src/ash/wm/window_animations.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/wm/window_animations.h"
   6
   7 #include <math.h>
   8
   9 #include <algorithm>
  10 #include <vector>
  11
  12 #include "ash/screen_util.h"
  13 #include "ash/shelf/shelf.h"
  14 #include "ash/shelf/shelf_layout_manager.h"
  15 #include "ash/shelf/shelf_widget.h"
  16 #include "ash/shell.h"
  17 #include "ash/wm/window_util.h"
  18 #include "ash/wm/workspace_controller.h"
  19 #include "base/command_line.h"
  20 #include "base/compiler_specific.h"
  21 #include "base/logging.h"
  22 #include "base/message_loop/message_loop.h"
  23 #include "base/stl_util.h"
  24 #include "base/time/time.h"
  25 #include "ui/aura/client/aura_constants.h"
  26 #include "ui/aura/window.h"
  27 #include "ui/aura/window_observer.h"
  28 #include "ui/aura/window_property.h"
  29 #include "ui/compositor/compositor_observer.h"
  30 #include "ui/compositor/layer.h"
  31 #include "ui/compositor/layer_animation_observer.h"
  32 #include "ui/compositor/layer_animation_sequence.h"
  33 #include "ui/compositor/layer_animator.h"
  34 #include "ui/compositor/scoped_layer_animation_settings.h"
  35 #include "ui/gfx/interpolated_transform.h"
  36 #include "ui/gfx/screen.h"
  37 #include "ui/gfx/vector3d_f.h"
  38 #include "ui/views/corewm/window_util.h"
  39 #include "ui/views/view.h"
  40 #include "ui/views/widget/widget.h"
  41
  42 namespace ash {
  43 namespace {
  44 const int kLayerAnimationsForMinimizeDurationMS = 200;
  45
  46 // Durations for the cross-fade animation, in milliseconds.
  47 const float kCrossFadeDurationMinMs = 200.f;
  48 const float kCrossFadeDurationMaxMs = 400.f;
  49
  50 // Durations for the brightness/grayscale fade animation, in milliseconds.
  51 const int kBrightnessGrayscaleFadeDurationMs = 1000;
  52
  53 // Brightness/grayscale values for hide/show window animations.
  54 const float kWindowAnimation_HideBrightnessGrayscale = 1.f;
  55 const float kWindowAnimation_ShowBrightnessGrayscale = 0.f;
  56
  57 const float kWindowAnimation_HideOpacity = 0.f;
  58 const float kWindowAnimation_ShowOpacity = 1.f;
  59 // TODO(sky): if we end up sticking with 0, nuke the code doing the rotation.
  60 const float kWindowAnimation_MinimizeRotate = 0.f;
  61
  62 // Scales for AshWindow above/below current workspace.
  63 const float kLayerScaleAboveSize = 1.1f;
  64 const float kLayerScaleBelowSize = .9f;
  65
  66 int64 Round64(float f) {
  67   return static_cast<int64>(f + 0.5f);
  68 }
  69
  70 }  // namespace
  71
  72 const int kCrossFadeDurationMS = 200;
  73
  74 void AddLayerAnimationsForMinimize(aura::Window* window, bool show) {
  75   // Recalculate the transform at restore time since the launcher item may have
  76   // moved while the window was minimized.
