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

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

20 files changed, 5801 insertions, 0 deletions

diff --git a/extensions/source/update/check/actionlistener.hxx b/extensions/source/update/check/actionlistener.hxx
new file mode 100644
index 000000000..8fdfd1565
--- /dev/null
+++ b/extensions/source/update/check/actionlistener.hxx
@@ -0,0 +1,39 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <salhelper/simplereferenceobject.hxx>
+
+class IActionListener : public virtual salhelper::SimpleReferenceObject
+{
+    public:
+
+    virtual void            cancel() = 0;
+    virtual void            download() = 0;
+    virtual void            install() = 0;
+    virtual void            pause() = 0;
+    virtual void            resume() = 0;
+    virtual void            closeAfterFailure() = 0;
+
+protected:
+    virtual ~IActionListener() override {}
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/download.cxx b/extensions/source/update/check/download.cxx
new file mode 100644
index 000000000..ba371bdee
--- /dev/null
+++ b/extensions/source/update/check/download.cxx
@@ -0,0 +1,427 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <curl/curl.h>
+
+#include <o3tl/string_view.hxx>
+#include <osl/diagnose.h>
+#include <osl/file.h>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+
+#include "download.hxx"
+
+namespace beans = com::sun::star::beans ;
+namespace container = com::sun::star::container ;
+namespace lang = com::sun::star::lang ;
+namespace uno = com::sun::star::uno ;
+
+namespace {
+
+struct OutData
+{
+    rtl::Reference< DownloadInteractionHandler >Handler;
+    OUString   File;
+    OUString   DestinationDir;
+    oslFileHandle   FileHandle;
+    sal_uInt64      Offset;
+    osl::Condition& StopCondition;
+    CURL *curl;
+
+    explicit OutData(osl::Condition& rCondition) : FileHandle(nullptr), Offset(0), StopCondition(rCondition), curl(nullptr) {};
+};
+
+}
+
+static void openFile( OutData& out )
+{
+    char * effective_url;
+    curl_easy_getinfo(out.curl, CURLINFO_EFFECTIVE_URL, &effective_url);
+
+    curl_off_t nDownloadSize;
+    curl_easy_getinfo(out.curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &nDownloadSize);
+
+    OString aURL(effective_url);
+
+    // ensure no trailing '/'
+    sal_Int32 nLen = aURL.getLength();
+    while( (nLen > 0) && ('/' == aURL[nLen-1]) )
+        aURL = aURL.copy(0, --nLen);
+
+    // extract file name last '/'
+    sal_Int32 nIndex = aURL.lastIndexOf('/');
+    if( nIndex > 0 )
+    {
+        out.File = out.DestinationDir
+            + OStringToOUString(aURL.subView(nIndex), RTL_TEXTENCODING_UTF8);
+
+        oslFileError rc;
+
+        // Give the user an overwrite warning if the target file exists
+        const sal_Int32 openFlags = osl_File_OpenFlag_Write | osl_File_OpenFlag_Create;
+        do
+        {
+            rc = osl_openFile(out.File.pData, &out.FileHandle, openFlags);
+
+            if( osl_File_E_EXIST == rc && ! out.Handler->downloadTargetExists(out.File) )
+            {
+                out.StopCondition.set();
+                break;
+            }
+
+        } while( osl_File_E_EXIST == rc );
+
+        if( osl_File_E_None == rc )
+            out.Handler->downloadStarted(out.File, static_cast<sal_Int64>(nDownloadSize));
+    }
+}
+
+
+static OString
+getStringValue(const uno::Reference< container::XNameAccess >& xNameAccess, const OUString& aName)
+{
+    OSL_ASSERT(xNameAccess->hasByName(aName));
+    uno::Any aValue = xNameAccess->getByName(aName);
+
+    return OUStringToOString(aValue.get<OUString>(), RTL_TEXTENCODING_UTF8);
+}
+
+
+static sal_Int32
+getInt32Value(const uno::Reference< container::XNameAccess >& xNameAccess,
+                    const OUString& aName)
+{
+    OSL_ASSERT(xNameAccess->hasByName(aName));
+    uno::Any aValue = xNameAccess->getByName(aName);
+
+    sal_Int32 n = -1;
+    aValue >>= n;
+    return n;
+}
+
+
+static size_t
+write_function( void *ptr, size_t size, size_t nmemb, void *stream )
+{
+    OutData *out = static_cast < OutData * > (stream);
+
+    if( nullptr == out->FileHandle )
+        openFile(*out);
+
+    sal_uInt64 nBytesWritten = 0;
+
+    if( nullptr != out->FileHandle )
+        osl_writeFile(out->FileHandle, ptr, size * nmemb, &nBytesWritten);
+
+    return static_cast<size_t>(nBytesWritten);
+}
+
+
+static int
+progress_callback( void *clientp, curl_off_t dltotal, curl_off_t dlnow, SAL_UNUSED_PARAMETER curl_off_t, SAL_UNUSED_PARAMETER curl_off_t)
+{
+    OutData *out = static_cast < OutData * > (clientp);
+
+    assert(out);
+
+    if (out && !out->StopCondition.check())
+    {
+        float fPercent = 0;
+        if ( dltotal + out->Offset )
+            fPercent = (dlnow + out->Offset) * 100 / (dltotal + out->Offset);
+        if( fPercent < 0 )
+            fPercent = 0;
+
+        // Do not report progress for redirection replies
+        long nCode;
+        curl_easy_getinfo(out->curl, CURLINFO_RESPONSE_CODE, &nCode);
+        if( (nCode != 302) && (nCode != 303) && (dltotal > 0) )
+            out->Handler->downloadProgressAt(static_cast<sal_Int8>(fPercent));
+
+        return 0;
+    }
+
+    // If stop condition is set, return non 0 value to abort
+    return -1;
+}
+
+
+void
+Download::getProxyForURL(std::u16string_view rURL, OString& rHost, sal_Int32& rPort) const
+{
+    uno::Reference< lang::XMultiServiceFactory > xConfigProvider(
+        css::configuration::theDefaultProvider::get( m_xContext ) );
+
+    beans::PropertyValue aProperty;
+    aProperty.Name  = "nodepath";
+    aProperty.Value <<= OUString("org.openoffice.Inet/Settings");
+
+    uno::Sequence< uno::Any > aArgumentList{ uno::Any(aProperty) };
+
+    uno::Reference< container::XNameAccess > xNameAccess(
+        xConfigProvider->createInstanceWithArguments(
+            "com.sun.star.configuration.ConfigurationAccess", aArgumentList ),
+        uno::UNO_QUERY_THROW );
+
+    OSL_ASSERT(xNameAccess->hasByName("ooInetProxyType"));
+    uno::Any aValue = xNameAccess->getByName("ooInetProxyType");
+
+    sal_Int32 nProxyType = aValue.get< sal_Int32 >();
+    if( 0 != nProxyType ) // type 0 means "direct connection to the internet
+    {
+        if( o3tl::starts_with(rURL, u"http:") )
+        {
+            rHost = getStringValue(xNameAccess, "ooInetHTTPProxyName");
+            rPort = getInt32Value(xNameAccess, "ooInetHTTPProxyPort");
+        }
+        else if( o3tl::starts_with(rURL, u"https:") )
+        {
+            rHost = getStringValue(xNameAccess, "ooInetHTTPSProxyName");
+            rPort = getInt32Value(xNameAccess, "ooInetHTTPSProxyPort");
+        }
+        else if( o3tl::starts_with(rURL, u"ftp:") )
+        {
+            rHost = getStringValue(xNameAccess, "ooInetFTPProxyName");
+            rPort = getInt32Value(xNameAccess, "ooInetFTPProxyPort");
+        }
+    }
+}
+
+
+static bool curl_run(std::u16string_view rURL, OutData& out, const OString& aProxyHost, sal_Int32 nProxyPort)
+{
+    /* Need to investigate further whether it is necessary to call
+     * curl_global_init or not - leave it for now (as the ftp UCB content
+     * provider does as well).
+     */
+
+    CURL * pCURL = curl_easy_init();
+    bool ret = false;
+
+    if( nullptr != pCURL )
+    {
+        out.curl = pCURL;
+
+        OString aURL(OUStringToOString(rURL, RTL_TEXTENCODING_UTF8));
+        (void)curl_easy_setopt(pCURL, CURLOPT_URL, aURL.getStr());
+
+        // abort on http errors
+        (void)curl_easy_setopt(pCURL, CURLOPT_FAILONERROR, 1);
+
+        // enable redirection
+        (void)curl_easy_setopt(pCURL, CURLOPT_FOLLOWLOCATION, 1);
+        // only allow redirect to https://
+#if (LIBCURL_VERSION_MAJOR > 7) || (LIBCURL_VERSION_MAJOR == 7 && LIBCURL_VERSION_MINOR >= 85)
+    curl_easy_setopt(pCURL, CURLOPT_REDIR_PROTOCOLS_STR, "https");
+#else
+    curl_easy_setopt(pCURL, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
+#endif
+
+        // write function
+        (void)curl_easy_setopt(pCURL, CURLOPT_WRITEDATA, &out);
+        (void)curl_easy_setopt(pCURL, CURLOPT_WRITEFUNCTION, &write_function);
+
+        // progress handler - Condition::check unfortunately is not defined const
+        (void)curl_easy_setopt(pCURL, CURLOPT_NOPROGRESS, 0);
+        (void)curl_easy_setopt(pCURL, CURLOPT_XFERINFOFUNCTION, &progress_callback);
+        (void)curl_easy_setopt(pCURL, CURLOPT_PROGRESSDATA, &out);
+
+        // proxy
+        (void)curl_easy_setopt(pCURL, CURLOPT_PROXY, aProxyHost.getStr());
+        (void)curl_easy_setopt(pCURL, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
+        if( -1 != nProxyPort )
+            (void)curl_easy_setopt(pCURL, CURLOPT_PROXYPORT, nProxyPort);
+
+        if( out.Offset > 0 )
+        {
+            // curl_off_t offset = nOffset; libcurl seems to be compiled with large
+            // file support (and we not) ..
+            sal_Int64 offset = static_cast<sal_Int64>(out.Offset);
+            (void)curl_easy_setopt(pCURL, CURLOPT_RESUME_FROM_LARGE, offset);
+        }
+
+        CURLcode cc = curl_easy_perform(pCURL);
+
+        // treat zero byte downloads as errors
+        if( nullptr == out.FileHandle )
+            openFile(out);
+
+        if( CURLE_OK == cc )
+        {
+            out.Handler->downloadFinished(out.File);
+            ret = true;
+        }
+
+        if ( CURLE_PARTIAL_FILE  == cc )
+        {
+            // this sometimes happens, when a user throws away his user data, but has already
+            // completed the download of an update.
+            curl_off_t nDownloadSize;
+            curl_easy_getinfo( pCURL, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &nDownloadSize );
+            if ( -1 == nDownloadSize )
+            {
+                out.Handler->downloadFinished(out.File);
+                ret = true;
+            }
+        }
+
+        // Avoid target file being removed
+        else if( (CURLE_ABORTED_BY_CALLBACK == cc) || out.StopCondition.check() )
+            ret = true;
+
+        // Only report errors when not stopped
+        else
+        {
+            OString aMessage("Unknown error");
+
+            const char * error_message = curl_easy_strerror(cc);
+            if( nullptr != error_message )
+                aMessage = error_message;
+
+            if ( CURLE_HTTP_RETURNED_ERROR == cc )
+            {
+                long nError;
+                curl_easy_getinfo( pCURL, CURLINFO_RESPONSE_CODE, &nError );
+
+                if ( 403 == nError )
+                    aMessage += " 403: Access denied!";
+                else if ( 404 == nError )
+                    aMessage += " 404: File not found!";
+                else if ( 416 == nError )
+                {
+                    // we got this error probably, because we already downloaded the file
+                    out.Handler->downloadFinished(out.File);
+                    ret = true;
+                }
+                else
+                {
+                    aMessage += ":error code = " + OString::number( nError ) + " !";
+                }
+            }
+            if ( !ret )
+                out.Handler->downloadStalled( OStringToOUString(aMessage, RTL_TEXTENCODING_UTF8) );
+        }
+
+        curl_easy_cleanup(pCURL);
+    }
+
+    return ret;
+}
+
+
+bool
+Download::start(const OUString& rURL, const OUString& rFile, const OUString& rDestinationDir)
+{
+    OSL_ASSERT( m_aHandler.is() );
+
+    OutData out(m_aCondition);
+    OUString aFile( rFile );
+
+    // when rFile is empty, there is no remembered file name. If there is already a file with the
+    // same name ask the user if she wants to resume a download or restart the download
+    if ( aFile.isEmpty() )
+    {
+        // GetFileName()
+        OUString aURL( rURL );
+        // ensure no trailing '/'
+        sal_Int32 nLen = aURL.getLength();
+        while( (nLen > 0) && ('/' == aURL[ nLen-1 ]) )
+            aURL = aURL.copy( 0, --nLen );
+
+        // extract file name last '/'
+        sal_Int32 nIndex = aURL.lastIndexOf('/');
+        aFile = rDestinationDir + aURL.subView( nIndex );
+
+        // check for existing file
+        oslFileError rc = osl_openFile( aFile.pData, &out.FileHandle, osl_File_OpenFlag_Write | osl_File_OpenFlag_Create );
+        osl_closeFile(out.FileHandle);
+        out.FileHandle = nullptr;
+
+        if( osl_File_E_EXIST == rc )
+        {
+            if ( m_aHandler->checkDownloadDestination( aURL.copy( nIndex+1 ) ) )
+            {
+                osl_removeFile( aFile.pData );
+                aFile.clear();
+            }
+            else
+                m_aHandler->downloadStarted( aFile, 0 );
+        }
+        else
+        {
+            osl_removeFile( aFile.pData );
+            aFile.clear();
+        }
+    }
+
+    out.File = aFile;
+    out.DestinationDir = rDestinationDir;
+    out.Handler = m_aHandler;
+
+    if( !aFile.isEmpty() )
+    {
+        oslFileError rc = osl_openFile(aFile.pData, &out.FileHandle, osl_File_OpenFlag_Write);
+
+        if( osl_File_E_None == rc )
+        {
+            // Set file pointer to the end of the file on resume
+            if( osl_File_E_None == osl_setFilePos(out.FileHandle, osl_Pos_End, 0) )
+            {
+                osl_getFilePos(out.FileHandle, &out.Offset);
+            }
+        }
+        else if( osl_File_E_NOENT == rc ) // file has been deleted meanwhile ..
+            out.File.clear();
+    }
+
+    OString aProxyHost;
+    sal_Int32    nProxyPort = -1;
+    getProxyForURL(rURL, aProxyHost, nProxyPort);
+
+    bool ret = curl_run(rURL, out, aProxyHost, nProxyPort);
+
+    if( nullptr != out.FileHandle )
+    {
+        osl_syncFile(out.FileHandle);
+        osl_closeFile(out.FileHandle);
+
+// #i90930# Don't remove already downloaded bits, when curl_run reports an error
+// because later calls might be successful
+//        if( ! ret )
+//            osl_removeFile(out.File.pData);
+    }
+
+    m_aCondition.reset();
+    return ret;
+}
+
+
+void
+Download::stop()
+{
+    m_aCondition.set();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/download.hxx b/extensions/source/update/check/download.hxx
new file mode 100644
index 000000000..12a11ddde
--- /dev/null
+++ b/extensions/source/update/check/download.hxx
@@ -0,0 +1,80 @@
+/* -*- 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 <com/sun/star/uno/XComponentContext.hpp>
+
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <osl/conditn.hxx>
+#include <salhelper/simplereferenceobject.hxx>
+
+struct DownloadInteractionHandler : public virtual salhelper::SimpleReferenceObject
+{
+    virtual bool checkDownloadDestination(const OUString& rFileName) = 0;
+
+    // called if the destination file already exists, but resume is false
+    virtual bool downloadTargetExists(const OUString& rFileName) = 0;
+
+    // called when curl reports an error
+    virtual void downloadStalled(const OUString& rErrorMessage) = 0;
+
+    // progress handler
+    virtual void downloadProgressAt(sal_Int8 nPercent) = 0;
+
+    // called on first progress notification
+    virtual void downloadStarted(const OUString& rFileName, sal_Int64 nFileSize) = 0;
+
+    // called when download has been finished
+    virtual void downloadFinished(const OUString& rFileName) = 0;
+
+protected:
+    virtual ~DownloadInteractionHandler() override {}
+};
+
+class Download
+{
+public:
+    Download(const css::uno::Reference<css::uno::XComponentContext>& xContext,
+             const rtl::Reference<DownloadInteractionHandler>& rHandler)
+        : m_xContext(xContext)
+        , m_aHandler(rHandler){};
+
+    // returns true when the content of rURL was successfully written to rLocalFile
+    bool start(const OUString& rURL, const OUString& rFile, const OUString& rDestinationDir);
+
+    // stops the download after the next write operation
+    void stop();
+
+protected:
+    // Determines the appropriate proxy settings for the given URL. Returns true if a proxy should be used
+    void getProxyForURL(std::u16string_view rURL, OString& rHost, sal_Int32& rPort) const;
+
+private:
+    osl::Condition m_aCondition;
+    const css::uno::Reference<css::uno::XComponentContext>& m_xContext;
+    const rtl::Reference<DownloadInteractionHandler> m_aHandler;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/onlinecheck.cxx b/extensions/source/update/check/onlinecheck.cxx
new file mode 100644
index 000000000..af6ade879
--- /dev/null
+++ b/extensions/source/update/check/onlinecheck.cxx
@@ -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 .
+ */
+
+#include <sal/types.h>
+#include <sal/macros.h>
+
+#include "onlinecheck.hxx"
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <wininet.h>
+
+// #i71984
+extern "C" bool WNT_hasInternetConnection()
+{
+    DWORD   dwFlags;
+    WCHAR   szConnectionName[1024];
+
+    __try {
+    bool fIsConnected = InternetGetConnectedStateExW(
+        &dwFlags,
+        szConnectionName,
+        SAL_N_ELEMENTS(szConnectionName),
+        0 );
+
+    return fIsConnected;
+
+    } __except( EXCEPTION_EXECUTE_HANDLER ) {
+        return false;
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/onlinecheck.hxx b/extensions/source/update/check/onlinecheck.hxx
new file mode 100644
index 000000000..fcfedcf48
--- /dev/null
+++ b/extensions/source/update/check/onlinecheck.hxx
@@ -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
+
+#include <sal/config.h>
+
+#if defined(_WIN32)
+extern "C" bool WNT_hasInternetConnection();
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/org/openoffice/Office/Addons.xcu b/extensions/source/update/check/org/openoffice/Office/Addons.xcu
new file mode 100644
index 000000000..29aa55e47
--- /dev/null
+++ b/extensions/source/update/check/org/openoffice/Office/Addons.xcu
@@ -0,0 +1,42 @@
+<?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 .
+-->
+<oor:component-data oor:name="Addons" oor:package="org.openoffice.Office" xmlns:install="http://openoffice.org/2004/installation" xmlns:oor="http://openoffice.org/2001/registry" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+    <node oor:name="AddonUI" install:module="onlineupdate">
+        <node oor:name="OfficeHelp">
+            <node oor:name="UpdateCheckJob" oor:op="replace">
+                <prop oor:name="URL" oor:type="xs:string">
+                    <value>vnd.sun.star.job:alias=UpdateCheck</value>
+                </prop>
+                <prop oor:name="ImageIdentifier" oor:type="xs:string">
+                    <value/>
+                </prop>
+                <prop oor:name="Title" oor:type="xs:string">
+                    <value xml:lang="en-US">~Check for Updates...</value>
+                </prop>
+                <prop oor:name="Target" oor:type="xs:string">
+                    <value>_self</value>
+                </prop>
+                <prop oor:name="Context" oor:type="xs:string">
+                    <value/>
+                </prop>
+            </node>
+        </node>
+    </node>
+</oor:component-data>
+
diff --git a/extensions/source/update/check/org/openoffice/Office/Jobs.xcu b/extensions/source/update/check/org/openoffice/Office/Jobs.xcu
new file mode 100644
index 000000000..58db40480
--- /dev/null
+++ b/extensions/source/update/check/org/openoffice/Office/Jobs.xcu
@@ -0,0 +1,66 @@
+<?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 .
