Find first link, hashtag or mention using a regex and then format that one. This gets all formatted as links.

twister_formatpost.js

@@ -141,12 +141,20 @@ function dmDataToConversationItem(dmData, localUser, remoteUser) {
 // todo: hashtags
 function htmlFormatMsg( msg, output, mentions ) {
     var tmp;
+    var match = null;
+    var index;
+    var reAll = new RegExp("(#|@|http[s]?://)");
+    var reHttp = new RegExp("http[s]?://");
+    
     msg = escapeHtmlEntities(msg);
+
     while( msg != undefined && msg.length ) {
-        var atindex = msg.indexOf("@");
+        
-        if( atindex != -1 ) {
+        match = reAll.exec(msg);
-            output.append(msg.substr(0, atindex));
+        if( match ) {
-            tmp = msg.substr(atindex+1);
+            if( match[0] == "@" ) {
+                output.append(msg.substr(0, match.index));
+                tmp = msg.substr(match.index+1);
                 var username = _extractUsername(tmp);
                 if( username.length ) {
                     if( mentions.indexOf(username) < 0 )
@@ -161,14 +169,9 @@ function htmlFormatMsg( msg, output, mentions ) {
                 }
             }
     
-        var httpindex = msg.indexOf("http://");
+            if( reHttp.exec(match[0]) ) {
-        var httpsindex = msg.indexOf("https://");
+                output.append(msg.substr(0, match.index));
-        if (httpsindex != -1) {
+                tmp = msg.substring(match.index);
-            httpindex = httpsindex;
-        }
-        if( httpindex != -1 ) {
-            output.append(msg.substr(0, httpindex));
-            tmp = msg.substring(httpindex);
                 var space = tmp.indexOf(" ");
                 var url;
                 if( space != -1 ) url = tmp.substring(0,space); else url = tmp;
@@ -184,10 +187,9 @@ function htmlFormatMsg( msg, output, mentions ) {
                 }
             }
     
-        var hashindex = msg.indexOf("#");
+            if( match[0] == "#" ) {
-        if( hashindex != -1 ) {
+                output.append(msg.substr(0, match.index));
-            output.append(msg.substr(0, hashindex));
+                tmp = msg.substr(match.index+1);
-            tmp = msg.substr(hashindex+1);
                 var hashtag = _extractUsername(tmp);
                 if( hashtag.length ) {
                     var hashtagLinkTemplate = $("#hashtag-link-template").clone(true);
@@ -199,6 +201,7 @@ function htmlFormatMsg( msg, output, mentions ) {
                     continue;
                 }
             }
+        }
 
         output.append(msg);
         msg = "";