/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.felix.shell.gui.plugin;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.io.PrintStream;
import javax.swing.JPanel;
import javax.swing.JTextField;
import org.apache.felix.shell.ShellService;
import org.apache.felix.shell.gui.Plugin;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
public class ShellPlugin extends JPanel implements Plugin
{
private BundleContext m_context = null;
private PrintStream m_out = null;
private JTextField m_commandField = new JTextField();
private String[] m_history = new String[25];
private int m_historyCount = -1;
private int m_current = 0; // current history counter
private ScrollableOutputArea m_soa = new ScrollableOutputArea();
// Plugin interface methods.
public String getName()
{
return "Shell";
}
public Component getGUI()
{
return this;
}
// Implementation.
public ShellPlugin(BundleContext context)
{
m_context = context;
m_out = new PrintStream(new OutputAreaStream(m_soa));
initialize();
}
private void initialize()
{
setLayout(new BorderLayout());
m_commandField.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent event)
{
commandFieldKeyPressed(event);
}
});
m_commandField.setFont(new java.awt.Font("Monospaced", 0, 12));
add(m_commandField, BorderLayout.SOUTH);
add(m_soa, BorderLayout.CENTER);
}
void processCommand(String line)
{
if (line == null)
{
return;
}
line = line.trim();
if (line.length() == 0)
{
return;
}
// Get shell service.
ServiceReference ref = m_context.getServiceReference(
org.apache.felix.shell.ShellService.class.getName());
if (ref == null)
{
m_out.println("No shell service is available.");
return;
}
ShellService shell = (ShellService) m_context.getService(ref);
// Print the command line in the output window.
m_out.println("-> " + line);
try {
shell.executeCommand(line, m_out, m_out);
} catch (Exception ex) {
m_out.println(ex.toString());
ex.printStackTrace(m_out);
}
m_context.ungetService(ref);
}
private void addToHistory(String command)
{
m_historyCount++;
if (m_historyCount >= m_history.length)
{
m_historyCount = m_history.length - 1;
for (int i = 0; i < m_history.length - 1; i++)
{
m_history[i] = m_history[i + 1];
}
}
m_history[m_historyCount] = new String(command);
}
private String getFromHistory(int num)
{
if (num < 0)
{
return ("");
}
else if (num > m_historyCount)
{
return("");
}
return m_history[num];
}
protected void commandFieldKeyPressed(KeyEvent event)
{
String command = null;
int c = event.getKeyCode();
// Cursor up.
if (c == 38)
{
m_current--;
if (m_current < 0)
{
m_current = 0;
}
m_commandField.setText(getFromHistory(m_current));
m_commandField.setCaretPosition(m_commandField.getText().length());
}
// Cursor down.
else if (c == 40)
{
m_current++;
if (m_current > m_historyCount)
{
m_current = m_historyCount + 1;
}
m_commandField.setText(getFromHistory(m_current));
m_commandField.setCaretPosition(m_commandField.getText().length());
}
else if (c == 10)
{
command = m_commandField.getText();
if (!command.equals(""))
{
addToHistory(command);
m_current = m_historyCount + 1;
processCommand(command);
}
m_commandField.setText("");
}
}
}