package com.centerkey.utils;

import java.lang.reflect.Method;

import javax.swing.JOptionPane;

/**
 * Bare Bones Browser Launch for Java<br>
 * Utility class to open a web page from a Swing application
 * in the user's default browser.<br>
 * Supports: Mac OS X, GNU/Linux, Unix, Windows XP<br>
 * Example Usage:<code><br> &nbsp; &nbsp;
 *    String url = "http://www.google.com/";<br> &nbsp; &nbsp;
 *    BareBonesBrowserLaunch.openURL(url);<br></code>
 * Latest Version: <a href="http://www.centerkey.com/java/browser/">http://www.centerkey.com/java/browser</a><br>
 * Author: Dem Pilafian<br>
 * Public Domain Software -- Free to Use as You Like
 * @version 1.5, December 10, 2005
 */

public class BareBonesBrowserLaunch{

	private static final String errMsg = "Error attempting to launch web browser";

	/**
	 * Opens the specified web page in a web browser
	 * @param url  An absolute URL of a web page (ex: "http://www.google.com/")
	 */
	public static void openURL(String url){
		String osName = System.getProperty("os.name");
		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 { //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());
		}
	}

}
