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diff --git a/include/comphelper/SelectionMultiplex.hxx b/include/comphelper/SelectionMultiplex.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_COMPHELPER_SELECTION_MULTIPLEX_HXX
+#define INCLUDED_COMPHELPER_SELECTION_MULTIPLEX_HXX
+
+#include <com/sun/star/view/XSelectionChangeListener.hpp>
+#include <com/sun/star/view/XSelectionSupplier.hpp>
+#include <cppuhelper/implbase1.hxx>
+#include "comphelper/comphelperdllapi.h"
+
+//=========================================================================
+//= selection helper classes
+//=========================================================================
+
+//.........................................................................
+namespace comphelper
+{
+//.........................................................................
+
+    class OSelectionChangeMultiplexer;
+
+    //==================================================================
+    //= OSelectionChangeListener
+    //==================================================================
+    /// simple listener adapter for selections
+    class COMPHELPER_DLLPUBLIC OSelectionChangeListener
+    {
+        friend class OSelectionChangeMultiplexer;
+
+        OSelectionChangeMultiplexer*    m_pAdapter;
+        ::osl::Mutex&                   m_rMutex;
+
+    public:
+        OSelectionChangeListener(::osl::Mutex& _rMutex)
+            : m_pAdapter(NULL), m_rMutex(_rMutex) { }
+        virtual ~OSelectionChangeListener();
+
+        virtual void _selectionChanged( const ::com::sun::star::lang::EventObject& aEvent ) throw (::com::sun::star::uno::RuntimeException) = 0;
+        virtual void _disposing(const ::com::sun::star::lang::EventObject& _rSource) throw( ::com::sun::star::uno::RuntimeException);
+
+    protected:
+        // pseudo-private. Making it private now could break compatibility
+        void    setAdapter( OSelectionChangeMultiplexer* _pAdapter );
+    };
+
+    //==================================================================
+    //= OSelectionChangeMultiplexer
+    //==================================================================
+    /// multiplexer for selection changes
+    class COMPHELPER_DLLPUBLIC OSelectionChangeMultiplexer  :public cppu::WeakImplHelper1< ::com::sun::star::view::XSelectionChangeListener>
+    {
+        friend class OSelectionChangeListener;
+         ::com::sun::star::uno::Reference< ::com::sun::star::view::XSelectionSupplier>  m_xSet;
+        OSelectionChangeListener*                   m_pListener;
+        sal_Int32                                   m_nLockCount;
+        sal_Bool                                    m_bListening        : 1;
+        sal_Bool                                    m_bAutoSetRelease   : 1;
+
+        OSelectionChangeMultiplexer(const OSelectionChangeMultiplexer&);
+        OSelectionChangeMultiplexer& operator=(const OSelectionChangeMultiplexer&);
+    protected:
+        virtual ~OSelectionChangeMultiplexer();
+    public:
+        OSelectionChangeMultiplexer(OSelectionChangeListener* _pListener, const  ::com::sun::star::uno::Reference< ::com::sun::star::view::XSelectionSupplier>& _rxSet, sal_Bool _bAutoReleaseSet = sal_True);
+
+    // XEventListener
+        virtual void SAL_CALL disposing( const  ::com::sun::star::lang::EventObject& Source ) throw( ::com::sun::star::uno::RuntimeException);
+
+    // XSelectionChangeListener
+        virtual void SAL_CALL selectionChanged( const ::com::sun::star::lang::EventObject& aEvent ) throw (::com::sun::star::uno::RuntimeException);
+
+        /// incremental lock
+        void        lock();
+        /// incremental unlock
+        void        unlock();
+        /// get the lock count
+        sal_Int32   locked() const { return m_nLockCount; }
+
+        void dispose();
+    };
+
+//.........................................................................
+}   // namespace comphelper
+//.........................................................................
+
+#endif // INCLUDED_COMPHELPER_SELECTION_MULTIPLEX_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */