如何在Flutter中按字符换行(不在空格或‘-’处换行)？

import 'package:flutter/material.dart';

class WrapText extends StatelessWidget {
  final String text;

  WrapText({required this.text});

  @override
  Widget build(BuildContext context) {
    return LayoutBuilder(
      builder: (BuildContext context, BoxConstraints constraints) {
        final textPainter = TextPainter(
          text: TextSpan(
            text: text,
            style: TextStyle(fontSize: 16),
          ),
          maxLines: null,
          textDirection: TextDirection.ltr,
        )..layout(maxWidth: constraints.maxWidth);

        final textSpan = textPainter.text;
        final textLength = textSpan.toPlainText().length;

        List<InlineSpan> wrappedText = [];
        int start = 0;

        for (int end = 1; end <= textLength; end++) {
          final substring = text.substring(start, end);
          textPainter.text = TextSpan(text: substring, style: TextStyle(fontSize: 16));
          textPainter.layout();

          if (textPainter.didExceedMaxLines) {
            wrappedText.add(TextSpan(text: text.substring(start, end - 1)));
            start = end - 1;
          }
        }

        wrappedText.add(TextSpan(text: text.substring(start)));

        return RichText(
          text: TextSpan(children: wrappedText),
        );
      },
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: Scaffold(
      body: Center(
        child: WrapText(
          text: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed euismod, nunc id aliquam tincidunt, nisl nunc lacinia nunc, id lacinia nunc nunc id nunc.',
        ),
      ),
    ),
  ));
}