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_ = nullptr;
 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_ = nullptr;
 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()
 333                                     : nullptr;
 334 }
 335
 336 app_list::AppListView* Shell::GetAppListView() {
 337   return app_list_controller_.get() ? app_list_controller_->GetView() : nullptr;
 338 }
 339
 340 bool Shell::IsSystemModalWindowOpen() const {
 341   if (simulate_modal_window_open_for_testing_)
 342     return true;
 343   const std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 344       kShellWindowId_SystemModalContainer, nullptr);
 345   for (std::vector<aura::Window*>::const_iterator cit = containers.begin();
 346        cit != containers.end(); ++cit) {
 347     for (aura::Window::Windows::const_iterator wit = (*cit)->children().begin();
 348          wit != (*cit)->children().end(); ++wit) {
 349       if ((*wit)->GetProperty(aura::client::kModalKey) ==
 350           ui::MODAL_TYPE_SYSTEM && (*wit)->TargetVisibility()) {
 351         return true;
 352       }
 353     }
 354   }
 355   return false;
 356 }
 357
 358 views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
 359     views::Widget* widget) {
 360   // Use translucent-style window frames for dialogs.
 361   return new CustomFrameViewAsh(widget);
 362 }
 363
 364 void Shell::RotateFocus(Direction direction) {
 365   focus_cycler_->RotateFocus(direction == FORWARD ? FocusCycler::FORWARD
 366                                                   : FocusCycler::BACKWARD);
 367 }
 368
 369 void Shell::SetDisplayWorkAreaInsets(Window* contains,
 370                                      const gfx::Insets& insets) {
 371   if (!window_tree_host_manager_->UpdateWorkAreaOfDisplayNearestWindow(
 372           contains, insets)) {
 373     return;
 374   }
 375   FOR_EACH_OBSERVER(ShellObserver, observers_,
 376                     OnDisplayWorkAreaInsetsChanged());
 377 }
 378
 379 void Shell::OnLoginStateChanged(user::LoginStatus status) {
 380   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLoginStateChanged(status));
 381 }
 382
 383 void Shell::OnLoginUserProfilePrepared() {
 384   CreateShelf();
 385   CreateKeyboard();
 386 }
 387
 388 void Shell::UpdateAfterLoginStatusChange(user::LoginStatus status) {
 389   RootWindowControllerList controllers = GetAllRootWindowControllers();
 390   for (RootWindowControllerList::iterator iter = controllers.begin();
 391        iter != controllers.end(); ++iter)
 392     (*iter)->UpdateAfterLoginStatusChange(status);
 393 }
 394
 395 void Shell::OnAppTerminating() {
 396   FOR_EACH_OBSERVER(ShellObserver, observers_, OnAppTerminating());
 397 }
 398
 399 void Shell::OnLockStateChanged(bool locked) {
 400   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLockStateChanged(locked));
 401 #ifndef NDEBUG
 402   // Make sure that there is no system modal in Lock layer when unlocked.
 403   if (!locked) {
 404     std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 405         kShellWindowId_LockSystemModalContainer, GetPrimaryRootWindow());
 406     for (std::vector<aura::Window*>::const_iterator iter = containers.begin();
 407          iter != containers.end(); ++iter) {
 408       DCHECK_EQ(0u, (*iter)->children().size());
 409     }
 410   }
 411 #endif
 412 }
 413
 414 void Shell::OnCastingSessionStartedOrStopped(bool started) {
 415 #if defined(OS_CHROMEOS)
 416   FOR_EACH_OBSERVER(ShellObserver, observers_,
 417                     OnCastingSessionStartedOrStopped(started));
 418 #endif
 419 }
 420
 421 void Shell::OnOverviewModeStarting() {
 422   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeStarting());
 423 }
 424
 425 void Shell::OnOverviewModeEnded() {
 426   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeEnded());
 427 }
 428
 429 void Shell::OnMaximizeModeStarted() {
 430   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeStarted());
 431 }
 432
 433 void Shell::OnMaximizeModeEnded() {
 434   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeEnded());
 435 }
 436
 437 void Shell::OnRootWindowAdded(aura::Window* root_window) {
 438   FOR_EACH_OBSERVER(ShellObserver, observers_, OnRootWindowAdded(root_window));
 439 }
 440
 441 void Shell::CreateShelf() {
 442   RootWindowControllerList controllers = GetAllRootWindowControllers();
 443   for (RootWindowControllerList::iterator iter = controllers.begin();
 444        iter != controllers.end(); ++iter)
 445     (*iter)->shelf()->CreateShelf();
 446 }
 447
 448 void Shell::OnShelfCreatedForRootWindow(aura::Window* root_window) {
 449   FOR_EACH_OBSERVER(ShellObserver,
 450                     observers_,
 451                     OnShelfCreatedForRootWindow(root_window));
 452 }
 453
 454 void Shell::CreateKeyboard() {
 455   // TODO(bshe): Primary root window controller may not be the controller to
 456   // attach virtual keyboard. See http://crbug.com/303429
 457   InitKeyboard();
 458   GetPrimaryRootWindowController()->
 459       ActivateKeyboard(keyboard::KeyboardController::GetInstance());
 460 }
 461
 462 void Shell::DeactivateKeyboard() {
