Issue 1381 - Element hiding exceptions broken after #432 landing

lib/contentPolicy.js

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2014 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 171 matching lines @@
     }
 
     // Data loaded by plugins should be attached to the document
     if (contentType == Policy.type.OBJECT_SUBREQUEST && node instanceof Ci.nsIDOMElement)
       node = node.ownerDocument;
 
     // Fix type for objects misrepresented as frames or images
     if (contentType != Policy.type.OBJECT && (node instanceof Ci.nsIDOMHTMLObjectElement || node instanceof Ci.nsIDOMHTMLEmbedElement))
       contentType = Policy.type.OBJECT;
 
+    let thirdParty = (contentType == Policy.type.ELEMHIDE ? false : isThirdParty(location, docDomain));

[Thomas Greiner, 2014/09/18 12:45:37]

I'm sure you tried it out but I don't see how moving it upwards in the same
block eliminates the error message "ReferenceError: can't access let declaration
'thirdParty' before initialization" or why this would be related to #432.

[Wladimir Palant, 2014/09/18 12:56:22]

That variable is being accessed in line 227/228 below - that line executes
before the variable declaration.

You are right however, while #432 changed that code last this issue was present
earlier as well. I guess that Firefox simply got stricter about let variables.

[Thomas Greiner, 2014/09/18 13:15:10]

Got it, I guess I relied to much on the browser search feature here which can't
deal with line breaks.

On 2014/09/18 12:56:22, Wladimir Palant wrote:

[Wladimir Palant, 2014/09/18 13:26:16]

The browser search feature is fine, it's actually Rietveld's markup :) Try to
copy that text and you will see.

     let locationText = location.spec;
     if (!match && contentType == Policy.type.ELEMHIDE)
     {
       let testWnd = wnd;
       let parentWndLocation = getWindowLocation(testWnd);
       while (true)
       {
         let testWndLocation = parentWndLocation;
         parentWndLocation = (testWnd == testWnd.parent ? testWndLocation : getWindowLocation(testWnd.parent));
         let parentDocDomain = getHostname(parentWndLocation);
@@ skipping 20 matching lines @@
 
       let exception = ElemHide.getException(match, docDomain);
       if (exception)
       {
         FilterStorage.increaseHitCount(exception, wnd);
         RequestNotifier.addNodeData(node, topWnd, contentType, docDomain, thirdParty, locationText, exception);
         return true;
       }
     }
 
-    let thirdParty = (contentType == Policy.type.ELEMHIDE ? false : isThirdParty(location, docDomain));
-
     if (!match && Prefs.enabled)
     {
       match = defaultMatcher.matchesAny(locationText, Policy.typeDescr[contentType] || "", docDomain, thirdParty, sitekey);
       if (match instanceof BlockingFilter && node.ownerDocument && !(contentType in Policy.nonVisual))
       {
         let prefCollapse = (match.collapse != null ? match.collapse : !Prefs.fastcollapse);
         if (collapse || prefCollapse)
           schedulePostProcess(node);
       }
 
@@ skipping 535 matching lines @@
   if (!wnd || wnd.closed)
     return;
 
   if (entry.type == Policy.type.OBJECT)
   {
     node.removeEventListener("mouseover", objectMouseEventHander, true);
     node.removeEventListener("mouseout", objectMouseEventHander, true);
   }
   Policy.processNode(wnd, node, entry.type, Utils.makeURI(entry.location), true);
 }