/*
 
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
 
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 
*
 
* This code is free software; you can redistribute it and/or modify it
 
* under the terms of the GNU General Public License version 2 only, as
 
* published by the Free Software Foundation.
  
Oracle designates this
 
* particular file as subject to the "Classpath" exception as provided
 
* by Oracle in the LICENSE file that accompanied this code.
 
*
 
* This code 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 General Public License
 
* version 2 for more details (a copy is included in the LICENSE file that
 
* accompanied this code).
 
*
 
* You should have received a copy of the GNU General Public License version
 
* 2 along with this work; if not, write to the Free Software Foundation,
 
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 
*
 
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 
* or visit www.oracle.com if you need additional information or have any
 
* questions.
 
*/
package javax.swing;

import java.awt.Component;
import java.awt.Font;
import java.awt.Color;
import java.awt.Insets;
import java.awt.Dimension;
import java.awt.KeyboardFocusManager;
import java.awt.KeyEventPostProcessor;
import java.awt.Toolkit;

import java.awt.event.KeyEvent;

import java.security.AccessController;

import javax.swing.plaf.ComponentUI;
import javax.swing.border.Border;

import javax.swing.event.SwingPropertyChangeSupport;
import java.beans.PropertyChangeListener;

import java.io.Serializable;
import java.io.File;
import java.io.FileInputStream;

import java.util.ArrayList;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.Vector;
import java.util.Locale;

import sun.awt.SunToolkit;
import sun.awt.OSInfo;
import sun.security.action.GetPropertyAction;
import sun.swing.SwingUtilities2;
import java.lang.reflect.Method;
import java.util.HashMap;
import sun.awt.AppContext;
import sun.awt.AWTAccessor;


/**
 
* {@code UIManager} manages the current look and feel, the set of
 
* available look and feels, {@code PropertyChangeListeners} that
 
* are notified when the look and feel changes, look and feel defaults, and
 
* convenience methods for obtaining various default values.
 
*
 
* <h3>Specifying the look and feel</h3>
 
*
 
* The look and feel can be specified in two distinct ways: by
 
* specifying the fully qualified name of the class for the look and
 
* feel, or by creating an instance of {@code LookAndFeel} and passing
 
* it to {@code setLookAndFeel}. The following example illustrates
 
* setting the look and feel to the system look and feel:
 
* <pre>
 
*
   
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
 
* </pre>
 
* The following example illustrates setting the look and feel based on
 
* class name:
 
* <pre>
 
*
   
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
 
* </pre>
 
* Once the look and feel has been changed it is imperative to invoke
 
* {@code updateUI} on all {@code JComponents}. The method {@link
 
* SwingUtilities#updateComponentTreeUI} makes it easy to apply {@code
 
* updateUI} to a containment hierarchy. Refer to it for
 
* details. The exact behavior of not invoking {@code
 
* updateUI} after changing the look and feel is
 
* unspecified. It is very possible to receive unexpected exceptions,
 
* painting problems, or worse.
 
*
 
* <h3>Default look and feel</h3>
 
*
 
* The class used for the default look and feel is chosen in the following
 
* manner:
 
* <ol>
 
*
   
<li>If the system property <code>swing.defaultlaf</code> is
 
*
       
{@code non-null}, use its value as the default look and feel class
 
*
       
name.
 
*
   
<li>If the
 
file <code>swing.properties</code>
 
*
       
exists and contains the key <code>swing.defaultlaf</code>,
 
*
       
use its value as the default look and feel class name. The location
 
*
       
that is checked for <code>swing.properties</code> may vary depending
 
*
       
upon the implementation of the Java platform. Typically the
 
*
       
<code>swing.properties</code> file is located in the <code>lib</code>
 
*
       
subdirectory of the Java installation directory.
 
*
       
Refer to the release notes of the implementation being used for
 
*
       
further details.
 
*
   
<li>Otherwise use the cross platform look and feel.
 
* </ol>
 
*
 
* <h3>Defaults</h3>
 
*
 
* {@code UIManager} manages three sets of {@code UIDefaults}. In order, they
 
* are:
 
* <ol>
 
*
   
<li>Developer defaults. With few exceptions Swing does not
 
*
       
alter the developer defaults; these are intended to be modified
 
*
       
and used by the developer.
 
*
   
<li>Look and feel defaults. The look and feel defaults are
 
*
       
supplied by the look and feel at the time it is installed as the
 
*
       
current look and feel ({@code setLookAndFeel()} is invoked). The
 
*
       
look and feel defaults can be obtained using the {@code
 
*
       
getLookAndFeelDefaults()} method.
 
*
   
<li>System defaults. The system defaults are provided by Swing.
 
* </ol>
 
* Invoking any of the various {@code get} methods
 
* results in checking each of the defaults, in order, returning
 
* the first {@code non-null} value. For example, invoking
 
* {@code UIManager.getString("Table.foreground")} results in first
 
* checking developer defaults. If the developer defaults contain
 
* a value for {@code "Table.foreground"} it is returned, otherwise
 
* the look and feel defaults are checked, followed by the system defaults.
 
* <p>
 
* It's important to note that {@code getDefaults} returns a custom
 
* instance of {@code UIDefaults} with this resolution logic built into it.
 
* For example, {@code UIManager.getDefaults().getString("Table.foreground")}
 
* is equivalent to {@code UIManager.getString("Table.foreground")}. Both
 
* resolve using the algorithm just described. In many places the
 
* documentation uses the word defaults to refer to the custom instance
 
* of {@code UIDefaults} with the resolution logic as previously described.
 
