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 "base/bind.h"
   9 #include "base/lazy_instance.h"
  10 #include "base/logging.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "chrome/browser/chrome_notification_types.h"
  13 #include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.h"
  14 #include "chrome/browser/chromeos/ui/idle_logout_dialog_view.h"
  15 #include "components/user_manager/user_manager.h"
  16 #include "content/public/browser/notification_observer.h"
  17 #include "content/public/browser/notification_registrar.h"
  18 #include "content/public/browser/notification_service.h"
  19 #include "ui/wm/core/user_activity_detector.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   wm::UserActivityDetector* user_activity_detector =
  46       wm::UserActivityDetector::Get();
  47   if (user_activity_detector && user_activity_detector->HasObserver(this))
  48     user_activity_detector->RemoveObserver(this);
  49 }
  50
  51 void KioskModeIdleLogout::Setup() {
  52   if (user_manager::UserManager::Get()->IsLoggedInAsDemoUser()) {
  53     // This means that we're recovering from a crash.  The user is already
  54     // logged in, so go ahead and start the timer.
  55     Start();
  56   } else {
  57     registrar_.Add(this, chrome::NOTIFICATION_LOGIN_USER_CHANGED,
  58                    content::NotificationService::AllSources());
  59   }
  60 }
  61
  62 void KioskModeIdleLogout::Observe(
  63     int type,
  64     const content::NotificationSource& source,
  65     const content::NotificationDetails& details) {
  66   if (type == chrome::NOTIFICATION_LOGIN_USER_CHANGED) {
  67     Start();
  68     registrar_.RemoveAll();
  69   }
  70 }
  71
  72 void KioskModeIdleLogout::OnUserActivity(const ui::Event* event) {
  73   IdleLogoutDialogView::CloseDialog();
  74   ResetTimer();
  75 }
  76
  77 void KioskModeIdleLogout::Start() {
  78   if (!wm::UserActivityDetector::Get()->HasObserver(this))
  79     wm::UserActivityDetector::Get()->AddObserver(this);
  80   ResetTimer();
  81 }
  82
  83 void KioskModeIdleLogout::ResetTimer() {
  84   if (timer_.IsRunning()) {
  85     timer_.Reset();
  86   } else {
  87     // OneShotTimer destroys the posted task after running it, so Reset()
  88     // isn't safe to call on a timer that's already fired.
  89     timer_.Start(FROM_HERE, KioskModeSettings::Get()->GetIdleLogoutTimeout(),
  90                  base::Bind(&KioskModeIdleLogout::OnTimeout,
  91                             base::Unretained(this)));
  92   }
  93 }
  94
  95 void KioskModeIdleLogout::OnTimeout() {
  96   IdleLogoutDialogView::ShowDialog();
  97 }
  98
  99 }  // namespace chromeos