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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
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 * Software distributed under the License is distributed on an "AS IS" basis,
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 * 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
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 * Contributor(s):
 *   Louie Zhao <Louie.Zhao@sun.com> (original author)
 *   Alexander Surkov <surkov.alexander@gmail.com>
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
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#include "nsISupports.idl"
#include "nsITreeColumns.idl"

interface nsIAccessible;

 * A private interface to operate with tree accessible.
 * @status UNDER_REVIEW
00051 interface nsIAccessibleTreeCache : nsISupports
   * Get tree item from cache according to row and column, create if doesn't
   * exist in cache.
   * @param aRow     the given row index
   * @param aColumn  the given column object. If is is nsnull then primary
   *                 column is used. It makes sense for ATK only.
  nsIAccessible getCachedTreeitemAccessible(in long aRow,
                                            in nsITreeColumn aColumn);

   * Invalidates the number of cached treeitem accessibles.
   * @param aRow    row index the invalidation starts from
   * @param aCount  the number of treeitem accessibles to invalidate,
   *                the number sign specifies whether rows have been
   *                inserted (plus) or removed (minus)
  void invalidateCache(in long aRow, in long aCount);

   * Fires name change events for invalidated area of tree.
   * @param aStartRow  row index invalidation starts from
   * @param aEndRow    row index invalidation ends, -1 means last row index
   * @param aStartCol  column index invalidation starts from
   * @param aEndCol    column index invalidation ends, -1 mens last column
   *                   index
  void treeViewInvalidated(in long aStartRow, in long aEndRow,
                           in long aStartCol, in long aEndCol);

interface nsPIAccessibleTreeItem : nsISupports
   * Get/set cached name.
  attribute AString cachedName;

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