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

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

15 files changed, 2444 insertions, 0 deletions

diff --git a/shell/source/backends/desktopbe/desktopbackend.cxx b/shell/source/backends/desktopbe/desktopbackend.cxx
new file mode 100644
index 000000000..4dcc91967
--- /dev/null
+++ b/shell/source/backends/desktopbe/desktopbackend.cxx
@@ -0,0 +1,301 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+#include <sal/log.hxx>
+
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/beans/UnknownPropertyException.hpp>
+#include <com/sun/star/beans/XPropertyChangeListener.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <com/sun/star/beans/XVetoableChangeListener.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/XMultiComponentFactory.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Exception.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/uno/XCurrentContext.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/weak.hxx>
+#include <osl/file.hxx>
+#include <osl/security.hxx>
+#include <rtl/byteseq.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <tools/diagnose_ex.h>
+#include <uno/current_context.hxx>
+
+namespace {
+
+class Default:
+    public cppu::WeakImplHelper<
+        css::lang::XServiceInfo, css::beans::XPropertySet >
+{
+public:
+    Default() {}
+    Default(const Default&) = delete;
+    Default& operator=(const Default&) = delete;
+
+private:
+    virtual ~Default() override {}
+
+    virtual OUString SAL_CALL getImplementationName() override
+    { return "com.sun.star.comp.configuration.backend.DesktopBackend"; }
+
+    virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName) override
+    { return ServiceName == getSupportedServiceNames()[0]; }
+
+    virtual css::uno::Sequence< OUString > SAL_CALL
+    getSupportedServiceNames() override
+    { return { "com.sun.star.configuration.backend.DesktopBackend" }; }
+
+    virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL
+    getPropertySetInfo() override
+    { return css::uno::Reference< css::beans::XPropertySetInfo >(); }
+
+    virtual void SAL_CALL setPropertyValue(
+        OUString const &, css::uno::Any const &) override;
+
+    virtual css::uno::Any SAL_CALL getPropertyValue(
+        OUString const & PropertyName) override;
+
+    virtual void SAL_CALL addPropertyChangeListener(
+        OUString const &,
+        css::uno::Reference< css::beans::XPropertyChangeListener > const &) override
+    {}
+
+    virtual void SAL_CALL removePropertyChangeListener(
+        OUString const &,
+        css::uno::Reference< css::beans::XPropertyChangeListener > const &) override
+    {}
+
+    virtual void SAL_CALL addVetoableChangeListener(
+        OUString const &,
+        css::uno::Reference< css::beans::XVetoableChangeListener > const &) override
+    {}
+
+    virtual void SAL_CALL removeVetoableChangeListener(
+        OUString const &,
+        css::uno::Reference< css::beans::XVetoableChangeListener > const &) override
+    {}
+};
+
+void Default::setPropertyValue(OUString const &, css::uno::Any const &)
+{
+    throw css::lang::IllegalArgumentException(
+        "setPropertyValue not supported",
+        static_cast< cppu::OWeakObject * >(this), -1);
+}
+
+OUString xdg_user_dir_lookup (const char *type, bool bAllowHomeDir)
+{
+    size_t nLenType = strlen(type);
+    char *config_home;
+    char *p;
+    bool bError = false;
+
+    osl::Security aSecurity;
+    oslFileHandle handle;
+    OUString aHomeDirURL;
+    OUString aDocumentsDirURL;
+    OUString aConfigFileURL;
+    OUStringBuffer aUserDirBuf;
+
+    if (!aSecurity.getHomeDir( aHomeDirURL ) )
+    {
+        osl::FileBase::getFileURLFromSystemPath("/tmp", aDocumentsDirURL);
+        return aDocumentsDirURL;
+    }
+
+    config_home = getenv ("XDG_CONFIG_HOME");
+    if (config_home == nullptr || config_home[0] == 0)
+    {
+        aConfigFileURL = aHomeDirURL + "/.config/user-dirs.dirs";
+    }
+    else
+    {
+        aConfigFileURL = OUString::createFromAscii(config_home) + "/user-dirs.dirs";
+    }
+
+    if(osl_File_E_None == osl_openFile(aConfigFileURL.pData, &handle, osl_File_OpenFlag_Read))
+    {
+        rtl::ByteSequence seq;
+        while (osl_File_E_None == osl_readLine(handle , reinterpret_cast<sal_Sequence **>(&seq)))
+        {
+            int relative = 0;
+            int len = seq.getLength();
+            seq.realloc(len + 1);
+            seq[len] = 0;
+
+            p = reinterpret_cast<char *>(seq.getArray());
+            while (*p == ' ' || *p == '\t')
+                p++;
+            if (strncmp (p, "XDG_", 4) != 0)
+                continue;
+            p += 4;
+            if (strncmp (p, OString(type, nLenType).toAsciiUpperCase().getStr(), nLenType) != 0)
+                continue;
+            p += nLenType;
+            if (strncmp (p, "_DIR", 4) != 0)
+                continue;
+            p += 4;
+            while (*p == ' ' || *p == '\t')
+                p++;
+            if (*p != '=')
+                continue;
+            p++;
+            while (*p == ' ' || *p == '\t')
+                p++;
+            if (*p != '"')
+                continue;
+            p++;
+            if (strncmp (p, "$HOME/", 6) == 0)
+            {
+                p += 6;
+                relative = 1;
+            }
+            else if (*p != '/')
+                continue;
+            if (relative)
+            {
+                aUserDirBuf = aHomeDirURL + "/";
+            }
+            else
+            {
+                aUserDirBuf.truncate();
+            }
+            while (*p && *p != '"')
+            {
+                if ((*p == '\\') && (*(p+1) != 0))
+                    p++;
+                aUserDirBuf.append(static_cast<sal_Unicode>(*p++));
+            }
+        }//end of while
+        osl_closeFile(handle);
+    }
+    else
+        bError = true;
+    if (aUserDirBuf.getLength()>0 && !bError)
+    {
+        aDocumentsDirURL = aUserDirBuf.makeStringAndClear();
+        if ( bAllowHomeDir ||
+             (aDocumentsDirURL != aHomeDirURL && aDocumentsDirURL != OUStringConcatenation(aHomeDirURL + "/")) )
+        {
+            osl::Directory aDocumentsDir( aDocumentsDirURL );
+            if( osl::FileBase::E_None == aDocumentsDir.open() )
+                return aDocumentsDirURL;
+        }
+    }
+    /* Use fallbacks historical compatibility if nothing else exists */
+    return aHomeDirURL + "/" + OUString::createFromAscii(type);
+}
+
+css::uno::Any xdgDirectoryIfExists(char const * type, bool bAllowHomeDir) {
+    auto url = xdg_user_dir_lookup(type, bAllowHomeDir);
+    return css::uno::Any(
+        osl::Directory(url).open() == osl::FileBase::E_None
+        ? css::beans::Optional<css::uno::Any>(true, css::uno::Any(url))
+        : css::beans::Optional<css::uno::Any>(false, css::uno::Any()));
+}
+
+css::uno::Any Default::getPropertyValue(OUString const & PropertyName)
+{
+    if (PropertyName == "TemplatePathVariable")
+    {
+        // Never pick up the HOME directory as the default location of user's templates
+        return xdgDirectoryIfExists("Templates", false);
+    }
+
+    if (PropertyName == "WorkPathVariable")
+    {
+        return xdgDirectoryIfExists("Documents", true);
+    }
+
+    if ( PropertyName == "EnableATToolSupport" ||
+         PropertyName == "ExternalMailer" ||
+         PropertyName == "SourceViewFontHeight" ||
+         PropertyName == "SourceViewFontName" ||
+         PropertyName == "ooInetFTPProxyName" ||
+         PropertyName == "ooInetFTPProxyPort" ||
+         PropertyName == "ooInetHTTPProxyName" ||
+         PropertyName == "ooInetHTTPProxyPort" ||
+         PropertyName == "ooInetHTTPSProxyName" ||
+         PropertyName == "ooInetHTTPSProxyPort" ||
+         PropertyName == "ooInetNoProxy" ||
+         PropertyName == "ooInetProxyType" ||
+         PropertyName == "givenname" ||
+         PropertyName == "sn" )
+    {
+        return css::uno::Any(css::beans::Optional< css::uno::Any >());
+    }
+
+    throw css::beans::UnknownPropertyException(
+        PropertyName, static_cast< cppu::OWeakObject * >(this));
+}
+
+css::uno::Reference< css::uno::XInterface > createBackend(
+    css::uno::Reference< css::uno::XComponentContext > const & context,
+    OUString const & name)
+{
+    try {
+        return css::uno::Reference< css::lang::XMultiComponentFactory >(
+            context->getServiceManager(), css::uno::UNO_SET_THROW)->
+            createInstanceWithContext(name, context);
+    } catch (css::uno::RuntimeException &) {
+        // Assuming these exceptions are real errors:
+        throw;
+    } catch (const css::uno::Exception &) {
+        // Assuming these exceptions indicate that the service is not installed:
+        TOOLS_WARN_EXCEPTION("shell", "createInstance(" << name << ") failed");
+        return css::uno::Reference< css::uno::XInterface >();
+    }
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+shell_DesktopBackend_get_implementation(
+    css::uno::XComponentContext* context , css::uno::Sequence<css::uno::Any> const&)
+{
+    OUString desktop;
+    css::uno::Reference< css::uno::XCurrentContext > current(
+        css::uno::getCurrentContext());
+    if (current.is()) {
+        current->getValueByName("system.desktop-environment") >>= desktop;
+    }
+
+    // Fall back to the default if the specific backend is not available:
+    css::uno::Reference< css::uno::XInterface > backend;
+    if (desktop == "PLASMA5")
+        backend = createBackend(context,
+            "com.sun.star.configuration.backend.KF5Backend");
+    if (!backend)
+        backend = static_cast< cppu::OWeakObject * >(new Default);
+    backend->acquire();
+    return backend.get();
+}
+
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/backends/desktopbe/desktopbe1.component b/shell/source/backends/desktopbe/desktopbe1.component
new file mode 100644
index 000000000..abc47f042
--- /dev/null
+++ b/shell/source/backends/desktopbe/desktopbe1.component
