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diff --git a/reportdesign/inc/PropertyForward.hxx b/reportdesign/inc/PropertyForward.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_REPORTDESIGN_INC_PROPERTYFORWARD_HXX
+#define INCLUDED_REPORTDESIGN_INC_PROPERTYFORWARD_HXX
+
+#include "dllapi.h"
+#include <com/sun/star/beans/XPropertyChangeListener.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include "RptDef.hxx"
+
+
+namespace rptui
+{
+
+    typedef ::cppu::WeakComponentImplHelper<   css::beans::XPropertyChangeListener
+                                    >   OPropertyForward_Base;
+
+    /** \class OPropertyMediator
+     * \brief This class ensures the communication between two XPropertySet instances.
+     * Identical properties will be set at the other propertyset.
+     * \ingroup reportdesign_source_ui_misc
+     */
+    class REPORTDESIGN_DLLPUBLIC OPropertyMediator final : public ::cppu::BaseMutex
+                            ,public OPropertyForward_Base
+    {
+        TPropertyNamePair                                     m_aNameMap;
+        css::uno::Reference< css::beans::XPropertySet>        m_xSource;
+        css::uno::Reference< css::beans::XPropertySetInfo>    m_xSourceInfo;
+        css::uno::Reference< css::beans::XPropertySet>        m_xDest;
+        css::uno::Reference< css::beans::XPropertySetInfo>    m_xDestInfo;
+        bool                                                  m_bInChange;
+        OPropertyMediator(OPropertyMediator const &) = delete;
+        void operator =(OPropertyMediator const &) = delete;
+
+        virtual ~OPropertyMediator() override;
+
+        /** this function is called upon disposing the component
+        */
+        virtual void SAL_CALL disposing() override;
+    public:
+        OPropertyMediator(const css::uno::Reference< css::beans::XPropertySet>& _xSource
+                        ,const css::uno::Reference< css::beans::XPropertySet>& _xDest
+                        ,const TPropertyNamePair& _aNameMap
+                        ,bool _bReverse = false);
+
+        // css::beans::XPropertyChangeListener
+        virtual void SAL_CALL propertyChange( const css::beans::PropertyChangeEvent& evt ) override;
+
+        // css::lang::XEventListener
+        virtual void SAL_CALL disposing( const css::lang::EventObject& _rSource ) override;
+
+        /** stop the listening mode.
+         */
+        void stopListening();
+
+        /** starts the listening mode again.
+         */
+        void startListening();
+    };
+
+}   // namespace rptui
+
+#endif // INCLUDED_REPORTDESIGN_INC_PROPERTYFORWARD_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */