Source/WebCore/svg/SVGPathSource.h

/*
 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
 * Copyright (C) 2024 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#pragma once

#include "FloatPoint.h"
#include "SVGPathSeg.h"
#include <wtf/WeakPtr.h>

namespace WebCore {
class SVGPathSource;
}

namespace WTF {
template<typename T> struct IsDeprecatedWeakRefSmartPointerException;
template<> struct IsDeprecatedWeakRefSmartPointerException<WebCore::SVGPathSource> : std::true_type { };
}

namespace WebCore {

class SVGPathSource : public CanMakeSingleThreadWeakPtr<SVGPathSource> {
    WTF_MAKE_TZONE_ALLOCATED(SVGPathSource);
    WTF_MAKE_NONCOPYABLE(SVGPathSource);
public:
    SVGPathSource() = default;
    virtual ~SVGPathSource() = default;

    virtual bool hasMoreData() const = 0;
    virtual bool moveToNextToken() = 0;
    virtual SVGPathSegType nextCommand(SVGPathSegType previousCommand) = 0;

    virtual std::optional<SVGPathSegType> parseSVGSegmentType() = 0;

    struct MoveToSegment {
        FloatPoint targetPoint;
    };
    virtual std::optional<MoveToSegment> parseMoveToSegment(FloatPoint currentPoint) = 0;

    struct LineToSegment {
        FloatPoint targetPoint;
    };
    virtual std::optional<LineToSegment> parseLineToSegment(FloatPoint currentPoint) = 0;

    struct LineToHorizontalSegment {
        float x = 0;
    };
    virtual std::optional<LineToHorizontalSegment> parseLineToHorizontalSegment(FloatPoint currentPoint) = 0;

    struct LineToVerticalSegment {
        float y = 0;
    };
    virtual std::optional<LineToVerticalSegment> parseLineToVerticalSegment(FloatPoint currentPoint) = 0;

    struct CurveToCubicSegment {
        FloatPoint point1;
        FloatPoint point2;
        FloatPoint targetPoint;
    };
    virtual std::optional<CurveToCubicSegment> parseCurveToCubicSegment(FloatPoint currentPoint) = 0;

    struct CurveToCubicSmoothSegment {
        FloatPoint point2;
        FloatPoint targetPoint;
    };
    virtual std::optional<CurveToCubicSmoothSegment> parseCurveToCubicSmoothSegment(FloatPoint currentPoint) = 0;

    struct CurveToQuadraticSegment {
        FloatPoint point1;
        FloatPoint targetPoint;
    };
    virtual std::optional<CurveToQuadraticSegment> parseCurveToQuadraticSegment(FloatPoint currentPoint) = 0;

    struct CurveToQuadraticSmoothSegment {
        FloatPoint targetPoint;
    };
    virtual std::optional<CurveToQuadraticSmoothSegment> parseCurveToQuadraticSmoothSegment(FloatPoint currentPoint) = 0;

    struct ArcToSegment {
        float rx = 0;
        float ry = 0;
        float angle = 0;
        bool largeArc = false;
        bool sweep = false;
        FloatPoint targetPoint;
    };
    virtual std::optional<ArcToSegment> parseArcToSegment(FloatPoint currentPoint) = 0;
};

} // namespace WebCore