src/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/display/virtual_keyboard_window_controller.h"
  27 #include "ash/drag_drop/drag_drop_controller.h"
  28 #include "ash/first_run/first_run_helper_impl.h"
  29 #include "ash/focus_cycler.h"
  30 #include "ash/frame/custom_frame_view_ash.h"
  31 #include "ash/gpu_support.h"
  32 #include "ash/high_contrast/high_contrast_controller.h"
  33 #include "ash/host/ash_window_tree_host_init_params.h"
  34 #include "ash/keyboard_uma_event_filter.h"
  35 #include "ash/magnifier/magnification_controller.h"
  36 #include "ash/magnifier/partial_magnification_controller.h"
  37 #include "ash/media_delegate.h"
  38 #include "ash/new_window_delegate.h"
  39 #include "ash/root_window_controller.h"
  40 #include "ash/session/session_state_delegate.h"
  41 #include "ash/shelf/app_list_shelf_item_delegate.h"
  42 #include "ash/shelf/shelf_delegate.h"
  43 #include "ash/shelf/shelf_item_delegate.h"
  44 #include "ash/shelf/shelf_item_delegate_manager.h"
  45 #include "ash/shelf/shelf_layout_manager.h"
  46 #include "ash/shelf/shelf_model.h"
  47 #include "ash/shelf/shelf_widget.h"
  48 #include "ash/shelf/shelf_window_watcher.h"
  49 #include "ash/shell_delegate.h"
  50 #include "ash/shell_factory.h"
  51 #include "ash/shell_init_params.h"
  52 #include "ash/shell_window_ids.h"
  53 #include "ash/system/locale/locale_notification_controller.h"
  54 #include "ash/system/status_area_widget.h"
  55 #include "ash/system/tray/system_tray_delegate.h"
  56 #include "ash/system/tray/system_tray_notifier.h"
  57 #include "ash/wm/app_list_controller.h"
  58 #include "ash/wm/ash_focus_rules.h"
  59 #include "ash/wm/ash_native_cursor_manager.h"
  60 #include "ash/wm/coordinate_conversion.h"
  61 #include "ash/wm/event_client_impl.h"
  62 #include "ash/wm/lock_state_controller.h"
  63 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
  64 #include "ash/wm/maximize_mode/maximize_mode_window_manager.h"
  65 #include "ash/wm/mru_window_tracker.h"
  66 #include "ash/wm/overlay_event_filter.h"
  67 #include "ash/wm/overview/window_selector_controller.h"
  68 #include "ash/wm/power_button_controller.h"
  69 #include "ash/wm/resize_shadow_controller.h"
  70 #include "ash/wm/root_window_layout_manager.h"
  71 #include "ash/wm/screen_dimmer.h"
  72 #include "ash/wm/system_gesture_event_filter.h"
  73 #include "ash/wm/system_modal_container_event_filter.h"
  74 #include "ash/wm/system_modal_container_layout_manager.h"
  75 #include "ash/wm/toplevel_window_event_handler.h"
  76 #include "ash/wm/video_detector.h"
  77 #include "ash/wm/window_animations.h"
  78 #include "ash/wm/window_cycle_controller.h"
  79 #include "ash/wm/window_positioner.h"
  80 #include "ash/wm/window_properties.h"
  81 #include "ash/wm/window_util.h"
  82 #include "ash/wm/workspace_controller.h"
  83 #include "base/bind.h"
  84 #include "base/debug/trace_event.h"
  85 #include "ui/aura/client/aura_constants.h"
  86 #include "ui/aura/env.h"
  87 #include "ui/aura/layout_manager.h"
  88 #include "ui/aura/window.h"
  89 #include "ui/aura/window_event_dispatcher.h"
  90 #include "ui/base/ui_base_switches.h"
  91 #include "ui/compositor/layer.h"
  92 #include "ui/compositor/layer_animator.h"
  93 #include "ui/events/event_target_iterator.h"
  94 #include "ui/gfx/display.h"
  95 #include "ui/gfx/image/image_skia.h"
  96 #include "ui/gfx/screen.h"
  97 #include "ui/gfx/size.h"
  98 #include "ui/keyboard/keyboard.h"
  99 #include "ui/keyboard/keyboard_controller.h"
 100 #include "ui/keyboard/keyboard_switches.h"
 101 #include "ui/keyboard/keyboard_util.h"
 102 #include "ui/message_center/message_center.h"
 103 #include "ui/views/corewm/tooltip_aura.h"
 104 #include "ui/views/corewm/tooltip_controller.h"
 105 #include "ui/views/focus/focus_manager_factory.h"
 106 #include "ui/views/widget/native_widget_aura.h"
 107 #include "ui/views/widget/widget.h"
 108 #include "ui/wm/core/accelerator_filter.h"
 109 #include "ui/wm/core/compound_event_filter.h"
 110 #include "ui/wm/core/focus_controller.h"
 111 #include "ui/wm/core/input_method_event_filter.h"
 112 #include "ui/wm/core/nested_accelerator_controller.h"
 113 #include "ui/wm/core/shadow_controller.h"
 114 #include "ui/wm/core/user_activity_detector.h"
