void commitRunBuffer()

in platform/cc/shaper/TextLineRunHandler.hh [58:89]

• 24 lines of code
• 7 McCabe index (conditional complexity)

    void commitRunBuffer(const RunInfo& info) override {
        TextLine::Run& run = fLine->fRuns.back();
        int32_t glyph = 0;
        int32_t graphemesInGlyph = 1;
        SkScalar glyphLeft = run.fPos[glyph].fX;
        run.fBreakOffsets.reserve(info.utf8Range.size() + 1);
        run.fBreakPositions.reserve(info.utf8Range.size() + 1);

        // Only record grapheme clusters boundaries
        for (int32_t offset = fGlyphOffsets[0]; offset <= info.utf8Range.end(); offset = ubrk_following(fGraphemeIter.get(), offset)) {
            run.fBreakOffsets.push_back(conv.from8To16(offset));

            // if grapheme clusters includes multiple glyphs, skip over them
            while (glyph < info.glyphCount && fGlyphOffsets[glyph] < offset)
                ++glyph;

            // if one glyph includes multiple grapheme clusters (ligature, e.g. <->), accumulate
            if ((glyph < info.glyphCount ? fGlyphOffsets[glyph] : info.utf8Range.end()) > offset)
                ++graphemesInGlyph;
            
            // when boundaries meet, distribute break positions evenly inside glyph
            else {
                SkScalar glyphRight = glyph < info.glyphCount ? run.fPos[glyph].fX : fPosition + info.fAdvance.fX;
                SkScalar step = (glyphRight - glyphLeft) / graphemesInGlyph;
                for (int i = 0; i < graphemesInGlyph; ++i)
                    run.fBreakPositions.push_back(glyphLeft + step * (i + 1));
                graphemesInGlyph = 1;
                glyphLeft = glyphRight;
            }
        }
        fPosition += info.fAdvance.fX;
    }