  77   gfx::Rect bounds = window->bounds();
  78   gfx::Rect target_bounds = GetMinimizeAnimationTargetBoundsInScreen(window);
  79   target_bounds =
  80       ScreenUtil::ConvertRectFromScreen(window->parent(), target_bounds);
  81
  82   float scale_x = static_cast<float>(target_bounds.width()) / bounds.width();
  83   float scale_y = static_cast<float>(target_bounds.height()) / bounds.height();
  84
  85   scoped_ptr<ui::InterpolatedTransform> scale(
  86       new ui::InterpolatedScale(gfx::Point3F(1, 1, 1),
  87                                 gfx::Point3F(scale_x, scale_y, 1)));
  88
  89   scoped_ptr<ui::InterpolatedTransform> translation(
  90       new ui::InterpolatedTranslation(
  91           gfx::Point(),
  92           gfx::Point(target_bounds.x() - bounds.x(),
  93                      target_bounds.y() - bounds.y())));
  94
  95   scoped_ptr<ui::InterpolatedTransform> rotation(
  96       new ui::InterpolatedRotation(0, kWindowAnimation_MinimizeRotate));
  97
  98   scoped_ptr<ui::InterpolatedTransform> rotation_about_pivot(
  99       new ui::InterpolatedTransformAboutPivot(
 100           gfx::Point(bounds.width() * 0.5, bounds.height() * 0.5),
 101           rotation.release()));
 102
 103   scale->SetChild(translation.release());
 104   rotation_about_pivot->SetChild(scale.release());
 105
 106   rotation_about_pivot->SetReversed(show);
 107
 108   base::TimeDelta duration = window->layer()->GetAnimator()->
 109       GetTransitionDuration();
 110
 111   scoped_ptr<ui::LayerAnimationElement> transition(
 112       ui::LayerAnimationElement::CreateInterpolatedTransformElement(
 113           rotation_about_pivot.release(), duration));
 114
 115   transition->set_tween_type(
 116       show ? gfx::Tween::EASE_IN : gfx::Tween::EASE_IN_OUT);
 117
 118   window->layer()->GetAnimator()->ScheduleAnimation(
 119       new ui::LayerAnimationSequence(transition.release()));
 120
 121   // When hiding a window, turn off blending until the animation is 3 / 4 done
 122   // to save bandwidth and reduce jank.
 123   if (!show) {
 124     window->layer()->GetAnimator()->SchedulePauseForProperties(
 125         (duration * 3) / 4, ui::LayerAnimationElement::OPACITY);
 126   }
 127
 128   // Fade in and out quickly when the window is small to reduce jank.
 129   float opacity = show ? 1.0f : 0.0f;
 130   window->layer()->GetAnimator()->ScheduleAnimation(
 131       new ui::LayerAnimationSequence(
 132           ui::LayerAnimationElement::CreateOpacityElement(
 133               opacity, duration / 4)));
 134 }
 135
 136 void AnimateShowWindow_Minimize(aura::Window* window) {
 137   window->layer()->set_delegate(window);
 138   window->layer()->SetOpacity(kWindowAnimation_HideOpacity);
 139   ui::ScopedLayerAnimationSettings settings(window->layer()->GetAnimator());
 140   base::TimeDelta duration = base::TimeDelta::FromMilliseconds(
 141       kLayerAnimationsForMinimizeDurationMS);
 142   settings.SetTransitionDuration(duration);
 143   AddLayerAnimationsForMinimize(window, true);
 144
 145   // Now that the window has been restored, we need to clear its animation style
 146   // to default so that normal animation applies.
 147   views::corewm::SetWindowVisibilityAnimationType(
 148       window, views::corewm::WINDOW_VISIBILITY_ANIMATION_TYPE_DEFAULT);
 149 }
 150
 151 void AnimateHideWindow_Minimize(aura::Window* window) {
 152   window->layer()->set_delegate(NULL);
 153
 154   // Property sets within this scope will be implicitly animated.
 155   ui::ScopedLayerAnimationSettings settings(window->layer()->GetAnimator());
 156   base::TimeDelta duration = base::TimeDelta::FromMilliseconds(
 157       kLayerAnimationsForMinimizeDurationMS);
 158   settings.SetTransitionDuration(duration);
 159   settings.AddObserver(
 160       views::corewm::CreateHidingWindowAnimationObserver(window));
 161   window->layer()->SetVisible(false);
 162
 163   AddLayerAnimationsForMinimize(window, false);
 164 }
 165
 166 void AnimateShowHideWindowCommon_BrightnessGrayscale(aura::Window* window,
 167                                                      bool show) {
 168   window->layer()->set_delegate(window);
 169
 170   float start_value, end_value;
 171   if (show) {
 172     start_value = kWindowAnimation_HideBrightnessGrayscale;
 173     end_value = kWindowAnimation_ShowBrightnessGrayscale;
