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32 #include "core/animation/AnimatableValue.h"
33 #include "core/animation/AnimatableNeutral.h"
34 #include "wtf/StdLibExtras.h"
39 const double defaultDistance = 1;
45 const AnimatableValue* AnimatableValue::neutralValue()
47 DEFINE_STATIC_REF_WILL_BE_PERSISTENT(AnimatableNeutral, neutralSentinelValue, (AnimatableNeutral::create()));
48 return neutralSentinelValue;
51 PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableValue::interpolate(const AnimatableValue* left, const AnimatableValue* right, double fraction)
55 ASSERT(!left->isNeutral());
56 ASSERT(!right->isNeutral());
58 if (fraction && fraction != 1 && left->isSameType(right))
59 return left->interpolateTo(right, fraction);
61 return defaultInterpolateTo(left, right, fraction);
64 double AnimatableValue::distance(const AnimatableValue* left, const AnimatableValue* right)
69 if (left->isSameType(right))
70 return left->distanceTo(right);
72 return defaultDistance;
75 double AnimatableValue::distanceTo(const AnimatableValue*) const
77 return defaultDistance;
80 } // namespace WebCore