 115 #include "ui/wm/core/visibility_controller.h"
 116 #include "ui/wm/core/window_modality_controller.h"
 117
 118 #if defined(OS_CHROMEOS)
 119 #if defined(USE_X11)
 120 #include "ash/accelerators/magnifier_key_scroller.h"
 121 #include "ash/accelerators/spoken_feedback_toggler.h"
 122 #include "ash/touch/touch_transformer_controller.h"
 123 #include "ui/gfx/x/x11_types.h"
 124 #endif  // defined(USE_X11)
 125 #include "ash/ash_constants.h"
 126 #include "ash/display/display_change_observer_chromeos.h"
 127 #include "ash/display/display_configurator_animation.h"
 128 #include "ash/display/display_error_observer_chromeos.h"
 129 #include "ash/display/projecting_observer_chromeos.h"
 130 #include "ash/display/resolution_notification_controller.h"
 131 #include "ash/sticky_keys/sticky_keys_controller.h"
 132 #include "ash/system/chromeos/bluetooth/bluetooth_notification_controller.h"
 133 #include "ash/system/chromeos/brightness/brightness_controller_chromeos.h"
 134 #include "ash/system/chromeos/power/power_event_observer.h"
 135 #include "ash/system/chromeos/power/power_status.h"
 136 #include "ash/system/chromeos/power/video_activity_notifier.h"
 137 #include "ash/system/chromeos/session/last_window_closed_logout_reminder.h"
 138 #include "ash/system/chromeos/session/logout_confirmation_controller.h"
 139 #include "base/bind_helpers.h"
 140 #include "base/sys_info.h"
 141 #include "ui/chromeos/user_activity_power_manager_notifier.h"
 142 #include "ui/display/chromeos/display_configurator.h"
 143 #endif  // defined(OS_CHROMEOS)
 144
 145 namespace ash {
 146
 147 namespace {
 148
 149 using aura::Window;
 150 using views::Widget;
 151
 152 // A Corewm VisibilityController subclass that calls the Ash animation routine
 153 // so we can pick up our extended animations. See ash/wm/window_animations.h.
 154 class AshVisibilityController : public ::wm::VisibilityController {
 155  public:
 156   AshVisibilityController() {}
 157   virtual ~AshVisibilityController() {}
 158
 159  private:
 160   // Overridden from ::wm::VisibilityController:
 161   virtual bool CallAnimateOnChildWindowVisibilityChanged(
 162       aura::Window* window,
 163       bool visible) OVERRIDE {
 164     return AnimateOnChildWindowVisibilityChanged(window, visible);
 165   }
 166
 167   DISALLOW_COPY_AND_ASSIGN(AshVisibilityController);
 168 };
 169
 170 AshWindowTreeHostInitParams ShellInitParamsToAshWindowTreeHostInitParams(
 171     const ShellInitParams& shell_init_params) {
 172   AshWindowTreeHostInitParams ash_init_params;
 173 #if defined(OS_WIN)
 174   ash_init_params.remote_hwnd = shell_init_params.remote_hwnd;
 175 #endif
 176   return ash_init_params;
 177 }
 178
 179 }  // namespace
 180
 181 // static
 182 Shell* Shell::instance_ = NULL;
 183 // static
 184 bool Shell::initially_hide_cursor_ = false;
 185
 186 ////////////////////////////////////////////////////////////////////////////////
 187 // Shell, public:
 188
 189 // static
 190 Shell* Shell::CreateInstance(const ShellInitParams& init_params) {
 191   CHECK(!instance_);
 192   instance_ = new Shell(init_params.delegate);
 193   instance_->Init(init_params);
 194   return instance_;
 195 }
 196
 197 // static
 198 Shell* Shell::GetInstance() {
 199   DCHECK(instance_);
 200   return instance_;
 201 }
 202
 203 // static
 204 bool Shell::HasInstance() {
 205   return !!instance_;
 206 }
 207
 208 // static
 209 void Shell::DeleteInstance() {
 210   delete instance_;
 211   instance_ = NULL;
 212 }
 213
 214 // static
 215 RootWindowController* Shell::GetPrimaryRootWindowController() {
 216   return GetRootWindowController(GetPrimaryRootWindow());
 217 }
 218
 219 // static
 220 Shell::RootWindowControllerList Shell::GetAllRootWindowControllers() {
 221   return Shell::GetInstance()->display_controller()->
 222       GetAllRootWindowControllers();
 223 }
 224
 225 // static
 226 aura::Window* Shell::GetPrimaryRootWindow() {
 227   return GetInstance()->display_controller()->GetPrimaryRootWindow();
 228 }
 229
 230 // static
 231 aura::Window* Shell::GetTargetRootWindow() {
 232   Shell* shell = GetInstance();
 233   if (shell->scoped_target_root_window_)
 234     return shell->scoped_target_root_window_;
 235   return shell->target_root_window_;
