Add device policy to disallow shutdown - ash UI modifications

ash/system/date/date_default_view.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/system/date/date_default_view.h"
 
 #include "ash/metrics/user_metrics_recorder.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/system/date/date_view.h"
@@ skipping 12 matching lines @@
 
 namespace {
 
 const int kPaddingVertical = 19;
 
 }  // namespace
 
 namespace ash {
 
 DateDefaultView::DateDefaultView(ash::user::LoginStatus login)
-    : help_(NULL),
-      shutdown_(NULL),
-      lock_(NULL),
-      date_view_(NULL) {
+    : help_button_(NULL),
+      shutdown_button_(NULL),
+      lock_button_(NULL),
+      date_view_(NULL),
+      weak_factory_(this) {
   SetLayoutManager(new views::FillLayout);
 
   date_view_ = new tray::DateView();
   date_view_->SetBorder(views::Border::CreateEmptyBorder(
       kPaddingVertical, ash::kTrayPopupPaddingHorizontal, 0, 0));
   SpecialPopupRow* view = new SpecialPopupRow();
   view->SetContent(date_view_);
   AddChildView(view);
 
   bool userAddingRunning = ash::Shell::GetInstance()
                                ->session_state_delegate()
                                ->IsInSecondaryLoginScreen();
 
   if (login == user::LOGGED_IN_LOCKED ||
       login == user::LOGGED_IN_NONE || userAddingRunning)
     return;
 
   date_view_->SetAction(TrayDate::SHOW_DATE_SETTINGS);
 
-  help_ = new TrayPopupHeaderButton(this,
+  help_button_ = new TrayPopupHeaderButton(this,
                                     IDR_AURA_UBER_TRAY_HELP,
                                     IDR_AURA_UBER_TRAY_HELP,
                                     IDR_AURA_UBER_TRAY_HELP_HOVER,
                                     IDR_AURA_UBER_TRAY_HELP_HOVER,
                                     IDS_ASH_STATUS_TRAY_HELP);
-  help_->SetTooltipText(l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_HELP));
-  view->AddButton(help_);
+  help_button_->SetTooltipText(
+      l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_HELP));
+  view->AddButton(help_button_);
 
 #if !defined(OS_WIN)
   if (login != ash::user::LOGGED_IN_LOCKED) {
-    shutdown_ = new TrayPopupHeaderButton(this,
+    shutdown_button_ = new TrayPopupHeaderButton(this,
                                           IDR_AURA_UBER_TRAY_SHUTDOWN,
                                           IDR_AURA_UBER_TRAY_SHUTDOWN,
                                           IDR_AURA_UBER_TRAY_SHUTDOWN_HOVER,
                                           IDR_AURA_UBER_TRAY_SHUTDOWN_HOVER,
                                           IDS_ASH_STATUS_TRAY_SHUTDOWN);
-    shutdown_->SetTooltipText(
+    shutdown_button_->SetTooltipText(
         l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_SHUTDOWN));
-    view->AddButton(shutdown_);
+    view->AddButton(shutdown_button_);
   }
 
   if (ash::Shell::GetInstance()->session_state_delegate()->CanLockScreen()) {
-    lock_ = new TrayPopupHeaderButton(this,
+    lock_button_ = new TrayPopupHeaderButton(this,
                                       IDR_AURA_UBER_TRAY_LOCKSCREEN,
                                       IDR_AURA_UBER_TRAY_LOCKSCREEN,
                                       IDR_AURA_UBER_TRAY_LOCKSCREEN_HOVER,
                                       IDR_AURA_UBER_TRAY_LOCKSCREEN_HOVER,
                                       IDS_ASH_STATUS_TRAY_LOCK);
-    lock_->SetTooltipText(l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_LOCK));
-    view->AddButton(lock_);
+    lock_button_->SetTooltipText(
+        l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_LOCK));
+    view->AddButton(lock_button_);
   }
+  SystemTrayDelegate* system_tray_delegate =
+      Shell::GetInstance()->system_tray_delegate();
+  system_tray_delegate->AddShutdownPolicyObserver(this);
+  system_tray_delegate->ShouldRebootOnShutdown(base::Bind(
+      &DateDefaultView::OnShutdownPolicyChanged, weak_factory_.GetWeakPtr()));
 #endif  // !defined(OS_WIN)
 }
 
 DateDefaultView::~DateDefaultView() {
+  // We need the check as on shell destruction, the delegate is destroyed first.
+  SystemTrayDelegate* system_tray_delegate =
+      Shell::GetInstance()->system_tray_delegate();
+  if (system_tray_delegate)
+    system_tray_delegate->RemoveShutdownPolicyObserver(this);
 }
 
 views::View* DateDefaultView::GetHelpButtonView() {
-  return help_;
+  return help_button_;
 }
 
 tray::DateView* DateDefaultView::GetDateView() {
   return date_view_;
 }
 
 const tray::DateView* DateDefaultView::GetDateView() const {
   return date_view_;
 }
 
 void DateDefaultView::ButtonPressed(views::Button* sender,
                                     const ui::Event& event) {
   ash::Shell* shell = ash::Shell::GetInstance();
   ash::SystemTrayDelegate* tray_delegate = shell->system_tray_delegate();
-  if (sender == help_) {
+  if (sender == help_button_) {
     shell->metrics()->RecordUserMetricsAction(ash::UMA_TRAY_HELP);
     tray_delegate->ShowHelp();
-  } else if (sender == shutdown_) {
+  } else if (sender == shutdown_button_) {
     shell->metrics()->RecordUserMetricsAction(ash::UMA_TRAY_SHUT_DOWN);
-    ash::Shell::GetInstance()->lock_state_controller()->RequestShutdown(
-        ash::LockStateController::POWER_OFF);
-  } else if (sender == lock_) {
+    ash::Shell::GetInstance()
+        ->lock_state_controller()
+        ->RequestShutdown();
+  } else if (sender == lock_button_) {
     shell->metrics()->RecordUserMetricsAction(ash::UMA_TRAY_LOCK_SCREEN);
     tray_delegate->RequestLockScreen();
   } else {
     NOTREACHED();
   }
 }
 
+void DateDefaultView::OnShutdownPolicyChanged(bool reboot_on_shutdown) {
+  if (!shutdown_button_)
+    return;
+
+  shutdown_button_->SetTooltipText(l10n_util::GetStringUTF16(
+      reboot_on_shutdown ?
+      IDS_ASH_STATUS_TRAY_REBOOT :
+      IDS_ASH_STATUS_TRAY_SHUTDOWN));
+}
+
 }  // namespace ash