pcgen.gui2.tools.DesktopBrowserLauncher.java Source code

Introduction

Here is the source code for pcgen.gui2.tools.DesktopBrowserLauncher.java

Source

/*
 * Copyright 2012 Vincent Lhote
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package pcgen.gui2.tools;

import java.awt.Desktop;
import java.awt.Desktop.Action;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;

import javax.swing.JFileChooser;

import pcgen.system.PCGenSettings;

import org.apache.commons.lang3.SystemUtils;

/**
 * Provide an utility method to open files with {@link Desktop}.
 */
public final class DesktopBrowserLauncher {

    private static final Desktop DESKTOP = Desktop.getDesktop();
    private static final Boolean IS_BROWSE_SUPPORTED = Desktop.isDesktopSupported()
            && DESKTOP.isSupported(Action.BROWSE);

    private DesktopBrowserLauncher() {
    }

    /**
     * View a file (should be browsable) in a browser.
     *
     * @param file Path of the file to display in browser.
     * @throws IOException if file doesn't exist
     */
    public static void viewInBrowser(File file) throws IOException {
        viewInBrowser(file.toURI());
    }

    /**
     * View a URL in a browser
     *
     * @param url URL to display in browser.
     * @throws IOException if the URL is bad or the browser can not be launched
     */
    public static void viewInBrowser(URL url) throws IOException {
        try {
            viewInBrowser(url.toURI());
        } catch (final URISyntaxException e) {
            throw new MalformedURLException(e.getMessage());
        }
    }

    /**
     * View a URI in a browser.
     *
     * @param uri URI to display in browser.
     * @throws IOException if browser can not be launched
     */
    private static void viewInBrowser(URI uri) throws IOException {
        // Windows tends to lock up or not actually
        // display anything unless we've specified a
        // default browser, so at least make the user
        // aware that (s)he needs one. If they don't
        // pick one and it doesn't work, at least they
        // might know enough to try selecting one the
        // next time.
        if (!IS_BROWSE_SUPPORTED && SystemUtils.IS_OS_WINDOWS && (PCGenSettings.getBrowserPath() == null)) {
            selectDefaultBrowser();
        }

        DESKTOP.browse(uri);
    }

    /**
     * Sets the default browser.
     */
    public static void selectDefaultBrowser() {
        final JFileChooser fc = new JFileChooser();
        fc.setDialogTitle("Find and select your preferred html browser.");

        if (SystemUtils.IS_OS_MAC || SystemUtils.IS_OS_MAC_OSX) {
            fc.putClientProperty("JFileChooser.appBundleIsTraversable", "never");
        }

        if (PCGenSettings.getBrowserPath() != null) {
            fc.setCurrentDirectory(new File(PCGenSettings.getBrowserPath()));
        }

        final int returnVal = fc.showOpenDialog(null);

        if (returnVal == JFileChooser.APPROVE_OPTION) {
            final File file = fc.getSelectedFile();
            PCGenSettings.OPTIONS_CONTEXT.setProperty(PCGenSettings.BROWSER_PATH, file.getAbsolutePath());
        }
    }
}