* <p>
 
* When the look and feel is changed, {@code UIManager} alters only the
 
* look and feel defaults; the developer and system defaults are not
 
* altered by the {@code UIManager} in any way.
 
* <p>
 
* The set of defaults a particular look and feel supports is defined
 
* and documented by that look and feel. In addition, each look and
 
* feel, or {@code ComponentUI} provided by a look and feel, may
 
* access the defaults at different times in their life cycle. Some
 
* look and feels may aggressively look up defaults, so that changing a
 
* default may not have an effect after installing the look and feel.
 
* Other look and feels may lazily access defaults so that a change to
 
* the defaults may effect an existing look and feel. Finally, other look
 
* and feels might not configure themselves from the defaults table in
 
* any way. None-the-less it is usually the case that a look and feel
 
* expects certain defaults, so that in general
 
* a {@code ComponentUI} provided by one look and feel will not
 
* work with another look and feel.
 
* <p>
 
* <strong>Warning:</strong>
 
* Serialized objects of this class will not be compatible with
 
* future Swing releases. The current serialization support is
 
* appropriate for short term storage or RMI between applications running
 
* the same version of Swing.
  
As of 1.4, support for long term storage
 
* of all JavaBeans&trade;
 
* has been added to the <code>java.beans</code> package.
 
* Please see .
 
*
 
* @author Thomas Ball
 
* @author Hans Muller
 
*/

public class UIManager implements Serializable
{
    
/**
     
* This class defines the state managed by the <code>UIManager</code>.
  
For
     
* Swing applications the fields in this class could just as well
     
* be static members of <code>UIManager</code> however we give them
     
* "AppContext"
     
* scope instead so that applets (and potentially multiple lightweight
     
* applications running in a single VM) have their own state. For example,
     
* an applet can alter its look and feel, see <code>setLookAndFeel</code>.
     
* Doing so has no affect on other applets (or the browser).
     
*/

    
private static class LAFState
    
{
        
Properties swingProps;
        
private UIDefaults[] tables = new UIDefaults[2];

        
boolean initialized = false;
        
boolean focusPolicyInitialized = false;
        
MultiUIDefaults multiUIDefaults = new MultiUIDefaults(tables);
        
LookAndFeel lookAndFeel;
        
LookAndFeel multiLookAndFeel = null;
        
Vector<LookAndFeel> auxLookAndFeels = null;
        
SwingPropertyChangeSupport changeSupport;

        
LookAndFeelInfo[] installedLAFs;

        
UIDefaults getLookAndFeelDefaults() { return tables[0]; }
        
void setLookAndFeelDefaults(UIDefaults x) { tables[0] = x; }

        
UIDefaults getSystemDefaults() { return tables[1]; }
        
void setSystemDefaults(UIDefaults x) { tables[1] = x; }

        
/**
         
* Returns the SwingPropertyChangeSupport for the current
         
* AppContext.
  
If <code>create</code> is a true, a non-null
         
* <code>SwingPropertyChangeSupport</code> will be returned, if
         
* <code>create</code> is false and this has not been invoked
         
* with true, null will be returned.
         
*/

        
public synchronized SwingPropertyChangeSupport
                                 
getPropertyChangeSupport
(boolean create) {
            
if (create && changeSupport == null) {
                
changeSupport = new SwingPropertyChangeSupport(
                                         
UIManager.class);
            
}
            
return changeSupport;
        
}
    
}




    
/* Lock object used in place of class object for synchronization. (4187686)
     
*/

    
private static final Object classLock = new Object();

    
/**
     
* Return the <code>LAFState</code> object, lazily create one if necessary.
     
* All access to the <code>LAFState</code> fields is done via this method,
     
* for example:
     
* <pre>
     
*getLAFState().initialized = true;
     
* </pre>
     
*/

    
private static LAFState getLAFState() {
        
LAFState rv = (LAFState)SwingUtilities.appContextGet(
                
SwingUtilities2.LAF_STATE_KEY);
        
if (rv == null) {
            
synchronized (classLock) {
                
rv = (LAFState)SwingUtilities.appContextGet(
                        
SwingUtilities2.LAF_STATE_KEY);
                
if (rv == null) {
                    
SwingUtilities.appContextPut(
                            
SwingUtilities2.LAF_STATE_KEY,
                            
(rv = new LAFState()));
                
}
            
}
        
}
        
return rv;
    
}


    
/* Keys used in the <code>swing.properties</code> properties file.
     
* See loadUserProperties(), initialize().
     
*/


    
private static final String defaultLAFKey = "swing.defaultlaf";
    
private static final String auxiliaryLAFsKey = "swing.auxiliarylaf";
    
private static final String multiplexingLAFKey = "swing.plaf.multiplexinglaf";
    
private static final String installedLAFsKey = "swing.installedlafs";
    
private static final String disableMnemonicKey = "swing.disablenavaids";

    
/**
     
* Return a <code>swing.properties</code> file key for the attribute of specified
     
* look and feel.
  
The attr is either "name" or "class", a typical
     
* key would be: "swing.installedlaf.windows.name"
     
*/

    
private static String makeInstalledLAFKey(String laf, String attr) {
        
return "swing.installedlaf." + laf + "." + attr;
    
}

    
/**
     
* The location of the <code>swing.properties</code> property file is
     
* implementation-specific.
     
* It is typically located in the <code>lib</code> subdirectory of the Java
     
* installation directory. This method returns a bogus filename
     
* if <code>java.home</code> isn't defined.
     
*/

    
private static String makeSwingPropertiesFilename() {
        
String sep = File.separator;
        
// No need to wrap this in a doPrivileged as it's called from
        
// a doPrivileged.
        
