943b42de05
Adding a new keymap component that will indicate the current keyboard layout (language) and variant if any was set. I use the standard X11 XKB APIs to retrieve and parse the xkb_symbols set with setxkbmap.
97 lines
1.9 KiB
C
97 lines
1.9 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <X11/XKBlib.h>
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#include <X11/Xlib.h>
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#include "../util.h"
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#define LAYOUT_MAX 256
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/* Given a token (sym) from the xkb_symbols string
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* check whether it is a valid layout/variant. The
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* EXCLUDES array contains invalid layouts/variants
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* that are part of the xkb rules config.
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*/
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static int
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IsLayoutOrVariant(char *sym)
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{
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static const char* EXCLUDES[] = { "evdev", "inet", "pc", "base" };
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size_t i;
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for (i = 0; i < sizeof(EXCLUDES)/sizeof(EXCLUDES[0]); ++i)
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if (strstr(sym, EXCLUDES[i])) {
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return 0;
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}
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return 1;
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}
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static void
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GetKeyLayout(char *syms, char layout[], int groupNum)
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{
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char *token, *copy, *delims;
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int group;
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delims = "+:";
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group = 0;
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copy = strdup(syms);
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token = strtok(copy, delims);
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while (token != NULL && group <= groupNum) {
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/* Ignore :2,:3,:4 which represent additional layout
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* groups
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*/
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if (IsLayoutOrVariant(token)
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&& !(strlen(token) == 1 && isdigit(token[0]))) {
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strncpy (layout, token, LAYOUT_MAX);
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group++;
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}
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token = strtok(NULL,delims);
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}
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free(copy);
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}
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const char *
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keymap(void)
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{
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static char layout[LAYOUT_MAX];
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Display *dpy;
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char *symbols = NULL;
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XkbDescRec* desc = NULL;
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memset(layout, '\0', LAYOUT_MAX);
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if (!(dpy = XOpenDisplay(NULL))) {
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warn("XOpenDisplay: Failed to open display");
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return NULL;
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}
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;
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if (!(desc = XkbAllocKeyboard())) {
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warn("XkbAllocKeyboard: failed to allocate keyboard");
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XCloseDisplay(dpy);
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return NULL;
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}
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XkbGetNames(dpy, XkbSymbolsNameMask, desc);
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if (desc->names) {
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XkbStateRec state;
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XkbGetState(dpy, XkbUseCoreKbd, &state);
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symbols = XGetAtomName(dpy, desc->names->symbols);
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GetKeyLayout(symbols, layout, state.group);
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XFree(symbols);
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} else {
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warn("XkbGetNames: failed to retrieve symbols for keys");
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return NULL;
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}
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XkbFreeKeyboard(desc, XkbSymbolsNameMask, 1);
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XCloseDisplay(dpy);
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return layout;
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}
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