| 1 | /* EventModifier.java -- tool for converting modifier bits to 1.4 syle
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| 2 | Copyright (C) 2002 Free Software Foundation, Inc.
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| 3 |
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| 4 | This file is part of GNU Classpath.
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| 5 |
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| 6 | GNU Classpath is free software; you can redistribute it and/or modify
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| 7 | it under the terms of the GNU General Public License as published by
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| 8 | the Free Software Foundation; either version 2, or (at your option)
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| 9 | any later version.
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| 10 |
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| 11 | GNU Classpath is distributed in the hope that it will be useful, but
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| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU General Public License
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| 17 | along with GNU Classpath; see the file COPYING. If not, write to the
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| 18 | Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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| 19 | 02111-1307 USA.
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| 20 |
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| 21 | Linking this library statically or dynamically with other modules is
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| 22 | making a combined work based on this library. Thus, the terms and
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| 23 | conditions of the GNU General Public License cover the whole
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| 24 | combination.
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| 25 |
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| 26 | As a special exception, the copyright holders of this library give you
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| 27 | permission to link this library with independent modules to produce an
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| 28 | executable, regardless of the license terms of these independent
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| 29 | modules, and to copy and distribute the resulting executable under
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| 30 | terms of your choice, provided that you also meet, for each linked
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| 31 | independent module, the terms and conditions of the license of that
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| 32 | module. An independent module is a module which is not derived from
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| 33 | or based on this library. If you modify this library, you may extend
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| 34 | this exception to your version of the library, but you are not
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| 35 | obligated to do so. If you do not wish to do so, delete this
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| 36 | exception statement from your version. */
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| 37 |
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| 38 |
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| 39 | package gnu.java.awt;
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| 40 |
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| 41 | import java.awt.event.InputEvent;
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| 42 |
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| 43 | public class EventModifier
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| 44 | {
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| 45 | /** The mask for old events. */
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| 46 | public static final int OLD_MASK = 0x3f;
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| 47 |
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| 48 | /** The mask for new events. */
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| 49 | public static final int NEW_MASK = 0x3fc0;
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| 50 |
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| 51 | /**
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| 52 | * Non-instantiable.
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| 53 | */
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| 54 | private EventModifier()
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| 55 | {
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| 56 | throw new InternalError();
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| 57 | }
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| 58 |
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| 59 | /**
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| 60 | * Converts the old style modifiers (0x3f) to the new style (0xffffffc0).
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| 61 | *
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| 62 | * @param mod the modifiers to convert
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| 63 | * @return the adjusted modifiers
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| 64 | */
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| 65 | public static int extend(int mod)
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| 66 | {
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| 67 | // Favor what we hope will be the common case.
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| 68 | if ((mod & OLD_MASK) == 0)
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| 69 | return mod;
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| 70 | if ((mod & InputEvent.SHIFT_MASK) != 0)
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| 71 | mod |= InputEvent.SHIFT_DOWN_MASK;
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| 72 | if ((mod & InputEvent.CTRL_MASK) != 0)
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| 73 | mod |= InputEvent.CTRL_DOWN_MASK;
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| 74 | if ((mod & InputEvent.META_MASK) != 0)
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| 75 | mod |= InputEvent.META_DOWN_MASK;
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| 76 | if ((mod & InputEvent.ALT_MASK) != 0)
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| 77 | mod |= InputEvent.ALT_DOWN_MASK;
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| 78 | if ((mod & InputEvent.BUTTON1_MASK) != 0)
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| 79 | mod |= InputEvent.BUTTON1_DOWN_MASK;
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| 80 | if ((mod & InputEvent.ALT_GRAPH_MASK) != 0)
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| 81 | mod |= InputEvent.ALT_GRAPH_DOWN_MASK;
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| 82 | return mod & ~OLD_MASK;
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| 83 | }
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| 84 |
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| 85 | /**
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| 86 | * Converts the new style modifiers (0xffffffc0) to the old style (0x3f).
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| 87 | *
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| 88 | * @param mod the modifiers to convert
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| 89 | * @return the adjusted modifiers
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| 90 | */
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| 91 | public static int revert(int mod)
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| 92 | {
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| 93 | if ((mod & InputEvent.SHIFT_DOWN_MASK) != 0)
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| 94 | mod |= InputEvent.SHIFT_MASK;
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| 95 | if ((mod & InputEvent.CTRL_DOWN_MASK) != 0)
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| 96 | mod |= InputEvent.CTRL_MASK;
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| 97 | if ((mod & InputEvent.META_DOWN_MASK) != 0)
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| 98 | mod |= InputEvent.META_MASK;
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| 99 | if ((mod & InputEvent.ALT_DOWN_MASK) != 0)
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| 100 | mod |= InputEvent.ALT_MASK;
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| 101 | if ((mod & InputEvent.ALT_GRAPH_DOWN_MASK) != 0)
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| 102 | mod |= InputEvent.ALT_GRAPH_MASK;
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| 103 | if ((mod & InputEvent.BUTTON1_DOWN_MASK) != 0)
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| 104 | mod |= InputEvent.BUTTON1_MASK;
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| 105 | return mod & OLD_MASK;
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| 106 | }
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| 107 | } // class EventModifier
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