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

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

91 files changed, 27092 insertions, 0 deletions

diff --git a/desktop/source/deployment/deployment.component b/desktop/source/deployment/deployment.component
new file mode 100644
index 000000000..f7a481bf4
--- /dev/null
+++ b/desktop/source/deployment/deployment.component
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.deployment.ExtensionManager"
+    constructor="com_sun_star_comp_deployment_ExtensionManager_get_implementation">
+    <service name="com.sun.star.comp.deployment.ExtensionManager"/>
+    <singleton name="com.sun.star.deployment.ExtensionManager"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.PackageInformationProvider"
+    constructor="com_sun_star_comp_deployment_PackageInformationProvider_get_implementation">
+    <service name="com.sun.star.comp.deployment.PackageInformationProvider"/>
+    <singleton name="com.sun.star.deployment.PackageInformationProvider"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.PackageManagerFactory"
+    constructor="com_sun_star_comp_deployment_PackageManagerFactory_get_implementation">
+    <service name="com.sun.star.comp.deployment.PackageManagerFactory"/>
+    <singleton name="com.sun.star.deployment.thePackageManagerFactory"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.ProgressLog"
+    constructor="com_sun_star_comp_deployment_ProgressLog_get_implementation">
+    <service name="com.sun.star.comp.deployment.ProgressLog"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.component.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_component_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.configuration.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_configuration_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.executable.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_executable_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.help.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_help_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.script.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_script_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.sfwk.PackageRegistryBackend"
+    constructor="com_sun_star_comp_deployment_sfwk_PackageRegistryBackend_get_implementation">
+    <service name="com.sun.star.deployment.PackageRegistryBackend"/>
+  </implementation>
+</component>
diff --git a/desktop/source/deployment/dp_log.cxx b/desktop/source/deployment/dp_log.cxx
new file mode 100644
index 000000000..9cdf8d071
--- /dev/null
+++ b/desktop/source/deployment/dp_log.cxx
@@ -0,0 +1,143 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <comphelper/anytostring.hxx>
+#include <comphelper/logging.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <com/sun/star/logging/LogLevel.hpp>
+#include <com/sun/star/ucb/XProgressHandler.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::logging;
+
+namespace dp_log {
+
+typedef ::cppu::WeakComponentImplHelper<ucb::XProgressHandler, lang::XServiceInfo> t_log_helper;
+
+namespace {
+
+class ProgressLogImpl : public cppu::BaseMutex, public t_log_helper
+{
+    std::unique_ptr<comphelper::EventLogger> m_logger;
+
+protected:
+    virtual void SAL_CALL disposing() override;
+    virtual ~ProgressLogImpl() override;
+
+public:
+    ProgressLogImpl( Sequence<Any> const & args,
+                     Reference<XComponentContext> const & xContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XProgressHandler
+    virtual void SAL_CALL push( Any const & Status ) override;
+    virtual void SAL_CALL update( Any const & Status ) override;
+    virtual void SAL_CALL pop() override;
+};
+
+}
+
+ProgressLogImpl::~ProgressLogImpl()
+{
+}
+
+
+void ProgressLogImpl::disposing()
+{
+}
+
+
+ProgressLogImpl::ProgressLogImpl(
+    Sequence<Any> const & /* args */,
+    Reference<XComponentContext> const & xContext )
+    : t_log_helper( m_aMutex )
+{
+    // Use the logger created by unopkg app
+    m_logger.reset(new comphelper::EventLogger(xContext, "unopkg"));
+}
+
+// XServiceInfo
+OUString ProgressLogImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.ProgressLog";
+}
+
+sal_Bool ProgressLogImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > ProgressLogImpl::getSupportedServiceNames()
+{
+    // a private one
+    return { "com.sun.star.comp.deployment.ProgressLog" };
+}
+
+// XProgressHandler
+
+void ProgressLogImpl::push( Any const & Status )
+{
+    update( Status );
+}
+
+void ProgressLogImpl::update( Any const & Status )
+{
+    if (! Status.hasValue())
+        return;
+
+    OUStringBuffer buf;
+
+    OUString msg;
+    sal_Int32 logLevel = LogLevel::INFO;
+    if (Status >>= msg) {
+        buf.append( msg );
+    }
+    else {
+        logLevel = LogLevel::SEVERE;
+        buf.append( ::comphelper::anyToString(Status) );
+    }
+    m_logger->log(logLevel, buf.makeStringAndClear());
+}
+
+
+void ProgressLogImpl::pop()
+{
+}
+
+} // namespace dp_log
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_ProgressLog_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_log::ProgressLogImpl(args, context));
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/dp_persmap.cxx b/desktop/source/deployment/dp_persmap.cxx
new file mode 100644
index 000000000..8b032fffb
--- /dev/null
+++ b/desktop/source/deployment/dp_persmap.cxx
@@ -0,0 +1,312 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cstddef>
+
+#include <dp_misc.h>
+#include <dp_persmap.h>
+#include <o3tl/safeint.hxx>
+#include <rtl/byteseq.hxx>
+#include <rtl/strbuf.hxx>
+#include <sal/log.hxx>
+
+using namespace ::rtl;
+
+// the persistent map is used to manage a handful of key-value string pairs
+// this implementation replaces a rather heavy-weight berkeleydb integration
+
+// the file backing up a persistent map consists of line pairs with
+// - a key string   (encoded with chars 0x00..0x0F being escaped)
+// - a value string (encoded with chars 0x00..0x0F being escaped)
+
+namespace dp_misc
+{
+
+const char PmapMagic[4] = {'P','m','p','1'};
+
+PersistentMap::PersistentMap( OUString const & url_ )
+:    m_MapFile( expandUnoRcUrl(url_) )
+,    m_bIsOpen( false )
+,    m_bToBeCreated( true )
+,    m_bIsDirty( false )
+{
+    open();
+}
+
+PersistentMap::PersistentMap()
+:    m_MapFile( OUString() )
+,    m_bIsOpen( false )
+,    m_bToBeCreated( false )
+,    m_bIsDirty( false )
+{}
+
+PersistentMap::~PersistentMap()
+{
+    if( m_bIsDirty )
+        flush();
+    if( m_bIsOpen )
+        m_MapFile.close();
+}
+
+
+// replace 0x00..0x0F with "%0".."%F"
+// replace "%" with "%%"
+static OString encodeString( const OString& rStr)
+{
+    const char* pChar = rStr.getStr();
+    const sal_Int32 nLen = rStr.getLength();
+    sal_Int32 i = nLen;
+    // short circuit for the simple non-encoded case
+    while( --i >= 0)
+    {
+        const unsigned char c = static_cast<unsigned char>(*(pChar++));
+        if( c <= 0x0F )
+            break;
+        if( c == '%')
+            break;
+    }
+    if( i < 0)
+        return rStr;
+
+    // escape chars 0x00..0x0F with "%0".."%F"
+    OStringBuffer aEncStr( nLen + 32);
+    aEncStr.append( pChar - (nLen-i), nLen - i);
+    while( --i >= 0)
+    {
+        unsigned char c = static_cast<unsigned char>(*(pChar++));
+        if( c <= 0x0F )
+        {
+            aEncStr.append( '%');
+            c += (c <= 0x09) ? '0' : 'A'-10;
+        } else if( c == '%')
+            aEncStr.append( '%');
+        aEncStr.append( char(c) );
+    }
+
+    return aEncStr.makeStringAndClear();
+}
+
+// replace "%0".."%F" with 0x00..0x0F
+// replace "%%" with "%"
+static OString decodeString( const char* pEncChars, int nLen)
+{
+    const char* pChar = pEncChars;
+    sal_Int32 i = nLen;
+    // short circuit for the simple non-encoded case
+    while( --i >= 0)
+        if( *(pChar++) == '%')
+            break;
+    if( i < 0)
+        return OString( pEncChars, nLen);
+
+    // replace escaped chars with their decoded counterparts
+    OStringBuffer aDecStr( nLen);
+    pChar = pEncChars;
+    for( i = nLen; --i >= 0;)
+    {
+        char c = *(pChar++);
+        // handle escaped character
+        if( c == '%')
+        {
+            --i;
+            OSL_ASSERT( i >= 0);
+            c = *(pChar++);
+            if( ('0' <= c) && (c <= '9'))
+                c -= '0';
+            else
+            {
+                OSL_ASSERT( ('A' <= c) && (c <= 'F'));
+                c -= ('A'-10);
+            }
+        }
+        aDecStr.append( c);
+    }
+
+    return aDecStr.makeStringAndClear();
+}
+
+void PersistentMap::open()
+{
+    // open the existing file
+    sal_uInt32 const nOpenFlags = osl_File_OpenFlag_Read | osl_File_OpenFlag_Write;
+
+    const osl::File::RC rcOpen = m_MapFile.open( nOpenFlags);
+    m_bIsOpen = (rcOpen == osl::File::E_None);
+
+    // or create later if needed
+    m_bToBeCreated &= (rcOpen == osl::File::E_NOENT) && !m_bIsOpen;
+
+    if( !m_bIsOpen)
+        return;
+
+    readAll();
+}
+
+
+void PersistentMap::readAll()
+{
+    // prepare for re-reading the map-file
+    m_entries.clear();
+    const osl::FileBase::RC nRes = m_MapFile.setPos( osl_Pos_Absolut, 0);
+    if (nRes != osl::FileBase::E_None)
+    {
+        SAL_WARN("desktop.deployment", "setPos failed with " << +nRes);
+        return;
+    }
+
+    // read header and check magic
+    char aHeaderBytes[ sizeof(PmapMagic)];
+    sal_uInt64 nBytesRead = 0;
+    m_MapFile.read( aHeaderBytes, sizeof(aHeaderBytes), nBytesRead);
+    OSL_ASSERT( nBytesRead == sizeof(aHeaderBytes));
+    if( nBytesRead != sizeof(aHeaderBytes))
+        return;
+    // check header magic
+    for( std::size_t i = 0; i < sizeof(PmapMagic); ++i)
+        if( aHeaderBytes[i] != PmapMagic[i])
+            return;
+
+    // read key value pairs and add them to the map
+    ByteSequence aKeyLine;
+    ByteSequence aValLine;
+    for(;;)
+    {
+        // read key-value line pair
+        // an empty key name indicates the end of the line pairs
+        if( m_MapFile.readLine( aKeyLine) != osl::File::E_None)
+            return;
+        if( !aKeyLine.getLength())
+            break;
+        if( m_MapFile.readLine( aValLine) != osl::File::E_None)
+            return;
+        // decode key and value strings
+        const OString aKeyName = decodeString( reinterpret_cast<char const *>(aKeyLine.getConstArray()), aKeyLine.getLength());
+        const OString aValName = decodeString( reinterpret_cast<char const *>(aValLine.getConstArray()), aValLine.getLength());
+        // insert key-value pair into map
+        add( aKeyName, aValName );
+        // check end-of-file status
+        sal_Bool bIsEOF = true;
+        if( m_MapFile.isEndOfFile( &bIsEOF) != osl::File::E_None )
+            return;
+        if( bIsEOF )
+            break;
+    }
+
+    m_bIsDirty = false;
+}
+
+void PersistentMap::flush()
+{
+    if( !m_bIsDirty)
+        return;
+    if( m_bToBeCreated && !m_entries.empty())
+    {
+        const sal_uInt32 nOpenFlags = osl_File_OpenFlag_Read | osl_File_OpenFlag_Write | osl_File_OpenFlag_Create;
+        const osl::File::RC rcOpen = m_MapFile.open( nOpenFlags);
+        m_bIsOpen = (rcOpen == osl::File::E_None);
+        m_bToBeCreated = !m_bIsOpen;
+    }
+    if( !m_bIsOpen)
+        return;
+
+    // write header magic
+    const osl::FileBase::RC nRes = m_MapFile.setPos( osl_Pos_Absolut, 0);
+    if (nRes != osl::FileBase::E_None)
+    {
+        SAL_WARN("desktop.deployment", "setPos failed with " << +nRes);
+        return;
+    }
+    sal_uInt64 nBytesWritten = 0;
+    m_MapFile.write( PmapMagic, sizeof(PmapMagic), nBytesWritten);
+
+    // write key value pairs
+    for (auto const& entry : m_entries)
+    {
+        // write line for key
+        const OString aKeyString = encodeString( entry.first);
+        const sal_Int32 nKeyLen = aKeyString.getLength();
+        m_MapFile.write( aKeyString.getStr(), nKeyLen, nBytesWritten);
+        OSL_ASSERT( o3tl::make_unsigned(nKeyLen) == nBytesWritten);
+        m_MapFile.write( "\n", 1, nBytesWritten);
+        // write line for value
+        const OString& rValString = encodeString( entry.second);
+        const sal_Int32 nValLen = rValString.getLength();
+        m_MapFile.write( rValString.getStr(), nValLen, nBytesWritten);
+        OSL_ASSERT( o3tl::make_unsigned(nValLen) == nBytesWritten);
+        m_MapFile.write( "\n", 1, nBytesWritten);
+    }
+
+    // write a file delimiter (an empty key-string)
+    m_MapFile.write( "\n", 1, nBytesWritten);
+    // truncate file here
+    sal_uInt64 nNewFileSize;
+    if( m_MapFile.getPos( nNewFileSize) == osl::File::E_None)
+        m_MapFile.setSize( nNewFileSize);
+    // flush to disk
+    m_MapFile.sync();
+    // the in-memory map now matches to the file on disk
+    m_bIsDirty = false;
+}
+
+bool PersistentMap::has( OString const & key ) const
+{
+    return get( nullptr, key );
+}
+
+bool PersistentMap::get( OString * value, OString const & key ) const
+{
+    t_string2string_map::const_iterator it = m_entries.find( key);
+    if( it == m_entries.end())
+        return false;
+    if( value)
+        *value = it->second;
+    return true;
+}
+
+void PersistentMap::add( OString const & key, OString const & value )
+{
+    auto r = m_entries.emplace(key,value);
+    m_bIsDirty = r.second;
+}
+
+
+void PersistentMap::put( OString const & key, OString const & value )
+{
+    add( key, value);
+    // HACK: flush now as the extension manager does not seem
+    //       to properly destruct this object in some situations
+    if(m_bIsDirty)
+        flush();
+}
+
+bool PersistentMap::erase( OString const & key )
+{
+    size_t nCount = m_entries.erase( key);
+    if( !nCount)
+        return false;
+    m_bIsDirty = true;
+    flush();
+    return true;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/dp_xml.cxx b/desktop/source/deployment/dp_xml.cxx
new file mode 100644
index 000000000..d61267e2f
--- /dev/null
+++ b/desktop/source/deployment/dp_xml.cxx
@@ -0,0 +1,51 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <dp_xml.h>
+#include <ucbhelper/content.hxx>
+#include <com/sun/star/xml/sax/Parser.hpp>
+
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_misc
+{
+
+
+void xml_parse(
+    Reference<xml::sax::XDocumentHandler> const & xDocHandler,
+    ::ucbhelper::Content & ucb_content,
+    Reference<XComponentContext> const & xContext )
+{
+    // raise sax parser:
+    Reference<xml::sax::XParser> xParser = xml::sax::Parser::create(xContext);
+
+    // error handler, entity resolver omitted
+    xParser->setDocumentHandler( xDocHandler );
+    xml::sax::InputSource source;
+    source.aInputStream = ucb_content.openStream();
+    source.sSystemId = ucb_content.getURL();
+    xParser->parseStream( source );
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/deploymentgui.component b/desktop/source/deployment/gui/deploymentgui.component
new file mode 100644
index 000000000..3b56863c1
--- /dev/null
+++ b/desktop/source/deployment/gui/deploymentgui.component
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.deployment.ui.LicenseDialog"
+    constructor="desktop_LicenseDialog_get_implementation">
+    <service name="com.sun.star.deployment.ui.LicenseDialog"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.ui.PackageManagerDialog"
+    constructor="desktop_ServiceImpl_get_implementation">
+    <service name="com.sun.star.deployment.ui.PackageManagerDialog"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.deployment.ui.UpdateRequiredDialog"
+    constructor="desktop_UpdateRequiredDialogService_get_implementation">
+    <service name="com.sun.star.deployment.ui.UpdateRequiredDialog"/>
+  </implementation>
+</component>
diff --git a/desktop/source/deployment/gui/dp_gui.h b/desktop/source/deployment/gui/dp_gui.h
new file mode 100644
index 000000000..cb2932ca4
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui.h
@@ -0,0 +1,28 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+namespace dp_gui {
+
+enum PackageState { REGISTERED, NOT_REGISTERED, AMBIGUOUS, NOT_AVAILABLE };
+
+} // namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_dependencydialog.cxx b/desktop/source/deployment/gui/dp_gui_dependencydialog.cxx
new file mode 100644
index 000000000..f94b29891
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_dependencydialog.cxx
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <rtl/ustring.hxx>
+#include <vcl/weld.hxx>
+
+#include "dp_gui_dependencydialog.hxx"
+
+using dp_gui::DependencyDialog;
+
+DependencyDialog::DependencyDialog(weld::Window* parent, std::vector<OUString> const& dependencies)
+    : GenericDialogController(parent, "desktop/ui/dependenciesdialog.ui", "Dependencies")
+    , m_xList(m_xBuilder->weld_tree_view("depListTreeview"))
+{
+    m_xList->set_size_request(-1, m_xList->get_height_rows(10));
+    for (auto const& dependency : dependencies)
+    {
+        m_xList->append_text(dependency);
+    }
+}
+
+DependencyDialog::~DependencyDialog() {}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_dependencydialog.hxx b/desktop/source/deployment/gui/dp_gui_dependencydialog.hxx
new file mode 100644
index 000000000..bdbab41d1
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_dependencydialog.hxx
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vcl/weld.hxx>
+
+#include <vector>
+
+namespace vcl
+{
+class Window;
+}
+
+namespace dp_gui
+{
+class DependencyDialog : public weld::GenericDialogController
+{
+public:
+    DependencyDialog(weld::Window* parent, std::vector<OUString> const& dependencies);
+    virtual ~DependencyDialog() override;
+
+private:
+    DependencyDialog(DependencyDialog const&) = delete;
+    DependencyDialog& operator=(DependencyDialog const&) = delete;
+
+    std::unique_ptr<weld::TreeView> m_xList;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_dialog2.cxx b/desktop/source/deployment/gui/dp_gui_dialog2.cxx
new file mode 100644
index 000000000..7fd0bdac3
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_dialog2.cxx
@@ -0,0 +1,1403 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_extensions.h>
+
+#include <strings.hrc>
+#include <helpids.h>
+
+#include "dp_gui.h"
+#include "dp_gui_dialog2.hxx"
+#include "dp_gui_extlistbox.hxx"
+#include <dp_shared.hxx>
+#include "dp_gui_theextmgr.hxx"
+#include "dp_gui_extensioncmdqueue.hxx"
+#include <dp_misc.h>
+#include <dp_update.hxx>
+#include <dp_identifier.hxx>
+
+#include <fpicker/strings.hrc>
+
+#include <utility>
+#include <vcl/commandevent.hxx>
+#include <vcl/svapp.hxx>
+
+#include <osl/mutex.hxx>
+#include <sal/log.hxx>
+#include <rtl/ustrbuf.hxx>
+
+#include <svtools/restartdialog.hxx>
+
+#include <sfx2/filedlghelper.hxx>
+#include <sfx2/sfxdlg.hxx>
+
+#include <comphelper/anytostring.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <comphelper/processfactory.hxx>
+#include <tools/diagnose_ex.h>
+#include <unotools/configmgr.hxx>
+
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/system/SystemShellExecuteFlags.hpp>
+#include <com/sun/star/system/SystemShellExecute.hpp>
+
+#include <com/sun/star/ui/dialogs/ExecutableDialogResults.hpp>
+#include <com/sun/star/ui/dialogs/TemplateDescription.hpp>
+#include <com/sun/star/ui/dialogs/XFilePicker3.hpp>
+
+#include <officecfg/Office/ExtensionManager.hxx>
+
+#include <map>
+#include <memory>
+#include <vector>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::system;
+
+
+namespace dp_gui {
+
+constexpr OUStringLiteral USER_PACKAGE_MANAGER = u"user";
+constexpr OUStringLiteral SHARED_PACKAGE_MANAGER = u"shared";
+constexpr OUStringLiteral BUNDLED_PACKAGE_MANAGER = u"bundled";
+
+// ExtBoxWithBtns_Impl
+class ExtBoxWithBtns_Impl : public ExtensionBox_Impl
+{
+    bool            m_bInterfaceLocked;
+
+    ExtMgrDialog*   m_pParent;
+
+    void            SetButtonStatus( const TEntry_Impl& rEntry );
+    OString         ShowPopupMenu( const Point &rPos, const tools::Long nPos );
+
+public:
+    explicit ExtBoxWithBtns_Impl(std::unique_ptr<weld::ScrolledWindow> xScroll);
+
+    void InitFromDialog(ExtMgrDialog *pParentDialog);
+
+    virtual bool    MouseButtonDown( const MouseEvent& rMEvt ) override;
+    virtual bool    Command( const CommandEvent& rCEvt ) override;
+
+    virtual void    RecalcAll() override;
+    virtual void    selectEntry( const tools::Long nPos ) override;
+
+    void            enableButtons( bool bEnable );
+};
+
+ExtBoxWithBtns_Impl::ExtBoxWithBtns_Impl(std::unique_ptr<weld::ScrolledWindow> xScroll)
+    : ExtensionBox_Impl(std::move(xScroll))
+    , m_bInterfaceLocked(false)
+    , m_pParent(nullptr)
+{
+}
+
+void ExtBoxWithBtns_Impl::InitFromDialog(ExtMgrDialog *pParentDialog)
+{
+    setExtensionManager(pParentDialog->getExtensionManager());
+
+    m_pParent = pParentDialog;
+}
+
+void ExtBoxWithBtns_Impl::RecalcAll()
+{
+    const sal_Int32 nActive = getSelIndex();
+
+    if ( nActive != ExtensionBox_Impl::ENTRY_NOTFOUND )
+    {
+        SetButtonStatus( GetEntryData( nActive) );
+    }
+    else
+    {
+        m_pParent->enableOptionsButton( false );
+        m_pParent->enableRemoveButton( false );
+        m_pParent->enableEnableButton( false );
+    }
+
+    ExtensionBox_Impl::RecalcAll();
+}
+
+
+//This function may be called with nPos < 0
+void ExtBoxWithBtns_Impl::selectEntry( const tools::Long nPos )
+{
+    if ( HasActive() && ( nPos == getSelIndex() ) )
+        return;
+
+    ExtensionBox_Impl::selectEntry( nPos );
+}
+
+void ExtBoxWithBtns_Impl::SetButtonStatus(const TEntry_Impl& rEntry)
+{
+    bool bShowOptionBtn = true;
+
+    rEntry->m_bHasButtons = false;
+    if ( ( rEntry->m_eState == REGISTERED ) || ( rEntry->m_eState == NOT_AVAILABLE ) )
+    {
+        m_pParent->enableButtontoEnable( false );
+    }
+    else
+    {
+        m_pParent->enableButtontoEnable( true );
+        bShowOptionBtn = false;
+    }
+
+    if ( ( !rEntry->m_bUser || ( rEntry->m_eState == NOT_AVAILABLE ) || rEntry->m_bMissingDeps )
+         && !rEntry->m_bMissingLic )
+    {
+        m_pParent->enableEnableButton( false );
+    }
+    else
+    {
+        m_pParent->enableEnableButton( !rEntry->m_bLocked );
+        rEntry->m_bHasButtons = true;
+    }
+
+    if ( rEntry->m_bHasOptions && bShowOptionBtn )
+    {
+        m_pParent->enableOptionsButton( true );
+        rEntry->m_bHasButtons = true;
+    }
+    else
+    {
+        m_pParent->enableOptionsButton( false );
+    }
+
+    if ( rEntry->m_bUser || rEntry->m_bShared )
+    {
+        m_pParent->enableRemoveButton( !rEntry->m_bLocked );
+        rEntry->m_bHasButtons = true;
+    }
+    else
+    {
+        m_pParent->enableRemoveButton( false );
+    }
+}
+
+bool ExtBoxWithBtns_Impl::Command(const CommandEvent& rCEvt)
+{
+    if (rCEvt.GetCommand() != CommandEventId::ContextMenu)
+        return ExtensionBox_Impl::Command(rCEvt);
+
+    const Point aMousePos(rCEvt.GetMousePosPixel());
+    const auto nPos = PointToPos(aMousePos);
+    OString sCommand = ShowPopupMenu(aMousePos, nPos);
+
+    if (sCommand == "CMD_ENABLE")
+        m_pParent->enablePackage( GetEntryData( nPos )->m_xPackage, true );
+    else if (sCommand == "CMD_DISABLE")
+        m_pParent->enablePackage( GetEntryData( nPos )->m_xPackage, false );
+    else if (sCommand == "CMD_UPDATE")
+        m_pParent->updatePackage( GetEntryData( nPos )->m_xPackage );
+    else if (sCommand == "CMD_REMOVE")
+        m_pParent->removePackage( GetEntryData( nPos )->m_xPackage );
+    else if (sCommand == "CMD_SHOW_LICENSE")
+    {
+        m_pParent->incBusy();
+        ShowLicenseDialog aLicenseDlg(m_pParent->getDialog(), GetEntryData(nPos)->m_xPackage);
+        aLicenseDlg.run();
+        m_pParent->decBusy();
+    }
+
+    return true;
+}
+
+OString ExtBoxWithBtns_Impl::ShowPopupMenu( const Point & rPos, const tools::Long nPos )
+{
+    if ( nPos >= static_cast<tools::Long>(getItemCount()) )
+        return "CMD_NONE";
+
+    std::unique_ptr<weld::Builder> xBuilder(Application::CreateBuilder(nullptr, "desktop/ui/extensionmenu.ui"));
+    std::unique_ptr<weld::Menu> xPopup(xBuilder->weld_menu("menu"));
+
+#if ENABLE_EXTENSION_UPDATE
+    xPopup->append("CMD_UPDATE", DpResId( RID_CTX_ITEM_CHECK_UPDATE ) );
+#endif
+
+    if ( ! GetEntryData( nPos )->m_bLocked )
+    {
+        if ( GetEntryData( nPos )->m_bUser )
+        {
+            if ( GetEntryData( nPos )->m_eState == REGISTERED )
+                xPopup->append("CMD_DISABLE", DpResId(RID_CTX_ITEM_DISABLE));
+            else if ( GetEntryData( nPos )->m_eState != NOT_AVAILABLE )
+                xPopup->append("CMD_ENABLE", DpResId(RID_CTX_ITEM_ENABLE));
+        }
+        if (!officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionRemoval::get())
+        {
+            xPopup->append("CMD_REMOVE", DpResId(RID_CTX_ITEM_REMOVE));
+        }
+    }
+
+    if ( !GetEntryData( nPos )->m_sLicenseText.isEmpty() )
+        xPopup->append("CMD_SHOW_LICENSE", DpResId(RID_STR_SHOW_LICENSE_CMD));
+
+    return xPopup->popup_at_rect(GetDrawingArea(), tools::Rectangle(rPos, Size(1, 1)));
+}
+
+bool ExtBoxWithBtns_Impl::MouseButtonDown( const MouseEvent& rMEvt )
+{
+    if (m_bInterfaceLocked)
+        return false;
+    return ExtensionBox_Impl::MouseButtonDown(rMEvt);
+}
+
+void ExtBoxWithBtns_Impl::enableButtons( bool bEnable )
+{
+    m_bInterfaceLocked = ! bEnable;
+
+    if ( bEnable )
+    {
+        sal_Int32 nIndex = getSelIndex();
+        if ( nIndex != ExtensionBox_Impl::ENTRY_NOTFOUND )
+            SetButtonStatus( GetEntryData( nIndex ) );
+    }
+    else
+    {
+        m_pParent->enableEnableButton( false );
+        m_pParent->enableOptionsButton( false );
+        m_pParent->enableRemoveButton( false );
+    }
+}
+
+//                             DialogHelper
+
+DialogHelper::DialogHelper(const uno::Reference< uno::XComponentContext > &xContext,
+                           weld::Window* pWindow)
+    : m_pWindow(pWindow)
+    , m_nEventID(nullptr)
+{
+    m_xContext = xContext;
+}
+
+DialogHelper::~DialogHelper()
+{
+    if ( m_nEventID )
+        Application::RemoveUserEvent( m_nEventID );
+}
+
+
+bool DialogHelper::IsSharedPkgMgr( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    return xPackage->getRepositoryName() == SHARED_PACKAGE_MANAGER;
+}
+
+bool DialogHelper::continueOnSharedExtension( const uno::Reference< deployment::XPackage > &xPackage,
+                                              weld::Widget* pParent,
+                                              TranslateId pResID,
+                                              bool &bHadWarning )
+{
+    if ( !bHadWarning && IsSharedPkgMgr( xPackage ) )
+    {
+        const SolarMutexGuard guard;
+        incBusy();
+        std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(pParent,
+                                                  VclMessageType::Warning, VclButtonsType::OkCancel, DpResId(pResID)));
+        bHadWarning = true;
+
+        bool bRet = RET_OK == xBox->run();
+        xBox.reset();
+        decBusy();
+        return bRet;
+    }
+    else
+        return true;
+}
+
+void DialogHelper::openWebBrowser(const OUString& sURL, const OUString& sTitle)
+{
+    if ( sURL.isEmpty() ) // Nothing to do, when the URL is empty
+        return;
+
+    try
+    {
+        uno::Reference< XSystemShellExecute > xSystemShellExecute(
+            SystemShellExecute::create(m_xContext));
+        //throws css::lang::IllegalArgumentException, css::system::SystemShellExecuteException
+        xSystemShellExecute->execute( sURL, OUString(),  SystemShellExecuteFlags::URIS_ONLY );
+    }
+    catch ( const uno::Exception& )
+    {
+        uno::Any exc( ::cppu::getCaughtException() );
+        OUString msg( ::comphelper::anyToString( exc ) );
+        const SolarMutexGuard guard;
+        incBusy();
+        std::unique_ptr<weld::MessageDialog> xErrorBox(Application::CreateMessageDialog(getFrameWeld(),
+                                                       VclMessageType::Warning, VclButtonsType::Ok, msg));
+        xErrorBox->set_title(sTitle);
+        xErrorBox->run();
+        xErrorBox.reset();
+        decBusy();
+    }
+}
+
+bool DialogHelper::installExtensionWarn(std::u16string_view rExtensionName)
+{
+    const SolarMutexGuard guard;
+
+    // Check if extension installation is disabled in the expert configurations
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get())
+    {
+        incBusy();
+        std::unique_ptr<weld::MessageDialog> xWarnBox(Application::CreateMessageDialog(getFrameWeld(),
+                                                      VclMessageType::Warning, VclButtonsType::Ok,
+                                                      DpResId(RID_STR_WARNING_INSTALL_EXTENSION_DISABLED)));
+        xWarnBox->run();
+        xWarnBox.reset();
+        decBusy();
+
+        return false;
+    }
+
+    incBusy();
+    std::unique_ptr<weld::MessageDialog> xInfoBox(Application::CreateMessageDialog(getFrameWeld(),
+                                                  VclMessageType::Warning, VclButtonsType::OkCancel,
+                                                  DpResId(RID_STR_WARNING_INSTALL_EXTENSION)));
+    OUString sText(xInfoBox->get_primary_text());
+    sText = sText.replaceAll("%NAME", rExtensionName);
+    xInfoBox->set_primary_text(sText);
+
+    bool bRet = RET_OK == xInfoBox->run();
+    xInfoBox.reset();
+    decBusy();
+    return bRet;
+}
+
+bool DialogHelper::installForAllUsers(bool &bInstallForAll)
+{
+    const SolarMutexGuard guard;
+    incBusy();
+    std::unique_ptr<weld::Builder> xBuilder(Application::CreateBuilder(getFrameWeld(), "desktop/ui/installforalldialog.ui"));
+    std::unique_ptr<weld::MessageDialog> xQuery(xBuilder->weld_message_dialog("InstallForAllDialog"));
+    short nRet = xQuery->run();
+    xQuery.reset();
+    decBusy();
+    if (nRet == RET_CANCEL)
+        return false;
+
+    bInstallForAll = ( nRet == RET_NO );
+    return true;
+}
+
+void DialogHelper::PostUserEvent( const Link<void*,void>& rLink, void* pCaller )
+{
+    if ( m_nEventID )
+        Application::RemoveUserEvent( m_nEventID );
+
+    m_nEventID = Application::PostUserEvent(rLink, pCaller);
+}
+
+//                             ExtMgrDialog
+ExtMgrDialog::ExtMgrDialog(weld::Window *pParent, TheExtensionManager *pManager)
+    : GenericDialogController(pParent, "desktop/ui/extensionmanager.ui", "ExtensionManagerDialog")
+    , DialogHelper(pManager->getContext(), m_xDialog.get())
+    , m_sAddPackages(DpResId(RID_STR_ADD_PACKAGES))
+    , m_bHasProgress(false)
+    , m_bProgressChanged(false)
+    , m_bStartProgress(false)
+    , m_bStopProgress(false)
+    , m_bEnableWarning(false)
+    , m_bDisableWarning(false)
+    , m_bDeleteWarning(false)
+    , m_bClosed(false)
+    , m_nProgress(0)
+    , m_aIdle( "ExtMgrDialog m_aIdle TimeOutHdl" )
+    , m_pManager(pManager)
+    , m_xExtensionBox(new ExtBoxWithBtns_Impl(m_xBuilder->weld_scrolled_window("scroll", true)))
+    , m_xExtensionBoxWnd(new weld::CustomWeld(*m_xBuilder, "extensions", *m_xExtensionBox))
+    , m_xOptionsBtn(m_xBuilder->weld_button("optionsbtn"))
+    , m_xAddBtn(m_xBuilder->weld_button("addbtn"))
+    , m_xRemoveBtn(m_xBuilder->weld_button("removebtn"))
+    , m_xEnableBtn(m_xBuilder->weld_button("enablebtn"))
+    , m_xUpdateBtn(m_xBuilder->weld_button("updatebtn"))
+    , m_xCloseBtn(m_xBuilder->weld_button("close"))
+    , m_xBundledCbx(m_xBuilder->weld_check_button("bundled"))
+    , m_xSharedCbx(m_xBuilder->weld_check_button("shared"))
+    , m_xUserCbx(m_xBuilder->weld_check_button("user"))
+    , m_xGetExtensions(m_xBuilder->weld_link_button("getextensions"))
+    , m_xProgressText(m_xBuilder->weld_label("progressft"))
+    , m_xProgressBar(m_xBuilder->weld_progress_bar("progressbar"))
+    , m_xCancelBtn(m_xBuilder->weld_button("cancel"))
+    , m_xSearchEntry(m_xBuilder->weld_entry("search"))
+{
+    m_xExtensionBox->InitFromDialog(this);
+
+    m_xEnableBtn->set_help_id(HID_EXTENSION_MANAGER_LISTBOX_ENABLE);
+
+    m_xOptionsBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleOptionsBtn ) );
+    m_xAddBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleAddBtn ) );
+    m_xRemoveBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleRemoveBtn ) );
+    m_xEnableBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleEnableBtn ) );
+    m_xCloseBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleCloseBtn ) );
+
+    m_xCancelBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleCancelBtn ) );
+
+    m_xBundledCbx->connect_toggled( LINK( this, ExtMgrDialog, HandleExtTypeCbx ) );
+    m_xSharedCbx->connect_toggled( LINK( this, ExtMgrDialog, HandleExtTypeCbx ) );
+    m_xUserCbx->connect_toggled( LINK( this, ExtMgrDialog, HandleExtTypeCbx ) );
+
+    m_xSearchEntry->connect_changed( LINK( this, ExtMgrDialog, HandleSearch ) );
+
+    m_xBundledCbx->set_active(true);
+    m_xSharedCbx->set_active(true);
+    m_xUserCbx->set_active(true);
+
+    m_xProgressBar->hide();
+
+#if ENABLE_EXTENSION_UPDATE
+    m_xUpdateBtn->connect_clicked( LINK( this, ExtMgrDialog, HandleUpdateBtn ) );
+    m_xUpdateBtn->set_sensitive(false);
+#else
+    m_xUpdateBtn->hide();
+#endif
+
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get())
+    {
+        m_xAddBtn->set_sensitive(false);
+        m_xAddBtn->set_tooltip_text(DpResId(RID_STR_WARNING_INSTALL_EXTENSION_DISABLED));
+    }
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionRemoval::get())
+    {
+        m_xRemoveBtn->set_sensitive(false);
+        m_xRemoveBtn->set_tooltip_text(DpResId(RID_STR_WARNING_REMOVE_EXTENSION_DISABLED));
+    }
+
+    m_aIdle.SetPriority(TaskPriority::LOWEST);
+    m_aIdle.SetInvokeHandler( LINK( this, ExtMgrDialog, TimeOutHdl ) );
+}
+
+ExtMgrDialog::~ExtMgrDialog()
+{
+    m_aIdle.Stop();
+}
+
+void ExtMgrDialog::setGetExtensionsURL( const OUString &rURL )
+{
+    m_xGetExtensions->set_uri( rURL );
+}
+
+void ExtMgrDialog::addPackageToList( const uno::Reference< deployment::XPackage > &xPackage,
+                                     bool bLicenseMissing )
+{
+    const SolarMutexGuard aGuard;
+    m_xUpdateBtn->set_sensitive(true);
+
+    bool bSearchMatch = m_xSearchEntry->get_text().isEmpty();
+    if (!m_xSearchEntry->get_text().isEmpty()
+        && xPackage->getDisplayName().toAsciiLowerCase().indexOf(
+               m_xSearchEntry->get_text().toAsciiLowerCase())
+               >= 0)
+    {
+        bSearchMatch = true;
+    }
+
+    if (!bSearchMatch)
+        return;
+
+    if (m_xBundledCbx->get_active() && (xPackage->getRepositoryName() == BUNDLED_PACKAGE_MANAGER) )
+    {
+        m_xExtensionBox->addEntry( xPackage, bLicenseMissing );
+    }
+    else if (m_xSharedCbx->get_active() && (xPackage->getRepositoryName() == SHARED_PACKAGE_MANAGER) )
+    {
+        m_xExtensionBox->addEntry( xPackage, bLicenseMissing );
+    }
+    else if (m_xUserCbx->get_active() && (xPackage->getRepositoryName() == USER_PACKAGE_MANAGER ))
+    {
+        m_xExtensionBox->addEntry( xPackage, bLicenseMissing );
+    }
+}
+
+void ExtMgrDialog::updateList()
+{
+    // re-creates the list of packages with addEntry selecting the packages
+    prepareChecking();
+    m_pManager->createPackageList();
+    checkEntries();
+}
+
+void ExtMgrDialog::prepareChecking()
+{
+    m_xExtensionBox->prepareChecking();
+}
+
+void ExtMgrDialog::checkEntries()
+{
+    const SolarMutexGuard guard;
+    m_xExtensionBox->checkEntries();
+}
+
+bool ExtMgrDialog::removeExtensionWarn(std::u16string_view rExtensionName)
+{
+    const SolarMutexGuard guard;
+    incBusy();
+    std::unique_ptr<weld::MessageDialog> xInfoBox(Application::CreateMessageDialog(m_xDialog.get(),
+                                                  VclMessageType::Warning, VclButtonsType::OkCancel,
+                                                  DpResId(RID_STR_WARNING_REMOVE_EXTENSION)));
+
+    OUString sText(xInfoBox->get_primary_text());
+    sText = sText.replaceAll("%NAME", rExtensionName);
+    xInfoBox->set_primary_text(sText);
+
+    bool bRet = RET_OK == xInfoBox->run();
+    xInfoBox.reset();
+    decBusy();
+
+    return bRet;
+}
+
+void ExtMgrDialog::enablePackage( const uno::Reference< deployment::XPackage > &xPackage,
+                                  bool bEnable )
+{
+    if ( !xPackage.is() )
+        return;
+
+    if ( bEnable )
+    {
+        if (!continueOnSharedExtension(xPackage, m_xDialog.get(), RID_STR_WARNING_ENABLE_SHARED_EXTENSION, m_bEnableWarning))
+            return;
+    }
+    else
+    {
+        if (!continueOnSharedExtension(xPackage, m_xDialog.get(), RID_STR_WARNING_DISABLE_SHARED_EXTENSION, m_bDisableWarning))
+            return;
+    }
+
+    m_pManager->getCmdQueue()->enableExtension( xPackage, bEnable );
+}
+
+
+void ExtMgrDialog::removePackage( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return;
+
+    if ( !IsSharedPkgMgr( xPackage ) || m_bDeleteWarning )
+    {
+        if ( ! removeExtensionWarn( xPackage->getDisplayName() ) )
+            return;
+    }
+
+    if (!continueOnSharedExtension(xPackage, m_xDialog.get(), RID_STR_WARNING_REMOVE_SHARED_EXTENSION, m_bDeleteWarning))
+        return;
+
+    m_pManager->getCmdQueue()->removeExtension( xPackage );
+}
+
+
+void ExtMgrDialog::updatePackage( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return;
+
+    // get the extension with highest version
+    uno::Sequence<uno::Reference<deployment::XPackage> > seqExtensions =
+    m_pManager->getExtensionManager()->getExtensionsWithSameIdentifier(
+        dp_misc::getIdentifier(xPackage), xPackage->getName(), uno::Reference<ucb::XCommandEnvironment>());
+    uno::Reference<deployment::XPackage> extension =
+        dp_misc::getExtensionWithHighestVersion(seqExtensions);
+    OSL_ASSERT(extension.is());
+    std::vector< css::uno::Reference< css::deployment::XPackage > > vEntries { extension };
+
+    m_pManager->getCmdQueue()->checkForUpdates( std::move(vEntries) );
+}
+
+
+bool ExtMgrDialog::acceptLicense( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return false;
+
+    m_pManager->getCmdQueue()->acceptLicense( xPackage );
+
+    return true;
+}
+
+
+uno::Sequence< OUString > ExtMgrDialog::raiseAddPicker()
+{
+    sfx2::FileDialogHelper aDlgHelper(ui::dialogs::TemplateDescription::FILEOPEN_SIMPLE, FileDialogFlags::NONE, m_xDialog.get());
+    aDlgHelper.SetContext(sfx2::FileDialogHelper::ExtensionManager);
+    const uno::Reference<ui::dialogs::XFilePicker3>& xFilePicker = aDlgHelper.GetFilePicker();
+    xFilePicker->setTitle( m_sAddPackages );
+
+    // collect and set filter list:
+    typedef std::map< OUString, OUString > t_string2string;
+    t_string2string title2filter;
+    OUStringBuffer supportedFilters;
+
+    const uno::Sequence< uno::Reference< deployment::XPackageTypeInfo > > packageTypes(
+        m_pManager->getExtensionManager()->getSupportedPackageTypes() );
+
+    for ( uno::Reference< deployment::XPackageTypeInfo > const & xPackageType : packageTypes )
+    {
+        const OUString filter( xPackageType->getFileFilter() );
+        if (!filter.isEmpty())
+        {
+            const OUString title( xPackageType->getShortDescription() );
+            const std::pair< t_string2string::iterator, bool > insertion(
+                title2filter.emplace( title, filter ) );
+            if (!supportedFilters.isEmpty())
+                supportedFilters.append(';');
+            supportedFilters.append(filter);
+            if ( ! insertion.second )
+            { // already existing, append extensions:
+                insertion.first->second = insertion.first->second +
+                    ";" + filter;
+            }
+        }
+    }
+
+    static const OUString StrAllFiles = []()
+        {
+            const SolarMutexGuard guard;
+            std::locale loc = Translate::Create("fps");
+            return Translate::get(STR_FILTERNAME_ALL, loc);
+        }();
+
+    // All files at top:
+    xFilePicker->appendFilter( StrAllFiles, "*.*" );
+    xFilePicker->appendFilter( DpResId(RID_STR_ALL_SUPPORTED), supportedFilters.makeStringAndClear() );
+    // then supported ones:
+    for (auto const& elem : title2filter)
+    {
+        try
+        {
+            xFilePicker->appendFilter( elem.first, elem.second );
+        }
+        catch (const lang::IllegalArgumentException &)
+        {
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+    }
+    xFilePicker->setCurrentFilter( DpResId(RID_STR_ALL_SUPPORTED) );
+
+    if ( xFilePicker->execute() != ui::dialogs::ExecutableDialogResults::OK )
+        return uno::Sequence<OUString>(); // cancelled
+
+    uno::Sequence< OUString > files( xFilePicker->getSelectedFiles() );
+    OSL_ASSERT( files.hasElements() );
+    return files;
+}
+
+void ExtMgrDialog::enableOptionsButton( bool bEnable )
+{
+    m_xOptionsBtn->set_sensitive( bEnable );
+}
+
+void ExtMgrDialog::enableRemoveButton( bool bEnable )
+{
+    m_xRemoveBtn->set_sensitive( bEnable && !officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionRemoval::get());
+
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionRemoval::get())
+    {
+        m_xRemoveBtn->set_tooltip_text(DpResId(RID_STR_WARNING_REMOVE_EXTENSION_DISABLED));
+    }
+    else
+    {
+        m_xRemoveBtn->set_tooltip_text("");
+    }
+}
+
+void ExtMgrDialog::enableEnableButton( bool bEnable )
+{
+    m_xEnableBtn->set_sensitive( bEnable );
+}
+
+void ExtMgrDialog::enableButtontoEnable( bool bEnable )
+{
+    if (bEnable)
+    {
+        m_xEnableBtn->set_label( DpResId( RID_CTX_ITEM_ENABLE ) );
+        m_xEnableBtn->set_help_id( HID_EXTENSION_MANAGER_LISTBOX_ENABLE );
+    }
+    else
+    {
+        m_xEnableBtn->set_label( DpResId( RID_CTX_ITEM_DISABLE ) );
+        m_xEnableBtn->set_help_id( HID_EXTENSION_MANAGER_LISTBOX_DISABLE );
+    }
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleCancelBtn, weld::Button&, void)
+{
+    if ( m_xAbortChannel.is() )
+    {
+        try
+        {
+            m_xAbortChannel->sendAbort();
+        }
+        catch ( const uno::RuntimeException & )
+        {
+            TOOLS_WARN_EXCEPTION( "dbaccess", "" );
+        }
+    }
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleCloseBtn, weld::Button&, void)
+{
+    bool bCallClose = true;
+
+    //only suggest restart if modified and this is the first close attempt
+    if (!m_bClosed && m_pManager->isModified())
+    {
+        m_pManager->clearModified();
+
+        //only suggest restart if we're actually running, e.g. not from standalone unopkg gui
+        if (dp_misc::office_is_running())
+        {
+            SolarMutexGuard aGuard;
+            bCallClose = !::svtools::executeRestartDialog(comphelper::getProcessComponentContext(),
+                                                          m_xDialog.get(),
+                                                          svtools::RESTART_REASON_EXTENSION_INSTALL);
+        }
+    }
+
+    if (bCallClose)
+        m_xDialog->response(RET_CANCEL);
+}
+
+IMPL_LINK( ExtMgrDialog, startProgress, void*, _bLockInterface, void )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+    bool bLockInterface = static_cast<bool>(_bLockInterface);
+
+    if ( m_bStartProgress && !m_bHasProgress )
+        m_aIdle.Start();
+
+    if ( m_bStopProgress )
+    {
+        if ( m_xProgressBar->get_visible() )
+            m_xProgressBar->set_percentage( 100 );
+        m_xAbortChannel.clear();
+
+        SAL_INFO( "desktop.deployment", " startProgress handler: stop" );
+    }
+    else
+    {
+        SAL_INFO( "desktop.deployment", " startProgress handler: start" );
+    }
+
+    m_xCancelBtn->set_sensitive( bLockInterface );
+    m_xAddBtn->set_sensitive( !bLockInterface && !officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get());
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get())
+    {
+        m_xAddBtn->set_tooltip_text(DpResId(RID_STR_WARNING_INSTALL_EXTENSION_DISABLED));
+    }
+    else
+    {
+        m_xAddBtn->set_tooltip_text("");
+    }
+
+    m_xUpdateBtn->set_sensitive( !bLockInterface && m_xExtensionBox->getItemCount() );
+    m_xExtensionBox->enableButtons( !bLockInterface );
+
+    clearEventID();
+}
+
+
+void ExtMgrDialog::showProgress( bool _bStart )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    bool bStart = _bStart;
+
+    if ( bStart )
+    {
+        m_nProgress = 0;
+        m_bStartProgress = true;
+        SAL_INFO( "desktop.deployment", "showProgress start" );
+    }
+    else
+    {
+        m_nProgress = 100;
+        m_bStopProgress = true;
+        SAL_INFO( "desktop.deployment", "showProgress stop!" );
+    }
+
+    DialogHelper::PostUserEvent( LINK( this, ExtMgrDialog, startProgress ), reinterpret_cast<void*>(bStart) );
+    m_aIdle.Start();
+}
+
+
+void ExtMgrDialog::updateProgress( const tools::Long nProgress )
+{
+    if ( m_nProgress != nProgress )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+        m_nProgress = nProgress;
+        m_aIdle.Start();
+    }
+}
+
+
+void ExtMgrDialog::updateProgress( const OUString &rText,
+                                   const uno::Reference< task::XAbortChannel > &xAbortChannel)
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    m_xAbortChannel = xAbortChannel;
+    m_sProgressText = rText;
+    m_bProgressChanged = true;
+    m_aIdle.Start();
+}
+
+
+void ExtMgrDialog::updatePackageInfo( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    const SolarMutexGuard aGuard;
+    m_xExtensionBox->updateEntry( xPackage );
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleOptionsBtn, weld::Button&, void)
+{
+    const sal_Int32 nActive = m_xExtensionBox->getSelIndex();
+
+    if ( nActive != ExtensionBox_Impl::ENTRY_NOTFOUND )
+    {
+        SfxAbstractDialogFactory* pFact = SfxAbstractDialogFactory::Create();
+
+        OUString sExtensionId = m_xExtensionBox->GetEntryData( nActive )->m_xPackage->getIdentifier().Value;
+        ScopedVclPtr<VclAbstractDialog> pDlg(pFact->CreateOptionsDialog(m_xDialog.get(), sExtensionId));
+
+        pDlg->Execute();
+    }
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleAddBtn, weld::Button&, void)
+{
+    incBusy();
+
+    uno::Sequence< OUString > aFileList = raiseAddPicker();
+
+    if ( aFileList.hasElements() )
+    {
+        m_pManager->installPackage( aFileList[0] );
+    }
+
+    decBusy();
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleRemoveBtn, weld::Button&, void)
+{
+    const sal_Int32 nActive = m_xExtensionBox->getSelIndex();
+
+    if ( nActive != ExtensionBox_Impl::ENTRY_NOTFOUND )
+    {
+        TEntry_Impl pEntry = m_xExtensionBox->GetEntryData( nActive );
+        removePackage( pEntry->m_xPackage );
+    }
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleEnableBtn, weld::Button&, void)
+{
+    const sal_Int32 nActive = m_xExtensionBox->getSelIndex();
+
+    if ( nActive != ExtensionBox_Impl::ENTRY_NOTFOUND )
+    {
+        TEntry_Impl pEntry = m_xExtensionBox->GetEntryData( nActive );
+
+        if ( pEntry->m_bMissingLic )
+            acceptLicense( pEntry->m_xPackage );
+        else
+        {
+            const bool bEnable( pEntry->m_eState != REGISTERED );
+            enablePackage( pEntry->m_xPackage, bEnable );
+        }
+    }
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleExtTypeCbx, weld::Toggleable&, void)
+{
+    updateList();
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleSearch, weld::Entry&, void)
+{
+    updateList();
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, HandleUpdateBtn, weld::Button&, void)
+{
+#if ENABLE_EXTENSION_UPDATE
+    m_pManager->checkUpdates();
+#else
+    (void) this;
+#endif
+}
+
+IMPL_LINK_NOARG(ExtMgrDialog, TimeOutHdl, Timer *, void)
+{
+    if ( m_bStopProgress )
+    {
+        m_bHasProgress = false;
+        m_bStopProgress = false;
+        m_xProgressText->hide();
+        m_xProgressBar->hide();
+        m_xCancelBtn->hide();
+    }
+    else
+    {
+        if ( m_bProgressChanged )
+        {
+            m_bProgressChanged = false;
+            m_xProgressText->set_label(m_sProgressText);
+        }
+
+        if ( m_bStartProgress )
+        {
+            m_bStartProgress = false;
+            m_bHasProgress = true;
+            m_xProgressBar->show();
+            m_xProgressText->show();
+            m_xCancelBtn->set_sensitive(true);
+            m_xCancelBtn->show();
+        }
+
+        if ( m_xProgressBar->get_visible() )
+            m_xProgressBar->set_percentage( static_cast<sal_uInt16>(m_nProgress) );
+    }
+}
+
+void ExtMgrDialog::Close()
+{
+    m_pManager->terminateDialog();
+    m_bClosed = true;
+}
+
+//UpdateRequiredDialog
+UpdateRequiredDialog::UpdateRequiredDialog(weld::Window *pParent, TheExtensionManager *pManager)
+    : GenericDialogController(pParent, "desktop/ui/updaterequireddialog.ui", "UpdateRequiredDialog")
+    , DialogHelper(pManager->getContext(), m_xDialog.get())
+    , m_sCloseText(DpResId(RID_STR_CLOSE_BTN))
+    , m_bHasProgress(false)
+    , m_bProgressChanged(false)
+    , m_bStartProgress(false)
+    , m_bStopProgress(false)
+    , m_bHasLockedEntries(false)
+    , m_nProgress(0)
+    , m_aIdle( "UpdateRequiredDialog m_aIdle TimeOutHdl" )
+    , m_pManager(pManager)
+    , m_xExtensionBox(new ExtensionBox_Impl(m_xBuilder->weld_scrolled_window("scroll", true)))
+    , m_xExtensionBoxWnd(new weld::CustomWeld(*m_xBuilder, "extensions", *m_xExtensionBox))
+    , m_xUpdateNeeded(m_xBuilder->weld_label("updatelabel"))
+    , m_xUpdateBtn(m_xBuilder->weld_button("ok"))
+    , m_xCloseBtn(m_xBuilder->weld_button("disable"))
+    , m_xCancelBtn(m_xBuilder->weld_button("cancel"))
+    , m_xProgressText(m_xBuilder->weld_label("progresslabel"))
+    , m_xProgressBar(m_xBuilder->weld_progress_bar("progress"))
+{
+    m_xExtensionBox->setExtensionManager(pManager);
+
+    m_xUpdateBtn->connect_clicked( LINK( this, UpdateRequiredDialog, HandleUpdateBtn ) );
+    m_xCloseBtn->connect_clicked( LINK( this, UpdateRequiredDialog, HandleCloseBtn ) );
+    m_xCancelBtn->connect_clicked( LINK( this, UpdateRequiredDialog, HandleCancelBtn ) );
+
+    OUString aText = m_xUpdateNeeded->get_label();
+    aText = aText.replaceAll(
+        "%PRODUCTNAME", utl::ConfigManager::getProductName());
+    m_xUpdateNeeded->set_label(aText);
+
+    m_xProgressBar->hide();
+    m_xUpdateBtn->set_sensitive( false );
+    m_xCloseBtn->grab_focus();
+
+    m_aIdle.SetPriority( TaskPriority::LOWEST );
+    m_aIdle.SetInvokeHandler( LINK( this, UpdateRequiredDialog, TimeOutHdl ) );
+}
+
+UpdateRequiredDialog::~UpdateRequiredDialog()
+{
+    m_aIdle.Stop();
+}
+
+void UpdateRequiredDialog::addPackageToList( const uno::Reference< deployment::XPackage > &xPackage,
+                                             bool bLicenseMissing )
+{
+    // We will only add entries to the list with unsatisfied dependencies
+    if ( !bLicenseMissing && !checkDependencies( xPackage ) )
+    {
+        m_bHasLockedEntries |= m_pManager->isReadOnly( xPackage );
+        const SolarMutexGuard aGuard;
+        m_xUpdateBtn->set_sensitive(true);
+        m_xExtensionBox->addEntry( xPackage );
+    }
+}
+
+
+void UpdateRequiredDialog::prepareChecking()
+{
+    m_xExtensionBox->prepareChecking();
+}
+
+
+void UpdateRequiredDialog::checkEntries()
+{
+    const SolarMutexGuard guard;
+    m_xExtensionBox->checkEntries();
+
+    if ( ! hasActiveEntries() )
+    {
+        m_xCloseBtn->set_label( m_sCloseText );
+        m_xCloseBtn->grab_focus();
+    }
+}
+
+
+IMPL_LINK_NOARG(UpdateRequiredDialog, HandleCancelBtn, weld::Button&, void)
+{
+    if ( m_xAbortChannel.is() )
+    {
+        try
+        {
+            m_xAbortChannel->sendAbort();
+        }
+        catch ( const uno::RuntimeException & )
+        {
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+    }
+}
+
+
+IMPL_LINK( UpdateRequiredDialog, startProgress, void*, _bLockInterface, void )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+    bool bLockInterface = static_cast<bool>(_bLockInterface);
+
+    if ( m_bStartProgress && !m_bHasProgress )
+        m_aIdle.Start();
+
+    if ( m_bStopProgress )
+    {
+        if ( m_xProgressBar->get_visible() )
+            m_xProgressBar->set_percentage( 100 );
+        m_xAbortChannel.clear();
+        SAL_INFO( "desktop.deployment", " startProgress handler: stop" );
+    }
+    else
+    {
+        SAL_INFO( "desktop.deployment", " startProgress handler: start" );
+    }
+
+    m_xCancelBtn->set_sensitive( bLockInterface );
+    m_xUpdateBtn->set_sensitive( false );
+    clearEventID();
+}
+
+
+void UpdateRequiredDialog::showProgress( bool _bStart )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    bool bStart = _bStart;
+
+    if ( bStart )
+    {
+        m_nProgress = 0;
+        m_bStartProgress = true;
+        SAL_INFO( "desktop.deployment", "showProgress start" );
+    }
+    else
+    {
+        m_nProgress = 100;
+        m_bStopProgress = true;
+        SAL_INFO( "desktop.deployment", "showProgress stop!" );
+    }
+
+    DialogHelper::PostUserEvent( LINK( this, UpdateRequiredDialog, startProgress ), reinterpret_cast<void*>(bStart) );
+    m_aIdle.Start();
+}
+
+
+void UpdateRequiredDialog::updateProgress( const tools::Long nProgress )
+{
+    if ( m_nProgress != nProgress )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+        m_nProgress = nProgress;
+        m_aIdle.Start();
+    }
+}
+
+
+void UpdateRequiredDialog::updateProgress( const OUString &rText,
+                                           const uno::Reference< task::XAbortChannel > &xAbortChannel)
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    m_xAbortChannel = xAbortChannel;
+    m_sProgressText = rText;
+    m_bProgressChanged = true;
+    m_aIdle.Start();
+}
+
+
+void UpdateRequiredDialog::updatePackageInfo( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    // We will remove all updated packages with satisfied dependencies, but
+    // we will show all disabled entries so the user sees the result
+    // of the 'disable all' button
+    const SolarMutexGuard aGuard;
+    if ( isEnabled( xPackage ) && checkDependencies( xPackage ) )
+        m_xExtensionBox->removeEntry( xPackage );
+    else
+        m_xExtensionBox->updateEntry( xPackage );
+
+    if ( ! hasActiveEntries() )
+    {
+        m_xCloseBtn->set_label( m_sCloseText );
+        m_xCloseBtn->grab_focus();
+    }
+}
+
+
+IMPL_LINK_NOARG(UpdateRequiredDialog, HandleUpdateBtn, weld::Button&, void)
+{
+    ::osl::ClearableMutexGuard aGuard( m_aMutex );
+
+    std::vector< uno::Reference< deployment::XPackage > > vUpdateEntries;
+    sal_Int32 nCount = m_xExtensionBox->GetEntryCount();
+
+    for ( sal_Int32 i = 0; i < nCount; ++i )
+    {
+        TEntry_Impl pEntry = m_xExtensionBox->GetEntryData( i );
+        vUpdateEntries.push_back( pEntry->m_xPackage );
+    }
+
+    aGuard.clear();
+
+    m_pManager->getCmdQueue()->checkForUpdates( std::move(vUpdateEntries) );
+}
+
+
+IMPL_LINK_NOARG(UpdateRequiredDialog, HandleCloseBtn, weld::Button&, void)
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !isBusy() )
+    {
+        if ( m_bHasLockedEntries )
+            m_xDialog->response(-1);
+        else if ( hasActiveEntries() )
+            disableAllEntries();
+        else
+            m_xDialog->response(RET_CANCEL);
+    }
+}
+
+
+IMPL_LINK_NOARG(UpdateRequiredDialog, TimeOutHdl, Timer *, void)
+{
+    if ( m_bStopProgress )
+    {
+        m_bHasProgress = false;
+        m_bStopProgress = false;
+        m_xProgressText->hide();
+        m_xProgressBar->hide();
+        m_xCancelBtn->hide();
+    }
+    else
+    {
+        if ( m_bProgressChanged )
+        {
+            m_bProgressChanged = false;
+            m_xProgressText->set_label( m_sProgressText );
+        }
+
+        if ( m_bStartProgress )
+        {
+            m_bStartProgress = false;
+            m_bHasProgress = true;
+            m_xProgressBar->show();
+            m_xProgressText->show();
+            m_xCancelBtn->set_sensitive(true);
+            m_xCancelBtn->show();
+        }
+
+        if (m_xProgressBar->get_visible())
+            m_xProgressBar->set_percentage(m_nProgress);
+    }
+}
+
+// VCL::Dialog
+short UpdateRequiredDialog::run()
+{
+    //ToDo
+    //I believe m_bHasLockedEntries was used to prevent showing extensions which cannot
+    //be disabled because they are in a read only repository. However, disabling extensions
+    //is now always possible because the registration data of all repositories
+    //are in the user installation.
+    //Therefore all extensions could be displayed and all the handling around m_bHasLockedEntries
+    //could be removed.
+    if ( m_bHasLockedEntries )
+    {
+        // Set other text, disable update btn, remove not shared entries from list;
+        m_xUpdateNeeded->set_label( DpResId( RID_STR_NO_ADMIN_PRIVILEGE ) );
+        m_xCloseBtn->set_label( DpResId( RID_STR_EXIT_BTN ) );
+        m_xUpdateBtn->set_sensitive( false );
+        m_xExtensionBox->RemoveUnlocked();
+    }
+
+    return GenericDialogController::run();
+}
+
+// Check dependencies of all packages
+
+bool UpdateRequiredDialog::isEnabled( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    bool bRegistered = false;
+    try {
+        beans::Optional< beans::Ambiguous< sal_Bool > > option( xPackage->isRegistered( uno::Reference< task::XAbortChannel >(),
+                                                                                        uno::Reference< ucb::XCommandEnvironment >() ) );
+        if ( option.IsPresent )
+        {
+            ::beans::Ambiguous< sal_Bool > const & reg = option.Value;
+            if ( reg.IsAmbiguous )
+                bRegistered = false;
+            else
+                bRegistered = reg.Value;
+        }
+        else
+            bRegistered = false;
+    }
+    catch ( const uno::RuntimeException & ) { throw; }
+    catch (const uno::Exception & ) {
+        TOOLS_WARN_EXCEPTION( "desktop", "" );
+        bRegistered = false;
+    }
+
+    return bRegistered;
+}
+
+// Checks the dependencies no matter if the extension is enabled or disabled!
+bool UpdateRequiredDialog::checkDependencies( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    bool bDependenciesValid = false;
+    try {
+        bDependenciesValid = xPackage->checkDependencies( uno::Reference< ucb::XCommandEnvironment >() );
+    }
+    catch ( const deployment::DeploymentException & ) {}
+    return bDependenciesValid;
+}
+
+
+bool UpdateRequiredDialog::hasActiveEntries()
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    bool bRet = false;
+    tools::Long nCount = m_xExtensionBox->GetEntryCount();
+    for ( tools::Long nIndex = 0; nIndex < nCount; nIndex++ )
+    {
+        TEntry_Impl pEntry = m_xExtensionBox->GetEntryData( nIndex );
+
+        if ( isEnabled(pEntry->m_xPackage) && !checkDependencies( pEntry->m_xPackage ) )
+        {
+            bRet = true;
+            break;
+        }
+    }
+
+    return bRet;
+}
+
+
+void UpdateRequiredDialog::disableAllEntries()
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    incBusy();
+
+    tools::Long nCount = m_xExtensionBox->GetEntryCount();
+    for ( tools::Long nIndex = 0; nIndex < nCount; nIndex++ )
+    {
+        TEntry_Impl pEntry = m_xExtensionBox->GetEntryData( nIndex );
+        m_pManager->getCmdQueue()->enableExtension( pEntry->m_xPackage, false );
+    }
+
+    decBusy();
+
+    if ( ! hasActiveEntries() )
+        m_xCloseBtn->set_label( m_sCloseText );
+}
+
+//                             ShowLicenseDialog
+ShowLicenseDialog::ShowLicenseDialog(weld::Window* pParent,
+                                     const uno::Reference< deployment::XPackage> &xPackage)
+    : GenericDialogController(pParent, "desktop/ui/showlicensedialog.ui", "ShowLicenseDialog")
+    , m_xLicenseText(m_xBuilder->weld_text_view("textview"))
+{
+    m_xLicenseText->set_size_request(m_xLicenseText->get_approximate_digit_width() * 72,
+                                     m_xLicenseText->get_height_rows(21));
+    m_xLicenseText->set_text(xPackage->getLicenseText());
+}
+
+ShowLicenseDialog::~ShowLicenseDialog()
+{
+}
+
+// UpdateRequiredDialogService
+
+UpdateRequiredDialogService::UpdateRequiredDialogService( SAL_UNUSED_PARAMETER uno::Sequence< uno::Any > const&,
+                                                          uno::Reference< uno::XComponentContext > xComponentContext )
+    : m_xComponentContext(std::move( xComponentContext ))
+{
+}
+
+// XServiceInfo
+OUString UpdateRequiredDialogService::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.ui.UpdateRequiredDialog";
+}
+
+sal_Bool UpdateRequiredDialogService::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > UpdateRequiredDialogService::getSupportedServiceNames()
+{
+    return { "com.sun.star.deployment.ui.UpdateRequiredDialog" };
+}
+
+
+// XExecutableDialog
+
+void UpdateRequiredDialogService::setTitle( OUString const & )
+{
+}
+
+
+sal_Int16 UpdateRequiredDialogService::execute()
+{
+    ::rtl::Reference< ::dp_gui::TheExtensionManager > xManager( TheExtensionManager::get(
+                                                              m_xComponentContext) );
+    xManager->createDialog( true );
+    sal_Int16 nRet = xManager->execute();
+
+    return nRet;
+}
+
+
+} //namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_dialog2.hxx b/desktop/source/deployment/gui/dp_gui_dialog2.hxx
new file mode 100644
index 000000000..a11ff494e
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_dialog2.hxx
@@ -0,0 +1,267 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vcl/timer.hxx>
+#include <vcl/idle.hxx>
+#include <vcl/locktoplevels.hxx>
+#include <vcl/customweld.hxx>
+#include <vcl/weld.hxx>
+
+#include <osl/mutex.hxx>
+
+#include <rtl/ustring.hxx>
+
+#include <cppuhelper/implbase.hxx>
+#include <unotools/resmgr.hxx>
+
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/ui/dialogs/XExecutableDialog.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+struct ImplSVEvent;
+
+namespace dp_gui {
+
+class ExtBoxWithBtns_Impl;
+class ExtensionBox_Impl;
+class TheExtensionManager;
+
+class DialogHelper
+{
+    css::uno::Reference< css::uno::XComponentContext > m_xContext;
+    weld::Window*   m_pWindow;
+    ImplSVEvent *   m_nEventID;
+    TopLevelWindowLocker m_aBusy;
+
+public:
+                    DialogHelper(const css::uno::Reference< css::uno::XComponentContext > &,
+                                 weld::Window* pWindow);
+    virtual        ~DialogHelper();
+
+    void            openWebBrowser(const OUString& rURL, const OUString& rTitle);
+    weld::Window*   getFrameWeld() const { return m_pWindow; }
+    void            PostUserEvent( const Link<void*,void>& rLink, void* pCaller );
+    void            clearEventID() { m_nEventID = nullptr; }
+
+    virtual void    showProgress( bool bStart ) = 0;
+    virtual void    updateProgress( const OUString &rText,
+                                    const css::uno::Reference< css::task::XAbortChannel > &xAbortChannel) = 0;
+    virtual void    updateProgress( const tools::Long nProgress ) = 0;
+
+    virtual void    updatePackageInfo( const css::uno::Reference< css::deployment::XPackage > &xPackage ) = 0;
+    virtual void    addPackageToList( const css::uno::Reference< css::deployment::XPackage > &xPackage,
+                                      bool bLicenseMissing = false ) = 0;
+
+    virtual void    prepareChecking() = 0;
+    virtual void    checkEntries() = 0;
+
+    static bool     IsSharedPkgMgr( const css::uno::Reference< css::deployment::XPackage > &);
+           bool     continueOnSharedExtension( const css::uno::Reference< css::deployment::XPackage > &,
+                                               weld::Widget* pParent,
+                                               TranslateId pResID,
+                                               bool &bHadWarning );
+
+    void            incBusy() { m_aBusy.incBusy(m_pWindow); }
+    void            decBusy() { m_aBusy.decBusy(); }
+    bool            isBusy() const { return m_aBusy.isBusy(); }
+    bool            installExtensionWarn(std::u16string_view rExtensionURL);
+    bool            installForAllUsers(bool &bInstallForAll);
+};
+
+class ExtMgrDialog : public weld::GenericDialogController
+                   , public DialogHelper
+{
+    const OUString       m_sAddPackages;
+    OUString             m_sProgressText;
+    ::osl::Mutex         m_aMutex;
+    bool                 m_bHasProgress;
+    bool                 m_bProgressChanged;
+    bool                 m_bStartProgress;
+    bool                 m_bStopProgress;
+    bool                 m_bEnableWarning;
+    bool                 m_bDisableWarning;
+    bool                 m_bDeleteWarning;
+    bool                 m_bClosed;
+    tools::Long                 m_nProgress;
+    Idle                 m_aIdle;
+    TheExtensionManager *m_pManager;
+
+    css::uno::Reference< css::task::XAbortChannel > m_xAbortChannel;
+
+    std::unique_ptr<ExtBoxWithBtns_Impl> m_xExtensionBox;
+    std::unique_ptr<weld::CustomWeld> m_xExtensionBoxWnd;
+    std::unique_ptr<weld::Button> m_xOptionsBtn;
+    std::unique_ptr<weld::Button> m_xAddBtn;
+    std::unique_ptr<weld::Button> m_xRemoveBtn;
+    std::unique_ptr<weld::Button> m_xEnableBtn;
+    std::unique_ptr<weld::Button> m_xUpdateBtn;
+    std::unique_ptr<weld::Button> m_xCloseBtn;
+    std::unique_ptr<weld::CheckButton> m_xBundledCbx;
+    std::unique_ptr<weld::CheckButton> m_xSharedCbx;
+    std::unique_ptr<weld::CheckButton> m_xUserCbx;
+    std::unique_ptr<weld::LinkButton> m_xGetExtensions;
+    std::unique_ptr<weld::Label> m_xProgressText;
+    std::unique_ptr<weld::ProgressBar> m_xProgressBar;
+    std::unique_ptr<weld::Button> m_xCancelBtn;
+    std::unique_ptr<weld::Entry> m_xSearchEntry;
+
+    bool removeExtensionWarn(std::u16string_view rExtensionTitle);
+
+    DECL_LINK( HandleOptionsBtn, weld::Button&, void );
+    DECL_LINK( HandleAddBtn, weld::Button&, void );
+    DECL_LINK( HandleRemoveBtn, weld::Button&, void );
+    DECL_LINK( HandleEnableBtn, weld::Button&, void );
+    DECL_LINK( HandleUpdateBtn, weld::Button&, void );
+    DECL_LINK( HandleCancelBtn, weld::Button&, void );
+    DECL_LINK( HandleCloseBtn, weld::Button&, void );
+    DECL_LINK( HandleExtTypeCbx, weld::Toggleable&, void );
+    DECL_LINK( HandleSearch, weld::Entry&, void );
+    DECL_LINK( TimeOutHdl, Timer *, void );
+    DECL_LINK( startProgress, void *, void );
+
+public:
+    ExtMgrDialog(weld::Window * pParent, TheExtensionManager *pManager);
+    virtual ~ExtMgrDialog() override;
+
+    virtual void    showProgress( bool bStart ) override;
+    virtual void    updateProgress( const OUString &rText,
+                                    const css::uno::Reference< css::task::XAbortChannel > &xAbortChannel) override;
+    virtual void    updateProgress( const tools::Long nProgress ) override;
+
+    virtual void    updatePackageInfo( const css::uno::Reference< css::deployment::XPackage > &xPackage ) override;
+
+    void            setGetExtensionsURL( const OUString &rURL );
+    virtual void    addPackageToList( const css::uno::Reference< css::deployment::XPackage > &,
+                                      bool bLicenseMissing = false ) override;
+    void enablePackage(const css::uno::Reference< css::deployment::XPackage > &xPackage,
+                        bool bEnable );
+    void removePackage(const css::uno::Reference< css::deployment::XPackage > &xPackage );
+    void updatePackage(const css::uno::Reference< css::deployment::XPackage > &xPackage );
+    bool acceptLicense(const css::uno::Reference< css::deployment::XPackage > &xPackage );
+
+    void Close();
+
+    TheExtensionManager*    getExtensionManager() const { return m_pManager; }
+
+    virtual void    updateList();
+    virtual void    prepareChecking() override;
+    virtual void    checkEntries() override;
+
+    css::uno::Sequence< OUString > raiseAddPicker();
+
+    void enableOptionsButton( bool bEnable );
+    void enableRemoveButton( bool bEnable );
+    void enableEnableButton( bool bEnable );
+    /*
+     * Transform the button to "Enable", or to "Disable"
+     * based on the value of bEnable.
+     */
+    void enableButtontoEnable( bool bEnable );
+};
+
+
+class UpdateRequiredDialog : public weld::GenericDialogController
+                           , public DialogHelper
+{
+    const OUString       m_sCloseText;
+    OUString             m_sProgressText;
+    ::osl::Mutex         m_aMutex;
+    bool                 m_bHasProgress;
+    bool                 m_bProgressChanged;
+    bool                 m_bStartProgress;
+    bool                 m_bStopProgress;
+    bool                 m_bHasLockedEntries;
+    tools::Long                 m_nProgress;
+    Idle                 m_aIdle;
+    TheExtensionManager *m_pManager;
+
+    css::uno::Reference< css::task::XAbortChannel > m_xAbortChannel;
+
+    std::unique_ptr<ExtensionBox_Impl> m_xExtensionBox;
+    std::unique_ptr<weld::CustomWeld> m_xExtensionBoxWnd;
+    std::unique_ptr<weld::Label> m_xUpdateNeeded;
+    std::unique_ptr<weld::Button> m_xUpdateBtn;
+    std::unique_ptr<weld::Button> m_xCloseBtn;
+    std::unique_ptr<weld::Button> m_xCancelBtn;
+    std::unique_ptr<weld::Label> m_xProgressText;
+    std::unique_ptr<weld::ProgressBar> m_xProgressBar;
+
+    DECL_LINK( HandleUpdateBtn, weld::Button&, void );
+    DECL_LINK( HandleCloseBtn, weld::Button&, void );
+    DECL_LINK( HandleCancelBtn, weld::Button&, void );
+    DECL_LINK( TimeOutHdl, Timer *, void );
+    DECL_LINK( startProgress, void *, void );
+
+    static bool     isEnabled( const css::uno::Reference< css::deployment::XPackage > &xPackage );
+    static bool     checkDependencies( const css::uno::Reference< css::deployment::XPackage > &xPackage );
+    bool            hasActiveEntries();
+    void            disableAllEntries();
+
+public:
+    UpdateRequiredDialog(weld::Window * pParent, TheExtensionManager *pManager);
+    virtual        ~UpdateRequiredDialog() override;
+
+    virtual short   run() override;
+
+    virtual void    showProgress( bool bStart ) override;
+    virtual void    updateProgress( const OUString &rText,
+                                    const css::uno::Reference< css::task::XAbortChannel > &xAbortChannel) override;
+    virtual void    updateProgress( const tools::Long nProgress ) override;
+
+    virtual void    updatePackageInfo( const css::uno::Reference< css::deployment::XPackage > &xPackage ) override;
+
+    virtual void    addPackageToList( const css::uno::Reference< css::deployment::XPackage > &,
+                                      bool bLicenseMissing = false ) override;
+
+    virtual void    prepareChecking() override;
+    virtual void    checkEntries() override;
+};
+
+
+class ShowLicenseDialog : public weld::GenericDialogController
+{
+    std::unique_ptr<weld::TextView> m_xLicenseText;
+public:
+    ShowLicenseDialog(weld::Window * pParent, const css::uno::Reference< css::deployment::XPackage > &xPackage);
+    virtual ~ShowLicenseDialog() override;
+};
+
+class UpdateRequiredDialogService : public ::cppu::WeakImplHelper< css::ui::dialogs::XExecutableDialog, css::lang::XServiceInfo >
+{
+    css::uno::Reference< css::uno::XComponentContext > const m_xComponentContext;
+public:
+    UpdateRequiredDialogService( css::uno::Sequence< css::uno::Any > const & args,
+                                 css::uno::Reference< css::uno::XComponentContext> xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XExecutableDialog
+    virtual void SAL_CALL         setTitle( OUString const & title ) override;
+    virtual sal_Int16 SAL_CALL    execute() override;
+};
+
+} // namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.cxx b/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.cxx
new file mode 100644
index 000000000..fd70b7982
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.cxx
@@ -0,0 +1,1115 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/beans/NamedValue.hpp>
+
+#include <com/sun/star/deployment/DependencyException.hpp>
+#include <com/sun/star/deployment/LicenseException.hpp>
+#include <com/sun/star/deployment/VersionException.hpp>
+#include <com/sun/star/deployment/InstallException.hpp>
+#include <com/sun/star/deployment/PlatformException.hpp>
+
+#include <com/sun/star/deployment/ui/LicenseDialog.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+
+#include <com/sun/star/task/InteractionHandler.hpp>
+#include <com/sun/star/task/XAbortChannel.hpp>
+#include <com/sun/star/task/XInteractionAbort.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+
+#include <com/sun/star/ui/dialogs/ExecutableDialogResults.hpp>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/TypeClass.hpp>
+#include <o3tl/any.hxx>
+#include <osl/diagnose.h>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <salhelper/thread.hxx>
+#include <ucbhelper/content.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/anytostring.hxx>
+#include <utility>
+#include <vcl/svapp.hxx>
+#include <vcl/weld.hxx>
+
+#include "dp_gui_extensioncmdqueue.hxx"
+#include "dp_gui_dependencydialog.hxx"
+#include "dp_gui_dialog2.hxx"
+#include <dp_shared.hxx>
+#include <strings.hrc>
+#include "dp_gui_theextmgr.hxx"
+#include "dp_gui_updatedialog.hxx"
+#include "dp_gui_updateinstalldialog.hxx"
+#include <dp_dependencies.hxx>
+#include <dp_misc.h>
+#include <dp_identifier.hxx>
+#include <dp_version.hxx>
+
+#include <condition_variable>
+#include <queue>
+#include <memory>
+#include <mutex>
+
+#ifdef _WIN32
+#include <o3tl/safeCoInitUninit.hxx>
+#endif
+
+
+using namespace ::com::sun::star;
+
+namespace {
+
+OUString getVersion( OUString const & sVersion )
+{
+    return ( sVersion.isEmpty() ) ? OUString( "0" ) : sVersion;
+}
+
+OUString getVersion( const uno::Reference< deployment::XPackage > &rPackage )
+{
+    return getVersion( rPackage->getVersion());
+}
+}
+
+
+namespace dp_gui {
+
+namespace {
+
+class ProgressCmdEnv
+    : public ::cppu::WeakImplHelper< ucb::XCommandEnvironment,
+                                      task::XInteractionHandler,
+                                      ucb::XProgressHandler >
+{
+    uno::Reference< task::XInteractionHandler2> m_xHandler;
+    uno::Reference< uno::XComponentContext > m_xContext;
+
+    DialogHelper*   m_pDialogHelper;
+    OUString        m_sTitle;
+    bool            m_bWarnUser;
+    sal_Int32       m_nCurrentProgress;
+
+    void updateProgress();
+
+    /// @throws uno::RuntimeException
+    void update_( uno::Any const & Status );
+
+public:
+    /** When param bAskWhenInstalling = true, then the user is asked if he
+    agrees to install this extension. In case this extension is already installed
+    then the user is also notified and asked if he wants to replace that existing
+    extension. In first case an interaction request with an InstallException
+    will be handled and in the second case a VersionException will be handled.
+    */
+
+    ProgressCmdEnv( uno::Reference< uno::XComponentContext > xContext,
+                    DialogHelper* pDialogHelper,
+                    OUString aTitle )
+        : m_xContext(std::move( xContext ))
+        , m_pDialogHelper( pDialogHelper )
+        , m_sTitle(std::move( aTitle ))
+        , m_bWarnUser( false )
+        , m_nCurrentProgress(0)
+        {}
+
+    weld::Window* activeDialog() { return m_pDialogHelper ? m_pDialogHelper->getFrameWeld() : nullptr; }
+
+    void startProgress();
+    void stopProgress();
+    void progressSection( const OUString &rText,
+                          const uno::Reference< task::XAbortChannel > &xAbortChannel );
+    void setWarnUser( bool bNewVal ) { m_bWarnUser = bNewVal; }
+
+    // XCommandEnvironment
+    virtual uno::Reference< task::XInteractionHandler > SAL_CALL getInteractionHandler() override;
+    virtual uno::Reference< ucb::XProgressHandler > SAL_CALL getProgressHandler() override;
+
+    // XInteractionHandler
+    virtual void SAL_CALL handle( uno::Reference< task::XInteractionRequest > const & xRequest ) override;
+
+    // XProgressHandler
+    virtual void SAL_CALL push( uno::Any const & Status ) override;
+    virtual void SAL_CALL update( uno::Any const & Status ) override;
+    virtual void SAL_CALL pop() override;
+};
+
+
+struct ExtensionCmd
+{
+    enum E_CMD_TYPE { ADD, ENABLE, DISABLE, REMOVE, CHECK_FOR_UPDATES, ACCEPT_LICENSE };
+
+    E_CMD_TYPE  m_eCmdType;
+    bool        m_bWarnUser;
+    OUString    m_sExtensionURL;
+    OUString    m_sRepository;
+    uno::Reference< deployment::XPackage > m_xPackage;
+    std::vector< uno::Reference< deployment::XPackage > >        m_vExtensionList;
+
+    ExtensionCmd( const E_CMD_TYPE eCommand,
+                  OUString aExtensionURL,
+                  OUString aRepository,
+                  const bool bWarnUser )
+        : m_eCmdType( eCommand ),
+          m_bWarnUser( bWarnUser ),
+          m_sExtensionURL(std::move( aExtensionURL )),
+          m_sRepository(std::move( aRepository )) {};
+    ExtensionCmd( const E_CMD_TYPE eCommand,
+                  uno::Reference< deployment::XPackage > xPackage )
+        : m_eCmdType( eCommand ),
+          m_bWarnUser( false ),
+          m_xPackage(std::move( xPackage )) {};
+    ExtensionCmd( const E_CMD_TYPE eCommand,
+                std::vector<uno::Reference<deployment::XPackage > >&&vExtensionList )
+        : m_eCmdType( eCommand ),
+          m_bWarnUser( false ),
+          m_vExtensionList( std::move(vExtensionList) ) {};
+};
+
+}
+
+typedef std::shared_ptr< ExtensionCmd > TExtensionCmd;
+
+
+class ExtensionCmdQueue::Thread: public salhelper::Thread
+{
+public:
+    Thread( DialogHelper *pDialogHelper,
+            TheExtensionManager *pManager,
+            uno::Reference< uno::XComponentContext > xContext );
+
+    void addExtension( const OUString &rExtensionURL,
+                       const OUString &rRepository,
+                       const bool bWarnUser );
+    void removeExtension( const uno::Reference< deployment::XPackage > &rPackage );
+    void enableExtension( const uno::Reference< deployment::XPackage > &rPackage,
+                          const bool bEnable );
+    void checkForUpdates( std::vector<uno::Reference<deployment::XPackage > > && vExtensionList );
+    void acceptLicense( const uno::Reference< deployment::XPackage > &rPackage );
+    void stop();
+    bool isBusy();
+
+private:
+    virtual ~Thread() override;
+
+    virtual void execute() override;
+
+    void _insert(const TExtensionCmd& rExtCmd);
+
+    void _addExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                        const OUString &rPackageURL,
+                        const OUString &rRepository,
+                        const bool bWarnUser );
+    void _removeExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                           const uno::Reference< deployment::XPackage > &xPackage );
+    void _enableExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                           const uno::Reference< deployment::XPackage > &xPackage );
+    void _disableExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                            const uno::Reference< deployment::XPackage > &xPackage );
+    void _checkForUpdates( std::vector<uno::Reference<deployment::XPackage > > &&vExtensionList );
+    void _acceptLicense( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                           const uno::Reference< deployment::XPackage > &xPackage );
+
+    enum Input { NONE, START, STOP };
+
+    uno::Reference< uno::XComponentContext > m_xContext;
+    std::queue< TExtensionCmd >              m_queue;
+
+    DialogHelper *m_pDialogHelper;
+    TheExtensionManager *m_pManager;
+
+    const OUString   m_sEnablingPackages;
+    const OUString   m_sDisablingPackages;
+    const OUString   m_sAddingPackages;
+    const OUString   m_sRemovingPackages;
+    const OUString   m_sDefaultCmd;
+    const OUString   m_sAcceptLicense;
+    std::condition_variable m_wakeup;
+    std::mutex       m_mutex;
+    Input            m_eInput;
+    bool             m_bStopped;
+    bool             m_bWorking;
+};
+
+
+void ProgressCmdEnv::startProgress()
+{
+    m_nCurrentProgress = 0;
+
+    if ( m_pDialogHelper )
+        m_pDialogHelper->showProgress( true );
+}
+
+
+void ProgressCmdEnv::stopProgress()
+{
+    if ( m_pDialogHelper )
+        m_pDialogHelper->showProgress( false );
+}
+
+
+void ProgressCmdEnv::progressSection( const OUString &rText,
+                                      const uno::Reference< task::XAbortChannel > &xAbortChannel )
+{
+    m_nCurrentProgress = 0;
+    if ( m_pDialogHelper )
+    {
+        m_pDialogHelper->updateProgress( rText, xAbortChannel );
+        m_pDialogHelper->updateProgress( 5 );
+    }
+}
+
+
+void ProgressCmdEnv::updateProgress()
+{
+    tools::Long nProgress = ((m_nCurrentProgress*5) % 100) + 5;
+    if ( m_pDialogHelper )
+        m_pDialogHelper->updateProgress( nProgress );
+}
+
+// XCommandEnvironment
+
+uno::Reference< task::XInteractionHandler > ProgressCmdEnv::getInteractionHandler()
+{
+    return this;
+}
+
+
+uno::Reference< ucb::XProgressHandler > ProgressCmdEnv::getProgressHandler()
+{
+    return this;
+}
+
+
+// XInteractionHandler
+
+void ProgressCmdEnv::handle( uno::Reference< task::XInteractionRequest > const & xRequest )
+{
+    uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == uno::TypeClass_EXCEPTION );
+    dp_misc::TRACE( "[dp_gui_cmdenv.cxx] incoming request:\n"
+        + ::comphelper::anyToString(request) + "\n");
+
+    lang::WrappedTargetException wtExc;
+    deployment::DependencyException depExc;
+    deployment::LicenseException licExc;
+    deployment::VersionException verExc;
+    deployment::InstallException instExc;
+    deployment::PlatformException platExc;
+
+    // selections:
+    bool approve = false;
+    bool abort = false;
+
+    if (request >>= wtExc) {
+        // handable deployment error signalled, e.g.
+        // bundle item registration failed, notify cause only:
+        uno::Any cause;
+        deployment::DeploymentException dpExc;
+        if (wtExc.TargetException >>= dpExc)
+            cause = dpExc.Cause;
+        else {
+            ucb::CommandFailedException cfExc;
+            if (wtExc.TargetException >>= cfExc)
+                cause = cfExc.Reason;
+            else
+                cause = wtExc.TargetException;
+        }
+        update_( cause );
+
+        // ignore intermediate errors of legacy packages, i.e.
+        // former pkgchk behaviour:
+        const uno::Reference< deployment::XPackage > xPackage( wtExc.Context, uno::UNO_QUERY );
+        OSL_ASSERT( xPackage.is() );
+        if ( xPackage.is() )
+        {
+            const uno::Reference< deployment::XPackageTypeInfo > xPackageType( xPackage->getPackageType() );
+            OSL_ASSERT( xPackageType.is() );
+            if (xPackageType.is())
+            {
+                approve = ( xPackage->isBundle() &&
+                            xPackageType->getMediaType().match(
+                               "application/vnd.sun.star.legacy-package-bundle" ));
+            }
+        }
+        abort = !approve;
+    }
+    else if (request >>= depExc)
+    {
+        std::vector< OUString > deps;
+        deps.reserve(depExc.UnsatisfiedDependencies.getLength());
+        for (auto const & i : std::as_const(depExc.UnsatisfiedDependencies))
+        {
+            deps.push_back( dp_misc::Dependencies::getErrorText(i) );
+        }
+        {
+            SolarMutexGuard guard;
+            if (m_pDialogHelper)
+                m_pDialogHelper->incBusy();
+            DependencyDialog aDlg(activeDialog(), deps);
+            short n = aDlg.run();
+            if (m_pDialogHelper)
+                m_pDialogHelper->decBusy();
+            // Distinguish between closing the dialog and programmatically
+            // canceling the dialog (headless VCL):
+            approve = n == RET_OK
+                || (n == RET_CANCEL && !Application::IsDialogCancelEnabled());
+        }
+    }
+    else if (request >>= licExc)
+    {
+        SolarMutexGuard guard;
+
+        weld::Window *pTopLevel = activeDialog();
+        if (m_pDialogHelper)
+            m_pDialogHelper->incBusy();
+        uno::Reference< ui::dialogs::XExecutableDialog > xDialog(
+            deployment::ui::LicenseDialog::create(
+            m_xContext, pTopLevel ? pTopLevel->GetXWindow() : nullptr,
+            licExc.ExtensionName, licExc.Text ) );
+        sal_Int16 res = xDialog->execute();
+        if (m_pDialogHelper)
+            m_pDialogHelper->decBusy();
+        if ( res == ui::dialogs::ExecutableDialogResults::CANCEL )
+            abort = true;
+        else if ( res == ui::dialogs::ExecutableDialogResults::OK )
+            approve = true;
+        else
+        {
+            OSL_ASSERT(false);
+        }
+    }
+    else if (request >>= verExc)
+    {
+        TranslateId id;
+        switch (dp_misc::compareVersions(
+                    verExc.NewVersion, verExc.Deployed->getVersion() ))
+        {
+        case dp_misc::LESS:
+            id = RID_STR_WARNING_VERSION_LESS;
+            break;
+        case dp_misc::EQUAL:
+            id = RID_STR_WARNING_VERSION_EQUAL;
+            break;
+        default: // dp_misc::GREATER
+            id = RID_STR_WARNING_VERSION_GREATER;
+            break;
+        }
+        OSL_ASSERT( verExc.Deployed.is() );
+        bool bEqualNames = verExc.NewDisplayName ==
+            verExc.Deployed->getDisplayName();
+        {
+            SolarMutexGuard guard;
+
+            if (m_pDialogHelper)
+                m_pDialogHelper->incBusy();
+
+            std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(activeDialog(),
+                                                      VclMessageType::Warning, VclButtonsType::OkCancel, DpResId(id)));
+            OUString s;
+            if (bEqualNames)
+            {
+                s = xBox->get_primary_text();
+            }
+            else if (id != RID_STR_WARNING_VERSION_EQUAL)
+            {
+                //hypothetical: requires two instances of an extension with the same
+                //version to have different display names. Probably the developer forgot
+                //to change the version.
+                s = DpResId(RID_STR_WARNINGBOX_VERSION_EQUAL_DIFFERENT_NAMES);
+            }
+            else if (id != RID_STR_WARNING_VERSION_LESS)
+            {
+                s = DpResId(RID_STR_WARNINGBOX_VERSION_LESS_DIFFERENT_NAMES);
+            }
+            else if (id != RID_STR_WARNING_VERSION_GREATER)
+            {
+               s = DpResId(RID_STR_WARNINGBOX_VERSION_GREATER_DIFFERENT_NAMES);
+            }
+            s = s.replaceAll("$NAME", verExc.NewDisplayName);
+            s = s.replaceAll("$OLDNAME", verExc.Deployed->getDisplayName());
+            s = s.replaceAll("$NEW", getVersion(verExc.NewVersion));
+            s = s.replaceAll("$DEPLOYED", getVersion(verExc.Deployed));
+            xBox->set_primary_text(s);
+            approve = xBox->run() == RET_OK;
+            if (m_pDialogHelper)
+                m_pDialogHelper->decBusy();
+            abort = !approve;
+        }
+    }
+    else if (request >>= instExc)
+    {
+        if ( ! m_bWarnUser )
+        {
+            approve = true;
+        }
+        else
+        {
+            if ( m_pDialogHelper )
+            {
+                SolarMutexGuard guard;
+
+                approve = m_pDialogHelper->installExtensionWarn( instExc.displayName );
+            }
+            else
+                approve = false;
+            abort = !approve;
+        }
+    }
+    else if (request >>= platExc)
+    {
+        SolarMutexGuard guard;
+        OUString sMsg(DpResId(RID_STR_UNSUPPORTED_PLATFORM));
+        sMsg = sMsg.replaceAll("%Name", platExc.package->getDisplayName());
+        if (m_pDialogHelper)
+            m_pDialogHelper->incBusy();
+        std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(activeDialog(),
+                                                  VclMessageType::Warning, VclButtonsType::Ok, sMsg));
+        xBox->run();
+        if (m_pDialogHelper)
+            m_pDialogHelper->decBusy();
+        approve = true;
+    }
+
+    if (!approve && !abort)
+    {
+        // forward to UUI handler:
+        if (! m_xHandler.is()) {
+            // late init:
+            m_xHandler = task::InteractionHandler::createWithParentAndContext(m_xContext, nullptr, m_sTitle);
+        }
+        m_xHandler->handle( xRequest );
+    }
+    else
+    {
+        // select:
+        uno::Sequence< uno::Reference< task::XInteractionContinuation > > conts(
+            xRequest->getContinuations() );
+        uno::Reference< task::XInteractionContinuation > const * pConts = conts.getConstArray();
+        sal_Int32 len = conts.getLength();
+        for ( sal_Int32 pos = 0; pos < len; ++pos )
+        {
+            if (approve) {
+                uno::Reference< task::XInteractionApprove > xInteractionApprove( pConts[ pos ], uno::UNO_QUERY );
+                if (xInteractionApprove.is()) {
+                    xInteractionApprove->select();
+                    // don't query again for ongoing continuations:
+                    approve = false;
+                }
+            }
+            else if (abort) {
+                uno::Reference< task::XInteractionAbort > xInteractionAbort( pConts[ pos ], uno::UNO_QUERY );
+                if (xInteractionAbort.is()) {
+                    xInteractionAbort->select();
+                    // don't query again for ongoing continuations:
+                    abort = false;
+                }
+            }
+        }
+    }
+}
+
+
+// XProgressHandler
+
+void ProgressCmdEnv::push( uno::Any const & rStatus )
+{
+    update_( rStatus );
+}
+
+
+void ProgressCmdEnv::update_( uno::Any const & rStatus )
+{
+    OUString text;
+    if ( rStatus.hasValue() && !( rStatus >>= text) )
+    {
+        if ( auto e = o3tl::tryAccess<uno::Exception>(rStatus) )
+            text = e->Message;
+        if ( text.isEmpty() )
+            text = ::comphelper::anyToString( rStatus ); // fallback
+
+        const SolarMutexGuard aGuard;
+        if (m_pDialogHelper)
+            m_pDialogHelper->incBusy();
+        std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(activeDialog(),
+                                                  VclMessageType::Warning, VclButtonsType::Ok, text));
+        xBox->run();
+        if (m_pDialogHelper)
+            m_pDialogHelper->decBusy();
+    }
+    ++m_nCurrentProgress;
+    updateProgress();
+}
+
+
+void ProgressCmdEnv::update( uno::Any const & rStatus )
+{
+    update_( rStatus );
+}
+
+
+void ProgressCmdEnv::pop()
+{
+    update_( uno::Any() ); // no message
+}
+
+
+ExtensionCmdQueue::Thread::Thread( DialogHelper *pDialogHelper,
+                                   TheExtensionManager *pManager,
+                                   uno::Reference< uno::XComponentContext > xContext ) :
+    salhelper::Thread( "dp_gui_extensioncmdqueue" ),
+    m_xContext(std::move( xContext )),
+    m_pDialogHelper( pDialogHelper ),
+    m_pManager( pManager ),
+    m_sEnablingPackages( DpResId( RID_STR_ENABLING_PACKAGES ) ),
+    m_sDisablingPackages( DpResId( RID_STR_DISABLING_PACKAGES ) ),
+    m_sAddingPackages( DpResId( RID_STR_ADDING_PACKAGES ) ),
+    m_sRemovingPackages( DpResId( RID_STR_REMOVING_PACKAGES ) ),
+    m_sDefaultCmd( DpResId( RID_STR_ADD_PACKAGES ) ),
+    m_sAcceptLicense( DpResId( RID_STR_ACCEPT_LICENSE ) ),
+    m_eInput( NONE ),
+    m_bStopped( false ),
+    m_bWorking( false )
+{
+    OSL_ASSERT( pDialogHelper );
+}
+
+
+void ExtensionCmdQueue::Thread::addExtension( const OUString &rExtensionURL,
+                                              const OUString &rRepository,
+                                              const bool bWarnUser )
+{
+    if ( !rExtensionURL.isEmpty() )
+    {
+        TExtensionCmd pEntry = std::make_shared<ExtensionCmd>( ExtensionCmd::ADD, rExtensionURL, rRepository, bWarnUser );
+        _insert( pEntry );
+    }
+}
+
+
+void ExtensionCmdQueue::Thread::removeExtension( const uno::Reference< deployment::XPackage > &rPackage )
+{
+    if ( rPackage.is() )
+    {
+        TExtensionCmd pEntry = std::make_shared<ExtensionCmd>( ExtensionCmd::REMOVE, rPackage );
+        _insert( pEntry );
+    }
+}
+
+
+void ExtensionCmdQueue::Thread::acceptLicense( const uno::Reference< deployment::XPackage > &rPackage )
+{
+    if ( rPackage.is() )
+    {
+        TExtensionCmd pEntry = std::make_shared<ExtensionCmd>( ExtensionCmd::ACCEPT_LICENSE, rPackage );
+        _insert( pEntry );
+    }
+}
+
+
+void ExtensionCmdQueue::Thread::enableExtension( const uno::Reference< deployment::XPackage > &rPackage,
+                                                 const bool bEnable )
+{
+    if ( rPackage.is() )
+    {
+        TExtensionCmd pEntry = std::make_shared<ExtensionCmd>( bEnable ? ExtensionCmd::ENABLE :
+                                                          ExtensionCmd::DISABLE,
+                                                rPackage );
+        _insert( pEntry );
+    }
+}
+
+
+void ExtensionCmdQueue::Thread::checkForUpdates(
+    std::vector<uno::Reference<deployment::XPackage > > && vExtensionList )
+{
+    TExtensionCmd pEntry = std::make_shared<ExtensionCmd>( ExtensionCmd::CHECK_FOR_UPDATES, std::move(vExtensionList) );
+    _insert( pEntry );
+}
+
+
+//Stopping this thread will not abort the installation of extensions.
+void ExtensionCmdQueue::Thread::stop()
+{
+    std::scoped_lock aGuard( m_mutex );
+    m_bStopped = true;
+    m_eInput = STOP;
+    m_wakeup.notify_all();
+}
+
+
+bool ExtensionCmdQueue::Thread::isBusy()
+{
+    std::scoped_lock aGuard( m_mutex );
+    return m_bWorking;
+}
+
+
+ExtensionCmdQueue::Thread::~Thread() {}
+
+
+void ExtensionCmdQueue::Thread::execute()
+{
+#ifdef _WIN32
+    //Needed for use of the service "com.sun.star.system.SystemShellExecute" in
+    //DialogHelper::openWebBrowser
+    int nNbCallCoInitializeExForReinit = 0;
+    o3tl::safeCoInitializeEx(COINIT_APARTMENTTHREADED, nNbCallCoInitializeExForReinit);
+#endif
+    for (;;)
+    {
+        int nSize;
+        Input eInput;
+        {
+            std::unique_lock aGuard( m_mutex );
+            while (m_eInput == NONE) {
+                m_wakeup.wait(aGuard);
+            }
+            eInput = m_eInput;
+            m_eInput = NONE;
+            nSize = m_queue.size();
+            // coverity[missing_lock: FALSE] - maybe due to (by-design) unique_lock vs. scoped_lock?
+            m_bWorking = false;
+        }
+
+        if ( eInput == STOP )
+            break;
+
+        // We only install the extension which are currently in the queue.
+        // The progressbar will be set to show the progress of the current number
+        // of extensions. If we allowed to add extensions now then the progressbar may
+        // have reached the end while we still install newly added extensions.
+        if ( nSize == 0 )
+            continue;
+
+        ::rtl::Reference< ProgressCmdEnv > currentCmdEnv( new ProgressCmdEnv( m_xContext, m_pDialogHelper, m_sDefaultCmd ) );
+
+        // Do not lock the following part with addExtension. addExtension may be called in the main thread.
+        // If the message box "Do you want to install the extension (or similar)" is shown and then
+        // addExtension is called, which then blocks the main thread, then we deadlock.
+        bool bStartProgress = true;
+
+        while ( --nSize >= 0 )
+        {
+            {
+                std::scoped_lock aGuard( m_mutex );
+                m_bWorking = true;
+            }
+
+            try
+            {
+                TExtensionCmd pEntry;
+                {
+                    std::scoped_lock queueGuard( m_mutex );
+                    pEntry = m_queue.front();
+                    m_queue.pop();
+                }
+
+                if ( bStartProgress && ( pEntry->m_eCmdType != ExtensionCmd::CHECK_FOR_UPDATES ) )
+                {
+                    currentCmdEnv->startProgress();
+                    bStartProgress = false;
+                }
+
+                switch ( pEntry->m_eCmdType ) {
+                case ExtensionCmd::ADD :
+                    _addExtension( currentCmdEnv, pEntry->m_sExtensionURL, pEntry->m_sRepository, pEntry->m_bWarnUser );
+                    break;
+                case ExtensionCmd::REMOVE :
+                    _removeExtension( currentCmdEnv, pEntry->m_xPackage );
+                    break;
+                case ExtensionCmd::ENABLE :
+                    _enableExtension( currentCmdEnv, pEntry->m_xPackage );
+                    break;
+                case ExtensionCmd::DISABLE :
+                    _disableExtension( currentCmdEnv, pEntry->m_xPackage );
+                    break;
+                case ExtensionCmd::CHECK_FOR_UPDATES :
+                    _checkForUpdates( std::vector(pEntry->m_vExtensionList) );
+                    break;
+                case ExtensionCmd::ACCEPT_LICENSE :
+                    _acceptLicense( currentCmdEnv, pEntry->m_xPackage );
+                    break;
+                }
+            }
+            catch ( const ucb::CommandAbortedException & )
+            {
+                //This exception is thrown when the user clicks cancel on the progressbar.
+                //Then we cancel the installation of all extensions and remove them from
+                //the queue.
