listener.cxx

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#include <svl/listener.hxx>
#include <svl/broadcast.hxx>
 
SvtListener::~SvtListener() COVERITY_NOEXCEPT_FALSE
{
    // Unregister itself from all broadcasters it's listening to.
    EndListeningAll();
}
 
// registers at a specific SvtBroadcaster
 
bool SvtListener::StartListening( SvtBroadcaster& rBroadcaster )
{
    std::pair<BroadcastersType::const_iterator, bool> r =
        maBroadcasters.insert(&rBroadcaster);
    if (r.second)
    {
        // This is a new broadcaster.
        rBroadcaster.Add(this);
    }
    return r.second;
}
 
void SvtListener::EndListening( SvtBroadcaster& rBroadcaster )
{
    BroadcastersType::const_iterator it = maBroadcasters.find(&rBroadcaster);
    if (it == maBroadcasters.end())
        // Not listening to this broadcaster.
        return;
    maBroadcasters.erase(it);
 
    rBroadcaster.Remove(this);
}
 
// called from the SvtBroadcaster destructor, used to avoid calling
// back into the broadcaster again
void SvtListener::BroadcasterDying( SvtBroadcaster& rBroadcaster )
{
    BroadcastersType::const_iterator it = maBroadcasters.find(&rBroadcaster);
    if (it != maBroadcasters.end())
        maBroadcasters.erase(it);
}
 
void SvtListener::EndListeningAll()
{
    for (SvtBroadcaster* p : maBroadcasters)
    {
        SvtBroadcaster& rBC = *p;
        rBC.Remove(this);
    }
    maBroadcasters.clear();
}
 
 
void SvtListener::CopyAllBroadcasters( const SvtListener& r )
{
    EndListeningAll();
    BroadcastersType aCopy(r.maBroadcasters);
    maBroadcasters.swap(aCopy);
    for (SvtBroadcaster* p : maBroadcasters)
    {
        p->Add(this);
    }
}
 
void SvtListener::Notify( const SfxHint& /*rHint*/ ) {}
 
void SvtListener::Query( QueryBase& /*rQuery*/ ) const {}
 
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