blob: 18ee20758cf9de47ffac444130540f33a35e104f [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/shell.h"
#include <algorithm>
#include <memory>
#include <string>
#include <utility>
#include "ash/accelerators/accelerator_controller_impl.h"
#include "ash/accelerators/ash_focus_manager_factory.h"
#include "ash/accelerators/magnifier_key_scroller.h"
#include "ash/accelerators/pre_target_accelerator_handler.h"
#include "ash/accelerators/spoken_feedback_toggler.h"
#include "ash/accelerometer/accelerometer_reader.h"
#include "ash/accessibility/accessibility_controller.h"
#include "ash/accessibility/accessibility_delegate.h"
#include "ash/accessibility/accessibility_focus_ring_controller.h"
#include "ash/accessibility/key_accessibility_enabler.h"
#include "ash/app_list/app_list_controller_impl.h"
#include "ash/assistant/assistant_controller.h"
#include "ash/autoclick/autoclick_controller.h"
#include "ash/dbus/ash_dbus_helper.h"
#include "ash/dbus/ash_dbus_services.h"
#include "ash/detachable_base/detachable_base_handler.h"
#include "ash/detachable_base/detachable_base_notification_controller.h"
#include "ash/display/cros_display_config.h"
#include "ash/display/cursor_window_controller.h"
#include "ash/display/display_color_manager.h"
#include "ash/display/display_configuration_controller.h"
#include "ash/display/display_configuration_observer.h"
#include "ash/display/display_error_observer.h"
#include "ash/display/display_output_protection.h"
#include "ash/display/display_prefs.h"
#include "ash/display/display_shutdown_observer.h"
#include "ash/display/event_transformation_handler.h"
#include "ash/display/mouse_cursor_event_filter.h"
#include "ash/display/persistent_window_controller.h"
#include "ash/display/projecting_observer.h"
#include "ash/display/resolution_notification_controller.h"
#include "ash/display/screen_ash.h"
#include "ash/display/screen_orientation_controller.h"
#include "ash/display/screen_position_controller.h"
#include "ash/display/window_tree_host_manager.h"
#include "ash/drag_drop/drag_drop_controller.h"
#include "ash/events/event_rewriter_controller.h"
#include "ash/first_run/first_run_helper.h"
#include "ash/focus_cycler.h"
#include "ash/frame/non_client_frame_view_ash.h"
#include "ash/frame/snap_controller_impl.h"
#include "ash/high_contrast/high_contrast_controller.h"
#include "ash/highlighter/highlighter_controller.h"
#include "ash/home_screen/home_screen_controller.h"
#include "ash/host/ash_window_tree_host_init_params.h"
#include "ash/ime/ime_controller.h"
#include "ash/ime/ime_engine_factory_registry.h"
#include "ash/keyboard/ash_keyboard_controller.h"
#include "ash/keyboard/ui/keyboard_ui_factory.h"
#include "ash/kiosk_next/kiosk_next_shell_controller.h"
#include "ash/laser/laser_pointer_controller.h"
#include "ash/login/login_screen_controller.h"
#include "ash/login_status.h"
#include "ash/magnifier/docked_magnifier_controller.h"
#include "ash/magnifier/magnification_controller.h"
#include "ash/magnifier/partial_magnification_controller.h"
#include "ash/media/media_controller.h"
#include "ash/media/media_notification_controller.h"
#include "ash/metrics/time_to_first_present_recorder.h"
#include "ash/multi_device_setup/multi_device_notification_presenter.h"
#include "ash/new_window_controller.h"
#include "ash/note_taking_controller.h"
#include "ash/policy/policy_recommendation_restorer.h"
#include "ash/public/cpp/ash_constants.h"
#include "ash/public/cpp/ash_features.h"
#include "ash/public/cpp/ash_prefs.h"
#include "ash/public/cpp/ash_switches.h"
#include "ash/public/cpp/shelf_model.h"
#include "ash/public/cpp/shell_window_ids.h"
#include "ash/root_window_controller.h"
#include "ash/screenshot_delegate.h"
#include "ash/session/session_controller_impl.h"
#include "ash/shelf/shelf.h"
#include "ash/shelf/shelf_controller.h"
#include "ash/shelf/shelf_window_watcher.h"
#include "ash/shell_delegate.h"
#include "ash/shell_init_params.h"
#include "ash/shell_observer.h"
#include "ash/shell_state.h"
#include "ash/shutdown_controller.h"
#include "ash/sticky_keys/sticky_keys_controller.h"
#include "ash/system/audio/display_speaker_controller.h"
#include "ash/system/bluetooth/bluetooth_notification_controller.h"
#include "ash/system/bluetooth/bluetooth_power_controller.h"
#include "ash/system/bluetooth/tray_bluetooth_helper_experimental.h"
#include "ash/system/bluetooth/tray_bluetooth_helper_legacy.h"
#include "ash/system/brightness/brightness_controller_chromeos.h"
#include "ash/system/brightness_control_delegate.h"
#include "ash/system/caps_lock_notification_controller.h"
#include "ash/system/keyboard_brightness/keyboard_brightness_controller.h"
#include "ash/system/keyboard_brightness_control_delegate.h"
#include "ash/system/locale/locale_update_controller.h"
#include "ash/system/message_center/message_center_controller.h"
#include "ash/system/model/system_tray_model.h"
#include "ash/system/model/virtual_keyboard_model.h"
#include "ash/system/network/sms_observer.h"
#include "ash/system/network/vpn_list.h"
#include "ash/system/night_light/night_light_controller.h"
#include "ash/system/power/backlights_forced_off_setter.h"
#include "ash/system/power/notification_reporter.h"
#include "ash/system/power/peripheral_battery_notifier.h"
#include "ash/system/power/power_button_controller.h"
#include "ash/system/power/power_event_observer.h"
#include "ash/system/power/power_prefs.h"
#include "ash/system/power/power_status.h"
#include "ash/system/power/video_activity_notifier.h"
#include "ash/system/screen_layout_observer.h"
#include "ash/system/screen_security/screen_switch_check_controller.h"
#include "ash/system/session/logout_confirmation_controller.h"
#include "ash/system/status_area_widget.h"
#include "ash/system/system_notification_controller.h"
#include "ash/system/toast/toast_manager.h"
#include "ash/system/tray/system_tray_notifier.h"
#include "ash/touch/ash_touch_transform_controller.h"
#include "ash/touch/touch_devices_controller.h"
#include "ash/tray_action/tray_action.h"
#include "ash/utility/screenshot_controller.h"
#include "ash/voice_interaction/voice_interaction_controller.h"
#include "ash/wallpaper/wallpaper_controller.h"
#include "ash/wayland/wayland_server_controller.h"
#include "ash/wm/ash_focus_rules.h"
#include "ash/wm/container_finder.h"
#include "ash/wm/cursor_manager_chromeos.h"
#include "ash/wm/desks/desks_controller.h"
#include "ash/wm/event_client_impl.h"
#include "ash/wm/immersive_context_ash.h"
#include "ash/wm/lock_state_controller.h"
#include "ash/wm/mru_window_tracker.h"
#include "ash/wm/native_cursor_manager_ash.h"
#include "ash/wm/overlay_event_filter.h"
#include "ash/wm/overview/overview_controller.h"
#include "ash/wm/resize_shadow_controller.h"
#include "ash/wm/root_window_finder.h"
#include "ash/wm/screen_pinning_controller.h"
#include "ash/wm/splitview/split_view_controller.h"
#include "ash/wm/system_gesture_event_filter.h"
#include "ash/wm/system_modal_container_event_filter.h"
#include "ash/wm/system_modal_container_layout_manager.h"
#include "ash/wm/tablet_mode/tablet_mode_controller.h"
#include "ash/wm/tablet_mode/tablet_mode_window_manager.h"
#include "ash/wm/toplevel_window_event_handler.h"
#include "ash/wm/video_detector.h"
#include "ash/wm/window_animations.h"
#include "ash/wm/window_cycle_controller.h"
#include "ash/wm/window_positioner.h"
#include "ash/wm/window_properties.h"
#include "ash/wm/window_util.h"
#include "ash/wm/wm_shadow_controller_delegate.h"
#include "ash/wm/workspace_controller.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/system/sys_info.h"
#include "base/task/post_task.h"
#include "base/task/task_traits.h"
#include "base/trace_event/trace_event.h"
#include "chromeos/constants/chromeos_features.h"
#include "chromeos/dbus/initialize_dbus_client.h"
#include "chromeos/dbus/power/power_policy_controller.h"
#include "chromeos/system/devicemode.h"
#include "components/exo/file_helper.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
#include "components/viz/host/host_frame_sink_manager.h"
#include "dbus/bus.h"
#include "services/service_manager/public/cpp/connector.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/env.h"
#include "ui/aura/layout_manager.h"
#include "ui/aura/window.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/base/ui_base_features.h"
#include "ui/base/ui_base_switches.h"
#include "ui/base/user_activity/user_activity_detector.h"
#include "ui/chromeos/user_activity_power_manager_notifier.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_animator.h"
#include "ui/display/display.h"
#include "ui/display/manager/default_touch_transform_setter.h"
#include "ui/display/manager/display_change_observer.h"
#include "ui/display/manager/display_configurator.h"
#include "ui/display/manager/display_manager.h"
#include "ui/display/manager/touch_transform_setter.h"
#include "ui/display/screen.h"
#include "ui/display/types/native_display_delegate.h"
#include "ui/events/event_target_iterator.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/ozone/public/ozone_platform.h"
#include "ui/views/corewm/tooltip_aura.h"
#include "ui/views/corewm/tooltip_controller.h"
#include "ui/views/focus/focus_manager_factory.h"
#include "ui/views/widget/native_widget_aura.h"
#include "ui/views/widget/widget.h"
#include "ui/wm/core/accelerator_filter.h"
#include "ui/wm/core/compound_event_filter.h"
#include "ui/wm/core/focus_controller.h"
#include "ui/wm/core/shadow_controller.h"
#include "ui/wm/core/visibility_controller.h"
#include "ui/wm/core/window_modality_controller.h"
namespace ash {
namespace {
using aura::Window;
using views::Widget;
// A Corewm VisibilityController subclass that calls the Ash animation routine
// so we can pick up our extended animations. See ash/wm/window_animations.h.
class AshVisibilityController : public ::wm::VisibilityController {
public:
AshVisibilityController() = default;
~AshVisibilityController() override = default;
private:
// Overridden from ::wm::VisibilityController:
bool CallAnimateOnChildWindowVisibilityChanged(aura::Window* window,
bool visible) override {
return AnimateOnChildWindowVisibilityChanged(window, visible);
}
DISALLOW_COPY_AND_ASSIGN(AshVisibilityController);
};
} // namespace
// static
Shell* Shell::instance_ = nullptr;
////////////////////////////////////////////////////////////////////////////////
// Shell, public:
// static
Shell* Shell::CreateInstance(ShellInitParams init_params) {
CHECK(!instance_);
instance_ = new Shell(std::move(init_params.delegate), init_params.connector);
instance_->Init(init_params.context_factory,
init_params.context_factory_private, init_params.local_state,
std::move(init_params.keyboard_ui_factory),
init_params.dbus_bus);
return instance_;
}
// static
Shell* Shell::Get() {
CHECK(instance_);
return instance_;
}
// static
bool Shell::HasInstance() {
return !!instance_;
}
// static
void Shell::DeleteInstance() {
delete instance_;
}
// static
RootWindowController* Shell::GetPrimaryRootWindowController() {
CHECK(HasInstance());
return RootWindowController::ForWindow(GetPrimaryRootWindow());
}
// static
Shell::RootWindowControllerList Shell::GetAllRootWindowControllers() {
CHECK(HasInstance());
RootWindowControllerList root_window_controllers;
for (aura::Window* root : GetAllRootWindows())
root_window_controllers.push_back(RootWindowController::ForWindow(root));
return root_window_controllers;
}
// static
RootWindowController* Shell::GetRootWindowControllerWithDisplayId(
int64_t display_id) {
CHECK(HasInstance());
aura::Window* root = GetRootWindowForDisplayId(display_id);
return root ? RootWindowController::ForWindow(root) : nullptr;
}
// static
aura::Window* Shell::GetRootWindowForDisplayId(int64_t display_id) {
CHECK(HasInstance());
return instance_->window_tree_host_manager_->GetRootWindowForDisplayId(
display_id);
}
// static
aura::Window* Shell::GetPrimaryRootWindow() {
CHECK(HasInstance());
return instance_->window_tree_host_manager_->GetPrimaryRootWindow();
}
// static
aura::Window* Shell::GetRootWindowForNewWindows() {
return Shell::Get()->shell_state_->GetRootWindowForNewWindows();
}
// static
aura::Window::Windows Shell::GetAllRootWindows() {
CHECK(HasInstance());
return instance_->window_tree_host_manager_->GetAllRootWindows();
}
// static
aura::Window* Shell::GetContainer(aura::Window* root_window, int container_id) {
return root_window->GetChildById(container_id);
}
// static
const aura::Window* Shell::GetContainer(const aura::Window* root_window,
int container_id) {
return root_window->GetChildById(container_id);
}
// static
int Shell::GetOpenSystemModalWindowContainerId() {
// The test boolean is not static to avoid leaking state between tests.
