/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

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

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package sun.awt.X11;

import java.io.File;

import java.io.IOException;

import java.net.MalformedURLException;

import java.net.URI;

import java.awt.Desktop.Action;

import java.awt.peer.DesktopPeer;

/**

 * Concrete implementation of the interface <code>DesktopPeer</code> for

 * the Gnome desktop on Linux and Unix platforms.

 *

 * @see DesktopPeer

 */

public class XDesktopPeer implements DesktopPeer {

    private static boolean nativeLibraryLoaded = false;

    private static boolean initExecuted = false;

    private static void initWithLock(){

        XToolkit.awtLock();

        try {

            if (!initExecuted) {

                nativeLibraryLoaded = init();

            }

        } finally {

            initExecuted = true;

            XToolkit.awtUnlock();

        }

    }

    //package-private

    XDesktopPeer(){

        initWithLock();

    }

    static boolean isDesktopSupported() {

        initWithLock();

        return nativeLibraryLoaded;

    }

    public boolean isSupported(Action type) {

        return type != Action.PRINT && type != Action.EDIT;

    }

    public void open(File file) throws IOException {

        try {

            launch(file.toURI());

        } catch (MalformedURLException e) {

            throw new IOException(file.toString());

        }

    }

    public void edit(File file) throws IOException {

        throw new UnsupportedOperationException("The current platform " +

            "doesn't support the EDIT action.");

    }

    public void print(File file) throws IOException {

        throw new UnsupportedOperationException("The current platform " +

            "doesn't support the PRINT action.");

    }

    public void mail(URI uri) throws IOException {

        launch(uri);

    }

    public void browse(URI uri) throws IOException {

        launch(uri);

    }

    private void launch(URI uri) throws IOException {

        byte[] uriByteArray = ( uri.toString() + '\0' ).getBytes();

        boolean result = false;

        XToolkit.awtLock();

        try {

            if (!nativeLibraryLoaded) {

                throw new IOException("Failed to load native libraries.");

            }

            result = gnome_url_show(uriByteArray);

        } finally {

            XToolkit.awtUnlock();

        }

        if (!result) {

            throw new IOException("Failed to show URI:" + uri);

        }

    }

    private native boolean gnome_url_show(byte[] url);

    private static native boolean init();

}