swingshellconsole.java

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/*
 *  Copyright (c) 2001 Sun Microsystems, Inc.  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in
 *  the documentation and/or other materials provided with the
 *  distribution.
 *
 *  3. The end-user documentation included with the redistribution,
 *  if any, must include the following acknowledgment:
 *  "This product includes software developed by the
 *  Sun Microsystems, Inc. for Project JXTA."
 *  Alternately, this acknowledgment may appear in the software itself,
 *  if and wherever such third-party acknowledgments normally appear.
 *
 *  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
 *  not be used to endorse or promote products derived from this
 *  software without prior written permission. For written
 *  permission, please contact Project JXTA at http://www.jxta.org.
 *
 *  5. Products derived from this software may not be called "JXTA",
 *  nor may "JXTA" appear in their name, without prior written
 *  permission of Sun.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED.  IN NO EVENT SHALL SUN MICROSYSTEMS OR
 *  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 *  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 *  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 *  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *  ====================================================================
 *
 *  This software consists of voluntary contributions made by many
 *  individuals on behalf of Project JXTA.  For more
 *  information on Project JXTA, please see
 *  <http://www.jxta.org/>.
 *
 *  This license is based on the BSD license adopted by the Apache Foundation.
 *
 *  $Id: SwingShellConsole.java,v 1.8 2006/06/14 16:37:12 bondolo Exp $
 */
package net.jxta.impl.shell;

import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.awt.event.InputEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JViewport;

import java.awt.HeadlessException;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.IOException;
import java.io.InterruptedIOException;
import javax.swing.text.BadLocationException;

import java.util.logging.Level;
import java.util.logging.Logger;

import net.jxta.credential.Credential;
import net.jxta.membership.MembershipService;
import net.jxta.peergroup.PeerGroup;
import net.jxta.rendezvous.RendezVousService;
import net.jxta.rendezvous.RendezvousEvent;
import net.jxta.rendezvous.RendezvousListener;

import net.jxta.exception.PeerGroupException;

import net.jxta.impl.rendezvous.RendezVousServiceInterface;
import net.jxta.impl.rendezvous.rpv.PeerView;
import net.jxta.impl.rendezvous.rpv.PeerViewEvent;
import net.jxta.impl.rendezvous.rpv.PeerViewListener;

import net.jxta.impl.shell.bin.Shell.Shell;

/**
 *  A Swing based container for JXTA Shell sessions.
 **/
public class SwingShellConsole extends ShellConsole {
    
    /**
     *  Log4J Logger
     **/
    private static final java.util.logging.Logger LOG = java.util.logging.Logger.getLogger(SwingShellConsole.class.getName());;
    
    /**
     *  The number of consoles opened
     **/
    private static int consoleCount = 0;
    
    /**
     *  Lines of console input awaiting shell processing.
     **/
    private List lines = new ArrayList();
    
    /**
     *  The panel in which our stuff lives.
     **/
    private JPanel panel;
   	
    /**
     * Is this console embedded in another application? If yes,
     * the Shell must ignore exit commands.
     */
    private boolean embedded = false;
    
    /**
     *  The frame that holds the TextArea object making up the terminal. If we
     *  are running in a panel provided by someone else then this will not be
     *  initialized.
     **/
    private JFrame frame = null;
    
    /**
     *  The TextArea object that displays the status
     **/
    private JLabel statusStart = null;
    
    /**
     *  The TextArea object that displays the status
     **/
    private JLabel statusEnd = null;
    
    /**
     *  The TextArea object that displays the data
     **/
    private JTextArea text = null;
    
    /**
     *  The length of the static text displayed, excludes the prompt and the
     *   current input line.
     **/
    private int textLength = 0;
    
    /**
     *  Length of the prompt.
     **/
    private int promptLength = 0;
    
    /**
     *  Length of the current input line.
     **/
    private int lineLength = 0;
    
    /**
     *  Location of the insertion point within the current input line
     **/
    private int lineInsert = 0;
    
    /**
     *  Keeps bits for the status line.
     **/
    private StatusKeeper statusKeeper = null;
    
    /**
     *  Creates a new terminal window with rows row and cols columns to display.
     *
     * @param  consoleName  the name of the console
     * @param rootApp   The root shell application for this console instance.
     * @param  rows     the number of rows displayed
     * @param  cols     the number of columns displayed
     **/
    public SwingShellConsole( ShellApp rootApp, String consoleName, int rows, int cols) {
        this( null, rootApp, consoleName, rows, cols);
    }
    
    /**
     *  Creates a new terminal window with rows row and cols columns to display.
     *
     * @param  inPanel  The panel in which the shell console will live.
     * @param rootApp   The root shell application for this console instance.
     * @param  consoleName  the name of the console
     * @param  rows     the number of rows displayed
     * @param  cols     the number of columns displayed
     **/
    public SwingShellConsole(JPanel inPanel, ShellApp rootApp, String consoleName, int rows, int cols) {
        super( rootApp, consoleName );
        
        String consoleFullName;
        synchronized ( this.getClass() ) {
            consoleFullName = consoleName + " - " + (++consoleCount);
        }
        
        try {
            if (null == inPanel) {
                panel = new JPanel(new GridBagLayout());
                // create a frame for it to live in.
                frame = new JFrame(consoleFullName);
                frame.getContentPane().add(panel);
                frame.addWindowListener(new WindowAdapter() {

                                            /**
                                             * {@inheritDoc}
                                             */

                                            public void windowClosing(WindowEvent e) {
                                                ShellApp sa = getShellApp();

                                                if (null != sa) {
                                                    sa.stopApp();
                                                }
                                            }

                                            /**
                                             * {@inheritDoc}
                                             */

                                            public void windowGainedFocus(WindowEvent e) {
                                                text.getCaret().setVisible(true);
                                            }

                                            /**
                                             * {@inheritDoc}
                                             */

                                            public void windowLostFocus(WindowEvent e) {
                                                text.getCaret().setVisible(false);
                                            }
                                        });
            }
            else {
                panel = inPanel;
                panel.setLayout(new GridBagLayout());
                embedded = true;
            }
        }
        catch (InternalError error) {
            // this will occur is AWT is not available or can't be initialized (most
            // commonly on unix machines in a terminal window).
            if (LOG.isLoggable(java.util.logging.Level.SEVERE)) {
                LOG.finer("Could not initialize AWT, using TTY Console mode");
            }
            HeadlessException horseman = new HeadlessException("InternalError");

            horseman.initCause(error);
            throw horseman;
        }
        
        // Shell embedded in another application 
        if( null == System.getProperty(Shell.JXTA_SHELL_EMBEDDED_KEY)) {
            try {
                System.setProperty(Shell.JXTA_SHELL_EMBEDDED_KEY, Boolean.toString(embedded));
            } catch( SecurityException couldntSet ) {
                ;
            }
        }

        int fontsize = 12;
        String fontname = System.getProperty("SHELLFONTNAME", "Lucida Sans Typewriter");
        String fontsizeProp = System.getProperty("SHELLFONTSIZE");
        if (fontsizeProp != null) {
            try {
                fontsize = Integer.valueOf(fontsizeProp).intValue();
            } catch (NumberFormatException e) {
                // will use default size
                ;
            }
        }
        
        this.statusStart = new JLabel( " ", JLabel.LEADING);
        statusStart.setFont(new Font(fontname, Font.PLAIN, fontsize));
        
        GridBagConstraints constr = new GridBagConstraints();
        
        constr.gridwidth = 1; constr.gridheight = 1;
        constr.gridx = 0; constr.gridy = 0;
        constr.weightx = 1; constr.weighty = 0;
        constr.anchor = GridBagConstraints.FIRST_LINE_START;
        constr.fill = GridBagConstraints.HORIZONTAL;
        
        panel.add( statusStart, constr );
        
        this.statusEnd = new JLabel( " ", JLabel.TRAILING );
        statusEnd.setFont(new Font(fontname, Font.PLAIN, fontsize));
        
        constr.gridwidth = 1; constr.gridheight = 1;
        constr.gridx = 1; constr.gridy = 0;
        constr.weightx = 1; constr.weighty = 0;
        constr.anchor = GridBagConstraints.FIRST_LINE_END;
        constr.fill = GridBagConstraints.HORIZONTAL;
        
        panel.add( statusEnd, constr );
        
        this.text = new JTextArea();
        text.setRows(rows);
        text.setColumns(cols);
        text.setFont(new Font(fontname, Font.PLAIN, fontsize));
        text.setEditable(false);
        text.addKeyListener( new SwingShellConsole.keyHandler() );
        text.setWrapStyleWord(true);
        text.setLineWrap(true);
        text.getCaret().setVisible(true);
        
        JScrollPane stsp = new JScrollPane();
        stsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        stsp.getViewport().add(text);
        stsp.getViewport().setScrollMode(JViewport.BLIT_SCROLL_MODE);
        
        constr.gridwidth = 2; constr.gridheight = 1;
        constr.gridx = 0; constr.gridy = 1;
        constr.weightx = 1; constr.weighty = 1;
        constr.anchor = GridBagConstraints.LAST_LINE_END;
        constr.fill = GridBagConstraints.BOTH;
        
        panel.add( stsp, constr );
        
        if( null != frame ) {
            // Offset the frames
            frame.setLocation( (fontsize * 4), (fontsize * 4) );
            frame.pack();
            frame.setVisible(true);
        }
        
        text.requestFocus();
    }
    
    /**