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/ash_switches.h"
  15 #include "ash/autoclick/autoclick_controller.h"
  16 #include "ash/desktop_background/desktop_background_controller.h"
  17 #include "ash/desktop_background/desktop_background_view.h"
  18 #include "ash/desktop_background/user_wallpaper_delegate.h"
  19 #include "ash/display/cursor_window_controller.h"
  20 #include "ash/display/display_manager.h"
  21 #include "ash/display/event_transformation_handler.h"
  22 #include "ash/display/mouse_cursor_event_filter.h"
  23 #include "ash/display/screen_position_controller.h"
  24 #include "ash/display/window_tree_host_manager.h"
  25 #include "ash/drag_drop/drag_drop_controller.h"
  26 #include "ash/first_run/first_run_helper_impl.h"
  27 #include "ash/focus_cycler.h"
  28 #include "ash/frame/custom_frame_view_ash.h"
  29 #include "ash/gpu_support.h"
  30 #include "ash/high_contrast/high_contrast_controller.h"
  31 #include "ash/host/ash_window_tree_host_init_params.h"
  32 #include "ash/ime/input_method_event_handler.h"
  33 #include "ash/keyboard_uma_event_filter.h"
  34 #include "ash/magnifier/magnification_controller.h"
  35 #include "ash/magnifier/partial_magnification_controller.h"
  36 #include "ash/media_delegate.h"
  37 #include "ash/new_window_delegate.h"
  38 #include "ash/root_window_controller.h"
  39 #include "ash/session/session_state_delegate.h"
  40 #include "ash/shelf/app_list_shelf_item_delegate.h"
  41 #include "ash/shelf/shelf_delegate.h"
  42 #include "ash/shelf/shelf_item_delegate.h"
  43 #include "ash/shelf/shelf_item_delegate_manager.h"
  44 #include "ash/shelf/shelf_layout_manager.h"
  45 #include "ash/shelf/shelf_model.h"
  46 #include "ash/shelf/shelf_widget.h"
  47 #include "ash/shelf/shelf_window_watcher.h"
  48 #include "ash/shell_delegate.h"
  49 #include "ash/shell_factory.h"
  50 #include "ash/shell_init_params.h"
  51 #include "ash/shell_window_ids.h"
  52 #include "ash/system/locale/locale_notification_controller.h"
  53 #include "ash/system/status_area_widget.h"
  54 #include "ash/system/tray/system_tray_delegate.h"
  55 #include "ash/system/tray/system_tray_notifier.h"
  56 #include "ash/utility/partial_screenshot_controller.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/trace_event/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/base/user_activity/user_activity_detector.h"
  92 #include "ui/compositor/layer.h"
  93 #include "ui/compositor/layer_animator.h"
  94 #include "ui/events/event_target_iterator.h"
  95 #include "ui/gfx/display.h"
  96 #include "ui/gfx/geometry/size.h"
  97 #include "ui/gfx/image/image_skia.h"
  98 #include "ui/gfx/screen.h"
  99 #include "ui/keyboard/keyboard.h"
 100 #include "ui/keyboard/keyboard_controller.h"
 101 #include "ui/keyboard/keyboard_switches.h"
 102 #include "ui/keyboard/keyboard_util.h"
 103 #include "ui/message_center/message_center.h"
 104 #include "ui/views/corewm/tooltip_aura.h"
 105 #include "ui/views/corewm/tooltip_controller.h"
 106 #include "ui/views/focus/focus_manager_factory.h"
 107 #include "ui/views/widget/native_widget_aura.h"
 108 #include "ui/views/widget/widget.h"
 109 #include "ui/wm/core/accelerator_filter.h"
 110 #include "ui/wm/core/compound_event_filter.h"
 111 #include "ui/wm/core/focus_controller.h"
 112 #include "ui/wm/core/nested_accelerator_controller.h"
 113 #include "ui/wm/core/shadow_controller.h"
 114 #include "ui/wm/core/visibility_controller.h"
 115 #include "ui/wm/core/window_modality_controller.h"
 116
 117 #if defined(OS_CHROMEOS)
 118 #if defined(USE_X11)
 119 #include "ui/gfx/x/x11_types.h"
 120 #endif  // defined(USE_X11)
 121 #include "ash/accelerators/magnifier_key_scroller.h"
 122 #include "ash/accelerators/spoken_feedback_toggler.h"
 123 #include "ash/ash_constants.h"
 124 #include "ash/content/display/display_color_manager_chromeos.h"
 125 #include "ash/content/display/screen_orientation_controller_chromeos.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 "ash/touch/touch_transformer_controller.h"
 140 #include "ash/virtual_keyboard_controller.h"
 141 #include "base/bind_helpers.h"
 142 #include "base/sys_info.h"
 143 #include "chromeos/dbus/dbus_thread_manager.h"
 144 #include "ui/chromeos/user_activity_power_manager_notifier.h"
 145 #include "ui/display/chromeos/display_configurator.h"
 146 #endif  // defined(OS_CHROMEOS)
 147
 148 namespace ash {
 149
 150 namespace {
 151
 152 using aura::Window;
 153 using views::Widget;
 154
 155 // A Corewm VisibilityController subclass that calls the Ash animation routine
 156 // so we can pick up our extended animations. See ash/wm/window_animations.h.
