Issue 1282 - Show error message when user tries to block whitelisted elements

include.postload.js

Index: include.postload.js
===================================================================
--- a/include.postload.js
+++ b/include.postload.js
@@ -506,15 +506,19 @@
   if (currentElement.classList.contains("__adblockplus__overlay"))
     elt = currentElement.prisoner;
 
-  clickHideFilters = new Array();
-  selectorList = new Array();
+  clickHideFilters = [];
+  elemHideFilters = [];
+  selectorList = [];
 
   var addSelector = function(selector)
   {
     if (selectorList.indexOf(selector) != -1)
       return;
 
-    clickHideFilters.push(document.domain + "##" + selector);
+    var filter = document.domain + "##" + selector;
+    clickHideFilters.push(filter);
+    elemHideFilters.push(filter);
+
     selectorList.push(selector);
   };
 
@@ -558,14 +562,34 @@
       addSelector(escapeCSS(elt.localName) + '[style=' + quote(style) + ']');
   }
 
-  // Show popup
-  clickHide_showDialog(e.clientX, e.clientY, clickHideFilters);
+  ext.backgroundPage.sendMessage(
+    {
+      type: "can-block",
+      urls: urls,
+      mediatype: typeMap[elt.localName],
+      elemHideFilters: elemHideFilters
+    },
 
-  // Highlight the elements specified by selector in yellow
-  if (selectorList.length > 0)
-    highlightElements(selectorList.join(","));
-  // Now, actually highlight the element the user clicked on in red
-  highlightElement(currentElement, "#fd1708", "#f6a1b5");
+    function(response)
+    {
+      if (response.canBlock)
+      {
+        clickHide_showDialog(e.clientX, e.clientY, clickHideFilters);
+
+        // Highlight the elements specified by selector in yellow
+        if (selectorList.length > 0)
+          highlightElements(selectorList.join(","));
+
+        // Now, actually highlight the element the user clicked on in red
+        highlightElement(currentElement, "#fd1708", "#f6a1b5");
+      }
+      else
+      {
+        clickHide_deactivate();
+        alert(response.reason);
+      }
+    }
+  );
 
   // Make sure the browser doesn't handle this click
   e.preventDefault();