/* -*- Mode: IDL; 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) 1998-1999 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */

#include "nsISupports.idl"
#include "nsIEnumerator.idl"
#include "MailNewsTypes2.idl"

interface nsIMsgDBHdr;
interface nsIMsgHdr;

interface nsIDBChangeAnnouncer;

[scriptable, uuid(df64af90-e2da-11d2-8d6c-00805f8a6617)]
interface nsIMsgThread : nsISupports {
  attribute nsMsgKey threadKey;
  attribute unsigned long flags;
  attribute string subject;
  readonly attribute unsigned long numChildren;
  readonly attribute unsigned long numUnreadChildren;

  void AddChild(in nsIMsgDBHdr child, in nsIMsgDBHdr inReplyTo, in boolean threadInThread, in nsIDBChangeAnnouncer announcer);
  nsIMsgDBHdr GetChildAt(in long index);
  nsIMsgDBHdr GetChild(in nsMsgKey msgKey);
  nsIMsgDBHdr GetChildHdrAt(in long index);
  nsIMsgDBHdr GetRootHdr(out long index);
  void RemoveChildAt(in long index);
  void RemoveChildHdr(in nsIMsgDBHdr child, in nsIDBChangeAnnouncer announcer);

  void MarkChildRead(in boolean bRead);

  nsISimpleEnumerator EnumerateMessages(in nsMsgKey parent);
  nsISimpleEnumerator EnumerateUnreadMessages(in nsMsgKey parent);

  boolean hasMessagesOfType(in nsMsgKey parent, in unsigned long viewType);
};