/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library 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 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.apps.charvabsh;
import bsh.ConsoleInterface;
import bsh.EvalError;
import bsh.Interpreter;
import bsh.TargetError;
import charva.awt.BorderLayout;
import charva.awt.Color;
import charva.awt.Container;
import charva.awt.Toolkit;
import charva.awt.event.ActionEvent;
import charva.awt.event.ActionListener;
import charva.awt.event.KeyAdapter;
import charva.awt.event.KeyEvent;
import charvax.swing.BoxLayout;
import charvax.swing.JFrame;
import charvax.swing.JLabel;
import charvax.swing.JMenu;
import charvax.swing.JMenuBar;
import charvax.swing.JMenuItem;
import charvax.swing.JOptionPane;
import charvax.swing.JPanel;
import charvax.swing.JScrollPane;
import charvax.swing.JTextArea;
import charvax.swing.border.TitledBorder;
import gnu.java.io.NullOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.net.MalformedURLException;
import java.net.URL;
import javax.naming.NameNotFoundException;
import org.jnode.shell.CommandShell;
import org.jnode.shell.Shell;
import org.jnode.shell.ShellException;
import org.jnode.shell.ShellUtils;
/**
* A charva based beanshell interface.
*/
public class CharvaBsh {
static String example = "int i=0;\nfor (i=0;i<2;i++)\nprint(i+\".\");\n return i;\n";
/**
* Startup method.
*/
public static void main(String[] args) {
Toolkit.getDefaultToolkit().register();
System.err.println("Starting Charva Shell");
CharvaShell testwin = new CharvaShell();
testwin.show();
}
static class CharvaShell extends JFrame {
private JPanel bshPanel = new JPanel();
private JPanel messagePanel = new JPanel();
private JLabel topLabel;
private JLabel bottomLabel;
private JTextArea editor;
private JTextArea output;
private Interpreter interpreter;
void showSaveDialog() {
String s = JOptionPane
.showInputDialog(this, "Enter a filename to save", "Save what file", JOptionPane.QUESTION_MESSAGE);
if (s == null) {
output.append("\nFile Save Cancelled.");
} else {
output.append("\nSaving file=" + s);
try {
saveText(s);
} catch (MalformedURLException e) {
e.printStackTrace();
output.append(e.getMessage());
} catch (IOException e) {
e.printStackTrace();
}
}
}
void showLoadDialog() {
String s = JOptionPane
.showInputDialog(this, "Enter a filename to load", "Load what file", JOptionPane.QUESTION_MESSAGE);
if (s == null) {
output.append("\nFile Load Cancelled.");
} else {
output.append("\nLoading file=" + s);
try {
loadText(s);
} catch (MalformedURLException e) {
e.printStackTrace();
output.append(e.getMessage());
} catch (IOException e) {
e.printStackTrace();
}
}
}
void loadText(String filename) throws IOException {
final URL url = new URL(filename);
final InputStream is = url.openConnection().getInputStream();
try {
int ch;
final StringBuffer buf = new StringBuffer();
while ((ch = is.read()) >= 0) {
buf.append((char) ch);
}
editor.setText(buf.toString());
repaint();
} finally {
is.close();
}
}
void saveText(String filename) throws IOException {
final URL url = new URL(filename);
final OutputStream os = url.openConnection().getOutputStream();
String text = editor.getText();
try {
for (int i = 0; i < text.length(); i++) {
char ch = text.charAt(i);
os.write(ch);
}
os.flush();
} finally {
os.close();
}
}
void debug(String text) {
output.setText(text);
repaint();
}
void done() {
debug("Called done in CharvaBsh.");
hide();
debug("Calling close");
Toolkit.getDefaultToolkit().close();
System.err.println("Finished with Done");
}
void requestShell() {
Toolkit.getDefaultToolkit().unregister();
debug("Finished requesting shell");
}
public CharvaShell() {
super("Charva Beanshell v1.0");
setForeground(Color.green);
setBackground(Color.black);
Container cp = super.getContentPane();
cp.setLayout(new BorderLayout());
addMenuBar();
messagePanel.setLayout(new BoxLayout(messagePanel, BoxLayout.Y_AXIS));
topLabel = new JLabel("F12[evaluate], F1[clear-output], F5[clear-editor]");
messagePanel.add(topLabel);
bottomLabel = new JLabel("");
messagePanel.add(bottomLabel);
cp.add(messagePanel, BorderLayout.SOUTH);
editor = new JTextArea(example, 8, 75);
JScrollPane scrollEditor = new JScrollPane(editor);
scrollEditor.setViewportBorder(new TitledBorder("Beanshell Editor"));
output = new JTextArea("BSH output", 7, 75);
output.setLineWrap(true);
JScrollPane scrollOutput = new JScrollPane(output);
scrollOutput.setViewportBorder(new TitledBorder("Beanshell Output"));
bshPanel.setLayout(new BorderLayout());
