/* -*- Mode: C++; tab-width: 2; 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"
interface nsIChannel;

[scriptable, uuid(2F0F927A-8677-11d3-989D-001083010E9B)]
interface nsIContentHandler : nsISupports
{
  /* CanHandleContent returns true if this content handler wants
     to handle this particular content type and false otherwise.
     aContentType --> is the content type of the document
     aCommand --> is a layout specific action command i.e. "view"
     aWindowTarget --> can be null for the normal case. It refers to the
                       target window name the content needs to be displayed in.
  */
  void CanHandleContent(in string aContentType,
                        in string aCommand, 
                        in string aWindowTarget, 
                        out boolean aCanHandle);

  /* HandleContent works as the name implies =). aChannel is an open channel
     whose content type is already known (aContentType) */
  void HandleContent(in string aContentType,
                     in string aCommand,
                     in string aWindowTarget,
                     in nsIChannel aChannel);
  
  attribute nsIContentHandler parentHandler; 
};
