loris/lib/partials/post_text_renderer.dart

import 'package:flutter/material.dart';
import 'package:flutter_markdown/flutter_markdown.dart';
import 'package:html2md/html2md.dart' as html2md;
import 'package:url_launcher/url_launcher.dart';

class PostTextRenderer extends StatelessWidget {
  const PostTextRenderer({
    required this.input,
    Key? key,
  }) : super(key: key);
  final String input;

  @override
  Widget build(BuildContext context) {
    final MarkdownStyleSheet mdStyle = MarkdownStyleSheet(
      codeblockDecoration: BoxDecoration(
        color: Theme.of(context).colorScheme.background,
        borderRadius: const BorderRadius.all(Radius.circular(8)),
        border: Border.all(
          color: Theme.of(context).colorScheme.secondary,
          style: BorderStyle.solid,
        ),
      ),
      code: TextStyle(
        decorationColor: Theme.of(context).backgroundColor,
        color: Theme.of(context).colorScheme.onBackground,
        backgroundColor: Colors.transparent,
      ),
      a: TextStyle(color: Theme.of(context).colorScheme.secondary),
      blockquote: TextStyle(color: Theme.of(context).colorScheme.onBackground),
      blockquoteDecoration: BoxDecoration(
        color: Theme.of(context).colorScheme.background,
        borderRadius: const BorderRadius.all(Radius.circular(8)),
        border: Border.all(
          color: Theme.of(context).colorScheme.secondary,
          style: BorderStyle.solid,
        ),
      ),
    );

    String s = html2md.convert(input);
    return MarkdownBody(
      onTapLink: ((text, href, title) {
        if (href != null) {
          launchUrl(Uri.parse(href));
        }
      }),
      styleSheet: mdStyle,
      data: s,
      selectable: true,
    );
  }
}