 157 class AshVisibilityController : public ::wm::VisibilityController {
 158  public:
 159   AshVisibilityController() {}
 160   ~AshVisibilityController() override {}
 161
 162  private:
 163   // Overridden from ::wm::VisibilityController:
 164   bool CallAnimateOnChildWindowVisibilityChanged(aura::Window* window,
 165                                                  bool visible) override {
 166     return AnimateOnChildWindowVisibilityChanged(window, visible);
 167   }
 168
 169   DISALLOW_COPY_AND_ASSIGN(AshVisibilityController);
 170 };
 171
 172 AshWindowTreeHostInitParams ShellInitParamsToAshWindowTreeHostInitParams(
 173     const ShellInitParams& shell_init_params) {
 174   AshWindowTreeHostInitParams ash_init_params;
 175 #if defined(OS_WIN)
 176   ash_init_params.remote_hwnd = shell_init_params.remote_hwnd;
 177 #endif
 178   return ash_init_params;
 179 }
 180
 181 }  // namespace
 182
 183 // static
 184 Shell* Shell::instance_ = NULL;
 185 // static
 186 bool Shell::initially_hide_cursor_ = false;
 187
 188 ////////////////////////////////////////////////////////////////////////////////
 189 // Shell, public:
 190
 191 // static
 192 Shell* Shell::CreateInstance(const ShellInitParams& init_params) {
 193   CHECK(!instance_);
 194   instance_ = new Shell(init_params.delegate);
 195   instance_->Init(init_params);
 196   return instance_;
 197 }
 198
 199 // static
 200 Shell* Shell::GetInstance() {
 201   CHECK(instance_);
 202   return instance_;
 203 }
 204
 205 // static
 206 bool Shell::HasInstance() {
 207   return !!instance_;
 208 }
 209
 210 // static
 211 void Shell::DeleteInstance() {
 212   delete instance_;
 213   instance_ = NULL;
 214 }
 215
 216 // static
 217 RootWindowController* Shell::GetPrimaryRootWindowController() {
 218   CHECK(HasInstance());
 219   return GetRootWindowController(GetPrimaryRootWindow());
 220 }
 221
 222 // static
 223 Shell::RootWindowControllerList Shell::GetAllRootWindowControllers() {
 224   CHECK(HasInstance());
 225   return Shell::GetInstance()
 226       ->window_tree_host_manager()
 227       ->GetAllRootWindowControllers();
 228 }
 229
 230 // static
 231 aura::Window* Shell::GetPrimaryRootWindow() {
 232   CHECK(HasInstance());
 233   return GetInstance()->window_tree_host_manager()->GetPrimaryRootWindow();
 234 }
 235
 236 // static
 237 aura::Window* Shell::GetTargetRootWindow() {
 238   CHECK(HasInstance());
 239   Shell* shell = GetInstance();
 240   if (shell->scoped_target_root_window_)
 241     return shell->scoped_target_root_window_;
 242   return shell->target_root_window_;
 243 }
 244
 245 // static
 246 gfx::Screen* Shell::GetScreen() {
 247   return gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_ALTERNATE);
 248 }
 249
 250 // static
 251 aura::Window::Windows Shell::GetAllRootWindows() {
 252   CHECK(HasInstance());
 253   return Shell::GetInstance()->window_tree_host_manager()->GetAllRootWindows();
 254 }
 255
 256 // static
 257 aura::Window* Shell::GetContainer(aura::Window* root_window,
 258                                   int container_id) {
 259   return root_window->GetChildById(container_id);
 260 }
 261
 262 // static
 263 const aura::Window* Shell::GetContainer(const aura::Window* root_window,
 264                                         int container_id) {
 265   return root_window->GetChildById(container_id);
 266 }
 267
 268 // static
 269 std::vector<aura::Window*> Shell::GetContainersFromAllRootWindows(
 270     int container_id,
 271     aura::Window* priority_root) {
 272   std::vector<aura::Window*> containers;
 273   aura::Window::Windows root_windows = GetAllRootWindows();
 274   for (aura::Window::Windows::const_iterator it = root_windows.begin();
 275        it != root_windows.end(); ++it) {
 276     aura::Window* container = (*it)->GetChildById(container_id);
 277     if (container) {
 278       if (priority_root && priority_root->Contains(container))
 279         containers.insert(containers.begin(), container);
 280       else
 281         containers.push_back(container);
 282     }
 283   }
 284   return containers;
 285 }
 286
 287 void Shell::ShowContextMenu(const gfx::Point& location_in_screen,
 288                             ui::MenuSourceType source_type) {
 289   // No context menus if there is no session with an active user.
 290   if (!session_state_delegate_->NumberOfLoggedInUsers())
 291     return;
 292   // No context menus when screen is locked.
 293   if (session_state_delegate_->IsScreenLocked())
 294     return;
 295
 296   aura::Window* root =
 297       wm::GetRootWindowMatching(gfx::Rect(location_in_screen, gfx::Size()));
 298   GetRootWindowController(root)
 299       ->ShowContextMenu(location_in_screen, source_type);
 300 }
 301
 302 void Shell::ShowAppList(aura::Window* window) {
 303   // If the context window is not given, show it on the target root window.
 304   if (!window)
 305     window = GetTargetRootWindow();
 306   if (!app_list_controller_)
 307     app_list_controller_.reset(new AppListController);
 308   app_list_controller_->Show(window);
 309 }
 310
 311 void Shell::DismissAppList() {
 312   if (!app_list_controller_)
 313     return;
 314   app_list_controller_->Dismiss();
 315 }
 316
 317 void Shell::ToggleAppList(aura::Window* window) {
 318   if (app_list_controller_ && app_list_controller_->IsVisible()) {
 319     DismissAppList();
 320     return;
 321   }
 322
 323   ShowAppList(window);
 324 }
 325
 326 bool Shell::GetAppListTargetVisibility() const {
 327   return app_list_controller_.get() &&
 328       app_list_controller_->GetTargetVisibility();
 329 }
 330
 331 aura::Window* Shell::GetAppListWindow() {
 332   return app_list_controller_.get() ? app_list_controller_->GetWindow() : NULL;
 333 }
 334
 335 app_list::AppListView* Shell::GetAppListView() {
 336   return app_list_controller_.get() ? app_list_controller_->GetView() : NULL;
 337 }
 338
 339 bool Shell::IsSystemModalWindowOpen() const {
 340   if (simulate_modal_window_open_for_testing_)
 341     return true;
 342   const std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 343       kShellWindowId_SystemModalContainer, NULL);
 344   for (std::vector<aura::Window*>::const_iterator cit = containers.begin();
 345        cit != containers.end(); ++cit) {
 346     for (aura::Window::Windows::const_iterator wit = (*cit)->children().begin();
 347          wit != (*cit)->children().end(); ++wit) {
 348       if ((*wit)->GetProperty(aura::client::kModalKey) ==
 349           ui::MODAL_TYPE_SYSTEM && (*wit)->TargetVisibility()) {
 350         return true;
 351       }
 352     }
 353   }
 354   return false;
 355 }
 356
 357 views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
 358     views::Widget* widget) {
 359   // Use translucent-style window frames for dialogs.
