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      1 /*
      2  * Copyright (C) 2009 Apple Inc. All rights reserved.
      3  * Copyright (C) 2013 Intel Corporation. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef AnimationValue_h
     28 #define AnimationValue_h
     29 
     30 #include "platform/animation/TimingFunction.h"
     31 #include "platform/graphics/filters/FilterOperations.h"
     32 #include "platform/transforms/TransformOperations.h"
     33 
     34 #include "wtf/PassRefPtr.h"
     35 #include "wtf/RefPtr.h"
     36 
     37 namespace blink {
     38 
     39 // Base class for animation values (also used for transitions). Here to
     40 // represent values for properties being animated via the GraphicsLayer,
     41 // without pulling in style-related data from outside of the platform directory.
     42 class AnimationValue {
     43     WTF_MAKE_FAST_ALLOCATED;
     44 public:
     45     explicit AnimationValue(double keyTime, PassRefPtr<TimingFunction> timingFunction = nullptr)
     46         : m_keyTime(keyTime)
     47         , m_timingFunction(timingFunction)
     48     {
     49     }
     50 
     51     virtual ~AnimationValue() { }
     52 
     53     double keyTime() const { return m_keyTime; }
     54     const TimingFunction* timingFunction() const { return m_timingFunction.get(); }
     55     virtual PassOwnPtr<AnimationValue> clone() const = 0;
     56 
     57 private:
     58     double m_keyTime;
     59     RefPtr<TimingFunction> m_timingFunction;
     60 };
     61 
     62 // Used to store one float value of an animation.
     63 class FloatAnimationValue FINAL : public AnimationValue {
     64 public:
     65     FloatAnimationValue(double keyTime, float value, PassRefPtr<TimingFunction> timingFunction = nullptr)
     66         : AnimationValue(keyTime, timingFunction)
     67         , m_value(value)
     68     {
     69     }
     70     virtual PassOwnPtr<AnimationValue> clone() const OVERRIDE { return adoptPtr(new FloatAnimationValue(*this)); }
     71 
     72     float value() const { return m_value; }
     73 
     74 private:
     75     float m_value;
     76 };
     77 
     78 // Used to store one transform value in a keyframe list.
     79 class TransformAnimationValue FINAL : public AnimationValue {
     80 public:
     81     explicit TransformAnimationValue(double keyTime, const TransformOperations* value = 0, PassRefPtr<TimingFunction> timingFunction = nullptr)
     82         : AnimationValue(keyTime, timingFunction)
     83     {
     84         if (value)
     85             m_value = *value;
     86     }
     87     virtual PassOwnPtr<AnimationValue> clone() const OVERRIDE { return adoptPtr(new TransformAnimationValue(*this)); }
     88 
     89     const TransformOperations* value() const { return &m_value; }
     90 
     91 private:
     92     TransformOperations m_value;
     93 };
     94 
     95 // Used to store one filter value in a keyframe list.
     96 class FilterAnimationValue FINAL : public AnimationValue {
     97 public:
     98     explicit FilterAnimationValue(double keyTime, const FilterOperations* value = 0, PassRefPtr<TimingFunction> timingFunction = nullptr)
     99         : AnimationValue(keyTime, timingFunction)
    100     {
    101         if (value)
    102             m_value = *value;
    103     }
    104     virtual PassOwnPtr<AnimationValue> clone() const OVERRIDE { return adoptPtr(new FilterAnimationValue(*this)); }
    105 
    106     const FilterOperations* value() const { return &m_value; }
    107 
    108 private:
    109     FilterOperations m_value;
    110 };
    111 
    112 } // namespace blink
    113 
    114 #endif // AnimationValue_h
    115