ash/wm/session_state

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This source file includes following definitions.
GetSlowCloseTransform
GetFastCloseTransform
StartSlowCloseAnimationForWindow
StartUndoSlowCloseAnimationForWindow
StartFastCloseAnimationForWindow
StartPartialFadeAnimation
StartOpacityAnimationForWindow
HideWindowImmediately
RestoreWindow
HideWindow
TransformWindowToBaseState
ShowWindow
StartGrayscaleBrightnessAnimationForWindow
OnLayerAnimationEnded
OnLayerAnimationAborted
OnLayerAnimationScheduled
IsLayerAnimated
ContainersAreAnimated
RootWindowIsAnimated
GetDuration
GetContainers
StartAnimation
StartAnimationWithCallback
StartAnimationWithObserver
StartGlobalAnimation
RunAnimationForWindow
// 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/wm/session_state_animator.h"

#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "ash/wm/window_animations.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/compositor/layer_animation_observer.h"
#include "ui/compositor/layer_animation_sequence.h"
#include "ui/compositor/scoped_layer_animation_settings.h"
#include "ui/views/widget/widget.h"

namespace ash {
namespace {

// Slightly-smaller size that we scale the screen down to for the pre-lock and
// pre-shutdown states.
const float kSlowCloseSizeRatio = 0.95f;

// Maximum opacity of white layer when animating pre-shutdown state.
const float kPartialFadeRatio = 0.3f;

// Minimum size. Not zero as it causes numeric issues.
const float kMinimumScale = 1e-4f;

// Returns the transform that should be applied to containers for the slow-close
// animation.
gfx::Transform GetSlowCloseTransform() {
  gfx::Size root_size = Shell::GetPrimaryRootWindow()->bounds().size();
  gfx::Transform transform;
  transform.Translate(
      floor(0.5 * (1.0 - kSlowCloseSizeRatio) * root_size.width() + 0.5),
      floor(0.5 * (1.0 - kSlowCloseSizeRatio) * root_size.height() + 0.5));
  transform.Scale(kSlowCloseSizeRatio, kSlowCloseSizeRatio);
 return transform;
}

// Returns the transform that should be applied to containers for the fast-close
// animation.
gfx::Transform GetFastCloseTransform() {
  gfx::Size root_size = Shell::GetPrimaryRootWindow()->bounds().size();
  gfx::Transform transform;
  transform.Translate(floor(0.5 * root_size.width() + 0.5),
                      floor(0.5 * root_size.height() + 0.5));
  transform.Scale(kMinimumScale, kMinimumScale);
  return transform;
}

// Slowly shrinks |window| to a slightly-smaller size.
void StartSlowCloseAnimationForWindow(aura::Window* window,
                                      base::TimeDelta duration,
                                      ui::LayerAnimationObserver* observer) {
  ui::LayerAnimator* animator = window->layer()->GetAnimator();
  animator->set_preemption_strategy(
      ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
  ui::LayerAnimationSequence* sequence = new ui::LayerAnimationSequence(
      ui::LayerAnimationElement::CreateTransformElement(
          GetSlowCloseTransform(),
          duration));
  if (observer)
    sequence->AddObserver(observer);
  animator->StartAnimation(sequence);
}

// Quickly undoes the effects of the slow-close animation on |window|.
void StartUndoSlowCloseAnimationForWindow(
    aura::Window* window,
    base::TimeDelta duration,
    ui::LayerAnimationObserver* observer) {
  ui::LayerAnimator* animator = window->layer()->GetAnimator();
  animator->set_preemption_strategy(
      ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
  ui::LayerAnimationSequence* sequence = new ui::LayerAnimationSequence(
      ui::LayerAnimationElement::CreateTransformElement(
          gfx::Transform(),
          duration));
  if (observer)
    sequence->AddObserver(observer);
  animator->StartAnimation(sequence);
}

// Quickly shrinks |window| down to a point in the center of the screen and
// fades it out to 0 opacity.
void StartFastCloseAnimationForWindow(aura::Window* window,
                                      base::TimeDelta duration,
                                      ui::LayerAnimationObserver* observer) {
  ui::LayerAnimator* animator = window->layer()->GetAnimator();
  animator->set_preemption_strategy(
      ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
  animator->StartAnimation(
      new ui::LayerAnimationSequence(
          ui::LayerAnimationElement::CreateTransformElement(
              GetFastCloseTransform(), duration)));
  ui::LayerAnimationSequence* sequence = new ui::LayerAnimationSequence(
      ui::LayerAnimationElement::CreateOpacityElement(0.0, duration));
  if (observer)
    sequence->AddObserver(observer);
  animator->StartAnimation(sequence);
}

// Fades |window| to |target_opacity| over |duration|.
void StartPartialFadeAnimation(aura::Window* window,
                               float target_opacity,
                               base::TimeDelta duration,
                               ui::LayerAnimationObserver* observer) {
  ui::LayerAnimator* animator = window->layer()->GetAnimator();
  animator->set_preemption_strategy(
      ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
  ui::LayerAnimationSequence* sequence = new ui::LayerAnimationSequence(
      ui::LayerAnimationElement::CreateOpacityElement(
          target_opacity, duration));
  if (observer)
    sequence->AddObserver(observer);
  animator->StartAnimation(sequence);
}

// Fades |window| to |opacity| over |duration|.
void StartOpacityAnimationForWindow(aura::Window* window,
                                    float opacity,
                                    base::TimeDelta duration,
                                    ui::LayerAnimationObserver* observer) {
  ui::LayerAnimator* animator = window->layer()->GetAnimator();
  animator->set_preemption_strategy(
      ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
  ui::LayerAnimationSequence* sequence = new ui::LayerAnimationSequence(
      ui::LayerAnimationElement::CreateOpacityElement(opacity, duration));
  if (observer)
    sequence->AddObserver(observer);
  animator->StartAnimation(sequence);
}

// Makes |window| fully transparent instantaneously.
void HideWindowImmediately(aura::Window* window,
                           ui::LayerAnimationObserver* observer) {
  window->layer()->SetOpacity(0.0);
  if (observer)
    observer->OnLayerAnimationEnded(NULL);
}

// Restores |window| to its original position and scale and full opacity
// instantaneously.
void RestoreWindow(aura::Window* window, ui::LayerAnimationObserver* observer) {
  window->layer()->SetTransform(gfx::Transform());
  window->layer()->SetOpacity(1.0);
  if (observer)
    observer->OnLayerAnimationEnded(NULL);
}

void HideWindow(aura::Window* window,
                base::TimeDelta duration,
                bool above,
                ui::LayerAnimationObserver* observer) {
  ui::Layer* layer = window->layer();
  ui::ScopedLayerAnimationSettings settings(layer->GetAnimator());

  settings.SetPreemptionStrategy(
      ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
  settings.SetTransitionDuration(duration);

  settings.SetTweenType(gfx::Tween::EASE_OUT);
  SetTransformForScaleAnimation(layer,
      above ? LAYER_SCALE_ANIMATION_ABOVE : LAYER_SCALE_ANIMATION_BELOW);

  settings.SetTweenType(gfx::Tween::EASE_IN_OUT);
  layer->SetOpacity(0.0f);

  // After the animation completes snap the transform back to the identity,
  // otherwise any one that asks for screen bounds gets a slightly scaled
  // version.
  settings.SetPreemptionStrategy(ui::LayerAnimator::ENQUEUE_NEW_ANIMATION);
  settings.SetTransitionDuration(base::TimeDelta());
  layer->SetTransform(gfx::Transform());

  // A bit of a dirty trick: we need to catch the end of the animation we don't
  // control. So we use two facts we know: which animator will be used and the
  // target opacity to add "Do nothing" animation sequence.
  // Unfortunately, we can not just use empty LayerAnimationSequence, because
  // it does not call NotifyEnded().
  if (observer) {
    ui::LayerAnimationSequence* sequence = new ui::LayerAnimationSequence(
        ui::LayerAnimationElement::CreateOpacityElement(
            0.0, base::TimeDelta()));
      sequence->AddObserver(observer);
    layer->GetAnimator()->ScheduleAnimation(sequence);
  }
}

