/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 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/
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 * 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.
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 * Contributor(s):
 *   Paul Sandoz (paul.sandoz@sun.com)
 *   Bill Haneman (bill.haneman@sun.com)
 *   John Gaunt (jgaunt@netscape.com)
 *
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#include "nsISupports.idl"

interface nsIAccessible;

[scriptable, uuid(dcc1e5c3-966e-45b2-b30a-839d35432b24)]
interface nsIAccessibleTable : nsISupports
{
  /**
   * Returns the caption accessible for the table. For example, html:caption
   * element of html:table element.
   */
  readonly attribute nsIAccessible       caption;

  /**
   * Returns summary description for the table. For example, @summary attribute
   * on html:element.
   */
  readonly attribute AString             summary;

  /**
   * Returns columns count in the table.
   * XXX: not very well named property.
   */
  readonly attribute long                columns;

  /**
   * Returns table accessible containing column headers.
   */
  readonly attribute nsIAccessibleTable  columnHeader;

  /**
   * Returns rows count in the table.
   * XXX: not very well named property.
   */
  readonly attribute long                rows;

  /**
   * Returns table accessible containing row headers.
   */
  readonly attribute nsIAccessibleTable  rowHeader;

  /**
   * Returns the accessible object at the specified row and column in the table.
   * If both row and column index are valid then the corresponding accessible
   * object is returned that represents the requested cell regardless of whether
   * the cell is currently visible (on the screen).
   *
   * @param row - The row index for which to retrieve the cell.
   * @param column - The column index for which to retrieve the cell.
   */
  nsIAccessible cellRefAt(in long row, in long column);

  /**
   * Translates the given row and column indices into the corresponding cell
   * index.
   *
   * @param row - index of the row of the table for which to return the cell
   *              index.
   * @param column - index of the column of the table for which to return
   *                 the cell index.
   */
  long getIndexAt(in long row, in long column);

  /**
   * Translates the given child index into the corresponding column index.
   *
   * @param index - index of the child of the table for which to return
   *                the column index.
   */
  long getColumnAtIndex(in long index);

  /**
   * Translates the given child index into the corresponding row index.
   *
   * @param index - index of the child of the table for which to return
   *                the row index.
   */
  long getRowAtIndex(in long index);

  /**
   * Returns the number of columns occupied by the accessible object
   * at the specified row and column in the table. The result differs from 1
   * if the specified cell spans multiple columns.
   *
   * @param row - Row index of the accessible for which to return
   *              the column extent.
   * @param column - Column index of the accessible for which to return
   *                 the column extent.
   */
  long getColumnExtentAt(in long row, in long column);

  /**
   * Returns the number of rows occupied by the accessible oject
   * at the specified row and column in the table. The result differs from 1
   * if the specified cell spans multiple rows.
   *
   * @param row  - Row index of the accessible for which to return
   *               the column extent.
   * @param column - Column index of the accessible for which to return
   *                 the column extent.
   */
  long getRowExtentAt(in long row, in long column);

  /**
   * Returns the description text of the specified column in the table.
   * @param column - The index of the column for which to retrieve
   *                 the description.
   */
  AString getColumnDescription(in long column);

  /**
   * Returns the description text of the specified row in the table.
   * @param row - The index of the row for which to retrieve the description.
   */
  AString getRowDescription(in long row);

  /**
   * Returns a boolean value indicating whether the specified column is
   * completely selected.
   *
   * @param column  - Index of the column for which to determine whether it is
   *                   selected.
   */
  boolean isColumnSelected(in long column);

  /**
   * Returns a boolean value indicating whether the specified row is completely
   * selected.
   *
   * @param row - Index of the row for which to determine whether it is
   *              selected.
   */
  boolean isRowSelected(in  long row);

  /**
   * Returns a boolean value indicating whether the specified cell is selected.
   *
   * @param row - Index of the row for the cell to determine whether it is
   *              selected.
   * @param column - Index of the column for the cell to determine whether it
   *                 is selected.
   */
  boolean isCellSelected(in long row, in long column);

  /**
   * Returns the total number of selected cells.
   */
  readonly attribute unsigned long selectedCellsCount;

  /**
   * Returns the total number of selected columns.
   */
  readonly attribute unsigned long selectedColumnsCount;

  /**
   * Returns the total number of selected rows.
   */
  readonly attribute unsigned long selectedRowsCount;

  /**
   * Returns a list of cells indexes currently selected.
   *
   * @param cellsSize - length of array
   * @param cells - array of indexes of selected cells
   */
  void getSelectedCells(out unsigned long cellsSize,
                        [retval, array, size_is(cellsSize)] out long cells);

  /**
   * Returns a list of column indexes currently selected.
   *
   * @param columnsSize - Length of array
   * @param columns - Array of indexes of selected columns
   */
  void getSelectedColumns(out unsigned long columnsSize,
                          [retval, array, size_is(columnsSize)] out long columns);

  /**
   * Returns a list of row indexes currently selected.
   *
   * @param rowsSize - Length of array
   * @param rows - Array of indexes of selected rows
   */
  void getSelectedRows(out unsigned long rowsSize,
                       [retval, array, size_is(rowsSize)] out long rows);

  /**
   * Selects a row and unselects all previously selected rows.
   *
   * @param row - Index of the row to be selected.
   */
  void selectRow(in long row);

  /**
   * Selects a column and unselects all previously selected columns.
   *
   * @param column - Index of the column to be selected.
   */
  void selectColumn(in long column);

  /**
   * Unselects one row, leaving other selected rows selected (if any).
   *
   * @param row  - Index of the row to be selected.
  */
  void unselectRow(in long row);

  /**
   * Unselects one column, leaving other selected columns selected (if any).
   *
   * @param column - Index of the column to be selected.
   */
  void unselectColumn(in long column);

  /**
   * Use heuristics to determine if table is most likely used for layout.
   */
  boolean isProbablyForLayout();
};

