src/chrome/browser/chromeos/power/power_button_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/power_button_observer.h"
   6
   7 #include "ash/shell.h"
   8 #include "ash/system/tray/system_tray_delegate.h"
   9 #include "ash/system/user/login_status.h"
  10 #include "ash/wm/power_button_controller.h"
  11 #include "base/logging.h"
  12 #include "chrome/browser/chrome_notification_types.h"
  13 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
  14 #include "chrome/browser/chromeos/power/session_state_controller_delegate_chromeos.h"
  15 #include "chromeos/dbus/dbus_thread_manager.h"
  16 #include "content/public/browser/notification_service.h"
  17
  18 namespace ash {
  19 class LockStateControllerDelegate;
  20 }
  21
  22 namespace chromeos {
  23
  24 namespace {
  25
  26 ash::user::LoginStatus GetCurrentLoginStatus() {
  27   if (!ash::Shell::GetInstance()->system_tray_delegate())
  28     return ash::user::LOGGED_IN_NONE;
  29   return ash::Shell::GetInstance()->system_tray_delegate()->
  30       GetUserLoginStatus();
  31 }
  32
  33 }  // namespace
  34
  35 PowerButtonObserver::PowerButtonObserver() {
  36   ash::Shell::GetInstance()->lock_state_controller()->
  37       SetDelegate(scoped_ptr<ash::LockStateControllerDelegate>(
  38           new SessionStateControllerDelegateChromeos));
  39
  40   registrar_.Add(
  41       this,
  42       chrome::NOTIFICATION_LOGIN_USER_CHANGED,
  43       content::NotificationService::AllSources());
  44   registrar_.Add(
  45       this,
  46       chrome::NOTIFICATION_APP_TERMINATING,
  47       content::NotificationService::AllSources());
  48   registrar_.Add(
  49       this,
  50       chrome::NOTIFICATION_SCREEN_LOCK_STATE_CHANGED,
  51       content::NotificationService::AllSources());
  52
  53   DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
  54   DBusThreadManager::Get()->GetSessionManagerClient()->AddObserver(this);
  55
  56   // Tell the controller about the initial state.
  57   ash::Shell::GetInstance()->OnLoginStateChanged(GetCurrentLoginStatus());
  58
  59   const ScreenLocker* locker = ScreenLocker::default_screen_locker();
  60   bool locked = locker && locker->locked();
  61   ash::Shell::GetInstance()->OnLockStateChanged(locked);
  62 }
  63
  64 PowerButtonObserver::~PowerButtonObserver() {
  65   DBusThreadManager::Get()->GetSessionManagerClient()->RemoveObserver(this);
  66   DBusThreadManager::Get()->GetPowerManagerClient()->RemoveObserver(this);
  67 }
  68
  69 void PowerButtonObserver::Observe(int type,
  70                                   const content::NotificationSource& source,
  71                                   const content::NotificationDetails& details) {
  72   switch (type) {
  73     case chrome::NOTIFICATION_LOGIN_USER_CHANGED: {
  74       ash::Shell::GetInstance()->OnLoginStateChanged(GetCurrentLoginStatus());
  75       break;
  76     }
  77     case chrome::NOTIFICATION_APP_TERMINATING:
  78       ash::Shell::GetInstance()->OnAppTerminating();
  79       break;
  80     case chrome::NOTIFICATION_SCREEN_LOCK_STATE_CHANGED: {
  81       bool locked = *content::Details<bool>(details).ptr();
  82       ash::Shell::GetInstance()->OnLockStateChanged(locked);
  83       break;
  84     }
  85     default:
  86       NOTREACHED() << "Unexpected notification " << type;
  87   }
  88 }
  89
  90 void PowerButtonObserver::PowerButtonEventReceived(
  91     bool down, const base::TimeTicks& timestamp) {
  92   ash::Shell::GetInstance()->power_button_controller()->
  93       OnPowerButtonEvent(down, timestamp);
  94 }
  95
  96 }  // namespace chromeos