`_NET_WM_STATE_SKIP_TASKBAR` atom not detected if `_NET_WM_STATE` contains more than one atoms

[orestisfl]

`_NET_WM_STATE_SKIP_TASKBAR` atom not detected if `_NET_WM_STATE` contains more than one atoms

[sagb]

Are you sure xprop accepts atoms separated by coma? Can you try instead:

wmctrl -i -r <win_id> -b add,skip_taskbar
wmctrl -i -r <win_id> -b add,maximized_vert

[orestisfl]

Well, to begin with, i3 does not support setting these atoms (not to mention that it doesn't support setting multiple atoms at once: i3/i3#5910)

[orestisfl]

Seems to work with this:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <xcb/xcb.h>

xcb_connection_t *conn;

static void xcb_add_property_atom(xcb_window_t window, xcb_atom_t property, xcb_atom_t atom) {
    xcb_change_property(conn, XCB_PROP_MODE_APPEND, window, property, XCB_ATOM_ATOM, 32, 1, (uint32_t[]){atom});
}

static xcb_atom_t add_atom(char *name) {
    xcb_intern_atom_cookie_t cookie = xcb_intern_atom(conn, 0, strlen(name), name);
    xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, cookie, NULL);
    if (!reply) {
        return 0;
    }
    printf("The %s atom has ID %u\n", name, reply->atom);
    xcb_atom_t result = reply->atom;
    free(reply);
    return result;
}

int main(int argc, char **argv) {
    if (argc < 2) {
        return 1;
    }
    xcb_window_t window = atoi(argv[1]);

    conn = xcb_connect(NULL, NULL);
    xcb_atom_t state_atom = add_atom("_NET_WM_STATE");
    xcb_atom_t taskbar_atom = add_atom("_NET_WM_STATE_SKIP_TASKBAR");

    xcb_add_property_atom(window, state_atom, taskbar_atom);
    xcb_flush(conn);

    return 0;
}