ash/root_window_controller.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/root_window_controller.h"
   6
   7 #include <queue>
   8 #include <vector>
   9
  10 #include "ash/ash_constants.h"
  11 #include "ash/ash_switches.h"
  12 #include "ash/desktop_background/desktop_background_controller.h"
  13 #include "ash/desktop_background/desktop_background_widget_controller.h"
  14 #include "ash/desktop_background/user_wallpaper_delegate.h"
  15 #include "ash/display/display_manager.h"
  16 #include "ash/focus_cycler.h"
  17 #include "ash/high_contrast/high_contrast_controller.h"
  18 #include "ash/host/ash_window_tree_host.h"
  19 #include "ash/root_window_settings.h"
  20 #include "ash/session/session_state_delegate.h"
  21 #include "ash/shelf/shelf_layout_manager.h"
  22 #include "ash/shelf/shelf_types.h"
  23 #include "ash/shelf/shelf_widget.h"
  24 #include "ash/shell.h"
  25 #include "ash/shell_delegate.h"
  26 #include "ash/shell_factory.h"
  27 #include "ash/shell_window_ids.h"
  28 #include "ash/switchable_windows.h"
  29 #include "ash/system/status_area_widget.h"
  30 #include "ash/system/tray/system_tray_delegate.h"
  31 #include "ash/system/tray/system_tray_notifier.h"
  32 #include "ash/touch/touch_hud_debug.h"
  33 #include "ash/touch/touch_hud_projection.h"
  34 #include "ash/touch/touch_observer_hud.h"
  35 #include "ash/wm/always_on_top_controller.h"
  36 #include "ash/wm/dock/docked_window_layout_manager.h"
  37 #include "ash/wm/panels/attached_panel_window_targeter.h"
  38 #include "ash/wm/panels/panel_layout_manager.h"
  39 #include "ash/wm/panels/panel_window_event_handler.h"
  40 #include "ash/wm/root_window_layout_manager.h"
  41 #include "ash/wm/screen_dimmer.h"
  42 #include "ash/wm/stacking_controller.h"
  43 #include "ash/wm/status_area_layout_manager.h"
  44 #include "ash/wm/system_background_controller.h"
  45 #include "ash/wm/system_modal_container_layout_manager.h"
  46 #include "ash/wm/window_properties.h"
  47 #include "ash/wm/window_state.h"
  48 #include "ash/wm/window_util.h"
  49 #include "ash/wm/workspace/workspace_layout_manager.h"
  50 #include "ash/wm/workspace_controller.h"
  51 #include "base/command_line.h"
  52 #include "base/time/time.h"
  53 #include "ui/aura/client/aura_constants.h"
  54 #include "ui/aura/client/screen_position_client.h"
  55 #include "ui/aura/window.h"
  56 #include "ui/aura/window_delegate.h"
  57 #include "ui/aura/window_event_dispatcher.h"
  58 #include "ui/aura/window_observer.h"
  59 #include "ui/aura/window_tracker.h"
  60 #include "ui/base/hit_test.h"
  61 #include "ui/base/models/menu_model.h"
  62 #include "ui/gfx/display.h"
  63 #include "ui/gfx/screen.h"
  64 #include "ui/keyboard/keyboard_controller.h"
  65 #include "ui/keyboard/keyboard_util.h"
  66 #include "ui/views/controls/menu/menu_runner.h"
  67 #include "ui/views/view_model.h"
  68 #include "ui/views/view_model_utils.h"
  69 #include "ui/wm/core/capture_controller.h"
  70 #include "ui/wm/core/easy_resize_window_targeter.h"
  71 #include "ui/wm/core/visibility_controller.h"
  72 #include "ui/wm/core/window_util.h"
  73 #include "ui/wm/public/drag_drop_client.h"
  74 #include "ui/wm/public/tooltip_client.h"
  75 #include "ui/wm/public/window_types.h"
  76
  77 #if defined(OS_CHROMEOS)
  78 #include "ash/system/tray_accessibility.h"
  79 #include "ash/wm/boot_splash_screen_chromeos.h"
  80 #include "ui/chromeos/touch_exploration_controller.h"
  81 #endif
  82
  83 namespace ash {
  84 namespace {
  85
  86 #if defined(OS_CHROMEOS)
  87 // Duration for the animation that hides the boot splash screen, in
  88 // milliseconds.  This should be short enough in relation to
  89 // wm/window_animation.cc's brightness/grayscale fade animation that the login
  90 // background image animation isn't hidden by the splash screen animation.
  91 const int kBootSplashScreenHideDurationMs = 500;
  92 #endif
  93
  94 // Creates a new window for use as a container.
  95 aura::Window* CreateContainer(int window_id,
  96                               const char* name,
  97                               aura::Window* parent) {
  98   aura::Window* container = new aura::Window(NULL);
  99   container->set_id(window_id);
 100   container->SetName(name);
 101   container->Init(aura::WINDOW_LAYER_NOT_DRAWN);
 102   parent->AddChild(container);
 103   if (window_id != kShellWindowId_UnparentedControlContainer)
 104     container->Show();
 105   return container;
 106 }
 107
 108 float ToRelativeValue(int value, int src, int dst) {
 109   return static_cast<float>(value) / static_cast<float>(src) * dst;
 110 }
 111
 112 void MoveOriginRelativeToSize(const gfx::Size& src_size,
 113                                 const gfx::Size& dst_size,
 114                                 gfx::Rect* bounds_in_out) {
 115   gfx::Point origin = bounds_in_out->origin();
 116   bounds_in_out->set_origin(gfx::Point(
 117       ToRelativeValue(origin.x(), src_size.width(), dst_size.width()),
 118       ToRelativeValue(origin.y(), src_size.height(), dst_size.height())));
 119 }
 120
 121 // Reparents |window| to |new_parent|.
 122 void ReparentWindow(aura::Window* window, aura::Window* new_parent) {
 123   const gfx::Size src_size = window->parent()->bounds().size();
 124   const gfx::Size dst_size = new_parent->bounds().size();
 125   // Update the restore bounds to make it relative to the display.
