More AWT/Swing merge from GNU Classpath.

From-SVN: r56149

1 files changed, 107 insertions, 0 deletions

diff --git a/libjava/gnu/java/awt/EventModifier.java b/libjava/gnu/java/awt/EventModifier.java
new file mode 100644
index 0000000..fe1a278
--- /dev/null
+++ b/libjava/gnu/java/awt/EventModifier.java
@@ -0,0 +1,107 @@
+/* EventModifier.java -- tool for converting modifier bits to 1.4 syle
+   Copyright (C) 2002 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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 gnu.java.awt;
+
+import java.awt.event.InputEvent;
+
+public class EventModifier
+{
+  /** The mask for old events. */
+  public static final int OLD_MASK = 0x3f;
+
+  /** The mask for new events. */
+  public static final int NEW_MASK = 0x3fc0;
+
+  /**
+   * Non-instantiable.
+   */
+  private EventModifier()
+  {
+    throw new InternalError();
+  }
+
+  /**
+   * Converts the old style modifiers (0x3f) to the new style (0xffffffc0).
+   *
+   * @param mod the modifiers to convert
+   * @return the adjusted modifiers
+   */
+  public static int extend(int mod)
+  {
+    // Favor what we hope will be the common case.
+    if ((mod & OLD_MASK) == 0)
+      return mod;
+    if ((mod & InputEvent.SHIFT_MASK) != 0)
+      mod |= InputEvent.SHIFT_DOWN_MASK;
+    if ((mod & InputEvent.CTRL_MASK) != 0)
+      mod |= InputEvent.CTRL_DOWN_MASK;
+    if ((mod & InputEvent.META_MASK) != 0)
+      mod |= InputEvent.META_DOWN_MASK;
+    if ((mod & InputEvent.ALT_MASK) != 0)
+      mod |= InputEvent.ALT_DOWN_MASK;
+    if ((mod & InputEvent.BUTTON1_MASK) != 0)
+      mod |= InputEvent.BUTTON1_DOWN_MASK;
+    if ((mod & InputEvent.ALT_GRAPH_MASK) != 0)
+      mod |= InputEvent.ALT_GRAPH_DOWN_MASK;
+    return mod & ~OLD_MASK;
+  }
+
+  /**
+   * Converts the new style modifiers (0xffffffc0) to the old style (0x3f).
+   *
+   * @param mod the modifiers to convert
+   * @return the adjusted modifiers
+   */
+  public static int revert(int mod)
+  {
+    if ((mod & InputEvent.SHIFT_DOWN_MASK) != 0)
+      mod |= InputEvent.SHIFT_MASK;
+    if ((mod & InputEvent.CTRL_DOWN_MASK) != 0)
+      mod |= InputEvent.CTRL_MASK;
+    if ((mod & InputEvent.META_DOWN_MASK) != 0)
+      mod |= InputEvent.META_MASK;
+    if ((mod & InputEvent.ALT_DOWN_MASK) != 0)
+      mod |= InputEvent.ALT_MASK;
+    if ((mod & InputEvent.ALT_GRAPH_DOWN_MASK) != 0)
+      mod |= InputEvent.ALT_GRAPH_MASK;
+    if ((mod & InputEvent.BUTTON1_DOWN_MASK) != 0)
+      mod |= InputEvent.BUTTON1_MASK;
+    return mod & OLD_MASK;
+  }
+} // class EventModifier