src/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/lock_layout_manager.h"
  38 #include "ash/wm/panels/attached_panel_window_targeter.h"
  39 #include "ash/wm/panels/panel_layout_manager.h"
  40 #include "ash/wm/panels/panel_window_event_handler.h"
  41 #include "ash/wm/root_window_layout_manager.h"
  42 #include "ash/wm/screen_dimmer.h"
  43 #include "ash/wm/stacking_controller.h"
  44 #include "ash/wm/status_area_layout_manager.h"
  45 #include "ash/wm/system_background_controller.h"
  46 #include "ash/wm/system_modal_container_layout_manager.h"
  47 #include "ash/wm/window_properties.h"
  48 #include "ash/wm/window_state.h"
  49 #include "ash/wm/window_util.h"
  50 #include "ash/wm/workspace/workspace_layout_manager.h"
  51 #include "ash/wm/workspace_controller.h"
  52 #include "base/command_line.h"
  53 #include "base/time/time.h"
  54 #include "ui/aura/client/aura_constants.h"
  55 #include "ui/aura/client/screen_position_client.h"
  56 #include "ui/aura/window.h"
  57 #include "ui/aura/window_delegate.h"
  58 #include "ui/aura/window_event_dispatcher.h"
  59 #include "ui/aura/window_observer.h"
  60 #include "ui/aura/window_tracker.h"
  61 #include "ui/base/hit_test.h"
  62 #include "ui/base/models/menu_model.h"
  63 #include "ui/gfx/display.h"
  64 #include "ui/gfx/screen.h"
  65 #include "ui/keyboard/keyboard_controller.h"
  66 #include "ui/keyboard/keyboard_util.h"
  67 #include "ui/views/controls/menu/menu_runner.h"
  68 #include "ui/views/view_model.h"
  69 #include "ui/views/view_model_utils.h"
  70 #include "ui/wm/core/capture_controller.h"
  71 #include "ui/wm/core/easy_resize_window_targeter.h"
  72 #include "ui/wm/core/visibility_controller.h"
  73 #include "ui/wm/core/window_util.h"
  74 #include "ui/wm/public/drag_drop_client.h"
  75 #include "ui/wm/public/tooltip_client.h"
  76 #include "ui/wm/public/window_types.h"
  77
  78 #if defined(OS_CHROMEOS)
  79 #include "ash/system/tray_accessibility.h"
  80 #include "ash/wm/boot_splash_screen_chromeos.h"
  81 #include "ui/chromeos/touch_exploration_controller.h"
  82 #endif
  83
  84 namespace ash {
  85 namespace {
  86
  87 #if defined(OS_CHROMEOS)
  88 // Duration for the animation that hides the boot splash screen, in
  89 // milliseconds.  This should be short enough in relation to
  90 // wm/window_animation.cc's brightness/grayscale fade animation that the login
  91 // background image animation isn't hidden by the splash screen animation.
  92 const int kBootSplashScreenHideDurationMs = 500;
  93 #endif
  94
  95 // Creates a new window for use as a container.
  96 aura::Window* CreateContainer(int window_id,
  97                               const char* name,
  98                               aura::Window* parent) {
  99   aura::Window* container = new aura::Window(NULL);
 100   container->set_id(window_id);
 101   container->SetName(name);
 102   container->Init(aura::WINDOW_LAYER_NOT_DRAWN);
 103   parent->AddChild(container);
 104   if (window_id != kShellWindowId_UnparentedControlContainer)
 105     container->Show();
 106   return container;
 107 }
 108
 109 float ToRelativeValue(int value, int src, int dst) {
 110   return static_cast<float>(value) / static_cast<float>(src) * dst;
 111 }
 112
 113 void MoveOriginRelativeToSize(const gfx::Size& src_size,
 114                                 const gfx::Size& dst_size,
 115                                 gfx::Rect* bounds_in_out) {
 116   gfx::Point origin = bounds_in_out->origin();
 117   bounds_in_out->set_origin(gfx::Point(
 118       ToRelativeValue(origin.x(), src_size.width(), dst_size.width()),
 119       ToRelativeValue(origin.y(), src_size.height(), dst_size.height())));
 120 }
 121
 122 // Reparents |window| to |new_parent|.
 123 void ReparentWindow(aura::Window* window, aura::Window* new_parent) {
 124   const gfx::Size src_size = window->parent()->bounds().size();
 125   const gfx::Size dst_size = new_parent->bounds().size();
 126   // Update the restore bounds to make it relative to the display.
 127   wm::WindowState* state = wm::GetWindowState(window);
 128   gfx::Rect restore_bounds;
 129   bool has_restore_bounds = state->HasRestoreBounds();
 130
 131   bool update_bounds = (state->IsNormalOrSnapped() || state->IsMinimized()) &&
 132                        new_parent->id() != kShellWindowId_DockedContainer;
 133   gfx::Rect local_bounds;
 134   if (update_bounds) {
 135     local_bounds = state->window()->bounds();
 136     MoveOriginRelativeToSize(src_size, dst_size, &local_bounds);
 137   }
 138
 139   if (has_restore_bounds) {
 140     restore_bounds = state->GetRestoreBoundsInParent();
 141     MoveOriginRelativeToSize(src_size, dst_size, &restore_bounds);
 142   }
 143
 144   new_parent->AddChild(window);
 145
 146   // Docked windows have bounds handled by the layout manager in AddChild().
 147   if (update_bounds)
 148     window->SetBounds(local_bounds);
 149
 150   if (has_restore_bounds)
 151     state->SetRestoreBoundsInParent(restore_bounds);
 152 }
 153
 154 // Reparents the appropriate set of windows from |src| to |dst|.
 155 void ReparentAllWindows(aura::Window* src, aura::Window* dst) {
 156   // Set of windows to move.
