (!pDocSh)
+        return nullptr;
+    const SvxFontListItem* pFonts = static_cast<const SvxFontListItem*>(
+        pDocSh->GetItem(SID_ATTR_CHAR_FONTLIST));
+    const FontList* pList = pFonts ? pFonts->GetFontList() : nullptr;
+
+    boost::property_tree::ptree aTree;
+    aTree.put("commandName", pCommand);
+    boost::property_tree::ptree aValues;
+    if ( pList )
+    {
+        sal_uInt16 nFontCount = pList->GetFontNameCount();
+        for (sal_uInt16 i = 0; i < nFontCount; ++i)
+        {
+            boost::property_tree::ptree aChildren;
+            const FontMetric& rFontMetric = pList->GetFontName(i);
+            const int* pAry = FontList::GetStdSizeAry();
+            sal_uInt16 nSizeCount = 0;
+            while (pAry[nSizeCount])
+            {
+                boost::property_tree::ptree aChild;
+                aChild.put("", static_cast<float>(pAry[nSizeCount]) / 10);
+                aChildren.push_back(std::make_pair("", aChild));
+                nSizeCount++;
+            }
+            aValues.add_child(rFontMetric.GetFamilyName().toUtf8().getStr(), aChildren);
+        }
+    }
+    aTree.add_child("commandValues", aValues);
+    std::stringstream aStream;
+    boost::property_tree::write_json(aStream, aTree);
+    char* pJson = static_cast<char*>(malloc(aStream.str().size() + 1));
+    assert(pJson); // Don't handle OOM conditions
+    strcpy(pJson, aStream.str().c_str());
+    pJson[aStream.str().size()] = '\0';
+    return pJson;
+}
+
+static char* getFontSubset (std::string_view aFontName)
+{
+    OUString aFoundFont(::rtl::Uri::decode(OStringToOUString(aFontName, RTL_TEXTENCODING_UTF8), rtl_UriDecodeStrict, RTL_TEXTENCODING_UTF8));
+
+    boost::property_tree::ptree aTree;
+    aTree.put("commandName", ".uno:FontSubset");
+    boost::property_tree::ptree aValues;
+
+    if (const vcl::Font* pFont = FindFont(aFoundFont))
+    {
+        FontCharMapRef xFontCharMap (new FontCharMap());
+        auto aDevice(VclPtr<VirtualDevice>::Create(DeviceFormat::DEFAULT));
+
+        aDevice->SetFont(*pFont);
+        aDevice->GetFontCharMap(xFontCharMap);
+        SubsetMap aSubMap(xFontCharMap);
+
+        for (auto const& subset : aSubMap.GetSubsetMap())
+        {
+            boost::property_tree::ptree aChild;
+            aChild.put("", static_cast<int>(ublock_getCode(subset.GetRangeMin())));
+            aValues.push_back(std::make_pair("", aChild));
+        }
+    }
+
+    aTree.add_child("commandValues", aValues);
+    std::stringstream aStream;
+    boost::property_tree::write_json(aStream, aTree);
+    char* pJson = static_cast<char*>(malloc(aStream.str().size() + 1));
+    assert(pJson); // Don't handle OOM conditions
+    strcpy(pJson, aStream.str().c_str());
+    pJson[aStream.str().size()] = '\0';
+    return pJson;
+}
+
+static char* getStyles(LibreOfficeKitDocument* pThis, const char* pCommand)
+{
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    boost::property_tree::ptree aTree;
+    aTree.put("commandName", pCommand);
+    uno::Reference<css::style::XStyleFamiliesSupplier> xStyleFamiliesSupplier(pDocument->mxComponent, uno::UNO_QUERY);
+    const uno::Reference<container::XNameAccess> xStyleFamilies = xStyleFamiliesSupplier->getStyleFamilies();
+    const uno::Sequence<OUString> aStyleFamilies = xStyleFamilies->getElementNames();
+
+    static const std::vector<OUString> aWriterStyles =
+    {
+        "Text body",
+        "Quotations",
+        "Title",
+        "Subtitle",
+        "Heading 1",
+        "Heading 2",
+        "Heading 3"
+    };
+
+    // We need to keep a list of the default style names
+    // in order to filter these out later when processing
+    // the full list of styles.
+    std::set<OUString> aDefaultStyleNames;
+
+    boost::property_tree::ptree aValues;
+    for (OUString const & sStyleFam : aStyleFamilies)
+    {
+        boost::property_tree::ptree aChildren;
+        uno::Reference<container::XNameAccess> xStyleFamily(xStyleFamilies->getByName(sStyleFam), uno::UNO_QUERY);
+
+        // Writer provides a huge number of styles, we have a list of 7 "default" styles which
+        // should be shown in the normal dropdown, which we should add to the start of the list
+        // to simplify their selection.
+        if (sStyleFam == "ParagraphStyles"
+            && doc_getDocumentType(pThis) == LOK_DOCTYPE_TEXT)
+        {
+            for (const OUString& rStyle: aWriterStyles)
+            {
+                aDefaultStyleNames.insert( rStyle );
+
+                boost::property_tree::ptree aChild;
+                aChild.put("", rStyle.toUtf8());
+                aChildren.push_back(std::make_pair("", aChild));
+            }
+        }
+
+        const uno::Sequence<OUString> aStyles = xStyleFamily->getElementNames();
+        for (const OUString& rStyle: aStyles )
+        {
+            // Filter out the default styles - they are already at the top
+            // of the list
+            if (aDefaultStyleNames.find(rStyle) == aDefaultStyleNames.end() ||
+                (sStyleFam != "ParagraphStyles" || doc_getDocumentType(pThis) != LOK_DOCTYPE_TEXT) )
+            {
+                boost::property_tree::ptree aChild;
+                aChild.put("", rStyle.toUtf8());
+                aChildren.push_back(std::make_pair("", aChild));
+            }
+        }
+        aValues.add_child(sStyleFam.toUtf8().getStr(), aChildren);
+    }
+
+    // Header & Footer Styles
+    {
+        boost::property_tree::ptree aChild;
+        boost::property_tree::ptree aChildren;
+        static const OUStringLiteral sPageStyles(u"PageStyles");
+        uno::Reference<beans::XPropertySet> xProperty;
+        uno::Reference<container::XNameContainer> xContainer;
+
+        if (xStyleFamilies->hasByName(sPageStyles) && (xStyleFamilies->getByName(sPageStyles) >>= xContainer))
+        {
+            const uno::Sequence<OUString> aSeqNames = xContainer->getElementNames();
+            for (OUString const & sName : aSeqNames)
+            {
+                bool bIsPhysical;
+                xProperty.set(xContainer->getByName(sName), uno::UNO_QUERY);
+                if (xProperty.is() && (xProperty->getPropertyValue("IsPhysical") >>= bIsPhysical) && bIsPhysical)
+                {
+                    OUString displayName;
+                    xProperty->getPropertyValue("DisplayName") >>= displayName;
+                    aChild.put("", displayName.toUtf8());
+                    aChildren.push_back(std::make_pair("", aChild));
+                }
+            }
+            aValues.add_child("HeaderFooter", aChildren);
+        }
+    }
+
+    {
+        boost::property_tree::ptree aCommandList;
+
+        {
+            boost::property_tree::ptree aChild;
+
+            OUString sClearFormat = SvxResId(RID_SVXSTR_CLEARFORM);
+
+            boost::property_tree::ptree aName;
+            aName.put("", sClearFormat.toUtf8());
+            aChild.push_back(std::make_pair("text", aName));
+
+            boost::property_tree::ptree aCommand;
+            aCommand.put("", ".uno:ResetAttributes");
+            aChild.push_back(std::make_pair("id", aCommand));
+
+            aCommandList.push_back(std::make_pair("", aChild));
+        }
+
+        aValues.add_child("Commands", aCommandList);
+    }
+
+    aTree.add_child("commandValues", aValues);
+    std::stringstream aStream;
+    boost::property_tree::write_json(aStream, aTree);
+    char* pJson = static_cast<char*>(malloc(aStream.str().size() + 1));
+    assert(pJson); // Don't handle OOM conditions
+    strcpy(pJson, aStream.str().c_str());
+    pJson[aStream.str().size()] = '\0';
+    return pJson;
+}
+
+namespace {
+
+enum class UndoOrRedo
+{
+    UNDO,
+    REDO
+};
+
+}
+
+/// Returns the JSON representation of either an undo or a redo stack.
+static char* getUndoOrRedo(LibreOfficeKitDocument* pThis, UndoOrRedo eCommand)
+{
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    auto pBaseModel = dynamic_cast<SfxBaseModel*>(pDocument->mxComponent.get());
+    if (!pBaseModel)
+        return nullptr;
+
+    SfxObjectShell* pObjectShell = pBaseModel->GetObjectShell();
+    if (!pObjectShell)
+        return nullptr;
+
+    SfxUndoManager* pUndoManager = pObjectShell->GetUndoManager();
+    if (!pUndoManager)
+        return nullptr;
+
+    OUString aString;
+    if (eCommand == UndoOrRedo::UNDO)
+        aString = pUndoManager->GetUndoActionsInfo();
+    else
+        aString = pUndoManager->GetRedoActionsInfo();
+    char* pJson = strdup(aString.toUtf8().getStr());
+    return pJson;
+}
+
+/// Returns the JSON representation of the redline stack.
+static char* getTrackedChanges(LibreOfficeKitDocument* pThis)
+{
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    uno::Reference<document::XRedlinesSupplier> xRedlinesSupplier(pDocument->mxComponent, uno::UNO_QUERY);
+    tools::JsonWriter aJson;
+    // We want positions of the track changes also which is not possible from
+    // UNO. Enable positioning information for text documents only for now, so
+    // construct the tracked changes JSON from inside the sw/, not here using UNO
+    if (doc_getDocumentType(pThis) != LOK_DOCTYPE_TEXT && xRedlinesSupplier.is())
+    {
+        auto redlinesNode = aJson.startArray("redlines");
+        uno::Reference<container::XEnumeration> xRedlines = xRedlinesSupplier->getRedlines()->createEnumeration();
+        for (size_t nIndex = 0; xRedlines->hasMoreElements(); ++nIndex)
+        {
+            uno::Reference<beans::XPropertySet> xRedline(xRedlines->nextElement(), uno::UNO_QUERY);
+            auto redlineNode = aJson.startStruct();
+            aJson.put("index", static_cast<sal_Int32>(nIndex));
+
+            OUString sAuthor;
+            xRedline->getPropertyValue("RedlineAuthor") >>= sAuthor;
+            aJson.put("author", sAuthor);
+
+            OUString sType;
+            xRedline->getPropertyValue("RedlineType") >>= sType;
+            aJson.put("type", sType);
+
+            OUString sComment;
+            xRedline->getPropertyValue("RedlineComment") >>= sComment;
+            aJson.put("comment", sComment);
+
+            OUString sDescription;
+            xRedline->getPropertyValue("RedlineDescription") >>= sDescription;
+            aJson.put("description", sDescription);
+
+            util::DateTime aDateTime;
+            xRedline->getPropertyValue("RedlineDateTime") >>= aDateTime;
+            OUString sDateTime = utl::toISO8601(aDateTime);
+            aJson.put("dateTime", sDateTime);
+        }
+    }
+    else
+    {
+        ITiledRenderable* pDoc = getTiledRenderable(pThis);
+        if (!pDoc)
+        {
+            SetLastExceptionMsg("Document doesn't support tiled rendering");
+            return nullptr;
+        }
+        pDoc->getTrackedChanges(aJson);
+    }
+
+    return aJson.extractData();
+}
+
+
+/// Returns the JSON representation of the redline author table.
+static char* getTrackedChangeAuthors(LibreOfficeKitDocument* pThis)
+{
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return nullptr;
+    }
+    tools::JsonWriter aJsonWriter;
+    pDoc->getTrackedChangeAuthors(aJsonWriter);
+    return aJsonWriter.extractData();
+}
+
+static char* doc_getCommandValues(LibreOfficeKitDocument* pThis, const char* pCommand)
+{
+    comphelper::ProfileZone aZone("doc_getCommandValues");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    const std::string_view aCommand(pCommand);
+    static constexpr OStringLiteral aViewRowColumnHeaders(".uno:ViewRowColumnHeaders");
+    static constexpr OStringLiteral aSheetGeometryData(".uno:SheetGeometryData");
+    static constexpr OStringLiteral aCellCursor(".uno:CellCursor");
+    static constexpr OStringLiteral aFontSubset(".uno:FontSubset&name=");
+
+    if (!strcmp(pCommand, ".uno:LanguageStatus"))
+    {
+        return getLanguages(pCommand);
+    }
+    else if (!strcmp(pCommand, ".uno:CharFontName"))
+    {
+        return getFonts(pCommand);
+    }
+    else if (!strcmp(pCommand, ".uno:StyleApply"))
+    {
+        return getStyles(pThis, pCommand);
+    }
+    else if (aCommand == ".uno:Undo")
+    {
+        return getUndoOrRedo(pThis, UndoOrRedo::UNDO);
+    }
+    else if (aCommand == ".uno:Redo")
+    {
+        return getUndoOrRedo(pThis, UndoOrRedo::REDO);
+    }
+    else if (aCommand == ".uno:AcceptTrackedChanges")
+    {
+        return getTrackedChanges(pThis);
+    }
+    else if (aCommand == ".uno:TrackedChangeAuthors")
+    {
+        return getTrackedChangeAuthors(pThis);
+    }
+    else if (aCommand == ".uno:ViewAnnotations")
+    {
+        return getPostIts(pThis);
+    }
+    else if (aCommand == ".uno:ViewAnnotationsPosition")
+    {
+        return getPostItsPos(pThis);
+    }
+    else if (aCommand == ".uno:RulerState")
+    {
+        return getRulerState(pThis);
+    }
+    else if (o3tl::starts_with(aCommand, aViewRowColumnHeaders))
+    {
+        ITiledRenderable* pDoc = getTiledRenderable(pThis);
+        if (!pDoc)
+        {
+            SetLastExceptionMsg("Document doesn't support tiled rendering");
+            return nullptr;
+        }
+
+        tools::Rectangle aRectangle;
+        if (aCommand.size() > o3tl::make_unsigned(aViewRowColumnHeaders.getLength()))
+        {
+            // Command has parameters.
+            int nX = 0;
+            int nY = 0;
+            int nWidth = 0;
+            int nHeight = 0;
+            std::string_view aArguments = aCommand.substr(aViewRowColumnHeaders.getLength() + 1);
+            sal_Int32 nParamIndex = 0;
+            do
+            {
+                std::string_view aParamToken = o3tl::getToken(aArguments, 0, '&', nParamIndex);
+                sal_Int32 nIndex = 0;
+                std::string_view aKey;
+                std::string_view aValue;
+                do
+                {
+                    std::string_view aToken = o3tl::getToken(aParamToken, 0, '=', nIndex);
+                    if (aKey.empty())
+                        aKey = aToken;
+                    else
+                        aValue = aToken;
+                }
+                while (nIndex >= 0);
+                if (aKey == "x")
+                    nX = o3tl::toInt32(aValue);
+                else if (aKey == "y")
+                    nY = o3tl::toInt32(aValue);
+                else if (aKey == "width")
+                    nWidth = o3tl::toInt32(aValue);
+                else if (aKey == "height")
+                    nHeight = o3tl::toInt32(aValue);
+            }
+            while (nParamIndex >= 0);
+
+            aRectangle = tools::Rectangle(nX, nY, nX + nWidth, nY + nHeight);
+        }
+
+        tools::JsonWriter aJsonWriter;
+        pDoc->getRowColumnHeaders(aRectangle, aJsonWriter);
+        return aJsonWriter.extractData();
+    }
+    else if (o3tl::starts_with(aCommand, aSheetGeometryData))
+    {
+        ITiledRenderable* pDoc = getTiledRenderable(pThis);
+        if (!pDoc)
+        {
+            SetLastExceptionMsg("Document doesn't support tiled rendering");
+            return nullptr;
+        }
+
+        bool bColumns = true;
+        bool bRows = true;
+        bool bSizes = true;
+        bool bHidden = true;
+        bool bFiltered = true;
+        bool bGroups = true;
+        if (aCommand.size() > o3tl::make_unsigned(aSheetGeometryData.getLength()))
+        {
+            bColumns = bRows = bSizes = bHidden = bFiltered = bGroups = false;
+
+            std::string_view aArguments = aCommand.substr(aSheetGeometryData.getLength() + 1);
+            sal_Int32 nParamIndex = 0;
+            do
+            {
+                std::string_view aParamToken = o3tl::getToken(aArguments, 0, '&', nParamIndex);
+                sal_Int32 nIndex = 0;
+                std::string_view aKey;
+                std::string_view aValue;
+                do
+                {
+                    std::string_view aToken = o3tl::getToken(aParamToken, 0, '=', nIndex);
+                    if (aKey.empty())
+                        aKey = aToken;
+                    else
+                        aValue = aToken;
+
+                } while (nIndex >= 0);
+
+                bool bEnableFlag = aValue.empty() ||
+                    o3tl::equalsIgnoreAsciiCase(aValue, "true") || o3tl::toInt32(aValue) > 0;
+                if (!bEnableFlag)
+                    continue;
+
+                if (aKey == "columns")
+                    bColumns = true;
+                else if (aKey == "rows")
+                    bRows = true;
+                else if (aKey == "sizes")
+                    bSizes = true;
+                else if (aKey == "hidden")
+                    bHidden = true;
+                else if (aKey == "filtered")
+                    bFiltered = true;
+                else if (aKey == "groups")
+                    bGroups = true;
+
+            } while (nParamIndex >= 0);
+        }
+
+        OString aGeomDataStr
+            = pDoc->getSheetGeometryData(bColumns, bRows, bSizes, bHidden, bFiltered, bGroups);
+
+        if (aGeomDataStr.isEmpty())
+            return nullptr;
+
+        return convertOString(aGeomDataStr);
+    }
+    else if (o3tl::starts_with(aCommand, aCellCursor))
+    {
+        ITiledRenderable* pDoc = getTiledRenderable(pThis);
+        if (!pDoc)
+        {
+            SetLastExceptionMsg("Document doesn't support tiled rendering");
+            return nullptr;
+        }
+        // Ignore command's deprecated parameters.
+        tools::JsonWriter aJsonWriter;
+        pDoc->getCellCursor(aJsonWriter);
+        return aJsonWriter.extractData();
+    }
+    else if (o3tl::starts_with(aCommand, aFontSubset))
+    {
+        return getFontSubset(aCommand.substr(aFontSubset.getLength()));
+    }
+    else
+    {
+        SetLastExceptionMsg("Unknown command, no values returned");
+        return nullptr;
+    }
+}
+
+static void doc_setClientZoom(LibreOfficeKitDocument* pThis, int nTilePixelWidth, int nTilePixelHeight,
+        int nTileTwipWidth, int nTileTwipHeight)
+{
+    comphelper::ProfileZone aZone("doc_setClientZoom");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+    pDoc->setClientZoom(nTilePixelWidth, nTilePixelHeight, nTileTwipWidth, nTileTwipHeight);
+}
+
+static void doc_setClientVisibleArea(LibreOfficeKitDocument* pThis, int nX, int nY, int nWidth, int nHeight)
+{
+    comphelper::ProfileZone aZone("doc_setClientVisibleArea");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+    tools::Rectangle aRectangle(Point(nX, nY), Size(nWidth, nHeight));
+    pDoc->setClientVisibleArea(aRectangle);
+}
+
+static void doc_setOutlineState(LibreOfficeKitDocument* pThis, bool bColumn, int nLevel, int nIndex, bool bHidden)
+{
+    comphelper::ProfileZone aZone("doc_setOutlineState");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+    pDoc->setOutlineState(bColumn, nLevel, nIndex, bHidden);
+}
+
+static int doc_createViewWithOptions(LibreOfficeKitDocument* pThis,
+                                     const char* pOptions)
+{
+    comphelper::ProfileZone aZone("doc_createView");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    OUString aOptions = getUString(pOptions);
+    const OUString aLanguage = extractParameter(aOptions, u"Language");
+
+    if (!aLanguage.isEmpty())
+    {
+        // Set the LOK language tag, used for dialog tunneling.
+        comphelper::LibreOfficeKit::setLanguageTag(LanguageTag(aLanguage));
+        comphelper::LibreOfficeKit::setLocale(LanguageTag(aLanguage));
+    }
+
+    const OUString aDeviceFormFactor = extractParameter(aOptions, u"DeviceFormFactor");
+    SfxLokHelper::setDeviceFormFactor(aDeviceFormFactor);
+
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+    const int nId = SfxLokHelper::createView(pDocument->mnDocumentId);
+
+    vcl::lok::numberOfViewsChanged(SfxLokHelper::getViewsCount(pDocument->mnDocumentId));
+
+#ifdef IOS
+    (void) pThis;
+#else
+    forceSetClipboardForCurrentView(pThis);
+#endif
+
+    return nId;
+}
+
+static int doc_createView(LibreOfficeKitDocument* pThis)
+{
+    return doc_createViewWithOptions(pThis, nullptr); // No options.
+}
+
+static void doc_destroyView(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* pThis, int nId)
+{
+    comphelper::ProfileZone aZone("doc_destroyView");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+#ifndef IOS
+    LOKClipboardFactory::releaseClipboardForView(nId);
+#endif
+
+    SfxLokHelper::destroyView(nId);
+
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+    vcl::lok::numberOfViewsChanged(SfxLokHelper::getViewsCount(pDocument->mnDocumentId));
+}
+
+static void doc_setView(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/, int nId)
+{
+    comphelper::ProfileZone aZone("doc_setView");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    SfxLokHelper::setView(nId);
+}
+
+static int doc_getView(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/)
+{
+    comphelper::ProfileZone aZone("doc_getView");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    return SfxLokHelper::getView();
+}
+
+static int doc_getViewsCount(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* pThis)
+{
+    comphelper::ProfileZone aZone("doc_getViewsCount");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+    return SfxLokHelper::getViewsCount(pDocument->mnDocumentId);
+}
+
+static bool doc_getViewIds(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* pThis, int* pArray, size_t nSize)
+{
+    comphelper::ProfileZone aZone("doc_getViewsIds");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+    return SfxLokHelper::getViewIds(pDocument->mnDocumentId, pArray, nSize);
+}
+
+static void doc_setViewLanguage(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/, int nId, const char* language)
+{
+    comphelper::ProfileZone aZone("doc_setViewLanguage");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    OUString sLanguage = OStringToOUString(language, RTL_TEXTENCODING_UTF8);
+    SfxLokHelper::setViewLanguage(nId, sLanguage);
+    SfxLokHelper::setViewLocale(nId, sLanguage);
+}
+
+
+
+unsigned char* doc_renderFont(LibreOfficeKitDocument* pThis,
+                              const char* pFontName,
+                              const char* pChar,
+                              int* pFontWidth,
+                              int* pFontHeight)
+{
+    return doc_renderFontOrientation(pThis, pFontName, pChar, pFontWidth, pFontHeight, 0);
+}
+
+unsigned char* doc_renderFontOrientation(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/,
+                              const char* pFontName,
+                              const char* pChar,
+                              int* pFontWidth,
+                              int* pFontHeight,
+                              int pOrientation)
+{
+    comphelper::ProfileZone aZone("doc_renderFont");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    const int nDefaultFontSize = 25;
+
+    auto aFont = FindFont_FallbackToDefault(OStringToOUString(pFontName, RTL_TEXTENCODING_UTF8));
+
+    OUString aText(OStringToOUString(pChar, RTL_TEXTENCODING_UTF8));
+    if (aText.isEmpty())
+        aText = aFont.GetFamilyName();
+
+    auto aDevice(VclPtr<VirtualDevice>::Create(DeviceFormat::DEFAULT));
+    ::tools::Rectangle aRect;
+    aFont.SetFontSize(Size(0, nDefaultFontSize));
+    aFont.SetOrientation(Degree10(pOrientation));
+    aDevice->SetFont(aFont);
+    aDevice->GetTextBoundRect(aRect, aText);
+    if (aRect.IsEmpty())
+        return nullptr;
+
+    int nFontWidth = aRect.Right() + 1;
+    int nFontHeight = aRect.Bottom() + 1;
+
+    if (nFontWidth <= 0 || nFontHeight <= 0)
+        return nullptr;
+
+    if (*pFontWidth > 0 && *pFontHeight > 0)
+    {
+        double fScaleX = *pFontWidth / static_cast<double>(nFontWidth) / 1.5;
+        double fScaleY = *pFontHeight / static_cast<double>(nFontHeight) / 1.5;
+
+        double fScale = std::min(fScaleX, fScaleY);
+
+        if (fScale >= 1.0)
+        {
+            int nFontSize = fScale * nDefaultFontSize;
+            aFont.SetFontSize(Size(0, nFontSize));
+            aDevice->SetFont(aFont);
+        }
+
+        aRect = tools::Rectangle(0, 0, *pFontWidth, *pFontHeight);
+
+        nFontWidth = *pFontWidth;
+        nFontHeight = *pFontHeight;
+
+    }
+
+    unsigned char* pBuffer = static_cast<unsigned char*>(malloc(4 * nFontWidth * nFontHeight));
+    if (!pBuffer)
+        return nullptr;
+
+    memset(pBuffer, 0, nFontWidth * nFontHeight * 4);
+    aDevice->SetBackground(Wallpaper(COL_TRANSPARENT));
+    aDevice->SetOutputSizePixelScaleOffsetAndLOKBuffer(
+                Size(nFontWidth, nFontHeight), Fraction(1.0), Point(),
+                pBuffer);
+
+    if (*pFontWidth > 0 && *pFontHeight > 0)
+    {
+        DrawTextFlags const nStyle =
+                DrawTextFlags::Center
+                | DrawTextFlags::VCenter
+                | DrawTextFlags::MultiLine
+                | DrawTextFlags::WordBreak;// | DrawTextFlags::WordBreakHyphenation ;
+
+        aDevice->DrawText(aRect, aText, nStyle);
+    }
+    else
+    {
+        *pFontWidth = nFontWidth;
+        *pFontHeight = nFontHeight;
+
+        aDevice->DrawText(Point(0,0), aText);
+    }
+
+
+    return pBuffer;
+}
+
+
+static void doc_paintWindow(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId,
+                            unsigned char* pBuffer,
+                            const int nX, const int nY,
+                            const int nWidth, const int nHeight)
+{
+    doc_paintWindowDPI(pThis, nLOKWindowId, pBuffer, nX, nY, nWidth, nHeight, 1.0);
+}
+
+static void doc_paintWindowDPI(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId,
+                               unsigned char* pBuffer,
+                               const int nX, const int nY,
+                               const int nWidth, const int nHeight,
+                               const double fDPIScale)
+{
+    doc_paintWindowForView(pThis, nLOKWindowId, pBuffer, nX, nY, nWidth, nHeight, fDPIScale, -1);
+}
+
+static void doc_paintWindowForView(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId,
+                                   unsigned char* pBuffer, const int nX, const int nY,
+                                   const int nWidth, const int nHeight,
+                                   const double fDPIScale, int viewId)
+{
+    comphelper::ProfileZone aZone("doc_paintWindowDPI");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
+    if (!pWindow)
+    {
+        SetLastExceptionMsg("Document doesn't support dialog rendering, or window not found.");
+        return;
+    }
+
+    // Used to avoid work in setView if set.
+    comphelper::LibreOfficeKit::setDialogPainting(true);
+
+    if (viewId >= 0)
+        doc_setView(pThis, viewId);
+
+    // Setup cairo (or CoreGraphics, in the iOS case) to draw with the changed DPI scale (and return
+    // back to 1.0 when the painting finishes)
+    comphelper::ScopeGuard dpiScaleGuard([]() { comphelper::LibreOfficeKit::setDPIScale(1.0); });
+    comphelper::LibreOfficeKit::setDPIScale(fDPIScale);
+
+#if defined(IOS)
+
+    CGContextRef cgc = CGBitmapContextCreate(pBuffer, nWidth, nHeight, 8, nWidth*4, CGColorSpaceCreateDeviceRGB(), kCGImageAlphaNoneSkipFirst | kCGImageByteOrder32Little);
+
+    CGContextTranslateCTM(cgc, 0, nHeight);
+    CGContextScaleCTM(cgc, fDPIScale, -fDPIScale);
+
+    SystemGraphicsData aData;
+    aData.rCGContext = cgc;
+
+    ScopedVclPtrInstance<VirtualDevice> pDevice(aData, Size(1, 1), DeviceFormat::DEFAULT);
+    pDevice->SetBackground(Wallpaper(COL_TRANSPARENT));
+
+    pDevice->SetOutputSizePixel(Size(nWidth, nHeight));
+
+    MapMode aMapMode(pDevice->GetMapMode());
+    aMapMode.SetOrigin(Point(-(nX / fDPIScale), -(nY / fDPIScale)));
+    pDevice->SetMapMode(aMapMode);
+
+    pWindow->PaintToDevice(pDevice.get(), Point(0, 0));
+
+    CGContextRelease(cgc);
+
+#else
+
+    ScopedVclPtrInstance<VirtualDevice> pDevice(DeviceFormat::DEFAULT);
+    pDevice->SetBackground(Wallpaper(COL_TRANSPARENT));
+
+    pDevice->SetOutputSizePixelScaleOffsetAndLOKBuffer(Size(nWidth, nHeight), Fraction(1.0), Point(), pBuffer);
+
+    MapMode aMapMode(pDevice->GetMapMode());
+    aMapMode.SetOrigin(Point(-(nX / fDPIScale), -(nY / fDPIScale)));
+    pDevice->SetMapMode(aMapMode);
+
+    pWindow->PaintToDevice(pDevice.get(), Point(0, 0));
+#endif
+
+    comphelper::LibreOfficeKit::setDialogPainting(false);
+}
+
+static void doc_postWindow(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId, int nAction, const char* pData)
+{
+    comphelper::ProfileZone aZone("doc_postWindow");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
+    if (!pWindow)
+    {
+        SetLastExceptionMsg("Document doesn't support dialog rendering, or window not found.");
+        return;
+    }
+
+    if (nAction == LOK_WINDOW_CLOSE)
+    {
+        vcl::CloseTopLevel(pWindow);
+    }
+    else if (nAction == LOK_WINDOW_PASTE)
+    {
+#ifndef IOS
+        OUString aMimeType;
+        css::uno::Sequence<sal_Int8> aData;
+        std::vector<beans::PropertyValue> aArgs(jsonToPropertyValuesVector(pData));
+        {
+            aArgs.size() == 2 &&
+            aArgs[0].Name == "MimeType" && (aArgs[0].Value >>= aMimeType) &&
+            aArgs[1].Name == "Data" && (aArgs[1].Value >>= aData);
+        }
+
+        if (!aMimeType.isEmpty() && aData.hasElements())
+        {
+            uno::Reference<datatransfer::XTransferable> xTransferable(new LOKTransferable(aMimeType, aData));
+            uno::Reference<datatransfer::clipboard::XClipboard> xClipboard(new LOKClipboard);
+            xClipboard->setContents(xTransferable, uno::Reference<datatransfer::clipboard::XClipboardOwner>());
+            pWindow->SetClipboard(xClipboard);
+
+            KeyEvent aEvent(0, KEY_PASTE, 0);
+            Application::PostKeyEvent(VclEventId::WindowKeyInput, pWindow, &aEvent);
+        }
+        else
+            SetLastExceptionMsg("Window command 'paste': wrong parameters.");
+#else
+        (void) pData;
+        assert(!"doc_postWindow() with LOK_WINDOW_PASTE should not be called on iOS");
+#endif
+    }
+}
+
+// CERTIFICATE AND DOCUMENT SIGNING
+static bool doc_insertCertificate(LibreOfficeKitDocument* pThis,
+                                  const unsigned char* pCertificateBinary, const int nCertificateBinarySize,
+                                  const unsigned char* pPrivateKeyBinary, const int nPrivateKeySize)
+{
+    comphelper::ProfileZone aZone("doc_insertCertificate");
+
+    if (!xContext.is())
+        return false;
+
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    if (!pDocument->mxComponent.is())
+        return false;
+
+    SfxBaseModel* pBaseModel = dynamic_cast<SfxBaseModel*>(pDocument->mxComponent.get());
+    if (!pBaseModel)
+        return false;
+
+    SfxObjectShell* pObjectShell = pBaseModel->GetObjectShell();
+
+    if (!pObjectShell)
+        return false;
+
+    uno::Reference<xml::crypto::XSEInitializer> xSEInitializer = xml::crypto::SEInitializer::create(xContext);
+    uno::Reference<xml::crypto::XXMLSecurityContext> xSecurityContext = xSEInitializer->createSecurityContext(OUString());
+    if (!xSecurityContext.is())
+        return false;
+
+    uno::Reference<xml::crypto::XSecurityEnvironment> xSecurityEnvironment = xSecurityContext->getSecurityEnvironment();
+    uno::Reference<xml::crypto::XCertificateCreator> xCertificateCreator(xSecurityEnvironment, uno::UNO_QUERY);
+
+    if (!xCertificateCreator.is())
+        return false;
+
+    uno::Sequence<sal_Int8> aCertificateSequence;
+
+    std::string aCertificateString(reinterpret_cast<const char*>(pCertificateBinary), nCertificateBinarySize);
+    std::string aCertificateBase64String = extractCertificate(aCertificateString);
+    if (!aCertificateBase64String.empty())
+    {
+        OUString aBase64OUString = OUString::createFromAscii(aCertificateBase64String.c_str());
+        comphelper::Base64::decode(aCertificateSequence, aBase64OUString);
+    }
+    else
+    {
+        aCertificateSequence.realloc(nCertificateBinarySize);
+        std::copy(pCertificateBinary, pCertificateBinary + nCertificateBinarySize, aCertificateSequence.getArray());
+    }
+
+    uno::Sequence<sal_Int8> aPrivateKeySequence;
+    std::string aPrivateKeyString(reinterpret_cast<const char*>(pPrivateKeyBinary), nPrivateKeySize);
+    std::string aPrivateKeyBase64String = extractPrivateKey(aPrivateKeyString);
+    if (!aPrivateKeyBase64String.empty())
+    {
+        OUString aBase64OUString = OUString::createFromAscii(aPrivateKeyBase64String.c_str());
+        comphelper::Base64::decode(aPrivateKeySequence, aBase64OUString);
+    }
+    else
+    {
+        aPrivateKeySequence.realloc(nPrivateKeySize);
+        std::copy(pPrivateKeyBinary, pPrivateKeyBinary + nPrivateKeySize, aPrivateKeySequence.getArray());
+    }
+
+    uno::Reference<security::XCertificate> xCertificate = xCertificateCreator->createDERCertificateWithPrivateKey(aCertificateSequence, aPrivateKeySequence);
+
+    if (!xCertificate.is())
+        return false;
+
+    SolarMutexGuard aGuard;
+
+    return pObjectShell->SignDocumentContentUsingCertificate(xCertificate);
+}
+
+static bool doc_addCertificate(LibreOfficeKitDocument* pThis,
+                                  const unsigned char* pCertificateBinary, const int nCertificateBinarySize)
+{
+    comphelper::ProfileZone aZone("doc_addCertificate");
+
+    if (!xContext.is())
+        return false;
+
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    if (!pDocument->mxComponent.is())
+        return false;
+
+    SfxBaseModel* pBaseModel = dynamic_cast<SfxBaseModel*>(pDocument->mxComponent.get());
+    if (!pBaseModel)
+        return false;
+
+    SfxObjectShell* pObjectShell = pBaseModel->GetObjectShell();
+
+    if (!pObjectShell)
+        return false;
+
+    uno::Reference<xml::crypto::XSEInitializer> xSEInitializer = xml::crypto::SEInitializer::create(xContext);
+    uno::Reference<xml::crypto::XXMLSecurityContext> xSecurityContext = xSEInitializer->createSecurityContext(OUString());
+    if (!xSecurityContext.is())
+        return false;
+
+    uno::Reference<xml::crypto::XSecurityEnvironment> xSecurityEnvironment = xSecurityContext->getSecurityEnvironment();
+    uno::Reference<xml::crypto::XCertificateCreator> xCertificateCreator(xSecurityEnvironment, uno::UNO_QUERY);
+
+    if (!xCertificateCreator.is())
+        return false;
+
+    uno::Sequence<sal_Int8> aCertificateSequence;
+
+    std::string aCertificateString(reinterpret_cast<const char*>(pCertificateBinary), nCertificateBinarySize);
+    std::string aCertificateBase64String = extractCertificate(aCertificateString);
+    if (!aCertificateBase64String.empty())
+    {
+        OUString aBase64OUString = OUString::createFromAscii(aCertificateBase64String.c_str());
+        comphelper::Base64::decode(aCertificateSequence, aBase64OUString);
+    }
+    else
+    {
+        aCertificateSequence.realloc(nCertificateBinarySize);
+        std::copy(pCertificateBinary, pCertificateBinary + nCertificateBinarySize, aCertificateSequence.getArray());
+    }
+
+    uno::Reference<security::XCertificate> xCertificate = xCertificateCreator->addDERCertificateToTheDatabase(aCertificateSequence, "TCu,Cu,Tu");
+
+    if (!xCertificate.is())
+        return false;
+
+    SAL_INFO("lok", "Certificate Added = IssuerName: " << xCertificate->getIssuerName() << " SubjectName: " << xCertificate->getSubjectName());
+
+    return true;
+}
+
+static int doc_getSignatureState(LibreOfficeKitDocument* pThis)
+{
+    comphelper::ProfileZone aZone("doc_getSignatureState");
+
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    if (!pDocument->mxComponent.is())
+        return int(SignatureState::UNKNOWN);
+
+    SfxBaseModel* pBaseModel = dynamic_cast<SfxBaseModel*>(pDocument->mxComponent.get());
+    if (!pBaseModel)
+        return int(SignatureState::UNKNOWN);
+
+    SfxObjectShell* pObjectShell = pBaseModel->GetObjectShell();
+    if (!pObjectShell)
+        return int(SignatureState::UNKNOWN);
+
+    SolarMutexGuard aGuard;
+
+    pObjectShell->RecheckSignature(false);
+
+    return int(pObjectShell->GetDocumentSignatureState());
+}
+
+static void doc_resizeWindow(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId,
+                             const int nWidth, const int nHeight)
+{
+    SolarMutexGuard aGuard;
+    if (gImpl)
+        gImpl->maLastExceptionMsg.clear();
+
+    VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
+    if (!pWindow)
+    {
+        gImpl->maLastExceptionMsg = "Document doesn't support dialog resizing, or window not found.";
+        return;
+    }
+
+    pWindow->SetSizePixel(Size(nWidth, nHeight));
+}
+
+static void doc_completeFunction(LibreOfficeKitDocument* pThis, const char* pFunctionName)
+{
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+    pDoc->completeFunction(OUString::fromUtf8(pFunctionName));
+}
+
+
+static void doc_sendFormFieldEvent(LibreOfficeKitDocument* pThis, const char* pArguments)
+{
+    SolarMutexGuard aGuard;
+
+    // Supported in Writer only
+    if (doc_getDocumentType(pThis) != LOK_DOCTYPE_TEXT)
+            return;
+
+    StringMap aMap(jsdialog::jsonToStringMap(pArguments));
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering!");
+        return;
+    }
+
+    // Sanity check
+    if (aMap.find("type") == aMap.end() || aMap.find("cmd") == aMap.end())
+    {
+        SetLastExceptionMsg("Wrong arguments for sendFormFieldEvent!");
+        return;
+    }
+
+    pDoc->executeFromFieldEvent(aMap);
+}
+
+static bool doc_renderSearchResult(LibreOfficeKitDocument* pThis,
+                                     const char* pSearchResult, unsigned char** pBitmapBuffer,
+                                     int* pWidth, int* pHeight, size_t* pByteSize)
+{
+    if (doc_getDocumentType(pThis) != LOK_DOCTYPE_TEXT)
+        return false;
+
+    if (pBitmapBuffer == nullptr)
+        return false;
+
+    if (!pSearchResult || pSearchResult[0] == '\0')
+        return false;
+
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return false;
+    }
+
+    auto aRectangleVector = pDoc->getSearchResultRectangles(pSearchResult);
+
+    // combine into a rectangle union
+    basegfx::B2DRange aRangeUnion;
+    for (basegfx::B2DRange const & rRange : aRectangleVector)
+    {
+        aRangeUnion.expand(rRange);
+    }
+
+    int aPixelWidth = o3tl::convert(aRangeUnion.getWidth(), o3tl::Length::twip, o3tl::Length::px);
+    int aPixelHeight = o3tl::convert(aRangeUnion.getHeight(), o3tl::Length::twip, o3tl::Length::px);
+
+    size_t nByteSize = aPixelWidth * aPixelHeight * 4;
+
+    *pWidth = aPixelWidth;
+    *pHeight = aPixelHeight;
+    *pByteSize = nByteSize;
+
+    auto* pBuffer = static_cast<unsigned char*>(std::malloc(nByteSize));
+
+    doc_paintTile(pThis, pBuffer,
+        aPixelWidth, aPixelHeight,
+        aRangeUnion.getMinX(), aRangeUnion.getMinY(),
+        aRangeUnion.getWidth(), aRangeUnion.getHeight());
+
+    *pBitmapBuffer = pBuffer;
+
+    return true;
+}
+
+static void doc_sendContentControlEvent(LibreOfficeKitDocument* pThis, const char* pArguments)
+{
+    SolarMutexGuard aGuard;
+
+    // Supported in Writer only
+    if (doc_getDocumentType(pThis) != LOK_DOCTYPE_TEXT)
+    {
+        return;
+    }
+
+    StringMap aMap(jsdialog::jsonToStringMap(pArguments));
+    ITiledRenderable* pDoc = getTiledRenderable(pThis);
+    if (!pDoc)
+    {
+        SetLastExceptionMsg("Document doesn't support tiled rendering");
+        return;
+    }
+
+    // Sanity check
+    if (aMap.find("type") == aMap.end())
+    {
+        SetLastExceptionMsg("Missing 'type' argument for sendContentControlEvent");
+        return;
+    }
+
+    pDoc->executeContentControlEvent(aMap);
+}
+
+static char* lo_getError (LibreOfficeKit *pThis)
+{
+    comphelper::ProfileZone aZone("lo_getError");
+
+    SolarMutexGuard aGuard;
+
+    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);
+    return convertOUString(pLib->maLastExceptionMsg);
+}
+
+static void lo_freeError(char* pFree)
+{
+    free(pFree);
+}
+
+static char* lo_getFilterTypes(LibreOfficeKit* pThis)
+{
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    LibLibreOffice_Impl* pImpl = static_cast<LibLibreOffice_Impl*>(pThis);
+
+    if (!xSFactory.is())
+        xSFactory = comphelper::getProcessServiceFactory();
+
+    if (!xSFactory.is())
+    {
+        pImpl->maLastExceptionMsg = "Service factory is not available";
+        return nullptr;
+    }
+
+    uno::Reference<container::XNameAccess> xTypeDetection(xSFactory->createInstance("com.sun.star.document.TypeDetection"), uno::UNO_QUERY);
+    const uno::Sequence<OUString> aTypes = xTypeDetection->getElementNames();
+    tools::JsonWriter aJson;
+    for (const OUString& rType : aTypes)
+    {
+        uno::Sequence<beans::PropertyValue> aValues;
+        if (xTypeDetection->getByName(rType) >>= aValues)
+        {
+            auto it = std::find_if(std::cbegin(aValues), std::cend(aValues), [](const beans::PropertyValue& rValue) { return rValue.Name == "MediaType"; });
+            OUString aValue;
+            if (it != std::cend(aValues) && (it->Value >>= aValue) && !aValue.isEmpty())
+            {
+                auto typeNode = aJson.startNode(rType.toUtf8().getStr());
+                aJson.put("MediaType", aValue.toUtf8());
+            }
+        }
+    }
+
+    return aJson.extractData();
+}
+
+static void lo_setOptionalFeatures(LibreOfficeKit* pThis, unsigned long long const features)
+{
+    comphelper::ProfileZone aZone("lo_setOptionalFeatures");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    LibLibreOffice_Impl *const pLib = static_cast<LibLibreOffice_Impl*>(pThis);
+    pLib->mOptionalFeatures = features;
+    if (features & LOK_FEATURE_PART_IN_INVALIDATION_CALLBACK)
+        comphelper::LibreOfficeKit::setPartInInvalidation(true);
+    if (features & LOK_FEATURE_NO_TILED_ANNOTATIONS)
+        comphelper::LibreOfficeKit::setTiledAnnotations(false);
+    if (features & LOK_FEATURE_RANGE_HEADERS)
+        comphelper::LibreOfficeKit::setRangeHeaders(true);
+    if (features & LOK_FEATURE_VIEWID_IN_VISCURSOR_INVALIDATION_CALLBACK)
+        comphelper::LibreOfficeKit::setViewIdForVisCursorInvalidation(true);
+}
+
+static void lo_setDocumentPassword(LibreOfficeKit* pThis,
+        const char* pURL, const char* pPassword)
+{
+    comphelper::ProfileZone aZone("lo_setDocumentPassword");
+
+    SolarMutexGuard aGuard;
+    SetLastExceptionMsg();
+
+    assert(pThis);
+    assert(pURL);
+    LibLibreOffice_Impl *const pLib = static_cast<LibLibreOffice_Impl*>(pThis);
+    assert(pLib->mInteractionMap.find(OString(pURL)) != pLib->mInteractionMap.end());
+    pLib->mInteractionMap.find(OString(pURL))->second->SetPassword(pPassword);
+}
+
+static char* lo_getVersionInfo(SAL_UNUSED_PARAMETER LibreOfficeKit* /*pThis*/)
+{
+    SetLastExceptionMsg();
+    return convertOUString(ReplaceStringHookProc(
+        "{ "
+        "\"ProductName\": \"%PRODUCTNAME\", "
+        "\"ProductVersion\": \"%PRODUCTVERSION\", "
+        "\"ProductExtension\": \"%PRODUCTEXTENSION\", "
+        "\"BuildId\": \"%BUILDID\" "
+        "}"));
+}
+
+static void aBasicErrorFunc(const OUString& rError, const OUString& rAction)
+{
+    OString aBuffer = "Unexpected dialog: " +
+        OUStringToOString(rAction, RTL_TEXTENCODING_ASCII_US) +
+        " Error: " +
+        OUStringToOString(rError, RTL_TEXTENCODING_ASCII_US);
+
+    fprintf(stderr, "Unexpected basic error dialog '%s'\n", aBuffer.getStr());
+}
+
+static bool initialize_uno(const OUString& aAppProgramURL)
+{
+#ifdef IOS
+    // For iOS we already hardcode the inifile as "rc" in the .app directory.
