jay.yydebug
Class yyJInputStream

java.lang.Object
  java.io.InputStream
      jay.yydebug.yyJInputStream

All Implemented Interfaces:

KeyListener, Closeable, EventListener

public class yyJInputStream
extends InputStream
implements KeyListener

used to reroute standard input from a JTextArea. Feeds all read methods from listening to typed keys. Should not deadlock because one should generally not read from within the event thread.

While this implementation avoids Java generics, code for a generic version has simply been commented out.

Field Summary

protected StringBuffer	line line edit buffer.
protected ArrayList	queue completed lines, ready to be read.

Constructor Summary

yyJInputStream()

Method Summary

int	available()
void	close()
protected void	doKey(JTextArea ta, char ch, boolean paste) process one typed or pasted character.
void	keyPressed(KeyEvent ke) this one ensures that you can only type at the end and implements control-C as copy and control-V as paste key if AWTPermission(accessClipboard) is granted.
void	keyReleased(KeyEvent ke)
void	keyTyped(KeyEvent ke)
int	read()
int	read(byte[] b, int off, int len)
long	skip(long len) returns 0: cannot skip on a terminal.

Methods inherited from class java.io.InputStream

mark, markSupported, read, reset

Methods inherited from class java.lang.Object

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

Field Detail

line

protected final StringBuffer line

line edit buffer.

queue

protected ArrayList queue

completed lines, ready to be read. Invariant: null after close().

Constructor Detail

yyJInputStream

public yyJInputStream()

Method Detail

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b,
                int off,
                int len)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

skip

public long skip(long len)

returns 0: cannot skip on a terminal.

Overrides:

skip in class InputStream

keyPressed

public void keyPressed(KeyEvent ke)

this one ensures that you can only type at the end and implements control-C as copy and control-V as paste key if AWTPermission(accessClipboard) is granted. This is executed within the event thread.

BUG: paste should be based on the platform paste key; however, Safari does not send that one to an applet.

Specified by:

keyPressed in interface KeyListener

keyTyped

public void keyTyped(KeyEvent ke)

Specified by:

keyTyped in interface KeyListener

doKey

protected void doKey(JTextArea ta,
                     char ch,
                     boolean paste)

process one typed or pasted character. The caret position is not updated for pasting.

keyReleased

public void keyReleased(KeyEvent ke)

Specified by:

keyReleased in interface KeyListener