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/ash_touch_exploration_manager_chromeos.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 }  // namespace
 265
 266 void RootWindowController::CreateForPrimaryDisplay(AshWindowTreeHost* host) {
 267   RootWindowController* controller = new RootWindowController(host);
 268   controller->Init(RootWindowController::PRIMARY,
 269                    Shell::GetInstance()->delegate()->IsFirstRunAfterBoot());
 270 }
 271
 272 void RootWindowController::CreateForSecondaryDisplay(AshWindowTreeHost* host) {
 273   RootWindowController* controller = new RootWindowController(host);
 274   controller->Init(RootWindowController::SECONDARY, false /* first run */);
 275 }
 276
 277 void RootWindowController::CreateForVirtualKeyboardDisplay(
 278     AshWindowTreeHost* host) {
 279   RootWindowController* controller = new RootWindowController(host);
 280   controller->Init(RootWindowController::VIRTUAL_KEYBOARD,
 281                    false /* first run */);
 282 }
 283
 284 // static
 285 RootWindowController* RootWindowController::ForShelf(
 286     const aura::Window* window) {
 287   return GetRootWindowController(window->GetRootWindow());
 288 }
 289
 290 // static
 291 RootWindowController* RootWindowController::ForWindow(
 292     const aura::Window* window) {
 293   return GetRootWindowController(window->GetRootWindow());
 294 }
 295
 296 // static
 297 RootWindowController* RootWindowController::ForTargetRootWindow() {
 298   return GetRootWindowController(Shell::GetTargetRootWindow());
 299 }
 300
 301 // static
 302 aura::Window* RootWindowController::GetContainerForWindow(
 303     aura::Window* window) {
 304   aura::Window* container = window->parent();
 305   while (container && container->type() != ui::wm::WINDOW_TYPE_UNKNOWN)
 306     container = container->parent();
 307   return container;
 308 }
 309
 310 RootWindowController::~RootWindowController() {
 311   Shutdown();
 312   ash_host_.reset();
 313   // The CaptureClient needs to be around for as long as the RootWindow is
 314   // valid.
 315   capture_client_.reset();
 316 }
 317
 318 aura::WindowTreeHost* RootWindowController::GetHost() {
 319   return ash_host_->AsWindowTreeHost();
 320 }
 321
 322 const aura::WindowTreeHost* RootWindowController::GetHost() const {
 323   return ash_host_->AsWindowTreeHost();
 324 }
 325
 326 aura::Window* RootWindowController::GetRootWindow() {
 327   return GetHost()->window();
 328 }
 329
 330 const aura::Window* RootWindowController::GetRootWindow() const {
 331   return GetHost()->window();
 332 }
 333
 334 void RootWindowController::SetWallpaperController(
 335     DesktopBackgroundWidgetController* controller) {
 336   wallpaper_controller_.reset(controller);
 337 }
 338
 339 void RootWindowController::SetAnimatingWallpaperController(
 340     AnimatingDesktopController* controller) {
 341   if (animating_wallpaper_controller_.get())
 342     animating_wallpaper_controller_->StopAnimating();
 343   animating_wallpaper_controller_.reset(controller);
 344 }
 345
 346 void RootWindowController::Shutdown() {
 347   Shell* shell = Shell::GetInstance();
 348   shell->RemoveShellObserver(this);
 349
 350 #if defined(OS_CHROMEOS)
 351   if (touch_exploration_manager_) {
 352     touch_exploration_manager_.reset();
 353   }
 354 #endif
 355
 356   if (animating_wallpaper_controller_.get())
 357     animating_wallpaper_controller_->StopAnimating();
 358   wallpaper_controller_.reset();
 359   animating_wallpaper_controller_.reset();
 360   aura::Window* root_window = GetRootWindow();
 361   // Change the target root window before closing child windows. If any child
 362   // being removed triggers a relayout of the shelf it will try to build a
 363   // window list adding windows from the target root window's containers which
 364   // may have already gone away.
 365   if (Shell::GetTargetRootWindow() == root_window) {
 366     shell->set_target_root_window(
 367         Shell::GetPrimaryRootWindow() == root_window
 368             ? NULL
 369             : Shell::GetPrimaryRootWindow());
 370   }
 371
 372   CloseChildWindows();
 373   GetRootWindowSettings(root_window)->controller = NULL;
 374   screen_dimmer_.reset();
 375   workspace_controller_.reset();
 376   // Forget with the display ID so that display lookup
 377   // ends up with invalid display.
