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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_BROWSER_POWER_SAVE_BLOCKER_IMPL_H_
      6 #define CONTENT_BROWSER_POWER_SAVE_BLOCKER_IMPL_H_
      7 
      8 #include "base/memory/ref_counted.h"
      9 #include "content/public/browser/power_save_blocker.h"
     10 #include "ui/gfx/native_widget_types.h"
     11 
     12 namespace content {
     13 
     14 class PowerSaveBlockerImpl : public PowerSaveBlocker {
     15  public:
     16   PowerSaveBlockerImpl(PowerSaveBlockerType type, const std::string& reason);
     17   virtual ~PowerSaveBlockerImpl();
     18 
     19 #if defined(OS_ANDROID)
     20   // In Android platform, the kPowerSaveBlockPreventDisplaySleep type of
     21   // PowerSaveBlocker should associated with the ViewAndroid,
     22   // so the blocker could be removed by platform if the view isn't visble
     23   void InitDisplaySleepBlocker(gfx::NativeView view_android);
     24 #endif
     25 
     26  private:
     27   class Delegate;
     28 
     29   // Implementations of this class may need a second object with different
     30   // lifetime than the RAII container, or additional storage. This member is
     31   // here for that purpose. If not used, just define the class as an empty
     32   // RefCounted (or RefCountedThreadSafe) like so to make it compile:
     33   // class PowerSaveBlocker::Delegate
     34   //     : public base::RefCounted<PowerSaveBlocker::Delegate> {
     35   //  private:
     36   //   friend class base::RefCounted<Delegate>;
     37   //   ~Delegate() {}
     38   // };
     39   scoped_refptr<Delegate> delegate_;
     40 
     41   DISALLOW_COPY_AND_ASSIGN(PowerSaveBlockerImpl);
     42 };
     43 
     44 }  // namespace content
     45 
     46 #endif  // CONTENT_BROWSER_POWER_SAVE_BLOCKER_IMPL_H_
     47