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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file 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 "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <svl/broadcast.hxx>
#include <svl/listener.hxx>
#include <svl/smplhint.hxx>
namespace {
class StartListeningHandler : std::unary_function<SvtListener*, void>
{
SvtBroadcaster& mrBC;
public:
StartListeningHandler( SvtBroadcaster& rBC ) : mrBC(rBC) {}
void operator() ( SvtListener* p )
{
p->StartListening(mrBC);
}
};
class EndListeningHandler : std::unary_function<SvtListener*, void>
{
SvtBroadcaster& mrBC;
public:
EndListeningHandler( SvtBroadcaster& rBC ) : mrBC(rBC) {}
void operator() ( SvtListener* p )
{
p->EndListening(mrBC);
}
};
class NotifyHandler : std::unary_function<SvtListener*, void>
{
SvtBroadcaster& mrBC;
const SfxHint& mrHint;
public:
NotifyHandler( SvtBroadcaster& rBC, const SfxHint& rHint ) : mrBC(rBC), mrHint(rHint) {}
void operator() ( SvtListener* p )
{
p->Notify(mrBC, mrHint);
}
};
}
void SvtBroadcaster::Add( SvtListener* p )
{
maListeners.insert(p);
}
void SvtBroadcaster::Remove( SvtListener* p )
{
if (mbDying)
return;
maListeners.erase(p);
if (maListeners.empty())
ListenersGone();
}
SvtBroadcaster::SvtBroadcaster() : mbDying(false) {}
SvtBroadcaster::SvtBroadcaster( const SvtBroadcaster &rBC ) :
maListeners(rBC.maListeners), mbDying(false)
{
std::for_each(maListeners.begin(), maListeners.end(), StartListeningHandler(*this));
}
SvtBroadcaster::~SvtBroadcaster()
{
mbDying = true;
Broadcast( SfxSimpleHint(SFX_HINT_DYING) );
// unregister all listeners.
std::for_each(maListeners.begin(), maListeners.end(), EndListeningHandler(*this));
}
void SvtBroadcaster::Broadcast( const SfxHint &rHint )
{
std::for_each(maListeners.begin(), maListeners.end(), NotifyHandler(*this, rHint));
}
void SvtBroadcaster::ListenersGone() {}
SvtBroadcaster::ListenersType& SvtBroadcaster::GetAllListeners()
{
return maListeners;
}
bool SvtBroadcaster::HasListeners() const
{
return !maListeners.empty();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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