Issue 6538, 6781 - Implement support for snippet filters

lib/elemHide.js

Index: lib/elemHide.js
===================================================================
--- a/lib/elemHide.js
+++ b/lib/elemHide.js
@@ -103,38 +103,38 @@
    */
   add(filter)
   {
     if (knownFilters.has(filter))
       return;
 
     if (filter instanceof ElemHideException)
     {
-      let {selector} = filter;
-      let list = exceptions.get(selector);
+      let {code} = filter;
+      let list = exceptions.get(code);
       if (list)
         list.push(filter);
       else
-        exceptions.set(selector, [filter]);
+        exceptions.set(code, [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);
+      let unconditionalFilterForSelector = filterBySelector.get(code);
       if (unconditionalFilterForSelector)
       {
         this._addToFiltersByDomain(unconditionalFilterForSelector);
-        filterBySelector.delete(selector);
+        filterBySelector.delete(code);
         unconditionalSelectors = null;
       }
     }
-    else if (!(filter.domains || exceptions.has(filter.selector)))
+    else if (!(filter.domains || exceptions.has(filter.code)))
     {
       // The new filter's selector is unconditionally applied to all domains
-      filterBySelector.set(filter.selector, filter);
+      filterBySelector.set(filter.code, filter);
       unconditionalSelectors = null;
     }
     else
     {
       // The new filter's selector only applies to some domains
       this._addToFiltersByDomain(filter);
     }
 
@@ -149,25 +149,25 @@
   remove(filter)
   {
     if (!knownFilters.has(filter))
       return;
 
     // Whitelisting filters
     if (filter instanceof ElemHideException)
     {
-      let list = exceptions.get(filter.selector);
+      let list = exceptions.get(filter.code);
       let index = list.indexOf(filter);
       if (index >= 0)
         list.splice(index, 1);
     }
     // Unconditially applied element hiding filters
-    else if (filterBySelector.get(filter.selector) == filter)
+    else if (filterBySelector.get(filter.code) == filter)
     {
-      filterBySelector.delete(filter.selector);
+      filterBySelector.delete(filter.code);
       unconditionalSelectors = null;
     }
     // Conditionally applied element hiding filters
     else
     {
       let domains = filter.domains || defaultDomains;
       for (let domain of domains.keys())
       {
@@ -185,17 +185,17 @@
    * Checks whether an exception rule is registered for a filter on a particular
    * domain.
    * @param {Filter} filter
    * @param {string} docDomain
    * @return {ElemHideException}
    */
   getException(filter, docDomain)
   {
-    let list = exceptions.get(filter.selector);
+    let list = exceptions.get(filter.code);
     if (!list)
       return null;
 
     for (let i = list.length - 1; i >= 0; i--)
     {
       if (list[i].isActiveOnDomain(docDomain))
         return list[i];
     }
@@ -269,17 +269,17 @@
         {
           if (!isIncluded)
           {
             excluded.add(filter);
           }
           else if ((excluded.size == 0 || !excluded.has(filter)) &&
                    !this.getException(filter, domain))
           {
-            selectors.push(filter.selector);
+            selectors.push(filter.code);
           }
         }
       }
 
       if (currentDomain == "")
         break;
 
       let nextDot = currentDomain.indexOf(".");