+    rtl::Bootstrap::setIniFilename(aAppProgramURL + "/" SAL_CONFIGFILE("fundamental"));
+    xContext = cppu::defaultBootstrap_InitialComponentContext(aAppProgramURL + "/rc");
+#elif defined MACOSX
+    rtl::Bootstrap::setIniFilename(aAppProgramURL + "/../Resources/" SAL_CONFIGFILE("soffice"));
+    xContext = cppu::defaultBootstrap_InitialComponentContext();
+#else
+    rtl::Bootstrap::setIniFilename(aAppProgramURL + "/" SAL_CONFIGFILE("soffice"));
+    xContext = cppu::defaultBootstrap_InitialComponentContext();
+#endif
+
+    if (!xContext.is())
+    {
+        SetLastExceptionMsg("XComponentContext could not be created");
+        SAL_INFO("lok", "XComponentContext could not be created");
+        return false;
+    }
+
+    xFactory = xContext->getServiceManager();
+    if (!xFactory.is())
+    {
+        SetLastExceptionMsg("XMultiComponentFactory could not be created");
+        SAL_INFO("lok", "XMultiComponentFactory could not be created");
+        return false;
+    }
+
+    xSFactory.set(xFactory, uno::UNO_QUERY_THROW);
+    comphelper::setProcessServiceFactory(xSFactory);
+
+    SAL_INFO("lok", "Uno initialized  - " <<  xContext.is());
+
+    // set UserInstallation to user profile dir in test/user-template
+//    rtl::Bootstrap aDefaultVars;
+//    aDefaultVars.set(OUString("UserInstallation"), aAppProgramURL + "../registry" );
+    // configmgr setup ?
+
+    return true;
+}
+
+// pre-unipoll version.
+static void lo_startmain(void*)
+{
+    osl_setThreadName("lo_startmain");
+
+    if (comphelper::SolarMutex::get())
+        Application::GetSolarMutex().tryToAcquire();
+
+    Application::UpdateMainThread();
+
+    soffice_main();
+
+    Application::ReleaseSolarMutex();
+}
+
+// unipoll version.
+static void lo_runLoop(LibreOfficeKit* /*pThis*/,
+                       LibreOfficeKitPollCallback pPollCallback,
+                       LibreOfficeKitWakeCallback pWakeCallback,
+                       void* pData)
+{
+#if defined(IOS) || defined(ANDROID)
+    Application::GetSolarMutex().acquire();
+#endif
+
+    {
+        SolarMutexGuard aGuard;
+
+        vcl::lok::registerPollCallbacks(pPollCallback, pWakeCallback, pData);
+        Application::UpdateMainThread();
+        soffice_main();
+    }
+#if defined(IOS) || defined(ANDROID)
+    vcl::lok::unregisterPollCallbacks();
+    Application::ReleaseSolarMutex();
+#endif
+}
+
+static bool bInitialized = false;
+
+static void lo_status_indicator_callback(void *data, comphelper::LibreOfficeKit::statusIndicatorCallbackType type, int percent, const char* pText)
+{
+    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(data);
+
+    if (!pLib->mpCallback)
+        return;
+
+    switch (type)
+    {
+    case comphelper::LibreOfficeKit::statusIndicatorCallbackType::Start:
+        pLib->mpCallback(LOK_CALLBACK_STATUS_INDICATOR_START, pText, pLib->mpCallbackData);
+        break;
+    case comphelper::LibreOfficeKit::statusIndicatorCallbackType::SetValue:
+        pLib->mpCallback(LOK_CALLBACK_STATUS_INDICATOR_SET_VALUE,
+            OUString(OUString::number(percent)).toUtf8().getStr(), pLib->mpCallbackData);
+        break;
+    case comphelper::LibreOfficeKit::statusIndicatorCallbackType::Finish:
+        pLib->mpCallback(LOK_CALLBACK_STATUS_INDICATOR_FINISH, nullptr, pLib->mpCallbackData);
+        break;
+    }
+}
+
+/// Used only by LibreOfficeKit when used by Online to pre-initialize
+static void preloadData()
+{
+    comphelper::ProfileZone aZone("preload data");
+
+    // Create user profile in the temp directory for loading the dictionaries
+    OUString sUserPath;
+    rtl::Bootstrap::get("UserInstallation", sUserPath);
+    utl::TempFile aTempDir(nullptr, true);
+    aTempDir.EnableKillingFile();
+    rtl::Bootstrap::set("UserInstallation", aTempDir.GetURL());
+
+    // Register the bundled extensions
+    desktop::Desktop::SynchronizeExtensionRepositories(true);
+    bool bAbort = desktop::Desktop::CheckExtensionDependencies();
+    if(bAbort)
+        std::cerr << "CheckExtensionDependencies failed" << std::endl;
+
+    // preload all available dictionaries
+    css::uno::Reference<css::linguistic2::XLinguServiceManager> xLngSvcMgr =
+        css::linguistic2::LinguServiceManager::create(comphelper::getProcessComponentContext());
+    css::uno::Reference<linguistic2::XSpellChecker> xSpellChecker(xLngSvcMgr->getSpellChecker());
+
+    std::cerr << "Preloading dictionaries: ";
+    css::uno::Reference<linguistic2::XSupportedLocales> xSpellLocales(xSpellChecker, css::uno::UNO_QUERY_THROW);
+    uno::Sequence< css::lang::Locale > aLocales = xSpellLocales->getLocales();
+    for (auto &it : std::as_const(aLocales))
+    {
+        std::cerr << LanguageTag::convertToBcp47(it) << " ";
+        css::beans::PropertyValues aNone;
+        xSpellChecker->isValid("forcefed", it, aNone);
+    }
+    std::cerr << "\n";
+
+    // Hack to load and cache the module liblocaledata_others.so which is not loaded normally
+    // (when loading dictionaries of just non-Asian locales). Creating a XCalendar4 of one Asian locale
+    // will cheaply load this missing "others" locale library. Appending an Asian locale in
+    // LOK_ALLOWLIST_LANGUAGES env-var also works but at the cost of loading that dictionary.
+    css::uno::Reference< css::i18n::XCalendar4 > xCal = css::i18n::LocaleCalendar2::create(comphelper::getProcessComponentContext());
+    css::lang::Locale aAsianLocale = {"hi", "IN", ""};
+    xCal->loadDefaultCalendar(aAsianLocale);
+
+    // preload all available thesauri
+    css::uno::Reference<linguistic2::XThesaurus> xThesaurus(xLngSvcMgr->getThesaurus());
+    css::uno::Reference<linguistic2::XSupportedLocales> xThesLocales(xSpellChecker, css::uno::UNO_QUERY_THROW);
+    aLocales = xThesLocales->getLocales();
+    std::cerr << "Preloading thesauri: ";
+    for (auto &it : std::as_const(aLocales))
+    {
+        std::cerr << LanguageTag::convertToBcp47(it) << " ";
+        css::beans::PropertyValues aNone;
+        xThesaurus->queryMeanings("forcefed", it, aNone);
+    }
+    std::cerr << "\n";
+
+    css::uno::Reference< css::ui::XAcceleratorConfiguration > xGlobalCfg = css::ui::GlobalAcceleratorConfiguration::create(
+        comphelper::getProcessComponentContext());
+    xGlobalCfg->getAllKeyEvents();
+
+    std::cerr << "Preload icons\n";
+    ImageTree &images = ImageTree::get();
+    images.getImageUrl("forcefed.png", "style", "FO_oo");
+
+    std::cerr << "Preload languages\n";
+
+    // force load language singleton
+    SvtLanguageTable::HasLanguageType(LANGUAGE_SYSTEM);
+    (void)LanguageTag::isValidBcp47("foo", nullptr);
+
+    std::cerr << "Preload fonts\n";
+
+    // Initialize fonts.
+    css::uno::Reference<css::linguistic2::XLinguServiceManager2> xLangSrv = css::linguistic2::LinguServiceManager::create(xContext);
+    if (xLangSrv.is())
+    {
+        css::uno::Reference<css::linguistic2::XSpellChecker> xSpell = xLangSrv->getSpellChecker();
+        if (xSpell.is())
+            aLocales = xSpell->getLocales();
+    }
+
+    for (const auto& aLocale : std::as_const(aLocales))
+    {
+        //TODO: Add more types and cache more aggressively. For now this initializes the fontcache.
+        using namespace ::com::sun::star::i18n::ScriptType;
+        LanguageType nLang;
+        nLang = MsLangId::resolveSystemLanguageByScriptType(LanguageTag::convertToLanguageType(aLocale, false), LATIN);
+        OutputDevice::GetDefaultFont(DefaultFontType::LATIN_SPREADSHEET, nLang, GetDefaultFontFlags::OnlyOne);
+        nLang = MsLangId::resolveSystemLanguageByScriptType(LanguageTag::convertToLanguageType(aLocale, false), ASIAN);
+        OutputDevice::GetDefaultFont(DefaultFontType::CJK_SPREADSHEET, nLang, GetDefaultFontFlags::OnlyOne);
+        nLang = MsLangId::resolveSystemLanguageByScriptType(LanguageTag::convertToLanguageType(aLocale, false), COMPLEX);
+        OutputDevice::GetDefaultFont(DefaultFontType::CTL_SPREADSHEET, nLang, GetDefaultFontFlags::OnlyOne);
+    }
+
+    std::cerr << "Preload config\n";
+#if defined __GNUC__ || defined __clang__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-variable"
+#endif
+    static SvtOptionsDialogOptions aDialogOptions;
+    static SvtCTLOptions aSvtCTLOptions;
+    static SvtAccessibilityOptions aSvtAccessibilityOptions;
+    static svtools::ColorConfig aColorConfig;
+    static SvtMiscOptions aSvtMiscOptions;
+    static SvtSlideSorterBarOptions aSvtSlideSorterBarOptions;
+    static SvtCommandOptions aSvtCommandOptions;
+    static SvtCompatibilityOptions aSvtCompatibilityOptions;
+    static SvtFilterOptions aSvtFilterOptions;
+    static SvtLinguConfig aSvtLinguConfig;
+    static SvtModuleOptions aSvtModuleOptions;
+    static SvtPathOptions aSvtPathOptions;
+    static SvtSearchOptions aSvtSearchOptions;
+    static SvtSysLocaleOptions aSvtSysLocaleOptions;
+    static SvtUserOptions aSvtUserOptions;
+    //static SvtViewOptions aSvtViewOptions;
+    static MouseSettings aMouseSettings;
+    static StyleSettings aStyleSettings;
+    static MiscSettings aMiscSettings;
+    static HelpSettings aHelpSettings;
+    static AllSettings aAllSettings;
+#if defined __GNUC__ || defined __clang__
+#pragma GCC diagnostic pop
+#endif
+
+    // Set user profile's path back to the original one
+    rtl::Bootstrap::set("UserInstallation", sUserPath);
+}
+
+namespace {
+
+static void activateNotebookbar(std::u16string_view rApp)
+{
+    OUString aPath = OUString::Concat("org.openoffice.Office.UI.ToolbarMode/Applications/") + rApp;
+
+    const utl::OConfigurationTreeRoot aAppNode(xContext, aPath, true);
+
+    if (aAppNode.isValid())
+    {
+        aAppNode.setNodeValue("Active", Any(OUString("notebookbar_online.ui")));
+        aAppNode.commit();
+    }
+}
+
+void setCertificateDir()
+{
+    const char* pEnvVarString = ::getenv("LO_CERTIFICATE_DATABASE_PATH");
+    if (pEnvVarString)
+    {
+        OUString aCertificateDatabasePath = OStringToOUString(pEnvVarString, RTL_TEXTENCODING_UTF8);
+        try
+        {
+            std::shared_ptr<comphelper::ConfigurationChanges> pBatch(comphelper::ConfigurationChanges::create());
+            officecfg::Office::Common::Security::Scripting::CertDir::set(aCertificateDatabasePath, pBatch);
+            officecfg::Office::Common::Security::Scripting::ManualCertDir::set(aCertificateDatabasePath, pBatch);
+            pBatch->commit();
+        }
+        catch (uno::Exception const& rException)
+        {
+            SAL_WARN("lok", "Failed to set the NSS certificate database directory: " << rException.Message);
+        }
+    }
+}
+
+}
+
+static int lo_initialize(LibreOfficeKit* pThis, const char* pAppPath, const char* pUserProfileUrl)
+{
+    enum {
+        PRE_INIT,     // setup shared data in master process
+        SECOND_INIT,  // complete init. after fork
+        FULL_INIT     // do a standard complete init.
+    } eStage;
+
+    // Did we do a pre-initialize
+    static bool bPreInited = false;
+    static bool bUnipoll = false;
+    static bool bProfileZones = false;
+    static bool bNotebookbar = false;
+
+    { // cf. string lifetime for preinit
+        std::vector<OUString> aOpts;
+
+        // ':' delimited options - avoiding ABI change for new parameters
+        const char *pOptions = getenv("SAL_LOK_OPTIONS");
+        if (pOptions)
+            aOpts = comphelper::string::split(OUString(pOptions, strlen(pOptions), RTL_TEXTENCODING_UTF8), ':');
+        for (const auto &it : aOpts)
+        {
+            if (it == "unipoll")
+                bUnipoll = true;
+            else if (it == "profile_events")
+                bProfileZones = true;
+            else if (it == "sc_no_grid_bg")
+                comphelper::LibreOfficeKit::setCompatFlag(
+                    comphelper::LibreOfficeKit::Compat::scNoGridBackground);
+            else if (it == "sc_print_twips_msgs")
+                comphelper::LibreOfficeKit::setCompatFlag(
+                    comphelper::LibreOfficeKit::Compat::scPrintTwipsMsgs);
+            else if (it == "notebookbar")
+                bNotebookbar = true;
+        }
+    }
+
+    // What stage are we at ?
+    if (pThis == nullptr)
+    {
+        eStage = PRE_INIT;
+        if (lok_preinit_2_called)
+        {
+            SAL_INFO("lok", "Create libreoffice object");
+            gImpl = new LibLibreOffice_Impl();
+        }
+    }
+    else if (bPreInited)
+        eStage = SECOND_INIT;
+    else
+        eStage = FULL_INIT;
+
+    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);
+
+    if (bInitialized)
+        return 1;
+
+    // Turn profile zones on early
+    if (bProfileZones && eStage == SECOND_INIT)
+    {
+        comphelper::TraceEvent::startRecording();
+        traceEventDumper = new TraceEventDumper();
+    }
+
+    comphelper::ProfileZone aZone("lok-init");
+
+    if (eStage == PRE_INIT)
+        rtl_alloc_preInit(true);
+
+    if (eStage != SECOND_INIT)
+        comphelper::LibreOfficeKit::setActive();
+
+    if (eStage != PRE_INIT)
+        comphelper::LibreOfficeKit::setStatusIndicatorCallback(lo_status_indicator_callback, pLib);
+
+    if (pUserProfileUrl && eStage != PRE_INIT)
+    {
+        OUString url(
+            pUserProfileUrl, strlen(pUserProfileUrl), RTL_TEXTENCODING_UTF8);
+        OUString path;
+        if (url.startsWithIgnoreAsciiCase("vnd.sun.star.pathname:", &path))
+        {
+            OUString url2;
+            osl::FileBase::RC e = osl::FileBase::getFileURLFromSystemPath(
+                path, url2);
+            if (e == osl::FileBase::E_None)
+                url = url2;
+            else
+                SAL_WARN("lok", "resolving <" << url << "> failed with " << +e);
+        }
+        rtl::Bootstrap::set("UserInstallation", url);
+        if (eStage == SECOND_INIT)
+            utl::Bootstrap::reloadData();
+    }
+
+    OUString aAppPath;
+    if (pAppPath)
+    {
+        aAppPath = OUString(pAppPath, strlen(pAppPath), RTL_TEXTENCODING_UTF8);
+    }
+    else
+    {
+#ifdef ANDROID
+        aAppPath = OUString::fromUtf8(lo_get_app_data_dir()) + "/program";
+#else
+        // Fun conversion dance back and forth between URLs and system paths...
+        OUString aAppURL;
+        ::osl::Module::getUrlFromAddress( reinterpret_cast< oslGenericFunction >(lo_initialize),
+                                          aAppURL);
+        osl::FileBase::getSystemPathFromFileURL( aAppURL, aAppPath );
+#endif
+
+#ifdef IOS
+        // The above gives something like
+        // "/private/var/containers/Bundle/Application/953AA851-CC15-4C60-A2CB-C2C6F24E6F71/Foo.app/Foo",
+        // and we want to drop the final component (the binary name).
+        sal_Int32 lastSlash = aAppPath.lastIndexOf('/');
+        assert(lastSlash > 0);
+        aAppPath = aAppPath.copy(0, lastSlash);
+#endif
+    }
+
+    OUString aAppURL;
+    if (osl::FileBase::getFileURLFromSystemPath(aAppPath, aAppURL) != osl::FileBase::E_None)
+        return 0;
+
+#ifdef IOS
+    // A LibreOffice-using iOS app should have the ICU data file in the app bundle. Initialize ICU
+    // to use that.
+    NSString *bundlePath = [[NSBundle mainBundle] bundlePath];
+
+    int fd = open([[bundlePath stringByAppendingPathComponent:@"ICU.dat"] UTF8String], O_RDONLY);
+    if (fd == -1)
+        NSLog(@"Could not open ICU data file %s", [[bundlePath stringByAppendingPathComponent:@"ICU.dat"] UTF8String]);
+    else
+    {
+        struct stat st;
+        if (fstat(fd, &st) == -1)
+            NSLog(@"fstat on ICU data file failed: %s", strerror(errno));
+        else
+        {
+            void *icudata = mmap(0, (size_t) st.st_size, PROT_READ, MAP_FILE|MAP_PRIVATE, fd, 0);
+            if (icudata == MAP_FAILED)
+                NSLog(@"mmap failed: %s", strerror(errno));
+            else
+            {
+                UErrorCode icuStatus = U_ZERO_ERROR;
+                udata_setCommonData(icudata, &icuStatus);
+                if (U_FAILURE(icuStatus))
+                    NSLog(@"udata_setCommonData failed");
+                else
+                {
+                    // Quick test that ICU works...
+                    UConverter *cnv = ucnv_open("iso-8859-3", &icuStatus);
+                    if (U_SUCCESS(icuStatus))
+                        ucnv_close(cnv);
+                    else
+                        NSLog(@"ucnv_open() failed: %s", u_errorName(icuStatus));
+                }
+            }
+        }
+        close(fd);
+    }
+#endif
+
+    try
+    {
+        if (eStage != SECOND_INIT)
+        {
+            SAL_INFO("lok", "Attempting to initialize UNO");
+
+            if (!initialize_uno(aAppURL))
+                return false;
+
+            // Force headless -- this is only for bitmap rendering.
+            rtl::Bootstrap::set("SAL_USE_VCLPLUGIN", "svp");
+
+            // We specifically need to make sure we have the "headless"
+            // command arg set (various code specifically checks via
+            // CommandLineArgs):
+            desktop::Desktop::GetCommandLineArgs().setHeadless();
+
+#ifdef IOS
+            if (InitVCL() && [NSThread isMainThread])
+            {
+                static bool bFirstTime = true;
+                if (bFirstTime)
+                {
+                    Application::GetSolarMutex().release();
+                    bFirstTime = false;
+                }
+            }
+            SfxApplication::GetOrCreate();
+#endif
+
+#if HAVE_FEATURE_ANDROID_LOK
+            // Register the bundled extensions - so that the dictionaries work
+            desktop::Desktop::SynchronizeExtensionRepositories(false);
+            bool bFailed = desktop::Desktop::CheckExtensionDependencies();
+            if (bFailed)
+                SAL_INFO("lok", "CheckExtensionDependencies failed");
+#endif
+
+            if (eStage == PRE_INIT)
+            {
+                {
+                    comphelper::ProfileZone aInit("Init vcl");
+                    std::cerr << "Init vcl\n";
+                    InitVCL();
+                }
+
+                // pre-load all component libraries.
+                if (!xContext.is())
+                    throw css::uno::DeploymentException("preInit: XComponentContext is not created");
+
+                css::uno::Reference< css::uno::XInterface > xService;
+                xContext->getValueByName("/singletons/com.sun.star.lang.theServiceManager") >>= xService;
+                if (!xService.is())
+                    throw css::uno::DeploymentException("preInit: XMultiComponentFactory is not created");
+
+                css::uno::Reference<css::lang::XInitialization> aService(
+                    xService, css::uno::UNO_QUERY_THROW);
+
+                // pre-requisites:
+                // In order to load implementations and invoke
+                // component factory it is required:
+                // 1) defaultBootstrap_InitialComponentContext()
+                // 2) comphelper::setProcessServiceFactory(xSFactory);
+                // 3) InitVCL()
+                {
+                    comphelper::ProfileZone aInit("preload");
+                    aService->initialize({css::uno::Any(OUString("preload"))});
+                }
+                { // Force load some modules
+                    comphelper::ProfileZone aInit("preload modules");
+                    VclBuilderPreload();
+                    VclAbstractDialogFactory::Create();
+                }
+
+                preloadData();
+
+                // Release Solar Mutex, lo_startmain thread should acquire it.
+                Application::ReleaseSolarMutex();
+            }
+
+            setLanguageAndLocale("en-US");
+        }
+
+        if (eStage != PRE_INIT)
+        {
+            SAL_INFO("lok", "Re-initialize temp paths");
+            SvtPathOptions aOptions;
+            OUString aNewTemp;
+            osl::FileBase::getTempDirURL(aNewTemp);
+            aOptions.SetTempPath(aNewTemp);
+            desktop::Desktop::CreateTemporaryDirectory();
+
+            // The RequestHandler is specifically set to be ready when all the other
+            // init in Desktop::Main (run from soffice_main) is done. We can enable
+            // the RequestHandler here (without starting any IPC thread;
+            // shortcutting the invocation in Desktop::Main that would start the IPC
+            // thread), and can then use it to wait until we're definitely ready to
+            // continue.
+
+            SAL_INFO("lok", "Enabling RequestHandler");
+            RequestHandler::Enable(false);
+            SAL_INFO("lok", "Starting soffice_main");
+            RequestHandler::SetReady(false);
+            if (!bUnipoll)
+            {
+                // Start the main thread only in non-unipoll mode (i.e. multithreaded).
+                pLib->maThread = osl_createThread(lo_startmain, nullptr);
+                SAL_INFO("lok", "Waiting for RequestHandler");
+                RequestHandler::WaitForReady();
+                SAL_INFO("lok", "RequestHandler ready -- continuing");
+            }
+            else
+                InitVCL();
+        }
+
+        if (eStage != SECOND_INIT)
+            ErrorRegistry::RegisterDisplay(aBasicErrorFunc);
+
+        SAL_INFO("lok", "LOK Initialized");
+        if (eStage == PRE_INIT)
+            bPreInited = true;
+        else
+            bInitialized = true;
+    }
+    catch (css::uno::Exception& exception)
+    {
+        fprintf(stderr, "Bootstrapping exception '%s'\n",
+                 OUStringToOString(exception.Message, RTL_TEXTENCODING_UTF8).getStr());
+    }
+
+    if (eStage == PRE_INIT)
+    {
+        comphelper::ThreadPool::getSharedOptimalPool().shutdown();
+    }
+
+// Turn off quick editing on IOS and ANDROID
+#if defined IOS || defined ANDROID
+    if (officecfg::Office::Impress::Misc::TextObject::QuickEditing::get())
+    {
+        std::shared_ptr<comphelper::ConfigurationChanges> batch(comphelper::ConfigurationChanges::create());
+        officecfg::Office::Impress::Misc::TextObject::QuickEditing::set(false, batch);
+        batch->commit();
+    }
+#endif
+
+    setCertificateDir();
+
+    if (bNotebookbar)
+    {
+        activateNotebookbar(u"Writer");
+        activateNotebookbar(u"Calc");
+        activateNotebookbar(u"Impress");
+        activateNotebookbar(u"Draw");
+    }
+
+    // staticize all strings.
+    if (eStage == PRE_INIT)
+        rtl_alloc_preInit(false);
+
+    return bInitialized;
+}
+
+SAL_JNI_EXPORT
+LibreOfficeKit *libreofficekit_hook_2(const char* install_path, const char* user_profile_url)
+{
+    static bool alreadyCalled = false;
+
+    if ((!lok_preinit_2_called && !gImpl) || (lok_preinit_2_called && !alreadyCalled))
+    {
+        alreadyCalled = true;
+
+        if (!lok_preinit_2_called)
+        {
+            SAL_INFO("lok", "Create libreoffice object");
+            gImpl = new LibLibreOffice_Impl();
+        }
+
+        if (!lo_initialize(gImpl, install_path, user_profile_url))
+        {
+            lo_destroy(gImpl);
+        }
+    }
+    return static_cast<LibreOfficeKit*>(gImpl);
+}
+
+SAL_JNI_EXPORT
+LibreOfficeKit *libreofficekit_hook(const char* install_path)
+{
+    return libreofficekit_hook_2(install_path, nullptr);
+}
+
+SAL_JNI_EXPORT
+int lok_preinit(const char* install_path, const char* user_profile_url)
+{
+    return lo_initialize(nullptr, install_path, user_profile_url);
+}
+
+SAL_JNI_EXPORT
+int lok_preinit_2(const char* install_path, const char* user_profile_url, LibreOfficeKit** kit)
+{
+    lok_preinit_2_called = true;
+    int result = lo_initialize(nullptr, install_path, user_profile_url);
+    if (kit != nullptr)
+        *kit = gImpl;
+    return result;
+}
+
+static void lo_destroy(LibreOfficeKit* pThis)
+{
+    SolarMutexClearableGuard aGuard;
+
+    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);
+    gImpl = nullptr;
+
+    SAL_INFO("lok", "LO Destroy");
+
+    comphelper::LibreOfficeKit::setStatusIndicatorCallback(nullptr, nullptr);
+    uno::Reference <frame::XDesktop2> xDesktop = frame::Desktop::create ( ::comphelper::getProcessComponentContext() );
+    // FIXME: the terminate() call here is a no-op because it detects
+    // that LibreOfficeKit::isActive() and then returns early!
+    bool bSuccess = xDesktop.is() && xDesktop->terminate();
+
+    if (!bSuccess)
+    {
+        bSuccess = GetpApp() && GetpApp()->QueryExit();
+    }
+
+    if (!bSuccess)
+    {
+        Application::Quit();
+    }
+
+    aGuard.clear();
+
+    osl_joinWithThread(pLib->maThread);
+    osl_destroyThread(pLib->maThread);
+
+    delete pLib;
+    bInitialized = false;
+    SAL_INFO("lok", "LO Destroy Done");
+}
+
+#ifdef IOS
+
+// Used by the unmaintained LibreOfficeLight app. Once that has been retired, get rid of this, too.
+
+__attribute__((visibility("default")))
+void temporaryHackToInvokeCallbackHandlers(LibreOfficeKitDocument* pThis)
+{
+    SolarMutexGuard aGuard;
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    int nOrigViewId = doc_getView(pThis);
+
+    if (nOrigViewId >= 0 && pDocument->mpCallbackFlushHandlers[nOrigViewId])
+    {
+        pDocument->mpCallbackFlushHandlers[nOrigViewId]->Invoke();
+    }
+}
+
+#endif
+
+} // extern "C"
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/lib/lokandroid.cxx b/desktop/source/lib/lokandroid.cxx
new file mode 100644
index 000000000..e800c82b0
--- /dev/null
+++ b/desktop/source/lib/lokandroid.cxx
@@ -0,0 +1,422 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <unistd.h>
+#include <jni.h>
+
+#include <sal/types.h>
+#include <vcl/event.hxx>
+#include <android/log.h>
+
+#include <osl/detail/android-bootstrap.h>
+
+#include <LibreOfficeKit/LibreOfficeKit.h>
+
+/* LibreOfficeKit */
+
+namespace
+{
+
+jfieldID getHandleField(JNIEnv* pEnv, jobject aObject)
+{
+    jclass clazz = pEnv->GetObjectClass(aObject);
+    return pEnv->GetFieldID(clazz, "handle", "Ljava/nio/ByteBuffer;");
+}
+
+template <typename T>
+T* getHandle(JNIEnv* pEnv, jobject aObject)
+{
+    jobject aHandle = pEnv->GetObjectField(aObject, getHandleField(pEnv, aObject));
+    return reinterpret_cast<T*>(pEnv->GetDirectBufferAddress(aHandle));
+}
+
+const char* copyJavaString(JNIEnv* pEnv, jstring aJavaString)
+{
+    const char* pTemp = pEnv->GetStringUTFChars(aJavaString, NULL);
+    const char* pClone = strdup(pTemp);
+    pEnv->ReleaseStringUTFChars(aJavaString, pTemp);
+
+    return pClone;
+}
+
+} // anonymous namespace
+
+extern "C" SAL_JNI_EXPORT jstring JNICALL Java_org_libreoffice_kit_Office_getError
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKit* pLibreOfficeKit = getHandle<LibreOfficeKit>(pEnv, aObject);
+    char* pError = pLibreOfficeKit->pClass->getError(pLibreOfficeKit);
+    return pEnv->NewStringUTF(pError);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Office_destroy
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKit* pLibreOfficeKit = getHandle<LibreOfficeKit>(pEnv, aObject);
+    pLibreOfficeKit->pClass->destroy(pLibreOfficeKit);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Office_destroyAndExit(JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKit* pLibreOfficeKit = getHandle<LibreOfficeKit>(pEnv, aObject);
+    pLibreOfficeKit->pClass->destroy(pLibreOfficeKit);
+    // Stopgap fix: _exit() to force the OS to restart the LO activity.
+    // Better than to hang.
