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