udoapi: merge sw refactoring with undoapi stuff

11 files changed, 1767 insertions, 28 deletions

diff --git a/framework/inc/framework/iguard.hxx b/framework/inc/framework/iguard.hxx
new file mode 100755
index 000000000000..7c00858b208d
--- /dev/null
+++ b/framework/inc/framework/iguard.hxx
@@ -0,0 +1,69 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef __FRAMEWORK_THREADHELP_IGUARD_H_
+#define __FRAMEWORK_THREADHELP_IGUARD_H_
+
+//_________________________________________________________________________________________________________________
+//  includes
+//_________________________________________________________________________________________________________________
+
+#include <sal/types.h>
+
+//_________________________________________________________________________________________________________________
+//  namespace
+//_________________________________________________________________________________________________________________
+
+namespace framework{
+
+//_________________________________________________________________________________________________________________
+//  declarations
+//_________________________________________________________________________________________________________________
+
+/*-************************************************************************************************************//**
+    @descr          interface for guarding a lock
+*//*-*************************************************************************************************************/
+class SAL_NO_VTABLE IGuard
+{
+    //-------------------------------------------------------------------------------------------------------------
+    //  public methods
+    //-------------------------------------------------------------------------------------------------------------
+    public:
+
+        /** clears the lock. If the guard does not currently hold the lock, nothing happens.
+        */
+        virtual void clear() = 0;
+
+        /** attempts to re-establishes the lock, blocking until the attempt is successful.
+        */
+        virtual void reset() = 0;
+
+};      //  class IGuard
+
+}       //  namespace framework
+
+#endif  //  #ifndef __FRAMEWORK_THREADHELP_IGUARD_H_
diff --git a/framework/inc/threadhelp/imutex.h b/framework/inc/framework/imutex.hxx
index 70784c312b87..5466edc4cf76 100644
--- a/framework/inc/threadhelp/imutex.h
+++ b/framework/inc/framework/imutex.hxx
@@ -32,6 +32,8 @@
 //  includes
 //_________________________________________________________________________________________________________________
 
+#include <sal/types.h>
+
 //_________________________________________________________________________________________________________________
 //  namespace
 //_________________________________________________________________________________________________________________
@@ -45,7 +47,7 @@ namespace framework{
 /*-************************************************************************************************************//**
     @descr          We need this interface to support using of different mutex implementations in a generic way.
 *//*-*************************************************************************************************************/
-class IMutex
+class SAL_NO_VTABLE IMutex
 {
     //-------------------------------------------------------------------------------------------------------------
     //  public methods
diff --git a/framework/inc/helper/documentundoguard.hxx b/framework/inc/helper/documentundoguard.hxx
new file mode 100755
index 000000000000..d5856341e30e
--- /dev/null
+++ b/framework/inc/helper/documentundoguard.hxx
@@ -0,0 +1,68 @@
+/*************************************************************************
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef FRAMEWORK_DOCUMENTUNDOGUARD_HXX
+#define FRAMEWORK_DOCUMENTUNDOGUARD_HXX
+
+/** === begin UNO includes === **/
+#include <com/sun/star/uno/XInterface.hpp>
+/** === end UNO includes === **/
+
+#include <boost/scoped_ptr.hpp>
+
+//......................................................................................................................
+namespace framework
+{
+//......................................................................................................................
+
+    //==================================================================================================================
+    //= DocumentUndoGuard
+    //==================================================================================================================
+    struct DocumentUndoGuard_Data;
+    /** a helper class guarding the Undo manager of a document
+
+        This class guards, within a given scope, the Undo Manager of a document (or another component supporting
+        the XUndoManagerSupplier interface). When entering the scope (i.e. when the <code>DocumentUndoGuard</code>
+        instances is constructed), the current state of the undo contexts of the undo manager is examined.
+        Upon leaving the scope (i.e. when the <code>DocumentUndoGuard</code> is destructed), the guard will execute
+        as many calls to <member scope="com::sun::star::document">XUndoManager::leaveUndoContext</member> as are
+        necessary to restore the manager's initial state.
+    */
+    class DocumentUndoGuard
+    {
+    public:
+        DocumentUndoGuard( const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >& i_undoSupplierComponent );
+        ~DocumentUndoGuard();
+
+    private:
+        ::boost::scoped_ptr< DocumentUndoGuard_Data >   m_pData;
+    };
+
+//......................................................................................................................
+} // namespace framework
+//......................................................................................................................
+
+#endif // FRAMEWORK_DOCUMENTUNDOGUARD_HXX
diff --git a/framework/inc/helper/undomanagerhelper.hxx b/framework/inc/helper/undomanagerhelper.hxx
new file mode 100755
index 000000000000..e72f6fbdc173
--- /dev/null
+++ b/framework/inc/helper/undomanagerhelper.hxx
@@ -0,0 +1,159 @@
+/*************************************************************************
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef FRAMEWORK_UNDOMANAGERHELPER_HXX
+#define FRAMEWORK_UNDOMANAGERHELPER_HXX
+
+#include "framework/iguard.hxx"
+#include "framework/imutex.hxx"
+
+/** === begin UNO includes === **/
+#include <com/sun/star/document/XUndoManager.hpp>
+#include <com/sun/star/util/XModifyListener.hpp>
+/** === end UNO includes === **/
+
+#include <boost/scoped_ptr.hpp>
+
+namespace svl
+{
+    class IUndoManager;
+}
+
+//......................................................................................................................
+namespace framework
+{
+//......................................................................................................................
+
+    //==================================================================================================================
+    //= IMutexGuard
+    //==================================================================================================================
+    class SAL_NO_VTABLE IMutexGuard : public IGuard
+    {
+    public:
+        /** returns the mutex guarded by the instance.
+
+            Even if the guard currently has not a lock on the mutex, this method must succeed.
+        */
+        virtual IMutex& getGuardedMutex() = 0;
+    };
+
+    //==================================================================================================================
+    //= IUndoManagerImplementation
+    //==================================================================================================================
+    class SAL_NO_VTABLE IUndoManagerImplementation
+    {
+    public:
+        /** returns the IUndoManager interface to the actual Undo stack
+
+            @throws com::sun::star::lang::DisposedException
+                when the instance is already disposed, and no IUndoManager can be provided
+
+            @throws com::sun::star::lang::NotInitializedException
+                when the instance is not initialized, yet, and no IUndoManager can be provided
+        */
+        virtual ::svl::IUndoManager&    getImplUndoManager() = 0;
+
+        /** provides access to an UNO interface for the XUndoManager implementation. Used when throwing exceptions.
+        */
+        virtual ::com::sun::star::uno::Reference< ::com::sun::star::document::XUndoManager >
+                                        getThis() = 0;
+    };
+
+    //==================================================================================================================
+    //= UndoManagerHelper
+    //==================================================================================================================
+    class UndoManagerHelper_Impl;
+    /** helper class for implementing an XUndoManager
+
+        Several of the methods of the class take an IMutexGuard instance. It is assumed that this guard has a lock on
+        its mutext at the moment the method is entered. The lock will be released before any notifications to the
+        registered XUndoManagerListeners happen.
+
+        The following locking strategy is used for this mutex:
+        <ul><li>Any notifications to the registered XUndoManagerListeners are after the guard has been cleared. i.e.
+                without the mutex being locked.</p>
+            <li>Any calls into the <code>IUndoManager</code> implementation is made without the mutex being locked.
+                Note that this implies that the <code>IUndoManager</code> implementation must be thread-safe in itself
+                (which is true for the default implementation, SfxUndoManager).</li>
+            <li>An exception to the previous item are the <member>IUndoManager::Undo</member> and
+                <member>IUndoManager::Redo</member> methods: They're called with the given external mutex being
+                locked.</li>
+        </ul>
+
+        The reason for the exception for IUndoManager::Undo and IUndoManager::Redo is that those are expected to
+        modify the actual document which the UndoManager works for. And as long as our documents are not thread-safe,
+        and as long as we do not re-fit <strong>all</strong> existing SfxUndoImplementations to <em>not</em> expect
+        the dreaded SolarMutex being locked when they're called, the above behavior is a compromise between "how it should
+        be" and "how it can realistically be".
+    */
+    class UndoManagerHelper
+    {
+    public:
+        UndoManagerHelper( IUndoManagerImplementation& i_undoManagerImpl );
+        ~UndoManagerHelper();
+
+        // life time control
+        void disposing();
+
+        // XUndoManager equivalents
+        void            enterUndoContext( const ::rtl::OUString& i_title, IMutexGuard& i_instanceLock );
+        void            enterHiddenUndoContext( IMutexGuard& i_instanceLock );
+        void            leaveUndoContext( IMutexGuard& i_instanceLock );
+        void            addUndoAction( const ::com::sun::star::uno::Reference< ::com::sun::star::document::XUndoAction >& i_action, IMutexGuard& i_instanceLock );
+        void            undo( IMutexGuard& i_instanceLock );
+        void            redo( IMutexGuard& i_instanceLock );
+        ::sal_Bool      isUndoPossible() const;
+        ::sal_Bool      isRedoPossible() const;
+        ::rtl::OUString getCurrentUndoActionTitle() const;
+        ::rtl::OUString getCurrentRedoActionTitle() const;
+        ::com::sun::star::uno::Sequence< ::rtl::OUString >
+                        getAllUndoActionTitles() const;
+        ::com::sun::star::uno::Sequence< ::rtl::OUString >
+                        getAllRedoActionTitles() const;
+        void            clear( IMutexGuard& i_instanceLock );
+        void            clearRedo( IMutexGuard& i_instanceLock );
+        void            reset( IMutexGuard& i_instanceLock );
+        void            addUndoManagerListener( const ::com::sun::star::uno::Reference< ::com::sun::star::document::XUndoManagerListener >& i_listener );
+        void            removeUndoManagerListener( const ::com::sun::star::uno::Reference< ::com::sun::star::document::XUndoManagerListener >& i_listener );
+
+        // XLockable, base of XUndoManager, equivalents
+        void            lock();
+        void            unlock();
+        ::sal_Bool      isLocked();
+
+        // XModifyBroadcaster equivalents
+        void            addModifyListener( const ::com::sun::star::uno::Reference< ::com::sun::star::util::XModifyListener >& i_listener );
+        void            removeModifyListener( const ::com::sun::star::uno::Reference< ::com::sun::star::util::XModifyListener >& i_listener );
+
+    private:
+        ::boost::scoped_ptr< UndoManagerHelper_Impl >   m_pImpl;
+    };
+
+//......................................................................................................................
+} // namespace framework
+//......................................................................................................................
+
+#endif // FRAMEWORK_UNDOMANAGERHELPER_HXX
diff --git a/framework/inc/threadhelp/lockhelper.hxx b/framework/inc/threadhelp/lockhelper.hxx
index 5677350b5349..27ad3fa178d6 100644
--- a/framework/inc/threadhelp/lockhelper.hxx
+++ b/framework/inc/threadhelp/lockhelper.hxx
@@ -33,7 +33,7 @@
 //_________________________________________________________________________________________________________________
 
 #include <threadhelp/inoncopyable.h>
-#include <threadhelp/imutex.h>
+#include <framework/imutex.hxx>
 #include <threadhelp/irwlock.h>
 #include <threadhelp/fairrwlock.hxx>
 
diff --git a/framework/inc/threadhelp/resetableguard.hxx b/framework/inc/threadhelp/resetableguard.hxx
index 58830189e052..3b88294a80e3 100644
--- a/framework/inc/threadhelp/resetableguard.hxx
+++ b/framework/inc/threadhelp/resetableguard.hxx
@@ -33,7 +33,7 @@
 //_________________________________________________________________________________________________________________
 
 #include <threadhelp/inoncopyable.h>
-#include <threadhelp/imutex.h>
+#include <framework/imutex.hxx>
 
 //#ifndef __FRAMEWORK_THREADHELP_THREADHELPBASE_HXX_
 //#include <threadhelp/threadhelpbase.hxx>
diff --git a/framework/prj/d.lst b/framework/prj/d.lst
index d3a3d6dd153c..a3c3f382da1e 100644
--- a/framework/prj/d.lst
+++ b/framework/prj/d.lst
@@ -43,6 +43,10 @@ mkdir: %_DEST%\xml%_EXT%\uiconfig\modules\StartModule\statusbar
 ..\inc\interaction\preventduplicateinteraction.hxx %_DEST%\inc%_EXT%\framework\preventduplicateinteraction.hxx
 ..\inc\helper\titlehelper.hxx %_DEST%\inc%_EXT%\framework\titlehelper.hxx
 ..\inc\classes\framelistanalyzer.hxx %_DEST%\inc%_EXT%\framework\framelistanalyzer.hxx
+..\inc\helper\documentundoguard.hxx %_DEST%\inc%_EXT%\framework\documentundoguard.hxx
+..\inc\helper\undomanagerhelper.hxx %_DEST%\inc%_EXT%\framework\undomanagerhelper.hxx
+..\inc\framework\imutex.hxx %_DEST%\inc%_EXT%\framework\imutex.hxx
+..\inc\framework\iguard.hxx %_DEST%\inc%_EXT%\framework\iguard.hxx
 
