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_controller.h"
  21 #include "ash/display/display_manager.h"
  22 #include "ash/display/event_transformation_handler.h"
  23 #include "ash/display/mouse_cursor_event_filter.h"
  24 #include "ash/display/screen_position_controller.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/keyboard_uma_event_filter.h"
  33 #include "ash/magnifier/magnification_controller.h"
  34 #include "ash/magnifier/partial_magnification_controller.h"
  35 #include "ash/media_delegate.h"
  36 #include "ash/new_window_delegate.h"
  37 #include "ash/root_window_controller.h"
  38 #include "ash/session/session_state_delegate.h"
  39 #include "ash/shelf/app_list_shelf_item_delegate.h"
  40 #include "ash/shelf/shelf_delegate.h"
  41 #include "ash/shelf/shelf_item_delegate.h"
  42 #include "ash/shelf/shelf_item_delegate_manager.h"
  43 #include "ash/shelf/shelf_layout_manager.h"
  44 #include "ash/shelf/shelf_model.h"
  45 #include "ash/shelf/shelf_widget.h"
  46 #include "ash/shelf/shelf_window_watcher.h"
  47 #include "ash/shell_delegate.h"
  48 #include "ash/shell_factory.h"
  49 #include "ash/shell_init_params.h"
  50 #include "ash/shell_window_ids.h"
  51 #include "ash/system/locale/locale_notification_controller.h"
  52 #include "ash/system/status_area_widget.h"
  53 #include "ash/system/tray/system_tray_delegate.h"
  54 #include "ash/system/tray/system_tray_notifier.h"
  55 #include "ash/utility/partial_screenshot_controller.h"
  56 #include "ash/wm/app_list_controller.h"
  57 #include "ash/wm/ash_focus_rules.h"
  58 #include "ash/wm/ash_native_cursor_manager.h"
  59 #include "ash/wm/coordinate_conversion.h"
  60 #include "ash/wm/event_client_impl.h"
  61 #include "ash/wm/lock_state_controller.h"
  62 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
  63 #include "ash/wm/maximize_mode/maximize_mode_window_manager.h"
  64 #include "ash/wm/mru_window_tracker.h"
  65 #include "ash/wm/overlay_event_filter.h"
  66 #include "ash/wm/overview/window_selector_controller.h"
  67 #include "ash/wm/power_button_controller.h"
  68 #include "ash/wm/resize_shadow_controller.h"
  69 #include "ash/wm/root_window_layout_manager.h"
  70 #include "ash/wm/screen_dimmer.h"
  71 #include "ash/wm/system_gesture_event_filter.h"
  72 #include "ash/wm/system_modal_container_event_filter.h"
  73 #include "ash/wm/system_modal_container_layout_manager.h"
  74 #include "ash/wm/toplevel_window_event_handler.h"
  75 #include "ash/wm/video_detector.h"
  76 #include "ash/wm/window_animations.h"
  77 #include "ash/wm/window_cycle_controller.h"
  78 #include "ash/wm/window_positioner.h"
  79 #include "ash/wm/window_properties.h"
  80 #include "ash/wm/window_util.h"
  81 #include "ash/wm/workspace_controller.h"
  82 #include "base/bind.h"
  83 #include "base/trace_event/trace_event.h"
  84 #include "ui/aura/client/aura_constants.h"
  85 #include "ui/aura/env.h"
  86 #include "ui/aura/layout_manager.h"
  87 #include "ui/aura/window.h"
  88 #include "ui/aura/window_event_dispatcher.h"
  89 #include "ui/base/ui_base_switches.h"
  90 #include "ui/base/user_activity/user_activity_detector.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/geometry/size.h"
  96 #include "ui/gfx/image/image_skia.h"
  97 #include "ui/gfx/screen.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/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()->display_controller()->
 226       GetAllRootWindowControllers();
 227 }
 228
 229 // static
 230 aura::Window* Shell::GetPrimaryRootWindow() {
 231   CHECK(HasInstance());
 232   return GetInstance()->display_controller()->GetPrimaryRootWindow();
 233 }
 234
 235 // static
 236 aura::Window* Shell::GetTargetRootWindow() {
 237   CHECK(HasInstance());
 238   Shell* shell = GetInstance();
 239   if (shell->scoped_target_root_window_)
 240     return shell->scoped_target_root_window_;
 241   return shell->target_root_window_;
 242 }
 243
 244 // static
 245 gfx::Screen* Shell::GetScreen() {
 246   return gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_ALTERNATE);
 247 }
 248
 249 // static
 250 aura::Window::Windows Shell::GetAllRootWindows() {
 251   CHECK(HasInstance());
 252   return Shell::GetInstance()->display_controller()->
 253       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 (!display_controller_->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   // TODO(oshima): Allow saving the settings even in unified desktop mode.
