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 "ui/gfx/x/x11_types.h"
 122 #endif  // defined(USE_X11)
 123 #include "ash/ash_constants.h"
 124 #include "ash/content/display/screen_orientation_delegate_chromeos.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 "ash/touch/touch_transformer_controller.h"
 139 #include "ash/virtual_keyboard_controller.h"
 140 #include "base/bind_helpers.h"
 141 #include "base/sys_info.h"
 142 #include "chromeos/dbus/dbus_thread_manager.h"
 143 #include "ui/chromeos/user_activity_power_manager_notifier.h"
 144 #include "ui/display/chromeos/display_configurator.h"
 145 #endif  // defined(OS_CHROMEOS)
 146
 147 namespace ash {
 148
 149 namespace {
 150
 151 using aura::Window;
 152 using views::Widget;
 153
 154 // A Corewm VisibilityController subclass that calls the Ash animation routine
 155 // so we can pick up our extended animations. See ash/wm/window_animations.h.
 156 class AshVisibilityController : public ::wm::VisibilityController {
 157  public:
 158   AshVisibilityController() {}
 159   ~AshVisibilityController() override {}
 160
 161  private:
 162   // Overridden from ::wm::VisibilityController:
 163   bool CallAnimateOnChildWindowVisibilityChanged(aura::Window* window,
 164                                                  bool visible) override {
 165     return AnimateOnChildWindowVisibilityChanged(window, visible);
 166   }
 167
 168   DISALLOW_COPY_AND_ASSIGN(AshVisibilityController);
 169 };
 170
 171 AshWindowTreeHostInitParams ShellInitParamsToAshWindowTreeHostInitParams(
 172     const ShellInitParams& shell_init_params) {
 173   AshWindowTreeHostInitParams ash_init_params;
 174 #if defined(OS_WIN)
 175   ash_init_params.remote_hwnd = shell_init_params.remote_hwnd;
 176 #endif
 177   return ash_init_params;
 178 }
 179
 180 }  // namespace
 181
 182 // static
 183 Shell* Shell::instance_ = NULL;
 184 // static
 185 bool Shell::initially_hide_cursor_ = false;
 186
 187 ////////////////////////////////////////////////////////////////////////////////
 188 // Shell, public:
 189
 190 // static
 191 Shell* Shell::CreateInstance(const ShellInitParams& init_params) {
 192   CHECK(!instance_);
 193   instance_ = new Shell(init_params.delegate);
 194   instance_->Init(init_params);
 195   return instance_;
 196 }
 197
 198 // static
 199 Shell* Shell::GetInstance() {
 200   CHECK(instance_);
 201   return instance_;
 202 }
 203
 204 // static
 205 bool Shell::HasInstance() {
 206   return !!instance_;
 207 }
 208
 209 // static
 210 void Shell::DeleteInstance() {
 211   delete instance_;
 212   instance_ = NULL;
 213 }
 214
 215 // static
 216 RootWindowController* Shell::GetPrimaryRootWindowController() {
 217   CHECK(HasInstance());
 218   return GetRootWindowController(GetPrimaryRootWindow());
 219 }
 220
 221 // static
 222 Shell::RootWindowControllerList Shell::GetAllRootWindowControllers() {
 223   CHECK(HasInstance());
 224   return Shell::GetInstance()->display_controller()->
 225       GetAllRootWindowControllers();
 226 }
 227
 228 // static
 229 aura::Window* Shell::GetPrimaryRootWindow() {
 230   CHECK(HasInstance());
 231   return GetInstance()->display_controller()->GetPrimaryRootWindow();
 232 }
 233
 234 // static
 235 aura::Window* Shell::GetTargetRootWindow() {
 236   CHECK(HasInstance());
 237   Shell* shell = GetInstance();
 238   if (shell->scoped_target_root_window_)
 239     return shell->scoped_target_root_window_;
 240   return shell->target_root_window_;
 241 }
 242
 243 // static
 244 gfx::Screen* Shell::GetScreen() {
 245   return gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_ALTERNATE);
 246 }
 247
 248 // static
 249 aura::Window::Windows Shell::GetAllRootWindows() {
 250   CHECK(HasInstance());
 251   return Shell::GetInstance()->display_controller()->
 252       GetAllRootWindows();
 253 }
 254
 255 // static
 256 aura::Window* Shell::GetContainer(aura::Window* root_window,
 257                                   int container_id) {
 258   return root_window->GetChildById(container_id);
 259 }
 260
 261 // static
 262 const aura::Window* Shell::GetContainer(const aura::Window* root_window,
 263                                         int container_id) {
 264   return root_window->GetChildById(container_id);
 265 }
 266
 267 // static
 268 std::vector<aura::Window*> Shell::GetContainersFromAllRootWindows(
 269     int container_id,
 270     aura::Window* priority_root) {
 271   std::vector<aura::Window*> containers;
 272   aura::Window::Windows root_windows = GetAllRootWindows();
 273   for (aura::Window::Windows::const_iterator it = root_windows.begin();
 274        it != root_windows.end(); ++it) {
 275     aura::Window* container = (*it)->GetChildById(container_id);
 276     if (container) {
 277       if (priority_root && priority_root->Contains(container))
 278         containers.insert(containers.begin(), container);
 279       else
 280         containers.push_back(container);
 281     }
 282   }
 283   return containers;
 284 }
 285
 286 void Shell::ShowContextMenu(const gfx::Point& location_in_screen,
 287                             ui::MenuSourceType source_type) {
 288   // No context menus if there is no session with an active user.
 289   if (!session_state_delegate_->NumberOfLoggedInUsers())
 290     return;
 291   // No context menus when screen is locked.