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.configuration.backend.DesktopBackend"
+    constructor="shell_DesktopBackend_get_implementation">
+    <service name="com.sun.star.configuration.backend.DesktopBackend"/>
+  </implementation>
+</component>
diff --git a/shell/source/backends/kf5be/kf5access.cxx b/shell/source/backends/kf5be/kf5access.cxx
new file mode 100644
index 000000000..bfb669cf2
--- /dev/null
+++ b/shell/source/backends/kf5be/kf5access.cxx
@@ -0,0 +1,315 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this 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 "kf5access.hxx"
+
+#include <QtGui/QFont>
+#include <QtCore/QString>
+#include <QtGui/QFontDatabase>
+#include <QtCore/QStandardPaths>
+#include <QtCore/QDir>
+#include <QtCore/QUrl>
+
+#include <kprotocolmanager.h>
+
+#include <kemailsettings.h>
+// #include <kglobalsettings.h>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <osl/diagnose.h>
+#include <osl/file.h>
+#include <rtl/ustring.hxx>
+
+namespace kf5access
+{
+namespace
+{
+namespace uno = css::uno;
+}
+
+namespace
+{
+OUString fromQStringToOUString(QString const& s)
+{
+    // Conversion from QString size()'s int to OUString's sal_Int32 should be non-narrowing:
+    return { reinterpret_cast<char16_t const*>(s.utf16()), s.size() };
+}
+}
+
+css::beans::Optional<css::uno::Any> getValue(std::u16string_view id)
+{
+    if (id == u"ExternalMailer")
+    {
+        KEMailSettings aEmailSettings;
+        QString aClientProgram;
+        OUString sClientProgram;
+
+        aClientProgram = aEmailSettings.getSetting(KEMailSettings::ClientProgram);
+        if (aClientProgram.isEmpty())
+            aClientProgram = QStringLiteral("kmail");
+        else
+            aClientProgram = aClientProgram.section(QLatin1Char(' '), 0, 0);
+        sClientProgram = fromQStringToOUString(aClientProgram);
+        return css::beans::Optional<css::uno::Any>(true, uno::Any(sClientProgram));
+    }
+    else if (id == u"SourceViewFontHeight")
+    {
+        const QFont aFixedFont = QFontDatabase::systemFont(QFontDatabase::FixedFont);
+        const short nFontHeight = aFixedFont.pointSize();
+        return css::beans::Optional<css::uno::Any>(true, uno::Any(nFontHeight));
+    }
+    else if (id == u"SourceViewFontName")
+    {
+        const QFont aFixedFont = QFontDatabase::systemFont(QFontDatabase::FixedFont);
+        const QString aFontName = aFixedFont.family();
+        const OUString sFontName = fromQStringToOUString(aFontName);
+        return css::beans::Optional<css::uno::Any>(true, uno::Any(sFontName));
+    }
+    else if (id == u"EnableATToolSupport")
+    {
+        /* does not make much sense without an accessibility bridge */
+        bool ATToolSupport = false;
+        return css::beans::Optional<css::uno::Any>(true,
+                                                   uno::Any(OUString::boolean(ATToolSupport)));
+    }
+    else if (id == u"WorkPathVariable")
+    {
+        QString aDocumentsDir(QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation));
+        if (aDocumentsDir.isEmpty())
+            aDocumentsDir = QDir::homePath();
+        OUString sDocumentsDir;
+        OUString sDocumentsURL;
+        if (aDocumentsDir.endsWith(QLatin1Char('/')))
+            aDocumentsDir.truncate(aDocumentsDir.length() - 1);
+        sDocumentsDir = fromQStringToOUString(aDocumentsDir);
+        osl_getFileURLFromSystemPath(sDocumentsDir.pData, &sDocumentsURL.pData);
+        return css::beans::Optional<css::uno::Any>(true, uno::Any(sDocumentsURL));
+    }
+    else if (id == u"ooInetFTPProxyName")
+    {
+        QString aFTPProxy;
+        switch (KProtocolManager::proxyType())
+        {
+            case KProtocolManager::ManualProxy: // Proxies are manually configured
+                aFTPProxy = KProtocolManager::proxyFor(QStringLiteral("FTP"));
+                break;
+            case KProtocolManager::PACProxy: // A proxy configuration URL has been given
+            case KProtocolManager::WPADProxy: // A proxy should be automatically discovered
+            case KProtocolManager::EnvVarProxy: // Proxy values set through environment variables
+                // In such cases, the proxy address is not stored in KDE, but determined dynamically.
+                // The proxy address may depend on the requested address, on the time of the day, on the speed of the wind...
+                // The best we can do here is to ask the current value for a given address.
+                aFTPProxy = KProtocolManager::proxyForUrl(
+                    QUrl(QStringLiteral("ftp://ftp.libreoffice.org")));
+                break;
+            default: // No proxy is used
+                break;
+        }
+        if (!aFTPProxy.isEmpty())
+        {
+            QUrl aProxy(aFTPProxy);
+            OUString sProxy = fromQStringToOUString(aProxy.host());
+            return css::beans::Optional<css::uno::Any>(true, uno::Any(sProxy));
+        }
+    }
+    else if (id == u"ooInetFTPProxyPort")
+    {
+        QString aFTPProxy;
+        switch (KProtocolManager::proxyType())
+        {
+            case KProtocolManager::ManualProxy: // Proxies are manually configured
+                aFTPProxy = KProtocolManager::proxyFor(QStringLiteral("FTP"));
+                break;
+            case KProtocolManager::PACProxy: // A proxy configuration URL has been given
+            case KProtocolManager::WPADProxy: // A proxy should be automatically discovered
+            case KProtocolManager::EnvVarProxy: // Proxy values set through environment variables
+                // In such cases, the proxy address is not stored in KDE, but determined dynamically.
+                // The proxy address may depend on the requested address, on the time of the day, on the speed of the wind...
+                // The best we can do here is to ask the current value for a given address.
+                aFTPProxy = KProtocolManager::proxyForUrl(
+                    QUrl(QStringLiteral("ftp://ftp.libreoffice.org")));
+                break;
+            default: // No proxy is used
+                break;
+        }
+        if (!aFTPProxy.isEmpty())
+        {
+            QUrl aProxy(aFTPProxy);
+            sal_Int32 nPort = aProxy.port();
+            return css::beans::Optional<css::uno::Any>(true, uno::Any(nPort));
+        }
+    }
+    else if (id == u"ooInetHTTPProxyName")
+    {
+        QString aHTTPProxy;
+        switch (KProtocolManager::proxyType())
+        {
+            case KProtocolManager::ManualProxy: // Proxies are manually configured
+                aHTTPProxy = KProtocolManager::proxyFor(QStringLiteral("HTTP"));
+                break;
+            case KProtocolManager::PACProxy: // A proxy configuration URL has been given
+            case KProtocolManager::WPADProxy: // A proxy should be automatically discovered
+            case KProtocolManager::EnvVarProxy: // Proxy values set through environment variables
+                // In such cases, the proxy address is not stored in KDE, but determined dynamically.
+                // The proxy address may depend on the requested address, on the time of the day, on the speed of the wind...
+                // The best we can do here is to ask the current value for a given address.
+                aHTTPProxy = KProtocolManager::proxyForUrl(
+                    QUrl(QStringLiteral("http://www.libreoffice.org")));
+                break;
+            default: // No proxy is used
+                break;
+        }
+        if (!aHTTPProxy.isEmpty())
+        {
+            QUrl aProxy(aHTTPProxy);
+            OUString sProxy = fromQStringToOUString(aProxy.host());
+            return css::beans::Optional<css::uno::Any>(true, uno::Any(sProxy));
+        }
+    }
+    else if (id == u"ooInetHTTPProxyPort")
+    {
+        QString aHTTPProxy;
+        switch (KProtocolManager::proxyType())
+        {
+            case KProtocolManager::ManualProxy: // Proxies are manually configured
+                aHTTPProxy = KProtocolManager::proxyFor(QStringLiteral("HTTP"));
+                break;
+            case KProtocolManager::PACProxy: // A proxy configuration URL has been given
+            case KProtocolManager::WPADProxy: // A proxy should be automatically discovered
+            case KProtocolManager::EnvVarProxy: // Proxy values set through environment variables
+                // In such cases, the proxy address is not stored in KDE, but determined dynamically.
+                // The proxy address may depend on the requested address, on the time of the day, on the speed of the wind...
+                // The best we can do here is to ask the current value for a given address.
+                aHTTPProxy = KProtocolManager::proxyForUrl(
+                    QUrl(QStringLiteral("http://www.libreoffice.org")));
+                break;
+            default: // No proxy is used
+                break;
+        }
+        if (!aHTTPProxy.isEmpty())
+        {
+            QUrl aProxy(aHTTPProxy);
+            sal_Int32 nPort = aProxy.port();
+            return css::beans::Optional<css::uno::Any>(true, uno::Any(nPort));
+        }
+    }
+    else if (id == u"ooInetHTTPSProxyName")
+    {
+        QString aHTTPSProxy;
+        switch (KProtocolManager::proxyType())
+        {
+            case KProtocolManager::ManualProxy: // Proxies are manually configured
+                aHTTPSProxy = KProtocolManager::proxyFor(QStringLiteral("HTTPS"));
+                break;
+            case KProtocolManager::PACProxy: // A proxy configuration URL has been given
+            case KProtocolManager::WPADProxy: // A proxy should be automatically discovered
+            case KProtocolManager::EnvVarProxy: // Proxy values set through environment variables
+                // In such cases, the proxy address is not stored in KDE, but determined dynamically.
+                // The proxy address may depend on the requested address, on the time of the day, on the speed of the wind...
+                // The best we can do here is to ask the current value for a given address.
