Issue 1853 - Moved filter generation into background page

lib/filterComposer.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 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 16 matching lines @@
   // char code as well.
   if (code <= 0x1F || code == 0x7F || /[\d\{\}]/.test(chr))
     return "\\" + code.toString(16) + " ";
 
   return "\\" + chr;
 }
 
 /**
  * Escapes a token (e.g. tag, id, class or attribute) to be used in CSS selectors.
  *
- * @param {string} [s]
+ * @param {string} s
  * @return {string}
  */
 function escapeCSS(s)
 {
   return s.replace(/^[\d\-]|[^\w\-\u0080-\uFFFF]/g, escapeChar);
 }
 exports.escapeCSS = escapeCSS;
 
 /**
  * Quotes a string to be used as attribute value in CSS selectors.
  *
- * @param {string} [value]
+ * @param {string} value
  * @return {string}
  */
 function quoteCSS(value)
 {
   return '"' + value.replace(/["\\\{\}\x00-\x1F\x7F]/g, escapeChar) + '"';
 }
 exports.quoteCSS = quoteCSS;
 
 function canBlockURL(url)
 {
   return url.protocol == "http:" || url.protocol == "https:";
 }
 
 /**
  * Generates filters to block an element.
  *
- * @param {string}   [tagName] The element's tag name
- * @param {string}   [src]     The element's "src" attribute (can be null)
- * @param {string}   [id]      The element's "id" attribute (can be null)
- * @param {string}   [style]   The element's "style" attribute (can be null)
- * @param {string[]} [classes] The classes given by the element's "class" attribute
- * @param {string[]} [urls]    The URLs considered when loading the element
- * @param {URL}      [baseURL] The URL of the document containing the element
+ * @param {string}   tagName  The element's tag name
+ * @param {string}   [src]    The element's "src" attribute
+ * @param {string}   [id]     The element's "id" attribute
+ * @param {string}   [style]  The element's "style" attribute
+ * @param {string[]} classes  The classes given by the element's "class" attribute
+ * @param {string[]} urls     The URLs considered when loading the element
+ * @param {URL}      baseURL  The URL of the document containing the element
  *
  * @return {object} An object holding the list of generated filters and
  *                  the list of CSS selectors for the included element
  *                  hiding filters: {filters: [...], selectors: [...]}
  */
 function composeFilters(tagName, id, src, style, classes, urls, baseURL)
 {
   // Add a blocking filter for each HTTP(S) URL associated with the element
   let filters = [];
   for (let url of urls)
@@ skipping 30 matching lines @@
   {
     let domain = getDecodedHostname(baseURL).replace(/^www\./, "");
 
     for (let selector of selectors)
       filters.push(domain + "##" + selector);
   }
 
   return {filters: filters, selectors: selectors};
 }
 exports.composeFilters = composeFilters;