/*
Copyright 2007 Infordata S.p.A.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

/*
!!V 04/06/97 rel. 1.00b- uses XI5250Emulator create5250Field factory method.
    ***
    30/06/98 rel. _.___- Swing, JBuilder2 e VSS.
 */
 
 
package net.infordata.em.tn5250;


import java.io.IOException;
import java.io.InputStream;

import net.infordata.em.tnprot.XITelnet;


///////////////////////////////////////////////////////////////////////////////

/**
 * 5250 SF Order
 *
 * @version  
 * @author   Valentino Proietti - Infordata S.p.A.
 */
public class XISFOrd extends XI5250Ord {

  protected byte[] FFW = new byte[2];
  protected byte[] FCW = new byte[2];
  protected byte   ivScreenAttr;
  protected int    ivFieldLen;


  @Override
  protected void readFrom5250Stream(InputStream inStream) throws IOException {
    byte bb;

    inStream.mark(1);
    bb = (byte)Math.max(0, inStream.read());
    // check if FFW is present
    if ((bb & 0xC0) == 0x40) {
      FFW[0] = bb;
      FFW[1] = (byte)Math.max(0, inStream.read());

      inStream.mark(1);
      bb = (byte)Math.max(0, inStream.read());
      // check if FCW is present
      if ((bb & 0xC0) == 0x80) {
        FCW[0] = bb;
        FCW[1] = (byte)Math.max(0, inStream.read());
      }
      else
        inStream.reset();
    }
    else
      inStream.reset();

    ivScreenAttr = (byte)Math.max(0, inStream.read());
    ivFieldLen = (Math.max(0, inStream.read()) << 8) + Math.max(0, inStream.read());
    //!!V effettuare check dei parametri
  }


  @Override
  protected void execute() {
    if (ivScreenAttr != 0) {
      //NO ivEmulator.setDefAttr(XITelnet.toInt(ivScreenAttr));
      ivEmulator.drawString(String.valueOf(XI5250Emulator.ATTRIBUTE_PLACE_HOLDER),
                            ivEmulator.getSBACol(), ivEmulator.getSBARow(),
                            ivScreenAttr);
      ivEmulator.setSBA(ivEmulator.getSBA() + 1);
    }

    // -1 to force attribute reload
    ivEmulator.addField(ivEmulator.create5250Field((byte[])FFW.clone(),
                                                   (byte[])FCW.clone(),
                                                   ivEmulator.getSBACol(),
                                                   ivEmulator.getSBARow(),
                                                   ivFieldLen, -1));
  }


  @Override
  public String toString() {
    return super.toString() + " [FFW=[" + XITelnet.toHex(FFW[0]) + "," +
        XITelnet.toHex(FFW[1]) + "]," +
        "FCW=[" + XITelnet.toHex(FCW[0]) + "," +
        XITelnet.toHex(FCW[1]) + "]," +
        XITelnet.toHex(ivScreenAttr) + "," + ivFieldLen + "]";
  }
}