ColorPalette.java

package com.jediterm.terminal.emulator;

import com.jediterm.terminal.TerminalColor;

import java.awt.*;

/**
 * @author traff
 */
@SuppressWarnings("UseJBColor")
public abstract class ColorPalette {
  public static final ColorPalette XTERM_PALETTE = new ColorPalette() {
    @Override
    public Color[] getIndexColors() {
      return new Color[]{
          new Color(0x000000), //Black
          new Color(0xcd0000), //Red 
          new Color(0x00cd00), //Green
          new Color(0xcdcd00), //Yellow
          new Color(0x1e90ff), //Blue 
          new Color(0xcd00cd), //Magenta
          new Color(0x00cdcd), //Cyan
          new Color(0xe5e5e5), //White
          //Bright versions of the ISO colors
          new Color(0x4c4c4c), //Black 
          new Color(0xff0000), //Red
          new Color(0x00ff00), //Green
          new Color(0xffff00), //Yellow
          new Color(0x4682b4), //Blue
          new Color(0xff00ff), //Magenta
          new Color(0x00ffff), //Cyan
          new Color(0xffffff), //White
      };
    }
  };

  public static final ColorPalette WINDOWS_PALETTE = new ColorPalette() {
    @Override
    public Color[] getIndexColors() {
      return new Color[]{
          new Color(0x000000), //Black
          new Color(0x800000), //Red 
          new Color(0x008000), //Green
          new Color(0x808000), //Yellow
          new Color(0x000080), //Blue 
          new Color(0x800080), //Magenta
          new Color(0x008080), //Cyan
          new Color(0xc0c0c0), //White
          //Bright versions of the ISO colors
          new Color(0x808080), //Black 
          new Color(0xff0000), //Red
          new Color(0x00ff00), //Green
          new Color(0xffff00), //Yellow
          new Color(0x4682b4), //Blue
          new Color(0xff00ff), //Magenta
          new Color(0x00ffff), //Cyan
          new Color(0xffffff), //White
      };
    }
  };

  public abstract Color[] getIndexColors();

  public Color getColor(TerminalColor color) {
    if (color.isIndexed()) {
      return getIndexColors()[color.getIndex()];
    } else {
      return color.toAwtColor();
    }
  }

  public static TerminalColor getIndexedColor(int index) {
    return (index < 16) ? TerminalColor.index(index) : getXTerm256(index);
  }

  private static TerminalColor getXTerm256(int index) {
    return index < 256 ? COL_RES_256[index - 16] : null;
  }

  //The code below is translation of xterm's 256colres.pl

  // colors 16-231 are a 6x6x6 color cube
  private static final TerminalColor[] COL_RES_256 = new TerminalColor[240];

  static {
    for (int red = 0; red < 6; ++red) {
      for (int green = 0; green < 6; ++green) {
        for (int blue = 0; blue < 6; ++blue) {
          int code = 36 * red + 6 * green + blue;
          COL_RES_256[code] =
              new TerminalColor(red > 0 ? (40 * red + 55) : 0,
                  green > 0 ? (40 * green + 55) : 0,
                  blue > 0 ? (40 * blue + 55) : 0);
        }
      }
    }

    // colors 232-255 are a grayscale ramp, intentionally leaving out
    // black and white
    for (int gray = 0; gray < 24; ++gray) {
      int level = 10 * gray + 8;
      COL_RES_256[216 + gray] = new TerminalColor(level, level, level);
    }
  }

}