if (Get()->simulate_modal_window_open_for_test_)
return kShellWindowId_SystemModalContainer;
// Traverse all system modal containers, and find its direct child window
// with "SystemModal" setting, and visible.
for (aura::Window* root : Shell::GetAllRootWindows()) {
for (int modal_window_id : kSystemModalContainerIds) {
aura::Window* system_modal = root->GetChildById(modal_window_id);
if (!system_modal)
continue;
for (const aura::Window* child : system_modal->children()) {
if (child->GetProperty(aura::client::kModalKey) ==
ui::MODAL_TYPE_SYSTEM &&
child->layer()->GetTargetVisibility()) {
return modal_window_id;
}
}
}
}
return -1;
}
// static
bool Shell::IsSystemModalWindowOpen() {
return GetOpenSystemModalWindowContainerId() >= 0;
}
display::DisplayConfigurator* Shell::display_configurator() {
return display_manager_->configurator();
}
void Shell::InitWaylandServer(std::unique_ptr<exo::FileHelper> file_helper) {
wayland_server_controller_ = WaylandServerController::CreateIfNecessary(
std::move(file_helper), aura_env_);
if (wayland_server_controller_) {
system_tray_model()
->virtual_keyboard()
->SetInputMethodSurfaceManagerObserver(
wayland_server_controller_->arc_input_method_surface_manager());
}
}
void Shell::DestroyWaylandServer() {
if (wayland_server_controller_) {
system_tray_model()
->virtual_keyboard()
->RemoveInputMethodSurfaceManagerObserver(
wayland_server_controller_->arc_input_method_surface_manager());
}
wayland_server_controller_.reset();
}
views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
views::Widget* widget) {
// Use translucent-style window frames for dialogs.
return new NonClientFrameViewAsh(widget);
}
void Shell::SetDisplayWorkAreaInsets(Window* contains,
const gfx::Insets& insets) {
window_tree_host_manager_->UpdateWorkAreaOfDisplayNearestWindow(contains,
insets);
}
void Shell::OnCastingSessionStartedOrStopped(bool started) {
for (auto& observer : shell_observers_)
observer.OnCastingSessionStartedOrStopped(started);
}
void Shell::OnRootWindowAdded(aura::Window* root_window) {
for (auto& observer : shell_observers_)
observer.OnRootWindowAdded(root_window);
}
void Shell::OnDictationStarted() {
for (auto& observer : shell_observers_)
observer.OnDictationStarted();
}
void Shell::OnDictationEnded() {
for (auto& observer : shell_observers_)
observer.OnDictationEnded();
}
bool Shell::ShouldSaveDisplaySettings() {
return !(
screen_orientation_controller_->ignore_display_configuration_updates() ||
resolution_notification_controller_->DoesNotificationTimeout() ||
!display_configuration_observer_->save_preference());
}
DockedMagnifierController* Shell::docked_magnifier_controller() {
return docked_magnifier_controller_.get();
}
NightLightController* Shell::night_light_controller() {
return night_light_controller_.get();
}
ShelfModel* Shell::shelf_model() {
return shelf_controller_->model();
}
::wm::ActivationClient* Shell::activation_client() {
return focus_controller_.get();
}
void Shell::UpdateShelfVisibility() {
for (aura::Window* root : GetAllRootWindows())
Shelf::ForWindow(root)->UpdateVisibilityState();
}
bool Shell::HasPrimaryStatusArea() {
return !!GetPrimaryRootWindowController()->GetStatusAreaWidget();
}
void Shell::SetLargeCursorSizeInDip(int large_cursor_size_in_dip) {
window_tree_host_manager_->cursor_window_controller()
->SetLargeCursorSizeInDip(large_cursor_size_in_dip);
}
void Shell::UpdateCursorCompositingEnabled() {
SetCursorCompositingEnabled(
window_tree_host_manager_->cursor_window_controller()
->ShouldEnableCursorCompositing());
}
void Shell::SetCursorCompositingEnabled(bool enabled) {
CursorWindowController* cursor_window_controller =
window_tree_host_manager_->cursor_window_controller();
if (cursor_window_controller->is_cursor_compositing_enabled() == enabled)
return;
cursor_window_controller->SetCursorCompositingEnabled(enabled);
native_cursor_manager_->SetNativeCursorEnabled(!enabled);
}
void Shell::DoInitialWorkspaceAnimation() {
// Uses the active desk's workspace.
auto* workspace = GetActiveWorkspaceController(GetPrimaryRootWindow());
DCHECK(workspace);
workspace->DoInitialAnimation();
}
void Shell::ShowContextMenu(const gfx::Point& location_in_screen,
ui::MenuSourceType source_type) {
// Bail with no active user session, in the lock screen, or in app/kiosk mode.
if (session_controller_->NumberOfLoggedInUsers() < 1 ||
session_controller_->IsScreenLocked() ||
session_controller_->IsRunningInAppMode()) {
return;
}
aura::Window* root = wm::GetRootWindowAt(location_in_screen);
RootWindowController::ForWindow(root)->ShowContextMenu(location_in_screen,
source_type);
}
void Shell::RemoveAppListController() {
// AppListController must no longer be the HomeScreenController delegate.
