ash/system/tray/system_tray.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 "ash/system/tray/system_tray.h"
   6
   7 #include "ash/ash_switches.h"
   8 #include "ash/metrics/user_metrics_recorder.h"
   9 #include "ash/shelf/shelf_layout_manager.h"
  10 #include "ash/shell.h"
  11 #include "ash/shell_window_ids.h"
  12 #include "ash/system/audio/tray_audio.h"
  13 #include "ash/system/bluetooth/tray_bluetooth.h"
  14 #include "ash/system/cast/tray_cast.h"
  15 #include "ash/system/date/tray_date.h"
  16 #include "ash/system/status_area_widget.h"
  17 #include "ash/system/tray/system_tray_delegate.h"
  18 #include "ash/system/tray/system_tray_item.h"
  19 #include "ash/system/tray/tray_bubble_wrapper.h"
  20 #include "ash/system/tray/tray_constants.h"
  21 #include "ash/system/tray_accessibility.h"
  22 #include "ash/system/tray_update.h"
  23 #include "ash/system/user/login_status.h"
  24 #include "ash/system/user/tray_user.h"
  25 #include "ash/system/user/tray_user_separator.h"
  26 #include "ash/system/web_notification/web_notification_tray.h"
  27 #include "base/logging.h"
  28 #include "base/strings/utf_string_conversions.h"
  29 #include "base/timer/timer.h"
  30 #include "grit/ash_strings.h"
  31 #include "ui/aura/window_event_dispatcher.h"
  32 #include "ui/base/l10n/l10n_util.h"
  33 #include "ui/compositor/layer.h"
  34 #include "ui/events/event_constants.h"
  35 #include "ui/gfx/canvas.h"
  36 #include "ui/gfx/screen.h"
  37 #include "ui/gfx/skia_util.h"
  38 #include "ui/views/border.h"
  39 #include "ui/views/controls/label.h"
  40 #include "ui/views/layout/box_layout.h"
  41 #include "ui/views/layout/fill_layout.h"
  42 #include "ui/views/view.h"
  43
  44 #if defined(OS_CHROMEOS)
  45 #include "ash/system/chromeos/audio/tray_audio_chromeos.h"
  46 #include "ash/system/chromeos/brightness/tray_brightness.h"
  47 #include "ash/system/chromeos/enterprise/tray_enterprise.h"
  48 #include "ash/system/chromeos/network/tray_network.h"
  49 #include "ash/system/chromeos/network/tray_sms.h"
  50 #include "ash/system/chromeos/network/tray_vpn.h"
  51 #include "ash/system/chromeos/power/power_status.h"
  52 #include "ash/system/chromeos/power/tray_power.h"
  53 #include "ash/system/chromeos/rotation/tray_rotation_lock.h"
  54 #include "ash/system/chromeos/screen_security/screen_capture_tray_item.h"
  55 #include "ash/system/chromeos/screen_security/screen_share_tray_item.h"
  56 #include "ash/system/chromeos/session/tray_session_length_limit.h"
  57 #include "ash/system/chromeos/settings/tray_settings.h"
  58 #include "ash/system/chromeos/supervised/tray_supervised_user.h"
  59 #include "ash/system/chromeos/tray_caps_lock.h"
  60 #include "ash/system/chromeos/tray_display.h"
  61 #include "ash/system/chromeos/tray_tracing.h"
  62 #include "ash/system/ime/tray_ime_chromeos.h"
  63 #include "ash/system/tray/media_security/multi_profile_media_tray_item.h"
  64 #include "ui/message_center/message_center.h"
  65 #elif defined(OS_WIN)
  66 #include "ash/system/win/audio/tray_audio_win.h"
  67 #include "media/audio/win/core_audio_util_win.h"
  68 #endif
  69
  70 using views::TrayBubbleView;
  71
  72 namespace ash {
  73
  74 // The minimum width of the system tray menu width.
  75 const int kMinimumSystemTrayMenuWidth = 300;
  76
  77 // Class to initialize and manage the SystemTrayBubble and TrayBubbleWrapper
  78 // instances for a bubble.
  79
  80 class SystemBubbleWrapper {
  81  public:
  82   // Takes ownership of |bubble|.