 ..\uiconfig\startmodule\menubar\*.xml %_DEST%\xml%_EXT%\uiconfig\modules\StartModule\menubar\*.xml
 ..\uiconfig\startmodule\toolbar\*.xml %_DEST%\xml%_EXT%\uiconfig\modules\StartModule\toolbar\*.xml
diff --git a/framework/source/helper/documentundoguard.cxx b/framework/source/helper/documentundoguard.cxx
new file mode 100755
index 000000000000..1227c5afbd93
--- /dev/null
+++ b/framework/source/helper/documentundoguard.cxx
@@ -0,0 +1,271 @@
+/*************************************************************************
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#include "precompiled_framework.hxx"
+
+#include <helper/documentundoguard.hxx>
+
+/** === begin UNO includes === **/
+#include <com/sun/star/document/XUndoManagerSupplier.hpp>
+/** === end UNO includes === **/
+
+#include <cppuhelper/implbase1.hxx>
+#include <rtl/ref.hxx>
+#include <tools/diagnose_ex.h>
+
+//......................................................................................................................
+namespace framework
+{
+//......................................................................................................................
+
+    /** === begin UNO using === **/
+    using ::com::sun::star::uno::Reference;
+    using ::com::sun::star::uno::XInterface;
+    using ::com::sun::star::uno::UNO_QUERY;
+    using ::com::sun::star::uno::UNO_QUERY_THROW;
+    using ::com::sun::star::uno::Exception;
+    using ::com::sun::star::uno::RuntimeException;
+    using ::com::sun::star::uno::Any;
+    using ::com::sun::star::uno::makeAny;
+    using ::com::sun::star::uno::Sequence;
+    using ::com::sun::star::uno::Type;
+    using ::com::sun::star::document::XUndoManagerSupplier;
+    using ::com::sun::star::document::XUndoManager;
+    using ::com::sun::star::document::XUndoManagerListener;
+    using ::com::sun::star::document::UndoManagerEvent;
+    using ::com::sun::star::lang::EventObject;
+    /** === end UNO using === **/
+
+    //==================================================================================================================
+    //= UndoManagerContextListener
+    //==================================================================================================================
+    typedef ::cppu::WeakImplHelper1 <   XUndoManagerListener
+                                    >   UndoManagerContextListener_Base;
+    class UndoManagerContextListener : public UndoManagerContextListener_Base
+    {
+    public:
+        UndoManagerContextListener( const Reference< XUndoManager >& i_undoManager )
+            :m_xUndoManager( i_undoManager, UNO_QUERY_THROW )
+            ,m_nRelativeContextDepth( 0 )
+            ,m_documentDisposed( false )
+        {
+            osl_incrementInterlockedCount( &m_refCount );
+            {
+                m_xUndoManager->addUndoManagerListener( this );
+            }
+            osl_decrementInterlockedCount( &m_refCount );
+        }
+
+        UndoManagerContextListener()
+        {
+        }
+
+        void finish()
+        {
+            OSL_ENSURE( m_nRelativeContextDepth >= 0, "UndoManagerContextListener: more contexts left than entered?" );
+
+            if ( m_documentDisposed )
+                return;
+
+            // work with a copy of m_nRelativeContextDepth, to be independent from possible bugs in the
+            // listener notifications (where it would be decremented with every leaveUndoContext)
+            sal_Int32 nDepth = m_nRelativeContextDepth;
+            while ( nDepth-- > 0 )
+            {
+                m_xUndoManager->leaveUndoContext();
+            }
+            m_xUndoManager->removeUndoManagerListener( this );
+        }
+
+        // XUndoManagerListener
+        virtual void SAL_CALL undoActionAdded( const UndoManagerEvent& i_event ) throw (RuntimeException);
+        virtual void SAL_CALL actionUndone( const UndoManagerEvent& i_event ) throw (RuntimeException);
+        virtual void SAL_CALL actionRedone( const UndoManagerEvent& i_event ) throw (RuntimeException);
+        virtual void SAL_CALL allActionsCleared( const EventObject& i_event ) throw (RuntimeException);
+        virtual void SAL_CALL redoActionsCleared( const EventObject& i_event ) throw (RuntimeException);
+        virtual void SAL_CALL resetAll( const EventObject& i_event ) throw (RuntimeException);
+        virtual void SAL_CALL enteredContext( const UndoManagerEvent& i_event ) throw (RuntimeException);
+        virtual void SAL_CALL enteredHiddenContext( const UndoManagerEvent& i_event ) throw (RuntimeException);
+        virtual void SAL_CALL leftContext( const UndoManagerEvent& i_event ) throw (RuntimeException);
+        virtual void SAL_CALL leftHiddenContext( const UndoManagerEvent& i_event ) throw (RuntimeException);
+        virtual void SAL_CALL cancelledContext( const UndoManagerEvent& i_event ) throw (RuntimeException);
+
+        // XEventListener
+        virtual void SAL_CALL disposing( const EventObject& i_event ) throw (RuntimeException);
+
+    private:
+        Reference< XUndoManager > const m_xUndoManager;
+        oslInterlockedCount             m_nRelativeContextDepth;
+        bool                            m_documentDisposed;
+    };
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::undoActionAdded( const UndoManagerEvent& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        // not interested in
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::actionUndone( const UndoManagerEvent& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        // not interested in
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::actionRedone( const UndoManagerEvent& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        // not interested in
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::allActionsCleared( const EventObject& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        // not interested in
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::redoActionsCleared( const EventObject& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        // not interested in
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::resetAll( const EventObject& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        m_nRelativeContextDepth = 0;
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::enteredContext( const UndoManagerEvent& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        osl_incrementInterlockedCount( &m_nRelativeContextDepth );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::enteredHiddenContext( const UndoManagerEvent& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        osl_incrementInterlockedCount( &m_nRelativeContextDepth );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::leftContext( const UndoManagerEvent& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        osl_decrementInterlockedCount( &m_nRelativeContextDepth );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::leftHiddenContext( const UndoManagerEvent& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        osl_decrementInterlockedCount( &m_nRelativeContextDepth );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::cancelledContext( const UndoManagerEvent& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        osl_decrementInterlockedCount( &m_nRelativeContextDepth );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void SAL_CALL UndoManagerContextListener::disposing( const EventObject& i_event ) throw (RuntimeException)
+    {
+        (void)i_event;
+        m_documentDisposed = true;
+    }
+
+    //==================================================================================================================
+    //= DocumentUndoGuard_Data
+    //==================================================================================================================
+    struct DocumentUndoGuard_Data
+    {
+        Reference< XUndoManager >                       xUndoManager;
+        ::rtl::Reference< UndoManagerContextListener >  pContextListener;
+    };
+
+    namespace
+    {
+        //--------------------------------------------------------------------------------------------------------------
+        void lcl_init( DocumentUndoGuard_Data& i_data, const Reference< XInterface >& i_undoSupplierComponent )
+        {
+            try
+            {
+                Reference< XUndoManagerSupplier > xUndoSupplier( i_undoSupplierComponent, UNO_QUERY );
+                if ( xUndoSupplier.is() )
+                    i_data.xUndoManager.set( xUndoSupplier->getUndoManager(), UNO_QUERY_THROW );
+
+                if ( i_data.xUndoManager.is() )
+                    i_data.pContextListener.set( new UndoManagerContextListener( i_data.xUndoManager ) );
+            }
+            catch( const Exception& )
+            {
+                DBG_UNHANDLED_EXCEPTION();
+            }
+        }
+
+        //--------------------------------------------------------------------------------------------------------------
+        void lcl_restore( DocumentUndoGuard_Data& i_data )
+        {
+            try
+            {
+                if ( i_data.pContextListener.is() )
+                    i_data.pContextListener->finish();
+                i_data.pContextListener.clear();
+            }
+            catch( const Exception& )
+            {
+                DBG_UNHANDLED_EXCEPTION();
+            }
+        }
+    }
+
+    //==================================================================================================================
+    //= DocumentUndoGuard
+    //==================================================================================================================
+    //------------------------------------------------------------------------------------------------------------------
+    DocumentUndoGuard::DocumentUndoGuard( const Reference< XInterface >& i_undoSupplierComponent )
+        :m_pData( new DocumentUndoGuard_Data )
+    {
+        lcl_init( *m_pData, i_undoSupplierComponent );
+    }
+
+    DocumentUndoGuard::~DocumentUndoGuard()
+    {
+        lcl_restore( *m_pData );
+    }
+
+//......................................................................................................................
+} // namespace framework
+//......................................................................................................................
diff --git a/framework/source/helper/makefile.mk b/framework/source/helper/makefile.mk
index ed54c381160c..9199f556ff2d 100644
--- a/framework/source/helper/makefile.mk
+++ b/framework/source/helper/makefile.mk
@@ -24,7 +24,7 @@
 # for a copy of the LGPLv3 License.
 #
 #*************************************************************************
-PRJ=..$/..
+PRJ=../..
 
 PRJNAME=			framework
 TARGET=				fwk_helper
@@ -41,28 +41,30 @@ CDEFS+=-DCOMPMOD_NAMESPACE=framework
 
 # --- Generate -----------------------------------------------------
 
-SLOFILES= 			$(SLO)$/ocomponentaccess.obj					\
-                    $(SLO)$/ocomponentenumeration.obj				\
-                    $(SLO)$/oframes.obj								\
-                    $(SLO)$/statusindicatorfactory.obj				\
-                    $(SLO)$/statusindicator.obj						\
-                    $(SLO)$/imageproducer.obj						\
-                    $(SLO)$/propertysetcontainer.obj				\
-                    $(SLO)$/actiontriggerhelper.obj					\
-                    $(SLO)$/persistentwindowstate.obj				\
-                    $(SLO)$/networkdomain.obj						\
-                    $(SLO)$/acceleratorinfo.obj                     \
-                    $(SLO)$/uielementwrapperbase.obj                \
-                    $(SLO)$/dockingareadefaultacceptor.obj          \
-                    $(SLO)$/uiconfigelementwrapperbase.obj          \
-                    $(SLO)$/shareablemutex.obj                      \
-                    $(SLO)$/vclstatusindicator.obj                  \
-                    $(SLO)$/wakeupthread.obj                        \
-                    $(SLO)$/configimporter.obj                      \
-                    $(SLO)$/tagwindowasmodified.obj                 \
-                    $(SLO)$/titlebarupdate.obj                      \
-                    $(SLO)$/titlehelper.obj                         \
-                    $(SLO)$/mischelper.obj
+SLOFILES= 			$(SLO)/ocomponentaccess.obj             \
+                    $(SLO)/ocomponentenumeration.obj        \
+                    $(SLO)/oframes.obj                      \
+                    $(SLO)/statusindicatorfactory.obj       \
+                    $(SLO)/statusindicator.obj              \
+                    $(SLO)/imageproducer.obj                \
+                    $(SLO)/propertysetcontainer.obj         \
+                    $(SLO)/actiontriggerhelper.obj          \
+                    $(SLO)/persistentwindowstate.obj        \
+                    $(SLO)/networkdomain.obj                \
+                    $(SLO)/acceleratorinfo.obj              \
+                    $(SLO)/uielementwrapperbase.obj         \
+                    $(SLO)/dockingareadefaultacceptor.obj   \
+                    $(SLO)/uiconfigelementwrapperbase.obj   \
+                    $(SLO)/shareablemutex.obj               \
+                    $(SLO)/vclstatusindicator.obj           \
+                    $(SLO)/wakeupthread.obj                 \
+                    $(SLO)/configimporter.obj               \
+                    $(SLO)/tagwindowasmodified.obj          \
+                    $(SLO)/titlebarupdate.obj               \
+                    $(SLO)/titlehelper.obj                  \
+                    $(SLO)/mischelper.obj                   \
+                    $(SLO)/documentundoguard.obj            \
+                    $(SLO)/undomanagerhelper.obj            \
 
