xref: /AOO42X/main/comphelper/source/misc/SelectionMultiplex.cxx (revision dde7d3faf6dcd9cbeb7b48ba6d0cea5ffcc883d0)

/**************************************************************
 *
 * 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_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);
}
//.........................................................................
}
//.........................................................................