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/* -*- 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):
 *   Chris Saari <saari@netscape.com>
 *   Dan Rosen <dr@netscape.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either 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 ***** */

interface nsIDOMWindow;
interface nsIDOMElement;

#include "nsISupports.idl"

/**
 * nsIWebBrowserFocus
 * Interface that embedders use for controlling and interacting
 * with the browser focus management. The embedded browser can be focused by
 * clicking in it or tabbing into it. If the browser is currently focused and
 * the embedding application's top level window is disabled, deactivate() must
 * be called, and activate() called again when the top level window is
 * reactivated for the browser's focus memory to work correctly.
 */

[scriptable, uuid(9c5d3c58-1dd1-11b2-a1c9-f3699284657a)]
interface nsIWebBrowserFocus : nsISupports
{
  /**
   * MANDATORY
   * activate() is a mandatory call that must be made to the browser
   * when the embedding application's window is activated *and* the 
   * browser area was the last thing in focus.  This method can also be called
   * if the embedding application wishes to give the browser area focus,
   * without affecting the currently focused element within the browser.
   *
   * @note
   * If you fail to make this call, mozilla focus memory will not work
   * correctly.
   */
  void activate();

  /**
   * MANDATORY
   * deactivate() is a mandatory call that must be made to the browser
   * when the embedding application's window is deactivated *and* the
   * browser area was the last thing in focus.  On non-windows platforms,
   * deactivate() should also be called when focus moves from the browser
   * to the embedding chrome.
   *
   * @note
   * If you fail to make this call, mozilla focus memory will not work
   * correctly.
   */
  void deactivate();

  /**
   * Give the first element focus within mozilla
   * (i.e. TAB was pressed and focus should enter mozilla)
   */
  void setFocusAtFirstElement();

  /**
   * Give the last element focus within mozilla
   * (i.e. SHIFT-TAB was pressed and focus should enter mozilla)
   */
  void setFocusAtLastElement();
  
  /**
   * The currently focused nsDOMWindow when the browser is active,
   * or the last focused nsDOMWindow when the browser is inactive.
   */
  attribute nsIDOMWindow focusedWindow;
  
  /**
   * The currently focused nsDOMElement when the browser is active,
   * or the last focused nsDOMElement when the browser is inactive.
   */
  attribute nsIDOMElement focusedElement;
};