+                aHTTPSProxy = KProtocolManager::proxyForUrl(
+                    QUrl(QStringLiteral("https://www.libreoffice.org")));
+                break;
+            default: // No proxy is used
+                break;
+        }
+        if (!aHTTPSProxy.isEmpty())
+        {
+            QUrl aProxy(aHTTPSProxy);
+            OUString sProxy = fromQStringToOUString(aProxy.host());
+            return css::beans::Optional<css::uno::Any>(true, uno::Any(sProxy));
+        }
+    }
+    else if (id == u"ooInetHTTPSProxyPort")
+    {
+        QString aHTTPSProxy;
+        switch (KProtocolManager::proxyType())
+        {
+            case KProtocolManager::ManualProxy: // Proxies are manually configured
+                aHTTPSProxy = KProtocolManager::proxyFor(QStringLiteral("HTTPS"));
+                break;
+            case KProtocolManager::PACProxy: // A proxy configuration URL has been given
+            case KProtocolManager::WPADProxy: // A proxy should be automatically discovered
+            case KProtocolManager::EnvVarProxy: // Proxy values set through environment variables
+                // In such cases, the proxy address is not stored in KDE, but determined dynamically.
+                // The proxy address may depend on the requested address, on the time of the day, on the speed of the wind...
+                // The best we can do here is to ask the current value for a given address.
+                aHTTPSProxy = KProtocolManager::proxyForUrl(
+                    QUrl(QStringLiteral("https://www.libreoffice.org")));
+                break;
+            default: // No proxy is used
+                break;
+        }
+        if (!aHTTPSProxy.isEmpty())
+        {
+            QUrl aProxy(aHTTPSProxy);
+            sal_Int32 nPort = aProxy.port();
+            return css::beans::Optional<css::uno::Any>(true, uno::Any(nPort));
+        }
+    }
+    else if (id == u"ooInetNoProxy")
+    {
+        QString aNoProxyFor;
+        switch (KProtocolManager::proxyType())
+        {
+            case KProtocolManager::ManualProxy: // Proxies are manually configured
+            case KProtocolManager::PACProxy: // A proxy configuration URL has been given
+            case KProtocolManager::WPADProxy: // A proxy should be automatically discovered
+            case KProtocolManager::EnvVarProxy: // Proxy values set through environment variables
+                aNoProxyFor = KProtocolManager::noProxyFor();
+                break;
+            default: // No proxy is used
+                break;
+        }
+        if (!aNoProxyFor.isEmpty())
+        {
+            OUString sNoProxyFor;
+
+            aNoProxyFor = aNoProxyFor.replace(QLatin1Char(','), QLatin1Char(';'));
+            sNoProxyFor = fromQStringToOUString(aNoProxyFor);
+            return css::beans::Optional<css::uno::Any>(true, uno::Any(sNoProxyFor));
+        }
+    }
+    else if (id == u"ooInetProxyType")
+    {
+        sal_Int32 nProxyType;
+        switch (KProtocolManager::proxyType())
+        {
+            case KProtocolManager::ManualProxy: // Proxies are manually configured
+            case KProtocolManager::PACProxy: // A proxy configuration URL has been given
+            case KProtocolManager::WPADProxy: // A proxy should be automatically discovered
+            case KProtocolManager::EnvVarProxy: // Proxy values set through environment variables
+                nProxyType = 1;
+                break;
+            default: // No proxy is used
+                nProxyType = 0;
+        }
+        return css::beans::Optional<css::uno::Any>(true, uno::Any(nProxyType));
+    }
+    else
+    {
+        OSL_ASSERT(false); // this cannot happen
+    }
+    return css::beans::Optional<css::uno::Any>();
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/backends/kf5be/kf5access.hxx b/shell/source/backends/kf5be/kf5access.hxx
new file mode 100644
index 000000000..765d9c706
--- /dev/null
+++ b/shell/source/backends/kf5be/kf5access.hxx
@@ -0,0 +1,41 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SHELL_SOURCE_BACKENDS_KF5BE_KF5ACCESS_HXX
+#define INCLUDED_SHELL_SOURCE_BACKENDS_KF5BE_KF5ACCESS_HXX
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <com/sun/star/beans/Optional.hpp>
+
+namespace com::sun::star::uno
+{
+class Any;
+}
+
+namespace kf5access
+{
+css::beans::Optional<css::uno::Any> getValue(std::u16string_view id);
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/backends/kf5be/kf5backend.cxx b/shell/source/backends/kf5be/kf5backend.cxx
new file mode 100644
index 000000000..7137a9999
--- /dev/null
+++ b/shell/source/backends/kf5be/kf5backend.cxx
@@ -0,0 +1,260 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <memory>
+
+#include <QtWidgets/QApplication>
+
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/beans/UnknownPropertyException.hpp>
+#include <com/sun/star/beans/XPropertyChangeListener.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <com/sun/star/beans/XVetoableChangeListener.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/uno/XCurrentContext.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/weak.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <uno/current_context.hxx>
+#include <vcl/svapp.hxx>
+
+#include <osl/process.h>
+#include <osl/thread.h>
+
+#include "kf5access.hxx"
+
+namespace
+{
+class Service : public cppu::WeakImplHelper<css::lang::XServiceInfo, css::beans::XPropertySet>
+{
+public:
+    Service();
+
+private:
+    // noncopyable until we have good reasons...
+    Service(const Service&) = delete;
+    Service& operator=(const Service&) = delete;
+
+    virtual ~Service() override {}
+
+    virtual OUString SAL_CALL getImplementationName() override
+    {
+        return "com.sun.star.comp.configuration.backend.KF5Backend";
+    }
+
+    virtual sal_Bool SAL_CALL supportsService(OUString const& ServiceName) override
+    {
+        return ServiceName == getSupportedServiceNames()[0];
+    }
+
+    virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override
+    {
+        return { "com.sun.star.configuration.backend.KF5Backend" };
+    }
+
+    virtual css::uno::Reference<css::beans::XPropertySetInfo> SAL_CALL getPropertySetInfo() override
+    {
+        return css::uno::Reference<css::beans::XPropertySetInfo>();
+    }
+
+    virtual void SAL_CALL setPropertyValue(OUString const&, css::uno::Any const&) override;
+
+    virtual css::uno::Any SAL_CALL getPropertyValue(OUString const& PropertyName) override;
+
+    virtual void SAL_CALL addPropertyChangeListener(
+        OUString const&, css::uno::Reference<css::beans::XPropertyChangeListener> const&) override
+    {
+    }
+
+    virtual void SAL_CALL removePropertyChangeListener(
+        OUString const&, css::uno::Reference<css::beans::XPropertyChangeListener> const&) override
+    {
+    }
+
+    virtual void SAL_CALL addVetoableChangeListener(
+        OUString const&, css::uno::Reference<css::beans::XVetoableChangeListener> const&) override
+    {
+    }
+
+    virtual void SAL_CALL removeVetoableChangeListener(
+        OUString const&, css::uno::Reference<css::beans::XVetoableChangeListener> const&) override
+    {
+    }
+
+    std::map<OUString, css::beans::Optional<css::uno::Any>> m_KDESettings;
+};
+
+OString getDisplayArg()
+{
+    OUString aParam;
+    const sal_uInt32 nParams = osl_getCommandArgCount();
+    for (sal_uInt32 nIdx = 0; nIdx < nParams; ++nIdx)
+    {
+        osl_getCommandArg(nIdx, &aParam.pData);
+        if (aParam != "-display")
+            continue;
+
+        ++nIdx;
+        osl_getCommandArg(nIdx, &aParam.pData);
+        return OUStringToOString(aParam, osl_getThreadTextEncoding());
+    }
+    return {};
+}
+
+OString getExecutable()
+{
+    OUString aParam, aBin;
+    osl_getExecutableFile(&aParam.pData);
+    osl_getSystemPathFromFileURL(aParam.pData, &aBin.pData);
+    return OUStringToOString(aBin, osl_getThreadTextEncoding());
+}
+
+void readKDESettings(std::map<OUString, css::beans::Optional<css::uno::Any>>& rSettings)
+{
+    const std::vector<OUString> aKeys
+        = { "EnableATToolSupport",  "ExternalMailer",       "SourceViewFontHeight",
+            "SourceViewFontName",   "WorkPathVariable",     "ooInetFTPProxyName",
+            "ooInetFTPProxyPort",   "ooInetHTTPProxyName",  "ooInetHTTPProxyPort",
+            "ooInetHTTPSProxyName", "ooInetHTTPSProxyPort", "ooInetNoProxy",
+            "ooInetProxyType" };
+
+    for (const OUString& aKey : aKeys)
+    {
+        css::beans::Optional<css::uno::Any> aValue = kf5access::getValue(aKey);
+        std::pair<OUString, css::beans::Optional<css::uno::Any>> elem
+            = std::make_pair(aKey, aValue);
+        rSettings.insert(elem);
+    }
+}
+
+// init the QApplication when we load the kf5backend into a non-Qt vclplug (e.g. gtk3_kde5)
+// TODO: use a helper process to read these values without linking to Qt directly?
+// TODO: share this code somehow with Qt5Instance.cxx?
