| /* |
| * 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 "platform/heap/Handle.h" |
| #include "wtf/Forward.h" |
| #include "wtf/HashMap.h" |
| #include "wtf/HashSet.h" |
| #include "wtf/text/StringHash.h" |
| |
| namespace blink { |
| |
| class IdTargetObserver; |
| |
| class IdTargetObserverRegistry final : public NoBaseWillBeGarbageCollectedFinalized<IdTargetObserverRegistry> { |
| WTF_MAKE_NONCOPYABLE(IdTargetObserverRegistry); |
| USING_FAST_MALLOC_WILL_BE_REMOVED(IdTargetObserverRegistry); |
| friend class IdTargetObserver; |
| public: |
| static PassOwnPtrWillBeRawPtr<IdTargetObserverRegistry> create(); |
| DECLARE_TRACE(); |
| void notifyObservers(const AtomicString& id); |
| bool hasObservers(const AtomicString& id) const; |
| |
| private: |
| IdTargetObserverRegistry() : m_notifyingObserversInSet(nullptr) { } |
| void addObserver(const AtomicString& id, IdTargetObserver*); |
| void removeObserver(const AtomicString& id, IdTargetObserver*); |
| void notifyObserversInternal(const AtomicString& id); |
| |
| typedef WillBeHeapHashSet<RawPtrWillBeMember<IdTargetObserver>> ObserverSet; |
| typedef WillBeHeapHashMap<StringImpl*, OwnPtrWillBeMember<ObserverSet>> IdToObserverSetMap; |
| IdToObserverSetMap m_registry; |
| RawPtrWillBeMember<ObserverSet> m_notifyingObserversInSet; |
| }; |
| |
| inline void IdTargetObserverRegistry::notifyObservers(const AtomicString& id) |
| { |
| ASSERT(!m_notifyingObserversInSet); |
| if (id.isEmpty() || m_registry.isEmpty()) |
| return; |
| IdTargetObserverRegistry::notifyObserversInternal(id); |
| } |
| |
| } // namespace blink |
| |
| #endif // IdTargetObserverRegistry_h |