+    _exit(0);
+}
+
+namespace
+{
+
+struct CallbackData
+{
+    jmethodID aJavaCallbackMethod;
+    jclass aClass;
+    jobject aObject;
+};
+
+static CallbackData gCallbackData;
+static CallbackData gCallbackDataLOKit;
+
+/**
+ * Handle retrieved callback
+ */
+void messageCallback(int nType, const char* pPayload, void* pData)
+{
+    CallbackData* pCallbackData = (CallbackData*) pData;
+
+    JavaVM* pJavaVM = lo_get_javavm();
+    JNIEnv* pEnv;
+    bool bIsAttached = false;
+
+    int status = pJavaVM->GetEnv((void **) &pEnv, JNI_VERSION_1_6);
+
+    if(status < 0)
+    {
+        status = pJavaVM->AttachCurrentThread(&pEnv, NULL);
+        if(status < 0)
+        {
+            return;
+        }
+        bIsAttached = true;
+    }
+
+    jstring sPayload = pEnv->NewStringUTF(pPayload);
+
+    jvalue aParameter[2];
+    aParameter[0].i = nType;
+    aParameter[1].l = sPayload;
+
+    pEnv->CallVoidMethodA(pCallbackData->aObject, pCallbackData->aJavaCallbackMethod, aParameter);
+
+    pEnv->DeleteLocalRef(sPayload);
+
+    if (bIsAttached)
+    {
+        pJavaVM->DetachCurrentThread();
+    }
+}
+
+} // anonymous namespace
+
+extern "C" SAL_JNI_EXPORT jobject JNICALL Java_org_libreoffice_kit_Office_documentLoadNative
+    (JNIEnv* pEnv, jobject aObject, jstring documentPath)
+{
+    const char* aCloneDocumentPath = copyJavaString(pEnv, documentPath);
+    LibreOfficeKit* pLibreOfficeKit = getHandle<LibreOfficeKit>(pEnv, aObject);
+
+    LibreOfficeKitDocument* pDocument = pLibreOfficeKit->pClass->documentLoad(pLibreOfficeKit, aCloneDocumentPath);
+
+    if (pDocument == NULL)
+        return NULL;
+
+    jobject aHandle = pEnv->NewDirectByteBuffer((void*) pDocument, sizeof(LibreOfficeKitDocument));
+
+    return aHandle;
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Office_setDocumentPassword
+    (JNIEnv* pEnv, jobject aObject, jstring sUrl, jstring sPassword)
+{
+    LibreOfficeKit* pLibreOfficeKit = getHandle<LibreOfficeKit>(pEnv, aObject);
+
+    char const* pUrl = copyJavaString(pEnv, sUrl);
+    if (sPassword == NULL) {
+        pLibreOfficeKit->pClass->setDocumentPassword(pLibreOfficeKit, pUrl, nullptr);
+    } else {
+        char const* pPassword = copyJavaString(pEnv, sPassword);
+        pLibreOfficeKit->pClass->setDocumentPassword(pLibreOfficeKit, pUrl, pPassword);
+    }
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Office_setOptionalFeatures
+    (JNIEnv* pEnv, jobject aObject, jlong options)
+{
+    LibreOfficeKit* pLibreOfficeKit = getHandle<LibreOfficeKit>(pEnv, aObject);
+
+    unsigned long long pOptions = (unsigned long long)options;
+
+    pLibreOfficeKit->pClass->setOptionalFeatures(pLibreOfficeKit, pOptions);
+}
+
+/** Implementation of org.libreoffice.kit.Office.bindMessageCallback method */
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Office_bindMessageCallback
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKit* pLibreOfficeKit = getHandle<LibreOfficeKit>(pEnv, aObject);
+
+    gCallbackDataLOKit.aObject = (jobject) pEnv->NewGlobalRef(aObject);
+    jclass aClass = pEnv->GetObjectClass(aObject);
+    gCallbackDataLOKit.aClass = (jclass) pEnv->NewGlobalRef(aClass);
+
+    gCallbackDataLOKit.aJavaCallbackMethod = pEnv->GetMethodID(aClass, "messageRetrievedLOKit", "(ILjava/lang/String;)V");
+
+    pLibreOfficeKit->pClass->registerCallback(pLibreOfficeKit, messageCallback, (void*) &gCallbackDataLOKit);
+}
+
+/* Document */
+
+/** Implementation of org.libreoffice.kit.Document.bindMessageCallback method */
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_bindMessageCallback
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+
+    gCallbackData.aObject = (jobject) pEnv->NewGlobalRef(aObject);
+    jclass aClass = pEnv->GetObjectClass(aObject);
+    gCallbackData.aClass = (jclass) pEnv->NewGlobalRef(aClass);
+
+    gCallbackData.aJavaCallbackMethod = pEnv->GetMethodID(aClass, "messageRetrieved", "(ILjava/lang/String;)V");
+
+    pDocument->pClass->registerCallback(pDocument, messageCallback, (void*) &gCallbackData);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_destroy
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    pDocument->pClass->destroy(pDocument);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_setPart
+    (JNIEnv* pEnv, jobject aObject, jint aPart)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    pDocument->pClass->setPart(pDocument, aPart);
+}
+
+extern "C" SAL_JNI_EXPORT jint JNICALL Java_org_libreoffice_kit_Document_getPart
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    return (jint) pDocument->pClass->getPart(pDocument);
+}
+
+extern "C" SAL_JNI_EXPORT jstring JNICALL Java_org_libreoffice_kit_Document_getPartPageRectangles
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    char* pRectangles = pDocument->pClass->getPartPageRectangles(pDocument);
+    return pEnv->NewStringUTF(pRectangles);
+}
+
+extern "C" SAL_JNI_EXPORT jint JNICALL Java_org_libreoffice_kit_Document_getParts
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    return (jint) pDocument->pClass->getParts(pDocument);
+}
+
+extern "C" SAL_JNI_EXPORT jstring JNICALL Java_org_libreoffice_kit_Document_getPartName
+    (JNIEnv* pEnv, jobject aObject, jint nPartIndex)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    char* pPartName = pDocument->pClass->getPartName(pDocument, nPartIndex);
+    return pEnv->NewStringUTF(pPartName);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_setPartMode
+    (JNIEnv* pEnv, jobject aObject, jint nPartMode)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+
+    pDocument->pClass->setPartMode(pDocument, nPartMode);
+}
+
+extern "C" SAL_JNI_EXPORT jint JNICALL Java_org_libreoffice_kit_Document_getDocumentTypeNative
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    return (jint) pDocument->pClass->getDocumentType(pDocument);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_paintTileNative
+    (JNIEnv* pEnv, jobject aObject, jobject aByteBuffer,
+    jint nCanvasWidth, jint nCanvasHeight, jint nTilePosX, jint nTilePosY,
+    jint nTileWidth, jint nTileHeight)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+
+    unsigned char* buffer = (unsigned char*) pEnv->GetDirectBufferAddress(aByteBuffer);
+    pDocument->pClass->paintTile(pDocument, buffer, nCanvasWidth, nCanvasHeight, nTilePosX, nTilePosY, nTileWidth, nTileHeight);
+}
+
+extern "C" SAL_JNI_EXPORT jlong JNICALL Java_org_libreoffice_kit_Document_getDocumentHeight
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    long nWidth;
+    long nHeight;
+    pDocument->pClass->getDocumentSize(pDocument, &nWidth, &nHeight);
+    return nHeight;
+}
+
+extern "C" SAL_JNI_EXPORT jlong JNICALL Java_org_libreoffice_kit_Document_getDocumentWidth
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    long nWidth;
+    long nHeight;
+    pDocument->pClass->getDocumentSize(pDocument, &nWidth, &nHeight);
+    return nWidth;
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_initializeForRendering
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    pDocument->pClass->initializeForRendering(pDocument, NULL);
+}
+
+extern "C" SAL_JNI_EXPORT jint JNICALL Java_org_libreoffice_kit_Document_saveAs
+    (JNIEnv* pEnv, jobject aObject, jstring sUrl, jstring sFormat, jstring sOptions)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+
+    const char* pUrl = pEnv->GetStringUTFChars(sUrl, NULL);
+    const char* pFormat = pEnv->GetStringUTFChars(sFormat, NULL);
+    const char* pOptions = pEnv->GetStringUTFChars(sOptions, NULL);
+
+    int result = pDocument->pClass->saveAs(pDocument, pUrl, pFormat, pOptions);
+
+    pEnv->ReleaseStringUTFChars(sUrl, pUrl);
+    pEnv->ReleaseStringUTFChars(sFormat, pFormat);
+    pEnv->ReleaseStringUTFChars(sOptions, pOptions);
+
+    return result;
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_postKeyEvent
+    (JNIEnv* pEnv, jobject aObject, jint nType, jint nCharCode, jint nKeyCode)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    pDocument->pClass->postKeyEvent(pDocument, nType, nCharCode, nKeyCode);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_postMouseEvent
+    (JNIEnv* pEnv, jobject aObject, jint type, jint x, jint y, jint count, jint button, jint modifier)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    pDocument->pClass->postMouseEvent(pDocument, type, x, y, count, button, modifier);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_postUnoCommand
+    (JNIEnv* pEnv, jobject aObject, jstring command, jstring arguments, jboolean bNotifyWhenFinished)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+
+    const char* pCommand = pEnv->GetStringUTFChars(command, NULL);
+    const char* pArguments = nullptr;
+    if (arguments != NULL)
+        pArguments = pEnv->GetStringUTFChars(arguments, NULL);
+
+    pDocument->pClass->postUnoCommand(pDocument, pCommand, pArguments, bNotifyWhenFinished);
+
+    pEnv->ReleaseStringUTFChars(command, pCommand);
+    if (arguments != NULL)
+        pEnv->ReleaseStringUTFChars(arguments, pArguments);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_setTextSelection
+    (JNIEnv* pEnv, jobject aObject, jint type, jint x, jint y)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    pDocument->pClass->setTextSelection(pDocument, type, x, y);
+}
+
+extern "C" SAL_JNI_EXPORT jstring JNICALL Java_org_libreoffice_kit_Document_getTextSelection
+    (JNIEnv* pEnv, jobject aObject, jstring mimeType)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+
+    const char* pMimeType = pEnv->GetStringUTFChars(mimeType, NULL);
+
+    char* pUsedMimeType = 0;
+    LibreOfficeKitDocumentClass* pcls = pDocument->pClass;
+    char* pSelection = pcls->getTextSelection(pDocument, pMimeType, &pUsedMimeType);
+    free(pUsedMimeType);
+
+    pEnv->ReleaseStringUTFChars(mimeType, pMimeType);
+
+    return pEnv->NewStringUTF(pSelection);
+}
+
+extern "C" SAL_JNI_EXPORT jboolean JNICALL Java_org_libreoffice_kit_Document_paste
+    (JNIEnv* pEnv, jobject aObject, jstring mimeType, jstring data)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+
+    const char* pMimeType = pEnv->GetStringUTFChars(mimeType, NULL);
+    const char* pData = pEnv->GetStringUTFChars(data, NULL);
+    const size_t nSize = pEnv->GetStringLength(data);
+
+    LibreOfficeKitDocumentClass* pcls = pDocument->pClass;
+    bool result = pcls->paste(pDocument, pMimeType, pData, nSize);
+    pEnv->ReleaseStringUTFChars(mimeType, pMimeType);
+    pEnv->ReleaseStringUTFChars(data, pData);
+
+    return result;
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_setGraphicSelection
+    (JNIEnv* pEnv, jobject aObject, jint type, jint x, jint y)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    pDocument->pClass->setGraphicSelection(pDocument, type, x, y);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_resetSelection
+    (JNIEnv* pEnv, jobject aObject)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    pDocument->pClass->resetSelection(pDocument);
+}
+
+extern "C" SAL_JNI_EXPORT jstring JNICALL Java_org_libreoffice_kit_Document_getCommandValues
+    (JNIEnv* pEnv, jobject aObject, jstring command)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+
+    const char* pCommand = pEnv->GetStringUTFChars(command, NULL);
+
+    char* pValue = pDocument->pClass->getCommandValues(pDocument, pCommand);
+
+    pEnv->ReleaseStringUTFChars(command, pCommand);
+
+    return pEnv->NewStringUTF(pValue);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL Java_org_libreoffice_kit_Document_setClientZoom
+    (JNIEnv* pEnv, jobject aObject, jint nTilePixelWidth, jint nTilePixelHeight, jint nTileTwipWidth, jint nTileTwipHeight)
+{
+    LibreOfficeKitDocument* pDocument = getHandle<LibreOfficeKitDocument>(pEnv, aObject);
+    pDocument->pClass->setClientZoom(pDocument, nTilePixelWidth, nTilePixelHeight, nTileTwipWidth, nTileTwipHeight);
+
+}
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/lib/lokclipboard.cxx b/desktop/source/lib/lokclipboard.cxx
new file mode 100644
index 000000000..b4de36c56
--- /dev/null
+++ b/desktop/source/lib/lokclipboard.cxx
@@ -0,0 +1,230 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include "lokclipboard.hxx"
+#include <unordered_map>
+#include <vcl/lazydelete.hxx>
+#include <sfx2/lokhelper.hxx>
+#include <sal/log.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+using namespace css;
+using namespace css::uno;
+
+/* static */ osl::Mutex LOKClipboardFactory::gMutex;
+static vcl::DeleteOnDeinit<std::unordered_map<int, rtl::Reference<LOKClipboard>>> gClipboards{};
+
+rtl::Reference<LOKClipboard> LOKClipboardFactory::getClipboardForCurView()
+{
+    int nViewId = SfxLokHelper::getView(); // currently active.
+
+    osl::MutexGuard aGuard(gMutex);
+
+    auto it = gClipboards.get()->find(nViewId);
+    if (it != gClipboards.get()->end())
+    {
+        SAL_INFO("lok", "Got clip: " << it->second.get() << " from " << nViewId);
+        return it->second;
+    }
+    rtl::Reference<LOKClipboard> xClip(new LOKClipboard());
+    (*gClipboards.get())[nViewId] = xClip;
+    SAL_INFO("lok", "Created clip: " << xClip.get() << " for viewId " << nViewId);
+    return xClip;
+}
+
+void LOKClipboardFactory::releaseClipboardForView(int nViewId)
+{
+    osl::MutexGuard aGuard(gMutex);
+
+    if (nViewId < 0) // clear all
+    {
+        gClipboards.get()->clear();
+        SAL_INFO("lok", "Released all clipboards on doc destroy\n");
+    }
+    else if (gClipboards.get())
+    {
+        auto it = gClipboards.get()->find(nViewId);
+        if (it != gClipboards.get()->end())
+        {
+            SAL_INFO("lok", "Releasing clip: " << it->second.get() << " for destroyed " << nViewId);
+            gClipboards.get()->erase(it);
+        }
+    }
+}
+
+uno::Reference<uno::XInterface>
+    SAL_CALL LOKClipboardFactory::createInstanceWithArguments(const Sequence<Any>& /* rArgs */)
+{
+    return { static_cast<cppu::OWeakObject*>(getClipboardForCurView().get()) };
+}
+
+LOKClipboard::LOKClipboard()
+    : cppu::WeakComponentImplHelper<css::datatransfer::clipboard::XSystemClipboard,
+                                    css::lang::XServiceInfo>(m_aMutex)
+{
+    // Encourage 'paste' menu items to always show up.
+    uno::Reference<datatransfer::XTransferable> xTransferable(new LOKTransferable());
+    setContents(xTransferable, uno::Reference<datatransfer::clipboard::XClipboardOwner>());
+}
+
+Sequence<OUString> LOKClipboard::getSupportedServiceNames_static()
+{
+    Sequence<OUString> aRet{ "com.sun.star.datatransfer.clipboard.SystemClipboard" };
+    return aRet;
+}
+
+OUString LOKClipboard::getImplementationName() { return "com.sun.star.datatransfer.LOKClipboard"; }
+
+Sequence<OUString> LOKClipboard::getSupportedServiceNames()
+{
+    return getSupportedServiceNames_static();
+}
+
+sal_Bool LOKClipboard::supportsService(const OUString& ServiceName)
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+Reference<css::datatransfer::XTransferable> LOKClipboard::getContents() { return m_xTransferable; }
+
+void LOKClipboard::setContents(
+    const Reference<css::datatransfer::XTransferable>& xTrans,
+    const Reference<css::datatransfer::clipboard::XClipboardOwner>& xClipboardOwner)
+{
+    osl::ClearableMutexGuard aGuard(m_aMutex);
+    Reference<datatransfer::clipboard::XClipboardOwner> xOldOwner(m_aOwner);
+    Reference<datatransfer::XTransferable> xOldContents(m_xTransferable);
+    m_xTransferable = xTrans;
+    m_aOwner = xClipboardOwner;
+
+    std::vector<Reference<datatransfer::clipboard::XClipboardListener>> aListeners(m_aListeners);
+    datatransfer::clipboard::ClipboardEvent aEv;
+    aEv.Contents = m_xTransferable;
+    SAL_INFO("lok", "Clip: " << this << " set contents to " << m_xTransferable);
+
+    aGuard.clear();
+
+    if (xOldOwner.is() && xOldOwner != xClipboardOwner)
+        xOldOwner->lostOwnership(this, xOldContents);
+    for (auto const& listener : aListeners)
+    {
+        listener->changedContents(aEv);
+    }
+}
+
+void LOKClipboard::addClipboardListener(
+    const Reference<datatransfer::clipboard::XClipboardListener>& listener)
+{
+    osl::ClearableMutexGuard aGuard(m_aMutex);
+    m_aListeners.push_back(listener);
+}
+
+void LOKClipboard::removeClipboardListener(
+    const Reference<datatransfer::clipboard::XClipboardListener>& listener)
+{
+    osl::ClearableMutexGuard aGuard(m_aMutex);
+    m_aListeners.erase(std::remove(m_aListeners.begin(), m_aListeners.end(), listener),
+                       m_aListeners.end());
+}
+LOKTransferable::LOKTransferable(const OUString& sMimeType,
+                                 const css::uno::Sequence<sal_Int8>& aSequence)
+{
+    m_aContent.reserve(1);
+    m_aFlavors = css::uno::Sequence<css::datatransfer::DataFlavor>(1);
+    initFlavourFromMime(m_aFlavors.getArray()[0], sMimeType);
+
+    uno::Any aContent;
+    if (m_aFlavors[0].DataType == cppu::UnoType<OUString>::get())
+    {
+        auto pText = reinterpret_cast<const char*>(aSequence.getConstArray());
+        aContent <<= OUString(pText, aSequence.getLength(), RTL_TEXTENCODING_UTF8);
+    }
+    else
+        aContent <<= aSequence;
+    m_aContent.push_back(aContent);
+}
+
+/// Use to ensure we have some dummy content on the clipboard to allow a 1st 'paste'
+LOKTransferable::LOKTransferable()
+{
+    m_aContent.reserve(1);
+    m_aFlavors = css::uno::Sequence<css::datatransfer::DataFlavor>(1);
+    initFlavourFromMime(m_aFlavors.getArray()[0], "text/plain");
+    uno::Any aContent;
+    aContent <<= OUString();
+    m_aContent.push_back(aContent);
+}
+
+// cf. sot/source/base/exchange.cxx for these two exceptional types.
+void LOKTransferable::initFlavourFromMime(css::datatransfer::DataFlavor& rFlavor,
+                                          OUString aMimeType)
+{
+    if (aMimeType.startsWith("text/plain"))
+    {
+        aMimeType = "text/plain;charset=utf-16";
+        rFlavor.DataType = cppu::UnoType<OUString>::get();
+    }
+    else if (aMimeType == "application/x-libreoffice-tsvc")
+        rFlavor.DataType = cppu::UnoType<OUString>::get();
+    else
+        rFlavor.DataType = cppu::UnoType<uno::Sequence<sal_Int8>>::get();
+    rFlavor.MimeType = aMimeType;
+    rFlavor.HumanPresentableName = aMimeType;
+}
+
+LOKTransferable::LOKTransferable(const size_t nInCount, const char** pInMimeTypes,
+                                 const size_t* pInSizes, const char** pInStreams)
+{
+    m_aContent.reserve(nInCount);
+    m_aFlavors = css::uno::Sequence<css::datatransfer::DataFlavor>(nInCount);
+    auto p_aFlavors = m_aFlavors.getArray();
+    for (size_t i = 0; i < nInCount; ++i)
+    {
+        initFlavourFromMime(p_aFlavors[i], OUString::fromUtf8(pInMimeTypes[i]));
+
+        uno::Any aContent;
+        if (m_aFlavors[i].DataType == cppu::UnoType<OUString>::get())
+            aContent <<= OUString(pInStreams[i], pInSizes[i], RTL_TEXTENCODING_UTF8);
+        else
+            aContent <<= css::uno::Sequence<sal_Int8>(
+                reinterpret_cast<const sal_Int8*>(pInStreams[i]), pInSizes[i]);
+        m_aContent.push_back(aContent);
+    }
+}
+
+uno::Any SAL_CALL LOKTransferable::getTransferData(const datatransfer::DataFlavor& rFlavor)
+{
+    assert(m_aContent.size() == static_cast<size_t>(m_aFlavors.getLength()));
+    for (size_t i = 0; i < m_aContent.size(); ++i)
+    {
+        if (m_aFlavors[i].MimeType == rFlavor.MimeType)
+        {
+            if (m_aFlavors[i].DataType != rFlavor.DataType)
+                SAL_WARN("lok", "Horror type mismatch!");
+            return m_aContent[i];
+        }
+    }
+    return {};
+}
+
+uno::Sequence<datatransfer::DataFlavor> SAL_CALL LOKTransferable::getTransferDataFlavors()
+{
+    return m_aFlavors;
+}
+
+sal_Bool SAL_CALL LOKTransferable::isDataFlavorSupported(const datatransfer::DataFlavor& rFlavor)
+{
+    return std::find_if(std::cbegin(m_aFlavors), std::cend(m_aFlavors),
+                        [&rFlavor](const datatransfer::DataFlavor& i) {
+                            return i.MimeType == rFlavor.MimeType && i.DataType == rFlavor.DataType;
+                        })
+           != std::cend(m_aFlavors);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/lib/lokclipboard.hxx b/desktop/source/lib/lokclipboard.hxx
new file mode 100644
index 000000000..699830756
--- /dev/null
+++ b/desktop/source/lib/lokclipboard.hxx
@@ -0,0 +1,114 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <vector>
+
+#include <rtl/ref.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <com/sun/star/datatransfer/clipboard/XSystemClipboard.hpp>
+
+using namespace css::uno;
+
+/// A clipboard implementation for LibreOfficeKit.
+class LOKClipboard final
+    : public cppu::WeakComponentImplHelper<css::datatransfer::clipboard::XSystemClipboard,
+                                           css::lang::XServiceInfo>
+{
+    osl::Mutex m_aMutex;
+    css::uno::Reference<css::datatransfer::XTransferable> m_xTransferable;
+    css::uno::Reference<css::datatransfer::clipboard::XClipboardOwner> m_aOwner;
+    std::vector<css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>> m_aListeners;
+
+public:
+    LOKClipboard();
+
+    /// get an XInterface easily.
+    css::uno::Reference<css::uno::XInterface> getXI()
+    {
+        return { static_cast<cppu::OWeakObject*>(this) };
+    }
+
+    // XServiceInfo
+    OUString SAL_CALL getImplementationName() override;
+    sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
+    Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+    static Sequence<OUString> getSupportedServiceNames_static();
+
+    // XClipboard
+    css::uno::Reference<css::datatransfer::XTransferable> SAL_CALL getContents() override;
+    void SAL_CALL setContents(
+        const css::uno::Reference<css::datatransfer::XTransferable>& xTransferable,
+        const css::uno::Reference<css::datatransfer::clipboard::XClipboardOwner>& xClipboardOwner)
+        override;
+    OUString SAL_CALL getName() override { return "CLIPBOARD"; }
+
+    // XClipboardEx
+    sal_Int8 SAL_CALL getRenderingCapabilities() override { return 0; }
+
+    // XClipboardNotifier
+    void SAL_CALL addClipboardListener(
+        const css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>& listener)
+        override;
+    void SAL_CALL removeClipboardListener(
+        const css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>& listener)
+        override;
+};
+
+/// Represents the contents of LOKClipboard.
+class LOKTransferable : public cppu::WeakImplHelper<css::datatransfer::XTransferable>
+{
+    css::uno::Sequence<css::datatransfer::DataFlavor> m_aFlavors;
+    std::vector<css::uno::Any> m_aContent;
+
+    static void initFlavourFromMime(css::datatransfer::DataFlavor& rFlavor, OUString aMimeType);
+
+public:
+    LOKTransferable();
+    LOKTransferable(size_t nInCount, const char** pInMimeTypes, const size_t* pInSizes,
+                    const char** pInStreams);
+    LOKTransferable(const OUString& sMimeType, const css::uno::Sequence<sal_Int8>& aSequence);
+
+    css::uno::Any SAL_CALL getTransferData(const css::datatransfer::DataFlavor& rFlavor) override;
+
+    css::uno::Sequence<css::datatransfer::DataFlavor> SAL_CALL getTransferDataFlavors() override;
+
+    sal_Bool SAL_CALL isDataFlavorSupported(const css::datatransfer::DataFlavor& rFlavor) override;
+};
+
+/// Theoretically to hook into the (horrible) vcl dtranscomp.cxx code.
+class LOKClipboardFactory : public ::cppu::WeakComponentImplHelper<css::lang::XSingleServiceFactory>
+{
+    static osl::Mutex gMutex;
+
+public:
+    LOKClipboardFactory()
+        : cppu::WeakComponentImplHelper<css::lang::XSingleServiceFactory>(gMutex)
+    {
+    }
+
+    css::uno::Reference<css::uno::XInterface> SAL_CALL createInstance() override
+    {
+        return createInstanceWithArguments(css::uno::Sequence<css::uno::Any>());
+    }
+    css::uno::Reference<css::uno::XInterface> SAL_CALL
+    createInstanceWithArguments(const css::uno::Sequence<css::uno::Any>& /* rArgs */) override;
+
+    /// Fetch clipboard from the global pool.
+    static rtl::Reference<LOKClipboard> getClipboardForCurView();
+
+    /// Release a clipboard before its document dies, nViewId of -1 clears all.
+    static void releaseClipboardForView(int nViewId);
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/lib/lokinteractionhandler.cxx b/desktop/source/lib/lokinteractionhandler.cxx
new file mode 100644
index 000000000..09ee2aaa9
--- /dev/null
+++ b/desktop/source/lib/lokinteractionhandler.cxx
@@ -0,0 +1,412 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "lokinteractionhandler.hxx"
+
+#include <comphelper/processfactory.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <com/sun/star/task/XInteractionAbort.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+#include <com/sun/star/task/XInteractionPassword2.hpp>
+#include <com/sun/star/task/DocumentMacroConfirmationRequest.hpp>
+#include <com/sun/star/task/InteractionHandler.hpp>
+#include <com/sun/star/ucb/InteractiveNetworkConnectException.hpp>
+#include <com/sun/star/ucb/InteractiveNetworkOffLineException.hpp>
+
+#include <com/sun/star/ucb/InteractiveIOException.hpp>
+#include <com/sun/star/ucb/InteractiveNetworkReadException.hpp>
+#include <com/sun/star/ucb/InteractiveNetworkResolveNameException.hpp>
+#include <com/sun/star/ucb/InteractiveNetworkWriteException.hpp>
+
+#include <com/sun/star/task/DocumentPasswordRequest2.hpp>
+#include <com/sun/star/task/DocumentMSPasswordRequest2.hpp>
+
+#include <com/sun/star/document/FilterOptionsRequest.hpp>
+
+#include "../../inc/lib/init.hxx"
+
+#include <LibreOfficeKit/LibreOfficeKitEnums.h>
+#include <sfx2/lokhelper.hxx>
+#include <sfx2/viewsh.hxx>
+#include <utility>
+#include <vcl/svapp.hxx>
+
+#include <tools/json_writer.hxx>
+
+using namespace com::sun::star;
+
+LOKInteractionHandler::LOKInteractionHandler(
+        OString command,
+        desktop::LibLibreOffice_Impl *const pLOKit,
+        desktop::LibLODocument_Impl *const pLOKDocument)
+    : m_pLOKit(pLOKit)
+    , m_pLOKDocument(pLOKDocument)
+    , m_command(std::move(command))
+    , m_usePassword(false)
+{
+    assert(m_pLOKit);
+}
+
+LOKInteractionHandler::~LOKInteractionHandler()
+{
+}
+
+OUString SAL_CALL LOKInteractionHandler::getImplementationName()
+{
+    return "com.sun.star.comp.uui.LOKInteractionHandler";
+}
+
+sal_Bool SAL_CALL LOKInteractionHandler::supportsService(OUString const & rServiceName)
+{
+    return cppu::supportsService(this, rServiceName);
+}
+
+uno::Sequence< OUString > SAL_CALL LOKInteractionHandler::getSupportedServiceNames()
+{
+    return { "com.sun.star.task.InteractionHandler",
+             // added to indicate support for configuration.backend.MergeRecoveryRequest
+             "com.sun.star.configuration.backend.InteractionHandler",
+              // for backwards compatibility
+             "com.sun.star.uui.InteractionHandler" };
+}
+
+void SAL_CALL LOKInteractionHandler::initialize(uno::Sequence<uno::Any> const & /*rArguments*/)
+{
+}
+
+void SAL_CALL LOKInteractionHandler::handle(
+        uno::Reference<task::XInteractionRequest> const & xRequest)
+{
+    // just do the same thing in both cases
+    handleInteractionRequest(xRequest);
+}
+
+void LOKInteractionHandler::postError(css::task::InteractionClassification classif, const char* kind, ErrCode code, const OUString &message)
+{
+    std::string classification = "error";
+    switch (classif)
+    {
+        case task::InteractionClassification_ERROR: break;
+        case task::InteractionClassification_WARNING: classification = "warning"; break;
+        case task::InteractionClassification_INFO: classification = "info"; break;
+        case task::InteractionClassification_QUERY: classification = "query"; break;
+        default: assert(false); break;
+    }
+
+    // create the JSON representation
+    tools::JsonWriter aJson;
+    aJson.put("classification", classification);
+    aJson.put("cmd", m_command.getStr());
+    aJson.put("kind", kind);
+    aJson.put("code", static_cast<sal_uInt32>(code));
+    aJson.put("message", message.toUtf8());
+
+    std::size_t nView = SfxViewShell::Current() ? SfxLokHelper::getView() : 0;
+    if (m_pLOKDocument && m_pLOKDocument->mpCallbackFlushHandlers.count(nView))
+        m_pLOKDocument->mpCallbackFlushHandlers[nView]->queue(LOK_CALLBACK_ERROR, aJson.extractAsOString().getStr());
+    else if (m_pLOKit->mpCallback)
+        m_pLOKit->mpCallback(LOK_CALLBACK_ERROR, aJson.extractAsOString().getStr(), m_pLOKit->mpCallbackData);
+}
+
+namespace {
+
+/// Just approve the interaction.
+void selectApproved(uno::Sequence<uno::Reference<task::XInteractionContinuation>> const &rContinuations)
+{
+    for (auto const & c : rContinuations)
+    {
+        uno::Reference<task::XInteractionApprove> xApprove(c, uno::UNO_QUERY);
+        if (xApprove.is())
+            xApprove->select();
+    }
+}
+
+}
+
+bool LOKInteractionHandler::handleIOException(const css::uno::Sequence<css::uno::Reference<css::task::XInteractionContinuation>> &rContinuations, const css::uno::Any& rRequest)
+{
+    ucb::InteractiveIOException aIoException;
+    if (!(rRequest >>= aIoException))
+        return false;
+
+    static ErrCode const aErrorCode[int(ucb::IOErrorCode_WRONG_VERSION) + 1] =
+    {
+        ERRCODE_IO_ABORT,
+        ERRCODE_IO_ACCESSDENIED,
+        ERRCODE_IO_ALREADYEXISTS,
+        ERRCODE_IO_BADCRC,
+        ERRCODE_IO_CANTCREATE,
+        ERRCODE_IO_CANTREAD,
+        ERRCODE_IO_CANTSEEK,
+        ERRCODE_IO_CANTTELL,
+        ERRCODE_IO_CANTWRITE,
+        ERRCODE_IO_CURRENTDIR,
+        ERRCODE_IO_DEVICENOTREADY,
+        ERRCODE_IO_NOTSAMEDEVICE,
+        ERRCODE_IO_GENERAL,
+        ERRCODE_IO_INVALIDACCESS,
+        ERRCODE_IO_INVALIDCHAR,
+        ERRCODE_IO_INVALIDDEVICE,
+        ERRCODE_IO_INVALIDLENGTH,
+        ERRCODE_IO_INVALIDPARAMETER,
+        ERRCODE_IO_ISWILDCARD,
+        ERRCODE_IO_LOCKVIOLATION,
+        ERRCODE_IO_MISPLACEDCHAR,
+        ERRCODE_IO_NAMETOOLONG,
+        ERRCODE_IO_NOTEXISTS,
+        ERRCODE_IO_NOTEXISTSPATH,
+        ERRCODE_IO_NOTSUPPORTED,
+        ERRCODE_IO_NOTADIRECTORY,
+        ERRCODE_IO_NOTAFILE,
+        ERRCODE_IO_OUTOFSPACE,
+        ERRCODE_IO_TOOMANYOPENFILES,
+        ERRCODE_IO_OUTOFMEMORY,
+        ERRCODE_IO_PENDING,
+        ERRCODE_IO_RECURSIVE,
+        ERRCODE_IO_UNKNOWN,
+        ERRCODE_IO_WRITEPROTECTED,
+        ERRCODE_IO_WRONGFORMAT,
+        ERRCODE_IO_WRONGVERSION,
+    };
+
+    postError(aIoException.Classification, "io", aErrorCode[static_cast<int>(aIoException.Code)], "");
+    selectApproved(rContinuations);
+
+    return true;
+}
+
+bool LOKInteractionHandler::handleNetworkException(const uno::Sequence<uno::Reference<task::XInteractionContinuation>> &rContinuations, const uno::Any &rRequest)
+{
+    ucb::InteractiveNetworkException aNetworkException;
+    if (!(rRequest >>= aNetworkException))
+        return false;
+
+    ErrCode nErrorCode;
+    OUString aMessage;
+
+    ucb::InteractiveNetworkOffLineException aOffLineException;
+    ucb::InteractiveNetworkResolveNameException aResolveNameException;
+    ucb::InteractiveNetworkConnectException aConnectException;
+    ucb::InteractiveNetworkReadException aReadException;
+    ucb::InteractiveNetworkWriteException aWriteException;
+    if (rRequest >>= aOffLineException)
+    {
+        nErrorCode = ERRCODE_INET_OFFLINE;
+    }
+    else if (rRequest >>= aResolveNameException)
+    {
+        nErrorCode = ERRCODE_INET_NAME_RESOLVE;
+        aMessage = aResolveNameException.Server;
+    }
+    else if (rRequest >>= aConnectException)
+    {
+        nErrorCode = ERRCODE_INET_CONNECT;
+        aMessage = aConnectException.Server;
+    }
+    else if (rRequest >>= aReadException)
+    {
+        nErrorCode = ERRCODE_INET_READ;
+        aMessage = aReadException.Diagnostic;
+    }
+    else if (rRequest >>= aWriteException)
+    {
+        nErrorCode = ERRCODE_INET_WRITE;
+        aMessage = aWriteException.Diagnostic;
+    }
+    else
+    {
+        nErrorCode = ERRCODE_INET_GENERAL;
+    }
+
+    postError(aNetworkException.Classification, "network", nErrorCode, aMessage);
+    selectApproved(rContinuations);
+
+    return true;
+}
+
+bool LOKInteractionHandler::handlePasswordRequest(const uno::Sequence<uno::Reference<task::XInteractionContinuation>> &rContinuations, const uno::Any &rRequest)
+{
+    bool bPasswordRequestFound = false;
+    bool bIsRequestPasswordToModify = false;
+
+    OString sUrl;
+
+    task::DocumentPasswordRequest passwordRequest;
+    if (rRequest >>= passwordRequest)
+    {
+        bIsRequestPasswordToModify = false;
+        sUrl = passwordRequest.Name.toUtf8();
+        bPasswordRequestFound = true;
+    }
+
+    task::DocumentPasswordRequest2 passwordRequest2;
+    if (rRequest >>= passwordRequest2)
+    {
+        bIsRequestPasswordToModify = passwordRequest2.IsRequestPasswordToModify;
+        sUrl = passwordRequest2.Name.toUtf8();
+        bPasswordRequestFound = true;
+    }
+
+    task::DocumentMSPasswordRequest2 passwordMSRequest;
+    if (rRequest >>= passwordMSRequest)
+    {
+        bIsRequestPasswordToModify = passwordMSRequest.IsRequestPasswordToModify;
+        sUrl = passwordMSRequest.Name.toUtf8();
+        bPasswordRequestFound = true;
+    }
+
+    if (!bPasswordRequestFound)
+        return false;
+
+    if (m_pLOKit->mpCallback &&
+        m_pLOKit->hasOptionalFeature(bIsRequestPasswordToModify ? LOK_FEATURE_DOCUMENT_PASSWORD_TO_MODIFY
+                                                                : LOK_FEATURE_DOCUMENT_PASSWORD))
+    {
+        // release SolarMutex, so the callback handler, which may run in another thread,
+        // can acquire it in 'lo_setDocumentPassword'
+        SolarMutexReleaser aReleaser;
+        m_pLOKit->mpCallback(bIsRequestPasswordToModify ? LOK_CALLBACK_DOCUMENT_PASSWORD_TO_MODIFY
+                                                        : LOK_CALLBACK_DOCUMENT_PASSWORD,
+                sUrl.getStr(),
+                m_pLOKit->mpCallbackData);
+
+        // block until SetPassword is called
+        m_havePassword.wait();
+        m_havePassword.reset();
+    }
+
+    for (auto const & cont : rContinuations)
+    {
+        if (m_usePassword)
+        {
+            if (bIsRequestPasswordToModify)
+            {
+                uno::Reference<task::XInteractionPassword2> const xIPW2(cont, uno::UNO_QUERY);
+                xIPW2->setPasswordToModify(m_Password);
+                xIPW2->select();
+            }
+            else
+            {
+                uno::Reference<task::XInteractionPassword> const xIPW(cont, uno::UNO_QUERY);
+                if (xIPW.is())
+                {
+                    xIPW->setPassword(m_Password);
+                    xIPW->select();
+                }
+            }
+        }
+        else
+        {
+            if (bIsRequestPasswordToModify)
+            {
+                uno::Reference<task::XInteractionPassword2> const xIPW2(cont, uno::UNO_QUERY);
+                xIPW2->setRecommendReadOnly(true);
+                xIPW2->select();
+            }
+            else
+            {
+                uno::Reference<task::XInteractionAbort> const xAbort(cont, uno::UNO_QUERY);
+                if (xAbort.is())
+                {
+                    xAbort->select();
+                }
+            }
+        }
+    }
+    return true;
+}
+
+bool LOKInteractionHandler::handleMacroConfirmationRequest(const uno::Reference<task::XInteractionRequest>& xRequest)
+{
+    uno::Any const request(xRequest->getRequest());
+
+    task::DocumentMacroConfirmationRequest aConfirmRequest;
+    if (request >>= aConfirmRequest)
+    {
+        auto xInteraction(task::InteractionHandler::createWithParent(comphelper::getProcessComponentContext(), nullptr));
+
+        if (xInteraction.is())
+            xInteraction->handleInteractionRequest(xRequest);
+
+        return true;
+    }
+    return false;
+}
+
+bool LOKInteractionHandler::handleFilterOptionsRequest(const uno::Reference<task::XInteractionRequest>& xRequest)
+{
+    document::FilterOptionsRequest aFilterOptionsRequest;
+    uno::Any const request(xRequest->getRequest());
+    if (request >>= aFilterOptionsRequest)
+    {
+        uno::Reference< task::XInteractionHandler2 > xInteraction(
+            task::InteractionHandler::createWithParent(
+                ::comphelper::getProcessComponentContext(), nullptr));
+
+        if (xInteraction.is())
+            xInteraction->handleInteractionRequest(xRequest);
+
+        return true;
+    }
+    return false;
+}
+
+sal_Bool SAL_CALL LOKInteractionHandler::handleInteractionRequest(
+        const uno::Reference<task::XInteractionRequest>& xRequest)
+{
+    uno::Sequence<uno::Reference<task::XInteractionContinuation>> const &rContinuations = xRequest->getContinuations();
+    uno::Any const request(xRequest->getRequest());
+
+    if (handleIOException(rContinuations, request))
+        return true;
+
+    if (handleNetworkException(rContinuations, request))
+        return true;
+
+    if (handlePasswordRequest(rContinuations, request))
+        return true;
+
+    if (handleFilterOptionsRequest(xRequest))
+        return true;
+
+    if (handleMacroConfirmationRequest(xRequest))
+        return true;
+
+    // TODO: perform more interactions 'for real' like the above
+    selectApproved(rContinuations);
+
+    return true;
+}
+
+void LOKInteractionHandler::SetPassword(char const*const pPassword)
+{
+    if (pPassword)
+    {
+        m_Password = OUString(pPassword, strlen(pPassword), RTL_TEXTENCODING_UTF8);
+        m_usePassword = true;
+    }
+    else
+    {
+        m_usePassword = false;
+    }
+    m_havePassword.set();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/lib/lokinteractionhandler.hxx b/desktop/source/lib/lokinteractionhandler.hxx
new file mode 100644
index 000000000..61524a6c1
--- /dev/null
+++ b/desktop/source/lib/lokinteractionhandler.hxx
@@ -0,0 +1,104 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <osl/conditn.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <vcl/errcode.hxx>
+
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/task/InteractionClassification.hpp>
+#include <com/sun/star/task/XInteractionHandler2.hpp>
+
+namespace desktop {
+    struct LibLibreOffice_Impl;
+    struct LibLODocument_Impl;
+}
+
+/** InteractionHandler is an interface that provides the user with various dialogs / error messages.
+
+We need an own implementation for the LibreOfficeKit so that we can route the
+information easily via callbacks.
+
+TODO: the callbacks are not implemented yet, we just approve any interaction
+that we get.
+*/
+class LOKInteractionHandler: public cppu::WeakImplHelper<com::sun::star::lang::XServiceInfo,
+                                                         com::sun::star::lang::XInitialization,
+                                                         com::sun::star::task::XInteractionHandler2>
+{
+private:
+    desktop::LibLibreOffice_Impl * m_pLOKit;
+    desktop::LibLODocument_Impl * m_pLOKDocument;
+
+    /// Command for which we use this interaction handler (like "load", "save", "saveas", ...)
+    OString m_command;
+
+    OUString m_Password;
+    bool m_usePassword;
+    osl::Condition m_havePassword;
+
+    LOKInteractionHandler(const LOKInteractionHandler&) = delete;
+    LOKInteractionHandler& operator=(const LOKInteractionHandler&) = delete;
+
+    /** Call the LOK_CALLBACK_ERROR on the LOK document (if available) or LOK lib.
+
+        The error itself is a JSON message, like:
+        {
+            "classification": "error" | "warning" | "info"
+            "kind": "network" etc.
+            "code": 403 | 404 | ...