DCHECK_NE(home_screen_controller_->delegate(), app_list_controller_.get());
app_list_controller_.reset();
}
void Shell::AddShellObserver(ShellObserver* observer) {
shell_observers_.AddObserver(observer);
}
void Shell::RemoveShellObserver(ShellObserver* observer) {
shell_observers_.RemoveObserver(observer);
}
void Shell::UpdateAfterLoginStatusChange(LoginStatus status) {
for (auto* root_window_controller : GetAllRootWindowControllers())
root_window_controller->UpdateAfterLoginStatusChange(status);
}
void Shell::NotifySplitViewModeStarting() {
for (auto& observer : shell_observers_)
observer.OnSplitViewModeStarting();
}
void Shell::NotifySplitViewModeStarted() {
for (auto& observer : shell_observers_)
observer.OnSplitViewModeStarted();
}
void Shell::NotifySplitViewModeEnded() {
for (auto& observer : shell_observers_)
observer.OnSplitViewModeEnded();
}
void Shell::NotifyFullscreenStateChanged(bool is_fullscreen,
aura::Window* container) {
for (auto& observer : shell_observers_)
observer.OnFullscreenStateChanged(is_fullscreen, container);
}
void Shell::NotifyPinnedStateChanged(aura::Window* pinned_window) {
for (auto& observer : shell_observers_)
observer.OnPinnedStateChanged(pinned_window);
}
void Shell::NotifyUserWorkAreaInsetsChanged(aura::Window* root_window) {
for (auto& observer : shell_observers_)
observer.OnUserWorkAreaInsetsChanged(root_window);
}
void Shell::NotifyShelfAlignmentChanged(aura::Window* root_window) {
for (auto& observer : shell_observers_)
observer.OnShelfAlignmentChanged(root_window);
}
void Shell::NotifyShelfAutoHideBehaviorChanged(aura::Window* root_window) {
for (auto& observer : shell_observers_)
observer.OnShelfAutoHideBehaviorChanged(root_window);
}
////////////////////////////////////////////////////////////////////////////////
// Shell, private:
Shell::Shell(std::unique_ptr<ShellDelegate> shell_delegate,
service_manager::Connector* connector)
: owned_aura_env_(::features::IsSingleProcessMash()
? aura::Env::CreateLocalInstanceForInProcess()
: nullptr),
aura_env_(owned_aura_env_.get() ? owned_aura_env_.get()
: aura::Env::GetInstance()),
brightness_control_delegate_(
std::make_unique<system::BrightnessControllerChromeos>()),
connector_(connector),
first_run_helper_(std::make_unique<FirstRunHelper>()),
focus_cycler_(std::make_unique<FocusCycler>()),
ime_controller_(std::make_unique<ImeController>()),
ime_engine_factory_registry_(
std::make_unique<ImeEngineFactoryRegistry>()),
immersive_context_(std::make_unique<ImmersiveContextAsh>()),
keyboard_brightness_control_delegate_(
std::make_unique<KeyboardBrightnessController>()),
locale_update_controller_(std::make_unique<LocaleUpdateController>()),
media_controller_(std::make_unique<MediaController>(connector)),
new_window_controller_(std::make_unique<NewWindowController>()),
session_controller_(std::make_unique<SessionControllerImpl>()),
note_taking_controller_(std::make_unique<NoteTakingController>()),
shell_delegate_(std::move(shell_delegate)),
shell_state_(std::make_unique<ShellState>()),
shutdown_controller_(std::make_unique<ShutdownController>()),
system_tray_notifier_(std::make_unique<SystemTrayNotifier>()),
vpn_list_(std::make_unique<VpnList>()),
window_cycle_controller_(std::make_unique<WindowCycleController>()),
native_cursor_manager_(nullptr),
weak_factory_(this) {
// Ash doesn't properly remove pre-target-handlers.
ui::EventHandler::DisableCheckTargets();
AccelerometerReader::GetInstance()->Initialize(
base::CreateSequencedTaskRunnerWithTraits(
{base::MayBlock(), base::TaskPriority::BEST_EFFORT,
base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN}));
login_screen_controller_ =
std::make_unique<LoginScreenController>(system_tray_notifier_.get());
display_manager_.reset(ScreenAsh::CreateDisplayManager());
display_output_protection_ = std::make_unique<DisplayOutputProtection>(
display_manager_->configurator());
window_tree_host_manager_ = std::make_unique<WindowTreeHostManager>();
user_metrics_recorder_ = std::make_unique<UserMetricsRecorder>();
ash_keyboard_controller_ =
std::make_unique<AshKeyboardController>(session_controller_.get());
if (base::FeatureList::IsEnabled(features::kUseBluetoothSystemInAsh)) {
tray_bluetooth_helper_ =
std::make_unique<TrayBluetoothHelperExperimental>(connector_);
} else {
tray_bluetooth_helper_ = std::make_unique<TrayBluetoothHelperLegacy>();
}
PowerStatus::Initialize();
session_controller_->AddObserver(this);
}
Shell::~Shell() {
TRACE_EVENT0("shutdown", "ash::Shell::Destructor");
for (auto& observer : shell_observers_)
observer.OnShellDestroying();
// Wayland depends upon some ash specific objects. Destroy it early on.
wayland_server_controller_.reset();
user_metrics_recorder_->OnShellShuttingDown();
cros_display_config_.reset();
display_configuration_observer_.reset();
display_prefs_.reset();
// Remove the focus from any window. This will prevent overhead and side
// effects (e.g. crashes) from changing focus during shutdown.
// See bug crbug.com/134502.
aura::client::GetFocusClient(GetPrimaryRootWindow())->FocusWindow(nullptr);
// Please keep in reverse order as in Init() because it's easy to miss one.
if (window_modality_controller_)
window_modality_controller_.reset();
RemovePreTargetHandler(magnifier_key_scroll_handler_.get());
magnifier_key_scroll_handler_.reset();
RemovePreTargetHandler(speech_feedback_handler_.get());
speech_feedback_handler_.reset();
RemovePreTargetHandler(overlay_filter_.get());
overlay_filter_.reset();
RemovePreTargetHandler(accelerator_filter_.get());
RemovePreTargetHandler(event_transformation_handler_.get());
RemovePreTargetHandler(toplevel_window_event_handler_.get());
RemovePostTargetHandler(toplevel_window_event_handler_.get());
RemovePreTargetHandler(system_gesture_filter_.get());
RemovePreTargetHandler(mouse_cursor_filter_.get());
RemovePreTargetHandler(modality_filter_.get());
RemovePreTargetHandler(tooltip_controller_.get());
event_rewriter_controller_.reset();
screen_orientation_controller_.reset();
screen_layout_observer_.reset();
// Destroy the virtual keyboard controller before the tablet mode controller
// since the latters destructor triggers events that the former is listening
// to but no longer cares about.
ash_keyboard_controller_->DestroyVirtualKeyboard();
// Depends on |tablet_mode_controller_|.
shelf_controller_->Shutdown();
// Destroy |home_screen_controller_| before |app_list_controller_| since
// the former delegates to the latter.
home_screen_controller_.reset();
// Destroy |app_list_controller_| earlier than |tablet_mode_controller_| since
// the former may use the latter before destruction.
app_list_controller_.reset();
// Accelerometer file reader stops listening to tablet mode controller.
AccelerometerReader::GetInstance()->StopListenToTabletModeController();
// Destroy |assistant_controller_| earlier than |tablet_mode_controller_| so
// that the former will destroy the Assistant view hierarchy which has a
// dependency on the latter.
if (chromeos::switches::IsAssistantEnabled())
assistant_controller_.reset();
// Destroy tablet mode controller early on since it has some observers which
// need to be removed.
tablet_mode_controller_.reset();
kiosk_next_shell_controller_.reset();
toast_manager_.reset();
tray_bluetooth_helper_.reset();
// Accesses root window containers.
logout_confirmation_controller_.reset();
// Drag-and-drop must be canceled prior to close all windows.
for (aura::Window* root : GetAllRootWindows())
aura::client::SetDragDropClient(root, nullptr);
drag_drop_controller_.reset();
// Controllers who have WindowObserver added must be deleted
// before |window_tree_host_manager_| is deleted.
persistent_window_controller_.reset();
// VideoActivityNotifier must be deleted before |video_detector_| is
// deleted because it's observing video activity through
// VideoDetector::Observer interface.
video_activity_notifier_.reset();
video_detector_.reset();
high_contrast_controller_.reset();
shadow_controller_.reset();
resize_shadow_controller_.reset();
// Has to happen before ~MruWindowTracker.
window_cycle_controller_.reset();
overview_controller_.reset();
// |split_view_controller_| needs to be deleted after
// |overview_controller_|.
split_view_controller_.reset();
// Stop dispatching events (e.g. synthesized mouse exits from window close).
// https://crbug.com/874156
for (RootWindowController* rwc : GetAllRootWindowControllers())
rwc->GetHost()->dispatcher()->Shutdown();
// Close all widgets (including the shelf) and destroy all window containers.
CloseAllRootWindowChildWindows();
login_screen_controller_.reset();
system_notification_controller_.reset();
// Should be destroyed after Shelf and |system_notification_controller_|.
system_tray_model_.reset();
// MruWindowTracker must be destroyed after all windows have been deleted to
// avoid a possible crash when Shell is destroyed from a non-normal shutdown
// path. (crbug.com/485438).
mru_window_tracker_.reset();
// These need a valid Shell instance to clean up properly, so explicitly
// delete them before invalidating the instance.
// Alphabetical. TODO(oshima): sort.
autoclick_controller_.reset();
magnification_controller_.reset();
tooltip_controller_.reset();
event_client_.reset();
toplevel_window_event_handler_.reset();
visibility_controller_.reset();
power_prefs_.reset();
tray_action_.reset();
power_button_controller_.reset();
lock_state_controller_.reset();
backlights_forced_off_setter_.reset();
screen_pinning_controller_.reset();
multidevice_notification_presenter_.reset();
resolution_notification_controller_.reset();
screenshot_controller_.reset();
mouse_cursor_filter_.reset();
modality_filter_.reset();
touch_transformer_controller_.reset();
laser_pointer_controller_.reset();
partial_magnification_controller_.reset();
highlighter_controller_.reset();
voice_interaction_controller_.reset();
key_accessibility_enabler_.reset();
display_speaker_controller_.reset();
screen_switch_check_controller_.reset();
ScreenAsh::CreateScreenForShutdown();
display_configuration_controller_.reset();
// These members access Shell in their destructors.
wallpaper_controller_.reset();
accessibility_controller_.reset();
accessibility_delegate_.reset();
accessibility_focus_ring_controller_.reset();
policy_recommendation_restorer_.reset();
ime_controller_.reset();
ime_engine_factory_registry_.reset();
// Balances the Install() in Initialize().
views::FocusManagerFactory::Install(nullptr);
// ShelfWindowWatcher has window observers and a pointer to the shelf model.
shelf_window_watcher_.reset();
// Removes itself as an observer of |pref_service_|.
shelf_controller_.reset();
// NightLightController depends on the PrefService as well as the window tree
// host manager, and must be destructed before them. crbug.com/724231.
night_light_controller_ = nullptr;
// Similarly for DockedMagnifierController.
docked_magnifier_controller_ = nullptr;
// Stop observing window activation changes before closing all windows.
focus_controller_->RemoveObserver(this);
// This also deletes all RootWindows. Note that we invoke Shutdown() on
// WindowTreeHostManager before resetting |window_tree_host_manager_|, since
// destruction of its owned RootWindowControllers relies on the value.
window_tree_host_manager_->Shutdown();
// Depends on |focus_controller_|, so must be destroyed before.
window_tree_host_manager_.reset();
// The desks controller is destroyed after the window tree host manager. At
// this point it is guaranteed that querying the active desk is no longer
// needed.
desks_controller_.reset();
focus_rules_ = nullptr;
focus_controller_.reset();
screen_position_controller_.reset();
display_color_manager_.reset();
projecting_observer_.reset();
if (display_change_observer_)
display_manager_->configurator()->RemoveObserver(
display_change_observer_.get());
if (display_error_observer_)
display_manager_->configurator()->RemoveObserver(
display_error_observer_.get());
display_change_observer_.reset();
display_shutdown_observer_.reset();
ash_keyboard_controller_.reset();
PowerStatus::Shutdown();
// Depends on SessionController.
power_event_observer_.reset();
notification_reporter_.reset();
session_controller_->RemoveObserver(this);
// BluetoothPowerController depends on the PrefService and must be destructed
// before it.
bluetooth_power_controller_ = nullptr;
// TouchDevicesController depends on the PrefService and must be destructed
// before it.
touch_devices_controller_ = nullptr;
// DetachableBaseNotificationController depends on DetachableBaseHandler, and
// has to be destructed before it.
detachable_base_notification_controller_.reset();
// DetachableBaseHandler depends on the PrefService and must be destructed
// before it.
detachable_base_handler_.reset();
// MediaNotificationController depends on MessageCenter and must be destructed
// before it.
media_notification_controller_.reset();
// Destroys the MessageCenter singleton, so must happen late.
message_center_controller_.reset();
shell_delegate_.reset();
if (!::features::IsMultiProcessMash()) {
// Must be shut down after detachable_base_handler_.
chromeos::HammerdClient::Shutdown();
}
for (auto& observer : shell_observers_)
observer.OnShellDestroyed();
DCHECK(instance_ == this);
instance_ = nullptr;
}
void Shell::Init(
ui::ContextFactory* context_factory,
ui::ContextFactoryPrivate* context_factory_private,
PrefService* local_state,
std::unique_ptr<keyboard::KeyboardUIFactory> keyboard_ui_factory,
scoped_refptr<dbus::Bus> dbus_bus) {
// Required by DetachableBaseHandler.
chromeos::InitializeDBusClient<chromeos::HammerdClient>(dbus_bus.get());
local_state_ = local_state;
// This creates the MessageCenter object which is used by some other objects
// initialized here, so it needs to come early.
message_center_controller_ = std::make_unique<MessageCenterController>();
// These controllers call Shell::Get() in their constructors, so they cannot
// be in the member initialization list.
touch_devices_controller_ = std::make_unique<TouchDevicesController>();
bluetooth_power_controller_ =
std::make_unique<BluetoothPowerController>(local_state_);
detachable_base_handler_ =
std::make_unique<DetachableBaseHandler>(local_state_);
detachable_base_notification_controller_ =
std::make_unique<DetachableBaseNotificationController>(
detachable_base_handler_.get());
display_speaker_controller_ = std::make_unique<DisplaySpeakerController>();
policy_recommendation_restorer_ =
std::make_unique<PolicyRecommendationRestorer>();
screen_switch_check_controller_ =
std::make_unique<ScreenSwitchCheckController>();
// Connector can be null in tests.
if (connector_) {
multidevice_notification_presenter_ =
std::make_unique<MultiDeviceNotificationPresenter>(
message_center::MessageCenter::Get(), connector_);
}
kiosk_next_shell_controller_ = std::make_unique<KioskNextShellController>();
tablet_mode_controller_ = std::make_unique<TabletModeController>();
accessibility_focus_ring_controller_ =
std::make_unique<AccessibilityFocusRingController>();
accessibility_delegate_.reset(shell_delegate_->CreateAccessibilityDelegate());
accessibility_controller_ = std::make_unique<AccessibilityController>();
toast_manager_ = std::make_unique<ToastManager>();
// Accelerometer file reader starts listening to tablet mode controller.
AccelerometerReader::GetInstance()->StartListenToTabletModeController();
// Install the custom factory early on so that views::FocusManagers for Tray,
// Shelf, and WallPaper could be created by the factory.
views::FocusManagerFactory::Install(new AshFocusManagerFactory);
wallpaper_controller_ = std::make_unique<WallpaperController>(local_state_);
window_positioner_ = std::make_unique<WindowPositioner>();
native_cursor_manager_ = new NativeCursorManagerAsh;
cursor_manager_ =
std::make_unique<CursorManager>(base::WrapUnique(native_cursor_manager_));
InitializeDisplayManager();
display_prefs_ = std::make_unique<DisplayPrefs>(local_state_);
// This will initialize aura::Env which requires |display_manager_| to
// be initialized first.
if (context_factory)
aura_env_->set_context_factory(context_factory);
if (context_factory_private)
aura_env_->set_context_factory_private(context_factory_private);
// Night Light depends on the display manager, the display color manager, and
// aura::Env, so initialize it after all have been initialized.
night_light_controller_ = std::make_unique<NightLightController>();
// The WindowModalityController needs to be at the front of the input event
// pretarget handler list to ensure that it processes input events when modal
// windows are active.
window_modality_controller_ =
std::make_unique<::wm::WindowModalityController>(this, aura_env_);
event_rewriter_controller_ = std::make_unique<EventRewriterController>();
env_filter_ = std::make_unique<::wm::CompoundEventFilter>();
AddPreTargetHandler(env_filter_.get());
// FocusController takes ownership of AshFocusRules.
focus_rules_ = new AshFocusRules();
focus_controller_ = std::make_unique<::wm::FocusController>(focus_rules_);
focus_controller_->AddObserver(this);
overview_controller_ = std::make_unique<OverviewController>();
screen_position_controller_ = std::make_unique<ScreenPositionController>();
window_tree_host_manager_->Start();
AshWindowTreeHostInitParams ash_init_params;
window_tree_host_manager_->CreatePrimaryHost(ash_init_params);
// Create the desks controller right after the window tree host manager is
// started, and before anything else is created, including the initialization
// of the hosts and the root window controllers. Many things may need to query
// the active desk, even at this early stage. For this the controller must be
// present at all times.
if (features::IsVirtualDesksEnabled())
desks_controller_ = std::make_unique<DesksController>();
time_to_first_present_recorder_ =
std::make_unique<TimeToFirstPresentRecorder>(GetPrimaryRootWindow());
shell_state_->SetRootWindowForNewWindows(GetPrimaryRootWindow());
resolution_notification_controller_ =
std::make_unique<ResolutionNotificationController>();
cursor_manager_->SetDisplay(
display::Screen::GetScreen()->GetPrimaryDisplay());
accelerator_controller_ = std::make_unique<AcceleratorControllerImpl>();
voice_interaction_controller_ =
std::make_unique<VoiceInteractionController>();
shelf_controller_ = std::make_unique<ShelfController>();
magnifier_key_scroll_handler_ = MagnifierKeyScroller::CreateHandler();
AddPreTargetHandler(magnifier_key_scroll_handler_.get());
speech_feedback_handler_ = SpokenFeedbackToggler::CreateHandler();
AddPreTargetHandler(speech_feedback_handler_.get());
// The order in which event filters are added is significant.