+void initQApp(std::map<OUString, css::beans::Optional<css::uno::Any>>& rSettings)
+{
+    const auto aDisplay = getDisplayArg();
+    int nFakeArgc = aDisplay.isEmpty() ? 2 : 3;
+    char** pFakeArgv = new char*[nFakeArgc];
+
+    pFakeArgv[0] = strdup(getExecutable().getStr());
+    pFakeArgv[1] = strdup("--nocrashhandler");
+    if (!aDisplay.isEmpty())
+        pFakeArgv[2] = strdup(aDisplay.getStr());
+
+    char* session_manager = nullptr;
+    if (auto* session_manager_env = getenv("SESSION_MANAGER"))
+    {
+        session_manager = strdup(session_manager_env);
+        unsetenv("SESSION_MANAGER");
+    }
+
+    {
+        // rhbz#2047319 drop the SolarMutex during the execution of QApplication::init()
+        // https://invent.kde.org/qt/qt/qtwayland/-/merge_requests/24#note_383915
+        SolarMutexReleaser aReleaser; // rhbz#2047319 drop the SolarMutex during the execution
+
+        std::unique_ptr<QApplication> app(new QApplication(nFakeArgc, pFakeArgv));
+        QObject::connect(app.get(), &QObject::destroyed, app.get(), [nFakeArgc, pFakeArgv]() {
+            for (int i = 0; i < nFakeArgc; ++i)
+                free(pFakeArgv[i]);
+            delete[] pFakeArgv;
+        });
+
+        readKDESettings(rSettings);
+    }
+
+    if (session_manager != nullptr)
+    {
+        // coverity[tainted_string] - trusted source for setenv
+        setenv("SESSION_MANAGER", session_manager, 1);
+        free(session_manager);
+    }
+}
+
+Service::Service()
+{
+    css::uno::Reference<css::uno::XCurrentContext> context(css::uno::getCurrentContext());
+    if (!context.is())
+        return;
+
+    OUString desktop;
+    context->getValueByName("system.desktop-environment") >>= desktop;
+
+    if (desktop == "PLASMA5")
+    {
+        if (!qApp) // no qt event loop yet
+        {
+            // so we start one and read KDE settings
+            initQApp(m_KDESettings);
+        }
+        else // someone else (most likely kde/qt vclplug) has started qt event loop
+            // all that is left to do is to read KDE settings
+            readKDESettings(m_KDESettings);
+    }
+}
+
+void Service::setPropertyValue(OUString const&, css::uno::Any const&)
+{
+    throw css::lang::IllegalArgumentException("setPropertyValue not supported",
+                                              static_cast<cppu::OWeakObject*>(this), -1);
+}
+
+css::uno::Any Service::getPropertyValue(OUString const& PropertyName)
+{
+    if (PropertyName == "EnableATToolSupport" || PropertyName == "ExternalMailer"
+        || PropertyName == "SourceViewFontHeight" || PropertyName == "SourceViewFontName"
+        || PropertyName == "WorkPathVariable" || PropertyName == "ooInetFTPProxyName"
+        || PropertyName == "ooInetFTPProxyPort" || PropertyName == "ooInetHTTPProxyName"
+        || PropertyName == "ooInetHTTPProxyPort" || PropertyName == "ooInetHTTPSProxyName"
+        || PropertyName == "ooInetHTTPSProxyPort" || PropertyName == "ooInetNoProxy"
+        || PropertyName == "ooInetProxyType")
+    {
+        std::map<OUString, css::beans::Optional<css::uno::Any>>::iterator it
+            = m_KDESettings.find(PropertyName);
+        if (it != m_KDESettings.end())
+            return css::uno::Any(it->second);
+        else
+            return css::uno::Any(css::beans::Optional<css::uno::Any>());
+    }
+    else if (PropertyName == "givenname" || PropertyName == "sn"
+             || PropertyName == "TemplatePathVariable")
+    {
+        return css::uno::Any(css::beans::Optional<css::uno::Any>());
+        //TODO: obtain values from KDE?
+    }
+    throw css::beans::UnknownPropertyException(PropertyName, static_cast<cppu::OWeakObject*>(this));
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+shell_kf5desktop_get_implementation(css::uno::XComponentContext*,
+                                    css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new Service());
+}
+}
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/backends/kf5be/kf5be1.component b/shell/source/backends/kf5be/kf5be1.component
new file mode 100644
index 000000000..dd893bcb6
--- /dev/null
+++ b/shell/source/backends/kf5be/kf5be1.component
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.configuration.backend.KF5Backend"
+    constructor="shell_kf5desktop_get_implementation">
+    <service name="com.sun.star.configuration.backend.KF5Backend"/>
+  </implementation>
+</component>
diff --git a/shell/source/backends/localebe/localebackend.cxx b/shell/source/backends/localebe/localebackend.cxx
new file mode 100644
index 000000000..558926d8f
--- /dev/null
+++ b/shell/source/backends/localebe/localebackend.cxx
@@ -0,0 +1,333 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+#include <sal/log.hxx>
+
+#include <cassert>
+#include <limits>
+
+#include "localebackend.hxx"
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <cppuhelper/supportsservice.hxx>
+#include <rtl/character.hxx>
+#include <o3tl/char16_t2wchar_t.hxx>
+#include <i18nlangtag/languagetag.hxx>
+#include <i18nlangtag/mslangid.hxx>
+
+#ifdef _WIN32
+#if !defined WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+
+static css::beans::Optional<css::uno::Any> ImplGetLocale(LCID lcid)
+{
+    WCHAR buffer[8];
+    PWSTR cp = buffer;
+
+    cp += GetLocaleInfoW( lcid, LOCALE_SISO639LANGNAME, buffer, 4 );
+    if( cp > buffer )
+    {
+        if( 0 < GetLocaleInfoW( lcid, LOCALE_SISO3166CTRYNAME, cp, buffer + 8 - cp) )
+            // #i50822# minus character must be written before cp
+            *(cp - 1) = '-';
+
+        return {true, css::uno::Any(OUString(o3tl::toU(buffer)))};
+    }
+
+    return {false, {}};
+}
+
+#elif defined(MACOSX)
+
+#include <rtl/ustrbuf.hxx>
+#include <locale.h>
+#include <string.h>
+
+#include <premac.h>
+#include <CoreServices/CoreServices.h>
+#include <CoreFoundation/CoreFoundation.h>
+#include <postmac.h>
+
+namespace /* private */
+{
+
+    void OUStringBufferAppendCFString(OUStringBuffer& buffer, const CFStringRef s)
+    {
+        CFIndex lstr = CFStringGetLength(s);
+        for (CFIndex i = 0; i < lstr; i++)
+            buffer.append(sal_Unicode(CFStringGetCharacterAtIndex(s, i)));
+    }
+
+    template <typename T>
+    class CFGuard
+    {
+    public:
+        explicit CFGuard(T& rT) : rT_(rT) {}
+        ~CFGuard() { if (rT_) CFRelease(rT_); }
+    private:
+        T& rT_;
+    };
+
+    typedef CFGuard<CFArrayRef> CFArrayGuard;
+    typedef CFGuard<CFStringRef> CFStringGuard;
+    typedef CFGuard<CFTypeRef> CFTypeRefGuard;
+
+    /* For more information on the Apple locale concept please refer to
+    http://developer.apple.com/documentation/CoreFoundation/Conceptual/CFLocales/Articles/CFLocaleConcepts.html
+    According to this documentation a locale identifier has the format: language[_country][_variant]*
+    e.g. es_ES_PREEURO -> spain prior Euro support
+    Note: The calling code should be able to handle locales with only language information e.g. 'en' for certain
+    UI languages just the language code will be returned.
+    */
+
+    CFStringRef ImplGetAppPreference(const char* pref)
+    {
+        CFStringRef csPref = CFStringCreateWithCString(nullptr, pref, kCFStringEncodingASCII);
+        CFStringGuard csRefGuard(csPref);
+
+        CFTypeRef ref = CFPreferencesCopyAppValue(csPref, kCFPreferencesCurrentApplication);
+        CFTypeRefGuard refGuard(ref);
+
+        if (ref == nullptr)
+            return nullptr;
+
+        CFStringRef sref = (CFGetTypeID(ref) == CFArrayGetTypeID()) ? static_cast<CFStringRef>(CFArrayGetValueAtIndex(static_cast<CFArrayRef>(ref), 0)) : static_cast<CFStringRef>(ref);
+
+        // NOTE: this API is only available with macOS >=10.3. We need to use it because
+        // Apple used non-ISO values on systems <10.2 like "German" for instance but didn't
+        // upgrade those values during upgrade to newer macOS versions. See also #i54337#
+        return CFLocaleCreateCanonicalLocaleIdentifierFromString(kCFAllocatorDefault, sref);
+    }
+
+    css::beans::Optional<css::uno::Any> ImplGetLocale(const char* pref)
+    {
+        CFStringRef sref = ImplGetAppPreference(pref);
+        CFStringGuard srefGuard(sref);
+
+        OUStringBuffer aLocaleBuffer;
+        aLocaleBuffer.append("en-US"); // initialize with fallback value
+
+        if (sref != nullptr)
+        {
+            // split the string into substrings; the first two (if there are two) substrings
+            // are language and country
+            CFArrayRef subs = CFStringCreateArrayBySeparatingStrings(nullptr, sref, CFSTR("_"));
+            CFArrayGuard subsGuard(subs);
+
+            if (subs != nullptr)
+            {
+                aLocaleBuffer.setLength(0); // clear buffer which still contains fallback value
+
+                CFStringRef lang = static_cast<CFStringRef>(CFArrayGetValueAtIndex(subs, 0));
+                OUStringBufferAppendCFString(aLocaleBuffer, lang);
+
+                // country also available? Assumption: if the array contains more than one
+                // value the second value is always the country!
+                if (CFArrayGetCount(subs) > 1)
+                {
+                    aLocaleBuffer.append("-");
+                    CFStringRef country = static_cast<CFStringRef>(CFArrayGetValueAtIndex(subs, 1));
+                    OUStringBufferAppendCFString(aLocaleBuffer, country);
+                }
+            }
+        }
+        return {true, css::uno::Any(aLocaleBuffer.makeStringAndClear())};
+    }
+
+} // namespace /* private */
+
+#else
+
+#include <rtl/ustrbuf.hxx>
+#include <cstdlib>
+#include <cstring>
+
+static css::beans::Optional<css::uno::Any> ImplGetLocale(char const * category)
+{
+    const char *locale = std::getenv("LC_ALL");
+    if (locale == nullptr || *locale == '\0') {
+        locale = std::getenv(category);
+        if (locale == nullptr || *locale == '\0') {
+            locale = std::getenv("LANG");
+        }
+    }
+
+    // Return "en-US" for C locales
+    if( (locale == nullptr) || *locale == '\0' || std::strcmp(locale, "C") == 0
+        || std::strcmp(locale, "POSIX") == 0 )
+        return {true, css::uno::Any(OUString("en-US"))};
+
+
+    const char *cp;
+    const char *uscore = nullptr;
+    const char *end = nullptr;
+
+    // locale string have the format lang[_ctry][.encoding][@modifier]
+    // Let LanguageTag handle all conversion, but do a sanity and length check
+    // first.
