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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/virtual_keyboard_container_layout_manager.h"
48 #include "ash/wm/window_properties.h"
49 #include "ash/wm/window_state.h"
50 #include "ash/wm/window_util.h"
51 #include "ash/wm/workspace/workspace_layout_manager.h"
52 #include "ash/wm/workspace_controller.h"
53 #include "base/command_line.h"
54 #include "base/time/time.h"
55 #include "ui/aura/client/aura_constants.h"
56 #include "ui/aura/client/screen_position_client.h"
57 #include "ui/aura/window.h"
58 #include "ui/aura/window_delegate.h"
59 #include "ui/aura/window_event_dispatcher.h"
60 #include "ui/aura/window_observer.h"
61 #include "ui/aura/window_tracker.h"
62 #include "ui/base/hit_test.h"
63 #include "ui/base/models/menu_model.h"
64 #include "ui/gfx/display.h"
65 #include "ui/gfx/screen.h"
66 #include "ui/keyboard/keyboard_controller.h"
67 #include "ui/keyboard/keyboard_util.h"
68 #include "ui/views/controls/menu/menu_runner.h"
69 #include "ui/views/view_model.h"
70 #include "ui/views/view_model_utils.h"
71 #include "ui/wm/core/capture_controller.h"
72 #include "ui/wm/core/easy_resize_window_targeter.h"
73 #include "ui/wm/core/visibility_controller.h"
74 #include "ui/wm/core/window_util.h"
75 #include "ui/wm/public/drag_drop_client.h"
76 #include "ui/wm/public/tooltip_client.h"
77 #include "ui/wm/public/window_types.h"
78 
79 #if defined(OS_CHROMEOS)
80 #include "ash/ash_touch_exploration_manager_chromeos.h"
81 #include "ash/wm/boot_splash_screen_chromeos.h"
82 #include "ui/chromeos/touch_exploration_controller.h"
83 #endif
84 
85 namespace ash {
86 namespace {
87 
88 #if defined(OS_CHROMEOS)
89 // Duration for the animation that hides the boot splash screen, in
90 // milliseconds.  This should be short enough in relation to
91 // wm/window_animation.cc's brightness/grayscale fade animation that the login
92 // background image animation isn't hidden by the splash screen animation.
93 const int kBootSplashScreenHideDurationMs = 500;
94 #endif
95 
96 // Creates a new window for use as a container.
CreateContainer(int window_id,const char * name,aura::Window * parent)97 aura::Window* CreateContainer(int window_id,
98                               const char* name,
99                               aura::Window* parent) {
100   aura::Window* container = new aura::Window(NULL);
101   container->set_id(window_id);
102   container->SetName(name);
103   container->Init(aura::WINDOW_LAYER_NOT_DRAWN);
104   parent->AddChild(container);
105   if (window_id != kShellWindowId_UnparentedControlContainer)
106     container->Show();
107   return container;
108 }
109 
ToRelativeValue(int value,int src,int dst)110 float ToRelativeValue(int value, int src, int dst) {
111   return static_cast<float>(value) / static_cast<float>(src) * dst;
112 }
113 
MoveOriginRelativeToSize(const gfx::Size & src_size,const gfx::Size & dst_size,gfx::Rect * bounds_in_out)114 void MoveOriginRelativeToSize(const gfx::Size& src_size,
115                                 const gfx::Size& dst_size,
116                                 gfx::Rect* bounds_in_out) {
117   gfx::Point origin = bounds_in_out->origin();
118   bounds_in_out->set_origin(gfx::Point(
119       ToRelativeValue(origin.x(), src_size.width(), dst_size.width()),
120       ToRelativeValue(origin.y(), src_size.height(), dst_size.height())));
121 }
122 
123 // Reparents |window| to |new_parent|.
ReparentWindow(aura::Window * window,aura::Window * new_parent)124 void ReparentWindow(aura::Window* window, aura::Window* new_parent) {
125   const gfx::Size src_size = window->parent()->bounds().size();
126   const gfx::Size dst_size = new_parent->bounds().size();
127   // Update the restore bounds to make it relative to the display.
128   wm::WindowState* state = wm::GetWindowState(window);
129   gfx::Rect restore_bounds;
130   bool has_restore_bounds = state->HasRestoreBounds();
131 
132   bool update_bounds = (state->IsNormalOrSnapped() || state->IsMinimized()) &&
133                        new_parent->id() != kShellWindowId_DockedContainer;
134   gfx::Rect local_bounds;
135   if (update_bounds) {
136     local_bounds = state->window()->bounds();
137     MoveOriginRelativeToSize(src_size, dst_size, &local_bounds);
138   }
139 
140   if (has_restore_bounds) {
141     restore_bounds = state->GetRestoreBoundsInParent();
142     MoveOriginRelativeToSize(src_size, dst_size, &restore_bounds);
143   }
144 
145   new_parent->AddChild(window);
146 
147   // Docked windows have bounds handled by the layout manager in AddChild().
148   if (update_bounds)
149     window->SetBounds(local_bounds);
150 
151   if (has_restore_bounds)
152     state->SetRestoreBoundsInParent(restore_bounds);
153 }
154 
155 // Reparents the appropriate set of windows from |src| to |dst|.
ReparentAllWindows(aura::Window * src,aura::Window * dst)156 void ReparentAllWindows(aura::Window* src, aura::Window* dst) {
157   // Set of windows to move.
158   const int kContainerIdsToMove[] = {
159       kShellWindowId_DefaultContainer,
160       kShellWindowId_DockedContainer,
161       kShellWindowId_PanelContainer,
162       kShellWindowId_AlwaysOnTopContainer,
163       kShellWindowId_SystemModalContainer,
164       kShellWindowId_LockSystemModalContainer,
165       kShellWindowId_UnparentedControlContainer, };
166   for (size_t i = 0; i < arraysize(kContainerIdsToMove); i++) {
167     int id = kContainerIdsToMove[i];
168     aura::Window* src_container = Shell::GetContainer(src, id);
169     aura::Window* dst_container = Shell::GetContainer(dst, id);
170     while (!src_container->children().empty()) {
171       // Restart iteration from the source container windows each time as they
172       // may change as a result of moving other windows.