  83   explicit SystemBubbleWrapper(SystemTrayBubble* bubble)
  84       : bubble_(bubble), is_persistent_(false) {}
  85
  86   // Initializes the bubble view and creates |bubble_wrapper_|.
  87   void InitView(TrayBackgroundView* tray,
  88                 views::View* anchor,
  89                 TrayBubbleView::InitParams* init_params,
  90                 bool is_persistent) {
  91     DCHECK(anchor);
  92     user::LoginStatus login_status =
  93         Shell::GetInstance()->system_tray_delegate()->GetUserLoginStatus();
  94     bubble_->InitView(anchor, login_status, init_params);
  95     bubble_wrapper_.reset(new TrayBubbleWrapper(tray, bubble_->bubble_view()));
  96     // The system bubble should not have an arrow.
  97     bubble_->bubble_view()->SetArrowPaintType(
  98         views::BubbleBorder::PAINT_NONE);
  99     is_persistent_ = is_persistent;
 100
 101     // If ChromeVox is enabled, focus the default item if no item is focused.
 102     if (Shell::GetInstance()->accessibility_delegate()->
 103         IsSpokenFeedbackEnabled()) {
 104       bubble_->FocusDefaultIfNeeded();
 105     }
 106   }
 107
 108   // Convenience accessors:
 109   SystemTrayBubble* bubble() const { return bubble_.get(); }
 110   SystemTrayBubble::BubbleType bubble_type() const {
 111     return bubble_->bubble_type();
 112   }
 113   TrayBubbleView* bubble_view() const { return bubble_->bubble_view(); }
 114   bool is_persistent() const { return is_persistent_; }
 115
 116  private:
 117   scoped_ptr<SystemTrayBubble> bubble_;
 118   scoped_ptr<TrayBubbleWrapper> bubble_wrapper_;
 119   bool is_persistent_;
 120
 121   DISALLOW_COPY_AND_ASSIGN(SystemBubbleWrapper);
 122 };
 123
 124
 125 // SystemTray
 126
 127 SystemTray::SystemTray(StatusAreaWidget* status_area_widget)
 128     : TrayBackgroundView(status_area_widget),
 129       items_(),
 130       default_bubble_height_(0),
 131       hide_notifications_(false),
 132       full_system_tray_menu_(false),
 133       tray_accessibility_(NULL),
 134       tray_date_(NULL) {
 135   SetContentsBackground();
 136 }
 137
 138 SystemTray::~SystemTray() {
 139   // Destroy any child views that might have back pointers before ~View().
 140   system_bubble_.reset();
 141   notification_bubble_.reset();
 142   for (std::vector<SystemTrayItem*>::iterator it = items_.begin();
 143        it != items_.end();
 144        ++it) {
 145     (*it)->DestroyTrayView();
 146   }
 147 }
 148
 149 void SystemTray::InitializeTrayItems(SystemTrayDelegate* delegate) {
 150   TrayBackgroundView::Initialize();
 151   CreateItems(delegate);
 152 }
 153
 154 void SystemTray::CreateItems(SystemTrayDelegate* delegate) {
 155 #if !defined(OS_WIN)
 156   // Create user items for each possible user.
 157   ash::Shell* shell = ash::Shell::GetInstance();
 158   int maximum_user_profiles =
 159           shell->session_state_delegate()->GetMaximumNumberOfLoggedInUsers();
 160   for (int i = 0; i < maximum_user_profiles; i++)
 161     AddTrayItem(new TrayUser(this, i));
 162
 163   if (maximum_user_profiles > 1) {
 164     // Add a special double line separator between users and the rest of the
 165     // menu if more then one user is logged in.
