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/desktop_background/desktop_background_controller.h"
  13 #include "ash/desktop_background/desktop_background_resources.h"
  14 #include "ash/desktop_background/desktop_background_view.h"
  15 #include "ash/drag_drop/drag_drop_controller.h"
  16 #include "ash/focus_cycler.h"
  17 #include "ash/high_contrast/high_contrast_controller.h"
  18 #include "ash/launcher/launcher.h"
  19 #include "ash/magnifier/magnification_controller.h"
  20 #include "ash/monitor/monitor_controller.h"
  21 #include "ash/monitor/multi_monitor_manager.h"
  22 #include "ash/screen_ash.h"
  23 #include "ash/shell_context_menu.h"
  24 #include "ash/shell_delegate.h"
  25 #include "ash/shell_factory.h"
  26 #include "ash/shell_window_ids.h"
  27 #include "ash/system/bluetooth/bluetooth_observer.h"
  28 #include "ash/system/network/network_observer.h"
  29 #include "ash/system/tray/system_tray.h"
  30 #include "ash/system/tray/system_tray_delegate.h"
  31 #include "ash/tooltips/tooltip_controller.h"
  32 #include "ash/touch/touch_observer_hud.h"
  33 #include "ash/wm/activation_controller.h"
  34 #include "ash/wm/app_list_controller.h"
  35 #include "ash/wm/base_layout_manager.h"
  36 #include "ash/wm/custom_frame_view_ash.h"
  37 #include "ash/wm/dialog_frame_view.h"
  38 #include "ash/wm/event_client_impl.h"
  39 #include "ash/wm/key_rewriter_event_filter.h"
  40 #include "ash/wm/panel_layout_manager.h"
  41 #include "ash/wm/panel_window_event_filter.h"
  42 #include "ash/wm/partial_screenshot_event_filter.h"
  43 #include "ash/wm/power_button_controller.h"
  44 #include "ash/wm/resize_shadow_controller.h"
  45 #include "ash/wm/root_window_layout_manager.h"
  46 #include "ash/wm/screen_dimmer.h"
  47 #include "ash/wm/shadow_controller.h"
  48 #include "ash/wm/shelf_layout_manager.h"
  49 #include "ash/wm/stacking_controller.h"
  50 #include "ash/wm/status_area_layout_manager.h"
  51 #include "ash/wm/system_gesture_event_filter.h"
  52 #include "ash/wm/system_modal_container_layout_manager.h"
  53 #include "ash/wm/toplevel_window_event_filter.h"
  54 #include "ash/wm/video_detector.h"
  55 #include "ash/wm/visibility_controller.h"
  56 #include "ash/wm/window_cycle_controller.h"
  57 #include "ash/wm/window_modality_controller.h"
  58 #include "ash/wm/window_util.h"
  59 #include "ash/wm/workspace/workspace_event_filter.h"
  60 #include "ash/wm/workspace/workspace_layout_manager.h"
  61 #include "ash/wm/workspace/workspace_manager.h"
  62 #include "ash/wm/workspace_controller.h"
  63 #include "base/bind.h"
  64 #include "base/command_line.h"
  65 #include "grit/ui_resources.h"
  66 #include "third_party/skia/include/core/SkBitmap.h"
  67 #include "ui/aura/client/aura_constants.h"
  68 #include "ui/aura/env.h"
  69 #include "ui/aura/layout_manager.h"
  70 #include "ui/aura/monitor_manager.h"
  71 #include "ui/aura/root_window.h"
  72 #include "ui/aura/shared/input_method_event_filter.h"
  73 #include "ui/aura/shared/root_window_event_filter.h"
  74 #include "ui/aura/ui_controls_aura.h"
  75 #include "ui/aura/window.h"
  76 #include "ui/compositor/layer.h"
  77 #include "ui/compositor/layer_animator.h"
  78 #include "ui/gfx/monitor.h"
  79 #include "ui/gfx/screen.h"
  80 #include "ui/gfx/size.h"
  81 #include "ui/ui_controls/ui_controls.h"
  82 #include "ui/views/focus/focus_manager_factory.h"
  83 #include "ui/views/widget/native_widget_aura.h"
  84 #include "ui/views/widget/widget.h"
  85
  86 #if !defined(OS_MACOSX)
  87 #include "ash/accelerators/accelerator_controller.h"
  88 #include "ash/accelerators/accelerator_filter.h"
  89 #include "ash/accelerators/nested_dispatcher_controller.h"
  90 #endif
  91
  92 namespace ash {
  93
  94 namespace {
  95
  96 using aura::Window;
  97 using views::Widget;
  98
  99 // Creates a new window for use as a container.
 100 aura::Window* CreateContainer(int window_id,
 101                               const char* name,
 102                               aura::Window* parent) {
 103   aura::Window* container = new aura::Window(NULL);
 104   container->set_id(window_id);
 105   container->SetName(name);
 106   container->Init(ui::LAYER_NOT_DRAWN);
 107   parent->AddChild(container);
 108   if (window_id != internal::kShellWindowId_UnparentedControlContainer)
 109     container->Show();
 110   return container;
 111 }
 112
 113 // Creates each of the special window containers that holds windows of various
 114 // types in the shell UI.