 490   return !(screen_orientation_controller_
 491                ->ignore_display_configuration_updates() ||
 492            resolution_notification_controller_->DoesNotificationTimeout()) &&
 493          !switches::UnifiedDesktopEnabled();
 494 }
 495 #endif
 496
 497 void Shell::UpdateShelfVisibility() {
 498   RootWindowControllerList controllers = GetAllRootWindowControllers();
 499   for (RootWindowControllerList::iterator iter = controllers.begin();
 500        iter != controllers.end(); ++iter)
 501     if ((*iter)->shelf())
 502       (*iter)->UpdateShelfVisibility();
 503 }
 504
 505 void Shell::SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior,
 506                                      aura::Window* root_window) {
 507   ash::ShelfLayoutManager::ForShelf(root_window)->SetAutoHideBehavior(behavior);
 508 }
 509
 510 ShelfAutoHideBehavior Shell::GetShelfAutoHideBehavior(
 511     aura::Window* root_window) const {
 512   return ash::ShelfLayoutManager::ForShelf(root_window)->auto_hide_behavior();
 513 }
 514
 515 void Shell::SetShelfAlignment(ShelfAlignment alignment,
 516                               aura::Window* root_window) {
 517   if (ash::ShelfLayoutManager::ForShelf(root_window)->SetAlignment(alignment)) {
 518     FOR_EACH_OBSERVER(
 519         ShellObserver, observers_, OnShelfAlignmentChanged(root_window));
 520   }
 521 }
 522
 523 ShelfAlignment Shell::GetShelfAlignment(const aura::Window* root_window) {
 524   return GetRootWindowController(root_window)
 525       ->GetShelfLayoutManager()
 526       ->GetAlignment();
 527 }
 528
 529 void Shell::SetDimming(bool should_dim) {
 530   RootWindowControllerList controllers = GetAllRootWindowControllers();
 531   for (RootWindowControllerList::iterator iter = controllers.begin();
 532        iter != controllers.end(); ++iter)
 533     (*iter)->screen_dimmer()->SetDimming(should_dim);
 534 }
 535
 536 void Shell::NotifyFullscreenStateChange(bool is_fullscreen,
 537                                         aura::Window* root_window) {
 538   FOR_EACH_OBSERVER(ShellObserver, observers_, OnFullscreenStateChanged(
 539       is_fullscreen, root_window));
 540 }
 541
 542 void Shell::CreateModalBackground(aura::Window* window) {
 543   if (!modality_filter_) {
 544     modality_filter_.reset(new SystemModalContainerEventFilter(this));
 545     AddPreTargetHandler(modality_filter_.get());
 546   }
 547   RootWindowControllerList controllers = GetAllRootWindowControllers();
 548   for (RootWindowControllerList::iterator iter = controllers.begin();
 549        iter != controllers.end(); ++iter)
 550     (*iter)->GetSystemModalLayoutManager(window)->CreateModalBackground();
 551 }
 552
 553 void Shell::OnModalWindowRemoved(aura::Window* removed) {
 554   RootWindowControllerList controllers = GetAllRootWindowControllers();
 555   bool activated = false;
 556   for (RootWindowControllerList::iterator iter = controllers.begin();
 557        iter != controllers.end() && !activated; ++iter) {
 558     activated = (*iter)->GetSystemModalLayoutManager(removed)->
 559         ActivateNextModalWindow();
 560   }
 561   if (!activated) {
 562     RemovePreTargetHandler(modality_filter_.get());
 563     modality_filter_.reset();
 564     for (RootWindowControllerList::iterator iter = controllers.begin();
 565          iter != controllers.end(); ++iter)
 566       (*iter)->GetSystemModalLayoutManager(removed)->DestroyModalBackground();
 567   }
 568 }
 569
 570 WebNotificationTray* Shell::GetWebNotificationTray() {
 571   return GetPrimaryRootWindowController()->shelf()->
 572       status_area_widget()->web_notification_tray();
 573 }
 574
 575 bool Shell::HasPrimaryStatusArea() {
 576   ShelfWidget* shelf = GetPrimaryRootWindowController()->shelf();
 577   return shelf && shelf->status_area_widget();
 578 }
 579
 580 SystemTray* Shell::GetPrimarySystemTray() {
 581   return GetPrimaryRootWindowController()->GetSystemTray();
 582 }
 583
 584 ShelfDelegate* Shell::GetShelfDelegate() {
 585   if (!shelf_delegate_) {
 586     shelf_model_.reset(new ShelfModel);
 587     // Creates ShelfItemDelegateManager before ShelfDelegate.
