new linkify handling

Should fix mentions in non-HTML messages

lib/helpers/extensions/linkify_html.dart

@@ -0,0 +1,45 @@
+import "package:html/dom.dart";
+import "package:html/parser.dart";
+import "package:linkify/linkify.dart";
+import "package:nexus/helpers/matrix_linkifier.dart";
+
+extension LinkifyHtml on String {
+  /// Wraps bare links in this HTML's text in `<a>` tags.
+  ///
+  /// Only text nodes are touched, so attribute values are left alone, and
+  /// text already inside a link or code is skipped.
+  String get linkifiedHtml {
+    final fragment = parseFragment(this);
+    _linkifyNode(fragment);
+    return fragment.outerHtml;
+  }
+}
+
+void _linkifyNode(Node node) {
+  if (node is Element && const {"a", "code", "pre"}.contains(node.localName)) {
+    return;
+  }
+
+  for (final child in node.nodes.toList()) {
+    if (child is! Text) {
+      _linkifyNode(child);
+      continue;
+    }
+
+    final elements = linkifyText(child.data);
+    if (!elements.any((element) => element is LinkableElement)) continue;
+
+    elements
+        .map(
+          (element) => switch (element) {
+            LinkableElement(:final text, :final url) =>
+              Element.tag("a")
+                ..attributes["href"] = url
+                ..append(Text(text)),
+            _ => Text(element.text),
+          },
+        )
+        .forEach((replacement) => node.insertBefore(replacement, child));
+    child.remove();
+  }
+}

lib/helpers/matrix_linkifier.dart

@@ -0,0 +1,38 @@
+import "package:linkify/linkify.dart";
+
+/// Splits [text] into plain text and URL, `matrix:` and email links.
+List<LinkifyElement> linkifyText(String text) => linkify(
+  text,
+  options: const LinkifyOptions(humanize: false),
+  linkifiers: const [UrlLinkifier(), MatrixLinkifier(), EmailLinkifier()],
+);
+
+/// Linkifies `matrix:` URIs, which [UrlLinkifier] only handles for http(s).
+final class const MatrixLinkifier() extends Linkifier {
+  static final _regex = RegExp(
+    r"\bmatrix:[^\s<>\x22\x27]*[^\s<>\x22\x27.,;:!?)\]}]",
+    caseSensitive: false,
+  );
+
+  @override
+  List<LinkifyElement> parse(
+    List<LinkifyElement> elements,
+    LinkifyOptions options,
+  ) => elements
+      .expand(
+        (element) => element is TextElement ? _split(element.text) : [element],
+      )
+      .toList();
+
+  Iterable<LinkifyElement> _split(String text) sync* {
+    var start = 0;
+    for (final match in _regex.allMatches(text)) {
+      if (match.start > start) {
+        yield TextElement(text.substring(start, match.start));
+      }
+      yield UrlElement(match[0]!);
+      start = match.end;
+    }
+    if (start < text.length) yield TextElement(text.substring(start));
+  }
+}

lib/widgets/linkified_text.dart

@@ -1,26 +1,46 @@
+import "package:flutter/gestures.dart";
 import "package:material_ui/material_ui.dart";
-import "package:flutter_linkify/flutter_linkify.dart";
+import "package:linkify/linkify.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/helpers/extensions/get_link_info.dart";
 import "package:nexus/helpers/launch_helper.dart";
+import "package:nexus/helpers/matrix_linkifier.dart";
+import "package:nexus/widgets/html/mention_chip.dart";
 
