commit 67d76bdc68102df976177de351f65329d8683064
from: Chris Down <chris@chrisdown.name>
via: Hiltjo Posthuma <hiltjo@codemadness.org>
date: Mon Mar 29 17:16:27 2021 UTC

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/

commit - 61bb8b2241d4db08bea4261c82e27cd9797099e7
commit + 67d76bdc68102df976177de351f65329d8683064
blob - 664c527f21f852967ba41739fda440429277df84
blob + b0b3466881b84872a6b261cc1ed42afed08ac3bd
--- dwm.c
+++ 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);