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#ifndef lint
static char *rcsid = "$Id: parsekey.c,v 1.1 1994/05/16 05:42:30 ishisone Rel $";
#endif
/*-
* Copyright (c) 1991, 1994 Software Research Associates, Inc.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Software Research Associates not be
* used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. Software Research
* Associates makes no representations about the suitability of this software
* for any purpose. It is provided "as is" without express or implied
* warranty.
*
* Author: Makoto Ishisone, Software Research Associates, Inc., Japan
*/
#include <X11/Xos.h>
#include <X11/IntrinsicP.h>
#include "ParseKey.h"
/*- parseModifiers: parse modifier list -*/
static void
parseModifiers(s, modp, chkmodp)
String s;
long *modp; /* RETURN: modifiers which must be set */
long *chkmodp; /* RETURN: modifiers to be checked */
{
String p;
int i;
int c;
static struct _moddesc_ {
String modname; /* modifier name */
long modmask; /* modifier mask */
} mods[] = {
{ "Shift", ShiftMask },
{ "Lock", LockMask },
{ "Ctrl", ControlMask },
{ "Meta", Mod1Mask },
{ "Alt", Mod1Mask },
{ "Mod1", Mod1Mask },
{ "Mod2", Mod2Mask },
{ "Mod3", Mod3Mask },
{ "Mod4", Mod4Mask },
{ "c", ControlMask },
{ "s", ShiftMask },
{ "l", LockMask },
{ "m", Mod1Mask },
{ "a", Mod1Mask },
};
*modp = *chkmodp = 0L;
#define SKIPBLANK \
while ((c = *s) == ' ' || c == '\t' || c == '\n') s++; \
if (c == '\0') return;
#define SEARCHBLANK \
p = s; while ((c = *p) != '\0' && c != ' ' && c != '\t' && c != '\n') p++;
while (*s != '\0') {
int tilde = 0;
SKIPBLANK;
if (c == '~') {
tilde = 1;
s++;
SKIPBLANK;
}
SEARCHBLANK;
*p = '\0';
for (i = 0; i < XtNumber(mods); i++) {
if (!strcmp(s, mods[i].modname)) {
*chkmodp |= mods[i].modmask;
if (!tilde) *modp |= mods[i].modmask;
break;
}
}
if (c == '\0') break;
s = p + 1;
}
#undef SKIPBLANK
#undef SEARCHBLANK
}
/*- mystrstr: not-so-good implementaion of ANSI strstr() -*/
static char *
mystrstr(s1, s2)
char *s1;
char *s2;
{
register char *p, *q;
while (*(p = s1++) != '\0') {
q = s2;
do {
if (*q == '\0') return s1 - 1;
} while (*p++ == *q++);
}
return NULL;
}
/*
* Public function
*/
int
ParseKeyEvent(s, keysymp, modp, chkmodp)
String s; /* IN: keyevent description */
KeySym *keysymp; /* OUT: keysym */
long *modp; /* OUT: mask of modifiers which must be pressed */
long *chkmodp; /* OUT: mask of modifiers of interest */
{
String key;
String p;
KeySym keysym;
/*
* keyevent description (stored in argument 's') must be of the
* following format (subset of Xt translation table syntax):
* modifier-list<Key>keysym
* modifier-list is a combination of:
* Ctrl, Shift, Lock, Meta, Alt, Mod1, Mod2, Mod3, Mod4, Mod5
* if '~' is prepended before a modifier, it means the modifier key should
* not be pressed.
*/
/* find "<Key>" */
if ((p = mystrstr(s, "<Key>")) != NULL) {
key = p + 5; /* p + strlen("<Key>") */
} else if ((p = mystrstr(s, "<KeyPress>")) != NULL) {
key = p + 10; /* p + strlen("<KeyPress>") */
} else if ((p = mystrstr(s, "<KeyDown>")) != NULL) {
key = p + 9; /* p + strlen("<KeyDown>") */
} else {
return 0;
}
*p = '\0';
while (*key == ' ' || *key == '\t') key++;
p = key;
while (*p != '\0' && *p != ' ' && *p != '\t') p++;
*p = '\0';
/* get modifier mask */
parseModifiers(s, modp, chkmodp);
/* get keycode */
if ((keysym = XStringToKeysym(key)) == NoSymbol) return 0;
*keysymp = keysym;
return 1;
}
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