1 files changed, 164 insertions, 0 deletions
diff --git a/libjava/classpath/javax/swing/CompatibilityFocusTraversalPolicy.java b/libjava/classpath/javax/swing/CompatibilityFocusTraversalPolicy.java
new file mode 100644
index 000000000..40c2010c3
--- /dev/null
+++ b/libjava/classpath/javax/swing/CompatibilityFocusTraversalPolicy.java
@@ -0,0 +1,164 @@
+/* CompatibilityFocusTraversalPolicy.java -- Provides compatibility to old
+                                             focus API
+   Copyright (C) 2006 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.Container;
+import java.awt.FocusTraversalPolicy;
+import java.util.HashMap;
+
+/**
+ * Provides compatibility to the older focus API in
+ * {@link JComponent#setNextFocusableComponent(Component)}.
+ *
+ * @author Roman Kennke (kennke@aicas.com)
+ */
+class CompatibilityFocusTraversalPolicy
+  extends FocusTraversalPolicy
+{
+
+  /**
+   * The focus traversal policy that has been installed on the focus cycle
+   * root before, and to which we fall back.
+   */
+  private FocusTraversalPolicy fallback;
+
+  /**
+   * Maps components to their next focused components.
+   */
+  private HashMap forward;
+
+  /**
+   * Maps components to their previous focused components.
+   */
+  private HashMap backward;
+
+  /**
+   * Creates a new CompatibilityFocusTraversalPolicy with the specified
+   * policy as fallback.
+   *
+   * @param p the fallback policy
+   */
+  CompatibilityFocusTraversalPolicy(FocusTraversalPolicy p)
+  {
+    fallback = p;
+    forward = new HashMap();
+    backward = new HashMap();
+  }
+
+  public Component getComponentAfter(Container root, Component current)
+  {
+    Component next = (Component) forward.get(current);
+    if (next == null && fallback != null)
+      next = fallback.getComponentAfter(root, current);
+    return next;
+  }
+
+  public Component getComponentBefore(Container root, Component current)
+  {
+    Component previous = (Component) backward.get(current);
+    if (previous == null && fallback != null)
+      previous = fallback.getComponentAfter(root, current);
+    return previous;
+  }
+
+  public Component getFirstComponent(Container root)
+  {
+    Component first = null;
+    if (fallback != null)
+      first = fallback.getFirstComponent(root);
+    return first;
+  }
+
+  public Component getLastComponent(Container root)
+  {
+    Component last = null;
+    if (fallback != null)
+      last = fallback.getLastComponent(root);
+    return last;
+  }
+
+  public Component getDefaultComponent(Container root)
+  {
+    Component def = null;
+    if (fallback != null)
+      def = fallback.getDefaultComponent(root);
+    return def;
+  }
+
+  /**
+   * Sets a next focused component for a specified component. This is called
+   * by {@link JComponent#setNextFocusableComponent(Component)}.
+   *
+   * @param current the current component
+   * @param next the next focused component
+   */
+  void setNextFocusableComponent(Component current, Component next)
+  {
+    forward.put(current, next);
+    backward.put(next, current);
+  }
+
+  /**
+   * Sets a next focused component for a specified component. This is called
+   * by {@link JComponent#setNextFocusableComponent(Component)}.
+   *
+   * @param current the current component
+   * @param next the next focused component
+   */
+  void addNextFocusableComponent(Component current, Component next)
+  {
+    forward.put(current, next);
+    backward.put(next, current);
+  }
+
+  /**
+   * Removes a focused component mapping. This is called
+   * by {@link JComponent#setNextFocusableComponent(Component)}.
+   *
+   * @param current the current component
+   * @param next the next focused component
+   */
+  void removeNextFocusableComponent(Component current, Component next)
+  {
+    forward.remove(current);
+    backward.remove(next);
+  }
+}