ui: Move compositor/ directory out of gfx/, up to ui/.

ui/gfx/compositor/layer_animation_sequence.h

-// 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.
-
-#ifndef UI_GFX_COMPOSITOR_LAYER_ANIMATION_SEQUENCE_H_
-#define UI_GFX_COMPOSITOR_LAYER_ANIMATION_SEQUENCE_H_
-#pragma once
-
-#include <vector>
-
-#include "base/gtest_prod_util.h"
-#include "base/memory/linked_ptr.h"
-#include "base/observer_list.h"
-#include "base/time.h"
-#include "ui/gfx/compositor/compositor_export.h"
-#include "ui/gfx/compositor/layer_animation_element.h"
-
-namespace ui {
-
-class LayerAnimationDelegate;
-class LayerAnimationObserver;
-
-// Contains a collection of layer animation elements to be played one after
-// another. Although it has a similar interface to LayerAnimationElement, it is
-// not a LayerAnimationElement (i.e., it is not permitted to have a sequence in
-// a sequence). Sequences own their elements, and sequences are themselves owned
-// by a LayerAnimator.
-//
-// TODO(vollick) Create a 'blended' sequence for transitioning between
-// sequences.
-class COMPOSITOR_EXPORT LayerAnimationSequence {
- public:
-  LayerAnimationSequence();
-  // Takes ownership of the given element and adds it to the sequence.
-  explicit LayerAnimationSequence(LayerAnimationElement* element);
-  virtual ~LayerAnimationSequence();
-
-  // Updates the delegate to the appropriate value for |elapsed|, which is in
-  // the range [0, Duration()].  If the animation is not aborted, it is
-  // guaranteed that Animate will be called with elapsed = Duration().
-  // Returns true if a redraw is required.
-  bool Progress(base::TimeDelta elapsed, LayerAnimationDelegate* delegate);
-
-  // Sets the target value to the value that would have been set had
-  // the sequence completed. Does nothing if the sequence is cyclic.
-  void GetTargetValue(LayerAnimationElement::TargetValue* target) const;
-
-  // Aborts the given animation.
-  void Abort();
-
-  // All properties modified by the sequence.
-  const LayerAnimationElement::AnimatableProperties& properties() const {
-    return properties_;
-  }
-
-  // The total, finite duration of one cycle of the sequence.
-  base::TimeDelta duration() const {
-    return duration_;
-  }
-
-  // Adds an element to the sequence. The sequences takes ownership of this
-  // element.
-  void AddElement(LayerAnimationElement* element);
-
-  // Sequences can be looped indefinitely.
-  void set_is_cyclic(bool is_cyclic) { is_cyclic_ = is_cyclic; }
-  bool is_cyclic() const { return is_cyclic_; }
-
-  // Returns true if this sequence has at least one element affecting a
-  // property in |other|.
-  bool HasCommonProperty(
-      const LayerAnimationElement::AnimatableProperties& other) const;
-
-  // These functions are used for adding or removing observers from the observer
-  // list. The observers are notified when animations end.
-  void AddObserver(LayerAnimationObserver* observer);
-  void RemoveObserver(LayerAnimationObserver* observer);
-
-  // Called when the animator schedules this sequence.
-  void OnScheduled();
-
-  // Called when the animator is destroyed.
-  void OnAnimatorDestroyed();
-
- private:
-  typedef std::vector<linked_ptr<LayerAnimationElement> > Elements;
-
-  FRIEND_TEST_ALL_PREFIXES(LayerAnimatorTest,
-                           ObserverReleasedBeforeAnimationSequenceEnds);
-
-  // Notifies the observers that this sequence has been scheduled.
-  void NotifyScheduled();
-
-  // Notifies the observers that this sequence has ended.
-  void NotifyEnded();
-
-  // Notifies the observers that this sequence has been aborted.
-  void NotifyAborted();
-
-  // The sum of the durations of all the elements in the sequence.
-  base::TimeDelta duration_;
-
-  // The union of all the properties modified by all elements in the sequence.
-  LayerAnimationElement::AnimatableProperties properties_;
-
-  // The elements in the sequence.
-  Elements elements_;
-
-  // True if the sequence should be looped forever.
-  bool is_cyclic_;
-
-  // These are used when animating to efficiently find the next element.
-  size_t last_element_;
-  base::TimeDelta last_start_;
-
-  // These parties are notified when layer animations end.
-  ObserverList<LayerAnimationObserver> observers_;
-
-  DISALLOW_COPY_AND_ASSIGN(LayerAnimationSequence);
-};
-
-}  // namespace ui
-
-#endif  // UI_GFX_COMPOSITOR_LAYER_ANIMATION_SEQUENCE_H_