AOO410/main/embeddedobj/source/msole/olemisc.cxx

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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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
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 *   http://www.apache.org/licenses/LICENSE-2.0
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 * 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
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_embeddedobj.hxx"
#include <com/sun/star/embed/EmbedUpdateModes.hpp>
#include <com/sun/star/embed/EmbedStates.hpp>
#include <com/sun/star/lang/XComponent.hpp>
#include <com/sun/star/lang/DisposedException.hpp>

#include <cppuhelper/interfacecontainer.h>

#include <oleembobj.hxx>
#include <olecomponent.hxx>

#include "ownview.hxx"

using namespace ::com::sun::star;

sal_Bool KillFile_Impl( const ::rtl::OUString& aURL, const uno::Reference< lang::XMultiServiceFactory >& xFactory );


//------------------------------------------------------
OleEmbeddedObject::OleEmbeddedObject( const uno::Reference< lang::XMultiServiceFactory >& xFactory,
									  const uno::Sequence< sal_Int8 >& aClassID,
									  const ::rtl::OUString& aClassName )
: m_pOleComponent( NULL )
, m_pInterfaceContainer( NULL )
, m_bReadOnly( sal_False )
, m_bDisposed( sal_False )
, m_nObjectState( -1 )
, m_nTargetState( -1 )
, m_nUpdateMode ( embed::EmbedUpdateModes::ALWAYS_UPDATE )
, m_xFactory( xFactory )
, m_aClassID( aClassID )
, m_aClassName( aClassName )
, m_bWaitSaveCompleted( sal_False )
, m_bNewVisReplInStream( sal_True )
, m_bStoreLoaded( sal_False )
, m_bVisReplInitialized( sal_False )
, m_bVisReplInStream( sal_False )
, m_bStoreVisRepl( sal_False )
, m_bIsLink( sal_False )
, m_bHasCachedSize( sal_False )
, m_nCachedAspect( 0 )
, m_bHasSizeToSet( sal_False )
, m_nAspectToSet( 0 )
, m_bGotStatus( sal_False )
, m_nStatus( 0 )
, m_nStatusAspect( 0 )
, m_pOwnView( NULL )
, m_bFromClipboard( sal_False )
, m_bTriedConversion( sal_False )
{
}

//------------------------------------------------------
// In case of loading from persistent entry the classID of the object
// will be retrieved from the entry, during construction it is unknown
OleEmbeddedObject::OleEmbeddedObject( const uno::Reference< lang::XMultiServiceFactory >& xFactory, sal_Bool bLink )
: m_pOleComponent( NULL )
, m_pInterfaceContainer( NULL )
, m_bReadOnly( sal_False )
, m_bDisposed( sal_False )
, m_nObjectState( -1 )
, m_nTargetState( -1 )
, m_nUpdateMode( embed::EmbedUpdateModes::ALWAYS_UPDATE )
, m_xFactory( xFactory )
, m_bWaitSaveCompleted( sal_False )
, m_bNewVisReplInStream( sal_True )
, m_bStoreLoaded( sal_False )
, m_bVisReplInitialized( sal_False )
, m_bVisReplInStream( sal_False )
, m_bStoreVisRepl( sal_False )
, m_bIsLink( bLink )
, m_bHasCachedSize( sal_False )
, m_nCachedAspect( 0 )
, m_bHasSizeToSet( sal_False )
, m_nAspectToSet( 0 )
, m_bGotStatus( sal_False )
, m_nStatus( 0 )
, m_nStatusAspect( 0 )
, m_pOwnView( NULL )
, m_bFromClipboard( sal_False )
, m_bTriedConversion( sal_False )
{
}
#ifdef WNT
//------------------------------------------------------
// this constructor let object be initialized from clipboard
OleEmbeddedObject::OleEmbeddedObject( const uno::Reference< lang::XMultiServiceFactory >& xFactory )
: m_pOleComponent( NULL )
, m_pInterfaceContainer( NULL )
, m_bReadOnly( sal_False )
, m_bDisposed( sal_False )
, m_nObjectState( -1 )
, m_nTargetState( -1 )
, m_nUpdateMode( embed::EmbedUpdateModes::ALWAYS_UPDATE )
, m_xFactory( xFactory )
, m_bWaitSaveCompleted( sal_False )
, m_bNewVisReplInStream( sal_True )
, m_bStoreLoaded( sal_False )
, m_bVisReplInitialized( sal_False )
, m_bVisReplInStream( sal_False )
, m_bStoreVisRepl( sal_False )
, m_bIsLink( sal_False )
, m_bHasCachedSize( sal_False )
, m_nCachedAspect( 0 )
, m_bHasSizeToSet( sal_False )
, m_nAspectToSet( 0 )
, m_bGotStatus( sal_False )
, m_nStatus( 0 )
, m_nStatusAspect( 0 )
, m_pOwnView( NULL )
, m_bFromClipboard( sal_True )
, m_bTriedConversion( sal_False )
{
}
#endif
//------------------------------------------------------
OleEmbeddedObject::~OleEmbeddedObject()
{
	OSL_ENSURE( !m_pInterfaceContainer && !m_pOleComponent && !m_xObjectStream.is(),
					"The object is not closed! DISASTER is possible!" );

	if ( m_pOleComponent || m_pInterfaceContainer || m_xObjectStream.is() )
	{
		// the component must be cleaned during closing
		m_refCount++; // to avoid crash
		try {
			Dispose();
		} catch( uno::Exception& ) {}
	}

	if ( m_aTempURL.getLength() )
       	KillFile_Impl( m_aTempURL, m_xFactory );

	if ( m_aTempDumpURL.getLength() )
       	KillFile_Impl( m_aTempDumpURL, m_xFactory );
}

//------------------------------------------------------
void OleEmbeddedObject::MakeEventListenerNotification_Impl( const ::rtl::OUString& aEventName )
{
	if ( m_pInterfaceContainer )
	{
	   	::cppu::OInterfaceContainerHelper* pContainer =
			m_pInterfaceContainer->getContainer(
									::getCppuType( ( const uno::Reference< document::XEventListener >*) NULL ) );
    	if ( pContainer != NULL )
		{
    		document::EventObject aEvent( static_cast< ::cppu::OWeakObject* >( this ), aEventName );
        	::cppu::OInterfaceIteratorHelper pIterator(*pContainer);
        	while (pIterator.hasMoreElements())
        	{
            	try
            	{
                	((document::XEventListener*)pIterator.next())->notifyEvent( aEvent );
            	}
            	catch( uno::RuntimeException& )
            	{
            	}
        	}
		}
	}
}
#ifdef WNT
//----------------------------------------------
void OleEmbeddedObject::StateChangeNotification_Impl( sal_Bool bBeforeChange, sal_Int32 nOldState, sal_Int32 nNewState )
{
	if ( m_pInterfaceContainer )
	{
    	::cppu::OInterfaceContainerHelper* pContainer = m_pInterfaceContainer->getContainer(
							::getCppuType( ( const uno::Reference< embed::XStateChangeListener >*) NULL ) );
    	if ( pContainer != NULL )
		{
    		lang::EventObject aSource( static_cast< ::cppu::OWeakObject* >( this ) );
        	::cppu::OInterfaceIteratorHelper pIterator(*pContainer);

        	while (pIterator.hasMoreElements())
        	{
				if ( bBeforeChange )
				{
            		try
            		{
                		((embed::XStateChangeListener*)pIterator.next())->changingState( aSource, nOldState, nNewState );
            		}
            		catch( uno::Exception& )
            		{
						// even if the listener complains ignore it for now
            		}
				}
				else
				{
			   		try
            		{
                		((embed::XStateChangeListener*)pIterator.next())->stateChanged( aSource, nOldState, nNewState );
            		}
            		catch( uno::Exception& )
            		{
						// if anything happened it is problem of listener, ignore it
            		}
				}
        	}
		}
	}
}
#endif
//------------------------------------------------------
void OleEmbeddedObject::GetRidOfComponent()
{
#ifdef WNT
	if ( m_pOleComponent )
	{
		if ( m_nObjectState != -1 && m_nObjectState != embed::EmbedStates::LOADED )
			SaveObject_Impl();
			
		m_pOleComponent->removeCloseListener( m_xClosePreventer );
		try
		{
			m_pOleComponent->close( sal_False );
		}
		catch( uno::Exception& )
		{
			// TODO: there should be a special listener to wait for component closing
			// 		 and to notify object, may be object itself can be such a listener
			m_pOleComponent->addCloseListener( m_xClosePreventer );
			throw;
		}

		m_pOleComponent->disconnectEmbeddedObject();
		m_pOleComponent->release();
		m_pOleComponent = NULL;
	}
#endif
}

//------------------------------------------------------
void OleEmbeddedObject::Dispose()
{
	if ( m_pInterfaceContainer )
	{
    	lang::EventObject aSource( static_cast< ::cppu::OWeakObject* >( this ) );
		m_pInterfaceContainer->disposeAndClear( aSource );
		delete m_pInterfaceContainer;
		m_pInterfaceContainer = NULL;
	}

	if ( m_pOwnView )
	{
		m_pOwnView->Close();
		m_pOwnView->release();
		m_pOwnView = NULL;
	}

	if ( m_pOleComponent )
		try {
			GetRidOfComponent();
		} catch( uno::Exception& )
		{
			m_bDisposed = true;
			throw; // TODO: there should be a special listener that will close object when
					// component is finally closed
		}

	if ( m_xObjectStream.is() )
	{
		uno::Reference< lang::XComponent > xComp( m_xObjectStream, uno::UNO_QUERY );
		OSL_ENSURE( xComp.is(), "Storage stream doesn't support XComponent!\n" );

		if ( xComp.is() )
		{
			try {
				xComp->dispose();
			} catch( uno::Exception& ) {}
		}
		m_xObjectStream = uno::Reference< io::XStream >();
	}

	m_xParentStorage = uno::Reference< embed::XStorage >();

	m_bDisposed = true;
}

//------------------------------------------------------
uno::Sequence< sal_Int8 > SAL_CALL OleEmbeddedObject::getClassID()
		throw ( uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XEmbeddedObject > xWrappedObject = m_xWrappedObject;
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        return xWrappedObject->getClassID();
    }
    // end wrapping related part ====================

	::osl::MutexGuard aGuard( m_aMutex );
	if ( m_bDisposed )
		throw lang::DisposedException(); // TODO

	return m_aClassID;
}
		
//------------------------------------------------------
::rtl::OUString SAL_CALL OleEmbeddedObject::getClassName()
		throw ( uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XEmbeddedObject > xWrappedObject = m_xWrappedObject;
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        return xWrappedObject->getClassName();
    }
    // end wrapping related part ====================

	::osl::MutexGuard aGuard( m_aMutex );
	if ( m_bDisposed )
		throw lang::DisposedException(); // TODO

	return m_aClassName;
}

//------------------------------------------------------
void SAL_CALL OleEmbeddedObject::setClassInfo(
				const uno::Sequence< sal_Int8 >& aClassID, const ::rtl::OUString& aClassName )
		throw ( lang::NoSupportException,
				uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XEmbeddedObject > xWrappedObject = m_xWrappedObject;
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->setClassInfo( aClassID, aClassName );
        return;
    }
    // end wrapping related part ====================

	// the object class info can not be changed explicitly
	throw lang::NoSupportException(); //TODO:
}

//------------------------------------------------------
uno::Reference< util::XCloseable > SAL_CALL OleEmbeddedObject::getComponent()
		throw ( uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XEmbeddedObject > xWrappedObject = m_xWrappedObject;
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        return xWrappedObject->getComponent();
    }
    // end wrapping related part ====================

	::osl::MutexGuard aGuard( m_aMutex );
	if ( m_bDisposed )
		throw lang::DisposedException(); // TODO

	if ( m_nObjectState == -1 ) // || m_nObjectState == embed::EmbedStates::LOADED )
	{
		// the object is still not running
		throw embed::WrongStateException( ::rtl::OUString::createFromAscii( "The object is not loaded!\n" ),
										uno::Reference< uno::XInterface >( static_cast< ::cppu::OWeakObject* >(this) ) );
	}

	// if ( m_bWaitSaveCompleted )
	// 	throw embed::WrongStateException(
	// 				::rtl::OUString::createFromAscii( "The object waits for saveCompleted() call!\n" ),
	// 				uno::Reference< uno::XInterface >( reinterpret_cast< ::cppu::OWeakObject* >(this) ) );

	if ( !m_pOleComponent )
	{
		// TODO/LATER: Is it correct???
		return uno::Reference< util::XCloseable >();
		// throw uno::RuntimeException(); // TODO
	}

	return uno::Reference< util::XCloseable >( static_cast< ::cppu::OWeakObject* >( m_pOleComponent ), uno::UNO_QUERY );
}

//----------------------------------------------
void SAL_CALL OleEmbeddedObject::addStateChangeListener( const uno::Reference< embed::XStateChangeListener >& xListener )
	throw ( uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XStateChangeBroadcaster > xWrappedObject( m_xWrappedObject, uno::UNO_QUERY );
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->addStateChangeListener( xListener );
        return;
    }
    // end wrapping related part ====================

	::osl::MutexGuard aGuard( m_aMutex );
	if ( m_bDisposed )
		throw lang::DisposedException(); // TODO

	if ( !m_pInterfaceContainer )
		m_pInterfaceContainer = new ::cppu::OMultiTypeInterfaceContainerHelper( m_aMutex );
	
	m_pInterfaceContainer->addInterface( ::getCppuType( (const uno::Reference< embed::XStateChangeListener >*)0 ),
														xListener );
}

//----------------------------------------------
void SAL_CALL OleEmbeddedObject::removeStateChangeListener(
					const uno::Reference< embed::XStateChangeListener >& xListener )
	throw (uno::RuntimeException)
{
    // begin wrapping related part ====================
    uno::Reference< embed::XStateChangeBroadcaster > xWrappedObject( m_xWrappedObject, uno::UNO_QUERY );
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->removeStateChangeListener( xListener );
        return;
    }
    // end wrapping related part ====================

	::osl::MutexGuard aGuard( m_aMutex );
	if ( m_pInterfaceContainer )
		m_pInterfaceContainer->removeInterface( ::getCppuType( (const uno::Reference< embed::XStateChangeListener >*)0 ),
												xListener );
}


//----------------------------------------------
void SAL_CALL OleEmbeddedObject::close( sal_Bool bDeliverOwnership )
	throw ( util::CloseVetoException,
			uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XEmbeddedObject > xWrappedObject = m_xWrappedObject;
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->close( bDeliverOwnership );
        return;
    }
    // end wrapping related part ====================

	::osl::MutexGuard aGuard( m_aMutex );
	if ( m_bDisposed )
		throw lang::DisposedException(); // TODO

    uno::Reference< uno::XInterface > xSelfHold( static_cast< ::cppu::OWeakObject* >( this ) );
    lang::EventObject aSource( static_cast< ::cppu::OWeakObject* >( this ) );

	if ( m_pInterfaceContainer )
	{
    	::cppu::OInterfaceContainerHelper* pContainer =
			m_pInterfaceContainer->getContainer( ::getCppuType( ( const uno::Reference< util::XCloseListener >*) NULL ) );
    	if ( pContainer != NULL )
		{
        	::cppu::OInterfaceIteratorHelper pIterator(*pContainer);
        	while (pIterator.hasMoreElements())
        	{
            	try
            	{
                	((util::XCloseListener*)pIterator.next())->queryClosing( aSource, bDeliverOwnership );
            	}
            	catch( uno::RuntimeException& )
            	{
                	pIterator.remove();
            	}
        	}
		}

    	pContainer = m_pInterfaceContainer->getContainer(
									::getCppuType( ( const uno::Reference< util::XCloseListener >*) NULL ) );
    	if ( pContainer != NULL )
		{
        	::cppu::OInterfaceIteratorHelper pCloseIterator(*pContainer);
        	while (pCloseIterator.hasMoreElements())
        	{
            	try
            	{
                	((util::XCloseListener*)pCloseIterator.next())->notifyClosing( aSource );
            	}
            	catch( uno::RuntimeException& )
            	{
                	pCloseIterator.remove();
            	}
        	}
		}
	}

	Dispose();
}

//----------------------------------------------
void SAL_CALL OleEmbeddedObject::addCloseListener( const uno::Reference< util::XCloseListener >& xListener )
	throw ( uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XEmbeddedObject > xWrappedObject = m_xWrappedObject;
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->addCloseListener( xListener );
        return;
    }
    // end wrapping related part ====================

	::osl::MutexGuard aGuard( m_aMutex );
	if ( m_bDisposed )
		throw lang::DisposedException(); // TODO

	if ( !m_pInterfaceContainer )
		m_pInterfaceContainer = new ::cppu::OMultiTypeInterfaceContainerHelper( m_aMutex );
	
	m_pInterfaceContainer->addInterface( ::getCppuType( (const uno::Reference< util::XCloseListener >*)0 ), xListener );
}

//----------------------------------------------
void SAL_CALL OleEmbeddedObject::removeCloseListener( const uno::Reference< util::XCloseListener >& xListener )
	throw (uno::RuntimeException)
{
    // begin wrapping related part ====================
    uno::Reference< embed::XEmbeddedObject > xWrappedObject = m_xWrappedObject;
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->removeCloseListener( xListener );
        return;
    }
    // end wrapping related part ====================

	::osl::MutexGuard aGuard( m_aMutex );
	if ( m_bDisposed )
		throw lang::DisposedException(); // TODO

	if ( m_pInterfaceContainer )
		m_pInterfaceContainer->removeInterface( ::getCppuType( (const uno::Reference< util::XCloseListener >*)0 ),
												xListener );
}

//------------------------------------------------------
void SAL_CALL OleEmbeddedObject::addEventListener( const uno::Reference< document::XEventListener >& xListener )
		throw ( uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XEmbeddedObject > xWrappedObject = m_xWrappedObject;
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->addEventListener( xListener );
        return;
    }
    // end wrapping related part ====================

	::osl::MutexGuard aGuard( m_aMutex );
	if ( m_bDisposed )
		throw lang::DisposedException(); // TODO

	if ( !m_pInterfaceContainer )
		m_pInterfaceContainer = new ::cppu::OMultiTypeInterfaceContainerHelper( m_aMutex );
	
	m_pInterfaceContainer->addInterface( ::getCppuType( (const uno::Reference< document::XEventListener >*)0 ), xListener );
}

//------------------------------------------------------
void SAL_CALL OleEmbeddedObject::removeEventListener(
				const uno::Reference< document::XEventListener >& xListener )
		throw ( uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XEmbeddedObject > xWrappedObject = m_xWrappedObject;
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->removeEventListener( xListener );
        return;
    }
    // end wrapping related part ====================

	::osl::MutexGuard aGuard( m_aMutex );
	if ( m_bDisposed )
		throw lang::DisposedException(); // TODO

	if ( m_pInterfaceContainer )
		m_pInterfaceContainer->removeInterface( ::getCppuType( (const uno::Reference< document::XEventListener >*)0 ),
												xListener );
}

// XInplaceObject ( wrapper related implementation )
//------------------------------------------------------
void SAL_CALL OleEmbeddedObject::setObjectRectangles( const awt::Rectangle& aPosRect,
										  			 	const awt::Rectangle& aClipRect )
		throw ( embed::WrongStateException,
				uno::Exception,
				uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XInplaceObject > xWrappedObject( m_xWrappedObject, uno::UNO_QUERY );
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->setObjectRectangles( aPosRect, aClipRect );
        return;
    }
    // end wrapping related part ====================

    throw embed::WrongStateException();
}

//------------------------------------------------------
void SAL_CALL OleEmbeddedObject::enableModeless( sal_Bool bEnable )
		throw ( embed::WrongStateException,
				uno::Exception,
				uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XInplaceObject > xWrappedObject( m_xWrappedObject, uno::UNO_QUERY );
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->enableModeless( bEnable );
        return;
    }
    // end wrapping related part ====================

    throw embed::WrongStateException();
}

//------------------------------------------------------
void SAL_CALL OleEmbeddedObject::translateAccelerators(
					const uno::Sequence< awt::KeyEvent >& aKeys )
		throw ( embed::WrongStateException,
				uno::RuntimeException )
{
    // begin wrapping related part ====================
    uno::Reference< embed::XInplaceObject > xWrappedObject( m_xWrappedObject, uno::UNO_QUERY );
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->translateAccelerators( aKeys );
        return;
    }
    // end wrapping related part ====================

    // throw embed::WrongStateException();
}

// XChild
//------------------------------------------------------
com::sun::star::uno::Reference< com::sun::star::uno::XInterface > SAL_CALL OleEmbeddedObject::getParent() throw (::com::sun::star::uno::RuntimeException)
{
    // begin wrapping related part ====================
    uno::Reference< container::XChild > xWrappedObject( m_xWrappedObject, uno::UNO_QUERY );
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        return xWrappedObject->getParent();
    }
    // end wrapping related part ====================

    return m_xParent;
}

//------------------------------------------------------
void SAL_CALL OleEmbeddedObject::setParent( const com::sun::star::uno::Reference< com::sun::star::uno::XInterface >& xParent ) throw (::com::sun::star::lang::NoSupportException, ::com::sun::star::uno::RuntimeException)
{
    // begin wrapping related part ====================
    uno::Reference< container::XChild > xWrappedObject( m_xWrappedObject, uno::UNO_QUERY );
    if ( xWrappedObject.is() )
    {
        // the object was converted to OOo embedded object, the current implementation is now only a wrapper
        xWrappedObject->setParent( xParent );
        return;
    }
    // end wrapping related part ====================

    m_xParent = xParent;
}