Initial import attempt, just to play with. Many things disabled/removed

ui/cc/cc/CCActiveAnimation.h

+/*
+ * Copyright (C) 2012 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef CCActiveAnimation_h
+#define CCActiveAnimation_h
+
+#include <wtf/Noncopyable.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/PassOwnPtr.h>
+
+namespace WebCore {
+
+class CCAnimationCurve;
+
+// A CCActiveAnimation, contains all the state required to play a CCAnimationCurve.
+// Specifically, the affected property, the run state (paused, finished, etc.),
+// loop count, last pause time, and the total time spent paused.
+class CCActiveAnimation {
+    WTF_MAKE_NONCOPYABLE(CCActiveAnimation);
+public:
+    // Animations begin in one of the 'waiting' states. Animations waiting for the next tick
+    // will start the next time the controller animates. Animations waiting for target
+    // availibility will run as soon as their target property is free (and all the animations
+    // animating with it are also able to run). Animations waiting for their start time to
+    // come have be scheduled to run at a particular point in time. When this time arrives,
+    // the controller will move the animations into the Running state. Running animations
+    // may toggle between Running and Paused, and may be stopped by moving into either the
+    // Aborted or Finished states. A Finished animation was allowed to run to completion, but
+    // an Aborted animation was not.
+    enum RunState {
+        WaitingForNextTick = 1,
+        WaitingForTargetAvailability,
+        WaitingForStartTime,
+        WaitingForDeletion,
+        Running,
+        Paused,
+        Finished,
+        Aborted
+    };
+
+    enum TargetProperty {
+        Transform = 1,
+        Opacity
+    };
+
+    static PassOwnPtr<CCActiveAnimation> create(PassOwnPtr<CCAnimationCurve>, int animationId, int groupId, TargetProperty);
+
+    virtual ~CCActiveAnimation();
+
+    int id() const { return m_id; }
+    int group() const { return m_group; }
+    TargetProperty targetProperty() const { return m_targetProperty; }
+
+    RunState runState() const { return m_runState; }
+    void setRunState(RunState, double monotonicTime);
+
+    // This is the number of times that the animation will play. If this
+    // value is zero the animation will not play. If it is negative, then
+    // the animation will loop indefinitely.
+    int iterations() const { return m_iterations; }
+    void setIterations(int n) { m_iterations = n; }
+
+    double startTime() const { return m_startTime; }
+    void setStartTime(double monotonicTime) { m_startTime = monotonicTime; }
+    bool hasSetStartTime() const { return m_startTime; }
+
+    double timeOffset() const { return m_timeOffset; }
+    void setTimeOffset(double monotonicTime) { m_timeOffset = monotonicTime; }
+
+    void suspend(double monotonicTime);
+    void resume(double monotonicTime);
+
+    // If alternatesDirection is true, on odd numbered iterations we reverse the curve.
+    bool alternatesDirection() const { return m_alternatesDirection; }
+    void setAlternatesDirection(bool alternates) { m_alternatesDirection = alternates; }
+
+    bool isFinishedAt(double monotonicTime) const;
+    bool isFinished() const { return m_runState == Finished
+                                  || m_runState == Aborted
+                                  || m_runState == WaitingForDeletion; }
+
+    CCAnimationCurve* curve() { return m_curve.get(); }
+    const CCAnimationCurve* curve() const { return m_curve.get(); }
+
+    // If this is true, even if the animation is running, it will not be tickable until
+    // it is given a start time. This is true for animations running on the main thread.
+    bool needsSynchronizedStartTime() const { return m_needsSynchronizedStartTime; }
+    void setNeedsSynchronizedStartTime(bool needsSynchronizedStartTime) { m_needsSynchronizedStartTime = needsSynchronizedStartTime; }
+
+    // Takes the given absolute time, and using the start time and the number
+    // of iterations, returns the relative time in the current iteration.
+    double trimTimeToCurrentIteration(double monotonicTime) const;
+
+    PassOwnPtr<CCActiveAnimation> cloneForImplThread() const;
+
+    void pushPropertiesTo(CCActiveAnimation*) const;
+
+private:
+    CCActiveAnimation(PassOwnPtr<CCAnimationCurve>, int animationId, int groupId, TargetProperty);
+
+    OwnPtr<CCAnimationCurve> m_curve;
+
+    // IDs are not necessarily unique.
+    int m_id;
+
+    // Animations that must be run together are called 'grouped' and have the same group id
+    // Grouped animations are guaranteed to start at the same time and no other animations
+    // may animate any of the group's target properties until all animations in the
+    // group have finished animating. Note: an active animation's group id and target
+    // property uniquely identify that animation.
+    int m_group;
+
+    TargetProperty m_targetProperty;
+    RunState m_runState;
+    int m_iterations;
+    double m_startTime;
+    bool m_alternatesDirection;
+
+    // The time offset effectively pushes the start of the animation back in time. This is
+    // used for resuming paused animations -- an animation is added with a non-zero time
+    // offset, causing the animation to skip ahead to the desired point in time.
+    double m_timeOffset;
+
+    bool m_needsSynchronizedStartTime;
+
+    // When an animation is suspended, it behaves as if it is paused and it also ignores
+    // all run state changes until it is resumed. This is used for testing purposes.
+    bool m_suspended;
+
+    // These are used in trimTimeToCurrentIteration to account for time
+    // spent while paused. This is not included in AnimationState since it
+    // there is absolutely no need for clients of this controller to know
+    // about these values.
+    double m_pauseTime;
+    double m_totalPausedTime;
+};
+
+} // namespace WebCore
+
+#endif // CCActiveAnimation_h