+                {
+                    std::scoped_lock queueGuard2(m_mutex);
+                    while ( --nSize >= 0 )
+                        m_queue.pop();
+                }
+                break;
+            }
+            catch ( const ucb::CommandFailedException & )
+            {
+                //This exception is thrown when a user clicked cancel in the messagebox which was
+                //started by the interaction handler. For example the user will be asked if he/she
+                //really wants to install the extension.
+                //These interactions run for exactly one extension at a time. Therefore we continue
+                //with installing the remaining extensions.
+                continue;
+            }
+            catch ( const uno::Exception & )
+            {
+                //Todo display the user an error
+                //see also DialogImpl::SyncPushButton::Click()
+                uno::Any exc( ::cppu::getCaughtException() );
+                OUString msg;
+                deployment::DeploymentException dpExc;
+                if (exc >>= dpExc)
+                {
+                    if (auto e = o3tl::tryAccess<uno::Exception>(dpExc.Cause))
+                    {
+                        // notify error cause only:
+                        msg = e->Message;
+                    }
+                }
+                if (msg.isEmpty()) // fallback for debugging purposes
+                    msg = ::comphelper::anyToString(exc);
+
+                const SolarMutexGuard guard;
+                if (m_pDialogHelper)
+                    m_pDialogHelper->incBusy();
+
+                std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(currentCmdEnv->activeDialog(),
+                                                          VclMessageType::Warning, VclButtonsType::Ok, msg));
+                if (m_pDialogHelper)
+                    xBox->set_title(m_pDialogHelper->getFrameWeld()->get_title());
+                xBox->run();
+                if (m_pDialogHelper)
+                    m_pDialogHelper->decBusy();
+                //Continue with installation of the remaining extensions
+            }
+            {
+                std::scoped_lock aGuard( m_mutex );
+                m_bWorking = false;
+            }
+        }
+
+        {
+            // when leaving the while loop with break, we should set working to false, too
+            std::scoped_lock aGuard( m_mutex );
+            m_bWorking = false;
+        }
+
+        if ( !bStartProgress )
+            currentCmdEnv->stopProgress();
+    }
+    //end for
+#ifdef _WIN32
+    o3tl::safeCoUninitializeReinit(COINIT_MULTITHREADED, nNbCallCoInitializeExForReinit);
+#endif
+}
+
+
+void ExtensionCmdQueue::Thread::_addExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                                               const OUString &rPackageURL,
+                                               const OUString &rRepository,
+                                               const bool bWarnUser )
+{
+    //check if we have a string in anyTitle. For example "unopkg gui \" caused anyTitle to be void
+    //and anyTitle.get<OUString> throws as RuntimeException.
+    uno::Any anyTitle;
+    try
+    {
+        anyTitle = ::ucbhelper::Content( rPackageURL, rCmdEnv, m_xContext ).getPropertyValue( "Title" );
+    }
+    catch ( const uno::Exception & )
+    {
+        return;
+    }
+
+    OUString sName;
+    if ( ! (anyTitle >>= sName) )
+    {
+        OSL_FAIL("Could not get file name for extension.");
+        return;
+    }
+
+    rCmdEnv->setWarnUser( bWarnUser );
+    uno::Reference< deployment::XExtensionManager > xExtMgr = m_pManager->getExtensionManager();
+    uno::Reference< task::XAbortChannel > xAbortChannel( xExtMgr->createAbortChannel() );
+    OUString sTitle(
+        m_sAddingPackages.replaceAll("%EXTENSION_NAME", sName));
+    rCmdEnv->progressSection( sTitle, xAbortChannel );
+
+    try
+    {
+        xExtMgr->addExtension(rPackageURL, uno::Sequence<beans::NamedValue>(),
+                              rRepository, xAbortChannel, rCmdEnv );
+    }
+    catch ( const ucb::CommandFailedException & )
+    {
+        // When the extension is already installed we'll get a dialog asking if we want to overwrite. If we then press
+        // cancel this exception is thrown.
+    }
+    catch ( const ucb::CommandAbortedException & )
+    {
+        // User clicked the cancel button
+        // TODO: handle cancel
+    }
+    rCmdEnv->setWarnUser( false );
+}
+
+
+void ExtensionCmdQueue::Thread::_removeExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                                                  const uno::Reference< deployment::XPackage > &xPackage )
+{
+    uno::Reference< deployment::XExtensionManager > xExtMgr = m_pManager->getExtensionManager();
+    uno::Reference< task::XAbortChannel > xAbortChannel( xExtMgr->createAbortChannel() );
+    OUString sTitle(
+        m_sRemovingPackages.replaceAll("%EXTENSION_NAME",
+            xPackage->getDisplayName()));
+    rCmdEnv->progressSection( sTitle, xAbortChannel );
+
+    OUString id( dp_misc::getIdentifier( xPackage ) );
+    try
+    {
+        xExtMgr->removeExtension( id, xPackage->getName(), xPackage->getRepositoryName(), xAbortChannel, rCmdEnv );
+    }
+    catch ( const deployment::DeploymentException & )
+    {}
+    catch ( const ucb::CommandFailedException & )
+    {}
+    catch ( const ucb::CommandAbortedException & )
+    {}
+
+    // Check, if there are still updates to be notified via menu bar icon
+    uno::Sequence< uno::Sequence< OUString > > aItemList;
+    UpdateDialog::createNotifyJob( false, aItemList );
+}
+
+
+void ExtensionCmdQueue::Thread::_checkForUpdates(
+    std::vector<uno::Reference<deployment::XPackage > > && vExtensionList )
+{
+    const SolarMutexGuard guard;
+
+    if (m_pDialogHelper)
+        m_pDialogHelper->incBusy();
+
+    std::vector< UpdateData > vData;
+    UpdateDialog aUpdateDialog(m_xContext, m_pDialogHelper ? m_pDialogHelper->getFrameWeld() : nullptr, std::move(vExtensionList), &vData);
+
+    aUpdateDialog.notifyMenubar( true, false ); // prepare the checking, if there updates to be notified via menu bar icon
+
+    bool bOk = aUpdateDialog.run() == RET_OK;
+    if (m_pDialogHelper)
+        m_pDialogHelper->decBusy();
+
+    if (bOk && !vData.empty())
+    {
+        // If there is at least one directly downloadable extension then we
+        // open the install dialog.
+        std::vector< UpdateData > dataDownload;
+
+        for (auto const& data : vData)
+        {
+            if ( data.sWebsiteURL.isEmpty() )
+                dataDownload.push_back(data);
+        }
+
+        short nDialogResult = RET_OK;
+        if ( !dataDownload.empty() )
+        {
+            if (m_pDialogHelper)
+                m_pDialogHelper->incBusy();
+            UpdateInstallDialog aDlg(m_pDialogHelper ? m_pDialogHelper->getFrameWeld() : nullptr, dataDownload, m_xContext);
+            nDialogResult = aDlg.run();
+            if (m_pDialogHelper)
+                m_pDialogHelper->decBusy();
+            aUpdateDialog.notifyMenubar( false, true ); // Check, if there are still pending updates to be notified via menu bar icon
+        }
+        else
+            aUpdateDialog.notifyMenubar( false, false ); // Check, if there are pending updates to be notified via menu bar icon
+
+        //Now start the webbrowser and navigate to the websites where we get the updates
+        if ( RET_OK == nDialogResult )
+        {
+            for (auto const& data : vData)
+            {
+                if ( m_pDialogHelper && ( !data.sWebsiteURL.isEmpty() ) )
+                    m_pDialogHelper->openWebBrowser( data.sWebsiteURL, m_pDialogHelper->getFrameWeld()->get_title() );
+            }
+        }
+    }
+    else
+        aUpdateDialog.notifyMenubar( false, false ); // check if there updates to be notified via menu bar icon
+}
+
+
+void ExtensionCmdQueue::Thread::_enableExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                                                  const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return;
+
+    uno::Reference< deployment::XExtensionManager > xExtMgr = m_pManager->getExtensionManager();
+    uno::Reference< task::XAbortChannel > xAbortChannel( xExtMgr->createAbortChannel() );
+    OUString sTitle(
+        m_sEnablingPackages.replaceAll("%EXTENSION_NAME",
+            xPackage->getDisplayName()));
+    rCmdEnv->progressSection( sTitle, xAbortChannel );
+
+    try
+    {
+        xExtMgr->enableExtension( xPackage, xAbortChannel, rCmdEnv );
+        if ( m_pDialogHelper )
+            m_pDialogHelper->updatePackageInfo( xPackage );
+    }
+    catch ( const ::ucb::CommandAbortedException & )
+    {}
+}
+
+
+void ExtensionCmdQueue::Thread::_disableExtension( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                                                   const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return;
+
+    uno::Reference< deployment::XExtensionManager > xExtMgr = m_pManager->getExtensionManager();
+    uno::Reference< task::XAbortChannel > xAbortChannel( xExtMgr->createAbortChannel() );
+    OUString sTitle(
+        m_sDisablingPackages.replaceAll("%EXTENSION_NAME",
+            xPackage->getDisplayName()));
+    rCmdEnv->progressSection( sTitle, xAbortChannel );
+
+    try
+    {
+        xExtMgr->disableExtension( xPackage, xAbortChannel, rCmdEnv );
+        if ( m_pDialogHelper )
+            m_pDialogHelper->updatePackageInfo( xPackage );
+    }
+    catch ( const ::ucb::CommandAbortedException & )
+    {}
+}
+
+
+void ExtensionCmdQueue::Thread::_acceptLicense( ::rtl::Reference< ProgressCmdEnv > const &rCmdEnv,
+                                                const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if ( !xPackage.is() )
+        return;
+
+    uno::Reference< deployment::XExtensionManager > xExtMgr = m_pManager->getExtensionManager();
+    uno::Reference< task::XAbortChannel > xAbortChannel( xExtMgr->createAbortChannel() );
+    OUString sTitle(
+        m_sAcceptLicense.replaceAll("%EXTENSION_NAME",
+            xPackage->getDisplayName()));
+    rCmdEnv->progressSection( sTitle, xAbortChannel );
+
+    try
+    {
+        xExtMgr->checkPrerequisitesAndEnable( xPackage, xAbortChannel, rCmdEnv );
+        if ( m_pDialogHelper )
+            m_pDialogHelper->updatePackageInfo( xPackage );
+    }
+    catch ( const ::ucb::CommandAbortedException & )
+    {}
+}
+
+void ExtensionCmdQueue::Thread::_insert(const TExtensionCmd& rExtCmd)
+{
+    std::scoped_lock aGuard( m_mutex );
+
+    // If someone called stop then we do not process the command -> game over!
+    if ( m_bStopped )
+        return;
+
+    m_queue.push( rExtCmd );
+    m_eInput = START;
+    m_wakeup.notify_all();
+}
+
+
+ExtensionCmdQueue::ExtensionCmdQueue( DialogHelper * pDialogHelper,
+                                      TheExtensionManager *pManager,
+                                      const uno::Reference< uno::XComponentContext > &rContext )
+  : m_thread( new Thread( pDialogHelper, pManager, rContext ) )
+{
+    m_thread->launch();
+}
+
+ExtensionCmdQueue::~ExtensionCmdQueue() {
+    m_thread->stop();
+    m_thread->join();
+}
+
+void ExtensionCmdQueue::addExtension( const OUString & extensionURL,
+                                      const OUString & repository,
+                                      const bool bWarnUser )
+{
+    m_thread->addExtension( extensionURL, repository, bWarnUser );
+}
+
+void ExtensionCmdQueue::removeExtension( const uno::Reference< deployment::XPackage > &rPackage )
+{
+    m_thread->removeExtension( rPackage );
+}
+
+void ExtensionCmdQueue::enableExtension( const uno::Reference< deployment::XPackage > &rPackage,
+                                         const bool bEnable )
+{
+    m_thread->enableExtension( rPackage, bEnable );
+}
+
+void ExtensionCmdQueue::checkForUpdates( std::vector<uno::Reference<deployment::XPackage > > && vExtensionList )
+{
+    m_thread->checkForUpdates( std::move(vExtensionList) );
+}
+
+void ExtensionCmdQueue::acceptLicense( const uno::Reference< deployment::XPackage > &rPackage )
+{
+    m_thread->acceptLicense( rPackage );
+}
+
+void ExtensionCmdQueue::syncRepositories( const uno::Reference< uno::XComponentContext > &xContext )
+{
+    dp_misc::syncRepositories( false, new ProgressCmdEnv( xContext, nullptr, "Extension Manager" ) );
+}
+
+bool ExtensionCmdQueue::isBusy()
+{
+    return m_thread->isBusy();
+}
+
+void handleInteractionRequest( const uno::Reference< uno::XComponentContext > & xContext,
+                               const uno::Reference< task::XInteractionRequest > & xRequest )
+{
+    ::rtl::Reference< ProgressCmdEnv > xCmdEnv( new ProgressCmdEnv( xContext, nullptr, "Extension Manager" ) );
+    xCmdEnv->handle( xRequest );
+}
+
+} //namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.hxx b/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.hxx
new file mode 100644
index 000000000..3703d1e8c
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_extensioncmdqueue.hxx
@@ -0,0 +1,94 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <rtl/ref.hxx>
+
+#include <vector>
+
+#include "dp_gui_updatedata.hxx"
+
+/// @HTML
+
+namespace com::sun::star {
+    namespace task { class XInteractionRequest; }
+    namespace uno { class XComponentContext; }
+}
+
+namespace dp_gui {
+
+class DialogHelper;
+class TheExtensionManager;
+
+/**
+   Manages installing of extensions in the GUI mode. Requests for installing
+   Extensions can be asynchronous. For example, the Extension Manager is running
+   in an office process and someone uses the system integration to install an Extension.
+   That is, the user double clicks an extension symbol in a file browser, which then
+   causes an invocation of "unopkg gui ext". When at that time the Extension Manager
+   already performs a task, triggered by the user (for example, add, update, disable,
+   enable) then adding of the extension will be postponed until the user has finished
+   the task.
+
+   This class also ensures that the extensions are not installed in the main thread.
+   Doing so would cause a deadlock because of the progress bar which needs to be constantly
+   updated.
+*/
+class ExtensionCmdQueue {
+
+public:
+    /**
+       Create an instance.
+    */
+    ExtensionCmdQueue( DialogHelper * pDialogHelper,
+                       TheExtensionManager *pManager,
+                       const css::uno::Reference< css::uno::XComponentContext > & rContext);
+
+    ~ExtensionCmdQueue();
+
+    void addExtension( const OUString &rExtensionURL,
+                       const OUString &rRepository,
+                       const bool bWarnUser );
+    void removeExtension( const css::uno::Reference< css::deployment::XPackage > &rPackage );
+    void enableExtension( const css::uno::Reference< css::deployment::XPackage > &rPackage,
+                          const bool bEnable );
+    void checkForUpdates( std::vector< css::uno::Reference< css::deployment::XPackage > > && vList );
+    void acceptLicense( const css::uno::Reference< css::deployment::XPackage > &rPackage );
+    static void syncRepositories( const css::uno::Reference< css::uno::XComponentContext > & xContext );
+
+    bool isBusy();
+private:
+    ExtensionCmdQueue(ExtensionCmdQueue const &) = delete;
+    ExtensionCmdQueue& operator =(ExtensionCmdQueue const &) = delete;
+
+    class Thread;
+
+    rtl::Reference< Thread > m_thread;
+};
+
+void handleInteractionRequest( const css::uno::Reference< css::uno::XComponentContext > & xContext,
+                               const css::uno::Reference< css::task::XInteractionRequest > & xRequest );
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_extlistbox.cxx b/desktop/source/deployment/gui/dp_gui_extlistbox.cxx
new file mode 100644
index 000000000..d30d24f79
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_extlistbox.cxx
@@ -0,0 +1,1144 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <dp_shared.hxx>
+#include <strings.hrc>
+#include "dp_gui.h"
+#include "dp_gui_extlistbox.hxx"
+#include "dp_gui_theextmgr.hxx"
+#include <dp_dependencies.hxx>
+#include <bitmaps.hlst>
+
+#include <comphelper/processfactory.hxx>
+#include <com/sun/star/i18n/CollatorOptions.hpp>
+#include <com/sun/star/deployment/DependencyException.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionRemovedException.hpp>
+#include <com/sun/star/system/XSystemShellExecute.hpp>
+#include <com/sun/star/system/SystemShellExecuteFlags.hpp>
+#include <com/sun/star/system/SystemShellExecute.hpp>
+#include <cppuhelper/weakref.hxx>
+#include <i18nlangtag/languagetag.hxx>
+#include <o3tl/safeint.hxx>
+#include <osl/diagnose.h>
+#include <rtl/ustrbuf.hxx>
+#include <utility>
+#include <vcl/event.hxx>
+#include <vcl/ptrstyle.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/settings.hxx>
+#include <vcl/weldutils.hxx>
+#include <algorithm>
+
+constexpr OUStringLiteral USER_PACKAGE_MANAGER = u"user";
+constexpr OUStringLiteral SHARED_PACKAGE_MANAGER = u"shared";
+
+using namespace ::com::sun::star;
+
+namespace dp_gui {
+
+namespace {
+
+struct FindWeakRef
+{
+    const uno::Reference<deployment::XPackage> m_extension;
+
+    explicit FindWeakRef( uno::Reference<deployment::XPackage> ext): m_extension(std::move(ext)) {}
+    bool operator () (uno::WeakReference< deployment::XPackage >  const & ref);
+};
+
+bool FindWeakRef::operator () (uno::WeakReference< deployment::XPackage >  const & ref)
+{
+    const uno::Reference<deployment::XPackage> ext(ref);
+    return ext == m_extension;
+}
+
+} // end namespace
+
+//                          struct Entry_Impl
+
+Entry_Impl::Entry_Impl( const uno::Reference< deployment::XPackage > &xPackage,
+                        const PackageState eState, const bool bReadOnly ) :
+    m_bActive( false ),
+    m_bLocked( bReadOnly ),
+    m_bHasOptions( false ),
+    m_bUser( false ),
+    m_bShared( false ),
+    m_bNew( false ),
+    m_bChecked( false ),
+    m_bMissingDeps( false ),
+    m_bHasButtons( false ),
+    m_bMissingLic( false ),
+    m_eState( eState ),
+    m_xPackage( xPackage )
+{
+    try
+    {
+        m_sTitle = xPackage->getDisplayName();
+        m_sVersion = xPackage->getVersion();
+        m_sDescription = xPackage->getDescription();
+        m_sLicenseText = xPackage->getLicenseText();
+
+        beans::StringPair aInfo( m_xPackage->getPublisherInfo() );
+        m_sPublisher = aInfo.First;
+        m_sPublisherURL = aInfo.Second;
+
+        // get the icons for the package if there are any
+        uno::Reference< graphic::XGraphic > xGraphic = xPackage->getIcon( false );
+        if ( xGraphic.is() )
+            m_aIcon = Image( xGraphic );
+
+        if ( eState == AMBIGUOUS )
+            m_sErrorText = DpResId( RID_STR_ERROR_UNKNOWN_STATUS );
+        else if ( eState == NOT_REGISTERED )
+            checkDependencies();
+    }
+    catch (const deployment::ExtensionRemovedException &) {}
+    catch (const uno::RuntimeException &) {}
+}
+
+
+Entry_Impl::~Entry_Impl()
+{}
+
+
+sal_Int32 Entry_Impl::CompareTo( const CollatorWrapper *pCollator, const TEntry_Impl& rEntry ) const
+{
+    sal_Int32 eCompare = pCollator->compareString( m_sTitle, rEntry->m_sTitle );
+    if ( eCompare == 0 )
+    {
+        eCompare = m_sVersion.compareTo( rEntry->m_sVersion );
+        if ( eCompare == 0 )
+        {
+            sal_Int32 nCompare = m_xPackage->getRepositoryName().compareTo( rEntry->m_xPackage->getRepositoryName() );
+            if ( nCompare < 0 )
+                eCompare = -1;
+            else if ( nCompare > 0 )
+                eCompare = 1;
+        }
+    }
+    return eCompare;
+}
+
+
+void Entry_Impl::checkDependencies()
+{
+    try {
+        m_xPackage->checkDependencies( uno::Reference< ucb::XCommandEnvironment >() );
+    }
+    catch ( const deployment::DeploymentException &e )
+    {
+        deployment::DependencyException depExc;
+        if ( e.Cause >>= depExc )
+        {
+            OUStringBuffer aMissingDep( DpResId( RID_STR_ERROR_MISSING_DEPENDENCIES ) );
+            for ( const auto& i : std::as_const(depExc.UnsatisfiedDependencies) )
+            {
+                aMissingDep.append("\n");
+                aMissingDep.append(dp_misc::Dependencies::getErrorText(i));
+            }
+            aMissingDep.append("\n");
+            m_sErrorText = aMissingDep.makeStringAndClear();
+            m_bMissingDeps = true;
+        }
+    }
+}
+
+// ExtensionRemovedListener
+
+void ExtensionRemovedListener::disposing( lang::EventObject const & rEvt )
+{
+    uno::Reference< deployment::XPackage > xPackage( rEvt.Source, uno::UNO_QUERY );
+
+    if ( xPackage.is() )
+    {
+        m_pParent->removeEntry( xPackage );
+    }
+}
+
+
+ExtensionRemovedListener::~ExtensionRemovedListener()
+{
+}
+
+
+// ExtensionBox_Impl
+ExtensionBox_Impl::ExtensionBox_Impl(std::unique_ptr<weld::ScrolledWindow> xScroll)
+    : m_bHasScrollBar( false )
+    , m_bHasActive( false )
+    , m_bNeedsRecalc( true )
+    , m_bInCheckMode( false )
+    , m_bAdjustActive( false )
+    , m_bInDelete( false )
+    , m_nActive( 0 )
+    , m_nTopIndex( 0 )
+    , m_nStdHeight( 0 )
+    , m_nActiveHeight( 0 )
+    , m_aSharedImage(StockImage::Yes, RID_BMP_SHARED)
+    , m_aLockedImage(StockImage::Yes, RID_BMP_LOCKED)
+    , m_aWarningImage(StockImage::Yes, RID_BMP_WARNING)
+    , m_aDefaultImage(StockImage::Yes, RID_BMP_EXTENSION)
+    , m_pManager( nullptr )
+    , m_xScrollBar(std::move(xScroll))
+{
+}
+
+void ExtensionBox_Impl::Init()
+{
+    m_xScrollBar->connect_vadjustment_changed( LINK( this, ExtensionBox_Impl, ScrollHdl ) );
+
+    auto nIconHeight = 2*TOP_OFFSET + SMALL_ICON_SIZE;
+    auto nTitleHeight = 2*TOP_OFFSET + GetTextHeight();
+    if ( nIconHeight < nTitleHeight )
+        m_nStdHeight = nTitleHeight;
+    else
+        m_nStdHeight = nIconHeight;
+    m_nStdHeight += GetTextHeight() + TOP_OFFSET;
+
+    nIconHeight = ICON_HEIGHT + 2*TOP_OFFSET + 1;
+    if ( m_nStdHeight < nIconHeight )
+        m_nStdHeight = nIconHeight;
+
+    m_nActiveHeight = m_nStdHeight;
+
+    m_xRemoveListener = new ExtensionRemovedListener( this );
+
+    m_pLocale.reset( new lang::Locale( Application::GetSettings().GetLanguageTag().getLocale() ) );
+    m_pCollator.reset( new CollatorWrapper( ::comphelper::getProcessComponentContext() ) );
+    m_pCollator->loadDefaultCollator( *m_pLocale, i18n::CollatorOptions::CollatorOptions_IGNORE_CASE );
+}
+
+ExtensionBox_Impl::~ExtensionBox_Impl()
+{
+    if ( ! m_bInDelete )
+        DeleteRemoved();
+
+    m_bInDelete = true;
+
+    for (auto const& entry : m_vEntries)
+    {
+        entry->m_xPackage->removeEventListener( m_xRemoveListener );
+    }
+
+    m_vEntries.clear();
+
+    m_xRemoveListener.clear();
+
+    m_pLocale.reset();
+    m_pCollator.reset();
+}
+
+sal_Int32 ExtensionBox_Impl::getItemCount() const
+{
+    return static_cast< sal_Int32 >( m_vEntries.size() );
+}
+
+
+sal_Int32 ExtensionBox_Impl::getSelIndex() const
+{
+    if ( m_bHasActive )
+    {
+        OSL_ASSERT( m_nActive >= -1);
+        return static_cast< sal_Int32 >( m_nActive );
+    }
+    else
+        return ENTRY_NOTFOUND;
+}
+
+
+// Title + description
+void ExtensionBox_Impl::CalcActiveHeight( const tools::Long nPos )
+{
+    const ::osl::MutexGuard aGuard( m_entriesMutex );
+
+    // get title height
+    tools::Long aTextHeight;
+    tools::Long nIconHeight = 2*TOP_OFFSET + SMALL_ICON_SIZE;
+    tools::Long nTitleHeight = 2*TOP_OFFSET + GetTextHeight();
+    if ( nIconHeight < nTitleHeight )
+        aTextHeight = nTitleHeight;
+    else
+        aTextHeight = nIconHeight;
+
+    // calc description height
+    Size aSize = GetOutputSizePixel();
+
+    aSize.AdjustWidth( -(ICON_OFFSET) );
+    aSize.setHeight( 10000 );
+
+    OUString aText( m_vEntries[ nPos ]->m_sErrorText );
+    if ( !aText.isEmpty() )
+        aText += "\n";
+    aText += m_vEntries[ nPos ]->m_sDescription;
+
+    tools::Rectangle aRect = GetDrawingArea()->get_ref_device().GetTextRect(tools::Rectangle( Point(), aSize ), aText,
+                                                                            DrawTextFlags::MultiLine | DrawTextFlags::WordBreak);
+    aTextHeight += aRect.GetHeight();
+
+    if ( aTextHeight < m_nStdHeight )
+        aTextHeight = m_nStdHeight;
+
+    m_nActiveHeight = aTextHeight;
+
+    if ( m_vEntries[ nPos ]->m_bHasButtons )
+        m_nActiveHeight += 2;
+}
+
+tools::Rectangle ExtensionBox_Impl::GetEntryRect( const tools::Long nPos ) const
+{
+    const ::osl::MutexGuard aGuard( m_entriesMutex );
+
+    Size aSize( GetOutputSizePixel() );
+
+    if ( m_vEntries[ nPos ]->m_bActive )
+        aSize.setHeight( m_nActiveHeight );
+    else
+        aSize.setHeight( m_nStdHeight );
+
+    Point aPos( 0, -m_nTopIndex + nPos * m_nStdHeight );
+    if ( m_bHasActive && ( nPos < m_nActive ) )
+        aPos.AdjustY(m_nActiveHeight - m_nStdHeight );
+
+    return tools::Rectangle( aPos, aSize );
+}
+
+
+void ExtensionBox_Impl::DeleteRemoved()
+{
+    const ::osl::MutexGuard aGuard( m_entriesMutex );
+
+    m_bInDelete = true;
+
+    m_vRemovedEntries.clear();
+
+    m_bInDelete = false;
+}
+
+
+//This function may be called with nPos < 0
+void ExtensionBox_Impl::selectEntry( const tools::Long nPos )
+{
+    bool invalidate = false;
+    {
+        //ToDo we should not use the guard at such a big scope here.
+        //Currently it is used to guard m_vEntries and m_nActive. m_nActive will be
+        //modified in this function.
+        //It would be probably best to always use a copy of m_vEntries
+        //and some other state variables from ExtensionBox_Impl for
+        //the whole painting operation. See issue i86993
+        ::osl::MutexGuard guard(m_entriesMutex);
+
+        if ( m_bInCheckMode )
+            return;
+
+        if ( m_bHasActive )
+        {
+            if ( nPos == m_nActive )
+                return;
+
+            m_bHasActive = false;
+            m_vEntries[ m_nActive ]->m_bActive = false;
+        }
+
+        if ( ( nPos >= 0 ) && ( o3tl::make_unsigned(nPos) < m_vEntries.size() ) )
+        {
+            m_bHasActive = true;
+            m_nActive = nPos;
+            m_vEntries[ nPos ]->m_bActive = true;
+
+            if ( IsReallyVisible() )
+            {
+                m_bAdjustActive = true;
+            }
+        }
+
+        if ( IsReallyVisible() )
+        {
+            m_bNeedsRecalc = true;
+            invalidate = true;
+        }
+    }
+
+    if (invalidate)
+    {
+        SolarMutexGuard g;
+        Invalidate();
+    }
+}
+
+
+void ExtensionBox_Impl::DrawRow(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect, const TEntry_Impl& rEntry)
+{
+    const StyleSettings& rStyleSettings = rRenderContext.GetSettings().GetStyleSettings();
+
+    if (rEntry->m_bActive)
+        rRenderContext.SetTextColor(rStyleSettings.GetHighlightTextColor());
+    else if ((rEntry->m_eState != REGISTERED) && (rEntry->m_eState != NOT_AVAILABLE))
+        rRenderContext.SetTextColor(rStyleSettings.GetDisableColor());
+    else
+        rRenderContext.SetTextColor(rStyleSettings.GetFieldTextColor());
+
+    if (rEntry->m_bActive)
+    {
+        rRenderContext.SetLineColor();
+        rRenderContext.SetFillColor(rStyleSettings.GetHighlightColor());
+        rRenderContext.DrawRect(rRect);
+    }
+    else
+    {
+        rRenderContext.SetBackground(rStyleSettings.GetFieldColor());
+        rRenderContext.SetTextFillColor();
+        rRenderContext.Erase(rRect);
+    }
+
+    // Draw extension icon
+    Point aPos( rRect.TopLeft() );
+    aPos += Point(TOP_OFFSET, TOP_OFFSET);
+    Image aImage;
+    if (!rEntry->m_aIcon)
+        aImage = m_aDefaultImage;
+    else
+        aImage = rEntry->m_aIcon;
+    Size aImageSize = aImage.GetSizePixel();
+    if ((aImageSize.Width() <= ICON_WIDTH ) && ( aImageSize.Height() <= ICON_HEIGHT ) )
+        rRenderContext.DrawImage(Point(aPos.X() + ((ICON_WIDTH - aImageSize.Width()) / 2),
+                                       aPos.Y() + ((ICON_HEIGHT - aImageSize.Height()) / 2)),
+                                 aImage);
+    else
+        rRenderContext.DrawImage(aPos, Size(ICON_WIDTH, ICON_HEIGHT), aImage);
+
+    // Setup fonts
+    // expand the point size of the desired font to the equivalent pixel size
+    weld::SetPointFont(rRenderContext, GetDrawingArea()->get_font());
+    vcl::Font aStdFont(rRenderContext.GetFont());
+    vcl::Font aBoldFont(aStdFont);
+    aBoldFont.SetWeight(WEIGHT_BOLD);
+    rRenderContext.SetFont(aBoldFont);
+    auto aTextHeight = rRenderContext.GetTextHeight();
+
+    // Get max title width
+    auto nMaxTitleWidth = rRect.GetWidth() - ICON_OFFSET;
+    nMaxTitleWidth -= (2 * SMALL_ICON_SIZE) + (4 * SPACE_BETWEEN);
+    rRenderContext.SetFont(aStdFont);
+    tools::Long nLinkWidth = 0;
+    if (!rEntry->m_sPublisher.isEmpty())
+    {
+        nLinkWidth = rRenderContext.GetTextWidth(rEntry->m_sPublisher);
+        nMaxTitleWidth -= nLinkWidth + (2 * SPACE_BETWEEN);
+    }
+    tools::Long aVersionWidth = rRenderContext.GetTextWidth(rEntry->m_sVersion);
+
+    aPos = rRect.TopLeft() + Point(ICON_OFFSET, TOP_OFFSET);
+
+    rRenderContext.SetFont(aBoldFont);
+    tools::Long aTitleWidth = rRenderContext.GetTextWidth(rEntry->m_sTitle) + (aTextHeight / 3);
+    if (aTitleWidth > nMaxTitleWidth - aVersionWidth)
+    {
+        aTitleWidth = nMaxTitleWidth - aVersionWidth - (aTextHeight / 3);
+        OUString aShortTitle = rRenderContext.GetEllipsisString(rEntry->m_sTitle, aTitleWidth);
+        rRenderContext.DrawText(aPos, aShortTitle);
+        aTitleWidth += (aTextHeight / 3);
+    }
+    else
+        rRenderContext.DrawText(aPos, rEntry->m_sTitle);
+
+    rRenderContext.SetFont(aStdFont);
+    rRenderContext.DrawText(Point(aPos.X() + aTitleWidth, aPos.Y()), rEntry->m_sVersion);
+
+    tools::Long nIconHeight = TOP_OFFSET + SMALL_ICON_SIZE;
+    tools::Long nTitleHeight = TOP_OFFSET + GetTextHeight();
+    if ( nIconHeight < nTitleHeight )
+        aTextHeight = nTitleHeight;
+    else
+        aTextHeight = nIconHeight;
+
+    // draw description
+    OUString sDescription;
+    if (!rEntry->m_sErrorText.isEmpty())
+    {
+        if (rEntry->m_bActive)
+            sDescription = rEntry->m_sErrorText + "\n" + rEntry->m_sDescription;
+        else
+            sDescription = rEntry->m_sErrorText;
+    }
+    else
+        sDescription = rEntry->m_sDescription;
+
+    aPos.AdjustY(aTextHeight );
+    if (rEntry->m_bActive)
+    {
+        tools::Long nExtraHeight = 0;
+
+        if (rEntry->m_bHasButtons)
+            nExtraHeight = 2;
+
+        rRenderContext.DrawText(tools::Rectangle(aPos.X(), aPos.Y(), rRect.Right(), rRect.Bottom() - nExtraHeight),
+                                sDescription, DrawTextFlags::MultiLine | DrawTextFlags::WordBreak );
+    }
+    else
+    {
+        //replace LF to space, so words do not stick together in one line view
+        sDescription = sDescription.replace(0x000A, ' ');
+        const tools::Long nWidth = rRenderContext.GetTextWidth( sDescription );
+        if (nWidth > rRect.GetWidth() - aPos.X())
+            sDescription = rRenderContext.GetEllipsisString(sDescription, rRect.GetWidth() - aPos.X());
+        rRenderContext.DrawText(aPos, sDescription);
+    }
+
+    // Draw publisher link
+    if (!rEntry->m_sPublisher.isEmpty())
+    {
+        aPos = rRect.TopLeft() + Point( ICON_OFFSET + nMaxTitleWidth + (2*SPACE_BETWEEN), TOP_OFFSET );
+
+        rRenderContext.Push(vcl::PushFlags::FONT | vcl::PushFlags::TEXTCOLOR | vcl::PushFlags::TEXTFILLCOLOR);
+        rRenderContext.SetTextColor(rStyleSettings.GetLinkColor());
+        rRenderContext.SetTextFillColor(rStyleSettings.GetFieldColor());
+        vcl::Font aFont = rRenderContext.GetFont();
+        // to underline
+        aFont.SetUnderline(LINESTYLE_SINGLE);
+        rRenderContext.SetFont(aFont);
+        rRenderContext.DrawText(aPos, rEntry->m_sPublisher);
+        rEntry->m_aLinkRect = tools::Rectangle(aPos, Size(nLinkWidth, aTextHeight));
+        rRenderContext.Pop();
+    }
+
+    // Draw status icons
+    if (!rEntry->m_bUser)
+    {
+        aPos = rRect.TopRight() + Point( -(RIGHT_ICON_OFFSET + SMALL_ICON_SIZE), TOP_OFFSET );
+        if (rEntry->m_bLocked)
+            rRenderContext.DrawImage(aPos, Size(SMALL_ICON_SIZE, SMALL_ICON_SIZE), m_aLockedImage);
+        else
+            rRenderContext.DrawImage(aPos, Size(SMALL_ICON_SIZE, SMALL_ICON_SIZE), m_aSharedImage);
+    }
+    if ((rEntry->m_eState == AMBIGUOUS ) || rEntry->m_bMissingDeps || rEntry->m_bMissingLic)
+    {
+        aPos = rRect.TopRight() + Point(-(RIGHT_ICON_OFFSET + SPACE_BETWEEN + 2 * SMALL_ICON_SIZE), TOP_OFFSET);
+        rRenderContext.DrawImage(aPos, Size(SMALL_ICON_SIZE, SMALL_ICON_SIZE), m_aWarningImage);
+    }
+
+    rRenderContext.SetLineColor(COL_LIGHTGRAY);
+    rRenderContext.DrawLine(rRect.BottomLeft(), rRect.BottomRight());
+}
+
+
+void ExtensionBox_Impl::RecalcAll()
+{
+    if ( m_bHasActive )
+        CalcActiveHeight( m_nActive );
+
+    SetupScrollBar();
+
+    if ( m_bHasActive )
+    {
+        tools::Rectangle aEntryRect = GetEntryRect( m_nActive );
+
+        if ( m_bAdjustActive )
+        {
+            m_bAdjustActive = false;
+
+            // If the top of the selected entry isn't visible, make it visible
+            if ( aEntryRect.Top() < 0 )
+            {
+                m_nTopIndex += aEntryRect.Top();
+                aEntryRect.Move( 0, -aEntryRect.Top() );
+            }
+
+            // If the bottom of the selected entry isn't visible, make it visible even if now the top
+            // isn't visible any longer ( the buttons are more important )
+            Size aOutputSize = GetOutputSizePixel();
+            if ( aEntryRect.Bottom() > aOutputSize.Height() )
+            {
+                m_nTopIndex += ( aEntryRect.Bottom() - aOutputSize.Height() );
+                aEntryRect.Move( 0, -( aEntryRect.Bottom() - aOutputSize.Height() ) );
+            }
+
+            // If there is unused space below the last entry but all entries don't fit into the box,
+            // move the content down to use the whole space
+            const tools::Long nTotalHeight = GetTotalHeight();
+            if ( m_bHasScrollBar && ( aOutputSize.Height() + m_nTopIndex > nTotalHeight ) )
+            {
+                tools::Long nOffset = m_nTopIndex;
+                m_nTopIndex = nTotalHeight - aOutputSize.Height();
+                nOffset -= m_nTopIndex;
+                aEntryRect.Move( 0, nOffset );
+            }
+
+            if ( m_bHasScrollBar )
+                m_xScrollBar->vadjustment_set_value( m_nTopIndex );
+        }
+    }
+
+    m_bNeedsRecalc = false;
+}
+
+
+bool ExtensionBox_Impl::HandleCursorKey( sal_uInt16 nKeyCode )
+{
+    if ( m_vEntries.empty() )
+        return true;
+
+    tools::Long nSelect = 0;
+
+    if ( m_bHasActive )
+    {
+        tools::Long nPageSize = GetOutputSizePixel().Height() / m_nStdHeight;
+        if ( nPageSize < 2 )
+            nPageSize = 2;
+
+        if ( ( nKeyCode == KEY_DOWN ) || ( nKeyCode == KEY_RIGHT ) )
+            nSelect = m_nActive + 1;
+        else if ( ( nKeyCode == KEY_UP ) || ( nKeyCode == KEY_LEFT ) )
+            nSelect = m_nActive - 1;
+        else if ( nKeyCode == KEY_HOME )
+            nSelect = 0;
+        else if ( nKeyCode == KEY_END )
+            nSelect = m_vEntries.size() - 1;
+        else if ( nKeyCode == KEY_PAGEUP )
+            nSelect = m_nActive - nPageSize + 1;
+        else if ( nKeyCode == KEY_PAGEDOWN )
+            nSelect = m_nActive + nPageSize - 1;
+    }
+    else // when there is no selected entry, we will select the first or the last.
+    {
+        if ( ( nKeyCode == KEY_DOWN ) || ( nKeyCode == KEY_PAGEDOWN ) || ( nKeyCode == KEY_HOME ) )
+            nSelect = 0;
+        else if ( ( nKeyCode == KEY_UP ) || ( nKeyCode == KEY_PAGEUP ) || ( nKeyCode == KEY_END ) )
+            nSelect = m_vEntries.size() - 1;
+    }
+
+    if ( nSelect < 0 )
+        nSelect = 0;
+    if ( o3tl::make_unsigned(nSelect) >= m_vEntries.size() )
+        nSelect = m_vEntries.size() - 1;
+
+    selectEntry( nSelect );
+
+    return true;
+}
+
+
+void ExtensionBox_Impl::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& /*rPaintRect*/)
+{
+    if ( !m_bInDelete )
+        DeleteRemoved();
+
+    if ( m_bNeedsRecalc )
+        RecalcAll();
+
+    Point aStart( 0, -m_nTopIndex );
+    Size aSize(GetOutputSizePixel());
+
+    const ::osl::MutexGuard aGuard( m_entriesMutex );
+
+    for (auto const& entry : m_vEntries)
+    {
+        aSize.setHeight( entry->m_bActive ? m_nActiveHeight : m_nStdHeight );
+        tools::Rectangle aEntryRect( aStart, aSize );
+        DrawRow(rRenderContext, aEntryRect, entry);
+        aStart.AdjustY(aSize.Height() );
+    }
+}
+
+
+tools::Long ExtensionBox_Impl::GetTotalHeight() const
+{
+    tools::Long nHeight = m_vEntries.size() * m_nStdHeight;
+
+    if ( m_bHasActive )
+    {
+        nHeight += m_nActiveHeight - m_nStdHeight;
+    }
+
+    return nHeight;
+}
+
+
+void ExtensionBox_Impl::SetupScrollBar()
+{
+    const Size aSize = GetOutputSizePixel();
+    const auto nTotalHeight = GetTotalHeight();
+    const bool bNeedsScrollBar = ( nTotalHeight > aSize.Height() );
+
+    if ( bNeedsScrollBar )
+    {
+        if ( m_nTopIndex + aSize.Height() > nTotalHeight )
+            m_nTopIndex = nTotalHeight - aSize.Height();
+
+        m_xScrollBar->vadjustment_configure(m_nTopIndex, 0, nTotalHeight,
+                                            m_nStdHeight, ( aSize.Height() * 4 ) / 5,
+                                            aSize.Height());
+
+        if (!m_bHasScrollBar)
+            m_xScrollBar->set_vpolicy(VclPolicyType::ALWAYS);
+    }
+    else if ( m_bHasScrollBar )
+    {
+        m_xScrollBar->set_vpolicy(VclPolicyType::NEVER);
+        m_nTopIndex = 0;
+    }
+
+    m_bHasScrollBar = bNeedsScrollBar;
+}
+
+
+void ExtensionBox_Impl::Resize()
+{
+    RecalcAll();
+    Invalidate();
+}
+
+void ExtensionBox_Impl::SetDrawingArea(weld::DrawingArea* pDrawingArea)
+{
+    Size aSize = pDrawingArea->get_ref_device().LogicToPixel(Size(250, 150), MapMode(MapUnit::MapAppFont));
+    pDrawingArea->set_size_request(aSize.Width(), aSize.Height());
+    CustomWidgetController::SetDrawingArea(pDrawingArea);
+    SetOutputSizePixel(aSize);
+
+    Init();
+}
+
+tools::Long ExtensionBox_Impl::PointToPos( const Point& rPos )
+{
+    tools::Long nPos = ( rPos.Y() + m_nTopIndex ) / m_nStdHeight;
+
+    if ( m_bHasActive && ( nPos > m_nActive ) )
+    {
+        if ( rPos.Y() + m_nTopIndex <= m_nActive*m_nStdHeight + m_nActiveHeight )
+            nPos = m_nActive;
+        else
+            nPos = ( rPos.Y() + m_nTopIndex - (m_nActiveHeight - m_nStdHeight) ) / m_nStdHeight;
+    }
+
+    return nPos;
+}
+
+bool ExtensionBox_Impl::MouseMove( const MouseEvent& rMEvt )
+{
+    bool bOverHyperlink = false;
+
+    auto nPos = PointToPos( rMEvt.GetPosPixel() );
+    if ( ( nPos >= 0 ) && ( o3tl::make_unsigned(nPos) < m_vEntries.size() ) )
+    {
+        const auto& rEntry = m_vEntries[nPos];
+        bOverHyperlink = !rEntry->m_sPublisher.isEmpty() && rEntry->m_aLinkRect.Contains(rMEvt.GetPosPixel());
+    }
+
+    if (bOverHyperlink)
+        SetPointer(PointerStyle::RefHand);
+    else
+        SetPointer(PointerStyle::Arrow);
+
+    return false;
+}
+
+OUString ExtensionBox_Impl::RequestHelp(tools::Rectangle& rRect)
+{
+    auto nPos = PointToPos( rRect.TopLeft() );
+    if ( ( nPos >= 0 ) && ( o3tl::make_unsigned(nPos) < m_vEntries.size() ) )
+    {
+        const auto& rEntry = m_vEntries[nPos];
+        bool bOverHyperlink = !rEntry->m_sPublisher.isEmpty() && rEntry->m_aLinkRect.Contains(rRect);
+        if (bOverHyperlink)
+        {
+            rRect = rEntry->m_aLinkRect;
+            return rEntry->m_sPublisherURL;
+        }
+    }
+
+    return OUString();
+}
+
+bool ExtensionBox_Impl::MouseButtonDown( const MouseEvent& rMEvt )
+{
+    if ( !rMEvt.IsLeft() )
+        return false;
+
+    if (rMEvt.IsMod1() && m_bHasActive)
+        selectEntry(ExtensionBox_Impl::ENTRY_NOTFOUND);   // Selecting a not existing entry will deselect the current one
+    else
+    {
+        auto nPos = PointToPos( rMEvt.GetPosPixel() );
+
+        if ( ( nPos >= 0 ) && ( o3tl::make_unsigned(nPos) < m_vEntries.size() ) )
+        {
+            const auto& rEntry = m_vEntries[nPos];
+            if (!rEntry->m_sPublisher.isEmpty() && rEntry->m_aLinkRect.Contains(rMEvt.GetPosPixel()))
+            {
+                try
+                {
+                    css::uno::Reference<css::system::XSystemShellExecute> xSystemShellExecute(
+                        css::system::SystemShellExecute::create(comphelper::getProcessComponentContext()));
+                    //throws css::lang::IllegalArgumentException, css::system::SystemShellExecuteException
+                    xSystemShellExecute->execute(rEntry->m_sPublisherURL, OUString(), css::system::SystemShellExecuteFlags::URIS_ONLY);
+                }
+                catch (...)
+                {
+                }
+                return true;
+            }
+        }
+
+        selectEntry( nPos );
+    }
+    return true;
+}
+
+bool ExtensionBox_Impl::KeyInput(const KeyEvent& rKEvt)
+{
+    if ( !m_bInDelete )
+        DeleteRemoved();
+
+    vcl::KeyCode aKeyCode = rKEvt.GetKeyCode();
+    sal_uInt16 nKeyCode = aKeyCode.GetCode();
+
+    bool bHandled = false;
+    if (nKeyCode != KEY_TAB && aKeyCode.GetGroup() == KEYGROUP_CURSOR)
+        bHandled = HandleCursorKey(nKeyCode);
+
+    return bHandled;
+}
+
+bool ExtensionBox_Impl::FindEntryPos( const TEntry_Impl& rEntry, const tools::Long nStart,
+                                      const tools::Long nEnd, tools::Long &nPos )
+{
+    nPos = nStart;
+    if ( nStart > nEnd )
+        return false;
+
+    sal_Int32 eCompare;
+
+    if ( nStart == nEnd )
+    {
+        eCompare = rEntry->CompareTo( m_pCollator.get(), m_vEntries[ nStart ] );
+        if ( eCompare < 0 )
+            return false;
+        else if ( eCompare == 0 )
+        {
+            //Workaround. See i86963.
+            if (rEntry->m_xPackage != m_vEntries[nStart]->m_xPackage)
+                return false;
+
+            if ( m_bInCheckMode )
+                m_vEntries[ nStart ]->m_bChecked = true;
+            return true;
+        }
+        else
+        {
+            nPos = nStart + 1;
+            return false;
+        }
+    }
+
+    const tools::Long nMid = nStart + ( ( nEnd - nStart ) / 2 );
+    eCompare = rEntry->CompareTo( m_pCollator.get(), m_vEntries[ nMid ] );
+
+    if ( eCompare < 0 )
+        return FindEntryPos( rEntry, nStart, nMid-1, nPos );
+    else if ( eCompare > 0 )
+        return FindEntryPos( rEntry, nMid+1, nEnd, nPos );
+    else
+    {
+        //Workaround.See i86963.
+        if (rEntry->m_xPackage != m_vEntries[nMid]->m_xPackage)
+            return false;
+
+        if ( m_bInCheckMode )
+            m_vEntries[ nMid ]->m_bChecked = true;
+        nPos = nMid;
+        return true;
+    }
+}
+
+void ExtensionBox_Impl::cleanVecListenerAdded()
+{
+    m_vListenerAdded.erase(std::remove_if(m_vListenerAdded.begin(), m_vListenerAdded.end(),
+        [](const uno::WeakReference<deployment::XPackage>& rxListener) {
+            const uno::Reference<deployment::XPackage> hardRef(rxListener);
+            return !hardRef.is();
+        }),
+        m_vListenerAdded.end());
+}
+
+void ExtensionBox_Impl::addEventListenerOnce(
+    uno::Reference<deployment::XPackage > const & extension)
+{
+    //make sure to only add the listener once
+    cleanVecListenerAdded();
+    if ( std::none_of(m_vListenerAdded.begin(), m_vListenerAdded.end(),
+                        FindWeakRef(extension)) )
+    {
+        extension->addEventListener( m_xRemoveListener );
+        m_vListenerAdded.emplace_back(extension);
+    }
+}
+
+
+void ExtensionBox_Impl::addEntry( const uno::Reference< deployment::XPackage > &xPackage,
+                                  bool bLicenseMissing )
+{
+    PackageState eState = TheExtensionManager::getPackageState( xPackage );
+    bool         bLocked = m_pManager->isReadOnly( xPackage );
+
+    TEntry_Impl pEntry = std::make_shared<Entry_Impl>( xPackage, eState, bLocked );
+
+    // Don't add empty entries
+    if ( pEntry->m_sTitle.isEmpty() )
+        return;
+
+    {
+        osl::MutexGuard guard(m_entriesMutex);
+        tools::Long nPos = 0;
+        if (m_vEntries.empty())
+        {
+            addEventListenerOnce(xPackage);
+            m_vEntries.push_back(pEntry);
+        }
+        else
+        {
+            if (!FindEntryPos(pEntry, 0, m_vEntries.size() - 1, nPos))
+            {
+                addEventListenerOnce(xPackage);
+                m_vEntries.insert(m_vEntries.begin() + nPos, pEntry);
+            }
+            else if (!m_bInCheckMode)
+            {
+                OSL_FAIL("ExtensionBox_Impl::addEntry(): Will not add duplicate entries");
+            }
+        }
+
+        pEntry->m_bHasOptions = m_pManager->supportsOptions(xPackage);
+        pEntry->m_bUser = (xPackage->getRepositoryName() == USER_PACKAGE_MANAGER);
+        pEntry->m_bShared = (xPackage->getRepositoryName() == SHARED_PACKAGE_MANAGER);
+        pEntry->m_bNew = m_bInCheckMode;
+        pEntry->m_bMissingLic = bLicenseMissing;
+
+        if (bLicenseMissing)
+            pEntry->m_sErrorText = DpResId(RID_STR_ERROR_MISSING_LICENSE);
+
+        //access to m_nActive must be guarded
+        if (!m_bInCheckMode && m_bHasActive && (m_nActive >= nPos))
+            m_nActive += 1;
+    }
+
+    if ( IsReallyVisible() )
+        Invalidate();
+
+    m_bNeedsRecalc = true;
+}
+
+void ExtensionBox_Impl::updateEntry( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    for (auto const& entry : m_vEntries)
+    {
+        if ( entry->m_xPackage == xPackage )
+        {
+            PackageState eState = TheExtensionManager::getPackageState( xPackage );
+            entry->m_bHasOptions = m_pManager->supportsOptions( xPackage );
+            entry->m_eState = eState;
+            entry->m_sTitle = xPackage->getDisplayName();
+            entry->m_sVersion = xPackage->getVersion();
+            entry->m_sDescription = xPackage->getDescription();
+
+            if ( eState == REGISTERED )
+                entry->m_bMissingLic = false;
+
+            if ( eState == AMBIGUOUS )
+                entry->m_sErrorText = DpResId( RID_STR_ERROR_UNKNOWN_STATUS );
+            else if ( ! entry->m_bMissingLic )
+                entry->m_sErrorText.clear();
+
+            if ( IsReallyVisible() )
+                Invalidate();
+            break;
+        }
+    }
+}
+
+//This function is also called as a result of removing an extension.
+//see PackageManagerImpl::removePackage
+//The gui is a registered as listener on the package. Removing it will cause the
+//listeners to be notified and then this function is called. At this moment xPackage
+//is in the disposing state and all calls on it may result in a DisposedException.
+void ExtensionBox_Impl::removeEntry( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    if (  m_bInDelete )
+        return;
+
+    bool invalidate = false;
+    {
+        ::osl::ClearableMutexGuard aGuard( m_entriesMutex );
+
+        auto iIndex = std::find_if(m_vEntries.begin(), m_vEntries.end(),
+            [&xPackage](const TEntry_Impl& rxEntry) { return rxEntry->m_xPackage == xPackage; });
+        if (iIndex != m_vEntries.end())
+        {
+            tools::Long nPos = iIndex - m_vEntries.begin();
+
+            // Entries mustn't be removed here, because they contain a hyperlink control
+            // which can only be deleted when the thread has the solar mutex. Therefore
+            // the entry will be moved into the m_vRemovedEntries list which will be
+            // cleared on the next paint event
+            m_vRemovedEntries.push_back( *iIndex );
+            (*iIndex)->m_xPackage->removeEventListener(m_xRemoveListener);
+            m_vEntries.erase( iIndex );
+
+            m_bNeedsRecalc = true;
+
+            if ( IsReallyVisible() )
+                invalidate = true;
+
+            if ( m_bHasActive )
+            {
+                if ( nPos < m_nActive )
+                    m_nActive -= 1;
+                else if ( ( nPos == m_nActive ) &&
+                          ( nPos == static_cast<tools::Long>(m_vEntries.size()) ) )
+                    m_nActive -= 1;
+
+                m_bHasActive = false;
+                //clear before calling out of this method
+                aGuard.clear();
+                selectEntry( m_nActive );
+            }
+        }
+    }
+
+    if (invalidate)
+    {
+        SolarMutexGuard g;
+        Invalidate();
+    }
+}
+
+
+void ExtensionBox_Impl::RemoveUnlocked()
+{
+    bool bAllRemoved = false;
+
+    while ( ! bAllRemoved )
+    {
+        bAllRemoved = true;
+
+        ::osl::ClearableMutexGuard aGuard( m_entriesMutex );
+
+        for (auto const& entry : m_vEntries)
+        {
+            if ( !entry->m_bLocked )
+            {
+                bAllRemoved = false;
+                uno::Reference< deployment::XPackage> xPackage = entry->m_xPackage;
+                aGuard.clear();
+                removeEntry( xPackage );
+                break;
+            }
+        }
+    }
+}
+
+
+void ExtensionBox_Impl::prepareChecking()
+{
+    m_bInCheckMode = true;
+    for (auto const& entry : m_vEntries)
+    {
+        entry->m_bChecked = false;
+        entry->m_bNew = false;
+    }
+}
+
+
+void ExtensionBox_Impl::checkEntries()
+{
+    tools::Long nNewPos = -1;
+    tools::Long nChangedActivePos = -1;
+    tools::Long nPos = 0;
+    bool bNeedsUpdate = false;
+
+    {
+        osl::MutexGuard guard(m_entriesMutex);
+        auto iIndex = m_vEntries.begin();
+        while (iIndex != m_vEntries.end())
+        {
+            if (!(*iIndex)->m_bChecked)
+            {
+                (*iIndex)->m_bChecked = true;
+                bNeedsUpdate = true;
+                nPos = iIndex - m_vEntries.begin();
+                if ((*iIndex)->m_bNew)
+                { // add entry to list and correct active pos
+                    if (nNewPos == -1)
+                        nNewPos = nPos;
+                    if (nPos <= m_nActive)
+                        m_nActive += 1;
+                    ++iIndex;
+                }
+                else
+                { // remove entry from list
+                    if (nPos < nNewPos)
+                    {
+                        --nNewPos;
+                    }
+                    if (nPos < nChangedActivePos)
+                    {
+                        --nChangedActivePos;
+                    }
+                    if (nPos < m_nActive)
+                        m_nActive -= 1;
+                    else if (nPos == m_nActive)
+                    {
+                        nChangedActivePos = nPos;
+                        m_nActive = -1;
+                        m_bHasActive = false;
+                    }
+                    m_vRemovedEntries.push_back(*iIndex);
+                    (*iIndex)->m_xPackage->removeEventListener(m_xRemoveListener);
+                    iIndex = m_vEntries.erase(iIndex);
+                }
+            }
+            else
+                ++iIndex;
+        }
+    }
+
+    m_bInCheckMode = false;
+
+    if ( nNewPos != - 1)
+        selectEntry( nNewPos );
+    else if (nChangedActivePos != -1) {
+        selectEntry(nChangedActivePos);
+    }
+
+    if ( bNeedsUpdate )
+    {
+        m_bNeedsRecalc = true;
+        if ( IsReallyVisible() )
+            Invalidate();
+    }
+}
+
+IMPL_LINK(ExtensionBox_Impl, ScrollHdl, weld::ScrolledWindow&, rScrBar, void)
+{
+    m_nTopIndex = rScrBar.vadjustment_get_value();
+    Invalidate();
+}
+
+} //namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_extlistbox.hxx b/desktop/source/deployment/gui/dp_gui_extlistbox.hxx
new file mode 100644
index 000000000..d706975dc
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_extlistbox.hxx
@@ -0,0 +1,214 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <vcl/customweld.hxx>
+#include <vcl/image.hxx>
+#include <vcl/weld.hxx>
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/weakref.hxx>
+#include <unotools/collatorwrapper.hxx>
+
+#include <com/sun/star/lang/Locale.hpp>
+#include <com/sun/star/lang/XEventListener.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+
+#include <memory>
+
+#include "dp_gui.h"
+
+namespace dp_gui {
+
+#define SMALL_ICON_SIZE     16
+#define TOP_OFFSET           5
+#define ICON_HEIGHT         42
+#define ICON_WIDTH          47
+#define ICON_OFFSET         72
+#define RIGHT_ICON_OFFSET    5
+#define SPACE_BETWEEN        3
+
+class TheExtensionManager;
+
+
+struct Entry_Impl;
+
+typedef std::shared_ptr< Entry_Impl > TEntry_Impl;
+
+struct Entry_Impl
+{
+    bool            m_bActive       :1;
+    bool            m_bLocked       :1;
+    bool            m_bHasOptions   :1;
+    bool            m_bUser         :1;
+    bool            m_bShared       :1;
+    bool            m_bNew          :1;
+    bool            m_bChecked      :1;
+    bool            m_bMissingDeps  :1;
+    bool            m_bHasButtons   :1;
+    bool            m_bMissingLic   :1;
+    PackageState    m_eState;
+    OUString        m_sTitle;
+    OUString        m_sVersion;
+    OUString        m_sDescription;
+    OUString        m_sPublisher;
+    OUString        m_sPublisherURL;
+    OUString        m_sErrorText;
+    OUString        m_sLicenseText;
+    Image           m_aIcon;
+    tools::Rectangle m_aLinkRect;
+
+    css::uno::Reference<css::deployment::XPackage> m_xPackage;
+
+    Entry_Impl(const css::uno::Reference<css::deployment::XPackage> &xPackage,
+               const PackageState eState, const bool bReadOnly);
+   ~Entry_Impl();
+
+    sal_Int32 CompareTo(const CollatorWrapper *pCollator, const TEntry_Impl& rEntry) const;
+    void checkDependencies();
+};
+
+class ExtensionBox_Impl;
+
+
+class ExtensionRemovedListener : public ::cppu::WeakImplHelper<css::lang::XEventListener>
+{
+    ExtensionBox_Impl*   m_pParent;
+
+public:
+
+    explicit ExtensionRemovedListener( ExtensionBox_Impl *pParent ) { m_pParent = pParent; }
+    virtual ~ExtensionRemovedListener() override;
+
+
+    // XEventListener
+    virtual void SAL_CALL disposing(css::lang::EventObject const& evt) override;
+};
+
+class ExtensionBox_Impl : public weld::CustomWidgetController
+{
+    bool m_bHasScrollBar : 1;
+    bool m_bHasActive : 1;
+    bool m_bNeedsRecalc : 1;
+    bool m_bInCheckMode : 1;
+    bool m_bAdjustActive : 1;
+    bool m_bInDelete : 1;
+    //Must be guarded together with m_vEntries to ensure a valid index at all times.
+    //Use m_entriesMutex as guard.
+    tools::Long m_nActive;
+    tools::Long m_nTopIndex;
+    tools::Long m_nStdHeight;
+    tools::Long m_nActiveHeight;
+    Image m_aSharedImage;
+    Image m_aLockedImage;
+    Image m_aWarningImage;
+    Image m_aDefaultImage;
+
+    rtl::Reference<ExtensionRemovedListener> m_xRemoveListener;
+
+    TheExtensionManager      *m_pManager;
+    //This mutex is used for synchronizing access to m_vEntries.
+    //Currently it is used to synchronize adding, removing entries and
+    //functions like getItemName, getItemDescription, etc. to prevent
+    //that m_vEntries is accessed at an invalid index.
+    //ToDo: There are many more places where m_vEntries is read and which may
+    //fail. For example the Paint method is probable called from the main thread
+    //while new entries are added / removed in a separate thread.
+    mutable ::osl::Mutex    m_entriesMutex;
+    std::vector< TEntry_Impl > m_vEntries;
+    std::vector< TEntry_Impl > m_vRemovedEntries;
+
+    std::unique_ptr<css::lang::Locale> m_pLocale;
+    std::unique_ptr<CollatorWrapper>   m_pCollator;
+
+    //Holds weak references to extensions to which is we have added an XEventListener
+    std::vector< css::uno::WeakReference<
+        css::deployment::XPackage> > m_vListenerAdded;
+
+    std::unique_ptr<weld::ScrolledWindow> m_xScrollBar;
+
+    //Removes the dead weak references from m_vListenerAdded
+    void cleanVecListenerAdded();
+    void addEventListenerOnce(css::uno::Reference<css::deployment::XPackage> const & extension);
+
+    void CalcActiveHeight( const tools::Long nPos );
+    tools::Long GetTotalHeight() const;
+    void SetupScrollBar();
+    void DrawRow(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect, const TEntry_Impl& rEntry);
+    bool HandleCursorKey( sal_uInt16 nKeyCode );
+    bool FindEntryPos( const TEntry_Impl& rEntry, tools::Long nStart, tools::Long nEnd, tools::Long &nFound );
+    void DeleteRemoved();
+
+    DECL_LINK( ScrollHdl, weld::ScrolledWindow&, void );
+
+    void Init();
+public:
+    explicit ExtensionBox_Impl(std::unique_ptr<weld::ScrolledWindow> xScroll);
+    virtual ~ExtensionBox_Impl() override;
+
+    virtual bool MouseButtonDown( const MouseEvent& rMEvt ) override;
+    virtual bool MouseMove( const MouseEvent& rMEvt ) override;
+    virtual bool KeyInput(const KeyEvent& rKEvt) override;
+    virtual void Paint( vcl::RenderContext& rRenderContext, const tools::Rectangle &rPaintRect ) override;
+    virtual void Resize() override;
+    virtual OUString RequestHelp(tools::Rectangle& rRect) override;
+
+    virtual void SetDrawingArea(weld::DrawingArea* pDrawingArea) override;
+
+    TEntry_Impl const & GetEntryData( tools::Long nPos ) { return m_vEntries[ nPos ]; }
+    tools::Long            GetEntryCount() const { return static_cast<tools::Long>(m_vEntries.size()); }
+    tools::Rectangle       GetEntryRect( const tools::Long nPos ) const;
+    bool            HasActive() const { return m_bHasActive; }
+    tools::Long            PointToPos( const Point& rPos );
+    virtual void    RecalcAll();
+    void            RemoveUnlocked();
+
+
+    virtual void selectEntry( const tools::Long nPos );
+    void addEntry(const css::uno::Reference<css::deployment::XPackage> &xPackage,
+                              bool bLicenseMissing = false );
+    void updateEntry(const css::uno::Reference<css::deployment::XPackage> &xPackage );
+    void removeEntry(const css::uno::Reference<css::deployment::XPackage> &xPackage );
+
+    void prepareChecking();
+    void checkEntries();
+
+    void setExtensionManager(TheExtensionManager* pManager) { m_pManager = pManager; }
+
+    //These functions are used for automatic testing
+public:
+    enum { ENTRY_NOTFOUND = -1 };
+
+    /** @return  The count of the entries in the list box. */
+    sal_Int32 getItemCount() const;
+
+    /** @return  The index of the first selected entry in the list box.
+        When nothing is selected, which is the case when getItemCount returns '0',
+        then this function returns ENTRY_NOTFOUND */
+    /** @return  The index of the first selected entry in the list box.
+        When nothing is selected, which is the case when getItemCount returns '0',
+        then this function returns ENTRY_NOTFOUND */
+    sal_Int32 getSelIndex() const;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_service.cxx b/desktop/source/deployment/gui/dp_gui_service.cxx
new file mode 100644
index 000000000..c359cb750
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_service.cxx
@@ -0,0 +1,316 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <memory>
+#include "dp_gui_theextmgr.hxx"
+#include <osl/diagnose.h>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <unotools/configmgr.hxx>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/unwrapargs.hxx>
+#include <unotools/resmgr.hxx>
+#include <vcl/weld.hxx>
+#include <vcl/window.hxx>
+#include <vcl/svapp.hxx>
+#include <com/sun/star/task/XJobExecutor.hpp>
+#include <com/sun/star/ui/dialogs/XAsynchronousExecutableDialog.hpp>
+
+#include <optional>
+#include "license_dialog.hxx"
+#include "dp_gui_dialog2.hxx"
+#include "dp_gui_extensioncmdqueue.hxx"
+#include <dp_misc.h>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_gui {
+
+namespace {
+
+class MyApp : public Application
+{
+public:
+    MyApp();
+
+    MyApp(const MyApp&) = delete;
+    const MyApp& operator=(const MyApp&) = delete;
+
+    // Application
+    virtual int Main() override;
+    virtual void DeInit() override;
+};
+
+}
+
+MyApp::MyApp()
+{
+}
+
+
+int MyApp::Main()
+{
+    return EXIT_SUCCESS;
+}
+
+void MyApp::DeInit()
+{
+    css::uno::Reference< css::uno::XComponentContext > context(
+        comphelper::getProcessComponentContext());
+    dp_misc::disposeBridges(context);
+    css::uno::Reference< css::lang::XComponent >(
+        context, css::uno::UNO_QUERY_THROW)->dispose();
+    comphelper::setProcessServiceFactory(nullptr);
+}
+
+static OUString ReplaceProductNameHookProc( const OUString& rStr )
+{
+    if (rStr.indexOf( "%PRODUCT" ) == -1)
+        return rStr;
+
+    static const OUString sProductName = utl::ConfigManager::getProductName();
+    static const OUString sVersion = utl::ConfigManager::getProductVersion();
+    static const OUString sAboutBoxVersion = utl::ConfigManager::getAboutBoxProductVersion();
+    static const OUString sAboutBoxVersionSuffix = utl::ConfigManager::getAboutBoxProductVersionSuffix();
+    static const OUString sExtension = utl::ConfigManager::getProductExtension();
+    static const OUString sOOOVendor = utl::ConfigManager::getVendor();
+
+    OUString sRet = rStr.replaceAll( "%PRODUCTNAME", sProductName );
+    sRet = sRet.replaceAll( "%PRODUCTVERSION", sVersion );
+    sRet = sRet.replaceAll( "%ABOUTBOXPRODUCTVERSIONSUFFIX", sAboutBoxVersionSuffix );
+    sRet = sRet.replaceAll( "%ABOUTBOXPRODUCTVERSION", sAboutBoxVersion );
+    sRet = sRet.replaceAll( "%OOOVENDOR", sOOOVendor );
+    sRet = sRet.replaceAll( "%PRODUCTEXTENSION", sExtension );
+    return sRet;
+}
+
+namespace {
+
+class ServiceImpl
+    : public ::cppu::WeakImplHelper<ui::dialogs::XAsynchronousExecutableDialog,
+                                     task::XJobExecutor, css::lang::XServiceInfo>
+{
+    Reference<XComponentContext> const m_xComponentContext;
+    std::optional< Reference<awt::XWindow> > /* const */ m_parent;
+    std::optional<OUString> m_extensionURL;
+    OUString m_initialTitle;
+    bool m_bShowUpdateOnly;
+
+public:
+    ServiceImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XAsynchronousExecutableDialog
+    virtual void SAL_CALL setDialogTitle( OUString const & aTitle ) override;
+    virtual void SAL_CALL startExecuteModal(
+        Reference< ui::dialogs::XDialogClosedListener > const & xListener ) override;
+
+    // XJobExecutor
+    virtual void SAL_CALL trigger( OUString const & event ) override;
+};
+
+}
+
+ServiceImpl::ServiceImpl( Sequence<Any> const& args,
+                          Reference<XComponentContext> const& xComponentContext)
+    : m_xComponentContext(xComponentContext),
+      m_bShowUpdateOnly( false )
+{
+    /* if true then this service is running in a unopkg process and not in an office process */
+    std::optional<OUString> view;
+    try {
+        std::optional<sal_Bool> unopkg;
+        comphelper::unwrapArgs( args, m_parent, view, unopkg );
+        return;
+    } catch ( const css::lang::IllegalArgumentException & ) {
+    }
+    try {
+        comphelper::unwrapArgs( args, m_extensionURL);
+    } catch ( const css::lang::IllegalArgumentException & ) {
+    }
+
+    ResHookProc pProc = Translate::GetReadStringHook();
+    if ( !pProc )
+        Translate::SetReadStringHook(ReplaceProductNameHookProc);
+}
+
+// XServiceInfo
+OUString ServiceImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.ui.PackageManagerDialog";
+}
+
+sal_Bool ServiceImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > ServiceImpl::getSupportedServiceNames()
+{
+    return { "com.sun.star.deployment.ui.PackageManagerDialog" };
+}
+
+// XAsynchronousExecutableDialog
+
+void ServiceImpl::setDialogTitle( OUString const & title )
+{
+    if ( dp_gui::TheExtensionManager::s_ExtMgr.is() )
+    {
+        const SolarMutexGuard guard;
+        ::rtl::Reference< ::dp_gui::TheExtensionManager > dialog(
+            ::dp_gui::TheExtensionManager::get( m_xComponentContext,
+                                                m_parent ? *m_parent : Reference<awt::XWindow>(),
+                                                m_extensionURL ? *m_extensionURL : OUString() ) );
+        dialog->SetText( title );
+    }
+    else
+        m_initialTitle = title;
+}
+
+
+void ServiceImpl::startExecuteModal(
+    Reference< ui::dialogs::XDialogClosedListener > const & xListener )
+{
+    bool bCloseDialog = true;  // only used if m_bShowUpdateOnly is true
+    std::unique_ptr<Application> app;
+    //ToDo: synchronize access to s_dialog !!!
+    if (! dp_gui::TheExtensionManager::s_ExtMgr.is())
+    {
+        const bool bAppUp = (GetpApp() != nullptr);
+        bool bOfficePipePresent;
+        try {
+            bOfficePipePresent = dp_misc::office_is_running();
+        }
+        catch (const Exception & exc) {
+            if (bAppUp) {
+                const SolarMutexGuard guard;
+                vcl::Window* pWin = Application::GetActiveTopWindow();
+                std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(pWin ? pWin->GetFrameWeld() : nullptr,
+                                                          VclMessageType::Warning, VclButtonsType::Ok, exc.Message));
+                xBox->run();
+            }
+            throw;
+        }
+
+        if (! bOfficePipePresent) {
+            OSL_ASSERT( ! bAppUp );
+            app.reset( new MyApp );
+            if (! InitVCL() )
+                throw RuntimeException( "Cannot initialize VCL!",
+                                        static_cast<OWeakObject *>(this) );
+            Application::SetDisplayName(
+                utl::ConfigManager::getProductName() +
+                " " +
+                utl::ConfigManager::getProductVersion());
+            ExtensionCmdQueue::syncRepositories( m_xComponentContext );
+        }
+    }
+    else
+    {
+        // When m_bShowUpdateOnly is set, we are inside the office and the user clicked
+        // the update notification icon in the menu bar. We must not close the extensions
+        // dialog after displaying the update dialog when it has been visible before
+        if ( m_bShowUpdateOnly )
+            bCloseDialog = ! dp_gui::TheExtensionManager::s_ExtMgr->isVisible();
+    }
+
+    {
+        const SolarMutexGuard guard;
+        ::rtl::Reference< ::dp_gui::TheExtensionManager > myExtMgr(
+            ::dp_gui::TheExtensionManager::get(
+                m_xComponentContext,
+                m_parent ? *m_parent : Reference<awt::XWindow>(),
+                m_extensionURL ? *m_extensionURL : OUString() ) );
+        myExtMgr->createDialog( false );
+        if (!m_initialTitle.isEmpty()) {
+            myExtMgr->SetText( m_initialTitle );
+            m_initialTitle.clear();
+        }
+        if ( m_bShowUpdateOnly )
+        {
+            myExtMgr->checkUpdates();
+            if ( bCloseDialog )
+                myExtMgr->Close();
+            else
+                myExtMgr->ToTop();
+        }
+        else
+        {
+            myExtMgr->Show();
+            myExtMgr->ToTop();
+        }
+    }
+
+    if (app != nullptr)
+    {
+        Application::Execute();
+        DeInitVCL();
+    }
+
+    if (xListener.is())
+        xListener->dialogClosed(
+            ui::dialogs::DialogClosedEvent(
+                static_cast< ::cppu::OWeakObject * >(this),
+                sal_Int16(0)) );
+}
+
+// XJobExecutor
+
+void ServiceImpl::trigger( OUString const &rEvent )
+{
+    if ( rEvent == "SHOW_UPDATE_DIALOG" )
+        m_bShowUpdateOnly = true;
+    else
+        m_bShowUpdateOnly = false;
+
+    startExecuteModal( Reference< ui::dialogs::XDialogClosedListener >() );
+}
+
+} // namespace dp_gui
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_LicenseDialog_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_gui::LicenseDialog(args, context));
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_ServiceImpl_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_gui::ServiceImpl(args, context));
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+desktop_UpdateRequiredDialogService_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_gui::UpdateRequiredDialogService(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_theextmgr.cxx b/desktop/source/deployment/gui/dp_gui_theextmgr.cxx
new file mode 100644
index 000000000..5ee3f53c6
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_theextmgr.cxx
@@ -0,0 +1,537 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <utility>
+#include <vcl/svapp.hxx>
+
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/frame/TerminationVetoException.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <comphelper/propertysequence.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <osl/diagnose.h>
+#include <tools/diagnose_ex.h>
+
+#include "dp_gui_dialog2.hxx"
+#include "dp_gui_extensioncmdqueue.hxx"
+#include "dp_gui_theextmgr.hxx"
+#include <dp_misc.h>
+#include <dp_update.hxx>
+
+constexpr OUStringLiteral USER_PACKAGE_MANAGER = u"user";
+constexpr OUStringLiteral SHARED_PACKAGE_MANAGER = u"shared";
+
+using namespace ::com::sun::star;
+
+namespace dp_gui {
+
+
+::rtl::Reference< TheExtensionManager > TheExtensionManager::s_ExtMgr;
+
+
+//                             TheExtensionManager
+
+
+TheExtensionManager::TheExtensionManager( uno::Reference< awt::XWindow > xParent,
+                                          const uno::Reference< uno::XComponentContext > &xContext ) :
+    m_xContext( xContext ),
+    m_xParent(std::move( xParent )),
+    m_bModified(false),
+    m_bExtMgrDialogExecuting(false)
+{
+    m_xExtensionManager = deployment::ExtensionManager::get( xContext );
+    m_xExtensionManager->addModifyListener( this );
+
+    uno::Reference< lang::XMultiServiceFactory > xConfig(
+        configuration::theDefaultProvider::get(xContext));
+    uno::Sequence<uno::Any> args(comphelper::InitAnyPropertySequence(
+    {
+        {"nodepath", uno::Any(OUString("/org.openoffice.Office.OptionsDialog/Nodes"))}
+    }));
+    m_xNameAccessNodes.set(
+        xConfig->createInstanceWithArguments( "com.sun.star.configuration.ConfigurationAccess", args),
+        uno::UNO_QUERY_THROW);
+
+    // get the 'get more extensions here' url
+    uno::Sequence<uno::Any> args2(comphelper::InitAnyPropertySequence(
+    {
+        {"nodepath", uno::Any(OUString("/org.openoffice.Office.ExtensionManager/ExtensionRepositories"))}
+    }));
+    uno::Reference< container::XNameAccess > xNameAccessRepositories;
+    xNameAccessRepositories.set(
+        xConfig->createInstanceWithArguments( "com.sun.star.configuration.ConfigurationAccess", args2),
+        uno::UNO_QUERY_THROW);
+    try
+    {   //throws css::container::NoSuchElementException, css::lang::WrappedTargetException
+        uno::Any value = xNameAccessRepositories->getByName("WebsiteLink");
+        m_sGetExtensionsURL = value.get< OUString > ();
+     }
+    catch ( const uno::Exception& )
+    {}
+
+    if ( dp_misc::office_is_running() )
+    {
+        // the registration should be done after the construction has been ended
+        // otherwise an exception prevents object creation, but it is registered as a listener
+        m_xDesktop.set( frame::Desktop::create(xContext), uno::UNO_SET_THROW );
+        m_xDesktop->addTerminateListener( this );
+    }
+}
+
+TheExtensionManager::~TheExtensionManager()
+{
+    if (m_xUpdReqDialog)
+        m_xUpdReqDialog->response(RET_CANCEL);
+    assert(!m_xUpdReqDialog);
+    if (m_xExtMgrDialog)
+    {
+        if (m_bExtMgrDialogExecuting)
+            m_xExtMgrDialog->response(RET_CANCEL);
+        else
+        {
+            m_xExtMgrDialog->Close();
+            m_xExtMgrDialog.reset();
+        }
+    }
+    assert(!m_xExtMgrDialog);
+}
+
+void TheExtensionManager::createDialog( const bool bCreateUpdDlg )
+{
+    const SolarMutexGuard guard;
+
+    if ( bCreateUpdDlg )
+    {
+        if ( !m_xUpdReqDialog )
+        {
+            m_xUpdReqDialog.reset(new UpdateRequiredDialog(Application::GetFrameWeld(m_xParent), this));
+            m_xExecuteCmdQueue.reset( new ExtensionCmdQueue( m_xUpdReqDialog.get(), this, m_xContext ) );
+            createPackageList();
+        }
+    }
+    else if ( !m_xExtMgrDialog )
+    {
+        m_xExtMgrDialog = std::make_shared<ExtMgrDialog>(Application::GetFrameWeld(m_xParent), this);
+        m_xExecuteCmdQueue.reset( new ExtensionCmdQueue( m_xExtMgrDialog.get(), this, m_xContext ) );
+        m_xExtMgrDialog->setGetExtensionsURL( m_sGetExtensionsURL );
+        createPackageList();
+    }
+}
+
+void TheExtensionManager::Show()
+{
+    const SolarMutexGuard guard;
+
+    m_bExtMgrDialogExecuting = true;
+
+    weld::DialogController::runAsync(m_xExtMgrDialog, [this](sal_Int32 /*nResult*/) {
+        m_bExtMgrDialogExecuting = false;
+        auto xExtMgrDialog = m_xExtMgrDialog;
+        m_xExtMgrDialog.reset();
+        xExtMgrDialog->Close();
+    });
+}
+
+void TheExtensionManager::SetText( const OUString &rTitle )
+{
+    const SolarMutexGuard guard;
+
+    getDialog()->set_title( rTitle );
+}
+
+
+void TheExtensionManager::ToTop()
+{
+    const SolarMutexGuard guard;
+
+    getDialog()->present();
+}
+
+void TheExtensionManager::Close()
+{
+    if (m_xExtMgrDialog)
+    {
+        if (m_bExtMgrDialogExecuting)
+            m_xExtMgrDialog->response(RET_CANCEL);
+        else
+            m_xExtMgrDialog->Close();
+    }
+    else if (m_xUpdReqDialog)
+        m_xUpdReqDialog->response(RET_CANCEL);
+}
+
+sal_Int16 TheExtensionManager::execute()
+{
+    sal_Int16 nRet = 0;
+
+    if ( m_xUpdReqDialog )
+    {
+        nRet = m_xUpdReqDialog->run();
+        m_xUpdReqDialog.reset();
+    }
+
+    return nRet;
+}
+
+bool TheExtensionManager::isVisible()
+{
+    weld::Window* pDialog = getDialog();
+    return pDialog && pDialog->get_visible();
+}
+
+void TheExtensionManager::checkUpdates()
+{
+    std::vector< uno::Reference< deployment::XPackage >  > vEntries;
+    uno::Sequence< uno::Sequence< uno::Reference< deployment::XPackage > > > xAllPackages;
+
+    try {
+        xAllPackages = m_xExtensionManager->getAllExtensions( uno::Reference< task::XAbortChannel >(),
+                                                              uno::Reference< ucb::XCommandEnvironment >() );
+    } catch ( const deployment::DeploymentException & ) {
+        return;
+    } catch ( const ucb::CommandFailedException & ) {
+        return;
+    } catch ( const ucb::CommandAbortedException & ) {
+        return;
+    } catch ( const lang::IllegalArgumentException & e ) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw css::lang::WrappedTargetRuntimeException( e.Message,
+                        e.Context, anyEx );
+    }
+
+    for ( auto const & i : std::as_const(xAllPackages) )
+    {
+        uno::Reference< deployment::XPackage > xPackage = dp_misc::getExtensionWithHighestVersion(i);
+        OSL_ASSERT(xPackage.is());
+        if ( xPackage.is() )
+        {
+            vEntries.push_back( xPackage );
+        }
+    }
+
+    m_xExecuteCmdQueue->checkForUpdates( std::move(vEntries) );
+}
+
+
+bool TheExtensionManager::installPackage( const OUString &rPackageURL, bool bWarnUser )
+{
+    if ( rPackageURL.isEmpty() )
+        return false;
+
+    createDialog( false );
+
+    bool bInstall = true;
+    bool bInstallForAll = false;
+
+    // DV! missing function is read only repository from extension manager
+    if ( !bWarnUser && ! m_xExtensionManager->isReadOnlyRepository( SHARED_PACKAGE_MANAGER ) )
+        bInstall = getDialogHelper()->installForAllUsers( bInstallForAll );
+
+    if ( !bInstall )
+        return false;
+
+    if ( bInstallForAll )
+        m_xExecuteCmdQueue->addExtension( rPackageURL, SHARED_PACKAGE_MANAGER, false );
+    else
+        m_xExecuteCmdQueue->addExtension( rPackageURL, USER_PACKAGE_MANAGER, bWarnUser );
+
+    return true;
+}
+
+
+void TheExtensionManager::terminateDialog()
+{
+    if (  dp_misc::office_is_running() )
+        return;
+
+    const SolarMutexGuard guard;
+    if (m_xExtMgrDialog)
+    {
+        if (m_bExtMgrDialogExecuting)
+            m_xExtMgrDialog->response(RET_CANCEL);
+        else
+        {
+            m_xExtMgrDialog->Close();
+            m_xExtMgrDialog.reset();
+        }
+    }
+    assert(!m_xExtMgrDialog);
+    if (m_xUpdReqDialog)
+        m_xUpdReqDialog->response(RET_CANCEL);
+    assert(!m_xUpdReqDialog);
+    Application::Quit();
+}
+
+
+void TheExtensionManager::createPackageList()
+{
+    uno::Sequence< uno::Sequence< uno::Reference< deployment::XPackage > > > xAllPackages;
+
+    try {
+        xAllPackages = m_xExtensionManager->getAllExtensions( uno::Reference< task::XAbortChannel >(),
+                                                              uno::Reference< ucb::XCommandEnvironment >() );
+    } catch ( const deployment::DeploymentException & ) {
+        return;
+    } catch ( const ucb::CommandFailedException & ) {
+        return;
+    } catch ( const ucb::CommandAbortedException & ) {
+        return;
+    } catch ( const lang::IllegalArgumentException & e ) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw css::lang::WrappedTargetRuntimeException( e.Message,
+                        e.Context, anyEx );
+    }
+
+    for ( uno::Sequence< uno::Reference< deployment::XPackage > > const & xPackageList : std::as_const(xAllPackages) )
+    {
+        for ( uno::Reference< deployment::XPackage > const & xPackage : xPackageList )
+        {
+            if ( xPackage.is() )
+            {
+                PackageState eState = getPackageState( xPackage );
+                getDialogHelper()->addPackageToList( xPackage );
+                // When the package is enabled, we can stop here, otherwise we have to look for
+                // another version of this package
+                if ( ( eState == REGISTERED ) || ( eState == NOT_AVAILABLE ) )
+                    break;
+            }
+        }
+    }
+
+    const uno::Sequence< uno::Reference< deployment::XPackage > > xNoLicPackages = m_xExtensionManager->getExtensionsWithUnacceptedLicenses( SHARED_PACKAGE_MANAGER,
+                                                                               uno::Reference< ucb::XCommandEnvironment >() );
+    for ( uno::Reference< deployment::XPackage > const & xPackage : xNoLicPackages )
+    {
+        if ( xPackage.is() )
+        {
+            getDialogHelper()->addPackageToList( xPackage, true );
+        }
+    }
+}
+
+
+PackageState TheExtensionManager::getPackageState( const uno::Reference< deployment::XPackage > &xPackage )
+{
+    try {
+        beans::Optional< beans::Ambiguous< sal_Bool > > option(
+            xPackage->isRegistered( uno::Reference< task::XAbortChannel >(),
+                                    uno::Reference< ucb::XCommandEnvironment >() ) );
+        if ( option.IsPresent )
+        {
+            ::beans::Ambiguous< sal_Bool > const & reg = option.Value;
+            if ( reg.IsAmbiguous )
+                return AMBIGUOUS;
+            else
+                return reg.Value ? REGISTERED : NOT_REGISTERED;
+        }
+        else
+            return NOT_AVAILABLE;
+    }
+    catch ( const uno::RuntimeException & ) {
+        throw;
+    }
+    catch (const uno::Exception &) {
+        TOOLS_WARN_EXCEPTION( "desktop", "" );
+        return NOT_AVAILABLE;
+    }
+}
+
+
+bool TheExtensionManager::isReadOnly( const uno::Reference< deployment::XPackage > &xPackage ) const
+{
+    if ( m_xExtensionManager.is() && xPackage.is() )
+    {
+        return m_xExtensionManager->isReadOnlyRepository( xPackage->getRepositoryName() );
+    }
+    else
+        return true;
+}
+
+
+// The function investigates if the extension supports options.
+bool TheExtensionManager::supportsOptions( const uno::Reference< deployment::XPackage > &xPackage ) const
+{
+    bool bOptions = false;
+
+    if ( ! xPackage->isBundle() )
+        return false;
+
+    beans::Optional< OUString > aId = xPackage->getIdentifier();
+
+    //a bundle must always have an id
+    OSL_ASSERT( aId.IsPresent );
+
+    //iterate over all available nodes
+    const uno::Sequence< OUString > seqNames = m_xNameAccessNodes->getElementNames();
+
+    for ( OUString const & nodeName : seqNames )
+    {
+        uno::Any anyNode = m_xNameAccessNodes->getByName( nodeName );
+        //If we have a node then it must contain the set of leaves. This is part of OptionsDialog.xcs
+        uno::Reference< XInterface> xIntNode = anyNode.get< uno::Reference< XInterface > >();
+        uno::Reference< container::XNameAccess > xNode( xIntNode, uno::UNO_QUERY_THROW );
+
+        uno::Any anyLeaves = xNode->getByName("Leaves");
+        uno::Reference< XInterface > xIntLeaves = anyLeaves.get< uno::Reference< XInterface > >();
+        uno::Reference< container::XNameAccess > xLeaves( xIntLeaves, uno::UNO_QUERY_THROW );
+
+        //iterate over all available leaves
+        const uno::Sequence< OUString > seqLeafNames = xLeaves->getElementNames();
+        for ( OUString const & leafName : seqLeafNames )
+        {
+            uno::Any anyLeaf = xLeaves->getByName( leafName );
+            uno::Reference< XInterface > xIntLeaf = anyLeaf.get< uno::Reference< XInterface > >();
+            uno::Reference< beans::XPropertySet > xLeaf( xIntLeaf, uno::UNO_QUERY_THROW );
+            //investigate the Id property if it matches the extension identifier which
+            //has been passed in.
+            uno::Any anyValue = xLeaf->getPropertyValue("Id");
+
+            OUString sId = anyValue.get< OUString >();
+            if ( sId == aId.Value )
+            {
+                bOptions = true;
+                break;
+            }
+        }
+        if ( bOptions )
+            break;
+    }
+    return bOptions;
+}
+
+
+// XEventListener
+void TheExtensionManager::disposing( lang::EventObject const & rEvt )
+{
+    bool shutDown = (rEvt.Source == m_xDesktop);
+
+    if ( shutDown && m_xDesktop.is() )
+    {
+        m_xDesktop->removeTerminateListener( this );
+        m_xDesktop.clear();
+    }
+
+    if ( !shutDown )
+        return;
+
+    if ( dp_misc::office_is_running() )
+    {
+        const SolarMutexGuard guard;
+        if (m_xExtMgrDialog)
+        {
+            if (m_bExtMgrDialogExecuting)
+                m_xExtMgrDialog->response(RET_CANCEL);
+            else
+            {
+                m_xExtMgrDialog->Close();
+                m_xExtMgrDialog.reset();
+            }
+        }
+        assert(!m_xExtMgrDialog);
+        if (m_xUpdReqDialog)
+            m_xUpdReqDialog->response(RET_CANCEL);
+        assert(!m_xUpdReqDialog);
+    }
+    s_ExtMgr.clear();
+}
+
+// XTerminateListener
+void TheExtensionManager::queryTermination( ::lang::EventObject const & )
+{
+    DialogHelper *pDialogHelper = getDialogHelper();
+
+    if ( m_xExecuteCmdQueue->isBusy() || ( pDialogHelper && pDialogHelper->isBusy() ) )
+    {
+        ToTop();
+        throw frame::TerminationVetoException(
+            "The office cannot be closed while the Extension Manager is running",
+            static_cast<frame::XTerminateListener*>(this));
+    }
+    else
+    {
+        clearModified();
+        if (m_xExtMgrDialog)
+        {
+            if (m_bExtMgrDialogExecuting)
+                m_xExtMgrDialog->response(RET_CANCEL);
+            else
+            {
+                m_xExtMgrDialog->Close();
+                m_xExtMgrDialog.reset();
+            }
+        }
+        if (m_xUpdReqDialog)
+            m_xUpdReqDialog->response(RET_CANCEL);
+    }
+}
+
+void TheExtensionManager::notifyTermination( ::lang::EventObject const & rEvt )
+{
+    disposing( rEvt );
+}
+
+// XModifyListener
+void TheExtensionManager::modified( ::lang::EventObject const & /*rEvt*/ )
+{
+    m_bModified = true;
+    DialogHelper *pDialogHelper = getDialogHelper();
+    if (!pDialogHelper)
+        return;
+    pDialogHelper->prepareChecking();
+    createPackageList();
+    pDialogHelper->checkEntries();
+}
+
+
+::rtl::Reference< TheExtensionManager > TheExtensionManager::get( const uno::Reference< uno::XComponentContext > &xContext,
+                                                                  const uno::Reference< awt::XWindow > &xParent,
+                                                                  const OUString & extensionURL )
+{
+    if ( s_ExtMgr.is() )
+    {
+        OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
+        if ( !extensionURL.isEmpty() )
+            s_ExtMgr->installPackage( extensionURL, true );
+        return s_ExtMgr;
+    }
+
+    ::rtl::Reference<TheExtensionManager> that( new TheExtensionManager( xParent, xContext ) );
+
+    const SolarMutexGuard guard;
+    if ( ! s_ExtMgr.is() )
+    {
+        OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
+        s_ExtMgr = that;
+    }
+
+    if ( !extensionURL.isEmpty() )
+        s_ExtMgr->installPackage( extensionURL, true );
+
+    return s_ExtMgr;
+}
+
+} //namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_theextmgr.hxx b/desktop/source/deployment/gui/dp_gui_theextmgr.hxx
new file mode 100644
index 000000000..13c329d6d
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_theextmgr.hxx
@@ -0,0 +1,127 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <cppuhelper/implbase.hxx>
+
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/deployment/XExtensionManager.hpp>
+#include <com/sun/star/frame/XDesktop2.hpp>
+#include <com/sun/star/frame/XTerminateListener.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/util/XModifyListener.hpp>
+
+#include "dp_gui.h"
+#include "dp_gui_dialog2.hxx"
+
+
+namespace dp_gui {
+
+
+class ExtensionCmdQueue;
+
+
+class TheExtensionManager :
+    public ::cppu::WeakImplHelper< css::frame::XTerminateListener,
+                                    css::util::XModifyListener >
+{
+private:
+    css::uno::Reference< css::uno::XComponentContext >        m_xContext;
+    css::uno::Reference< css::frame::XDesktop2 >              m_xDesktop;
+    css::uno::Reference< css::deployment::XExtensionManager > m_xExtensionManager;
+    css::uno::Reference< css::container::XNameAccess >        m_xNameAccessNodes;
+    css::uno::Reference< css::awt::XWindow >                  m_xParent;
+    std::shared_ptr<ExtMgrDialog> m_xExtMgrDialog;
+    std::unique_ptr<UpdateRequiredDialog> m_xUpdReqDialog;
+    std::unique_ptr<ExtensionCmdQueue> m_xExecuteCmdQueue;
+
+    OUString                     m_sGetExtensionsURL;
+    bool                         m_bModified;
+    bool                         m_bExtMgrDialogExecuting;
+
+public:
+    static ::rtl::Reference<TheExtensionManager> s_ExtMgr;
+
+         TheExtensionManager( css::uno::Reference< css::awt::XWindow > xParent,
+                              const css::uno::Reference< css::uno::XComponentContext > &xContext );
+        virtual ~TheExtensionManager() override;
+
+    void createDialog( const bool bCreateUpdDlg );
+    sal_Int16 execute();
+
+    bool isModified() const { return m_bModified; }
+    void clearModified() { m_bModified = false; }
+
+    weld::Window* getDialog()
+    {
+        if (m_xExtMgrDialog)
+            return m_xExtMgrDialog->getDialog();
+        if (m_xUpdReqDialog)
+            return m_xUpdReqDialog->getDialog();
+        return nullptr;
+    }
+    DialogHelper* getDialogHelper()
+    {
+        if (m_xExtMgrDialog)
+            return m_xExtMgrDialog.get();
+        return m_xUpdReqDialog.get();
+    }
+    ExtensionCmdQueue* getCmdQueue() const { return m_xExecuteCmdQueue.get(); }
+
+    void SetText( const OUString &rTitle );
+    void Show();
+    void ToTop();
+    void Close();
+    bool isVisible();
+
+
+    void checkUpdates();
+    bool installPackage( const OUString &rPackageURL, bool bWarnUser = false );
+    void createPackageList();
+
+    void terminateDialog();
+
+    // Tools
+    bool supportsOptions( const css::uno::Reference< css::deployment::XPackage > &xPackage ) const;
+    static PackageState getPackageState( const css::uno::Reference< css::deployment::XPackage > &xPackage );
+    const css::uno::Reference< css::uno::XComponentContext >& getContext() const { return m_xContext; }
+    const css::uno::Reference< css::deployment::XExtensionManager >& getExtensionManager() const { return m_xExtensionManager; }
+    bool isReadOnly( const css::uno::Reference< css::deployment::XPackage > &xPackage ) const;
+
+
+    static ::rtl::Reference<TheExtensionManager> get(
+        css::uno::Reference< css::uno::XComponentContext> const & xContext,
+        css::uno::Reference< css::awt::XWindow> const & xParent = nullptr,
+        OUString const & view = OUString() );
+
+    // XEventListener
+    virtual void SAL_CALL disposing( css::lang::EventObject const & evt ) override;
+
+    // XTerminateListener
+    virtual void SAL_CALL queryTermination( css::lang::EventObject const & evt ) override;
+    virtual void SAL_CALL notifyTermination( css::lang::EventObject const & evt ) override;
+
+    // XModifyListener
+    virtual void SAL_CALL modified( css::lang::EventObject const & evt ) override;
+};
+
+} // namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_updatedata.hxx b/desktop/source/deployment/gui/dp_gui_updatedata.hxx
new file mode 100644
index 000000000..efac4c587
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_updatedata.hxx
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#pragma once
+
+#include <sal/config.h>
+#include <rtl/ustring.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+#include <utility>
+
+namespace com::sun::star::deployment {
+        class XPackage;
+}
+namespace com::sun::star::xml::dom {
+        class XNode;
+}
+
+
+namespace dp_gui {
+
+struct UpdateData
+{
+    explicit UpdateData( css::uno::Reference< css::deployment::XPackage > xExt):
+        bIsShared(false), aInstalledPackage(std::move(xExt)) {};
+
+    //When entries added to the listbox then there can be one for the user update and one
+    //for the shared update. However, both list entries will contain the same UpdateData.
+    //isShared is used to indicate which one is used for the shared entry.
+    bool bIsShared;
+
+    //The currently installed extension which is going to be updated. If the extension exist in
+    //multiple repositories then it is the one with the highest version.
+    css::uno::Reference< css::deployment::XPackage > aInstalledPackage;
+
+    //The version of the update
+    OUString updateVersion;
+
+    //For online update
+
+    // The content of the update information.
+    //Only if aUpdateInfo is set then there is an online update available with a better version
+    //than any of the currently installed extensions with the same identifier.
+    css::uno::Reference< css::xml::dom::XNode > aUpdateInfo;
+    //The URL of the locally downloaded extension. It will only be set if there were no errors
+    //during the download
+    OUString sLocalURL;
+    //The URL of the website where the download can be obtained.
+    OUString sWebsiteURL;
+
+    //For local update
+
+    //The locale extension which is used as update for the user or shared repository.
+    //If set then the data for the online update (aUpdateInfo, sLocalURL, sWebsiteURL)
+    //are to be ignored.
+    css::uno::Reference< css::deployment::XPackage >  aUpdateSource;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_updatedialog.cxx b/desktop/source/deployment/gui/dp_gui_updatedialog.cxx
new file mode 100644
index 000000000..2861d7785
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_updatedialog.cxx
@@ -0,0 +1,994 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <sal/config.h>
+
+#include <utility>
+#include <vector>
+
+
+#include <optional>
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/deployment/UpdateInformationProvider.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/deployment/XUpdateInformationProvider.hpp>
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/frame/XDispatch.hpp>
+#include <com/sun/star/frame/XDispatchProvider.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/task/InteractionHandler.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Exception.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/util/URL.hpp>
+#include <com/sun/star/util/URLTransformer.hpp>
+#include <com/sun/star/util/XURLTransformer.hpp>
+#include <com/sun/star/xml/dom/XElement.hpp>
+#include <osl/diagnose.h>
+#include <rtl/ref.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <salhelper/thread.hxx>
+#include <tools/gen.hxx>
+#include <tools/link.hxx>
+#include <unotools/configmgr.hxx>
+#include <vcl/svapp.hxx>
+
+#include <comphelper/processfactory.hxx>
+#include <comphelper/propertyvalue.hxx>
+
+#include <dp_dependencies.hxx>
+#include <dp_descriptioninfoset.hxx>
+#include <dp_identifier.hxx>
+#include <dp_misc.h>
+#include <dp_update.hxx>
+
+#include <strings.hrc>
+#include "dp_gui_updatedata.hxx"
+#include "dp_gui_updatedialog.hxx"
+#include <dp_shared.hxx>
+
+class KeyEvent;
+class MouseEvent;
+namespace com::sun::star::uno {
+    class XComponentContext;
+}
+
+using namespace ::com::sun::star;
+using dp_gui::UpdateDialog;
+
+namespace {
+
+sal_Unicode const LF = 0x000A;
+sal_Unicode const CR = 0x000D;
+
+constexpr OUStringLiteral IGNORED_UPDATES = u"/org.openoffice.Office.ExtensionManager/ExtensionUpdateData/IgnoredUpdates";
+constexpr OUStringLiteral PROPERTY_VERSION = u"Version";
+
+enum Kind { ENABLED_UPDATE, DISABLED_UPDATE, SPECIFIC_ERROR };
+
+OUString confineToParagraph(OUString const & text) {
+    // Confine arbitrary text to a single paragraph in a VclMultiLineEdit
+    // This assumes that U+000A and U+000D are the only paragraph separators in
+    // a VclMultiLineEdit, and that replacing them with a single space
+    // each is acceptable:
+    return text.replace(LF, ' ').replace(CR, ' ');
+}
+}
+
+struct UpdateDialog::DisabledUpdate {
+    OUString                  name;
+    uno::Sequence< OUString > unsatisfiedDependencies;
+    // We also want to show release notes and publisher for disabled updates
+    css::uno::Reference< css::xml::dom::XNode > aUpdateInfo;
+};
+
+struct UpdateDialog::SpecificError {
+    OUString name;
+    OUString message;
+};
+
+
+struct UpdateDialog::IgnoredUpdate {
+    OUString sExtensionID;
+    OUString sVersion;
+
+    IgnoredUpdate( OUString aExtensionID, OUString aVersion );
+};
+
+
+UpdateDialog::IgnoredUpdate::IgnoredUpdate( OUString aExtensionID, OUString aVersion ):
+    sExtensionID(std::move( aExtensionID )),
+    sVersion(std::move( aVersion ))
+{}
+
+
+struct UpdateDialog::Index
+{
+    Kind          m_eKind;
+    bool          m_bIgnored;
+    sal_uInt16    m_nIndex;
+    OUString      m_aName;
+
+    Index( Kind theKind, sal_uInt16 nIndex, OUString aName ) :
+        m_eKind( theKind ),
+        m_bIgnored( false ),
+        m_nIndex( nIndex ),
+        m_aName(std::move( aName )) {}
+};
+
+
+class UpdateDialog::Thread: public salhelper::Thread {
+public:
+    Thread(
+        uno::Reference< uno::XComponentContext > const & context,
+        UpdateDialog & dialog,
+        std::vector< uno::Reference< deployment::XPackage >  > && vExtensionList);
+
+    void stop();
+
+private:
+    virtual ~Thread() override;
+
+    virtual void execute() override;
+
+    void handleSpecificError(
+        uno::Reference< deployment::XPackage > const & package,
+        uno::Any const & exception) const;
+
+    OUString getUpdateDisplayString(
+        dp_gui::UpdateData const & data, std::u16string_view version = std::u16string_view()) const;
+
+    void prepareUpdateData(
+        css::uno::Reference< css::xml::dom::XNode > const & updateInfo,
+        UpdateDialog::DisabledUpdate & out_du,
+        dp_gui::UpdateData & out_data) const;
+
+    bool update(
+        UpdateDialog::DisabledUpdate const & du,
+        dp_gui::UpdateData const & data) const;
+
+    uno::Reference< uno::XComponentContext > m_context;
+    UpdateDialog & m_dialog;
+    std::vector< uno::Reference< deployment::XPackage > > m_vExtensionList;
+    uno::Reference< deployment::XUpdateInformationProvider > m_updateInformation;
+    uno::Reference< task::XInteractionHandler > m_xInteractionHdl;
+
+    // guarded by Application::GetSolarMutex():
+    bool m_stop;
+};
+
+UpdateDialog::Thread::Thread(
+    uno::Reference< uno::XComponentContext > const & context,
+    UpdateDialog & dialog,
+    std::vector< uno::Reference< deployment::XPackage > >&& vExtensionList):
+    salhelper::Thread("dp_gui_updatedialog"),
+    m_context(context),
+    m_dialog(dialog),
+    m_vExtensionList(std::move(vExtensionList)),
+    m_updateInformation(
+        deployment::UpdateInformationProvider::create(context)),
+    m_stop(false)
+{
+    if( m_context.is() )
+    {
+        m_xInteractionHdl =
+            task::InteractionHandler::createWithParent(m_context, dialog.getDialog()->GetXWindow());
+        m_updateInformation->setInteractionHandler( m_xInteractionHdl );
+    }
+}
+
+void UpdateDialog::Thread::stop() {
+    {
+        SolarMutexGuard g;
+        m_stop = true;
+    }
+    m_updateInformation->cancel();
+}
+
+UpdateDialog::Thread::~Thread()
+{
+    if ( m_xInteractionHdl.is() )
+        m_updateInformation->setInteractionHandler( uno::Reference< task::XInteractionHandler > () );
+}
+
+void UpdateDialog::Thread::execute()
+{
+    {
+        SolarMutexGuard g;
+        if ( m_stop ) {
+            return;
+        }
+    }
+    uno::Reference<deployment::XExtensionManager> extMgr =
+        deployment::ExtensionManager::get(m_context);
+
+    std::vector<std::pair<uno::Reference<deployment::XPackage>, uno::Any > > errors;
+
+    dp_misc::UpdateInfoMap updateInfoMap = dp_misc::getOnlineUpdateInfos(
+        m_context, extMgr, m_updateInformation, &m_vExtensionList, errors);
+
+    for (auto const& elem : errors)
+        handleSpecificError(elem.first, elem.second);
+
+    for (auto const& updateInfo : updateInfoMap)
+    {
+        dp_misc::UpdateInfo const & info = updateInfo.second;
+        UpdateData updateData(info.extension);
+        DisabledUpdate disableUpdate;
+        //determine if online updates meet the requirements
+        prepareUpdateData(info.info, disableUpdate, updateData);
+
+        //determine if the update is installed in the user or shared repository
+        OUString sOnlineVersion;
+        if (info.info.is())
+            sOnlineVersion = info.version;
+        OUString sVersionUser;
+        OUString sVersionShared;
+        OUString sVersionBundled;
+        uno::Sequence< uno::Reference< deployment::XPackage> > extensions;
+        try {
+            extensions = extMgr->getExtensionsWithSameIdentifier(
+                dp_misc::getIdentifier(info.extension), info.extension->getName(),
+                uno::Reference<ucb::XCommandEnvironment>());
+        } catch ( const lang::IllegalArgumentException& ) {
+            OSL_ASSERT(false);
+            continue;
+        } catch ( const css::ucb::CommandFailedException& ) {
+            OSL_ASSERT(false);
+            continue;
+        }
+        OSL_ASSERT(extensions.getLength() == 3);
+        if (extensions[0].is() )
+            sVersionUser = extensions[0]->getVersion();
+        if (extensions[1].is() )
+            sVersionShared = extensions[1]->getVersion();
+        if (extensions[2].is() )
+            sVersionBundled = extensions[2]->getVersion();
+
+        bool bSharedReadOnly = extMgr->isReadOnlyRepository("shared");
+
+        dp_misc::UPDATE_SOURCE sourceUser = dp_misc::isUpdateUserExtension(
+            bSharedReadOnly, sVersionUser, sVersionShared, sVersionBundled, sOnlineVersion);
+        dp_misc::UPDATE_SOURCE sourceShared = dp_misc::isUpdateSharedExtension(
+            bSharedReadOnly, sVersionShared, sVersionBundled, sOnlineVersion);
+
+        if (sourceUser != dp_misc::UPDATE_SOURCE_NONE)
+        {
+            if (sourceUser == dp_misc::UPDATE_SOURCE_SHARED)
+            {
+                updateData.aUpdateSource = extensions[1];
+                updateData.updateVersion = extensions[1]->getVersion();
+            }
+            else if (sourceUser == dp_misc::UPDATE_SOURCE_BUNDLED)
+            {
+                updateData.aUpdateSource = extensions[2];
+                updateData.updateVersion = extensions[2]->getVersion();
+            }
+            if (!update(disableUpdate, updateData))
+                return;
+        }
+
+        if (sourceShared != dp_misc::UPDATE_SOURCE_NONE)
+        {
+            if (sourceShared == dp_misc::UPDATE_SOURCE_BUNDLED)
+            {
+                updateData.aUpdateSource = extensions[2];
+                updateData.updateVersion = extensions[2]->getVersion();
+            }
+            updateData.bIsShared = true;
+            if (!update(disableUpdate, updateData))
+                return;
+        }
+    }
+
+
+    SolarMutexGuard g;
+    if (!m_stop) {
+        m_dialog.checkingDone();
+    }
+}
+
+//Parameter package can be null
+void UpdateDialog::Thread::handleSpecificError(
+    uno::Reference< deployment::XPackage > const & package,
+    uno::Any const & exception) const
+{
+    UpdateDialog::SpecificError data;
+    if (package.is())
+        data.name = package->getDisplayName();
+    uno::Exception e;
+    if (exception >>= e) {
+        data.message = e.Message;
+    }
+    SolarMutexGuard g;
+    if (!m_stop) {
+        m_dialog.addSpecificError(data);
+    }
+}
+
+OUString UpdateDialog::Thread::getUpdateDisplayString(
+    dp_gui::UpdateData const & data, std::u16string_view version) const
+{
+    OSL_ASSERT(data.aInstalledPackage.is());
+    OUStringBuffer b(data.aInstalledPackage->getDisplayName());
+    b.append(' ');
+    {
+        SolarMutexGuard g;
+        if(!m_stop)
+            b.append(m_dialog.m_version);
+    }
+    b.append(' ');
+    if (!version.empty())
+        b.append(version);
+    else
+        b.append(data.updateVersion);
+
+    if (!data.sWebsiteURL.isEmpty())
+    {
+        b.append(' ');
+        {
+            SolarMutexGuard g;
+            if(!m_stop)
+                b.append(m_dialog.m_browserbased);
+        }
+    }
+    return  b.makeStringAndClear();
+}
+
+/** out_data will only be filled if all dependencies are ok.