 166     AddTrayItem(new TrayUserSeparator(this));
 167   }
 168 #endif
 169
 170   tray_accessibility_ = new TrayAccessibility(this);
 171   tray_date_ = new TrayDate(this);
 172
 173 #if defined(OS_CHROMEOS)
 174   AddTrayItem(new TraySessionLengthLimit(this));
 175   AddTrayItem(new TrayEnterprise(this));
 176   AddTrayItem(new TraySupervisedUser(this));
 177   AddTrayItem(new TrayIME(this));
 178   AddTrayItem(tray_accessibility_);
 179   AddTrayItem(new TrayTracing(this));
 180   AddTrayItem(new TrayPower(this, message_center::MessageCenter::Get()));
 181   AddTrayItem(new TrayNetwork(this));
 182   AddTrayItem(new TrayVPN(this));
 183   AddTrayItem(new TraySms(this));
 184   AddTrayItem(new TrayBluetooth(this));
 185   tray_cast_ = new TrayCast(this);
 186   AddTrayItem(tray_cast_);
 187   AddTrayItem(new TrayDisplay(this));
 188   screen_capture_tray_item_ = new ScreenCaptureTrayItem(this);
 189   AddTrayItem(screen_capture_tray_item_);
 190   screen_share_tray_item_ = new ScreenShareTrayItem(this);
 191   AddTrayItem(screen_share_tray_item_);
 192   AddTrayItem(new MultiProfileMediaTrayItem(this));
 193   AddTrayItem(new TrayAudioChromeOs(this));
 194   AddTrayItem(new TrayBrightness(this));
 195   AddTrayItem(new TrayCapsLock(this));
 196   AddTrayItem(new TrayRotationLock(this));
 197   AddTrayItem(new TraySettings(this));
 198   AddTrayItem(new TrayUpdate(this));
 199   AddTrayItem(tray_date_);
 200 #elif defined(OS_WIN)
 201   AddTrayItem(tray_accessibility_);
 202   if (media::CoreAudioUtil::IsSupported())
 203     AddTrayItem(new TrayAudioWin(this));
 204   AddTrayItem(new TrayUpdate(this));
 205   AddTrayItem(tray_date_);
 206 #elif defined(OS_LINUX)
 207   AddTrayItem(tray_accessibility_);
 208   AddTrayItem(new TrayBluetooth(this));
 209   AddTrayItem(new TrayUpdate(this));
 210   AddTrayItem(tray_date_);
 211 #endif
 212
 213   SetVisible(ash::Shell::GetInstance()->system_tray_delegate()->
 214       GetTrayVisibilityOnStartup());
 215 }
 216
 217 void SystemTray::AddTrayItem(SystemTrayItem* item) {
 218   items_.push_back(item);
 219
 220   SystemTrayDelegate* delegate = Shell::GetInstance()->system_tray_delegate();
 221   views::View* tray_item = item->CreateTrayView(delegate->GetUserLoginStatus());
 222   item->UpdateAfterShelfAlignmentChange(shelf_alignment());
 223
 224   if (tray_item) {
 225     tray_container()->AddChildViewAt(tray_item, 0);
 226     PreferredSizeChanged();
 227     tray_item_map_[item] = tray_item;
 228   }
 229 }
 230
 231 void SystemTray::RemoveTrayItem(SystemTrayItem* item) {
 232   NOTIMPLEMENTED();
 233 }
 234
 235 const std::vector<SystemTrayItem*>& SystemTray::GetTrayItems() const {
 236   return items_.get();
 237 }
 238
 239 void SystemTray::ShowDefaultView(BubbleCreationType creation_type) {
 240   ShowDefaultViewWithOffset(
 241       creation_type,
 242       TrayBubbleView::InitParams::kArrowDefaultOffset,
 243       false);
 244 }
 245
 246 void SystemTray::ShowPersistentDefaultView() {
 247   ShowItems(items_.get(),
 248             false,
 249             false,
 250             BUBBLE_CREATE_NEW,
 251             TrayBubbleView::InitParams::kArrowDefaultOffset,
 252             true);
 253 }
 254
 255 void SystemTray::ShowDetailedView(SystemTrayItem* item,
 256                                   int close_delay,
 257                                   bool activate,
 258                                   BubbleCreationType creation_type) {
 259   std::vector<SystemTrayItem*> items;
 260   // The detailed view with timeout means a UI to show the current system state,
 261   // like the audio level or brightness. Such UI should behave as persistent and
 262   // keep its own logic for the appearance.
