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_filter.h"
  12 #include "ash/accelerators/focus_manager_factory.h"
  13 #include "ash/accelerators/nested_dispatcher_controller.h"
  14 #include "ash/ash_switches.h"
  15 #include "ash/autoclick/autoclick_controller.h"
  16 #include "ash/caps_lock_delegate.h"
  17 #include "ash/desktop_background/desktop_background_controller.h"
  18 #include "ash/desktop_background/desktop_background_view.h"
  19 #include "ash/desktop_background/user_wallpaper_delegate.h"
  20 #include "ash/display/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/resolution_notification_controller.h"
  25 #include "ash/display/screen_position_controller.h"
  26 #include "ash/display/virtual_keyboard_window_controller.h"
  27 #include "ash/drag_drop/drag_drop_controller.h"
  28 #include "ash/first_run/first_run_helper_impl.h"
  29 #include "ash/focus_cycler.h"
  30 #include "ash/high_contrast/high_contrast_controller.h"
  31 #include "ash/host/root_window_host_factory.h"
  32 #include "ash/keyboard_uma_event_filter.h"
  33 #include "ash/launcher/launcher_delegate.h"
  34 #include "ash/launcher/launcher_item_delegate.h"
  35 #include "ash/launcher/launcher_item_delegate_manager.h"
  36 #include "ash/magnifier/magnification_controller.h"
  37 #include "ash/magnifier/partial_magnification_controller.h"
  38 #include "ash/media_delegate.h"
  39 #include "ash/new_window_delegate.h"
  40 #include "ash/root_window_controller.h"
  41 #include "ash/screen_ash.h"
  42 #include "ash/session_state_delegate.h"
  43 #include "ash/shelf/app_list_shelf_item_delegate.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/shell_delegate.h"
  48 #include "ash/shell_factory.h"
  49 #include "ash/shell_window_ids.h"
  50 #include "ash/system/locale/locale_notification_controller.h"
  51 #include "ash/system/status_area_widget.h"
  52 #include "ash/system/tray/system_tray_delegate.h"
  53 #include "ash/system/tray/system_tray_notifier.h"
  54 #include "ash/wm/app_list_controller.h"
  55 #include "ash/wm/ash_focus_rules.h"
  56 #include "ash/wm/ash_native_cursor_manager.h"
  57 #include "ash/wm/base_layout_manager.h"
  58 #include "ash/wm/coordinate_conversion.h"
  59 #include "ash/wm/custom_frame_view_ash.h"
  60 #include "ash/wm/event_client_impl.h"
  61 #include "ash/wm/event_rewriter_event_filter.h"
  62 #include "ash/wm/lock_state_controller.h"
  63 #include "ash/wm/mru_window_tracker.h"
  64 #include "ash/wm/overlay_event_filter.h"
  65 #include "ash/wm/overview/window_selector_controller.h"
  66 #include "ash/wm/power_button_controller.h"
  67 #include "ash/wm/resize_shadow_controller.h"
  68 #include "ash/wm/root_window_layout_manager.h"
  69 #include "ash/wm/screen_dimmer.h"
  70 #include "ash/wm/system_gesture_event_filter.h"
  71 #include "ash/wm/system_modal_container_event_filter.h"
  72 #include "ash/wm/system_modal_container_layout_manager.h"
  73 #include "ash/wm/user_activity_detector.h"
  74 #include "ash/wm/video_detector.h"
  75 #include "ash/wm/window_animations.h"
  76 #include "ash/wm/window_cycle_controller.h"
  77 #include "ash/wm/window_positioner.h"
  78 #include "ash/wm/window_properties.h"
  79 #include "ash/wm/window_util.h"
  80 #include "ash/wm/workspace_controller.h"
  81 #include "base/bind.h"
  82 #include "base/command_line.h"
  83 #include "base/debug/leak_annotations.h"
  84 #include "base/debug/trace_event.h"
  85 #include "ui/aura/client/aura_constants.h"
  86 #include "ui/aura/client/user_action_client.h"
  87 #include "ui/aura/env.h"
  88 #include "ui/aura/layout_manager.h"
  89 #include "ui/aura/root_window.h"
  90 #include "ui/aura/window.h"
  91 #include "ui/base/ui_base_switches.h"
  92 #include "ui/compositor/layer.h"
  93 #include "ui/compositor/layer_animator.h"
  94 #include "ui/gfx/display.h"
  95 #include "ui/gfx/image/image_skia.h"
  96 #include "ui/gfx/screen.h"
  97 #include "ui/gfx/size.h"
  98 #include "ui/keyboard/keyboard.h"
  99 #include "ui/keyboard/keyboard_controller.h"
 100 #include "ui/keyboard/keyboard_switches.h"
 101 #include "ui/keyboard/keyboard_util.h"
 102 #include "ui/message_center/message_center.h"
 103 #include "ui/views/corewm/compound_event_filter.h"
 104 #include "ui/views/corewm/corewm_switches.h"
 105 #include "ui/views/corewm/focus_controller.h"
 106 #include "ui/views/corewm/input_method_event_filter.h"
 107 #include "ui/views/corewm/shadow_controller.h"
 108 #include "ui/views/corewm/tooltip_aura.h"
 109 #include "ui/views/corewm/tooltip_controller.h"
 110 #include "ui/views/corewm/visibility_controller.h"
 111 #include "ui/views/corewm/window_modality_controller.h"
 112 #include "ui/views/focus/focus_manager_factory.h"
 113 #include "ui/views/widget/native_widget_aura.h"
 114 #include "ui/views/widget/widget.h"
 115
 116 #if defined(OS_CHROMEOS)
 117 #if defined(USE_X11)
 118 #include "ash/ash_constants.h"
 119 #include "ash/display/display_change_observer_chromeos.h"
 120 #include "ash/display/display_error_observer_chromeos.h"
 121 #include "ash/display/output_configurator_animation.h"
 122 #include "base/message_loop/message_pump_x11.h"
 123 #include "base/sys_info.h"
 124 #include "chromeos/display/output_configurator.h"
 125 #include "content/public/browser/gpu_data_manager.h"
 126 #include "gpu/config/gpu_feature_type.h"
 127 #endif  // defined(USE_X11)
 128 #include "ash/system/chromeos/brightness/brightness_controller_chromeos.h"
 129 #include "ash/system/chromeos/power/power_event_observer.h"
 130 #include "ash/system/chromeos/power/power_status.h"
 131 #include "ash/system/chromeos/power/user_activity_notifier.h"
 132 #include "ash/system/chromeos/power/video_activity_notifier.h"
 133 #include "ash/wm/sticky_keys.h"
 134 #endif  // defined(OS_CHROMEOS)
 135
 136 namespace ash {
 137
 138 namespace {
 139
 140 using aura::Window;
 141 using views::Widget;
 142
 143 // A Corewm VisibilityController subclass that calls the Ash animation routine
 144 // so we can pick up our extended animations. See ash/wm/window_animations.h.