+            "message": freeform description
+        }
+    */
+    void postError(css::task::InteractionClassification classif, const char* kind, ErrCode code, const OUString &message);
+
+    bool handleIOException(const css::uno::Sequence<css::uno::Reference<css::task::XInteractionContinuation>> &rContinuations, const css::uno::Any& rRequest);
+    bool handleNetworkException(const css::uno::Sequence<css::uno::Reference<css::task::XInteractionContinuation>> &rContinuations, const css::uno::Any& rRequest);
+    bool handlePasswordRequest(const css::uno::Sequence<css::uno::Reference<css::task::XInteractionContinuation>> &rContinuations, const css::uno::Any& rRequest);
+    static bool handleMacroConfirmationRequest(const css::uno::Reference<css::task::XInteractionRequest>& xRequest);
+
+    static bool handleFilterOptionsRequest(const ::com::sun::star::uno::Reference<::com::sun::star::task::XInteractionRequest>& Request);
+
+public:
+    void SetPassword(char const* pPassword);
+
+    explicit LOKInteractionHandler(
+            OString command,
+            desktop::LibLibreOffice_Impl *,
+            desktop::LibLODocument_Impl *pLOKDocumt = nullptr);
+
+    virtual ~LOKInteractionHandler() override;
+
+    virtual OUString SAL_CALL getImplementationName() override;
+
+    virtual sal_Bool SAL_CALL supportsService(OUString const & rServiceName) override;
+
+    virtual com::sun::star::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+    virtual void SAL_CALL initialize(com::sun::star::uno::Sequence<com::sun::star::uno::Any > const & rArguments) override;
+
+    virtual void SAL_CALL handle(com::sun::star::uno::Reference<com::sun::star::task::XInteractionRequest> const & rRequest) override;
+
+    virtual sal_Bool SAL_CALL handleInteractionRequest(const ::com::sun::star::uno::Reference<::com::sun::star::task::XInteractionRequest>& Request) override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/migration/migration.cxx b/desktop/source/migration/migration.cxx
new file mode 100644
index 000000000..524ca8615
--- /dev/null
+++ b/desktop/source/migration/migration.cxx
@@ -0,0 +1,1111 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <algorithm>
+#include <iterator>
+#include <map>
+#include <set>
+
+#include <migration.hxx>
+#include "migration_impl.hxx"
+
+#include <sal/log.hxx>
+#include <unotools/textsearch.hxx>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/sequence.hxx>
+#include <unotools/bootstrap.hxx>
+#include <rtl/uri.hxx>
+#include <i18nlangtag/lang.h>
+#include <tools/diagnose_ex.h>
+#include <tools/urlobj.hxx>
+#include <osl/file.hxx>
+#include <osl/security.hxx>
+#include <unotools/configmgr.hxx>
+
+#include <com/sun/star/configuration/Update.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/task/XJob.hpp>
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/util/XRefreshable.hpp>
+#include <com/sun/star/util/XChangesBatch.hpp>
+#include <com/sun/star/embed/ElementModes.hpp>
+#include <com/sun/star/embed/FileSystemStorageFactory.hpp>
+#include <com/sun/star/embed/XStorage.hpp>
+#include <com/sun/star/ui/theModuleUIConfigurationManagerSupplier.hpp>
+#include <com/sun/star/ui/UIConfigurationManager.hpp>
+#include <com/sun/star/ui/XUIConfigurationPersistence.hpp>
+#include <vcl/commandinfoprovider.hxx>
+
+using namespace osl;
+using namespace com::sun::star::task;
+using namespace com::sun::star::lang;
+using namespace com::sun::star::beans;
+using namespace com::sun::star::util;
+using namespace com::sun::star::container;
+using com::sun::star::uno::Exception;
+using namespace com::sun::star;
+
+
+namespace desktop
+{
+
+constexpr OUStringLiteral ITEM_DESCRIPTOR_COMMANDURL = u"CommandURL";
+constexpr OUStringLiteral ITEM_DESCRIPTOR_CONTAINER = u"ItemDescriptorContainer";
+constexpr OUStringLiteral ITEM_DESCRIPTOR_LABEL = u"Label";
+
+static OUString mapModuleShortNameToIdentifier(std::u16string_view sShortName)
+{
+    OUString sIdentifier;
+
+    if ( sShortName == u"StartModule" )
+        sIdentifier = "com.sun.star.frame.StartModule";
+
+    else if ( sShortName == u"swriter" )
+        sIdentifier = "com.sun.star.text.TextDocument";
+
+    else if ( sShortName == u"scalc" )
+        sIdentifier = "com.sun.star.sheet.SpreadsheetDocument";
+
+    else if ( sShortName == u"sdraw" )
+        sIdentifier = "com.sun.star.drawing.DrawingDocument";
+
+    else if ( sShortName == u"simpress" )
+        sIdentifier = "com.sun.star.presentation.PresentationDocument";
+
+    else if ( sShortName == u"smath" )
+        sIdentifier = "com.sun.star.formula.FormulaProperties";
+
+    else if ( sShortName == u"schart" )
+        sIdentifier = "com.sun.star.chart2.ChartDocument";
+
+    else if ( sShortName == u"BasicIDE" )
+        sIdentifier = "com.sun.star.script.BasicIDE";
+
+    else if ( sShortName == u"dbapp" )
+        sIdentifier = "com.sun.star.sdb.OfficeDatabaseDocument";
+
+    else if ( sShortName == u"sglobal" )
+        sIdentifier = "com.sun.star.text.GlobalDocument";
+
+    else if ( sShortName == u"sweb" )
+        sIdentifier = "com.sun.star.text.WebDocument";
+
+    else if ( sShortName == u"swxform" )
+        sIdentifier = "com.sun.star.xforms.XMLFormDocument";
+
+    else if ( sShortName == u"sbibliography" )
+        sIdentifier = "com.sun.star.frame.Bibliography";
+
+    return sIdentifier;
+}
+
+bool MigrationImpl::alreadyMigrated()
+{
+    OUString aStr = m_aInfo.userdata + "/MIGRATED4";
+    File aFile(aStr);
+    // create migration stamp, and/or check its existence
+    bool bRet = aFile.open (osl_File_OpenFlag_Write | osl_File_OpenFlag_Create | osl_File_OpenFlag_NoLock) == FileBase::E_EXIST;
+    SAL_INFO( "desktop.migration", "File '" << aStr << "' exists? " << bRet );
+    return bRet;
+}
+
+bool MigrationImpl::initializeMigration()
+{
+    bool bRet = false;
+
+    if (!checkMigrationCompleted()) {
+        readAvailableMigrations(m_vMigrationsAvailable);
+        sal_Int32 nIndex = findPreferredMigrationProcess(m_vMigrationsAvailable);
+        // m_aInfo is now set to the preferred migration source
+        if ( nIndex >= 0 ) {
+            if (alreadyMigrated())
+                return false;
+            m_vrMigrations = readMigrationSteps(m_vMigrationsAvailable[nIndex].name);
+        }
+
+        bRet = !m_aInfo.userdata.isEmpty();
+    }
+
+    SAL_INFO( "desktop.migration", "Migration " << ( bRet ? "needed" : "not required" ) );
+
+    return bRet;
+}
+
+void Migration::migrateSettingsIfNecessary()
+{
+    MigrationImpl aImpl;
+
+    if (! aImpl.initializeMigration() )
+        return;
+
+    bool bResult = false;
+    try {
+        bResult = aImpl.doMigration();
+    } catch (const Exception&) {
+        TOOLS_WARN_EXCEPTION( "desktop", "doMigration()");
+    }
+    OSL_ENSURE(bResult, "Migration has not been successful");
+}
+
+MigrationImpl::MigrationImpl()
+{
+}
+
+MigrationImpl::~MigrationImpl()
+{
+}
+
+// The main entry point for migrating settings
+bool MigrationImpl::doMigration()
+{
+    // compile file list for migration
+    m_vrFileList = compileFileList();
+
+    bool result = false;
+    try {
+        NewVersionUIInfo aNewVersionUIInfo;
+        std::vector< MigrationModuleInfo > vModulesInfo = detectUIChangesForAllModules();
+        aNewVersionUIInfo.init(vModulesInfo);
+
+        copyFiles();
+
+        static const OUStringLiteral sMenubarResourceURL(u"private:resource/menubar/menubar");
+        static const OUStringLiteral sToolbarResourcePre(u"private:resource/toolbar/");
+        for (MigrationModuleInfo & i : vModulesInfo) {
+            OUString sModuleIdentifier = mapModuleShortNameToIdentifier(i.sModuleShortName);
+            if (sModuleIdentifier.isEmpty())
+                continue;
+
+
+            OUString aOldCfgDataPath = m_aInfo.userdata + "/user/config/soffice.cfg/modules/" + i.sModuleShortName;
+            uno::Sequence< uno::Any > lArgs {uno::Any(aOldCfgDataPath), uno::Any(embed::ElementModes::READ)};
+
+            uno::Reference< uno::XComponentContext > xContext(comphelper::getProcessComponentContext());
+            uno::Reference< lang::XSingleServiceFactory > xStorageFactory(embed::FileSystemStorageFactory::create(xContext));
+            uno::Reference< embed::XStorage >             xModules(xStorageFactory->createInstanceWithArguments(lArgs), uno::UNO_QUERY);
+            uno::Reference< ui::XUIConfigurationManager2 > xOldCfgManager = ui::UIConfigurationManager::create(xContext);
+
+            if ( xModules.is() ) {
+                xOldCfgManager->setStorage( xModules );
+                xOldCfgManager->reload();
+            }
+
+            uno::Reference< ui::XUIConfigurationManager > xCfgManager = aNewVersionUIInfo.getConfigManager(i.sModuleShortName);
+
+            if (i.bHasMenubar) {
+                uno::Reference< container::XIndexContainer > xOldVersionMenuSettings(xOldCfgManager->getSettings(sMenubarResourceURL, true), uno::UNO_QUERY);
+                uno::Reference< container::XIndexContainer > xNewVersionMenuSettings = aNewVersionUIInfo.getNewMenubarSettings(i.sModuleShortName);
+                compareOldAndNewConfig(OUString(), xOldVersionMenuSettings, xNewVersionMenuSettings, sMenubarResourceURL);
+                mergeOldToNewVersion(xCfgManager, xNewVersionMenuSettings, sModuleIdentifier, sMenubarResourceURL);
+            }
+
+            sal_Int32 nToolbars = i.m_vToolbars.size();
+            if (nToolbars >0) {
+                for (sal_Int32 j=0; j<nToolbars; ++j) {
+                    OUString sToolbarName = i.m_vToolbars[j];
+                    OUString sToolbarResourceURL = sToolbarResourcePre + sToolbarName;
+
+                    uno::Reference< container::XIndexContainer > xOldVersionToolbarSettings(xOldCfgManager->getSettings(sToolbarResourceURL, true), uno::UNO_QUERY);
+                    uno::Reference< container::XIndexContainer > xNewVersionToolbarSettings = aNewVersionUIInfo.getNewToolbarSettings(i.sModuleShortName, sToolbarName);
+                    compareOldAndNewConfig(OUString(), xOldVersionToolbarSettings, xNewVersionToolbarSettings, sToolbarResourceURL);
+                    mergeOldToNewVersion(xCfgManager, xNewVersionToolbarSettings, sModuleIdentifier, sToolbarResourceURL);
+                }
+            }
+
+            m_aOldVersionItemsHashMap.clear();
+        }
+
+        // execute the migration items from Setup.xcu
+        copyConfig();
+
+        // execute custom migration services from Setup.xcu
+        // and refresh the cache
+        runServices();
+        uno::Reference< XRefreshable >(
+            configuration::theDefaultProvider::get(comphelper::getProcessComponentContext()),
+            uno::UNO_QUERY_THROW)->refresh();
+
+        result = true;
+    } catch (const css::uno::Exception &) {
+        TOOLS_WARN_EXCEPTION(
+            "desktop.migration",
+            "ignored Exception while migrating from version \"" << m_aInfo.productname
+            << "\" data \"" << m_aInfo.userdata << "\"");
+    }
+
+    // prevent running the migration multiple times
+    setMigrationCompleted();
+    return result;
+}
+
+void MigrationImpl::setMigrationCompleted()
+{
+    try {
+        uno::Reference< XPropertySet > aPropertySet(getConfigAccess("org.openoffice.Setup/Office", true), uno::UNO_QUERY_THROW);
+        aPropertySet->setPropertyValue("MigrationCompleted", uno::Any(true));
+        uno::Reference< XChangesBatch >(aPropertySet, uno::UNO_QUERY_THROW)->commitChanges();
+    } catch (...) {
+        // fail silently
+    }
+}
+
+bool MigrationImpl::checkMigrationCompleted()
+{
+    bool bMigrationCompleted = false;
+    try {
+        uno::Reference< XPropertySet > aPropertySet(
+            getConfigAccess("org.openoffice.Setup/Office"), uno::UNO_QUERY_THROW);
+        aPropertySet->getPropertyValue("MigrationCompleted") >>= bMigrationCompleted;
+
+        if( !bMigrationCompleted && getenv("SAL_DISABLE_USERMIGRATION" ) ) {
+            // migration prevented - fake its success
+            setMigrationCompleted();
+            bMigrationCompleted = true;
+        }
+    } catch (const Exception&) {
+        // just return false...
+    }
+    SAL_INFO( "desktop.migration", "Migration " << ( bMigrationCompleted ? "already completed" : "not done" ) );
+
+    return bMigrationCompleted;
+}
+
+static void insertSorted(migrations_available& rAvailableMigrations, supported_migration const & aSupportedMigration)
+{
+    migrations_available::iterator pIter = std::find_if(rAvailableMigrations.begin(), rAvailableMigrations.end(),
+        [&aSupportedMigration](const supported_migration& rMigration) { return rMigration.nPriority < aSupportedMigration.nPriority; });
+    if (pIter != rAvailableMigrations.end())
+        rAvailableMigrations.insert(pIter, aSupportedMigration );
+    else
+        rAvailableMigrations.push_back( aSupportedMigration );
+}
+
+void MigrationImpl::readAvailableMigrations(migrations_available& rAvailableMigrations)
+{
+    // get supported version names
+    uno::Reference< XNameAccess > aMigrationAccess(getConfigAccess("org.openoffice.Setup/Migration/SupportedVersions"), uno::UNO_SET_THROW);
+    const uno::Sequence< OUString > seqSupportedVersions = aMigrationAccess->getElementNames();
+
+    static const OUStringLiteral aVersionIdentifiers( u"VersionIdentifiers" );
+    static const OUStringLiteral aPriorityIdentifier( u"Priority" );
+
+    for (OUString const & supportedVersion :seqSupportedVersions) {
+        sal_Int32                 nPriority( 0 );
+        uno::Sequence< OUString > seqVersions;
+        uno::Reference< XNameAccess > xMigrationData( aMigrationAccess->getByName(supportedVersion), uno::UNO_QUERY_THROW );
+        xMigrationData->getByName( aVersionIdentifiers ) >>= seqVersions;
+        xMigrationData->getByName( aPriorityIdentifier ) >>= nPriority;
+
+        supported_migration aSupportedMigration;
+        aSupportedMigration.name      = supportedVersion;
+        aSupportedMigration.nPriority = nPriority;
+        for (OUString const & s : std::as_const(seqVersions))
+            aSupportedMigration.supported_versions.push_back(s.trim());
+        insertSorted( rAvailableMigrations, aSupportedMigration );
+        SAL_INFO( "desktop.migration", " available migration '" << aSupportedMigration.name << "'" );
+    }
+}
+
+migrations_vr MigrationImpl::readMigrationSteps(const OUString& rMigrationName)
+{
+    // get migration access
+    uno::Reference< XNameAccess > aMigrationAccess(getConfigAccess("org.openoffice.Setup/Migration/SupportedVersions"), uno::UNO_SET_THROW);
+    uno::Reference< XNameAccess > xMigrationData( aMigrationAccess->getByName(rMigrationName), uno::UNO_QUERY_THROW );
+
+    // get migration description from org.openoffice.Setup/Migration
+    // and build vector of migration steps
+    uno::Reference< XNameAccess > theNameAccess(xMigrationData->getByName("MigrationSteps"), uno::UNO_QUERY_THROW);
+    uno::Reference< XNameAccess > tmpAccess;
+    uno::Sequence< OUString > tmpSeq;
+    migrations_vr vrMigrations(new migrations_v);
+    const css::uno::Sequence<OUString> aMigrationSteps = theNameAccess->getElementNames();
+    for (const OUString& rMigrationStep : aMigrationSteps) {
+        // get current migration step
+        theNameAccess->getByName(rMigrationStep) >>= tmpAccess;
+        migration_step tmpStep;
+
+        // read included files from current step description
+        if (tmpAccess->getByName("IncludedFiles") >>= tmpSeq) {
+            for (const OUString& rSeqEntry : std::as_const(tmpSeq))
+                tmpStep.includeFiles.push_back(rSeqEntry);
+        }
+
+        // excluded files...
+        if (tmpAccess->getByName("ExcludedFiles") >>= tmpSeq) {
+            for (const OUString& rSeqEntry : std::as_const(tmpSeq))
+                tmpStep.excludeFiles.push_back(rSeqEntry);
+        }
+
+        // included nodes...
+        if (tmpAccess->getByName("IncludedNodes") >>= tmpSeq) {
+            for (const OUString& rSeqEntry : std::as_const(tmpSeq))
+                tmpStep.includeConfig.push_back(rSeqEntry);
+        }
+
+        // excluded nodes...
+        if (tmpAccess->getByName("ExcludedNodes") >>= tmpSeq) {
+            for (const OUString& rSeqEntry : std::as_const(tmpSeq))
+                tmpStep.excludeConfig.push_back(rSeqEntry);
+        }
+
+        // excluded extensions...
+        if (tmpAccess->getByName("ExcludedExtensions") >>= tmpSeq) {
+            for (const OUString& rSeqEntry : std::as_const(tmpSeq))
+                tmpStep.excludeExtensions.push_back(rSeqEntry);
+        }
+
+        // generic service
+        tmpAccess->getByName("MigrationService") >>= tmpStep.service;
+
+        vrMigrations->push_back(tmpStep);
+    }
+    return vrMigrations;
+}
+
+static FileBase::RC _checkAndCreateDirectory(INetURLObject const & dirURL)
+{
+    FileBase::RC result = Directory::create(dirURL.GetMainURL(INetURLObject::DecodeMechanism::ToIUri));
+    if (result == FileBase::E_NOENT) {
+        INetURLObject baseURL(dirURL);
+        baseURL.removeSegment();
+        _checkAndCreateDirectory(baseURL);
+        return Directory::create(dirURL.GetMainURL(INetURLObject::DecodeMechanism::ToIUri));
+    } else
+        return result;
+}
+
+#if defined UNX && ! defined MACOSX
+
+const char XDG_CONFIG_PART[] = "/.config/";
+
+OUString MigrationImpl::preXDGConfigDir(const OUString& rConfigDir)
+{
+    OUString aPreXDGConfigPath;
+    const char* pXDGCfgHome = getenv("XDG_CONFIG_HOME");
+
+    // cater for XDG_CONFIG_HOME change
+    // If XDG_CONFIG_HOME is set then we;
+    // assume the user knows what they are doing ( room for improvement here, we could
+    // of course search the default config dir etc. also  - but this is more complex,
+    // we would need to weigh results from the current config dir against matches in
+    // the 'old' config dir etc. ) - currently we just use the returned config dir.
+    // If XDG_CONFIG_HOME is NOT set;
+    // assume then we should now using the default $HOME/.config config location for
+    // our user profiles, however *all* previous libreoffice and openoffice.org
+    // configurations will be in the 'old' config directory and that's where we need
+    // to search - we convert the returned config dir to the 'old' dir
+    if ( !pXDGCfgHome && rConfigDir.endsWith( XDG_CONFIG_PART )  )
+        // remove trailing '.config/' but leave the terminating '/'
+        aPreXDGConfigPath = rConfigDir.copy( 0, rConfigDir.getLength() - sizeof(  XDG_CONFIG_PART ) + 2 );
+    else
+        aPreXDGConfigPath = rConfigDir;
+
+    // the application-specific config dir is no longer prefixed by '.' because it is hidden under ".config"
+    // we have to add the '.' for the pre-XDG directory names
+    aPreXDGConfigPath += ".";
+
+    return aPreXDGConfigPath;
+}
+#endif
+
+void MigrationImpl::setInstallInfoIfExist(
+    install_info& aInfo,
+    std::u16string_view rConfigDir,
+    const OUString& rVersion)
+{
+    OUString url(INetURLObject(rConfigDir).GetMainURL(INetURLObject::DecodeMechanism::NONE));
+    osl::DirectoryItem item;
+    osl::FileStatus stat(osl_FileStatus_Mask_Type);
+
+    if (osl::DirectoryItem::get(url, item) == osl::FileBase::E_None
+        && item.getFileStatus(stat) == osl::FileBase::E_None
+        && stat.getFileType() == osl::FileStatus::Directory) {
+        aInfo.userdata = url;
+        aInfo.productname = rVersion;
+    }
+}
+
+install_info MigrationImpl::findInstallation(const strings_v& rVersions)
+{
+
+    OUString aTopConfigDir;
+    osl::Security().getConfigDir( aTopConfigDir );
+    if ( !aTopConfigDir.isEmpty() && aTopConfigDir[ aTopConfigDir.getLength()-1 ] != '/' )
+        aTopConfigDir += "/";
+
+#if defined UNX && ! defined MACOSX
+    OUString aPreXDGTopConfigDir = preXDGConfigDir(aTopConfigDir);
+#endif
+
+    install_info aInfo;
+    for (auto const& elem : rVersions)
+    {
+        OUString aVersion, aProfileName;
+        sal_Int32 nSeparatorIndex = elem.indexOf('=');
+        if ( nSeparatorIndex != -1 ) {
+            aVersion = elem.copy( 0, nSeparatorIndex );
+            aProfileName = elem.copy( nSeparatorIndex+1 );
+        }
+
+        if ( !aVersion.isEmpty() && !aProfileName.isEmpty() &&
+             ( aInfo.userdata.isEmpty() ||
+               aProfileName.equalsIgnoreAsciiCase(
+                   utl::ConfigManager::getProductName() ) ) ) {
+            setInstallInfoIfExist(aInfo, OUStringConcatenation(aTopConfigDir + aProfileName), aVersion);
+#if defined UNX && ! defined MACOSX
+            //try preXDG path if the new one does not exist
+            if ( aInfo.userdata.isEmpty())
+                setInstallInfoIfExist(aInfo, OUStringConcatenation(aPreXDGTopConfigDir + aProfileName), aVersion);
+#endif
+        }
+    }
+
+    return aInfo;
+}
+
+sal_Int32 MigrationImpl::findPreferredMigrationProcess(const migrations_available& rAvailableMigrations)
+{
+    sal_Int32    nIndex( -1 );
+    sal_Int32    i( 0 );
+
+    for (auto const& availableMigration : rAvailableMigrations)
+    {
+        install_info aInstallInfo = findInstallation(availableMigration.supported_versions);
+        if (!aInstallInfo.productname.isEmpty() ) {
+            m_aInfo = aInstallInfo;
+            nIndex  = i;
+            break;
+        }
+        ++i;
+    }
+
+    SAL_INFO( "desktop.migration", " preferred migration is from product '" << m_aInfo.productname << "'");
+    SAL_INFO( "desktop.migration", " and settings directory '" << m_aInfo.userdata << "'");
+
+    return nIndex;
+}
+
+strings_vr MigrationImpl::applyPatterns(const strings_v& vSet, const strings_v& vPatterns)
+{
+    using namespace utl;
+    strings_vr vrResult(new strings_v);
+    for (auto const& pattern : vPatterns)
+    {
+        // find matches for this pattern in input set
+        // and copy them to the result
+        SearchParam param(pattern, SearchParam::SearchType::Regexp);
+        TextSearch ts(param, LANGUAGE_DONTKNOW);
+        sal_Int32 start = 0;
+        sal_Int32 end = 0;
+        for (auto const& elem : vSet)
+        {
+            end = elem.getLength();
+            if (ts.SearchForward(elem, &start, &end))
+                vrResult->push_back(elem);
+        }
+    }
+    return vrResult;
+}
+
+strings_vr MigrationImpl::getAllFiles(const OUString& baseURL) const
+{
+    strings_vr vrResult(new strings_v);
+
+    // get sub dirs
+    Directory dir(baseURL);
+    if (dir.open() == FileBase::E_None) {
+        strings_v vSubDirs;
+        strings_vr vrSubResult;
+
+        // work through directory contents...
+        DirectoryItem item;
+        FileStatus fs(osl_FileStatus_Mask_Type | osl_FileStatus_Mask_FileURL);
+        while (dir.getNextItem(item) == FileBase::E_None) {
+            if (item.getFileStatus(fs) == FileBase::E_None) {
+                if (fs.getFileType() == FileStatus::Directory)
+                    vSubDirs.push_back(fs.getFileURL());
+                else
+                    vrResult->push_back(fs.getFileURL());
+            }
+        }
+
+        // recurse subfolders
+        for (auto const& subDir : vSubDirs)
+        {
+            vrSubResult = getAllFiles(subDir);
+            vrResult->insert(vrResult->end(), vrSubResult->begin(), vrSubResult->end());
+        }
+    }
+    return vrResult;
+}
+
+namespace
+{
+
+// removes elements of vector 2 in vector 1
+strings_v subtract(strings_v && a, strings_v && b)
+{
+    std::sort(a.begin(), a.end());
+    strings_v::iterator ae(std::unique(a.begin(), a.end()));
+    std::sort(b.begin(), b.end());
+    strings_v::iterator be(std::unique(b.begin(), b.end()));
+    strings_v c;
+    std::set_difference(a.begin(), ae, b.begin(), be, std::back_inserter(c));
+    return c;
+}
+
+}
+
+strings_vr MigrationImpl::compileFileList()
+{
+
+    strings_vr vrResult(new strings_v);
+
+    // get a list of all files:
+    strings_vr vrFiles = getAllFiles(m_aInfo.userdata);
+
+    // get a file list result for each migration step
+    for (auto const& rMigration : *m_vrMigrations)
+    {
+        strings_vr vrInclude = applyPatterns(*vrFiles, rMigration.includeFiles);
+        strings_vr vrExclude = applyPatterns(*vrFiles, rMigration.excludeFiles);
+        strings_v sub(subtract(std::move(*vrInclude), std::move(*vrExclude)));
+        vrResult->insert(vrResult->end(), sub.begin(), sub.end());
+    }
+    return vrResult;
+}
+
+namespace
+{
+
+struct componentParts {
+    std::set< OUString > includedPaths;
+    std::set< OUString > excludedPaths;
+};
+
+typedef std::map< OUString, componentParts > Components;
+
+bool getComponent(OUString const & path, OUString * component)
+{
+    OSL_ASSERT(component != nullptr);
+    if (path.isEmpty() || path[0] != '/') {
+        SAL_INFO( "desktop.migration", "configuration migration in/exclude path " << path << " ignored (does not start with slash)" );
+        return false;
+    }
+    sal_Int32 i = path.indexOf('/', 1);
+    *component = i < 0 ? path.copy(1) : path.copy(1, i - 1);
+    return true;
+}
+
+}
+
+void MigrationImpl::copyConfig()
+{
+    Components comps;
+    for (auto const& rMigrationStep : *m_vrMigrations) {
+        for (const OUString& rIncludePath : rMigrationStep.includeConfig) {
+            OUString comp;
+            if (getComponent(rIncludePath, &comp)) {
+                comps[comp].includedPaths.insert(rIncludePath);
+            }
+        }
+        for (const OUString& rExcludePath : rMigrationStep.excludeConfig) {
+            OUString comp;
+            if (getComponent(rExcludePath, &comp)) {
+                comps[comp].excludedPaths.insert(rExcludePath);
+            }
+        }
+    }
+
+    // check if the shared registrymodifications.xcu file exists
+    bool bRegistryModificationsXcuExists = false;
+    OUString regFilePath = m_aInfo.userdata + "/user/registrymodifications.xcu";
+    File regFile(regFilePath);
+    ::osl::FileBase::RC nError = regFile.open(osl_File_OpenFlag_Read);
+    if ( nError == ::osl::FileBase::E_None ) {
+        bRegistryModificationsXcuExists = true;
+        regFile.close();
+    }
+
+    for (auto const& comp : comps)
+    {
+        if (!comp.second.includedPaths.empty()) {
+            if (!bRegistryModificationsXcuExists) {
+                // shared registrymodifications.xcu does not exists
+                // the configuration is split in many registry files
+                // determine the file names from the first element in included paths
+                OUStringBuffer buf(m_aInfo.userdata);
+                buf.append("/user/registry/data");
+                sal_Int32 n = 0;
+                do {
+                    OUString seg(comp.first.getToken(0, '.', n));
+                    OUString enc(
+                        rtl::Uri::encode(
+                            seg, rtl_UriCharClassPchar, rtl_UriEncodeStrict,
+                            RTL_TEXTENCODING_UTF8));
+                    if (enc.isEmpty() && !seg.isEmpty()) {
+                        SAL_INFO( "desktop.migration", "configuration migration component " << comp.first << " ignored (cannot be encoded as file path)" );
+                        goto next;
+                    }
+                    buf.append('/');
+                    buf.append(enc);
+                } while (n >= 0);
+                buf.append(".xcu");
+                regFilePath = buf.makeStringAndClear();
+            }
+            configuration::Update::get(
+                comphelper::getProcessComponentContext())->
+            insertModificationXcuFile(
+                regFilePath,
+                comphelper::containerToSequence(comp.second.includedPaths),
+                comphelper::containerToSequence(comp.second.excludedPaths));
+        } else {
+            SAL_INFO( "desktop.migration", "configuration migration component " << comp.first << " ignored (only excludes, no includes)" );
+        }
+next:
+        ;
+    }
+}
+
+uno::Reference< XNameAccess > MigrationImpl::getConfigAccess(const char* pPath, bool bUpdate)
+{
+    uno::Reference< XNameAccess > xNameAccess;
+    try {
+        OUString sAccessSrvc;
+        if (bUpdate)
+            sAccessSrvc = "com.sun.star.configuration.ConfigurationUpdateAccess";
+        else
+            sAccessSrvc = "com.sun.star.configuration.ConfigurationAccess";
+
+        OUString sConfigURL = OUString::createFromAscii(pPath);
+
+        uno::Reference< XMultiServiceFactory > theConfigProvider(
+            configuration::theDefaultProvider::get(
+                comphelper::getProcessComponentContext()));
+
+        // access the provider
+        uno::Sequence< uno::Any > theArgs {uno::Any(sConfigURL)};
+        xNameAccess.set(
+            theConfigProvider->createInstanceWithArguments(
+                sAccessSrvc, theArgs ), uno::UNO_QUERY_THROW );
+    } catch (const css::uno::Exception&) {
+        TOOLS_WARN_EXCEPTION("desktop.migration", "ignoring");
+    }
+    return xNameAccess;
+}
+
+void MigrationImpl::copyFiles()
+{
+    OUString localName;
+    OUString destName;
+    OUString userInstall;
+    utl::Bootstrap::PathStatus aStatus;
+    aStatus = utl::Bootstrap::locateUserInstallation(userInstall);
+    if (aStatus == utl::Bootstrap::PATH_EXISTS) {
+        for (auto const& rFile : *m_vrFileList)
+        {
+            // remove installation prefix from file
+            localName = rFile.copy(m_aInfo.userdata.getLength());
+            if (localName.endsWith( "/autocorr/acor_.dat")) {
+                // Previous versions used an empty language tag for
+                // LANGUAGE_DONTKNOW with the "[All]" autocorrection entry.
+                // As of LibreOffice 4.0 it is 'und' for LANGUAGE_UNDETERMINED
+                // so the file name is "acor_und.dat".
