| /* 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 |