third_party/WebKit/Source/core/animation/animatable/AnimatableShadow.cpp

   1 /*
   2  * Copyright (C) 2013 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
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   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
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  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
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  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32 #include "core/animation/animatable/AnimatableShadow.h"
  33
  34 namespace blink {
  35
  36 PassRefPtr<AnimatableValue> AnimatableShadow::interpolateTo(const AnimatableValue* value, double fraction) const
  37 {
  38     if (usesDefaultInterpolationWith(value))
  39         return defaultInterpolateTo(this, value, fraction);
  40
  41     const AnimatableShadow* shadowList = toAnimatableShadow(value);
  42     return AnimatableShadow::create(ShadowList::blend(m_shadowList.get(), shadowList->m_shadowList.get(), fraction, m_currentColor), m_currentColor);
  43 }
  44
  45 bool AnimatableShadow::usesDefaultInterpolationWith(const AnimatableValue* value) const
  46 {
  47     const AnimatableShadow* target = toAnimatableShadow(value);
  48     if (!m_shadowList || !target->m_shadowList)
  49         return false;
  50
  51     size_t minLength = std::min(m_shadowList->shadows().size(), target->m_shadowList->shadows().size());
  52     for (size_t i = 0; i < minLength; ++i) {
  53         ShadowStyle fromShadowStyle = m_shadowList->shadows()[i].style();
  54         ShadowStyle toShadowStyle = target->m_shadowList->shadows()[i].style();
  55
  56         if (fromShadowStyle != toShadowStyle)
  57             return true;
  58     }
  59
  60     return false;
  61 }
  62
  63 bool AnimatableShadow::equalTo(const AnimatableValue* value) const
  64 {
  65     const ShadowList* shadowList = toAnimatableShadow(value)->m_shadowList.get();
  66     return m_shadowList == shadowList || (m_shadowList && shadowList && *m_shadowList == *shadowList);
  67 }
  68
  69 } // namespace blink