gecko-dev/layout/tables/nsCellMap.h
1998-04-14 21:45:28 +00:00

80 lines
2.5 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsCellMap_h__
#define nsCellMap_h__
#include "nscore.h"
class CellData;
/** nsCellMap is a support class for nsTablePart.
* It maintains an Rows x Columns grid onto which the cells of the table are mapped.
* This makes processing of rowspan and colspan attributes much easier.
* Each cell is represented by a CellData object.
*
* @see CellData
* @see nsTablePart::BuildCellMap
* @see nsTablePart::GrowCellMap
* @see nsTablePart::BuildCellIntoMap
*
* acts like a 2-dimensional array, so all offsets are 0-indexed
TODO: inline methods
*/
class nsCellMap
{
protected:
/** storage for CellData pointers */
PRInt32 *mCells;
/** the number of rows */
int mRowCount; // in java, we could just do fCellMap.length;
/** the number of columns (the max of all row lengths) */
int mColCount; // in java, we could just do fCellMap[i].length
public:
nsCellMap(int aRows, int aColumns);
// NOT VIRTUAL BECAUSE THIS CLASS SHOULD **NEVER** BE SUBCLASSED
~nsCellMap();
/** initialize the CellMap to (aRows x aColumns) */
void Reset(int aRows, int aColumns);
/** return the CellData for the cell at (aRow,aColumn) */
CellData * GetCellAt(int aRow, int aColumn) const;
/** assign aCellData to the cell at (aRow,aColumn) */
void SetCellAt(CellData *aCellData, int aRow, int aColumn);
/** expand the CellMap to have aColCount columns. The number of rows remains the same */
void GrowTo(int aColCount);
/** return the total number of columns in the table represented by this CellMap */
int GetColCount() const;
/** return the total number of rows in the table represented by this CellMap */
int GetRowCount() const;
/** for debugging, print out this CellMap */
void DumpCellMap() const;
};
#endif