+-->
+<oor:component-data oor:name="Jobs" oor:package="org.openoffice.Office" xmlns:install="http://openoffice.org/2004/installation" xmlns:oor="http://openoffice.org/2001/registry" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+    <node oor:name="Jobs" install:module="onlineupdate">
+        <node oor:name="UpdateCheck" oor:op="replace">
+            <prop oor:name="Service">
+                <value>com.sun.star.setup.UpdateCheck</value>
+            </prop>
+            <node oor:name="Arguments">
+                <prop oor:name="AutoCheckEnabled" oor:type="xs:boolean" oor:op="replace">
+                    <value>true</value>
+                </prop>
+                <prop oor:name="LastCheck" oor:type="xs:long" oor:op="replace">
+                    <value>0</value>
+                </prop>
+                <prop oor:name="CheckInterval" oor:type="xs:long" oor:op="replace">
+                    <!--
+                        Every Day   =   86400
+                        Every Week  =  604800
+                        Every Month = 2592000
+                    -->
+                    <value>604800</value>
+                </prop>
+                <prop oor:name="DownloadDestination" oor:type="xs:string" oor:op="replace">
+                    <value></value>
+                </prop>
+                <prop oor:name="AutoDownloadEnabled" oor:type="xs:boolean" oor:op="replace">
+                    <value>false</value>
+                </prop>
+                <prop oor:name="DownloadSupported" oor:type="xs:boolean" oor:op="replace">
+                    <value>true</value>
+                </prop>
+                <prop oor:name="DownloadPaused" oor:type="xs:boolean" oor:op="replace">
+                    <value>false</value>
+                </prop>
+                <prop oor:name="ExtendedUserAgent" oor:type="xs:boolean" oor:op="replace">
+                    <value>false</value>
+                </prop>
+            </node>
+        </node>
+    </node>
+    <node oor:name="Events" install:module="onlineupdate">
+        <node oor:name="onFirstVisibleTask" oor:op="fuse">
+            <node oor:name="JobList">
+                <node oor:name="UpdateCheck" oor:op="replace"/>
+            </node>
+        </node>
+    </node>
+</oor:component-data>
+
diff --git a/extensions/source/update/check/updatecheck.cxx b/extensions/source/update/check/updatecheck.cxx
new file mode 100644
index 000000000..8669f890e
--- /dev/null
+++ b/extensions/source/update/check/updatecheck.cxx
@@ -0,0 +1,1617 @@
+/* -*- 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 <comphelper/scopeguard.hxx>
+#include <config_folders.h>
+
+#include "updatecheck.hxx"
+
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/beans/XFastPropertySet.hpp>
+#include <com/sun/star/deployment/UpdateInformationProvider.hpp>
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/office/Quickstart.hpp>
+#include <com/sun/star/system/SystemShellExecute.hpp>
+#include <com/sun/star/system/SystemShellExecuteException.hpp>
+#include <com/sun/star/system/SystemShellExecuteFlags.hpp>
+#include <com/sun/star/task/XJob.hpp>
+#include <com/sun/star/task/XJobExecutor.hpp>
+
+#include <rtl/bootstrap.hxx>
+#include <osl/process.h>
+#include <osl/file.hxx>
+#include <sal/macros.h>
+#include <sal/log.hxx>
+#include <tools/diagnose_ex.h>
+
+#ifdef _WIN32
+#include <o3tl/safeCoInitUninit.hxx>
+#include <objbase.h>
+#endif
+
+#include "onlinecheck.hxx"
+#include "updateprotocol.hxx"
+#include "updatecheckconfig.hxx"
+
+namespace beans = com::sun::star::beans ;
+namespace deployment = com::sun::star::deployment ;
+namespace frame = com::sun::star::frame ;
+namespace lang = com::sun::star::lang ;
+namespace c3s = com::sun::star::system ;
+namespace task = com::sun::star::task ;
+namespace uno = com::sun::star::uno ;
+
+constexpr OUStringLiteral PROPERTY_TITLE = u"BubbleHeading";
+constexpr OUStringLiteral PROPERTY_TEXT = u"BubbleText";
+constexpr OUStringLiteral PROPERTY_SHOW_BUBBLE = u"BubbleVisible";
+constexpr OUStringLiteral PROPERTY_CLICK_HDL = u"MenuClickHDL";
+constexpr OUStringLiteral PROPERTY_SHOW_MENUICON = u"MenuIconVisible";
+
+// Returns the URL of the release note for the given position
+OUString getReleaseNote(const UpdateInfo& rInfo, sal_uInt8 pos, bool autoDownloadEnabled)
+{
+    for (auto const& elem : rInfo.ReleaseNotes)
+    {
+        if( pos == elem.Pos )
+        {
+            if( (pos > 2) || !autoDownloadEnabled || elem.URL2.isEmpty() )
+                return elem.URL;
+        }
+        else if( (pos == elem.Pos2) && ((1 == elem.Pos) || (2 == elem.Pos)) && autoDownloadEnabled )
+            return elem.URL2;
+    }
+
+    return OUString();
+}
+
+
+namespace
+{
+
+OUString getBuildId()
+{
+    OUString aPathVal("${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version") ":buildid}");
+    rtl::Bootstrap::expandMacros(aPathVal);
+    return aPathVal;
+}
+
+
+#if (defined LINUX || defined __sun)
+OUString getBaseInstallation()
+{
+    OUString aPathVal("$BRAND_BASE_DIR");
+    rtl::Bootstrap::expandMacros(aPathVal);
+    return aPathVal;
+}
+#endif
+
+
+bool isObsoleteUpdateInfo(std::u16string_view rBuildId)
+{
+    return rBuildId != getBuildId() && !rBuildId.empty();
+}
+
+
+OUString getImageFromFileName(const OUString& aFile)
+{
+#ifndef _WIN32
+    OUString aUnpackPath;
+    if( osl_getExecutableFile(&aUnpackPath.pData) == osl_Process_E_None )
+    {
+        sal_uInt32 lastIndex = aUnpackPath.lastIndexOf('/');
+        if ( lastIndex > 0 )
+        {
+            aUnpackPath = OUString::Concat(aUnpackPath.subView( 0, lastIndex+1 )) +
+                "unpack_update";
+        }
+
+        oslFileHandle hOut = nullptr;
+        oslProcess hProcess = nullptr;
+
+        OUString aSystemPath;
+        osl::File::getSystemPathFromFileURL(aFile, aSystemPath);
+
+        oslProcessError rc = osl_executeProcess_WithRedirectedIO(
+            aUnpackPath.pData,                                  // [in] Image name
+            &aSystemPath.pData, 1,                              // [in] Arguments
+            osl_Process_WAIT | osl_Process_NORMAL,              // [in] Options
+            nullptr,                                               // [in] Security
+            nullptr,                                               // [in] Working directory
+            nullptr, 0,                                            // [in] Environment variables
+            &hProcess,                                          // [out] Process handle
+            nullptr, &hOut, nullptr                                   // [out] File handles for redirected I/O
+        );
+
+        if( osl_Process_E_None == rc )
+        {
+            // Create a guard to ensure correct cleanup in its dtor in any case
+            comphelper::ScopeGuard g([hOut, hProcess] () {
+                osl_closeFile(hOut);
+                osl_freeProcessHandle(hProcess);
+            });
+
+            oslProcessInfo aInfo;
+            aInfo.Size = sizeof(oslProcessInfo);
+
+            if( osl_Process_E_None == osl_getProcessInfo(hProcess, osl_Process_EXITCODE, &aInfo) )
+            {
+                if( 0 == aInfo.Code )
+                {
+                    char       szBuffer[4096];
+                    sal_uInt64 nBytesRead = 0;
+                    const sal_uInt64 nBytesToRead = sizeof(szBuffer) - 1;
+
+                    OUString aImageName;
+                    while( osl_File_E_None == osl_readFile(hOut, szBuffer, nBytesToRead, &nBytesRead) )
+                    {
+                        char *pc = szBuffer + nBytesRead;
+                        do
+                        {
+                            *pc = '\0'; --pc;
+                        }
+                        while( ('\n' == *pc) || ('\r' == *pc) );
+
+                        aImageName += OUString(szBuffer, pc - szBuffer + 1, osl_getThreadTextEncoding());
+
+                        if( nBytesRead < nBytesToRead )
+                            break;
+                    }
+
+                    if( osl::FileBase::E_None == osl::FileBase::getFileURLFromSystemPath(aImageName, aImageName) )
+                        return aImageName;
+                }
+            }
+        }
+    }
+#endif
+
+    return aFile;
+}
+
+
+uno::Reference< beans::XPropertySet > createMenuBarUI(
+    const uno::Reference< uno::XComponentContext >& xContext,
+    const uno::Reference< task::XJob >& xJob)
+{
+    if( !xContext.is() )
+        throw uno::RuntimeException(
+            "UpdateCheckJob: empty component context", uno::Reference< uno::XInterface > () );
+
+    uno::Reference< lang::XMultiComponentFactory > xServiceManager(xContext->getServiceManager());
+    if( !xServiceManager.is() )
+        throw uno::RuntimeException(
+            "UpdateCheckJob: unable to obtain service manager from component context", uno::Reference< uno::XInterface > () );
+
+    uno::Reference< beans::XPropertySet > xMenuBarUI(
+            xServiceManager->createInstanceWithContext( "com.sun.star.setup.UpdateCheckUI", xContext ),
+            uno::UNO_QUERY_THROW);
+
+    xMenuBarUI->setPropertyValue( PROPERTY_CLICK_HDL, uno::Any( xJob ) );
+
+    return xMenuBarUI;
+}
+
+
+typedef sal_Bool (* OnlineCheckFunc) ();
+
+class UpdateCheckThread : public WorkerThread
+{
+
+public:
+    UpdateCheckThread( osl::Condition& rCondition,
+        const uno::Reference<uno::XComponentContext>& xContext,
+        rtl::Reference<UpdateCheck> const & controller );
+
+    virtual void SAL_CALL join() override;
+    virtual void SAL_CALL terminate() override;
+    virtual void cancel() override;
+
+    void cancelAsSoonAsPossible();
+
+protected:
+    virtual ~UpdateCheckThread() override;
+
+    virtual void SAL_CALL run() override;
+    virtual void SAL_CALL onTerminated() override;
+
+    /* Wrapper around checkForUpdates */
+    bool runCheck( bool & rbExtensionsChecked );
+
+private:
+
+    /* Used to avoid dialup login windows (on platforms we know how to double this) */
+    static bool hasInternetConnection()
+    {
+#ifdef _WIN32
+        return WNT_hasInternetConnection();
+#else
+        return true;
+#endif
+    }
+
+    /* Creates a new instance of UpdateInformationProvider and returns this instance */
+    uno::Reference<deployment::XUpdateInformationProvider> createProvider()
+    {
+        osl::MutexGuard aGuard(m_aMutex);
+        m_xProvider = deployment::UpdateInformationProvider::create(m_xContext);
+        return m_xProvider;
+    };
+
+    /* Returns the remembered instance of UpdateInformationProvider if any */
+    uno::Reference<deployment::XUpdateInformationProvider> getProvider()
+        { osl::MutexGuard aGuard(m_aMutex); return m_xProvider; };
+
+    /* Releases the remembered instance of UpdateInformationProvider if any */
+    void clearProvider()
+        { osl::MutexGuard aGuard(m_aMutex); m_xProvider.clear(); };
+
+    osl::Mutex      m_aMutex;
+
+protected:
+    osl::Condition& m_aCondition;
+
+private:
+    const uno::Reference<uno::XComponentContext> m_xContext;
+    uno::Reference<deployment::XUpdateInformationProvider> m_xProvider;
+    rtl::Reference<UpdateCheck> m_controller;
+    bool m_cancelAsSoonAsPossible;
+};
+
+
+class ManualUpdateCheckThread : public UpdateCheckThread
+{
+public:
+    ManualUpdateCheckThread( osl::Condition& rCondition, const uno::Reference<uno::XComponentContext>& xContext ) :
+        UpdateCheckThread(rCondition, xContext, {}) {};
+
+    virtual void SAL_CALL run() override;
+};
+
+
+class MenuBarButtonJob : public ::cppu::WeakImplHelper< task::XJob >
+{
+public:
+    explicit MenuBarButtonJob(const rtl::Reference< UpdateCheck >& rUpdateCheck);
+
+    // XJob
+    virtual uno::Any SAL_CALL execute(const uno::Sequence<beans::NamedValue>&) override;
+
+private:
+    rtl::Reference< UpdateCheck > m_aUpdateCheck;
+};
+
+class DownloadThread :  public WorkerThread
+{
+public:
+    DownloadThread(
+        osl::Condition& rCondition,
+        const uno::Reference<uno::XComponentContext>& xContext,
+        const rtl::Reference< DownloadInteractionHandler >& rHandler,
+        const OUString& rURL );
+
+    virtual void SAL_CALL run() override;
+    virtual void cancel() override;
+    virtual void SAL_CALL suspend() override;
+    virtual void SAL_CALL onTerminated() override;
+
+protected:
+    virtual ~DownloadThread() override;
+
+private:
+    osl::Condition& m_aCondition;
+    const uno::Reference<uno::XComponentContext> m_xContext;
+    const OUString m_aURL;
+    Download m_aDownload;
+};
+
+
+class ShutdownThread :  public osl::Thread
+{
+public:
+    explicit ShutdownThread(const uno::Reference<uno::XComponentContext>& xContext);
+
+    virtual void SAL_CALL run() override;
+    virtual void SAL_CALL onTerminated() override;
+
+protected:
+    virtual ~ShutdownThread() override;
+
+private:
+    osl::Condition m_aCondition;
+    const uno::Reference<uno::XComponentContext> m_xContext;
+};
+
+
+UpdateCheckThread::UpdateCheckThread( osl::Condition& rCondition,
+                                      const uno::Reference<uno::XComponentContext>& xContext,
+                                      rtl::Reference<UpdateCheck> const & controller ) :
+    m_aCondition(rCondition),
+    m_xContext(xContext),
+    m_controller(controller),
+    m_cancelAsSoonAsPossible(false)
+{
+    createSuspended();
+
+    // actually run the thread
+    resume();
+}
+
+
+UpdateCheckThread::~UpdateCheckThread()
+{
+}
+
+
+void SAL_CALL
+UpdateCheckThread::terminate()
+{
+    // Cancel potentially hanging http request ..
+    cancel();
+    // .. before terminating
+    osl::Thread::terminate();
+}
+
+
+void SAL_CALL
+UpdateCheckThread::join()
+{
+    uno::Reference< deployment::XUpdateInformationProvider > xProvider(getProvider());
+
+    // do not join during an update check until #i73893# is fixed
+    if( ! xProvider.is() )
+    {
+        osl::Thread::join();
+    }
+}
+
+
+void
+UpdateCheckThread::cancel()
+{
+    uno::Reference< deployment::XUpdateInformationProvider > xProvider(getProvider());
+
+    if( xProvider.is() )
+        xProvider->cancel();
+}
+
+void UpdateCheckThread::cancelAsSoonAsPossible() {
+    {
+        osl::MutexGuard g(m_aMutex);
+        m_cancelAsSoonAsPossible = true;
+    }
+    m_aCondition.set();
+}
+
+bool
+UpdateCheckThread::runCheck( bool & rbExtensionsChecked )
+{
+    bool ret = false;
+    UpdateState eUIState = UPDATESTATE_NO_UPDATE_AVAIL;
+
+    UpdateInfo aInfo;
+    rtl::Reference< UpdateCheck > aController(UpdateCheck::get());
+
+    if( checkForUpdates(aInfo, m_xContext, aController->getInteractionHandler(), createProvider()) )
+    {
+        aController->setUpdateInfo(aInfo);
+        eUIState = UpdateCheck::getUIState(aInfo);
+        ret = true;
+    }
+    else
+        aController->setCheckFailedState();
+
+    // We will only look for extension updates, when there is no 'check for office updates' dialog open
+    // and when there was no office update found
+    if ( ( eUIState != UPDATESTATE_UPDATE_AVAIL ) &&
+         ( eUIState != UPDATESTATE_UPDATE_NO_DOWNLOAD ) &&
+         !aController->isDialogShowing() &&
+         !rbExtensionsChecked )
+    {
+        bool bHasExtensionUpdates = checkForExtensionUpdates( m_xContext );
+        aController->setHasExtensionUpdates( bHasExtensionUpdates );
+        if ( bHasExtensionUpdates )
+            aController->setUIState( UPDATESTATE_EXT_UPD_AVAIL );
+        rbExtensionsChecked = true;
+    }
+
+    // joining with this thread is safe again
+    clearProvider();
+    return ret;
+}
+
+
+void SAL_CALL
+UpdateCheckThread::onTerminated()
+{
+    delete this;
+}
+
+
+void SAL_CALL
+UpdateCheckThread::run()
+{
+    osl_setThreadName("UpdateCheckThread");
+
+    TimeValue systime;
+    TimeValue nExtCheckTime;
+    osl_getSystemTime( &nExtCheckTime );
+
+    osl::Condition::Result aResult = osl::Condition::result_timeout;
+    TimeValue tv = { 10, 0 };
+
+    // Initial wait to avoid doing further time consuming tasks during start-up
+    aResult = m_aCondition.wait(&tv);
+    {
+        osl::MutexGuard g(m_aMutex);
+        if (m_cancelAsSoonAsPossible) {
+            goto done;
+        }
+    }
+
+    try {
+        bool bExtensionsChecked = false;
+
+        while( schedule() )
+        {
+            /* Use cases:
+             *  a) manual check requested from auto check thread - "last check" should not be checked (one time)
+             *     a1) manual check was requested in the middle of a running auto check,
+             *         condition is set
+             *     a2) manual check was requested while waiting for a retry,
+             *         condition is set
+             *     a3) manual check was requested while waiting for time to next
+             *         scheduled check elapsing, condition is set
+             *     a4) manual check was requested during initial wait, condition is set
+             *  b) check interval got changed, condition may be set - same sub-cases as a),
+             *     but "last check" should be honored
+             *  c) normal auto check mode, condition not set - "last check" should be honored
+             */
+
+            // Accessing const members without synchronization
+            rtl::Reference< UpdateCheck > aController(UpdateCheck::get());
+            rtl::Reference< UpdateCheckConfig > rModel = UpdateCheckConfig::get(m_xContext, *aController);
+
+            // FIXME: remember last & offset ?
+            sal_Int64 last   = rModel->getLastChecked();
+            sal_Int64 offset = rModel->getCheckInterval();
+
+            rModel.clear();
+
+            // last == 0 means check immediately
+            bool checkNow = last <= 0;
+
+            // Reset the condition to avoid busy loops
+            if( osl::Condition::result_ok == aResult )
+            {
+                m_aCondition.reset();
+                aResult = osl::Condition::result_timeout;
+                checkNow = aController->isDialogShowing();
+            }
+
+            if( ! checkNow )
+            {
+                osl_getSystemTime(&systime);
+
+                // Go back to sleep until time has elapsed
+                sal_Int64 next = last + offset;
+                if( last + offset > systime.Seconds )
+                {
+                    // This can not be > 32 Bit for now ..
+                    tv.Seconds = static_cast< sal_Int32 > (next - systime.Seconds);
+                    aResult = m_aCondition.wait(&tv);
+                    {
+                        osl::MutexGuard g(m_aMutex);
+                        if (m_cancelAsSoonAsPossible) {
+                            goto done;
+                        }
+                    }
+                    continue;
+                }
+            }
+
+            static sal_uInt8 n = 0;
+
+            if( ! hasInternetConnection() || ! runCheck( bExtensionsChecked ) )
+            {
+                // the extension update check should be independent from the office update check
+
+                osl_getSystemTime( &systime );
+                if ( nExtCheckTime.Seconds + offset < systime.Seconds )
+                    bExtensionsChecked = false;
+
+                // Increase next by 15, 60, .. minutes
+                static const sal_Int32 nRetryInterval[] = { 900, 3600, 14400, 86400 };
+
+                if( n < SAL_N_ELEMENTS(nRetryInterval) )
+                    ++n;
+
+                tv.Seconds = nRetryInterval[n-1];
+                aResult = m_aCondition.wait(&tv);
+                {
+                    osl::MutexGuard g(m_aMutex);
+                    if (m_cancelAsSoonAsPossible) {
+                        goto done;
+                    }
+                }
+            }
+            else // reset retry counter
+            {
+                n = 0;
+                bExtensionsChecked = false;
+            }
+        }
+    }
+
+    catch(const uno::Exception&) {
+        // Silently catch all errors
+        TOOLS_WARN_EXCEPTION("extensions.update", "Caught exception, thread terminated" );
+    }
+
+done:
+    if (m_controller.is()) {
+        m_controller->notifyUpdateCheckFinished();
+    }
+}
+
+
+void SAL_CALL
+ManualUpdateCheckThread::run()
+{
+    try {
+        bool bExtensionsChecked = false;
+        runCheck( bExtensionsChecked );
+        m_aCondition.reset();
+    }
+    catch(const uno::Exception&) {
+        // Silently catch all errors
+        TOOLS_WARN_EXCEPTION("extensions.update", "Caught exception, thread terminated" );
+    }
+}
+
+
+MenuBarButtonJob::MenuBarButtonJob(const rtl::Reference< UpdateCheck >& rUpdateCheck) :
+    m_aUpdateCheck(rUpdateCheck)
+{
+};
+
+
+uno::Any SAL_CALL
+MenuBarButtonJob::execute(const uno::Sequence<beans::NamedValue>& )
+{
+    if ( m_aUpdateCheck->shouldShowExtUpdDlg() )
+        m_aUpdateCheck->showExtensionDialog();
+    else
+        m_aUpdateCheck->showDialog();
+
+    return uno::Any();
+}
+
+
+DownloadThread::DownloadThread(osl::Condition& rCondition,
+                               const uno::Reference<uno::XComponentContext>& xContext,
+                               const rtl::Reference< DownloadInteractionHandler >& rHandler,
+                               const OUString& rURL) :
+    m_aCondition(rCondition),
+    m_xContext(xContext),
+    m_aURL(rURL),
+    m_aDownload(xContext, rHandler)
+{
+    createSuspended();
+}
+
+
+DownloadThread::~DownloadThread()
+{
+}
+
+
+void SAL_CALL
+DownloadThread::run()
+{
+    osl_setThreadName("DownloadThread");
+
+#ifdef _WIN32
+    int nNbCallCoInitializeExForReinit = 0;
+    // for SystemShellExecute
+    o3tl::safeCoInitializeEx(COINIT_APARTMENTTHREADED, nNbCallCoInitializeExForReinit);
+#endif
+
+    while( schedule() )
+    {
+        rtl::Reference< UpdateCheckConfig > rModel = UpdateCheckConfig::get(m_xContext);
+
+        OUString aLocalFile = rModel->getLocalFileName();
+        OUString aDownloadDest = rModel->getDownloadDestination();
+
+        // release config class for now
+        rModel.clear();
+
+        static sal_uInt8 n = 0;
+        if( ! m_aDownload.start(m_aURL, aLocalFile, aDownloadDest ) )
+        {
+            // retry every 15s unless the dialog is not visible
+            TimeValue tv;
+            tv.Seconds = 15;
+
+            if( ! UpdateCheck::get()->isDialogShowing() )
+            {
+                // Increase next by 1, 5, 15, 60, .. minutes
+                static const sal_Int16 nRetryInterval[] = { 60, 300, 900, 3600 };
+
+                if( n < SAL_N_ELEMENTS(nRetryInterval) )
+                    ++n;
+
+                tv.Seconds = nRetryInterval[n-1];
+            }
+            m_aCondition.wait(&tv);
+        }
+        else
+        {
+            // reset wait period after successful download
+            n=0;
+        }
+    }
+#ifdef _WIN32
+    o3tl::safeCoUninitializeReinit(COINIT_MULTITHREADED, nNbCallCoInitializeExForReinit);
+#endif
+}
+
+
+void DownloadThread::cancel()
+{
+    m_aDownload.stop();
+    resume();
+
+    rtl::Reference< UpdateCheck > aController(UpdateCheck::get());
+    aController->cancelDownload();
+}
+
+
+void SAL_CALL DownloadThread::suspend()
+{
+    osl::Thread::suspend();
+    m_aDownload.stop();
+}
+
+
+void SAL_CALL DownloadThread::onTerminated()
+{
+    delete this;
+}
+
+
+ShutdownThread::ShutdownThread( const uno::Reference<uno::XComponentContext>& xContext) :
+    m_xContext( xContext )
+{
+    create();
+}
+
+
+ShutdownThread::~ShutdownThread()
+{
+}
+
+
+void SAL_CALL
+ShutdownThread::run()
+{
+    osl_setThreadName("ShutdownThread");
+
+    TimeValue tv = { 0, 250 };
+
+    m_aCondition.wait(&tv);
+
+    // Tell QuickStarter not to veto ..
+    uno::Reference< css::beans::XFastPropertySet > xQuickStarter = css::office::Quickstart::createDefault(m_xContext);
+
+    xQuickStarter->setFastPropertyValue(0, uno::Any(false));
+
+    // Shutdown the office
+    uno::Reference< frame::XDesktop2 > xDesktop = frame::Desktop::create(m_xContext);
+
+    xDesktop->terminate();
+}
+
+
+void SAL_CALL ShutdownThread::onTerminated()
+{
+    delete this;
+}
+
+
+} // anonymous namespace
+
+UpdateCheck::UpdateCheck()
+    : m_eState(NOT_INITIALIZED)
+    , m_eUpdateState(UPDATESTATES_COUNT)
+    , m_pThread(nullptr)
+    , m_bHasExtensionUpdate(false)
+    , m_bShowExtUpdDlg(false)
+    , m_updateCheckRunning(false)
+{
+}
+
+UpdateCheck::~UpdateCheck() {}
+
+void
+UpdateCheck::initialize(const uno::Sequence< beans::NamedValue >& rValues,
+                        const uno::Reference<uno::XComponentContext>& xContext)
+{
+    std::scoped_lock aGuard(m_aMutex);
+
+    if( NOT_INITIALIZED == m_eState )
+    {
+        NamedValueByNameAccess aNameAccess(rValues);
+        UpdateCheckROModel aModel( aNameAccess );
+        m_xContext = xContext;
+
+        OUString aUpdateEntryVersion = aModel.getUpdateEntryVersion();
+
+        aModel.getUpdateEntry(m_aUpdateInfo);
+
+        bool obsoleteUpdateInfo = isObsoleteUpdateInfo(aUpdateEntryVersion);
+        bool bContinueDownload = false;
+        bool bDownloadAvailable = false;
+
+        m_bHasExtensionUpdate = checkForPendingUpdates( xContext );
+        m_bShowExtUpdDlg = false;
+
+        OUString aLocalFileName = aModel.getLocalFileName();
+
+        if( !aLocalFileName.isEmpty() )
+        {
+            bContinueDownload = true;
+
+            // Try to get the number of bytes already on disk
+            osl::DirectoryItem aDirectoryItem;
+            if( osl::DirectoryItem::E_None == osl::DirectoryItem::get(aLocalFileName, aDirectoryItem) )
+            {
+                osl::FileStatus aFileStatus(osl_FileStatus_Mask_FileSize);
+                if( osl::DirectoryItem::E_None == aDirectoryItem.getFileStatus(aFileStatus) )
+                {
+                    sal_Int64 nDownloadSize = aModel.getDownloadSize();
+                    sal_Int64 nFileSize = aFileStatus.getFileSize();
+
+                    if( nDownloadSize > 0 )
+                    {
+                        if ( nDownloadSize <= nFileSize ) // we have already downloaded everything
+                        {
+                            bContinueDownload = false;
+                            bDownloadAvailable = true;
+                            m_aImageName = getImageFromFileName( aLocalFileName );
+                        }
+                        else // Calculate initial percent value.
+                        {
+                            sal_Int32 nPercent = static_cast<sal_Int32>(100 * nFileSize / nDownloadSize);
+                            getUpdateHandler()->setProgress( nPercent );
+                        }
+                    }
+                }
+            }
+
+            if ( bContinueDownload )
+            {
+                bool downloadPaused = aModel.isDownloadPaused();
+
+                enableDownload(true, downloadPaused);
+                // coverity[lock_order : FALSE] - incorrect report of lock order error with std::recursive_mutex
+                setUIState(downloadPaused ? UPDATESTATE_DOWNLOAD_PAUSED : UPDATESTATE_DOWNLOADING);
+            }
+
+        }
+        if ( !bContinueDownload )
+        {
+            // We do this intentionally only if no download is in progress ..
+            if( obsoleteUpdateInfo )
+            {
+                // Bring-up release note for position 5 ..
+                const OUString aURL(getReleaseNote(m_aUpdateInfo, 5));
+                if( !aURL.isEmpty() )
+                    showReleaseNote(aURL);
+
+                // Data is outdated, probably due to installed update
+                rtl::Reference< UpdateCheckConfig > aConfig = UpdateCheckConfig::get( xContext, *this );
+                aConfig->clearUpdateFound();
+                aConfig->clearLocalFileName();
+
+
+                m_aUpdateInfo = UpdateInfo();
+                // Remove outdated release notes
+                storeReleaseNote( 1, OUString() );
+                storeReleaseNote( 2, OUString() );
+            }
+            else
+            {
+                enableAutoCheck(aModel.isAutoCheckEnabled());
+                if ( bDownloadAvailable )
+                    setUIState( UPDATESTATE_DOWNLOAD_AVAIL );
+                else
+                {
+                    // coverity[lock_order : FALSE] - incorrect report of lock order error with std::recursive_mutex
+                    setUIState(getUIState(m_aUpdateInfo));
+                }
+            }
+        }
+    }
+}
+
+
+void
+UpdateCheck::cancel()
+{
+    std::unique_lock aGuard(m_aMutex);
+
+    WorkerThread *pThread = m_pThread;
+    UpdateState eUIState = getUIState(m_aUpdateInfo);
+
+    aGuard.unlock();
+
+    if( nullptr != pThread )
+        pThread->cancel();
+
+    setUIState(eUIState);
+}
+
+
+void
+UpdateCheck::download()
+{
+    std::unique_lock aGuard(m_aMutex);
+    UpdateInfo aInfo(m_aUpdateInfo);
+    State eState = m_eState;
+    aGuard.unlock();
+
+    if (aInfo.Sources.empty())
+    {
+        SAL_WARN("extensions.update", "download called without source");
+        return;
+    }
+
+    if( aInfo.Sources[0].IsDirect )
+    {
+        // Ignore second click of a double click
+        if( DOWNLOADING != eState )
+        {
+            shutdownThread(true);
+
+            {
+                std::scoped_lock aGuard2(m_aMutex);
+                enableDownload(true);
+            }
+            setUIState(UPDATESTATE_DOWNLOADING);
+        }
+    }
+    else
+    {
+        showReleaseNote(aInfo.Sources[0].URL); // Display in browser
+    }
+}
+
+
+void
+UpdateCheck::install()
+{
+    std::scoped_lock aGuard(m_aMutex);
+
+    const uno::Reference< c3s::XSystemShellExecute > xShellExecute = c3s::SystemShellExecute::create( m_xContext );
+
+    try {
+        // Construct install command ??