 157   const int kContainerIdsToMove[] = {
 158       kShellWindowId_DefaultContainer,
 159       kShellWindowId_DockedContainer,
 160       kShellWindowId_PanelContainer,
 161       kShellWindowId_AlwaysOnTopContainer,
 162       kShellWindowId_SystemModalContainer,
 163       kShellWindowId_LockSystemModalContainer,
 164       kShellWindowId_UnparentedControlContainer, };
 165   for (size_t i = 0; i < arraysize(kContainerIdsToMove); i++) {
 166     int id = kContainerIdsToMove[i];
 167     aura::Window* src_container = Shell::GetContainer(src, id);
 168     aura::Window* dst_container = Shell::GetContainer(dst, id);
 169     while (!src_container->children().empty()) {
 170       // Restart iteration from the source container windows each time as they
 171       // may change as a result of moving other windows.
 172       aura::Window::Windows::const_iterator iter =
 173           src_container->children().begin();
 174       while (iter != src_container->children().end() &&
 175              SystemModalContainerLayoutManager::IsModalBackground(*iter)) {
 176         ++iter;
 177       }
 178       // If the entire window list is modal background windows then stop.
 179       if (iter == src_container->children().end())
 180         break;
 181       ReparentWindow(*iter, dst_container);
 182     }
 183   }
 184 }
 185
 186 // Mark the container window so that a widget added to this container will
 187 // use the virtual screeen coordinates instead of parent.
 188 void SetUsesScreenCoordinates(aura::Window* container) {
 189   container->SetProperty(kUsesScreenCoordinatesKey, true);
 190 }
 191
 192 // Mark the container window so that a widget added to this container will
 193 // say in the same root window regardless of the bounds specified.
 194 void DescendantShouldStayInSameRootWindow(aura::Window* container) {
 195   container->SetProperty(kStayInSameRootWindowKey, true);
 196 }
 197
 198 void SetUsesEasyResizeTargeter(aura::Window* container) {
 199   gfx::Insets mouse_extend(-kResizeOutsideBoundsSize,
 200                            -kResizeOutsideBoundsSize,
 201                            -kResizeOutsideBoundsSize,
 202                            -kResizeOutsideBoundsSize);
 203   gfx::Insets touch_extend = mouse_extend.Scale(
 204       kResizeOutsideBoundsScaleForTouch);
 205   container->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
 206       new ::wm::EasyResizeWindowTargeter(container, mouse_extend,
 207                                          touch_extend)));
 208 }
 209
 210 // A window delegate which does nothing. Used to create a window that
 211 // is a event target, but do nothing.
 212 class EmptyWindowDelegate : public aura::WindowDelegate {
 213  public:
 214   EmptyWindowDelegate() {}
 215   virtual ~EmptyWindowDelegate() {}
 216
 217   // aura::WindowDelegate overrides:
 218   virtual gfx::Size GetMinimumSize() const OVERRIDE {
 219     return gfx::Size();
 220   }
 221   virtual gfx::Size GetMaximumSize() const OVERRIDE {
 222     return gfx::Size();
 223   }
 224   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
 225                                const gfx::Rect& new_bounds) OVERRIDE {
 226   }
 227   virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE {
 228     return gfx::kNullCursor;
 229   }
 230   virtual int GetNonClientComponent(
 231       const gfx::Point& point) const OVERRIDE {
 232     return HTNOWHERE;
 233   }
 234   virtual bool ShouldDescendIntoChildForEventHandling(
 235       aura::Window* child,
 236       const gfx::Point& location) OVERRIDE {
 237     return false;
 238   }
 239   virtual bool CanFocus() OVERRIDE {
 240     return false;
 241   }
 242   virtual void OnCaptureLost() OVERRIDE {
 243   }
 244   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
 245   }
 246   virtual void OnDeviceScaleFactorChanged(
 247       float device_scale_factor) OVERRIDE {
 248   }
 249   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {}
 250   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE {
 251     delete this;
 252   }
 253   virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {
 254   }
 255   virtual bool HasHitTestMask() const OVERRIDE {
 256     return false;
 257   }
 258   virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE {}
 259
 260  private:
 261   DISALLOW_COPY_AND_ASSIGN(EmptyWindowDelegate);
 262 };
 263
 264 #if defined(OS_CHROMEOS)
 265 // Responsible for initializing TouchExplorationController when spoken
 266 // feedback is on.
 267 class CrosAccessibilityObserver : public AccessibilityObserver {
 268  public:
 269   explicit CrosAccessibilityObserver(
 270       RootWindowController* root_window_controller)
 271       : root_window_controller_(root_window_controller) {
 272     Shell::GetInstance()->system_tray_notifier()->
 273         AddAccessibilityObserver(this);
 274     UpdateTouchExplorationState();
 275   }
 276
 277   virtual ~CrosAccessibilityObserver() {
 278     SystemTrayNotifier* system_tray_notifier =
 279         Shell::GetInstance()->system_tray_notifier();
 280     if (system_tray_notifier)
 281       system_tray_notifier->RemoveAccessibilityObserver(this);
 282   }
 283
 284  private:
 285   void UpdateTouchExplorationState() {
 286     AccessibilityDelegate* delegate =
 287         Shell::GetInstance()->accessibility_delegate();
 288     bool enabled = delegate->IsSpokenFeedbackEnabled();
 289
 290     if (enabled && !touch_exploration_controller_.get()) {
 291       touch_exploration_controller_.reset(
 292           new ui::TouchExplorationController(
 293               root_window_controller_->GetRootWindow()));
 294     } else if (!enabled) {
 295       touch_exploration_controller_.reset();
 296     }
 297   }
 298
 299   // Overridden from AccessibilityObserver.