 588     shelf_item_delegate_manager_.reset(
 589         new ShelfItemDelegateManager(shelf_model_.get()));
 590
 591     shelf_delegate_.reset(delegate_->CreateShelfDelegate(shelf_model_.get()));
 592     scoped_ptr<ShelfItemDelegate> controller(new AppListShelfItemDelegate);
 593
 594     // Finding the shelf model's location of the app list and setting its
 595     // ShelfItemDelegate.
 596     int app_list_index = shelf_model_->GetItemIndexForType(TYPE_APP_LIST);
 597     DCHECK_GE(app_list_index, 0);
 598     ShelfID app_list_id = shelf_model_->items()[app_list_index].id;
 599     DCHECK(app_list_id);
 600     shelf_item_delegate_manager_->SetShelfItemDelegate(app_list_id,
 601                                                        controller.Pass());
 602     shelf_window_watcher_.reset(new ShelfWindowWatcher(
 603         shelf_model_.get(), shelf_item_delegate_manager_.get()));
 604   }
 605   return shelf_delegate_.get();
 606 }
 607
 608 void Shell::SetTouchHudProjectionEnabled(bool enabled) {
 609   if (is_touch_hud_projection_enabled_ == enabled)
 610     return;
 611
 612   is_touch_hud_projection_enabled_ = enabled;
 613   FOR_EACH_OBSERVER(ShellObserver, observers_,
 614                     OnTouchHudProjectionToggled(enabled));
 615 }
 616
 617 #if defined(OS_CHROMEOS)
 618 ash::FirstRunHelper* Shell::CreateFirstRunHelper() {
 619   return new ash::FirstRunHelperImpl;
 620 }
 621
 622 void Shell::SetCursorCompositingEnabled(bool enabled) {
 623   display_controller_->cursor_window_controller()->SetCursorCompositingEnabled(
 624       enabled);
 625   native_cursor_manager_->SetNativeCursorEnabled(!enabled);
 626 }
 627 #endif  // defined(OS_CHROMEOS)
 628
 629 void Shell::DoInitialWorkspaceAnimation() {
 630   return GetPrimaryRootWindowController()->workspace_controller()->
 631       DoInitialAnimation();
 632 }
 633
 634 ////////////////////////////////////////////////////////////////////////////////
 635 // Shell, private:
 636
 637 Shell::Shell(ShellDelegate* delegate)
 638     : target_root_window_(NULL),
 639       scoped_target_root_window_(NULL),
 640       delegate_(delegate),
 641       window_positioner_(new WindowPositioner),
 642       activation_client_(NULL),
 643 #if defined(OS_CHROMEOS)
 644       display_configurator_(new ui::DisplayConfigurator()),
 645 #endif  // defined(OS_CHROMEOS)
 646       native_cursor_manager_(new AshNativeCursorManager),
 647       cursor_manager_(
 648           scoped_ptr<::wm::NativeCursorManager>(native_cursor_manager_)),
 649       simulate_modal_window_open_for_testing_(false),
 650       is_touch_hud_projection_enabled_(false) {
 651   DCHECK(delegate_.get());
 652   gpu_support_.reset(delegate_->CreateGPUSupport());
 653   display_manager_.reset(new DisplayManager);
 654   display_controller_.reset(new DisplayController);
 655   user_metrics_recorder_.reset(new UserMetricsRecorder);
 656
 657 #if defined(OS_CHROMEOS)
 658   PowerStatus::Initialize();
 659 #endif
 660 }
 661
 662 Shell::~Shell() {
 663   TRACE_EVENT0("shutdown", "ash::Shell::Destructor");
 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 #if defined(OS_CHROMEOS)
 678   RemovePreTargetHandler(magnifier_key_scroll_handler_.get());
 679   magnifier_key_scroll_handler_.reset();
 680
 681   RemovePreTargetHandler(speech_feedback_handler_.get());
 682   speech_feedback_handler_.reset();
 683 #endif
 684   RemovePreTargetHandler(overlay_filter_.get());
 685   RemovePreTargetHandler(input_method_filter_.get());
 686   RemovePreTargetHandler(accelerator_filter_.get());
 687   RemovePreTargetHandler(event_transformation_handler_.get());
 688   RemovePreTargetHandler(toplevel_window_event_handler_.get());
 689   RemovePostTargetHandler(toplevel_window_event_handler_.get());
 690   RemovePreTargetHandler(system_gesture_filter_.get());
 691   RemovePreTargetHandler(keyboard_metrics_filter_.get());
 692   RemovePreTargetHandler(mouse_cursor_filter_.get());
 693
 694   // TooltipController is deleted with the Shell so removing its references.
