chrome/browser/chromeos/power/brightness_observer.cc

   1 // Copyright (c) 2012 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 "chrome/browser/chromeos/power/brightness_observer.h"
   6
   7 #include "ash/shell.h"
   8 #include "ash/wm/power_button_controller.h"
   9 #include "chrome/browser/chromeos/login/user_manager.h"
  10 #include "chrome/browser/extensions/api/system_private/system_private_api.h"
  11 #include "chrome/browser/lifetime/application_lifetime.h"
  12 #include "chromeos/dbus/dbus_thread_manager.h"
  13
  14 namespace chromeos {
  15
  16 BrightnessObserver::BrightnessObserver() {
  17   DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
  18 }
  19
  20 BrightnessObserver::~BrightnessObserver() {
  21   DBusThreadManager::Get()->GetPowerManagerClient()->RemoveObserver(this);
  22 }
  23
  24 void BrightnessObserver::BrightnessChanged(int level, bool user_initiated) {
  25   extensions::DispatchBrightnessChangedEvent(level, user_initiated);
  26   ash::Shell::GetInstance()->power_button_controller()->
  27       OnScreenBrightnessChanged(static_cast<double>(level));
  28
  29   // When the user is idle, the power manager dims the screen, turns off the
  30   // screen and eventually locks the screen (if screen lock on idle and suspend
  31   // is enabled). For Public Accounts, the session should be terminated instead
  32   // as soon as the screen turns off.
  33   // This implementation will be superseded after a revamp of the power manager
  34   // is complete, see crbug.com/161267.
  35   if (UserManager::Get()->IsLoggedInAsPublicAccount() &&
  36       !level && !user_initiated) {
  37     chrome::AttemptUserExit();
  38   }
  39 }
  40
  41 }  // namespace chromeos