 463   if (keyboard::KeyboardController::GetInstance()) {
 464     RootWindowControllerList controllers = GetAllRootWindowControllers();
 465     for (RootWindowControllerList::iterator iter = controllers.begin();
 466         iter != controllers.end(); ++iter) {
 467       (*iter)->DeactivateKeyboard(keyboard::KeyboardController::GetInstance());
 468     }
 469   }
 470   keyboard::KeyboardController::ResetInstance(nullptr);
 471 }
 472
 473 void Shell::ShowShelf() {
 474   RootWindowControllerList controllers = GetAllRootWindowControllers();
 475   for (RootWindowControllerList::iterator iter = controllers.begin();
 476        iter != controllers.end(); ++iter)
 477     (*iter)->ShowShelf();
 478 }
 479
 480 void Shell::AddShellObserver(ShellObserver* observer) {
 481   observers_.AddObserver(observer);
 482 }
 483
 484 void Shell::RemoveShellObserver(ShellObserver* observer) {
 485   observers_.RemoveObserver(observer);
 486 }
 487
 488 #if defined(OS_CHROMEOS)
 489 bool Shell::ShouldSaveDisplaySettings() {
 490   return !(screen_orientation_controller_
 491                ->ignore_display_configuration_updates() ||
 492            resolution_notification_controller_->DoesNotificationTimeout());
 493 }
 494 #endif
 495
 496 void Shell::UpdateShelfVisibility() {
 497   RootWindowControllerList controllers = GetAllRootWindowControllers();
 498   for (RootWindowControllerList::iterator iter = controllers.begin();
 499        iter != controllers.end(); ++iter)
 500     if ((*iter)->shelf())
 501       (*iter)->UpdateShelfVisibility();
 502 }
 503
 504 void Shell::SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior,
 505                                      aura::Window* root_window) {
 506   ash::ShelfLayoutManager::ForShelf(root_window)->SetAutoHideBehavior(behavior);
 507 }
 508
 509 ShelfAutoHideBehavior Shell::GetShelfAutoHideBehavior(
 510     aura::Window* root_window) const {
 511   return ash::ShelfLayoutManager::ForShelf(root_window)->auto_hide_behavior();
 512 }
 513
 514 void Shell::SetShelfAlignment(ShelfAlignment alignment,
 515                               aura::Window* root_window) {
 516   if (ash::ShelfLayoutManager::ForShelf(root_window)->SetAlignment(alignment)) {
 517     FOR_EACH_OBSERVER(
 518         ShellObserver, observers_, OnShelfAlignmentChanged(root_window));
 519   }
 520 }
 521
 522 ShelfAlignment Shell::GetShelfAlignment(const aura::Window* root_window) {
 523   return GetRootWindowController(root_window)
 524       ->GetShelfLayoutManager()
 525       ->GetAlignment();
 526 }
 527
 528 void Shell::SetDimming(bool should_dim) {
 529   RootWindowControllerList controllers = GetAllRootWindowControllers();
 530   for (RootWindowControllerList::iterator iter = controllers.begin();
 531        iter != controllers.end(); ++iter)
 532     (*iter)->screen_dimmer()->SetDimming(should_dim);
 533 }
 534
 535 void Shell::NotifyFullscreenStateChange(bool is_fullscreen,
 536                                         aura::Window* root_window) {
 537   FOR_EACH_OBSERVER(ShellObserver, observers_, OnFullscreenStateChanged(
 538       is_fullscreen, root_window));
 539 }
 540
 541 void Shell::CreateModalBackground(aura::Window* window) {
 542   if (!modality_filter_) {
 543     modality_filter_.reset(new SystemModalContainerEventFilter(this));
 544     AddPreTargetHandler(modality_filter_.get());
 545   }
 546   RootWindowControllerList controllers = GetAllRootWindowControllers();
 547   for (RootWindowControllerList::iterator iter = controllers.begin();
 548        iter != controllers.end(); ++iter)
 549     (*iter)->GetSystemModalLayoutManager(window)->CreateModalBackground();
 550 }
 551
 552 void Shell::OnModalWindowRemoved(aura::Window* removed) {
 553   RootWindowControllerList controllers = GetAllRootWindowControllers();
 554   bool activated = false;
 555   for (RootWindowControllerList::iterator iter = controllers.begin();
 556        iter != controllers.end() && !activated; ++iter) {
 557     activated = (*iter)->GetSystemModalLayoutManager(removed)->
 558         ActivateNextModalWindow();
 559   }
 560   if (!activated) {
 561     RemovePreTargetHandler(modality_filter_.get());
 562     modality_filter_.reset();
 563     for (RootWindowControllerList::iterator iter = controllers.begin();
 564          iter != controllers.end(); ++iter)
 565       (*iter)->GetSystemModalLayoutManager(removed)->DestroyModalBackground();
 566   }
 567 }
 568
 569 WebNotificationTray* Shell::GetWebNotificationTray() {
 570   return GetPrimaryRootWindowController()->shelf()->
 571       status_area_widget()->web_notification_tray();
 572 }
 573
 574 bool Shell::HasPrimaryStatusArea() {
 575   ShelfWidget* shelf = GetPrimaryRootWindowController()->shelf();
 576   return shelf && shelf->status_area_widget();
 577 }
 578
 579 SystemTray* Shell::GetPrimarySystemTray() {
 580   return GetPrimaryRootWindowController()->GetSystemTray();
 581 }
 582
 583 ShelfDelegate* Shell::GetShelfDelegate() {
 584   if (!shelf_delegate_) {
 585     shelf_model_.reset(new ShelfModel);
 586     // Creates ShelfItemDelegateManager before ShelfDelegate.