 236 }
 237
 238 // static
 239 gfx::Screen* Shell::GetScreen() {
 240   return gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_ALTERNATE);
 241 }
 242
 243 // static
 244 aura::Window::Windows Shell::GetAllRootWindows() {
 245   return Shell::GetInstance()->display_controller()->
 246       GetAllRootWindows();
 247 }
 248
 249 // static
 250 aura::Window* Shell::GetContainer(aura::Window* root_window,
 251                                   int container_id) {
 252   return root_window->GetChildById(container_id);
 253 }
 254
 255 // static
 256 const aura::Window* Shell::GetContainer(const aura::Window* root_window,
 257                                         int container_id) {
 258   return root_window->GetChildById(container_id);
 259 }
 260
 261 // static
 262 std::vector<aura::Window*> Shell::GetContainersFromAllRootWindows(
 263     int container_id,
 264     aura::Window* priority_root) {
 265   std::vector<aura::Window*> containers;
 266   aura::Window::Windows root_windows = GetAllRootWindows();
 267   for (aura::Window::Windows::const_iterator it = root_windows.begin();
 268        it != root_windows.end(); ++it) {
 269     aura::Window* container = (*it)->GetChildById(container_id);
 270     if (container) {
 271       if (priority_root && priority_root->Contains(container))
 272         containers.insert(containers.begin(), container);
 273       else
 274         containers.push_back(container);
 275     }
 276   }
 277   return containers;
 278 }
 279
 280 void Shell::ShowContextMenu(const gfx::Point& location_in_screen,
 281                             ui::MenuSourceType source_type) {
 282   // No context menus if there is no session with an active user.
 283   if (!session_state_delegate_->NumberOfLoggedInUsers())
 284     return;
 285   // No context menus when screen is locked.
 286   if (session_state_delegate_->IsScreenLocked())
 287     return;
 288
 289   aura::Window* root =
 290       wm::GetRootWindowMatching(gfx::Rect(location_in_screen, gfx::Size()));
 291   GetRootWindowController(root)
 292       ->ShowContextMenu(location_in_screen, source_type);
 293 }
 294
 295 void Shell::ShowAppList(aura::Window* window) {
 296   // If the context window is not given, show it on the target root window.
 297   if (!window)
 298     window = GetTargetRootWindow();
 299   if (!app_list_controller_)
 300     app_list_controller_.reset(new AppListController);
 301   app_list_controller_->SetVisible(true, window);
 302 }
 303
 304 void Shell::DismissAppList() {
 305   if (!app_list_controller_)
 306     return;
 307   app_list_controller_->SetVisible(false, GetTargetRootWindow());
 308 }
 309
 310 void Shell::ToggleAppList(aura::Window* window) {
 311   if (app_list_controller_ && app_list_controller_->IsVisible()) {
 312     DismissAppList();
 313     return;
 314   }
 315
 316   ShowAppList(window);
 317 }
 318
 319 bool Shell::GetAppListTargetVisibility() const {
 320   return app_list_controller_.get() &&
 321       app_list_controller_->GetTargetVisibility();
 322 }
 323
 324 aura::Window* Shell::GetAppListWindow() {
 325   return app_list_controller_.get() ? app_list_controller_->GetWindow() : NULL;
 326 }
 327
 328 app_list::AppListView* Shell::GetAppListView() {
 329   return app_list_controller_.get() ? app_list_controller_->GetView() : NULL;
 330 }
 331
 332 bool Shell::IsSystemModalWindowOpen() const {
 333   if (simulate_modal_window_open_for_testing_)
 334     return true;
 335   const std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 336       kShellWindowId_SystemModalContainer, NULL);
 337   for (std::vector<aura::Window*>::const_iterator cit = containers.begin();
 338        cit != containers.end(); ++cit) {
 339     for (aura::Window::Windows::const_iterator wit = (*cit)->children().begin();
 340          wit != (*cit)->children().end(); ++wit) {
 341       if ((*wit)->GetProperty(aura::client::kModalKey) ==
 342           ui::MODAL_TYPE_SYSTEM && (*wit)->TargetVisibility()) {
 343         return true;
 344       }
 345     }
 346   }
 347   return false;
 348 }
 349
 350 views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
 351     views::Widget* widget) {
 352   // Use translucent-style window frames for dialogs.