 300   virtual void OnAccessibilityModeChanged(
 301       AccessibilityNotificationVisibility notify) OVERRIDE {
 302     UpdateTouchExplorationState();
 303   }
 304
 305   scoped_ptr<ui::TouchExplorationController> touch_exploration_controller_;
 306   RootWindowController* root_window_controller_;
 307
 308   DISALLOW_COPY_AND_ASSIGN(CrosAccessibilityObserver);
 309 };
 310 #endif  // OS_CHROMEOS
 311
 312 }  // namespace
 313
 314 void RootWindowController::CreateForPrimaryDisplay(AshWindowTreeHost* host) {
 315   RootWindowController* controller = new RootWindowController(host);
 316   controller->Init(RootWindowController::PRIMARY,
 317                    Shell::GetInstance()->delegate()->IsFirstRunAfterBoot());
 318 }
 319
 320 void RootWindowController::CreateForSecondaryDisplay(AshWindowTreeHost* host) {
 321   RootWindowController* controller = new RootWindowController(host);
 322   controller->Init(RootWindowController::SECONDARY, false /* first run */);
 323 }
 324
 325 void RootWindowController::CreateForVirtualKeyboardDisplay(
 326     AshWindowTreeHost* host) {
 327   RootWindowController* controller = new RootWindowController(host);
 328   controller->Init(RootWindowController::VIRTUAL_KEYBOARD,
 329                    false /* first run */);
 330 }
 331
 332 // static
 333 RootWindowController* RootWindowController::ForShelf(
 334     const aura::Window* window) {
 335   return GetRootWindowController(window->GetRootWindow());
 336 }
 337
 338 // static
 339 RootWindowController* RootWindowController::ForWindow(
 340     const aura::Window* window) {
 341   return GetRootWindowController(window->GetRootWindow());
 342 }
 343
 344 // static
 345 RootWindowController* RootWindowController::ForTargetRootWindow() {
 346   return GetRootWindowController(Shell::GetTargetRootWindow());
 347 }
 348
 349 // static
 350 aura::Window* RootWindowController::GetContainerForWindow(
 351     aura::Window* window) {
 352   aura::Window* container = window->parent();
 353   while (container && container->type() != ui::wm::WINDOW_TYPE_UNKNOWN)
 354     container = container->parent();
 355   return container;
 356 }
 357
 358 RootWindowController::~RootWindowController() {
 359   Shutdown();
 360   ash_host_.reset();
 361   // The CaptureClient needs to be around for as long as the RootWindow is
 362   // valid.
 363   capture_client_.reset();
 364 }
 365
 366 aura::WindowTreeHost* RootWindowController::GetHost() {
 367   return ash_host_->AsWindowTreeHost();
 368 }
 369
 370 const aura::WindowTreeHost* RootWindowController::GetHost() const {
 371   return ash_host_->AsWindowTreeHost();
 372 }
 373
 374 aura::Window* RootWindowController::GetRootWindow() {
 375   return GetHost()->window();
 376 }
 377
 378 const aura::Window* RootWindowController::GetRootWindow() const {
 379   return GetHost()->window();
 380 }
 381
 382 void RootWindowController::SetWallpaperController(
 383     DesktopBackgroundWidgetController* controller) {
 384   wallpaper_controller_.reset(controller);
 385 }
 386
 387 void RootWindowController::SetAnimatingWallpaperController(
 388     AnimatingDesktopController* controller) {
 389   if (animating_wallpaper_controller_.get())
 390     animating_wallpaper_controller_->StopAnimating();
 391   animating_wallpaper_controller_.reset(controller);
 392 }
 393
 394 void RootWindowController::Shutdown() {
 395   Shell* shell = Shell::GetInstance();
 396   shell->RemoveShellObserver(this);
 397
 398 #if defined(OS_CHROMEOS)
 399   if (cros_accessibility_observer_) {
 400     cros_accessibility_observer_.reset();
 401   }
 402 #endif
 403
 404   if (animating_wallpaper_controller_.get())
 405     animating_wallpaper_controller_->StopAnimating();
 406   wallpaper_controller_.reset();
 407   animating_wallpaper_controller_.reset();
 408   aura::Window* root_window = GetRootWindow();
 409   // Change the target root window before closing child windows. If any child
 410   // being removed triggers a relayout of the shelf it will try to build a
 411   // window list adding windows from the target root window's containers which
 412   // may have already gone away.
 413   if (Shell::GetTargetRootWindow() == root_window) {
 414     shell->set_target_root_window(
 415         Shell::GetPrimaryRootWindow() == root_window
 416             ? NULL
 417             : Shell::GetPrimaryRootWindow());
 418   }
 419
 420   CloseChildWindows();
 421   GetRootWindowSettings(root_window)->controller = NULL;
 422   screen_dimmer_.reset();
 423   workspace_controller_.reset();
 424   // Forget with the display ID so that display lookup
 425   // ends up with invalid display.
 426   GetRootWindowSettings(root_window)->display_id =
 427       gfx::Display::kInvalidDisplayID;
 428   ash_host_->PrepareForShutdown();
 429
 430   system_background_.reset();
 431   aura::client::SetScreenPositionClient(root_window, NULL);
 432 }
 433
 434 SystemModalContainerLayoutManager*
 435 RootWindowController::GetSystemModalLayoutManager(aura::Window* window) {
 436   aura::Window* modal_container = NULL;
 437   if (window) {
 438     aura::Window* window_container = GetContainerForWindow(window);
 439     if (window_container &&
 440         window_container->id() >= kShellWindowId_LockScreenContainer) {
 441       modal_container = GetContainer(kShellWindowId_LockSystemModalContainer);
 442     } else {
 443       modal_container = GetContainer(kShellWindowId_SystemModalContainer);
 444     }
 445   } else {
 446     int modal_window_id = Shell::GetInstance()->session_state_delegate()
 447         ->IsUserSessionBlocked() ? kShellWindowId_LockSystemModalContainer :
 448                                    kShellWindowId_SystemModalContainer;
 449     modal_container = GetContainer(modal_window_id);
 450   }
 451   return modal_container ? static_cast<SystemModalContainerLayoutManager*>(
 452       modal_container->layout_manager()) : NULL;
 453 }
 454
 455 aura::Window* RootWindowController::GetContainer(int container_id) {
 456   return GetRootWindow()->GetChildById(container_id);
 457 }
 458
 459 const aura::Window* RootWindowController::GetContainer(int container_id) const {
 460   return ash_host_->AsWindowTreeHost()->window()->GetChildById(container_id);
 461 }
 462
 463 void RootWindowController::ShowShelf() {
 464   if (!shelf_->shelf())
 465     return;
 466   shelf_->shelf()->SetVisible(true);
 467   shelf_->status_area_widget()->Show();
 468 }
 469
 470 void RootWindowController::OnShelfCreated() {
 471   if (panel_layout_manager_)
 472     panel_layout_manager_->SetShelf(shelf_->shelf());
 473   if (docked_layout_manager_) {
 474     docked_layout_manager_->SetShelf(shelf_->shelf());
 475     if (shelf_->shelf_layout_manager())
 476       docked_layout_manager_->AddObserver(shelf_->shelf_layout_manager());
 477   }
 478
 479   // Notify shell observers that the shelf has been created.
 480   Shell::GetInstance()->OnShelfCreatedForRootWindow(GetRootWindow());
 481 }
 482
 483 void RootWindowController::UpdateAfterLoginStatusChange(
 484     user::LoginStatus status) {
 485   if (status != user::LOGGED_IN_NONE)
 486     mouse_event_target_.reset();
 487   if (shelf_->status_area_widget())
 488     shelf_->status_area_widget()->UpdateAfterLoginStatusChange(status);
 489 }
 490
 491 void RootWindowController::HandleInitialDesktopBackgroundAnimationStarted() {
 492 #if defined(OS_CHROMEOS)
 493   if (CommandLine::ForCurrentProcess()->HasSwitch(
 494           switches::kAshAnimateFromBootSplashScreen) &&
 495       boot_splash_screen_.get()) {
 496     // Make the splash screen fade out so it doesn't obscure the desktop
 497     // wallpaper's brightness/grayscale animation.
 498     boot_splash_screen_->StartHideAnimation(
 499         base::TimeDelta::FromMilliseconds(kBootSplashScreenHideDurationMs));
 500   }
 501 #endif
 502 }
 503
 504 void RootWindowController::OnWallpaperAnimationFinished(views::Widget* widget) {
 505   // Make sure the wallpaper is visible.
 506   system_background_->SetColor(SK_ColorBLACK);
 507 #if defined(OS_CHROMEOS)
 508   boot_splash_screen_.reset();
 509 #endif
 510
 511   Shell::GetInstance()->user_wallpaper_delegate()->
 512       OnWallpaperAnimationFinished();
 513   // Only removes old component when wallpaper animation finished. If we
 514   // remove the old one before the new wallpaper is done fading in there will
 515   // be a white flash during the animation.
 516   if (animating_wallpaper_controller()) {
 517     DesktopBackgroundWidgetController* controller =
 518         animating_wallpaper_controller()->GetController(true);
 519     // |desktop_widget_| should be the same animating widget we try to move
 520     // to |kDesktopController|. Otherwise, we may close |desktop_widget_|
 521     // before move it to |kDesktopController|.
 522     DCHECK_EQ(controller->widget(), widget);
 523     // Release the old controller and close its background widget.
 524     SetWallpaperController(controller);
 525   }
 526 }
 527
 528 void RootWindowController::CloseChildWindows() {
 529   mouse_event_target_.reset();
 530
 531   // Remove observer as deactivating keyboard causes |docked_layout_manager_|
 532   // to fire notifications.
 533   if (docked_layout_manager_ && shelf_ && shelf_->shelf_layout_manager())
 534     docked_layout_manager_->RemoveObserver(shelf_->shelf_layout_manager());
 535
 536   // Deactivate keyboard container before closing child windows and shutting
 537   // down associated layout managers.
 538   DeactivateKeyboard(keyboard::KeyboardController::GetInstance());
 539
 540   // panel_layout_manager_ needs to be shut down before windows are destroyed.
 541   if (panel_layout_manager_) {
 542     panel_layout_manager_->Shutdown();
 543     panel_layout_manager_ = NULL;
 544   }
 545   // docked_layout_manager_ needs to be shut down before windows are destroyed.
 546   if (docked_layout_manager_) {
 547     docked_layout_manager_->Shutdown();
 548     docked_layout_manager_ = NULL;
 549   }
 550   aura::Window* root_window = GetRootWindow();
 551   aura::client::SetDragDropClient(root_window, NULL);
 552
 553   // TODO(harrym): Remove when Status Area Widget is a child view.
 554   if (shelf_) {
 555     shelf_->ShutdownStatusAreaWidget();
 556
 557     if (shelf_->shelf_layout_manager())
 558       shelf_->shelf_layout_manager()->PrepareForShutdown();
 559   }
 560
 561   // Close background widget first as it depends on tooltip.
 562   wallpaper_controller_.reset();
 563   animating_wallpaper_controller_.reset();
 564
 565   workspace_controller_.reset();
 566   aura::client::SetTooltipClient(root_window, NULL);
 567
 568   // Explicitly destroy top level windows. We do this as during part of
 569   // destruction such windows may query the RootWindow for state.
 570   std::queue<aura::Window*> non_toplevel_windows;
 571   non_toplevel_windows.push(root_window);
 572   while (!non_toplevel_windows.empty()) {
 573     aura::Window* non_toplevel_window = non_toplevel_windows.front();
 574     non_toplevel_windows.pop();
 575     aura::WindowTracker toplevel_windows;
 576     for (size_t i = 0; i < non_toplevel_window->children().size(); ++i) {
 577       aura::Window* child = non_toplevel_window->children()[i];
 578       if (!child->owned_by_parent())
 579         continue;
 580       if (child->delegate())
 581         toplevel_windows.Add(child);
 582       else
 583         non_toplevel_windows.push(child);
 584     }
 585     while (!toplevel_windows.windows().empty())
 586       delete *toplevel_windows.windows().begin();
 587   }
 588   // And then remove the containers.
 589   while (!root_window->children().empty()) {
 590     aura::Window* window = root_window->children()[0];
 591     if (window->owned_by_parent()) {
 592       delete window;
 593     } else {
 594       root_window->RemoveChild(window);
 595     }
 596   }
 597
 598   shelf_.reset();
 599 }
 600
 601 void RootWindowController::MoveWindowsTo(aura::Window* dst) {
 602   // Forget the shelf early so that shelf don't update itself using wrong
 603   // display info.
 604   workspace_controller_->SetShelf(NULL);
 605   ReparentAllWindows(GetRootWindow(), dst);
 606 }
 607
 608 ShelfLayoutManager* RootWindowController::GetShelfLayoutManager() {
 609   return shelf_->shelf_layout_manager();
 610 }
 611
 612 SystemTray* RootWindowController::GetSystemTray() {
 613   // We assume in throughout the code that this will not return NULL. If code
 614   // triggers this for valid reasons, it should test status_area_widget first.
 615   CHECK(shelf_->status_area_widget());
 616   return shelf_->status_area_widget()->system_tray();
 617 }
 618
 619 void RootWindowController::ShowContextMenu(const gfx::Point& location_in_screen,
 620                                            ui::MenuSourceType source_type) {
 621   DCHECK(Shell::GetInstance()->delegate());
 622   scoped_ptr<ui::MenuModel> menu_model(
 623       Shell::GetInstance()->delegate()->CreateContextMenu(
 624           GetRootWindow(), NULL, NULL));
 625   if (!menu_model)
 626     return;
 627
 628   // Background controller may not be set yet if user clicked on status are
 629   // before initial animation completion. See crbug.com/222218
 630   if (!wallpaper_controller_.get())
 631     return;
 632
 633   views::MenuRunner menu_runner(menu_model.get());
 634   if (menu_runner.RunMenuAt(wallpaper_controller_->widget(),
 635                             NULL,
 636                             gfx::Rect(location_in_screen, gfx::Size()),
 637                             views::MENU_ANCHOR_TOPLEFT,
 638                             source_type,
 639                             views::MenuRunner::CONTEXT_MENU) ==
 640       views::MenuRunner::MENU_DELETED) {
 641     return;
 642   }
 643
 644   Shell::GetInstance()->UpdateShelfVisibility();
 645 }
 646
 647 void RootWindowController::UpdateShelfVisibility() {
 648   shelf_->shelf_layout_manager()->UpdateVisibilityState();
 649 }
 650
 651 const aura::Window* RootWindowController::GetWindowForFullscreenMode() const {
 652   const aura::Window* topmost_window = NULL;
 653   const aura::Window* active_window = wm::GetActiveWindow();
 654   if (active_window && active_window->GetRootWindow() == GetRootWindow() &&
 655       IsSwitchableContainer(active_window->parent())) {
 656     // Use the active window when it is on the current root window to determine
 657     // the fullscreen state to allow temporarily using a panel or docked window
 658     // (which are always above the default container) while a fullscreen
 659     // window is open. We only use the active window when in a switchable
 660     // container as the launcher should not exit fullscreen mode.
 661     topmost_window = active_window;
 662   } else {
 663     // Otherwise, use the topmost window on the root window's default container
 664     // when there is no active window on this root window.
 665     const aura::Window::Windows& windows =
 666         GetContainer(kShellWindowId_DefaultContainer)->children();
 667     for (aura::Window::Windows::const_reverse_iterator iter = windows.rbegin();
 668          iter != windows.rend(); ++iter) {
 669       if (((*iter)->type() == ui::wm::WINDOW_TYPE_NORMAL ||
 670            (*iter)->type() == ui::wm::WINDOW_TYPE_PANEL) &&
 671           (*iter)->layer()->GetTargetVisibility()) {
 672         topmost_window = *iter;
 673         break;
 674       }
 675     }
 676   }
 677   while (topmost_window) {
 678     if (wm::GetWindowState(topmost_window)->IsFullscreen())
 679       return topmost_window;
 680     topmost_window = ::wm::GetTransientParent(topmost_window);
 681   }
 682   return NULL;
 683 }
 684
 685 void RootWindowController::ActivateKeyboard(
 686     keyboard::KeyboardController* keyboard_controller) {
 687   if (!keyboard::IsKeyboardEnabled() ||
 688       GetContainer(kShellWindowId_VirtualKeyboardContainer)) {
 689     return;
 690   }
 691   DCHECK(keyboard_controller);
 692   if (!keyboard::IsKeyboardUsabilityExperimentEnabled()) {
 693     keyboard_controller->AddObserver(shelf()->shelf_layout_manager());
 694     keyboard_controller->AddObserver(panel_layout_manager_);
 695     keyboard_controller->AddObserver(docked_layout_manager_);
 696     keyboard_controller->AddObserver(workspace_controller_->layout_manager());
 697     Shell::GetInstance()->delegate()->VirtualKeyboardActivated(true);
 698   }
 699   aura::Window* parent = GetContainer(
 700       kShellWindowId_VirtualKeyboardParentContainer);
 701   DCHECK(parent);
 702   aura::Window* keyboard_container =
 703       keyboard_controller->GetContainerWindow();
 704   keyboard_container->set_id(kShellWindowId_VirtualKeyboardContainer);
 705   parent->AddChild(keyboard_container);
 706   // TODO(oshima): Bounds of keyboard container should be handled by
 707   // RootWindowLayoutManager. Remove this after fixed RootWindowLayoutManager.
 708   keyboard_container->SetBounds(parent->bounds());
 709 }
 710
 711 void RootWindowController::DeactivateKeyboard(
 712     keyboard::KeyboardController* keyboard_controller) {
 713   if (!keyboard_controller ||
 714       !keyboard_controller->keyboard_container_initialized()) {
 715     return;
 716   }
 717   aura::Window* keyboard_container =
 718       keyboard_controller->GetContainerWindow();
 719   if (keyboard_container->GetRootWindow() == GetRootWindow()) {
 720     aura::Window* parent = GetContainer(
 721         kShellWindowId_VirtualKeyboardParentContainer);
 722     DCHECK(parent);
 723     parent->RemoveChild(keyboard_container);
 724     if (!keyboard::IsKeyboardUsabilityExperimentEnabled()) {
 725       // Virtual keyboard may be deactivated while still showing, notify all
 726       // observers that keyboard bounds changed to 0 before remove them.
 727       keyboard_controller->NotifyKeyboardBoundsChanging(gfx::Rect());
 728       keyboard_controller->RemoveObserver(shelf()->shelf_layout_manager());
 729       keyboard_controller->RemoveObserver(panel_layout_manager_);
 730       keyboard_controller->RemoveObserver(docked_layout_manager_);
 731       keyboard_controller->RemoveObserver(
 732           workspace_controller_->layout_manager());
 733       Shell::GetInstance()->delegate()->VirtualKeyboardActivated(false);
 734     }
 735   }
 736 }
 737
 738 bool RootWindowController::IsVirtualKeyboardWindow(aura::Window* window) {
 739   aura::Window* parent = GetContainer(
 740       kShellWindowId_VirtualKeyboardParentContainer);
 741   return parent ? parent->Contains(window) : false;
 742 }
 743
 744 ////////////////////////////////////////////////////////////////////////////////
 745 // RootWindowController, private:
 746
 747 RootWindowController::RootWindowController(AshWindowTreeHost* ash_host)
 748     : ash_host_(ash_host),
 749       root_window_layout_(NULL),
 750       docked_layout_manager_(NULL),
 751       panel_layout_manager_(NULL),
 752       touch_hud_debug_(NULL),
 753       touch_hud_projection_(NULL) {
 754   aura::Window* root_window = GetRootWindow();
 755   GetRootWindowSettings(root_window)->controller = this;
 756   screen_dimmer_.reset(new ScreenDimmer(root_window));
 757
 758   stacking_controller_.reset(new StackingController);
 759   aura::client::SetWindowTreeClient(root_window, stacking_controller_.get());
 760   capture_client_.reset(new ::wm::ScopedCaptureClient(root_window));
 761 }
 762
 763 void RootWindowController::Init(RootWindowType root_window_type,
 764                                 bool first_run_after_boot) {
 765   aura::Window* root_window = GetRootWindow();
 766   Shell* shell = Shell::GetInstance();
 767   shell->InitRootWindow(root_window);
 768
 769   ash_host_->AsWindowTreeHost()->SetCursor(ui::kCursorPointer);
 770   CreateContainersInRootWindow(root_window);
 771
 772   if (root_window_type == VIRTUAL_KEYBOARD) {
 773     aura::Window* virtual_keyboard_parent_container = GetContainer(
 774         kShellWindowId_VirtualKeyboardParentContainer);
 775     virtual_keyboard_parent_container->SetBounds(root_window->bounds());
 776     shell->InitKeyboard();
 777     return;
 778   }
 779
 780   CreateSystemBackground(first_run_after_boot);
 781
 782   InitLayoutManagers();
 783   InitTouchHuds();
 784
 785   if (Shell::GetPrimaryRootWindowController()->
 786       GetSystemModalLayoutManager(NULL)->has_modal_background()) {
 787     GetSystemModalLayoutManager(NULL)->CreateModalBackground();
 788   }
 789
 790   shell->AddShellObserver(this);
 791
 792   if (root_window_type == PRIMARY) {
 793     root_window_layout()->OnWindowResized();
 794     if (!keyboard::IsKeyboardUsabilityExperimentEnabled())
 795       shell->InitKeyboard();
 796   } else {
 797     root_window_layout()->OnWindowResized();
 798     ash_host_->AsWindowTreeHost()->Show();
 799
 800     // Create a shelf if a user is already logged in.
 801     if (shell->session_state_delegate()->NumberOfLoggedInUsers())
 802       shelf()->CreateShelf();
 803
 804     // Notify shell observers about new root window.
 805     shell->OnRootWindowAdded(root_window);
 806   }
 807
 808 #if defined(OS_CHROMEOS)
 809   if (!CommandLine::ForCurrentProcess()->HasSwitch(
 810           switches::kAshDisableTouchExplorationMode)) {
 811     cros_accessibility_observer_.reset(new CrosAccessibilityObserver(this));
 812   }
 813 #endif
 814 }
 815
 816 void RootWindowController::InitLayoutManagers() {
 817   aura::Window* root_window = GetRootWindow();
 818   root_window_layout_ = new RootWindowLayoutManager(root_window);
 819   root_window->SetLayoutManager(root_window_layout_);
 820
 821   aura::Window* default_container =
 822       GetContainer(kShellWindowId_DefaultContainer);
 823   // Workspace manager has its own layout managers.
 824   workspace_controller_.reset(
 825       new WorkspaceController(default_container));
 826
 827   aura::Window* always_on_top_container =
 828       GetContainer(kShellWindowId_AlwaysOnTopContainer);
 829   always_on_top_container->SetLayoutManager(
 830       new WorkspaceLayoutManager(always_on_top_container));
 831   always_on_top_controller_.reset(new AlwaysOnTopController);
 832   always_on_top_controller_->SetAlwaysOnTopContainer(always_on_top_container);
 833
 834   DCHECK(!shelf_.get());
 835   aura::Window* shelf_container = GetContainer(kShellWindowId_ShelfContainer);
 836   // TODO(harrym): Remove when status area is view.
 837   aura::Window* status_container = GetContainer(kShellWindowId_StatusContainer);
 838   shelf_.reset(new ShelfWidget(
 839       shelf_container, status_container, workspace_controller()));
 840
 841   if (!Shell::GetInstance()->session_state_delegate()->
 842       IsActiveUserSessionStarted()) {
 843     // This window exists only to be a event target on login screen.
 844     // It does not have to handle events, nor be visible.
 845     mouse_event_target_.reset(new aura::Window(new EmptyWindowDelegate));
 846     mouse_event_target_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
 847
 848     aura::Window* lock_background_container =
 849         GetContainer(kShellWindowId_LockScreenBackgroundContainer);
 850     lock_background_container->AddChild(mouse_event_target_.get());
 851     mouse_event_target_->Show();
 852   }
 853
 854   // Create Docked windows layout manager
 855   aura::Window* docked_container = GetContainer(kShellWindowId_DockedContainer);
 856   docked_layout_manager_ =
 857       new DockedWindowLayoutManager(docked_container, workspace_controller());
 858   docked_container->SetLayoutManager(docked_layout_manager_);
 859
 860   // Create Panel layout manager
 861   aura::Window* panel_container = GetContainer(kShellWindowId_PanelContainer);
 862   panel_layout_manager_ = new PanelLayoutManager(panel_container);
 863   panel_container->SetLayoutManager(panel_layout_manager_);
 864   panel_container_handler_.reset(new PanelWindowEventHandler);
 865   panel_container->AddPreTargetHandler(panel_container_handler_.get());
 866
 867   // Install an AttachedPanelWindowTargeter on the panel container to make it
 868   // easier to correctly target shelf buttons with touch.
