/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package org.autoplot.help;

import java.lang.reflect.Method;
import javax.swing.JOptionPane;

/**
 *
 * @author jbf
 */
public class Util {

    /**
     * support restricted security environment by checking permissions before
     * checking property.
     * @param name
     * @param deft
     * @return
     */
    public static String getProperty(String name, String deft) {
        try {
            return System.getProperty(name, deft);
        } catch (SecurityException ex) {
            return deft;
        }
    }

    /**
     * open the URL in a browser.   Borrowed from http://www.centerkey.com/java/browser/.
     */
    public static void openBrowser(String url) {
        final String errMsg = "Error attempting to launch web browser";
        String osName = Util.getProperty("os.name", "applet");
        try {
            if (osName.startsWith("Mac OS")) {
                Class fileMgr = Class.forName("com.apple.eio.FileManager");
                Method openURL = fileMgr.getDeclaredMethod("openURL", new Class[]{String.class});
                openURL.invoke(null, new Object[]{url});
            } else if (osName.startsWith("Windows")) {
                Runtime.getRuntime().exec("rundll32 url.dll,FileProtocolHandler " + url);
            } else if (osName.equals("applet")) {
                throw new RuntimeException("applets can't start browser yet");
                //TODO: this shouldn't be difficult, just get the AppletContext.
            } else { //assume Unix or Linux
                String[] browsers = {"firefox", "opera", "konqueror", "epiphany", "mozilla", "netscape"};
                String browser = null;
                for (int count = 0; count < browsers.length && browser == null; count++) {
                    if (Runtime.getRuntime().exec(new String[]{"which", browsers[count]}).waitFor() == 0) {
                        browser = browsers[count];
                    }
                }
                if (browser == null) {
                    throw new Exception("Could not find web browser");
                } else {
                    Runtime.getRuntime().exec(new String[]{browser, url});
                }
            }
        } catch (Exception e) {
            JOptionPane.showMessageDialog(null, errMsg + ":\n" + e.getLocalizedMessage());
        }
    }


}