 360   return new CustomFrameViewAsh(widget);
 361 }
 362
 363 void Shell::RotateFocus(Direction direction) {
 364   focus_cycler_->RotateFocus(direction == FORWARD ? FocusCycler::FORWARD
 365                                                   : FocusCycler::BACKWARD);
 366 }
 367
 368 void Shell::SetDisplayWorkAreaInsets(Window* contains,
 369                                      const gfx::Insets& insets) {
 370   if (!window_tree_host_manager_->UpdateWorkAreaOfDisplayNearestWindow(
 371           contains, insets)) {
 372     return;
 373   }
 374   FOR_EACH_OBSERVER(ShellObserver, observers_,
 375                     OnDisplayWorkAreaInsetsChanged());
 376 }
 377
 378 void Shell::OnLoginStateChanged(user::LoginStatus status) {
 379   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLoginStateChanged(status));
 380 }
 381
 382 void Shell::OnLoginUserProfilePrepared() {
 383   CreateShelf();
 384   CreateKeyboard();
 385 }
 386
 387 void Shell::UpdateAfterLoginStatusChange(user::LoginStatus status) {
 388   RootWindowControllerList controllers = GetAllRootWindowControllers();
 389   for (RootWindowControllerList::iterator iter = controllers.begin();
 390        iter != controllers.end(); ++iter)
 391     (*iter)->UpdateAfterLoginStatusChange(status);
 392 }
 393
 394 void Shell::OnAppTerminating() {
 395   FOR_EACH_OBSERVER(ShellObserver, observers_, OnAppTerminating());
 396 }
 397
 398 void Shell::OnLockStateChanged(bool locked) {
 399   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLockStateChanged(locked));
 400 #ifndef NDEBUG
 401   // Make sure that there is no system modal in Lock layer when unlocked.
 402   if (!locked) {
 403     std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 404         kShellWindowId_LockSystemModalContainer, GetPrimaryRootWindow());
 405     for (std::vector<aura::Window*>::const_iterator iter = containers.begin();
 406          iter != containers.end(); ++iter) {
 407       DCHECK_EQ(0u, (*iter)->children().size());
 408     }
 409   }
 410 #endif
 411 }
 412
 413 void Shell::OnCastingSessionStartedOrStopped(bool started) {
 414 #if defined(OS_CHROMEOS)
 415   FOR_EACH_OBSERVER(ShellObserver, observers_,
 416                     OnCastingSessionStartedOrStopped(started));
 417 #endif
 418 }
 419
 420 void Shell::OnOverviewModeStarting() {
 421   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeStarting());
 422 }
 423
 424 void Shell::OnOverviewModeEnded() {
 425   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeEnded());
 426 }
 427
 428 void Shell::OnMaximizeModeStarted() {
 429   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeStarted());
 430 }
 431
 432 void Shell::OnMaximizeModeEnded() {
 433   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeEnded());
 434 }
 435
 436 void Shell::OnRootWindowAdded(aura::Window* root_window) {
 437   FOR_EACH_OBSERVER(ShellObserver, observers_, OnRootWindowAdded(root_window));
 438 }
 439
 440 void Shell::CreateShelf() {
 441   RootWindowControllerList controllers = GetAllRootWindowControllers();
 442   for (RootWindowControllerList::iterator iter = controllers.begin();
 443        iter != controllers.end(); ++iter)
 444     (*iter)->shelf()->CreateShelf();
 445 }
 446
 447 void Shell::OnShelfCreatedForRootWindow(aura::Window* root_window) {
 448   FOR_EACH_OBSERVER(ShellObserver,
 449                     observers_,
 450                     OnShelfCreatedForRootWindow(root_window));
 451 }
 452
 453 void Shell::CreateKeyboard() {
 454   // TODO(bshe): Primary root window controller may not be the controller to
 455   // attach virtual keyboard. See http://crbug.com/303429
 456   InitKeyboard();
 457   GetPrimaryRootWindowController()->
 458       ActivateKeyboard(keyboard::KeyboardController::GetInstance());
 459 }
 460
 461 void Shell::DeactivateKeyboard() {
 462   if (keyboard::KeyboardController::GetInstance()) {
 463     RootWindowControllerList controllers = GetAllRootWindowControllers();
 464     for (RootWindowControllerList::iterator iter = controllers.begin();
 465         iter != controllers.end(); ++iter) {
 466       (*iter)->DeactivateKeyboard(keyboard::KeyboardController::GetInstance());
 467     }
 468   }
 469   keyboard::KeyboardController::ResetInstance(NULL);
 470 }
 471
 472 void Shell::ShowShelf() {
 473   RootWindowControllerList controllers = GetAllRootWindowControllers();
 474   for (RootWindowControllerList::iterator iter = controllers.begin();
 475        iter != controllers.end(); ++iter)
 476     (*iter)->ShowShelf();
 477 }
 478
 479 void Shell::AddShellObserver(ShellObserver* observer) {
 480   observers_.AddObserver(observer);
 481 }
 482
 483 void Shell::RemoveShellObserver(ShellObserver* observer) {
 484   observers_.RemoveObserver(observer);
 485 }
 486
 487 #if defined(OS_CHROMEOS)
 488 bool Shell::ShouldSaveDisplaySettings() {
 489   return !(screen_orientation_controller_
 490                ->ignore_display_configuration_updates() ||
 491            resolution_notification_controller_->DoesNotificationTimeout());
 492 }
 493 #endif
 494
 495 void Shell::UpdateShelfVisibility() {
 496   RootWindowControllerList controllers = GetAllRootWindowControllers();
 497   for (RootWindowControllerList::iterator iter = controllers.begin();
 498        iter != controllers.end(); ++iter)
 499     if ((*iter)->shelf())
 500       (*iter)->UpdateShelfVisibility();
 501 }
 502
 503 void Shell::SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior,
 504                                      aura::Window* root_window) {
 505   ash::ShelfLayoutManager::ForShelf(root_window)->SetAutoHideBehavior(behavior);
 506 }
 507
 508 ShelfAutoHideBehavior Shell::GetShelfAutoHideBehavior(
 509     aura::Window* root_window) const {
 510   return ash::ShelfLayoutManager::ForShelf(root_window)->auto_hide_behavior();
 511 }
 512
 513 void Shell::SetShelfAlignment(ShelfAlignment alignment,
 514                               aura::Window* root_window) {
 515   if (ash::ShelfLayoutManager::ForShelf(root_window)->SetAlignment(alignment)) {
 516     FOR_EACH_OBSERVER(
 517         ShellObserver, observers_, OnShelfAlignmentChanged(root_window));
 518   }
 519 }
