ash/shell.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/shell.h"
   6
   7 #include <algorithm>
   8 #include <string>
   9
  10 #include "ash/accelerators/accelerator_controller.h"
  11 #include "ash/accelerators/accelerator_delegate.h"
  12 #include "ash/accelerators/focus_manager_factory.h"
  13 #include "ash/accelerators/nested_accelerator_delegate.h"
  14 #include "ash/accelerometer/accelerometer_controller.h"
  15 #include "ash/ash_switches.h"
  16 #include "ash/autoclick/autoclick_controller.h"
  17 #include "ash/desktop_background/desktop_background_controller.h"
  18 #include "ash/desktop_background/desktop_background_view.h"
  19 #include "ash/desktop_background/user_wallpaper_delegate.h"
  20 #include "ash/display/cursor_window_controller.h"
  21 #include "ash/display/display_controller.h"
  22 #include "ash/display/display_manager.h"
  23 #include "ash/display/event_transformation_handler.h"
  24 #include "ash/display/mouse_cursor_event_filter.h"
  25 #include "ash/display/screen_position_controller.h"
  26 #include "ash/drag_drop/drag_drop_controller.h"
  27 #include "ash/first_run/first_run_helper_impl.h"
  28 #include "ash/focus_cycler.h"
  29 #include "ash/frame/custom_frame_view_ash.h"
  30 #include "ash/gpu_support.h"
  31 #include "ash/high_contrast/high_contrast_controller.h"
  32 #include "ash/host/ash_window_tree_host_init_params.h"
  33 #include "ash/keyboard_uma_event_filter.h"
  34 #include "ash/magnifier/magnification_controller.h"
  35 #include "ash/magnifier/partial_magnification_controller.h"
  36 #include "ash/media_delegate.h"
  37 #include "ash/new_window_delegate.h"
  38 #include "ash/root_window_controller.h"
  39 #include "ash/session/session_state_delegate.h"
  40 #include "ash/shelf/app_list_shelf_item_delegate.h"
  41 #include "ash/shelf/shelf_delegate.h"
  42 #include "ash/shelf/shelf_item_delegate.h"
  43 #include "ash/shelf/shelf_item_delegate_manager.h"
  44 #include "ash/shelf/shelf_layout_manager.h"
  45 #include "ash/shelf/shelf_model.h"
  46 #include "ash/shelf/shelf_widget.h"
  47 #include "ash/shelf/shelf_window_watcher.h"
  48 #include "ash/shell_delegate.h"
  49 #include "ash/shell_factory.h"
  50 #include "ash/shell_init_params.h"
  51 #include "ash/shell_window_ids.h"
  52 #include "ash/system/locale/locale_notification_controller.h"
  53 #include "ash/system/status_area_widget.h"
  54 #include "ash/system/tray/system_tray_delegate.h"
  55 #include "ash/system/tray/system_tray_notifier.h"
  56 #include "ash/wm/app_list_controller.h"
  57 #include "ash/wm/ash_focus_rules.h"
  58 #include "ash/wm/ash_native_cursor_manager.h"
  59 #include "ash/wm/coordinate_conversion.h"
  60 #include "ash/wm/event_client_impl.h"
  61 #include "ash/wm/lock_state_controller.h"
  62 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
  63 #include "ash/wm/maximize_mode/maximize_mode_window_manager.h"
  64 #include "ash/wm/mru_window_tracker.h"
  65 #include "ash/wm/overlay_event_filter.h"
  66 #include "ash/wm/overview/window_selector_controller.h"
  67 #include "ash/wm/power_button_controller.h"
  68 #include "ash/wm/resize_shadow_controller.h"
  69 #include "ash/wm/root_window_layout_manager.h"
  70 #include "ash/wm/screen_dimmer.h"
  71 #include "ash/wm/system_gesture_event_filter.h"
  72 #include "ash/wm/system_modal_container_event_filter.h"
  73 #include "ash/wm/system_modal_container_layout_manager.h"
  74 #include "ash/wm/toplevel_window_event_handler.h"
  75 #include "ash/wm/video_detector.h"
  76 #include "ash/wm/window_animations.h"
  77 #include "ash/wm/window_cycle_controller.h"
  78 #include "ash/wm/window_positioner.h"
  79 #include "ash/wm/window_properties.h"
  80 #include "ash/wm/window_util.h"
  81 #include "ash/wm/workspace_controller.h"
  82 #include "base/bind.h"
  83 #include "base/debug/trace_event.h"
  84 #include "ui/aura/client/aura_constants.h"
  85 #include "ui/aura/env.h"
  86 #include "ui/aura/layout_manager.h"
  87 #include "ui/aura/window.h"
  88 #include "ui/aura/window_event_dispatcher.h"
  89 #include "ui/base/ui_base_switches.h"
  90 #include "ui/compositor/layer.h"
  91 #include "ui/compositor/layer_animator.h"
  92 #include "ui/events/event_target_iterator.h"
  93 #include "ui/gfx/display.h"
  94 #include "ui/gfx/image/image_skia.h"
  95 #include "ui/gfx/screen.h"
  96 #include "ui/gfx/size.h"
  97 #include "ui/keyboard/keyboard.h"
  98 #include "ui/keyboard/keyboard_controller.h"
  99 #include "ui/keyboard/keyboard_switches.h"
 100 #include "ui/keyboard/keyboard_util.h"
 101 #include "ui/message_center/message_center.h"
 102 #include "ui/views/corewm/tooltip_aura.h"
 103 #include "ui/views/corewm/tooltip_controller.h"
 104 #include "ui/views/focus/focus_manager_factory.h"
 105 #include "ui/views/widget/native_widget_aura.h"
 106 #include "ui/views/widget/widget.h"
 107 #include "ui/wm/core/accelerator_filter.h"
 108 #include "ui/wm/core/compound_event_filter.h"
 109 #include "ui/wm/core/focus_controller.h"
 110 #include "ui/wm/core/input_method_event_filter.h"
 111 #include "ui/wm/core/nested_accelerator_controller.h"
 112 #include "ui/wm/core/shadow_controller.h"
 113 #include "ui/wm/core/user_activity_detector.h"
 114 #include "ui/wm/core/visibility_controller.h"
 115 #include "ui/wm/core/window_modality_controller.h"
 116
 117 #if defined(OS_CHROMEOS)
 118 #if defined(USE_X11)
 119 #include "ash/accelerators/magnifier_key_scroller.h"
 120 #include "ash/accelerators/spoken_feedback_toggler.h"
 121 #include "ash/touch/touch_transformer_controller.h"
 122 #include "ui/gfx/x/x11_types.h"
 123 #endif  // defined(USE_X11)
 124 #include "ash/ash_constants.h"
 125 #include "ash/display/display_change_observer_chromeos.h"
 126 #include "ash/display/display_configurator_animation.h"
 127 #include "ash/display/display_error_observer_chromeos.h"
 128 #include "ash/display/projecting_observer_chromeos.h"
 129 #include "ash/display/resolution_notification_controller.h"
 130 #include "ash/sticky_keys/sticky_keys_controller.h"
 131 #include "ash/system/chromeos/bluetooth/bluetooth_notification_controller.h"
 132 #include "ash/system/chromeos/brightness/brightness_controller_chromeos.h"
 133 #include "ash/system/chromeos/power/power_event_observer.h"
 134 #include "ash/system/chromeos/power/power_status.h"
 135 #include "ash/system/chromeos/power/video_activity_notifier.h"
 136 #include "ash/system/chromeos/session/last_window_closed_logout_reminder.h"
 137 #include "ash/system/chromeos/session/logout_confirmation_controller.h"
 138 #include "base/bind_helpers.h"
 139 #include "base/sys_info.h"
 140 #include "ui/chromeos/user_activity_power_manager_notifier.h"
 141 #include "ui/display/chromeos/display_configurator.h"
 142 #endif  // defined(OS_CHROMEOS)
 143
 144 namespace ash {
 145
 146 namespace {
 147
 148 using aura::Window;
 149 using views::Widget;
 150
 151 // A Corewm VisibilityController subclass that calls the Ash animation routine
 152 // so we can pick up our extended animations. See ash/wm/window_animations.h.