 292   if (session_state_delegate_->IsScreenLocked())
 293     return;
 294
 295   aura::Window* root =
 296       wm::GetRootWindowMatching(gfx::Rect(location_in_screen, gfx::Size()));
 297   GetRootWindowController(root)
 298       ->ShowContextMenu(location_in_screen, source_type);
 299 }
 300
 301 void Shell::ShowAppList(aura::Window* window) {
 302   // If the context window is not given, show it on the target root window.
 303   if (!window)
 304     window = GetTargetRootWindow();
 305   if (!app_list_controller_)
 306     app_list_controller_.reset(new AppListController);
 307   app_list_controller_->Show(window);
 308 }
 309
 310 void Shell::DismissAppList() {
 311   if (!app_list_controller_)
 312     return;
 313   app_list_controller_->Dismiss();
 314 }
 315
 316 void Shell::ToggleAppList(aura::Window* window) {
 317   if (app_list_controller_ && app_list_controller_->IsVisible()) {
 318     DismissAppList();
 319     return;
 320   }
 321
 322   ShowAppList(window);
 323 }
 324
 325 bool Shell::GetAppListTargetVisibility() const {
 326   return app_list_controller_.get() &&
 327       app_list_controller_->GetTargetVisibility();
 328 }
 329
 330 aura::Window* Shell::GetAppListWindow() {
 331   return app_list_controller_.get() ? app_list_controller_->GetWindow() : NULL;
 332 }
 333
 334 app_list::AppListView* Shell::GetAppListView() {
 335   return app_list_controller_.get() ? app_list_controller_->GetView() : NULL;
 336 }
 337
 338 bool Shell::IsSystemModalWindowOpen() const {
 339   if (simulate_modal_window_open_for_testing_)
 340     return true;
 341   const std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 342       kShellWindowId_SystemModalContainer, NULL);
 343   for (std::vector<aura::Window*>::const_iterator cit = containers.begin();
 344        cit != containers.end(); ++cit) {
 345     for (aura::Window::Windows::const_iterator wit = (*cit)->children().begin();
 346          wit != (*cit)->children().end(); ++wit) {
 347       if ((*wit)->GetProperty(aura::client::kModalKey) ==
 348           ui::MODAL_TYPE_SYSTEM && (*wit)->TargetVisibility()) {
 349         return true;
 350       }
 351     }
 352   }
 353   return false;
 354 }
 355
 356 views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
 357     views::Widget* widget) {
 358   // Use translucent-style window frames for dialogs.
 359   return new CustomFrameViewAsh(widget);
 360 }
 361
 362 void Shell::RotateFocus(Direction direction) {
 363   focus_cycler_->RotateFocus(direction == FORWARD ? FocusCycler::FORWARD
 364                                                   : FocusCycler::BACKWARD);
 365 }
 366
 367 void Shell::SetDisplayWorkAreaInsets(Window* contains,
 368                                      const gfx::Insets& insets) {
 369   if (!display_controller_->UpdateWorkAreaOfDisplayNearestWindow(
 370           contains, insets)) {
 371     return;
 372   }
 373   FOR_EACH_OBSERVER(ShellObserver, observers_,
 374                     OnDisplayWorkAreaInsetsChanged());
 375 }
 376
 377 void Shell::OnLoginStateChanged(user::LoginStatus status) {
 378   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLoginStateChanged(status));
 379 }
 380
 381 void Shell::OnLoginUserProfilePrepared() {
 382   CreateShelf();
 383   CreateKeyboard();
 384 }
 385
 386 void Shell::UpdateAfterLoginStatusChange(user::LoginStatus status) {
 387   RootWindowControllerList controllers = GetAllRootWindowControllers();
 388   for (RootWindowControllerList::iterator iter = controllers.begin();
 389        iter != controllers.end(); ++iter)
 390     (*iter)->UpdateAfterLoginStatusChange(status);
 391 }
 392
 393 void Shell::OnAppTerminating() {
 394   FOR_EACH_OBSERVER(ShellObserver, observers_, OnAppTerminating());
 395 }
 396
 397 void Shell::OnLockStateChanged(bool locked) {
 398   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLockStateChanged(locked));
 399 #ifndef NDEBUG
 400   // Make sure that there is no system modal in Lock layer when unlocked.
