include/rive/text/line_breaker.hpp

/*
 * Copyright 2022 Rive
 */

#ifndef _RIVE_RENDER_GLYPH_LINE_H_
#define _RIVE_RENDER_GLYPH_LINE_H_

#include "rive/render_text.hpp"

namespace rive {

    struct RenderGlyphLine {
        int startRun;
        int startIndex;
        int endRun;
        int endIndex;
        int wsRun;
        int wsIndex;
        float startX;
        float top = 0, baseline = 0, bottom = 0;

        RenderGlyphLine(int startRun,
                        int startIndex,
                        int endRun,
                        int endIndex,
                        int wsRun,
                        int wsIndex,
                        float startX) :
            startRun(startRun),
            startIndex(startIndex),
            endRun(endRun),
            endIndex(endIndex),
            wsRun(wsRun),
            wsIndex(wsIndex),
            startX(startX) {}

        static std::vector<RenderGlyphLine>
        BreakLines(Span<const RenderGlyphRun> runs, Span<const int> breaks, float width);

        // Compute values for top/baseline/bottom per line
        static void ComputeLineSpacing(rive::Span<RenderGlyphLine>,
                                       rive::Span<const RenderGlyphRun>);
    };

} // namespace rive

#endif