From d67c3b162dc10fc5fc94298edcc11bb7359c2fa2 Mon Sep 17 00:00:00 2001
From: Erik Arvidsson <arv@chromium.org>
Date: Wed, 14 May 2014 15:27:43 -0400
Subject: [PATCH] Fix issue with elementFromPoint when null

Fixes #434
---
 src/wrappers/events.js | 2 ++
 test/js/Document.js    | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/src/wrappers/events.js b/src/wrappers/events.js
index e90ecc5..b25d999 100644
--- a/src/wrappers/events.js
+++ b/src/wrappers/events.js
@@ -826,6 +826,8 @@
     scope.renderAllPending();
 
     var element = wrap(originalElementFromPoint.call(document.impl, x, y));
+    if (!element)
+      return null;
     var path = getEventPath(element, null);
     return eventRetargetting(path, self);
   }
diff --git a/test/js/Document.js b/test/js/Document.js
index c2422bc..a036b62 100644
--- a/test/js/Document.js
+++ b/test/js/Document.js
@@ -315,6 +315,13 @@ htmlSuite('Document', function() {
     assert.equal(doc.elementFromPoint(5, 5), div);
   });
 
+  test('elementFromPoint null', function() {
+    assert.isNull(document.elementFromPoint(-9999, -9999));
+
+    var doc = wrap(document);
+    assert.isNull(doc.elementFromPoint(-9999, -9999));
+  });
+
   test('document.contains', function() {
     assert.isTrue(document.contains(document.body));
     assert.isTrue(document.contains(document.querySelector('body')));