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