/*
* 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.
*/
#ifndef IdTargetObserverRegistry_h
#define IdTargetObserverRegistry_h
#include "wtf/Forward.h"
#include "wtf/HashMap.h"
#include "wtf/HashSet.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/text/StringHash.h"
namespace WebCore {
class IdTargetObserver;
class IdTargetObserverRegistry {
WTF_MAKE_NONCOPYABLE(IdTargetObserverRegistry); WTF_MAKE_FAST_ALLOCATED;
friend class IdTargetObserver;
public:
static PassOwnPtr<IdTargetObserverRegistry> create();
void notifyObservers(const AtomicString& id);
bool hasObservers(const AtomicString& id) const;
private:
IdTargetObserverRegistry() : m_notifyingObserversInSet(0) { }
void addObserver(const AtomicString& id, IdTargetObserver*);
void removeObserver(const AtomicString& id, IdTargetObserver*);
void notifyObserversInternal(const AtomicString& id);
typedef HashSet<IdTargetObserver*> ObserverSet;
typedef HashMap<StringImpl*, OwnPtr<ObserverSet> > IdToObserverSetMap;
IdToObserverSetMap m_registry;
ObserverSet* m_notifyingObserversInSet;
};
inline void IdTargetObserverRegistry::notifyObservers(const AtomicString& id)
{
ASSERT(!m_notifyingObserversInSet);
if (id.isEmpty() || m_registry.isEmpty())
return;
IdTargetObserverRegistry::notifyObserversInternal(id);
}
} // namespace WebCore
#endif // IdTargetObserverRegistry_h