 378   GetRootWindowSettings(root_window)->display_id =
 379       gfx::Display::kInvalidDisplayID;
 380   ash_host_->PrepareForShutdown();
 381
 382   system_background_.reset();
 383   aura::client::SetScreenPositionClient(root_window, NULL);
 384 }
 385
 386 SystemModalContainerLayoutManager*
 387 RootWindowController::GetSystemModalLayoutManager(aura::Window* window) {
 388   aura::Window* modal_container = NULL;
 389   if (window) {
 390     aura::Window* window_container = GetContainerForWindow(window);
 391     if (window_container &&
 392         window_container->id() >= kShellWindowId_LockScreenContainer) {
 393       modal_container = GetContainer(kShellWindowId_LockSystemModalContainer);
 394     } else {
 395       modal_container = GetContainer(kShellWindowId_SystemModalContainer);
 396     }
 397   } else {
 398     int modal_window_id = Shell::GetInstance()->session_state_delegate()
 399         ->IsUserSessionBlocked() ? kShellWindowId_LockSystemModalContainer :
 400                                    kShellWindowId_SystemModalContainer;
 401     modal_container = GetContainer(modal_window_id);
 402   }
 403   return modal_container ? static_cast<SystemModalContainerLayoutManager*>(
 404       modal_container->layout_manager()) : NULL;
 405 }
 406
 407 aura::Window* RootWindowController::GetContainer(int container_id) {
 408   return GetRootWindow()->GetChildById(container_id);
 409 }
 410
 411 const aura::Window* RootWindowController::GetContainer(int container_id) const {
 412   return ash_host_->AsWindowTreeHost()->window()->GetChildById(container_id);
 413 }
 414
 415 void RootWindowController::ShowShelf() {
 416   if (!shelf_->shelf())
 417     return;
 418   shelf_->shelf()->SetVisible(true);
 419   shelf_->status_area_widget()->Show();
 420 }
 421
 422 void RootWindowController::OnShelfCreated() {
 423   if (panel_layout_manager_)
 424     panel_layout_manager_->SetShelf(shelf_->shelf());
 425   if (docked_layout_manager_) {
 426     docked_layout_manager_->SetShelf(shelf_->shelf());
 427     if (shelf_->shelf_layout_manager())
 428       docked_layout_manager_->AddObserver(shelf_->shelf_layout_manager());
 429   }
 430
 431   // Notify shell observers that the shelf has been created.
 432   Shell::GetInstance()->OnShelfCreatedForRootWindow(GetRootWindow());
 433 }
 434
 435 void RootWindowController::UpdateAfterLoginStatusChange(
 436     user::LoginStatus status) {
 437   if (status != user::LOGGED_IN_NONE)
 438     mouse_event_target_.reset();
 439   if (shelf_->status_area_widget())
 440     shelf_->status_area_widget()->UpdateAfterLoginStatusChange(status);
 441 }
 442
 443 void RootWindowController::HandleInitialDesktopBackgroundAnimationStarted() {
 444 #if defined(OS_CHROMEOS)
 445   if (CommandLine::ForCurrentProcess()->HasSwitch(
 446           switches::kAshAnimateFromBootSplashScreen) &&
 447       boot_splash_screen_.get()) {
 448     // Make the splash screen fade out so it doesn't obscure the desktop
 449     // wallpaper's brightness/grayscale animation.
 450     boot_splash_screen_->StartHideAnimation(
 451         base::TimeDelta::FromMilliseconds(kBootSplashScreenHideDurationMs));
 452   }
 453 #endif
 454 }
 455
 456 void RootWindowController::OnWallpaperAnimationFinished(views::Widget* widget) {
 457   // Make sure the wallpaper is visible.
 458   system_background_->SetColor(SK_ColorBLACK);
 459 #if defined(OS_CHROMEOS)
 460   boot_splash_screen_.reset();
 461 #endif
 462
 463   Shell::GetInstance()->user_wallpaper_delegate()->
 464       OnWallpaperAnimationFinished();
 465   // Only removes old component when wallpaper animation finished. If we
 466   // remove the old one before the new wallpaper is done fading in there will
 467   // be a white flash during the animation.
 468   if (animating_wallpaper_controller()) {
 469     DesktopBackgroundWidgetController* controller =
 470         animating_wallpaper_controller()->GetController(true);
 471     // |desktop_widget_| should be the same animating widget we try to move
 472     // to |kDesktopController|. Otherwise, we may close |desktop_widget_|
 473     // before move it to |kDesktopController|.
 474     DCHECK_EQ(controller->widget(), widget);
 475     // Release the old controller and close its background widget.
 476     SetWallpaperController(controller);
 477   }
 478 }
 479
 480 void RootWindowController::CloseChildWindows() {
 481   mouse_event_target_.reset();
 482
 483   // Remove observer as deactivating keyboard causes |docked_layout_manager_|
 484   // to fire notifications.
 485   if (docked_layout_manager_ && shelf_ && shelf_->shelf_layout_manager())
 486     docked_layout_manager_->RemoveObserver(shelf_->shelf_layout_manager());
 487
 488   // Deactivate keyboard container before closing child windows and shutting
 489   // down associated layout managers.
