ash/system/chromeos/power/power_event_observer.h

   1 // Copyright 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 ASH_SYSTEM_CHROMEOS_POWER_POWER_EVENT_OBSERVER_H_
   6 #define ASH_SYSTEM_CHROMEOS_POWER_POWER_EVENT_OBSERVER_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "base/basictypes.h"
  10 #include "base/callback.h"
  11 #include "base/compiler_specific.h"
  12 #include "chromeos/dbus/power_manager_client.h"
  13 #include "chromeos/dbus/session_manager_client.h"
  14
  15 namespace ash {
  16
  17 // A class that observes power-management-related events.
  18 class ASH_EXPORT PowerEventObserver
  19     : public chromeos::PowerManagerClient::Observer,
  20       public chromeos::SessionManagerClient::Observer {
  21  public:
  22   // This class registers/unregisters itself as an observer in ctor/dtor.
  23   PowerEventObserver();
  24   ~PowerEventObserver() override;
  25
  26   // Called by the WebUIScreenLocker when all the lock screen animations have
  27   // completed.  This really should be implemented via an observer but since
  28   // ash/ isn't allowed to depend on chrome/ we need to have the
  29   // WebUIScreenLocker reach into ash::Shell to make this call.
  30   void OnLockAnimationsComplete();
  31
  32   // chromeos::PowerManagerClient::Observer overrides:
  33   void BrightnessChanged(int level, bool user_initiated) override;
  34   void SuspendImminent() override;
  35   void SuspendDone(const base::TimeDelta& sleep_duration) override;
  36
  37   // chromeos::SessionManagerClient::Observer overrides.
  38   void ScreenIsLocked() override;
  39   void ScreenIsUnlocked() override;
  40
  41   // Is the screen currently locked?
  42   bool screen_locked_;
  43
  44   // Have the lock screen animations completed?
  45   bool waiting_for_lock_screen_animations_;
  46
  47   // If set, called when the lock screen animations have completed to confirm
  48   // that the system is ready to be suspended.
  49   base::Closure screen_lock_callback_;
  50
  51  private:
  52   DISALLOW_COPY_AND_ASSIGN(PowerEventObserver);
  53 };
  54
  55 }  // namespace chromeos
  56
  57 #endif  // ASH_SYSTEM_CHROMEOS_POWER_POWER_EVENT_OBSERVER_H_