 115 void CreateSpecialContainers(aura::RootWindow* root_window) {
 116   // These containers are just used by PowerButtonController to animate groups
 117   // of containers simultaneously without messing up the current transformations
 118   // on those containers.  These are direct children of the root window; all of
 119   // the other containers are their children.
 120   aura::Window* non_lock_screen_containers = CreateContainer(
 121       internal::kShellWindowId_NonLockScreenContainersContainer,
 122       "NonLockScreenContainersContainer",
 123       root_window);
 124   aura::Window* lock_screen_containers = CreateContainer(
 125       internal::kShellWindowId_LockScreenContainersContainer,
 126       "LockScreenContainersContainer",
 127       root_window);
 128   aura::Window* lock_screen_related_containers = CreateContainer(
 129       internal::kShellWindowId_LockScreenRelatedContainersContainer,
 130       "LockScreenRelatedContainersContainer",
 131       root_window);
 132
 133   CreateContainer(internal::kShellWindowId_UnparentedControlContainer,
 134                   "UnparentedControlContainer",
 135                   non_lock_screen_containers);
 136
 137   aura::Window* desktop_background_containers = CreateContainer(
 138       internal::kShellWindowId_DesktopBackgroundContainer,
 139       "DesktopBackgroundContainer",
 140       non_lock_screen_containers);
 141   SetChildWindowVisibilityChangesAnimated(desktop_background_containers);
 142
 143   aura::Window* default_container = CreateContainer(
 144       internal::kShellWindowId_DefaultContainer,
 145       "DefaultContainer",
 146       non_lock_screen_containers);
 147   default_container->SetEventFilter(
 148       new ToplevelWindowEventFilter(default_container));
 149   SetChildWindowVisibilityChangesAnimated(default_container);
 150
 151   aura::Window* always_on_top_container = CreateContainer(
 152       internal::kShellWindowId_AlwaysOnTopContainer,
 153       "AlwaysOnTopContainer",
 154       non_lock_screen_containers);
 155   always_on_top_container->SetEventFilter(
 156       new ToplevelWindowEventFilter(always_on_top_container));
 157   SetChildWindowVisibilityChangesAnimated(always_on_top_container);
 158
 159   CreateContainer(internal::kShellWindowId_PanelContainer,
 160                   "PanelContainer",
 161                   non_lock_screen_containers);
 162
 163   CreateContainer(internal::kShellWindowId_AppListContainer,
 164                   "AppListContainer",
 165                   non_lock_screen_containers);
 166
 167   CreateContainer(internal::kShellWindowId_LauncherContainer,
 168                   "LauncherContainer",
 169                   non_lock_screen_containers);
 170
 171   aura::Window* modal_container = CreateContainer(
 172       internal::kShellWindowId_SystemModalContainer,
 173       "SystemModalContainer",
 174       non_lock_screen_containers);
 175   modal_container->SetEventFilter(
 176       new ToplevelWindowEventFilter(modal_container));
 177   modal_container->SetLayoutManager(
 178       new internal::SystemModalContainerLayoutManager(modal_container));
 179   SetChildWindowVisibilityChangesAnimated(modal_container);
 180
 181   // TODO(beng): Figure out if we can make this use
 182   // SystemModalContainerEventFilter instead of stops_event_propagation.
 183   aura::Window* lock_container = CreateContainer(
 184       internal::kShellWindowId_LockScreenContainer,
 185       "LockScreenContainer",
 186       lock_screen_containers);
 187   lock_container->SetLayoutManager(
 188       new internal::BaseLayoutManager(root_window));
 189   // TODO(beng): stopsevents
 190
 191   aura::Window* lock_modal_container = CreateContainer(
 192       internal::kShellWindowId_LockSystemModalContainer,
 193       "LockSystemModalContainer",
 194       lock_screen_containers);
 195   lock_modal_container->SetEventFilter(
 196       new ToplevelWindowEventFilter(lock_modal_container));
 197   lock_modal_container->SetLayoutManager(
 198       new internal::SystemModalContainerLayoutManager(lock_modal_container));
 199   SetChildWindowVisibilityChangesAnimated(lock_modal_container);
 200
 201   CreateContainer(internal::kShellWindowId_StatusContainer,
 202                   "StatusContainer",
 203                   lock_screen_related_containers);
 204
 205   aura::Window* menu_container = CreateContainer(
 206       internal::kShellWindowId_MenuContainer,
 207       "MenuContainer",
 208       lock_screen_related_containers);
 209   SetChildWindowVisibilityChangesAnimated(menu_container);
 210
 211   aura::Window* drag_drop_container = CreateContainer(
 212       internal::kShellWindowId_DragImageAndTooltipContainer,
 213       "DragImageAndTooltipContainer",
 214       lock_screen_related_containers);
 215   SetChildWindowVisibilityChangesAnimated(drag_drop_container);
 216
 217   aura::Window* settings_bubble_container = CreateContainer(
 218       internal::kShellWindowId_SettingBubbleContainer,
 219       "SettingBubbleContainer",
 220       lock_screen_related_containers);
 221   SetChildWindowVisibilityChangesAnimated(settings_bubble_container);
 222
 223   CreateContainer(internal::kShellWindowId_OverlayContainer,
 224                   "OverlayContainer",
 225                   lock_screen_related_containers);
 226 }
 227
 228 // This dummy class is used for shell unit tests. We dont have chrome delegate
 229 // in these tests.
