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/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
* Copyright (C) 2013 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 COMPUTER, 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 COMPUTER, 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 ContextLifecycleNotifier_h
#define ContextLifecycleNotifier_h
#include "core/dom/ActiveDOMObject.h"
#include "core/platform/LifecycleNotifier.h"
#include "wtf/HashSet.h"
#include "wtf/PassOwnPtr.h"
namespace WebCore {
class ActiveDOMObject;
class ContextLifecycleObserver;
class ScriptExecutionContext;
class ContextLifecycleNotifier : public LifecycleNotifier {
public:
static PassOwnPtr<ContextLifecycleNotifier> create(ScriptExecutionContext*);
virtual ~ContextLifecycleNotifier();
typedef HashSet<ActiveDOMObject*> ActiveDOMObjectSet;
const ActiveDOMObjectSet& activeDOMObjects() const { return m_activeDOMObjects; }
virtual void addObserver(LifecycleObserver*, LifecycleObserver::Type) OVERRIDE;
virtual void removeObserver(LifecycleObserver*, LifecycleObserver::Type) OVERRIDE;
void notifyResumingActiveDOMObjects();
void notifySuspendingActiveDOMObjects(ActiveDOMObject::ReasonForSuspension);
void notifyStoppingActiveDOMObjects();
bool contains(ActiveDOMObject* object) const { return m_activeDOMObjects.contains(object); }
bool canSuspendActiveDOMObjects();
bool hasPendingActivity() const;
protected:
explicit ContextLifecycleNotifier(ScriptExecutionContext*);
private:
ActiveDOMObjectSet m_activeDOMObjects;
};
inline PassOwnPtr<ContextLifecycleNotifier> ContextLifecycleNotifier::create(ScriptExecutionContext* context)
{
return adoptPtr(new ContextLifecycleNotifier(context));
}
} // namespace WebCore
#endif // ContextLifecycleNotifier_h
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