org.jopendocument.util.DesktopEnvironment Maven / Gradle / Ivy
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2008 jOpenDocument, by ILM Informatique. All rights reserved.
*
* The contents of this file are subject to the terms of the GNU
* General Public License Version 3 only ("GPL").
* You may not use this file except in compliance with the License.
* You can obtain a copy of the License at http://www.gnu.org/licenses/gpl-3.0.html
* See the License for the specific language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each file.
*
*/
package org.jopendocument.util;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.filechooser.FileSystemView;
/**
* A desktop environment like Gnome or MacOS.
*
* @author Sylvain CUAZ
* @see #getDE()
*/
public abstract class DesktopEnvironment {
static public final class Gnome extends DesktopEnvironment {
@Override
protected String findVersion() {
try {
// e.g. GNOME gnome-about 2.24.1
final String line = cmdSubstitution(Runtime.getRuntime().exec(new String[] { "gnome-about", "--version" }));
final String[] words = line.split(" ");
return words[words.length - 1];
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}
static public final class KDE extends DesktopEnvironment {
private static final Pattern versionPattern = Pattern.compile("^KDE: (.*)$", Pattern.MULTILINE);
@Override
protected String findVersion() {
try {
// Qt: 3.3.8b
// KDE: 3.5.10
// kde-config: 1.0
final String line = cmdSubstitution(Runtime.getRuntime().exec(new String[] { "kde-config", "--version" }));
final Matcher matcher = versionPattern.matcher(line);
matcher.find();
return matcher.group(1);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}
static public final class XFCE extends DesktopEnvironment {
@Override
protected String findVersion() {
// TODO
return "";
}
}
static public final class Unknown extends DesktopEnvironment {
@Override
protected String findVersion() {
return "";
}
}
static private class DEisOS extends DesktopEnvironment {
@Override
protected String findVersion() {
return System.getProperty("os.version");
}
}
static public final class Windows extends DEisOS {
static private boolean needsQuoting(String s) {
final int len = s.length();
if (len == 0) // empty string have to be quoted
return true;
for (int i = 0; i < len; i++) {
switch (s.charAt(i)) {
case ' ':
case '\t':
case '\\':
case '"':
return true;
}
}
return false;
}
@Override
// see http://bugs.sun.com/view_bug.do?bug_id=6468220
public String quoteParamForExec(final String s) {
if (!needsQuoting(s))
return s;
return StringUtils.doubleQuote(s);
}
}
static public final class Mac extends DEisOS {
// From CarbonCore/Folders.h
private static final String kDocumentsDirectory = "docs";
private static final String kPreferencesDirectory = "pref";
private static Class FileManagerClass;
private static Short kUserDomain;
private static Method OSTypeToInt;
private static Class getFileManagerClass() {
if (FileManagerClass == null) {
try {
FileManagerClass = Class.forName("com.apple.eio.FileManager");
OSTypeToInt = FileManagerClass.getMethod("OSTypeToInt", String.class);
kUserDomain = (Short) FileManagerClass.getField("kUserDomain").get(null);
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new IllegalStateException(e);
}
}
return FileManagerClass;
}
@Override
public File getDocumentsFolder() {
return getFolder(kDocumentsDirectory);
}
@Override
public File getPreferencesFolder(String appName) {
return new File(getFolder(kPreferencesDirectory), appName);
}
public File getFolder(String type) {
try {
final Method findFolder = getFileManagerClass().getMethod("findFolder", Short.TYPE, Integer.TYPE);
final String path = (String) findFolder.invoke(null, kUserDomain, OSTypeToInt.invoke(null, type));
return new File(path);
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new IllegalStateException(e);
}
}
}
/**
* Execute the passed command and test its return code.
*
* @param command the command to {@link Runtime#exec(String[]) execute}.
* @return false if the {@link Process#waitFor() return code} is not 0 or an
* exception is thrown.
* @throws RTInterruptedException if this is interrupted while waiting.
*/
public static final boolean test(final String... command) throws RTInterruptedException {
try {
return Runtime.getRuntime().exec(command).waitFor() == 0;
} catch (InterruptedException e) {
throw new RTInterruptedException(e);
} catch (IOException e) {
Log.get().finer(e.getLocalizedMessage());
return false;
}
}
public final static String cmdSubstitution(Process p) throws IOException {
final ByteArrayOutputStream out = new ByteArrayOutputStream(100 * 1024);
StreamUtils.copy(p.getInputStream(), out);
return out.toString();
}
private static final DesktopEnvironment detectDE() {
final String os = System.getProperty("os.name");
if (os.startsWith("Windows")) {
return new Windows();
} else if (os.startsWith("Mac OS")) {
return new Mac();
} else if (os.startsWith("Linux")) {
// from redhat xdg-utils 1.0.2-14.20091016cvs
if ("true".equalsIgnoreCase(System.getenv("KDE_FULL_SESSION")))
return new KDE();
else if (System.getenv("GNOME_DESKTOP_SESSION_ID") != null)
return new Gnome();
// the above variable is deprecated, the line below only works for newer gnome
else if (test("dbus-send", "--print-reply", "--dest=org.freedesktop.DBus", "/org/freedesktop/DBus", "org.freedesktop.DBus.GetNameOwner", "string:org.gnome.SessionManager"))
return new Gnome();
else {
try {
final String saveMode = cmdSubstitution(Runtime.getRuntime().exec(new String[] { "xprop", "-root", "_DT_SAVE_MODE" }));
if (saveMode.endsWith(" = \"xfce4\""))
return new XFCE();
} catch (IOException e) {
Log.get().fine(e.getLocalizedMessage());
}
}
}
return new Unknown();
}
private static DesktopEnvironment DE = null;
public static final DesktopEnvironment getDE() {
if (DE == null) {
DE = detectDE();
}
return DE;
}
public static final void resetDE() {
DE = null;
}
private String version;
private DesktopEnvironment() {
this.version = null;
}
protected abstract String findVersion();
public final String getVersion() {
if (this.version == null)
this.version = this.findVersion();
return this.version;
}
public File getDocumentsFolder() {
return FileSystemView.getFileSystemView().getDefaultDirectory();
}
public File getPreferencesFolder(final String appName) {
return new File(System.getProperty("user.home"), "." + appName);
}
// on some systems arguments are not passed correctly by ProcessBuilder
public String quoteParamForExec(String s) {
return s;
}
@Override
public String toString() {
return "DesktopEnvironment " + this.getClass().getSimpleName();
}
public static void main(String[] args) {
System.out.println(getDE() + " version " + getDE().getVersion());
}
}
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