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/* ***** 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
 *   Nick Kreeger <nick.kreeger@park.edu>
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * 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"
interface nsIUrlListener;
interface nsIMsgWindow;
interface nsIWebProgressListener;

[scriptable, uuid(D1B43428-B631-4629-B691-AB0E01A2DB4B)]
interface nsIMsgShutdownTask : nsISupports
{
  /**
   * Inform the caller wheter or not the task needs to be run. This method
   * gives the task the flexibility to cancel running a task on shutdown
   * if nothing needs to be run.
   */
  readonly attribute boolean needsToRunTask;

  /**
   * At shutdown-time, this function will be called to all registered implementors.
   * Shutdown will be temporarily postponed until |OnStopRequest()| has been called
   * on the passed in url-listener. 
   * @param inUrlListener The URL listener to report events to.
   * @param inMsgWindow The current message window to allow for posing dialogs.
   * @return If the shutdown URL was run or not. If the URL is running, the task
   *         will be responsible for notifying |inUrlListener| when the task is completed.
   */
  boolean doShutdownTask(in nsIUrlListener inUrlListener, in nsIMsgWindow inMsgWindow);
  
  /**
   * Get the displayable name of the current task. This textual information will be
   * shown to the user so they know what shutdown task is being performed.
   * @return The name of the current task being performed.
   */
  AString getCurrentTaskName();
};

[scriptable, uuid(483C8ABB-ECF9-48A3-A394-2C604B603BD5)]
interface nsIMsgShutdownService : nsISupports
{
  /**
   * Get the number of tasks that will need to be processed at shutdown time.
   * @return The number of shutdown tasks to do.
   */ 
  long getNumTasks();
  
  /**
   * Start the shutdown tasks. 
   */
  void startShutdownTasks();
  
  /**
   * Tell the service to stop running tasks and go ahead and shutdown the application.
   */
  void cancelShutdownTasks();
  
  /**
   * Set the shutdown listener.
   */
  void setShutdownListener(in nsIWebProgressListener inListener);
  
  /**
   * Set the status text of the shutdown progress dialog.
   */
  void setStatusText(in AString inStatusString);
};