 490   DeactivateKeyboard(keyboard::KeyboardController::GetInstance());
 491
 492   // panel_layout_manager_ needs to be shut down before windows are destroyed.
 493   if (panel_layout_manager_) {
 494     panel_layout_manager_->Shutdown();
 495     panel_layout_manager_ = NULL;
 496   }
 497   // docked_layout_manager_ needs to be shut down before windows are destroyed.
 498   if (docked_layout_manager_) {
 499     docked_layout_manager_->Shutdown();
 500     docked_layout_manager_ = NULL;
 501   }
 502   aura::Window* root_window = GetRootWindow();
 503   aura::client::SetDragDropClient(root_window, NULL);
 504
 505   // TODO(harrym): Remove when Status Area Widget is a child view.
 506   if (shelf_) {
 507     shelf_->ShutdownStatusAreaWidget();
 508
 509     if (shelf_->shelf_layout_manager())
 510       shelf_->shelf_layout_manager()->PrepareForShutdown();
 511   }
 512
 513   // Close background widget first as it depends on tooltip.
 514   wallpaper_controller_.reset();
 515   animating_wallpaper_controller_.reset();
 516
 517   workspace_controller_.reset();
 518   aura::client::SetTooltipClient(root_window, NULL);
 519
 520   // Explicitly destroy top level windows. We do this as during part of
 521   // destruction such windows may query the RootWindow for state.
 522   std::queue<aura::Window*> non_toplevel_windows;
 523   non_toplevel_windows.push(root_window);
 524   while (!non_toplevel_windows.empty()) {
 525     aura::Window* non_toplevel_window = non_toplevel_windows.front();
 526     non_toplevel_windows.pop();
 527     aura::WindowTracker toplevel_windows;
 528     for (size_t i = 0; i < non_toplevel_window->children().size(); ++i) {
 529       aura::Window* child = non_toplevel_window->children()[i];
 530       if (!child->owned_by_parent())
 531         continue;
 532       if (child->delegate())
 533         toplevel_windows.Add(child);
 534       else
 535         non_toplevel_windows.push(child);
 536     }
 537     while (!toplevel_windows.windows().empty())
 538       delete *toplevel_windows.windows().begin();
 539   }
 540   // And then remove the containers.
 541   while (!root_window->children().empty()) {
 542     aura::Window* window = root_window->children()[0];
 543     if (window->owned_by_parent()) {
 544       delete window;
 545     } else {
 546       root_window->RemoveChild(window);
 547     }
 548   }
 549
 550   shelf_.reset();
 551 }
 552
 553 void RootWindowController::MoveWindowsTo(aura::Window* dst) {
 554   // Forget the shelf early so that shelf don't update itself using wrong
 555   // display info.
 556   workspace_controller_->SetShelf(NULL);
 557   ReparentAllWindows(GetRootWindow(), dst);
 558 }
 559
 560 ShelfLayoutManager* RootWindowController::GetShelfLayoutManager() {
 561   return shelf_->shelf_layout_manager();
 562 }
 563
 564 SystemTray* RootWindowController::GetSystemTray() {
 565   // We assume in throughout the code that this will not return NULL. If code
 566   // triggers this for valid reasons, it should test status_area_widget first.
 567   CHECK(shelf_->status_area_widget());
 568   return shelf_->status_area_widget()->system_tray();
 569 }
 570
 571 void RootWindowController::ShowContextMenu(const gfx::Point& location_in_screen,
 572                                            ui::MenuSourceType source_type) {
 573   DCHECK(Shell::GetInstance()->delegate());
 574   scoped_ptr<ui::MenuModel> menu_model(
 575       Shell::GetInstance()->delegate()->CreateContextMenu(
 576           GetRootWindow(), NULL, NULL));
 577   if (!menu_model)
 578     return;
 579
 580   // Background controller may not be set yet if user clicked on status are
 581   // before initial animation completion. See crbug.com/222218
 582   if (!wallpaper_controller_.get())
 583     return;
 584
 585   views::MenuRunner menu_runner(menu_model.get(),
 586                                 views::MenuRunner::CONTEXT_MENU);
 587   if (menu_runner.RunMenuAt(wallpaper_controller_->widget(),
 588                             NULL,
 589                             gfx::Rect(location_in_screen, gfx::Size()),
 590                             views::MENU_ANCHOR_TOPLEFT,
 591                             source_type) == views::MenuRunner::MENU_DELETED) {
 592     return;
 593   }
 594
 595   Shell::GetInstance()->UpdateShelfVisibility();
 596 }
 597
 598 void RootWindowController::UpdateShelfVisibility() {
 599   shelf_->shelf_layout_manager()->UpdateVisibilityState();
 600 }
 601
 602 const aura::Window* RootWindowController::GetWindowForFullscreenMode() const {
 603   const aura::Window* topmost_window = NULL;
 604   const aura::Window* active_window = wm::GetActiveWindow();
 605   if (active_window && active_window->GetRootWindow() == GetRootWindow() &&
 606       IsSwitchableContainer(active_window->parent())) {
 607     // Use the active window when it is on the current root window to determine
 608     // the fullscreen state to allow temporarily using a panel or docked window
 609     // (which are always above the default container) while a fullscreen
 610     // window is open. We only use the active window when in a switchable
 611     // container as the launcher should not exit fullscreen mode.
 612     topmost_window = active_window;
 613   } else {
 614     // Otherwise, use the topmost window on the root window's default container
 615     // when there is no active window on this root window.
 616     const aura::Window::Windows& windows =
 617         GetContainer(kShellWindowId_DefaultContainer)->children();
 618     for (aura::Window::Windows::const_reverse_iterator iter = windows.rbegin();
 619          iter != windows.rend(); ++iter) {
 620       if (((*iter)->type() == ui::wm::WINDOW_TYPE_NORMAL ||
 621            (*iter)->type() == ui::wm::WINDOW_TYPE_PANEL) &&
 622           (*iter)->layer()->GetTargetVisibility()) {
 623         topmost_window = *iter;
 624         break;
 625       }
 626     }
 627   }
 628   while (topmost_window) {
 629     if (wm::GetWindowState(topmost_window)->IsFullscreen())
 630       return topmost_window;
 631     topmost_window = ::wm::GetTransientParent(topmost_window);
 632   }
 633   return NULL;
 634 }
 635
 636 void RootWindowController::ActivateKeyboard(
 637     keyboard::KeyboardController* keyboard_controller) {
 638   if (!keyboard::IsKeyboardEnabled() ||
 639       GetContainer(kShellWindowId_VirtualKeyboardContainer)) {
 640     return;
 641   }
 642   DCHECK(keyboard_controller);
 643   if (!keyboard::IsKeyboardUsabilityExperimentEnabled()) {
 644     keyboard_controller->AddObserver(shelf()->shelf_layout_manager());
 645     keyboard_controller->AddObserver(panel_layout_manager_);
 646     keyboard_controller->AddObserver(docked_layout_manager_);
 647     keyboard_controller->AddObserver(workspace_controller_->layout_manager());
 648     Shell::GetInstance()->delegate()->VirtualKeyboardActivated(true);
 649   }
 650   aura::Window* parent = GetContainer(
 651       kShellWindowId_VirtualKeyboardParentContainer);
 652   DCHECK(parent);
 653   aura::Window* keyboard_container =
 654       keyboard_controller->GetContainerWindow();
 655   keyboard_container->set_id(kShellWindowId_VirtualKeyboardContainer);
 656   parent->AddChild(keyboard_container);
 657   // TODO(oshima): Bounds of keyboard container should be handled by
 658   // RootWindowLayoutManager. Remove this after fixed RootWindowLayoutManager.
 659   keyboard_container->SetBounds(parent->bounds());
 660 }
 661
 662 void RootWindowController::DeactivateKeyboard(
 663     keyboard::KeyboardController* keyboard_controller) {
 664   if (!keyboard_controller ||
 665       !keyboard_controller->keyboard_container_initialized()) {
 666     return;
 667   }
 668   aura::Window* keyboard_container =
 669       keyboard_controller->GetContainerWindow();
 670   if (keyboard_container->GetRootWindow() == GetRootWindow()) {
 671     aura::Window* parent = GetContainer(
 672         kShellWindowId_VirtualKeyboardParentContainer);
 673     DCHECK(parent);
 674     parent->RemoveChild(keyboard_container);
 675     if (!keyboard::IsKeyboardUsabilityExperimentEnabled()) {
 676       // Virtual keyboard may be deactivated while still showing, notify all
 677       // observers that keyboard bounds changed to 0 before remove them.
 678       keyboard_controller->NotifyKeyboardBoundsChanging(gfx::Rect());
 679       keyboard_controller->RemoveObserver(shelf()->shelf_layout_manager());
 680       keyboard_controller->RemoveObserver(panel_layout_manager_);
 681       keyboard_controller->RemoveObserver(docked_layout_manager_);
 682       keyboard_controller->RemoveObserver(
 683           workspace_controller_->layout_manager());
 684       Shell::GetInstance()->delegate()->VirtualKeyboardActivated(false);
 685     }
 686   }
 687 }
 688
 689 bool RootWindowController::IsVirtualKeyboardWindow(aura::Window* window) {
 690   aura::Window* parent = GetContainer(
 691       kShellWindowId_VirtualKeyboardParentContainer);
 692   return parent ? parent->Contains(window) : false;
 693 }
 694
 695 ////////////////////////////////////////////////////////////////////////////////
 696 // RootWindowController, private:
 697
 698 RootWindowController::RootWindowController(AshWindowTreeHost* ash_host)
 699     : ash_host_(ash_host),
 700       root_window_layout_(NULL),
 701       docked_layout_manager_(NULL),
 702       panel_layout_manager_(NULL),
 703       touch_hud_debug_(NULL),
 704       touch_hud_projection_(NULL) {
 705   aura::Window* root_window = GetRootWindow();
 706   GetRootWindowSettings(root_window)->controller = this;
 707   screen_dimmer_.reset(new ScreenDimmer(root_window));
 708
 709   stacking_controller_.reset(new StackingController);
 710   aura::client::SetWindowTreeClient(root_window, stacking_controller_.get());
 711   capture_client_.reset(new ::wm::ScopedCaptureClient(root_window));
 712 }
 713
 714 void RootWindowController::Init(RootWindowType root_window_type,
 715                                 bool first_run_after_boot) {
 716   aura::Window* root_window = GetRootWindow();
 717   Shell* shell = Shell::GetInstance();
 718   shell->InitRootWindow(root_window);
 719
 720   ash_host_->AsWindowTreeHost()->SetCursor(ui::kCursorPointer);
 721   CreateContainersInRootWindow(root_window);
 722
 723   if (root_window_type == VIRTUAL_KEYBOARD) {
 724     aura::Window* virtual_keyboard_parent_container = GetContainer(
 725         kShellWindowId_VirtualKeyboardParentContainer);
 726     virtual_keyboard_parent_container->SetBounds(root_window->bounds());
 727     shell->InitKeyboard();
 728     return;
 729   }
 730
 731   CreateSystemBackground(first_run_after_boot);
 732
 733   InitLayoutManagers();
 734   InitTouchHuds();
 735
 736   if (Shell::GetPrimaryRootWindowController()->
 737       GetSystemModalLayoutManager(NULL)->has_modal_background()) {
 738     GetSystemModalLayoutManager(NULL)->CreateModalBackground();
 739   }
 740
 741   shell->AddShellObserver(this);
 742
 743   if (root_window_type == PRIMARY) {
 744     root_window_layout()->OnWindowResized();
 745     if (!keyboard::IsKeyboardUsabilityExperimentEnabled())
 746       shell->InitKeyboard();
 747   } else {
 748     root_window_layout()->OnWindowResized();
 749     ash_host_->AsWindowTreeHost()->Show();
 750
 751     // Create a shelf if a user is already logged in.
 752     if (shell->session_state_delegate()->NumberOfLoggedInUsers())
 753       shelf()->CreateShelf();
 754
 755     // Notify shell observers about new root window.
 756     shell->OnRootWindowAdded(root_window);
 757   }
 758
 759 #if defined(OS_CHROMEOS)
 760   if (!CommandLine::ForCurrentProcess()->HasSwitch(
 761           switches::kAshDisableTouchExplorationMode)) {
 762     touch_exploration_manager_.reset(new AshTouchExplorationManager(this));
 763   }
 764 #endif
 765 }
 766
 767 void RootWindowController::InitLayoutManagers() {
 768   aura::Window* root_window = GetRootWindow();
 769   root_window_layout_ = new RootWindowLayoutManager(root_window);
 770   root_window->SetLayoutManager(root_window_layout_);
 771
 772   aura::Window* default_container =
 773       GetContainer(kShellWindowId_DefaultContainer);
 774   // Workspace manager has its own layout managers.
 775   workspace_controller_.reset(
 776       new WorkspaceController(default_container));
 777
 778   aura::Window* always_on_top_container =
 779       GetContainer(kShellWindowId_AlwaysOnTopContainer);
 780   always_on_top_container->SetLayoutManager(
 781       new WorkspaceLayoutManager(always_on_top_container));
 782   always_on_top_controller_.reset(new AlwaysOnTopController);
 783   always_on_top_controller_->SetAlwaysOnTopContainer(always_on_top_container);
 784
 785   DCHECK(!shelf_.get());
 786   aura::Window* shelf_container = GetContainer(kShellWindowId_ShelfContainer);
 787   // TODO(harrym): Remove when status area is view.
 788   aura::Window* status_container = GetContainer(kShellWindowId_StatusContainer);
 789   shelf_.reset(new ShelfWidget(
 790       shelf_container, status_container, workspace_controller()));
 791
 792   if (!Shell::GetInstance()->session_state_delegate()->
 793       IsActiveUserSessionStarted()) {
 794     // This window exists only to be a event target on login screen.
 795     // It does not have to handle events, nor be visible.