 587     shelf_item_delegate_manager_.reset(
 588         new ShelfItemDelegateManager(shelf_model_.get()));
 589
 590     shelf_delegate_.reset(delegate_->CreateShelfDelegate(shelf_model_.get()));
 591     scoped_ptr<ShelfItemDelegate> controller(new AppListShelfItemDelegate);
 592
 593     // Finding the shelf model's location of the app list and setting its
 594     // ShelfItemDelegate.
 595     int app_list_index = shelf_model_->GetItemIndexForType(TYPE_APP_LIST);
 596     DCHECK_GE(app_list_index, 0);
 597     ShelfID app_list_id = shelf_model_->items()[app_list_index].id;
 598     DCHECK(app_list_id);
 599     shelf_item_delegate_manager_->SetShelfItemDelegate(app_list_id,
 600                                                        controller.Pass());
 601     shelf_window_watcher_.reset(new ShelfWindowWatcher(
 602         shelf_model_.get(), shelf_item_delegate_manager_.get()));
 603   }
 604   return shelf_delegate_.get();
 605 }
 606
 607 void Shell::SetTouchHudProjectionEnabled(bool enabled) {
 608   if (is_touch_hud_projection_enabled_ == enabled)
 609     return;
 610
 611   is_touch_hud_projection_enabled_ = enabled;
 612   FOR_EACH_OBSERVER(ShellObserver, observers_,
 613                     OnTouchHudProjectionToggled(enabled));
 614 }
 615
 616 #if defined(OS_CHROMEOS)
 617 ash::FirstRunHelper* Shell::CreateFirstRunHelper() {
 618   return new ash::FirstRunHelperImpl;
 619 }
 620
 621 void Shell::SetCursorCompositingEnabled(bool enabled) {
 622   window_tree_host_manager_->cursor_window_controller()
 623       ->SetCursorCompositingEnabled(enabled);
 624   native_cursor_manager_->SetNativeCursorEnabled(!enabled);
 625 }
 626 #endif  // defined(OS_CHROMEOS)
 627
 628 void Shell::DoInitialWorkspaceAnimation() {
 629   return GetPrimaryRootWindowController()->workspace_controller()->
 630       DoInitialAnimation();
 631 }
 632
 633 ////////////////////////////////////////////////////////////////////////////////
 634 // Shell, private:
 635
 636 Shell::Shell(ShellDelegate* delegate)
 637     : target_root_window_(nullptr),
 638       scoped_target_root_window_(nullptr),
 639       delegate_(delegate),
 640       window_positioner_(new WindowPositioner),
 641       activation_client_(nullptr),
 642 #if defined(OS_CHROMEOS)
 643       display_configurator_(new ui::DisplayConfigurator()),
 644 #endif  // defined(OS_CHROMEOS)
 645       native_cursor_manager_(new AshNativeCursorManager),
 646       cursor_manager_(
 647           scoped_ptr<::wm::NativeCursorManager>(native_cursor_manager_)),
 648       simulate_modal_window_open_for_testing_(false),
 649       is_touch_hud_projection_enabled_(false) {
 650   DCHECK(delegate_.get());
 651   DCHECK(aura::Env::GetInstanceDontCreate());
 652   gpu_support_.reset(delegate_->CreateGPUSupport());
 653   display_manager_.reset(new DisplayManager);
 654   window_tree_host_manager_.reset(new WindowTreeHostManager);
 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   user_metrics_recorder_->OnShellShuttingDown();
 666
 667   delegate_->PreShutdown();
 668
 669   views::FocusManagerFactory::Install(nullptr);
 670
 671   // Remove the focus from any window. This will prevent overhead and side
 672   // effects (e.g. crashes) from changing focus during shutdown.
 673   // See bug crbug.com/134502.
 674   aura::client::GetFocusClient(GetPrimaryRootWindow())->FocusWindow(nullptr);
 675
 676   // Please keep in same order as in Init() because it's easy to miss one.
 677   if (window_modality_controller_)
 678     window_modality_controller_.reset();
 679   RemovePreTargetHandler(
 680       window_tree_host_manager_->input_method_event_handler());
 681 #if defined(OS_CHROMEOS)
 682   RemovePreTargetHandler(magnifier_key_scroll_handler_.get());
 683   magnifier_key_scroll_handler_.reset();
 684
 685   RemovePreTargetHandler(speech_feedback_handler_.get());
 686   speech_feedback_handler_.reset();
 687 #endif
 688   RemovePreTargetHandler(overlay_filter_.get());
 689   RemovePreTargetHandler(accelerator_filter_.get());
 690   RemovePreTargetHandler(event_transformation_handler_.get());
 691   RemovePreTargetHandler(toplevel_window_event_handler_.get());
 692   RemovePostTargetHandler(toplevel_window_event_handler_.get());
 693   RemovePreTargetHandler(system_gesture_filter_.get());
 694   RemovePreTargetHandler(keyboard_metrics_filter_.get());
 695   RemovePreTargetHandler(mouse_cursor_filter_.get());
 696
 697   // TooltipController is deleted with the Shell so removing its references.
 698   RemovePreTargetHandler(tooltip_controller_.get());
 699
 700 #if defined(OS_CHROMEOS)
 701   screen_orientation_controller_.reset();
 702 #endif
 703
 704 // Destroy the virtual keyboard controller before the maximize mode controller
 705 // since the latters destructor triggers events that the former is listening
 706 // to but no longer cares about.
 707 #if defined(OS_CHROMEOS)
 708   virtual_keyboard_controller_.reset();
 709 #endif
 710
 711   // Destroy maximize mode controller early on since it has some observers which
 712   // need to be removed.
 713   maximize_mode_controller_.reset();
 714
 715   // AppList needs to be released before shelf layout manager, which is
 716   // destroyed with shelf container in the loop below. However, app list
 717   // container is now on top of shelf container and released after it.
 718   // TODO(xiyuan): Move it back when app list container is no longer needed.
 719   app_list_controller_.reset();
 720
 721 #if defined(OS_CHROMEOS)
 722   // Destroy the LastWindowClosedLogoutReminder before the
 723   // LogoutConfirmationController.
 724   last_window_closed_logout_reminder_.reset();
 725
 726   // Destroy the LogoutConfirmationController before the SystemTrayDelegate.
 727   logout_confirmation_controller_.reset();
 728 #endif
 729
 730   // Destroy SystemTrayDelegate before destroying the status area(s).
 731   system_tray_delegate_->Shutdown();
 732   system_tray_delegate_.reset();
 733
 734   locale_notification_controller_.reset();
 735
 736   // Drag-and-drop must be canceled prior to close all windows.
 737   drag_drop_controller_.reset();
 738
 739   // Controllers who have WindowObserver added must be deleted
 740   // before |window_tree_host_manager_| is deleted.
 741
 742 #if defined(OS_CHROMEOS)
 743   // VideoActivityNotifier must be deleted before |video_detector_| is
 744   // deleted because it's observing video activity through
 745   // VideoDetectorObserver interface.
 746   video_activity_notifier_.reset();
 747 #endif  // defined(OS_CHROMEOS)
 748   video_detector_.reset();
 749   high_contrast_controller_.reset();
 750
 751   shadow_controller_.reset();
 752   resize_shadow_controller_.reset();
 753
 754   window_cycle_controller_.reset();
 755   window_selector_controller_.reset();
 756
 757   // |shelf_window_watcher_| has a weak pointer to |shelf_Model_|
 758   // and has window observers.
 759   shelf_window_watcher_.reset();
 760
 761   // Destroy all child windows including widgets.
 762   window_tree_host_manager_->CloseChildWindows();
 763   // MruWindowTracker must be destroyed after all windows have been deleted to
 764   // avoid a possible crash when Shell is destroyed from a non-normal shutdown
 765   // path. (crbug.com/485438).
 766   mru_window_tracker_.reset();
 767
 768   // Chrome implementation of shelf delegate depends on FocusClient,
 769   // so must be deleted before |focus_client_|.
 770   shelf_delegate_.reset();
 771   focus_client_.reset();
 772
 773   // Destroy SystemTrayNotifier after destroying SystemTray as TrayItems
 774   // needs to remove observers from it.
 775   system_tray_notifier_.reset();
 776
 777   // These need a valid Shell instance to clean up properly, so explicitly
 778   // delete them before invalidating the instance.
 779   // Alphabetical. TODO(oshima): sort.
 780   magnification_controller_.reset();
 781   partial_magnification_controller_.reset();
 782   tooltip_controller_.reset();
 783   event_client_.reset();
 784   nested_accelerator_controller_.reset();
 785   toplevel_window_event_handler_.reset();
 786   visibility_controller_.reset();
 787   // |shelf_item_delegate_manager_| observes |shelf_model_|. It must be
 788   // destroyed before |shelf_model_| is destroyed.
 789   shelf_item_delegate_manager_.reset();
 790   shelf_model_.reset();
 791
 792   power_button_controller_.reset();
 793   lock_state_controller_.reset();
 794
 795 #if defined(OS_CHROMEOS)
 796   resolution_notification_controller_.reset();
 797 #endif
 798   desktop_background_controller_.reset();
 799   partial_screenshot_controller_.reset();
 800   mouse_cursor_filter_.reset();
 801
 802 #if defined(OS_CHROMEOS)
 803   touch_transformer_controller_.reset();
 804 #endif  // defined(OS_CHROMEOS)
 805
 806   // This also deletes all RootWindows. Note that we invoke Shutdown() on
 807   // WindowTreeHostManager before resetting |window_tree_host_manager_|, since
 808   // destruction
 809   // of its owned RootWindowControllers relies on the value.
 810   display_manager_->CreateScreenForShutdown();
 811   window_tree_host_manager_->Shutdown();
 812   window_tree_host_manager_.reset();
 813   screen_position_controller_.reset();
 814   accessibility_delegate_.reset();
 815   new_window_delegate_.reset();
 816   media_delegate_.reset();
 817
 818   keyboard::KeyboardController::ResetInstance(nullptr);
 819
 820 #if defined(OS_CHROMEOS)
 821   display_color_manager_.reset();
 822   if (display_change_observer_)
 823     display_configurator_->RemoveObserver(display_change_observer_.get());
 824   if (display_configurator_animation_)
 825     display_configurator_->RemoveObserver(
 826         display_configurator_animation_.get());
 827   if (display_error_observer_)
 828     display_configurator_->RemoveObserver(display_error_observer_.get());
 829   if (projecting_observer_) {
 830     display_configurator_->RemoveObserver(projecting_observer_.get());
 831     RemoveShellObserver(projecting_observer_.get());
 832   }
 833   display_change_observer_.reset();
 834
 835   PowerStatus::Shutdown();
 836
 837   // Ensure that DBusThreadManager outlives this Shell.
 838   DCHECK(chromeos::DBusThreadManager::IsInitialized());
 839 #endif
 840
 841   DCHECK(instance_ == this);
 842   instance_ = nullptr;
 843 }
 844
 845 void Shell::Init(const ShellInitParams& init_params) {
 846   delegate_->PreInit();
 847   bool display_initialized = display_manager_->InitFromCommandLine();
 848 #if defined(OS_CHROMEOS)
 849   display_configurator_->Init(!gpu_support_->IsPanelFittingDisabled());
 850   display_configurator_animation_.reset(new DisplayConfiguratorAnimation());
 851   display_configurator_->AddObserver(display_configurator_animation_.get());
 852
 853   // The DBusThreadManager must outlive this Shell. See the DCHECK in ~Shell.
 854   chromeos::DBusThreadManager* dbus_thread_manager =
 855       chromeos::DBusThreadManager::Get();
 856   projecting_observer_.reset(
 857       new ProjectingObserver(dbus_thread_manager->GetPowerManagerClient()));
 858   display_configurator_->AddObserver(projecting_observer_.get());
 859   AddShellObserver(projecting_observer_.get());
 860
 861   if (!display_initialized && base::SysInfo::IsRunningOnChromeOS()) {
 862     display_change_observer_.reset(new DisplayChangeObserver);
 863     // Register |display_change_observer_| first so that the rest of
 864     // observer gets invoked after the root windows are configured.
 865     display_configurator_->AddObserver(display_change_observer_.get());
 866     display_error_observer_.reset(new DisplayErrorObserver());
 867     display_configurator_->AddObserver(display_error_observer_.get());
 868     display_configurator_->set_state_controller(display_change_observer_.get());
 869     display_configurator_->set_mirroring_controller(display_manager_.get());
 870     display_configurator_->ForceInitialConfigure(
 871         delegate_->IsFirstRunAfterBoot() ? kChromeOsBootColor : 0);
 872     display_initialized = true;
 873   }
 874   display_color_manager_.reset(
 875       new DisplayColorManager(display_configurator_.get()));
 876 #endif  // defined(OS_CHROMEOS)
 877   if (!display_initialized)
 878     display_manager_->InitDefaultDisplay();
 879
 880   display_manager_->RefreshFontParams();
 881
 882   // Install the custom factory first so that views::FocusManagers for Tray,
 883   // Shelf, and WallPaper could be created by the factory.
 884   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
 885
 886   aura::Env::GetInstance()->set_context_factory(init_params.context_factory);
 887
 888   // The WindowModalityController needs to be at the front of the input event
 889   // pretarget handler list to ensure that it processes input events when modal
 890   // windows are active.
 891   window_modality_controller_.reset(
 892       new ::wm::WindowModalityController(this));
 893
 894   env_filter_.reset(new ::wm::CompoundEventFilter);
 895   AddPreTargetHandler(env_filter_.get());
 896
 897   wm::AshFocusRules* focus_rules = new wm::AshFocusRules();
 898
 899   ::wm::FocusController* focus_controller =
 900       new ::wm::FocusController(focus_rules);
 901   focus_client_.reset(focus_controller);
 902   activation_client_ = focus_controller;
 903   activation_client_->AddObserver(this);
 904   focus_cycler_.reset(new FocusCycler());
 905
 906   screen_position_controller_.reset(new ScreenPositionController);
 907
 908   window_tree_host_manager_->Start();
 909   window_tree_host_manager_->CreatePrimaryHost(
 910       ShellInitParamsToAshWindowTreeHostInitParams(init_params));
 911   aura::Window* root_window = window_tree_host_manager_->GetPrimaryRootWindow();
 912   target_root_window_ = root_window;
 913
 914 #if defined(OS_CHROMEOS)
 915   resolution_notification_controller_.reset(
 916       new ResolutionNotificationController);
 917 #endif
 918
 919   cursor_manager_.SetDisplay(GetScreen()->GetPrimaryDisplay());
 920
 921   nested_accelerator_controller_.reset(
 922       new ::wm::NestedAcceleratorController(new NestedAcceleratorDelegate));
 923   accelerator_controller_.reset(new AcceleratorController);
 924   maximize_mode_controller_.reset(new MaximizeModeController());
 925
 926   AddPreTargetHandler(window_tree_host_manager_->input_method_event_handler());
 927
 928 #if defined(OS_CHROMEOS)
 929   magnifier_key_scroll_handler_ = MagnifierKeyScroller::CreateHandler();
 930   AddPreTargetHandler(magnifier_key_scroll_handler_.get());
 931   speech_feedback_handler_ = SpokenFeedbackToggler::CreateHandler();
 932   AddPreTargetHandler(speech_feedback_handler_.get());
 933 #endif
 934
 935   // The order in which event filters are added is significant.
 936
 937   // ui::UserActivityDetector passes events to observers, so let them get
 938   // rewritten first.
 939   user_activity_detector_.reset(new ui::UserActivityDetector);
 940
 941   overlay_filter_.reset(new OverlayEventFilter);
 942   AddPreTargetHandler(overlay_filter_.get());
 943   AddShellObserver(overlay_filter_.get());
 944
 945   accelerator_filter_.reset(new ::wm::AcceleratorFilter(
 946       scoped_ptr< ::wm::AcceleratorDelegate>(new AcceleratorDelegate).Pass(),
 947       accelerator_controller_->accelerator_history()));
 948   AddPreTargetHandler(accelerator_filter_.get());
 949
 950   event_transformation_handler_.reset(new EventTransformationHandler);
 951   AddPreTargetHandler(event_transformation_handler_.get());
 952
 953   toplevel_window_event_handler_.reset(new ToplevelWindowEventHandler);
 954
 955   system_gesture_filter_.reset(new SystemGestureEventFilter);
 956   AddPreTargetHandler(system_gesture_filter_.get());
 957
 958   keyboard_metrics_filter_.reset(new KeyboardUMAEventFilter);
 959   AddPreTargetHandler(keyboard_metrics_filter_.get());
 960
 961   // The keyboard system must be initialized before the RootWindowController is
 962   // created.
 963 #if defined(OS_CHROMEOS)
 964     keyboard::InitializeKeyboard();
 965 #endif
 966
 967 #if defined(OS_CHROMEOS)
 968   sticky_keys_controller_.reset(new StickyKeysController);
 969 #endif
 970
 971   lock_state_controller_.reset(new LockStateController);
 972   power_button_controller_.reset(new PowerButtonController(
 973       lock_state_controller_.get()));
 974 #if defined(OS_CHROMEOS)
 975   // Pass the initial display state to PowerButtonController.
 976   power_button_controller_->OnDisplayModeChanged(
 977       display_configurator_->cached_displays());
 978 #endif
 979   AddShellObserver(lock_state_controller_.get());
 980
 981   drag_drop_controller_.reset(new DragDropController);
 982   // |partial_screenshot_controller_| needs to be created (and prepended as a
 983   // pre-target handler) at this point, because |mouse_cursor_filter_| needs to
 984   // process mouse events prior to partial screenshot session.
 985   // See http://crbug.com/459214
 986   partial_screenshot_controller_.reset(new PartialScreenshotController());
 987   mouse_cursor_filter_.reset(new MouseCursorEventFilter());
 988   PrependPreTargetHandler(mouse_cursor_filter_.get());
 989
 990   // Create Controllers that may need root window.
 991   // TODO(oshima): Move as many controllers before creating
 992   // RootWindowController as possible.
 993   visibility_controller_.reset(new AshVisibilityController);
 994
 995   magnification_controller_.reset(
 996       MagnificationController::CreateInstance());
 997   mru_window_tracker_.reset(new MruWindowTracker(activation_client_,
 998                                                  focus_rules));
 999
1000   partial_magnification_controller_.reset(
1001       new PartialMagnificationController());
1002
1003   autoclick_controller_.reset(AutoclickController::CreateInstance());
1004
1005   high_contrast_controller_.reset(new HighContrastController);
1006   video_detector_.reset(new VideoDetector);
1007   window_selector_controller_.reset(new WindowSelectorController());
1008   window_cycle_controller_.reset(new WindowCycleController());
1009
1010   tooltip_controller_.reset(new views::corewm::TooltipController(
1011       scoped_ptr<views::corewm::Tooltip>(new views::corewm::TooltipAura)));
1012   AddPreTargetHandler(tooltip_controller_.get());
1013
1014   event_client_.reset(new EventClientImpl);
1015
1016   // This controller needs to be set before SetupManagedWindowMode.
1017   desktop_background_controller_.reset(new DesktopBackgroundController());
1018   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
1019
1020   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
1021   accessibility_delegate_.reset(delegate_->CreateAccessibilityDelegate());
1022   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
1023   media_delegate_.reset(delegate_->CreateMediaDelegate());
1024
1025   resize_shadow_controller_.reset(new ResizeShadowController());
1026   shadow_controller_.reset(
1027       new ::wm::ShadowController(activation_client_));
1028
1029   // Create system_tray_notifier_ before the delegate.
1030   system_tray_notifier_.reset(new ash::SystemTrayNotifier());
1031
1032   // Initialize system_tray_delegate_ before initializing StatusAreaWidget.
1033   system_tray_delegate_.reset(delegate()->CreateSystemTrayDelegate());
1034   DCHECK(system_tray_delegate_.get());
1035
1036   locale_notification_controller_.reset(new LocaleNotificationController);
1037
1038   // Initialize system_tray_delegate_ after StatusAreaWidget is created.
1039   system_tray_delegate_->Initialize();
1040
1041 #if defined(OS_CHROMEOS)
1042   // Create the LogoutConfirmationController after the SystemTrayDelegate.
1043   logout_confirmation_controller_.reset(new LogoutConfirmationController(
1044       base::Bind(&SystemTrayDelegate::SignOut,
1045                  base::Unretained(system_tray_delegate_.get()))));
1046
1047   // Create TouchTransformerController before
1048   // WindowTreeHostManager::InitDisplays()
1049   // since TouchTransformerController listens on
1050   // WindowTreeHostManager::Observer::OnDisplaysInitialized().
1051   touch_transformer_controller_.reset(new TouchTransformerController());
1052 #endif  // defined(OS_CHROMEOS)
1053
1054   window_tree_host_manager_->InitHosts();
1055
1056 #if defined(OS_CHROMEOS)
1057   // Needs to be created after InitDisplays() since it may cause the virtual
1058   // keyboard to be deployed.
1059   virtual_keyboard_controller_.reset(new VirtualKeyboardController);
1060 #endif  // defined(OS_CHROMEOS)
1061
1062   // It needs to be created after RootWindowController has been created
1063   // (which calls OnWindowResized has been called, otherwise the
1064   // widget will not paint when restoring after a browser crash.  Also it needs
1065   // to be created after InitSecondaryDisplays() to initialize the wallpapers in
1066   // the correct size.
1067   user_wallpaper_delegate_->InitializeWallpaper();
1068
1069   if (initially_hide_cursor_)
1070     cursor_manager_.HideCursor();
1071   cursor_manager_.SetCursor(ui::kCursorPointer);
1072
1073 #if defined(OS_CHROMEOS)
1074   // Set accelerator controller delegates.
1075   accelerator_controller_->SetBrightnessControlDelegate(
1076       scoped_ptr<ash::BrightnessControlDelegate>(
1077           new ash::system::BrightnessControllerChromeos).Pass());
1078
1079   power_event_observer_.reset(new PowerEventObserver());
1080   user_activity_notifier_.reset(
1081       new ui::UserActivityPowerManagerNotifier(user_activity_detector_.get()));
1082   video_activity_notifier_.reset(
1083       new VideoActivityNotifier(video_detector_.get()));
1084   bluetooth_notification_controller_.reset(new BluetoothNotificationController);
1085   last_window_closed_logout_reminder_.reset(new LastWindowClosedLogoutReminder);
1086   screen_orientation_controller_.reset(new ScreenOrientationController());
1087 #endif
1088   // The compositor thread and main message loop have to be running in
1089   // order to create mirror window. Run it after the main message loop
1090   // is started.
