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

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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_comphelper.hxx"
#include <comphelper/weakeventlistener.hxx>
#include <osl/diagnose.h>


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

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

	//=====================================================================
	//= OWeakListenerAdapter
	//=====================================================================
	//---------------------------------------------------------------------
	OWeakListenerAdapterBase::~OWeakListenerAdapterBase()
	{
	}

	//=====================================================================
	//= OWeakEventListenerAdapter
	//=====================================================================
	//---------------------------------------------------------------------
	OWeakEventListenerAdapter::OWeakEventListenerAdapter( Reference< XWeak > _rxListener, Reference< XComponent > _rxBroadcaster )
		:OWeakEventListenerAdapter_Base( _rxListener, _rxBroadcaster )
	{
		// add ourself as listener to the broadcaster
		OSL_ENSURE( _rxBroadcaster.is(), "OWeakEventListenerAdapter::OWeakEventListenerAdapter: invalid broadcaster!" );
		if ( _rxBroadcaster.is() )
		{
			osl_incrementInterlockedCount( &m_refCount );
			{
				_rxBroadcaster->addEventListener( this );
			}
			osl_decrementInterlockedCount( &m_refCount );
			OSL_ENSURE( m_refCount > 0, "OWeakEventListenerAdapter::OWeakEventListenerAdapter: oops - not to be used with implementations which hold their listeners weak!" );
				// the one and only reason for this adapter class (A) is to add as listener to a component (C) which
				// holds its listeners hard, and forward all calls then to another listener (L) which is
				// held weak by A.
				// Now if C holds listeners weak, then we do not need A, we can add L directly to C.
		}

		OSL_ENSURE( getListener().is(), "OWeakEventListenerAdapter::OWeakEventListenerAdapter: invalid listener (does not support the XEventListener interface)!" );
	}

	//---------------------------------------------------------------------
	void SAL_CALL OWeakEventListenerAdapter::disposing( )
	{
		Reference< XComponent > xBroadcaster( getBroadcaster( ), UNO_QUERY );
		OSL_ENSURE( xBroadcaster.is(), "OWeakEventListenerAdapter::disposing: broadcaster is invalid in the meantime! How this?" );
		if ( xBroadcaster.is() )
		{
			xBroadcaster->removeEventListener( this );
		}

		resetListener();
	}

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