// Animates |window| to identity transform and full opacity over |duration|.
void TransformWindowToBaseState(aura::Window* window,
                                base::TimeDelta duration,
                                ui::LayerAnimationObserver* observer) {
  ui::Layer* layer = window->layer();
  ui::ScopedLayerAnimationSettings settings(layer->GetAnimator());

  // Animate to target values.
  settings.SetPreemptionStrategy(
      ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
  settings.SetTransitionDuration(duration);

  settings.SetTweenType(gfx::Tween::EASE_OUT);
  layer->SetTransform(gfx::Transform());

  settings.SetTweenType(gfx::Tween::EASE_IN_OUT);
  layer->SetOpacity(1.0f);

  // A bit of a dirty trick: we need to catch the end of the animation we don't
  // control. So we use two facts we know: which animator will be used and the
  // target opacity to add "Do nothing" animation sequence.
  // Unfortunately, we can not just use empty LayerAnimationSequence, because
  // it does not call NotifyEnded().
  if (observer) {
    ui::LayerAnimationSequence* sequence = new ui::LayerAnimationSequence(
        ui::LayerAnimationElement::CreateOpacityElement(
            1.0, base::TimeDelta()));
    sequence->AddObserver(observer);
    layer->GetAnimator()->ScheduleAnimation(sequence);
  }
}

void ShowWindow(aura::Window* window,
                base::TimeDelta duration,
                bool above,
                ui::LayerAnimationObserver* observer) {
  ui::Layer* layer = window->layer();
  ui::ScopedLayerAnimationSettings settings(layer->GetAnimator());

  // Set initial state of animation
  settings.SetPreemptionStrategy(
      ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
  settings.SetTransitionDuration(base::TimeDelta());
  SetTransformForScaleAnimation(layer,
      above ? LAYER_SCALE_ANIMATION_ABOVE : LAYER_SCALE_ANIMATION_BELOW);

  TransformWindowToBaseState(window, duration, observer);
}

// Starts grayscale/brightness animation for |window| over |duration|. Target
// value for both grayscale and brightness are specified by |target|.
void StartGrayscaleBrightnessAnimationForWindow(
    aura::Window* window,
    float target,
    base::TimeDelta duration,
    gfx::Tween::Type tween_type,
    ui::LayerAnimationObserver* observer) {
  ui::LayerAnimator* animator = window->layer()->GetAnimator();

  scoped_ptr<ui::LayerAnimationSequence> brightness_sequence(
      new ui::LayerAnimationSequence());
  scoped_ptr<ui::LayerAnimationSequence> grayscale_sequence(
      new ui::LayerAnimationSequence());

  scoped_ptr<ui::LayerAnimationElement> brightness_element(
      ui::LayerAnimationElement::CreateBrightnessElement(
          target, duration));
  brightness_element->set_tween_type(tween_type);
  brightness_sequence->AddElement(brightness_element.release());

  scoped_ptr<ui::LayerAnimationElement> grayscale_element(
      ui::LayerAnimationElement::CreateGrayscaleElement(
          target, duration));
  grayscale_element->set_tween_type(tween_type);
  grayscale_sequence->AddElement(grayscale_element.release());

  std::vector<ui::LayerAnimationSequence*> animations;
  animations.push_back(brightness_sequence.release());
  animations.push_back(grayscale_sequence.release());

  if (observer)
    animations[0]->AddObserver(observer);

  animator->set_preemption_strategy(
      ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);

  animator->StartTogether(animations);
}

// Animation observer that will drop animated foreground once animation is
// finished. It is used in when undoing shutdown animation.
class CallbackAnimationObserver : public ui::LayerAnimationObserver {
 public:
  explicit CallbackAnimationObserver(base::Callback<void(void)> &callback)
      : callback_(callback) {
  }
  virtual ~CallbackAnimationObserver() {
  }

 private:
  // Overridden from ui::LayerAnimationObserver:
  virtual void OnLayerAnimationEnded(ui::LayerAnimationSequence* seq)
      OVERRIDE {
    // Drop foreground once animation is over.
    callback_.Run();
    delete this;
  }

  virtual void OnLayerAnimationAborted(ui::LayerAnimationSequence* seq)
      OVERRIDE {
    // Drop foreground once animation is over.
    callback_.Run();
    delete this;
  }

  virtual void OnLayerAnimationScheduled(ui::LayerAnimationSequence* seq)
      OVERRIDE {}

  base::Callback<void(void)> callback_;