 # --- Targets ------------------------------------------------------
 
diff --git a/framework/source/helper/undomanagerhelper.cxx b/framework/source/helper/undomanagerhelper.cxx
new file mode 100755
index 000000000000..e2cfd13c5bb7
--- /dev/null
+++ b/framework/source/helper/undomanagerhelper.cxx
@@ -0,0 +1,1160 @@
+/*************************************************************************
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#include "precompiled_framework.hxx"
+
+#include "helper/undomanagerhelper.hxx"
+
+/** === begin UNO includes === **/
+#include <com/sun/star/lang/XComponent.hpp>
+/** === end UNO includes === **/
+
+#include <cppuhelper/interfacecontainer.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <comphelper/flagguard.hxx>
+#include <comphelper/asyncnotification.hxx>
+#include <svl/undo.hxx>
+#include <tools/diagnose_ex.h>
+#include <osl/conditn.hxx>
+
+#include <stack>
+#include <queue>
+#include <boost/function.hpp>
+
+//......................................................................................................................
+namespace framework
+{
+//......................................................................................................................
+
+    /** === begin UNO using === **/
+    using ::com::sun::star::uno::Reference;
+    using ::com::sun::star::uno::XInterface;
+    using ::com::sun::star::uno::UNO_QUERY;
+    using ::com::sun::star::uno::UNO_QUERY_THROW;
+    using ::com::sun::star::uno::UNO_SET_THROW;
+    using ::com::sun::star::uno::Exception;
+    using ::com::sun::star::uno::RuntimeException;
+    using ::com::sun::star::uno::Any;
+    using ::com::sun::star::uno::makeAny;
+    using ::com::sun::star::uno::Sequence;
+    using ::com::sun::star::uno::Type;
+    using ::com::sun::star::document::XUndoManagerListener;
+    using ::com::sun::star::document::UndoManagerEvent;
+    using ::com::sun::star::document::EmptyUndoStackException;
+    using ::com::sun::star::document::UndoContextNotClosedException;
+    using ::com::sun::star::document::UndoFailedException;
+    using ::com::sun::star::util::NotLockedException;
+    using ::com::sun::star::lang::EventObject;
+    using ::com::sun::star::document::XUndoAction;
+    using ::com::sun::star::lang::XComponent;
+    using ::com::sun::star::document::XUndoManager;
+    using ::com::sun::star::util::InvalidStateException;
+    using ::com::sun::star::lang::IllegalArgumentException;
+    using ::com::sun::star::util::XModifyListener;
+    /** === end UNO using === **/
+    using ::svl::IUndoManager;
+
+    //==================================================================================================================
+    //= UndoActionWrapper
+    //==================================================================================================================
+    class UndoActionWrapper : public SfxUndoAction
+    {
+    public:
+                            UndoActionWrapper(
+                                Reference< XUndoAction > const& i_undoAction
+                            );
+        virtual             ~UndoActionWrapper();
+
+        virtual String      GetComment() const;
+        virtual void        Undo();
+        virtual void        Redo();
+        virtual BOOL        CanRepeat(SfxRepeatTarget&) const;
+
+    private:
+        const Reference< XUndoAction >  m_xUndoAction;
+    };
+
+    //------------------------------------------------------------------------------------------------------------------
+    UndoActionWrapper::UndoActionWrapper( Reference< XUndoAction > const& i_undoAction )
+        :SfxUndoAction()
+        ,m_xUndoAction( i_undoAction )
+    {
+        ENSURE_OR_THROW( m_xUndoAction.is(), "illegal undo action" );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    UndoActionWrapper::~UndoActionWrapper()
+    {
+        try
+        {
+            Reference< XComponent > xComponent( m_xUndoAction, UNO_QUERY );
+            if ( xComponent.is() )
+                xComponent->dispose();
+        }
+        catch( const Exception& )
+        {
+            DBG_UNHANDLED_EXCEPTION();
+        }
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    String UndoActionWrapper::GetComment() const
+    {
+        String sComment;
+        try
+        {
+            sComment = m_xUndoAction->getTitle();
+        }
+        catch( const Exception& )
+        {
+            DBG_UNHANDLED_EXCEPTION();
+        }
+        return sComment;
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoActionWrapper::Undo()
+    {
+        m_xUndoAction->undo();
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoActionWrapper::Redo()
+    {
+        m_xUndoAction->redo();
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    BOOL UndoActionWrapper::CanRepeat(SfxRepeatTarget&) const
+    {
+        return FALSE;
+    }
+
+    //==================================================================================================================
+    //= UndoManagerRequest
+    //==================================================================================================================
+    class UndoManagerRequest : public ::comphelper::AnyEvent
+    {
+    public:
+        UndoManagerRequest( ::boost::function0< void > const& i_request )
+            :m_request( i_request )
+            ,m_caughtException()
+            ,m_finishCondition()
+        {
+            m_finishCondition.reset();
+        }
+
+        void execute()
+        {
+            try
+            {
+                m_request();
+            }
+            catch( const Exception& )
+            {
+                m_caughtException = ::cppu::getCaughtException();
+            }
+            m_finishCondition.set();
+        }
+
+        void wait()
+        {
+            m_finishCondition.wait();
+            if ( m_caughtException.hasValue() )
+                ::cppu::throwException( m_caughtException );
+        }
+
+        void cancel( const Reference< XInterface >& i_context )
+        {
+            m_caughtException <<= RuntimeException(
+                ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "Concurrency error: an ealier operation on the stack failed." ) ),
+                i_context
+            );
+            m_finishCondition.set();
+        }
+
+    protected:
+        ~UndoManagerRequest()
+        {
+        }
+
+    private:
+        ::boost::function0< void >  m_request;
+        Any                         m_caughtException;
+        ::osl::Condition            m_finishCondition;
+    };
+
+    //------------------------------------------------------------------------------------------------------------------
+
+    //==================================================================================================================
+    //= UndoManagerHelper_Impl
+    //==================================================================================================================
+    class UndoManagerHelper_Impl : public SfxUndoListener
+    {
+    private:
+        ::osl::Mutex                        m_aMutex;
+        ::osl::Mutex                        m_aQueueMutex;
+        bool                                m_disposed;
+        bool                                m_bAPIActionRunning;
+        bool                                m_bProcessingEvents;
+        ::cppu::OInterfaceContainerHelper   m_aUndoListeners;
+        ::cppu::OInterfaceContainerHelper   m_aModifyListeners;
+        IUndoManagerImplementation&         m_rUndoManagerImplementation;
+        UndoManagerHelper&                  m_rAntiImpl;
+        ::std::stack< bool >                m_aContextVisibilities;
+#if OSL_DEBUG_LEVEL > 0
+        ::std::stack< bool >                m_aContextAPIFlags;
+#endif
+        ::std::queue< ::rtl::Reference< UndoManagerRequest > >
+                                            m_aEventQueue;
+
+    public:
+        ::osl::Mutex&   getMutex() { return m_aMutex; }
+
+    public:
+        UndoManagerHelper_Impl( UndoManagerHelper& i_antiImpl, IUndoManagerImplementation& i_undoManagerImpl )
+            :m_aMutex()
+            ,m_aQueueMutex()
+            ,m_disposed( false )
+            ,m_bAPIActionRunning( false )
+            ,m_bProcessingEvents( false )
+            ,m_aUndoListeners( m_aMutex )
+            ,m_aModifyListeners( m_aMutex )
+            ,m_rUndoManagerImplementation( i_undoManagerImpl )
+            ,m_rAntiImpl( i_antiImpl )
+        {
+            getUndoManager().AddUndoListener( *this );
+        }
