Implement all system menu title row buttons for Ash MD

ash/common/system/tiles/tiles_default_view.cc

 // Copyright 2016 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/common/system/tiles/tiles_default_view.h"
 
 #include "ash/common/metrics/user_metrics_action.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/system/tray/system_menu_button.h"
 #include "ash/common/system/tray/system_tray.h"
 #include "ash/common/system/tray/system_tray_controller.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/system_tray_item.h"
 #include "ash/common/system/tray/tray_constants.h"
+#include "ash/common/system/tray/tray_utils.h"
 #include "ash/common/wm_shell.h"
 #include "ash/resources/vector_icons/vector_icons.h"
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/views/border.h"
+#include "ui/views/controls/button/custom_button.h"
 #include "ui/views/controls/separator.h"
 #include "ui/views/layout/box_layout.h"
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/session_manager_client.h"
 #endif
 
 namespace {
 
 // The ISO-639 code for the Hebrew locale. The help icon asset is a '?' which is
 // not mirrored in this locale.
 const char kHebrewLocale[] = "he";
 
 }  // namespace
 
 namespace ash {
 
-TilesDefaultView::TilesDefaultView(SystemTrayItem* owner)
+TilesDefaultView::TilesDefaultView(SystemTrayItem* owner, LoginStatus login)
     : owner_(owner),
+      login_(login),
       settings_button_(nullptr),
       help_button_(nullptr),
       lock_button_(nullptr),
       power_button_(nullptr),
       weak_factory_(this) {}
 
 TilesDefaultView::~TilesDefaultView() {
   SystemTrayDelegate* system_tray_delegate =
       WmShell::Get()->system_tray_delegate();
 
   // Perform this check since the delegate is destroyed first upon shell
   // destruction.
   if (system_tray_delegate)
     system_tray_delegate->RemoveShutdownPolicyObserver(this);
 }
 
 void TilesDefaultView::Init() {
   WmShell* shell = WmShell::Get();
   views::BoxLayout* box_layout =
       new views::BoxLayout(views::BoxLayout::kHorizontal, 4, 0, 0);
   box_layout->set_main_axis_alignment(
       views::BoxLayout::MAIN_AXIS_ALIGNMENT_START);
   box_layout->set_cross_axis_alignment(
       views::BoxLayout::CROSS_AXIS_ALIGNMENT_CENTER);
   SetLayoutManager(box_layout);
 
-  if (shell->system_tray_delegate()->ShouldShowSettings()) {
-    settings_button_ = new SystemMenuButton(this, kSystemMenuSettingsIcon,
-                                            IDS_ASH_STATUS_TRAY_SETTINGS);
-    AddChildView(settings_button_);
-    AddSeparator();
-  }
+  // Show the buttons in this row as disabled if the user is at the login
+  // screen, lock screen, or in a secondary account flow. The exception is
+  // |power_button_| which is always shown as enabled.
+  const bool disable_buttons = !CanOpenWebUISettings(login_);
+
+  settings_button_ = new SystemMenuButton(this, kSystemMenuSettingsIcon,
+                                          IDS_ASH_STATUS_TRAY_SETTINGS);
+  if (disable_buttons || !shell->system_tray_delegate()->ShouldShowSettings())
+    settings_button_->SetState(views::Button::STATE_DISABLED);
+  AddChildView(settings_button_);
+  AddSeparator();
 
   help_button_ =
       new SystemMenuButton(this, kSystemMenuHelpIcon, IDS_ASH_STATUS_TRAY_HELP);
   if (base::i18n::IsRTL() &&
       base::i18n::GetConfiguredLocale() == kHebrewLocale) {
     // The asset for the help button is a question mark '?'. Normally this asset
     // is flipped in RTL locales, however Hebrew uses the LTR '?'. So the
     // flipping must be disabled. (crbug.com/475237)
     help_button_->EnableCanvasFlippingForRTLUI(false);
   }
+  if (disable_buttons)
+    help_button_->SetState(views::Button::STATE_DISABLED);
   AddChildView(help_button_);
+  AddSeparator();
 
 #if !defined(OS_WIN)
-  if (shell->GetSessionStateDelegate()->CanLockScreen()) {
-    AddSeparator();
-    lock_button_ = new SystemMenuButton(this, kSystemMenuLockIcon,
-                                        IDS_ASH_STATUS_TRAY_LOCK);
-    AddChildView(lock_button_);
-  }
+  lock_button_ =
+      new SystemMenuButton(this, kSystemMenuLockIcon, IDS_ASH_STATUS_TRAY_LOCK);
+  if (disable_buttons || !shell->GetSessionStateDelegate()->CanLockScreen())
+    lock_button_->SetState(views::Button::STATE_DISABLED);
 
+  AddChildView(lock_button_);
   AddSeparator();
+
   power_button_ = new SystemMenuButton(this, kSystemMenuPowerIcon,
                                        IDS_ASH_STATUS_TRAY_SHUTDOWN);
   AddChildView(power_button_);
-
   SystemTrayDelegate* system_tray_delegate = shell->system_tray_delegate();
   system_tray_delegate->AddShutdownPolicyObserver(this);
   system_tray_delegate->ShouldRebootOnShutdown(base::Bind(
       &TilesDefaultView::OnShutdownPolicyChanged, weak_factory_.GetWeakPtr()));
 #endif  // !defined(OS_WIN)
 }
 
 void TilesDefaultView::ButtonPressed(views::Button* sender,
                                      const ui::Event& event) {
   DCHECK(sender);
@@ skipping 30 matching lines @@
 
 void TilesDefaultView::AddSeparator() {
   views::Separator* separator =
       new views::Separator(views::Separator::HORIZONTAL);
   separator->SetPreferredSize(kHorizontalSeparatorHeight);
   separator->SetColor(kHorizontalSeparatorColor);
   AddChildView(separator);
 }
 
 }  // namespace ash