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	keymap.c - slstatus - status monitor
	git clone git://git.suckless.org/slstatus
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	---
	keymap.c (1869B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <ctype.h>
	3 #include <stdlib.h>
	4 #include <string.h>
	5 #include <X11/XKBlib.h>
	6 #include <X11/Xlib.h>
	7
	8 #include "../slstatus.h"
	9 #include "../util.h"
	10
	11 static int
	12 valid_layout_or_variant(char *sym)
	13 {
	14 size_t i;
	15 /* invalid symbols from xkb rules config */
	16 static const char *invalid[] = { "evdev", "inet", "pc", "base" };
	17
	18 for (i = 0; i < LEN(invalid); i++)
	19 if (!strncmp(sym, invalid[i], strlen(invalid[i])))
	20 return 0;
	21
	22 return 1;
	23 }
	24
	25 static char *
	26 get_layout(char *syms, int grp_num)
	27 {
	28 char tok, layout;
	29 int grp;
	30
	31 layout = NULL;
	32 tok = strtok(syms, "+:_");
	33 for (grp = 0; tok && grp <= grp_num; tok = strtok(NULL, "+:_")) {
	34 if (!valid_layout_or_variant(tok)) {
	35 continue;
	36 } else if (strlen(tok) == 1 && isdigit(tok[0])) {
	37 /* ignore :2, :3, :4 (additional layout groups) …
	38 continue;
	39 }
	40 layout = tok;
	41 grp++;
	42 }
	43
	44 return layout;
	45 }
	46
	47 const char *
	48 keymap(const char *unused)
	49 {
	50 Display *dpy;
	51 XkbDescRec *desc;
	52 XkbStateRec state;
	53 char *symbols;
	54 const char *layout;
	55
	56 layout = NULL;
	57
	58 if (!(dpy = XOpenDisplay(NULL))) {
	59 warn("XOpenDisplay: Failed to open display");
	60 return NULL;
	61 }
	62 if (!(desc = XkbAllocKeyboard())) {
	63 warn("XkbAllocKeyboard: Failed to allocate keyboard");
	64 goto end;
	65 }
	66 if (XkbGetNames(dpy, XkbSymbolsNameMask, desc)) {
	67 warn("XkbGetNames: Failed to retrieve key symbols");
	68 goto end;
	69 }
	70 if (XkbGetState(dpy, XkbUseCoreKbd, &state)) {
	71 warn("XkbGetState: Failed to retrieve keyboard state");
	72 goto end;
	73 }
	74 if (!(symbols = XGetAtomName(dpy, desc->names->symbols))) {
	75 warn("XGetAtomName: Failed to get atom name");
	76 goto end;
	77 }
	78 layout = bprintf("%s", get_layout(symbols, state.group));
	79 XFree(symbols);
	80 end:
	81 XkbFreeKeyboard(desc, XkbSymbolsNameMask, 1);
	82 if (XCloseDisplay(dpy))
	83 warn("XCloseDisplay: Failed to close display");
	84
	85 return layout;
	86 }