ash/wm/power_button_controller.h

   1 // Copyright (c) 2012 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_WM_POWER_BUTTON_CONTROLLER_H_
   6 #define ASH_WM_POWER_BUTTON_CONTROLLER_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/wm/session_state_animator.h"
  10 #include "base/basictypes.h"
  11
  12 #if defined(OS_CHROMEOS) && defined(USE_X11)
  13 #include "chromeos/display/output_configurator.h"
  14 #endif
  15
  16 namespace gfx {
  17 class Rect;
  18 class Size;
  19 }
  20
  21 namespace ui {
  22 class Layer;
  23 }
  24
  25 namespace ash {
  26
  27 namespace test {
  28 class PowerButtonControllerTest;
  29 }
  30
  31 class LockStateController;
  32
  33 // Displays onscreen animations and locks or suspends the system in response to
  34 // the power button being pressed or released.
  35 class ASH_EXPORT PowerButtonController
  36 // TODO(derat): Remove these ifdefs after OutputConfigurator becomes
  37 // cross-platform.
  38 #if defined(OS_CHROMEOS) && defined(USE_X11)
  39     : public chromeos::OutputConfigurator::Observer
  40 #endif
  41     {
  42  public:
  43   explicit PowerButtonController(LockStateController* controller);
  44   virtual ~PowerButtonController();
  45
  46   void set_has_legacy_power_button_for_test(bool legacy) {
  47     has_legacy_power_button_ = legacy;
  48   }
  49
  50   // Called when the current screen brightness changes.
  51   void OnScreenBrightnessChanged(double percent);
  52
  53   // Called when the power or lock buttons are pressed or released.
  54   void OnPowerButtonEvent(bool down, const base::TimeTicks& timestamp);
  55   void OnLockButtonEvent(bool down, const base::TimeTicks& timestamp);
  56
  57 #if defined(OS_CHROMEOS) && defined(USE_X11)
  58   // Overriden from chromeos::OutputConfigurator::Observer:
  59   virtual void OnDisplayModeChanged(
  60       const std::vector<chromeos::OutputConfigurator::OutputSnapshot>& outputs)
  61       OVERRIDE;
  62 #endif
  63
  64  private:
  65   friend class test::PowerButtonControllerTest;
  66
  67   // Are the power or lock buttons currently held?
  68   bool power_button_down_;
  69   bool lock_button_down_;
  70
  71   // Has the screen brightness been reduced to 0%?
  72   bool brightness_is_zero_;
  73
  74   // True if an internal display is off while an external display is on (e.g.
  75   // for Chrome OS's docked mode, where a Chromebook's lid is closed while an
  76   // external display is connected).
  77   bool internal_display_off_and_external_display_on_;
  78
  79   // Was a command-line switch set telling us that we're running on hardware
  80   // that misreports power button releases?
  81   bool has_legacy_power_button_;
  82
  83   LockStateController* controller_; // Not owned.
  84
  85   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
  86 };
  87
  88 }  // namespace ash
  89
  90 #endif  // ASH_WM_POWER_BUTTON_CONTROLLER_H_