 final class const LinkifiedText(
   final String text, {
+  final String? roomId,
   final int? maxLines,
   final TextStyle? style,
   super.key,
 }) extends ConsumerWidget {
   @override
-  Widget build(BuildContext context, WidgetRef ref) =>
-      MaterialUiCompatibilityBridge(
-        child: Linkify(
-          text: text,
-          maxLines: maxLines,
+  Widget build(BuildContext context, WidgetRef ref) => Text.rich(
+    TextSpan(
       style: style,
-          options: .new(humanize: false),
-          onOpen: (link) =>
-              ref.read(LaunchHelper.provider).launchUrl(.parse(link.url)),
-          linkStyle: .new(color: Theme.of(context).colorScheme.primary),
-          overflow: maxLines == null ? null : .ellipsis,
+      children: linkifyText(text)
+          .map<InlineSpan>(
+            (element) => switch (element) {
+              LinkableElement(:final url) when url.linkInfo != null =>
+                WidgetSpan(
+                  alignment: .baseline,
+                  baseline: .alphabetic,
+                  child: MentionChip(url, roomId),
                 ),
+              LinkableElement(:final text, :final url) => TextSpan(
+                text: text,
+                style: .new(color: Theme.of(context).colorScheme.primary),
+                mouseCursor: SystemMouseCursors.click,
+                recognizer: TapGestureRecognizer()
+                  ..onTap = () =>
+                      ref.read(LaunchHelper.provider).launchUrl(.parse(url)),
+              ),
+              _ => TextSpan(text: element.text),
+            },
+          )
+          .toList(),
+    ),
+    maxLines: maxLines,
+    overflow: maxLines == null ? null : .ellipsis,
   );
 }

lib/widgets/renderers/message.dart

@@ -5,6 +5,7 @@ import "package:linkify/linkify.dart";
 import "package:nexus/controllers/client_state.dart";
 import "package:nexus/controllers/event.dart";
 import "package:nexus/helpers/extensions/get_filename.dart";
+import "package:nexus/helpers/extensions/linkify_html.dart";
 import "package:nexus/models/content/encrypted.dart";
 import "package:nexus/models/content/message.dart";
 import "package:nexus/models/content/sticker.dart";
@@ -77,26 +78,11 @@ class const MessageRenderer(
                 ? Html(
                     roomId: event.roomId,
                     textStyle: textStyle,
-                    formattedBody.replaceAllMapped(
-                      RegExp(
-                        r"(<a\b[^>]*>.*?<\/a>)|(\bhttps?:\/\/[^\s<]+)",
-                        caseSensitive: false,
-                        dotAll: true,
-                      ),
-                      (m) {
-                        // If it's already an <a> tag, leave it unchanged
-                        if (m.group(1) != null) {
-                          return m.group(1)!;
-                        }
-
-                        // Otherwise, wrap the bare URL
-                        final url = m.group(2)!;
-                        return "<a href=\"$url\">$url</a>";
-                      },
-                    ),
+                    formattedBody.linkifiedHtml,
                   )
                 : LinkifiedText(
                     body.isEmpty ? content.filename ?? "" : body,
+                    roomId: event.roomId,
                     style: textStyle,
                     maxLines: maxLines,
                   ),

lib/widgets/room_summary_sheet.dart

@@ -174,7 +174,7 @@ class const RoomSummarySheet(
             if (summary.topic != null)
               ListTile(
                 title: Text("Topic"),
-                subtitle: LinkifiedText(summary.topic!),
+                subtitle: LinkifiedText(summary.topic!, roomId: summary.roomId),
                 leading: Icon(Icons.info),
               ),
             if (isKnocking)

pubspec.lock

@@ -503,14 +503,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.14.4"
-  flutter_linkify:
-    dependency: "direct main"
-    description:
-      name: flutter_linkify
-      sha256: "74669e06a8f358fee4512b4320c0b80e51cffc496607931de68d28f099254073"
-      url: "https://pub.dev"
-    source: hosted
-    version: "6.0.0"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -672,7 +664,7 @@ packages:
     source: hosted
     version: "3.4.3"
   html:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: html
       sha256: "43b67b8f43321ab066817dfac5619596c98bb1b61624e77203bb4351785f9699"

pubspec.yaml

@@ -89,8 +89,8 @@ dependencies:
     ffigen: 23.0.0
     timeago: 3.7.1
     http: 1.6.0
-    flutter_linkify: 6.0.0
     linkify: 5.0.0
+    html: 0.15.7
     flutter_blurhash: 0.9.1
     super_sliver_list: 0.4.1
     media_kit: 1.2.6