 520
 521 ShelfAlignment Shell::GetShelfAlignment(const aura::Window* root_window) {
 522   return GetRootWindowController(root_window)
 523       ->GetShelfLayoutManager()
 524       ->GetAlignment();
 525 }
 526
 527 void Shell::SetDimming(bool should_dim) {
 528   RootWindowControllerList controllers = GetAllRootWindowControllers();
 529   for (RootWindowControllerList::iterator iter = controllers.begin();
 530        iter != controllers.end(); ++iter)
 531     (*iter)->screen_dimmer()->SetDimming(should_dim);
 532 }
 533
 534 void Shell::NotifyFullscreenStateChange(bool is_fullscreen,
 535                                         aura::Window* root_window) {
 536   FOR_EACH_OBSERVER(ShellObserver, observers_, OnFullscreenStateChanged(
 537       is_fullscreen, root_window));
 538 }
 539
 540 void Shell::CreateModalBackground(aura::Window* window) {
 541   if (!modality_filter_) {
 542     modality_filter_.reset(new SystemModalContainerEventFilter(this));
 543     AddPreTargetHandler(modality_filter_.get());
 544   }
 545   RootWindowControllerList controllers = GetAllRootWindowControllers();
 546   for (RootWindowControllerList::iterator iter = controllers.begin();
 547        iter != controllers.end(); ++iter)
 548     (*iter)->GetSystemModalLayoutManager(window)->CreateModalBackground();
 549 }
 550
 551 void Shell::OnModalWindowRemoved(aura::Window* removed) {
 552   RootWindowControllerList controllers = GetAllRootWindowControllers();
 553   bool activated = false;
 554   for (RootWindowControllerList::iterator iter = controllers.begin();
 555        iter != controllers.end() && !activated; ++iter) {
 556     activated = (*iter)->GetSystemModalLayoutManager(removed)->
 557         ActivateNextModalWindow();
 558   }
 559   if (!activated) {
 560     RemovePreTargetHandler(modality_filter_.get());
 561     modality_filter_.reset();
 562     for (RootWindowControllerList::iterator iter = controllers.begin();
 563          iter != controllers.end(); ++iter)
 564       (*iter)->GetSystemModalLayoutManager(removed)->DestroyModalBackground();
 565   }
 566 }
 567
 568 WebNotificationTray* Shell::GetWebNotificationTray() {
 569   return GetPrimaryRootWindowController()->shelf()->
 570       status_area_widget()->web_notification_tray();
 571 }
 572
 573 bool Shell::HasPrimaryStatusArea() {
 574   ShelfWidget* shelf = GetPrimaryRootWindowController()->shelf();
 575   return shelf && shelf->status_area_widget();
 576 }
 577
 578 SystemTray* Shell::GetPrimarySystemTray() {
 579   return GetPrimaryRootWindowController()->GetSystemTray();
 580 }
 581
 582 ShelfDelegate* Shell::GetShelfDelegate() {
 583   if (!shelf_delegate_) {
 584     shelf_model_.reset(new ShelfModel);
 585     // Creates ShelfItemDelegateManager before ShelfDelegate.
 586     shelf_item_delegate_manager_.reset(
 587         new ShelfItemDelegateManager(shelf_model_.get()));
 588
 589     shelf_delegate_.reset(delegate_->CreateShelfDelegate(shelf_model_.get()));
 590     scoped_ptr<ShelfItemDelegate> controller(new AppListShelfItemDelegate);
 591
 592     // Finding the shelf model's location of the app list and setting its
 593     // ShelfItemDelegate.
 594     int app_list_index = shelf_model_->GetItemIndexForType(TYPE_APP_LIST);
 595     DCHECK_GE(app_list_index, 0);
 596     ShelfID app_list_id = shelf_model_->items()[app_list_index].id;
 597     DCHECK(app_list_id);
 598     shelf_item_delegate_manager_->SetShelfItemDelegate(app_list_id,
 599                                                        controller.Pass());
 600     shelf_window_watcher_.reset(new ShelfWindowWatcher(
 601         shelf_model_.get(), shelf_item_delegate_manager_.get()));
 602   }
 603   return shelf_delegate_.get();
 604 }
 605
 606 void Shell::SetTouchHudProjectionEnabled(bool enabled) {
 607   if (is_touch_hud_projection_enabled_ == enabled)
 608     return;
 609
 610   is_touch_hud_projection_enabled_ = enabled;
 611   FOR_EACH_OBSERVER(ShellObserver, observers_,
 612                     OnTouchHudProjectionToggled(enabled));
 613 }
 614
 615 #if defined(OS_CHROMEOS)
 616 ash::FirstRunHelper* Shell::CreateFirstRunHelper() {
 617   return new ash::FirstRunHelperImpl;
 618 }
 619
 620 void Shell::SetCursorCompositingEnabled(bool enabled) {
 621   window_tree_host_manager_->cursor_window_controller()
 622       ->SetCursorCompositingEnabled(enabled);
 623   native_cursor_manager_->SetNativeCursorEnabled(!enabled);
 624 }
 625 #endif  // defined(OS_CHROMEOS)
 626
 627 void Shell::DoInitialWorkspaceAnimation() {
 628   return GetPrimaryRootWindowController()->workspace_controller()->
 629       DoInitialAnimation();
 630 }
 631
 632 ////////////////////////////////////////////////////////////////////////////////
 633 // Shell, private:
 634
 635 Shell::Shell(ShellDelegate* delegate)
 636     : target_root_window_(NULL),
 637       scoped_target_root_window_(NULL),
 638       delegate_(delegate),
 639       window_positioner_(new WindowPositioner),
 640       activation_client_(NULL),
 641 #if defined(OS_CHROMEOS)
 642       display_configurator_(new ui::DisplayConfigurator()),
 643 #endif  // defined(OS_CHROMEOS)
 644       native_cursor_manager_(new AshNativeCursorManager),
 645       cursor_manager_(
 646           scoped_ptr<::wm::NativeCursorManager>(native_cursor_manager_)),
 647       simulate_modal_window_open_for_testing_(false),
 648       is_touch_hud_projection_enabled_(false) {
 649   DCHECK(delegate_.get());
 650   gpu_support_.reset(delegate_->CreateGPUSupport());
 651   display_manager_.reset(new DisplayManager);
 652   window_tree_host_manager_.reset(new WindowTreeHostManager);
 653   user_metrics_recorder_.reset(new UserMetricsRecorder);
 654
 655 #if defined(OS_CHROMEOS)
 656   PowerStatus::Initialize();
 657 #endif
 658 }
 659
 660 Shell::~Shell() {
 661   TRACE_EVENT0("shutdown", "ash::Shell::Destructor");
 662
 663   user_metrics_recorder_->OnShellShuttingDown();
 664
 665   delegate_->PreShutdown();
 666
 667   views::FocusManagerFactory::Install(NULL);
 668
 669   // Remove the focus from any window. This will prevent overhead and side
 670   // effects (e.g. crashes) from changing focus during shutdown.
