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/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"
#include "nsIBaseWindow.idl"

typedef long nsTaskbarProgressState;

/**
 * Starting in Windows 7, applications can display a progress notification in
 * the taskbar. This class wraps around the native functionality to do this.
 */
[scriptable, uuid(23ac257d-ef3c-4033-b424-be7fef91a86c)]
interface nsITaskbarProgress : nsISupports
{
  /**
   * Stop displaying progress on the taskbar button. This should be used when
   * the operation is complete or cancelled.
   */
  const nsTaskbarProgressState STATE_NO_PROGRESS   = 0;

  /**
   * Display a cycling, indeterminate progress bar.
   */
  const nsTaskbarProgressState STATE_INDETERMINATE = 1;

  /**
   * Display a determinate, normal progress bar.
   */
  const nsTaskbarProgressState STATE_NORMAL        = 2;

  /**
   * Display a determinate, error progress bar.
   */
  const nsTaskbarProgressState STATE_ERROR         = 3;

  /**
   * Display a determinate progress bar indicating that the operation has
   * paused.
   */
  const nsTaskbarProgressState STATE_PAUSED        = 4;

  /**
   * Sets the taskbar progress state and value for this window. The currentValue
   * and maxValue parameters are optional and should be supplied when |state|
   * is one of STATE_NORMAL, STATE_ERROR or STATE_PAUSED.
   *
   * @throws NS_ERROR_INVALID_ARG if state is STATE_NO_PROGRESS or
   *         STATE_INDETERMINATE, and either currentValue or maxValue is not 0.
   * @throws NS_ERROR_ILLEGAL_VALUE if currentValue is greater than maxValue.
   */
  void setProgressState(in nsTaskbarProgressState state,
                        [optional] in unsigned long long currentValue,
                        [optional] in unsigned long long maxValue);
};