1091   display_manager_->CreateMirrorWindowAsyncIfAny();
1092
1093   user_metrics_recorder_->OnShellInitialized();
1094 }
1095
1096 void Shell::InitKeyboard() {
1097   if (keyboard::IsKeyboardEnabled()) {
1098     if (keyboard::KeyboardController::GetInstance()) {
1099       RootWindowControllerList controllers = GetAllRootWindowControllers();
1100       for (RootWindowControllerList::iterator iter = controllers.begin();
1101            iter != controllers.end(); ++iter) {
1102         (*iter)->DeactivateKeyboard(
1103             keyboard::KeyboardController::GetInstance());
1104       }
1105     }
1106     keyboard::KeyboardControllerProxy* proxy =
1107         delegate_->CreateKeyboardControllerProxy();
1108     keyboard::KeyboardController::ResetInstance(
1109         new keyboard::KeyboardController(proxy));
1110   }
1111 }
1112
1113 void Shell::InitRootWindow(aura::Window* root_window) {
1114   DCHECK(activation_client_);
1115   DCHECK(visibility_controller_.get());
1116   DCHECK(drag_drop_controller_.get());
1117
1118   aura::client::SetFocusClient(root_window, focus_client_.get());
1119   aura::client::SetActivationClient(root_window, activation_client_);
1120   ::wm::FocusController* focus_controller =
1121       static_cast< ::wm::FocusController*>(activation_client_);
1122   root_window->AddPreTargetHandler(focus_controller);
1123   aura::client::SetVisibilityClient(root_window, visibility_controller_.get());
1124   aura::client::SetDragDropClient(root_window, drag_drop_controller_.get());
1125   aura::client::SetScreenPositionClient(root_window,
1126                                         screen_position_controller_.get());
1127   aura::client::SetCursorClient(root_window, &cursor_manager_);
1128   aura::client::SetTooltipClient(root_window, tooltip_controller_.get());
1129   aura::client::SetEventClient(root_window, event_client_.get());
1130
1131   aura::client::SetWindowMoveClient(root_window,
1132       toplevel_window_event_handler_.get());
1133   root_window->AddPreTargetHandler(toplevel_window_event_handler_.get());
1134   root_window->AddPostTargetHandler(toplevel_window_event_handler_.get());
1135
1136   if (nested_accelerator_controller_) {
1137     aura::client::SetDispatcherClient(root_window,
1138                                       nested_accelerator_controller_.get());
1139   }
1140 }
1141
1142 bool Shell::CanWindowReceiveEvents(aura::Window* window) {
1143   RootWindowControllerList controllers = GetAllRootWindowControllers();
1144   for (RootWindowControllerList::iterator iter = controllers.begin();
1145        iter != controllers.end(); ++iter) {
1146     SystemModalContainerLayoutManager* layout_manager =
1147         (*iter)->GetSystemModalLayoutManager(window);
1148     if (layout_manager && layout_manager->CanWindowReceiveEvents(window))
1149       return true;
1150     // Allow events to fall through to the virtual keyboard even if displaying
1151     // a system modal dialog.
1152     if ((*iter)->IsVirtualKeyboardWindow(window))
1153       return true;
1154   }
1155
1156   return false;
1157 }
1158
1159 ////////////////////////////////////////////////////////////////////////////////
1160 // Shell, ui::EventTarget overrides:
1161
1162 bool Shell::CanAcceptEvent(const ui::Event& event) {
1163   return true;
1164 }
1165
1166 ui::EventTarget* Shell::GetParentTarget() {
1167   return aura::Env::GetInstance();
1168 }
1169
1170 scoped_ptr<ui::EventTargetIterator> Shell::GetChildIterator() const {
1171   return scoped_ptr<ui::EventTargetIterator>();
1172 }
1173
1174 ui::EventTargeter* Shell::GetEventTargeter() {
1175   NOTREACHED();
1176   return nullptr;
1177 }
1178
1179 void Shell::OnEvent(ui::Event* event) {
1180 }
1181
1182 ////////////////////////////////////////////////////////////////////////////////
1183 // Shell, aura::client::ActivationChangeObserver implementation:
1184
1185 void Shell::OnWindowActivated(
1186     aura::client::ActivationChangeObserver::ActivationReason reason,
1187     aura::Window* gained_active,
1188     aura::Window* lost_active) {
1189   if (gained_active)
1190     target_root_window_ = gained_active->GetRootWindow();
1191 }
1192
1193 }  // namespace ash