 230 class DummyUserWallpaperDelegate : public UserWallpaperDelegate {
 231  public:
 232   DummyUserWallpaperDelegate() {}
 233
 234   virtual ~DummyUserWallpaperDelegate() {}
 235
 236   virtual const int GetUserWallpaperIndex() OVERRIDE {
 237     return -1;
 238   }
 239
 240   virtual void OpenSetWallpaperPage() OVERRIDE {
 241   }
 242
 243   virtual bool CanOpenSetWallpaperPage() OVERRIDE {
 244     return false;
 245   }
 246
 247  private:
 248   DISALLOW_COPY_AND_ASSIGN(DummyUserWallpaperDelegate);
 249 };
 250
 251 class DummySystemTrayDelegate : public SystemTrayDelegate {
 252  public:
 253   DummySystemTrayDelegate()
 254       : muted_(false),
 255         wifi_enabled_(true),
 256         cellular_enabled_(true),
 257         bluetooth_enabled_(true),
 258         volume_(0.5),
 259         caps_lock_enabled_(false) {
 260   }
 261
 262   virtual ~DummySystemTrayDelegate() {}
 263
 264  private:
 265   virtual bool GetTrayVisibilityOnStartup() OVERRIDE { return true; }
 266
 267   // Overridden from SystemTrayDelegate:
 268   virtual const std::string GetUserDisplayName() const OVERRIDE {
 269     return "Über tray Über tray Über tray Über tray";
 270   }
 271
 272   virtual const std::string GetUserEmail() const OVERRIDE {
 273     return "über@tray";
 274   }
 275
 276   virtual const SkBitmap& GetUserImage() const OVERRIDE {
 277     return null_image_;
 278   }
 279
 280   virtual user::LoginStatus GetUserLoginStatus() const OVERRIDE {
 281     return user::LOGGED_IN_USER;
 282   }
 283
 284   virtual bool SystemShouldUpgrade() const OVERRIDE {
 285     return true;
 286   }
 287
 288   virtual int GetSystemUpdateIconResource() const OVERRIDE {
 289     return IDR_AURA_UBER_TRAY_UPDATE;
 290   }
 291
 292   virtual base::HourClockType GetHourClockType() const OVERRIDE {
 293     return base::k24HourClock;
 294   }
 295
 296   virtual PowerSupplyStatus GetPowerSupplyStatus() const OVERRIDE {
 297     return PowerSupplyStatus();
 298   }
 299
 300   virtual void RequestStatusUpdate() const OVERRIDE {
 301   }
 302
 303   virtual void ShowSettings() OVERRIDE {
 304   }
 305
 306   virtual void ShowDateSettings() OVERRIDE {
 307   }
 308
 309   virtual void ShowNetworkSettings() OVERRIDE {
 310   }
 311
 312   virtual void ShowBluetoothSettings() OVERRIDE {
 313   }
 314
 315   virtual void ShowDriveSettings() OVERRIDE {
 316   }
 317
 318   virtual void ShowIMESettings() OVERRIDE {
 319   }
 320
 321   virtual void ShowHelp() OVERRIDE {
 322   }
 323
 324   virtual bool IsAudioMuted() const OVERRIDE {
 325     return muted_;
 326   }
 327
 328   virtual void SetAudioMuted(bool muted) OVERRIDE {
 329     muted_ = muted;
 330   }
 331
 332   virtual float GetVolumeLevel() const OVERRIDE {
 333     return volume_;
 334   }
 335
 336   virtual void SetVolumeLevel(float volume) OVERRIDE {
 337     volume_ = volume;
 338   }
 339
 340   virtual bool IsCapsLockOn() const OVERRIDE {
 341     return caps_lock_enabled_;
 342   }
 343
 344   virtual void SetCapsLockEnabled(bool enabled) OVERRIDE {
 345     caps_lock_enabled_ = enabled;
 346   }
 347
 348   virtual bool IsInAccessibilityMode() const OVERRIDE {
 349     return false;
 350   }
 351
 352   virtual void SetEnableSpokenFeedback(bool enable) OVERRIDE {}
 353
 354   virtual void ShutDown() OVERRIDE {}
 355
 356   virtual void SignOut() OVERRIDE {
 357     MessageLoop::current()->Quit();
 358   }
 359
 360   virtual void RequestLockScreen() OVERRIDE {}
 361
 362   virtual void RequestRestart() OVERRIDE {}
 363
 364   virtual void GetAvailableBluetoothDevices(
 365       BluetoothDeviceList* list) OVERRIDE {
 366   }
 367
 368   virtual void ToggleBluetoothConnection(const std::string& address) OVERRIDE {
 369   }
 370
 371   virtual void GetCurrentIME(IMEInfo* info) OVERRIDE {
 372   }
 373
 374   virtual void GetAvailableIMEList(IMEInfoList* list) OVERRIDE {
 375   }
 376
 377   virtual void GetCurrentIMEProperties(IMEPropertyInfoList* list) OVERRIDE {
 378   }
 379
