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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/PassOwnPtr.h"
34 #include "wtf/text/StringHash.h"
38 class IdTargetObserver;
40 class IdTargetObserverRegistry FINAL : public NoBaseWillBeGarbageCollectedFinalized<IdTargetObserverRegistry> {
41 WTF_MAKE_NONCOPYABLE(IdTargetObserverRegistry);
42 WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
43 friend class IdTargetObserver;
45 static PassOwnPtrWillBeRawPtr<IdTargetObserverRegistry> create();
47 void notifyObservers(const AtomicString& id);
48 bool hasObservers(const AtomicString& id) const;
51 IdTargetObserverRegistry() : m_notifyingObserversInSet(nullptr) { }
52 void addObserver(const AtomicString& id, IdTargetObserver*);
53 void removeObserver(const AtomicString& id, IdTargetObserver*);
54 void notifyObserversInternal(const AtomicString& id);
56 typedef WillBeHeapHashSet<RawPtrWillBeMember<IdTargetObserver> > ObserverSet;
57 typedef WillBeHeapHashMap<StringImpl*, OwnPtrWillBeMember<ObserverSet> > IdToObserverSetMap;
58 IdToObserverSetMap m_registry;
59 RawPtrWillBeMember<ObserverSet> m_notifyingObserversInSet;
62 inline void IdTargetObserverRegistry::notifyObservers(const AtomicString& id)
64 ASSERT(!m_notifyingObserversInSet);
65 if (id.isEmpty() || m_registry.isEmpty())
67 IdTargetObserverRegistry::notifyObserversInternal(id);
70 } // namespace WebCore
72 #endif // IdTargetObserverRegistry_h