+
+        virtual ~UndoManagerHelper_Impl()
+        {
+        }
+
+        //..............................................................................................................
+        IUndoManager& getUndoManager() const
+        {
+            return m_rUndoManagerImplementation.getImplUndoManager();
+        }
+
+        //..............................................................................................................
+        Reference< XUndoManager > getXUndoManager() const
+        {
+            return m_rUndoManagerImplementation.getThis();
+        }
+
+        // SfxUndoListener
+        virtual void actionUndone( const String& i_actionComment );
+        virtual void actionRedone( const String& i_actionComment );
+        virtual void undoActionAdded( const String& i_actionComment );
+        virtual void cleared();
+        virtual void clearedRedo();
+        virtual void resetAll();
+        virtual void listActionEntered( const String& i_comment );
+        virtual void listActionLeft( const String& i_comment );
+        virtual void listActionLeftAndMerged();
+        virtual void listActionCancelled();
+        virtual void undoManagerDying();
+
+        // public operations
+        void disposing();
+
+        void enterUndoContext( const ::rtl::OUString& i_title, const bool i_hidden, IMutexGuard& i_instanceLock );
+        void leaveUndoContext( IMutexGuard& i_instanceLock );
+        void addUndoAction( const Reference< XUndoAction >& i_action, IMutexGuard& i_instanceLock );
+        void undo( IMutexGuard& i_instanceLock );
+        void redo( IMutexGuard& i_instanceLock );
+        void clear( IMutexGuard& i_instanceLock );
+        void clearRedo( IMutexGuard& i_instanceLock );
+        void reset( IMutexGuard& i_instanceLock );
+
+        void addUndoManagerListener( const Reference< XUndoManagerListener >& i_listener )
+        {
+            m_aUndoListeners.addInterface( i_listener );
+        }
+
+        void removeUndoManagerListener( const Reference< XUndoManagerListener >& i_listener )
+        {
+            m_aUndoListeners.removeInterface( i_listener );
+        }
+
+        void addModifyListener( const Reference< XModifyListener >& i_listener )
+        {
+            m_aModifyListeners.addInterface( i_listener );
+        }
+
+        void removeModifyListener( const Reference< XModifyListener >& i_listener )
+        {
+            m_aModifyListeners.removeInterface( i_listener );
+        }
+
+        UndoManagerEvent
+            buildEvent( ::rtl::OUString const& i_title ) const;
+
+        void impl_notifyModified();
+        void notify(    ::rtl::OUString const& i_title,
+                        void ( SAL_CALL XUndoManagerListener::*i_notificationMethod )( const UndoManagerEvent& )
+                    );
+        void notify( void ( SAL_CALL XUndoManagerListener::*i_notificationMethod )( const UndoManagerEvent& ) )
+        {
+            notify( ::rtl::OUString(), i_notificationMethod );
+        }
+
+        void notify( void ( SAL_CALL XUndoManagerListener::*i_notificationMethod )( const EventObject& ) );
+
+    private:
+        /// adds a function to be called to the request processor's queue
+        void impl_processRequest( ::boost::function0< void > const& i_request, IMutexGuard& i_instanceLock );
+
+        /// impl-versions of the XUndoManager API.
+        void impl_enterUndoContext( const ::rtl::OUString& i_title, const bool i_hidden );
+        void impl_leaveUndoContext();
+        void impl_addUndoAction( const Reference< XUndoAction >& i_action );
+        void impl_doUndoRedo( IMutexGuard& i_externalLock, const bool i_undo );
+        void impl_clear();
+        void impl_clearRedo();
+        void impl_reset();
+    };
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::disposing()
+    {
+        EventObject aEvent;
+        aEvent.Source = getXUndoManager();
+        m_aUndoListeners.disposeAndClear( aEvent );
+        m_aModifyListeners.disposeAndClear( aEvent );
+
+        ::osl::MutexGuard aGuard( m_aMutex );
+
+        getUndoManager().RemoveUndoListener( *this );
+
+        m_disposed = true;
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    UndoManagerEvent UndoManagerHelper_Impl::buildEvent( ::rtl::OUString const& i_title ) const
+    {
+        UndoManagerEvent aEvent;
+        aEvent.Source = getXUndoManager();
+        aEvent.UndoActionTitle = i_title;
+        aEvent.UndoContextDepth = getUndoManager().GetListActionDepth();
+        return aEvent;
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::impl_notifyModified()
+    {
+        const EventObject aEvent( getXUndoManager() );
+        m_aModifyListeners.notifyEach( &XModifyListener::modified, aEvent );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::notify( ::rtl::OUString const& i_title,
+        void ( SAL_CALL XUndoManagerListener::*i_notificationMethod )( const UndoManagerEvent& ) )
+    {
+        const UndoManagerEvent aEvent( buildEvent( i_title ) );
+
+        // TODO: this notification method here is used by UndoManagerHelper_Impl, to multiplex the notifications we
+        // receive from the IUndoManager. Those notitications are sent with a locked SolarMutex, which means
+        // we're doing the multiplexing here with a locked SM, too. Which is Bad (TM).
+        // Fixing this properly would require outsourcing all the notifications into an own thread - which might lead
+        // to problems of its own, since clients might expect synchronous notifications.
+
+        m_aUndoListeners.notifyEach( i_notificationMethod, aEvent );
+        impl_notifyModified();
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::notify( void ( SAL_CALL XUndoManagerListener::*i_notificationMethod )( const EventObject& ) )
+    {
+        const EventObject aEvent( getXUndoManager() );
+
+        // TODO: the same comment as in the other notify, regarding SM locking applies here ...
+
+        m_aUndoListeners.notifyEach( i_notificationMethod, aEvent );
+        impl_notifyModified();
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::enterUndoContext( const ::rtl::OUString& i_title, const bool i_hidden, IMutexGuard& i_instanceLock )
+    {
+        impl_processRequest(
+            ::boost::bind(
+                &UndoManagerHelper_Impl::impl_enterUndoContext,
+                this,
+                ::boost::cref( i_title ),
+                i_hidden
+            ),
+            i_instanceLock
+        );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::leaveUndoContext( IMutexGuard& i_instanceLock )
+    {
+        impl_processRequest(
+            ::boost::bind(
+                &UndoManagerHelper_Impl::impl_leaveUndoContext,
+                this
+            ),
+            i_instanceLock
+        );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::addUndoAction( const Reference< XUndoAction >& i_action, IMutexGuard& i_instanceLock )
+    {
+        if ( !i_action.is() )
+            throw IllegalArgumentException(
+                ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "illegal undo action object" ) ),
+                getXUndoManager(),
+                1
+            );
+
+        impl_processRequest(
+            ::boost::bind(
+                &UndoManagerHelper_Impl::impl_addUndoAction,
+                this,
+                ::boost::ref( i_action )
+            ),
+            i_instanceLock
+        );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::clear( IMutexGuard& i_instanceLock )
+    {
+        impl_processRequest(
+            ::boost::bind(
+                &UndoManagerHelper_Impl::impl_clear,
+                this
+            ),
+            i_instanceLock
+        );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::clearRedo( IMutexGuard& i_instanceLock )
+    {
+        impl_processRequest(
+            ::boost::bind(
+                &UndoManagerHelper_Impl::impl_clearRedo,
+                this
+            ),
+            i_instanceLock
+        );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::reset( IMutexGuard& i_instanceLock )
+    {
+        impl_processRequest(
+            ::boost::bind(
+                &UndoManagerHelper_Impl::impl_reset,
+                this
+            ),
+            i_instanceLock
+        );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::impl_processRequest( ::boost::function0< void > const& i_request, IMutexGuard& i_instanceLock )
+    {
+        // create the request, and add it to our queue