+ */
+void UpdateDialog::Thread::prepareUpdateData(
+    uno::Reference< xml::dom::XNode > const & updateInfo,
+    UpdateDialog::DisabledUpdate & out_du,
+    dp_gui::UpdateData & out_data) const
+{
+    if (!updateInfo.is())
+        return;
+    dp_misc::DescriptionInfoset infoset(m_context, updateInfo);
+    OSL_ASSERT(!infoset.getVersion().isEmpty());
+    uno::Sequence< uno::Reference< xml::dom::XElement > > ds(
+        dp_misc::Dependencies::check(infoset));
+
+    out_du.aUpdateInfo = updateInfo;
+    out_du.unsatisfiedDependencies.realloc(ds.getLength());
+    auto p_unsatisfiedDependencies = out_du.unsatisfiedDependencies.getArray();
+    for (sal_Int32 i = 0; i < ds.getLength(); ++i) {
+        p_unsatisfiedDependencies[i] = dp_misc::Dependencies::getErrorText(ds[i]);
+    }
+
+    const ::std::optional< OUString> updateWebsiteURL(infoset.getLocalizedUpdateWebsiteURL());
+
+    out_du.name = getUpdateDisplayString(out_data, infoset.getVersion());
+
+    if (!out_du.unsatisfiedDependencies.hasElements())
+    {
+        out_data.aUpdateInfo = updateInfo;
+        out_data.updateVersion = infoset.getVersion();
+        if (updateWebsiteURL)
+            out_data.sWebsiteURL = *updateWebsiteURL;
+    }
+}
+
+bool UpdateDialog::Thread::update(
+    UpdateDialog::DisabledUpdate const & du,
+    dp_gui::UpdateData const & data) const
+{
+    bool ret = false;
+    if (!du.unsatisfiedDependencies.hasElements())
+    {
+        SolarMutexGuard g;
+        if (!m_stop) {
+            m_dialog.addEnabledUpdate(getUpdateDisplayString(data), data);
+        }
+        ret = !m_stop;
+    } else {
+        SolarMutexGuard g;
+        if (!m_stop) {
+                m_dialog.addDisabledUpdate(du);
+        }
+        ret = !m_stop;
+    }
+    return ret;
+}
+
+// UpdateDialog ----------------------------------------------------------
+UpdateDialog::UpdateDialog(
+    uno::Reference< uno::XComponentContext > const & context,
+    weld::Window * parent, std::vector<uno::Reference< deployment::XPackage > > && vExtensionList,
+    std::vector< dp_gui::UpdateData > * updateData)
+    : GenericDialogController(parent, "desktop/ui/updatedialog.ui", "UpdateDialog")
+    , m_context(context)
+    , m_none(DpResId(RID_DLG_UPDATE_NONE))
+    , m_noInstallable(DpResId(RID_DLG_UPDATE_NOINSTALLABLE))
+    , m_failure(DpResId(RID_DLG_UPDATE_FAILURE))
+    , m_unknownError(DpResId(RID_DLG_UPDATE_UNKNOWNERROR))
+    , m_noDescription(DpResId(RID_DLG_UPDATE_NODESCRIPTION))
+    , m_noInstall(DpResId(RID_DLG_UPDATE_NOINSTALL))
+    , m_noDependency(DpResId(RID_DLG_UPDATE_NODEPENDENCY))
+    , m_noDependencyCurVer(DpResId(RID_DLG_UPDATE_NODEPENDENCY_CUR_VER))
+    , m_browserbased(DpResId(RID_DLG_UPDATE_BROWSERBASED))
+    , m_version(DpResId(RID_DLG_UPDATE_VERSION))
+    , m_ignoredUpdate(DpResId(RID_DLG_UPDATE_IGNORED_UPDATE))
+    , m_updateData(*updateData)
+    , m_thread(new UpdateDialog::Thread(context, *this, std::move(vExtensionList)))
+    , m_xChecking(m_xBuilder->weld_label("UPDATE_CHECKING"))
+    , m_xThrobber(m_xBuilder->weld_spinner("THROBBER"))
+    , m_xUpdate(m_xBuilder->weld_label("UPDATE_LABEL"))
+    , m_xUpdates(m_xBuilder->weld_tree_view("checklist"))
+    , m_xAll(m_xBuilder->weld_check_button("UPDATE_ALL"))
+    , m_xDescription(m_xBuilder->weld_label("DESCRIPTION_LABEL"))
+    , m_xPublisherLabel(m_xBuilder->weld_label("PUBLISHER_LABEL"))
+    , m_xPublisherLink(m_xBuilder->weld_link_button("PUBLISHER_LINK"))
+    , m_xReleaseNotesLabel(m_xBuilder->weld_label("RELEASE_NOTES_LABEL"))
+    , m_xReleaseNotesLink(m_xBuilder->weld_link_button("RELEASE_NOTES_LINK"))
+    , m_xDescriptions(m_xBuilder->weld_text_view("DESCRIPTIONS"))
+    , m_xOk(m_xBuilder->weld_button("ok"))
+    , m_xClose(m_xBuilder->weld_button("close"))
+    , m_xHelp(m_xBuilder->weld_button("help"))
+{
+    auto nWidth = m_xDescriptions->get_approximate_digit_width() * 62;
+    auto nHeight = m_xDescriptions->get_height_rows(8);
+    m_xDescriptions->set_size_request(nWidth, nHeight);
+    m_xUpdates->set_size_request(nWidth, nHeight);
+
+    m_xUpdates->enable_toggle_buttons(weld::ColumnToggleType::Check);
+
+    OSL_ASSERT(updateData != nullptr);
+
+    m_xExtensionManager = deployment::ExtensionManager::get( context );
+
+    m_xUpdates->connect_changed(LINK(this, UpdateDialog, selectionHandler));
+    m_xUpdates->connect_toggled(LINK(this, UpdateDialog, entryToggled));
+    m_xAll->connect_toggled(LINK(this, UpdateDialog, allHandler));
+    m_xOk->connect_clicked(LINK(this, UpdateDialog, okHandler));
+    m_xClose->connect_clicked(LINK(this, UpdateDialog, closeHandler));
+    if (!dp_misc::office_is_running())
+        m_xHelp->set_sensitive(false);
+
+    initDescription();
+    getIgnoredUpdates();
+}
+
+UpdateDialog::~UpdateDialog()
+{
+}
+
+short UpdateDialog::run() {
+    m_xThrobber->start();
+    m_thread->launch();
+    short nRet = GenericDialogController::run();
+    m_thread->stop();
+    return nRet;
+}
+
+IMPL_LINK(UpdateDialog, entryToggled, const weld::TreeView::iter_col&, rRowCol, void)
+{
+    // error's can't be enabled
+    const UpdateDialog::Index* p = weld::fromId<UpdateDialog::Index const *>(m_xUpdates->get_id(rRowCol.first));
+    if (p->m_eKind == SPECIFIC_ERROR)
+        m_xUpdates->set_toggle(rRowCol.first, TRISTATE_FALSE);
+
+    enableOk();
+}
+
+void UpdateDialog::insertItem(const UpdateDialog::Index *pEntry, bool bEnabledCheckBox)
+{
+    int nEntry = m_xUpdates->n_children();
+    m_xUpdates->append();
+    m_xUpdates->set_toggle(nEntry, bEnabledCheckBox ? TRISTATE_TRUE : TRISTATE_FALSE);
+    m_xUpdates->set_text(nEntry, pEntry->m_aName, 0);
+    m_xUpdates->set_id(nEntry, weld::toId(pEntry));
+}
+
+void UpdateDialog::addAdditional(const UpdateDialog::Index * index, bool bEnabledCheckBox)
+{
+    m_xAll->set_sensitive(true);
+    if (m_xAll->get_active())
+    {
+        insertItem(index, bEnabledCheckBox);
+        m_xUpdate->set_sensitive(true);
+        m_xUpdates->set_sensitive(true);
+        m_xDescription->set_sensitive(true);
+        m_xDescriptions->set_sensitive(true);
+    }
+}
+
+void UpdateDialog::addEnabledUpdate( OUString const & name,
+                                     dp_gui::UpdateData const & data )
+{
+    sal_uInt16 nIndex = sal::static_int_cast< sal_uInt16 >( m_enabledUpdates.size() );
+    UpdateDialog::Index *pEntry = new UpdateDialog::Index( ENABLED_UPDATE, nIndex, name );
+
+    m_enabledUpdates.push_back( data );
+    m_ListboxEntries.emplace_back( pEntry );
+
+    if (!isIgnoredUpdate(pEntry))
+    {
+        insertItem(pEntry, true);
+    }
+    else
+        addAdditional(pEntry, false);
+
+    m_xUpdate->set_sensitive(true);
+    m_xUpdates->set_sensitive(true);
+    m_xDescription->set_sensitive(true);
+    m_xDescriptions->set_sensitive(true);
+}
+
+void UpdateDialog::addDisabledUpdate( UpdateDialog::DisabledUpdate const & data )
+{
+    sal_uInt16 nIndex = sal::static_int_cast< sal_uInt16 >( m_disabledUpdates.size() );
+    UpdateDialog::Index *pEntry = new UpdateDialog::Index( DISABLED_UPDATE, nIndex, data.name );
+
+    m_disabledUpdates.push_back( data );
+    m_ListboxEntries.emplace_back( pEntry );
+
+    isIgnoredUpdate( pEntry );
+    addAdditional(pEntry, false);
+}
+
+void UpdateDialog::addSpecificError( UpdateDialog::SpecificError const & data )
+{
+    sal_uInt16 nIndex = sal::static_int_cast< sal_uInt16 >( m_specificErrors.size() );
+    UpdateDialog::Index *pEntry = new UpdateDialog::Index( SPECIFIC_ERROR, nIndex, data.name );
+
+    m_specificErrors.push_back( data );
+    m_ListboxEntries.emplace_back( pEntry );
+
+    addAdditional(pEntry, false);
+}
+
+void UpdateDialog::checkingDone() {
+    m_xChecking->hide();
+    m_xThrobber->stop();
+    m_xThrobber->hide();
+    if (m_xUpdates->n_children() == 0)
+    {
+        clearDescription();
+        m_xDescription->set_sensitive(true);
+        m_xDescriptions->set_sensitive(true);
+
+        if ( m_disabledUpdates.empty() && m_specificErrors.empty() && m_ignoredUpdates.empty() )
+            showDescription( m_none );
+        else
+            showDescription( m_noInstallable );
+    }
+
+    enableOk();
+}
+
+void UpdateDialog::enableOk() {
+    if (!m_xChecking->get_visible()) {
+        int nChecked = 0;
+        for (int i = 0, nCount = m_xUpdates->n_children(); i < nCount; ++i) {
+            if (m_xUpdates->get_toggle(i) == TRISTATE_TRUE)
+                ++nChecked;
+        }
+        m_xOk->set_sensitive(nChecked != 0);
+    }
+}
+
+// *********************************************************************************
+void UpdateDialog::createNotifyJob( bool bPrepareOnly,
+    uno::Sequence< uno::Sequence< OUString > > const &rItemList )
+{
+    if ( !dp_misc::office_is_running() )
+        return;
+
+    // notify update check job
+    try
+    {
+        uno::Reference< lang::XMultiServiceFactory > xConfigProvider(
+            configuration::theDefaultProvider::get(
+                comphelper::getProcessComponentContext()));
+
+        uno::Sequence< uno::Any > aArgumentList{ uno::Any(comphelper::makePropertyValue(
+            "nodepath",
+            OUString("org.openoffice.Office.Addons/AddonUI/OfficeHelp/UpdateCheckJob"))) };
+
+        uno::Reference< container::XNameAccess > xNameAccess(
+            xConfigProvider->createInstanceWithArguments(
+                "com.sun.star.configuration.ConfigurationAccess", aArgumentList ),
+            uno::UNO_QUERY_THROW );
+
+        util::URL aURL;
+        xNameAccess->getByName("URL") >>= aURL.Complete;
+
+        uno::Reference< uno::XComponentContext > xContext( ::comphelper::getProcessComponentContext() );
+        uno::Reference < util::XURLTransformer > xTransformer = util::URLTransformer::create(xContext);
+
+        xTransformer->parseStrict(aURL);
+
+        uno::Reference < frame::XDesktop2 > xDesktop = frame::Desktop::create( xContext );
+        uno::Reference< frame::XDispatchProvider > xDispatchProvider( xDesktop->getCurrentFrame(),
+            uno::UNO_QUERY_THROW );
+        uno::Reference< frame::XDispatch > xDispatch = xDispatchProvider->queryDispatch(aURL, OUString(), 0);
+
+        if( xDispatch.is() )
+        {
+            uno::Sequence aPropList{ comphelper::makePropertyValue("updateList", rItemList),
+                                     comphelper::makePropertyValue("prepareOnly", bPrepareOnly) };
+
+            xDispatch->dispatch(aURL, aPropList );
+        }
+    }
+    catch( const uno::Exception& e )
+    {
+        dp_misc::TRACE( "Caught exception: "
+            + e.Message + "\n thread terminated.\n\n");
+    }
+}
+
+// *********************************************************************************
+void UpdateDialog::notifyMenubar( bool bPrepareOnly, bool bRecheckOnly )
+{
+    if ( !dp_misc::office_is_running() )
+        return;
+
+    uno::Sequence< uno::Sequence< OUString > > aItemList;
+
+    if ( ! bRecheckOnly )
+    {
+        sal_Int32 nCount = 0;
+        for (sal_uInt16 i = 0, nItemCount = m_xUpdates->n_children(); i < nItemCount; ++i)
+        {
+
+            UpdateDialog::Index const * p = weld::fromId<UpdateDialog::Index const*>(m_xUpdates->get_id(i));
+
+            if ( p->m_eKind == ENABLED_UPDATE )
+            {
+                dp_gui::UpdateData aUpdData = m_enabledUpdates[ p->m_nIndex ];
+
+                dp_misc::DescriptionInfoset aInfoset( m_context, aUpdData.aUpdateInfo );
+                uno::Sequence< OUString > aItem
+                {
+                    dp_misc::getIdentifier( aUpdData.aInstalledPackage ),
+                    aInfoset.getVersion()
+                };
+                aItemList.realloc( nCount + 1 );
+                aItemList.getArray()[ nCount ] = aItem;
+                nCount += 1;
+            }
+            else
+                continue;
+        }
+    }
+
+    createNotifyJob( bPrepareOnly, aItemList );
+}
+
+// *********************************************************************************
+
+void UpdateDialog::initDescription()
+{
+    m_xPublisherLabel->hide();
+    m_xPublisherLink->hide();
+    m_xReleaseNotesLabel->hide();
+    m_xReleaseNotesLink->hide();
+}
+
+void UpdateDialog::clearDescription()
+{
+    m_xPublisherLabel->hide();
+    m_xPublisherLink->hide();
+    m_xPublisherLink->set_label("");
+    m_xPublisherLink->set_uri("");
+    m_xReleaseNotesLabel->hide();
+    m_xReleaseNotesLink->hide();
+    m_xReleaseNotesLink->set_uri( "" );
+    m_xDescriptions->set_text("");
+}
+
+bool UpdateDialog::showDescription(uno::Reference< xml::dom::XNode > const & aUpdateInfo)
+{
+    dp_misc::DescriptionInfoset infoset(m_context, aUpdateInfo);
+    return showDescription(infoset.getLocalizedPublisherNameAndURL(),
+                           infoset.getLocalizedReleaseNotesURL());
+}
+
+bool UpdateDialog::showDescription(uno::Reference< deployment::XPackage > const & aExtension)
+{
+    OSL_ASSERT(aExtension.is());
+    beans::StringPair pubInfo = aExtension->getPublisherInfo();
+    return showDescription(std::make_pair(pubInfo.First, pubInfo.Second),
+                           "");
+}
+
+bool UpdateDialog::showDescription(std::pair< OUString, OUString > const & pairPublisher,
+                                   OUString const & sReleaseNotes)
+{
+    OUString sPub = pairPublisher.first;
+    OUString sURL = pairPublisher.second;
+
+    if ( sPub.isEmpty() && sURL.isEmpty() && sReleaseNotes.isEmpty() )
+        // nothing to show
+        return false;
+
+    if ( !sPub.isEmpty() )
+    {
+        m_xPublisherLabel->show();
+        m_xPublisherLink->show();
+        m_xPublisherLink->set_label(sPub);
+        m_xPublisherLink->set_uri(sURL);
+    }
+
+    if ( !sReleaseNotes.isEmpty() )
+    {
+        m_xReleaseNotesLabel->show();
+        m_xReleaseNotesLink->show();
+        m_xReleaseNotesLink->set_uri( sReleaseNotes );
+    }
+    return true;
+}
+
+bool UpdateDialog::showDescription( const OUString& rDescription)
+{
+    if ( rDescription.isEmpty() )
+        // nothing to show
+        return false;
+
+    m_xDescriptions->set_text(rDescription);
+    return true;
+}
+
+void UpdateDialog::getIgnoredUpdates()
+{
+    uno::Reference< lang::XMultiServiceFactory > xConfig(
+        configuration::theDefaultProvider::get(m_context));
+    beans::NamedValue aValue( "nodepath", uno::Any( OUString(IGNORED_UPDATES) ) );
+    uno::Sequence< uno::Any > args{ uno::Any(aValue) };
+
+    uno::Reference< container::XNameAccess > xNameAccess( xConfig->createInstanceWithArguments( "com.sun.star.configuration.ConfigurationAccess", args), uno::UNO_QUERY_THROW );
+    const uno::Sequence< OUString > aElementNames = xNameAccess->getElementNames();
+
+    for ( OUString const & aIdentifier : aElementNames )
+    {
+        OUString aVersion;
+
+        uno::Any aPropValue( uno::Reference< beans::XPropertySet >( xNameAccess->getByName( aIdentifier ), uno::UNO_QUERY_THROW )->getPropertyValue( PROPERTY_VERSION ) );
+        aPropValue >>= aVersion;
+        IgnoredUpdate *pData = new IgnoredUpdate( aIdentifier, aVersion );
+        m_ignoredUpdates.emplace_back( pData );
+    }
+}
+
+
+bool UpdateDialog::isIgnoredUpdate( UpdateDialog::Index * index )
+{
+    bool bIsIgnored = false;
+
+    if (! m_ignoredUpdates.empty() )
+    {
+        OUString aExtensionID;
+        OUString aVersion;
+
+        if ( index->m_eKind == ENABLED_UPDATE )
+        {
+            dp_gui::UpdateData aUpdData = m_enabledUpdates[ index->m_nIndex ];
+            aExtensionID = dp_misc::getIdentifier( aUpdData.aInstalledPackage );
+            aVersion = aUpdData.updateVersion;
+        }
+        else if ( index->m_eKind == DISABLED_UPDATE )
+        {
+            DisabledUpdate &rData = m_disabledUpdates[ index->m_nIndex ];
+            dp_misc::DescriptionInfoset aInfoset( m_context, rData.aUpdateInfo );
+            ::std::optional< OUString > aID( aInfoset.getIdentifier() );
+            if ( aID )
+                aExtensionID = *aID;
+            aVersion = aInfoset.getVersion();
+        }
+
+        for (auto const& ignoredUpdate : m_ignoredUpdates)
+        {
+            if ( ignoredUpdate->sExtensionID == aExtensionID )
+            {
+                if ( ( !ignoredUpdate->sVersion.isEmpty() ) || ( ignoredUpdate->sVersion == aVersion ) )
+                {
+                    bIsIgnored = true;
+                    index->m_bIgnored = true;
+                }
+                break;
+            }
+        }
+    }
+
+    return bIsIgnored;
+}
+
+
+IMPL_LINK_NOARG(UpdateDialog, selectionHandler, weld::TreeView&, void)
+{
+    OUStringBuffer b;
+    int nSelectedPos = m_xUpdates->get_selected_index();
+    clearDescription();
+
+    const UpdateDialog::Index* p = nullptr;
+    if (nSelectedPos != -1)
+        p = weld::fromId<UpdateDialog::Index const*>(m_xUpdates->get_id(nSelectedPos));
+    if (p != nullptr)
+    {
+        sal_uInt16 pos = p->m_nIndex;
+
+        switch (p->m_eKind)
+        {
+            case ENABLED_UPDATE:
+            {
+                if ( m_enabledUpdates[ pos ].aUpdateSource.is() )
+                    showDescription( m_enabledUpdates[ pos ].aUpdateSource );
+                else
+                    showDescription( m_enabledUpdates[ pos ].aUpdateInfo );
+
+                if ( p->m_bIgnored )
+                    b.append( m_ignoredUpdate );
+
+                break;
+            }
+            case DISABLED_UPDATE:
+            {
+                if ( !m_disabledUpdates.empty() )
+                    showDescription( m_disabledUpdates[pos].aUpdateInfo );
+
+                if ( p->m_bIgnored )
+                    b.append( m_ignoredUpdate );
+
+                if ( m_disabledUpdates.empty() )
+                    break;
+
+                UpdateDialog::DisabledUpdate & data = m_disabledUpdates[ pos ];
+                if (data.unsatisfiedDependencies.hasElements())
+                {
+                    // create error string for version mismatch
+                    OUString sVersion( "%VERSION" );
+                    OUString sProductName( "%PRODUCTNAME" );
+                    sal_Int32 nPos = m_noDependencyCurVer.indexOf( sVersion );
+                    if ( nPos >= 0 )
+                    {
+                        m_noDependencyCurVer = m_noDependencyCurVer.replaceAt( nPos, sVersion.getLength(), utl::ConfigManager::getAboutBoxProductVersion() );
+                    }
+                    nPos = m_noDependencyCurVer.indexOf( sProductName );
+                    if ( nPos >= 0 )
+                    {
+                        m_noDependencyCurVer = m_noDependencyCurVer.replaceAt( nPos, sProductName.getLength(), utl::ConfigManager::getProductName() );
+                    }
+                    nPos = m_noDependency.indexOf( sProductName );
+                    if ( nPos >= 0 )
+                    {
+                        m_noDependency = m_noDependency.replaceAt( nPos, sProductName.getLength(), utl::ConfigManager::getProductName() );
+                    }
+
+                    b.append(m_noInstall);
+                    b.append(LF);
+                    b.append(m_noDependency);
+                    for (sal_Int32 i = 0;
+                         i < data.unsatisfiedDependencies.getLength(); ++i)
+                    {
+                        b.append(LF);
+                        b.append("  ");
+                            // U+2003 EM SPACE would be better than two spaces,
+                            // but some fonts do not contain it
+                        b.append(
+                            confineToParagraph(
+                                data.unsatisfiedDependencies[i]));
+                    }
+                    b.append(LF);
+                    b.append("  ");
+                    b.append(m_noDependencyCurVer);
+                }
+                break;
+            }
+            case SPECIFIC_ERROR:
+            {
+                UpdateDialog::SpecificError & data = m_specificErrors[ pos ];
+                b.append(m_failure);
+                b.append(LF);
+                b.append( data.message.isEmpty() ? m_unknownError : data.message );
+                break;
+            }
+            default:
+                OSL_ASSERT(false);
+                break;
+        }
+    }
+
+    if ( b.isEmpty() )
+        b.append( m_noDescription );
+
+    showDescription( b.makeStringAndClear() );
+}
+
+IMPL_LINK_NOARG(UpdateDialog, allHandler, weld::Toggleable&, void)
+{
+    if (m_xAll->get_active())
+    {
+        m_xUpdate->set_sensitive(true);
+        m_xUpdates->set_sensitive(true);
+        m_xDescription->set_sensitive(true);
+        m_xDescriptions->set_sensitive(true);
+
+        for (auto const& listboxEntry : m_ListboxEntries)
+        {
+            if ( listboxEntry->m_bIgnored || ( listboxEntry->m_eKind != ENABLED_UPDATE ) )
+                insertItem(listboxEntry.get(), false);
+        }
+    }
+    else
+    {
+        for (sal_uInt16 i = m_xUpdates->n_children(); i != 0 ;)
+        {
+            i -= 1;
+            UpdateDialog::Index const * p = weld::fromId<UpdateDialog::Index const*>(m_xUpdates->get_id(i));
+            if ( p->m_bIgnored || ( p->m_eKind != ENABLED_UPDATE ) )
+            {
+                m_xUpdates->remove(i);
+            }
+        }
+
+        if (m_xUpdates->n_children() == 0)
+        {
+            clearDescription();
+            m_xUpdate->set_sensitive(false);
+            m_xUpdates->set_sensitive(false);
+            if (m_xChecking->get_visible())
+                m_xDescription->set_sensitive(false);
+            else
+                showDescription(m_noInstallable);
+        }
+    }
+}
+
+IMPL_LINK_NOARG(UpdateDialog, okHandler, weld::Button&, void)
+{
+    //If users are going to update a shared extension then we need
+    //to warn them
+    for (auto const& enableUpdate : m_enabledUpdates)
+    {
+        OSL_ASSERT(enableUpdate.aInstalledPackage.is());
+        //If the user has no write access to the shared folder then the update
+        //for a shared extension is disable, that is it cannot be in m_enabledUpdates
+    }
+
+
+    for (sal_uInt16 i = 0, nCount = m_xUpdates->n_children(); i < nCount; ++i)
+    {
+        UpdateDialog::Index const * p =
+            weld::fromId<UpdateDialog::Index const*>(m_xUpdates->get_id(i));
+        if (p->m_eKind == ENABLED_UPDATE && m_xUpdates->get_toggle(i) == TRISTATE_TRUE) {
+            m_updateData.push_back( m_enabledUpdates[ p->m_nIndex ] );
+        }
+    }
+
+    m_xDialog->response(RET_OK);
+}
+
+IMPL_LINK_NOARG(UpdateDialog, closeHandler, weld::Button&, void)
+{
+    m_thread->stop();
+    m_xDialog->response(RET_CANCEL);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_updatedialog.hxx b/desktop/source/deployment/gui/dp_gui_updatedialog.hxx
new file mode 100644
index 000000000..cbf376955
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_updatedialog.hxx
@@ -0,0 +1,168 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vector>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <tools/link.hxx>
+#include <vcl/weld.hxx>
+
+#include "dp_gui_updatedata.hxx"
+
+/// @HTML
+
+class Image;
+class KeyEvent;
+class MouseEvent;
+class ResId;
+
+namespace com::sun::star {
+    namespace deployment { class XExtensionManager;
+                           class XPackage; }
+    namespace uno { class XComponentContext; }
+}
+
+namespace dp_gui {
+/**
+   The modal &ldquo;Check for Updates&rdquo; dialog.
+*/
+class UpdateDialog: public weld::GenericDialogController {
+public:
+    /**
+       Create an instance.
+
+       <p>Exactly one of <code>selectedPackages</code> and
+       <code>packageManagers</code> must be non-null.</p>
+
+       @param context
+       a non-null component context
+
+       @param parent
+       the parent window, may be null
+
+       @param vExtensionList
+       check for updates for the contained extensions. There must only be one extension with
+       a particular identifier. If one extension is installed in several repositories, then the
+       one with the highest version must be used, because it contains the latest known update
+       information.
+    */
+    UpdateDialog(
+        css::uno::Reference< css::uno::XComponentContext > const & context,
+        weld::Window * parent,
+        std::vector< css::uno::Reference< css::deployment::XPackage > > && vExtensionList,
+        std::vector< dp_gui::UpdateData > * updateData);
+
+    virtual ~UpdateDialog() override;
+
+    virtual short run() override;
+
+    void notifyMenubar( bool bPrepareOnly, bool bRecheckOnly );
+    static void createNotifyJob( bool bPrepareOnly,
+        css::uno::Sequence< css::uno::Sequence< OUString > > const &rItemList );
+
+private:
+    UpdateDialog(UpdateDialog const &) = delete;
+    UpdateDialog& operator =(UpdateDialog const &) = delete;
+
+    struct DisabledUpdate;
+    struct SpecificError;
+    struct IgnoredUpdate;
+    struct Index;
+    friend struct Index;
+    class Thread;
+    friend class Thread;
+
+    friend class CheckListBox;
+
+    void insertItem(const UpdateDialog::Index *pIndex, bool bEnableCheckBox);
+    void addAdditional(const UpdateDialog::Index *pIndex, bool bEnableCheckBox);
+    bool isIgnoredUpdate( UpdateDialog::Index *pIndex );
+
+    void addEnabledUpdate( OUString const & name, dp_gui::UpdateData const & data );
+    void addDisabledUpdate( UpdateDialog::DisabledUpdate const & data );
+    void addSpecificError( UpdateDialog::SpecificError const & data );
+
+    void checkingDone();
+
+    void enableOk();
+
+    void getIgnoredUpdates();
+
+    void initDescription();
+    void clearDescription();
+    bool showDescription(css::uno::Reference<
+                         css::deployment::XPackage > const & aExtension);
+    bool showDescription(std::pair< OUString, OUString > const & pairPublisher,
+                         OUString const & sReleaseNotes);
+    bool showDescription( css::uno::Reference<
+        css::xml::dom::XNode > const & aUpdateInfo);
+    bool showDescription( const OUString& rDescription);
+
+    DECL_LINK(selectionHandler, weld::TreeView&, void);
+    DECL_LINK(allHandler, weld::Toggleable&, void);
+    DECL_LINK(okHandler, weld::Button&, void);
+    DECL_LINK(closeHandler, weld::Button&, void);
+    DECL_LINK(entryToggled, const weld::TreeView::iter_col&, void);
+
+    css::uno::Reference< css::uno::XComponentContext >  m_context;
+    OUString m_none;
+    OUString m_noInstallable;
+    OUString m_failure;
+    OUString m_unknownError;
+    OUString m_noDescription;
+    OUString m_noInstall;
+    OUString m_noDependency;
+    OUString m_noDependencyCurVer;
+    OUString m_browserbased;
+    OUString m_version;
+    OUString m_ignoredUpdate;
+    std::vector< dp_gui::UpdateData > m_enabledUpdates;
+    std::vector< UpdateDialog::DisabledUpdate > m_disabledUpdates;
+    std::vector< UpdateDialog::SpecificError > m_specificErrors;
+    std::vector< std::unique_ptr<UpdateDialog::IgnoredUpdate> > m_ignoredUpdates;
+    std::vector< std::unique_ptr<Index> > m_ListboxEntries;
+    std::vector< dp_gui::UpdateData > & m_updateData;
+    rtl::Reference< UpdateDialog::Thread > m_thread;
+    css::uno::Reference< css::deployment::XExtensionManager > m_xExtensionManager;
+
+    std::unique_ptr<weld::Label> m_xChecking;
+    std::unique_ptr<weld::Spinner> m_xThrobber;
+    std::unique_ptr<weld::Label> m_xUpdate;
+    std::unique_ptr<weld::TreeView> m_xUpdates;
+    std::unique_ptr<weld::CheckButton> m_xAll;
+    std::unique_ptr<weld::Label> m_xDescription;
+    std::unique_ptr<weld::Label> m_xPublisherLabel;
+    std::unique_ptr<weld::LinkButton> m_xPublisherLink;
+    std::unique_ptr<weld::Label> m_xReleaseNotesLabel;
+    std::unique_ptr<weld::LinkButton> m_xReleaseNotesLink;
+    std::unique_ptr<weld::TextView> m_xDescriptions;
+    std::unique_ptr<weld::Button> m_xOk;
+    std::unique_ptr<weld::Button> m_xClose;
+    std::unique_ptr<weld::Button> m_xHelp;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_updateinstalldialog.cxx b/desktop/source/deployment/gui/dp_gui_updateinstalldialog.cxx
new file mode 100644
index 000000000..9b1aa423d
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_updateinstalldialog.cxx
@@ -0,0 +1,665 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include "dp_gui_updatedata.hxx"
+
+#include <sal/config.h>
+#include <osl/file.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <utility>
+#include <vcl/svapp.hxx>
+#include <cppuhelper/implbase.hxx>
+
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/lang/WrappedTargetException.hpp>
+#include <com/sun/star/ucb/NameClash.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/ucb/XProgressHandler.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/deployment/LicenseException.hpp>
+#include <com/sun/star/deployment/VersionException.hpp>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+
+#include <dp_descriptioninfoset.hxx>
+#include <strings.hrc>
+#include "dp_gui_updateinstalldialog.hxx"
+#include <dp_shared.hxx>
+#include <dp_ucb.h>
+#include <dp_misc.h>
+#include "dp_gui_extensioncmdqueue.hxx"
+#include <ucbhelper/content.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ref.hxx>
+#include <salhelper/thread.hxx>
+#include <com/sun/star/uno/Sequence.h>
+#include <comphelper/anytostring.hxx>
+
+#include <string_view>
+#include <vector>
+
+using dp_misc::StrTitle;
+
+namespace dp_gui {
+
+class UpdateInstallDialog::Thread: public salhelper::Thread {
+    friend class UpdateCommandEnv;
+public:
+    Thread(css::uno::Reference< css::uno::XComponentContext > const & ctx,
+        UpdateInstallDialog & dialog, std::vector< dp_gui::UpdateData > & aVecUpdateData);
+
+    void stop();
+
+private:
+    virtual ~Thread() override;
+
+    virtual void execute() override;
+    void downloadExtensions();
+    bool download(OUString const & aUrls, UpdateData & aUpdatData);
+    void installExtensions();
+    void removeTempDownloads();
+
+    UpdateInstallDialog & m_dialog;
+
+    // guarded by Application::GetSolarMutex():
+    css::uno::Reference< css::task::XAbortChannel > m_abort;
+    css::uno::Reference< css::uno::XComponentContext > m_xComponentContext;
+    std::vector< dp_gui::UpdateData > & m_aVecUpdateData;
+    ::rtl::Reference<UpdateCommandEnv> m_updateCmdEnv;
+
+    //A folder which is created in the temp directory in which then the updates are downloaded
+    OUString m_sDownloadFolder;
+
+    bool m_stop;
+
+};
+
+class UpdateCommandEnv
+    : public ::cppu::WeakImplHelper< css::ucb::XCommandEnvironment,
+                                      css::task::XInteractionHandler,
+                                      css::ucb::XProgressHandler >
+{
+    friend class UpdateInstallDialog::Thread;
+
+    ::rtl::Reference<UpdateInstallDialog::Thread> m_installThread;
+    css::uno::Reference< css::uno::XComponentContext > m_xContext;
+
+public:
+    UpdateCommandEnv( css::uno::Reference< css::uno::XComponentContext > xCtx,
+        ::rtl::Reference<UpdateInstallDialog::Thread> thread);
+
+    // XCommandEnvironment
+    virtual css::uno::Reference<css::task::XInteractionHandler > SAL_CALL
+    getInteractionHandler() override;
+    virtual css::uno::Reference<css::ucb::XProgressHandler >
+    SAL_CALL getProgressHandler() override;
+
+    // XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+    // XProgressHandler
+    virtual void SAL_CALL push( css::uno::Any const & Status ) override;
+    virtual void SAL_CALL update( css::uno::Any const & Status ) override;
+    virtual void SAL_CALL pop() override;
+};
+
+
+UpdateInstallDialog::Thread::Thread(
+    css::uno::Reference< css::uno::XComponentContext> const & xCtx,
+    UpdateInstallDialog & dialog,
+    std::vector< dp_gui::UpdateData > & aVecUpdateData):
+    salhelper::Thread("dp_gui_updateinstalldialog"),
+    m_dialog(dialog),
+    m_xComponentContext(xCtx),
+    m_aVecUpdateData(aVecUpdateData),
+    m_updateCmdEnv(new UpdateCommandEnv(xCtx, this)),
+    m_stop(false)
+{}
+
+void UpdateInstallDialog::Thread::stop() {
+    css::uno::Reference< css::task::XAbortChannel > abort;
+    {
+        SolarMutexGuard g;
+        abort = m_abort;
+        m_stop = true;
+    }
+    if (abort.is()) {
+        abort->sendAbort();
+    }
+}
+
+UpdateInstallDialog::Thread::~Thread() {}
+
+void UpdateInstallDialog::Thread::execute()
+{
+    try {
+        downloadExtensions();
+        installExtensions();
+    }
+    catch (...)
+    {
+    }
+
+    //clean up the temp directories
+    try {
+        removeTempDownloads();
+    } catch( ... ) {
+    }
+
+    {
+        //make sure m_dialog is still alive
+        SolarMutexGuard g;
+        if (! m_stop)
+             m_dialog.updateDone();
+    }
+    //UpdateCommandEnv keeps a reference to Thread and prevents destruction. Therefore remove it.
+    m_updateCmdEnv->m_installThread.clear();
+}
+
+UpdateInstallDialog::UpdateInstallDialog(
+    weld::Window* pParent,
+    std::vector<dp_gui::UpdateData> & aVecUpdateData,
+    css::uno::Reference< css::uno::XComponentContext > const & xCtx)
+    : GenericDialogController(pParent, "desktop/ui/updateinstalldialog.ui",
+                              "UpdateInstallDialog")
+    , m_thread(new Thread(xCtx, *this, aVecUpdateData))
+    , m_bError(false)
+    , m_bNoEntry(true)
+    , m_sInstalling(DpResId(RID_DLG_UPDATE_INSTALL_INSTALLING))
+    , m_sFinished(DpResId(RID_DLG_UPDATE_INSTALL_FINISHED))
+    , m_sNoErrors(DpResId(RID_DLG_UPDATE_INSTALL_NO_ERRORS))
+    , m_sErrorDownload(DpResId(RID_DLG_UPDATE_INSTALL_ERROR_DOWNLOAD))
+    , m_sErrorInstallation(DpResId(RID_DLG_UPDATE_INSTALL_ERROR_INSTALLATION))
+    , m_sErrorLicenseDeclined(DpResId(RID_DLG_UPDATE_INSTALL_ERROR_LIC_DECLINED))
+    , m_sNoInstall(DpResId(RID_DLG_UPDATE_INSTALL_EXTENSION_NOINSTALL))
+    , m_sThisErrorOccurred(DpResId(RID_DLG_UPDATE_INSTALL_THIS_ERROR_OCCURRED))
+    , m_xFt_action(m_xBuilder->weld_label("DOWNLOADING"))
+    , m_xStatusbar(m_xBuilder->weld_progress_bar("STATUSBAR"))
+    , m_xFt_extension_name(m_xBuilder->weld_label("EXTENSION_NAME"))
+    , m_xMle_info(m_xBuilder->weld_text_view("INFO"))
+    , m_xHelp(m_xBuilder->weld_button("help"))
+    , m_xOk(m_xBuilder->weld_button("ok"))
+    , m_xCancel(m_xBuilder->weld_button("cancel"))
+{
+    m_xMle_info->set_size_request(m_xMle_info->get_approximate_digit_width() * 52,
+                                  m_xMle_info->get_height_rows(5));
+
+    m_xExtensionManager = css::deployment::ExtensionManager::get( xCtx );
+
+    m_xCancel->connect_clicked(LINK(this, UpdateInstallDialog, cancelHandler));
+    if ( ! dp_misc::office_is_running())
+        m_xHelp->set_sensitive(false);
+}
+
+UpdateInstallDialog::~UpdateInstallDialog()
+{
+}
+
+short UpdateInstallDialog::run()
+{
+    m_thread->launch();
+    short nRet = GenericDialogController::run();
+    m_thread->stop();
+    return nRet;
+}
+
+// make sure the solar mutex is locked before calling
+void UpdateInstallDialog::updateDone()
+{
+    if (!m_bError)
+        m_xMle_info->set_text(m_xMle_info->get_text() + m_sNoErrors);
+    m_xOk->set_sensitive(true);
+    m_xOk->grab_focus();
+    m_xCancel->set_sensitive(false);
+}
+
+// make sure the solar mutex is locked before calling
+//sets an error message in the text area
+void UpdateInstallDialog::setError(INSTALL_ERROR err, std::u16string_view sExtension,
+    std::u16string_view exceptionMessage)
+{
+    OUString sError;
+    m_bError = true;
+
+    switch (err)
+    {
+    case ERROR_DOWNLOAD:
+        sError = m_sErrorDownload;
+        break;
+    case ERROR_INSTALLATION:
+        sError = m_sErrorInstallation;
+        break;
+    case ERROR_LICENSE_DECLINED:
+        sError = m_sErrorLicenseDeclined;
+        break;
+
+    default:
+        OSL_ASSERT(false);
+    }
+
+    OUString sMsg(m_xMle_info->get_text());
+    sError = sError.replaceFirst("%NAME", sExtension);
+    //We want to have an empty line between the error messages. However,
+    //there shall be no empty line after the last entry.
+    if (m_bNoEntry)
+        m_bNoEntry = false;
+    else
+        sMsg += "\n";
+    sMsg += sError;
+    //Insert more information about the error
+    if (!exceptionMessage.empty())
+        sMsg += m_sThisErrorOccurred + exceptionMessage + "\n";
+
+    sMsg += m_sNoInstall + "\n";
+
+    m_xMle_info->set_text(sMsg);
+}
+
+void UpdateInstallDialog::setError(std::u16string_view exceptionMessage)
+{
+    m_bError = true;
+    m_xMle_info->set_text(m_xMle_info->get_text() + exceptionMessage + "\n");
+}
+
+IMPL_LINK_NOARG(UpdateInstallDialog, cancelHandler, weld::Button&, void)
+{
+    m_xDialog->response(RET_CANCEL);
+}
+
+void UpdateInstallDialog::Thread::downloadExtensions()
+{
+    try
+    {
+        //create the download directory in the temp folder
+        OUString sTempDir;
+        if (::osl::FileBase::getTempDirURL(sTempDir) != ::osl::FileBase::E_None)
+            throw css::uno::Exception("Could not get URL for the temp directory. No extensions will be installed.", nullptr);
+
+        //create a unique name for the directory
+        OUString tempEntry, destFolder;
+        if (::osl::File::createTempFile(&sTempDir, nullptr, &tempEntry ) != ::osl::File::E_None)
+            throw css::uno::Exception("Could not create a temporary file in " + sTempDir +
+             ". No extensions will be installed", nullptr );
+
+        tempEntry = tempEntry.copy( tempEntry.lastIndexOf( '/' ) + 1 );
+
+        destFolder = dp_misc::makeURL( sTempDir, tempEntry ) + "_";
+        m_sDownloadFolder = destFolder;
+        try
+        {
+            dp_misc::create_folder(nullptr, destFolder, m_updateCmdEnv );
+        } catch (const css::uno::Exception & e)
+        {
+            css::uno::Any anyEx = cppu::getCaughtException();
+            throw css::lang::WrappedTargetException( e.Message + " No extensions will be installed",
+                            nullptr, anyEx );
+        }
+
+
+        sal_uInt16 count = 0;
+        for (auto & updateData : m_aVecUpdateData)
+        {
+            if (!updateData.aUpdateInfo.is() || updateData.aUpdateSource.is())
+                continue;
+            //We assume that m_aVecUpdateData contains only information about extensions which
+            //can be downloaded directly.
+            OSL_ASSERT(updateData.sWebsiteURL.isEmpty());
+
+            //update the name of the extension which is to be downloaded
+            {
+                SolarMutexGuard g;
+                if (m_stop) {
+                    return;
+                }
+                m_dialog.m_xFt_extension_name->set_label(updateData.aInstalledPackage->getDisplayName());
+                sal_uInt16 prog = (sal::static_int_cast<sal_uInt16>(100) * ++count) /
+                    sal::static_int_cast<sal_uInt16>(m_aVecUpdateData.size());
+                m_dialog.m_xStatusbar->set_percentage(prog);
+            }
+            dp_misc::DescriptionInfoset info(m_xComponentContext, updateData.aUpdateInfo);
+            //remember occurring exceptions in case we need to print out error information
+            std::vector< std::pair<OUString, css::uno::Exception> > vecExceptions;
+            css::uno::Sequence<OUString> seqDownloadURLs = info.getUpdateDownloadUrls();
+            OSL_ENSURE(seqDownloadURLs.hasElements(), "No download URL provided!");
+            for (sal_Int32 j = 0; j < seqDownloadURLs.getLength(); j++)
+            {
+                try
+                {
+                    OSL_ENSURE(!seqDownloadURLs[j].isEmpty(), "Download URL is empty!");
+                    bool bCancelled = download(seqDownloadURLs[j], updateData);
+                    if (bCancelled || !updateData.sLocalURL.isEmpty())
+                        break;
+                }
+                catch ( css::uno::Exception & e )
+                {
+                    vecExceptions.emplace_back(seqDownloadURLs[j], e);
+                    //There can be several different errors, for example, the URL is wrong, webserver cannot be reached,
+                    //name cannot be resolved. The UCB helper API does not specify different special exceptions for these
+                    //cases. Therefore ignore and continue.
+                    continue;
+                }
+            }
+            //update the progress and display download error
+            {
+                SolarMutexGuard g;
+                if (m_stop) {
+                    return;
+                }
+                if (updateData.sLocalURL.isEmpty())
+                {
+                    //Construct a string of all messages contained in the exceptions plus the respective download URLs
+                    OUStringBuffer buf(256);
+                    size_t nPos = 0;
+                    for (auto const& elem : vecExceptions)
+                    {
+                        if (nPos)
+                            buf.append("\n");
+                        buf.append("Could not download ");
+                        buf.append(elem.first);
+                        buf.append(". ");
+                        buf.append(elem.second.Message);
+                        ++nPos;
+                    }
+                    m_dialog.setError(UpdateInstallDialog::ERROR_DOWNLOAD, updateData.aInstalledPackage->getDisplayName(),
+                        buf);
+                }
+            }
+
+        }
+    }
+    catch (const css::uno::Exception & e)
+    {
+        SolarMutexGuard g;
+        if (m_stop) {
+            return;
+        }
+        m_dialog.setError(e.Message);
+    }
+}
+
+void UpdateInstallDialog::Thread::installExtensions()
+{
+    //Update the fix text in the dialog to "Installing extensions..."
+    {
+        SolarMutexGuard g;
+        if (m_stop) {
+            return;
+        }
+        m_dialog.m_xFt_action->set_label(m_dialog.m_sInstalling);
+        m_dialog.m_xStatusbar->set_percentage(0);
+    }
+
+    sal_uInt16 count = 0;
+    for (auto const& updateData : m_aVecUpdateData)
+    {
+        //update the name of the extension which is to be installed
+        {
+            SolarMutexGuard g;
+            if (m_stop) {
+                return;
+            }
+            //we only show progress after an extension has been installed.
+            if (count > 0) {
+                m_dialog.m_xStatusbar->set_percentage(
+                (sal::static_int_cast<sal_uInt16>(100) * count) /
+                sal::static_int_cast<sal_uInt16>(m_aVecUpdateData.size()));
+            }
+            m_dialog.m_xFt_extension_name->set_label(updateData.aInstalledPackage->getDisplayName());
+        }
+        bool bError = false;
+        bool bLicenseDeclined = false;
+        css::uno::Reference<css::deployment::XPackage> xExtension;
+        css::uno::Exception exc;
+        try
+        {
+            css::uno::Reference< css::task::XAbortChannel > xAbortChannel(
+                updateData.aInstalledPackage->createAbortChannel() );
+            {
+                SolarMutexGuard g;
+                if (m_stop) {
+                    return;
+                }
+                m_abort = xAbortChannel;
+            }
+            if (!updateData.aUpdateSource.is() && !updateData.sLocalURL.isEmpty())
+            {
+                css::beans::NamedValue prop("EXTENSION_UPDATE", css::uno::Any(OUString("1")));
+                if (!updateData.bIsShared)
+                    xExtension = m_dialog.getExtensionManager()->addExtension(
+                        updateData.sLocalURL, css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
+                        "user", xAbortChannel, m_updateCmdEnv);
+                else
+                    xExtension = m_dialog.getExtensionManager()->addExtension(
+                        updateData.sLocalURL, css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
+                        "shared", xAbortChannel, m_updateCmdEnv);
+            }
+            else if (updateData.aUpdateSource.is())
+            {
+                OSL_ASSERT(updateData.aUpdateSource.is());
+                //I am not sure if we should obtain the install properties and pass them into
+                //add extension. Currently it contains only "SUPPRESS_LICENSE". So it could happen
+                //that a license is displayed when updating from the shared repository, although the
+                //shared extension was installed using "SUPPRESS_LICENSE".
+                css::beans::NamedValue prop("EXTENSION_UPDATE", css::uno::Any(OUString("1")));
+                if (!updateData.bIsShared)
+                    xExtension = m_dialog.getExtensionManager()->addExtension(
+                        updateData.aUpdateSource->getURL(), css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
+                        "user", xAbortChannel, m_updateCmdEnv);
+                else
+                    xExtension = m_dialog.getExtensionManager()->addExtension(
+                        updateData.aUpdateSource->getURL(), css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
+                        "shared", xAbortChannel, m_updateCmdEnv);
+            }
+        }
+        catch (css::deployment::DeploymentException & de)
+        {
+            if (de.Cause.has<css::deployment::LicenseException>())
+            {
+                bLicenseDeclined = true;
+            }
+            else
+            {
+                exc = de.Cause.get<css::uno::Exception>();
+                bError = true;
+            }
+        }
+        catch (css::uno::Exception& e)
+        {
+            exc = e;
+            bError = true;
+        }
+
+        if (bLicenseDeclined)
+        {
+            SolarMutexGuard g;
+            if (m_stop) {
+                return;
+            }
+            m_dialog.setError(UpdateInstallDialog::ERROR_LICENSE_DECLINED,
+                updateData.aInstalledPackage->getDisplayName(), std::u16string_view());
+        }
+        else if (!xExtension.is() || bError)
+        {
+            SolarMutexGuard g;
+            if (m_stop) {
+                return;
+            }
+            m_dialog.setError(UpdateInstallDialog::ERROR_INSTALLATION,
+                updateData.aInstalledPackage->getDisplayName(), exc.Message);
+        }
+        ++count;
+    }
+    {
+        SolarMutexGuard g;
+        if (m_stop) {
+            return;
+        }
+        m_dialog.m_xStatusbar->set_percentage(100);
+        m_dialog.m_xFt_extension_name->set_label(OUString());
+        m_dialog.m_xFt_action->set_label(m_dialog.m_sFinished);
+    }
+}
+
+void UpdateInstallDialog::Thread::removeTempDownloads()
+{
+    if (!m_sDownloadFolder.isEmpty())
+    {
+        dp_misc::erase_path(m_sDownloadFolder,
+            css::uno::Reference<css::ucb::XCommandEnvironment>(),false /* no throw: ignore errors */ );
+        //remove also the temp file which we have used to create the unique name
+        OUString tempFile = m_sDownloadFolder.copy(0, m_sDownloadFolder.getLength() - 1);
+        dp_misc::erase_path(tempFile, css::uno::Reference<css::ucb::XCommandEnvironment>(),false);
+        m_sDownloadFolder.clear();
+    }
+}
+
+bool UpdateInstallDialog::Thread::download(OUString const & sDownloadURL, UpdateData & aUpdateData)
+{
+    {
+        SolarMutexGuard g;
+        if (m_stop) {
+            return m_stop;
+        }
+    }
+
+    OSL_ASSERT(m_sDownloadFolder.getLength());
+    OUString destFolder, tempEntry;
+    if (::osl::File::createTempFile(
+        &m_sDownloadFolder,
+        nullptr, &tempEntry ) != ::osl::File::E_None)
+    {
+        //ToDo feedback in window that download of this component failed
+        throw css::uno::Exception("Could not create temporary file in folder " + destFolder + ".", nullptr);
+    }
+    tempEntry = tempEntry.copy( tempEntry.lastIndexOf( '/' ) + 1 );
+
+    destFolder = dp_misc::makeURL( m_sDownloadFolder, tempEntry ) + "_";
+
+    ::ucbhelper::Content destFolderContent;
+    dp_misc::create_folder( &destFolderContent, destFolder, m_updateCmdEnv );
+
+    ::ucbhelper::Content sourceContent;
+    (void)dp_misc::create_ucb_content(&sourceContent, sDownloadURL, m_updateCmdEnv);
+
+    const OUString sTitle( StrTitle::getTitle( sourceContent ) );
+
+    destFolderContent.transferContent(
+            sourceContent, ::ucbhelper::InsertOperation::Copy,
+            sTitle, css::ucb::NameClash::OVERWRITE );
+
+    {
+        //the user may have cancelled the dialog because downloading took too long
+        SolarMutexGuard g;
+        if (m_stop) {
+            return m_stop;
+        }
+        //all errors should be handled by the command environment.
+        aUpdateData.sLocalURL = destFolder + "/" + sTitle;
+    }
+
+    return m_stop;
+}
+
+UpdateCommandEnv::UpdateCommandEnv( css::uno::Reference< css::uno::XComponentContext > xCtx,
+    ::rtl::Reference<UpdateInstallDialog::Thread> thread)
+    : m_installThread(std::move(thread)),
+    m_xContext(std::move(xCtx))
+{
+}
+
+// XCommandEnvironment
+css::uno::Reference<css::task::XInteractionHandler> UpdateCommandEnv::getInteractionHandler()
+{
+    return this;
+}
+
+css::uno::Reference<css::ucb::XProgressHandler> UpdateCommandEnv::getProgressHandler()
+{
+    return this;
+}
+
+// XInteractionHandler
+void UpdateCommandEnv::handle(
+    css::uno::Reference< css::task::XInteractionRequest> const & xRequest )
+{
+    css::uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == css::uno::TypeClass_EXCEPTION );
+    dp_misc::TRACE("[dp_gui_cmdenv.cxx] incoming request:\n"
+        + ::comphelper::anyToString(request) + "\n\n");
+
+    css::deployment::VersionException verExc;
+    bool approve = false;
+
+    if (request >>= verExc)
+    {   //We must catch the version exception during the update,
+        //because otherwise the user would be confronted with the dialogs, asking
+        //them if they want to replace an already installed version of the same extension.
+        //During an update we assume that we always want to replace the old version with the
+        //new version.
+        approve = true;
+    }
+
+    if (!approve)
+    {
+        //forward to interaction handler for main dialog.
+        handleInteractionRequest( m_xContext, xRequest );
+    }
+    else
+    {
+        // select:
+        css::uno::Sequence< css::uno::Reference< css::task::XInteractionContinuation > > conts(
+            xRequest->getContinuations() );
+        css::uno::Reference< css::task::XInteractionContinuation > const * pConts =
+            conts.getConstArray();
+        sal_Int32 len = conts.getLength();
+        for ( sal_Int32 pos = 0; pos < len; ++pos )
+        {
+            if (approve) {
+                css::uno::Reference< css::task::XInteractionApprove > xInteractionApprove(
+                    pConts[ pos ], css::uno::UNO_QUERY );
+                if (xInteractionApprove.is()) {
+                    xInteractionApprove->select();
+                    // don't query again for ongoing continuations:
+                    approve = false;
+                }
+            }
+        }
+    }
+}
+
+// XProgressHandler
+void UpdateCommandEnv::push( css::uno::Any const & /*Status*/ )
+{
+}
+
+void UpdateCommandEnv::update( css::uno::Any const & /*Status */)
+{
+}
+
+void UpdateCommandEnv::pop()
+{
+}
+
+
+} //end namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/dp_gui_updateinstalldialog.hxx b/desktop/source/deployment/gui/dp_gui_updateinstalldialog.hxx
new file mode 100644
index 000000000..39b37ed4b
--- /dev/null
+++ b/desktop/source/deployment/gui/dp_gui_updateinstalldialog.hxx
@@ -0,0 +1,112 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+#include <vcl/weld.hxx>
+#include <rtl/ref.hxx>
+
+#include <string_view>
+#include <vector>
+
+/// @HTML
+namespace com::sun::star::deployment {
+    class XExtensionManager;
+}
+namespace com::sun::star::uno {
+    class XComponentContext;
+}
+
+namespace dp_gui {
+
+    struct UpdateData;
+    class UpdateCommandEnv;
+
+
+/**
+   The modal &ldquo;Download and Installation&rdquo; dialog.
+*/
+class UpdateInstallDialog : public weld::GenericDialogController
+{
+public:
+    /**
+       Create an instance.
+
+       @param parent
+       the parent window, may be null
+    */
+    UpdateInstallDialog(weld::Window* parent, std::vector<UpdateData> & aVecUpdateData,
+        css::uno::Reference< css::uno::XComponentContext > const & xCtx);
+
+    virtual ~UpdateInstallDialog() override;
+
+    virtual short run() override;
+
+private:
+    UpdateInstallDialog(UpdateInstallDialog const &) = delete;
+    UpdateInstallDialog& operator =(UpdateInstallDialog const &) = delete;
+
+    class Thread;
+    friend class Thread;
+    friend class UpdateCommandEnv;
+
+    DECL_LINK(cancelHandler, weld::Button&, void);
+
+    //signals in the dialog that we have finished.
+    void updateDone();
+    //Writes a particular error into the info listbox.
+    enum INSTALL_ERROR
+    {
+        ERROR_DOWNLOAD,
+        ERROR_INSTALLATION,
+        ERROR_LICENSE_DECLINED
+    };
+    void setError(INSTALL_ERROR err, std::u16string_view sExtension, std::u16string_view exceptionMessage);
+    void setError(std::u16string_view exceptionMessage);
+    const css::uno::Reference< css::deployment::XExtensionManager >& getExtensionManager() const
+            { return m_xExtensionManager; }
+
+    rtl::Reference< Thread > m_thread;
+    css::uno::Reference< css::deployment::XExtensionManager > m_xExtensionManager;
+    //Signals that an error occurred during download and installation
+    bool m_bError;
+    bool m_bNoEntry;
+
+    OUString m_sInstalling;
+    OUString m_sFinished;
+    OUString m_sNoErrors;
+    OUString m_sErrorDownload;
+    OUString m_sErrorInstallation;
+    OUString m_sErrorLicenseDeclined;
+    OUString m_sNoInstall;
+    OUString m_sThisErrorOccurred;
+
+    std::unique_ptr<weld::Label> m_xFt_action;
+    std::unique_ptr<weld::ProgressBar>  m_xStatusbar;
+    std::unique_ptr<weld::Label> m_xFt_extension_name;
+    std::unique_ptr<weld::TextView> m_xMle_info;
+    std::unique_ptr<weld::Button> m_xHelp;
+    std::unique_ptr<weld::Button> m_xOk;
+    std::unique_ptr<weld::Button> m_xCancel;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/license_dialog.cxx b/desktop/source/deployment/gui/license_dialog.cxx
new file mode 100644
index 000000000..23f184a33
--- /dev/null
+++ b/desktop/source/deployment/gui/license_dialog.cxx
@@ -0,0 +1,244 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <comphelper/unwrapargs.hxx>
+#include <vcl/event.hxx>
+#include <vcl/idle.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/threadex.hxx>
+#include <vcl/weld.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include "license_dialog.hxx"
+
+#include <functional>
+#include <string_view>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_gui {
+
+namespace {
+
+struct LicenseDialogImpl : public weld::GenericDialogController
+{
+    bool m_bLicenseRead;
+    Idle m_aResized;
+    AutoTimer m_aRepeat;
+
+    std::unique_ptr<weld::Label> m_xFtHead;
+    std::unique_ptr<weld::Widget> m_xArrow1;
+    std::unique_ptr<weld::Widget> m_xArrow2;
+    std::unique_ptr<weld::TextView> m_xLicense;
+    std::unique_ptr<weld::Button> m_xDown;
+    std::unique_ptr<weld::Button> m_xAcceptButton;
+    std::unique_ptr<weld::Button> m_xDeclineButton;
+
+    void PageDown();
+    DECL_LINK(ScrollTimerHdl, Timer*, void);
+    DECL_LINK(ScrolledHdl, weld::TextView&, void);
+    DECL_LINK(ResizedHdl, Timer*, void);
+    DECL_LINK(CancelHdl, weld::Button&, void);
+    DECL_LINK(AcceptHdl, weld::Button&, void);
+    DECL_LINK(KeyInputHdl, const KeyEvent&, bool);
+    DECL_STATIC_LINK(LicenseDialogImpl, KeyReleaseHdl, const KeyEvent&, bool);
+    DECL_LINK(MousePressHdl, const MouseEvent&, bool);
+    DECL_LINK(MouseReleaseHdl, const MouseEvent&, bool);
+    DECL_LINK(SizeAllocHdl, const Size&, void);
+
+    LicenseDialogImpl(weld::Window * pParent,
+                      std::u16string_view sExtensionName,
+                      const OUString & sLicenseText);
+
+    bool IsEndReached() const;
+};
+
+}
+
+LicenseDialogImpl::LicenseDialogImpl(
+    weld::Window * pParent,
+    std::u16string_view sExtensionName,
+    const OUString & sLicenseText)
+    : GenericDialogController(pParent, "desktop/ui/licensedialog.ui", "LicenseDialog")
+    , m_bLicenseRead(false)
+    , m_aResized("desktop LicenseDialogImpl m_aResized")
+    , m_aRepeat("LicenseDialogImpl m_aRepeat")
+    , m_xFtHead(m_xBuilder->weld_label("head"))
+    , m_xArrow1(m_xBuilder->weld_widget("arrow1"))
+    , m_xArrow2(m_xBuilder->weld_widget("arrow2"))
+    , m_xLicense(m_xBuilder->weld_text_view("textview"))
+    , m_xDown(m_xBuilder->weld_button("down"))
+    , m_xAcceptButton(m_xBuilder->weld_button("ok"))
+    , m_xDeclineButton(m_xBuilder->weld_button("cancel"))
+{
+    m_xArrow1->show();
+    m_xArrow2->hide();
+
+    m_xLicense->connect_size_allocate(LINK(this, LicenseDialogImpl, SizeAllocHdl));
+    m_xLicense->set_size_request(m_xLicense->get_approximate_digit_width() * 72,
+                                     m_xLicense->get_height_rows(21));
+
+    m_xLicense->set_text(sLicenseText);
+    m_xFtHead->set_label(m_xFtHead->get_label() + "\n" + sExtensionName);
+
+    m_xAcceptButton->connect_clicked( LINK(this, LicenseDialogImpl, AcceptHdl) );
+    m_xDeclineButton->connect_clicked( LINK(this, LicenseDialogImpl, CancelHdl) );
+
+    m_xLicense->connect_vadjustment_changed(LINK(this, LicenseDialogImpl, ScrolledHdl));
+    m_xDown->connect_mouse_press(LINK(this, LicenseDialogImpl, MousePressHdl));
+    m_xDown->connect_mouse_release(LINK(this, LicenseDialogImpl, MouseReleaseHdl));
+    m_xDown->connect_key_press(LINK(this, LicenseDialogImpl, KeyInputHdl));
+    m_xDown->connect_key_release(LINK(this, LicenseDialogImpl, KeyReleaseHdl));
+
+    m_aRepeat.SetTimeout(Application::GetSettings().GetMouseSettings().GetButtonRepeat());
+    m_aRepeat.SetInvokeHandler(LINK(this, LicenseDialogImpl, ScrollTimerHdl));
+
+    m_aResized.SetPriority(TaskPriority::LOWEST);
+    m_aResized.SetInvokeHandler(LINK(this, LicenseDialogImpl, ResizedHdl));
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, SizeAllocHdl, const Size&, void)
+{
+    m_aResized.Start();
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, AcceptHdl, weld::Button&, void)
+{
+    m_xDialog->response(RET_OK);
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, CancelHdl, weld::Button&, void)
+{
+    m_xDialog->response(RET_CANCEL);
+}
+
+bool LicenseDialogImpl::IsEndReached() const
+{
+    return m_xLicense->vadjustment_get_value() + m_xLicense->vadjustment_get_page_size() >= m_xLicense->vadjustment_get_upper();
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, ScrolledHdl, weld::TextView&, void)
+{
+    if (IsEndReached())
+    {
+        m_xDown->set_sensitive(false);
+        m_aRepeat.Stop();
+
+        if (!m_bLicenseRead)
+        {
+            m_xAcceptButton->set_sensitive(true);
+            m_xAcceptButton->grab_focus();
+            m_xArrow1->hide();
+            m_xArrow2->show();
+            m_bLicenseRead = true;
+        }
+    }
+    else
+        m_xDown->set_sensitive(true);
+}
+
+void LicenseDialogImpl::PageDown()
+{
+    m_xLicense->vadjustment_set_value(m_xLicense->vadjustment_get_value() +
+                                      m_xLicense->vadjustment_get_page_size());
+    ScrolledHdl(*m_xLicense);
+}
+
+IMPL_LINK(LicenseDialogImpl, KeyInputHdl, const KeyEvent&, rKEvt, bool)
+{
+    vcl::KeyCode aKeyCode = rKEvt.GetKeyCode();
+    if (aKeyCode.GetCode() == KEY_RETURN || aKeyCode.GetCode() == KEY_SPACE)
+        PageDown();
+    return false;
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, ResizedHdl, Timer*, void)
+{
+    ScrolledHdl(*m_xLicense);
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, ScrollTimerHdl, Timer*, void)
+{
+    PageDown();
+}
+
+IMPL_STATIC_LINK_NOARG(LicenseDialogImpl, KeyReleaseHdl, const KeyEvent&, bool)
+{
+    return false;
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, MousePressHdl, const MouseEvent&, bool)
+{
+    PageDown();
+    m_aRepeat.Start();
+    return false;
+}
+
+IMPL_LINK_NOARG(LicenseDialogImpl, MouseReleaseHdl, const MouseEvent&, bool)
+{
+    m_aRepeat.Stop();
+    return false;
+}
+
+LicenseDialog::LicenseDialog( Sequence<Any> const& args,
+                          Reference<XComponentContext> const& )
+{
+    comphelper::unwrapArgs( args, m_parent, m_sExtensionName, m_sLicenseText );
+}
+
+// XServiceInfo
+OUString LicenseDialog::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.ui.LicenseDialog";
+}
+
+sal_Bool LicenseDialog::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > LicenseDialog::getSupportedServiceNames()
+{
+    return { "com.sun.star.deployment.ui.LicenseDialog" };
+}
+
+
+// XExecutableDialog
+
+void LicenseDialog::setTitle( OUString const & )
+{
+}
+
+sal_Int16 LicenseDialog::execute()
+{
+    return vcl::solarthread::syncExecute(
+        std::bind(&LicenseDialog::solar_execute, this));
+}
+
+sal_Int16 LicenseDialog::solar_execute()
+{
+    LicenseDialogImpl dlg(Application::GetFrameWeld(m_parent), m_sExtensionName, m_sLicenseText);
+    return dlg.run();
+}
+
+} // namespace dp_gui
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/gui/license_dialog.hxx b/desktop/source/deployment/gui/license_dialog.hxx
new file mode 100644
index 000000000..3c628a880
--- /dev/null
+++ b/desktop/source/deployment/gui/license_dialog.hxx
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#pragma once
+
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/awt/XWindow.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/ui/dialogs/XExecutableDialog.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+namespace dp_gui
+{
+class LicenseDialog
+    : public ::cppu::WeakImplHelper<css::ui::dialogs::XExecutableDialog, css::lang::XServiceInfo>
+{
+    css::uno::Reference<css::awt::XWindow> /* const */ m_parent;
+    OUString m_sExtensionName;
+    OUString /* const */ m_sLicenseText;
+
+    sal_Int16 solar_execute();
+
+public:
+    LicenseDialog(css::uno::Sequence<css::uno::Any> const& args,
+                  css::uno::Reference<css::uno::XComponentContext> const& xComponentContext);
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
+    virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+    // XExecutableDialog
+    virtual void SAL_CALL setTitle(OUString const& title) override;
+    virtual sal_Int16 SAL_CALL execute() override;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_dependencies.hxx b/desktop/source/deployment/inc/dp_dependencies.hxx
new file mode 100644
index 000000000..1c9872c78
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_dependencies.hxx
@@ -0,0 +1,72 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include "dp_misc_api.hxx"
+
+/// @HTML
+
+namespace com::sun::star::xml::dom {
+    class XElement;
+}
+namespace dp_misc { class DescriptionInfoset; }
+
+namespace dp_misc {
+
+/**
+   Dependency handling.
+*/
+namespace Dependencies {
+    /**
+       Check for unsatisfied dependencies.
+
+       @param infoset
+       the infoset containing the dependencies to check
+
+       @return
+       a list of the unsatisfied dependencies from <code>infoset</code> (in no
+       specific order)
+    */
+    DESKTOP_DEPLOYMENTMISC_DLLPUBLIC css::uno::Sequence<
+        css::uno::Reference< css::xml::dom::XElement > >
+    check(dp_misc::DescriptionInfoset const & infoset);
+
+    /**
+       Obtain the (human-readable) error message of a failed dependency.
+
+       @param dependency
+       a dependency represented as a non-null XML element
+
+       @return
+       the name of the dependency; will never be empty, as a localized
+       &ldquo;unknown&rdquo; is substituted for an empty/missing name
+    */
+    DESKTOP_DEPLOYMENTMISC_DLLPUBLIC OUString getErrorText(
+        css::uno::Reference< css::xml::dom::XElement >
+            const & dependency);
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_descriptioninfoset.hxx b/desktop/source/deployment/inc/dp_descriptioninfoset.hxx
new file mode 100644
index 000000000..08d533a79
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_descriptioninfoset.hxx
@@ -0,0 +1,287 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <optional>
+#include <string_view>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <sal/types.h>
+#include "dp_misc_api.hxx"
+
+/// @HTML
+
+namespace com::sun::star {
+    namespace uno { class XComponentContext; }
+    namespace xml {
+        namespace dom {
+            class XNode;
+            class XNodeList;
+        }
+        namespace xpath { class XXPathAPI; }
+    }
+}
+
+namespace dp_misc {
+
+struct DESKTOP_DEPLOYMENTMISC_DLLPUBLIC SimpleLicenseAttributes
+{
+    OUString acceptBy;
+    //Attribute suppress-on-update. Default is false.
+    bool suppressOnUpdate;
+    //Attribute suppress-if-required. Default is false.
+    bool suppressIfRequired;
+};
+
+
+/**
+   Access to the content of an XML <code>description</code> element.
+
+   <p>This works for <code>description</code> elements in both the
+   <code>description.xml</code> file and online update information formats.</p>
+*/
+class DESKTOP_DEPLOYMENTMISC_DLLPUBLIC DescriptionInfoset {
+public:
+    /**
+       Create an instance.
+
+       @param context
+       a non-null component context
+
+       @param element
+       a <code>description</code> element; may be null (equivalent to an element
+       with no content)
+    */
+    DescriptionInfoset(
+        css::uno::Reference< css::uno::XComponentContext > const & context,
+        css::uno::Reference< css::xml::dom::XNode > const & element);
+
+    ~DescriptionInfoset();
+
+    /**
+       Return the identifier.
+
+       @return
+       the identifier, or an empty <code>optional</code> if none is specified
+    */
+    ::std::optional< OUString > getIdentifier() const;
+
+    /**
+       Return the textual version representation.
+
+       @return
+       textual version representation
+    */
+    OUString getVersion() const;
+
+    /**
+        Returns a list of supported platforms.
+
+        If the extension does not specify a platform by leaving out the platform element
+        then we assume that the extension supports all platforms. In this case the returned
+        sequence will have one element, which is &quot;all&quot;.
+        If the platform element is present but does not specify a platform then an empty
+        sequence is returned. Examples for invalid platform elements:
+        <pre>
+            <platform />, <platform value="" />, <platform value=",">
+        </pre>
+
+        The value attribute can contain various platform tokens. They must be separated by
+        commas.Each token will be stripped from leading and trailing white space (trim()).
+    */
+    css::uno::Sequence< OUString > getSupportedPlatforms() const;
+
+    /**
+        Returns the localized publisher name and the corresponding URL.
+
+        In case there is no publisher element then a pair of two empty strings is returned.
+    */
+    std::pair< OUString, OUString > getLocalizedPublisherNameAndURL() const;
+
+    /**
+        Returns the URL for the release notes corresponding to the office's locale.
+
+        In case there is no release-notes element then an empty string is returned.
+    */
+    OUString getLocalizedReleaseNotesURL() const;
+
+    /** returns the relative path to the license file.
+
+        In case there is no simple-license element then an empty string is returned.
+    */
+    OUString getLocalizedLicenseURL() const;
+
+    /** returns the attributes of the simple-license element
+
+        As long as there is a simple-license element, the function will return
+        the structure. If it does not exist, then the optional object is uninitialized.
+    */
+    ::std::optional<SimpleLicenseAttributes> getSimpleLicenseAttributes() const;
+
+    /** returns the localized display name of the extensions.
+
+        In case there is no localized display-name then an empty string is returned.
+    */
+    OUString getLocalizedDisplayName() const;
+
+    /**
+        returns the download website URL from the update information.
+
+        There can be multiple URLs where each is assigned to a particular locale.
+        The function returns the URL which locale matches best the one used in the office.
+
+        The return value is an optional because it may be necessary to find out if there
+        was a value provided or not. This is necessary to flag the extension in the update dialog
+        properly as "browser based update". The return value will only then not be initialized
+        if there is no <code>&lt;update-website&gt;</code>. If the element exists, then it must
+        have at least one child element containing a URL.
+
+        The <code>&lt;update-website&gt;</code> and <code>&lt;update-download&gt;</code>
+        elements are mutually exclusive.
+
+        @return
+        the download website URL, or an empty <code>optional</code> if none is
+        specified
+    */
+    ::std::optional< OUString > getLocalizedUpdateWebsiteURL() const;
+
+    /** returns the relative URL to the description.
+
+       The URL is relative to the root directory of the extensions.
+    */
+    OUString getLocalizedDescriptionURL() const;
+    /**
+       Return the dependencies.
+
+       @return
+       dependencies; will never be null
+    */
+    css::uno::Reference< css::xml::dom::XNodeList >
+    getDependencies() const;
+
+    /**
+       Return the update information URLs.
+
+       @return
+       update information URLs
+    */
+    css::uno::Sequence< OUString > getUpdateInformationUrls() const;
+
+     /**
+        Return the download URLs from the update information.
+
+        Because the <code>&lt;update-download&gt;</code> and the <code>&lt;update-website&gt;</code>
+        elements are mutually exclusive one may need to determine exactly if the element
+        was provided.
+
+        @return
+        download URLs
+     */
+    css::uno::Sequence< OUString > getUpdateDownloadUrls() const;
+
+    /**
+        Returns the URL for the icon image.
+    */
+    OUString getIconURL( bool bHighContrast ) const;
+
+    bool hasDescription() const;
+
+private:
+    SAL_DLLPRIVATE ::std::optional< OUString > getOptionalValue(
+        OUString const & expression) const;
+
+    SAL_DLLPRIVATE css::uno::Sequence< OUString > getUrls(
+        OUString const & expression) const;
+
+    /** Retrieves a child element which as lang attribute which matches the office locale.
+
+        Only top-level children are taken into account. It is also assumed that they are all
+        of the same element type and have a lang attribute. The matching algorithm is according
+        to RFC 3066, with the exception that only one variant is allowed.
+        @param parent
+        the expression used to obtain the parent of the localized children. It can be null.
+        Then a null reference is returned.
+    */
+    SAL_DLLPRIVATE css::uno::Reference< css::xml::dom::XNode >
+        getLocalizedChild( OUString const & sParent) const;
+    SAL_DLLPRIVATE  css::uno::Reference< css::xml::dom::XNode>
+        matchLanguageTag(
+        css::uno::Reference< css::xml::dom::XNode > const & xParent,
+        std::u16string_view rTag) const;
+
+    /** If there is no child element with a locale matching the office locale, then we use
+        the first child. In the case of the simple-license we also use the former default locale, which
+        was determined by the default-license-id (/description/registration/simple-license/@default-license-id)
+        and the license-id attributes (/description/registration/simple-license/license-text/@license-id).
+        However, since OOo 2.4 we use also the first child as default for the license
+        unless the two attributes are present.
+    */
+    SAL_DLLPRIVATE  css::uno::Reference< css::xml::dom::XNode>
+        getChildWithDefaultLocale(
+        css::uno::Reference< css::xml::dom::XNode > const & xParent) const;
+    /**
+        @param out_bParentExists
+            indicates if the element node specified in sXPathParent exists.
+    */
+    SAL_DLLPRIVATE OUString getLocalizedHREFAttrFromChild(
+        OUString const & sXPathParent, bool * out_bParentExists) const;
+
+    /** Gets the node value for a given expression. The expression is used in
+        m_xpath-selectSingleNode. The value of the returned node is return value
+        of this function.
+    */
+    SAL_DLLPRIVATE OUString
+        getNodeValueFromExpression(OUString const & expression) const;
+
+    /** Check the extensions denylist if additional extension meta data (e.g. dependencies)
+        are defined for this extension and have to be taken into account.
+    */
+    SAL_DLLPRIVATE void
+        checkDenylist() const;
+
+    /** Helper method to compare the versions with the current version
+     */
+    SAL_DLLPRIVATE static bool
+        checkDenylistVersion(std::u16string_view currentversion,
+                              css::uno::Sequence< OUString > const & versions);
+
+    css::uno::Reference< css::uno::XComponentContext > m_context;
+    css::uno::Reference< css::xml::dom::XNode >        m_element;
+    css::uno::Reference< css::xml::xpath::XXPathAPI >  m_xpath;
+};
+
+inline  bool DescriptionInfoset::hasDescription() const
+{
+    return m_element.is();
+}
+
+/** creates a DescriptionInfoset object.
+
+    The argument sExtensionFolderURL is a file URL to extension folder containing
+    the description.xml.
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+DescriptionInfoset getDescriptionInfoset(std::u16string_view sExtensionFolderURL);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_identifier.hxx b/desktop/source/deployment/inc/dp_identifier.hxx
new file mode 100644
index 000000000..bd11170b6
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_identifier.hxx
@@ -0,0 +1,84 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <optional>
+#include <string_view>
+
+#include <com/sun/star/uno/Reference.hxx>
+
+#include "dp_misc_api.hxx"
+
+namespace com::sun::star::deployment {
+    class XPackage;
+}
+
+namespace dp_misc {
+
+/**
+   Generates an identifier from an optional identifier.
+
+   @param optional
+   an optional identifier
+
+   @param fileName
+   a file name
+
+   @return
+   the given optional identifier if present, otherwise a legacy identifier based
+   on the given file name
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC OUString generateIdentifier(
+    ::std::optional< OUString > const & optional,
+    std::u16string_view fileName);
+
+/**
+   Gets the identifier of a package.
+
+   @param package
+   a non-null package
+
+   @return
+   the explicit identifier of the given package if present, otherwise the
+   implicit legacy identifier of the given package
+
+   @throws css::uno::RuntimeException
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC OUString getIdentifier(
+    css::uno::Reference< css::deployment::XPackage >
+        const & package);
+
+/**
+   Generates a legacy identifier based on a file name.
+
+   @param fileName
+   a file name
+
+   @return
+   a legacy identifier based on the given file name
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC OUString generateLegacyIdentifier(
+    std::u16string_view fileName);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_interact.h b/desktop/source/deployment/inc/dp_interact.h
new file mode 100644
index 000000000..6a041d99f
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_interact.h
@@ -0,0 +1,140 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <config_options.h>
+#include <rtl/ref.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/task/XAbortChannel.hpp>
+#include <utility>
+#include "dp_misc_api.hxx"
+
+namespace dp_misc
+{
+
+inline void progressUpdate(
+    OUString const & status,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    if (xCmdEnv.is()) {
+        css::uno::Reference<css::ucb::XProgressHandler> xProgressHandler(
+            xCmdEnv->getProgressHandler() );
+        if (xProgressHandler.is()) {
+            xProgressHandler->update( css::uno::Any(status) );
+        }
+    }
+}
+
+
+class ProgressLevel
+{
+    css::uno::Reference<css::ucb::XProgressHandler> m_xProgressHandler;
+
+public:
+    inline ~ProgressLevel();
+    inline ProgressLevel(
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+        OUString const & status );
+
+    inline void update( OUString const & status ) const;
+    inline void update( css::uno::Any const & status ) const;
+};
+
+
+inline ProgressLevel::ProgressLevel(
+    css::uno::Reference< css::ucb::XCommandEnvironment > const & xCmdEnv,
+    OUString const & status )
+{
+    if (xCmdEnv.is())
+        m_xProgressHandler = xCmdEnv->getProgressHandler();
+    if (m_xProgressHandler.is())
+        m_xProgressHandler->push( css::uno::Any(status) );
+}
+
+
+inline ProgressLevel::~ProgressLevel()
+{
+    if (m_xProgressHandler.is())
+        m_xProgressHandler->pop();
+}
+
+
+inline void ProgressLevel::update( OUString const & status ) const
+{
+    if (m_xProgressHandler.is())
+        m_xProgressHandler->update( css::uno::Any(status) );
+}
+
+
+inline void ProgressLevel::update( css::uno::Any const & status ) const
+{
+    if (m_xProgressHandler.is())
+        m_xProgressHandler->update( status );
+}
+
+
+
+/** @return true if ia handler is present and any selection has been chosen
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC bool interactContinuation(
+    css::uno::Any const & request,
+    css::uno::Type const & continuation,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+    bool * pcont, bool * pabort );
+
+
+
+
+class UNLESS_MERGELIBS(DESKTOP_DEPLOYMENTMISC_DLLPUBLIC) AbortChannel :
+    public ::cppu::WeakImplHelper<css::task::XAbortChannel>
+{
+    bool m_aborted;
+    css::uno::Reference<css::task::XAbortChannel> m_xNext;
+
+public:
+    AbortChannel() : m_aborted( false ) {}
+    static AbortChannel * get(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel )
+        { return static_cast<AbortChannel *>(xAbortChannel.get()); }
+
+    bool isAborted() const { return m_aborted; }
+
+    // XAbortChannel
+    virtual void SAL_CALL sendAbort() override;
+
+    class SAL_DLLPRIVATE Chain
+    {
+        const ::rtl::Reference<AbortChannel> m_abortChannel;
+    public:
+        Chain(
+            ::rtl::Reference<AbortChannel> abortChannel,
+            css::uno::Reference<css::task::XAbortChannel> const & xNext )
+            : m_abortChannel(std::move( abortChannel ))
+            { if (m_abortChannel.is()) m_abortChannel->m_xNext = xNext; }
+        ~Chain()
+            { if (m_abortChannel.is()) m_abortChannel->m_xNext.clear(); }
+    };
+    friend class Chain;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_misc_api.hxx b/desktop/source/deployment/inc/dp_misc_api.hxx
new file mode 100644
index 000000000..ecb07dada
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_misc_api.hxx
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+#include <sal/types.h>
+
+#if defined DESKTOP_DEPLOYMENTMISC_DLLIMPLEMENTATION
+#define DESKTOP_DEPLOYMENTMISC_DLLPUBLIC SAL_DLLPUBLIC_EXPORT
+#else
+#define DESKTOP_DEPLOYMENTMISC_DLLPUBLIC SAL_DLLPUBLIC_IMPORT
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_package.hxx b/desktop/source/deployment/inc/dp_package.hxx
new file mode 100644
index 000000000..f287990f2
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_package.hxx
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <rtl/ustring.hxx>
+
+namespace com::sun::star {
+    namespace deployment { class XPackageRegistry; }
+    namespace uno { class XComponentContext; }
+}
+
+namespace dp_registry::backend::bundle {
+
+css::uno::Reference<css::deployment::XPackageRegistry> create(
+    css::uno::Reference<css::deployment::XPackageRegistry> const &
+        xRootRegistry,
+    OUString const & context, OUString const & cachePath,
+    css::uno::Reference<css::uno::XComponentContext> const & xComponentContext);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_persmap.h b/desktop/source/deployment/inc/dp_persmap.h
new file mode 100644
index 000000000..c36979807
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_persmap.h
@@ -0,0 +1,60 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <osl/file.hxx>
+#include <unordered_map>
+
+namespace dp_misc
+{
+typedef std::unordered_map<OString, OString> t_string2string_map;
+
+// Class to read obsolete registered extensions
+// should be removed for LibreOffice 4.0
+class PersistentMap final
+{
+    ::osl::File m_MapFile;
+    t_string2string_map m_entries;
+    bool m_bIsOpen;
+    bool m_bToBeCreated;
+    bool m_bIsDirty;
+
+public:
+    ~PersistentMap();
+    PersistentMap(OUString const& url);
+    /** in mem db */
+    PersistentMap();
+
+    bool has(OString const& key) const;
+    bool get(OString* value, OString const& key) const;
+    const t_string2string_map& getEntries() const { return m_entries; }
+    void put(OString const& key, OString const& value);
+    bool erase(OString const& key);
+
+private:
+    void open();
+    void readAll();
+    void add(OString const& key, OString const& value);
+    void flush();
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_platform.hxx b/desktop/source/deployment/inc/dp_platform.hxx
new file mode 100644
index 000000000..5e454700d
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_platform.hxx
@@ -0,0 +1,41 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include "dp_misc_api.hxx"
+
+#include <com/sun/star/uno/Sequence.hxx>
+#include <rtl/ustring.hxx>
+
+namespace dp_misc
+{
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC OUString const& getPlatformString();
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+bool platform_fits(std::u16string_view platform_string);
+
+/** determines if the current platform corresponds to one of the platform strings.
+
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+bool hasValidPlatform(css::uno::Sequence<OUString> const& platformStrings);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_registry.hxx b/desktop/source/deployment/inc/dp_registry.hxx
new file mode 100644
index 000000000..76742587e
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_registry.hxx
@@ -0,0 +1,40 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <rtl/ustring.hxx>
+
+namespace com::sun::star {
+    namespace deployment { class XPackageRegistry; }
+    namespace uno { class XComponentContext; }
+}
+
+namespace dp_registry {
+
+css::uno::Reference<css::deployment::XPackageRegistry> create(
+    OUString const & context, OUString const & cachePath,
+    css::uno::Reference<css::uno::XComponentContext> const & xComponentContext);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_resource.h b/desktop/source/deployment/inc/dp_resource.h
new file mode 100644
index 000000000..471960e8d
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_resource.h
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <i18nlangtag/languagetag.hxx>
+#include "dp_misc_api.hxx"
+
+namespace dp_misc
+{
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC const LanguageTag& getOfficeLanguageTag();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_ucb.h b/desktop/source/deployment/inc/dp_ucb.h
new file mode 100644
index 000000000..291b28b9b
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_ucb.h
@@ -0,0 +1,94 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vector>
+#include <com/sun/star/sdbc/XResultSet.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include "dp_misc_api.hxx"
+#include <ucbhelper/content.hxx>
+
+namespace ucbhelper
+{
+class Content;
+}
+
+namespace dp_misc {
+
+struct DESKTOP_DEPLOYMENTMISC_DLLPUBLIC StrTitle
+{
+    static css::uno::Sequence< OUString > getTitleSequence()
+    {
+        css::uno::Sequence<OUString> aSeq { "Title" };
+        return aSeq;
+    }
+    static OUString getTitle( ::ucbhelper::Content &rContent )
+    {
+        return rContent.getPropertyValue("Title").get<OUString>();
+    }
+    // just return titles - the ucbhelper should have a simpler API for this [!]
+    static css::uno::Reference< css::sdbc::XResultSet >
+        createCursor( ::ucbhelper::Content &rContent,
+                      ucbhelper::ResultSetInclude eInclude )
+    {
+        return rContent.createCursor( StrTitle::getTitleSequence(), eInclude );
+    }
+};
+
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC bool create_ucb_content(
+    ::ucbhelper::Content * ucb_content,
+    OUString const & url,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+    bool throw_exc = true );
+
+
+/** @return true if previously non-existing folder has been created
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC bool create_folder(
+    ::ucbhelper::Content * ucb_content,
+    OUString const & url,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+    bool throw_exc = true );
+
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC bool erase_path(
+    OUString const & url,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+    bool throw_exc = true );
+
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+std::vector<sal_Int8> readFile( ::ucbhelper::Content & ucb_content );
+
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+bool readLine( OUString * res, OUString const & startingWith,
+               ::ucbhelper::Content & ucb_content, rtl_TextEncoding textenc );
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+bool readProperties( std::vector< std::pair< OUString, OUString> > & out_result,
+                ::ucbhelper::Content & ucb_content);
+
+
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_update.hxx b/desktop/source/deployment/inc/dp_update.hxx
new file mode 100644
index 000000000..8dce9b583
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_update.hxx
@@ -0,0 +1,136 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/deployment/XExtensionManager.hpp>
+#include <com/sun/star/deployment/XUpdateInformationProvider.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/xml/dom/XNode.hpp>
+
+#include "dp_misc_api.hxx"
+
+#include <map>
+#include <vector>
+
+namespace dp_misc {
+
+/** returns the default update URL (for the update information) which
+    is used when an extension does not provide its own URL.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+OUString getExtensionDefaultUpdateURL();
+
+enum UPDATE_SOURCE
+{
+    UPDATE_SOURCE_NONE,
+    UPDATE_SOURCE_SHARED,
+    UPDATE_SOURCE_BUNDLED,
+    UPDATE_SOURCE_ONLINE
+};
+
+/* determine if an update is available which is installed in the
+   user repository.
+
+   If the return value is UPDATE_SOURCE_NONE, then no update is
+   available, otherwise the return value determine from which the
+   repository the update is used.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+UPDATE_SOURCE isUpdateUserExtension(
+    bool bReadOnlyShared,
+    OUString const & userVersion,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion);
+
+/* determine if an update is available which is installed in the
+   shared repository.
+
+   If the return value is UPDATE_SOURCE_NONE, then no update is
+   available, otherwise the return value determine from which the
+   repository the update is used.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+UPDATE_SOURCE isUpdateSharedExtension(
+    bool bReadOnlyShared,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion);
+
+/* determines the extension with the highest identifier and returns it
+
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+css::uno::Reference< css::deployment::XPackage>
+getExtensionWithHighestVersion(
+    css::uno::Sequence<
+    css::uno::Reference<
+    css::deployment::XPackage> > const & seqExtensionsWithSameId);
+
+
+struct UpdateInfo
+{
+    UpdateInfo( css::uno::Reference< css::deployment::XPackage> const & ext);
+
+    css::uno::Reference<  css::deployment::XPackage> extension;
+    //version of the update
+    OUString version;
+    css::uno::Reference< css::xml::dom::XNode > info;
+};
+
+typedef std::map< OUString, UpdateInfo > UpdateInfoMap;
+
+/*
+  @param extensionList
+  List of extension for which online update information is to be obtained. If NULL, then
+  for update information is obtained for all installed extension. There may be only one extension
+  with a particular identifier contained in the list. If one extension is installed
+  in several repositories, then the one with the highest version must be used, because it contains
+  the more recent URLs for getting the update information (if at all).
+  @param out_errors
+  the first member of the pair is the extension  and the second the exception that was produced
+  when processing the extension.
+
+  @return
+  A map of UpdateInfo instances. If the parameter extensionList was given, then the map contains
+  at only information for those extensions.
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+UpdateInfoMap getOnlineUpdateInfos(
+    css::uno::Reference< css::uno::XComponentContext> const &xContext,
+    css::uno::Reference< css::deployment::XExtensionManager> const & xExtMgr,
+    css::uno::Reference< css::deployment::XUpdateInformationProvider > const & updateInformation,
+    std::vector< css::uno::Reference< css::deployment::XPackage > > const * extensionList,
+    std::vector< std::pair< css::uno::Reference<
+    css::deployment::XPackage>, css::uno::Any> > & out_errors);
+
+/* returns the highest version from the provided arguments.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+OUString getHighestVersion(
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_version.hxx b/desktop/source/deployment/inc/dp_version.hxx
new file mode 100644
index 000000000..342e2bf8c
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_version.hxx
@@ -0,0 +1,36 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <rtl/ustring.hxx>
+#include "dp_misc_api.hxx"
+
+
+namespace dp_misc {
+
+enum Order { LESS, EQUAL, GREATER };
+
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC Order compareVersions(
+    OUString const & version1, OUString const & version2);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/dp_xml.h b/desktop/source/deployment/inc/dp_xml.h
new file mode 100644
index 000000000..608073328
--- /dev/null
+++ b/desktop/source/deployment/inc/dp_xml.h
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/xml/sax/XDocumentHandler.hpp>
+
+
+namespace ucbhelper
+{
+class Content;
+}
+
+namespace dp_misc
+{
+
+
+void xml_parse(
+    css::uno::Reference< css::xml::sax::XDocumentHandler > const & xDocHandler,
+    ::ucbhelper::Content & ucb_content,
+    css::uno::Reference< css::uno::XComponentContext > const & xContext );
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/inc/lockfile.hxx b/desktop/source/deployment/inc/lockfile.hxx
new file mode 100644
index 000000000..982a0c2f0
--- /dev/null
+++ b/desktop/source/deployment/inc/lockfile.hxx
@@ -0,0 +1,89 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+/* Information:
+ * This class implements a mechanism to lock a users installation directory,
+ * which is necessary because instances of staroffice could be running on
+ * different hosts while using the same directory thus causing data
+ * inconsistency.
+ * When an existing lock is detected, the user will be asked whether he wants
+ * to continue anyway, thus removing the lock and replacing it with a new one
+ *
+ * ideas:
+ * - store information about user and host and time in the lockfile and display
+ * these when asking whether to remove the lockfile.
+ * - periodically check the lockfile and warn the user when it gets replaced
+ *
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+
+#include "dp_misc_api.hxx"
+
+#define LOCKFILE_GROUP    "Lockdata"
+#define LOCKFILE_USERKEY  "User"
+#define LOCKFILE_HOSTKEY  "Host"
+#define LOCKFILE_STAMPKEY "Stamp"
+#define LOCKFILE_TIMEKEY  "Time"
+#define LOCKFILE_IPCKEY   "IPCServer"
+
+namespace desktop {
+
+    class Lockfile;
+    bool Lockfile_execWarning( Lockfile const * that );
+
+    class DESKTOP_DEPLOYMENTMISC_DLLPUBLIC Lockfile
+    {
+    public:
+
+        // constructs a new lockfile object
+        Lockfile( bool bIPCserver = true );
+
+        // separating GUI code:
+        typedef bool (* fpExecWarning)( Lockfile const * that );
+
+        // checks the lockfile, asks user when lockfile is
+        // found (iff gui) and returns false when we may not continue
+        bool check( fpExecWarning execWarning );
+
+        // removes the lockfile
+        ~Lockfile();
+
+    private:
+        bool m_bIPCserver;
+        // full qualified name (file://-url) of the lockfile
+        OUString m_aLockname;
+        // flag whether the d'tor should delete the lock
+        bool m_bRemove;
+        bool m_bIsLocked;
+        // ID
+        OUString m_aId;
+        OUString m_aDate;
+        // access to data in file
+        void syncToFile() const;
+        bool isStale() const;
+        friend bool Lockfile_execWarning( Lockfile const * that );
+
+    };
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_activepackages.cxx b/desktop/source/deployment/manager/dp_activepackages.cxx
new file mode 100644
index 000000000..c1c5f2b28
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_activepackages.cxx
@@ -0,0 +1,217 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_extensions.h>
+
+#include <sal/config.h>
+
+#include <string_view>
+#include <utility>
+
+#include <osl/diagnose.h>
+#include <rtl/string.hxx>
+#include <rtl/textenc.h>
+#include <rtl/ustring.hxx>
+
+#include <dp_identifier.hxx>
+#include "dp_activepackages.hxx"
+
+// Old format of database entry:
+//   key: UTF8(filename)
+//   value: UTF8(tempname ";" mediatype)
+// New format of database entry:
+//   key: 0xFF UTF8(identifier)
+//   value: UTF8(tempname) 0xFF UTF8(filename) 0xFF UTF8(mediatype)
+
+#if HAVE_FEATURE_EXTENSIONS
+
+namespace {
+
+constexpr const char separator[] = "\xff";
+
+OString oldKey(std::u16string_view fileName) {
+    return OUStringToOString(fileName, RTL_TEXTENCODING_UTF8);
+}
+
+OString newKey(std::u16string_view id) {
+    return separator + OUStringToOString(id, RTL_TEXTENCODING_UTF8);
+}
+
+::dp_manager::ActivePackages::Data decodeOldData(
+    OUString const & fileName, OString const & value)
+{
+    ::dp_manager::ActivePackages::Data d;
+    sal_Int32 i = value.indexOf(';');
+    OSL_ASSERT(i >= 0);
+    d.temporaryName = OUString(value.getStr(), i, RTL_TEXTENCODING_UTF8);
+    d.fileName = fileName;
+    d.mediaType = OUString(
+        value.getStr() + i + 1, value.getLength() - i - 1,
+        RTL_TEXTENCODING_UTF8);
+    return d;
+}
+
+::dp_manager::ActivePackages::Data decodeNewData(OString const & value) {
+    ::dp_manager::ActivePackages::Data d;
+    sal_Int32 i1 = value.indexOf(separator);
+    OSL_ASSERT(i1 >= 0);
+    d.temporaryName = OUString(
+        value.getStr(), i1, RTL_TEXTENCODING_UTF8);
+    sal_Int32 i2 = value.indexOf(separator, i1 + 1);
+    OSL_ASSERT(i2 >= 0);
+    d.fileName = OUString(
+        value.getStr() + i1 + 1, i2 - i1 - 1, RTL_TEXTENCODING_UTF8);
+    sal_Int32 i3 = value.indexOf(separator, i2 + 1);
+
+    if (i3 < 0)
+    {
+        //Before ActivePackages::Data::version was added
+        d.mediaType = OUString(
+            value.getStr() + i2 + 1, value.getLength() - i2 - 1,
+            RTL_TEXTENCODING_UTF8);
+    }
+    else
+    {
+        sal_Int32 i4 = value.indexOf(separator, i3 + 1);
+        d.mediaType = OUString(
+            value.getStr() + i2 + 1, i3 - i2 -1, RTL_TEXTENCODING_UTF8);
+        d.version = OUString(
+            value.getStr() + i3 + 1, i4 - i3 - 1,
+            RTL_TEXTENCODING_UTF8);
+        d.failedPrerequisites = OUString(
+            value.getStr() + i4 + 1, value.getLength() - i4 - 1,
+            RTL_TEXTENCODING_UTF8);
+    }
+    return d;
+}
+
+}
+#endif
+
+namespace dp_manager {
+
+ActivePackages::ActivePackages() {}
+
+ActivePackages::ActivePackages(OUString const & url)
+#if HAVE_FEATURE_EXTENSIONS
+    : m_map(url)
+#endif
+{
+#if !HAVE_FEATURE_EXTENSIONS
+    (void) url;
+#endif
+}
+
+ActivePackages::~ActivePackages() {}
+
+bool ActivePackages::has(
+    OUString const & id, OUString const & fileName) const
+{
+    return get(nullptr, id, fileName);
+}
+
+bool ActivePackages::get(
+    Data * data, OUString const & id, OUString const & fileName)
+    const
+{
+#if HAVE_FEATURE_EXTENSIONS
+    OString v;
+    if (m_map.get(&v, newKey(id))) {
+        if (data != nullptr) {
+            *data = decodeNewData(v);
+        }
+        return true;
+    } else if (m_map.get(&v, oldKey(fileName))) {
+        if (data != nullptr) {
+            *data = decodeOldData(fileName, v);
+        }
+        return true;
+    } else {
+        return false;
+    }
+#else
+    (void) data;
+    (void) id;
+    (void) fileName;
+    (void) this;
+    return false;
+#endif
+}
+
+ActivePackages::Entries ActivePackages::getEntries() const {
+    Entries es;
+#if HAVE_FEATURE_EXTENSIONS
+    ::dp_misc::t_string2string_map m(m_map.getEntries());
+    for (auto const& elem : m)
+    {
+        if (!elem.first.isEmpty() && elem.first[0] == separator[0]) {
+            es.emplace_back(
+                    OUString(
+                        elem.first.getStr() + 1, elem.first.getLength() - 1,
+                        RTL_TEXTENCODING_UTF8),
+                    decodeNewData(elem.second));
+        } else {
+            OUString fn(
+                OStringToOUString(elem.first, RTL_TEXTENCODING_UTF8));
+            es.emplace_back(
+                    ::dp_misc::generateLegacyIdentifier(fn),
+                    decodeOldData(fn, elem.second));
+        }
+    }
+#else
+    (void) this;
+#endif
+    return es;
+}
+
+void ActivePackages::put(OUString const & id, Data const & data) {
+#if HAVE_FEATURE_EXTENSIONS
+    OString b =
+        OUStringToOString(data.temporaryName, RTL_TEXTENCODING_UTF8) +
+        separator +
+        OUStringToOString(data.fileName, RTL_TEXTENCODING_UTF8) +
+        separator +
+        OUStringToOString(data.mediaType, RTL_TEXTENCODING_UTF8) +
+        separator +
+        OUStringToOString(data.version, RTL_TEXTENCODING_UTF8) +
+        separator +
+        OUStringToOString(data.failedPrerequisites, RTL_TEXTENCODING_UTF8);
+    m_map.put(newKey(id), b);
+#else
+    (void) id;
+    (void) data;
+    (void) this;
+#endif
+}
+
+void ActivePackages::erase(
+    OUString const & id, OUString const & fileName)
+{
+#if HAVE_FEATURE_EXTENSIONS
+    m_map.erase(newKey(id)) || m_map.erase(oldKey(fileName));
+#else
+    (void) id;
+    (void) fileName;
+    (void) this;
+#endif
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_activepackages.hxx b/desktop/source/deployment/manager/dp_activepackages.hxx
new file mode 100644
index 000000000..fae938019
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_activepackages.hxx
@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <config_extensions.h>
+
+#include <sal/config.h>
+#include <rtl/ustring.hxx>
+
+#include <utility>
+#include <vector>
+
+#if HAVE_FEATURE_EXTENSIONS
+#include <dp_persmap.h>
+#endif
+
+
+namespace dp_manager {
+
+class ActivePackages {
+public:
+    struct Data {
+        Data(): failedPrerequisites("0")
+            {}
+        /* name of the temporary file (shared, user extension) or the name of
+           the folder of the bundled extension.