 353   return new CustomFrameViewAsh(widget);
 354 }
 355
 356 void Shell::RotateFocus(Direction direction) {
 357   focus_cycler_->RotateFocus(direction == FORWARD ? FocusCycler::FORWARD
 358                                                   : FocusCycler::BACKWARD);
 359 }
 360
 361 void Shell::SetDisplayWorkAreaInsets(Window* contains,
 362                                      const gfx::Insets& insets) {
 363   if (!display_controller_->UpdateWorkAreaOfDisplayNearestWindow(
 364           contains, insets)) {
 365     return;
 366   }
 367   FOR_EACH_OBSERVER(ShellObserver, observers_,
 368                     OnDisplayWorkAreaInsetsChanged());
 369 }
 370
 371 void Shell::OnLoginStateChanged(user::LoginStatus status) {
 372   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLoginStateChanged(status));
 373 }
 374
 375 void Shell::OnLoginUserProfilePrepared() {
 376   CreateShelf();
 377   CreateKeyboard();
 378 }
 379
 380 void Shell::UpdateAfterLoginStatusChange(user::LoginStatus status) {
 381   RootWindowControllerList controllers = GetAllRootWindowControllers();
 382   for (RootWindowControllerList::iterator iter = controllers.begin();
 383        iter != controllers.end(); ++iter)
 384     (*iter)->UpdateAfterLoginStatusChange(status);
 385 }
 386
 387 void Shell::OnAppTerminating() {
 388   FOR_EACH_OBSERVER(ShellObserver, observers_, OnAppTerminating());
 389 }
 390
 391 void Shell::OnLockStateChanged(bool locked) {
 392   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLockStateChanged(locked));
 393 #ifndef NDEBUG
 394   // Make sure that there is no system modal in Lock layer when unlocked.
 395   if (!locked) {
 396     std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 397         kShellWindowId_LockSystemModalContainer, GetPrimaryRootWindow());
 398     for (std::vector<aura::Window*>::const_iterator iter = containers.begin();
 399          iter != containers.end(); ++iter) {
 400       DCHECK_EQ(0u, (*iter)->children().size());
 401     }
 402   }
 403 #endif
 404 }
 405
 406 void Shell::OnCastingSessionStartedOrStopped(bool started) {
 407 #if defined(OS_CHROMEOS) && defined(USE_X11)
 408   if (projecting_observer_)
 409     projecting_observer_->OnCastingSessionStartedOrStopped(started);
 410 #endif
 411 }
 412
 413 void Shell::OnOverviewModeStarting() {
 414   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeStarting());
 415 }
 416
 417 void Shell::OnOverviewModeEnding() {
 418   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeEnding());
 419 }
 420
 421 void Shell::OnMaximizeModeStarted() {
 422   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeStarted());
 423 }
 424
 425 void Shell::OnMaximizeModeEnded() {
 426   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeEnded());
 427 }
 428
 429 void Shell::OnRootWindowAdded(aura::Window* root_window) {
 430   FOR_EACH_OBSERVER(ShellObserver, observers_, OnRootWindowAdded(root_window));
 431 }
 432
 433 void Shell::CreateShelf() {
 434   RootWindowControllerList controllers = GetAllRootWindowControllers();
 435   for (RootWindowControllerList::iterator iter = controllers.begin();
 436        iter != controllers.end(); ++iter)
 437     (*iter)->shelf()->CreateShelf();
 438 }
 439
 440 void Shell::OnShelfCreatedForRootWindow(aura::Window* root_window) {
 441   FOR_EACH_OBSERVER(ShellObserver,
 442                     observers_,
 443                     OnShelfCreatedForRootWindow(root_window));
 444 }
 445
 446 void Shell::CreateKeyboard() {
 447   // TODO(bshe): Primary root window controller may not be the controller to
 448   // attach virtual keyboard. See http://crbug.com/303429
 449   InitKeyboard();
 450   if (keyboard::IsKeyboardUsabilityExperimentEnabled()) {