 796     mouse_event_target_.reset(new aura::Window(new EmptyWindowDelegate));
 797     mouse_event_target_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
 798
 799     aura::Window* lock_background_container =
 800         GetContainer(kShellWindowId_LockScreenBackgroundContainer);
 801     lock_background_container->AddChild(mouse_event_target_.get());
 802     mouse_event_target_->Show();
 803   }
 804
 805   // Create Docked windows layout manager
 806   aura::Window* docked_container = GetContainer(kShellWindowId_DockedContainer);
 807   docked_layout_manager_ =
 808       new DockedWindowLayoutManager(docked_container, workspace_controller());
 809   docked_container->SetLayoutManager(docked_layout_manager_);
 810
 811   // Installs SnapLayoutManager to containers who set the
 812   // |kSnapsChildrenToPhysicalPixelBoundary| property.
 813   wm::InstallSnapLayoutManagerToContainers(root_window);
 814
 815   // Create Panel layout manager
 816   aura::Window* panel_container = GetContainer(kShellWindowId_PanelContainer);
 817   panel_layout_manager_ = new PanelLayoutManager(panel_container);
 818   panel_container->SetLayoutManager(panel_layout_manager_);
 819   panel_container_handler_.reset(new PanelWindowEventHandler);
 820   panel_container->AddPreTargetHandler(panel_container_handler_.get());
 821
 822   // Install an AttachedPanelWindowTargeter on the panel container to make it
 823   // easier to correctly target shelf buttons with touch.
 824   gfx::Insets mouse_extend(-kResizeOutsideBoundsSize,
 825                            -kResizeOutsideBoundsSize,
 826                            -kResizeOutsideBoundsSize,
 827                            -kResizeOutsideBoundsSize);
 828   gfx::Insets touch_extend = mouse_extend.Scale(
 829       kResizeOutsideBoundsScaleForTouch);
 830   panel_container->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
 831       new AttachedPanelWindowTargeter(panel_container,
 832                                       mouse_extend,
 833                                       touch_extend,
 834                                       panel_layout_manager_)));
 835 }
 836
 837 void RootWindowController::InitTouchHuds() {
 838   CommandLine* command_line = CommandLine::ForCurrentProcess();
 839   if (command_line->HasSwitch(switches::kAshTouchHud))
 840     set_touch_hud_debug(new TouchHudDebug(GetRootWindow()));
 841   if (Shell::GetInstance()->is_touch_hud_projection_enabled())
 842     EnableTouchHudProjection();
 843 }
 844
 845 void RootWindowController::CreateSystemBackground(
 846     bool is_first_run_after_boot) {
 847   SkColor color = SK_ColorBLACK;
 848 #if defined(OS_CHROMEOS)
 849   if (is_first_run_after_boot)
 850     color = kChromeOsBootColor;
 851 #endif
 852   system_background_.reset(
 853       new SystemBackgroundController(GetRootWindow(), color));
 854
 855 #if defined(OS_CHROMEOS)
 856   // Make a copy of the system's boot splash screen so we can composite it
 857   // onscreen until the desktop background is ready.
 858   if (is_first_run_after_boot &&
 859       (CommandLine::ForCurrentProcess()->HasSwitch(
 860            switches::kAshCopyHostBackgroundAtBoot) ||
 861        CommandLine::ForCurrentProcess()->HasSwitch(
 862            switches::kAshAnimateFromBootSplashScreen)))
 863     boot_splash_screen_.reset(new BootSplashScreen(GetHost()));
 864 #endif
 865 }
 866
 867 void RootWindowController::CreateContainersInRootWindow(
 868     aura::Window* root_window) {
 869   // These containers are just used by PowerButtonController to animate groups
 870   // of containers simultaneously without messing up the current transformations
 871   // on those containers. These are direct children of the root window; all of
 872   // the other containers are their children.
 873
 874   // The desktop background container is not part of the lock animation, so it
 875   // is not included in those animate groups.
 876   // When screen is locked desktop background is moved to lock screen background
 877   // container (moved back on unlock). We want to make sure that there's an
 878   // opaque layer occluding the non-lock-screen layers.
 879   aura::Window* desktop_background_container = CreateContainer(
 880       kShellWindowId_DesktopBackgroundContainer,
 881       "DesktopBackgroundContainer",
 882       root_window);
 883   ::wm::SetChildWindowVisibilityChangesAnimated(desktop_background_container);
 884
 885   aura::Window* non_lock_screen_containers = CreateContainer(
 886       kShellWindowId_NonLockScreenContainersContainer,
 887       "NonLockScreenContainersContainer",
 888       root_window);
 889
 890   aura::Window* lock_background_containers = CreateContainer(
 891       kShellWindowId_LockScreenBackgroundContainer,
 892       "LockScreenBackgroundContainer",
 893       root_window);
 894   ::wm::SetChildWindowVisibilityChangesAnimated(lock_background_containers);
 895
 896   aura::Window* lock_screen_containers = CreateContainer(
 897       kShellWindowId_LockScreenContainersContainer,
 898       "LockScreenContainersContainer",
 899       root_window);
 900   aura::Window* lock_screen_related_containers = CreateContainer(
 901       kShellWindowId_LockScreenRelatedContainersContainer,
 902       "LockScreenRelatedContainersContainer",
 903       root_window);
 904
 905   CreateContainer(kShellWindowId_UnparentedControlContainer,
 906                   "UnparentedControlContainer",
 907                   non_lock_screen_containers);
 908
 909   aura::Window* default_container = CreateContainer(
 910       kShellWindowId_DefaultContainer,
 911       "DefaultContainer",
 912       non_lock_screen_containers);
 913   ::wm::SetChildWindowVisibilityChangesAnimated(default_container);
 914   wm::SetSnapsChildrenToPhysicalPixelBoundary(default_container);
 915   SetUsesScreenCoordinates(default_container);
 916   SetUsesEasyResizeTargeter(default_container);
 917
 918   aura::Window* always_on_top_container = CreateContainer(
 919       kShellWindowId_AlwaysOnTopContainer,
 920       "AlwaysOnTopContainer",
 921       non_lock_screen_containers);
 922   ::wm::SetChildWindowVisibilityChangesAnimated(always_on_top_container);
 923   wm::SetSnapsChildrenToPhysicalPixelBoundary(always_on_top_container);
 924   SetUsesScreenCoordinates(always_on_top_container);
 925
 926   aura::Window* docked_container = CreateContainer(
 927       kShellWindowId_DockedContainer,
 928       "DockedContainer",
 929       non_lock_screen_containers);
 930   ::wm::SetChildWindowVisibilityChangesAnimated(docked_container);
 931   wm::SetSnapsChildrenToPhysicalPixelBoundary(docked_container);
 932   SetUsesScreenCoordinates(docked_container);
 933   SetUsesEasyResizeTargeter(docked_container);
 934
 935   aura::Window* shelf_container =
 936       CreateContainer(kShellWindowId_ShelfContainer,
 937                       "ShelfContainer",
 938                       non_lock_screen_containers);
 939   wm::SetSnapsChildrenToPhysicalPixelBoundary(shelf_container);
 940   SetUsesScreenCoordinates(shelf_container);
 941   DescendantShouldStayInSameRootWindow(shelf_container);
 942
 943   aura::Window* panel_container = CreateContainer(
 944       kShellWindowId_PanelContainer,
 945       "PanelContainer",
 946       non_lock_screen_containers);
 947   wm::SetSnapsChildrenToPhysicalPixelBoundary(panel_container);
 948   SetUsesScreenCoordinates(panel_container);
 949
 950   aura::Window* shelf_bubble_container =
 951       CreateContainer(kShellWindowId_ShelfBubbleContainer,
 952                       "ShelfBubbleContainer",
 953                       non_lock_screen_containers);
 954   wm::SetSnapsChildrenToPhysicalPixelBoundary(shelf_bubble_container);
 955   SetUsesScreenCoordinates(shelf_bubble_container);
 956   DescendantShouldStayInSameRootWindow(shelf_bubble_container);
 957
 958   aura::Window* app_list_container =
 959       CreateContainer(kShellWindowId_AppListContainer,
 960                       "AppListContainer",
 961                       non_lock_screen_containers);
 962   wm::SetSnapsChildrenToPhysicalPixelBoundary(app_list_container);
 963   SetUsesScreenCoordinates(app_list_container);
 964
 965   aura::Window* modal_container = CreateContainer(
 966       kShellWindowId_SystemModalContainer,
 967       "SystemModalContainer",
 968       non_lock_screen_containers);
 969   wm::SetSnapsChildrenToPhysicalPixelBoundary(modal_container);
 970   modal_container->SetLayoutManager(
 971       new SystemModalContainerLayoutManager(modal_container));
 972   ::wm::SetChildWindowVisibilityChangesAnimated(modal_container);
 973   SetUsesScreenCoordinates(modal_container);
 974   SetUsesEasyResizeTargeter(modal_container);
 975
 976   // TODO(beng): Figure out if we can make this use
 977   // SystemModalContainerEventFilter instead of stops_event_propagation.
