chrome/browser/chromeos/kiosk_mode/kiosk_mode_idle_logout.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/kiosk_mode/kiosk_mode_idle_logout.h"
   6
   7 #include "ash/shell.h"
   8 #include "ash/wm/user_activity_detector.h"
   9 #include "base/bind.h"
  10 #include "base/lazy_instance.h"
  11 #include "base/logging.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "chrome/browser/chrome_notification_types.h"
  14 #include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.h"
  15 #include "chrome/browser/chromeos/login/user_manager.h"
  16 #include "chrome/browser/chromeos/ui/idle_logout_dialog_view.h"
  17 #include "content/public/browser/notification_observer.h"
  18 #include "content/public/browser/notification_registrar.h"
  19 #include "content/public/browser/notification_service.h"
  20
  21 namespace chromeos {
  22
  23 namespace {
  24
  25 static base::LazyInstance<KioskModeIdleLogout>
  26     g_kiosk_mode_idle_logout = LAZY_INSTANCE_INITIALIZER;
  27
  28 }  // namespace
  29
  30 // static
  31 void KioskModeIdleLogout::Initialize() {
  32   g_kiosk_mode_idle_logout.Get();
  33 }
  34
  35 KioskModeIdleLogout::KioskModeIdleLogout() {
  36   if (KioskModeSettings::Get()->is_initialized()) {
  37     Setup();
  38   } else {
  39     KioskModeSettings::Get()->Initialize(base::Bind(&KioskModeIdleLogout::Setup,
  40                                                     base::Unretained(this)));
  41   }
  42 }
  43
  44 KioskModeIdleLogout::~KioskModeIdleLogout() {
  45   if (ash::Shell::HasInstance() &&
  46       ash::Shell::GetInstance()->user_activity_detector()->HasObserver(this))
  47     ash::Shell::GetInstance()->user_activity_detector()->RemoveObserver(this);
  48 }
  49
  50 void KioskModeIdleLogout::Setup() {
  51   if (UserManager::Get()->IsLoggedInAsDemoUser()) {
  52     // This means that we're recovering from a crash.  The user is already
  53     // logged in, so go ahead and start the timer.
  54     Start();
  55   } else {
  56     registrar_.Add(this, chrome::NOTIFICATION_LOGIN_USER_CHANGED,
  57                    content::NotificationService::AllSources());
  58   }
  59 }
  60
  61 void KioskModeIdleLogout::Observe(
  62     int type,
  63     const content::NotificationSource& source,
  64     const content::NotificationDetails& details) {
  65   if (type == chrome::NOTIFICATION_LOGIN_USER_CHANGED) {
  66     Start();
  67     registrar_.RemoveAll();
  68   }
  69 }
  70
  71 void KioskModeIdleLogout::OnUserActivity(const ui::Event* event) {
  72   IdleLogoutDialogView::CloseDialog();
  73   ResetTimer();
  74 }
  75
  76 void KioskModeIdleLogout::Start() {
  77   if (!ash::Shell::GetInstance()->user_activity_detector()->HasObserver(this))
  78     ash::Shell::GetInstance()->user_activity_detector()->AddObserver(this);
  79   ResetTimer();
  80 }
  81
  82 void KioskModeIdleLogout::ResetTimer() {
  83   if (timer_.IsRunning()) {
  84     timer_.Reset();
  85   } else {
  86     // OneShotTimer destroys the posted task after running it, so Reset()
  87     // isn't safe to call on a timer that's already fired.
  88     timer_.Start(FROM_HERE, KioskModeSettings::Get()->GetIdleLogoutTimeout(),
  89                  base::Bind(&KioskModeIdleLogout::OnTimeout,
  90                             base::Unretained(this)));
  91   }
  92 }
  93
  94 void KioskModeIdleLogout::OnTimeout() {
  95   IdleLogoutDialogView::ShowDialog();
  96 }
  97
  98 }  // namespace chromeos