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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/shell.h"
6 
7 #include <algorithm>
8 #include <string>
9 
10 #include "ash/accelerators/accelerator_controller.h"
11 #include "ash/accelerators/accelerator_delegate.h"
12 #include "ash/accelerators/focus_manager_factory.h"
13 #include "ash/accelerators/nested_accelerator_delegate.h"
14 #include "ash/accelerometer/accelerometer_controller.h"
15 #include "ash/ash_switches.h"
16 #include "ash/autoclick/autoclick_controller.h"
17 #include "ash/desktop_background/desktop_background_controller.h"
18 #include "ash/desktop_background/desktop_background_view.h"
19 #include "ash/desktop_background/user_wallpaper_delegate.h"
20 #include "ash/display/cursor_window_controller.h"
21 #include "ash/display/display_controller.h"
22 #include "ash/display/display_manager.h"
23 #include "ash/display/event_transformation_handler.h"
24 #include "ash/display/mouse_cursor_event_filter.h"
25 #include "ash/display/screen_position_controller.h"
26 #include "ash/display/virtual_keyboard_window_controller.h"
27 #include "ash/drag_drop/drag_drop_controller.h"
28 #include "ash/first_run/first_run_helper_impl.h"
29 #include "ash/focus_cycler.h"
30 #include "ash/frame/custom_frame_view_ash.h"
31 #include "ash/gpu_support.h"
32 #include "ash/high_contrast/high_contrast_controller.h"
33 #include "ash/host/ash_window_tree_host_init_params.h"
34 #include "ash/keyboard_uma_event_filter.h"
35 #include "ash/magnifier/magnification_controller.h"
36 #include "ash/magnifier/partial_magnification_controller.h"
37 #include "ash/media_delegate.h"
38 #include "ash/new_window_delegate.h"
39 #include "ash/root_window_controller.h"
40 #include "ash/session/session_state_delegate.h"
41 #include "ash/shelf/app_list_shelf_item_delegate.h"
42 #include "ash/shelf/shelf_delegate.h"
43 #include "ash/shelf/shelf_item_delegate.h"
44 #include "ash/shelf/shelf_item_delegate_manager.h"
45 #include "ash/shelf/shelf_layout_manager.h"
46 #include "ash/shelf/shelf_model.h"
47 #include "ash/shelf/shelf_widget.h"
48 #include "ash/shelf/shelf_window_watcher.h"
49 #include "ash/shell_delegate.h"
50 #include "ash/shell_factory.h"
51 #include "ash/shell_init_params.h"
52 #include "ash/shell_window_ids.h"
53 #include "ash/system/locale/locale_notification_controller.h"
54 #include "ash/system/status_area_widget.h"
55 #include "ash/system/tray/system_tray_delegate.h"
56 #include "ash/system/tray/system_tray_notifier.h"
57 #include "ash/wm/app_list_controller.h"
58 #include "ash/wm/ash_focus_rules.h"
59 #include "ash/wm/ash_native_cursor_manager.h"
60 #include "ash/wm/coordinate_conversion.h"
61 #include "ash/wm/event_client_impl.h"
62 #include "ash/wm/lock_state_controller.h"
63 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
64 #include "ash/wm/maximize_mode/maximize_mode_window_manager.h"
65 #include "ash/wm/mru_window_tracker.h"
66 #include "ash/wm/overlay_event_filter.h"
67 #include "ash/wm/overview/window_selector_controller.h"
68 #include "ash/wm/power_button_controller.h"
69 #include "ash/wm/resize_shadow_controller.h"
70 #include "ash/wm/root_window_layout_manager.h"
71 #include "ash/wm/screen_dimmer.h"
72 #include "ash/wm/system_gesture_event_filter.h"
73 #include "ash/wm/system_modal_container_event_filter.h"
74 #include "ash/wm/system_modal_container_layout_manager.h"
75 #include "ash/wm/toplevel_window_event_handler.h"
76 #include "ash/wm/video_detector.h"
77 #include "ash/wm/window_animations.h"
78 #include "ash/wm/window_cycle_controller.h"
79 #include "ash/wm/window_positioner.h"
80 #include "ash/wm/window_properties.h"
81 #include "ash/wm/window_util.h"
82 #include "ash/wm/workspace_controller.h"
83 #include "base/bind.h"
84 #include "base/debug/trace_event.h"
85 #include "ui/aura/client/aura_constants.h"
86 #include "ui/aura/env.h"
87 #include "ui/aura/layout_manager.h"
88 #include "ui/aura/window.h"
89 #include "ui/aura/window_event_dispatcher.h"
90 #include "ui/base/ui_base_switches.h"
91 #include "ui/compositor/layer.h"
92 #include "ui/compositor/layer_animator.h"
93 #include "ui/events/event_target_iterator.h"
94 #include "ui/gfx/display.h"
95 #include "ui/gfx/image/image_skia.h"
96 #include "ui/gfx/screen.h"
97 #include "ui/gfx/size.h"
98 #include "ui/keyboard/keyboard.h"
99 #include "ui/keyboard/keyboard_controller.h"
100 #include "ui/keyboard/keyboard_switches.h"
101 #include "ui/keyboard/keyboard_util.h"
102 #include "ui/message_center/message_center.h"
103 #include "ui/views/corewm/tooltip_aura.h"
104 #include "ui/views/corewm/tooltip_controller.h"
105 #include "ui/views/focus/focus_manager_factory.h"
106 #include "ui/views/widget/native_widget_aura.h"
107 #include "ui/views/widget/widget.h"
108 #include "ui/wm/core/accelerator_filter.h"
109 #include "ui/wm/core/compound_event_filter.h"
110 #include "ui/wm/core/focus_controller.h"
111 #include "ui/wm/core/input_method_event_filter.h"
112 #include "ui/wm/core/nested_accelerator_controller.h"
113 #include "ui/wm/core/shadow_controller.h"
114 #include "ui/wm/core/user_activity_detector.h"
115 #include "ui/wm/core/visibility_controller.h"
116 #include "ui/wm/core/window_modality_controller.h"
117 
118 #if defined(OS_CHROMEOS)
119 #if defined(USE_X11)
120 #include "ash/accelerators/magnifier_key_scroller.h"
121 #include "ash/accelerators/spoken_feedback_toggler.h"
122 #include "ash/touch/touch_transformer_controller.h"
123 #include "ui/gfx/x/x11_types.h"
124 #endif  // defined(USE_X11)
125 #include "ash/ash_constants.h"
126 #include "ash/display/display_change_observer_chromeos.h"
127 #include "ash/display/display_configurator_animation.h"
128 #include "ash/display/display_error_observer_chromeos.h"
129 #include "ash/display/projecting_observer_chromeos.h"
130 #include "ash/display/resolution_notification_controller.h"
131 #include "ash/sticky_keys/sticky_keys_controller.h"
132 #include "ash/system/chromeos/bluetooth/bluetooth_notification_controller.h"
133 #include "ash/system/chromeos/brightness/brightness_controller_chromeos.h"
134 #include "ash/system/chromeos/power/power_event_observer.h"
135 #include "ash/system/chromeos/power/power_status.h"
136 #include "ash/system/chromeos/power/video_activity_notifier.h"
137 #include "ash/system/chromeos/session/last_window_closed_logout_reminder.h"
138 #include "ash/system/chromeos/session/logout_confirmation_controller.h"
139 #include "base/bind_helpers.h"
140 #include "base/sys_info.h"
141 #include "ui/chromeos/user_activity_power_manager_notifier.h"
142 #include "ui/display/chromeos/display_configurator.h"
143 #endif  // defined(OS_CHROMEOS)
144 
145 namespace ash {
146 
147 namespace {
148 
149 using aura::Window;
150 using views::Widget;
151 
152 // A Corewm VisibilityController subclass that calls the Ash animation routine
153 // so we can pick up our extended animations. See ash/wm/window_animations.h.