 401   if (!locked) {
 402     std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 403         kShellWindowId_LockSystemModalContainer, GetPrimaryRootWindow());
 404     for (std::vector<aura::Window*>::const_iterator iter = containers.begin();
 405          iter != containers.end(); ++iter) {
 406       DCHECK_EQ(0u, (*iter)->children().size());
 407     }
 408   }
 409 #endif
 410 }
 411
 412 void Shell::OnCastingSessionStartedOrStopped(bool started) {
 413 #if defined(OS_CHROMEOS) && defined(USE_X11)
 414   if (projecting_observer_)
 415     projecting_observer_->OnCastingSessionStartedOrStopped(started);
 416 #endif
 417 }
 418
 419 void Shell::OnOverviewModeStarting() {
 420   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeStarting());
 421 }
 422
 423 void Shell::OnOverviewModeEnding() {
 424   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeEnding());
 425 }
 426
 427 void Shell::OnMaximizeModeStarted() {
 428   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeStarted());
 429 }
 430
 431 void Shell::OnMaximizeModeEnded() {
 432   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeEnded());
 433 }
 434
 435 void Shell::OnRootWindowAdded(aura::Window* root_window) {
 436   FOR_EACH_OBSERVER(ShellObserver, observers_, OnRootWindowAdded(root_window));
 437 }
 438
 439 void Shell::CreateShelf() {
 440   RootWindowControllerList controllers = GetAllRootWindowControllers();
 441   for (RootWindowControllerList::iterator iter = controllers.begin();
 442        iter != controllers.end(); ++iter)
 443     (*iter)->shelf()->CreateShelf();
 444 }
 445
 446 void Shell::OnShelfCreatedForRootWindow(aura::Window* root_window) {
 447   FOR_EACH_OBSERVER(ShellObserver,
 448                     observers_,
 449                     OnShelfCreatedForRootWindow(root_window));
 450 }
 451
 452 void Shell::CreateKeyboard() {
 453   // TODO(bshe): Primary root window controller may not be the controller to
 454   // attach virtual keyboard. See http://crbug.com/303429
 455   InitKeyboard();
 456   GetPrimaryRootWindowController()->
 457       ActivateKeyboard(keyboard::KeyboardController::GetInstance());
 458 }
 459
 460 void Shell::DeactivateKeyboard() {
 461   if (keyboard::KeyboardController::GetInstance()) {
 462     RootWindowControllerList controllers = GetAllRootWindowControllers();
 463     for (RootWindowControllerList::iterator iter = controllers.begin();
 464         iter != controllers.end(); ++iter) {
 465       (*iter)->DeactivateKeyboard(keyboard::KeyboardController::GetInstance());
 466     }
 467   }
 468   keyboard::KeyboardController::ResetInstance(NULL);
 469 }
 470
 471 void Shell::ShowShelf() {
 472   RootWindowControllerList controllers = GetAllRootWindowControllers();
 473   for (RootWindowControllerList::iterator iter = controllers.begin();
 474        iter != controllers.end(); ++iter)
 475     (*iter)->ShowShelf();
 476 }
 477
 478 void Shell::AddShellObserver(ShellObserver* observer) {
 479   observers_.AddObserver(observer);
 480 }
 481
 482 void Shell::RemoveShellObserver(ShellObserver* observer) {
 483   observers_.RemoveObserver(observer);
 484 }
 485
 486 #if defined(OS_CHROMEOS)
 487 bool Shell::ShouldSaveDisplaySettings() {
 488   return !((maximize_mode_controller_->IsMaximizeModeWindowManagerEnabled() &&
 489             maximize_mode_controller_->
 490                 ignore_display_configuration_updates()) ||
 491            resolution_notification_controller_->DoesNotificationTimeout());
 492 }
 493 #endif
 494
 495 void Shell::UpdateShelfVisibility() {
 496   RootWindowControllerList controllers = GetAllRootWindowControllers();
 497   for (RootWindowControllerList::iterator iter = controllers.begin();
 498        iter != controllers.end(); ++iter)
 499     if ((*iter)->shelf())
 500       (*iter)->UpdateShelfVisibility();
 501 }
 502
 503 void Shell::SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior,
 504                                      aura::Window* root_window) {
 505   ash::ShelfLayoutManager::ForShelf(root_window)->SetAutoHideBehavior(behavior);
 506 }
 507
 508 ShelfAutoHideBehavior Shell::GetShelfAutoHideBehavior(
 509     aura::Window* root_window) const {
 510   return ash::ShelfLayoutManager::ForShelf(root_window)->auto_hide_behavior();
 511 }
 512
 513 void Shell::SetShelfAlignment(ShelfAlignment alignment,
 514                               aura::Window* root_window) {
 515   if (ash::ShelfLayoutManager::ForShelf(root_window)->SetAlignment(alignment)) {
 516     FOR_EACH_OBSERVER(
 517         ShellObserver, observers_, OnShelfAlignmentChanged(root_window));
 518   }
 519 }
 520
 521 ShelfAlignment Shell::GetShelfAlignment(const aura::Window* root_window) {
 522   return GetRootWindowController(root_window)
 523       ->GetShelfLayoutManager()
 524       ->GetAlignment();
 525 }
 526
 527 void Shell::SetDimming(bool should_dim) {
 528   RootWindowControllerList controllers = GetAllRootWindowControllers();
 529   for (RootWindowControllerList::iterator iter = controllers.begin();
 530        iter != controllers.end(); ++iter)
 531     (*iter)->screen_dimmer()->SetDimming(should_dim);
 532 }
 533
 534 void Shell::NotifyFullscreenStateChange(bool is_fullscreen,
 535                                         aura::Window* root_window) {
 536   FOR_EACH_OBSERVER(ShellObserver, observers_, OnFullscreenStateChanged(
 537       is_fullscreen, root_window));
 538 }
 539
 540 void Shell::CreateModalBackground(aura::Window* window) {
 541   if (!modality_filter_) {
 542     modality_filter_.reset(new SystemModalContainerEventFilter(this));
 543     AddPreTargetHandler(modality_filter_.get());
 544   }
 545   RootWindowControllerList controllers = GetAllRootWindowControllers();
 546   for (RootWindowControllerList::iterator iter = controllers.begin();
 547        iter != controllers.end(); ++iter)
 548     (*iter)->GetSystemModalLayoutManager(window)->CreateModalBackground();
 549 }
 550
 551 void Shell::OnModalWindowRemoved(aura::Window* removed) {
 552   RootWindowControllerList controllers = GetAllRootWindowControllers();
 553   bool activated = false;
 554   for (RootWindowControllerList::iterator iter = controllers.begin();
 555        iter != controllers.end() && !activated; ++iter) {
 556     activated = (*iter)->GetSystemModalLayoutManager(removed)->
 557         ActivateNextModalWindow();
 558   }
 559   if (!activated) {
 560     RemovePreTargetHandler(modality_filter_.get());
 561     modality_filter_.reset();
 562     for (RootWindowControllerList::iterator iter = controllers.begin();
 563          iter != controllers.end(); ++iter)
 564       (*iter)->GetSystemModalLayoutManager(removed)->DestroyModalBackground();
 565   }
 566 }
 567
 568 WebNotificationTray* Shell::GetWebNotificationTray() {
 569   return GetPrimaryRootWindowController()->shelf()->
 570       status_area_widget()->web_notification_tray();
 571 }
 572
 573 bool Shell::HasPrimaryStatusArea() {
 574   ShelfWidget* shelf = GetPrimaryRootWindowController()->shelf();
 575   return shelf && shelf->status_area_widget();
 576 }
 577
 578 SystemTray* Shell::GetPrimarySystemTray() {
 579   return GetPrimaryRootWindowController()->GetSystemTray();
 580 }
 581
 582 ShelfDelegate* Shell::GetShelfDelegate() {
 583   if (!shelf_delegate_) {
 584     shelf_model_.reset(new ShelfModel);
 585     // Creates ShelfItemDelegateManager before ShelfDelegate.
