Issue 1282 - Let user-defined filters override filter lists

lib/filterClasses.js

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2014 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 31 matching lines @@
    */
   text: null,
 
   /**
    * Filter subscriptions the filter belongs to
    * @type Array of Subscription
    */
   subscriptions: null,
 
   /**
+   * Whether this is a user-defined filter
+   * @type Boolean
+   */
+  get isUserDefined()
+  {
+    let {SpecialSubscription} = require("subscriptionClasses");
+    let isUserDefined = this.subscriptions.some(s => s instanceof SpecialSubscription);
+
+    Object.defineProperty(this, "isUserDefined", {value: isUserDefined});
+    return isUserDefined;
+  },
+
+  /**
    * Serializes the filter to an array of strings for writing out on the disk.
    * @param {Array of String} buffer  buffer to push the serialization results into
    */
   serialize: function(buffer)
   {
     buffer.push("[Filter]");
     buffer.push("text=" + this.text);
   },
 
   toString: function()
@@ skipping 878 matching lines @@
 function ElemHideException(text, domains, selector)
 {
   ElemHideBase.call(this, text, domains, selector);
 }
 exports.ElemHideException = ElemHideException;
 
 ElemHideException.prototype =
 {
   __proto__: ElemHideBase.prototype
 };