/*
 * File: status.c
 * Location: https://bgstack15.ddns.net/cgit/keyboard-leds-trayicons/
 * Author: bgstack15
 * Startdate: 2022-09-28-4 13:30
 * SPDX-License-Identifier: GPL-3.0
 * Title: Proof of Concept C utility for polling capslock and numlock
 * Purpose: Demonstrate these can be done in C, with the eventual goal of rewriting keyboard-leds-trayicons entirely in C to avoid the "sleep 0.75" in ps output
 * History:
 * Usage:
 * References:
 *    https://github.com/Cairo-Dock/cairo-dock-plug-ins/blob/master/keyboard-indicator/src/applet-xklavier.c#L124
 *    https://github.com/oco2000/xfce4-kbdleds-plugin/blob/fe753d9d0f8a720a35a32f5f556b8fbead798d20/panel-plugin/xkbleds.c
 * Improvements:
 *    Write main keyboard-led-trayicons logic, which includes parsing config file (libconfig?)
 *    Write pipe connectivity to mktrayicon or integrate it entirely
 * Dependencies: libx11-dev
 */
#include<stdio.h>
#include<string.h>
#include<X11/XKBlib.h>

Display* dpy;

int get_indicator(Display* dpy, char* indicator) {
	// where indicator is one of ["Num Lock", "Caps Lock"]
	Atom lockIndicator = XInternAtom(dpy, indicator, False);
	int st;
	XkbGetNamedIndicator(dpy, lockIndicator, NULL, &st, NULL, NULL);
	return st;
}

int main() {
	dpy = XOpenDisplay( NULL );
	int status_capslock = get_indicator(dpy, "Caps Lock");
	int status_numlock = get_indicator(dpy, "Num Lock");
   printf("Capslock: %d\tNumlock: %d\n",status_capslock,status_numlock);
   printf("done\n");
   return 0;
}