/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * 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 the Mozilla browser.
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications, Inc.  Portions created by Netscape are
 * Copyright (C) 1999, Mozilla.  All Rights Reserved.
 * 
 * Contributor(s):
 *   Scott MacGregor <mscott@netscape.com>
 */

/* The external helper app service is used for finding and launching
   platform specific external applications for a given mime content type.
 */

#include "nsISupports.idl"

interface nsIURI;
interface nsIStreamListener;
interface nsIFile;


[scriptable, uuid(663CC0AA-42EA-11d4-98D0-001083010E9B)]
interface nsIExternalHelperAppService : nsISupports
{
  // canHandleContent: determines if we have an external helper application for a given mime type
  // aMimeContentType --> the specified mime type we are attempting to get a helper application for
  // aUri --> the url for the data we are trying to load. The implementor may need this in order to figure 
  // out the file extension of the document.
  // returns TRUE if we have such an app and FALSE otherwise.
  boolean canHandleContent (in string aMimeContentType, in nsIURI aUri); 

  // doContent: binds an external helper application to a stream listener. The caller should pump data
  // into the returned stream listener. When the OnStopRequest is issued, the stream listener implementation
  // will launch the helper app with this data.
  // aMimeContentType --> the content type of the incoming data
  // aURI --> the URI corresponding to the incoming data
  // aWindowContext --> use GetInterface to retrieve properties like the dom window or parent window...
  //                    the service might need this in order to bring up dialogs.
  // aAbortProcess --> set to TRUE by the helper service if the caller should just forget about loading the document
  //                   (typically this occurs if the helper app just wants the URI to run and not the data)
  // returns a nsIStreamListener which the caller should pump the data into.
  nsIStreamListener doContent (in string aMimeContentType, in nsIURI aURI, 
                               in nsISupports aWindowContext, out boolean aAbortProcess); 
};

// this is a private interface shared between external app handlers and the platform specific
// external helper app service
[scriptable, uuid(491D04D5-449C-11d4-98D0-001083010E9B)]
interface nsPIExternalAppLauncher : nsISupports
{
  // launchAppWithTempFile --> used by the handler to actually launch the helper application
  // aTempFile --> the file which contains the data we want the helper app to use when it is launched
  // aAppCookie --> a cookie that was given to the app handler when it was created by the OS specific
  //                external helper app service. This cookie contains all the information the service
  //                needs to know about the application in order to launch it. It's content differs by
  //                platform.
  void launchAppWithTempFile(in nsIFile aTempFile, in nsISupports aAppCookie);
};