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#include <tools/debug.hxx>

#include "listenerbase.hxx"
#include "listeneriter.hxx"
#include "broadcast.hxx"
#include "listener.hxx"

namespace binfilter
{

SvtListenerIter* SvtListenerIter::pListenerIters = 0;

SvtListenerIter::SvtListenerIter( SvtBroadcaster& rBrdcst )
    : rRoot( rBrdcst )
{
    // hinten einketten!
    pNxtIter = 0;
    if( pListenerIters )
    {
        SvtListenerIter* pTmp = pListenerIters;
        while( pTmp->pNxtIter )
            pTmp = pTmp->pNxtIter;
        pTmp->pNxtIter = this;
    }
    else
        pListenerIters = this;

    pAkt = rRoot.pRoot;
    pDelNext = pAkt;
}



SvtListenerIter::~SvtListenerIter()
{
    if( pListenerIters )
    {
        if( pListenerIters == this )
            pListenerIters = pNxtIter;
        else
        {
            SvtListenerIter* pTmp = pListenerIters;
            while( pTmp->pNxtIter != this )
                if( 0 == ( pTmp = pTmp->pNxtIter ) )
                    return ;
            pTmp->pNxtIter = pNxtIter;
        }
    }
}

void SvtListenerIter::RemoveListener( SvtListenerBase& rDel,
                                        SvtListenerBase* pNext )
{
    // Update the ListenerIter
    SvtListenerIter* pTmp = pListenerIters;
    while( pTmp )
    {
        if( pTmp->pAkt == &rDel || pTmp->pDelNext == &rDel )
            pTmp->pDelNext = pNext;
        pTmp = pTmp->pNxtIter;
    }
}

SvtListener* SvtListenerIter::GoNext()
{
    if( pDelNext == pAkt )
    {
        pAkt = pAkt->GetRight();
        pDelNext = pAkt;
    }
    else
        pAkt = pDelNext;
    return pAkt ? pAkt->GetListener() : 0;
}

SvtListener* SvtListenerIter::GoStart()         // zum Anfang des Baums
{
    pAkt = rRoot.pRoot;
    if( pAkt )
        while( pAkt->GetLeft() )
            pAkt = pAkt->GetLeft();
    pDelNext = pAkt;
    return pAkt ? pAkt->GetListener() : 0;
}

}

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