 153 class AshVisibilityController : public ::wm::VisibilityController {
 154  public:
 155   AshVisibilityController() {}
 156   virtual ~AshVisibilityController() {}
 157
 158  private:
 159   // Overridden from ::wm::VisibilityController:
 160   virtual bool CallAnimateOnChildWindowVisibilityChanged(
 161       aura::Window* window,
 162       bool visible) OVERRIDE {
 163     return AnimateOnChildWindowVisibilityChanged(window, visible);
 164   }
 165
 166   DISALLOW_COPY_AND_ASSIGN(AshVisibilityController);
 167 };
 168
 169 AshWindowTreeHostInitParams ShellInitParamsToAshWindowTreeHostInitParams(
 170     const ShellInitParams& shell_init_params) {
 171   AshWindowTreeHostInitParams ash_init_params;
 172 #if defined(OS_WIN)
 173   ash_init_params.remote_hwnd = shell_init_params.remote_hwnd;
 174 #endif
 175   return ash_init_params;
 176 }
 177
 178 }  // namespace
 179
 180 // static
 181 Shell* Shell::instance_ = NULL;
 182 // static
 183 bool Shell::initially_hide_cursor_ = false;
 184
 185 ////////////////////////////////////////////////////////////////////////////////
 186 // Shell, public:
 187
 188 // static
 189 Shell* Shell::CreateInstance(const ShellInitParams& init_params) {
 190   CHECK(!instance_);
 191   instance_ = new Shell(init_params.delegate);
 192   instance_->Init(init_params);
 193   return instance_;
 194 }
 195
 196 // static
 197 Shell* Shell::GetInstance() {
 198   CHECK(instance_);
 199   return instance_;
 200 }
 201
 202 // static
 203 bool Shell::HasInstance() {
 204   return !!instance_;
 205 }
 206
 207 // static
 208 void Shell::DeleteInstance() {
 209   delete instance_;
 210   instance_ = NULL;
 211 }
 212
 213 // static
 214 RootWindowController* Shell::GetPrimaryRootWindowController() {
 215   CHECK(HasInstance());
 216   return GetRootWindowController(GetPrimaryRootWindow());
 217 }
 218
 219 // static
 220 Shell::RootWindowControllerList Shell::GetAllRootWindowControllers() {
 221   CHECK(HasInstance());
 222   return Shell::GetInstance()->display_controller()->
 223       GetAllRootWindowControllers();
 224 }
 225
 226 // static
 227 aura::Window* Shell::GetPrimaryRootWindow() {
 228   CHECK(HasInstance());
 229   return GetInstance()->display_controller()->GetPrimaryRootWindow();
 230 }
 231
 232 // static
 233 aura::Window* Shell::GetTargetRootWindow() {
 234   CHECK(HasInstance());
 235   Shell* shell = GetInstance();
 236   if (shell->scoped_target_root_window_)
 237     return shell->scoped_target_root_window_;
 238   return shell->target_root_window_;
 239 }
 240
 241 // static
 242 gfx::Screen* Shell::GetScreen() {
 243   return gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_ALTERNATE);
 244 }
 245
 246 // static
 247 aura::Window::Windows Shell::GetAllRootWindows() {
 248   CHECK(HasInstance());
 249   return Shell::GetInstance()->display_controller()->
 250       GetAllRootWindows();
 251 }
 252
 253 // static
 254 aura::Window* Shell::GetContainer(aura::Window* root_window,
 255                                   int container_id) {
 256   return root_window->GetChildById(container_id);
 257 }
 258
 259 // static
 260 const aura::Window* Shell::GetContainer(const aura::Window* root_window,
 261                                         int container_id) {
 262   return root_window->GetChildById(container_id);
 263 }
 264
 265 // static
 266 std::vector<aura::Window*> Shell::GetContainersFromAllRootWindows(
 267     int container_id,
 268     aura::Window* priority_root) {
 269   std::vector<aura::Window*> containers;
 270   aura::Window::Windows root_windows = GetAllRootWindows();
 271   for (aura::Window::Windows::const_iterator it = root_windows.begin();
 272        it != root_windows.end(); ++it) {
 273     aura::Window* container = (*it)->GetChildById(container_id);
 274     if (container) {
 275       if (priority_root && priority_root->Contains(container))
 276         containers.insert(containers.begin(), container);
 277       else
 278         containers.push_back(container);
 279     }
 280   }
 281   return containers;
 282 }
 283
 284 void Shell::ShowContextMenu(const gfx::Point& location_in_screen,
 285                             ui::MenuSourceType source_type) {
 286   // No context menus if there is no session with an active user.
 287   if (!session_state_delegate_->NumberOfLoggedInUsers())
 288     return;
 289   // No context menus when screen is locked.
