/* -*- Mode: IDL; tab-width: 4; 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 the Mozilla browser.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications, Inc.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Mark Pilgrim <pilgrim@gmail.com>
 *
 * 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 "nsISupports.idl"
#include "nsIURI.idl"
interface nsIChannel;

[scriptable, uuid(cb0ad623-6b46-4c09-a473-c1d6ca63d3c7)]
interface nsIRefreshURI : nsISupports {
    /**
      * Load a uri after waiting for aMillis milliseconds. If the docshell
      * is busy loading a page currently, the refresh request will be
      * queued and executed when the current load finishes. 
      *
      * @param aUri The uri to refresh.
      * @param aMillis The number of milliseconds to wait.
      * @param aRepeat Flag to indicate if the uri is to be 
      *                repeatedly refreshed every aMillis milliseconds.
      * @param aMetaRefresh Flag to indicate if this is a Meta refresh.
      */
    void refreshURI(in nsIURI aURI, in long aMillis, in boolean aRepeat,
                    in boolean aMetaRefresh);

    /**
      * Loads a URI immediately as if it were a refresh.
      *
      * @param aURI The URI to refresh.
      * @param aMillis The number of milliseconds by which this refresh would
      *                be delayed if it were not being forced.
      * @param aMetaRefresh Flag to indicate if this is a meta refresh.
      */
    void forceRefreshURI(in nsIURI aURI, in long aMillis, in boolean aMetaRefresh);

    /**
      * Checks the passed in channel to see if there is a refresh header, 
      * if there is, will setup a timer to refresh the uri found
      * in the header. If docshell is busy loading a page currently, the
      * request will be queued and executed when the current page 
      * finishes loading. 
      *
      * Returns the NS_REFRESHURI_HEADER_FOUND success code if a refresh
      * header was found and successfully setup.
      *
      * @param aChannel The channel to be parsed. 
      */
    void setupRefreshURI(in nsIChannel aChannel); 

    /**
      * Parses the passed in header string and sets up a refreshURI if
      * a "refresh" header is found. If docshell is busy loading a page 
      * currently, the request will be queued and executed when 
      * the current page finishes loading. 
      *
      * @param aBaseURI base URI to resolve refresh uri with.
      * @param aHeader  The meta refresh header string.
      */
    void setupRefreshURIFromHeader(in nsIURI aBaseURI, in ACString aHeader);
      
    /**
      * Cancels all timer loads.
      */
    void cancelRefreshURITimers();

   /**
     * True when there are pending refreshes, false otherwise.
     */
   readonly attribute boolean refreshPending;
};


/**
 * This success code indicates that a refresh header was found and
 * successfully setup.
 */
%{C++
#define NS_REFRESHURI_HEADER_FOUND \
     NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_URILOADER, \
                               2)
%}