+                localName = OUString::Concat(localName.subView( 0, localName.getLength() - 4)) + "und.dat";
+            }
+            destName = userInstall + localName;
+            INetURLObject aURL(destName);
+            // check whether destination directory exists
+            aURL.removeSegment();
+            _checkAndCreateDirectory(aURL);
+            FileBase::RC copyResult = File::copy(rFile, destName);
+            if (copyResult != FileBase::E_None) {
+                SAL_WARN( "desktop", "Cannot copy " << rFile <<  " to " << destName);
+            }
+        }
+    } else {
+        OSL_FAIL("copyFiles: UserInstall does not exist");
+    }
+}
+
+void MigrationImpl::runServices()
+{
+    // Build argument array
+    uno::Sequence< uno::Any > seqArguments(3);
+    auto pseqArguments = seqArguments.getArray();
+    pseqArguments[0] <<= NamedValue("Productname",
+                                   uno::Any(m_aInfo.productname));
+    pseqArguments[1] <<= NamedValue("UserData",
+                                   uno::Any(m_aInfo.userdata));
+
+
+    // create an instance of every migration service
+    // and execute the migration job
+    uno::Reference< XJob > xMigrationJob;
+
+    uno::Reference< uno::XComponentContext > xContext(comphelper::getProcessComponentContext());
+    for (auto const& rMigration : *m_vrMigrations)
+    {
+        if( !rMigration.service.isEmpty()) {
+
+            try {
+                // set black list for extension migration
+                uno::Sequence< OUString > seqExtDenyList;
+                sal_uInt32 nSize = rMigration.excludeExtensions.size();
+                if ( nSize > 0 )
+                    seqExtDenyList = comphelper::arrayToSequence< OUString >(
+                                          rMigration.excludeExtensions.data(), nSize );
+                pseqArguments[2] <<= NamedValue("ExtensionDenyList",
+                                               uno::Any( seqExtDenyList ));
+
+                xMigrationJob.set(
+                    xContext->getServiceManager()->createInstanceWithArgumentsAndContext(rMigration.service, seqArguments, xContext),
+                    uno::UNO_QUERY_THROW);
+
+                xMigrationJob->execute(uno::Sequence< NamedValue >());
+
+
+            } catch (const Exception&) {
+                TOOLS_WARN_EXCEPTION( "desktop", "Execution of migration service failed. Service: "
+                            << rMigration.service);
+            } catch (...) {
+                SAL_WARN( "desktop", "Execution of migration service failed (Exception caught).\nService: "
+                            << rMigration.service << "\nNo message available");
+            }
+
+        }
+    }
+}
+
+std::vector< MigrationModuleInfo > MigrationImpl::detectUIChangesForAllModules() const
+{
+    std::vector< MigrationModuleInfo > vModulesInfo;
+    static const OUStringLiteral MENUBAR(u"menubar");
+    static const OUStringLiteral TOOLBAR(u"toolbar");
+
+    uno::Sequence< uno::Any > lArgs {uno::Any(m_aInfo.userdata + "/user/config/soffice.cfg/modules"),
+                                     uno::Any(embed::ElementModes::READ)};
+
+    uno::Reference< lang::XSingleServiceFactory > xStorageFactory(
+        embed::FileSystemStorageFactory::create(comphelper::getProcessComponentContext()));
+    uno::Reference< embed::XStorage >             xModules;
+
+    xModules.set(xStorageFactory->createInstanceWithArguments(lArgs), uno::UNO_QUERY);
+    if (!xModules.is())
+        return vModulesInfo;
+
+    uno::Sequence< OUString > lNames = xModules->getElementNames();
+    sal_Int32 nLength = lNames.getLength();
+    for (sal_Int32 i=0; i<nLength; ++i) {
+        OUString sModuleShortName = lNames[i];
+        uno::Reference< embed::XStorage > xModule = xModules->openStorageElement(sModuleShortName, embed::ElementModes::READ);
+        if (xModule.is()) {
+            MigrationModuleInfo aModuleInfo;
+
+            uno::Reference< embed::XStorage > xMenubar = xModule->openStorageElement(MENUBAR, embed::ElementModes::READ);
+            if (xMenubar.is()) {
+                if (xMenubar->getElementNames().hasElements()) {
+                    aModuleInfo.sModuleShortName = sModuleShortName;
+                    aModuleInfo.bHasMenubar = true;
+                }
+            }
+
+            uno::Reference< embed::XStorage > xToolbar = xModule->openStorageElement(TOOLBAR, embed::ElementModes::READ);
+            if (xToolbar.is()) {
+                const ::uno::Sequence< OUString > lToolbars = xToolbar->getElementNames();
+                for (OUString const & sToolbarName : lToolbars) {
+                    if (sToolbarName.startsWith("custom_"))
+                        continue;
+
+                    aModuleInfo.sModuleShortName = sModuleShortName;
+                    sal_Int32 nIndex = sToolbarName.lastIndexOf('.');
+                    if (nIndex > 0) {
+                        std::u16string_view sExtension(sToolbarName.subView(nIndex));
+                        OUString sToolbarResourceName(sToolbarName.copy(0, nIndex));
+                        if (!sToolbarResourceName.isEmpty() && sExtension == u".xml")
+                            aModuleInfo.m_vToolbars.push_back(sToolbarResourceName);
+                    }
+                }
+            }
+
+            if (!aModuleInfo.sModuleShortName.isEmpty())
+                vModulesInfo.push_back(aModuleInfo);
+        }
+    }
+
+    return vModulesInfo;
+}
+
+void MigrationImpl::compareOldAndNewConfig(const OUString& sParent,
+        const uno::Reference< container::XIndexContainer >& xIndexOld,
+        const uno::Reference< container::XIndexContainer >& xIndexNew,
+        const OUString& sResourceURL)
+{
+    static const OUStringLiteral MENU_SEPARATOR(u" | ");
+
+    std::vector< MigrationItem > vOldItems;
+    std::vector< MigrationItem > vNewItems;
+    uno::Sequence< beans::PropertyValue > aProps;
+    sal_Int32 nOldCount = xIndexOld->getCount();
+    sal_Int32 nNewCount = xIndexNew->getCount();
+
+    for (int n=0; n<nOldCount; ++n) {
+        MigrationItem aMigrationItem;
+        if (xIndexOld->getByIndex(n) >>= aProps) {
+            for(beans::PropertyValue const & prop : std::as_const(aProps)) {
+                if ( prop.Name == ITEM_DESCRIPTOR_COMMANDURL )
+                    prop.Value >>= aMigrationItem.m_sCommandURL;
+                else if ( prop.Name == ITEM_DESCRIPTOR_CONTAINER )
+                    prop.Value >>= aMigrationItem.m_xPopupMenu;
+            }
+
+            if (!aMigrationItem.m_sCommandURL.isEmpty())
+                vOldItems.push_back(aMigrationItem);
+        }
+    }
+
+    for (int n=0; n<nNewCount; ++n) {
+        MigrationItem aMigrationItem;
+        if (xIndexNew->getByIndex(n) >>= aProps) {
+            for(beans::PropertyValue const & prop : std::as_const(aProps)) {
+                if ( prop.Name == ITEM_DESCRIPTOR_COMMANDURL )
+                    prop.Value >>= aMigrationItem.m_sCommandURL;
+                else if ( prop.Name == ITEM_DESCRIPTOR_CONTAINER )
+                    prop.Value >>= aMigrationItem.m_xPopupMenu;
+            }
+
+            if (!aMigrationItem.m_sCommandURL.isEmpty())
+                vNewItems.push_back(aMigrationItem);
+        }
+    }
+
+    OUString sSibling;
+    for (auto const& oldItem : vOldItems)
+    {
+        std::vector< MigrationItem >::iterator pFound = std::find(vNewItems.begin(), vNewItems.end(), oldItem);
+        if (pFound != vNewItems.end() && oldItem.m_xPopupMenu.is()) {
+            OUString sName;
+            if (!sParent.isEmpty())
+                sName = sParent + MENU_SEPARATOR + oldItem.m_sCommandURL;
+            else
+                sName = oldItem.m_sCommandURL;
+            compareOldAndNewConfig(sName, oldItem.m_xPopupMenu, pFound->m_xPopupMenu, sResourceURL);
+        } else if (pFound == vNewItems.end()) {
+            MigrationItem aMigrationItem(sParent, sSibling, oldItem.m_sCommandURL, oldItem.m_xPopupMenu);
+            if (m_aOldVersionItemsHashMap.find(sResourceURL)==m_aOldVersionItemsHashMap.end()) {
+                std::vector< MigrationItem > vMigrationItems;
+                m_aOldVersionItemsHashMap.emplace(sResourceURL, vMigrationItems);
+                m_aOldVersionItemsHashMap[sResourceURL].push_back(aMigrationItem);
+            } else {
+                if (std::find(m_aOldVersionItemsHashMap[sResourceURL].begin(), m_aOldVersionItemsHashMap[sResourceURL].end(), aMigrationItem)==m_aOldVersionItemsHashMap[sResourceURL].end())
+                    m_aOldVersionItemsHashMap[sResourceURL].push_back(aMigrationItem);
+            }
+        }
+
+        sSibling = oldItem.m_sCommandURL;
+    }
+}
+
+void MigrationImpl::mergeOldToNewVersion(const uno::Reference< ui::XUIConfigurationManager >& xCfgManager,
+        const uno::Reference< container::XIndexContainer>& xIndexContainer,
+        const OUString& sModuleIdentifier,
+        const OUString& sResourceURL)
+{
+    MigrationHashMap::iterator pFound = m_aOldVersionItemsHashMap.find(sResourceURL);
+    if (pFound==m_aOldVersionItemsHashMap.end())
+        return;
+
+    for (auto const& elem : pFound->second)
+    {
+        uno::Reference< container::XIndexContainer > xTemp = xIndexContainer;
+
+        OUString sParentNodeName = elem.m_sParentNodeName;
+        sal_Int32 nIndex = 0;
+        do {
+            std::u16string_view sToken( o3tl::trim(o3tl::getToken(sParentNodeName, 0, '|', nIndex)) );
+            if (sToken.empty())
+                break;
+
+            sal_Int32 nCount = xTemp->getCount();
+            for (sal_Int32 i=0; i<nCount; ++i) {
+                OUString sCommandURL;
+                OUString sLabel;
+                uno::Reference< container::XIndexContainer > xChild;
+
+                uno::Sequence< beans::PropertyValue > aPropSeq;
+                xTemp->getByIndex(i) >>= aPropSeq;
+                for (beans::PropertyValue const & prop : std::as_const(aPropSeq)) {
+                    OUString sPropName = prop.Name;
+                    if ( sPropName == ITEM_DESCRIPTOR_COMMANDURL )
+                        prop.Value >>= sCommandURL;
+                    else if ( sPropName == ITEM_DESCRIPTOR_LABEL )
+                        prop.Value >>= sLabel;
+                    else if ( sPropName == ITEM_DESCRIPTOR_CONTAINER )
+                        prop.Value >>= xChild;
+                }
+
+                if (sCommandURL == sToken) {
+                    xTemp = xChild;
+                    break;
+                }
+            }
+
+        } while (nIndex >= 0);
+
+        if (nIndex == -1) {
+            auto aProperties = vcl::CommandInfoProvider::GetCommandProperties(elem.m_sCommandURL, sModuleIdentifier);
+            uno::Sequence< beans::PropertyValue > aPropSeq {
+                beans::PropertyValue(ITEM_DESCRIPTOR_COMMANDURL, 0, uno::Any(elem.m_sCommandURL), beans::PropertyState_DIRECT_VALUE),
+                beans::PropertyValue(ITEM_DESCRIPTOR_LABEL, 0, uno::Any(vcl::CommandInfoProvider::GetLabelForCommand(aProperties)), beans::PropertyState_DIRECT_VALUE),
+                beans::PropertyValue(ITEM_DESCRIPTOR_CONTAINER, 0, uno::Any(elem.m_xPopupMenu), beans::PropertyState_DIRECT_VALUE)
+            };
+
+            if (elem.m_sPrevSibling.isEmpty())
+                xTemp->insertByIndex(0, uno::Any(aPropSeq));
+            else {
+                sal_Int32 nCount = xTemp->getCount();
+                sal_Int32 i = 0;
+                for (; i<nCount; ++i) {
+                    OUString sCmd;
+                    uno::Sequence< beans::PropertyValue > aTempPropSeq;
+                    xTemp->getByIndex(i) >>= aTempPropSeq;
+                    for (beans::PropertyValue const & prop : std::as_const(aTempPropSeq)) {
+                        if ( prop.Name == ITEM_DESCRIPTOR_COMMANDURL ) {
+                            prop.Value >>= sCmd;
+                            break;
+                        }
+                    }
+
+                    if (sCmd == elem.m_sPrevSibling)
+                        break;
+                }
+
+                xTemp->insertByIndex(i+1, uno::Any(aPropSeq));
+            }
+        }
+    }
+
+    if (xIndexContainer.is())
+        xCfgManager->replaceSettings(sResourceURL, xIndexContainer);
+
+    uno::Reference< ui::XUIConfigurationPersistence > xUIConfigurationPersistence(xCfgManager, uno::UNO_QUERY);
+    if (xUIConfigurationPersistence.is())
+        xUIConfigurationPersistence->store();
+}
+
+uno::Reference< ui::XUIConfigurationManager > NewVersionUIInfo::getConfigManager(std::u16string_view sModuleShortName) const
+{
+    uno::Reference< ui::XUIConfigurationManager > xCfgManager;
+
+    for ( const css::beans::PropertyValue& rProp : m_lCfgManagerSeq) {
+        if (rProp.Name == sModuleShortName) {
+            rProp.Value >>= xCfgManager;
+            break;
+        }
+    }
+
+    return xCfgManager;
+}
+
+uno::Reference< container::XIndexContainer > NewVersionUIInfo::getNewMenubarSettings(std::u16string_view sModuleShortName) const
+{
+    uno::Reference< container::XIndexContainer > xNewMenuSettings;
+
+    for (auto const & prop : m_lNewVersionMenubarSettingsSeq) {
+        if (prop.Name == sModuleShortName) {
+            prop.Value >>= xNewMenuSettings;
+            break;
+        }
+    }
+
+    return xNewMenuSettings;
+}
+
+uno::Reference< container::XIndexContainer > NewVersionUIInfo::getNewToolbarSettings(std::u16string_view sModuleShortName, std::u16string_view sToolbarName) const
+{
+    uno::Reference< container::XIndexContainer > xNewToolbarSettings;
+
+    for (auto const & newProp : m_lNewVersionToolbarSettingsSeq) {
+        if (newProp.Name == sModuleShortName) {
+            uno::Sequence< beans::PropertyValue > lToolbarSettingsSeq;
+            newProp.Value >>= lToolbarSettingsSeq;
+            for (auto const & prop : std::as_const(lToolbarSettingsSeq)) {
+                if (prop.Name == sToolbarName) {
+                    prop.Value >>= xNewToolbarSettings;
+                    break;
+                }
+            }
+
+            break;
+        }
+    }
+
+    return xNewToolbarSettings;
+}
+
+void NewVersionUIInfo::init(const std::vector< MigrationModuleInfo >& vModulesInfo)
+{
+    m_lCfgManagerSeq.resize(vModulesInfo.size());
+    m_lNewVersionMenubarSettingsSeq.realloc(vModulesInfo.size());
+    auto p_lNewVersionMenubarSettingsSeq = m_lNewVersionMenubarSettingsSeq.getArray();
+    m_lNewVersionToolbarSettingsSeq.realloc(vModulesInfo.size());
+    auto p_lNewVersionToolbarSettingsSeq = m_lNewVersionToolbarSettingsSeq.getArray();
+
+    static const OUStringLiteral sMenubarResourceURL(u"private:resource/menubar/menubar");
+    static const OUStringLiteral sToolbarResourcePre(u"private:resource/toolbar/");
+
+    uno::Reference< ui::XModuleUIConfigurationManagerSupplier > xModuleCfgSupplier = ui::theModuleUIConfigurationManagerSupplier::get( ::comphelper::getProcessComponentContext() );
+
+    for (size_t i=0; i<vModulesInfo.size(); ++i) {
+        OUString sModuleIdentifier = mapModuleShortNameToIdentifier(vModulesInfo[i].sModuleShortName);
+        if (!sModuleIdentifier.isEmpty()) {
+            uno::Reference< ui::XUIConfigurationManager > xCfgManager = xModuleCfgSupplier->getUIConfigurationManager(sModuleIdentifier);
+            m_lCfgManagerSeq[i].Name = vModulesInfo[i].sModuleShortName;
+            m_lCfgManagerSeq[i].Value <<= xCfgManager;
+
+            if (vModulesInfo[i].bHasMenubar) {
+                p_lNewVersionMenubarSettingsSeq[i].Name = vModulesInfo[i].sModuleShortName;
+                p_lNewVersionMenubarSettingsSeq[i].Value <<= xCfgManager->getSettings(sMenubarResourceURL, true);
+            }
+
+            sal_Int32 nToolbars = vModulesInfo[i].m_vToolbars.size();
+            if (nToolbars > 0) {
+                uno::Sequence< beans::PropertyValue > lPropSeq(nToolbars);
+                auto plPropSeq = lPropSeq.getArray();
+                for (sal_Int32 j=0; j<nToolbars; ++j) {
+                    OUString sToolbarName = vModulesInfo[i].m_vToolbars[j];
+                    OUString sToolbarResourceURL = sToolbarResourcePre + sToolbarName;
+
+                    plPropSeq[j].Name = sToolbarName;
+                    plPropSeq[j].Value <<= xCfgManager->getSettings(sToolbarResourceURL, true);
+                }
+
+                p_lNewVersionToolbarSettingsSeq[i].Name = vModulesInfo[i].sModuleShortName;
+                p_lNewVersionToolbarSettingsSeq[i].Value <<= lPropSeq;
+            }
+        }
+    }
+}
+
+} // namespace desktop
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/migration/migration_impl.hxx b/desktop/source/migration/migration_impl.hxx
new file mode 100644
index 000000000..6b0923d29
--- /dev/null
+++ b/desktop/source/migration/migration_impl.hxx
@@ -0,0 +1,198 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#pragma once
+
+#include <memory>
+#include <string_view>
+#include <unordered_map>
+#include <utility>
+#include <vector>
+
+#include <o3tl/string_view.hxx>
+#include <sal/types.h>
+#include <rtl/ustring.hxx>
+
+#include <com/sun/star/uno/Reference.hxx>
+
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/container/XIndexContainer.hpp>
+#include <com/sun/star/ui/XUIConfigurationManager.hpp>
+
+namespace desktop
+{
+
+struct install_info
+{
+    OUString productname;  // human readable product name
+    OUString userdata;     // file: url for user installation
+};
+
+typedef std::vector< OUString > strings_v;
+typedef std::unique_ptr< strings_v > strings_vr;
+
+struct migration_step
+{
+    strings_v includeFiles;
+    strings_v excludeFiles;
+    strings_v includeConfig;
+    strings_v excludeConfig;
+    strings_v excludeExtensions;
+    OUString service;
+};
+
+struct supported_migration
+{
+    OUString name;
+    sal_Int32     nPriority;
+    strings_v     supported_versions;
+};
+
+typedef std::vector< migration_step > migrations_v;
+typedef std::unique_ptr< migrations_v > migrations_vr;
+typedef std::vector< supported_migration > migrations_available;
+
+inline bool areBothOpenFrom(std::u16string_view cmd1, std::u16string_view cmd2)
+{
+    return cmd1 == u".uno:Open" && o3tl::starts_with(cmd2, u".uno:OpenFrom");
+}
+
+/**
+    define the item, e.g.:menuitem, toolbaritem, to be migrated. we keep the information
+    of the command URL, the previous sibling node and the parent node of an item
+*/
+struct MigrationItem
+{
+    OUString m_sParentNodeName;
+    OUString m_sPrevSibling;
+    OUString m_sCommandURL;
+    css::uno::Reference< css::container::XIndexContainer > m_xPopupMenu;
+
+    MigrationItem()
+    {
+    }
+
+    MigrationItem(OUString sParentNodeName,
+        OUString sPrevSibling,
+        OUString sCommandURL,
+        css::uno::Reference< css::container::XIndexContainer > xPopupMenu)
+          : m_sParentNodeName(std::move(sParentNodeName)), m_sPrevSibling(std::move(sPrevSibling)),
+            m_sCommandURL(std::move(sCommandURL)), m_xPopupMenu(std::move(xPopupMenu))
+    {
+    }
+
+    bool operator==(const MigrationItem& aMigrationItem) const
+    {
+        return
+            (aMigrationItem.m_sCommandURL == m_sCommandURL
+             || areBothOpenFrom(aMigrationItem.m_sCommandURL, m_sCommandURL)
+             || areBothOpenFrom(m_sCommandURL, aMigrationItem.m_sCommandURL))
+            && aMigrationItem.m_sParentNodeName == m_sParentNodeName
+            && aMigrationItem.m_sPrevSibling    == m_sPrevSibling
+            && aMigrationItem.m_xPopupMenu.is() == m_xPopupMenu.is();
+    }
+};
+
+typedef std::unordered_map< OUString, std::vector< MigrationItem > > MigrationHashMap;
+
+/**
+    information for the UI elements to be migrated for one module
+*/
+struct MigrationModuleInfo
+{
+    OUString sModuleShortName;
+    bool     bHasMenubar;
+    std::vector< OUString > m_vToolbars;
+
+    MigrationModuleInfo() : bHasMenubar(false) {};
+};
+
+
+/**
+    get the information before copying the ui configuration files of old version to new version
+*/
+class NewVersionUIInfo
+{
+public:
+
+    css::uno::Reference< css::ui::XUIConfigurationManager > getConfigManager(std::u16string_view sModuleShortName) const;
+    css::uno::Reference< css::container::XIndexContainer > getNewMenubarSettings(std::u16string_view sModuleShortName) const;
+    css::uno::Reference< css::container::XIndexContainer > getNewToolbarSettings(std::u16string_view sModuleShortName, std::u16string_view sToolbarName) const;
+    void init(const std::vector< MigrationModuleInfo >& vModulesInfo);
+
+private:
+
+    std::vector< css::beans::PropertyValue > m_lCfgManagerSeq;
+    css::uno::Sequence< css::beans::PropertyValue > m_lNewVersionMenubarSettingsSeq;
+    css::uno::Sequence< css::beans::PropertyValue > m_lNewVersionToolbarSettingsSeq;
+};
+
+class MigrationImpl
+{
+
+private:
+    migrations_available m_vMigrationsAvailable; // list of all available migrations
+    migrations_vr        m_vrMigrations;         // list of all migration specs from config
+    install_info         m_aInfo;                // info about the version being migrated
+    strings_vr           m_vrFileList;           // final list of files to be copied
+     MigrationHashMap     m_aOldVersionItemsHashMap;
+
+    // functions to control the migration process
+    static void   readAvailableMigrations(migrations_available&);
+    bool          alreadyMigrated();
+    static migrations_vr readMigrationSteps(const OUString& rMigrationName);
+    sal_Int32     findPreferredMigrationProcess(const migrations_available&);
+#if defined UNX && ! defined MACOSX
+    static OUString preXDGConfigDir(const OUString& rConfigDir);
+#endif
+    static void   setInstallInfoIfExist(install_info& aInfo, std::u16string_view rConfigDir, const OUString& rVersion);
+    static install_info  findInstallation(const strings_v& rVersions);
+    strings_vr    compileFileList();
+
+    // helpers
+    strings_vr getAllFiles(const OUString& baseURL) const;
+    static strings_vr applyPatterns(const strings_v& vSet, const strings_v& vPatterns);
+    static css::uno::Reference< css::container::XNameAccess > getConfigAccess(const char* path, bool rw=false);
+
+    std::vector< MigrationModuleInfo > detectUIChangesForAllModules() const;
+    void compareOldAndNewConfig(const OUString& sParentNodeName,
+        const css::uno::Reference< css::container::XIndexContainer >& xOldIndexContainer,
+        const css::uno::Reference< css::container::XIndexContainer >& xNewIndexContainer,
+        const OUString& sToolbarName);
+    void mergeOldToNewVersion(const css::uno::Reference< css::ui::XUIConfigurationManager >& xCfgManager,
+        const css::uno::Reference< css::container::XIndexContainer>& xIndexContainer,
+        const OUString& sModuleIdentifier,
+        const OUString& sResourceURL);
+
+    // actual processing function that perform the migration steps
+    void copyFiles();
+    void copyConfig();
+    void runServices();
+
+    static void setMigrationCompleted();
+    static bool checkMigrationCompleted();
+
+public:
+    MigrationImpl();
+    ~MigrationImpl();
+    bool initializeMigration();
+    bool doMigration();
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/migration/services/basicmigration.cxx b/desktop/source/migration/services/basicmigration.cxx
new file mode 100644
index 000000000..94e8677de
--- /dev/null
+++ b/desktop/source/migration/services/basicmigration.cxx
@@ -0,0 +1,202 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "basicmigration.hxx"
+#include <cppuhelper/supportsservice.hxx>
+#include <tools/urlobj.hxx>
+#include <unotools/bootstrap.hxx>
+#include <sal/log.hxx>
+#include <osl/file.hxx>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+
+namespace migration
+{
+
+
+    #define sSourceUserBasic "/user/basic"
+    #define sTargetUserBasic "/user/__basic_80"
+
+
+    // BasicMigration
+
+
+    BasicMigration::BasicMigration()
+    {
+    }
+
+
+    BasicMigration::~BasicMigration()
+    {
+    }
+
+
+    TStringVectorPtr BasicMigration::getFiles( const OUString& rBaseURL ) const
+    {
+        TStringVectorPtr aResult( new TStringVector );
+        ::osl::Directory aDir( rBaseURL);
+
+        if ( aDir.open() == ::osl::FileBase::E_None )
+        {
+            // iterate over directory content
+            TStringVector aSubDirs;
+            ::osl::DirectoryItem aItem;
+            while ( aDir.getNextItem( aItem ) == ::osl::FileBase::E_None )
+            {
+                ::osl::FileStatus aFileStatus( osl_FileStatus_Mask_Type | osl_FileStatus_Mask_FileURL );
+                if ( aItem.getFileStatus( aFileStatus ) == ::osl::FileBase::E_None )
+                {
+                    if ( aFileStatus.getFileType() == ::osl::FileStatus::Directory )
+                        aSubDirs.push_back( aFileStatus.getFileURL() );
+                    else
+                        aResult->push_back( aFileStatus.getFileURL() );
+                }
+            }
+
+            // iterate recursive over subfolders
+            for (auto const& subDir : aSubDirs)
+            {
+                TStringVectorPtr aSubResult = getFiles(subDir);
+                aResult->insert( aResult->end(), aSubResult->begin(), aSubResult->end() );
+            }
+        }
+
+        return aResult;
+    }
+
+
+    void BasicMigration::checkAndCreateDirectory( INetURLObject const & rDirURL )
+    {
+        ::osl::FileBase::RC aResult = ::osl::Directory::create( rDirURL.GetMainURL( INetURLObject::DecodeMechanism::ToIUri ) );
+        if ( aResult == ::osl::FileBase::E_NOENT )
+        {
+            INetURLObject aBaseURL( rDirURL );
+            aBaseURL.removeSegment();
+            checkAndCreateDirectory( aBaseURL );
+            ::osl::Directory::create( rDirURL.GetMainURL( INetURLObject::DecodeMechanism::ToIUri ) );
+        }
+    }
+
+
+    void BasicMigration::copyFiles()
+    {
+        OUString sTargetDir;
+        ::utl::Bootstrap::PathStatus aStatus = ::utl::Bootstrap::locateUserInstallation( sTargetDir );
+        if ( aStatus == ::utl::Bootstrap::PATH_EXISTS )
+        {
+            sTargetDir += sTargetUserBasic;
+            TStringVectorPtr aFileList = getFiles( m_sSourceDir );
+            for (auto const& elem : *aFileList)
+            {
+                std::u16string_view sLocalName = elem.subView( m_sSourceDir.getLength() );
+                OUString sTargetName = sTargetDir + sLocalName;
+                INetURLObject aURL( sTargetName );
+                aURL.removeSegment();
+                checkAndCreateDirectory( aURL );
+                ::osl::FileBase::RC aResult = ::osl::File::copy( elem, sTargetName );
+                if ( aResult != ::osl::FileBase::E_None )
+                {
+                    SAL_WARN( "desktop", "BasicMigration::copyFiles: cannot copy "
+                                << elem << " to " << sTargetName );
+                }
+            }
+        }
+        else
+        {
+            OSL_FAIL( "BasicMigration::copyFiles: no user installation!" );
+        }
+    }
+
+
+    // XServiceInfo
+
+
+    OUString BasicMigration::getImplementationName()
+    {
+        return "com.sun.star.comp.desktop.migration.Basic";
+    }
+
+
+    sal_Bool BasicMigration::supportsService(OUString const & ServiceName)
+    {
+        return cppu::supportsService(this, ServiceName);
+    }
+
+
+    Sequence< OUString > BasicMigration::getSupportedServiceNames()
+    {
+        return { "com.sun.star.migration.Basic" };
+    }
+
+
+    // XInitialization
+
+
+    void BasicMigration::initialize( const Sequence< Any >& aArguments )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+
+        const Any* pIter = aArguments.getConstArray();
+        const Any* pEnd = pIter + aArguments.getLength();
+        for ( ; pIter != pEnd ; ++pIter )
+        {
+            beans::NamedValue aValue;
+            *pIter >>= aValue;
+            if ( aValue.Name == "UserData" )
+            {
+                if ( !(aValue.Value >>= m_sSourceDir) )
+                {
+                    OSL_FAIL( "BasicMigration::initialize: argument UserData has wrong type!" );
+                }
+                m_sSourceDir += sSourceUserBasic;
+                break;
+            }
+        }
+    }
+
+
+    // XJob
+
+
+    Any BasicMigration::execute( const Sequence< beans::NamedValue >& )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+
+        copyFiles();
+
+        return Any();
+    }
+
+
+}   // namespace migration
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_BasicMigration_get_implementation(
+    css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new migration::BasicMigration());
+}
+
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/migration/services/basicmigration.hxx b/desktop/source/migration/services/basicmigration.hxx
new file mode 100644
index 000000000..889b9245d
--- /dev/null
+++ b/desktop/source/migration/services/basicmigration.hxx
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include "misc.hxx"
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/task/XJob.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <osl/mutex.hxx>
+
+
+class INetURLObject;
+
+
+namespace migration
+{
+    typedef ::cppu::WeakImplHelper<
+        css::lang::XServiceInfo,
+        css::lang::XInitialization,
+        css::task::XJob > BasicMigration_BASE;
+
+    class BasicMigration : public BasicMigration_BASE
+    {
+    private:
+        ::osl::Mutex            m_aMutex;
+        OUString         m_sSourceDir;
+
+        TStringVectorPtr        getFiles( const OUString& rBaseURL ) const;
+        void                    checkAndCreateDirectory( INetURLObject const & rDirURL );
+        void                    copyFiles();
+
+    public:
+        BasicMigration();
+        virtual ~BasicMigration() override;
+
+        // XServiceInfo
+        virtual OUString SAL_CALL getImplementationName() override;
+        virtual sal_Bool SAL_CALL supportsService( const OUString& rServiceName ) override;
+        virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+        // XInitialization
+        virtual void SAL_CALL initialize( const css::uno::Sequence< css::uno::Any >& aArguments ) override;
+
+        // XJob
+        virtual css::uno::Any SAL_CALL execute(
+            const css::uno::Sequence< css::beans::NamedValue >& Arguments ) override;
+    };
+
+
+}   // namespace migration
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/migration/services/cppumaker.mk b/desktop/source/migration/services/cppumaker.mk
new file mode 100644
index 000000000..57e070f80
--- /dev/null
+++ b/desktop/source/migration/services/cppumaker.mk
@@ -0,0 +1,27 @@
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This file incorporates work covered by the following license notice:
+#
+#   Licensed to the Apache Software Foundation (ASF) under one or more
+#   contributor license agreements. See the NOTICE file distributed
+#   with this work for additional information regarding copyright
+#   ownership. The ASF licenses this file to you under the Apache
+#   License, Version 2.0 (the "License"); you may not use this file
+#   except in compliance with the License. You may obtain a copy of
+#   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+#
+
+.IF "$(debug)" != ""
+
+# MSVC++: no inlining
+.IF "$(COM)" == "MSC"
+CFLAGS += -Ob0
+.ENDIF
+
+.ENDIF
+
diff --git a/desktop/source/migration/services/jvmfwk.cxx b/desktop/source/migration/services/jvmfwk.cxx
new file mode 100644
index 000000000..65eff6767
--- /dev/null
+++ b/desktop/source/migration/services/jvmfwk.cxx
@@ -0,0 +1,395 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <rtl/ustring.hxx>
+#include <rtl/bootstrap.hxx>
+#include <sal/types.h>
+#include <sal/config.h>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/lang/WrappedTargetException.hpp>
+#include <com/sun/star/task/XJob.hpp>
+#include <com/sun/star/configuration/backend/XLayer.hpp>
+#include <com/sun/star/configuration/backend/XLayerHandler.hpp>
+#include <com/sun/star/configuration/backend/MalformedDataException.hpp>
+#include <com/sun/star/configuration/backend/TemplateIdentifier.hpp>
+#include <jvmfwk/framework.hxx>
+#include "jvmfwk.hxx"
+#include <memory>
+#include <stack>
+#include <stdio.h>
+
+#include <osl/diagnose.h>
+
+constexpr OUStringLiteral SERVICE_NAME = u"com.sun.star.migration.Java";
+#define IMPL_NAME "com.sun.star.comp.desktop.migration.Java"
+
+#define ENABLE_JAVA     1
+#define USER_CLASS_PATH 2
+
+using namespace com::sun::star::uno;
+using namespace com::sun::star::beans;
+using namespace com::sun::star::lang;
+using namespace com::sun::star::configuration::backend;
+
+namespace migration
+{
+
+namespace {
+
+class JavaMigration : public ::cppu::WeakImplHelper<
+    css::lang::XServiceInfo,
+    css::lang::XInitialization,
+    css::task::XJob,
+    css::configuration::backend::XLayerHandler>
+{
+public:
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString & rServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    //XInitialization
+    virtual void SAL_CALL initialize( const css::uno::Sequence< css::uno::Any >& aArguments ) override;
+
+    //XJob
+    virtual css::uno::Any SAL_CALL execute(
+        const css::uno::Sequence<css::beans::NamedValue >& Arguments ) override;
+
+        // XLayerHandler
+    virtual void SAL_CALL startLayer() override;
+
+    virtual void SAL_CALL endLayer() override;
+
+    virtual void SAL_CALL overrideNode(
+            const OUString& aName,
+            sal_Int16 aAttributes,
+            sal_Bool bClear) override;
+
+    virtual void SAL_CALL addOrReplaceNode(
+            const OUString& aName,
+            sal_Int16 aAttributes) override;
+
+    virtual void SAL_CALL  addOrReplaceNodeFromTemplate(
+            const OUString& aName,
+            const css::configuration::backend::TemplateIdentifier& aTemplate,
+            sal_Int16 aAttributes ) override;
+
+    virtual void SAL_CALL  endNode() override;
+
+    virtual void SAL_CALL  dropNode(
+            const OUString& aName ) override;
+
+    virtual void SAL_CALL  overrideProperty(
+            const OUString& aName,
+            sal_Int16 aAttributes,
+            const css::uno::Type& aType,
+            sal_Bool bClear ) override;
+
+    virtual void SAL_CALL  setPropertyValue(
+            const css::uno::Any& aValue ) override;
+
+    virtual void SAL_CALL setPropertyValueForLocale(
+            const css::uno::Any& aValue,
+            const OUString& aLocale ) override;
+
+    virtual void SAL_CALL  endProperty() override;
+
+    virtual void SAL_CALL  addProperty(
+            const OUString& aName,
+            sal_Int16 aAttributes,
+            const css::uno::Type& aType ) override;
+
+    virtual void SAL_CALL  addPropertyWithValue(
+            const OUString& aName,
+            sal_Int16 aAttributes,
+            const css::uno::Any& aValue ) override;
+
+
+    virtual ~JavaMigration() override;
+
+private:
+    OUString m_sUserDir;
+    css::uno::Reference< css::configuration::backend::XLayer> m_xLayer;
+
+    void migrateJavarc();
+    typedef std::pair< OUString,   sal_Int16>  TElementType;
+    typedef std::stack< TElementType > TElementStack;
+    TElementStack m_aStack;
+
+};
+
+}
+
+JavaMigration::~JavaMigration()
+{
+    OSL_ASSERT(m_aStack.empty());
+}
+
+OUString jvmfwk_getImplementationName()
+{
+    return IMPL_NAME;
+}
+
+css::uno::Sequence< OUString > jvmfwk_getSupportedServiceNames()
+{
+    return { SERVICE_NAME };
+}
+
+// XServiceInfo
+OUString SAL_CALL JavaMigration::getImplementationName()
+{
+    return jvmfwk_getImplementationName();
+}
+
+sal_Bool JavaMigration::supportsService(OUString const & ServiceName)
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > SAL_CALL JavaMigration::getSupportedServiceNames()
+{
+    return jvmfwk_getSupportedServiceNames();
+}
+
+//XInitialization ----------------------------------------------------------------------
+void SAL_CALL JavaMigration::initialize( const css::uno::Sequence< css::uno::Any >& aArguments )
+{
+    const css::uno::Any* pIter = aArguments.getConstArray();
+    const css::uno::Any* pEnd = pIter + aArguments.getLength();
+    css::uno::Sequence<css::beans::NamedValue> aOldConfigValues;
+    css::beans::NamedValue aValue;
+    for(;pIter != pEnd;++pIter)
+    {
+        *pIter >>= aValue;
+        if ( aValue.Name == "OldConfiguration" )
+        {
+            bool bSuccess = aValue.Value >>= aOldConfigValues;
+            OSL_ENSURE(bSuccess, "[Service implementation " IMPL_NAME
+                       "] XInitialization::initialize: Argument OldConfiguration has wrong type.");
+            if (bSuccess)
+            {
+                const css::beans::NamedValue* pIter2 = aOldConfigValues.getConstArray();
+                const css::beans::NamedValue* pEnd2 = pIter2 + aOldConfigValues.getLength();
+                for(;pIter2 != pEnd2;++pIter2)
+                {
+                    if ( pIter2->Name == "org.openoffice.Office.Java" )
+                    {
+                        pIter2->Value >>= m_xLayer;
+                        break;
+                    }
+                }
+            }
+        }
+        else if ( aValue.Name == "UserData" )
+        {
+            if ( !(aValue.Value >>= m_sUserDir) )
+            {
+                OSL_FAIL(
+                    "[Service implementation " IMPL_NAME
+                    "] XInitialization::initialize: Argument UserData has wrong type.");
+            }
+        }
+    }
+
+}
+
+//XJob
+css::uno::Any SAL_CALL JavaMigration::execute(
+        const css::uno::Sequence<css::beans::NamedValue >& )
+{
+    migrateJavarc();
+    if (m_xLayer.is())
+        m_xLayer->readData(this);
+
+    return css::uno::Any();
+}
+
+void JavaMigration::migrateJavarc()
+{
+    if (m_sUserDir.isEmpty())
+        return;
+
+    OUString sValue;
+    rtl::Bootstrap javaini(m_sUserDir + "/user/config/" SAL_CONFIGFILE("java"));
+    bool bSuccess = javaini.getFrom("Home", sValue);
+    OSL_ENSURE(bSuccess, "[Service implementation " IMPL_NAME
+                       "] XJob::execute: Could not get Home entry from java.ini/javarc.");
+    if (!bSuccess || sValue.isEmpty())
+        return;
+
+    //get the directory
+    std::unique_ptr<JavaInfo> aInfo;
+    javaFrameworkError err = jfw_getJavaInfoByPath(sValue, &aInfo);
+
+    if (err == JFW_E_NONE)
+    {
+        if (jfw_setSelectedJRE(aInfo.get()) != JFW_E_NONE)
+        {
+            OSL_FAIL("[Service implementation " IMPL_NAME
+                       "] XJob::execute: jfw_setSelectedJRE failed.");
+            fprintf(stderr, "\nCannot migrate Java. An error occurred.\n");
+        }
+    }
+    else if (err == JFW_E_FAILED_VERSION)
+    {
+        fprintf(stderr, "\nCannot migrate Java settings because the version of the Java  "
+                "is not supported anymore.\n");
+    }
+}
+
+
+// XLayerHandler
+void SAL_CALL JavaMigration::startLayer()
+{
+}
+
+
+void SAL_CALL JavaMigration::endLayer()
+{
+}
+
+
+void SAL_CALL JavaMigration::overrideNode(
+        const OUString&,
+        sal_Int16,
+        sal_Bool)
+
+{
+
+}
+
+
+void SAL_CALL JavaMigration::addOrReplaceNode(
+        const OUString&,
+        sal_Int16)
+{
+
+}
+void SAL_CALL  JavaMigration::endNode()
+{
+}
+
+
+void SAL_CALL  JavaMigration::dropNode(
+        const OUString& )
+{
+}
+
+
+void SAL_CALL  JavaMigration::overrideProperty(
+        const OUString& aName,
+        sal_Int16,
+        const Type&,
+        sal_Bool )
+{
+    if ( aName == "Enable" )
+        m_aStack.push(TElementStack::value_type(aName,ENABLE_JAVA));
+    else if ( aName == "UserClassPath" )
+        m_aStack.push(TElementStack::value_type(aName, USER_CLASS_PATH));
+}
+
+
+void SAL_CALL  JavaMigration::setPropertyValue(
+        const Any& aValue )
+{
+    if ( m_aStack.empty())
+        return;
+
+    switch (m_aStack.top().second)
+    {
+    case ENABLE_JAVA:
+    {
+        bool val;
+        if (!(aValue >>= val))
+            throw MalformedDataException(
+                   "[Service implementation " IMPL_NAME
+                   "] XLayerHandler::setPropertyValue received wrong type for Enable property", nullptr, Any());
+        if (jfw_setEnabled(val) != JFW_E_NONE)
+            throw WrappedTargetException(
+                   "[Service implementation " IMPL_NAME
+                   "] XLayerHandler::setPropertyValue: jfw_setEnabled failed.", nullptr, Any());
+
+        break;
+    }
+    case USER_CLASS_PATH:
+     {
+         OUString cp;
+         if (!(aValue >>= cp))
+             throw MalformedDataException(
+                       "[Service implementation " IMPL_NAME
+                       "] XLayerHandler::setPropertyValue received wrong type for UserClassPath property", nullptr, Any());
+
+         if (jfw_setUserClassPath(cp) != JFW_E_NONE)
+             throw WrappedTargetException(
+                   "[Service implementation " IMPL_NAME
+                   "] XLayerHandler::setPropertyValue: jfw_setUserClassPath failed.", nullptr, Any());
+         break;
+     }
+    default:
+        OSL_ASSERT(false);
+    }
+}
+
+
+void SAL_CALL JavaMigration::setPropertyValueForLocale(
+        const Any&,
+        const OUString& )
+{
+}
+
+
+void SAL_CALL  JavaMigration::endProperty()
+{
+            if (!m_aStack.empty())
+                m_aStack.pop();
+}
+
+
+void SAL_CALL  JavaMigration::addProperty(
+        const OUString&,
+        sal_Int16,
+        const Type& )
+{
+}
+
+
+void SAL_CALL  JavaMigration::addPropertyWithValue(
+        const OUString&,
+        sal_Int16,
+        const Any& )
+{
+}
+
+void SAL_CALL JavaMigration::addOrReplaceNodeFromTemplate(
+        const OUString&,
+        const TemplateIdentifier&,
+        sal_Int16 )
+{
+}
+
+
+//ToDo enable java, user class path
+
+} //end namespace jfw
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/migration/services/jvmfwk.hxx b/desktop/source/migration/services/jvmfwk.hxx
new file mode 100644
index 000000000..63ec7e717
--- /dev/null
+++ b/desktop/source/migration/services/jvmfwk.hxx
@@ -0,0 +1,33 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+
+namespace migration
+{
+OUString jvmfwk_getImplementationName();
+
+css::uno::Sequence<OUString> jvmfwk_getSupportedServiceNames();
+
+} //end blind namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/migration/services/migrationoo2.component b/desktop/source/migration/services/migrationoo2.component
new file mode 100644
index 000000000..255023566
--- /dev/null
+++ b/desktop/source/migration/services/migrationoo2.component
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.desktop.migration.Basic"
+    constructor="desktop_BasicMigration_get_implementation">
+    <service name="com.sun.star.migration.Basic"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.desktop.migration.Wordbooks"
+    constructor="desktop_WordbookMigration_get_implementation">
+    <service name="com.sun.star.migration.Wordbooks"/>
+  </implementation>
+</component>
diff --git a/desktop/source/migration/services/migrationoo3.component b/desktop/source/migration/services/migrationoo3.component
new file mode 100644
index 000000000..74432e586
--- /dev/null
+++ b/desktop/source/migration/services/migrationoo3.component
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.desktop.migration.OOo3Extensions"
+    constructor="desktop_OO3ExtensionMigration_get_implementation">
+    <service name="com.sun.star.migration.Extensions"/>
+  </implementation>
+</component>
diff --git a/desktop/source/migration/services/misc.hxx b/desktop/source/migration/services/misc.hxx
new file mode 100644
index 000000000..c3b83b82e
--- /dev/null
+++ b/desktop/source/migration/services/misc.hxx
@@ -0,0 +1,39 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+
+#include <vector>
+#include <memory>
+
+
+namespace migration
+{
+
+
+    typedef std::vector< OUString > TStringVector;
+    typedef std::unique_ptr< TStringVector > TStringVectorPtr;
+
+
+}   // namespace migration
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/migration/services/oo3extensionmigration.cxx b/desktop/source/migration/services/oo3extensionmigration.cxx
new file mode 100644
index 000000000..a3f9e02b6
--- /dev/null
+++ b/desktop/source/migration/services/oo3extensionmigration.cxx
@@ -0,0 +1,409 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include "oo3extensionmigration.hxx"
+#include <sal/log.hxx>
+#include <osl/file.hxx>
+#include <tools/diagnose_ex.h>
+#include <unotools/bootstrap.hxx>
+#include <unotools/textsearch.hxx>
+#include <comphelper/sequence.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <rtl/ref.hxx>
+
+#include <com/sun/star/task/XInteractionApprove.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/ucb/SimpleFileAccess.hpp>
+#include <com/sun/star/xml/xpath/XPathAPI.hpp>
+#include <com/sun/star/xml/xpath/XPathException.hpp>
+#include <com/sun/star/xml/dom/DOMException.hpp>
+#include <com/sun/star/xml/dom/DocumentBuilder.hpp>
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/deployment/XExtensionManager.hpp>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace migration
+{
+
+// ExtensionMigration
+
+
+OO3ExtensionMigration::OO3ExtensionMigration(Reference< XComponentContext > const & ctx) :
+m_ctx(ctx)
+{
+}
+
+
+OO3ExtensionMigration::~OO3ExtensionMigration()
+{
+}
+
+void OO3ExtensionMigration::scanUserExtensions( const OUString& sSourceDir, TStringVector& aMigrateExtensions )
+{
+    osl::Directory    aScanRootDir( sSourceDir );
+    osl::FileStatus   fs(osl_FileStatus_Mask_Type | osl_FileStatus_Mask_FileURL);
+    osl::FileBase::RC nRetCode = aScanRootDir.open();
+    if ( nRetCode != osl::Directory::E_None )
+        return;
+
+    sal_uInt32    nHint( 0 );
+    osl::DirectoryItem aItem;
+    while ( aScanRootDir.getNextItem( aItem, nHint ) == osl::Directory::E_None )
+    {
+        if (( aItem.getFileStatus(fs) == osl::FileBase::E_None ) &&
+            ( fs.getFileType() == osl::FileStatus::Directory   ))
+        {
+            //Check next folder as the "real" extension folder is below a temp folder!
+            OUString sExtensionFolderURL = fs.getFileURL();
+
+            osl::Directory     aExtensionRootDir( sExtensionFolderURL );
+
+            nRetCode = aExtensionRootDir.open();
+            if ( nRetCode == osl::Directory::E_None )
+            {
+                osl::DirectoryItem aExtDirItem;
+                while ( aExtensionRootDir.getNextItem( aExtDirItem, nHint ) == osl::Directory::E_None )
+                {
+                    bool bFileStatus = aExtDirItem.getFileStatus(fs) == osl::FileBase::E_None;
+                    bool bIsDir      = fs.getFileType() == osl::FileStatus::Directory;
+
+                    if ( bFileStatus && bIsDir )
+                    {
+                        sExtensionFolderURL = fs.getFileURL();
+                        ScanResult eResult = scanExtensionFolder( sExtensionFolderURL );
+                        if ( eResult == SCANRESULT_MIGRATE_EXTENSION )
+                            aMigrateExtensions.push_back( sExtensionFolderURL );
+                        break;
+                    }
+                }
+            }
+        }
+    }
+}
+
+OO3ExtensionMigration::ScanResult OO3ExtensionMigration::scanExtensionFolder( const OUString& sExtFolder )
+{
+    ScanResult     aResult = SCANRESULT_NOTFOUND;
+    osl::Directory aDir(sExtFolder);
+
+    // get sub dirs
+    if (aDir.open() == osl::FileBase::E_None)
+    {
+        // work through directory contents...
