src/ash/display/display_change_observer_chromeos.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_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
   6 #define ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/shell_observer.h"
  10 #include "base/basictypes.h"
  11 #include "chromeos/display/output_configurator.h"
  12
  13 namespace ash {
  14 namespace internal {
  15
  16 struct Resolution;
  17
  18 // An object that observes changes in display configuration and
  19 // update DisplayManagers.
  20 class DisplayChangeObserver
  21     : public chromeos::OutputConfigurator::StateController,
  22       public chromeos::OutputConfigurator::Observer,
  23       public ShellObserver {
  24  public:
  25   // Returns true if the size info in the output_info isn't valid
  26   // and should be ignored. This is exposed for testing.
  27   // |mm_width| and |mm_height| are given in millimeters.
  28   ASH_EXPORT static bool ShouldIgnoreSize(unsigned long mm_width,
  29                                           unsigned long mm_height);
  30
  31   // Returns the resolution list.
  32   ASH_EXPORT static std::vector<Resolution> GetResolutionList(
  33       const chromeos::OutputConfigurator::OutputSnapshot& output);
  34
  35   DisplayChangeObserver();
  36   virtual ~DisplayChangeObserver();
  37
  38   // chromeos::OutputConfigurator::StateController overrides:
  39   virtual chromeos::OutputState GetStateForDisplayIds(
  40       const std::vector<int64>& outputs) const OVERRIDE;
  41   virtual bool GetResolutionForDisplayId(int64 display_id,
  42                                          int* width,
  43                                          int* height) const OVERRIDE;
  44
  45   // Overriden from chromeos::OutputConfigurator::Observer:
  46   virtual void OnDisplayModeChanged(
  47       const std::vector<chromeos::OutputConfigurator::OutputSnapshot>& outputs)
  48       OVERRIDE;
  49
  50   // Overriden from ShellObserver:
  51   virtual void OnAppTerminating() OVERRIDE;
  52
  53  private:
  54   DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserver);
  55 };
  56
  57 }  // namespace internal
  58 }  // namespace ash
  59
  60 #endif  // ASH_DISPLAY_AURA_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H