parse em html

Signed-off-by: dom <githubaccount56556@proton.me>

lib/utils/em.dart

@@ -5,26 +5,14 @@ abstract final class Em {
   );
 
   static String regCate(String origin) {
-    Iterable<Match> matches = _exp.allMatches(origin);
+    final matches = _exp.firstMatch(origin);
-    return matches.lastOrNull?.group(1) ?? origin;
+    return matches?.group(1) ?? origin;
   }
 
-  static List<({bool isEm, String text})> regTitle(String origin) {
+  static String parseHtml(String str) {
-    List<({bool isEm, String text})> res = [];
+    return str.replaceAllMapped(
-    origin.splitMapJoin(
-      _exp,
-      onMatch: (Match match) {
-        String matchStr = match[0]!;
-        res.add((isEm: true, text: regCate(matchStr)));
-        return '';
-      },
-      onNonMatch: (String str) {
-        if (str != '') {
-          res.add((
-            isEm: false,
-            text: str.replaceAllMapped(
       _htmlRegExp,
-              (m) => switch (m.group(1)) {
+      (match) => switch (match.group(1)) {
         'lt' => '<',
         'gt' => '>',
         'quot' => '"',
@@ -34,10 +22,22 @@ abstract final class Em {
         var i? when (i.startsWith('#x')) => String.fromCharCode(
           int.parse(i.substring(2), radix: 16),
         ),
-                _ => m.group(0)!,
+        _ => match.group(0)!,
       },
-            ),
+    );
-          ));
+  }
+
+  static List<({bool isEm, String text})> regTitle(String origin) {
+    List<({bool isEm, String text})> res = [];
+    origin.splitMapJoin(
+      _exp,
+      onMatch: (Match match) {
+        res.add((isEm: true, text: parseHtml(match[1] ?? match[0]!)));
+        return '';
+      },
+      onNonMatch: (String str) {
+        if (str != '') {
+          res.add((isEm: false, text: parseHtml(str)));
         }
         return '';
       },