[hackers] [slstatus] Add keymap component || Michael Buch

From: <git_AT_suckless.org>
Date: Wed, 23 May 2018 10:11:21 +0200 (CEST)

commit 943b42de05cc3328ea74b0d9f527f17e1fcf47e7
Author: Michael Buch <michaelbuch12_AT_gmail.com>
AuthorDate: Wed May 23 07:16:30 2018 +0100
Commit: Aaron Marcher <me_AT_drkhsh.at>
CommitDate: Wed May 23 10:09:13 2018 +0200

    Add keymap component
    
    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.

diff --git a/Makefile b/Makefile
index 8e18969..7ed7099 100644
--- a/Makefile
+++ b/Makefile
_AT_@ -16,6 +16,7 @@ COM =\
         components/ip\
         components/kernel_release\
         components/keyboard_indicators\
+ components/keymap\
         components/load_avg\
         components/netspeeds\
         components/num_files\
diff --git a/components/keymap.c b/components/keymap.c
new file mode 100644
index 0000000..358a2ca
--- /dev/null
+++ b/components/keymap.c
_AT_@ -0,0 +1,97 @@
+/* See LICENSE file for copyright and license details. */
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/XKBlib.h>
+#include <X11/Xlib.h>
+
+#include "../util.h"
+
+#define LAYOUT_MAX 256
+
+/* Given a token (sym) from the xkb_symbols string
+ * check whether it is a valid layout/variant. The
+ * EXCLUDES array contains invalid layouts/variants
+ * that are part of the xkb rules config.
+ */
+static int
+IsLayoutOrVariant(char *sym)
+{
+ static const char* EXCLUDES[] = { "evdev", "inet", "pc", "base" };
+
+ size_t i;
+ for (i = 0; i < sizeof(EXCLUDES)/sizeof(EXCLUDES[0]); ++i)
+ if (strstr(sym, EXCLUDES[i])) {
+ return 0;
+ }
+
+ return 1;
+}
+
+static void
+GetKeyLayout(char *syms, char layout[], int groupNum)
+{
+ char *token, *copy, *delims;
+ int group;
+
+ delims = "+:";
+ group = 0;
+ copy = strdup(syms);
+ token = strtok(copy, delims);
+ while (token != NULL && group <= groupNum) {
+ /* Ignore :2,:3,:4 which represent additional layout
+ * groups
+ */
+ if (IsLayoutOrVariant(token)
+ && !(strlen(token) == 1 && isdigit(token[0]))) {
+ strncpy (layout, token, LAYOUT_MAX);
+ group++;
+ }
+
+ token = strtok(NULL,delims);
+ }
+
+ free(copy);
+}
+
+const char *
+keymap(void)
+{
+ static char layout[LAYOUT_MAX];
+
+ Display *dpy;
+ char *symbols = NULL;
+ XkbDescRec* desc = NULL;
+
+ memset(layout, '\0', LAYOUT_MAX);
+
+ if (!(dpy = XOpenDisplay(NULL))) {
+ warn("XOpenDisplay: Failed to open display");
+ return NULL;
+ }
+
+ ;
+ if (!(desc = XkbAllocKeyboard())) {
+ warn("XkbAllocKeyboard: failed to allocate keyboard");
+ XCloseDisplay(dpy);
+ return NULL;
+ }
+
+ XkbGetNames(dpy, XkbSymbolsNameMask, desc);
+ if (desc->names) {
+ XkbStateRec state;
+ XkbGetState(dpy, XkbUseCoreKbd, &state);
+
+ symbols = XGetAtomName(dpy, desc->names->symbols);
+ GetKeyLayout(symbols, layout, state.group);
+ XFree(symbols);
+ } else {
+ warn("XkbGetNames: failed to retrieve symbols for keys");
+ return NULL;
+ }
+
+ XkbFreeKeyboard(desc, XkbSymbolsNameMask, 1);
+ XCloseDisplay(dpy);
+
+ return layout;
+}
diff --git a/config.def.h b/config.def.h
index 45320a3..75debe5 100644
--- a/config.def.h
+++ b/config.def.h
_AT_@ -34,6 +34,8 @@ static const char unknown_str[] = "n/a";
  * ipv6 IPv6 address interface name (eth0)
  * kernel_release `uname -r` NULL
  * keyboard_indicators caps/num lock indicators NULL
+ * keymap layout (variant) of current NULL
+ * keymap
  * load_avg load average NULL
  * netspeed_rx receive network speed interface name (wlan0)
  * netspeed_tx transfer network speed interface name (wlan0)
diff --git a/slstatus.h b/slstatus.h
index a18b881..6112e7e 100644
--- a/slstatus.h
+++ b/slstatus.h
_AT_@ -37,6 +37,9 @@ const char *kernel_release(void);
 /* keyboard_indicators */
 const char *keyboard_indicators(void);
 
+/* keymap */
+const char *keymap(void);
+
 /* load_avg */
 const char *load_avg(const char *);
 
Received on Wed May 23 2018 - 10:11:21 CEST