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