+    // For the fallback we are only interested in the first two items, so we
+    // handle '.' and '@' as string end for that.
+    for (cp = locale; *cp; cp++)
+    {
+        if (*cp == '_' && !uscore)
+            uscore = cp;
+        if ((*cp == '.' || *cp == '@') && !end)
+            end = cp;
+        if (!rtl::isAscii(static_cast<unsigned char>(*cp))) {
+            SAL_INFO("shell", "locale env var with non-ASCII content");
+            return {false, {}};
+        }
+    }
+    assert(cp >= locale);
+    if (cp - locale > std::numeric_limits<sal_Int32>::max()) {
+        SAL_INFO("shell", "locale env var content too long");
+        return {false, {}};
+    }
+
+    // This is a tad awkward... but the easiest way to obtain what we're
+    // actually interested in. For example this also converts
+    // "ca_ES.UTF-8@valencia" to "ca-ES-valencia".
+    const OString aLocaleStr(locale);
+    const LanguageType nLang = MsLangId::convertUnxByteStringToLanguage( aLocaleStr);
+    if (nLang != LANGUAGE_DONTKNOW)
+    {
+        const OUString aLangTagStr( LanguageTag::convertToBcp47( nLang));
+        return {true, css::uno::Any(aLangTagStr)};
+    }
+
+    // As a fallback, strip encoding and modifier and return just a
+    // language-country combination and let the caller handle unknowns.
+    OUStringBuffer aLocaleBuffer;
+    if (!end)
+        end = cp;
+    if( uscore != nullptr )
+    {
+        aLocaleBuffer.appendAscii(locale, uscore++ - locale);
+        aLocaleBuffer.append("-");
+        aLocaleBuffer.appendAscii(uscore, end - uscore);
+    }
+    else
+    {
+        aLocaleBuffer.appendAscii(locale, end - locale);
+    }
+
+    return {true, css::uno::Any(aLocaleBuffer.makeStringAndClear())};
+}
+
+#endif
+
+
+LocaleBackend::LocaleBackend()
+{
+}
+
+
+LocaleBackend::~LocaleBackend()
+{
+}
+
+
+
+css::beans::Optional<css::uno::Any> LocaleBackend::getLocale()
+{
+#if defined(_WIN32)
+    return ImplGetLocale( GetUserDefaultLCID() );
+#elif defined (MACOSX)
+    return ImplGetLocale("AppleLocale");
+#else
+    return ImplGetLocale("LC_CTYPE");
+#endif
+}
+
+
+css::beans::Optional<css::uno::Any> LocaleBackend::getUILocale()
+{
+#if defined(_WIN32)
+    return ImplGetLocale( MAKELCID(GetUserDefaultUILanguage(), SORT_DEFAULT) );
+#elif defined(MACOSX)
+    return ImplGetLocale("AppleLanguages");
+#else
+    return ImplGetLocale("LC_MESSAGES");
+#endif
+}
+
+
+css::beans::Optional<css::uno::Any> LocaleBackend::getSystemLocale()
+{
+// note: the implementation differs from getLocale() only on Windows
+#if defined(_WIN32)
+    return ImplGetLocale( GetSystemDefaultLCID() );
+#else
+    return getLocale();
+#endif
+}
+
+
+void LocaleBackend::setPropertyValue(
+    OUString const &, css::uno::Any const &)
+{
+    throw css::lang::IllegalArgumentException(
+        "setPropertyValue not supported",
+        static_cast< cppu::OWeakObject * >(this), -1);
+}
+
+css::uno::Any LocaleBackend::getPropertyValue(
+    OUString const & PropertyName)
+{
+    if ( PropertyName == "Locale" ) {
+        return css::uno::Any(getLocale());
+    } else if (PropertyName == "SystemLocale")
+    {
+        return css::uno::Any(getSystemLocale());
+    } else if (PropertyName == "UILocale")
+    {
+        return css::uno::Any(getUILocale());
+    } else {
+        throw css::beans::UnknownPropertyException(
+            PropertyName, static_cast< cppu::OWeakObject * >(this));
+    }
+}
+
+
+OUString SAL_CALL LocaleBackend::getImplementationName()
+{
+    return "com.sun.star.comp.configuration.backend.LocaleBackend" ;
+}
+
+sal_Bool SAL_CALL LocaleBackend::supportsService(const OUString& aServiceName)
+{
+    return cppu::supportsService(this, aServiceName);
+}
+
+uno::Sequence<OUString> SAL_CALL LocaleBackend::getSupportedServiceNames()
+{
+    return { "com.sun.star.configuration.backend.LocaleBackend" };
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+shell_LocaleBackend_get_implementation(
+    css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new LocaleBackend());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/backends/localebe/localebackend.hxx b/shell/source/backends/localebe/localebackend.hxx
new file mode 100644
index 000000000..e2e4a0b36
--- /dev/null
+++ b/shell/source/backends/localebe/localebackend.hxx
@@ -0,0 +1,106 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SHELL_SOURCE_BACKENDS_LOCALEBE_LOCALEBACKEND_HXX
+#define INCLUDED_SHELL_SOURCE_BACKENDS_LOCALEBE_LOCALEBACKEND_HXX
+
+#include <sal/config.h>
+
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <cppuhelper/implbase.hxx>
+
+
+namespace uno = css::uno ;
+namespace lang = css::lang ;
+
+class LocaleBackend final : public ::cppu::WeakImplHelper <
+        css::beans::XPropertySet,
+        lang::XServiceInfo >
+{
+
+    public:
+
+        // XServiceInfo
+        virtual OUString SAL_CALL
+            getImplementationName(  ) override ;
+
+        virtual sal_Bool SAL_CALL
+            supportsService( const OUString& aServiceName ) override ;
+
+        virtual uno::Sequence<OUString> SAL_CALL
+            getSupportedServiceNames(  ) override ;
+
+        // XPropertySet
+        virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL
+        getPropertySetInfo() override
+        { return css::uno::Reference< css::beans::XPropertySetInfo >(); }
+
+        virtual void SAL_CALL setPropertyValue(
+            OUString const &, css::uno::Any const &) override;
+
+        virtual css::uno::Any SAL_CALL getPropertyValue(
+            OUString const & PropertyName) override;
+
+        virtual void SAL_CALL addPropertyChangeListener(
+            OUString const &,
+            css::uno::Reference< css::beans::XPropertyChangeListener > const &) override
+        {}
+
+        virtual void SAL_CALL removePropertyChangeListener(
+            OUString const &,
+            css::uno::Reference< css::beans::XPropertyChangeListener > const &) override
+        {}
+
+        virtual void SAL_CALL addVetoableChangeListener(
+            OUString const &,
+            css::uno::Reference< css::beans::XVetoableChangeListener > const &) override
+        {}
+
+        virtual void SAL_CALL removeVetoableChangeListener(
+            OUString const &,
+            css::uno::Reference< css::beans::XVetoableChangeListener > const &) override
+        {}
+
+        /**
+          Service constructor from a service factory.
+
+          @param xContext   component context
+          */
+        LocaleBackend();
+
+        /** Destructor */
+        virtual ~LocaleBackend() override ;
+
+    private:
+        // Returns the user locale
+        static css::beans::Optional<css::uno::Any> getLocale();
+
+        // Returns the user UI locale
+        static css::beans::Optional<css::uno::Any> getUILocale();
+
+        // Returns the system default locale
+        static css::beans::Optional<css::uno::Any> getSystemLocale();
+} ;
+
+
+#endif // INCLUDED_SHELL_SOURCE_BACKENDS_LOCALEBE_LOCALEBACKEND_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/backends/localebe/localebe1.component b/shell/source/backends/localebe/localebe1.component
new file mode 100644
index 000000000..f19a3f9e8
--- /dev/null
+++ b/shell/source/backends/localebe/localebe1.component
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.configuration.backend.LocaleBackend"
+    constructor="shell_LocaleBackend_get_implementation">
+    <service name="com.sun.star.configuration.backend.LocaleBackend"/>
+  </implementation>
+</component>
diff --git a/shell/source/backends/macbe/macbackend.hxx b/shell/source/backends/macbe/macbackend.hxx
new file mode 100644
index 000000000..9a19a3002
--- /dev/null
+++ b/shell/source/backends/macbe/macbackend.hxx
@@ -0,0 +1,90 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SHELL_SOURCE_BACKENDS_MACBE_MACBACKEND_HXX
+#define INCLUDED_SHELL_SOURCE_BACKENDS_MACBE_MACBACKEND_HXX
+
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <rtl/string.hxx>
+
+// FIXME: stdio.h only for debugging...
+#include <stdio.h>
+
+namespace uno = css::uno;
+namespace lang = css::lang;
+
+class MacOSXBackend : public ::cppu::WeakImplHelper <css::beans::XPropertySet, lang::XServiceInfo >
+{
+
+public:
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+
+    virtual sal_Bool SAL_CALL supportsService(const OUString& aServiceName) override;
+
+    virtual uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+    // XPropertySet
+    virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL
+    getPropertySetInfo() override
+    { return css::uno::Reference< css::beans::XPropertySetInfo >(); }
+
+    virtual void SAL_CALL setPropertyValue(
+        OUString const &, css::uno::Any const &) override;
+
+    virtual css::uno::Any SAL_CALL getPropertyValue(
+        OUString const & PropertyName) override;
+
+    virtual void SAL_CALL addPropertyChangeListener(
+        OUString const &,
+        css::uno::Reference< css::beans::XPropertyChangeListener > const &) override
+    {}
+
+    virtual void SAL_CALL removePropertyChangeListener(
+        OUString const &,
+        css::uno::Reference< css::beans::XPropertyChangeListener > const &) override
+    {}
+
+    virtual void SAL_CALL addVetoableChangeListener(
+        OUString const &,
+        css::uno::Reference< css::beans::XVetoableChangeListener > const &) override
+    {}
+
+    virtual void SAL_CALL removeVetoableChangeListener(
+        OUString const &,
+        css::uno::Reference< css::beans::XVetoableChangeListener > const &) override
+    {}
+
+    /**
+       Service constructor from a service factory.
