mirror of git://gcc.gnu.org/git/gcc.git
108 lines
3.7 KiB
Java
108 lines
3.7 KiB
Java
/* EventModifier.java -- tool for converting modifier bits to 1.4 syle
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.awt;
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import java.awt.event.InputEvent;
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public class EventModifier
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{
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/** The mask for old events. */
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public static final int OLD_MASK = 0x3f;
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/** The mask for new events. */
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public static final int NEW_MASK = 0x3fc0;
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/**
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* Non-instantiable.
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*/
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private EventModifier()
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{
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throw new InternalError();
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}
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/**
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* Converts the old style modifiers (0x3f) to the new style (0xffffffc0).
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*
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* @param mod the modifiers to convert
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* @return the adjusted modifiers
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*/
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public static int extend(int mod)
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{
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// Favor what we hope will be the common case.
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if ((mod & OLD_MASK) == 0)
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return mod;
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if ((mod & InputEvent.SHIFT_MASK) != 0)
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mod |= InputEvent.SHIFT_DOWN_MASK;
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if ((mod & InputEvent.CTRL_MASK) != 0)
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mod |= InputEvent.CTRL_DOWN_MASK;
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if ((mod & InputEvent.META_MASK) != 0)
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mod |= InputEvent.META_DOWN_MASK;
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if ((mod & InputEvent.ALT_MASK) != 0)
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mod |= InputEvent.ALT_DOWN_MASK;
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if ((mod & InputEvent.BUTTON1_MASK) != 0)
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mod |= InputEvent.BUTTON1_DOWN_MASK;
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if ((mod & InputEvent.ALT_GRAPH_MASK) != 0)
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mod |= InputEvent.ALT_GRAPH_DOWN_MASK;
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return mod & ~OLD_MASK;
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}
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/**
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* Converts the new style modifiers (0xffffffc0) to the old style (0x3f).
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*
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* @param mod the modifiers to convert
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* @return the adjusted modifiers
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*/
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public static int revert(int mod)
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{
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if ((mod & InputEvent.SHIFT_DOWN_MASK) != 0)
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mod |= InputEvent.SHIFT_MASK;
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if ((mod & InputEvent.CTRL_DOWN_MASK) != 0)
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mod |= InputEvent.CTRL_MASK;
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if ((mod & InputEvent.META_DOWN_MASK) != 0)
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mod |= InputEvent.META_MASK;
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if ((mod & InputEvent.ALT_DOWN_MASK) != 0)
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mod |= InputEvent.ALT_MASK;
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if ((mod & InputEvent.ALT_GRAPH_DOWN_MASK) != 0)
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mod |= InputEvent.ALT_GRAPH_MASK;
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if ((mod & InputEvent.BUTTON1_DOWN_MASK) != 0)
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mod |= InputEvent.BUTTON1_MASK;
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return mod & OLD_MASK;
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}
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} // class EventModifier
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