// Copyright 2015 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 CSSLengthInterpolationType_h
#define CSSLengthInterpolationType_h

#include "core/animation/CSSInterpolationType.h"
#include "core/animation/LengthPropertyFunctions.h"
#include <memory>

namespace blink {

class ComputedStyle;

class CSSLengthInterpolationType : public CSSInterpolationType {
 public:
  CSSLengthInterpolationType(PropertyHandle);

  InterpolationValue maybeConvertUnderlyingValue(
      const InterpolationEnvironment&) const final;
  void composite(UnderlyingValueOwner&,
                 double underlyingFraction,
                 const InterpolationValue&,
                 double interpolationFraction) const final;
  void apply(const InterpolableValue&,
             const NonInterpolableValue*,
             InterpolationEnvironment&) const final;

 private:
  float effectiveZoom(const ComputedStyle&) const;

  InterpolationValue maybeConvertNeutral(const InterpolationValue& underlying,
                                         ConversionCheckers&) const final;
  InterpolationValue maybeConvertInitial(const StyleResolverState&,
                                         ConversionCheckers&) const final;
  InterpolationValue maybeConvertInherit(const StyleResolverState&,
                                         ConversionCheckers&) const final;
  InterpolationValue maybeConvertValue(const CSSValue&,
                                       const StyleResolverState&,
                                       ConversionCheckers&) const final;

  PairwiseInterpolationValue maybeMergeSingles(
      InterpolationValue&& start,
      InterpolationValue&& end) const final;

  const ValueRange m_valueRange;
};

}  // namespace blink

#endif  // CSSLengthInterpolationType_h