+
+       @param xContext   component context
+    */
+    MacOSXBackend();
+
+    /** Destructor */
+    virtual ~MacOSXBackend() override;
+};
+
+#endif // INCLUDED_SHELL_SOURCE_BACKENDS_MACBE_MACBACKEND_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/backends/macbe/macbackend.mm b/shell/source/backends/macbe/macbackend.mm
new file mode 100644
index 000000000..cb35a4b9d
--- /dev/null
+++ b/shell/source/backends/macbe/macbackend.mm
@@ -0,0 +1,395 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+// For MAXHOSTNAMELEN constant
+#include <sys/param.h>
+
+#include <premac.h>
+#include <SystemConfiguration/SystemConfiguration.h>
+#include <Foundation/NSPathUtilities.h>
+#include <postmac.h>
+
+#include "macbackend.hxx"
+
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <cppuhelper/supportsservice.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <sal/log.hxx>
+#include <osl/diagnose.h>
+#include <osl/file.h>
+
+#define SPACE      ' '
+#define SEMI_COLON ';'
+
+namespace
+{
+
+typedef enum {
+    sHTTP,
+    sHTTPS,
+    sFTP
+} ServiceType;
+
+/*
+ * Returns current proxy settings for selected service type (HTTP or
+ * FTP) as a C string (in the buffer specified by host and hostSize)
+ * and a port number.
+ */
+
+bool GetProxySetting(ServiceType sType, char *host, size_t hostSize, UInt16 *port)
+{
+    bool                result;
+    CFDictionaryRef     proxyDict;
+    CFNumberRef         enableNum;
+    int                 enable;
+    CFStringRef         hostStr;
+    CFNumberRef         portNum;
+    int                 portInt;
+
+    proxyDict = SCDynamicStoreCopyProxies(nullptr);
+
+    if (!proxyDict)
+        return false;
+
+    CFStringRef proxiesEnable;
+    CFStringRef proxiesProxy;
+    CFStringRef proxiesPort;
+
+    switch ( sType )
+    {
+        case sHTTP : proxiesEnable =  kSCPropNetProxiesHTTPEnable;
+                     proxiesProxy = kSCPropNetProxiesHTTPProxy;
+                     proxiesPort = kSCPropNetProxiesHTTPPort;
+            break;
+        case sHTTPS: proxiesEnable = kSCPropNetProxiesHTTPSEnable;
+                     proxiesProxy = kSCPropNetProxiesHTTPSProxy;
+                     proxiesPort = kSCPropNetProxiesHTTPSPort;
+            break;
+        default: proxiesEnable = kSCPropNetProxiesFTPEnable;
+                 proxiesProxy = kSCPropNetProxiesFTPProxy;
+                 proxiesPort = kSCPropNetProxiesFTPPort;
+            break;
+    }
+    // Proxy enabled?
+    enableNum = static_cast<CFNumberRef>(CFDictionaryGetValue( proxyDict,
+                                                   proxiesEnable ));
+
+    result = (enableNum != nullptr) && (CFGetTypeID(enableNum) == CFNumberGetTypeID());
+
+    if (result)
+        result = CFNumberGetValue(enableNum, kCFNumberIntType, &enable) && (enable != 0);
+
+    // Proxy enabled -> get hostname
+    if (result)
+    {
+        hostStr = static_cast<CFStringRef>(CFDictionaryGetValue( proxyDict,
+                                                     proxiesProxy ));
+
+        result = (hostStr != nullptr) && (CFGetTypeID(hostStr) == CFStringGetTypeID());
+    }
+
+    if (result)
+        result = CFStringGetCString(hostStr, host, static_cast<CFIndex>(hostSize), kCFStringEncodingASCII);
+
+    // Get proxy port
+    if (result)
+    {
+        portNum = static_cast<CFNumberRef>(CFDictionaryGetValue( proxyDict,
+                                                     proxiesPort ));
+
+        result = (portNum != nullptr) && (CFGetTypeID(portNum) == CFNumberGetTypeID());
+    }
+    else
+    {
+        CFRelease(proxyDict);
+        return false;
+    }
+
+    if (result)
+        result = CFNumberGetValue(portNum, kCFNumberIntType, &portInt);
+
+    if (result)
+        *port = static_cast<UInt16>(portInt);
+
+    if (proxyDict)
+        CFRelease(proxyDict);
+
+    if (!result)
+    {
+        *host = 0;
+        *port = 0;
+    }
+
+    return result;
+}
+
+} // unnamed namespace
+
+MacOSXBackend::MacOSXBackend()
+{
+}
+
+MacOSXBackend::~MacOSXBackend(void)
+{
+}
+
+static OUString CFStringToOUString(const CFStringRef sOrig) {
+    CFRetain(sOrig);
+
+    CFIndex nStringLen = CFStringGetLength(sOrig)+1;
+
+    // Allocate a c string buffer
+    char sBuffer[nStringLen];
+
+    CFStringGetCString(sOrig, sBuffer, nStringLen, kCFStringEncodingASCII);
+
+    CFRelease(sOrig);
+
+    return OUString::createFromAscii(sBuffer);
+}
+
+static OUString GetOUString( NSString* pStr )
+{
+    if( ! pStr )
+        return OUString();
+    int nLen = [pStr length];
+    if( nLen == 0 )
+        return OUString();
+
+    OUStringBuffer aBuf( nLen+1 );
+    aBuf.setLength( nLen );
+    [pStr getCharacters:
+     reinterpret_cast<unichar *>(const_cast<sal_Unicode*>(aBuf.getStr()))];
+    return aBuf.makeStringAndClear();
+}
+
+void MacOSXBackend::setPropertyValue(
+    OUString const &, css::uno::Any const &)
+{
+    throw css::lang::IllegalArgumentException(
+        "setPropertyValue not supported",
+        static_cast< cppu::OWeakObject * >(this), -1);
+}
+
+css::uno::Any MacOSXBackend::getPropertyValue(
+    OUString const & PropertyName)
+{
+    if ( PropertyName == "WorkPathVariable" )
+    {
+        OUString aDocDir;
+        NSArray* pPaths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, true );
+        if( pPaths && [pPaths count] > 0 )
+        {
+            aDocDir = GetOUString( [pPaths objectAtIndex: 0] );
+
+            OUString aDocURL;
+            if( aDocDir.getLength() > 0 &&
+                osl_getFileURLFromSystemPath( aDocDir.pData, &aDocURL.pData ) == osl_File_E_None )
+            {
+                return css::uno::Any(
+                    css::beans::Optional< css::uno::Any >(
+                        true, css::uno::Any( aDocURL ) ) );
+            }
+            else
+            {
+                SAL_WARN("shell", "user documents list contains empty file path or conversion failed" );
+            }
+        }
+        else
+        {
+            SAL_WARN("shell", "Got nil or empty list of user document directories" );
+        }
+        return css::uno::Any(css::beans::Optional< css::uno::Any >());
+    } else if ( PropertyName == "ooInetFTPProxyName" )
+    {
+        char host[MAXHOSTNAMELEN];
+        UInt16 port;
+        bool retVal;
+
+        retVal = GetProxySetting(sFTP, host, 100, &port);
+
+        if (retVal)
+        {
+            auto const Server = OUString::createFromAscii( host );
+            if( Server.getLength() > 0 )
+            {
+                return css::uno::Any(
+                    css::beans::Optional< css::uno::Any >(
+                        true, uno::Any( Server ) ) );
+            }
+        }
+        return css::uno::Any(css::beans::Optional< css::uno::Any >());
+    } else if ( PropertyName == "ooInetFTPProxyPort" )
+    {
+        char host[MAXHOSTNAMELEN];
+        UInt16 port;
+        bool retVal;
+
+        retVal = GetProxySetting(sFTP, host, 100, &port);
+
+        if (retVal && port > 0)
+        {
+            return css::uno::Any(
+                css::beans::Optional< css::uno::Any >(
+                    true, uno::Any( sal_Int32(port) ) ) );
+        }
+        return css::uno::Any(css::beans::Optional< css::uno::Any >());
+    } else if ( PropertyName == "ooInetHTTPProxyName" )
+    {
+        char host[MAXHOSTNAMELEN];
+        UInt16 port;
+        bool retVal;
+
+        retVal = GetProxySetting(sHTTP, host, 100, &port);
+
+        if (retVal)
+        {
+            auto const Server = OUString::createFromAscii( host );
+            if( Server.getLength() > 0 )
+            {
+                return css::uno::Any(
+                    css::beans::Optional< css::uno::Any >(
+                        true, uno::Any( Server ) ) );
+            }
+        }
+        return css::uno::Any(css::beans::Optional< css::uno::Any >());
+    } else if ( PropertyName == "ooInetHTTPProxyPort" )
+    {
+        char host[MAXHOSTNAMELEN];
+        UInt16 port;
+        bool retVal;
+
+        retVal = GetProxySetting(sHTTP, host, 100, &port);
+
+        if (retVal && port > 0)
+        {
+            return css::uno::Any(
+                css::beans::Optional< css::uno::Any >(
+                    true, uno::Any( sal_Int32(port) ) ) );
+        }
+        return css::uno::Any(css::beans::Optional< css::uno::Any >());
+    } else if ( PropertyName == "ooInetHTTPSProxyName" )
+    {
+        char host[MAXHOSTNAMELEN];
+        UInt16 port;
+        bool retVal;
+
+        retVal = GetProxySetting(sHTTPS, host, 100, &port);
+
+        if (retVal)
+        {
+            auto const Server = OUString::createFromAscii( host );
+            if( Server.getLength() > 0 )
+            {
+                return css::uno::Any(
+                    css::beans::Optional< css::uno::Any >(
+                        true, uno::Any( Server ) ) );
+            }
+        }
+        return css::uno::Any(css::beans::Optional< css::uno::Any >());
+    } else if ( PropertyName == "ooInetHTTPSProxyPort" )
+    {
+        char host[MAXHOSTNAMELEN];
+        UInt16 port;
+        bool retVal;
+
+        retVal = GetProxySetting(sHTTPS, host, 100, &port);
+
+        if (retVal && port > 0)
+        {
+            return css::uno::Any(
+                css::beans::Optional< css::uno::Any >(
+                    true, uno::Any( sal_Int32(port) ) ) );
+        }
+        return css::uno::Any(css::beans::Optional< css::uno::Any >());
+    } else if ( PropertyName == "ooInetProxyType" )
+    {
+        // override default for ProxyType, which is "0" meaning "No proxies".
