[hackers] [dwm] Do not allow focus to drift from fullscreen client via focusstack() || Chris Down

[git]

commit 67d76bdc68102df976177de351f65329d8683064
Author:     Chris Down <ch...@chrisdown.name>
AuthorDate: Thu Jul 2 20:18:30 2020 +0100
Commit:     Hiltjo Posthuma <hil...@codemadness.org>
CommitDate: Mon Mar 29 19:16:27 2021 +0200

    Do not allow focus to drift from fullscreen client via focusstack()
    
    It generally doesn't make much sense to allow focusstack() to navigate
    away from the selected fullscreen client, as you can't even see which
    client you're selecting behind it.
    
    I have had this up for a while on the wiki as a separate patch[0], but
    it seems reasonable to avoid this behaviour in dwm mainline, since I'm
    struggling to think of any reason to navigate away from a fullscreen
    client other than a mistake.
    
    0: https://dwm.suckless.org/patches/alwaysfullscreen/

diff --git a/dwm.c b/dwm.c
index 664c527..b0b3466 100644
--- a/dwm.c
+++ b/dwm.c
@@ -835,7 +835,7 @@ focusstack(const Arg *arg)
 {
        Client *c = NULL, *i;
 
-       if (!selmon->sel)
+       if (!selmon->sel || selmon->sel->isfullscreen)
                return;
        if (arg->i > 0) {
                for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);