 586     shelf_item_delegate_manager_.reset(
 587         new ShelfItemDelegateManager(shelf_model_.get()));
 588
 589     shelf_delegate_.reset(delegate_->CreateShelfDelegate(shelf_model_.get()));
 590     scoped_ptr<ShelfItemDelegate> controller(new AppListShelfItemDelegate);
 591
 592     // Finding the shelf model's location of the app list and setting its
 593     // ShelfItemDelegate.
 594     int app_list_index = shelf_model_->GetItemIndexForType(TYPE_APP_LIST);
 595     DCHECK_GE(app_list_index, 0);
 596     ShelfID app_list_id = shelf_model_->items()[app_list_index].id;
 597     DCHECK(app_list_id);
 598     shelf_item_delegate_manager_->SetShelfItemDelegate(app_list_id,
 599                                                        controller.Pass());
 600     shelf_window_watcher_.reset(new ShelfWindowWatcher(
 601         shelf_model_.get(), shelf_item_delegate_manager_.get()));
 602   }
 603   return shelf_delegate_.get();
 604 }
 605
 606 void Shell::SetTouchHudProjectionEnabled(bool enabled) {
 607   if (is_touch_hud_projection_enabled_ == enabled)
 608     return;
 609
 610   is_touch_hud_projection_enabled_ = enabled;
 611   FOR_EACH_OBSERVER(ShellObserver, observers_,
 612                     OnTouchHudProjectionToggled(enabled));
 613 }
 614
 615 #if defined(OS_CHROMEOS)
 616 ash::FirstRunHelper* Shell::CreateFirstRunHelper() {
 617   return new ash::FirstRunHelperImpl;
 618 }
 619
 620 void Shell::SetCursorCompositingEnabled(bool enabled) {
 621   display_controller_->cursor_window_controller()->SetCursorCompositingEnabled(
 622       enabled);
 623   native_cursor_manager_->SetNativeCursorEnabled(!enabled);
 624 }
 625 #endif  // defined(OS_CHROMEOS)
 626
 627 void Shell::DoInitialWorkspaceAnimation() {
 628   return GetPrimaryRootWindowController()->workspace_controller()->
 629       DoInitialAnimation();
 630 }
 631
 632 ////////////////////////////////////////////////////////////////////////////////
 633 // Shell, private:
 634
 635 Shell::Shell(ShellDelegate* delegate)
 636     : target_root_window_(NULL),
 637       scoped_target_root_window_(NULL),
 638       delegate_(delegate),
 639       window_positioner_(new WindowPositioner),
 640       activation_client_(NULL),
 641       accelerometer_controller_(new AccelerometerController()),
 642 #if defined(OS_CHROMEOS)
 643       display_configurator_(new ui::DisplayConfigurator()),
 644 #endif  // defined(OS_CHROMEOS)
 645       native_cursor_manager_(new AshNativeCursorManager),
 646       cursor_manager_(
 647           scoped_ptr< ::wm::NativeCursorManager>(native_cursor_manager_)),
 648       simulate_modal_window_open_for_testing_(false),
 649       is_touch_hud_projection_enabled_(false) {
 650   DCHECK(delegate_.get());
 651   gpu_support_.reset(delegate_->CreateGPUSupport());
 652   display_manager_.reset(new DisplayManager);
 653   display_controller_.reset(new DisplayController);
 654 #if defined(OS_CHROMEOS) && defined(USE_X11)
 655   user_metrics_recorder_.reset(new UserMetricsRecorder);
 656 #endif  // defined(OS_CHROMEOS)
 657
 658 #if defined(OS_CHROMEOS)
 659   PowerStatus::Initialize();
 660 #endif
 661 }
 662
 663 Shell::~Shell() {
 664   TRACE_EVENT0("shutdown", "ash::Shell::Destructor");
 665
 666   delegate_->PreShutdown();
 667
 668   views::FocusManagerFactory::Install(NULL);
 669
 670   // Remove the focus from any window. This will prevent overhead and side
 671   // effects (e.g. crashes) from changing focus during shutdown.
 672   // See bug crbug.com/134502.
 673   aura::client::GetFocusClient(GetPrimaryRootWindow())->FocusWindow(NULL);
 674
 675   // Please keep in same order as in Init() because it's easy to miss one.
