colorizer.java

java telnet 服务器实现 .

//License
/***
 * Java TelnetD library (embeddable telnet daemon)
 * Copyright (c) 2000-2005 Dieter Wimberger 
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the author nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *  
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS
 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 ***/

package net.wimpi.telnetd.io.terminal;

/**
 * Singleton utility class for translating
 * internal color/style markup into ANSI defined
 * escape sequences. It uses a very simple but effective
 * lookup table, and does the job without sophisticated
 * parsing routines. It should therefore perform quite
 * fast.
 *
 * @author Dieter Wimberger
 * @version 2.0 (16/07/2006)
 */
public final class Colorizer {

  private static Object c_Self;		//Singleton instance reference
  private int[] m_ColorMapping;		//translation table

  /**
   * Constructs a Colorizer with its translation table.
   */
  private Colorizer() {

    m_ColorMapping = new int[128];

    m_ColorMapping[83] = S;
    m_ColorMapping[82] = R;
    m_ColorMapping[71] = G;
    m_ColorMapping[89] = Y;
    m_ColorMapping[66] = B;
    m_ColorMapping[77] = M;
    m_ColorMapping[67] = C;
    m_ColorMapping[87] = W;

    m_ColorMapping[115] = s;
    m_ColorMapping[114] = r;
    m_ColorMapping[103] = g;
    m_ColorMapping[121] = y;
    m_ColorMapping[98] = b;
    m_ColorMapping[109] = m;
    m_ColorMapping[99] = c;
    m_ColorMapping[119] = w;

    m_ColorMapping[102] = f;
    m_ColorMapping[100] = d;
    m_ColorMapping[105] = i;
    m_ColorMapping[106] = j;
    m_ColorMapping[117] = u;
    m_ColorMapping[118] = v;
    m_ColorMapping[101] = e;
    m_ColorMapping[110] = n;
    m_ColorMapping[104] = h;
    m_ColorMapping[97] = a;

    c_Self = this;
  }//constructor

  /**
   * Translates all internal markups within the String
   * into ANSI Escape sequences.<br>
   * The method is hooked into BasicTerminalIO.write(String str), so
   * it is not necessary to call it directly.
   *
   * @param str     String with internal color/style markups.
   * @param support boolean that represents Terminals ability to support GR sequences.
   *                if false, the internal markups are ripped out of the string.
   * @return String with ANSI escape sequences (Graphics Rendition), if support is true,
   *         String without internal markups or ANSI escape sequences if support is false.
   */
  public String colorize(String str, boolean support) {
    return colorize(str, support, false);
  }//colorize

  /**
   * Translates all internal markups within the String
   * into ANSI Escape sequences.<br>
   * The method is hooked into BasicTerminalIO.write(String str), so
   * it is not necessary to call it directly.
   *
   * @param str       String with internal color/style markups.
   * @param support   boolean that represents Terminals ability to support GR sequences.
   *                  if false, the internal markups are ripped out of the string.
   * @param forcebold boolean that forces the output to be bold at any time.
   * @return String with ANSI escape sequences (Graphics Rendition), if support is true,
   *         String without internal markups or ANSI escape sequences if support is false.
   */
  public String colorize(String str, boolean support, boolean forcebold) {

    StringBuffer out = new StringBuffer(str.length() + 20);
    int parsecursor = 0;
    int foundcursor = 0;

    boolean done = false;
    while (!done) {
      foundcursor = str.indexOf(ColorHelper.MARKER_CODE, parsecursor);
      if (foundcursor != -1) {
        out.append(str.substring(parsecursor, foundcursor));
        if (support) {
          out.append(addEscapeSequence(str.substring(foundcursor + 1, foundcursor + 2), forcebold));
        }
        parsecursor = foundcursor + 2;
      } else {
        out.append(str.substring(parsecursor, str.length()));
        done = true;
      }
    }

