#include <xpcom-config.h>
#include <nsCOMPtr.h>
#include <nsIContent.h>
#include <nsIObserverService.h>
#include <nsStringAPI.h>
#include <nsDebug.h>
#include <nsComponentManagerUtils.h>
#include <nsIInterfaceRequestorUtils.h>
#include <nsServiceManagerUtils.h>
#include <nsIWidget.h>
#include <nsIWindowMediator.h>
#include <nsIBaseWindow.h>
#include <nsIXULWindow.h>
#include <nsIDOMWindowUtils.h>
#include <nsIDocShell.h>
#include <nsIDocShellTreeItem.h>
#include <nsIDocShellTreeOwner.h>
#include <prenv.h>

#include <glib-object.h>     
#include <gdk/gdk.h>
#include <gdk/gdkx.h>

guint32
get_base_window_xid (nsCOMPtr<nsIBaseWindow> baseWindow)
{
  nsCOMPtr<nsIWidget> mainWidget;
  baseWindow->GetMainWidget(getter_AddRefs(mainWidget));
  if (!mainWidget)
    return 0;
  
  GdkWindow *window = static_cast<GdkWindow *>(mainWidget->GetNativeData(NS_NATIVE_WINDOW));
  if (!window)
    return 0;

  window = gdk_window_get_toplevel(window);
  
  return GDK_WINDOW_XID (window);

}

extern "C" {

guint32
get_xid_for_outer_window_with_id (guint32 id)
{
  nsCOMPtr<nsIWindowMediator> wm =
    do_GetService("@mozilla.org/appshell/window-mediator;1");
  
  if (!wm)
    return 0;

  nsCOMPtr<nsIDOMWindow> recentWindow;
  wm->GetMostRecentWindow(NULL, getter_AddRefs(recentWindow));
  
  if (!recentWindow)
    return 0;

  nsCOMPtr<nsIDOMWindowUtils> domWindowUtils = do_GetInterface(recentWindow);

  if (!domWindowUtils)
    return 0;

  nsCOMPtr<nsIDOMWindow> windowWithID;
  domWindowUtils->GetOuterWindowWithId(id, getter_AddRefs(windowWithID));
  
  if (!windowWithID)
    return 0;

  nsCOMPtr<nsPIDOMWindow> pWindow = do_QueryInterface(windowWithID);
  
  if (!pWindow)
    return 0;

  nsIDocShell *docShell = pWindow->GetDocShell();
  
  if (!docShell)
    return 0;

  nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = do_GetInterface(docShell);
  
  if (!docShellTreeItem)
    return 0;

  nsCOMPtr<nsIDocShellTreeOwner> docShellTreeOwner;
  docShellTreeItem->GetTreeOwner(getter_AddRefs(docShellTreeOwner));
  
  if (!docShellTreeOwner)
    return 0;

  nsCOMPtr<nsIBaseWindow> baseWindow = do_QueryInterface(docShellTreeOwner);
  
  if (!baseWindow)
    return 0;
  
  return get_base_window_xid (baseWindow);
}

}