154 class AshVisibilityController : public ::wm::VisibilityController {
155  public:
AshVisibilityController()156   AshVisibilityController() {}
~AshVisibilityController()157   virtual ~AshVisibilityController() {}
158 
159  private:
160   // Overridden from ::wm::VisibilityController:
CallAnimateOnChildWindowVisibilityChanged(aura::Window * window,bool visible)161   virtual bool CallAnimateOnChildWindowVisibilityChanged(
162       aura::Window* window,
163       bool visible) OVERRIDE {
164     return AnimateOnChildWindowVisibilityChanged(window, visible);
165   }
166 
167   DISALLOW_COPY_AND_ASSIGN(AshVisibilityController);
168 };
169 
ShellInitParamsToAshWindowTreeHostInitParams(const ShellInitParams & shell_init_params)170 AshWindowTreeHostInitParams ShellInitParamsToAshWindowTreeHostInitParams(
171     const ShellInitParams& shell_init_params) {
172   AshWindowTreeHostInitParams ash_init_params;
173 #if defined(OS_WIN)
174   ash_init_params.remote_hwnd = shell_init_params.remote_hwnd;
175 #endif
176   return ash_init_params;
177 }
178 
179 }  // namespace
180 
181 // static
182 Shell* Shell::instance_ = NULL;
183 // static
184 bool Shell::initially_hide_cursor_ = false;
185 
186 ////////////////////////////////////////////////////////////////////////////////
187 // Shell, public:
188 
189 // static
CreateInstance(const ShellInitParams & init_params)190 Shell* Shell::CreateInstance(const ShellInitParams& init_params) {
191   CHECK(!instance_);
192   instance_ = new Shell(init_params.delegate);
193   instance_->Init(init_params);
194   return instance_;
195 }
196 
197 // static
GetInstance()198 Shell* Shell::GetInstance() {
199   DCHECK(instance_);
200   return instance_;
201 }
202 
203 // static
HasInstance()204 bool Shell::HasInstance() {
205   return !!instance_;
206 }
207 
208 // static
DeleteInstance()209 void Shell::DeleteInstance() {
210   delete instance_;
211   instance_ = NULL;
212 }
213 
214 // static
GetPrimaryRootWindowController()215 RootWindowController* Shell::GetPrimaryRootWindowController() {
216   return GetRootWindowController(GetPrimaryRootWindow());
217 }
218 
219 // static
GetAllRootWindowControllers()220 Shell::RootWindowControllerList Shell::GetAllRootWindowControllers() {
221   return Shell::GetInstance()->display_controller()->
222       GetAllRootWindowControllers();
223 }
224 
225 // static
GetPrimaryRootWindow()226 aura::Window* Shell::GetPrimaryRootWindow() {
227   return GetInstance()->display_controller()->GetPrimaryRootWindow();
228 }
229 
230 // static
GetTargetRootWindow()231 aura::Window* Shell::GetTargetRootWindow() {
232   Shell* shell = GetInstance();
233   if (shell->scoped_target_root_window_)
234     return shell->scoped_target_root_window_;
235   return shell->target_root_window_;
236 }
237 
238 // static
GetScreen()239 gfx::Screen* Shell::GetScreen() {
240   return gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_ALTERNATE);
241 }
242 
243 // static
GetAllRootWindows()244 aura::Window::Windows Shell::GetAllRootWindows() {
245   return Shell::GetInstance()->display_controller()->
246       GetAllRootWindows();
247 }
248 
249 // static
GetContainer(aura::Window * root_window,int container_id)250 aura::Window* Shell::GetContainer(aura::Window* root_window,
251                                   int container_id) {
252   return root_window->GetChildById(container_id);
253 }
254 
255 // static
GetContainer(const aura::Window * root_window,int container_id)256 const aura::Window* Shell::GetContainer(const aura::Window* root_window,
257                                         int container_id) {
258   return root_window->GetChildById(container_id);
259 }
260 
261 // static
GetContainersFromAllRootWindows(int container_id,aura::Window * priority_root)262 std::vector<aura::Window*> Shell::GetContainersFromAllRootWindows(
263     int container_id,
264     aura::Window* priority_root) {
265   std::vector<aura::Window*> containers;
266   aura::Window::Windows root_windows = GetAllRootWindows();
267   for (aura::Window::Windows::const_iterator it = root_windows.begin();
268        it != root_windows.end(); ++it) {
269     aura::Window* container = (*it)->GetChildById(container_id);
270     if (container) {
271       if (priority_root && priority_root->Contains(container))
272         containers.insert(containers.begin(), container);
273       else
274         containers.push_back(container);
275     }
276   }
277   return containers;
278 }
279 
ShowContextMenu(const gfx::Point & location_in_screen,ui::MenuSourceType source_type)280 void Shell::ShowContextMenu(const gfx::Point& location_in_screen,
281                             ui::MenuSourceType source_type) {
282   // No context menus if there is no session with an active user.
283   if (!session_state_delegate_->NumberOfLoggedInUsers())
284     return;
285   // No context menus when screen is locked.
286   if (session_state_delegate_->IsScreenLocked())
287     return;
288 
289   aura::Window* root =
290       wm::GetRootWindowMatching(gfx::Rect(location_in_screen, gfx::Size()));
291   GetRootWindowController(root)
292       ->ShowContextMenu(location_in_screen, source_type);
293 }
294 
ToggleAppList(aura::Window * window)295 void Shell::ToggleAppList(aura::Window* window) {
296   // If the context window is not given, show it on the target root window.