173       aura::Window::Windows::const_iterator iter =
174           src_container->children().begin();
175       while (iter != src_container->children().end() &&
176              SystemModalContainerLayoutManager::IsModalBackground(*iter)) {
177         ++iter;
178       }
179       // If the entire window list is modal background windows then stop.
180       if (iter == src_container->children().end())
181         break;
182       ReparentWindow(*iter, dst_container);
183     }
184   }
185 }
186 
187 // Mark the container window so that a widget added to this container will
188 // use the virtual screeen coordinates instead of parent.
SetUsesScreenCoordinates(aura::Window * container)189 void SetUsesScreenCoordinates(aura::Window* container) {
190   container->SetProperty(kUsesScreenCoordinatesKey, true);
191 }
192 
193 // Mark the container window so that a widget added to this container will
194 // say in the same root window regardless of the bounds specified.
DescendantShouldStayInSameRootWindow(aura::Window * container)195 void DescendantShouldStayInSameRootWindow(aura::Window* container) {
196   container->SetProperty(kStayInSameRootWindowKey, true);
197 }
198 
SetUsesEasyResizeTargeter(aura::Window * container)199 void SetUsesEasyResizeTargeter(aura::Window* container) {
200   gfx::Insets mouse_extend(-kResizeOutsideBoundsSize,
201                            -kResizeOutsideBoundsSize,
202                            -kResizeOutsideBoundsSize,
203                            -kResizeOutsideBoundsSize);
204   gfx::Insets touch_extend = mouse_extend.Scale(
205       kResizeOutsideBoundsScaleForTouch);
206   container->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
207       new ::wm::EasyResizeWindowTargeter(container, mouse_extend,
208                                          touch_extend)));
209 }
210 
211 // A window delegate which does nothing. Used to create a window that
212 // is a event target, but do nothing.
213 class EmptyWindowDelegate : public aura::WindowDelegate {
214  public:
EmptyWindowDelegate()215   EmptyWindowDelegate() {}
~EmptyWindowDelegate()216   virtual ~EmptyWindowDelegate() {}
217 
218   // aura::WindowDelegate overrides:
GetMinimumSize() const219   virtual gfx::Size GetMinimumSize() const OVERRIDE {
220     return gfx::Size();
221   }
GetMaximumSize() const222   virtual gfx::Size GetMaximumSize() const OVERRIDE {
223     return gfx::Size();
224   }
OnBoundsChanged(const gfx::Rect & old_bounds,const gfx::Rect & new_bounds)225   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
226                                const gfx::Rect& new_bounds) OVERRIDE {
227   }
GetCursor(const gfx::Point & point)228   virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE {
229     return gfx::kNullCursor;
230   }
GetNonClientComponent(const gfx::Point & point) const231   virtual int GetNonClientComponent(
232       const gfx::Point& point) const OVERRIDE {
233     return HTNOWHERE;
234   }
ShouldDescendIntoChildForEventHandling(aura::Window * child,const gfx::Point & location)235   virtual bool ShouldDescendIntoChildForEventHandling(
236       aura::Window* child,
237       const gfx::Point& location) OVERRIDE {
238     return false;
239   }
CanFocus()240   virtual bool CanFocus() OVERRIDE {
241     return false;
242   }
OnCaptureLost()243   virtual void OnCaptureLost() OVERRIDE {
244   }
OnPaint(gfx::Canvas * canvas)245   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
246   }
OnDeviceScaleFactorChanged(float device_scale_factor)247   virtual void OnDeviceScaleFactorChanged(
248       float device_scale_factor) OVERRIDE {
249   }
OnWindowDestroying(aura::Window * window)250   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {}
OnWindowDestroyed(aura::Window * window)251   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE {
252     delete this;
253   }
OnWindowTargetVisibilityChanged(bool visible)254   virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {
255   }
HasHitTestMask() const256   virtual bool HasHitTestMask() const OVERRIDE {
257     return false;
258   }
GetHitTestMask(gfx::Path * mask) const259   virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE {}
260 
261  private:
262   DISALLOW_COPY_AND_ASSIGN(EmptyWindowDelegate);
263 };
264 
265 }  // namespace
266 
CreateForPrimaryDisplay(AshWindowTreeHost * host)267 void RootWindowController::CreateForPrimaryDisplay(AshWindowTreeHost* host) {
268   RootWindowController* controller = new RootWindowController(host);
269   controller->Init(RootWindowController::PRIMARY,
270                    Shell::GetInstance()->delegate()->IsFirstRunAfterBoot());
271 }
272 
CreateForSecondaryDisplay(AshWindowTreeHost * host)273 void RootWindowController::CreateForSecondaryDisplay(AshWindowTreeHost* host) {
274   RootWindowController* controller = new RootWindowController(host);
275   controller->Init(RootWindowController::SECONDARY, false /* first run */);
276 }
277 
278 // static
ForShelf(const aura::Window * window)279 RootWindowController* RootWindowController::ForShelf(
280     const aura::Window* window) {
281   CHECK(Shell::HasInstance());
282   return GetRootWindowController(window->GetRootWindow());
283 }
284 
285 // static
ForWindow(const aura::Window * window)286 RootWindowController* RootWindowController::ForWindow(
287     const aura::Window* window) {
288   CHECK(Shell::HasInstance());
289   return GetRootWindowController(window->GetRootWindow());
290 }
291 
292 // static
ForTargetRootWindow()293 RootWindowController* RootWindowController::ForTargetRootWindow() {
294   CHECK(Shell::HasInstance());
295   return GetRootWindowController(Shell::GetTargetRootWindow());
296 }
297 
298 // static
GetContainerForWindow(aura::Window * window)299 aura::Window* RootWindowController::GetContainerForWindow(
300     aura::Window* window) {
301   aura::Window* container = window->parent();
302   while (container && container->type() != ui::wm::WINDOW_TYPE_UNKNOWN)
303     container = container->parent();
304   return container;
305 }
306 
~RootWindowController()307 RootWindowController::~RootWindowController() {
308   Shutdown();
309   ash_host_.reset();
310   // The CaptureClient needs to be around for as long as the RootWindow is
311   // valid.
