Issue 6665 - Split out element hiding exceptions into their own module

lib/elemHideExceptions.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 53 matching lines @@
     let {selector} = exception;
     let list = exceptions.get(selector);
     if (list)
       list.push(exception);
     else
       exceptions.set(selector, [exception]);
 
     knownExceptions.add(exception);
 
     this.emit("added", exception);
+
+    FilterNotifier.emit("elemhideupdate");
   },
 
   /**
    * Removes an element hiding exception
    * @param {ElemHideException} exception
    */
   remove(exception)
   {
     if (!knownExceptions.has(exception))
       return;
 
     let list = exceptions.get(exception.selector);
     let index = list.indexOf(exception);
     if (index >= 0)
       list.splice(index, 1);
 
     knownExceptions.delete(exception);
 
     this.emit("removed", exception);
+
+    FilterNotifier.emit("elemhideupdate");
   },
 
   /**
    * Checks whether any exception rules are registered for a selector
    * @param {string} selector
    * @returns {boolean}
    */
   hasExceptions(selector)
   {
     return exceptions.has(selector);
   },
 
   /**
-   * Checks whether an exception rule is registered for a filter on a particular
-   * domain.
-   * @param {ElemHideFilter|ElemHideEmulationFilter} filter
+   * Checks whether an exception rule is registered for a selector on a
+   * particular domain.
+   * @param {string} selector
    * @param {?string} docDomain
    * @return {?ElemHideException}
    */
-  getException(filter, docDomain)
+  getException(selector, docDomain)
   {
-    let list = exceptions.get(filter.selector);
+    let list = exceptions.get(selector);
     if (!list)
       return null;
 
     for (let i = list.length - 1; i >= 0; i--)
     {
       if (list[i].isActiveOnDomain(docDomain))
         return list[i];
     }
 
     return null;
   }
 });