FurryChat/lib/components/html_message.dart

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import 'package:famedlysdk/famedlysdk.dart';
import 'package:flutter_matrix_html/flutter_html.dart';
import 'package:flutter/material.dart';
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import '../utils/url_launcher.dart';
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import 'matrix.dart';
class HtmlMessage extends StatelessWidget {
final String html;
final int maxLines;
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final Room room;
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final TextStyle defaultTextStyle;
final TextStyle linkStyle;
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const HtmlMessage(
{this.html,
this.maxLines,
this.room,
this.defaultTextStyle,
this.linkStyle});
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@override
Widget build(BuildContext context) {
// riot-web is notorious for creating bad reply fallback events from invalid messages which, if
// not handled properly, can lead to impersination. As such, we strip the entire `<mx-reply>` tags
// here already, to prevent that from happening.
// We do *not* do this in an AST and just with simple regex here, as riot-web tends to create
// miss-matching tags, and this way we actually correctly identify what we want to strip and, well,
// strip it.
final renderHtml = html.replaceAll(RegExp('<mx-reply>.*<\/mx-reply>'), '');
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// there is no need to pre-validate the html, as we validate it while rendering
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final themeData = Theme.of(context);
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return Html(
data: renderHtml,
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defaultTextStyle: defaultTextStyle,
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linkStyle: linkStyle ??
themeData.textTheme.bodyText2.copyWith(
color: themeData.accentColor,
decoration: TextDecoration.underline,
),
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shrinkToFit: true,
maxLines: maxLines,
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onLinkTap: (url) => UrlLauncher(context, url).launchUrl(),
onPillTap: (url) => UrlLauncher(context, url).launchUrl(),
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getMxcUrl: (String mxc, double width, double height) {
final ratio = MediaQuery.of(context).devicePixelRatio;
return Uri.parse(mxc)?.getThumbnail(
Matrix.of(context).client,
width: (width ?? 800) * ratio,
height: (height ?? 800) * ratio,
method: ThumbnailMethod.scale,
);
},
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getPillInfo: (String identifier) async {
if (room == null) {
return null;
}
if (identifier[0] == '@') {
// we have a user pill
final user = room.getState('m.room.member', identifier);
if (user != null) {
return user.content;
}
// there might still be a profile...
final profile = await room.client.getProfileFromUserId(identifier);
if (profile != null) {
return {
'displayname': profile.displayname,
'avatar_url': profile.avatarUrl.toString(),
};
}
return null;
}
if (identifier[0] == '#') {
// we have an alias pill
for (final r in room.client.rooms) {
final state = r.getState('m.room.canonical_alias');
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if (state != null &&
((state.content['alias'] is String &&
state.content['alias'] == identifier) ||
(state.content['alt_aliases'] is List &&
state.content['alt_aliases'].contains(identifier)))) {
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// we have a room!
return {
'displayname': identifier,
'avatar_url': r.getState('m.room.avatar')?.content['url'],
};
}
}
return null;
}
if (identifier[0] == '!') {
// we have a room ID pill
final r = room.client.getRoomById(identifier);
if (r == null) {
return null;
}
return {
'displayname': r.canonicalAlias,
'avatar_url': r.getState('m.room.avatar')?.content['url'],
};
}
return null;
},
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);
}
}