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/focus_manager_factory.h"
  11 #include "ash/ash_switches.h"
  12 #include "ash/caps_lock_delegate.h"
  13 #include "ash/desktop_background/desktop_background_controller.h"
  14 #include "ash/desktop_background/desktop_background_view.h"
  15 #include "ash/desktop_background/user_wallpaper_delegate.h"
  16 #include "ash/display/display_controller.h"
  17 #include "ash/display/display_manager.h"
  18 #include "ash/display/event_transformation_handler.h"
  19 #include "ash/display/mirror_window_controller.h"
  20 #include "ash/display/mouse_cursor_event_filter.h"
  21 #include "ash/display/screen_position_controller.h"
  22 #include "ash/drag_drop/drag_drop_controller.h"
  23 #include "ash/focus_cycler.h"
  24 #include "ash/high_contrast/high_contrast_controller.h"
  25 #include "ash/host/root_window_host_factory.h"
  26 #include "ash/launcher/launcher_delegate.h"
  27 #include "ash/launcher/launcher_model.h"
  28 #include "ash/magnifier/magnification_controller.h"
  29 #include "ash/magnifier/partial_magnification_controller.h"
  30 #include "ash/root_window_controller.h"
  31 #include "ash/screen_ash.h"
  32 #include "ash/session_state_delegate.h"
  33 #include "ash/shelf/shelf_layout_manager.h"
  34 #include "ash/shelf/shelf_widget.h"
  35 #include "ash/shell_delegate.h"
  36 #include "ash/shell_factory.h"
  37 #include "ash/shell_window_ids.h"
  38 #include "ash/system/status_area_widget.h"
  39 #include "ash/system/tray/system_tray_delegate.h"
  40 #include "ash/system/tray/system_tray_notifier.h"
  41 #include "ash/wm/activation_controller.h"
  42 #include "ash/wm/always_on_top_controller.h"
  43 #include "ash/wm/app_list_controller.h"
  44 #include "ash/wm/ash_activation_controller.h"
  45 #include "ash/wm/ash_focus_rules.h"
  46 #include "ash/wm/ash_native_cursor_manager.h"
  47 #include "ash/wm/base_layout_manager.h"
  48 #include "ash/wm/capture_controller.h"
  49 #include "ash/wm/coordinate_conversion.h"
  50 #include "ash/wm/custom_frame_view_ash.h"
  51 #include "ash/wm/event_client_impl.h"
  52 #include "ash/wm/event_rewriter_event_filter.h"
  53 #include "ash/wm/lock_state_controller.h"
  54 #include "ash/wm/lock_state_controller_impl2.h"
  55 #include "ash/wm/overlay_event_filter.h"
  56 #include "ash/wm/power_button_controller.h"
  57 #include "ash/wm/property_util.h"
  58 #include "ash/wm/resize_shadow_controller.h"
  59 #include "ash/wm/root_window_layout_manager.h"
  60 #include "ash/wm/screen_dimmer.h"
  61 #include "ash/wm/session_state_controller_impl.h"
  62 #include "ash/wm/system_gesture_event_filter.h"
  63 #include "ash/wm/system_modal_container_event_filter.h"
  64 #include "ash/wm/system_modal_container_layout_manager.h"
  65 #include "ash/wm/user_activity_detector.h"
  66 #include "ash/wm/video_detector.h"
  67 #include "ash/wm/window_animations.h"
  68 #include "ash/wm/window_cycle_controller.h"
  69 #include "ash/wm/window_properties.h"
  70 #include "ash/wm/window_util.h"
  71 #include "ash/wm/workspace_controller.h"
  72 #include "base/bind.h"
  73 #include "base/command_line.h"
  74 #include "base/debug/leak_annotations.h"
  75 #include "ui/aura/client/aura_constants.h"
  76 #include "ui/aura/client/user_action_client.h"
  77 #include "ui/aura/env.h"
  78 #include "ui/aura/focus_manager.h"
  79 #include "ui/aura/layout_manager.h"
  80 #include "ui/aura/root_window.h"
  81 #include "ui/aura/window.h"
  82 #include "ui/base/ui_base_switches.h"
  83 #include "ui/compositor/layer.h"
  84 #include "ui/compositor/layer_animator.h"
  85 #include "ui/gfx/display.h"
  86 #include "ui/gfx/image/image_skia.h"
  87 #include "ui/gfx/screen.h"
  88 #include "ui/gfx/size.h"
  89 #include "ui/keyboard/keyboard.h"
  90 #include "ui/keyboard/keyboard_util.h"
  91 #include "ui/message_center/message_center.h"
  92 #include "ui/views/corewm/compound_event_filter.h"
  93 #include "ui/views/corewm/corewm_switches.h"
  94 #include "ui/views/corewm/focus_controller.h"
  95 #include "ui/views/corewm/input_method_event_filter.h"
  96 #include "ui/views/corewm/shadow_controller.h"
  97 #include "ui/views/corewm/tooltip_controller.h"
  98 #include "ui/views/corewm/visibility_controller.h"
  99 #include "ui/views/corewm/window_modality_controller.h"
 100 #include "ui/views/focus/focus_manager_factory.h"
 101 #include "ui/views/widget/native_widget_aura.h"
 102 #include "ui/views/widget/widget.h"
 103
 104 #if !defined(OS_MACOSX)
 105 #include "ash/accelerators/accelerator_controller.h"
 106 #include "ash/accelerators/accelerator_filter.h"
 107 #include "ash/accelerators/nested_dispatcher_controller.h"
 108 #endif
 109
 110 #if defined(OS_CHROMEOS) && defined(USE_X11)
 111 #include "ash/ash_constants.h"
 112 #include "ash/display/display_change_observer_x11.h"
 113 #include "ash/display/display_error_dialog.h"
 114 #include "ash/display/output_configurator_animation.h"
 115 #include "base/chromeos/chromeos_version.h"
 116 #include "base/message_pump_aurax11.h"
 117 #include "chromeos/display/output_configurator.h"
 118 #include "content/public/browser/gpu_data_manager.h"
 119 #include "content/public/common/content_switches.h"
 120 #include "gpu/config/gpu_feature_type.h"
 121 #endif  // defined(OS_CHROMEOS)
 122
 123 namespace ash {
 124
 125 namespace {
 126
 127 using aura::Window;
 128 using views::Widget;
 129
 130 // This dummy class is used for shell unit tests. We dont have chrome delegate
 131 // in these tests.
 132 class DummyUserWallpaperDelegate : public UserWallpaperDelegate {
 133  public:
 134   DummyUserWallpaperDelegate() {}
 135
 136   virtual ~DummyUserWallpaperDelegate() {}
 137
 138   virtual int GetAnimationType() OVERRIDE {
 139     return views::corewm::WINDOW_VISIBILITY_ANIMATION_TYPE_FADE;
 140   }
 141
 142   virtual bool ShouldShowInitialAnimation() OVERRIDE {
 143     return false;
 144   }
 145
 146   virtual void UpdateWallpaper() OVERRIDE {
 147   }
 148
 149   virtual void InitializeWallpaper() OVERRIDE {
 150     ash::Shell::GetInstance()->desktop_background_controller()->
 151         CreateEmptyWallpaper();
 152   }
 153
 154   virtual void OpenSetWallpaperPage() OVERRIDE {
 155   }
 156
 157   virtual bool CanOpenSetWallpaperPage() OVERRIDE {
 158     return false;
 159   }
 160
 161   virtual void OnWallpaperAnimationFinished() OVERRIDE {
 162   }
 163
 164   virtual void OnWallpaperBootAnimationFinished() OVERRIDE {
 165   }
 166
 167  private:
 168   DISALLOW_COPY_AND_ASSIGN(DummyUserWallpaperDelegate);
 169 };
 170
 171 // A Corewm VisibilityController subclass that calls the Ash animation routine
 172 // so we can pick up our extended animations. See ash/wm/window_animations.h.
 173 class AshVisibilityController : public views::corewm::VisibilityController {
 174  public:
 175   AshVisibilityController() {}
 176   virtual ~AshVisibilityController() {}
 177
 178  private:
 179   // Overridden from views::corewm::VisibilityController:
 180   virtual bool CallAnimateOnChildWindowVisibilityChanged(
 181       aura::Window* window,
 182       bool visible) OVERRIDE {
 183     return AnimateOnChildWindowVisibilityChanged(window, visible);
 184   }
 185
 186   DISALLOW_COPY_AND_ASSIGN(AshVisibilityController);
 187 };
 188
 189 }  // namespace
 190
 191 // static
 192 Shell* Shell::instance_ = NULL;
 193 // static
 194 bool Shell::initially_hide_cursor_ = false;
 195
 196 ////////////////////////////////////////////////////////////////////////////////
 197 // Shell, public:
 198
 199 Shell::Shell(ShellDelegate* delegate)
 200     : screen_(new ScreenAsh),
 201       active_root_window_(NULL),
 202       delegate_(delegate),
 203       activation_client_(NULL),
 204 #if defined(OS_CHROMEOS) && defined(USE_X11)
 205       output_configurator_(new chromeos::OutputConfigurator()),
 206 #endif  // defined(OS_CHROMEOS)
 207       native_cursor_manager_(new AshNativeCursorManager),
 208       cursor_manager_(scoped_ptr<views::corewm::NativeCursorManager>(
 209           native_cursor_manager_)),
 210       browser_context_(NULL),
 211       simulate_modal_window_open_for_testing_(false) {
 212   DCHECK(delegate_.get());
 213   display_manager_.reset(new internal::DisplayManager);
 214   mirror_window_controller_.reset(new internal::MirrorWindowController);
 215
 216   ANNOTATE_LEAKING_OBJECT_PTR(screen_);  // see crbug.com/156466
 217   gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE, screen_);
 218   if (!gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE))
 219     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, screen_);
 220   display_controller_.reset(new DisplayController);
 221 #if defined(OS_CHROMEOS) && defined(USE_X11)
 222   bool is_panel_fitting_disabled =
 223       content::GpuDataManager::GetInstance()->IsFeatureBlacklisted(
 224           gpu::GPU_FEATURE_TYPE_PANEL_FITTING) ||
 225       CommandLine::ForCurrentProcess()->HasSwitch(
 226           ::switches::kDisablePanelFitting);
 227
 228   output_configurator_->Init(
 229       !is_panel_fitting_disabled,
 230       delegate_->IsFirstRunAfterBoot() ? kChromeOsBootColor : 0);
 231
 232   base::MessagePumpAuraX11::Current()->AddDispatcherForRootWindow(
 233       output_configurator());
 234 #endif  // defined(OS_CHROMEOS)
 235   AddPreTargetHandler(this);
 236 }
 237
 238 Shell::~Shell() {
 239   views::FocusManagerFactory::Install(NULL);
 240
 241   // Remove the focus from any window. This will prevent overhead and side
 242   // effects (e.g. crashes) from changing focus during shutdown.
 243   // See bug crbug.com/134502.
 244   if (active_root_window_)
 245     aura::client::GetFocusClient(active_root_window_)->FocusWindow(NULL);
 246
 247   // Please keep in same order as in Init() because it's easy to miss one.
 248   RemovePreTargetHandler(user_activity_detector_.get());
 249   RemovePreTargetHandler(event_rewriter_filter_.get());
 250   RemovePreTargetHandler(overlay_filter_.get());
 251   RemovePreTargetHandler(input_method_filter_.get());
 252   RemovePreTargetHandler(window_modality_controller_.get());
 253   if (mouse_cursor_filter_)
 254     RemovePreTargetHandler(mouse_cursor_filter_.get());
 255   RemovePreTargetHandler(system_gesture_filter_.get());
 256   RemovePreTargetHandler(event_transformation_handler_.get());
 257 #if !defined(OS_MACOSX)
 258   RemovePreTargetHandler(accelerator_filter_.get());
 259 #endif
 260
 261   // TooltipController is deleted with the Shell so removing its references.
 262   RemovePreTargetHandler(tooltip_controller_.get());
 263
 264   // AppList needs to be released before shelf layout manager, which is
 265   // destroyed with launcher container in the loop below. However, app list
 266   // container is now on top of launcher container and released after it.
 267   // TODO(xiyuan): Move it back when app list container is no longer needed.
 268   app_list_controller_.reset();
 269
 270   // Destroy SystemTrayDelegate before destroying the status area(s).
 271   system_tray_delegate_->Shutdown();
 272   system_tray_delegate_.reset();
 273
 274   // Destroy all child windows including widgets.
 275   display_controller_->CloseChildWindows();
 276
 277   // Destroy SystemTrayNotifier after destroying SystemTray as TrayItems
 278   // needs to remove observers from it.
 279   system_tray_notifier_.reset();
 280
 281   // These need a valid Shell instance to clean up properly, so explicitly
 282   // delete them before invalidating the instance.
 283   // Alphabetical. TODO(oshima): sort.
 284   drag_drop_controller_.reset();
 285   magnification_controller_.reset();
 286   partial_magnification_controller_.reset();
 287   resize_shadow_controller_.reset();
 288   shadow_controller_.reset();
 289   tooltip_controller_.reset();
 290   event_client_.reset();
 291   window_cycle_controller_.reset();
 292   capture_controller_.reset();
 293   nested_dispatcher_controller_.reset();
 294   user_action_client_.reset();
 295   visibility_controller_.reset();
 296   launcher_delegate_.reset();
 297   launcher_model_.reset();
 298   video_detector_.reset();
 299
 300   power_button_controller_.reset();
 301   lock_state_controller_.reset();
 302
 303   mirror_window_controller_.reset();
 304
 305   // This also deletes all RootWindows. Note that we invoke Shutdown() on
 306   // DisplayController before resetting |display_controller_|, since destruction
 307   // of its owned RootWindowControllers relies on the value.
 308   display_controller_->Shutdown();
 309   display_controller_.reset();
 310   screen_position_controller_.reset();
 311
 312   // Delete the activation controller after other controllers and launcher
 313   // because they might have registered ActivationChangeObserver.
 314   activation_controller_.reset();
 315
 316 #if defined(OS_CHROMEOS) && defined(USE_X11)
 317    if (display_change_observer_)
 318     output_configurator_->RemoveObserver(display_change_observer_.get());
 319   if (output_configurator_animation_)
 320     output_configurator_->RemoveObserver(output_configurator_animation_.get());
 321   if (display_error_observer_)
 322     output_configurator_->RemoveObserver(display_error_observer_.get());
 323   base::MessagePumpAuraX11::Current()->RemoveDispatcherForRootWindow(
 324       output_configurator());
 325   display_change_observer_.reset();
 326 #endif  // defined(OS_CHROMEOS)
 327
 328   DCHECK(instance_ == this);
 329   instance_ = NULL;
 330 }
 331
 332 // static
 333 Shell* Shell::CreateInstance(ShellDelegate* delegate) {
 334   CHECK(!instance_);
 335   instance_ = new Shell(delegate);
 336   instance_->Init();
 337   return instance_;
 338 }
 339
 340 // static
 341 Shell* Shell::GetInstance() {
 342   DCHECK(instance_);
 343   return instance_;
 344 }
 345
 346 // static
 347 bool Shell::HasInstance() {
 348   return !!instance_;
 349 }
 350
 351 // static
 352 void Shell::DeleteInstance() {
 353   delete instance_;
 354   instance_ = NULL;
 355 }
 356
 357 // static
 358 internal::RootWindowController* Shell::GetPrimaryRootWindowController() {
 359   return GetRootWindowController(GetPrimaryRootWindow());
 360 }
 361
 362 // static
 363 Shell::RootWindowControllerList Shell::GetAllRootWindowControllers() {
 364   return Shell::GetInstance()->display_controller()->
 365       GetAllRootWindowControllers();
 366 }
 367
 368 // static
 369 aura::RootWindow* Shell::GetPrimaryRootWindow() {
 370   return GetInstance()->display_controller()->GetPrimaryRootWindow();
 371 }
 372
 373 // static
 374 aura::RootWindow* Shell::GetActiveRootWindow() {
 375   return GetInstance()->active_root_window_;
 376 }
 377
 378 // static
 379 gfx::Screen* Shell::GetScreen() {
 380   return gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_ALTERNATE);
 381 }
 382
 383 // static
 384 Shell::RootWindowList Shell::GetAllRootWindows() {
 385   return Shell::GetInstance()->display_controller()->
 386       GetAllRootWindows();
 387 }
 388
 389 // static
 390 aura::Window* Shell::GetContainer(aura::RootWindow* root_window,
 391                                   int container_id) {
 392   return root_window->GetChildById(container_id);
 393 }
 394
 395 // static
 396 const aura::Window* Shell::GetContainer(const aura::RootWindow* root_window,
 397                                         int container_id) {
 398   return root_window->GetChildById(container_id);
 399 }
 400
 401 // static
 402 std::vector<aura::Window*> Shell::GetContainersFromAllRootWindows(
 403     int container_id,
 404     aura::RootWindow* priority_root) {
 405   std::vector<aura::Window*> containers;
 406   RootWindowList root_windows = GetAllRootWindows();
 407   for (RootWindowList::const_iterator it = root_windows.begin();
 408        it != root_windows.end(); ++it) {
 409     aura::Window* container = (*it)->GetChildById(container_id);
 410     if (container) {
 411       if (priority_root && priority_root->Contains(container))
 412         containers.insert(containers.begin(), container);
 413       else
 414         containers.push_back(container);
 415     }
 416   }
 417   return containers;
 418 }
 419
 420 // static
 421 bool Shell::IsForcedMaximizeMode() {
 422   CommandLine* command_line = CommandLine::ForCurrentProcess();
 423   return command_line->HasSwitch(switches::kForcedMaximizeMode);
 424 }
 425
 426 void Shell::Init() {
 427   CommandLine* command_line = CommandLine::ForCurrentProcess();
 428
 429   delegate_->PreInit();
 430 #if defined(OS_CHROMEOS) && defined(USE_X11)
 431   output_configurator_animation_.reset(
 432       new internal::OutputConfiguratorAnimation());
 433   output_configurator_->AddObserver(output_configurator_animation_.get());
 434   if (base::chromeos::IsRunningOnChromeOS()) {
 435     display_change_observer_.reset(new internal::DisplayChangeObserverX11);
 436     // Register |display_change_observer_| first so that the rest of
 437     // observer gets invoked after the root windows are configured.
 438     output_configurator_->AddObserver(display_change_observer_.get());
 439     display_error_observer_.reset(new internal::DisplayErrorObserver());
 440     output_configurator_->AddObserver(display_error_observer_.get());
 441     output_configurator_->set_state_controller(display_change_observer_.get());
 442     if (command_line->HasSwitch(ash::switches::kAshEnableSoftwareMirroring))
 443       output_configurator_->set_mirroring_controller(display_manager_.get());
 444     output_configurator_->Start();
 445     display_change_observer_->OnDisplayModeChanged();
 446   }
 447 #endif
 448
 449   // Install the custom factory first so that views::FocusManagers for Tray,
 450   // Launcher, and WallPaper could be created by the factory.
 451   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
 452
 453   env_filter_.reset(new views::corewm::CompoundEventFilter);
 454   AddPreTargetHandler(env_filter_.get());
 455
 456   // Env creates the compositor. Historically it seems to have been implicitly
 457   // initialized first by the ActivationController, but now that FocusController
 458   // no longer does this we need to do it explicitly.
 459   aura::Env::GetInstance();
 460   if (views::corewm::UseFocusController()) {
 461     views::corewm::FocusController* focus_controller =
 462         new views::corewm::FocusController(new wm::AshFocusRules);
 463     focus_client_.reset(focus_controller);
 464     activation_client_ = focus_controller;
 465     activation_client_->AddObserver(this);
 466   } else {
 467     focus_client_.reset(new aura::FocusManager);
 468     activation_controller_.reset(
 469         new internal::ActivationController(
 470             focus_client_.get(),
 471             new internal::AshActivationController));
 472     activation_client_ = activation_controller_.get();
 473     AddPreTargetHandler(activation_controller_.get());
 474   }
 475
 476   focus_cycler_.reset(new internal::FocusCycler());
 477
 478   screen_position_controller_.reset(new internal::ScreenPositionController);
 479   root_window_host_factory_.reset(delegate_->CreateRootWindowHostFactory());
 480
 481   display_controller_->Start();
 482   display_controller_->InitPrimaryDisplay();
 483   aura::RootWindow* root_window = display_controller_->GetPrimaryRootWindow();
 484   active_root_window_ = root_window;
 485
 486   cursor_manager_.SetDisplay(DisplayController::GetPrimaryDisplay());
 487
 488 #if !defined(OS_MACOSX)
 489   nested_dispatcher_controller_.reset(new NestedDispatcherController);
 490   accelerator_controller_.reset(new AcceleratorController);
 491 #endif
 492
 493   // The order in which event filters are added is significant.
 494   user_activity_detector_.reset(new UserActivityDetector);
 495   AddPreTargetHandler(user_activity_detector_.get());
 496
 497   event_rewriter_filter_.reset(new internal::EventRewriterEventFilter);
 498   AddPreTargetHandler(event_rewriter_filter_.get());
 499
 500   overlay_filter_.reset(new internal::OverlayEventFilter);
 501   AddPreTargetHandler(overlay_filter_.get());
 502   AddShellObserver(overlay_filter_.get());
 503
 504   input_method_filter_.reset(new views::corewm::InputMethodEventFilter(
 505                                  root_window->GetAcceleratedWidget()));
 506   AddPreTargetHandler(input_method_filter_.get());
 507
 508 #if !defined(OS_MACOSX)
 509   accelerator_filter_.reset(new internal::AcceleratorFilter);
 510   AddPreTargetHandler(accelerator_filter_.get());
 511 #endif
 512
 513   event_transformation_handler_.reset(new internal::EventTransformationHandler);
 514   AddPreTargetHandler(event_transformation_handler_.get());
 515
 516   system_gesture_filter_.reset(new internal::SystemGestureEventFilter);
 517   AddPreTargetHandler(system_gesture_filter_.get());
 518
 519   capture_controller_.reset(new internal::CaptureController);
 520
 521   // The keyboard system must be initialized before the RootWindowController is
 522   // created.
 523   if (keyboard::IsKeyboardEnabled())
 524     keyboard::InitializeKeyboard();
 525
 526   internal::RootWindowController* root_window_controller =
 527       new internal::RootWindowController(root_window);
 528   root_window_controller->CreateContainers();
 529   root_window_controller->CreateSystemBackground(
 530       delegate_->IsFirstRunAfterBoot());
 531
 532   if (command_line->HasSwitch(ash::switches::kAshDisableNewLockAnimations))
 533     lock_state_controller_.reset(new SessionStateControllerImpl);
 534   else
 535     lock_state_controller_.reset(new LockStateControllerImpl2);
 536   power_button_controller_.reset(new PowerButtonController(
 537       lock_state_controller_.get()));
 538   AddShellObserver(lock_state_controller_.get());
 539
 540   mouse_cursor_filter_.reset(new internal::MouseCursorEventFilter());
 541   AddPreTargetHandler(mouse_cursor_filter_.get());
 542
 543   // Create Controllers that may need root window.
 544   // TODO(oshima): Move as many controllers before creating
 545   // RootWindowController as possible.
 546   visibility_controller_.reset(new AshVisibilityController);
 547   drag_drop_controller_.reset(new internal::DragDropController);
 548   user_action_client_.reset(delegate_->CreateUserActionClient());
 549   window_modality_controller_.reset(
 550       new views::corewm::WindowModalityController);
 551   AddPreTargetHandler(window_modality_controller_.get());
 552
 553   magnification_controller_.reset(
 554       MagnificationController::CreateInstance());
 555
 556   partial_magnification_controller_.reset(
 557       new PartialMagnificationController());
 558
 559   high_contrast_controller_.reset(new HighContrastController);
 560   video_detector_.reset(new VideoDetector);
 561   window_cycle_controller_.reset(new WindowCycleController(activation_client_));
 562
 563   tooltip_controller_.reset(new views::corewm::TooltipController(
 564                                 gfx::SCREEN_TYPE_ALTERNATE));
 565   AddPreTargetHandler(tooltip_controller_.get());
 566
 567   event_client_.reset(new internal::EventClientImpl);
 568
 569   InitRootWindowController(root_window_controller);
 570
 571   // This controller needs to be set before SetupManagedWindowMode.
 572   desktop_background_controller_.reset(new DesktopBackgroundController());
 573   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
 574   if (!user_wallpaper_delegate_)
 575     user_wallpaper_delegate_.reset(new DummyUserWallpaperDelegate());
 576
 577   // StatusAreaWidget uses Shell's CapsLockDelegate.
 578   caps_lock_delegate_.reset(delegate_->CreateCapsLockDelegate());
 579
 580   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
 581
 582   if (!command_line->HasSwitch(views::corewm::switches::kNoDropShadows)) {
 583     resize_shadow_controller_.reset(new internal::ResizeShadowController());
 584     shadow_controller_.reset(
 585         new views::corewm::ShadowController(activation_client_));
 586   }
 587
 588   // Create system_tray_notifier_ before the delegate.
 589   system_tray_notifier_.reset(new ash::SystemTrayNotifier());
 590
 591   // Initialize system_tray_delegate_ before initializing StatusAreaWidget.
 592   system_tray_delegate_.reset(delegate()->CreateSystemTrayDelegate());
 593   if (!system_tray_delegate_)
 594     system_tray_delegate_.reset(SystemTrayDelegate::CreateDummyDelegate());
 595
 596   // Creates StatusAreaWidget.
 597   root_window_controller->InitForPrimaryDisplay();
 598
 599   // Initialize system_tray_delegate_ after StatusAreaWidget is created.
 600   system_tray_delegate_->Initialize();
 601
 602   display_controller_->InitSecondaryDisplays();
 603
 604   // Force Layout
 605   root_window_controller->root_window_layout()->OnWindowResized();
 606
 607   // It needs to be created after OnWindowResized has been called, otherwise the
 608   // widget will not paint when restoring after a browser crash.  Also it needs
 609   // to be created after InitSecondaryDisplays() to initialize the wallpapers in
 610   // the correct size.
 611   user_wallpaper_delegate_->InitializeWallpaper();
 612
 613   if (initially_hide_cursor_)
 614     cursor_manager_.HideCursor();
 615   cursor_manager_.SetCursor(ui::kCursorPointer);
 616
 617   if (!cursor_manager_.IsCursorVisible()) {
 618     // Cursor might have been hidden by something other than chrome.
 619     // Let the first mouse event show the cursor.
 620     env_filter_->set_cursor_hidden_by_filter(true);
 621   }
 622 }
 623
 624 void Shell::ShowContextMenu(const gfx::Point& location_in_screen) {
 625   // No context menus if there is no session with an active user.
 626   if (!session_state_delegate_->NumberOfLoggedInUsers())
 627     return;
 628   // No context menus when screen is locked.
 629   if (session_state_delegate_->IsScreenLocked())
 630     return;
 631
 632   aura::RootWindow* root =
 633       wm::GetRootWindowMatching(gfx::Rect(location_in_screen, gfx::Size()));
 634   // TODO(oshima): The root and root window controller shouldn't be
 635   // NULL even for the out-of-bounds |location_in_screen| (It should
 636   // return the primary root). Investigate why/how this is
 637   // happening. crbug.com/165214.
 638   internal::RootWindowController* rwc = GetRootWindowController(root);
 639   CHECK(rwc) << "root=" << root
 640              << ", location:" << location_in_screen.ToString();
 641   if (rwc)
 642     rwc->ShowContextMenu(location_in_screen);
 643 }
 644
 645 void Shell::ToggleAppList(aura::Window* window) {
 646   // If the context window is not given, show it on the active root window.
 647   if (!window)
 648     window = GetActiveRootWindow();
 649   if (!app_list_controller_)
 650     app_list_controller_.reset(new internal::AppListController);
 651   app_list_controller_->SetVisible(!app_list_controller_->IsVisible(), window);
 652 }
 653
 654 void Shell::SetDragAndDropHostOfCurrentAppList(
 655     app_list::ApplicationDragAndDropHost* drag_and_drop_host) {
 656   if (app_list_controller_.get())
 657     app_list_controller_->SetDragAndDropHostOfCurrentAppList(
 658         drag_and_drop_host);
 659 }
 660
 661 bool Shell::GetAppListTargetVisibility() const {
 662   return app_list_controller_.get() &&
 663       app_list_controller_->GetTargetVisibility();
 664 }
 665
 666 aura::Window* Shell::GetAppListWindow() {
 667   return app_list_controller_.get() ? app_list_controller_->GetWindow() : NULL;
 668 }
 669
 670 bool Shell::IsSystemModalWindowOpen() const {
 671   if (simulate_modal_window_open_for_testing_)
 672     return true;
 673   const std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
 674       internal::kShellWindowId_SystemModalContainer, NULL);
 675   for (std::vector<aura::Window*>::const_iterator cit = containers.begin();
 676        cit != containers.end(); ++cit) {
 677     for (aura::Window::Windows::const_iterator wit = (*cit)->children().begin();
 678          wit != (*cit)->children().end(); ++wit) {
 679       if ((*wit)->GetProperty(aura::client::kModalKey) ==
 680           ui::MODAL_TYPE_SYSTEM && (*wit)->TargetVisibility()) {
 681         return true;
 682       }
 683     }
 684   }
 685   return false;
 686 }
 687
 688 views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
 689     views::Widget* widget) {
 690   // Use translucent-style window frames for dialogs.
 691   CustomFrameViewAsh* frame_view = new CustomFrameViewAsh;
 692   frame_view->Init(widget);
 693   return frame_view;
 694 }
 695
 696 void Shell::RotateFocus(Direction direction) {
 697   focus_cycler_->RotateFocus(
 698       direction == FORWARD ? internal::FocusCycler::FORWARD :
 699                              internal::FocusCycler::BACKWARD);
 700 }
 701
 702 void Shell::SetDisplayWorkAreaInsets(Window* contains,
 703                                      const gfx::Insets& insets) {
 704   if (!display_manager_->UpdateWorkAreaOfDisplayNearestWindow(contains, insets))
 705     return;
 706   FOR_EACH_OBSERVER(ShellObserver, observers_,
 707                     OnDisplayWorkAreaInsetsChanged());
 708 }
 709
 710 void Shell::OnLoginStateChanged(user::LoginStatus status) {
 711   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLoginStateChanged(status));
 712   RootWindowControllerList controllers = GetAllRootWindowControllers();
 713   for (RootWindowControllerList::iterator iter = controllers.begin();
 714        iter != controllers.end(); ++iter)
 715     (*iter)->OnLoginStateChanged(status);
 716 }
 717
 718 void Shell::UpdateAfterLoginStatusChange(user::LoginStatus status) {
 719   RootWindowControllerList controllers = GetAllRootWindowControllers();
 720   for (RootWindowControllerList::iterator iter = controllers.begin();
 721        iter != controllers.end(); ++iter)
 722     (*iter)->UpdateAfterLoginStatusChange(status);
 723 }
 724
 725 void Shell::OnAppTerminating() {
 726   FOR_EACH_OBSERVER(ShellObserver, observers_, OnAppTerminating());
 727 }
 728
 729 void Shell::OnLockStateChanged(bool locked) {
 730   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLockStateChanged(locked));
 731 }
 732
 733 void Shell::CreateLauncher() {
 734   RootWindowControllerList controllers = GetAllRootWindowControllers();
 735   for (RootWindowControllerList::iterator iter = controllers.begin();
 736        iter != controllers.end(); ++iter)
 737     (*iter)->shelf()->CreateLauncher();
 738 }
 739
 740 void Shell::ShowLauncher() {
 741   RootWindowControllerList controllers = GetAllRootWindowControllers();
 742   for (RootWindowControllerList::iterator iter = controllers.begin();
 743        iter != controllers.end(); ++iter)
 744     (*iter)->ShowLauncher();
 745 }
 746
 747 void Shell::AddShellObserver(ShellObserver* observer) {
 748   observers_.AddObserver(observer);
 749 }
 750
 751 void Shell::RemoveShellObserver(ShellObserver* observer) {
 752   observers_.RemoveObserver(observer);
 753 }
 754
 755 void Shell::UpdateShelfVisibility() {
 756   RootWindowControllerList controllers = GetAllRootWindowControllers();
 757   for (RootWindowControllerList::iterator iter = controllers.begin();
 758        iter != controllers.end(); ++iter)
 759     if ((*iter)->shelf())
 760       (*iter)->UpdateShelfVisibility();
 761 }
 762
 763 void Shell::SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior,
 764                                      aura::RootWindow* root_window) {
 765   ash::internal::ShelfLayoutManager::ForLauncher(root_window)->
 766       SetAutoHideBehavior(behavior);
 767 }
 768
 769 ShelfAutoHideBehavior Shell::GetShelfAutoHideBehavior(
 770     aura::RootWindow* root_window) const {
 771   return ash::internal::ShelfLayoutManager::ForLauncher(root_window)->
 772       auto_hide_behavior();
 773 }
 774
 775 void Shell::SetShelfAlignment(ShelfAlignment alignment,
 776                               aura::RootWindow* root_window) {
 777   if (ash::internal::ShelfLayoutManager::ForLauncher(root_window)->
 778       SetAlignment(alignment)) {
 779     FOR_EACH_OBSERVER(
 780         ShellObserver, observers_, OnShelfAlignmentChanged(root_window));
 781   }
 782 }
 783
 784 ShelfAlignment Shell::GetShelfAlignment(aura::RootWindow* root_window) {
 785   return GetRootWindowController(root_window)->
 786       GetShelfLayoutManager()->GetAlignment();
 787 }
 788
 789 void Shell::SetDimming(bool should_dim) {
 790   RootWindowControllerList controllers = GetAllRootWindowControllers();
 791   for (RootWindowControllerList::iterator iter = controllers.begin();
 792        iter != controllers.end(); ++iter)
 793     (*iter)->screen_dimmer()->SetDimming(should_dim);
 794 }
 795
 796 void Shell::CreateModalBackground(aura::Window* window) {
 797   if (!modality_filter_) {
 798     modality_filter_.reset(new internal::SystemModalContainerEventFilter(this));
 799     AddPreTargetHandler(modality_filter_.get());
 800   }
 801   RootWindowControllerList controllers = GetAllRootWindowControllers();
 802   for (RootWindowControllerList::iterator iter = controllers.begin();
 803        iter != controllers.end(); ++iter)
 804     (*iter)->GetSystemModalLayoutManager(window)->CreateModalBackground();
 805 }
 806
 807 void Shell::OnModalWindowRemoved(aura::Window* removed) {
 808   RootWindowControllerList controllers = GetAllRootWindowControllers();
 809   bool activated = false;
 810   for (RootWindowControllerList::iterator iter = controllers.begin();
 811        iter != controllers.end() && !activated; ++iter) {
 812     activated = (*iter)->GetSystemModalLayoutManager(removed)->
 813         ActivateNextModalWindow();
 814   }
 815   if (!activated) {
 816     RemovePreTargetHandler(modality_filter_.get());
 817     modality_filter_.reset();
 818     for (RootWindowControllerList::iterator iter = controllers.begin();
 819          iter != controllers.end(); ++iter)
 820       (*iter)->GetSystemModalLayoutManager(removed)->DestroyModalBackground();
 821   }
 822 }
 823
 824 WebNotificationTray* Shell::GetWebNotificationTray() {
 825   return GetPrimaryRootWindowController()->shelf()->
 826       status_area_widget()->web_notification_tray();
 827 }
 828
 829 bool Shell::HasPrimaryStatusArea() {
 830   ShelfWidget* shelf = GetPrimaryRootWindowController()->shelf();
 831   return shelf && shelf->status_area_widget();
 832 }
 833
 834 SystemTray* Shell::GetPrimarySystemTray() {
 835   return GetPrimaryRootWindowController()->GetSystemTray();
 836 }
 837
 838 LauncherDelegate* Shell::GetLauncherDelegate() {
 839   if (!launcher_delegate_) {
 840     if (!launcher_model_)
 841       launcher_model_.reset(new LauncherModel);
 842     // Attempt to create the Launcher. This may fail if the application is not
 843     // ready to create it yet, in which case the app is responsible for calling
 844     // ash::Shell::CreateLauncher() when ready.
 845     launcher_delegate_.reset(
 846         delegate_->CreateLauncherDelegate(launcher_model_.get()));
 847   }
 848   return launcher_delegate_.get();
 849 }
 850
 851 void Shell::InitRootWindowForSecondaryDisplay(aura::RootWindow* root) {
 852   aura::client::SetFocusClient(root, focus_client_.get());
 853   internal::RootWindowController* controller =
 854       new internal::RootWindowController(root);
 855   controller->CreateContainers();
 856   // Pass false for the |is_first_run_after_boot| parameter so we'll show a
 857   // black background on this display instead of trying to mimic the boot splash
 858   // screen.
 859   controller->CreateSystemBackground(false);
 860   InitRootWindowController(controller);
 861   controller->InitForPrimaryDisplay();
 862   controller->root_window_layout()->OnWindowResized();
 863   desktop_background_controller_->OnRootWindowAdded(root);
 864   high_contrast_controller_->OnRootWindowAdded(root);
 865   root->ShowRootWindow();
 866   // Activate new root for testing.
 867   active_root_window_ = root;
 868 }
 869
 870 void Shell::DoInitialWorkspaceAnimation() {
 871   return GetPrimaryRootWindowController()->workspace_controller()->
 872       DoInitialAnimation();
 873 }
 874
 875 void Shell::InitRootWindowController(
 876     internal::RootWindowController* controller) {
 877   aura::RootWindow* root_window = controller->root_window();
 878   DCHECK(activation_client_);
 879   DCHECK(visibility_controller_.get());
 880   DCHECK(drag_drop_controller_.get());
 881   DCHECK(capture_controller_.get());
 882   DCHECK(window_cycle_controller_.get());
 883
 884   aura::client::SetFocusClient(root_window, focus_client_.get());
 885   input_method_filter_->SetInputMethodPropertyInRootWindow(root_window);
 886   aura::client::SetActivationClient(root_window, activation_client_);
 887   if (views::corewm::UseFocusController()) {
 888     views::corewm::FocusController* controller =
 889         static_cast<views::corewm::FocusController*>(activation_client_);
 890     root_window->AddPreTargetHandler(controller);
 891   }
 892   aura::client::SetVisibilityClient(root_window, visibility_controller_.get());
 893   aura::client::SetDragDropClient(root_window, drag_drop_controller_.get());
 894   aura::client::SetCaptureClient(root_window, capture_controller_.get());
 895   aura::client::SetScreenPositionClient(root_window,
 896                                         screen_position_controller_.get());
 897   aura::client::SetCursorClient(root_window, &cursor_manager_);
 898   aura::client::SetTooltipClient(root_window, tooltip_controller_.get());
 899   aura::client::SetEventClient(root_window, event_client_.get());
 900
 901   if (nested_dispatcher_controller_) {
 902     aura::client::SetDispatcherClient(root_window,
 903                                       nested_dispatcher_controller_.get());
 904   }
 905   if (user_action_client_)
 906     aura::client::SetUserActionClient(root_window, user_action_client_.get());
 907
 908   root_window->SetCursor(ui::kCursorPointer);
 909   controller->InitLayoutManagers();
 910
 911   // TODO(oshima): Move the instance to RootWindowController when
 912   // the extended desktop is enabled by default.
 913   internal::AlwaysOnTopController* always_on_top_controller =
 914       new internal::AlwaysOnTopController;
 915   always_on_top_controller->SetAlwaysOnTopContainer(
 916       root_window->GetChildById(internal::kShellWindowId_AlwaysOnTopContainer));
 917   root_window->SetProperty(internal::kAlwaysOnTopControllerKey,
 918                            always_on_top_controller);
 919   if (GetPrimaryRootWindowController()->GetSystemModalLayoutManager(NULL)->
 920           has_modal_background()) {
 921     controller->GetSystemModalLayoutManager(NULL)->CreateModalBackground();
 922   }
 923
 924   window_cycle_controller_->OnRootWindowAdded(root_window);
 925 }
 926
 927 ////////////////////////////////////////////////////////////////////////////////
 928 // Shell, private:
 929
 930 bool Shell::CanWindowReceiveEvents(aura::Window* window) {
 931   RootWindowControllerList controllers = GetAllRootWindowControllers();
 932   for (RootWindowControllerList::iterator iter = controllers.begin();
 933        iter != controllers.end(); ++iter) {
 934     internal::SystemModalContainerLayoutManager* layout_manager =
 935         (*iter)->GetSystemModalLayoutManager(window);
 936     if (layout_manager && layout_manager->CanWindowReceiveEvents(window))
 937       return true;
 938   }
 939   return false;
 940 }
 941
 942 ////////////////////////////////////////////////////////////////////////////////
 943 // Shell, ui::EventTarget overrides:
 944
 945 bool Shell::CanAcceptEvent(const ui::Event& event) {
 946   return true;
 947 }
 948
 949 ui::EventTarget* Shell::GetParentTarget() {
 950   return NULL;
 951 }
 952
 953 void Shell::OnEvent(ui::Event* event) {
 954 }
 955
 956 ////////////////////////////////////////////////////////////////////////////////
 957 // Shell, aura::client::ActivationChangeObserver implementation:
 958
 959 void Shell::OnWindowActivated(aura::Window* gained_active,
 960                               aura::Window* lost_active) {
 961   if (gained_active)
 962     active_root_window_ = gained_active->GetRootWindow();
 963 }
 964
 965 }  // namespace ash