com.goldencode.terminal

Class VT100Emulator

java.lang.Object

com.goldencode.terminal.NativePty

com.goldencode.terminal.MasterPty

com.goldencode.terminal.VT100Emulator

All Implemented Interfaces:

java.lang.Runnable

public class VT100Emulator
extends MasterPty
implements java.lang.Runnable

This is an implementation of DEC VT-100 specification.

Author:

mag

Field Summary

Fields

Modifier and Type	Field and Description
private int	attribute Cell attributes and colors
private AttributeStorage	attrStorage attribute storage
private int	color Cell attributes and colors
private static byte[]	DA_RESPONSE DA response
private static byte	ESC Escape code
private static byte[]	IDENT_RESPONSE Identify terminal response
protected VT100Keyboard	keyboard VT-100 keyboard
private static CentralLogger	LOG Logger
private TerminalMode	mode Terminal mode
protected VT100Renderer	pty Master PTY interface
private boolean	running Main loop is running
private java.util.Set<java.lang.Integer>	tabStops Tab stops
private boolean	terminate Request terminate
private static java.lang.String	VT_100 Terminal type

Fields inherited from class com.goldencode.terminal.NativePty

mfd_inp, mfd_out, pid

Constructor Summary

Constructors

Constructor and Description
VT100Emulator(VT100Renderer pty, VT100Keyboard keyboard, java.lang.String[] cmdLine, int overlay) Constructor.

Method Summary

Modifier and Type	Method and Description
private char	convertUTF8toUTF16(java.io.ByteArrayOutputStream utf8) Convert a UTF-8 sequence to a UTF-16 character.
private void	doAnsi() Process ANSI mode
private void	doEscSequence() Process ESC sequences
private void	doVT52() Process VT52 mode
void	doWork() Main loop.
private void	goNextTabstop() Go to the next tab stop position.
private boolean	isDigit(byte b) Test if byte is a ASCII decimal digit.
private void	processCSI() process ESC [ Pn;...Pn x
private void	putUtf8Stream(int v0) Read an UTF-8 byte sequence transform to UTF-16 and store on a cell structure.
void	run()
void	stopRunning() Request terminate.

Methods inherited from class com.goldencode.terminal.MasterPty

await, get, getPid, nextByte, put, put, put, sh, waitFor

Methods inherited from class com.goldencode.terminal.NativePty

read, shell, waitPid, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG

private static final CentralLogger LOG

Logger

VT_100

private static final java.lang.String VT_100

Terminal type

See Also:

Constant Field Values

ESC

private static final byte ESC

Escape code

See Also:

Constant Field Values

DA_RESPONSE

private static final byte[] DA_RESPONSE

DA response

IDENT_RESPONSE

private static final byte[] IDENT_RESPONSE

Identify terminal response

mode

private TerminalMode mode

Terminal mode

attribute

private int attribute

Cell attributes and colors

color

private int color

Cell attributes and colors

attrStorage

private AttributeStorage attrStorage

attribute storage

tabStops

private java.util.Set<java.lang.Integer> tabStops

Tab stops

running

private volatile boolean running

Main loop is running

terminate

private volatile boolean terminate

Request terminate

keyboard

protected VT100Keyboard keyboard

VT-100 keyboard

pty

protected VT100Renderer pty

Master PTY interface

Constructor Detail

VT100Emulator

public VT100Emulator(VT100Renderer pty,
                     VT100Keyboard keyboard,
                     java.lang.String[] cmdLine,
                     int overlay)

Constructor. Used when switching between P2J and emulator.

Parameters:

pty - A VT-100 renderer.

keyboard - A VT-100 keyboard handler.

cmdLine - Command line arguments.

overlay - Overlapped mode.

Method Detail

doWork

public void doWork()

Main loop. The thread should exit when no bytes are available to read form master pty and a request to terminate is on place.

doEscSequence

private void doEscSequence()

Process ESC sequences

doAnsi

private void doAnsi()

Process ANSI mode

processCSI

private void processCSI()

process ESC [ Pn;...Pn x

doVT52

private void doVT52()

Process VT52 mode

run

public void run()

Specified by:

run in interface java.lang.Runnable

goNextTabstop

private void goNextTabstop()

Go to the next tab stop position. If no more tab stops go to end of line.

putUtf8Stream

private void putUtf8Stream(int v0)

Read an UTF-8 byte sequence transform to UTF-16 and store on a cell structure.

Parameters:

v0 - First value in stream;

convertUTF8toUTF16

private char convertUTF8toUTF16(java.io.ByteArrayOutputStream utf8)

Convert a UTF-8 sequence to a UTF-16 character. If sequence cannot be converted to UTF-16 replaced character is returned.

Parameters:

utf8 - UTF-8 byte sequence.

Returns:

Converted UTF-16 character or 0 if cannot convert.

isDigit

private boolean isDigit(byte b)

Test if byte is a ASCII decimal digit.

Parameters:

b - Input byte.

Returns:

true if is a digit false otherwise.

stopRunning

public void stopRunning()

Request terminate. The thread should exit when no bytes are available to read form master pty.