SystemCommandSequence.java

package com.jediterm.terminal.emulator;

import com.google.common.base.Ascii;
import com.google.common.collect.Lists;
import com.jediterm.terminal.TerminalDataStream;

import java.io.IOException;
import java.util.List;

/**
 * @author traff
 */
public class SystemCommandSequence {
  private final List<Object> myArgs = Lists.newArrayList();

  private final StringBuilder mySequenceString = new StringBuilder();

  public SystemCommandSequence(TerminalDataStream dataStream) throws IOException {
    readSystemCommandSequence(dataStream);
  }

  private void readSystemCommandSequence(TerminalDataStream stream) throws IOException {
    boolean isNumber = true;
    int number = 0;
    StringBuilder string = new StringBuilder();

    while (true) {
      final char b = stream.getChar();
      mySequenceString.append(b);

      if (b == ';' || isEnd(b)) {
        if (isNumber) {
          myArgs.add(number);
        }
        else {
          myArgs.add(string.toString());
        }
        if (isEnd(b)) {
          break;
        }
        isNumber = true;
        number = 0;
        string = new StringBuilder();
      }
      else if (isNumber) {
        if ('0' <= b && b <= '9') {
          number = number * 10 + b - '0';
        }
        else {
          isNumber = false;
        }
        string.append(b);
      }
      else {
        string.append(b);
      }
    }
  }

  private static boolean isEnd(char b) {
    return b == Ascii.BEL || b == 0x9c;
  }

  public String getStringAt(int i) {
    if (i>=myArgs.size()) {
      return null;
    }
    Object val = myArgs.get(i);
    return val instanceof String ? (String)val : null;
  }

  public Integer getIntAt(int i) {
    if (i>=myArgs.size()) {
      return null;
    }
    Object val = myArgs.get(i);
    return val instanceof Integer? (Integer)val : null;
  }

  public String getSequenceString() {
    return mySequenceString.toString();
  }
}