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diff --git a/desktop/source/deployment/inc/dp_update.hxx b/desktop/source/deployment/inc/dp_update.hxx
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index 000000000..8dce9b583
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+++ b/desktop/source/deployment/inc/dp_update.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+
+#include <com/sun/star/deployment/XPackage.hpp>
+#include <com/sun/star/deployment/XExtensionManager.hpp>
+#include <com/sun/star/deployment/XUpdateInformationProvider.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/xml/dom/XNode.hpp>
+
+#include "dp_misc_api.hxx"
+
+#include <map>
+#include <vector>
+
+namespace dp_misc {
+
+/** returns the default update URL (for the update information) which
+    is used when an extension does not provide its own URL.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+OUString getExtensionDefaultUpdateURL();
+
+enum UPDATE_SOURCE
+{
+    UPDATE_SOURCE_NONE,
+    UPDATE_SOURCE_SHARED,
+    UPDATE_SOURCE_BUNDLED,
+    UPDATE_SOURCE_ONLINE
+};
+
+/* determine if an update is available which is installed in the
+   user repository.
+
+   If the return value is UPDATE_SOURCE_NONE, then no update is
+   available, otherwise the return value determine from which the
+   repository the update is used.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+UPDATE_SOURCE isUpdateUserExtension(
+    bool bReadOnlyShared,
+    OUString const & userVersion,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion);
+
+/* determine if an update is available which is installed in the
+   shared repository.
+
+   If the return value is UPDATE_SOURCE_NONE, then no update is
+   available, otherwise the return value determine from which the
+   repository the update is used.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+UPDATE_SOURCE isUpdateSharedExtension(
+    bool bReadOnlyShared,
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion);
+
+/* determines the extension with the highest identifier and returns it
+
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+css::uno::Reference< css::deployment::XPackage>
+getExtensionWithHighestVersion(
+    css::uno::Sequence<
+    css::uno::Reference<
+    css::deployment::XPackage> > const & seqExtensionsWithSameId);
+
+
+struct UpdateInfo
+{
+    UpdateInfo( css::uno::Reference< css::deployment::XPackage> const & ext);
+
+    css::uno::Reference<  css::deployment::XPackage> extension;
+    //version of the update
+    OUString version;
+    css::uno::Reference< css::xml::dom::XNode > info;
+};
+
+typedef std::map< OUString, UpdateInfo > UpdateInfoMap;
+
+/*
+  @param extensionList
+  List of extension for which online update information is to be obtained. If NULL, then
+  for update information is obtained for all installed extension. There may be only one extension
+  with a particular identifier contained in the list. If one extension is installed
+  in several repositories, then the one with the highest version must be used, because it contains
+  the more recent URLs for getting the update information (if at all).
+  @param out_errors
+  the first member of the pair is the extension  and the second the exception that was produced
+  when processing the extension.
+
+  @return
+  A map of UpdateInfo instances. If the parameter extensionList was given, then the map contains
+  at only information for those extensions.
+ */
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+UpdateInfoMap getOnlineUpdateInfos(
+    css::uno::Reference< css::uno::XComponentContext> const &xContext,
+    css::uno::Reference< css::deployment::XExtensionManager> const & xExtMgr,
+    css::uno::Reference< css::deployment::XUpdateInformationProvider > const & updateInformation,
+    std::vector< css::uno::Reference< css::deployment::XPackage > > const * extensionList,
+    std::vector< std::pair< css::uno::Reference<
+    css::deployment::XPackage>, css::uno::Any> > & out_errors);
+
+/* returns the highest version from the provided arguments.
+*/
+DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
+OUString getHighestVersion(
+    OUString const & sharedVersion,
+    OUString const & bundledVersion,
+    OUString const & onlineVersion);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */