/*********************************************************************
*
*      Copyright (C) 2002 Andrew Khan
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
***************************************************************************/

package jxl.write.biff;

import java.util.ArrayList;

import jxl.Cell;
import jxl.Range;
import jxl.biff.IntegerHelper;
import jxl.biff.Type;
import jxl.biff.WritableRecordData;

/**
 * A number record.  This is stored as 8 bytes, as opposed to the 
 * 4 byte RK record
 */
public class MergedCellsRecord extends WritableRecordData
{
  /**
   * The ranges of all the cells which are merged on this sheet
   */
  private ArrayList ranges;

  /**
   * Constructs a merged cell record
   *
   * @param ws the sheet containing the merged cells
   */
  protected MergedCellsRecord(ArrayList mc)
  {
    super(Type.MERGEDCELLS);

    ranges = mc;
  }

  /**
   * Gets the raw data for output to file
   * 
   * @return the data to write to file
   */
  public byte[] getData()
  {
    byte[] data = new byte[ranges.size() * 8 + 2];

    // Set the number of ranges
    IntegerHelper.getTwoBytes(ranges.size(), data, 0);

    int pos = 2;
    Range range = null;
    for (int i = 0; i < ranges.size() ; i++)
    {
      range = (Range) ranges.get(i);

      // Set the various cell records
      Cell tl = range.getTopLeft();
      Cell br = range.getBottomRight();
      
      IntegerHelper.getTwoBytes(tl.getRow(), data, pos);
      IntegerHelper.getTwoBytes(br.getRow(), data, pos+2);
      IntegerHelper.getTwoBytes(tl.getColumn(), data, pos+4);
      IntegerHelper.getTwoBytes(br.getColumn(), data, pos+6);

      pos += 8;
    }

    return data;
  }

}