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/* -*- Mode: C++; 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"

interface nsIAccessible;
interface nsIArray;

[scriptable, uuid(cb0bf7b9-117e-40e2-9e46-189c3d43ce4a)]
interface nsIAccessibleTable : nsISupports
{
  /**
   * Return the caption accessible for the table. For example, html:caption
   * element of html:table element.
   */
  readonly attribute nsIAccessible caption;

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

  /**
   * Return columns count in the table.
   */
  readonly attribute long columnCount;

  /**
   * Return rows count in the table.
   */
  readonly attribute long rowCount;

  /**
   * Return 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  rowIndex     [in] the row index to retrieve the cell at
   * @param  columnIndex  [in] the column index to retrieve the cell at
   */
  nsIAccessible getCellAt(in long rowIndex, in long columnIndex);

  /**
   * Translate the given row and column indices into the corresponding cell
   * index.
   *
   * @param  rowIndex    [in] the row index to return cell index at
   * @param  columnIndex [in] the column index to return cell index at
   */
  long getCellIndexAt(in long rowIndex, in long columnIndex);

  /**
   * Translate the given cell index into the corresponding column index.
   *
   * @param  cellIndex  [in] index of the table cell to return column index for
   */
  long getColumnIndexAt(in long cellIndex);

  /**
   * Translate the given cell index into the corresponding row index.
   *
   * @param cellIndex  [in] index of the table cell to return row index for
   */
  long getRowIndexAt(in long cellIndex);

  /**
   * Translate the given cell index into the corresponding row and column
   * indices.
   *
   * @param cellIndex    [in] cell index to return row and column indices for
   * @param rowIndex     [out] row index at the given cell index
   * @param columnIndex  [out] column index at the given cell index
   */
  void getRowAndColumnIndicesAt(in long cellIndex,
                                out long rowIndex, out long columnIndex);

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

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

  /**
   * Return the description text of the specified column in the table.
   *
   * @param  columnIndex  [in] the column index to retrieve description for
   */
  AString getColumnDescription(in long columnIndex);

  /**
   * Return the description text of the specified row in the table.
   *
   * @param  rowIndex  [in] the row index to retrieve description for
   */
  AString getRowDescription(in long rowIndex);

  /**
   * Return a boolean value indicating whether the specified column is
   * selected, i.e. all cells within the column are selected.
   *
   * @param  columnIndex  [in] the column index to determine if it's selected
   */
  boolean isColumnSelected(in long columnIndex);

  /**
   * Return a boolean value indicating whether the specified row is selected,
   * i.e. all cells within the row are selected.
   *
   * @param  rowIndex  [in] the row index to determine whether it's selected
   */
  boolean isRowSelected(in long rowIndex);

  /**
   * Return a boolean value indicating whether the specified cell is selected.
   *
   * @param  rowIndex     [in] the row index of the cell
   * @param  columnIndex  [in] the column index of the cell
   */
  boolean isCellSelected(in long rowIndex, in long columnIndex);

  /**
   * Return the total number of selected cells.
   */
  readonly attribute unsigned long selectedCellCount;

  /**
   * Return the total number of selected columns.
   */
  readonly attribute unsigned long selectedColumnCount;

  /**
   * Return the total number of selected rows.
   */
  readonly attribute unsigned long selectedRowCount;

  /**
   * Return an array of selected cells.
   */
  readonly attribute nsIArray selectedCells;

  /**
   * Return an array of cell indices currently selected.
   *
   * @param  cellsArraySize  [in] length of array
   * @param  cellsArray      [in] array of indexes of selected cells
   */
  void getSelectedCellIndices(out unsigned long cellsArraySize,
                              [retval, array, size_is(cellsArraySize)] out long cellsArray);

  /**
   * Return an array of column indices currently selected.
   *
   * @param  columnsArraySize  [in] length of array
   * @param  columnsArray      [in] array of indices of selected columns
   */
  void getSelectedColumnIndices(out unsigned long columnsArraySize,
                                [retval, array, size_is(columnsArraySize)] out long columnsArray);

  /**
   * Return an array of row indices currently selected.
   *
   * @param  rowsArraySize  [in] Length of array
   * @param  rowsArray      [in] array of indices of selected rows
   */
  void getSelectedRowIndices(out unsigned long rowsArraySize,
                             [retval, array, size_is(rowsArraySize)] out long rowsArray);

  /**
   * Select a row and unselects all previously selected rows.
   *
   * @param  rowIndex  [in] the row index to select
   */
  void selectRow(in long rowIndex);

  /**
   * Select a column and unselects all previously selected columns.
   *
   * @param  columnIndex  [in] the column index to select
   */
  void selectColumn(in long columnIndex);

  /**
   * Unselect the given row, leaving other selected rows selected (if any).
   *
   * @param  rowIndex  [in] the row index to select
  */
  void unselectRow(in long rowIndex);

  /**
   * Unselect the given column, leaving other selected columns selected (if any).
   *
   * @param  columnIndex  [in] the column index to select
   */
  void unselectColumn(in long columnIndex);

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


[scriptable, uuid(654e296d-fae6-452b-987d-746b20b9514b)]
interface nsIAccessibleTableCell : nsISupports
{
  /**
   * Return host table accessible.
   */
  readonly attribute nsIAccessibleTable table;

  /**
   * Return column index of this cell.
   */
  readonly attribute long columnIndex;

  /**
   * Return row index of this cell.
   */
  readonly attribute long rowIndex;

  /**
   * Return the number of columns occupied by this cell. The result differs
   * from 1 if the specified cell spans multiple columns.
   */
  readonly attribute long columnExtent;

  /**
   * Return the number of rows occupied by this accessible cell. The result
   * differs from 1 if the specified cell spans multiple rows.
   */
  readonly attribute long rowExtent;

  /**
   * Return an array of column header cells for this cell.
   */
  readonly attribute nsIArray columnHeaderCells;

  /**
   * Return an array of row header cells for this cell.
   */
  readonly attribute nsIArray rowHeaderCells;

  /**
   * Return a boolean value indicating whether this cell is selected.
   */
  boolean isSelected();
};