312   capture_client_.reset();
313 }
314 
GetHost()315 aura::WindowTreeHost* RootWindowController::GetHost() {
316   return ash_host_->AsWindowTreeHost();
317 }
318 
GetHost() const319 const aura::WindowTreeHost* RootWindowController::GetHost() const {
320   return ash_host_->AsWindowTreeHost();
321 }
322 
GetRootWindow()323 aura::Window* RootWindowController::GetRootWindow() {
324   return GetHost()->window();
325 }
326 
GetRootWindow() const327 const aura::Window* RootWindowController::GetRootWindow() const {
328   return GetHost()->window();
329 }
330 
SetWallpaperController(DesktopBackgroundWidgetController * controller)331 void RootWindowController::SetWallpaperController(
332     DesktopBackgroundWidgetController* controller) {
333   wallpaper_controller_.reset(controller);
334 }
335 
SetAnimatingWallpaperController(AnimatingDesktopController * controller)336 void RootWindowController::SetAnimatingWallpaperController(
337     AnimatingDesktopController* controller) {
338   if (animating_wallpaper_controller_.get())
339     animating_wallpaper_controller_->StopAnimating();
340   animating_wallpaper_controller_.reset(controller);
341 }
342 
Shutdown()343 void RootWindowController::Shutdown() {
344   Shell* shell = Shell::GetInstance();
345   shell->RemoveShellObserver(this);
346 
347 #if defined(OS_CHROMEOS)
348   if (touch_exploration_manager_) {
349     touch_exploration_manager_.reset();
350   }
351 #endif
352 
353   if (animating_wallpaper_controller_.get())
354     animating_wallpaper_controller_->StopAnimating();
355   wallpaper_controller_.reset();
356   animating_wallpaper_controller_.reset();
357   aura::Window* root_window = GetRootWindow();
358   // Change the target root window before closing child windows. If any child
359   // being removed triggers a relayout of the shelf it will try to build a
360   // window list adding windows from the target root window's containers which
361   // may have already gone away.
362   if (Shell::GetTargetRootWindow() == root_window) {
363     shell->set_target_root_window(
364         Shell::GetPrimaryRootWindow() == root_window
365             ? NULL
366             : Shell::GetPrimaryRootWindow());
367   }
368 
369   CloseChildWindows();
370   GetRootWindowSettings(root_window)->controller = NULL;
371   screen_dimmer_.reset();
372   workspace_controller_.reset();
373   // Forget with the display ID so that display lookup
374   // ends up with invalid display.
375   GetRootWindowSettings(root_window)->display_id =
376       gfx::Display::kInvalidDisplayID;
377   ash_host_->PrepareForShutdown();
378 
379   system_background_.reset();
380   aura::client::SetScreenPositionClient(root_window, NULL);
381 }
382 
383 SystemModalContainerLayoutManager*
GetSystemModalLayoutManager(aura::Window * window)384 RootWindowController::GetSystemModalLayoutManager(aura::Window* window) {
385   aura::Window* modal_container = NULL;
386   if (window) {
387     aura::Window* window_container = GetContainerForWindow(window);
388     if (window_container &&
389         window_container->id() >= kShellWindowId_LockScreenContainer) {
390       modal_container = GetContainer(kShellWindowId_LockSystemModalContainer);
391     } else {
392       modal_container = GetContainer(kShellWindowId_SystemModalContainer);
393     }
394   } else {
395     int modal_window_id = Shell::GetInstance()->session_state_delegate()
396         ->IsUserSessionBlocked() ? kShellWindowId_LockSystemModalContainer :
397                                    kShellWindowId_SystemModalContainer;
398     modal_container = GetContainer(modal_window_id);
399   }
400   return modal_container ? static_cast<SystemModalContainerLayoutManager*>(
401       modal_container->layout_manager()) : NULL;
402 }
403 
GetContainer(int container_id)404 aura::Window* RootWindowController::GetContainer(int container_id) {
405   return GetRootWindow()->GetChildById(container_id);
406 }
407 
GetContainer(int container_id) const408 const aura::Window* RootWindowController::GetContainer(int container_id) const {
409   return ash_host_->AsWindowTreeHost()->window()->GetChildById(container_id);
410 }
411 
ShowShelf()412 void RootWindowController::ShowShelf() {
413   if (!shelf_->shelf())
414     return;
415   shelf_->shelf()->SetVisible(true);
416   shelf_->status_area_widget()->Show();
417 }
418 
OnShelfCreated()419 void RootWindowController::OnShelfCreated() {
420   if (panel_layout_manager_)
421     panel_layout_manager_->SetShelf(shelf_->shelf());
422   if (docked_layout_manager_) {
423     docked_layout_manager_->SetShelf(shelf_->shelf());
424     if (shelf_->shelf_layout_manager())
425       docked_layout_manager_->AddObserver(shelf_->shelf_layout_manager());
426   }
427 
428   // Notify shell observers that the shelf has been created.
429   Shell::GetInstance()->OnShelfCreatedForRootWindow(GetRootWindow());
430 }
431 
UpdateAfterLoginStatusChange(user::LoginStatus status)432 void RootWindowController::UpdateAfterLoginStatusChange(
433     user::LoginStatus status) {
434   if (status != user::LOGGED_IN_NONE)
435     mouse_event_target_.reset();
436   if (shelf_->status_area_widget())
437     shelf_->status_area_widget()->UpdateAfterLoginStatusChange(status);
438 }
439 
HandleInitialDesktopBackgroundAnimationStarted()440 void RootWindowController::HandleInitialDesktopBackgroundAnimationStarted() {
441 #if defined(OS_CHROMEOS)
442   if (CommandLine::ForCurrentProcess()->HasSwitch(
443           switches::kAshAnimateFromBootSplashScreen) &&
444       boot_splash_screen_.get()) {
445     // Make the splash screen fade out so it doesn't obscure the desktop
446     // wallpaper's brightness/grayscale animation.