 380   virtual void SwitchIME(const std::string& ime_id) OVERRIDE {
 381   }
 382
 383   virtual void ActivateIMEProperty(const std::string& key) OVERRIDE {
 384   }
 385
 386   virtual void CancelDriveOperation(const FilePath&) OVERRIDE {
 387   }
 388
 389   virtual void GetDriveOperationStatusList(
 390       ash::DriveOperationStatusList*) OVERRIDE {
 391   }
 392
 393   virtual void GetMostRelevantNetworkIcon(NetworkIconInfo* info,
 394                                           bool large) OVERRIDE {
 395   }
 396
 397   virtual void GetAvailableNetworks(
 398       std::vector<NetworkIconInfo>* list) OVERRIDE {
 399   }
 400
 401   virtual void ConnectToNetwork(const std::string& network_id) OVERRIDE {
 402   }
 403
 404   virtual void GetNetworkAddresses(std::string* ip_address,
 405                                    std::string* ethernet_mac_address,
 406                                    std::string* wifi_mac_address) OVERRIDE {
 407     *ip_address = "127.0.0.1";
 408     *ethernet_mac_address = "00:11:22:33:44:55";
 409     *wifi_mac_address = "66:77:88:99:00:11";
 410   }
 411
 412   virtual void RequestNetworkScan() OVERRIDE {
 413   }
 414
 415   virtual void AddBluetoothDevice() OVERRIDE {
 416   }
 417
 418   virtual void ToggleAirplaneMode() OVERRIDE {
 419   }
 420
 421   virtual void ToggleWifi() OVERRIDE {
 422     wifi_enabled_ = !wifi_enabled_;
 423     ash::NetworkObserver* observer =
 424         ash::Shell::GetInstance()->tray()->network_observer();
 425     if (observer) {
 426       ash::NetworkIconInfo info;
 427       observer->OnNetworkRefresh(info);
 428     }
 429   }
 430
 431   virtual void ToggleMobile() OVERRIDE {
 432     cellular_enabled_ = !cellular_enabled_;
 433     ash::NetworkObserver* observer =
 434         ash::Shell::GetInstance()->tray()->network_observer();
 435     if (observer) {
 436       ash::NetworkIconInfo info;
 437       observer->OnNetworkRefresh(info);
 438     }
 439   }
 440
 441   virtual void ToggleBluetooth() OVERRIDE {
 442     bluetooth_enabled_ = !bluetooth_enabled_;
 443     ash::BluetoothObserver* observer =
 444         ash::Shell::GetInstance()->tray()->bluetooth_observer();
 445     if (observer)
 446       observer->OnBluetoothRefresh();
 447   }
 448
 449   virtual void ShowOtherWifi() OVERRIDE {
 450   }
 451
 452   virtual void ShowOtherCellular() OVERRIDE {
 453   }
 454
 455   virtual bool IsNetworkConnected() OVERRIDE {
 456     return true;
 457   }
 458
 459   virtual bool GetWifiAvailable() OVERRIDE {
 460     return true;
 461   }
 462
 463   virtual bool GetMobileAvailable() OVERRIDE {
 464     return true;
 465   }
 466
 467   virtual bool GetBluetoothAvailable() OVERRIDE {
 468     return true;
 469   }
 470
 471   virtual bool GetWifiEnabled() OVERRIDE {
 472     return wifi_enabled_;
 473   }
 474
 475   virtual bool GetMobileEnabled() OVERRIDE {
 476     return cellular_enabled_;
 477   }
 478
 479   virtual bool GetBluetoothEnabled() OVERRIDE {
 480     return bluetooth_enabled_;
 481   }
 482
 483   virtual bool GetMobileScanSupported() OVERRIDE {
 484     return true;
 485   }
 486
 487   virtual bool GetCellularCarrierInfo(std::string* carrier_id,
 488                                       std::string* topup_url,
 489                                       std::string* setup_url) OVERRIDE {
 490     return false;
 491   }
 492
 493   virtual void ShowCellularURL(const std::string& url) OVERRIDE {
 494   }
 495
 496   virtual void ChangeProxySettings() OVERRIDE {
 497   }
 498
 499   bool muted_;
 500   bool wifi_enabled_;
 501   bool cellular_enabled_;
 502   bool bluetooth_enabled_;
 503   float volume_;
 504   bool caps_lock_enabled_;
 505   SkBitmap null_image_;
 506
 507   DISALLOW_COPY_AND_ASSIGN(DummySystemTrayDelegate);
 508 };
 509
 510 }  // namespace
 511
 512 // static
 513 Shell* Shell::instance_ = NULL;
 514 // static
 515 bool Shell::initially_hide_cursor_ = false;
 516
 517 ////////////////////////////////////////////////////////////////////////////////
