src/ash/display/projecting_observer_chromeos.cc

   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 #include "ash/display/projecting_observer_chromeos.h"
   6
   7 #include "chromeos/dbus/dbus_thread_manager.h"
   8 #include "chromeos/dbus/power_manager_client.h"
   9 #include "ui/display/types/chromeos/display_snapshot.h"
  10
  11 namespace ash {
  12
  13 ProjectingObserver::ProjectingObserver()
  14     : has_internal_output_(false),
  15       output_count_(0),
  16       casting_session_count_(0) {}
  17
  18 ProjectingObserver::~ProjectingObserver() {}
  19
  20 void ProjectingObserver::OnDisplayModeChanged(
  21     const ui::DisplayConfigurator::DisplayStateList& display_states) {
  22   has_internal_output_ = false;
  23   output_count_ = display_states.size();
  24
  25   for (size_t i = 0; i < display_states.size(); ++i) {
  26     if (display_states[i].display->type() ==
  27         ui::DISPLAY_CONNECTION_TYPE_INTERNAL) {
  28       has_internal_output_ = true;
  29       break;
  30     }
  31   }
  32
  33   SetIsProjecting();
  34 }
  35
  36 void ProjectingObserver::OnCastingSessionStartedOrStopped(bool started) {
  37   if (started) {
  38     ++casting_session_count_;
  39   } else {
  40     DCHECK_GT(casting_session_count_, 0);
  41     --casting_session_count_;
  42     if (casting_session_count_ < 0)
  43       casting_session_count_ = 0;
  44   }
  45
  46   SetIsProjecting();
  47 }
  48
  49 void ProjectingObserver::SetIsProjecting() {
  50   // "Projecting" is defined as having more than 1 output connected while at
  51   // least one of them is an internal output.
  52   bool projecting = has_internal_output_ &&
  53       (output_count_ + casting_session_count_ > 1);
  54
  55   chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->SetIsProjecting(
  56       projecting);
  57 }
  58
  59 }  // namespace ash