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diff --git a/libjava/classpath/javax/swing/PopupFactory.java b/libjava/classpath/javax/swing/PopupFactory.java
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+/* PopupFactory.java --
+   Copyright (C) 2003 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.Dimension;
+import java.awt.Point;
+
+
+/**
+ * A factory for <code>Popup</code> objects. These are used to
+ * managed little windows that float over everything else,
+ * typically containing a popup menu.
+ *
+ * @since 1.4
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public class PopupFactory
+{
+  /**
+   * The shared factory object.
+   *
+   * @see #getSharedInstance
+   * @see #setSharedInstance
+   */
+  private static PopupFactory sharedFactory;
+
+
+  /**
+   * Constructs a new <code>PopupFactory</code>. Usually, a single
+   * <code>PopupFactory</code> is shared among multiple consumers
+   * of <code>Popup</code>. Use {@link #getSharedInstance} to retrieve
+   * the current factory.
+   */
+  public PopupFactory()
+  {
+    // Nothing to do here.
+  }
+
+
+  /**
+   * Sets the shared factory.
+   *
+   * @param factory the PopupFactory that future invocations of
+   *        {@link #getSharedInstance} will return.
+   *
+   * @throws IllegalArgumentException if <code>factory</code>
+   *         is <code>null</code>.
+   */
+  public static void setSharedInstance(PopupFactory factory)
+  {
+    if (factory == null)
+      throw new IllegalArgumentException();
+
+    /* Swing is not designed to be thread-safe, so there is no
+     * need to synchronize the access to the global variable.
+     */
+    sharedFactory = factory;
+  }
+
+
+  /**
+   * Retrieves the shared factory, creating a new factory if
+   * necessary.
+   *
+   * @return a <code>PopupFactory</code> that can be used
+   *         to create <code>Popup</code> objects.
+   */
+  public static PopupFactory getSharedInstance()
+  {
+    /* Swing is not designed to be thread-safe, so there is no
+     * need to synchronize the access to the global variable.
+     */
+    if (sharedFactory == null)
+      sharedFactory = new PopupFactory();
+
+    return sharedFactory;
+  }
+
+
+  /**
+   * Creates a new <code>Popup</code> given its owner,
+   * contents and the screen position where the popup
+   * will appear.
+   *
+   * @param owner the Component to which <code>x</code> and
+   *        <code>y</code> are relative, or <code>null</code> for
+   *        placing the popup relative to the origin of the screen.
+   *
+   * @param contents the contents that will be displayed inside
+   *        the <code>Popup</code>.
+   *
+   * @param x the horizontal position where the Popup will appear.
+   *
+   * @param y the vertical position where the Popup will appear.
+   *
+   * @throws IllegalArgumentException if <code>contents</code>
+   *         is <code>null</code>.
+   */
+  public Popup getPopup(Component owner, Component contents,
+                        int x, int y)
+  {
+    Popup popup = null;
+    // By default we enable lightweight popups since they are more efficient
+    // than heavyweight popups.
+    boolean lightweightEnabled = true;
+    // Special case JPopupMenu here, since it supports a lightweightEnabled
+    // flag that we must respect.
+    if (contents instanceof JPopupMenu)
+      {
+        JPopupMenu menu = (JPopupMenu) contents;
+        lightweightEnabled = menu.isLightWeightPopupEnabled();
+      }
+
+    // If we have a root pane and the contents fits within the root pane and
+    // lightweight popups are enabled, than we can use a lightweight popup.
+    JRootPane root = SwingUtilities.getRootPane(owner);
+    if (root != null)
+      {
+        Point rootLoc = root.getLocationOnScreen();
+        Dimension contentsSize = contents.getSize();
+        Dimension rootSize = root.getSize();
+        if (x >= rootLoc.x && y > rootLoc.y
+            && (x - rootLoc.x) + contentsSize.width < rootSize.width
+            && (y - rootLoc.y) + contentsSize.height < rootSize.height)
+          popup = new Popup.LightweightPopup(owner, contents, x, y);
+        else
+          popup = new Popup.JWindowPopup(owner, contents, x, y);
+      }
+    else
+      popup = new Popup.JWindowPopup(owner, contents, x, y);
+    return popup;
+  }
+}