 518 // Shell::TestApi
 519
 520 Shell::TestApi::TestApi(Shell* shell) : shell_(shell) {}
 521
 522 internal::RootWindowLayoutManager* Shell::TestApi::root_window_layout() {
 523   return shell_->root_window_layout_;
 524 }
 525
 526 aura::shared::InputMethodEventFilter*
 527     Shell::TestApi::input_method_event_filter() {
 528   return shell_->input_method_filter_.get();
 529 }
 530
 531 internal::SystemGestureEventFilter*
 532     Shell::TestApi::system_gesture_event_filter() {
 533   return shell_->system_gesture_filter_.get();
 534 }
 535
 536 internal::WorkspaceController* Shell::TestApi::workspace_controller() {
 537   return shell_->workspace_controller_.get();
 538 }
 539
 540 ////////////////////////////////////////////////////////////////////////////////
 541 // Shell, public:
 542
 543 Shell::Shell(ShellDelegate* delegate)
 544     : root_window_(aura::MonitorManager::CreateRootWindowForPrimaryMonitor()),
 545       screen_(new ScreenAsh(root_window_.get())),
 546       root_filter_(NULL),
 547       delegate_(delegate),
 548       shelf_(NULL),
 549       panel_layout_manager_(NULL),
 550       root_window_layout_(NULL) {
 551   gfx::Screen::SetInstance(screen_);
 552   ui_controls::InstallUIControlsAura(CreateUIControlsAura(root_window_.get()));
 553 }
 554
 555 Shell::~Shell() {
 556   views::FocusManagerFactory::Install(NULL);
 557
 558   RemoveRootWindowEventFilter(key_rewriter_filter_.get());
 559   RemoveRootWindowEventFilter(partial_screenshot_filter_.get());
 560   RemoveRootWindowEventFilter(input_method_filter_.get());
 561   RemoveRootWindowEventFilter(window_modality_controller_.get());
 562   RemoveRootWindowEventFilter(system_gesture_filter_.get());
 563 #if !defined(OS_MACOSX)
 564   RemoveRootWindowEventFilter(accelerator_filter_.get());
 565 #endif
 566   if (touch_observer_hud_.get())
 567     RemoveRootWindowEventFilter(touch_observer_hud_.get());
 568
 569   // Close background widget now so that the focus manager of the
 570   // widget gets deleted in the final message loop run.
 571   root_window_layout_->SetBackgroundWidget(NULL);
 572
 573   // TooltipController is deleted with the Shell so removing its references.
 574   RemoveRootWindowEventFilter(tooltip_controller_.get());
 575   aura::client::SetTooltipClient(GetRootWindow(), NULL);
 576
 577   // Make sure we delete WorkspaceController before launcher is
 578   // deleted as it has a reference to launcher model.
 579   workspace_controller_.reset();
 580
 581   // The system tray needs to be reset before all the windows are destroyed.
 582   tray_.reset();
 583   tray_delegate_.reset();
 584
 585   // Desroy secondary monitor's widgets before all the windows are destroyed.
 586   monitor_controller_.reset();
 587
 588   // Delete containers now so that child windows does not access
 589   // observers when they are destructed.
 590   aura::RootWindow* root_window = GetRootWindow();
 591   while (!root_window->children().empty()) {
 592     aura::Window* child = root_window->children()[0];
 593     delete child;
 594   }
 595
 596   // These need a valid Shell instance to clean up properly, so explicitly
 597   // delete them before invalidating the instance.
 598   // Alphabetical.
 599   activation_controller_.reset();
 600   drag_drop_controller_.reset();
 601   event_client_.reset();
 602   magnification_controller_.reset();
 603   monitor_controller_.reset();
 604   power_button_controller_.reset();
 605   resize_shadow_controller_.reset();
 606   screen_dimmer_.reset();
 607   shadow_controller_.reset();
 608   tooltip_controller_.reset();
 609   window_cycle_controller_.reset();
 610
 611   // Launcher widget has a InputMethodBridge that references to
 612   // input_method_filter_'s input_method_. So explicitly release launcher_
 613   // before input_method_filter_. And this needs to be after we delete all
 614   // containers in case there are still live browser windows which access
 615   // LauncherModel during close.