 263   bool persistent = (
 264       !activate && close_delay > 0 && creation_type == BUBBLE_CREATE_NEW);
 265   items.push_back(item);
 266   ShowItems(
 267       items, true, activate, creation_type, GetTrayXOffset(item), persistent);
 268   if (system_bubble_)
 269     system_bubble_->bubble()->StartAutoCloseTimer(close_delay);
 270 }
 271
 272 void SystemTray::SetDetailedViewCloseDelay(int close_delay) {
 273   if (HasSystemBubbleType(SystemTrayBubble::BUBBLE_TYPE_DETAILED))
 274     system_bubble_->bubble()->StartAutoCloseTimer(close_delay);
 275 }
 276
 277 void SystemTray::HideDetailedView(SystemTrayItem* item) {
 278   if (item != detailed_item_)
 279     return;
 280   DestroySystemBubble();
 281   UpdateNotificationBubble();
 282 }
 283
 284 void SystemTray::ShowNotificationView(SystemTrayItem* item) {
 285   if (std::find(notification_items_.begin(), notification_items_.end(), item)
 286       != notification_items_.end())
 287     return;
 288   notification_items_.push_back(item);
 289   UpdateNotificationBubble();
 290 }
 291
 292 void SystemTray::HideNotificationView(SystemTrayItem* item) {
 293   std::vector<SystemTrayItem*>::iterator found_iter =
 294       std::find(notification_items_.begin(), notification_items_.end(), item);
 295   if (found_iter == notification_items_.end())
 296     return;
 297   notification_items_.erase(found_iter);
 298   // Only update the notification bubble if visible (i.e. don't create one).
 299   if (notification_bubble_)
 300     UpdateNotificationBubble();
 301 }
 302
 303 void SystemTray::UpdateAfterLoginStatusChange(user::LoginStatus login_status) {
 304   DestroySystemBubble();
 305   UpdateNotificationBubble();
 306
 307   for (std::vector<SystemTrayItem*>::iterator it = items_.begin();
 308       it != items_.end();
 309       ++it) {
 310     (*it)->UpdateAfterLoginStatusChange(login_status);
 311   }
 312
 313   // Items default to SHELF_ALIGNMENT_BOTTOM. Update them if the initial
 314   // position of the shelf differs.
 315   if (shelf_alignment() != SHELF_ALIGNMENT_BOTTOM)
 316     UpdateAfterShelfAlignmentChange(shelf_alignment());
 317
 318   SetVisible(true);
 319   PreferredSizeChanged();
 320 }
 321
 322 void SystemTray::UpdateAfterShelfAlignmentChange(ShelfAlignment alignment) {
 323   for (std::vector<SystemTrayItem*>::iterator it = items_.begin();
 324       it != items_.end();
 325       ++it) {
 326     (*it)->UpdateAfterShelfAlignmentChange(alignment);
 327   }
 328 }
 329
 330 void SystemTray::SetHideNotifications(bool hide_notifications) {
 331   if (notification_bubble_)
 332     notification_bubble_->bubble()->SetVisible(!hide_notifications);
 333   hide_notifications_ = hide_notifications;
 334 }
 335
 336 bool SystemTray::ShouldShowShelf() const {
 337   return system_bubble_.get() && system_bubble_->bubble()->ShouldShowShelf();
 338 }
 339
 340 bool SystemTray::HasSystemBubble() const {
 341   return system_bubble_.get() != NULL;
 342 }
 343
 344 bool SystemTray::HasNotificationBubble() const {
 345   return notification_bubble_.get() != NULL;
 346 }
 347
 348 SystemTrayBubble* SystemTray::GetSystemBubble() {
 349   if (!system_bubble_)
 350     return NULL;
 351   return system_bubble_->bubble();
 352 }
 353
 354 bool SystemTray::IsAnyBubbleVisible() const {
 355   return ((system_bubble_.get() &&
 356            system_bubble_->bubble()->IsVisible()) ||
 357           (notification_bubble_.get() &&
 358            notification_bubble_->bubble()->IsVisible()));
 359 }
 360
 361 bool SystemTray::IsMouseInNotificationBubble() const {
 362   if (!notification_bubble_)
 363     return false;
 364   return notification_bubble_->bubble_view()->GetBoundsInScreen().Contains(
 365       Shell::GetScreen()->GetCursorScreenPoint());
 366 }
 367
 368 bool SystemTray::CloseSystemBubble() const {
 369   if (!system_bubble_)
 370     return false;
 371   system_bubble_->bubble()->Close();
 372   return true;
 373 }
 374
 375 views::View* SystemTray::GetHelpButtonView() const {
 376   return tray_date_->GetHelpButtonView();
 377 }
 378
 379 bool SystemTray::CloseNotificationBubbleForTest() const {
 380   if (!notification_bubble_)
 381     return false;
 382   notification_bubble_->bubble()->Close();
 383   return true;
 384 }
 385
 386 // Private methods.