 174   } else {
 175     start_value = kWindowAnimation_ShowBrightnessGrayscale;
 176     end_value = kWindowAnimation_HideBrightnessGrayscale;
 177   }
 178
 179   window->layer()->SetLayerBrightness(start_value);
 180   window->layer()->SetLayerGrayscale(start_value);
 181   if (show) {
 182     window->layer()->SetOpacity(kWindowAnimation_ShowOpacity);
 183     window->layer()->SetVisible(true);
 184   }
 185
 186   base::TimeDelta duration =
 187       base::TimeDelta::FromMilliseconds(kBrightnessGrayscaleFadeDurationMs);
 188
 189   ui::ScopedLayerAnimationSettings settings(window->layer()->GetAnimator());
 190   settings.SetTransitionDuration(duration);
 191   if (!show) {
 192     settings.AddObserver(
 193         views::corewm::CreateHidingWindowAnimationObserver(window));
 194   }
 195
 196   window->layer()->GetAnimator()->
 197       ScheduleTogether(
 198           CreateBrightnessGrayscaleAnimationSequence(end_value, duration));
 199   if (!show) {
 200     window->layer()->SetOpacity(kWindowAnimation_HideOpacity);
 201     window->layer()->SetVisible(false);
 202   }
 203 }
 204
 205 void AnimateShowWindow_BrightnessGrayscale(aura::Window* window) {
 206   AnimateShowHideWindowCommon_BrightnessGrayscale(window, true);
 207 }
 208
 209 void AnimateHideWindow_BrightnessGrayscale(aura::Window* window) {
 210   AnimateShowHideWindowCommon_BrightnessGrayscale(window, false);
 211 }
 212
 213 bool AnimateShowWindow(aura::Window* window) {
 214   if (!views::corewm::HasWindowVisibilityAnimationTransition(
 215           window, views::corewm::ANIMATE_SHOW)) {
 216     return false;
 217   }
 218
 219   switch (views::corewm::GetWindowVisibilityAnimationType(window)) {
 220     case WINDOW_VISIBILITY_ANIMATION_TYPE_MINIMIZE:
 221       AnimateShowWindow_Minimize(window);
 222       return true;
 223     case WINDOW_VISIBILITY_ANIMATION_TYPE_BRIGHTNESS_GRAYSCALE:
 224       AnimateShowWindow_BrightnessGrayscale(window);
 225       return true;
 226     default:
 227       NOTREACHED();
 228       return false;
 229   }
 230 }
 231
 232 bool AnimateHideWindow(aura::Window* window) {
 233   if (!views::corewm::HasWindowVisibilityAnimationTransition(
 234           window, views::corewm::ANIMATE_HIDE)) {
 235     return false;
 236   }
 237
 238   switch (views::corewm::GetWindowVisibilityAnimationType(window)) {
 239     case WINDOW_VISIBILITY_ANIMATION_TYPE_MINIMIZE:
 240       AnimateHideWindow_Minimize(window);
 241       return true;
 242     case WINDOW_VISIBILITY_ANIMATION_TYPE_BRIGHTNESS_GRAYSCALE:
 243       AnimateHideWindow_BrightnessGrayscale(window);
 244       return true;
 245     default:
 246       NOTREACHED();
 247       return false;
 248   }
 249 }
 250
 251 // Observer for a window cross-fade animation. If either the window closes or
 252 // the layer's animation completes or compositing is aborted due to GPU crash,
 253 // it deletes the layer and removes itself as an observer.
 254 class CrossFadeObserver : public ui::CompositorObserver,
 255                           public aura::WindowObserver,
 256                           public ui::ImplicitAnimationObserver {
 257  public:
 258   // Observes |window| for destruction, but does not take ownership.
 259   // Takes ownership of |layer| and its child layers.
 260   CrossFadeObserver(aura::Window* window, ui::Layer* layer)
 261       : window_(window),
 262         layer_(layer) {
 263     window_->AddObserver(this);
 264     layer_->GetCompositor()->AddObserver(this);
 265   }
 266   virtual ~CrossFadeObserver() {
 267     window_->RemoveObserver(this);
 268     window_ = NULL;
 269     layer_->GetCompositor()->RemoveObserver(this);
 270     views::corewm::DeepDeleteLayers(layer_);
 271     layer_ = NULL;
 272   }
 273
 274   // ui::CompositorObserver overrides:
 275   virtual void OnCompositingDidCommit(ui::Compositor* compositor) OVERRIDE {
 276   }
 277   virtual void OnCompositingStarted(ui::Compositor* compositor,
 278                                     base::TimeTicks start_time) OVERRIDE {
 279   }
 280   virtual void OnCompositingEnded(ui::Compositor* compositor) OVERRIDE {
 281   }
 282   virtual void OnCompositingAborted(ui::Compositor* compositor) OVERRIDE {
 283     // Triggers OnImplicitAnimationsCompleted() to be called and deletes us.
