Embedding/NewApi/XpcomAccess

Access to underlying XPCOM API

MozView provides a GetInterfaceRequestor() method for accessing the underlying API. This returns an InterfaceRequestor which you can use to get access to the XPCOM object you need.

NOTE: currently it is the InterfaceRequestor from nsIWebBrowser which is returned and thus the interfaces from that which is accessible.

DOM access sample

Here is an example of using this for DOM access:

  // pointer to your MozView
  MozView* pMozView;
  ...
  nsCOMPtr<nsIInterfaceRequestor> requestor;
  pMozView->GetInterfaceRequestor(getter_AddRefs(requestor));
  nsCOMPtr<nsIDOMDocument> doc = do_GetInterface(requestor);

Gets a nsIDOMDocument from the MozView

  nsCOMPtr<nsIDOMHTMLDocument> htmldoc = do_QueryInterface(doc);

Use QI to get the nsIDOMHTMLDocument. Note, that we can't do this directly from the InterfaceRequestor as it will only give us the nsIDOMDocument.

  if (htmldoc)
  {
    nsCOMPtr<nsIDOMNode> retval;
    nsCOMPtr<nsIDOMHTMLElement> body;
    htmldoc->GetBody(getter_AddRefs(body));
    nsCOMPtr<nsIDOMElement> newdiv;
    doc->CreateElement(NS_LITERAL_STRING("div"), getter_AddRefs(newdiv));
    nsCOMPtr<nsIDOMElement> newhr;
    doc->CreateElement(NS_LITERAL_STRING("hr"), getter_AddRefs(newhr));
    newdiv->AppendChild(newhr, getter_AddRefs(retval));
    nsCOMPtr<nsIDOMText> text;
    doc->CreateTextNode(NS_LITERAL_STRING("Provided by MozEmbed"), getter_AddRefs(text));
    newdiv->AppendChild(text, getter_AddRefs(retval));
    body->AppendChild(newdiv, getter_AddRefs(retval));
  }

If we get a valid nsIDOMHTMLDocument, use it to append a div to the body containing a hr and some text.