String javaHome = System.getProperty("java.home");
        
if (javaHome == null) {
            
javaHome = "<java.home undefined>";
        
}
        
return javaHome + sep + "lib" + sep + "swing.properties";
    
}


    
/**
     
* Provides a little information about an installed
     
* <code>LookAndFeel</code> for the sake of configuring a menu or
     
* for initial application set up.
     
*
     
* @see UIManager#getInstalledLookAndFeels
     
* @see LookAndFeel
     
*/

    
public static class LookAndFeelInfo {
        
private String name;
        
private String className;

        
/**
         
* Constructs a <code>UIManager</code>s
         
* <code>LookAndFeelInfo</code> object.
         
*
         
* @param name
      
a <code>String</code> specifying the name of
         
*
                      
the look and feel
         
* @param className a <code>String</code> specifying the name of
         
*
                      
the class that implements the look and feel
         
*/

        
public LookAndFeelInfo(String name, String className) {
            
this.name = name;
            
this.className = className;
        
}

        
/**
         
* Returns the name of the look and feel in a form suitable
         
* for a menu or other presentation
         
* @return a <code>String</code> containing the name
         
* @see LookAndFeel#getName
         
*/

        
public String getName() {
            
return name;
        
}

        
/**
         
* Returns the name of the class that implements this look and feel.
         
* @return the name of the class that implements this
         
*
              
<code>LookAndFeel</code>
         
* @see LookAndFeel
         
*/

        
public String getClassName() {
            
return className;
        
}

        
/**
         
* Returns a string that displays and identifies this
         
* object's properties.
         
*
         
* @return a <code>String</code> representation of this object
         
*/

        
public String toString() {
            
return getClass().getName() + "[" + getName() + " " + getClassName() + "]";
        
}
    
}


    
/**
     
* The default value of <code>installedLAFS</code> is used when no
     
* <code>swing.properties</code>
     
* file is available or if the file doesn't contain a "swing.installedlafs"
     
* property.
     
*
     
* @see #initializeInstalledLAFs
     
*/

    
private static LookAndFeelInfo[] installedLAFs;

    
static {
        
ArrayList<LookAndFeelInfo> iLAFs = new ArrayList<LookAndFeelInfo>(4);
        
iLAFs.add(new LookAndFeelInfo(
                      
"Metal", "javax.swing.plaf.metal.MetalLookAndFeel"));
        
iLAFs.add(new LookAndFeelInfo(
                      
"Nimbus", "javax.swing.plaf.nimbus.NimbusLookAndFeel"));
        
iLAFs.add(new LookAndFeelInfo("CDE/Motif",
                  
"com.sun.java.swing.plaf.motif.MotifLookAndFeel"));

        
// Only include windows on Windows boxs.
        
OSInfo.OSType osType = AccessController.doPrivileged(OSInfo.getOSTypeAction());
        
if (osType == OSInfo.OSType.WINDOWS) {
            
iLAFs.add(new LookAndFeelInfo("Windows",
                        
"com.sun.java.swing.plaf.windows.WindowsLookAndFeel"));
            
if (Toolkit.getDefaultToolkit().getDesktopProperty(
                    
"win.xpstyle.themeActive") != null) {
                
iLAFs.add(new LookAndFeelInfo("Windows Classic",
                 
"com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel"));
            
}
        
}
        
else if (osType == OSInfo.OSType.MACOSX) {
            
iLAFs.add(new LookAndFeelInfo("Mac OS X", "com.apple.laf.AquaLookAndFeel"));
        
}
        
else {
            
// GTK is not shipped on Windows.
            
iLAFs.add(new LookAndFeelInfo("GTK+",
                  
"com.sun.java.swing.plaf.gtk.GTKLookAndFeel"));
        
}
        
installedLAFs = iLAFs.toArray(new LookAndFeelInfo[iLAFs.size()]);
    
}


    
/**
     
* Returns an array of {@code LookAndFeelInfo}s representing the
     
* {@code LookAndFeel} implementations currently available. The
     
* <code>LookAndFeelInfo</code> objects can be used by an
     
* application to construct a menu of look and feel options for
     
* the user, or to determine which look and feel to set at startup
     
* time. To avoid the penalty of creating numerous {@code
     
* LookAndFeel} objects, {@code LookAndFeelInfo} maintains the
     
* class name of the {@code LookAndFeel} class, not the actual
     
* {@code LookAndFeel} instance.
     
* <p>
     
* The following example illustrates setting the current look and feel
     
* from an instance of {@code LookAndFeelInfo}:
     
* <pre>
     
*
   
UIManager.setLookAndFeel(info.getClassName());
     
* </pre>
     
*
     
* @return an array of <code>LookAndFeelInfo</code> objects
     
* @see #setLookAndFeel
     
*/

    
public static LookAndFeelInfo[] getInstalledLookAndFeels() {
        
maybeInitialize();
        
LookAndFeelInfo[] ilafs = getLAFState().installedLAFs;
        
if (ilafs == null) {
            
ilafs = installedLAFs;
        
}
        
LookAndFeelInfo[] rv = new LookAndFeelInfo[ilafs.length];
        
System.arraycopy(ilafs, 0, rv, 0, ilafs.length);
        
return rv;
    
}


    
/**
     
* Sets the set of available look and feels. While this method does
     
* not check to ensure all of the {@code LookAndFeelInfos} are
     
* {@code non-null}, it is strongly recommended that only {@code non-null}
     
* values are supplied in the {@code infos} array.
     
*
     
* @param infos set of <code>LookAndFeelInfo</code> objects specifying
     
*
        
the available look and feels
     
*
     
* @see #getInstalledLookAndFeels
     
* @throws NullPointerException if {@code infos} is {@code null}
     
*/

    
public static void setInstalledLookAndFeels(LookAndFeelInfo[] infos)
        
throws SecurityException
    
{
        
maybeInitialize();
        
LookAndFeelInfo[] newInfos = new LookAndFeelInfo[infos.length];
        
System.arraycopy(infos, 0, newInfos, 0, infos.length);
        
getLAFState().installedLAFs = newInfos;
    
}


    
/**
     
* Adds the specified look and feel to the set of available look
     
* and feels. While this method allows a {@code null} {@code info},
     
* it is strongly recommended that a {@code non-null} value be used.
     
*
     
* @param info a <code>LookAndFeelInfo</code> object that names the
     
*
          
look and feel and identifies the class that implements it
     
* @see #setInstalledLookAndFeels
     
*/

    
public static void installLookAndFeel(LookAndFeelInfo info) {
        
LookAndFeelInfo[] infos = getInstalledLookAndFeels();
        
LookAndFeelInfo[] newInfos = new LookAndFeelInfo[infos.length + 1];
        
System.arraycopy(infos, 0, newInfos, 0, infos.length);
        
newInfos[infos.length] = info;
        
setInstalledLookAndFeels(newInfos);
    
}


    
/**
     
* Adds the specified look and feel to the set of available look
     
* and feels. While this method does not check the
     
* arguments in any way, it is strongly recommended that {@code
     
* non-null} values be supplied.
     
*
     
* @param name descriptive name of the look and feel
     
* @param className name of the class that implements the look and feel
     
* @see #setInstalledLookAndFeels
     
*/

    
public static void installLookAndFeel(String name, String className) {
        
installLookAndFeel(new LookAndFeelInfo(name, className));
    
}


    
/**
     
* Returns the current look and feel or <code>null</code>.
     
*
     
* @return current look and feel, or <code>null</code>
     
* @see #setLookAndFeel
     
*/

    
public static LookAndFeel getLookAndFeel() {
        
maybeInitialize();
        
return getLAFState().lookAndFeel;
    
}


    
/**
     
* Sets the current look and feel to {@code newLookAndFeel}.
     
* If the current look and feel is {@code non-null} {@code
     
* uninitialize} is invoked on it. If {@code newLookAndFeel} is
     
* {@code non-null}, {@code initialize} is invoked on it followed
     
* by {@code getDefaults}. The defaults returned from {@code
     
* newLookAndFeel.getDefaults()} replace those of the defaults
     
* from the previous look and feel. If the {@code newLookAndFeel} is
     
* {@code null}, the look and feel defaults are set to {@code null}.
     
* <p>
     
* A value of {@code null} can be used to set the look and feel
     
* to {@code null}. As the {@code LookAndFeel} is required for
     
* most of Swing to function, setting the {@code LookAndFeel} to
     
* {@code null} is strongly discouraged.
     
* <p>
     
* This is a JavaBeans bound property.
     
*
     
* @param newLookAndFeel {@code LookAndFeel} to install
     
* @throws UnsupportedLookAndFeelException if
     
*
          
{@code newLookAndFeel} is {@code non-null} and
     
*
          
{@code newLookAndFeel.isSupportedLookAndFeel()} returns
     
*
          
{@code false}
     
* @see #getLookAndFeel
     
*/

    
public static void setLookAndFeel(LookAndFeel newLookAndFeel)
        
throws UnsupportedLookAndFeelException
    
{
        
if ((newLookAndFeel != null) && !newLookAndFeel.isSupportedLookAndFeel()) {
            
String s = newLookAndFeel.toString() + " not supported on this platform";
            
throw new UnsupportedLookAndFeelException(s);
        
}

        
LAFState lafState = getLAFState();
        
LookAndFeel oldLookAndFeel = lafState.lookAndFeel;
        
if (oldLookAndFeel != null) {
            
oldLookAndFeel.uninitialize();
        
}

        
lafState.lookAndFeel = newLookAndFeel;
        
if (newLookAndFeel != null) {
            
sun.swing.DefaultLookup.setDefaultLookup(null);
            
newLookAndFeel.initialize();
            
lafState.setLookAndFeelDefaults(newLookAndFeel.getDefaults());
        
}
        
else {
            
lafState.setLookAndFeelDefaults(null);
        
}

        
SwingPropertyChangeSupport changeSupport = lafState.
                                         
getPropertyChangeSupport
(false);
        
if (changeSupport != null) {
            
changeSupport.firePropertyChange("lookAndFeel", oldLookAndFeel,
                                             
newLookAndFeel);
        
}
    
}


    
/**
     
* Loads the {@code LookAndFeel} specified by the given class
     
* name, using the current thread's context class loader, and
     
* passes it to {@code setLookAndFeel(LookAndFeel)}.
     
