michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef mozilla_dom_battery_BatteryManager_h
michael@0: #define mozilla_dom_battery_BatteryManager_h
michael@0: 
michael@0: #include "Types.h"
michael@0: #include "mozilla/DOMEventTargetHelper.h"
michael@0: #include "mozilla/Observer.h"
michael@0: #include "nsCycleCollectionParticipant.h"
michael@0: 
michael@0: class nsPIDOMWindow;
michael@0: class nsIScriptContext;
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: namespace hal {
michael@0: class BatteryInformation;
michael@0: } // namespace hal
michael@0: 
michael@0: namespace dom {
michael@0: namespace battery {
michael@0: 
michael@0: class BatteryManager : public DOMEventTargetHelper
michael@0:                      , public BatteryObserver
michael@0: {
michael@0: public:
michael@0:   BatteryManager(nsPIDOMWindow* aWindow);
michael@0: 
michael@0:   void Init();
michael@0:   void Shutdown();
michael@0: 
michael@0:   // For IObserver.
michael@0:   void Notify(const hal::BatteryInformation& aBatteryInfo);
michael@0: 
michael@0:   /**
michael@0:    * Returns whether the battery api is supported (ie. not disabled by the user)
michael@0:    * @return whether the battery api is supported.
michael@0:    */
michael@0:   static bool HasSupport();
michael@0: 
michael@0:   /**
michael@0:    * WebIDL Interface
michael@0:    */
michael@0: 
michael@0:   nsPIDOMWindow* GetParentObject() const
michael@0:   {
michael@0:      return GetOwner();
michael@0:   }
michael@0: 
michael@0:   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
michael@0: 
michael@0:   bool Charging() const
michael@0:   {
michael@0:     return mCharging;
michael@0:   }
michael@0: 
michael@0:   double ChargingTime() const;
michael@0: 
michael@0:   double DischargingTime() const;
michael@0: 
michael@0:   double Level() const
michael@0:   {
michael@0:     return mLevel;
michael@0:   }
michael@0: 
michael@0:   IMPL_EVENT_HANDLER(chargingchange)
michael@0:   IMPL_EVENT_HANDLER(chargingtimechange)
michael@0:   IMPL_EVENT_HANDLER(dischargingtimechange)
michael@0:   IMPL_EVENT_HANDLER(levelchange)
michael@0: 
michael@0: private:
michael@0:   /**
michael@0:    * Update the battery information stored in the battery manager object using
michael@0:    * a battery information object.
michael@0:    */
michael@0:   void UpdateFromBatteryInfo(const hal::BatteryInformation& aBatteryInfo);
michael@0: 
michael@0:   double mLevel;
michael@0:   bool   mCharging;
michael@0:   /**
michael@0:    * Represents the discharging time or the charging time, dpending on the
michael@0:    * current battery status (charging or not).
michael@0:    */
michael@0:   double mRemainingTime;
michael@0: };
michael@0: 
michael@0: } // namespace battery
michael@0: } // namespace dom
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // mozilla_dom_battery_BatteryManager_h