third_party/WebKit/Source/core/animation/animatable/AnimatableClipPathOperation.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
  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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  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/AnimatableClipPathOperation.h"
  33
  34 namespace blink {
  35
  36 bool AnimatableClipPathOperation::usesDefaultInterpolationWith(const AnimatableValue* value) const
  37 {
  38     const AnimatableClipPathOperation* toOperation = toAnimatableClipPathOperation(value);
  39
  40     if (m_operation->type() != ClipPathOperation::SHAPE || toOperation->m_operation->type() != ClipPathOperation::SHAPE)
  41         return true;
  42
  43     const BasicShape* fromShape = toShapeClipPathOperation(clipPathOperation())->basicShape();
  44     const BasicShape* toShape = toShapeClipPathOperation(toOperation->clipPathOperation())->basicShape();
  45
  46     return !fromShape->canBlend(toShape);
  47 }
  48
  49 PassRefPtr<AnimatableValue> AnimatableClipPathOperation::interpolateTo(const AnimatableValue* value, double fraction) const
  50 {
  51     if (usesDefaultInterpolationWith(value))
  52         return defaultInterpolateTo(this, value, fraction);
  53
  54     const AnimatableClipPathOperation* toOperation = toAnimatableClipPathOperation(value);
  55     const BasicShape* fromShape = toShapeClipPathOperation(clipPathOperation())->basicShape();
  56     const BasicShape* toShape = toShapeClipPathOperation(toOperation->clipPathOperation())->basicShape();
  57
  58     return AnimatableClipPathOperation::create(ShapeClipPathOperation::create(toShape->blend(fromShape, fraction)).get());
  59 }
  60
  61 bool AnimatableClipPathOperation::equalTo(const AnimatableValue* value) const
  62 {
  63     const ClipPathOperation* operation = toAnimatableClipPathOperation(value)->m_operation.get();
  64     return m_operation == operation || (m_operation && operation && *m_operation == *operation);
  65 }
  66
  67 }