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diff --git a/include/sfx2/docstoragemodifylistener.hxx b/include/sfx2/docstoragemodifylistener.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 SFX2_DOCSTORAGEMODIFYLISTENER_HXX
+#define SFX2_DOCSTORAGEMODIFYLISTENER_HXX
+
+#include "sfx2/dllapi.h"
+
+#include <com/sun/star/util/XModifyListener.hpp>
+
+#include <cppuhelper/implbase1.hxx>
+
+
+//........................................................................
+namespace sfx2
+{
+//........................................................................
+
+    //====================================================================
+    //= IModifiableDocument
+    //====================================================================
+    /** callback for the DocumentStorageModifyListener class
+    */
+    class SAL_NO_VTABLE IModifiableDocument
+    {
+    public:
+        /// indicates the root or a sub storage of the document has been modified
+        virtual void storageIsModified() = 0;
+
+    protected:
+        ~IModifiableDocument() {}
+    };
+
+    //====================================================================
+    //= DocumentStorageModifyListener
+    //====================================================================
+    typedef ::cppu::WeakImplHelper1 < ::com::sun::star::util::XModifyListener > DocumentStorageModifyListener_Base;
+
+    class SFX2_DLLPUBLIC DocumentStorageModifyListener : public DocumentStorageModifyListener_Base
+    {
+        IModifiableDocument*    m_pDocument;
+        ::osl::SolarMutex&      m_rMutex;
+
+    public:
+        DocumentStorageModifyListener( IModifiableDocument& _rDocument, ::osl::SolarMutex& _rMutex );
+
+        void dispose();
+
+        // XModifyListener
+        virtual void SAL_CALL modified( const ::com::sun::star::lang::EventObject& aEvent ) throw (::com::sun::star::uno::RuntimeException);
+
+        // XEventListener
+        virtual void SAL_CALL disposing( const ::com::sun::star::lang::EventObject& Source ) throw (::com::sun::star::uno::RuntimeException);
+
+    protected:
+        virtual ~DocumentStorageModifyListener();
+
+    private:
+        DocumentStorageModifyListener();                                                    // never implemented
+        DocumentStorageModifyListener( const DocumentStorageModifyListener& );              // never implemented
+        DocumentStorageModifyListener& operator=( const DocumentStorageModifyListener& );   // never implemented
+    };
+
+//........................................................................
+} // namespace sfx2
+//........................................................................
+
+#endif // SFX2_DOCSTORAGEMODIFYLISTENER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */