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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 <assert.h>
#include <tools/debug.hxx>
#include <svl/hint.hxx>
#include <svl/smplhint.hxx>
#include <svl/lstner.hxx>
#include <svl/brdcst.hxx>
#include <algorithm>
TYPEINIT0(SfxBroadcaster);
// broadcast immediately
void SfxBroadcaster::Broadcast( const SfxHint &rHint )
{
// notify all registered listeners exactly once
for (size_t n = 0; n < m_Listeners.size(); ++n)
{
SfxListener *const pListener = m_Listeners[n];
if (pListener) {
pListener->Notify( *this, rHint );
}
}
}
// unregister all listeners
SfxBroadcaster::~SfxBroadcaster()
{
Broadcast( SfxSimpleHint(SFX_HINT_DYING) );
// remove all still registered listeners
for (size_t nPos = 0; nPos < m_Listeners.size(); ++nPos)
{
SfxListener *const pListener = m_Listeners[nPos];
if (pListener) {
pListener->RemoveBroadcaster_Impl(*this);
}
}
}
// simple ctor of class SfxBroadcaster
SfxBroadcaster::SfxBroadcaster()
{
}
// copy ctor of class SfxBroadcaster
SfxBroadcaster::SfxBroadcaster( const SfxBroadcaster &rBC )
{
for (size_t n = 0; n < rBC.m_Listeners.size(); ++n)
{
SfxListener *const pListener = rBC.m_Listeners[n];
if (pListener) {
pListener->StartListening( *this );
}
}
}
// add a new SfxListener to the list
void SfxBroadcaster::AddListener( SfxListener& rListener )
{
for (size_t i = 0; i < m_Listeners.size(); ++i)
{
if (!m_Listeners[i]) // removed by RemoveListener?
{
m_Listeners[i] = &rListener;
return;
}
}
m_Listeners.push_back(&rListener);
}
// called, if no more listeners exists
void SfxBroadcaster::ListenersGone()
{
}
// forward a notification to all registered listeners
void SfxBroadcaster::Forward(SfxBroadcaster& rBC, const SfxHint& rHint)
{
for (size_t i = 0; i < m_Listeners.size(); ++i)
{
SfxListener *const pListener = m_Listeners[i];
if (pListener) {
pListener->Notify( rBC, rHint );
}
}
}
// remove one SfxListener from the list
void SfxBroadcaster::RemoveListener( SfxListener& rListener )
{
SfxListenerArr_Impl::iterator aIter = std::find(
m_Listeners.begin(), m_Listeners.end(), &rListener);
assert(aIter != m_Listeners.end()); // "RemoveListener: Listener unknown"
// DO NOT erase the listener, set the pointer to 0
// because the current continuation may contain this->Broadcast
*aIter = 0;
if ( !HasListeners() )
ListenersGone();
}
bool SfxBroadcaster::HasListeners() const
{
for (size_t i = 0; i < m_Listeners.size(); ++i)
{
if (m_Listeners[i]) {
return true;
}
}
return false;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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