447     boot_splash_screen_->StartHideAnimation(
448         base::TimeDelta::FromMilliseconds(kBootSplashScreenHideDurationMs));
449   }
450 #endif
451 }
452 
OnWallpaperAnimationFinished(views::Widget * widget)453 void RootWindowController::OnWallpaperAnimationFinished(views::Widget* widget) {
454   // Make sure the wallpaper is visible.
455   system_background_->SetColor(SK_ColorBLACK);
456 #if defined(OS_CHROMEOS)
457   boot_splash_screen_.reset();
458 #endif
459 
460   Shell::GetInstance()->user_wallpaper_delegate()->
461       OnWallpaperAnimationFinished();
462   // Only removes old component when wallpaper animation finished. If we
463   // remove the old one before the new wallpaper is done fading in there will
464   // be a white flash during the animation.
465   if (animating_wallpaper_controller()) {
466     DesktopBackgroundWidgetController* controller =
467         animating_wallpaper_controller()->GetController(true);
468     // |desktop_widget_| should be the same animating widget we try to move
469     // to |kDesktopController|. Otherwise, we may close |desktop_widget_|
470     // before move it to |kDesktopController|.
471     DCHECK_EQ(controller->widget(), widget);
472     // Release the old controller and close its background widget.
473     SetWallpaperController(controller);
474   }
475 }
476 
CloseChildWindows()477 void RootWindowController::CloseChildWindows() {
478   mouse_event_target_.reset();
479 
480   // Remove observer as deactivating keyboard causes |docked_layout_manager_|
481   // to fire notifications.
482   if (docked_layout_manager_ && shelf_ && shelf_->shelf_layout_manager())
483     docked_layout_manager_->RemoveObserver(shelf_->shelf_layout_manager());
484 
485   // Deactivate keyboard container before closing child windows and shutting
486   // down associated layout managers.
487   DeactivateKeyboard(keyboard::KeyboardController::GetInstance());
488 
489   // panel_layout_manager_ needs to be shut down before windows are destroyed.
490   if (panel_layout_manager_) {
491     panel_layout_manager_->Shutdown();
492     panel_layout_manager_ = NULL;
493   }
494   // docked_layout_manager_ needs to be shut down before windows are destroyed.
495   if (docked_layout_manager_) {
496     docked_layout_manager_->Shutdown();
497     docked_layout_manager_ = NULL;
498   }
499   aura::Window* root_window = GetRootWindow();
500   aura::client::SetDragDropClient(root_window, NULL);
501 
502   // TODO(harrym): Remove when Status Area Widget is a child view.
503   if (shelf_) {
504     shelf_->ShutdownStatusAreaWidget();
505 
506     if (shelf_->shelf_layout_manager())
507       shelf_->shelf_layout_manager()->PrepareForShutdown();
508   }
509 
510   // Close background widget first as it depends on tooltip.
511   wallpaper_controller_.reset();
512   animating_wallpaper_controller_.reset();
513 
514   workspace_controller_.reset();
515   aura::client::SetTooltipClient(root_window, NULL);
516 
517   // Explicitly destroy top level windows. We do this as during part of
518   // destruction such windows may query the RootWindow for state.
519   std::queue<aura::Window*> non_toplevel_windows;
520   non_toplevel_windows.push(root_window);
521   while (!non_toplevel_windows.empty()) {
522     aura::Window* non_toplevel_window = non_toplevel_windows.front();
523     non_toplevel_windows.pop();
524     aura::WindowTracker toplevel_windows;
525     for (size_t i = 0; i < non_toplevel_window->children().size(); ++i) {
526       aura::Window* child = non_toplevel_window->children()[i];
527       if (!child->owned_by_parent())
528         continue;
529       if (child->delegate())
530         toplevel_windows.Add(child);
531       else
532         non_toplevel_windows.push(child);
533     }
534     while (!toplevel_windows.windows().empty())
535       delete *toplevel_windows.windows().begin();
536   }
537   // And then remove the containers.
538   while (!root_window->children().empty()) {
539     aura::Window* window = root_window->children()[0];
540     if (window->owned_by_parent()) {
541       delete window;
542     } else {
543       root_window->RemoveChild(window);
544     }
545   }
546 
547   shelf_.reset();
548 }
549 
MoveWindowsTo(aura::Window * dst)550 void RootWindowController::MoveWindowsTo(aura::Window* dst) {
551   // Forget the shelf early so that shelf don't update itself using wrong
552   // display info.
553   workspace_controller_->SetShelf(NULL);
554   ReparentAllWindows(GetRootWindow(), dst);
555 }
556 
GetShelfLayoutManager()557 ShelfLayoutManager* RootWindowController::GetShelfLayoutManager() {
558   return shelf_->shelf_layout_manager();
559 }
560 
GetSystemTray()561 SystemTray* RootWindowController::GetSystemTray() {
562   // We assume in throughout the code that this will not return NULL. If code
563   // triggers this for valid reasons, it should test status_area_widget first.
564   CHECK(shelf_->status_area_widget());
565   return shelf_->status_area_widget()->system_tray();
566 }
567 
ShowContextMenu(const gfx::Point & location_in_screen,ui::MenuSourceType source_type)568 void RootWindowController::ShowContextMenu(const gfx::Point& location_in_screen,
569                                            ui::MenuSourceType source_type) {
570   DCHECK(Shell::GetInstance()->delegate());
571   scoped_ptr<ui::MenuModel> menu_model(
572       Shell::GetInstance()->delegate()->CreateContextMenu(
573           GetRootWindow(), NULL, NULL));
574   if (!menu_model)
575     return;
576 
577   // Background controller may not be set yet if user clicked on status are
578   // before initial animation completion. See crbug.com/222218
579   if (!wallpaper_controller_.get())
580     return;
581 
582   views::MenuRunner menu_runner(menu_model.get(),
583                                 views::MenuRunner::CONTEXT_MENU);
584   if (menu_runner.RunMenuAt(wallpaper_controller_->widget(),
585                             NULL,
586                             gfx::Rect(location_in_screen, gfx::Size()),
587                             views::MENU_ANCHOR_TOPLEFT,
588                             source_type) == views::MenuRunner::MENU_DELETED) {
589     return;
590   }
591 
592   Shell::GetInstance()->UpdateShelfVisibility();
593 }
594 
UpdateShelfVisibility()595 void RootWindowController::UpdateShelfVisibility() {
596   shelf_->shelf_layout_manager()->UpdateVisibilityState();
597 }
598 
GetWindowForFullscreenMode() const599 const aura::Window* RootWindowController::GetWindowForFullscreenMode() const {
600   const aura::Window* topmost_window = NULL;
601   const aura::Window* active_window = wm::GetActiveWindow();
602   if (active_window && active_window->GetRootWindow() == GetRootWindow() &&
603       IsSwitchableContainer(active_window->parent())) {
604     // Use the active window when it is on the current root window to determine
605     // the fullscreen state to allow temporarily using a panel or docked window
606     // (which are always above the default container) while a fullscreen
607     // window is open. We only use the active window when in a switchable
608     // container as the launcher should not exit fullscreen mode.
609     topmost_window = active_window;
610   } else {
611     // Otherwise, use the topmost window on the root window's default container
612     // when there is no active window on this root window.
613     const aura::Window::Windows& windows =
614         GetContainer(kShellWindowId_DefaultContainer)->children();
615     for (aura::Window::Windows::const_reverse_iterator iter = windows.rbegin();
616          iter != windows.rend(); ++iter) {
617       if (((*iter)->type() == ui::wm::WINDOW_TYPE_NORMAL ||
618            (*iter)->type() == ui::wm::WINDOW_TYPE_PANEL) &&
619           (*iter)->layer()->GetTargetVisibility()) {
620         topmost_window = *iter;
621         break;
622       }
623     }
624   }
625   while (topmost_window) {
626     if (wm::GetWindowState(topmost_window)->IsFullscreen())
627       return topmost_window;
628     topmost_window = ::wm::GetTransientParent(topmost_window);
629   }
630   return NULL;
631 }
632 
ActivateKeyboard(keyboard::KeyboardController * keyboard_controller)633 void RootWindowController::ActivateKeyboard(
634     keyboard::KeyboardController* keyboard_controller) {
635   if (!keyboard::IsKeyboardEnabled() ||
636       GetContainer(kShellWindowId_VirtualKeyboardContainer)) {
637     return;
638   }
639   DCHECK(keyboard_controller);
640   keyboard_controller->AddObserver(shelf()->shelf_layout_manager());
641   keyboard_controller->AddObserver(panel_layout_manager_);
642   keyboard_controller->AddObserver(docked_layout_manager_);
643   keyboard_controller->AddObserver(workspace_controller_->layout_manager());
644   Shell::GetInstance()->delegate()->VirtualKeyboardActivated(true);
645   aura::Window* parent = GetContainer(
646       kShellWindowId_VirtualKeyboardParentContainer);
647   DCHECK(parent);
648   aura::Window* keyboard_container =
649       keyboard_controller->GetContainerWindow();
650   keyboard_container->set_id(kShellWindowId_VirtualKeyboardContainer);
651   parent->AddChild(keyboard_container);
652   // TODO(oshima): Bounds of keyboard container should be handled by
653   // RootWindowLayoutManager. Remove this after fixed RootWindowLayoutManager.
654   keyboard_container->SetBounds(parent->bounds());
655 }
656 
DeactivateKeyboard(keyboard::KeyboardController * keyboard_controller)657 void RootWindowController::DeactivateKeyboard(
658     keyboard::KeyboardController* keyboard_controller) {
659   if (!keyboard_controller ||
660       !keyboard_controller->keyboard_container_initialized()) {
661     return;
662   }
663   aura::Window* keyboard_container =
664       keyboard_controller->GetContainerWindow();
665   if (keyboard_container->GetRootWindow() == GetRootWindow()) {
666     aura::Window* parent = GetContainer(
667         kShellWindowId_VirtualKeyboardParentContainer);
668     DCHECK(parent);
669     parent->RemoveChild(keyboard_container);
670     // Virtual keyboard may be deactivated while still showing, notify all
671     // observers that keyboard bounds changed to 0 before remove them.
672     keyboard_controller->NotifyKeyboardBoundsChanging(gfx::Rect());
673     keyboard_controller->RemoveObserver(shelf()->shelf_layout_manager());
674     keyboard_controller->RemoveObserver(panel_layout_manager_);
675     keyboard_controller->RemoveObserver(docked_layout_manager_);
676     keyboard_controller->RemoveObserver(
677         workspace_controller_->layout_manager());
678     Shell::GetInstance()->delegate()->VirtualKeyboardActivated(false);
679   }
680 }
681 
IsVirtualKeyboardWindow(aura::Window * window)682 bool RootWindowController::IsVirtualKeyboardWindow(aura::Window* window) {
683   aura::Window* parent = GetContainer(
684       kShellWindowId_VirtualKeyboardParentContainer);
685   return parent ? parent->Contains(window) : false;
686 }
687 
688 ////////////////////////////////////////////////////////////////////////////////
689 // RootWindowController, private:
690 
RootWindowController(AshWindowTreeHost * ash_host)691 RootWindowController::RootWindowController(AshWindowTreeHost* ash_host)
692     : ash_host_(ash_host),
693       root_window_layout_(NULL),
694       docked_layout_manager_(NULL),
695       panel_layout_manager_(NULL),
696       touch_hud_debug_(NULL),
697       touch_hud_projection_(NULL) {
698   aura::Window* root_window = GetRootWindow();
699   GetRootWindowSettings(root_window)->controller = this;
700   screen_dimmer_.reset(new ScreenDimmer(root_window));
701 
702   stacking_controller_.reset(new StackingController);
703   aura::client::SetWindowTreeClient(root_window, stacking_controller_.get());
704   capture_client_.reset(new ::wm::ScopedCaptureClient(root_window));
705 }
706 
Init(RootWindowType root_window_type,bool first_run_after_boot)707 void RootWindowController::Init(RootWindowType root_window_type,
708                                 bool first_run_after_boot) {
709   aura::Window* root_window = GetRootWindow();
710   Shell* shell = Shell::GetInstance();
711   shell->InitRootWindow(root_window);
712 
713   ash_host_->AsWindowTreeHost()->SetCursor(ui::kCursorPointer);
714   CreateContainersInRootWindow(root_window);
715 
716   CreateSystemBackground(first_run_after_boot);
717 
718   InitLayoutManagers();
719   InitTouchHuds();
720 
721   if (Shell::GetPrimaryRootWindowController()->
722       GetSystemModalLayoutManager(NULL)->has_modal_background()) {
723     GetSystemModalLayoutManager(NULL)->CreateModalBackground();
724   }
725 
726   shell->AddShellObserver(this);
727 
728   if (root_window_type == PRIMARY) {
729     root_window_layout()->OnWindowResized();
730     shell->InitKeyboard();
731   } else {
732     root_window_layout()->OnWindowResized();
733     ash_host_->AsWindowTreeHost()->Show();
734 
735     // Create a shelf if a user is already logged in.
736     if (shell->session_state_delegate()->NumberOfLoggedInUsers())
737       shelf()->CreateShelf();
738 
739     // Notify shell observers about new root window.
740     shell->OnRootWindowAdded(root_window);
741   }
742 
743 #if defined(OS_CHROMEOS)
744   if (!CommandLine::ForCurrentProcess()->HasSwitch(
745           switches::kAshDisableTouchExplorationMode)) {
746     touch_exploration_manager_.reset(new AshTouchExplorationManager(this));
747   }
748 #endif
749 }
750 
InitLayoutManagers()751 void RootWindowController::InitLayoutManagers() {
752   aura::Window* root_window = GetRootWindow();
753   root_window_layout_ = new RootWindowLayoutManager(root_window);
754   root_window->SetLayoutManager(root_window_layout_);
755 
756   aura::Window* default_container =
757       GetContainer(kShellWindowId_DefaultContainer);
758   // Workspace manager has its own layout managers.
759   workspace_controller_.reset(
760       new WorkspaceController(default_container));
761 
762   aura::Window* always_on_top_container =
763       GetContainer(kShellWindowId_AlwaysOnTopContainer);
764   always_on_top_container->SetLayoutManager(
765       new WorkspaceLayoutManager(always_on_top_container));
766   always_on_top_controller_.reset(new AlwaysOnTopController);
767   always_on_top_controller_->SetAlwaysOnTopContainer(always_on_top_container);
768 
769   DCHECK(!shelf_.get());
770   aura::Window* shelf_container = GetContainer(kShellWindowId_ShelfContainer);
771   // TODO(harrym): Remove when status area is view.
772   aura::Window* status_container = GetContainer(kShellWindowId_StatusContainer);
773   shelf_.reset(new ShelfWidget(
774       shelf_container, status_container, workspace_controller()));
775 
776   if (!Shell::GetInstance()->session_state_delegate()->
777       IsActiveUserSessionStarted()) {
778     // This window exists only to be a event target on login screen.
779     // It does not have to handle events, nor be visible.
780     mouse_event_target_.reset(new aura::Window(new EmptyWindowDelegate));
781     mouse_event_target_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
782 
783     aura::Window* lock_background_container =
784         GetContainer(kShellWindowId_LockScreenBackgroundContainer);
785     lock_background_container->AddChild(mouse_event_target_.get());
786     mouse_event_target_->Show();
787   }
788 
789   // Create Docked windows layout manager
790   aura::Window* docked_container = GetContainer(kShellWindowId_DockedContainer);
791   docked_layout_manager_ =
792       new DockedWindowLayoutManager(docked_container, workspace_controller());
793   docked_container->SetLayoutManager(docked_layout_manager_);
794 
795   // Installs SnapLayoutManager to containers who set the
796   // |kSnapsChildrenToPhysicalPixelBoundary| property.
797   wm::InstallSnapLayoutManagerToContainers(root_window);
798 
799   // Create Panel layout manager
800   aura::Window* panel_container = GetContainer(kShellWindowId_PanelContainer);
801   panel_layout_manager_ = new PanelLayoutManager(panel_container);
802   panel_container->SetLayoutManager(panel_layout_manager_);
803   panel_container_handler_.reset(new PanelWindowEventHandler);
804   panel_container->AddPreTargetHandler(panel_container_handler_.get());
805 
806   // Install an AttachedPanelWindowTargeter on the panel container to make it
807   // easier to correctly target shelf buttons with touch.
808   gfx::Insets mouse_extend(-kResizeOutsideBoundsSize,
809                            -kResizeOutsideBoundsSize,
810                            -kResizeOutsideBoundsSize,
811                            -kResizeOutsideBoundsSize);
812   gfx::Insets touch_extend = mouse_extend.Scale(
813       kResizeOutsideBoundsScaleForTouch);
814   panel_container->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
815       new AttachedPanelWindowTargeter(panel_container,
816                                       mouse_extend,
817                                       touch_extend,
818                                       panel_layout_manager_)));
819 }
820 
InitTouchHuds()821 void RootWindowController::InitTouchHuds() {
822   CommandLine* command_line = CommandLine::ForCurrentProcess();
823   if (command_line->HasSwitch(switches::kAshTouchHud))
824     set_touch_hud_debug(new TouchHudDebug(GetRootWindow()));
825   if (Shell::GetInstance()->is_touch_hud_projection_enabled())
826     EnableTouchHudProjection();
827 }
828 
CreateSystemBackground(bool is_first_run_after_boot)829 void RootWindowController::CreateSystemBackground(
830     bool is_first_run_after_boot) {
831   SkColor color = SK_ColorBLACK;
832 #if defined(OS_CHROMEOS)
833   if (is_first_run_after_boot)
834     color = kChromeOsBootColor;
835 #endif
836   system_background_.reset(
837       new SystemBackgroundController(GetRootWindow(), color));
838 
839 #if defined(OS_CHROMEOS)
840   // Make a copy of the system's boot splash screen so we can composite it
841   // onscreen until the desktop background is ready.