    /*
     * This will always add a "reset all" escape sequence
     * behind the input string.
     * Basically this is a good idea, because developers tend to
     * forget writing colored strings properly.
     */
    if (support) out.append(addEscapeSequence("a", false));

    return out.toString();
  }//colorize


  private String addEscapeSequence(String attribute, boolean forcebold) {

    StringBuffer tmpbuf = new StringBuffer(10);

    byte[] tmpbytes = attribute.getBytes();
    int key = (int) tmpbytes[0];

    tmpbuf.append((char) 27);
    tmpbuf.append((char) 91);
    //tmpbuf.append((new Integer(m_ColorMapping[key])).toString());
    int attr = m_ColorMapping[key];
    tmpbuf.append(attr);
    if (forcebold && attr != f) {
      tmpbuf.append((char) 59);
      tmpbuf.append(f);
    }
    tmpbuf.append((char) 109);

    return tmpbuf.toString();
  }//addEscapeSequence


  /**
   * Returns the reference of the Singleton instance.
   *
   * @return reference to Colorizer singleton instance.
   */
  public static Colorizer getReference() {
    if (c_Self != null) {
      return (Colorizer) c_Self;
    } else {
      return new Colorizer();
    }
  }//getReference

  /**
   * Test Harness *
   */

  private static void announceResult(boolean res) {
    if (res) {
      System.out.println("[#" + testcount + "] ok.");
    } else {
      System.out.println("[#" + testcount + "] failed (see possible StackTrace).");
    }
  }//announceResult

  private static int testcount = 0;
  private static Colorizer myColorizer;

  private static void announceTest(String what) {
    testcount++;
    System.out.println("Test #" + testcount + " [" + what + "]:");
  }//announceTest

  private static void bfcolorTest(String color) {
    System.out.println("->" + myColorizer.colorize(ColorHelper.boldcolorizeText("COLOR", color), true) + "<-");
  }//bfcolorTest

  private static void fcolorTest(String color) {
    System.out.println("->" + myColorizer.colorize(ColorHelper.colorizeText("COLOR", color), true) + "<-");
  }//fcolorTest

  private static void bcolorTest(String color) {
    System.out.println("->" + myColorizer.colorize(ColorHelper.colorizeBackground("     ", color), true) + "<-");
  }//bcolorTest

  /**
   * Invokes the build in test harness, and will produce styled and colored
   * output directly on the terminal.
   */
  public static void main(String[] args) {
    try {
      announceTest("Instantiation");
      myColorizer = Colorizer.getReference();
      announceResult(true);

      announceTest("Textcolor Tests");
      fcolorTest(ColorHelper.BLACK);
      fcolorTest(ColorHelper.RED);
      fcolorTest(ColorHelper.GREEN);
      fcolorTest(ColorHelper.YELLOW);
      fcolorTest(ColorHelper.BLUE);
      fcolorTest(ColorHelper.MAGENTA);
      fcolorTest(ColorHelper.CYAN);
      fcolorTest(ColorHelper.WHITE);
      announceResult(true);

      announceTest("Bold textcolor Tests");
      bfcolorTest(ColorHelper.BLACK);
      bfcolorTest(ColorHelper.RED);
      bfcolorTest(ColorHelper.GREEN);
      bfcolorTest(ColorHelper.YELLOW);
      bfcolorTest(ColorHelper.BLUE);
      bfcolorTest(ColorHelper.MAGENTA);
      bfcolorTest(ColorHelper.CYAN);
      bfcolorTest(ColorHelper.WHITE);
      announceResult(true);

      announceTest("Background Tests");
      bcolorTest(ColorHelper.BLACK);
      bcolorTest(ColorHelper.RED);
      bcolorTest(ColorHelper.GREEN);
      bcolorTest(ColorHelper.YELLOW);
      bcolorTest(ColorHelper.BLUE);
      bcolorTest(ColorHelper.MAGENTA);
      bcolorTest(ColorHelper.CYAN);
      bcolorTest(ColorHelper.WHITE);
      announceResult(true);

      announceTest("Mixed Color Tests");
      System.out.println("->" + myColorizer.colorize(ColorHelper.colorizeText("COLOR", ColorHelper.WHITE, ColorHelper.BLUE), true) + "<-");
      System.out.println("->" + myColorizer.colorize(ColorHelper.colorizeText("COLOR", ColorHelper.YELLOW, ColorHelper.GREEN), true) + "<-");
      System.out.println("->" + myColorizer.colorize(ColorHelper.boldcolorizeText("COLOR", ColorHelper.WHITE, ColorHelper.BLUE), true) + "<-");
      System.out.println("->" + myColorizer.colorize(ColorHelper.boldcolorizeText("COLOR", ColorHelper.YELLOW, ColorHelper.GREEN), true) + "<-");