 451     display_controller()->virtual_keyboard_window_controller()->
 452         ActivateKeyboard(keyboard::KeyboardController::GetInstance());
 453   } else {
 454     GetPrimaryRootWindowController()->
 455         ActivateKeyboard(keyboard::KeyboardController::GetInstance());
 456   }
 457 }
 458
 459 void Shell::DeactivateKeyboard() {
 460   if (keyboard::KeyboardController::GetInstance()) {
 461     RootWindowControllerList controllers = GetAllRootWindowControllers();
 462     for (RootWindowControllerList::iterator iter = controllers.begin();
 463         iter != controllers.end(); ++iter) {
 464       (*iter)->DeactivateKeyboard(keyboard::KeyboardController::GetInstance());
 465     }
 466   }
 467   keyboard::KeyboardController::ResetInstance(NULL);
 468 }
 469
 470 void Shell::ShowShelf() {
 471   RootWindowControllerList controllers = GetAllRootWindowControllers();
 472   for (RootWindowControllerList::iterator iter = controllers.begin();
 473        iter != controllers.end(); ++iter)
 474     (*iter)->ShowShelf();
 475 }
 476
 477 void Shell::AddShellObserver(ShellObserver* observer) {
 478   observers_.AddObserver(observer);
 479 }
 480
 481 void Shell::RemoveShellObserver(ShellObserver* observer) {
 482   observers_.RemoveObserver(observer);
 483 }
 484
 485 #if defined(OS_CHROMEOS)
 486 bool Shell::ShouldSaveDisplaySettings() {
 487   return !((maximize_mode_controller_->IsMaximizeModeWindowManagerEnabled() &&
 488             maximize_mode_controller_->in_set_screen_rotation()) ||
 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   if (keyboard::IsKeyboardUsabilityExperimentEnabled()) {
 827     display_manager_->SetSecondDisplayMode(DisplayManager::VIRTUAL_KEYBOARD);
 828   }
 829   bool display_initialized = display_manager_->InitFromCommandLine();
 830 #if defined(OS_CHROMEOS)
 831   display_configurator_->Init(!gpu_support_->IsPanelFittingDisabled());
 832   display_configurator_animation_.reset(new DisplayConfiguratorAnimation());
 833   display_configurator_->AddObserver(display_configurator_animation_.get());
 834
 835   projecting_observer_.reset(new ProjectingObserver());
 836   display_configurator_->AddObserver(projecting_observer_.get());
 837
 838   if (!display_initialized && base::SysInfo::IsRunningOnChromeOS()) {
 839     display_change_observer_.reset(new DisplayChangeObserver);
 840     // Register |display_change_observer_| first so that the rest of
 841     // observer gets invoked after the root windows are configured.
 842     display_configurator_->AddObserver(display_change_observer_.get());
 843     display_error_observer_.reset(new DisplayErrorObserver());
 844     display_configurator_->AddObserver(display_error_observer_.get());
 845     display_configurator_->set_state_controller(display_change_observer_.get());
 846     display_configurator_->set_mirroring_controller(display_manager_.get());
 847     display_configurator_->ForceInitialConfigure(
 848         delegate_->IsFirstRunAfterBoot() ? kChromeOsBootColor : 0);
 849     display_initialized = true;
 850   }
 851 #endif  // defined(OS_CHROMEOS)
 852   if (!display_initialized)
 853     display_manager_->InitDefaultDisplay();
 854
 855   display_manager_->InitFontParams();
 856
 857   // Install the custom factory first so that views::FocusManagers for Tray,
 858   // Shelf, and WallPaper could be created by the factory.
 859   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
 860
 861   aura::Env::CreateInstance(true);
 862   aura::Env::GetInstance()->set_context_factory(init_params.context_factory);
 863
 864   // The WindowModalityController needs to be at the front of the input event
 865   // pretarget handler list to ensure that it processes input events when modal
 866   // windows are active.
