From f141d6f76924594b40dfc7ae3339ebdcfe1d0df2 Mon Sep 17 00:00:00 2001
From: Raymond Hill <rhill@raymondhill.net>
Date: Wed, 26 Nov 2014 17:26:33 -0200
Subject: [PATCH] fixed overzealous cosmetic filter bug introduced in #365

---
 src/js/contentscript-end.js   | 16 +++++++++++++---
 src/js/contentscript-start.js | 16 +++++++++-------
 2 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/src/js/contentscript-end.js b/src/js/contentscript-end.js
index ae7867bf2..6eeda9f80 100644
--- a/src/js/contentscript-end.js
+++ b/src/js/contentscript-end.js
@@ -43,7 +43,7 @@ var messager = vAPI.messaging.channel('contentscript-end.js');
 
 (function() {
     var queriedSelectors = {};
-    var injectedSelectors = vAPI.injectedCosmeticFilters || {};
+    var injectedSelectors = vAPI.hideCosmeticFilters || {};
     var classSelectors = null;
     var idSelectors = null;
     var highGenerics = null;
@@ -55,9 +55,19 @@ var messager = vAPI.messaging.channel('contentscript-end.js');
         // Ensure injected styles are enforced
         // rhill 2014-11-16: not sure this is needed anymore. Test case in
         //  above issue was fine without the line below..
-        if ( vAPI.injectedCosmeticFilters ) {
-            hideElements(Object.keys(vAPI.injectedCosmeticFilters).join(','));
+        if ( vAPI.hideCosmeticFilters ) {
+            hideElements(Object.keys(vAPI.hideCosmeticFilters).join(','));
         }
+        // Add exception filters into injected filters collection, in order
+        // to force them to be seen as "already injected".
+        var donthideCosmeticFilters = vAPI.donthideCosmeticFilters;
+        for ( var selector in donthideCosmeticFilters ) {
+            if ( donthideCosmeticFilters.hasOwnProperty(selector) === false ) {
+                continue;
+            }
+            injectedSelectors[selector] = true;
+        }
+        // Now scan content of page
         idsFromNodeList(document.querySelectorAll('[id]'));
         classesFromNodeList(document.querySelectorAll('[class]'));
         retrieveGenericSelectors();
diff --git a/src/js/contentscript-start.js b/src/js/contentscript-start.js
index 533706df2..aed3f4f53 100644
--- a/src/js/contentscript-start.js
+++ b/src/js/contentscript-start.js
@@ -22,8 +22,6 @@
 /* jshint multistr: true */
 /* global vAPI */
 
-'use strict';
-
 /******************************************************************************/
 
 // Injected into content pages
@@ -32,6 +30,8 @@
 
 (function() {
 
+'use strict';
+
 /******************************************************************************/
 
 // because Safari
@@ -55,7 +55,8 @@ var cosmeticFilters = function(details) {
     if ( style !== null ) {
         return;
     }
-    var injectedCosmeticFilters = {};
+    var donthideCosmeticFilters = {};
+    var hideCosmeticFilters = {};
     style = document.createElement('style');
     style.setAttribute('id', 'ublock-preload-1ae7a5f130fc79b4fdb8a4272d9426b5');
     var donthide = details.cosmeticDonthide;
@@ -65,7 +66,7 @@ var cosmeticFilters = function(details) {
         donthide = donthide.split(',\n');
         var i = donthide.length;
         while ( i-- ) {
-            injectedCosmeticFilters[donthide[i]] = true;
+            donthideCosmeticFilters[donthide[i]] = true;
         }
         // https://github.com/gorhill/uBlock/issues/143
         if ( hide.length !== 0 ) {
@@ -75,10 +76,10 @@ var cosmeticFilters = function(details) {
             var selector;
             while ( i-- ) {
                 selector = hide[i];
-                if ( injectedCosmeticFilters[selector] ) {
+                if ( donthideCosmeticFilters[selector] ) {
                     hide.splice(i, 1);
                 } else {
-                    injectedCosmeticFilters[selector] = true;
+                    hideCosmeticFilters[selector] = true;
                 }
             }
         }
@@ -94,7 +95,8 @@ var cosmeticFilters = function(details) {
     if ( parent ) {
         parent.appendChild(style);
     }
-    vAPI.injectedCosmeticFilters = injectedCosmeticFilters;
+    vAPI.donthideCosmeticFilters = donthideCosmeticFilters;
+    vAPI.hideCosmeticFilters = hideCosmeticFilters;
 };
 
 var netFilters = function(details) {