 671   // See bug crbug.com/134502.
 672   aura::client::GetFocusClient(GetPrimaryRootWindow())->FocusWindow(NULL);
 673
 674   // Please keep in same order as in Init() because it's easy to miss one.
 675   if (window_modality_controller_)
 676     window_modality_controller_.reset();
 677   RemovePreTargetHandler(
 678       window_tree_host_manager_->input_method_event_handler());
 679 #if defined(OS_CHROMEOS)
 680   RemovePreTargetHandler(magnifier_key_scroll_handler_.get());
 681   magnifier_key_scroll_handler_.reset();
 682
 683   RemovePreTargetHandler(speech_feedback_handler_.get());
 684   speech_feedback_handler_.reset();
 685 #endif
 686   RemovePreTargetHandler(overlay_filter_.get());
 687   RemovePreTargetHandler(accelerator_filter_.get());
 688   RemovePreTargetHandler(event_transformation_handler_.get());
 689   RemovePreTargetHandler(toplevel_window_event_handler_.get());
 690   RemovePostTargetHandler(toplevel_window_event_handler_.get());
 691   RemovePreTargetHandler(system_gesture_filter_.get());
 692   RemovePreTargetHandler(keyboard_metrics_filter_.get());
 693   RemovePreTargetHandler(mouse_cursor_filter_.get());
 694
 695   // TooltipController is deleted with the Shell so removing its references.
 696   RemovePreTargetHandler(tooltip_controller_.get());
 697
 698 #if defined(OS_CHROMEOS)
 699   screen_orientation_controller_.reset();
 700 #endif
 701
 702 // Destroy the virtual keyboard controller before the maximize mode controller
 703 // since the latters destructor triggers events that the former is listening
 704 // to but no longer cares about.
 705 #if defined(OS_CHROMEOS)
 706   virtual_keyboard_controller_.reset();
 707 #endif
 708
 709   // Destroy maximize mode controller early on since it has some observers which
 710   // need to be removed.
 711   maximize_mode_controller_.reset();
 712
 713   // AppList needs to be released before shelf layout manager, which is
 714   // destroyed with shelf container in the loop below. However, app list
 715   // container is now on top of shelf container and released after it.
 716   // TODO(xiyuan): Move it back when app list container is no longer needed.
 717   app_list_controller_.reset();
 718
 719 #if defined(OS_CHROMEOS)
 720   // Destroy the LastWindowClosedLogoutReminder before the
 721   // LogoutConfirmationController.
 722   last_window_closed_logout_reminder_.reset();
 723
 724   // Destroy the LogoutConfirmationController before the SystemTrayDelegate.
 725   logout_confirmation_controller_.reset();
 726 #endif
 727
 728   // Destroy SystemTrayDelegate before destroying the status area(s).
 729   system_tray_delegate_->Shutdown();
 730   system_tray_delegate_.reset();
 731
 732   locale_notification_controller_.reset();
 733
 734   // Drag-and-drop must be canceled prior to close all windows.
 735   drag_drop_controller_.reset();
 736
 737   // Controllers who have WindowObserver added must be deleted
 738   // before |window_tree_host_manager_| is deleted.
 739
 740 #if defined(OS_CHROMEOS)
 741   // VideoActivityNotifier must be deleted before |video_detector_| is
 742   // deleted because it's observing video activity through
 743   // VideoDetectorObserver interface.
 744   video_activity_notifier_.reset();
 745 #endif  // defined(OS_CHROMEOS)
 746   video_detector_.reset();
 747   high_contrast_controller_.reset();
 748
 749   shadow_controller_.reset();
 750   resize_shadow_controller_.reset();
 751
 752   window_cycle_controller_.reset();
 753   window_selector_controller_.reset();
 754
 755   // |shelf_window_watcher_| has a weak pointer to |shelf_Model_|
 756   // and has window observers.
 757   shelf_window_watcher_.reset();
 758
 759   // Destroy all child windows including widgets.
 760   window_tree_host_manager_->CloseChildWindows();
 761   // MruWindowTracker must be destroyed after all windows have been deleted to
 762   // avoid a possible crash when Shell is destroyed from a non-normal shutdown
 763   // path. (crbug.com/485438).
 764   mru_window_tracker_.reset();
 765
 766   // Chrome implementation of shelf delegate depends on FocusClient,
 767   // so must be deleted before |focus_client_|.
 768   shelf_delegate_.reset();
 769   focus_client_.reset();
 770
 771   // Destroy SystemTrayNotifier after destroying SystemTray as TrayItems
 772   // needs to remove observers from it.
 773   system_tray_notifier_.reset();
 774
 775   // These need a valid Shell instance to clean up properly, so explicitly
 776   // delete them before invalidating the instance.
 777   // Alphabetical. TODO(oshima): sort.
 778   magnification_controller_.reset();
 779   partial_magnification_controller_.reset();
 780   tooltip_controller_.reset();
 781   event_client_.reset();
 782   nested_accelerator_controller_.reset();
 783   toplevel_window_event_handler_.reset();
 784   visibility_controller_.reset();
 785   // |shelf_item_delegate_manager_| observes |shelf_model_|. It must be
 786   // destroyed before |shelf_model_| is destroyed.