  DISALLOW_COPY_AND_ASSIGN(CallbackAnimationObserver);
};


bool IsLayerAnimated(ui::Layer* layer,
                     SessionStateAnimator::AnimationType type) {
  switch (type) {
    case SessionStateAnimator::ANIMATION_PARTIAL_CLOSE:
      if (layer->GetTargetTransform() != GetSlowCloseTransform())
        return false;
      break;
    case SessionStateAnimator::ANIMATION_UNDO_PARTIAL_CLOSE:
      if (layer->GetTargetTransform() != gfx::Transform())
        return false;
      break;
    case SessionStateAnimator::ANIMATION_FULL_CLOSE:
      if (layer->GetTargetTransform() != GetFastCloseTransform() ||
          layer->GetTargetOpacity() > 0.0001)
        return false;
      break;
    case SessionStateAnimator::ANIMATION_FADE_IN:
      if (layer->GetTargetOpacity() < 0.9999)
        return false;
      break;
    case SessionStateAnimator::ANIMATION_FADE_OUT:
      if (layer->GetTargetOpacity() > 0.0001)
        return false;
      break;
    case SessionStateAnimator::ANIMATION_HIDE_IMMEDIATELY:
      if (layer->GetTargetOpacity() > 0.0001)
        return false;
      break;
    case SessionStateAnimator::ANIMATION_RESTORE:
      if (layer->opacity() < 0.9999 || layer->transform() != gfx::Transform())
        return false;
      break;
    case SessionStateAnimator::ANIMATION_GRAYSCALE_BRIGHTNESS:
      if ((layer->GetTargetBrightness() < 0.9999) ||
          (layer->GetTargetGrayscale() < 0.9999))
        return false;
      break;
    case SessionStateAnimator::ANIMATION_UNDO_GRAYSCALE_BRIGHTNESS:
      if ((layer->GetTargetBrightness() > 0.0001) ||
          (layer->GetTargetGrayscale() > 0.0001))
        return false;
      break;
    case SessionStateAnimator::ANIMATION_DROP:
    case SessionStateAnimator::ANIMATION_UNDO_LIFT:
      //ToDo(antim) : check other effects
      if (layer->GetTargetOpacity() < 0.9999)
        return false;
      break;
      //ToDo(antim) : check other effects
    case SessionStateAnimator::ANIMATION_LIFT:
      if (layer->GetTargetOpacity() > 0.0001)
        return false;
      break;
    case SessionStateAnimator::ANIMATION_RAISE_TO_SCREEN:
      //ToDo(antim) : check other effects
      if (layer->GetTargetOpacity() < 0.9999)
        return false;
      break;
      //ToDo(antim) : check other effects
    case SessionStateAnimator::ANIMATION_LOWER_BELOW_SCREEN:
      if (layer->GetTargetOpacity() > 0.0001)
        return false;
      break;
    default:
      NOTREACHED() << "Unhandled animation type " << type;
      return false;
  }
  return true;
}

}  // namespace

bool SessionStateAnimator::TestApi::ContainersAreAnimated(
    int container_mask, AnimationType type) const {
  aura::Window::Windows containers;
  animator_->GetContainers(container_mask, &containers);
  for (aura::Window::Windows::const_iterator it = containers.begin();
       it != containers.end(); ++it) {
    aura::Window* window = *it;
    ui::Layer* layer = window->layer();
    if (!IsLayerAnimated(layer, type))
      return false;
  }
  return true;
}

bool SessionStateAnimator::TestApi::RootWindowIsAnimated(AnimationType type)
    const {
  aura::Window* root_window = Shell::GetPrimaryRootWindow();
  ui::Layer* layer = root_window->layer();
  return IsLayerAnimated(layer, type);
}

const int SessionStateAnimator::kAllLockScreenContainersMask =
    SessionStateAnimator::LOCK_SCREEN_BACKGROUND |
    SessionStateAnimator::LOCK_SCREEN_CONTAINERS |
    SessionStateAnimator::LOCK_SCREEN_RELATED_CONTAINERS;

const int SessionStateAnimator::kAllContainersMask =
    SessionStateAnimator::kAllLockScreenContainersMask |
    SessionStateAnimator::DESKTOP_BACKGROUND |
    SessionStateAnimator::LAUNCHER |
    SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS;

