1 /*
   2  * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.awt.X11;
  27 
  28 
  29 import sun.awt.UNIXToolkit;
  30 
  31 import java.io.File;
  32 import java.io.IOException;
  33 import java.net.MalformedURLException;
  34 import java.net.URI;
  35 
  36 import java.awt.Desktop.Action;
  37 import java.awt.peer.DesktopPeer;
  38 import java.util.ArrayList;
  39 import java.util.Arrays;
  40 import java.util.List;
  41 
  42 
  43 /**
  44  * Concrete implementation of the interface <code>DesktopPeer</code> for
  45  * the Gnome desktop on Linux and Unix platforms.
  46  *
  47  * @see DesktopPeer
  48  */
  49 public class XDesktopPeer implements DesktopPeer {
  50 
  51     // supportedActions may be changed from native within an init() call
  52     private static final List<Action> supportedActions
  53             = new ArrayList<>(Arrays.asList(Action.OPEN, Action.MAIL, Action.BROWSE));
  54 
  55     private static boolean nativeLibraryLoaded = false;
  56     private static boolean initExecuted = false;
  57 
  58     private static void initWithLock(){
  59         XToolkit.awtLock();
  60         try {
  61             if (!initExecuted) {
  62                 nativeLibraryLoaded = init(UNIXToolkit.getEnabledGtkVersion()
  63                         .ordinal(), UNIXToolkit.isGtkVerbose());
  64             }
  65         } finally {
  66             initExecuted = true;
  67             XToolkit.awtUnlock();
  68         }
  69     }
  70 
  71     //package-private
  72     XDesktopPeer(){
  73         initWithLock();
  74     }
  75 
  76     static boolean isDesktopSupported() {
  77         initWithLock();
  78         return nativeLibraryLoaded && !supportedActions.isEmpty();
  79     }
  80 
  81     public boolean isSupported(Action type) {
  82         return supportedActions.contains(type);
  83     }
  84 
  85     public void open(File file) throws IOException {
  86         try {
  87             launch(file.toURI());
  88         } catch (MalformedURLException e) {
  89             throw new IOException(file.toString());
  90         }
  91     }
  92 
  93     public void edit(File file) throws IOException {
  94         throw new UnsupportedOperationException("The current platform " +
  95             "doesn't support the EDIT action.");
  96     }
  97 
  98     public void print(File file) throws IOException {
  99         throw new UnsupportedOperationException("The current platform " +
 100             "doesn't support the PRINT action.");
 101     }
 102 
 103     public void mail(URI uri) throws IOException {
 104         launch(uri);
 105     }
 106 
 107     public void browse(URI uri) throws IOException {
 108         launch(uri);
 109     }
 110 
 111     private void launch(URI uri) throws IOException {
 112         byte[] uriByteArray = ( uri.toString() + '\0' ).getBytes();
 113         boolean result = false;
 114         XToolkit.awtLock();
 115         try {
 116             if (!nativeLibraryLoaded) {
 117                 throw new IOException("Failed to load native libraries.");
 118             }
 119             result = gnome_url_show(uriByteArray);
 120         } finally {
 121             XToolkit.awtUnlock();
 122         }
 123         if (!result) {
 124             throw new IOException("Failed to show URI:" + uri);
 125         }
 126     }
 127 
 128     private native boolean gnome_url_show(byte[] url);
 129     private static native boolean init(int gtkVersion, boolean verbose);
 130 }