AOO410/main/comphelper/source/misc/listenernotification.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
 * 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/listenernotification.hxx>

/** === begin UNO includes === **/
#include <com/sun/star/lang/DisposedException.hpp>
/** === end UNO includes === **/

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

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

	//====================================================================
	//= OListenerContainer
	//====================================================================
	//--------------------------------------------------------------------
    OListenerContainer::OListenerContainer( ::osl::Mutex& _rMutex )
        :m_aListeners( _rMutex )
    {
    }

    OListenerContainer::~OListenerContainer() {}

	//--------------------------------------------------------------------
    void OListenerContainer::impl_addListener( const Reference< XEventListener >& _rxListener )
    {
        OSL_PRECOND( _rxListener.is(), "OListenerContainer::impl_addListener: a NULL listener?!" );
        if ( _rxListener.is() )
            m_aListeners.addInterface( _rxListener );
    }
    
	//--------------------------------------------------------------------
    void OListenerContainer::impl_removeListener( const Reference< XEventListener >& _rxListener )
    {
#if OSL_DEBUG_LEVEL > 0
		::cppu::OInterfaceIteratorHelper aIter( m_aListeners );
        bool bFound = false;
		while ( aIter.hasMoreElements() && !bFound )
		{
            bFound = ( Reference< XInterface >( aIter.next() ) == _rxListener );
        }
        OSL_ENSURE( bFound, "OListenerContainer::impl_removeListener: sure your listener handling is correct? The given listener is not registered!" );
#endif
        m_aListeners.removeInterface( _rxListener );
    }

	//--------------------------------------------------------------------
    void OListenerContainer::disposing( const EventObject& _rEventSource )
    {
        m_aListeners.disposeAndClear( _rEventSource );
    }

	//--------------------------------------------------------------------
    void OListenerContainer::clear()
    {
        m_aListeners.clear();
    }

	//--------------------------------------------------------------------
    bool OListenerContainer::impl_notify( const EventObject& _rEvent ) SAL_THROW(( Exception ))
    {
		::cppu::OInterfaceIteratorHelper aIter( m_aListeners );
        bool bCancelled = false;
		while ( aIter.hasMoreElements() && !bCancelled )
		{
            Reference< XEventListener > xListener( static_cast< XEventListener* >( aIter.next() ) );
            if ( !xListener.is() )
                continue;

            try
            {
                bCancelled = !implNotify( xListener, _rEvent );
            }
            catch( const DisposedException& e )
            {
                // DisposedExceptions from the listener might indicate a
                // broken connection to a different environment.

                OSL_ENSURE( e.Context.is(), "OListenerContainer::impl_notify: caught dispose exception with empty Context field" );

                // If the exception stems from the listener then remove it
                // from the list of listeners.  If the Context field of the
                // exception is empty this is interpreted to indicate the
                // listener as well.
                if ( e.Context == xListener || !e.Context.is() )
                    aIter.remove();
            }
		}

        return !bCancelled;
    }

//........................................................................
}   // namespace comphelper
//........................................................................