+
+        // Store release note for position 3 and 4
+        OUString aURL(getReleaseNote(m_aUpdateInfo, 3));
+        storeReleaseNote(1, aURL);
+
+        aURL = getReleaseNote(m_aUpdateInfo, 4);
+        storeReleaseNote(2, aURL);
+
+        OUString aInstallImage(m_aImageName);
+        osl::FileBase::getSystemPathFromFileURL(aInstallImage, aInstallImage);
+
+        sal_Int32 nFlags;
+#if (defined LINUX || defined __sun)
+        nFlags = 42;
+        OUString aParameter = getBaseInstallation();
+        if( !aParameter.isEmpty() )
+            osl::FileBase::getSystemPathFromFileURL(aParameter, aParameter);
+
+        aParameter += " &";
+#else
+        nFlags = c3s::SystemShellExecuteFlags::DEFAULTS;
+        OUString const aParameter;
+#endif
+
+        rtl::Reference< UpdateCheckConfig > rModel = UpdateCheckConfig::get( m_xContext );
+        rModel->clearLocalFileName();
+
+        xShellExecute->execute(aInstallImage, aParameter, nFlags);
+        new ShutdownThread( m_xContext );
+    } catch(const uno::Exception&) {
+        m_aUpdateHandler->setErrorMessage( m_aUpdateHandler->getDefaultInstErrMsg() );
+    }
+}
+
+
+void
+UpdateCheck::pause()
+{
+    std::unique_lock aGuard(m_aMutex);
+
+    if( nullptr != m_pThread )
+        m_pThread->suspend();
+
+    rtl::Reference< UpdateCheckConfig > rModel = UpdateCheckConfig::get(m_xContext);
+    aGuard.unlock();
+
+    rModel->storeDownloadPaused(true);
+    setUIState(UPDATESTATE_DOWNLOAD_PAUSED);
+}
+
+
+void
+UpdateCheck::resume()
+{
+    std::unique_lock aGuard(m_aMutex);
+
+    if( nullptr != m_pThread )
+        m_pThread->resume();
+
+    rtl::Reference< UpdateCheckConfig > rModel = UpdateCheckConfig::get(m_xContext);
+    aGuard.unlock();
+
+    rModel->storeDownloadPaused(false);
+    setUIState(UPDATESTATE_DOWNLOADING);
+}
+
+
+void
+UpdateCheck::closeAfterFailure()
+{
+    std::unique_lock aGuard(m_aMutex);
+
+    if ( ( m_eState == DISABLED ) || ( m_eState == CHECK_SCHEDULED ) )
+    {
+        const UpdateState eUIState = getUIState( m_aUpdateInfo );
+        aGuard.unlock();
+        setUIState( eUIState, true );
+    }
+}
+
+void UpdateCheck::notifyUpdateCheckFinished() {
+    std::scoped_lock l(m_aMutex);
+    m_updateCheckRunning = false;
+    m_updateCheckFinished.notify_all();
+}
+
+void UpdateCheck::waitForUpdateCheckFinished() {
+    UpdateCheckThread * thread;
+    {
+        std::scoped_lock l(m_aMutex);
+        thread = dynamic_cast<UpdateCheckThread *>(m_pThread);
+    }
+    if (thread != nullptr) {
+        thread->cancelAsSoonAsPossible();
+    }
+    for (;;) {
+        std::unique_lock lock(m_aMutex);
+        if (!m_updateCheckRunning) {
+            return;
+        }
+        m_updateCheckFinished.wait(lock);
+    }
+}
+
+void
+UpdateCheck::shutdownThread(bool join)
+{
+    std::unique_lock aGuard(m_aMutex);
+
+    // copy thread object pointer to stack
+    osl::Thread *pThread = m_pThread;
+    m_pThread = nullptr;
+    aGuard.unlock();
+
+    if( nullptr != pThread )
+    {
+        pThread->terminate();
+        if( join )
+        {
+            m_aCondition.set();
+            pThread->join();
+            m_aCondition.reset();
+        }
+    }
+}
+
+
+void
+UpdateCheck::enableAutoCheck(bool enable)
+{
+    if( enable )
+    {
+        m_updateCheckRunning = true;
+        m_pThread = new UpdateCheckThread(m_aCondition, m_xContext, this);
+    }
+
+    m_eState = enable ? CHECK_SCHEDULED : DISABLED;
+}
+
+
+void
+UpdateCheck::enableDownload(bool enable, bool paused)
+{
+    OSL_ASSERT(nullptr == m_pThread);
+
+    if( enable )
+    {
+        m_pThread = new DownloadThread(m_aCondition, m_xContext, this, m_aUpdateInfo.Sources[0].URL );
+        State eState = DISABLED;
+        if( !paused )
+        {
+            eState = DOWNLOADING;
+            m_pThread->resume();
+        }
+        else
+            eState = DOWNLOAD_PAUSED;
+
+        m_eState = eState;
+    }
+    else {
+        enableAutoCheck(UpdateCheckConfig::get(m_xContext)->isAutoCheckEnabled());
+    }
+
+}
+
+
+bool
+UpdateCheck::downloadTargetExists(const OUString& rFileName)
+{
+    std::unique_lock aGuard(m_aMutex);
+
+    rtl::Reference< UpdateHandler > aUpdateHandler(getUpdateHandler());
+    UpdateState eUIState = UPDATESTATE_DOWNLOADING;
+
+    bool cont = false;
+
+    if( aUpdateHandler->isVisible() )
+    {
+        cont = aUpdateHandler->showOverwriteWarning();
+        if( cont )
+        {
+            if( osl_File_E_None != osl_removeFile(rFileName.pData) )
+            {
+                // FIXME: error message
+                cont = false;
+            }
+        }
+        else
+            eUIState = getUIState(m_aUpdateInfo);
+    }
+    else
+    {
+        m_aImageName = getImageFromFileName(rFileName);
+        eUIState = UPDATESTATE_DOWNLOAD_AVAIL;
+    }
+
+    if( !cont )
+    {
+        shutdownThread(false);
+        enableDownload(false);
+
+        aGuard.unlock();
+        setUIState(eUIState);
+    }
+
+    return cont;
+}
+
+
+bool UpdateCheck::checkDownloadDestination( const OUString& rFileName )
+{
+    std::scoped_lock aGuard(m_aMutex);
+
+    rtl::Reference< UpdateHandler > aUpdateHandler( getUpdateHandler() );
+
+    bool bReload = false;
+
+    if( aUpdateHandler->isVisible() )
+    {
+        bReload = aUpdateHandler->showOverwriteWarning( rFileName );
+    }
+
+    return bReload;
+}
+
+
+void
+UpdateCheck::downloadStalled(const OUString& rErrorMessage)
+{
+    std::unique_lock aGuard(m_aMutex);
+    rtl::Reference< UpdateHandler > aUpdateHandler(getUpdateHandler());
+    aGuard.unlock();
+
+    aUpdateHandler->setErrorMessage(rErrorMessage);
+    setUIState(UPDATESTATE_ERROR_DOWNLOADING);
+}
+
+
+void
+UpdateCheck::downloadProgressAt(sal_Int8 nPercent)
+{
+    std::unique_lock aGuard(m_aMutex);
+    rtl::Reference< UpdateHandler > aUpdateHandler(getUpdateHandler());
+    aGuard.unlock();
+
+    aUpdateHandler->setProgress(nPercent);
+    setUIState(UPDATESTATE_DOWNLOADING);
+}
+
+
+void
+UpdateCheck::downloadStarted(const OUString& rLocalFileName, sal_Int64 nFileSize)
+{
+    if ( nFileSize > 0 )
+    {
+        std::scoped_lock aGuard(m_aMutex);
+
+        rtl::Reference< UpdateCheckConfig > aModel(UpdateCheckConfig::get(m_xContext));
+        aModel->storeLocalFileName(rLocalFileName, nFileSize);
+
+        // Bring-up release note for position 1 ..
+        const OUString aURL(getReleaseNote(m_aUpdateInfo, 1, aModel->isAutoDownloadEnabled()));
+        if( !aURL.isEmpty() )
+            showReleaseNote(aURL);
+    }
+}
+
+
+void
+UpdateCheck::downloadFinished(const OUString& rLocalFileName)
+{
+    std::unique_lock aGuard(m_aMutex);
+
+    // no more retries
+    m_pThread->terminate();
+
+    m_aImageName = getImageFromFileName(rLocalFileName);
+    UpdateInfo aUpdateInfo(m_aUpdateInfo);
+
+    aGuard.unlock();
+    setUIState(UPDATESTATE_DOWNLOAD_AVAIL);
+
+    // Bring-up release note for position 2 ..
+    rtl::Reference< UpdateCheckConfig > rModel = UpdateCheckConfig::get( m_xContext );
+    const OUString aURL(getReleaseNote(aUpdateInfo, 2, rModel->isAutoDownloadEnabled()));
+    if( !aURL.isEmpty() )
+        showReleaseNote(aURL);
+}
+
+
+void
+UpdateCheck::cancelDownload()
+{
+    shutdownThread(true);
+
+    std::scoped_lock aGuard(m_aMutex);
+    enableDownload(false);
+
+    rtl::Reference< UpdateCheckConfig > rModel = UpdateCheckConfig::get(m_xContext);
+
+    OUString aLocalFile(rModel->getLocalFileName());
+    rModel->clearLocalFileName();
+    rModel->storeDownloadPaused(false);
+
+    if( isObsoleteUpdateInfo(rModel->getUpdateEntryVersion()) )
+    {
+        rModel->clearUpdateFound(); // This wasn't done during init yet ..
+        m_aUpdateInfo = UpdateInfo();
+    }
+
+    /*oslFileError rc =*/ osl_removeFile(aLocalFile.pData);
+    // FIXME: error handling ..
+
+}
+
+
+void
+UpdateCheck::showDialog(bool forceCheck)
+{
+    std::unique_lock aGuard(m_aMutex);
+
+    bool update_found = !m_aUpdateInfo.BuildId.isEmpty();
+    bool bSetUIState = ! m_aUpdateHandler.is();
+
+    UpdateState eDialogState = UPDATESTATES_COUNT;
+
+    switch( m_eState )
+    {
+    case DISABLED:
+    case CHECK_SCHEDULED:
+        if( forceCheck || ! update_found ) // Run check when forced or if we did not find an update yet
+        {
+            eDialogState = UPDATESTATE_CHECKING;
+            bSetUIState = true;
+        }
+        else if(m_aUpdateInfo.Sources[0].IsDirect)
+            eDialogState = UPDATESTATE_UPDATE_AVAIL;
+        else
+            eDialogState = UPDATESTATE_UPDATE_NO_DOWNLOAD;
+        break;
+
+    case DOWNLOADING:
+        eDialogState = UPDATESTATE_DOWNLOADING;
+        break;
+
+    case DOWNLOAD_PAUSED:
+        eDialogState = UPDATESTATE_DOWNLOAD_PAUSED;
+        break;
+
+    case NOT_INITIALIZED:
+        OSL_ASSERT( false );
+        break;
+    }
+
+    if( bSetUIState )
+    {
+        aGuard.unlock();
+        setUIState(eDialogState, true); // suppress bubble as Dialog will be visible soon
+        aGuard.lock();
+    }
+
+    getUpdateHandler()->setVisible();
+
+    // Run check in separate thread ..
+    if( UPDATESTATE_CHECKING == eDialogState )
+    {
+        if( DISABLED == m_eState )
+        {
+            // destructs itself when done, not cancellable for now ..
+            new ManualUpdateCheckThread(m_aCondition, m_xContext);
+        }
+
+        m_aCondition.set();
+    }
+}
+
+
+void
+UpdateCheck::setUpdateInfo(const UpdateInfo& aInfo)
+{
+    std::unique_lock aGuard(m_aMutex);
+
+    bool bSuppressBubble = aInfo.BuildId == m_aUpdateInfo.BuildId;
+    m_aUpdateInfo = aInfo;
+
+    OSL_ASSERT(DISABLED == m_eState || CHECK_SCHEDULED == m_eState);
+
+    // Ignore leading non direct download if we get direct ones
+    std::vector< DownloadSource >::iterator iter = std::find_if(m_aUpdateInfo.Sources.begin(), m_aUpdateInfo.Sources.end(),
+        [](const DownloadSource& rSource) { return rSource.IsDirect; });
+
+    if( (iter != m_aUpdateInfo.Sources.begin()) &&
+        (iter != m_aUpdateInfo.Sources.end()) &&
+        iter->IsDirect )
+    {
+        m_aUpdateInfo.Sources.erase(m_aUpdateInfo.Sources.begin(), --iter);
+    }
+
+    rtl::Reference< UpdateCheckConfig > rModel = UpdateCheckConfig::get(m_xContext, *this);
+    OSL_ASSERT( rModel.is() );
+
+    // Decide whether to use alternate release note pos ..
+    bool autoDownloadEnabled = rModel->isAutoDownloadEnabled();
+
+    for (auto & elem : m_aUpdateInfo.ReleaseNotes)
+    {
+        if( ((1 == elem.Pos) || (2 == elem.Pos)) && autoDownloadEnabled && !elem.URL2.isEmpty())
+        {
+            elem.URL = elem.URL2;
+            elem.URL2.clear();
+            elem.Pos = elem.Pos2;
+            elem.Pos2 = 0;
+        }
+    }
+
+    // do not move below store/clear ..
+    rModel->updateLastChecked();
+
+    UpdateState eUIState;
+    if( !m_aUpdateInfo.Sources.empty() )
+    {
+        rModel->storeUpdateFound(aInfo, getBuildId());
+
+        if( m_aUpdateInfo.Sources[0].IsDirect )
+        {
+            eUIState = UPDATESTATE_UPDATE_AVAIL;
+
+            if( rModel->isAutoDownloadEnabled() )
+            {
+                shutdownThread(false);
+                eUIState = UPDATESTATE_DOWNLOADING;
+                enableDownload(true);
+            }
+        }
+        else
+            eUIState = UPDATESTATE_UPDATE_NO_DOWNLOAD;
+    }
+    else
+    {
+        eUIState = UPDATESTATE_NO_UPDATE_AVAIL;
+        rModel->clearUpdateFound();
+    }
+
+    aGuard.unlock();
+    setUIState(eUIState, bSuppressBubble);
+}
+
+
+void
+UpdateCheck::setCheckFailedState()
+{
+    setUIState(UPDATESTATE_ERROR_CHECKING);
+}
+
+
+void UpdateCheck::handleMenuBarUI( const rtl::Reference< UpdateHandler >& rUpdateHandler,
+                                   UpdateState& eState,
+                                   bool suppressBubble )
+{
+    uno::Reference<beans::XPropertySet> xMenuBarUI( m_xMenuBarUI );
+
+    if ( ( UPDATESTATE_NO_UPDATE_AVAIL == eState ) && m_bHasExtensionUpdate )
+        eState = UPDATESTATE_EXT_UPD_AVAIL;
+
+    if ( UPDATESTATE_EXT_UPD_AVAIL == eState )
+        m_bShowExtUpdDlg = true;
+    else
+        m_bShowExtUpdDlg = false;
+
+    if( xMenuBarUI.is() )
+    {
+        if( UPDATESTATE_NO_UPDATE_AVAIL == eState )
+        {
+            xMenuBarUI->setPropertyValue( PROPERTY_SHOW_MENUICON, uno::Any(false) );
+        }
+        else
+        {
+            xMenuBarUI->setPropertyValue( PROPERTY_TITLE, uno::Any(rUpdateHandler->getBubbleTitle(eState)) );
+            xMenuBarUI->setPropertyValue( PROPERTY_TEXT, uno::Any(rUpdateHandler->getBubbleText(eState)) );
+
+            if( ! suppressBubble && ( ! rUpdateHandler->isVisible() || rUpdateHandler->isMinimized() ) )
+                xMenuBarUI->setPropertyValue( PROPERTY_SHOW_BUBBLE, uno::Any( true ) );
+
+            if( UPDATESTATE_CHECKING != eState )
+                xMenuBarUI->setPropertyValue( PROPERTY_SHOW_MENUICON, uno::Any(true) );
+        }
+    }
+}
+
+
+void UpdateCheck::setUIState(UpdateState eState, bool suppressBubble)
+{
+    std::unique_lock aGuard(m_aMutex);
+
+    if( ! m_xMenuBarUI.is() &&
+        (DISABLED != m_eState) &&
+        ( m_bHasExtensionUpdate || (UPDATESTATE_NO_UPDATE_AVAIL != eState)) &&
+        (UPDATESTATE_CHECKING != eState) &&
+        (UPDATESTATE_ERROR_CHECKING != eState)
+    )
+    {
+        m_xMenuBarUI = createMenuBarUI(m_xContext, new MenuBarButtonJob(this));
+    }
+
+    // Show bubble only when the status has changed
+    if ( eState == m_eUpdateState )
+        suppressBubble = true;
+    else
+        m_eUpdateState = eState;
+
+    rtl::Reference<UpdateHandler> aUpdateHandler(getUpdateHandler());
+    OSL_ASSERT( aUpdateHandler.is() );
+
+    UpdateInfo aUpdateInfo(m_aUpdateInfo);
+    OUString aImageName(m_aImageName);
+
+    aGuard.unlock();
+
+    handleMenuBarUI( aUpdateHandler, eState, suppressBubble );
+
+    if( (UPDATESTATE_UPDATE_AVAIL == eState)
+     || (UPDATESTATE_DOWNLOAD_PAUSED == eState)
+     || (UPDATESTATE_DOWNLOADING == eState) )
+    {
+        uno::Reference< uno::XComponentContext > xContext(m_xContext);
+
+        OUString aDownloadDestination =
+            UpdateCheckConfig::get(xContext, this)->getDownloadDestination();
+
+        osl_getSystemPathFromFileURL(aDownloadDestination.pData, &aDownloadDestination.pData);
+
+        aUpdateHandler->setDownloadPath(aDownloadDestination);
+    }
+    else if( UPDATESTATE_DOWNLOAD_AVAIL == eState )
+    {
+        aUpdateHandler->setDownloadFile(aImageName);
+    }
+
+    aUpdateHandler->setDescription(aUpdateInfo.Description);
+    aUpdateHandler->setNextVersion(aUpdateInfo.Version);
+    aUpdateHandler->setState(eState);
+}
+
+
+UpdateState
+UpdateCheck::getUIState(const UpdateInfo& rInfo)
+{
+    UpdateState eUIState = UPDATESTATE_NO_UPDATE_AVAIL;
+
+    if( !rInfo.BuildId.isEmpty() )
+    {
+        if( rInfo.Sources[0].IsDirect )
+            eUIState = UPDATESTATE_UPDATE_AVAIL;
+        else
+            eUIState = UPDATESTATE_UPDATE_NO_DOWNLOAD;
+    }
+
+    return eUIState;
+}
+
+
+void
+UpdateCheck::showReleaseNote(const OUString& rURL) const
+{
+    const uno::Reference< c3s::XSystemShellExecute > xShellExecute(
+        c3s::SystemShellExecute::create( m_xContext ) );
+
+    try {
+        xShellExecute->execute(rURL, OUString(), c3s::SystemShellExecuteFlags::URIS_ONLY);
+    } catch(const c3s::SystemShellExecuteException&) {
+    }
+}
+
+
+bool
+UpdateCheck::storeReleaseNote(sal_Int8 nNum, const OUString &rURL)
+{
+    osl::FileBase::RC rc;
+    OUString aTargetDir( UpdateCheckConfig::getAllUsersDirectory() + "/sun" );
+
+    osl::Directory::createPath( aTargetDir );
+
+    OUString aFileName = "releasenote" +
+                              OUString::number( nNum ) +
+                              ".url";
+
+    OUString aFilePath;
+    rc = osl::FileBase::getAbsoluteFileURL( aTargetDir, aFileName, aFilePath );
+    if ( rc != osl::FileBase::E_None ) return false;
+
+    osl::File::remove( aFilePath );
+
+    // don't store empty release notes, but delete old ones
+    if ( rURL.isEmpty() )
+        return true;
+
+    osl::File aFile( aFilePath );
+    rc = aFile.open( osl_File_OpenFlag_Write | osl_File_OpenFlag_Create );
+    if ( rc != osl::FileBase::E_None ) return false;
+
+    OString aLineBuf("[InternetShortcut]\r\n");
+    sal_uInt64 nWritten = 0;
+
+    OUString aURL( rURL );
+#ifdef _WIN32
+    rc = aFile.write( aLineBuf.getStr(), aLineBuf.getLength(), nWritten );
+    if ( rc != osl::FileBase::E_None ) return false;
+    aURL = "URL=" + rURL;
+#endif
+    aLineBuf = OUStringToOString( aURL, RTL_TEXTENCODING_UTF8 );
+    rc = aFile.write( aLineBuf.getStr(), aLineBuf.getLength(), nWritten );
+    if ( rc != osl::FileBase::E_None ) return false;
+
+    aFile.close();
+    return true;
+}
+
+
+void UpdateCheck::showExtensionDialog()
+{
+    uno::Reference< uno::XInterface > xService;
+
+    if( ! m_xContext.is() )
+        throw uno::RuntimeException(
+            "UpdateCheck::showExtensionDialog(): empty component context", uno::Reference< uno::XInterface > () );
+
+    uno::Reference< lang::XMultiComponentFactory > xServiceManager( m_xContext->getServiceManager() );
+    if( !xServiceManager.is() )
+        throw uno::RuntimeException(
+            "UpdateCheck::showExtensionDialog(): unable to obtain service manager from component context", uno::Reference< uno::XInterface > () );
+
+    xService = xServiceManager->createInstanceWithContext( "com.sun.star.deployment.ui.PackageManagerDialog", m_xContext );
+    uno::Reference< task::XJobExecutor > xExecutable( xService, uno::UNO_QUERY );
+    if ( xExecutable.is() )
+        xExecutable->trigger( "SHOW_UPDATE_DIALOG" );
+}
+
+
+rtl::Reference<UpdateHandler>
+UpdateCheck::getUpdateHandler()
+{
+    std::scoped_lock aGuard(m_aMutex);
+
+    if( ! m_aUpdateHandler.is() )
+        m_aUpdateHandler = new UpdateHandler(m_xContext, this);
+
+    return m_aUpdateHandler;
+}
+
+
+uno::Reference< task::XInteractionHandler >
+UpdateCheck::getInteractionHandler() const
+{
+    std::scoped_lock aGuard(m_aMutex);
+
+    uno::Reference< task::XInteractionHandler > xHandler;
+
+    if( m_aUpdateHandler.is() && m_aUpdateHandler->isVisible() )
+        xHandler = m_aUpdateHandler.get();
+
+    return xHandler;
+}
+
+
+bool
+UpdateCheck::isDialogShowing() const
+{
+    std::scoped_lock aGuard(m_aMutex);
+    return m_aUpdateHandler.is() && m_aUpdateHandler->isVisible();
+};
+
+
+void
+UpdateCheck::autoCheckStatusChanged(bool enabled)
+{
+    std::unique_lock aGuard(m_aMutex);
+
+    if( (CHECK_SCHEDULED == m_eState) && !enabled )
+        shutdownThread(false);
+
+    if( (DISABLED == m_eState) || (CHECK_SCHEDULED == m_eState) )
+    {
+        enableAutoCheck(enabled);
+        UpdateState eState = getUIState(m_aUpdateInfo);
+        aGuard.unlock();
+        setUIState(eState);
+    }
+};
+
+
+void
+UpdateCheck::autoCheckIntervalChanged()
+{
+    // just wake-up
+    m_aCondition.set();
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updatecheck.hxx b/extensions/source/update/check/updatecheck.hxx
new file mode 100644
index 000000000..546616f57
--- /dev/null
+++ b/extensions/source/update/check/updatecheck.hxx
@@ -0,0 +1,189 @@
+/* -*- 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 <condition_variable>
+#include <mutex>
+
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include <osl/conditn.hxx>
+#include <osl/thread.hxx>
+#include <rtl/instance.hxx>
+
+#include "updateinfo.hxx"
+#include "updatecheckconfiglistener.hxx"
+#include "actionlistener.hxx"
+#include "updatehdl.hxx"
+#include "download.hxx"
+
+
+class UpdateCheck;
+
+class UpdateCheckInitData {
+
+public:
+    inline rtl::Reference< UpdateCheck > operator() () const;
+};
+
+class WorkerThread : public osl::Thread
+{
+public:
+    virtual void cancel() = 0;
+};
+
+class UpdateCheck :
+    public UpdateCheckConfigListener,
+    public IActionListener,
+    public DownloadInteractionHandler,
+    public rtl::StaticWithInit< rtl::Reference< UpdateCheck >, UpdateCheckInitData >
+{
+    UpdateCheck();
+
+    virtual ~UpdateCheck() override;
+
+public:
+    operator rtl::Reference< UpdateCheckConfigListener > ()
+        { return static_cast< UpdateCheckConfigListener * > (this); }
+
+    void initialize(const css::uno::Sequence<css::beans::NamedValue>& rValues,
+                    const css::uno::Reference<css::uno::XComponentContext>& xContext);
+
+    // Update internal update info member
+    void setUpdateInfo(const UpdateInfo& aInfo);
+
+    /* This method turns on the menubar icon, triggers the bubble window or
+     * updates the dialog text when appropriate
+     */
+    void setUIState(UpdateState eState, bool suppressBubble = false);
+
+    // Returns the UI state that matches rInfo best
+    static UpdateState getUIState(const UpdateInfo& rInfo);
+
+    // Check for updates failed
+    void setCheckFailedState();
+
+    // Executes the update check dialog for manual checks and downloads interaction
+    void showDialog(bool forceCheck = false);
+
+    // Returns true if the update dialog is currently showing
+    bool isDialogShowing() const;
+    bool shouldShowExtUpdDlg() const { return ( m_bShowExtUpdDlg && m_bHasExtensionUpdate ); }
+    void showExtensionDialog();
+    void setHasExtensionUpdates( bool bHasUpdates ) { m_bHasExtensionUpdate = bHasUpdates; }
+    bool hasOfficeUpdate() const { return (m_aUpdateInfo.BuildId.getLength() > 0); }
+
+    // DownloadInteractionHandler
+    virtual bool downloadTargetExists(const OUString& rFileName) override;
+    virtual void downloadStalled(const OUString& rErrorMessage) override;
+    virtual void downloadProgressAt(sal_Int8 nProcent) override;
+    virtual void downloadStarted(const OUString& rLocalFileName, sal_Int64 nFileSize) override;
+    virtual void downloadFinished(const OUString& rLocalFileName) override;
+    // checks if the download target already exists and asks user what to do next
+    virtual bool checkDownloadDestination( const OUString& rFile ) override;
+
+    // Cancels the download action (and resumes checking if enabled)
+    void cancelDownload();
+
+    // Returns the XInteractionHandler of the UpdateHandler instance if present (and visible)
+    css::uno::Reference< css::task::XInteractionHandler > getInteractionHandler() const;
+
+    // UpdateCheckConfigListener
+    virtual void autoCheckStatusChanged(bool enabled) override;
+    virtual void autoCheckIntervalChanged() override;
+
+    // IActionListener
+    void cancel() override;
+    void download() override;
+    void install() override;
+    void pause() override;
+    void resume() override;
+    void closeAfterFailure() override;
+
+    void notifyUpdateCheckFinished();
