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       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : #ifndef mozilla_dom_power_PowerManagerService_h
       7             : #define mozilla_dom_power_PowerManagerService_h
       8             : 
       9             : #include "nsCOMPtr.h"
      10             : #include "nsDataHashtable.h"
      11             : #include "nsHashKeys.h"
      12             : #include "nsTArray.h"
      13             : #include "nsIDOMWakeLockListener.h"
      14             : #include "nsIPowerManagerService.h"
      15             : #include "mozilla/Observer.h"
      16             : #include "Types.h"
      17             : #include "mozilla/StaticPtr.h"
      18             : #include "mozilla/dom/WakeLock.h"
      19             : 
      20             : namespace mozilla {
      21             : namespace dom {
      22             : 
      23             : class ContentParent;
      24             : 
      25             : namespace power {
      26             : 
      27             : class PowerManagerService
      28             :   : public nsIPowerManagerService
      29             :   , public WakeLockObserver
      30             : {
      31             : public:
      32             :   NS_DECL_ISUPPORTS
      33             :   NS_DECL_NSIPOWERMANAGERSERVICE
      34             : 
      35           1 :   PowerManagerService()
      36           1 :     : mWatchdogTimeoutSecs(0)
      37           1 :   {}
      38             : 
      39             :   static already_AddRefed<PowerManagerService> GetInstance();
      40             : 
      41             :   void Init();
      42             : 
      43             :   // Implement WakeLockObserver
      44             :   void Notify(const hal::WakeLockInformation& aWakeLockInfo) override;
      45             : 
      46             :   /**
      47             :    * Acquire a wake lock on behalf of a given process (aContentParent).
      48             :    *
      49             :    * This method stands in contrast to nsIPowerManagerService::NewWakeLock,
      50             :    * which acquires a wake lock on behalf of the /current/ process.
      51             :    *
      52             :    * NewWakeLockOnBehalfOfProcess is different from NewWakeLock in that
      53             :    *
      54             :    *  - The wake lock unlocks itself if the /given/ process dies, and
      55             :    *  - The /given/ process shows up in WakeLockInfo::lockingProcesses.
      56             :    *
      57             :    */
      58             :   already_AddRefed<WakeLock>
      59             :   NewWakeLockOnBehalfOfProcess(const nsAString& aTopic,
      60             :                                ContentParent* aContentParent);
      61             : 
      62             :   already_AddRefed<WakeLock>
      63             :   NewWakeLock(const nsAString& aTopic, nsPIDOMWindowInner* aWindow,
      64             :               mozilla::ErrorResult& aRv);
      65             : 
      66             : private:
      67             : 
      68             :   ~PowerManagerService();
      69             : 
      70             :   void ComputeWakeLockState(const hal::WakeLockInformation& aWakeLockInfo,
      71             :                             nsAString &aState);
      72             : 
      73             :   void SyncProfile();
      74             : 
      75             :   static StaticRefPtr<PowerManagerService> sSingleton;
      76             : 
      77             :   nsTArray<nsCOMPtr<nsIDOMMozWakeLockListener>> mWakeLockListeners;
      78             : 
      79             :   int32_t mWatchdogTimeoutSecs;
      80             : };
      81             : 
      82             : } // namespace power
      83             : } // namespace dom
      84             : } // namespace mozilla
      85             : 
      86             : #endif // mozilla_dom_power_PowerManagerService_h