 869   gfx::Insets mouse_extend(-kResizeOutsideBoundsSize,
 870                            -kResizeOutsideBoundsSize,
 871                            -kResizeOutsideBoundsSize,
 872                            -kResizeOutsideBoundsSize);
 873   gfx::Insets touch_extend = mouse_extend.Scale(
 874       kResizeOutsideBoundsScaleForTouch);
 875   panel_container->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
 876       new AttachedPanelWindowTargeter(panel_container,
 877                                       mouse_extend,
 878                                       touch_extend,
 879                                       panel_layout_manager_)));
 880 }
 881
 882 void RootWindowController::InitTouchHuds() {
 883   CommandLine* command_line = CommandLine::ForCurrentProcess();
 884   if (command_line->HasSwitch(switches::kAshTouchHud))
 885     set_touch_hud_debug(new TouchHudDebug(GetRootWindow()));
 886   if (Shell::GetInstance()->is_touch_hud_projection_enabled())
 887     EnableTouchHudProjection();
 888 }
 889
 890 void RootWindowController::CreateSystemBackground(
 891     bool is_first_run_after_boot) {
 892   SkColor color = SK_ColorBLACK;
 893 #if defined(OS_CHROMEOS)
 894   if (is_first_run_after_boot)
 895     color = kChromeOsBootColor;
 896 #endif
 897   system_background_.reset(
 898       new SystemBackgroundController(GetRootWindow(), color));
 899
 900 #if defined(OS_CHROMEOS)
 901   // Make a copy of the system's boot splash screen so we can composite it
 902   // onscreen until the desktop background is ready.
 903   if (is_first_run_after_boot &&
 904       (CommandLine::ForCurrentProcess()->HasSwitch(
 905            switches::kAshCopyHostBackgroundAtBoot) ||
 906        CommandLine::ForCurrentProcess()->HasSwitch(
 907            switches::kAshAnimateFromBootSplashScreen)))
 908     boot_splash_screen_.reset(new BootSplashScreen(GetHost()));
 909 #endif
 910 }
 911
 912 void RootWindowController::CreateContainersInRootWindow(
 913     aura::Window* root_window) {
 914   // These containers are just used by PowerButtonController to animate groups
 915   // of containers simultaneously without messing up the current transformations
 916   // on those containers. These are direct children of the root window; all of
 917   // the other containers are their children.
 918
 919   // The desktop background container is not part of the lock animation, so it
 920   // is not included in those animate groups.
 921   // When screen is locked desktop background is moved to lock screen background
 922   // container (moved back on unlock). We want to make sure that there's an
 923   // opaque layer occluding the non-lock-screen layers.
 924   aura::Window* desktop_background_container = CreateContainer(
 925       kShellWindowId_DesktopBackgroundContainer,
 926       "DesktopBackgroundContainer",
 927       root_window);
 928   ::wm::SetChildWindowVisibilityChangesAnimated(desktop_background_container);
 929
 930   aura::Window* non_lock_screen_containers = CreateContainer(
 931       kShellWindowId_NonLockScreenContainersContainer,
 932       "NonLockScreenContainersContainer",
 933       root_window);
 934
 935   aura::Window* lock_background_containers = CreateContainer(
 936       kShellWindowId_LockScreenBackgroundContainer,
 937       "LockScreenBackgroundContainer",
 938       root_window);
 939   ::wm::SetChildWindowVisibilityChangesAnimated(lock_background_containers);
 940
 941   aura::Window* lock_screen_containers = CreateContainer(
 942       kShellWindowId_LockScreenContainersContainer,
 943       "LockScreenContainersContainer",
 944       root_window);
 945   aura::Window* lock_screen_related_containers = CreateContainer(
 946       kShellWindowId_LockScreenRelatedContainersContainer,
 947       "LockScreenRelatedContainersContainer",
 948       root_window);
 949
 950   CreateContainer(kShellWindowId_UnparentedControlContainer,
 951                   "UnparentedControlContainer",
 952                   non_lock_screen_containers);
 953
 954   aura::Window* default_container = CreateContainer(
 955       kShellWindowId_DefaultContainer,
 956       "DefaultContainer",
 957       non_lock_screen_containers);
 958   ::wm::SetChildWindowVisibilityChangesAnimated(default_container);
 959   SetUsesScreenCoordinates(default_container);
 960   SetUsesEasyResizeTargeter(default_container);
 961
 962   aura::Window* always_on_top_container = CreateContainer(
 963       kShellWindowId_AlwaysOnTopContainer,
 964       "AlwaysOnTopContainer",
 965       non_lock_screen_containers);
 966   ::wm::SetChildWindowVisibilityChangesAnimated(always_on_top_container);
 967   SetUsesScreenCoordinates(always_on_top_container);
 968
 969   aura::Window* docked_container = CreateContainer(
 970       kShellWindowId_DockedContainer,
 971       "DockedContainer",
 972       non_lock_screen_containers);
 973   ::wm::SetChildWindowVisibilityChangesAnimated(docked_container);
 974   SetUsesScreenCoordinates(docked_container);
 975   SetUsesEasyResizeTargeter(docked_container);
 976
 977   aura::Window* shelf_container =
 978       CreateContainer(kShellWindowId_ShelfContainer,
 979                       "ShelfContainer",
 980                       non_lock_screen_containers);
 981   SetUsesScreenCoordinates(shelf_container);
 982   DescendantShouldStayInSameRootWindow(shelf_container);
 983
 984   aura::Window* panel_container = CreateContainer(
 985       kShellWindowId_PanelContainer,
 986       "PanelContainer",
 987       non_lock_screen_containers);
 988   SetUsesScreenCoordinates(panel_container);
 989
 990   aura::Window* shelf_bubble_container =
 991       CreateContainer(kShellWindowId_ShelfBubbleContainer,
 992                       "ShelfBubbleContainer",
 993                       non_lock_screen_containers);
 994   SetUsesScreenCoordinates(shelf_bubble_container);
 995   DescendantShouldStayInSameRootWindow(shelf_bubble_container);
 996
 997   aura::Window* app_list_container =
 998       CreateContainer(kShellWindowId_AppListContainer,
 999                       "AppListContainer",
1000                       non_lock_screen_containers);
1001   SetUsesScreenCoordinates(app_list_container);
1002
1003   aura::Window* modal_container = CreateContainer(
1004       kShellWindowId_SystemModalContainer,
1005       "SystemModalContainer",
1006       non_lock_screen_containers);
1007   modal_container->SetLayoutManager(
1008       new SystemModalContainerLayoutManager(modal_container));
1009   ::wm::SetChildWindowVisibilityChangesAnimated(modal_container);
1010   SetUsesScreenCoordinates(modal_container);
1011   SetUsesEasyResizeTargeter(modal_container);
1012
1013   // TODO(beng): Figure out if we can make this use
1014   // SystemModalContainerEventFilter instead of stops_event_propagation.
