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/*
* #%L
* The AIBench Shell Plugin
* %%
* Copyright (C) 2006 - 2017 Daniel Glez-Peña and Florentino Fdez-Riverola
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
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*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
/*****************************************************************************
* *
* This file is part of the BeanShell Java Scripting distribution. *
* Documentation and updates may be found at http://www.beanshell.org/ *
* *
* Sun Public License Notice: *
* *
* The contents of this file are subject to the Sun Public License Version *
* 1.0 (the "License"); you may not use this file except in compliance with *
* the License. A copy of the License is available at http://www.sun.com *
* *
* The Original Code is BeanShell. The Initial Developer of the Original *
* Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright *
* (C) 2000. All Rights Reserved. *
* *
* GNU Public License Notice: *
* *
* Alternatively, the contents of this file may be used under the terms of *
* the GNU Lesser General Public License (the "LGPL"), in which case the *
* provisions of LGPL are applicable instead of those above. If you wish to *
* allow use of your version of this file only under the terms of the LGPL *
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* *
* Patrick Niemeyer ([email protected]) *
* Author of Learning Java, O'Reilly & Associates *
* http://www.pat.net/~pat/ *
* *
*****************************************************************************/
package bsh.util;
import java.awt.Color;
import java.awt.Font;
import java.awt.Frame;
import java.awt.TextArea;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.io.PrintStream;
import java.io.Reader;
import java.util.Vector;
import bsh.ConsoleInterface;
import bsh.Interpreter;
/*
* This should go away eventually... Native AWT sucks. Use JConsole and the
* desktop() environment.
*
* Notes: todo - clean up the watcher thread, set daemon status
*/
/**
* An old AWT based console for BeanShell.
*
* I looked everwhere for one, and couldn't find anything that worked. I've
* tried to keep this as small as possible, no frills. (Well, one frill - a
* simple history with the up/down arrows) My hope is that this can be moved to
* a lightweight (portable) component with JFC soon... but Swing is still very
* slow and buggy.
*
* Done: see JConsole.java
*
* The big Hack:
*
* The heinous, disguisting hack in here is to keep the caret (cursor) at the
* bottom of the text (without the user having to constantly click at the
* bottom). It wouldn't be so bad if the damned setCaretPostition() worked as
* expected. But the AWT TextArea for some insane reason treats NLs as
* characters... oh, and it refuses to let you set a caret position greater than
* the text length - for which it counts NLs as *one* character. The glorious
* hack to fix this is to go the TextComponent peer. I really hate this.
*
* Out of date:
*
* This class is out of date. It does not use the special blocking piped input
* stream that the jconsole uses.
*
* Deprecation:
*
* This file uses two deprecate APIs. We want to be a PrintStream so that we can
* redirect stdout to our console... I don't see a way around this. Also we have
* to use getPeer() for the big hack above.
*/
public class AWTConsole extends TextArea implements ConsoleInterface, Runnable, KeyListener {
private OutputStream outPipe;
private InputStream inPipe;
// formerly public
private InputStream in;
private PrintStream out;
public Reader getIn() {
return new InputStreamReader(in);
}
public PrintStream getOut() {
return out;
}
public PrintStream getErr() {
return out;
}
private StringBuffer line = new StringBuffer();
private String startedLine;
private int textLength = 0;
private Vector history = new Vector();
private int histLine = 0;
public AWTConsole(int rows, int cols, InputStream cin, OutputStream cout) {
super(rows, cols);
setFont(new Font("Monospaced", Font.PLAIN, 14));
setEditable(false);
addKeyListener(this);
outPipe = cout;
if (outPipe == null) {
outPipe = new PipedOutputStream();
try {
in = new PipedInputStream((PipedOutputStream) outPipe);
} catch (IOException e) {
print("Console internal error...");
}
}
// start the inpipe watcher
inPipe = cin;
new Thread(this).start();
