buildTextSpan method

@override TextSpan buildTextSpan({ required BuildContext context, TextStyle? style, required bool withComposing, })

Builds TextSpan from current editing value.

By default makes text in composing range appear as underlined. Descendants can override this method to customize appearance of text.

Implementation

@override
TextSpan buildTextSpan({
  required BuildContext context,
  TextStyle? style,
  required bool withComposing,
}) {
  final children = <TextSpan>[];

  text.splitMapJoin(
    RegExp(_listPatternStyle.map((it) => it.regExp.pattern).join('|')),
    onMatch: (match) {
      final text = match[0]!;
      final style = _listPatternStyle
          .firstWhere((element) => element.regExp.hasMatch(text))
          .textStyle;

      final span = TextSpan(text: match.group(0), style: style);
      children.add(span);
      return span.toPlainText();
    },
    onNonMatch: (text) {
      final span = TextSpan(text: text, style: style);
      children.add(span);
      return span.toPlainText();
    },
  );

  return TextSpan(style: style, children: children);
}