// ui::UserActivityDetector passes events to observers, so let them get
// rewritten first.
user_activity_detector_.reset(new ui::UserActivityDetector);
overlay_filter_.reset(new OverlayEventFilter);
AddPreTargetHandler(overlay_filter_.get());
accelerator_filter_.reset(new ::wm::AcceleratorFilter(
std::make_unique<PreTargetAcceleratorHandler>(),
accelerator_controller_->accelerator_history()));
AddPreTargetHandler(accelerator_filter_.get());
event_transformation_handler_.reset(new EventTransformationHandler);
AddPreTargetHandler(event_transformation_handler_.get());
toplevel_window_event_handler_ =
std::make_unique<ToplevelWindowEventHandler>();
system_gesture_filter_ = std::make_unique<SystemGestureEventFilter>();
AddPreTargetHandler(system_gesture_filter_.get());
sticky_keys_controller_.reset(new StickyKeysController);
screen_pinning_controller_ = std::make_unique<ScreenPinningController>();
power_prefs_ = std::make_unique<PowerPrefs>(
chromeos::PowerPolicyController::Get(),
chromeos::PowerManagerClient::Get(), local_state_);
backlights_forced_off_setter_ = std::make_unique<BacklightsForcedOffSetter>();
tray_action_ =
std::make_unique<TrayAction>(backlights_forced_off_setter_.get());
lock_state_controller_ =
std::make_unique<LockStateController>(shutdown_controller_.get());
power_button_controller_ = std::make_unique<PowerButtonController>(
backlights_forced_off_setter_.get());
// Pass the initial display state to PowerButtonController.
power_button_controller_->OnDisplayModeChanged(
display_configurator()->cached_displays());
drag_drop_controller_ = std::make_unique<DragDropController>();
// |screenshot_controller_| needs to be created (and prepended as a
// pre-target handler) at this point, because |mouse_cursor_filter_| needs to
// process mouse events prior to screenshot session.
// See http://crbug.com/459214
screenshot_controller_ = std::make_unique<ScreenshotController>(
shell_delegate_->CreateScreenshotDelegate());
mouse_cursor_filter_ = std::make_unique<MouseCursorEventFilter>();
AddPreTargetHandler(mouse_cursor_filter_.get(),
ui::EventTarget::Priority::kAccessibility);
// Create Controllers that may need root window.
// TODO(oshima): Move as many controllers before creating
// RootWindowController as possible.
visibility_controller_.reset(new AshVisibilityController);
laser_pointer_controller_.reset(new LaserPointerController());
partial_magnification_controller_.reset(new PartialMagnificationController());
highlighter_controller_.reset(new HighlighterController());
magnification_controller_ = std::make_unique<MagnificationController>();
mru_window_tracker_ = std::make_unique<MruWindowTracker>();
assistant_controller_ = chromeos::switches::IsAssistantEnabled()
? std::make_unique<AssistantController>()
: nullptr;
home_screen_controller_ = std::make_unique<HomeScreenController>();
// |tablet_mode_controller_| |mru_window_tracker_|,
// |assistant_controller_| and |home_screen_controller_| are put before
// |app_list_controller_| as they are used in its constructor.
app_list_controller_ = std::make_unique<AppListControllerImpl>();
home_screen_controller_->SetDelegate(app_list_controller_.get());
autoclick_controller_ = std::make_unique<AutoclickController>();
high_contrast_controller_.reset(new HighContrastController);
docked_magnifier_controller_ = std::make_unique<DockedMagnifierController>();
video_detector_ = std::make_unique<VideoDetector>();
tooltip_controller_.reset(new views::corewm::TooltipController(
std::unique_ptr<views::corewm::Tooltip>(new views::corewm::TooltipAura)));
AddPreTargetHandler(tooltip_controller_.get());
modality_filter_.reset(new SystemModalContainerEventFilter(this));
AddPreTargetHandler(modality_filter_.get());
event_client_.reset(new EventClientImpl);
resize_shadow_controller_.reset(new ResizeShadowController());
shadow_controller_ = std::make_unique<::wm::ShadowController>(
focus_controller_.get(), std::make_unique<WmShadowControllerDelegate>(),
aura_env_);
logout_confirmation_controller_ =
std::make_unique<LogoutConfirmationController>();
// May trigger initialization of the Bluetooth adapter.
tray_bluetooth_helper_->Initialize();
// Create AshTouchTransformController before
// WindowTreeHostManager::InitDisplays()
// since AshTouchTransformController listens on
// WindowTreeHostManager::Observer::OnDisplaysInitialized().
touch_transformer_controller_ = std::make_unique<AshTouchTransformController>(
display_manager_.get(),
std::make_unique<display::DefaultTouchTransformSetter>());
// |system_tray_model_| should be available before
// |system_notification_controller_| is initialized and Shelf is created by
// WindowTreeHostManager::InitHosts.
system_tray_model_ = std::make_unique<SystemTrayModel>(connector_);
system_notification_controller_ =
std::make_unique<SystemNotificationController>();
window_tree_host_manager_->InitHosts();
// Create virtual keyboard after WindowTreeHostManager::InitHosts() since
// it may enable the virtual keyboard immediately, which requires a
// WindowTreeHostManager to host the keyboard window.
ash_keyboard_controller_->CreateVirtualKeyboard(
std::move(keyboard_ui_factory));
cursor_manager_->HideCursor(); // Hide the mouse cursor on startup.
cursor_manager_->SetCursor(ui::CursorType::kPointer);
peripheral_battery_notifier_ = std::make_unique<PeripheralBatteryNotifier>();
power_event_observer_.reset(new PowerEventObserver());
user_activity_notifier_ =
std::make_unique<ui::UserActivityPowerManagerNotifier>(
user_activity_detector_.get(), connector_);
video_activity_notifier_.reset(
new VideoActivityNotifier(video_detector_.get()));
bluetooth_notification_controller_.reset(new BluetoothNotificationController);
screen_orientation_controller_ =
std::make_unique<ScreenOrientationController>();
screen_layout_observer_.reset(new ScreenLayoutObserver());
sms_observer_.reset(new SmsObserver());
split_view_controller_.reset(new SplitViewController());
snap_controller_ = std::make_unique<SnapControllerImpl>();
key_accessibility_enabler_ = std::make_unique<KeyAccessibilityEnabler>();
// The compositor thread and main message loop have to be running in
// order to create mirror window. Run it after the main message loop
// is started.
display_manager_->CreateMirrorWindowAsyncIfAny();
if (base::FeatureList::IsEnabled(features::kMediaSessionNotification)) {
media_notification_controller_ =
std::make_unique<MediaNotificationController>(connector_);
}
for (auto& observer : shell_observers_)
observer.OnShellInitialized();
user_metrics_recorder_->OnShellInitialized();
notification_reporter_ = std::make_unique<NotificationReporter>();
// Initialize the D-Bus bus and services for ash.
if (!::features::IsMultiProcessMash())
ash_dbus_helper_ = AshDBusHelper::CreateWithExistingBus(dbus_bus);
ash_dbus_services_ = std::make_unique<AshDBusServices>(dbus_bus.get());
// By this point ash shell should have initialized its D-Bus signal
// listeners, so inform the session manager that Ash is initialized.
session_controller_->EmitAshInitialized();
}
void Shell::InitializeDisplayManager() {
bool display_initialized = display_manager_->InitFromCommandLine();
display_manager_->InitConfigurator(
ui::OzonePlatform::GetInstance()->CreateNativeDisplayDelegate());
display_configuration_controller_ =
std::make_unique<DisplayConfigurationController>(
display_manager_.get(), window_tree_host_manager_.get());
display_configuration_observer_ =
std::make_unique<DisplayConfigurationObserver>();
cros_display_config_ = std::make_unique<CrosDisplayConfig>();
persistent_window_controller_ =
std::make_unique<PersistentWindowController>();
projecting_observer_ =
std::make_unique<ProjectingObserver>(display_manager_->configurator());
if (!display_initialized) {
if (chromeos::IsRunningAsSystemCompositor()) {
display_change_observer_ =
std::make_unique<display::DisplayChangeObserver>(
display_manager_.get());
display_error_observer_ = std::make_unique<DisplayErrorObserver>();
display_shutdown_observer_ = std::make_unique<DisplayShutdownObserver>(
display_manager_->configurator());
display_manager_->ForceInitialConfigureWithObservers(
display_change_observer_.get(), display_error_observer_.get());
display_initialized = true;
}
}
display_color_manager_ = std::make_unique<DisplayColorManager>(
display_manager_->configurator(), display::Screen::GetScreen());
if (!display_initialized)
display_manager_->InitDefaultDisplay();
display_manager_->RefreshFontParams();
}
void Shell::InitRootWindow(aura::Window* root_window) {
DCHECK(focus_controller_);
DCHECK(visibility_controller_.get());
aura::client::SetFocusClient(root_window, focus_controller_.get());
::wm::SetActivationClient(root_window, focus_controller_.get());
root_window->AddPreTargetHandler(focus_controller_.get());
aura::client::SetVisibilityClient(root_window, visibility_controller_.get());
aura::client::SetDragDropClient(root_window, drag_drop_controller_.get());
aura::client::SetScreenPositionClient(root_window,
screen_position_controller_.get());
aura::client::SetCursorClient(root_window, cursor_manager_.get());
::wm::SetTooltipClient(root_window, tooltip_controller_.get());
aura::client::SetEventClient(root_window, event_client_.get());
::wm::SetWindowMoveClient(root_window, toplevel_window_event_handler_.get());
root_window->AddPreTargetHandler(toplevel_window_event_handler_.get());
root_window->AddPostTargetHandler(toplevel_window_event_handler_.get());
}
void Shell::CloseAllRootWindowChildWindows() {
for (aura::Window* root : GetAllRootWindows()) {
RootWindowController* controller = RootWindowController::ForWindow(root);
if (controller) {
controller->CloseChildWindows();
} else {
while (!root->children().empty()) {
aura::Window* child = root->children()[0];
delete child;
}
}
}
}
bool Shell::CanWindowReceiveEvents(aura::Window* window) {
RootWindowControllerList controllers = GetAllRootWindowControllers();
for (RootWindowController* controller : controllers) {
if (controller->CanWindowReceiveEvents(window))
return true;
}
return false;
}
////////////////////////////////////////////////////////////////////////////////
// Shell, ui::EventTarget overrides:
bool Shell::CanAcceptEvent(const ui::Event& event) {
return true;
}
ui::EventTarget* Shell::GetParentTarget() {
return aura_env_;
}
std::unique_ptr<ui::EventTargetIterator> Shell::GetChildIterator() const {
return std::unique_ptr<ui::EventTargetIterator>();
}
ui::EventTargeter* Shell::GetEventTargeter() {
NOTREACHED();
return nullptr;
}
void Shell::OnWindowActivated(
::wm::ActivationChangeObserver::ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) {
if (!gained_active)
return;
shell_state_->SetRootWindowForNewWindows(gained_active->GetRootWindow());
}
void Shell::OnFirstSessionStarted() {
// Enable magnifier scroll keys as there may be no mouse cursor in kiosk mode.
MagnifierKeyScroller::SetEnabled(session_controller_->IsRunningInAppMode());
// Enable long press action to toggle spoken feedback with hotrod remote
// which can't handle shortcuts.
SpokenFeedbackToggler::SetEnabled(session_controller_->IsRunningInAppMode());
}
void Shell::OnSessionStateChanged(session_manager::SessionState state) {
const bool is_session_active = state == session_manager::SessionState::ACTIVE;
// Initialize the |shelf_window_watcher_| when a session becomes active.
// Shelf itself is initialized in RootWindowController.
if (is_session_active && !shelf_window_watcher_)
shelf_window_watcher_ = std::make_unique<ShelfWindowWatcher>(shelf_model());
// Disable drag-and-drop during OOBE and GAIA login screens by only enabling
// the controller when the session is active. https://crbug.com/464118
drag_drop_controller_->set_enabled(is_session_active);
}
void Shell::OnLoginStatusChanged(LoginStatus login_status) {
UpdateAfterLoginStatusChange(login_status);
}
void Shell::OnLockStateChanged(bool locked) {
#ifndef NDEBUG
// Make sure that there is no system modal in Lock layer when unlocked.
if (!locked) {
aura::Window::Windows containers = wm::GetContainersFromAllRootWindows(
kShellWindowId_LockSystemModalContainer, GetPrimaryRootWindow());
for (aura::Window* container : containers)
DCHECK(container->children().empty());
}
#endif
}
} // namespace ash