From 5843b3037fa10700718d9e062cba6b1ef215adf1 Mon Sep 17 00:00:00 2001
From: Toks <tttoksss@gmail.com>
Date: Fri, 12 Apr 2013 18:00:57 -0400
Subject: [PATCH] fix regexp in reltag toggle

should account for all special characters while preserving newlines
---
 app/assets/javascripts/related_tag.js | 3 ++-
 app/assets/javascripts/utility.js     | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/app/assets/javascripts/related_tag.js b/app/assets/javascripts/related_tag.js
index 554873b73..8f6c01705 100644
--- a/app/assets/javascripts/related_tag.js
+++ b/app/assets/javascripts/related_tag.js
@@ -194,7 +194,8 @@
     var tag = $(e.target).html().replace(/ /g, "_").replace(/&gt;/g, ">").replace(/&lt;/g, "<").replace(/&amp;/g, "&");
 
     if ($.inArray(tag, tags) > -1) {
-      $field.val($field.val().replace(new RegExp("\\b" + tag + "\\b", "gi"), " "));
+      var escaped_tag = Danbooru.regexp_escape(tag);
+      $field.val($field.val().replace(new RegExp("(^|\\s)" + escaped_tag + "($|\\s)", "gi"), "$1$2"));
     } else {
       $field.val($field.val() + " " + tag);
     }
diff --git a/app/assets/javascripts/utility.js b/app/assets/javascripts/utility.js
index 729534db4..fd0761649 100644
--- a/app/assets/javascripts/utility.js
+++ b/app/assets/javascripts/utility.js
@@ -74,6 +74,10 @@
     return filtered;
   }
 
+  Danbooru.regexp_escape = function(string) {
+    return string.replace(/([.?*+^$[\]\\(){}|-])/g, "\\$1");
+  }
+
   $.fn.selectRange = function(start, end) {
     return this.each(function() {
       if (this.setSelectionRange) {