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

   1 /*
   2  * Copyright (C) 2013 Google Inc. All rights reserved.
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   4  * Redistribution and use in source and binary forms, with or without
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  10  *     * Redistributions in binary form must reproduce the above
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  12  * in the documentation and/or other materials provided with the
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  16  * this software without specific prior written permission.
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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/AnimatableShapeValue.h"
  33
  34 namespace blink {
  35
  36 bool AnimatableShapeValue::usesDefaultInterpolationWith(const AnimatableValue* value) const
  37 {
  38     const AnimatableShapeValue* shapeValue = toAnimatableShapeValue(value);
  39
  40     if (m_shape->type() != ShapeValue::Shape
  41         || shapeValue->m_shape->type() != ShapeValue::Shape
  42         || m_shape->cssBox() != shapeValue->m_shape->cssBox())
  43         return true;
  44
  45     const BasicShape* fromShape = this->m_shape->shape();
  46     const BasicShape* toShape = shapeValue->m_shape->shape();
  47
  48     return !fromShape->canBlend(toShape);
  49 }
  50
  51 PassRefPtr<AnimatableValue> AnimatableShapeValue::interpolateTo(const AnimatableValue* value, double fraction) const
  52 {
  53     if (usesDefaultInterpolationWith(value))
  54         return defaultInterpolateTo(this, value, fraction);
  55
  56     const AnimatableShapeValue* shapeValue = toAnimatableShapeValue(value);
  57     const BasicShape* fromShape = this->m_shape->shape();
  58     const BasicShape* toShape = shapeValue->m_shape->shape();
  59     return AnimatableShapeValue::create(ShapeValue::createShapeValue(toShape->blend(fromShape, fraction), shapeValue->m_shape->cssBox()).get());
  60 }
  61
  62 bool AnimatableShapeValue::equalTo(const AnimatableValue* value) const
  63 {
  64     const ShapeValue* shape = toAnimatableShapeValue(value)->m_shape.get();
  65     return m_shape == shape || (m_shape && shape && *m_shape == *shape);
  66 }
  67
  68 }