Application: gvSIG desktop

/*

 * Created on 18-oct-2004

 *

 * TODO To change the template for this generated file go to

 * Window - Preferences - Java - Code Generation - Code and Comments

 */

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package com.iver.cit.gvsig.gui.panels;

/**

 * @author Steven Spencer

 *

 * TODO To change the template for this generated type comment go to

 * Window - Preferences - Java - Code Generation - Code and Comments

 */

import java.io.IOException;

/**

* A simple, static class to display a URL in the system browser.

*

* Under Unix, the system browser is hard-coded to be 'netscape'.

* Netscape must be in your PATH for this to work.  This has been

* tested with the following platforms: AIX, HP-UX and Solaris.

*

* Under Windows, this will bring up the default browser under windows,

* usually either Netscape or Microsoft IE.  The default browser is

* determined by the OS.  This has been tested under Windows 95/98/NT.

*

* Examples:

* 

BrowserControl.displayURL("http://www.javaworld.com")

* 

BrowserControl.displayURL("file://c:\\docs\\index.html")

* 

BrowserContorl.displayURL("file:///user/joe/index.html");

* 

* Note - you must include the url type -- either "http://" or

* "file://".

*/

public class BrowserControl

{

    /**

     * Display a file in the system browser.  If you want to display a

     * file, you must include the absolute path name.

     *

     * @param url the file's url (the url must start with either "http://"

or

     * "file://").

     */

    public static void displayURL(String url)

    {

        boolean windows = isWindowsPlatform();

        String cmd = null;

        try

        {

            if (windows)

            {

                // cmd = 'rundll32 url.dll,FileProtocolHandler http://...'

                cmd = WIN_PATH + " " + WIN_FLAG + " " + url;

                Process p = Runtime.getRuntime().exec(cmd);

            }

            else

            {

                // Under Unix, Netscape has to be running for the "-remote"

                // command to work.  So, we try sending the command and

                // check for an exit value.  If the exit command is 0,

                // it worked, otherwise we need to start the browser.

                // cmd = 'netscape -remote openURL(http://www.javaworld.com)'

                cmd = UNIX_PATH + " " + UNIX_FLAG + "(" + url + ")";

                Process p = Runtime.getRuntime().exec(cmd);

                try

                {

                    // wait for exit code -- if it's 0, command worked,

                    // otherwise we need to start the browser up.

                    int exitCode = p.waitFor();

                    if (exitCode != 0)

                    {

                        // Command failed, start up the browser

                        // cmd = 'netscape http://www.javaworld.com'

                        cmd = UNIX_PATH + " "  + url;

                        p = Runtime.getRuntime().exec(cmd);

                    }

                }

                catch(InterruptedException x)

                {

                    System.err.println("Error bringing up browser, cmd='" +

                                       cmd + "'");

                    System.err.println("Caught: " + x);

                }

            }

        }

        catch(IOException x)

        {

            // couldn't exec browser

            System.err.println("Could not invoke browser, command=" + cmd);

            System.err.println("Caught: " + x);

        }

    }

    /**

     * Try to determine whether this application is running under Windows

     * or some other platform by examing the "os.name" property.

     *

     * @return true if this application is running under a Windows OS

     */

    public static boolean isWindowsPlatform()

    {

        String os = System.getProperty("os.name");

        if ( os != null && os.startsWith(WIN_ID))

            return true;

        else

            return false;

    }

    // Used to identify the windows platform.

    private static final String WIN_ID = "Windows";

    // The default system browser under windows.

    private static final String WIN_PATH = "rundll32";

    // The flag to display a url.

    private static final String WIN_FLAG = "url.dll,FileProtocolHandler";

    // The default browser under unix.

    private static final String UNIX_PATH = "netscape";

    // The flag to display a url.

    private static final String UNIX_FLAG = "-remote openURL";

}