 145 class AshVisibilityController : public views::corewm::VisibilityController {
 146  public:
 147   AshVisibilityController() {}
 148   virtual ~AshVisibilityController() {}
 149
 150  private:
 151   // Overridden from views::corewm::VisibilityController:
 152   virtual bool CallAnimateOnChildWindowVisibilityChanged(
 153       aura::Window* window,
 154       bool visible) OVERRIDE {
 155     return AnimateOnChildWindowVisibilityChanged(window, visible);
 156   }
 157
 158   DISALLOW_COPY_AND_ASSIGN(AshVisibilityController);
 159 };
 160
 161 }  // namespace
 162
 163 // static
 164 Shell* Shell::instance_ = NULL;
 165 // static
 166 bool Shell::initially_hide_cursor_ = false;
 167
 168 ////////////////////////////////////////////////////////////////////////////////
 169 // Shell, public:
 170
 171 // static
 172 Shell* Shell::CreateInstance(ShellDelegate* delegate) {
 173   CHECK(!instance_);
 174   instance_ = new Shell(delegate);
 175   instance_->Init();
 176   return instance_;
 177 }
 178
 179 // static
 180 Shell* Shell::GetInstance() {
 181   DCHECK(instance_);
 182   return instance_;
 183 }
 184
 185 // static
 186 bool Shell::HasInstance() {
 187   return !!instance_;
 188 }
 189
 190 // static
 191 void Shell::DeleteInstance() {
 192   delete instance_;
 193   instance_ = NULL;
 194 }
 195
 196 // static
 197 internal::RootWindowController* Shell::GetPrimaryRootWindowController() {
 198   return internal::GetRootWindowController(GetPrimaryRootWindow());
 199 }
 200
 201 // static
 202 Shell::RootWindowControllerList Shell::GetAllRootWindowControllers() {
 203   return Shell::GetInstance()->display_controller()->
 204       GetAllRootWindowControllers();
 205 }
 206
 207 // static
 208 aura::Window* Shell::GetPrimaryRootWindow() {
 209   return GetInstance()->display_controller()->GetPrimaryRootWindow();
 210 }
 211
 212 // static
 213 aura::Window* Shell::GetTargetRootWindow() {
 214   Shell* shell = GetInstance();
 215   if (shell->scoped_target_root_window_)
 216     return shell->scoped_target_root_window_;
 217   return shell->target_root_window_;
 218 }
 219
 220 // static
 221 gfx::Screen* Shell::GetScreen() {
 222   return gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_ALTERNATE);
 223 }
 224
 225 // static
 226 aura::Window::Windows Shell::GetAllRootWindows() {
 227   return Shell::GetInstance()->display_controller()->
 228       GetAllRootWindows();
 229 }
 230
 231 // static
 232 aura::Window* Shell::GetContainer(aura::Window* root_window,
 233                                   int container_id) {
 234   return root_window->GetChildById(container_id);
 235 }
 236
 237 // static
 238 const aura::Window* Shell::GetContainer(const aura::Window* root_window,
 239                                         int container_id) {
 240   return root_window->GetChildById(container_id);
 241 }
 242
 243 // static
 244 std::vector<aura::Window*> Shell::GetContainersFromAllRootWindows(
 245     int container_id,
 246     aura::Window* priority_root) {
 247   std::vector<aura::Window*> containers;
 248   aura::Window::Windows root_windows = GetAllRootWindows();
 249   for (aura::Window::Windows::const_iterator it = root_windows.begin();
 250        it != root_windows.end(); ++it) {
 251     aura::Window* container = (*it)->GetChildById(container_id);
 252     if (container) {
 253       if (priority_root && priority_root->Contains(container))
 254         containers.insert(containers.begin(), container);
 255       else
 256         containers.push_back(container);
 257     }
 258   }
 259   return containers;
 260 }
 261
 262 void Shell::ShowContextMenu(const gfx::Point& location_in_screen,
 263                             ui::MenuSourceType source_type) {
 264   // No context menus if there is no session with an active user.
 265   if (!session_state_delegate_->NumberOfLoggedInUsers())
 266     return;
 267   // No context menus when screen is locked.
 268   if (session_state_delegate_->IsScreenLocked())
 269     return;
 270
 271   aura::Window* root =
 272       wm::GetRootWindowMatching(gfx::Rect(location_in_screen, gfx::Size()));
 273   internal::GetRootWindowController(root)->
 274       ShowContextMenu(location_in_screen, source_type);
 275 }
 276
 277 void Shell::ToggleAppList(aura::Window* window) {
 278   // If the context window is not given, show it on the target root window.
 279   if (!window)
 280     window = GetTargetRootWindow();
 281   if (!app_list_controller_)
 282     app_list_controller_.reset(new internal::AppListController);
 283   app_list_controller_->SetVisible(!app_list_controller_->IsVisible(), window);
 284 }
 285
 286 bool Shell::GetAppListTargetVisibility() const {
 287   return app_list_controller_.get() &&
 288       app_list_controller_->GetTargetVisibility();
 289 }
 290
 291 aura::Window* Shell::GetAppListWindow() {
 292   return app_list_controller_.get() ? app_list_controller_->GetWindow() : NULL;
 293 }
 294
 295 app_list::AppListView* Shell::GetAppListView() {
 296   return app_list_controller_.get() ? app_list_controller_->GetView() : NULL;
 297 }
 298
 299 bool Shell::IsSystemModalWindowOpen() const {
 300   if (simulate_modal_window_open_for_testing_)
 301     return true;
 302   const std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 303       internal::kShellWindowId_SystemModalContainer, NULL);
 304   for (std::vector<aura::Window*>::const_iterator cit = containers.begin();
 305        cit != containers.end(); ++cit) {
 306     for (aura::Window::Windows::const_iterator wit = (*cit)->children().begin();
 307          wit != (*cit)->children().end(); ++wit) {
 308       if ((*wit)->GetProperty(aura::client::kModalKey) ==
 309           ui::MODAL_TYPE_SYSTEM && (*wit)->TargetVisibility()) {
 310         return true;
 311       }
 312     }
 313   }
 314   return false;
 315 }
 316
 317 views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
 318     views::Widget* widget) {
 319   // Use translucent-style window frames for dialogs.
 320   return new CustomFrameViewAsh(widget);
 321 }
 322
 323 void Shell::RotateFocus(Direction direction) {
 324   focus_cycler_->RotateFocus(
 325       direction == FORWARD ? internal::FocusCycler::FORWARD :
 326                              internal::FocusCycler::BACKWARD);
 327 }
 328
 329 void Shell::SetDisplayWorkAreaInsets(Window* contains,
 330                                      const gfx::Insets& insets) {
 331   if (!display_controller_->UpdateWorkAreaOfDisplayNearestWindow(
 332           contains, insets)) {
 333     return;
 334   }
 335   FOR_EACH_OBSERVER(ShellObserver, observers_,
 336                     OnDisplayWorkAreaInsetsChanged());
 337 }
 338
 339 void Shell::OnLoginStateChanged(user::LoginStatus status) {
 340   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLoginStateChanged(status));
 341 }
 342
 343 void Shell::OnLoginUserProfilePrepared() {
 344   CreateLauncher();
 345   CreateKeyboard();
 346 }
 347
 348 void Shell::UpdateAfterLoginStatusChange(user::LoginStatus status) {
 349   RootWindowControllerList controllers = GetAllRootWindowControllers();
 350   for (RootWindowControllerList::iterator iter = controllers.begin();
 351        iter != controllers.end(); ++iter)
 352     (*iter)->UpdateAfterLoginStatusChange(status);
 353 }
 354
 355 void Shell::OnAppTerminating() {
 356   FOR_EACH_OBSERVER(ShellObserver, observers_, OnAppTerminating());
 357 }
 358
 359 void Shell::OnLockStateChanged(bool locked) {
 360   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLockStateChanged(locked));
 361 #ifndef NDEBUG
 362   // Make sure that there is no system modal in Lock layer when unlocked.
 363   if (!locked) {
 364     std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 365         internal::kShellWindowId_LockSystemModalContainer,
 366         GetPrimaryRootWindow());
 367     for (std::vector<aura::Window*>::const_iterator iter = containers.begin();
 368          iter != containers.end(); ++iter) {
 369       DCHECK_EQ(0u, (*iter)->children().size());
 370     }
 371   }
 372 #endif
 373 }
 374
 375 void Shell::CreateLauncher() {
 376   RootWindowControllerList controllers = GetAllRootWindowControllers();
 377   for (RootWindowControllerList::iterator iter = controllers.begin();
 378        iter != controllers.end(); ++iter)
 379     (*iter)->shelf()->CreateLauncher();
 380 }
 381
 382 void Shell::CreateKeyboard() {
 383   // TODO(bshe): Primary root window controller may not be the controller to
 384   // attach virtual keyboard. See http://crbug.com/303429
 385   InitKeyboard();
 386   if (keyboard::IsKeyboardUsabilityExperimentEnabled()) {
 387     display_controller()->virtual_keyboard_window_controller()->
 388         ActivateKeyboard(keyboard_controller_.get());
 389   } else {
 390     GetPrimaryRootWindowController()->
 391         ActivateKeyboard(keyboard_controller_.get());
