Source/core/animation/AnimatableUnknown.h

/*
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#ifndef AnimatableUnknown_h
#define AnimatableUnknown_h

#include "CSSValueKeywords.h"
#include "core/animation/AnimatableValue.h"
#include "core/css/CSSValuePool.h"

namespace WebCore {

class AnimatableUnknown : public AnimatableValue {
public:
    virtual ~AnimatableUnknown() { }

    static PassRefPtr<AnimatableUnknown> create(PassRefPtr<CSSValue> value)
    {
        return adoptRef(new AnimatableUnknown(value));
    }
    static PassRefPtr<AnimatableUnknown> create(CSSValueID value)
    {
        return adoptRef(new AnimatableUnknown(cssValuePool().createIdentifierValue(value)));
    }

    PassRefPtr<CSSValue> toCSSValue() const { return m_value; }

protected:
    virtual PassRefPtr<AnimatableValue> interpolateTo(const AnimatableValue* value, double fraction) const OVERRIDE
    {
        return defaultInterpolateTo(this, value, fraction);
    }

private:
    explicit AnimatableUnknown(PassRefPtr<CSSValue> value)
        : m_value(value)
    {
        ASSERT(m_value);
    }
    virtual AnimatableType type() const OVERRIDE { return TypeUnknown; }
    virtual bool equalTo(const AnimatableValue*) const OVERRIDE;

    const RefPtr<CSSValue> m_value;
};

inline const AnimatableUnknown* toAnimatableUnknown(const AnimatableValue* value)
{
    ASSERT_WITH_SECURITY_IMPLICATION(value && value->isUnknown());
    return static_cast<const AnimatableUnknown*>(value);
}

inline bool AnimatableUnknown::equalTo(const AnimatableValue* value) const
{
    const AnimatableUnknown* unknown = toAnimatableUnknown(value);
    return m_value == unknown->m_value || m_value->equals(*unknown->m_value);
}

} // namespace WebCore

#endif // AnimatableUnknown_h