ash/display/projecting_observer_chromeos.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 ASH_DISPLAY_PROJECTING_OBSERVER_CHROMEOS_H_
   6 #define ASH_DISPLAY_PROJECTING_OBSERVER_CHROMEOS_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/shell_observer.h"
  10 #include "ui/display/chromeos/display_configurator.h"
  11
  12 namespace chromeos {
  13 class PowerManagerClient;
  14 }
  15
  16 namespace ash {
  17
  18 class ASH_EXPORT ProjectingObserver : public ui::DisplayConfigurator::Observer,
  19                                       public ShellObserver {
  20  public:
  21   // |power_manager_client| must outlive this object.
  22   explicit ProjectingObserver(
  23       chromeos::PowerManagerClient* power_manager_client);
  24   ~ProjectingObserver() override;
  25
  26   // DisplayConfigurator::Observer implementation:
  27   void OnDisplayModeChanged(
  28       const ui::DisplayConfigurator::DisplayStateList& outputs) override;
  29
  30   // ash::ShellObserver implementation:
  31   void OnCastingSessionStartedOrStopped(bool started) override;
  32
  33  private:
  34   // Sends the current projecting state to power manager.
  35   void SetIsProjecting();
  36
  37   // True if at least one output is internal. This value is updated when
  38   // |OnDisplayModeChanged| is called.
  39   bool has_internal_output_;
  40
  41   // Keeps track of the number of connected outputs.
  42   int output_count_;
  43
  44   // Number of outstanding casting sessions.
  45   int casting_session_count_;
  46
  47   // Weak pointer to the DBusClient PowerManagerClient;
  48   chromeos::PowerManagerClient* power_manager_client_;
  49
  50   DISALLOW_COPY_AND_ASSIGN(ProjectingObserver);
  51 };
  52
  53 }  // namespace ash
  54
  55 #endif  // ASH_DISPLAY_PROJECTING_OBSERVER_CHROMEOS_H_