requestFocus();
}
public void keyPressed(KeyEvent e) {
type(e.getKeyCode(), e.getKeyChar(), e.getModifiers());
e.consume();
}
public AWTConsole() {
this(12, 80, null, null);
}
public AWTConsole(InputStream in, OutputStream out) {
this(12, 80, in, out);
}
public void type(int code, char ch, int modifiers) {
switch (code) {
case (KeyEvent.VK_BACK_SPACE ):
if (line.length() > 0) {
line.setLength(line.length() - 1);
replaceRange("", textLength - 1, textLength);
textLength--;
}
break;
case (KeyEvent.VK_ENTER ):
enter();
break;
case (KeyEvent.VK_U ):
if ((modifiers & InputEvent.CTRL_MASK) > 0) {
int len = line.length();
replaceRange("", textLength - len, textLength);
line.setLength(0);
histLine = 0;
textLength = getText().length();
} else
doChar(ch);
break;
case (KeyEvent.VK_UP ):
historyUp();
break;
case (KeyEvent.VK_DOWN ):
historyDown();
break;
case (KeyEvent.VK_TAB ):
line.append(" ");
append(" ");
textLength += 4;
break;
/*
* case ( KeyEvent.VK_LEFT ): if (line.length() > 0) { break;
*/
// Control-C
case (KeyEvent.VK_C ):
if ((modifiers & InputEvent.CTRL_MASK) > 0) {
line.append("^C");
append("^C");
textLength += 2;
} else
doChar(ch);
break;
default:
doChar(ch);
}
}
private void doChar(char ch) {
if ((ch >= ' ') && (ch <= '~')) {
line.append(ch);
append(String.valueOf(ch));
textLength++;
}
}
private void enter() {
String s;
if (line.length() == 0) // special hack for empty return!
s = ";\n";
else {
s = line + "\n";
history.addElement(line.toString());
}
line.setLength(0);
histLine = 0;
append("\n");
textLength = getText().length(); // sync for safety
acceptLine(s);
setCaretPosition(textLength);
}
/*
* Here's the really disguisting hack. We have to get to the peer
* because TextComponent will refuse to let us set us set a caret
* position greater than the text length. Great. What a piece of crap.
*/
public void setCaretPosition(int pos) {
((java.awt.peer.TextComponentPeer) getPeer()).setCaretPosition(pos + countNLs());
}
/*
* This is part of a hack to fix the setCaretPosition() bug Count the
* newlines in the text
*/
private int countNLs() {
String s = getText();
int c = 0;
for (int i = 0; i < s.length(); i++)
if (s.charAt(i) == '\n')
c++;
return c;
}
private void historyUp() {
if (history.size() == 0)
return;
if (histLine == 0) // save current line
startedLine = line.toString();
if (histLine < history.size()) {
histLine++;
showHistoryLine();
}
}
private void historyDown() {
if (histLine == 0)
return;
histLine--;
showHistoryLine();
}
private void showHistoryLine() {
String showline;
if (histLine == 0)
showline = startedLine;
else
showline = (String) history.elementAt(history.size() - histLine);
replaceRange(showline, textLength - line.length(), textLength);
line = new StringBuffer(showline);
textLength = getText().length();
}
private void acceptLine(String line) {
if (outPipe == null)
print("Console internal error...");
else
try {
outPipe.write(line.getBytes());
outPipe.flush();
} catch (IOException e) {
outPipe = null;
throw new RuntimeException("Console pipe broken...");
}
}
public void println(Object o) {
print(String.valueOf(o) + "\n");
}
public void error(Object o) {
print(o, Color.red);
}
// No color
public void print(Object o, Color c) {
print("*** " + String.valueOf(o));
}
synchronized public void print(Object o) {
append(String.valueOf(o));
textLength = getText().length(); // sync for safety
}
private void inPipeWatcher() throws IOException {
if (inPipe == null) {
PipedOutputStream pout = new PipedOutputStream();
out = new PrintStream(pout);
inPipe = new PipedInputStream(pout);
}
byte[] ba = new byte[256]; // arbitrary blocking factor
int read;
while ((read = inPipe.read(ba)) != -1)
print(new String(ba, 0, read));
println("Console: Input closed...");
}
public void run() {
try {
inPipeWatcher();
} catch (IOException e) {
println("Console: I/O Error...");
}
}
public static void main(String args[]) {
AWTConsole console = new AWTConsole();
final Frame f = new Frame("Bsh Console");
f.add(console, "Center");
f.pack();
f.show();
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
f.dispose();
}
});
Interpreter interpreter = new Interpreter(console);
interpreter.run();
}
public String toString() {
return "BeanShell AWTConsole";
}
// unused
public void keyTyped(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
}
}
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