*
     
* @param className
  
a string specifying the name of the class that implements
     
*
        
the look and feel
     
* @exception ClassNotFoundException if the <code>LookAndFeel</code>
     
*
           
class could not be found
     
* @exception InstantiationException if a new instance of the class
     
*
          
couldn't be created
     
* @exception IllegalAccessException if the class or initializer isn't accessible
     
* @exception UnsupportedLookAndFeelException if
     
*
          
<code>lnf.isSupportedLookAndFeel()</code> is false
     
* @throws ClassCastException if {@code className} does not identify
     
*
         
a class that extends {@code LookAndFeel}
     
*/

    
public static void setLookAndFeel(String className)
        
throws ClassNotFoundException,
               
InstantiationException,
               
IllegalAccessException,
               
UnsupportedLookAndFeelException
    
{
        
if ("javax.swing.plaf.metal.MetalLookAndFeel".equals(className)) {
            
// Avoid reflection for the common case of metal.
            
setLookAndFeel(new javax.swing.plaf.metal.MetalLookAndFeel());
        
}
        
else {
            
Class lnfClass = SwingUtilities.loadSystemClass(className);
            
setLookAndFeel((LookAndFeel)(lnfClass.newInstance()));
        
}
    
}

    
/**
     
* Returns the name of the <code>LookAndFeel</code> class that implements
     
* the native system look and feel if there is one, otherwise
     
* the name of the default cross platform <code>LookAndFeel</code>
     
* class. This value can be overriden by setting the
     
* <code>swing.systemlaf</code> system property.
     
*
     
* @return the <code>String</code> of the <code>LookAndFeel</code>
     
*
          
class
     
*
     
* @see #setLookAndFeel
     
* @see #getCrossPlatformLookAndFeelClassName
     
*/

    
public static String getSystemLookAndFeelClassName() {
        
String systemLAF = AccessController.doPrivileged(
                             
new GetPropertyAction("swing.systemlaf"));
        
if (systemLAF != null) {
            
return systemLAF;
        
}
        
OSInfo.OSType osType = AccessController.doPrivileged(OSInfo.getOSTypeAction());
        
if (osType == OSInfo.OSType.WINDOWS) {
            
return "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
        
} else {
            
String desktop = AccessController.doPrivileged(new GetPropertyAction("sun.desktop"));
            
Toolkit toolkit = Toolkit.getDefaultToolkit();
            
if ("gnome".equals(desktop) &&
                    
toolkit instanceof SunToolkit &&
                    
((SunToolkit) toolkit).isNativeGTKAvailable()) {
                
// May be set on Linux and Solaris boxs.
                
return "com.sun.java.swing.plaf.gtk.GTKLookAndFeel";
            
}
            
if (osType == OSInfo.OSType.MACOSX) {
                
if (toolkit.getClass() .getName()
                                       
.equals("sun.lwawt.macosx.LWCToolkit")) {
                    
return "com.apple.laf.AquaLookAndFeel";
                
}
            
}
            
if (osType == OSInfo.OSType.SOLARIS) {
                
return "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
            
}
        
}
        
return getCrossPlatformLookAndFeelClassName();
    
}


    
/**
     
* Returns the name of the <code>LookAndFeel</code> class that implements
     
* the default cross platform look and feel -- the Java
     
* Look and Feel (JLF).
  
This value can be overriden by setting the
     
* <code>swing.crossplatformlaf</code> system property.
     
*
     
* @return
  
a string with the JLF implementation-class
     
* @see #setLookAndFeel
     
* @see #getSystemLookAndFeelClassName
     
*/

    
public static String getCrossPlatformLookAndFeelClassName() {
        
String laf = AccessController.doPrivileged(
                             
new GetPropertyAction("swing.crossplatformlaf"));
        
if (laf != null) {
            
return laf;
        
}
        
return "javax.swing.plaf.metal.MetalLookAndFeel";
    
}


    
/**
     
* Returns the defaults. The returned defaults resolve using the
     
* logic specified in the class documentation.
     
*
     
* @return a <code>UIDefaults</code> object containing the default values
     
*/

    
public static UIDefaults getDefaults() {
        
maybeInitialize();
        
return getLAFState().multiUIDefaults;
    
}

    
/**
     
* Returns a font from the defaults. If the value for {@code key} is
     
* not a {@code Font}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the font
     
* @return the <code>Font</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
*/

    
public static Font getFont(Object key) {
        
return getDefaults().getFont(key);
    
}

    
/**
     
* Returns a font from the defaults that is appropriate
     
* for the given locale. If the value for {@code key} is
     
* not a {@code Font}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the font
     
* @param l the <code>Locale</code> for which the font is desired; refer
     
*
        
to {@code UIDefaults} for details on how a {@code null}
     
*
        
{@code Locale} is handled
     
* @return the <code>Font</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
* @since 1.4
     
*/

    
public static Font getFont(Object key, Locale l) {
        
return getDefaults().getFont(key,l);
    
}

    
/**
     
* Returns a color from the defaults. If the value for {@code key} is
     
* not a {@code Color}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the color
     
* @return the <code>Color</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
*/

    
public static Color getColor(Object key) {
        
return getDefaults().getColor(key);
    
}

    
/**
     
* Returns a color from the defaults that is appropriate
     
* for the given locale. If the value for {@code key} is
     
* not a {@code Color}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the color
     
* @param l the <code>Locale</code> for which the color is desired; refer
     
*
        
to {@code UIDefaults} for details on how a {@code null}
     
*
        
{@code Locale} is handled
     
* @return the <code>Color</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
* @since 1.4
     
*/

    
public static Color getColor(Object key, Locale l) {
        
return getDefaults().getColor(key,l);
    
}

    
/**
     
* Returns an <code>Icon</code> from the defaults. If the value for
     
* {@code key} is not an {@code Icon}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the icon
     
* @return the <code>Icon</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
*/

    
public static Icon getIcon(Object key) {
        
return getDefaults().getIcon(key);
    
}

    
/**
     
* Returns an <code>Icon</code> from the defaults that is appropriate
     
* for the given locale. If the value for
     
* {@code key} is not an {@code Icon}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the icon
     
* @param l the <code>Locale</code> for which the icon is desired; refer
     
*
        
to {@code UIDefaults} for details on how a {@code null}
     
*
        
{@code Locale} is handled
     
* @return the <code>Icon</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
* @since 1.4
     
*/

    
public static Icon getIcon(Object key, Locale l) {
        
return getDefaults().getIcon(key,l);
    
}

    
/**
     
* Returns a border from the defaults. If the value for
     
* {@code key} is not a {@code Border}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the border
     
* @return the <code>Border</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
*/

    
public static Border getBorder(Object key) {
        
return getDefaults().getBorder(key);
    
}

    
/**
     
* Returns a border from the defaults that is appropriate
     
* for the given locale.
  
