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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * Software distributed under the License is distributed on an "AS IS" basis,
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 * for the specific language governing rights and limitations under the
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 * The Original Code is mozilla.org code.
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 * The Initial Developer of the Original Code is Mozilla Foundation
 * Portions created by the Initial Developer are Copyright (C) 2011
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Mounir Lamouri <mounir.lamouri@mozilla.com> (Original Author)
 *
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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#ifndef mozilla_dom_battery_BatteryManager_h
#define mozilla_dom_battery_BatteryManager_h

#include "nsIDOMBatteryManager.h"
#include "nsDOMEventTargetHelper.h"
#include "nsCycleCollectionParticipant.h"
#include "mozilla/Observer.h"
#include "Types.h"

namespace mozilla {

namespace hal {
class BatteryInformation;
} // namespace hal

namespace dom {
namespace battery {

class BatteryManager : public nsIDOMBatteryManager
                     , public nsDOMEventTargetHelper
                     , public BatteryObserver
{
public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSIDOMBATTERYMANAGER
  NS_FORWARD_NSIDOMEVENTTARGET(nsDOMEventTargetHelper::)

  BatteryManager();
  virtual ~BatteryManager();

  void Init();
  void Shutdown();

  // For IObserver.
  void Notify(const hal::BatteryInformation& aBatteryInfo);

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(BatteryManager,
                                           nsDOMEventTargetHelper)

  /**
   * Returns whether the battery api is supported (ie. not disabled by the user)
   * @return whether the battery api is supported.
   */
  static bool HasSupport();


private:
  /**
   * Dispatch a trusted non-cancellable and non-bubbling event to itself.
   */
  nsresult DispatchTrustedEventToSelf(const nsAString& aEventName);

  /**
   * Update the battery information stored in the battery manager object using
   * a battery information object.
   */
  void UpdateFromBatteryInfo(const hal::BatteryInformation& aBatteryInfo);

  float mLevel;
  bool  mCharging;

  nsRefPtr<nsDOMEventListenerWrapper> mOnLevelChangeListener;
  nsRefPtr<nsDOMEventListenerWrapper> mOnChargingChangeListener;
};

} // namespace battery
} // namespace dom
} // namespace mozilla

#endif // mozilla_dom_battery_BatteryManager_h