fluffychat/lib/widgets/event_content/html_message.dart

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import 'package:matrix/matrix.dart';
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import 'package:flutter_matrix_html/flutter_html.dart';
import 'package:flutter/material.dart';
import '../../utils/url_launcher.dart';
import '../../config/setting_keys.dart';
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import '../matrix.dart';
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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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final double emoteSize;
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const HtmlMessage(
{this.html,
this.maxLines,
this.room,
this.defaultTextStyle,
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this.linkStyle,
this.emoteSize});
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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>',
caseSensitive: false, multiLine: false, dotAll: true),
'');
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// there is no need to pre-validate the html, as we validate it while rendering
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final matrix = Matrix.of(context);
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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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emoteSize: emoteSize,
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linkStyle: linkStyle ??
themeData.textTheme.bodyText2.copyWith(
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color: themeData.colorScheme.secondary,
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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(),
getMxcUrl: (String mxc, double width, double height,
{bool animated = false}) {
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final ratio = MediaQuery.of(context).devicePixelRatio;
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return Uri.parse(mxc)
?.getThumbnail(
matrix.client,
width: (width ?? 800) * ratio,
height: (height ?? 800) * ratio,
method: ThumbnailMethod.scale,
animated: animated,
)
.toString();
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},
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setCodeLanguage: (String key, String value) async {
await matrix.store.setItem('${SettingKeys.codeLanguage}.$key', value);
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},
getCodeLanguage: (String key) async {
return await matrix.store.getItem('${SettingKeys.codeLanguage}.$key');
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},
getPillInfo: (String url) async {
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if (room == null) {
return null;
}
final identityParts = url.parseIdentifierIntoParts();
final identifier = identityParts?.primaryIdentifier;
if (identifier == null) {
return null;
}
if (identifier.sigil == '@') {
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// 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.sigil == '#') {
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// 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.sigil == '!') {
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// 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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);
}
}