 616   launcher_.reset();
 617
 618   DCHECK(instance_ == this);
 619   instance_ = NULL;
 620 }
 621
 622 // static
 623 Shell* Shell::CreateInstance(ShellDelegate* delegate) {
 624   CHECK(!instance_);
 625   aura::Env::GetInstance()->SetMonitorManager(
 626       new internal::MultiMonitorManager());
 627   instance_ = new Shell(delegate);
 628   instance_->Init();
 629   return instance_;
 630 }
 631
 632 // static
 633 Shell* Shell::GetInstance() {
 634   DCHECK(instance_);
 635   return instance_;
 636 }
 637
 638 // static
 639 bool Shell::HasInstance() {
 640   return !!instance_;
 641 }
 642
 643 // static
 644 void Shell::DeleteInstance() {
 645   delete instance_;
 646   instance_ = NULL;
 647 }
 648
 649 // static
 650 aura::RootWindow* Shell::GetRootWindow() {
 651   return GetInstance()->root_window_.get();
 652 }
 653
 654 void Shell::Init() {
 655   // Install the custom factory first so that views::FocusManagers for Tray,
 656   // Launcher, and WallPaper could be created by the factory.
 657   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
 658
 659   aura::RootWindow* root_window = GetRootWindow();
 660   root_filter_ = new aura::shared::RootWindowEventFilter(root_window);
 661 #if !defined(OS_MACOSX)
 662   nested_dispatcher_controller_.reset(new NestedDispatcherController);
 663   accelerator_controller_.reset(new AcceleratorController);
 664 #endif
 665   shell_context_menu_.reset(new internal::ShellContextMenu);
 666   // Pass ownership of the filter to the root window.
 667   GetRootWindow()->SetEventFilter(root_filter_);
 668
 669   // KeyRewriterEventFilter must be the first one.
 670   DCHECK(!GetRootWindowEventFilterCount());
 671   key_rewriter_filter_.reset(new internal::KeyRewriterEventFilter);
 672   AddRootWindowEventFilter(key_rewriter_filter_.get());
 673
 674   // PartialScreenshotEventFilter must be the second one to capture key
 675   // events when the taking partial screenshot UI is there.
 676   DCHECK_EQ(1U, GetRootWindowEventFilterCount());
 677   partial_screenshot_filter_.reset(new internal::PartialScreenshotEventFilter);
 678   AddRootWindowEventFilter(partial_screenshot_filter_.get());
 679   AddShellObserver(partial_screenshot_filter_.get());
 680
 681   // InputMethodEventFilter must be the third one. It has to be added before
 682   // AcceleratorFilter.
 683   DCHECK_EQ(2U, GetRootWindowEventFilterCount());
 684   input_method_filter_.reset(
 685       new aura::shared::InputMethodEventFilter(root_window));
 686   AddRootWindowEventFilter(input_method_filter_.get());
 687 #if !defined(OS_MACOSX)
 688   accelerator_filter_.reset(new internal::AcceleratorFilter);
 689   AddRootWindowEventFilter(accelerator_filter_.get());
 690 #endif
 691
 692   system_gesture_filter_.reset(new internal::SystemGestureEventFilter);
 693   AddRootWindowEventFilter(system_gesture_filter_.get());
 694
 695   root_window->SetCursor(ui::kCursorPointer);
 696   if (initially_hide_cursor_)
 697     root_window->ShowCursor(false);
 698
 699   activation_controller_.reset(new internal::ActivationController);
 700
 701   CreateSpecialContainers(root_window);
 702
 703   CommandLine* command_line = CommandLine::ForCurrentProcess();
 704
 705   if (command_line->HasSwitch(switches::kAshTouchHud)) {
 706     touch_observer_hud_.reset(new internal::TouchObserverHUD);
 707     AddRootWindowEventFilter(touch_observer_hud_.get());
 708   }
 709
 710   stacking_controller_.reset(new internal::StackingController);
 711
 712   root_window_layout_ = new internal::RootWindowLayoutManager(root_window);
 713   root_window->SetLayoutManager(root_window_layout_);
 714
 715   event_client_.reset(new internal::EventClientImpl(root_window));
 716
 717   tray_.reset(new SystemTray());
 718   if (delegate_.get())
 719     tray_delegate_.reset(delegate_->CreateSystemTrayDelegate(tray_.get()));
 720   if (!tray_delegate_.get())
 721     tray_delegate_.reset(new DummySystemTrayDelegate());
 722   tray_->CreateItems();
 723   tray_->CreateWidget();
 724
 725   // This controller needs to be set before SetupManagedWindowMode.
 726   desktop_background_controller_.reset(new DesktopBackgroundController);
 727   if (delegate_.get())
 728     user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
 729   if (!user_wallpaper_delegate_.get())
 730     user_wallpaper_delegate_.reset(new DummyUserWallpaperDelegate());
 731
 732   InitLayoutManagers();
 733
 734   if (!command_line->HasSwitch(switches::kAuraNoShadows)) {
 735     resize_shadow_controller_.reset(new internal::ResizeShadowController());
 736     shadow_controller_.reset(new internal::ShadowController());
 737   }
 738
 739   focus_cycler_.reset(new internal::FocusCycler());
 740   focus_cycler_->AddWidget(tray_->widget());
 741
 742   if (!delegate_.get() || delegate_->IsUserLoggedIn())
 743     CreateLauncher();
 744
 745   // Force a layout.
 746   root_window->layout_manager()->OnWindowResized();
 747
 748   // It needs to be created after OnWindowResized has been called, otherwise the
 749   // widget will not paint when restoring after a browser crash.
 750   desktop_background_controller_->SetLoggedInUserWallpaper();
 751
 752   window_modality_controller_.reset(new internal::WindowModalityController);
 753   AddRootWindowEventFilter(window_modality_controller_.get());
 754
 755   visibility_controller_.reset(new internal::VisibilityController);
 756
 757   tooltip_controller_.reset(new internal::TooltipController);
 758   AddRootWindowEventFilter(tooltip_controller_.get());
 759
 760   drag_drop_controller_.reset(new internal::DragDropController);
 761   magnification_controller_.reset(new internal::MagnificationController);
 762   high_contrast_controller_.reset(new HighContrastController);
 763   power_button_controller_.reset(new PowerButtonController);
 764   AddShellObserver(power_button_controller_.get());
 765   video_detector_.reset(new VideoDetector);
 766   window_cycle_controller_.reset(new WindowCycleController);
 767   monitor_controller_.reset(new internal::MonitorController);
 768   screen_dimmer_.reset(new internal::ScreenDimmer);
 769 }
 770
 771 aura::Window* Shell::GetContainer(int container_id) {
 772   return const_cast<aura::Window*>(
 773       const_cast<const Shell*>(this)->GetContainer(container_id));
 774 }
 775
 776 const aura::Window* Shell::GetContainer(int container_id) const {
 777   return GetRootWindow()->GetChildById(container_id);
 778 }
 779
 780 void Shell::AddRootWindowEventFilter(aura::EventFilter* filter) {
 781   static_cast<aura::shared::RootWindowEventFilter*>(
 782       GetRootWindow()->event_filter())->AddFilter(filter);
 783 }
 784
 785 void Shell::RemoveRootWindowEventFilter(aura::EventFilter* filter) {
 786   static_cast<aura::shared::RootWindowEventFilter*>(
 787       GetRootWindow()->event_filter())->RemoveFilter(filter);
 788 }
 789
 790 size_t Shell::GetRootWindowEventFilterCount() const {
 791   return static_cast<aura::shared::RootWindowEventFilter*>(
 792       GetRootWindow()->event_filter())->GetFilterCount();
 793 }
 794
 795 void Shell::ShowBackgroundMenu(views::Widget* widget,
 796                                const gfx::Point& location) {
 797   if (shell_context_menu_.get())
 798     shell_context_menu_->ShowMenu(widget, location);
 799 }
 800
 801 void Shell::ToggleAppList() {
 802   if (!app_list_controller_.get())
 803     app_list_controller_.reset(new internal::AppListController);
 804   app_list_controller_->SetVisible(!app_list_controller_->IsVisible());
 805 }
 806
 807 bool Shell::GetAppListTargetVisibility() const {
 808   return app_list_controller_.get() &&
 809       app_list_controller_->GetTargetVisibility();
 810 }
 811
 812 aura::Window* Shell::GetAppListWindow() {
 813   return app_list_controller_.get() ? app_list_controller_->GetWindow() : NULL;
 814 }
 815
 816 bool Shell::IsScreenLocked() const {
 817   return !delegate_.get() || delegate_->IsScreenLocked();
 818 }
 819
 820 bool Shell::IsModalWindowOpen() const {
 821   const aura::Window* modal_container = GetContainer(
 822       internal::kShellWindowId_SystemModalContainer);
 823   return !modal_container->children().empty();
 824 }
 825
 826 views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
 827     views::Widget* widget) {
 828   if (CommandLine::ForCurrentProcess()->HasSwitch(
 829       switches::kAuraGoogleDialogFrames)) {
 830     return new internal::DialogFrameView;
 831   }
 832   // Use translucent-style window frames for dialogs.