 695   RemovePreTargetHandler(tooltip_controller_.get());
 696
 697 #if defined(OS_CHROMEOS)
 698   screen_orientation_controller_.reset();
 699 #endif
 700
 701 // Destroy the virtual keyboard controller before the maximize mode controller
 702 // since the latters destructor triggers events that the former is listening
 703 // to but no longer cares about.
 704 #if defined(OS_CHROMEOS)
 705   virtual_keyboard_controller_.reset();
 706 #endif
 707
 708   // Destroy maximize mode controller early on since it has some observers which
 709   // need to be removed.
 710   maximize_mode_controller_.reset();
 711
 712   // AppList needs to be released before shelf layout manager, which is
 713   // destroyed with shelf container in the loop below. However, app list
 714   // container is now on top of shelf container and released after it.
 715   // TODO(xiyuan): Move it back when app list container is no longer needed.
 716   app_list_controller_.reset();
 717
 718 #if defined(OS_CHROMEOS)
 719   // Destroy the LastWindowClosedLogoutReminder before the
 720   // LogoutConfirmationController.
 721   last_window_closed_logout_reminder_.reset();
 722
 723   // Destroy the LogoutConfirmationController before the SystemTrayDelegate.
 724   logout_confirmation_controller_.reset();
 725 #endif
 726
 727   // Destroy SystemTrayDelegate before destroying the status area(s).
 728   system_tray_delegate_->Shutdown();
 729   system_tray_delegate_.reset();
 730
 731   locale_notification_controller_.reset();
 732
 733   // Drag-and-drop must be canceled prior to close all windows.
 734   drag_drop_controller_.reset();
 735
 736   // Controllers who have WindowObserver added must be deleted
 737   // before |display_controller_| is deleted.
 738
 739 #if defined(OS_CHROMEOS)
 740   // VideoActivityNotifier must be deleted before |video_detector_| is
 741   // deleted because it's observing video activity through
 742   // VideoDetectorObserver interface.
 743   video_activity_notifier_.reset();
 744 #endif  // defined(OS_CHROMEOS)
 745   video_detector_.reset();
 746   high_contrast_controller_.reset();
 747
 748   shadow_controller_.reset();
 749   resize_shadow_controller_.reset();
 750
 751   window_cycle_controller_.reset();
 752   window_selector_controller_.reset();
 753   mru_window_tracker_.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   display_controller_->CloseChildWindows();
 761
 762   // Chrome implementation of shelf delegate depends on FocusClient,
 763   // so must be deleted before |focus_client_|.
 764   shelf_delegate_.reset();
 765   focus_client_.reset();
 766
 767   // Destroy SystemTrayNotifier after destroying SystemTray as TrayItems
 768   // needs to remove observers from it.
 769   system_tray_notifier_.reset();
 770
 771   // These need a valid Shell instance to clean up properly, so explicitly
 772   // delete them before invalidating the instance.
 773   // Alphabetical. TODO(oshima): sort.
 774   magnification_controller_.reset();
 775   partial_magnification_controller_.reset();
 776   tooltip_controller_.reset();
 777   event_client_.reset();
 778   nested_accelerator_controller_.reset();
 779   toplevel_window_event_handler_.reset();
 780   visibility_controller_.reset();
 781   // |shelf_item_delegate_manager_| observes |shelf_model_|. It must be
 782   // destroyed before |shelf_model_| is destroyed.
 783   shelf_item_delegate_manager_.reset();
 784   shelf_model_.reset();
 785
 786   power_button_controller_.reset();
 787   lock_state_controller_.reset();
 788
 789 #if defined(OS_CHROMEOS)
 790   resolution_notification_controller_.reset();
 791 #endif
 792   desktop_background_controller_.reset();
 793   partial_screenshot_controller_.reset();
 794   mouse_cursor_filter_.reset();
 795
 796 #if defined(OS_CHROMEOS)
 797   touch_transformer_controller_.reset();
 798 #endif  // defined(OS_CHROMEOS)
 799
 800   // This also deletes all RootWindows. Note that we invoke Shutdown() on
 801   // DisplayController before resetting |display_controller_|, since destruction
 802   // of its owned RootWindowControllers relies on the value.