 867   window_modality_controller_.reset(
 868       new ::wm::WindowModalityController(this));
 869
 870   env_filter_.reset(new ::wm::CompoundEventFilter);
 871   AddPreTargetHandler(env_filter_.get());
 872
 873   ::wm::FocusController* focus_controller =
 874       new ::wm::FocusController(new wm::AshFocusRules);
 875   focus_client_.reset(focus_controller);
 876   activation_client_ = focus_controller;
 877   activation_client_->AddObserver(this);
 878   focus_cycler_.reset(new FocusCycler());
 879
 880   screen_position_controller_.reset(new ScreenPositionController);
 881
 882   display_controller_->Start();
 883   display_controller_->CreatePrimaryHost(
 884       ShellInitParamsToAshWindowTreeHostInitParams(init_params));
 885   aura::Window* root_window = display_controller_->GetPrimaryRootWindow();
 886   target_root_window_ = root_window;
 887
 888 #if defined(OS_CHROMEOS)
 889   resolution_notification_controller_.reset(
 890       new ResolutionNotificationController);
 891 #endif
 892
 893   cursor_manager_.SetDisplay(GetScreen()->GetPrimaryDisplay());
 894
 895   nested_accelerator_controller_.reset(
 896       new ::wm::NestedAcceleratorController(new NestedAcceleratorDelegate));
 897   accelerator_controller_.reset(new AcceleratorController);
 898   maximize_mode_controller_.reset(new MaximizeModeController());
 899
 900 #if defined(OS_CHROMEOS) && defined(USE_X11)
 901   magnifier_key_scroll_handler_ = MagnifierKeyScroller::CreateHandler().Pass();
 902   AddPreTargetHandler(magnifier_key_scroll_handler_.get());
 903   speech_feedback_handler_ = SpokenFeedbackToggler::CreateHandler().Pass();
 904   AddPreTargetHandler(speech_feedback_handler_.get());
 905 #endif
 906
 907   // The order in which event filters are added is significant.
 908
 909   // wm::UserActivityDetector passes events to observers, so let them get
 910   // rewritten first.
 911   user_activity_detector_.reset(new ::wm::UserActivityDetector);
 912   AddPreTargetHandler(user_activity_detector_.get());
 913
 914   overlay_filter_.reset(new OverlayEventFilter);
 915   AddPreTargetHandler(overlay_filter_.get());
 916   AddShellObserver(overlay_filter_.get());
 917
 918   input_method_filter_.reset(new ::wm::InputMethodEventFilter(
 919       root_window->GetHost()->GetAcceleratedWidget()));
 920   AddPreTargetHandler(input_method_filter_.get());
 921
 922   accelerator_filter_.reset(new ::wm::AcceleratorFilter(
 923       scoped_ptr< ::wm::AcceleratorDelegate>(new AcceleratorDelegate).Pass()));
 924   AddPreTargetHandler(accelerator_filter_.get());
 925
 926   event_transformation_handler_.reset(new EventTransformationHandler);
 927   AddPreTargetHandler(event_transformation_handler_.get());
 928
 929   toplevel_window_event_handler_.reset(new ToplevelWindowEventHandler);
 930
 931   system_gesture_filter_.reset(new SystemGestureEventFilter);
 932   AddPreTargetHandler(system_gesture_filter_.get());
 933
 934   keyboard_metrics_filter_.reset(new KeyboardUMAEventFilter);
 935   AddPreTargetHandler(keyboard_metrics_filter_.get());
 936
 937   // The keyboard system must be initialized before the RootWindowController is
 938   // created.
 939 #if defined(OS_CHROMEOS)
 940     keyboard::InitializeKeyboard();
 941 #endif
 942
 943 #if defined(OS_CHROMEOS)
 944   sticky_keys_controller_.reset(new StickyKeysController);
 945 #endif
 946
 947   lock_state_controller_.reset(new LockStateController);
 948   power_button_controller_.reset(new PowerButtonController(
 949       lock_state_controller_.get()));
 950 #if defined(OS_CHROMEOS)
 951   // Pass the initial display state to PowerButtonController.
 952   power_button_controller_->OnDisplayModeChanged(
 953       display_configurator_->cached_displays());
 954 #endif
 955   AddShellObserver(lock_state_controller_.get());
 956
 957   drag_drop_controller_.reset(new DragDropController);
 958   mouse_cursor_filter_.reset(new MouseCursorEventFilter());
 959   PrependPreTargetHandler(mouse_cursor_filter_.get());
 960
 961   // Create Controllers that may need root window.
 962   // TODO(oshima): Move as many controllers before creating
 963   // RootWindowController as possible.
