From 28d096445dc9df5e6b90a0f6e2422731ccd3aab1 Mon Sep 17 00:00:00 2001
From: Arthur Rosa <arthur@rosafamily.net>
Date: Sun, 18 Aug 2024 18:09:01 -0700
Subject: [PATCH] fix: Modifying MENTION_START regex to work on older
 MobileSafari versions

Fixes RichText causes errors on WebKit | Invalid regex #5589

This regex performs the same function as the one used before, but does not make use of negative lookbehinds and therefore should work on older MobileSafari versions.

Co-authored-by: Maksim Sukharev <antreesy.web@gmail.com>
Signed-off-by: Arthur Rosa <arthur@rosafamily.net>
---
 src/mixins/richEditor/index.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mixins/richEditor/index.js b/src/mixins/richEditor/index.js
index c14ed08f46..0401698474 100644
--- a/src/mixins/richEditor/index.js
+++ b/src/mixins/richEditor/index.js
@@ -11,8 +11,8 @@ import stripTags from 'striptags'
 import { createApp } from 'vue'
 
 // Referenced from public function getMentions(): https://github.com/nextcloud/server/blob/master/lib/private/Comments/Comment.php
-// Beginning or whitespace. Non-capturing group within word boundary
-const MENTION_START = /\B(?<![^a-z0-9_\-@.'\s])/.source
+// Beginning or whitespace. Uses positive lookahead (to work on MobileSafari <16.4)
+const MENTION_START = /(?=[a-z0-9_\-@.'])\B/.source
 // Capturing groups like: @user-id, @"guest/abc16def", @"federated_user/user-id", @"user-id with space"
 const MENTION_SIMPLE = /(@[a-z0-9_\-@.']+)/.source
 const MENTION_GUEST = /@&quot;guest\/[a-f0-9]+&quot;/.source