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

lib/filterListener.js

Index: lib/filterListener.js
===================================================================
--- a/lib/filterListener.js
+++ b/lib/filterListener.js
@@ -24,19 +24,21 @@
 
 const {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
 const {XPCOMUtils} = Cu.import("resource://gre/modules/XPCOMUtils.jsm", {});
 
 const {FilterStorage} = require("./filterStorage");
 const {FilterNotifier} = require("./filterNotifier");
 const {ElemHide} = require("./elemHide");
 const {ElemHideEmulation} = require("./elemHideEmulation");
+const {ElemHideExceptions} = require("./elemHideExceptions");
 const {defaultMatcher} = require("./matcher");
 const {ActiveFilter, RegExpFilter,
-       ElemHideBase, ElemHideEmulationFilter} = require("./filterClasses");
+       ElemHideBase, ElemHideEmulationFilter,
+       ElemHideException} = require("./filterClasses");
 const {Prefs} = require("prefs");
 
 /**
  * Increases on filter changes, filters will be saved if it exceeds 1.
  * @type {number}
  */
 let isDirty = 0;
 
@@ -145,16 +147,18 @@
   }
   if (!hasEnabled)
     return;
 
   if (filter instanceof RegExpFilter)
     defaultMatcher.add(filter);
   else if (filter instanceof ElemHideBase)
   {
+    if (filter instanceof ElemHideException)
+      ElemHideExceptions.add(filter);
     if (filter instanceof ElemHideEmulationFilter)
       ElemHideEmulation.add(filter);
     else
       ElemHide.add(filter);
   }
 }
 
 /**
@@ -178,16 +182,18 @@
     if (hasEnabled)
       return;
   }
 
   if (filter instanceof RegExpFilter)
     defaultMatcher.remove(filter);
   else if (filter instanceof ElemHideBase)
   {
+    if (filter instanceof ElemHideException)
+      ElemHideExceptions.remove(filter);
     if (filter instanceof ElemHideEmulationFilter)
       ElemHideEmulation.remove(filter);
     else
       ElemHide.remove(filter);
   }
 }
 
 const primes = [101, 109, 131, 149, 163, 179, 193, 211, 229, 241];
@@ -302,16 +308,17 @@
 
 function onLoad()
 {
   isDirty = 0;
 
   defaultMatcher.clear();
   ElemHide.clear();
   ElemHideEmulation.clear();
+  ElemHideExceptions.clear();
   for (let subscription of FilterStorage.subscriptions)
   {
     if (!subscription.disabled)
       addFilters(subscription.filters);
   }
 }
 
 function onSave()