AOO410/main/svl/source/notify/listenerbase.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
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svl.hxx"

#include <tools/debug.hxx>
#include "listenerbase.hxx"
#include <svl/listeneriter.hxx>
#include <svl/listener.hxx>
#include <svl/broadcast.hxx>


SvtListenerBase::SvtListenerBase( SvtListener& rLst,
								  SvtBroadcaster& rBroadcaster )
	: pLeft( 0 ), pRight( 0 ),
	pBroadcaster( &rBroadcaster ), pListener( &rLst )
{
	pNext = rLst.pBrdCastLst;
	rLst.pBrdCastLst = this;

	if( pBroadcaster->pRoot )
	{
		// set ever behind the root
		pRight = pBroadcaster->pRoot->pRight;
		pBroadcaster->pRoot->pRight = this;
		this->pLeft = pBroadcaster->pRoot;
		if( pRight )
			pRight->pLeft = this;
	}
	else
		pBroadcaster->pRoot = this;
}

SvtListenerBase::~SvtListenerBase()
{
	SvtListenerBase *pR = pRight, *pL = pLeft;
	if( pBroadcaster->pRoot )
		pBroadcaster->pRoot = pL ? pL : pR;

	if( pL )
		pL->pRight = pR;
	if( pR )
		pR->pLeft = pL;

	SvtListenerIter::RemoveListener( *this, pR );

	if( !pBroadcaster->pRoot )
		pBroadcaster->ListenersGone();
}