/*
* Copyright (C) 2010 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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,
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ScopedEventQueue_h
#define ScopedEventQueue_h
#include "wtf/Noncopyable.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefPtr.h"
#include "wtf/Vector.h"
namespace WebCore {
class EventDispatchMediator;
class ScopedEventQueue {
WTF_MAKE_NONCOPYABLE(ScopedEventQueue); WTF_MAKE_FAST_ALLOCATED;
public:
~ScopedEventQueue();
void enqueueEventDispatchMediator(PassRefPtr<EventDispatchMediator>);
void dispatchAllEvents();
static ScopedEventQueue* instance();
void incrementScopingLevel();
void decrementScopingLevel();
private:
ScopedEventQueue();
static void initialize();
void dispatchEvent(PassRefPtr<EventDispatchMediator>) const;
Vector<RefPtr<EventDispatchMediator> > m_queuedEventDispatchMediators;
unsigned m_scopingLevel;
static ScopedEventQueue* s_instance;
};
class EventQueueScope {
WTF_MAKE_NONCOPYABLE(EventQueueScope);
public:
EventQueueScope() { ScopedEventQueue::instance()->incrementScopingLevel(); }
~EventQueueScope() { ScopedEventQueue::instance()->decrementScopingLevel(); }
};
}
#endif // ScopedEventQueue_h