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	key.c - spoon - set dwm status
	git clone git://git.codemadness.org/spoon
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	key.c (1019B)
	---
	1 #include <err.h>
	2 #include <stdio.h>
	3
	4 #include <X11/keysym.h>
	5 #include <X11/Xlib.h>
	6
	7 #include "types.h"
	8 #include "util.h"
	9
	10 int
	11 keyread(void arg, char buf, size_t len)
	12 {
	13 Display *dpy;
	14 XModifierKeymap *map;
	15 KeyCode keycode;
	16 Window w1, w2;
	17 int i1, i2, i3, i4;
	18 unsigned modmask;
	19 unsigned keymask;
	20 struct keyarg *key = arg;
	21 int on;
	22 int i;
	23
	24 dpy = XOpenDisplay(NULL);
	25 if (dpy == NULL) {
	26 warnx("cannot open display");
	27 return -1;
	28 }
	29 keycode = XKeysymToKeycode(dpy, key->sym);
	30 if (keycode == NoSymbol) {
	31 warnx("no key code for this symbol");
	32 XCloseDisplay(dpy);
	33 return -1;
	34 }
	35 map = XGetModifierMapping(dpy);
	36 for (i = 0; i < 8; i++)
	37 if (map->modifiermap[map->max_keypermod * i] == keycode)
	38 keymask = 1U << i;
	39 XFreeModifiermap(map);
	40 XQueryPointer(dpy, DefaultRootWindow(dpy),
	41 &w1, &w2, &i1, &i2, &i3, &i4, &modmask);
	42 XCloseDisplay(dpy);
	43 on = (keymask & modmask) != 0;
	44 DPRINTF_D(on);
	45 if (on)
	46 snprintf(buf, len, "%s", key->on);
	47 else
	48 snprintf(buf, len, "%s", key->off);
	49 return 0;
	50 }