 290   if (session_state_delegate_->IsScreenLocked())
 291     return;
 292
 293   aura::Window* root =
 294       wm::GetRootWindowMatching(gfx::Rect(location_in_screen, gfx::Size()));
 295   GetRootWindowController(root)
 296       ->ShowContextMenu(location_in_screen, source_type);
 297 }
 298
 299 void Shell::ShowAppList(aura::Window* window) {
 300   // If the context window is not given, show it on the target root window.
 301   if (!window)
 302     window = GetTargetRootWindow();
 303   if (!app_list_controller_)
 304     app_list_controller_.reset(new AppListController);
 305   app_list_controller_->Show(window);
 306 }
 307
 308 void Shell::DismissAppList() {
 309   if (!app_list_controller_)
 310     return;
 311   app_list_controller_->Dismiss();
 312 }
 313
 314 void Shell::ToggleAppList(aura::Window* window) {
 315   if (app_list_controller_ && app_list_controller_->IsVisible()) {
 316     DismissAppList();
 317     return;
 318   }
 319
 320   ShowAppList(window);
 321 }
 322
 323 bool Shell::GetAppListTargetVisibility() const {
 324   return app_list_controller_.get() &&
 325       app_list_controller_->GetTargetVisibility();
 326 }
 327
 328 aura::Window* Shell::GetAppListWindow() {
 329   return app_list_controller_.get() ? app_list_controller_->GetWindow() : NULL;
 330 }
 331
 332 app_list::AppListView* Shell::GetAppListView() {
 333   return app_list_controller_.get() ? app_list_controller_->GetView() : NULL;
 334 }
 335
 336 bool Shell::IsSystemModalWindowOpen() const {
 337   if (simulate_modal_window_open_for_testing_)
 338     return true;
 339   const std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 340       kShellWindowId_SystemModalContainer, NULL);
 341   for (std::vector<aura::Window*>::const_iterator cit = containers.begin();
 342        cit != containers.end(); ++cit) {
 343     for (aura::Window::Windows::const_iterator wit = (*cit)->children().begin();
 344          wit != (*cit)->children().end(); ++wit) {
 345       if ((*wit)->GetProperty(aura::client::kModalKey) ==
 346           ui::MODAL_TYPE_SYSTEM && (*wit)->TargetVisibility()) {
 347         return true;
 348       }
 349     }
 350   }
 351   return false;
 352 }
 353
 354 views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
 355     views::Widget* widget) {
 356   // Use translucent-style window frames for dialogs.
 357   return new CustomFrameViewAsh(widget);
 358 }
 359
 360 void Shell::RotateFocus(Direction direction) {
 361   focus_cycler_->RotateFocus(direction == FORWARD ? FocusCycler::FORWARD
 362                                                   : FocusCycler::BACKWARD);
 363 }
 364
 365 void Shell::SetDisplayWorkAreaInsets(Window* contains,
 366                                      const gfx::Insets& insets) {
 367   if (!display_controller_->UpdateWorkAreaOfDisplayNearestWindow(
 368           contains, insets)) {
 369     return;
 370   }
 371   FOR_EACH_OBSERVER(ShellObserver, observers_,
 372                     OnDisplayWorkAreaInsetsChanged());
 373 }
 374
 375 void Shell::OnLoginStateChanged(user::LoginStatus status) {
 376   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLoginStateChanged(status));
 377 }
 378
 379 void Shell::OnLoginUserProfilePrepared() {
 380   CreateShelf();
 381   CreateKeyboard();
 382 }
 383
 384 void Shell::UpdateAfterLoginStatusChange(user::LoginStatus status) {
 385   RootWindowControllerList controllers = GetAllRootWindowControllers();
 386   for (RootWindowControllerList::iterator iter = controllers.begin();
 387        iter != controllers.end(); ++iter)
 388     (*iter)->UpdateAfterLoginStatusChange(status);
 389 }
 390
 391 void Shell::OnAppTerminating() {
 392   FOR_EACH_OBSERVER(ShellObserver, observers_, OnAppTerminating());
 393 }
 394
 395 void Shell::OnLockStateChanged(bool locked) {
 396   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLockStateChanged(locked));
 397 #ifndef NDEBUG
 398   // Make sure that there is no system modal in Lock layer when unlocked.
 399   if (!locked) {
 400     std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 401         kShellWindowId_LockSystemModalContainer, GetPrimaryRootWindow());
 402     for (std::vector<aura::Window*>::const_iterator iter = containers.begin();
 403          iter != containers.end(); ++iter) {
 404       DCHECK_EQ(0u, (*iter)->children().size());
 405     }
 406   }
 407 #endif
 408 }
 409
 410 void Shell::OnCastingSessionStartedOrStopped(bool started) {
 411 #if defined(OS_CHROMEOS) && defined(USE_X11)
 412   if (projecting_observer_)
 413     projecting_observer_->OnCastingSessionStartedOrStopped(started);
 414 #endif
 415 }
 416
 417 void Shell::OnOverviewModeStarting() {
 418   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeStarting());
 419 }
 420
 421 void Shell::OnOverviewModeEnding() {
 422   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeEnding());
 423 }
 424
 425 void Shell::OnMaximizeModeStarted() {
 426   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeStarted());
 427 }
 428
 429 void Shell::OnMaximizeModeEnded() {
 430   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeEnded());
 431 }
 432
 433 void Shell::OnRootWindowAdded(aura::Window* root_window) {
 434   FOR_EACH_OBSERVER(ShellObserver, observers_, OnRootWindowAdded(root_window));
 435 }
 436
 437 void Shell::CreateShelf() {
 438   RootWindowControllerList controllers = GetAllRootWindowControllers();
 439   for (RootWindowControllerList::iterator iter = controllers.begin();
 440        iter != controllers.end(); ++iter)
 441     (*iter)->shelf()->CreateShelf();
 442 }
 443
 444 void Shell::OnShelfCreatedForRootWindow(aura::Window* root_window) {
 445   FOR_EACH_OBSERVER(ShellObserver,
 446                     observers_,
 447                     OnShelfCreatedForRootWindow(root_window));
 448 }
 449
 450 void Shell::CreateKeyboard() {
