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diff --git a/extensions/source/bibliography/bibshortcuthandler.hxx b/extensions/source/bibliography/bibshortcuthandler.hxx
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+++ b/extensions/source/bibliography/bibshortcuthandler.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_EXTENSIONS_SOURCE_BIBLIOGRAPHY_BIBSHORTCUTHANDLER_HXX
+#define INCLUDED_EXTENSIONS_SOURCE_BIBLIOGRAPHY_BIBSHORTCUTHANDLER_HXX
+
+#include <vcl/window.hxx>
+#include <vcl/splitwin.hxx>
+
+// additional classes to handle shortcuts
+// code in bibcont.cxx
+
+
+class BibShortCutHandler
+{
+private:
+    VclPtr<vcl::Window>     pBaseClass;     // in cases, where BibShortCutHandler also has to be a window
+
+protected:
+    explicit                BibShortCutHandler( vcl::Window* pBaseClass );
+
+public:
+    virtual                 ~BibShortCutHandler();
+    virtual bool            HandleShortCutKey( const KeyEvent& rKeyEvent ); // returns true, if key was handled
+
+    inline vcl::Window*          GetWindow();
+};
+
+inline BibShortCutHandler::BibShortCutHandler( vcl::Window* _pBaseClass ) : pBaseClass( _pBaseClass )
+{
+}
+
+inline vcl::Window* BibShortCutHandler::GetWindow()
+{
+    return pBaseClass;
+}
+
+class BibWindow : public vcl::Window, public BibShortCutHandler
+{
+public:
+                            BibWindow( vcl::Window* pParent, WinBits nStyle);
+    virtual                 ~BibWindow() override;
+};
+
+class BibSplitWindow : public SplitWindow, public BibShortCutHandler
+{
+public:
+                            BibSplitWindow( vcl::Window* pParent, WinBits nStyle);
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */