GraphicSet.java

package com.jediterm.terminal.emulator.charset;

import org.jetbrains.annotations.NotNull;

/**
 * Denotes how a graphic set is designated.
 */
public class GraphicSet
{
  private final int myIndex; // 0..3
  private CharacterSet myDesignation;

  public GraphicSet( int index )
  {
    if ( index < 0 || index > 3 )
    {
      throw new IllegalArgumentException( "Invalid index!" );
    }
    myIndex = index;
    // The default mapping, based on XTerm...
    myDesignation = CharacterSet.valueOf( ( index == 1 ) ? '0' : 'B' );
  }

  /**
   * @return the designation of this graphic set.
   */
  public CharacterSet getDesignation()
  {
    return myDesignation;
  }

  /**
   * @return the index of this graphics set.
   */
  public int getIndex()
  {
    return myIndex;
  }

  /**
   * Maps a given character index to a concrete character.
   *
   * @param original
   *          the original character to map;
   * @param index
   *          the index of the character to map.
   * @return the mapped character, or the given original if no mapping could
   *         be made.
   */
  public int map( char original, int index )
  {
    int result = myDesignation.map( index );
    if ( result < 0 )
    {
      // No mapping, simply return the given original one...
      result = original;
    }
    return result;
  }

  /**
   * Sets the designation of this graphic set.
   */
  public void setDesignation(@NotNull CharacterSet designation )
  {
    myDesignation = designation;
  }
}