source/form/fmundo.cxx

/**************************************************************
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svx.hxx"

#include "fmundo.hxx"
#include "fmpgeimp.hxx"
#include "svx/dbtoolsclient.hxx"
#include "svx/svditer.hxx"
#include "fmobj.hxx"
#include "fmprop.hrc"
#include "svx/fmresids.hrc"
#include "svx/fmglob.hxx"
#include "svx/dialmgr.hxx"
#include "svx/fmmodel.hxx"
#include "svx/fmpage.hxx"

/** === begin UNO includes === **/
#include <com/sun/star/util/XModifyBroadcaster.hpp>
#include <com/sun/star/beans/PropertyAttribute.hpp>
#include <com/sun/star/container/XContainer.hpp>
#include <com/sun/star/container/XContainerListener.hpp>
#include <com/sun/star/script/XEventAttacherManager.hpp>
#include <com/sun/star/form/binding/XBindableValue.hpp>
#include <com/sun/star/form/binding/XListEntrySink.hpp>
#include <com/sun/star/reflection/XInterfaceMethodTypeDescription.hpp>
/** === end UNO includes === **/

#include "svx/fmtools.hxx"
#include <rtl/logfile.hxx>
#include <svl/macitem.hxx>
#include <tools/shl.hxx>
#include <tools/diagnose_ex.h>
#include <sfx2/objsh.hxx>
#include <sfx2/docfile.hxx>
#include <sfx2/app.hxx>
#include <sfx2/sfx.hrc>
#include <sfx2/event.hxx>
#include <osl/mutex.hxx>
#include <vos/mutex.hxx>
#include <comphelper/property.hxx>
#include <comphelper/uno3.hxx>
#include <comphelper/stl_types.hxx>
#include <comphelper/componentcontext.hxx>

using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::awt;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::container;
using namespace ::com::sun::star::script;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::form;
using namespace ::com::sun::star::util;
using namespace ::com::sun::star::reflection;
using namespace ::com::sun::star::form::binding;
using namespace ::svxform;


#include <com/sun/star/script/XScriptListener.hdl>
#include <comphelper/processfactory.hxx>
#include <cppuhelper/implbase1.hxx>

typedef cppu::WeakImplHelper1< XScriptListener > ScriptEventListener_BASE;
class ScriptEventListenerWrapper : public ScriptEventListener_BASE
{
public:
	ScriptEventListenerWrapper( FmFormModel& _rModel) throw ( RuntimeException )
		:m_rModel( _rModel )
		,m_attemptedListenerCreation( false )
	{

	}
    // XEventListener
    virtual void SAL_CALL disposing(const EventObject& ) throw( RuntimeException ){}

    // XScriptListener
    virtual void SAL_CALL firing(const  ScriptEvent& evt) throw(RuntimeException)
	{
		attemptListenerCreation();
		if ( m_vbaListener.is() )
		{
			m_vbaListener->firing( evt );
		}
	}

    virtual Any SAL_CALL approveFiring(const ScriptEvent& evt) throw( com::sun::star::reflection::InvocationTargetException, RuntimeException)
	{
		attemptListenerCreation();
		if ( m_vbaListener.is() )
		{
			return m_vbaListener->approveFiring( evt );
		}
		return Any();
	}

private:
	void attemptListenerCreation()
	{
		if ( m_attemptedListenerCreation )
			return;
		m_attemptedListenerCreation = true;

		try
		{
			::comphelper::ComponentContext const aContext( ::comphelper::getProcessServiceFactory() );
			Reference< XScriptListener > const xScriptListener( aContext.createComponent( "ooo.vba.EventListener" ), UNO_QUERY_THROW );
			Reference< XPropertySet > const xListenerProps( xScriptListener, UNO_QUERY_THROW );
            // SfxObjectShellRef is good here since the model controls the lifetime of the shell
			SfxObjectShellRef const xObjectShell = m_rModel.GetObjectShell();
			ENSURE_OR_THROW( xObjectShell.Is(), "no object shell!" );
			xListenerProps->setPropertyValue( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "Model" ) ), makeAny( xObjectShell->GetModel() ) );

			m_vbaListener = xScriptListener;
		}
		catch( Exception const & )
		{
			DBG_UNHANDLED_EXCEPTION();
		}
	}
    FmFormModel&					m_rModel;
	Reference< XScriptListener >	m_vbaListener;
	bool							m_attemptedListenerCreation;


};

//------------------------------------------------------------------------------
// some helper structs for caching property infos
//------------------------------------------------------------------------------
struct PropertyInfo
{
	sal_Bool	bIsTransientOrReadOnly	: 1;	// the property is transient or read-only, thus we need no undo action for it
	sal_Bool	bIsValueProperty	    : 1;	// the property is the special value property, thus it may be handled
										    // as if it's transient or persistent
};

struct PropertySetInfo
{
	DECLARE_STL_USTRINGACCESS_MAP(PropertyInfo, AllProperties);

	AllProperties	aProps; 				// all properties of this set which we know so far
	sal_Bool			bHasEmptyControlSource; // sal_True -> the set has a DataField property, and the current value is an empty string
											// sal_False -> the set has _no_ such property or it's value isn't empty
};

sal_Bool operator < (const Reference< XPropertySet >& lhs,
				 const Reference< XPropertySet >& rhs)
{
	return lhs.get() < rhs.get();
}

DECLARE_STL_STDKEY_MAP(Reference< XPropertySet >, PropertySetInfo, PropertySetInfoCache);

