#ifndef AnimatableValue_h
#define AnimatableValue_h
#include "core/css/CSSValue.h"
#include "heap/Handle.h"
#include "wtf/RefCounted.h"
namespace WebCore {
class AnimatableValue : public RefCountedWillBeGarbageCollectedFinalized<AnimatableValue> {
public:
virtual ~AnimatableValue() { }
static const AnimatableValue* neutralValue();
static PassRefPtrWillBeRawPtr<AnimatableValue> interpolate(const AnimatableValue*, const AnimatableValue*, double fraction);
static PassRefPtrWillBeRawPtr<AnimatableValue> add(const AnimatableValue*, const AnimatableValue*);
static double distance(const AnimatableValue* from, const AnimatableValue* to);
static bool usesDefaultInterpolation(const AnimatableValue* from, const AnimatableValue* to)
{
return !from->isSameType(to) || from->usesDefaultInterpolationWith(to);
}
bool equals(const AnimatableValue* value) const
{
return isSameType(value) && equalTo(value);
}
bool equals(const AnimatableValue& value) const
{
return equals(&value);
}
bool isClipPathOperation() const { return type() == TypeClipPathOperation; }
bool isColor() const { return type() == TypeColor; }
bool isDouble() const { return type() == TypeDouble; }
bool isFilterOperations() const { return type() == TypeFilterOperations; }
bool isImage() const { return type() == TypeImage; }
bool isLength() const { return type() == TypeLength; }
bool isLengthBox() const { return type() == TypeLengthBox; }
bool isLengthBoxAndBool() const { return type() == TypeLengthBoxAndBool; }
bool isLengthPoint() const { return type() == TypeLengthPoint; }
bool isLengthPoint3D() const { return type() == TypeLengthPoint3D; }
bool isLengthSize() const { return type() == TypeLengthSize; }
bool isNeutral() const { return type() == TypeNeutral; }
bool isRepeatable() const { return type() == TypeRepeatable; }
bool isSVGLength() const { return type() == TypeSVGLength; }
bool isSVGPaint() const { return type() == TypeSVGPaint; }
bool isShadow() const { return type() == TypeShadow; }
bool isShapeValue() const { return type() == TypeShapeValue; }
bool isStrokeDasharrayList() const { return type() == TypeStrokeDasharrayList; }
bool isTransform() const { return type() == TypeTransform; }
bool isUnknown() const { return type() == TypeUnknown; }
bool isVisibility() const { return type() == TypeVisibility; }
bool isSameType(const AnimatableValue* value) const
{
ASSERT(value);
return value->type() == type();
}
virtual void trace(Visitor*) = 0;
protected:
enum AnimatableType {
TypeClipPathOperation,
TypeColor,
TypeDouble,
TypeFilterOperations,
TypeImage,
TypeLength,
TypeLengthBox,
TypeLengthBoxAndBool,
TypeLengthPoint,
TypeLengthPoint3D,
TypeLengthSize,
TypeNeutral,
TypeRepeatable,
TypeSVGLength,
TypeSVGPaint,
TypeShadow,
TypeShapeValue,
TypeStrokeDasharrayList,
TypeTransform,
TypeUnknown,
TypeVisibility,
};
virtual bool usesDefaultInterpolationWith(const AnimatableValue* value) const { return false; }
virtual PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const = 0;
static PassRefPtrWillBeRawPtr<AnimatableValue> defaultInterpolateTo(const AnimatableValue* left, const AnimatableValue* right, double fraction) { return takeConstRef((fraction < 0.5) ? left : right); }
virtual PassRefPtrWillBeRawPtr<AnimatableValue> addWith(const AnimatableValue*) const;
static PassRefPtrWillBeRawPtr<AnimatableValue> defaultAddWith(const AnimatableValue* left, const AnimatableValue* right) { return takeConstRef(right); }
template <class T>
static PassRefPtrWillBeRawPtr<T> takeConstRef(const T* value) { return PassRefPtrWillBeRawPtr<T>(const_cast<T*>(value)); }
private:
virtual AnimatableType type() const = 0;
virtual bool equalTo(const AnimatableValue*) const = 0;
virtual double distanceTo(const AnimatableValue*) const;
template <class Keyframe> friend class KeyframeEffectModel;
};
#define DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(thisType, predicate) \
DEFINE_TYPE_CASTS(thisType, AnimatableValue, value, value->predicate, value.predicate)
}
#endif