 451   // TODO(bshe): Primary root window controller may not be the controller to
 452   // attach virtual keyboard. See http://crbug.com/303429
 453   InitKeyboard();
 454   GetPrimaryRootWindowController()->
 455       ActivateKeyboard(keyboard::KeyboardController::GetInstance());
 456 }
 457
 458 void Shell::DeactivateKeyboard() {
 459   if (keyboard::KeyboardController::GetInstance()) {
 460     RootWindowControllerList controllers = GetAllRootWindowControllers();
 461     for (RootWindowControllerList::iterator iter = controllers.begin();
 462         iter != controllers.end(); ++iter) {
 463       (*iter)->DeactivateKeyboard(keyboard::KeyboardController::GetInstance());
 464     }
 465   }
 466   keyboard::KeyboardController::ResetInstance(NULL);
 467 }
 468
 469 void Shell::ShowShelf() {
 470   RootWindowControllerList controllers = GetAllRootWindowControllers();
 471   for (RootWindowControllerList::iterator iter = controllers.begin();
 472        iter != controllers.end(); ++iter)
 473     (*iter)->ShowShelf();
 474 }
 475
 476 void Shell::AddShellObserver(ShellObserver* observer) {
 477   observers_.AddObserver(observer);
 478 }
 479
 480 void Shell::RemoveShellObserver(ShellObserver* observer) {
 481   observers_.RemoveObserver(observer);
 482 }
 483
 484 #if defined(OS_CHROMEOS)
 485 bool Shell::ShouldSaveDisplaySettings() {
 486   return !((maximize_mode_controller_->IsMaximizeModeWindowManagerEnabled() &&
 487             maximize_mode_controller_->
 488                 ignore_display_configuration_updates()) ||
 489            resolution_notification_controller_->DoesNotificationTimeout());
 490 }
 491 #endif
 492
 493 void Shell::UpdateShelfVisibility() {
 494   RootWindowControllerList controllers = GetAllRootWindowControllers();
 495   for (RootWindowControllerList::iterator iter = controllers.begin();
 496        iter != controllers.end(); ++iter)
 497     if ((*iter)->shelf())
 498       (*iter)->UpdateShelfVisibility();
 499 }
 500
 501 void Shell::SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior,
 502                                      aura::Window* root_window) {
 503   ash::ShelfLayoutManager::ForShelf(root_window)->SetAutoHideBehavior(behavior);
 504 }
 505
 506 ShelfAutoHideBehavior Shell::GetShelfAutoHideBehavior(
 507     aura::Window* root_window) const {
 508   return ash::ShelfLayoutManager::ForShelf(root_window)->auto_hide_behavior();
 509 }
 510
 511 void Shell::SetShelfAlignment(ShelfAlignment alignment,
 512                               aura::Window* root_window) {
 513   if (ash::ShelfLayoutManager::ForShelf(root_window)->SetAlignment(alignment)) {
 514     FOR_EACH_OBSERVER(
 515         ShellObserver, observers_, OnShelfAlignmentChanged(root_window));
 516   }
 517 }
 518
 519 ShelfAlignment Shell::GetShelfAlignment(const aura::Window* root_window) {
 520   return GetRootWindowController(root_window)
 521       ->GetShelfLayoutManager()
 522       ->GetAlignment();
 523 }
 524
 525 void Shell::SetDimming(bool should_dim) {
 526   RootWindowControllerList controllers = GetAllRootWindowControllers();
 527   for (RootWindowControllerList::iterator iter = controllers.begin();
 528        iter != controllers.end(); ++iter)
 529     (*iter)->screen_dimmer()->SetDimming(should_dim);
 530 }
 531
 532 void Shell::NotifyFullscreenStateChange(bool is_fullscreen,
 533                                         aura::Window* root_window) {
 534   FOR_EACH_OBSERVER(ShellObserver, observers_, OnFullscreenStateChanged(
 535       is_fullscreen, root_window));
 536 }
 537
 538 void Shell::CreateModalBackground(aura::Window* window) {
 539   if (!modality_filter_) {
 540     modality_filter_.reset(new SystemModalContainerEventFilter(this));
 541     AddPreTargetHandler(modality_filter_.get());
 542   }
 543   RootWindowControllerList controllers = GetAllRootWindowControllers();
 544   for (RootWindowControllerList::iterator iter = controllers.begin();
 545        iter != controllers.end(); ++iter)
 546     (*iter)->GetSystemModalLayoutManager(window)->CreateModalBackground();
 547 }
 548
 549 void Shell::OnModalWindowRemoved(aura::Window* removed) {
 550   RootWindowControllerList controllers = GetAllRootWindowControllers();
 551   bool activated = false;
 552   for (RootWindowControllerList::iterator iter = controllers.begin();
 553        iter != controllers.end() && !activated; ++iter) {
 554     activated = (*iter)->GetSystemModalLayoutManager(removed)->
 555         ActivateNextModalWindow();
 556   }
 557   if (!activated) {
 558     RemovePreTargetHandler(modality_filter_.get());
 559     modality_filter_.reset();
 560     for (RootWindowControllerList::iterator iter = controllers.begin();
 561          iter != controllers.end(); ++iter)
 562       (*iter)->GetSystemModalLayoutManager(removed)->DestroyModalBackground();
 563   }
 564 }
 565
 566 WebNotificationTray* Shell::GetWebNotificationTray() {
 567   return GetPrimaryRootWindowController()->shelf()->
 568       status_area_widget()->web_notification_tray();
 569 }
 570
 571 bool Shell::HasPrimaryStatusArea() {
 572   ShelfWidget* shelf = GetPrimaryRootWindowController()->shelf();
 573   return shelf && shelf->status_area_widget();
 574 }
 575
 576 SystemTray* Shell::GetPrimarySystemTray() {
 577   return GetPrimaryRootWindowController()->GetSystemTray();
 578 }
 579
 580 ShelfDelegate* Shell::GetShelfDelegate() {
 581   if (!shelf_delegate_) {
 582     shelf_model_.reset(new ShelfModel);
 583     // Creates ShelfItemDelegateManager before ShelfDelegate.
 584     shelf_item_delegate_manager_.reset(
 585         new ShelfItemDelegateManager(shelf_model_.get()));
 586
 587     shelf_delegate_.reset(delegate_->CreateShelfDelegate(shelf_model_.get()));
 588     scoped_ptr<ShelfItemDelegate> controller(new AppListShelfItemDelegate);
 589
 590     // Finding the shelf model's location of the app list and setting its
 591     // ShelfItemDelegate.