//------------------------------------------------------------------------------

String static_STR_UNDO_PROPERTY;
//------------------------------------------------------------------------------
DBG_NAME(FmXUndoEnvironment)
//------------------------------------------------------------------------------
FmXUndoEnvironment::FmXUndoEnvironment(FmFormModel& _rModel)
				   :rModel( _rModel )
                   ,m_pPropertySetCache( NULL )
                   ,m_pScriptingEnv( ::svxform::createDefaultFormScriptingEnvironment( _rModel ) )
				   ,m_Locks( 0 )
				   ,bReadOnly( sal_False )
                   ,m_bDisposed( false )
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::FmXUndoEnvironment" );
	DBG_CTOR(FmXUndoEnvironment,NULL);
	try
	{
		m_vbaListener =  new ScriptEventListenerWrapper( _rModel );
	}
	catch( Exception& )
	{
	}
}

//------------------------------------------------------------------------------
FmXUndoEnvironment::~FmXUndoEnvironment()
{
	DBG_DTOR(FmXUndoEnvironment,NULL);
	if ( !m_bDisposed )   // i120746, call FormScriptingEnvironment::dispose to avoid memory leak
		m_pScriptingEnv->dispose();

	if (m_pPropertySetCache)
		delete static_cast<PropertySetInfoCache*>(m_pPropertySetCache);
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::dispose()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::dispose" );
    OSL_ENSURE( !m_bDisposed, "FmXUndoEnvironment::dispose: disposed twice?" );
    if ( !m_bDisposed )
        return;

	Lock();

    sal_uInt16 nCount = rModel.GetPageCount();
	sal_uInt16 i;
	for (i = 0; i < nCount; i++)
	{
        FmFormPage* pPage = PTR_CAST( FmFormPage, rModel.GetPage(i) );
        if ( pPage )
        {
            Reference< XInterface > xForms = pPage->GetForms( false ).get();
            if ( xForms.is() )
		        RemoveElement( xForms );
        }
	}

	nCount = rModel.GetMasterPageCount();
	for (i = 0; i < nCount; i++)
	{
        FmFormPage* pPage = PTR_CAST( FmFormPage, rModel.GetMasterPage(i) );
        if ( pPage )
        {
            Reference< XInterface > xForms = pPage->GetForms( false ).get();
            if ( xForms.is() )
		        RemoveElement( xForms );
        }
	}

    UnLock();

    OSL_PRECOND( rModel.GetObjectShell(), "FmXUndoEnvironment::dispose: no object shell anymore!" );
    if ( rModel.GetObjectShell() )
	    EndListening( *rModel.GetObjectShell() );

	if ( IsListening( rModel ) )
		EndListening( rModel );

    m_pScriptingEnv->dispose();

    m_bDisposed = true;
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::ModeChanged()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::ModeChanged" );
    OSL_PRECOND( rModel.GetObjectShell(), "FmXUndoEnvironment::ModeChanged: no object shell anymore!" );
    if ( !rModel.GetObjectShell() )
        return;

	if (bReadOnly != (rModel.GetObjectShell()->IsReadOnly() || rModel.GetObjectShell()->IsReadOnlyUI()))
	{
		bReadOnly = !bReadOnly;

		sal_uInt16 nCount = rModel.GetPageCount();
		sal_uInt16 i;
		for (i = 0; i < nCount; i++)
		{
            FmFormPage* pPage = PTR_CAST( FmFormPage, rModel.GetPage(i) );
            if ( pPage )
            {
                Reference< XInterface > xForms = pPage->GetForms( false ).get();
                if ( xForms.is() )
                    TogglePropertyListening( xForms );
            }
		}

		nCount = rModel.GetMasterPageCount();
		for (i = 0; i < nCount; i++)
		{
            FmFormPage* pPage = PTR_CAST( FmFormPage, rModel.GetMasterPage(i) );
            if ( pPage )
            {
                Reference< XInterface > xForms = pPage->GetForms( false ).get();
                if ( xForms.is() )
		            TogglePropertyListening( xForms );
            }
		}

		if (!bReadOnly)
			StartListening(rModel);
		else
			EndListening(rModel);
	}
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::Notify( SfxBroadcaster& /*rBC*/, const SfxHint& rHint )
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::Notify" );
	if (rHint.ISA(SdrHint))
	{
		SdrHint* pSdrHint = (SdrHint*)&rHint;
		switch( pSdrHint->GetKind() )
		{
			case HINT_OBJINSERTED:
			{
				SdrObject* pSdrObj = (SdrObject*)pSdrHint->GetObject();
				Inserted( pSdrObj );
			}	break;
			case HINT_OBJREMOVED:
			{
				SdrObject* pSdrObj = (SdrObject*)pSdrHint->GetObject();
				Removed( pSdrObj );
			}
			break;
            default:
                break;
		}
	}
	else if (rHint.ISA(SfxSimpleHint))
	{
		switch ( ((SfxSimpleHint&)rHint).GetId() )
		{
			case SFX_HINT_DYING:
				dispose();
                rModel.SetObjectShell( NULL );
				break;
			case SFX_HINT_MODECHANGED:
				ModeChanged();
				break;
		}
	}
	else if (rHint.ISA(SfxEventHint))
	{
		switch (((SfxEventHint&)rHint).GetEventId())
		{
		case SFX_EVENT_CREATEDOC:
			case SFX_EVENT_OPENDOC:
				ModeChanged();
				break;
		}
	}

}

//------------------------------------------------------------------
void FmXUndoEnvironment::Inserted(SdrObject* pObj)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::Inserted" );
	if (pObj->GetObjInventor() == FmFormInventor)
	{
		FmFormObj* pFormObj = PTR_CAST(FmFormObj, pObj);
		Inserted( pFormObj );
	}
	else if (pObj->IsGroupObject())
	{
		SdrObjListIter aIter(*pObj->GetSubList());
		while ( aIter.IsMore() )
			Inserted( aIter.Next() );
	}
}