297   if (!window)
298     window = GetTargetRootWindow();
299   if (!app_list_controller_)
300     app_list_controller_.reset(new AppListController);
301   app_list_controller_->SetVisible(!app_list_controller_->IsVisible(), window);
302 }
303 
GetAppListTargetVisibility() const304 bool Shell::GetAppListTargetVisibility() const {
305   return app_list_controller_.get() &&
306       app_list_controller_->GetTargetVisibility();
307 }
308 
GetAppListWindow()309 aura::Window* Shell::GetAppListWindow() {
310   return app_list_controller_.get() ? app_list_controller_->GetWindow() : NULL;
311 }
312 
GetAppListView()313 app_list::AppListView* Shell::GetAppListView() {
314   return app_list_controller_.get() ? app_list_controller_->GetView() : NULL;
315 }
316 
IsSystemModalWindowOpen() const317 bool Shell::IsSystemModalWindowOpen() const {
318   if (simulate_modal_window_open_for_testing_)
319     return true;
320   const std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
321       kShellWindowId_SystemModalContainer, NULL);
322   for (std::vector<aura::Window*>::const_iterator cit = containers.begin();
323        cit != containers.end(); ++cit) {
324     for (aura::Window::Windows::const_iterator wit = (*cit)->children().begin();
325          wit != (*cit)->children().end(); ++wit) {
326       if ((*wit)->GetProperty(aura::client::kModalKey) ==
327           ui::MODAL_TYPE_SYSTEM && (*wit)->TargetVisibility()) {
328         return true;
329       }
330     }
331   }
332   return false;
333 }
334 
CreateDefaultNonClientFrameView(views::Widget * widget)335 views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
336     views::Widget* widget) {
337   // Use translucent-style window frames for dialogs.
338   return new CustomFrameViewAsh(widget);
339 }
340 
RotateFocus(Direction direction)341 void Shell::RotateFocus(Direction direction) {
342   focus_cycler_->RotateFocus(direction == FORWARD ? FocusCycler::FORWARD
343                                                   : FocusCycler::BACKWARD);
344 }
345 
SetDisplayWorkAreaInsets(Window * contains,const gfx::Insets & insets)346 void Shell::SetDisplayWorkAreaInsets(Window* contains,
347                                      const gfx::Insets& insets) {
348   if (!display_controller_->UpdateWorkAreaOfDisplayNearestWindow(
349           contains, insets)) {
350     return;
351   }
352   FOR_EACH_OBSERVER(ShellObserver, observers_,
353                     OnDisplayWorkAreaInsetsChanged());
354 }
355 
OnLoginStateChanged(user::LoginStatus status)356 void Shell::OnLoginStateChanged(user::LoginStatus status) {
357   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLoginStateChanged(status));
358 }
359 
OnLoginUserProfilePrepared()360 void Shell::OnLoginUserProfilePrepared() {
361   CreateShelf();
362   CreateKeyboard();
363 }
364 
UpdateAfterLoginStatusChange(user::LoginStatus status)365 void Shell::UpdateAfterLoginStatusChange(user::LoginStatus status) {
366   RootWindowControllerList controllers = GetAllRootWindowControllers();
367   for (RootWindowControllerList::iterator iter = controllers.begin();
368        iter != controllers.end(); ++iter)
369     (*iter)->UpdateAfterLoginStatusChange(status);
370 }
371 
OnAppTerminating()372 void Shell::OnAppTerminating() {
373   FOR_EACH_OBSERVER(ShellObserver, observers_, OnAppTerminating());
374 }
375 
OnLockStateChanged(bool locked)376 void Shell::OnLockStateChanged(bool locked) {
377   FOR_EACH_OBSERVER(ShellObserver, observers_, OnLockStateChanged(locked));
378 #ifndef NDEBUG
379   // Make sure that there is no system modal in Lock layer when unlocked.
380   if (!locked) {
381     std::vector<aura::Window*> containers = GetContainersFromAllRootWindows(
382         kShellWindowId_LockSystemModalContainer, GetPrimaryRootWindow());
383     for (std::vector<aura::Window*>::const_iterator iter = containers.begin();
384          iter != containers.end(); ++iter) {
385       DCHECK_EQ(0u, (*iter)->children().size());
386     }
387   }
388 #endif
389 }
390 
OnCastingSessionStartedOrStopped(bool started)391 void Shell::OnCastingSessionStartedOrStopped(bool started) {
392 #if defined(OS_CHROMEOS) && defined(USE_X11)
393   if (projecting_observer_)
394     projecting_observer_->OnCastingSessionStartedOrStopped(started);
395 #endif
396 }
397 
OnOverviewModeStarting()398 void Shell::OnOverviewModeStarting() {
399   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeStarting());
400 }
401 
OnOverviewModeEnding()402 void Shell::OnOverviewModeEnding() {
403   FOR_EACH_OBSERVER(ShellObserver, observers_, OnOverviewModeEnding());
404 }
405 
OnMaximizeModeStarted()406 void Shell::OnMaximizeModeStarted() {
407   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeStarted());
408 }
409 
OnMaximizeModeEnded()410 void Shell::OnMaximizeModeEnded() {
411   FOR_EACH_OBSERVER(ShellObserver, observers_, OnMaximizeModeEnded());
412 }
413 
OnRootWindowAdded(aura::Window * root_window)414 void Shell::OnRootWindowAdded(aura::Window* root_window) {
415   FOR_EACH_OBSERVER(ShellObserver, observers_, OnRootWindowAdded(root_window));
416 }
417 
CreateShelf()418 void Shell::CreateShelf() {
419   RootWindowControllerList controllers = GetAllRootWindowControllers();
420   for (RootWindowControllerList::iterator iter = controllers.begin();
421        iter != controllers.end(); ++iter)
422     (*iter)->shelf()->CreateShelf();
423 }
424 
OnShelfCreatedForRootWindow(aura::Window * root_window)425 void Shell::OnShelfCreatedForRootWindow(aura::Window* root_window) {
426   FOR_EACH_OBSERVER(ShellObserver,
427                     observers_,
428                     OnShelfCreatedForRootWindow(root_window));
429 }
430 
CreateKeyboard()431 void Shell::CreateKeyboard() {
432   // TODO(bshe): Primary root window controller may not be the controller to
433   // attach virtual keyboard. See http://crbug.com/303429
434   InitKeyboard();
435   if (keyboard::IsKeyboardUsabilityExperimentEnabled()) {
436     display_controller()->virtual_keyboard_window_controller()->
