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/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla 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/MPL/
 *
 * 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
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Jeff Walden <jwalden+code@mit.edu> (original author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsIDOMEvent.idl"

/**
 * The nsIDOMMessageEvent interface is used for server-sent events and for
 * cross-domain messaging.
 *
 * For more information on this interface, please see
 * http://www.whatwg.org/specs/web-apps/current-work/#messageevent
 */
[scriptable, uuid(3aca4a44-8e5f-4829-9d59-ce4adbba2b12)]
interface nsIDOMMessageEvent : nsIDOMEvent
{
  /**
   * Custom string data associated with this event.
   */
  [implicit_jscontext]
  readonly attribute jsval data;
  
  /**
   * The origin of the site from which this event originated, which is the
   * scheme, ":", and if the URI has a host, "//" followed by the
   * host, and if the port is not the default for the given scheme,
   * ":" followed by that port.  This value does not have a trailing slash.
   */
  readonly attribute DOMString origin;

  /**
   * The last event ID string of the event source, for server-sent DOM events; this
   * value is the empty string for cross-origin messaging.
   */
  readonly attribute DOMString lastEventId;
  
  /**
   * The window which originated this event.
   */
  readonly attribute nsIDOMWindow source;

  /**
   * Initializes this event with the given data, in a manner analogous to
   * the similarly-named method on the nsIDOMEvent interface, also setting the
   * data, origin, source, and lastEventId attributes of this appropriately.
   */
  void initMessageEvent(in DOMString aType,
                        in boolean aCanBubble,
                        in boolean aCancelable,
                        in jsval aData,
                        in DOMString aOrigin,
                        in DOMString aLastEventId,
                        in nsIDOMWindow aSource);
};