 964   visibility_controller_.reset(new AshVisibilityController);
 965
 966   magnification_controller_.reset(
 967       MagnificationController::CreateInstance());
 968   mru_window_tracker_.reset(new MruWindowTracker(activation_client_));
 969
 970   partial_magnification_controller_.reset(
 971       new PartialMagnificationController());
 972
 973   autoclick_controller_.reset(AutoclickController::CreateInstance());
 974
 975   high_contrast_controller_.reset(new HighContrastController);
 976   video_detector_.reset(new VideoDetector);
 977   window_selector_controller_.reset(new WindowSelectorController());
 978   window_cycle_controller_.reset(new WindowCycleController());
 979
 980   tooltip_controller_.reset(
 981       new views::corewm::TooltipController(
 982           scoped_ptr<views::corewm::Tooltip>(
 983               new views::corewm::TooltipAura(gfx::SCREEN_TYPE_ALTERNATE))));
 984   AddPreTargetHandler(tooltip_controller_.get());
 985
 986   event_client_.reset(new EventClientImpl);
 987
 988   // This controller needs to be set before SetupManagedWindowMode.
 989   desktop_background_controller_.reset(new DesktopBackgroundController());
 990   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
 991
 992   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
 993   accessibility_delegate_.reset(delegate_->CreateAccessibilityDelegate());
 994   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
 995   media_delegate_.reset(delegate_->CreateMediaDelegate());
 996
 997   resize_shadow_controller_.reset(new ResizeShadowController());
 998   shadow_controller_.reset(
 999       new ::wm::ShadowController(activation_client_));
1000
1001   // Create system_tray_notifier_ before the delegate.
1002   system_tray_notifier_.reset(new ash::SystemTrayNotifier());
1003
1004   // Initialize system_tray_delegate_ before initializing StatusAreaWidget.
1005   system_tray_delegate_.reset(delegate()->CreateSystemTrayDelegate());
1006   DCHECK(system_tray_delegate_.get());
1007
1008   locale_notification_controller_.reset(new LocaleNotificationController);
1009
1010   // Initialize system_tray_delegate_ after StatusAreaWidget is created.
1011   system_tray_delegate_->Initialize();
1012
1013 #if defined(OS_CHROMEOS)
1014   // Create the LogoutConfirmationController after the SystemTrayDelegate.
1015   logout_confirmation_controller_.reset(new LogoutConfirmationController(
1016       base::Bind(&SystemTrayDelegate::SignOut,
1017                  base::Unretained(system_tray_delegate_.get()))));
1018 #endif
1019
1020 #if defined(OS_CHROMEOS) && defined(USE_X11)
1021   // Create TouchTransformerController before DisplayController::InitDisplays()
1022   // since TouchTransformerController listens on
1023   // DisplayController::Observer::OnDisplaysInitialized().
1024   touch_transformer_controller_.reset(new TouchTransformerController());
1025 #endif  // defined(OS_CHROMEOS) && defined(USE_X11)
1026
1027   display_controller_->InitDisplays();
1028
1029   // It needs to be created after RootWindowController has been created
1030   // (which calls OnWindowResized has been called, otherwise the
1031   // widget will not paint when restoring after a browser crash.  Also it needs
1032   // to be created after InitSecondaryDisplays() to initialize the wallpapers in
1033   // the correct size.
1034   user_wallpaper_delegate_->InitializeWallpaper();
1035
1036   if (initially_hide_cursor_)
1037     cursor_manager_.HideCursor();
1038   cursor_manager_.SetCursor(ui::kCursorPointer);
1039
1040 #if defined(OS_CHROMEOS)
1041   // Set accelerator controller delegates.
1042   accelerator_controller_->SetBrightnessControlDelegate(
1043       scoped_ptr<ash::BrightnessControlDelegate>(
1044           new ash::system::BrightnessControllerChromeos).Pass());
1045
1046   power_event_observer_.reset(new PowerEventObserver());
1047   user_activity_notifier_.reset(
1048       new ui::UserActivityPowerManagerNotifier(user_activity_detector_.get()));
1049   video_activity_notifier_.reset(
1050       new VideoActivityNotifier(video_detector_.get()));
1051   bluetooth_notification_controller_.reset(new BluetoothNotificationController);
1052   last_window_closed_logout_reminder_.reset(new LastWindowClosedLogoutReminder);
1053 #endif
1054
1055   weak_display_manager_factory_.reset(
1056       new base::WeakPtrFactory<DisplayManager>(display_manager_.get()));
1057   // The compositor thread and main message loop have to be running in
1058   // order to create mirror window. Run it after the main message loop
1059   // is started.
