78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
/*
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* Copyright (C) 2012 Google Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "IdTargetObserverRegistry.h"
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#include "IdTargetObserver.h"
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namespace WebCore {
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void IdTargetObserverRegistry::addObserver(const AtomString& id, IdTargetObserver* observer)
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{
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if (id.isEmpty())
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return;
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IdToObserverSetMap::AddResult result = m_registry.add(id.impl(), nullptr);
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if (result.isNewEntry)
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result.iterator->value = makeUnique<ObserverSet>();
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result.iterator->value->add(observer);
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}
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void IdTargetObserverRegistry::removeObserver(const AtomString& id, IdTargetObserver* observer)
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{
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if (id.isEmpty() || m_registry.isEmpty())
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return;
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IdToObserverSetMap::iterator iter = m_registry.find(id.impl());
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ObserverSet* set = iter->value.get();
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set->remove(observer);
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if (set->isEmpty() && set != m_notifyingObserversInSet)
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m_registry.remove(iter);
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}
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void IdTargetObserverRegistry::notifyObserversInternal(const AtomStringImpl& id)
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{
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ASSERT(!m_registry.isEmpty());
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m_notifyingObserversInSet = m_registry.get(&id);
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if (!m_notifyingObserversInSet)
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return;
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for (auto& observer : copyToVector(*m_notifyingObserversInSet)) {
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if (m_notifyingObserversInSet->contains(observer))
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observer->idTargetChanged();
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}
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if (m_notifyingObserversInSet->isEmpty())
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m_registry.remove(&id);
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m_notifyingObserversInSet = nullptr;
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}
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} // namespace WebCore
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