 387
 388 bool SystemTray::HasSystemBubbleType(SystemTrayBubble::BubbleType type) {
 389   DCHECK(type != SystemTrayBubble::BUBBLE_TYPE_NOTIFICATION);
 390   return system_bubble_.get() && system_bubble_->bubble_type() == type;
 391 }
 392
 393 void SystemTray::DestroySystemBubble() {
 394   CloseSystemBubbleAndDeactivateSystemTray();
 395   detailed_item_ = NULL;
 396   UpdateWebNotifications();
 397 }
 398
 399 void SystemTray::DestroyNotificationBubble() {
 400   if (notification_bubble_) {
 401     notification_bubble_.reset();
 402     UpdateWebNotifications();
 403   }
 404 }
 405
 406 base::string16 SystemTray::GetAccessibleNameForTray() {
 407   base::string16 time = GetAccessibleTimeString(base::Time::Now());
 408   base::string16 battery = base::ASCIIToUTF16("");
 409 #if defined(OS_CHROMEOS)
 410   battery = PowerStatus::Get()->GetAccessibleNameString(false);
 411 #endif
 412   return l10n_util::GetStringFUTF16(
 413       IDS_ASH_STATUS_TRAY_ACCESSIBLE_DESCRIPTION, time, battery);
 414 }
 415
 416 int SystemTray::GetTrayXOffset(SystemTrayItem* item) const {
 417   // Don't attempt to align the arrow if the shelf is on the left or right.
 418   if (shelf_alignment() != SHELF_ALIGNMENT_BOTTOM &&
 419       shelf_alignment() != SHELF_ALIGNMENT_TOP)
 420     return TrayBubbleView::InitParams::kArrowDefaultOffset;
 421
 422   std::map<SystemTrayItem*, views::View*>::const_iterator it =
 423       tray_item_map_.find(item);
 424   if (it == tray_item_map_.end())
 425     return TrayBubbleView::InitParams::kArrowDefaultOffset;
 426
 427   const views::View* item_view = it->second;
 428   if (item_view->bounds().IsEmpty()) {
 429     // The bounds of item could be still empty if it does not have a visible
 430     // tray view. In that case, use the default (minimum) offset.
 431     return TrayBubbleView::InitParams::kArrowDefaultOffset;
 432   }
 433
 434   gfx::Point point(item_view->width() / 2, 0);
 435   ConvertPointToWidget(item_view, &point);
 436   return point.x();
 437 }
 438
 439 void SystemTray::ShowDefaultViewWithOffset(BubbleCreationType creation_type,
 440                                            int arrow_offset,
 441                                            bool persistent) {
 442   if (creation_type != BUBBLE_USE_EXISTING) {
 443     Shell::GetInstance()->metrics()->RecordUserMetricsAction(
 444         ash::UMA_STATUS_AREA_MENU_OPENED);
 445   }
 446   ShowItems(items_.get(), false, true, creation_type, arrow_offset, persistent);
 447 }
 448
 449 void SystemTray::ShowItems(const std::vector<SystemTrayItem*>& items,
 450                            bool detailed,
 451                            bool can_activate,
 452                            BubbleCreationType creation_type,
 453                            int arrow_offset,
 454                            bool persistent) {
 455   // No system tray bubbles in kiosk mode.
 456   if (Shell::GetInstance()->system_tray_delegate()->GetUserLoginStatus() ==
 457       ash::user::LOGGED_IN_KIOSK_APP) {
 458     return;
 459   }
 460
 461   // Destroy any existing bubble and create a new one.
 462   SystemTrayBubble::BubbleType bubble_type = detailed ?
 463       SystemTrayBubble::BUBBLE_TYPE_DETAILED :
 464       SystemTrayBubble::BUBBLE_TYPE_DEFAULT;
 465
 466   // Destroy the notification bubble here so that it doesn't get rebuilt
 467   // while we add items to the main bubble_ (e.g. in HideNotificationView).
