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+/* LookAndFeel.java --
+   Copyright (C) 2002, 2004, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.swing;
+
+import java.awt.Component;
+import java.awt.Toolkit;
+
+import javax.swing.text.JTextComponent;
+
+public abstract class LookAndFeel
+{
+  /**
+   * This method is called once by UIManager.setLookAndFeel to create
+   * the look and feel specific defaults table.
+   *
+   * @return the UI defaults
+   */
+  public UIDefaults getDefaults()
+  {
+    return null;
+  }
+
+  /**
+   * Returns a description of the look and feel.
+   * 
+   * @return A description of the look and feel.
+   */
+  public abstract String getDescription();
+
+  public static Object getDesktopPropertyValue(String systemPropertyName, 
+      Object fallbackValue)
+  {
+    Object value = Toolkit.getDefaultToolkit().getDesktopProperty(systemPropertyName);
+    return value != null ? value : fallbackValue;
+  }
+  
+  /**
+   * Returns an identifier for the look and feel.
+   * 
+   * @return An identifier for the look and feel.
+   */
+  public abstract String getID();
+
+  /**
+   * Returns the name for the look and feel.
+   * 
+   * @return The name for the look and feel.
+   */
+  public abstract String getName();
+
+  /**
+   * Returns true when the Look and Feel supports window decorations,
+   * false others. This method returns always false and needs to be overwritten
+   * when the derived Look and Feel supports this.
+   *
+   * @return false
+   *
+   * @since 1.4
+   */
+  public boolean getSupportsWindowDecorations()
+  {
+    return false;
+  }
+  
+  /**
+   * UIManager.setLookAndFeel calls this method before the first call
+   * (and typically the only call) to getDefaults(). 
+   */
+  public void initialize()
+  {
+  }
+
+  /**
+   * Convenience method for installing a component's default Border object
+   * on the specified component if either the border is currently null
+   * or already an instance of UIResource. 
+   */
+  public static void installBorder(JComponent c, String defaultBorderName)
+  {
+  }
+
+  /**
+   * Convenience method for initializing a component's foreground and
+   * background color properties with values from the current defaults table.
+   */
+  public static void installColors(JComponent c, String defaultBgName, String defaultFgName)
+  {
+  }
+
+  /**
+   * Convenience method for initializing a components foreground background
+   * and font properties with values from the current defaults table. 
+   */
+  public static void installColorsAndFont(JComponent component,
+					  String defaultBgName,
+					  String defaultFgName,
+					  String defaultFontName)
+  {
+  }
+
+  /**
+   * Returns <code>true</code> if the look and feel is the "native" look and
+   * feel for the current platform, and <code>false</code> otherwise.
+   * 
+   * @return A flag indicating whether or not this is the native look and feel
+   *         for the current platform.
+   */
+  public abstract boolean isNativeLookAndFeel();
+
+  /**
+   * Returns <code>true</code> if the look and feel is supported on the 
+   * current operating system, and <code>false</code> otherwise.  This 
+   * mechanism is provided so that it is possible to prevent a look and feel
+   * from being used on some operating systems (usually for legal, not
+   * technical, reasons).
+   * 
+   * @return A flag indicating whether or not the look and feel is supported
+   *         on the current platform.
+   */
+  public abstract boolean isSupportedLookAndFeel();
+
+  /**
+   * Loads the bindings in keys into retMap. 
+   */
+  public static void loadKeyBindings(InputMap retMap, Object[] keys)
+  {
+  }
+
+  /**
+   * Creates a ComponentInputMap from keys. 
+   */
+  public static ComponentInputMap makeComponentInputMap(JComponent c,
+							Object[] keys)
+  {
+    return null;
+  }
+
+  /**
+   * Utility method that creates a UIDefaults.LazyValue that creates an
+   * ImageIcon UIResource for the specified gifFile filename. 
+   */
+  public static Object makeIcon(Class baseClass, String gifFile)
+  {
+    return null;
+  }
+
+  /**
+   * Creates a InputMap from keys. 
+   */
+  public static InputMap makeInputMap(Object[] keys)
+  {
+    return null;
+  }
+
+  /**
+   * Convenience method for building lists of KeyBindings.  
+   */
+  public static JTextComponent.KeyBinding[] makeKeyBindings(Object[] keyBindingList)
+  {
+    return null;
+  }
+
+  /**
+   * Invoked when the user attempts an invalid operation. The default implement
+   * just beeps. Subclasses that wish to change this need to override this
+   * method.
+   *
+   * @param component the component the error occured in
+   */
+  public void provideErrorFeedback(Component component)
+  {
+    Toolkit.getDefaultToolkit().beep();
+  }
+
+  /**
+   * Returns a string that displays and identifies this object's properties.
+   *
+   * @return the string "LookAndFeel"
+   */
+  public String toString()
+  {
+    return "LookAndFeel";
+  }
+
+  /**
+   * UIManager.setLookAndFeel calls this method just before we're replaced by
+   * a new default look and feel. 
+   */
+  public void uninitialize()
+  {
+  }
+
+  /**
+   * Convenience method for un-installing a component's default border on the
+   * specified component if the border is currently an instance of UIResource.
+   */
+  public static void uninstallBorder(JComponent c)
+  {
+  }
+}