ui/display/chromeos/update_display_configuration_task.h

   1 // Copyright 2014 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 UI_DISPLAY_CHROMEOS_UPDATE_DISPLAY_CONFIGURATION_TASK_H_
   6 #define UI_DISPLAY_CHROMEOS_UPDATE_DISPLAY_CONFIGURATION_TASK_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/weak_ptr.h"
  11 #include "ui/display/chromeos/configure_displays_task.h"
  12 #include "ui/display/chromeos/display_configurator.h"
  13
  14 namespace ui {
  15
  16 class DisplaySnapshot;
  17 class NativeDisplayDelegate;
  18
  19 class DISPLAY_EXPORT UpdateDisplayConfigurationTask {
  20  public:
  21   typedef base::Callback<void(
  22       bool /* success */,
  23       const std::vector<DisplayConfigurator::DisplayState>& /* displays */,
  24       const gfx::Size& /* framebuffer_size */,
  25       MultipleDisplayState /* new_display_state */,
  26       chromeos::DisplayPowerState /* new_power_state */)> ResponseCallback;
  27
  28   UpdateDisplayConfigurationTask(
  29       NativeDisplayDelegate* delegate,
  30       DisplayConfigurator::DisplayLayoutManager* layout_manager,
  31       MultipleDisplayState new_display_state,
  32       chromeos::DisplayPowerState new_power_state,
  33       int power_flags,
  34       uint32_t background_color_argb,
  35       bool force_configure,
  36       const ResponseCallback& callback);
  37   ~UpdateDisplayConfigurationTask();
  38
  39   void Run();
  40
  41  private:
  42   // Callback to NativeDisplayDelegate::GetDisplays().
  43   void OnDisplaysUpdated(const std::vector<DisplaySnapshot*>& displays);
  44
  45   // Callback to ConfigureDisplaysTask used to process the result of a display
  46   // configuration run.
  47   void OnStateEntered(ConfigureDisplaysTask::Status status);
  48
  49   // If the initial display configuration run failed due to errors entering
  50   // mirror more, another configuration run is executed to enter software
  51   // mirroring. This is the callback used to process the result of that
  52   // configuration.
  53   void OnEnableSoftwareMirroring(ConfigureDisplaysTask::Status status);
  54
  55   // Starts the configuration process. |callback| is used to continue the task
  56   // after |configure_taks_| finishes executing.
  57   void EnterState(const ConfigureDisplaysTask::ResponseCallback& callback);
  58
  59   // Finishes display configuration and runs |callback_|.
  60   void FinishConfiguration(bool success);
  61
  62   // Returns true if the DPMS state should be force to on.
  63   bool ShouldForceDpms() const;
  64
  65   // Returns true if a display configuration is required.
  66   bool ShouldConfigure() const;
  67
  68   // Returns a display state based on the power state.
  69   MultipleDisplayState ChooseDisplayState() const;
  70
  71   NativeDisplayDelegate* delegate_;                            // Not owned.
  72   DisplayConfigurator::DisplayLayoutManager* layout_manager_;  // Not owned.
  73
  74   // Requested display state.
  75   MultipleDisplayState new_display_state_;
  76
  77   // Requested power state.
  78   chromeos::DisplayPowerState new_power_state_;
  79
  80   // Bitwise-or-ed values for the kSetDisplayPower* values defined in
  81   // DisplayConfigurator.
  82   int power_flags_;
  83
  84   uint32_t background_color_argb_;
  85
  86   bool force_configure_;
  87
  88   // Used to signal that the task has finished.
  89   ResponseCallback callback_;
  90
  91   bool force_dpms_;
  92
  93   // List of updated displays.
  94   std::vector<DisplayConfigurator::DisplayState> cached_displays_;
  95
  96   gfx::Size framebuffer_size_;
  97
  98   scoped_ptr<ConfigureDisplaysTask> configure_task_;
  99
 100   base::WeakPtrFactory<UpdateDisplayConfigurationTask> weak_ptr_factory_;
 101
 102   DISALLOW_COPY_AND_ASSIGN(UpdateDisplayConfigurationTask);
 103 };
 104
 105 }  // namespace ui
 106
 107 #endif  // UI_DISPLAY_CHROMEOS_UPDATE_DISPLAY_CONFIGURATION_TASK_H_