+        osl::DirectoryItem item;
+        osl::FileStatus fs(osl_FileStatus_Mask_Type | osl_FileStatus_Mask_FileURL);
+        TStringVector aDirectories;
+        while ((aDir.getNextItem(item) == osl::FileBase::E_None ) &&
+               ( aResult == SCANRESULT_NOTFOUND ))
+        {
+            if (item.getFileStatus(fs) == osl::FileBase::E_None)
+            {
+                if (fs.getFileType() == osl::FileStatus::Directory)
+                    aDirectories.push_back( fs.getFileURL() );
+                else
+                {
+                    OUString aDirEntryURL = fs.getFileURL();
+                    if ( aDirEntryURL.indexOf( "/description.xml" ) > 0 )
+                        aResult = scanDescriptionXml( aDirEntryURL ) ? SCANRESULT_MIGRATE_EXTENSION : SCANRESULT_DONTMIGRATE_EXTENSION;
+                }
+            }
+        }
+
+        for (auto const& directory : aDirectories)
+        {
+            aResult = scanExtensionFolder(directory);
+            if (aResult != SCANRESULT_NOTFOUND)
+                break;
+        }
+    }
+    return aResult;
+}
+
+bool OO3ExtensionMigration::scanDescriptionXml( const OUString& sDescriptionXmlURL )
+{
+    if ( !m_xDocBuilder.is() )
+    {
+        m_xDocBuilder.set( xml::dom::DocumentBuilder::create(m_ctx) );
+    }
+
+    if ( !m_xSimpleFileAccess.is() )
+    {
+        m_xSimpleFileAccess = ucb::SimpleFileAccess::create(m_ctx);
+    }
+
+    OUString aExtIdentifier;
+    try
+    {
+        uno::Reference< io::XInputStream > xIn =
+            m_xSimpleFileAccess->openFileRead( sDescriptionXmlURL );
+
+        if ( xIn.is() )
+        {
+            uno::Reference< xml::dom::XDocument > xDoc = m_xDocBuilder->parse( xIn );
+            if ( xDoc.is() )
+            {
+                uno::Reference< xml::dom::XElement > xRoot = xDoc->getDocumentElement();
+                if ( xRoot.is() && xRoot->getTagName() == "description" )
+                {
+                    uno::Reference< xml::xpath::XXPathAPI > xPath = xml::xpath::XPathAPI::create(m_ctx);
+
+                    xPath->registerNS("desc", xRoot->getNamespaceURI());
+                    xPath->registerNS("xlink", "http://www.w3.org/1999/xlink");
+
+                    try
+                    {
+                        uno::Reference< xml::dom::XNode > xNode(
+                            xPath->selectSingleNode(
+                                xRoot, "desc:identifier/@value" ));
+                        if ( xNode.is() )
+                            aExtIdentifier = xNode->getNodeValue();
+                    }
+                    catch ( const xml::xpath::XPathException& )
+                    {
+                    }
+                    catch ( const xml::dom::DOMException& )
+                    {
+                    }
+                }
+            }
+        }
+
+        if ( !aExtIdentifier.isEmpty() )
+        {
+            // scan extension identifier and try to match with our black list entries
+            for (const OUString & i : m_aDenyList)
+            {
+                utl::SearchParam param(i, utl::SearchParam::SearchType::Regexp);
+                utl::TextSearch  ts(param, LANGUAGE_DONTKNOW);
+
+                sal_Int32 start = 0;
+                sal_Int32 end = aExtIdentifier.getLength();
+                if (ts.SearchForward(aExtIdentifier, &start, &end))
+                    return false;
+            }
+        }
+    }
+    catch ( const ucb::CommandAbortedException& )
+    {
+    }
+    catch ( const uno::RuntimeException& )
+    {
+    }
+
+    if ( aExtIdentifier.isEmpty() )
+    {
+        // Fallback:
+        // Try to use the folder name to match our black list
+        // as some extensions don't provide an identifier in the
+        // description.xml!
+        for (const OUString & i : m_aDenyList)
+        {
+            utl::SearchParam param(i, utl::SearchParam::SearchType::Regexp);
+            utl::TextSearch  ts(param, LANGUAGE_DONTKNOW);
+
+            sal_Int32 start = 0;
+            sal_Int32 end   = sDescriptionXmlURL.getLength();
+            if (ts.SearchForward(sDescriptionXmlURL, &start, &end))
+                return false;
+        }
+    }
+
+    return true;
+}
+
+void OO3ExtensionMigration::migrateExtension( const OUString& sSourceDir )
+{
+    css::uno::Reference< css::deployment::XExtensionManager > extMgr(
+        deployment::ExtensionManager::get( m_ctx ) );
+    try
+    {
+        rtl::Reference<TmpRepositoryCommandEnv> pCmdEnv = new TmpRepositoryCommandEnv();
+
+        uno::Reference< task::XAbortChannel > xAbortChannel;
+        extMgr->addExtension(
+            sSourceDir, uno::Sequence<beans::NamedValue>(), "user",
+            xAbortChannel, pCmdEnv );
+    }
+    catch ( css::uno::Exception & )
+    {
+        TOOLS_WARN_EXCEPTION(
+            "desktop.migration",
+            "Ignoring UNO Exception while migrating extension from <" << sSourceDir << ">");
+    }
+}
+
+
+// XServiceInfo
+
+
+OUString OO3ExtensionMigration::getImplementationName()
+{
+    return "com.sun.star.comp.desktop.migration.OOo3Extensions";
+}
+
+
+sal_Bool OO3ExtensionMigration::supportsService(OUString const & ServiceName)
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+
+Sequence< OUString > OO3ExtensionMigration::getSupportedServiceNames()
+{
+    return { "com.sun.star.migration.Extensions" };
+}
+
+
+// XInitialization
+
+
+void OO3ExtensionMigration::initialize( const Sequence< Any >& aArguments )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    const Any* pIter = aArguments.getConstArray();
+    const Any* pEnd = pIter + aArguments.getLength();
+    for ( ; pIter != pEnd ; ++pIter )
+    {
+        beans::NamedValue aValue;
+        *pIter >>= aValue;
+        if ( aValue.Name == "UserData" )
+        {
+            if ( !(aValue.Value >>= m_sSourceDir) )
+            {
+                OSL_FAIL( "ExtensionMigration::initialize: argument UserData has wrong type!" );
+            }
+        }
+        else if ( aValue.Name == "ExtensionDenyList" )
+        {
+            Sequence< OUString > aDenyList;
+            if ( (aValue.Value >>= aDenyList ) && aDenyList.hasElements())
+            {
+                m_aDenyList.resize( aDenyList.getLength() );
+                ::comphelper::sequenceToArray< OUString >( m_aDenyList.data(), aDenyList );
+            }
+        }
+    }
+}
+
+Any OO3ExtensionMigration::execute( const Sequence< beans::NamedValue >& )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    ::utl::Bootstrap::PathStatus aStatus = ::utl::Bootstrap::locateUserInstallation( m_sTargetDir );
+    if ( aStatus == ::utl::Bootstrap::PATH_EXISTS )
+    {
+        // copy all extensions
+        OUString sSourceDir = m_sSourceDir +
+            "/user/uno_packages/cache/uno_packages";
+        TStringVector aExtensionToMigrate;
+        scanUserExtensions( sSourceDir, aExtensionToMigrate );
+        for (auto const& extensionToMigrate : aExtensionToMigrate)
+        {
+            migrateExtension(extensionToMigrate);
+        }
+    }
+
+    return Any();
+}
+
+
+// TmpRepositoryCommandEnv
+
+
+TmpRepositoryCommandEnv::TmpRepositoryCommandEnv()
+{
+}
+
+TmpRepositoryCommandEnv::~TmpRepositoryCommandEnv()
+{
+}
+// XCommandEnvironment
+
+uno::Reference< task::XInteractionHandler > TmpRepositoryCommandEnv::getInteractionHandler()
+{
+    return this;
+}
+
+
+uno::Reference< ucb::XProgressHandler > TmpRepositoryCommandEnv::getProgressHandler()
+{
+    return this;
+}
+
+// XInteractionHandler
+void TmpRepositoryCommandEnv::handle(
+    uno::Reference< task::XInteractionRequest> const & xRequest )
+{
+    OSL_ASSERT( xRequest->getRequest().getValueTypeClass() == uno::TypeClass_EXCEPTION );
+
+    bool approve = true;
+
+    // select:
+    uno::Sequence< Reference< task::XInteractionContinuation > > conts(
+        xRequest->getContinuations() );
+    Reference< task::XInteractionContinuation > const * pConts =
+        conts.getConstArray();
+    sal_Int32 len = conts.getLength();
+    for ( sal_Int32 pos = 0; pos < len; ++pos )
+    {
+        if (approve) {
+            uno::Reference< task::XInteractionApprove > xInteractionApprove(
+                pConts[ pos ], uno::UNO_QUERY );
+            if (xInteractionApprove.is()) {
+                xInteractionApprove->select();
+                // don't query again for ongoing continuations:
+                approve = false;
+            }
+        }
+    }
+}
+
+// XProgressHandler
+void TmpRepositoryCommandEnv::push( uno::Any const & /*Status*/ )
+{
+}
+
+
+void TmpRepositoryCommandEnv::update( uno::Any const & /*Status */)
+{
+}
+
+void TmpRepositoryCommandEnv::pop()
+{
+}
+
+
+}   // namespace migration
+
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_OO3ExtensionMigration_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new migration::OO3ExtensionMigration(context));
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/migration/services/oo3extensionmigration.hxx b/desktop/source/migration/services/oo3extensionmigration.hxx
new file mode 100644
index 000000000..586e7e99e
--- /dev/null
+++ b/desktop/source/migration/services/oo3extensionmigration.hxx
@@ -0,0 +1,117 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include "misc.hxx"
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/task/XJob.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/xml/dom/XDocumentBuilder.hpp>
+#include <com/sun/star/ucb/XSimpleFileAccess3.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/ucb/XProgressHandler.hpp>
+
+#include <osl/mutex.hxx>
+#include <cppuhelper/implbase.hxx>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+class INetURLObject;
+
+
+namespace migration
+{
+
+    typedef ::cppu::WeakImplHelper<
+        css::lang::XServiceInfo,
+        css::lang::XInitialization,
+        css::task::XJob > ExtensionMigration_BASE;
+
+    class OO3ExtensionMigration : public ExtensionMigration_BASE
+    {
+    private:
+        css::uno::Reference< css::uno::XComponentContext >      m_ctx;
+        css::uno::Reference< css::xml::dom::XDocumentBuilder >  m_xDocBuilder;
+        css::uno::Reference< css::ucb::XSimpleFileAccess3 >     m_xSimpleFileAccess;
+        ::osl::Mutex            m_aMutex;
+        OUString                m_sSourceDir;
+        OUString                m_sTargetDir;
+        TStringVector           m_aDenyList;
+
+        enum ScanResult
+        {
+            SCANRESULT_NOTFOUND,
+            SCANRESULT_MIGRATE_EXTENSION,
+            SCANRESULT_DONTMIGRATE_EXTENSION
+        };
+
+        ScanResult              scanExtensionFolder( const OUString& sExtFolder );
+        void                    scanUserExtensions( const OUString& sSourceDir, TStringVector& aMigrateExtensions );
+        bool                    scanDescriptionXml( const OUString& sDescriptionXmlFilePath );
+        void                    migrateExtension( const OUString& sSourceDir );
+
+    public:
+        explicit OO3ExtensionMigration(css::uno::Reference<
+            css::uno::XComponentContext > const & ctx);
+        virtual ~OO3ExtensionMigration() override;
+
+        // XServiceInfo
+        virtual OUString SAL_CALL getImplementationName() override;
+        virtual sal_Bool SAL_CALL supportsService( const OUString& rServiceName ) override;
+        virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+        // XInitialization
+        virtual void SAL_CALL initialize( const css::uno::Sequence< css::uno::Any >& aArguments ) override;
+
+        // XJob
+        virtual css::uno::Any SAL_CALL execute(
+            const css::uno::Sequence< css::beans::NamedValue >& Arguments ) override;
+    };
+
+    class TmpRepositoryCommandEnv
+        : public ::cppu::WeakImplHelper< css::ucb::XCommandEnvironment,
+                                          css::task::XInteractionHandler,
+                                          css::ucb::XProgressHandler >
+    {
+    public:
+        virtual ~TmpRepositoryCommandEnv() override;
+        TmpRepositoryCommandEnv();
+
+        // XCommandEnvironment
+        virtual css::uno::Reference< css::task::XInteractionHandler > SAL_CALL
+        getInteractionHandler() override;
+        virtual css::uno::Reference< css::ucb::XProgressHandler >
+        SAL_CALL getProgressHandler() override;
+
+        // XInteractionHandler
+        virtual void SAL_CALL handle(
+            css::uno::Reference< css::task::XInteractionRequest > const & xRequest ) override;
+
+        // XProgressHandler
+        virtual void SAL_CALL push( css::uno::Any const & Status ) override;
+        virtual void SAL_CALL update( css::uno::Any const & Status ) override;
+        virtual void SAL_CALL pop() override;
+    };
+
+
+}   // namespace migration
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/migration/services/wordbookmigration.cxx b/desktop/source/migration/services/wordbookmigration.cxx
new file mode 100644
index 000000000..a3fff8823
--- /dev/null
+++ b/desktop/source/migration/services/wordbookmigration.cxx
@@ -0,0 +1,231 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "wordbookmigration.hxx"
+#include <cppuhelper/supportsservice.hxx>
+#include <tools/urlobj.hxx>
+#include <unotools/bootstrap.hxx>
+#include <unotools/ucbstreamhelper.hxx>
+#include <sal/log.hxx>
+#include <osl/file.hxx>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+
+namespace migration
+{
+    WordbookMigration::WordbookMigration()
+    {
+    }
+
+
+    WordbookMigration::~WordbookMigration()
+    {
+    }
+
+
+    TStringVectorPtr WordbookMigration::getFiles( const OUString& rBaseURL ) const
+    {
+        TStringVectorPtr aResult( new TStringVector );
+        ::osl::Directory aDir( rBaseURL);
+
+        if ( aDir.open() == ::osl::FileBase::E_None )
+        {
+            // iterate over directory content
+            TStringVector aSubDirs;
+            ::osl::DirectoryItem aItem;
+            while ( aDir.getNextItem( aItem ) == ::osl::FileBase::E_None )
+            {
+                ::osl::FileStatus aFileStatus( osl_FileStatus_Mask_Type | osl_FileStatus_Mask_FileURL );
+                if ( aItem.getFileStatus( aFileStatus ) == ::osl::FileBase::E_None )
+                {
+                    if ( aFileStatus.getFileType() == ::osl::FileStatus::Directory )
+                        aSubDirs.push_back( aFileStatus.getFileURL() );
+                    else
+                        aResult->push_back( aFileStatus.getFileURL() );
+                }
+            }
+
+            // iterate recursive over subfolders
+            for (auto const& subDir : aSubDirs)
+            {
+                TStringVectorPtr aSubResult = getFiles(subDir);
+                aResult->insert( aResult->end(), aSubResult->begin(), aSubResult->end() );
+            }
+        }
+
+        return aResult;
+    }
+
+
+    void WordbookMigration::checkAndCreateDirectory( INetURLObject const & rDirURL )
+    {
+        ::osl::FileBase::RC aResult = ::osl::Directory::create( rDirURL.GetMainURL( INetURLObject::DecodeMechanism::ToIUri ) );
+        if ( aResult == ::osl::FileBase::E_NOENT )
+        {
+            INetURLObject aBaseURL( rDirURL );
+            aBaseURL.removeSegment();
+            checkAndCreateDirectory( aBaseURL );
+            ::osl::Directory::create( rDirURL.GetMainURL( INetURLObject::DecodeMechanism::ToIUri ) );
+        }
+    }
+
+#define MAX_HEADER_LENGTH 16
+static bool IsUserWordbook( const OUString& rFile )
+{
+    bool bRet = false;
+    std::unique_ptr<SvStream> pStream = ::utl::UcbStreamHelper::CreateStream( rFile, StreamMode::STD_READ );
+    if ( pStream && !pStream->GetError() )
+    {
+        static const char* const pVerOOo7    = "OOoUserDict1";
+        sal_uInt64 const nSniffPos = pStream->Tell();
+        static std::size_t nVerOOo7Len = sal::static_int_cast< std::size_t >(strlen( pVerOOo7 ));
+        char pMagicHeader[MAX_HEADER_LENGTH];
+        pMagicHeader[ nVerOOo7Len ] = '\0';
+        if (pStream->ReadBytes(static_cast<void *>(pMagicHeader), nVerOOo7Len) == nVerOOo7Len)
+        {
+            if ( !strcmp(pMagicHeader, pVerOOo7) )
+                bRet = true;
+            else
+            {
+                sal_uInt16 nLen;
+                pStream->Seek (nSniffPos);
+                pStream->ReadUInt16( nLen );
+                if ( nLen < MAX_HEADER_LENGTH )
+                {
+                    pStream->ReadBytes(pMagicHeader, nLen);
+                    pMagicHeader[nLen] = '\0';
+                    if ( !strcmp(pMagicHeader, "WBSWG2")
+                     ||  !strcmp(pMagicHeader, "WBSWG5")
+                     ||  !strcmp(pMagicHeader, "WBSWG6") )
+                        bRet = true;
+                }
+            }
+        }
+    }
+
+    return bRet;
+}
+
+
+    void WordbookMigration::copyFiles()
+    {
+        OUString sTargetDir;
+        ::utl::Bootstrap::PathStatus aStatus = ::utl::Bootstrap::locateUserInstallation( sTargetDir );
+        if ( aStatus == ::utl::Bootstrap::PATH_EXISTS )
+        {
+            sTargetDir += "/user/wordbook";
+            TStringVectorPtr aFileList = getFiles( m_sSourceDir );
+            for (auto const& elem : *aFileList)
+            {
+                if (IsUserWordbook(elem) )
+                {
+                    std::u16string_view sSourceLocalName = elem.subView( m_sSourceDir.getLength() );
+                    OUString sTargetName = sTargetDir + sSourceLocalName;
+                    INetURLObject aURL( sTargetName );
+                    aURL.removeSegment();
+                    checkAndCreateDirectory( aURL );
+                    ::osl::FileBase::RC aResult = ::osl::File::copy( elem, sTargetName );
+                    if ( aResult != ::osl::FileBase::E_None )
+                    {
+                        SAL_WARN( "desktop", "WordbookMigration::copyFiles: cannot copy "
+                                     << elem << " to " << sTargetName);
+                    }
+                }
+            }
+        }
+        else
+        {
+            OSL_FAIL( "WordbookMigration::copyFiles: no user installation!" );
+        }
+    }
+
+
+    // XServiceInfo
+
+
+    OUString WordbookMigration::getImplementationName()
+    {
+        return "com.sun.star.comp.desktop.migration.Wordbooks";
+    }
+
+
+    sal_Bool WordbookMigration::supportsService(OUString const & ServiceName)
+    {
+        return cppu::supportsService(this, ServiceName);
+    }
+
+
+    Sequence< OUString > WordbookMigration::getSupportedServiceNames()
+    {
+        return { "com.sun.star.migration.Wordbooks" };
+    }
+
+
+    // XInitialization
+
+
+    void WordbookMigration::initialize( const Sequence< Any >& aArguments )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+
+        const Any* pIter = aArguments.getConstArray();
+        const Any* pEnd = pIter + aArguments.getLength();
+        for ( ; pIter != pEnd ; ++pIter )
+        {
+            beans::NamedValue aValue;
+            *pIter >>= aValue;
+            if ( aValue.Name == "UserData" )
+            {
+                if ( !(aValue.Value >>= m_sSourceDir) )
+                {
+                    OSL_FAIL( "WordbookMigration::initialize: argument UserData has wrong type!" );
+                }
+                m_sSourceDir += "/user/wordbook";
+                break;
+            }
+        }
+    }
+
+
+    // XJob
+
+
+    Any WordbookMigration::execute( const Sequence< beans::NamedValue >& )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+
+        copyFiles();
+
+        return Any();
+    }
+
+}   // namespace migration
+
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_WordbookMigration_get_implementation(
+    css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new migration::WordbookMigration());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/migration/services/wordbookmigration.hxx b/desktop/source/migration/services/wordbookmigration.hxx
new file mode 100644
index 000000000..a6388fa42
--- /dev/null
+++ b/desktop/source/migration/services/wordbookmigration.hxx
@@ -0,0 +1,72 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include "misc.hxx"
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/task/XJob.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <osl/mutex.hxx>
+
+
+class INetURLObject;
+
+
+namespace migration
+{
+
+    typedef ::cppu::WeakImplHelper<
+        css::lang::XServiceInfo,
+        css::lang::XInitialization,
+        css::task::XJob > WordbookMigration_BASE;
+
+    class WordbookMigration : public WordbookMigration_BASE
+    {
+    private:
+        ::osl::Mutex            m_aMutex;
+        OUString         m_sSourceDir;
+
+        TStringVectorPtr        getFiles( const OUString& rBaseURL ) const;
+        void                    checkAndCreateDirectory( INetURLObject const & rDirURL );
+        void                    copyFiles();
+
+    public:
+        WordbookMigration();
+        virtual ~WordbookMigration() override;
+
+        // XServiceInfo
+        virtual OUString SAL_CALL getImplementationName() override;
+        virtual sal_Bool SAL_CALL supportsService( const OUString& rServiceName ) override;
+        virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+        // XInitialization
+        virtual void SAL_CALL initialize( const css::uno::Sequence< css::uno::Any >& aArguments ) override;
+
+        // XJob
+        virtual css::uno::Any SAL_CALL execute(
+            const css::uno::Sequence< css::beans::NamedValue >& Arguments ) override;
+    };
+
+
+}   // namespace migration
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/minidump/minidump.cxx b/desktop/source/minidump/minidump.cxx
new file mode 100644
index 000000000..0bf20f2aa
--- /dev/null
+++ b/desktop/source/minidump/minidump.cxx
@@ -0,0 +1,235 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <desktop/minidump.hxx>
+#include <sal/log.hxx>
+
+#include <map>
+#include <fstream>
+#include <sstream>
+#include <string>
+
+#include <curl/curl.h>
+
+#ifdef _WIN32
+#include <memory>
+#include <windows.h>
+#endif
+
+const char kUserAgent[] = "Breakpad/1.0 (Linux)";
+
+static std::map<std::string, std::string> readStrings(std::istream& file)
+{
+    std::map<std::string, std::string> parameters;
+
+    // when file is not readable, the status eof would not be set
+    // better test of state is okay
+    while (file)
+    {
+        std::string line;
+        std::getline(file, line);
+        int sep = line.find('=');
+        if (sep >= 0)
+        {
+            std::string key = line.substr(0, sep);
+            std::string value = line.substr(sep + 1);
+            parameters[key] = value;
+        }
+    }
+
+    return parameters;
+}
+
+// Callback to get the response data from server.
+static size_t WriteCallback(void const *ptr, size_t size,
+                            size_t nmemb, void *userp)
+{
+  if (!userp)
+    return 0;
+
+  std::string* response = static_cast<std::string *>(userp);
+  size_t real_size = size * nmemb;
+  response->append(static_cast<char const *>(ptr), real_size);
+  return real_size;
+}
+
+static void getProperty(const std::string& key, std::string& value,
+        std::map<std::string, std::string>& parameters)
+{
+    auto itr = parameters.find(key);
+    if (itr != parameters.end())
+    {
+        value = itr->second;
+        parameters.erase(itr);
+    }
+}
+
+static std::string generate_json(const std::map<std::string, std::string>& parameters)
+{
+    std::ostringstream stream;
+    stream << "{\n";
+    bool first = true;
+    for (auto itr = parameters.begin(), itrEnd = parameters.end(); itr != itrEnd; ++itr)
+    {
+        if (!first)
+        {
+            stream << ",\n";
+        }
+        first = false;
+        stream << "\"" << itr->first << "\": \"" << itr->second << "\"";
+    }
+    stream << "\n}";
+
+    return stream.str();
+}
+
+static bool uploadContent(std::map<std::string, std::string>& parameters, std::string& response)
+{
+    CURL* curl = curl_easy_init();
+    if (!curl)
+        return false;
+
+    std::string proxy, proxy_user_pwd, ca_certificate_file, file, url, version;
+
+    getProperty("Proxy", proxy, parameters);
+    getProperty("ProxyUserPW", proxy_user_pwd, parameters);
+    getProperty("CAFile", ca_certificate_file, parameters);
+
+    getProperty("DumpFile", file, parameters);
+    getProperty("URL", url, parameters);
+    getProperty("Version", version, parameters);
+    if (url.empty())
+        return false;
+
+    if (file.empty())
+        return false;
+
+    if (version.empty())
+        return false;
+
+    curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
+    curl_easy_setopt(curl, CURLOPT_USERAGENT, kUserAgent);
+    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, false);
+    // Set proxy information if necessary.
+    if (!proxy.empty())
+    {
+        curl_easy_setopt(curl, CURLOPT_PROXY, proxy.c_str());
+
+        curl_easy_setopt(curl, CURLOPT_PROXYAUTH, CURLAUTH_ANYSAFE);
+
+        if (!proxy_user_pwd.empty())
+            curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, proxy_user_pwd.c_str());
+        else
+            curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, ":");
+    }
+
+    if (!ca_certificate_file.empty())
+        curl_easy_setopt(curl, CURLOPT_CAINFO, ca_certificate_file.c_str());
+
+    curl_mime* mime = curl_mime_init(curl);
+    std::string additional_data = generate_json(parameters);
+    curl_mimepart* part = curl_mime_addpart(mime);
+    curl_mime_name(part, "AdditionalData");
+    curl_mime_data(part, additional_data.c_str(), CURL_ZERO_TERMINATED);
+
+    part = curl_mime_addpart(mime);
+    curl_mime_name(part, "Version");
+    curl_mime_data(part, version.c_str(), CURL_ZERO_TERMINATED);
+
+    part = curl_mime_addpart(mime);
+    curl_mime_name(part, "upload_file_minidump");
+    curl_mime_filedata(part, file.c_str());
+
+    curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);
+
+
+    // Disable 100-continue header.
+    char buf[] = "Expect:";
+    curl_slist* headerlist = nullptr;
+    headerlist = curl_slist_append(headerlist, buf);
+    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
+
+    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
+    std::string response_body;
+    curl_easy_setopt(curl, CURLOPT_WRITEDATA,
+            static_cast<void *>(&response_body));
+
+    // Fail if 400+ is returned from the web server.
+    curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);
+
+    CURLcode cc = curl_easy_perform(curl);
+    long response_code;
+    curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response_code);
+    SAL_WARN_IF(cc != CURLE_OK, "desktop",
+            "Failed to send http request to " <<
+            url.c_str() <<
+            ", error: " <<
+            curl_easy_strerror(cc));
+
+    if (headerlist != nullptr)
+    {
+        curl_slist_free_all(headerlist);
+    }
+
+    response = response_body;
+
+    if( CURLE_OK != cc )
+        return false;
+
+    return true;
+}
+
+namespace crashreport {
+
+bool readConfig(const std::string& iniPath, std::string * response)
+{
+#if defined _WIN32
+    std::wstring iniPathW;
+    const int nChars = MultiByteToWideChar(CP_UTF8, 0, iniPath.c_str(), -1, nullptr, 0);
+    auto buf = std::make_unique<wchar_t[]>(nChars);
+    if (MultiByteToWideChar(CP_UTF8, 0, iniPath.c_str(), -1, buf.get(), nChars) != 0)
+        iniPathW = buf.get();
+
+    std::ifstream file = iniPathW.empty() ? std::ifstream(iniPath) : std::ifstream(iniPathW);
+#else
+    std::ifstream file(iniPath);
+#endif
+    std::map<std::string, std::string> parameters = readStrings(file);
+
+    // make sure that at least the mandatory parameters are in there
+    if (parameters.find("DumpFile") == parameters.end())
+    {
+        if(response != nullptr)
+            *response = "ini file needs to contain a key DumpFile!";
+        return false;
+    }
+
+    if (parameters.find("Version") == parameters.end())
+    {
+        if (response != nullptr)
+            *response = "ini file needs to contain a key Version!";
+        return false;
+    }
+
+    if (parameters.find("URL") == parameters.end())
+    {
+        if (response != nullptr)
+            *response = "ini file needs to contain a key URL!";
+        return false;
+    }
+
+    if (response != nullptr)
+        return uploadContent(parameters, *response);
+
+    return true;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/minidump/minidump_upload.cxx b/desktop/source/minidump/minidump_upload.cxx
new file mode 100644
index 000000000..0434fda68
--- /dev/null
+++ b/desktop/source/minidump/minidump_upload.cxx
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <desktop/minidump.hxx>
+
+#include <iostream>
+#include <string>
+
+#ifdef _WIN32
+#include <memory>
+#include <windows.h>
+
+int wmain(int argc, wchar_t** argv)
+#else
+int main(int argc, char** argv)
+#endif
+{
+    if (argc < 2)
+    {
+        std::cerr << "minidump_upload path_to_ini_file" << std::endl;
+        return EXIT_FAILURE;
+    }
+
+#ifdef _WIN32
+    const int nBytes = WideCharToMultiByte(CP_UTF8, 0, argv[1], -1, nullptr, 0, nullptr, nullptr);
+    auto buf = std::make_unique<char[]>(nBytes);
+    if (WideCharToMultiByte(CP_UTF8, 0, argv[1], -1, buf.get(), nBytes, nullptr, nullptr) == 0)
+        return EXIT_FAILURE;
+    std::string iniPath(buf.get());
+#else
+    std::string iniPath(argv[1]);
+#endif
+    std::string response;
+    if (!crashreport::readConfig(iniPath, &response))
+        return EXIT_FAILURE;
+
+    std::cout << "Response: " << response << std::endl;
+    return EXIT_SUCCESS;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/offacc/acceptor.cxx b/desktop/source/offacc/acceptor.cxx
new file mode 100644
index 000000000..66afe6c18
--- /dev/null
+++ b/desktop/source/offacc/acceptor.cxx
@@ -0,0 +1,247 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include "acceptor.hxx"
+#include <com/sun/star/bridge/BridgeFactory.hpp>
+#include <com/sun/star/connection/Acceptor.hpp>
+#include <com/sun/star/uno/XNamingService.hpp>
+#include <cppuhelper/supportsservice.hxx>
+#include <sal/log.hxx>
+#include <tools/diagnose_ex.h>
+#include <o3tl/string_view.hxx>
+
+using namespace css::bridge;
+using namespace css::connection;
+using namespace css::lang;
+using namespace css::uno;
+
+namespace desktop
+{
+
+extern "C" {
+
+static void offacc_workerfunc (void * acc)
+{
+    osl_setThreadName("URP Acceptor");
+
+    static_cast<Acceptor*>(acc)->run();
+}
+
+}
+
+Acceptor::Acceptor( const Reference< XComponentContext >& rxContext )
+    : m_thread(nullptr)
+    , m_rContext(rxContext)
+    , m_bInit(false)
+    , m_bDying(false)
+{
+    m_rAcceptor = css::connection::Acceptor::create(m_rContext);
+    m_rBridgeFactory = BridgeFactory::create(m_rContext);
+}
+
+
+Acceptor::~Acceptor()
+{
+    m_rAcceptor->stopAccepting();
+    oslThread t;
+    {
+        std::unique_lock g(m_aMutex);
+        t = m_thread;
+    }
+    //prevent locking if the thread is still waiting
+    m_bDying = true;
+    m_cEnable.set();
+    osl_joinWithThread(t);
+    osl_destroyThread(t);
+    {
+        // Make the final state of m_bridges visible to this thread (since
+        // m_thread is joined, the code that follows is the only one left
+        // accessing m_bridges):
+        std::unique_lock g(m_aMutex);
+    }
+    for (;;) {
+        css::uno::Reference< css::bridge::XBridge > b(m_bridges.remove());
+        if (!b.is()) {
+            break;
+        }
+        css::uno::Reference< css::lang::XComponent >(
+            b, css::uno::UNO_QUERY_THROW)->dispose();
+    }
+}
+
+void Acceptor::run()
+{
+    SAL_INFO( "desktop.offacc", "Acceptor::run" );
+    for (;;)
+    {
+        try
+        {
+            // wait until we get enabled
+            SAL_INFO( "desktop.offacc",
+                "Acceptor::run waiting for office to come up");
+            m_cEnable.wait();
+            if (m_bDying) //see destructor
+                break;
+            SAL_INFO( "desktop.offacc",
+                "Acceptor::run now enabled and continuing");
+
+            // accept connection
+            Reference< XConnection > rConnection = m_rAcceptor->accept( m_aConnectString );
+            // if we return without a valid connection we must assume that the acceptor
+            // is destructed so we break out of the run method terminating the thread
+            if (! rConnection.is()) break;
+            OUString aDescription = rConnection->getDescription();
+            SAL_INFO( "desktop.offacc", "Acceptor::run connection " << aDescription );
+
+            // create instanceprovider for this connection
+            Reference< XInstanceProvider > rInstanceProvider(new AccInstanceProvider(m_rContext));
+            // create the bridge. The remote end will have a reference to this bridge
+            // thus preventing the bridge from being disposed. When the remote end releases
+            // the bridge, it will be destructed.
+            Reference< XBridge > rBridge = m_rBridgeFactory->createBridge(
+                "", m_aProtocol, rConnection, rInstanceProvider);
+            std::unique_lock g(m_aMutex);
+            m_bridges.add(rBridge);
+        } catch (const Exception&) {
+            TOOLS_WARN_EXCEPTION("desktop.offacc", "");
+            // connection failed...
+            // something went wrong during connection setup.
+            // just wait for a new connection to accept
+        }
+    }
+}
+
+// XInitialize
+void Acceptor::initialize( const Sequence<Any>& aArguments )
+{
+    // prevent multiple initialization
+    std::unique_lock aGuard( m_aMutex );
+    SAL_INFO( "desktop.offacc", "Acceptor::initialize()" );
+
+    bool bOk = false;
+
+    // arg count
+    int nArgs = aArguments.getLength();
+
+    // not yet initialized and accept-string
+    if (!m_bInit && nArgs > 0 && (aArguments[0] >>= m_aAcceptString))
+    {
+        SAL_INFO( "desktop.offacc", "Acceptor::initialize string=" << m_aAcceptString );
+
+        // get connect string and protocol from accept string
+        // "<connectString>;<protocol>"
+        sal_Int32 nIndex1 = m_aAcceptString.indexOf( ';' );
+        if (nIndex1 < 0)
+            throw IllegalArgumentException(
+                    "Invalid accept-string format", m_rContext, 1);
+        m_aConnectString = o3tl::trim(m_aAcceptString.subView( 0 , nIndex1 ));
+        nIndex1++;
+        sal_Int32 nIndex2 = m_aAcceptString.indexOf( ';' , nIndex1 );
+        if (nIndex2 < 0) nIndex2 = m_aAcceptString.getLength();
+        m_aProtocol = m_aAcceptString.copy( nIndex1, nIndex2 - nIndex1 );
+
+        // start accepting in new thread...
+        m_thread = osl_createThread(offacc_workerfunc, this);
+        m_bInit = true;
+        bOk = true;
+    }
+
+    // do we want to enable accepting?
+    bool bEnable = false;
+    if (((nArgs == 1 && (aArguments[0] >>= bEnable)) ||
+         (nArgs == 2 && (aArguments[1] >>= bEnable))) &&
+        bEnable )
+    {
+        m_cEnable.set();
+        bOk = true;
+    }
+
+    if (!bOk)
+    {
+        throw IllegalArgumentException( "invalid initialization", m_rContext, 1);
+    }
+}
+
+// XServiceInfo
+OUString Acceptor::getImplementationName()
+{
+    return "com.sun.star.office.comp.Acceptor";
+}
+Sequence<OUString> Acceptor::getSupportedServiceNames()
+{
+    return { "com.sun.star.office.Acceptor" };
+}
+
+sal_Bool Acceptor::supportsService(OUString const & ServiceName)
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+
+// InstanceProvider
+AccInstanceProvider::AccInstanceProvider(const Reference<XComponentContext>& rxContext)
+  : m_rContext(rxContext)
+{
+}
+
+AccInstanceProvider::~AccInstanceProvider()
+{
+}
+
+Reference<XInterface> AccInstanceProvider::getInstance (const OUString& aName )
+{
+
+    Reference<XInterface> rInstance;
+
+    if ( aName == "StarOffice.ServiceManager" )
+    {
+        rInstance.set( m_rContext->getServiceManager() );
+    }
+    else if ( aName == "StarOffice.ComponentContext" )
+    {
+        rInstance = m_rContext;
+    }
+    else if ( aName == "StarOffice.NamingService" )
+    {
+        Reference< XNamingService > rNamingService(
+            m_rContext->getServiceManager()->createInstanceWithContext("com.sun.star.uno.NamingService", m_rContext),
+            UNO_QUERY );
+        if ( rNamingService.is() )
+        {
+            rNamingService->registerObject( "StarOffice.ServiceManager", m_rContext->getServiceManager() );
+            rNamingService->registerObject( "StarOffice.ComponentContext", m_rContext );
+            rInstance = rNamingService;
+        }
+    }
+    return rInstance;
+}
+
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_Acceptor_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new desktop::Acceptor(context));
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/offacc/acceptor.hxx b/desktop/source/offacc/acceptor.hxx
new file mode 100644
index 000000000..9e210459a
--- /dev/null
+++ b/desktop/source/offacc/acceptor.hxx
@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/Reference.h>
+#include <com/sun/star/connection/XAcceptor.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/bridge/XInstanceProvider.hpp>
+#include <com/sun/star/bridge/XBridgeFactory2.hpp>
+#include <cppuhelper/implbase.hxx>
+
+#include <comphelper/weakbag.hxx>
+#include <osl/conditn.hxx>
+#include <osl/thread.hxx>
+
+#include <mutex>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+namespace desktop {
+
+class  Acceptor
+    : public ::cppu::WeakImplHelper<css::lang::XServiceInfo, css::lang::XInitialization>
+{
+private:
+    std::mutex m_aMutex;
+
+    oslThread m_thread;
+    comphelper::WeakBag< css::bridge::XBridge > m_bridges;
+
+    ::osl::Condition m_cEnable;
+
+    css::uno::Reference< css::uno::XComponentContext >     m_rContext;
+    css::uno::Reference< css::connection::XAcceptor >      m_rAcceptor;
+    css::uno::Reference< css::bridge::XBridgeFactory2 >    m_rBridgeFactory;
+
+    OUString m_aAcceptString;
+    OUString m_aConnectString;
+    OUString m_aProtocol;
+
+    bool m_bInit;
+    bool m_bDying;
+
+public:
+    explicit Acceptor( const css::uno::Reference< css::uno::XComponentContext >& rxContext );
+    virtual ~Acceptor() override;
+
+    void run();
+
+    // XService info
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& aName ) override;
+
+    // XInitialize
+    virtual void SAL_CALL initialize( const css::uno::Sequence<css::uno::Any>& aArguments ) override;
+};
+
+class AccInstanceProvider : public ::cppu::WeakImplHelper<css::bridge::XInstanceProvider>
+{
+private:
+    css::uno::Reference<css::uno::XComponentContext> m_rContext;
+
+public:
+    AccInstanceProvider(const css::uno::Reference< css::uno::XComponentContext >& rxContext);
+    virtual ~AccInstanceProvider() override;
+
+    // XInstanceProvider
+    virtual css::uno::Reference<css::uno::XInterface> SAL_CALL getInstance (const OUString& aName ) override;
+};
+
+
+} //namespace desktop
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/offacc/offacc.component b/desktop/source/offacc/offacc.component
new file mode 100644
index 000000000..d46f8fac7
--- /dev/null
+++ b/desktop/source/offacc/offacc.component
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.office.comp.Acceptor"
+    constructor="desktop_Acceptor_get_implementation">
+    <service name="com.sun.star.office.Acceptor"/>
+  </implementation>
+</component>
diff --git a/desktop/source/pkgchk/unopkg/unopkg_app.cxx b/desktop/source/pkgchk/unopkg/unopkg_app.cxx
new file mode 100644
index 000000000..a12ee6ae4
--- /dev/null
+++ b/desktop/source/pkgchk/unopkg/unopkg_app.cxx
@@ -0,0 +1,636 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <dp_misc.h>
+#include "unopkg_main.h"
+#include "unopkg_shared.h"
+#include <dp_identifier.hxx>
+#include <tools/extendapplicationenvironment.hxx>
+#include <rtl/bootstrap.hxx>
+#include <osl/process.h>
+#include <osl/conditn.hxx>
+#include <unotools/tempfile.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <comphelper/anytostring.hxx>
+#include <comphelper/logging.hxx>
+#include <comphelper/sequence.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+
+#include <com/sun/star/deployment/ui/PackageManagerDialog.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/logging/ConsoleHandler.hpp>
+#include <com/sun/star/logging/FileHandler.hpp>
+#include <com/sun/star/logging/LogLevel.hpp>
+#include <com/sun/star/logging/SimpleTextFormatter.hpp>
+#include <com/sun/star/logging/XLogger.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ui/dialogs/XDialogClosedListener.hpp>
+#if defined(UNX)
+  #include <unistd.h>
+#endif
+#include <utility>
+#include <vector>
+
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::logging;
+using namespace ::com::sun::star::uno;
+using namespace ::unopkg;
+
+namespace {
+
+struct ExtensionName
+{
+    OUString m_str;
+    explicit ExtensionName( OUString str ) : m_str(std::move( str )) {}
+    bool operator () ( Reference<deployment::XPackage> const & e ) const
+    {
+        return m_str == dp_misc::getIdentifier(e)
+             ||  m_str == e->getName();
+    }
+};
+
+
+const char16_t s_usingText [] =
+u"\n"
+"using: " APP_NAME " add <options> extension-path...\n"
+"       " APP_NAME " validate <options> extension-identifier...\n"
+"       " APP_NAME " remove <options> extension-identifier...\n"
+"       " APP_NAME " list <options> extension-identifier...\n"
+"       " APP_NAME " reinstall <options>\n"
+"       " APP_NAME " gui\n"
+"       " APP_NAME " -V\n"
+"       " APP_NAME " -h\n"
+"\n"
+"sub-commands:\n"
+" add                     add extension\n"
+" validate                checks the prerequisites of an installed extension and\n"
+"                         registers it if possible\n"
+" remove                  remove extensions by identifier\n"
+" reinstall               expert feature: reinstall all deployed extensions\n"
+" list                    list information about deployed extensions\n"
+" gui                     raise Extension Manager Graphical User Interface (GUI)\n"
+"\n"
+"options:\n"
+" -h, --help              this help\n"
+" -V, --version           version information\n"
+" -v, --verbose           verbose output\n"
+" -f, --force             force overwriting existing extensions\n"
+" -s, --suppress-license  prevents showing the license\n"
+" --log-file <file>       custom log file; default: <cache-dir>/log.txt\n"
+" --shared                expert feature: operate on shared installation\n"
+"                                         deployment context;\n"
+"                                         run only when no concurrent Office\n"
+"                                         process(es) are running!\n"
+" --bundled               expert feature: operate on bundled extensions. Only\n"
+"                                         works with list, validate, reinstall;\n"
+" --deployment-context    expert feature: explicit deployment context\n"
+"     <context>\n"
+"\n"
+"To learn more about the Extension Manager and extensions, see:\n"
+"https://wiki.documentfoundation.org/Documentation/DevGuide/Extensions\n\n";
+
+
+const OptionInfo s_option_infos [] = {
+    { RTL_CONSTASCII_STRINGPARAM("help"), 'h', false },
+    { RTL_CONSTASCII_STRINGPARAM("version"), 'V', false },
+    { RTL_CONSTASCII_STRINGPARAM("verbose"), 'v', false },
+    { RTL_CONSTASCII_STRINGPARAM("force"), 'f', false },
+    { RTL_CONSTASCII_STRINGPARAM("log-file"), '\0', true },
+    { RTL_CONSTASCII_STRINGPARAM("shared"), '\0', false },
+    { RTL_CONSTASCII_STRINGPARAM("deployment-context"), '\0', true },
+    { RTL_CONSTASCII_STRINGPARAM("bundled"), '\0', false},
+    { RTL_CONSTASCII_STRINGPARAM("suppress-license"), 's', false},
+
+    { nullptr, 0, '\0', false }
+};
+
+class DialogClosedListenerImpl :
+    public ::cppu::WeakImplHelper< ui::dialogs::XDialogClosedListener >
+{
+    osl::Condition & m_rDialogClosedCondition;
+
+public:
+    explicit DialogClosedListenerImpl( osl::Condition & rDialogClosedCondition )
+        : m_rDialogClosedCondition( rDialogClosedCondition ) {}
+
+    // XEventListener (base of XDialogClosedListener)
+    virtual void SAL_CALL disposing( lang::EventObject const & Source ) override;
+
+    // XDialogClosedListener
+    virtual void SAL_CALL dialogClosed(
+        ui::dialogs::DialogClosedEvent const & aEvent ) override;
+};
+
+// XEventListener (base of XDialogClosedListener)
+void DialogClosedListenerImpl::disposing( lang::EventObject const & )
+{
+    // nothing to do
+}
+
+// XDialogClosedListener
+void DialogClosedListenerImpl::dialogClosed(
+    ui::dialogs::DialogClosedEvent const & )
+{
+    m_rDialogClosedCondition.set();
+}
+
+// If a package had been installed with a pre OOo 2.2, it could not normally be
+// found via its identifier; similarly (and for ease of use), a package
+// installed with OOo 2.2 or later could not normally be found via its file
+// name.
