parse em html

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

lib/utils/em.dart

@@ -5,8 +5,26 @@ 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 String parseHtml(String str) {
+    return str.replaceAllMapped(
+      _htmlRegExp,
+      (match) => switch (match.group(1)) {
+        'lt' => '<',
+        'gt' => '>',
+        'quot' => '"',
+        'apos' => "'",
+        'nbsp' => ' ',
+        'amp' => '&',
+        var i? when (i.startsWith('#x')) => String.fromCharCode(
+          int.parse(i.substring(2), radix: 16),
+        ),
+        _ => match.group(0)!,
+      },
+    );
   }
 
   static List<({bool isEm, String text})> regTitle(String origin) {
@@ -14,30 +32,12 @@ abstract final class Em {
     origin.splitMapJoin(
       _exp,
       onMatch: (Match match) {
-        String matchStr = match[0]!;
+        res.add((isEm: true, text: parseHtml(match[1] ?? match[0]!)));
-        res.add((isEm: true, text: regCate(matchStr)));
         return '';
       },
       onNonMatch: (String str) {
         if (str != '') {
-          res.add((
+          res.add((isEm: false, text: parseHtml(str)));
-            isEm: false,
-            text: str.replaceAllMapped(
-              _htmlRegExp,
-              (m) => switch (m.group(1)) {
-                'lt' => '<',
-                'gt' => '>',
-                'quot' => '"',
-                'apos' => "'",
-                'nbsp' => ' ',
-                'amp' => '&',
-                var i? when (i.startsWith('#x')) => String.fromCharCode(
-                  int.parse(i.substring(2), radix: 16),
-                ),
-                _ => m.group(0)!,
-              },
-            ),
-          ));
         }
         return '';
       },