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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef TransitionEffectModel_h |
| 6 #define TransitionEffectModel_h |
| 7 |
| 8 #include "core/animation/EffectModel.h" |
| 9 #include "core/animation/PairwiseInterpolation.h" |
| 10 #include "platform/animation/TimingFunction.h" |
| 11 |
| 12 namespace blink { |
| 13 |
| 14 class Element; |
| 15 class TransitionEffectModelTest; |
| 16 |
| 17 class TransitionEffectModel : public EffectModel { |
| 18 public: |
| 19 static TransitionEffectModel* create(PassRefPtr<PairwiseInterpolation> pairw
iseInterpolation, double delayOffset, PassRefPtr<TimingFunction> timingFunction) |
| 20 { |
| 21 return new TransitionEffectModel(pairwiseInterpolation, delayOffset, tim
ingFunction); |
| 22 } |
| 23 |
| 24 private: |
| 25 TransitionEffectModel(PassRefPtr<PairwiseInterpolation> pairwiseInterpolatio
n, double delayOffset, PassRefPtr<TimingFunction> timingFunction) |
| 26 : m_interpolation(pairwiseInterpolation) |
| 27 , m_delayOffset(delayOffset) |
| 28 , m_timingFunction(timingFunction) |
| 29 { |
| 30 DCHECK(delayOffset >= 0 && delayOffset < 1); |
| 31 } |
| 32 |
| 33 bool affects(PropertyHandle property) const final |
| 34 { |
| 35 return m_interpolation->getProperty() == property; |
| 36 } |
| 37 |
| 38 bool isTransitionEffectModel() const final { return true; } |
| 39 |
| 40 void sampleImpl(int iteration, double fraction, double iterationDuration, Ve
ctor<RefPtr<Interpolation>>& result) const final |
| 41 { |
| 42 double delayedFraction = 0; |
| 43 if (fraction > m_delayOffset) { |
| 44 delayedFraction = (fraction - m_delayOffset) / (1 - m_delayOffset); |
| 45 } |
| 46 delayedFraction = m_timingFunction->evaluate(delayedFraction, iterationD
uration); |
| 47 m_interpolation->interpolate(0, delayedFraction); |
| 48 if (result.isEmpty()) { |
| 49 result.append(m_interpolation); |
| 50 } else { |
| 51 result[0] = m_interpolation; |
| 52 result.shrink(1); |
| 53 } |
| 54 } |
| 55 |
| 56 const RefPtr<PairwiseInterpolation> m_interpolation; |
| 57 const double m_delayOffset; |
| 58 RefPtr<TimingFunction> m_timingFunction; |
| 59 }; |
| 60 |
| 61 } // namespace blink |
| 62 |
| 63 #endif // TransitionEffectModel_h |
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