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

ui/gfx/compositor/layer_animation_element.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_ELEMENT_H_
-#define UI_GFX_COMPOSITOR_LAYER_ANIMATION_ELEMENT_H_
-#pragma once
-
-#include <set>
-
-#include "base/time.h"
-#include "ui/base/animation/tween.h"
-#include "ui/gfx/compositor/compositor_export.h"
-#include "ui/gfx/rect.h"
-#include "ui/gfx/transform.h"
-
-namespace ui {
-
-class InterpolatedTransform;
-class LayerAnimationDelegate;
-class Transform;
-
-// LayerAnimationElements represent one segment of an animation between two
-// keyframes. They know how to update a LayerAnimationDelegate given a value
-// between 0 and 1 (0 for initial, and 1 for final).
-class COMPOSITOR_EXPORT LayerAnimationElement {
- public:
-  enum AnimatableProperty {
-    TRANSFORM = 0,
-    BOUNDS,
-    OPACITY,
-    VISIBILITY
-  };
-
-  struct COMPOSITOR_EXPORT TargetValue {
-    TargetValue();
-    // Initializes the target value to match the delegate. NULL may be supplied.
-    explicit TargetValue(const LayerAnimationDelegate* delegate);
-
-    gfx::Rect bounds;
-    Transform transform;
-    float opacity;
-    bool visibility;
-  };
-
-  typedef std::set<AnimatableProperty> AnimatableProperties;
-
-  LayerAnimationElement(const AnimatableProperties& properties,
-                        base::TimeDelta duration);
-  virtual ~LayerAnimationElement();
-
-  // Creates an element that transitions to the given transform. The caller owns
-  // the return value.
-  static LayerAnimationElement* CreateTransformElement(
-      const Transform& transform,
-      base::TimeDelta duration);
-
-  // Creates an element that transitions to another in a way determined by an
-  // interpolated transform. The element accepts ownership of the interpolated
-  // transform. NB: at every step, the interpolated transform clobbers the
-  // existing transform. That is, it does not interpolate between the existing
-  // transform and the last value the interpolated transform will assume. It is
-  // therefore important that the value of the interpolated at time 0 matches
-  // the current transform.
-  static LayerAnimationElement* CreateInterpolatedTransformElement(
-      InterpolatedTransform* interpolated_transform,
-      base::TimeDelta duration);
-
-  // Creates an element that transitions to the given bounds. The caller owns
-  // the return value.
-  static LayerAnimationElement* CreateBoundsElement(
-      const gfx::Rect& bounds,
-      base::TimeDelta duration);
-
-  // Creates an element that transitions to the given opacity. The caller owns
-  // the return value.
-  static LayerAnimationElement* CreateOpacityElement(
-      float opacity,
-      base::TimeDelta duration);
-
-  // Creates an element that sets visibily following a delay. The caller owns
-  // the return value.
-  static LayerAnimationElement* CreateVisibilityElement(
-      bool visibility,
-      base::TimeDelta duration);
-
-  // Creates an element that pauses the given properties. The caller owns the
-  // return value.
-  static LayerAnimationElement* CreatePauseElement(
-      const AnimatableProperties& properties,
-      base::TimeDelta duration);
-
-  // Updates the delegate to the appropriate value for |t|, which is in the
-  // range [0, 1] (0 for initial, and 1 for final). If the animation is not
-  // aborted, it is guaranteed that Progress will eventually be called with
-  // t = 1.0. Returns true if a redraw is required.
-  bool Progress(double t, LayerAnimationDelegate* delegate);
-
-  // Called if the animation is not allowed to complete. This may be called
-  // before OnStarted or Progress.
-  void Abort();
-
-  // Assigns the target value to |target|.
-  void GetTargetValue(TargetValue* target) const;
-
-  // The properties that the element modifies.
-  const AnimatableProperties& properties() const { return properties_; }
-
-  // The duration of the animation
-  base::TimeDelta duration() const { return duration_; }
-
-  Tween::Type tween_type() const { return tween_type_; }
-  void set_tween_type(Tween::Type tween_type) { tween_type_ = tween_type;}
-
- protected:
-  // Called once each time the animation element is run before any call to
-  // OnProgress.
-  virtual void OnStart(LayerAnimationDelegate* delegate) = 0;
-  virtual bool OnProgress(double t, LayerAnimationDelegate* delegate) = 0;
-  virtual void OnGetTarget(TargetValue* target) const = 0;
-  virtual void OnAbort() = 0;
-
- private:
-  bool first_frame_;
-  const AnimatableProperties properties_;
-  const base::TimeDelta duration_;
-  Tween::Type tween_type_;
-
-  DISALLOW_COPY_AND_ASSIGN(LayerAnimationElement);
-};
-
-}  // namespace ui
-
-#endif  // UI_GFX_COMPOSITOR_LAYER_ANIMATION_ELEMENT_H_