 676   if (window_modality_controller_)
 677     window_modality_controller_.reset();
 678 #if defined(OS_CHROMEOS) && defined(USE_X11)
 679   RemovePreTargetHandler(magnifier_key_scroll_handler_.get());
 680   magnifier_key_scroll_handler_.reset();
 681
 682   RemovePreTargetHandler(speech_feedback_handler_.get());
 683   speech_feedback_handler_.reset();
 684 #endif
 685   RemovePreTargetHandler(user_activity_detector_.get());
 686   RemovePreTargetHandler(overlay_filter_.get());
 687   RemovePreTargetHandler(input_method_filter_.get());
 688   RemovePreTargetHandler(accelerator_filter_.get());
 689   RemovePreTargetHandler(event_transformation_handler_.get());
 690   RemovePreTargetHandler(toplevel_window_event_handler_.get());
 691   RemovePostTargetHandler(toplevel_window_event_handler_.get());
 692   RemovePreTargetHandler(system_gesture_filter_.get());
 693   RemovePreTargetHandler(keyboard_metrics_filter_.get());
 694   RemovePreTargetHandler(mouse_cursor_filter_.get());
 695
 696   // TooltipController is deleted with the Shell so removing its references.
 697   RemovePreTargetHandler(tooltip_controller_.get());
 698
 699   // Destroy maximize mode controller early on since it has some observers which
 700   // need to be removed.
 701   maximize_mode_controller_->Shutdown();
 702   maximize_mode_controller_.reset();
 703
 704   // AppList needs to be released before shelf layout manager, which is
 705   // destroyed with shelf container in the loop below. However, app list
 706   // container is now on top of shelf container and released after it.
 707   // TODO(xiyuan): Move it back when app list container is no longer needed.
 708   app_list_controller_.reset();
 709
 710 #if defined(OS_CHROMEOS)
 711   // Destroy the LastWindowClosedLogoutReminder before the
 712   // LogoutConfirmationController.
 713   last_window_closed_logout_reminder_.reset();
 714
 715   // Destroy the LogoutConfirmationController before the SystemTrayDelegate.
 716   logout_confirmation_controller_.reset();
 717 #endif
 718
 719   // Destroy SystemTrayDelegate before destroying the status area(s).
 720   system_tray_delegate_->Shutdown();
 721   system_tray_delegate_.reset();
 722
 723   locale_notification_controller_.reset();
 724
 725   // Drag-and-drop must be canceled prior to close all windows.
 726   drag_drop_controller_.reset();
 727
 728   // Controllers who have WindowObserver added must be deleted
 729   // before |display_controller_| is deleted.
 730
 731 #if defined(OS_CHROMEOS)
 732   // VideoActivityNotifier must be deleted before |video_detector_| is
 733   // deleted because it's observing video activity through
 734   // VideoDetectorObserver interface.
 735   video_activity_notifier_.reset();
 736 #endif  // defined(OS_CHROMEOS)
 737   video_detector_.reset();
 738   high_contrast_controller_.reset();
 739
 740   shadow_controller_.reset();
 741   resize_shadow_controller_.reset();
 742
 743   window_cycle_controller_.reset();
 744   window_selector_controller_.reset();
 745   mru_window_tracker_.reset();
 746
 747   // |shelf_window_watcher_| has a weak pointer to |shelf_Model_|
 748   // and has window observers.
 749   shelf_window_watcher_.reset();
 750
 751   // Destroy all child windows including widgets.
 752   display_controller_->CloseChildWindows();
 753   display_controller_->CloseMirroringDisplay();
 754
 755   // Chrome implementation of shelf delegate depends on FocusClient,
 756   // so must be deleted before |focus_client_|.
 757   shelf_delegate_.reset();
 758   focus_client_.reset();
 759
 760   // Destroy SystemTrayNotifier after destroying SystemTray as TrayItems
 761   // needs to remove observers from it.
 762   system_tray_notifier_.reset();
 763
 764   // These need a valid Shell instance to clean up properly, so explicitly
 765   // delete them before invalidating the instance.
 766   // Alphabetical. TODO(oshima): sort.
 767   magnification_controller_.reset();
 768   partial_magnification_controller_.reset();
 769   tooltip_controller_.reset();
 770   event_client_.reset();
 771   nested_accelerator_controller_.reset();
 772   toplevel_window_event_handler_.reset();
 773   visibility_controller_.reset();
 774   // |shelf_item_delegate_manager_| observes |shelf_model_|. It must be
 775   // destroyed before |shelf_model_| is destroyed.
 776   shelf_item_delegate_manager_.reset();
 777   shelf_model_.reset();
 778
 779   power_button_controller_.reset();
 780   lock_state_controller_.reset();
 781
 782 #if defined(OS_CHROMEOS)
 783   resolution_notification_controller_.reset();
 784 #endif
 785   desktop_background_controller_.reset();
 786   mouse_cursor_filter_.reset();
 787
 788 #if defined(OS_CHROMEOS)
 789   touch_transformer_controller_.reset();
 790 #endif  // defined(OS_CHROMEOS)
 791
 792   // This also deletes all RootWindows. Note that we invoke Shutdown() on
 793   // DisplayController before resetting |display_controller_|, since destruction
 794   // of its owned RootWindowControllers relies on the value.
 795   display_manager_->CreateScreenForShutdown();
 796   display_controller_->Shutdown();
 797   display_controller_.reset();
 798 #if defined(OS_CHROMEOS)
 799   virtual_keyboard_controller_.reset();
 800 #endif
 801   screen_position_controller_.reset();
 802   accessibility_delegate_.reset();
 803   new_window_delegate_.reset();
 804   media_delegate_.reset();
 805
 806   keyboard::KeyboardController::ResetInstance(NULL);
 807
 808 #if defined(OS_CHROMEOS)
 809   if (display_change_observer_)
 810     display_configurator_->RemoveObserver(display_change_observer_.get());
 811   if (display_configurator_animation_)
 812     display_configurator_->RemoveObserver(
 813         display_configurator_animation_.get());
 814   if (display_error_observer_)
 815     display_configurator_->RemoveObserver(display_error_observer_.get());
 816   if (projecting_observer_)
 817     display_configurator_->RemoveObserver(projecting_observer_.get());
 818   display_change_observer_.reset();
 819
 820   PowerStatus::Shutdown();
 821
 822   // Ensure that DBusThreadManager outlives this Shell.