SessionStateAnimator::SessionStateAnimator() {
}

SessionStateAnimator::~SessionStateAnimator() {
}

base::TimeDelta SessionStateAnimator::GetDuration(AnimationSpeed speed) {
  switch (speed) {
    case ANIMATION_SPEED_IMMEDIATE:
      return base::TimeDelta();
    case ANIMATION_SPEED_UNDOABLE:
      return base::TimeDelta::FromMilliseconds(400);
    case ANIMATION_SPEED_REVERT:
      return base::TimeDelta::FromMilliseconds(150);
    case ANIMATION_SPEED_FAST:
      return base::TimeDelta::FromMilliseconds(150);
    case ANIMATION_SPEED_SHOW_LOCK_SCREEN:
      return base::TimeDelta::FromMilliseconds(200);
    case ANIMATION_SPEED_MOVE_WINDOWS:
      return base::TimeDelta::FromMilliseconds(350);
    case ANIMATION_SPEED_UNDO_MOVE_WINDOWS:
      return base::TimeDelta::FromMilliseconds(350);
    case ANIMATION_SPEED_SHUTDOWN:
      return base::TimeDelta::FromMilliseconds(1000);
    case ANIMATION_SPEED_REVERT_SHUTDOWN:
      return base::TimeDelta::FromMilliseconds(500);
  }
  // Satisfy compilers that do not understand that we will return from switch
  // above anyway.
  DCHECK(false) << "Unhandled animation speed " << speed;
  return base::TimeDelta();
}

// Fills |containers| with the containers described by |container_mask|.
void SessionStateAnimator::GetContainers(int container_mask,
                                         aura::Window::Windows* containers) {
  aura::Window* root_window = Shell::GetPrimaryRootWindow();
  containers->clear();

  if (container_mask & DESKTOP_BACKGROUND) {
    containers->push_back(Shell::GetContainer(
        root_window, kShellWindowId_DesktopBackgroundContainer));
  }
  if (container_mask & LAUNCHER) {
    containers->push_back(
        Shell::GetContainer(root_window, kShellWindowId_ShelfContainer));
  }
  if (container_mask & NON_LOCK_SCREEN_CONTAINERS) {
    // TODO(antrim): Figure out a way to eliminate a need to exclude launcher
    // in such way.
    aura::Window* non_lock_screen_containers = Shell::GetContainer(
        root_window, kShellWindowId_NonLockScreenContainersContainer);
    aura::Window::Windows children = non_lock_screen_containers->children();

    for (aura::Window::Windows::const_iterator it = children.begin();
         it != children.end(); ++it) {
      aura::Window* window = *it;
      if (window->id() == kShellWindowId_ShelfContainer)
        continue;
      containers->push_back(window);
    }
  }
  if (container_mask & LOCK_SCREEN_BACKGROUND) {
    containers->push_back(Shell::GetContainer(
        root_window, kShellWindowId_LockScreenBackgroundContainer));
  }
  if (container_mask & LOCK_SCREEN_CONTAINERS) {
    containers->push_back(Shell::GetContainer(
        root_window, kShellWindowId_LockScreenContainersContainer));
  }
  if (container_mask & LOCK_SCREEN_RELATED_CONTAINERS) {
    containers->push_back(Shell::GetContainer(
        root_window, kShellWindowId_LockScreenRelatedContainersContainer));
  }
}

void SessionStateAnimator::StartAnimation(int container_mask,
                                          AnimationType type,
                                          AnimationSpeed speed) {
  aura::Window::Windows containers;
  GetContainers(container_mask, &containers);
  for (aura::Window::Windows::const_iterator it = containers.begin();
       it != containers.end(); ++it) {
    RunAnimationForWindow(*it, type, speed, NULL);
  }
}

void SessionStateAnimator::StartAnimationWithCallback(
    int container_mask,
    AnimationType type,
    AnimationSpeed speed,
    base::Callback<void(void)>& callback) {
  aura::Window::Windows containers;
  GetContainers(container_mask, &containers);
  for (aura::Window::Windows::const_iterator it = containers.begin();
       it != containers.end(); ++it) {
    ui::LayerAnimationObserver* observer =
        new CallbackAnimationObserver(callback);
    RunAnimationForWindow(*it, type, speed, observer);
  }
}

void SessionStateAnimator::StartAnimationWithObserver(
    int container_mask,
    AnimationType type,
    AnimationSpeed speed,
    ui::LayerAnimationObserver* observer) {
  aura::Window::Windows containers;
  GetContainers(container_mask, &containers);
  for (aura::Window::Windows::const_iterator it = containers.begin();
       it != containers.end(); ++it) {
    RunAnimationForWindow(*it, type, speed, observer);
  }
}

void SessionStateAnimator::StartGlobalAnimation(AnimationType type,
                                                AnimationSpeed speed) {
  aura::Window* root_window = Shell::GetPrimaryRootWindow();
  RunAnimationForWindow(root_window, type, speed, NULL);
}

void SessionStateAnimator::RunAnimationForWindow(
    aura::Window* window,
    AnimationType type,
    AnimationSpeed speed,
    ui::LayerAnimationObserver* observer) {
  base::TimeDelta duration = GetDuration(speed);

  switch (type) {
    case ANIMATION_PARTIAL_CLOSE:
      StartSlowCloseAnimationForWindow(window, duration, observer);
      break;
    case ANIMATION_UNDO_PARTIAL_CLOSE:
      StartUndoSlowCloseAnimationForWindow(window, duration, observer);
      break;
    case ANIMATION_FULL_CLOSE:
      StartFastCloseAnimationForWindow(window, duration, observer);
      break;
    case ANIMATION_FADE_IN:
      StartOpacityAnimationForWindow(window, 1.0, duration, observer);
      break;
    case ANIMATION_FADE_OUT:
      StartOpacityAnimationForWindow(window, 0.0, duration, observer);
      break;
    case ANIMATION_HIDE_IMMEDIATELY:
      DCHECK_EQ(speed, ANIMATION_SPEED_IMMEDIATE);
      HideWindowImmediately(window, observer);
      break;
    case ANIMATION_RESTORE:
      DCHECK_EQ(speed, ANIMATION_SPEED_IMMEDIATE);
      RestoreWindow(window, observer);
      break;
    case ANIMATION_LIFT:
      HideWindow(window, duration, true, observer);
      break;
    case ANIMATION_DROP:
      ShowWindow(window, duration, true, observer);
      break;
    case ANIMATION_UNDO_LIFT:
      TransformWindowToBaseState(window, duration, observer);
      break;
    case ANIMATION_RAISE_TO_SCREEN:
      ShowWindow(window, duration, false, observer);
      break;
    case ANIMATION_LOWER_BELOW_SCREEN:
      HideWindow(window, duration, false, observer);
      break;
    case ANIMATION_PARTIAL_FADE_IN:
      StartPartialFadeAnimation(
          window, kPartialFadeRatio, duration, observer);
      break;
    case ANIMATION_UNDO_PARTIAL_FADE_IN:
      StartPartialFadeAnimation(window, 0.0, duration, observer);
      break;
    case ANIMATION_FULL_FADE_IN:
      StartPartialFadeAnimation(window, 1.0, duration, observer);
      break;
    case ANIMATION_GRAYSCALE_BRIGHTNESS:
      StartGrayscaleBrightnessAnimationForWindow(
          window, 1.0, duration, gfx::Tween::EASE_IN, observer);
      break;
    case ANIMATION_UNDO_GRAYSCALE_BRIGHTNESS:
      StartGrayscaleBrightnessAnimationForWindow(
          window, 0.0, duration, gfx::Tween::EASE_IN_OUT, observer);
      break;
  }
}

}  // namespace ash
/* [<][>][^][v][top][bottom][index][help] */
root/ash/wm/session_state_animator.cc

DEFINITIONS
