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+/* DefaultFocusTraversalPolicy.java -- 
+   Copyright (C) 2002, 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 java.awt;
+
+/**
+ * DefaultFocusTraversalPolicy is the default focus traversal policy
+ * used by Containers.
+ *
+ * This policy sharpens ContainerOrderFocusTraversalPolicy's
+ * acceptance criteria, to reject those Components that have
+ * unfocusable peers.  Despite this extra strictness, this policy will
+ * always accept a Component that has explicitly been set focusable by
+ * any means.
+ *
+ * This AWT implementation assumes that the peers of the following
+ * Components are not focusable: Canvas, Panel, Label, ScrollPane,
+ * Scrollbar, Window, and any lightweight Component.
+ *
+ * A Component's focusability is independent of the focusability of
+ * its peer.
+ *
+ * @author Thomas Fitzsimmons (fitzsim@redhat.com)
+ * @since 1.4
+ */
+public class DefaultFocusTraversalPolicy
+  extends ContainerOrderFocusTraversalPolicy
+{
+  /**
+   * Construct a default focus traversal policy.
+   */
+  public DefaultFocusTraversalPolicy ()
+  {
+  }
+
+  /**
+   * Check whether a given Component would be acceptable as a focus
+   * owner.  The Component must be displayable, visible and enabled to
+   * be acceptable.  If the Component's focus traversability has been
+   * overridden, by overriding Component.isFocusTraversable or
+   * Component.isFocusable, or by calling Component.setFocusable, then
+   * the Component will be accepted if it is focusable.  If the
+   * Component uses the default focus traversable behaviour, then
+   * <code>comp</code> will always be rejected if it is a Canvas,
+   * Panel, Label, ScrollPane, Scrollbar, Window or lightweight
+   * Component.
+   *
+   * @param comp the Component to check
+   *
+   * @return true if the Component is an acceptable target for
+   * keyboard input focus, false otherwise
+   */
+  protected boolean accept (Component comp)
+  {
+    if (comp.visible
+	&& comp.isDisplayable ()
+	&& comp.enabled)
+      {
+	if (comp.isFocusTraversableOverridden != 0
+	    && (comp.isFocusTraversable () || comp.isFocusable()))
+          return true;
+        
+	if (!(comp instanceof Canvas
+              || comp instanceof Panel
+              || comp instanceof Label
+              || comp instanceof ScrollPane
+              || comp instanceof Scrollbar
+              || comp instanceof Window
+              || comp.isLightweight ()))
+          return true;
+      }
+    return false;
+  }
+}