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/accelerators/accelerator_controller.h"
   9 #include "ash/accelerators/accelerator_table.h"
  10 #include "ash/ash_export.h"
  11 #include "ash/wm/session_state_animator.h"
  12 #include "base/basictypes.h"
  13 #include "ui/base/accelerators/accelerator.h"
  14 #include "ui/events/event_handler.h"
  15
  16 #if defined(OS_CHROMEOS)
  17 #include "ui/display/chromeos/display_configurator.h"
  18 #endif
  19
  20 namespace gfx {
  21 class Rect;
  22 class Size;
  23 }
  24
  25 namespace ui {
  26 class Layer;
  27 }
  28
  29 namespace ash {
  30
  31 namespace test {
  32 class PowerButtonControllerTest;
  33 }
  34
  35 class LockStateController;
  36
  37 // Handles power & lock button events which may result in the locking or
  38 // shutting down of the system as well as taking screen shots while in maximize
  39 // mode.
  40 class ASH_EXPORT PowerButtonController : ui::EventHandler
  41 // TODO(derat): Remove these ifdefs after DisplayConfigurator becomes
  42 // cross-platform.
  43 #if defined(OS_CHROMEOS)
  44       , public ui::DisplayConfigurator::Observer
  45 #endif
  46       {
  47  public:
  48   explicit PowerButtonController(LockStateController* controller);
  49   ~PowerButtonController() override;
  50
  51   void set_has_legacy_power_button_for_test(bool legacy) {
  52     has_legacy_power_button_ = legacy;
  53   }
  54
  55   void set_enable_quick_lock_for_test(bool enable_quick_lock) {
  56     enable_quick_lock_ = enable_quick_lock;
  57   }
  58
  59   // Called when the current screen brightness changes.
  60   void OnScreenBrightnessChanged(double percent);
  61
  62   // Called when the power or lock buttons are pressed or released.
  63   void OnPowerButtonEvent(bool down, const base::TimeTicks& timestamp);
  64   void OnLockButtonEvent(bool down, const base::TimeTicks& timestamp);
  65
  66   // ui::EventHandler:
  67   void OnKeyEvent(ui::KeyEvent* event) override;
  68
  69 #if defined(OS_CHROMEOS)
  70   // Overriden from ui::DisplayConfigurator::Observer:
  71   void OnDisplayModeChanged(
  72       const ui::DisplayConfigurator::DisplayStateList& outputs) override;
  73 #endif
  74
  75  private:
  76   friend class test::PowerButtonControllerTest;
  77
  78   // Are the power or lock buttons currently held?
  79   bool power_button_down_;
  80   bool lock_button_down_;
  81
  82   // True when the volume down button is being held down.
  83   bool volume_down_pressed_;
  84
  85   // Has the screen brightness been reduced to 0%?
  86   bool brightness_is_zero_;
  87
  88   // True if an internal display is off while an external display is on (e.g.
  89   // for Chrome OS's docked mode, where a Chromebook's lid is closed while an
  90   // external display is connected).
  91   bool internal_display_off_and_external_display_on_;
  92
  93   // Was a command-line switch set telling us that we're running on hardware
  94   // that misreports power button releases?
  95   bool has_legacy_power_button_;
  96
  97   // Enables quick, non-cancellable locking of the screen when in maximize mode.
  98   bool enable_quick_lock_;
  99
 100   LockStateController* controller_;  // Not owned.
 101
 102   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
 103 };
 104
 105 }  // namespace ash
 106
 107 #endif  // ASH_WM_POWER_BUTTON_CONTROLLER_H_