 126   wm::WindowState* state = wm::GetWindowState(window);
 127   gfx::Rect restore_bounds;
 128   bool has_restore_bounds = state->HasRestoreBounds();
 129
 130   bool update_bounds = (state->IsNormalOrSnapped() || state->IsMinimized()) &&
 131                        new_parent->id() != kShellWindowId_DockedContainer;
 132   gfx::Rect local_bounds;
 133   if (update_bounds) {
 134     local_bounds = state->window()->bounds();
 135     MoveOriginRelativeToSize(src_size, dst_size, &local_bounds);
 136   }
 137
 138   if (has_restore_bounds) {
 139     restore_bounds = state->GetRestoreBoundsInParent();
 140     MoveOriginRelativeToSize(src_size, dst_size, &restore_bounds);
 141   }
 142
 143   new_parent->AddChild(window);
 144
 145   // Docked windows have bounds handled by the layout manager in AddChild().
 146   if (update_bounds)
 147     window->SetBounds(local_bounds);
 148
 149   if (has_restore_bounds)
 150     state->SetRestoreBoundsInParent(restore_bounds);
 151 }
 152
 153 // Reparents the appropriate set of windows from |src| to |dst|.
 154 void ReparentAllWindows(aura::Window* src, aura::Window* dst) {
 155   // Set of windows to move.
 156   const int kContainerIdsToMove[] = {
 157       kShellWindowId_DefaultContainer,
 158       kShellWindowId_DockedContainer,
 159       kShellWindowId_PanelContainer,
 160       kShellWindowId_AlwaysOnTopContainer,
 161       kShellWindowId_SystemModalContainer,
 162       kShellWindowId_LockSystemModalContainer,
 163       kShellWindowId_UnparentedControlContainer, };
 164   for (size_t i = 0; i < arraysize(kContainerIdsToMove); i++) {
 165     int id = kContainerIdsToMove[i];
 166     aura::Window* src_container = Shell::GetContainer(src, id);
 167     aura::Window* dst_container = Shell::GetContainer(dst, id);
 168     while (!src_container->children().empty()) {
 169       // Restart iteration from the source container windows each time as they
 170       // may change as a result of moving other windows.
 171       aura::Window::Windows::const_iterator iter =
 172           src_container->children().begin();
 173       while (iter != src_container->children().end() &&
 174              SystemModalContainerLayoutManager::IsModalBackground(*iter)) {
 175         ++iter;
 176       }
 177       // If the entire window list is modal background windows then stop.
 178       if (iter == src_container->children().end())
 179         break;
 180       ReparentWindow(*iter, dst_container);
 181     }
 182   }
 183 }
 184
 185 // Mark the container window so that a widget added to this container will
 186 // use the virtual screeen coordinates instead of parent.
 187 void SetUsesScreenCoordinates(aura::Window* container) {
 188   container->SetProperty(kUsesScreenCoordinatesKey, true);
 189 }
 190
 191 // Mark the container window so that a widget added to this container will
 192 // say in the same root window regardless of the bounds specified.
 193 void DescendantShouldStayInSameRootWindow(aura::Window* container) {
 194   container->SetProperty(kStayInSameRootWindowKey, true);
 195 }
 196
 197 void SetUsesEasyResizeTargeter(aura::Window* container) {
 198   gfx::Insets mouse_extend(-kResizeOutsideBoundsSize,
 199                            -kResizeOutsideBoundsSize,
 200                            -kResizeOutsideBoundsSize,
 201                            -kResizeOutsideBoundsSize);
 202   gfx::Insets touch_extend = mouse_extend.Scale(
 203       kResizeOutsideBoundsScaleForTouch);
 204   container->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
 205       new ::wm::EasyResizeWindowTargeter(container, mouse_extend,
 206                                          touch_extend)));
 207 }
 208
 209 // A window delegate which does nothing. Used to create a window that
 210 // is a event target, but do nothing.
 211 class EmptyWindowDelegate : public aura::WindowDelegate {
 212  public:
 213   EmptyWindowDelegate() {}
 214   virtual ~EmptyWindowDelegate() {}
 215
 216   // aura::WindowDelegate overrides:
 217   virtual gfx::Size GetMinimumSize() const OVERRIDE {
 218     return gfx::Size();
 219   }
 220   virtual gfx::Size GetMaximumSize() const OVERRIDE {
 221     return gfx::Size();
 222   }
 223   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
 224                                const gfx::Rect& new_bounds) OVERRIDE {
 225   }
 226   virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE {
 227     return gfx::kNullCursor;
 228   }
 229   virtual int GetNonClientComponent(
 230       const gfx::Point& point) const OVERRIDE {
 231     return HTNOWHERE;
 232   }
 233   virtual bool ShouldDescendIntoChildForEventHandling(
 234       aura::Window* child,
 235       const gfx::Point& location) OVERRIDE {
 236     return false;
 237   }
 238   virtual bool CanFocus() OVERRIDE {
 239     return false;
 240   }
 241   virtual void OnCaptureLost() OVERRIDE {
 242   }
 243   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
 244   }
 245   virtual void OnDeviceScaleFactorChanged(
 246       float device_scale_factor) OVERRIDE {
 247   }
 248   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {}
 249   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE {
 250     delete this;
 251   }
 252   virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {
 253   }
 254   virtual bool HasHitTestMask() const OVERRIDE {
 255     return false;
 256   }
 257   virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE {}
 258
 259  private:
 260   DISALLOW_COPY_AND_ASSIGN(EmptyWindowDelegate);
 261 };
 262
 263 #if defined(OS_CHROMEOS)
 264 // Responsible for initializing TouchExplorationController when spoken
 265 // feedback is on.
