public static WorkstationCommandBase ParseFactory(InputByteArray InputArray)
{
WorkstationCommandBase dsCmd = null;
if (InputArray.RemainingLength >= 2)
{
// command codes as documented on 15.2 - 1 of 5494 function ref manual
var buf = InputArray.PeekBytes(2);
if (buf[0] == 0x04)
{
var wrkstnCode = buf[1].ToWorkstationCode();
if (wrkstnCode != null)
{
var code = wrkstnCode.Value;
if (code == WorkstationCode.ClearUnit)
{
dsCmd = new ClearUnitCommand(InputArray);
}
else if (code == WorkstationCode.WTD)
{
dsCmd = new WriteToDisplayCommand(InputArray);
}
else if (code == WorkstationCode.ReadMdtFields)
{
dsCmd = new ReadMdtFieldsCommand(InputArray);
}
// 04 F3. write structure field. Used as vehicle for the D9 70 5250 query
// command.
else if (code == WorkstationCode.WriteStructuredField)
{
dsCmd = new WriteStructuredFieldCommand(InputArray);
}
else if (code == WorkstationCode.SaveScreen)
{
dsCmd = new SaveScreenCommand(InputArray);
}
else if (code == WorkstationCode.RestoreScreen)
{
dsCmd = new RestoreScreenCommand(InputArray);
}
else
{
throw new Exception(
"workstation data stream command code not supported. " +
code.ToString());
}
}
}
}
return(dsCmd);
}
public static byte[] BuildSaveScreenResponse(ScreenContent ScreenContent)
{
var ra = new ByteArrayBuilder();
// data stream header.
{
var buf = DataStreamHeader.Build(50, TerminalOpcode.SaveScreen, 0, 0);
ra.Append(buf);
}
// restore screen workstation command.
{
var cmd = new RestoreScreenCommand();
ra.Append(cmd.ToBytes());
}
// clear unit command.
if (ScreenContent.ScreenDim.GetIsWideScreen( ) == true)
{
var cmd = new ClearUnitAlternateCommand(0x00);
ra.Append(cmd.ToBytes());
}
else
{
var cmd = new ClearUnitCommand();
ra.Append(cmd.ToBytes());
}
// WTD command.
{
var ordersByteStream = ScreenContent.BuildOrderStream( );
var buf = WriteToDisplayCommand.Build(0x00, 0x18, ordersByteStream);
ra.Append(buf);
}
// update length of response data stream.
{
var wk = new ByteArrayBuilder();
wk.AppendBigEndianShort((short)ra.Length);
ra.CopyToBuffer(wk.ToByteArray(), 0);
}
// IAC EOR
{
ra.Append(EOR_Command.Build());
}
return(ra.ToByteArray());
}