Issue 6538, 6781 - Implement script parsing for snippets

lib/snippets.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 72 matching lines @@
 /**
  * Parses a script and returns a list of all its commands and their arguments
  * @param {string} script
  * @return {Array.<string[]>}
  */
 function parseScript(script)
 {
   let tree = [];
 
   let escape = false;
-  let literal = false;
+  let withinQuotes = false;
 
   let unicodeEscape = null;
 
   let call = [];
   let argument = "";
 
   for (let character of script.trim() + ";")
   {
     if (unicodeEscape != null)
     {
@@ skipping 16 matching lines @@
         unicodeEscape = "";
       else
         argument += singleCharacterEscapes.get(character) || character;
     }
     else if (character == "\\")
     {
       escape = true;
     }
     else if (character == "'")
     {
-      literal = !literal;
+      withinQuotes = !withinQuotes;
     }
-    else if (literal || character != ";" && !/\s/u.test(character))
+    else if (withinQuotes || character != ";" && !/\s/u.test(character))
     {
       argument += character;
     }
     else
     {
       if (argument)
       {
         call.push(argument);
         argument = "";
       }
 
       if (character == ";" && call.length > 0)
       {
         tree.push(call);
         call = [];
       }
     }
   }
 
   return tree;
 }
 
 exports.parseScript = parseScript;