If the value for
     
* {@code key} is not a {@code Border}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the border
     
* @param l the <code>Locale</code> for which the border is desired; refer
     
*
        
to {@code UIDefaults} for details on how a {@code null}
     
*
        
{@code Locale} is handled
     
* @return the <code>Border</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
* @since 1.4
     
*/

    
public static Border getBorder(Object key, Locale l) {
        
return getDefaults().getBorder(key,l);
    
}

    
/**
     
* Returns a string from the defaults. If the value for
     
* {@code key} is not a {@code String}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the string
     
* @return the <code>String</code>
     
* @throws NullPointerException if {@code key} is {@code null}
     
*/

    
public static String getString(Object key) {
        
return getDefaults().getString(key);
    
}

    
/**
     
* Returns a string from the defaults that is appropriate for the
     
* given locale.
  
If the value for
     
* {@code key} is not a {@code String}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the string
     
* @param l the <code>Locale</code> for which the string is desired; refer
     
*
        
to {@code UIDefaults} for details on how a {@code null}
     
*
        
{@code Locale} is handled
     
* @return the <code>String</code>
     
* @since 1.4
     
* @throws NullPointerException if {@code key} is {@code null}
     
*/

    
public static String getString(Object key, Locale l) {
        
return getDefaults().getString(key,l);
    
}

    
/**
     
* Returns a string from the defaults that is appropriate for the
     
* given locale.
  
If the value for
     
* {@code key} is not a {@code String}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the string
     
* @param c {@code Component} used to determine the locale;
     
*
          
{@code null} implies the default locale as
     
*
          
returned by {@code Locale.getDefault()}
     
* @return the <code>String</code>
     
* @throws NullPointerException if {@code key} is {@code null}
     
*/

    
static String getString(Object key, Component c) {
        
Locale l = (c == null) ? Locale.getDefault() : c.getLocale();
        
return getString(key, l);
    
}

    
/**
     
* Returns an integer from the defaults. If the value for
     
* {@code key} is not an {@code Integer}, or does not exist,
     
* {@code 0} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the int
     
* @return the int
     
* @throws NullPointerException if {@code key} is {@code null}
     
*/

    
public static int getInt(Object key) {
        
return getDefaults().getInt(key);
    
}

    
/**
     
* Returns an integer from the defaults that is appropriate
     
* for the given locale. If the value for
     
* {@code key} is not an {@code Integer}, or does not exist,
     
* {@code 0} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the int
     
* @param l the <code>Locale</code> for which the int is desired; refer
     
*
        
to {@code UIDefaults} for details on how a {@code null}
     
*
        
{@code Locale} is handled
     
* @return the int
     
* @throws NullPointerException if {@code key} is {@code null}
     
* @since 1.4
     
*/

    
public static int getInt(Object key, Locale l) {
        
return getDefaults().getInt(key,l);
    
}

    
/**
     
* Returns a boolean from the defaults which is associated with
     
* the key value. If the key is not found or the key doesn't represent
     
* a boolean value then {@code false} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the key for the desired boolean value
     
* @return the boolean value corresponding to the key
     
* @throws NullPointerException if {@code key} is {@code null}
     
* @since 1.4
     
*/

    
public static boolean getBoolean(Object key) {
        
return getDefaults().getBoolean(key);
    
}

    
/**
     
* Returns a boolean from the defaults which is associated with
     
* the key value and the given <code>Locale</code>. If the key is not
     
* found or the key doesn't represent
     
* a boolean value then {@code false} will be returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the key for the desired
     
*
             
boolean value
     
* @param l the <code>Locale</code> for which the boolean is desired; refer
     
*
        
to {@code UIDefaults} for details on how a {@code null}
     
*
        
{@code Locale} is handled
     
* @return the boolean value corresponding to the key
     
* @throws NullPointerException if {@code key} is {@code null}
     
* @since 1.4
     
*/

    
public static boolean getBoolean(Object key, Locale l) {
        
return getDefaults().getBoolean(key,l);
    
}

    
/**
     
* Returns an <code>Insets</code> object from the defaults. If the value
     
* for {@code key} is not an {@code Insets}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the <code>Insets</code> object
     
* @return the <code>Insets</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
*/

    
public static Insets getInsets(Object key) {
        
return getDefaults().getInsets(key);
    
}

    
/**
     
* Returns an <code>Insets</code> object from the defaults that is
     
* appropriate for the given locale. If the value
     
* for {@code key} is not an {@code Insets}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the <code>Insets</code> object
     
* @param l the <code>Locale</code> for which the object is desired; refer
     
*
        
to {@code UIDefaults} for details on how a {@code null}
     
*
        
{@code Locale} is handled
     
* @return the <code>Insets</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
* @since 1.4
     
*/

    
public static Insets getInsets(Object key, Locale l) {
        
return getDefaults().getInsets(key,l);
    
}

    
/**
     
* Returns a dimension from the defaults. If the value
     
* for {@code key} is not a {@code Dimension}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the dimension object
     
* @return the <code>Dimension</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
*/

    
public static Dimension getDimension(Object key) {
        
return getDefaults().getDimension(key);
    
}

    
/**
     
* Returns a dimension from the defaults that is appropriate
     
* for the given locale. If the value
     
* for {@code key} is not a {@code Dimension}, {@code null} is returned.
     