+Reference<deployment::XPackage> findPackage(
+    OUString const & repository,
+    Reference<deployment::XExtensionManager> const & manager,
+    Reference<ucb::XCommandEnvironment > const & environment,
+    std::u16string_view idOrFileName )
+{
+    const Sequence< Reference<deployment::XPackage> > ps(
+        manager->getDeployedExtensions(repository,
+            Reference<task::XAbortChannel>(), environment ) );
+    for ( auto const & package : ps )
+        if ( dp_misc::getIdentifier( package ) == idOrFileName )
+            return package;
+    for ( auto const & package : ps )
+        if ( package->getName() == idOrFileName )
+            return package;
+    return Reference<deployment::XPackage>();
+}
+
+} // anon namespace
+
+extern "C" int unopkg_main()
+{
+    tools::extendApplicationEnvironment();
+    bool bShowFailedMsg = true;
+    OUString subCommand;
+    bool option_shared = false;
+    bool option_force = false;
+    bool option_verbose = false;
+    bool option_bundled = false;
+    bool option_suppressLicense = false;
+    bool option_help = false;
+    bool subcmd_gui = false;
+    OUString logFile;
+    OUString repository;
+    OUString cmdArg;
+    std::vector<OUString> cmdPackages;
+    Reference<XLogHandler> xFileHandler;
+    Reference<XLogHandler> xConsoleHandler;
+    std::unique_ptr<comphelper::EventLogger> logger;
+    std::unique_ptr<utl::TempFile> pUserProfileTempDir;
+
+    OptionInfo const * info_shared = getOptionInfo(
+        s_option_infos, "shared" );
+    OptionInfo const * info_force = getOptionInfo(
+        s_option_infos, "force" );
+    OptionInfo const * info_verbose = getOptionInfo(
+        s_option_infos, "verbose" );
+    OptionInfo const * info_log = getOptionInfo(
+        s_option_infos, "log-file" );
+    OptionInfo const * info_context = getOptionInfo(
+        s_option_infos, "deployment-context" );
+    OptionInfo const * info_help = getOptionInfo(
+        s_option_infos, "help" );
+    OptionInfo const * info_version = getOptionInfo(
+        s_option_infos, "version" );
+    OptionInfo const * info_bundled = getOptionInfo(
+        s_option_infos, "bundled" );
+    OptionInfo const * info_suppressLicense = getOptionInfo(
+        s_option_infos, "suppress-license" );
+
+
+    Reference<XComponentContext> xComponentContext;
+    Reference<XComponentContext> xLocalComponentContext;
+
+    try {
+        sal_uInt32 nPos = 0;
+        sal_uInt32 nCount = osl_getCommandArgCount();
+        if (nCount == 0 || isOption( info_help, &nPos ))
+        {
+            dp_misc::writeConsole(s_usingText);
+            return 0;
+        }
+        else if (isOption( info_version, &nPos )) {
+            dp_misc::writeConsole(u"\n" APP_NAME " Version 3.3\n");
+            return 0;
+        }
+        //consume all bootstrap variables which may occur before the sub-command
+        while(isBootstrapVariable(&nPos))
+            ;
+
+        if(nPos >= nCount)
+            return 0;
+        //get the sub-command
+        osl_getCommandArg( nPos, &subCommand.pData );
+        ++nPos;
+        subCommand = subCommand.trim();
+        bool subcmd_add = subCommand == "add";
+        subcmd_gui = subCommand == "gui";
+
+        // sub-command options and packages:
+        while (nPos < nCount)
+        {
+            if (readArgument( &cmdArg, info_log, &nPos )) {
+                logFile = makeAbsoluteFileUrl(
+                    cmdArg.trim(), getProcessWorkingDir() );
+            }
+            else if (!readOption( &option_verbose, info_verbose, &nPos ) &&
+                     !readOption( &option_shared, info_shared, &nPos ) &&
+                     !readOption( &option_force, info_force, &nPos ) &&
+                     !readOption( &option_bundled, info_bundled, &nPos ) &&
+                     !readOption( &option_suppressLicense, info_suppressLicense, &nPos ) &&
+                     !readOption( &option_help, info_help, &nPos ) &&
+                     !readArgument( &repository, info_context, &nPos ) &&
+                     !isBootstrapVariable(&nPos))
+            {
+                osl_getCommandArg( nPos, &cmdArg.pData );
+                ++nPos;
+                cmdArg = cmdArg.trim();
+                if (!cmdArg.isEmpty())
+                {
+                    if (cmdArg[ 0 ] == '-')
+                    {
+                        // is option:
+                        dp_misc::writeConsoleError(OUStringConcatenation(
+                                 "\nERROR: unexpected option " +
+                                 cmdArg +
+                                 "!\n       Use " APP_NAME " " +
+                                 toString(info_help) +
+                                 " to print all options.\n"));
+                        return 1;
+                    }
+                    else
+                    {
+                        // is package:
+                        cmdPackages.push_back(
+                            subcmd_add || subcmd_gui
+                            ? makeAbsoluteFileUrl(
+                                cmdArg, getProcessWorkingDir() )
+                            : cmdArg );
+                    }
+                }
+            }
+        }
+
+        // tdf#129917 Use temp user profile when installing shared extensions
+        if (option_shared)
+        {
+            pUserProfileTempDir.reset(new utl::TempFile(nullptr, true));
+            pUserProfileTempDir->EnableKillingFile();
+        }
+
+        xComponentContext = getUNO(option_verbose, subcmd_gui,
+                                   pUserProfileTempDir ? pUserProfileTempDir->GetURL() : "",
+                                   xLocalComponentContext);
+
+        // Initialize logging. This will log errors to the console and
+        // also to file if the --log-file parameter was provided.
+        logger.reset(new comphelper::EventLogger(xLocalComponentContext, "unopkg"));
+        const Reference<XLogger> xLogger(logger->getLogger());
+        xLogger->setLevel(LogLevel::WARNING);
+        Reference<XLogFormatter> xLogFormatter(SimpleTextFormatter::create(xLocalComponentContext));
+        Sequence < beans::NamedValue > aSeq { { "Formatter", Any(xLogFormatter) } };
+
+        xConsoleHandler.set(ConsoleHandler::createWithSettings(xLocalComponentContext, aSeq));
+        xLogger->addLogHandler(xConsoleHandler);
+        xConsoleHandler->setLevel(LogLevel::WARNING);
+        xLogger->setLevel(LogLevel::WARNING);
+
+
+        if (!logFile.isEmpty())
+        {
+            Sequence < beans::NamedValue > aSeq2 { { "Formatter", Any(xLogFormatter) }, {"FileURL", Any(logFile)} };
+            xFileHandler.set(css::logging::FileHandler::createWithSettings(xLocalComponentContext, aSeq2));
+            xFileHandler->setLevel(LogLevel::WARNING);
+            xLogger->addLogHandler(xFileHandler);
+        }
+
+        if (option_verbose)
+        {
+            xLogger->setLevel(LogLevel::INFO);
+            xConsoleHandler->setLevel(LogLevel::INFO);
+            if (xFileHandler.is())
+                xFileHandler->setLevel(LogLevel::INFO);
+        }
+
+        if (repository.isEmpty())
+        {
+            if (option_shared)
+                repository = "shared";
+            else if (option_bundled)
+                repository = "bundled";
+            else
+                repository = "user";
+        }
+        else
+        {
+            if ( repository == "shared" ) {
+                option_shared = true;
+            }
+            else if (option_shared)
+            {
+                logger->log(LogLevel::WARNING, "Explicit context given! Ignoring option '$1$'",  toString(info_shared));
+            }
+        }
+#if defined(UNX)
+        if ( geteuid() == 0 )
+        {
+            if ( !(option_shared || option_bundled || option_help) )
+            {
+                logger->log(LogLevel::SEVERE, "Cannot run $1$ as root without $2$ or $3$ option.",
+                           APP_NAME, toString(info_shared), toString(info_bundled));
+                return 1;
+            }
+        }
+#endif
+
+        if (subCommand == "reinstall")
+        {
+            //We must prevent that services and types are loaded by UNO,
+            //otherwise we cannot delete the registry data folder.
+            OUString extensionUnorc;
+            if (repository == "user")
+                extensionUnorc = "$UNO_USER_PACKAGES_CACHE/registry/com.sun.star.comp.deployment.component.PackageRegistryBackend/unorc";
+            else if (repository == "shared")
+                extensionUnorc = "$SHARED_EXTENSIONS_USER/registry/com.sun.star.comp.deployment.component.PackageRegistryBackend/unorc";
+            else if (repository == "bundled")
+                extensionUnorc = "$BUNDLED_EXTENSIONS_USER/registry/com.sun.star.comp.deployment.component.PackageRegistryBackend/unorc";
+            else
+                OSL_ASSERT(false);
+
+            ::rtl::Bootstrap::expandMacros(extensionUnorc);
+            oslFileError e = osl_removeFile(extensionUnorc.pData);
+            if (e != osl_File_E_None && e != osl_File_E_NOENT)
+                throw Exception("Could not delete " + extensionUnorc, nullptr);
+        }
+
+        Reference<deployment::XExtensionManager> xExtensionManager(
+            deployment::ExtensionManager::get( xComponentContext ) );
+
+        Reference<css::ucb::XCommandEnvironment> xCmdEnv(
+            createCmdEnv(xComponentContext, option_force, option_verbose, option_suppressLicense));
+
+        //synchronize bundled/shared extensions
+        //Do not synchronize when command is "reinstall". This could add types and services to UNO and
+        //prevent the deletion of the registry data folder
+        //syncing is done in XExtensionManager.reinstall
+        if (!subcmd_gui && subCommand != "reinstall"
+            && ! dp_misc::office_is_running())
+            dp_misc::syncRepositories(false, xCmdEnv);
+
+        if ( subcmd_add || subCommand == "remove" )
+        {
+            for (const OUString & cmdPackage : cmdPackages)
+            {
+                if (subcmd_add)
+                {
+                    beans::NamedValue nvSuppress(
+                        "SUPPRESS_LICENSE", option_suppressLicense ?
+                        Any(OUString("1")):Any(OUString("0")));
+                    xExtensionManager->addExtension(
+                            cmdPackage, Sequence<beans::NamedValue>(&nvSuppress, 1),
+                            repository, Reference<task::XAbortChannel>(), xCmdEnv);
+                }
+                else
+                {
+                    try
+                    {
+                        xExtensionManager->removeExtension(
+                            cmdPackage, cmdPackage, repository,
+                            Reference<task::XAbortChannel>(), xCmdEnv );
+                    }
+                    catch (const lang::IllegalArgumentException &)
+                    {
+                        Reference<deployment::XPackage> p(
+                             findPackage(repository,
+                                xExtensionManager, xCmdEnv, cmdPackage ) );
+                        if ( !p.is())
+                            throw;
+                        else if (p.is())
+                            xExtensionManager->removeExtension(
+                                ::dp_misc::getIdentifier(p), p->getName(),
+                                repository,
+                                Reference<task::XAbortChannel>(), xCmdEnv );
+                    }
+                }
+            }
+        }
+        else if ( subCommand == "reinstall" )
+        {
+            xExtensionManager->reinstallDeployedExtensions(
+                false, repository, Reference<task::XAbortChannel>(), xCmdEnv);
+        }
+        else if ( subCommand == "list" )
+        {
+            std::vector<Reference<deployment::XPackage> > vecExtUnaccepted;
+            ::comphelper::sequenceToContainer(vecExtUnaccepted,
+                    xExtensionManager->getExtensionsWithUnacceptedLicenses(
+                        repository, xCmdEnv));
+
+            //This vector tells what XPackage  in allExtensions has an
+            //unaccepted license.
+            std::vector<bool> vecUnaccepted;
+            std::vector<Reference<deployment::XPackage> > allExtensions;
+            if (cmdPackages.empty())
+            {
+                Sequence< Reference<deployment::XPackage> >
+                    packages = xExtensionManager->getDeployedExtensions(
+                        repository, Reference<task::XAbortChannel>(), xCmdEnv );
+
+                std::vector<Reference<deployment::XPackage> > vec_packages;
+                ::comphelper::sequenceToContainer(vec_packages, packages);
+
+                //First copy the extensions with the unaccepted license
+                //to vector allExtensions.
+                allExtensions.resize(vecExtUnaccepted.size() + vec_packages.size());
+
+                std::vector<Reference<deployment::XPackage> >::iterator i_all_ext =
+                      std::copy(vecExtUnaccepted.begin(), vecExtUnaccepted.end(),
+                                  allExtensions.begin());
+                //Now copy those we got from getDeployedExtensions
+                std::copy(vec_packages.begin(), vec_packages.end(), i_all_ext);
+
+                //Now prepare the vector which tells what extension has an
+                //unaccepted license
+                vecUnaccepted.resize(vecExtUnaccepted.size() + vec_packages.size());
+                std::fill_n(vecUnaccepted.begin(), vecExtUnaccepted.size(), true);
+                std::fill_n(vecUnaccepted.begin() + vecExtUnaccepted.size(),
+                      vec_packages.size(), false);
+
+                dp_misc::writeConsole(
+                    OUStringConcatenation("All deployed " + repository + " extensions:\n\n"));
+            }
+            else
+            {
+                //The user provided the names (ids or file names) of the extensions
+                //which shall be listed
+                for (const OUString & cmdPackage : cmdPackages)
+                {
+                    Reference<deployment::XPackage> extension;
+                    try
+                    {
+                        extension = xExtensionManager->getDeployedExtension(
+                            repository, cmdPackage, cmdPackage, xCmdEnv );
+                    }
+                    catch (const lang::IllegalArgumentException &)
+                    {
+                        extension = findPackage(repository,
+                            xExtensionManager, xCmdEnv, cmdPackage );
+                    }
+
+                    //Now look if the requested extension has an unaccepted license
+                    bool bUnacceptedLic = false;
+                    if (!extension.is())
+                    {
+                        std::vector<Reference<deployment::XPackage> >::const_iterator
+                            i = std::find_if(
+                                vecExtUnaccepted.begin(),
+                                vecExtUnaccepted.end(), ExtensionName(cmdPackage));
+                        if (i != vecExtUnaccepted.end())
+                        {
+                            extension = *i;
+                            bUnacceptedLic = true;
+                        }
+                    }
+
+                    if (!extension.is())
+                        throw lang::IllegalArgumentException(
+                            "There is no such extension deployed: " +
+                            cmdPackage,nullptr,-1);
+                    allExtensions.push_back(extension);
+                    vecUnaccepted.push_back(bUnacceptedLic);
+                }
+
+            }
+
+            printf_packages(allExtensions, vecUnaccepted, xCmdEnv );
+        }
+        else if ( subCommand == "validate" )
+        {
+            std::vector<Reference<deployment::XPackage> > vecExtUnaccepted;
+            ::comphelper::sequenceToContainer(
+                vecExtUnaccepted, xExtensionManager->getExtensionsWithUnacceptedLicenses(
+                    repository, xCmdEnv));
+
+            for (const OUString & cmdPackage : cmdPackages)
+            {
+                Reference<deployment::XPackage> extension;
+                try
+                {
+                    extension = xExtensionManager->getDeployedExtension(
+                        repository, cmdPackage, cmdPackage, xCmdEnv );
+                }
+                catch (const lang::IllegalArgumentException &)
+                {
+                    extension = findPackage(
+                        repository, xExtensionManager, xCmdEnv, cmdPackage );
+                }
+
+                if (!extension.is())
+                {
+                    std::vector<Reference<deployment::XPackage> >::const_iterator
+                        i = std::find_if(
+                            vecExtUnaccepted.begin(),
+                            vecExtUnaccepted.end(), ExtensionName(cmdPackage));
+                    if (i != vecExtUnaccepted.end())
+                    {
+                        extension = *i;
+                    }
+                }
+
+                if (extension.is())
+                    xExtensionManager->checkPrerequisitesAndEnable(
+                        extension, Reference<task::XAbortChannel>(), xCmdEnv);
+            }
+        }
+        else if ( subCommand == "gui" )
+        {
+            Reference<ui::dialogs::XAsynchronousExecutableDialog> xDialog(
+                deployment::ui::PackageManagerDialog::createAndInstall(
+                    xComponentContext,
+                    !cmdPackages.empty() ? cmdPackages[0] : OUString() ));
+
+            osl::Condition dialogEnded;
+            dialogEnded.reset();
+
+            Reference< ui::dialogs::XDialogClosedListener > xListener(
+                new DialogClosedListenerImpl( dialogEnded ) );
+
+            xDialog->startExecuteModal(xListener);
+            dialogEnded.wait();
+            return 0;
+        }
+        else
+        {
+            logger->log(LogLevel::SEVERE,
+                       "Unknown sub-command: '$1$'. Use $2$ $3$ to print all options.",
+                       subCommand, APP_NAME, toString(info_help));
+            return 1;
+        }
+
+        logger->log(LogLevel::INFO, "$1$ done.", APP_NAME);
+        //Force to release all bridges which connect us to the child processes
+        dp_misc::disposeBridges(xLocalComponentContext);
+        css::uno::Reference<css::lang::XComponent>(
+            xLocalComponentContext, css::uno::UNO_QUERY_THROW)->dispose();
+        return 0;
+    }
+    catch (const ucb::CommandFailedException &e)
+    {
+        logger->log(LogLevel::SEVERE, "Exception occurred: $1$", e.Message);
+    }
+    catch (const ucb::CommandAbortedException &)
+    {
+        logger->log(LogLevel::SEVERE, "$1$ aborted.", APP_NAME);
+        bShowFailedMsg = false;
+    }
+    catch (const deployment::DeploymentException & exc)
+    {
+        logger->log(LogLevel::SEVERE, "Exception occurred: $1$", exc.Message);
+        logger->log(LogLevel::INFO, "    Cause: $1$", comphelper::anyToString(exc.Cause));
+    }
+    catch (const LockFileException & e)
+    {
+        // No logger since it requires UNO which we don't have here
+        dp_misc::writeConsoleError(OUStringConcatenation(e.Message + "\n"));
+        bShowFailedMsg = false;
+    }
+    catch (const css::uno::Exception & e ) {
+        Any exc( ::cppu::getCaughtException() );
+
+        logger->log(LogLevel::SEVERE, "Exception occurred: $1$", e.Message);
+        logger->log(LogLevel::INFO, "    Cause: $1$", comphelper::anyToString(exc));
+    }
+    if (bShowFailedMsg)
+        logger->log(LogLevel::SEVERE, "$1$ failed.", APP_NAME);
+    dp_misc::disposeBridges(xLocalComponentContext);
+    if (xLocalComponentContext.is()) {
+        css::uno::Reference<css::lang::XComponent>(
+            xLocalComponentContext, css::uno::UNO_QUERY_THROW)->dispose();
+    }
+    return 1;
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/pkgchk/unopkg/unopkg_cmdenv.cxx b/desktop/source/pkgchk/unopkg/unopkg_cmdenv.cxx
new file mode 100644
index 000000000..cca5b7ae3
--- /dev/null
+++ b/desktop/source/pkgchk/unopkg/unopkg_cmdenv.cxx
@@ -0,0 +1,390 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <strings.hrc>
+#include <dp_misc.h>
+#include <dp_shared.hxx>
+#include "unopkg_shared.h"
+#include <i18nlangtag/languagetag.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/anytostring.hxx>
+#include <tools/diagnose_ex.h>
+#include <unotools/configmgr.hxx>
+#include <com/sun/star/lang/WrappedTargetException.hpp>
+#include <com/sun/star/task/XInteractionAbort.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/InstallException.hpp>
+#include <com/sun/star/deployment/LicenseException.hpp>
+#include <com/sun/star/deployment/VersionException.hpp>
+#include <com/sun/star/deployment/PlatformException.hpp>
+#include <com/sun/star/i18n/Collator.hpp>
+#include <com/sun/star/i18n/CollatorOptions.hpp>
+
+#include <dp_version.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::ucb;
+using namespace ::com::sun::star::uno;
+using namespace ::unopkg;
+
+
+namespace {
+
+
+class CommandEnvironmentImpl
+    : public ::cppu::WeakImplHelper< XCommandEnvironment,
+                                      task::XInteractionHandler,
+                                      XProgressHandler >
+{
+    sal_Int32 m_logLevel;
+    bool m_option_force_overwrite;
+    bool m_option_verbose;
+    bool m_option_suppress_license;
+    Reference< XComponentContext > m_xComponentContext;
+    Reference< XProgressHandler > m_xLogFile;
+
+    /// @throws RuntimeException
+    void update_( Any const & Status );
+    void printLicense(std::u16string_view sName,std::u16string_view sLicense,
+                      bool & accept, bool & decline);
+
+public:
+    virtual ~CommandEnvironmentImpl() override;
+    CommandEnvironmentImpl(
+        Reference<XComponentContext> const & xComponentContext,
+        bool option_force_overwrite,
+        bool option_verbose,
+        bool option_suppress_license);
+
+    // XCommandEnvironment
+    virtual Reference< task::XInteractionHandler > SAL_CALL
+    getInteractionHandler() override;
+    virtual Reference< XProgressHandler > SAL_CALL getProgressHandler() override;
+
+    // XInteractionHandler
+    virtual void SAL_CALL handle(
+        Reference< task::XInteractionRequest > const & xRequest ) override;
+
+    // XProgressHandler
+    virtual void SAL_CALL push( Any const & Status ) override;
+    virtual void SAL_CALL update( Any const & Status ) override;
+    virtual void SAL_CALL pop() override;
+};
+
+
+CommandEnvironmentImpl::CommandEnvironmentImpl(
+    Reference<XComponentContext> const & xComponentContext,
+    bool option_force_overwrite,
+    bool option_verbose,
+    bool option_suppressLicense)
+    : m_logLevel(0),
+      m_option_force_overwrite( option_force_overwrite ),
+      m_option_verbose( option_verbose ),
+      m_option_suppress_license( option_suppressLicense ),
+      m_xComponentContext(xComponentContext)
+{
+    m_xLogFile.set(
+        xComponentContext->getServiceManager()
+        ->createInstanceWithArgumentsAndContext(
+            "com.sun.star.comp.deployment.ProgressLog",
+            Sequence<Any>(), xComponentContext ),
+        UNO_QUERY_THROW );
+}
+
+
+CommandEnvironmentImpl::~CommandEnvironmentImpl()
+{
+    try {
+        Reference< lang::XComponent > xComp( m_xLogFile, UNO_QUERY );
+        if (xComp.is())
+            xComp->dispose();
+    }
+    catch (const RuntimeException &) {
+        TOOLS_WARN_EXCEPTION( "desktop", "" );
+    }
+}
+
+//May throw exceptions
+void CommandEnvironmentImpl::printLicense(
+    std::u16string_view sName, std::u16string_view sLicense, bool & accept, bool &decline)
+{
+    OUString s1tmp(DpResId(RID_STR_UNOPKG_ACCEPT_LIC_1));
+    OUString s1(s1tmp.replaceAll("$NAME", sName));
+    OUString s2 = DpResId(RID_STR_UNOPKG_ACCEPT_LIC_2);
+    OUString s3 = DpResId(RID_STR_UNOPKG_ACCEPT_LIC_3);
+    OUString s4 = DpResId(RID_STR_UNOPKG_ACCEPT_LIC_4);
+    OUString sYES = DpResId(RID_STR_UNOPKG_ACCEPT_LIC_YES);
+    OUString sY = DpResId(RID_STR_UNOPKG_ACCEPT_LIC_Y);
+    OUString sNO = DpResId(RID_STR_UNOPKG_ACCEPT_LIC_NO);
+    OUString sN = DpResId(RID_STR_UNOPKG_ACCEPT_LIC_N);
+
+    OUString sNewLine("\n");
+
+    dp_misc::writeConsole(OUStringConcatenation(sNewLine + sNewLine + s1 + sNewLine + sNewLine));
+    dp_misc::writeConsole(OUStringConcatenation(sLicense + sNewLine + sNewLine));
+    dp_misc::writeConsole(OUStringConcatenation(s2 + sNewLine));
+    dp_misc::writeConsole(s3);
+
+    //the user may enter "yes" or "no", we compare in a case insensitive way
+    Reference< css::i18n::XCollator > xCollator =
+        css::i18n::Collator::create( m_xComponentContext );
+    xCollator->loadDefaultCollator(
+        LanguageTag(utl::ConfigManager::getUILocale()).getLocale(),
+        css::i18n::CollatorOptions::CollatorOptions_IGNORE_CASE);
+
+    do
+    {
+        OUString sAnswer = dp_misc::readConsole();
+        if (xCollator->compareString(sAnswer, sYES) == 0
+            || xCollator->compareString(sAnswer, sY) == 0)
+        {
+            accept = true;
+            break;
+        }
+        else if(xCollator->compareString(sAnswer, sNO) == 0
+            || xCollator->compareString(sAnswer, sN) == 0)
+        {
+            decline = true;
+            break;
+        }
+        else
+        {
+            dp_misc::writeConsole(OUStringConcatenation(sNewLine + sNewLine + s4 + sNewLine));
+        }
+    }
+    while(true);
+}
+
+// XCommandEnvironment
+
+Reference< task::XInteractionHandler >
+CommandEnvironmentImpl::getInteractionHandler()
+{
+    return this;
+}
+
+
+Reference< XProgressHandler > CommandEnvironmentImpl::getProgressHandler()
+{
+    return this;
+}
+
+// XInteractionHandler
+
+void CommandEnvironmentImpl::handle(
+    Reference<task::XInteractionRequest> const & xRequest )
+{
+    Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == TypeClass_EXCEPTION );
+    dp_misc::TRACE("[unopkg_cmdenv.cxx] incoming request:\n"
+        + ::comphelper::anyToString(request) + "\n\n");
+
+    // selections:
+    bool approve = false;
+    bool abort = false;
+
+    lang::WrappedTargetException wtExc;
+    deployment::LicenseException licExc;
+    deployment::InstallException instExc;
+    deployment::PlatformException platExc;
+
+    if (request >>= wtExc) {
+        // ignore intermediate errors of legacy packages, i.e.
+        // former pkgchk behaviour:
+        const Reference<deployment::XPackage> xPackage(
+            wtExc.Context, UNO_QUERY );
+        OSL_ASSERT( xPackage.is() );
+        if (xPackage.is()) {
+            const Reference<deployment::XPackageTypeInfo> xPackageType(
+                xPackage->getPackageType() );
+            OSL_ASSERT( xPackageType.is() );
+            if (xPackageType.is()) {
+                approve = (xPackage->isBundle() &&
+                           xPackageType->getMediaType().match(
+                               "application/vnd.sun.star.legacy-package-bundle") );
+            }
+        }
+        abort = !approve;
+        if (abort) {
+            // notify cause as error:
+            request = wtExc.TargetException;
+        }
+        else {
+            // handable deployment error signalled, e.g.
+            // bundle item registration failed, notify as warning:
+            update_( wtExc.TargetException );
+        }
+    }
+    else if (request >>= licExc)
+    {
+        if ( !m_option_suppress_license )
+            printLicense(licExc.ExtensionName, licExc.Text, approve, abort);
+        else
+        {
+            approve = true;
+            abort = false;
+        }
+    }
+    else if (request >>= instExc)
+    {
+        //Only if the unopgk was started with gui + extension then the user is asked.
+        //In console mode there is no asking.
+        approve = true;
+    }
+    else if (request >>= platExc)
+    {
+        OUString sMsg(DpResId(RID_STR_UNSUPPORTED_PLATFORM));
+        sMsg = sMsg.replaceAll("%Name", platExc.package->getDisplayName());
+        dp_misc::writeConsole(OUStringConcatenation("\n" + sMsg + "\n\n"));
+        approve = true;
+    }
+    else {
+        deployment::VersionException nc_exc;
+        if (request >>= nc_exc) {
+            approve = m_option_force_overwrite ||
+                (::dp_misc::compareVersions(nc_exc.NewVersion, nc_exc.Deployed->getVersion())
+                 == ::dp_misc::GREATER);
+            abort = !approve;
+        }
+        else
+            return; // unknown request => no selection at all
+    }
+
+    if (abort && m_option_verbose)
+    {
+        OUString msg = ::comphelper::anyToString(request);
+        dp_misc::writeConsoleError(OUStringConcatenation("\nERROR: " + msg + "\n"));
+    }
+
+    // select:
+    const css::uno::Sequence<css::uno::Reference<css::task::XInteractionContinuation>> xIC = xRequest->getContinuations();
+    for ( auto const& rCont : xIC )
+    {
+        if (approve) {
+            Reference<task::XInteractionApprove> xInteractionApprove(
+                rCont, UNO_QUERY );
+            if (xInteractionApprove.is()) {
+                xInteractionApprove->select();
+                break;
+            }
+        }
+        else if (abort) {
+            Reference<task::XInteractionAbort> xInteractionAbort(
+                rCont, UNO_QUERY );
+            if (xInteractionAbort.is()) {
+                xInteractionAbort->select();
+                break;
+            }
+        }
+    }
+}
+
+// XProgressHandler
+
+void CommandEnvironmentImpl::push( Any const & Status )
+{
+    update_( Status );
+    OSL_ASSERT( m_logLevel >= 0 );
+    ++m_logLevel;
+    if (m_xLogFile.is())
+        m_xLogFile->push( Status );
+}
+
+
+void CommandEnvironmentImpl::update_( Any const & Status )
+{
+    if (! Status.hasValue())
+        return;
+    bool bUseErr = false;
+    OUString msg;
+    if (Status >>= msg) {
+        if (! m_option_verbose)
+            return;
+    }
+    else {
+        OUStringBuffer buf;
+        buf.append( "WARNING: " );
+        deployment::DeploymentException dp_exc;
+        if (Status >>= dp_exc) {
+            buf.append( dp_exc.Message );
+            buf.append( ", Cause: " );
+            buf.append( ::comphelper::anyToString(dp_exc.Cause) );
+        }
+        else {
+            buf.append( ::comphelper::anyToString(Status) );
+        }
+        msg = buf.makeStringAndClear();
+        bUseErr = true;
+    }
+    OSL_ASSERT( m_logLevel >= 0 );
+    for ( sal_Int32 n = 0; n < m_logLevel; ++n )
+    {
+        if (bUseErr)
+            dp_misc::writeConsoleError(u" ");
+        else
+            dp_misc::writeConsole(u" ");
+    }
+
+    if (bUseErr)
+        dp_misc::writeConsoleError(OUStringConcatenation(msg + "\n"));
+    else
+        dp_misc::writeConsole(OUStringConcatenation(msg + "\n"));
+}
+
+
+void CommandEnvironmentImpl::update( Any const & Status )
+{
+    update_( Status );
+    if (m_xLogFile.is())
+        m_xLogFile->update( Status );
+}
+
+
+void CommandEnvironmentImpl::pop()
+{
+    OSL_ASSERT( m_logLevel > 0 );
+    --m_logLevel;
+    if (m_xLogFile.is())
+        m_xLogFile->pop();
+}
+
+
+} // anon namespace
+
+namespace unopkg {
+
+
+Reference< XCommandEnvironment > createCmdEnv(
+    Reference< XComponentContext > const & xContext,
+    bool option_force_overwrite,
+    bool option_verbose,
+    bool option_suppress_license)
+{
+    return new CommandEnvironmentImpl(
+        xContext, option_force_overwrite, option_verbose, option_suppress_license);
+}
+} // unopkg
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/pkgchk/unopkg/unopkg_main.c b/desktop/source/pkgchk/unopkg/unopkg_main.c
new file mode 100644
index 000000000..83b20b0b4
--- /dev/null
+++ b/desktop/source/pkgchk/unopkg/unopkg_main.c
@@ -0,0 +1,26 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/main.h>
+
+#include "unopkg_main.h"
+
+SAL_IMPLEMENT_MAIN() { return unopkg_main(); }
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/pkgchk/unopkg/unopkg_main.h b/desktop/source/pkgchk/unopkg/unopkg_main.h
new file mode 100644
index 000000000..0fcb1013d
--- /dev/null
+++ b/desktop/source/pkgchk/unopkg/unopkg_main.h
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <desktop/dllapi.h>
+
+#if defined __cplusplus
+extern "C" {
+#endif
+
+DESKTOP_DLLPUBLIC int unopkg_main(void);
+
+#if defined __cplusplus
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/pkgchk/unopkg/unopkg_misc.cxx b/desktop/source/pkgchk/unopkg/unopkg_misc.cxx
new file mode 100644
index 000000000..402833aa5
--- /dev/null
+++ b/desktop/source/pkgchk/unopkg/unopkg_misc.cxx
@@ -0,0 +1,458 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <config_folders.h>
+
+#include <vcl/svapp.hxx>
+#include <vcl/weld.hxx>
+#include <rtl/bootstrap.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <sal/log.hxx>
+#include <osl/process.h>
+#include <osl/file.hxx>
+#include <unotools/configmgr.hxx>
+#include <unotools/bootstrap.hxx>
+#include <cppuhelper/bootstrap.hxx>
+#include <comphelper/sequence.hxx>
+#include <comphelper/processfactory.hxx>
+
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/ucb/UniversalContentBroker.hpp>
+
+#include <strings.hrc>
+#include "unopkg_shared.h"
+#include <dp_identifier.hxx>
+#include <dp_misc.h>
+#include <dp_shared.hxx>
+#include <lockfile.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace unopkg {
+
+OUString toString( OptionInfo const * info )
+{
+    assert(info != nullptr);
+    OUStringBuffer buf;
+    buf.append("--");
+    buf.appendAscii(info->m_name);
+    if (info->m_short_option != '\0')
+    {
+        buf.append(" (short -" );
+        buf.append(info->m_short_option );
+        buf.append(")");
+    }
+    if (info->m_has_argument)
+        buf.append(" <argument>" );
+    return buf.makeStringAndClear();
+}
+
+
+OptionInfo const * getOptionInfo(
+    OptionInfo const * list,
+    OUString const & opt )
+{
+    for ( ; list->m_name != nullptr; ++list )
+    {
+        OptionInfo const & option_info = *list;
+        if (!opt.isEmpty())
+        {
+            if (opt.equalsAsciiL(
+                    option_info.m_name, option_info.m_name_length ))
+            {
+                return &option_info;
+            }
+        }
+    }
+    SAL_WARN( "desktop", opt );
+    return nullptr;
+}
+
+
+bool isOption( OptionInfo const * option_info, sal_uInt32 * pIndex )
+{
+    assert(option_info != nullptr);
+    if (osl_getCommandArgCount() <= *pIndex)
+        return false;
+
+    OUString arg;
+    osl_getCommandArg( *pIndex, &arg.pData );
+    sal_Int32 len = arg.getLength();
+
+    if (len < 2 || arg[ 0 ] != '-')
+        return false;
+
+    if (len == 2 && arg[ 1 ] == option_info->m_short_option)
+    {
+        ++(*pIndex);
+        dp_misc::TRACE(__FILE__ ": identified option \'\'"
+            + OUStringChar( option_info->m_short_option ) + "\n");
+        return true;
+    }
+    if (arg[ 1 ] == '-' && rtl_ustr_ascii_compare(
+            arg.pData->buffer + 2, option_info->m_name ) == 0)
+    {
+        ++(*pIndex);
+        dp_misc::TRACE(__FILE__ ": identified option \'"
+            + OUString::createFromAscii(option_info->m_name) + "\'\n");
+        return true;
+    }
+    return false;
+}
+
+
+bool isBootstrapVariable(sal_uInt32 * pIndex)
+{
+    OSL_ASSERT(osl_getCommandArgCount() >=  *pIndex);
+
+    OUString arg;
+    osl_getCommandArg(*pIndex, &arg.pData);
+    if (arg.match("-env:"))
+    {
+        ++(*pIndex);
+        return true;
+    }
+    return false;
+}
+
+
+bool readArgument(
+    OUString * pValue, OptionInfo const * option_info, sal_uInt32 * pIndex )
+{
+    if (isOption( option_info, pIndex ))
+    {
+        if (*pIndex < osl_getCommandArgCount())
+        {
+            OSL_ASSERT( pValue != nullptr );
+            osl_getCommandArg( *pIndex, &pValue->pData );
+            dp_misc::TRACE(__FILE__ ": argument value: "
+                + *pValue + "\n");
+            ++(*pIndex);
+            return true;
+        }
+        --(*pIndex);
+    }
+    return false;
+}
+
+
+OUString const & getExecutableDir()
+{
+    static const OUString EXEC =
+        []()
+        {
+            OUString path;
+            if (osl_getExecutableFile( &path.pData ) != osl_Process_E_None) {
+                throw RuntimeException("cannot locate executable directory!",nullptr);
+            }
+            return path.copy( 0, path.lastIndexOf( '/' ) );
+        }();
+    return EXEC;
+}
+
+
+OUString const & getProcessWorkingDir()
+{
+    static const OUString WORKING =
+        []()
+        {
+            OUString workingDir;
+            utl::Bootstrap::getProcessWorkingDir(workingDir);
+            return workingDir;
+        }();
+    return WORKING;
+}
+
+
+OUString makeAbsoluteFileUrl(
+    OUString const & sys_path, OUString const & base_url )
+{
+    // system path to file url
+    OUString file_url;
+    oslFileError rc = osl_getFileURLFromSystemPath( sys_path.pData, &file_url.pData );
+    if ( rc != osl_File_E_None) {
+        OUString tempPath;
+        if ( osl_getSystemPathFromFileURL( sys_path.pData, &tempPath.pData) != osl_File_E_None )
+        {
+            throw RuntimeException("cannot get file url from system path: " +
+                sys_path );
+        }
+        file_url = sys_path;
+    }
+
+    OUString abs;
+    if (osl_getAbsoluteFileURL(
+            base_url.pData, file_url.pData, &abs.pData ) != osl_File_E_None)
+    {
+        throw RuntimeException(
+            "making absolute file url failed: \"" + base_url
+            + "\" (base-url) and \"" + file_url + "\" (file-url)!" );
+    }
+    return abs[ abs.getLength() -1 ] == '/'
+        ? abs.copy( 0, abs.getLength() -1 ) : abs;
+}
+
+
+namespace {
+
+
+void printf_space( sal_Int32 space )
+{
+    while (space--)
+        dp_misc::writeConsole(u"  ");
+}
+
+
+void printf_line(
+    std::u16string_view name, std::u16string_view value, sal_Int32 level )
+{
+    printf_space( level );
+    dp_misc::writeConsole(OUStringConcatenation(OUString::Concat(name) + ": " + value + "\n"));
+}
+
+
+void printf_package(
+    Reference<deployment::XPackage> const & xPackage,
+    Reference<XCommandEnvironment> const & xCmdEnv, sal_Int32 level )
+{
+    beans::Optional< OUString > id(
+        level == 0
+        ? beans::Optional< OUString >(
+            true, dp_misc::getIdentifier( xPackage ) )
+        : xPackage->getIdentifier() );
+    if (id.IsPresent)
+        printf_line( u"Identifier", id.Value, level );
+    OUString version(xPackage->getVersion());
+    if (!version.isEmpty())
+        printf_line( u"Version", version, level + 1 );
+    printf_line( u"URL", xPackage->getURL(), level + 1 );
+
+    beans::Optional< beans::Ambiguous<sal_Bool> > option(
+        xPackage->isRegistered( Reference<task::XAbortChannel>(), xCmdEnv ) );
+    OUString value;
+    if (option.IsPresent) {
+        beans::Ambiguous<sal_Bool> const & reg = option.Value;
+        if (reg.IsAmbiguous)
+            value = "unknown";
+        else
+            value = reg.Value ? std::u16string_view(u"yes") : std::u16string_view(u"no");
+    }
+    else
+        value = "n/a";
+    printf_line( u"is registered", value, level + 1 );
+
+    const Reference<deployment::XPackageTypeInfo> xPackageType(
+        xPackage->getPackageType() );
+    OSL_ASSERT( xPackageType.is() );
+    if (xPackageType.is()) {
+        printf_line( u"Media-Type", xPackageType->getMediaType(), level + 1 );
+    }
+    printf_line( u"Description", xPackage->getDescription(), level + 1 );
+    if (!xPackage->isBundle())
+        return;
+
+    Sequence< Reference<deployment::XPackage> > seq(
+        xPackage->getBundle( Reference<task::XAbortChannel>(), xCmdEnv ) );
+    printf_space( level + 1 );
+    dp_misc::writeConsole(u"bundled Packages: {\n");
+    std::vector<Reference<deployment::XPackage> >vec_bundle;
+    ::comphelper::sequenceToContainer(vec_bundle, seq);
+    printf_packages( vec_bundle, std::vector<bool>(vec_bundle.size()),
+                     xCmdEnv, level + 2 );
+    printf_space( level + 1 );
+    dp_misc::writeConsole(u"}\n");
+}
+
+} // anon namespace
+
+static void printf_unaccepted_licenses(
+    Reference<deployment::XPackage> const & ext)
+{
+        OUString id(
+            dp_misc::getIdentifier(ext) );
+        printf_line( u"Identifier", id, 0 );
+        printf_space(1);
+        dp_misc::writeConsole(u"License not accepted\n\n");
+}
+
+
+void printf_packages(
+    std::vector< Reference<deployment::XPackage> > const & allExtensions,
+    std::vector<bool> const & vecUnaccepted,
+    Reference<XCommandEnvironment> const & xCmdEnv, sal_Int32 level )
+{
+    OSL_ASSERT(allExtensions.size() == vecUnaccepted.size());
+
+    if (allExtensions.empty())
+    {
+        printf_space( level );
+        dp_misc::writeConsole(u"<none>\n");
+    }
+    else
+    {
+        int index = 0;
+        for (auto const& extension : allExtensions)
+        {
+            if (vecUnaccepted[index])
+                printf_unaccepted_licenses(extension);
+            else
+                printf_package( extension, xCmdEnv, level );
+            dp_misc::writeConsole(u"\n");
+            ++index;
+        }
+    }
+}
+
+
+namespace {
+
+
+Reference<XComponentContext> bootstrapStandAlone()
+{
+    Reference<XComponentContext> xContext =
+        ::cppu::defaultBootstrap_InitialComponentContext();
+
+    Reference<lang::XMultiServiceFactory> xServiceManager(
+        xContext->getServiceManager(), UNO_QUERY_THROW );
+    // set global process service factory used by unotools config helpers
+    ::comphelper::setProcessServiceFactory( xServiceManager );
+
+    // Initialize the UCB (for backwards compatibility, in case some code still
+    // uses plain createInstance w/o args directly to obtain an instance):
+    UniversalContentBroker::create( xContext );
+
+    return xContext;
+}
+
+
+Reference<XComponentContext> connectToOffice(
+    Reference<XComponentContext> const & xLocalComponentContext,
+    bool verbose )
+{
+    OUString pipeId( ::dp_misc::generateRandomPipeId() );
+    OUString acceptArg = "--accept=pipe,name=" + pipeId + ";urp;";
+
+    Sequence<OUString> args { "--nologo", "--nodefault", acceptArg };
+    OUString appURL( getExecutableDir() + "/soffice" );
+
+    if (verbose)
+    {
+        dp_misc::writeConsole(OUStringConcatenation(
+            "Raising process: " + appURL +
+            "\nArguments: --nologo --nodefault " + args[2] +
+            "\n"));
+    }
+
+    ::dp_misc::raiseProcess( appURL, args );
+
+    if (verbose)
+        dp_misc::writeConsole(u"OK.  Connecting...");
+
+    OUString sUnoUrl = "uno:pipe,name=" + pipeId + ";urp;StarOffice.ComponentContext";
+    Reference<XComponentContext> xRet(
+        ::dp_misc::resolveUnoURL(
+            sUnoUrl, xLocalComponentContext ),
+        UNO_QUERY_THROW );
+    if (verbose)
+        dp_misc::writeConsole(u"OK.\n");
+
+    return xRet;
+}
+
+} // anon namespace
+
+/** returns the path to the lock file used by unopkg.