 823   DCHECK(chromeos::DBusThreadManager::IsInitialized());
 824 #endif
 825
 826   DCHECK(instance_ == this);
 827   instance_ = NULL;
 828 }
 829
 830 void Shell::Init(const ShellInitParams& init_params) {
 831   delegate_->PreInit();
 832   bool display_initialized = display_manager_->InitFromCommandLine();
 833 #if defined(OS_CHROMEOS)
 834   display_configurator_->Init(!gpu_support_->IsPanelFittingDisabled());
 835   display_configurator_animation_.reset(new DisplayConfiguratorAnimation());
 836   display_configurator_->AddObserver(display_configurator_animation_.get());
 837
 838   // The DBusThreadManager must outlive this Shell. See the DCHECK in ~Shell.
 839   chromeos::DBusThreadManager* dbus_thread_manager =
 840       chromeos::DBusThreadManager::Get();
 841   projecting_observer_.reset(
 842       new ProjectingObserver(dbus_thread_manager->GetPowerManagerClient()));
 843   display_configurator_->AddObserver(projecting_observer_.get());
 844
 845   if (!display_initialized && base::SysInfo::IsRunningOnChromeOS()) {
 846     display_change_observer_.reset(new DisplayChangeObserver);
 847     // Register |display_change_observer_| first so that the rest of
 848     // observer gets invoked after the root windows are configured.
 849     display_configurator_->AddObserver(display_change_observer_.get());
 850     display_error_observer_.reset(new DisplayErrorObserver());
 851     display_configurator_->AddObserver(display_error_observer_.get());
 852     display_configurator_->set_state_controller(display_change_observer_.get());
 853     display_configurator_->set_mirroring_controller(display_manager_.get());
 854     display_configurator_->ForceInitialConfigure(
 855         delegate_->IsFirstRunAfterBoot() ? kChromeOsBootColor : 0);
 856     display_initialized = true;
 857   }
 858 #endif  // defined(OS_CHROMEOS)
 859   if (!display_initialized)
 860     display_manager_->InitDefaultDisplay();
 861
 862   display_manager_->InitFontParams();
 863
 864   // Install the custom factory first so that views::FocusManagers for Tray,
 865   // Shelf, and WallPaper could be created by the factory.
 866   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
 867
 868   aura::Env::CreateInstance(true);
 869   aura::Env::GetInstance()->set_context_factory(init_params.context_factory);
 870
 871   // The WindowModalityController needs to be at the front of the input event
 872   // pretarget handler list to ensure that it processes input events when modal
 873   // windows are active.
 874   window_modality_controller_.reset(
 875       new ::wm::WindowModalityController(this));
 876
 877   env_filter_.reset(new ::wm::CompoundEventFilter);
 878   AddPreTargetHandler(env_filter_.get());
 879
 880   ::wm::FocusController* focus_controller =
 881       new ::wm::FocusController(new wm::AshFocusRules);
 882   focus_client_.reset(focus_controller);
 883   activation_client_ = focus_controller;
 884   activation_client_->AddObserver(this);
 885   focus_cycler_.reset(new FocusCycler());
 886
 887   screen_position_controller_.reset(new ScreenPositionController);
 888
 889   display_controller_->Start();
 890   display_controller_->CreatePrimaryHost(
 891       ShellInitParamsToAshWindowTreeHostInitParams(init_params));
 892   aura::Window* root_window = display_controller_->GetPrimaryRootWindow();
 893   target_root_window_ = root_window;
 894
 895 #if defined(OS_CHROMEOS)
 896   resolution_notification_controller_.reset(
 897       new ResolutionNotificationController);
 898 #endif
 899
 900   cursor_manager_.SetDisplay(GetScreen()->GetPrimaryDisplay());
 901
 902   nested_accelerator_controller_.reset(
 903       new ::wm::NestedAcceleratorController(new NestedAcceleratorDelegate));
 904   accelerator_controller_.reset(new AcceleratorController);
 905   maximize_mode_controller_.reset(new MaximizeModeController());
 906
 907 #if defined(OS_CHROMEOS) && defined(USE_X11)
 908   magnifier_key_scroll_handler_ = MagnifierKeyScroller::CreateHandler().Pass();
 909   AddPreTargetHandler(magnifier_key_scroll_handler_.get());
 910   speech_feedback_handler_ = SpokenFeedbackToggler::CreateHandler().Pass();
 911   AddPreTargetHandler(speech_feedback_handler_.get());
 912 #endif
 913
 914   // The order in which event filters are added is significant.
 915
 916   // wm::UserActivityDetector passes events to observers, so let them get
 917   // rewritten first.