 266 class CrosAccessibilityObserver : public AccessibilityObserver {
 267  public:
 268   explicit CrosAccessibilityObserver(
 269       RootWindowController* root_window_controller)
 270       : root_window_controller_(root_window_controller) {
 271     Shell::GetInstance()->system_tray_notifier()->
 272         AddAccessibilityObserver(this);
 273     UpdateTouchExplorationState();
 274   }
 275
 276   virtual ~CrosAccessibilityObserver() {
 277     SystemTrayNotifier* system_tray_notifier =
 278         Shell::GetInstance()->system_tray_notifier();
 279     if (system_tray_notifier)
 280       system_tray_notifier->RemoveAccessibilityObserver(this);
 281   }
 282
 283  private:
 284   void UpdateTouchExplorationState() {
 285     AccessibilityDelegate* delegate =
 286         Shell::GetInstance()->accessibility_delegate();
 287     bool enabled = delegate->IsSpokenFeedbackEnabled();
 288
 289     if (enabled && !touch_exploration_controller_.get()) {
 290       touch_exploration_controller_.reset(
 291           new ui::TouchExplorationController(
 292               root_window_controller_->GetRootWindow()));
 293     } else if (!enabled) {
 294       touch_exploration_controller_.reset();
 295     }
 296   }
 297
 298   // Overridden from AccessibilityObserver.
 299   virtual void OnAccessibilityModeChanged(
 300       AccessibilityNotificationVisibility notify) OVERRIDE {
 301     UpdateTouchExplorationState();
 302   }
 303
 304   scoped_ptr<ui::TouchExplorationController> touch_exploration_controller_;
 305   RootWindowController* root_window_controller_;
 306
 307   DISALLOW_COPY_AND_ASSIGN(CrosAccessibilityObserver);
 308 };
 309 #endif // OS_CHROMEOS
 310
 311 }  // namespace
 312
 313 void RootWindowController::CreateForPrimaryDisplay(AshWindowTreeHost* host) {
 314   RootWindowController* controller = new RootWindowController(host);
 315   controller->Init(RootWindowController::PRIMARY,
 316                    Shell::GetInstance()->delegate()->IsFirstRunAfterBoot());
 317 }
 318
 319 void RootWindowController::CreateForSecondaryDisplay(AshWindowTreeHost* host) {
 320   RootWindowController* controller = new RootWindowController(host);
 321   controller->Init(RootWindowController::SECONDARY, false /* first run */);
 322 }
 323
 324 void RootWindowController::CreateForVirtualKeyboardDisplay(
 325     AshWindowTreeHost* host) {
 326   RootWindowController* controller = new RootWindowController(host);
 327   controller->Init(RootWindowController::VIRTUAL_KEYBOARD,
 328                    false /* first run */);
 329 }
 330
 331 // static
 332 RootWindowController* RootWindowController::ForShelf(aura::Window* window) {
 333   return GetRootWindowController(window->GetRootWindow());
 334 }
 335
 336 // static
 337 RootWindowController* RootWindowController::ForWindow(
 338     const aura::Window* window) {
 339   return GetRootWindowController(window->GetRootWindow());
 340 }
 341
 342 // static
 343 RootWindowController* RootWindowController::ForTargetRootWindow() {
 344   return GetRootWindowController(Shell::GetTargetRootWindow());
 345 }
 346
 347 // static
 348 aura::Window* RootWindowController::GetContainerForWindow(
 349     aura::Window* window) {
 350   aura::Window* container = window->parent();
 351   while (container && container->type() != ui::wm::WINDOW_TYPE_UNKNOWN)
 352     container = container->parent();
 353   return container;
 354 }
 355
 356 RootWindowController::~RootWindowController() {
 357   Shutdown();
 358   ash_host_.reset();
 359   // The CaptureClient needs to be around for as long as the RootWindow is
 360   // valid.
 361   capture_client_.reset();
 362 }
 363
 364 aura::WindowTreeHost* RootWindowController::GetHost() {
 365   return ash_host_->AsWindowTreeHost();
 366 }
 367
 368 const aura::WindowTreeHost* RootWindowController::GetHost() const {
 369   return ash_host_->AsWindowTreeHost();
 370 }
 371
 372 aura::Window* RootWindowController::GetRootWindow() {
 373   return GetHost()->window();
 374 }
 375
 376 const aura::Window* RootWindowController::GetRootWindow() const {
 377   return GetHost()->window();
 378 }
 379
 380 void RootWindowController::SetWallpaperController(
 381     DesktopBackgroundWidgetController* controller) {
 382   wallpaper_controller_.reset(controller);
 383 }
 384
 385 void RootWindowController::SetAnimatingWallpaperController(
 386     AnimatingDesktopController* controller) {
 387   if (animating_wallpaper_controller_.get())
 388     animating_wallpaper_controller_->StopAnimating();
 389   animating_wallpaper_controller_.reset(controller);
 390 }
 391
 392 void RootWindowController::Shutdown() {
 393   Shell* shell = Shell::GetInstance();
 394   shell->RemoveShellObserver(this);
 395
 396 #if defined(OS_CHROMEOS)
 397   if (cros_accessibility_observer_) {
 398     cros_accessibility_observer_.reset();
 399   }
 400 #endif
 401
 402   if (animating_wallpaper_controller_.get())
 403     animating_wallpaper_controller_->StopAnimating();
 404   wallpaper_controller_.reset();
 405   animating_wallpaper_controller_.reset();
 406   aura::Window* root_window = GetRootWindow();
 407   // Change the target root window before closing child windows. If any child
 408   // being removed triggers a relayout of the shelf it will try to build a
 409   // window list adding windows from the target root window's containers which
 410   // may have already gone away.
 411   if (Shell::GetTargetRootWindow() == root_window) {
 412     shell->set_target_root_window(
 413         Shell::GetPrimaryRootWindow() == root_window
 414             ? NULL
 415             : Shell::GetPrimaryRootWindow());
 416   }
 417
 418   CloseChildWindows();
 419   GetRootWindowSettings(root_window)->controller = NULL;
 420   screen_dimmer_.reset();
 421   workspace_controller_.reset();
 422   // Forget with the display ID so that display lookup
 423   // ends up with invalid display.
 424   GetRootWindowSettings(root_window)->display_id =
 425       gfx::Display::kInvalidDisplayID;
 426   ash_host_->PrepareForShutdown();
 427
 428   system_background_.reset();
 429   aura::client::SetScreenPositionClient(root_window, NULL);
 430 }
 431
 432 SystemModalContainerLayoutManager*
 433 RootWindowController::GetSystemModalLayoutManager(aura::Window* window) {
 434   aura::Window* modal_container = NULL;
 435   if (window) {
 436     aura::Window* window_container = GetContainerForWindow(window);
 437     if (window_container &&
 438         window_container->id() >= kShellWindowId_LockScreenContainer) {
 439       modal_container = GetContainer(kShellWindowId_LockSystemModalContainer);
 440     } else {
 441       modal_container = GetContainer(kShellWindowId_SystemModalContainer);
 442     }
 443   } else {
 444     int modal_window_id = Shell::GetInstance()->session_state_delegate()
 445         ->IsUserSessionBlocked() ? kShellWindowId_LockSystemModalContainer :
 446                                    kShellWindowId_SystemModalContainer;
 447     modal_container = GetContainer(modal_window_id);
 448   }
 449   return modal_container ? static_cast<SystemModalContainerLayoutManager*>(
 450       modal_container->layout_manager()) : NULL;
 451 }
 452
 453 aura::Window* RootWindowController::GetContainer(int container_id) {
 454   return GetRootWindow()->GetChildById(container_id);
 455 }
 456
 457 const aura::Window* RootWindowController::GetContainer(int container_id) const {
 458   return ash_host_->AsWindowTreeHost()->window()->GetChildById(container_id);
 459 }
 460
 461 void RootWindowController::ShowShelf() {
 462   if (!shelf_->shelf())
 463     return;
 464   shelf_->shelf()->SetVisible(true);
 465   shelf_->status_area_widget()->Show();
 466 }
 467
 468 void RootWindowController::OnShelfCreated() {
 469   if (panel_layout_manager_)
 470     panel_layout_manager_->SetShelf(shelf_->shelf());
 471   if (docked_layout_manager_) {
 472     docked_layout_manager_->SetShelf(shelf_->shelf());
 473     if (shelf_->shelf_layout_manager())
 474       docked_layout_manager_->AddObserver(shelf_->shelf_layout_manager());
 475   }
 476
 477   // Notify shell observers that the shelf has been created.
 478   Shell::GetInstance()->OnShelfCreatedForRootWindow(GetRootWindow());
 479 }
 480
 481 void RootWindowController::UpdateAfterLoginStatusChange(
 482     user::LoginStatus status) {
 483   if (status != user::LOGGED_IN_NONE)
 484     mouse_event_target_.reset();
 485   if (shelf_->status_area_widget())
 486     shelf_->status_area_widget()->UpdateAfterLoginStatusChange(status);
 487 }
 488
 489 void RootWindowController::HandleInitialDesktopBackgroundAnimationStarted() {
 490 #if defined(OS_CHROMEOS)
 491   if (CommandLine::ForCurrentProcess()->HasSwitch(
 492           switches::kAshAnimateFromBootSplashScreen) &&
 493       boot_splash_screen_.get()) {
 494     // Make the splash screen fade out so it doesn't obscure the desktop
 495     // wallpaper's brightness/grayscale animation.
 496     boot_splash_screen_->StartHideAnimation(
 497         base::TimeDelta::FromMilliseconds(kBootSplashScreenHideDurationMs));
 498   }
 499 #endif
 500 }
 501
 502 void RootWindowController::OnWallpaperAnimationFinished(views::Widget* widget) {
 503   // Make sure the wallpaper is visible.
 504   system_background_->SetColor(SK_ColorBLACK);
 505 #if defined(OS_CHROMEOS)
 506   boot_splash_screen_.reset();
 507 #endif
 508
 509   Shell::GetInstance()->user_wallpaper_delegate()->
 510       OnWallpaperAnimationFinished();
 511   // Only removes old component when wallpaper animation finished. If we
 512   // remove the old one before the new wallpaper is done fading in there will
 513   // be a white flash during the animation.
 514   if (animating_wallpaper_controller()) {
 515     DesktopBackgroundWidgetController* controller =
 516         animating_wallpaper_controller()->GetController(true);
 517     // |desktop_widget_| should be the same animating widget we try to move
 518     // to |kDesktopController|. Otherwise, we may close |desktop_widget_|
 519     // before move it to |kDesktopController|.
 520     DCHECK_EQ(controller->widget(), widget);
 521     // Release the old controller and close its background widget.
 522     SetWallpaperController(controller);
 523   }
 524 }
 525
 526 void RootWindowController::CloseChildWindows() {
 527   mouse_event_target_.reset();
 528
 529   // Deactivate keyboard container before closing child windows and shutting
 530   // down associated layout managers.
 531   DeactivateKeyboard(keyboard::KeyboardController::GetInstance());
 532
 533   // panel_layout_manager_ needs to be shut down before windows are destroyed.
 534   if (panel_layout_manager_) {
 535     panel_layout_manager_->Shutdown();
 536     panel_layout_manager_ = NULL;
 537   }
 538   // docked_layout_manager_ needs to be shut down before windows are destroyed.
 539   if (docked_layout_manager_) {
 540     if (shelf_ && shelf_->shelf_layout_manager())
 541       docked_layout_manager_->RemoveObserver(shelf_->shelf_layout_manager());
 542     docked_layout_manager_->Shutdown();
 543     docked_layout_manager_ = NULL;
 544   }
 545   aura::Window* root_window = GetRootWindow();
 546   aura::client::SetDragDropClient(root_window, NULL);
 547
 548   // TODO(harrym): Remove when Status Area Widget is a child view.
 549   if (shelf_) {
 550     shelf_->ShutdownStatusAreaWidget();
 551
 552     if (shelf_->shelf_layout_manager())
 553       shelf_->shelf_layout_manager()->PrepareForShutdown();
 554   }
 555
 556   // Close background widget first as it depends on tooltip.
 557   wallpaper_controller_.reset();
 558   animating_wallpaper_controller_.reset();
 559
 560   workspace_controller_.reset();
 561   aura::client::SetTooltipClient(root_window, NULL);
 562
 563   // Explicitly destroy top level windows. We do this as during part of
 564   // destruction such windows may query the RootWindow for state.
 565   std::queue<aura::Window*> non_toplevel_windows;
 566   non_toplevel_windows.push(root_window);
 567   while (!non_toplevel_windows.empty()) {
 568     aura::Window* non_toplevel_window = non_toplevel_windows.front();
 569     non_toplevel_windows.pop();
 570     aura::WindowTracker toplevel_windows;
 571     for (size_t i = 0; i < non_toplevel_window->children().size(); ++i) {
 572       aura::Window* child = non_toplevel_window->children()[i];
 573       if (!child->owned_by_parent())
 574         continue;
 575       if (child->delegate())
 576         toplevel_windows.Add(child);
 577       else
 578         non_toplevel_windows.push(child);
 579     }
 580     while (!toplevel_windows.windows().empty())
 581       delete *toplevel_windows.windows().begin();
 582   }
 583   // And then remove the containers.
 584   while (!root_window->children().empty()) {
 585     aura::Window* window = root_window->children()[0];
 586     if (window->owned_by_parent()) {
 587       delete window;
 588     } else {
 589       root_window->RemoveChild(window);
 590     }
 591   }
 592
 593   shelf_.reset();
 594 }
 595
 596 void RootWindowController::MoveWindowsTo(aura::Window* dst) {
 597   // Forget the shelf early so that shelf don't update itself using wrong
 598   // display info.
 599   workspace_controller_->SetShelf(NULL);
 600   ReparentAllWindows(GetRootWindow(), dst);
 601 }
 602
 603 ShelfLayoutManager* RootWindowController::GetShelfLayoutManager() {
 604   return shelf_->shelf_layout_manager();
 605 }
 606
 607 SystemTray* RootWindowController::GetSystemTray() {
 608   // We assume in throughout the code that this will not return NULL. If code
 609   // triggers this for valid reasons, it should test status_area_widget first.
 610   CHECK(shelf_->status_area_widget());
 611   return shelf_->status_area_widget()->system_tray();
 612 }
 613
 614 void RootWindowController::ShowContextMenu(const gfx::Point& location_in_screen,
 615                                            ui::MenuSourceType source_type) {
 616   DCHECK(Shell::GetInstance()->delegate());
 617   scoped_ptr<ui::MenuModel> menu_model(
 618       Shell::GetInstance()->delegate()->CreateContextMenu(
 619           GetRootWindow(), NULL, NULL));
 620   if (!menu_model)
 621     return;
 622
 623   // Background controller may not be set yet if user clicked on status are
 624   // before initial animation completion. See crbug.com/222218
 625   if (!wallpaper_controller_.get())
 626     return;
 627
 628   views::MenuRunner menu_runner(menu_model.get());
 629   if (menu_runner.RunMenuAt(wallpaper_controller_->widget(),
 630                             NULL,
 631                             gfx::Rect(location_in_screen, gfx::Size()),
 632                             views::MENU_ANCHOR_TOPLEFT,
 633                             source_type,
 634                             views::MenuRunner::CONTEXT_MENU) ==
 635       views::MenuRunner::MENU_DELETED) {
 636     return;
 637   }
 638
 639   Shell::GetInstance()->UpdateShelfVisibility();
 640 }
 641
 642 void RootWindowController::UpdateShelfVisibility() {
 643   shelf_->shelf_layout_manager()->UpdateVisibilityState();
 644 }
 645
 646 const aura::Window* RootWindowController::GetWindowForFullscreenMode() const {
 647   const aura::Window* topmost_window = NULL;
 648   const aura::Window* active_window = wm::GetActiveWindow();
 649   if (active_window && active_window->GetRootWindow() == GetRootWindow() &&
 650       IsSwitchableContainer(active_window->parent())) {
 651     // Use the active window when it is on the current root window to determine
 652     // the fullscreen state to allow temporarily using a panel or docked window
 653     // (which are always above the default container) while a fullscreen
 654     // window is open. We only use the active window when in a switchable
 655     // container as the launcher should not exit fullscreen mode.
 656     topmost_window = active_window;
 657   } else {
 658     // Otherwise, use the topmost window on the root window's default container
 659     // when there is no active window on this root window.
 660     const aura::Window::Windows& windows =
 661         GetContainer(kShellWindowId_DefaultContainer)->children();
 662     for (aura::Window::Windows::const_reverse_iterator iter = windows.rbegin();
 663          iter != windows.rend(); ++iter) {
 664       if (((*iter)->type() == ui::wm::WINDOW_TYPE_NORMAL ||
 665            (*iter)->type() == ui::wm::WINDOW_TYPE_PANEL) &&
 666           (*iter)->layer()->GetTargetVisibility()) {
 667         topmost_window = *iter;
 668         break;
 669       }
 670     }
 671   }
 672   while (topmost_window) {
 673     if (wm::GetWindowState(topmost_window)->IsFullscreen())
 674       return topmost_window;
 675     topmost_window = ::wm::GetTransientParent(topmost_window);
 676   }
 677   return NULL;
 678 }
 679
 680 void RootWindowController::ActivateKeyboard(
 681     keyboard::KeyboardController* keyboard_controller) {
 682   if (!keyboard::IsKeyboardEnabled() ||
 683       GetContainer(kShellWindowId_VirtualKeyboardContainer)) {
 684     return;
 685   }
 686   DCHECK(keyboard_controller);
 687   if (!keyboard::IsKeyboardUsabilityExperimentEnabled()) {
 688     keyboard_controller->AddObserver(shelf()->shelf_layout_manager());
 689     keyboard_controller->AddObserver(panel_layout_manager_);
 690     keyboard_controller->AddObserver(docked_layout_manager_);
 691     Shell::GetInstance()->delegate()->VirtualKeyboardActivated(true);
 692   }
 693   aura::Window* parent = GetContainer(
 694       kShellWindowId_VirtualKeyboardParentContainer);
 695   DCHECK(parent);
 696   aura::Window* keyboard_container =
 697       keyboard_controller->GetContainerWindow();
 698   keyboard_container->set_id(kShellWindowId_VirtualKeyboardContainer);
 699   parent->AddChild(keyboard_container);
 700   // TODO(oshima): Bounds of keyboard container should be handled by
 701   // RootWindowLayoutManager. Remove this after fixed RootWindowLayoutManager.
