Added some commented out code to illustrate how we might potentially obtain the held docShell object from the htmlinnerframe.

rdf/content/src/nsXULIFrameElement.cpp

@@ -78,4 +78,58 @@ nsXULIFrameElement::GetDocShell(nsIDocShell** aDocShell)
    NS_ERROR("Not Yet Implemented");
 
    return NS_OK;
+/*
+
+  nsresult rv = NS_OK;
+
+  nsCOMPtr<nsIContent> content(do_QueryInterface(mOuter));
+  nsCOMPtr<nsIDocument> document;
+  content->GetDocument(*getter_AddRefs(document));
+
+  // First we need to obtain the popup set frame that encapsulates the target popup.
+  // Without a popup set, we're dead in the water.
+  nsCOMPtr<nsIPresShell> presShell = getter_AddRefs(document->GetShellAt(0));
+  if (!presShell)
+    return NS_OK;
+
+  // Get the parent of the popup content.
+  nsCOMPtr<nsIDOMNode> popupSet;
+  mOuter->GetParentNode(getter_AddRefs(popupSet));
+  if (!popupSet)
+    return NS_OK;
+
+  // Do a sanity check to ensure we have a popup set or menu element.
+  nsString tagName;
+  nsCOMPtr<nsIDOMElement> popupSetElement = do_QueryInterface(popupSet);
+  popupSetElement->GetTagName(tagName);
+  if (tagName != "popupset" && tagName != "menu")
+    return NS_OK;
+
+  // Now obtain the popup set frame.
+  nsCOMPtr<nsIContent> popupSetContent = do_QueryInterface(popupSet);
+  nsIFrame* frame;
+  presShell->GetPrimaryFrameFor(popupSetContent, &frame);  
+  if (!frame)
+    return NS_OK;
+
+  // Obtain the element frame.
+  nsCOMPtr<nsIContent> elementContent = do_QueryInterface(aElement);
+  nsIFrame* elementFrame;
+  presShell->GetPrimaryFrameFor(elementContent, &elementFrame);  
+  if (!elementFrame)
+    return NS_OK;
+
+  //XXX Once we have the frame we need to get to the inner frame and then 
+  // extract the object the inner frame is holding on to.
+  
+  nsCOMPtr<nsIHTMLInnerFrame> innerFrame;
+  elementFrame->GetInnerFrame(getter_AddRefs(innerFrame));
+
+  nsCOMPtr<nsIHTMLIFrameInnerFrame> iframeInnerFrame(do_QueryInterface(innerFrame));
+  if(!iframeInnerFrame)
+    return NS_OK;
+
+  iframeInnerFrame->GetDocShell(aDocShell);
+
+  return NS_OK; */
 }