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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef TABLE_ACCESSIBLE_H
#define TABLE_ACCESSIBLE_H
#include "TableCellAccessible.h"
#include "nsPointerHashKeys.h"
#include "nsRefPtrHashtable.h"
#include "nsString.h"
#include "nsTArray.h"
namespace mozilla {
namespace a11y {
class Accessible;
/**
* Accessible table interface.
*/
class TableAccessible {
public:
/**
* Return the caption accessible if any for this table.
*/
virtual Accessible* Caption() const { return nullptr; }
/**
* Get the summary for this table.
*/
virtual void Summary(nsString& aSummary) { aSummary.Truncate(); }
/**
* Return the number of columns in the table.
*/
virtual uint32_t ColCount() const { return 0; }
/**
* Return the number of rows in the table.
*/
virtual uint32_t RowCount() { return 0; }
/**
* Return the accessible for the cell at the given row and column indices.
*/
virtual Accessible* CellAt(uint32_t aRowIdx, uint32_t aColIdx) {
return nullptr;
}
/**
* Return the index of the cell at the given row and column.
*/
virtual int32_t CellIndexAt(uint32_t aRowIdx, uint32_t aColIdx) {
return ColCount() * aRowIdx + aColIdx;
}
/**
* Return the column index of the cell with the given index.
* This returns -1 if the column count is 0 or an invalid index is being
* passed in.
*/
virtual int32_t ColIndexAt(uint32_t aCellIdx);
/**
* Return the row index of the cell with the given index.
* This returns -1 if the column count is 0 or an invalid index is being
* passed in.
*/
virtual int32_t RowIndexAt(uint32_t aCellIdx);
/**
* Get the row and column indices for the cell at the given index.
* This returns -1 for both output parameters if the column count is 0 or an
* invalid index is being passed in.
*/
virtual void RowAndColIndicesAt(uint32_t aCellIdx, int32_t* aRowIdx,
int32_t* aColIdx);
/**
* Return the number of columns occupied by the cell at the given row and
* column indices.
*/
virtual uint32_t ColExtentAt(uint32_t aRowIdx, uint32_t aColIdx) { return 1; }
/**
* Return the number of rows occupied by the cell at the given row and column
* indices.
*/
virtual uint32_t RowExtentAt(uint32_t aRowIdx, uint32_t aColIdx) { return 1; }
/**
* Get the description of the given column.
*/
virtual void ColDescription(uint32_t aColIdx, nsString& aDescription) {
aDescription.Truncate();
}
/**
* Get the description for the given row.
*/
virtual void RowDescription(uint32_t aRowIdx, nsString& aDescription) {
aDescription.Truncate();
}
/**
* Return true if the given column is selected.
*/
virtual bool IsColSelected(uint32_t aColIdx) { return false; }
/**
* Return true if the given row is selected.
*/
virtual bool IsRowSelected(uint32_t aRowIdx) { return false; }
/**
* Return true if the given cell is selected.
*/
virtual bool IsCellSelected(uint32_t aRowIdx, uint32_t aColIdx) {
return false;
}
/**
* Return the number of selected cells.
*/
virtual uint32_t SelectedCellCount() { return 0; }
/**
* Return the number of selected columns.
*/
virtual uint32_t SelectedColCount() { return 0; }
/**
* Return the number of selected rows.
*/
virtual uint32_t SelectedRowCount() { return 0; }
/**
* Get the set of selected cells.
*/
virtual void SelectedCells(nsTArray<Accessible*>* aCells) = 0;
/**
* Get the set of selected cell indices.
*/
virtual void SelectedCellIndices(nsTArray<uint32_t>* aCells) = 0;
/**
* Get the set of selected column indices.
*/
virtual void SelectedColIndices(nsTArray<uint32_t>* aCols) = 0;
/**
* Get the set of selected row indices.
*/
virtual void SelectedRowIndices(nsTArray<uint32_t>* aRows) = 0;
/**
* Select the given column unselecting any other selected columns.
*/
virtual void SelectCol(uint32_t aColIdx) {}
/**
* Select the given row unselecting all other previously selected rows.
*/
virtual void SelectRow(uint32_t aRowIdx) {}
/**
* Unselect the given column leaving other selected columns selected.
*/
virtual void UnselectCol(uint32_t aColIdx) {}
/**
* Unselect the given row leaving other selected rows selected.
*/
virtual void UnselectRow(uint32_t aRowIdx) {}
/**
* Return true if the table is probably for layout.
*/
virtual bool IsProbablyLayoutTable();
/**
* Convert the table to an Accessible*.
*/
virtual Accessible* AsAccessible() = 0;
typedef nsRefPtrHashtable<nsPtrHashKey<const TableCellAccessible>, Accessible>
HeaderCache;
/**
* Get the header cache, which maps a TableCellAccessible to its previous
* header.
* Although this data is only used in TableCellAccessible, it is stored on
* TableAccessible so the cache can be easily invalidated when the table
* is mutated.
*/
HeaderCache& GetHeaderCache() { return mHeaderCache; }
protected:
/**
* Return row accessible at the given row index.
*/
Accessible* RowAt(int32_t aRow);
/**
* Return cell accessible at the given column index in the row.
*/
Accessible* CellInRowAt(Accessible* aRow, int32_t aColumn);
private:
HeaderCache mHeaderCache;
};
} // namespace a11y
} // namespace mozilla
#endif
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