+           It does not contain the trailing '_' of the folder.
+           UTF-8 encoded
+        */
+        OUString temporaryName;
+        /* The file name (shared, user) or the folder name (bundled)
+           If the key is the file name, then file name is not encoded.
+           If the key is the identifier then the file name is UTF-8 encoded.
+         */
+        OUString fileName;
+        OUString mediaType;
+        OUString version;
+        /* If this string contains the value according to
+           css::deployment::Prerequisites or "0". That is, if
+           the value is > 0 then
+           the call to XPackage::checkPrerequisites failed.
+           In this case the extension must not be registered.
+         */
+        OUString failedPrerequisites;
+    };
+
+    typedef std::vector< std::pair< OUString, Data > > Entries;
+
+    ActivePackages();
+
+    explicit ActivePackages(OUString const & url);
+
+    ~ActivePackages();
+
+    bool has(OUString const & id, OUString const & fileName)
+        const;
+
+    bool get(
+        Data * data, OUString const & id,
+        OUString const & fileName) const;
+
+    Entries getEntries() const;
+
+    void put(OUString const & id, Data const & value);
+
+    void erase(OUString const & id, OUString const & fileName);
+
+private:
+    ActivePackages(ActivePackages const &) = delete;
+    ActivePackages& operator =(ActivePackages const &) = delete;
+#if HAVE_FEATURE_EXTENSIONS
+    ::dp_misc::PersistentMap m_map;
+#endif
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_commandenvironments.cxx b/desktop/source/deployment/manager/dp_commandenvironments.cxx
new file mode 100644
index 000000000..0a25e042f
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_commandenvironments.cxx
@@ -0,0 +1,246 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <com/sun/star/deployment/VersionException.hpp>
+#include <com/sun/star/deployment/LicenseException.hpp>
+#include <com/sun/star/deployment/InstallException.hpp>
+#include <com/sun/star/deployment/DependencyException.hpp>
+#include <com/sun/star/deployment/PlatformException.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <utility>
+#include "dp_commandenvironments.hxx"
+#include <osl/diagnose.h>
+
+namespace deployment = com::sun::star::deployment;
+namespace task = com::sun::star::task;
+namespace ucb = com::sun::star::ucb;
+namespace uno = com::sun::star::uno;
+
+using ::com::sun::star::uno::Reference;
+
+namespace dp_manager {
+
+BaseCommandEnv::BaseCommandEnv()
+{
+}
+
+BaseCommandEnv::BaseCommandEnv(
+    Reference< task::XInteractionHandler> const & handler)
+    : m_forwardHandler(handler)
+{
+}
+
+BaseCommandEnv::~BaseCommandEnv()
+{
+}
+// XCommandEnvironment
+
+Reference<task::XInteractionHandler> BaseCommandEnv::getInteractionHandler()
+{
+    return this;
+}
+
+
+Reference<ucb::XProgressHandler> BaseCommandEnv::getProgressHandler()
+{
+    return this;
+}
+
+void BaseCommandEnv::handle(
+    Reference< task::XInteractionRequest> const & /*xRequest*/ )
+{
+}
+
+void BaseCommandEnv::handle_(bool approve,
+                             Reference< task::XInteractionRequest> const & xRequest )
+{
+    if (!approve)
+    {
+        //not handled so far -> forwarding
+        if (m_forwardHandler.is())
+            m_forwardHandler->handle(xRequest);
+        else
+            return; //cannot handle
+    }
+    else
+    {
+        // select:
+        uno::Sequence< Reference< task::XInteractionContinuation > > conts(
+            xRequest->getContinuations() );
+        Reference< task::XInteractionContinuation > const * pConts =
+            conts.getConstArray();
+        sal_Int32 len = conts.getLength();
+        for ( sal_Int32 pos = 0; pos < len; ++pos )
+        {
+            if (approve) {
+                Reference< task::XInteractionApprove > xInteractionApprove(
+                    pConts[ pos ], uno::UNO_QUERY );
+                if (xInteractionApprove.is()) {
+                    xInteractionApprove->select();
+                    // don't query again for ongoing continuations:
+                    approve = false;
+                }
+            }
+        }
+    }
+
+}
+
+// XProgressHandler
+void BaseCommandEnv::push( uno::Any const & /*Status*/ )
+{
+}
+
+void BaseCommandEnv::update( uno::Any const & /*Status */)
+{
+}
+
+void BaseCommandEnv::pop()
+{
+}
+
+
+TmpRepositoryCommandEnv::TmpRepositoryCommandEnv()
+{
+}
+
+TmpRepositoryCommandEnv::TmpRepositoryCommandEnv(
+    css::uno::Reference< css::task::XInteractionHandler> const & handler):
+    BaseCommandEnv(handler)
+{
+}
+// XInteractionHandler
+void TmpRepositoryCommandEnv::handle(
+    Reference< task::XInteractionRequest> const & xRequest )
+{
+    uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == uno::TypeClass_EXCEPTION );
+
+    deployment::VersionException verExc;
+    deployment::LicenseException licExc;
+    deployment::InstallException instExc;
+
+    bool approve = false;
+
+    if ((request >>= verExc)
+        || (request >>= licExc)
+        || (request >>= instExc))
+    {
+        approve = true;
+    }
+
+    handle_(approve, xRequest);
+}
+
+
+LicenseCommandEnv::LicenseCommandEnv(
+    css::uno::Reference< css::task::XInteractionHandler> const & handler,
+    bool bSuppressLicense,
+    OUString repository):
+    BaseCommandEnv(handler), m_repository(std::move(repository)),
+    m_bSuppressLicense(bSuppressLicense)
+{
+}
+// XInteractionHandler
+void LicenseCommandEnv::handle(
+    Reference< task::XInteractionRequest> const & xRequest )
+{
+    uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == uno::TypeClass_EXCEPTION );
+
+    deployment::LicenseException licExc;
+
+    bool approve = false;
+
+    if (request >>= licExc)
+    {
+        if (m_bSuppressLicense
+            || m_repository == "bundled"
+            || licExc.AcceptBy == "admin")
+        {
+            //always approve in bundled case, because we do not support
+            //showing licenses anyway.
+            //The "admin" already accepted the license when installing the
+            // shared extension
+            approve = true;
+        }
+    }
+
+    handle_(approve, xRequest);
+}
+
+
+NoLicenseCommandEnv::NoLicenseCommandEnv(
+    css::uno::Reference< css::task::XInteractionHandler> const & handler):
+    BaseCommandEnv(handler)
+{
+}
+// XInteractionHandler
+void NoLicenseCommandEnv::handle(
+    Reference< task::XInteractionRequest> const & xRequest )
+{
+    uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == uno::TypeClass_EXCEPTION );
+
+    deployment::LicenseException licExc;
+
+    bool approve = false;
+
+    if (request >>= licExc)
+    {
+        approve = true;
+    }
+    handle_(approve, xRequest);
+}
+
+SilentCheckPrerequisitesCommandEnv::SilentCheckPrerequisitesCommandEnv()
+{
+}
+
+void SilentCheckPrerequisitesCommandEnv::handle(
+       Reference< task::XInteractionRequest> const & xRequest )
+{
+    uno::Any request( xRequest->getRequest() );
+    OSL_ASSERT( request.getValueTypeClass() == uno::TypeClass_EXCEPTION );
+
+    deployment::LicenseException licExc;
+    deployment::PlatformException platformExc;
+    deployment::DependencyException depExc;
+
+    if (request >>= licExc)
+    {
+        handle_(true, xRequest); // approve = true
+    }
+    else if ((request >>= platformExc)
+             || (request >>= depExc))
+    {
+        m_Exception = request;
+    }
+    else
+    {
+        m_UnknownException = request;
+    }
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_commandenvironments.hxx b/desktop/source/deployment/manager/dp_commandenvironments.hxx
new file mode 100644
index 000000000..6533d45b4
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_commandenvironments.hxx
@@ -0,0 +1,139 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/task/XInteractionRequest.hpp>
+#include <com/sun/star/ucb/XProgressHandler.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+
+
+namespace dp_manager {
+
+/**
+   This command environment is to be used when an extension is temporarily
+   stored in the "tmp" repository. It prevents all kind of user interaction.
+ */
+class BaseCommandEnv
+    : public ::cppu::WeakImplHelper< css::ucb::XCommandEnvironment,
+                                      css::task::XInteractionHandler,
+                                      css::ucb::XProgressHandler >
+{
+    css::uno::Reference< css::task::XInteractionHandler> m_forwardHandler;
+protected:
+    void handle_(bool approve,
+                 css::uno::Reference< css::task::XInteractionRequest> const & xRequest );
+public:
+    virtual ~BaseCommandEnv() override;
+    BaseCommandEnv();
+    explicit BaseCommandEnv(
+        css::uno::Reference< css::task::XInteractionHandler> const & handler);
+
+    // XCommandEnvironment
+    virtual css::uno::Reference<css::task::XInteractionHandler > SAL_CALL
+    getInteractionHandler() override;
+    virtual css::uno::Reference<css::ucb::XProgressHandler >
+    SAL_CALL getProgressHandler() override;
+
+    // XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+    // XProgressHandler
+    virtual void SAL_CALL push( css::uno::Any const & Status ) override;
+    virtual void SAL_CALL update( css::uno::Any const & Status ) override;
+    virtual void SAL_CALL pop() override;
+};
+
+class TmpRepositoryCommandEnv : public BaseCommandEnv
+{
+public:
+    TmpRepositoryCommandEnv();
+    explicit TmpRepositoryCommandEnv(css::uno::Reference< css::task::XInteractionHandler> const & handler);
+
+// XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+};
+
+/** this class is for use in XPackageManager::synchronize.
+
+    It handles particular license cases.
+ */
+class LicenseCommandEnv : public BaseCommandEnv
+{
+private:
+    OUString m_repository;
+    bool m_bSuppressLicense;
+public:
+    LicenseCommandEnv(
+        css::uno::Reference< css::task::XInteractionHandler> const & handler,
+        bool bSuppressLicense,
+        OUString repository);
+
+// XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+};
+
+/** this class is for use in XPackageManager::checkPrerequisites
+
+    It always prohibits a license interaction
+ */
+class NoLicenseCommandEnv : public BaseCommandEnv
+{
+
+public:
+    explicit NoLicenseCommandEnv(css::uno::Reference< css::task::XInteractionHandler> const & handler);
+
+// XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+};
+
+/* For use in XExtensionManager::addExtension in the call to
+   XPackage::checkPrerequisites
+   It prevents all user interactions. The license is always accepted.
+   It remembers if there was a platform or a dependency exception in
+   the member m_bException. if there was any other exception then m_bUnknownException
+   is set.
+
+ */
+class SilentCheckPrerequisitesCommandEnv : public BaseCommandEnv
+{
+public:
+    SilentCheckPrerequisitesCommandEnv();
+    // XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+
+    // Set to true if a PlatformException or a DependencyException were handled.
+    css::uno::Any m_Exception;
+    // Set to true if an unknown exception was handled.
+    css::uno::Any m_UnknownException;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_extensionmanager.cxx b/desktop/source/deployment/manager/dp_extensionmanager.cxx
new file mode 100644
index 000000000..fc7816f6a
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_extensionmanager.cxx
@@ -0,0 +1,1432 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <rtl/bootstrap.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/XExtensionManager.hpp>
+#include <com/sun/star/deployment/thePackageManagerFactory.hpp>
+#include <com/sun/star/deployment/XPackageManager.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/deployment/InstallException.hpp>
+#include <com/sun/star/deployment/VersionException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+#include <com/sun/star/beans/Ambiguous.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/util/XModifyBroadcaster.hpp>
+#include <comphelper/sequence.hxx>
+#include <utility>
+#include <xmlscript/xml_helper.hxx>
+#include <osl/diagnose.h>
+#include <dp_interact.h>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <dp_identifier.hxx>
+#include <dp_descriptioninfoset.hxx>
+#include "dp_extensionmanager.hxx"
+#include "dp_commandenvironments.hxx"
+#include "dp_properties.hxx"
+
+#include <vector>
+#include <algorithm>
+#include <set>
+#include <string_view>
+
+namespace lang  = com::sun::star::lang;
+namespace task = com::sun::star::task;
+namespace ucb = com::sun::star::ucb;
+namespace uno = com::sun::star::uno;
+namespace beans = com::sun::star::beans;
+namespace util = com::sun::star::util;
+
+using ::com::sun::star::uno::Reference;
+
+namespace {
+
+struct CompIdentifiers
+{
+    bool operator() (std::vector<Reference<css::deployment::XPackage> > const & a,
+                     std::vector<Reference<css::deployment::XPackage> > const & b)
+        {
+            return getName(a).compareTo(getName(b)) < 0;
+        }
+
+    static OUString getName(std::vector<Reference<css::deployment::XPackage> > const & a);
+};
+
+OUString CompIdentifiers::getName(std::vector<Reference<css::deployment::XPackage> > const & a)
+{
+    OSL_ASSERT(a.size() == 3);
+    //get the first non-null reference
+    Reference<css::deployment::XPackage>  extension;
+    for (auto const& elem : a)
+    {
+        if (elem.is())
+        {
+            extension = elem;
+            break;
+        }
+    }
+    OSL_ASSERT(extension.is());
+    return extension->getDisplayName();
+}
+
+void writeLastModified(OUString & url, Reference<ucb::XCommandEnvironment> const & xCmdEnv, Reference< uno::XComponentContext > const & xContext)
+{
+    //Write the lastmodified file
+    try {
+        ::rtl::Bootstrap::expandMacros(url);
+        ::ucbhelper::Content ucbStamp(url, xCmdEnv, xContext);
+        dp_misc::erase_path( url, xCmdEnv );
+        OString stamp("1" );
+        Reference<css::io::XInputStream> xData(
+            ::xmlscript::createInputStream(
+                    reinterpret_cast<sal_Int8 const *>(stamp.getStr()),
+                    stamp.getLength() ) );
+        ucbStamp.writeStream( xData, true /* replace existing */ );
+    }
+    catch(...)
+    {
+        uno::Any exc(::cppu::getCaughtException());
+        throw css::deployment::DeploymentException("Failed to update" + url, nullptr, exc);
+    }
+}
+
+class ExtensionRemoveGuard
+{
+    css::uno::Reference<css::deployment::XPackage> m_extension;
+    css::uno::Reference<css::deployment::XPackageManager> m_xPackageManager;
+
+public:
+    ExtensionRemoveGuard(){};
+    ExtensionRemoveGuard(
+        css::uno::Reference<css::deployment::XPackage> extension,
+        css::uno::Reference<css::deployment::XPackageManager> xPackageManager):
+        m_extension(std::move(extension)), m_xPackageManager(std::move(xPackageManager)) {}
+    ~ExtensionRemoveGuard();
+
+    void set(css::uno::Reference<css::deployment::XPackage> const & extension,
+             css::uno::Reference<css::deployment::XPackageManager> const & xPackageManager) {
+        m_extension = extension;
+        m_xPackageManager = xPackageManager;
+    }
+};
+
+ExtensionRemoveGuard::~ExtensionRemoveGuard()
+{
+    try {
+        OSL_ASSERT(!(m_extension.is() && !m_xPackageManager.is()));
+        if (m_xPackageManager.is() && m_extension.is())
+            m_xPackageManager->removePackage(
+                dp_misc::getIdentifier(m_extension), OUString(),
+                css::uno::Reference<css::task::XAbortChannel>(),
+                css::uno::Reference<css::ucb::XCommandEnvironment>());
+    } catch (...) {
+        OSL_ASSERT(false);
+    }
+}
+
+}
+
+namespace dp_manager {
+
+//ToDo: bundled extension
+ExtensionManager::ExtensionManager( Reference< uno::XComponentContext > const& xContext) :
+    ::cppu::WeakComponentImplHelper< css::deployment::XExtensionManager, css::lang::XServiceInfo >(m_aMutex)
+    , m_xContext(xContext)
+{
+    m_xPackageManagerFactory = css::deployment::thePackageManagerFactory::get(m_xContext);
+    OSL_ASSERT(m_xPackageManagerFactory.is());
+
+    m_repositoryNames.emplace_back("user");
+    m_repositoryNames.emplace_back("shared");
+    m_repositoryNames.emplace_back("bundled");
+}
+
+ExtensionManager::~ExtensionManager()
+{
+}
+
+// XServiceInfo
+OUString ExtensionManager::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.ExtensionManager";
+}
+
+sal_Bool ExtensionManager::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > ExtensionManager::getSupportedServiceNames()
+{
+    // a private one:
+    return { "com.sun.star.comp.deployment.ExtensionManager" };
+}
+
+Reference<css::deployment::XPackageManager> ExtensionManager::getUserRepository()
+{
+    return m_xPackageManagerFactory->getPackageManager("user");
+}
+Reference<css::deployment::XPackageManager>  ExtensionManager::getSharedRepository()
+{
+    return m_xPackageManagerFactory->getPackageManager("shared");
+}
+Reference<css::deployment::XPackageManager>  ExtensionManager::getBundledRepository()
+{
+    return m_xPackageManagerFactory->getPackageManager("bundled");
+}
+Reference<css::deployment::XPackageManager>  ExtensionManager::getTmpRepository()
+{
+    return m_xPackageManagerFactory->getPackageManager("tmp");
+}
+Reference<css::deployment::XPackageManager>  ExtensionManager::getBakRepository()
+{
+    return m_xPackageManagerFactory->getPackageManager("bak");
+}
+
+Reference<task::XAbortChannel> ExtensionManager::createAbortChannel()
+{
+    return new dp_misc::AbortChannel;
+}
+
+css::uno::Reference<css::deployment::XPackageManager>
+ExtensionManager::getPackageManager(std::u16string_view repository)
+{
+    Reference<css::deployment::XPackageManager> xPackageManager;
+    if (repository == u"user")
+        xPackageManager = getUserRepository();
+    else if (repository == u"shared")
+        xPackageManager = getSharedRepository();
+    else if (repository == u"bundled")
+        xPackageManager = getBundledRepository();
+    else if (repository == u"tmp")
+        xPackageManager = getTmpRepository();
+    else if (repository == u"bak")
+        xPackageManager = getBakRepository();
+    else
+        throw lang::IllegalArgumentException(
+            "No valid repository name provided.",
+            static_cast<cppu::OWeakObject*>(this), 0);
+    return xPackageManager;
+}
+
+/*
+  Enters the XPackage objects into a map. They must be all from the
+  same repository. The value type of the map is a vector, where each vector
+  represents an extension with a particular identifier. The first member
+  represents the user extension, the second the shared extension and the
+  third the bundled extension.
+ */
+void ExtensionManager::addExtensionsToMap(
+    id2extensions & mapExt,
+    uno::Sequence<Reference<css::deployment::XPackage> > const & seqExt,
+    std::u16string_view repository)
+{
+    //Determine the index in the vector where these extensions are to be
+    //added.
+    int index = 0;
+    for (auto const& repositoryName : m_repositoryNames)
+    {
+        if (repositoryName == repository)
+            break;
+        ++index;
+    }
+
+    for (const Reference<css::deployment::XPackage>& xExtension : seqExt)
+    {
+        OUString id = dp_misc::getIdentifier(xExtension);
+        id2extensions::iterator ivec =  mapExt.find(id);
+        if (ivec == mapExt.end())
+        {
+            std::vector<Reference<css::deployment::XPackage> > vec(3);
+            vec[index] = xExtension;
+            mapExt[id] = vec;
+        }
+        else
+        {
+            ivec->second[index] = xExtension;
+        }
+    }
+}
+
+/*
+   returns a list containing extensions with the same identifier from
+   all repositories (user, shared, bundled). If one repository does not
+   have this extension, then the list contains an empty Reference. The list
+   is ordered according to the priority of the repositories:
+   1. user
+   2. shared
+   3. bundled
+
+   The number of elements is always three, unless the number of repository
+   changes.
+ */
+std::vector<Reference<css::deployment::XPackage> >
+    ExtensionManager::getExtensionsWithSameId(
+        OUString const & identifier, OUString const & fileName)
+
+{
+    std::vector<Reference<css::deployment::XPackage> > extensionList;
+    Reference<css::deployment::XPackageManager> lRepos[] = {
+          getUserRepository(), getSharedRepository(), getBundledRepository() };
+    for (int i(0); i != SAL_N_ELEMENTS(lRepos); ++i)
+    {
+        Reference<css::deployment::XPackage> xPackage;
+        try
+        {
+            xPackage = lRepos[i]->getDeployedPackage(
+                identifier, fileName, Reference<ucb::XCommandEnvironment>());
+        }
+        catch(const lang::IllegalArgumentException &)
+        {
+            // thrown if the extension does not exist in this repository
+        }
+        extensionList.push_back(xPackage);
+    }
+    OSL_ASSERT(extensionList.size() == 3);
+    return extensionList;
+}
+
+uno::Sequence<Reference<css::deployment::XPackage> >
+ExtensionManager::getExtensionsWithSameIdentifier(
+        OUString const & identifier,
+        OUString const & fileName,
+        Reference< ucb::XCommandEnvironment> const & /*xCmdEnv*/ )
+{
+    try
+    {
+        std::vector<Reference<css::deployment::XPackage> > listExtensions =
+            getExtensionsWithSameId(identifier, fileName);
+        bool bHasExtension = false;
+
+        //throw an IllegalArgumentException if there is no extension at all.
+        for (auto const& extension : listExtensions)
+            bHasExtension |= extension.is();
+        if (!bHasExtension)
+            throw lang::IllegalArgumentException(
+                "Could not find extension: " + identifier + ", " + fileName,
+                static_cast<cppu::OWeakObject*>(this), -1);
+
+        return comphelper::containerToSequence(listExtensions);
+    }
+    catch ( const css::deployment::DeploymentException & )
+    {
+        throw;
+    }
+    catch ( const ucb::CommandFailedException & )
+    {
+        throw;
+    }
+    catch (css::uno::RuntimeException &)
+    {
+        throw;
+    }
+    catch (...)
+    {
+        uno::Any exc = ::cppu::getCaughtException();
+        throw css::deployment::DeploymentException(
+            "Extension Manager: exception during getExtensionsWithSameIdentifier",
+            static_cast<OWeakObject*>(this), exc);
+    }
+}
+
+bool ExtensionManager::isUserDisabled(
+    OUString const & identifier, OUString const & fileName)
+{
+    std::vector<Reference<css::deployment::XPackage> > listExtensions;
+
+    try {
+        listExtensions = getExtensionsWithSameId(identifier, fileName);
+    } catch ( const lang::IllegalArgumentException & ) {
+    }
+    OSL_ASSERT(listExtensions.size() == 3);
+
+    return isUserDisabled( ::comphelper::containerToSequence(listExtensions) );
+}
+
+bool ExtensionManager::isUserDisabled(
+    uno::Sequence<Reference<css::deployment::XPackage> > const & seqExtSameId)
+{
+    OSL_ASSERT(seqExtSameId.getLength() == 3);
+    Reference<css::deployment::XPackage> const & userExtension = seqExtSameId[0];
+    if (userExtension.is())
+    {
+        beans::Optional<beans::Ambiguous<sal_Bool> > reg =
+            userExtension->isRegistered(Reference<task::XAbortChannel>(),
+                                        Reference<ucb::XCommandEnvironment>());
+        //If the value is ambiguous, then we assume that the extension
+        //is enabled, but something went wrong during enabling. We do not
+        //automatically disable user extensions.
+        if (reg.IsPresent &&
+            ! reg.Value.IsAmbiguous && ! reg.Value.Value)
+            return true;
+    }
+    return false;
+}
+
+/*
+    This method determines the active extension (XPackage.registerPackage) with a
+    particular identifier.
+
+    The parameter bUserDisabled determines if the user extension is disabled.
+
+    When the user repository contains an extension with the given identifier and
+    it is not disabled by the user, then it is always registered.  Otherwise an
+    extension is only registered when there is no registered extension in one of
+    the repositories with a higher priority. That is, if the extension is from
+    the shared repository and an active extension with the same identifier is in
+    the user repository, then the extension is not registered. Similarly a
+    bundled extension is not registered if there is an active extension with the
+    same identifier in the shared or user repository.
+*/
+void ExtensionManager::activateExtension(
+    OUString const & identifier, OUString const & fileName,
+    bool bUserDisabled,
+    bool bStartup,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    std::vector<Reference<css::deployment::XPackage> > listExtensions;
+    try {
+        listExtensions = getExtensionsWithSameId(identifier, fileName);
+    } catch (const lang::IllegalArgumentException &) {
+    }
+    OSL_ASSERT(listExtensions.size() == 3);
+
+    activateExtension(
+        ::comphelper::containerToSequence(listExtensions),
+        bUserDisabled, bStartup, xAbortChannel, xCmdEnv);
+
+    fireModified();
+}
+
+void ExtensionManager::activateExtension(
+    uno::Sequence<Reference<css::deployment::XPackage> > const & seqExt,
+    bool bUserDisabled,
+    bool bStartup,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    bool bActive = false;
+    sal_Int32 len = seqExt.getLength();
+    for (sal_Int32 i = 0; i < len; i++)
+    {
+        Reference<css::deployment::XPackage> const & aExt =  seqExt[i];
+        if (aExt.is())
+        {
+            //get the registration value of the current iteration
+            beans::Optional<beans::Ambiguous<sal_Bool> > optReg =
+                aExt->isRegistered(xAbortChannel, xCmdEnv);
+            //If nothing can be registered then break
+            if (!optReg.IsPresent)
+                break;
+
+            //Check if this is a disabled user extension,
+            if (i == 0 && bUserDisabled)
+            {
+                   aExt->revokePackage(bStartup, xAbortChannel, xCmdEnv);
+                   continue;
+            }
+
+            //If we have already determined an active extension then we must
+            //make sure to unregister all extensions with the same id in
+            //repositories with a lower priority
+            if (bActive)
+            {
+                aExt->revokePackage(bStartup, xAbortChannel, xCmdEnv);
+            }
+            else
+            {
+                //This is the first extension in the ordered list, which becomes
+                //the active extension
+                bActive = true;
+                //Register if not already done.
+                //reregister if the value is ambiguous, which indicates that
+                //something went wrong during last registration.
+                aExt->registerPackage(bStartup, xAbortChannel, xCmdEnv);
+            }
+        }
+    }
+}
+
+Reference<css::deployment::XPackage> ExtensionManager::backupExtension(
+    OUString const & identifier, OUString const & fileName,
+    Reference<css::deployment::XPackageManager> const & xPackageManager,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    Reference<css::deployment::XPackage> xBackup;
+    Reference<ucb::XCommandEnvironment> tmpCmdEnv(
+        new TmpRepositoryCommandEnv(xCmdEnv->getInteractionHandler()));
+    Reference<css::deployment::XPackage> xOldExtension = xPackageManager->getDeployedPackage(
+            identifier, fileName, tmpCmdEnv);
+
+    if (xOldExtension.is())
+    {
+        xBackup = getTmpRepository()->addPackage(
+            xOldExtension->getURL(), uno::Sequence<beans::NamedValue>(),
+            OUString(), Reference<task::XAbortChannel>(), tmpCmdEnv);
+
+        OSL_ENSURE(xBackup.is(), "Failed to backup extension");
+    }
+    return xBackup;
+}
+
+//The supported package types are actually determined by the registry. However
+//creating a registry
+//(desktop/source/deployment/registry/dp_registry.cxx:PackageRegistryImpl) will
+//create all the backends, so that the registry can obtain from them the package
+//types. Creating the registry will also set up the registry folder containing
+//all the subfolders for the respective backends.
+//Because all repositories support the same backends, we can just delegate this
+//call to one of the repositories.
+uno::Sequence< Reference<css::deployment::XPackageTypeInfo> >
+ExtensionManager::getSupportedPackageTypes()
+{
+    return getUserRepository()->getSupportedPackageTypes();
+}
+//Do some necessary checks and user interaction. This function does not
+//acquire the extension manager mutex and that mutex must not be acquired
+//when this function is called. doChecksForAddExtension does  synchronous
+//user interactions which may require acquiring the solar mutex.
+//Returns true if the extension can be installed.
+bool ExtensionManager::doChecksForAddExtension(
+    Reference<css::deployment::XPackageManager> const & xPackageMgr,
+    uno::Sequence<beans::NamedValue> const & properties,
+    css::uno::Reference<css::deployment::XPackage> const & xTmpExtension,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+    Reference<css::deployment::XPackage> & out_existingExtension )
+{
+    try
+    {
+        Reference<css::deployment::XPackage> xOldExtension;
+        const OUString sIdentifier = dp_misc::getIdentifier(xTmpExtension);
+        const OUString sFileName = xTmpExtension->getName();
+        const OUString sDisplayName = xTmpExtension->getDisplayName();
+        const OUString sVersion = xTmpExtension->getVersion();
+
+        try
+        {
+            xOldExtension = xPackageMgr->getDeployedPackage(
+                sIdentifier, sFileName, xCmdEnv);
+            out_existingExtension = xOldExtension;
+        }
+        catch (const lang::IllegalArgumentException &)
+        {
+        }
+        bool bCanInstall = false;
+
+        //This part is not guarded against other threads removing, adding, disabling ...
+        //etc. the same extension.
+        //checkInstall is safe because it notifies the user if the extension is not yet
+        //installed in the same repository. Because addExtension has its own guard
+        //(m_addMutex), another thread cannot add the extension in the meantime.
+        //checkUpdate is called if the same extension exists in the same
+        //repository. The user is asked if they want to replace it.  Another
+        //thread
+        //could already remove the extension. So asking the user was not
+        //necessary. No harm is done. The other thread may also ask the user
+        //if he wants to remove the extension. This depends on the
+        //XCommandEnvironment which it passes to removeExtension.
+        if (xOldExtension.is())
+        {
+            //throws a CommandFailedException if the user cancels
+            //the action.
+            checkUpdate(sVersion, sDisplayName,xOldExtension, xCmdEnv);
+        }
+        else
+        {
+            //throws a CommandFailedException if the user cancels
+            //the action.
+            checkInstall(sDisplayName, xCmdEnv);
+        }
+        //Prevent showing the license if requested.
+        Reference<ucb::XCommandEnvironment> _xCmdEnv(xCmdEnv);
+        ExtensionProperties props(std::u16string_view(), properties, Reference<ucb::XCommandEnvironment>(), m_xContext);
+
+        dp_misc::DescriptionInfoset info(dp_misc::getDescriptionInfoset(xTmpExtension->getURL()));
+        const ::std::optional<dp_misc::SimpleLicenseAttributes> licenseAttributes =
+            info.getSimpleLicenseAttributes();
+
+        if (licenseAttributes && licenseAttributes->suppressIfRequired
+            && props.isSuppressedLicense())
+            _xCmdEnv.set(new NoLicenseCommandEnv(xCmdEnv->getInteractionHandler()));
+
+        bCanInstall = xTmpExtension->checkPrerequisites(
+            xAbortChannel, _xCmdEnv, xOldExtension.is() || props.isExtensionUpdate()) == 0;
+
+        return bCanInstall;
+    }
+    catch ( const css::deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (const uno::Exception &) {
+        uno::Any excOccurred = ::cppu::getCaughtException();
+        css::deployment::DeploymentException exc(
+            "Extension Manager: exception in doChecksForAddExtension",
+            static_cast<OWeakObject*>(this), excOccurred);
+        throw exc;
+    } catch (...) {
+        throw uno::RuntimeException(
+            "Extension Manager: unexpected exception in doChecksForAddExtension",
+            static_cast<OWeakObject*>(this));
+    }
+}
+
+// Only add to shared and user repository
+Reference<css::deployment::XPackage> ExtensionManager::addExtension(
+    OUString const & url, uno::Sequence<beans::NamedValue> const & properties,
+    OUString const & repository,
+        Reference<task::XAbortChannel> const & xAbortChannel,
+        Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    Reference<css::deployment::XPackage> xNewExtension;
+    //Determine the repository to use
+    Reference<css::deployment::XPackageManager> xPackageManager;
+    if (repository == "user")
+        xPackageManager = getUserRepository();
+    else if (repository == "shared")
+        xPackageManager = getSharedRepository();
+    else
+        throw lang::IllegalArgumentException(
+            "No valid repository name provided.",
+            static_cast<cppu::OWeakObject*>(this), 0);
+    //We must make sure that the xTmpExtension is not create twice, because this
+    //would remove the first one.
+    ::osl::MutexGuard addGuard(m_addMutex);
+
+    Reference<css::deployment::XPackageManager> xTmpRepository(getTmpRepository());
+        // make sure xTmpRepository is alive as long as xTmpExtension is; as
+        // the "tmp" manager is only held weakly by m_xPackageManagerFactory, it
+        // could otherwise be disposed early, which would in turn dispose
+        // xTmpExtension's PackageRegistryBackend behind its back
+    Reference<css::deployment::XPackage> xTmpExtension(
+        xTmpRepository->addPackage(
+            url, uno::Sequence<beans::NamedValue>(), OUString(), xAbortChannel,
+            new TmpRepositoryCommandEnv()));
+    if (!xTmpExtension.is()) {
+        throw css::deployment::DeploymentException(
+            ("Extension Manager: Failed to create temporary XPackage for url: "
+             + url),
+            static_cast<OWeakObject*>(this), uno::Any());
+    }
+
+    //Make sure the extension is removed from the tmp repository in case
+    //of an exception
+    ExtensionRemoveGuard tmpExtensionRemoveGuard(xTmpExtension, getTmpRepository());
+    ExtensionRemoveGuard bakExtensionRemoveGuard;
+    const OUString sIdentifier = dp_misc::getIdentifier(xTmpExtension);
+    const OUString sFileName = xTmpExtension->getName();
+    Reference<css::deployment::XPackage> xOldExtension;
+    Reference<css::deployment::XPackage> xExtensionBackup;
+
+    uno::Any excOccurred2;
+    bool bCanInstall = doChecksForAddExtension(
+        xPackageManager,
+        properties,
+        xTmpExtension,
+        xAbortChannel,
+        xCmdEnv,
+        xOldExtension );
+
+    {
+        bool bUserDisabled = false;
+        // In this guarded section (getMutex) we must not use the argument xCmdEnv
+        // because it may bring up dialogs (XInteractionHandler::handle) this
+        // may potentially deadlock. See issue
+        // http://qa.openoffice.org/issues/show_bug.cgi?id=114933
+        // By not providing xCmdEnv the underlying APIs will throw an exception if
+        // the XInteractionRequest cannot be handled.
+        ::osl::MutexGuard guard(m_aMutex);
+
+        if (bCanInstall)
+        {
+            try
+            {
+                bUserDisabled = isUserDisabled(sIdentifier, sFileName);
+                if (xOldExtension.is())
+                {
+                    try
+                    {
+                        xOldExtension->revokePackage(
+                            false, xAbortChannel, Reference<ucb::XCommandEnvironment>());
+                        //save the old user extension in case the user aborts
+                        xExtensionBackup = getBakRepository()->importExtension(
+                            xOldExtension, Reference<task::XAbortChannel>(),
+                            Reference<ucb::XCommandEnvironment>());
+                        bakExtensionRemoveGuard.set(xExtensionBackup, getBakRepository());
+                    }
+                    catch (const lang::DisposedException &)
+                    {
+                        //Another thread might have removed the extension meanwhile
+                    }
+                }
+                //check again dependencies but prevent user interaction,
+                //We can disregard the license, because the user must have already
+                //accepted it, when we called checkPrerequisites the first time
+                rtl::Reference<SilentCheckPrerequisitesCommandEnv> pSilentCommandEnv =
+                    new SilentCheckPrerequisitesCommandEnv();
+
+                sal_Int32 failedPrereq = xTmpExtension->checkPrerequisites(
+                    xAbortChannel, pSilentCommandEnv, true);
+                if (failedPrereq == 0)
+                {
+                    xNewExtension = xPackageManager->addPackage(
+                        url, properties, OUString(), xAbortChannel,
+                        Reference<ucb::XCommandEnvironment>());
+                    //If we add a user extension and there is already one which was
+                    //disabled by a user, then the newly installed one is enabled. If we
+                    //add to another repository then the user extension remains
+                    //disabled.
+                    bool bUserDisabled2 = bUserDisabled;
+                    if (repository == "user")
+                        bUserDisabled2 = false;
+
+                    // pass the two values via variables to workaround gcc-4.3.4 specific bug (bnc#655912)
+                    OUString sNewExtensionIdentifier = dp_misc::getIdentifier(xNewExtension);
+                    OUString sNewExtensionFileName = xNewExtension->getName();
+
+                    activateExtension(
+                        sNewExtensionIdentifier, sNewExtensionFileName,
+                        bUserDisabled2, false, xAbortChannel,
+                        Reference<ucb::XCommandEnvironment>());
+
+                    // if reached this section,
+                    // this means that either the licensedialog.ui didn't popup,
+                    // or user accepted the license agreement. otherwise
+                    // no need to call fireModified() because user declined
+                    // the license agreement therefore no change made.
+                    try
+                    {
+                        fireModified();
+
+                    }catch ( const css::deployment::DeploymentException& ) {
+                        throw;
+                    } catch ( const ucb::CommandFailedException & ) {
+                        throw;
+                    } catch ( const ucb::CommandAbortedException & ) {
+                        throw;
+                    } catch (const lang::IllegalArgumentException &) {
+                        throw;
+                    } catch (const uno::RuntimeException &) {
+                        throw;
+                    } catch (const uno::Exception &) {
+                        uno::Any excOccurred = ::cppu::getCaughtException();
+                        css::deployment::DeploymentException exc(
+                            "Extension Manager: Exception on fireModified() "
+                            "in the scope of 'if (failedPrereq == 0)'",
+                            static_cast<OWeakObject*>(this), excOccurred);
+                        throw exc;
+                    } catch (...) {
+                        throw uno::RuntimeException(
+                            "Extension Manager: RuntimeException on fireModified() "
+                            "in the scope of 'if (failedPrereq == 0)'",
+                            static_cast<OWeakObject*>(this));
+                    }
+                }
+                else
+                {
+                    if (pSilentCommandEnv->m_Exception.hasValue())
+                        ::cppu::throwException(pSilentCommandEnv->m_Exception);
+                    else if ( pSilentCommandEnv->m_UnknownException.hasValue())
+                        ::cppu::throwException(pSilentCommandEnv->m_UnknownException);
+                    else
+                        throw css::deployment::DeploymentException (
+                            "Extension Manager: exception during addExtension, ckeckPrerequisites failed",
+                            static_cast<OWeakObject*>(this), uno::Any());
+                }
+            }
+            catch ( const css::deployment::DeploymentException& ) {
+                excOccurred2 = ::cppu::getCaughtException();
+            } catch ( const ucb::CommandFailedException & ) {
+                excOccurred2 = ::cppu::getCaughtException();
+            } catch ( const ucb::CommandAbortedException & ) {
+                excOccurred2 = ::cppu::getCaughtException();
+            } catch (const lang::IllegalArgumentException &) {
+                excOccurred2 = ::cppu::getCaughtException();
+            } catch (const uno::RuntimeException &) {
+                excOccurred2 = ::cppu::getCaughtException();
+            } catch (...) {
+                excOccurred2 = ::cppu::getCaughtException();
+                css::deployment::DeploymentException exc(
+                    "Extension Manager: exception during addExtension, url: "
+                    + url, static_cast<OWeakObject*>(this), excOccurred2);
+                excOccurred2 <<= exc;
+            }
+        }
+
+        if (excOccurred2.hasValue())
+        {
+            //It does not matter what exception is thrown. We try to
+            //recover the original status.
+            //If the user aborted installation then a ucb::CommandAbortedException
+            //is thrown.
+            //Use a private AbortChannel so the user cannot interrupt.
+            try
+            {
+                if (xExtensionBackup.is())
+                {
+                    xPackageManager->importExtension(
+                            xExtensionBackup, Reference<task::XAbortChannel>(),
+                            Reference<ucb::XCommandEnvironment>());
+                }
+                activateExtension(
+                    sIdentifier, sFileName, bUserDisabled, false,
+                    Reference<task::XAbortChannel>(), Reference<ucb::XCommandEnvironment>());
+            }
+            catch (...)
+            {
+            }
+            ::cppu::throwException(excOccurred2);
+        }
+    } // leaving the guarded section (getMutex())
+
+    return xNewExtension;
+}
+
+void ExtensionManager::removeExtension(
+    OUString const & identifier, OUString const & fileName,
+    OUString const & repository,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    uno::Any excOccurred1;
+    Reference<css::deployment::XPackage> xExtensionBackup;
+    Reference<css::deployment::XPackageManager> xPackageManager;
+    bool bUserDisabled = false;
+    ::osl::MutexGuard guard(m_aMutex);
+    try
+    {
+//Determine the repository to use
+        if (repository == "user")
+            xPackageManager = getUserRepository();
+        else if (repository == "shared")
+            xPackageManager = getSharedRepository();
+        else
+            throw lang::IllegalArgumentException(
+                "No valid repository name provided.",
+                static_cast<cppu::OWeakObject*>(this), 0);
+
+        bUserDisabled = isUserDisabled(identifier, fileName);
+        //Backup the extension, in case the user cancels the action
+        xExtensionBackup = backupExtension(
+            identifier, fileName, xPackageManager, xCmdEnv);
+
+        //revoke the extension if it is active
+        Reference<css::deployment::XPackage> xOldExtension =
+            xPackageManager->getDeployedPackage(
+                identifier, fileName, xCmdEnv);
+        xOldExtension->revokePackage(false, xAbortChannel, xCmdEnv);
+
+        xPackageManager->removePackage(
+            identifier, fileName, xAbortChannel, xCmdEnv);
+        activateExtension(identifier, fileName, bUserDisabled, false,
+                          xAbortChannel, xCmdEnv);
+        fireModified();
+    }
+    catch ( const css::deployment::DeploymentException& ) {
+        excOccurred1 = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandFailedException & ) {
+        excOccurred1 = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandAbortedException & ) {
+        excOccurred1 = ::cppu::getCaughtException();
+    } catch (const lang::IllegalArgumentException &) {
+        excOccurred1 = ::cppu::getCaughtException();
+    } catch (const uno::RuntimeException &) {
+        excOccurred1 = ::cppu::getCaughtException();
+    } catch (...) {
+        excOccurred1 = ::cppu::getCaughtException();
+        css::deployment::DeploymentException exc(
+            "Extension Manager: exception during removeExtension",
+            static_cast<OWeakObject*>(this), excOccurred1);
+        excOccurred1 <<= exc;
+    }
+
+    if (excOccurred1.hasValue())
+    {
+        //User aborted installation, restore the previous situation.
+        //Use a private AbortChannel so the user cannot interrupt.
+        try
+        {
+            Reference<ucb::XCommandEnvironment> tmpCmdEnv(
+                new TmpRepositoryCommandEnv(xCmdEnv->getInteractionHandler()));
+            if (xExtensionBackup.is())
+            {
+                xPackageManager->importExtension(
+                        xExtensionBackup, Reference<task::XAbortChannel>(),
+                        tmpCmdEnv);
+                activateExtension(
+                    identifier, fileName, bUserDisabled, false,
+                    Reference<task::XAbortChannel>(),
+                    tmpCmdEnv);
+
+                getTmpRepository()->removePackage(
+                    dp_misc::getIdentifier(xExtensionBackup),
+                    xExtensionBackup->getName(), xAbortChannel, xCmdEnv);
+                fireModified();
+            }
+        }
+        catch (...)
+        {
+        }
+        ::cppu::throwException(excOccurred1);
+    }
+
+    if (xExtensionBackup.is())
+        getTmpRepository()->removePackage(
+            dp_misc::getIdentifier(xExtensionBackup),
+            xExtensionBackup->getName(), xAbortChannel, xCmdEnv);
+}
+
+// Only enable extensions from shared and user repository
+void ExtensionManager::enableExtension(
+    Reference<css::deployment::XPackage> const & extension,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    ::osl::MutexGuard guard(m_aMutex);
+    bool bUserDisabled = false;
+    uno::Any excOccurred;
+    try
+    {
+        if (!extension.is())
+            return;
+        OUString repository = extension->getRepositoryName();
+        if (repository != "user")
+            throw lang::IllegalArgumentException(
+                "No valid repository name provided.",
+                static_cast<cppu::OWeakObject*>(this), 0);
+
+        bUserDisabled = isUserDisabled(dp_misc::getIdentifier(extension),
+                                       extension->getName());
+
+        activateExtension(dp_misc::getIdentifier(extension),
+                          extension->getName(), false, false,
+                          xAbortChannel, xCmdEnv);
+    }
+    catch ( const css::deployment::DeploymentException& ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandFailedException & ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandAbortedException & ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (const lang::IllegalArgumentException &) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (const uno::RuntimeException &) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (...) {
+        excOccurred = ::cppu::getCaughtException();
+        css::deployment::DeploymentException exc(
+            "Extension Manager: exception during enableExtension",
+            static_cast<OWeakObject*>(this), excOccurred);
+        excOccurred <<= exc;
+    }
+
+    if (!excOccurred.hasValue())
+        return;
+
+    try
+    {
+        activateExtension(dp_misc::getIdentifier(extension),
+                          extension->getName(), bUserDisabled, false,
+                          xAbortChannel, xCmdEnv);
+    }
+    catch (...)
+    {
+    }
+    ::cppu::throwException(excOccurred);
+}
+
+sal_Int32 ExtensionManager::checkPrerequisitesAndEnable(
+    Reference<css::deployment::XPackage> const & extension,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    try
+    {
+        if (!extension.is())
+            return 0;
+        ::osl::MutexGuard guard(m_aMutex);
+        sal_Int32 ret = 0;
+        Reference<css::deployment::XPackageManager> mgr =
+            getPackageManager(extension->getRepositoryName());
+        ret = mgr->checkPrerequisites(extension, xAbortChannel, xCmdEnv);
+        if (ret)
+        {
+            //There are some unfulfilled prerequisites, try to revoke
+            extension->revokePackage(false, xAbortChannel, xCmdEnv);
+        }
+        const OUString id(dp_misc::getIdentifier(extension));
+        activateExtension(id, extension->getName(),
+                          isUserDisabled(id, extension->getName()), false,
+                          xAbortChannel, xCmdEnv);
+        return ret;
+    }
+    catch ( const css::deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (...) {
+        uno::Any excOccurred = ::cppu::getCaughtException();
+        css::deployment::DeploymentException exc(
+            "Extension Manager: exception during disableExtension",
+            static_cast<OWeakObject*>(this), excOccurred);
+        throw exc;
+    }
+}
+
+void ExtensionManager::disableExtension(
+    Reference<css::deployment::XPackage> const & extension,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    ::osl::MutexGuard guard(m_aMutex);
+    uno::Any excOccurred;
+    bool bUserDisabled = false;
+    try
+    {
+        if (!extension.is())
+            return;
+        const OUString repository( extension->getRepositoryName());
+        if (repository != "user")
+            throw lang::IllegalArgumentException(
+                "No valid repository name provided.",
+                static_cast<cppu::OWeakObject*>(this), 0);
+
+        const OUString id(dp_misc::getIdentifier(extension));
+        bUserDisabled = isUserDisabled(id, extension->getName());
+
+        activateExtension(id, extension->getName(), true, false,
+                          xAbortChannel, xCmdEnv);
+    }
+    catch ( const css::deployment::DeploymentException& ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandFailedException & ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch ( const ucb::CommandAbortedException & ) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (const lang::IllegalArgumentException &) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (const uno::RuntimeException &) {
+        excOccurred = ::cppu::getCaughtException();
+    } catch (...) {
+        excOccurred = ::cppu::getCaughtException();
+        css::deployment::DeploymentException exc(
+            "Extension Manager: exception during disableExtension",
+            static_cast<OWeakObject*>(this), excOccurred);
+        excOccurred <<= exc;
+    }
+
+    if (!excOccurred.hasValue())
+        return;
+
+    try
+    {
+        activateExtension(dp_misc::getIdentifier(extension),
+                          extension->getName(), bUserDisabled, false,
+                          xAbortChannel, xCmdEnv);
+    }
+    catch (...)
+    {
+    }
+    ::cppu::throwException(excOccurred);
+}
+
+uno::Sequence< Reference<css::deployment::XPackage> >
+    ExtensionManager::getDeployedExtensions(
+    OUString const & repository,
+    Reference<task::XAbortChannel> const &xAbort,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    return getPackageManager(repository)->getDeployedPackages(
+        xAbort, xCmdEnv);
+}
+
+Reference<css::deployment::XPackage>
+    ExtensionManager::getDeployedExtension(
+    OUString const & repository,
+    OUString const & identifier,
+    OUString const & filename,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    return getPackageManager(repository)->getDeployedPackage(
+        identifier, filename, xCmdEnv);
+}
+
+uno::Sequence< uno::Sequence<Reference<css::deployment::XPackage> > >
+    ExtensionManager::getAllExtensions(
+    Reference<task::XAbortChannel> const & xAbort,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    try
+    {
+        id2extensions mapExt;
+
+        uno::Sequence<Reference<css::deployment::XPackage> > userExt =
+            getUserRepository()->getDeployedPackages(xAbort, xCmdEnv);
+        addExtensionsToMap(mapExt, userExt, u"user");
+        uno::Sequence<Reference<css::deployment::XPackage> > sharedExt =
+            getSharedRepository()->getDeployedPackages(xAbort, xCmdEnv);
+        addExtensionsToMap(mapExt, sharedExt, u"shared");
+        uno::Sequence<Reference<css::deployment::XPackage> > bundledExt =
+            getBundledRepository()->getDeployedPackages(xAbort, xCmdEnv);
+        addExtensionsToMap(mapExt, bundledExt, u"bundled");
+
+        // Create the tmp repository to trigger its clean up (deletion
+        // of old temporary data.)
+        getTmpRepository();
+
+        //copy the values of the map to a vector for sorting
+        std::vector< std::vector<Reference<css::deployment::XPackage> > >
+              vecExtensions;
+        for (auto const& elem : mapExt)
+            vecExtensions.push_back(elem.second);
+
+        //sort the element according to the identifier
+        std::sort(vecExtensions.begin(), vecExtensions.end(), CompIdentifiers());
+
+        sal_Int32 j = 0;
+        uno::Sequence< uno::Sequence<Reference<css::deployment::XPackage> > > seqSeq(vecExtensions.size());
+        auto seqSeqRange = asNonConstRange(seqSeq);
+        for (auto const& elem : vecExtensions)
+        {
+            seqSeqRange[j++] = comphelper::containerToSequence(elem);
+        }
+        return seqSeq;
+
+    } catch ( const css::deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (...) {
+        uno::Any exc = ::cppu::getCaughtException();
+        throw css::deployment::DeploymentException(
+            "Extension Manager: exception during enableExtension",
+            static_cast<OWeakObject*>(this), exc);
+   }
+}
+
+// Only to be called from unopkg or soffice bootstrap (with force=true in the
+// latter case):
+void ExtensionManager::reinstallDeployedExtensions(
+    sal_Bool force, OUString const & repository,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    try
+    {
+        Reference<css::deployment::XPackageManager>
+            xPackageManager = getPackageManager(repository);
+
+        std::set< OUString > disabledExts;
+        {
+            const uno::Sequence< Reference<css::deployment::XPackage> > extensions(
+                xPackageManager->getDeployedPackages(xAbortChannel, xCmdEnv));
+            for ( const Reference<css::deployment::XPackage>& package : extensions )
+            {
+                try
+                {
+                    beans::Optional< beans::Ambiguous< sal_Bool > > registered(
+                        package->isRegistered(xAbortChannel, xCmdEnv));
+                    if (registered.IsPresent &&
+                        !(registered.Value.IsAmbiguous ||
+                          registered.Value.Value))
+                    {
+                        const OUString id = dp_misc::getIdentifier(package);
+                        OSL_ASSERT(!id.isEmpty());
+                        disabledExts.insert(id);
+                    }
+                }
+                catch (const lang::DisposedException &)
+                {
+                }
+            }
+        }
+
+        ::osl::MutexGuard guard(m_aMutex);
+        xPackageManager->reinstallDeployedPackages(
+            force, xAbortChannel, xCmdEnv);
+        //We must sync here, otherwise we will get exceptions when extensions
+        //are removed.
+        dp_misc::syncRepositories(force, xCmdEnv);
+        const uno::Sequence< Reference<css::deployment::XPackage> > extensions(
+            xPackageManager->getDeployedPackages(xAbortChannel, xCmdEnv));
+
+        for ( const Reference<css::deployment::XPackage>& package : extensions )
+        {
+            try
+            {
+                const OUString id =  dp_misc::getIdentifier(package);
+                const OUString fileName = package->getName();
+                OSL_ASSERT(!id.isEmpty());
+                activateExtension(
+                    id, fileName, disabledExts.find(id) != disabledExts.end(),
+                    true, xAbortChannel, xCmdEnv );
+            }
+            catch (const lang::DisposedException &)
+            {
+            }
+        }
+    } catch ( const css::deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (...) {
+        uno::Any exc = ::cppu::getCaughtException();
+        throw css::deployment::DeploymentException(
+            "Extension Manager: exception during enableExtension",
+            static_cast<OWeakObject*>(this), exc);
+    }
+}
+
+sal_Bool ExtensionManager::synchronize(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    try
+    {
+        ::osl::MutexGuard guard(m_aMutex);
+        OUString sSynchronizingShared(StrSyncRepository());
+        sSynchronizingShared = sSynchronizingShared.replaceAll("%NAME", "shared");
+        dp_misc::ProgressLevel progressShared(xCmdEnv, sSynchronizingShared);
+        bool bModified = getSharedRepository()->synchronize(xAbortChannel, xCmdEnv);
+        progressShared.update("\n\n");
+
+        OUString sSynchronizingBundled(StrSyncRepository());
+        sSynchronizingBundled = sSynchronizingBundled.replaceAll("%NAME", "bundled");
+        dp_misc::ProgressLevel progressBundled(xCmdEnv, sSynchronizingBundled);
+        bModified |= static_cast<bool>(getBundledRepository()->synchronize(xAbortChannel, xCmdEnv));
+        progressBundled.update("\n\n");
+
+        //Always determine the active extension.
+        //TODO: Is this still necessary?  (It used to be necessary for the
+        // first-start optimization:  The setup created the registration data
+        // for the bundled extensions (share/prereg/bundled) which was copied to
+        // the user installation when a user started OOo for the first time
+        // after running setup.  All bundled extensions were registered at that
+        // moment.  However, extensions with the same identifier could be in the
+        // shared or user repository, in which case the respective bundled
+        // extensions had to be revoked.)
+        try
+        {
+            const uno::Sequence<uno::Sequence<Reference<css::deployment::XPackage> > >
+                seqSeqExt = getAllExtensions(xAbortChannel, xCmdEnv);
+            for (uno::Sequence<Reference<css::deployment::XPackage> > const & seqExt : seqSeqExt)
+            {
+                activateExtension(seqExt, isUserDisabled(seqExt), true,
+                                  xAbortChannel, xCmdEnv);
+            }
+        }
+        catch (...)
+        {
+            //We catch the exception, so we can write the lastmodified file
+            //so we will no repeat this every time OOo starts.
+            OSL_FAIL("Extensions Manager: synchronize");
+        }
+        OUString lastSyncBundled("$BUNDLED_EXTENSIONS_USER/lastsynchronized");
+        writeLastModified(lastSyncBundled, xCmdEnv, m_xContext);
+        OUString lastSyncShared("$SHARED_EXTENSIONS_USER/lastsynchronized");
+        writeLastModified(lastSyncShared, xCmdEnv, m_xContext);
+        return bModified;
+    } catch ( const css::deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (...) {
+        uno::Any exc = ::cppu::getCaughtException();
+        throw css::deployment::DeploymentException(
+            "Extension Manager: exception in synchronize",
+            static_cast<OWeakObject*>(this), exc);
+    }
+}
+
+// Notify the user when a new extension is to be installed. This is only the
+// case when one uses the system integration to install an extension (double
+// clicking on .oxt file etc.)). The function must only be called if there is no
+// extension with the same identifier already deployed. Then the checkUpdate
+// function will inform the user that the extension is about to be installed In
+// case the user cancels the installation a CommandFailed exception is
+// thrown.
+void ExtensionManager::checkInstall(
+    OUString const & displayName,
+    Reference<ucb::XCommandEnvironment> const & cmdEnv)
+{
+        uno::Any request(
+            css::deployment::InstallException(
+                "Extension " + displayName +
+                " is about to be installed.",
+                static_cast<OWeakObject *>(this), displayName));
+        bool approve = false, abort = false;
+        if (! dp_misc::interactContinuation(
+                request, cppu::UnoType<task::XInteractionApprove>::get(),
+                cmdEnv, &approve, &abort ))
+        {
+            OSL_ASSERT( !approve && !abort );
+            throw css::deployment::DeploymentException(
+                DpResId(RID_STR_ERROR_WHILE_ADDING) + displayName,
+                static_cast<OWeakObject *>(this), request );
+        }
+        if (abort || !approve)
+            throw ucb::CommandFailedException(
+                DpResId(RID_STR_ERROR_WHILE_ADDING) + displayName,
+                static_cast<OWeakObject *>(this), request );
+}
+
+/* The function will make the user interaction in case there is an extension
+installed with the same id. This function may only be called if there is already
+an extension.
+*/
+void ExtensionManager::checkUpdate(
+    OUString const & newVersion,
+    OUString const & newDisplayName,
+    Reference<css::deployment::XPackage> const & oldExtension,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    // package already deployed, interact --force:
+    uno::Any request(
+        (css::deployment::VersionException(
+            DpResId(
+                RID_STR_PACKAGE_ALREADY_ADDED ) + newDisplayName,
+            static_cast<OWeakObject *>(this), newVersion, newDisplayName,
+            oldExtension ) ) );
+    bool replace = false, abort = false;
+    if (! dp_misc::interactContinuation(
+            request, cppu::UnoType<task::XInteractionApprove>::get(),
+            xCmdEnv, &replace, &abort )) {
+        OSL_ASSERT( !replace && !abort );
+        throw css::deployment::DeploymentException(
+            DpResId(
+                RID_STR_ERROR_WHILE_ADDING) + newDisplayName,
+            static_cast<OWeakObject *>(this), request );
+    }
+    if (abort || !replace)
+        throw ucb::CommandFailedException(
+            DpResId(
+                RID_STR_PACKAGE_ALREADY_ADDED) + newDisplayName,
+            static_cast<OWeakObject *>(this), request );
+}
+
+uno::Sequence<Reference<css::deployment::XPackage> > SAL_CALL
+ExtensionManager::getExtensionsWithUnacceptedLicenses(
+        OUString const & repository,
+        Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    Reference<css::deployment::XPackageManager>
+        xPackageManager = getPackageManager(repository);
+    ::osl::MutexGuard guard(m_aMutex);
+    return xPackageManager->getExtensionsWithUnacceptedLicenses(xCmdEnv);
+}
+
+sal_Bool ExtensionManager::isReadOnlyRepository(OUString const & repository)
+{
+    return getPackageManager(repository)->isReadOnly();
+}
+
+
+// XModifyBroadcaster
+
+void ExtensionManager::addModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+     check();
+     rBHelper.addListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+
+void ExtensionManager::removeModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+    check();
+    rBHelper.removeListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+void ExtensionManager::check()
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed) {
+        throw lang::DisposedException(
+            "ExtensionManager instance has already been disposed!",
+            static_cast<OWeakObject *>(this) );
+    }
+}
+
+void ExtensionManager::fireModified()
+{
+    ::cppu::OInterfaceContainerHelper * pContainer = rBHelper.getContainer(
+        cppu::UnoType<util::XModifyListener>::get() );
+    if (pContainer != nullptr) {
+        pContainer->forEach<util::XModifyListener>(
+            [this] (uno::Reference<util::XModifyListener> const& xListener)
+                { return xListener->modified(lang::EventObject(static_cast<OWeakObject *>(this))); });
+    }
+}
+
+} // namespace dp_manager
+
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_ExtensionManager_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& )
+{
+    return cppu::acquire(new dp_manager::ExtensionManager(context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_extensionmanager.hxx b/desktop/source/deployment/manager/dp_extensionmanager.hxx
new file mode 100644
index 000000000..0e08314c3
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_extensionmanager.hxx
@@ -0,0 +1,227 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <strings.hrc>
+#include <dp_shared.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <com/sun/star/deployment/XExtensionManager.hpp>
+#include <com/sun/star/deployment/XPackageManager.hpp>
+#include <com/sun/star/deployment/XPackageManagerFactory.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <osl/mutex.hxx>
+#include <vector>
+#include <unordered_map>
+
+namespace dp_manager {
+
+typedef std::unordered_map<
+    OUString,
+    std::vector<css::uno::Reference<css::deployment::XPackage> > > id2extensions;
+
+class ExtensionManager : private cppu::BaseMutex,
+        public ::cppu::WeakComponentImplHelper< css::deployment::XExtensionManager, css::lang::XServiceInfo >
+{
+public:
+    explicit ExtensionManager( css::uno::Reference< css::uno::XComponentContext >const& xContext);
+    virtual     ~ExtensionManager() override;
+
+    void check();
+    void fireModified();
+
+public:
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+//    XModifyBroadcaster
+    virtual void SAL_CALL addModifyListener(
+       css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+    virtual void SAL_CALL removeModifyListener(
+       css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+
+//XExtensionManager
+    virtual css::uno::Sequence<
+        css::uno::Reference<css::deployment::XPackageTypeInfo> > SAL_CALL
+        getSupportedPackageTypes() override;
+
+    virtual css::uno::Reference<css::task::XAbortChannel> SAL_CALL
+    createAbortChannel() override;
+
+    virtual css::uno::Reference<css::deployment::XPackage> SAL_CALL addExtension(
+        OUString const & url,
+        css::uno::Sequence<css::beans::NamedValue> const & properties,
+        OUString const & repository,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL removeExtension(
+        OUString const & identifier,
+        OUString const & filename,
+        OUString const & repository,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL enableExtension(
+        css::uno::Reference<css::deployment::XPackage> const & extension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL disableExtension(
+        css::uno::Reference<css::deployment::XPackage> const & extension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual sal_Int32 SAL_CALL checkPrerequisitesAndEnable(
+        css::uno::Reference<css::deployment::XPackage> const & extension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Sequence< css::uno::Reference<css::deployment::XPackage> >
+        SAL_CALL getDeployedExtensions(
+        OUString const & repository,
+        css::uno::Reference<css::task::XAbortChannel> const &,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Reference< css::deployment::XPackage>
+        SAL_CALL getDeployedExtension(
+        OUString const & repository,
+        OUString const & identifier,
+        OUString const & filename,
+        css::uno::Reference< css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> >
+    SAL_CALL getExtensionsWithSameIdentifier(
+        OUString const & identifier,
+        OUString const & filename,
+        css::uno::Reference< css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Sequence< css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > >
+        SAL_CALL getAllExtensions(
+        css::uno::Reference<css::task::XAbortChannel> const &,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL reinstallDeployedExtensions(
+        sal_Bool force, OUString const & repository,
+        css::uno::Reference< css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference< css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual sal_Bool SAL_CALL synchronize(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > SAL_CALL
+    getExtensionsWithUnacceptedLicenses(
+        OUString const & repository,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv) override;
+
+    virtual sal_Bool SAL_CALL isReadOnlyRepository(OUString const & repository) override;
+
+private:
+
+    static OUString StrSyncRepository() { return DpResId(RID_STR_SYNCHRONIZING_REPOSITORY); }
+
+    css::uno::Reference< css::uno::XComponentContext> m_xContext;
+    css::uno::Reference<css::deployment::XPackageManagerFactory> m_xPackageManagerFactory;
+
+    //only to be used within addExtension
+    ::osl::Mutex m_addMutex;
+    /* contains the names of all repositories (except tmp) in order of there
+       priority. That is, the first element is "user" followed by "shared" and
+       then "bundled"
+     */
+    std::vector< OUString > m_repositoryNames;
+
+    css::uno::Reference<css::deployment::XPackageManager> getUserRepository();
+    css::uno::Reference<css::deployment::XPackageManager> getSharedRepository();
+    css::uno::Reference<css::deployment::XPackageManager> getBundledRepository();
+    css::uno::Reference<css::deployment::XPackageManager> getTmpRepository();
+    css::uno::Reference<css::deployment::XPackageManager> getBakRepository();
+
+    bool isUserDisabled(OUString const & identifier,
+                        OUString const & filename);
+
+    static bool isUserDisabled(
+        css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > const & seqExtSameId);
+
+    void activateExtension(
+        OUString const & identifier,
+        OUString const & fileName,
+        bool bUserDisabled, bool bStartup,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+
+    static void activateExtension(
+        css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > const & seqExt,
+        bool bUserDisabled, bool bStartup,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv );
+
+    std::vector<css::uno::Reference<css::deployment::XPackage> >
+    getExtensionsWithSameId(OUString  const & identifier,
+                            OUString const & fileName);
+
+    css::uno::Reference<css::deployment::XPackage> backupExtension(
+        OUString const & identifier, OUString const & fileName,
+        css::uno::Reference<css::deployment::XPackageManager> const & xPackageManager,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+
+    void checkInstall(
+        OUString const & displayName,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & cmdEnv);
+
+    void checkUpdate(
+        OUString const & newVersion,
+        OUString const & newDisplayName,
+        css::uno::Reference<css::deployment::XPackage> const & oldExtension,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+
+    void addExtensionsToMap(
+        id2extensions & mapExt,
+        css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > const & seqExt,
+        std::u16string_view repository);
+
+    /// @throws css::lang::IllegalArgumentException
+    /// @throws css::uno::RuntimeException
+    css::uno::Reference<css::deployment::XPackageManager>
+    getPackageManager(std::u16string_view repository);
+
+    /// @throws css::deployment::DeploymentException
+    /// @throws css::ucb::CommandFailedException
+    /// @throws css::ucb::CommandAbortedException
+    /// @throws css::lang::IllegalArgumentException
+    /// @throws css::uno::RuntimeException
+    bool doChecksForAddExtension(
+        css::uno::Reference<css::deployment::XPackageManager> const & xPackageMgr,
+        css::uno::Sequence<css::beans::NamedValue> const & properties,
+        css::uno::Reference<css::deployment::XPackage> const & xTmpExtension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+        css::uno::Reference<css::deployment::XPackage> & out_existingExtension );
+
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_informationprovider.cxx b/desktop/source/deployment/manager/dp_informationprovider.cxx
new file mode 100644
index 000000000..1e7beea34
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_informationprovider.cxx
@@ -0,0 +1,338 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <com/sun/star/deployment/UpdateInformationProvider.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/deployment/XPackageInformationProvider.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/deployment/XUpdateInformationProvider.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/task/XAbortChannel.hpp>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/xml/dom/XElement.hpp>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <osl/diagnose.h>
+#include <rtl/ustring.hxx>
+#include <tools/diagnose_ex.h>
+#include <ucbhelper/content.hxx>
+
+#include <dp_dependencies.hxx>
+#include <dp_descriptioninfoset.hxx>
+#include <dp_identifier.hxx>
+#include <dp_version.hxx>
+#include <dp_update.hxx>
+
+namespace beans      = com::sun::star::beans ;
+namespace deployment = com::sun::star::deployment ;
+namespace lang       = com::sun::star::lang ;
+namespace task       = com::sun::star::task ;
+namespace css_ucb    = com::sun::star::ucb ;
+namespace uno        = com::sun::star::uno ;
+namespace xml = com::sun::star::xml ;
+
+
+namespace dp_info {
+
+namespace {
+
+class PackageInformationProvider :
+        public ::cppu::WeakImplHelper< deployment::XPackageInformationProvider, lang::XServiceInfo >
+
+{
+    public:
+    explicit PackageInformationProvider( uno::Reference< uno::XComponentContext >const& xContext);
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageInformationProvider
+    virtual OUString SAL_CALL getPackageLocation( const OUString& extensionId ) override;
+    virtual uno::Sequence< uno::Sequence< OUString > > SAL_CALL isUpdateAvailable( const OUString& extensionId ) override;
+    virtual uno::Sequence< uno::Sequence< OUString > > SAL_CALL getExtensionList() override;
+
+private:
+
+    uno::Reference< uno::XComponentContext> mxContext;
+
+    OUString getPackageLocation( const OUString& repository,
+                                      std::u16string_view _sExtensionId );
+
+    uno::Reference< deployment::XUpdateInformationProvider > mxUpdateInformation;
+};
+
+}
+
+PackageInformationProvider::PackageInformationProvider( uno::Reference< uno::XComponentContext > const& xContext) :
+    mxContext( xContext ),
+    mxUpdateInformation( deployment::UpdateInformationProvider::create( xContext ) )
+{
+}
+
+// XServiceInfo
+OUString PackageInformationProvider::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.PackageInformationProvider";
+}
+
+sal_Bool PackageInformationProvider::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > PackageInformationProvider::getSupportedServiceNames()
+{
+    // a private one:
+    return { "com.sun.star.comp.deployment.PackageInformationProvider" };
+}
+
+OUString PackageInformationProvider::getPackageLocation(
+    const OUString & repository,
+    std::u16string_view _rExtensionId )
+{
+    OUString aLocationURL;
+    uno::Reference<deployment::XExtensionManager> xManager =
+        deployment::ExtensionManager::get(mxContext);
+
+    if ( xManager.is() )
+    {
+        const uno::Sequence< uno::Reference< deployment::XPackage > > packages(
+                xManager->getDeployedExtensions(
+                    repository,
+                    uno::Reference< task::XAbortChannel >(),
+                    uno::Reference< css_ucb::XCommandEnvironment > () ) );
+
+        for ( int pos = packages.getLength(); pos--; )
+        {
+            try
+            {
+                const beans::Optional< OUString > aID = packages[ pos ]->getIdentifier();
+                if ( aID.IsPresent && (aID.Value == _rExtensionId ) )
+                {
+                    aLocationURL = packages[ pos ]->getURL();
+                    break;
+                }
+            }
+            catch ( uno::RuntimeException & ) {}
+        }
+    }
+
+    return aLocationURL;
+}
+
+
+OUString SAL_CALL
+PackageInformationProvider::getPackageLocation( const OUString& _sExtensionId )
+{
+    OUString aLocationURL = getPackageLocation( "user", _sExtensionId );
+
+    if ( aLocationURL.isEmpty() )
+    {
+        aLocationURL = getPackageLocation( "shared", _sExtensionId );
+    }
+    if ( aLocationURL.isEmpty() )
+    {
+        aLocationURL = getPackageLocation( "bundled", _sExtensionId );
+    }
+    if ( !aLocationURL.isEmpty() )
+    {
+        try
+        {
+            ::ucbhelper::Content aContent( aLocationURL, nullptr, mxContext );
+            aLocationURL = aContent.getURL();
+        }
+        catch (const css::ucb::ContentCreationException&)
+        {
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "ignoring");
+        }
+    }
+    return aLocationURL;
+}
+
+uno::Sequence< uno::Sequence< OUString > > SAL_CALL
+PackageInformationProvider::isUpdateAvailable( const OUString& _sExtensionId )
+{
+    uno::Sequence< uno::Sequence< OUString > > aList;
+
+    uno::Reference<deployment::XExtensionManager> extMgr =
+        deployment::ExtensionManager::get(mxContext);
+
+    if (!extMgr.is())
+    {
+        OSL_ASSERT(false);
+        return aList;
+    }
+    std::vector<std::pair<uno::Reference<deployment::XPackage>, uno::Any > > errors;
+    dp_misc::UpdateInfoMap updateInfoMap;
+    if (!_sExtensionId.isEmpty())
+    {
+        std::vector<uno::Reference<deployment::XPackage> > vecExtensions;
+        uno::Reference<deployment::XPackage> extension;
+        try
+        {
+            extension = dp_misc::getExtensionWithHighestVersion(
+                extMgr->getExtensionsWithSameIdentifier(
+                    _sExtensionId, _sExtensionId, uno::Reference<css_ucb::XCommandEnvironment>()));
+            vecExtensions.push_back(extension);
+        }
+        catch (lang::IllegalArgumentException &)
+        {
+            OSL_ASSERT(false);
+        }
+        updateInfoMap = dp_misc::getOnlineUpdateInfos(
+            mxContext, extMgr, mxUpdateInformation, &vecExtensions, errors);
+    }
+    else
+    {
+        updateInfoMap = dp_misc::getOnlineUpdateInfos(
+            mxContext, extMgr, mxUpdateInformation, nullptr, errors);
+    }
+
+    int nCount = 0;
+    for (auto const& updateInfo : updateInfoMap)
+    {
+        dp_misc::UpdateInfo const & info = updateInfo.second;
+
+        OUString sOnlineVersion;
+        if (info.info.is())
+        {
+            // check, if there are unsatisfied dependencies and ignore this online update
+            dp_misc::DescriptionInfoset infoset(mxContext, info.info);
+            uno::Sequence< uno::Reference< xml::dom::XElement > >
+                ds( dp_misc::Dependencies::check( infoset ) );
+            if ( ! ds.hasElements() )
+                sOnlineVersion = info.version;
+        }
+
+        OUString sVersionUser;
+        OUString sVersionShared;
+        OUString sVersionBundled;
+        uno::Sequence< uno::Reference< deployment::XPackage> > extensions;
+        try {
+            extensions = extMgr->getExtensionsWithSameIdentifier(
+                dp_misc::getIdentifier(info.extension), info.extension->getName(),
+                uno::Reference<css_ucb::XCommandEnvironment>());
+        } catch (const lang::IllegalArgumentException&) {
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "ignoring");
+            continue;
+        }
+        OSL_ASSERT(extensions.getLength() == 3);
+        if (extensions[0].is() )
+            sVersionUser = extensions[0]->getVersion();
+        if (extensions[1].is() )
+            sVersionShared = extensions[1]->getVersion();
+        if (extensions[2].is() )
+            sVersionBundled = extensions[2]->getVersion();
+
+        bool bSharedReadOnly = extMgr->isReadOnlyRepository("shared");
+
+        dp_misc::UPDATE_SOURCE sourceUser = dp_misc::isUpdateUserExtension(
+            bSharedReadOnly, sVersionUser, sVersionShared, sVersionBundled, sOnlineVersion);
+        dp_misc::UPDATE_SOURCE sourceShared = dp_misc::isUpdateSharedExtension(
+            bSharedReadOnly, sVersionShared, sVersionBundled, sOnlineVersion);
+
+        OUString updateVersionUser;
+        OUString updateVersionShared;
+        if (sourceUser != dp_misc::UPDATE_SOURCE_NONE)
+            updateVersionUser = dp_misc::getHighestVersion(
+                sVersionShared, sVersionBundled, sOnlineVersion);
+        if (sourceShared  != dp_misc::UPDATE_SOURCE_NONE)
+            updateVersionShared = dp_misc::getHighestVersion(
+                OUString(), sVersionBundled, sOnlineVersion);
+        OUString updateVersion;
+        if (dp_misc::compareVersions(updateVersionUser, updateVersionShared) == dp_misc::GREATER)
+            updateVersion = updateVersionUser;
+        else
+            updateVersion = updateVersionShared;
+        if (!updateVersion.isEmpty())
+        {
+
+            OUString aNewEntry[2];
+            aNewEntry[0] = updateInfo.first;
+            aNewEntry[1] = updateVersion;
+            aList.realloc( ++nCount );
+            aList.getArray()[ nCount-1 ] = ::uno::Sequence< OUString >( aNewEntry, 2 );
+        }
+    }
+    return aList;
+}
+
+
+uno::Sequence< uno::Sequence< OUString > > SAL_CALL PackageInformationProvider::getExtensionList()
+{
+    const uno::Reference<deployment::XExtensionManager> mgr =
+        deployment::ExtensionManager::get(mxContext);
+
+    if (!mgr.is())
+        return uno::Sequence< uno::Sequence< OUString > >();
+
+    const uno::Sequence< uno::Sequence< uno::Reference<deployment::XPackage > > >
+        allExt =  mgr->getAllExtensions(
+            uno::Reference< task::XAbortChannel >(),
+            uno::Reference< css_ucb::XCommandEnvironment > () );
+
+    uno::Sequence< uno::Sequence< OUString > > retList;
+
+    sal_Int32 cAllIds = allExt.getLength();
+    retList.realloc(cAllIds);
+    auto pretList = retList.getArray();
+
+    for (sal_Int32 i = 0; i < cAllIds; i++)
+    {
+        //The inner sequence contains extensions with the same identifier from
+        //all the different repositories, that is user, share, bundled.
+        const uno::Sequence< uno::Reference< deployment::XPackage > > &
+            seqExtension = allExt[i];
+        sal_Int32 cExt = seqExtension.getLength();
+        OSL_ASSERT(cExt == 3);
+        for (sal_Int32 j = 0; j < cExt; j++)
+        {
+            //ToDo according to the old code the first found extension is used
+            //even if another one with the same id has a better version.
+            uno::Reference< deployment::XPackage > const & xExtension( seqExtension[j] );
+            if (xExtension.is())
+            {
+                pretList[i] = { dp_misc::getIdentifier(xExtension), xExtension->getVersion() };
+                break;
+            }
+        }
+    }
+    return retList;
+}
+
+
+} // namespace dp_info
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_PackageInformationProvider_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& )
+{
+    return cppu::acquire(new dp_info::PackageInformationProvider(context));
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_manager.cxx b/desktop/source/deployment/manager/dp_manager.cxx
new file mode 100644
index 000000000..68765a63f
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_manager.cxx
@@ -0,0 +1,1600 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_features.h>
+
+#include <dp_interact.h>
+#include <dp_misc.h>
+#include <dp_registry.hxx>
+#include <dp_shared.hxx>
+#include <strings.hrc>
+#include <dp_ucb.h>
+#include <dp_platform.hxx>
+#include "dp_manager.h"
+#include <dp_identifier.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/string.hxx>
+#include <rtl/uri.hxx>
+#include <rtl/bootstrap.hxx>
+#include <sal/log.hxx>
+#include <tools/urlobj.hxx>
+#include <tools/diagnose_ex.h>
+#include <osl/diagnose.h>
+#include <osl/file.hxx>
+#include <osl/security.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <comphelper/logging.hxx>
+#include <comphelper/sequence.hxx>
+#include <utility>
+#include <xmlscript/xml_helper.hxx>
+#include <svl/inettype.hxx>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/beans/UnknownPropertyException.hpp>
+#include <com/sun/star/logging/LogLevel.hpp>
+#include <com/sun/star/logging/FileHandler.hpp>
+#include <com/sun/star/logging/SimpleTextFormatter.hpp>
+#include <com/sun/star/logging/XLogger.hpp>
+#include <com/sun/star/util/XUpdatable.hpp>
+#include <com/sun/star/sdbc/XResultSet.hpp>
+#include <com/sun/star/sdbc/XRow.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <com/sun/star/ucb/XContentAccess.hpp>
+#include <com/sun/star/ucb/NameClash.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/InvalidRemovedParameterException.hpp>
+#include <com/sun/star/deployment/Prerequisites.hpp>
+#include <com/sun/star/ucb/UnsupportedCommandException.hpp>
+#include <unotools/tempfile.hxx>
+
+#include <dp_descriptioninfoset.hxx>
+#include "dp_commandenvironments.hxx"
+#include "dp_properties.hxx"
+
+#include <vector>
+#include <algorithm>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+using namespace ::com::sun::star::logging;
+
+
+namespace dp_manager {
+
+namespace {
+
+struct MatchTempDir
+{
+    OUString m_str;
+    explicit MatchTempDir( OUString str ) : m_str(std::move( str )) {}
+    bool operator () ( ActivePackages::Entries::value_type const & v ) const {
+        return v.second.temporaryName.equalsIgnoreAsciiCase( m_str );
+    }
+};
+
+OUString getExtensionFolder(OUString const &  parentFolder,
+                            Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+                            Reference<uno::XComponentContext> const & xContext)
+{
+    ::ucbhelper::Content tempFolder( parentFolder, xCmdEnv, xContext );
+    Reference<sdbc::XResultSet> xResultSet(
+                StrTitle::createCursor (tempFolder, ::ucbhelper::INCLUDE_FOLDERS_ONLY ) );
+
+    OUString title;
+    if (xResultSet->next())
+    {
+        title = Reference<sdbc::XRow>(
+            xResultSet, UNO_QUERY_THROW )->getString(1 /* Title */ ) ;
+    }
+    return title;
+}
+}
+
+void PackageManagerImpl::initActivationLayer(
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (m_activePackages.isEmpty())
+    {
+        OSL_ASSERT( m_registryCache.isEmpty() );
+        // documents temp activation:
+        m_activePackagesDB.reset( new ActivePackages );
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, m_context, xCmdEnv,
+                                false /* no throw */ ))
+        {
+            // scan for all entries in m_packagesDir:
+            Reference<sdbc::XResultSet> xResultSet(
+                        StrTitle::createCursor (ucbContent, ::ucbhelper::INCLUDE_FOLDERS_AND_DOCUMENTS ) );
+
+            while (xResultSet->next())
+            {
+                Reference<sdbc::XRow> xRow( xResultSet, UNO_QUERY_THROW );
+                OUString title( xRow->getString( 1 /* Title */ ) );
+                // xxx todo: remove workaround for tdoc
+                if ( title == "this_is_a_dummy_stream_just_there_as_a_workaround_for_a_temporary_limitation_of_the_storage_api_implementation" )
+                    continue;
+                if ( title == "META-INF" )
+                    continue;
+
+                ::ucbhelper::Content sourceContent(
+                    Reference<XContentAccess>(
+                        xResultSet, UNO_QUERY_THROW )->queryContent(),
+                    xCmdEnv, m_xComponentContext );
+
+                OUString mediaType( detectMediaType( sourceContent,
+                                                     false /* no throw */) );
+                if (!mediaType.isEmpty())
+                {
+                    ActivePackages::Data dbData;
+                    insertToActivationLayer(
+                        Sequence<css::beans::NamedValue>(),mediaType, sourceContent,
+                        title, &dbData );
+
+                    insertToActivationLayerDB( title, dbData );
+                        //TODO #i73136#: insertToActivationLayerDB needs id not
+                        // title, but the whole m_activePackages.getLength()==0
+                        // case (i.e., document-relative deployment) currently
+                        // does not work, anyway.
+                }
+            }
+        }
+    }
+    else
+    {
+        // user|share:
+        OSL_ASSERT( !m_activePackages.isEmpty() );
+        m_activePackages_expanded = expandUnoRcUrl( m_activePackages );
+        m_registrationData_expanded = expandUnoRcUrl(m_registrationData);
+        if (!m_readOnly)
+            create_folder( nullptr, m_activePackages_expanded, xCmdEnv);
+
+        OUString dbName;
+        if (m_context == "user")
+            dbName = m_activePackages_expanded + ".pmap";
+        else
+        {
+            // Create the extension data base in the user installation
+            create_folder( nullptr, m_registrationData_expanded, xCmdEnv);
+            dbName = m_registrationData_expanded + "/extensions.pmap";
+        }
+        // The data base can always be written because it is always in the user installation
+        m_activePackagesDB.reset( new ActivePackages( dbName ) );
+
+        if (! m_readOnly && m_context != "bundled")
+        {
+            // clean up activation layer, scan for zombie temp dirs:
+            ActivePackages::Entries id2temp( m_activePackagesDB->getEntries() );
+
+            ::ucbhelper::Content tempFolder( m_activePackages_expanded, xCmdEnv, m_xComponentContext );
+            Reference<sdbc::XResultSet> xResultSet(
+                StrTitle::createCursor (tempFolder,
+                                         ::ucbhelper::INCLUDE_DOCUMENTS_ONLY ) );
+
+            // get all temp directories:
+            std::vector<OUString> tempEntries;
+            std::vector<OUString> removedEntries;
+            while (xResultSet->next())
+            {
+                OUString title(
+                    Reference<sdbc::XRow>(
+                        xResultSet, UNO_QUERY_THROW )->getString(
+                            1 /* Title */ ) );
+                if (title.endsWith("removed", &title))
+                {
+                    //save the file name without the "removed" part
+                    removedEntries.push_back(::rtl::Uri::encode(
+                                                title, rtl_UriCharClassPchar,
+                                                rtl_UriEncodeIgnoreEscapes,
+                                                RTL_TEXTENCODING_UTF8 ) );
+                }
+                else
+                {
+                    tempEntries.push_back( ::rtl::Uri::encode(
+                                               title, rtl_UriCharClassPchar,
+                                               rtl_UriEncodeIgnoreEscapes,
+                                               RTL_TEXTENCODING_UTF8 ) );
+                }
+            }
+
+            bool bShared = (m_context == "shared");
+            for (const OUString & tempEntry : tempEntries)
+            {
+                const MatchTempDir match( tempEntry );
+                if (std::none_of( id2temp.begin(), id2temp.end(), match ))
+                {
+                    const OUString url(
+                        makeURL(m_activePackages_expanded, tempEntry ) );
+
+                    //In case of shared extensions, new entries are regarded as
+                    //added extensions if there is no xxx.tmpremoved file.
+                    if (bShared)
+                    {
+                        if (std::find(removedEntries.begin(), removedEntries.end(), tempEntry) ==
+                            removedEntries.end())
+                        {
+                            continue;
+                        }
+                        else
+                        {
+                            //Make sure only the same user removes the extension, who
+                            //previously unregistered it. This is avoid races if multiple instances
+                            //of OOo are running which all have write access to the shared installation.
+                            //For example, a user removes the extension, but keeps OOo
+                            //running. Parts of the extension may still be loaded and used by OOo.
+                            //Therefore the extension is only deleted the next time the extension manager is
+                            //run after restarting OOo. While OOo is still running, another user starts OOo
+                            //which would deleted the extension files. If the same user starts another
+                            //instance of OOo then the lock file will prevent this.
+                            OUString aUserName;
+                            ::osl::Security aSecurity;
+                            aSecurity.getUserName( aUserName );
+                            ucbhelper::Content remFileContent(
+                                url + "removed", Reference<XCommandEnvironment>(), m_xComponentContext);
+                            std::vector<sal_Int8> data = dp_misc::readFile(remFileContent);
+                            OString osData(reinterpret_cast<const char*>(data.data()),
+                                                  data.size());
+                            OUString sData = OStringToOUString(
+                                osData, RTL_TEXTENCODING_UTF8);
+                            if (sData != aUserName)
+                                continue;
+                        }
+                    }
+                    // temp entry not needed anymore:
+                    erase_path( url + "_",
+                                Reference<XCommandEnvironment>(),
+                                false /* no throw: ignore errors */ );
+                    erase_path( url, Reference<XCommandEnvironment>(),
+                                false /* no throw: ignore errors */ );
+                    //delete the xxx.tmpremoved file
+                    erase_path(url + "removed",
+                               Reference<XCommandEnvironment>(), false);
+                }
+            }
+        }
+    }
+}
+
+
+void PackageManagerImpl::initRegistryBackends()
+{
+    if (!m_registryCache.isEmpty())
+        create_folder( nullptr, m_registryCache,
+                       Reference<XCommandEnvironment>(), false);
+    m_xRegistry.set( ::dp_registry::create(
+                         m_context, m_registryCache,
+                         m_xComponentContext ) );
+}
+
+namespace {
+
+osl::FileBase::RC createDirectory(OUString const & url) {
+    auto e = osl::Directory::create(url);
+    if (e != osl::FileBase::E_NOENT) {
+        return e;
+    }
+    INetURLObject o(url);
+    if (!o.removeSegment()) {
+        return osl::FileBase::E_INVAL; // anything but E_None/E_EXIST
+    }
+    e = createDirectory(o.GetMainURL(INetURLObject::DecodeMechanism::NONE));
+    if (e != osl::FileBase::E_None && e != osl::FileBase::E_EXIST) {
+        return e;
+    }
+    return osl::Directory::create(url);
+}
+
+bool isMacroURLReadOnly( const OUString &rMacro )
+{
+    OUString aDirURL( rMacro );
+    ::rtl::Bootstrap::expandMacros( aDirURL );
+
+    ::osl::FileBase::RC aErr = createDirectory( aDirURL );
+    if ( aErr == ::osl::FileBase::E_None )
+        return false; // it will be writeable
+    if ( aErr != ::osl::FileBase::E_EXIST )
+        return true; // some serious problem creating it
+
+    bool bError;
+    sal_uInt64 nWritten = 0;
+    OUString aFileURL( aDirURL + "/stamp.sys" );
+    ::osl::File aFile( aFileURL );
+
+    bError = aFile.open( osl_File_OpenFlag_Read |
+                         osl_File_OpenFlag_Write |
+                         osl_File_OpenFlag_Create ) != ::osl::FileBase::E_None;
+    if (!bError)
+        bError = aFile.write( "1", 1, nWritten ) != ::osl::FileBase::E_None;
+    if (aFile.close() != ::osl::FileBase::E_None)
+        bError = true;
+    if (osl::File::remove( aFileURL ) != ::osl::FileBase::E_None)
+        bError = true;
+
+    SAL_INFO(
+        "desktop.deployment",
+        "local url '" << rMacro << "' -> '" << aFileURL << "' "
+            << (bError ? "is" : "is not") << " readonly\n");
+    return bError;
+}
+
+}
+
+Reference<deployment::XPackageManager> PackageManagerImpl::create(
+    Reference<XComponentContext> const & xComponentContext,
+    OUString const & context )
+{
+    rtl::Reference<PackageManagerImpl> that = new PackageManagerImpl(
+        xComponentContext, context );
+
+    OUString logFile, stamp;
+    if ( context == "user" ) {
+        that->m_activePackages = "vnd.sun.star.expand:$UNO_USER_PACKAGES_CACHE/uno_packages";
+        that->m_registrationData = "vnd.sun.star.expand:$UNO_USER_PACKAGES_CACHE";
+        that->m_registryCache = "vnd.sun.star.expand:$UNO_USER_PACKAGES_CACHE/registry";
+        logFile = "$UNO_USER_PACKAGES_CACHE/log.txt";
+        //We use the extension .sys for the file because on Windows Vista a sys
+        //(as well as exe and dll) file
+        //will not be written in the VirtualStore. For example if the process has no
+        //admin right once cannot write to the %programfiles% folder. However, when
+        //virtualization is used, the file will be written into the VirtualStore and
+        //it appears as if one could write to %programfiles%. When we test for write
+        //access to the office/shared folder for shared extensions then this typically
+        //fails because a normal user typically cannot write to this folder. However,
+        //using virtualization it appears that he/she can. Then a shared extension can
+        //be installed but is only visible for the user (because the extension is in
+        //the virtual store).
+        stamp = "$UNO_USER_PACKAGES_CACHE";
+    }
+    else if ( context == "shared" ) {
+        that->m_activePackages = "vnd.sun.star.expand:$UNO_SHARED_PACKAGES_CACHE/uno_packages";
+        that->m_registrationData = "vnd.sun.star.expand:$SHARED_EXTENSIONS_USER";
+        that->m_registryCache = "vnd.sun.star.expand:$SHARED_EXTENSIONS_USER/registry";
+        logFile = "$SHARED_EXTENSIONS_USER/log.txt";
+#if !HAVE_FEATURE_READONLY_INSTALLSET
+        // The "shared" extensions are read-only when we have a
+        // read-only installset.
+        stamp = "$UNO_SHARED_PACKAGES_CACHE";
+#endif
+    }
+    else if ( context == "bundled" ) {
+        that->m_activePackages = "vnd.sun.star.expand:$BUNDLED_EXTENSIONS";
+        that->m_registrationData = "vnd.sun.star.expand:$BUNDLED_EXTENSIONS_USER";
+        that->m_registryCache = "vnd.sun.star.expand:$BUNDLED_EXTENSIONS_USER/registry";
+        logFile = "$BUNDLED_EXTENSIONS_USER/log.txt";
+        //No stamp file. We assume that bundled is always readonly. It must not be
+        //modified from ExtensionManager but only by the installer
+    }
+    else if ( context == "tmp" ) {
+        that->m_activePackages = "vnd.sun.star.expand:$TMP_EXTENSIONS/extensions";
+        that->m_registrationData = "vnd.sun.star.expand:$TMP_EXTENSIONS";
+        that->m_registryCache = "vnd.sun.star.expand:$TMP_EXTENSIONS/registry";
+        stamp = "$TMP_EXTENSIONS";
+    }
+    else if (context == "bak") {
+        that->m_activePackages = "vnd.sun.star.expand:$BAK_EXTENSIONS/extensions";
+        that->m_registrationData = "vnd.sun.star.expand:$BAK_EXTENSIONS";
+        that->m_registryCache = "vnd.sun.star.expand:$BAK_EXTENSIONS/registry";
+        stamp = "$BAK_EXTENSIONS";
+    }
+
+    else if (! context.match("vnd.sun.star.tdoc:/")) {
+        throw lang::IllegalArgumentException(
+            "invalid context given: " + context,
+            Reference<XInterface>(), static_cast<sal_Int16>(-1) );
+    }
+
+    Reference<XCommandEnvironment> xCmdEnv;
+
+    try {
+        // There is no stamp for the bundled folder:
+        if (!stamp.isEmpty())
+            that->m_readOnly = isMacroURLReadOnly( stamp );
+
+        if (!that->m_readOnly && !logFile.isEmpty())
+        {
+            // Initialize logger which will be used in ProgressLogImpl (created below)
+            rtl::Bootstrap::expandMacros(logFile);
+            comphelper::EventLogger logger(xComponentContext, "unopkg");
+            const Reference<XLogger> xLogger(logger.getLogger());
+            Reference<XLogFormatter> xLogFormatter(SimpleTextFormatter::create(xComponentContext));
+            Sequence < beans::NamedValue > aSeq2 { { "Formatter", Any(xLogFormatter) }, {"FileURL", Any(logFile)} };
+            Reference<XLogHandler> xFileHandler(css::logging::FileHandler::createWithSettings(xComponentContext, aSeq2));
+            xFileHandler->setLevel(LogLevel::WARNING);
+            xLogger->addLogHandler(xFileHandler);
+
+            that->m_xLogFile.set(
+                that->m_xComponentContext->getServiceManager()
+                ->createInstanceWithArgumentsAndContext(
+                    "com.sun.star.comp.deployment.ProgressLog",
+                    Sequence<Any>(),
+                    that->m_xComponentContext ),
+                UNO_QUERY_THROW );
+            xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv, that->m_xLogFile ) );
+        }
+
+        that->initRegistryBackends();
+        that->initActivationLayer( xCmdEnv );
+
+        return that;
+
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception & e) {
+        Any exc( ::cppu::getCaughtException() );
+        throw lang::WrappedTargetRuntimeException(
+            ("[context=\"" + context + "\"] caught unexpected "
+             + exc.getValueType().getTypeName() + ": " + e.Message),
+            Reference<XInterface>(), exc );
+    }
+}
+
+
+PackageManagerImpl::~PackageManagerImpl()
+{
+}
+
+
+void PackageManagerImpl::fireModified()
+{
+    ::cppu::OInterfaceContainerHelper * pContainer = rBHelper.getContainer(
+        cppu::UnoType<util::XModifyListener>::get() );
+    if (pContainer != nullptr) {
+        pContainer->forEach<util::XModifyListener>(
+            [this] (uno::Reference<util::XModifyListener> const& xListener)
+                { return xListener->modified(lang::EventObject(static_cast<OWeakObject *>(this))); });
+    }
+}
+
+
+void PackageManagerImpl::disposing()
+{
+    try {
+//     // xxx todo: guarding?
+//     ::osl::MutexGuard guard( getMutex() );
+        try_dispose( m_xLogFile );
+        m_xLogFile.clear();
+        try_dispose( m_xRegistry );
+        m_xRegistry.clear();
+        m_activePackagesDB.reset();
+        m_xComponentContext.clear();
+
+        t_pm_helper::disposing();
+
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        throw lang::WrappedTargetRuntimeException(
+            "caught unexpected exception while disposing...",
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+// XComponent
+
+void PackageManagerImpl::dispose()
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::dispose();
+}
+
+
+void PackageManagerImpl::addEventListener(
+    Reference<lang::XEventListener> const & xListener )
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::addEventListener( xListener );
+}
+
+
+void PackageManagerImpl::removeEventListener(
+    Reference<lang::XEventListener> const & xListener )
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::removeEventListener( xListener );
+}
+
+// XPackageManager
+
+OUString PackageManagerImpl::getContext()
+{
+    check();
+    return m_context;
+}
+
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+PackageManagerImpl::getSupportedPackageTypes()
+{
+    OSL_ASSERT( m_xRegistry.is() );
+    return m_xRegistry->getSupportedPackageTypes();
+}
+
+
+Reference<task::XAbortChannel> PackageManagerImpl::createAbortChannel()
+{
+    check();
+    return new AbortChannel;
+}
+
+// XModifyBroadcaster
+
+void PackageManagerImpl::addModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+    check();
+    rBHelper.addListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+
+void PackageManagerImpl::removeModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+    check();
+    rBHelper.removeListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+
+OUString PackageManagerImpl::detectMediaType(
+    ::ucbhelper::Content const & ucbContent_, bool throw_exc )
+{
+    ::ucbhelper::Content ucbContent(ucbContent_);
+    OUString url( ucbContent.getURL() );
+    OUString mediaType;
+    if (url.match( "vnd.sun.star.tdoc:" ) || url.match( "vnd.sun.star.pkg:" ))
+    {
+        try {
+            ucbContent.getPropertyValue( "MediaType" ) >>= mediaType;
+        }
+        catch (const beans::UnknownPropertyException &) {
+        }
+        OSL_ENSURE( !mediaType.isEmpty(), "### no media-type?!" );
+    }
+    if (mediaType.isEmpty())
+    {
+        try {
+            Reference<deployment::XPackage> xPackage(
+                m_xRegistry->bindPackage(
+                    url, OUString(), false, OUString(), ucbContent.getCommandEnvironment() ) );
+            const Reference<deployment::XPackageTypeInfo> xPackageType(
+                xPackage->getPackageType() );
+            OSL_ASSERT( xPackageType.is() );
+            if (xPackageType.is())
+                mediaType = xPackageType->getMediaType();
+        }
+        catch (const lang::IllegalArgumentException &) {
+            if (throw_exc)
+                throw;
+            css::uno::Any ex( cppu::getCaughtException() );
+            SAL_WARN( "desktop", exceptionToString(ex) );
+        }
+    }
+    return mediaType;
+}
+
+
+OUString PackageManagerImpl::insertToActivationLayer(
+    Sequence<beans::NamedValue> const & properties,
+    OUString const & mediaType, ::ucbhelper::Content const & sourceContent_,
+    OUString const & title, ActivePackages::Data * dbData )
+{
+    ::ucbhelper::Content sourceContent(sourceContent_);
+    Reference<XCommandEnvironment> xCmdEnv(
+        sourceContent.getCommandEnvironment() );
+
+    OUString baseDir(m_activePackages_expanded);
+    ::utl::TempFile aTemp(&baseDir, false);
+    OUString tempEntry = aTemp.GetURL();
+    tempEntry = tempEntry.copy(tempEntry.lastIndexOf('/') + 1);
+    OUString destFolder = makeURL( m_activePackages, tempEntry) + "_";
+
+    // prepare activation folder:
+    ::ucbhelper::Content destFolderContent;
+    create_folder( &destFolderContent, destFolder, xCmdEnv );
+
+    // copy content into activation temp dir:
+    if (mediaType.matchIgnoreAsciiCase("application/vnd.sun.star.package-bundle") ||
+        // xxx todo: more sophisticated parsing
+        mediaType.matchIgnoreAsciiCase("application/vnd.sun.star.legacy-package-bundle"))
+    {
+        // inflate content:
+        OUStringBuffer buf;
+        if (!sourceContent.isFolder())
+        {
+            buf.append( "vnd.sun.star.zip://" );
+            buf.append( ::rtl::Uri::encode( sourceContent.getURL(),
+                                            rtl_UriCharClassRegName,
+                                            rtl_UriEncodeIgnoreEscapes,
+                                            RTL_TEXTENCODING_UTF8 ) );
+        }
+        else
+        {
+            //Folder. No need to unzip, just copy
+            buf.append(sourceContent.getURL());
+        }
+        buf.append( '/' );
+        sourceContent = ::ucbhelper::Content(
+            buf.makeStringAndClear(), xCmdEnv, m_xComponentContext );
+    }
+    destFolderContent.transferContent(
+            sourceContent, ::ucbhelper::InsertOperation::Copy,
+            title, NameClash::OVERWRITE );
+
+
+    // write to DB:
+    //bundled extensions should only be added by the synchronizeAddedExtensions
+    //functions. Moreover, there is no "temporary folder" for bundled extensions.
+    OSL_ASSERT(!(m_context == "bundled"));
+    OUString sFolderUrl = makeURLAppendSysPathSegment(destFolderContent.getURL(), title);
+    DescriptionInfoset info =
+        dp_misc::getDescriptionInfoset(sFolderUrl);
+    dbData->temporaryName = tempEntry;
+    dbData->fileName = title;
+    dbData->mediaType = mediaType;
+    dbData->version = info.getVersion();
+
+    //No write the properties file next to the extension
+    ExtensionProperties props(sFolderUrl, properties, xCmdEnv, m_xComponentContext);
+    props.write();
+    return destFolder;
+}
+
+
+void PackageManagerImpl::insertToActivationLayerDB(
+    OUString const & id, ActivePackages::Data const & dbData )
+{
+    //access to the database must be guarded. See removePackage
+    const ::osl::MutexGuard guard( m_aMutex );
+    m_activePackagesDB->put( id, dbData );
+}
+
+
+/* The function returns true if there is an extension with the same id already
+    installed which needs to be uninstalled, before the new extension can be installed.