 978   aura::Window* lock_container = CreateContainer(
 979       kShellWindowId_LockScreenContainer,
 980       "LockScreenContainer",
 981       lock_screen_containers);
 982   wm::SetSnapsChildrenToPhysicalPixelBoundary(lock_container);
 983   if (CommandLine::ForCurrentProcess()->HasSwitch(
 984           switches::kAshDisableLockLayoutManager)) {
 985     lock_container->SetLayoutManager(
 986             new WorkspaceLayoutManager(lock_container));
 987   } else {
 988     lock_container->SetLayoutManager(new LockLayoutManager(lock_container));
 989   }
 990   SetUsesScreenCoordinates(lock_container);
 991   // TODO(beng): stopsevents
 992
 993   aura::Window* lock_modal_container = CreateContainer(
 994       kShellWindowId_LockSystemModalContainer,
 995       "LockSystemModalContainer",
 996       lock_screen_containers);
 997   wm::SetSnapsChildrenToPhysicalPixelBoundary(lock_modal_container);
 998   lock_modal_container->SetLayoutManager(
 999       new SystemModalContainerLayoutManager(lock_modal_container));
1000   ::wm::SetChildWindowVisibilityChangesAnimated(lock_modal_container);
1001   SetUsesScreenCoordinates(lock_modal_container);
1002   SetUsesEasyResizeTargeter(lock_modal_container);
1003
1004   aura::Window* status_container =
1005       CreateContainer(kShellWindowId_StatusContainer,
1006                       "StatusContainer",
1007                       lock_screen_related_containers);
1008   wm::SetSnapsChildrenToPhysicalPixelBoundary(status_container);
1009   SetUsesScreenCoordinates(status_container);
1010   DescendantShouldStayInSameRootWindow(status_container);
1011
1012   aura::Window* settings_bubble_container = CreateContainer(
1013       kShellWindowId_SettingBubbleContainer,
1014       "SettingBubbleContainer",
1015       lock_screen_related_containers);
1016   ::wm::SetChildWindowVisibilityChangesAnimated(settings_bubble_container);
1017   wm::SetSnapsChildrenToPhysicalPixelBoundary(settings_bubble_container);
1018   SetUsesScreenCoordinates(settings_bubble_container);
1019   DescendantShouldStayInSameRootWindow(settings_bubble_container);
1020
1021   aura::Window* menu_container = CreateContainer(
1022       kShellWindowId_MenuContainer,
1023       "MenuContainer",
1024       lock_screen_related_containers);
1025   ::wm::SetChildWindowVisibilityChangesAnimated(menu_container);
1026   wm::SetSnapsChildrenToPhysicalPixelBoundary(menu_container);
1027   SetUsesScreenCoordinates(menu_container);
1028
1029   aura::Window* drag_drop_container = CreateContainer(
1030       kShellWindowId_DragImageAndTooltipContainer,
1031       "DragImageAndTooltipContainer",
1032       lock_screen_related_containers);
1033   ::wm::SetChildWindowVisibilityChangesAnimated(drag_drop_container);
1034   wm::SetSnapsChildrenToPhysicalPixelBoundary(drag_drop_container);
1035   SetUsesScreenCoordinates(drag_drop_container);
1036
1037   aura::Window* overlay_container = CreateContainer(
1038       kShellWindowId_OverlayContainer,
1039       "OverlayContainer",
1040       lock_screen_related_containers);
1041   wm::SetSnapsChildrenToPhysicalPixelBoundary(overlay_container);
1042   SetUsesScreenCoordinates(overlay_container);
1043
1044   aura::Window* virtual_keyboard_parent_container = CreateContainer(
1045       kShellWindowId_VirtualKeyboardParentContainer,
1046       "VirtualKeyboardParentContainer",
1047       root_window);
1048   wm::SetSnapsChildrenToPhysicalPixelBoundary(
1049       virtual_keyboard_parent_container);
1050   SetUsesScreenCoordinates(virtual_keyboard_parent_container);
1051
1052 #if defined(OS_CHROMEOS)
1053   aura::Window* mouse_cursor_container = CreateContainer(
1054       kShellWindowId_MouseCursorContainer,
1055       "MouseCursorContainer",
1056       root_window);
1057   SetUsesScreenCoordinates(mouse_cursor_container);
1058 #endif
1059
1060   CreateContainer(kShellWindowId_PowerButtonAnimationContainer,
1061                   "PowerButtonAnimationContainer", root_window);
1062 }
1063
1064 void RootWindowController::EnableTouchHudProjection() {
1065   if (touch_hud_projection_)
1066     return;
1067   set_touch_hud_projection(new TouchHudProjection(GetRootWindow()));
1068 }
1069
1070 void RootWindowController::DisableTouchHudProjection() {
1071   if (!touch_hud_projection_)
1072     return;
1073   touch_hud_projection_->Remove();
1074 }
1075
1076 void RootWindowController::OnLoginStateChanged(user::LoginStatus status) {
1077   shelf_->shelf_layout_manager()->UpdateVisibilityState();
1078 }
1079
1080 void RootWindowController::OnTouchHudProjectionToggled(bool enabled) {
1081   if (enabled)
1082     EnableTouchHudProjection();
1083   else
1084     DisableTouchHudProjection();
1085 }
1086
1087 RootWindowController* GetRootWindowController(
1088     const aura::Window* root_window) {
1089   return root_window ? GetRootWindowSettings(root_window)->controller : NULL;
1090 }
1091
1092 }  // namespace ash