com.bytezone.dm3270.orders.FormatControlOrder Maven / Gradle / Ivy

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This is a trimmed down version of https://github.com/dmolony/dm3270 to be used as TN3270 client library

There is a newer version: 0.15-lib

package com.bytezone.dm3270.orders;

import com.bytezone.dm3270.display.DisplayScreen;
import com.bytezone.dm3270.display.Pen;

public class FormatControlOrder extends Order {

  private static byte[] orderValues =
      {FCO_NULL, FCO_SUBSTITUTE, FCO_DUPLICATE, FCO_FIELD_MARK, FCO_FORM_FEED,
          FCO_CARRIAGE_RETURN, FCO_NEWLINE, FCO_END_OF_MEDIUM, FCO_EIGHT_ONES};
  private static String[] orderNames =
      {"Null", "Substitute", "Duplicate", "Field Mark", "Form Feed", "Return", "Newline",
          "EOM", "8 ones"};

  public FormatControlOrder(byte[] buffer, int offset) {
    this.buffer = new byte[1];
    this.buffer[0] = buffer[offset];
  }

  @Override
  public void process(DisplayScreen screen) {
    Pen pen = screen.getPen();
    int max = duplicates;
    // always do at least one
    while (max-- >= 0) {
      pen.write((byte) 0x40);
    }
  }

  @Override
  public boolean matchesPreviousOrder(Order order) {
    return order instanceof FormatControlOrder
        && this.buffer[0] == ((FormatControlOrder) order).buffer[0];
  }

  @Override
  public String toString() {
    byte value = buffer[0];
    String text = "????";
    for (int i = 0; i < orderValues.length; i++) {
      if (value == orderValues[i]) {
        text = orderNames[i];
        break;
      }
    }
    String duplicateText = duplicates == 0 ? "" : "x " + (duplicates + 1);
    return String.format("FCO : %-12s : %02X %s", text, buffer[0], duplicateText);
  }

}