+
+    void waitForUpdateCheckFinished();
+
+private:
+
+    // Schedules or cancels next automatic check for updates
+    void enableAutoCheck(bool enable);
+
+    // Starts/resumes or stops a download
+    void enableDownload(bool enable, bool paused=false);
+
+    // Shuts down the currently running thread
+    void shutdownThread(bool join);
+
+    // Returns the update handler instance
+    rtl::Reference<UpdateHandler> getUpdateHandler();
+
+    // Open the given URL in a browser
+    void showReleaseNote(const OUString& rURL) const;
+
+    // stores the release note url on disk to be used by setup app
+    static bool storeReleaseNote(sal_Int8 nNum, const OUString &rURL);
+
+    /* This method turns on the menubar icon and triggers the bubble window
+     */
+    void handleMenuBarUI( const rtl::Reference< UpdateHandler >& rUpdateHandler,
+                          UpdateState& eState, bool suppressBubble );
+    enum State {
+        NOT_INITIALIZED,
+        DISABLED,
+        CHECK_SCHEDULED,
+        DOWNLOADING,
+        DOWNLOAD_PAUSED
+    };
+
+    State m_eState;
+    UpdateState m_eUpdateState;
+
+    mutable std::recursive_mutex m_aMutex;
+    WorkerThread *m_pThread;
+    osl::Condition m_aCondition;
+
+    UpdateInfo m_aUpdateInfo;
+    OUString m_aImageName;
+    bool m_bHasExtensionUpdate;
+    bool m_bShowExtUpdDlg;
+
+    rtl::Reference<UpdateHandler> m_aUpdateHandler;
+    css::uno::Reference<css::beans::XPropertySet> m_xMenuBarUI;
+    css::uno::Reference<css::uno::XComponentContext> m_xContext;
+
+    bool m_updateCheckRunning = false;
+    std::condition_variable_any m_updateCheckFinished;
+
+    friend class UpdateCheckInitData;
+};
+
+inline rtl::Reference< UpdateCheck >
+UpdateCheckInitData::operator() () const
+{
+    return rtl::Reference< UpdateCheck > (new UpdateCheck());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updatecheckconfig.cxx b/extensions/source/update/check/updatecheckconfig.cxx
new file mode 100644
index 000000000..e728d91e7
--- /dev/null
+++ b/extensions/source/update/check/updatecheckconfig.cxx
@@ -0,0 +1,660 @@
+/* -*- 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 "updatecheckconfig.hxx"
+#include "updatecheck.hxx"
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <cppuhelper/supportsservice.hxx>
+#include <osl/security.hxx>
+#include <osl/time.h>
+#include <osl/file.hxx>
+#include <sal/macros.h>
+#include <o3tl/char16_t2wchar_t.hxx>
+
+#ifdef _WIN32
+#include <objbase.h>
+#include <shlobj.h>
+#endif
+
+namespace container = com::sun::star::container ;
+namespace beans = com::sun::star::beans ;
+namespace lang = com::sun::star::lang ;
+namespace util = com::sun::star::util ;
+namespace uno = com::sun::star::uno ;
+
+#define LAST_CHECK              "LastCheck"
+#define UPDATE_VERSION          "UpdateVersion"
+#define UPDATE_BUILDID          "UpdateBuildId"
+#define UPDATE_DESCRIPTION      "UpdateDescription"
+#define DOWNLOAD_URL            "DownloadURL"
+#define IS_DIRECT_DOWNLOAD      "IsDirectDownload"
+#define OLD_VERSION             "UpdateFoundFor"
+#define AUTOCHECK_ENABLED       "AutoCheckEnabled"
+#define AUTODOWNLOAD_ENABLED    "AutoDownloadEnabled"
+#define CHECK_INTERVAL          "CheckInterval"
+#define LOCAL_FILE              "LocalFile"
+#define DOWNLOAD_SIZE           "DownloadSize"
+#define DOWNLOAD_PAUSED         "DownloadPaused"
+#define DOWNLOAD_DESTINATION    "DownloadDestination"
+#define RELEASE_NOTE            "ReleaseNote"
+
+#define PROPERTY_VERSION        "Version"
+
+const char * const aUpdateEntryProperties[] = {
+    UPDATE_VERSION,
+    UPDATE_BUILDID,
+    UPDATE_DESCRIPTION,
+    DOWNLOAD_URL,
+    IS_DIRECT_DOWNLOAD,
+    RELEASE_NOTE"1",
+    RELEASE_NOTE"2",
+    RELEASE_NOTE"3",
+    RELEASE_NOTE"4",
+    RELEASE_NOTE"5",
+    OLD_VERSION
+};
+
+const sal_uInt32 nUpdateEntryProperties = SAL_N_ELEMENTS(aUpdateEntryProperties);
+
+css::uno::Any NamedValueByNameAccess::getValue(const char * pName)
+{
+    const sal_Int32 nLen = m_rValues.getLength();
+    for( sal_Int32 n=0; n < nLen; ++n )
+    {
+        if( m_rValues[n].Name.equalsAscii( pName ) )
+            return m_rValues[n].Value;
+    }
+    return css::uno::Any();
+}
+
+bool
+UpdateCheckROModel::isAutoCheckEnabled() const
+{
+    return m_aNameAccess.getValue(AUTOCHECK_ENABLED).get<bool>();
+}
+
+bool
+UpdateCheckROModel::isDownloadPaused() const
+{
+    return m_aNameAccess.getValue(DOWNLOAD_PAUSED).get<bool>();
+}
+
+OUString
+UpdateCheckROModel::getStringValue(const char * pStr) const
+{
+    uno::Any aAny( m_aNameAccess.getValue(pStr) );
+    OUString aRet;
+
+    aAny >>= aRet;
+
+    return aRet;
+}
+
+OUString UpdateCheckROModel::getLocalFileName() const
+{
+    return getStringValue(LOCAL_FILE);
+};
+
+sal_Int64 UpdateCheckROModel::getDownloadSize() const
+{
+    uno::Any aAny( m_aNameAccess.getValue(DOWNLOAD_SIZE) );
+    sal_Int64 nRet = -1;
+
+    aAny >>= nRet;
+    return nRet;
+};
+
+OUString
+UpdateCheckROModel::getUpdateEntryVersion() const
+{
+    return getStringValue(OLD_VERSION);
+}
+
+void
+UpdateCheckROModel::getUpdateEntry(UpdateInfo& rInfo) const
+{
+    rInfo.BuildId = getStringValue(UPDATE_BUILDID);
+    rInfo.Version = getStringValue(UPDATE_VERSION);
+    rInfo.Description = getStringValue(UPDATE_DESCRIPTION);
+
+    bool isDirectDownload = false;
+    m_aNameAccess.getValue(IS_DIRECT_DOWNLOAD) >>= isDirectDownload;
+
+    rInfo.Sources.push_back( DownloadSource( isDirectDownload, getStringValue(DOWNLOAD_URL) ) );
+
+    for(sal_Int32 n=1; n < 6; ++n )
+    {
+        OUString aUStr = getStringValue(
+            OString(OString::Concat(RELEASE_NOTE) + OString::number(n)).getStr());
+        if( !aUStr.isEmpty() )
+            rInfo.ReleaseNotes.push_back(ReleaseNote(static_cast<sal_Int8>(n), aUStr));
+    }
+}
+
+OUString UpdateCheckConfig::getDownloadsDirectory()
+{
+    OUString aRet;
+
+#ifdef _WIN32
+    PWSTR szPath;
+
+    if (SHGetKnownFolderPath(FOLDERID_Downloads, 0, nullptr, &szPath) == S_OK)
+    {
+        aRet = o3tl::toU(szPath);
+        CoTaskMemFree(szPath);
+        osl::FileBase::getFileURLFromSystemPath( aRet, aRet );
+    }
+#else
+    // This should become a desktop specific setting in some system backend ..
+    OUString aHomeDir;
+    osl::Security().getHomeDir( aHomeDir );
+    aRet = aHomeDir + "/Desktop";
+
+    // Set path to home directory when there is no /Desktop directory
+    osl::Directory aDocumentsDir( aRet );
+    if( osl::FileBase::E_None != aDocumentsDir.open() )
+        aRet = aHomeDir;
+#endif
+
+    return aRet;
+}
+
+OUString UpdateCheckConfig::getAllUsersDirectory()
+{
+    OUString aRet;
+
+#ifdef _WIN32
+    WCHAR szPath[MAX_PATH];
+
+    if (TRUE == SHGetSpecialFolderPathW(nullptr, szPath, CSIDL_COMMON_DOCUMENTS, true))
+    {
+        aRet = o3tl::toU(szPath);
+        osl::FileBase::getFileURLFromSystemPath( aRet, aRet );
+    }
+#else
+    osl::FileBase::getTempDirURL(aRet);
+#endif
+
+    return aRet;
+}
+
+UpdateCheckConfig::UpdateCheckConfig( const uno::Reference<container::XNameContainer>& xContainer,
+                                      const uno::Reference<container::XNameContainer>& xAvailableUpdates,
+                                      const uno::Reference<container::XNameContainer>& xIgnoredUpdates,
+                                      const ::rtl::Reference< UpdateCheckConfigListener >& rListener ) :
+    m_xContainer( xContainer ),
+    m_xAvailableUpdates( xAvailableUpdates ),
+    m_xIgnoredUpdates( xIgnoredUpdates ),
+    m_rListener( rListener )
+{}
+
+UpdateCheckConfig::~UpdateCheckConfig()
+{}
+
+::rtl::Reference< UpdateCheckConfig >
+UpdateCheckConfig::get(
+    const uno::Reference<uno::XComponentContext>& xContext,
+    const ::rtl::Reference< UpdateCheckConfigListener >& rListener)
+{
+    uno::Reference< lang::XMultiServiceFactory > xConfigProvider(
+        css::configuration::theDefaultProvider::get( xContext ) );
+
+    beans::PropertyValue aProperty;
+    aProperty.Name  = "nodepath";
+    aProperty.Value <<= OUString("org.openoffice.Office.Jobs/Jobs/UpdateCheck/Arguments");
+
+    uno::Sequence< uno::Any > aArgumentList{ uno::Any(aProperty) };
+
+    uno::Reference< container::XNameContainer > xContainer(
+        xConfigProvider->createInstanceWithArguments(
+            "com.sun.star.configuration.ConfigurationUpdateAccess", aArgumentList ),
+        uno::UNO_QUERY_THROW );
+
+    aProperty.Value <<= OUString("/org.openoffice.Office.ExtensionManager/ExtensionUpdateData/IgnoredUpdates");
+    aArgumentList = { uno::Any(aProperty) };
+    uno::Reference< container::XNameContainer > xIgnoredExt( xConfigProvider->createInstanceWithArguments( "com.sun.star.configuration.ConfigurationUpdateAccess", aArgumentList ), uno::UNO_QUERY_THROW );
+
+    aProperty.Value <<= OUString("/org.openoffice.Office.ExtensionManager/ExtensionUpdateData/AvailableUpdates");
+    aArgumentList = { uno::Any(aProperty) };
+    uno::Reference< container::XNameContainer > xUpdateAvail( xConfigProvider->createInstanceWithArguments( "com.sun.star.configuration.ConfigurationUpdateAccess", aArgumentList ), uno::UNO_QUERY_THROW );
+
+    return new UpdateCheckConfig( xContainer, xUpdateAvail, xIgnoredExt, rListener );
+}
+
+bool
+UpdateCheckConfig::isAutoCheckEnabled() const
+{
+    bool nValue = false;
+    const_cast < UpdateCheckConfig *> (this)->getByName( AUTOCHECK_ENABLED ) >>= nValue;
+    return nValue;
+}
+
+bool
+UpdateCheckConfig::isAutoDownloadEnabled() const
+{
+    bool nValue = false;
+    const_cast < UpdateCheckConfig *> (this)->getByName( AUTODOWNLOAD_ENABLED ) >>= nValue;
+    return nValue;
+}
+
+OUString
+UpdateCheckConfig::getUpdateEntryVersion() const
+{
+    OUString aValue;
+
+    // getByName is defined as non const in XNameAccess
+    const_cast < UpdateCheckConfig *> (this)->getByName( OLD_VERSION ) >>= aValue;
+
+    return aValue;
+}
+
+sal_Int64
+UpdateCheckConfig::getLastChecked() const
+{
+    sal_Int64 nValue = 0;
+
+    // getByName is defined as non const in XNameAccess
+    const_cast < UpdateCheckConfig *> (this)->getByName( LAST_CHECK ) >>= nValue;
+
+    return nValue;
+}
+
+sal_Int64
+UpdateCheckConfig::getCheckInterval() const
+{
+    sal_Int64 nValue = 0;
+
+    // getByName is defined as non const in XNameAccess
+    const_cast < UpdateCheckConfig *> (this)->getByName( CHECK_INTERVAL ) >>= nValue;
+
+    return nValue;
+}
+
+OUString
+UpdateCheckConfig::getLocalFileName() const
+{
+    OUString aName = LOCAL_FILE;
+    OUString aRet;
+
+    if( m_xContainer->hasByName(aName) )
+        m_xContainer->getByName(aName) >>= aRet;
+
+    return aRet;
+}
+
+OUString
+UpdateCheckConfig::getDownloadDestination() const
+{
+    OUString aRet;
+
+    const_cast <UpdateCheckConfig *> (this)->getByName(DOWNLOAD_DESTINATION) >>= aRet;
+
+    return aRet;
+}
+
+void
+UpdateCheckConfig::storeLocalFileName(const OUString& rLocalFileName, sal_Int64 nFileSize)
+{
+    const sal_uInt8 nItems = 2;
+    const OUString aNameList[nItems] = { OUString(LOCAL_FILE), OUString(DOWNLOAD_SIZE) };
+    const uno::Any aValueList[nItems] = { uno::Any(rLocalFileName), uno::Any(nFileSize) };
+
+    for( sal_uInt8 i=0; i < nItems; ++i )
+    {
+        if( m_xContainer->hasByName(aNameList[i]) )
+            m_xContainer->replaceByName(aNameList[i], aValueList[i]);
+        else
+            m_xContainer->insertByName(aNameList[i], aValueList[i]);
+    }
+
+    commitChanges();
+}
+
+void
+UpdateCheckConfig::clearLocalFileName()
+{
+    const sal_uInt8 nItems = 2;
+    const OUString aNameList[nItems] = { OUString(LOCAL_FILE), OUString(DOWNLOAD_SIZE) };
+
+    for(const auto & i : aNameList)
+    {
+        if( m_xContainer->hasByName(i) )
+            m_xContainer->removeByName(i);
+    }
+
+    commitChanges();
+}
+
+void
+UpdateCheckConfig::storeDownloadPaused(bool paused)
+{
+    replaceByName(DOWNLOAD_PAUSED , uno::Any(paused));
+    commitChanges();
+}
+
+void
+UpdateCheckConfig::updateLastChecked()
+{
+    TimeValue systime;
+    osl_getSystemTime(&systime);
+
+    sal_Int64 lastCheck = systime.Seconds;
+
+    replaceByName(LAST_CHECK, uno::Any(lastCheck));
+}
+
+void
+UpdateCheckConfig::storeUpdateFound( const UpdateInfo& rInfo, const OUString& aCurrentBuild)
+
+{
+    bool autoDownloadEnabled = isAutoDownloadEnabled();
+
+    uno::Any aValues[nUpdateEntryProperties] =
+    {
+        uno::Any(rInfo.Version),
+        uno::Any(rInfo.BuildId),
+        uno::Any(rInfo.Description),
+        uno::Any(rInfo.Sources[0].URL),
+        uno::Any(rInfo.Sources[0].IsDirect),
+        uno::Any(getReleaseNote(rInfo, 1, autoDownloadEnabled) ),
+        uno::Any(getReleaseNote(rInfo, 2, autoDownloadEnabled) ),
+        uno::Any(getReleaseNote(rInfo, 3, autoDownloadEnabled) ),
+        uno::Any(getReleaseNote(rInfo, 4, autoDownloadEnabled) ),
+        uno::Any(getReleaseNote(rInfo, 5, autoDownloadEnabled) ),
+        uno::Any(aCurrentBuild)
+    };
+
+    OUString aName;
+    for( sal_uInt32 n=0; n < nUpdateEntryProperties; ++n )
+    {
+        aName = OUString::createFromAscii(aUpdateEntryProperties[n]);
+
+        if( m_xContainer->hasByName(aName) )
+            m_xContainer->replaceByName(aName, aValues[n]);
+        else
+            m_xContainer->insertByName(aName,aValues[n]);
+    }
+
+    commitChanges();
+}
+
+void
+UpdateCheckConfig::clearUpdateFound()
+{
+    OUString aName;
+
+    for(const char* aUpdateEntryProperty : aUpdateEntryProperties)
+    {
+        aName = OUString::createFromAscii(aUpdateEntryProperty);
+
+        try {
+            if( m_xContainer->hasByName(aName) )
+                m_xContainer->removeByName(aName);
+        } catch(const lang::WrappedTargetException& ) {
+            // Can not remove value, probably in share layer
+            OSL_ASSERT(false);
+            m_xContainer->replaceByName(aName, uno::Any(OUString()));
+        }
+    }
+
+    /* As we have removed UpdateVersionFound from the shared configuration
+     * existing entries in the user layer do not have a oor operation and
+     * thus are completely ignored (which also means they can not be removed).
+     */
+
+    commitChanges();
+}
+
+uno::Type SAL_CALL
+UpdateCheckConfig::getElementType()
+{
+    return m_xContainer->getElementType();
+}
+
+sal_Bool SAL_CALL
+UpdateCheckConfig::hasElements()
+{
+    return m_xContainer->hasElements();
+}
+
+uno::Any SAL_CALL
+UpdateCheckConfig::getByName( const OUString& aName )
+{
+    uno::Any aValue = m_xContainer->getByName( aName );
+
+    // Provide dynamic default value
+    if( aName == DOWNLOAD_DESTINATION )
+    {
+        OUString aStr;
+        aValue >>= aStr;
+
+        if( aStr.isEmpty() )
+            aValue <<= getDownloadsDirectory();
+    }
+    return aValue;
+}
+
+uno::Sequence< OUString > SAL_CALL
+UpdateCheckConfig::getElementNames()
+{
+    return m_xContainer->getElementNames();
+}
+
+sal_Bool SAL_CALL
+UpdateCheckConfig::hasByName( const OUString& aName )
+{
+    return m_xContainer->hasByName( aName );
+}
+
+void SAL_CALL
+UpdateCheckConfig::replaceByName( const OUString& aName, const uno::Any& aElement )
+{
+    return m_xContainer->replaceByName( aName, aElement );
+}
+
+// XChangesBatch
+
+void SAL_CALL
+UpdateCheckConfig::commitChanges()
+{
+    uno::Reference< util::XChangesBatch > xChangesBatch(m_xContainer, uno::UNO_QUERY);
+    if( xChangesBatch.is() && xChangesBatch->hasPendingChanges() )
+    {
+        util::ChangesSet aChangesSet = xChangesBatch->getPendingChanges();
+        xChangesBatch->commitChanges();
+
+        if( m_rListener.is() )
+        {
+            const sal_Int32 nChanges = aChangesSet.getLength();
+            OUString aString;
+
+            for( sal_Int32 i=0; i<nChanges; ++i )
+            {
+                aChangesSet[i].Accessor >>= aString;
+                if( aString.endsWith(AUTOCHECK_ENABLED "']") )
+                {
+                    bool bEnabled = false;
+                    aChangesSet[i].Element >>= bEnabled;
+                    m_rListener->autoCheckStatusChanged(bEnabled);
+                }
+                else if( aString.endsWith(CHECK_INTERVAL "']") )
+                {
+                    m_rListener->autoCheckIntervalChanged();
+                }
+            }
+        }
+    }
+
+    xChangesBatch.set( m_xAvailableUpdates, uno::UNO_QUERY );
+    if( xChangesBatch.is() && xChangesBatch->hasPendingChanges() )
+    {
+        xChangesBatch->commitChanges();
+    }
+    xChangesBatch.set( m_xIgnoredUpdates, uno::UNO_QUERY );
+    if( xChangesBatch.is() && xChangesBatch->hasPendingChanges() )
+    {
+        xChangesBatch->commitChanges();
+    }
+}
+
+sal_Bool SAL_CALL
+UpdateCheckConfig::hasPendingChanges(  )
+{
+    uno::Reference< util::XChangesBatch > xChangesBatch(m_xContainer, uno::UNO_QUERY);
+    if( xChangesBatch.is() )
+        return xChangesBatch->hasPendingChanges();
+
+    return false;
+}
+
+uno::Sequence< util::ElementChange > SAL_CALL
+UpdateCheckConfig::getPendingChanges(  )
+{
+    uno::Reference< util::XChangesBatch > xChangesBatch(m_xContainer, uno::UNO_QUERY);
+    if( xChangesBatch.is() )
+        return xChangesBatch->getPendingChanges();
+
+    return uno::Sequence< util::ElementChange >();
+}
+
+bool UpdateCheckConfig::storeExtensionVersion( const OUString& rExtensionName,
+                                               const OUString& rVersion )
+{
+    bool bNotify = true;
+
+    if ( m_xAvailableUpdates->hasByName( rExtensionName ) )
+        uno::Reference< beans::XPropertySet >( m_xAvailableUpdates->getByName( rExtensionName ), uno::UNO_QUERY_THROW )->setPropertyValue( PROPERTY_VERSION, uno::Any( rVersion ) );
+    else
+    {
+        uno::Reference< beans::XPropertySet > elem( uno::Reference< lang::XSingleServiceFactory >( m_xAvailableUpdates, uno::UNO_QUERY_THROW )->createInstance(), uno::UNO_QUERY_THROW );
+        elem->setPropertyValue( PROPERTY_VERSION, uno::Any( rVersion ) );
+        m_xAvailableUpdates->insertByName( rExtensionName, uno::Any( elem ) );
+    }
+
+    if ( m_xIgnoredUpdates->hasByName( rExtensionName ) )
+    {
+        OUString aIgnoredVersion;
+        uno::Any aValue( uno::Reference< beans::XPropertySet >( m_xIgnoredUpdates->getByName( rExtensionName ), uno::UNO_QUERY_THROW )->getPropertyValue( PROPERTY_VERSION ) );
+        aValue >>= aIgnoredVersion;
+        if ( aIgnoredVersion.isEmpty() ) // no version means ignore all updates
+            bNotify = false;
+        else if ( aIgnoredVersion == rVersion ) // the user wanted to ignore this update
+            bNotify = false;
+    }
+
+    commitChanges();
+
+    return bNotify;
+}
+
+bool UpdateCheckConfig::checkExtensionVersion( const OUString& rExtensionName,
+                                               const OUString& rVersion )
+{
+    if ( m_xAvailableUpdates->hasByName( rExtensionName ) )
+    {
+        OUString aStoredVersion;
+        uno::Any aValue( uno::Reference< beans::XPropertySet >( m_xAvailableUpdates->getByName( rExtensionName ), uno::UNO_QUERY_THROW )->getPropertyValue( PROPERTY_VERSION ) );
+        aValue >>= aStoredVersion;
+
+        if ( m_xIgnoredUpdates->hasByName( rExtensionName ) )
+        {
+            OUString aIgnoredVersion;
+            uno::Any aValue2( uno::Reference< beans::XPropertySet >( m_xIgnoredUpdates->getByName( rExtensionName ), uno::UNO_QUERY_THROW )->getPropertyValue( PROPERTY_VERSION ) );
+            aValue2 >>= aIgnoredVersion;
+            if ( aIgnoredVersion.isEmpty() ) // no version means ignore all updates
+                return false;
+            else if ( aIgnoredVersion == aStoredVersion ) // the user wanted to ignore this update
+                return false;
+            // TODO: else delete ignored entry?
+        }
+        if ( isVersionGreater( rVersion, aStoredVersion ) )
+            return true;
+        else
+        {
+            m_xAvailableUpdates->removeByName( rExtensionName );
+            commitChanges();
+        }
+    }
+
+    return false;
+}
+
+OUString UpdateCheckConfig::getSubVersion( const OUString& rVersion,
+                                                sal_Int32 *nIndex )
+{
+    while ( *nIndex < rVersion.getLength() && rVersion[*nIndex] == '0')
+    {
+        ++*nIndex;
+    }
+
+    return rVersion.getToken( 0, '.', *nIndex );
+}
+
+/// checks if the second version string is greater than the first one
+bool UpdateCheckConfig::isVersionGreater( const OUString& rVersion1,
+                                          const OUString& rVersion2 )
+{
+    for ( sal_Int32 i1 = 0, i2 = 0; i1 >= 0 || i2 >= 0; )
+    {
+        OUString sSub1( getSubVersion( rVersion1, &i1 ) );
+        OUString sSub2( getSubVersion( rVersion2, &i2 ) );
+
+        if ( sSub1.getLength() < sSub2.getLength() ) {
+            return true;
+        } else if ( sSub1.getLength() > sSub2.getLength() ) {
+            return false;
+        } else if ( sSub1 < sSub2 ) {
+            return true;
+        } else if ( sSub1 > sSub2 ) {
+            return false;
+        }
+    }
+    return false;
+}
+
+OUString SAL_CALL
+UpdateCheckConfig::getImplementationName()
+{
+    return "vnd.sun.UpdateCheckConfig";
+}
+
+sal_Bool SAL_CALL
+UpdateCheckConfig::supportsService(OUString const & serviceName)
+{
+    return cppu::supportsService(this, serviceName);
+}
+
+uno::Sequence< OUString > SAL_CALL
+UpdateCheckConfig::getSupportedServiceNames()
+{
+    return { "com.sun.star.setup.UpdateCheckConfig" };
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+extensions_update_UpdateCheckConfig_get_implementation(
+    css::uno::XComponentContext* context , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(UpdateCheckConfig::get(context, *UpdateCheck::get()).get());
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updatecheckconfig.hxx b/extensions/source/update/check/updatecheckconfig.hxx
new file mode 100644
index 000000000..a9836c624
--- /dev/null
+++ b/extensions/source/update/check/updatecheckconfig.hxx
@@ -0,0 +1,205 @@
+/* -*- 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/beans/NamedValue.hpp>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/util/XChangesBatch.hpp>
+#include <rtl/ref.hxx>
+
+#include "updatecheckconfiglistener.hxx"
+#include "updateinfo.hxx"
+
+/* This helper class provides by name access to a sequence of named values */
+class NamedValueByNameAccess
+{
+    const css::uno::Sequence< css::beans::NamedValue >& m_rValues;
+
+public:
+    explicit NamedValueByNameAccess(
+        const css::uno::Sequence< css::beans::NamedValue >& rValues) :
+        m_rValues(rValues) {} ;
+
+    css::uno::Any getValue(const char * pName);
+};
+
+
+/* This class encapsulates the configuration item actually used for storing the state
+ * the update check is actually in.