+        ::rtl::Reference< UndoManagerRequest > pRequest( new UndoManagerRequest( i_request ) );
+        {
+            ::osl::MutexGuard aQueueGuard( m_aQueueMutex );
+            m_aEventQueue.push( pRequest );
+        }
+
+        i_instanceLock.clear();
+
+        if ( m_bProcessingEvents )
+        {
+            // another thread is processing the event queue currently => it will also process the event which we just added
+            pRequest->wait();
+            return;
+        }
+
+        m_bProcessingEvents = true;
+        do
+        {
+            pRequest.clear();
+            {
+                ::osl::MutexGuard aQueueGuard( m_aQueueMutex );
+                if ( m_aEventQueue.empty() )
+                {
+                    // reset the flag before releasing the queue mutex, otherwise it's possible that another thread
+                    // could add an event after we release the mutex, but before we reset the flag. If then this other
+                    // thread checks the flag before be reset it, this thread's event would starve.
+                    m_bProcessingEvents = false;
+                    return;
+                }
+                pRequest = m_aEventQueue.front();
+                m_aEventQueue.pop();
+            }
+            try
+            {
+                pRequest->execute();
+                pRequest->wait();
+            }
+            catch( ... )
+            {
+                {
+                    // no chance to process further requests, if the current one failed
+                    // => discard them
+                    ::osl::MutexGuard aQueueGuard( m_aQueueMutex );
+                    while ( !m_aEventQueue.empty() )
+                    {
+                        pRequest = m_aEventQueue.front();
+                        m_aEventQueue.pop();
+                        pRequest->cancel( getXUndoManager() );
+                    }
+                    m_bProcessingEvents = false;
+                }
+                // re-throw the error
+                throw;
+            }
+        }
+        while ( true );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::impl_enterUndoContext( const ::rtl::OUString& i_title, const bool i_hidden )
+    {
+        // SYNCHRONIZED --->
+        ::osl::ClearableMutexGuard aGuard( m_aMutex );
+
+        IUndoManager& rUndoManager = getUndoManager();
+        if ( !rUndoManager.IsUndoEnabled() )
+            // ignore this request if the manager is locked
+            return;
+
+        if ( i_hidden && ( rUndoManager.GetUndoActionCount( IUndoManager::CurrentLevel ) == 0 ) )
+            throw EmptyUndoStackException(
+                ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "can't enter a hidden context without a previous Undo action" ) ),
+                m_rUndoManagerImplementation.getThis()
+            );
+
+        {
+            ::comphelper::FlagGuard aNotificationGuard( m_bAPIActionRunning );
+            rUndoManager.EnterListAction( i_title, ::rtl::OUString() );
+        }
+
+        m_aContextVisibilities.push( i_hidden );
+
+        const UndoManagerEvent aEvent( buildEvent( i_title ) );
+        aGuard.clear();
+        // <--- SYNCHRONIZED
+
+        m_aUndoListeners.notifyEach( i_hidden ? &XUndoManagerListener::enteredHiddenContext : &XUndoManagerListener::enteredContext, aEvent );
+        impl_notifyModified();
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::impl_leaveUndoContext()
+    {
+        // SYNCHRONIZED --->
+        ::osl::ClearableMutexGuard aGuard( m_aMutex );
+
+        IUndoManager& rUndoManager = getUndoManager();
+        if ( !rUndoManager.IsUndoEnabled() )
+            // ignore this request if the manager is locked
+            return;
+
+        if ( !rUndoManager.IsInListAction() )
+            throw InvalidStateException(
+                ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "no active undo context" ) ),
+                getXUndoManager()
+            );
+
+        USHORT nContextElements = 0;
+
+        const bool isHiddenContext = m_aContextVisibilities.top();;
+        m_aContextVisibilities.pop();
+
+        {
+            ::comphelper::FlagGuard aNotificationGuard( m_bAPIActionRunning );
+            if ( isHiddenContext )
+                nContextElements = rUndoManager.LeaveAndMergeListAction();
+            else
+                nContextElements = rUndoManager.LeaveListAction();
+        }
+
+        // prepare notification
+        void ( SAL_CALL XUndoManagerListener::*notificationMethod )( const UndoManagerEvent& ) = NULL;
+
+        UndoManagerEvent aEvent( buildEvent( ::rtl::OUString() ) );
+        if ( nContextElements == 0 )
+        {
+            notificationMethod = &XUndoManagerListener::cancelledContext;
+        }
+        else if ( isHiddenContext )
+        {
+            notificationMethod = &XUndoManagerListener::leftHiddenContext;
+        }
+        else
+        {
+            aEvent.UndoActionTitle = rUndoManager.GetUndoActionComment( 0, IUndoManager::CurrentLevel );
+            notificationMethod = &XUndoManagerListener::leftContext;
+        }
+
+        aGuard.clear();
+        // <--- SYNCHRONIZED
+
+        m_aUndoListeners.notifyEach( notificationMethod, aEvent );
+        impl_notifyModified();
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::impl_doUndoRedo( IMutexGuard& i_externalLock, const bool i_undo )
+    {
+        ::osl::Guard< ::framework::IMutex > aExternalGuard( i_externalLock.getGuardedMutex() );
+            // note that this assumes that the mutex has been released in the thread which added the
+            // Undo/Redo request, so we can successfully acquire it
+
+        // SYNCHRONIZED --->
+        ::osl::ClearableMutexGuard aGuard( m_aMutex );
+
+        IUndoManager& rUndoManager = getUndoManager();
+        if ( rUndoManager.IsInListAction() )
+            throw UndoContextNotClosedException( ::rtl::OUString(), getXUndoManager() );
+
+        const USHORT nElements  =   i_undo
+                                ?   rUndoManager.GetUndoActionCount( IUndoManager::TopLevel )
+                                :   rUndoManager.GetRedoActionCount( IUndoManager::TopLevel );
+        if ( nElements == 0 )
+            throw EmptyUndoStackException( ::rtl::OUString::createFromAscii( "stack is empty" ), getXUndoManager() );
+
+        aGuard.clear();
+        // <--- SYNCHRONIZED
+
+        try
+        {
+            if ( i_undo )
+                rUndoManager.Undo();
+            else
+                rUndoManager.Redo();
+        }
+        catch( const RuntimeException& ) { /* allowed to leave here */ throw; }
+        catch( const UndoFailedException& ) { /* allowed to leave here */ throw; }
+        catch( const Exception& )
+        {
+            // not allowed to leave
+            const Any aError( ::cppu::getCaughtException() );
+            throw UndoFailedException( ::rtl::OUString(), getXUndoManager(), aError );
+        }
+
+        // note that in opposite to all of the other methods, we do *not* have our mutex locked when calling
+        // into the IUndoManager implementation. This ensures that an actual XUndoAction::undo/redo is also
+        // called without our mutex being locked.
+        // As a consequence, we do not set m_bAPIActionRunning here. Instead, our actionUndone/actionRedone methods
+        // *always* multiplex the event to our XUndoManagerListeners, not only when m_bAPIActionRunning is FALSE (This
+        // again is different from all other SfxUndoListener methods).
+        // So, we do not need to do this notification here ourself.
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::impl_addUndoAction( const Reference< XUndoAction >& i_action )
+    {
+        // SYNCHRONIZED --->
+        ::osl::ClearableMutexGuard aGuard( m_aMutex );
+
+        IUndoManager& rUndoManager = getUndoManager();
+        if ( !rUndoManager.IsUndoEnabled() )
+            // ignore the request if the manager is locked
+            return;
+
+        const UndoManagerEvent aEventAdd( buildEvent( i_action->getTitle() ) );
+        const EventObject aEventClear( getXUndoManager() );
+
+        const bool bHadRedoActions = ( rUndoManager.GetRedoActionCount( IUndoManager::CurrentLevel ) > 0 );
+        {
+            ::comphelper::FlagGuard aNotificationGuard( m_bAPIActionRunning );
+            rUndoManager.AddUndoAction( new UndoActionWrapper( i_action ) );
+        }
+        const bool bHasRedoActions = ( rUndoManager.GetRedoActionCount( IUndoManager::CurrentLevel ) > 0 );