+        return css::uno::Any(
+            css::beans::Optional< css::uno::Any >(
+                true, uno::Any( sal_Int32(1) ) ) );
+    } else if ( PropertyName == "ooInetNoProxy" )
+    {
+        OUString aProxyBypassList;
+
+        CFArrayRef rExceptionsList;
+        CFDictionaryRef rProxyDict = SCDynamicStoreCopyProxies(nullptr);
+
+        if (!rProxyDict)
+            rExceptionsList = nullptr;
+        else
+            rExceptionsList = static_cast<CFArrayRef>(CFDictionaryGetValue(rProxyDict, kSCPropNetProxiesExceptionsList));
+
+        if (rExceptionsList)
+        {
+            for (CFIndex idx = 0; idx < CFArrayGetCount(rExceptionsList); idx++)
+            {
+                CFStringRef rException = static_cast<CFStringRef>(CFArrayGetValueAtIndex(rExceptionsList, idx));
+
+                if (idx>0)
+                    aProxyBypassList += ";";
+
+                aProxyBypassList += CFStringToOUString(rException);
+            }
+        }
+
+        if (rProxyDict)
+            CFRelease(rProxyDict);
+
+        // fill proxy bypass list
+        if( aProxyBypassList.getLength() > 0 )
+        {
+            return css::uno::Any(
+                css::beans::Optional< css::uno::Any >(
+                    true,
+                    uno::Any( aProxyBypassList.replace( SPACE, SEMI_COLON ) ) ) );
+        }
+        return css::uno::Any(css::beans::Optional< css::uno::Any >());
+    } else {
+        throw css::beans::UnknownPropertyException(
+            PropertyName, static_cast< cppu::OWeakObject * >(this));
+    }
+}
+
+OUString SAL_CALL MacOSXBackend::getImplementationName(void)
+{
+    return "com.sun.star.comp.configuration.backend.MacOSXBackend";
+}
+
+sal_Bool SAL_CALL MacOSXBackend::supportsService(const OUString& aServiceName)
+{
+    return cppu::supportsService(this, aServiceName);
+}
+
+uno::Sequence<OUString> SAL_CALL MacOSXBackend::getSupportedServiceNames(void)
+{
+    return { "com.sun.star.configuration.backend.MacOSXBackend" };
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+shell_MacOSXBackend_get_implementation(
+    css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new MacOSXBackend());
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/backends/macbe/macbe1.component b/shell/source/backends/macbe/macbe1.component
new file mode 100644
index 000000000..8b42dc2e4
--- /dev/null
+++ b/shell/source/backends/macbe/macbe1.component
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.configuration.backend.MacOSXBackend"
+    constructor="shell_MacOSXBackend_get_implementation">
+    <service name="com.sun.star.configuration.backend.MacOSXBackend"/>
+  </implementation>
+</component>
diff --git a/shell/source/backends/wininetbe/wininetbackend.cxx b/shell/source/backends/wininetbe/wininetbackend.cxx
new file mode 100644
index 000000000..71de3b135
--- /dev/null
+++ b/shell/source/backends/wininetbe/wininetbackend.cxx
@@ -0,0 +1,363 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this 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 <string_view>
+
+#include <cppuhelper/supportsservice.hxx>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <o3tl/string_view.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <sal/log.hxx>
+
+#include "wininetbackend.hxx"
+
+#if !defined WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#include <wininet.h>
+#include <sal/alloca.h>
+
+#define WININET_DLL_NAME L"wininet.dll"
+#define EQUAL_SIGN '='
+#define COLON      ':'
+#define SPACE      ' '
+#define SEMI_COLON ';'
+
+namespace {
+
+struct Library {
+    HMODULE module;
+
+    explicit Library(HMODULE theModule): module(theModule) {}
+
+    ~Library() { if (module) FreeLibrary(module); }
+};
+
+struct ProxyEntry
+{
+    OUString Server;
+    OUString Port;
+};
+
+    ProxyEntry ReadProxyEntry(std::u16string_view aProxy, std::size_t& i)
+    {
+        ProxyEntry aProxyEntry;
+
+        aProxyEntry.Server = o3tl::getToken( aProxy, COLON, i );
+        if ( i != std::u16string_view::npos )
+            aProxyEntry.Port = o3tl::getToken( aProxy, COLON, i );
+
+        return aProxyEntry;
+    }
+
+    ProxyEntry FindProxyEntry(std::u16string_view aProxyList, std::u16string_view aType)
+    {
+        std::size_t nIndex = 0;
+
+        do
+        {
+            // get the next token, e.g. ftp=server:port
+            std::u16string_view nextToken = o3tl::getToken( aProxyList, SPACE, nIndex );
+
+            // split the next token again into the parts separated
+            // through '=', e.g. ftp=server:port -> ftp and server:port
+            std::size_t i = 0;
+            if( nextToken.find( EQUAL_SIGN ) != std::u16string_view::npos )
+            {
+                if( aType == o3tl::getToken( nextToken, EQUAL_SIGN, i ) )
+                    return ReadProxyEntry(nextToken, i);
+            }
+            else if( aType.empty())
+                return ReadProxyEntry(nextToken, i);
+
+        } while ( nIndex != std::u16string_view::npos );
+
+        return ProxyEntry();
+    }
+
+} // unnamed namespace
+
+WinInetBackend::WinInetBackend()
+{
+    Library hWinInetDll( LoadLibraryW( WININET_DLL_NAME ) );
+    if( hWinInetDll.module )
+    {
+        typedef BOOL ( WINAPI *InternetQueryOption_Proc_T )( HINTERNET, DWORD, LPVOID, LPDWORD );
+
+        InternetQueryOption_Proc_T lpfnInternetQueryOption =
+            reinterpret_cast< InternetQueryOption_Proc_T >(
+                GetProcAddress( hWinInetDll.module, "InternetQueryOptionW" ) );
+        if (lpfnInternetQueryOption)
+        {
+            // Some Windows versions would fail the InternetQueryOption call
+            // with ERROR_OUTOFMEMORY when the initial dwLength were zero (and
+            // are apparently fine with the initial sizeof (INTERNET_PROXY_INFO)
+            // and need no reallocation), while other versions fail with
+            // ERROR_INSUFFICIENT_BUFFER upon that initial dwLength and need a
+            // reallocation:
+            INTERNET_PROXY_INFO pi;
+            LPINTERNET_PROXY_INFO lpi = &pi;
+            DWORD dwLength = sizeof (pi);
+            bool ok = lpfnInternetQueryOption(
+                nullptr,
+                INTERNET_OPTION_PROXY,
+                lpi,
+                &dwLength );
+            if (!ok)
+            {
+                DWORD err = GetLastError();
+                if (err == ERROR_INSUFFICIENT_BUFFER)
+                {
+                    // allocate sufficient space on the stack
+                    // insufficient space on the stack results
+                    // in a stack overflow exception, we assume
+                    // this never happens, because of the relatively
+                    // small amount of memory we need
+                    // alloca is nice because it is fast and we don't
+                    // have to free the allocated memory, it will be
+                    // automatically done
+                    lpi = static_cast< LPINTERNET_PROXY_INFO >(
+                        alloca( dwLength ) );
+                    ok = lpfnInternetQueryOption(
+                        nullptr,
+                        INTERNET_OPTION_PROXY,
+                        lpi,
+                        &dwLength );
+                    if (!ok)
+                    {
+                        err = GetLastError();
+                    }
+                }
+                if (!ok)
+                {
+                    SAL_WARN(
+                        "shell",
+                        "InternetQueryOption INTERNET_OPTION_PROXY"
+                            " GetLastError=" << err);
+                    return;
+                }
+            }
+
+            // if a proxy is disabled, InternetQueryOption returns
+            // an empty proxy list, so we don't have to check if
+            // proxy is enabled or not
+
+            // We use InternetQueryOptionW (see https://msdn.microsoft.com/en-us/library/aa385101);
+            // it fills INTERNET_PROXY_INFO struct which is defined in WinInet.h to have LPCTSTR
+            // (i.e., the UNICODE-dependent generic string type expanding to const wchar_t* when
+            // UNICODE is defined, and InternetQueryOption macro expands to InternetQueryOptionW).
+            // Thus, it's natural to expect that W version would return wide strings. But it's not
+            // true. The W version still returns const char* in INTERNET_PROXY_INFO.
+            OUString aProxyList       = OUString::createFromAscii( lpi->lpszProxy );
+            OUString aProxyBypassList = OUString::createFromAscii( lpi->lpszProxyBypass );
+
+            // override default for ProxyType, which is "0" meaning "No proxies".
