chromium/ui/compositor/layer_animator.h

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_COMPOSITOR_LAYER_ANIMATOR_H_
#define UI_COMPOSITOR_LAYER_ANIMATOR_H_

#include <vector>

#include "base/callback_list.h"
#include "base/containers/circular_deque.h"
#include "base/functional/callback.h"
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/time/time.h"
#include "cc/animation/animation_delegate.h"
#include "cc/trees/target_property.h"
#include "ui/compositor/compositor_export.h"
#include "ui/compositor/layer_animation_element.h"
#include "ui/compositor/layer_threaded_animation_delegate.h"
#include "ui/gfx/animation/tween.h"
#include "ui/gfx/geometry/linear_gradient.h"

namespace cc {
class Animation;
class AnimationTimeline;
class Layer;
}

namespace gfx {
class AnimationCurve;
class Rect;
class Transform;
}

namespace ui {
class Compositor;
class ImplicitAnimationObserver;
class LayerAnimationSequence;
class LayerAnimationDelegate;
class LayerAnimationObserver;
class LayerAnimatorCollection;
class ScopedLayerAnimationSettings;

// When a property of layer needs to be changed it is set by way of
// LayerAnimator. This enables LayerAnimator to animate property changes.
// NB: during many tests, set_disable_animations_for_test is used and causes
// all animations to complete immediately. The layer animation is ref counted
// so that if its owning layer is deleted (and the owning layer is only other
// class that should ever hold a ref ptr to a LayerAnimator), the animator can
// ensure that it is not disposed of until it finishes executing. It does this
// by holding a reference to itself for the duration of methods for which it
// must guarantee that |this| is valid.
class COMPOSITOR_EXPORT LayerAnimator : public base::RefCounted<LayerAnimator>,
                                        public LayerThreadedAnimationDelegate,
                                        public cc::AnimationDelegate { … };

}  // namespace ui

#endif  // UI_COMPOSITOR_LAYER_ANIMATOR_H_