1060   base::MessageLoopForUI::current()->PostTask(
1061       FROM_HERE,
1062       base::Bind(&DisplayManager::CreateMirrorWindowIfAny,
1063                  weak_display_manager_factory_->GetWeakPtr()));
1064 }
1065
1066 void Shell::InitKeyboard() {
1067   if (keyboard::IsKeyboardEnabled()) {
1068     if (keyboard::KeyboardController::GetInstance()) {
1069       RootWindowControllerList controllers = GetAllRootWindowControllers();
1070       for (RootWindowControllerList::iterator iter = controllers.begin();
1071            iter != controllers.end(); ++iter) {
1072         (*iter)->DeactivateKeyboard(
1073             keyboard::KeyboardController::GetInstance());
1074       }
1075     }
1076     keyboard::KeyboardControllerProxy* proxy =
1077         delegate_->CreateKeyboardControllerProxy();
1078     keyboard::KeyboardController::ResetInstance(
1079         new keyboard::KeyboardController(proxy));
1080   }
1081 }
1082
1083 void Shell::InitRootWindow(aura::Window* root_window) {
1084   DCHECK(activation_client_);
1085   DCHECK(visibility_controller_.get());
1086   DCHECK(drag_drop_controller_.get());
1087
1088   aura::client::SetFocusClient(root_window, focus_client_.get());
1089   input_method_filter_->SetInputMethodPropertyInRootWindow(root_window);
1090   aura::client::SetActivationClient(root_window, activation_client_);
1091   ::wm::FocusController* focus_controller =
1092       static_cast< ::wm::FocusController*>(activation_client_);
1093   root_window->AddPreTargetHandler(focus_controller);
1094   aura::client::SetVisibilityClient(root_window, visibility_controller_.get());
1095   aura::client::SetDragDropClient(root_window, drag_drop_controller_.get());
1096   aura::client::SetScreenPositionClient(root_window,
1097                                         screen_position_controller_.get());
1098   aura::client::SetCursorClient(root_window, &cursor_manager_);
1099   aura::client::SetTooltipClient(root_window, tooltip_controller_.get());
1100   aura::client::SetEventClient(root_window, event_client_.get());
1101
1102   aura::client::SetWindowMoveClient(root_window,
1103       toplevel_window_event_handler_.get());
1104   root_window->AddPreTargetHandler(toplevel_window_event_handler_.get());
1105   root_window->AddPostTargetHandler(toplevel_window_event_handler_.get());
1106
1107   if (nested_accelerator_controller_) {
1108     aura::client::SetDispatcherClient(root_window,
1109                                       nested_accelerator_controller_.get());
1110   }
1111 }
1112
1113 bool Shell::CanWindowReceiveEvents(aura::Window* window) {
1114   RootWindowControllerList controllers = GetAllRootWindowControllers();
1115   for (RootWindowControllerList::iterator iter = controllers.begin();
1116        iter != controllers.end(); ++iter) {
1117     SystemModalContainerLayoutManager* layout_manager =
1118         (*iter)->GetSystemModalLayoutManager(window);
1119     if (layout_manager && layout_manager->CanWindowReceiveEvents(window))
1120       return true;
1121     // Allow events to fall through to the virtual keyboard even if displaying
1122     // a system modal dialog.
1123     if ((*iter)->IsVirtualKeyboardWindow(window))
1124       return true;
1125   }
1126
1127   return false;
1128 }
1129
1130 ////////////////////////////////////////////////////////////////////////////////
1131 // Shell, ui::EventTarget overrides:
1132
1133 bool Shell::CanAcceptEvent(const ui::Event& event) {
1134   return true;
1135 }
1136
1137 ui::EventTarget* Shell::GetParentTarget() {
1138   return aura::Env::GetInstance();
1139 }
1140
1141 scoped_ptr<ui::EventTargetIterator> Shell::GetChildIterator() const {
1142   return scoped_ptr<ui::EventTargetIterator>();
1143 }
1144
1145 ui::EventTargeter* Shell::GetEventTargeter() {
1146   NOTREACHED();
1147   return NULL;
1148 }
1149
1150 void Shell::OnEvent(ui::Event* event) {
1151 }
1152
1153 ////////////////////////////////////////////////////////////////////////////////
1154 // Shell, aura::client::ActivationChangeObserver implementation:
1155
1156 void Shell::OnWindowActivated(aura::Window* gained_active,
1157                               aura::Window* lost_active) {
1158   if (gained_active)
1159     target_root_window_ = gained_active->GetRootWindow();
1160 }
1161
1162 }  // namespace ash