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26 #ifndef IdTargetObserverRegistry_h
27 #define IdTargetObserverRegistry_h
29 #include "platform/heap/Handle.h"
30 #include "wtf/Forward.h"
31 #include "wtf/HashMap.h"
32 #include "wtf/HashSet.h"
33 #include "wtf/text/StringHash.h"
37 class IdTargetObserver;
39 class IdTargetObserverRegistry FINAL : public NoBaseWillBeGarbageCollectedFinalized<IdTargetObserverRegistry> {
40 WTF_MAKE_NONCOPYABLE(IdTargetObserverRegistry);
41 WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
42 friend class IdTargetObserver;
44 static PassOwnPtrWillBeRawPtr<IdTargetObserverRegistry> create();
46 void notifyObservers(const AtomicString& id);
47 bool hasObservers(const AtomicString& id) const;
50 IdTargetObserverRegistry() : m_notifyingObserversInSet(nullptr) { }
51 void addObserver(const AtomicString& id, IdTargetObserver*);
52 void removeObserver(const AtomicString& id, IdTargetObserver*);
53 void notifyObserversInternal(const AtomicString& id);
55 typedef WillBeHeapHashSet<RawPtrWillBeMember<IdTargetObserver> > ObserverSet;
56 typedef WillBeHeapHashMap<StringImpl*, OwnPtrWillBeMember<ObserverSet> > IdToObserverSetMap;
57 IdToObserverSetMap m_registry;
58 RawPtrWillBeMember<ObserverSet> m_notifyingObserversInSet;
61 inline void IdTargetObserverRegistry::notifyObservers(const AtomicString& id)
63 ASSERT(!m_notifyingObserversInSet);
64 if (id.isEmpty() || m_registry.isEmpty())
66 IdTargetObserverRegistry::notifyObserversInternal(id);
69 } // namespace WebCore
71 #endif // IdTargetObserverRegistry_h