 803   display_manager_->CreateScreenForShutdown();
 804   display_controller_->Shutdown();
 805   display_controller_.reset();
 806   screen_position_controller_.reset();
 807   accessibility_delegate_.reset();
 808   new_window_delegate_.reset();
 809   media_delegate_.reset();
 810
 811   keyboard::KeyboardController::ResetInstance(NULL);
 812
 813 #if defined(OS_CHROMEOS)
 814   display_color_manager_.reset();
 815   if (display_change_observer_)
 816     display_configurator_->RemoveObserver(display_change_observer_.get());
 817   if (display_configurator_animation_)
 818     display_configurator_->RemoveObserver(
 819         display_configurator_animation_.get());
 820   if (display_error_observer_)
 821     display_configurator_->RemoveObserver(display_error_observer_.get());
 822   if (projecting_observer_) {
 823     display_configurator_->RemoveObserver(projecting_observer_.get());
 824     RemoveShellObserver(projecting_observer_.get());
 825   }
 826   display_change_observer_.reset();
 827
 828   PowerStatus::Shutdown();
 829
 830   // Ensure that DBusThreadManager outlives this Shell.
 831   DCHECK(chromeos::DBusThreadManager::IsInitialized());
 832 #endif
 833
 834   DCHECK(instance_ == this);
 835   instance_ = NULL;
 836 }
 837
 838 void Shell::Init(const ShellInitParams& init_params) {
 839   delegate_->PreInit();
 840   bool display_initialized = display_manager_->InitFromCommandLine();
 841 #if defined(OS_CHROMEOS)
 842   display_configurator_->Init(!gpu_support_->IsPanelFittingDisabled());
 843   display_configurator_animation_.reset(new DisplayConfiguratorAnimation());
 844   display_configurator_->AddObserver(display_configurator_animation_.get());
 845
 846   // The DBusThreadManager must outlive this Shell. See the DCHECK in ~Shell.
 847   chromeos::DBusThreadManager* dbus_thread_manager =
 848       chromeos::DBusThreadManager::Get();
 849   projecting_observer_.reset(
 850       new ProjectingObserver(dbus_thread_manager->GetPowerManagerClient()));
 851   display_configurator_->AddObserver(projecting_observer_.get());
 852   AddShellObserver(projecting_observer_.get());
 853
 854   if (!display_initialized && base::SysInfo::IsRunningOnChromeOS()) {
 855     display_change_observer_.reset(new DisplayChangeObserver);
 856     // Register |display_change_observer_| first so that the rest of
 857     // observer gets invoked after the root windows are configured.
 858     display_configurator_->AddObserver(display_change_observer_.get());
 859     display_error_observer_.reset(new DisplayErrorObserver());
 860     display_configurator_->AddObserver(display_error_observer_.get());
 861     display_configurator_->set_state_controller(display_change_observer_.get());
 862     display_configurator_->set_mirroring_controller(display_manager_.get());
 863     display_configurator_->ForceInitialConfigure(
 864         delegate_->IsFirstRunAfterBoot() ? kChromeOsBootColor : 0);
 865     display_initialized = true;
 866   }
 867   display_color_manager_.reset(
 868       new DisplayColorManager(display_configurator_.get()));
 869 #endif  // defined(OS_CHROMEOS)
 870   if (!display_initialized)
 871     display_manager_->InitDefaultDisplay();
 872
 873   display_manager_->RefreshFontParams();
 874
 875   // Install the custom factory first so that views::FocusManagers for Tray,
 876   // Shelf, and WallPaper could be created by the factory.
 877   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
 878
 879   aura::Env::CreateInstance(true);
 880   aura::Env::GetInstance()->set_context_factory(init_params.context_factory);
 881
 882   // The WindowModalityController needs to be at the front of the input event
 883   // pretarget handler list to ensure that it processes input events when modal
 884   // windows are active.
 885   window_modality_controller_.reset(
 886       new ::wm::WindowModalityController(this));
 887
 888   env_filter_.reset(new ::wm::CompoundEventFilter);
 889   AddPreTargetHandler(env_filter_.get());
 890
 891   wm::AshFocusRules* focus_rules = new wm::AshFocusRules();
 892
 893   ::wm::FocusController* focus_controller =
 894       new ::wm::FocusController(focus_rules);
 895   focus_client_.reset(focus_controller);
 896   activation_client_ = focus_controller;
 897   activation_client_->AddObserver(this);
 898   focus_cycler_.reset(new FocusCycler());
 899
 900   screen_position_controller_.reset(new ScreenPositionController);
 901
 902   display_controller_->Start();
 903   display_controller_->CreatePrimaryHost(
 904       ShellInitParamsToAshWindowTreeHostInitParams(init_params));
 905   aura::Window* root_window = display_controller_->GetPrimaryRootWindow();
 906   target_root_window_ = root_window;
 907
 908 #if defined(OS_CHROMEOS)
 909   resolution_notification_controller_.reset(
 910       new ResolutionNotificationController);
 911 #endif
 912
 913   cursor_manager_.SetDisplay(GetScreen()->GetPrimaryDisplay());
 914
 915   nested_accelerator_controller_.reset(
 916       new ::wm::NestedAcceleratorController(new NestedAcceleratorDelegate));
 917   accelerator_controller_.reset(new AcceleratorController);
 918   maximize_mode_controller_.reset(new MaximizeModeController());
 919
 920 #if defined(OS_CHROMEOS)
 921   magnifier_key_scroll_handler_ = MagnifierKeyScroller::CreateHandler();
 922   AddPreTargetHandler(magnifier_key_scroll_handler_.get());
 923   speech_feedback_handler_ = SpokenFeedbackToggler::CreateHandler();
 924   AddPreTargetHandler(speech_feedback_handler_.get());
 925 #endif
 926
 927   // The order in which event filters are added is significant.
 928
 929   // ui::UserActivityDetector passes events to observers, so let them get
 930   // rewritten first.
 931   user_activity_detector_.reset(new ui::UserActivityDetector);
 932
 933   overlay_filter_.reset(new OverlayEventFilter);
 934   AddPreTargetHandler(overlay_filter_.get());
 935   AddShellObserver(overlay_filter_.get());
 936
 937   input_method_filter_.reset(new ::wm::InputMethodEventFilter(
 938       root_window->GetHost()->GetAcceleratedWidget()));
 939   AddPreTargetHandler(input_method_filter_.get());
 940
 941   accelerator_filter_.reset(new ::wm::AcceleratorFilter(
 942       scoped_ptr< ::wm::AcceleratorDelegate>(new AcceleratorDelegate).Pass(),
 943       accelerator_controller_->accelerator_history()));
 944   AddPreTargetHandler(accelerator_filter_.get());
 945
 946   event_transformation_handler_.reset(new EventTransformationHandler);
 947   AddPreTargetHandler(event_transformation_handler_.get());
 948
 949   toplevel_window_event_handler_.reset(new ToplevelWindowEventHandler);
 950
 951   system_gesture_filter_.reset(new SystemGestureEventFilter);
 952   AddPreTargetHandler(system_gesture_filter_.get());
 953
 954   keyboard_metrics_filter_.reset(new KeyboardUMAEventFilter);
 955   AddPreTargetHandler(keyboard_metrics_filter_.get());
 956
 957   // The keyboard system must be initialized before the RootWindowController is
 958   // created.
 959 #if defined(OS_CHROMEOS)
 960     keyboard::InitializeKeyboard();
 961 #endif
 962
 963 #if defined(OS_CHROMEOS)
 964   sticky_keys_controller_.reset(new StickyKeysController);
 965 #endif
 966
 967   lock_state_controller_.reset(new LockStateController);
 968   power_button_controller_.reset(new PowerButtonController(
 969       lock_state_controller_.get()));
 970 #if defined(OS_CHROMEOS)
 971   // Pass the initial display state to PowerButtonController.
 972   power_button_controller_->OnDisplayModeChanged(
 973       display_configurator_->cached_displays());
 974 #endif
 975   AddShellObserver(lock_state_controller_.get());
 976
 977   drag_drop_controller_.reset(new DragDropController);
 978   // |partial_screenshot_controller_| needs to be created (and prepended as a
 979   // pre-target handler) at this point, because |mouse_cursor_filter_| needs to
 980   // process mouse events prior to partial screenshot session.
 981   // See http://crbug.com/459214
 982   partial_screenshot_controller_.reset(new PartialScreenshotController());
 983   mouse_cursor_filter_.reset(new MouseCursorEventFilter());
 984   PrependPreTargetHandler(mouse_cursor_filter_.get());
 985
 986   // Create Controllers that may need root window.
 987   // TODO(oshima): Move as many controllers before creating
 988   // RootWindowController as possible.
 989   visibility_controller_.reset(new AshVisibilityController);
 990
 991   magnification_controller_.reset(
 992       MagnificationController::CreateInstance());
 993   mru_window_tracker_.reset(new MruWindowTracker(activation_client_,
 994                                                  focus_rules));
 995
 996   partial_magnification_controller_.reset(
 997       new PartialMagnificationController());
 998
 999   autoclick_controller_.reset(AutoclickController::CreateInstance());
1000
1001   high_contrast_controller_.reset(new HighContrastController);
1002   video_detector_.reset(new VideoDetector);
1003   window_selector_controller_.reset(new WindowSelectorController());
1004   window_cycle_controller_.reset(new WindowCycleController());
1005
1006   tooltip_controller_.reset(new views::corewm::TooltipController(
1007       scoped_ptr<views::corewm::Tooltip>(new views::corewm::TooltipAura)));
1008   AddPreTargetHandler(tooltip_controller_.get());
1009
1010   event_client_.reset(new EventClientImpl);
1011
1012   // This controller needs to be set before SetupManagedWindowMode.
1013   desktop_background_controller_.reset(new DesktopBackgroundController());
1014   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
1015
1016   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
1017   accessibility_delegate_.reset(delegate_->CreateAccessibilityDelegate());
1018   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
1019   media_delegate_.reset(delegate_->CreateMediaDelegate());
1020
1021   resize_shadow_controller_.reset(new ResizeShadowController());
1022   shadow_controller_.reset(
1023       new ::wm::ShadowController(activation_client_));
1024
1025   // Create system_tray_notifier_ before the delegate.
1026   system_tray_notifier_.reset(new ash::SystemTrayNotifier());
1027
1028   // Initialize system_tray_delegate_ before initializing StatusAreaWidget.
1029   system_tray_delegate_.reset(delegate()->CreateSystemTrayDelegate());
1030   DCHECK(system_tray_delegate_.get());
1031
1032   locale_notification_controller_.reset(new LocaleNotificationController);
1033
1034   // Initialize system_tray_delegate_ after StatusAreaWidget is created.
1035   system_tray_delegate_->Initialize();
1036
1037 #if defined(OS_CHROMEOS)
1038   // Create the LogoutConfirmationController after the SystemTrayDelegate.
1039   logout_confirmation_controller_.reset(new LogoutConfirmationController(
1040       base::Bind(&SystemTrayDelegate::SignOut,
1041                  base::Unretained(system_tray_delegate_.get()))));
1042
1043   // Create TouchTransformerController before DisplayController::InitDisplays()
1044   // since TouchTransformerController listens on
1045   // DisplayController::Observer::OnDisplaysInitialized().
1046   touch_transformer_controller_.reset(new TouchTransformerController());
1047 #endif  // defined(OS_CHROMEOS)
1048
1049   display_controller_->InitDisplays();
1050
1051 #if defined(OS_CHROMEOS)
1052   // Needs to be created after InitDisplays() since it may cause the virtual
1053   // keyboard to be deployed.
1054   virtual_keyboard_controller_.reset(new VirtualKeyboardController);
1055 #endif  // defined(OS_CHROMEOS)
1056
1057   // It needs to be created after RootWindowController has been created
1058   // (which calls OnWindowResized has been called, otherwise the
1059   // widget will not paint when restoring after a browser crash.  Also it needs
1060   // to be created after InitSecondaryDisplays() to initialize the wallpapers in
1061   // the correct size.
1062   user_wallpaper_delegate_->InitializeWallpaper();
1063
1064   if (initially_hide_cursor_)
1065     cursor_manager_.HideCursor();
1066   cursor_manager_.SetCursor(ui::kCursorPointer);
1067
1068 #if defined(OS_CHROMEOS)
1069   // Set accelerator controller delegates.
1070   accelerator_controller_->SetBrightnessControlDelegate(
1071       scoped_ptr<ash::BrightnessControlDelegate>(
1072           new ash::system::BrightnessControllerChromeos).Pass());
1073
1074   power_event_observer_.reset(new PowerEventObserver());
1075   user_activity_notifier_.reset(
1076       new ui::UserActivityPowerManagerNotifier(user_activity_detector_.get()));
1077   video_activity_notifier_.reset(
1078       new VideoActivityNotifier(video_detector_.get()));
1079   bluetooth_notification_controller_.reset(new BluetoothNotificationController);
1080   last_window_closed_logout_reminder_.reset(new LastWindowClosedLogoutReminder);
1081   screen_orientation_controller_.reset(new ScreenOrientationController());
1082 #endif
1083   // The compositor thread and main message loop have to be running in
1084   // order to create mirror window. Run it after the main message loop
1085   // is started.