+ */
+class UpdateCheckROModel
+{
+public:
+    explicit UpdateCheckROModel(NamedValueByNameAccess& aNameAccess) : m_aNameAccess(aNameAccess) {};
+
+    bool isAutoCheckEnabled() const;
+    bool isDownloadPaused() const;
+    OUString getLocalFileName() const;
+    sal_Int64 getDownloadSize() const;
+
+    OUString getUpdateEntryVersion() const;
+    void getUpdateEntry(UpdateInfo& rInfo) const;
+
+private:
+
+    OUString getStringValue(const char *) const;
+
+    NamedValueByNameAccess& m_aNameAccess;
+};
+
+
+/* This class implements the non published UNO service com.sun.star.setup.UpdateCheckConfig,
+ * which primary use is to be able to track changes done in the Tools -> Options page of this
+ * component, as this is not supported by the OOo configuration for extendable groups.
+ */
+
+class UpdateCheckConfig : public ::cppu::WeakImplHelper<
+    css::container::XNameReplace,
+    css::util::XChangesBatch,
+    css::lang::XServiceInfo >
+{
+    UpdateCheckConfig( const css::uno::Reference< css::container::XNameContainer >& xContainer,
+                       const css::uno::Reference< css::container::XNameContainer >& xAvailableUpdates,
+                       const css::uno::Reference< css::container::XNameContainer >& xIgnoredUpdates,
+                       const ::rtl::Reference< UpdateCheckConfigListener >& rListener );
+
+    virtual ~UpdateCheckConfig() override;
+
+public:
+
+    static ::rtl::Reference< UpdateCheckConfig > get(
+        const css::uno::Reference< css::uno::XComponentContext >& xContext,
+        const ::rtl::Reference< UpdateCheckConfigListener >& rListener = ::rtl::Reference< UpdateCheckConfigListener >());
+
+    // Should really implement ROModel...
+    bool isAutoCheckEnabled() const;
+    bool isAutoDownloadEnabled() const;
+    OUString getUpdateEntryVersion() const;
+
+    /* Updates the timestamp of last check, but does not commit the change
+     * as either clearUpdateFound() or setUpdateFound() are expected to get
+     * called next.
+     */
+    void updateLastChecked();
+
+    /* Returns the date of the last successful check in seconds since 1970 */
+    sal_Int64 getLastChecked() const;
+
+    /* Returns configured check interval in seconds */
+    sal_Int64 getCheckInterval() const;
+
+    /* Reset values of previously remembered update
+     */
+    void clearUpdateFound();
+
+    /* Stores the specified data of an available update
+     */
+    void storeUpdateFound(const UpdateInfo& rInfo, const OUString& aCurrentBuild);
+
+    // Returns the local file name of a started download
+    OUString getLocalFileName() const;
+
+    // Returns the local file name of a started download
+    OUString getDownloadDestination() const;
+
+    // stores the local file name of a just started download
+    void storeLocalFileName(const OUString& rFileName, sal_Int64 nFileSize);
+
+    // Removes the local file name of a download
+    void clearLocalFileName();
+
+    // Stores the bool value for manually paused downloads
+    void storeDownloadPaused(bool paused);
+
+    // Returns the directory for downloaded files
+    static OUString getDownloadsDirectory();
+
+    // Returns a directory accessible for all users
+    static OUString getAllUsersDirectory();
+
+    // store and retrieve information about extensions
+    bool storeExtensionVersion( const OUString& rExtensionName,
+                                const OUString& rVersion );
+    bool checkExtensionVersion( const OUString& rExtensionName,
+                                const OUString& rVersion );
+
+    // XElementAccess
+    virtual css::uno::Type SAL_CALL getElementType(  ) override;
+    virtual sal_Bool SAL_CALL hasElements(  ) override;
+
+    // XNameAccess
+    virtual css::uno::Any SAL_CALL getByName( const OUString& aName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getElementNames(  ) override;
+    virtual sal_Bool SAL_CALL hasByName( const OUString& aName ) override;
+
+    // XNameReplace
+    virtual void SAL_CALL replaceByName( const OUString& aName, const css::uno::Any& aElement ) override;
+
+    // XChangesBatch
+    virtual void SAL_CALL commitChanges(  ) override;
+    virtual sal_Bool SAL_CALL hasPendingChanges(  ) override;
+    virtual css::uno::Sequence< css::util::ElementChange > SAL_CALL getPendingChanges(  ) override;
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(OUString const & serviceName) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+private:
+
+    static OUString getSubVersion( const OUString& rVersion, sal_Int32 *nIndex );
+    static bool isVersionGreater( const OUString& rVersion1, const OUString& rVersion2 );
+
+    const css::uno::Reference< css::container::XNameContainer > m_xContainer;
+    const css::uno::Reference< css::container::XNameContainer > m_xAvailableUpdates;
+    const css::uno::Reference< css::container::XNameContainer > m_xIgnoredUpdates;
+    const ::rtl::Reference< UpdateCheckConfigListener > m_rListener;
+};
+
+/// @throws css::uno::RuntimeException
+template <typename T>
+T getValue( const css::uno::Sequence< css::beans::NamedValue >& rNamedValues, const char * pszName )
+{
+    for( css::beans::NamedValue const & nv : rNamedValues )
+    {
+        // Unfortunately gcc-3.3 does not like Any.get<T>();
+        if( nv.Name.equalsAscii( pszName ) )
+        {
+            T value = T();
+            if( ! (nv.Value >>= value) )
+                throw css::uno::RuntimeException(
+                    OUString(
+                        cppu_Any_extraction_failure_msg(
+                            &nv.Value,
+                            ::cppu::getTypeFavourUnsigned(&value).getTypeLibType() ),
+                            SAL_NO_ACQUIRE ),
+                    css::uno::Reference< css::uno::XInterface >() );
+
+            return value;
+        }
+    }
+
+    return T();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updatecheckconfiglistener.hxx b/extensions/source/update/check/updatecheckconfiglistener.hxx
new file mode 100644
index 000000000..903200f68
--- /dev/null
+++ b/extensions/source/update/check/updatecheckconfiglistener.hxx
@@ -0,0 +1,37 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * 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 <salhelper/simplereferenceobject.hxx>
+
+/* This interface should be implemented by classes acting
+ * as controller (as in the MVC pattern).
+ */
+
+struct UpdateCheckConfigListener : public virtual salhelper::SimpleReferenceObject
+{
+    virtual void autoCheckStatusChanged(bool enabled) = 0;
+    virtual void autoCheckIntervalChanged() = 0;
+
+protected:
+    virtual ~UpdateCheckConfigListener() override {}
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updatecheckjob.cxx b/extensions/source/update/check/updatecheckjob.cxx
new file mode 100644
index 000000000..82d2f7439
--- /dev/null
+++ b/extensions/source/update/check/updatecheckjob.cxx
@@ -0,0 +1,322 @@
+/* -*- 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 "updatecheck.hxx"
+#include "updatecheckconfig.hxx"
+#include "updatehdl.hxx"
+#include "updateprotocol.hxx"
+
+#include <memory>
+#include <mutex>
+#include <utility>
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <tools/diagnose_ex.h>
+
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/frame/XTerminateListener.hpp>
+#include <com/sun/star/task/XJob.hpp>
+
+namespace beans = com::sun::star::beans ;
+namespace frame = com::sun::star::frame ;
+namespace lang = com::sun::star::lang ;
+namespace task = com::sun::star::task ;
+namespace uno = com::sun::star::uno ;
+
+namespace
+{
+
+class InitUpdateCheckJobThread : public osl::Thread
+{
+public:
+    InitUpdateCheckJobThread( const uno::Reference< uno::XComponentContext > &xContext,
+                              const uno::Sequence< beans::NamedValue > &xParameters,
+                              bool bShowDialog );
+
+    virtual void SAL_CALL run() override;
+
+    void    setTerminating();
+
+private:
+    osl::Condition m_aCondition;
+    uno::Reference<uno::XComponentContext> m_xContext;
+    uno::Sequence<beans::NamedValue> m_xParameters;
+    bool m_bShowDialog;
+    bool m_bTerminating;
+
+    std::mutex m_mutex;
+    rtl::Reference<UpdateCheck> m_controller;
+};
+
+class UpdateCheckJob :
+    public ::cppu::WeakImplHelper< task::XJob, lang::XServiceInfo, frame::XTerminateListener >
+{
+    virtual ~UpdateCheckJob() override;
+
+public:
+
+    UpdateCheckJob(
+        css::uno::Reference<css::uno::XComponentContext> const & context,
+        css::uno::Reference<css::frame::XDesktop2> const & desktop):
+        m_xContext(context), m_xDesktop(desktop)
+    {}
+
+    // XJob
+    virtual uno::Any SAL_CALL execute(const uno::Sequence<beans::NamedValue>&) override;
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(OUString const & serviceName) override;
+    virtual uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XEventListener
+    virtual void SAL_CALL disposing( css::lang::EventObject const & evt ) override;
+
+    // XTerminateListener
+    virtual void SAL_CALL queryTermination( lang::EventObject const & evt ) override;
+    virtual void SAL_CALL notifyTermination( lang::EventObject const & evt ) override;
+
+private:
+    uno::Reference<uno::XComponentContext>  m_xContext;
+    uno::Reference< frame::XDesktop2 >      m_xDesktop;
+    std::unique_ptr< InitUpdateCheckJobThread > m_pInitThread;
+
+    void handleExtensionUpdates( const uno::Sequence< beans::NamedValue > &rListProp );
+    void terminateAndJoinThread();
+};
+
+InitUpdateCheckJobThread::InitUpdateCheckJobThread(
+            const uno::Reference< uno::XComponentContext > &xContext,
+            const uno::Sequence< beans::NamedValue > &xParameters,
+            bool bShowDialog ) :
+    m_xContext( xContext ),
+    m_xParameters( xParameters ),
+    m_bShowDialog( bShowDialog ),
+    m_bTerminating( false )
+{
+    create();
+}
+
+
+void SAL_CALL InitUpdateCheckJobThread::run()
+{
+    osl_setThreadName("InitUpdateCheckJobThread");
+
+    if (!m_bShowDialog) {
+        TimeValue tv = { 25, 0 };
+        m_aCondition.wait( &tv );
+        if ( m_bTerminating )
+            return;
+    }
+
+    try {
+        rtl::Reference< UpdateCheck > aController( UpdateCheck::get() );
+        // At least for the automatic ("onFirstVisibleTask", i.e., !m_bShowDialog) check, wait for
+        // m_controller during setTerminating, to prevent m_controller from still having threads
+        // running during exit (ideally, we would make sure that all threads are joined before exit,
+        // but the UpdateCheck logic is rather convoluted, so play it safe for now and only address
+        // the automatic update check that is known to cause issues during `make check`, not the
+        // manually triggered update check scenario):
+        if (!m_bShowDialog) {
+            std::scoped_lock l(m_mutex);
+            m_controller = aController;
+        }
+        aController->initialize( m_xParameters, m_xContext );
+
+        if ( m_bShowDialog )
+            aController->showDialog( true );
+    } catch (const uno::Exception &) {
+        // fdo#64962 - don't bring the app down on some unexpected exception.
+        TOOLS_WARN_EXCEPTION("extensions.update", "Caught init update exception, thread terminated" );
+        {
+            std::scoped_lock l(m_mutex);
+            m_controller.clear();
+        }
+    }
+}
+
+void InitUpdateCheckJobThread::setTerminating() {
+    m_bTerminating = true;
+    m_aCondition.set();
+    rtl::Reference<UpdateCheck> controller;
+    {
+        std::scoped_lock l(m_mutex);
+        std::swap(controller, m_controller);
+    }
+    if (controller.is()) {
+        controller->waitForUpdateCheckFinished();
+    }
+}
+
+UpdateCheckJob::~UpdateCheckJob()
+{
+}
+
+uno::Any
+UpdateCheckJob::execute(const uno::Sequence<beans::NamedValue>& namedValues)
+{
+    for ( sal_Int32 n=namedValues.getLength(); n-- > 0; )
+    {
+        if ( namedValues[ n ].Name == "DynamicData" )
+        {
+            uno::Sequence<beans::NamedValue> aListProp;
+            if ( namedValues[n].Value >>= aListProp )
+            {
+                for ( sal_Int32 i=aListProp.getLength(); i-- > 0; )
+                {
+                    if ( aListProp[ i ].Name == "updateList" )
+                    {
+                        handleExtensionUpdates( aListProp );
+                        return uno::Any();
+                    }
+                }
+            }
+        }
+    }
+
+    uno::Sequence<beans::NamedValue> aConfig =
+        getValue< uno::Sequence<beans::NamedValue> > (namedValues, "JobConfig");
+
+    /* Determine the way we got invoked here -
+     * see Developers Guide Chapter "4.7.2 Jobs" to understand the magic
+     */
+
+    uno::Sequence<beans::NamedValue> aEnvironment =
+        getValue< uno::Sequence<beans::NamedValue> > (namedValues, "Environment");
+
+    OUString aEventName = getValue< OUString > (aEnvironment, "EventName");
+
+    m_pInitThread.reset(
+        new InitUpdateCheckJobThread(
+            m_xContext, aConfig,
+            aEventName != "onFirstVisibleTask"));
+
+    return uno::Any();
+}
+
+
+void UpdateCheckJob::handleExtensionUpdates( const uno::Sequence< beans::NamedValue > &rListProp )
+{
+    try {
+        uno::Sequence< uno::Sequence< OUString > > aList =
+            getValue< uno::Sequence< uno::Sequence< OUString > > > ( rListProp, "updateList" );
+        bool bPrepareOnly = getValue< bool > ( rListProp, "prepareOnly" );
+
+        // we will first store any new found updates and then check, if there are any
+        // pending updates.
+        storeExtensionUpdateInfos( m_xContext, aList );
+
+        if ( bPrepareOnly )
+            return;
+
+        bool bHasUpdates = checkForPendingUpdates( m_xContext );
+
+        rtl::Reference<UpdateCheck> aController( UpdateCheck::get() );
+        if ( ! aController.is() )
+            return;
+
+        aController->setHasExtensionUpdates( bHasUpdates );
+
+        if ( ! aController->hasOfficeUpdate() )
+        {
+            if ( bHasUpdates )
+                aController->setUIState( UPDATESTATE_EXT_UPD_AVAIL, true );
+            else
+                aController->setUIState( UPDATESTATE_NO_UPDATE_AVAIL, true );
+        }
+    }
+    catch( const uno::Exception& )
+    {
+        TOOLS_WARN_EXCEPTION("extensions.update", "Caught exception, thread terminated");
+    }
+}
+
+
+OUString SAL_CALL
+UpdateCheckJob::getImplementationName()
+{
+    return "vnd.sun.UpdateCheck";
+}
+
+
+uno::Sequence< OUString > SAL_CALL
+UpdateCheckJob::getSupportedServiceNames()
+{
+    return { "com.sun.star.setup.UpdateCheck" };
+}
+
+sal_Bool SAL_CALL
+UpdateCheckJob::supportsService( OUString const & serviceName )
+{
+    return cppu::supportsService(this, serviceName);
+}
+
+
+// XEventListener
+void SAL_CALL UpdateCheckJob::disposing( lang::EventObject const & rEvt )
+{
+    bool shutDown = ( rEvt.Source == m_xDesktop );
+
+    if ( shutDown && m_xDesktop.is() )
+    {
+        terminateAndJoinThread();
+        m_xDesktop->removeTerminateListener( this );
+        m_xDesktop.clear();
+    }
+}
+
+
+// XTerminateListener
+void SAL_CALL UpdateCheckJob::queryTermination( lang::EventObject const & )
+{
+}
+
+void UpdateCheckJob::terminateAndJoinThread()
+{
+    if (m_pInitThread != nullptr)
+    {
+        m_pInitThread->setTerminating();
+        m_pInitThread->join();
+        m_pInitThread.reset();
+    }
+}
+
+void SAL_CALL UpdateCheckJob::notifyTermination( lang::EventObject const & )
+{
+    terminateAndJoinThread();
+}
+
+} // anonymous namespace
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+extensions_update_UpdateCheckJob_get_implementation(
+    css::uno::XComponentContext* context , css::uno::Sequence<css::uno::Any> const&)
+{
+    css::uno::Reference<css::frame::XDesktop2> desktop(
+        css::frame::Desktop::create(context));
+    rtl::Reference<UpdateCheckJob> job(new UpdateCheckJob(context, desktop));
+    desktop->addTerminateListener(job);
+    return cppu::acquire(job.get());
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updatehdl.cxx b/extensions/source/update/check/updatehdl.cxx
new file mode 100644
index 000000000..24fb96bda
--- /dev/null
+++ b/extensions/source/update/check/updatehdl.cxx
@@ -0,0 +1,1281 @@
+/* -*- 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 "updatehdl.hxx"
+#include <helpids.h>
+
+#include <osl/diagnose.h>
+#include <osl/file.hxx>
+#include <rtl/ustring.hxx>
+
+#include <com/sun/star/uno/Sequence.h>
+
+#include <com/sun/star/awt/ActionEvent.hpp>
+#include <com/sun/star/awt/PushButtonType.hpp>
+#include <com/sun/star/awt/UnoControlDialog.hpp>
+#include <com/sun/star/awt/VclWindowPeerAttribute.hpp>
+#include <com/sun/star/awt/WindowAttribute.hpp>
+#include <com/sun/star/awt/XButton.hpp>
+#include <com/sun/star/awt/XControl.hpp>
+#include <com/sun/star/awt/XControlContainer.hpp>
+#include <com/sun/star/awt/XMessageBox.hpp>
+#include <com/sun/star/awt/XAnimation.hpp>
+#include <com/sun/star/awt/XTopWindow.hpp>
+#include <com/sun/star/awt/XVclWindowPeer.hpp>
+#include <com/sun/star/awt/XVclContainer.hpp>
+#include <com/sun/star/awt/XWindow.hpp>
+#include <com/sun/star/awt/XWindow2.hpp>
+
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+
+#include <com/sun/star/container/XNameContainer.hpp>
+
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/frame/TerminationVetoException.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/task/InteractionHandler.hpp>
+#include <com/sun/star/task/InteractionRequestStringResolver.hpp>
+
+#include <strings.hrc>
+#include <unotools/resmgr.hxx>
+#include <tools/urlobj.hxx>
+#include <tools/diagnose_ex.h>
+
+constexpr OUStringLiteral COMMAND_CLOSE = u"close";
+
+constexpr OUStringLiteral CTRL_THROBBER = u"throbber";
+constexpr OUStringLiteral CTRL_PROGRESS = u"progress";
+
+constexpr OUStringLiteral TEXT_STATUS = u"text_status";
+constexpr OUStringLiteral TEXT_PERCENT = u"text_percent";
+constexpr OUStringLiteral TEXT_DESCRIPTION = u"text_description";
+
+constexpr OUStringLiteral FIXED_LINE_MODEL = u"com.sun.star.awt.UnoControlFixedLineModel";
+constexpr OUStringLiteral FIXED_TEXT_MODEL = u"com.sun.star.awt.UnoControlFixedTextModel";
+constexpr OUStringLiteral EDIT_FIELD_MODEL = u"com.sun.star.awt.UnoControlEditModel";
+constexpr OUStringLiteral BUTTON_MODEL = u"com.sun.star.awt.UnoControlButtonModel";
+constexpr OUStringLiteral GROUP_BOX_MODEL = u"com.sun.star.awt.UnoControlGroupBoxModel";
+
+using namespace com::sun::star;
+
+
+UpdateHandler::UpdateHandler( const uno::Reference< uno::XComponentContext > & rxContext,
+                              const rtl::Reference< IActionListener > & rxActionListener ) :
+    mxContext( rxContext ),
+    mxActionListener( rxActionListener ),
+    meCurState( UPDATESTATES_COUNT ),
+    meLastState( UPDATESTATES_COUNT ),
+    mnPercent( 0 ),
+    mnLastCtrlState( -1 ),
+    mbDownloadBtnHasDots( false ),
+    mbVisible( false ),
+    mbStringsLoaded( false ),
+    mbMinimized( false ),
+    mbListenerAdded(false),
+    mbShowsMessageBox(false)
+{
+}
+
+
+UpdateHandler::~UpdateHandler()
+{
+    mxContext = nullptr;
+    mxUpdDlg = nullptr;
+    mxInteractionHdl = nullptr;
+    mxActionListener = nullptr;
+}
+
+
+void UpdateHandler::enableControls( short nCtrlState )
+{
+    osl::MutexGuard aGuard( maMutex );
+
+    if ( nCtrlState == mnLastCtrlState )
+        return;
+
+    // the help button should always be the last button in the
+    // enum list and must never be disabled
+    for ( int i=0; i<HELP_BUTTON; i++ )
+    {
+        short nCurStateVal = static_cast<short>(nCtrlState >> i);
+        short nOldStateVal = static_cast<short>(mnLastCtrlState >> i);
+        if ( ( nCurStateVal & 0x01 ) != ( nOldStateVal & 0x01 ) )
+        {
+            bool bEnableControl = ( ( nCurStateVal & 0x01 ) == 0x01 );
+            setControlProperty( msButtonIDs[i], "Enabled", uno::Any( bEnableControl ) );
+        }
+    }
+
+    mnLastCtrlState = nCtrlState;
+}
+
+
+void UpdateHandler::setDownloadBtnLabel( bool bAppendDots )
+{
+    osl::MutexGuard aGuard( maMutex );
+
+    if ( mbDownloadBtnHasDots != bAppendDots )
+    {
+        OUString aLabel( msDownload );
+
+        if ( bAppendDots )
+            aLabel += "...";
+
