/*
 * Jalview - A Sequence Alignment Editor and Viewer
 * Copyright (C) 2005 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

package jalview.appletgui;

import java.util.*;

/**
 * NOTE: Columns are zero based.
 */
public class ColumnSelection
{
  Vector selected = new Vector();

  public void addElement(int col)
  {
    if(!selected.contains(new Integer(col)))
      selected.addElement(new Integer(col));
  }

  public void clear()
  {
    selected.removeAllElements();
  }

  public void removeElement(int col)
  {
    Integer colInt = new Integer(col);
    if (selected.contains(colInt))
    {
      selected.removeElement(colInt);
    }
  }

  public void removeElements(int start, int end)
  {
    Integer colInt;
    for(int i=start; i<end; i++)
    {
      colInt = new Integer(i);
      if (selected.contains(colInt))
      {
          selected.removeElement(colInt);
      }
    }
    }

  public boolean contains(int col)
  {
    return selected.contains(new Integer(col));
  }

  public int columnAt(int i)
  {
    return ( (Integer) selected.elementAt(i)).intValue();
  }

  public int size()
  {
    return selected.size();
  }

  public int getMax()
  {
    int max = -1;

    for (int i = 0; i < selected.size(); i++)
    {
      if (columnAt(i) > max)
      {
        max = columnAt(i);
      }
    }
    return max;
  }

  public int getMin()
  {
    int min = 1000000000;

    for (int i = 0; i < selected.size(); i++)
    {
      if (columnAt(i) < min)
      {
        min = columnAt(i);
      }
    }
    return min;
  }

  public Vector asVector()
  {
    return selected;
  }

  public void compensateForEdit(int start, int change)
  {
    for (int i = 0; i < size(); i++)
    {
      int temp = columnAt(i);

      if (temp >= start)
      {
        selected.setElementAt(new Integer(temp - change), i);
      }
    }
  }
}