+*/
+bool PackageManagerImpl::isInstalled(
+    Reference<deployment::XPackage> const & package)
+{
+    OUString id(dp_misc::getIdentifier(package));
+    OUString fn(package->getName());
+    bool bInstalled = false;
+    if (m_activePackagesDB->has( id, fn ))
+    {
+        bInstalled = true;
+    }
+    return bInstalled;
+}
+
+// XPackageManager
+
+Reference<deployment::XPackage> PackageManagerImpl::importExtension(
+    Reference<deployment::XPackage> const & extension,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    return addPackage(extension->getURL(), Sequence<beans::NamedValue>(),
+                      OUString(), xAbortChannel, xCmdEnv_);
+}
+
+/* The function adds an extension but does not register it!!!
+    It may not do any user interaction. This is done in XExtensionManager::addExtension
+*/
+Reference<deployment::XPackage> PackageManagerImpl::addPackage(
+    OUString const & url,
+    css::uno::Sequence<css::beans::NamedValue> const & properties,
+    OUString const & mediaType_,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    check();
+    if (m_readOnly)
+    {
+        OUString message;
+        if (m_context == "shared")
+            message = "You need write permissions to install a shared extension!";
+        else
+            message = "You need write permissions to install this extension!";
+        throw deployment::DeploymentException(
+            message, static_cast<OWeakObject *>(this), Any() );
+    }
+    Reference<XCommandEnvironment> xCmdEnv;
+    if (m_xLogFile.is())
+        xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv_, m_xLogFile ) );
+    else
+        xCmdEnv.set( xCmdEnv_ );
+
+    try {
+        ::ucbhelper::Content sourceContent;
+        (void)create_ucb_content( &sourceContent, url, xCmdEnv ); // throws exc
+        const OUString title( StrTitle::getTitle( sourceContent ) );
+        const OUString title_enc( ::rtl::Uri::encode(
+                                      title, rtl_UriCharClassPchar,
+                                      rtl_UriEncodeIgnoreEscapes,
+                                      RTL_TEXTENCODING_UTF8 ) );
+        OUString destFolder;
+
+        OUString mediaType(mediaType_);
+        if (mediaType.isEmpty())
+            mediaType = detectMediaType( sourceContent );
+
+        Reference<deployment::XPackage> xPackage;
+        // copy file:
+        progressUpdate(
+            DpResId(RID_STR_COPYING_PACKAGE) + title, xCmdEnv );
+        if (m_activePackages.isEmpty())
+        {
+            ::ucbhelper::Content docFolderContent;
+            create_folder( &docFolderContent, m_context, xCmdEnv );
+            // copy into document, first:
+            docFolderContent.transferContent(
+                    sourceContent, ::ucbhelper::InsertOperation::Copy,
+                    OUString(),
+                    NameClash::ASK /* xxx todo: ASK not needed? */);
+            // set media-type:
+            ::ucbhelper::Content docContent(
+                makeURL( m_context, title_enc ), xCmdEnv, m_xComponentContext );
+                //TODO #i73136#: using title instead of id can lead to
+                // clashes, but the whole m_activePackages.getLength()==0
+                // case (i.e., document-relative deployment) currently does
+                // not work, anyway.
+            docContent.setPropertyValue("MediaType", Any(mediaType) );
+
+            // xxx todo: obsolete in the future
+            try {
+                docFolderContent.executeCommand( "flush", Any() );
+            }
+            catch (const UnsupportedCommandException &) {
+            }
+        }
+        ActivePackages::Data dbData;
+        destFolder = insertToActivationLayer(
+            properties, mediaType, sourceContent, title, &dbData );
+
+
+        // bind activation package:
+        //Because every shared/user extension will be unpacked in a folder,
+        //which was created with a unique name we will always have two different
+        //XPackage objects, even if the second extension is the same.
+        //Therefore bindPackage does not need a guard here.
+        xPackage = m_xRegistry->bindPackage(
+            makeURL( destFolder, title_enc ), mediaType, false, OUString(), xCmdEnv );
+
+        OSL_ASSERT( xPackage.is() );
+        if (xPackage.is())
+        {
+            bool install = false;
+            try
+            {
+                OUString const id = dp_misc::getIdentifier( xPackage );
+
+                ::osl::MutexGuard g(m_addMutex);
+                if (isInstalled(xPackage))
+                {
+                    //Do not guard the complete function with the getMutex
+                    removePackage(id, xPackage->getName(), xAbortChannel,
+                                  xCmdEnv);
+                }
+                install = true;
+                insertToActivationLayerDB(id, dbData);
+            }
+            catch (...)
+            {
+                deletePackageFromCache( xPackage, destFolder );
+                throw;
+            }
+            if (!install)
+            {
+                deletePackageFromCache( xPackage, destFolder );
+            }
+            //ToDo: We should notify only if the extension is registered
+            fireModified();
+        }
+        return xPackage;
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const CommandAbortedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const deployment::DeploymentException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        logIntern( exc );
+        throw deployment::DeploymentException(
+            DpResId(RID_STR_ERROR_WHILE_ADDING) + url,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+void PackageManagerImpl::deletePackageFromCache(
+    Reference<deployment::XPackage> const & xPackage,
+    OUString const & destFolder)
+{
+    try_dispose( xPackage );
+
+    //we remove the package from the uno cache
+    //no service from the package may be loaded at this time!!!
+    erase_path( destFolder, Reference<XCommandEnvironment>(),
+        false /* no throw: ignore errors */ );
+    //rm last character '_'
+    OUString url = destFolder.copy(0, destFolder.getLength() - 1);
+    erase_path( url, Reference<XCommandEnvironment>(),
+        false /* no throw: ignore errors */ );
+
+}
+
+void PackageManagerImpl::removePackage(
+    OUString const & id, OUString const & fileName,
+    Reference<task::XAbortChannel> const & /*xAbortChannel*/,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    check();
+
+    Reference<XCommandEnvironment> xCmdEnv;
+    if (m_xLogFile.is())
+        xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv_, m_xLogFile ) );
+    else
+        xCmdEnv.set( xCmdEnv_ );
+
+    try {
+        Reference<deployment::XPackage> xPackage;
+        {
+            const ::osl::MutexGuard guard(m_aMutex);
+            //Check if this extension exist and throw an IllegalArgumentException
+            //if it does not
+            //If the files of the extension are already removed, or there is a
+            //different extension at the same place, for example after updating the
+            //extension, then the returned object is that which uses the database data.
+            xPackage = getDeployedPackage_(id, fileName, xCmdEnv );
+
+
+            //Because the extension is only removed the next time the extension
+            //manager runs after restarting OOo, we need to indicate that a
+            //shared extension was "deleted". When a user starts OOo, then it
+            //will check if something changed in the shared repository. Based on
+            //the flag file it will then recognize, that the extension was
+            //deleted and can then update the extension database of the shared
+            //extensions in the user installation.
+            if ( xPackage.is() && !m_readOnly && !xPackage->isRemoved() && (m_context == "shared"))
+            {
+                ActivePackages::Data val;
+                m_activePackagesDB->get( & val, id, fileName);
+                OSL_ASSERT(!val.temporaryName.isEmpty());
+                OUString url(makeURL(m_activePackages_expanded,
+                                     val.temporaryName + "removed"));
+                ::ucbhelper::Content contentRemoved(url, xCmdEnv, m_xComponentContext);
+                OUString aUserName;
+                ::osl::Security aSecurity;
+                aSecurity.getUserName( aUserName );
+
+                OString stamp = OUStringToOString(aUserName, RTL_TEXTENCODING_UTF8);
+                Reference<css::io::XInputStream> xData(
+                    ::xmlscript::createInputStream(
+                            reinterpret_cast<sal_Int8 const *>(stamp.getStr()),
+                            stamp.getLength() ) );
+                contentRemoved.writeStream( xData, true /* replace existing */ );
+            }
+            m_activePackagesDB->erase( id, fileName ); // to be removed upon next start
+            //remove any cached data hold by the backend
+            m_xRegistry->packageRemoved(xPackage->getURL(), xPackage->getPackageType()->getMediaType());
+        }
+        try_dispose( xPackage );
+
+        fireModified();
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const CommandAbortedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const deployment::DeploymentException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        logIntern( exc );
+        throw deployment::DeploymentException(
+            DpResId(RID_STR_ERROR_WHILE_REMOVING) + id,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+OUString PackageManagerImpl::getDeployPath( ActivePackages::Data const & data )
+{
+    OUStringBuffer buf;
+    buf.append( data.temporaryName );
+    //The bundled extensions are not contained in an additional folder
+    //with a unique name. data.temporaryName contains already the
+    //UTF8 encoded folder name. See PackageManagerImpl::synchronize
+    if (m_context != "bundled")
+    {
+        buf.append( "_/" );
+        buf.append( ::rtl::Uri::encode( data.fileName, rtl_UriCharClassPchar,
+                                    rtl_UriEncodeIgnoreEscapes,
+                                    RTL_TEXTENCODING_UTF8 ) );
+    }
+    return makeURL( m_activePackages, buf.makeStringAndClear() );
+}
+
+
+Reference<deployment::XPackage> PackageManagerImpl::getDeployedPackage_(
+    OUString const & id, OUString const & fileName,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    ActivePackages::Data val;
+    if (m_activePackagesDB->get( &val, id, fileName ))
+    {
+        return getDeployedPackage_( id, val, xCmdEnv );
+    }
+    throw lang::IllegalArgumentException(
+        DpResId(RID_STR_NO_SUCH_PACKAGE) + id,
+        static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+}
+
+
+Reference<deployment::XPackage> PackageManagerImpl::getDeployedPackage_(
+    std::u16string_view id, ActivePackages::Data const & data,
+    Reference<XCommandEnvironment> const & xCmdEnv, bool ignoreAlienPlatforms )
+{
+    if (ignoreAlienPlatforms)
+    {
+        OUString type, subType;
+        INetContentTypeParameterList params;
+        if (INetContentTypes::parse( data.mediaType, type, subType, &params ))
+        {
+            auto const iter = params.find(OString("platform"));
+            if (iter != params.end() && !platform_fits(iter->second.m_sValue))
+                throw lang::IllegalArgumentException(
+                    DpResId(RID_STR_NO_SUCH_PACKAGE) + id,
+                    static_cast<OWeakObject *>(this),
+                    static_cast<sal_Int16>(-1) );
+        }
+    }
+    Reference<deployment::XPackage> xExtension;
+    try
+    {
+        //Ignore extensions where XPackage::checkPrerequisites failed.
+        //They must not be usable for this user.
+        if (data.failedPrerequisites == "0")
+        {
+            xExtension = m_xRegistry->bindPackage(
+                getDeployPath( data ), data.mediaType, false, OUString(), xCmdEnv );
+        }
+    }
+    catch (const deployment::InvalidRemovedParameterException& e)
+    {
+        xExtension = e.Extension;
+    }
+    return xExtension;
+}
+
+
+Sequence< Reference<deployment::XPackage> >
+PackageManagerImpl::getDeployedPackages_(
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    std::vector< Reference<deployment::XPackage> > packages;
+    ActivePackages::Entries id2temp( m_activePackagesDB->getEntries() );
+    for (auto const& elem : id2temp)
+    {
+        if (elem.second.failedPrerequisites != "0")
+            continue;
+        try {
+            packages.push_back(
+                getDeployedPackage_(
+                    elem.first, elem.second, xCmdEnv,
+                    true /* xxx todo: think of GUI:
+                            ignore other platforms than the current one */ ) );
+        }
+        catch (const lang::IllegalArgumentException &) {
+            // ignore
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+        catch (const deployment::DeploymentException&) {
+            // ignore
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+    }
+    return comphelper::containerToSequence(packages);
+}
+
+
+Reference<deployment::XPackage> PackageManagerImpl::getDeployedPackage(
+    OUString const & id, OUString const & fileName,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    check();
+    Reference<XCommandEnvironment> xCmdEnv;
+    if (m_xLogFile.is())
+        xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv_, m_xLogFile ) );
+    else
+        xCmdEnv.set( xCmdEnv_ );
+
+    try {
+        const ::osl::MutexGuard guard( m_aMutex );
+        return getDeployedPackage_( id, fileName, xCmdEnv );
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const deployment::DeploymentException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        logIntern( exc );
+        throw deployment::DeploymentException(
+            // ought never occur...
+            "error while accessing deployed package: " + id,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+Sequence< Reference<deployment::XPackage> >
+PackageManagerImpl::getDeployedPackages(
+    Reference<task::XAbortChannel> const &,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    check();
+    Reference<XCommandEnvironment> xCmdEnv;
+    if (m_xLogFile.is())
+        xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv_, m_xLogFile ) );
+    else
+        xCmdEnv.set( xCmdEnv_ );
+
+    try {
+        const ::osl::MutexGuard guard( m_aMutex );
+        return getDeployedPackages_( xCmdEnv );
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const CommandAbortedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const deployment::DeploymentException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        logIntern( exc );
+        throw deployment::DeploymentException(
+            // ought never occur...
+            "error while getting all deployed packages: " + m_context,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+//ToDo: the function must not call registerPackage, do this in
+//XExtensionManager.reinstallDeployedExtensions
+void PackageManagerImpl::reinstallDeployedPackages(
+    sal_Bool force, Reference<task::XAbortChannel> const &  /*xAbortChannel*/,
+    Reference<XCommandEnvironment> const & xCmdEnv_ )
+{
+    check();
+    if (!force && office_is_running())
+        throw RuntimeException(
+            "You must close any running Office process before reinstalling packages!",
+            static_cast<OWeakObject *>(this) );
+
+    Reference<XCommandEnvironment> xCmdEnv;
+    if (m_xLogFile.is())
+        xCmdEnv.set( new CmdEnvWrapperImpl( xCmdEnv_, m_xLogFile ) );
+    else
+        xCmdEnv.set( xCmdEnv_ );
+
+    try {
+        ProgressLevel progress(
+            xCmdEnv, "Reinstalling all deployed packages..." );
+
+        try_dispose( m_xRegistry );
+        m_xRegistry.clear();
+        if (!m_registryCache.isEmpty())
+            erase_path( m_registryCache, xCmdEnv );
+        initRegistryBackends();
+        Reference<util::XUpdatable> xUpdatable( m_xRegistry, UNO_QUERY );
+        if (xUpdatable.is())
+            xUpdatable->update();
+
+        //registering is done by the ExtensionManager service.
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const CommandAbortedException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const deployment::DeploymentException & exc) {
+        logIntern( Any(exc) );
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        logIntern( exc );
+        throw deployment::DeploymentException(
+            "Error while reinstalling all previously deployed packages of context " + m_context,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+sal_Bool SAL_CALL PackageManagerImpl::isReadOnly(  )
+{
+    return m_readOnly;
+}
+bool PackageManagerImpl::synchronizeRemovedExtensions(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<css::ucb::XCommandEnvironment> const & xCmdEnv)
+{
+
+    //find all which are in the extension data base but which
+    //are removed already.
+    OSL_ASSERT(!(m_context == "user"));
+    bool bModified = false;
+    ActivePackages::Entries id2temp( m_activePackagesDB->getEntries() );
+
+    bool bShared = (m_context == "shared");
+
+    for (auto const& elem : id2temp)
+    {
+        try
+        {
+            //Get the URL to the extensions folder, first make the url for the
+            //shared repository including the temporary name
+            OUString url = makeURL(m_activePackages, elem.second.temporaryName);
+            if (bShared)
+                url = makeURLAppendSysPathSegment( url + "_", elem.second.fileName);
+
+            bool bRemoved = false;
+            //Check if the URL to the extension is still the same
+            ::ucbhelper::Content contentExtension;
+
+            if (!create_ucb_content(
+                    &contentExtension, url,
+                    Reference<XCommandEnvironment>(), false))
+            {
+                bRemoved = true;
+            }
+
+            //The folder is in the extension database, but it can still be deleted.
+            //look for the xxx.tmpremoved file
+            //There can also be the case that a different extension was installed
+            //in a "temp" folder with name that is already used.
+            if (!bRemoved && bShared)
+            {
+                ::ucbhelper::Content contentRemoved;
+
+                if (create_ucb_content(
+                        &contentRemoved,
+                        m_activePackages_expanded + "/" +
+                        elem.second.temporaryName + "removed",
+                        Reference<XCommandEnvironment>(), false))
+                {
+                    bRemoved = true;
+                }
+            }
+
+            if (!bRemoved)
+            {
+                //There may be another extensions at the same place
+                dp_misc::DescriptionInfoset infoset =
+                    dp_misc::getDescriptionInfoset(url);
+                OSL_ENSURE(infoset.hasDescription() && infoset.getIdentifier(),
+                           "Extension Manager: bundled and shared extensions "
+                           "must have an identifier and a version");
+                if (infoset.hasDescription() &&
+                    infoset.getIdentifier() &&
+                    ( elem.first != *(infoset.getIdentifier())
+                      || elem.second.version != infoset.getVersion()))
+                {
+                    bRemoved = true;
+                }
+
+            }
+            if (bRemoved)
+            {
+                Reference<deployment::XPackage> xPackage = m_xRegistry->bindPackage(
+                    url, elem.second.mediaType, true, elem.first, xCmdEnv );
+                OSL_ASSERT(xPackage.is()); //Even if the files are removed, we must get the object.
+                xPackage->revokePackage(true, xAbortChannel, xCmdEnv);
+                removePackage(xPackage->getIdentifier().Value, xPackage->getName(),
+                              xAbortChannel, xCmdEnv);
+                bModified = true;
+            }
+        }
+        catch( const uno::Exception & )
+        {
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "");
+        }
+    }
+    return bModified;
+}
+
+
+bool PackageManagerImpl::synchronizeAddedExtensions(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<css::ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    bool bModified = false;
+    OSL_ASSERT(!(m_context == "user"));
+
+    ActivePackages::Entries id2temp( m_activePackagesDB->getEntries() );
+    //check if the folder exist at all. The shared extension folder
+    //may not exist for a normal user.
+    bool bOk=true;
+    try
+    {
+        bOk = create_ucb_content(
+                nullptr, m_activePackages_expanded, Reference<css::ucb::XCommandEnvironment>(), false);
+    }
+    catch (const css::ucb::ContentCreationException&)
+    {
+        bOk = false;
+    }
+
+    if (!bOk)
+        return bModified;
+
+    ::ucbhelper::Content tempFolder( m_activePackages_expanded, xCmdEnv, m_xComponentContext );
+    Reference<sdbc::XResultSet> xResultSet(
+        StrTitle::createCursor( tempFolder,
+                                ::ucbhelper::INCLUDE_FOLDERS_ONLY ) );
+
+    while (xResultSet->next())
+    {
+        try
+        {
+            OUString title(
+                Reference<sdbc::XRow>(
+                    xResultSet, UNO_QUERY_THROW )->getString(
+                        1 /* Title */ ) );
+            //The temporary folders of user and shared have an '_' at then end.
+            //But the name in ActivePackages.temporaryName is saved without.
+            OUString title2 = title;
+            bool bShared = (m_context == "shared");
+            if (bShared)
+            {
+                OSL_ASSERT(title2.endsWith("_"));
+                title2 = title2.copy(0, title2.getLength() -1);
+            }
+            OUString titleEncoded =  ::rtl::Uri::encode(
+                title2, rtl_UriCharClassPchar,
+                rtl_UriEncodeIgnoreEscapes,
+                RTL_TEXTENCODING_UTF8);
+
+            //It is sufficient to check for the folder name, because when the administrator
+            //installed the extension it was already checked if there is one with the
+            //same identifier.
+            const MatchTempDir match(titleEncoded);
+            if (std::none_of( id2temp.begin(), id2temp.end(), match ))
+            {
+
+                // The folder was not found in the data base, so it must be
+                // an added extension
+                OUString url(m_activePackages_expanded + "/" + titleEncoded);
+                OUString sExtFolder;
+                if (bShared) //that is, shared
+                {
+                    //Check if the extension was not "deleted" already which is indicated
+                    //by a xxx.tmpremoved file
+                    ::ucbhelper::Content contentRemoved;
+                    if (create_ucb_content(&contentRemoved, url + "removed",
+                                           Reference<XCommandEnvironment>(), false))
+                        continue;
+                    sExtFolder = getExtensionFolder(
+                        m_activePackages_expanded + "/" + titleEncoded + "_",
+                        xCmdEnv, m_xComponentContext);
+                    url = makeURLAppendSysPathSegment(m_activePackages_expanded, title);
+                    url = makeURLAppendSysPathSegment(url, sExtFolder);
+                }
+                Reference<deployment::XPackage> xPackage = m_xRegistry->bindPackage(
+                    url, OUString(), false, OUString(), xCmdEnv );
+                if (xPackage.is())
+                {
+                    OUString id = dp_misc::getIdentifier( xPackage );
+
+                    //Prepare the database entry
+                    ActivePackages::Data dbData;
+
+                    dbData.temporaryName = titleEncoded;
+                    if (bShared)
+                        dbData.fileName = sExtFolder;
+                    else
+                        dbData.fileName = title;
+                    dbData.mediaType = xPackage->getPackageType()->getMediaType();
+                    dbData.version = xPackage->getVersion();
+                    SAL_WARN_IF(
+                        dbData.version.isEmpty(), "desktop.deployment",
+                        "bundled/shared extension " << id << " at <" << url
+                            << "> has no explicit version");
+
+                    //We provide a special command environment that will prevent
+                    //showing a license if simple-license/@accept-by = "admin"
+                    //It will also prevent showing the license for bundled extensions
+                    //which is not supported.
+                    OSL_ASSERT(!(m_context == "user"));
+
+                    // shall the license be suppressed?
+                    DescriptionInfoset info =
+                        dp_misc::getDescriptionInfoset(url);
+                    ::std::optional<dp_misc::SimpleLicenseAttributes>
+                          attr = info.getSimpleLicenseAttributes();
+                    ExtensionProperties props(url, xCmdEnv, m_xComponentContext);
+                    bool bNoLicense = false;
+                    if (attr && attr->suppressIfRequired && props.isSuppressedLicense())
+                        bNoLicense = true;
+
+                    Reference<ucb::XCommandEnvironment> licCmdEnv(
+                        new LicenseCommandEnv(xCmdEnv->getInteractionHandler(),
+                                              bNoLicense, m_context));
+                    sal_Int32 failedPrereq = xPackage->checkPrerequisites(
+                        xAbortChannel, licCmdEnv, false);
+                    //Remember that this failed. For example, the user
+                    //could have declined the license. Then the next time the
+                    //extension folder is investigated we do not want to
+                    //try to install the extension again.
+                    dbData.failedPrerequisites = OUString::number(failedPrereq);
+                    insertToActivationLayerDB(id, dbData);
+                    bModified = true;
+                }
+            }
+        }
+        catch (const uno::Exception &)
+        {
+            // Looks like exceptions being caught here is not an uncommon case.
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "");
+        }
+    }
+    return bModified;
+}
+
+sal_Bool PackageManagerImpl::synchronize(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<css::ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    check();
+    bool bModified = false;
+    if (m_context == "user")
+        return bModified;
+    bModified |=
+        synchronizeRemovedExtensions(xAbortChannel, xCmdEnv);
+    bModified |= synchronizeAddedExtensions(xAbortChannel, xCmdEnv);
+
+    return bModified;
+}
+
+Sequence< Reference<deployment::XPackage> > PackageManagerImpl::getExtensionsWithUnacceptedLicenses(
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    std::vector<Reference<deployment::XPackage> > vec;
+
+    try
+    {
+        const ::osl::MutexGuard guard( m_aMutex );
+        // clean up activation layer, scan for zombie temp dirs:
+        ActivePackages::Entries id2temp( m_activePackagesDB->getEntries() );
+
+        bool bShared = (m_context == "shared");
+
+        for (auto const& elem : id2temp)
+        {
+            //Get the database entry
+            ActivePackages::Data const & dbData = elem.second;
+            sal_Int32 failedPrereq = dbData.failedPrerequisites.toInt32();
+            //If the installation failed for other reason then the license then we
+            //ignore it.
+            if (failedPrereq ^ deployment::Prerequisites::LICENSE)
+                continue;
+
+            //Prepare the URL to the extension
+            OUString url = makeURL(m_activePackages, elem.second.temporaryName);
+            if (bShared)
+                url = makeURLAppendSysPathSegment( url + "_", elem.second.fileName);
+
+            Reference<deployment::XPackage> p = m_xRegistry->bindPackage(
+                url, OUString(), false, OUString(), xCmdEnv );
+
+            if (p.is())
+                vec.push_back(p);
+
+        }
+        return ::comphelper::containerToSequence(vec);
+    }
+    catch (const deployment::DeploymentException &)
+    {
+        throw;
+    }
+    catch (const RuntimeException&)
+    {
+        throw;
+    }
+    catch (...)
+    {
+        Any exc = ::cppu::getCaughtException();
+        deployment::DeploymentException de(
+            "PackageManagerImpl::getExtensionsWithUnacceptedLicenses",
+            static_cast<OWeakObject*>(this), exc);
+        exc <<= de;
+        ::cppu::throwException(exc);
+    }
+
+    return ::comphelper::containerToSequence(vec);
+}
+
+sal_Int32 PackageManagerImpl::checkPrerequisites(
+    css::uno::Reference<css::deployment::XPackage> const & extension,
+    css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+    css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    try
+    {
+        if (!extension.is())
+            return 0;
+        if (m_context != extension->getRepositoryName())
+            throw lang::IllegalArgumentException(
+                "PackageManagerImpl::checkPrerequisites: extension is not from this repository.",
+                nullptr, 0);
+
+        ActivePackages::Data dbData;
+        OUString id = dp_misc::getIdentifier(extension);
+        if (!m_activePackagesDB->get( &dbData, id, OUString()))
+        {
+            throw lang::IllegalArgumentException(
+                "PackageManagerImpl::checkPrerequisites: unknown extension",
+                nullptr, 0);
+
+        }
+        //If the license was already displayed, then do not show it again
+        Reference<ucb::XCommandEnvironment> _xCmdEnv = xCmdEnv;
+        sal_Int32 prereq = dbData.failedPrerequisites.toInt32();
+        if ( !(prereq & deployment::Prerequisites::LICENSE))
+            _xCmdEnv = new NoLicenseCommandEnv(xCmdEnv->getInteractionHandler());
+
+        sal_Int32 failedPrereq = extension->checkPrerequisites(
+            xAbortChannel, _xCmdEnv, false);
+        dbData.failedPrerequisites = OUString::number(failedPrereq);
+        insertToActivationLayerDB(id, dbData);
+        return 0;
+    }
+    catch ( const deployment::DeploymentException& ) {
+        throw;
+    } catch ( const ucb::CommandFailedException & ) {
+        throw;
+    } catch ( const ucb::CommandAbortedException & ) {
+        throw;
+    } catch (const lang::IllegalArgumentException &) {
+        throw;
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (...) {
+        uno::Any excOccurred = ::cppu::getCaughtException();
+        deployment::DeploymentException exc(
+            "PackageManagerImpl::checkPrerequisites: exception ",
+            static_cast<OWeakObject*>(this), excOccurred);
+        throw exc;
+    }
+}
+
+
+PackageManagerImpl::CmdEnvWrapperImpl::~CmdEnvWrapperImpl()
+{
+}
+
+
+PackageManagerImpl::CmdEnvWrapperImpl::CmdEnvWrapperImpl(
+    Reference<XCommandEnvironment> const & xUserCmdEnv,
+    Reference<XProgressHandler> const & xLogFile )
+    : m_xLogFile( xLogFile )
+{
+    if (xUserCmdEnv.is()) {
+        m_xUserProgress.set( xUserCmdEnv->getProgressHandler() );
+        m_xUserInteractionHandler.set( xUserCmdEnv->getInteractionHandler() );
+    }
+}
+
+// XCommandEnvironment
+
+Reference<task::XInteractionHandler>
+PackageManagerImpl::CmdEnvWrapperImpl::getInteractionHandler()
+{
+    return m_xUserInteractionHandler;
+}
+
+
+Reference<XProgressHandler>
+PackageManagerImpl::CmdEnvWrapperImpl::getProgressHandler()
+{
+    return this;
+}
+
+// XProgressHandler
+
+void PackageManagerImpl::CmdEnvWrapperImpl::push( Any const & Status )
+{
+    if (m_xLogFile.is())
+        m_xLogFile->push( Status );
+    if (m_xUserProgress.is())
+        m_xUserProgress->push( Status );
+}
+
+
+void PackageManagerImpl::CmdEnvWrapperImpl::update( Any const & Status )
+{
+    if (m_xLogFile.is())
+        m_xLogFile->update( Status );
+    if (m_xUserProgress.is())
+        m_xUserProgress->update( Status );
+}
+
+
+void PackageManagerImpl::CmdEnvWrapperImpl::pop()
+{
+    if (m_xLogFile.is())
+        m_xLogFile->pop();
+    if (m_xUserProgress.is())
+        m_xUserProgress->pop();
+}
+
+} // namespace dp_manager
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_manager.h b/desktop/source/deployment/manager/dp_manager.h
new file mode 100644
index 000000000..a2079da23
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_manager.h
@@ -0,0 +1,232 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include "dp_activepackages.hxx"
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <ucbhelper/content.hxx>
+#include <com/sun/star/deployment/XPackageRegistry.hpp>
+#include <com/sun/star/deployment/XPackageManager.hpp>
+#include <memory>
+#include <string_view>
+#include <utility>
+
+namespace dp_manager {
+
+typedef ::cppu::WeakComponentImplHelper<
+    css::deployment::XPackageManager > t_pm_helper;
+
+
+class PackageManagerImpl final : private cppu::BaseMutex, public t_pm_helper
+{
+    css::uno::Reference<css::uno::XComponentContext> m_xComponentContext;
+    OUString m_context;
+    OUString m_registrationData;
+    OUString m_registrationData_expanded;
+    OUString m_registryCache;
+    bool m_readOnly;
+
+    OUString m_activePackages;
+    OUString m_activePackages_expanded;
+    std::unique_ptr< ActivePackages > m_activePackagesDB;
+    //This mutex is only used for synchronization in addPackage
+    ::osl::Mutex m_addMutex;
+    css::uno::Reference<css::ucb::XProgressHandler> m_xLogFile;
+    inline void logIntern( css::uno::Any const & status );
+    void fireModified();
+
+    css::uno::Reference<css::deployment::XPackageRegistry> m_xRegistry;
+
+    void initRegistryBackends();
+    void initActivationLayer(
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv );
+    OUString detectMediaType(
+        ::ucbhelper::Content const & ucbContent, bool throw_exc = true );
+    OUString insertToActivationLayer(
+        css::uno::Sequence<css::beans::NamedValue> const & properties,
+        OUString const & mediaType,
+        ::ucbhelper::Content const & sourceContent,
+        OUString const & title, ActivePackages::Data * dbData );
+    void insertToActivationLayerDB(
+        OUString const & id, ActivePackages::Data const & dbData );
+
+    static void deletePackageFromCache(
+        css::uno::Reference<css::deployment::XPackage> const & xPackage,
+        OUString const & destFolder );
+
+    bool isInstalled(
+        css::uno::Reference<css::deployment::XPackage> const & package);
+
+    bool synchronizeRemovedExtensions(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+
+    bool synchronizeAddedExtensions(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+
+    class CmdEnvWrapperImpl
+        : public ::cppu::WeakImplHelper< css::ucb::XCommandEnvironment,
+                                          css::ucb::XProgressHandler >
+    {
+        css::uno::Reference<css::ucb::XProgressHandler> m_xLogFile;
+        css::uno::Reference<css::ucb::XProgressHandler> m_xUserProgress;
+        css::uno::Reference<css::task::XInteractionHandler>
+        m_xUserInteractionHandler;
+
+    public:
+        virtual ~CmdEnvWrapperImpl() override;
+        CmdEnvWrapperImpl(
+            css::uno::Reference<css::ucb::XCommandEnvironment>
+            const & xUserCmdEnv,
+            css::uno::Reference<css::ucb::XProgressHandler> const & xLogFile );
+
+        // XCommandEnvironment
+        virtual css::uno::Reference<css::task::XInteractionHandler> SAL_CALL
+        getInteractionHandler() override;
+        virtual css::uno::Reference<css::ucb::XProgressHandler> SAL_CALL
+        getProgressHandler() override;
+
+        // XProgressHandler
+        virtual void SAL_CALL push( css::uno::Any const & Status ) override;
+        virtual void SAL_CALL update( css::uno::Any const & Status ) override;
+        virtual void SAL_CALL pop() override;
+    };
+
+    inline void check();
+    virtual void SAL_CALL disposing() override;
+
+    virtual ~PackageManagerImpl() override;
+    PackageManagerImpl(
+        css::uno::Reference<css::uno::XComponentContext> xComponentContext, OUString context )
+        : t_pm_helper( m_aMutex ),
+          m_xComponentContext(std::move( xComponentContext )),
+          m_context(std::move( context )),
+          m_readOnly( true )
+        {}
+
+public:
+    static css::uno::Reference<css::deployment::XPackageManager> create(
+        css::uno::Reference<css::uno::XComponentContext>
+        const & xComponentContext, OUString const & context );
+
+    // XComponent
+    virtual void SAL_CALL dispose() override;
+    virtual void SAL_CALL addEventListener(
+        css::uno::Reference<css::lang::XEventListener> const & xListener ) override;
+    virtual void SAL_CALL removeEventListener(
+        css::uno::Reference<css::lang::XEventListener> const & xListener ) override;
+
+    // XModifyBroadcaster
+    virtual void SAL_CALL addModifyListener(
+        css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+    virtual void SAL_CALL removeModifyListener(
+        css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+
+    // XPackageManager
+    virtual OUString SAL_CALL getContext() override;
+    virtual css::uno::Sequence<
+        css::uno::Reference<css::deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+
+    virtual css::uno::Reference<css::task::XAbortChannel> SAL_CALL
+    createAbortChannel() override;
+
+    virtual css::uno::Reference<css::deployment::XPackage> SAL_CALL addPackage(
+        OUString const & url,
+        css::uno::Sequence<css::beans::NamedValue> const & properties,
+        OUString const & mediaType,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Reference<css::deployment::XPackage> SAL_CALL importExtension(
+        css::uno::Reference<css::deployment::XPackage> const & extension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL removePackage(
+        OUString const & id, OUString const & fileName,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    OUString getDeployPath( ActivePackages::Data const & data );
+    css::uno::Reference<css::deployment::XPackage> getDeployedPackage_(
+        OUString const & id, OUString const & fileName,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv );
+    css::uno::Reference<css::deployment::XPackage> getDeployedPackage_(
+        std::u16string_view id, ActivePackages::Data const & data,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+        bool ignoreAlienPlatforms = false );
+    virtual css::uno::Reference<css::deployment::XPackage> SAL_CALL
+    getDeployedPackage(
+        OUString const & id, OUString const & fileName,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    css::uno::Sequence< css::uno::Reference<css::deployment::XPackage> >
+    getDeployedPackages_(
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv );
+    virtual css::uno::Sequence< css::uno::Reference<css::deployment::XPackage> >
+    SAL_CALL getDeployedPackages(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL reinstallDeployedPackages(
+        sal_Bool force,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual ::sal_Bool SAL_CALL isReadOnly(  ) override;
+
+    virtual ::sal_Bool SAL_CALL synchronize(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual css::uno::Sequence<css::uno::Reference<css::deployment::XPackage> > SAL_CALL
+    getExtensionsWithUnacceptedLicenses(
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv) override;
+
+    virtual sal_Int32 SAL_CALL checkPrerequisites(
+        css::uno::Reference<css::deployment::XPackage> const & extension,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+        };
+
+
+inline void PackageManagerImpl::check()
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed)
+        throw css::lang::DisposedException(
+            "PackageManager instance has already been disposed!",
+            static_cast< ::cppu::OWeakObject * >(this) );
+}
+
+
+inline void PackageManagerImpl::logIntern( css::uno::Any const & status )
+{
+    if (m_xLogFile.is())
+        m_xLogFile->update( status );
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_managerfac.cxx b/desktop/source/deployment/manager/dp_managerfac.cxx
new file mode 100644
index 000000000..79e0ea358
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_managerfac.cxx
@@ -0,0 +1,186 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include "dp_manager.h"
+#include <dp_misc.h>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <com/sun/star/deployment/XPackageManagerFactory.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <unordered_map>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_manager::factory {
+
+typedef ::cppu::WeakComponentImplHelper<
+    deployment::XPackageManagerFactory, lang::XServiceInfo > t_pmfac_helper;
+
+namespace {
+
+class PackageManagerFactoryImpl : private cppu::BaseMutex, public t_pmfac_helper
+{
+    Reference<XComponentContext> m_xComponentContext;
+
+    Reference<deployment::XPackageManager> m_xUserMgr;
+    Reference<deployment::XPackageManager> m_xSharedMgr;
+    Reference<deployment::XPackageManager> m_xBundledMgr;
+    Reference<deployment::XPackageManager> m_xTmpMgr;
+    Reference<deployment::XPackageManager> m_xBakMgr;
+    typedef std::unordered_map<
+        OUString, WeakReference<deployment::XPackageManager> > t_string2weakref;
+    t_string2weakref m_managers;
+
+protected:
+    inline void check();
+    virtual void SAL_CALL disposing() override;
+
+public:
+    explicit PackageManagerFactoryImpl(
+        Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageManagerFactory
+    virtual Reference<deployment::XPackageManager> SAL_CALL getPackageManager(
+        OUString const & context ) override;
+};
+
+}
+
+PackageManagerFactoryImpl::PackageManagerFactoryImpl(
+    Reference<XComponentContext> const & xComponentContext )
+    : t_pmfac_helper( m_aMutex ),
+      m_xComponentContext( xComponentContext )
+{
+}
+
+// XServiceInfo
+OUString PackageManagerFactoryImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.PackageManagerFactory";
+}
+
+sal_Bool PackageManagerFactoryImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > PackageManagerFactoryImpl::getSupportedServiceNames()
+{
+    // a private one:
+    return { "com.sun.star.comp.deployment.PackageManagerFactory" };
+}
+
+inline void PackageManagerFactoryImpl::check()
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed)
+    {
+        throw lang::DisposedException(
+            "PackageManagerFactory instance has already been disposed!",
+            static_cast<OWeakObject *>(this) );
+    }
+}
+
+
+void PackageManagerFactoryImpl::disposing()
+{
+    // dispose all managers:
+    ::osl::MutexGuard guard( m_aMutex );
+    for (auto const& elem : m_managers)
+        try_dispose( elem.second );
+    m_managers = t_string2weakref();
+    // the below are already disposed:
+    m_xUserMgr.clear();
+    m_xSharedMgr.clear();
+    m_xBundledMgr.clear();
+    m_xTmpMgr.clear();
+    m_xBakMgr.clear();
+}
+
+// XPackageManagerFactory
+
+Reference<deployment::XPackageManager>
+PackageManagerFactoryImpl::getPackageManager( OUString const & context )
+{
+    Reference< deployment::XPackageManager > xRet;
+    ::osl::ResettableMutexGuard guard( m_aMutex );
+    check();
+    t_string2weakref::const_iterator const iFind( m_managers.find( context ) );
+    if (iFind != m_managers.end()) {
+        xRet = iFind->second;
+        if (xRet.is())
+            return xRet;
+    }
+
+    guard.clear();
+    xRet.set( PackageManagerImpl::create( m_xComponentContext, context ) );
+    guard.reset();
+    std::pair< t_string2weakref::iterator, bool > insertion(
+        m_managers.emplace( context, xRet ) );
+    if (insertion.second)
+    {
+        OSL_ASSERT( insertion.first->second.get() == xRet );
+        // hold user, shared mgrs for whole process: live deployment
+        if ( context == "user" )
+            m_xUserMgr = xRet;
+        else if ( context == "shared" )
+            m_xSharedMgr = xRet;
+        else if ( context == "bundled" )
+            m_xBundledMgr = xRet;
+        else if ( context == "tmp" )
+            m_xTmpMgr = xRet;
+        else if ( context == "bak" )
+            m_xBakMgr = xRet;
+    }
+    else
+    {
+        Reference< deployment::XPackageManager > xAlreadyIn(
+            insertion.first->second );
+        if (xAlreadyIn.is())
+        {
+            guard.clear();
+            try_dispose( xRet );
+            xRet = xAlreadyIn;
+        }
+        else
+        {
+            insertion.first->second = xRet;
+        }
+    }
+    return xRet;
+}
+
+} // namespace dp_manager::factory
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_PackageManagerFactory_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& )
+{
+    return cppu::acquire(new dp_manager::factory::PackageManagerFactoryImpl(context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_properties.cxx b/desktop/source/deployment/manager/dp_properties.cxx
new file mode 100644
index 000000000..b0d2245e8
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_properties.cxx
@@ -0,0 +1,145 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <xmlscript/xml_helper.hxx>
+#include <ucbhelper/content.hxx>
+
+#include <dp_ucb.h>
+#include "dp_properties.hxx"
+
+namespace lang  = com::sun::star::lang;
+namespace ucb = com::sun::star::ucb;
+namespace uno = com::sun::star::uno;
+
+
+using ::com::sun::star::uno::Reference;
+
+constexpr OUStringLiteral PROP_SUPPRESS_LICENSE = u"SUPPRESS_LICENSE";
+constexpr OUStringLiteral PROP_EXTENSION_UPDATE = u"EXTENSION_UPDATE";
+
+namespace dp_manager {
+
+//Reading the file
+ExtensionProperties::ExtensionProperties(
+    std::u16string_view urlExtension,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+    Reference<uno::XComponentContext> const & xContext) :
+    m_xCmdEnv(xCmdEnv), m_xContext(xContext)
+{
+    m_propFileUrl = OUString::Concat(urlExtension) + "properties";
+
+    std::vector< std::pair< OUString, OUString> > props;
+    if (! dp_misc::create_ucb_content(nullptr, m_propFileUrl, nullptr, false))
+        return;
+
+    ::ucbhelper::Content contentProps(m_propFileUrl, m_xCmdEnv, m_xContext);
+    dp_misc::readProperties(props, contentProps);
+
+    for (auto const& prop : props)
+    {
+        if (prop.first == PROP_SUPPRESS_LICENSE)
+            m_prop_suppress_license = prop.second;
+    }
+}
+
+//Writing the file
+ExtensionProperties::ExtensionProperties(
+    std::u16string_view urlExtension,
+    uno::Sequence<css::beans::NamedValue> const & properties,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+    Reference<uno::XComponentContext> const & xContext) :
+    m_xCmdEnv(xCmdEnv), m_xContext(xContext)
+{
+    m_propFileUrl = OUString::Concat(urlExtension) + "properties";
+
+    for (css::beans::NamedValue const & v : properties)
+    {
+        if (v.Name == PROP_SUPPRESS_LICENSE)
+        {
+            m_prop_suppress_license = getPropertyValue(v);
+        }
+        else if (v.Name == PROP_EXTENSION_UPDATE)
+        {
+            m_prop_extension_update = getPropertyValue(v);
+        }
+        else
+        {
+            throw lang::IllegalArgumentException(
+                "Extension Manager: unknown property", nullptr, -1);
+        }
+    }
+}
+
+OUString ExtensionProperties::getPropertyValue(css::beans::NamedValue const & v)
+{
+    OUString value("0");
+    if (! (v.Value >>= value) )
+    {
+        throw lang::IllegalArgumentException(
+            "Extension Manager: wrong property value", nullptr, -1);
+    }
+    return value;
+}
+void ExtensionProperties::write()
+{
+    ::ucbhelper::Content contentProps(m_propFileUrl, m_xCmdEnv, m_xContext);
+    OUString buf;
+
+    if (m_prop_suppress_license)
+    {
+        buf = OUString::Concat(PROP_SUPPRESS_LICENSE) + "=" + *m_prop_suppress_license;
+    }
+
+    OString stamp = OUStringToOString(buf, RTL_TEXTENCODING_UTF8);
+    Reference<css::io::XInputStream> xData(
+        ::xmlscript::createInputStream(
+                reinterpret_cast<sal_Int8 const *>(stamp.getStr()),
+                stamp.getLength() ) );
+    contentProps.writeStream( xData, true /* replace existing */ );
+}
+
+bool ExtensionProperties::isSuppressedLicense() const
+{
+    bool ret = false;
+    if (m_prop_suppress_license)
+    {
+        if (*m_prop_suppress_license == "1")
+            ret = true;
+    }
+    return ret;
+}
+
+bool ExtensionProperties::isExtensionUpdate() const
+{
+    bool ret = false;
+    if (m_prop_extension_update)
+    {
+        if (*m_prop_extension_update == "1")
+            ret = true;
+    }
+    return ret;
+}
+
+} // namespace dp_manager
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/manager/dp_properties.hxx b/desktop/source/deployment/manager/dp_properties.hxx
new file mode 100644
index 000000000..06139ece3
--- /dev/null
+++ b/desktop/source/deployment/manager/dp_properties.hxx
@@ -0,0 +1,58 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <optional>
+#include <string_view>
+
+namespace dp_manager
+{
+class ExtensionProperties final
+{
+    OUString m_propFileUrl;
+    const css::uno::Reference<css::ucb::XCommandEnvironment> m_xCmdEnv;
+    const css::uno::Reference<css::uno::XComponentContext> m_xContext;
+    ::std::optional<OUString> m_prop_suppress_license;
+    ::std::optional<OUString> m_prop_extension_update;
+
+    static OUString getPropertyValue(css::beans::NamedValue const& v);
+
+public:
+    ExtensionProperties(std::u16string_view urlExtension,
+                        css::uno::Reference<css::ucb::XCommandEnvironment> const& xCmdEnv,
+                        css::uno::Reference<css::uno::XComponentContext> const& xContext);
+
+    ExtensionProperties(std::u16string_view urlExtension,
+                        css::uno::Sequence<css::beans::NamedValue> const& properties,
+                        css::uno::Reference<css::ucb::XCommandEnvironment> const& xCmdEnv,
+                        css::uno::Reference<css::uno::XComponentContext> const& xContext);
+
+    void write();
+
+    bool isSuppressedLicense() const;
+
+    bool isExtensionUpdate() const;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_dependencies.cxx b/desktop/source/deployment/misc/dp_dependencies.cxx
new file mode 100644
index 000000000..e187a6974
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_dependencies.cxx
@@ -0,0 +1,196 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_folders.h>
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/xml/dom/XElement.hpp>
+#include <com/sun/star/xml/dom/XNodeList.hpp>
+#include <osl/diagnose.h>
+#include <rtl/bootstrap.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <unotools/configmgr.hxx>
+
+#include <strings.hrc>
+#include <dp_shared.hxx>
+
+#include <dp_dependencies.hxx>
+#include <dp_descriptioninfoset.hxx>
+#include <dp_version.hxx>
+
+namespace {
+
+char const namespaceLibreOffice[] =
+    "http://libreoffice.org/extensions/description/2011";
+
+constexpr OUStringLiteral namespaceOpenOfficeOrg =
+    u"http://openoffice.org/extensions/description/2006";
+
+char const minimalVersionLibreOffice[] = "LibreOffice-minimal-version";
+char const maximalVersionLibreOffice[] = "LibreOffice-maximal-version";
+
+constexpr OUStringLiteral minimalVersionOpenOfficeOrg =
+    u"OpenOffice.org-minimal-version";
+
+char const maximalVersionOpenOfficeOrg[] =
+    "OpenOffice.org-maximal-version";
+
+OUString getLibreOfficeMajorMinorMicro() {
+    return utl::ConfigManager::getAboutBoxProductVersion();
+}
+
+OUString getReferenceOpenOfficeOrgMajorMinor() {
+#ifdef ANDROID
+    // just hardcode the version
+    OUString v("4.1");
+#else
+    OUString v(
+            "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version")
+            ":Version:ReferenceOOoMajorMinor}");
+    rtl::Bootstrap::expandMacros(v); //TODO: check for failure
+#endif
+    return v;
+}
+
+bool satisfiesMinimalVersion(
+    OUString const & actual, OUString const & specified)
+{
+    return dp_misc::compareVersions(actual, specified) != dp_misc::LESS;
+}
+
+bool satisfiesMaximalVersion(
+    OUString const & actual, OUString const & specified)
+{
+    return dp_misc::compareVersions(actual, specified) != dp_misc::GREATER;
+}
+
+OUString produceErrorText(
+    OUString const & reason, OUString const & version)
+{
+    return reason.replaceFirst("%VERSION",
+        (version.isEmpty()
+         ?  DpResId(RID_DEPLOYMENT_DEPENDENCIES_UNKNOWN)
+         : version));
+}
+
+}
+
+namespace dp_misc::Dependencies {
+
+css::uno::Sequence< css::uno::Reference< css::xml::dom::XElement > >
+check(dp_misc::DescriptionInfoset const & infoset) {
+    css::uno::Reference< css::xml::dom::XNodeList > deps(
+        infoset.getDependencies());
+    sal_Int32 n = deps->getLength();
+    css::uno::Sequence< css::uno::Reference< css::xml::dom::XElement > >
+        unsatisfied(n);
+    auto unsatisfiedRange = asNonConstRange(unsatisfied);
+    sal_Int32 unsat = 0;
+    // check first if minimalVersionLibreOffice is specified -- in that case ignore the legacy OOo dependencies
+    bool bIgnoreOoo = false;
+    for (sal_Int32 i = 0; i < n; ++i) {
+        css::uno::Reference< css::xml::dom::XElement > e(
+            deps->item(i), css::uno::UNO_QUERY_THROW);
+        if ( e->getNamespaceURI() == namespaceLibreOffice && e->getTagName() == minimalVersionLibreOffice)
+        {
+            bIgnoreOoo = true;
+            break;
+        }
+    }
+    for (sal_Int32 i = 0; i < n; ++i) {
+        css::uno::Reference< css::xml::dom::XElement > e(
+            deps->item(i), css::uno::UNO_QUERY_THROW);
+        bool sat = false;
+        if ( e->getNamespaceURI() == namespaceOpenOfficeOrg && e->getTagName() == minimalVersionOpenOfficeOrg )
+        {
+            sat = bIgnoreOoo || satisfiesMinimalVersion(
+                getReferenceOpenOfficeOrgMajorMinor(),
+                e->getAttribute("value"));
+        } else if ( e->getNamespaceURI() == namespaceOpenOfficeOrg && e->getTagName() == maximalVersionOpenOfficeOrg )
+        {
+            sat = bIgnoreOoo || satisfiesMaximalVersion(
+                getReferenceOpenOfficeOrgMajorMinor(),
+                e->getAttribute("value"));
+        } else if (e->getNamespaceURI() == namespaceLibreOffice && e->getTagName() == minimalVersionLibreOffice )
+        {
+            sat = satisfiesMinimalVersion(
+                getLibreOfficeMajorMinorMicro(),
+                e->getAttribute("value"));
+        } else if (e->getNamespaceURI() == namespaceLibreOffice && e->getTagName() == maximalVersionLibreOffice )
+        {
+            sat = satisfiesMaximalVersion(getLibreOfficeMajorMinorMicro(), e->getAttribute("value"));
+        } else if (e->hasAttributeNS(namespaceOpenOfficeOrg,
+                       minimalVersionOpenOfficeOrg))
+        {
+            sat = satisfiesMinimalVersion(
+                getReferenceOpenOfficeOrgMajorMinor(),
+                e->getAttributeNS(namespaceOpenOfficeOrg,
+                    minimalVersionOpenOfficeOrg));
+        }
+        if (!sat) {
+            unsatisfiedRange[unsat++] = e;
+        }
+    }
+    unsatisfied.realloc(unsat);
+    return unsatisfied;
+}
+
+OUString getErrorText(
+    css::uno::Reference< css::xml::dom::XElement > const & dependency)
+{
+    OSL_ASSERT(dependency.is());
+    if ( dependency->getNamespaceURI() == namespaceOpenOfficeOrg && dependency->getTagName() == minimalVersionOpenOfficeOrg )
+    {
+        return produceErrorText(
+                DpResId(RID_DEPLOYMENT_DEPENDENCIES_OOO_MIN),
+            dependency->getAttribute("value"));
+    } else if (dependency->getNamespaceURI() == namespaceOpenOfficeOrg && dependency->getTagName() == maximalVersionOpenOfficeOrg )
+    {
+        return produceErrorText(
+                DpResId(RID_DEPLOYMENT_DEPENDENCIES_OOO_MAX),
+            dependency->getAttribute("value"));
+    } else if (dependency->getNamespaceURI() == namespaceLibreOffice && dependency->getTagName() == minimalVersionLibreOffice )
+    {
+        return produceErrorText(
+                DpResId(RID_DEPLOYMENT_DEPENDENCIES_LO_MIN),
+            dependency->getAttribute("value"));
+    } else if (dependency->getNamespaceURI() == namespaceLibreOffice && dependency->getTagName() == maximalVersionLibreOffice )
+    {
+        return produceErrorText(
+                DpResId(RID_DEPLOYMENT_DEPENDENCIES_LO_MAX),
+            dependency->getAttribute("value"));
+    } else if (dependency->hasAttributeNS(namespaceOpenOfficeOrg,
+                   minimalVersionOpenOfficeOrg))
+    {
+        return produceErrorText(
+                DpResId(RID_DEPLOYMENT_DEPENDENCIES_OOO_MIN),
+            dependency->getAttributeNS(namespaceOpenOfficeOrg,
+                minimalVersionOpenOfficeOrg));
+    } else {
+        return DpResId(RID_DEPLOYMENT_DEPENDENCIES_UNKNOWN);
+    }
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_descriptioninfoset.cxx b/desktop/source/deployment/misc/dp_descriptioninfoset.cxx
new file mode 100644
index 000000000..00b32c04f
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_descriptioninfoset.cxx
@@ -0,0 +1,809 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <dp_descriptioninfoset.hxx>
+
+#include <dp_resource.h>
+
+#include <comphelper/sequence.hxx>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/propertysequence.hxx>
+#include <optional>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/io/SequenceInputStream.hpp>
+#include <com/sun/star/lang/XMultiComponentFactory.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/ucb/XProgressHandler.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <com/sun/star/xml/dom/DOMException.hpp>
+#include <com/sun/star/xml/dom/XNode.hpp>
+#include <com/sun/star/xml/dom/XNodeList.hpp>
+#include <com/sun/star/xml/dom/DocumentBuilder.hpp>
+#include <com/sun/star/xml/xpath/XPathAPI.hpp>
+#include <com/sun/star/xml/xpath/XPathException.hpp>
+#include <com/sun/star/ucb/InteractiveIOException.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/weak.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <ucbhelper/content.hxx>
+#include <o3tl/string_view.hxx>
+
+namespace {
+
+using css::uno::Reference;
+
+class EmptyNodeList:
+    public cppu::WeakImplHelper<css::xml::dom::XNodeList>
+{
+public:
+    EmptyNodeList();
+
+    EmptyNodeList(const EmptyNodeList&) = delete;
+    const EmptyNodeList& operator=(const EmptyNodeList&) = delete;
+
+    virtual ::sal_Int32 SAL_CALL getLength() override;
+
+    virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL
+    item(::sal_Int32 index) override;
+};
+
+EmptyNodeList::EmptyNodeList() {}
+
+::sal_Int32 EmptyNodeList::getLength() {
+    return 0;
+}
+
+css::uno::Reference< css::xml::dom::XNode > EmptyNodeList::item(::sal_Int32)
+{
+    throw css::uno::RuntimeException("bad EmptyNodeList com.sun.star.xml.dom.XNodeList.item call",
+        static_cast< ::cppu::OWeakObject * >(this));
+}
+
+OUString getNodeValue(
+    css::uno::Reference< css::xml::dom::XNode > const & node)
+{
+    OSL_ASSERT(node.is());
+    try {
+        return node->getNodeValue();
+    } catch (const css::xml::dom::DOMException & e) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw css::lang::WrappedTargetRuntimeException(
+            "com.sun.star.xml.dom.DOMException: " + e.Message,
+            nullptr, anyEx );
+    }
+}
+
+/**The class uses the UCB to access the description.xml file in an
+   extension. The UCB must have been initialized already. It also
+   requires that the extension has already be unzipped to a particular
+   location.
+ */
+class ExtensionDescription
+{
+public:
+    /**throws an exception if the description.xml is not
+        available, cannot be read, does not contain the expected data,
+        or any other error occurred. Therefore it should only be used with
+        new extensions.
+
+        Throws css::uno::RuntimeException,
+        css::deployment::DeploymentException,
+        dp_registry::backend::bundle::NoDescriptionException.
+     */
+    ExtensionDescription(
+        const css::uno::Reference<css::uno::XComponentContext>& xContext,
+        std::u16string_view installDir,
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv);
+
+    const css::uno::Reference<css::xml::dom::XNode>& getRootElement() const
+    {
+        return m_xRoot;
+    }
+
+private:
+    css::uno::Reference<css::xml::dom::XNode> m_xRoot;
+};
+
+class NoDescriptionException
+{
+};
+
+class FileDoesNotExistFilter
+    : public ::cppu::WeakImplHelper< css::ucb::XCommandEnvironment,
+                                      css::task::XInteractionHandler >
+
+{
+    bool m_bExist;
+    css::uno::Reference< css::ucb::XCommandEnvironment > m_xCommandEnv;
+
+public:
+    explicit FileDoesNotExistFilter(
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv);
+
+    bool exist() { return m_bExist;}
+    // XCommandEnvironment
+    virtual css::uno::Reference<css::task::XInteractionHandler > SAL_CALL
+    getInteractionHandler() override;
+    virtual css::uno::Reference<css::ucb::XProgressHandler >
+    SAL_CALL getProgressHandler() override;
+
+    // XInteractionHandler
+    virtual void SAL_CALL handle(
+        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;
+};
+
+ExtensionDescription::ExtensionDescription(
+    const Reference<css::uno::XComponentContext>& xContext,
+    std::u16string_view installDir,
+    const Reference< css::ucb::XCommandEnvironment >& xCmdEnv)
+{
+    try {
+        //may throw css::ucb::ContentCreationException
+        //If there is no description.xml then ucb will start an interaction which
+        //brings up a dialog.We want to prevent this. Therefore we wrap the xCmdEnv
+        //and filter the respective exception out.
+        OUString sDescriptionUri(OUString::Concat(installDir) + "/description.xml");
+        Reference<css::ucb::XCommandEnvironment> xFilter = new FileDoesNotExistFilter(xCmdEnv);
+        ::ucbhelper::Content descContent(sDescriptionUri, xFilter, xContext);
+
+        //throws a css::uno::Exception if the file is not available
+        Reference<css::io::XInputStream> xIn;
+        try
+        {   //throws com.sun.star.ucb.InteractiveIOException
+            xIn = descContent.openStream();
+        }
+        catch ( const css::uno::Exception& )
+        {
+            if ( ! static_cast<FileDoesNotExistFilter*>(xFilter.get())->exist())
+                throw NoDescriptionException();
+            throw;
+        }
+        if (!xIn.is())
+        {
+            throw css::uno::Exception(
+                "Could not get XInputStream for description.xml of extension " +
+                sDescriptionUri, nullptr);
+        }
+
+        //get root node of description.xml
+        Reference<css::xml::dom::XDocumentBuilder> xDocBuilder(
+            css::xml::dom::DocumentBuilder::create(xContext) );
+
+        if (!xDocBuilder->isNamespaceAware())
+        {
+            throw css::uno::Exception(
+                "Service com.sun.star.xml.dom.DocumentBuilder is not namespace aware.", nullptr);
+        }
+
+        Reference<css::xml::dom::XDocument> xDoc = xDocBuilder->parse(xIn);
+        if (!xDoc.is())
+        {
+            throw css::uno::Exception(sDescriptionUri + " contains data which cannot be parsed. ", nullptr);
+        }
+
+        //check for proper root element and namespace
+        Reference<css::xml::dom::XElement> xRoot = xDoc->getDocumentElement();
+        if (!xRoot.is())
+        {
+            throw css::uno::Exception(
+                sDescriptionUri + " contains no root element.", nullptr);
+        }
+
+        if ( xRoot->getTagName() != "description")
+        {
+            throw css::uno::Exception(
+                sDescriptionUri + " does not contain the root element <description>.", nullptr);
+        }
+
+        m_xRoot.set(xRoot, css::uno::UNO_QUERY_THROW);
+        OUString nsDescription = xRoot->getNamespaceURI();
+
+        //check if this namespace is supported
+        if ( nsDescription != "http://openoffice.org/extensions/description/2006")
+        {
+            throw css::uno::Exception(sDescriptionUri + " contains a root element with an unsupported namespace. ", nullptr);
+        }
+    } catch (const css::uno::RuntimeException &) {
+        throw;
+    } catch (const css::deployment::DeploymentException &) {
+        throw;
+    } catch (const css::uno::Exception & e) {
+        css::uno::Any a(cppu::getCaughtException());
+        throw css::deployment::DeploymentException(
+            e.Message, Reference< css::uno::XInterface >(), a);
+    }
+}
+
+FileDoesNotExistFilter::FileDoesNotExistFilter(
+    const Reference< css::ucb::XCommandEnvironment >& xCmdEnv):
+    m_bExist(true), m_xCommandEnv(xCmdEnv)
+{}
+
+    // XCommandEnvironment
+Reference<css::task::XInteractionHandler >
+    FileDoesNotExistFilter::getInteractionHandler()
+{
+    return static_cast<css::task::XInteractionHandler*>(this);
+}
+
+Reference<css::ucb::XProgressHandler >
+    FileDoesNotExistFilter::getProgressHandler()
+{
+    return m_xCommandEnv.is()
+        ? m_xCommandEnv->getProgressHandler()
+        : Reference<css::ucb::XProgressHandler>();
+}
+
+// XInteractionHandler
+//If the interaction was caused by a non-existing file which is specified in the ctor
+//of FileDoesNotExistFilter, then we do nothing
+void  FileDoesNotExistFilter::handle(
+        Reference<css::task::XInteractionRequest > const & xRequest )
+{
+    css::uno::Any request( xRequest->getRequest() );
+
+    css::ucb::InteractiveIOException ioexc;
+    if ((request>>= ioexc)
+        && (ioexc.Code == css::ucb::IOErrorCode_NOT_EXISTING
+            || ioexc.Code == css::ucb::IOErrorCode_NOT_EXISTING_PATH))
+    {
+        m_bExist = false;
+        return;
+    }
+    Reference<css::task::XInteractionHandler> xInteraction;
+    if (m_xCommandEnv.is()) {
+        xInteraction = m_xCommandEnv->getInteractionHandler();
+    }
+    if (xInteraction.is()) {
+        xInteraction->handle(xRequest);
+    }
+}
+
+}
+
+namespace dp_misc {
+
+DescriptionInfoset getDescriptionInfoset(std::u16string_view sExtensionFolderURL)
+{
+    Reference< css::xml::dom::XNode > root;
+    Reference<css::uno::XComponentContext> context(
+        comphelper::getProcessComponentContext());
+    try {
+        root =
+            ExtensionDescription(
+                context, sExtensionFolderURL,
+                Reference< css::ucb::XCommandEnvironment >()).
+            getRootElement();
+    } catch (const NoDescriptionException &) {
+    } catch (const css::deployment::DeploymentException & e) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw css::lang::WrappedTargetRuntimeException(
+            "com.sun.star.deployment.DeploymentException: " + e.Message,
+            nullptr, anyEx );
+    }
+    return DescriptionInfoset(context, root);
+}
+
+DescriptionInfoset::DescriptionInfoset(
+    css::uno::Reference< css::uno::XComponentContext > const & context,
+    css::uno::Reference< css::xml::dom::XNode > const & element):
+    m_context(context),
+    m_element(element)
+{
+    if (m_element.is()) {
+        m_xpath = css::xml::xpath::XPathAPI::create(context);
+        m_xpath->registerNS("desc", element->getNamespaceURI());
+        m_xpath->registerNS("xlink", "http://www.w3.org/1999/xlink");
+    }
+}
+
+DescriptionInfoset::~DescriptionInfoset() {}
+
+::std::optional< OUString > DescriptionInfoset::getIdentifier() const {
+    return getOptionalValue("desc:identifier/@value");
+}
+
+OUString DescriptionInfoset::getNodeValueFromExpression(OUString const & expression) const
+{
+    css::uno::Reference< css::xml::dom::XNode > n;
+    if (m_element.is()) {
+        try {
+            n = m_xpath->selectSingleNode(m_element, expression);
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+    }
+    return n.is() ? getNodeValue(n) : OUString();
+}
+
+void DescriptionInfoset::checkDenylist() const
+{
+    if (!m_element.is())
+        return;
+
+    std::optional< OUString > id(getIdentifier());
+    if (!id)
+        return; // nothing to check
+    OUString currentversion(getVersion());
+    if (currentversion.getLength() == 0)
+        return;  // nothing to check
+
+    css::uno::Sequence<css::uno::Any> args(comphelper::InitAnyPropertySequence(
+    {
+        {"nodepath", css::uno::Any(OUString("/org.openoffice.Office.ExtensionDependencies/Extensions"))}
+    }));
+    css::uno::Reference< css::container::XNameAccess > denylist(
+        (css::configuration::theDefaultProvider::get(m_context)
+         ->createInstanceWithArguments(
+             "com.sun.star.configuration.ConfigurationAccess", args)),
+        css::uno::UNO_QUERY_THROW);
+
+    // check first if a denylist entry is available
+    if (!(denylist.is() && denylist->hasByName(*id)))        return;
+
+    css::uno::Reference< css::beans::XPropertySet > extProps(
+        denylist->getByName(*id), css::uno::UNO_QUERY_THROW);
+
+    css::uno::Any anyValue = extProps->getPropertyValue("Versions");
+
+    css::uno::Sequence< OUString > blversions;
+    anyValue >>= blversions;
+
+    // check if the current version requires further dependency checks from the denylist
+    if (!checkDenylistVersion(currentversion, blversions))        return;
+
+    anyValue = extProps->getPropertyValue("Dependencies");
+    OUString udeps;
+    anyValue >>= udeps;
+
+    if (udeps.getLength() == 0)
+        return; // nothing todo
+
+    OString xmlDependencies = OUStringToOString(udeps, RTL_TEXTENCODING_UNICODE);
+
+    css::uno::Reference< css::xml::dom::XDocumentBuilder> docbuilder(
+        m_context->getServiceManager()->createInstanceWithContext("com.sun.star.xml.dom.DocumentBuilder", m_context),
+        css::uno::UNO_QUERY_THROW);
+
+    css::uno::Sequence< sal_Int8 > byteSeq(reinterpret_cast<const sal_Int8*>(xmlDependencies.getStr()), xmlDependencies.getLength());
+
+    css::uno::Reference< css::io::XInputStream> inputstream( css::io::SequenceInputStream::createStreamFromSequence(m_context, byteSeq),
+                                                             css::uno::UNO_QUERY_THROW);
+
+    css::uno::Reference< css::xml::dom::XDocument > xDocument(docbuilder->parse(inputstream));
+    css::uno::Reference< css::xml::dom::XElement > xElement(xDocument->getDocumentElement());
+    css::uno::Reference< css::xml::dom::XNodeList > xDeps(xElement->getChildNodes());
+    sal_Int32 nLen = xDeps->getLength();
+
+    // get the parent xml document  of current description info for the import
+    css::uno::Reference< css::xml::dom::XDocument > xCurrentDescInfo(m_element->getOwnerDocument());
+
+    // get dependency node of current description info to merge the new dependencies from the denylist
+    css::uno::Reference< css::xml::dom::XNode > xCurrentDeps(
+        m_xpath->selectSingleNode(m_element, "desc:dependencies"));
+
+    // if no dependency node exists, create a new one in the current description info
+    if (!xCurrentDeps.is()) {
+        css::uno::Reference< css::xml::dom::XNode > xNewDepNode(
+            xCurrentDescInfo->createElementNS(
+                "http://openoffice.org/extensions/description/2006",
+                "dependencies"), css::uno::UNO_QUERY_THROW);
+        m_element->appendChild(xNewDepNode);
+        xCurrentDeps = m_xpath->selectSingleNode(m_element, "desc:dependencies");
+    }
+
+    for (sal_Int32 i=0; i<nLen; i++) {
+        css::uno::Reference< css::xml::dom::XNode > xNode(xDeps->item(i));
+        css::uno::Reference< css::xml::dom::XElement > xDep(xNode, css::uno::UNO_QUERY);
+        if (xDep.is()) {
+            // found valid denylist dependency, import the node first and append it to the existing dependency node
+            css::uno::Reference< css::xml::dom::XNode > importedNode = xCurrentDescInfo->importNode(xNode, true);
+            xCurrentDeps->appendChild(importedNode);
+        }
+    }
+}
+
+bool DescriptionInfoset::checkDenylistVersion(
+    std::u16string_view currentversion,
+    css::uno::Sequence< OUString > const & versions)
+{
+    sal_Int32 nLen = versions.getLength();
+    for (sal_Int32 i=0; i<nLen; i++) {
+        if (currentversion == versions[i])
+            return true;
+    }
+
+    return false;
+}
+
+OUString DescriptionInfoset::getVersion() const
+{
+    return getNodeValueFromExpression( "desc:version/@value" );
+}
+
+css::uno::Sequence< OUString > DescriptionInfoset::getSupportedPlatforms() const
+{
+    //When there is no description.xml then we assume that we support all platforms
+    if (! m_element.is())
+    {
+        return { OUString("all") };
+    }
+
+    //Check if the <platform> element was provided. If not the default is "all" platforms
+    css::uno::Reference< css::xml::dom::XNode > nodePlatform(
+        m_xpath->selectSingleNode(m_element, "desc:platform"));
+    if (!nodePlatform.is())
+    {
+        return { OUString("all") };
+    }
+
+    //There is a platform element.
+    const OUString value = getNodeValueFromExpression("desc:platform/@value");
+    //parse the string, it can contained multiple strings separated by commas
+    std::vector< OUString> vec;
+    sal_Int32 nIndex = 0;
+    do
+    {
+        const OUString aToken( o3tl::trim(o3tl::getToken(value, 0, ',', nIndex )) );
+        if (!aToken.isEmpty())
+            vec.push_back(aToken);
+
+    }
+    while (nIndex >= 0);
+
+    return comphelper::containerToSequence(vec);
+}
+
+css::uno::Reference< css::xml::dom::XNodeList >
+DescriptionInfoset::getDependencies() const {
+    if (m_element.is()) {
+        try {
+            // check the extension denylist first and expand the dependencies if applicable
+            checkDenylist();
+
+            return m_xpath->selectNodeList(m_element, "desc:dependencies/*");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+    }
+    return new EmptyNodeList;
+}
+
+css::uno::Sequence< OUString >
+DescriptionInfoset::getUpdateInformationUrls() const {
+    return getUrls("desc:update-information/desc:src/@xlink:href");
+}
+
+css::uno::Sequence< OUString >
+DescriptionInfoset::getUpdateDownloadUrls() const
+{
+    return getUrls("desc:update-download/desc:src/@xlink:href");
+}
+
+OUString DescriptionInfoset::getIconURL( bool bHighContrast ) const
+{
+    css::uno::Sequence< OUString > aStrList = getUrls( "desc:icon/desc:default/@xlink:href" );
+    css::uno::Sequence< OUString > aStrListHC = getUrls( "desc:icon/desc:high-contrast/@xlink:href" );
+
+    if ( bHighContrast && aStrListHC.hasElements() && !aStrListHC[0].isEmpty() )
+        return aStrListHC[0];
+
+    if ( aStrList.hasElements() && !aStrList[0].isEmpty() )
+        return aStrList[0];
+
+    return OUString();
+}
+
+::std::optional< OUString > DescriptionInfoset::getLocalizedUpdateWebsiteURL()
+    const
+{
+    bool bParentExists = false;
+    const OUString sURL (getLocalizedHREFAttrFromChild("/desc:description/desc:update-website", &bParentExists ));
+
+    if (!sURL.isEmpty())
+        return ::std::optional< OUString >(sURL);
+    else
+        return bParentExists ? ::std::optional< OUString >(OUString()) :
+            ::std::optional< OUString >();
+}
+
+::std::optional< OUString > DescriptionInfoset::getOptionalValue(
+    OUString const & expression) const
+{
+    css::uno::Reference< css::xml::dom::XNode > n;
+    if (m_element.is()) {
+        try {
+            n = m_xpath->selectSingleNode(m_element, expression);
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+    }
+    return n.is()
+        ? ::std::optional< OUString >(getNodeValue(n))
+        : ::std::optional< OUString >();
+}
+
+css::uno::Sequence< OUString > DescriptionInfoset::getUrls(
+    OUString const & expression) const
+{
+    css::uno::Reference< css::xml::dom::XNodeList > ns;
+    if (m_element.is()) {
+        try {
+            ns = m_xpath->selectNodeList(m_element, expression);
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+    }
+    css::uno::Sequence< OUString > urls(ns.is() ? ns->getLength() : 0);
+    auto urlsRange = asNonConstRange(urls);
+    for (::sal_Int32 i = 0; i < urls.getLength(); ++i) {
+        urlsRange[i] = getNodeValue(ns->item(i));
+    }
+    return urls;
+}
+
+std::pair< OUString, OUString > DescriptionInfoset::getLocalizedPublisherNameAndURL() const
+{
+    css::uno::Reference< css::xml::dom::XNode > node =
+        getLocalizedChild("desc:publisher");
+
+    OUString sPublisherName;
+    OUString sURL;
+    if (node.is())
+    {
+        css::uno::Reference< css::xml::dom::XNode > xPathName;
+        try {
+            xPathName = m_xpath->selectSingleNode(node, "text()");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        OSL_ASSERT(xPathName.is());
+        if (xPathName.is())
+            sPublisherName = xPathName->getNodeValue();
+
+        css::uno::Reference< css::xml::dom::XNode > xURL;
+        try {
+            xURL = m_xpath->selectSingleNode(node, "@xlink:href");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        OSL_ASSERT(xURL.is());
+        if (xURL.is())
+           sURL = xURL->getNodeValue();
+    }
+    return std::make_pair(sPublisherName, sURL);
+}
+
+OUString DescriptionInfoset::getLocalizedReleaseNotesURL() const
+{
+    return getLocalizedHREFAttrFromChild("/desc:description/desc:release-notes", nullptr);
+}
+
+OUString DescriptionInfoset::getLocalizedDisplayName() const
+{
+    css::uno::Reference< css::xml::dom::XNode > node =
+        getLocalizedChild("desc:display-name");
+    if (node.is())
+    {
+        css::uno::Reference< css::xml::dom::XNode > xtext;
+        try {
+            xtext = m_xpath->selectSingleNode(node, "text()");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        if (xtext.is())
+            return xtext->getNodeValue();
+    }
+    return OUString();
+}
+
+OUString DescriptionInfoset::getLocalizedLicenseURL() const
+{
+    return getLocalizedHREFAttrFromChild("/desc:description/desc:registration/desc:simple-license", nullptr);
+
+}
+
+::std::optional<SimpleLicenseAttributes>
+DescriptionInfoset::getSimpleLicenseAttributes() const
+{
+    //Check if the node exist
+    css::uno::Reference< css::xml::dom::XNode > n;
+    if (m_element.is()) {
+        try {
+            n = m_xpath->selectSingleNode(m_element, "/desc:description/desc:registration/desc:simple-license/@accept-by");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        if (n.is())
+        {
+            SimpleLicenseAttributes attributes;
+            attributes.acceptBy =
+                getNodeValueFromExpression("/desc:description/desc:registration/desc:simple-license/@accept-by");
+
+            ::std::optional< OUString > suppressOnUpdate = getOptionalValue("/desc:description/desc:registration/desc:simple-license/@suppress-on-update");
+            if (suppressOnUpdate)
+                attributes.suppressOnUpdate = o3tl::equalsIgnoreAsciiCase(o3tl::trim(*suppressOnUpdate), u"true");
+            else
+                attributes.suppressOnUpdate = false;
+
+            ::std::optional< OUString > suppressIfRequired = getOptionalValue("/desc:description/desc:registration/desc:simple-license/@suppress-if-required");
+            if (suppressIfRequired)
+                attributes.suppressIfRequired = o3tl::equalsIgnoreAsciiCase(o3tl::trim(*suppressIfRequired), u"true");
+            else
+                attributes.suppressIfRequired = false;
+
+            return ::std::optional<SimpleLicenseAttributes>(attributes);
+        }
+    }
+    return ::std::optional<SimpleLicenseAttributes>();
+}
+
+OUString DescriptionInfoset::getLocalizedDescriptionURL() const
+{
+    return getLocalizedHREFAttrFromChild("/desc:description/desc:extension-description", nullptr);
+}
+
+css::uno::Reference< css::xml::dom::XNode >
+DescriptionInfoset::getLocalizedChild( const OUString & sParent) const
+{
+    if ( ! m_element.is() || sParent.isEmpty())
+        return css::uno::Reference< css::xml::dom::XNode > ();
+
+    css::uno::Reference< css::xml::dom::XNode > xParent;
+    try {
+        xParent = m_xpath->selectSingleNode(m_element, sParent);
+    } catch (const css::xml::xpath::XPathException &) {
+        // ignore
+    }
+    css::uno::Reference<css::xml::dom::XNode> nodeMatch;
+    if (xParent.is())
+    {
+        nodeMatch = matchLanguageTag(xParent, getOfficeLanguageTag().getBcp47());
+
+        //office: en-DE, en, en-DE-altmark
+        if (! nodeMatch.is())
+        {
+            // Already tried full tag, continue with first fallback.
+            const std::vector< OUString > aFallbacks( getOfficeLanguageTag().getFallbackStrings( false));
+            for (auto const& fallback : aFallbacks)
+            {
+                nodeMatch = matchLanguageTag(xParent, fallback);
+                if (nodeMatch.is())
+                    break;
+            }
+            if (! nodeMatch.is())
+                nodeMatch = getChildWithDefaultLocale(xParent);
+        }
+    }
+
+    return nodeMatch;
+}
+
+css::uno::Reference<css::xml::dom::XNode>
+DescriptionInfoset::matchLanguageTag(
+    css::uno::Reference< css::xml::dom::XNode > const & xParent, std::u16string_view rTag) const
+{
+    OSL_ASSERT(xParent.is());
+    css::uno::Reference<css::xml::dom::XNode> nodeMatch;
+
+    //first try exact match for lang
+    const OUString exp1(OUString::Concat("*[@lang=\"") + rTag + "\"]");
+    try {
+        nodeMatch = m_xpath->selectSingleNode(xParent, exp1);
+    } catch (const css::xml::xpath::XPathException &) {
+        // ignore
+    }
+
+    //try to match in strings that also have a country and/or variant, for
+    //example en  matches in en-US-montana, en-US, en-montana
+    if (!nodeMatch.is())
+    {
+        const OUString exp2(
+            OUString::Concat("*[starts-with(@lang,\"") + rTag + "-\")]");
+        try {
+            nodeMatch = m_xpath->selectSingleNode(xParent, exp2);
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+    }
+    return nodeMatch;
+}
+
+css::uno::Reference<css::xml::dom::XNode>
+DescriptionInfoset::getChildWithDefaultLocale(css::uno::Reference< css::xml::dom::XNode >
+                                    const & xParent) const
+{
+    OSL_ASSERT(xParent.is());
+    if ( xParent->getNodeName() == "simple-license" )
+    {
+        css::uno::Reference<css::xml::dom::XNode> nodeDefault;
+        try {
+            nodeDefault = m_xpath->selectSingleNode(xParent, "@default-license-id");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        if (nodeDefault.is())
+        {
+            //The old way
+            const OUString exp1("desc:license-text[@license-id = \""
+                + nodeDefault->getNodeValue()
+                + "\"]");
+            try {
+                return m_xpath->selectSingleNode(xParent, exp1);
+            } catch (const css::xml::xpath::XPathException &) {
+                // ignore
+            }
+        }
+    }
+
+    try {
+        return m_xpath->selectSingleNode(xParent, "*[1]");
+    } catch (const css::xml::xpath::XPathException &) {
+        // ignore
+        return nullptr;
+    }
+}
+
+OUString DescriptionInfoset::getLocalizedHREFAttrFromChild(
+    OUString const & sXPathParent, bool * out_bParentExists)
+    const
+{
+    css::uno::Reference< css::xml::dom::XNode > node =
+        getLocalizedChild(sXPathParent);
+
+    OUString sURL;
+    if (node.is())
+    {
+        if (out_bParentExists)
+            *out_bParentExists = true;
+        css::uno::Reference< css::xml::dom::XNode > xURL;
+        try {
+            xURL = m_xpath->selectSingleNode(node, "@xlink:href");
+        } catch (const css::xml::xpath::XPathException &) {
+            // ignore
+        }
+        OSL_ASSERT(xURL.is());
+        if (xURL.is())
+            sURL = xURL->getNodeValue();
+    }
+    else
+    {
+        if (out_bParentExists)
+            *out_bParentExists = false;
+    }
+    return sURL;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_identifier.cxx b/desktop/source/deployment/misc/dp_identifier.cxx
new file mode 100644
index 000000000..8669710c7
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_identifier.cxx
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <sal/config.h>
+
+#include <optional>
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <osl/diagnose.h>
+#include <rtl/ustring.hxx>
+
+#include <dp_identifier.hxx>
+
+namespace dp_misc {
+
+OUString generateIdentifier(
+    ::std::optional< OUString > const & optional,
+    std::u16string_view fileName)
+{
+    return optional ? *optional : generateLegacyIdentifier(fileName);
+}
+
+OUString getIdentifier(
+    css::uno::Reference< css::deployment::XPackage > const & package)
+{
+    OSL_ASSERT(package.is());
+    css::beans::Optional< OUString > id(package->getIdentifier());
+    return id.IsPresent
+        ? id.Value : generateLegacyIdentifier(package->getName());
+}
+
+OUString generateLegacyIdentifier(std::u16string_view fileName) {
+    return OUString::Concat("org.openoffice.legacy.") + fileName;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_interact.cxx b/desktop/source/deployment/misc/dp_interact.cxx
new file mode 100644
index 000000000..ae928a28e
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_interact.cxx
@@ -0,0 +1,137 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <dp_interact.h>
+
+#include <comphelper/interaction.hxx>
+
+#include <com/sun/star/task/XInteractionAbort.hpp>
+#include <osl/diagnose.h>
+
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_misc {
+namespace {
+
+
+class InteractionContinuationImpl : public ::cppu::OWeakObject,
+                                    public task::XInteractionContinuation
+{
+    const Type m_type;
+    bool * m_pselect;
+
+public:
+    InteractionContinuationImpl( Type const & type, bool * pselect )
+        : m_type( type ),
+          m_pselect( pselect )
+        { OSL_ASSERT(
+            cppu::UnoType<task::XInteractionContinuation>::get().isAssignableFrom(m_type) ); }
+
+    // XInterface
+    virtual void SAL_CALL acquire() noexcept override;
+    virtual void SAL_CALL release() noexcept override;
+    virtual Any SAL_CALL queryInterface( Type const & type ) override;
+
+    // XInteractionContinuation
+    virtual void SAL_CALL select() override;
+};
+
+// XInterface
+
+void InteractionContinuationImpl::acquire() noexcept
+{
+    OWeakObject::acquire();
+}
+
+
+void InteractionContinuationImpl::release() noexcept
+{
+    OWeakObject::release();
+}
+
+
+Any InteractionContinuationImpl::queryInterface( Type const & type )
+{
+    if (type.isAssignableFrom( m_type )) {
+        Reference<task::XInteractionContinuation> xThis(this);
+        return Any( &xThis, type );
+    }
+    else
+        return OWeakObject::queryInterface(type);
+}
+
+// XInteractionContinuation
+
+void InteractionContinuationImpl::select()
+{
+    *m_pselect = true;
+}
+
+} // anon namespace
+
+
+bool interactContinuation( Any const & request,
+                           Type const & continuation,
+                           Reference<XCommandEnvironment> const & xCmdEnv,
+                           bool * pcont, bool * pabort )
+{
+    OSL_ASSERT(
+        cppu::UnoType<task::XInteractionContinuation>::get().isAssignableFrom(
+            continuation ) );
+    if (!xCmdEnv)
+        return false;
+
+    Reference<task::XInteractionHandler> xInteractionHandler(
+        xCmdEnv->getInteractionHandler() );
+    if (!xInteractionHandler)
+        return false;
+
+    bool cont = false;
+    bool abort = false;
+    std::vector< Reference<task::XInteractionContinuation> > conts {
+        new InteractionContinuationImpl(continuation, &cont ),
+        new InteractionContinuationImpl( cppu::UnoType<task::XInteractionAbort>::get(), &abort ) };
+    xInteractionHandler->handle(
+        new ::comphelper::OInteractionRequest( request, std::move(conts) ) );
+    if (cont || abort) {
+        if (pcont != nullptr)
+            *pcont = cont;
+        if (pabort != nullptr)
+            *pabort = abort;
+        return true;
+    }
+    return false;
+}
+
+// XAbortChannel
+
+void AbortChannel::sendAbort()
+{
+    m_aborted = true;
+    if (m_xNext.is())
+        m_xNext->sendAbort();
+}
+
+} // dp_misc
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_misc.cxx b/desktop/source/deployment/misc/dp_misc.cxx
new file mode 100644
index 000000000..f4437711d
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_misc.cxx
@@ -0,0 +1,561 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_folders.h>
+#include <config_features.h>
+#include <chrono>
+
+#include <dp_misc.h>
+#include <dp_interact.h>
+#include <dp_shared.hxx>
+#include <rtl/uri.hxx>
+#include <rtl/digest.h>
+#include <rtl/random.h>
+#include <rtl/bootstrap.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <sal/log.hxx>
+#include <unotools/bootstrap.hxx>
+#include <osl/file.hxx>
+#include <osl/pipe.hxx>
+#include <osl/security.hxx>
+#include <osl/thread.hxx>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/bridge/BridgeFactory.hpp>
+#include <com/sun/star/bridge/UnoUrlResolver.hpp>
+#include <com/sun/star/bridge/XUnoUrlResolver.hpp>
+#include <com/sun/star/deployment/ExtensionManager.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/task/OfficeRestartManager.hpp>
+#include <memory>
+#include <string_view>
+#include <comphelper/lok.hxx>
+#include <comphelper/processfactory.hxx>
+#include <salhelper/linkhelper.hxx>
+
+#ifdef _WIN32
+#include <prewin.h>
+#include <postwin.h>
+#endif
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_misc {
+namespace {
+
+struct UnoRc : public rtl::StaticWithInit<
+    std::shared_ptr<rtl::Bootstrap>, UnoRc> {
+    std::shared_ptr<rtl::Bootstrap> operator () () {
+        OUString unorc( "$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("louno") );
+        ::rtl::Bootstrap::expandMacros( unorc );
+        auto ret = std::make_shared<::rtl::Bootstrap>( unorc );
+        OSL_ASSERT( ret->getHandle() != nullptr );
+        return ret;
+    }
+};
+
+OUString generateOfficePipeId()
+{
+    OUString userPath;
+    ::utl::Bootstrap::PathStatus aLocateResult =
+    ::utl::Bootstrap::locateUserInstallation( userPath );
+    if (aLocateResult != ::utl::Bootstrap::PATH_EXISTS &&
+        aLocateResult != ::utl::Bootstrap::PATH_VALID)
+    {
+        throw Exception("Extension Manager: Could not obtain path for UserInstallation.", nullptr);
+    }
+
+    rtlDigest digest = rtl_digest_create( rtl_Digest_AlgorithmMD5 );
+    if (!digest) {
+        throw RuntimeException("cannot get digest rtl_Digest_AlgorithmMD5!", nullptr );
+    }
+
+    sal_uInt8 const * data =
+        reinterpret_cast<sal_uInt8 const *>(userPath.getStr());
+    std::size_t size = userPath.getLength() * sizeof (sal_Unicode);
+    sal_uInt32 md5_key_len = rtl_digest_queryLength( digest );
+    std::unique_ptr<sal_uInt8[]> md5_buf( new sal_uInt8 [ md5_key_len ] );
+
+    rtl_digest_init( digest, data, static_cast<sal_uInt32>(size) );
+    rtl_digest_update( digest, data, static_cast<sal_uInt32>(size) );
+    rtl_digest_get( digest, md5_buf.get(), md5_key_len );
+    rtl_digest_destroy( digest );
+
+    // create hex-value string from the MD5 value to keep
+    // the string size minimal
+    OUStringBuffer buf;
+    buf.append( "SingleOfficeIPC_" );
+    for ( sal_uInt32 i = 0; i < md5_key_len; ++i ) {
+        buf.append( static_cast<sal_Int32>(md5_buf[ i ]), 0x10 );
+    }
+    return buf.makeStringAndClear();
+}
+
+bool existsOfficePipe()
+{
+    static OUString OfficePipeId = generateOfficePipeId();
+
+    OUString const & pipeId = OfficePipeId;
+    if (pipeId.isEmpty())
+        return false;
+    ::osl::Security sec;
+    ::osl::Pipe pipe( pipeId, osl_Pipe_OPEN, sec );
+    return pipe.is();
+}
+
+//get modification time
+bool getModifyTimeTargetFile(const OUString &rFileURL, TimeValue &rTime)
+{
+    salhelper::LinkResolver aResolver(osl_FileStatus_Mask_ModifyTime);
+
+    if (aResolver.fetchFileStatus(rFileURL) != osl::FileBase::E_None)
+        return false;
+
+    rTime = aResolver.m_aStatus.getModifyTime();
+
+    return true;
+}
+
+//Returns true if the Folder was more recently modified then
+//the lastsynchronized file. That is the repository needs to
+//be synchronized.
+bool compareExtensionFolderWithLastSynchronizedFile(
+    OUString const & folderURL, OUString const & fileURL)
+{
+    bool bNeedsSync = false;
+    ::osl::DirectoryItem itemExtFolder;
+    ::osl::File::RC err1 =
+          ::osl::DirectoryItem::get(folderURL, itemExtFolder);
+    //If it does not exist, then there is nothing to be done
+    if (err1 == ::osl::File::E_NOENT)
+    {
+        return false;
+    }
+    else if (err1 != ::osl::File::E_None)
+    {
+        OSL_FAIL("Cannot access extension folder");
+        return true; //sync just in case
+    }
+
+    //If last synchronized does not exist, then OOo is started for the first time
+    ::osl::DirectoryItem itemFile;
+    ::osl::File::RC err2 = ::osl::DirectoryItem::get(fileURL, itemFile);
+    if (err2 == ::osl::File::E_NOENT)
+    {
+        return true;
+
+    }
+    else if (err2 != ::osl::File::E_None)
+    {
+        OSL_FAIL("Cannot access file lastsynchronized");
+        return true; //sync just in case
+    }
+
+    //compare the modification time of the extension folder and the last
+    //modified file
+    TimeValue timeFolder;
+    if (getModifyTimeTargetFile(folderURL, timeFolder))
+    {
+        TimeValue timeFile;
+        if (getModifyTimeTargetFile(fileURL, timeFile))
+        {
+            if (timeFile.Seconds < timeFolder.Seconds)
+                bNeedsSync = true;
+        }
+        else
+        {
+            OSL_ASSERT(false);
+            bNeedsSync = true;
+        }
+    }
+    else
+    {
+        OSL_ASSERT(false);
+        bNeedsSync = true;
+    }
+
+    return bNeedsSync;
+}
+
+bool needToSyncRepository(std::u16string_view name)
+{
+    OUString folder;
+    OUString file;
+    if ( name == u"bundled" )
+    {
+        folder = "$BUNDLED_EXTENSIONS";
+        file = "$BUNDLED_EXTENSIONS_USER/lastsynchronized";
+    }
+    else if ( name == u"shared" )
+    {
+        folder = "$UNO_SHARED_PACKAGES_CACHE/uno_packages";
+        file = "$SHARED_EXTENSIONS_USER/lastsynchronized";
+    }
+    else
+    {
+        OSL_ASSERT(false);
+        return true;
+    }
+    ::rtl::Bootstrap::expandMacros(folder);
+    ::rtl::Bootstrap::expandMacros(file);
+    return compareExtensionFolderWithLastSynchronizedFile(
+        folder, file);
+}
+
+
+} // anon namespace
+
+
+namespace {
+OUString encodeForRcFile( OUString const & str )
+{
+    // escape $\{} (=> rtl bootstrap files)
+    OUStringBuffer buf(64);
+    sal_Int32 pos = 0;
+    const sal_Int32 len = str.getLength();
+    for ( ; pos < len; ++pos ) {
+        sal_Unicode c = str[ pos ];
+        switch (c) {
+        case '$':
+        case '\\':
+        case '{':
+        case '}':
+            buf.append( '\\' );
+            break;
+        }
+        buf.append( c );
+    }
+    return buf.makeStringAndClear();
+}
+}
+
+
+OUString makeURL( OUString const & baseURL, OUString const & relPath_ )
+{
+    OUStringBuffer buf(128);
+    if (baseURL.getLength() > 1 && baseURL[ baseURL.getLength() - 1 ] == '/')
+        buf.append( baseURL.subView(0, baseURL.getLength() - 1) );
+    else
+        buf.append( baseURL );
+    OUString relPath(relPath_);
+    if( relPath.startsWith("/") )
+        relPath = relPath.copy( 1 );
+    if (!relPath.isEmpty())
+    {
+        buf.append( '/' );
+        if (baseURL.match( "vnd.sun.star.expand:" )) {
+            // encode for macro expansion: relPath is supposed to have no
+            // macros, so encode $, {} \ (bootstrap mimic)
+            relPath = encodeForRcFile(relPath);
+
+            // encode once more for vnd.sun.star.expand schema:
+            // vnd.sun.star.expand:$UNO_...
+            // will expand to file-url
+            relPath = ::rtl::Uri::encode( relPath, rtl_UriCharClassUric,
+                                          rtl_UriEncodeIgnoreEscapes,
+                                          RTL_TEXTENCODING_UTF8 );
+        }
+        buf.append( relPath );
+    }
+    return buf.makeStringAndClear();
+}
+
+OUString makeURLAppendSysPathSegment( OUString const & baseURL, OUString const & segment )
+{
+    OSL_ASSERT(segment.indexOf(u'/') == -1);
+
+    ::rtl::Uri::encode(
+        segment, rtl_UriCharClassPchar, rtl_UriEncodeIgnoreEscapes,
+        RTL_TEXTENCODING_UTF8);
+    return makeURL(baseURL, segment);
+}
+
+
+OUString expandUnoRcTerm( OUString const & term_ )
+{
+    OUString term(term_);
+    UnoRc::get()->expandMacrosFrom( term );
+    return term;
+}
+
+OUString makeRcTerm( OUString const & url )
+{
+    OSL_ASSERT( url.match( "vnd.sun.star.expand:" ));
+    if (url.match( "vnd.sun.star.expand:" )) {
+        // cut protocol:
+        OUString rcterm( url.copy( sizeof ("vnd.sun.star.expand:") - 1 ) );
+        // decode uric class chars:
+        rcterm = ::rtl::Uri::decode(
+            rcterm, rtl_UriDecodeWithCharset, RTL_TEXTENCODING_UTF8 );
+        return rcterm;
+    }
+    else
+        return url;
+}
+
+
+OUString expandUnoRcUrl( OUString const & url )
+{
+    if (url.match( "vnd.sun.star.expand:" )) {
+        // cut protocol:
+        OUString rcurl( url.copy( sizeof ("vnd.sun.star.expand:") - 1 ) );
+        // decode uric class chars:
+        rcurl = ::rtl::Uri::decode(
+            rcurl, rtl_UriDecodeWithCharset, RTL_TEXTENCODING_UTF8 );
+        // expand macro string:
+        UnoRc::get()->expandMacrosFrom( rcurl );
+        return rcurl;
+    }
+    else {
+        return url;
+    }
+}
+
+
+bool office_is_running()
+{
+    //We need to check if we run within the office process. Then we must not use the pipe, because
+    //this could cause a deadlock. This is actually a workaround for i82778
+    OUString sFile;
+    oslProcessError err = osl_getExecutableFile(& sFile.pData);
+    bool ret = false;
+    if (osl_Process_E_None == err)
+    {
+        sFile = sFile.copy(sFile.lastIndexOf('/') + 1);
+        if (
+#if defined _WIN32
+            //osl_getExecutableFile should deliver "soffice.bin" on windows
+            //even if swriter.exe, scalc.exe etc. was started. This is a bug
+            //in osl_getExecutableFile
+            sFile == "soffice.bin" || sFile == "soffice.exe" || sFile == "soffice.com"
+            || sFile == "soffice" || sFile == "swriter.exe" || sFile == "swriter"
+            || sFile == "scalc.exe" || sFile == "scalc" || sFile == "simpress.exe"
+            || sFile == "simpress" || sFile == "sdraw.exe" || sFile == "sdraw"
+            || sFile == "sbase.exe" || sFile == "sbase"
+#elif defined MACOSX
+            sFile == "soffice"
+#elif defined UNIX
+            sFile == "soffice.bin"
+#else
+#error "Unsupported platform"
+#endif
+
+            )
+            ret = true;
+        else
+            ret = existsOfficePipe();
+    }
+    else
+    {
+        OSL_FAIL("NOT osl_Process_E_None ");
+        //if osl_getExecutable file then we take the risk of creating a pipe
+        ret =  existsOfficePipe();
+    }
+    return ret;
+}
+
+
+oslProcess raiseProcess(
+    OUString const & appURL, Sequence<OUString> const & args )
+{
+    ::osl::Security sec;
+    oslProcess hProcess = nullptr;
+    oslProcessError rc = osl_executeProcess(
+        appURL.pData,
+        reinterpret_cast<rtl_uString **>(
+            const_cast<OUString *>(args.getConstArray()) ),
+        args.getLength(),
+        osl_Process_DETACHED,
+        sec.getHandle(),
+        nullptr, // => current working dir
+        nullptr, 0, // => no env vars
+        &hProcess );
+
+    switch (rc) {
+    case osl_Process_E_None:
+        break;
+    case osl_Process_E_NotFound:
+        throw RuntimeException( "image not found!", nullptr );
+    case osl_Process_E_TimedOut:
+        throw RuntimeException( "timeout occurred!", nullptr );
+    case osl_Process_E_NoPermission:
+        throw RuntimeException( "permission denied!", nullptr );
+    case osl_Process_E_Unknown:
+        throw RuntimeException( "unknown error!", nullptr );
+    case osl_Process_E_InvalidError:
+    default:
+        throw RuntimeException( "unmapped error!", nullptr );
+    }
+
+    return hProcess;
+}
+
+
+OUString generateRandomPipeId()
+{
+    // compute some good pipe id:
+    static rtlRandomPool s_hPool = rtl_random_createPool();
+    if (s_hPool == nullptr)
+        throw RuntimeException( "cannot create random pool!?", nullptr );
+    sal_uInt8 bytes[ 32 ];
+    if (rtl_random_getBytes(
+            s_hPool, bytes, SAL_N_ELEMENTS(bytes) ) != rtl_Random_E_None) {
+        throw RuntimeException( "random pool error!?", nullptr );
+    }
+    OUStringBuffer buf;
+    for (unsigned char byte : bytes) {
+        buf.append( static_cast<sal_Int32>(byte), 0x10 );
+    }
+    return buf.makeStringAndClear();
+}
+
+
+Reference<XInterface> resolveUnoURL(
+    OUString const & connectString,
+    Reference<XComponentContext> const & xLocalContext,
+    AbortChannel const * abortChannel )
+{
+    Reference<bridge::XUnoUrlResolver> xUnoUrlResolver(
+        bridge::UnoUrlResolver::create( xLocalContext ) );
+
+    for (int i = 0; i <= 40; ++i) // 20 seconds
+    {
+        if (abortChannel != nullptr && abortChannel->isAborted()) {
+            throw ucb::CommandAbortedException( "abort!" );
+        }
+        try {
+            return xUnoUrlResolver->resolve( connectString );
+        }
+        catch (const connection::NoConnectException &) {
+            if (i < 40)
+            {
+                ::osl::Thread::wait( std::chrono::milliseconds(500) );
+            }
+            else throw;
+        }
+    }
+    return nullptr; // warning C4715
+}
+
+static void writeConsoleWithStream(std::u16string_view sText, FILE * stream)
+{
+    OString s = OUStringToOString(sText, osl_getThreadTextEncoding());
+    fprintf(stream, "%s", s.getStr());
+    fflush(stream);
+}
+
+void writeConsole(std::u16string_view sText)
+{
+    writeConsoleWithStream(sText, stdout);
+}
+
+void writeConsoleError(std::u16string_view sText)
+{
+    writeConsoleWithStream(sText, stderr);
+}
+
+OUString readConsole()
+{
+    char buf[1024];
+    memset(buf, 0, 1024);
+    // read one char less so that the last char in buf is always zero
+    if (fgets(buf, 1024, stdin) != nullptr)
+    {
+        OUString value = OStringToOUString(std::string_view(buf), osl_getThreadTextEncoding());
+        return value.trim();
+    }
+    throw css::uno::RuntimeException("reading from stdin failed");
+}
+
+void TRACE(OUString const & sText)
+{
+    SAL_INFO("desktop.deployment", sText);
+}
+
+void syncRepositories(
+    bool force, Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    OUString sDisable;
+    ::rtl::Bootstrap::get( "DISABLE_EXTENSION_SYNCHRONIZATION", sDisable, OUString() );
+    if (!sDisable.isEmpty())
+        return;
+
+    Reference<deployment::XExtensionManager> xExtensionManager;
+    //synchronize shared before bundled otherwise there are
+    //more revoke and registration calls.
