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/* See LICENSE for more info
sxwm is a user-friendly, easily configurable yet powerful
tiling window manager inspired by window managers such as
DWM and i3
The userconfig is designed to be as user-friendly as
possible, and I hope it is easy to configure even without
knowledge of C or programming, although most people who
will use this will probably be programmers :)
*/// (C) Abhinav Prasai 2025
#include <err.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/XKBlib.h>
#include "defs.h"
typedef void (*EventHandler)(XEvent *);
static void hdl_dummy(XEvent *xev);
static void hdl_keypress(XEvent *xev);
static void other_wm(void);
static int other_wm_err(Display *dpy, XErrorEvent *ee);
static void quit(void);
static void run(void);
static void setup(void);
static void spawn(const char **cmd);
static int xerr(Display *dpy, XErrorEvent *ee);
static void xev_case(XEvent *xev);
static Client clients[MAXCLIENTS] = {0};
static EventHandler evtable[LASTEvent];
static Display *dpy;
static Window root;
#include "usercfg.h"
static void
hdl_dummy(XEvent *xev){}
static void
hdl_keypress(XEvent *xev)
{
KeySym keysym;
XKeyEvent *ev = &xev->xkey;
unsigned int modifiers;
modifiers = ev->state;
keysym = XkbKeycodeToKeysym(dpy, ev->keycode, 0, 0);
int lenbindings = sizeof(binds) / sizeof(binds[0]);
for (int i = 0; i < lenbindings; ++i) {
if (keysym == binds[i].keysym && modifiers == binds[i].mods) {
if (binds[i].is_func)
binds[i].action.fn();
else
spawn(binds[i].action.cmd);
return;
}
}
}
static void
other_wm(void)
{
XSetErrorHandler(other_wm_err);
XChangeWindowAttributes(dpy, root, CWEventMask,
&(XSetWindowAttributes){.event_mask = SubstructureRedirectMask});
XSync(dpy, False);
XSetErrorHandler(xerr);
XSync(dpy, False);
}
static int
other_wm_err(Display *dpy, XErrorEvent *ee)
{
errx(0, "sxwm: can't start because another window manager is already running");
return 0;
if (dpy && ee) return 0;
}
static void
quit(void)
{
errx(0, "sxwm: quitting...");
}
static void
run(void)
{
XEvent xev;
for (;;) {
XNextEvent(dpy, &xev);
xev_case(&xev);
}
}
static void
setup(void)
{
dpy = XOpenDisplay(NULL);
if (dpy == 0)
errx(0, "sxwm: can't open display.");
root = XDefaultRootWindow(dpy);
other_wm();
XSelectInput(dpy, root,
SubstructureRedirectMask | KeyPressMask | KeyReleaseMask
);
for (int i = 0; i < LASTEvent; ++i)
evtable[i] = hdl_dummy;
evtable[KeyPress] = hdl_keypress;
}
static void
spawn(const char **cmd)
{
if (!cmd) return;
printf("sxwm: attempting to spawn: %s\n", cmd[0]);
pid_t pid = fork();
if (pid == 0) {
if (dpy)
close(ConnectionNumber(dpy));
setsid();
execvp(cmd[0], (char *const*)cmd);
errx(1, "sxwm: execvp '%s' failed\n", cmd[0]);
} else if (pid < 0) {
fprintf(stderr, "sxwm: failed to fork process\n");
}
}
static int
xerr(Display *dpy, XErrorEvent *ee)
{
fprintf(stderr, "sxwm: fatal error\nrequest code:%d\nerror code:%d",
ee->request_code, ee->error_code);
return 0;
if (dpy && ee) return 0;
}
static void
xev_case(XEvent *xev)
{
if (xev->type >= 0 && xev->type < LASTEvent)
evtable[xev->type](xev);
else
printf("sxwm: invalid event type: %d\n", xev->type);
}
int
main(int ac, char **av)
{
if (ac > 1) {
if (strcmp(av[1], "-v") == 0 || strcmp(av[1], "--version") == 0)
errx(0, "%s\n%s\n%s", SXWM_VERSION, SXWM_AUTHOR, SXWM_LICINFO);
else
errx(0, "usage:\n[-v || --version]: See the version of sxwm");
}
setup();
run();
return 0;
}
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