1 /*
   2  * Copyright (c) 2005, 2018, 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 import sun.awt.UNIXToolkit;
  29 
  30 import java.io.File;
  31 import java.io.IOException;
  32 import java.net.MalformedURLException;
  33 import java.net.URI;
  34 
  35 import java.awt.Desktop.Action;
  36 import java.awt.peer.DesktopPeer;
  37 import java.util.ArrayList;
  38 import java.util.Arrays;
  39 import java.util.List;
  40 
  41 
  42 /**
  43  * Concrete implementation of the interface <code>DesktopPeer</code> for
  44  * the Gnome desktop on Linux and Unix platforms.
  45  *
  46  * @see DesktopPeer
  47  */
  48 public class XDesktopPeer implements DesktopPeer {
  49 
  50     // supportedActions may be changed from native within an init() call
  51     private static final List<Action> supportedActions
  52             = new ArrayList<>(Arrays.asList(Action.OPEN, Action.MAIL, Action.BROWSE));
  53 
  54     private static boolean nativeLibraryLoaded = false;
  55     private static boolean initExecuted = false;
  56 
  57     private static void initWithLock(){
  58         XToolkit.awtLock();
  59         try {
  60             if (!initExecuted) {
  61                 nativeLibraryLoaded = init(UNIXToolkit.getEnabledGtkVersion()
  62                         .getNumber(), UNIXToolkit.isGtkVerbose());
  63             }
  64         } finally {
  65             initExecuted = true;
  66             XToolkit.awtUnlock();
  67         }
  68     }
  69 
  70     //package-private
  71     XDesktopPeer(){
  72         initWithLock();
  73     }
  74 
  75     static boolean isDesktopSupported() {
  76         initWithLock();
  77         return nativeLibraryLoaded && !supportedActions.isEmpty();
  78     }
  79 
  80     public boolean isSupported(Action type) {
  81         return supportedActions.contains(type);
  82     }
  83 
  84     public void open(File file) throws IOException {
  85         try {
  86             launch(file.toURI());
  87         } catch (MalformedURLException e) {
  88             throw new IOException(file.toString());
  89         }
  90     }
  91 
  92     public void edit(File file) throws IOException {
  93         throw new UnsupportedOperationException("The current platform " +
  94             "doesn't support the EDIT action.");
  95     }
  96 
  97     public void print(File file) throws IOException {
  98         throw new UnsupportedOperationException("The current platform " +
  99             "doesn't support the PRINT action.");
 100     }
 101 
 102     public void mail(URI uri) throws IOException {
 103         launch(uri);
 104     }
 105 
 106     public void browse(URI uri) throws IOException {
 107         launch(uri);
 108     }
 109 
 110     private void launch(URI uri) throws IOException {
 111         byte[] uriByteArray = ( uri.toString() + '\0' ).getBytes();
 112         boolean result = false;
 113         XToolkit.awtLock();
 114         try {
 115             if (!nativeLibraryLoaded) {
 116                 throw new IOException("Failed to load native libraries.");
 117             }
 118             result = gnome_url_show(uriByteArray);
 119         } finally {
 120             XToolkit.awtUnlock();
 121         }
 122         if (!result) {
 123             throw new IOException("Failed to show URI:" + uri);
 124         }
 125     }
 126 
 127     private native boolean gnome_url_show(byte[] url);
 128     private static native boolean init(int gtkVersion, boolean verbose);
 129 }