Just adding a new file to the tree. THIS IS NOT PART OF ANY BUILD!

layout/base/public/nsIPrintListener.idl

@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1999 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s): 
+ */
+
+#include "nsISupports.idl"
+
+[scriptable, uuid(DB8D9F25-F183-11d3-8F9F-00A024A7D144)]
+
+/*  Use this for any object that wants to listen to print requests */
+
+interface nsIPrintListener :  nsISupports
+{
+	void OnStartPrinting();
+	void OnProgressPrinting(in PRUint32 aProgress, in PRUint32 aProgressMax);
+	void OnEndPrinting(in PRUint32 aStatus);
+};