ShellComponent.java :  » Rule-Engine » zilonis » org » zilonis » tool » ui » shell » Java Open Source

package org.zilonis.tool.ui.shell;

import java.awt.BorderLayout;
import java.awt.Font;
import java.io.DataInputStream;
import java.io.PrintStream;

import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

import org.zilonis.tool.ext.aerith.ui.AerithScrollbarUI;

public class ShellComponent extends JPanel implements Runnable {

  private JScrollPane scrollPanel;
  
  private Plugin plugin;

  private DataInputStream stdin;

  private PrintStream stdout;

  private PrintStream stderr;

  private Thread linkingThread = null;

  protected JLabel statusLabel = new JLabel();

  private final InterpreterTextArea interpreterTextArea;

  public ShellComponent(Plugin plugin) {
    if (null == plugin)
      throw new IllegalArgumentException("Require interpreter.");
    this.plugin = plugin;
    interpreterTextArea = new InterpreterTextArea();
    stdin = interpreterTextArea.getInputStreamFromUI();
    stdout = interpreterTextArea.getOutputStreamToUI();
    stderr = interpreterTextArea.getErrorConsole();
    initComponents();
    scrollPanel.getVerticalScrollBar().setUI(new AerithScrollbarUI());
    scrollPanel.getHorizontalScrollBar().setUI(new AerithScrollbarUI());
    scrollPanel.setBorder(javax.swing.BorderFactory.createEmptyBorder(1, 1, 6,
        1));
    scrollPanel
        .setHorizontalScrollBarPolicy(javax.swing.ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
    scrollPanel
        .setVerticalScrollBarPolicy(javax.swing.ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
    
  }
  
  public void initComponents() {
    setLayout(new BorderLayout());
    scrollPanel = new JScrollPane(interpreterTextArea);
    add(scrollPanel, BorderLayout.CENTER);
    statusLabel.setFont(new Font("SansSerif", Font.PLAIN, 10));
    add(statusLabel, BorderLayout.SOUTH);
  }

  public String getPluginVersion() {

    return plugin.userVersion();
  }

  /**
   * Send the argument statement to be evaluated in the interpreter.
   */
  /*public void println(String statement) throws IOException {
    if (statement != null)
      interpreterTextArea.println(statement);
  }*/

  /**
   * Run the interpreter.
   */
  public void run() {

    statusReset();

    while (true) {
      try {
        plugin.console(stdin, stdout, stderr);
        statusReset();
      } catch (Exception exc) {
        if (!plugin.exception(exc, stdout, stderr))
          return;
      }
    }
  }

  /**
   * Get status label text.
   */
  public String getStatus() {
    return statusLabel.getText();
  }

  /**
   * Set status label text.
   */
  public void setStatus(String msg) {
    statusLabel.setText(msg);
  }

  /**
   * Set status label to interp user version string.
   */
  public void statusReset() {
    statusLabel.setText(plugin.userVersion());
  }

  /**
   * Create and start thread for this shell.
   */
  public void start() {

    if (linkingThread == null) {
      linkingThread = new Thread(this);
      linkingThread.start();
    }
  }

  public void stop() {

    if (linkingThread != null) {

      linkingThread.stop();

      linkingThread = null;
    }
  }
}