 702   keyboard_container->SetBounds(parent->bounds());
 703 }
 704
 705 void RootWindowController::DeactivateKeyboard(
 706     keyboard::KeyboardController* keyboard_controller) {
 707   if (!keyboard_controller ||
 708       !keyboard_controller->keyboard_container_initialized()) {
 709     return;
 710   }
 711   aura::Window* keyboard_container =
 712       keyboard_controller->GetContainerWindow();
 713   if (keyboard_container->GetRootWindow() == GetRootWindow()) {
 714     aura::Window* parent = GetContainer(
 715         kShellWindowId_VirtualKeyboardParentContainer);
 716     DCHECK(parent);
 717     parent->RemoveChild(keyboard_container);
 718     if (!keyboard::IsKeyboardUsabilityExperimentEnabled()) {
 719       // Virtual keyboard may be deactivated while still showing, notify all
 720       // observers that keyboard bounds changed to 0 before remove them.
 721       keyboard_controller->NotifyKeyboardBoundsChanging(gfx::Rect());
 722       keyboard_controller->RemoveObserver(shelf()->shelf_layout_manager());
 723       keyboard_controller->RemoveObserver(panel_layout_manager_);
 724       keyboard_controller->RemoveObserver(docked_layout_manager_);
 725       Shell::GetInstance()->delegate()->VirtualKeyboardActivated(false);
 726     }
 727   }
 728 }
 729
 730 bool RootWindowController::IsVirtualKeyboardWindow(aura::Window* window) {
 731   aura::Window* parent = GetContainer(
 732       kShellWindowId_VirtualKeyboardParentContainer);
 733   return parent ? parent->Contains(window) : false;
 734 }
 735
 736 ////////////////////////////////////////////////////////////////////////////////
 737 // RootWindowController, private:
 738
 739 RootWindowController::RootWindowController(AshWindowTreeHost* ash_host)
 740     : ash_host_(ash_host),
 741       root_window_layout_(NULL),
 742       docked_layout_manager_(NULL),
 743       panel_layout_manager_(NULL),
 744       touch_hud_debug_(NULL),
 745       touch_hud_projection_(NULL) {
 746   aura::Window* root_window = GetRootWindow();
 747   GetRootWindowSettings(root_window)->controller = this;
 748   screen_dimmer_.reset(new ScreenDimmer(root_window));
 749
 750   stacking_controller_.reset(new StackingController);
 751   aura::client::SetWindowTreeClient(root_window, stacking_controller_.get());
 752   capture_client_.reset(new ::wm::ScopedCaptureClient(root_window));
 753 }
 754
 755 void RootWindowController::Init(RootWindowType root_window_type,
 756                                 bool first_run_after_boot) {
 757   aura::Window* root_window = GetRootWindow();
 758   Shell* shell = Shell::GetInstance();
 759   shell->InitRootWindow(root_window);
 760
 761   ash_host_->AsWindowTreeHost()->SetCursor(ui::kCursorPointer);
 762   CreateContainersInRootWindow(root_window);
 763
 764   if (root_window_type == VIRTUAL_KEYBOARD) {
 765     aura::Window* virtual_keyboard_parent_container = GetContainer(
 766         kShellWindowId_VirtualKeyboardParentContainer);
 767     virtual_keyboard_parent_container->SetBounds(root_window->bounds());
 768     shell->InitKeyboard();
 769     return;
 770   }
 771
 772   CreateSystemBackground(first_run_after_boot);
 773
 774   InitLayoutManagers();
 775   InitTouchHuds();
 776
 777   if (Shell::GetPrimaryRootWindowController()->
 778       GetSystemModalLayoutManager(NULL)->has_modal_background()) {
 779     GetSystemModalLayoutManager(NULL)->CreateModalBackground();
 780   }
 781
 782   shell->AddShellObserver(this);
 783
 784   if (root_window_type == PRIMARY) {
 785     root_window_layout()->OnWindowResized();
 786     if (!keyboard::IsKeyboardUsabilityExperimentEnabled())
 787       shell->InitKeyboard();
 788   } else {
 789     root_window_layout()->OnWindowResized();
 790     ash_host_->AsWindowTreeHost()->Show();
 791
 792     // Create a shelf if a user is already logged in.
 793     if (shell->session_state_delegate()->NumberOfLoggedInUsers())
 794       shelf()->CreateShelf();
 795
 796     // Notify shell observers about new root window.
 797     shell->OnRootWindowAdded(root_window);
 798   }
 799
 800 #if defined(OS_CHROMEOS)
 801   if (!CommandLine::ForCurrentProcess()->HasSwitch(
 802           switches::kAshDisableTouchExplorationMode)) {
 803     cros_accessibility_observer_.reset(new CrosAccessibilityObserver(this));
 804   }
 805 #endif
 806 }
 807
 808 void RootWindowController::InitLayoutManagers() {
 809   aura::Window* root_window = GetRootWindow();
 810   root_window_layout_ = new RootWindowLayoutManager(root_window);
 811   root_window->SetLayoutManager(root_window_layout_);
 812
 813   aura::Window* default_container =
 814       GetContainer(kShellWindowId_DefaultContainer);
 815   // Workspace manager has its own layout managers.
 816   workspace_controller_.reset(
 817       new WorkspaceController(default_container));
 818
 819   aura::Window* always_on_top_container =
 820       GetContainer(kShellWindowId_AlwaysOnTopContainer);
 821   always_on_top_container->SetLayoutManager(
 822       new WorkspaceLayoutManager(always_on_top_container));
 823   always_on_top_controller_.reset(new AlwaysOnTopController);
 824   always_on_top_controller_->SetAlwaysOnTopContainer(always_on_top_container);
 825
 826   DCHECK(!shelf_.get());
 827   aura::Window* shelf_container = GetContainer(kShellWindowId_ShelfContainer);
 828   // TODO(harrym): Remove when status area is view.
 829   aura::Window* status_container = GetContainer(kShellWindowId_StatusContainer);
 830   shelf_.reset(new ShelfWidget(
 831       shelf_container, status_container, workspace_controller()));
 832
 833   if (!Shell::GetInstance()->session_state_delegate()->
 834       IsActiveUserSessionStarted()) {
 835     // This window exists only to be a event target on login screen.
 836     // It does not have to handle events, nor be visible.
