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      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   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 (user_manager::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
     99