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,
}) {
  int lastStartingRunStart = 0;
  final List<InlineSpan> inlineSpans = <InlineSpan>[];

  for (final _TextMention mention in _cachedMentions) {
    final int indexToEndRegular = mention.start;

    if (indexToEndRegular != lastStartingRunStart) {
      inlineSpans.add(
        _createSpanForNonMatchingRange(
          style: style,
          start: lastStartingRunStart,
          end: indexToEndRegular,
        ),
      );
    }

    inlineSpans.add(
      TextSpan(
        text: text.substring(mention.start, mention.end),
        style: (style?.merge(mentionTextStyle) ?? mentionTextStyle)?.copyWith(
          backgroundColor: mentionBgColor,
          color: mentionTextColor,
        ),
      ),
    );

    lastStartingRunStart = mention.end;
  }

  if (lastStartingRunStart < text.length) {
    inlineSpans.add(
      _createSpanForNonMatchingRange(
        style: style,
        start: lastStartingRunStart,
        end: text.length,
      ),
    );
  }

  return TextSpan(children: inlineSpans);
}