 787   shelf_item_delegate_manager_.reset();
 788   shelf_model_.reset();
 789
 790   power_button_controller_.reset();
 791   lock_state_controller_.reset();
 792
 793 #if defined(OS_CHROMEOS)
 794   resolution_notification_controller_.reset();
 795 #endif
 796   desktop_background_controller_.reset();
 797   partial_screenshot_controller_.reset();
 798   mouse_cursor_filter_.reset();
 799
 800 #if defined(OS_CHROMEOS)
 801   touch_transformer_controller_.reset();
 802 #endif  // defined(OS_CHROMEOS)
 803
 804   // This also deletes all RootWindows. Note that we invoke Shutdown() on
 805   // WindowTreeHostManager before resetting |window_tree_host_manager_|, since
 806   // destruction
 807   // of its owned RootWindowControllers relies on the value.
 808   display_manager_->CreateScreenForShutdown();
 809   window_tree_host_manager_->Shutdown();
 810   window_tree_host_manager_.reset();
 811   screen_position_controller_.reset();
 812   accessibility_delegate_.reset();
 813   new_window_delegate_.reset();
 814   media_delegate_.reset();
 815
 816   keyboard::KeyboardController::ResetInstance(nullptr);
 817
 818 #if defined(OS_CHROMEOS)
 819   display_color_manager_.reset();
 820   if (display_change_observer_)
 821     display_configurator_->RemoveObserver(display_change_observer_.get());
 822   if (display_configurator_animation_)
 823     display_configurator_->RemoveObserver(
 824         display_configurator_animation_.get());
 825   if (display_error_observer_)
 826     display_configurator_->RemoveObserver(display_error_observer_.get());
 827   if (projecting_observer_) {
 828     display_configurator_->RemoveObserver(projecting_observer_.get());
 829     RemoveShellObserver(projecting_observer_.get());
 830   }
 831   display_change_observer_.reset();
 832
 833   PowerStatus::Shutdown();
 834
 835   // Ensure that DBusThreadManager outlives this Shell.
 836   DCHECK(chromeos::DBusThreadManager::IsInitialized());
 837 #endif
 838
 839   DCHECK(instance_ == this);
 840   instance_ = NULL;
 841 }
 842
 843 void Shell::Init(const ShellInitParams& init_params) {
 844   delegate_->PreInit();
 845   bool display_initialized = display_manager_->InitFromCommandLine();
 846 #if defined(OS_CHROMEOS)
 847   display_configurator_->Init(!gpu_support_->IsPanelFittingDisabled());
 848   display_configurator_animation_.reset(new DisplayConfiguratorAnimation());
 849   display_configurator_->AddObserver(display_configurator_animation_.get());
 850
 851   // The DBusThreadManager must outlive this Shell. See the DCHECK in ~Shell.
 852   chromeos::DBusThreadManager* dbus_thread_manager =
 853       chromeos::DBusThreadManager::Get();
 854   projecting_observer_.reset(
 855       new ProjectingObserver(dbus_thread_manager->GetPowerManagerClient()));
 856   display_configurator_->AddObserver(projecting_observer_.get());
 857   AddShellObserver(projecting_observer_.get());
 858
 859   if (!display_initialized && base::SysInfo::IsRunningOnChromeOS()) {
 860     display_change_observer_.reset(new DisplayChangeObserver);
 861     // Register |display_change_observer_| first so that the rest of
 862     // observer gets invoked after the root windows are configured.
 863     display_configurator_->AddObserver(display_change_observer_.get());
 864     display_error_observer_.reset(new DisplayErrorObserver());
 865     display_configurator_->AddObserver(display_error_observer_.get());
 866     display_configurator_->set_state_controller(display_change_observer_.get());
 867     display_configurator_->set_mirroring_controller(display_manager_.get());
 868     display_configurator_->ForceInitialConfigure(
 869         delegate_->IsFirstRunAfterBoot() ? kChromeOsBootColor : 0);
 870     display_initialized = true;
 871   }
 872   display_color_manager_.reset(
 873       new DisplayColorManager(display_configurator_.get()));
 874 #endif  // defined(OS_CHROMEOS)
 875   if (!display_initialized)
 876     display_manager_->InitDefaultDisplay();
 877
 878   display_manager_->RefreshFontParams();
 879
 880   // Install the custom factory first so that views::FocusManagers for Tray,
 881   // Shelf, and WallPaper could be created by the factory.
 882   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
 883
 884   aura::Env::CreateInstance(true);
 885   aura::Env::GetInstance()->set_context_factory(init_params.context_factory);
 886
 887   // The WindowModalityController needs to be at the front of the input event
 888   // pretarget handler list to ensure that it processes input events when modal
 889   // windows are active.
 890   window_modality_controller_.reset(
 891       new ::wm::WindowModalityController(this));
 892
 893   env_filter_.reset(new ::wm::CompoundEventFilter);
 894   AddPreTargetHandler(env_filter_.get());
 895
 896   wm::AshFocusRules* focus_rules = new wm::AshFocusRules();
 897
 898   ::wm::FocusController* focus_controller =
 899       new ::wm::FocusController(focus_rules);
 900   focus_client_.reset(focus_controller);
 901   activation_client_ = focus_controller;
 902   activation_client_->AddObserver(this);
 903   focus_cycler_.reset(new FocusCycler());
 904
 905   screen_position_controller_.reset(new ScreenPositionController);
 906
 907   window_tree_host_manager_->Start();
 908   window_tree_host_manager_->CreatePrimaryHost(
 909       ShellInitParamsToAshWindowTreeHostInitParams(init_params));
 910   aura::Window* root_window = window_tree_host_manager_->GetPrimaryRootWindow();
 911   target_root_window_ = root_window;
 912
 913 #if defined(OS_CHROMEOS)
 914   resolution_notification_controller_.reset(
 915       new ResolutionNotificationController);
 916 #endif
 917
 918   cursor_manager_.SetDisplay(GetScreen()->GetPrimaryDisplay());
 919
 920   nested_accelerator_controller_.reset(
 921       new ::wm::NestedAcceleratorController(new NestedAcceleratorDelegate));
 922   accelerator_controller_.reset(new AcceleratorController);
 923   maximize_mode_controller_.reset(new MaximizeModeController());
 924
 925   AddPreTargetHandler(window_tree_host_manager_->input_method_event_handler());
 926
 927 #if defined(OS_CHROMEOS)
 928   magnifier_key_scroll_handler_ = MagnifierKeyScroller::CreateHandler();
 929   AddPreTargetHandler(magnifier_key_scroll_handler_.get());
 930   speech_feedback_handler_ = SpokenFeedbackToggler::CreateHandler();
 931   AddPreTargetHandler(speech_feedback_handler_.get());
 932 #endif
 933
 934   // The order in which event filters are added is significant.
