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

// 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 InterpolatedSVGPathSource_h
#define InterpolatedSVGPathSource_h

#include "core/animation/SVGPathSegInterpolationFunctions.h"
#include "core/svg/SVGPathSource.h"
#include "wtf/Vector.h"

namespace blink {

class InterpolatedSVGPathSource : public SVGPathSource {
public:
    InterpolatedSVGPathSource(const InterpolableList& listValue, const Vector<SVGPathSegType>& pathSegTypes)
        : m_currentIndex(0)
        , m_interpolablePathSegs(listValue)
        , m_pathSegTypes(pathSegTypes)
    {
        ASSERT(m_interpolablePathSegs.length() == m_pathSegTypes.size());
    }

private:
    bool hasMoreData() const override;
    SVGPathSegType peekSegmentType() override;
    PathSegmentData parseSegment() override;

    PathCoordinates m_currentCoordinates;
    size_t m_currentIndex;
    const InterpolableList& m_interpolablePathSegs;
    const Vector<SVGPathSegType>& m_pathSegTypes;
};

bool InterpolatedSVGPathSource::hasMoreData() const
{
    return m_currentIndex < m_interpolablePathSegs.length();
}

SVGPathSegType InterpolatedSVGPathSource::peekSegmentType()
{
    ASSERT(hasMoreData());
    return m_pathSegTypes.at(m_currentIndex);
}

PathSegmentData InterpolatedSVGPathSource::parseSegment()
{
    PathSegmentData segment = SVGPathSegInterpolationFunctions::consumeInterpolablePathSeg(*m_interpolablePathSegs.get(m_currentIndex), m_pathSegTypes.at(m_currentIndex), m_currentCoordinates);
    m_currentIndex++;
    return segment;
}

} // namespace blink

#endif // InterpolatedSVGPathSource_h