 592     int app_list_index = shelf_model_->GetItemIndexForType(TYPE_APP_LIST);
 593     DCHECK_GE(app_list_index, 0);
 594     ShelfID app_list_id = shelf_model_->items()[app_list_index].id;
 595     DCHECK(app_list_id);
 596     shelf_item_delegate_manager_->SetShelfItemDelegate(app_list_id,
 597                                                        controller.Pass());
 598     shelf_window_watcher_.reset(new ShelfWindowWatcher(
 599         shelf_model_.get(), shelf_item_delegate_manager_.get()));
 600   }
 601   return shelf_delegate_.get();
 602 }
 603
 604 void Shell::SetTouchHudProjectionEnabled(bool enabled) {
 605   if (is_touch_hud_projection_enabled_ == enabled)
 606     return;
 607
 608   is_touch_hud_projection_enabled_ = enabled;
 609   FOR_EACH_OBSERVER(ShellObserver, observers_,
 610                     OnTouchHudProjectionToggled(enabled));
 611 }
 612
 613 #if defined(OS_CHROMEOS)
 614 ash::FirstRunHelper* Shell::CreateFirstRunHelper() {
 615   return new ash::FirstRunHelperImpl;
 616 }
 617
 618 void Shell::SetCursorCompositingEnabled(bool enabled) {
 619   display_controller_->cursor_window_controller()->SetCursorCompositingEnabled(
 620       enabled);
 621   native_cursor_manager_->SetNativeCursorEnabled(!enabled);
 622 }
 623 #endif  // defined(OS_CHROMEOS)
 624
 625 void Shell::DoInitialWorkspaceAnimation() {
 626   return GetPrimaryRootWindowController()->workspace_controller()->
 627       DoInitialAnimation();
 628 }
 629
 630 ////////////////////////////////////////////////////////////////////////////////
 631 // Shell, private:
 632
 633 Shell::Shell(ShellDelegate* delegate)
 634     : target_root_window_(NULL),
 635       scoped_target_root_window_(NULL),
 636       delegate_(delegate),
 637       window_positioner_(new WindowPositioner),
 638       activation_client_(NULL),
 639       accelerometer_controller_(new AccelerometerController()),
 640 #if defined(OS_CHROMEOS)
 641       display_configurator_(new ui::DisplayConfigurator()),
 642 #endif  // defined(OS_CHROMEOS)
 643       native_cursor_manager_(new AshNativeCursorManager),
 644       cursor_manager_(
 645           scoped_ptr< ::wm::NativeCursorManager>(native_cursor_manager_)),
 646       simulate_modal_window_open_for_testing_(false),
 647       is_touch_hud_projection_enabled_(false) {
 648   DCHECK(delegate_.get());
 649   gpu_support_.reset(delegate_->CreateGPUSupport());
 650   display_manager_.reset(new DisplayManager);
 651   display_controller_.reset(new DisplayController);
 652 #if defined(OS_CHROMEOS) && defined(USE_X11)
 653   user_metrics_recorder_.reset(new UserMetricsRecorder);
 654 #endif  // defined(OS_CHROMEOS)
 655
 656 #if defined(OS_CHROMEOS)
 657   PowerStatus::Initialize();
 658 #endif
 659 }
 660
 661 Shell::~Shell() {
 662   TRACE_EVENT0("shutdown", "ash::Shell::Destructor");
 663
 664   delegate_->PreShutdown();
 665
 666   views::FocusManagerFactory::Install(NULL);
 667
 668   // Remove the focus from any window. This will prevent overhead and side
 669   // effects (e.g. crashes) from changing focus during shutdown.
 670   // See bug crbug.com/134502.
 671   aura::client::GetFocusClient(GetPrimaryRootWindow())->FocusWindow(NULL);
 672
 673   // Please keep in same order as in Init() because it's easy to miss one.
 674   if (window_modality_controller_)
 675     window_modality_controller_.reset();
 676 #if defined(OS_CHROMEOS) && defined(USE_X11)
 677   RemovePreTargetHandler(magnifier_key_scroll_handler_.get());
 678   magnifier_key_scroll_handler_.reset();
 679
 680   RemovePreTargetHandler(speech_feedback_handler_.get());
 681   speech_feedback_handler_.reset();
 682 #endif
 683   RemovePreTargetHandler(user_activity_detector_.get());
 684   RemovePreTargetHandler(overlay_filter_.get());
 685   RemovePreTargetHandler(input_method_filter_.get());
 686   RemovePreTargetHandler(accelerator_filter_.get());
 687   RemovePreTargetHandler(event_transformation_handler_.get());
 688   RemovePreTargetHandler(toplevel_window_event_handler_.get());
 689   RemovePostTargetHandler(toplevel_window_event_handler_.get());
 690   RemovePreTargetHandler(system_gesture_filter_.get());
 691   RemovePreTargetHandler(keyboard_metrics_filter_.get());
 692   RemovePreTargetHandler(mouse_cursor_filter_.get());
 693
 694   // TooltipController is deleted with the Shell so removing its references.
 695   RemovePreTargetHandler(tooltip_controller_.get());
 696
 697   // Destroy maximize mode controller early on since it has some observers which
 698   // need to be removed.
 699   maximize_mode_controller_->Shutdown();
 700   maximize_mode_controller_.reset();
 701
 702   // AppList needs to be released before shelf layout manager, which is
 703   // destroyed with shelf container in the loop below. However, app list
 704   // container is now on top of shelf container and released after it.
 705   // TODO(xiyuan): Move it back when app list container is no longer needed.
 706   app_list_controller_.reset();
 707
 708 #if defined(OS_CHROMEOS)
 709   // Destroy the LastWindowClosedLogoutReminder before the
 710   // LogoutConfirmationController.
 711   last_window_closed_logout_reminder_.reset();
 712
 713   // Destroy the LogoutConfirmationController before the SystemTrayDelegate.
 714   logout_confirmation_controller_.reset();
 715 #endif
 716
 717   // Destroy SystemTrayDelegate before destroying the status area(s).
 718   system_tray_delegate_->Shutdown();
 719   system_tray_delegate_.reset();
 720
 721   locale_notification_controller_.reset();
 722
 723   // Drag-and-drop must be canceled prior to close all windows.
 724   drag_drop_controller_.reset();
 725
 726   // Controllers who have WindowObserver added must be deleted
 727   // before |display_controller_| is deleted.
 728
 729 #if defined(OS_CHROMEOS)
 730   // VideoActivityNotifier must be deleted before |video_detector_| is
 731   // deleted because it's observing video activity through
 732   // VideoDetectorObserver interface.
