/*
 * JAVA PRESS Vol.5
 * "Scripting with ECMAScript" example (List 1/ English Version)
 * Written by Summery Sardine <sardine@toyfish.net>
 */

import FESI.jslib.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;

class ScriptableEditor extends Frame implements ActionListener {
	TextArea text;
	Label status;
	JSGlobalObject global;
	
	ScriptableEditor() {
		super("ScriptableEditor");
		setSize(500, 300);
		
		// build UI
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
		MenuBar menuBar = new MenuBar();
		Menu menu = menuBar.add(new Menu("File"));
		MenuItem item = menu.add(new MenuItem("Execute"));
		item.addActionListener(this);
		setMenuBar(menuBar);
		text = new TextArea();
		add(text, BorderLayout.CENTER);
		status = new Label("Welcome to ScriptableEditor!");
		add(status, BorderLayout.SOUTH);
		
		// initialize FESI interpreter
		try {
			global = JSUtil.makeEvaluator();
			Object obj = global.makeBeanWrapper(text);
			global.setMember("text", obj);
		} catch (JSException e) {
			System.err.println(e.getMessage());
			System.exit(1);
		}
	}
	
	// menu action
	public void actionPerformed(ActionEvent ae) {
		FileDialog dialog = new FileDialog(this);
		dialog.show();
		String scriptName = dialog.getDirectory();
		if (scriptName == null) return;
		else scriptName += dialog.getFile();
		Reader r = null;
		try {
			status.setText("Evaluating...");
			r = new BufferedReader(new FileReader(scriptName));
			Object result = global.eval(r, "Script:" + scriptName);
			status.setText("Completed: " + result);
		} catch (Exception e) {
			status.setText("Error: " + e.getMessage());
		}
		try {
			if (r != null) r.close();
		} catch (IOException e) {
		}
	}
	
	public static void main(String[] args) {
		ScriptableEditor editor = new ScriptableEditor();
		editor.setVisible(true);
	}
}