1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
// Copyright (C) 2009 Red Hat, Inc.
//
// 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 net.sourceforge.jnlp.util;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.StringReader;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Arrays;
import net.sourceforge.jnlp.IconDesc;
import net.sourceforge.jnlp.JNLPFile;
import net.sourceforge.jnlp.StreamEater;
import net.sourceforge.jnlp.cache.CacheUtil;
import net.sourceforge.jnlp.cache.UpdatePolicy;
import net.sourceforge.jnlp.runtime.DeploymentConfiguration;
import net.sourceforge.jnlp.runtime.JNLPRuntime;
/**
* This class builds a (freedesktop.org) desktop entry out of a {@link JNLPFile}
* . This entry can be used to install desktop shortcuts. See xdg-desktop-icon
* (1) and http://standards.freedesktop.org/desktop-entry-spec/latest/ for more
* information
*
* @author Omair Majid
*
*/
public class XDesktopEntry {
public static final String JAVA_ICON_NAME = "java";
private JNLPFile file = null;
private int iconSize = -1;
private String iconLocation = null;
private int[] VALID_ICON_SIZES = new int[] { 16, 22, 32, 48, 64, 128 };
/**
* Create a XDesktopEntry for the given JNLP file
*
* @param file a {@link JNLPFile} that indicates the application to launch
*/
public XDesktopEntry(JNLPFile file) {
this.file = file;
/* looks like a good initial value */
iconSize = VALID_ICON_SIZES[2];
}
/**
* Returns the contents of the {@link XDesktopEntry} through the
* {@link Reader} interface.
*/
public Reader getContentsAsReader() {
String pathToJavaws = System.getProperty("java.home") + File.separator + "bin"
+ File.separator + "javaws";
String cacheDir = JNLPRuntime.getConfiguration()
.getProperty(DeploymentConfiguration.KEY_USER_CACHE_DIR);
File cacheFile = CacheUtil.urlToPath(file.getSourceLocation(), cacheDir);
String fileContents = "[Desktop Entry]\n";
fileContents += "Version=1.0\n";
fileContents += "Name=" + sanitize(file.getTitle()) + "\n";
fileContents += "GenericName=Java Web Start Application\n";
fileContents += "Comment=" + sanitize(file.getInformation().getDescription()) + "\n";
fileContents += "Type=Application\n";
if (iconLocation != null) {
fileContents += "Icon=" + iconLocation + "\n";
} else {
fileContents += "Icon=" + JAVA_ICON_NAME + "\n";
}
if (file.getInformation().getVendor() != null) {
fileContents += "Vendor=" + sanitize(file.getInformation().getVendor()) + "\n";
}
//Shortcut executes the jnlp from cache and system preferred java..
fileContents += "Exec=" + "javaws" + " \"" + cacheFile.getAbsolutePath() + "\"\n";
return new StringReader(fileContents);
}
/**
* Sanitizes a string so that it can be used safely in a key=value pair in a
* desktop entry file.
*
* @param input a String to sanitize
* @return a string safe to use as either the key or the value in the
* key=value pair in a desktop entry file
*/
private static String sanitize(String input) {
if (input == null) {
return "";
}
/* key=value pairs must be a single line */
return input.split("\n")[0];
}
/**
* Get the size of the icon (in pixels) for the desktop shortcut
*/
public int getIconSize() {
return iconSize;
}
/**
* Set the icon size to use for the desktop shortcut
*
* @param size the size (in pixels) of the icon to use. Commonly used sizes
* are of 16, 22, 32, 48, 64 and 128
*/
public void setIconSize(int size) {
iconSize = size;
}
/**
* Create a desktop shortcut for this desktop entry
*/
public void createDesktopShortcut() {
try {
cacheIcon();
installDesktopLauncher();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Install this XDesktopEntry into the user's desktop as a launcher
*/
private void installDesktopLauncher() {
File shortcutFile = new File(JNLPRuntime.getConfiguration()
.getProperty(DeploymentConfiguration.KEY_USER_TMP_DIR)
+ File.separator + FileUtils.sanitizeFileName(file.getTitle()) + ".desktop");
try {
if (!shortcutFile.getParentFile().isDirectory() && !shortcutFile.getParentFile().mkdirs()) {
throw new IOException(shortcutFile.getParentFile().toString());
}
FileUtils.createRestrictedFile(shortcutFile, true);
/*
* Write out a Java String (UTF-16) as a UTF-8 file
*/
OutputStreamWriter writer = new OutputStreamWriter(new FileOutputStream(shortcutFile),
Charset.forName("UTF-8"));
Reader reader = getContentsAsReader();
char[] buffer = new char[1024];
int ret = 0;
while (-1 != (ret = reader.read(buffer))) {
writer.write(buffer, 0, ret);
}
reader.close();
writer.close();
/*
* Install the desktop entry
*/
String[] execString = new String[] { "xdg-desktop-icon", "install", "--novendor",
shortcutFile.getCanonicalPath() };
if (JNLPRuntime.isDebug()) {
System.err.println("Execing: " + Arrays.toString(execString));
}
Process installer = Runtime.getRuntime().exec(execString);
new StreamEater(installer.getInputStream()).start();
new StreamEater(installer.getErrorStream()).start();
try {
installer.waitFor();
} catch (InterruptedException e) {
e.printStackTrace();
}
if (!shortcutFile.delete()) {
throw new IOException("Unable to delete temporary file:" + shortcutFile);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Cache the icon for the desktop entry
*/
private void cacheIcon() {
URL iconLocation = file.getInformation().getIconLocation(IconDesc.SHORTCUT, iconSize,
iconSize);
if (iconLocation == null) {
iconLocation = file.getInformation().getIconLocation(IconDesc.DEFAULT, iconSize,
iconSize);
}
if (iconLocation != null) {
String location = CacheUtil.getCachedResource(iconLocation, null, UpdatePolicy.SESSION)
.toString();
if (!location.startsWith("file:")) {
throw new RuntimeException("Unable to cache icon");
}
this.iconLocation = location.substring("file:".length());
if (JNLPRuntime.isDebug()) {
System.err.println("Cached desktop shortcut icon: " + this.iconLocation);
}
}
}
}
|
