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Diffstat (limited to 'svl/source/notify/SfxBroadcaster.cxx')
-rw-r--r-- | svl/source/notify/SfxBroadcaster.cxx | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/svl/source/notify/SfxBroadcaster.cxx b/svl/source/notify/SfxBroadcaster.cxx new file mode 100644 index 000000000000..2fe79033b3b7 --- /dev/null +++ b/svl/source/notify/SfxBroadcaster.cxx @@ -0,0 +1,150 @@ +/* -*- 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/SfxBroadcaster.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: */ |