ash/root_window_controller.cc - chromium/src - Git at Google

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "ash/root_window_controller.h"

 #include <algorithm>
 #include <queue>
 #include <vector>

 #include "ash/ash_constants.h"
 #include "ash/ash_switches.h"
 #include "ash/ash_touch_exploration_manager_chromeos.h"
 #include "ash/aura/aura_layout_manager_adapter.h"
 #include "ash/focus_cycler.h"
 #include "ash/high_contrast/high_contrast_controller.h"
 #include "ash/host/ash_window_tree_host.h"
 #include "ash/login_status.h"
 #include "ash/public/cpp/config.h"
 #include "ash/public/cpp/shelf_types.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_settings.h"
 #include "ash/screen_util.h"
 #include "ash/session/session_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shelf/shelf_window_targeter.h"
 #include "ash/shelf/wm_shelf.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_port.h"
 #include "ash/system/status_area_layout_manager.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/touch/touch_hud_debug.h"
 #include "ash/touch/touch_hud_projection.h"
 #include "ash/touch/touch_observer_hud.h"
 #include "ash/wallpaper/wallpaper_delegate.h"
 #include "ash/wallpaper/wallpaper_widget_controller.h"
 #include "ash/wm/always_on_top_controller.h"
 #include "ash/wm/boot_splash_screen_chromeos.h"
 #include "ash/wm/container_finder.h"
 #include "ash/wm/fullscreen_window_finder.h"
 #include "ash/wm/lock_layout_manager.h"
 #include "ash/wm/panels/attached_panel_window_targeter.h"
 #include "ash/wm/panels/panel_layout_manager.h"
 #include "ash/wm/panels/panel_window_event_handler.h"
 #include "ash/wm/root_window_layout_manager.h"
 #include "ash/wm/stacking_controller.h"
 #include "ash/wm/switchable_windows.h"
 #include "ash/wm/system_modal_container_layout_manager.h"
 #include "ash/wm/system_wallpaper_controller.h"
 #include "ash/wm/window_properties.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_state_aura.h"
 #include "ash/wm/window_util.h"
 #include "ash/wm/wm_screen_util.h"
 #include "ash/wm/workspace/workspace_layout_manager.h"
 #include "ash/wm/workspace_controller.h"
 #include "ash/wm_window.h"
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/time/time.h"
 #include "chromeos/chromeos_switches.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/drag_drop_client.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/mus/window_mus.h"
 #include "ui/aura/mus/window_port_mus.h"
 #include "ui/aura/mus/window_tree_client.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_observer.h"
 #include "ui/aura/window_tracker.h"
 #include "ui/base/models/menu_model.h"
 #include "ui/chromeos/touch_exploration_controller.h"
 #include "ui/display/types/display_constants.h"
 #include "ui/events/event_utils.h"
 #include "ui/keyboard/keyboard_controller.h"
 #include "ui/keyboard/keyboard_util.h"
 #include "ui/views/controls/menu/menu_model_adapter.h"
 #include "ui/views/controls/menu/menu_runner.h"
 #include "ui/views/view_model.h"
 #include "ui/views/view_model_utils.h"
 #include "ui/wm/core/capture_controller.h"
 #include "ui/wm/core/coordinate_conversion.h"
 #include "ui/wm/core/visibility_controller.h"
 #include "ui/wm/core/window_util.h"
 #include "ui/wm/public/tooltip_client.h"
 #include "ui/wm/public/window_types.h"

 namespace ash {
 namespace {

 // Duration for the animation that hides the boot splash screen, in
 // milliseconds.  This should be short enough in relation to
 // wm/window_animation.cc's brightness/grayscale fade animation that the login
 // wallpaper image animation isn't hidden by the splash screen animation.
 const int kBootSplashScreenHideDurationMs = 500;

 bool IsWindowAboveContainer(aura::Window* window,
                             aura::Window* blocking_container) {
   std::vector<aura::Window*> target_path;
   std::vector<aura::Window*> blocking_path;

   while (window) {
     target_path.push_back(window);
     window = window->parent();
   }

   while (blocking_container) {
     blocking_path.push_back(blocking_container);
     blocking_container = blocking_container->parent();
   }

   // The root window is put at the end so that we compare windows at
   // the same depth.
   while (!blocking_path.empty()) {
     if (target_path.empty())
       return false;

     aura::Window* target = target_path.back();
     target_path.pop_back();
     aura::Window* blocking = blocking_path.back();
     blocking_path.pop_back();

     // Still on the same path, continue.
     if (target == blocking)
       continue;

     // This can happen only if unparented window is passed because
     // first element must be the same root.
     if (!target->parent() || !blocking->parent())
       return false;

     aura::Window* common_parent = target->parent();
     DCHECK_EQ(common_parent, blocking->parent());
     aura::Window::Windows windows = common_parent->children();
     auto blocking_iter = std::find(windows.begin(), windows.end(), blocking);
     // If the target window is above blocking window, the window can handle
     // events.
     return std::find(blocking_iter, windows.end(), target) != windows.end();
   }

   return true;
 }

 // Scales |value| that is originally between 0 and |src_max| to be between
 // 0 and |dst_max|.
 float ToRelativeValue(int value, int src_max, int dst_max) {
   return static_cast<float>(value) / static_cast<float>(src_max) * dst_max;
 }

 // Uses ToRelativeValue() to scale the origin of |bounds_in_out|. The
 // width/height are not changed.
 void MoveOriginRelativeToSize(const gfx::Size& src_size,
                               const gfx::Size& dst_size,
                               gfx::Rect* bounds_in_out) {
   gfx::Point origin = bounds_in_out->origin();
   bounds_in_out->set_origin(gfx::Point(
       ToRelativeValue(origin.x(), src_size.width(), dst_size.width()),
       ToRelativeValue(origin.y(), src_size.height(), dst_size.height())));
 }

 // Reparents |window| to |new_parent|.
 void ReparentWindow(aura::Window* window, aura::Window* new_parent) {
   const gfx::Size src_size = window->parent()->bounds().size();
   const gfx::Size dst_size = new_parent->bounds().size();
   // Update the restore bounds to make it relative to the display.
   wm::WindowState* state = wm::GetWindowState(window);
   gfx::Rect restore_bounds;
   const bool has_restore_bounds = state->HasRestoreBounds();

   const bool update_bounds = state->IsNormalOrSnapped() || state->IsMinimized();
   gfx::Rect work_area_in_new_parent =
       ScreenUtil::GetDisplayWorkAreaBoundsInParent(new_parent);

   gfx::Rect local_bounds;
   if (update_bounds) {
     local_bounds = state->window()->GetBounds();
     MoveOriginRelativeToSize(src_size, dst_size, &local_bounds);
     local_bounds.AdjustToFit(work_area_in_new_parent);
   }

   if (has_restore_bounds) {
     restore_bounds = state->GetRestoreBoundsInParent();
     MoveOriginRelativeToSize(src_size, dst_size, &restore_bounds);
     restore_bounds.AdjustToFit(work_area_in_new_parent);
   }

   new_parent->AddChild(window);

   // Docked windows have bounds handled by the layout manager in AddChild().
   if (update_bounds)
     window->SetBounds(local_bounds);

   if (has_restore_bounds)
     state->SetRestoreBoundsInParent(restore_bounds);
 }

 // Reparents the appropriate set of windows from |src| to |dst|.
 void ReparentAllWindows(aura::Window* src, aura::Window* dst) {
   // Set of windows to move.
   const int kContainerIdsToMove[] = {
       kShellWindowId_DefaultContainer,
       kShellWindowId_PanelContainer,
       kShellWindowId_AlwaysOnTopContainer,
       kShellWindowId_SystemModalContainer,
       kShellWindowId_LockSystemModalContainer,
       kShellWindowId_UnparentedControlContainer,
       kShellWindowId_OverlayContainer,
   };
   const int kExtraContainerIdsToMoveInUnifiedMode[] = {
       kShellWindowId_LockScreenContainer,
       kShellWindowId_LockScreenWallpaperContainer,
   };
   std::vector<int> container_ids(
       kContainerIdsToMove,
       kContainerIdsToMove + arraysize(kContainerIdsToMove));
   // Check the display mode as this is also necessary when trasitioning between
   // mirror and unified mode.
   if (ShellPort::Get()->IsInUnifiedModeIgnoreMirroring()) {
     for (int id : kExtraContainerIdsToMoveInUnifiedMode)
       container_ids.push_back(id);
   }

   for (int id : container_ids) {
     aura::Window* src_container = src->GetChildById(id);
     aura::Window* dst_container = dst->GetChildById(id);
     while (!src_container->children().empty()) {
       // Restart iteration from the source container windows each time as they
       // may change as a result of moving other windows.
       const aura::Window::Windows& src_container_children =
           src_container->children();
       auto iter = src_container_children.begin();
       while (iter != src_container_children.end() &&
              SystemModalContainerLayoutManager::IsModalBackground(
                  WmWindow::Get(*iter))) {
         ++iter;
       }
       // If the entire window list is modal background windows then stop.
       if (iter == src_container_children.end())
         break;
       ReparentWindow(*iter, dst_container);
     }
   }
 }

 // Creates a new window for use as a container.
 // TODO(sky): This should create an aura::Window. http://crbug.com/671246.
 WmWindow* CreateContainer(int window_id, const char* name, WmWindow* parent) {
   aura::Window* window = new aura::Window(nullptr, ui::wm::WINDOW_TYPE_UNKNOWN);
   window->Init(ui::LAYER_NOT_DRAWN);
   if (Shell::GetAshConfig() != Config::CLASSIC) {
     aura::WindowPortMus::Get(window)->SetEventTargetingPolicy(
         ui::mojom::EventTargetingPolicy::DESCENDANTS_ONLY);
   }
   window->set_id(window_id);
   window->SetName(name);
   parent->aura_window()->AddChild(window);
   if (window_id != kShellWindowId_UnparentedControlContainer)
     window->Show();
   return WmWindow::Get(window);
 }

 // TODO(sky): This should take an aura::Window. http://crbug.com/671246.
 bool ShouldDestroyWindowInCloseChildWindows(WmWindow* window) {
   if (!WmWindow::GetAuraWindow(window)->owned_by_parent())
     return false;

   if (Shell::GetAshConfig() != Config::MASH)
     return true;

   aura::WindowMus* window_mus =
       aura::WindowMus::Get(WmWindow::GetAuraWindow(window));
   return Shell::window_tree_client()->WasCreatedByThisClient(window_mus) ||
          Shell::window_tree_client()->IsRoot(window_mus);
 }

 }  // namespace

 // static
 std::vector<RootWindowController*>*
     RootWindowController::root_window_controllers_ = nullptr;