bshPanel.add(scrollEditor, BorderLayout.NORTH);
bshPanel.add(scrollOutput, BorderLayout.SOUTH);
cp.add(bshPanel, BorderLayout.CENTER);
editor.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent ke) {
if (ke.getKeyCode() == KeyEvent.VK_F12) {
evaluateText();
repaint();
}
if (ke.getKeyCode() == KeyEvent.VK_F1) {
output.setText("");
output.repaint();
}
if (ke.getKeyCode() == KeyEvent.VK_F5) {
editor.setText("");
editor.repaint();
}
}
});
editor.requestFocus();
// BSHOutputAdapter out = new BSHOutputAdapter(output);
ConsoleInterface bshConsole = new BSHConsole(output);
interpreter = new Interpreter(bshConsole);
interpreter.setClassLoader(Thread.currentThread().getContextClassLoader());
CharvaBshCommandInvoker shell = new CharvaBshCommandInvoker();
try {
interpreter.set("interpreter", interpreter);
interpreter.set("shell", shell);
} catch (EvalError evalError) {
writeError(evalError);
}
setLocation(0, 0);
setSize(80, 24);
validate();
}
private void addMenuBar() {
JMenuBar menubar = new JMenuBar();
JMenu jMenuFile = new JMenu("File");
jMenuFile.setMnemonic('F');
JMenuItem exit = new JMenuItem("Exit");
exit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae_) {
done();
}
});
JMenuItem loadItem = new JMenuItem("Load");
loadItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae_) {
showLoadDialog();
}
});
JMenuItem saveItem = new JMenuItem("Save");
saveItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae_) {
showSaveDialog();
}
});
JMenuItem eval = new JMenuItem("Evaluate");
eval.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae_) {
evaluateText();
repaint();
}
});
menubar.add(jMenuFile);
jMenuFile.add(eval);
jMenuFile.add(exit);
jMenuFile.add(saveItem);
jMenuFile.add(loadItem);
setJMenuBar(menubar);
}
private void evaluateText() {
interpreter.setClassLoader(Thread.currentThread().getContextClassLoader());
String sourcecode = editor.getText();
// System.out.println( "Evaluating source string=" + sourcecode );
topLabel.setText("Evaluating...");
repaint();
// Interpreter interpreter = new Interpreter();
try {
Object out = interpreter.eval(sourcecode);
if (out != null) {
bottomLabel.setText("Result=" + out);
} else {
bottomLabel.setText("Null Result.");
}
topLabel.setText("Press F12 to Evaluate.");
repaint();
} catch (EvalError evalError) {
writeError(evalError);
}
}
private void writeError(EvalError evalError) {
output.append("<Evaluation Error>\n" + evalError);
if (evalError instanceof TargetError) {
TargetError te = (TargetError) evalError;
StringWriter wr = new StringWriter();
Throwable target = te.getTarget();
target.printStackTrace(new PrintWriter(wr));
String text = wr.toString();
output.append("\n" + text);
}
}
}
static class BSHConsole implements ConsoleInterface {
BSHOutputAdapter out;
Reader reader = new StringReader("456");
public BSHConsole(JTextArea output) {
this.out = new BSHOutputAdapter(output);
}
public Reader getIn() {
return reader;
}
public PrintStream getOut() {
return out;
}
public PrintStream getErr() {
return out;
}
public void println(Object o) {
out.println(o);
}
public void print(Object o) {
out.print(o);
}
public void error(Object o) {
out.print(o);
}
}
static class BSHOutputAdapter extends PrintStream {
JTextArea target;
public BSHOutputAdapter(JTextArea target) {
this(target, new NullOutputStream());
}
public BSHOutputAdapter(JTextArea target, OutputStream out) {
super(out);
this.target = target;
}
public void print(String s) {
target.append(s);
target.repaint();
}
public void println(String s) {
target.append(s + "\n");
target.repaint();
}
public void println(Object obj) {
if (obj == null) {
println("null");
} else {
println(obj.toString());
}
}
public void print(Object obj) {
if (obj == null) {
print("null");
} else {
print(obj.toString());
}
}
public void println() {
print("\n");
}
public void print(int i) {
print(i + "");
}
public void println(int i) {
println("" + i);
}
}
static class CharvaBshCommandInvoker {
private Shell shell;
public CharvaBshCommandInvoker() {
try {
shell = ShellUtils.getShellManager().getCurrentShell();
} catch (NameNotFoundException e) {
e.printStackTrace();
}
}
public void invoke(String command) {
if (shell != null) {
if (shell instanceof CommandShell) {
CommandShell cs = (CommandShell) shell;
try {
cs.runCommand(command);
} catch (ShellException ex) {
System.err.println("Command invocation failed: " + ex.getMessage());
}
} else {
System.err.println("Shell wasn't a CommandShell: " + shell.getClass());
}
} else {
System.err.println("Shell is null.");
}
}
}
}