//------------------------------------------------------------------------------
namespace
{
    sal_Bool lcl_searchElement(const Reference< XIndexAccess>& xCont, const Reference< XInterface >& xElement)
    {
	    if (!xCont.is() || !xElement.is())
		    return sal_False;

	    sal_Int32 nCount = xCont->getCount();
	    Reference< XInterface > xComp;
	    for (sal_Int32 i = 0; i < nCount; i++)
	    {
		    try
		    {
			    xCont->getByIndex(i) >>= xComp;
			    if (xComp.is())
			    {
				    if ( xElement == xComp )
					    return sal_True;
				    else
				    {
					    Reference< XIndexAccess> xCont2(xComp, UNO_QUERY);
					    if (xCont2.is() && lcl_searchElement(xCont2, xElement))
						    return sal_True;
				    }
			    }
		    }
		    catch(const Exception&)
		    {
                DBG_UNHANDLED_EXCEPTION();
		    }
	    }
	    return sal_False;
    }
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::Inserted(FmFormObj* pObj)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::Inserted" );
	DBG_ASSERT( pObj, "FmXUndoEnvironment::Inserted: invalid object!" );
	if ( !pObj )
		return;

	// ist das Control noch einer Form zugeordnet
	Reference< XInterface >  xModel(pObj->GetUnoControlModel(), UNO_QUERY);
	Reference< XFormComponent >  xContent(xModel, UNO_QUERY);
	if (xContent.is() && pObj->GetPage())
	{
		// if the component doesn't belong to a form, yet, find one to insert into
		if (!xContent->getParent().is())
		{
            try
            {
			    Reference< XIndexContainer > xObjectParent = pObj->GetOriginalParent();

                FmFormPage& rPage = dynamic_cast< FmFormPage& >( *pObj->GetPage() );
			    Reference< XIndexAccess >  xForms( rPage.GetForms(), UNO_QUERY_THROW );

			    Reference< XIndexContainer > xNewParent;
                Reference< XForm >           xForm;
			    sal_Int32 nPos = -1;
			    if ( lcl_searchElement( xForms, xObjectParent ) )
                {
                    // the form which was the parent of the object when it was removed is still
                    // part of the form component hierachy of the current page
				    xNewParent = xObjectParent;
                    xForm.set( xNewParent, UNO_QUERY_THROW );
                    nPos = ::std::min( pObj->GetOriginalIndex(), xNewParent->getCount() );
                }
			    else
			    {
				    xForm.set( rPage.GetImpl().findPlaceInFormComponentHierarchy( xContent ), UNO_SET_THROW );
				    xNewParent.set( xForm, UNO_QUERY_THROW );
                    nPos = xNewParent->getCount();
			    }

                rPage.GetImpl().setUniqueName( xContent, xForm );
			    xNewParent->insertByIndex( nPos, makeAny( xContent ) );

                Reference< XEventAttacherManager >	xManager( xNewParent, UNO_QUERY_THROW );
			    xManager->registerScriptEvents( nPos, pObj->GetOriginalEvents() );
            }
            catch( const Exception& )
            {
            	DBG_UNHANDLED_EXCEPTION();
            }
		}

		// FormObject zuruecksetzen
		pObj->ClearObjEnv();
	}
}

//------------------------------------------------------------------
void FmXUndoEnvironment::Removed(SdrObject* pObj)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::Removed" );
    if ( pObj->IsVirtualObj() )
        // for virtual objects, we've already been notified of the removal of the master
        // object, which is sufficient here
        return;

	if (pObj->GetObjInventor() == FmFormInventor)
	{
		FmFormObj* pFormObj = PTR_CAST(FmFormObj, pObj);
		Removed(pFormObj);
	}
	else if (pObj->IsGroupObject())
	{
		SdrObjListIter aIter(*pObj->GetSubList());
		while ( aIter.IsMore() )
			Removed( aIter.Next() );
	}
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::Removed(FmFormObj* pObj)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::Removed" );
	DBG_ASSERT( pObj, "FmXUndoEnvironment::Removed: invalid object!" );
	if ( !pObj )
		return;

	// ist das Control noch einer Form zugeordnet
	Reference< XFormComponent >  xContent(pObj->GetUnoControlModel(), UNO_QUERY);
	if (xContent.is())
	{
		// das Object wird aus einer Liste herausgenommen
		// existiert ein Vater wird das Object beim beim Vater entfernt und
		// am FormObject gemerkt!

		// wird das Object wieder eingefuegt und ein Parent existiert, so wird dieser
		// Parent wiederum gesetzt
		Reference< XIndexContainer >  xForm(xContent->getParent(), UNO_QUERY);
		if (xForm.is())
		{
			Reference< XIndexAccess >  xIndexAccess((XIndexContainer*)xForm.get());
			// Feststellen an welcher Position sich das Kind befunden hat
			const sal_Int32 nPos = getElementPos(xIndexAccess, xContent);
			if (nPos >= 0)
			{
				Sequence< ScriptEventDescriptor > aEvts;
				Reference< XEventAttacherManager >	xManager(xForm, UNO_QUERY);
				if (xManager.is())
					aEvts = xManager->getScriptEvents(nPos);

				try
				{
					pObj->SetObjEnv(xForm, nPos, aEvts);
					xForm->removeByIndex(nPos);
				}
				catch(Exception&)
				{
                    DBG_UNHANDLED_EXCEPTION();
				}

			}
		}
	}
}

//	XEventListener
//------------------------------------------------------------------------------
void SAL_CALL FmXUndoEnvironment::disposing(const EventObject& e) throw( RuntimeException )
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::disposing" );
	// check if it's an object we have cached informations about
	if (m_pPropertySetCache)
	{
		Reference< XPropertySet > xSourceSet(e.Source, UNO_QUERY);
		if (xSourceSet.is())
		{
			PropertySetInfoCache* pCache = static_cast<PropertySetInfoCache*>(m_pPropertySetCache);
			PropertySetInfoCacheIterator aSetPos = pCache->find(xSourceSet);
			if (aSetPos != pCache->end())
				pCache->erase(aSetPos);
		}
	}
}

// XPropertyChangeListener
//------------------------------------------------------------------------------
void SAL_CALL FmXUndoEnvironment::propertyChange(const PropertyChangeEvent& evt) throw(::com::sun::star::uno::RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::propertyChange" );
    ::osl::ClearableMutexGuard aGuard( m_aMutex );

	if (!IsLocked())
	{
		Reference< XPropertySet >  xSet(evt.Source, UNO_QUERY);
		if (!xSet.is())
			return;

		// if it's a "default value" property of a control model, set the according "value" property
		static ::rtl::OUString pDefaultValueProperties[] = {
			FM_PROP_DEFAULT_TEXT, FM_PROP_DEFAULTCHECKED, FM_PROP_DEFAULT_DATE, FM_PROP_DEFAULT_TIME,
			FM_PROP_DEFAULT_VALUE, FM_PROP_DEFAULT_SELECT_SEQ, FM_PROP_EFFECTIVE_DEFAULT
		};
		const ::rtl::OUString aValueProperties[] = {
			FM_PROP_TEXT, FM_PROP_STATE, FM_PROP_DATE, FM_PROP_TIME,
			FM_PROP_VALUE, FM_PROP_SELECT_SEQ, FM_PROP_EFFECTIVE_VALUE
		};
		sal_Int32 nDefaultValueProps = sizeof(pDefaultValueProperties)/sizeof(pDefaultValueProperties[0]);
		OSL_ENSURE(sizeof(aValueProperties)/sizeof(aValueProperties[0]) == nDefaultValueProps,
			"FmXUndoEnvironment::propertyChange: inconsistence!");
		for (sal_Int32 i=0; i<nDefaultValueProps; ++i)
		{
			if (0 == evt.PropertyName.compareTo(pDefaultValueProperties[i]))
			{
				try
				{
					xSet->setPropertyValue(aValueProperties[i], evt.NewValue);
				}
				catch(const Exception&)
				{
					OSL_ENSURE(sal_False, "FmXUndoEnvironment::propertyChange: could not adjust the value property!");
				}
			}
		}

		// no Undo for transient and readonly props. But unfortunately "transient" is not only that the
		// "transient" flag is set for the property in question, instead is is somewhat more complex
        // Transience criterions are:
        // - the "transient" flag is set for the property
        // - OR the control has a non-empty COntrolSource property, i.e. is intended to be bound
        //   to a database column. Note that it doesn't matter here whether the control actually
        //   *is* bound to a column
        // - OR the control is bound to an external value via XBindableValue/XValueBinding
        //   which does not have a "ExternalData" property being <TRUE/>

		if (!m_pPropertySetCache)
			m_pPropertySetCache = new PropertySetInfoCache;
		PropertySetInfoCache* pCache = static_cast<PropertySetInfoCache*>(m_pPropertySetCache);

		// let's see if we know something about the set
		PropertySetInfoCacheIterator aSetPos = pCache->find(xSet);
		if (aSetPos == pCache->end())
		{
			PropertySetInfo aNewEntry;
			if (!::comphelper::hasProperty(FM_PROP_CONTROLSOURCE, xSet))
			{
				aNewEntry.bHasEmptyControlSource = sal_False;
			}
			else
			{
				try
				{
					Any aCurrentControlSource = xSet->getPropertyValue(FM_PROP_CONTROLSOURCE);
					aNewEntry.bHasEmptyControlSource = !aCurrentControlSource.hasValue() || (::comphelper::getString(aCurrentControlSource).getLength() == 0);
				}
				catch(const Exception&)
				{
                    DBG_UNHANDLED_EXCEPTION();
				}
			}
			aSetPos = pCache->insert(PropertySetInfoCache::value_type(xSet,aNewEntry)).first;
			DBG_ASSERT(aSetPos != pCache->end(), "FmXUndoEnvironment::propertyChange : just inserted it ... why it's not there ?");
		}
		else
		{	// is it the DataField property ?
			if (evt.PropertyName.equals(FM_PROP_CONTROLSOURCE))
			{
				aSetPos->second.bHasEmptyControlSource = !evt.NewValue.hasValue() || (::comphelper::getString(evt.NewValue).getLength() == 0);
			}
		}

		// now we have access to the cached info about the set
		// let's see what we know about the property
		PropertySetInfo::AllProperties& rPropInfos = aSetPos->second.aProps;
		PropertySetInfo::AllPropertiesIterator aPropertyPos = rPropInfos.find(evt.PropertyName);
		if (aPropertyPos == rPropInfos.end())
		{	// nothing 'til now ... have to change this ....
			PropertyInfo aNewEntry;

			// the attributes
			sal_Int32 nAttributes = xSet->getPropertySetInfo()->getPropertyByName(evt.PropertyName).Attributes;
			aNewEntry.bIsTransientOrReadOnly = ((nAttributes & PropertyAttribute::READONLY) != 0) || ((nAttributes & PropertyAttribute::TRANSIENT) != 0);

			// check if it is the special "DataFieldProperty"
			aNewEntry.bIsValueProperty = sal_False;
			try
			{
				if (::comphelper::hasProperty(FM_PROP_CONTROLSOURCEPROPERTY, xSet))
				{
					Any aControlSourceProperty = xSet->getPropertyValue(FM_PROP_CONTROLSOURCEPROPERTY);
					::rtl::OUString sControlSourceProperty;
					aControlSourceProperty >>= sControlSourceProperty;

					aNewEntry.bIsValueProperty = (sControlSourceProperty.equals(evt.PropertyName));
				}
			}
			catch(const Exception&)
			{
                DBG_UNHANDLED_EXCEPTION();
			}

			// insert the new entry
			aPropertyPos = rPropInfos.insert(PropertySetInfo::AllProperties::value_type(evt.PropertyName,aNewEntry)).first;
			DBG_ASSERT(aPropertyPos != rPropInfos.end(), "FmXUndoEnvironment::propertyChange : just inserted it ... why it's not there ?");
		}

		// now we have access to the cached info about the property affected
		// and are able to decide wether or not we need an undo action

        bool bAddUndoAction = rModel.IsUndoEnabled();
        // no UNDO for transient/readonly properties
        if ( bAddUndoAction && aPropertyPos->second.bIsTransientOrReadOnly )
            bAddUndoAction = false;

		if ( bAddUndoAction && aPropertyPos->second.bIsValueProperty )
		{
            // no UNDO when the "value" property changes, but the ControlSource is non-empty
            // (in this case the control is intended to be bound to a database column)
            if ( !aSetPos->second.bHasEmptyControlSource )
                bAddUndoAction = false;

            // no UNDO if the control is currently bound to an external value
            if ( bAddUndoAction )
            {
                Reference< XBindableValue > xBindable( evt.Source, UNO_QUERY );
                Reference< XValueBinding > xBinding;
                if ( xBindable.is() )
                    xBinding = xBindable->getValueBinding();

                Reference< XPropertySet > xBindingProps;
                Reference< XPropertySetInfo > xBindingPropsPSI;
                if ( xBindable.is() )
                    xBindingProps.set( xBinding, UNO_QUERY );
                if ( xBindingProps.is() )
                    xBindingPropsPSI = xBindingProps->getPropertySetInfo();
                // TODO: we should cache all those things, else this might be too expensive.
                // However, this requires we're notified of changes in the value binding

                static const ::rtl::OUString s_sExternalData( RTL_CONSTASCII_USTRINGPARAM( "ExternalData" ) );
                if ( xBindingPropsPSI.is() && xBindingPropsPSI->hasPropertyByName( s_sExternalData ) )
                {
                    sal_Bool bExternalData = sal_True;
                    OSL_VERIFY( xBindingProps->getPropertyValue( s_sExternalData ) >>= bExternalData );
                    bAddUndoAction = !bExternalData;
                }
                else
                    bAddUndoAction = !xBinding.is();
            }
        }

        if ( bAddUndoAction && ( evt.PropertyName == FM_PROP_STRINGITEMLIST ) )
        {
            Reference< XListEntrySink > xSink( evt.Source, UNO_QUERY );
            if ( xSink.is() && xSink->getListEntrySource().is() )
                // #i41029# / 2005-01-31 / frank.schoenheit@sun.com
                bAddUndoAction = false;
        }

        if ( bAddUndoAction )
        {
            aGuard.clear();
            // TODO: this is a potential race condition: two threads here could in theory
            // add their undo actions out-of-order

            ::vos::OClearableGuard aSolarGuard( Application::GetSolarMutex() );
            rModel.AddUndo(new FmUndoPropertyAction(rModel, evt));
        }
	}
	else
	{
		// if it's the DataField property we may have to adjust our cache
		if (m_pPropertySetCache && evt.PropertyName.equals(FM_PROP_CONTROLSOURCE))
		{
			Reference< XPropertySet >  xSet(evt.Source, UNO_QUERY);
			PropertySetInfoCache* pCache = static_cast<PropertySetInfoCache*>(m_pPropertySetCache);
			PropertySetInfo& rSetInfo = (*pCache)[xSet];
			rSetInfo.bHasEmptyControlSource = !evt.NewValue.hasValue() || (::comphelper::getString(evt.NewValue).getLength() == 0);
		}
	}
}

// XContainerListener
//------------------------------------------------------------------------------
void SAL_CALL FmXUndoEnvironment::elementInserted(const ContainerEvent& evt) throw(::com::sun::star::uno::RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::elementInserted" );
	::vos::OClearableGuard aSolarGuard( Application::GetSolarMutex() );
    ::osl::MutexGuard aGuard( m_aMutex );

	// neues Object zum lauschen
	Reference< XInterface >  xIface;
	evt.Element >>= xIface;
	OSL_ENSURE(xIface.is(), "FmXUndoEnvironment::elementInserted: invalid container notification!");
	AddElement(xIface);

    implSetModified();
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::implSetModified()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::implSetModified" );
	if ( !IsLocked() && rModel.GetObjectShell() )
	{
		rModel.GetObjectShell()->SetModified( sal_True );
	}
}

//------------------------------------------------------------------------------
void SAL_CALL FmXUndoEnvironment::elementReplaced(const ContainerEvent& evt) throw(::com::sun::star::uno::RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::elementReplaced" );
	::vos::OClearableGuard aSolarGuard( Application::GetSolarMutex() );
    ::osl::MutexGuard aGuard( m_aMutex );

    Reference< XInterface >  xIface;
	evt.ReplacedElement >>= xIface;
	OSL_ENSURE(xIface.is(), "FmXUndoEnvironment::elementReplaced: invalid container notification!");
	RemoveElement(xIface);

	evt.Element >>= xIface;
	AddElement(xIface);

    implSetModified();
}

//------------------------------------------------------------------------------
void SAL_CALL FmXUndoEnvironment::elementRemoved(const ContainerEvent& evt) throw(::com::sun::star::uno::RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::elementRemoved" );
	::vos::OClearableGuard aSolarGuard( Application::GetSolarMutex() );
    ::osl::MutexGuard aGuard( m_aMutex );

    Reference< XInterface >  xIface( evt.Element, UNO_QUERY );
	OSL_ENSURE(xIface.is(), "FmXUndoEnvironment::elementRemoved: invalid container notification!");
	RemoveElement(xIface);

    implSetModified();
}

//------------------------------------------------------------------------------
void SAL_CALL FmXUndoEnvironment::modified( const EventObject& /*aEvent*/ ) throw (RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::modified" );
    implSetModified();
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::AddForms(const Reference< XNameContainer > & rForms)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::AddForms" );
	Lock();
	Reference< XInterface >  xInt(rForms, UNO_QUERY);
	AddElement(xInt);
	UnLock();
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::RemoveForms(const Reference< XNameContainer > & rForms)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::RemoveForms" );
	Lock();
	Reference< XInterface >  xInt(rForms, UNO_QUERY);
	RemoveElement(xInt);
	UnLock();
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::TogglePropertyListening(const Reference< XInterface > & Element)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::TogglePropertyListening" );
	// am Container horchen
	Reference< XIndexContainer >  xContainer(Element, UNO_QUERY);
	if (xContainer.is())
	{
		sal_uInt32 nCount = xContainer->getCount();
		Reference< XInterface >  xIface;
		for (sal_uInt32 i = 0; i < nCount; i++)
		{
			xContainer->getByIndex(i) >>= xIface;
			TogglePropertyListening(xIface);
		}
	}

	Reference< XPropertySet >  xSet(Element, UNO_QUERY);
	if (xSet.is())
	{
		if (!bReadOnly)
			xSet->addPropertyChangeListener( ::rtl::OUString(), this );
		else
			xSet->removePropertyChangeListener( ::rtl::OUString(), this );
	}
}


//------------------------------------------------------------------------------
void FmXUndoEnvironment::switchListening( const Reference< XIndexContainer >& _rxContainer, bool _bStartListening ) SAL_THROW(())
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::switchListening" );
    OSL_PRECOND( _rxContainer.is(), "FmXUndoEnvironment::switchListening: invalid container!" );
    if ( !_rxContainer.is() )
        return;

    try
    {
	    // if it's an EventAttacherManager, then we need to listen for
        // script events
	    Reference< XEventAttacherManager > xManager( _rxContainer, UNO_QUERY );
	    if ( xManager.is() )
	    {
            if ( _bStartListening )
            {
		        m_pScriptingEnv->registerEventAttacherManager( xManager );
                if ( m_vbaListener.is() )
                    xManager->addScriptListener( m_vbaListener );
            }
            else
            {
		        m_pScriptingEnv->revokeEventAttacherManager( xManager );
                if ( m_vbaListener.is() )
                    xManager->removeScriptListener( m_vbaListener );
            }
		}

        // also handle all children of this element
	    sal_uInt32 nCount = _rxContainer->getCount();
	    Reference< XInterface > xInterface;
	    for ( sal_uInt32 i = 0; i < nCount; ++i )
	    {
		    _rxContainer->getByIndex( i ) >>= xInterface;
            if ( _bStartListening )
		        AddElement( xInterface );
            else
		        RemoveElement( xInterface );
	    }

        // be notified of any changes in the container elements
	    Reference< XContainer > xSimpleContainer( _rxContainer, UNO_QUERY );
        OSL_ENSURE( xSimpleContainer.is(), "FmXUndoEnvironment::switchListening: how are we expected to be notified of changes in the container?" );
	    if ( xSimpleContainer.is() )
	    {
            if ( _bStartListening )
		        xSimpleContainer->addContainerListener( this );
            else
		        xSimpleContainer->removeContainerListener( this );
	    }
    }
    catch( const Exception& )
    {
    	OSL_ENSURE( sal_False, "FmXUndoEnvironment::switchListening: caught an exception!" );
    }
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::switchListening( const Reference< XInterface >& _rxObject, bool _bStartListening ) SAL_THROW(())
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::switchListening" );
    OSL_PRECOND( _rxObject.is(), "FmXUndoEnvironment::switchListening: how should I listen at a NULL object?" );

    try
    {
        if ( !bReadOnly )
        {
            Reference< XPropertySet > xProps( _rxObject, UNO_QUERY );
	        if ( xProps.is() )
	        {
                if ( _bStartListening )
    		        xProps->addPropertyChangeListener( ::rtl::OUString(), this );
                else
    	    	    xProps->removePropertyChangeListener( ::rtl::OUString(), this );
	        }
        }

        Reference< XModifyBroadcaster > xBroadcaster( _rxObject, UNO_QUERY );
        if ( xBroadcaster.is() )
        {
            if ( _bStartListening )
                xBroadcaster->addModifyListener( this );
            else
                xBroadcaster->removeModifyListener( this );
        }
    }
    catch( const Exception& )
    {
    	OSL_ENSURE( sal_False, "FmXUndoEnvironment::switchListening: caught an exception!" );
    }
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::AddElement(const Reference< XInterface >& _rxElement )
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::AddElement" );
    OSL_ENSURE( !m_bDisposed, "FmXUndoEnvironment::AddElement: not when I'm already disposed!" );

    // am Container horchen
	Reference< XIndexContainer > xContainer( _rxElement, UNO_QUERY );
	if ( xContainer.is() )
        switchListening( xContainer, true );

    switchListening( _rxElement, true );
}

//------------------------------------------------------------------------------
void FmXUndoEnvironment::RemoveElement(const Reference< XInterface >& _rxElement)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmXUndoEnvironment::RemoveElement" );
    if ( m_bDisposed )
        return;

    switchListening( _rxElement, false );

	if (!bReadOnly)
    {
		// reset the ActiveConnection if the form is to be removed. This will (should) free the resources
		// associated with this connection
		// 86299 - 05/02/2001 - frank.schoenheit@germany.sun.com
        Reference< XForm > xForm( _rxElement, UNO_QUERY );
        Reference< XPropertySet > xFormProperties( xForm, UNO_QUERY );
		if ( xFormProperties.is() )
            if ( !::svxform::OStaticDataAccessTools().isEmbeddedInDatabase( _rxElement ) )
                // (if there is a connection in the context of the component, setting
                // a new connection would be vetoed, anyway)
                // #i34196# - 2004-09-21 - fs@openoffice.org
			    xFormProperties->setPropertyValue( FM_PROP_ACTIVE_CONNECTION, Any() );
	}

	Reference< XIndexContainer > xContainer( _rxElement, UNO_QUERY );
    if ( xContainer.is() )
        switchListening( xContainer, false );
}


//------------------------------------------------------------------------------
FmUndoPropertyAction::FmUndoPropertyAction(FmFormModel& rNewMod, const PropertyChangeEvent& evt)
					 :SdrUndoAction(rNewMod)
					 ,xObj(evt.Source, UNO_QUERY)
					 ,aPropertyName(evt.PropertyName)
					 ,aNewValue(evt.NewValue)
					 ,aOldValue(evt.OldValue)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoPropertyAction::FmUndoPropertyAction" );
	if (rNewMod.GetObjectShell())
		rNewMod.GetObjectShell()->SetModified(sal_True);
	if(static_STR_UNDO_PROPERTY.Len() == 0)
		static_STR_UNDO_PROPERTY = SVX_RES(RID_STR_UNDO_PROPERTY);
}


//------------------------------------------------------------------------------
void FmUndoPropertyAction::Undo()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoPropertyAction::Undo" );
	FmXUndoEnvironment& rEnv = ((FmFormModel&)rMod).GetUndoEnv();

	if (xObj.is() && !rEnv.IsLocked())
	{
		rEnv.Lock();
        try
        {
		    xObj->setPropertyValue( aPropertyName, aOldValue );
        }
        catch( const Exception& )
        {
        	OSL_ENSURE( sal_False, "FmUndoPropertyAction::Undo: caught an exception!" );
        }
		rEnv.UnLock();
	}
}

//------------------------------------------------------------------------------
void FmUndoPropertyAction::Redo()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoPropertyAction::Redo" );
	FmXUndoEnvironment& rEnv = ((FmFormModel&)rMod).GetUndoEnv();

	if (xObj.is() && !rEnv.IsLocked())
	{
		rEnv.Lock();
        try
        {
		    xObj->setPropertyValue( aPropertyName, aNewValue );
        }
        catch( const Exception& )
        {
        	OSL_ENSURE( sal_False, "FmUndoPropertyAction::Redo: caught an exception!" );
        }
		rEnv.UnLock();
	}
}

//------------------------------------------------------------------------------
String FmUndoPropertyAction::GetComment() const
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoPropertyAction::GetComment" );
	String aStr(static_STR_UNDO_PROPERTY);

	aStr.SearchAndReplace( '#', aPropertyName );
	return aStr;
}


DBG_NAME(FmUndoContainerAction);
//------------------------------------------------------------------------------
FmUndoContainerAction::FmUndoContainerAction(FmFormModel& _rMod,
											 Action _eAction,
											 const Reference< XIndexContainer > & xCont,
											 const Reference< XInterface > & xElem,
											 sal_Int32 nIdx)
					  :SdrUndoAction( _rMod )
					  ,m_xContainer( xCont )
					  ,m_nIndex( nIdx )
					  ,m_eAction( _eAction )
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoContainerAction::FmUndoContainerAction" );
    OSL_ENSURE( nIdx >= 0, "FmUndoContainerAction::FmUndoContainerAction: invalid index!" );
        // some old code suggested this could be a valid argument. However, this code was
        // buggy, and it *seemed* that nobody used it - so it was removed.

	DBG_CTOR(FmUndoContainerAction,NULL);
	if ( xCont.is() && xElem.is() )
	{
		// normalize
        m_xElement = m_xElement.query( xElem );
        if ( m_eAction == Removed )
        {
			if (m_nIndex >= 0)
			{
				Reference< XEventAttacherManager >	xManager( xCont, UNO_QUERY );
				if ( xManager.is() )
					m_aEvents = xManager->getScriptEvents(m_nIndex);
			}
			else
				m_xElement = NULL;

            // we now own the element
			m_xOwnElement = m_xElement;
        }
	}
}

//------------------------------------------------------------------------------
FmUndoContainerAction::~FmUndoContainerAction()
{
    // if we own the object ....
	DisposeElement( m_xOwnElement );
	DBG_DTOR(FmUndoContainerAction,NULL);
}

//------------------------------------------------------------------------------

void FmUndoContainerAction::DisposeElement( const Reference< XInterface > & xElem )
{
	Reference< XComponent > xComp( xElem, UNO_QUERY );
	if ( xComp.is() )
	{
        // and the object does not have a parent
		Reference< XChild >  xChild( xElem, UNO_QUERY );
		if ( xChild.is() && !xChild->getParent().is() )
            // -> dispose it
			xComp->dispose();
	}
}

//------------------------------------------------------------------------------
void FmUndoContainerAction::implReInsert( ) SAL_THROW( ( Exception ) )
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoContainerAction::implReInsert" );
	if ( m_xContainer->getCount() >= m_nIndex )
	{
        // insert the element
		Any aVal;
		if ( m_xContainer->getElementType() == ::getCppuType( static_cast< const Reference< XFormComponent >* >( NULL ) ) )
		{
			aVal <<= Reference< XFormComponent >( m_xElement, UNO_QUERY );
		}
		else
		{
			aVal <<= Reference< XForm >( m_xElement, UNO_QUERY );
		}
		m_xContainer->insertByIndex( m_nIndex, aVal );

        OSL_ENSURE( getElementPos( m_xContainer.get(), m_xElement ) == m_nIndex, "FmUndoContainerAction::implReInsert: insertion did not work!" );

        // register the events
        Reference< XEventAttacherManager >	xManager( m_xContainer, UNO_QUERY );
		if ( xManager.is() )
			xManager->registerScriptEvents( m_nIndex, m_aEvents );

        // we don't own the object anymore
		m_xOwnElement = NULL;
	}
}

//------------------------------------------------------------------------------
void FmUndoContainerAction::implReRemove( ) SAL_THROW( ( Exception ) )
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoContainerAction::implReRemove" );
    Reference< XInterface > xElement;
    if ( ( m_nIndex >= 0 ) && ( m_nIndex < m_xContainer->getCount() ) )
    	m_xContainer->getByIndex( m_nIndex ) >>= xElement;

	if ( xElement != m_xElement )
    {
        // the indexes in the container changed. Okay, so go the long way and
        // manually determine the index
        m_nIndex = getElementPos( m_xContainer.get(), m_xElement );
        if ( m_nIndex != -1 )
            xElement = m_xElement;
    }

    OSL_ENSURE( xElement == m_xElement, "FmUndoContainerAction::implReRemove: cannot find the element which I'm responsible for!" );
    if ( xElement == m_xElement )
	{
		Reference< XEventAttacherManager >	xManager( m_xContainer, UNO_QUERY );
		if ( xManager.is() )
			m_aEvents = xManager->getScriptEvents( m_nIndex );
		m_xContainer->removeByIndex( m_nIndex );
        // from now on, we own this object
		m_xOwnElement = m_xElement;
	}
}

//------------------------------------------------------------------------------
void FmUndoContainerAction::Undo()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoContainerAction::Undo" );
	FmXUndoEnvironment& rEnv = static_cast< FmFormModel& >( rMod ).GetUndoEnv();

	if ( m_xContainer.is() && !rEnv.IsLocked() && m_xElement.is() )
	{
		rEnv.Lock();
        try
        {
		    switch ( m_eAction )
		    {
			case Inserted:
                implReRemove();
                break;

			case Removed:
                implReInsert();
                break;
    	    }
        }
        catch( const Exception& )
        {
        	OSL_ENSURE( sal_False, "FmUndoContainerAction::Undo: caught an exception!" );
        }
		rEnv.UnLock();
	}
}

//------------------------------------------------------------------------------
void FmUndoContainerAction::Redo()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoContainerAction::Redo" );
	FmXUndoEnvironment& rEnv = static_cast< FmFormModel& >( rMod ).GetUndoEnv();
	if ( m_xContainer.is() && !rEnv.IsLocked() && m_xElement.is() )
	{
		rEnv.Lock();
        try
        {
	    	switch ( m_eAction )
		    {
			case Inserted:
                implReInsert();
                break;

			case Removed:
                implReRemove();
			    break;
    		}
        }
        catch( const Exception& )
        {
        	OSL_ENSURE( sal_False, "FmUndoContainerAction::Redo: caught an exception!" );
        }
		rEnv.UnLock();
	}
}

//------------------------------------------------------------------------------
FmUndoModelReplaceAction::FmUndoModelReplaceAction(FmFormModel& _rMod, SdrUnoObj* _pObject, const Reference< XControlModel > & _xReplaced)
	:SdrUndoAction(_rMod)
	,m_xReplaced(_xReplaced)
	,m_pObject(_pObject)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoModelReplaceAction::FmUndoModelReplaceAction" );
}

//------------------------------------------------------------------------------
FmUndoModelReplaceAction::~FmUndoModelReplaceAction()
{
	// dispose our element if nobody else is responsible for
	DisposeElement(m_xReplaced);
}

//------------------------------------------------------------------------------

void FmUndoModelReplaceAction::DisposeElement( const ::com::sun::star::uno::Reference< ::com::sun::star::awt::XControlModel>& xReplaced )
{
	Reference< XComponent >  xComp(xReplaced, UNO_QUERY);
	if (xComp.is())
	{
		Reference< XChild >  xChild(xReplaced, UNO_QUERY);
		if (!xChild.is() || !xChild->getParent().is())
			xComp->dispose();
	}
}

//------------------------------------------------------------------------------
void FmUndoModelReplaceAction::Undo()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoModelReplaceAction::Undo" );
	try
	{
		Reference< XControlModel > xCurrentModel( m_pObject->GetUnoControlModel() );

		// replace the model within the parent
		Reference< XChild > xCurrentAsChild( xCurrentModel, UNO_QUERY );
		Reference< XNameContainer > xCurrentsParent;
		if ( xCurrentAsChild.is() )
			xCurrentsParent = xCurrentsParent.query( xCurrentAsChild->getParent() );
		DBG_ASSERT( xCurrentsParent.is(), "FmUndoModelReplaceAction::Undo: invalid current model!" );

		if ( xCurrentsParent.is() )
		{
			// the form container works with FormComponents
			Reference< XFormComponent > xComponent( m_xReplaced, UNO_QUERY );
			DBG_ASSERT( xComponent.is(), "FmUndoModelReplaceAction::Undo: the new model is no form component !" );

			Reference< XPropertySet > xCurrentAsSet( xCurrentModel, UNO_QUERY );
			DBG_ASSERT( ::comphelper::hasProperty(FM_PROP_NAME, xCurrentAsSet ), "FmUndoModelReplaceAction::Undo : one of the models is invalid !");

			::rtl::OUString sName;
			xCurrentAsSet->getPropertyValue( FM_PROP_NAME ) >>= sName;
			xCurrentsParent->replaceByName( sName, makeAny( xComponent ) );

			m_pObject->SetUnoControlModel(m_xReplaced);
			m_pObject->SetChanged();

			m_xReplaced = xCurrentModel;
		}
	}
	catch(Exception&)
	{
		DBG_ERROR("FmUndoModelReplaceAction::Undo : could not replace the model !");
	}
}

//------------------------------------------------------------------------------
String FmUndoModelReplaceAction::GetComment() const
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "svx", "Ocke.Janssen@sun.com", "FmUndoModelReplaceAction::GetComment" );
	return SVX_RES(RID_STR_UNDO_MODEL_REPLACE);
}