com.bytezone.dm3270.orders.GraphicsEscapeOrder 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 GraphicsEscapeOrder extends Order {

  private final byte code;

  public GraphicsEscapeOrder(byte[] buffer, int offset) {
    assert buffer[offset] == Order.GRAPHICS_ESCAPE;
    code = buffer[offset + 1];

    this.buffer = new byte[2];
    this.buffer[0] = buffer[offset];
    this.buffer[1] = buffer[offset + 1];
  }

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

  @Override
  public boolean matchesPreviousOrder(Order order) {
    return order instanceof GraphicsEscapeOrder
        && this.code == ((GraphicsEscapeOrder) order).code;
  }

  @Override
  public String toString() {
    String duplicateText = duplicates == 0 ? "" : "x " + (duplicates + 1);
    return String.format("GE  : %02X %s", code, duplicateText);
  }

}