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diff --git a/configmgr/source/components.hxx b/configmgr/source/components.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 .
+ */
+
+#ifndef INCLUDED_CONFIGMGR_SOURCE_COMPONENTS_HXX
+#define INCLUDED_CONFIGMGR_SOURCE_COMPONENTS_HXX
+
+#include <sal/config.h>
+
+#include <set>
+
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <rtl/ref.hxx>
+#include <o3tl/sorted_vector.hxx>
+
+#include "additions.hxx"
+#include "data.hxx"
+#include "modifications.hxx"
+
+namespace com::sun::star {
+    namespace beans { class XPropertySet; }
+    namespace uno {
+        class Any;
+        class XComponentContext;
+    }
+}
+
+namespace configmgr {
+
+class Broadcaster;
+class Node;
+class Partial;
+class RootAccess;
+
+class Components {
+public:
+    static Components & getSingleton(
+        css::uno::Reference< css::uno::XComponentContext > const & context);
+
+    static bool allLocales(OUString const & locale);
+
+    rtl::Reference< Node > resolvePathRepresentation(
+        OUString const & pathRepresentation,
+        OUString * canonicRepresenation, std::vector<OUString> * path, int * finalizedLayer)
+        const;
+
+    rtl::Reference< Node > getTemplate( OUString const & fullName) const;
+
+    void addRootAccess(rtl::Reference< RootAccess > const & access);
+
+    void removeRootAccess(RootAccess * access);
+
+    void initGlobalBroadcaster(
+        Modifications const & modifications,
+        rtl::Reference< RootAccess > const & exclude,
+        Broadcaster * broadcaster);
+
+    void addModification(std::vector<OUString> const & path);
+
+    void writeModifications();
+
+    void flushModifications();
+        // must be called with configmgr::lock unacquired; must be called before
+        // shutdown if writeModifications has ever been called (probably
+        // indirectly, via removeExtensionXcuFile)
+
+    void insertExtensionXcsFile(bool shared, OUString const & fileUri);
+
+    void insertExtensionXcuFile(
+        bool shared, OUString const & fileUri,
+        Modifications * modifications);
+
+    void removeExtensionXcuFile(
+        OUString const & fileUri, Modifications * modifications);
+
+    void insertModificationXcuFile(
+        OUString const & fileUri,
+        std::set< OUString > const & includedPaths,
+        std::set< OUString > const & excludedPaths,
+        Modifications * modifications);
+
+    css::beans::Optional< css::uno::Any >
+    getExternalValue(OUString const & descriptor);
+
+private:
+    Components(const Components&) = delete;
+    Components& operator=(const Components&) = delete;
+
+    typedef void FileParser(
+        OUString const &, int, Data &, Partial const *, Modifications *,
+        Additions *);
+public:
+    explicit Components(
+        css::uno::Reference< css::uno::XComponentContext > const & context);
+
+    ~Components();
+private:
+
+    void parseFileLeniently(
+        FileParser * parseFile, OUString const & url, int layer,
+        Partial const * partial, Modifications * modifications,
+        Additions * additions);
+
+    void parseFiles(
+        int layer, OUString const & extension, FileParser * parseFile,
+        OUString const & url, bool recursive);
+
+    void parseFileList(
+        int layer, FileParser * parseFile, OUString const & urls,
+        bool recordAdditions);
+
+    void parseXcdFiles(int layer, OUString const & url);
+
+    void parseXcsXcuLayer(int layer, OUString const & url);
+
+    void parseXcsXcuIniLayer(
+        int layer, OUString const & url, bool recordAdditions);
+
+    void parseResLayer(int layer, OUString const & url);
+
+    void parseModificationLayer(int layer, OUString const & url);
+
+    int getExtensionLayer(bool shared) const;
+
+    typedef
+        config_map<
+            css::uno::Reference<
+                css::beans::XPropertySet > >
+        ExternalServices;
+
+    class WriteThread;
+
+    enum class ModificationTarget { None, File, Dconf };
+
+    css::uno::Reference< css::uno::XComponentContext >
+        context_;
+    Data data_;
+    o3tl::sorted_vector< RootAccess * > roots_;
+    ExternalServices externalServices_;
+    rtl::Reference< WriteThread > writeThread_;
+    int sharedExtensionLayer_;
+    int userExtensionLayer_;
+    ModificationTarget modificationTarget_;
+    OUString modificationFileUrl_;
+    std::shared_ptr<osl::Mutex> lock_;
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */