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
   9 #include "ash/app_list/app_list.h"
  10 #include "ash/ash_switches.h"
  11 #include "ash/desktop_background/desktop_background_controller.h"
  12 #include "ash/desktop_background/desktop_background_resources.h"
  13 #include "ash/desktop_background/desktop_background_view.h"
  14 #include "ash/drag_drop/drag_drop_controller.h"
  15 #include "ash/focus_cycler.h"
  16 #include "ash/ime/input_method_event_filter.h"
  17 #include "ash/launcher/launcher.h"
  18 #include "ash/monitor/multi_monitor_manager.h"
  19 #include "ash/monitor/monitor_controller.h"
  20 #include "ash/screen_ash.h"
  21 #include "ash/shell_delegate.h"
  22 #include "ash/shell_factory.h"
  23 #include "ash/shell_window_ids.h"
  24 #include "ash/system/audio/tray_volume.h"
  25 #include "ash/system/bluetooth/tray_bluetooth.h"
  26 #include "ash/system/brightness/tray_brightness.h"
  27 #include "ash/system/date/tray_date.h"
  28 #include "ash/system/ime/tray_ime.h"
  29 #include "ash/system/network/tray_network.h"
  30 #include "ash/system/power/power_status_observer.h"
  31 #include "ash/system/power/power_supply_status.h"
  32 #include "ash/system/power/tray_power.h"
  33 #include "ash/system/settings/tray_settings.h"
  34 #include "ash/system/tray/system_tray_delegate.h"
  35 #include "ash/system/tray/system_tray.h"
  36 #include "ash/system/tray/tray_empty.h"
  37 #include "ash/system/tray_accessibility.h"
  38 #include "ash/system/tray_caps_lock.h"
  39 #include "ash/system/user/tray_user.h"
  40 #include "ash/tooltips/tooltip_controller.h"
  41 #include "ash/wm/activation_controller.h"
  42 #include "ash/wm/base_layout_manager.h"
  43 #include "ash/wm/custom_frame_view_ash.h"
  44 #include "ash/wm/dialog_frame_view.h"
  45 #include "ash/wm/panel_window_event_filter.h"
  46 #include "ash/wm/panel_layout_manager.h"
  47 #include "ash/wm/partial_screenshot_event_filter.h"
  48 #include "ash/wm/power_button_controller.h"
  49 #include "ash/wm/resize_shadow_controller.h"
  50 #include "ash/wm/root_window_event_filter.h"
  51 #include "ash/wm/root_window_layout_manager.h"
  52 #include "ash/wm/shadow_controller.h"
  53 #include "ash/wm/shelf_layout_manager.h"
  54 #include "ash/wm/stacking_controller.h"
  55 #include "ash/wm/status_area_layout_manager.h"
  56 #include "ash/wm/system_modal_container_layout_manager.h"
  57 #include "ash/wm/toplevel_window_event_filter.h"
  58 #include "ash/wm/video_detector.h"
  59 #include "ash/wm/visibility_controller.h"
  60 #include "ash/wm/window_cycle_controller.h"
  61 #include "ash/wm/window_modality_controller.h"
  62 #include "ash/wm/window_util.h"
  63 #include "ash/wm/workspace_controller.h"
  64 #include "ash/wm/workspace/workspace_event_filter.h"
  65 #include "ash/wm/workspace/workspace_layout_manager.h"
  66 #include "ash/wm/workspace/workspace_manager.h"
  67 #include "base/bind.h"
  68 #include "base/command_line.h"
  69 #include "grit/ui_resources.h"
  70 #include "third_party/skia/include/core/SkBitmap.h"
  71 #include "ui/aura/client/aura_constants.h"
  72 #include "ui/aura/env.h"
  73 #include "ui/aura/layout_manager.h"
  74 #include "ui/aura/monitor.h"
  75 #include "ui/aura/monitor_manager.h"
  76 #include "ui/aura/monitor_manager.h"
  77 #include "ui/aura/root_window.h"
  78 #include "ui/aura/ui_controls_aura.h"
  79 #include "ui/aura/window.h"
  80 #include "ui/gfx/compositor/layer.h"
  81 #include "ui/gfx/compositor/layer_animator.h"
  82 #include "ui/gfx/size.h"
  83 #include "ui/ui_controls/ui_controls.h"
  84 #include "ui/views/widget/native_widget_aura.h"
  85 #include "ui/views/widget/widget.h"
  86
  87 #if !defined(OS_MACOSX)
  88 #include "ash/accelerators/accelerator_controller.h"
  89 #include "ash/accelerators/accelerator_filter.h"
  90 #include "ash/accelerators/nested_dispatcher_controller.h"
  91 #endif
  92
  93 namespace ash {
  94
  95 namespace {
  96
  97 using aura::Window;
  98 using views::Widget;
  99
 100 // Creates a new window for use as a container.
 101 aura::Window* CreateContainer(int window_id,
 102                               const char* name,
 103                               aura::Window* parent) {
 104   aura::Window* container = new aura::Window(NULL);
 105   container->set_id(window_id);
 106   container->SetName(name);
 107   container->Init(ui::Layer::LAYER_NOT_DRAWN);
 108   parent->AddChild(container);
 109   if (window_id != internal::kShellWindowId_UnparentedControlContainer)
 110     container->Show();
 111   return container;
 112 }
 113
 114 // Creates each of the special window containers that holds windows of various
 115 // types in the shell UI.
 116 void CreateSpecialContainers(aura::RootWindow* root_window) {
 117   // These containers are just used by PowerButtonController to animate groups
 118   // of containers simultaneously without messing up the current transformations
 119   // on those containers.  These are direct children of the root window; all of
 120   // the other containers are their children.
 121   aura::Window* non_lock_screen_containers = CreateContainer(
 122       internal::kShellWindowId_NonLockScreenContainersContainer,
 123       "NonLockScreenContainersContainer",
 124       root_window);
 125   aura::Window* lock_screen_containers = CreateContainer(
 126       internal::kShellWindowId_LockScreenContainersContainer,
 127       "LockScreenContainersContainer",
 128       root_window);
 129   aura::Window* lock_screen_related_containers = CreateContainer(
 130       internal::kShellWindowId_LockScreenRelatedContainersContainer,
 131       "LockScreenRelatedContainersContainer",
 132       root_window);
 133
 134   CreateContainer(internal::kShellWindowId_UnparentedControlContainer,
 135                   "UnparentedControlContainer",
 136                   non_lock_screen_containers);
 137
 138   CreateContainer(internal::kShellWindowId_DesktopBackgroundContainer,
 139                   "DesktopBackgroundContainer",
 140                   non_lock_screen_containers);
 141
 142   aura::Window* default_container = CreateContainer(
 143       internal::kShellWindowId_DefaultContainer,
 144       "DefaultContainer",
 145       non_lock_screen_containers);
 146   default_container->SetEventFilter(
 147       new ToplevelWindowEventFilter(default_container));
 148   SetChildWindowVisibilityChangesAnimated(default_container);
 149
 150   aura::Window* always_on_top_container = CreateContainer(
 151       internal::kShellWindowId_AlwaysOnTopContainer,
 152       "AlwaysOnTopContainer",
 153       non_lock_screen_containers);
 154   always_on_top_container->SetEventFilter(
 155       new ToplevelWindowEventFilter(always_on_top_container));
 156   SetChildWindowVisibilityChangesAnimated(always_on_top_container);
 157
 158   aura::Window* panel_container = CreateContainer(
 159       internal::kShellWindowId_PanelContainer,
 160       "PanelContainer",
 161       non_lock_screen_containers);
 162   if (CommandLine::ForCurrentProcess()->
 163       HasSwitch(switches::kAuraPanelManager)) {
 164     internal::PanelLayoutManager* layout_manager =
 165         new internal::PanelLayoutManager(panel_container);
 166     panel_container->SetEventFilter(
 167         new internal::PanelWindowEventFilter(panel_container, layout_manager));
 168     panel_container->SetLayoutManager(layout_manager);
 169   }
 170
 171   CreateContainer(internal::kShellWindowId_LauncherContainer,
 172                   "LauncherContainer",
 173                   non_lock_screen_containers);
 174
 175   aura::Window* modal_container = CreateContainer(
 176       internal::kShellWindowId_SystemModalContainer,
 177       "SystemModalContainer",
 178       non_lock_screen_containers);
 179   modal_container->SetEventFilter(
 180       new ToplevelWindowEventFilter(modal_container));
 181   modal_container->SetLayoutManager(
 182       new internal::SystemModalContainerLayoutManager(modal_container));
 183   SetChildWindowVisibilityChangesAnimated(modal_container);
 184
 185   // TODO(beng): Figure out if we can make this use
 186   // SystemModalContainerEventFilter instead of stops_event_propagation.
 187   aura::Window* lock_container = CreateContainer(
 188       internal::kShellWindowId_LockScreenContainer,
 189       "LockScreenContainer",
 190       lock_screen_containers);
 191   lock_container->SetLayoutManager(
 192       new internal::BaseLayoutManager(root_window));
 193   lock_container->set_stops_event_propagation(true);
 194
 195   aura::Window* lock_modal_container = CreateContainer(
 196       internal::kShellWindowId_LockSystemModalContainer,
 197       "LockSystemModalContainer",
 198       lock_screen_containers);
 199   lock_modal_container->SetEventFilter(
 200       new ToplevelWindowEventFilter(lock_modal_container));
 201   lock_modal_container->SetLayoutManager(
 202       new internal::SystemModalContainerLayoutManager(lock_modal_container));
 203   SetChildWindowVisibilityChangesAnimated(lock_modal_container);
 204
 205   CreateContainer(internal::kShellWindowId_StatusContainer,
 206                   "StatusContainer",
 207                   lock_screen_related_containers);
 208
 209   aura::Window* menu_container = CreateContainer(
 210       internal::kShellWindowId_MenuContainer,
 211       "MenuContainer",
 212       lock_screen_related_containers);
 213   SetChildWindowVisibilityChangesAnimated(menu_container);
 214
 215   aura::Window* drag_drop_container = CreateContainer(
 216       internal::kShellWindowId_DragImageAndTooltipContainer,
 217       "DragImageAndTooltipContainer",
 218       lock_screen_related_containers);
 219   SetChildWindowVisibilityChangesAnimated(drag_drop_container);
 220
 221   aura::Window* settings_bubble_container = CreateContainer(
 222       internal::kShellWindowId_SettingBubbleContainer,
 223       "SettingBubbleContainer",
 224       lock_screen_related_containers);
 225   SetChildWindowVisibilityChangesAnimated(settings_bubble_container);
 226
 227   CreateContainer(internal::kShellWindowId_OverlayContainer,
 228                   "OverlayContainer",
 229                   lock_screen_related_containers);
 230 }
 231
 232 // This dummy class is used for shell unit tests. We dont have chrome delegate
 233 // in these tests.
 234 class DummyUserWallpaperDelegate: public UserWallpaperDelegate {
 235  public:
 236   DummyUserWallpaperDelegate() {}
 237
 238   virtual ~DummyUserWallpaperDelegate() {}
 239
 240   const int GetUserWallpaperIndex() {
 241     return 0;
 242   }
 243
 244  private:
 245    DISALLOW_COPY_AND_ASSIGN(DummyUserWallpaperDelegate);
 246 };
 247
 248 class DummySystemTrayDelegate : public SystemTrayDelegate {
 249  public:
 250   DummySystemTrayDelegate()
 251       : muted_(false),
 252         wifi_enabled_(true),
 253         cellular_enabled_(true),
 254         bluetooth_enabled_(true),
 255         volume_(0.5) {
 256   }
 257
 258   virtual ~DummySystemTrayDelegate() {}
 259
 260  private:
 261
 262   virtual bool GetTrayVisibilityOnStartup() OVERRIDE { return true; }
 263
 264   // Overridden from SystemTrayDelegate:
 265   virtual const std::string GetUserDisplayName() const OVERRIDE {
 266     return "Über tray Über tray Über tray Über tray";
 267   }
 268
 269   virtual const std::string GetUserEmail() const OVERRIDE {
 270     return "über@tray";
 271   }
 272
 273   virtual const SkBitmap& GetUserImage() const OVERRIDE {
 274     return null_image_;
 275   }
 276
 277   virtual user::LoginStatus GetUserLoginStatus() const OVERRIDE {
 278     return user::LOGGED_IN_USER;
 279   }
 280
 281   virtual bool SystemShouldUpgrade() const OVERRIDE {
 282     return true;
 283   }
 284
 285   virtual int GetSystemUpdateIconResource() const OVERRIDE {
 286     return IDR_AURA_UBER_TRAY_UPDATE;
 287   }
 288
 289   virtual base::HourClockType GetHourClockType() const OVERRIDE {
 290     return base::k24HourClock;
 291   }
 292
 293   virtual PowerSupplyStatus GetPowerSupplyStatus() const OVERRIDE {
 294     return PowerSupplyStatus();
 295   }
 296
 297   virtual void ShowSettings() OVERRIDE {
 298   }
 299
 300   virtual void ShowDateSettings() OVERRIDE {
 301   }
 302
 303   virtual void ShowNetworkSettings() OVERRIDE {
 304   }
 305
 306   virtual void ShowBluetoothSettings() OVERRIDE {
 307   }
 308
 309   virtual void ShowIMESettings() OVERRIDE {
 310   }
 311
 312   virtual void ShowHelp() OVERRIDE {
 313   }
 314
 315   virtual bool IsAudioMuted() const OVERRIDE {
 316     return muted_;
 317   }
 318
 319   virtual void SetAudioMuted(bool muted) OVERRIDE {
 320     muted_ = muted;
 321   }
 322
 323   virtual float GetVolumeLevel() const OVERRIDE {
 324     return volume_;
 325   }
 326
 327   virtual void SetVolumeLevel(float volume) OVERRIDE {
 328     volume_ = volume;
 329   }
 330
 331   virtual bool IsCapsLockOn() const OVERRIDE {
 332     return false;
 333   }
 334
 335   virtual bool IsInAccessibilityMode() const OVERRIDE {
 336     return false;
 337   }
 338
 339   virtual void ShutDown() OVERRIDE {}
 340
 341   virtual void SignOut() OVERRIDE {
 342     MessageLoop::current()->Quit();
 343   }
 344
 345   virtual void RequestLockScreen() OVERRIDE {}
 346
 347   virtual void GetAvailableBluetoothDevices(
 348       BluetoothDeviceList* list) OVERRIDE {
 349   }
 350
 351   virtual void ToggleBluetoothConnection(const std::string& address) OVERRIDE {
 352   }
 353
 354   virtual void GetCurrentIME(IMEInfo* info) OVERRIDE {
 355   }
 356
 357   virtual void GetAvailableIMEList(IMEInfoList* list) OVERRIDE {
 358   }
 359
 360   virtual void SwitchIME(const std::string& ime_id) OVERRIDE {
 361   }
 362
 363   virtual void GetMostRelevantNetworkIcon(NetworkIconInfo* info,
 364                                           bool large) OVERRIDE {
 365   }
 366
 367   virtual void GetAvailableNetworks(
 368       std::vector<NetworkIconInfo>* list) OVERRIDE {
 369   }
 370
 371   virtual void ConnectToNetwork(const std::string& network_id) OVERRIDE {
 372   }
 373
 374   virtual void AddBluetoothDevice() OVERRIDE {
 375   }
 376
 377   virtual void ToggleAirplaneMode() OVERRIDE {
 378   }
 379
 380   virtual void ToggleWifi() OVERRIDE {
 381     wifi_enabled_ = !wifi_enabled_;
 382     ash::NetworkObserver* observer =
 383         ash::Shell::GetInstance()->tray()->network_observer();
 384     if (observer) {
 385       ash::NetworkIconInfo info;
 386       observer->OnNetworkRefresh(info);
 387     }
 388   }
 389
 390   virtual void ToggleCellular() OVERRIDE {
 391     cellular_enabled_ = !cellular_enabled_;
 392     ash::NetworkObserver* observer =
 393         ash::Shell::GetInstance()->tray()->network_observer();
 394     if (observer) {
 395       ash::NetworkIconInfo info;
 396       observer->OnNetworkRefresh(info);
 397     }
 398   }
 399
 400   virtual void ToggleBluetooth() OVERRIDE {
 401     bluetooth_enabled_ = !bluetooth_enabled_;
 402     ash::BluetoothObserver* observer =
 403         ash::Shell::GetInstance()->tray()->bluetooth_observer();
 404     if (observer)
 405       observer->OnBluetoothRefresh();
 406   }
 407
 408   virtual bool GetWifiAvailable() OVERRIDE {
 409     return true;
 410   }
 411
 412   virtual bool GetCellularAvailable() OVERRIDE {
 413     return true;
 414   }
 415
 416   virtual bool GetBluetoothAvailable() OVERRIDE {
 417     return true;
 418   }
 419
 420   virtual bool GetWifiEnabled() OVERRIDE {
 421     return wifi_enabled_;
 422   }
 423
 424   virtual bool GetCellularEnabled() OVERRIDE {
 425     return cellular_enabled_;
 426   }
 427
 428   virtual bool GetBluetoothEnabled() OVERRIDE {
 429     return bluetooth_enabled_;
 430   }
 431
 432   virtual void ChangeProxySettings() OVERRIDE {
 433   }
 434
 435   bool muted_;
 436   bool wifi_enabled_;
 437   bool cellular_enabled_;
 438   bool bluetooth_enabled_;
 439   float volume_;
 440   SkBitmap null_image_;
 441
 442   DISALLOW_COPY_AND_ASSIGN(DummySystemTrayDelegate);
 443 };
 444
 445 }  // namespace
 446
 447 // static
 448 Shell* Shell::instance_ = NULL;
 449 // static
 450 bool Shell::initially_hide_cursor_ = false;
 451
 452 ////////////////////////////////////////////////////////////////////////////////
 453 // Shell::TestApi
 454
 455 Shell::TestApi::TestApi(Shell* shell) : shell_(shell) {}
 456
 457 internal::RootWindowLayoutManager* Shell::TestApi::root_window_layout() {
 458   return shell_->root_window_layout_;
 459 }
 460
 461 internal::InputMethodEventFilter* Shell::TestApi::input_method_event_filter() {
 462   return shell_->input_method_filter_.get();
 463 }
 464
 465 internal::WorkspaceController* Shell::TestApi::workspace_controller() {
 466   return shell_->workspace_controller_.get();
 467 }
 468
 469 ////////////////////////////////////////////////////////////////////////////////
 470 // Shell, public:
 471
 472 Shell::Shell(ShellDelegate* delegate)
 473     : root_window_(aura::MonitorManager::CreateRootWindowForPrimaryMonitor()),
 474       screen_(new ScreenAsh(root_window_.get())),
 475       root_filter_(NULL),
 476       delegate_(delegate),
 477       shelf_(NULL),
 478       root_window_layout_(NULL),
 479       status_widget_(NULL) {
 480   gfx::Screen::SetInstance(screen_);
 481   ui_controls::InstallUIControlsAura(CreateUIControlsAura(root_window_.get()));
 482 }
 483
 484 Shell::~Shell() {
 485   RemoveRootWindowEventFilter(partial_screenshot_filter_.get());
 486   RemoveRootWindowEventFilter(input_method_filter_.get());
 487   RemoveRootWindowEventFilter(window_modality_controller_.get());
 488 #if !defined(OS_MACOSX)
 489   RemoveRootWindowEventFilter(accelerator_filter_.get());
 490 #endif
 491
 492   // Close background widget now so that the focus manager of the
 493   // widget gets deleted in the final message loop run.
 494   root_window_layout_->SetBackgroundWidget(NULL);
 495
 496   // TooltipController is deleted with the Shell so removing its references.
 497   RemoveRootWindowEventFilter(tooltip_controller_.get());
 498   aura::client::SetTooltipClient(GetRootWindow(), NULL);
 499
 500   // Make sure we delete WorkspaceController before launcher is
 501   // deleted as it has a reference to launcher model.
 502   workspace_controller_.reset();
 503
 504   // The system tray needs to be reset before all the windows are destroyed.
 505   tray_.reset();
 506
 507   // Delete containers now so that child windows does not access
 508   // observers when they are destructed.
 509   aura::RootWindow* root_window = GetRootWindow();
 510   while (!root_window->children().empty()) {
 511     aura::Window* child = root_window->children()[0];
 512     delete child;
 513   }
 514
 515   // These need a valid Shell instance to clean up properly, so explicitly
 516   // delete them before invalidating the instance.
 517   // Alphabetical.
 518   activation_controller_.reset();
 519   drag_drop_controller_.reset();
 520   resize_shadow_controller_.reset();
 521   shadow_controller_.reset();
 522   window_cycle_controller_.reset();
 523   monitor_controller_.reset();
 524
 525   // Launcher widget has a InputMethodBridge that references to
 526   // input_method_filter_'s input_method_. So explicitly release launcher_
 527   // before input_method_filter_. And this needs to be after we delete all
 528   // containers in case there are still live browser windows which access
 529   // LauncherModel during close.
 530   launcher_.reset();
 531
 532   DCHECK(instance_ == this);
 533   instance_ = NULL;
 534 }
 535
 536 // static
 537 Shell* Shell::CreateInstance(ShellDelegate* delegate) {
 538   CHECK(!instance_);
 539   aura::Env::GetInstance()->SetMonitorManager(
 540       new internal::MultiMonitorManager());
 541   instance_ = new Shell(delegate);
 542   instance_->Init();
 543   return instance_;
 544 }
 545
 546 // static
 547 Shell* Shell::GetInstance() {
 548   DCHECK(instance_);
 549   return instance_;
 550 }
 551
 552 // static
 553 bool Shell::HasInstance() {
 554   return !!instance_;
 555 }
 556
 557 // static
 558 void Shell::DeleteInstance() {
 559   delete instance_;
 560   instance_ = NULL;
 561 }
 562
 563 // static
 564 aura::RootWindow* Shell::GetRootWindow() {
 565   return GetInstance()->root_window_.get();
 566 }
 567
 568 void Shell::Init() {
 569   aura::RootWindow* root_window = GetRootWindow();
 570   root_filter_ = new internal::RootWindowEventFilter(root_window);
 571 #if !defined(OS_MACOSX)
 572   nested_dispatcher_controller_.reset(new NestedDispatcherController);
 573   accelerator_controller_.reset(new AcceleratorController);
 574 #endif
 575   // Pass ownership of the filter to the root window.
 576   GetRootWindow()->SetEventFilter(root_filter_);
 577
 578   DCHECK(!GetRootWindowEventFilterCount());
 579
 580   // PartialScreenshotEventFilter must be the first one to capture key
 581   // events when the taking partial screenshot UI is there.
 582   partial_screenshot_filter_.reset(new internal::PartialScreenshotEventFilter);
 583   AddRootWindowEventFilter(partial_screenshot_filter_.get());
 584
 585   // Then AcceleratorFilter and InputMethodEventFilter must be added (in this
 586   // order) since they have the second highest priority.
 587   DCHECK_EQ(1U, GetRootWindowEventFilterCount());
 588 #if !defined(OS_MACOSX)
 589   accelerator_filter_.reset(new internal::AcceleratorFilter);
 590   AddRootWindowEventFilter(accelerator_filter_.get());
 591   DCHECK_EQ(2U, GetRootWindowEventFilterCount());
 592 #endif
 593   input_method_filter_.reset(new internal::InputMethodEventFilter);
 594   AddRootWindowEventFilter(input_method_filter_.get());
 595
 596   root_window->SetCursor(aura::kCursorPointer);
 597   if (initially_hide_cursor_)
 598     root_window->ShowCursor(false);
 599
 600   activation_controller_.reset(new internal::ActivationController);
 601
 602   CreateSpecialContainers(root_window);
 603
 604   stacking_controller_.reset(new internal::StackingController);
 605
 606   root_window_layout_ = new internal::RootWindowLayoutManager(root_window);
 607   root_window->SetLayoutManager(root_window_layout_);
 608
 609   if (delegate_.get())
 610     status_widget_ = delegate_->CreateStatusArea();
 611
 612   CommandLine* command_line = CommandLine::ForCurrentProcess();
 613   if (!command_line->HasSwitch(switches::kDisableAshUberTray)) {
 614     // TODO(sad): This is rather ugly at the moment. This is because we are
 615     // supporting both the old and the new status bar at the same time. This
 616     // will soon get better once the new one is ready and the old one goes out
 617     // the door.
 618     tray_.reset(new SystemTray());
 619     if (status_widget_) {
 620       status_widget_->GetContentsView()->RemoveAllChildViews(false);
 621       status_widget_->GetContentsView()->AddChildView(tray_.get());
 622     }
 623
 624     if (delegate_.get())
 625       tray_delegate_.reset(delegate_->CreateSystemTrayDelegate(tray_.get()));
 626     if (!tray_delegate_.get())
 627       tray_delegate_.reset(new DummySystemTrayDelegate());
 628
 629     internal::TrayVolume* tray_volume = new internal::TrayVolume();
 630     internal::TrayBluetooth* tray_bluetooth = new internal::TrayBluetooth();
 631     internal::TrayBrightness* tray_brightness = new internal::TrayBrightness();
 632     internal::TrayDate* tray_date = new internal::TrayDate();
 633     internal::TrayPower* tray_power = new internal::TrayPower();
 634     internal::TrayNetwork* tray_network = new internal::TrayNetwork;
 635     internal::TrayUser* tray_user = new internal::TrayUser;
 636     internal::TrayAccessibility* tray_accessibility =
 637         new internal::TrayAccessibility;
 638     internal::TrayCapsLock* tray_caps_lock = new internal::TrayCapsLock;
 639     internal::TrayIME* tray_ime = new internal::TrayIME;
 640
 641     tray_->accessibility_observer_ = tray_accessibility;
 642     tray_->audio_observer_ = tray_volume;
 643     tray_->bluetooth_observer_ = tray_bluetooth;
 644     tray_->brightness_observer_ = tray_brightness;
 645     tray_->caps_lock_observer_ = tray_caps_lock;
 646     tray_->clock_observer_ = tray_date;
 647     tray_->ime_observer_ = tray_ime;
 648     tray_->network_observer_ = tray_network;
 649     tray_->power_status_observer_ = tray_power;
 650     tray_->update_observer_ = tray_user;
 651     tray_->user_observer_ = tray_user;
 652
 653     tray_->AddTrayItem(tray_user);
 654     tray_->AddTrayItem(new internal::TrayEmpty());
 655     tray_->AddTrayItem(tray_power);
 656     tray_->AddTrayItem(tray_network);
 657     tray_->AddTrayItem(tray_bluetooth);
 658     tray_->AddTrayItem(tray_ime);
 659     tray_->AddTrayItem(tray_volume);
 660     tray_->AddTrayItem(tray_brightness);
 661     tray_->AddTrayItem(new internal::TraySettings());
 662     tray_->AddTrayItem(tray_date);
 663     tray_->AddTrayItem(tray_accessibility);
 664     tray_->AddTrayItem(tray_caps_lock);
 665
 666     tray_->SetVisible(tray_delegate_->GetTrayVisibilityOnStartup());
 667   }
 668   if (!status_widget_)
 669     status_widget_ = internal::CreateStatusArea(tray_.get());
 670
 671   // This controller needs to be set before SetupManagedWindowMode.
 672   desktop_background_controller_.reset(new DesktopBackgroundController);
 673   if (delegate_.get())
 674     user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
 675   if (!user_wallpaper_delegate_.get())
 676     user_wallpaper_delegate_.reset(new DummyUserWallpaperDelegate());
 677
 678   InitLayoutManagers();
 679
 680   if (!command_line->HasSwitch(switches::kAuraNoShadows)) {
 681     resize_shadow_controller_.reset(new internal::ResizeShadowController());
 682     shadow_controller_.reset(new internal::ShadowController());
 683   }
 684
 685   focus_cycler_.reset(new internal::FocusCycler());
 686   focus_cycler_->AddWidget(status_widget_);
 687
 688   if (!delegate_.get() || delegate_->CanCreateLauncher())
 689     CreateLauncher();
 690
 691   // Force a layout.
 692   root_window->layout_manager()->OnWindowResized();
 693
 694   window_modality_controller_.reset(new internal::WindowModalityController);
 695   AddRootWindowEventFilter(window_modality_controller_.get());
 696
 697   visibility_controller_.reset(new internal::VisibilityController);
 698
 699   tooltip_controller_.reset(new internal::TooltipController);
 700   AddRootWindowEventFilter(tooltip_controller_.get());
 701
 702   drag_drop_controller_.reset(new internal::DragDropController);
 703   power_button_controller_.reset(new PowerButtonController);
 704   video_detector_.reset(new VideoDetector);
 705   window_cycle_controller_.reset(new WindowCycleController);
 706   monitor_controller_.reset(new internal::MonitorController);
 707 }
 708
 709 aura::Window* Shell::GetContainer(int container_id) {
 710   return const_cast<aura::Window*>(
 711       const_cast<const Shell*>(this)->GetContainer(container_id));
 712 }
 713
 714 const aura::Window* Shell::GetContainer(int container_id) const {
 715   return GetRootWindow()->GetChildById(container_id);
 716 }
 717
 718 void Shell::AddRootWindowEventFilter(aura::EventFilter* filter) {
 719   static_cast<internal::RootWindowEventFilter*>(
 720       GetRootWindow()->event_filter())->AddFilter(filter);
 721 }
 722
 723 void Shell::RemoveRootWindowEventFilter(aura::EventFilter* filter) {
 724   static_cast<internal::RootWindowEventFilter*>(
 725       GetRootWindow()->event_filter())->RemoveFilter(filter);
 726 }
 727
 728 size_t Shell::GetRootWindowEventFilterCount() const {
 729   return static_cast<internal::RootWindowEventFilter*>(
 730       GetRootWindow()->event_filter())->GetFilterCount();
 731 }
 732
 733 void Shell::ShowBackgroundMenu(views::Widget* widget,
 734                                const gfx::Point& location) {
 735   if (workspace_controller_.get())
 736     workspace_controller_->ShowMenu(widget, location);
 737 }
 738
 739 void Shell::ToggleAppList() {
 740   if (!app_list_.get())
 741     app_list_.reset(new internal::AppList);
 742   app_list_->SetVisible(!app_list_->IsVisible());
 743 }
 744
 745 bool Shell::IsScreenLocked() const {
 746   const aura::Window* lock_screen_container = GetContainer(
 747       internal::kShellWindowId_LockScreenContainer);
 748   return lock_screen_container->StopsEventPropagation();
 749 }
 750
 751 bool Shell::IsModalWindowOpen() const {
 752   const aura::Window* modal_container = GetContainer(
 753       internal::kShellWindowId_SystemModalContainer);
 754   return !modal_container->children().empty();
 755 }
 756
 757 views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
 758     views::Widget* widget) {
 759   if (CommandLine::ForCurrentProcess()->HasSwitch(
 760       switches::kAuraGoogleDialogFrames)) {
 761     return new internal::DialogFrameView;
 762   }
 763   // Use translucent-style window frames for dialogs.
 764   CustomFrameViewAsh* frame_view = new CustomFrameViewAsh;
 765   frame_view->Init(widget);
 766   return frame_view;
 767 }
 768
 769 void Shell::RotateFocus(Direction direction) {
 770   focus_cycler_->RotateFocus(
 771       direction == FORWARD ? internal::FocusCycler::FORWARD :
 772                              internal::FocusCycler::BACKWARD);
 773 }
 774
 775 void Shell::SetMonitorWorkAreaInsets(Window* contains,
 776                                      const gfx::Insets& insets) {
 777   aura::Monitor* monitor = aura::Env::GetInstance()->monitor_manager()->
 778       GetMonitorNearestWindow(contains);
 779   if (monitor->work_area_insets() == insets)
 780     return;
 781   monitor->set_work_area_insets(insets);
 782   FOR_EACH_OBSERVER(ShellObserver, observers_,
 783                     OnMonitorWorkAreaInsetsChanged());
 784 }
 785
 786 void Shell::CreateLauncher() {
 787   if (launcher_.get())
 788     return;
 789
 790   aura::Window* default_container =
 791       GetContainer(internal::kShellWindowId_DefaultContainer);
 792   launcher_.reset(new Launcher(default_container));
 793
 794   launcher_->SetFocusCycler(focus_cycler_.get());
 795   shelf_->SetLauncher(launcher_.get());
 796
 797   launcher_->widget()->Show();
 798 }
 799
 800 void Shell::AddShellObserver(ShellObserver* observer) {
 801   observers_.AddObserver(observer);
 802 }
 803
 804 void Shell::RemoveShellObserver(ShellObserver* observer) {
 805   observers_.RemoveObserver(observer);
 806 }
 807
 808 int Shell::GetGridSize() const {
 809   return workspace_controller_->workspace_manager()->grid_size();
 810 }
 811
 812 ////////////////////////////////////////////////////////////////////////////////
 813 // Shell, private:
 814
 815 void Shell::InitLayoutManagers() {
 816   DCHECK(root_window_layout_);
 817   DCHECK(status_widget_);
 818
 819   internal::ShelfLayoutManager* shelf_layout_manager =
 820       new internal::ShelfLayoutManager(status_widget_);
 821   GetContainer(internal::kShellWindowId_LauncherContainer)->
 822       SetLayoutManager(shelf_layout_manager);
 823   shelf_ = shelf_layout_manager;
 824
 825   internal::StatusAreaLayoutManager* status_area_layout_manager =
 826       new internal::StatusAreaLayoutManager(shelf_layout_manager);
 827   GetContainer(internal::kShellWindowId_StatusContainer)->
 828       SetLayoutManager(status_area_layout_manager);
 829
 830   aura::Window* default_container =
 831       GetContainer(internal::kShellWindowId_DefaultContainer);
 832   // Workspace manager has its own layout managers.
 833   workspace_controller_.reset(
 834       new internal::WorkspaceController(default_container));
 835   workspace_controller_->workspace_manager()->set_shelf(shelf_layout_manager);
 836
 837   // Create desktop background widget.
 838   // TODO(bshe): We should be able to use OnDesktopBackgroundChanged function
 839   // here after issue 117244 got fixed.
 840   desktop_background_controller_->SetDesktopBackgroundImageMode(
 841       GetWallpaper(user_wallpaper_delegate_->GetUserWallpaperIndex()));
 842 }
 843
 844 void Shell::DisableWorkspaceGridLayout() {
 845   if (workspace_controller_.get())
 846     workspace_controller_->workspace_manager()->set_grid_size(0);
 847 }
 848
 849 }  // namespace ash