/*
* 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:
* * 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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, 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 WheelController_h
#define WheelController_h
#include "core/dom/DocumentSupplementable.h"
#include "core/events/Event.h"
#include "core/frame/DOMWindowLifecycleObserver.h"
namespace WebCore {
class DOMWindow;
class WheelController FINAL : public DocumentSupplement, public DOMWindowLifecycleObserver {
public:
virtual ~WheelController();
static const char* supplementName();
static WheelController* from(Document&);
unsigned wheelEventHandlerCount() { return m_wheelEventHandlerCount; }
void didAddWheelEventHandler(Document&);
void didRemoveWheelEventHandler(Document&);
// Inherited from DOMWindowLifecycleObserver
virtual void didAddEventListener(DOMWindow*, const AtomicString&) OVERRIDE;
virtual void didRemoveEventListener(DOMWindow*, const AtomicString&) OVERRIDE;
private:
explicit WheelController(Document&);
unsigned m_wheelEventHandlerCount;
};
} // namespace WebCore
#endif // WheelController_h