+    @return the path. An empty string signifies an error.
+*/
+static OUString getLockFilePath()
+{
+    OUString ret;
+    OUString sBootstrap("${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("bootstrap") ":UserInstallation}");
+    rtl::Bootstrap::expandMacros(sBootstrap);
+    OUString sAbs;
+    if (::osl::File::E_None ==  ::osl::File::getAbsoluteFileURL(
+        sBootstrap, ".lock", sAbs))
+    {
+        if (::osl::File::E_None ==
+            ::osl::File::getSystemPathFromFileURL(sAbs, sBootstrap))
+        {
+            ret = sBootstrap;
+        }
+    }
+
+    return ret;
+}
+
+Reference<XComponentContext> getUNO(
+    bool verbose, bool bGui, const OUString& sTempDir,
+    Reference<XComponentContext> & out_localContext)
+{
+    // do not create any user data (for the root user) in --shared mode:
+    if (!sTempDir.isEmpty())
+        rtl::Bootstrap::set("UserInstallation", sTempDir);
+
+    // hold lock during process runtime:
+    static ::desktop::Lockfile s_lockfile( false /* no IPC server */ );
+    Reference<XComponentContext> xComponentContext( bootstrapStandAlone() );
+    out_localContext = xComponentContext;
+    if (::dp_misc::office_is_running()) {
+        xComponentContext.set(
+            connectToOffice( xComponentContext, verbose ) );
+    }
+    else
+    {
+        if (! s_lockfile.check( nullptr ))
+        {
+            OUString sMsg(DpResId(RID_STR_CONCURRENTINSTANCE));
+            OUString sError(DpResId(RID_STR_UNOPKG_ERROR));
+
+            sMsg += "\n" + getLockFilePath();
+
+            if (bGui)
+            {
+                //We show a message box or print to the console that there
+                //is another instance already running
+                if ( ! InitVCL() )
+                    throw RuntimeException( "Cannot initialize VCL!" );
+                {
+                    std::unique_ptr<weld::MessageDialog> xWarn(Application::CreateMessageDialog(nullptr,
+                                                               VclMessageType::Warning, VclButtonsType::Ok,
+                                                               sMsg));
+                    xWarn->set_title(utl::ConfigManager::getProductName());
+                    xWarn->run();
+                }
+                DeInitVCL();
+            }
+
+            throw LockFileException(sError + sMsg);
+        }
+    }
+
+    return xComponentContext;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/pkgchk/unopkg/unopkg_shared.h b/desktop/source/pkgchk/unopkg/unopkg_shared.h
new file mode 100644
index 000000000..21d0f6a92
--- /dev/null
+++ b/desktop/source/pkgchk/unopkg/unopkg_shared.h
@@ -0,0 +1,119 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <osl/diagnose.h>
+#include <rtl/ustring.hxx>
+
+#include <utility>
+#include <vector>
+
+#define APP_NAME "unopkg"
+
+namespace unopkg {
+
+struct OptionInfo
+{
+    char const * m_name;
+    sal_uInt32 m_name_length;
+    sal_Unicode m_short_option;
+    bool m_has_argument;
+};
+
+struct LockFileException
+{
+    explicit LockFileException(OUString sMessage) :
+        Message(std::move(sMessage)) {}
+
+    OUString Message;
+};
+
+
+OUString toString( OptionInfo const * info );
+
+
+OptionInfo const * getOptionInfo(
+    OptionInfo const * list,
+    OUString const & opt );
+
+
+bool isOption( OptionInfo const * option_info, sal_uInt32 * pIndex );
+
+
+bool readArgument(
+    OUString * pValue, OptionInfo const * option_info,
+    sal_uInt32 * pIndex );
+
+
+inline bool readOption(
+    bool * flag, OptionInfo const * option_info, sal_uInt32 * pIndex )
+{
+    if (isOption( option_info, pIndex )) {
+        OSL_ASSERT( flag != nullptr );
+        *flag = true;
+        return true;
+    }
+    return false;
+}
+
+
+/** checks if an argument is a bootstrap variable. These start with -env:. For example
+    -env:UNO_JAVA_JFW_USER_DATA=file:///d:/user
+*/
+bool isBootstrapVariable(sal_uInt32 * pIndex);
+
+OUString const & getExecutableDir();
+
+
+OUString const & getProcessWorkingDir();
+
+
+OUString makeAbsoluteFileUrl(
+    OUString const & sys_path, OUString const & base_url );
+
+
+
+
+css::uno::Reference<css::ucb::XCommandEnvironment> createCmdEnv(
+    css::uno::Reference<css::uno::XComponentContext> const & xContext,
+    bool option_force_overwrite,
+    bool option_verbose,
+    bool option_suppressLicense);
+
+void printf_packages(
+    std::vector<
+    css::uno::Reference<css::deployment::XPackage> > const & allExtensions,
+    std::vector<bool> const & vecUnaccepted,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+    sal_Int32 level = 0 );
+
+
+
+
+css::uno::Reference<css::uno::XComponentContext> getUNO(
+    bool verbose, bool bGui, const OUString& sTempDir,
+    css::uno::Reference<css::uno::XComponentContext> & out_LocalComponentContext);
+
+}
+
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/splash/spl.component b/desktop/source/splash/spl.component
new file mode 100644
index 000000000..a15cbdf54
--- /dev/null
+++ b/desktop/source/splash/spl.component
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.office.comp.SplashScreen"
+    constructor="desktop_SplashScreen_get_implementation">
+    <service name="com.sun.star.office.SplashScreen"/>
+  </implementation>
+  <implementation name="com.sun.star.office.comp.PipeSplashScreen"
+    constructor="desktop_UnxSplash_get_implementation" single-instance="true">
+    <service name="com.sun.star.office.PipeSplashScreen"/>
+  </implementation>
+</component>
diff --git a/desktop/source/splash/splash.cxx b/desktop/source/splash/splash.cxx
new file mode 100644
index 000000000..fb6b0bfcb
--- /dev/null
+++ b/desktop/source/splash/splash.cxx
@@ -0,0 +1,632 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <sal/log.hxx>
+#include <vcl/bitmapex.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/salnativewidgets.hxx>
+
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/task/XStatusIndicator.hpp>
+#include <comphelper/string.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <rtl/bootstrap.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/math.hxx>
+#include <vcl/introwin.hxx>
+#include <vcl/virdev.hxx>
+#include <o3tl/string_view.hxx>
+
+#include <mutex>
+
+#define NOT_LOADED  (tools::Long(-1))
+#define NOT_LOADED_COLOR  (Color(ColorTransparency, 0xffffffff))
+
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::task;
+using namespace ::com::sun::star::uno;
+
+namespace {
+
+class SplashScreen;
+
+class SplashScreenWindow : public IntroWindow
+{
+public:
+    SplashScreen *pSpl;
+    ScopedVclPtr<VirtualDevice> _vdev;
+    explicit SplashScreenWindow(SplashScreen *);
+    virtual ~SplashScreenWindow() override { disposeOnce(); }
+    virtual void dispose() override;
+    // workwindow
+    virtual void Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle&) override;
+    void Redraw();
+
+};
+
+class  SplashScreen
+    : public ::cppu::WeakImplHelper< XStatusIndicator, XInitialization, XServiceInfo >
+{
+    friend class SplashScreenWindow;
+private:
+    VclPtr<SplashScreenWindow> pWindow;
+
+    DECL_LINK( AppEventListenerHdl, VclSimpleEvent&, void );
+    virtual ~SplashScreen() override;
+    void loadConfig();
+    void updateStatus();
+    void SetScreenBitmap(BitmapEx &rBitmap);
+    static void determineProgressRatioValues( double& rXRelPos, double& rYRelPos, double& rRelWidth, double& rRelHeight );
+
+    BitmapEx        _aIntroBmp;
+    Color           _cProgressFrameColor;
+    Color           _cProgressBarColor;
+    Color           _cProgressTextColor;
+    bool            _bNativeProgress;
+    OUString        _sAppName;
+    OUString        _sProgressText;
+
+    sal_Int32   _iMax;
+    sal_Int32   _iProgress;
+    bool        _bPaintProgress;
+    bool        _bVisible;
+    bool        _bShowLogo;
+    bool        _bFullScreenSplash;
+    bool        _bProgressEnd;
+    tools::Long        _height, _width, _tlx, _tly, _barwidth;
+    tools::Long        _barheight, _barspace, _textBaseline;
+    double      _fXPos, _fYPos;
+    double      _fWidth, _fHeight;
+    static constexpr tools::Long  _xoffset = 12, _yoffset = 18;
+
+public:
+    SplashScreen();
+
+    // XStatusIndicator
+    virtual void SAL_CALL end() override;
+    virtual void SAL_CALL reset() override;
+    virtual void SAL_CALL setText(const OUString& aText) override;
+    virtual void SAL_CALL setValue(sal_Int32 nValue) override;
+    virtual void SAL_CALL start(const OUString& aText, sal_Int32 nRange) override;
+
+    // XInitialize
+    virtual void SAL_CALL initialize( const css::uno::Sequence< css::uno::Any>& aArguments ) override;
+
+    virtual OUString SAL_CALL getImplementationName() override
+    { return "com.sun.star.office.comp.SplashScreen"; }
+
+    virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName) override
+    { return cppu::supportsService(this, ServiceName); }
+
+    virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override
+    { return { "com.sun.star.office.SplashScreen" }; }
+};
+
+SplashScreenWindow::SplashScreenWindow(SplashScreen *pSplash)
+    : pSpl( pSplash )
+    , _vdev(VclPtr<VirtualDevice>::Create(*GetOutDev()))
+{
+    _vdev->EnableRTL(IsRTLEnabled());
+}
+
+void SplashScreenWindow::dispose()
+{
+    pSpl = nullptr;
+    IntroWindow::dispose();
+}
+
+void SplashScreenWindow::Redraw()
+{
+    Invalidate();
+    // Trigger direct painting too - otherwise the splash screen won't be
+    // shown in some cases (when the idle timer won't be hit).
+    Paint(*GetOutDev(), tools::Rectangle());
+    GetOutDev()->Flush();
+}
+
+SplashScreen::SplashScreen()
+    : pWindow( VclPtr<SplashScreenWindow>::Create(this) )
+    , _cProgressFrameColor(NOT_LOADED_COLOR)
+    , _cProgressBarColor(NOT_LOADED_COLOR)
+    , _cProgressTextColor(NOT_LOADED_COLOR)
+    , _bNativeProgress(true)
+    , _iMax(100)
+    , _iProgress(0)
+    , _bPaintProgress(false)
+    , _bVisible(true)
+    , _bShowLogo(true)
+    , _bFullScreenSplash(false)
+    , _bProgressEnd(false)
+    , _height(0)
+    , _width(0)
+    , _tlx(NOT_LOADED)
+    , _tly(NOT_LOADED)
+    , _barwidth(NOT_LOADED)
+    , _barheight(NOT_LOADED)
+    , _barspace(2)
+    , _textBaseline(NOT_LOADED)
+    , _fXPos(-1.0)
+    , _fYPos(-1.0)
+    , _fWidth(-1.0)
+    , _fHeight(-1.0)
+{
+    loadConfig();
+}
+
+SplashScreen::~SplashScreen()
+{
+    Application::RemoveEventListener(
+        LINK( this, SplashScreen, AppEventListenerHdl ) );
+    pWindow->Hide();
+    pWindow.disposeAndClear();
+}
+
+void SAL_CALL SplashScreen::start(const OUString&, sal_Int32 nRange)
+{
+    _iMax = nRange;
+    if (_bVisible) {
+        _bProgressEnd = false;
+        SolarMutexGuard aSolarGuard;
+        pWindow->Show();
+        pWindow->Redraw();
+    }
+}
+
+void SAL_CALL SplashScreen::end()
+{
+    _iProgress = _iMax;
+    if (_bVisible )
+    {
+        pWindow->Hide();
+    }
+    _bProgressEnd = true;
+}
+
+void SAL_CALL SplashScreen::reset()
+{
+    _iProgress = 0;
+    if (_bVisible && !_bProgressEnd )
+    {
+        pWindow->Show();
+        updateStatus();
+    }
+}
+
+void SAL_CALL SplashScreen::setText(const OUString& rText)
+{
+    SolarMutexGuard aSolarGuard;
+    if ( _sProgressText != rText )
+    {
+        _sProgressText = rText;
+
+        if (_bVisible && !_bProgressEnd)
+        {
+            pWindow->Show();
+            updateStatus();
+        }
+    }
+}
+
+void SAL_CALL SplashScreen::setValue(sal_Int32 nValue)
+{
+    SAL_INFO( "desktop.splash", "setValue: " << nValue );
+
+    SolarMutexGuard aSolarGuard;
+    if (_bVisible && !_bProgressEnd) {
+        pWindow->Show();
+        if (nValue >= _iMax)
+            _iProgress = _iMax;
+        else
+            _iProgress = nValue;
+        updateStatus();
+    }
+}
+
+// XInitialize
+void SAL_CALL
+SplashScreen::initialize( const css::uno::Sequence< css::uno::Any>& aArguments )
+{
+    static std::mutex aMutex;
+    std::lock_guard  aGuard( aMutex );
+    if (!aArguments.hasElements())
+        return;
+
+    aArguments[0] >>= _bVisible;
+    if (aArguments.getLength() > 1 )
+        aArguments[1] >>= _sAppName;
+
+    // start to determine bitmap and all other required value
+    if ( _bShowLogo )
+        SetScreenBitmap (_aIntroBmp);
+    Size aSize = _aIntroBmp.GetSizePixel();
+    pWindow->SetOutputSizePixel( aSize );
+    pWindow->_vdev->SetOutputSizePixel( aSize );
+    _height = aSize.Height();
+    _width = aSize.Width();
+    if (_width > 500)
+    {
+        Point xtopleft(212,216);
+        if ( NOT_LOADED == _tlx || NOT_LOADED == _tly )
+        {
+            _tlx = xtopleft.X();    // top-left x
+            _tly = xtopleft.Y();    // top-left y
+        }
+        if ( NOT_LOADED == _barwidth )
+            _barwidth = 263;
+        if ( NOT_LOADED == _barheight )
+            _barheight = 8;
+    }
+    else
+    {
+        if ( NOT_LOADED == _barwidth )
+            _barwidth  = _width - (2 * _xoffset);
+        if ( NOT_LOADED == _barheight )
+            _barheight = 6;
+        if ( NOT_LOADED == _tlx || NOT_LOADED == _tly )
+        {
+            _tlx = _xoffset;           // top-left x
+            _tly = _height - _yoffset; // top-left y
+        }
+    }
+
+    if ( NOT_LOADED == _textBaseline )
+        _textBaseline = _height;
+
+    if ( NOT_LOADED_COLOR == _cProgressFrameColor )
+        _cProgressFrameColor = COL_LIGHTGRAY;
+
+    if ( NOT_LOADED_COLOR == _cProgressBarColor )
+    {
+        // progress bar: new color only for big bitmap format
+        if ( _width > 500 )
+            _cProgressBarColor = Color( 157, 202, 18 );
+        else
+            _cProgressBarColor = COL_BLUE;
+    }
+
+    if ( NOT_LOADED_COLOR == _cProgressTextColor )
+        _cProgressTextColor = COL_BLACK;
+
+    Application::AddEventListener(
+        LINK( this, SplashScreen, AppEventListenerHdl ) );
+}
+
+void SplashScreen::updateStatus()
+{
+    if (!_bVisible || _bProgressEnd)
+        return;
+    if (!_bPaintProgress)
+        _bPaintProgress = true;
+    pWindow->Redraw();
+}
+
+// internal private methods
+IMPL_LINK( SplashScreen, AppEventListenerHdl, VclSimpleEvent&, inEvent, void )
+{
+    if (static_cast<VclWindowEvent&>(inEvent).GetWindow() == pWindow)
+    {
+        switch ( inEvent.GetId() )
+        {
+            case VclEventId::WindowShow:
+                pWindow->Redraw();
+                break;
+            default:
+                break;
+        }
+    }
+}
+
+// Read keys from soffice{.ini|rc}:
+OUString implReadBootstrapKey( const OUString& _rKey )
+{
+    OUString sValue;
+    rtl::Bootstrap::get(_rKey, sValue);
+    return sValue;
+}
+
+void SplashScreen::loadConfig()
+{
+    _bShowLogo = implReadBootstrapKey( "Logo" ) != "0";
+
+    OUString sProgressFrameColor = implReadBootstrapKey( "ProgressFrameColor" );
+    OUString sProgressBarColor = implReadBootstrapKey( "ProgressBarColor" );
+    OUString sProgressTextColor = implReadBootstrapKey( "ProgressTextColor" );
+    OUString sProgressTextBaseline = implReadBootstrapKey( "ProgressTextBaseline" );
+    OUString sSize = implReadBootstrapKey( "ProgressSize" );
+    OUString sPosition = implReadBootstrapKey( "ProgressPosition" );
+    OUString sFullScreenSplash = implReadBootstrapKey( "FullScreenSplash" );
+    OUString sNativeProgress = implReadBootstrapKey( "NativeProgress" );
+
+
+    // Determine full screen splash mode
+    _bFullScreenSplash = (( !sFullScreenSplash.isEmpty() ) &&
+                          ( sFullScreenSplash != "0" ));
+
+    // Try to retrieve the relative values for the progress bar. The current
+    // schema uses the screen ratio to retrieve the associated values.
+    if ( _bFullScreenSplash )
+        determineProgressRatioValues( _fXPos, _fYPos, _fWidth, _fHeight );
+
+    if ( !sProgressFrameColor.isEmpty() )
+    {
+        sal_uInt8 nRed = 0;
+        sal_Int32 idx = 0;
+        sal_Int32 temp = o3tl::toInt32(o3tl::getToken(sProgressFrameColor, 0, ',', idx ));
+        if ( idx != -1 )
+        {
+            nRed = static_cast< sal_uInt8 >( temp );
+            temp = o3tl::toInt32(o3tl::getToken(sProgressFrameColor, 0, ',', idx ));
+        }
+        if ( idx != -1 )
+        {
+            sal_uInt8 nGreen = static_cast< sal_uInt8 >( temp );
+            sal_uInt8 nBlue = static_cast< sal_uInt8 >( o3tl::toInt32(o3tl::getToken(sProgressFrameColor, 0, ',', idx )) );
+            _cProgressFrameColor = Color( nRed, nGreen, nBlue );
+        }
+    }
+
+    if ( !sProgressBarColor.isEmpty() )
+    {
+        sal_uInt8 nRed = 0;
+        sal_Int32 idx = 0;
+        sal_Int32 temp = o3tl::toInt32(o3tl::getToken(sProgressBarColor, 0, ',', idx ));
+        if ( idx != -1 )
+        {
+            nRed = static_cast< sal_uInt8 >( temp );
+            temp = o3tl::toInt32(o3tl::getToken(sProgressBarColor, 0, ',', idx ));
+        }
+        if ( idx != -1 )
+        {
+            sal_uInt8 nGreen = static_cast< sal_uInt8 >( temp );
+            sal_uInt8 nBlue = static_cast< sal_uInt8 >( o3tl::toInt32(o3tl::getToken(sProgressBarColor, 0, ',', idx )) );
+            _cProgressBarColor = Color( nRed, nGreen, nBlue );
+        }
+    }
+
+    if ( !sProgressTextColor.isEmpty() )
+    {
+        sal_uInt8 nRed = 0;
+        sal_Int32 idx = 0;
+        sal_Int32 temp = o3tl::toInt32(o3tl::getToken(sProgressTextColor, 0, ',', idx ));
+        if ( idx != -1 )
+        {
+            nRed = static_cast< sal_uInt8 >( temp );
+            temp = o3tl::toInt32(o3tl::getToken(sProgressTextColor, 0, ',', idx ));
+        }
+        if ( idx != -1 )
+        {
+            sal_uInt8 nGreen = static_cast< sal_uInt8 >( temp );
+            sal_uInt8 nBlue = static_cast< sal_uInt8 >( o3tl::toInt32(o3tl::getToken(sProgressTextColor, 0, ',', idx )) );
+            _cProgressTextColor = Color( nRed, nGreen, nBlue );
+        }
+    }
+
+    if ( !sProgressTextBaseline.isEmpty() )
+    {
+        _textBaseline = sProgressTextBaseline.toInt32();
+    }
+
+    if( !sNativeProgress.isEmpty() )
+    {
+        _bNativeProgress = sNativeProgress.toBoolean();
+    }
+
+    if ( !sSize.isEmpty() )
+    {
+        sal_Int32 idx = 0;
+        sal_Int32 temp = o3tl::toInt32(o3tl::getToken(sSize, 0, ',', idx ));
+        if ( idx != -1 )
+        {
+            _barwidth = temp;
+            _barheight = o3tl::toInt32(o3tl::getToken(sSize, 0, ',', idx ));
+        }
+    }
+
+    if ( _barheight >= 10 )
+        _barspace = 3;  // more space between frame and bar
+
+    if ( !sPosition.isEmpty() )
+    {
+        sal_Int32 idx = 0;
+        sal_Int32 temp = o3tl::toInt32(o3tl::getToken(sPosition, 0, ',', idx ));
+        if ( idx != -1 )
+        {
+            _tlx = temp;
+            _tly = o3tl::toInt32(o3tl::getToken(sPosition, 0, ',', idx ));
+        }
+    }
+}
+
+void SplashScreen::SetScreenBitmap(BitmapEx &rBitmap)
+{
+    sal_Int32 nWidth( 0 );
+    sal_Int32 nHeight( 0 );
+
+    // determine desktop resolution
+    sal_uInt32 nCount = Application::GetScreenCount();
+    if ( nCount > 0 )
+    {
+        // retrieve size from first screen
+        tools::Rectangle aScreenArea = Application::GetScreenPosSizePixel(static_cast<unsigned int>(0));
+        nWidth  = aScreenArea.GetWidth();
+        nHeight = aScreenArea.GetHeight();
+    }
+
+    // create file name from screen resolution information
+    OStringBuffer aStrBuf( 128 );
+    aStrBuf.append( "intro_" );
+    if ( !_sAppName.isEmpty() )
+    {
+        aStrBuf.append( OUStringToOString(_sAppName, RTL_TEXTENCODING_UTF8) );
+        aStrBuf.append( "_" );
+    }
+    OString aResBuf = OString::number( nWidth ) + "x" + OString::number( nHeight );
+
+    aStrBuf.append( aResBuf.getStr() );
+    if (Application::LoadBrandBitmap (aStrBuf.makeStringAndClear().getStr(), rBitmap))
+        return;
+
+    aStrBuf.append( "intro_" );
+    aStrBuf.append( aResBuf.getStr() );
+    if (Application::LoadBrandBitmap (aResBuf.getStr(), rBitmap))
+        return;
+
+    (void)Application::LoadBrandBitmap ("intro", rBitmap);
+}
+
+void SplashScreen::determineProgressRatioValues(
+    double& rXRelPos, double& rYRelPos,
+    double& rRelWidth, double& rRelHeight )
+{
+    sal_Int32 nScreenRatio( 0 );
+
+    // determine desktop resolution
+    sal_uInt32 nCount = Application::GetScreenCount();
+    if ( nCount > 0 )
+    {
+        // retrieve size from first screen
+        tools::Rectangle aScreenArea = Application::GetScreenPosSizePixel(static_cast<unsigned int>(0));
+        sal_Int32 nWidth  = aScreenArea.GetWidth();
+        sal_Int32 nHeight = aScreenArea.GetHeight();
+        nScreenRatio  = nHeight ? sal_Int32( rtl::math::round( double( nWidth ) / double( nHeight ), 2 ) * 100 ) :  0;
+    }
+
+    char szFullScreenProgressRatio[] = "FullScreenProgressRatio0";
+    char szFullScreenProgressPos[]   = "FullScreenProgressPos0";
+    char szFullScreenProgressSize[]  = "FullScreenProgressSize0";
+    for ( sal_Int32 i = 0; i <= 9; i++ )
+    {
+        char cNum = '0' + char( i );
+        szFullScreenProgressRatio[23] = cNum;
+        szFullScreenProgressPos[21]   = cNum;
+        szFullScreenProgressSize[22]  = cNum;
+
+        OUString sFullScreenProgressRatio = implReadBootstrapKey(
+            OUString::createFromAscii( szFullScreenProgressRatio ) );
+
+        if ( !sFullScreenProgressRatio.isEmpty() )
+        {
+            double fRatio = sFullScreenProgressRatio.toDouble();
+            sal_Int32 nRatio = sal_Int32( rtl::math::round( fRatio, 2 ) * 100 );
+            if ( nRatio == nScreenRatio )
+            {
+                OUString sFullScreenProgressPos = implReadBootstrapKey(
+                    OUString::createFromAscii( szFullScreenProgressPos ) );
+                OUString sFullScreenProgressSize = implReadBootstrapKey(
+                    OUString::createFromAscii( szFullScreenProgressSize ) );
+
+                if ( !sFullScreenProgressPos.isEmpty() )
+                {
+                    sal_Int32 idx = 0;
+                    double temp = o3tl::toDouble(o3tl::getToken(sFullScreenProgressPos, 0, ',', idx ));
+                    if ( idx != -1 )
+                    {
+                        rXRelPos = temp;
+                        rYRelPos = o3tl::toDouble(o3tl::getToken(sFullScreenProgressPos, 0, ',', idx ));
+                    }
+                }
+
+                if ( !sFullScreenProgressSize.isEmpty() )
+                {
+                    sal_Int32 idx = 0;
+                    double temp = o3tl::toDouble(o3tl::getToken(sFullScreenProgressSize, 0, ',', idx ));
+                    if ( idx != -1 )
+                    {
+                        rRelWidth  = temp;
+                        rRelHeight = o3tl::toDouble(o3tl::getToken(sFullScreenProgressSize, 0, ',', idx ));
+                    }
+                }
+            }
+        }
+        else
+            break;
+    }
+}
+
+void SplashScreenWindow::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle&)
+{
+    if (!pSpl || !pSpl->_bVisible)
+        return;
+
+    //native drawing
+    // in case of native controls we need to draw directly to the window
+    if (pSpl->_bNativeProgress && rRenderContext.IsNativeControlSupported(ControlType::IntroProgress, ControlPart::Entire))
+    {
+        rRenderContext.DrawBitmapEx(Point(), pSpl->_aIntroBmp);
+
+        ImplControlValue aValue( pSpl->_iProgress * pSpl->_barwidth / pSpl->_iMax);
+        tools::Rectangle aDrawRect( Point(pSpl->_tlx, pSpl->_tly), Size( pSpl->_barwidth, pSpl->_barheight));
+        tools::Rectangle aNativeControlRegion, aNativeContentRegion;
+
+        if (rRenderContext.GetNativeControlRegion(ControlType::IntroProgress, ControlPart::Entire, aDrawRect,
+                                                  ControlState::ENABLED, aValue,
+                                                  aNativeControlRegion, aNativeContentRegion))
+        {
+              tools::Long nProgressHeight = aNativeControlRegion.GetHeight();
+              aDrawRect.AdjustTop( -((nProgressHeight - pSpl->_barheight)/2) );
+              aDrawRect.AdjustBottom((nProgressHeight - pSpl->_barheight)/2 );
+        }
+
+        if (rRenderContext.DrawNativeControl(ControlType::IntroProgress, ControlPart::Entire, aDrawRect,
+                                             ControlState::ENABLED, aValue, pSpl->_sProgressText))
+        {
+            return;
+        }
+    }
+
+    // non native drawing
+    // draw bitmap
+    _vdev->DrawBitmapEx(Point(), pSpl->_aIntroBmp);
+
+    if (pSpl->_bPaintProgress) {
+        // draw progress...
+        tools::Long length = (pSpl->_iProgress * pSpl->_barwidth / pSpl->_iMax) - (2 * pSpl->_barspace);
+        if (length < 0) length = 0;
+
+        // border
+        _vdev->SetFillColor();
+        _vdev->SetLineColor( pSpl->_cProgressFrameColor );
+        _vdev->DrawRect(tools::Rectangle(pSpl->_tlx, pSpl->_tly, pSpl->_tlx+pSpl->_barwidth, pSpl->_tly+pSpl->_barheight));
+        _vdev->SetFillColor( pSpl->_cProgressBarColor );
+        _vdev->SetLineColor();
+        _vdev->DrawRect(tools::Rectangle(pSpl->_tlx+pSpl->_barspace, pSpl->_tly+pSpl->_barspace, pSpl->_tlx+pSpl->_barspace+length, pSpl->_tly+pSpl->_barheight-pSpl->_barspace));
+        vcl::Font aFont;
+        aFont.SetFontSize(Size(0, 12));
+        aFont.SetAlignment(ALIGN_BASELINE);
+        _vdev->SetFont(aFont);
+        _vdev->SetTextColor(pSpl->_cProgressTextColor);
+        _vdev->DrawText(Point(pSpl->_tlx, pSpl->_textBaseline), pSpl->_sProgressText);
+    }
+    rRenderContext.DrawOutDev(Point(), GetOutputSizePixel(), Point(), _vdev->GetOutputSizePixel(), *_vdev);
+}
+
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_SplashScreen_get_implementation(
+    css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new SplashScreen());
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/splash/unxsplash.cxx b/desktop/source/splash/unxsplash.cxx
new file mode 100644
index 000000000..b218b7591
--- /dev/null
+++ b/desktop/source/splash/unxsplash.cxx
@@ -0,0 +1,128 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "unxsplash.hxx"
+#include <stdio.h>
+#include <osl/process.h>
+#include <cppuhelper/supportsservice.hxx>
+#include <sal/log.hxx>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+using namespace com::sun::star;
+
+namespace desktop
+{
+    UnxSplashScreen::UnxSplashScreen()
+    : m_pOutFd( nullptr )
+{
+}
+
+UnxSplashScreen::~UnxSplashScreen()
+{
+    SAL_INFO("desktop.splash", "UnxSplashScreen::~UnxSplashScreen()");
+    if ( m_pOutFd )
+    {
+        fclose( m_pOutFd );
+        m_pOutFd = nullptr;
+    }
+}
+
+void SAL_CALL UnxSplashScreen::start( const OUString& /*aText*/, sal_Int32 /*nRange*/ )
+{
+}
+
+void SAL_CALL UnxSplashScreen::end()
+{
+    SAL_INFO("desktop.splash", "UnxSplashScreen::end()");
+    if( !m_pOutFd )
+        return;
+
+    fprintf( m_pOutFd, "end\n" );
+    fflush( m_pOutFd );
+}
+
+void SAL_CALL UnxSplashScreen::reset()
+{
+    SAL_INFO("desktop.splash", "UNXSplashScreen::reset()");
+    if( !m_pOutFd )
+        return;
+
+    fprintf( m_pOutFd, "restart\n" );
+    fflush( m_pOutFd );
+}
+
+void SAL_CALL UnxSplashScreen::setText( const OUString& /*aText*/ )
+{
+    // TODO?
+}
+
+void SAL_CALL UnxSplashScreen::setValue( sal_Int32 nValue )
+{
+    if ( m_pOutFd )
+    {
+        fprintf( m_pOutFd, "%" SAL_PRIdINT32 "%%\n", nValue );
+        fflush( m_pOutFd );
+    }
+}
+
+// XInitialize
+void SAL_CALL
+UnxSplashScreen::initialize( const css::uno::Sequence< css::uno::Any>& )
+{
+    for ( sal_uInt32 i = 0; i < osl_getCommandArgCount(); i++ )
+    {
+        OUString aArg;
+        osl_getCommandArg( i, &aArg.pData );
+        OUString aNum;
+        if ( aArg.startsWithIgnoreAsciiCase("--splash-pipe=", &aNum) )
+        {
+            auto fd = aNum.toUInt32();
+            m_pOutFd = fdopen( fd, "w" );
+            SAL_INFO("desktop.splash", "Got argument '--splash-pipe=" << fd << " ('"
+                << aNum << "') ("
+                << static_cast<void *>(m_pOutFd) << ")");
+        }
+    }
+}
+
+OUString UnxSplashScreen::getImplementationName()
+{
+    return "com.sun.star.office.comp.PipeSplashScreen";
+}
+
+sal_Bool UnxSplashScreen::supportsService(OUString const & ServiceName)
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence<OUString> UnxSplashScreen::getSupportedServiceNames()
+{
+    return { "com.sun.star.office.PipeSplashScreen" };
+}
+
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_UnxSplash_get_implementation(
+    css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new desktop::UnxSplashScreen());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/splash/unxsplash.hxx b/desktop/source/splash/unxsplash.hxx
new file mode 100644
index 000000000..52b148abf
--- /dev/null
+++ b/desktop/source/splash/unxsplash.hxx
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <stdio.h>
+
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/task/XStatusIndicator.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <cppuhelper/implbase.hxx>
+
+namespace desktop {
+
+class  UnxSplashScreen : public ::cppu::WeakImplHelper< css::task::XStatusIndicator, css::lang::XInitialization, css::lang::XServiceInfo >
+{
+private:
+    UnxSplashScreen( const UnxSplashScreen& ) = delete;
+    UnxSplashScreen operator =( const UnxSplashScreen& ) = delete;
+
+    virtual ~UnxSplashScreen() override;
+
+    FILE *m_pOutFd;
+
+public:
+    explicit UnxSplashScreen();
+
+    // XStatusIndicator
+    virtual void SAL_CALL start( const OUString& aText, sal_Int32 nRange ) override;
+    virtual void SAL_CALL end() override;
+    virtual void SAL_CALL reset() override;
+    virtual void SAL_CALL setText( const OUString& aText ) override;
+    virtual void SAL_CALL setValue( sal_Int32 nValue ) override;
+
+    // XInitialize
+    virtual void SAL_CALL initialize( const css::uno::Sequence< css::uno::Any>& aArguments ) override;
+
+    virtual OUString SAL_CALL getImplementationName() override;
+
+    virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName) override;
+
+    virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */