ash/shell_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ash/shell.h"
   6
   7 #include <algorithm>
   8 #include <vector>
   9
  10 #include "ash/ash_switches.h"
  11 #include "ash/desktop_background/desktop_background_widget_controller.h"
  12 #include "ash/display/mouse_cursor_event_filter.h"
  13 #include "ash/drag_drop/drag_drop_controller.h"
  14 #include "ash/root_window_controller.h"
  15 #include "ash/session_state_delegate.h"
  16 #include "ash/shelf/shelf.h"
  17 #include "ash/shelf/shelf_layout_manager.h"
  18 #include "ash/shelf/shelf_widget.h"
  19 #include "ash/shell_delegate.h"
  20 #include "ash/shell_window_ids.h"
  21 #include "ash/test/ash_test_base.h"
  22 #include "ash/test/shell_test_api.h"
  23 #include "ash/wm/root_window_layout_manager.h"
  24 #include "ash/wm/window_util.h"
  25 #include "base/strings/utf_string_conversions.h"
  26 #include "ui/aura/client/aura_constants.h"
  27 #include "ui/aura/env.h"
  28 #include "ui/aura/root_window.h"
  29 #include "ui/aura/test/event_generator.h"
  30 #include "ui/aura/test/test_event_handler.h"
  31 #include "ui/aura/window.h"
  32 #include "ui/base/models/simple_menu_model.h"
  33 #include "ui/events/test/events_test_utils.h"
  34 #include "ui/gfx/size.h"
  35 #include "ui/views/controls/menu/menu_controller.h"
  36 #include "ui/views/controls/menu/menu_runner.h"
  37 #include "ui/views/widget/widget.h"
  38 #include "ui/views/widget/widget_delegate.h"
  39 #include "ui/views/window/dialog_delegate.h"
  40
  41 using aura::RootWindow;
  42
  43 namespace ash {
  44
  45 namespace {
  46
  47 aura::Window* GetDefaultContainer() {
  48   return Shell::GetContainer(
  49       Shell::GetPrimaryRootWindow(),
  50       internal::kShellWindowId_DefaultContainer);
  51 }
  52
  53 aura::Window* GetAlwaysOnTopContainer() {
  54   return Shell::GetContainer(
  55       Shell::GetPrimaryRootWindow(),
  56       internal::kShellWindowId_AlwaysOnTopContainer);
  57 }
  58
  59 // Expect ALL the containers!
  60 void ExpectAllContainers() {
  61   aura::Window* root_window = Shell::GetPrimaryRootWindow();
  62   EXPECT_TRUE(Shell::GetContainer(
  63       root_window, internal::kShellWindowId_DesktopBackgroundContainer));
  64   EXPECT_TRUE(Shell::GetContainer(
  65       root_window, internal::kShellWindowId_DefaultContainer));
  66   EXPECT_TRUE(Shell::GetContainer(
  67       root_window, internal::kShellWindowId_AlwaysOnTopContainer));
  68   EXPECT_TRUE(Shell::GetContainer(
  69       root_window, internal::kShellWindowId_PanelContainer));
  70   EXPECT_TRUE(Shell::GetContainer(
  71       root_window, internal::kShellWindowId_ShelfContainer));
  72   EXPECT_TRUE(Shell::GetContainer(
  73       root_window, internal::kShellWindowId_SystemModalContainer));
  74   EXPECT_TRUE(Shell::GetContainer(
  75       root_window, internal::kShellWindowId_LockScreenBackgroundContainer));
  76   EXPECT_TRUE(Shell::GetContainer(
  77       root_window, internal::kShellWindowId_LockScreenContainer));
  78   EXPECT_TRUE(Shell::GetContainer(
  79       root_window, internal::kShellWindowId_LockSystemModalContainer));
  80   EXPECT_TRUE(Shell::GetContainer(
  81       root_window, internal::kShellWindowId_StatusContainer));
  82   EXPECT_TRUE(Shell::GetContainer(
  83       root_window, internal::kShellWindowId_MenuContainer));
  84   EXPECT_TRUE(Shell::GetContainer(
  85       root_window, internal::kShellWindowId_DragImageAndTooltipContainer));
  86   EXPECT_TRUE(Shell::GetContainer(
  87       root_window, internal::kShellWindowId_SettingBubbleContainer));
  88   EXPECT_TRUE(Shell::GetContainer(
  89       root_window, internal::kShellWindowId_OverlayContainer));
  90 }
  91
  92 class ModalWindow : public views::WidgetDelegateView {
  93  public:
  94   ModalWindow() {}
  95   virtual ~ModalWindow() {}
  96
  97   // Overridden from views::WidgetDelegate:
  98   virtual views::View* GetContentsView() OVERRIDE {
  99     return this;
 100   }
 101   virtual bool CanResize() const OVERRIDE {
 102     return true;
 103   }
 104   virtual base::string16 GetWindowTitle() const OVERRIDE {
 105     return ASCIIToUTF16("Modal Window");
 106   }
 107   virtual ui::ModalType GetModalType() const OVERRIDE {
 108     return ui::MODAL_TYPE_SYSTEM;
 109   }
 110
 111  private:
 112   DISALLOW_COPY_AND_ASSIGN(ModalWindow);
 113 };
 114
 115 class SimpleMenuDelegate : public ui::SimpleMenuModel::Delegate {
 116  public:
 117   SimpleMenuDelegate() {}
 118   virtual ~SimpleMenuDelegate() {}
 119
 120   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE {
 121     return false;
 122   }
 123
 124   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE {
 125     return true;
 126   }
 127
 128   virtual bool GetAcceleratorForCommandId(
 129       int command_id,
 130       ui::Accelerator* accelerator) OVERRIDE {
 131     return false;
 132   }
 133
 134   virtual void ExecuteCommand(int command_id, int event_flags) OVERRIDE {
 135   }
 136
 137  private:
 138   DISALLOW_COPY_AND_ASSIGN(SimpleMenuDelegate);
 139 };
 140
 141 }  // namespace
 142
 143 class ShellTest : public test::AshTestBase {
 144  public:
 145   views::Widget* CreateTestWindow(views::Widget::InitParams params) {
 146     views::Widget* widget = new views::Widget;
 147     params.context = CurrentContext();
 148     widget->Init(params);
 149     return widget;
 150   }
 151
 152   void TestCreateWindow(views::Widget::InitParams::Type type,
 153                         bool always_on_top,
 154                         aura::Window* expected_container) {
 155     views::Widget::InitParams widget_params(type);
 156     widget_params.keep_on_top = always_on_top;
 157
 158     views::Widget* widget = CreateTestWindow(widget_params);
 159     widget->Show();
 160
 161     EXPECT_TRUE(
 162         expected_container->Contains(widget->GetNativeWindow()->parent())) <<
 163         "TestCreateWindow: type=" << type << ", always_on_top=" <<
 164         always_on_top;
 165
 166     widget->Close();
 167   }
 168
 169   void LockScreenAndVerifyMenuClosed() {
 170     // Verify a menu is open before locking.
 171     views::MenuController* menu_controller =
 172         views::MenuController::GetActiveInstance();
 173     DCHECK(menu_controller);
 174     EXPECT_EQ(views::MenuController::EXIT_NONE, menu_controller->exit_type());
 175
 176     // Create a LockScreen window.
 177     views::Widget::InitParams widget_params(
 178         views::Widget::InitParams::TYPE_WINDOW);
 179     SessionStateDelegate* delegate =
 180         Shell::GetInstance()->session_state_delegate();
 181     delegate->LockScreen();
 182     views::Widget* lock_widget = CreateTestWindow(widget_params);
 183     ash::Shell::GetContainer(
 184         Shell::GetPrimaryRootWindow(),
 185         ash::internal::kShellWindowId_LockScreenContainer)->
 186         AddChild(lock_widget->GetNativeView());
 187     lock_widget->Show();
 188     EXPECT_TRUE(delegate->IsScreenLocked());
 189     EXPECT_TRUE(lock_widget->GetNativeView()->HasFocus());
 190
 191     // Verify menu is closed.
 192     EXPECT_NE(views::MenuController::EXIT_NONE, menu_controller->exit_type());
 193     lock_widget->Close();
 194     delegate->UnlockScreen();
 195
 196     // In case the menu wasn't closed, cancel the menu to exit the nested menu
 197     // run loop so that the test will not time out.
 198     menu_controller->CancelAll();
 199   }
 200 };
 201
 202 TEST_F(ShellTest, CreateWindow) {
 203   // Normal window should be created in default container.
 204   TestCreateWindow(views::Widget::InitParams::TYPE_WINDOW,
 205                    false,  // always_on_top
 206                    GetDefaultContainer());
 207   TestCreateWindow(views::Widget::InitParams::TYPE_POPUP,
 208                    false,  // always_on_top
 209                    GetDefaultContainer());
 210
 211   // Always-on-top window and popup are created in always-on-top container.
 212   TestCreateWindow(views::Widget::InitParams::TYPE_WINDOW,
 213                    true,  // always_on_top
 214                    GetAlwaysOnTopContainer());
 215   TestCreateWindow(views::Widget::InitParams::TYPE_POPUP,
 216                    true,  // always_on_top
 217                    GetAlwaysOnTopContainer());
 218 }
 219
 220 TEST_F(ShellTest, ChangeAlwaysOnTop) {
 221   views::Widget::InitParams widget_params(
 222       views::Widget::InitParams::TYPE_WINDOW);
 223
 224   // Creates a normal window
 225   views::Widget* widget = CreateTestWindow(widget_params);
 226   widget->Show();
 227
 228   // It should be in default container.
 229   EXPECT_TRUE(GetDefaultContainer()->Contains(
 230                   widget->GetNativeWindow()->parent()));
 231
 232   // Flip always-on-top flag.
 233   widget->SetAlwaysOnTop(true);
 234   // And it should in always on top container now.
 235   EXPECT_EQ(GetAlwaysOnTopContainer(), widget->GetNativeWindow()->parent());
 236
 237   // Flip always-on-top flag.
 238   widget->SetAlwaysOnTop(false);
 239   // It should go back to default container.
 240   EXPECT_TRUE(GetDefaultContainer()->Contains(
 241                   widget->GetNativeWindow()->parent()));
 242
 243   // Set the same always-on-top flag again.
 244   widget->SetAlwaysOnTop(false);
 245   // Should have no effect and we are still in the default container.
 246   EXPECT_TRUE(GetDefaultContainer()->Contains(
 247                   widget->GetNativeWindow()->parent()));
 248
 249   widget->Close();
 250 }
 251
 252 TEST_F(ShellTest, CreateModalWindow) {
 253   views::Widget::InitParams widget_params(
 254       views::Widget::InitParams::TYPE_WINDOW);
 255
 256   // Create a normal window.
 257   views::Widget* widget = CreateTestWindow(widget_params);
 258   widget->Show();
 259
 260   // It should be in default container.
 261   EXPECT_TRUE(GetDefaultContainer()->Contains(
 262                   widget->GetNativeWindow()->parent()));
 263
 264   // Create a modal window.
 265   views::Widget* modal_widget = views::Widget::CreateWindowWithParent(
 266       new ModalWindow(), widget->GetNativeView());
 267   modal_widget->Show();
 268
 269   // It should be in modal container.
 270   aura::Window* modal_container = Shell::GetContainer(
 271       Shell::GetPrimaryRootWindow(),
 272       internal::kShellWindowId_SystemModalContainer);
 273   EXPECT_EQ(modal_container, modal_widget->GetNativeWindow()->parent());
 274
 275   modal_widget->Close();
 276   widget->Close();
 277 }
 278
 279 class TestModalDialogDelegate : public views::DialogDelegateView {
 280  public:
 281   TestModalDialogDelegate() {}
 282
 283   // Overridden from views::WidgetDelegate:
 284   virtual ui::ModalType GetModalType() const OVERRIDE {
 285     return ui::MODAL_TYPE_SYSTEM;
 286   }
 287 };
 288
 289 TEST_F(ShellTest, CreateLockScreenModalWindow) {
 290   views::Widget::InitParams widget_params(
 291       views::Widget::InitParams::TYPE_WINDOW);
 292
 293   // Create a normal window.
 294   views::Widget* widget = CreateTestWindow(widget_params);
 295   widget->Show();
 296   EXPECT_TRUE(widget->GetNativeView()->HasFocus());
 297
 298   // It should be in default container.
 299   EXPECT_TRUE(GetDefaultContainer()->Contains(
 300                   widget->GetNativeWindow()->parent()));
 301
 302   Shell::GetInstance()->session_state_delegate()->LockScreen();
 303   // Create a LockScreen window.
 304   views::Widget* lock_widget = CreateTestWindow(widget_params);
 305   ash::Shell::GetContainer(
 306       Shell::GetPrimaryRootWindow(),
 307       ash::internal::kShellWindowId_LockScreenContainer)->
 308       AddChild(lock_widget->GetNativeView());
 309   lock_widget->Show();
 310   EXPECT_TRUE(lock_widget->GetNativeView()->HasFocus());
 311
 312   // It should be in LockScreen container.
 313   aura::Window* lock_screen = Shell::GetContainer(
 314       Shell::GetPrimaryRootWindow(),
 315       ash::internal::kShellWindowId_LockScreenContainer);
 316   EXPECT_EQ(lock_screen, lock_widget->GetNativeWindow()->parent());
 317
 318   // Create a modal window with a lock window as parent.
 319   views::Widget* lock_modal_widget = views::Widget::CreateWindowWithParent(
 320       new ModalWindow(), lock_widget->GetNativeView());
 321   lock_modal_widget->Show();
 322   EXPECT_TRUE(lock_modal_widget->GetNativeView()->HasFocus());
 323
 324   // It should be in LockScreen modal container.
 325   aura::Window* lock_modal_container = Shell::GetContainer(
 326       Shell::GetPrimaryRootWindow(),
 327       ash::internal::kShellWindowId_LockSystemModalContainer);
 328   EXPECT_EQ(lock_modal_container,
 329             lock_modal_widget->GetNativeWindow()->parent());
 330
 331   // Create a modal window with a normal window as parent.
 332   views::Widget* modal_widget = views::Widget::CreateWindowWithParent(
 333       new ModalWindow(), widget->GetNativeView());
 334   modal_widget->Show();
 335   // Window on lock screen shouldn't lost focus.
 336   EXPECT_FALSE(modal_widget->GetNativeView()->HasFocus());
 337   EXPECT_TRUE(lock_modal_widget->GetNativeView()->HasFocus());
 338
 339   // It should be in non-LockScreen modal container.
 340   aura::Window* modal_container = Shell::GetContainer(
 341       Shell::GetPrimaryRootWindow(),
 342       ash::internal::kShellWindowId_SystemModalContainer);
 343   EXPECT_EQ(modal_container, modal_widget->GetNativeWindow()->parent());
 344
 345   // Modal dialog without parent, caused crash see crbug.com/226141
 346   views::Widget* modal_dialog = views::DialogDelegate::CreateDialogWidget(
 347       new TestModalDialogDelegate(), CurrentContext(), NULL);
 348
 349   modal_dialog->Show();
 350   EXPECT_FALSE(modal_dialog->GetNativeView()->HasFocus());
 351   EXPECT_TRUE(lock_modal_widget->GetNativeView()->HasFocus());
 352
 353   modal_dialog->Close();
 354   modal_widget->Close();
 355   modal_widget->Close();
 356   lock_modal_widget->Close();
 357   lock_widget->Close();
 358   widget->Close();
 359 }
 360
 361 TEST_F(ShellTest, IsScreenLocked) {
 362   SessionStateDelegate* delegate =
 363       Shell::GetInstance()->session_state_delegate();
 364   delegate->LockScreen();
 365   EXPECT_TRUE(delegate->IsScreenLocked());
 366   delegate->UnlockScreen();
 367   EXPECT_FALSE(delegate->IsScreenLocked());
 368 }
 369
 370 TEST_F(ShellTest, LockScreenClosesActiveMenu) {
 371   SimpleMenuDelegate menu_delegate;
 372   scoped_ptr<ui::SimpleMenuModel> menu_model(
 373       new ui::SimpleMenuModel(&menu_delegate));
 374   menu_model->AddItem(0, ASCIIToUTF16("Menu item"));
 375   views::Widget* widget = ash::Shell::GetPrimaryRootWindowController()->
 376       wallpaper_controller()->widget();
 377   scoped_ptr<views::MenuRunner> menu_runner(
 378       new views::MenuRunner(menu_model.get()));
 379
 380   // When MenuRunner runs a nested loop the LockScreenAndVerifyMenuClosed
 381   // command will fire, check the menu state and ensure the nested menu loop
 382   // is exited so that the test will terminate.
 383   base::MessageLoopForUI::current()->PostTask(FROM_HERE,
 384       base::Bind(&ShellTest::LockScreenAndVerifyMenuClosed,
 385                  base::Unretained(this)));
 386
 387   EXPECT_EQ(views::MenuRunner::NORMAL_EXIT,
 388       menu_runner->RunMenuAt(widget, NULL, gfx::Rect(),
 389         views::MenuItemView::TOPLEFT, ui::MENU_SOURCE_MOUSE,
 390         views::MenuRunner::CONTEXT_MENU));
 391 }
 392
 393 TEST_F(ShellTest, ManagedWindowModeBasics) {
 394   // We start with the usual window containers.
 395   ExpectAllContainers();
 396   // Shelf is visible.
 397   ShelfWidget* shelf_widget = Shelf::ForPrimaryDisplay()->shelf_widget();
 398   EXPECT_TRUE(shelf_widget->IsVisible());
 399   // Shelf is at bottom-left of screen.
 400   EXPECT_EQ(0, shelf_widget->GetWindowBoundsInScreen().x());
 401   EXPECT_EQ(Shell::GetPrimaryRootWindow()->GetDispatcher()->host()->
 402       GetBounds().height(),
 403       shelf_widget->GetWindowBoundsInScreen().bottom());
 404   // We have a desktop background but not a bare layer.
 405   // TODO (antrim): enable once we find out why it fails component build.
 406   //  internal::DesktopBackgroundWidgetController* background =
 407   //      Shell::GetPrimaryRootWindow()->
 408   //          GetProperty(internal::kWindowDesktopComponent);
 409   //  EXPECT_TRUE(background);
 410   //  EXPECT_TRUE(background->widget());
 411   //  EXPECT_FALSE(background->layer());
 412
 413   // Create a normal window.  It is not maximized.
 414   views::Widget::InitParams widget_params(
 415       views::Widget::InitParams::TYPE_WINDOW);
 416   widget_params.bounds.SetRect(11, 22, 300, 400);
 417   views::Widget* widget = CreateTestWindow(widget_params);
 418   widget->Show();
 419   EXPECT_FALSE(widget->IsMaximized());
 420
 421   // Clean up.
 422   widget->Close();
 423 }
 424
 425 TEST_F(ShellTest, FullscreenWindowHidesShelf) {
 426   ExpectAllContainers();
 427
 428   // Create a normal window.  It is not maximized.
 429   views::Widget::InitParams widget_params(
 430       views::Widget::InitParams::TYPE_WINDOW);
 431   widget_params.bounds.SetRect(11, 22, 300, 400);
 432   views::Widget* widget = CreateTestWindow(widget_params);
 433   widget->Show();
 434   EXPECT_FALSE(widget->IsMaximized());
 435
 436   // Shelf defaults to visible.
 437   EXPECT_EQ(
 438       SHELF_VISIBLE,
 439       Shell::GetPrimaryRootWindowController()->
 440           GetShelfLayoutManager()->visibility_state());
 441
 442   // Fullscreen window hides it.
 443   widget->SetFullscreen(true);
 444   EXPECT_EQ(
 445       SHELF_HIDDEN,
 446       Shell::GetPrimaryRootWindowController()->
 447           GetShelfLayoutManager()->visibility_state());
 448
 449   // Restoring the window restores it.
 450   widget->Restore();
 451   EXPECT_EQ(
 452       SHELF_VISIBLE,
 453       Shell::GetPrimaryRootWindowController()->
 454           GetShelfLayoutManager()->visibility_state());
 455
 456   // Clean up.
 457   widget->Close();
 458 }
 459
 460 // Various assertions around SetShelfAutoHideBehavior() and
 461 // GetShelfAutoHideBehavior().
 462 TEST_F(ShellTest, ToggleAutoHide) {
 463   scoped_ptr<aura::Window> window(new aura::Window(NULL));
 464   window->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_NORMAL);
 465   window->SetType(ui::wm::WINDOW_TYPE_NORMAL);
 466   window->Init(ui::LAYER_TEXTURED);
 467   ParentWindowInPrimaryRootWindow(window.get());
 468   window->Show();
 469   wm::ActivateWindow(window.get());
 470
 471   Shell* shell = Shell::GetInstance();
 472   aura::Window* root_window = Shell::GetPrimaryRootWindow();
 473   shell->SetShelfAutoHideBehavior(ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS,
 474                                   root_window);
 475   EXPECT_EQ(ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS,
 476             shell->GetShelfAutoHideBehavior(root_window));
 477   shell->SetShelfAutoHideBehavior(ash::SHELF_AUTO_HIDE_BEHAVIOR_NEVER,
 478                                   root_window);
 479   EXPECT_EQ(ash::SHELF_AUTO_HIDE_BEHAVIOR_NEVER,
 480             shell->GetShelfAutoHideBehavior(root_window));
 481   window->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MAXIMIZED);
 482   EXPECT_EQ(ash::SHELF_AUTO_HIDE_BEHAVIOR_NEVER,
 483             shell->GetShelfAutoHideBehavior(root_window));
 484   shell->SetShelfAutoHideBehavior(ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS,
 485                                   root_window);
 486   EXPECT_EQ(ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS,
 487             shell->GetShelfAutoHideBehavior(root_window));
 488   shell->SetShelfAutoHideBehavior(ash::SHELF_AUTO_HIDE_BEHAVIOR_NEVER,
 489                                   root_window);
 490   EXPECT_EQ(ash::SHELF_AUTO_HIDE_BEHAVIOR_NEVER,
 491             shell->GetShelfAutoHideBehavior(root_window));
 492 }
 493
 494 TEST_F(ShellTest, TestPreTargetHandlerOrder) {
 495   Shell* shell = Shell::GetInstance();
 496   ui::EventTargetTestApi test_api(shell);
 497   test::ShellTestApi shell_test_api(shell);
 498
 499   const ui::EventHandlerList& handlers = test_api.pre_target_handlers();
 500   EXPECT_EQ(handlers[0], shell->mouse_cursor_filter());
 501   EXPECT_EQ(handlers[1], shell_test_api.drag_drop_controller());
 502 }
 503
 504 // Verifies an EventHandler added to Env gets notified from EventGenerator.
 505 TEST_F(ShellTest, EnvPreTargetHandler) {
 506   aura::test::TestEventHandler event_handler;
 507   aura::Env::GetInstance()->AddPreTargetHandler(&event_handler);
 508   aura::test::EventGenerator generator(Shell::GetPrimaryRootWindow());
 509   generator.MoveMouseBy(1, 1);
 510   EXPECT_NE(0, event_handler.num_mouse_events());
 511   aura::Env::GetInstance()->RemovePreTargetHandler(&event_handler);
 512 }
 513
 514 // This verifies WindowObservers are removed when a window is destroyed after
 515 // the Shell is destroyed. This scenario (aura::Windows being deleted after the
 516 // Shell) occurs if someone is holding a reference to an unparented Window, as
 517 // is the case with a RenderWidgetHostViewAura that isn't on screen. As long as
 518 // everything is ok, we won't crash. If there is a bug, window's destructor will
 519 // notify some deleted object (say VideoDetector or ActivationController) and
 520 // this will crash.
 521 class ShellTest2 : public test::AshTestBase {
 522  public:
 523   ShellTest2() {}
 524   virtual ~ShellTest2() {}
 525
 526  protected:
 527   scoped_ptr<aura::Window> window_;
 528
 529  private:
 530   DISALLOW_COPY_AND_ASSIGN(ShellTest2);
 531 };
 532
 533 TEST_F(ShellTest2, DontCrashWhenWindowDeleted) {
 534   window_.reset(new aura::Window(NULL));
 535   window_->Init(ui::LAYER_NOT_DRAWN);
 536 }
 537
 538 }  // namespace ash