+        setControlProperty( msButtonIDs[DOWNLOAD_BUTTON], "Label", uno::Any( aLabel ) );
+        setControlProperty( msButtonIDs[DOWNLOAD_BUTTON], "HelpURL", uno::Any(OUString( INET_HID_SCHEME + HID_CHECK_FOR_UPD_DOWNLOAD2 )) );
+
+        mbDownloadBtnHasDots = bAppendDots;
+    }
+}
+
+
+void UpdateHandler::setState( UpdateState eState )
+{
+    osl::MutexGuard aGuard( maMutex );
+
+    meCurState = eState;
+
+    if ( mxUpdDlg.is() && mbVisible )
+        updateState( meCurState );
+}
+
+
+bool UpdateHandler::isVisible() const
+{
+    if ( !mxUpdDlg.is() ) return false;
+
+    uno::Reference< awt::XWindow2 > xWindow( mxUpdDlg, uno::UNO_QUERY );
+
+    if ( xWindow.is() )
+        return xWindow->isVisible();
+    else
+        return false;
+}
+
+
+void UpdateHandler::setVisible( bool bVisible )
+{
+    osl::MutexGuard aGuard( maMutex );
+
+    mbVisible = bVisible;
+
+    if ( bVisible )
+    {
+        if ( !mxUpdDlg.is() )
+            createDialog();
+
+        // this should never happen, but if it happens we better return here
+        if ( !mxUpdDlg.is() )
+            return;
+
+        updateState( meCurState );
+
+        uno::Reference< awt::XWindow > xWindow( mxUpdDlg, uno::UNO_QUERY );
+
+        if ( xWindow.is() )
+            xWindow->setVisible( bVisible );
+
+        uno::Reference< awt::XTopWindow > xTopWindow( mxUpdDlg, uno::UNO_QUERY );
+        if ( xTopWindow.is() )
+        {
+            xTopWindow->toFront();
+            if ( !mbListenerAdded )
+            {
+                xTopWindow->addTopWindowListener( this );
+                mbListenerAdded = true;
+            }
+        }
+    }
+    else if ( mxUpdDlg.is() )
+    {
+        uno::Reference< awt::XWindow > xWindow( mxUpdDlg, uno::UNO_QUERY );
+
+        if ( xWindow.is() )
+            xWindow->setVisible( bVisible );
+    }
+}
+
+
+void UpdateHandler::setProgress( sal_Int32 nPercent )
+{
+    if ( nPercent > 100 )
+        nPercent = 100;
+    else if ( nPercent < 0 )
+        nPercent = 0;
+
+    if ( nPercent != mnPercent )
+    {
+        osl::MutexGuard aGuard( maMutex );
+
+        mnPercent = nPercent;
+        setControlProperty( CTRL_PROGRESS, "ProgressValue", uno::Any( nPercent ) );
+        setControlProperty( TEXT_PERCENT, "Text", uno::Any( substVariables(msPercent) ) );
+    }
+}
+
+
+void UpdateHandler::setErrorMessage( const OUString& rErrorMsg )
+{
+    setControlProperty( TEXT_DESCRIPTION, "Text", uno::Any( rErrorMsg ) );
+}
+
+
+void UpdateHandler::setDownloadFile( std::u16string_view rFilePath )
+{
+    std::size_t nLast = rFilePath.rfind( '/' );
+    if ( nLast != std::u16string_view::npos )
+    {
+        msDownloadFile = rFilePath.substr( nLast+1 );
+        const OUString aDownloadURL(rFilePath.substr( 0, nLast ));
+        osl::FileBase::getSystemPathFromFileURL( aDownloadURL, msDownloadPath );
+    }
+}
+
+
+OUString UpdateHandler::getBubbleText( UpdateState eState )
+{
+    osl::MutexGuard aGuard( maMutex );
+
+    OUString sText;
+    sal_Int32 nIndex = static_cast<sal_Int32>(eState);
+
+    loadStrings();
+
+    if ( ( UPDATESTATE_UPDATE_AVAIL <= nIndex ) && ( nIndex < UPDATESTATES_COUNT ) )
+        sText = substVariables( msBubbleTexts[ nIndex - UPDATESTATE_UPDATE_AVAIL ] );
+
+    return sText;
+}
+
+
+OUString UpdateHandler::getBubbleTitle( UpdateState eState )
+{
+    osl::MutexGuard aGuard( maMutex );
+
+    OUString sText;
+    sal_Int32 nIndex = static_cast<sal_Int32>(eState);
+
+    loadStrings();
+
+    if ( ( UPDATESTATE_UPDATE_AVAIL <= nIndex ) && ( nIndex < UPDATESTATES_COUNT ) )
+        sText = substVariables( msBubbleTitles[ nIndex - UPDATESTATE_UPDATE_AVAIL] );
+
+    return sText;
+}
+
+
+OUString UpdateHandler::getDefaultInstErrMsg()
+{
+    osl::MutexGuard aGuard( maMutex );
+
+    loadStrings();
+
+    return substVariables( msInstallError );
+}
+
+// XActionListener
+
+void SAL_CALL UpdateHandler::disposing( const lang::EventObject& rEvt )
+{
+    if ( rEvt.Source == mxUpdDlg )
+        mxUpdDlg.clear();
+}
+
+
+void SAL_CALL UpdateHandler::actionPerformed( awt::ActionEvent const & rEvent )
+{
+    DialogControls eButton = BUTTON_COUNT;
+    for ( int i = 0; i < BUTTON_COUNT; i++ )
+    {
+        if ( rEvent.ActionCommand == msButtonIDs[i] )
+        {
+            eButton = static_cast<DialogControls>(i);
+            break;
+        }
+    }
+
+    if ( rEvent.ActionCommand == COMMAND_CLOSE )
+    {
+        if ( ( mnLastCtrlState & ( 1 << CLOSE_BUTTON ) ) == ( 1 << CLOSE_BUTTON ) )
+            eButton = CLOSE_BUTTON;
+        else
+            eButton = CANCEL_BUTTON;
+    }
+
+    switch ( eButton ) {
+        case CANCEL_BUTTON:
+        {
+            bool bCancel = true;
+
+            if ( ( meCurState == UPDATESTATE_DOWNLOADING ) ||
+                 ( meCurState == UPDATESTATE_DOWNLOAD_PAUSED ) ||
+                 ( meCurState == UPDATESTATE_ERROR_DOWNLOADING ) )
+                bCancel = showWarning( msCancelMessage );
+
+            if ( bCancel )
+            {
+                mxActionListener->cancel();
+                setVisible( false );
+            }
+            break;
+        }
+        case CLOSE_BUTTON:
+            setVisible( false );
+            if ( meCurState == UPDATESTATE_ERROR_CHECKING )
+                mxActionListener->closeAfterFailure();
+            break;
+        case DOWNLOAD_BUTTON:
+            mxActionListener->download();
+            break;
+        case INSTALL_BUTTON:
+            if ( showWarning( msInstallMessage ) )
+                mxActionListener->install();
+            break;
+        case PAUSE_BUTTON:
+            mxActionListener->pause();
+            break;
+        case RESUME_BUTTON:
+            mxActionListener->resume();
+            break;
+        case HELP_BUTTON:
+            break;
+        default:
+            OSL_FAIL( "UpdateHandler::actionPerformed: unknown command!" );
+    }
+}
+
+// XTopWindowListener
+
+void SAL_CALL UpdateHandler::windowOpened( const lang::EventObject& )
+{
+}
+
+
+void SAL_CALL UpdateHandler::windowClosing( const lang::EventObject& e )
+{
+    awt::ActionEvent aActionEvt;
+    aActionEvt.ActionCommand = COMMAND_CLOSE;
+    aActionEvt.Source = e.Source;
+
+    actionPerformed( aActionEvt );
+}
+
+
+void SAL_CALL UpdateHandler::windowClosed( const lang::EventObject& )
+{
+}
+
+
+void SAL_CALL UpdateHandler::windowMinimized( const lang::EventObject& )
+{
+    mbMinimized = true;
+}
+
+
+void SAL_CALL UpdateHandler::windowNormalized( const lang::EventObject& )
+{
+    mbMinimized = false;
+}
+
+
+void SAL_CALL UpdateHandler::windowActivated( const lang::EventObject& )
+{
+}
+
+
+void SAL_CALL UpdateHandler::windowDeactivated( const lang::EventObject& )
+{
+}
+
+// XInteractionHandler
+
+void SAL_CALL UpdateHandler::handle( uno::Reference< task::XInteractionRequest > const & rRequest)
+{
+    if ( !mxInteractionHdl.is() )
+    {
+        if( !mxContext.is() )
+            throw uno::RuntimeException( "UpdateHandler:: empty component context", *this );
+
+        uno::Reference< lang::XMultiComponentFactory > xServiceManager(mxContext->getServiceManager());
+
+        if( !xServiceManager.is() )
+            throw uno::RuntimeException( "UpdateHandler: unable to obtain service manager from component context", *this );
+
+        mxInteractionHdl.set(
+            task::InteractionHandler::createWithParent(mxContext, nullptr),
+            uno::UNO_QUERY_THROW);
+    }
+    uno::Reference< task::XInteractionRequestStringResolver > xStrResolver =
+            task::InteractionRequestStringResolver::create( mxContext );
+    beans::Optional< OUString > aErrorText = xStrResolver->getStringFromInformationalRequest( rRequest );
+    if ( aErrorText.IsPresent )
+    {
+        setControlProperty( TEXT_DESCRIPTION, "Text", uno::Any( aErrorText.Value ) );
+
+        uno::Sequence< uno::Reference< task::XInteractionContinuation > > xContinuations = rRequest->getContinuations();
+        if ( xContinuations.getLength() == 1 )
+        {
+            if ( meCurState == UPDATESTATE_CHECKING )
+                setState( UPDATESTATE_ERROR_CHECKING );
+            else if ( meCurState == UPDATESTATE_DOWNLOADING )
+                setState( UPDATESTATE_ERROR_DOWNLOADING );
+
+            xContinuations[0]->select();
+        }
+        else
+            mxInteractionHdl->handle( rRequest );
+    }
+    else
+        mxInteractionHdl->handle( rRequest );
+}
+
+
+// XTerminateListener
+
+void SAL_CALL UpdateHandler::queryTermination( const lang::EventObject& )
+{
+    if ( mbShowsMessageBox )
+    {
+        uno::Reference< awt::XTopWindow > xTopWindow( mxUpdDlg, uno::UNO_QUERY );
+        if ( xTopWindow.is() )
+            xTopWindow->toFront();
+
+        throw frame::TerminationVetoException(
+            "The office cannot be closed while displaying a warning!",
+            static_cast<frame::XTerminateListener*>(this));
+    }
+    else
+        setVisible( false );
+}
+
+
+void SAL_CALL UpdateHandler::notifyTermination( const lang::EventObject& )
+{
+    osl::MutexGuard aGuard( maMutex );
+
+    if ( mxUpdDlg.is() )
+    {
+        uno::Reference< awt::XTopWindow > xTopWindow( mxUpdDlg, uno::UNO_QUERY );
+        if ( xTopWindow.is() )
+            xTopWindow->removeTopWindowListener( this );
+
+        uno::Reference< lang::XComponent > xComponent( mxUpdDlg, uno::UNO_QUERY );
+        if ( xComponent.is() )
+            xComponent->dispose();
+
+        mxUpdDlg.clear();
+    }
+}
+
+
+void UpdateHandler::updateState( UpdateState eState )
+{
+    if ( meLastState == eState )
+        return;
+
+    OUString sText;
+
+    switch ( eState )
+    {
+        case UPDATESTATE_CHECKING:
+            showControls( (1<<CANCEL_BUTTON) + (1<<THROBBER_CTRL) );
+            enableControls( 1<<CANCEL_BUTTON );
+            setControlProperty( TEXT_STATUS, "Text", uno::Any( substVariables(msChecking) ) );
+            setControlProperty( TEXT_DESCRIPTION, "Text", uno::Any( OUString() ) );
+            focusControl( CANCEL_BUTTON );
+            break;
+        case UPDATESTATE_ERROR_CHECKING:
+            showControls( 0 );
+            enableControls( 1 << CLOSE_BUTTON );
+            setControlProperty( TEXT_STATUS, "Text", uno::Any( substVariables(msCheckingError) ) );
+            focusControl( CLOSE_BUTTON );
+            break;
+        case UPDATESTATE_UPDATE_AVAIL:
+            showControls( 0 );
+            enableControls( ( 1 << CLOSE_BUTTON )  + ( 1 << DOWNLOAD_BUTTON ) );
+            setControlProperty( TEXT_STATUS, "Text", uno::Any( substVariables(msUpdFound) ) );
+
+            sText = substVariables(msDownloadWarning);
+            if ( !msDescriptionMsg.isEmpty() )
+                sText += "\n\n" + msDescriptionMsg;
+            setControlProperty( TEXT_DESCRIPTION, "Text", uno::Any( sText ) );
+
+            setDownloadBtnLabel( false );
+            focusControl( DOWNLOAD_BUTTON );
+            break;
+        case UPDATESTATE_UPDATE_NO_DOWNLOAD:
+            showControls( 0 );
+            enableControls( ( 1 << CLOSE_BUTTON )  + ( 1 << DOWNLOAD_BUTTON ) );
+            setControlProperty( TEXT_STATUS, "Text", uno::Any( substVariables(msUpdFound) ) );
+
+            sText = substVariables(msDownloadNotAvail);
+            if ( !msDescriptionMsg.isEmpty() )
+                sText += "\n\n" + msDescriptionMsg;
+            setControlProperty( TEXT_DESCRIPTION, "Text", uno::Any( sText ) );
+
+            setDownloadBtnLabel( true );
+            focusControl( DOWNLOAD_BUTTON );
+            break;
+        case UPDATESTATE_NO_UPDATE_AVAIL:
+        case UPDATESTATE_EXT_UPD_AVAIL:     // will only be set, when there are no office updates avail
+            showControls( 0 );
+            enableControls( 1 << CLOSE_BUTTON );
+            setControlProperty( TEXT_STATUS, "Text", uno::Any( substVariables(msNoUpdFound) ) );
+            setControlProperty( TEXT_DESCRIPTION, "Text", uno::Any( OUString() ) );
+            focusControl( CLOSE_BUTTON );
+            break;
+        case UPDATESTATE_DOWNLOADING:
+            showControls( (1<<PROGRESS_CTRL) + (1<<CANCEL_BUTTON) + (1<<PAUSE_BUTTON) + (1<<RESUME_BUTTON) );
+            enableControls( (1<<CLOSE_BUTTON) + (1<<CANCEL_BUTTON) + (1<<PAUSE_BUTTON) );
+            setControlProperty( TEXT_STATUS, "Text", uno::Any( substVariables(msDownloading) ) );
+            setControlProperty( TEXT_PERCENT, "Text", uno::Any( substVariables(msPercent) ) );
+            setControlProperty( TEXT_DESCRIPTION, "Text", uno::Any( substVariables(msDownloadWarning) ) );
+            setControlProperty( CTRL_PROGRESS, "ProgressValue", uno::Any( mnPercent ) );
+            focusControl( CLOSE_BUTTON );
+            break;
+        case UPDATESTATE_DOWNLOAD_PAUSED:
+            showControls( (1<<PROGRESS_CTRL) + (1<<CANCEL_BUTTON) + (1<<PAUSE_BUTTON) + (1<<RESUME_BUTTON) );
+            enableControls( (1<<CLOSE_BUTTON) + (1<<CANCEL_BUTTON) + (1<<RESUME_BUTTON) );
+            setControlProperty( TEXT_STATUS, "Text", uno::Any( substVariables(msDownloadPause) ) );
+            setControlProperty( TEXT_PERCENT, "Text", uno::Any( substVariables(msPercent) ) );
+            setControlProperty( TEXT_DESCRIPTION, "Text", uno::Any( substVariables(msDownloadWarning) ) );
+            setControlProperty( CTRL_PROGRESS, "ProgressValue", uno::Any( mnPercent ) );
+            focusControl( CLOSE_BUTTON );
+            break;
+        case UPDATESTATE_ERROR_DOWNLOADING:
+            showControls( (1<<PROGRESS_CTRL) + (1<<CANCEL_BUTTON) + (1<<PAUSE_BUTTON) + (1<<RESUME_BUTTON) );
+            enableControls( (1<<CLOSE_BUTTON) + (1<<CANCEL_BUTTON) );
+            setControlProperty( TEXT_STATUS, "Text", uno::Any( substVariables(msDownloadError) ) );
+            focusControl( CLOSE_BUTTON );
+            break;
+        case UPDATESTATE_DOWNLOAD_AVAIL:
+            showControls( 0 );
+            enableControls( (1<<CLOSE_BUTTON) + (1<<INSTALL_BUTTON) );
+            setControlProperty( TEXT_STATUS, "Text", uno::Any( substVariables(msReady2Install) ) );
+            setControlProperty( TEXT_DESCRIPTION, "Text", uno::Any( substVariables(msDownloadDescr) ) );
+            focusControl( INSTALL_BUTTON );
+            break;
+        case UPDATESTATE_AUTO_START:
+        case UPDATESTATES_COUNT:
+            //do nothing, only count!
+            break;
+    }
+
+    meLastState = eState;
+}
+
+OUString UpdateHandler::loadString(const std::locale& rLocale,
+                                   TranslateId pResourceId)
+{
+    return Translate::get(pResourceId, rLocale);
+}
+
+OUString UpdateHandler::substVariables( const OUString &rSource ) const
+{
+    return rSource
+        .replaceAll( "%NEXTVERSION", msNextVersion )
+        .replaceAll( "%DOWNLOAD_PATH", msDownloadPath )
+        .replaceAll( "%FILE_NAME", msDownloadFile )
+        .replaceAll( "%PERCENT", OUString::number( mnPercent ) );
+}
+
+void UpdateHandler::loadStrings()
+{
+    if ( mbStringsLoaded )
+        return;
+    else
+        mbStringsLoaded = true;
+
+    std::locale loc = Translate::Create("pcr");
+
+    msChecking      = loadString( loc, RID_UPDATE_STR_CHECKING );
+    msCheckingError = loadString( loc, RID_UPDATE_STR_CHECKING_ERR );
+    msNoUpdFound    = loadString( loc, RID_UPDATE_STR_NO_UPD_FOUND );
+
+    msUpdFound      = loadString( loc, RID_UPDATE_STR_UPD_FOUND );
+    setFullVersion( msUpdFound );
+
+    msDlgTitle      = loadString( loc, RID_UPDATE_STR_DLG_TITLE );
+    msDownloadPause = loadString( loc, RID_UPDATE_STR_DOWNLOAD_PAUSE );
+    msDownloadError = loadString( loc, RID_UPDATE_STR_DOWNLOAD_ERR );
+    msDownloadWarning = loadString( loc, RID_UPDATE_STR_DOWNLOAD_WARN );
+    msDownloadDescr =  loadString( loc, RID_UPDATE_STR_DOWNLOAD_DESCR );
+    msDownloadNotAvail = loadString( loc, RID_UPDATE_STR_DOWNLOAD_UNAVAIL );
+    msDownloading   = loadString( loc, RID_UPDATE_STR_DOWNLOADING );
+    msReady2Install = loadString( loc, RID_UPDATE_STR_READY_INSTALL );
+    msCancelMessage = loadString( loc, RID_UPDATE_STR_CANCEL_DOWNLOAD );
+    msInstallMessage = loadString( loc, RID_UPDATE_STR_BEGIN_INSTALL );
+    msInstallError  = loadString( loc, RID_UPDATE_STR_INSTALL_ERROR );
+    msOverwriteWarning = loadString( loc, RID_UPDATE_STR_OVERWRITE_WARNING );
+    msPercent       = loadString( loc, RID_UPDATE_STR_PERCENT );
+    msReloadWarning = loadString( loc, RID_UPDATE_STR_RELOAD_WARNING );
+    msReloadReload  = loadString( loc, RID_UPDATE_STR_RELOAD_RELOAD );
+    msReloadContinue = loadString( loc, RID_UPDATE_STR_RELOAD_CONTINUE );
+
+    msStatusFL      = loadString( loc, RID_UPDATE_FT_STATUS );
+    msDescription   = loadString( loc, RID_UPDATE_FT_DESCRIPTION );
+
+    msClose         = loadString( loc, RID_UPDATE_BTN_CLOSE );
+    msDownload      = loadString( loc, RID_UPDATE_BTN_DOWNLOAD );
+    msInstall       = loadString( loc, RID_UPDATE_BTN_INSTALL );
+    msPauseBtn      = loadString( loc, RID_UPDATE_BTN_PAUSE );
+    msResumeBtn     = loadString( loc, RID_UPDATE_BTN_RESUME );
+    msCancelBtn     = loadString( loc, RID_UPDATE_BTN_CANCEL );
+
+    std::pair<TranslateId, TranslateId> RID_UPDATE_BUBBLE[] =
+    {
+        { RID_UPDATE_BUBBLE_UPDATE_AVAIL, RID_UPDATE_BUBBLE_T_UPDATE_AVAIL },
+        { RID_UPDATE_BUBBLE_UPDATE_NO_DOWN, RID_UPDATE_BUBBLE_T_UPDATE_NO_DOWN },
+        { RID_UPDATE_BUBBLE_AUTO_START, RID_UPDATE_BUBBLE_T_AUTO_START },
+        { RID_UPDATE_BUBBLE_DOWNLOADING, RID_UPDATE_BUBBLE_T_DOWNLOADING },
+        { RID_UPDATE_BUBBLE_DOWNLOAD_PAUSED, RID_UPDATE_BUBBLE_T_DOWNLOAD_PAUSED },
+        { RID_UPDATE_BUBBLE_ERROR_DOWNLOADING, RID_UPDATE_BUBBLE_T_ERROR_DOWNLOADING },
+        { RID_UPDATE_BUBBLE_DOWNLOAD_AVAIL, RID_UPDATE_BUBBLE_T_DOWNLOAD_AVAIL },
+        { RID_UPDATE_BUBBLE_EXT_UPD_AVAIL, RID_UPDATE_BUBBLE_T_EXT_UPD_AVAIL }
+    };
+
+    static_assert(SAL_N_ELEMENTS(RID_UPDATE_BUBBLE) == UPDATESTATES_COUNT - UPDATESTATE_UPDATE_AVAIL, "mismatch");
+
+    // all update states before UPDATESTATE_UPDATE_AVAIL don't have a bubble
+    // so we can ignore them
+    for (size_t i = 0; i < SAL_N_ELEMENTS(RID_UPDATE_BUBBLE); ++i)
+    {
+        msBubbleTexts[i] = loadString(loc, RID_UPDATE_BUBBLE[i].first);
+        msBubbleTitles[i] = loadString(loc, RID_UPDATE_BUBBLE[i].second);
+    }
+
+    for ( int i=0; i < BUTTON_COUNT; i++ )
+    {
+        msButtonIDs[ i ] = "BUTTON_" + OUString::number( i );
+    }
+}
+
+
+void UpdateHandler::startThrobber( bool bStart )
+{
+    uno::Reference< awt::XControlContainer > xContainer( mxUpdDlg, uno::UNO_QUERY );
+    uno::Reference< awt::XAnimation > xThrobber( xContainer->getControl( CTRL_THROBBER ), uno::UNO_QUERY );
+
+    if ( xThrobber.is() )
+    {
+        if ( bStart )
+            xThrobber->startAnimation();
+        else
+            xThrobber->stopAnimation();
+    }
+
+    uno::Reference< awt::XWindow > xWindow( xContainer->getControl( CTRL_THROBBER ), uno::UNO_QUERY );
+    if (xWindow.is() )
+        xWindow->setVisible( bStart );
+}
+
+
+void UpdateHandler::setControlProperty( const OUString &rCtrlName,
+                                        const OUString &rPropName,
+                                        const uno::Any &rPropValue )
+{
+    if ( !mxUpdDlg.is() ) return;
+
+    uno::Reference< awt::XControlContainer > xContainer( mxUpdDlg, uno::UNO_QUERY );
+    uno::Reference< awt::XControl > xControl( xContainer->getControl( rCtrlName ), uno::UNO_SET_THROW );
+    uno::Reference< awt::XControlModel > xControlModel( xControl->getModel(), uno::UNO_SET_THROW );
+    uno::Reference< beans::XPropertySet > xPropSet( xControlModel, uno::UNO_QUERY_THROW );
+
+    try {
+        xPropSet->setPropertyValue( rPropName, rPropValue );
+    }
+    catch( const beans::UnknownPropertyException& )
+    {
+        TOOLS_WARN_EXCEPTION( "extensions.update", "UpdateHandler::setControlProperty" );
+    }
+}
+
+
+void UpdateHandler::showControl( const OUString &rCtrlName, bool bShow )
+{
+    uno::Reference< awt::XControlContainer > xContainer( mxUpdDlg, uno::UNO_QUERY );
+
+    if ( !xContainer.is() )
+    {
+        OSL_FAIL( "UpdateHandler::showControl: could not get control container!" );
+        return;
+    }
+
+    uno::Reference< awt::XWindow > xWindow( xContainer->getControl( rCtrlName ), uno::UNO_QUERY );
+    if ( xWindow.is() )