 733   video_activity_notifier_.reset();
 734 #endif  // defined(OS_CHROMEOS)
 735   video_detector_.reset();
 736   high_contrast_controller_.reset();
 737
 738   shadow_controller_.reset();
 739   resize_shadow_controller_.reset();
 740
 741   window_cycle_controller_.reset();
 742   window_selector_controller_.reset();
 743   mru_window_tracker_.reset();
 744
 745   // |shelf_window_watcher_| has a weak pointer to |shelf_Model_|
 746   // and has window observers.
 747   shelf_window_watcher_.reset();
 748
 749   // Destroy all child windows including widgets.
 750   display_controller_->CloseChildWindows();
 751   display_controller_->CloseNonDesktopDisplay();
 752
 753   // Chrome implementation of shelf delegate depends on FocusClient,
 754   // so must be deleted before |focus_client_|.
 755   shelf_delegate_.reset();
 756   focus_client_.reset();
 757
 758   // Destroy SystemTrayNotifier after destroying SystemTray as TrayItems
 759   // needs to remove observers from it.
 760   system_tray_notifier_.reset();
 761
 762   // These need a valid Shell instance to clean up properly, so explicitly
 763   // delete them before invalidating the instance.
 764   // Alphabetical. TODO(oshima): sort.
 765   magnification_controller_.reset();
 766   partial_magnification_controller_.reset();
 767   tooltip_controller_.reset();
 768   event_client_.reset();
 769   nested_accelerator_controller_.reset();
 770   toplevel_window_event_handler_.reset();
 771   visibility_controller_.reset();
 772   // |shelf_item_delegate_manager_| observes |shelf_model_|. It must be
 773   // destroyed before |shelf_model_| is destroyed.
 774   shelf_item_delegate_manager_.reset();
 775   shelf_model_.reset();
 776
 777   power_button_controller_.reset();
 778   lock_state_controller_.reset();
 779
 780 #if defined(OS_CHROMEOS)
 781   resolution_notification_controller_.reset();
 782 #endif
 783   desktop_background_controller_.reset();
 784   mouse_cursor_filter_.reset();
 785
 786 #if defined(OS_CHROMEOS) && defined(USE_X11)
 787   touch_transformer_controller_.reset();
 788 #endif  // defined(OS_CHROMEOS) && defined(USE_X11)
 789
 790   // This also deletes all RootWindows. Note that we invoke Shutdown() on
 791   // DisplayController before resetting |display_controller_|, since destruction
 792   // of its owned RootWindowControllers relies on the value.
 793   display_manager_->CreateScreenForShutdown();
 794   display_controller_->Shutdown();
 795   display_controller_.reset();
 796   screen_position_controller_.reset();
 797   accessibility_delegate_.reset();
 798   new_window_delegate_.reset();
 799   media_delegate_.reset();
 800
 801   keyboard::KeyboardController::ResetInstance(NULL);
 802
 803 #if defined(OS_CHROMEOS)
 804   if (display_change_observer_)
 805     display_configurator_->RemoveObserver(display_change_observer_.get());
 806   if (display_configurator_animation_)
 807     display_configurator_->RemoveObserver(
 808         display_configurator_animation_.get());
 809   if (display_error_observer_)
 810     display_configurator_->RemoveObserver(display_error_observer_.get());
 811   if (projecting_observer_)
 812     display_configurator_->RemoveObserver(projecting_observer_.get());
 813   display_change_observer_.reset();
 814 #endif  // defined(OS_CHROMEOS)
 815
 816 #if defined(OS_CHROMEOS)
 817   PowerStatus::Shutdown();
 818 #endif
 819
 820   DCHECK(instance_ == this);
 821   instance_ = NULL;
 822 }
 823
 824 void Shell::Init(const ShellInitParams& init_params) {
 825   delegate_->PreInit();
 826   bool display_initialized = display_manager_->InitFromCommandLine();
 827 #if defined(OS_CHROMEOS)
 828   display_configurator_->Init(!gpu_support_->IsPanelFittingDisabled());
 829   display_configurator_animation_.reset(new DisplayConfiguratorAnimation());
 830   display_configurator_->AddObserver(display_configurator_animation_.get());
 831
 832   projecting_observer_.reset(new ProjectingObserver());
 833   display_configurator_->AddObserver(projecting_observer_.get());
 834
 835   if (!display_initialized && base::SysInfo::IsRunningOnChromeOS()) {
 836     display_change_observer_.reset(new DisplayChangeObserver);
 837     // Register |display_change_observer_| first so that the rest of
 838     // observer gets invoked after the root windows are configured.
 839     display_configurator_->AddObserver(display_change_observer_.get());
 840     display_error_observer_.reset(new DisplayErrorObserver());
 841     display_configurator_->AddObserver(display_error_observer_.get());
 842     display_configurator_->set_state_controller(display_change_observer_.get());
 843     display_configurator_->set_mirroring_controller(display_manager_.get());
 844     display_configurator_->ForceInitialConfigure(
 845         delegate_->IsFirstRunAfterBoot() ? kChromeOsBootColor : 0);
 846     display_initialized = true;
 847   }
 848 #endif  // defined(OS_CHROMEOS)
 849   if (!display_initialized)
 850     display_manager_->InitDefaultDisplay();
 851
 852   display_manager_->InitFontParams();
 853
 854   // Install the custom factory first so that views::FocusManagers for Tray,
 855   // Shelf, and WallPaper could be created by the factory.
 856   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
 857
 858   aura::Env::CreateInstance(true);
 859   aura::Env::GetInstance()->set_context_factory(init_params.context_factory);
 860
 861   // The WindowModalityController needs to be at the front of the input event
 862   // pretarget handler list to ensure that it processes input events when modal
 863   // windows are active.
