Source/WebCore/Modules/battery/BatteryManager.h

/*
 *  Copyright (C) 2012 Samsung Electronics
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 */

#ifndef BatteryManager_h
#define BatteryManager_h

#if ENABLE(BATTERY_STATUS)

#include "ActiveDOMObject.h"
#include "BatteryStatus.h"
#include "EventTarget.h"

namespace WebCore {

class BatteryController;
class Navigator;
class ScriptExecutionContext;

class BatteryManager : public ActiveDOMObject, public RefCounted<BatteryManager>, public EventTarget {
public:
    virtual ~BatteryManager();
    static PassRefPtr<BatteryManager> create(ScriptExecutionContext*, Navigator*);

    // EventTarget implementation.
    virtual const WTF::AtomicString& interfaceName() const { return eventNames().interfaceForBatteryManager; }
    virtual ScriptExecutionContext* scriptExecutionContext() const { return ActiveDOMObject::scriptExecutionContext(); }

    bool charging();
    double chargingTime();
    double dischargingTime();
    double level();

    DEFINE_ATTRIBUTE_EVENT_LISTENER(chargingchange);
    DEFINE_ATTRIBUTE_EVENT_LISTENER(chargingtimechange);
    DEFINE_ATTRIBUTE_EVENT_LISTENER(dischargingtimechange);
    DEFINE_ATTRIBUTE_EVENT_LISTENER(levelchange);

    void didChangeBatteryStatus(PassRefPtr<Event>, PassRefPtr<BatteryStatus>);
    void batteryControllerDestroyed() { m_batteryController = 0; }

    using RefCounted<BatteryManager>::ref;
    using RefCounted<BatteryManager>::deref;

    // ActiveDOMObject implementation.
    virtual bool canSuspend() const { return true; }
    virtual void suspend(ReasonForSuspension);
    virtual void resume();
    virtual void stop();

protected:
    virtual EventTargetData* eventTargetData() { return &m_eventTargetData; }
    virtual EventTargetData* ensureEventTargetData() { return &m_eventTargetData; }

private:
    BatteryManager(ScriptExecutionContext*, Navigator*);

    // EventTarget implementation.
    virtual void refEventTarget() { ref(); }
    virtual void derefEventTarget() { deref(); }

    BatteryController* m_batteryController;
    EventTargetData m_eventTargetData;
    RefPtr<BatteryStatus> m_batteryStatus;
};

}

#endif // BATTERY_STATUS
#endif // BatteryManager_h