+    bool bModified = false;
+    if (force || needToSyncRepository(u"shared") || needToSyncRepository(u"bundled"))
+    {
+        xExtensionManager =
+            deployment::ExtensionManager::get(
+                comphelper::getProcessComponentContext());
+
+        if (xExtensionManager.is())
+        {
+            bModified = xExtensionManager->synchronize(
+                Reference<task::XAbortChannel>(), xCmdEnv);
+        }
+    }
+#if !HAVE_FEATURE_MACOSX_SANDBOX
+    if (bModified && !comphelper::LibreOfficeKit::isActive())
+    {
+        Reference<task::XRestartManager> restarter(task::OfficeRestartManager::get(comphelper::getProcessComponentContext()));
+        if (restarter.is())
+        {
+            restarter->requestRestart(xCmdEnv.is() ? xCmdEnv->getInteractionHandler() :
+                                      Reference<task::XInteractionHandler>());
+        }
+    }
+#endif
+}
+
+void disposeBridges(Reference<css::uno::XComponentContext> const & ctx)
+{
+    if (!ctx.is())
+        return;
+
+    Reference<css::bridge::XBridgeFactory2> bridgeFac( css::bridge::BridgeFactory::create(ctx) );
+
+    const Sequence< Reference<css::bridge::XBridge> >seqBridges = bridgeFac->getExistingBridges();
+    for (const Reference<css::bridge::XBridge>& bridge : seqBridges)
+    {
+        Reference<css::lang::XComponent> comp(bridge, UNO_QUERY);
+        if (comp.is())
+        {
+            try {
+                comp->dispose();
+            }
+            catch ( const css::lang::DisposedException& )
+            {
+            }
+        }
+    }
+}
+
+}
+
+OUString DpResId(TranslateId aId)
+{
+    static std::locale SINGLETON = Translate::Create("dkt");
+    return Translate::get(aId, SINGLETON);
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_platform.cxx b/desktop/source/deployment/misc/dp_platform.cxx
new file mode 100644
index 000000000..879e617b7
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_platform.cxx
@@ -0,0 +1,207 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <dp_platform.hxx>
+#include <rtl/ustring.hxx>
+#include <rtl/instance.hxx>
+#include <rtl/bootstrap.hxx>
+#include <osl/diagnose.h>
+#include <o3tl/string_view.hxx>
+
+constexpr OUStringLiteral PLATFORM_ALL = u"all";
+
+
+namespace dp_misc
+{
+namespace
+{
+    struct StrOperatingSystem :
+        public rtl::StaticWithInit<OUString, StrOperatingSystem> {
+             OUString operator () () {
+                OUString os( "$_OS" );
+                ::rtl::Bootstrap::expandMacros( os );
+                return os;
+            }
+    };
+
+    struct StrCPU :
+        public rtl::StaticWithInit<OUString, StrCPU> {
+            OUString operator () () {
+                OUString arch( "$_ARCH" );
+                ::rtl::Bootstrap::expandMacros( arch );
+                return arch;
+            }
+    };
+
+
+    struct StrPlatform : public rtl::StaticWithInit<
+        OUString, StrPlatform> {
+            OUString operator () () {
+                return StrOperatingSystem::get() + "_" + StrCPU::get();
+            }
+    };
+
+    bool checkOSandCPU(std::u16string_view os, std::u16string_view cpu)
+    {
+        return (os == StrOperatingSystem::get())
+            && (cpu == StrCPU::get());
+    }
+
+    bool isPlatformSupported( std::u16string_view token )
+    {
+        bool ret = false;
+        if (token == PLATFORM_ALL)
+            ret = true;
+        else if (token == u"windows_x86")
+            ret = checkOSandCPU(u"Windows", u"x86");
+        else if (token == u"windows_x86_64")
+            ret = checkOSandCPU(u"Windows", u"X86_64");
+        else if (token == u"windows_aarch64")
+            ret = checkOSandCPU(u"Windows", u"AARCH64");
+        else if (token == u"solaris_sparc")
+            ret = checkOSandCPU(u"Solaris", u"SPARC");
+        else if (token == u"solaris_sparc64")
+            ret = checkOSandCPU(u"Solaris", u"SPARC64");
+        else if (token == u"solaris_x86")
+            ret = checkOSandCPU(u"Solaris", u"x86");
+        else if (token == u"aix_powerpc")
+            ret = checkOSandCPU(u"AIX", u"PowerPC");
+        else if (token == u"macosx_aarch64")
+            ret = checkOSandCPU(u"MacOSX", u"AARCH64");
+        else if (token == u"macosx_x86_64")
+            ret = checkOSandCPU(u"MacOSX", u"X86_64");
+        else if (token == u"linux_x86")
+            ret = checkOSandCPU(u"Linux", u"x86");
+        else if (token == u"linux_x86_64")
+            ret = checkOSandCPU(u"Linux", u"X86_64");
+        else if (token == u"linux_sparc")
+            ret = checkOSandCPU(u"Linux", u"SPARC");
+        else if (token == u"linux_sparc64")
+            ret = checkOSandCPU(u"Linux", u"SPARC64");
+        else if (token == u"linux_powerpc")
+            ret = checkOSandCPU(u"Linux", u"PowerPC");
+        else if (token == u"linux_powerpc64")
+            ret = checkOSandCPU(u"Linux", u"PowerPC_64");
+        else if (token == u"linux_powerpc64_le")
+            ret = checkOSandCPU(u"Linux", u"PowerPC_64_LE");
+        else if (token == u"linux_arm_eabi")
+            ret = checkOSandCPU(u"Linux", u"ARM_EABI");
+        else if (token == u"linux_arm_oabi")
+            ret = checkOSandCPU(u"Linux", u"ARM_OABI");
+        else if (token == u"linux_mips_el")
+            ret = checkOSandCPU(u"Linux", u"MIPS_EL");
+        else if (token == u"linux_mips64_el")
+            ret = checkOSandCPU(u"Linux", u"MIPS64_EL");
+        else if (token == u"linux_mips_eb")
+            ret = checkOSandCPU(u"Linux", u"MIPS_EB");
+        else if (token == u"linux_mips64_eb")
+            ret = checkOSandCPU(u"Linux", u"MIPS64_EB");
+        else if (token == u"linux_ia64")
+            ret = checkOSandCPU(u"Linux", u"IA64");
+        else if (token == u"linux_m68k")
+            ret = checkOSandCPU(u"Linux", u"M68K");
+        else if (token == u"linux_s390")
+            ret = checkOSandCPU(u"Linux", u"S390");
+        else if (token == u"linux_s390x")
+            ret = checkOSandCPU(u"Linux", u"S390x");
+        else if (token == u"linux_hppa")
+            ret = checkOSandCPU(u"Linux", u"HPPA");
+        else if (token == u"linux_alpha")
+            ret = checkOSandCPU(u"Linux", u"ALPHA");
+        else if (token == u"linux_aarch64")
+            ret = checkOSandCPU(u"Linux", u"AARCH64");
+        else if (token == u"freebsd_x86")
+            ret = checkOSandCPU(u"FreeBSD", u"x86");
+        else if (token == u"freebsd_x86_64")
+            ret = checkOSandCPU(u"FreeBSD", u"X86_64");
+        else if (token == u"freebsd_powerpc")
+            ret = checkOSandCPU(u"FreeBSD", u"PowerPC");
+        else if (token == u"freebsd_powerpc64")
+            ret = checkOSandCPU(u"FreeBSD", u"PowerPC64");
+        else if (token == u"kfreebsd_x86")
+            ret = checkOSandCPU(u"kFreeBSD", u"x86");
+        else if (token == u"kfreebsd_x86_64")
+            ret = checkOSandCPU(u"kFreeBSD", u"X86_64");
+        else if (token == u"netbsd_x86")
+            ret = checkOSandCPU(u"NetBSD", u"x86");
+        else if (token == u"netbsd_x86_64")
+            ret = checkOSandCPU(u"NetBSD", u"X86_64");
+        else if (token == u"openbsd_x86")
+            ret = checkOSandCPU(u"OpenBSD", u"x86");
+        else if (token == u"openbsd_x86_64")
+            ret = checkOSandCPU(u"OpenBSD", u"X86_64");
+        else if (token == u"dragonfly_x86")
+            ret = checkOSandCPU(u"DragonFly", u"x86");
+        else if (token == u"dragonfly_x86_64")
+            ret = checkOSandCPU(u"DragonFly", u"X86_64");
+        else
+        {
+            OSL_FAIL("Extension Manager: The extension supports an unknown platform. "
+            "Check the platform in the description.xml");
+            ret = false;
+        }
+        return ret;
+    }
+
+} // anon namespace
+
+
+OUString const & getPlatformString()
+{
+    return StrPlatform::get();
+}
+
+bool platform_fits( std::u16string_view platform_string )
+{
+    sal_Int32 index = 0;
+    for (;;)
+    {
+        const std::u16string_view token(
+            o3tl::trim(o3tl::getToken(platform_string, 0, ',', index )) );
+        // check if this platform:
+        if (o3tl::equalsIgnoreAsciiCase( token, StrPlatform::get() ) ||
+            (token.find( '_' ) == std::u16string_view::npos && /* check OS part only */
+             o3tl::equalsIgnoreAsciiCase( token, StrOperatingSystem::get() )))
+        {
+            return true;
+        }
+        if (index < 0)
+            break;
+    }
+    return false;
+}
+
+bool hasValidPlatform( css::uno::Sequence<OUString> const & platformStrings)
+{
+    bool ret = false;
+    for (const OUString& s : platformStrings)
+    {
+        if ( isPlatformSupported( s ) )
+        {
+            ret = true;
+            break;
+        }
+    }
+    return ret;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_resource.cxx b/desktop/source/deployment/misc/dp_resource.cxx
new file mode 100644
index 000000000..682c90e52
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_resource.cxx
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <dp_resource.h>
+#include <unotools/configmgr.hxx>
+#include <i18nlangtag/languagetag.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace dp_misc
+{
+const LanguageTag& getOfficeLanguageTag()
+{
+    static const LanguageTag OFFICE_LANG = []() {
+        OUString slang(utl::ConfigManager::getUILocale());
+        //fallback, the locale is currently only set when the user starts the
+        //office for the first time.
+        if (slang.isEmpty())
+            slang = "en-US";
+        return LanguageTag(slang);
+    }();
+    return OFFICE_LANG;
+}
+}
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_ucb.cxx b/desktop/source/deployment/misc/dp_ucb.cxx
new file mode 100644
index 000000000..28f4192ee
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_ucb.cxx
@@ -0,0 +1,304 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <rtl/uri.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <ucbhelper/content.hxx>
+#include <xmlscript/xml_helper.hxx>
+#include <com/sun/star/io/XOutputStream.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/ContentInfo.hpp>
+#include <com/sun/star/ucb/ContentInfoAttribute.hpp>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <comphelper/processfactory.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_misc
+{
+
+
+bool create_ucb_content(
+    ::ucbhelper::Content * ret_ucbContent, OUString const & url,
+    Reference<XCommandEnvironment> const & xCmdEnv,
+    bool throw_exc )
+{
+    try {
+        // Existence check...
+        // content ctor/isFolder() will throw exception in case the resource
+        // does not exist.
+
+        // dilemma: no chance to use the given handler here, because it would
+        //          raise no such file dialogs, else no interaction for
+        //          passwords, ...? xxx todo
+        ::ucbhelper::Content ucbContent(
+            url, Reference<XCommandEnvironment>(),
+            comphelper::getProcessComponentContext() );
+
+        ucbContent.isFolder();
+
+        if (ret_ucbContent != nullptr)
+        {
+            ucbContent.setCommandEnvironment( xCmdEnv );
+            *ret_ucbContent = ucbContent;
+        }
+        return true;
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        if (throw_exc)
+            throw;
+    }
+    return false;
+}
+
+
+bool create_folder(
+    ::ucbhelper::Content * ret_ucb_content, OUString const & url_,
+    Reference<XCommandEnvironment> const & xCmdEnv, bool throw_exc )
+{
+    ::ucbhelper::Content ucb_content;
+    if (create_ucb_content(
+            &ucb_content, url_, xCmdEnv, false /* no throw */ ))
+    {
+        if (ucb_content.isFolder()) {
+            if (ret_ucb_content != nullptr)
+                *ret_ucb_content = ucb_content;
+            return true;
+        }
+    }
+
+    OUString url( url_ );
+    // xxx todo: find parent
+    sal_Int32 slash = url.lastIndexOf( '/' );
+    if (slash < 0) {
+        // fallback:
+        url = expandUnoRcUrl( url );
+        slash = url.lastIndexOf( '/' );
+    }
+    if (slash < 0) {
+        // invalid: has to be at least "auth:/..."
+        if (throw_exc)
+            throw ContentCreationException(
+                "Cannot create folder (invalid path): '" + url + "'",
+                Reference<XInterface>(), ContentCreationError_UNKNOWN );
+        return false;
+    }
+    ::ucbhelper::Content parentContent;
+    if (! create_folder(
+            &parentContent, url.copy( 0, slash ), xCmdEnv, throw_exc ))
+        return false;
+    const Any title( ::rtl::Uri::decode( url.copy( slash + 1 ),
+                                         rtl_UriDecodeWithCharset,
+                                         RTL_TEXTENCODING_UTF8 ) );
+    const Sequence<ContentInfo> infos(
+        parentContent.queryCreatableContentsInfo() );
+    for ( ContentInfo const & info : infos )
+    {
+        // look KIND_FOLDER:
+        if ((info.Attributes & ContentInfoAttribute::KIND_FOLDER) != 0)
+        {
+            // make sure the only required bootstrap property is "Title":
+            Sequence<beans::Property> const & rProps = info.Properties;
+            if ( rProps.getLength() != 1 || rProps[ 0 ].Name != "Title" )
+                continue;
+
+            try {
+                if (parentContent.insertNewContent(
+                        info.Type,
+                        StrTitle::getTitleSequence(),
+                        Sequence<Any>( &title, 1 ),
+                        ucb_content )) {
+                    if (ret_ucb_content != nullptr)
+                        *ret_ucb_content = ucb_content;
+                    return true;
+                }
+            }
+            catch (const RuntimeException &) {
+                throw;
+            }
+            catch (const CommandFailedException &) {
+                // Interaction Handler already handled the error
+                // that has occurred...
+            }
+            catch (const Exception &) {
+                if (throw_exc)
+                    throw;
+                return false;
+            }
+        }
+    }
+    if (throw_exc)
+        throw ContentCreationException(
+            "Cannot create folder: '" + url + "'",
+            Reference<XInterface>(), ContentCreationError_UNKNOWN );
+    return false;
+}
+
+
+bool erase_path( OUString const & url,
+                 Reference<XCommandEnvironment> const & xCmdEnv,
+                 bool throw_exc )
+{
+    ::ucbhelper::Content ucb_content;
+    if (create_ucb_content( &ucb_content, url, xCmdEnv, false /* no throw */ ))
+    {
+        try {
+            ucb_content.executeCommand(
+                "delete", Any( true /* delete physically */ ) );
+        }
+        catch (const RuntimeException &) {
+            throw;
+        }
+        catch (const Exception &) {
+            if (throw_exc)
+                throw;
+            return false;
+        }
+    }
+    return true;
+}
+
+
+std::vector<sal_Int8> readFile( ::ucbhelper::Content & ucb_content )
+{
+    std::vector<sal_Int8> bytes;
+    Reference<io::XOutputStream> xStream(
+        ::xmlscript::createOutputStream( &bytes ) );
+    if (! ucb_content.openStream( xStream ))
+        throw RuntimeException(
+            "::ucbhelper::Content::openStream( XOutputStream ) failed!",
+            nullptr );
+    return bytes;
+}
+
+
+bool readLine( OUString * res, OUString const & startingWith,
+               ::ucbhelper::Content & ucb_content, rtl_TextEncoding textenc )
+{
+    // read whole file:
+    std::vector<sal_Int8> bytes( readFile( ucb_content ) );
+    OUString file( reinterpret_cast<char const *>(bytes.data()),
+                   bytes.size(), textenc );
+    sal_Int32 pos = 0;
+    for (;;)
+    {
+        if (file.match( startingWith, pos ))
+        {
+            OUStringBuffer buf;
+            sal_Int32 start = pos;
+            pos += startingWith.getLength();
+            for (;;)
+            {
+                pos = file.indexOf( LF, pos );
+                if (pos < 0) { // EOF
+                    buf.append( file.subView(start) );
+                }
+                else
+                {
+                    if (pos > 0 && file[ pos - 1 ] == CR)
+                    {
+                        // consume extra CR
+                        buf.append( file.subView(start, pos - start - 1) );
+                        ++pos;
+                    }
+                    else
+                        buf.append( file.subView(start, pos - start) );
+                    ++pos; // consume LF
+                    // check next line:
+                    if (pos < file.getLength() &&
+                        (file[ pos ] == ' ' || file[ pos ] == '\t'))
+                    {
+                        buf.append( ' ' );
+                        ++pos;
+                        start = pos;
+                        continue;
+                    }
+                }
+                break;
+            }
+            *res = buf.makeStringAndClear();
+            return true;
+        }
+        // next line:
+        sal_Int32 next_lf = file.indexOf( LF, pos );
+        if (next_lf < 0) // EOF
+            break;
+        pos = next_lf + 1;
+    }
+    return false;
+}
+
+bool readProperties( std::vector< std::pair< OUString, OUString> > & out_result,
+                     ::ucbhelper::Content & ucb_content )
+{
+    // read whole file:
+    std::vector<sal_Int8> bytes( readFile( ucb_content ) );
+    OUString file( reinterpret_cast<char const *>(bytes.data()),
+                   bytes.size(), RTL_TEXTENCODING_UTF8);
+    sal_Int32 pos = 0;
+
+    for (;;)
+    {
+
+        OUStringBuffer buf;
+        sal_Int32 start = pos;
+
+        bool bEOF = false;
+        pos = file.indexOf( LF, pos );
+        if (pos < 0) { // EOF
+            buf.append( file.subView(start) );
+            bEOF = true;
+        }
+        else
+        {
+            if (pos > 0 && file[ pos - 1 ] == CR)
+                // consume extra CR
+                buf.append( file.subView(start, pos - start - 1) );
+            else
+                buf.append( file.subView(start, pos - start) );
+            pos++;
+        }
+        OUString aLine = buf.makeStringAndClear();
+
+        sal_Int32 posEqual = aLine.indexOf('=');
+        if (posEqual > 0 && (posEqual + 1) <  aLine.getLength())
+        {
+            OUString name = aLine.copy(0, posEqual);
+            OUString value = aLine.copy(posEqual + 1);
+            out_result.emplace_back(name, value);
+        }
+
+        if (bEOF)
+            break;
+    }
+    return false;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_update.cxx b/desktop/source/deployment/misc/dp_update.cxx
new file mode 100644
index 000000000..7116be42b
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_update.cxx
@@ -0,0 +1,408 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <config_folders.h>
+
+#include <dp_update.hxx>
+#include <dp_version.hxx>
+#include <dp_identifier.hxx>
+#include <dp_descriptioninfoset.hxx>
+
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <osl/diagnose.h>
+#include <rtl/bootstrap.hxx>
+#include <sal/log.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+
+namespace dp_misc {
+namespace {
+
+int determineHighestVersion(
+    OUString const & userVersion,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion)
+{
+    int index = 0;
+    OUString  greatest = userVersion;
+    if (dp_misc::compareVersions(sharedVersion, greatest) == dp_misc::GREATER)
+    {
+        index = 1;
+        greatest = sharedVersion;
+    }
+    if (dp_misc::compareVersions(bundledVersion, greatest) == dp_misc::GREATER)
+    {
+        index = 2;
+        greatest = bundledVersion;
+    }
+    if (dp_misc::compareVersions(onlineVersion, greatest) == dp_misc::GREATER)
+    {
+        index = 3;
+    }
+    return index;
+}
+
+Sequence< Reference< xml::dom::XElement > >
+getUpdateInformation( Reference<deployment::XUpdateInformationProvider > const & updateInformation,
+                      Sequence< OUString > const & urls,
+                      OUString const & identifier,
+                      uno::Any & out_error)
+{
+    try {
+        return updateInformation->getUpdateInformation(urls, identifier);
+    } catch (const uno::RuntimeException &) {
+        throw;
+    } catch (const ucb::CommandFailedException & e) {
+        out_error = e.Reason;
+    } catch (const ucb::CommandAbortedException &) {
+    } catch (const uno::Exception & e) {
+        out_error <<= e;
+    }
+    return
+        Sequence<Reference< xml::dom::XElement > >();
+}
+
+void getOwnUpdateInfos(
+        Reference<uno::XComponentContext> const & xContext,
+        Reference<deployment::XUpdateInformationProvider > const &  updateInformation,
+        UpdateInfoMap& inout_map, std::vector<std::pair<Reference<deployment::XPackage>, uno::Any> > & out_errors,
+        bool & out_allFound)
+{
+    bool bAllHaveOwnUpdateInformation = true;
+    for (auto & inout : inout_map)
+    {
+        OSL_ASSERT(inout.second.extension.is());
+        Sequence<OUString> urls(inout.second.extension->getUpdateInformationURLs());
+        if (urls.hasElements())
+        {
+            const OUString search_id = dp_misc::getIdentifier(inout.second.extension);
+            SAL_INFO( "extensions.update", "Searching update for " << search_id );
+            uno::Any anyError;
+            //It is unclear from the idl if there can be a null reference returned.
+            //However all valid information should be the same
+            const Sequence<Reference< xml::dom::XElement > >
+                infos(getUpdateInformation(updateInformation, urls, search_id, anyError));
+            if (anyError.hasValue())
+                out_errors.emplace_back(inout.second.extension, anyError);
+
+            for (const Reference< xml::dom::XElement >& element : infos)
+            {
+                dp_misc::DescriptionInfoset infoset(
+                    xContext,
+                    Reference< xml::dom::XNode >(element, UNO_QUERY_THROW));
+                if (!infoset.hasDescription())
+                    continue;
+                std::optional< OUString > result_id(infoset.getIdentifier());
+                if (!result_id)
+                    continue;
+                SAL_INFO( "extensions.update", "  found version "
+                          << infoset.getVersion() << " for " << *result_id );
+                if (*result_id != search_id)
+                    continue;
+                inout.second.version = infoset.getVersion();
+                inout.second.info.set(element, UNO_QUERY_THROW);
+                break;
+            }
+        }
+        else
+        {
+            bAllHaveOwnUpdateInformation = false;
+        }
+    }
+    out_allFound = bAllHaveOwnUpdateInformation;
+}
+
+void getDefaultUpdateInfos(
+    Reference<uno::XComponentContext> const & xContext,
+    Reference<deployment::XUpdateInformationProvider > const &  updateInformation,
+    UpdateInfoMap& inout_map,
+     std::vector<std::pair<Reference<deployment::XPackage>, uno::Any> > & out_errors)
+{
+    const OUString sDefaultURL(dp_misc::getExtensionDefaultUpdateURL());
+    OSL_ASSERT(!sDefaultURL.isEmpty());
+
+    Any anyError;
+    const Sequence< Reference< xml::dom::XElement > >
+        infos(
+            getUpdateInformation(
+                updateInformation,
+                Sequence< OUString >(&sDefaultURL, 1), OUString(), anyError));
+    if (anyError.hasValue())
+        out_errors.emplace_back(Reference<deployment::XPackage>(), anyError);
+    for (const Reference< xml::dom::XElement >& element : infos)
+    {
+        Reference< xml::dom::XNode > node(element, UNO_QUERY_THROW);
+        dp_misc::DescriptionInfoset infoset(xContext, node);
+        std::optional< OUString > id(infoset.getIdentifier());
+        if (!id) {
+            continue;
+        }
+        UpdateInfoMap::iterator j = inout_map.find(*id);
+        if (j != inout_map.end())
+        {
+            //skip those extension which provide its own update urls
+            if (j->second.extension->getUpdateInformationURLs().getLength())
+                continue;
+            OUString v(infoset.getVersion());
+            //look for the highest version in the online repository
+            if (dp_misc::compareVersions(v, j->second.version) ==
+                dp_misc::GREATER)
+            {
+                j->second.version = v;
+                j->second.info = node;
+            }
+        }
+    }
+}
+
+bool containsBundledOnly(Sequence<Reference<deployment::XPackage> > const & sameIdExtensions)
+{
+    OSL_ASSERT(sameIdExtensions.getLength() == 3);
+    return !sameIdExtensions[0].is() && !sameIdExtensions[1].is() && sameIdExtensions[2].is();
+}
+
+/** Returns true if the list of extensions are bundled extensions and there are no
+    other extensions with the same identifier in the shared or user repository.
+    If extensionList is NULL, then it is checked if there are only bundled extensions.
+*/
+bool onlyBundledExtensions(
+    Reference<deployment::XExtensionManager> const & xExtMgr,
+    std::vector< Reference<deployment::XPackage > > const * extensionList)
+{
+    OSL_ASSERT(xExtMgr.is());
+    bool bOnlyBundled = true;
+    if (extensionList)
+    {
+        for (auto const& elem : *extensionList)
+        {
+            Sequence<Reference<deployment::XPackage> > seqExt = xExtMgr->getExtensionsWithSameIdentifier(
+                dp_misc::getIdentifier(elem), elem->getName(), Reference<ucb::XCommandEnvironment>());
+
+            bOnlyBundled = containsBundledOnly(seqExt);
+            if (!bOnlyBundled)
+                break;
+        }
+    }
+    else
+    {
+        const uno::Sequence< uno::Sequence< Reference<deployment::XPackage > > > seqAllExt =
+            xExtMgr->getAllExtensions(Reference<task::XAbortChannel>(), Reference<ucb::XCommandEnvironment>());
+
+        for (int pos(0), nLen(seqAllExt.getLength()); bOnlyBundled && pos != nLen; ++pos)
+        {
+            bOnlyBundled = containsBundledOnly(seqAllExt[pos]);
+        }
+    }
+    return bOnlyBundled;
+}
+
+} // anon namespace
+
+
+OUString getExtensionDefaultUpdateURL()
+{
+    OUString sUrl(
+        "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version")
+        ":Version:ExtensionUpdateURL}");
+    ::rtl::Bootstrap::expandMacros(sUrl);
+    return sUrl;
+}
+
+/* returns the index of the greatest version, starting with 0
+
+ */
+UPDATE_SOURCE isUpdateUserExtension(
+    bool bReadOnlyShared,
+    OUString const & userVersion,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion)
+{
+    UPDATE_SOURCE retVal = UPDATE_SOURCE_NONE;
+    if (bReadOnlyShared)
+    {
+        if (!userVersion.isEmpty())
+        {
+            int index = determineHighestVersion(
+                userVersion, sharedVersion, bundledVersion, onlineVersion);
+            if (index == 1)
+                retVal = UPDATE_SOURCE_SHARED;
+            else if (index == 2)
+                retVal = UPDATE_SOURCE_BUNDLED;
+            else if (index == 3)
+                retVal = UPDATE_SOURCE_ONLINE;
+        }
+        else if (!sharedVersion.isEmpty())
+        {
+            int index = determineHighestVersion(
+                OUString(), sharedVersion, bundledVersion, onlineVersion);
+            if (index == 2)
+                retVal = UPDATE_SOURCE_BUNDLED;
+            else if (index == 3)
+                retVal = UPDATE_SOURCE_ONLINE;
+
+        }
+    }
+    else
+    {
+        if (!userVersion.isEmpty())
+        {
+            int index = determineHighestVersion(
+                userVersion, sharedVersion, bundledVersion, onlineVersion);
+            if (index == 1)
+                retVal = UPDATE_SOURCE_SHARED;
+            else if (index == 2)
+                retVal = UPDATE_SOURCE_BUNDLED;
+            else if (index == 3)
+                retVal = UPDATE_SOURCE_ONLINE;
+        }
+    }
+
+    return retVal;
+}
+
+UPDATE_SOURCE isUpdateSharedExtension(
+    bool bReadOnlyShared,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion)
+{
+    if (bReadOnlyShared)
+        return UPDATE_SOURCE_NONE;
+    UPDATE_SOURCE retVal = UPDATE_SOURCE_NONE;
+
+    if (!sharedVersion.isEmpty())
+    {
+        int index = determineHighestVersion(
+            OUString(), sharedVersion, bundledVersion, onlineVersion);
+        if (index == 2)
+            retVal = UPDATE_SOURCE_BUNDLED;
+        else if (index == 3)
+            retVal = UPDATE_SOURCE_ONLINE;
+    }
+    return retVal;
+}
+
+Reference<deployment::XPackage>
+getExtensionWithHighestVersion(
+    Sequence<Reference<deployment::XPackage> > const & seqExt)
+{
+    if (!seqExt.hasElements())
+        return Reference<deployment::XPackage>();
+
+    Reference<deployment::XPackage> greatest;
+    sal_Int32 len = seqExt.getLength();
+
+    for (sal_Int32 i = 0; i < len; i++)
+    {
+        if (!greatest.is())
+        {
+            greatest = seqExt[i];
+            continue;
+        }
+        Reference<deployment::XPackage> const & current = seqExt[i];
+        //greatest has a value
+        if (! current.is())
+            continue;
+
+        if (dp_misc::compareVersions(current->getVersion(), greatest->getVersion()) == dp_misc::GREATER)
+            greatest = current;
+    }
+    return greatest;
+}
+
+UpdateInfo::UpdateInfo( Reference< deployment::XPackage> const & ext):
+extension(ext)
+{
+}
+
+
+UpdateInfoMap getOnlineUpdateInfos(
+    Reference<uno::XComponentContext> const &xContext,
+    Reference<deployment::XExtensionManager> const & xExtMgr,
+    Reference<deployment::XUpdateInformationProvider > const & updateInformation,
+    std::vector<Reference<deployment::XPackage > > const * extensionList,
+    std::vector<std::pair< Reference<deployment::XPackage>, uno::Any> > & out_errors)
+{
+    OSL_ASSERT(xExtMgr.is());
+    UpdateInfoMap infoMap;
+    if (!xExtMgr.is() || onlyBundledExtensions(xExtMgr, extensionList))
+        return infoMap;
+
+    if (!extensionList)
+    {
+        const uno::Sequence< uno::Sequence< Reference<deployment::XPackage > > > seqAllExt =  xExtMgr->getAllExtensions(
+            Reference<task::XAbortChannel>(), Reference<ucb::XCommandEnvironment>());
+
+        //fill the UpdateInfoMap. key = extension identifier, value = UpdateInfo
+        for (int pos = seqAllExt.getLength(); pos --; )
+        {
+            uno::Sequence<Reference<deployment::XPackage> > const &   seqExt = seqAllExt[pos];
+
+            Reference<deployment::XPackage> extension = getExtensionWithHighestVersion(seqExt);
+            OSL_ASSERT(extension.is());
+
+            std::pair<UpdateInfoMap::iterator, bool> insertRet = infoMap.emplace(
+                    dp_misc::getIdentifier(extension), UpdateInfo(extension));
+            OSL_ASSERT(insertRet.second);
+        }
+    }
+    else
+    {
+        for (auto const& elem : *extensionList)
+        {
+            OSL_ASSERT(elem.is());
+            std::pair<UpdateInfoMap::iterator, bool> insertRet = infoMap.emplace(
+                    dp_misc::getIdentifier(elem), UpdateInfo(elem));
+            OSL_ASSERT(insertRet.second);
+        }
+    }
+
+    //Now find the update information for the extensions which provide their own
+    //URLs to update information.
+    bool bAllInfosObtained = false;
+    getOwnUpdateInfos(xContext, updateInformation, infoMap, out_errors, bAllInfosObtained);
+
+    if (!bAllInfosObtained)
+        getDefaultUpdateInfos(xContext, updateInformation, infoMap, out_errors);
+    return infoMap;
+}
+OUString getHighestVersion(
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion)
+{
+    int index = determineHighestVersion(OUString(), sharedVersion, bundledVersion, onlineVersion);
+    switch (index)
+    {
+    case 1: return sharedVersion;
+    case 2: return bundledVersion;
+    case 3: return onlineVersion;
+    default: OSL_ASSERT(false);
+    }
+
+    return OUString();
+}
+} //namespace dp_misc
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/dp_version.cxx b/desktop/source/deployment/misc/dp_version.cxx
new file mode 100644
index 000000000..703045dde
--- /dev/null
+++ b/desktop/source/deployment/misc/dp_version.cxx
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <sal/config.h>
+
+#include <rtl/ustring.hxx>
+
+#include <dp_version.hxx>
+
+namespace {
+
+OUString getElement(OUString const & version, ::sal_Int32 * index)
+{
+    while (*index < version.getLength() && version[*index] == '0') {
+        ++*index;
+    }
+    return version.getToken(0, '.', *index);
+}
+
+}
+
+namespace dp_misc {
+
+::dp_misc::Order compareVersions(
+    OUString const & version1, OUString const & version2)
+{
+    for (::sal_Int32 i1 = 0, i2 = 0; i1 >= 0 || i2 >= 0;) {
+        OUString e1(i1 >= 0 ? getElement(version1, &i1) : OUString());
+        OUString e2(i2 >= 0 ? getElement(version2, &i2) : OUString());
+        if (e1.getLength() < e2.getLength()) {
+            return ::dp_misc::LESS;
+        } else if (e1.getLength() > e2.getLength()) {
+            return ::dp_misc::GREATER;
+        } else if (e1 < e2) {
+            return ::dp_misc::LESS;
+        } else if (e1 > e2) {
+            return ::dp_misc::GREATER;
+        }
+    }
+    return ::dp_misc::EQUAL;
+}
+
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/misc/lockfile.cxx b/desktop/source/deployment/misc/lockfile.cxx
new file mode 100644
index 000000000..206da8286
--- /dev/null
+++ b/desktop/source/deployment/misc/lockfile.cxx
@@ -0,0 +1,211 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <memory>
+
+#include <time.h>
+#ifndef _WIN32
+#include <unistd.h>
+#else
+#if !defined WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#endif
+#include <comphelper/random.hxx>
+#include <sal/types.h>
+#include <osl/file.hxx>
+#include <osl/security.hxx>
+#include <unotools/bootstrap.hxx>
+#include <tools/config.hxx>
+
+#include <lockfile.hxx>
+
+using namespace ::osl;
+using namespace ::utl;
+
+
+static OString impl_getHostname()
+{
+    OString aHost;
+#ifdef _WIN32
+    /*
+       prevent windows from connecting to the net to get its own
+       hostname by using the netbios name
+       */
+    DWORD sz = MAX_COMPUTERNAME_LENGTH + 1;
+    TCHAR szHost[MAX_COMPUTERNAME_LENGTH + 1];
+    if (GetComputerNameA(szHost, &sz))
+        aHost = OString(szHost);
+    else
+        aHost = OString("UNKNOWN");
+#else
+    /* Don't do dns lookup on Linux either */
+    char pHostName[1024];
+
+    if ( gethostname( pHostName, sizeof( pHostName ) - 1 ) == 0 )
+    {
+        pHostName[sizeof( pHostName ) - 1] = '\0';
+        aHost = OString( pHostName );
+    }
+    else
+        aHost = OString("UNKNOWN");
+#endif
+
+    return aHost;
+}
+
+namespace desktop {
+
+    Lockfile::Lockfile( bool bIPCserver )
+    :m_bIPCserver(bIPCserver)
+    ,m_bRemove(false)
+    ,m_bIsLocked(false)
+    {
+        // build the file-url to use for the lock
+        OUString aUserPath;
+        utl::Bootstrap::locateUserInstallation( aUserPath );
+        m_aLockname = aUserPath + "/.lock";
+
+        // generate ID
+        const int nIdBytes = 16;
+        char tmpId[nIdBytes*2+1];
+        time_t t = time(nullptr);
+        for (int i = 0; i<nIdBytes; i++) {
+            int tmpByte = comphelper::rng::uniform_int_distribution(0, 0xFF);
+            sprintf( tmpId+i*2, "%02X", tmpByte );
+        }
+        tmpId[nIdBytes*2]=0x00;
+        m_aId = OUString::createFromAscii( tmpId );
+
+        // generate date string
+        char *tmpTime = ctime( &t );
+        if (tmpTime != nullptr) {
+            m_aDate = OUString::createFromAscii( tmpTime );
+            sal_Int32 i = m_aDate.indexOf('\n');
+            if (i > 0)
+                m_aDate = m_aDate.copy(0, i);
+        }
+
+
+        // try to create file
+        File aFile(m_aLockname);
+        if (aFile.open( osl_File_OpenFlag_Create ) == File::E_EXIST) {
+            m_bIsLocked = true;
+        } else {
+            // new lock created
+            aFile.close( );
+            syncToFile( );
+            m_bRemove = true;
+        }
+    }
+
+    bool Lockfile::check( fpExecWarning execWarning )
+    {
+
+        if (m_bIsLocked) {
+            // lock existed, ask user what to do
+            if (isStale() ||
+                (execWarning != nullptr && (*execWarning)( this ))) {
+                // remove file and create new
+                File::remove( m_aLockname );
+                File aFile(m_aLockname);
+                (void)aFile.open( osl_File_OpenFlag_Create );
+                aFile.close( );
+                syncToFile( );
+                m_bRemove = true;
+                return true;
+            } else {
+                //leave alone and return false
+                m_bRemove = false;
+                return false;
+            }
+        } else {
+            // lock was created by us
+            return true;
+        }
+    }
+
+    bool Lockfile::isStale() const
+    {
+        // this checks whether the lockfile was created on the same
+        // host by the same user. Should this be the case it is safe
+        // to assume that it is a stale lockfile which can be overwritten
+        OUString aLockname = m_aLockname;
+        Config aConfig(aLockname);
+        aConfig.SetGroup(LOCKFILE_GROUP);
+        OString aIPCserver  = aConfig.ReadKey( LOCKFILE_IPCKEY );
+        if (!aIPCserver.equalsIgnoreAsciiCase("true"))
+            return false;
+
+        OString aHost = aConfig.ReadKey( LOCKFILE_HOSTKEY );
+        OString aUser = aConfig.ReadKey( LOCKFILE_USERKEY );
+
+        // lockfile from same host?
+        OString myHost( impl_getHostname() );
+        if (aHost == myHost) {
+            // lockfile by same UID
+            OUString myUserName;
+            Security aSecurity;
+            aSecurity.getUserName( myUserName );
+            OString myUser(OUStringToOString(myUserName, RTL_TEXTENCODING_ASCII_US));
+            if (aUser == myUser)
+                return true;
+        }
+        return false;
+    }
+
+    void Lockfile::syncToFile() const
+    {
+        OUString aLockname = m_aLockname;
+        Config aConfig(aLockname);
+        aConfig.SetGroup(LOCKFILE_GROUP);
+
+        // get information
+        OString aHost( impl_getHostname() );
+        OUString aUserName;
+        Security aSecurity;
+        aSecurity.getUserName( aUserName );
+        OString aUser  = OUStringToOString( aUserName, RTL_TEXTENCODING_ASCII_US );
+        OString aTime  = OUStringToOString( m_aDate, RTL_TEXTENCODING_ASCII_US );
+        OString aStamp = OUStringToOString( m_aId, RTL_TEXTENCODING_ASCII_US );
+
+        // write information
+        aConfig.WriteKey( LOCKFILE_USERKEY,  aUser );
+        aConfig.WriteKey( LOCKFILE_HOSTKEY,  aHost );
+        aConfig.WriteKey( LOCKFILE_STAMPKEY, aStamp );
+        aConfig.WriteKey( LOCKFILE_TIMEKEY,  aTime );
+        aConfig.WriteKey(
+            LOCKFILE_IPCKEY,
+            m_bIPCserver ? OString("true") : OString("false") );
+        aConfig.Flush( );
+    }
+
+    Lockfile::~Lockfile()
+    {
+        // unlock userdata by removing file
+        if ( m_bRemove )
+            File::remove( m_aLockname );
+    }
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/component/dp_compbackenddb.cxx b/desktop/source/deployment/registry/component/dp_compbackenddb.cxx
new file mode 100644
index 000000000..fd9bb2c61
--- /dev/null
+++ b/desktop/source/deployment/registry/component/dp_compbackenddb.cxx
@@ -0,0 +1,131 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include "dp_compbackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/component-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"comp";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"component-backend-db";
+constexpr OUStringLiteral KEY_ELEMENT_NAME = u"component";
+
+namespace dp_registry::backend::component {
+
+ComponentBackendDb::ComponentBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):BackendDb(xContext, url)
+{
+
+}
+
+OUString ComponentBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString ComponentBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString ComponentBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString ComponentBackendDb::getKeyElementName()
+{
+    return KEY_ELEMENT_NAME;
+}
+
+void ComponentBackendDb::addEntry(OUString const & url, Data const & data)
+{
+    try{
+        if (!activateEntry(url))
+        {
+            Reference<css::xml::dom::XNode> componentNode = writeKeyElement(url);
+            writeSimpleElement(u"java-type-library",
+                               OUString::boolean(data.javaTypeLibrary),
+                               componentNode);
+
+            writeSimpleList(
+                data.implementationNames,
+                u"implementation-names",
+                u"name",
+                componentNode);
+
+            writeVectorOfPair(
+                data.singletons,
+                u"singletons",
+                u"item",
+                u"key",
+                u"value",
+                componentNode);
+
+            save();
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+ComponentBackendDb::Data ComponentBackendDb::getEntry(std::u16string_view url)
+{
+    try
+    {
+        ComponentBackendDb::Data retData;
+        Reference<css::xml::dom::XNode> aNode = getKeyElement(url);
+        if (aNode.is())
+        {
+            bool bJava = readSimpleElement(u"java-type-library", aNode) == "true";
+            retData.javaTypeLibrary = bJava;
+
+            retData.implementationNames =
+                readList( aNode, u"implementation-names", u"name");
+
+            retData.singletons =
+                readVectorOfPair( aNode, u"singletons", u"item", u"key", u"value");
+        }
+        return retData;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+
+} // namespace dp_registry::backend::component
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/component/dp_compbackenddb.hxx b/desktop/source/deployment/registry/component/dp_compbackenddb.hxx
new file mode 100644
index 000000000..84153b6fa
--- /dev/null
+++ b/desktop/source/deployment/registry/component/dp_compbackenddb.hxx
@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <rtl/string.hxx>
+#include <vector>
+#include <deque>
+#include <string_view>
+
+#include <dp_backenddb.hxx>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+namespace dp_registry::backend::component {
+
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+   The format looks like this:
+
+<?xml version="1.0"?>
+<component-backend-db xmlns="http://openoffice.org/extensionmanager/component-registry/2010">
+  <component url="vnd.sun.star.expand:$UNO_USER_PACKAGES_CACHE/uno_packages/5CD5.tmp_/leaves1.oxt/extensionoptions.jar">
+    <name>FileName</name>
+    <java-type-library>true</java-type-library>
+    <implementation-names>
+      <name>com.sun.star.comp.extensionoptions.OptionsEventHandler$_OptionsEventHandler</name>
+      ...
+    </implementation-names>
+    <singletons>
+      <item>
+        <key>com.sun.star.java.theJavaVirtualMachine</key>
+        <value>com.sun.star.java.JavaVirtualMachine</value>
+      </item>
+      ...
+    </singletons>
+  </component>
+
+  <component ...>
+  ...
+</component-backend-db>
+ */
+class ComponentBackendDb: public dp_registry::backend::BackendDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+    virtual OUString getNSPrefix() override;
+    virtual OUString getRootElementName() override;
+    virtual OUString getKeyElementName() override;
+
+public:
+    struct Data
+    {
+        Data(): javaTypeLibrary(false) {};
+
+        std::deque< OUString> implementationNames;
+        std::vector< std::pair< OUString, OUString> >singletons;
+            // map from singleton names to implementation names
+        bool javaTypeLibrary;
+    };
+
+public:
+
+    ComponentBackendDb( css::uno::Reference<css::uno::XComponentContext> const &  xContext,
+                        OUString const & url);
+
+    void addEntry(OUString const & url, Data const & data);
+
+    Data getEntry(std::u16string_view url);
+
+
+};
+
+
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/component/dp_component.cxx b/desktop/source/deployment/registry/component/dp_component.cxx
new file mode 100644
index 000000000..b9aa6518a
--- /dev/null
+++ b/desktop/source/deployment/registry/component/dp_component.cxx
@@ -0,0 +1,1720 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <strings.hrc>
+#include <dp_misc.h>
+#include <dp_shared.hxx>
+#include <dp_backend.h>
+#include <dp_platform.hxx>
+#include <dp_ucb.h>
+#include <rtl/string.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/uri.hxx>
+#include <sal/log.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <ucbhelper/content.hxx>
+#include <comphelper/sequence.hxx>
+#include <utility>
+#include <xmlscript/xml_helper.hxx>
+#include <svl/inettype.hxx>
+#include <tools/diagnose_ex.h>
+#include <o3tl/string_view.hxx>
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/container/XSet.hpp>
+#include <com/sun/star/registry/XSimpleRegistry.hpp>
+#include <com/sun/star/registry/XImplementationRegistration.hpp>
+#include <com/sun/star/loader/XImplementationLoader.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/ucb/NameClash.hpp>
+#include <com/sun/star/util/theMacroExpander.hpp>
+#include <algorithm>
+#include <deque>
+#include <memory>
+#include <string_view>
+#include <unordered_map>
+#include <vector>
+#include "dp_compbackenddb.hxx"
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend::component {
+namespace {
+
+/** return a vector of bootstrap variables which have been provided
+    as command arguments.
+*/
+std::vector<OUString> getCmdBootstrapVariables()
+{
+    std::vector<OUString> ret;
+    sal_uInt32 count = osl_getCommandArgCount();
+    for (sal_uInt32 i = 0; i < count; i++)
+    {
+        OUString arg;
+        osl_getCommandArg(i, &arg.pData);
+        if (arg.startsWith("-env:"))
+            ret.push_back(arg);
+    }
+    return ret;
+}
+
+bool jarManifestHeaderPresent(
+    OUString const & url, OUString const & name,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    OUString buf = "vnd.sun.star.zip://"
+        + ::rtl::Uri::encode(
+            url, rtl_UriCharClassRegName, rtl_UriEncodeIgnoreEscapes,
+            RTL_TEXTENCODING_UTF8 )
+        + "/META-INF/MANIFEST.MF";
+    ::ucbhelper::Content manifestContent;
+    OUString line;
+    return
+        create_ucb_content(
+            &manifestContent, buf, xCmdEnv,
+            false /* no throw */ )
+        && readLine( &line, name, manifestContent, RTL_TEXTENCODING_ASCII_US );
+}
+
+
+class BackendImpl : public ::dp_registry::backend::PackageRegistryBackend
+{
+    class ComponentPackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        const OUString m_loader;
+
+        enum class Reg { Uninit, Void, Registered, NotRegistered, MaybeRegistered };
+        Reg m_registered;
+
+        void getComponentInfo(
+            ComponentBackendDb::Data * data,
+            std::vector< css::uno::Reference< css::uno::XInterface > > *
+                factories,
+            Reference<XComponentContext> const & xContext );
+
+        void componentLiveInsertion(
+            ComponentBackendDb::Data const & data,
+            std::vector< css::uno::Reference< css::uno::XInterface > > const &
+                factories);
+
+        void componentLiveRemoval(ComponentBackendDb::Data const & data);
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+        Reference<registry::XSimpleRegistry> getRDB() const;
+
+    public:
+        ComponentPackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            OUString loader, bool bRemoved,
+            OUString const & identifier);
+    };
+    friend class ComponentPackageImpl;
+
+    class ComponentsPackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+    public:
+        ComponentsPackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool bRemoved, OUString const & identifier);
+    };
+    friend class ComponentsPackageImpl;
+
+    class TypelibraryPackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        const bool m_jarFile;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    public:
+        TypelibraryPackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool jarFile, bool bRemoved,
+            OUString const & identifier);
+    };
+    friend class TypelibraryPackageImpl;
+
+    /** Serves for unregistering packages that were registered on a
+        different platform. This can happen if one has remotely mounted
+        /home, for example.
+     */
+    class OtherPlatformPackageImpl : public ::dp_registry::backend::Package
+    {
+    public:
+        OtherPlatformPackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool bRemoved, OUString const & identifier, OUString platform);
+
+    private:
+        BackendImpl * getMyBackend() const;
+
+        Reference<registry::XSimpleRegistry> impl_openRDB() const;
+        Reference<XInterface> impl_createInstance(OUString const& rService) const;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    private:
+        OUString const m_aPlatform;
+    };
+    friend class OtherPlatformPackageImpl;
+
+    std::deque<OUString> m_jar_typelibs;
+    std::deque<OUString> m_rdb_typelibs;
+    std::deque<OUString> m_components;
+
+    enum RcItem { RCITEM_JAR_TYPELIB, RCITEM_RDB_TYPELIB, RCITEM_COMPONENTS };
+
+    std::deque<OUString> & getRcItemList( RcItem kind ) {
+        switch (kind)
+        {
+        case RCITEM_JAR_TYPELIB:
+            return m_jar_typelibs;
+        case RCITEM_RDB_TYPELIB:
+            return m_rdb_typelibs;
+        default: // case RCITEM_COMPONENTS
+            return m_components;
+        }
+    }
+
+    bool m_unorc_inited;
+    bool m_unorc_modified;
+    bool bSwitchedRdbFiles;
+
+    typedef std::unordered_map< OUString, Reference<XInterface> > t_string2object;
+    t_string2object m_backendObjects;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL disposing() override;
+
+    const Reference<deployment::XPackageTypeInfo> m_xDynComponentTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xJavaComponentTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xPythonComponentTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xComponentsTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xRDBTypelibTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xJavaTypelibTypeInfo;
+    Sequence< Reference<deployment::XPackageTypeInfo> > m_typeInfos;
+
+    OUString m_commonRDB;
+    OUString m_nativeRDB;
+
+    //URLs of the original rdbs (before any switching):
+    OUString m_commonRDB_orig;
+    OUString m_nativeRDB_orig;
+
+    std::unique_ptr<ComponentBackendDb> m_backendDb;
+
+    void addDataToDb(OUString const & url, ComponentBackendDb::Data const & data);
+    ComponentBackendDb::Data readDataFromDb(std::u16string_view url);
+    void revokeEntryFromDb(std::u16string_view url);
+
+    Reference<registry::XSimpleRegistry> m_xCommonRDB;
+    Reference<registry::XSimpleRegistry> m_xNativeRDB;
+
+    void unorc_verify_init( Reference<XCommandEnvironment> const & xCmdEnv );
+    void unorc_flush( Reference<XCommandEnvironment> const & xCmdEnv );
+
+    Reference<XInterface> getObject( OUString const & id );
+    Reference<XInterface> insertObject(
+        OUString const & id, Reference<XInterface> const & xObject );
+    void releaseObject( OUString const & id );
+
+    void addToUnoRc( RcItem kind, OUString const & url,
+                     Reference<XCommandEnvironment> const & xCmdEnv );
+    void removeFromUnoRc( RcItem kind, OUString const & url,
+                          Reference<XCommandEnvironment> const & xCmdEnv );
+    bool hasInUnoRc( RcItem kind, OUString const & url );
+
+    css::uno::Reference< css::uno::XComponentContext > getRootContext() const;
+
+public:
+    BackendImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+    using PackageRegistryBackend::disposing;
+
+    //Will be called from ComponentPackageImpl
+    void initServiceRdbFiles();
+};
+
+
+BackendImpl::ComponentPackageImpl::ComponentPackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url, OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    OUString loader, bool bRemoved,
+    OUString const & identifier)
+    : Package( myBackend, url, name, name /* display-name */,
+               xPackageType, bRemoved, identifier),
+      m_loader(std::move( loader )),
+      m_registered( Reg::Uninit )
+{}
+
+Reference<registry::XSimpleRegistry>
+BackendImpl::ComponentPackageImpl::getRDB() const
+{
+    BackendImpl * that = getMyBackend();
+
+    //Late "initialization" of the services rdb files
+    //This is to prevent problems when running several
+    //instances of OOo with root rights in parallel. This
+    //would otherwise cause problems when copying the rdbs.
+    //See  http://qa.openoffice.org/issues/show_bug.cgi?id=99257
+    {
+        const ::osl::MutexGuard guard( m_aMutex );
+        if (!that->bSwitchedRdbFiles)
+        {
+            that->bSwitchedRdbFiles = true;
+            that->initServiceRdbFiles();
+        }
+    }
+    if ( m_loader == "com.sun.star.loader.SharedLibrary" )
+        return that->m_xNativeRDB;
+    else
+        return that->m_xCommonRDB;
+}
+
+BackendImpl * BackendImpl::ComponentPackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //Throws a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException(
+            "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<ComponentPackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+
+void BackendImpl::disposing()
+{
+    try {
+        m_backendObjects = t_string2object();
+        if (m_xNativeRDB.is()) {
+            m_xNativeRDB->close();
+            m_xNativeRDB.clear();
+        }
+        if (m_xCommonRDB.is()) {
+            m_xCommonRDB->close();
+            m_xCommonRDB.clear();
+        }
+        unorc_flush( Reference<XCommandEnvironment>() );
+
+        PackageRegistryBackend::disposing();
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        throw lang::WrappedTargetRuntimeException(
+            "caught unexpected exception while disposing...",
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+void BackendImpl::initServiceRdbFiles()
+{
+    const Reference<XCommandEnvironment> xCmdEnv;
+
+    ::ucbhelper::Content cacheDir( getCachePath(), xCmdEnv, m_xComponentContext );
+    ::ucbhelper::Content oldRDB;
+    // switch common rdb:
+    if (!m_commonRDB_orig.isEmpty())
+    {
+        (void)create_ucb_content(
+            &oldRDB, makeURL( getCachePath(), m_commonRDB_orig),
+            xCmdEnv, false /* no throw */ );
+    }
+    m_commonRDB = m_commonRDB_orig == "common.rdb" ? std::u16string_view(u"common_.rdb") : std::u16string_view(u"common.rdb");
+    if (oldRDB.get().is())
+    {
+        cacheDir.transferContent(
+                oldRDB, ::ucbhelper::InsertOperation::Copy,
+                m_commonRDB, NameClash::OVERWRITE );
+        oldRDB = ::ucbhelper::Content();
+    }
+    // switch native rdb:
+    if (!m_nativeRDB_orig.isEmpty())
+    {
+        (void)create_ucb_content(
+            &oldRDB, makeURL(getCachePath(), m_nativeRDB_orig),
+            xCmdEnv, false /* no throw */ );
+    }
+    const OUString plt_rdb( getPlatformString() + ".rdb" );
+    const OUString plt_rdb_( getPlatformString() + "_.rdb" );
+    m_nativeRDB = (m_nativeRDB_orig == plt_rdb ) ? plt_rdb_ : plt_rdb;
+    if (oldRDB.get().is())
+    {
+        cacheDir.transferContent(
+                oldRDB, ::ucbhelper::InsertOperation::Copy,
+                m_nativeRDB, NameClash::OVERWRITE );
+    }
+
+    // UNO is bootstrapped, flush for next process start:
+    m_unorc_modified = true;
+    unorc_flush( Reference<XCommandEnvironment>() );
+
+
+    // common rdb for java, native rdb for shared lib components
+    if (!m_commonRDB.isEmpty()) {
+        m_xCommonRDB.set(
+            m_xComponentContext->getServiceManager()
+            ->createInstanceWithContext(
+            "com.sun.star.registry.SimpleRegistry",
+            m_xComponentContext ), UNO_QUERY_THROW );
+        m_xCommonRDB->open(
+            makeURL( expandUnoRcUrl(getCachePath()), m_commonRDB ),
+            false, true);
+    }
+    if (!m_nativeRDB.isEmpty()) {
+        m_xNativeRDB.set(
+            m_xComponentContext->getServiceManager()
+            ->createInstanceWithContext(
+            "com.sun.star.registry.SimpleRegistry",
+            m_xComponentContext ), UNO_QUERY_THROW );
+        m_xNativeRDB->open(
+            makeURL( expandUnoRcUrl(getCachePath()), m_nativeRDB ),
+            false, true);
+    }
+}
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : PackageRegistryBackend( args, xComponentContext ),
+      m_unorc_inited( false ),
+      m_unorc_modified( false ),
+      bSwitchedRdbFiles(false),
+      m_xDynComponentTypeInfo( new Package::TypeInfo(
+             "application/vnd.sun.star.uno-component;type=native;platform=" +
+                                   getPlatformString(),
+                                   "*" SAL_DLLEXTENSION,
+                                   DpResId(RID_STR_DYN_COMPONENT)
+                                   ) ),
+      m_xJavaComponentTypeInfo( new Package::TypeInfo(
+             "application/vnd.sun.star.uno-component;type=Java",
+                                    "*.jar",
+                                    DpResId(RID_STR_JAVA_COMPONENT)
+                                    ) ),
+      m_xPythonComponentTypeInfo( new Package::TypeInfo(
+             "application/vnd.sun.star.uno-component;type=Python",
+                                      "*.py",
+                                      DpResId(
+                                          RID_STR_PYTHON_COMPONENT)
+                                      ) ),
+      m_xComponentsTypeInfo( new Package::TypeInfo(
+                                 "application/vnd.sun.star.uno-components",
+                                 "*.components",
+                                 DpResId(RID_STR_COMPONENTS)
+                                 ) ),
+      m_xRDBTypelibTypeInfo( new Package::TypeInfo(
+             "application/vnd.sun.star.uno-typelibrary;type=RDB",
+                                 "*.rdb",
+                                 DpResId(RID_STR_RDB_TYPELIB)
+                                 ) ),
+      m_xJavaTypelibTypeInfo( new Package::TypeInfo(
+             "application/vnd.sun.star.uno-typelibrary;type=Java",
+                                  "*.jar",
+                                  DpResId(RID_STR_JAVA_TYPELIB)
+                                  ) ),
+      m_typeInfos{ m_xDynComponentTypeInfo, m_xJavaComponentTypeInfo, m_xPythonComponentTypeInfo,
+                   m_xComponentsTypeInfo, m_xRDBTypelibTypeInfo, m_xJavaTypelibTypeInfo }
+{
+    const Reference<XCommandEnvironment> xCmdEnv;
+
+    if (transientMode())
+    {
+        // in-mem rdbs:
+        // common rdb for java, native rdb for shared lib components
+        m_xCommonRDB.set(
+            xComponentContext->getServiceManager()->createInstanceWithContext(
+                "com.sun.star.registry.SimpleRegistry",
+                xComponentContext ), UNO_QUERY_THROW );
+        m_xCommonRDB->open( OUString() /* in-mem */,
+                            false /* ! read-only */, true /* create */ );
+        m_xNativeRDB.set(
+            xComponentContext->getServiceManager()->createInstanceWithContext(
+                "com.sun.star.registry.SimpleRegistry",
+                xComponentContext ), UNO_QUERY_THROW );
+        m_xNativeRDB->open( OUString() /* in-mem */,
+                            false /* ! read-only */, true /* create */ );
+    }
+    else
+    {
+        unorc_verify_init( xCmdEnv );
+        OUString dbFile = makeURL(getCachePath(), "backenddb.xml");
+        m_backendDb.reset(
+            new ComponentBackendDb(getComponentContext(), dbFile));
+    }
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.component.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+void BackendImpl::addDataToDb(
+    OUString const & url, ComponentBackendDb::Data const & data)
+{
+    if (m_backendDb)
+        m_backendDb->addEntry(url, data);
+}
+
+ComponentBackendDb::Data BackendImpl::readDataFromDb(std::u16string_view url)
+{
+    ComponentBackendDb::Data data;
+    if (m_backendDb)
+        data = m_backendDb->getEntry(url);
+    return data;
+}
+
+void BackendImpl::revokeEntryFromDb(std::u16string_view url)
+{
+    if (m_backendDb)
+        m_backendDb->revokeEntry(url);
+}
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return m_typeInfos;
+}
+
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_,
+    bool bRemoved, OUString const & identifier,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    OUString mediaType(mediaType_);
+    if ( mediaType.isEmpty() || mediaType == "application/vnd.sun.star.uno-component" || mediaType == "application/vnd.sun.star.uno-typelibrary" )
+    {
+        // detect exact media-type:
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, url, xCmdEnv )) {
+            const OUString title( StrTitle::getTitle( ucbContent ) );
+            if (title.endsWithIgnoreAsciiCase(SAL_DLLEXTENSION))
+            {
+                mediaType = "application/vnd.sun.star.uno-component;type=native;platform=" +
+                    getPlatformString();
+            }
+            else if (title.endsWithIgnoreAsciiCase(".jar"))
+            {
+                if (jarManifestHeaderPresent(
+                        url, "RegistrationClassName", xCmdEnv ))
+                    mediaType = "application/vnd.sun.star.uno-component;type=Java";
+                if (mediaType.isEmpty())
+                    mediaType = "application/vnd.sun.star.uno-typelibrary;type=Java";
+            }
+            else if (title.endsWithIgnoreAsciiCase(".py"))
+                mediaType = "application/vnd.sun.star.uno-component;type=Python";
+            else if (title.endsWithIgnoreAsciiCase(".rdb"))
+                mediaType = "application/vnd.sun.star.uno-typelibrary;type=RDB";
+        }
+        if (mediaType.isEmpty())
+            throw lang::IllegalArgumentException(
+                StrCannotDetectMediaType() + url,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            OUString name;
+            if (!bRemoved)
+            {
+                ::ucbhelper::Content ucbContent( url, xCmdEnv, m_xComponentContext );
+                name = StrTitle::getTitle( ucbContent );
+            }
+
+            if (subType.equalsIgnoreAsciiCase("vnd.sun.star.uno-component"))
+            {
+                // xxx todo: probe and evaluate component xml description
+
+                auto const iter = params.find(OString("platform"));
+                bool bPlatformFits(iter == params.end());
+                OUString aPlatform;
+                if (!bPlatformFits) // platform is specified, we have to check
+                {
+                    aPlatform = iter->second.m_sValue;
+                    bPlatformFits = platform_fits(aPlatform);
+                }
+                // If the package is being removed, do not care whether
+                // platform fits. We won't be using it anyway.
+                if (bPlatformFits || bRemoved) {
+                    auto const iterType = params.find(OString("type"));
+                    if (iterType != params.end())
+                    {
+                        OUString const & value = iterType->second.m_sValue;
+                        if (value.equalsIgnoreAsciiCase("native")) {
+                            if (bPlatformFits)
+                                return new BackendImpl::ComponentPackageImpl(
+                                    this, url, name, m_xDynComponentTypeInfo,
+                                    "com.sun.star.loader.SharedLibrary",
+                                    bRemoved, identifier);
+                            else
+                                return new BackendImpl::OtherPlatformPackageImpl(
+                                    this, url, name, m_xDynComponentTypeInfo,
+                                    bRemoved, identifier, aPlatform);
+                        }
+                        if (value.equalsIgnoreAsciiCase("Java")) {
+                            return new BackendImpl::ComponentPackageImpl(
+                                this, url, name, m_xJavaComponentTypeInfo,
+                                "com.sun.star.loader.Java2",
+                                bRemoved, identifier);
+                        }
+                        if (value.equalsIgnoreAsciiCase("Python")) {
+                            return new BackendImpl::ComponentPackageImpl(
+                                this, url, name, m_xPythonComponentTypeInfo,
+                                "com.sun.star.loader.Python",
+                                bRemoved, identifier);
+                        }
+                    }
+                }
+            }
+            else if (subType.equalsIgnoreAsciiCase("vnd.sun.star.uno-components"))
+            {
+                auto const iter = params.find(OString("platform"));
+                if (iter == params.end() || platform_fits(iter->second.m_sValue)) {
+                    return new BackendImpl::ComponentsPackageImpl(
+                        this, url, name, m_xComponentsTypeInfo, bRemoved,
+                        identifier);
+                }
+            }
+            else if (subType.equalsIgnoreAsciiCase( "vnd.sun.star.uno-typelibrary"))
+            {
+                auto const iter = params.find(OString("type"));
+                if (iter != params.end()) {
+                    OUString const & value = iter->second.m_sValue;
+                    if (value.equalsIgnoreAsciiCase("RDB"))
+                    {
+                        return new BackendImpl::TypelibraryPackageImpl(
+                            this, url, name, m_xRDBTypelibTypeInfo,
+                            false /* rdb */, bRemoved, identifier);
+                    }
+                    if (value.equalsIgnoreAsciiCase("Java")) {
+                        return new BackendImpl::TypelibraryPackageImpl(
+                            this, url, name, m_xJavaTypelibTypeInfo,
+                            true /* jar */, bRemoved, identifier);
+                    }
+                }
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+
+void BackendImpl::unorc_verify_init(
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (transientMode())
+        return;
+    const ::osl::MutexGuard guard( m_aMutex );
+    if ( m_unorc_inited)
+        return;
+
+    // common rc:
+    ::ucbhelper::Content ucb_content;
+    if (create_ucb_content(
+            &ucb_content,
+            makeURL( getCachePath(), "unorc" ),
+            xCmdEnv, false /* no throw */ ))
+    {
+        OUString line;
+        if (readLine( &line, "UNO_JAVA_CLASSPATH=", ucb_content,
+                      RTL_TEXTENCODING_UTF8 ))
+        {
+            sal_Int32 index = sizeof ("UNO_JAVA_CLASSPATH=") - 1;
+            do {
+                OUString token( o3tl::trim(o3tl::getToken(line, 0, ' ', index )) );
+                if (!token.isEmpty())
+                {
+                    if (create_ucb_content(
+                            nullptr, expandUnoRcTerm(token), xCmdEnv,
+                            false /* no throw */ ))
+                    {
+                        //The jar file may not exist anymore if a shared or bundled
+                        //extension was removed, but it can still be in the unorc
+                        //After running XExtensionManager::synchronize, the unorc is
+                        //cleaned up
+                        m_jar_typelibs.push_back( token );
+                    }
+                }
+            }
+            while (index >= 0);
+        }
+        if (readLine( &line, "UNO_TYPES=", ucb_content,
+                      RTL_TEXTENCODING_UTF8 )) {
+            sal_Int32 index = sizeof ("UNO_TYPES=") - 1;
+            do {
+                OUString token( o3tl::trim(o3tl::getToken(line, 0, ' ', index )) );
+                if (!token.isEmpty())
+                {
+                    if (token[ 0 ] == '?')
+                        token = token.copy( 1 );
+                    if (create_ucb_content(
+                            nullptr, expandUnoRcTerm(token), xCmdEnv,
+                            false /* no throw */ ))
+                    {
+                         //The RDB file may not exist anymore if a shared or bundled
+                         //extension was removed, but it can still be in the unorc.
+                         //After running XExtensionManager::synchronize, the unorc is
+                         //cleaned up
+                         m_rdb_typelibs.push_back( token );
+                    }
+                }
+            }
+            while (index >= 0);
+        }
+        if (readLine( &line, "UNO_SERVICES=", ucb_content,
+                      RTL_TEXTENCODING_UTF8 ))
+        {
+            // The UNO_SERVICES line always has the BNF form
+            //  "UNO_SERVICES="
+            //  ("?$ORIGIN/" <common-rdb>)?                        -- first
+            //  "${$ORIGIN/${_OS}_${_ARCH}rc:UNO_SERVICES}"?       -- second
+            //  ("?" ("BUNDLED_EXTENSIONS" |                       -- third
+            //   "UNO_SHARED_PACKAGES_CACHE" | "UNO_USER_PACKAGES_CACHE")
+            //   ...)*
+            // so can unambiguously be split into its three parts:
+            int state = 1;
+            for (sal_Int32 i = RTL_CONSTASCII_LENGTH("UNO_SERVICES=");
+                 i >= 0;)
+            {
+                OUString token(line.getToken(0, ' ', i));
+                if (!token.isEmpty())
+                {
+                    if (state == 1 && token.match("?$ORIGIN/"))
+                    {
+                        m_commonRDB_orig = token.copy(
+                            RTL_CONSTASCII_LENGTH("?$ORIGIN/"));
+                        state = 2;
+                    }
+                    else if ( state <= 2 && token == "${$ORIGIN/${_OS}_${_ARCH}rc:UNO_SERVICES}" )
+                    {
+                        state = 3;
+                    }
+                    else
+                    {
+                        if (token[0] == '?')
+                        {
+                            token = token.copy(1);
+                        }
+                        m_components.push_back(token);
+                        state = 3;
+                    }
+                }
+            }
+        }
+
+        // native rc:
+        if (create_ucb_content(
+                &ucb_content,
+                makeURL( getCachePath(), getPlatformString() + "rc"),
+                xCmdEnv, false /* no throw */ )) {
+            if (readLine( &line, "UNO_SERVICES=", ucb_content,
+                          RTL_TEXTENCODING_UTF8 )) {
+                m_nativeRDB_orig = line.copy(
+                    sizeof ("UNO_SERVICES=?$ORIGIN/") - 1 );
+            }
+        }
+    }
+    m_unorc_modified = false;
+    m_unorc_inited = true;
+}
+
+
+void BackendImpl::unorc_flush( Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (transientMode())
+        return;
+    if (!m_unorc_inited || !m_unorc_modified)
+        return;
+
+    OStringBuffer buf;
+
+    buf.append("ORIGIN=");
+    OUString sOrigin = dp_misc::makeRcTerm(m_cachePath);
+    OString osOrigin = OUStringToOString(sOrigin, RTL_TEXTENCODING_UTF8);
+    buf.append(osOrigin);
+    buf.append(LF);
+
+    if (! m_jar_typelibs.empty())
+    {
+        auto iPos( m_jar_typelibs.cbegin() );
+        auto const iEnd( m_jar_typelibs.cend() );
+        buf.append( "UNO_JAVA_CLASSPATH=" );
+        while (iPos != iEnd) {
+            // encoded ASCII file-urls:
+            const OString item(
+                OUStringToOString( *iPos, RTL_TEXTENCODING_ASCII_US ) );
+            buf.append( item );
+            ++iPos;
+            if (iPos != iEnd)
+                buf.append( ' ' );
+        }
+        buf.append(LF);
+    }
+    if (! m_rdb_typelibs.empty())
+    {
+        auto iPos( m_rdb_typelibs.cbegin() );
+        auto const iEnd( m_rdb_typelibs.cend() );
+        buf.append( "UNO_TYPES=" );
+        while (iPos != iEnd) {
+            buf.append( '?' );
+            // encoded ASCII file-urls:
+            const OString item(
+                OUStringToOString( *iPos, RTL_TEXTENCODING_ASCII_US ) );
+            buf.append( item );
+            ++iPos;
+            if (iPos != iEnd)
+                buf.append( ' ' );
+        }
+        buf.append(LF);
+    }
+
+    // If we duplicated the common or native rdb then we must use those urls
+    //otherwise we use those of the original files. That is, m_commonRDB_orig
+    //and m_nativeRDB_orig;
+    OUString sCommonRDB(m_commonRDB.isEmpty() ? m_commonRDB_orig : m_commonRDB );
+    OUString sNativeRDB(m_nativeRDB.isEmpty() ? m_nativeRDB_orig : m_nativeRDB );
+
+    if (!sCommonRDB.isEmpty() || !sNativeRDB.isEmpty() ||
+        !m_components.empty())
+    {
+        buf.append( "UNO_SERVICES=" );
+        bool space = false;
+        if (!sCommonRDB.isEmpty())
+        {
+            buf.append( "?$ORIGIN/" );
+            buf.append( OUStringToOString(
+                            sCommonRDB, RTL_TEXTENCODING_ASCII_US ) );
+            space = true;
+        }
+        if (!sNativeRDB.isEmpty())
+        {
+            if (space)
+            {
+                buf.append(' ');
+            }
+            buf.append( "${$ORIGIN/${_OS}_${_ARCH}rc:UNO_SERVICES}" );
+            space = true;
+
+            // write native rc:
+            OString buf2 =
+                "ORIGIN=" +
+                osOrigin +
+                OStringChar(LF) +
+                "UNO_SERVICES=?$ORIGIN/"  +
+                OUStringToOString( sNativeRDB, RTL_TEXTENCODING_ASCII_US ) +
+                OStringChar(LF);
+
+            const Reference<io::XInputStream> xData(
+                ::xmlscript::createInputStream(
+                        reinterpret_cast<sal_Int8 const *>(buf2.getStr()),
+                        buf2.getLength() ) );
+            ::ucbhelper::Content ucb_content(
+                makeURL( getCachePath(), getPlatformString() + "rc" ),
+                xCmdEnv, m_xComponentContext );
+            ucb_content.writeStream( xData, true /* replace existing */ );
+        }
+        for (auto const& component : m_components)
+        {
+            if (space)
+            {
+                buf.append(' ');
+            }
+            buf.append('?');
+            buf.append(OUStringToOString(component, RTL_TEXTENCODING_UTF8));
+            space = true;
+        }
+        buf.append(LF);
+    }
+
+    // write unorc:
+    const Reference<io::XInputStream> xData(
+        ::xmlscript::createInputStream(
+                reinterpret_cast<sal_Int8 const *>(buf.getStr()),
+                buf.getLength() ) );
+    ::ucbhelper::Content ucb_content(
+        makeURL( getCachePath(), "unorc" ), xCmdEnv, m_xComponentContext );
+    ucb_content.writeStream( xData, true /* replace existing */ );
+
+    m_unorc_modified = false;
+}
+
+
+void BackendImpl::addToUnoRc( RcItem kind, OUString const & url_,
+                              Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    const OUString rcterm( dp_misc::makeRcTerm(url_) );
+    const ::osl::MutexGuard guard( m_aMutex );
+    unorc_verify_init( xCmdEnv );
+    std::deque<OUString> & rSet = getRcItemList(kind);
+    if (std::find( rSet.begin(), rSet.end(), rcterm ) == rSet.end()) {
+        rSet.push_front( rcterm ); // prepend to list, thus overriding
+        // write immediately:
+        m_unorc_modified = true;
+        unorc_flush( xCmdEnv );
+    }
+}
+
+
+void BackendImpl::removeFromUnoRc(
+    RcItem kind, OUString const & url_,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    const OUString rcterm( dp_misc::makeRcTerm(url_) );
+    const ::osl::MutexGuard guard( m_aMutex );
+    unorc_verify_init( xCmdEnv );
+    std::deque<OUString> & aRcItemList = getRcItemList(kind);
+    aRcItemList.erase(std::remove(aRcItemList.begin(), aRcItemList.end(), rcterm), aRcItemList.end());
+    // write immediately:
+    m_unorc_modified = true;
+    unorc_flush( xCmdEnv );
+}
+
+
+bool BackendImpl::hasInUnoRc(
+    RcItem kind, OUString const & url_ )
+{
+    const OUString rcterm( dp_misc::makeRcTerm(url_) );
+    const ::osl::MutexGuard guard( m_aMutex );
+    std::deque<OUString> const & rSet = getRcItemList(kind);
+    return std::find( rSet.begin(), rSet.end(), rcterm ) != rSet.end();
+}
+
+css::uno::Reference< css::uno::XComponentContext > BackendImpl::getRootContext()
+    const
+{
+    css::uno::Reference< css::uno::XComponentContext > rootContext(
+        getComponentContext()->getValueByName("_root"),
+        css::uno::UNO_QUERY);
+    return rootContext.is() ? rootContext : getComponentContext();
+}
+
+
+void BackendImpl::releaseObject( OUString const & id )
+{
+    const ::osl::MutexGuard guard( m_aMutex );
+    m_backendObjects.erase( id );
+}
+
+
+Reference<XInterface> BackendImpl::getObject( OUString const & id )
+{
+    const ::osl::MutexGuard guard( m_aMutex );
+    const t_string2object::const_iterator iFind( m_backendObjects.find( id ) );
+    if (iFind == m_backendObjects.end())
+        return Reference<XInterface>();
+    else
+        return iFind->second;
+}
+
+
+Reference<XInterface> BackendImpl::insertObject(
+    OUString const & id, Reference<XInterface> const & xObject )
+{
+    const ::osl::MutexGuard guard( m_aMutex );
+    const std::pair<t_string2object::iterator, bool> insertion(
+        m_backendObjects.emplace( id, xObject ) );
+    return insertion.first->second;
+}
+
+
+Reference<XComponentContext> raise_uno_process(
+    Reference<XComponentContext> const & xContext,
+    ::rtl::Reference<AbortChannel> const & abortChannel )
+{
+    OSL_ASSERT( xContext.is() );
+
+    OUString url( util::theMacroExpander::get(xContext)->expandMacros( "$URE_BIN_DIR/uno" ) );
+
+    const OUString connectStr = "uno:pipe,name=" + generateRandomPipeId() + ";urp;uno.ComponentContext";
+
+    // raise core UNO process to register/run a component,
+    // javavm service uses unorc next to executable to retrieve deployed
+    // jar typelibs
+
+    std::vector<OUString> args{
+#if OSL_DEBUG_LEVEL == 0
+        "--quiet",
+#endif
+        "--singleaccept",
+        "-u",
+        connectStr,
+        // don't inherit from unorc:
+        "-env:INIFILENAME=" };
+
+    //now add the bootstrap variables which were supplied on the command line
+    std::vector<OUString> bootvars = getCmdBootstrapVariables();
+    args.insert(args.end(), bootvars.begin(), bootvars.end());
+
+    oslProcess hProcess;
+    try {
+        hProcess = raiseProcess(
+            url, comphelper::containerToSequence(args) );
+    }
+    catch (...) {
+        OUStringBuffer sMsg = "error starting process: " + url;
+        for(const auto& arg : args)
+            sMsg.append(" " + arg);
+        throw uno::RuntimeException(sMsg.makeStringAndClear());
+    }
+    try {
+        return Reference<XComponentContext>(
+            resolveUnoURL( connectStr, xContext, abortChannel.get() ),
+            UNO_QUERY_THROW );
+    }
+    catch (...) {
+        // try to terminate process:
+        if ( osl_terminateProcess( hProcess ) != osl_Process_E_None )
+        {
+            OSL_ASSERT( false );
+        }
+        throw;
+    }
+}
+
+void extractComponentData(
+    css::uno::Reference< css::uno::XComponentContext > const & context,
+    css::uno::Reference< css::registry::XRegistryKey > const & registry,
+    ComponentBackendDb::Data * data,
+    std::vector< css::uno::Reference< css::uno::XInterface > > * factories,
+    css::uno::Reference< css::loader::XImplementationLoader > const &
+        componentLoader,
+    OUString const & componentUrl)
+{
+    OSL_ASSERT(
+        context.is() && registry.is() && data != nullptr && componentLoader.is());
+    OUString registryName(registry->getKeyName());
+    sal_Int32 prefix = registryName.getLength();
+    if (!registryName.endsWith("/")) {
+        prefix += RTL_CONSTASCII_LENGTH("/");
+    }
+    const css::uno::Sequence< css::uno::Reference< css::registry::XRegistryKey > >
+        keys(registry->openKeys());
+    css::uno::Reference< css::lang::XMultiComponentFactory > smgr(
+        context->getServiceManager(), css::uno::UNO_SET_THROW);
+    for (css::uno::Reference< css::registry::XRegistryKey > const & key : keys) {
+        OUString name(key->getKeyName().copy(prefix));
+        data->implementationNames.push_back(name);
+        css::uno::Reference< css::registry::XRegistryKey > singletons(
+            key->openKey("UNO/SINGLETONS"));
+        if (singletons.is()) {
+            sal_Int32 prefix2 = key->getKeyName().getLength() +
+                RTL_CONSTASCII_LENGTH("/UNO/SINGLETONS/");
+            const css::uno::Sequence<
+                css::uno::Reference< css::registry::XRegistryKey > >
+                singletonKeys(singletons->openKeys());
+            for (css::uno::Reference< css::registry::XRegistryKey > const & singletonKey : singletonKeys) {
+                data->singletons.emplace_back(
+                        singletonKey->getKeyName().copy(prefix2), name);
+            }
+        }
+        if (factories != nullptr) {
+            factories->push_back(
+                componentLoader->activate(
+                    name, OUString(), componentUrl, key));
+        }
+    }
+}
+
+void BackendImpl::ComponentPackageImpl::getComponentInfo(
+    ComponentBackendDb::Data * data,
+    std::vector< css::uno::Reference< css::uno::XInterface > > * factories,
+    Reference<XComponentContext> const & xContext )
+{
+    const Reference<loader::XImplementationLoader> xLoader(
+        xContext->getServiceManager()->createInstanceWithContext(
+            m_loader, xContext ), UNO_QUERY );
+    if (! xLoader.is())
+    {
+        throw css::deployment::DeploymentException(
+            "cannot instantiate loader " + m_loader,
+            static_cast< OWeakObject * >(this), Any());
+    }
+
+    // HACK: highly dependent on stoc/source/servicemanager
+    //       and stoc/source/implreg implementation which rely on the same
+    //       services.rdb format!
+    //       .../UNO/LOCATION and .../UNO/ACTIVATOR appear not to be written by
+    //       writeRegistryInfo, however, but are known, fixed values here, so
+    //       can be passed into extractComponentData
+    OUString url(getURL());
+    const Reference<registry::XSimpleRegistry> xMemReg(
+        xContext->getServiceManager()->createInstanceWithContext(
+            "com.sun.star.registry.SimpleRegistry", xContext ),
+        UNO_QUERY_THROW );
+    xMemReg->open( OUString() /* in mem */, false, true );
+    xLoader->writeRegistryInfo( xMemReg->getRootKey(), OUString(), url );
+    extractComponentData(
+        xContext, xMemReg->getRootKey(), data, factories, xLoader, url);
+}
+
+void BackendImpl::ComponentPackageImpl::componentLiveInsertion(
+    ComponentBackendDb::Data const & data,
+    std::vector< css::uno::Reference< css::uno::XInterface > > const &
+        factories)
+{
+    css::uno::Reference< css::uno::XComponentContext > rootContext(
+        getMyBackend()->getRootContext());
+    css::uno::Reference< css::container::XSet > set(
+        rootContext->getServiceManager(), css::uno::UNO_QUERY_THROW);
+    std::vector< css::uno::Reference< css::uno::XInterface > >::const_iterator
+        factory(factories.begin());
+    for (auto const& implementationName : data.implementationNames)
+    {
+        try {
+            set->insert(css::uno::Any(*factory++));
+        } catch (const container::ElementExistException &) {
+            SAL_WARN("desktop.deployment", "implementation already registered " << implementationName);
+        }
+    }
+    if (data.singletons.empty())        return;
+
+    css::uno::Reference< css::container::XNameContainer > cont(
+        rootContext, css::uno::UNO_QUERY_THROW);
+    for (auto const& singleton : data.singletons)
+    {
+        OUString name("/singletons/" + singleton.first);
+        //TODO: Update should be atomic:
+        try {
+            cont->removeByName( name + "/arguments");
+        } catch (const container::NoSuchElementException &) {}
+        try {
+            cont->insertByName( name + "/service", css::uno::Any(singleton.second));
+        } catch (const container::ElementExistException &) {
+            cont->replaceByName( name + "/service", css::uno::Any(singleton.second));
+        }
+        try {
+            cont->insertByName(name, css::uno::Any());
+        } catch (const container::ElementExistException &) {
+            SAL_WARN("desktop.deployment", "singleton already registered " << singleton.first);
+            cont->replaceByName(name, css::uno::Any());
+        }
+    }
+}
+
+void BackendImpl::ComponentPackageImpl::componentLiveRemoval(
+    ComponentBackendDb::Data const & data)
+{
+    css::uno::Reference< css::uno::XComponentContext > rootContext(
+        getMyBackend()->getRootContext());
+    css::uno::Reference< css::container::XSet > set(
+        rootContext->getServiceManager(), css::uno::UNO_QUERY_THROW);
+    for (auto const& implementationName : data.implementationNames)
+    {
+        try {
+            set->remove(css::uno::Any(implementationName));
+        } catch (const css::container::NoSuchElementException &) {
+            // ignore if factory has not been live deployed
+        }
+    }
+    if (data.singletons.empty())
+        return;
+
+    css::uno::Reference< css::container::XNameContainer > cont(
+        rootContext, css::uno::UNO_QUERY_THROW);
+    for (auto const& singleton : data.singletons)
+    {
+        OUString name("/singletons/" + singleton.first);
+        //TODO: Removal should be atomic:
+        try {
+            cont->removeByName(name);
+        } catch (const container::NoSuchElementException &) {}
+        try {
+            cont->removeByName( name + "/service" );
+        } catch (const container::NoSuchElementException &) {}
+        try {
+            cont->removeByName( name + "/arguments" );
+        } catch (const container::NoSuchElementException &) {}
+    }
+}
+
+// Package
+
+//We could use here BackendImpl::hasActiveEntry. However, this check is just as well.
+//And it also shows the problem if another extension has overwritten an implementation
+//entry, because it contains the same service implementation
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::ComponentPackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<XCommandEnvironment> const & )
+{
+    if (m_registered == Reg::Uninit)
+    {
+        m_registered = Reg::NotRegistered;
+        const Reference<registry::XSimpleRegistry> xRDB( getRDB() );
+        if (xRDB.is())
+        {
+            bool bAmbiguousComponentName = false;
+            // lookup rdb for location URL:
+            const Reference<registry::XRegistryKey> xRootKey(
+                xRDB->getRootKey() );
+            const Reference<registry::XRegistryKey> xImplKey(
+                xRootKey->openKey( "IMPLEMENTATIONS" ) );
+            Sequence<OUString> implNames;
+            if (xImplKey.is() && xImplKey->isValid())
+                implNames = xImplKey->getKeyNames();
+            OUString const * pImplNames = implNames.getConstArray();
+            sal_Int32 pos = implNames.getLength();
+            for ( ; pos--; )
+            {
+                checkAborted( abortChannel );
+                const OUString key(
+                    pImplNames[ pos ] + "/UNO/LOCATION" );
+                const Reference<registry::XRegistryKey> xKey(
+                    xRootKey->openKey(key) );
+                if (xKey.is() && xKey->isValid())
+                {
+                    const OUString location( xKey->getAsciiValue() );
+                    if (location.equalsIgnoreAsciiCase( getURL() ))
+                    {
+                        break;
+                    }
+                    else
+                    {
+                        //try to match only the file name
+                        OUString thisUrl(getURL());
+                        std::u16string_view thisFileName(thisUrl.subView(thisUrl.lastIndexOf('/')));
+
+                        std::u16string_view locationFileName(location.subView(location.lastIndexOf('/')));
+                        if (o3tl::equalsIgnoreAsciiCase(locationFileName, thisFileName))
+                            bAmbiguousComponentName = true;
+                    }
+                }
+            }
+            if (pos >= 0)
+                m_registered = Reg::Registered;
+            else if (bAmbiguousComponentName)
+                m_registered = Reg::MaybeRegistered;
+        }
+    }
+
+    //Different extensions can use the same service implementations. Then the extensions
+    //which was installed last will overwrite the one from the other extension. That is
+    //the registry will contain the path (the location) of the library or jar of the
+    //second extension. In this case isRegistered called for the lib of the first extension
+    //would return "not registered". That would mean that during uninstallation
+    //XPackage::registerPackage is not called, because it just was not registered. This is,
+    //however, necessary for jar files. Registering and unregistering update
+    //uno_packages/cache/registry/com.sun.star.comp.deployment.component.PackageRegistryBackend/unorc
+    //Therefore, we will return always "is ambiguous" if the path of this component cannot
+    //be found in the registry and if there is another path and both have the same file name (but
+    //the rest of the path is different).
+    //If the caller cannot precisely determine that this package was registered, then it must
+    //call registerPackage.
+    bool bAmbiguous = m_registered == Reg::Void // Reg::Void == we are in the progress of unregistration
+        || m_registered == Reg::MaybeRegistered;
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true /* IsPresent */,
+        beans::Ambiguous<sal_Bool>(
+            m_registered == Reg::Registered, bAmbiguous) );
+}
+
+
+void BackendImpl::ComponentPackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool startup,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    BackendImpl * that = getMyBackend();
+    OUString url(getURL());
+    if (doRegisterPackage) {
+        ComponentBackendDb::Data data;
+        css::uno::Reference< css::uno::XComponentContext > context;
+        if (startup) {
+            context = that->getComponentContext();
+        } else {
+            context.set(that->getObject(url), css::uno::UNO_QUERY);
+            if (!context.is()) {
+                context.set(
+                    that->insertObject(
+                        url,
+                        raise_uno_process(
+                            that->getComponentContext(), abortChannel)),
+                    css::uno::UNO_QUERY_THROW);
+            }
+        }
+        css::uno::Reference< css::registry::XImplementationRegistration> impreg(
+            context->getServiceManager()->createInstanceWithContext(
+                "com.sun.star.registry.ImplementationRegistration",
+                context),
+            css::uno::UNO_QUERY_THROW);
+        css::uno::Reference< css::registry::XSimpleRegistry > rdb(getRDB());
+        impreg->registerImplementation(m_loader, url, rdb);
+        // Only write to unorc after successful registration; it may fail if
+        // there is no suitable java
+        if (m_loader == "com.sun.star.loader.Java2" && !jarManifestHeaderPresent(url, "UNO-Type-Path", xCmdEnv))
+        {
+            that->addToUnoRc(RCITEM_JAR_TYPELIB, url, xCmdEnv);
+            data.javaTypeLibrary = true;
+        }
+        std::vector< css::uno::Reference< css::uno::XInterface > > factories;
+        getComponentInfo(&data, startup ? nullptr : &factories, context);
+        if (!startup) {
+            try {
+                componentLiveInsertion(data, factories);
+            } catch (css::uno::Exception &) {
+                TOOLS_INFO_EXCEPTION("desktop.deployment", "caught");
+                try {
+                    impreg->revokeImplementation(url, rdb);
+                } catch (css::uno::RuntimeException &) {
+                    TOOLS_WARN_EXCEPTION("desktop.deployment", "ignored");
+                }
+                throw;
+            }
+        }
+        m_registered = Reg::Registered;
+        that->addDataToDb(url, data);
+    } else { // revoke
+        m_registered = Reg::Void;
+        ComponentBackendDb::Data data(that->readDataFromDb(url));
+        css::uno::Reference< css::uno::XComponentContext > context(
+            that->getObject(url), css::uno::UNO_QUERY);
+        bool remoteContext = context.is();
+        if (!remoteContext) {
+            context = that->getComponentContext();
+        }
+        if (!startup) {
+            componentLiveRemoval(data);
+        }
+        css::uno::Reference< css::registry::XImplementationRegistration >(
+            context->getServiceManager()->createInstanceWithContext(
+                "com.sun.star.registry.ImplementationRegistration",
+                context),
+            css::uno::UNO_QUERY_THROW)->revokeImplementation(url, getRDB());
+        if (data.javaTypeLibrary) {
+            that->removeFromUnoRc(RCITEM_JAR_TYPELIB, url, xCmdEnv);
+        }
+        if (remoteContext) {
+            that->releaseObject(url);
+        }
+        m_registered = Reg::NotRegistered;
+        getMyBackend()->revokeEntryFromDb(url);
+    }
+}
+
+BackendImpl::TypelibraryPackageImpl::TypelibraryPackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url, OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    bool jarFile, bool bRemoved, OUString const & identifier)
+    : Package( myBackend, url, name, name /* display-name */,
+               xPackageType, bRemoved, identifier),
+      m_jarFile( jarFile )
+{
+}
+
+// Package
+BackendImpl * BackendImpl::TypelibraryPackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException( "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<TypelibraryPackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::TypelibraryPackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    BackendImpl * that = getMyBackend();
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true /* IsPresent */,
+        beans::Ambiguous<sal_Bool>(
+            that->hasInUnoRc(
+                m_jarFile ? RCITEM_JAR_TYPELIB : RCITEM_RDB_TYPELIB, getURL() ),
+            false /* IsAmbiguous */ ) );
+}
+
+
+void BackendImpl::TypelibraryPackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool /*startup*/,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    BackendImpl * that = getMyBackend();
+    const OUString url( getURL() );
+
+    if (doRegisterPackage)
+    {
+        // live insertion:
+        if (m_jarFile) {
+            // xxx todo add to classpath at runtime: ???
+            //SB: It is probably not worth it to add the live inserted type
+            // library JAR to the UnoClassLoader in the soffice process.  Any
+            // live inserted component JAR that might reference this type
+            // library JAR runs in its own uno process, so there is probably no
+            // Java code in the soffice process that would see any UNO types
+            // introduced by this type library JAR.
+        }
+        else // RDB:
+        {
+            css::uno::Reference< css::container::XSet >(
+                that->getComponentContext()->getValueByName(
+                    "/singletons"
+                    "/com.sun.star.reflection.theTypeDescriptionManager"),
+                css::uno::UNO_QUERY_THROW)->insert(
+                    css::uno::Any(expandUnoRcUrl(url)));
+        }
+
+        that->addToUnoRc( m_jarFile ? RCITEM_JAR_TYPELIB : RCITEM_RDB_TYPELIB,
+                          url, xCmdEnv );
+    }
+    else // revokePackage()
+    {
+        that->removeFromUnoRc(
+            m_jarFile ? RCITEM_JAR_TYPELIB : RCITEM_RDB_TYPELIB, url, xCmdEnv );
+
+        // revoking types at runtime, possible, sensible?
+        if (!m_jarFile) {
+            css::uno::Reference< css::container::XSet >(
+                that->getComponentContext()->getValueByName(
+                    "/singletons"
+                    "/com.sun.star.reflection.theTypeDescriptionManager"),
+                css::uno::UNO_QUERY_THROW)->remove(
+                    css::uno::Any(expandUnoRcUrl(url)));
+        }
+    }
+}
+
+BackendImpl::OtherPlatformPackageImpl::OtherPlatformPackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url, OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    bool bRemoved, OUString const & identifier, OUString platform)
+    : Package(myBackend, url, name, name, xPackageType, bRemoved, identifier)
+    , m_aPlatform(std::move(platform))
+{
+    OSL_PRECOND(bRemoved, "this class can only be used for removing packages!");
+}
+
+BackendImpl *
+BackendImpl::OtherPlatformPackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //Throws a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException("Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<OtherPlatformPackageImpl*>(this)));
+    }
+    return pBackend;
+}
+
+Reference<registry::XSimpleRegistry>
+BackendImpl::OtherPlatformPackageImpl::impl_openRDB() const
+{
+    OUString const aRDB(m_aPlatform + ".rdb");
+    OUString const aRDBPath(makeURL(getMyBackend()->getCachePath(), aRDB));
+
+    Reference<registry::XSimpleRegistry> xRegistry;
+
+    try
+    {
+        xRegistry.set(
+                impl_createInstance("com.sun.star.registry.SimpleRegistry"),
+                UNO_QUERY)
+            ;
+        if (xRegistry.is())
+            xRegistry->open(expandUnoRcUrl(aRDBPath), false, false);
+    }
+    catch (registry::InvalidRegistryException const&)
+    {
+        // If the registry does not exist, we do not need to bother at all
+        xRegistry.set(nullptr);
+    }
+
+    SAL_WARN_IF( !xRegistry.is(), "desktop.deployment", "could not create registry for the package's platform");
+    return xRegistry;
+}
+
+Reference<XInterface>
+BackendImpl::OtherPlatformPackageImpl::impl_createInstance(OUString const& rService)
+const
+{
+    Reference<XComponentContext> const xContext(getMyBackend()->getComponentContext());
+    OSL_ASSERT(xContext.is());
+    Reference<XInterface> xService;
+    if (xContext.is())
+        xService.set(xContext->getServiceManager()->createInstanceWithContext(rService, xContext));
+    return xService;
+}
+
+beans::Optional<beans::Ambiguous<sal_Bool> >
+BackendImpl::OtherPlatformPackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard& /* guard */,
+    ::rtl::Reference<AbortChannel> const& /* abortChannel */,
+    Reference<XCommandEnvironment> const& /* xCmdEnv */ )
+{
+    return beans::Optional<beans::Ambiguous<sal_Bool> >(true,
+            beans::Ambiguous<sal_Bool>(true, false));
+}
+
+void
+BackendImpl::OtherPlatformPackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard& /* guard */,
+    bool bRegisterPackage,
+    bool /* bStartup */,
+    ::rtl::Reference<AbortChannel> const& /* abortChannel */,
+    Reference<XCommandEnvironment> const& /* xCmdEnv */)
+{
+    OSL_PRECOND(!bRegisterPackage, "this class can only be used for removing packages!");
+
+    OUString const aURL(getURL());
+
+    Reference<registry::XSimpleRegistry> const xServicesRDB(impl_openRDB());
+    Reference<registry::XImplementationRegistration> const xImplReg(
+            impl_createInstance("com.sun.star.registry.ImplementationRegistration"),
+            UNO_QUERY)
+        ;
+    if (xImplReg.is() && xServicesRDB.is())
+        xImplReg->revokeImplementation(aURL, xServicesRDB);
+    if (xServicesRDB.is())
+        xServicesRDB->close();
+
+    getMyBackend()->revokeEntryFromDb(aURL);
+}
+
+BackendImpl * BackendImpl::ComponentsPackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //Throws a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException("Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<ComponentsPackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::ComponentsPackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true,
+        beans::Ambiguous<sal_Bool>(
+            getMyBackend()->hasInUnoRc(RCITEM_COMPONENTS, getURL()), false));
+}
+
+void BackendImpl::ComponentsPackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool startup,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    BackendImpl * that = getMyBackend();
+    OUString url(getURL());
+    if (doRegisterPackage) {
+        if (!startup) {
+            css::uno::Reference< css::uno::XComponentContext > context(
+                that->getObject(url), css::uno::UNO_QUERY);
+            if (!context.is()) {
+                context.set(
+                    that->insertObject(
+                        url,
+                        raise_uno_process(
+                            that->getComponentContext(), abortChannel)),
+                    css::uno::UNO_QUERY_THROW);
+            }
+            // This relies on the root component context's service manager
+            // supporting the extended XSet semantics:
+            css::uno::Sequence< css::beans::NamedValue > args
+            {
+                { "uri", css::uno::Any(expandUnoRcUrl(url)) },
+                { "component-context", css::uno::Any(context) }
+            };
+            css::uno::Reference< css::container::XSet > smgr(
+                that->getRootContext()->getServiceManager(),
+                css::uno::UNO_QUERY_THROW);
+            smgr->insert(css::uno::Any(args));
+        }
+        that->addToUnoRc(RCITEM_COMPONENTS, url, xCmdEnv);
+    } else { // revoke
+        that->removeFromUnoRc(RCITEM_COMPONENTS, url, xCmdEnv);
+        if (!startup) {
+            // This relies on the root component context's service manager
+            // supporting the extended XSet semantics:
+            css::uno::Sequence< css::beans::NamedValue > args { { "uri", css::uno::Any(expandUnoRcUrl(url)) } };
+            css::uno::Reference< css::container::XSet > smgr(
+                that->getRootContext()->getServiceManager(),
+                css::uno::UNO_QUERY_THROW);
+            smgr->remove(css::uno::Any(args));
+        }
+        that->releaseObject(url);
+        that->revokeEntryFromDb(url); // in case it got added with old code
+    }
+}
+
+BackendImpl::ComponentsPackageImpl::ComponentsPackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url, OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    bool bRemoved, OUString const & identifier)
+    : Package( myBackend, url, name, name /* display-name */,
+               xPackageType, bRemoved, identifier)
+{}
+
+} // anon namespace
+
+} // namespace dp_registry
+
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_component_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::component::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/configuration/dp_configuration.cxx b/desktop/source/deployment/registry/configuration/dp_configuration.cxx
new file mode 100644
index 000000000..62d5ab88f
--- /dev/null
+++ b/desktop/source/deployment/registry/configuration/dp_configuration.cxx
@@ -0,0 +1,818 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+//TODO: Large parts of this file were copied from dp_component.cxx; those parts
+// should be consolidated.
+
+#include <config_extensions.h>
+
+#include <dp_backend.h>
+#if HAVE_FEATURE_EXTENSIONS
+#include <dp_persmap.h>
+#endif
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <rtl/string.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <ucbhelper/content.hxx>
+#include <unotools/ucbhelper.hxx>
+#include <xmlscript/xml_helper.hxx>
+#include <comphelper/lok.hxx>
+#include <svl/inettype.hxx>
+#include <o3tl/string_view.hxx>
+#include <com/sun/star/configuration/Update.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <deque>
+#include <memory>
+#include <string_view>
+#include <utility>
+
+#include "dp_configurationbackenddb.hxx"
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend::configuration {
+namespace {
+
+class BackendImpl : public ::dp_registry::backend::PackageRegistryBackend
+{
+    class PackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const ;
+
+        const bool m_isSchema;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    public:
+        PackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool isSchema, bool bRemoved, OUString const & identifier)
+            : Package( myBackend, url, name, name /* display-name */,
+                       xPackageType, bRemoved, identifier),
+              m_isSchema( isSchema )
+            {}
+    };
+    friend class PackageImpl;
+
+    std::deque<OUString> m_xcs_files;
+    std::deque<OUString> m_xcu_files;
+    std::deque<OUString> & getFiles( bool xcs ) {
+        return xcs ? m_xcs_files : m_xcu_files;
+    }
+
+    bool m_configmgrini_inited;
+    bool m_configmgrini_modified;
+    std::unique_ptr<ConfigurationBackendDb> m_backendDb;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType, bool bRemoved,
+        OUString const & identifier,
+        Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+#if HAVE_FEATURE_EXTENSIONS
+    // for backwards compatibility - nil if no (compatible) back-compat db present
+    std::unique_ptr<PersistentMap> m_registeredPackages;
+#endif
+
+    virtual void SAL_CALL disposing() override;
+
+    const Reference<deployment::XPackageTypeInfo> m_xConfDataTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xConfSchemaTypeInfo;
+    Sequence< Reference<deployment::XPackageTypeInfo> > m_typeInfos;
+
+    void configmgrini_verify_init(
+        Reference<XCommandEnvironment> const & xCmdEnv );
+    void configmgrini_flush( Reference<XCommandEnvironment> const & xCmdEnv );
+
+    /* The parameter isURL is false in the case of adding the conf:ini-entry
+       value from the backend db. This entry already contains the path as it
+       is used in the configmgr.ini.
+     */
+    void addToConfigmgrIni( bool isSchema, bool isURL, OUString const & url,
+                     Reference<XCommandEnvironment> const & xCmdEnv );
+#if HAVE_FEATURE_EXTENSIONS
+    bool removeFromConfigmgrIni( bool isSchema, OUString const & url,
+                          Reference<XCommandEnvironment> const & xCmdEnv );
+#endif
+    void addDataToDb(OUString const & url, ConfigurationBackendDb::Data const & data);
+    ::std::optional<ConfigurationBackendDb::Data> readDataFromDb(std::u16string_view url);
+    void revokeEntryFromDb(std::u16string_view url);
+    bool hasActiveEntry(std::u16string_view url);
+    bool activateEntry(std::u16string_view url);
+
+public:
+    BackendImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+    using PackageRegistryBackend::disposing;
+};
+
+
+void BackendImpl::disposing()
+{
+    try {
+        configmgrini_flush( Reference<XCommandEnvironment>() );
+
+        PackageRegistryBackend::disposing();
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        throw lang::WrappedTargetRuntimeException(
+            "caught unexpected exception while disposing...",
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : PackageRegistryBackend( args, xComponentContext ),
+      m_configmgrini_inited( false ),
+      m_configmgrini_modified( false ),
+      m_xConfDataTypeInfo( new Package::TypeInfo(
+                               "application/vnd.sun.star.configuration-data",
+                               "*.xcu",
+                               DpResId(RID_STR_CONF_DATA)
+                               ) ),
+      m_xConfSchemaTypeInfo( new Package::TypeInfo(
+                                 "application/vnd.sun.star.configuration-schema",
+                                 "*.xcs",
+                                 DpResId(RID_STR_CONF_SCHEMA)
+                                 ) ),
+      m_typeInfos{ m_xConfDataTypeInfo, m_xConfSchemaTypeInfo }
+{
+    const Reference<XCommandEnvironment> xCmdEnv;
+
+    if (transientMode())
+    {
+        // TODO
+    }
+    else
+    {
+        OUString dbFile = makeURL(getCachePath(), "backenddb.xml");
+        m_backendDb.reset(
+            new ConfigurationBackendDb(getComponentContext(), dbFile));
+        //clean up data folders which are no longer used.
+        //This must not be done in the same process where the help files
+        //are still registers. Only after revoking and restarting OOo the folders
+        //can be removed. This works now, because the extension manager is a singleton
+        //and the backends are only create once per process.
+        std::vector<OUString> folders = m_backendDb->getAllDataUrls();
+        deleteUnusedFolders(folders);
+
+        configmgrini_verify_init( xCmdEnv );
+
+#if HAVE_FEATURE_EXTENSIONS
+        std::unique_ptr<PersistentMap> pMap;
+        OUString aCompatURL( makeURL( getCachePath(), "registered_packages.pmap" ) );
+
+        // Don't create it if it doesn't exist already
+        if ( ::utl::UCBContentHelper::Exists( expandUnoRcUrl( aCompatURL ) ) )
+        {
+            try
+            {
+                pMap.reset( new PersistentMap( aCompatURL ) );
+            }
+            catch (const Exception &e)
+            {
+                OUString aStr = "Exception loading legacy package database: '" +
+                    e.Message +
+                    "' - ignoring file, please remove it.\n";
+                dp_misc::writeConsole( aStr );
+            }
+        }
+        m_registeredPackages = std::move(pMap);
+#endif
+     }
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.configuration.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+void BackendImpl::addDataToDb(
+    OUString const & url, ConfigurationBackendDb::Data const & data)
+{
+    if (m_backendDb)
+        m_backendDb->addEntry(url, data);
+}
+
+::std::optional<ConfigurationBackendDb::Data> BackendImpl::readDataFromDb(
+    std::u16string_view url)
+{
+    ::std::optional<ConfigurationBackendDb::Data> data;
+    if (m_backendDb)
+        data = m_backendDb->getEntry(url);
+    return data;
+}
+
+void BackendImpl::revokeEntryFromDb(std::u16string_view url)
+{
+    if (m_backendDb)
+        m_backendDb->revokeEntry(url);
+}
+
+bool BackendImpl::hasActiveEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->hasActiveEntry(url);
+    return false;
+}
+
+bool BackendImpl::activateEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->activateEntry(url);
+    return false;
+}
+
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return m_typeInfos;
+}
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_,
+    bool bRemoved, OUString const & identifier,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    OUString mediaType( mediaType_ );
+    if (mediaType.isEmpty())
+    {
+        // detect media-type:
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, url, xCmdEnv ))
+        {
+            const OUString title( StrTitle::getTitle( ucbContent ) );
+            if (title.endsWithIgnoreAsciiCase( ".xcu" )) {
+                mediaType = "application/vnd.sun.star.configuration-data";
+            }
+            if (title.endsWithIgnoreAsciiCase( ".xcs" )) {
+                mediaType = "application/vnd.sun.star.configuration-schema";
+            }
+        }
+        if (mediaType.isEmpty())
+            throw lang::IllegalArgumentException(
+                StrCannotDetectMediaType() + url,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            OUString name;
+            if (!bRemoved)
+            {
+                ::ucbhelper::Content ucbContent( url, xCmdEnv, m_xComponentContext );
+                name = StrTitle::getTitle( ucbContent );
+            }
+
+            if (subType.equalsIgnoreAsciiCase( "vnd.sun.star.configuration-data"))
+            {
+                return new PackageImpl(
+                    this, url, name, m_xConfDataTypeInfo, false /* data file */,
+                    bRemoved, identifier);
+            }
+            else if (subType.equalsIgnoreAsciiCase( "vnd.sun.star.configuration-schema")) {
+                return new PackageImpl(
+                    this, url, name, m_xConfSchemaTypeInfo, true /* schema file */,
+                    bRemoved, identifier);
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+
+void BackendImpl::configmgrini_verify_init(
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (transientMode())
+        return;
+    const ::osl::MutexGuard guard( m_aMutex );
+    if ( m_configmgrini_inited)
+        return;
+
+    // common rc:
+    ::ucbhelper::Content ucb_content;
+    if (create_ucb_content(
+            &ucb_content,
+            makeURL( getCachePath(), "configmgr.ini" ),
+            xCmdEnv, false /* no throw */ ))
+    {
+        OUString line;
+        if (readLine( &line, "SCHEMA=", ucb_content,
+                      RTL_TEXTENCODING_UTF8 ))
+        {
+            sal_Int32 index = RTL_CONSTASCII_LENGTH("SCHEMA=");
+            do {
+                OUString token( o3tl::trim(o3tl::getToken(line, 0, ' ', index )) );
+                if (!token.isEmpty()) {
+                    //The  file may not exist anymore if a shared or bundled
+                    //extension was removed, but it can still be in the configmgrini.