 864   window_modality_controller_.reset(
 865       new ::wm::WindowModalityController(this));
 866
 867   env_filter_.reset(new ::wm::CompoundEventFilter);
 868   AddPreTargetHandler(env_filter_.get());
 869
 870   ::wm::FocusController* focus_controller =
 871       new ::wm::FocusController(new wm::AshFocusRules);
 872   focus_client_.reset(focus_controller);
 873   activation_client_ = focus_controller;
 874   activation_client_->AddObserver(this);
 875   focus_cycler_.reset(new FocusCycler());
 876
 877   screen_position_controller_.reset(new ScreenPositionController);
 878
 879   display_controller_->Start();
 880   display_controller_->CreatePrimaryHost(
 881       ShellInitParamsToAshWindowTreeHostInitParams(init_params));
 882   aura::Window* root_window = display_controller_->GetPrimaryRootWindow();
 883   target_root_window_ = root_window;
 884
 885 #if defined(OS_CHROMEOS)
 886   resolution_notification_controller_.reset(
 887       new ResolutionNotificationController);
 888 #endif
 889
 890   cursor_manager_.SetDisplay(GetScreen()->GetPrimaryDisplay());
 891
 892   nested_accelerator_controller_.reset(
 893       new ::wm::NestedAcceleratorController(new NestedAcceleratorDelegate));
 894   accelerator_controller_.reset(new AcceleratorController);
 895   maximize_mode_controller_.reset(new MaximizeModeController());
 896
 897 #if defined(OS_CHROMEOS) && defined(USE_X11)
 898   magnifier_key_scroll_handler_ = MagnifierKeyScroller::CreateHandler().Pass();
 899   AddPreTargetHandler(magnifier_key_scroll_handler_.get());
 900   speech_feedback_handler_ = SpokenFeedbackToggler::CreateHandler().Pass();
 901   AddPreTargetHandler(speech_feedback_handler_.get());
 902 #endif
 903
 904   // The order in which event filters are added is significant.
 905
 906   // wm::UserActivityDetector passes events to observers, so let them get
 907   // rewritten first.
 908   user_activity_detector_.reset(new ::wm::UserActivityDetector);
 909   AddPreTargetHandler(user_activity_detector_.get());
 910
 911   overlay_filter_.reset(new OverlayEventFilter);
 912   AddPreTargetHandler(overlay_filter_.get());
 913   AddShellObserver(overlay_filter_.get());
 914
 915   input_method_filter_.reset(new ::wm::InputMethodEventFilter(
 916       root_window->GetHost()->GetAcceleratedWidget()));
 917   AddPreTargetHandler(input_method_filter_.get());
 918
 919   accelerator_filter_.reset(new ::wm::AcceleratorFilter(
 920       scoped_ptr< ::wm::AcceleratorDelegate>(new AcceleratorDelegate).Pass()));
 921   AddPreTargetHandler(accelerator_filter_.get());
 922
 923   event_transformation_handler_.reset(new EventTransformationHandler);
 924   AddPreTargetHandler(event_transformation_handler_.get());
 925
 926   toplevel_window_event_handler_.reset(new ToplevelWindowEventHandler);
 927
 928   system_gesture_filter_.reset(new SystemGestureEventFilter);
 929   AddPreTargetHandler(system_gesture_filter_.get());
 930
 931   keyboard_metrics_filter_.reset(new KeyboardUMAEventFilter);
 932   AddPreTargetHandler(keyboard_metrics_filter_.get());
 933
 934   // The keyboard system must be initialized before the RootWindowController is
 935   // created.
 936 #if defined(OS_CHROMEOS)
 937     keyboard::InitializeKeyboard();
 938 #endif
 939
 940 #if defined(OS_CHROMEOS)
 941   sticky_keys_controller_.reset(new StickyKeysController);
 942 #endif
 943
 944   lock_state_controller_.reset(new LockStateController);
 945   power_button_controller_.reset(new PowerButtonController(
 946       lock_state_controller_.get()));
 947 #if defined(OS_CHROMEOS)
 948   // Pass the initial display state to PowerButtonController.
 949   power_button_controller_->OnDisplayModeChanged(
 950       display_configurator_->cached_displays());
 951 #endif
 952   AddShellObserver(lock_state_controller_.get());
 953
 954   drag_drop_controller_.reset(new DragDropController);
 955   mouse_cursor_filter_.reset(new MouseCursorEventFilter());
 956   PrependPreTargetHandler(mouse_cursor_filter_.get());
 957
 958   // Create Controllers that may need root window.
 959   // TODO(oshima): Move as many controllers before creating
 960   // RootWindowController as possible.
 961   visibility_controller_.reset(new AshVisibilityController);
 962
 963   magnification_controller_.reset(
 964       MagnificationController::CreateInstance());
 965   mru_window_tracker_.reset(new MruWindowTracker(activation_client_));
 966
 967   partial_magnification_controller_.reset(
 968       new PartialMagnificationController());
 969
 970   autoclick_controller_.reset(AutoclickController::CreateInstance());
 971
 972   high_contrast_controller_.reset(new HighContrastController);
 973   video_detector_.reset(new VideoDetector);
 974   window_selector_controller_.reset(new WindowSelectorController());
 975   window_cycle_controller_.reset(new WindowCycleController());
 976
 977   tooltip_controller_.reset(
 978       new views::corewm::TooltipController(
 979           scoped_ptr<views::corewm::Tooltip>(
 980               new views::corewm::TooltipAura(gfx::SCREEN_TYPE_ALTERNATE))));
 981   AddPreTargetHandler(tooltip_controller_.get());
 982
 983   event_client_.reset(new EventClientImpl);
 984
 985   // This controller needs to be set before SetupManagedWindowMode.
 986   desktop_background_controller_.reset(new DesktopBackgroundController());
 987   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
 988
 989   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
 990   accessibility_delegate_.reset(delegate_->CreateAccessibilityDelegate());
 991   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
 992   media_delegate_.reset(delegate_->CreateMediaDelegate());
 993
 994   resize_shadow_controller_.reset(new ResizeShadowController());
 995   shadow_controller_.reset(
 996       new ::wm::ShadowController(activation_client_));
 997
 998   // Create system_tray_notifier_ before the delegate.
 999   system_tray_notifier_.reset(new ash::SystemTrayNotifier());
1000
1001   // Initialize system_tray_delegate_ before initializing StatusAreaWidget.
1002   system_tray_delegate_.reset(delegate()->CreateSystemTrayDelegate());
1003   DCHECK(system_tray_delegate_.get());
1004
1005   locale_notification_controller_.reset(new LocaleNotificationController);
1006
1007   // Initialize system_tray_delegate_ after StatusAreaWidget is created.
1008   system_tray_delegate_->Initialize();
1009
1010 #if defined(OS_CHROMEOS)
1011   // Create the LogoutConfirmationController after the SystemTrayDelegate.
1012   logout_confirmation_controller_.reset(new LogoutConfirmationController(
1013       base::Bind(&SystemTrayDelegate::SignOut,
1014                  base::Unretained(system_tray_delegate_.get()))));
1015 #endif
1016
1017 #if defined(OS_CHROMEOS) && defined(USE_X11)
1018   // Create TouchTransformerController before DisplayController::InitDisplays()
1019   // since TouchTransformerController listens on
1020   // DisplayController::Observer::OnDisplaysInitialized().