 468   notification_bubble_.reset();
 469   if (system_bubble_.get() && creation_type == BUBBLE_USE_EXISTING) {
 470     system_bubble_->bubble()->UpdateView(items, bubble_type);
 471     // If ChromeVox is enabled, focus the default item if no item is focused.
 472     if (Shell::GetInstance()->accessibility_delegate()->
 473         IsSpokenFeedbackEnabled()) {
 474       system_bubble_->bubble()->FocusDefaultIfNeeded();
 475     }
 476   } else {
 477     // Remember if the menu is a single property (like e.g. volume) or the
 478     // full tray menu. Note that in case of the |BUBBLE_USE_EXISTING| case
 479     // above, |full_system_tray_menu_| does not get changed since the fact that
 480     // the menu is full (or not) doesn't change even if a "single property"
 481     // (like network) replaces most of the menu.
 482     full_system_tray_menu_ = items.size() > 1;
 483     // The menu width is fixed, and it is a per language setting.
 484     int menu_width = std::max(kMinimumSystemTrayMenuWidth,
 485         Shell::GetInstance()->system_tray_delegate()->GetSystemTrayMenuWidth());
 486
 487     TrayBubbleView::InitParams init_params(TrayBubbleView::ANCHOR_TYPE_TRAY,
 488                                            GetAnchorAlignment(),
 489                                            menu_width,
 490                                            kTrayPopupMaxWidth);
 491     init_params.can_activate = can_activate;
 492     init_params.first_item_has_no_margin = true;
 493     if (detailed) {
 494       // This is the case where a volume control or brightness control bubble
 495       // is created.
 496       init_params.max_height = default_bubble_height_;
 497       init_params.arrow_color = kBackgroundColor;
 498     } else {
 499       init_params.arrow_color = kHeaderBackgroundColor;
 500     }
 501     init_params.arrow_offset = arrow_offset;
 502     if (bubble_type == SystemTrayBubble::BUBBLE_TYPE_DEFAULT)
 503       init_params.close_on_deactivate = !persistent;
 504     // For Volume and Brightness we don't want to show an arrow when
 505     // they are shown in a bubble by themselves.
 506     init_params.arrow_paint_type = views::BubbleBorder::PAINT_NORMAL;
 507     if (items.size() == 1 && items[0]->ShouldHideArrow())
 508       init_params.arrow_paint_type = views::BubbleBorder::PAINT_TRANSPARENT;
 509     SystemTrayBubble* bubble = new SystemTrayBubble(this, items, bubble_type);
 510     system_bubble_.reset(new SystemBubbleWrapper(bubble));
 511     system_bubble_->InitView(this, tray_container(), &init_params, persistent);
 512   }
 513   // Save height of default view for creating detailed views directly.
 514   if (!detailed)
 515     default_bubble_height_ = system_bubble_->bubble_view()->height();
 516
 517   if (detailed && items.size() > 0)
 518     detailed_item_ = items[0];
 519   else
 520     detailed_item_ = NULL;
 521
 522   UpdateNotificationBubble();  // State changed, re-create notifications.
 523   if (!notification_bubble_)
 524     UpdateWebNotifications();
 525   GetShelfLayoutManager()->UpdateAutoHideState();
 526
 527   // When we show the system menu in our alternate shelf layout, we need to
 528   // tint the background.
 529   if (full_system_tray_menu_)
 530     SetDrawBackgroundAsActive(true);
 531 }
 532
 533 void SystemTray::UpdateNotificationBubble() {
 534   // Only show the notification bubble if we have notifications.
 535   if (notification_items_.empty()) {
 536     DestroyNotificationBubble();
 537     return;
 538   }
 539   // Destroy the existing bubble before constructing a new one.
 540   notification_bubble_.reset();
 541   SystemTrayBubble* notification_bubble;
 542   notification_bubble = new SystemTrayBubble(
 543       this, notification_items_, SystemTrayBubble::BUBBLE_TYPE_NOTIFICATION);
 544   views::View* anchor;
 545   TrayBubbleView::AnchorType anchor_type;
 546   // Tray items might want to show notifications while we are creating and
 547   // initializing the |system_bubble_| - but it might not be fully initialized
 548   // when coming here - this would produce a crashed like crbug.com/247416.
