dom/battery/BatteryManager.h
author Wei-Cheng Pan <wpan@mozilla.com>
Thu, 20 Aug 2015 15:39:47 +0800
changeset 291368 c6f579ae99a69318270ecb3f18dd3b9dcdeb594c
parent 272011 bd079aadd3feeee3f9b9f73c5e0bc4bd6a870722
child 291387 5392300058b6866b242fc32da1092c214dfee3b8
permissions -rw-r--r--
Bug 1050749 - Expose BatteryManager via getBattery() returning a Promise r=bz,baku

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_battery_BatteryManager_h
#define mozilla_dom_battery_BatteryManager_h

#include "Types.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "mozilla/Observer.h"
#include "nsCycleCollectionParticipant.h"

class nsPIDOMWindow;

namespace mozilla {

namespace hal {
class BatteryInformation;
} // namespace hal

namespace dom {
namespace battery {

class BatteryManager : public DOMEventTargetHelper
                     , public BatteryObserver
{
public:
  explicit BatteryManager(nsPIDOMWindow* aWindow);

  void Init();
  void Shutdown();

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

  /**
   * WebIDL Interface
   */

  nsPIDOMWindow* GetParentObject() const
  {
     return GetOwner();
  }

  virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;

  bool Charging() const;

  double ChargingTime() const;

  double DischargingTime() const;

  double Level() const;

  IMPL_EVENT_HANDLER(chargingchange)
  IMPL_EVENT_HANDLER(chargingtimechange)
  IMPL_EVENT_HANDLER(dischargingtimechange)
  IMPL_EVENT_HANDLER(levelchange)

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

  double mLevel;
  bool   mCharging;
  /**
   * Represents the discharging time or the charging time, dpending on the
   * current battery status (charging or not).
   */
  double mRemainingTime;
};

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

#endif // mozilla_dom_battery_BatteryManager_h