      announceResult(true);

      announceTest("Style Tests");
      System.out.println("->" + myColorizer.colorize(ColorHelper.boldText("Bold"), true) + "<-");
      System.out.println("->" + myColorizer.colorize(ColorHelper.italicText("Italic"), true) + "<-");
      System.out.println("->" + myColorizer.colorize(ColorHelper.underlinedText("Underlined"), true) + "<-");
      System.out.println("->" + myColorizer.colorize(ColorHelper.blinkingText("Blinking"), true) + "<-");

      announceResult(true);

      announceTest("Mixed Color/Style Tests");
      System.out.println("->" +
          myColorizer.colorize(ColorHelper.boldText(ColorHelper.colorizeText("RED", ColorHelper.RED, false) +
          ColorHelper.colorizeText("BLUE", ColorHelper.BLUE, false) +
          ColorHelper.colorizeText("GREEN", ColorHelper.GREEN, false))
              , true) +
          "<-");
      System.out.println("->" +
          myColorizer.colorize(ColorHelper.boldText(ColorHelper.colorizeBackground("RED", ColorHelper.RED, false) +
          ColorHelper.colorizeBackground("BLUE", ColorHelper.BLUE, false) +
          ColorHelper.colorizeBackground("GREEN", ColorHelper.GREEN, false))
              , true) +
          "<-");
      System.out.println("->" +
          myColorizer.colorize(ColorHelper.boldText(ColorHelper.colorizeText("RED", ColorHelper.WHITE, ColorHelper.RED, false) +
          ColorHelper.colorizeText("BLUE", ColorHelper.WHITE, ColorHelper.BLUE, false) +
          ColorHelper.colorizeText("GREEN", ColorHelper.WHITE, ColorHelper.GREEN, false))
              , true) +
          "<-");


      announceResult(true);


      announceTest("Visible length test");
      String colorized = ColorHelper.boldcolorizeText("STRING", ColorHelper.YELLOW);

      System.out.println("->" + myColorizer.colorize(colorized, true) + "<-");
      System.out.println("Visible length=" + ColorHelper.getVisibleLength(colorized));

      colorized = ColorHelper.boldcolorizeText("BANNER", ColorHelper.WHITE, ColorHelper.BLUE) +
          ColorHelper.colorizeText("COLOR", ColorHelper.WHITE, ColorHelper.BLUE) +
          ColorHelper.underlinedText("UNDER");
      System.out.println("->" + myColorizer.colorize(colorized, true) + "<-");
      System.out.println("Visible length=" + ColorHelper.getVisibleLength(colorized));

      announceResult(true);

      if (false) throw new Exception();	//this will shut up jikes


      System.out.println("Forcing bold");
      System.out.println(myColorizer.colorize(ColorHelper.colorizeText("RED", ColorHelper.RED), true, true));

    } catch (Exception ex) {
      announceResult(false);
      ex.printStackTrace();
    }
  }//main (test routine)


//Constants
  private static final int S = 30; //black
  private static final int s = 40;
  private static final int R = 31; //red
  private static final int r = 41;
  private static final int G = 32; //green
  private static final int g = 42;
  private static final int Y = 33; //yellow
  private static final int y = 43;
  private static final int B = 34; //blue
  private static final int b = 44;
  private static final int M = 35; //magenta
  private static final int m = 45;
  private static final int C = 36; //cyan
  private static final int c = 46;
  private static final int W = 37; //white
  private static final int w = 47;

  private static final int f = 1;  /*bold*/

  private static final int d = 22; /*!bold*/ //normal color or normal intensity
  private static final int i = 3;  /*italic*/
  private static final int j = 23; /*!italic*/
  private static final int u = 4;  /*underlined*/
  private static final int v = 24; /*!underlined*/
  private static final int e = 5;  /*blink*/
  private static final int n = 25; /*steady = !blink*/
  private static final int h = 8;  /*hide = concealed characters*/
  private static final int a = 0;  /*all out*/


}//class Colorizer