1 files changed, 213 insertions, 0 deletions
diff --git a/netx/net/sourceforge/jnlp/util/XDesktopEntry.java b/netx/net/sourceforge/jnlp/util/XDesktopEntry.java
new file mode 100644
index 0000000..8527fed
--- /dev/null
+++ b/netx/net/sourceforge/jnlp/util/XDesktopEntry.java
@@ -0,0 +1,213 @@
+// 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.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.png";
+
+    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";
+        File cacheFile = CacheUtil.urlToPath(file.getSourceLocation(), "cache");
+
+        String fileContents = "[Desktop Entry]\n";
+        fileContents += "Version=1.0\n";
+        fileContents += "Name=" + file.getTitle() + "\n";
+        fileContents += "GenericName=Java Web Start Application\n";
+        fileContents += "Comment=" + 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=" + file.getInformation().getVendor() + "\n";
+        }
+
+        //Shortcut executes the jnlp from cache and system preferred java..
+        fileContents += "Exec=" + "javaws" + " \"" + cacheFile.getAbsolutePath() + "\"\n";
+
+        return new StringReader(fileContents);
+
+    }
+
+    /**
+     * 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.TMP_DIR + File.separator
+                + FileUtils.sanitizeFileName(file.getTitle()) + ".desktop");
+        try {
+
+            /*
+             * 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);
+            }
+        }
+    }
+
+}