/* -*- Mode: C++; tab-width: 2; 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 Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * 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"
#include "nsIAccessibleRetrieval.idl"

interface nsIAccessibleEventListener;
interface nsIDocument;
interface nsIFrame;
interface nsObjectFrame;
interface nsIContent;
interface nsITimer;

[uuid(29384ba1-f9ce-425d-afb5-54e2ee949d87)]
interface nsIAccessibilityService : nsIAccessibleRetrieval
{
  nsIAccessible createOuterDocAccessible(in nsIDOMNode aNode);
  nsIAccessible createRootAccessible(in nsIPresShell aShell, in nsIDocument aDocument);

  nsIAccessible createHTML4ButtonAccessible(in nsIFrame aFrame);
  nsIAccessible createHyperTextAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLBRAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLButtonAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLAccessibleByMarkup(in nsIFrame aFrame, in nsIWeakReference aWeakShell, in nsIDOMNode aDOMNode);
  nsIAccessible createHTMLLIAccessible(in nsIFrame aFrame, in nsIFrame aBulletFrame, in AString aBulletText);
  nsIAccessible createHTMLCheckboxAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLComboboxAccessible(in nsIDOMNode aNode, in nsIWeakReference aPresShell);
  nsIAccessible createHTMLGenericAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLGroupboxAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLHRAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLImageAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLLabelAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLListboxAccessible(in nsIDOMNode aNode, in nsIWeakReference aPresShell);
  nsIAccessible createHTMLMediaAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLObjectFrameAccessible(in nsObjectFrame aFrame);
  nsIAccessible createHTMLRadioButtonAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLSelectOptionAccessible(in nsIDOMNode aNode, in nsIAccessible aAccParent, in nsIWeakReference aPresShell);
  nsIAccessible createHTMLTableAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLTableCellAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLTextAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLTextFieldAccessible(in nsIFrame aFrame);
  nsIAccessible createHTMLCaptionAccessible(in nsIFrame aFrame);

  nsIAccessible getAccessible(in nsIDOMNode aNode, in nsIPresShell aPresShell,                          
                              in nsIWeakReference aWeakShell, 
                              inout nsIFrame frameHint, out boolean aIsHidden);

  // For gtk+ native window accessible
  nsIAccessible addNativeRootAccessible(in voidPtr aAtkAccessible);
  void removeNativeRootAccessible(in nsIAccessible aRootAccessible);

  /**
   * Used to describe sort of changes leading to accessible tree invalidation.
   */
  const unsigned long NODE_APPEND = 0x01;
  const unsigned long NODE_REMOVE = 0x02;
  const unsigned long NODE_SIGNIFICANT_CHANGE = 0x03;
  const unsigned long FRAME_SHOW = 0x04;
  const unsigned long FRAME_HIDE = 0x05;
  const unsigned long FRAME_SIGNIFICANT_CHANGE = 0x06;

  /**
   * Invalidate the accessible tree when DOM tree or frame tree is changed.
   *
   * @param aPresShell   [in] the presShell where changes occured
   * @param aContent     [in] the affected DOM content
   * @param aChangeType  [in] the change type (see constants declared above)
   */
  void invalidateSubtreeFor(in nsIPresShell aPresShell, in nsIContent aContent,
                            in PRUint32 aChangeType);

  /**
   *  An internal doc load event has occured. Handle the event and remove it from the list.
   *  @param aTimer      The timer created to handle this doc load event
   *  @param aClosure    The nsIWebProgress* for the load event
   *  @param aEventType  The type of load event, one of: nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_START,
   *                                                     nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_COMPLETE or
   *                                                     nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_STOPPED
   */
  void processDocLoadEvent(in nsITimer aTimer, in voidPtr aClosure, in PRUint32 aEventType);

  /**
   * Notify accessibility that anchor jump has been accomplished to the given
   * target. Used by layout.
   */
  void notifyOfAnchorJumpTo(in nsIContent aTarget);

  /**
   * Fire accessible event of the given type for the given target.
   *
   * @param aEvent   [in] accessible event type
   * @param aTarget  [in] target of accessible event
   */
  void fireAccessibleEvent(in unsigned long aEvent, in nsIAccessible aTarget);
};


%{ C++

// for component registration
// {DE401C37-9A7F-4278-A6F8-3DE2833989EF}
#define NS_ACCESSIBILITY_SERVICE_CID \
{ 0xde401c37, 0x9a7f, 0x4278, { 0xa6, 0xf8, 0x3d, 0xe2, 0x83, 0x39, 0x89, 0xef } }

extern nsresult
NS_GetAccessibilityService(nsIAccessibilityService** aResult);

%}