1021   touch_transformer_controller_.reset(new TouchTransformerController());
1022 #endif  // defined(OS_CHROMEOS) && defined(USE_X11)
1023
1024   display_controller_->InitDisplays();
1025
1026   // It needs to be created after RootWindowController has been created
1027   // (which calls OnWindowResized has been called, otherwise the
1028   // widget will not paint when restoring after a browser crash.  Also it needs
1029   // to be created after InitSecondaryDisplays() to initialize the wallpapers in
1030   // the correct size.
1031   user_wallpaper_delegate_->InitializeWallpaper();
1032
1033   if (initially_hide_cursor_)
1034     cursor_manager_.HideCursor();
1035   cursor_manager_.SetCursor(ui::kCursorPointer);
1036
1037 #if defined(OS_CHROMEOS)
1038   // Set accelerator controller delegates.
1039   accelerator_controller_->SetBrightnessControlDelegate(
1040       scoped_ptr<ash::BrightnessControlDelegate>(
1041           new ash::system::BrightnessControllerChromeos).Pass());
1042
1043   power_event_observer_.reset(new PowerEventObserver());
1044   user_activity_notifier_.reset(
1045       new ui::UserActivityPowerManagerNotifier(user_activity_detector_.get()));
1046   video_activity_notifier_.reset(
1047       new VideoActivityNotifier(video_detector_.get()));
1048   bluetooth_notification_controller_.reset(new BluetoothNotificationController);
1049   last_window_closed_logout_reminder_.reset(new LastWindowClosedLogoutReminder);
1050 #endif
1051
1052   weak_display_manager_factory_.reset(
1053       new base::WeakPtrFactory<DisplayManager>(display_manager_.get()));
1054   // The compositor thread and main message loop have to be running in
1055   // order to create mirror window. Run it after the main message loop
1056   // is started.
1057   base::MessageLoopForUI::current()->PostTask(
1058       FROM_HERE,
1059       base::Bind(&DisplayManager::CreateMirrorWindowIfAny,
1060                  weak_display_manager_factory_->GetWeakPtr()));
1061 }
1062
1063 void Shell::InitKeyboard() {
1064   if (keyboard::IsKeyboardEnabled()) {
1065     if (keyboard::KeyboardController::GetInstance()) {
1066       RootWindowControllerList controllers = GetAllRootWindowControllers();
1067       for (RootWindowControllerList::iterator iter = controllers.begin();
1068            iter != controllers.end(); ++iter) {
1069         (*iter)->DeactivateKeyboard(
1070             keyboard::KeyboardController::GetInstance());
1071       }
1072     }
1073     keyboard::KeyboardControllerProxy* proxy =
1074         delegate_->CreateKeyboardControllerProxy();
1075     keyboard::KeyboardController::ResetInstance(
1076         new keyboard::KeyboardController(proxy));
1077   }
1078 }
1079
1080 void Shell::InitRootWindow(aura::Window* root_window) {
1081   DCHECK(activation_client_);
1082   DCHECK(visibility_controller_.get());
1083   DCHECK(drag_drop_controller_.get());
1084
1085   aura::client::SetFocusClient(root_window, focus_client_.get());
1086   input_method_filter_->SetInputMethodPropertyInRootWindow(root_window);
1087   aura::client::SetActivationClient(root_window, activation_client_);
1088   ::wm::FocusController* focus_controller =
1089       static_cast< ::wm::FocusController*>(activation_client_);
1090   root_window->AddPreTargetHandler(focus_controller);
1091   aura::client::SetVisibilityClient(root_window, visibility_controller_.get());
1092   aura::client::SetDragDropClient(root_window, drag_drop_controller_.get());
1093   aura::client::SetScreenPositionClient(root_window,
1094                                         screen_position_controller_.get());
1095   aura::client::SetCursorClient(root_window, &cursor_manager_);
1096   aura::client::SetTooltipClient(root_window, tooltip_controller_.get());
1097   aura::client::SetEventClient(root_window, event_client_.get());
1098
1099   aura::client::SetWindowMoveClient(root_window,
1100       toplevel_window_event_handler_.get());
1101   root_window->AddPreTargetHandler(toplevel_window_event_handler_.get());
1102   root_window->AddPostTargetHandler(toplevel_window_event_handler_.get());
1103
1104   if (nested_accelerator_controller_) {
1105     aura::client::SetDispatcherClient(root_window,
1106                                       nested_accelerator_controller_.get());
1107   }
1108 }
1109
1110 bool Shell::CanWindowReceiveEvents(aura::Window* window) {
1111   RootWindowControllerList controllers = GetAllRootWindowControllers();
1112   for (RootWindowControllerList::iterator iter = controllers.begin();
1113        iter != controllers.end(); ++iter) {
1114     SystemModalContainerLayoutManager* layout_manager =
1115         (*iter)->GetSystemModalLayoutManager(window);
1116     if (layout_manager && layout_manager->CanWindowReceiveEvents(window))
1117       return true;
1118     // Allow events to fall through to the virtual keyboard even if displaying
1119     // a system modal dialog.
1120     if ((*iter)->IsVirtualKeyboardWindow(window))
1121       return true;
1122   }
1123
1124   return false;
1125 }
1126
1127 ////////////////////////////////////////////////////////////////////////////////
1128 // Shell, ui::EventTarget overrides:
1129
1130 bool Shell::CanAcceptEvent(const ui::Event& event) {
1131   return true;
1132 }
1133
1134 ui::EventTarget* Shell::GetParentTarget() {
1135   return aura::Env::GetInstance();
1136 }
1137
1138 scoped_ptr<ui::EventTargetIterator> Shell::GetChildIterator() const {
1139   return scoped_ptr<ui::EventTargetIterator>();
1140 }
1141
1142 ui::EventTargeter* Shell::GetEventTargeter() {
1143   NOTREACHED();
1144   return NULL;
1145 }
1146
1147 void Shell::OnEvent(ui::Event* event) {
1148 }
1149
1150 ////////////////////////////////////////////////////////////////////////////////
1151 // Shell, aura::client::ActivationChangeObserver implementation:
1152
1153 void Shell::OnWindowActivated(aura::Window* gained_active,
1154                               aura::Window* lost_active) {
1155   if (gained_active)
1156     target_root_window_ = gained_active->GetRootWindow();
1157 }
1158
1159 }  // namespace ash