 935
 936   // ui::UserActivityDetector passes events to observers, so let them get
 937   // rewritten first.
 938   user_activity_detector_.reset(new ui::UserActivityDetector);
 939
 940   overlay_filter_.reset(new OverlayEventFilter);
 941   AddPreTargetHandler(overlay_filter_.get());
 942   AddShellObserver(overlay_filter_.get());
 943
 944   accelerator_filter_.reset(new ::wm::AcceleratorFilter(
 945       scoped_ptr< ::wm::AcceleratorDelegate>(new AcceleratorDelegate).Pass(),
 946       accelerator_controller_->accelerator_history()));
 947   AddPreTargetHandler(accelerator_filter_.get());
 948
 949   event_transformation_handler_.reset(new EventTransformationHandler);
 950   AddPreTargetHandler(event_transformation_handler_.get());
 951
 952   toplevel_window_event_handler_.reset(new ToplevelWindowEventHandler);
 953
 954   system_gesture_filter_.reset(new SystemGestureEventFilter);
 955   AddPreTargetHandler(system_gesture_filter_.get());
 956
 957   keyboard_metrics_filter_.reset(new KeyboardUMAEventFilter);
 958   AddPreTargetHandler(keyboard_metrics_filter_.get());
 959
 960   // The keyboard system must be initialized before the RootWindowController is
 961   // created.
 962 #if defined(OS_CHROMEOS)
 963     keyboard::InitializeKeyboard();
 964 #endif
 965
 966 #if defined(OS_CHROMEOS)
 967   sticky_keys_controller_.reset(new StickyKeysController);
 968 #endif
 969
 970   lock_state_controller_.reset(new LockStateController);
 971   power_button_controller_.reset(new PowerButtonController(
 972       lock_state_controller_.get()));
 973 #if defined(OS_CHROMEOS)
 974   // Pass the initial display state to PowerButtonController.
 975   power_button_controller_->OnDisplayModeChanged(
 976       display_configurator_->cached_displays());
 977 #endif
 978   AddShellObserver(lock_state_controller_.get());
 979
 980   drag_drop_controller_.reset(new DragDropController);
 981   // |partial_screenshot_controller_| needs to be created (and prepended as a
 982   // pre-target handler) at this point, because |mouse_cursor_filter_| needs to
 983   // process mouse events prior to partial screenshot session.
 984   // See http://crbug.com/459214
 985   partial_screenshot_controller_.reset(new PartialScreenshotController());
 986   mouse_cursor_filter_.reset(new MouseCursorEventFilter());
 987   PrependPreTargetHandler(mouse_cursor_filter_.get());
 988
 989   // Create Controllers that may need root window.
 990   // TODO(oshima): Move as many controllers before creating
 991   // RootWindowController as possible.
 992   visibility_controller_.reset(new AshVisibilityController);
 993
 994   magnification_controller_.reset(
 995       MagnificationController::CreateInstance());
 996   mru_window_tracker_.reset(new MruWindowTracker(activation_client_,
 997                                                  focus_rules));
 998
 999   partial_magnification_controller_.reset(
1000       new PartialMagnificationController());
1001
1002   autoclick_controller_.reset(AutoclickController::CreateInstance());
1003
1004   high_contrast_controller_.reset(new HighContrastController);
1005   video_detector_.reset(new VideoDetector);
1006   window_selector_controller_.reset(new WindowSelectorController());
1007   window_cycle_controller_.reset(new WindowCycleController());
1008
1009   tooltip_controller_.reset(new views::corewm::TooltipController(
1010       scoped_ptr<views::corewm::Tooltip>(new views::corewm::TooltipAura)));
1011   AddPreTargetHandler(tooltip_controller_.get());
1012
1013   event_client_.reset(new EventClientImpl);
1014
1015   // This controller needs to be set before SetupManagedWindowMode.
1016   desktop_background_controller_.reset(new DesktopBackgroundController());
1017   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
1018
1019   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
1020   accessibility_delegate_.reset(delegate_->CreateAccessibilityDelegate());
1021   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
1022   media_delegate_.reset(delegate_->CreateMediaDelegate());
1023
1024   resize_shadow_controller_.reset(new ResizeShadowController());
1025   shadow_controller_.reset(
1026       new ::wm::ShadowController(activation_client_));
1027
1028   // Create system_tray_notifier_ before the delegate.
1029   system_tray_notifier_.reset(new ash::SystemTrayNotifier());
1030
1031   // Initialize system_tray_delegate_ before initializing StatusAreaWidget.
1032   system_tray_delegate_.reset(delegate()->CreateSystemTrayDelegate());
1033   DCHECK(system_tray_delegate_.get());
1034
1035   locale_notification_controller_.reset(new LocaleNotificationController);
1036
1037   // Initialize system_tray_delegate_ after StatusAreaWidget is created.
1038   system_tray_delegate_->Initialize();
1039
1040 #if defined(OS_CHROMEOS)
1041   // Create the LogoutConfirmationController after the SystemTrayDelegate.
1042   logout_confirmation_controller_.reset(new LogoutConfirmationController(
1043       base::Bind(&SystemTrayDelegate::SignOut,
1044                  base::Unretained(system_tray_delegate_.get()))));
1045
1046   // Create TouchTransformerController before
1047   // WindowTreeHostManager::InitDisplays()
1048   // since TouchTransformerController listens on
1049   // WindowTreeHostManager::Observer::OnDisplaysInitialized().
1050   touch_transformer_controller_.reset(new TouchTransformerController());
1051 #endif  // defined(OS_CHROMEOS)
1052
1053   window_tree_host_manager_->InitHosts();
1054
1055 #if defined(OS_CHROMEOS)
1056   // Needs to be created after InitDisplays() since it may cause the virtual
1057   // keyboard to be deployed.