+                    //After running XExtensionManager::synchronize, the configmgrini is
+                    //cleaned up
+                    m_xcs_files.push_back( token );
+                }
+            }
+            while (index >= 0);
+        }
+        if (readLine( &line, "DATA=", ucb_content,
+                      RTL_TEXTENCODING_UTF8 )) {
+            sal_Int32 index = RTL_CONSTASCII_LENGTH("DATA=");
+            do {
+                std::u16string_view token( o3tl::trim(o3tl::getToken(line, 0, ' ', index )) );
+                if (!token.empty())
+                {
+                    if (token[ 0 ] == '?')
+                        token = token.substr( 1 );
+                    //The  file may not exist anymore if a shared or bundled
+                    //extension was removed, but it can still be in the configmgrini.
+                    //After running XExtensionManager::synchronize, the configmgrini is
+                    //cleaned up
+                    m_xcu_files.push_back( OUString(token) );
+                }
+            }
+            while (index >= 0);
+        }
+    }
+    m_configmgrini_modified = false;
+    m_configmgrini_inited = true;
+}
+
+
+void BackendImpl::configmgrini_flush(
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (transientMode())
+        return;
+    if (!m_configmgrini_inited || !m_configmgrini_modified)
+        return;
+
+    OStringBuffer buf;
+    if (! m_xcs_files.empty())
+    {
+        auto iPos( m_xcs_files.cbegin() );
+        auto const iEnd( m_xcs_files.cend() );
+        buf.append( "SCHEMA=" );
+        while (iPos != iEnd) {
+            // encoded ASCII file-urls:
+            const OString item(
+                OUStringToOString( *iPos, RTL_TEXTENCODING_ASCII_US ) );
+            buf.append( item );
+            ++iPos;
+            if (iPos != iEnd)
+                buf.append( ' ' );
+        }
+        buf.append(LF);
+    }
+    if (! m_xcu_files.empty())
+    {
+        auto iPos( m_xcu_files.cbegin() );
+        auto const iEnd( m_xcu_files.cend() );
+        buf.append( "DATA=" );
+        while (iPos != iEnd) {
+            // encoded ASCII file-urls:
+            const OString item(
+                OUStringToOString( *iPos, RTL_TEXTENCODING_ASCII_US ) );
+            buf.append( item );
+            ++iPos;
+            if (iPos != iEnd)
+                buf.append( ' ' );
+        }
+        buf.append(LF);
+    }
+
+    // write configmgr.ini:
+    const Reference<io::XInputStream> xData(
+        ::xmlscript::createInputStream(
+                reinterpret_cast<sal_Int8 const *>(buf.getStr()),
+                buf.getLength() ) );
+    ::ucbhelper::Content ucb_content(
+        makeURL( getCachePath(), "configmgr.ini" ), xCmdEnv, m_xComponentContext );
+    ucb_content.writeStream( xData, true /* replace existing */ );
+
+    m_configmgrini_modified = false;
+}
+
+
+void BackendImpl::addToConfigmgrIni( bool isSchema, bool isURL, OUString const & url_,
+                              Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    const OUString rcterm( isURL ? dp_misc::makeRcTerm(url_) : url_ );
+    const ::osl::MutexGuard guard( m_aMutex );
+    configmgrini_verify_init( xCmdEnv );
+    std::deque<OUString> & rSet = getFiles(isSchema);
+    if (std::find( rSet.begin(), rSet.end(), rcterm ) == rSet.end()) {
+        rSet.push_front( rcterm ); // prepend to list, thus overriding
+        // write immediately:
+        m_configmgrini_modified = true;
+        configmgrini_flush( xCmdEnv );
+    }
+}
+
+#if HAVE_FEATURE_EXTENSIONS
+bool BackendImpl::removeFromConfigmgrIni(
+    bool isSchema, OUString const & url_,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    const OUString rcterm( dp_misc::makeRcTerm(url_) );
+    const ::osl::MutexGuard guard( m_aMutex );
+    configmgrini_verify_init( xCmdEnv );
+    std::deque<OUString> & rSet = getFiles(isSchema);
+    auto i(std::find(rSet.begin(), rSet.end(), rcterm));
+    if (i == rSet.end() && !isSchema)
+    {
+        //in case the xcu contained %origin% then the configmr.ini contains the
+        //url to the file in the user installation (e.g. $BUNDLED_EXTENSIONS_USER)
+        //However, m_url (getURL()) contains the URL for the file in the actual
+        //extension installation.
+        ::std::optional<ConfigurationBackendDb::Data> data = readDataFromDb(url_);
+        if (data)
+            i = std::find(rSet.begin(), rSet.end(), data->iniEntry);
+    }
+    if (i == rSet.end()) {
+        return false;
+    }
+    rSet.erase(i);
+    // write immediately:
+    m_configmgrini_modified = true;
+    configmgrini_flush( xCmdEnv );
+    return true;
+}
+#endif
+
+// Package
+
+
+BackendImpl * BackendImpl::PackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException(
+            "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<PackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::PackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    BackendImpl * that = getMyBackend();
+
+    bool bReg = false;
+    if (that->hasActiveEntry(getURL()))
+        bReg = true;
+
+#if HAVE_FEATURE_EXTENSIONS
+    const OUString url(getURL());
+    if (!bReg && that->m_registeredPackages)
+    {
+        // fallback for user extension registered in berkeley DB
+        bReg = that->m_registeredPackages->has(
+            OUStringToOString( url, RTL_TEXTENCODING_UTF8 ));
+    }
+#endif
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true, beans::Ambiguous<sal_Bool>( bReg, false ) );
+}
+
+
+OUString encodeForXml( OUString const & text )
+{
+    // encode conforming xml:
+    sal_Int32 len = text.getLength();
+    OUStringBuffer buf;
+    for ( sal_Int32 pos = 0; pos < len; ++pos )
+    {
+        sal_Unicode c = text[ pos ];
+        switch (c) {
+        case '<':
+            buf.append( "&lt;" );
+            break;
+        case '>':
+            buf.append( "&gt;" );
+            break;
+        case '&':
+            buf.append( "&amp;" );
+            break;
+        case '\'':
+            buf.append( "&apos;" );
+            break;
+        case '\"':
+            buf.append( "&quot;" );
+            break;
+        default:
+            buf.append( c );
+            break;
+        }
+    }
+    return buf.makeStringAndClear();
+}
+
+
+OUString replaceOrigin(
+    OUString const & url, std::u16string_view destFolder, Reference< XCommandEnvironment > const & xCmdEnv, Reference< XComponentContext > const & xContext, bool & out_replaced)
+{
+    // looking for %origin%:
+    ::ucbhelper::Content ucb_content( url, xCmdEnv, xContext );
+    std::vector<sal_Int8> bytes( readFile( ucb_content ) );
+    std::vector<sal_Int8> filtered( bytes.size() * 2 );
+    bool use_filtered = false;
+    OString origin;
+    char const * pBytes = reinterpret_cast<char const *>(
+        bytes.data());
+    std::size_t nBytes = bytes.size();
+    size_t write_pos = 0;
+    while (nBytes > 0)
+    {
+        sal_Int32 index = rtl_str_indexOfChar_WithLength( pBytes, nBytes, '%' );
+        if (index < 0) {
+            if (! use_filtered) // opt
+                break;
+            index = nBytes;
+        }
+
+        if ((write_pos + index) > filtered.size())
+            filtered.resize( (filtered.size() + index) * 2 );
+        memcpy( filtered.data() + write_pos, pBytes, index );
+        write_pos += index;
+        pBytes += index;
+        nBytes -= index;
+        if (nBytes == 0)
+            break;
+
+        // consume %:
+        ++pBytes;
+        --nBytes;
+        char const * pAdd = "%";
+        sal_Int32 nAdd = 1;
+        if (nBytes > 1 && pBytes[ 0 ] == '%')
+        {
+            // %% => %
+            ++pBytes;
+            --nBytes;
+            use_filtered = true;
+        }
+        else if (rtl_str_shortenedCompare_WithLength(
+                     pBytes, nBytes,
+                     "origin%",
+                     RTL_CONSTASCII_LENGTH("origin%"),
+                     RTL_CONSTASCII_LENGTH("origin%")) == 0)
+        {
+            if (origin.isEmpty()) {
+                // encode only once
+                origin = OUStringToOString(
+                    encodeForXml( url.copy( 0, url.lastIndexOf( '/' ) ) ),
+                    // xxx todo: encode always for UTF-8? => lookup doc-header?
+                    RTL_TEXTENCODING_UTF8 );
+            }
+            pAdd = origin.getStr();
+            nAdd = origin.getLength();
+            pBytes += RTL_CONSTASCII_LENGTH("origin%");
+            nBytes -= RTL_CONSTASCII_LENGTH("origin%");
+            use_filtered = true;
+        }
+        if ((write_pos + nAdd) > filtered.size())
+            filtered.resize( (filtered.size() + nAdd) * 2 );
+        memcpy( filtered.data() + write_pos, pAdd, nAdd );
+        write_pos += nAdd;
+    }
+    if (!use_filtered)
+        return url;
+    if (write_pos < filtered.size())
+        filtered.resize( write_pos );
+    OUString newUrl(url);
+    if (!destFolder.empty())
+    {
+        //get the file name of the xcu and add it to the url of the temporary folder
+        sal_Int32 i = url.lastIndexOf('/');
+        newUrl = OUString::Concat(destFolder) + url.subView(i);
+    }
+
+    ucbhelper::Content(newUrl, xCmdEnv, xContext).writeStream(
+        xmlscript::createInputStream(std::move(filtered)), true);
+    out_replaced = true;
+    return newUrl;
+}
+
+
+void BackendImpl::PackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool startup,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    BackendImpl * that = getMyBackend();
+    OUString url( getURL() );
+
+    if (doRegisterPackage)
+    {
+        if (getMyBackend()->activateEntry(getURL()))
+        {
+            ::std::optional<ConfigurationBackendDb::Data> data = that->readDataFromDb(url);
+            OSL_ASSERT(data);
+            that->addToConfigmgrIni( m_isSchema, false, data->iniEntry, xCmdEnv );
+        }
+        else
+        {
+            ConfigurationBackendDb::Data data;
+            if (!m_isSchema)
+            {
+                const OUString sModFolder = that->createFolder(xCmdEnv);
+                bool out_replaced = false;
+                url = replaceOrigin(url, sModFolder, xCmdEnv, that->getComponentContext(), out_replaced);
+                if (out_replaced)
+                    data.dataUrl = sModFolder;
+                else
+                    deleteTempFolder(sModFolder);
+            }
+            //No need for live-deployment for bundled extension, because OOo
+            //restarts after installation
+            if ((that->m_eContext != Context::Bundled && !startup)
+                 || comphelper::LibreOfficeKit::isActive())
+            {
+                if (m_isSchema)
+                {
+                    css::configuration::Update::get(
+                        that->m_xComponentContext)->insertExtensionXcsFile(
+                            that->m_eContext == Context::Shared, expandUnoRcUrl(url));
+                }
+                else
+                {
+                    css::configuration::Update::get(
+                        that->m_xComponentContext)->insertExtensionXcuFile(
+                            that->m_eContext == Context::Shared, expandUnoRcUrl(url));
+                }
+            }
+            that->addToConfigmgrIni( m_isSchema, true, url, xCmdEnv );
+            data.iniEntry = dp_misc::makeRcTerm(url);
+            that->addDataToDb(getURL(), data);
+        }
+    }
+    else // revoke
+    {
+#if HAVE_FEATURE_EXTENSIONS
+        if (!that->removeFromConfigmgrIni(m_isSchema, url, xCmdEnv) &&
+            that->m_registeredPackages) {
+            // Obsolete package database handling - should be removed for LibreOffice 4.0
+            t_string2string_map entries(
+                that->m_registeredPackages->getEntries());
+            for (auto const& entry : entries)
+            {
+                //If the xcu file was installed before the configmgr was changed
+                //to use the configmgr.ini, one needed to rebuild to whole directory
+                //structure containing the xcu, xcs files from all extensions. Now,
+                //we just add all other xcu/xcs files to the configmgr.ini instead of
+                //rebuilding the directory structure.
+                OUString url2(
+                    OStringToOUString(entry.first, RTL_TEXTENCODING_UTF8));
+                if (url2 != url) {
+                   bool schema = entry.second.equalsIgnoreAsciiCase(
+                       "vnd.sun.star.configuration-schema");
+                   OUString url_replaced(url2);
+                   ConfigurationBackendDb::Data data;
+                   if (!schema)
+                   {
+                       const OUString sModFolder = that->createFolder(xCmdEnv);
+                       bool out_replaced = false;
+                       url_replaced = replaceOrigin(
+                           url2, sModFolder, xCmdEnv, that->getComponentContext(), out_replaced);
+                       if (out_replaced)
+                           data.dataUrl = sModFolder;
+                       else
+                           deleteTempFolder(sModFolder);
+                   }
+                   that->addToConfigmgrIni(schema, true, url_replaced, xCmdEnv);
+                   data.iniEntry = dp_misc::makeRcTerm(url_replaced);
+                   that->addDataToDb(url2, data);
+                }
+                that->m_registeredPackages->erase(entry.first);
+            }
+            try
+            {
+                ::ucbhelper::Content(
+                    makeURL( that->getCachePath(), "registry" ),
+                    xCmdEnv, that->getComponentContext() ).executeCommand(
+                        "delete", Any( true /* delete physically */ ) );
+            }
+            catch(const Exception&)
+            {
+                OSL_ASSERT(false);
+            }
+        }
+#endif
+        ::std::optional<ConfigurationBackendDb::Data> data = that->readDataFromDb(url);
+        //If an xcu file was life deployed then always a data entry is written.
+        //If the xcu file was already in the configmr.ini then there is also
+        //a data entry
+        if (!m_isSchema && data)
+        {
+            css::configuration::Update::get(
+                that->m_xComponentContext)->removeExtensionXcuFile(expandUnoRcTerm(data->iniEntry));
+        }
+        that->revokeEntryFromDb(url);
+    }
+}
+
+} // anon namespace
+
+} // namespace dp_registry
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_configuration_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::configuration::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.cxx b/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.cxx
new file mode 100644
index 000000000..afdc8112f
--- /dev/null
+++ b/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.cxx
@@ -0,0 +1,161 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/xml/xpath/XXPathAPI.hpp>
+
+#include "dp_configurationbackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/configuration-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"conf";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"configuration-backend-db";
+constexpr OUStringLiteral KEY_ELEMENT_NAME = u"configuration";
+
+namespace dp_registry::backend::configuration {
+
+ConfigurationBackendDb::ConfigurationBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):BackendDb(xContext, url)
+{
+
+}
+
+OUString ConfigurationBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString ConfigurationBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString ConfigurationBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString ConfigurationBackendDb::getKeyElementName()
+{
+    return KEY_ELEMENT_NAME;
+}
+
+
+void ConfigurationBackendDb::addEntry(OUString const & url, Data const & data)
+{
+    try{
+        if (!activateEntry(url))
+        {
+            Reference<css::xml::dom::XNode> helpNode
+                = writeKeyElement(url);
+
+            writeSimpleElement(u"data-url", data.dataUrl, helpNode);
+            writeSimpleElement(u"ini-entry", data.iniEntry, helpNode);
+            save();
+        }
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in configuration backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+
+::std::optional<ConfigurationBackendDb::Data>
+ConfigurationBackendDb::getEntry(std::u16string_view url)
+{
+    try
+    {
+        ConfigurationBackendDb::Data retData;
+        Reference<css::xml::dom::XNode> aNode = getKeyElement(url);
+        if (aNode.is())
+        {
+            retData.dataUrl = readSimpleElement(u"data-url", aNode);
+            retData.iniEntry = readSimpleElement(u"ini-entry", aNode);
+        }
+        else
+        {
+            return ::std::optional<Data>();
+        }
+        return ::std::optional<Data>(retData);
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in configuration backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+std::vector<OUString> ConfigurationBackendDb::getAllDataUrls()
+{
+    try
+    {
+        std::vector<OUString> listRet;
+        Reference<css::xml::dom::XDocument> doc = getDocument();
+        Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+
+        Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        const OUString sPrefix = getNSPrefix();
+        OUString sExpression(
+            sPrefix + ":configuration/" + sPrefix + ":data-url/text()");
+        Reference<css::xml::dom::XNodeList> nodes =
+            xpathApi->selectNodeList(root, sExpression);
+        if (nodes.is())
+        {
+            sal_Int32 length = nodes->getLength();
+            for (sal_Int32 i = 0; i < length; i++)
+                listRet.push_back(nodes->item(i)->getNodeValue());
+        }
+        return listRet;
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in configuration backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+} // namespace dp_registry::backend::configuration
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.hxx b/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.hxx
new file mode 100644
index 000000000..bd48aab7b
--- /dev/null
+++ b/desktop/source/deployment/registry/configuration/dp_configurationbackenddb.hxx
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <rtl/string.hxx>
+#include <vector>
+#include <optional>
+#include <string_view>
+
+#include <dp_backenddb.hxx>
+
+namespace com::sun::star::uno
+{
+class XComponentContext;
+}
+
+namespace dp_registry::backend::configuration
+{
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+ */
+class ConfigurationBackendDb : public dp_registry::backend::BackendDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+
+    virtual OUString getNSPrefix() override;
+
+    virtual OUString getRootElementName() override;
+
+    virtual OUString getKeyElementName() override;
+
+public:
+    struct Data
+    {
+        /* the URL to the folder containing the xcu or xcs files which contained
+           %origin%
+         */
+        OUString dataUrl;
+        /* the URL of the xcu or xcs file which is written in to the configmgr.ini
+         */
+        OUString iniEntry;
+    };
+
+public:
+    ConfigurationBackendDb(css::uno::Reference<css::uno::XComponentContext> const& xContext,
+                           OUString const& url);
+
+    void addEntry(OUString const& url, Data const& data);
+
+    ::std::optional<Data> getEntry(std::u16string_view url);
+    std::vector<OUString> getAllDataUrls();
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/dp_backend.cxx b/desktop/source/deployment/registry/dp_backend.cxx
new file mode 100644
index 000000000..2a681fe87
--- /dev/null
+++ b/desktop/source/deployment/registry/dp_backend.cxx
@@ -0,0 +1,771 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <dp_backend.h>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <rtl/ustring.hxx>
+#include <rtl/bootstrap.hxx>
+#include <sal/log.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <comphelper/unwrapargs.hxx>
+#include <ucbhelper/content.hxx>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionRemovedException.hpp>
+#include <com/sun/star/deployment/InvalidRemovedParameterException.hpp>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/InteractiveAugmentedIOException.hpp>
+#include <com/sun/star/ucb/IOErrorCode.hpp>
+#include <com/sun/star/beans/StringPair.hpp>
+#include <com/sun/star/sdbc/XResultSet.hpp>
+#include <com/sun/star/sdbc/XRow.hpp>
+#include <tools/diagnose_ex.h>
+#include <unotools/tempfile.hxx>
+#include <optional>
+#include <utility>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend {
+
+
+PackageRegistryBackend::~PackageRegistryBackend()
+{
+}
+
+
+void PackageRegistryBackend::disposing( lang::EventObject const & event )
+{
+    Reference<deployment::XPackage> xPackage(
+        event.Source, UNO_QUERY_THROW );
+    OUString url( xPackage->getURL() );
+    ::osl::MutexGuard guard( m_aMutex );
+    if ( m_bound.erase( url ) != 1 )
+    {
+        SAL_WARN("desktop.deployment", "erase(" << url << ") != 1");
+    }
+}
+
+
+PackageRegistryBackend::PackageRegistryBackend(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xContext )
+    : t_BackendBase( m_aMutex ),
+      m_xComponentContext( xContext ),
+      m_eContext( Context::Unknown )
+{
+    assert(xContext.is());
+    std::optional<OUString> cachePath;
+    std::optional<bool> readOnly;
+    comphelper::unwrapArgs( args, m_context, cachePath, readOnly );
+    if (cachePath)
+        m_cachePath = *cachePath;
+
+    if ( m_context == "user" )
+        m_eContext = Context::User;
+    else if ( m_context == "shared" )
+        m_eContext = Context::Shared;
+    else if ( m_context == "bundled" )
+        m_eContext = Context::Bundled;
+    else if ( m_context == "tmp" )
+        m_eContext = Context::Tmp;
+    else if (m_context.matchIgnoreAsciiCase("vnd.sun.star.tdoc:/"))
+        m_eContext = Context::Document;
+    else
+        m_eContext = Context::Unknown;
+}
+
+
+void PackageRegistryBackend::check()
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed) {
+        throw lang::DisposedException(
+            "PackageRegistryBackend instance has already been disposed!",
+            static_cast<OWeakObject *>(this) );
+    }
+}
+
+
+void PackageRegistryBackend::disposing()
+{
+    try {
+        for (auto const& elem : m_bound)
+            elem.second->removeEventListener(this);
+        m_bound.clear();
+        m_xComponentContext.clear();
+        WeakComponentImplHelperBase::disposing();
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        throw lang::WrappedTargetRuntimeException(
+            "caught unexpected exception while disposing!",
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+// XPackageRegistry
+
+Reference<deployment::XPackage> PackageRegistryBackend::bindPackage(
+    OUString const & url, OUString const & mediaType, sal_Bool  bRemoved,
+    OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    ::osl::ResettableMutexGuard guard( m_aMutex );
+    check();
+
+    t_string2ref::const_iterator const iFind( m_bound.find( url ) );
+    if (iFind != m_bound.end())
+    {
+        Reference<deployment::XPackage> xPackage( iFind->second );
+        if (xPackage.is())
+        {
+            if (!mediaType.isEmpty() &&
+                mediaType != xPackage->getPackageType()->getMediaType())
+                throw lang::IllegalArgumentException
+                    ("XPackageRegistry::bindPackage: media type does not match",
+                     static_cast<OWeakObject*>(this), 1);
+            if (xPackage->isRemoved() != bRemoved)
+                throw deployment::InvalidRemovedParameterException(
+                    "XPackageRegistry::bindPackage: bRemoved parameter does not match",
+                    static_cast<OWeakObject*>(this), xPackage->isRemoved(), xPackage);
+            return xPackage;
+        }
+    }
+
+    guard.clear();
+
+    Reference<deployment::XPackage> xNewPackage;
+    try {
+        xNewPackage = bindPackage_( url, mediaType, bRemoved,
+            identifier, xCmdEnv );
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException &) {
+        throw;
+    }
+    catch (const deployment::DeploymentException &) {
+        throw;
+    }
+    catch (const Exception &) {
+        Any exc( ::cppu::getCaughtException() );
+        throw deployment::DeploymentException(
+            "Error binding package: " + url,
+            static_cast<OWeakObject *>(this), exc );
+    }
+
+    guard.reset();
+
+    std::pair< t_string2ref::iterator, bool > insertion(
+        m_bound.emplace(  url, xNewPackage ) );
+    if (insertion.second)
+    { // first insertion
+        SAL_WARN_IF(
+            Reference<XInterface>(insertion.first->second) != xNewPackage,
+            "desktop.deployment", "mismatch");
+    }
+    else
+    { // found existing entry
+        Reference<deployment::XPackage> xPackage( insertion.first->second );
+        if (xPackage.is())
+            return xPackage;
+        insertion.first->second = xNewPackage;
+    }
+
+    guard.clear();
+    xNewPackage->addEventListener( this ); // listen for disposing events
+    return xNewPackage;
+}
+
+OUString PackageRegistryBackend::createFolder(
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    const OUString sDataFolder = makeURL(getCachePath(), OUString());
+    //make sure the folder exist
+    ucbhelper::Content dataContent;
+    ::dp_misc::create_folder(&dataContent, sDataFolder, xCmdEnv);
+
+    const OUString baseDir(sDataFolder);
+    ::utl::TempFile aTemp(&baseDir, true);
+    const OUString& url = aTemp.GetURL();
+    return sDataFolder + url.subView(url.lastIndexOf('/'));
+}
+
+//folderURL can have the extension .tmp or .tmp_
+//Before OOo 3.4 the created a tmp file with osl_createTempFile and
+//then created a Folder with a same name and a trailing '_'
+//If the folderURL has no '_' then there is no corresponding tmp file.
+void PackageRegistryBackend::deleteTempFolder(
+    OUString const & folderUrl)
+{
+    if (!folderUrl.isEmpty())
+    {
+        erase_path( folderUrl, Reference<XCommandEnvironment>(),
+                    false /* no throw: ignore errors */ );
+
+        if (folderUrl.endsWith("_"))
+        {
+            const OUString  tempFile = folderUrl.copy(0, folderUrl.getLength() - 1);
+            erase_path( tempFile, Reference<XCommandEnvironment>(),
+                        false /* no throw: ignore errors */ );
+        }
+    }
+}
+
+//usedFolders can contain folder names which have the extension .tmp or .tmp_
+//Before OOo 3.4 we created a tmp file with osl_createTempFile and
+//then created a Folder with a same name and a trailing '_'
+//If the folderURL has no '_' then there is no corresponding tmp file.
+void PackageRegistryBackend::deleteUnusedFolders(
+    std::vector< OUString> const & usedFolders)
+{
+    try
+    {
+        const OUString sDataFolder = makeURL(getCachePath(), OUString());
+        ::ucbhelper::Content tempFolder(
+            sDataFolder, Reference<ucb::XCommandEnvironment>(), m_xComponentContext);
+
+        Reference<sdbc::XResultSet> xResultSet(
+                 StrTitle::createCursor( tempFolder, ::ucbhelper::INCLUDE_FOLDERS_ONLY ) );
+
+        // get all temp directories:
+        std::vector<OUString> tempEntries;
+
+        while (xResultSet->next())
+        {
+            OUString title(
+                Reference<sdbc::XRow>(
+                    xResultSet, UNO_QUERY_THROW )->getString(
+                        1 /* Title */ ) );
+
+            if (title.endsWith(".tmp"))
+                tempEntries.push_back(
+                    makeURLAppendSysPathSegment(sDataFolder, title));
+        }
+
+        for (const OUString & tempEntrie : tempEntries)
+        {
+            if (std::find( usedFolders.begin(), usedFolders.end(), tempEntrie ) ==
+                usedFolders.end())
+            {
+                deleteTempFolder(tempEntrie);
+            }
+        }
+    }
+    catch (const ucb::InteractiveAugmentedIOException& e)
+    {
+        //In case the folder containing all the data folder does not
+        //exist yet, we ignore the exception
+        if (e.Code != ucb::IOErrorCode_NOT_EXISTING)
+            throw;
+    }
+
+}
+
+
+Package::~Package()
+{
+}
+
+
+Package::Package( ::rtl::Reference<PackageRegistryBackend>  myBackend,
+                  OUString url,
+                  OUString aName,
+                  OUString displayName,
+                  Reference<deployment::XPackageTypeInfo> const & xPackageType,
+                  bool bRemoved,
+                  OUString identifier)
+    : t_PackageBase( m_aMutex ),
+      m_myBackend(std::move( myBackend )),
+      m_url(std::move( url )),
+      m_name(std::move( aName )),
+      m_displayName(std::move( displayName )),
+      m_xPackageType( xPackageType ),
+      m_bRemoved(bRemoved),
+      m_identifier(std::move(identifier))
+{
+    if (m_bRemoved)
+    {
+        //We use the last segment of the URL
+        SAL_WARN_IF(
+            !m_name.isEmpty(), "desktop.deployment", "non-empty m_name");
+        OUString name = m_url;
+        rtl::Bootstrap::expandMacros(name);
+        sal_Int32 index = name.lastIndexOf('/');
+        if (index != -1 && index < name.getLength())
+            m_name = name.copy(index + 1);
+    }
+}
+
+
+void Package::disposing()
+{
+    m_myBackend.clear();
+    WeakComponentImplHelperBase::disposing();
+}
+
+
+void Package::check() const
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed) {
+        throw lang::DisposedException(
+            "Package instance has already been disposed!",
+            static_cast<OWeakObject *>(const_cast<Package *>(this)));
+    }
+}
+
+// XComponent
+
+void Package::dispose()
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::dispose();
+}
+
+
+void Package::addEventListener(
+    Reference<lang::XEventListener> const & xListener )
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::addEventListener( xListener );
+}
+
+
+void Package::removeEventListener(
+    Reference<lang::XEventListener> const & xListener )
+{
+    //Do not call check here. We must not throw an exception here if the object
+    //is being disposed or is already disposed. See com.sun.star.lang.XComponent
+    WeakComponentImplHelperBase::removeEventListener( xListener );
+}
+
+// XModifyBroadcaster
+
+void Package::addModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+    check();
+    rBHelper.addListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+
+void Package::removeModifyListener(
+    Reference<util::XModifyListener> const & xListener )
+{
+    check();
+    rBHelper.removeListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
+}
+
+
+void Package::checkAborted(
+    ::rtl::Reference<AbortChannel> const & abortChannel )
+{
+    if (abortChannel.is() && abortChannel->isAborted()) {
+        throw CommandAbortedException(
+            "abort!", static_cast<OWeakObject *>(this) );
+    }
+}
+
+// XPackage
+
+Reference<task::XAbortChannel> Package::createAbortChannel()
+{
+    check();
+    return new AbortChannel;
+}
+
+
+sal_Bool Package::isBundle()
+{
+    return false; // default
+}
+
+
+::sal_Int32 Package::checkPrerequisites(
+        const css::uno::Reference< css::task::XAbortChannel >&,
+        const css::uno::Reference< css::ucb::XCommandEnvironment >&,
+        sal_Bool)
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return 0;
+}
+
+
+sal_Bool Package::checkDependencies(
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return true;
+}
+
+
+Sequence< Reference<deployment::XPackage> > Package::getBundle(
+    Reference<task::XAbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    return Sequence< Reference<deployment::XPackage> >();
+}
+
+
+OUString Package::getName()
+{
+    return m_name;
+}
+
+beans::Optional<OUString> Package::getIdentifier()
+{
+    if (m_bRemoved)
+        return beans::Optional<OUString>(true, m_identifier);
+
+    return beans::Optional<OUString>();
+}
+
+
+OUString Package::getVersion()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return OUString();
+}
+
+
+OUString Package::getURL()
+{
+    return m_url;
+}
+
+
+OUString Package::getDisplayName()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return m_displayName;
+}
+
+
+OUString Package::getDescription()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return OUString();
+}
+
+
+OUString Package::getLicenseText()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return OUString();
+}
+
+
+Sequence<OUString> Package::getUpdateInformationURLs()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return Sequence<OUString>();
+}
+
+
+css::beans::StringPair Package::getPublisherInfo()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    css::beans::StringPair aEmptyPair;
+    return aEmptyPair;
+}
+
+
+uno::Reference< css::graphic::XGraphic > Package::getIcon( sal_Bool /*bHighContrast*/ )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    uno::Reference< css::graphic::XGraphic > aEmpty;
+    return aEmpty;
+}
+
+
+Reference<deployment::XPackageTypeInfo> Package::getPackageType()
+{
+    return m_xPackageType;
+}
+
+void Package::exportTo(
+    OUString const & destFolderURL, OUString const & newTitle,
+    sal_Int32 nameClashAction, Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    ::ucbhelper::Content destFolder( destFolderURL, xCmdEnv, getMyBackend()->getComponentContext() );
+    ::ucbhelper::Content sourceContent( getURL(), xCmdEnv, getMyBackend()->getComponentContext() );
+    bool bOk=true;
+    try
+    {
+        destFolder.transferContent(
+            sourceContent, ::ucbhelper::InsertOperation::Copy,
+            newTitle, nameClashAction);
+    }
+    catch (const css::ucb::ContentCreationException&)
+    {
+        bOk = false;
+    }
+
+    if (!bOk)
+        throw RuntimeException( "UCB transferContent() failed!", nullptr );
+}
+
+void Package::fireModified()
+{
+    ::cppu::OInterfaceContainerHelper * container = rBHelper.getContainer(
+        cppu::UnoType<util::XModifyListener>::get() );
+    if (container == nullptr)
+        return;
+
+    const Sequence< Reference<XInterface> > elements(
+        container->getElements() );
+    lang::EventObject evt( static_cast<OWeakObject *>(this) );
+    for ( const Reference<XInterface>& x : elements )
+    {
+        Reference<util::XModifyListener> xListener( x, UNO_QUERY );
+        if (xListener.is())
+            xListener->modified( evt );
+    }
+}
+
+// XPackage
+
+beans::Optional< beans::Ambiguous<sal_Bool> > Package::isRegistered(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    try {
+        ::osl::ResettableMutexGuard guard( m_aMutex );
+        return isRegistered_( guard,
+                              AbortChannel::get(xAbortChannel),
+                              xCmdEnv );
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const CommandFailedException &) {
+        throw;
+    }
+    catch (const CommandAbortedException &) {
+        throw;
+    }
+    catch (const deployment::DeploymentException &) {
+        throw;
+    }
+    catch (const Exception & e) {
+        Any exc( ::cppu::getCaughtException() );
+        throw deployment::DeploymentException(
+            "unexpected " + exc.getValueTypeName() + ": " + e.Message,
+            static_cast<OWeakObject *>(this), exc );
+    }
+}
+
+
+void Package::processPackage_impl(
+    bool doRegisterPackage,
+    bool startup,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    check();
+    bool action = false;
+
+    try {
+        try {
+            ::osl::ResettableMutexGuard guard( m_aMutex );
+            beans::Optional< beans::Ambiguous<sal_Bool> > option(
+                isRegistered_( guard, AbortChannel::get(xAbortChannel),
+                               xCmdEnv ) );
+            action = (option.IsPresent &&
+                      (option.Value.IsAmbiguous ||
+                       (doRegisterPackage ? !option.Value.Value
+                                        : option.Value.Value)));
+            if (action) {
+
+                OUString displayName = isRemoved() ? getName() : getDisplayName();
+                ProgressLevel progress(
+                    xCmdEnv,
+                    (doRegisterPackage
+                     ? PackageRegistryBackend::StrRegisteringPackage()
+                     : PackageRegistryBackend::StrRevokingPackage())
+                    + displayName );
+                processPackage_( guard,
+                                 doRegisterPackage,
+                                 startup,
+                                 AbortChannel::get(xAbortChannel),
+                                 xCmdEnv );
+            }
+        }
+        catch (lang::IllegalArgumentException &) {
+            Any e(cppu::getCaughtException());
+            throw deployment::DeploymentException(
+                ((doRegisterPackage
+                  ? DpResId(RID_STR_ERROR_WHILE_REGISTERING)
+                  : DpResId(RID_STR_ERROR_WHILE_REVOKING))
+                 + getDisplayName()),
+                static_cast< OWeakObject * >(this), e);
+        }
+        catch (const RuntimeException &) {
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "unexpected");
+            throw;
+        }
+        catch (const CommandFailedException &) {
+            throw;
+        }
+        catch (const CommandAbortedException &) {
+            throw;
+        }
+        catch (const deployment::DeploymentException &) {
+            throw;
+        }
+        catch (const Exception & e) {
+            Any exc( ::cppu::getCaughtException() );
+            throw deployment::DeploymentException(
+                (doRegisterPackage
+                 ? DpResId(RID_STR_ERROR_WHILE_REGISTERING)
+                 : DpResId(RID_STR_ERROR_WHILE_REVOKING))
+                + getDisplayName() + ": " + exc.getValueType().getTypeName() + " \"" + e.Message
+                + "\"",
+                static_cast<OWeakObject *>(this), exc );
+        }
+    }
+    catch (...) {
+        if (action)
+            fireModified();
+        throw;
+    }
+    if (action)
+        fireModified();
+}
+
+
+void Package::registerPackage(
+    sal_Bool startup,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    processPackage_impl( true /* register */, startup, xAbortChannel, xCmdEnv );
+}
+
+
+void Package::revokePackage(
+    sal_Bool startup,
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    processPackage_impl( false /* revoke */, startup, xAbortChannel, xCmdEnv );
+
+}
+
+PackageRegistryBackend * Package::getMyBackend() const
+{
+    PackageRegistryBackend * pBackend = m_myBackend.get();
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException(
+            "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<Package *>(this)));
+    }
+    return pBackend;
+}
+
+OUString Package::getRepositoryName()
+{
+    PackageRegistryBackend * backEnd = getMyBackend();
+    return backEnd->getContext();
+}
+
+beans::Optional< OUString > Package::getRegistrationDataURL()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return beans::Optional<OUString>();
+}
+
+sal_Bool Package::isRemoved()
+{
+    return m_bRemoved;
+}
+
+Package::TypeInfo::~TypeInfo()
+{
+}
+
+// XPackageTypeInfo
+
+OUString Package::TypeInfo::getMediaType()
+{
+    return m_mediaType;
+}
+
+
+OUString Package::TypeInfo::getDescription()
+{
+    return getShortDescription();
+}
+
+
+OUString Package::TypeInfo::getShortDescription()
+{
+    return m_shortDescr;
+}
+
+OUString Package::TypeInfo::getFileFilter()
+{
+    return m_fileFilter;
+}
+
+Any Package::TypeInfo::getIcon( sal_Bool /*highContrast*/, sal_Bool /*smallIcon*/ )
+{
+    return Any();
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/dp_backenddb.cxx b/desktop/source/deployment/registry/dp_backenddb.cxx
new file mode 100644
index 000000000..28effd95c
--- /dev/null
+++ b/desktop/source/deployment/registry/dp_backenddb.cxx
@@ -0,0 +1,655 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <osl/file.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/xml/dom/DocumentBuilder.hpp>
+#include <com/sun/star/xml/xpath/XPathAPI.hpp>
+#include <com/sun/star/io/XActiveDataSource.hpp>
+#include <com/sun/star/io/XActiveDataControl.hpp>
+#include <dp_misc.h>
+#include <ucbhelper/content.hxx>
+#include <xmlscript/xml_helper.hxx>
+#include <dp_backenddb.hxx>
+
+
+using namespace ::com::sun::star::uno;
+
+
+namespace dp_registry::backend {
+
+BackendDb::BackendDb(
+    Reference<css::uno::XComponentContext> const &  xContext,
+    OUString const & url):
+    m_xContext(xContext)
+{
+    m_urlDb = dp_misc::expandUnoRcUrl(url);
+}
+
+void BackendDb::save()
+{
+    const Reference<css::io::XActiveDataSource> xDataSource(m_doc,css::uno::UNO_QUERY_THROW);
+    std::vector<sal_Int8> bytes;
+    xDataSource->setOutputStream(::xmlscript::createOutputStream(&bytes));
+    const Reference<css::io::XActiveDataControl> xDataControl(m_doc,css::uno::UNO_QUERY_THROW);
+    xDataControl->start();
+
+    const Reference<css::io::XInputStream> xData(
+        ::xmlscript::createInputStream(std::move(bytes)));
+    ::ucbhelper::Content ucbDb(m_urlDb, nullptr, m_xContext);
+    ucbDb.writeStream(xData, true /*replace existing*/);
+}
+
+css::uno::Reference<css::xml::dom::XDocument> const & BackendDb::getDocument()
+{
+    if (!m_doc.is())
+    {
+        const Reference<css::xml::dom::XDocumentBuilder> xDocBuilder(
+            css::xml::dom::DocumentBuilder::create(m_xContext) );
+
+        ::osl::DirectoryItem item;
+        ::osl::File::RC err = ::osl::DirectoryItem::get(m_urlDb, item);
+        if (err == ::osl::File::E_None)
+        {
+            ::ucbhelper::Content descContent(
+                m_urlDb, css::uno::Reference<css::ucb::XCommandEnvironment>(),
+                m_xContext);
+            Reference<css::io::XInputStream> xIn = descContent.openStream();
+            m_doc = xDocBuilder->parse(xIn);
+        }
+        else if (err == ::osl::File::E_NOENT)
+        {
+            //Create a new document and insert some basic stuff
+            m_doc = xDocBuilder->newDocument();
+            const Reference<css::xml::dom::XElement> rootNode =
+                m_doc->createElementNS(getDbNSName(), getNSPrefix() +
+                                       ":" + getRootElementName());
+
+            m_doc->appendChild(Reference<css::xml::dom::XNode>(
+                                   rootNode, UNO_QUERY_THROW));
+            save();
+        }
+        else
+            throw css::uno::RuntimeException(
+                "Extension manager could not access database file:"
+                + m_urlDb, nullptr);
+
+        if (!m_doc.is())
+            throw css::uno::RuntimeException(
+                "Extension manager could not get root node of data base file: "
+                      + m_urlDb, nullptr);
+    }
+
+    return m_doc;
+}
+
+Reference<css::xml::xpath::XXPathAPI> const & BackendDb::getXPathAPI()
+{
+    if (!m_xpathApi.is())
+    {
+        m_xpathApi = css::xml::xpath::XPathAPI::create( m_xContext );
+
+        m_xpathApi->registerNS( getNSPrefix(), getDbNSName() );
+    }
+
+    return m_xpathApi;
+}
+
+void BackendDb::removeElement(OUString const & sXPathExpression)
+{
+    try
+    {
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+        const Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+        const Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        //find the extension element that is to be removed
+        const Reference<css::xml::dom::XNode> aNode =
+            xpathApi->selectSingleNode(root, sXPathExpression);
+
+        if (aNode.is())
+        {
+            root->removeChild(aNode);
+            save();
+        }
+
+#if    OSL_DEBUG_LEVEL > 0
+        //There must not be any other entry with the same url
+        const Reference<css::xml::dom::XNode> nextNode =
+            xpathApi->selectSingleNode(root, sXPathExpression);
+        OSL_ASSERT(! nextNode.is());
+#endif
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+void BackendDb::removeEntry(std::u16string_view url)
+{
+    const OUString sKeyElement = getKeyElementName();
+    const OUString sPrefix = getNSPrefix();
+    OUString sExpression =
+        sPrefix +
+        ":" +
+        sKeyElement +
+        "[@url = \"" +
+        url +
+        "\"]";
+
+    removeElement(sExpression);
+}
+
+void BackendDb::revokeEntry(std::u16string_view url)
+{
+    try
+    {
+        Reference<css::xml::dom::XElement> entry(getKeyElement(url), UNO_QUERY);
+        if (entry.is())
+        {
+            entry->setAttribute("revoked", "true");
+            save();
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to revoke data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+bool BackendDb::activateEntry(std::u16string_view url)
+{
+    try
+    {
+        bool ret = false;
+        Reference<css::xml::dom::XElement> entry(getKeyElement(url), UNO_QUERY);
+        if (entry.is())
+        {
+            //no attribute "active" means it is active, that is, registered.
+            entry->removeAttribute("revoked");
+            save();
+            ret = true;
+        }
+        return ret;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to revoke data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+bool BackendDb::hasActiveEntry(std::u16string_view url)
+{
+    try
+    {
+        bool ret = false;
+        Reference<css::xml::dom::XElement> entry(getKeyElement(url), UNO_QUERY);
+        if (entry.is())
+        {
+            OUString sActive = entry->getAttribute("revoked");
+            if (!(sActive == "true"))
+                ret = true;
+        }
+        return ret;
+
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to determine an active entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+Reference<css::xml::dom::XNode> BackendDb::getKeyElement(
+    std::u16string_view url)
+{
+    try
+    {
+        const OUString sPrefix = getNSPrefix();
+        const OUString sKeyElement = getKeyElementName();
+        OUString sExpression =
+            sPrefix +
+            ":" +
+            sKeyElement +
+            "[@url = \"" +
+            url +
+            "\"]";
+
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+        const Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+        const Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        return xpathApi->selectSingleNode(root, sExpression);
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read key element in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+//Only writes the data if there is at least one entry
+void BackendDb::writeVectorOfPair(
+    std::vector< std::pair< OUString, OUString > > const & vecPairs,
+    std::u16string_view sVectorTagName,
+    std::u16string_view sPairTagName,
+    std::u16string_view sFirstTagName,
+    std::u16string_view sSecondTagName,
+    css::uno::Reference<css::xml::dom::XNode> const & xParent)
+{
+    try{
+        if (vecPairs.empty())
+            return;
+        const OUString sNameSpace = getDbNSName();
+        OSL_ASSERT(!sNameSpace.isEmpty());
+        const OUString sPrefix(getNSPrefix() + ":");
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+
+        const Reference<css::xml::dom::XElement> vectorNode(
+            doc->createElementNS(sNameSpace, sPrefix + sVectorTagName));
+
+        xParent->appendChild(
+            Reference<css::xml::dom::XNode>(
+                vectorNode, css::uno::UNO_QUERY_THROW));
+        for (auto const& vecPair : vecPairs)
+        {
+            const Reference<css::xml::dom::XElement> pairNode(
+                doc->createElementNS(sNameSpace, sPrefix + sPairTagName));
+
+            vectorNode->appendChild(
+                Reference<css::xml::dom::XNode>(
+                    pairNode, css::uno::UNO_QUERY_THROW));
+
+            const Reference<css::xml::dom::XElement> firstNode(
+                doc->createElementNS(sNameSpace, sPrefix + sFirstTagName));
+
+            pairNode->appendChild(
+                Reference<css::xml::dom::XNode>(
+                    firstNode, css::uno::UNO_QUERY_THROW));
+
+            const Reference<css::xml::dom::XText> firstTextNode(
+                doc->createTextNode( vecPair.first));
+
+            firstNode->appendChild(
+                Reference<css::xml::dom::XNode>(
+                    firstTextNode, css::uno::UNO_QUERY_THROW));
+
+            const Reference<css::xml::dom::XElement> secondNode(
+                doc->createElementNS(sNameSpace, sPrefix + sSecondTagName));
+
+            pairNode->appendChild(
+                Reference<css::xml::dom::XNode>(
+                    secondNode, css::uno::UNO_QUERY_THROW));
+
+            const Reference<css::xml::dom::XText> secondTextNode(
+                doc->createTextNode( vecPair.second));
+
+            secondNode->appendChild(
+                Reference<css::xml::dom::XNode>(
+                    secondTextNode, css::uno::UNO_QUERY_THROW));
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+std::vector< std::pair< OUString, OUString > >
+BackendDb::readVectorOfPair(
+    Reference<css::xml::dom::XNode> const & parent,
+    std::u16string_view sListTagName,
+    std::u16string_view sPairTagName,
+    std::u16string_view sFirstTagName,
+    std::u16string_view sSecondTagName)
+{
+    try
+    {
+        OSL_ASSERT(parent.is());
+        const OUString sPrefix(getNSPrefix() + ":");
+        const Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        const OUString sExprPairs(
+            sPrefix + sListTagName + "/" + sPrefix + sPairTagName);
+        const Reference<css::xml::dom::XNodeList> listPairs =
+            xpathApi->selectNodeList(parent, sExprPairs);
+
+        std::vector< std::pair< OUString, OUString > > retVector;
+        sal_Int32 length = listPairs->getLength();
+        for (sal_Int32 i = 0; i < length; i++)
+        {
+            const Reference<css::xml::dom::XNode> aPair = listPairs->item(i);
+            const OUString sExprFirst(sPrefix + sFirstTagName + "/text()");
+            const Reference<css::xml::dom::XNode> first =
+                xpathApi->selectSingleNode(aPair, sExprFirst);
+
+            const OUString sExprSecond(sPrefix + sSecondTagName + "/text()");
+            const Reference<css::xml::dom::XNode> second =
+                xpathApi->selectSingleNode(aPair, sExprSecond);
+            OSL_ASSERT(first.is() && second.is());
+
+            retVector.emplace_back(
+                                    first->getNodeValue(), second->getNodeValue());
+        }
+        return retVector;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+//Only writes the data if there is at least one entry
+void BackendDb::writeSimpleList(
+    std::deque< OUString> const & list,
+    std::u16string_view sListTagName,
+    std::u16string_view sMemberTagName,
+    Reference<css::xml::dom::XNode> const & xParent)
+{
+    try
+    {
+        if (list.empty())
+            return;
+        const OUString sNameSpace = getDbNSName();
+        const OUString sPrefix(getNSPrefix() + ":");
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+
+        const Reference<css::xml::dom::XElement> listNode(
+            doc->createElementNS(sNameSpace, sPrefix + sListTagName));
+
+        xParent->appendChild(
+            Reference<css::xml::dom::XNode>(
+                listNode, css::uno::UNO_QUERY_THROW));
+
+        for (auto const& elem : list)
+        {
+            const Reference<css::xml::dom::XNode> memberNode(
+                doc->createElementNS(sNameSpace, sPrefix + sMemberTagName), css::uno::UNO_QUERY_THROW);
+
+            listNode->appendChild(memberNode);
+
+            const Reference<css::xml::dom::XNode> textNode(
+                doc->createTextNode(elem), css::uno::UNO_QUERY_THROW);
+
+            memberNode->appendChild(textNode);
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+//Writes only the element if is has a value.
+//The prefix is automatically added to the element name
+void BackendDb::writeSimpleElement(
+    std::u16string_view sElementName, OUString const & value,
+    Reference<css::xml::dom::XNode> const & xParent)
+{
+    try
+    {
+        if (value.isEmpty())
+            return;
+        const OUString sPrefix = getNSPrefix();
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+        const OUString sNameSpace = getDbNSName();
+        const Reference<css::xml::dom::XNode> dataNode(
+            doc->createElementNS(sNameSpace, sPrefix + ":" + sElementName),
+            UNO_QUERY_THROW);
+        xParent->appendChild(dataNode);
+
+        const Reference<css::xml::dom::XNode> dataValue(
+            doc->createTextNode(value), UNO_QUERY_THROW);
+        dataNode->appendChild(dataValue);
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry(writeSimpleElement) in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+
+}
+
+/// The key elements have a url attribute and are always children of the root element.
+Reference<css::xml::dom::XNode> BackendDb::writeKeyElement(
+    OUString const & url)
+{
+    try
+    {
+        const OUString sNameSpace = getDbNSName();
+        const OUString sPrefix = getNSPrefix();
+        const OUString sElementName = getKeyElementName();
+        const Reference<css::xml::dom::XDocument> doc = getDocument();
+        const Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+
+        //Check if there are an entry with the same url. This can be the case if the
+        //status of an XPackage is ambiguous. In this case a call to activateExtension
+        //(dp_extensionmanager.cxx), will register the package again. See also
+        //Package::processPackage_impl in dp_backend.cxx.
+        //A package can become
+        //invalid after its successful registration, for example if a second extension with
+        //the same service is installed.
+        const OUString sExpression(
+            sPrefix + ":" + sElementName + "[@url = \"" + url + "\"]");
+        const Reference<css::xml::dom::XNode> existingNode =
+            getXPathAPI()->selectSingleNode(root, sExpression);
+        if (existingNode.is())
+        {
+            OSL_ASSERT(false);
+            //replace the existing entry.
+            removeEntry(url);
+        }
+
+        const Reference<css::xml::dom::XElement> keyElement(
+            doc->createElementNS(sNameSpace, sPrefix +  ":" + sElementName));
+
+        keyElement->setAttribute("url", url);
+
+        const Reference<css::xml::dom::XNode> keyNode(
+            keyElement, UNO_QUERY_THROW);
+        root->appendChild(keyNode);
+        return keyNode;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write key element in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+OUString BackendDb::readSimpleElement(
+    std::u16string_view sElementName, Reference<css::xml::dom::XNode> const & xParent)
+{
+    try
+    {
+        const OUString sPrefix = getNSPrefix();
+        const OUString sExpr(sPrefix + ":" + sElementName + "/text()");
+        const Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        const Reference<css::xml::dom::XNode> val =
+            xpathApi->selectSingleNode(xParent, sExpr);
+        if (val.is())
+            return val->getNodeValue();
+        return OUString();
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data (readSimpleElement) in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+
+std::deque< OUString> BackendDb::readList(
+    Reference<css::xml::dom::XNode> const & parent,
+    std::u16string_view sListTagName,
+    std::u16string_view sMemberTagName)
+{
+    try
+    {
+        OSL_ASSERT(parent.is());
+        const OUString sPrefix(getNSPrefix() + ":");
+        const Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        const OUString sExprList(
+            sPrefix + sListTagName + "/" + sPrefix + sMemberTagName + "/text()");
+        const Reference<css::xml::dom::XNodeList> list =
+            xpathApi->selectNodeList(parent, sExprList);
+
+        std::deque<OUString > retList;
+        sal_Int32 length = list->getLength();
+        for (sal_Int32 i = 0; i < length; i++)
+        {
+            const Reference<css::xml::dom::XNode> member = list->item(i);
+            retList.push_back(member->getNodeValue());
+        }
+        return retList;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+std::vector<OUString> BackendDb::getOneChildFromAllEntries(
+    std::u16string_view name)
+{
+    try
+    {
+        std::vector<OUString> listRet;
+        Reference<css::xml::dom::XDocument> doc = getDocument();
+        Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+
+        Reference<css::xml::xpath::XXPathAPI> xpathApi = getXPathAPI();
+        const OUString sPrefix = getNSPrefix();
+        const OUString sKeyElement = getKeyElementName();
+        OUString sNodeSelectExpr =
+            sPrefix +
+            ":" +
+            sKeyElement +
+            "/" +
+            sPrefix +
+            ":" +
+            name +
+            "/text()";
+
+        Reference<css::xml::dom::XNodeList> nodes =
+            xpathApi->selectNodeList(root, sNodeSelectExpr);
+        if (nodes.is())
+        {
+            sal_Int32 length = nodes->getLength();
+            for (sal_Int32 i = 0; i < length; i++)
+                listRet.push_back(nodes->item(i)->getNodeValue());
+        }
+        return listRet;
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+
+RegisteredDb::RegisteredDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):BackendDb(xContext, url)
+{
+}
+
+void RegisteredDb::addEntry(OUString const & url)
+{
+    try{
+        if (!activateEntry(url))
+        {
+            const OUString sNameSpace = getDbNSName();
+            const OUString sPrefix = getNSPrefix();
+            const OUString sEntry = getKeyElementName();
+
+            Reference<css::xml::dom::XDocument> doc = getDocument();
+            Reference<css::xml::dom::XNode> root = doc->getFirstChild();
+
+#if    OSL_DEBUG_LEVEL > 0
+            //There must not be yet an entry with the same url
+            OUString sExpression(
+                sPrefix + ":" + sEntry + "[@url = \"" + url + "\"]");
+            Reference<css::xml::dom::XNode> _extensionNode =
+                getXPathAPI()->selectSingleNode(root, sExpression);
+            OSL_ASSERT(! _extensionNode.is());
+#endif
+            Reference<css::xml::dom::XElement> helpElement(
+                doc->createElementNS(sNameSpace, sPrefix +  ":" + sEntry));
+
+            helpElement->setAttribute("url", url);
+
+            Reference<css::xml::dom::XNode> helpNode(
+                helpElement, UNO_QUERY_THROW);
+            root->appendChild(helpNode);
+
+            save();
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+} // namespace dp_registry
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/dp_registry.cxx b/desktop/source/deployment/registry/dp_registry.cxx
new file mode 100644
index 000000000..961afe7bb
--- /dev/null
+++ b/desktop/source/deployment/registry/dp_registry.cxx
@@ -0,0 +1,528 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+#include <sal/log.hxx>
+
+#include <dp_shared.hxx>
+#include <dp_package.hxx>
+#include <strings.hrc>
+#include <dp_registry.hxx>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <osl/diagnose.h>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/uri.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <comphelper/sequence.hxx>
+#include <ucbhelper/content.hxx>
+#include <o3tl/string_view.hxx>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <com/sun/star/uno/DeploymentException.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XSingleComponentFactory.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <com/sun/star/util/XUpdatable.hpp>
+#include <com/sun/star/container/XContentEnumerationAccess.hpp>
+#include <com/sun/star/deployment/XPackageTypeInfo.hpp>
+#include <com/sun/star/deployment/XPackageRegistry.hpp>
+#include <set>
+#include <string_view>
+#include <unordered_map>
+#include <unordered_set>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+
+namespace dp_registry {
+
+namespace {
+
+typedef ::cppu::WeakComponentImplHelper<
+    deployment::XPackageRegistry, util::XUpdatable > t_helper;
+
+
+class PackageRegistryImpl : private cppu::BaseMutex, public t_helper
+{
+    struct ci_string_hash {
+        std::size_t operator () ( OUString const & str ) const {
+            return str.toAsciiLowerCase().hashCode();
+        }
+    };
+    struct ci_string_equals {
+        bool operator () ( std::u16string_view str1, std::u16string_view str2 ) const{
+            return o3tl::equalsIgnoreAsciiCase( str1, str2 );
+        }
+    };
+    typedef std::unordered_map<
+        OUString, Reference<deployment::XPackageRegistry>,
+        ci_string_hash, ci_string_equals > t_string2registry;
+    typedef std::unordered_map<
+        OUString, OUString,
+        ci_string_hash, ci_string_equals > t_string2string;
+    typedef std::set<
+        Reference<deployment::XPackageRegistry> > t_registryset;
+
+    t_string2registry m_mediaType2backend;
+    t_string2string m_filter2mediaType;
+    t_registryset m_ambiguousBackends;
+    t_registryset m_allBackends;
+    std::vector< Reference<deployment::XPackageTypeInfo> > m_typesInfos;
+
+    void insertBackend(
+        Reference<deployment::XPackageRegistry> const & xBackend );
+
+protected:
+    void check();
+    virtual void SAL_CALL disposing() override;
+
+    virtual ~PackageRegistryImpl() override;
+    PackageRegistryImpl() : t_helper( m_aMutex ) {}
+
+
+public:
+    static Reference<deployment::XPackageRegistry> create(
+        OUString const & context,
+        OUString const & cachePath,
+        Reference<XComponentContext> const & xComponentContext );
+
+    // XUpdatable
+    virtual void SAL_CALL update() override;
+
+    // XPackageRegistry
+    virtual Reference<deployment::XPackage> SAL_CALL bindPackage(
+        OUString const & url, OUString const & mediaType, sal_Bool bRemoved,
+        OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv ) override;
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+};
+
+
+void PackageRegistryImpl::check()
+{
+    ::osl::MutexGuard guard( m_aMutex );
+    if (rBHelper.bInDispose || rBHelper.bDisposed) {
+        throw lang::DisposedException(
+            "PackageRegistry instance has already been disposed!",
+            static_cast<OWeakObject *>(this) );
+    }
+}
+
+
+void PackageRegistryImpl::disposing()
+{
+    // dispose all backends:
+    for (auto const& backend : m_allBackends)
+    {
+        try_dispose(backend);
+    }
+    m_mediaType2backend = t_string2registry();
+    m_ambiguousBackends = t_registryset();
+    m_allBackends = t_registryset();
+
+    t_helper::disposing();
+}
+
+
+PackageRegistryImpl::~PackageRegistryImpl()
+{
+}
+
+
+OUString normalizeMediaType( std::u16string_view mediaType )
+{
+    OUStringBuffer buf;
+    sal_Int32 index = 0;
+    for (;;) {
+        buf.append( o3tl::trim(o3tl::getToken(mediaType, 0, '/', index )) );
+        if (index < 0)
+            break;
+        buf.append( '/' );
+    }
+    return buf.makeStringAndClear();
+}
+
+
+void PackageRegistryImpl::packageRemoved(
+    OUString const & url, OUString const & mediaType)
+{
+    const t_string2registry::const_iterator i =
+        m_mediaType2backend.find(mediaType);
+
+    if (i != m_mediaType2backend.end())
+    {
+        i->second->packageRemoved(url, mediaType);
+    }
+}
+
+void PackageRegistryImpl::insertBackend(
+    Reference<deployment::XPackageRegistry> const & xBackend )
+{
+    m_allBackends.insert( xBackend );
+    std::unordered_set<OUString> ambiguousFilters;
+
+    const Sequence< Reference<deployment::XPackageTypeInfo> > packageTypes(
+        xBackend->getSupportedPackageTypes() );
+    for ( Reference<deployment::XPackageTypeInfo> const & xPackageType : packageTypes )
+    {
+        m_typesInfos.push_back( xPackageType );
+
+        const OUString mediaType( normalizeMediaType(
+                                      xPackageType->getMediaType() ) );
+        std::pair<t_string2registry::iterator, bool> a_insertion(
+            m_mediaType2backend.emplace( mediaType, xBackend ) );
+        if (a_insertion.second)
+        {
+            // add parameterless media-type, too:
+            sal_Int32 semi = mediaType.indexOf( ';' );
+            if (semi >= 0) {
+                m_mediaType2backend.emplace( mediaType.copy( 0, semi ), xBackend );
+            }
+            const OUString fileFilter( xPackageType->getFileFilter() );
+            //The package backend shall also be called to determine the mediatype
+            //(XPackageRegistry.bindPackage) when the URL points to a directory.
+            const bool bExtension = (mediaType == "application/vnd.sun.star.package-bundle");
+            if (fileFilter.isEmpty() || fileFilter == "*.*" || fileFilter == "*" || bExtension)
+            {
+                m_ambiguousBackends.insert( xBackend );
+            }
+            else
+            {
+                sal_Int32 nIndex = 0;
+                do {
+                    OUString token( fileFilter.getToken( 0, ';', nIndex ) );
+                    if (token.match( "*." ))
+                        token = token.copy( 1 );
+                    if (token.isEmpty())
+                        continue;
+                    // mark any further wildcards ambig:
+                    bool ambig = (token.indexOf('*') >= 0 ||
+                                  token.indexOf('?') >= 0);
+                    if (! ambig) {
+                        std::pair<t_string2string::iterator, bool> ins(
+                            m_filter2mediaType.emplace(
+                                    token, mediaType ) );
+                        ambig = !ins.second;
+                        if (ambig) {
+                            // filter has already been in: add previously
+                            // added backend to ambig set
+                            const t_string2registry::const_iterator iFind(
+                                m_mediaType2backend.find(
+                                    /* media-type of pr. added backend */
+                                    ins.first->second ) );
+                            OSL_ASSERT(
+                                iFind != m_mediaType2backend.end() );
+                            if (iFind != m_mediaType2backend.end())
+                                m_ambiguousBackends.insert( iFind->second );
+                        }
+                    }
+                    if (ambig) {
+                        m_ambiguousBackends.insert( xBackend );
+                        // mark filter to be removed later from filters map:
+                        ambiguousFilters.insert( token );
+                    }
+                }
+                while (nIndex >= 0);
+            }
+        }
+#if OSL_DEBUG_LEVEL > 0
+        else
+        {
+            SAL_WARN( "desktop", "more than one PackageRegistryBackend for media-type=\""
+                    << mediaType
+                    << "\" => "
+                    <<  Reference<lang::XServiceInfo>(
+                            xBackend, UNO_QUERY_THROW )->getImplementationName()
+                    << "\"!" );
+        }
+#endif
+    }
+
+    // cut out ambiguous filters:
+    for (auto const& ambiguousFilter : ambiguousFilters)
+    {
+        m_filter2mediaType.erase(ambiguousFilter);
+    }
+}
+
+
+Reference<deployment::XPackageRegistry> PackageRegistryImpl::create(
+    OUString const & context,
+    OUString const & cachePath,
+    Reference<XComponentContext> const & xComponentContext )
+{
+    rtl::Reference<PackageRegistryImpl> that = new PackageRegistryImpl;
+
+    // auto-detect all registered package registries:
+    Reference<container::XEnumeration> xEnum(
+        Reference<container::XContentEnumerationAccess>(
+            xComponentContext->getServiceManager(),
+            UNO_QUERY_THROW )->createContentEnumeration(
+                "com.sun.star.deployment.PackageRegistryBackend" ) );
+    if (xEnum.is())
+    {
+        while (xEnum->hasMoreElements())
+        {
+            Any element( xEnum->nextElement() );
+            Sequence<Any> registryArgs(cachePath.isEmpty() ? 1 : 3 );
+            auto pregistryArgs = registryArgs.getArray();
+            pregistryArgs[ 0 ] <<= context;
+            if (!cachePath.isEmpty())
+            {
+                Reference<lang::XServiceInfo> xServiceInfo(
+                    element, UNO_QUERY_THROW );
+                OUString registryCachePath(
+                    makeURL( cachePath,
+                             ::rtl::Uri::encode(
+                                 xServiceInfo->getImplementationName(),
+                                 rtl_UriCharClassPchar,
+                                 rtl_UriEncodeIgnoreEscapes,
+                                 RTL_TEXTENCODING_UTF8 ) ) );
+                pregistryArgs[ 1 ] <<= registryCachePath;
+                pregistryArgs[ 2 ] <<= false; // readOnly;
+                create_folder( nullptr, registryCachePath,
+                               Reference<XCommandEnvironment>() );
+            }
+
+            Reference<deployment::XPackageRegistry> xBackend;
+            Reference<lang::XSingleComponentFactory> xFac( element, UNO_QUERY );
+            if (xFac.is()) {
+                xBackend.set(
+                    xFac->createInstanceWithArgumentsAndContext(
+                        registryArgs, xComponentContext ), UNO_QUERY );
+            }
+            else {
+                Reference<lang::XSingleServiceFactory> xSingleServiceFac(
+                    element, UNO_QUERY_THROW );
+                xBackend.set(
+                    xSingleServiceFac->createInstanceWithArguments(
+                        registryArgs ), UNO_QUERY );
+            }
+            if (! xBackend.is()) {
+                throw DeploymentException(
+                    "cannot instantiate PackageRegistryBackend service: "
+                    + Reference<lang::XServiceInfo>(
+                        element, UNO_QUERY_THROW )->getImplementationName(),
+                    static_cast<OWeakObject *>(that.get()) );
+            }
+
+            that->insertBackend( xBackend );
+        }
+    }
+
+    // Insert bundle back-end.
+    // Always register as last, because we want to add extensions also as folders
+    // and as a default we accept every folder, which was not recognized by the other
+    // backends.
+    Reference<deployment::XPackageRegistry> extensionBackend =
+        ::dp_registry::backend::bundle::create(
+            that, context, cachePath, xComponentContext);
+    that->insertBackend(extensionBackend);
+
+    Reference<lang::XServiceInfo> xServiceInfo(
+        extensionBackend, UNO_QUERY_THROW );
+
+    OSL_ASSERT(xServiceInfo.is());
+    OUString registryCachePath(
+        makeURL( cachePath,
+                 ::rtl::Uri::encode(
+                     xServiceInfo->getImplementationName(),
+                     rtl_UriCharClassPchar,
+                     rtl_UriEncodeIgnoreEscapes,
+                     RTL_TEXTENCODING_UTF8 ) ) );
+    create_folder( nullptr, registryCachePath, Reference<XCommandEnvironment>());
+
+
+#if OSL_DEBUG_LEVEL > 0
+    // dump tables:
+    {
+        t_registryset allBackends;
+        dp_misc::TRACE("> [dp_registry.cxx] media-type detection:\n\n" );
+        for (auto const& elem : that->m_filter2mediaType)
+        {
+            const Reference<deployment::XPackageRegistry> xBackend(
+                that->m_mediaType2backend.find( elem.second )->second );
+            allBackends.insert( xBackend );
+            dp_misc::TRACE(
+                "extension \"" + elem.first + "\" maps to media-type \"" + elem.second
+                + "\" maps to backend "
+                + Reference<lang::XServiceInfo>(
+                            xBackend, UNO_QUERY_THROW )
+                        ->getImplementationName()
+                + "\n");
+        }
+        dp_misc::TRACE( "> [dp_registry.cxx] ambiguous backends:\n\n" );
+        for (auto const& ambiguousBackend : that->m_ambiguousBackends)
+        {
+            OUStringBuffer buf;
+            buf.append(
+                Reference<lang::XServiceInfo>(
+                    ambiguousBackend, UNO_QUERY_THROW )->getImplementationName() );
+            buf.append( ": " );
+            const Sequence< Reference<deployment::XPackageTypeInfo> > types(
+                ambiguousBackend->getSupportedPackageTypes() );
+            for ( sal_Int32 pos = 0; pos < types.getLength(); ++pos ) {
+                Reference<deployment::XPackageTypeInfo> const & xInfo =
+                    types[ pos ];
+                buf.append( xInfo->getMediaType() );
+                const OUString filter( xInfo->getFileFilter() );
+                if (!filter.isEmpty()) {
+                    buf.append( " (" );
+                    buf.append( filter );
+                    buf.append( ")" );
+                }
+                if (pos < (types.getLength() - 1))
+                    buf.append( ", " );
+            }
+            dp_misc::TRACE(buf + "\n\n");
+        }
+        allBackends.insert( that->m_ambiguousBackends.begin(),
+                            that->m_ambiguousBackends.end() );
+        OSL_ASSERT( allBackends == that->m_allBackends );
+    }
+#endif
+
+    return that;
+}
+
+// XUpdatable: broadcast to backends
+
+void PackageRegistryImpl::update()
+{
+    check();
+    for (auto const& backend : m_allBackends)
+    {
+        const Reference<util::XUpdatable> xUpdatable(backend, UNO_QUERY);
+        if (xUpdatable.is())
+            xUpdatable->update();
+    }
+}
+
+// XPackageRegistry
+
+Reference<deployment::XPackage> PackageRegistryImpl::bindPackage(
+    OUString const & url, OUString const & mediaType_, sal_Bool bRemoved,
+    OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    check();
+    OUString mediaType(mediaType_);
+    if (mediaType.isEmpty())
+    {
+        ::ucbhelper::Content ucbContent;
+        bool bOk=true;
+
+        try
+        {
+            bOk = create_ucb_content(
+                    &ucbContent, url, xCmdEnv, false /* no throw */ )
+                    && !ucbContent.isFolder();
+        }
+        catch (const css::ucb::ContentCreationException&)
+        {
+            bOk = false;
+        }
+
+        if (bOk)
+        {
+            OUString title( StrTitle::getTitle( ucbContent ) );
+            for (;;)
+            {
+                const t_string2string::const_iterator iFind(
+                    m_filter2mediaType.find(title) );
+                if (iFind != m_filter2mediaType.end()) {
+                    mediaType = iFind->second;
+                    break;
+                }
+                sal_Int32 point = title.indexOf( '.', 1 /* consume . */ );
+                if (point < 0)
+                    break;
+                title = title.copy(point);
+            }
+        }
+    }
+    if (mediaType.isEmpty())
+    {
+        // try ambiguous backends:
+        for (auto const& ambiguousBackend : m_ambiguousBackends)
+        {
+            try {
+                return ambiguousBackend->bindPackage( url, mediaType, bRemoved,
+                    identifier, xCmdEnv );
+            }
+            catch (const lang::IllegalArgumentException &) {
+            }
+        }
+        throw lang::IllegalArgumentException(
+            DpResId(RID_STR_CANNOT_DETECT_MEDIA_TYPE) + url,
+            static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+    else
+    {
+        // get backend by media-type:
+        t_string2registry::const_iterator iFind(
+            m_mediaType2backend.find( normalizeMediaType(mediaType) ) );
+        if (iFind == m_mediaType2backend.end()) {
+            // xxx todo: more sophisticated media-type argument parsing...
+            sal_Int32 q = mediaType.indexOf( ';' );
+            if (q >= 0) {
+                iFind = m_mediaType2backend.find(
+                    normalizeMediaType(
+                        // cut parameters:
+                        mediaType.subView( 0, q ) ) );
+            }
+        }
+        if (iFind == m_mediaType2backend.end()) {
+            throw lang::IllegalArgumentException(
+                DpResId(RID_STR_UNSUPPORTED_MEDIA_TYPE) + mediaType,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+        }
+        return iFind->second->bindPackage( url, mediaType, bRemoved,
+            identifier, xCmdEnv );
+    }
+}
+
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+PackageRegistryImpl::getSupportedPackageTypes()
+{
+    return comphelper::containerToSequence(m_typesInfos);
+}
+} // anon namespace
+
+
+Reference<deployment::XPackageRegistry> create(
+    OUString const & context,
+    OUString const & cachePath,
+    Reference<XComponentContext> const & xComponentContext )
+{
+    return PackageRegistryImpl::create(
+        context, cachePath, xComponentContext );
+}
+
+} // namespace dp_registry
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/executable/dp_executable.cxx b/desktop/source/deployment/registry/executable/dp_executable.cxx
new file mode 100644
index 000000000..40b253587
--- /dev/null
+++ b/desktop/source/deployment/registry/executable/dp_executable.cxx
@@ -0,0 +1,336 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <memory>
+#include <string_view>
+
+#include <dp_misc.h>
+#include <dp_backend.h>
+#include <dp_ucb.h>
+#include <dp_interact.h>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <osl/file.hxx>
+#include <ucbhelper/content.hxx>
+#include <svl/inettype.hxx>
+#include "dp_executablebackenddb.hxx"
+#include <cppuhelper/supportsservice.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+using namespace dp_misc;
+
+namespace dp_registry::backend::executable {
+namespace {
+
+class BackendImpl : public ::dp_registry::backend::PackageRegistryBackend
+{
+    class ExecutablePackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<dp_misc::AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<dp_misc::AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+        bool getFileAttributes(sal_uInt64& out_Attributes);
+        bool isUrlTargetInExtension() const;
+
+    public:
+        ExecutablePackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool bRemoved, OUString const & identifier)
+            : Package( myBackend, url, name, name /* display-name */,
+                       xPackageType, bRemoved, identifier)
+            {}
+    };
+    friend class ExecutablePackageImpl;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType, bool bRemoved,
+        OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    void addDataToDb(OUString const & url);
+    bool hasActiveEntry(std::u16string_view url);
+    void revokeEntryFromDb(std::u16string_view url);
+
+    Reference<deployment::XPackageTypeInfo> m_xExecutableTypeInfo;
+    std::unique_ptr<ExecutableBackendDb> m_backendDb;
+public:
+    BackendImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+};
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : PackageRegistryBackend( args, xComponentContext ),
+      m_xExecutableTypeInfo(new Package::TypeInfo(
+                                "application/vnd.sun.star.executable",
+                                "", "Executable" ) )
+{
+    if (!transientMode())
+    {
+        OUString dbFile = makeURL(getCachePath(), "backenddb.xml");
+        m_backendDb.reset(
+            new ExecutableBackendDb(getComponentContext(), dbFile));
+    }
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.executable.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+void BackendImpl::addDataToDb(OUString const & url)
+{
+    if (m_backendDb)
+        m_backendDb->addEntry(url);
+}
+
+void BackendImpl::revokeEntryFromDb(std::u16string_view url)
+{
+    if (m_backendDb)
+        m_backendDb->revokeEntry(url);
+}
+
+bool BackendImpl::hasActiveEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->hasActiveEntry(url);
+    return false;
+}
+
+
+// XPackageRegistry
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return Sequence<Reference<deployment::XPackageTypeInfo> >(
+        & m_xExecutableTypeInfo, 1);
+}
+
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+// PackageRegistryBackend
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType, bool bRemoved,
+    OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    if (mediaType.isEmpty())
+    {
+        throw lang::IllegalArgumentException(
+            StrCannotDetectMediaType() + url,
+            static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            OUString name;
+            if (!bRemoved)
+            {
+                ::ucbhelper::Content ucbContent(
+                    url, xCmdEnv, getComponentContext() );
+                name = StrTitle::getTitle( ucbContent );
+            }
+            if (subType.equalsIgnoreAsciiCase("vnd.sun.star.executable"))
+            {
+                return new BackendImpl::ExecutablePackageImpl(
+                    this, url, name,  m_xExecutableTypeInfo, bRemoved,
+                    identifier);
+            }
+        }
+    }
+    return Reference<deployment::XPackage>();
+}
+
+
+// Package
+BackendImpl * BackendImpl::ExecutablePackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException( "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<ExecutablePackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::ExecutablePackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<dp_misc::AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    bool registered = getMyBackend()->hasActiveEntry(getURL());
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+            true /* IsPresent */,
+                beans::Ambiguous<sal_Bool>(
+                    registered, false /* IsAmbiguous */ ) );
+}
+
+void BackendImpl::ExecutablePackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool /*startup*/,
+    ::rtl::Reference<dp_misc::AbortChannel> const & abortChannel,
+    Reference<XCommandEnvironment> const & /*xCmdEnv*/ )
+{
+    checkAborted(abortChannel);
+    if (doRegisterPackage)
+    {
+        if (!isUrlTargetInExtension())
+        {
+            OSL_ASSERT(false);
+            return;
+        }
+        sal_uInt64 attributes = 0;
+        //Setting the executable attribute does not affect executables on Windows
+        if (getFileAttributes(attributes))
+        {
+            if(getMyBackend()->m_context == "user")
+                attributes |= osl_File_Attribute_OwnExe;
+            else if (getMyBackend()->m_context == "shared")
+                attributes |= (osl_File_Attribute_OwnExe | osl_File_Attribute_GrpExe
+                               | osl_File_Attribute_OthExe);
+            else if (getMyBackend()->m_context != "bundled")
+                //Bundled extensions are required to be in the properly
+                //installed. That is an executable must have the right flags
+                OSL_ASSERT(false);
+
+            //This won't have effect on Windows
+            osl::File::setAttributes(
+                    dp_misc::expandUnoRcUrl(m_url), attributes);
+        }
+        getMyBackend()->addDataToDb(getURL());
+    }
+    else
+    {
+        getMyBackend()->revokeEntryFromDb(getURL());
+    }
+}
+
+//We currently cannot check if this XPackage represents a content of a particular extension
+//But we can check if we are within $UNO_USER_PACKAGES_CACHE etc.
+//Done for security reasons. For example an extension manifest could contain a path to
+//an executable outside the extension.
+bool BackendImpl::ExecutablePackageImpl::isUrlTargetInExtension() const
+{
+    bool bSuccess = false;
+    OUString sExtensionDir;
+    if(getMyBackend()->m_context == "user")
+        sExtensionDir = dp_misc::expandUnoRcTerm("$UNO_USER_PACKAGES_CACHE");
+    else if (getMyBackend()->m_context == "shared")
+        sExtensionDir = dp_misc::expandUnoRcTerm("$UNO_SHARED_PACKAGES_CACHE");
+    else if (getMyBackend()->m_context == "bundled")
+        sExtensionDir = dp_misc::expandUnoRcTerm("$BUNDLED_EXTENSIONS");
+    else
+        OSL_ASSERT(false);
+    //remove file ellipses
+    if (osl::File::E_None == osl::File::getAbsoluteFileURL(OUString(), sExtensionDir, sExtensionDir))
+    {
+        OUString sFile;
+        if (osl::File::E_None == osl::File::getAbsoluteFileURL(
+            OUString(), dp_misc::expandUnoRcUrl(m_url), sFile))
+        {
+            if (sFile.match(sExtensionDir))
+                bSuccess = true;
+        }
+    }
+    return bSuccess;
+}
+
+bool BackendImpl::ExecutablePackageImpl::getFileAttributes(sal_uInt64& out_Attributes)
+{
+    bool bSuccess = false;
+    const OUString url(dp_misc::expandUnoRcUrl(m_url));
+    osl::DirectoryItem item;
+    if (osl::FileBase::E_None == osl::DirectoryItem::get(url, item))
+    {
+        osl::FileStatus aStatus(osl_FileStatus_Mask_Attributes);
+        if( osl::FileBase::E_None == item.getFileStatus(aStatus))
+        {
+            out_Attributes = aStatus.getAttributes();
+            bSuccess = true;
+        }
+    }
+    return bSuccess;
+}
+
+
+} // anon namespace
+
+
+} // namespace dp_registry::backend::executable
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_executable_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::executable::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/executable/dp_executablebackenddb.cxx b/desktop/source/deployment/registry/executable/dp_executablebackenddb.cxx
new file mode 100644
index 000000000..29cbf85b3
--- /dev/null
+++ b/desktop/source/deployment/registry/executable/dp_executablebackenddb.cxx
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include "dp_executablebackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/executable-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"exe";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"executable-backend-db";
+constexpr OUStringLiteral ENTRY_NAME = u"executable";
+
+namespace dp_registry::backend::executable {
+
+ExecutableBackendDb::ExecutableBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):RegisteredDb(xContext, url)
+{
+
+}
+
+OUString ExecutableBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString ExecutableBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString ExecutableBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString ExecutableBackendDb::getKeyElementName()
+{
+    return ENTRY_NAME;
+}
+
+
+} // namespace dp_registry::backend::executable
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/executable/dp_executablebackenddb.hxx b/desktop/source/deployment/registry/executable/dp_executablebackenddb.hxx
new file mode 100644
index 000000000..0561a8c54
--- /dev/null
+++ b/desktop/source/deployment/registry/executable/dp_executablebackenddb.hxx
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <dp_backenddb.hxx>
+
+namespace com::sun::star::uno
+{
+class XComponentContext;
+}
+
+namespace dp_registry::backend::executable
+{
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+   The format looks like this:
+
+<?xml version="1.0"?>
+ */
+class ExecutableBackendDb : public dp_registry::backend::RegisteredDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+
+    virtual OUString getNSPrefix() override;
+
+    virtual OUString getRootElementName() override;
+
+    virtual OUString getKeyElementName() override;
+
+public:
+    ExecutableBackendDb(css::uno::Reference<css::uno::XComponentContext> const& xContext,
+                        OUString const& url);
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/help/README.md b/desktop/source/deployment/registry/help/README.md
new file mode 100644
index 000000000..24ea19518
--- /dev/null
+++ b/desktop/source/deployment/registry/help/README.md
@@ -0,0 +1 @@
+Support for help integrated in extensions. Also see /README.help.md.
diff --git a/desktop/source/deployment/registry/help/dp_help.cxx b/desktop/source/deployment/registry/help/dp_help.cxx
new file mode 100644
index 000000000..9e1a75fb9
--- /dev/null
+++ b/desktop/source/deployment/registry/help/dp_help.cxx
@@ -0,0 +1,621 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <memory>
+#include <config_features.h>
+
+#include <strings.hrc>
+#include <dp_backend.h>
+#include <dp_misc.h>
+#include "dp_helpbackenddb.hxx"
+#include <dp_ucb.h>
+#include <rtl/uri.hxx>
+#include <osl/file.hxx>
+#include <ucbhelper/content.hxx>
+#include <svl/inettype.hxx>
+#include <unotools/pathoptions.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <o3tl/string_view.hxx>
+
+#if HAVE_FEATURE_XMLHELP
+#include <helpcompiler/compilehelp.hxx>
+#include <helpcompiler/HelpIndexer.hxx>
+#endif
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionRemovedException.hpp>
+#include <com/sun/star/ucb/SimpleFileAccess.hpp>
+#include <com/sun/star/util/XMacroExpander.hpp>
+#include <optional>
+#include <string_view>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend::help {
+namespace {
+
+
+class BackendImpl : public ::dp_registry::backend::PackageRegistryBackend
+{
+    class PackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+
+    public:
+        PackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url, OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool bRemoved, OUString const & identifier);
+
+        bool extensionContainsCompiledHelp();
+
+        //XPackage
+        virtual css::beans::Optional< OUString > SAL_CALL getRegistrationDataURL() override;
+    };
+    friend class PackageImpl;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    void implProcessHelp( PackageImpl * package, bool doRegisterPackage,
+                          Reference<ucb::XCommandEnvironment> const & xCmdEnv);
+    void implCollectXhpFiles( const OUString& aDir,
+        std::vector< OUString >& o_rXhpFileVector );
+
+    ::std::optional<HelpBackendDb::Data> readDataFromDb(std::u16string_view url);
+    bool hasActiveEntry(std::u16string_view url);
+    bool activateEntry(std::u16string_view url);
+
+    Reference< ucb::XSimpleFileAccess3 > const & getFileAccess();
+    Reference< ucb::XSimpleFileAccess3 > m_xSFA;
+
+    const Reference<deployment::XPackageTypeInfo> m_xHelpTypeInfo;
+    Sequence< Reference<deployment::XPackageTypeInfo> > m_typeInfos;
+    std::unique_ptr<HelpBackendDb> m_backendDb;
+
+public:
+    BackendImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+        getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+};
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : PackageRegistryBackend( args, xComponentContext ),
+      m_xHelpTypeInfo( new Package::TypeInfo("application/vnd.sun.star.help",
+                               OUString(),
+                               DpResId(RID_STR_HELP)
+                               ) ),
+      m_typeInfos{ m_xHelpTypeInfo }
+{
+    if (transientMode())
+        return;
+
+    OUString dbFile = makeURL(getCachePath(), "backenddb.xml");
+    m_backendDb.reset(
+        new HelpBackendDb(getComponentContext(), dbFile));
+
+    //clean up data folders which are no longer used.
+    //This must not be done in the same process where the help files
+    //are still registers. Only after revoking and restarting OOo the folders
+    //can be removed. This works now, because the extension manager is a singleton
+    //and the backends are only create once per process.
+    std::vector<OUString> folders = m_backendDb->getAllDataUrls();
+    deleteUnusedFolders(folders);
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.help.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return m_typeInfos;
+}
+
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_,
+    bool bRemoved, OUString const & identifier,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    // we don't support auto detection:
+    if (mediaType_.isEmpty())
+        throw lang::IllegalArgumentException(
+            StrCannotDetectMediaType() + url,
+            static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType_, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            OUString name;
+            if (!bRemoved)
+            {
+                ::ucbhelper::Content ucbContent(
+                    url, xCmdEnv, getComponentContext() );
+                name = StrTitle::getTitle( ucbContent );
+            }
+
+            if (subType.equalsIgnoreAsciiCase( "vnd.sun.star.help"))
+            {
+                return new PackageImpl(
+                    this, url, name, m_xHelpTypeInfo, bRemoved,
+                    identifier);
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType_,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+::std::optional<HelpBackendDb::Data> BackendImpl::readDataFromDb(
+    std::u16string_view url)
+{
+    ::std::optional<HelpBackendDb::Data> data;
+    if (m_backendDb)
+        data = m_backendDb->getEntry(url);
+    return data;
+}
+
+bool BackendImpl::hasActiveEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->hasActiveEntry(url);
+    return false;
+}
+
+bool BackendImpl::activateEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->activateEntry(url);
+    return false;
+}
+
+
+BackendImpl::PackageImpl::PackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url, OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    bool bRemoved, OUString const & identifier)
+    : Package( myBackend, url, name, name, xPackageType, bRemoved,
+               identifier)
+{
+}
+
+// Package
+BackendImpl * BackendImpl::PackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException("Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<PackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+bool BackendImpl::PackageImpl::extensionContainsCompiledHelp()
+{
+    bool bCompiled = true;
+    OUString aExpandedHelpURL = dp_misc::expandUnoRcUrl(getURL());
+
+    ::osl::Directory helpFolder(aExpandedHelpURL);
+    if ( helpFolder.open() == ::osl::File::E_None)
+    {
+        //iterate over the contents of the help folder
+        //We assume that all folders within the help folder contain language specific
+        //help files. If just one of them does not contain compiled help then this
+        //function returns false.
+        ::osl::DirectoryItem item;
+        ::osl::File::RC errorNext = ::osl::File::E_None;
+        while ((errorNext = helpFolder.getNextItem(item)) == ::osl::File::E_None)
+        {
+            //No find the language folders
+            ::osl::FileStatus stat(osl_FileStatus_Mask_Type | osl_FileStatus_Mask_FileName |osl_FileStatus_Mask_FileURL);
+            if (item.getFileStatus(stat) == ::osl::File::E_None)
+            {
+                if (stat.getFileType() != ::osl::FileStatus::Directory)
+                    continue;
+
+                //look if there is the folder help.idxl in the language folder
+                OUString compUrl(stat.getFileURL() + "/help.idxl");
+                ::osl::Directory compiledFolder(compUrl);
+                if (compiledFolder.open() != ::osl::File::E_None)
+                {
+                    bCompiled = false;
+                    break;
+                }
+            }
+            else
+            {
+                //Error
+                OSL_ASSERT(false);
+                bCompiled = false;
+                break;
+            }
+        }
+        if (errorNext != ::osl::File::E_NOENT
+            && errorNext != ::osl::File::E_None)
+        {
+            //Error
+            OSL_ASSERT(false);
+            bCompiled = false;
+        }
+    }
+    return bCompiled;
+}
+
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::PackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    BackendImpl * that = getMyBackend();
+
+    bool bReg = false;
+    if (that->hasActiveEntry(getURL()))
+        bReg = true;
+
+    return beans::Optional< beans::Ambiguous<sal_Bool> >( true, beans::Ambiguous<sal_Bool>( bReg, false ) );
+}
+
+
+void BackendImpl::PackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool /* startup */,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    BackendImpl* that = getMyBackend();
+    that->implProcessHelp( this, doRegisterPackage, xCmdEnv);
+}
+
+beans::Optional< OUString > BackendImpl::PackageImpl::getRegistrationDataURL()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    ::std::optional<HelpBackendDb::Data> data =
+          getMyBackend()->readDataFromDb(getURL());
+
+    if (data && getMyBackend()->hasActiveEntry(getURL()))
+        return beans::Optional<OUString>(true, data->dataUrl);
+
+    return beans::Optional<OUString>(true, OUString());
+}
+
+void BackendImpl::implProcessHelp(
+    PackageImpl * package, bool doRegisterPackage,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    Reference< deployment::XPackage > xPackage(package);
+    OSL_ASSERT(xPackage.is());
+    if (doRegisterPackage)
+    {
+        //revive already processed help if possible
+        if ( !activateEntry(xPackage->getURL()))
+        {
+            HelpBackendDb::Data data;
+            data.dataUrl = xPackage->getURL();
+            if (!package->extensionContainsCompiledHelp())
+            {
+#if HAVE_FEATURE_XMLHELP
+                const OUString sHelpFolder = createFolder(xCmdEnv);
+                data.dataUrl = sHelpFolder;
+
+                Reference< ucb::XSimpleFileAccess3 > xSFA = getFileAccess();
+                OUString aHelpURL = xPackage->getURL();
+                OUString aExpandedHelpURL = dp_misc::expandUnoRcUrl( aHelpURL );
+                if( !xSFA->isFolder( aExpandedHelpURL ) )
+                {
+                    OUString aErrStr = DpResId( RID_STR_HELPPROCESSING_GENERAL_ERROR ) +
+                        "No help folder";
+                    OWeakObject* oWeakThis = this;
+                    throw deployment::DeploymentException( OUString(), oWeakThis,
+                                                           Any( uno::Exception( aErrStr, oWeakThis ) ) );
+                }
+
+                // Scan languages
+                Sequence< OUString > aLanguageFolderSeq = xSFA->getFolderContents( aExpandedHelpURL, true );
+                sal_Int32 nLangCount = aLanguageFolderSeq.getLength();
+                const OUString* pSeq = aLanguageFolderSeq.getConstArray();
+                for( sal_Int32 iLang = 0 ; iLang < nLangCount ; ++iLang )
+                {
+                    OUString aLangURL = pSeq[iLang];
+                    if( xSFA->isFolder( aLangURL ) )
+                    {
+                        std::vector< OUString > aXhpFileVector;
+
+                        // calculate jar file URL
+                        sal_Int32 indexStartSegment = aLangURL.lastIndexOf('/');
+                        // for example "/en"
+                        OUString langFolderURLSegment(
+                            aLangURL.copy(
+                                indexStartSegment + 1, aLangURL.getLength() - indexStartSegment - 1));
+
+                        //create the folder in the "temporary folder"
+                        ::ucbhelper::Content langFolderContent;
+                        const OUString langFolderDest = makeURL(sHelpFolder, langFolderURLSegment);
+                        const OUString langFolderDestExpanded = ::dp_misc::expandUnoRcUrl(langFolderDest);
+                        ::dp_misc::create_folder(
+                            &langFolderContent,
+                            langFolderDest, xCmdEnv);
+
+                        static const OUStringLiteral aHelpStr(u"help");
+
+                        OUString aJarFile(
+                            makeURL(sHelpFolder, langFolderURLSegment + "/" + aHelpStr + ".jar"));
+                        aJarFile = ::dp_misc::expandUnoRcUrl(aJarFile);
+
+                        OUString aEncodedJarFilePath = rtl::Uri::encode(
+                            aJarFile, rtl_UriCharClassPchar,
+                            rtl_UriEncodeIgnoreEscapes,
+                            RTL_TEXTENCODING_UTF8 );
+                        OUString aDestBasePath = "vnd.sun.star.zip://" +
+                            aEncodedJarFilePath + "/" ;
+
+                        sal_Int32 nLenLangFolderURL = aLangURL.getLength() + 1;
+
+                        Sequence< OUString > aSubLangSeq = xSFA->getFolderContents( aLangURL, true );
+                        sal_Int32 nSubLangCount = aSubLangSeq.getLength();
+                        const OUString* pSubLangSeq = aSubLangSeq.getConstArray();
+                        for( sal_Int32 iSubLang = 0 ; iSubLang < nSubLangCount ; ++iSubLang )
+                        {
+                            OUString aSubFolderURL = pSubLangSeq[iSubLang];
+                            if( !xSFA->isFolder( aSubFolderURL ) )
+                                continue;
+
+                            implCollectXhpFiles( aSubFolderURL, aXhpFileVector );
+
+                            // Copy to package (later: move?)
+                            std::u16string_view aPureFolderName = aSubFolderURL.subView( nLenLangFolderURL );
+                            OUString aDestPath = aDestBasePath + aPureFolderName;
+                            xSFA->copy( aSubFolderURL, aDestPath );
+                        }
+
+                        // Call compiler
+                        sal_Int32 nXhpFileCount = aXhpFileVector.size();
+                        std::unique_ptr<OUString[]> pXhpFiles(new OUString[nXhpFileCount]);
+                        for( sal_Int32 iXhp = 0 ; iXhp < nXhpFileCount ; ++iXhp )
+                        {
+                            OUString aXhpFile = aXhpFileVector[iXhp];
+                            OUString aXhpRelFile = aXhpFile.copy( nLenLangFolderURL );
+                            pXhpFiles[iXhp] = aXhpRelFile;
+                        }
+
+                        OUString aOfficeHelpPath( SvtPathOptions().GetHelpPath() );
+                        OUString aOfficeHelpPathFileURL;
+                        ::osl::File::getFileURLFromSystemPath( aOfficeHelpPath, aOfficeHelpPathFileURL );
+
+                        HelpProcessingErrorInfo aErrorInfo;
+                        bool bSuccess = compileExtensionHelp(
+                            aOfficeHelpPathFileURL, aHelpStr, aLangURL,
+                            nXhpFileCount, pXhpFiles.get(),
+                            langFolderDestExpanded, aErrorInfo );
+
+                        pXhpFiles.reset();
+
+                        if( bSuccess )
+                        {
+                            OUString aLang;
+                            sal_Int32 nLastSlash = aLangURL.lastIndexOf( '/' );
+                            if( nLastSlash != -1 )
+                                aLang = aLangURL.copy( nLastSlash + 1 );
+                            else
+                                aLang = "en";
+
+                            HelpIndexer aIndexer(aLang, "help", langFolderDestExpanded, langFolderDestExpanded);
+                            aIndexer.indexDocuments();
+                        }
+
+                        if( !bSuccess )
+                        {
+                            TranslateId pErrStrId;
+                            switch( aErrorInfo.m_eErrorClass )
+                            {
+                            case HelpProcessingErrorClass::General:      pErrStrId = RID_STR_HELPPROCESSING_GENERAL_ERROR; break;
+                            case HelpProcessingErrorClass::XmlParsing:   pErrStrId = RID_STR_HELPPROCESSING_XMLPARSING_ERROR; break;
+                            default: ;
+                            };
+
+                            OUString aErrStr;
+                            if (pErrStrId)
+                            {
+                                aErrStr = DpResId(pErrStrId);
+
+                                // Remove CR/LF
+                                OUString aErrMsg( aErrorInfo.m_aErrorMsg );
+                                sal_Unicode const nCR = 13, nLF = 10;
+                                sal_Int32 nSearchCR = aErrMsg.indexOf( nCR );
+                                sal_Int32 nSearchLF = aErrMsg.indexOf( nLF );
+                                if( nSearchCR != -1 || nSearchLF != -1 )
+                                {
+                                    sal_Int32 nCopy;
+                                    if( nSearchCR == -1 )
+                                        nCopy = nSearchLF;
+                                    else if( nSearchLF == -1 )
+                                        nCopy = nSearchCR;
+                                    else
+                                        nCopy = ( nSearchCR < nSearchLF ) ? nSearchCR : nSearchLF;
+
+                                    aErrMsg = aErrMsg.copy( 0, nCopy );
+                                }
+                                aErrStr += aErrMsg;
+                                if (pErrStrId != RID_STR_HELPPROCESSING_XMLPARSING_ERROR && !aErrorInfo.m_aXMLParsingFile.isEmpty() )
+                                {
+                                    aErrStr += " in ";
+
+                                    OUString aDecodedFile = rtl::Uri::decode( aErrorInfo.m_aXMLParsingFile,
+                                                                                   rtl_UriDecodeWithCharset, RTL_TEXTENCODING_UTF8 );
+                                    aErrStr += aDecodedFile;
+                                    if( aErrorInfo.m_nXMLParsingLine != -1 )
+                                    {
+                                        aErrStr += ", line " +
+                                            OUString::number( aErrorInfo.m_nXMLParsingLine );
+                                    }
+                                }
+                            }
+
+                            OWeakObject* oWeakThis = this;
+                            throw deployment::DeploymentException( OUString(), oWeakThis,
+                                                                   Any( uno::Exception( aErrStr, oWeakThis ) ) );
+                        }
+                    }
+                }
+#else
+                (void) xCmdEnv;
+#endif
+            }
+            // Writing the data entry replaces writing the flag file. If we got to this
+            // point the registration was successful.
+            if (m_backendDb)
+                m_backendDb->addEntry(xPackage->getURL(), data);
+        }
+    } //if (doRegisterPackage)
+    else
+    {
+        if (m_backendDb)
+            m_backendDb->revokeEntry(xPackage->getURL());
+    }
+}
+
+void BackendImpl::implCollectXhpFiles( const OUString& aDir,
+    std::vector< OUString >& o_rXhpFileVector )
+{
+    Reference< ucb::XSimpleFileAccess3 > xSFA = getFileAccess();
+
+    // Scan xhp files recursively
+    Sequence< OUString > aSeq = xSFA->getFolderContents( aDir, true );
+    sal_Int32 nCount = aSeq.getLength();
+    const OUString* pSeq = aSeq.getConstArray();
+    for( sal_Int32 i = 0 ; i < nCount ; ++i )
+    {
+        OUString aURL = pSeq[i];
+        if( xSFA->isFolder( aURL ) )
+        {
+            implCollectXhpFiles( aURL, o_rXhpFileVector );
+        }
+        else
+        {
+            sal_Int32 nLastDot = aURL.lastIndexOf( '.' );
+            if( nLastDot != -1 )
+            {
+                std::u16string_view aExt = aURL.subView( nLastDot + 1 );
+                if( o3tl::equalsIgnoreAsciiCase( aExt, u"xhp" ) )
+                    o_rXhpFileVector.push_back( aURL );
+            }
+        }
+    }
+}
+
+Reference< ucb::XSimpleFileAccess3 > const & BackendImpl::getFileAccess()
+{
+    if( !m_xSFA.is() )
+    {
+        Reference<XComponentContext> const & xContext = getComponentContext();
+        if( xContext.is() )
+        {
+            m_xSFA = ucb::SimpleFileAccess::create(xContext);
+        }
+        if( !m_xSFA.is() )
+        {
+            throw RuntimeException(
+                "dp_registry::backend::help::BackendImpl::getFileAccess(), "
+                "could not instantiate SimpleFileAccess."  );
+        }
+    }
+    return m_xSFA;
+}
+
+} // anon namespace
+
+} // namespace dp_registry
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_help_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::help::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/help/dp_helpbackenddb.cxx b/desktop/source/deployment/registry/help/dp_helpbackenddb.cxx
new file mode 100644
index 000000000..19bb3c3ce
--- /dev/null
+++ b/desktop/source/deployment/registry/help/dp_helpbackenddb.cxx
@@ -0,0 +1,126 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include "dp_helpbackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/help-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"help";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"help-backend-db";
+constexpr OUStringLiteral KEY_ELEMENT_NAME = u"help";
+
+namespace dp_registry::backend::help {
+
+HelpBackendDb::HelpBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):BackendDb(xContext, url)
+{
+
+}
+
+OUString HelpBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString HelpBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString HelpBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString HelpBackendDb::getKeyElementName()
+{
+    return KEY_ELEMENT_NAME;
+}
+
+
+void HelpBackendDb::addEntry(OUString const & url, Data const & data)
+{
+    try{
+        if (!activateEntry(url))
+        {
+            Reference<css::xml::dom::XNode> helpNode
+                = writeKeyElement(url);
+
+            writeSimpleElement(u"data-url", data.dataUrl, helpNode);
+            save();
+        }
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in help backend db: " + m_urlDb, nullptr, exc);
+    }
+}
+
+
+::std::optional<HelpBackendDb::Data>
+HelpBackendDb::getEntry(std::u16string_view url)
+{
+    try
+    {
+        HelpBackendDb::Data retData;
+        Reference<css::xml::dom::XNode> aNode = getKeyElement(url);
+        if (aNode.is())
+        {
+            retData.dataUrl = readSimpleElement(u"data-url", aNode);
+        }
+        else
+        {
+            return ::std::optional<Data>();
+        }
+        return ::std::optional<Data>(retData);
+    }
+    catch ( const css::deployment::DeploymentException& )
+    {
+        throw;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in help backend db: " + m_urlDb, nullptr, exc);
+    }
+}
+
+std::vector<OUString> HelpBackendDb::getAllDataUrls()
+{
+    return getOneChildFromAllEntries(u"data-url");
+}
+
+} // namespace dp_registry::backend::help
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/help/dp_helpbackenddb.hxx b/desktop/source/deployment/registry/help/dp_helpbackenddb.hxx
new file mode 100644
index 000000000..a46bd8663
--- /dev/null
+++ b/desktop/source/deployment/registry/help/dp_helpbackenddb.hxx
@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <optional>
+#include <string_view>
+
+#include <dp_backenddb.hxx>
+
+namespace com::sun::star::uno
+{
+class XComponentContext;
+}
+
+namespace dp_registry::backend::help
+{
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+ */
+class HelpBackendDb : public dp_registry::backend::BackendDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+
+    virtual OUString getNSPrefix() override;
+
+    virtual OUString getRootElementName() override;
+
+    virtual OUString getKeyElementName() override;
+
+public:
+    struct Data
+    {
+        /* the URL to the folder containing the compiled help files, etc.