1015   aura::Window* lock_container = CreateContainer(
1016       kShellWindowId_LockScreenContainer,
1017       "LockScreenContainer",
1018       lock_screen_containers);
1019   if (CommandLine::ForCurrentProcess()->HasSwitch(
1020           switches::kAshDisableLockLayoutManager)) {
1021     lock_container->SetLayoutManager(
1022             new WorkspaceLayoutManager(lock_container));
1023   } else {
1024     lock_container->SetLayoutManager(new LockLayoutManager(lock_container));
1025   }
1026   SetUsesScreenCoordinates(lock_container);
1027   // TODO(beng): stopsevents
1028
1029   aura::Window* lock_modal_container = CreateContainer(
1030       kShellWindowId_LockSystemModalContainer,
1031       "LockSystemModalContainer",
1032       lock_screen_containers);
1033   lock_modal_container->SetLayoutManager(
1034       new SystemModalContainerLayoutManager(lock_modal_container));
1035   ::wm::SetChildWindowVisibilityChangesAnimated(lock_modal_container);
1036   SetUsesScreenCoordinates(lock_modal_container);
1037   SetUsesEasyResizeTargeter(lock_modal_container);
1038
1039   aura::Window* status_container =
1040       CreateContainer(kShellWindowId_StatusContainer,
1041                       "StatusContainer",
1042                       lock_screen_related_containers);
1043   SetUsesScreenCoordinates(status_container);
1044   DescendantShouldStayInSameRootWindow(status_container);
1045
1046   aura::Window* settings_bubble_container = CreateContainer(
1047       kShellWindowId_SettingBubbleContainer,
1048       "SettingBubbleContainer",
1049       lock_screen_related_containers);
1050   ::wm::SetChildWindowVisibilityChangesAnimated(settings_bubble_container);
1051   SetUsesScreenCoordinates(settings_bubble_container);
1052   DescendantShouldStayInSameRootWindow(settings_bubble_container);
1053
1054   aura::Window* menu_container = CreateContainer(
1055       kShellWindowId_MenuContainer,
1056       "MenuContainer",
1057       lock_screen_related_containers);
1058   ::wm::SetChildWindowVisibilityChangesAnimated(menu_container);
1059   SetUsesScreenCoordinates(menu_container);
1060
1061   aura::Window* drag_drop_container = CreateContainer(
1062       kShellWindowId_DragImageAndTooltipContainer,
1063       "DragImageAndTooltipContainer",
1064       lock_screen_related_containers);
1065   ::wm::SetChildWindowVisibilityChangesAnimated(drag_drop_container);
1066   SetUsesScreenCoordinates(drag_drop_container);
1067
1068   aura::Window* overlay_container = CreateContainer(
1069       kShellWindowId_OverlayContainer,
1070       "OverlayContainer",
1071       lock_screen_related_containers);
1072   SetUsesScreenCoordinates(overlay_container);
1073
1074   aura::Window* virtual_keyboard_parent_container = CreateContainer(
1075       kShellWindowId_VirtualKeyboardParentContainer,
1076       "VirtualKeyboardParentContainer",
1077       root_window);
1078   SetUsesScreenCoordinates(virtual_keyboard_parent_container);
1079
1080 #if defined(OS_CHROMEOS)
1081   aura::Window* mouse_cursor_container = CreateContainer(
1082       kShellWindowId_MouseCursorContainer,
1083       "MouseCursorContainer",
1084       root_window);
1085   SetUsesScreenCoordinates(mouse_cursor_container);
1086 #endif
1087
1088   CreateContainer(kShellWindowId_PowerButtonAnimationContainer,
1089                   "PowerButtonAnimationContainer", root_window);
1090 }
1091
1092 void RootWindowController::EnableTouchHudProjection() {
1093   if (touch_hud_projection_)
1094     return;
1095   set_touch_hud_projection(new TouchHudProjection(GetRootWindow()));
1096 }
1097
1098 void RootWindowController::DisableTouchHudProjection() {
1099   if (!touch_hud_projection_)
1100     return;
1101   touch_hud_projection_->Remove();
1102 }
1103
1104 void RootWindowController::OnLoginStateChanged(user::LoginStatus status) {
1105   shelf_->shelf_layout_manager()->UpdateVisibilityState();
1106 }
1107
1108 void RootWindowController::OnTouchHudProjectionToggled(bool enabled) {
1109   if (enabled)
1110     EnableTouchHudProjection();
1111   else
1112     DisableTouchHudProjection();
1113 }
1114
1115 RootWindowController* GetRootWindowController(
1116     const aura::Window* root_window) {
1117   return root_window ? GetRootWindowSettings(root_window)->controller : NULL;
1118 }
1119
1120 }  // namespace ash