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