dmolony-DiskBrowser/src/com/bytezone/diskbrowser/visicalc/Address.java

package com.bytezone.diskbrowser.visicalc;

class Address implements Comparable<Address>
{
  int row, column;
  int sortValue;
  String text;

  public Address (String column, String row)
  {
    set (column, row);
  }

  public Address (int column, int row)
  {
    assert column <= 64;
    assert row <= 255;
    this.row = row;
    this.column = column;
    sortValue = row * 64 + column;

    int col1 = column / 26;
    int col2 = column % 26;
    String col =
        col1 > 0 ? (char) ('@' + col1) + ('A' + col2) + "" : (char) ('A' + col2) + "";
    text = col + (row + 1);
  }

  public Address (String address)
  {
    if (address.charAt (1) < 'A')
      set (address.substring (0, 1), address.substring (1));
    else
      set (address.substring (0, 2), address.substring (2));
  }

  private void set (String sCol, String sRow)
  {
    //      System.out.printf ("Set: %s, %s%n", sCol, sRow);
    if (sCol.length () == 1)
      column = sCol.charAt (0) - 'A';
    else if (sCol.length () == 2)
      column = (sCol.charAt (0) - '@') * 26 + sCol.charAt (1) - 'A';
    else
      System.out.println ("Bollocks");

    try
    {
      row = Integer.parseInt (sRow) - 1;
      sortValue = row * 64 + column;
      text = sCol + sRow;
    }
    catch (NumberFormatException e)
    {
      System.out.printf ("NFE: %s%n", sRow);
    }
  }

  public Address nextRow ()
  {
    Address next = new Address (column, row + 1);
    return next;
  }

  public Address nextColumn ()
  {
    Address next = new Address (column + 1, row);
    return next;
  }

  @Override
  public String toString ()
  {
    return String.format ("%s %d %d %d", text, row, column, sortValue);
  }

  @Override
  public int compareTo (Address o)
  {
    return sortValue - o.sortValue;
  }
}