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295f920116
I wrote a script to do this which is attached to the bug. TBR=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/736373003
117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
/*
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* Copyright (C) 2008 Apple Inc. All Rights Reserved.
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* Copyright (C) 2013 Google Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef SKY_ENGINE_PLATFORM_LIFECYCLENOTIFIER_H_
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#define SKY_ENGINE_PLATFORM_LIFECYCLENOTIFIER_H_
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#include "sky/engine/platform/LifecycleObserver.h"
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#include "sky/engine/wtf/HashSet.h"
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#include "sky/engine/wtf/PassOwnPtr.h"
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#include "sky/engine/wtf/TemporaryChange.h"
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namespace blink {
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template<typename T>
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class LifecycleNotifier {
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public:
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typedef LifecycleObserver<T> Observer;
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typedef T Context;
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static PassOwnPtr<LifecycleNotifier> create(Context* context)
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{
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return adoptPtr(new LifecycleNotifier(context));
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}
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virtual ~LifecycleNotifier();
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// FIXME: this won't need to be virtual anymore.
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virtual void addObserver(Observer*);
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virtual void removeObserver(Observer*);
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bool isIteratingOverObservers() const { return m_iterating != IteratingNone; }
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protected:
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explicit LifecycleNotifier(Context* context)
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: m_iterating(IteratingNone)
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, m_context(context)
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{
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}
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Context* context() const { return m_context; }
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enum IterationType {
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IteratingNone,
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IteratingOverAll,
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IteratingOverActiveDOMObjects,
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IteratingOverContextObservers,
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IteratingOverDocumentObservers,
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IteratingOverPageObservers,
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IteratingOverDOMWindowObservers
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};
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IterationType m_iterating;
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private:
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typedef HashSet<Observer*> ObserverSet;
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ObserverSet m_observers;
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Context* m_context;
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};
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template<typename T>
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inline LifecycleNotifier<T>::~LifecycleNotifier()
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{
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TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverAll);
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for (typename ObserverSet::iterator it = m_observers.begin(); it != m_observers.end(); it = m_observers.begin()) {
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Observer* observer = *it;
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m_observers.remove(observer);
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ASSERT(observer->lifecycleContext() == m_context);
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observer->contextDestroyed();
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}
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}
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template<typename T>
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inline void LifecycleNotifier<T>::addObserver(typename LifecycleNotifier<T>::Observer* observer)
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{
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RELEASE_ASSERT(m_iterating != IteratingOverAll);
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m_observers.add(observer);
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}
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template<typename T>
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inline void LifecycleNotifier<T>::removeObserver(typename LifecycleNotifier<T>::Observer* observer)
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{
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RELEASE_ASSERT(m_iterating != IteratingOverAll);
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m_observers.remove(observer);
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}
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} // namespace blink
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#endif // SKY_ENGINE_PLATFORM_LIFECYCLENOTIFIER_H_
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