 833   CustomFrameViewAsh* frame_view = new CustomFrameViewAsh;
 834   frame_view->Init(widget);
 835   return frame_view;
 836 }
 837
 838 void Shell::RotateFocus(Direction direction) {
 839   focus_cycler_->RotateFocus(
 840       direction == FORWARD ? internal::FocusCycler::FORWARD :
 841                              internal::FocusCycler::BACKWARD);
 842 }
 843
 844 void Shell::SetMonitorWorkAreaInsets(Window* contains,
 845                                      const gfx::Insets& insets) {
 846   internal::MultiMonitorManager* monitor_manager =
 847       static_cast<internal::MultiMonitorManager*>(
 848           aura::Env::GetInstance()->monitor_manager());
 849   if (!monitor_manager->UpdateWorkAreaOfMonitorNearestWindow(contains, insets))
 850     return;
 851   FOR_EACH_OBSERVER(ShellObserver, observers_,
 852                     OnMonitorWorkAreaInsetsChanged());
 853 }
 854
 855 void Shell::OnLoginStateChanged(user::LoginStatus status) {
 856   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLoginStateChanged(status));
 857 }
 858
 859 void Shell::OnAppTerminating() {
 860   FOR_EACH_OBSERVER(ShellObserver, observers_, OnAppTerminating());
 861 }
 862
 863 void Shell::OnLockStateChanged(bool locked) {
 864   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLockStateChanged(locked));
 865 }
 866
 867 void Shell::CreateLauncher() {
 868   if (launcher_.get())
 869     return;
 870
 871   aura::Window* default_container =
 872       GetContainer(internal::kShellWindowId_DefaultContainer);
 873   launcher_.reset(new Launcher(default_container));
 874
 875   launcher_->SetFocusCycler(focus_cycler_.get());
 876   shelf_->SetLauncher(launcher_.get());
 877   if (panel_layout_manager_)
 878     panel_layout_manager_->SetLauncher(launcher_.get());
 879
 880   launcher_->widget()->Show();
 881 }
 882
 883 void Shell::AddShellObserver(ShellObserver* observer) {
 884   observers_.AddObserver(observer);
 885 }
 886
 887 void Shell::RemoveShellObserver(ShellObserver* observer) {
 888   observers_.RemoveObserver(observer);
 889 }
 890
 891 void Shell::UpdateShelfVisibility() {
 892   shelf_->UpdateVisibilityState();
 893 }
 894
 895 void Shell::SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior) {
 896   shelf_->SetAutoHideBehavior(behavior);
 897 }
 898
 899 ShelfAutoHideBehavior Shell::GetShelfAutoHideBehavior() const {
 900   return shelf_->auto_hide_behavior();
 901 }
 902
 903 void Shell::SetShelfAlignment(ShelfAlignment alignment) {
 904   shelf_->SetAlignment(alignment);
 905 }
 906
 907 ShelfAlignment Shell::GetShelfAlignment() {
 908   return shelf_->alignment();
 909 }
 910
 911 int Shell::GetGridSize() const {
 912   return workspace_controller_->workspace_manager()->grid_size();
 913 }
 914
 915 bool Shell::IsInMaximizedMode() const {
 916   return workspace_controller_->workspace_manager()->IsInMaximizedMode();
 917 }
 918
 919 ////////////////////////////////////////////////////////////////////////////////
 920 // Shell, private:
 921
 922 void Shell::InitLayoutManagers() {
 923   DCHECK(root_window_layout_);
 924   DCHECK(tray_->widget());
 925
 926   internal::ShelfLayoutManager* shelf_layout_manager =
 927       new internal::ShelfLayoutManager(tray_->widget());
 928   GetContainer(internal::kShellWindowId_LauncherContainer)->
 929       SetLayoutManager(shelf_layout_manager);
 930   shelf_ = shelf_layout_manager;
 931
 932   internal::StatusAreaLayoutManager* status_area_layout_manager =
 933       new internal::StatusAreaLayoutManager(shelf_layout_manager);
 934   GetContainer(internal::kShellWindowId_StatusContainer)->
 935       SetLayoutManager(status_area_layout_manager);
 936
 937   aura::Window* default_container =
 938       GetContainer(internal::kShellWindowId_DefaultContainer);
 939   // Workspace manager has its own layout managers.
 940   workspace_controller_.reset(
 941       new internal::WorkspaceController(default_container));
 942   workspace_controller_->workspace_manager()->set_shelf(shelf_layout_manager);
 943   shelf_layout_manager->set_workspace_manager(
 944       workspace_controller_->workspace_manager());
 945
 946   aura::Window* always_on_top_container =
 947       GetContainer(internal::kShellWindowId_AlwaysOnTopContainer);
 948   always_on_top_container->SetLayoutManager(
 949       new internal::BaseLayoutManager(
 950           always_on_top_container->GetRootWindow()));
 951
 952   // Create Panel layout manager
 953   if (CommandLine::ForCurrentProcess()->
 954       HasSwitch(switches::kAuraPanelManager)) {
 955     aura::Window* panel_container = GetContainer(
 956         internal::kShellWindowId_PanelContainer);
 957     panel_layout_manager_ =
 958         new internal::PanelLayoutManager(panel_container);
 959     panel_container->SetEventFilter(
 960         new internal::PanelWindowEventFilter(
 961             panel_container, panel_layout_manager_));
 962     panel_container->SetLayoutManager(panel_layout_manager_);
 963   }
 964 }
 965
 966 void Shell::DisableWorkspaceGridLayout() {
 967   if (workspace_controller_.get())
 968     workspace_controller_->workspace_manager()->set_grid_size(0);
 969 }
 970
 971 }  // namespace ash