 RootWindowController::~RootWindowController() {
   Shutdown();
   ash_host_.reset();
   mus_window_tree_host_.reset();
   // The CaptureClient needs to be around for as long as the RootWindow is
   // valid.
   capture_client_.reset();
   if (animating_wallpaper_widget_controller_.get())
     animating_wallpaper_widget_controller_->StopAnimating();
   root_window_controllers_->erase(std::find(root_window_controllers_->begin(),
                                             root_window_controllers_->end(),
                                             this));
 }

 void RootWindowController::CreateForPrimaryDisplay(AshWindowTreeHost* host) {
   RootWindowController* controller = new RootWindowController(host, nullptr);
   controller->Init(RootWindowType::PRIMARY);
 }

 void RootWindowController::CreateForSecondaryDisplay(AshWindowTreeHost* host) {
   RootWindowController* controller = new RootWindowController(host, nullptr);
   controller->Init(RootWindowType::SECONDARY);
 }

 // static
 RootWindowController* RootWindowController::ForWindow(
     const aura::Window* window) {
   DCHECK(window);
   CHECK(Shell::HasInstance());
   return GetRootWindowController(window->GetRootWindow());
 }

 // static
 RootWindowController* RootWindowController::ForTargetRootWindow() {
   CHECK(Shell::HasInstance());
   return GetRootWindowController(Shell::GetRootWindowForNewWindows());
 }

 void RootWindowController::ConfigureWidgetInitParamsForContainer(
     views::Widget* widget,
     int shell_container_id,
     views::Widget::InitParams* init_params) {
   init_params->parent = GetContainer(shell_container_id);
 }

 aura::WindowTreeHost* RootWindowController::GetHost() {
   return window_tree_host_;
 }

 const aura::WindowTreeHost* RootWindowController::GetHost() const {
   return window_tree_host_;
 }

 aura::Window* RootWindowController::GetRootWindow() {
   return GetHost()->window();
 }

 const aura::Window* RootWindowController::GetRootWindow() const {
   return GetHost()->window();
 }

 const WmWindow* RootWindowController::GetWindow() const {
   return WmWindow::Get(GetRootWindow());
 }

 wm::WorkspaceWindowState RootWindowController::GetWorkspaceWindowState() {
   return workspace_controller_ ? workspace_controller()->GetWindowState()
                                : wm::WORKSPACE_WINDOW_STATE_DEFAULT;
 }

 bool RootWindowController::HasShelf() {
   return wm_shelf_->shelf_widget() != nullptr;
 }

 WmShelf* RootWindowController::GetShelf() {
   return wm_shelf_.get();
 }

 void RootWindowController::CreateShelfView() {
   if (wm_shelf_->IsShelfInitialized())
     return;
   wm_shelf_->CreateShelfView();

   // TODO(jamescook): Pass |wm_shelf_| into the constructors for these layout
   // managers.
   if (panel_layout_manager_)
     panel_layout_manager_->SetShelf(wm_shelf_.get());

   // Notify shell observers that the shelf has been created.
   // TODO(jamescook): Move this into WmShelf::InitializeShelf(). This will
   // require changing AttachedPanelWidgetTargeter's access to WmShelf.
   Shell::Get()->NotifyShelfCreatedForRootWindow(WmWindow::Get(GetRootWindow()));

   wm_shelf_->shelf_widget()->PostCreateShelf();
 }

 ShelfLayoutManager* RootWindowController::GetShelfLayoutManager() {
   return wm_shelf_->shelf_layout_manager();
 }

 SystemModalContainerLayoutManager*
 RootWindowController::GetSystemModalLayoutManager(WmWindow* window) {
   WmWindow* modal_container = nullptr;
   if (window) {
     aura::Window* window_container =
         wm::GetContainerForWindow(window->aura_window());
     if (window_container &&
         window_container->id() >= kShellWindowId_LockScreenContainer) {
       modal_container = GetWmContainer(kShellWindowId_LockSystemModalContainer);
     } else {
       modal_container = GetWmContainer(kShellWindowId_SystemModalContainer);
     }
   } else {
     int modal_window_id =
         Shell::Get()->session_controller()->IsUserSessionBlocked()
             ? kShellWindowId_LockSystemModalContainer
             : kShellWindowId_SystemModalContainer;
     modal_container = GetWmContainer(modal_window_id);
   }
   return modal_container ? static_cast<SystemModalContainerLayoutManager*>(
                                modal_container->GetLayoutManager())
                          : nullptr;
 }

 StatusAreaWidget* RootWindowController::GetStatusAreaWidget() {
   ShelfWidget* shelf_widget = wm_shelf_->shelf_widget();
   return shelf_widget ? shelf_widget->status_area_widget() : nullptr;
 }

 SystemTray* RootWindowController::GetSystemTray() {
   // We assume in throughout the code that this will not return NULL. If code
   // triggers this for valid reasons, it should test status_area_widget first.
   CHECK(wm_shelf_->shelf_widget()->status_area_widget());
   return wm_shelf_->shelf_widget()->status_area_widget()->system_tray();
 }

 bool RootWindowController::CanWindowReceiveEvents(aura::Window* window) {
   if (GetRootWindow() != window->GetRootWindow())
     return false;

   // Always allow events to fall through to the virtual keyboard even if
   // displaying a system modal dialog.
   if (IsVirtualKeyboardWindow(window))
     return true;

   aura::Window* blocking_container = nullptr;

   int modal_container_id = 0;
   if (Shell::Get()->session_controller()->IsUserSessionBlocked()) {
     blocking_container =
         GetContainer(kShellWindowId_LockScreenContainersContainer);
     modal_container_id = kShellWindowId_LockSystemModalContainer;
   } else {
     modal_container_id = kShellWindowId_SystemModalContainer;
   }
   aura::Window* modal_container = GetContainer(modal_container_id);
   SystemModalContainerLayoutManager* modal_layout_manager = nullptr;
   modal_layout_manager = static_cast<SystemModalContainerLayoutManager*>(
       WmWindow::Get(modal_container)->GetLayoutManager());

   if (modal_layout_manager->has_window_dimmer())
     blocking_container = modal_container;
   else
     modal_container = nullptr;  // Don't check modal dialogs.

