void _writeIndicator()

in lib/src/highlighter.dart [361:409]
45 lines of code
11 McCabe index (conditional complexity)

  void _writeIndicator(
      _Line line, _Highlight highlight, List<_Highlight?> highlightsByColumn) {
    final color = highlight.isPrimary ? _primaryColor : _secondaryColor;
    if (!isMultiline(highlight.span)) {
      _writeSidebar();
      _buffer.write(' ');
      _writeMultilineHighlights(line, highlightsByColumn, current: highlight);
      if (highlightsByColumn.isNotEmpty) _buffer.write(' ');

      _colorize(() {
        _writeUnderline(line, highlight.span,
            highlight.isPrimary ? '^' : glyph.horizontalLineBold);
        _writeLabel(highlight.label);
      }, color: color);
      _buffer.writeln();
    } else if (highlight.span.start.line == line.number) {
      if (highlightsByColumn.contains(highlight)) return;
      replaceFirstNull(highlightsByColumn, highlight);

      _writeSidebar();
      _buffer.write(' ');
      _writeMultilineHighlights(line, highlightsByColumn, current: highlight);
      _colorize(() => _writeArrow(line, highlight.span.start.column),
          color: color);
      _buffer.writeln();
    } else if (highlight.span.end.line == line.number) {
      final coversWholeLine = highlight.span.end.column == line.text.length;
      if (coversWholeLine && highlight.label == null) {
        replaceWithNull(highlightsByColumn, highlight);
        return;
      }

      _writeSidebar();
      _buffer.write(' ');
      _writeMultilineHighlights(line, highlightsByColumn, current: highlight);

      _colorize(() {
        if (coversWholeLine) {
          _buffer.write(glyph.horizontalLine * 3);
        } else {
          _writeArrow(line, math.max(highlight.span.end.column - 1, 0),
              beginning: false);
        }
        _writeLabel(highlight.label);
      }, color: color);
      _buffer.writeln();
      replaceWithNull(highlightsByColumn, highlight);
    }
  }