Issue 6868 - Enable capturing of surrounding wildcards for rewrite filters

lib/common.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 14 matching lines @@
 function textToRegExp(text)
 {
   return text.replace(/[-/\\^$*+?.()|[\]{}]/g, "\\$&");
 }
 
 exports.textToRegExp = textToRegExp;
 
 /**
  * Converts filter text into regular expression string
  * @param {string} text as in Filter()
- * @param {boolean} [optimize=true] whether to optimize the regular expression
+ * @param {boolean} [captureAll=false] whether to enable the capturing of
+ *   leading and trailing wildcards in the filter text; by default, leading and
+ *   trailing wildcards are stripped out
  * @return {string} regular expression representation of filter text
  */
-function filterToRegExp(text, optimize = true)
-{
-  if (optimize)
-  {
-    // remove multiple wildcards
-    text = text.replace(/\*+/g, "*");
-
+function filterToRegExp(text, captureAll = false)
+{
+  // remove multiple wildcards
+  text = text.replace(/\*+/g, "*");
+
+  if (!captureAll)
+  {
     // remove leading wildcard
     if (text[0] == "*")
       text = text.substring(1);
 
     // remove trailing wildcard
     if (text[text.length - 1] == "*")
       text = text.substring(0, text.length - 1);
   }
 
   return text
@@ skipping 150 matching lines @@
     // Note that the first group in the regular expression is optional. If it
     // doesn't match (e.g. "#foo::nth-child(1)"), type will be an empty string.
     qualifiedSelector += sub.substr(0, index) + type + qualifier + rest;
   }
 
   // Remove the initial comma and space.
   return qualifiedSelector.substr(2);
 }
 
 exports.qualifySelector = qualifySelector;