/*
* 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 AND ITS 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 APPLE OR ITS 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 DeviceSensorEventController_h
#define DeviceSensorEventController_h
#include "core/events/Event.h"
#include "core/page/PageLifecycleObserver.h"
#include "platform/Timer.h"
namespace WebCore {
class Document;
class DeviceSensorEventController : public PageLifecycleObserver {
public:
void startUpdating();
void stopUpdating();
protected:
explicit DeviceSensorEventController(Document&);
virtual ~DeviceSensorEventController();
void dispatchDeviceEvent(const PassRefPtrWillBeRawPtr<Event>);
virtual bool hasLastData() = 0;
virtual PassRefPtrWillBeRawPtr<Event> getLastEvent() = 0;
virtual void registerWithDispatcher() = 0;
virtual void unregisterWithDispatcher() = 0;
virtual bool isNullEvent(Event*) = 0;
bool m_hasEventListener;
private:
// Inherited from PageLifecycleObserver.
virtual void pageVisibilityChanged() OVERRIDE FINAL;
void fireDeviceEvent(Timer<DeviceSensorEventController>*);
Document& m_document;
bool m_isActive;
bool m_needsCheckingNullEvents;
Timer<DeviceSensorEventController> m_timer;
};
} // namespace WebCore
#endif // DeviceSensorEventController_h