 284     layer_->GetAnimator()->StopAnimating();
 285   }
 286   virtual void OnCompositingLockStateChanged(
 287       ui::Compositor* compositor) OVERRIDE {
 288   }
 289
 290   // aura::WindowObserver overrides:
 291   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {
 292     // Triggers OnImplicitAnimationsCompleted() to be called and deletes us.
 293     layer_->GetAnimator()->StopAnimating();
 294   }
 295   virtual void OnWindowRemovingFromRootWindow(aura::Window* window) OVERRIDE {
 296     layer_->GetAnimator()->StopAnimating();
 297   }
 298
 299   // ui::ImplicitAnimationObserver overrides:
 300   virtual void OnImplicitAnimationsCompleted() OVERRIDE {
 301     delete this;
 302   }
 303
 304  private:
 305   aura::Window* window_;  // not owned
 306   ui::Layer* layer_;  // owned
 307
 308   DISALLOW_COPY_AND_ASSIGN(CrossFadeObserver);
 309 };
 310
 311 // Implementation of cross fading. Window is the window being cross faded. It
 312 // should be at the target bounds. |old_layer| the previous layer from |window|.
 313 // This takes ownership of |old_layer| and deletes when the animation is done.
 314 // |pause_duration| is the duration to pause at the current bounds before
 315 // animating. Returns the duration of the fade.
 316 base::TimeDelta CrossFadeImpl(aura::Window* window,
 317                               ui::Layer* old_layer,
 318                               gfx::Tween::Type tween_type) {
 319   const gfx::Rect old_bounds(old_layer->bounds());
 320   const gfx::Rect new_bounds(window->bounds());
 321   const bool old_on_top = (old_bounds.width() > new_bounds.width());
 322
 323   // Shorten the animation if there's not much visual movement.
 324   const base::TimeDelta duration = GetCrossFadeDuration(window,
 325                                                         old_bounds, new_bounds);
 326
 327   // Scale up the old layer while translating to new position.
 328   {
 329     old_layer->GetAnimator()->StopAnimating();
 330     ui::ScopedLayerAnimationSettings settings(old_layer->GetAnimator());
 331
 332     // Animation observer owns the old layer and deletes itself.
 333     settings.AddObserver(new CrossFadeObserver(window, old_layer));
 334     settings.SetTransitionDuration(duration);
 335     settings.SetTweenType(tween_type);
 336     gfx::Transform out_transform;
 337     float scale_x = static_cast<float>(new_bounds.width()) /
 338         static_cast<float>(old_bounds.width());
 339     float scale_y = static_cast<float>(new_bounds.height()) /
 340         static_cast<float>(old_bounds.height());
 341     out_transform.Translate(new_bounds.x() - old_bounds.x(),
 342                             new_bounds.y() - old_bounds.y());
 343     out_transform.Scale(scale_x, scale_y);
 344     old_layer->SetTransform(out_transform);
 345     if (old_on_top) {
 346       // The old layer is on top, and should fade out.  The new layer below will
 347       // stay opaque to block the desktop.
 348       old_layer->SetOpacity(kWindowAnimation_HideOpacity);
 349     }
 350     // In tests |old_layer| is deleted here, as animations have zero duration.
 351     old_layer = NULL;
 352   }
 353
 354   // Set the new layer's current transform, such that the user sees a scaled
 355   // version of the window with the original bounds at the original position.
 356   gfx::Transform in_transform;
 357   const float scale_x = static_cast<float>(old_bounds.width()) /
 358       static_cast<float>(new_bounds.width());
 359   const float scale_y = static_cast<float>(old_bounds.height()) /
 360       static_cast<float>(new_bounds.height());
 361   in_transform.Translate(old_bounds.x() - new_bounds.x(),
 362                                old_bounds.y() - new_bounds.y());
 363   in_transform.Scale(scale_x, scale_y);
 364   window->layer()->SetTransform(in_transform);
 365   if (!old_on_top) {
 366     // The new layer is on top and should fade in.  The old layer below will
 367     // stay opaque and block the desktop.