842   if (is_first_run_after_boot &&
843       (CommandLine::ForCurrentProcess()->HasSwitch(
844            switches::kAshCopyHostBackgroundAtBoot) ||
845        CommandLine::ForCurrentProcess()->HasSwitch(
846            switches::kAshAnimateFromBootSplashScreen)))
847     boot_splash_screen_.reset(new BootSplashScreen(GetHost()));
848 #endif
849 }
850 
CreateContainersInRootWindow(aura::Window * root_window)851 void RootWindowController::CreateContainersInRootWindow(
852     aura::Window* root_window) {
853   // These containers are just used by PowerButtonController to animate groups
854   // of containers simultaneously without messing up the current transformations
855   // on those containers. These are direct children of the root window; all of
856   // the other containers are their children.
857 
858   // The desktop background container is not part of the lock animation, so it
859   // is not included in those animate groups.
860   // When screen is locked desktop background is moved to lock screen background
861   // container (moved back on unlock). We want to make sure that there's an
862   // opaque layer occluding the non-lock-screen layers.
863   aura::Window* desktop_background_container = CreateContainer(
864       kShellWindowId_DesktopBackgroundContainer,
865       "DesktopBackgroundContainer",
866       root_window);
867   ::wm::SetChildWindowVisibilityChangesAnimated(desktop_background_container);
868 
869   aura::Window* non_lock_screen_containers = CreateContainer(
870       kShellWindowId_NonLockScreenContainersContainer,
871       "NonLockScreenContainersContainer",
872       root_window);
873 
874   aura::Window* lock_background_containers = CreateContainer(
875       kShellWindowId_LockScreenBackgroundContainer,
876       "LockScreenBackgroundContainer",
877       root_window);
878   ::wm::SetChildWindowVisibilityChangesAnimated(lock_background_containers);
879 
880   aura::Window* lock_screen_containers = CreateContainer(
881       kShellWindowId_LockScreenContainersContainer,
882       "LockScreenContainersContainer",
883       root_window);
884   aura::Window* lock_screen_related_containers = CreateContainer(
885       kShellWindowId_LockScreenRelatedContainersContainer,
886       "LockScreenRelatedContainersContainer",
887       root_window);
888 
889   CreateContainer(kShellWindowId_UnparentedControlContainer,
890                   "UnparentedControlContainer",
891                   non_lock_screen_containers);
892 
893   aura::Window* default_container = CreateContainer(
894       kShellWindowId_DefaultContainer,
895       "DefaultContainer",
896       non_lock_screen_containers);
897   ::wm::SetChildWindowVisibilityChangesAnimated(default_container);
898   wm::SetSnapsChildrenToPhysicalPixelBoundary(default_container);
899   SetUsesScreenCoordinates(default_container);
900   SetUsesEasyResizeTargeter(default_container);
901 
902   aura::Window* always_on_top_container = CreateContainer(
903       kShellWindowId_AlwaysOnTopContainer,
904       "AlwaysOnTopContainer",
905       non_lock_screen_containers);
906   ::wm::SetChildWindowVisibilityChangesAnimated(always_on_top_container);
907   wm::SetSnapsChildrenToPhysicalPixelBoundary(always_on_top_container);
908   SetUsesScreenCoordinates(always_on_top_container);
909 
910   aura::Window* docked_container = CreateContainer(
911       kShellWindowId_DockedContainer,
912       "DockedContainer",
913       non_lock_screen_containers);
914   ::wm::SetChildWindowVisibilityChangesAnimated(docked_container);
915   wm::SetSnapsChildrenToPhysicalPixelBoundary(docked_container);
916   SetUsesScreenCoordinates(docked_container);
917   SetUsesEasyResizeTargeter(docked_container);
918 
919   aura::Window* shelf_container =
920       CreateContainer(kShellWindowId_ShelfContainer,
921                       "ShelfContainer",
922                       non_lock_screen_containers);
923   wm::SetSnapsChildrenToPhysicalPixelBoundary(shelf_container);
924   SetUsesScreenCoordinates(shelf_container);
925   DescendantShouldStayInSameRootWindow(shelf_container);
926 
927   aura::Window* panel_container = CreateContainer(
928       kShellWindowId_PanelContainer,
929       "PanelContainer",
930       non_lock_screen_containers);
931   wm::SetSnapsChildrenToPhysicalPixelBoundary(panel_container);
932   SetUsesScreenCoordinates(panel_container);
933 
934   aura::Window* shelf_bubble_container =
935       CreateContainer(kShellWindowId_ShelfBubbleContainer,
936                       "ShelfBubbleContainer",
937                       non_lock_screen_containers);
938   wm::SetSnapsChildrenToPhysicalPixelBoundary(shelf_bubble_container);
939   SetUsesScreenCoordinates(shelf_bubble_container);
940   DescendantShouldStayInSameRootWindow(shelf_bubble_container);
941 
942   aura::Window* app_list_container =
943       CreateContainer(kShellWindowId_AppListContainer,
944                       "AppListContainer",
945                       non_lock_screen_containers);
946   wm::SetSnapsChildrenToPhysicalPixelBoundary(app_list_container);
947   SetUsesScreenCoordinates(app_list_container);
948 
949   aura::Window* modal_container = CreateContainer(
950       kShellWindowId_SystemModalContainer,
951       "SystemModalContainer",
952       non_lock_screen_containers);
953   wm::SetSnapsChildrenToPhysicalPixelBoundary(modal_container);
954   modal_container->SetLayoutManager(
955       new SystemModalContainerLayoutManager(modal_container));
956   ::wm::SetChildWindowVisibilityChangesAnimated(modal_container);
957   SetUsesScreenCoordinates(modal_container);
958   SetUsesEasyResizeTargeter(modal_container);
959 
960   // TODO(beng): Figure out if we can make this use
961   // SystemModalContainerEventFilter instead of stops_event_propagation.
962   aura::Window* lock_container = CreateContainer(
963       kShellWindowId_LockScreenContainer,
964       "LockScreenContainer",
965       lock_screen_containers);
966   wm::SetSnapsChildrenToPhysicalPixelBoundary(lock_container);
967   if (CommandLine::ForCurrentProcess()->HasSwitch(
968           switches::kAshDisableLockLayoutManager)) {
969     lock_container->SetLayoutManager(
970             new WorkspaceLayoutManager(lock_container));
971   } else {
972     lock_container->SetLayoutManager(new LockLayoutManager(lock_container));
973   }
974   SetUsesScreenCoordinates(lock_container);
975   // TODO(beng): stopsevents
976 
977   aura::Window* lock_modal_container = CreateContainer(
978       kShellWindowId_LockSystemModalContainer,
979       "LockSystemModalContainer",
980       lock_screen_containers);
981   wm::SetSnapsChildrenToPhysicalPixelBoundary(lock_modal_container);
982   lock_modal_container->SetLayoutManager(
983       new SystemModalContainerLayoutManager(lock_modal_container));
984   ::wm::SetChildWindowVisibilityChangesAnimated(lock_modal_container);
985   SetUsesScreenCoordinates(lock_modal_container);
986   SetUsesEasyResizeTargeter(lock_modal_container);
987 
988   aura::Window* status_container =
989       CreateContainer(kShellWindowId_StatusContainer,
990                       "StatusContainer",
991                       lock_screen_related_containers);
992   wm::SetSnapsChildrenToPhysicalPixelBoundary(status_container);
993   SetUsesScreenCoordinates(status_container);
994   DescendantShouldStayInSameRootWindow(status_container);
995 
996   aura::Window* settings_bubble_container = CreateContainer(
997       kShellWindowId_SettingBubbleContainer,
998       "SettingBubbleContainer",
999       lock_screen_related_containers);
1000   ::wm::SetChildWindowVisibilityChangesAnimated(settings_bubble_container);
1001   wm::SetSnapsChildrenToPhysicalPixelBoundary(settings_bubble_container);
1002   SetUsesScreenCoordinates(settings_bubble_container);
1003   DescendantShouldStayInSameRootWindow(settings_bubble_container);
1004 
1005   aura::Window* virtual_keyboard_parent_container =
1006       CreateContainer(kShellWindowId_VirtualKeyboardParentContainer,
1007                       "VirtualKeyboardParentContainer",
1008                       lock_screen_related_containers);
1009   wm::SetSnapsChildrenToPhysicalPixelBoundary(
1010       virtual_keyboard_parent_container);
1011   virtual_keyboard_parent_container->SetLayoutManager(
1012       new VirtualKeyboardContainerLayoutManager(
1013           virtual_keyboard_parent_container));
1014   SetUsesScreenCoordinates(virtual_keyboard_parent_container);
1015 
1016   aura::Window* menu_container = CreateContainer(
1017       kShellWindowId_MenuContainer,
1018       "MenuContainer",
1019       lock_screen_related_containers);
1020   ::wm::SetChildWindowVisibilityChangesAnimated(menu_container);
1021   wm::SetSnapsChildrenToPhysicalPixelBoundary(menu_container);
1022   SetUsesScreenCoordinates(menu_container);
1023 
1024   aura::Window* drag_drop_container = CreateContainer(
1025       kShellWindowId_DragImageAndTooltipContainer,
1026       "DragImageAndTooltipContainer",
1027       lock_screen_related_containers);
1028   ::wm::SetChildWindowVisibilityChangesAnimated(drag_drop_container);
1029   wm::SetSnapsChildrenToPhysicalPixelBoundary(drag_drop_container);
1030   SetUsesScreenCoordinates(drag_drop_container);
1031 
1032   aura::Window* overlay_container = CreateContainer(
1033       kShellWindowId_OverlayContainer,
1034       "OverlayContainer",
1035       lock_screen_related_containers);
1036   wm::SetSnapsChildrenToPhysicalPixelBoundary(overlay_container);
1037   SetUsesScreenCoordinates(overlay_container);
1038 
1039 #if defined(OS_CHROMEOS)
1040   aura::Window* mouse_cursor_container = CreateContainer(
1041       kShellWindowId_MouseCursorContainer,
1042       "MouseCursorContainer",
1043       root_window);
1044   SetUsesScreenCoordinates(mouse_cursor_container);
1045 #endif
1046 
1047   CreateContainer(kShellWindowId_PowerButtonAnimationContainer,
1048                   "PowerButtonAnimationContainer", root_window);
1049 }
1050 
EnableTouchHudProjection()1051 void RootWindowController::EnableTouchHudProjection() {
1052   if (touch_hud_projection_)
1053     return;
1054   set_touch_hud_projection(new TouchHudProjection(GetRootWindow()));
1055 }
1056 
DisableTouchHudProjection()1057 void RootWindowController::DisableTouchHudProjection() {
1058   if (!touch_hud_projection_)
1059     return;
1060   touch_hud_projection_->Remove();
1061 }
1062 
OnLoginStateChanged(user::LoginStatus status)1063 void RootWindowController::OnLoginStateChanged(user::LoginStatus status) {
1064   shelf_->shelf_layout_manager()->UpdateVisibilityState();
1065 }
1066 
OnTouchHudProjectionToggled(bool enabled)1067 void RootWindowController::OnTouchHudProjectionToggled(bool enabled) {
1068   if (enabled)
1069     EnableTouchHudProjection();
1070   else
1071     DisableTouchHudProjection();
1072 }
1073 
GetRootWindowController(const aura::Window * root_window)1074 RootWindowController* GetRootWindowController(
1075     const aura::Window* root_window) {
1076   return root_window ? GetRootWindowSettings(root_window)->controller : NULL;
1077 }
1078 
1079 }  // namespace ash
1080