 392   }
 393 }
 394
 395 void Shell::ShowLauncher() {
 396   RootWindowControllerList controllers = GetAllRootWindowControllers();
 397   for (RootWindowControllerList::iterator iter = controllers.begin();
 398        iter != controllers.end(); ++iter)
 399     (*iter)->ShowLauncher();
 400 }
 401
 402 void Shell::AddShellObserver(ShellObserver* observer) {
 403   observers_.AddObserver(observer);
 404 }
 405
 406 void Shell::RemoveShellObserver(ShellObserver* observer) {
 407   observers_.RemoveObserver(observer);
 408 }
 409
 410 void Shell::UpdateShelfVisibility() {
 411   RootWindowControllerList controllers = GetAllRootWindowControllers();
 412   for (RootWindowControllerList::iterator iter = controllers.begin();
 413        iter != controllers.end(); ++iter)
 414     if ((*iter)->shelf())
 415       (*iter)->UpdateShelfVisibility();
 416 }
 417
 418 void Shell::SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior,
 419                                      aura::Window* root_window) {
 420   ash::internal::ShelfLayoutManager::ForLauncher(root_window)->
 421       SetAutoHideBehavior(behavior);
 422 }
 423
 424 ShelfAutoHideBehavior Shell::GetShelfAutoHideBehavior(
 425     aura::Window* root_window) const {
 426   return ash::internal::ShelfLayoutManager::ForLauncher(root_window)->
 427       auto_hide_behavior();
 428 }
 429
 430 void Shell::SetShelfAlignment(ShelfAlignment alignment,
 431                               aura::Window* root_window) {
 432   if (ash::internal::ShelfLayoutManager::ForLauncher(root_window)->
 433       SetAlignment(alignment)) {
 434     FOR_EACH_OBSERVER(
 435         ShellObserver, observers_, OnShelfAlignmentChanged(root_window));
 436   }
 437 }
 438
 439 ShelfAlignment Shell::GetShelfAlignment(aura::Window* root_window) {
 440   return internal::GetRootWindowController(root_window)->
 441       GetShelfLayoutManager()->GetAlignment();
 442 }
 443
 444 void Shell::SetDimming(bool should_dim) {
 445   RootWindowControllerList controllers = GetAllRootWindowControllers();
 446   for (RootWindowControllerList::iterator iter = controllers.begin();
 447        iter != controllers.end(); ++iter)
 448     (*iter)->screen_dimmer()->SetDimming(should_dim);
 449 }
 450
 451 void Shell::NotifyFullscreenStateChange(bool is_fullscreen,
 452                                         aura::Window* root_window) {
 453   FOR_EACH_OBSERVER(ShellObserver, observers_, OnFullscreenStateChanged(
 454       is_fullscreen, root_window));
 455 }
 456
 457 void Shell::CreateModalBackground(aura::Window* window) {
 458   if (!modality_filter_) {
 459     modality_filter_.reset(new internal::SystemModalContainerEventFilter(this));
 460     AddPreTargetHandler(modality_filter_.get());
 461   }
 462   RootWindowControllerList controllers = GetAllRootWindowControllers();
 463   for (RootWindowControllerList::iterator iter = controllers.begin();
 464        iter != controllers.end(); ++iter)
 465     (*iter)->GetSystemModalLayoutManager(window)->CreateModalBackground();
 466 }
 467
 468 void Shell::OnModalWindowRemoved(aura::Window* removed) {
 469   RootWindowControllerList controllers = GetAllRootWindowControllers();
 470   bool activated = false;
 471   for (RootWindowControllerList::iterator iter = controllers.begin();
 472        iter != controllers.end() && !activated; ++iter) {
 473     activated = (*iter)->GetSystemModalLayoutManager(removed)->
 474         ActivateNextModalWindow();
 475   }
 476   if (!activated) {
 477     RemovePreTargetHandler(modality_filter_.get());
 478     modality_filter_.reset();
 479     for (RootWindowControllerList::iterator iter = controllers.begin();
 480          iter != controllers.end(); ++iter)
 481       (*iter)->GetSystemModalLayoutManager(removed)->DestroyModalBackground();
 482   }
 483 }
 484
 485 WebNotificationTray* Shell::GetWebNotificationTray() {
 486   return GetPrimaryRootWindowController()->shelf()->
 487       status_area_widget()->web_notification_tray();
 488 }
 489
 490 bool Shell::HasPrimaryStatusArea() {
 491   ShelfWidget* shelf = GetPrimaryRootWindowController()->shelf();
 492   return shelf && shelf->status_area_widget();
 493 }
 494
 495 SystemTray* Shell::GetPrimarySystemTray() {
 496   return GetPrimaryRootWindowController()->GetSystemTray();
 497 }
 498
 499 LauncherDelegate* Shell::GetLauncherDelegate() {
 500   if (!launcher_delegate_) {
 501     shelf_model_.reset(new ShelfModel);
 502     // Creates LauncherItemDelegateManager before LauncherDelegate.
 503     launcher_item_delegate_manager_.reset(
 504         new LauncherItemDelegateManager(shelf_model_.get()));
 505
 506     launcher_delegate_.reset(
 507         delegate_->CreateLauncherDelegate(shelf_model_.get()));
 508     scoped_ptr<LauncherItemDelegate> controller(
 509         new internal::AppListShelfItemDelegate);
 510
 511     // Finding the shelf model's location of the app list and setting its
 512     // LauncherItemDelegate.
 513     int app_list_index = shelf_model_->GetItemIndexForType(TYPE_APP_LIST);
 514     DCHECK_GE(app_list_index, 0);
 515     LauncherID app_list_id = shelf_model_->items()[app_list_index].id;
 516     DCHECK(app_list_id);
 517     launcher_item_delegate_manager_->SetLauncherItemDelegate(
 518         app_list_id,
 519         controller.Pass());
 520   }
 521   return launcher_delegate_.get();
 522 }
 523
 524 void Shell::SetTouchHudProjectionEnabled(bool enabled) {
 525   if (is_touch_hud_projection_enabled_ == enabled)
 526     return;
 527
 528   is_touch_hud_projection_enabled_ = enabled;
 529   FOR_EACH_OBSERVER(ShellObserver, observers_,
 530                     OnTouchHudProjectionToggled(enabled));
 531 }
 532
 533 #if defined(OS_CHROMEOS)
 534 ash::FirstRunHelper* Shell::CreateFirstRunHelper() {
 535   return new ash::FirstRunHelperImpl;
 536 }
 537 #endif  // defined(OS_CHROMEOS)
 538
 539 void Shell::DoInitialWorkspaceAnimation() {
 540   return GetPrimaryRootWindowController()->workspace_controller()->
 541       DoInitialAnimation();
 542 }
 543
 544 ////////////////////////////////////////////////////////////////////////////////
 545 // Shell, private:
 546
 547 Shell::Shell(ShellDelegate* delegate)
 548     : screen_(new ScreenAsh),
 549       target_root_window_(NULL),
 550       scoped_target_root_window_(NULL),
 551       delegate_(delegate),
 552       window_positioner_(new WindowPositioner),
 553       activation_client_(NULL),
 554 #if defined(OS_CHROMEOS) && defined(USE_X11)
 555       output_configurator_(new chromeos::OutputConfigurator()),
 556 #endif  // defined(OS_CHROMEOS) && defined(USE_X11)
 557       native_cursor_manager_(new AshNativeCursorManager),
 558       cursor_manager_(scoped_ptr<views::corewm::NativeCursorManager>(
 559           native_cursor_manager_)),
 560       simulate_modal_window_open_for_testing_(false),
 561       is_touch_hud_projection_enabled_(false) {
 562   DCHECK(delegate_.get());
 563   display_manager_.reset(new internal::DisplayManager);
 564
 565   ANNOTATE_LEAKING_OBJECT_PTR(screen_);  // see crbug.com/156466
 566   gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE, screen_);
 567   if (!gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE))
 568     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, screen_);
 569   display_controller_.reset(new DisplayController);
 570 #if defined(OS_CHROMEOS) && defined(USE_X11)
 571   bool is_panel_fitting_disabled =
 572       content::GpuDataManager::GetInstance()->IsFeatureBlacklisted(
 573           gpu::GPU_FEATURE_TYPE_PANEL_FITTING);
 574
 575   output_configurator_->Init(!is_panel_fitting_disabled);
 576   periodic_metrics_recorder_.reset(new PeriodicMetricsRecorder);
 577
 578   base::MessagePumpX11::Current()->AddDispatcherForRootWindow(
 579       output_configurator());
 580   // We can't do this with a root window listener because XI_HierarchyChanged
 581   // messages don't have a target window.
 582   base::MessagePumpX11::Current()->AddObserver(output_configurator());
 583 #endif  // defined(OS_CHROMEOS)
 584
 585 #if defined(OS_CHROMEOS)
 586   internal::PowerStatus::Initialize();
 587 #endif
 588 }
 589
 590 Shell::~Shell() {
 591   TRACE_EVENT0("shutdown", "ash::Shell::Destructor");
 592
 593   views::FocusManagerFactory::Install(NULL);
 594
 595   // Remove the focus from any window. This will prevent overhead and side
 596   // effects (e.g. crashes) from changing focus during shutdown.
 597   // See bug crbug.com/134502.
 598   aura::client::GetFocusClient(GetPrimaryRootWindow())->FocusWindow(NULL);
 599
 600   // Please keep in same order as in Init() because it's easy to miss one.
 601   if (window_modality_controller_)
 602     window_modality_controller_.reset();
 603   RemovePreTargetHandler(event_rewriter_filter_.get());
 604   RemovePreTargetHandler(user_activity_detector_.get());
 605   RemovePreTargetHandler(overlay_filter_.get());
 606   RemovePreTargetHandler(input_method_filter_.get());
 607   if (mouse_cursor_filter_)
 608     RemovePreTargetHandler(mouse_cursor_filter_.get());
 609   RemovePreTargetHandler(system_gesture_filter_.get());
 610   RemovePreTargetHandler(keyboard_metrics_filter_.get());
 611   RemovePreTargetHandler(event_transformation_handler_.get());
 612   RemovePreTargetHandler(accelerator_filter_.get());
 613
 614   // TooltipController is deleted with the Shell so removing its references.
 615   RemovePreTargetHandler(tooltip_controller_.get());
 616
 617   // AppList needs to be released before shelf layout manager, which is
 618   // destroyed with launcher container in the loop below. However, app list
 619   // container is now on top of launcher container and released after it.
 620   // TODO(xiyuan): Move it back when app list container is no longer needed.
 621   app_list_controller_.reset();
 622
 623   // Destroy SystemTrayDelegate before destroying the status area(s).
 624   system_tray_delegate_->Shutdown();
 625   system_tray_delegate_.reset();
 626
 627   locale_notification_controller_.reset();
 628
 629   // Drag-and-drop must be canceled prior to close all windows.
 630   drag_drop_controller_.reset();
 631
 632   // Destroy all child windows including widgets.
 633   display_controller_->CloseChildWindows();
 634   display_controller_->CloseNonDesktopDisplay();
 635
 636   // Destroy SystemTrayNotifier after destroying SystemTray as TrayItems
 637   // needs to remove observers from it.
 638   system_tray_notifier_.reset();
 639
 640 #if defined(OS_CHROMEOS)
 641   // Destroy VideoActivityNotifier before destroying VideoDetector.
 642   video_activity_notifier_.reset();
 643 #endif  // defined(OS_CHROMEOS)
 644
 645   // These need a valid Shell instance to clean up properly, so explicitly
 646   // delete them before invalidating the instance.
 647   // Alphabetical. TODO(oshima): sort.
 648   magnification_controller_.reset();
 649   partial_magnification_controller_.reset();
 650   resize_shadow_controller_.reset();
 651   shadow_controller_.reset();
 652   tooltip_controller_.reset();
 653   event_client_.reset();
 654   window_cycle_controller_.reset();
 655   nested_dispatcher_controller_.reset();
 656   user_action_client_.reset();
 657   visibility_controller_.reset();
 658   launcher_delegate_.reset();
 659   // |launcher_item_delegate_manager_| observes |shelf_model_|. It must be
 660   // destroyed before |shelf_model_| is destroyed.
 661   launcher_item_delegate_manager_.reset();
 662   shelf_model_.reset();
 663   video_detector_.reset();
 664
 665   power_button_controller_.reset();
 666   lock_state_controller_.reset();
 667   mru_window_tracker_.reset();
 668
 669   resolution_notification_controller_.reset();
 670   desktop_background_controller_.reset();
 671
 672   // This also deletes all RootWindows. Note that we invoke Shutdown() on
 673   // DisplayController before resetting |display_controller_|, since destruction
 674   // of its owned RootWindowControllers relies on the value.
 675   display_controller_->Shutdown();
 676   display_controller_.reset();
 677   screen_position_controller_.reset();
 678
 679   keyboard_controller_.reset();
 680   accessibility_delegate_.reset();
 681   new_window_delegate_.reset();
 682   media_delegate_.reset();
 683
 684 #if defined(OS_CHROMEOS) && defined(USE_X11)
 685    if (display_change_observer_)
 686     output_configurator_->RemoveObserver(display_change_observer_.get());
 687   if (output_configurator_animation_)
 688     output_configurator_->RemoveObserver(output_configurator_animation_.get());
 689   if (display_error_observer_)
 690     output_configurator_->RemoveObserver(display_error_observer_.get());
 691   base::MessagePumpX11::Current()->RemoveDispatcherForRootWindow(
 692       output_configurator());
 693   base::MessagePumpX11::Current()->RemoveObserver(output_configurator());
 694   display_change_observer_.reset();
 695 #endif  // defined(OS_CHROMEOS)
 696
 697 #if defined(OS_CHROMEOS)
 698   internal::PowerStatus::Shutdown();
 699 #endif
 700
 701   DCHECK(instance_ == this);
 702   instance_ = NULL;
 703 }
 704
 705 void Shell::Init() {
 706   CommandLine* command_line = CommandLine::ForCurrentProcess();
 707
 708   delegate_->PreInit();
 709   if (keyboard::IsKeyboardUsabilityExperimentEnabled()) {
 710     display_manager_->SetSecondDisplayMode(
 711         internal::DisplayManager::VIRTUAL_KEYBOARD);
 712   }
 713   bool display_initialized = display_manager_->InitFromCommandLine();
 714 #if defined(OS_CHROMEOS) && defined(USE_X11)
 715   output_configurator_animation_.reset(
 716       new internal::OutputConfiguratorAnimation());
 717   output_configurator_->AddObserver(output_configurator_animation_.get());
 718
 719   if (!display_initialized && base::SysInfo::IsRunningOnChromeOS()) {
 720     display_change_observer_.reset(new internal::DisplayChangeObserver);
 721     // Register |display_change_observer_| first so that the rest of
 722     // observer gets invoked after the root windows are configured.
 723     output_configurator_->AddObserver(display_change_observer_.get());
 724     display_error_observer_.reset(new internal::DisplayErrorObserver());
 725     output_configurator_->AddObserver(display_error_observer_.get());
 726     output_configurator_->set_state_controller(display_change_observer_.get());
 727     output_configurator_->set_mirroring_controller(display_manager_.get());
 728     output_configurator_->Start(
 729         delegate_->IsFirstRunAfterBoot() ? kChromeOsBootColor : 0);
 730     display_initialized = true;
 731   }
 732 #endif  // defined(OS_CHROMEOS) && defined(USE_X11)
 733   if (!display_initialized)
 734     display_manager_->InitDefaultDisplay();
 735
 736   // Install the custom factory first so that views::FocusManagers for Tray,
 737   // Launcher, and WallPaper could be created by the factory.
 738   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
 739
 740   // Env creates the compositor. Historically it seems to have been implicitly
 741   // initialized first by the ActivationController, but now that FocusController
 742   // no longer does this we need to do it explicitly.
 743   aura::Env::CreateInstance();
 744
 745   // The WindowModalityController needs to be at the front of the input event
 746   // pretarget handler list to ensure that it processes input events when modal
 747   // windows are active.
 748   window_modality_controller_.reset(
 749       new views::corewm::WindowModalityController(this));
 750
 751   AddPreTargetHandler(this);
 752
 753   env_filter_.reset(new views::corewm::CompoundEventFilter);
 754   AddPreTargetHandler(env_filter_.get());
 755
 756   views::corewm::FocusController* focus_controller =
 757       new views::corewm::FocusController(new wm::AshFocusRules);
 758   focus_client_.reset(focus_controller);
 759   activation_client_ = focus_controller;
 760   activation_client_->AddObserver(this);
 761   focus_cycler_.reset(new internal::FocusCycler());
 762
 763   screen_position_controller_.reset(new internal::ScreenPositionController);
 764   root_window_host_factory_.reset(delegate_->CreateRootWindowHostFactory());
 765
 766   display_controller_->Start();
 767   display_controller_->InitPrimaryDisplay();
 768   aura::Window* root_window = display_controller_->GetPrimaryRootWindow();
 769   target_root_window_ = root_window;
 770
 771   resolution_notification_controller_.reset(
 772       new internal::ResolutionNotificationController);
 773
 774   cursor_manager_.SetDisplay(DisplayController::GetPrimaryDisplay());
 775
 776   nested_dispatcher_controller_.reset(new NestedDispatcherController);
 777   accelerator_controller_.reset(new AcceleratorController);
 778
 779   // The order in which event filters are added is significant.
 780   event_rewriter_filter_.reset(new internal::EventRewriterEventFilter);
 781   AddPreTargetHandler(event_rewriter_filter_.get());
 782
 783 #if defined(OS_CHROMEOS)
 784   // The StickyKeys event filter also rewrites events and must be added
 785   // before observers, but after the EventRewriterEventFilter.
 786   sticky_keys_.reset(new StickyKeys);
 787   AddPreTargetHandler(sticky_keys_.get());
 788 #endif
 789
 790   // UserActivityDetector passes events to observers, so let them get
 791   // rewritten first.
 792   user_activity_detector_.reset(new UserActivityDetector);
 793   AddPreTargetHandler(user_activity_detector_.get());
 794
 795   overlay_filter_.reset(new internal::OverlayEventFilter);
 796   AddPreTargetHandler(overlay_filter_.get());
 797   AddShellObserver(overlay_filter_.get());
 798
 799   input_method_filter_.reset(new views::corewm::InputMethodEventFilter(
 800       root_window->GetDispatcher()->host()->GetAcceleratedWidget()));
 801   AddPreTargetHandler(input_method_filter_.get());
 802
 803   accelerator_filter_.reset(new internal::AcceleratorFilter);
 804   AddPreTargetHandler(accelerator_filter_.get());
 805
 806   event_transformation_handler_.reset(new internal::EventTransformationHandler);
 807   AddPreTargetHandler(event_transformation_handler_.get());
 808
 809   system_gesture_filter_.reset(new internal::SystemGestureEventFilter);
 810   AddPreTargetHandler(system_gesture_filter_.get());
 811
 812   keyboard_metrics_filter_.reset(new internal::KeyboardUMAEventFilter);
 813   AddPreTargetHandler(keyboard_metrics_filter_.get());
 814
 815   // The keyboard system must be initialized before the RootWindowController is
 816   // created.
 817   if (keyboard::IsKeyboardEnabled())
 818     keyboard::InitializeKeyboard();
 819
 820   lock_state_controller_.reset(new LockStateController);
 821   power_button_controller_.reset(new PowerButtonController(
 822       lock_state_controller_.get()));
 823   AddShellObserver(lock_state_controller_.get());
 824
 825   drag_drop_controller_.reset(new internal::DragDropController);
 826   mouse_cursor_filter_.reset(new internal::MouseCursorEventFilter());
 827   PrependPreTargetHandler(mouse_cursor_filter_.get());
 828
 829   // Create Controllers that may need root window.
 830   // TODO(oshima): Move as many controllers before creating
 831   // RootWindowController as possible.
 832   visibility_controller_.reset(new AshVisibilityController);
 833   user_action_client_.reset(delegate_->CreateUserActionClient());
 834
 835   magnification_controller_.reset(
 836       MagnificationController::CreateInstance());
 837   mru_window_tracker_.reset(new MruWindowTracker(activation_client_));
 838
 839   partial_magnification_controller_.reset(
 840       new PartialMagnificationController());
 841
 842   autoclick_controller_.reset(AutoclickController::CreateInstance());
 843
 844   high_contrast_controller_.reset(new HighContrastController);
 845   video_detector_.reset(new VideoDetector);
 846   window_cycle_controller_.reset(new WindowCycleController());
 847   window_selector_controller_.reset(new WindowSelectorController());
 848
 849   tooltip_controller_.reset(
 850       new views::corewm::TooltipController(
 851           scoped_ptr<views::corewm::Tooltip>(
 852               new views::corewm::TooltipAura(gfx::SCREEN_TYPE_ALTERNATE))));
 853   AddPreTargetHandler(tooltip_controller_.get());
 854
 855   event_client_.reset(new internal::EventClientImpl);
 856
 857   // This controller needs to be set before SetupManagedWindowMode.
 858   desktop_background_controller_.reset(new DesktopBackgroundController());
 859   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
 860
 861   // StatusAreaWidget uses Shell's CapsLockDelegate.
 862   caps_lock_delegate_.reset(delegate_->CreateCapsLockDelegate());
 863
 864   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
 865   accessibility_delegate_.reset(delegate_->CreateAccessibilityDelegate());
 866   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
 867   media_delegate_.reset(delegate_->CreateMediaDelegate());
 868
 869   if (!command_line->HasSwitch(views::corewm::switches::kNoDropShadows)) {
 870     resize_shadow_controller_.reset(new internal::ResizeShadowController());
 871     shadow_controller_.reset(
 872         new views::corewm::ShadowController(activation_client_));
 873   }
 874
 875   // Create system_tray_notifier_ before the delegate.
 876   system_tray_notifier_.reset(new ash::SystemTrayNotifier());
 877
 878   // Initialize system_tray_delegate_ before initializing StatusAreaWidget.
 879   system_tray_delegate_.reset(delegate()->CreateSystemTrayDelegate());
 880   DCHECK(system_tray_delegate_.get());
 881
 882   locale_notification_controller_.reset(
 883       new internal::LocaleNotificationController);
 884
 885   // Initialize system_tray_delegate_ after StatusAreaWidget is created.
 886   system_tray_delegate_->Initialize();
 887
 888   // TODO(oshima): Initialize all RootWindowControllers once, and
 889   // initialize controller/delegates above when initializing the
 890   // primary root window controller.
 891   internal::RootWindowController::CreateForPrimaryDisplay(
 892       root_window->GetDispatcher());
 893
 894   display_controller_->InitSecondaryDisplays();
 895
 896   // It needs to be created after RootWindowController has been created
 897   // (which calls OnWindowResized has been called, otherwise the
 898   // widget will not paint when restoring after a browser crash.  Also it needs
 899   // to be created after InitSecondaryDisplays() to initialize the wallpapers in
 900   // the correct size.
 901   user_wallpaper_delegate_->InitializeWallpaper();
 902
 903   if (initially_hide_cursor_)
 904     cursor_manager_.HideCursor();
 905   cursor_manager_.SetCursor(ui::kCursorPointer);
 906
 907 #if defined(OS_CHROMEOS)
 908   // Set accelerator controller delegates.
 909   accelerator_controller_->SetBrightnessControlDelegate(
 910       scoped_ptr<ash::BrightnessControlDelegate>(
 911           new ash::system::BrightnessControllerChromeos).Pass());
 912
 913   power_event_observer_.reset(new internal::PowerEventObserver());
 914   user_activity_notifier_.reset(
 915       new internal::UserActivityNotifier(user_activity_detector_.get()));
 916   video_activity_notifier_.reset(
 917       new internal::VideoActivityNotifier(video_detector_.get()));
 918 #endif
 919
 920   weak_display_manager_factory_.reset(
 921       new base::WeakPtrFactory<internal::DisplayManager>(
 922           display_manager_.get()));
 923   // The compositor thread and main message loop have to be running in
 924   // order to create mirror window. Run it after the main message loop
 925   // is started.
 926   base::MessageLoopForUI::current()->PostTask(
 927       FROM_HERE,
 928       base::Bind(&internal::DisplayManager::CreateMirrorWindowIfAny,
 929                  weak_display_manager_factory_->GetWeakPtr()));
 930 }
 931
 932 void Shell::InitKeyboard() {
 933   if (keyboard::IsKeyboardEnabled()) {
 934     if (keyboard_controller_.get()) {
 935       RootWindowControllerList controllers = GetAllRootWindowControllers();
 936       for (RootWindowControllerList::iterator iter = controllers.begin();
 937            iter != controllers.end(); ++iter) {
 938         (*iter)->DeactivateKeyboard(keyboard_controller_.get());
 939       }
 940     }
 941     keyboard::KeyboardControllerProxy* proxy =
 942         delegate_->CreateKeyboardControllerProxy();
 943     keyboard_controller_.reset(
 944         new keyboard::KeyboardController(proxy));
 945   }
 946 }
 947
 948 void Shell::InitRootWindow(aura::Window* root_window) {
 949   DCHECK(activation_client_);
 950   DCHECK(visibility_controller_.get());
 951   DCHECK(drag_drop_controller_.get());
 952   DCHECK(window_cycle_controller_.get());
 953
 954   aura::client::SetFocusClient(root_window, focus_client_.get());
 955   input_method_filter_->SetInputMethodPropertyInRootWindow(root_window);
 956   aura::client::SetActivationClient(root_window, activation_client_);
 957   views::corewm::FocusController* focus_controller =
 958       static_cast<views::corewm::FocusController*>(activation_client_);
 959   root_window->AddPreTargetHandler(focus_controller);
 960   aura::client::SetVisibilityClient(root_window, visibility_controller_.get());
 961   aura::client::SetDragDropClient(root_window, drag_drop_controller_.get());
 962   aura::client::SetScreenPositionClient(root_window,
 963                                         screen_position_controller_.get());
 964   aura::client::SetCursorClient(root_window, &cursor_manager_);
 965   aura::client::SetTooltipClient(root_window, tooltip_controller_.get());
 966   aura::client::SetEventClient(root_window, event_client_.get());
 967
 968   if (nested_dispatcher_controller_) {
 969     aura::client::SetDispatcherClient(root_window,
 970                                       nested_dispatcher_controller_.get());
 971   }
 972   if (user_action_client_)
 973     aura::client::SetUserActionClient(root_window, user_action_client_.get());
 974 }
 975
 976 bool Shell::CanWindowReceiveEvents(aura::Window* window) {
 977   RootWindowControllerList controllers = GetAllRootWindowControllers();
 978   for (RootWindowControllerList::iterator iter = controllers.begin();
 979        iter != controllers.end(); ++iter) {
 980     internal::SystemModalContainerLayoutManager* layout_manager =
 981         (*iter)->GetSystemModalLayoutManager(window);
 982     if (layout_manager && layout_manager->CanWindowReceiveEvents(window))
 983       return true;
 984   }
 985   return false;
 986 }
 987
 988 ////////////////////////////////////////////////////////////////////////////////
 989 // Shell, ui::EventTarget overrides:
 990
 991 bool Shell::CanAcceptEvent(const ui::Event& event) {
 992   return true;
 993 }
 994
 995 ui::EventTarget* Shell::GetParentTarget() {
 996   return aura::Env::GetInstance();
 997 }
 998
 999 void Shell::OnEvent(ui::Event* event) {
1000 }
1001
1002 ////////////////////////////////////////////////////////////////////////////////
1003 // Shell, aura::client::ActivationChangeObserver implementation:
1004
1005 void Shell::OnWindowActivated(aura::Window* gained_active,
1006                               aura::Window* lost_active) {
1007   if (gained_active)
1008     target_root_window_ = gained_active->GetRootWindow();
1009 }
1010
1011 }  // namespace ash