 368     window->layer()->SetOpacity(kWindowAnimation_HideOpacity);
 369   }
 370   {
 371     // Animate the new layer to the identity transform, so the window goes to
 372     // its newly set bounds.
 373     ui::ScopedLayerAnimationSettings settings(window->layer()->GetAnimator());
 374     settings.SetTransitionDuration(duration);
 375     settings.SetTweenType(tween_type);
 376     window->layer()->SetTransform(gfx::Transform());
 377     if (!old_on_top) {
 378       // New layer is on top, fade it in.
 379       window->layer()->SetOpacity(kWindowAnimation_ShowOpacity);
 380     }
 381   }
 382   return duration;
 383 }
 384
 385 void CrossFadeToBounds(aura::Window* window, const gfx::Rect& new_bounds) {
 386   // Some test results in invoking CrossFadeToBounds when window is not visible.
 387   // No animation is necessary in that case, thus just change the bounds and
 388   // quit.
 389   if (!window->TargetVisibility()) {
 390     window->SetBounds(new_bounds);
 391     return;
 392   }
 393
 394   const gfx::Rect old_bounds = window->bounds();
 395
 396   // Create fresh layers for the window and all its children to paint into.
 397   // Takes ownership of the old layer and all its children, which will be
 398   // cleaned up after the animation completes.
 399   // Specify |set_bounds| to true here to keep the old bounds in the child
 400   // windows of |window|.
 401   ui::Layer* old_layer = views::corewm::RecreateWindowLayers(window, true);
 402   ui::Layer* new_layer = window->layer();
 403
 404   // Resize the window to the new size, which will force a layout and paint.
 405   window->SetBounds(new_bounds);
 406
 407   // Ensure the higher-resolution layer is on top.
 408   bool old_on_top = (old_bounds.width() > new_bounds.width());
 409   if (old_on_top)
 410     old_layer->parent()->StackBelow(new_layer, old_layer);
 411   else
 412     old_layer->parent()->StackAbove(new_layer, old_layer);
 413
 414   CrossFadeImpl(window, old_layer, gfx::Tween::EASE_OUT);
 415 }
 416
 417 base::TimeDelta GetCrossFadeDuration(aura::Window* window,
 418                                      const gfx::Rect& old_bounds,
 419                                      const gfx::Rect& new_bounds) {
 420   if (views::corewm::WindowAnimationsDisabled(window))
 421     return base::TimeDelta();
 422
 423   int old_area = old_bounds.width() * old_bounds.height();
 424   int new_area = new_bounds.width() * new_bounds.height();
 425   int max_area = std::max(old_area, new_area);
 426   // Avoid divide by zero.
 427   if (max_area == 0)
 428     return base::TimeDelta::FromMilliseconds(kCrossFadeDurationMS);
 429
 430   int delta_area = std::abs(old_area - new_area);
 431   // If the area didn't change, the animation is instantaneous.
 432   if (delta_area == 0)
 433     return base::TimeDelta::FromMilliseconds(kCrossFadeDurationMS);
 434
 435   float factor =
 436       static_cast<float>(delta_area) / static_cast<float>(max_area);
 437   const float kRange = kCrossFadeDurationMaxMs - kCrossFadeDurationMinMs;
 438   return base::TimeDelta::FromMilliseconds(
 439       Round64(kCrossFadeDurationMinMs + (factor * kRange)));
 440 }
 441
 442 bool AnimateOnChildWindowVisibilityChanged(aura::Window* window, bool visible) {
 443   if (views::corewm::WindowAnimationsDisabled(window))
 444     return false;
 445
 446   // Attempt to run CoreWm supplied animation types.
 447   if (views::corewm::AnimateOnChildWindowVisibilityChanged(window, visible))
 448     return true;
 449
 450   // Otherwise try to run an Ash-specific animation.
 451   if (visible)
 452     return AnimateShowWindow(window);
 453   // Don't start hiding the window again if it's already being hidden.