 918   user_activity_detector_.reset(new ::wm::UserActivityDetector);
 919   AddPreTargetHandler(user_activity_detector_.get());
 920
 921   overlay_filter_.reset(new OverlayEventFilter);
 922   AddPreTargetHandler(overlay_filter_.get());
 923   AddShellObserver(overlay_filter_.get());
 924
 925   input_method_filter_.reset(new ::wm::InputMethodEventFilter(
 926       root_window->GetHost()->GetAcceleratedWidget()));
 927   AddPreTargetHandler(input_method_filter_.get());
 928
 929   accelerator_filter_.reset(new ::wm::AcceleratorFilter(
 930       scoped_ptr< ::wm::AcceleratorDelegate>(new AcceleratorDelegate).Pass()));
 931   AddPreTargetHandler(accelerator_filter_.get());
 932
 933   event_transformation_handler_.reset(new EventTransformationHandler);
 934   AddPreTargetHandler(event_transformation_handler_.get());
 935
 936   toplevel_window_event_handler_.reset(new ToplevelWindowEventHandler);
 937
 938   system_gesture_filter_.reset(new SystemGestureEventFilter);
 939   AddPreTargetHandler(system_gesture_filter_.get());
 940
 941   keyboard_metrics_filter_.reset(new KeyboardUMAEventFilter);
 942   AddPreTargetHandler(keyboard_metrics_filter_.get());
 943
 944   // The keyboard system must be initialized before the RootWindowController is
 945   // created.
 946 #if defined(OS_CHROMEOS)
 947     keyboard::InitializeKeyboard();
 948 #endif
 949
 950 #if defined(OS_CHROMEOS)
 951   sticky_keys_controller_.reset(new StickyKeysController);
 952 #endif
 953
 954   lock_state_controller_.reset(new LockStateController);
 955   power_button_controller_.reset(new PowerButtonController(
 956       lock_state_controller_.get()));
 957 #if defined(OS_CHROMEOS)
 958   // Pass the initial display state to PowerButtonController.
 959   power_button_controller_->OnDisplayModeChanged(
 960       display_configurator_->cached_displays());
 961 #endif
 962   AddShellObserver(lock_state_controller_.get());
 963
 964   drag_drop_controller_.reset(new DragDropController);
 965   mouse_cursor_filter_.reset(new MouseCursorEventFilter());
 966   PrependPreTargetHandler(mouse_cursor_filter_.get());
 967
 968   // Create Controllers that may need root window.
 969   // TODO(oshima): Move as many controllers before creating
 970   // RootWindowController as possible.
 971   visibility_controller_.reset(new AshVisibilityController);
 972
 973   magnification_controller_.reset(
 974       MagnificationController::CreateInstance());
 975   mru_window_tracker_.reset(new MruWindowTracker(activation_client_));
 976
 977   partial_magnification_controller_.reset(
 978       new PartialMagnificationController());
 979
 980   autoclick_controller_.reset(AutoclickController::CreateInstance());
 981
 982   high_contrast_controller_.reset(new HighContrastController);
 983   video_detector_.reset(new VideoDetector);
 984   window_selector_controller_.reset(new WindowSelectorController());
 985   window_cycle_controller_.reset(new WindowCycleController());
 986
 987   tooltip_controller_.reset(
 988       new views::corewm::TooltipController(
 989           scoped_ptr<views::corewm::Tooltip>(
 990               new views::corewm::TooltipAura(gfx::SCREEN_TYPE_ALTERNATE))));
 991   AddPreTargetHandler(tooltip_controller_.get());
 992
 993   event_client_.reset(new EventClientImpl);
 994
 995   // This controller needs to be set before SetupManagedWindowMode.
 996   desktop_background_controller_.reset(new DesktopBackgroundController());
 997   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
 998
 999   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
1000   accessibility_delegate_.reset(delegate_->CreateAccessibilityDelegate());
1001   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
1002   media_delegate_.reset(delegate_->CreateMediaDelegate());
1003
1004   resize_shadow_controller_.reset(new ResizeShadowController());
1005   shadow_controller_.reset(
1006       new ::wm::ShadowController(activation_client_));
1007
1008   // Create system_tray_notifier_ before the delegate.
1009   system_tray_notifier_.reset(new ash::SystemTrayNotifier());
1010
1011   // Initialize system_tray_delegate_ before initializing StatusAreaWidget.
1012   system_tray_delegate_.reset(delegate()->CreateSystemTrayDelegate());
1013   DCHECK(system_tray_delegate_.get());
1014
1015   locale_notification_controller_.reset(new LocaleNotificationController);
1016
1017   // Initialize system_tray_delegate_ after StatusAreaWidget is created.
1018   system_tray_delegate_->Initialize();
1019
1020 #if defined(OS_CHROMEOS)
1021   // Create the LogoutConfirmationController after the SystemTrayDelegate.
1022   logout_confirmation_controller_.reset(new LogoutConfirmationController(
1023       base::Bind(&SystemTrayDelegate::SignOut,
1024                  base::Unretained(system_tray_delegate_.get()))));
1025
1026   // Create TouchTransformerController before DisplayController::InitDisplays()
1027   // since TouchTransformerController listens on
1028   // DisplayController::Observer::OnDisplaysInitialized().
1029   touch_transformer_controller_.reset(new TouchTransformerController());
1030 #endif  // defined(OS_CHROMEOS)
1031
1032   display_controller_->InitDisplays();
1033
1034 #if defined(OS_CHROMEOS)
1035   // Needs to be created after InitDisplays() since it may cause the virtual
1036   // keyboard to be deployed.
1037   virtual_keyboard_controller_.reset(new VirtualKeyboardController);
1038 #endif  // defined(OS_CHROMEOS)
1039
1040   // It needs to be created after RootWindowController has been created
1041   // (which calls OnWindowResized has been called, otherwise the
1042   // widget will not paint when restoring after a browser crash.  Also it needs
1043   // to be created after InitSecondaryDisplays() to initialize the wallpapers in
1044   // the correct size.