*
     
* @param key
  
an <code>Object</code> specifying the dimension object
     
* @param l the <code>Locale</code> for which the object is desired; refer
     
*
        
to {@code UIDefaults} for details on how a {@code null}
     
*
        
{@code Locale} is handled
     
* @return the <code>Dimension</code> object
     
* @throws NullPointerException if {@code key} is {@code null}
     
* @since 1.4
     
*/

    
public static Dimension getDimension(Object key, Locale l) {
        
return getDefaults().getDimension(key,l);
    
}

    
/**
     
* Returns an object from the defaults.
     
*
     
* @param key
  
an <code>Object</code> specifying the desired object
     
* @return the <code>Object</code>
     
* @throws NullPointerException if {@code key} is {@code null}
     
*/

    
public static Object get(Object key) {
        
return getDefaults().get(key);
    
}

    
/**
     
* Returns an object from the defaults that is appropriate for
     
* the given locale.
     
*
     
* @param key
  
an <code>Object</code> specifying the desired object
     
* @param l the <code>Locale</code> for which the object is desired; refer
     
*
        
to {@code UIDefaults} for details on how a {@code null}
     
*
        
{@code Locale} is handled
     
* @return the <code>Object</code>
     
* @throws NullPointerException if {@code key} is {@code null}
     
* @since 1.4
     
*/

    
public static Object get(Object key, Locale l) {
        
return getDefaults().get(key,l);
    
}

    
/**
     
* Stores an object in the developer defaults. This is a cover method
     
* for {@code getDefaults().put(key, value)}. This only effects the
     
* developer defaults, not the system or look and feel defaults.
     
*
     
* @param key
    
an <code>Object</code> specifying the retrieval key
     
* @param value
  
the <code>Object</code> to store; refer to
     
*
               
{@code UIDefaults} for details on how {@code null} is
     
*
               
handled
     
* @return the <code>Object</code> returned by {@link UIDefaults#put}
     
* @throws NullPointerException if {@code key} is {@code null}
     
* @see UIDefaults#put
     
*/

    
public static Object put(Object key, Object value) {
        
return getDefaults().put(key, value);
    
}

    
/**
     
* Returns the appropriate {@code ComponentUI} implementation for
     
* {@code target}. Typically, this is a cover for
     
* {@code getDefaults().getUI(target)}. However, if an auxiliary
     
* look and feel has been installed, this first invokes
     
* {@code getUI(target)} on the multiplexing look and feel's
     
* defaults, and returns that value if it is {@code non-null}.
     
*
     
* @param target the <code>JComponent</code> to return the
     
*
        
{@code ComponentUI} for
     
* @return the <code>ComponentUI</code> object for {@code target}
     
* @throws NullPointerException if {@code target} is {@code null}
     
* @see UIDefaults#getUI
     
*/

    
public static ComponentUI getUI(JComponent target) {
        
maybeInitialize();
        
maybeInitializeFocusPolicy(target);
        
ComponentUI ui = null;
        
LookAndFeel multiLAF = getLAFState().multiLookAndFeel;
        
if (multiLAF != null) {
            
// This can return null if the multiplexing look and feel
            
// doesn't support a particular UI.
            
ui = multiLAF.getDefaults().getUI(target);
        
}
        
if (ui == null) {
            
ui = getDefaults().getUI(target);
        
}
        
return ui;
    
}


    
/**
     
* Returns the {@code UIDefaults} from the current look and feel,
     
* that were obtained at the time the look and feel was installed.
     
* <p>
     
* In general, developers should use the {@code UIDefaults} returned from
     
* {@code getDefaults()}. As the current look and feel may expect
     
* certain values to exist, altering the {@code UIDefaults} returned
     
* from this method could have unexpected results.
     
*
     
* @return <code>UIDefaults</code> from the current look and feel
     
* @see #getDefaults
     
* @see #setLookAndFeel(LookAndFeel)
     
* @see LookAndFeel#getDefaults
     
*/

    
public static UIDefaults getLookAndFeelDefaults() {
        
maybeInitialize();
        
return getLAFState().getLookAndFeelDefaults();
    
}

    
/**
     
* Finds the Multiplexing <code>LookAndFeel</code>.
     
*/
    
private static LookAndFeel getMultiLookAndFeel() {
        
LookAndFeel multiLookAndFeel = getLAFState().multiLookAndFeel;
        
if (multiLookAndFeel == null) {
            
String defaultName = "javax.swing.plaf.multi.MultiLookAndFeel";
            
String className = getLAFState().swingProps.getProperty(multiplexingLAFKey, defaultName);
            
try {
                
Class lnfClass = SwingUtilities.loadSystemClass(className);
                
multiLookAndFeel = (LookAndFeel)lnfClass.newInstance();
            
} catch (Exception exc) {
                
System.err.println("UIManager: failed loading " + className);
            
}
        
}
        
return multiLookAndFeel;
    
}

    
/**
     
* Adds a <code>LookAndFeel</code> to the list of auxiliary look and feels.
     
* The auxiliary look and feels tell the multiplexing look and feel what
     
* other <code>LookAndFeel</code> classes for a component instance are to be used
     
* in addition to the default <code>LookAndFeel</code> class when creating a
     
* multiplexing UI.
  