+
+        aGuard.clear();
+        // <--- SYNCHRONIZED
+
+        m_aUndoListeners.notifyEach( &XUndoManagerListener::undoActionAdded, aEventAdd );
+        if ( bHadRedoActions && !bHasRedoActions )
+            m_aUndoListeners.notifyEach( &XUndoManagerListener::redoActionsCleared , aEventClear );
+        impl_notifyModified();
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::impl_clear()
+    {
+        // SYNCHRONIZED --->
+        ::osl::ClearableMutexGuard aGuard( m_aMutex );
+
+        IUndoManager& rUndoManager = getUndoManager();
+        if ( rUndoManager.IsInListAction() )
+            throw UndoContextNotClosedException( ::rtl::OUString(), getXUndoManager() );
+
+        {
+            ::comphelper::FlagGuard aNotificationGuard( m_bAPIActionRunning );
+            rUndoManager.Clear();
+        }
+
+        const EventObject aEvent( getXUndoManager() );
+        aGuard.clear();
+        // <--- SYNCHRONIZED
+
+        m_aUndoListeners.notifyEach( &XUndoManagerListener::allActionsCleared, aEvent );
+        impl_notifyModified();
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::impl_clearRedo()
+    {
+        // SYNCHRONIZED --->
+        ::osl::ClearableMutexGuard aGuard( m_aMutex );
+
+        IUndoManager& rUndoManager = getUndoManager();
+        if ( rUndoManager.IsInListAction() )
+            throw UndoContextNotClosedException( ::rtl::OUString(), getXUndoManager() );
+
+        {
+            ::comphelper::FlagGuard aNotificationGuard( m_bAPIActionRunning );
+            rUndoManager.ClearRedo();
+        }
+
+        const EventObject aEvent( getXUndoManager() );
+        aGuard.clear();
+        // <--- SYNCHRONIZED
+
+        m_aUndoListeners.notifyEach( &XUndoManagerListener::redoActionsCleared, aEvent );
+        impl_notifyModified();
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::impl_reset()
+    {
+        // SYNCHRONIZED --->
+        ::osl::ClearableMutexGuard aGuard( m_aMutex );
+
+        IUndoManager& rUndoManager = getUndoManager();
+        {
+            ::comphelper::FlagGuard aNotificationGuard( m_bAPIActionRunning );
+            rUndoManager.Reset();
+        }
+
+        const EventObject aEvent( getXUndoManager() );
+        aGuard.clear();
+        // <--- SYNCHRONIZED
+
+        m_aUndoListeners.notifyEach( &XUndoManagerListener::resetAll, aEvent );
+        impl_notifyModified();
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::actionUndone( const String& i_actionComment )
+    {
+        UndoManagerEvent aEvent;
+        aEvent.Source = getXUndoManager();
+        aEvent.UndoActionTitle = i_actionComment;
+        aEvent.UndoContextDepth = 0;    // Undo can happen on level 0 only
+        m_aUndoListeners.notifyEach( &XUndoManagerListener::actionUndone, aEvent );
+        impl_notifyModified();
+    }
+
+     //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::actionRedone( const String& i_actionComment )
+    {
+        UndoManagerEvent aEvent;
+        aEvent.Source = getXUndoManager();
+        aEvent.UndoActionTitle = i_actionComment;
+        aEvent.UndoContextDepth = 0;    // Redo can happen on level 0 only
+        m_aUndoListeners.notifyEach( &XUndoManagerListener::actionRedone, aEvent );
+        impl_notifyModified();
+    }
+
+     //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::undoActionAdded( const String& i_actionComment )
+    {
+        if ( m_bAPIActionRunning )
+            return;
+
+        notify( i_actionComment, &XUndoManagerListener::undoActionAdded );
+    }
+
+     //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::cleared()
+    {
+        if ( m_bAPIActionRunning )
+            return;
+
+        notify( &XUndoManagerListener::allActionsCleared );
+    }
+
+     //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::clearedRedo()
+    {
+        if ( m_bAPIActionRunning )
+            return;
+
+        notify( &XUndoManagerListener::redoActionsCleared );
+    }
+
+     //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::resetAll()
+    {
+        if ( m_bAPIActionRunning )
+            return;
+
+        notify( &XUndoManagerListener::resetAll );
+    }
+
+     //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::listActionEntered( const String& i_comment )
+    {
+#if OSL_DEBUG_LEVEL > 0
+        m_aContextAPIFlags.push( m_bAPIActionRunning );
+#endif
+
+        if ( m_bAPIActionRunning )
+            return;
+
+        notify( i_comment, &XUndoManagerListener::enteredContext );
+    }
+
+     //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::listActionLeft( const String& i_comment )
+    {
+#if OSL_DEBUG_LEVEL > 0
+        const bool bCurrentContextIsAPIContext = m_aContextAPIFlags.top();
+        m_aContextAPIFlags.pop();
+        OSL_ENSURE( bCurrentContextIsAPIContext == m_bAPIActionRunning, "UndoManagerHelper_Impl::listActionLeft: API and non-API contexts interwoven!" );
+#endif
+
+        if ( m_bAPIActionRunning )
+            return;
+
+        notify( i_comment, &XUndoManagerListener::leftContext );
+    }
+
+     //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::listActionLeftAndMerged()
+    {
+#if OSL_DEBUG_LEVEL > 0
+        const bool bCurrentContextIsAPIContext = m_aContextAPIFlags.top();
+        m_aContextAPIFlags.pop();
+        OSL_ENSURE( bCurrentContextIsAPIContext == m_bAPIActionRunning, "UndoManagerHelper_Impl::listActionLeftAndMerged: API and non-API contexts interwoven!" );
+#endif
+
+        if ( m_bAPIActionRunning )
+            return;
+
+        notify( &XUndoManagerListener::leftHiddenContext );
+    }
+
+     //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::listActionCancelled()
+    {
+#if OSL_DEBUG_LEVEL > 0
+        const bool bCurrentContextIsAPIContext = m_aContextAPIFlags.top();
+        m_aContextAPIFlags.pop();
+        OSL_ENSURE( bCurrentContextIsAPIContext == m_bAPIActionRunning, "UndoManagerHelper_Impl::listActionCancelled: API and non-API contexts interwoven!" );
+#endif
+
+        if ( m_bAPIActionRunning )
+            return;
+
+        notify( &XUndoManagerListener::cancelledContext );
+    }
+
+     //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::undoManagerDying()
+    {
+        // TODO: do we need to care? Or is this the responsibility of our owner?
+    }
+
+    //==================================================================================================================
+    //= UndoManagerHelper
+    //==================================================================================================================
+    //------------------------------------------------------------------------------------------------------------------
+    UndoManagerHelper::UndoManagerHelper( IUndoManagerImplementation& i_undoManagerImpl )
+        :m_pImpl( new UndoManagerHelper_Impl( *this, i_undoManagerImpl ) )
+    {
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    UndoManagerHelper::~UndoManagerHelper()
+    {
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::disposing()
+    {
+        m_pImpl->disposing();
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::enterUndoContext( const ::rtl::OUString& i_title, IMutexGuard& i_instanceLock )
+    {
+        m_pImpl->enterUndoContext( i_title, false, i_instanceLock );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::enterHiddenUndoContext( IMutexGuard& i_instanceLock )
+    {
+        m_pImpl->enterUndoContext( ::rtl::OUString(), true, i_instanceLock );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::leaveUndoContext( IMutexGuard& i_instanceLock )
+    {
+        m_pImpl->leaveUndoContext( i_instanceLock );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::undo( IMutexGuard& i_instanceLock )
+    {
+        impl_processRequest(
+            ::boost::bind(
+                &UndoManagerHelper_Impl::impl_doUndoRedo,
+                this,
+                ::boost::ref( i_instanceLock ),
+                true
+            ),
+            i_instanceLock
+        );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper_Impl::redo( IMutexGuard& i_instanceLock )
+    {
+        impl_processRequest(
+            ::boost::bind(
+                &UndoManagerHelper_Impl::impl_doUndoRedo,
+                this,
+                ::boost::ref( i_instanceLock ),
+                false
+            ),
+            i_instanceLock
+        );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::addUndoAction( const Reference< XUndoAction >& i_action, IMutexGuard& i_instanceLock )
+    {