   // In normal session.
   if (!blocking_container)
     return true;

   if (!IsWindowAboveContainer(window, blocking_container))
     return false;

   // If the window is in the target modal container, only allow the top most
   // one.
   if (modal_container && modal_container->Contains(window))
     return modal_layout_manager->IsPartOfActiveModalWindow(
         WmWindow::Get(window));

   return true;
 }

 WmWindow* RootWindowController::FindEventTarget(
     const gfx::Point& location_in_screen) {
   gfx::Point location_in_root(location_in_screen);
   aura::Window* root_window = GetRootWindow();
   ::wm::ConvertPointFromScreen(root_window, &location_in_root);
   ui::MouseEvent test_event(ui::ET_MOUSE_MOVED, location_in_root,
                             location_in_root, ui::EventTimeForNow(),
                             ui::EF_NONE, ui::EF_NONE);
   ui::EventTarget* event_handler =
       root_window->GetHost()
           ->dispatcher()
           ->GetDefaultEventTargeter()
           ->FindTargetForEvent(root_window, &test_event);
   return WmWindow::Get(static_cast<aura::Window*>(event_handler));
 }

 gfx::Point RootWindowController::GetLastMouseLocationInRoot() {
   return window_tree_host_->dispatcher()->GetLastMouseLocationInRoot();
 }

 aura::Window* RootWindowController::GetContainer(int container_id) {
   return GetRootWindow()->GetChildById(container_id);
 }

 const aura::Window* RootWindowController::GetContainer(int container_id) const {
   return window_tree_host_->window()->GetChildById(container_id);
 }

 const WmWindow* RootWindowController::GetWmContainer(int container_id) const {
   const aura::Window* window = GetContainer(container_id);
   return WmWindow::Get(window);
 }

 void RootWindowController::SetWallpaperWidgetController(
     WallpaperWidgetController* controller) {
   wallpaper_widget_controller_.reset(controller);
 }

 void RootWindowController::SetAnimatingWallpaperWidgetController(
     AnimatingWallpaperWidgetController* controller) {
   if (animating_wallpaper_widget_controller_.get())
     animating_wallpaper_widget_controller_->StopAnimating();
   animating_wallpaper_widget_controller_.reset(controller);
 }

 void RootWindowController::OnInitialWallpaperAnimationStarted() {
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kAshAnimateFromBootSplashScreen) &&
       boot_splash_screen_.get()) {
     // Make the splash screen fade out so it doesn't obscure the wallpaper's
     // brightness/grayscale animation.
     boot_splash_screen_->StartHideAnimation(
         base::TimeDelta::FromMilliseconds(kBootSplashScreenHideDurationMs));
   }
 }

 void RootWindowController::OnWallpaperAnimationFinished(views::Widget* widget) {
   // Make sure the wallpaper is visible.
   system_wallpaper_->SetColor(SK_ColorBLACK);
   boot_splash_screen_.reset();
   Shell::Get()->wallpaper_delegate()->OnWallpaperAnimationFinished();
   // Only removes old component when wallpaper animation finished. If we
   // remove the old one before the new wallpaper is done fading in there will
   // be a white flash during the animation.
   if (animating_wallpaper_widget_controller()) {
     WallpaperWidgetController* controller =
         animating_wallpaper_widget_controller()->GetController(true);
     DCHECK_EQ(controller->widget(), widget);
     // Release the old controller and close its wallpaper widget.
     SetWallpaperWidgetController(controller);
   }
 }

 void RootWindowController::Shutdown() {
   Shell::Get()->RemoveShellObserver(this);

   touch_exploration_manager_.reset();

   ResetRootForNewWindowsIfNecessary();

   CloseChildWindows();
   aura::Window* root_window = GetRootWindow();
   GetRootWindowSettings(root_window)->controller = nullptr;
   // Forget with the display ID so that display lookup
   // ends up with invalid display.
   GetRootWindowSettings(root_window)->display_id = display::kInvalidDisplayId;
   if (ash_host_)
     ash_host_->PrepareForShutdown();

   system_wallpaper_.reset();
   aura::client::SetScreenPositionClient(root_window, nullptr);
 }

 void RootWindowController::CloseChildWindows() {
   // NOTE: this may be called multiple times.

   // Deactivate keyboard container before closing child windows and shutting
   // down associated layout managers.
   DeactivateKeyboard(keyboard::KeyboardController::GetInstance());

   // |panel_layout_manager_| needs to be shut down before windows are destroyed.
   if (panel_layout_manager_) {
     panel_layout_manager_->Shutdown();
     panel_layout_manager_ = nullptr;
   }

   WmShelf* shelf = GetShelf();
   shelf->ShutdownShelfWidget();

   workspace_controller_.reset();

   // Explicitly destroy top level windows. We do this because such windows may
   // query the RootWindow for state.
   aura::WindowTracker non_toplevel_windows;
   WmWindow* root = GetWindow();
   non_toplevel_windows.Add(root->aura_window());
   while (!non_toplevel_windows.windows().empty()) {
     aura::Window* non_toplevel_window = non_toplevel_windows.Pop();
     aura::WindowTracker toplevel_windows;
     for (aura::Window* child : non_toplevel_window->children()) {
       if (!ShouldDestroyWindowInCloseChildWindows(WmWindow::Get(child)))
         continue;
       if (child->delegate())
         toplevel_windows.Add(child);
       else
         non_toplevel_windows.Add(child);
     }
     while (!toplevel_windows.windows().empty())
       delete toplevel_windows.Pop();
   }
   // And then remove the containers.
   while (!root->GetChildren().empty()) {
     WmWindow* child = root->GetChildren()[0];
     if (ShouldDestroyWindowInCloseChildWindows(child))
       child->Destroy();
     else
       root->RemoveChild(child);
   }

   shelf->DestroyShelfWidget();

   // CloseChildWindows() may be called twice during the shutdown of ash
   // unittests. Avoid notifying WmShelf that the shelf has been destroyed twice.
   if (shelf->IsShelfInitialized())
     shelf->ShutdownShelf();

   aura::client::SetDragDropClient(GetRootWindow(), nullptr);
   aura::client::SetTooltipClient(GetRootWindow(), nullptr);
 }

 void RootWindowController::MoveWindowsTo(aura::Window* dst) {
   // Clear the workspace controller, so it doesn't incorrectly update the shelf.
   workspace_controller_.reset();
   ReparentAllWindows(GetRootWindow(), dst);
 }

 void RootWindowController::UpdateShelfVisibility() {
   wm_shelf_->UpdateVisibilityState();
 }

 void RootWindowController::InitTouchHuds() {
   if (Shell::GetAshConfig() == Config::MASH)
     return;

   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kAshTouchHud))
     set_touch_hud_debug(new TouchHudDebug(GetRootWindow()));
   if (Shell::Get()->is_touch_hud_projection_enabled())
     EnableTouchHudProjection();
 }

 aura::Window* RootWindowController::GetWindowForFullscreenMode() {
   return WmWindow::GetAuraWindow(
       wm::GetWindowForFullscreenMode(WmWindow::Get(GetRootWindow())));
 }

 void RootWindowController::ActivateKeyboard(
     keyboard::KeyboardController* keyboard_controller) {
   if (!keyboard::IsKeyboardEnabled() ||
       GetContainer(kShellWindowId_VirtualKeyboardContainer)) {
     return;
   }
   DCHECK(keyboard_controller);
   Shell::Get()->NotifyVirtualKeyboardActivated(true,
                                                WmWindow::Get(GetRootWindow()));
   aura::Window* parent = GetContainer(kShellWindowId_ImeWindowParentContainer);
   DCHECK(parent);
   aura::Window* keyboard_container = keyboard_controller->GetContainerWindow();
   keyboard_container->set_id(kShellWindowId_VirtualKeyboardContainer);
   parent->AddChild(keyboard_container);
 }

 void RootWindowController::DeactivateKeyboard(
     keyboard::KeyboardController* keyboard_controller) {
   if (!keyboard_controller ||
       !keyboard_controller->keyboard_container_initialized()) {
     return;
   }
   aura::Window* keyboard_container = keyboard_controller->GetContainerWindow();
   if (keyboard_container->GetRootWindow() == GetRootWindow()) {
     aura::Window* parent =
         GetContainer(kShellWindowId_ImeWindowParentContainer);
     DCHECK(parent);
     // Virtual keyboard may be deactivated while still showing, hide the
     // keyboard before removing it from view hierarchy.
     keyboard_controller->HideKeyboard(
         keyboard::KeyboardController::HIDE_REASON_AUTOMATIC);
     parent->RemoveChild(keyboard_container);
     Shell::Get()->NotifyVirtualKeyboardActivated(
         false, WmWindow::Get(GetRootWindow()));
   }
 }

 bool RootWindowController::IsVirtualKeyboardWindow(aura::Window* window) {
   aura::Window* parent = GetContainer(kShellWindowId_ImeWindowParentContainer);
   return parent ? parent->Contains(window) : false;
 }

 void RootWindowController::SetTouchAccessibilityAnchorPoint(
     const gfx::Point& anchor_point) {
   if (touch_exploration_manager_)
     touch_exploration_manager_->SetTouchAccessibilityAnchorPoint(anchor_point);
 }

 void RootWindowController::ShowContextMenu(const gfx::Point& location_in_screen,
                                            ui::MenuSourceType source_type) {
   ShellDelegate* delegate = Shell::Get()->shell_delegate();
   DCHECK(delegate);
   menu_model_.reset(delegate->CreateContextMenu(wm_shelf_.get(), nullptr));
   if (!menu_model_)
     return;

   menu_model_adapter_ = base::MakeUnique<views::MenuModelAdapter>(
       menu_model_.get(),
       base::Bind(&RootWindowController::OnMenuClosed, base::Unretained(this)));

   // The wallpaper controller may not be set yet if the user clicked on the
   // status area before the initial animation completion. See crbug.com/222218
   if (!wallpaper_widget_controller())
     return;

   menu_runner_ = base::MakeUnique<views::MenuRunner>(
       menu_model_adapter_->CreateMenu(), views::MenuRunner::CONTEXT_MENU);
   menu_runner_->RunMenuAt(wallpaper_widget_controller()->widget(), nullptr,
                           gfx::Rect(location_in_screen, gfx::Size()),
                           views::MENU_ANCHOR_TOPLEFT, source_type);
 }

 void RootWindowController::UpdateAfterLoginStatusChange(LoginStatus status) {
   StatusAreaWidget* status_area_widget =
       wm_shelf_->shelf_widget()->status_area_widget();
   if (status_area_widget)
     status_area_widget->UpdateAfterLoginStatusChange(status);
 }

 ////////////////////////////////////////////////////////////////////////////////
 // RootWindowController, private:

 RootWindowController::RootWindowController(
     AshWindowTreeHost* ash_host,
     aura::WindowTreeHost* window_tree_host)
     : ash_host_(ash_host),
       mus_window_tree_host_(window_tree_host),
       window_tree_host_(ash_host ? ash_host->AsWindowTreeHost()
                                  : window_tree_host),
       wm_shelf_(base::MakeUnique<WmShelf>()) {
   DCHECK((ash_host && !window_tree_host) || (!ash_host && window_tree_host));

   if (!root_window_controllers_)
     root_window_controllers_ = new std::vector<RootWindowController*>;
   root_window_controllers_->push_back(this);

   aura::Window* root_window = GetRootWindow();
   GetRootWindowSettings(root_window)->controller = this;

   stacking_controller_.reset(new StackingController);
   aura::client::SetWindowParentingClient(root_window,
                                          stacking_controller_.get());
   capture_client_.reset(new ::wm::ScopedCaptureClient(root_window));
 }

 void RootWindowController::Init(RootWindowType root_window_type) {
   aura::Window* root_window = GetRootWindow();
   ShellPort* shell_port = ShellPort::Get();
   Shell* shell = Shell::Get();
   shell->InitRootWindow(root_window);

   CreateContainers();
   ShellPort::Get()->OnCreatedRootWindowContainers(this);

   CreateSystemWallpaper(root_window_type);

   InitLayoutManagers();
   InitTouchHuds();

   if (shell_port->GetPrimaryRootWindowController()
           ->GetSystemModalLayoutManager(nullptr)
           ->has_window_dimmer()) {
     GetSystemModalLayoutManager(nullptr)->CreateModalBackground();
   }

   shell->AddShellObserver(this);

   root_window_layout_manager_->OnWindowResized();
   if (root_window_type == RootWindowType::PRIMARY) {
     if (Shell::GetAshConfig() != Config::MASH)
       shell->InitKeyboard();
   } else {
     window_tree_host_->Show();

     // Create a shelf if a user is already logged in.
     if (shell->session_controller()->NumberOfLoggedInUsers())
       CreateShelfView();

     // Notify shell observers about new root window.
     shell->OnRootWindowAdded(WmWindow::Get(root_window));
   }

   // TODO: AshTouchExplorationManager doesn't work with mus.
   // http://crbug.com/679782
   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kAshDisableTouchExplorationMode) &&
       Shell::GetAshConfig() != Config::MASH) {
     touch_exploration_manager_.reset(new AshTouchExplorationManager(this));
   }
 }

 void RootWindowController::InitLayoutManagers() {
   // Create the shelf and status area widgets.
   DCHECK(!wm_shelf_->shelf_widget());
   GetShelf()->CreateShelfWidget(GetWindow());

   WmWindow* root = GetWindow();
   root_window_layout_manager_ = new wm::RootWindowLayoutManager(root);
   root->SetLayoutManager(base::WrapUnique(root_window_layout_manager_));

   WmWindow* default_container = GetWmContainer(kShellWindowId_DefaultContainer);
   // Installs WorkspaceLayoutManager on |default_container|.
   workspace_controller_.reset(new WorkspaceController(default_container));

   WmWindow* modal_container =
       GetWmContainer(kShellWindowId_SystemModalContainer);
   DCHECK(modal_container);
   modal_container->SetLayoutManager(
       base::MakeUnique<SystemModalContainerLayoutManager>(modal_container));

   WmWindow* lock_modal_container =
       GetWmContainer(kShellWindowId_LockSystemModalContainer);
   DCHECK(lock_modal_container);
   lock_modal_container->SetLayoutManager(
       base::MakeUnique<SystemModalContainerLayoutManager>(
           lock_modal_container));

   WmWindow* lock_container = GetWmContainer(kShellWindowId_LockScreenContainer);
   DCHECK(lock_container);
   lock_container->SetLayoutManager(
       base::MakeUnique<LockLayoutManager>(lock_container));

   WmWindow* always_on_top_container =
       GetWmContainer(kShellWindowId_AlwaysOnTopContainer);
   DCHECK(always_on_top_container);
   always_on_top_controller_ =
       base::MakeUnique<AlwaysOnTopController>(always_on_top_container);

   // Create Panel layout manager
   WmWindow* wm_panel_container = GetWmContainer(kShellWindowId_PanelContainer);
   panel_layout_manager_ = new PanelLayoutManager(wm_panel_container);
   wm_panel_container->aura_window()->SetLayoutManager(panel_layout_manager_);

   wm::WmSnapToPixelLayoutManager::InstallOnContainers(root);

   // Make it easier to resize windows that partially overlap the shelf. Must
   // occur after the ShelfLayoutManager is constructed by ShelfWidget.
   aura::Window* shelf_container = GetContainer(kShellWindowId_ShelfContainer);
   WmWindow* wm_shelf_container = WmWindow::Get(shelf_container);
   shelf_container->SetEventTargeter(base::MakeUnique<ShelfWindowTargeter>(
       wm_shelf_container, wm_shelf_.get()));
   aura::Window* status_container = GetContainer(kShellWindowId_StatusContainer);
   WmWindow* wm_status_container = WmWindow::Get(status_container);
   status_container->SetEventTargeter(base::MakeUnique<ShelfWindowTargeter>(
       wm_status_container, wm_shelf_.get()));

   panel_container_handler_ = base::MakeUnique<PanelWindowEventHandler>();
   GetContainer(kShellWindowId_PanelContainer)
       ->AddPreTargetHandler(panel_container_handler_.get());