 454   return window->layer()->GetTargetOpacity() != 0.0f &&
 455       AnimateHideWindow(window);
 456 }
 457
 458 std::vector<ui::LayerAnimationSequence*>
 459 CreateBrightnessGrayscaleAnimationSequence(float target_value,
 460                                            base::TimeDelta duration) {
 461   gfx::Tween::Type animation_type = gfx::Tween::EASE_OUT;
 462   scoped_ptr<ui::LayerAnimationSequence> brightness_sequence(
 463       new ui::LayerAnimationSequence());
 464   scoped_ptr<ui::LayerAnimationSequence> grayscale_sequence(
 465       new ui::LayerAnimationSequence());
 466
 467   scoped_ptr<ui::LayerAnimationElement> brightness_element(
 468       ui::LayerAnimationElement::CreateBrightnessElement(
 469           target_value, duration));
 470   brightness_element->set_tween_type(animation_type);
 471   brightness_sequence->AddElement(brightness_element.release());
 472
 473   scoped_ptr<ui::LayerAnimationElement> grayscale_element(
 474       ui::LayerAnimationElement::CreateGrayscaleElement(
 475           target_value, duration));
 476   grayscale_element->set_tween_type(animation_type);
 477   grayscale_sequence->AddElement(grayscale_element.release());
 478
 479   std::vector<ui::LayerAnimationSequence*> animations;
 480   animations.push_back(brightness_sequence.release());
 481   animations.push_back(grayscale_sequence.release());
 482
 483   return animations;
 484 }
 485
 486 // Returns scale related to the specified AshWindowScaleType.
 487 void SetTransformForScaleAnimation(ui::Layer* layer,
 488                                    LayerScaleAnimationDirection type) {
 489   const float scale =
 490       type == LAYER_SCALE_ANIMATION_ABOVE ? kLayerScaleAboveSize :
 491           kLayerScaleBelowSize;
 492   gfx::Transform transform;
 493   transform.Translate(-layer->bounds().width() * (scale - 1.0f) / 2,
 494                       -layer->bounds().height() * (scale - 1.0f) / 2);
 495   transform.Scale(scale, scale);
 496   layer->SetTransform(transform);
 497 }
 498
 499 gfx::Rect GetMinimizeAnimationTargetBoundsInScreen(aura::Window* window) {
 500   Shelf* shelf = Shelf::ForWindow(window);
 501   // Shelf is created lazily and can be NULL.
 502   if (!shelf)
 503     return gfx::Rect();
 504   gfx::Rect item_rect = shelf->GetScreenBoundsOfItemIconForWindow(window);
 505
 506   // The launcher item is visible and has an icon.
 507   if (!item_rect.IsEmpty())
 508     return item_rect;
 509
 510   // If both the icon width and height are 0, then there is no icon in the
 511   // launcher for |window| or the icon is hidden in the overflow menu. If the
 512   // launcher is auto hidden, one of the height or width will be 0 but the
 513   // position in the launcher and the major dimension are still reported
 514   // correctly and the window can be animated to the launcher item's light
 515   // bar.
 516   if (item_rect.width() != 0 || item_rect.height() != 0) {
 517     internal::ShelfLayoutManager* layout_manager =
 518         internal::ShelfLayoutManager::ForShelf(window);
 519     if (layout_manager->visibility_state() == SHELF_AUTO_HIDE) {
 520       gfx::Rect shelf_bounds = shelf->shelf_widget()->GetWindowBoundsInScreen();
 521       switch (layout_manager->GetAlignment()) {
 522         case SHELF_ALIGNMENT_BOTTOM:
 523           item_rect.set_y(shelf_bounds.y());
 524           break;
 525         case SHELF_ALIGNMENT_LEFT:
 526           item_rect.set_x(shelf_bounds.right());
 527           break;
 528         case SHELF_ALIGNMENT_RIGHT:
 529           item_rect.set_x(shelf_bounds.x());
 530           break;
 531         case SHELF_ALIGNMENT_TOP:
 532           item_rect.set_y(shelf_bounds.bottom());
 533           break;
 534       }
 535       return item_rect;
 536     }
 537   }
 538
 539   // Assume the shelf is overflowed, zoom off to the bottom right of the
 540   // work area.
 541   gfx::Rect work_area =
 542       Shell::GetScreen()->GetDisplayNearestWindow(window).work_area();
 543   return gfx::Rect(work_area.right(), work_area.bottom(), 0, 0);
 544 }
 545
 546 }  // namespace ash