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