The change will only take effect when a new
     
* UI class is created or when the default look and feel is changed
     
* on a component instance.
     
* <p>Note these are not the same as the installed look and feels.
     
*
     
* @param laf the <code>LookAndFeel</code> object
     
* @see #removeAuxiliaryLookAndFeel
     
* @see #setLookAndFeel
     
* @see #getAuxiliaryLookAndFeels
     
* @see #getInstalledLookAndFeels
     
*/

    
static public void addAuxiliaryLookAndFeel(LookAndFeel laf) {
        
maybeInitialize();

        
if (!laf.isSupportedLookAndFeel()) {
            
// Ideally we would throw an exception here, but it's too late
            
// for that.
            
return;
        
}
        
Vector<LookAndFeel> v = getLAFState().auxLookAndFeels;
        
if (v == null) {
            
v = new Vector<LookAndFeel>();
        
}

        
if (!v.contains(laf)) {
            
v.addElement(laf);
            
laf.initialize();
            
getLAFState().auxLookAndFeels = v;

            
if (getLAFState().multiLookAndFeel == null) {
                
getLAFState().multiLookAndFeel = getMultiLookAndFeel();
            
}
        
}
    
}

    
/**
     
* Removes a <code>LookAndFeel</code> from the list of auxiliary look and feels.
     
* The auxiliary look and feels tell the multiplexing look and feel what
     
* other <code>LookAndFeel</code> classes for a component instance are to be used
     
* in addition to the default <code>LookAndFeel</code> class when creating a
     
* multiplexing UI.
  
The change will only take effect when a new
     
* UI class is created or when the default look and feel is changed
     
* on a component instance.
     
* <p>Note these are not the same as the installed look and feels.
     
* @return true if the <code>LookAndFeel</code> was removed from the list
     
* @see #removeAuxiliaryLookAndFeel
     
* @see #getAuxiliaryLookAndFeels
     
* @see #setLookAndFeel
     
* @see #getInstalledLookAndFeels
     
*/

    
static public boolean removeAuxiliaryLookAndFeel(LookAndFeel laf) {
        
maybeInitialize();

        
boolean result;

        
Vector<LookAndFeel> v = getLAFState().auxLookAndFeels;
        
if ((v == null) || (v.size() == 0)) {
            
return false;
        
}

        
result = v.removeElement(laf);
        
if (result) {
            
if (v.size() == 0) {
                
getLAFState().auxLookAndFeels = null;
                
getLAFState().multiLookAndFeel = null;
            
} else {
                
getLAFState().auxLookAndFeels = v;
            
}
        
}
        
laf.uninitialize();

        
return result;
    
}

    
/**
     
* Returns the list of auxiliary look and feels (can be <code>null</code>).
     
* The auxiliary look and feels tell the multiplexing look and feel what
     
* other <code>LookAndFeel</code> classes for a component instance are
     
* to be used in addition to the default LookAndFeel class when creating a
     
* multiplexing UI.
     
* <p>Note these are not the same as the installed look and feels.
     
*
     
* @return list of auxiliary <code>LookAndFeel</code>s or <code>null</code>
     
* @see #addAuxiliaryLookAndFeel
     
* @see #removeAuxiliaryLookAndFeel
     
* @see #setLookAndFeel
     
* @see #getInstalledLookAndFeels
     
*/

    
static public LookAndFeel[] getAuxiliaryLookAndFeels() {
        
maybeInitialize();

        
Vector<LookAndFeel> v = getLAFState().auxLookAndFeels;
        
if ((v == null) || (v.size() == 0)) {
            
return null;
        
}
        
else {
            
LookAndFeel[] rv = new LookAndFeel[v.size()];
            
for (int i = 0; i < rv.length; i++) {
                
rv[i] = v.elementAt(i);
            
}
            
return rv;
        
}
    
}


    
/**
     
* Adds a <code>PropertyChangeListener</code> to the listener list.
     
* The listener is registered for all properties.
     
*
     
* @param listener
  
the <code>PropertyChangeListener</code> to be added
     
*
 

     
*/

    
public static void addPropertyChangeListener(PropertyChangeListener listener)
    
{
        
synchronized (classLock) {
            
getLAFState().getPropertyChangeSupport(true).
                             
addPropertyChangeListener(listener);
        
}
    
}


    
/**
     
* Removes a <code>PropertyChangeListener</code> from the listener list.
     
* This removes a <code>PropertyChangeListener</code> that was registered
     
* for all properties.
     
*
     
* @param listener
  
the <code>PropertyChangeListener</code> to be removed
     
*
 

     
*/

    
public static void removePropertyChangeListener(PropertyChangeListener listener)
    
{
        
synchronized (classLock) {
            
getLAFState().getPropertyChangeSupport(true).
                          
removePropertyChangeListener(listener);
        
}
    
}


    
/**
     
* Returns an array of all the <code>PropertyChangeListener</code>s added
     
* to this UIManager with addPropertyChangeListener().
     
*
     
* @return all of the <code>PropertyChangeListener</code>s added or an empty
     
*
         
array if no listeners have been added
     
* @since 1.4
     
*/

    
public static PropertyChangeListener[] getPropertyChangeListeners() {
        
synchronized(classLock) {
            
return getLAFState().getPropertyChangeSupport(true).
                      
getPropertyChangeListeners();
        
}
    
}

    
private static Properties loadSwingProperties()
    
{
        
/* Don't bother checking for Swing properties if untrusted, as
         
* there's no way to look them up without triggering SecurityExceptions.
         
*/

        
if (UIManager.class.getClassLoader() != null) {
            
return new Properties();
        
}
        
else {
            
final Properties props = new