1058   virtual_keyboard_controller_.reset(new VirtualKeyboardController);
1059 #endif  // defined(OS_CHROMEOS)
1060
1061   // It needs to be created after RootWindowController has been created
1062   // (which calls OnWindowResized has been called, otherwise the
1063   // widget will not paint when restoring after a browser crash.  Also it needs
1064   // to be created after InitSecondaryDisplays() to initialize the wallpapers in
1065   // the correct size.
1066   user_wallpaper_delegate_->InitializeWallpaper();
1067
1068   if (initially_hide_cursor_)
1069     cursor_manager_.HideCursor();
1070   cursor_manager_.SetCursor(ui::kCursorPointer);
1071
1072 #if defined(OS_CHROMEOS)
1073   // Set accelerator controller delegates.
1074   accelerator_controller_->SetBrightnessControlDelegate(
1075       scoped_ptr<ash::BrightnessControlDelegate>(
1076           new ash::system::BrightnessControllerChromeos).Pass());
1077
1078   power_event_observer_.reset(new PowerEventObserver());
1079   user_activity_notifier_.reset(
1080       new ui::UserActivityPowerManagerNotifier(user_activity_detector_.get()));
1081   video_activity_notifier_.reset(
1082       new VideoActivityNotifier(video_detector_.get()));
1083   bluetooth_notification_controller_.reset(new BluetoothNotificationController);
1084   last_window_closed_logout_reminder_.reset(new LastWindowClosedLogoutReminder);
1085   screen_orientation_controller_.reset(new ScreenOrientationController());
1086 #endif
1087   // The compositor thread and main message loop have to be running in
1088   // order to create mirror window. Run it after the main message loop
1089   // is started.
1090   display_manager_->CreateMirrorWindowAsyncIfAny();
1091
1092   user_metrics_recorder_->OnShellInitialized();
1093 }
1094
1095 void Shell::InitKeyboard() {
1096   if (keyboard::IsKeyboardEnabled()) {
1097     if (keyboard::KeyboardController::GetInstance()) {
1098       RootWindowControllerList controllers = GetAllRootWindowControllers();
1099       for (RootWindowControllerList::iterator iter = controllers.begin();
1100            iter != controllers.end(); ++iter) {
1101         (*iter)->DeactivateKeyboard(
1102             keyboard::KeyboardController::GetInstance());
1103       }
1104     }
1105     keyboard::KeyboardControllerProxy* proxy =
1106         delegate_->CreateKeyboardControllerProxy();
1107     keyboard::KeyboardController::ResetInstance(
1108         new keyboard::KeyboardController(proxy));
1109   }
1110 }
1111
1112 void Shell::InitRootWindow(aura::Window* root_window) {
1113   DCHECK(activation_client_);
1114   DCHECK(visibility_controller_.get());
1115   DCHECK(drag_drop_controller_.get());
1116
1117   aura::client::SetFocusClient(root_window, focus_client_.get());
1118   aura::client::SetActivationClient(root_window, activation_client_);
1119   ::wm::FocusController* focus_controller =
1120       static_cast< ::wm::FocusController*>(activation_client_);
1121   root_window->AddPreTargetHandler(focus_controller);
1122   aura::client::SetVisibilityClient(root_window, visibility_controller_.get());
1123   aura::client::SetDragDropClient(root_window, drag_drop_controller_.get());
1124   aura::client::SetScreenPositionClient(root_window,
1125                                         screen_position_controller_.get());
1126   aura::client::SetCursorClient(root_window, &cursor_manager_);
1127   aura::client::SetTooltipClient(root_window, tooltip_controller_.get());
1128   aura::client::SetEventClient(root_window, event_client_.get());
1129
1130   aura::client::SetWindowMoveClient(root_window,
1131       toplevel_window_event_handler_.get());
1132   root_window->AddPreTargetHandler(toplevel_window_event_handler_.get());
1133   root_window->AddPostTargetHandler(toplevel_window_event_handler_.get());
1134
1135   if (nested_accelerator_controller_) {
1136     aura::client::SetDispatcherClient(root_window,
1137                                       nested_accelerator_controller_.get());
1138   }
1139 }
1140
1141 bool Shell::CanWindowReceiveEvents(aura::Window* window) {
1142   RootWindowControllerList controllers = GetAllRootWindowControllers();
1143   for (RootWindowControllerList::iterator iter = controllers.begin();
1144        iter != controllers.end(); ++iter) {
1145     SystemModalContainerLayoutManager* layout_manager =
1146         (*iter)->GetSystemModalLayoutManager(window);
1147     if (layout_manager && layout_manager->CanWindowReceiveEvents(window))
1148       return true;
1149     // Allow events to fall through to the virtual keyboard even if displaying
1150     // a system modal dialog.
1151     if ((*iter)->IsVirtualKeyboardWindow(window))
1152       return true;
1153   }
1154
1155   return false;
1156 }
1157
1158 ////////////////////////////////////////////////////////////////////////////////
1159 // Shell, ui::EventTarget overrides:
1160
1161 bool Shell::CanAcceptEvent(const ui::Event& event) {
1162   return true;
1163 }
1164
1165 ui::EventTarget* Shell::GetParentTarget() {
1166   return aura::Env::GetInstance();
1167 }
1168
1169 scoped_ptr<ui::EventTargetIterator> Shell::GetChildIterator() const {
1170   return scoped_ptr<ui::EventTargetIterator>();
1171 }
1172
1173 ui::EventTargeter* Shell::GetEventTargeter() {
1174   NOTREACHED();
1175   return NULL;
1176 }
1177
1178 void Shell::OnEvent(ui::Event* event) {
1179 }
1180
1181 ////////////////////////////////////////////////////////////////////////////////
1182 // Shell, aura::client::ActivationChangeObserver implementation:
1183
1184 void Shell::OnWindowActivated(
1185     aura::client::ActivationChangeObserver::ActivationReason reason,
1186     aura::Window* gained_active,
1187     aura::Window* lost_active) {
1188   if (gained_active)
1189     target_root_window_ = gained_active->GetRootWindow();
1190 }
1191
1192 }  // namespace ash