+         */
+        OUString dataUrl;
+    };
+
+public:
+    HelpBackendDb(css::uno::Reference<css::uno::XComponentContext> const& xContext,
+                  OUString const& url);
+
+    void addEntry(OUString const& url, Data const& data);
+
+    ::std::optional<Data> getEntry(std::u16string_view url);
+    //must also return the data urls for entries with @active="false". That is,
+    //those are currently revoked.
+    std::vector<OUString> getAllDataUrls();
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/inc/dp_backend.h b/desktop/source/deployment/registry/inc/dp_backend.h
new file mode 100644
index 000000000..0fe39db45
--- /dev/null
+++ b/desktop/source/deployment/registry/inc/dp_backend.h
@@ -0,0 +1,287 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <dp_shared.hxx>
+#include <dp_interact.h>
+#include <rtl/ref.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <com/sun/star/lang/XEventListener.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/deployment/XPackageRegistry.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <unordered_map>
+#include <strings.hrc>
+#include <utility>
+
+namespace dp_registry::backend
+{
+
+class PackageRegistryBackend;
+
+inline constexpr OUStringLiteral BACKEND_SERVICE_NAME  = u"com.sun.star.deployment.PackageRegistryBackend";
+
+typedef ::cppu::WeakComponentImplHelper<
+    css::deployment::XPackage > t_PackageBase;
+
+
+class Package : protected cppu::BaseMutex, public t_PackageBase
+{
+    PackageRegistryBackend * getMyBackend() const;
+    void processPackage_impl(
+        bool registerPackage,
+        bool startup,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv );
+
+protected:
+    ::rtl::Reference<PackageRegistryBackend> m_myBackend;
+    const OUString m_url;
+    OUString m_name;
+    OUString m_displayName;
+    const css::uno::Reference<css::deployment::XPackageTypeInfo> m_xPackageType;
+    const bool m_bRemoved;
+    //Only set if m_bRemoved = true;
+    const OUString m_identifier;
+
+    void check() const;
+    void fireModified();
+    virtual void SAL_CALL disposing() override;
+
+    void checkAborted(
+        ::rtl::Reference< ::dp_misc::AbortChannel > const & abortChannel );
+
+    // @@@ to be implemented by specific backend:
+    virtual css::beans::Optional< css::beans::Ambiguous<sal_Bool> >
+    isRegistered_(
+        ::osl::ResettableMutexGuard & guard,
+        ::rtl::Reference< ::dp_misc::AbortChannel > const & abortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv )
+        = 0;
+    virtual void processPackage_(
+        ::osl::ResettableMutexGuard & guard,
+        bool registerPackage,
+        bool startup,
+        ::rtl::Reference< ::dp_misc::AbortChannel > const & abortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv )
+        = 0;
+
+    virtual ~Package() override;
+    Package( ::rtl::Reference<PackageRegistryBackend> myBackend,
+             OUString url,
+             OUString name,
+             OUString displayName,
+             css::uno::Reference<css::deployment::XPackageTypeInfo> const & xPackageType,
+             bool bRemoved,
+             OUString identifier);
+
+public:
+
+    class TypeInfo :
+        public ::cppu::WeakImplHelper<css::deployment::XPackageTypeInfo>
+    {
+        const OUString m_mediaType;
+        const OUString m_fileFilter;
+        const OUString m_shortDescr;
+    public:
+        virtual ~TypeInfo() override;
+        TypeInfo( OUString mediaType,
+                  OUString fileFilter,
+                  OUString shortDescr )
+            : m_mediaType(std::move(mediaType)), m_fileFilter(std::move(fileFilter)),
+              m_shortDescr(std::move(shortDescr))
+            {}
+        // XPackageTypeInfo
+        virtual OUString SAL_CALL getMediaType() override;
+        virtual OUString SAL_CALL getDescription() override;
+        virtual OUString SAL_CALL getShortDescription() override;
+        virtual OUString SAL_CALL getFileFilter() override;
+        virtual css::uno::Any SAL_CALL getIcon( sal_Bool highContrast,
+                                                sal_Bool smallIcon ) override;
+    };
+
+    // XComponent
+    virtual void SAL_CALL dispose() override;
+    virtual void SAL_CALL addEventListener(
+        css::uno::Reference<css::lang::XEventListener> const & xListener ) override;
+    virtual void SAL_CALL removeEventListener(
+        css::uno::Reference<css::lang::XEventListener> const & xListener ) override;
+
+    // XModifyBroadcaster
+    virtual void SAL_CALL addModifyListener(
+        css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+    virtual void SAL_CALL removeModifyListener(
+        css::uno::Reference<css::util::XModifyListener> const & xListener ) override;
+
+    // XPackage
+    virtual css::uno::Reference<css::task::XAbortChannel> SAL_CALL
+    createAbortChannel() override;
+    virtual css::beans::Optional< css::beans::Ambiguous<sal_Bool> >
+    SAL_CALL isRegistered(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual ::sal_Int32 SAL_CALL checkPrerequisites(
+        const css::uno::Reference< css::task::XAbortChannel >& xAbortChannel,
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv,
+        sal_Bool noLicenseChecking) override;
+
+    virtual ::sal_Bool SAL_CALL checkDependencies(
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv ) override;
+
+    virtual void SAL_CALL registerPackage(
+        sal_Bool startup,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+    virtual void SAL_CALL revokePackage(
+        sal_Bool startup,
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+    virtual sal_Bool SAL_CALL isBundle() override;
+    virtual css::uno::Sequence< css::uno::Reference<css::deployment::XPackage> >
+    SAL_CALL getBundle(
+        css::uno::Reference<css::task::XAbortChannel> const & xAbortChannel,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+    virtual OUString SAL_CALL getName() override;
+    virtual css::beans::Optional< OUString > SAL_CALL getIdentifier() override;
+    virtual OUString SAL_CALL getVersion() override;
+    virtual OUString SAL_CALL getURL() override;
+    virtual OUString SAL_CALL getDisplayName() override;
+    virtual OUString SAL_CALL getDescription() override;
+    virtual OUString SAL_CALL getLicenseText() override;
+    virtual css::uno::Sequence< OUString > SAL_CALL
+    getUpdateInformationURLs() override;
+    virtual css::beans::StringPair SAL_CALL getPublisherInfo() override;
+    virtual css::uno::Reference< css::graphic::XGraphic > SAL_CALL
+    getIcon( sal_Bool bHighContrast ) override;
+    virtual css::uno::Reference<css::deployment::XPackageTypeInfo> SAL_CALL
+    getPackageType() override;
+    virtual void SAL_CALL exportTo(
+        OUString const & destFolderURL,
+        OUString const & newTitle,
+        sal_Int32 nameClashAction,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+    virtual OUString SAL_CALL getRepositoryName() override;
+    virtual css::beans::Optional< OUString > SAL_CALL getRegistrationDataURL() override;
+    virtual sal_Bool SAL_CALL isRemoved() override;
+
+};
+
+typedef ::cppu::WeakComponentImplHelper<
+    css::lang::XEventListener,
+    css::deployment::XPackageRegistry,
+    css::lang::XServiceInfo > t_BackendBase;
+
+
+class PackageRegistryBackend
+    : protected cppu::BaseMutex, public t_BackendBase
+{
+    //The map held originally WeakReferences. The map entries are removed in the disposing
+    //function, which is called when the XPackages are destructed or they are
+    //explicitly disposed. The latter happens, for example, when an extension is
+    //removed (see dp_manager.cxx). However, because of how the help systems work, now
+    // XPackageManager::getDeployedPackages is called often. This results in a lot
+    //of bindPackage calls which are costly. Therefore we keep hard references in
+    //the map now.
+    typedef std::unordered_map<
+        OUString, css::uno::Reference<css::deployment::XPackage> > t_string2ref;
+    t_string2ref m_bound;
+
+protected:
+    OUString m_cachePath;
+    css::uno::Reference<css::uno::XComponentContext> m_xComponentContext;
+
+    OUString m_context;
+    // currently only for library containers:
+    enum class Context {
+        Unknown, User, Shared, Bundled, Tmp, Document
+    } m_eContext;
+
+    static OUString StrCannotDetectMediaType() { return DpResId(RID_STR_CANNOT_DETECT_MEDIA_TYPE); }
+    static OUString StrUnsupportedMediaType() { return DpResId(RID_STR_UNSUPPORTED_MEDIA_TYPE); }
+
+    // @@@ to be implemented by specific backend:
+    virtual css::uno::Reference<css::deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv )
+        = 0;
+
+    void check();
+    virtual void SAL_CALL disposing() override;
+
+    virtual ~PackageRegistryBackend() override;
+    PackageRegistryBackend(
+        css::uno::Sequence<css::uno::Any> const & args,
+        css::uno::Reference<css::uno::XComponentContext> const & xContext );
+
+    /* creates a folder with a unique name.
+       If url is empty then it is created in the backend folder, otherwise
+       at a location relative to that folder specified by url.
+    */
+    OUString createFolder(
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv);
+    /* deletes folders and files.
+
+       All folder all files which end with ".tmp" or ".tmp_" and which are
+       not used are deleted.
+     */
+    void deleteUnusedFolders(
+        std::vector< OUString> const & usedFolders);
+    /* deletes one folder with a "temporary" name and the corresponding
+       tmp file, which was used to derive the folder name.
+    */
+    static void deleteTempFolder(
+        OUString const & folderUrl);
+
+public:
+    static OUString StrRegisteringPackage() { return DpResId(RID_STR_REGISTERING_PACKAGE); }
+    static OUString StrRevokingPackage() { return DpResId(RID_STR_REVOKING_PACKAGE); }
+
+    css::uno::Reference<css::uno::XComponentContext> const &
+    getComponentContext() const { return m_xComponentContext; }
+
+    OUString const & getCachePath() const { return m_cachePath; }
+    bool transientMode() const { return m_cachePath.isEmpty(); }
+
+    const OUString& getContext() const {return m_context; }
+
+    // XEventListener
+    virtual void SAL_CALL disposing( css::lang::EventObject const & evt ) override;
+
+    // XPackageRegistry
+    virtual css::uno::Reference<css::deployment::XPackage> SAL_CALL bindPackage(
+        OUString const & url, OUString const & mediaType,
+        sal_Bool bRemoved, OUString const & identifier,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+//     virtual void SAL_CALL packageRemoved(
+//         OUString const & url, OUString const & mediaType)
+//         throw (css::deployment::DeploymentException,
+//                css::uno::RuntimeException);
+
+};
+
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/inc/dp_backenddb.hxx b/desktop/source/deployment/registry/inc/dp_backenddb.hxx
new file mode 100644
index 000000000..785201466
--- /dev/null
+++ b/desktop/source/deployment/registry/inc/dp_backenddb.hxx
@@ -0,0 +1,165 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <rtl/ustring.hxx>
+#include <deque>
+#include <string_view>
+#include <vector>
+
+namespace com::sun::star {
+        namespace uno {
+            class XComponentContext;
+        }
+        namespace xml::dom {
+            class XDocument;
+            class XNode;
+        }
+        namespace xml::xpath {
+            class XXPathAPI;
+        }
+}
+
+namespace dp_registry::backend {
+
+class BackendDb
+{
+private:
+
+    css::uno::Reference<css::xml::dom::XDocument> m_doc;
+    css::uno::Reference<css::xml::xpath::XXPathAPI> m_xpathApi;
+
+    BackendDb(BackendDb const &) = delete;
+    BackendDb &  operator = (BackendDb const &) = delete;
+
+protected:
+    const css::uno::Reference<css::uno::XComponentContext> m_xContext;
+    OUString m_urlDb;
+
+protected:
+
+    /* caller must make sure that only one thread accesses the function
+     */
+    css::uno::Reference<css::xml::dom::XDocument> const & getDocument();
+
+    /* the namespace prefix is "reg" (without quotes)
+     */
+    css::uno::Reference<css::xml::xpath::XXPathAPI> const & getXPathAPI();
+    void save();
+    void removeElement(OUString const & sXPathExpression);
+
+    css::uno::Reference<css::xml::dom::XNode> getKeyElement(
+        std::u16string_view url);
+
+    void writeSimpleList(
+        std::deque< OUString> const & list,
+        std::u16string_view sListTagName,
+        std::u16string_view sMemberTagName,
+        css::uno::Reference<css::xml::dom::XNode> const & xParent);
+
+    void writeVectorOfPair(
+        std::vector< std::pair< OUString, OUString > > const & vecPairs,
+        std::u16string_view sVectorTagName,
+        std::u16string_view sPairTagName,
+        std::u16string_view sFirstTagName,
+        std::u16string_view sSecondTagName,
+        css::uno::Reference<css::xml::dom::XNode> const & xParent);
+
+    void writeSimpleElement(
+        std::u16string_view sElementName, OUString const & value,
+        css::uno::Reference<css::xml::dom::XNode> const & xParent);
+
+    css::uno::Reference<css::xml::dom::XNode> writeKeyElement(
+        OUString const & url);
+
+    OUString readSimpleElement(
+        std::u16string_view sElementName,
+        css::uno::Reference<css::xml::dom::XNode> const & xParent);
+
+    std::vector< std::pair< OUString, OUString > >
+    readVectorOfPair(
+        css::uno::Reference<css::xml::dom::XNode> const & parent,
+        std::u16string_view sListTagName,
+        std::u16string_view sPairTagName,
+        std::u16string_view sFirstTagName,
+        std::u16string_view sSecondTagName);
+
+    std::deque< OUString> readList(
+        css::uno::Reference<css::xml::dom::XNode> const & parent,
+        std::u16string_view sListTagName,
+        std::u16string_view sMemberTagName);
+
+    /* returns the values of one particularly child element of all key elements.
+     */
+    std::vector< OUString> getOneChildFromAllEntries(
+        std::u16string_view sElementName);
+
+
+    /*  returns the namespace which is to be written as xmlns attribute
+        into the root element.
+     */
+    virtual OUString getDbNSName()=0;
+    /* return the namespace prefix which is to be registered with the XPath API.
+
+       The prefix can then be used in XPath expressions.
+    */
+    virtual OUString getNSPrefix()=0;
+    /* returns the name of the root element without any namespace prefix.
+     */
+    virtual OUString getRootElementName()=0;
+    /* returns the name of xml element for each entry
+     */
+    virtual OUString getKeyElementName()=0;
+
+public:
+    BackendDb(css::uno::Reference<css::uno::XComponentContext> const &  xContext,
+              OUString const & url);
+    virtual ~BackendDb() {};
+
+    void removeEntry(std::u16string_view url);
+
+    /* This is called to write the "revoked" attribute to the entry.
+       This is done when XPackage::revokePackage is called.
+    */
+    void revokeEntry(std::u16string_view url);
+
+    /* returns false if the entry does not exist yet.
+     */
+    bool activateEntry(std::u16string_view url);
+
+    bool hasActiveEntry(std::u16string_view url);
+
+};
+
+class RegisteredDb: public BackendDb
+{
+
+public:
+    RegisteredDb( css::uno::Reference<css::uno::XComponentContext> const &  xContext,
+                  OUString const & url);
+
+
+    void addEntry(OUString const & url);
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/package/dp_extbackenddb.cxx b/desktop/source/deployment/registry/package/dp_extbackenddb.cxx
new file mode 100644
index 000000000..8e656c5d7
--- /dev/null
+++ b/desktop/source/deployment/registry/package/dp_extbackenddb.cxx
@@ -0,0 +1,111 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include "dp_extbackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/extension-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"ext";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"extension-backend-db";
+constexpr OUStringLiteral KEY_ELEMENT_NAME = u"extension";
+
+namespace dp_registry::backend::bundle {
+
+ExtensionBackendDb::ExtensionBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):BackendDb(xContext, url)
+{
+
+}
+
+OUString ExtensionBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString ExtensionBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString ExtensionBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString ExtensionBackendDb::getKeyElementName()
+{
+    return KEY_ELEMENT_NAME;
+}
+
+void ExtensionBackendDb::addEntry(OUString const & url, Data const & data)
+{
+    try{
+        //reactive revoked entry if possible.
+        if (!activateEntry(url))
+        {
+            Reference<css::xml::dom::XNode> extensionNodeNode = writeKeyElement(url);
+            writeVectorOfPair( data.items, u"extension-items", u"item",
+                u"url", u"media-type", extensionNodeNode);
+            save();
+        }
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to write data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+ExtensionBackendDb::Data ExtensionBackendDb::getEntry(std::u16string_view url)
+{
+    try
+    {
+        ExtensionBackendDb::Data retData;
+        Reference<css::xml::dom::XNode> aNode = getKeyElement(url);
+
+        if (aNode.is())
+        {
+            retData.items =
+                readVectorOfPair( aNode, u"extension-items", u"item",
+                    u"url", u"media-type");
+        }
+        return retData;
+    }
+    catch(const css::uno::Exception &)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+            "Extension Manager: failed to read data entry in backend db: " +
+            m_urlDb, nullptr, exc);
+    }
+}
+
+} // namespace dp_registry::backend::bundle
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/package/dp_extbackenddb.hxx b/desktop/source/deployment/registry/package/dp_extbackenddb.hxx
new file mode 100644
index 000000000..fb736e6e2
--- /dev/null
+++ b/desktop/source/deployment/registry/package/dp_extbackenddb.hxx
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <string_view>
+#include <utility>
+#include <vector>
+
+#include <rtl/ustring.hxx>
+
+#include <dp_backenddb.hxx>
+
+namespace com::sun::star::uno
+{
+class XComponentContext;
+}
+
+namespace dp_registry::backend::bundle
+{
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+ */
+class ExtensionBackendDb : public dp_registry::backend::BackendDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+    virtual OUString getNSPrefix() override;
+    virtual OUString getRootElementName() override;
+    virtual OUString getKeyElementName() override;
+
+public:
+    struct Data
+    {
+        /* every element consists of a pair of the url to the item (jar,rdb, etc)
+           and the media type
+         */
+        std::vector<std::pair<OUString, OUString>> items;
+    };
+
+public:
+    ExtensionBackendDb(css::uno::Reference<css::uno::XComponentContext> const& xContext,
+                       OUString const& url);
+
+    void addEntry(OUString const& url, Data const& data);
+
+    Data getEntry(std::u16string_view url);
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/package/dp_package.cxx b/desktop/source/deployment/registry/package/dp_package.cxx
new file mode 100644
index 000000000..36b761b54
--- /dev/null
+++ b/desktop/source/deployment/registry/package/dp_package.cxx
@@ -0,0 +1,1594 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <strings.hrc>
+#include <dp_package.hxx>
+#include <dp_backend.h>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <dp_interact.h>
+#include <dp_dependencies.hxx>
+#include <dp_platform.hxx>
+#include <dp_descriptioninfoset.hxx>
+#include <dp_identifier.hxx>
+#include <dp_resource.h>
+#include <rtl/uri.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <sal/log.hxx>
+#include <o3tl/string_view.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <ucbhelper/content.hxx>
+#include <svl/inettype.hxx>
+#include <comphelper/propertyvalue.hxx>
+#include <comphelper/sequence.hxx>
+#include <com/sun/star/lang/WrappedTargetException.hpp>
+#include <com/sun/star/graphic/XGraphic.hpp>
+#include <com/sun/star/graphic/GraphicProvider.hpp>
+#include <com/sun/star/graphic/XGraphicProvider.hpp>
+#include <com/sun/star/io/Pipe.hpp>
+#include <com/sun/star/io/XOutputStream.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/task/InteractionClassification.hpp>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <com/sun/star/ucb/XInteractionReplaceExistingData.hpp>
+#include <com/sun/star/ucb/NameClashResolveRequest.hpp>
+#include <com/sun/star/ucb/XContentAccess.hpp>
+#include <com/sun/star/ucb/NameClash.hpp>
+#include <com/sun/star/ucb/UnsupportedCommandException.hpp>
+#include <com/sun/star/sdbc/XResultSet.hpp>
+#include <com/sun/star/sdbc/XRow.hpp>
+#include <com/sun/star/packages/manifest/ManifestReader.hpp>
+#include <com/sun/star/packages/manifest/ManifestWriter.hpp>
+#include <com/sun/star/deployment/DependencyException.hpp>
+#include <com/sun/star/deployment/DeploymentException.hpp>
+#include <com/sun/star/deployment/ExtensionRemovedException.hpp>
+#include <com/sun/star/deployment/LicenseException.hpp>
+#include <com/sun/star/deployment/PlatformException.hpp>
+#include <com/sun/star/deployment/Prerequisites.hpp>
+#include <optional>
+#include <tools/diagnose_ex.h>
+
+#include <algorithm>
+#include <memory>
+#include <string_view>
+#include <utility>
+#include <vector>
+
+#include "dp_extbackenddb.hxx"
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+
+namespace dp_registry::backend::bundle {
+namespace {
+
+typedef cppu::ImplInheritanceHelper<PackageRegistryBackend> ImplBaseT;
+
+
+class BackendImpl : public ImplBaseT
+{
+    class PackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+        /** contains the old tooltip description for the Extension Manager GUI in OOo v.2.x
+            We keep it for backward compatibility.
+        */
+        OUString m_oldDescription;
+        OUString m_url_expanded;
+        const bool m_legacyBundle;
+        Sequence< Reference<deployment::XPackage> > m_bundle;
+        Sequence< Reference<deployment::XPackage> > * m_pBundle;
+
+        ExtensionBackendDb::Data m_dbData;
+
+        Reference<deployment::XPackage> bindBundleItem(
+            OUString const & url, OUString const & mediaType,
+            bool bRemoved, //that is, using data base information
+            OUString const & identifier,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+            bool notifyDetectionError = true );
+
+        typedef std::vector< Reference<deployment::XPackage> > t_packagevec;
+        void scanBundle(
+            t_packagevec & bundle,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv );
+        void scanLegacyBundle(
+            t_packagevec & bundle,
+            OUString const & url,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+            bool skip_registration = false );
+        std::vector<Reference<deployment::XPackage> > getPackagesFromDb(
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv);
+        bool checkPlatform(
+            Reference<ucb::XCommandEnvironment > const &  environment);
+
+        bool checkDependencies(
+            Reference<ucb::XCommandEnvironment > const &
+                environment,
+            DescriptionInfoset const & description);
+            // throws css::uno::RuntimeException,
+            // css::deployment::DeploymentException
+
+        /// @throws deployment::DeploymentException
+        /// @throws ucb::CommandFailedException
+        /// @throws ucb::CommandAbortedException
+        /// @throws RuntimeException
+        bool checkLicense(
+            Reference< ucb::XCommandEnvironment > const & xCmdEnv,
+            DescriptionInfoset const & description, bool bNoLicenseChecking);
+        // @throws DeploymentException
+        OUString getTextFromURL(
+            const Reference< ucb::XCommandEnvironment >& xCmdEnv,
+            const OUString& licenseUrl);
+
+        DescriptionInfoset getDescriptionInfoset() const;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+        virtual void SAL_CALL disposing() override;
+
+
+    public:
+        PackageImpl(
+            ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+            OUString const & url,
+            OUString const & name,
+            Reference<deployment::XPackageTypeInfo> const & xPackageType,
+            bool legacyBundle,
+            bool bRemoved,
+            OUString const & identifier);
+
+        // XPackage
+        virtual sal_Bool SAL_CALL isBundle() override;
+
+        virtual Sequence< Reference<deployment::XPackage> > SAL_CALL getBundle(
+            Reference<task::XAbortChannel> const & xAbortChannel,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv ) override;
+        virtual OUString SAL_CALL getDescription() override;
+
+        virtual OUString SAL_CALL getLicenseText() override;
+
+        virtual void SAL_CALL exportTo(
+            OUString const & destFolderURL, OUString const & newTitle,
+            sal_Int32 nameClashAction,
+            Reference<ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+        virtual ::sal_Int32 SAL_CALL checkPrerequisites(
+            const Reference< task::XAbortChannel >& xAbortChannel,
+            const Reference< ucb::XCommandEnvironment >& xCmdEnv,
+            sal_Bool noLicenseChecking) override;
+
+        virtual sal_Bool SAL_CALL checkDependencies(
+            const Reference< ucb::XCommandEnvironment >& xCmdEnv ) override;
+
+        virtual beans::Optional<OUString> SAL_CALL getIdentifier() override;
+
+        virtual OUString SAL_CALL getVersion() override;
+
+        virtual Sequence<OUString> SAL_CALL getUpdateInformationURLs() override;
+
+        virtual beans::StringPair SAL_CALL getPublisherInfo() override;
+
+        virtual OUString SAL_CALL getDisplayName() override;
+
+        virtual Reference< graphic::XGraphic > SAL_CALL
+        getIcon( sal_Bool bHighContrast ) override;
+    };
+    friend class PackageImpl;
+
+    Reference<deployment::XPackageRegistry> m_xRootRegistry;
+    const Reference<deployment::XPackageTypeInfo> m_xBundleTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xLegacyBundleTypeInfo;
+    Sequence< Reference<deployment::XPackageTypeInfo> > m_typeInfos;
+
+    std::unique_ptr<ExtensionBackendDb> m_backendDb;
+
+    void addDataToDb(OUString const & url, ExtensionBackendDb::Data const & data);
+    ExtensionBackendDb::Data readDataFromDb(std::u16string_view url);
+    void revokeEntryFromDb(std::u16string_view url);
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        Reference<ucb::XCommandEnvironment> const & xCmdEnv ) override;
+
+    virtual void SAL_CALL disposing() override;
+
+public:
+    BackendImpl(
+        Sequence<Any> const & args,
+        Reference<XComponentContext> const & xComponentContext,
+        Reference<deployment::XPackageRegistry> const & xRootRegistry );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( OUString const& name ) override;
+    virtual Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+    using ImplBaseT::disposing;
+};
+
+//Used to find a XPackage with a particular URL
+class XPackage_eq
+{
+    OUString m_URL;
+public:
+    explicit XPackage_eq(OUString s) : m_URL(std::move(s)) {}
+    bool operator() (const Reference<deployment::XPackage> & p) const
+    {
+        return m_URL == p->getURL();
+    }
+};
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext,
+    Reference<deployment::XPackageRegistry> const & xRootRegistry )
+    : ImplBaseT( args, xComponentContext ),
+      m_xRootRegistry( xRootRegistry ),
+      m_xBundleTypeInfo( new Package::TypeInfo(
+                             "application/vnd.sun.star.package-bundle",
+                             "*.oxt;*.uno.pkg",
+                             DpResId(RID_STR_PACKAGE_BUNDLE)
+                             ) ),
+      m_xLegacyBundleTypeInfo( new Package::TypeInfo(
+                                   "application/vnd.sun.star.legacy-package-bundle",
+                                   "*.zip",
+                                   m_xBundleTypeInfo->getShortDescription()
+                                   ) ),
+    m_typeInfos{ m_xBundleTypeInfo, m_xLegacyBundleTypeInfo }
+{
+    if (!transientMode())
+    {
+        OUString dbFile = makeURL(getCachePath(), getImplementationName());
+        dbFile = makeURL(dbFile, "backenddb.xml");
+        m_backendDb.reset(
+            new ExtensionBackendDb(getComponentContext(), dbFile));
+    }
+}
+
+
+void BackendImpl::disposing()
+{
+    m_xRootRegistry.clear();
+    PackageRegistryBackend::disposing();
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.bundle.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService(OUString const & ServiceName)
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+Sequence<OUString> BackendImpl::getSupportedServiceNames()
+{
+    return { OUString(BACKEND_SERVICE_NAME) };
+}
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return m_typeInfos;
+}
+
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    //Notify the backend responsible for processing the different media
+    //types that this extension was removed.
+    ExtensionBackendDb::Data data = readDataFromDb(url);
+    for (auto const& item : data.items)
+    {
+        m_xRootRegistry->packageRemoved(item.first, item.second);
+    }
+
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_,
+    bool bRemoved, OUString const & identifier,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    OUString mediaType( mediaType_ );
+    if (mediaType.isEmpty())
+    {
+        // detect media-type:
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, url, xCmdEnv ))
+        {
+            if (ucbContent.isFolder())
+            {
+                //Every .oxt, uno.pkg file must contain a META-INF folder
+                ::ucbhelper::Content metaInfContent;
+                if (create_ucb_content(
+                    &metaInfContent, makeURL( url, "META-INF" ),
+                    xCmdEnv, false /* no throw */ ))
+                {
+                     mediaType = "application/vnd.sun.star.package-bundle";
+                }
+                //No support of legacy bundles, because every folder could be one.
+            }
+            else
+            {
+                const OUString title( StrTitle::getTitle( ucbContent ) );
+                if (title.endsWithIgnoreAsciiCase(".oxt") ||
+                    title.endsWithIgnoreAsciiCase(".uno.pkg"))
+                    mediaType = "application/vnd.sun.star.package-bundle";
+                else if (title.endsWithIgnoreAsciiCase(".zip"))
+                    mediaType = "application/vnd.sun.star.legacy-package-bundle";
+            }
+        }
+        if (mediaType.isEmpty())
+            throw lang::IllegalArgumentException(
+                StrCannotDetectMediaType() + url,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+
+            //In case a XPackage is created for a removed extension, we cannot
+            //obtain the name
+            OUString name;
+            if (!bRemoved)
+            {
+                ::ucbhelper::Content ucbContent(
+                    url, xCmdEnv, getComponentContext() );
+                name = StrTitle::getTitle( ucbContent );
+            }
+            if (subType.equalsIgnoreAsciiCase("vnd.sun.star.package-bundle"))
+            {
+                return new PackageImpl(
+                    this, url, name, m_xBundleTypeInfo, false, bRemoved,
+                    identifier);
+            }
+            else if (subType.equalsIgnoreAsciiCase( "vnd.sun.star.legacy-package-bundle"))
+            {
+                return new PackageImpl(
+                    this, url, name, m_xLegacyBundleTypeInfo, true, bRemoved,
+                    identifier);
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+void BackendImpl::addDataToDb(
+    OUString const & url, ExtensionBackendDb::Data const & data)
+{
+    if (m_backendDb)
+        m_backendDb->addEntry(url, data);
+}
+
+ExtensionBackendDb::Data BackendImpl::readDataFromDb(
+    std::u16string_view url)
+{
+    ExtensionBackendDb::Data data;
+    if (m_backendDb)
+        data = m_backendDb->getEntry(url);
+    return data;
+}
+
+void BackendImpl::revokeEntryFromDb(std::u16string_view url)
+{
+    if (m_backendDb)
+        m_backendDb->revokeEntry(url);
+}
+
+
+BackendImpl::PackageImpl::PackageImpl(
+    ::rtl::Reference<PackageRegistryBackend> const & myBackend,
+    OUString const & url,
+    OUString const & name,
+    Reference<deployment::XPackageTypeInfo> const & xPackageType,
+    bool legacyBundle, bool bRemoved, OUString const & identifier)
+    : Package( myBackend, url, name, name /* display-name */,
+               xPackageType, bRemoved, identifier),
+      m_url_expanded( expandUnoRcUrl( url ) ),
+      m_legacyBundle( legacyBundle ),
+      m_pBundle( nullptr )
+{
+    if (bRemoved)
+        m_dbData = getMyBackend()->readDataFromDb(url);
+}
+
+BackendImpl * BackendImpl::PackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException("Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<PackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+void BackendImpl::PackageImpl::disposing()
+{
+    sal_Int32 len = m_bundle.getLength();
+    Reference<deployment::XPackage> const * p = m_bundle.getConstArray();
+    for ( sal_Int32 pos = 0; pos < len; ++pos )
+        try_dispose( p[ pos ] );
+    m_bundle.realloc( 0 );
+
+    Package::disposing();
+}
+
+// Package
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::PackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    //In case the object was created for a removed extension (m_bRemoved = true)
+    //but the extension is not registered, then bundle will be empty. Then
+    //the return value will be Optional<...>.IsPresent= false. Although this is
+    //not true, this does not matter. Then registerPackage or revokePackage
+    //would never be called for the items. But since the extension is removed
+    //and not registered anyway, this does not matter.
+    const Sequence< Reference<deployment::XPackage> > bundle(
+        getBundle( abortChannel, xCmdEnv ) );
+
+    bool reg = false;
+    bool present = false;
+    bool ambig = false;
+    for ( sal_Int32 pos = bundle.getLength(); pos--; )
+    {
+        Reference<deployment::XPackage> const & xPackage = bundle[ pos ];
+        Reference<task::XAbortChannel> xSubAbortChannel(
+            xPackage->createAbortChannel() );
+        AbortChannel::Chain chain( abortChannel, xSubAbortChannel );
+        beans::Optional< beans::Ambiguous<sal_Bool> > option(
+            xPackage->isRegistered( xSubAbortChannel, xCmdEnv ) );
+
+        //present = true if at least one bundle item has this value.
+        //reg = true if all bundle items have an option value (option.IsPresent == 1)
+        //and all have value of true (option.Value.Value == true)
+        //If not, then the bundle has the status of not registered and ambiguous.
+        if (option.IsPresent)
+        {
+            beans::Ambiguous<sal_Bool> const & status = option.Value;
+            if (present)
+            {
+                //we never come here in the first iteration
+                if (reg != bool(status.Value)) {
+
+                    ambig = true;
+                    reg = false;
+                    break;
+                }
+            }
+            else
+            {
+                //we always come here in the first iteration
+                reg = status.Value;
+                present = true;
+            }
+        }
+    }
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        present, beans::Ambiguous<sal_Bool>(reg, ambig) );
+}
+
+OUString BackendImpl::PackageImpl::getTextFromURL(
+    const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv,
+    const OUString& licenseUrl)
+{
+    try
+    {
+        ::ucbhelper::Content descContent(
+            licenseUrl, xCmdEnv, getMyBackend()->getComponentContext());
+        std::vector<sal_Int8> seq = dp_misc::readFile(descContent);
+        return OUString( reinterpret_cast<char const *>(
+            seq.data()), seq.size(), RTL_TEXTENCODING_UTF8);
+    }
+    catch (const css::uno::Exception&)
+    {
+        Any exc( ::cppu::getCaughtException() );
+        throw css::deployment::DeploymentException(
+                "Could not read file " + licenseUrl, nullptr, exc);
+    }
+
+}
+
+DescriptionInfoset BackendImpl::PackageImpl::getDescriptionInfoset() const
+{
+    return dp_misc::getDescriptionInfoset(m_url_expanded);
+}
+
+bool BackendImpl::PackageImpl::checkPlatform(
+    css::uno::Reference< css::ucb::XCommandEnvironment > const &  environment)
+{
+    bool ret = false;
+    DescriptionInfoset info(getDescriptionInfoset());
+    Sequence<OUString> platforms(info.getSupportedPlatforms());
+    if (hasValidPlatform(platforms))
+    {
+        ret = true;
+    }
+    else
+    {
+        ret = false;
+        OUString msg(
+            "unsupported platform");
+        Any e(
+            css::deployment::PlatformException(
+                msg, static_cast<OWeakObject *>(this), this));
+        if (!interactContinuation(
+                e, cppu::UnoType< css::task::XInteractionApprove >::get(),
+                environment, nullptr, nullptr))
+        {
+            throw css::deployment::DeploymentException(
+                msg, static_cast<OWeakObject *>(this), e);
+        }
+    }
+    return ret;
+}
+
+
+bool BackendImpl::PackageImpl::checkDependencies(
+    css::uno::Reference< css::ucb::XCommandEnvironment > const & environment,
+    DescriptionInfoset const & description)
+{
+    css::uno::Sequence< css::uno::Reference< css::xml::dom::XElement > >
+        unsatisfied(dp_misc::Dependencies::check(description));
+
+    if (!unsatisfied.hasElements()) {
+        return true;
+    } else {
+        OUString msg(
+            "unsatisfied dependencies");
+        Any e(
+            css::deployment::DependencyException(
+                msg, static_cast<OWeakObject *>(this), unsatisfied));
+        if (!interactContinuation(
+                e, cppu::UnoType< css::task::XInteractionApprove >::get(),
+                environment, nullptr, nullptr))
+        {
+            throw css::deployment::DeploymentException(
+                msg, static_cast<OWeakObject *>(this), e);
+        }
+        return false;
+    }
+}
+
+bool BackendImpl::PackageImpl::checkLicense(
+    css::uno::Reference< css::ucb::XCommandEnvironment > const & xCmdEnv,
+    DescriptionInfoset const & info, bool alreadyInstalled)
+{
+    try
+    {
+        ::std::optional<SimpleLicenseAttributes> simplLicAttr
+            = info.getSimpleLicenseAttributes();
+        if (! simplLicAttr)
+            return true;
+        OUString sLic = info.getLocalizedLicenseURL();
+        //If we do not get a localized licence then there is an error in the description.xml
+        //This should be handled by using a validating parser. Therefore we assume that no
+        //license is available.
+        if (sLic.isEmpty())
+            throw css::deployment::DeploymentException(
+                "Could not obtain path to license. Possible error in description.xml", nullptr, Any());
+        OUString sHref = m_url_expanded + "/" + sLic;
+        OUString sLicense = getTextFromURL(xCmdEnv, sHref);
+        ////determine who has to agree to the license
+        //check correct value for attribute
+        if ( simplLicAttr->acceptBy != "user" && simplLicAttr->acceptBy != "admin")
+            throw css::deployment::DeploymentException(
+                "Could not obtain attribute simple-license@accept-by or it has no valid value", nullptr, Any());
+
+
+        //Only use interaction if there is no version of this extension already installed
+        //and the suppress-on-update flag is not set for the new extension
+        // alreadyInstalled | bSuppressOnUpdate | show license
+
+        //      0     |      0            |     1
+        //      0     |      1            |     1
+        //      1     |      0            |     1
+        //      1     |      1            |     0
+
+        if ( !(alreadyInstalled && simplLicAttr->suppressOnUpdate))
+        {
+            css::deployment::LicenseException licExc(
+                OUString(), nullptr, getDisplayName(), sLicense,
+                simplLicAttr->acceptBy);
+            bool approve = false;
+            bool abort = false;
+            if (! interactContinuation(
+                Any(licExc), cppu::UnoType<task::XInteractionApprove>::get(), xCmdEnv, &approve, &abort ))
+                throw css::deployment::DeploymentException(
+                    "Could not interact with user.", nullptr, Any());
+
+            return approve;
+        }
+        return true;
+    } catch (const css::ucb::CommandFailedException&) {
+        throw;
+    } catch (const css::ucb::CommandAbortedException&) {
+        throw;
+    } catch (const css::deployment::DeploymentException&) {
+        throw;
+    } catch (const css::uno::RuntimeException&) {
+        throw;
+    } catch (const css::uno::Exception&) {
+        Any anyExc = cppu::getCaughtException();
+        throw css::deployment::DeploymentException("Unexpected exception", nullptr, anyExc);
+    }
+}
+
+::sal_Int32 BackendImpl::PackageImpl::checkPrerequisites(
+        const css::uno::Reference< css::task::XAbortChannel >&,
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv,
+        sal_Bool alreadyInstalled)
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    DescriptionInfoset info = getDescriptionInfoset();
+    if (!info.hasDescription())
+        return 0;
+
+    //always return LICENSE as long as the user did not accept the license
+    //so that XExtensionManager::checkPrerequisitesAndEnable will again
+    //check the license
+    if (!checkPlatform(xCmdEnv))
+        return deployment::Prerequisites::PLATFORM |
+            deployment::Prerequisites::LICENSE;
+    else if(!checkDependencies(xCmdEnv, info))
+        return deployment::Prerequisites::DEPENDENCIES |
+            deployment::Prerequisites::LICENSE;
+    else if(!checkLicense(xCmdEnv, info, alreadyInstalled))
+        return deployment::Prerequisites::LICENSE;
+    else
+        return 0;
+}
+
+sal_Bool BackendImpl::PackageImpl::checkDependencies(
+        const css::uno::Reference< css::ucb::XCommandEnvironment >& xCmdEnv )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    DescriptionInfoset info = getDescriptionInfoset();
+    if (!info.hasDescription())
+        return true;
+
+    return checkDependencies(xCmdEnv, info);
+}
+
+beans::Optional<OUString> BackendImpl::PackageImpl::getIdentifier()
+{
+    OUString identifier;
+    if (m_bRemoved)
+        identifier = m_identifier;
+    else
+        identifier = dp_misc::generateIdentifier(
+            getDescriptionInfoset().getIdentifier(), m_name);
+
+    return beans::Optional<OUString>(
+        true, identifier);
+}
+
+OUString BackendImpl::PackageImpl::getVersion()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return getDescriptionInfoset().getVersion();
+}
+
+Sequence<OUString> BackendImpl::PackageImpl::getUpdateInformationURLs()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    return getDescriptionInfoset().getUpdateInformationUrls();
+}
+
+beans::StringPair BackendImpl::PackageImpl::getPublisherInfo()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+    std::pair< OUString, OUString > aInfo = getDescriptionInfoset().getLocalizedPublisherNameAndURL();
+    beans::StringPair aStrPair( aInfo.first, aInfo.second );
+    return aStrPair;
+}
+
+
+uno::Reference< graphic::XGraphic > BackendImpl::PackageImpl::getIcon( sal_Bool bHighContrast )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    uno::Reference< graphic::XGraphic > xGraphic;
+
+    OUString aIconURL = getDescriptionInfoset().getIconURL( bHighContrast );
+    if ( !aIconURL.isEmpty() )
+    {
+        OUString aFullIconURL = m_url_expanded + "/" + aIconURL;
+
+        uno::Reference< XComponentContext > xContext( getMyBackend()->getComponentContext() );
+        uno::Reference< graphic::XGraphicProvider > xGraphProvider( graphic::GraphicProvider::create(xContext) );
+
+        uno::Sequence< beans::PropertyValue > aMediaProps{ comphelper::makePropertyValue(
+            "URL", aFullIconURL) };
+        xGraphic = xGraphProvider->queryGraphic( aMediaProps );
+    }
+
+    return xGraphic;
+}
+
+
+void BackendImpl::PackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool startup,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    const Sequence< Reference<deployment::XPackage> > bundle(
+        getBundle( abortChannel, xCmdEnv ) );
+
+    if (doRegisterPackage)
+    {
+        ExtensionBackendDb::Data data;
+        const sal_Int32 len = bundle.getLength();
+        for ( sal_Int32 pos = 0; pos < len; ++pos )
+        {
+            checkAborted(abortChannel);
+            Reference<deployment::XPackage> const & xPackage = bundle[ pos ];
+            Reference<task::XAbortChannel> xSubAbortChannel(
+                xPackage->createAbortChannel() );
+            AbortChannel::Chain chain( abortChannel, xSubAbortChannel );
+            try {
+                xPackage->registerPackage( startup, xSubAbortChannel, xCmdEnv );
+            }
+            catch (const Exception &)
+            {
+               //We even try a rollback if the user cancelled the action (CommandAbortedException)
+                //in order to prevent invalid database entries.
+                Any exc( ::cppu::getCaughtException() );
+                // try to handle exception, notify:
+                bool approve = false, abort = false;
+                if (! interactContinuation(
+                        Any( lang::WrappedTargetException(
+                                 "bundle item registration error!",
+                                 static_cast<OWeakObject *>(this), exc ) ),
+                        cppu::UnoType<task::XInteractionApprove>::get(), xCmdEnv,
+                        &approve, &abort )) {
+                    OSL_ASSERT( !approve && !abort );
+                    if (m_legacyBundle) // default for legacy packages: ignore
+                        continue;
+                    // no selection at all, so rethrow;
+                    // no C++ rethrow after getCaughtException(),
+                    // see cppuhelper/exc_hlp.hxx:
+                    ::cppu::throwException(exc);
+                }
+                if (approve && !abort) // ignore error, just continue
+                    continue;
+
+                {
+                    ProgressLevel progress( xCmdEnv, "rollback..." );
+                    // try rollback
+                    for ( ; pos--; )
+                    {
+                        try {
+                            bundle[ pos ]->revokePackage(
+                                startup, xSubAbortChannel, xCmdEnv );
+                        }
+                        catch (const Exception &)
+                        {
+                            TOOLS_WARN_EXCEPTION( "desktop", "" );
+                            // ignore any errors of rollback
+                        }
+                    }
+                    progress.update( "rollback finished." );
+                }
+
+                deployment::DeploymentException dpExc;
+                if (exc >>= dpExc) {
+                    throw ucb::CommandFailedException(
+                        dpExc.Message, dpExc.Context, dpExc.Cause );
+                }
+                else {
+                    // rethrow CommandFailedException
+                    ::cppu::throwException(exc);
+                }
+            }
+            data.items.emplace_back(xPackage->getURL(),
+                                 xPackage->getPackageType()->getMediaType());
+        }
+        getMyBackend()->addDataToDb(getURL(), data);
+    }
+    else
+    {
+        // revoke in reverse order:
+        for ( sal_Int32 pos = bundle.getLength(); pos--; )
+        {
+            checkAborted(abortChannel);
+            Reference<deployment::XPackage> const & xPackage = bundle[ pos ];
+            Reference<task::XAbortChannel> xSubAbortChannel(
+                xPackage->createAbortChannel() );
+            AbortChannel::Chain chain( abortChannel, xSubAbortChannel );
+            try {
+                bundle[ pos ]->revokePackage(
+                    startup, xSubAbortChannel, xCmdEnv );
+            }
+            catch (const RuntimeException &) {
+                throw;
+            }
+            catch (const ucb::CommandAbortedException &) {
+                throw;
+            }
+            catch (const Exception &) {
+                // CommandFailedException, DeploymentException:
+                Any exc( ::cppu::getCaughtException() );
+                // try to handle exception, notify:
+                bool approve = false, abort = false;
+                if (! interactContinuation(
+                        Any( lang::WrappedTargetException(
+                                 "bundle item revocation error!",
+                                 static_cast<OWeakObject *>(this), exc ) ),
+                        cppu::UnoType<task::XInteractionApprove>::get(), xCmdEnv,
+                        &approve, &abort )) {
+                    OSL_ASSERT( !approve && !abort );
+                    if (m_legacyBundle) // default for legacy packages: ignore
+                        continue;
+                    // no selection at all, so rethrow
+                    // no C++ rethrow after getCaughtException(),
+                    // see cppuhelper/exc_hlp.hxx:
+                    ::cppu::throwException(exc);
+                }
+                // ignore errors when revoking, although abort may have been
+                // selected
+            }
+        }
+        getMyBackend()->revokeEntryFromDb(getURL());
+    }
+}
+
+
+OUString BackendImpl::PackageImpl::getDescription()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    const OUString sRelativeURL(getDescriptionInfoset().getLocalizedDescriptionURL());
+    OUString sDescription;
+    if (!sRelativeURL.isEmpty())
+    {
+        OUString sURL = m_url_expanded + "/" + sRelativeURL;
+
+        try
+        {
+            sDescription = getTextFromURL( css::uno::Reference< css::ucb::XCommandEnvironment >(), sURL );
+        }
+        catch ( const css::deployment::DeploymentException& )
+        {
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+    }
+
+    if (!sDescription.isEmpty())
+        return sDescription;
+    return m_oldDescription;
+}
+
+
+OUString BackendImpl::PackageImpl::getLicenseText()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    OUString sLicense;
+    DescriptionInfoset aInfo = getDescriptionInfoset();
+
+    ::std::optional< SimpleLicenseAttributes > aSimplLicAttr = aInfo.getSimpleLicenseAttributes();
+    if ( aSimplLicAttr )
+    {
+        OUString aLicenseURL = aInfo.getLocalizedLicenseURL();
+
+        if ( !aLicenseURL.isEmpty() )
+        {
+            OUString aFullURL = m_url_expanded + "/" + aLicenseURL;
+            sLicense = getTextFromURL( Reference< ucb::XCommandEnvironment >(), aFullURL);
+        }
+    }
+
+    return sLicense;
+}
+
+
+void BackendImpl::PackageImpl::exportTo(
+    OUString const & destFolderURL, OUString const & newTitle,
+    sal_Int32 nameClashAction, Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    ::ucbhelper::Content sourceContent(
+        m_url_expanded, xCmdEnv, getMyBackend()->getComponentContext() );
+    OUString title(newTitle);
+    if (title.isEmpty())
+        sourceContent.getPropertyValue( "Title" ) >>= title;
+    OUString destURL( makeURL( destFolderURL, ::rtl::Uri::encode(
+                                   title, rtl_UriCharClassPchar,
+                                   rtl_UriEncodeIgnoreEscapes,
+                                   RTL_TEXTENCODING_UTF8 ) ) );
+
+    if (nameClashAction == ucb::NameClash::ASK)
+    {
+        if (create_ucb_content(
+                nullptr, destURL, xCmdEnv, false /* no throw */ )) {
+            bool replace = false, abort = false;
+            if (! interactContinuation(
+                    Any( ucb::NameClashResolveRequest(
+                             "file already exists: " + title,
+                             static_cast<OWeakObject *>(this),
+                             task::InteractionClassification_QUERY,
+                             destFolderURL, title, OUString() ) ),
+                    cppu::UnoType<ucb::XInteractionReplaceExistingData>::get(), xCmdEnv,
+                    &replace, &abort ) || !replace) {
+                return;
+            }
+        }
+    }
+    else if (nameClashAction != ucb::NameClash::OVERWRITE) {
+        throw ucb::CommandFailedException("unsupported nameClashAction!",
+            static_cast<OWeakObject *>(this), Any() );
+    }
+    erase_path( destURL, xCmdEnv );
+
+    OUString destFolder =
+        "vnd.sun.star.zip://" +
+        ::rtl::Uri::encode( destURL,
+                            rtl_UriCharClassRegName,
+                            rtl_UriEncodeIgnoreEscapes,
+                            RTL_TEXTENCODING_UTF8 ) +
+        "/";
+
+    ::ucbhelper::Content destFolderContent(
+        destFolder, xCmdEnv, getMyBackend()->getComponentContext() );
+    {
+        // transfer every item of folder into zip:
+        Reference<sdbc::XResultSet> xResultSet(
+            sourceContent.createCursor( Sequence<OUString>() ) );
+        ProgressLevel progress( xCmdEnv, OUString() );
+        while (xResultSet->next())
+        {
+            ::ucbhelper::Content subContent(
+                Reference<ucb::XContentAccess>(
+                    xResultSet, UNO_QUERY_THROW )->queryContent(),
+                xCmdEnv, getMyBackend()->getComponentContext() );
+            destFolderContent.transferContent(
+                    subContent, ::ucbhelper::InsertOperation::Copy,
+                    OUString(), ucb::NameClash::OVERWRITE );
+            progress.update( Any() ); // animating progress bar
+        }
+    }
+
+    // assure META-INF folder:
+    ::ucbhelper::Content metainfFolderContent;
+    create_folder( &metainfFolderContent,
+                   makeURL( destFolderContent.getURL(), "META-INF" ),
+                   xCmdEnv );
+
+    if (m_legacyBundle)
+    {
+        // easy to migrate legacy bundles to new format:
+        // just export them once using a .oxt name!
+        // set detected media-types of any bundle item:
+
+        // collect all manifest entries:
+        Sequence< Reference<deployment::XPackage> > bundle;
+        try {
+            bundle = getBundle( Reference<task::XAbortChannel>(), xCmdEnv );
+        }
+        // xxx todo: think about exception specs:
+        catch (const deployment::DeploymentException &) {
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+        catch (const lang::IllegalArgumentException &) {
+            TOOLS_WARN_EXCEPTION( "desktop", "" );
+        }
+
+        std::vector< Sequence<beans::PropertyValue> > manifest;
+        manifest.reserve( bundle.getLength() );
+        sal_Int32 baseURLlen = m_url_expanded.getLength();
+        Reference<deployment::XPackage> const *pbundle = bundle.getConstArray();
+        static const OUStringLiteral strMediaType( u"MediaType" );
+        static const OUStringLiteral strFullPath( u"FullPath" );
+        static const OUStringLiteral strIsFolder( u"IsFolder" );
+        for ( sal_Int32 pos = bundle.getLength(); pos--; )
+        {
+            Reference<deployment::XPackage> const & xPackage = pbundle[ pos ];
+            OUString url_( expandUnoRcUrl( xPackage->getURL() ) );
+            OSL_ASSERT( url_.getLength() >= baseURLlen );
+            OUString fullPath;
+            if (url_.getLength() > baseURLlen)
+                fullPath = url_.copy( baseURLlen + 1 );
+            ::ucbhelper::Content ucbContent(
+                url_, xCmdEnv, getMyBackend()->getComponentContext() );
+            if (ucbContent.getPropertyValue(strIsFolder).get<bool>())
+                fullPath += "/";
+            Sequence<beans::PropertyValue> attribs( 2 );
+            beans::PropertyValue * pattribs = attribs.getArray();
+            pattribs[ 0 ].Name = strFullPath;
+            pattribs[ 0 ].Value <<= fullPath;
+            pattribs[ 1 ].Name = strMediaType;
+            const Reference<deployment::XPackageTypeInfo> xPackageType(
+                xPackage->getPackageType() );
+            OUString mediaType;
+            OSL_ASSERT( xPackageType.is() );
+            if (xPackageType.is())
+                mediaType = xPackageType->getMediaType();
+            else
+                mediaType = "unknown";
+            pattribs[ 1 ].Value <<= mediaType;
+            manifest.push_back( attribs );
+        }
+
+        // write into pipe:
+        Reference<XComponentContext> xContext(
+            getMyBackend()->getComponentContext() );
+        Reference<packages::manifest::XManifestWriter> xManifestWriter =
+            packages::manifest::ManifestWriter::create( xContext );
+        Reference<io::XOutputStream> xPipe( io::Pipe::create(xContext), UNO_QUERY_THROW );
+        xManifestWriter->writeManifestSequence(
+            xPipe, comphelper::containerToSequence(manifest) );
+
+        // write buffered pipe data to content:
+        ::ucbhelper::Content manifestContent(
+            makeURL( metainfFolderContent.getURL(), "manifest.xml" ),
+            xCmdEnv, getMyBackend()->getComponentContext() );
+        manifestContent.writeStream(
+            Reference<io::XInputStream>( xPipe, UNO_QUERY_THROW ),
+            true /* replace existing */ );
+    }
+    else
+    {
+        bool bSuccess = false;
+        try
+        {
+            // overwrite manifest.xml:
+            ::ucbhelper::Content manifestContent;
+            if ( ! create_ucb_content(
+                &manifestContent,
+                makeURL( m_url_expanded, "META-INF/manifest.xml" ),
+                xCmdEnv, false ) )
+            {
+                OSL_FAIL( "### missing META-INF/manifest.xml file!" );
+                return;
+            }
+
+            metainfFolderContent.transferContent(
+                  manifestContent, ::ucbhelper::InsertOperation::Copy,
+                  OUString(), ucb::NameClash::OVERWRITE );
+            bSuccess = true;
+        }
+        catch (const css::ucb::ContentCreationException &)
+        {
+            TOOLS_WARN_EXCEPTION("desktop.deployment", "exception on overwriting manifest");
+        }
+
+        if (!bSuccess)
+            throw RuntimeException( "UCB transferContent() failed!",
+                                    static_cast<OWeakObject *>(this) );
+    }
+
+    // xxx todo: maybe obsolete in the future
+    try {
+        destFolderContent.executeCommand( "flush", Any() );
+    }
+    catch (const ucb::UnsupportedCommandException &) {
+    }
+}
+
+
+sal_Bool BackendImpl::PackageImpl::isBundle()
+{
+    return true;
+}
+
+
+Sequence< Reference<deployment::XPackage> > BackendImpl::PackageImpl::getBundle(
+    Reference<task::XAbortChannel> const & xAbortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    Sequence< Reference<deployment::XPackage> > * pBundle = m_pBundle;
+    if (pBundle == nullptr)
+    {
+        t_packagevec bundle;
+        if (m_bRemoved)
+        {
+            bundle = getPackagesFromDb(xCmdEnv);
+        }
+        else
+        {
+            try {
+                if (m_legacyBundle)
+                {
+                    // .zip legacy packages allow script.xlb, dialog.xlb in bundle
+                    // root folder:
+                    OUString mediaType;
+                    // probe for script.xlb:
+                    if (create_ucb_content(
+                            nullptr, makeURL( m_url_expanded, "script.xlb" ),
+                            xCmdEnv, false /* no throw */ )) {
+                        mediaType = "application/vnd.sun.star.basic-library";
+                    }
+                    // probe for dialog.xlb:
+                    else if (create_ucb_content(
+                                 nullptr, makeURL( m_url_expanded, "dialog.xlb" ),
+                                 xCmdEnv, false /* no throw */ ))
+                        mediaType = "application/vnd.sun.star.dialog-library";
+
+                    if (!mediaType.isEmpty()) {
+                        const Reference<deployment::XPackage> xPackage(
+                            bindBundleItem( getURL(), mediaType, false, OUString(),
+                                            xCmdEnv ) );
+                        if (xPackage.is())
+                            bundle.push_back( xPackage );
+                        // continue scanning:
+                    }
+                    scanLegacyBundle( bundle, getURL(),
+                                      AbortChannel::get(xAbortChannel), xCmdEnv );
+                }
+                else
+                {
+                    // .oxt:
+                    scanBundle( bundle, AbortChannel::get(xAbortChannel), xCmdEnv );
+                }
+
+            }
+            catch (const RuntimeException &) {
+                throw;
+            }
+            catch (const ucb::CommandFailedException &) {
+                throw;
+            }
+            catch (const ucb::CommandAbortedException &) {
+                throw;
+            }
+            catch (const deployment::DeploymentException &) {
+                throw;
+            }
+            catch (const Exception &) {
+                Any exc( ::cppu::getCaughtException() );
+                throw deployment::DeploymentException(
+                    "error scanning bundle: " + getURL(),
+                    static_cast<OWeakObject *>(this), exc );
+            }
+        }
+
+        // sort: schema before config data, typelibs before components:
+        Sequence< Reference<deployment::XPackage> > ret( bundle.size() );
+        Reference<deployment::XPackage> * pret = ret.getArray();
+        sal_Int32 lower_end = 0;
+        sal_Int32 upper_end = ret.getLength();
+        for (auto const& elem : bundle)
+        {
+            const Reference<deployment::XPackageTypeInfo> xPackageType(
+                elem->getPackageType() );
+            OSL_ASSERT( xPackageType.is() );
+            if (xPackageType.is())
+            {
+                const OUString mediaType( xPackageType->getMediaType() );
+                OUString type, subType;
+                INetContentTypeParameterList params;
+                if (INetContentTypes::parse( mediaType, type, subType, &params ) &&
+                    type.equalsIgnoreAsciiCase("application") &&
+                    (subType.equalsIgnoreAsciiCase( "vnd.sun.star.uno-component") ||
+                     subType.equalsIgnoreAsciiCase( "vnd.sun.star.configuration-data")))
+                {
+                    --upper_end;
+                    pret[ upper_end ] = elem;
+                    continue;
+                }
+            }
+            pret[ lower_end ] = elem;
+            ++lower_end;
+        }
+        OSL_ASSERT( lower_end == upper_end );
+
+        const ::osl::MutexGuard guard( m_aMutex );
+        pBundle = m_pBundle;
+        if (pBundle == nullptr) {
+            m_bundle = ret;
+            pBundle = &m_bundle;
+            OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
+            m_pBundle = pBundle;
+        }
+    }
+    else {
+        OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
+    }
+    return *pBundle;
+}
+
+bool isBundle_( std::u16string_view mediaType )
+{
+    // xxx todo: additional parsing?
+    return !mediaType.empty() &&
+        (o3tl::matchIgnoreAsciiCase( mediaType, u"application/vnd.sun.star.package-bundle") ||
+         o3tl::matchIgnoreAsciiCase( mediaType, u"application/vnd.sun.star.legacy-package-bundle"));
+}
+
+
+Reference<deployment::XPackage> BackendImpl::PackageImpl::bindBundleItem(
+    OUString const & url, OUString const & mediaType,
+    bool bRemoved, OUString const & identifier,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+    bool notifyDetectionError )
+{
+    // ignore any nested bundles:
+    if (isBundle_(mediaType))
+        return Reference<deployment::XPackage>();
+
+    Reference<deployment::XPackage>xPackage;
+    try {
+        try {
+            xPackage.set( getMyBackend()->m_xRootRegistry->bindPackage(
+                              url, mediaType, bRemoved, identifier, xCmdEnv ) );
+            OSL_ASSERT( xPackage.is() );
+        } catch (css::lang::IllegalArgumentException & e) {
+            css::uno::Any exc(cppu::getCaughtException());
+            throw css::lang::WrappedTargetException(
+                "wrapped: " + e.Message, e.Context, exc);
+        }
+    }
+    catch (const RuntimeException &) {
+        throw;
+    }
+    catch (const ucb::CommandFailedException &) {
+        // ignore already handled error
+    }
+    catch (const Exception &) {
+        const Any exc( ::cppu::getCaughtException() );
+        if (notifyDetectionError ||
+            !exc.isExtractableTo( cppu::UnoType<lang::IllegalArgumentException>::get()) )
+        {
+            (void)interactContinuation(
+                Any( lang::WrappedTargetException("bundle item error!",
+                         static_cast<OWeakObject *>(this), exc ) ),
+                cppu::UnoType<task::XInteractionApprove>::get(), xCmdEnv, nullptr, nullptr );
+        }
+    }
+
+    if (xPackage.is()) {
+        const Reference<deployment::XPackageTypeInfo> xPackageType(
+            xPackage->getPackageType() );
+        OSL_ASSERT( xPackageType.is() );
+        // ignore any nested bundles:
+        if (xPackageType.is() && isBundle_( xPackageType->getMediaType() ))
+            xPackage.clear();
+    }
+    return xPackage;
+}
+
+
+void BackendImpl::PackageImpl::scanBundle(
+    t_packagevec & bundle,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv )
+{
+    OSL_ASSERT( !m_legacyBundle );
+
+    OUString mfUrl( makeURL( m_url_expanded, "META-INF/manifest.xml" ) );
+    ::ucbhelper::Content manifestContent;
+    if (! create_ucb_content(
+            &manifestContent, mfUrl, xCmdEnv, false /* no throw */ ))
+    {
+        SAL_WARN(
+            "desktop.deployment",
+            "cannot create UCB Content for <" << mfUrl << ">" );
+        return;
+    }
+
+
+    const LanguageTag& officeLocale = getOfficeLanguageTag();
+    const std::vector< OUString > officeFallbacks( officeLocale.getFallbackStrings( true));
+    const size_t nPenaltyMax = std::numeric_limits<size_t>::max();
+    size_t descrPenalty = nPenaltyMax;
+    OUString descrFile;
+
+    const Reference<XComponentContext> xContext(
+        getMyBackend()->getComponentContext() );
+    Reference<packages::manifest::XManifestReader> xManifestReader =
+        packages::manifest::ManifestReader::create( xContext );
+    const Sequence< Sequence<beans::PropertyValue> > manifestSeq(
+        xManifestReader->readManifestSequence( manifestContent.openStream() ) );
+    const OUString packageRootURL( getURL() );
+    for ( sal_Int32 pos = manifestSeq.getLength(); pos--; )
+    {
+        OUString fullPath, mediaType;
+        Sequence<beans::PropertyValue> const & attribs = manifestSeq[ pos ];
+        for ( sal_Int32 i = attribs.getLength(); i--; )
+        {
+            if (!(fullPath.isEmpty() || mediaType.isEmpty()))
+                break;
+            if ( attribs[i].Name == "FullPath" )
+                attribs[i].Value >>= fullPath;
+            else if ( attribs[i].Name == "MediaType" )
+                attribs[i].Value >>= mediaType;
+        }
+
+        if ( fullPath.isEmpty() || mediaType.isEmpty() || mediaType == "text/xml" )// opt: exclude common text/xml
+            continue;
+
+        OUString type, subType;
+        INetContentTypeParameterList params;
+        if (! INetContentTypes::parse( mediaType, type, subType, &params ))
+            continue;
+
+        {
+            auto const iter = params.find("platform");
+            if (iter != params.end() && !platform_fits(iter->second.m_sValue))
+                continue;
+        }
+        const OUString url( makeURL( packageRootURL, fullPath ) );
+
+        // check for bundle description:
+        if (type.equalsIgnoreAsciiCase("application") &&
+            subType.equalsIgnoreAsciiCase( "vnd.sun.star.package-bundle-description"))
+        {
+            // check locale:
+            auto const iter = params.find("locale");
+            if (iter == params.end())
+            {
+                if (descrFile.isEmpty())
+                    descrFile = url;
+            }
+            else {
+                // match best locale:
+                LanguageTag descrTag(iter->second.m_sValue);
+                if (officeLocale.getLanguage() == descrTag.getLanguage())
+                {
+                    size_t nPenalty = nPenaltyMax;
+                    const std::vector< OUString > descrFallbacks( descrTag.getFallbackStrings( true));
+                    for (size_t o=0; o < officeFallbacks.size() && nPenalty == nPenaltyMax; ++o)
+                    {
+                        for (size_t d=0; d < descrFallbacks.size() && nPenalty == nPenaltyMax; ++d)
+                        {
+                            if (officeFallbacks[o] == descrFallbacks[d])
+                            {
+                                // The last fallbacks are always language-only
+                                // fallbacks, so we _will_ have _some_ match if
+                                // we ever entered the overall if() condition.
+                                nPenalty = o * 1000 + d;
+                                if (descrPenalty > nPenalty)
+                                {
+                                    descrPenalty = nPenalty;
+                                    descrFile = url;
+                                }
+                            }
+                        }
+                    }
+                }
+                // TODO: we could break here if descrPenalty==0 for an exact
+                // match of officeLocale, but the previous code didn't; are
+                // there side effects?
+            }
+            continue;
+        }
+
+        checkAborted( abortChannel );
+
+        //We make sure that we only create one XPackage for a particular URL.
+        //Sometime programmers insert the same URL several times in the manifest
+        //which may lead to DisposedExceptions.
+        if (std::none_of(bundle.begin(), bundle.end(), XPackage_eq(url)))
+        {
+            const Reference<deployment::XPackage> xPackage(
+                bindBundleItem( url, mediaType, false, OUString(), xCmdEnv ) );
+            if (xPackage.is())
+                bundle.push_back( xPackage );
+        }
+        else
+        {
+            SAL_WARN("desktop.deployment", "manifest.xml contains a duplicate entry (from " << url << ")");
+        }
+    }
+
+    if (descrFile.isEmpty())
+        return;
+
+    ::ucbhelper::Content descrFileContent;
+    if (!create_ucb_content( &descrFileContent, descrFile,
+                            xCmdEnv, false /* no throw */ ))
+        return;
+
+    // patch description:
+    std::vector<sal_Int8> bytes( readFile( descrFileContent ) );
+    OUStringBuffer buf;
+    if ( !bytes.empty() )
+    {
+        buf.append( OUString( reinterpret_cast<char const *>(
+                                  bytes.data() ),
+                              bytes.size(), RTL_TEXTENCODING_UTF8 ) );
+    }
+    else
+    {
+        buf.append( Package::getDescription() );
+    }
+    m_oldDescription = buf.makeStringAndClear();
+}
+
+
+void BackendImpl::PackageImpl::scanLegacyBundle(
+    t_packagevec & bundle,
+    OUString const & url,
+    ::rtl::Reference<AbortChannel> const & abortChannel,
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv,
+    bool skip_registration )
+{
+    ::ucbhelper::Content ucbContent(
+        url, xCmdEnv, getMyBackend()->getComponentContext() );
+
+    // check for platform paths:
+    const OUString title( StrTitle::getTitle( ucbContent ) );
+    if (title.endsWithIgnoreAsciiCase( ".plt" ) &&
+        !platform_fits( title.subView( 0, title.getLength() - 4 ) )) {
+        return;
+    }
+    if (title.endsWithIgnoreAsciiCase("skip_registration") )
+        skip_registration = true;
+
+    Sequence<OUString> ar { OUString("Title"), OUString("IsFolder") };
+    Reference<sdbc::XResultSet> xResultSet( ucbContent.createCursor( ar ) );
+    while (xResultSet->next())
+    {
+        checkAborted( abortChannel );
+
+        const Reference<sdbc::XRow> xRow( xResultSet, UNO_QUERY_THROW );
+        const OUString title_enc( ::rtl::Uri::encode(
+                                      xRow->getString( 1 /* Title */ ),
+                                      rtl_UriCharClassPchar,
+                                      rtl_UriEncodeIgnoreEscapes,
+                                      RTL_TEXTENCODING_UTF8 ) );
+        const OUString path( makeURL( url, title_enc ) );
+
+        OUString mediaType;
+        const Reference<deployment::XPackage> xPackage(
+            bindBundleItem( path, OUString() /* detect */, false, OUString(),
+                            xCmdEnv, false /* ignore detection errors */ ) );
+        if (xPackage.is()) {
+            const Reference<deployment::XPackageTypeInfo> xPackageType(
+                xPackage->getPackageType() );
+            OSL_ASSERT( xPackageType.is() );
+            if (xPackageType.is())
+                mediaType = xPackageType->getMediaType();
+
+            if (skip_registration &&
+                // xxx todo: additional parsing?
+                mediaType.matchIgnoreAsciiCase("application/vnd.sun.star.uno-component"))
+                continue;
+
+            bundle.push_back( xPackage );
+        }
+
+        if (mediaType.isEmpty() ||
+            // script.xlb, dialog.xlb can be met everywhere:
+            mediaType.matchIgnoreAsciiCase("application/vnd.sun.star.basic-library") ||
+            mediaType.matchIgnoreAsciiCase("application/vnd.sun.star.dialog-library"))
+        {
+            if (xRow->getBoolean( 2 /* IsFolder */ )) { // recurse into folder:
+                scanLegacyBundle(
+                    bundle, path, abortChannel, xCmdEnv, skip_registration );
+            }
+        }
+    }
+}
+
+OUString BackendImpl::PackageImpl::getDisplayName()
+{
+    if (m_bRemoved)
+        throw deployment::ExtensionRemovedException();
+
+    OUString sName = getDescriptionInfoset().getLocalizedDisplayName();
+    if (sName.isEmpty())
+        return m_displayName;
+    else
+        return sName;
+}
+
+std::vector<Reference<deployment::XPackage> >
+BackendImpl::PackageImpl::getPackagesFromDb(
+    Reference<ucb::XCommandEnvironment> const & xCmdEnv)
+{
+    std::vector<Reference<deployment::XPackage> > retVector;
+
+    for (auto const& item : m_dbData.items)
+    {
+        Reference<deployment::XPackage> xExtension =
+            bindBundleItem(item.first, item.second, true, m_identifier, xCmdEnv);
+        OSL_ASSERT(xExtension.is());
+        if (xExtension.is())
+            retVector.push_back(xExtension);
+    }
+
+    return retVector;
+}
+
+} // anon namespace
+
+
+Reference<deployment::XPackageRegistry> create(
+    Reference<deployment::XPackageRegistry> const & xRootRegistry,
+    OUString const & context, OUString const & cachePath,
+    Reference<XComponentContext> const & xComponentContext )
+{
+    Sequence<Any> args(cachePath.isEmpty() ? 1 : 3 );
+    auto pArgs = args.getArray();
+    pArgs[ 0 ] <<= context;
+    if (!cachePath.isEmpty()) {
+        pArgs[ 1 ] <<= cachePath;
+        pArgs[ 2 ] <<= false; // readOnly
+    }
+    return new BackendImpl( args, xComponentContext, xRootRegistry );
+}
+
+} // namespace dp_registry
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/script/dp_lib_container.cxx b/desktop/source/deployment/registry/script/dp_lib_container.cxx
new file mode 100644
index 000000000..3a6f30253
--- /dev/null
+++ b/desktop/source/deployment/registry/script/dp_lib_container.cxx
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+
+#include <strings.hrc>
+#include <dp_resource.h>
+#include <dp_shared.hxx>
+#include <dp_xml.h>
+#include "dp_lib_container.h"
+
+#include <rtl/ustring.hxx>
+#include <ucbhelper/content.hxx>
+#include <xmlscript/xmllib_imexp.hxx>
+
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend::script {
+
+namespace {
+    OUString StrCannotDetermineLibName() { return DpResId(RID_STR_CANNOT_DETERMINE_LIBNAME); }
+}
+
+OUString LibraryContainer::get_libname(
+    OUString const & url,
+    Reference<XCommandEnvironment> const & xCmdEnv,
+    Reference<XComponentContext> const & xContext )
+{
+    ::xmlscript::LibDescriptor import;
+    ::ucbhelper::Content ucb_content( url, xCmdEnv, xContext );
+    xml_parse( ::xmlscript::importLibrary( import ), ucb_content, xContext );
+
+    if (import.aName.isEmpty()) {
+        throw Exception( StrCannotDetermineLibName(),
+                         Reference<XInterface>() );
+    }
+    return import.aName;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/script/dp_lib_container.h b/desktop/source/deployment/registry/script/dp_lib_container.h
new file mode 100644
index 000000000..fbbedf866
--- /dev/null
+++ b/desktop/source/deployment/registry/script/dp_lib_container.h
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/uno/Reference.hxx>
+
+namespace com::sun::star {
+    namespace uno {
+        class XComponentContext;
+    }
+    namespace ucb {
+        class XCommandEnvironment;
+    }
+}
+
+
+namespace dp_registry::backend::script {
+
+
+class LibraryContainer
+{
+public:
+    static OUString get_libname(
+        OUString const & url,
+        css::uno::Reference<css::ucb::XCommandEnvironment> const & xCmdEnv,
+        css::uno::Reference<css::uno::XComponentContext> const & xContext );
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/script/dp_script.cxx b/desktop/source/deployment/registry/script/dp_script.cxx
new file mode 100644
index 000000000..47e41a364
--- /dev/null
+++ b/desktop/source/deployment/registry/script/dp_script.cxx
@@ -0,0 +1,480 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <strings.hrc>
+#include "dp_lib_container.h"
+#include <dp_backend.h>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include <ucbhelper/content.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <svl/inettype.hxx>
+#include <com/sun/star/util/XUpdatable.hpp>
+#include <com/sun/star/script/XLibraryContainer3.hpp>
+#include <memory>
+#include <string_view>
+
+#include "dp_scriptbackenddb.hxx"
+#include <cppuhelper/supportsservice.hxx>
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+
+namespace dp_registry::backend::script {
+namespace {
+
+typedef ::cppu::ImplInheritanceHelper<
+    ::dp_registry::backend::PackageRegistryBackend, util::XUpdatable > t_helper;
+
+class BackendImpl : public t_helper
+{
+    class PackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        const OUString m_scriptURL;
+        const OUString m_dialogURL;
+        OUString m_dialogName;
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    public:
+        PackageImpl(
+            ::rtl::Reference<BackendImpl> const & myBackend,
+            OUString const & url,
+            Reference<XCommandEnvironment> const &xCmdEnv,
+            OUString const & scriptURL, OUString const & dialogURL,
+            bool bRemoved, OUString const & identifier);
+    };
+    friend class PackageImpl;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    void addDataToDb(OUString const & url);
+    bool hasActiveEntry(std::u16string_view url);
+    void revokeEntryFromDb(std::u16string_view url);
+
+    const Reference<deployment::XPackageTypeInfo> m_xBasicLibTypeInfo;
+    const Reference<deployment::XPackageTypeInfo> m_xDialogLibTypeInfo;
+    Sequence< Reference<deployment::XPackageTypeInfo> > m_typeInfos;
+    std::unique_ptr<ScriptBackendDb> m_backendDb;
+public:
+    BackendImpl( Sequence<Any> const & args,
+                 Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XUpdatable
+    virtual void SAL_CALL update() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+
+};
+
+
+BackendImpl::PackageImpl::PackageImpl(
+    ::rtl::Reference<BackendImpl> const & myBackend,
+    OUString const & url,
+    Reference<XCommandEnvironment> const &xCmdEnv,
+    OUString const & scriptURL, OUString const & dialogURL, bool bRemoved,
+    OUString const & identifier)
+    : Package( myBackend, url,
+               OUString(), OUString(), // will be late-initialized
+               !scriptURL.isEmpty() ? myBackend->m_xBasicLibTypeInfo
+               : myBackend->m_xDialogLibTypeInfo, bRemoved, identifier),
+      m_scriptURL( scriptURL ),
+      m_dialogURL( dialogURL )
+{
+    // name, displayName:
+    if (!dialogURL.isEmpty()) {
+        m_dialogName = LibraryContainer::get_libname(
+            dialogURL, xCmdEnv, myBackend->getComponentContext() );
+    }
+    if (!scriptURL.isEmpty()) {
+        assert(m_name.pData);
+        m_name = LibraryContainer::get_libname(
+            scriptURL, xCmdEnv, myBackend->getComponentContext() );
+    }
+    else
+        m_name = m_dialogName;
+    m_displayName = m_name;
+}
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : t_helper( args, xComponentContext ),
+      m_xBasicLibTypeInfo( new Package::TypeInfo(
+                               "application/vnd.sun.star.basic-library",
+                               OUString() /* no file filter */,
+                               DpResId(RID_STR_BASIC_LIB)
+                               ) ),
+      m_xDialogLibTypeInfo( new Package::TypeInfo(
+                                "application/vnd.sun.star.dialog-library",
+                                OUString() /* no file filter */,
+                                DpResId(RID_STR_DIALOG_LIB)
+                                ) ),
+      m_typeInfos{ m_xBasicLibTypeInfo, m_xDialogLibTypeInfo }
+{
+    OSL_ASSERT( ! transientMode() );
+
+    if (!transientMode())
+    {
+        OUString dbFile = makeURL(getCachePath(), "backenddb.xml");
+        m_backendDb.reset(
+            new ScriptBackendDb(getComponentContext(), dbFile));
+    }
+
+}
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.script.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+void BackendImpl::addDataToDb(OUString const & url)
+{
+    if (m_backendDb)
+        m_backendDb->addEntry(url);
+}
+
+bool BackendImpl::hasActiveEntry(std::u16string_view url)
+{
+    if (m_backendDb)
+        return m_backendDb->hasActiveEntry(url);
+    return false;
+}
+
+// XUpdatable
+
+void BackendImpl::update()
+{
+    // Nothing to do here after fixing i70283!?
+}
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return m_typeInfos;
+}
+void BackendImpl::revokeEntryFromDb(std::u16string_view url)
+{
+    if (m_backendDb)
+        m_backendDb->revokeEntry(url);
+}
+
+void BackendImpl::packageRemoved(OUString const & url, OUString const & /*mediaType*/)
+{
+    if (m_backendDb)
+        m_backendDb->removeEntry(url);
+}
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_,
+    bool bRemoved, OUString const & identifier,
+    Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    OUString mediaType( mediaType_ );
+    if (mediaType.isEmpty())
+    {
+        // detect media-type:
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, url, xCmdEnv ) &&
+            ucbContent.isFolder())
+        {
+            // probe for script.xlb:
+            if (create_ucb_content(
+                    nullptr, makeURL( url, "script.xlb" ),
+                    xCmdEnv, false /* no throw */ ))
+                mediaType = "application/vnd.sun.star.basic-library";
+            // probe for dialog.xlb:
+            else if (create_ucb_content(
+                         nullptr, makeURL( url, "dialog.xlb" ),
+                         xCmdEnv, false /* no throw */ ))
+                mediaType = "application/vnd.sun.star.dialog-library";
+        }
+        if (mediaType.isEmpty())
+            throw lang::IllegalArgumentException(
+                StrCannotDetectMediaType() + url,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            OUString dialogURL( makeURL( url, "dialog.xlb" ) );
+            if (! create_ucb_content(
+                    nullptr, dialogURL, xCmdEnv, false /* no throw */ )) {
+                dialogURL.clear();
+            }
+
+            if (subType.equalsIgnoreAsciiCase("vnd.sun.star.basic-library"))
+            {
+                OUString scriptURL( makeURL( url, "script.xlb"));
+                if (! create_ucb_content(
+                        nullptr, scriptURL, xCmdEnv, false /* no throw */ )) {
+                    scriptURL.clear();
+                }
+
+                return new PackageImpl(
+                    this, url, xCmdEnv, scriptURL,
+                    dialogURL, bRemoved, identifier);
+            }
+            else if (subType.equalsIgnoreAsciiCase(
+                         "vnd.sun.star.dialog-library")) {
+                return new PackageImpl(
+                    this, url, xCmdEnv,
+                    OUString() /* no script lib */,
+                    dialogURL,
+                    bRemoved, identifier);
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+
+// Package
+BackendImpl * BackendImpl::PackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException(
+            "Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<PackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::PackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard & /* guard */,
+    ::rtl::Reference<AbortChannel> const & /* abortChannel */,
+    Reference<XCommandEnvironment> const & /* xCmdEnv */ )
+{
+    BackendImpl * that = getMyBackend();
+    Reference< deployment::XPackage > xThisPackage( this );
+
+    bool registered = that->hasActiveEntry(getURL());
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true /* IsPresent */,
+        beans::Ambiguous<sal_Bool>( registered, false /* IsAmbiguous */ ) );
+}
+
+void
+lcl_maybeRemoveScript(
+        bool const bExists,
+        OUString const& rName,
+        std::u16string_view rScriptURL,
+        Reference<css::script::XLibraryContainer3> const& xScriptLibs)
+{
+    if (bExists && xScriptLibs.is() && xScriptLibs->hasByName(rName))
+    {
+        const OUString sScriptUrl = xScriptLibs->getOriginalLibraryLinkURL(rName);
+        if (sScriptUrl == rScriptURL)
+            xScriptLibs->removeLibrary(rName);
+    }
+}
+
+bool
+lcl_maybeAddScript(
+        bool const bExists,
+        OUString const& rName,
+        OUString const& rScriptURL,
+        Reference<css::script::XLibraryContainer3> const& xScriptLibs)
+{
+    if (!bExists || !xScriptLibs)
+        return false;
+
+    bool bCanAdd = true;
+    if (xScriptLibs->hasByName(rName))
+    {
+        const OUString sOriginalUrl = xScriptLibs->getOriginalLibraryLinkURL(rName);
+        //We assume here that library names in extensions are unique, which may not be the case
+        //ToDo: If the script exist in another extension, then both extensions must have the
+        //same id
+        if (sOriginalUrl.match("vnd.sun.star.expand:$UNO_USER_PACKAGES_CACHE")
+            || sOriginalUrl.match("vnd.sun.star.expand:$UNO_SHARED_PACKAGES_CACHE")
+            || sOriginalUrl.match("vnd.sun.star.expand:$BUNDLED_EXTENSIONS")
+            || sOriginalUrl.match("$(INST)/share/basic/Access2Base/"))
+        {
+            xScriptLibs->removeLibrary(rName);
+            bCanAdd = true;
+        }
+        else
+        {
+            bCanAdd = false;
+        }
+    }
+
+    if (bCanAdd)
+    {
+        xScriptLibs->createLibraryLink(rName, rScriptURL, false);
+        return xScriptLibs->hasByName(rName);
+    }
+
+    return false;
+}
+
+void BackendImpl::PackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard & /* guard */,
+    bool doRegisterPackage,
+    bool startup,
+    ::rtl::Reference<AbortChannel> const & /* abortChannel */,
+    Reference<XCommandEnvironment> const & /* xCmdEnv */ )
+{
+    BackendImpl * that = getMyBackend();
+
+    Reference< deployment::XPackage > xThisPackage( this );
+    Reference<XComponentContext> const & xComponentContext = that->getComponentContext();
+
+    bool bScript = !m_scriptURL.isEmpty();
+    Reference<css::script::XLibraryContainer3> xScriptLibs;
+
+    bool bDialog = !m_dialogURL.isEmpty();
+    Reference<css::script::XLibraryContainer3> xDialogLibs;
+
+    bool bRunning = !startup && office_is_running();
+    if( bRunning )
+    {
+        if( bScript )
+        {
+            xScriptLibs.set(
+                xComponentContext->getServiceManager()->createInstanceWithContext(
+                    "com.sun.star.script.ApplicationScriptLibraryContainer",
+                    xComponentContext ), UNO_QUERY_THROW );
+        }
+
+        if( bDialog )
+        {
+            xDialogLibs.set(
+                xComponentContext->getServiceManager()->createInstanceWithContext(
+                    "com.sun.star.script.ApplicationDialogLibraryContainer",
+                    xComponentContext ), UNO_QUERY_THROW );
+        }
+    }
+    bool bRegistered = getMyBackend()->hasActiveEntry(getURL());
+    if( !doRegisterPackage )
+    {
+        //We cannot just call removeLibrary(name) because this could remove a
+        //script which was added by an extension in a different repository. For
+        //example, extension foo is contained in the bundled repository and then
+        //the user adds it to the user repository. The extension manager will
+        //then register the new script and revoke the script from the bundled
+        //extension. removeLibrary(name) would now remove the script from the
+        //user repository. That is, the script of the newly added user extension does
+        //not work anymore. Therefore we must check if the currently active
+        //script comes in fact from the currently processed extension.
+
+        if (bRegistered)
+        {
+            //we also prevent and live deployment at startup
+            if (!isRemoved() && !startup)
+            {
+                lcl_maybeRemoveScript(bScript, m_name, m_scriptURL, xScriptLibs);
+                lcl_maybeRemoveScript(bDialog, m_dialogName, m_dialogURL, xDialogLibs);
+            }
+            getMyBackend()->revokeEntryFromDb(getURL());
+            return;
+        }
+    }
+    if (bRegistered)
+        return;     // Already registered
+
+    // Update LibraryContainer
+    bool bScriptSuccess = false;
+    bool bDialogSuccess = false;
+    if (!startup)
+    {
+        //If there is a bundled extension, and the user installs the same extension
+        //then the script from the bundled extension must be removed. If this does not work
+        //then live deployment does not work for scripts.
+        bScriptSuccess = lcl_maybeAddScript(bScript, m_name, m_scriptURL, xScriptLibs);
+        bDialogSuccess = lcl_maybeAddScript(bDialog, m_dialogName, m_dialogURL, xDialogLibs);
+    }
+    bool bSuccess = bScript || bDialog;     // Something must have happened
+    if( bRunning )
+        if( (bScript && !bScriptSuccess) || (bDialog && !bDialogSuccess) )
+            bSuccess = false;
+
+    if (bSuccess)
+        getMyBackend()->addDataToDb(getURL());
+}
+
+} // anon namespace
+
+} // namespace dp_registry::backend::script
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_script_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::script::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/script/dp_scriptbackenddb.cxx b/desktop/source/deployment/registry/script/dp_scriptbackenddb.cxx
new file mode 100644
index 000000000..476f43953
--- /dev/null
+++ b/desktop/source/deployment/registry/script/dp_scriptbackenddb.cxx
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include "dp_scriptbackenddb.hxx"
+
+
+using namespace ::com::sun::star::uno;
+
+constexpr OUStringLiteral EXTENSION_REG_NS = u"http://openoffice.org/extensionmanager/script-registry/2010";
+constexpr OUStringLiteral NS_PREFIX = u"script";
+constexpr OUStringLiteral ROOT_ELEMENT_NAME = u"script-backend-db";
+constexpr OUStringLiteral KEY_ELEMENT_NAME = u"script";
+
+namespace dp_registry::backend::script {
+
+ScriptBackendDb::ScriptBackendDb(
+    Reference<XComponentContext> const &  xContext,
+    OUString const & url):RegisteredDb(xContext, url)
+{
+
+}
+
+OUString ScriptBackendDb::getDbNSName()
+{
+    return EXTENSION_REG_NS;
+}
+
+OUString ScriptBackendDb::getNSPrefix()
+{
+    return NS_PREFIX;
+}
+
+OUString ScriptBackendDb::getRootElementName()
+{
+    return ROOT_ELEMENT_NAME;
+}
+
+OUString ScriptBackendDb::getKeyElementName()
+{
+    return KEY_ELEMENT_NAME;
+}
+
+
+} // namespace dp_registry::backend::script
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/script/dp_scriptbackenddb.hxx b/desktop/source/deployment/registry/script/dp_scriptbackenddb.hxx
new file mode 100644
index 000000000..21d4b1f6b
--- /dev/null
+++ b/desktop/source/deployment/registry/script/dp_scriptbackenddb.hxx
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <dp_backenddb.hxx>
+#include <optional>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+namespace dp_registry::backend::script {
+
+/* The XML file stores the extensions which are currently registered.
+   They will be removed when they are revoked.
+ */
+class ScriptBackendDb: public dp_registry::backend::RegisteredDb
+{
+protected:
+    virtual OUString getDbNSName() override;
+
+    virtual OUString getNSPrefix() override;
+
+    virtual OUString getRootElementName() override;
+
+    virtual OUString getKeyElementName() override;
+
+
+public:
+
+    ScriptBackendDb( css::uno::Reference<css::uno::XComponentContext> const &  xContext,
+                        OUString const & url);
+};
+
+
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/sfwk/dp_parceldesc.cxx b/desktop/source/deployment/registry/sfwk/dp_parceldesc.cxx
new file mode 100644
index 000000000..530924a07
--- /dev/null
+++ b/desktop/source/deployment/registry/sfwk/dp_parceldesc.cxx
@@ -0,0 +1,103 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <dp_misc.h>
+#include "dp_parceldesc.hxx"
+
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+
+namespace dp_registry::backend::sfwk
+{
+
+
+// XDocumentHandler
+void SAL_CALL
+ParcelDescDocHandler::startDocument()
+{
+    m_bIsParsed = false;
+}
+
+void SAL_CALL
+ParcelDescDocHandler::endDocument()
+{
+    m_bIsParsed = true;
+}
+
+void SAL_CALL
+ParcelDescDocHandler::characters( const OUString & )
+{
+}
+
+void SAL_CALL
+ParcelDescDocHandler::ignorableWhitespace( const OUString & )
+{
+}
+
+void SAL_CALL
+ParcelDescDocHandler::processingInstruction(
+    const OUString &, const OUString & )
+{
+}
+
+void SAL_CALL
+ParcelDescDocHandler::setDocumentLocator(
+    const Reference< xml::sax::XLocator >& )
+{
+}
+
+void SAL_CALL
+ParcelDescDocHandler::startElement( const OUString& aName,
+    const Reference< xml::sax::XAttributeList > & xAttribs )
+{
+
+    dp_misc::TRACE("ParcelDescDocHandler::startElement() for " +
+        aName + "\n");
+    if ( !skipIndex )
+    {
+        if ( aName == "parcel" )
+        {
+            m_sLang = xAttribs->getValueByName( "language" );
+        }
+        ++skipIndex;
+    }
+    else
+    {
+        dp_misc::TRACE("ParcelDescDocHandler::startElement() skipping for "
+            + aName + "\n");
+    }
+
+}
+
+void SAL_CALL ParcelDescDocHandler::endElement( const OUString & aName )
+{
+    if ( skipIndex )
+    {
+        --skipIndex;
+        dp_misc::TRACE("ParcelDescDocHandler::endElement() skipping for "
+            + aName + "\n");
+    }
+}
+
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/sfwk/dp_parceldesc.hxx b/desktop/source/deployment/registry/sfwk/dp_parceldesc.hxx
new file mode 100644
index 000000000..6b5bde8bd
--- /dev/null
+++ b/desktop/source/deployment/registry/sfwk/dp_parceldesc.hxx
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <cppuhelper/implbase.hxx>
+
+#include <com/sun/star/xml/sax/XAttributeList.hpp>
+#include <com/sun/star/xml/sax/XDocumentHandler.hpp>
+
+namespace dp_registry::backend::sfwk
+{
+
+class ParcelDescDocHandler : public ::cppu::WeakImplHelper< css::xml::sax::XDocumentHandler >
+{
+private:
+    bool m_bIsParsed;
+    OUString m_sLang;
+    sal_Int32 skipIndex;
+public:
+    ParcelDescDocHandler():m_bIsParsed( false ), skipIndex( 0 ){}
+    const OUString& getParcelLanguage() const { return m_sLang; }
+    bool isParsed() const { return m_bIsParsed; }
+    // XDocumentHandler
+    virtual void SAL_CALL startDocument() override;
+
+    virtual void SAL_CALL endDocument() override;
+
+    virtual void SAL_CALL startElement( const OUString& aName,
+        const css::uno::Reference< css::xml::sax::XAttributeList > & xAttribs ) override;
+
+    virtual void SAL_CALL endElement( const OUString & aName ) override;
+
+    virtual void SAL_CALL characters( const OUString & aChars ) override;
+
+    virtual void SAL_CALL ignorableWhitespace( const OUString & aWhitespaces ) override;
+
+    virtual void SAL_CALL processingInstruction(
+        const OUString & aTarget, const OUString & aData ) override;
+
+    virtual void SAL_CALL setDocumentLocator(
+        const css::uno::Reference< css::xml::sax::XLocator >& xLocator ) override;
+};
+}
+
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/desktop/source/deployment/registry/sfwk/dp_sfwk.cxx b/desktop/source/deployment/registry/sfwk/dp_sfwk.cxx
new file mode 100644
index 000000000..b617d7fa4
--- /dev/null
+++ b/desktop/source/deployment/registry/sfwk/dp_sfwk.cxx
@@ -0,0 +1,378 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <strings.hrc>
+#include <dp_backend.h>
+#include <dp_misc.h>
+#include <dp_ucb.h>
+#include "dp_parceldesc.hxx"
+#include <rtl/uri.hxx>
+#include <ucbhelper/content.hxx>
+#include <svl/inettype.hxx>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/script/provider/theMasterScriptProviderFactory.hpp>
+#include <com/sun/star/xml/sax/Parser.hpp>
+#include <cppuhelper/supportsservice.hxx>
+#include <utility>
+
+
+using namespace ::dp_misc;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::ucb;
+using namespace ::com::sun::star::script;
+
+
+namespace dp_registry::backend::sfwk
+{
+
+namespace {
+
+class BackendImpl : public ::dp_registry::backend::PackageRegistryBackend
+{
+    class PackageImpl : public ::dp_registry::backend::Package
+    {
+        BackendImpl * getMyBackend() const;
+
+        Reference< container::XNameContainer > m_xNameCntrPkgHandler;
+        OUString m_descr;
+
+        void initPackageHandler();
+
+        // Package
+        virtual beans::Optional< beans::Ambiguous<sal_Bool> > isRegistered_(
+            ::osl::ResettableMutexGuard & guard,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+        virtual void processPackage_(
+            ::osl::ResettableMutexGuard & guard,
+            bool registerPackage,
+            bool startup,
+            ::rtl::Reference<AbortChannel> const & abortChannel,
+            Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    public:
+        PackageImpl(
+            ::rtl::Reference<BackendImpl> const & myBackend,
+            OUString const & url, OUString libType, bool bRemoved,
+            OUString const & identifier);
+        // XPackage
+        virtual OUString SAL_CALL getDescription() override;
+        virtual OUString SAL_CALL getLicenseText() override;
+    };
+    friend class PackageImpl;
+
+    // PackageRegistryBackend
+    virtual Reference<deployment::XPackage> bindPackage_(
+        OUString const & url, OUString const & mediaType,
+        bool bRemoved, OUString const & identifier,
+        Reference<XCommandEnvironment> const & xCmdEnv ) override;
+
+    const Reference<deployment::XPackageTypeInfo> m_xTypeInfo;
+
+
+public:
+    BackendImpl(
+        Sequence<Any> const & args,
+        Reference<XComponentContext> const & xComponentContext );
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XPackageRegistry
+    virtual Sequence< Reference<deployment::XPackageTypeInfo> > SAL_CALL
+    getSupportedPackageTypes() override;
+    virtual void SAL_CALL packageRemoved(OUString const & url, OUString const & mediaType) override;
+};
+
+}
+
+BackendImpl * BackendImpl::PackageImpl::getMyBackend() const
+{
+    BackendImpl * pBackend = static_cast<BackendImpl *>(m_myBackend.get());
+    if (nullptr == pBackend)
+    {
+        //May throw a DisposedException
+        check();
+        //We should never get here...
+        throw RuntimeException("Failed to get the BackendImpl",
+            static_cast<OWeakObject*>(const_cast<PackageImpl *>(this)));
+    }
+    return pBackend;
+}
+
+OUString BackendImpl::PackageImpl::getDescription()
+{
+    if (m_descr.isEmpty())
+        return Package::getDescription();
+    else
+        return m_descr;
+}
+
+OUString BackendImpl::PackageImpl::getLicenseText()
+{
+    return Package::getDescription();
+}
+
+BackendImpl::PackageImpl::PackageImpl(
+    ::rtl::Reference<BackendImpl> const & myBackend,
+    OUString const & url, OUString  libType, bool bRemoved,
+    OUString const & identifier)
+    : Package( myBackend, url, OUString(), OUString(),
+               myBackend->m_xTypeInfo, bRemoved, identifier),
+      m_descr(std::move(libType))
+{
+    initPackageHandler();
+
+    sal_Int32 segmEnd = url.getLength();
+    if ( url.endsWith("/") )
+        --segmEnd;
+    sal_Int32 segmStart = url.lastIndexOf( '/', segmEnd ) + 1;
+    if (segmStart < 0)
+        segmStart = 0;
+    // name and display name default the same:
+    m_displayName = ::rtl::Uri::decode(
+        url.copy( segmStart, segmEnd - segmStart ),
+        rtl_UriDecodeWithCharset, RTL_TEXTENCODING_UTF8 );
+    m_name = m_displayName;
+
+    dp_misc::TRACE("PackageImpl displayName is " + m_displayName);
+}
+
+
+BackendImpl::BackendImpl(
+    Sequence<Any> const & args,
+    Reference<XComponentContext> const & xComponentContext )
+    : PackageRegistryBackend( args, xComponentContext ),
+      m_xTypeInfo( new Package::TypeInfo(
+                       "application/vnd.sun.star.framework-script",
+                       OUString() /* no file filter */,
+                       "Scripting Framework Script Library"
+                       ) )
+{
+}
+
+
+// XServiceInfo
+OUString BackendImpl::getImplementationName()
+{
+    return "com.sun.star.comp.deployment.sfwk.PackageRegistryBackend";
+}
+
+sal_Bool BackendImpl::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > BackendImpl::getSupportedServiceNames()
+{
+    return { BACKEND_SERVICE_NAME };
+}
+
+// XPackageRegistry
+
+Sequence< Reference<deployment::XPackageTypeInfo> >
+BackendImpl::getSupportedPackageTypes()
+{
+    return Sequence< Reference<deployment::XPackageTypeInfo> >(&m_xTypeInfo, 1);
+}
+
+void BackendImpl::packageRemoved(OUString const & /*url*/, OUString const & /*mediaType*/)
+{
+}
+
+// PackageRegistryBackend
+
+Reference<deployment::XPackage> BackendImpl::bindPackage_(
+    OUString const & url, OUString const & mediaType_, bool bRemoved,
+    OUString const & identifier, Reference<XCommandEnvironment> const & xCmdEnv )
+{
+    OUString mediaType( mediaType_ );
+    if (mediaType.isEmpty())
+    {
+        // detect media-type:
+        ::ucbhelper::Content ucbContent;
+        if (create_ucb_content( &ucbContent, url, xCmdEnv ) &&
+            ucbContent.isFolder())
+        {
+            // probe for parcel-descriptor.xml:
+            if (create_ucb_content(
+                    nullptr, makeURL( url, "parcel-descriptor.xml" ),
+                    xCmdEnv, false /* no throw */ ))
+            {
+                mediaType = "application/vnd.sun.star.framework-script";
+            }
+        }
+        if (mediaType.isEmpty())
+            throw lang::IllegalArgumentException(
+                StrCannotDetectMediaType() + url,
+                static_cast<OWeakObject *>(this), static_cast<sal_Int16>(-1) );
+    }
+
+    OUString type, subType;
+    INetContentTypeParameterList params;
+    if (INetContentTypes::parse( mediaType, type, subType, &params ))
+    {
+        if (type.equalsIgnoreAsciiCase("application"))
+        {
+            if (subType.equalsIgnoreAsciiCase("vnd.sun.star.framework-script"))
+            {
+                OUString lang = "Script";
+                OUString sParcelDescURL = makeURL(
+                    url, "parcel-descriptor.xml" );
+
+                ::ucbhelper::Content ucb_content;
+
+                if (create_ucb_content( &ucb_content, sParcelDescURL,
+                        xCmdEnv, false /* no throw */ ))
+                {
+                    rtl::Reference<ParcelDescDocHandler> pHandler =
+                        new ParcelDescDocHandler();
+
+                    Reference<XComponentContext>
+                        xContext( getComponentContext() );
+
+                    Reference< xml::sax::XParser > xParser = xml::sax::Parser::create(xContext);
+
+                    xParser->setDocumentHandler( pHandler );
+                    xml::sax::InputSource source;
+                    source.aInputStream = ucb_content.openStream();
+                    source.sSystemId = ucb_content.getURL();
+                    xParser->parseStream( source );
+
+                    if ( pHandler->isParsed() )
+                    {
+                        lang = pHandler->getParcelLanguage();
+                    }
+                }
+
+                OUString sfwkLibType = DpResId( RID_STR_SFWK_LIB );
+                // replace %MACRONAME placeholder with language name
+                OUString MACRONAME( "%MACROLANG" );
+                sal_Int32 startOfReplace = sfwkLibType.indexOf( MACRONAME );
+                sal_Int32 charsToReplace = MACRONAME.getLength();
+                sfwkLibType = sfwkLibType.replaceAt( startOfReplace, charsToReplace, lang );
+                dp_misc::TRACE("******************************\n");
+                dp_misc::TRACE(" BackEnd detected lang = " + lang + "\n");
+                dp_misc::TRACE(" for url " + sParcelDescURL + "\n");
+                dp_misc::TRACE("******************************\n");
+                return new PackageImpl( this, url, sfwkLibType, bRemoved, identifier);
+            }
+        }
+    }
+    throw lang::IllegalArgumentException(
+        StrUnsupportedMediaType() + mediaType,
+        static_cast<OWeakObject *>(this),
+        static_cast<sal_Int16>(-1) );
+}
+
+
+void BackendImpl::PackageImpl:: initPackageHandler()
+{
+    if (m_xNameCntrPkgHandler.is())
+        return;
+
+    BackendImpl * that = getMyBackend();
+    Any aContext;
+
+    if ( that->m_eContext == Context::User )
+    {
+        aContext  <<= OUString("user");
+    }
+    else if ( that->m_eContext == Context::Shared )
+    {
+        aContext  <<= OUString("share");
+    }
+    else if ( that->m_eContext == Context::Bundled )
+    {
+        aContext  <<= OUString("bundled");
+    }
+    else
+    {
+        OSL_ASSERT( false );
+        // NOT supported at the moment // TODO
+    }
+
+    Reference< provider::XScriptProviderFactory > xFac =
+        provider::theMasterScriptProviderFactory::get( that->getComponentContext() );
+
+    Reference< container::XNameContainer > xName( xFac->createScriptProvider( aContext ), UNO_QUERY );
+    if ( xName.is() )
+    {
+        m_xNameCntrPkgHandler.set( xName );
+    }
+    // TODO what happens if above fails??
+}
+
+// Package
+
+beans::Optional< beans::Ambiguous<sal_Bool> >
+BackendImpl::PackageImpl::isRegistered_(
+    ::osl::ResettableMutexGuard &,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    return beans::Optional< beans::Ambiguous<sal_Bool> >(
+        true /* IsPresent */,
+        beans::Ambiguous<sal_Bool>(
+            m_xNameCntrPkgHandler.is() && m_xNameCntrPkgHandler->hasByName(
+                m_url ),
+            false /* IsAmbiguous */ ) );
+}
+
+
+void BackendImpl::PackageImpl::processPackage_(
+    ::osl::ResettableMutexGuard &,
+    bool doRegisterPackage,
+    bool /* startup */,
+    ::rtl::Reference<AbortChannel> const &,
+    Reference<XCommandEnvironment> const & )
+{
+    if ( !m_xNameCntrPkgHandler.is() )
+    {
+        dp_misc::TRACE("no package handler!!!!\n");
+        throw RuntimeException( "No package Handler " );
+    }
+
+    if (doRegisterPackage)
+    {
+        // will throw if it fails
+        m_xNameCntrPkgHandler->insertByName( m_url, Any( Reference< XPackage >(this) ) );
+
+    }
+    else // revokePackage()
+    {
+        m_xNameCntrPkgHandler->removeByName( m_url );
+    }
+}
+
+} // namespace dp_registry::backend::sfwk
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_deployment_sfwk_PackageRegistryBackend_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
+{
+    return cppu::acquire(new dp_registry::backend::sfwk::BackendImpl(args, context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */