AOO410/main/comphelper/source/misc/SelectionMultiplex.cxx

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

#include <comphelper/SelectionMultiplex.hxx>
#include <osl/diagnose.h>

//.........................................................................
namespace comphelper
{
//.........................................................................

using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::view;

//========================================================================
//= OSelectionChangeListener
//========================================================================
//------------------------------------------------------------------------
OSelectionChangeListener::~OSelectionChangeListener()
{
	if (m_pAdapter)
		m_pAdapter->dispose();
}

//------------------------------------------------------------------
void OSelectionChangeListener::_disposing(const EventObject&) throw( RuntimeException)
{
	// nothing to do here
}

//------------------------------------------------------------------
void OSelectionChangeListener::disposeAdapter()
{
	if ( m_pAdapter )
		m_pAdapter->dispose();

    // will automatically set a new adapter
    OSL_ENSURE( !m_pAdapter, "OSelectionChangeListener::disposeAdapter: what did dispose do?" );
}

//------------------------------------------------------------------
void OSelectionChangeListener::setAdapter(OSelectionChangeMultiplexer* pAdapter)
{
	if (m_pAdapter)
	{
		::osl::MutexGuard aGuard(m_rMutex);
		m_pAdapter->release();
		m_pAdapter = NULL;
	}

	if (pAdapter)
	{
		::osl::MutexGuard aGuard(m_rMutex);
		m_pAdapter = pAdapter;
		m_pAdapter->acquire();
	}
}

//========================================================================
//= OSelectionChangeMultiplexer
//========================================================================
//------------------------------------------------------------------
OSelectionChangeMultiplexer::OSelectionChangeMultiplexer(OSelectionChangeListener* _pListener, const  Reference< XSelectionSupplier>& _rxSet, sal_Bool _bAutoReleaseSet)
			:m_xSet(_rxSet)
			,m_pListener(_pListener)
			,m_nLockCount(0)
			,m_bListening(sal_False)
			,m_bAutoSetRelease(_bAutoReleaseSet)
{
	m_pListener->setAdapter(this);
    osl_incrementInterlockedCount(&m_refCount);
    {
        Reference< XSelectionChangeListener> xPreventDelete(this);
        m_xSet->addSelectionChangeListener(xPreventDelete);
    }
    osl_decrementInterlockedCount(&m_refCount);
}

//------------------------------------------------------------------
OSelectionChangeMultiplexer::~OSelectionChangeMultiplexer()
{
}

//------------------------------------------------------------------
void OSelectionChangeMultiplexer::lock()
{
	++m_nLockCount;
}

//------------------------------------------------------------------
void OSelectionChangeMultiplexer::unlock()
{
	--m_nLockCount;
}

//------------------------------------------------------------------
void OSelectionChangeMultiplexer::dispose()
{
	if (m_bListening)
	{
		Reference< XSelectionChangeListener> xPreventDelete(this);

		m_xSet->removeSelectionChangeListener(xPreventDelete);

		m_pListener->setAdapter(NULL);

		m_pListener = NULL;
		m_bListening = sal_False;

		if (m_bAutoSetRelease)
			m_xSet = NULL;
	}
}

// XEventListener
//------------------------------------------------------------------
void SAL_CALL OSelectionChangeMultiplexer::disposing( const  EventObject& _rSource) throw( RuntimeException)
{
	if (m_pListener)
	{
		 // tell the listener
		if (!locked())
			m_pListener->_disposing(_rSource);
		// disconnect the listener
		if (m_pListener)	// may have been reset whilest calling into _disposing
			m_pListener->setAdapter(NULL);
	}

	m_pListener = NULL;
	m_bListening = sal_False;

	if (m_bAutoSetRelease)
		m_xSet = NULL;
}

// XSelectionChangeListener
//------------------------------------------------------------------
void SAL_CALL OSelectionChangeMultiplexer::selectionChanged( const  EventObject& _rEvent ) throw( RuntimeException)
{
	if (m_pListener && !locked())
		m_pListener->_selectionChanged(_rEvent);
}
//.........................................................................
}
//.........................................................................