+        xWindow->setVisible( bShow );
+}
+
+
+void UpdateHandler::focusControl( DialogControls eID )
+{
+    uno::Reference< awt::XControlContainer > xContainer( mxUpdDlg, uno::UNO_QUERY );
+
+    if ( !xContainer.is() )
+    {
+        OSL_FAIL( "UpdateHandler::focusControl: could not get control container!" );
+        return;
+    }
+
+    OSL_ENSURE( (eID < BUTTON_COUNT), "UpdateHandler::focusControl: id too big!" );
+
+    uno::Reference< awt::XWindow > xWindow( xContainer->getControl( msButtonIDs[static_cast<short>(eID)] ), uno::UNO_QUERY );
+    if ( xWindow.is() )
+        xWindow->setFocus();
+}
+
+
+void UpdateHandler::insertControlModel( uno::Reference< awt::XControlModel > const & rxDialogModel,
+                                        OUString const & rServiceName,
+                                        OUString const & rControlName,
+                                        awt::Rectangle const & rPosSize,
+                                        uno::Sequence< beans::NamedValue > const & rProps )
+{
+    uno::Reference< lang::XMultiServiceFactory > xFactory (rxDialogModel, uno::UNO_QUERY_THROW);
+    uno::Reference< awt::XControlModel > xModel (xFactory->createInstance (rServiceName), uno::UNO_QUERY_THROW);
+    uno::Reference< beans::XPropertySet > xPropSet (xModel, uno::UNO_QUERY_THROW);
+
+    for (beans::NamedValue const & prop : rProps)
+    {
+        xPropSet->setPropertyValue (prop.Name, prop.Value);
+    }
+
+    // @see awt/UnoControlDialogElement.idl
+    xPropSet->setPropertyValue( "Name", uno::Any (rControlName) );
+    xPropSet->setPropertyValue( "PositionX", uno::Any (rPosSize.X) );
+    xPropSet->setPropertyValue( "PositionY", uno::Any (rPosSize.Y) );
+    xPropSet->setPropertyValue( "Height", uno::Any (rPosSize.Height) );
+    xPropSet->setPropertyValue( "Width", uno::Any (rPosSize.Width) );
+
+    // insert by Name into DialogModel container
+    uno::Reference< container::XNameContainer > xContainer (rxDialogModel, uno::UNO_QUERY_THROW);
+    xContainer->insertByName( rControlName, uno::Any (uno::Reference< uno::XInterface >(xModel, uno::UNO_QUERY)));
+}
+
+
+void UpdateHandler::setFullVersion( OUString& rString )
+{
+    uno::Reference< lang::XMultiServiceFactory > xConfigurationProvider(
+        css::configuration::theDefaultProvider::get( mxContext ) );
+
+    beans::PropertyValue aProperty;
+    aProperty.Name  = "nodepath";
+    aProperty.Value <<= OUString("org.openoffice.Setup/Product");
+
+    uno::Sequence< uno::Any > aArgumentList{ uno::Any(aProperty) };
+
+    uno::Reference< uno::XInterface > xConfigAccess = xConfigurationProvider->createInstanceWithArguments( "com.sun.star.configuration.ConfigurationAccess",
+                                                                         aArgumentList );
+
+    uno::Reference< container::XNameAccess > xNameAccess( xConfigAccess, uno::UNO_QUERY_THROW );
+
+    OUString aProductVersion;
+    xNameAccess->getByName("ooSetupVersion") >>= aProductVersion;
+    OUString aProductFullVersion;
+    xNameAccess->getByName("ooSetupVersionAboutBox") >>= aProductFullVersion;
+    rString = rString.replaceFirst( aProductVersion, aProductFullVersion );
+}
+
+
+bool UpdateHandler::showWarning( const OUString &rWarningText ) const
+{
+    bool bRet = false;
+
+    uno::Reference< awt::XControl > xControl( mxUpdDlg, uno::UNO_QUERY );
+    if ( !xControl.is() ) return bRet;
+
+    uno::Reference< awt::XWindowPeer > xPeer = xControl->getPeer();
+    if ( !xPeer.is() ) return bRet;
+
+    uno::Reference< awt::XToolkit > xToolkit = xPeer->getToolkit();
+    if ( !xToolkit.is() ) return bRet;
+
+    awt::WindowDescriptor aDescriptor;
+
+    sal_Int32 nWindowAttributes = awt::WindowAttribute::BORDER | awt::WindowAttribute::MOVEABLE | awt::WindowAttribute::CLOSEABLE;
+    nWindowAttributes |= awt::VclWindowPeerAttribute::YES_NO;
+    nWindowAttributes |= awt::VclWindowPeerAttribute::DEF_NO;
+
+    aDescriptor.Type              = awt::WindowClass_MODALTOP;
+    aDescriptor.WindowServiceName = "warningbox";
+    aDescriptor.ParentIndex       = -1;
+    aDescriptor.Parent            = xPeer;
+    aDescriptor.Bounds            = awt::Rectangle( 10, 10, 250, 150 );
+    aDescriptor.WindowAttributes  = nWindowAttributes;
+
+    uno::Reference< awt::XMessageBox > xMsgBox( xToolkit->createWindow( aDescriptor ), uno::UNO_QUERY );
+    if ( xMsgBox.is() )
+    {
+        mbShowsMessageBox = true;
+        sal_Int16 nRet;
+        // xMsgBox->setCaptionText( msCancelTitle );
+        xMsgBox->setMessageText( rWarningText );
+        nRet = xMsgBox->execute();
+        if ( nRet == 2 ) // RET_YES == 2
+            bRet = true;
+        mbShowsMessageBox = false;
+    }
+
+    uno::Reference< lang::XComponent > xComponent( xMsgBox, uno::UNO_QUERY );
+    if ( xComponent.is() )
+        xComponent->dispose();
+
+    return bRet;
+}
+
+
+bool UpdateHandler::showWarning( const OUString &rWarningText,
+                                 const OUString &rBtnText_1,
+                                 const OUString &rBtnText_2 ) const
+{
+    bool bRet = false;
+
+    uno::Reference< awt::XControl > xControl( mxUpdDlg, uno::UNO_QUERY );
+    if ( !xControl.is() ) return bRet;
+
+    uno::Reference< awt::XWindowPeer > xPeer = xControl->getPeer();
+    if ( !xPeer.is() ) return bRet;
+
+    uno::Reference< awt::XToolkit > xToolkit = xPeer->getToolkit();
+    if ( !xToolkit.is() ) return bRet;
+
+    awt::WindowDescriptor aDescriptor;
+
+    sal_Int32 nWindowAttributes = awt::WindowAttribute::BORDER | awt::WindowAttribute::MOVEABLE | awt::WindowAttribute::CLOSEABLE;
+    nWindowAttributes |= awt::VclWindowPeerAttribute::YES_NO;
+    nWindowAttributes |= awt::VclWindowPeerAttribute::DEF_NO;
+
+    aDescriptor.Type              = awt::WindowClass_MODALTOP;
+    aDescriptor.WindowServiceName = "warningbox";
+    aDescriptor.ParentIndex       = -1;
+    aDescriptor.Parent            = xPeer;
+    aDescriptor.Bounds            = awt::Rectangle( 10, 10, 250, 150 );
+    aDescriptor.WindowAttributes  = nWindowAttributes;
+
+    uno::Reference< awt::XMessageBox > xMsgBox( xToolkit->createWindow( aDescriptor ), uno::UNO_QUERY );
+    if ( xMsgBox.is() )
+    {
+        uno::Reference< awt::XVclContainer > xMsgBoxCtrls( xMsgBox, uno::UNO_QUERY );
+        if ( xMsgBoxCtrls.is() )
+        {
+            uno::Sequence< uno::Reference< awt::XWindow > > xChildren = xMsgBoxCtrls->getWindows();
+
+            for ( uno::Reference< awt::XWindow > const & child : std::as_const(xChildren) )
+            {
+                uno::Reference< awt::XVclWindowPeer > xMsgBoxCtrl( child, uno::UNO_QUERY );
+                if ( xMsgBoxCtrl.is() )
+                {
+                    bool bIsDefault = true;
+                    uno::Any aValue = xMsgBoxCtrl->getProperty( "DefaultButton" );
+                    aValue >>= bIsDefault;
+                    if ( bIsDefault )
+                        xMsgBoxCtrl->setProperty( "Text", uno::Any( rBtnText_1 ) );
+                    else
+                        xMsgBoxCtrl->setProperty( "Text", uno::Any( rBtnText_2 ) );
+                }
+            }
+        }
+
+        sal_Int16 nRet;
+        // xMsgBox->setCaptionText( msCancelTitle );
+        mbShowsMessageBox = true;
+        xMsgBox->setMessageText( rWarningText );
+        nRet = xMsgBox->execute();
+        if ( nRet == 2 ) // RET_YES == 2
+            bRet = true;
+
+        mbShowsMessageBox = false;
+    }
+
+    uno::Reference< lang::XComponent > xComponent( xMsgBox, uno::UNO_QUERY );
+    if ( xComponent.is() )
+        xComponent->dispose();
+
+    return bRet;
+}
+
+
+bool UpdateHandler::showOverwriteWarning( std::u16string_view rFileName ) const
+{
+    return showWarning(
+        (msReloadWarning
+         .replaceAll( "%FILENAME", rFileName )
+         .replaceAll( "%DOWNLOAD_PATH", msDownloadPath )),
+        msReloadContinue, msReloadReload );
+}
+
+
+bool UpdateHandler::showOverwriteWarning() const
+{
+    return showWarning( msOverwriteWarning );
+}
+
+
+#define BUTTON_HEIGHT       14
+#define BUTTON_WIDTH        50
+#define BUTTON_X_OFFSET      7
+#define BUTTON_Y_OFFSET      3
+#define LABEL_HEIGHT        10
+
+#define DIALOG_WIDTH       300
+#define DIALOG_BORDER        5
+#define INNER_BORDER         3
+#define TEXT_OFFSET          1
+#define BOX_HEIGHT1          ( LABEL_HEIGHT + 3*BUTTON_HEIGHT + 2*BUTTON_Y_OFFSET + 2*INNER_BORDER )
+#define BOX_HEIGHT2         50
+#define EDIT_WIDTH          ( DIALOG_WIDTH - 2 * DIALOG_BORDER )
+#define BOX1_BTN_X          ( DIALOG_BORDER + EDIT_WIDTH - BUTTON_WIDTH - INNER_BORDER )
+#define BOX1_BTN_Y          ( DIALOG_BORDER + LABEL_HEIGHT + INNER_BORDER)
+#define THROBBER_WIDTH      16
+#define THROBBER_HEIGHT     16
+#define THROBBER_X_POS      ( DIALOG_BORDER + 8 )
+#define THROBBER_Y_POS      ( DIALOG_BORDER + 23 )
+#define BUTTON_BAR_HEIGHT   24
+#define LABEL_OFFSET        ( LABEL_HEIGHT + 4 )
+#define DIALOG_HEIGHT       ( BOX_HEIGHT1 + BOX_HEIGHT2 + LABEL_OFFSET + BUTTON_BAR_HEIGHT + 3 * DIALOG_BORDER )
+#define LABEL_Y_POS         ( 2 * DIALOG_BORDER + BOX_HEIGHT1 )
+#define EDIT2_Y_POS         ( LABEL_Y_POS + LABEL_HEIGHT )
+#define BUTTON_BAR_Y_POS    ( EDIT2_Y_POS + DIALOG_BORDER + BOX_HEIGHT2 )
+#define BUTTON_Y_POS        ( BUTTON_BAR_Y_POS + 8 )
+#define CLOSE_BTN_X         ( DIALOG_WIDTH - DIALOG_BORDER - BUTTON_WIDTH )
+#define INSTALL_BTN_X       ( CLOSE_BTN_X - 2 * BUTTON_X_OFFSET - BUTTON_WIDTH )
+#define DOWNLOAD_BTN_X      ( INSTALL_BTN_X - BUTTON_X_OFFSET - BUTTON_WIDTH )
+#define PROGRESS_WIDTH      80
+#define PROGRESS_HEIGHT     10
+#define PROGRESS_X_POS      ( DIALOG_BORDER + 8 )
+#define PROGRESS_Y_POS      ( DIALOG_BORDER + 2*LABEL_OFFSET )
+
+
+void UpdateHandler::showControls( short nControls )
+{
+    // The buttons from CANCEL_BUTTON to RESUME_BUTTON will be shown or
+    // hidden on demand
+    short nShiftMe;
+    for ( int i = 0; i <= int(RESUME_BUTTON); i++ )
+    {
+        nShiftMe = static_cast<short>(nControls >> i);
+        showControl( msButtonIDs[i], static_cast<bool>(nShiftMe & 0x01) );
+    }
+
+    nShiftMe = static_cast<short>(nControls >> THROBBER_CTRL);
+    startThrobber( static_cast<bool>(nShiftMe & 0x01) );
+
+    nShiftMe = static_cast<short>(nControls >> PROGRESS_CTRL);
+    showControl( CTRL_PROGRESS, static_cast<bool>(nShiftMe & 0x01) );
+    showControl( TEXT_PERCENT, static_cast<bool>(nShiftMe & 0x01) );
+
+    // Status text needs to be smaller, when there are buttons at the right side of the dialog
+    if ( ( nControls & ( (1<<CANCEL_BUTTON) + (1<<PAUSE_BUTTON) + (1<<RESUME_BUTTON) ) )  != 0 )
+        setControlProperty( TEXT_STATUS, "Width", uno::Any( sal_Int32(EDIT_WIDTH - BUTTON_WIDTH - 2*INNER_BORDER - TEXT_OFFSET ) ) );
+    else
+        setControlProperty( TEXT_STATUS, "Width", uno::Any( sal_Int32(EDIT_WIDTH - 2*TEXT_OFFSET ) ) );
+
+    // Status text needs to be taller, when we show the progress bar
+    if ( ( nControls & ( 1<<PROGRESS_CTRL ) ) != 0 )
+        setControlProperty( TEXT_STATUS, "Height", uno::Any( sal_Int32(LABEL_HEIGHT) ) );
+    else
+        setControlProperty( TEXT_STATUS, "Height", uno::Any( sal_Int32(BOX_HEIGHT1 - 4*TEXT_OFFSET - LABEL_HEIGHT ) ) );
+}
+
+
+void UpdateHandler::createDialog()
+{
+    if ( !mxContext.is() )
+    {
+        OSL_ASSERT( false );
+        return;
+    }
+
+    if( mxContext.is() )
+    {
+        uno::Reference< frame::XDesktop2 > xDesktop = frame::Desktop::create( mxContext );
+        xDesktop->addTerminateListener( this );
+    }
+
+    loadStrings();
+
+    uno::Reference< lang::XMultiComponentFactory > xFactory( mxContext->getServiceManager(), uno::UNO_SET_THROW );
+    uno::Reference< awt::XControlModel > xControlModel( xFactory->createInstanceWithContext(
+                                                         "com.sun.star.awt.UnoControlDialogModel",
+                                                         mxContext), uno::UNO_QUERY_THROW );
+    {
+        // @see awt/UnoControlDialogModel.idl
+        uno::Reference< beans::XPropertySet > xPropSet( xControlModel, uno::UNO_QUERY_THROW );
+
+        xPropSet->setPropertyValue( "Title", uno::Any( msDlgTitle ) );
+        xPropSet->setPropertyValue( "Closeable", uno::Any( true ) );
+        xPropSet->setPropertyValue( "Enabled", uno::Any( true ) );
+        xPropSet->setPropertyValue( "Moveable", uno::Any( true ) );
+        xPropSet->setPropertyValue( "Sizeable", uno::Any( true ) );
+        xPropSet->setPropertyValue( "DesktopAsParent", uno::Any( true ) );
+        xPropSet->setPropertyValue( "PositionX", uno::Any(sal_Int32( 100 )) );
+        xPropSet->setPropertyValue( "PositionY", uno::Any(sal_Int32( 100 )) );
+        xPropSet->setPropertyValue( "Width", uno::Any(sal_Int32( DIALOG_WIDTH )) );
+        xPropSet->setPropertyValue( "Height", uno::Any(sal_Int32( DIALOG_HEIGHT )) );
+        xPropSet->setPropertyValue( "HelpURL", uno::Any(OUString( INET_HID_SCHEME + HID_CHECK_FOR_UPD_DLG )) );
+    }
+    {   // Label (fixed text) <status>
+        uno::Sequence< beans::NamedValue > aProps { { "Label", uno::Any( msStatusFL ) } };
+
+        insertControlModel( xControlModel, FIXED_TEXT_MODEL, "fixedLineStatus",
+                            awt::Rectangle( DIALOG_BORDER+1, DIALOG_BORDER, EDIT_WIDTH-2, LABEL_HEIGHT ),
+                            aProps );
+    }
+    {   // box around <status> text
+        uno::Sequence< beans::NamedValue > aProps;
+
+        insertControlModel( xControlModel, GROUP_BOX_MODEL, "StatusBox",
+                            awt::Rectangle( DIALOG_BORDER, DIALOG_BORDER + LABEL_HEIGHT, EDIT_WIDTH, BOX_HEIGHT1 - LABEL_HEIGHT ),
+                            aProps );
+    }
+    {   // Text (multiline edit) <status>
+        uno::Sequence< beans::NamedValue > aProps
+        {
+            { "Text", uno::Any( substVariables(msChecking) ) },
+            { "Border", uno::Any( sal_Int16( 0 ) ) },
+            { "PaintTransparent", uno::Any( true ) },
+            { "MultiLine", uno::Any( true ) },
+            { "ReadOnly", uno::Any( true ) },
+            { "AutoVScroll", uno::Any( true ) },
+            { "HelpURL", uno::Any(OUString( INET_HID_SCHEME + HID_CHECK_FOR_UPD_STATUS )) }
+        };
+
+        insertControlModel( xControlModel, EDIT_FIELD_MODEL, TEXT_STATUS,
+                            awt::Rectangle( DIALOG_BORDER + TEXT_OFFSET,
+                                            DIALOG_BORDER + LABEL_HEIGHT + TEXT_OFFSET,
+                                            EDIT_WIDTH - 2*TEXT_OFFSET,
+                                            BOX_HEIGHT1 - 4*TEXT_OFFSET - LABEL_HEIGHT ),
+                            aProps );
+    }
+    {   // Text (edit) <percent>
+        uno::Sequence< beans::NamedValue > aProps
+        {
+            { "Text", uno::Any( substVariables(msPercent) ) },
+            { "Border", uno::Any( sal_Int16( 0 ) ) },
+            { "PaintTransparent", uno::Any( true ) },
+            { "ReadOnly", uno::Any( true ) },
+        };
+
+        insertControlModel( xControlModel, EDIT_FIELD_MODEL, TEXT_PERCENT,
+                            awt::Rectangle( PROGRESS_X_POS + PROGRESS_WIDTH + DIALOG_BORDER,
+                                            PROGRESS_Y_POS,
+                                            EDIT_WIDTH - PROGRESS_WIDTH - BUTTON_WIDTH - 2*DIALOG_BORDER,
+                                            LABEL_HEIGHT ),
+                            aProps );
+    }
+    {   // pause button
+        uno::Sequence< beans::NamedValue > aProps
+        {
+            { "DefaultButton", uno::Any( false ) },
+            { "Enabled", uno::Any( true ) },
+            { "PushButtonType", uno::Any( sal_Int16(awt::PushButtonType_STANDARD) ) },
+            { "Label", uno::Any( msPauseBtn ) },
+            { "HelpURL", uno::Any(OUString( INET_HID_SCHEME + HID_CHECK_FOR_UPD_PAUSE )) }
+        };
+
+        insertControlModel ( xControlModel, BUTTON_MODEL, msButtonIDs[PAUSE_BUTTON],
+                             awt::Rectangle( BOX1_BTN_X, BOX1_BTN_Y, BUTTON_WIDTH, BUTTON_HEIGHT ),
+                             aProps );
+    }
+    {   // resume button
+        uno::Sequence< beans::NamedValue > aProps
+        {
+            { "DefaultButton", uno::Any( false ) },
+            { "Enabled", uno::Any( true ) },
+            { "PushButtonType", uno::Any( sal_Int16(awt::PushButtonType_STANDARD) ) },
+            { "Label", uno::Any( msResumeBtn ) },
+            { "HelpURL", uno::Any(OUString( INET_HID_SCHEME + HID_CHECK_FOR_UPD_RESUME )) }
+        };
+
+        insertControlModel ( xControlModel, BUTTON_MODEL, msButtonIDs[RESUME_BUTTON],
+                             awt::Rectangle( BOX1_BTN_X,
+                                             BOX1_BTN_Y + BUTTON_Y_OFFSET + BUTTON_HEIGHT,
+                                             BUTTON_WIDTH,
+                                             BUTTON_HEIGHT ),
+                             aProps );
+    }
+    {   // abort button
+        uno::Sequence< beans::NamedValue > aProps
+        {
+            { "DefaultButton", uno::Any( false ) },
+            { "Enabled", uno::Any( true ) },
+            { "PushButtonType", uno::Any( sal_Int16(awt::PushButtonType_STANDARD) ) },
+            { "Label", uno::Any( msCancelBtn ) },
+            { "HelpURL", uno::Any(OUString( INET_HID_SCHEME + HID_CHECK_FOR_UPD_CANCEL )) }
+        };
+
+        insertControlModel ( xControlModel, BUTTON_MODEL, msButtonIDs[CANCEL_BUTTON],
+                             awt::Rectangle( BOX1_BTN_X,
+                                             BOX1_BTN_Y + (2*(BUTTON_HEIGHT+BUTTON_Y_OFFSET)),
+                                             BUTTON_WIDTH,
+                                             BUTTON_HEIGHT ),
+                             aProps );
+    }
+    {   // Label (FixedText) <description>
+        uno::Sequence< beans::NamedValue > aProps { { "Label", uno::Any( msDescription ) } };
+
+        insertControlModel( xControlModel, FIXED_TEXT_MODEL, "fixedTextDescription",
+                            awt::Rectangle( DIALOG_BORDER+1, LABEL_Y_POS, EDIT_WIDTH-2, LABEL_HEIGHT ),
+                            aProps );
+    }
+    {   // box around <description> text
+        uno::Sequence< beans::NamedValue > aProps;
+
+        insertControlModel( xControlModel, GROUP_BOX_MODEL, "DescriptionBox",
+                            awt::Rectangle( DIALOG_BORDER, EDIT2_Y_POS, EDIT_WIDTH, BOX_HEIGHT2 ),
+                            aProps );
+    }
+    {   // Text (MultiLineEdit) <description>
+        uno::Sequence< beans::NamedValue > aProps
+        {
+            { "Text", uno::Any( OUString() ) },
+            { "Border", uno::Any( sal_Int16( 0 ) ) },
+            { "PaintTransparent", uno::Any( true ) },
+            { "MultiLine", uno::Any( true ) },
+            { "ReadOnly", uno::Any( true ) },
+            { "AutoVScroll", uno::Any( true ) },
+            { "HelpURL", uno::Any(OUString( INET_HID_SCHEME + HID_CHECK_FOR_UPD_DESCRIPTION )) }
+        };
+
+        insertControlModel( xControlModel, EDIT_FIELD_MODEL, TEXT_DESCRIPTION,
+                            awt::Rectangle( DIALOG_BORDER + TEXT_OFFSET,
+                                            EDIT2_Y_POS + 2*TEXT_OFFSET,
+                                            EDIT_WIDTH - 3*TEXT_OFFSET,
+                                            BOX_HEIGHT2 - 3*TEXT_OFFSET ),
+                            aProps );
+    }
+    {   // @see awt/UnoControlFixedLineModel.idl
+        uno::Sequence< beans::NamedValue > aProps { { "Orientation", uno::Any( sal_Int32( 0 ) ) } };
+
+        insertControlModel( xControlModel, FIXED_LINE_MODEL, "fixedLine",
+                            awt::Rectangle( 0, BUTTON_BAR_Y_POS, DIALOG_WIDTH, 5 ),
+                            aProps );
+    }
+    {   // close button // @see awt/UnoControlButtonModel.idl
+        uno::Sequence< beans::NamedValue > aProps
+        {
+            { "DefaultButton", uno::Any( false ) },
+            { "Enabled", uno::Any( true ) },
+            // [property] short PushButtonType
+            // with own "ButtonActionListener"
+            { "PushButtonType", uno::Any( sal_Int16(awt::PushButtonType_STANDARD) ) },
+            // with default ActionListener => endDialog().