+            valueProxyType_.IsPresent = true;
+            valueProxyType_.Value <<= sal_Int32(1);
+
+            // fill proxy bypass list
+            if( aProxyBypassList.getLength() > 0 )
+            {
+                OUStringBuffer aReverseList;
+                sal_Int32 nIndex = 0;
+                do
+                {
+                    OUString aToken = aProxyBypassList.getToken( 0, SPACE, nIndex );
+                    if ( aProxyList.indexOf( aToken ) == -1 )
+                    {
+                        if ( aReverseList.getLength() )
+                        {
+                            aReverseList.insert( 0, sal_Unicode( SEMI_COLON ) );
+                            aReverseList.insert( 0, aToken );
+                        }
+                        else
+                            aReverseList = aToken;
+                    }
+                }
+                while ( nIndex >= 0 );
+
+                aProxyBypassList = aReverseList.makeStringAndClear();
+
+                valueNoProxy_.IsPresent = true;
+                valueNoProxy_.Value <<= aProxyBypassList.replace( SPACE, SEMI_COLON );
+            }
+
+            if( aProxyList.getLength() > 0 )
+            {
+
+                // this implementation follows the algorithm
+                // of the internet explorer
+                // if there are type-dependent proxy settings
+                // and type independent proxy settings in the
+                // registry the internet explorer chooses the
+                // type independent proxy for all settings
+                // e.g. imagine the following registry entry
+                // ftp=server:port;http=server:port;server:port
+                // the last token server:port is type independent
+                // so the ie chooses this proxy server
+
+                // if there is no port specified for a type independent
+                // server the ie uses the port of an http server if
+                // there is one and it has a port
+
+
+                ProxyEntry aTypeIndepProxy = FindProxyEntry( aProxyList, u"");
+                ProxyEntry aHttpProxy = FindProxyEntry( aProxyList, u"http" );
+                ProxyEntry aHttpsProxy  = FindProxyEntry( aProxyList, u"https" );
+
+                ProxyEntry aFtpProxy  = FindProxyEntry( aProxyList, u"ftp" );
+
+                if( aTypeIndepProxy.Server.getLength() )
+                {
+                    aHttpProxy.Server = aTypeIndepProxy.Server;
+                    aHttpsProxy.Server  = aTypeIndepProxy.Server;
+                    aFtpProxy.Server  = aTypeIndepProxy.Server;
+
+                    if( aTypeIndepProxy.Port.getLength() )
+                    {
+                        aHttpProxy.Port = aTypeIndepProxy.Port;
+                        aHttpsProxy.Port  = aTypeIndepProxy.Port;
+                        aFtpProxy.Port  = aTypeIndepProxy.Port;
+                    }
+                    else
+                    {
+                        aFtpProxy.Port  = aHttpProxy.Port;
+                        aHttpsProxy.Port  = aHttpProxy.Port;
+                    }
+                }
+
+                // http proxy name
+                if( aHttpProxy.Server.getLength() > 0 )
+                {
+                    valueHttpProxyName_.IsPresent = true;
+                    valueHttpProxyName_.Value <<= aHttpProxy.Server;
+                }
+
+                // http proxy port
+                if( aHttpProxy.Port.getLength() > 0 )
+                {
+                    valueHttpProxyPort_.IsPresent = true;
+                    valueHttpProxyPort_.Value <<= aHttpProxy.Port.toInt32();
+                }
+
+                // https proxy name
+                if( aHttpsProxy.Server.getLength() > 0 )
+                {
+                    valueHttpsProxyName_.IsPresent = true;
+                    valueHttpsProxyName_.Value <<= aHttpsProxy.Server;
+                }
+
+                // https proxy port
+                if( aHttpsProxy.Port.getLength() > 0 )
+                {
+                    valueHttpsProxyPort_.IsPresent = true;
+                    valueHttpsProxyPort_.Value <<= aHttpsProxy.Port.toInt32();
+                }
+
+                // ftp proxy name
+                if( aFtpProxy.Server.getLength() > 0 )
+                {
+                    valueFtpProxyName_.IsPresent = true;
+                    valueFtpProxyName_.Value <<= aFtpProxy.Server;
+                }
+
+                // ftp proxy port
+                if( aFtpProxy.Port.getLength() > 0 )
+                {
+                    valueFtpProxyPort_.IsPresent = true;
+                    valueFtpProxyPort_.Value <<= aFtpProxy.Port.toInt32();
+                }
+            }
+        }
+    }
+}
+
+WinInetBackend::~WinInetBackend()
+{
+}
+
+void WinInetBackend::setPropertyValue(
+    OUString const &, css::uno::Any const &)
+{
+    throw css::lang::IllegalArgumentException(
+        "setPropertyValue not supported",
+        static_cast< cppu::OWeakObject * >(this), -1);
+}
+
+css::uno::Any WinInetBackend::getPropertyValue(
+    OUString const & PropertyName)
+{
+    if ( PropertyName == "ooInetFTPProxyName" )
+    {
+        return css::uno::Any(valueFtpProxyName_);
+    } else if ( PropertyName == "ooInetFTPProxyPort" )
+    {
+        return css::uno::Any(valueFtpProxyPort_);
+    } else if ( PropertyName == "ooInetHTTPProxyName" )
+    {
+        return css::uno::Any(valueHttpProxyName_);
+    } else if ( PropertyName == "ooInetHTTPProxyPort" )
+    {
+        return css::uno::Any(valueHttpProxyPort_);
+    } else if ( PropertyName == "ooInetHTTPSProxyName" )
+    {
+        return css::uno::Any(valueHttpsProxyName_);
+    } else if ( PropertyName == "ooInetHTTPSProxyPort" )
+    {
+        return css::uno::Any(valueHttpsProxyPort_);
+    } else if ( PropertyName == "ooInetNoProxy" )
+    {
+        return css::uno::Any(valueNoProxy_);
+    } else if ( PropertyName == "ooInetProxyType" )
+    {
+        return css::uno::Any(valueProxyType_);
+    } else {
+        throw css::beans::UnknownPropertyException(
+            PropertyName, static_cast< cppu::OWeakObject * >(this));
+    }
+}
+
+OUString SAL_CALL WinInetBackend::getImplementationName()
+{
+    return "com.sun.star.comp.configuration.backend.WinInetBackend" ;
+}
+
+sal_Bool SAL_CALL WinInetBackend::supportsService(const OUString& aServiceName)
+{
+    return cppu::supportsService(this, aServiceName);
+}
+
+uno::Sequence<OUString> SAL_CALL WinInetBackend::getSupportedServiceNames()
+{
+    return { "com.sun.star.configuration.backend.WinInetBackend" };
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+shell_WinInetBackend_get_implementation(
+    css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new WinInetBackend);
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/backends/wininetbe/wininetbackend.hxx b/shell/source/backends/wininetbe/wininetbackend.hxx
new file mode 100644
index 000000000..1b5f4ecbf
--- /dev/null
+++ b/shell/source/backends/wininetbe/wininetbackend.hxx
@@ -0,0 +1,110 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SHELL_SOURCE_BACKENDS_WININETBE_WININETBACKEND_HXX
+#define INCLUDED_SHELL_SOURCE_BACKENDS_WININETBE_WININETBACKEND_HXX
+
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <cppuhelper/implbase.hxx>
+
+namespace uno = css::uno ;
+namespace lang = css::lang ;
+
+class WinInetBackend : public ::cppu::WeakImplHelper <
+        css::beans::XPropertySet,
+        lang::XServiceInfo > {
+
+    public:
+
+        // XServiceInfo
+        virtual OUString SAL_CALL
+            getImplementationName(  ) override;
+
+        virtual sal_Bool SAL_CALL
+            supportsService( const OUString& aServiceName ) override;
+
+        virtual uno::Sequence<OUString> SAL_CALL
+            getSupportedServiceNames(  ) override;
+
+        // XPropertySet
+        virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL
+        getPropertySetInfo() override
+        { return css::uno::Reference< css::beans::XPropertySetInfo >(); }
+
+        virtual void SAL_CALL setPropertyValue(
+            OUString const &, css::uno::Any const &) override;
+
+        virtual css::uno::Any SAL_CALL getPropertyValue(
+            OUString const & PropertyName) override;
+
+        virtual void SAL_CALL addPropertyChangeListener(
+            OUString const &,
+            css::uno::Reference< css::beans::XPropertyChangeListener > const &) override
+        {}
+
+        virtual void SAL_CALL removePropertyChangeListener(
+            OUString const &,
+            css::uno::Reference< css::beans::XPropertyChangeListener > const &) override
+        {}
+
+        virtual void SAL_CALL addVetoableChangeListener(
+            OUString const &,
+            css::uno::Reference< css::beans::XVetoableChangeListener > const &) override
+        {}
+
+        virtual void SAL_CALL removeVetoableChangeListener(
+            OUString const &,
+            css::uno::Reference< css::beans::XVetoableChangeListener > const &) override
+        {}
+
+        /**
+          Service constructor from a service factory.
+
+          @param xContext   component context
+          */
+        WinInetBackend();
+
+        /** Destructor */
+        ~WinInetBackend() override;
+
+    private:
+        css::beans::Optional< css::uno::Any >
+            valueProxyType_;
+        css::beans::Optional< css::uno::Any >
+            valueNoProxy_;
+        css::beans::Optional< css::uno::Any >
+            valueHttpProxyName_;
+        css::beans::Optional< css::uno::Any >
+            valueHttpProxyPort_;
+        css::beans::Optional< css::uno::Any >
+            valueHttpsProxyName_;
+        css::beans::Optional< css::uno::Any >
+            valueHttpsProxyPort_;
+        css::beans::Optional< css::uno::Any >
+            valueFtpProxyName_;
+        css::beans::Optional< css::uno::Any >
+            valueFtpProxyPort_;
+} ;
+
+
+#endif // INCLUDED_SHELL_SOURCE_BACKENDS_WININETBE_WININETBACKEND_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/backends/wininetbe/wininetbe1.component b/shell/source/backends/wininetbe/wininetbe1.component
new file mode 100644
index 000000000..1acdee781
--- /dev/null
+++ b/shell/source/backends/wininetbe/wininetbe1.component
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.configuration.backend.WinInetBackend"
+    constructor="shell_WinInetBackend_get_implementation">
+    <service name="com.sun.star.configuration.backend.WinInetBackend"/>
+  </implementation>
+</component>