Bug 1143972. Return 0,0 for offsetX/Y when the document has no presentation. r=mats

--HG-- extra : rebase_source : a80f1aa79a94ec48342b127fae35022eb3978835
2015-03-18 02:04:32 +13:00 · 2015-03-18 02:04:32 +13:00 · fc9c32b6a2
--- a/dom/events/Event.cpp
+++ b/dom/events/Event.cpp
@ -980,7 +980,7 @@ Event::GetOffsetCoords(nsPresContext* aPresContext,
    return GetPageCoords(aPresContext, aEvent, aPoint, aDefaultPoint);
  }
  nsCOMPtr<nsIContent> content = do_QueryInterface(aEvent->target);
-  if (!content) {
+  if (!content || !aPresContext) {
    return CSSIntPoint(0, 0);
  }
  nsCOMPtr<nsIPresShell> shell = aPresContext->GetPresShell();
--- a/dom/events/crashtests/1143972-1.html
+++ b/dom/events/crashtests/1143972-1.html
@ -0,0 +1,12 @@
+<!DOCTYPE HTML>
+<script>
+var x;
+function doTest() {
+  f.contentDocument.body.onclick = function (event) {
+    x = event.offsetX;
+  }
+  f.contentDocument.body.dispatchEvent(f.contentWindow.ev);
+}
+</script>
+<iframe id="f" style="display:none" onload="doTest()"
+        src="data:text/html,<script>var ev = new MouseEvent('click', {clientX:0, clientY:0})</script>"></iframe>
--- a/dom/events/crashtests/crashtests.list
+++ b/dom/events/crashtests/crashtests.list
@ -8,6 +8,7 @@ load 682637-1.html
 load 1033343.html
 load 1035654-1.html
 load 1035654-2.html
+load 1143972-1.html
 needs-focus load 1072137-1.html
 load eventctor-nulldictionary.html
 load eventctor-nullstorage.html