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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2008 by Sun Microsystems, Inc.
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 * OpenOffice.org - a multi-platform office productivity suite
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 * $RCSfile: listenerbase.cxx,v $
 * $Revision: 1.5 $
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svtools.hxx"
#ifndef GCC
#endif

#ifndef DEBUG_HXX
#include <tools/debug.hxx>
#endif

#include "listenerbase.hxx"
#include "listeneriter.hxx"
#include "listener.hxx"
#include "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();
}