 837     mouse_event_target_.reset(new aura::Window(new EmptyWindowDelegate));
 838     mouse_event_target_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
 839
 840     aura::Window* lock_background_container =
 841         GetContainer(kShellWindowId_LockScreenBackgroundContainer);
 842     lock_background_container->AddChild(mouse_event_target_.get());
 843     mouse_event_target_->Show();
 844   }
 845
 846   // Create Docked windows layout manager
 847   aura::Window* docked_container = GetContainer(kShellWindowId_DockedContainer);
 848   docked_layout_manager_ =
 849       new DockedWindowLayoutManager(docked_container, workspace_controller());
 850   docked_container->SetLayoutManager(docked_layout_manager_);
 851
 852   // Create Panel layout manager
 853   aura::Window* panel_container = GetContainer(kShellWindowId_PanelContainer);
 854   panel_layout_manager_ = new PanelLayoutManager(panel_container);
 855   panel_container->SetLayoutManager(panel_layout_manager_);
 856   panel_container_handler_.reset(new PanelWindowEventHandler);
 857   panel_container->AddPreTargetHandler(panel_container_handler_.get());
 858
 859   // Install an AttachedPanelWindowTargeter on the panel container to make it
 860   // easier to correctly target shelf buttons with touch.
 861   gfx::Insets mouse_extend(-kResizeOutsideBoundsSize,
 862                            -kResizeOutsideBoundsSize,
 863                            -kResizeOutsideBoundsSize,
 864                            -kResizeOutsideBoundsSize);
 865   gfx::Insets touch_extend = mouse_extend.Scale(
 866       kResizeOutsideBoundsScaleForTouch);
 867   panel_container->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
 868       new AttachedPanelWindowTargeter(panel_container,
 869                                       mouse_extend,
 870                                       touch_extend,
 871                                       panel_layout_manager_)));
 872 }
 873
 874 void RootWindowController::InitTouchHuds() {
 875   CommandLine* command_line = CommandLine::ForCurrentProcess();
 876   if (command_line->HasSwitch(switches::kAshTouchHud))
 877     set_touch_hud_debug(new TouchHudDebug(GetRootWindow()));
 878   if (Shell::GetInstance()->is_touch_hud_projection_enabled())
 879     EnableTouchHudProjection();
 880 }
 881
 882 void RootWindowController::CreateSystemBackground(
 883     bool is_first_run_after_boot) {
 884   SkColor color = SK_ColorBLACK;
 885 #if defined(OS_CHROMEOS)
 886   if (is_first_run_after_boot)
 887     color = kChromeOsBootColor;
 888 #endif
 889   system_background_.reset(
 890       new SystemBackgroundController(GetRootWindow(), color));
 891
 892 #if defined(OS_CHROMEOS)
 893   // Make a copy of the system's boot splash screen so we can composite it
 894   // onscreen until the desktop background is ready.
 895   if (is_first_run_after_boot &&
 896       (CommandLine::ForCurrentProcess()->HasSwitch(
 897            switches::kAshCopyHostBackgroundAtBoot) ||
 898        CommandLine::ForCurrentProcess()->HasSwitch(
 899            switches::kAshAnimateFromBootSplashScreen)))
 900     boot_splash_screen_.reset(new BootSplashScreen(GetHost()));
 901 #endif
 902 }
 903
 904 void RootWindowController::CreateContainersInRootWindow(
 905     aura::Window* root_window) {
 906   // These containers are just used by PowerButtonController to animate groups
 907   // of containers simultaneously without messing up the current transformations
 908   // on those containers. These are direct children of the root window; all of
 909   // the other containers are their children.
 910
 911   // The desktop background container is not part of the lock animation, so it
 912   // is not included in those animate groups.
 913   // When screen is locked desktop background is moved to lock screen background
 914   // container (moved back on unlock). We want to make sure that there's an
 915   // opaque layer occluding the non-lock-screen layers.
 916   aura::Window* desktop_background_container = CreateContainer(
 917       kShellWindowId_DesktopBackgroundContainer,
 918       "DesktopBackgroundContainer",
 919       root_window);
 920   ::wm::SetChildWindowVisibilityChangesAnimated(desktop_background_container);
 921
 922   aura::Window* non_lock_screen_containers = CreateContainer(
 923       kShellWindowId_NonLockScreenContainersContainer,
 924       "NonLockScreenContainersContainer",
 925       root_window);
 926
 927   aura::Window* lock_background_containers = CreateContainer(
 928       kShellWindowId_LockScreenBackgroundContainer,
 929       "LockScreenBackgroundContainer",
 930       root_window);
 931   ::wm::SetChildWindowVisibilityChangesAnimated(lock_background_containers);
 932
 933   aura::Window* lock_screen_containers = CreateContainer(
 934       kShellWindowId_LockScreenContainersContainer,
 935       "LockScreenContainersContainer",
 936       root_window);
 937   aura::Window* lock_screen_related_containers = CreateContainer(
 938       kShellWindowId_LockScreenRelatedContainersContainer,
 939       "LockScreenRelatedContainersContainer",
 940       root_window);
 941
 942   CreateContainer(kShellWindowId_UnparentedControlContainer,
 943                   "UnparentedControlContainer",
 944                   non_lock_screen_containers);
 945
 946   aura::Window* default_container = CreateContainer(
 947       kShellWindowId_DefaultContainer,
 948       "DefaultContainer",
 949       non_lock_screen_containers);
 950   ::wm::SetChildWindowVisibilityChangesAnimated(default_container);
 951   SetUsesScreenCoordinates(default_container);
 952   SetUsesEasyResizeTargeter(default_container);
 953
 954   aura::Window* always_on_top_container = CreateContainer(
 955       kShellWindowId_AlwaysOnTopContainer,
 956       "AlwaysOnTopContainer",
 957       non_lock_screen_containers);
 958   ::wm::SetChildWindowVisibilityChangesAnimated(always_on_top_container);
 959   SetUsesScreenCoordinates(always_on_top_container);
 960
 961   aura::Window* docked_container = CreateContainer(
 962       kShellWindowId_DockedContainer,
 963       "DockedContainer",
 964       non_lock_screen_containers);
 965   ::wm::SetChildWindowVisibilityChangesAnimated(docked_container);
 966   SetUsesScreenCoordinates(docked_container);
 967   SetUsesEasyResizeTargeter(docked_container);
 968
 969   aura::Window* shelf_container =
 970       CreateContainer(kShellWindowId_ShelfContainer,
 971                       "ShelfContainer",
 972                       non_lock_screen_containers);
 973   SetUsesScreenCoordinates(shelf_container);
 974   DescendantShouldStayInSameRootWindow(shelf_container);
 975
 976   aura::Window* panel_container = CreateContainer(
 977       kShellWindowId_PanelContainer,
 978       "PanelContainer",
 979       non_lock_screen_containers);
 980   SetUsesScreenCoordinates(panel_container);
 981
 982   aura::Window* shelf_bubble_container =
 983       CreateContainer(kShellWindowId_ShelfBubbleContainer,
 984                       "ShelfBubbleContainer",
 985                       non_lock_screen_containers);
 986   SetUsesScreenCoordinates(shelf_bubble_container);
 987   DescendantShouldStayInSameRootWindow(shelf_bubble_container);
 988
 989   aura::Window* app_list_container =
 990       CreateContainer(kShellWindowId_AppListContainer,
 991                       "AppListContainer",
 992                       non_lock_screen_containers);
 993   SetUsesScreenCoordinates(app_list_container);
 994
 995   aura::Window* modal_container = CreateContainer(
 996       kShellWindowId_SystemModalContainer,
 997       "SystemModalContainer",
 998       non_lock_screen_containers);
 999   modal_container->SetLayoutManager(
1000       new SystemModalContainerLayoutManager(modal_container));
1001   ::wm::SetChildWindowVisibilityChangesAnimated(modal_container);
1002   SetUsesScreenCoordinates(modal_container);
1003   SetUsesEasyResizeTargeter(modal_container);
1004
1005   // TODO(beng): Figure out if we can make this use
1006   // SystemModalContainerEventFilter instead of stops_event_propagation.
1007   aura::Window* lock_container = CreateContainer(
1008       kShellWindowId_LockScreenContainer,
1009       "LockScreenContainer",
1010       lock_screen_containers);
1011   lock_container->SetLayoutManager(new WorkspaceLayoutManager(lock_container));
1012   SetUsesScreenCoordinates(lock_container);
1013   // TODO(beng): stopsevents
1014
1015   aura::Window* lock_modal_container = CreateContainer(
1016       kShellWindowId_LockSystemModalContainer,
1017       "LockSystemModalContainer",
1018       lock_screen_containers);
1019   lock_modal_container->SetLayoutManager(
1020       new SystemModalContainerLayoutManager(lock_modal_container));
1021   ::wm::SetChildWindowVisibilityChangesAnimated(lock_modal_container);
1022   SetUsesScreenCoordinates(lock_modal_container);
1023   SetUsesEasyResizeTargeter(lock_modal_container);
1024
1025   aura::Window* status_container =
1026       CreateContainer(kShellWindowId_StatusContainer,
1027                       "StatusContainer",
1028                       lock_screen_related_containers);
1029   SetUsesScreenCoordinates(status_container);
1030   DescendantShouldStayInSameRootWindow(status_container);
1031
1032   aura::Window* settings_bubble_container = CreateContainer(
1033       kShellWindowId_SettingBubbleContainer,
1034       "SettingBubbleContainer",
1035       lock_screen_related_containers);
1036   ::wm::SetChildWindowVisibilityChangesAnimated(settings_bubble_container);
1037   SetUsesScreenCoordinates(settings_bubble_container);
1038   DescendantShouldStayInSameRootWindow(settings_bubble_container);
1039
1040   aura::Window* menu_container = CreateContainer(
1041       kShellWindowId_MenuContainer,
1042       "MenuContainer",
1043       lock_screen_related_containers);
1044   ::wm::SetChildWindowVisibilityChangesAnimated(menu_container);
1045   SetUsesScreenCoordinates(menu_container);
1046
1047   aura::Window* drag_drop_container = CreateContainer(
1048       kShellWindowId_DragImageAndTooltipContainer,
1049       "DragImageAndTooltipContainer",
1050       lock_screen_related_containers);
1051   ::wm::SetChildWindowVisibilityChangesAnimated(drag_drop_container);
1052   SetUsesScreenCoordinates(drag_drop_container);
1053
1054   aura::Window* overlay_container = CreateContainer(
1055       kShellWindowId_OverlayContainer,
1056       "OverlayContainer",
1057       lock_screen_related_containers);
1058   SetUsesScreenCoordinates(overlay_container);
1059
1060   aura::Window* virtual_keyboard_parent_container = CreateContainer(
1061       kShellWindowId_VirtualKeyboardParentContainer,
1062       "VirtualKeyboardParentContainer",
1063       root_window);
1064   SetUsesScreenCoordinates(virtual_keyboard_parent_container);
1065
1066 #if defined(OS_CHROMEOS)
1067   aura::Window* mouse_cursor_container = CreateContainer(
1068       kShellWindowId_MouseCursorContainer,
1069       "MouseCursorContainer",
1070       root_window);
1071   SetUsesScreenCoordinates(mouse_cursor_container);
1072 #endif
1073
1074   CreateContainer(kShellWindowId_PowerButtonAnimationContainer,
1075                   "PowerButtonAnimationContainer", root_window);
1076 }
1077
1078 void RootWindowController::EnableTouchHudProjection() {
1079   if (touch_hud_projection_)
1080     return;
1081   set_touch_hud_projection(new TouchHudProjection(GetRootWindow()));
1082 }
1083
1084 void RootWindowController::DisableTouchHudProjection() {
1085   if (!touch_hud_projection_)
1086     return;
1087   touch_hud_projection_->Remove();
1088 }
1089
1090 void RootWindowController::OnLoginStateChanged(user::LoginStatus status) {
1091   shelf_->shelf_layout_manager()->UpdateVisibilityState();
1092 }
1093
1094 void RootWindowController::OnTouchHudProjectionToggled(bool enabled) {
1095   if (enabled)
1096     EnableTouchHudProjection();
1097   else
1098     DisableTouchHudProjection();
1099 }
1100
1101 RootWindowController* GetRootWindowController(
1102     const aura::Window* root_window) {
1103   return root_window ? GetRootWindowSettings(root_window)->controller : NULL;
1104 }
1105
1106 }  // namespace ash