+            // setProperty( aProps, 2, "PushButtonType", uno::Any( sal_Int16(awt::PushButtonType_CANCEL) ) );
+            // [property] string Label // only if PushButtonType_STANDARD
+            { "Label", uno::Any( msClose ) },
+            { "HelpURL", uno::Any(OUString( INET_HID_SCHEME + HID_CHECK_FOR_UPD_CLOSE )) }
+        };
+
+        insertControlModel ( xControlModel, BUTTON_MODEL, msButtonIDs[ CLOSE_BUTTON ],
+                             awt::Rectangle( CLOSE_BTN_X, BUTTON_Y_POS, BUTTON_WIDTH, BUTTON_HEIGHT ),
+                             aProps );
+    }
+    {   // install button
+        uno::Sequence< beans::NamedValue > aProps
+        {
+            { "DefaultButton", uno::Any( false ) },
+            { "Enabled", uno::Any( true ) },
+            { "PushButtonType", uno::Any( sal_Int16(awt::PushButtonType_STANDARD) ) },
+            { "Label", uno::Any( msInstall ) },
+            { "HelpURL", uno::Any(OUString( INET_HID_SCHEME + HID_CHECK_FOR_UPD_INSTALL )) }
+        };
+
+        insertControlModel ( xControlModel, BUTTON_MODEL, msButtonIDs[INSTALL_BUTTON],
+                             awt::Rectangle( INSTALL_BTN_X, BUTTON_Y_POS, BUTTON_WIDTH, BUTTON_HEIGHT ),
+                             aProps );
+    }
+    {   // download button
+        uno::Sequence< beans::NamedValue > aProps
+        {
+            { "DefaultButton", uno::Any( false ) },
+            { "Enabled", uno::Any( true ) },
+            { "PushButtonType", uno::Any( sal_Int16(awt::PushButtonType_STANDARD) ) },
+            { "Label", uno::Any( msDownload ) },
+            { "HelpURL", uno::Any(OUString( INET_HID_SCHEME + HID_CHECK_FOR_UPD_DOWNLOAD )) }
+        };
+
+        insertControlModel ( xControlModel, BUTTON_MODEL, msButtonIDs[DOWNLOAD_BUTTON],
+                             awt::Rectangle( DOWNLOAD_BTN_X, BUTTON_Y_POS, BUTTON_WIDTH, BUTTON_HEIGHT ),
+                             aProps );
+    }
+    {   // help button
+        uno::Sequence< beans::NamedValue > aProps
+        {
+            { "DefaultButton", uno::Any( false ) },
+            { "Enabled", uno::Any( true ) },
+            { "PushButtonType", uno::Any( sal_Int16(awt::PushButtonType_HELP) ) }
+        };
+
+        insertControlModel( xControlModel, BUTTON_MODEL, msButtonIDs[HELP_BUTTON],
+                            awt::Rectangle( DIALOG_BORDER, BUTTON_Y_POS, BUTTON_WIDTH, BUTTON_HEIGHT ),
+                            aProps );
+    }
+    {   // @see awt/UnoControlThrobberModel.idl
+        uno::Sequence< beans::NamedValue > aProps;
+
+        insertControlModel( xControlModel, "com.sun.star.awt.SpinningProgressControlModel", CTRL_THROBBER,
+                            awt::Rectangle( THROBBER_X_POS, THROBBER_Y_POS, THROBBER_WIDTH, THROBBER_HEIGHT),
+                            aProps );
+    }
+    {    // @see awt/UnoControlProgressBarModel.idl
+        uno::Sequence< beans::NamedValue > aProps
+        {
+            { "Enabled", uno::Any( true ) },
+            { "ProgressValue", uno::Any( sal_Int32( 0 ) ) },
+            { "ProgressValueMax", uno::Any( sal_Int32( 100 ) ) },
+            { "ProgressValueMin", uno::Any( sal_Int32( 0 ) ) },
+        };
+        insertControlModel( xControlModel, "com.sun.star.awt.UnoControlProgressBarModel", CTRL_PROGRESS,
+                            awt::Rectangle( PROGRESS_X_POS, PROGRESS_Y_POS, PROGRESS_WIDTH, PROGRESS_HEIGHT ),
+                            aProps);
+    }
+
+    uno::Reference< awt::XUnoControlDialog > xControl = awt::UnoControlDialog::create( mxContext );
+    xControl->setModel( xControlModel );
+
+    if ( !mbVisible )
+    {
+        xControl->setVisible( false );
+    }
+
+    xControl->createPeer( nullptr, nullptr );
+    {
+        for ( int i = 0; i < HELP_BUTTON; i++ )
+        {
+            uno::Reference< awt::XButton > xButton ( xControl->getControl( msButtonIDs[i] ), uno::UNO_QUERY);
+            if (xButton.is())
+            {
+                xButton->setActionCommand( msButtonIDs[i] );
+                xButton->addActionListener( this );
+            }
+        }
+    }
+
+    mxUpdDlg.set( xControl, uno::UNO_QUERY_THROW );
+    mnLastCtrlState = -1;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updatehdl.hxx b/extensions/source/update/check/updatehdl.hxx
new file mode 100644
index 000000000..297cf730c
--- /dev/null
+++ b/extensions/source/update/check/updatehdl.hxx
@@ -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 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <osl/mutex.hxx>
+#include <com/sun/star/uno/Any.h>
+#include <com/sun/star/uno/Reference.h>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/awt/Rectangle.hpp>
+#include <com/sun/star/awt/XActionListener.hpp>
+#include <com/sun/star/awt/XControlModel.hpp>
+#include <com/sun/star/awt/XDialog.hpp>
+#include <com/sun/star/awt/XTopWindowListener.hpp>
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/frame/XTerminateListener.hpp>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <unotools/resmgr.hxx>
+#include <rtl/ref.hxx>
+
+#include "actionlistener.hxx"
+
+enum DialogControls
+{
+    CANCEL_BUTTON = 0,
+    PAUSE_BUTTON,
+    RESUME_BUTTON,
+    INSTALL_BUTTON,
+    DOWNLOAD_BUTTON,
+    CLOSE_BUTTON,
+    HELP_BUTTON,
+    BUTTON_COUNT,
+    THROBBER_CTRL,
+    PROGRESS_CTRL
+};
+
+enum UpdateState {
+    UPDATESTATE_CHECKING = 0,
+    UPDATESTATE_ERROR_CHECKING,
+    UPDATESTATE_NO_UPDATE_AVAIL,
+    UPDATESTATE_UPDATE_AVAIL,
+    UPDATESTATE_UPDATE_NO_DOWNLOAD,
+    UPDATESTATE_AUTO_START,
+    UPDATESTATE_DOWNLOADING,
+    UPDATESTATE_DOWNLOAD_PAUSED,
+    UPDATESTATE_ERROR_DOWNLOADING,
+    UPDATESTATE_DOWNLOAD_AVAIL,
+    UPDATESTATE_EXT_UPD_AVAIL,
+    UPDATESTATES_COUNT
+};
+
+class UpdateHandler : public cppu::WeakImplHelper< css::awt::XActionListener,
+                                                    css::awt::XTopWindowListener,
+                                                    css::task::XInteractionHandler,
+                                                    css::frame::XTerminateListener >
+{
+private:
+    css::uno::Reference< css::uno::XComponentContext >    mxContext;
+    css::uno::Reference< css::awt::XDialog >              mxUpdDlg;
+    css::uno::Reference< css::task::XInteractionHandler > mxInteractionHdl;
+    rtl::Reference< IActionListener >                     mxActionListener;
+
+    UpdateState             meCurState;
+    UpdateState             meLastState;
+    sal_Int32               mnPercent;
+    short                   mnLastCtrlState;
+    bool                    mbDownloadBtnHasDots;
+    bool                    mbVisible;
+    bool                    mbStringsLoaded;
+    bool                    mbMinimized;
+    bool                    mbListenerAdded;
+    mutable bool            mbShowsMessageBox;
+
+    osl::Mutex              maMutex;
+
+    OUString           msNextVersion;
+    OUString           msDownloadPath;
+    OUString           msDownloadFile;
+    OUString           msDescriptionMsg;
+    OUString           msChecking;         // RID_UPDATE_STR_CHECKING
+    OUString           msCheckingError;    // RID_UPDATE_STR_CHECKING_ERR
+    OUString           msNoUpdFound;       // RID_UPDATE_STR_NO_UPD_FOUND
+    OUString           msUpdFound;         // RID_UPDATE_STR_UPD_FOUND
+    OUString           msDlgTitle;         // RID_UPDATE_STR_DLG_TITLE
+    OUString           msDownloadPause;    // RID_UPDATE_STR_DOWNLOAD_PAUSE
+    OUString           msDownloadError;    // RID_UPDATE_STR_DOWNLOAD_ERR
+    OUString           msDownloadWarning;  // RID_UPDATE_STR_DOWNLOAD_WARN
+    OUString           msDownloadDescr;    // RID_UPDATE_STR_DOWNLOAD_WARN
+    OUString           msDownloadNotAvail; // RID_UPDATE_STR_DOWNLOAD_UNAVAIL
+    OUString           msDownloading;      // RID_UPDATE_STR_DOWNLOADING
+    OUString           msReady2Install;    // RID_UPDATE_STR_READY_INSTALL
+    OUString           msCancelMessage;    // RID_UPDATE_STR_CANCEL_DOWNLOAD
+    OUString           msInstallMessage;   // RID_UPDATE_STR_BEGIN_INSTALL
+    OUString           msInstallError;     // RID_UPDATE_STR_INSTALL_ERROR
+    OUString           msOverwriteWarning; // RID_UPDATE_STR_OVERWRITE_WARNING
+    OUString           msPercent;          // RID_UPDATE_STR_PERCENT
+    OUString           msReloadWarning;    // RID_UPDATE_STR_OVERWRITE_WARNING
+    OUString           msReloadReload;     // RID_UPDATE_STR_OVERWRITE_WARNING
+    OUString           msReloadContinue;   // RID_UPDATE_STR_OVERWRITE_WARNING
+    OUString           msStatusFL;         // RID_UPDATE_FT_STATUS
+    OUString           msDescription;      // RID_UPDATE_FT_DESCRIPTION
+    OUString           msClose;            // RID_UPDATE_BTN_CLOSE
+    OUString           msDownload;         // RID_UPDATE_BTN_DOWNLOAD
+    OUString           msInstall;          // RID_UPDATE_BTN_INSTALL
+    OUString           msPauseBtn;         // RID_UPDATE_BTN_PAUSE
+    OUString           msResumeBtn;        // RID_UPDATE_BTN_RESUME
+    OUString           msCancelBtn;        // RID_UPDATE_BTN_CANCEL
+    OUString           msButtonIDs[ BUTTON_COUNT ];
+    OUString           msBubbleTexts[ UPDATESTATES_COUNT ];
+    OUString           msBubbleTitles[ UPDATESTATES_COUNT ];
+
+    void                    createDialog();
+    void                    updateState( UpdateState eNewState );
+    void                    startThrobber( bool bStart = true );
+    void                    setControlProperty( const OUString &rCtrlName,
+                                                const OUString &rPropName,
+                                                const css::uno::Any &rPropValue );
+    void                    showControl( const OUString &rCtrlName, bool bShow = true );
+    void                    showControls( short nControls );
+    void                    focusControl( DialogControls eID );
+    void                    enableControls( short nCtrlState );
+    void                    setDownloadBtnLabel( bool bAppendDots );
+    void                    loadStrings();
+    static OUString         loadString(const std::locale& rLocale,
+                                       TranslateId pResourceId);
+    OUString                substVariables( const OUString &rSource ) const;
+    static void             insertControlModel( css::uno::Reference< css::awt::XControlModel > const & rxDialogModel,
+                                                OUString const & rServiceName,
+                                                OUString const & rControlName,
+                                                css::awt::Rectangle const & rPosSize,
+                                                css::uno::Sequence< css::beans::NamedValue > const & rProps );
+
+    void                    setFullVersion( OUString& rString );
+
+public:
+                            UpdateHandler( const css::uno::Reference< css::uno::XComponentContext > & rxContext,
+                                           const rtl::Reference< IActionListener > & rxActionListener );
+    virtual                ~UpdateHandler() override;
+                            UpdateHandler(const UpdateHandler&) = delete;
+    UpdateHandler&          operator=(const UpdateHandler&) = delete;
+
+    bool                    isVisible() const;
+    bool                    isMinimized() const { return mbMinimized; }
+    void                    setVisible( bool bVisible = true );
+    void                    setProgress( sal_Int32 nPercent );
+    void                    setNextVersion( const OUString &rNextVersion ) { msNextVersion = rNextVersion; }
+    void                    setDownloadPath( const OUString &rPath ) { msDownloadPath = rPath; }
+    void                    setDownloadFile( std::u16string_view rPath );
+    void                    setErrorMessage( const OUString &rErrorMsg );
+    void                    setDescription( const OUString &rDescription ){ msDescriptionMsg = rDescription; }
+
+    void                    setState( UpdateState eState );
+    OUString           getBubbleText( UpdateState eState );
+    OUString           getBubbleTitle( UpdateState eState );
+    OUString           getDefaultInstErrMsg();
+    bool                    showWarning( const OUString &rWarning ) const;
+    bool                    showWarning( const OUString &rWarning, const OUString& rBtnText_1, const OUString& rBtnText_2 ) const;
+    bool                    showOverwriteWarning( std::u16string_view rFileName ) const;
+    bool                    showOverwriteWarning() const;
+
+    // Allows runtime exceptions to be thrown by const methods
+    operator css::uno::Reference< css::uno::XInterface > () const
+        { return const_cast< cppu::OWeakObject * > (static_cast< cppu::OWeakObject const * > (this)); };
+
+    // XActionListener
+    virtual void SAL_CALL   disposing( const css::lang::EventObject &rObj ) override;
+    virtual void SAL_CALL   actionPerformed( css::awt::ActionEvent const & rEvent) override;
+
+    // XTopWindowListener
+    virtual void SAL_CALL   windowOpened( const css::lang::EventObject& e ) override;
+    virtual void SAL_CALL   windowClosing( const css::lang::EventObject& e ) override;
+    virtual void SAL_CALL   windowClosed( const css::lang::EventObject& e ) override;
+    virtual void SAL_CALL   windowMinimized( const css::lang::EventObject& e ) override;
+    virtual void SAL_CALL   windowNormalized( const css::lang::EventObject& e ) override;
+    virtual void SAL_CALL   windowActivated( const css::lang::EventObject& e ) override;
+    virtual void SAL_CALL   windowDeactivated( const css::lang::EventObject& e ) override;
+
+    // XInteractionHandler
+    virtual void SAL_CALL   handle( const css::uno::Reference< css::task::XInteractionRequest >& Request ) override;
+
+    // XTerminateListener
+    virtual void SAL_CALL queryTermination( const css::lang::EventObject& e ) override;
+    virtual void SAL_CALL notifyTermination( const css::lang::EventObject& e ) override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updateinfo.hxx b/extensions/source/update/check/updateinfo.hxx
new file mode 100644
index 000000000..79387b358
--- /dev/null
+++ b/extensions/source/update/check/updateinfo.hxx
@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <vector>
+
+struct DownloadSource
+{
+    bool IsDirect;
+    OUString URL;
+
+    DownloadSource(bool bIsDirect, const OUString& aURL) : IsDirect(bIsDirect), URL(aURL) {};
+    DownloadSource(const DownloadSource& ds) : IsDirect(ds.IsDirect), URL(ds.URL) {};
+
+    DownloadSource & operator=( const DownloadSource & ds ) { IsDirect = ds.IsDirect; URL = ds.URL; return *this; };
+};
+
+struct ReleaseNote
+{
+    sal_uInt8 Pos;
+    OUString URL;
+    sal_uInt8 Pos2;
+    OUString URL2;
+
+    ReleaseNote(sal_uInt8 pos, const OUString& aURL) : Pos(pos), URL(aURL), Pos2(0), URL2() {};
+
+    ReleaseNote(const ReleaseNote& rn) :Pos(rn.Pos), URL(rn.URL), Pos2(rn.Pos2), URL2(rn.URL2) {};
+    ReleaseNote & operator=( const ReleaseNote& rn) { Pos=rn.Pos; URL=rn.URL; Pos2=rn.Pos2; URL2=rn.URL2; return *this; };
+};
+
+struct UpdateInfo
+{
+    OUString BuildId;
+    OUString Version;
+    OUString Description;
+    std::vector< DownloadSource > Sources;
+    std::vector< ReleaseNote > ReleaseNotes;
+};
+
+// Returns the URL of the release note for the given position
+OUString getReleaseNote(const UpdateInfo& rInfo, sal_uInt8 pos, bool autoDownloadEnabled=false);
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updateprotocol.cxx b/extensions/source/update/check/updateprotocol.cxx
new file mode 100644
index 000000000..db8319c79
--- /dev/null
+++ b/extensions/source/update/check/updateprotocol.cxx
@@ -0,0 +1,317 @@
+/* -*- 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 <com/sun/star/xml/xpath/XPathAPI.hpp>
+#include <com/sun/star/xml/xpath/XPathException.hpp>
+
+#include "updateprotocol.hxx"
+#include "updatecheckconfig.hxx"
+
+#include <com/sun/star/deployment/UpdateInformationEntry.hpp>
+#include <com/sun/star/deployment/XPackageInformationProvider.hpp>
+
+
+#include <rtl/ref.hxx>
+#include <rtl/bootstrap.hxx>
+#include <osl/diagnose.h>
+
+namespace container = css::container ;
+namespace deployment = css::deployment ;
+namespace uno = css::uno ;
+namespace task = css::task ;
+namespace xml = css::xml ;
+
+
+static bool
+getBootstrapData(
+    uno::Sequence< OUString > & rRepositoryList,
+    OUString & rGitID,
+    OUString & rInstallSetID)
+{
+    rGitID = "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version") ":buildid}";
+    rtl::Bootstrap::expandMacros( rGitID );
+    if ( rGitID.isEmpty() )
+        return false;
+
+    rInstallSetID = "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version") ":UpdateID}";
+    rtl::Bootstrap::expandMacros( rInstallSetID );
+    if ( rInstallSetID.isEmpty() )
+        return false;
+
+    OUString aValue( "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version") ":UpdateURL}" );
+    rtl::Bootstrap::expandMacros( aValue );
+
+    if( !aValue.isEmpty() )
+    {
+        rRepositoryList = { aValue };
+    }
+
+    return true;
+}
+
+
+// Returns 'true' if successfully connected to the update server
+bool
+checkForUpdates(
+    UpdateInfo& o_rUpdateInfo,
+    uno::Reference< uno::XComponentContext > const & rxContext,
+    uno::Reference< task::XInteractionHandler > const & rxInteractionHandler,
+    const uno::Reference< deployment::XUpdateInformationProvider >& rUpdateInfoProvider)
+{
+    OUString myArch;
+    OUString myOS;
+
+    rtl::Bootstrap::get("_OS", myOS);
+    rtl::Bootstrap::get("_ARCH", myArch);
+
+    uno::Sequence< OUString > aRepositoryList;
+    OUString aGitID;
+    OUString aInstallSetID;
+
+    if( ! ( getBootstrapData(aRepositoryList, aGitID, aInstallSetID) && (aRepositoryList.getLength() > 0) ) )
+        return false;
+
+    return checkForUpdates( o_rUpdateInfo, rxContext, rxInteractionHandler, rUpdateInfoProvider,
+            myOS, myArch,
+            aRepositoryList, aGitID, aInstallSetID );
+}
+
+bool
+checkForUpdates(
+    UpdateInfo& o_rUpdateInfo,
+    const uno::Reference< uno::XComponentContext > & rxContext,
+    const uno::Reference< task::XInteractionHandler > & rxInteractionHandler,
+    const uno::Reference< deployment::XUpdateInformationProvider >& rUpdateInfoProvider,
+    std::u16string_view rOS,
+    std::u16string_view rArch,
+    const uno::Sequence< OUString > &rRepositoryList,
+    std::u16string_view rGitID,
+    const OUString &rInstallSetID )
+{
+    if( !rxContext.is() )
+        throw uno::RuntimeException( "checkForUpdates: empty component context" );
+
+    OSL_ASSERT( rxContext->getServiceManager().is() );
+
+    // XPath implementation
+    uno::Reference< xml::xpath::XXPathAPI > xXPath = xml::xpath::XPathAPI::create(rxContext);
+
+    xXPath->registerNS( "inst", "http://update.libreoffice.org/description" );
+
+    if( rxInteractionHandler.is() )
+        rUpdateInfoProvider->setInteractionHandler(rxInteractionHandler);
+
+    try
+    {
+        uno::Reference< container::XEnumeration > aUpdateInfoEnumeration =
+            rUpdateInfoProvider->getUpdateInformationEnumeration( rRepositoryList, rInstallSetID );
+
+        if ( !aUpdateInfoEnumeration.is() )
+            return false; // something went wrong ..
+
+        OUString aXPathExpression =
+            OUString::Concat("/child::inst:description[inst:os=\'")+
+             rOS +
+            "\' and inst:arch=\'"+
+             rArch +
+            "\' and inst:gitid!=\'"+
+             rGitID +
+            "\']";
+
+
+        while( aUpdateInfoEnumeration->hasMoreElements() )
+        {
+            deployment::UpdateInformationEntry aEntry;
+
+            if( aUpdateInfoEnumeration->nextElement() >>= aEntry )
+            {
+                uno::Reference< xml::dom::XNode > xNode( aEntry.UpdateDocument );
+                uno::Reference< xml::dom::XNodeList > xNodeList;
+                try {
+                    xNodeList = xXPath->selectNodeList(xNode, aXPathExpression
+                        + "/inst:update/attribute::src");
+                } catch (const css::xml::xpath::XPathException &) {
+                    // ignore
+                }
+
+                sal_Int32 i, imax = xNodeList->getLength();
+                for( i = 0; i < imax; ++i )
+                {
+                    uno::Reference< xml::dom::XNode > xNode2( xNodeList->item(i) );
+
+                    if( xNode2.is() )
+                    {
+                        uno::Reference< xml::dom::XElement > xParent(xNode2->getParentNode(), uno::UNO_QUERY_THROW);
+                        OUString aType = xParent->getAttribute("type");
+                        bool bIsDirect = !aType.equalsIgnoreAsciiCase("text/html");
+
+                        o_rUpdateInfo.Sources.push_back( DownloadSource(bIsDirect, xNode2->getNodeValue()) );
+                    }
+                }
+
+                uno::Reference< xml::dom::XNode > xNode2;
+                try {
+                    xNode2 = xXPath->selectSingleNode(xNode, aXPathExpression
+                        + "/inst:version/text()");
+                } catch (const css::xml::xpath::XPathException &) {
+                    // ignore
+                }
+
+                if( xNode2.is() )
+                    o_rUpdateInfo.Version = xNode2->getNodeValue();
+
+                try {
+                    xNode2 = xXPath->selectSingleNode(xNode, aXPathExpression
+                        + "/inst:buildid/text()");
+                } catch (const css::xml::xpath::XPathException &) {
+                    // ignore
+                }
+
+                if( xNode2.is() )
+                    o_rUpdateInfo.BuildId = xNode2->getNodeValue();
+
+                o_rUpdateInfo.Description = aEntry.Description;
+
+                // Release Notes
+                try {
+                    xNodeList = xXPath->selectNodeList(xNode, aXPathExpression
+                        + "/inst:relnote");
+                } catch (const css::xml::xpath::XPathException &) {
+                    // ignore
+                }
+                imax = xNodeList->getLength();
+                for( i = 0; i < imax; ++i )
+                {
+                    uno::Reference< xml::dom::XElement > xRelNote(xNodeList->item(i), uno::UNO_QUERY);
+                    if( xRelNote.is() )
+                    {
+                        sal_Int32 pos = xRelNote->getAttribute("pos").toInt32();
+
+                        ReleaseNote aRelNote(static_cast<sal_uInt8>(pos), xRelNote->getAttribute("src"));
+
+                        if( xRelNote->hasAttribute("src2") )
+                        {
+                            pos = xRelNote->getAttribute("pos2").toInt32();
+                            aRelNote.Pos2 = static_cast<sal_Int8>(pos);
+                            aRelNote.URL2 = xRelNote->getAttribute("src2");
+                        }
+
+                        o_rUpdateInfo.ReleaseNotes.push_back(aRelNote);
+                    }
+                }
+
+                if( !o_rUpdateInfo.Sources.empty() )
+                    return true;
+            }
+        }
+    }
+    catch( ... )
+    {
+        return false;
+    }
+
+    return true;
+}
+
+
+bool storeExtensionUpdateInfos( const uno::Reference< uno::XComponentContext > & rxContext,
+                                const uno::Sequence< uno::Sequence< OUString > > &rUpdateInfos )
+{
+    bool bNotify = false;
+
+    if ( rUpdateInfos.hasElements() )
+    {
+        rtl::Reference< UpdateCheckConfig > aConfig = UpdateCheckConfig::get( rxContext );
+
+        for ( sal_Int32 i = rUpdateInfos.getLength() - 1; i >= 0; i-- )
+        {
+            bNotify |= aConfig->storeExtensionVersion( rUpdateInfos[i][0], rUpdateInfos[i][1] );
+        }
+    }
+    return bNotify;
+}
+
+
+// Returns 'true' if there are updates for any extension
+
+bool checkForExtensionUpdates( const uno::Reference< uno::XComponentContext > & rxContext )
+{
+    uno::Sequence< uno::Sequence< OUString > > aUpdateList;
+
+    uno::Reference< deployment::XPackageInformationProvider > xInfoProvider;
+    try
+    {
+        uno::Any aValue( rxContext->getValueByName(
+                "/singletons/com.sun.star.deployment.PackageInformationProvider" ) );
+        OSL_VERIFY( aValue >>= xInfoProvider );
+    }
+    catch( const uno::Exception& )
+    {
+        OSL_FAIL( "checkForExtensionUpdates: could not create the PackageInformationProvider!" );
+    }
+
+    if ( !xInfoProvider.is() ) return false;
+
+    aUpdateList = xInfoProvider->isUpdateAvailable( OUString() );
+    bool bNotify = storeExtensionUpdateInfos( rxContext, aUpdateList );
+
+    return bNotify;
+}
+
+
+// Returns 'true' if there are any pending updates for any extension (offline check)
+
+bool checkForPendingUpdates( const uno::Reference< uno::XComponentContext > & rxContext )
+{
+    uno::Sequence< uno::Sequence< OUString > > aExtensionList;
+    uno::Reference< deployment::XPackageInformationProvider > xInfoProvider;
+    try
+    {
+        uno::Any aValue( rxContext->getValueByName(
+                "/singletons/com.sun.star.deployment.PackageInformationProvider" ) );
+        OSL_VERIFY( aValue >>= xInfoProvider );
+    }
+    catch( const uno::Exception& )
+    {
+        OSL_FAIL( "checkForExtensionUpdates: could not create the PackageInformationProvider!" );
+    }
+
+    if ( !xInfoProvider.is() ) return false;
+
+    bool bPendingUpdateFound = false;
+
+    aExtensionList = xInfoProvider->getExtensionList();
+    if ( aExtensionList.hasElements() )
+    {
+        rtl::Reference< UpdateCheckConfig > aConfig = UpdateCheckConfig::get( rxContext );
+
+        for ( sal_Int32 i = aExtensionList.getLength() - 1; i >= 0; i-- )
+        {
+            bPendingUpdateFound = aConfig->checkExtensionVersion( aExtensionList[i][0], aExtensionList[i][1] );
+            if ( bPendingUpdateFound )
+                break;
+        }
+    }
+
+    return bPendingUpdateFound;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updateprotocol.hxx b/extensions/source/update/check/updateprotocol.hxx
new file mode 100644
index 000000000..4dedeb0d6
--- /dev/null
+++ b/extensions/source/update/check/updateprotocol.hxx
@@ -0,0 +1,68 @@
+/* -*- 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 <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/task/XInteractionHandler.hpp>
+#include <com/sun/star/deployment/XUpdateInformationProvider.hpp>
+
+#include "updateinfo.hxx"
+
+// Returns 'true' if successfully connected to the update server
+bool checkForUpdates(
+    UpdateInfo& o_rUpdateInfo,
+    const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+    const css::uno::Reference< css::task::XInteractionHandler >& rxInteractionHandler,
+    const css::uno::Reference< css::deployment::XUpdateInformationProvider >& rxProvider
+);
+
+// The same as above, that does not read the info from bootstrap
+SAL_DLLPUBLIC_EXPORT bool
+checkForUpdates(
+    UpdateInfo& o_rUpdateInfo,
+    const css::uno::Reference< css::uno::XComponentContext > & rxContext,
+    const css::uno::Reference< css::task::XInteractionHandler > & rxInteractionHandler,
+    const css::uno::Reference< css::deployment::XUpdateInformationProvider >& rUpdateInfoProvider,
+    std::u16string_view rOS,
+    std::u16string_view rArch,
+    const css::uno::Sequence< OUString > &rRepositoryList,
+    std::u16string_view rGitID,
+    const OUString &rInstallID
+);
+
+// Returns 'true' if there are updates for any extension
+bool checkForExtensionUpdates(
+    const css::uno::Reference< css::uno::XComponentContext >& rxContext
+);
+
+bool checkForPendingUpdates(
+    const css::uno::Reference< css::uno::XComponentContext >& rxContext
+);
+
+bool storeExtensionUpdateInfos(
+    const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+    const css::uno::Sequence< css::uno::Sequence< OUString > > &rUpdateInfos
+);
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updateprotocoltest.cxx b/extensions/source/update/check/updateprotocoltest.cxx
new file mode 100644
index 000000000..070f930af
--- /dev/null
+++ b/extensions/source/update/check/updateprotocoltest.cxx
@@ -0,0 +1,76 @@
+/* -*- 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/bootstrap.hxx>
+
+#include "updateprotocol.hxx"
+#include <com/sun/star/ucb/UniversalContentBroker.hpp>
+
+#include <sal/main.h>
+#include <osl/process.h>
+#include <stdio.h>
+#include "sal/log.hxx"
+
+namespace task = ::com::sun::star::task;
+namespace uno  = ::com::sun::star::uno;
+
+
+SAL_IMPLEMENT_MAIN()
+{
+    (void) argv;
+    (void) argc;
+
+    if( osl_getCommandArgCount() != 0 )
+    {
+        fprintf(stderr, "Usage: updateprotocoltest\n");
+        return -1;
+    }
+
+    // create the initial component context
+    uno::Reference< uno::XComponentContext > rComponentContext = cppu::defaultBootstrap_InitialComponentContext();
+
+    // initialize UCB (for backwards compatibility, in case some code still uses
+    // plain createInstance w/o args directly to obtain an instance):
+    css::ucb::UniversalContentBroker::create(rComponentContext);
+
+
+    OUString aURL;
+    OUString aVersion;
+
+    try
+    {
+        if( checkForUpdates(rComponentContext, uno::Reference< task::XInteractionHandler > (), aURL, aVersion) )
+        {
+            SAL_INFO("extensions.update", "Update found: " << aVersion << " on " << aURL);
+        }
+        else
+        {
+            SAL_INFO("extensions.update", "no updates found" );
+        }
+    }
+    catch( ... )
+    {
+        SAL_INFO("extensions.update", "unhandled exception caught" );
+    }
+
+    return 0;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/update/check/updchk.uno.component b/extensions/source/update/check/updchk.uno.component
new file mode 100644
index 000000000..f147e3065
--- /dev/null
+++ b/extensions/source/update/check/updchk.uno.component
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="vnd.sun.UpdateCheck"
+    constructor="extensions_update_UpdateCheckJob_get_implementation">
+    <service name="com.sun.star.setup.UpdateCheck"/>
+  </implementation>
+  <implementation name="vnd.sun.UpdateCheckConfig"
+    constructor="extensions_update_UpdateCheckConfig_get_implementation">
+    <service name="com.sun.star.setup.UpdateCheckConfig"/>
+  </implementation>
+</component>