   // Install an AttachedPanelWindowTargeter on the panel container to make it
   // easier to correctly target shelf buttons with touch.
   gfx::Insets mouse_extend(-kResizeOutsideBoundsSize, -kResizeOutsideBoundsSize,
                            -kResizeOutsideBoundsSize,
                            -kResizeOutsideBoundsSize);
   gfx::Insets touch_extend =
       mouse_extend.Scale(kResizeOutsideBoundsScaleForTouch);
   aura::Window* panel_container = GetContainer(kShellWindowId_PanelContainer);
   panel_container->SetEventTargeter(std::unique_ptr<ui::EventTargeter>(
       new AttachedPanelWindowTargeter(panel_container, mouse_extend,
                                       touch_extend, panel_layout_manager())));
 }

 void RootWindowController::CreateContainers() {
   WmWindow* root = GetWindow();
   // For screen rotation animation: add a NOT_DRAWN layer in between the
   // root_window's layer and its current children so that we only need to
   // initiate two LayerAnimationSequences. One for the new layers and one for
   // the old layers.
   WmWindow* screen_rotation_container = CreateContainer(
       kShellWindowId_ScreenRotationContainer, "ScreenRotationContainer", root);

   // These containers are just used by PowerButtonController to animate groups
   // of containers simultaneously without messing up the current transformations
   // on those containers. These are direct children of the
   // screen_rotation_container window; all of the other containers are their
   // children.

   // The wallpaper container is not part of the lock animation, so it is not
   // included in those animate groups. When the screen is locked, the wallpaper
   // is moved to the lock screen wallpaper container (and moved back on unlock).
   // Ensure that there's an opaque layer occluding the non-lock-screen layers.
   WmWindow* wallpaper_container =
       CreateContainer(kShellWindowId_WallpaperContainer, "WallpaperContainer",
                       screen_rotation_container);
   wallpaper_container->SetChildWindowVisibilityChangesAnimated();

   WmWindow* non_lock_screen_containers = CreateContainer(
       kShellWindowId_NonLockScreenContainersContainer,
       "NonLockScreenContainersContainer", screen_rotation_container);
   // Clip all windows inside this container, as half pixel of the window's
   // texture may become visible when the screen is scaled. crbug.com/368591.
   non_lock_screen_containers->SetMasksToBounds(true);

   WmWindow* lock_wallpaper_containers = CreateContainer(
       kShellWindowId_LockScreenWallpaperContainer,
       "LockScreenWallpaperContainer", screen_rotation_container);
   lock_wallpaper_containers->SetChildWindowVisibilityChangesAnimated();

   WmWindow* lock_screen_containers = CreateContainer(
       kShellWindowId_LockScreenContainersContainer,
       "LockScreenContainersContainer", screen_rotation_container);
   WmWindow* lock_screen_related_containers = CreateContainer(
       kShellWindowId_LockScreenRelatedContainersContainer,
       "LockScreenRelatedContainersContainer", screen_rotation_container);

   CreateContainer(kShellWindowId_UnparentedControlContainer,
                   "UnparentedControlContainer", non_lock_screen_containers);

   WmWindow* default_container =
       CreateContainer(kShellWindowId_DefaultContainer, "DefaultContainer",
                       non_lock_screen_containers);
   default_container->SetChildWindowVisibilityChangesAnimated();
   default_container->SetSnapsChildrenToPhysicalPixelBoundary();
   default_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);
   default_container->SetChildrenUseExtendedHitRegion();

   WmWindow* always_on_top_container =
       CreateContainer(kShellWindowId_AlwaysOnTopContainer,
                       "AlwaysOnTopContainer", non_lock_screen_containers);
   always_on_top_container->SetChildWindowVisibilityChangesAnimated();
   always_on_top_container->SetSnapsChildrenToPhysicalPixelBoundary();
   always_on_top_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);

   WmWindow* shelf_container =
       CreateContainer(kShellWindowId_ShelfContainer, "ShelfContainer",
                       non_lock_screen_containers);
   shelf_container->SetSnapsChildrenToPhysicalPixelBoundary();
   shelf_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);
   shelf_container->SetLockedToRoot(true);

   WmWindow* panel_container =
       CreateContainer(kShellWindowId_PanelContainer, "PanelContainer",
                       non_lock_screen_containers);
   panel_container->SetSnapsChildrenToPhysicalPixelBoundary();
   panel_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);

   WmWindow* shelf_bubble_container =
       CreateContainer(kShellWindowId_ShelfBubbleContainer,
                       "ShelfBubbleContainer", non_lock_screen_containers);
   shelf_bubble_container->SetSnapsChildrenToPhysicalPixelBoundary();
   shelf_bubble_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);
   shelf_bubble_container->SetLockedToRoot(true);

   WmWindow* app_list_container =
       CreateContainer(kShellWindowId_AppListContainer, "AppListContainer",
                       non_lock_screen_containers);
   app_list_container->SetSnapsChildrenToPhysicalPixelBoundary();
   app_list_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);

   WmWindow* modal_container =
       CreateContainer(kShellWindowId_SystemModalContainer,
                       "SystemModalContainer", non_lock_screen_containers);
   modal_container->SetSnapsChildrenToPhysicalPixelBoundary();
   modal_container->SetChildWindowVisibilityChangesAnimated();
   modal_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);
   modal_container->SetChildrenUseExtendedHitRegion();

   // TODO(beng): Figure out if we can make this use
   // SystemModalContainerEventFilter instead of stops_event_propagation.
   WmWindow* lock_container =
       CreateContainer(kShellWindowId_LockScreenContainer, "LockScreenContainer",
                       lock_screen_containers);
   lock_container->SetSnapsChildrenToPhysicalPixelBoundary();
   lock_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);
   // TODO(beng): stopsevents

   WmWindow* lock_modal_container =
       CreateContainer(kShellWindowId_LockSystemModalContainer,
                       "LockSystemModalContainer", lock_screen_containers);
   lock_modal_container->SetSnapsChildrenToPhysicalPixelBoundary();
   lock_modal_container->SetChildWindowVisibilityChangesAnimated();
   lock_modal_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);
   lock_modal_container->SetChildrenUseExtendedHitRegion();

   WmWindow* status_container =
       CreateContainer(kShellWindowId_StatusContainer, "StatusContainer",
                       lock_screen_related_containers);
   status_container->SetSnapsChildrenToPhysicalPixelBoundary();
   status_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);
   status_container->SetLockedToRoot(true);

   WmWindow* settings_bubble_container =
       CreateContainer(kShellWindowId_SettingBubbleContainer,
                       "SettingBubbleContainer", lock_screen_related_containers);
   settings_bubble_container->SetChildWindowVisibilityChangesAnimated();
   settings_bubble_container->SetSnapsChildrenToPhysicalPixelBoundary();
   settings_bubble_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);
   settings_bubble_container->SetLockedToRoot(true);

   WmWindow* virtual_keyboard_parent_container = CreateContainer(
       kShellWindowId_ImeWindowParentContainer, "VirtualKeyboardParentContainer",
       lock_screen_related_containers);
   virtual_keyboard_parent_container->SetSnapsChildrenToPhysicalPixelBoundary();
   virtual_keyboard_parent_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);

   WmWindow* menu_container =
       CreateContainer(kShellWindowId_MenuContainer, "MenuContainer",
                       lock_screen_related_containers);
   menu_container->SetChildWindowVisibilityChangesAnimated();
   menu_container->SetSnapsChildrenToPhysicalPixelBoundary();
   menu_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);

   WmWindow* drag_drop_container = CreateContainer(
       kShellWindowId_DragImageAndTooltipContainer,
       "DragImageAndTooltipContainer", lock_screen_related_containers);
   drag_drop_container->SetChildWindowVisibilityChangesAnimated();
   drag_drop_container->SetSnapsChildrenToPhysicalPixelBoundary();
   drag_drop_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);

   WmWindow* overlay_container =
       CreateContainer(kShellWindowId_OverlayContainer, "OverlayContainer",
                       lock_screen_related_containers);
   overlay_container->SetSnapsChildrenToPhysicalPixelBoundary();
   overlay_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);

   WmWindow* mouse_cursor_container =
       CreateContainer(kShellWindowId_MouseCursorContainer,
                       "MouseCursorContainer", screen_rotation_container);
   mouse_cursor_container->SetBoundsInScreenBehaviorForChildren(
       WmWindow::BoundsInScreenBehavior::USE_SCREEN_COORDINATES);

   CreateContainer(kShellWindowId_PowerButtonAnimationContainer,
                   "PowerButtonAnimationContainer", screen_rotation_container);
 }

 void RootWindowController::CreateSystemWallpaper(
     RootWindowType root_window_type) {
   SkColor color = SK_ColorBLACK;
   // The splash screen appears on the primary display at boot. If this is a
   // secondary monitor (either connected at boot or connected later) or if the
   // browser restarted for a second login then don't use the boot color.
   const bool is_boot_splash_screen =
       root_window_type == RootWindowType::PRIMARY &&
       base::CommandLine::ForCurrentProcess()->HasSwitch(
           chromeos::switches::kFirstExecAfterBoot);
   if (is_boot_splash_screen)
     color = kChromeOsBootColor;
   system_wallpaper_.reset(
       new SystemWallpaperController(GetRootWindow(), color));

   // Make a copy of the system's boot splash screen so we can composite it
   // onscreen until the wallpaper is ready.
   if (is_boot_splash_screen &&
       (base::CommandLine::ForCurrentProcess()->HasSwitch(
            switches::kAshCopyHostBackgroundAtBoot) ||
        base::CommandLine::ForCurrentProcess()->HasSwitch(
            switches::kAshAnimateFromBootSplashScreen)))
     boot_splash_screen_.reset(new BootSplashScreen(GetHost()));
 }

 void RootWindowController::EnableTouchHudProjection() {
   if (touch_hud_projection_)
     return;
   set_touch_hud_projection(new TouchHudProjection(GetRootWindow()));
 }

 void RootWindowController::DisableTouchHudProjection() {
   if (!touch_hud_projection_)
     return;
   touch_hud_projection_->Remove();
 }

 void RootWindowController::ResetRootForNewWindowsIfNecessary() {
   // Change the target root window before closing child windows. If any child
   // being removed triggers a relayout of the shelf it will try to build a
   // window list adding windows from the target root window's containers which
   // may have already gone away.
   WmWindow* root = GetWindow();
   if (Shell::GetWmRootWindowForNewWindows() == root) {
     // The root window for new windows is being destroyed. Switch to the primary
     // root window if possible.
     WmWindow* primary_root = ShellPort::Get()->GetPrimaryRootWindow();
     Shell::Get()->set_root_window_for_new_windows(
         primary_root == root ? nullptr : primary_root);
   }
 }

 void RootWindowController::OnMenuClosed() {
   menu_runner_.reset();
   menu_model_adapter_.reset();
   menu_model_.reset();
   wm_shelf_->UpdateVisibilityState();
 }

 void RootWindowController::OnTouchHudProjectionToggled(bool enabled) {
   if (enabled)
     EnableTouchHudProjection();
   else
     DisableTouchHudProjection();
 }

 RootWindowController* GetRootWindowController(const aura::Window* root_window) {
   return root_window ? GetRootWindowSettings(root_window)->controller : nullptr;
 }

 }  // namespace ash