+        m_pImpl->addUndoAction( i_action, i_instanceLock );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::undo( IMutexGuard& i_instanceLock )
+    {
+        m_pImpl->undo( i_instanceLock );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::redo( IMutexGuard& i_instanceLock )
+    {
+        m_pImpl->redo( i_instanceLock );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    ::sal_Bool UndoManagerHelper::isUndoPossible() const
+    {
+        // SYNCHRONIZED --->
+        ::osl::MutexGuard aGuard( m_pImpl->getMutex() );
+        IUndoManager& rUndoManager = m_pImpl->getUndoManager();
+        if ( rUndoManager.IsInListAction() )
+            return sal_False;
+        return rUndoManager.GetUndoActionCount( IUndoManager::TopLevel ) > 0;
+        // <--- SYNCHRONIZED
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    ::sal_Bool UndoManagerHelper::isRedoPossible() const
+    {
+        // SYNCHRONIZED --->
+        ::osl::MutexGuard aGuard( m_pImpl->getMutex() );
+        const IUndoManager& rUndoManager = m_pImpl->getUndoManager();
+        if ( rUndoManager.IsInListAction() )
+            return sal_False;
+        return rUndoManager.GetRedoActionCount( IUndoManager::TopLevel ) > 0;
+        // <--- SYNCHRONIZED
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    namespace
+    {
+        //..............................................................................................................
+        ::rtl::OUString lcl_getCurrentActionTitle( UndoManagerHelper_Impl& i_impl, const bool i_undo )
+        {
+            // SYNCHRONIZED --->
+            ::osl::MutexGuard aGuard( i_impl.getMutex() );
+
+            const IUndoManager& rUndoManager = i_impl.getUndoManager();
+            const USHORT nActionCount = i_undo
+                                    ?   rUndoManager.GetUndoActionCount( IUndoManager::TopLevel )
+                                    :   rUndoManager.GetRedoActionCount( IUndoManager::TopLevel );
+            if ( nActionCount == 0 )
+                throw EmptyUndoStackException(
+                    i_undo ? ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "no action on the undo stack" ) )
+                           : ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "no action on the redo stack" ) ),
+                    i_impl.getXUndoManager()
+                );
+            return  i_undo
+                ?   rUndoManager.GetUndoActionComment( 0, IUndoManager::TopLevel )
+                :   rUndoManager.GetRedoActionComment( 0, IUndoManager::TopLevel );
+            // <--- SYNCHRONIZED
+        }
+
+        //..............................................................................................................
+        Sequence< ::rtl::OUString > lcl_getAllActionTitles( UndoManagerHelper_Impl& i_impl, const bool i_undo )
+        {
+            // SYNCHRONIZED --->
+            ::osl::MutexGuard aGuard( i_impl.getMutex() );
+
+            const IUndoManager& rUndoManager = i_impl.getUndoManager();
+            const USHORT nCount =   i_undo
+                                ?   rUndoManager.GetUndoActionCount( IUndoManager::TopLevel )
+                                :   rUndoManager.GetRedoActionCount( IUndoManager::TopLevel );
+
+            Sequence< ::rtl::OUString > aTitles( nCount );
+            for ( USHORT i=0; i<nCount; ++i )
+            {
+                aTitles[i] =    i_undo
+                            ?   rUndoManager.GetUndoActionComment( i, IUndoManager::TopLevel )
+                            :   rUndoManager.GetRedoActionComment( i, IUndoManager::TopLevel );
+            }
+            return aTitles;
+            // <--- SYNCHRONIZED
+        }
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    ::rtl::OUString UndoManagerHelper::getCurrentUndoActionTitle() const
+    {
+        return lcl_getCurrentActionTitle( *m_pImpl, true );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    ::rtl::OUString UndoManagerHelper::getCurrentRedoActionTitle() const
+    {
+        return lcl_getCurrentActionTitle( *m_pImpl, false );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    Sequence< ::rtl::OUString > UndoManagerHelper::getAllUndoActionTitles() const
+    {
+        return lcl_getAllActionTitles( *m_pImpl, true );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    Sequence< ::rtl::OUString > UndoManagerHelper::getAllRedoActionTitles() const
+    {
+        return lcl_getAllActionTitles( *m_pImpl, false );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::clear( IMutexGuard& i_instanceLock )
+    {
+        m_pImpl->clear( i_instanceLock );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::clearRedo( IMutexGuard& i_instanceLock )
+    {
+        m_pImpl->clearRedo( i_instanceLock );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::reset( IMutexGuard& i_instanceLock )
+    {
+        m_pImpl->reset( i_instanceLock );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::lock()
+    {
+        // SYNCHRONIZED --->
+        ::osl::MutexGuard aGuard( m_pImpl->getMutex() );
+
+        IUndoManager& rUndoManager = m_pImpl->getUndoManager();
+        rUndoManager.EnableUndo( false );
+        // <--- SYNCHRONIZED
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::unlock()
+    {
+        // SYNCHRONIZED --->
+        ::osl::MutexGuard aGuard( m_pImpl->getMutex() );
+
+        IUndoManager& rUndoManager = m_pImpl->getUndoManager();
+        if ( rUndoManager.IsUndoEnabled() )
+            throw NotLockedException( ::rtl::OUString::createFromAscii( "Undo manager is not locked" ), m_pImpl->getXUndoManager() );
+        rUndoManager.EnableUndo( true );
+        // <--- SYNCHRONIZED
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    ::sal_Bool UndoManagerHelper::isLocked()
+    {
+        // SYNCHRONIZED --->
+        ::osl::MutexGuard aGuard( m_pImpl->getMutex() );
+
+        IUndoManager& rUndoManager = m_pImpl->getUndoManager();
+        return !rUndoManager.IsUndoEnabled();
+        // <--- SYNCHRONIZED
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::addUndoManagerListener( const Reference< XUndoManagerListener >& i_listener )
+    {
+        if ( i_listener.is() )
+            m_pImpl->addUndoManagerListener( i_listener );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::removeUndoManagerListener( const Reference< XUndoManagerListener >& i_listener )
+    {
+        if ( i_listener.is() )
+            m_pImpl->removeUndoManagerListener( i_listener );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::addModifyListener( const Reference< XModifyListener >& i_listener )
+    {
+        if ( i_listener.is() )
+            m_pImpl->addModifyListener( i_listener );
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    void UndoManagerHelper::removeModifyListener( const Reference< XModifyListener >& i_listener )
+    {
+        if ( i_listener.is() )
+            m_pImpl->removeModifyListener( i_listener );
+    }
+
+//......................................................................................................................
+} // namespace framework
+//......................................................................................................................
diff --git a/framework/util/makefile.mk b/framework/util/makefile.mk
index 698ba37d5d3d..8ea615b5b31b 100644
--- a/framework/util/makefile.mk
+++ b/framework/util/makefile.mk
@@ -99,7 +99,9 @@ LIB2OBJFILES=   \
                 $(SLO)$/menuextensionsupplier.obj               \
                 $(SLO)$/preventduplicateinteraction.obj         \
                 $(SLO)$/framelistanalyzer.obj                   \
-                $(SLO)$/titlehelper.obj
+                $(SLO)$/titlehelper.obj                         \
+                $(SLO)$/documentundoguard.obj                   \
+                $(SLO)$/undomanagerhelper.obj                   \
 
 # --- import classes library ---------------------------------------------------
 
@@ -157,7 +159,7 @@ SHL2STDLIBS=    \
                 $(CPPUHELPERLIB)                    \
                 $(CPPULIB)                          \
                 $(VOSLIB)                           \
-                $(SALLIB)
+                $(SALLIB)                           \
 
 SHL2DEF=        $(MISC)$/$(SHL2TARGET).def
 SHL2DEPN=       $(SHL1IMPLIBN) $(SHL1TARGETN)
@@ -427,6 +429,8 @@ $(MISC)$/$(SHL2TARGET).flt: makefile.mk
     @echo WEP>>$@
     @echo m_pLoader>$@
     @echo _TI2>>$@
+    @echo _TI3>>$@
+    @echo _TI8>>$@
     @echo LIBMAIN>>$@
     @echo LibMain>>$@