1086   display_manager_->CreateMirrorWindowAsyncIfAny();
1087 }
1088
1089 void Shell::InitKeyboard() {
1090   if (keyboard::IsKeyboardEnabled()) {
1091     if (keyboard::KeyboardController::GetInstance()) {
1092       RootWindowControllerList controllers = GetAllRootWindowControllers();
1093       for (RootWindowControllerList::iterator iter = controllers.begin();
1094            iter != controllers.end(); ++iter) {
1095         (*iter)->DeactivateKeyboard(
1096             keyboard::KeyboardController::GetInstance());
1097       }
1098     }
1099     keyboard::KeyboardControllerProxy* proxy =
1100         delegate_->CreateKeyboardControllerProxy();
1101     keyboard::KeyboardController::ResetInstance(
1102         new keyboard::KeyboardController(proxy));
1103   }
1104 }
1105
1106 void Shell::InitRootWindow(aura::Window* root_window) {
1107   DCHECK(activation_client_);
1108   DCHECK(visibility_controller_.get());
1109   DCHECK(drag_drop_controller_.get());
1110
1111   aura::client::SetFocusClient(root_window, focus_client_.get());
1112   input_method_filter_->SetInputMethodPropertyInRootWindow(root_window);
1113   aura::client::SetActivationClient(root_window, activation_client_);
1114   ::wm::FocusController* focus_controller =
1115       static_cast< ::wm::FocusController*>(activation_client_);
1116   root_window->AddPreTargetHandler(focus_controller);
1117   aura::client::SetVisibilityClient(root_window, visibility_controller_.get());
1118   aura::client::SetDragDropClient(root_window, drag_drop_controller_.get());
1119   aura::client::SetScreenPositionClient(root_window,
1120                                         screen_position_controller_.get());
1121   aura::client::SetCursorClient(root_window, &cursor_manager_);
1122   aura::client::SetTooltipClient(root_window, tooltip_controller_.get());
1123   aura::client::SetEventClient(root_window, event_client_.get());
1124
1125   aura::client::SetWindowMoveClient(root_window,
1126       toplevel_window_event_handler_.get());
1127   root_window->AddPreTargetHandler(toplevel_window_event_handler_.get());
1128   root_window->AddPostTargetHandler(toplevel_window_event_handler_.get());
1129
1130   if (nested_accelerator_controller_) {
1131     aura::client::SetDispatcherClient(root_window,
1132                                       nested_accelerator_controller_.get());
1133   }
1134 }
1135
1136 bool Shell::CanWindowReceiveEvents(aura::Window* window) {
1137   RootWindowControllerList controllers = GetAllRootWindowControllers();
1138   for (RootWindowControllerList::iterator iter = controllers.begin();
1139        iter != controllers.end(); ++iter) {
1140     SystemModalContainerLayoutManager* layout_manager =
1141         (*iter)->GetSystemModalLayoutManager(window);
1142     if (layout_manager && layout_manager->CanWindowReceiveEvents(window))
1143       return true;
1144     // Allow events to fall through to the virtual keyboard even if displaying
1145     // a system modal dialog.
1146     if ((*iter)->IsVirtualKeyboardWindow(window))
1147       return true;
1148   }
1149
1150   return false;
1151 }
1152
1153 ////////////////////////////////////////////////////////////////////////////////
1154 // Shell, ui::EventTarget overrides:
1155
1156 bool Shell::CanAcceptEvent(const ui::Event& event) {
1157   return true;
1158 }
1159
1160 ui::EventTarget* Shell::GetParentTarget() {
1161   return aura::Env::GetInstance();
1162 }
1163
1164 scoped_ptr<ui::EventTargetIterator> Shell::GetChildIterator() const {
1165   return scoped_ptr<ui::EventTargetIterator>();
1166 }
1167
1168 ui::EventTargeter* Shell::GetEventTargeter() {
1169   NOTREACHED();
1170   return NULL;
1171 }
1172
1173 void Shell::OnEvent(ui::Event* event) {
1174 }
1175
1176 ////////////////////////////////////////////////////////////////////////////////
1177 // Shell, aura::client::ActivationChangeObserver implementation:
1178
1179 void Shell::OnWindowActivated(aura::Window* gained_active,
1180                               aura::Window* lost_active) {
1181   if (gained_active)
1182     target_root_window_ = gained_active->GetRootWindow();
1183 }
1184
1185 }  // namespace ash