 549   // As such we check the existence of the widget here.
 550   if (system_bubble_.get() &&
 551       system_bubble_->bubble_view() &&
 552       system_bubble_->bubble_view()->GetWidget()) {
 553     anchor = system_bubble_->bubble_view();
 554     anchor_type = TrayBubbleView::ANCHOR_TYPE_BUBBLE;
 555   } else {
 556     anchor = tray_container();
 557     anchor_type = TrayBubbleView::ANCHOR_TYPE_TRAY;
 558   }
 559   TrayBubbleView::InitParams init_params(anchor_type,
 560                                          GetAnchorAlignment(),
 561                                          kTrayPopupMinWidth,
 562                                          kTrayPopupMaxWidth);
 563   init_params.first_item_has_no_margin = true;
 564   init_params.arrow_color = kBackgroundColor;
 565   init_params.arrow_offset = GetTrayXOffset(notification_items_[0]);
 566   notification_bubble_.reset(new SystemBubbleWrapper(notification_bubble));
 567   notification_bubble_->InitView(this, anchor, &init_params, false);
 568
 569   if (notification_bubble->bubble_view()->child_count() == 0) {
 570     // It is possible that none of the items generated actual notifications.
 571     DestroyNotificationBubble();
 572     return;
 573   }
 574   if (hide_notifications_)
 575     notification_bubble->SetVisible(false);
 576   else
 577     UpdateWebNotifications();
 578 }
 579
 580 void SystemTray::UpdateWebNotifications() {
 581   TrayBubbleView* bubble_view = NULL;
 582   if (notification_bubble_)
 583     bubble_view = notification_bubble_->bubble_view();
 584   else if (system_bubble_)
 585     bubble_view = system_bubble_->bubble_view();
 586
 587   int height = 0;
 588   if (bubble_view) {
 589     gfx::Rect work_area = Shell::GetScreen()->GetDisplayNearestWindow(
 590         bubble_view->GetWidget()->GetNativeView()).work_area();
 591     if (GetShelfLayoutManager()->GetAlignment() != SHELF_ALIGNMENT_TOP) {
 592       height = std::max(
 593           0, work_area.height() - bubble_view->GetBoundsInScreen().y());
 594     } else {
 595       height = std::max(
 596           0, bubble_view->GetBoundsInScreen().bottom() - work_area.y());
 597     }
 598   }
 599   status_area_widget()->web_notification_tray()->SetSystemTrayHeight(height);
 600 }
 601
 602 base::string16 SystemTray::GetAccessibleTimeString(
 603     const base::Time& now) const {
 604   base::HourClockType hour_type =
 605       ash::Shell::GetInstance()->system_tray_delegate()->GetHourClockType();
 606   return base::TimeFormatTimeOfDayWithHourClockType(
 607       now, hour_type, base::kKeepAmPm);
 608 }
 609
 610 void SystemTray::SetShelfAlignment(ShelfAlignment alignment) {
 611   if (alignment == shelf_alignment())
 612     return;
 613   TrayBackgroundView::SetShelfAlignment(alignment);
 614   UpdateAfterShelfAlignmentChange(alignment);
 615   // Destroy any existing bubble so that it is rebuilt correctly.
 616   CloseSystemBubbleAndDeactivateSystemTray();
 617   // Rebuild any notification bubble.
 618   if (notification_bubble_) {
 619     notification_bubble_.reset();
 620     UpdateNotificationBubble();
 621   }
 622 }
 623
 624 void SystemTray::AnchorUpdated() {
 625   if (notification_bubble_) {
 626     notification_bubble_->bubble_view()->UpdateBubble();
 627     // Ensure that the notification buble is above the shelf/status area.
