/*********************************************************************
*
*      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.read.biff;

import jxl.common.Logger;

import jxl.biff.IntegerHelper;
import jxl.biff.RecordData;

/**
 * Contains an array of Blank, formatted cells
 */
class MulBlankRecord extends RecordData
{
  /**
   * The logger
   */
  private static Logger logger = Logger.getLogger(MulBlankRecord.class);

  /**
   * The row  containing these numbers
   */
  private int row;
  /**
   * The first column these rk number occur on
   */
  private int colFirst;
  /**
   * The last column these blank numbers occur on
   */
  private int colLast;
  /**
   * The number of blank numbers contained in this record
   */
  private int numblanks;
  /**
   * The array of xf indices
   */
  private int[] xfIndices;

  /**
   * Constructs the blank records from the raw data
   *
   * @param t the raw data
   */
  public MulBlankRecord(Record t)
  {
    super(t);
    byte[] data = getRecord().getData();
    int length = getRecord().getLength();
    row = IntegerHelper.getInt(data[0], data[1]);
    colFirst = IntegerHelper.getInt(data[2], data[3]);
    colLast = IntegerHelper.getInt(data[length - 2], data[length - 1]);
    numblanks = colLast - colFirst + 1;
    xfIndices = new int[numblanks];

    readBlanks(data);
  }

  /**
   * Reads the blanks from the raw data
   *
   * @param data the raw data
   */
  private void readBlanks(byte[] data)
  {
    int pos = 4;
    for (int i = 0; i < numblanks; i++)
    {
      xfIndices[i] = IntegerHelper.getInt(data[pos], data[pos + 1]);
      pos += 2;
    }
  }

  /**
   * Accessor for the row
   *
   * @return the row of containing these blank numbers
   */
  public int getRow()
  {
    return row;
  }

  /**
   * The first column containing the blank numbers
   *
   * @return the first column
   */
  public int getFirstColumn()
  {
    return colFirst;
  }

  /**
   * Accessor for the number of blank values
   *
   * @return the number of blank values
   */
  public int getNumberOfColumns()
  {
    return numblanks;
  }

  /**
   * Return a specific formatting index
   * @param index the cell index in the group
   * @return the formatting index
   */
  public int getXFIndex(int index)
  {
    return xfIndices[index];
  }
}