437         ActivateKeyboard(keyboard::KeyboardController::GetInstance());
438   } else {
439     GetPrimaryRootWindowController()->
440         ActivateKeyboard(keyboard::KeyboardController::GetInstance());
441   }
442 }
443 
DeactivateKeyboard()444 void Shell::DeactivateKeyboard() {
445   if (keyboard::KeyboardController::GetInstance()) {
446     RootWindowControllerList controllers = GetAllRootWindowControllers();
447     for (RootWindowControllerList::iterator iter = controllers.begin();
448         iter != controllers.end(); ++iter) {
449       (*iter)->DeactivateKeyboard(keyboard::KeyboardController::GetInstance());
450     }
451   }
452   keyboard::KeyboardController::ResetInstance(NULL);
453 }
454 
ShowShelf()455 void Shell::ShowShelf() {
456   RootWindowControllerList controllers = GetAllRootWindowControllers();
457   for (RootWindowControllerList::iterator iter = controllers.begin();
458        iter != controllers.end(); ++iter)
459     (*iter)->ShowShelf();
460 }
461 
AddShellObserver(ShellObserver * observer)462 void Shell::AddShellObserver(ShellObserver* observer) {
463   observers_.AddObserver(observer);
464 }
465 
RemoveShellObserver(ShellObserver * observer)466 void Shell::RemoveShellObserver(ShellObserver* observer) {
467   observers_.RemoveObserver(observer);
468 }
469 
470 #if defined(OS_CHROMEOS)
ShouldSaveDisplaySettings()471 bool Shell::ShouldSaveDisplaySettings() {
472   return !((maximize_mode_controller_->IsMaximizeModeWindowManagerEnabled() &&
473             maximize_mode_controller_->in_set_screen_rotation()) ||
474            resolution_notification_controller_->DoesNotificationTimeout());
475 }
476 #endif
477 
UpdateShelfVisibility()478 void Shell::UpdateShelfVisibility() {
479   RootWindowControllerList controllers = GetAllRootWindowControllers();
480   for (RootWindowControllerList::iterator iter = controllers.begin();
481        iter != controllers.end(); ++iter)
482     if ((*iter)->shelf())
483       (*iter)->UpdateShelfVisibility();
484 }
485 
SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior,aura::Window * root_window)486 void Shell::SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior,
487                                      aura::Window* root_window) {
488   ash::ShelfLayoutManager::ForShelf(root_window)->SetAutoHideBehavior(behavior);
489 }
490 
GetShelfAutoHideBehavior(aura::Window * root_window) const491 ShelfAutoHideBehavior Shell::GetShelfAutoHideBehavior(
492     aura::Window* root_window) const {
493   return ash::ShelfLayoutManager::ForShelf(root_window)->auto_hide_behavior();
494 }
495 
SetShelfAlignment(ShelfAlignment alignment,aura::Window * root_window)496 void Shell::SetShelfAlignment(ShelfAlignment alignment,
497                               aura::Window* root_window) {
498   if (ash::ShelfLayoutManager::ForShelf(root_window)->SetAlignment(alignment)) {
499     FOR_EACH_OBSERVER(
500         ShellObserver, observers_, OnShelfAlignmentChanged(root_window));
501   }
502 }
503 
GetShelfAlignment(const aura::Window * root_window)504 ShelfAlignment Shell::GetShelfAlignment(const aura::Window* root_window) {
505   return GetRootWindowController(root_window)
506       ->GetShelfLayoutManager()
507       ->GetAlignment();
508 }
509 
SetDimming(bool should_dim)510 void Shell::SetDimming(bool should_dim) {
511   RootWindowControllerList controllers = GetAllRootWindowControllers();
512   for (RootWindowControllerList::iterator iter = controllers.begin();
513        iter != controllers.end(); ++iter)
514     (*iter)->screen_dimmer()->SetDimming(should_dim);
515 }
516 
NotifyFullscreenStateChange(bool is_fullscreen,aura::Window * root_window)517 void Shell::NotifyFullscreenStateChange(bool is_fullscreen,
518                                         aura::Window* root_window) {
519   FOR_EACH_OBSERVER(ShellObserver, observers_, OnFullscreenStateChanged(
520       is_fullscreen, root_window));
521 }
522 
CreateModalBackground(aura::Window * window)523 void Shell::CreateModalBackground(aura::Window* window) {
524   if (!modality_filter_) {
525     modality_filter_.reset(new SystemModalContainerEventFilter(this));
526     AddPreTargetHandler(modality_filter_.get());
527   }
528   RootWindowControllerList controllers = GetAllRootWindowControllers();
529   for (RootWindowControllerList::iterator iter = controllers.begin();
530        iter != controllers.end(); ++iter)
531     (*iter)->GetSystemModalLayoutManager(window)->CreateModalBackground();
532 }
533 
OnModalWindowRemoved(aura::Window * removed)534 void Shell::OnModalWindowRemoved(aura::Window* removed) {
535   RootWindowControllerList controllers = GetAllRootWindowControllers();
536   bool activated = false;
537   for (RootWindowControllerList::iterator iter = controllers.begin();
538        iter != controllers.end() && !activated; ++iter) {
539     activated = (*iter)->GetSystemModalLayoutManager(removed)->
540         ActivateNextModalWindow();
541   }
542   if (!activated) {
543     RemovePreTargetHandler(modality_filter_.get());
544     modality_filter_.reset();
545     for (RootWindowControllerList::iterator iter = controllers.begin();
546          iter != controllers.end(); ++iter)
547       (*iter)->GetSystemModalLayoutManager(removed)->DestroyModalBackground();
548   }
549 }
550 
GetWebNotificationTray()551 WebNotificationTray* Shell::GetWebNotificationTray() {
552   return GetPrimaryRootWindowController()->shelf()->
553       status_area_widget()->web_notification_tray();
554 }
555 
HasPrimaryStatusArea()556 bool Shell::HasPrimaryStatusArea() {
557   ShelfWidget* shelf = GetPrimaryRootWindowController()->shelf();
558   return shelf && shelf->status_area_widget();
559 }
560 
GetPrimarySystemTray()561 SystemTray* Shell::GetPrimarySystemTray() {
562   return GetPrimaryRootWindowController()->GetSystemTray();
563 }
564 
GetShelfDelegate()565 ShelfDelegate* Shell::GetShelfDelegate() {
566   if (!shelf_delegate_) {
567     shelf_model_.reset(new ShelfModel);
568     // Creates ShelfItemDelegateManager before ShelfDelegate.
569     shelf_item_delegate_manager_.reset(
570         new ShelfItemDelegateManager(shelf_model_.get()));
571 
572     shelf_delegate_.reset(delegate_->CreateShelfDelegate(shelf_model_.get()));
573     scoped_ptr<ShelfItemDelegate> controller(new AppListShelfItemDelegate);
574 
575     // Finding the shelf model's location of the app list and setting its
576     // ShelfItemDelegate.
577     int app_list_index = shelf_model_->GetItemIndexForType(TYPE_APP_LIST);
578     DCHECK_GE(app_list_index, 0);
579     ShelfID app_list_id = shelf_model_->items()[app_list_index].id;
580     DCHECK(app_list_id);
581     shelf_item_delegate_manager_->SetShelfItemDelegate(app_list_id,
582                                                        controller.Pass());
583     shelf_window_watcher_.reset(new ShelfWindowWatcher(
584         shelf_model_.get(), shelf_item_delegate_manager_.get()));
585   }
586   return shelf_delegate_.get();
587 }
588 
SetTouchHudProjectionEnabled(bool enabled)589 void Shell::SetTouchHudProjectionEnabled(bool enabled) {
590   if (is_touch_hud_projection_enabled_ == enabled)
591     return;
592 
593   is_touch_hud_projection_enabled_ = enabled;
594   FOR_EACH_OBSERVER(ShellObserver, observers_,
595                     OnTouchHudProjectionToggled(enabled));
596 }
597 
598 #if defined(OS_CHROMEOS)
CreateFirstRunHelper()599 ash::FirstRunHelper* Shell::CreateFirstRunHelper() {
600   return new ash::FirstRunHelperImpl;
601 }
602 
SetCursorCompositingEnabled(bool enabled)603 void Shell::SetCursorCompositingEnabled(bool enabled) {
604   display_controller_->cursor_window_controller()->SetCursorCompositingEnabled(
605       enabled);
606   native_cursor_manager_->SetNativeCursorEnabled(!enabled);
607 }
608 #endif  // defined(OS_CHROMEOS)
609 
DoInitialWorkspaceAnimation()610 void Shell::DoInitialWorkspaceAnimation() {
611   return GetPrimaryRootWindowController()->workspace_controller()->
612       DoInitialAnimation();
613 }
614 
615 ////////////////////////////////////////////////////////////////////////////////
616 // Shell, private:
617 
Shell(ShellDelegate * delegate)618 Shell::Shell(ShellDelegate* delegate)
619     : target_root_window_(NULL),
620       scoped_target_root_window_(NULL),
621       delegate_(delegate),
622       window_positioner_(new WindowPositioner),
623       activation_client_(NULL),
624       accelerometer_controller_(new AccelerometerController()),
625 #if defined(OS_CHROMEOS)
626       display_configurator_(new ui::DisplayConfigurator()),
627 #endif  // defined(OS_CHROMEOS)
628       native_cursor_manager_(new AshNativeCursorManager),
629       cursor_manager_(
630           scoped_ptr< ::wm::NativeCursorManager>(native_cursor_manager_)),
631       simulate_modal_window_open_for_testing_(false),
632       is_touch_hud_projection_enabled_(false) {
633   DCHECK(delegate_.get());
634   gpu_support_.reset(delegate_->CreateGPUSupport());
635   display_manager_.reset(new DisplayManager);
636   display_controller_.reset(new DisplayController);
637 #if defined(OS_CHROMEOS) && defined(USE_X11)
638   user_metrics_recorder_.reset(new UserMetricsRecorder);
639 #endif  // defined(OS_CHROMEOS)
640 
641 #if defined(OS_CHROMEOS)
642   PowerStatus::Initialize();
643 #endif
644 }
645 
~Shell()646 Shell::~Shell() {
647   TRACE_EVENT0("shutdown", "ash::Shell::Destructor");
648 
649   delegate_->PreShutdown();
650 
651   views::FocusManagerFactory::Install(NULL);
652 
653   // Remove the focus from any window. This will prevent overhead and side
654   // effects (e.g. crashes) from changing focus during shutdown.
655   // See bug crbug.com/134502.
656   aura::client::GetFocusClient(GetPrimaryRootWindow())->FocusWindow(NULL);
657 
658   // Please keep in same order as in Init() because it's easy to miss one.
659   if (window_modality_controller_)
660     window_modality_controller_.reset();
661 #if defined(OS_CHROMEOS) && defined(USE_X11)
662   RemovePreTargetHandler(magnifier_key_scroll_handler_.get());
663   magnifier_key_scroll_handler_.reset();
664 
665   RemovePreTargetHandler(speech_feedback_handler_.get());
666   speech_feedback_handler_.reset();
667 #endif
668   RemovePreTargetHandler(user_activity_detector_.get());
669   RemovePreTargetHandler(overlay_filter_.get());
670   RemovePreTargetHandler(input_method_filter_.get());
671   RemovePreTargetHandler(accelerator_filter_.get());
672   RemovePreTargetHandler(event_transformation_handler_.get());
673   RemovePreTargetHandler(toplevel_window_event_handler_.get());
674   RemovePostTargetHandler(toplevel_window_event_handler_.get());
675   RemovePreTargetHandler(system_gesture_filter_.get());
676   RemovePreTargetHandler(keyboard_metrics_filter_.get());
677   RemovePreTargetHandler(mouse_cursor_filter_.get());
678 
679   // TooltipController is deleted with the Shell so removing its references.
680   RemovePreTargetHandler(tooltip_controller_.get());
681 
682   // Destroy maximize mode controller early on since it has some observers which
683   // need to be removed.
684   maximize_mode_controller_->Shutdown();
685   maximize_mode_controller_.reset();
686 
687   // AppList needs to be released before shelf layout manager, which is
688   // destroyed with shelf container in the loop below. However, app list
689   // container is now on top of shelf container and released after it.
690   // TODO(xiyuan): Move it back when app list container is no longer needed.
691   app_list_controller_.reset();
692 
693 #if defined(OS_CHROMEOS)
694   // Destroy the LastWindowClosedLogoutReminder before the
695   // LogoutConfirmationController.
696   last_window_closed_logout_reminder_.reset();
697 
698   // Destroy the LogoutConfirmationController before the SystemTrayDelegate.
699   logout_confirmation_controller_.reset();
700 #endif
701 
702   // Destroy SystemTrayDelegate before destroying the status area(s).
703   system_tray_delegate_->Shutdown();
704   system_tray_delegate_.reset();
705 
706   locale_notification_controller_.reset();
707 
708   // Drag-and-drop must be canceled prior to close all windows.
709   drag_drop_controller_.reset();
710 
711   // Controllers who have WindowObserver added must be deleted
712   // before |display_controller_| is deleted.
713 
714 #if defined(OS_CHROMEOS)
715   // VideoActivityNotifier must be deleted before |video_detector_| is
716   // deleted because it's observing video activity through
717   // VideoDetectorObserver interface.
718   video_activity_notifier_.reset();
719 #endif  // defined(OS_CHROMEOS)
720   video_detector_.reset();
721   high_contrast_controller_.reset();
722 
723   shadow_controller_.reset();
724   resize_shadow_controller_.reset();
725 
726   window_cycle_controller_.reset();
727   window_selector_controller_.reset();
728   mru_window_tracker_.reset();
729 
730   // |shelf_window_watcher_| has a weak pointer to |shelf_Model_|
731   // and has window observers.
732   shelf_window_watcher_.reset();
733 
734   // Destroy all child windows including widgets.
735   display_controller_->CloseChildWindows();
736   display_controller_->CloseNonDesktopDisplay();
737 
738   // Chrome implementation of shelf delegate depends on FocusClient,
739   // so must be deleted before |focus_client_|.
740   shelf_delegate_.reset();
741   focus_client_.reset();
742 
743   // Destroy SystemTrayNotifier after destroying SystemTray as TrayItems
744   // needs to remove observers from it.
745   system_tray_notifier_.reset();
746 
747   // These need a valid Shell instance to clean up properly, so explicitly
748   // delete them before invalidating the instance.
749   // Alphabetical. TODO(oshima): sort.
750   magnification_controller_.reset();
751   partial_magnification_controller_.reset();
752   tooltip_controller_.reset();
753   event_client_.reset();
754   nested_accelerator_controller_.reset();
755   toplevel_window_event_handler_.reset();
756   visibility_controller_.reset();
757   // |shelf_item_delegate_manager_| observes |shelf_model_|. It must be
758   // destroyed before |shelf_model_| is destroyed.
759   shelf_item_delegate_manager_.reset();
760   shelf_model_.reset();
761 
762   power_button_controller_.reset();
763   lock_state_controller_.reset();
764 
765 #if defined(OS_CHROMEOS)
766   resolution_notification_controller_.reset();
767 #endif
768   desktop_background_controller_.reset();
769   mouse_cursor_filter_.reset();
770 
771 #if defined(OS_CHROMEOS) && defined(USE_X11)
772   touch_transformer_controller_.reset();
773 #endif  // defined(OS_CHROMEOS) && defined(USE_X11)
774 
775   // This also deletes all RootWindows. Note that we invoke Shutdown() on
776   // DisplayController before resetting |display_controller_|, since destruction
777   // of its owned RootWindowControllers relies on the value.
778   display_manager_->CreateScreenForShutdown();
779   display_controller_->Shutdown();
780   display_controller_.reset();
781   screen_position_controller_.reset();
782   accessibility_delegate_.reset();
783   new_window_delegate_.reset();
784   media_delegate_.reset();
785 
786   keyboard::KeyboardController::ResetInstance(NULL);
787 
788 #if defined(OS_CHROMEOS)
789   if (display_change_observer_)
790     display_configurator_->RemoveObserver(display_change_observer_.get());
791   if (display_configurator_animation_)
792     display_configurator_->RemoveObserver(
793         display_configurator_animation_.get());
794   if (display_error_observer_)
795     display_configurator_->RemoveObserver(display_error_observer_.get());
796   if (projecting_observer_)
797     display_configurator_->RemoveObserver(projecting_observer_.get());
798   display_change_observer_.reset();
799 #endif  // defined(OS_CHROMEOS)
800 
801 #if defined(OS_CHROMEOS)
802   PowerStatus::Shutdown();
803 #endif
804 
805   DCHECK(instance_ == this);
806   instance_ = NULL;
807 }
808 
Init(const ShellInitParams & init_params)809 void Shell::Init(const ShellInitParams& init_params) {
810   delegate_->PreInit();
811   if (keyboard::IsKeyboardUsabilityExperimentEnabled()) {
812     display_manager_->SetSecondDisplayMode(DisplayManager::VIRTUAL_KEYBOARD);
813   }
814   bool display_initialized = display_manager_->InitFromCommandLine();
815 #if defined(OS_CHROMEOS)
816   display_configurator_->Init(!gpu_support_->IsPanelFittingDisabled());
817   display_configurator_animation_.reset(new DisplayConfiguratorAnimation());
818   display_configurator_->AddObserver(display_configurator_animation_.get());
819 
820   projecting_observer_.reset(new ProjectingObserver());
821   display_configurator_->AddObserver(projecting_observer_.get());
822 
823   if (!display_initialized && base::SysInfo::IsRunningOnChromeOS()) {
824     display_change_observer_.reset(new DisplayChangeObserver);
825     // Register |display_change_observer_| first so that the rest of
826     // observer gets invoked after the root windows are configured.
827     display_configurator_->AddObserver(display_change_observer_.get());
828     display_error_observer_.reset(new DisplayErrorObserver());
829     display_configurator_->AddObserver(display_error_observer_.get());
830     display_configurator_->set_state_controller(display_change_observer_.get());
831     display_configurator_->set_mirroring_controller(display_manager_.get());
832     display_configurator_->ForceInitialConfigure(
833         delegate_->IsFirstRunAfterBoot() ? kChromeOsBootColor : 0);
834     display_initialized = true;
835   }
836 #endif  // defined(OS_CHROMEOS)
837   if (!display_initialized)
838     display_manager_->InitDefaultDisplay();
839 
840   // Install the custom factory first so that views::FocusManagers for Tray,
841   // Shelf, and WallPaper could be created by the factory.
842   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
843 
844   aura::Env::CreateInstance(true);
845   aura::Env::GetInstance()->set_context_factory(init_params.context_factory);
846 
847   // The WindowModalityController needs to be at the front of the input event
848   // pretarget handler list to ensure that it processes input events when modal
849   // windows are active.
850   window_modality_controller_.reset(
851       new ::wm::WindowModalityController(this));
852 
853   env_filter_.reset(new ::wm::CompoundEventFilter);
854   AddPreTargetHandler(env_filter_.get());
855 
856   ::wm::FocusController* focus_controller =
857       new ::wm::FocusController(new wm::AshFocusRules);
858   focus_client_.reset(focus_controller);
859   activation_client_ = focus_controller;
860   activation_client_->AddObserver(this);
861   focus_cycler_.reset(new FocusCycler());
862 
863   screen_position_controller_.reset(new ScreenPositionController);
864 
865   display_controller_->Start();
866   display_controller_->CreatePrimaryHost(
867       ShellInitParamsToAshWindowTreeHostInitParams(init_params));
868   aura::Window* root_window = display_controller_->GetPrimaryRootWindow();
869   target_root_window_ = root_window;
870 
871 #if defined(OS_CHROMEOS)
872   resolution_notification_controller_.reset(
873       new ResolutionNotificationController);
874 #endif
875 
876   cursor_manager_.SetDisplay(GetScreen()->GetPrimaryDisplay());
877 
878   nested_accelerator_controller_.reset(
879       new ::wm::NestedAcceleratorController(new NestedAcceleratorDelegate));
880   accelerator_controller_.reset(new AcceleratorController);
881   maximize_mode_controller_.reset(new MaximizeModeController());
882 
883 #if defined(OS_CHROMEOS) && defined(USE_X11)
884   magnifier_key_scroll_handler_ = MagnifierKeyScroller::CreateHandler().Pass();
885   AddPreTargetHandler(magnifier_key_scroll_handler_.get());
886   speech_feedback_handler_ = SpokenFeedbackToggler::CreateHandler().Pass();
887   AddPreTargetHandler(speech_feedback_handler_.get());
888 #endif
889 
890   // The order in which event filters are added is significant.
891 
892 #if defined(OS_CHROMEOS)
893   // The StickyKeysController also rewrites events and must be added
894   // before observers, but after the EventRewriterEventFilter.
895   sticky_keys_controller_.reset(new StickyKeysController);
896   AddPreTargetHandler(sticky_keys_controller_.get());
897 #endif
898 
899   // wm::UserActivityDetector passes events to observers, so let them get
900   // rewritten first.
901   user_activity_detector_.reset(new ::wm::UserActivityDetector);
902   AddPreTargetHandler(user_activity_detector_.get());
903 
904   overlay_filter_.reset(new OverlayEventFilter);
905   AddPreTargetHandler(overlay_filter_.get());
906   AddShellObserver(overlay_filter_.get());
907 
908   input_method_filter_.reset(new ::wm::InputMethodEventFilter(
909       root_window->GetHost()->GetAcceleratedWidget()));
910   AddPreTargetHandler(input_method_filter_.get());
911 
912   accelerator_filter_.reset(new ::wm::AcceleratorFilter(
913       scoped_ptr< ::wm::AcceleratorDelegate>(new AcceleratorDelegate).Pass()));
914   AddPreTargetHandler(accelerator_filter_.get());
915 
916   event_transformation_handler_.reset(new EventTransformationHandler);
917   AddPreTargetHandler(event_transformation_handler_.get());
918 
919   toplevel_window_event_handler_.reset(new ToplevelWindowEventHandler);
920 
921   system_gesture_filter_.reset(new SystemGestureEventFilter);
922   AddPreTargetHandler(system_gesture_filter_.get());
923 
924   keyboard_metrics_filter_.reset(new KeyboardUMAEventFilter);
925   AddPreTargetHandler(keyboard_metrics_filter_.get());
926 
927   // The keyboard system must be initialized before the RootWindowController is
928   // created.
929 #if defined(OS_CHROMEOS)
930     keyboard::InitializeKeyboard();
931 #endif
932 
933   lock_state_controller_.reset(new LockStateController);
934   power_button_controller_.reset(new PowerButtonController(
935       lock_state_controller_.get()));
936 #if defined(OS_CHROMEOS)
937   // Pass the initial display state to PowerButtonController.
938   power_button_controller_->OnDisplayModeChanged(
939       display_configurator_->cached_displays());
940 #endif
941   AddShellObserver(lock_state_controller_.get());
942 
943   drag_drop_controller_.reset(new DragDropController);
944   mouse_cursor_filter_.reset(new MouseCursorEventFilter());
945   PrependPreTargetHandler(mouse_cursor_filter_.get());
946 
947   // Create Controllers that may need root window.
948   // TODO(oshima): Move as many controllers before creating
949   // RootWindowController as possible.
950   visibility_controller_.reset(new AshVisibilityController);
951 
952   magnification_controller_.reset(
953       MagnificationController::CreateInstance());
954   mru_window_tracker_.reset(new MruWindowTracker(activation_client_));
955 
956   partial_magnification_controller_.reset(
957       new PartialMagnificationController());
958 
959   autoclick_controller_.reset(AutoclickController::CreateInstance());
960 
961   high_contrast_controller_.reset(new HighContrastController);
962   video_detector_.reset(new VideoDetector);
963   window_selector_controller_.reset(new WindowSelectorController());
964   window_cycle_controller_.reset(new WindowCycleController());
965 
966   tooltip_controller_.reset(
967       new views::corewm::TooltipController(
968           scoped_ptr<views::corewm::Tooltip>(
969               new views::corewm::TooltipAura(gfx::SCREEN_TYPE_ALTERNATE))));
970   AddPreTargetHandler(tooltip_controller_.get());
971 
972   event_client_.reset(new EventClientImpl);
973 
974   // This controller needs to be set before SetupManagedWindowMode.
975   desktop_background_controller_.reset(new DesktopBackgroundController());
976   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
977 
978   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
979   accessibility_delegate_.reset(delegate_->CreateAccessibilityDelegate());
980   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
981   media_delegate_.reset(delegate_->CreateMediaDelegate());
982 
983   resize_shadow_controller_.reset(new ResizeShadowController());
984   shadow_controller_.reset(
985       new ::wm::ShadowController(activation_client_));
986 
987   // Create system_tray_notifier_ before the delegate.
988   system_tray_notifier_.reset(new ash::SystemTrayNotifier());
989 
990   // Initialize system_tray_delegate_ before initializing StatusAreaWidget.
991   system_tray_delegate_.reset(delegate()->CreateSystemTrayDelegate());
992   DCHECK(system_tray_delegate_.get());
993 
994   locale_notification_controller_.reset(new LocaleNotificationController);
995 
996   // Initialize system_tray_delegate_ after StatusAreaWidget is created.
997   system_tray_delegate_->Initialize();
998 
999 #if defined(OS_CHROMEOS)
1000   // Create the LogoutConfirmationController after the SystemTrayDelegate.
1001   logout_confirmation_controller_.reset(new LogoutConfirmationController(
1002       base::Bind(&SystemTrayDelegate::SignOut,
1003                  base::Unretained(system_tray_delegate_.get()))));
1004 #endif
1005 
1006 #if defined(OS_CHROMEOS) && defined(USE_X11)
1007   // Create TouchTransformerController before DisplayController::InitDisplays()
1008   // since TouchTransformerController listens on
1009   // DisplayController::Observer::OnDisplaysInitialized().
1010   touch_transformer_controller_.reset(new TouchTransformerController());
1011 #endif  // defined(OS_CHROMEOS) && defined(USE_X11)
1012 
1013   display_controller_->InitDisplays();
1014 
1015   // It needs to be created after RootWindowController has been created
1016   // (which calls OnWindowResized has been called, otherwise the
1017   // widget will not paint when restoring after a browser crash.  Also it needs
1018   // to be created after InitSecondaryDisplays() to initialize the wallpapers in
1019   // the correct size.
1020   user_wallpaper_delegate_->InitializeWallpaper();
1021 
1022   if (initially_hide_cursor_)
1023     cursor_manager_.HideCursor();
1024   cursor_manager_.SetCursor(ui::kCursorPointer);
1025 
1026 #if defined(OS_CHROMEOS)
1027   // Set accelerator controller delegates.
1028   accelerator_controller_->SetBrightnessControlDelegate(
1029       scoped_ptr<ash::BrightnessControlDelegate>(
1030           new ash::system::BrightnessControllerChromeos).Pass());
1031 
1032   power_event_observer_.reset(new PowerEventObserver());
1033   user_activity_notifier_.reset(
1034       new ui::UserActivityPowerManagerNotifier(user_activity_detector_.get()));
1035   video_activity_notifier_.reset(
1036       new VideoActivityNotifier(video_detector_.get()));
1037   bluetooth_notification_controller_.reset(new BluetoothNotificationController);
1038   last_window_closed_logout_reminder_.reset(new LastWindowClosedLogoutReminder);
1039 #endif
1040 
1041   weak_display_manager_factory_.reset(
1042       new base::WeakPtrFactory<DisplayManager>(display_manager_.get()));
1043   // The compositor thread and main message loop have to be running in
1044   // order to create mirror window. Run it after the main message loop
1045   // is started.
1046   base::MessageLoopForUI::current()->PostTask(
1047       FROM_HERE,
1048       base::Bind(&DisplayManager::CreateMirrorWindowIfAny,
1049                  weak_display_manager_factory_->GetWeakPtr()));
1050 }
1051 
InitKeyboard()1052 void Shell::InitKeyboard() {
1053   if (keyboard::IsKeyboardEnabled()) {
1054     if (keyboard::KeyboardController::GetInstance()) {
1055       RootWindowControllerList controllers = GetAllRootWindowControllers();
1056       for (RootWindowControllerList::iterator iter = controllers.begin();
1057            iter != controllers.end(); ++iter) {
1058         (*iter)->DeactivateKeyboard(
1059             keyboard::KeyboardController::GetInstance());
1060       }
1061     }
1062     keyboard::KeyboardControllerProxy* proxy =
1063         delegate_->CreateKeyboardControllerProxy();
1064     keyboard::KeyboardController::ResetInstance(
1065         new keyboard::KeyboardController(proxy));
1066   }
1067 }
1068 
InitRootWindow(aura::Window * root_window)1069 void Shell::InitRootWindow(aura::Window* root_window) {
1070   DCHECK(activation_client_);
1071   DCHECK(visibility_controller_.get());
1072   DCHECK(drag_drop_controller_.get());
1073 
1074   aura::client::SetFocusClient(root_window, focus_client_.get());
1075   input_method_filter_->SetInputMethodPropertyInRootWindow(root_window);
1076   aura::client::SetActivationClient(root_window, activation_client_);
1077   ::wm::FocusController* focus_controller =
1078       static_cast< ::wm::FocusController*>(activation_client_);
1079   root_window->AddPreTargetHandler(focus_controller);
1080   aura::client::SetVisibilityClient(root_window, visibility_controller_.get());
1081   aura::client::SetDragDropClient(root_window, drag_drop_controller_.get());
1082   aura::client::SetScreenPositionClient(root_window,
1083                                         screen_position_controller_.get());
1084   aura::client::SetCursorClient(root_window, &cursor_manager_);
1085   aura::client::SetTooltipClient(root_window, tooltip_controller_.get());
1086   aura::client::SetEventClient(root_window, event_client_.get());
1087 
1088   aura::client::SetWindowMoveClient(root_window,
1089       toplevel_window_event_handler_.get());
1090   root_window->AddPreTargetHandler(toplevel_window_event_handler_.get());
1091   root_window->AddPostTargetHandler(toplevel_window_event_handler_.get());
1092 
1093   if (nested_accelerator_controller_) {
1094     aura::client::SetDispatcherClient(root_window,
1095                                       nested_accelerator_controller_.get());
1096   }
1097 }
1098 
CanWindowReceiveEvents(aura::Window * window)1099 bool Shell::CanWindowReceiveEvents(aura::Window* window) {
1100   RootWindowControllerList controllers = GetAllRootWindowControllers();
1101   for (RootWindowControllerList::iterator iter = controllers.begin();
1102        iter != controllers.end(); ++iter) {
1103     SystemModalContainerLayoutManager* layout_manager =
1104         (*iter)->GetSystemModalLayoutManager(window);
1105     if (layout_manager && layout_manager->CanWindowReceiveEvents(window))
1106       return true;
1107     // Allow events to fall through to the virtual keyboard even if displaying
1108     // a system modal dialog.
1109     if ((*iter)->IsVirtualKeyboardWindow(window))
1110       return true;
1111   }
1112 
1113   return false;
1114 }
1115 
1116 ////////////////////////////////////////////////////////////////////////////////
1117 // Shell, ui::EventTarget overrides:
1118 
CanAcceptEvent(const ui::Event & event)1119 bool Shell::CanAcceptEvent(const ui::Event& event) {
1120   return true;
1121 }
1122 
GetParentTarget()1123 ui::EventTarget* Shell::GetParentTarget() {
1124   return aura::Env::GetInstance();
1125 }
1126 
GetChildIterator() const1127 scoped_ptr<ui::EventTargetIterator> Shell::GetChildIterator() const {
1128   return scoped_ptr<ui::EventTargetIterator>();
1129 }
1130 
GetEventTargeter()1131 ui::EventTargeter* Shell::GetEventTargeter() {
1132   NOTREACHED();
1133   return NULL;
1134 }
1135 
OnEvent(ui::Event * event)1136 void Shell::OnEvent(ui::Event* event) {
1137 }
1138 
1139 ////////////////////////////////////////////////////////////////////////////////
1140 // Shell, aura::client::ActivationChangeObserver implementation:
1141 
OnWindowActivated(aura::Window * gained_active,aura::Window * lost_active)1142 void Shell::OnWindowActivated(aura::Window* gained_active,
1143                               aura::Window* lost_active) {
1144   if (gained_active)
1145     target_root_window_ = gained_active->GetRootWindow();
1146 }
1147 
1148 }  // namespace ash
1149