 628     notification_bubble_->bubble_view()->GetWidget()->StackAtTop();
 629     UpdateBubbleViewArrow(notification_bubble_->bubble_view());
 630   }
 631   if (system_bubble_) {
 632     system_bubble_->bubble_view()->UpdateBubble();
 633     UpdateBubbleViewArrow(system_bubble_->bubble_view());
 634   }
 635 }
 636
 637 void SystemTray::BubbleResized(const TrayBubbleView* bubble_view) {
 638   UpdateWebNotifications();
 639 }
 640
 641 void SystemTray::HideBubbleWithView(const TrayBubbleView* bubble_view) {
 642   if (system_bubble_.get() && bubble_view == system_bubble_->bubble_view()) {
 643     DestroySystemBubble();
 644     UpdateNotificationBubble();  // State changed, re-create notifications.
 645     GetShelfLayoutManager()->UpdateAutoHideState();
 646   } else if (notification_bubble_.get() &&
 647              bubble_view == notification_bubble_->bubble_view()) {
 648     DestroyNotificationBubble();
 649   }
 650 }
 651
 652 bool SystemTray::ClickedOutsideBubble() {
 653   if (!system_bubble_ || system_bubble_->is_persistent())
 654     return false;
 655   HideBubbleWithView(system_bubble_->bubble_view());
 656   return true;
 657 }
 658
 659 void SystemTray::BubbleViewDestroyed() {
 660   if (system_bubble_) {
 661     system_bubble_->bubble()->DestroyItemViews();
 662     system_bubble_->bubble()->BubbleViewDestroyed();
 663   }
 664 }
 665
 666 void SystemTray::OnMouseEnteredView() {
 667   if (system_bubble_)
 668     system_bubble_->bubble()->StopAutoCloseTimer();
 669 }
 670
 671 void SystemTray::OnMouseExitedView() {
 672   if (system_bubble_)
 673     system_bubble_->bubble()->RestartAutoCloseTimer();
 674 }
 675
 676 base::string16 SystemTray::GetAccessibleNameForBubble() {
 677   return GetAccessibleNameForTray();
 678 }
 679
 680 gfx::Rect SystemTray::GetAnchorRect(
 681     views::Widget* anchor_widget,
 682     TrayBubbleView::AnchorType anchor_type,
 683     TrayBubbleView::AnchorAlignment anchor_alignment) const {
 684   return GetBubbleAnchorRect(anchor_widget, anchor_type, anchor_alignment);
 685 }
 686
 687 void SystemTray::HideBubble(const TrayBubbleView* bubble_view) {
 688   HideBubbleWithView(bubble_view);
 689 }
 690
 691 views::View* SystemTray::GetTrayItemViewForTest(SystemTrayItem* item) {
 692   std::map<SystemTrayItem*, views::View*>::iterator it =
 693       tray_item_map_.find(item);
 694   return it == tray_item_map_.end() ? NULL : it->second;
 695 }
 696
 697 TrayCast* SystemTray::GetTrayCastForTesting() const { return tray_cast_; }
 698
 699 TrayDate* SystemTray::GetTrayDateForTesting() const { return tray_date_; }
 700
 701 bool SystemTray::PerformAction(const ui::Event& event) {
 702   // If we're already showing the default view, hide it; otherwise, show it
 703   // (and hide any popup that's currently shown).
 704   if (HasSystemBubbleType(SystemTrayBubble::BUBBLE_TYPE_DEFAULT)) {
 705     system_bubble_->bubble()->Close();
 706   } else {
 707     int arrow_offset = TrayBubbleView::InitParams::kArrowDefaultOffset;
 708     if (event.IsMouseEvent() || event.type() == ui::ET_GESTURE_TAP) {
 709       const ui::LocatedEvent& located_event =
 710           static_cast<const ui::LocatedEvent&>(event);
 711       if (shelf_alignment() == SHELF_ALIGNMENT_BOTTOM ||
 712           shelf_alignment() == SHELF_ALIGNMENT_TOP) {
 713         gfx::Point point(located_event.x(), 0);
 714         ConvertPointToWidget(this, &point);
 715         arrow_offset = point.x();
 716       }
 717     }
 718     ShowDefaultViewWithOffset(BUBBLE_CREATE_NEW, arrow_offset, false);
 719   }
 720   return true;
 721 }
 722
 723 void SystemTray::CloseSystemBubbleAndDeactivateSystemTray() {
 724   system_bubble_.reset();
 725   // When closing a system bubble with the alternate shelf layout, we need to
 726   // turn off the active tinting of the shelf.
 727   if (full_system_tray_menu_) {
 728     SetDrawBackgroundAsActive(false);
 729     full_system_tray_menu_ = false;
 730   }
 731 }
 732
 733 }  // namespace ash