Issue 6652 - Do not push to unconditional selectors array

lib/elemHide.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 48 matching lines @@
  */
 let knownFilters = new Set();
 
 /**
  * Lookup table, lists of element hiding exceptions by selector
  * @type {Map.<string,Filter>}
  */
 let exceptions = new Map();
 
 /**
+ * Adds a filter to the lookup table of filters by domain.
+ * @param {Filter}
+ */
+function addToFiltersByDomain(filter)
+{
+  let domains = filter.domains || defaultDomains;
+  for (let [domain, isIncluded] of domains)
+  {
+    // There's no need to note that a filter is generically disabled.
+    if (!isIncluded && domain == "")
+      continue;
+
+    let filters = filtersByDomain.get(domain);
+    if (!filters)
+      filtersByDomain.set(domain, filters = new Map());
+    filters.set(filter, isIncluded);
+  }
+}
+
+/**
  * Returns a list of selectors that apply on each website unconditionally.
  * @returns {string[]}
  */
 function getUnconditionalSelectors()
 {
   if (!unconditionalSelectors)
     unconditionalSelectors = [...filterBySelector.keys()];
 
   return unconditionalSelectors;
 }
 
 /**
  * Container for element hiding filters
  * @class
  */
 let ElemHide = exports.ElemHide = {
   /**
    * Removes all known filters
    */
   clear()
   {
     for (let collection of [filtersByDomain, filterBySelector,
                             knownFilters, exceptions])
     {
       collection.clear();
     }
     unconditionalSelectors = null;
     FilterNotifier.emit("elemhideupdate");
-  },
-
-  _addToFiltersByDomain(filter)
-  {
-    let domains = filter.domains || defaultDomains;
-    for (let [domain, isIncluded] of domains)
-    {
-      // There's no need to note that a filter is generically disabled.
-      if (!isIncluded && domain == "")
-        continue;
-
-      let filters = filtersByDomain.get(domain);
-      if (!filters)
-        filtersByDomain.set(domain, filters = new Map());
-      filters.set(filter, isIncluded);
-    }
   },
 
   /**
    * Add a new element hiding filter
    * @param {ElemHideBase} filter
    */
   add(filter)
   {
     if (knownFilters.has(filter))
       return;
 
     if (filter instanceof ElemHideException)
     {
       let {selector} = filter;
       let list = exceptions.get(selector);
       if (list)
         list.push(filter);
       else
         exceptions.set(selector, [filter]);
 
       // If this is the first exception for a previously unconditionally
       // applied element hiding selector we need to take care to update the
       // lookups.
       let unconditionalFilterForSelector = filterBySelector.get(selector);
       if (unconditionalFilterForSelector)
       {
-        this._addToFiltersByDomain(unconditionalFilterForSelector);
+        addToFiltersByDomain(unconditionalFilterForSelector);
         filterBySelector.delete(selector);
         unconditionalSelectors = null;
       }
     }
     else if (!(filter.domains || exceptions.has(filter.selector)))
     {
       // The new filter's selector is unconditionally applied to all domains
       filterBySelector.set(filter.selector, filter);
       unconditionalSelectors = null;
     }
     else
     {
       // The new filter's selector only applies to some domains
-      this._addToFiltersByDomain(filter);
+      addToFiltersByDomain(filter);
     }
 
     knownFilters.add(filter);
     FilterNotifier.emit("elemhideupdate");
   },
 
   /**
    * Removes an element hiding filter
    * @param {ElemHideBase} filter
    */
@@ skipping 126 matching lines @@
       let nextDot = currentDomain.indexOf(".");
       currentDomain = nextDot == -1 ? "" : currentDomain.substr(nextDot + 1);
     }
 
     if (criteria < ElemHide.NO_UNCONDITIONAL)
       selectors = getUnconditionalSelectors().concat(selectors);
 
     return selectors;
   }
 };