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

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

25 files changed, 9423 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: */