/*
* Adito
*
* Copyright (C) 2003-2006 3SP LTD. All Rights Reserved
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
* 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 Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package com.adito.agent.client.gui.awt;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.TextArea;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Method;
import com.sshtools.ui.awt.UIUtil;
import com.adito.agent.client.Console;
/**
* {@link OutputStream} implementation that writes a GUI console component. This
* may be set as the {@link System#out} stream as a generic GUI console.
* <p>
* In order to improve performance, the frame will not be created and output
* will not be captured until it is first shown (usually as the result of a user
* action).
*/
public class AWTConsoleOutputStream extends Console {
// Private instace variables
private StringBuffer buf = new StringBuffer();
private Frame frame;
private TextArea textArea;
private Method deleteMethod;
private OutputStream oldSysOut;
private boolean userScrolled;
/**
* Constructor.
*
* @param oldSysOut previous system out stream to also write to
*/
public AWTConsoleOutputStream(OutputStream oldSysOut) {
this.oldSysOut = oldSysOut;
}
/**
* Show the console.
*/
public void show() {
if (textArea == null) {
try {
deleteMethod = StringBuffer.class.getMethod("delete", new Class[] { int.class, int.class }); //$NON-NLS-1$
} catch (Throwable t) {
}
textArea = new TextArea();
textArea.setEditable(false);
textArea.setBackground(Color.white);
textArea.setForeground(Color.black);
Panel panel = new Panel(new BorderLayout());
panel.setBackground(Color.gray);
panel.setForeground(Color.black);
panel.add(textArea, BorderLayout.CENTER);
Panel buttonPanel = new Panel(new FlowLayout(FlowLayout.RIGHT));
buttonPanel.setBackground(Color.gray);
buttonPanel.setForeground(Color.black);
Button clear = new Button(Messages.getString("ConsoleOutputStream.actions.clear")); //$NON-NLS-1$
clear.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
clear();
}
});
buttonPanel.add(clear);
Button close = new Button(Messages.getString("ConsoleOutputStream.actions.close")); //$NON-NLS-1$
close.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
frame.setVisible(false);
}
});
buttonPanel.add(close);
panel.add(buttonPanel, BorderLayout.SOUTH);
frame = new Frame(Messages.getString("ConsoleOutputStream.title")); //$NON-NLS-1$
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent evt) {
frame.setVisible(false);
}
});
frame.setIconImage(UIUtil.loadImage(getClass(), "/images/frame-agent.gif")); //$NON-NLS-1$
frame.add(panel);
frame.pack();
frame.setLocation(100, 100);
frame.setSize(300, 400);
}
textArea.setText(buf.toString());
frame.setVisible(true);
frame.toFront();
textArea.setCaretPosition(buf.length());
userScrolled = false;
}
void clear() {
synchronized (buf) {
buf.setLength(0);
if (frame.isVisible()) {
textArea.setText(buf.toString());
textArea.setCaretPosition(buf.length());
}
}
}
void append(String text) {
synchronized (buf) {
buf.append(text);
if (buf.length() > 65535) {
if (deleteMethod != null) {
try {
deleteMethod.invoke(buf, new Object[] { new Integer(0), new Integer(buf.length() - 65535) });
} catch (Throwable t) {
String newBuf = buf.toString().substring(buf.length() - 65535);
buf.setLength(0);
buf.append(newBuf);
}
} else {
String newBuf = buf.toString().substring(buf.length() - 65535);
buf.setLength(0);
buf.append(newBuf);
}
}
if (frame != null && frame.isVisible()) {
textArea.setText(buf.toString());
if (!userScrolled) {
textArea.setCaretPosition(buf.length());
}
}
}
}
/*
* (non-Javadoc)
*
* @see java.io.OutputStream#write(int)
*/
public void write(int b) throws IOException {
append(String.valueOf((char) b));
if (oldSysOut != null) {
oldSysOut.write(b);
}
}
/*
* (non-Javadoc)
*
* @see java.io.OutputStream#write(byte[], int, int)
*/
public void write(byte[] buf, int off, int len) throws IOException {
append(new String(buf, off, len));
if (oldSysOut != null) {
oldSysOut.write(buf, off, len);
}
}
/*
* (non-Javadoc)
*
* @see java.io.OutputStream#flush()
*/
public void flush() throws IOException {
super.flush();
if (oldSysOut != null) {
oldSysOut.flush();
}
}
public void dispose() {
if(frame != null)
frame.dispose();
}
}