productToTex function

String productToTex(String items, { String? unit, SiOptions? options, })

A product: \numproduct{1 x 2 x 3}, \qtyproduct{1 x 2}{\metre}.

Implementation

String productToTex(String items, {String? unit, SiOptions? options}) {
  final o = options ?? const SiOptions();
  final parts = items
      .split('x')
      .map((s) => s.trim())
      .where((s) => s.isNotEmpty)
      .toList();
  final sep = o['product-mode'] == 'phrase'
      ? _textSetting(o, 'product-phrase')
      : o['product-symbol'];
  String join(List<String> p) => p.join(sep);
  final mode = o['product-units'];
  if (unit != null &&
      unit.trim().isNotEmpty &&
      (mode == 'power' ||
          mode == 'brackets-power' ||
          mode == 'bracket-power')) {
    final uo = o._forUnit(unit);
    final u = _unitToTex(unit, uo, parts.length);
    final numbers = join([for (final n in parts) numToTex(n, options: o)]);
    return _quantityParts(
      mode == 'power'
          ? numbers
          : '${o['product-open-bracket']}$numbers${o['product-close-bracket']}',
      unit,
      u,
      uo,
    );
  }
  return _withUnits(
    parts,
    unit,
    o,
    mode,
    join,
    open: o['product-open-bracket'],
    close: o['product-close-bracket'],
  );
}