1045   user_wallpaper_delegate_->InitializeWallpaper();
1046
1047   if (initially_hide_cursor_)
1048     cursor_manager_.HideCursor();
1049   cursor_manager_.SetCursor(ui::kCursorPointer);
1050
1051 #if defined(OS_CHROMEOS)
1052   // Set accelerator controller delegates.
1053   accelerator_controller_->SetBrightnessControlDelegate(
1054       scoped_ptr<ash::BrightnessControlDelegate>(
1055           new ash::system::BrightnessControllerChromeos).Pass());
1056
1057   power_event_observer_.reset(new PowerEventObserver());
1058   user_activity_notifier_.reset(
1059       new ui::UserActivityPowerManagerNotifier(user_activity_detector_.get()));
1060   video_activity_notifier_.reset(
1061       new VideoActivityNotifier(video_detector_.get()));
1062   bluetooth_notification_controller_.reset(new BluetoothNotificationController);
1063   last_window_closed_logout_reminder_.reset(new LastWindowClosedLogoutReminder);
1064   screen_orientation_delegate_.reset(new ScreenOrientationDelegate());
1065 #endif
1066   // The compositor thread and main message loop have to be running in
1067   // order to create mirror window. Run it after the main message loop
1068   // is started.
1069   display_manager_->CreateMirrorWindowAsyncIfAny();
1070 }
1071
1072 void Shell::InitKeyboard() {
1073   if (keyboard::IsKeyboardEnabled()) {
1074     if (keyboard::KeyboardController::GetInstance()) {
1075       RootWindowControllerList controllers = GetAllRootWindowControllers();
1076       for (RootWindowControllerList::iterator iter = controllers.begin();
1077            iter != controllers.end(); ++iter) {
1078         (*iter)->DeactivateKeyboard(
1079             keyboard::KeyboardController::GetInstance());
1080       }
1081     }
1082     keyboard::KeyboardControllerProxy* proxy =
1083         delegate_->CreateKeyboardControllerProxy();
1084     keyboard::KeyboardController::ResetInstance(
1085         new keyboard::KeyboardController(proxy));
1086   }
1087 }
1088
1089 void Shell::InitRootWindow(aura::Window* root_window) {
1090   DCHECK(activation_client_);
1091   DCHECK(visibility_controller_.get());
1092   DCHECK(drag_drop_controller_.get());
1093
1094   aura::client::SetFocusClient(root_window, focus_client_.get());
1095   input_method_filter_->SetInputMethodPropertyInRootWindow(root_window);
1096   aura::client::SetActivationClient(root_window, activation_client_);
1097   ::wm::FocusController* focus_controller =
1098       static_cast< ::wm::FocusController*>(activation_client_);
1099   root_window->AddPreTargetHandler(focus_controller);
1100   aura::client::SetVisibilityClient(root_window, visibility_controller_.get());
1101   aura::client::SetDragDropClient(root_window, drag_drop_controller_.get());
1102   aura::client::SetScreenPositionClient(root_window,
1103                                         screen_position_controller_.get());
1104   aura::client::SetCursorClient(root_window, &cursor_manager_);
1105   aura::client::SetTooltipClient(root_window, tooltip_controller_.get());
1106   aura::client::SetEventClient(root_window, event_client_.get());
1107
1108   aura::client::SetWindowMoveClient(root_window,
1109       toplevel_window_event_handler_.get());
1110   root_window->AddPreTargetHandler(toplevel_window_event_handler_.get());
1111   root_window->AddPostTargetHandler(toplevel_window_event_handler_.get());
1112
1113   if (nested_accelerator_controller_) {
1114     aura::client::SetDispatcherClient(root_window,
1115                                       nested_accelerator_controller_.get());
1116   }
1117 }
1118
1119 bool Shell::CanWindowReceiveEvents(aura::Window* window) {
1120   RootWindowControllerList controllers = GetAllRootWindowControllers();
1121   for (RootWindowControllerList::iterator iter = controllers.begin();
1122        iter != controllers.end(); ++iter) {
1123     SystemModalContainerLayoutManager* layout_manager =
1124         (*iter)->GetSystemModalLayoutManager(window);
1125     if (layout_manager && layout_manager->CanWindowReceiveEvents(window))
1126       return true;
1127     // Allow events to fall through to the virtual keyboard even if displaying
1128     // a system modal dialog.
1129     if ((*iter)->IsVirtualKeyboardWindow(window))
1130       return true;
1131   }
1132
1133   return false;
1134 }
1135
1136 ////////////////////////////////////////////////////////////////////////////////
1137 // Shell, ui::EventTarget overrides:
1138
1139 bool Shell::CanAcceptEvent(const ui::Event& event) {
1140   return true;
1141 }
1142
1143 ui::EventTarget* Shell::GetParentTarget() {
1144   return aura::Env::GetInstance();
1145 }
1146
1147 scoped_ptr<ui::EventTargetIterator> Shell::GetChildIterator() const {
1148   return scoped_ptr<ui::EventTargetIterator>();
1149 }
1150
1151 ui::EventTargeter* Shell::GetEventTargeter() {
1152   NOTREACHED();
1153   return NULL;
1154 }
1155
1156 void Shell::OnEvent(ui::Event* event) {
1157 }
1158
1159 ////////////////////////////////////////////////////////////////////////////////
1160 // Shell, aura::client::ActivationChangeObserver implementation:
1161
1162 void Shell::OnWindowActivated(aura::Window* gained_active,
1163                               aura::Window* lost_active) {
1164   if (gained_active)
1165     target_root_window_ = gained_active->GetRootWindow();
1166 }
1167
1168 }  // namespace ash