third_party/WebKit/Source/core/animation/CSSLengthPairInterpolationType.h

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CSSLengthPairInterpolationType_h
#define CSSLengthPairInterpolationType_h

#include "core/animation/CSSLengthInterpolationType.h"
#include "core/animation/CSSLengthListInterpolationType.h"
#include "core/animation/ListInterpolationFunctions.h"
#include "core/css/CSSValuePair.h"

namespace blink {

class CSSLengthPairInterpolationType : public CSSLengthListInterpolationType {
public:
    CSSLengthPairInterpolationType(CSSPropertyID property)
        : CSSLengthListInterpolationType(property)
    { }

private:
    InterpolationValue maybeConvertValue(const CSSValue& value, const StyleResolverState&, ConversionCheckers&) const final
    {
        const CSSValuePair& pair = toCSSValuePair(value);
        return ListInterpolationFunctions::createList(2, [&pair](size_t index) {
            return CSSLengthInterpolationType::maybeConvertCSSValue(index == 0 ? pair.first() : pair.second());
        });
    }
};

} // namespace blink

#endif // CSSLengthPairInterpolationType_h