From 59b09576b934c8837a90312fc8e7723640733172 Mon Sep 17 00:00:00 2001
From: "Devin J. Pohly" <djpohly@gmail.com>
Date: Thu, 23 Apr 2020 00:38:09 -0500
Subject: restrict focusnext to the same monitor

---
 dwl.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/dwl.c b/dwl.c
index 56c2d49..8add044 100644
--- a/dwl.c
+++ b/dwl.c
@@ -411,15 +411,18 @@ focus(Client *c, struct wlr_surface *surface)
 void
 focusnext(const Arg *arg)
 {
+	/* Focus the client on the selected monitor which comes first in tiling
+	 * order after the currently selected client */
 	Client *sel = selclient();
 	if (!sel)
 		return;
-	/* Find the selected client (top of fstack) and focus the client
-	 * following it in tiling order */
-	Client *c = wl_container_of(sel->link.next, c, link);
-	/* Skip the sentinel node if we wrap around the end of the list */
-	if (&c->link == &clients)
-		c = wl_container_of(c->link.next, c, link);
+	Client *c;
+	wl_list_for_each(c, &sel->link, link) {
+		if (&c->link == &clients)
+			continue;  /* wrap past the sentinel node */
+		if (VISIBLEON(c, selmon))
+			break;  /* found it */
+	}
 	focus(c, c->xdg_surface->surface);
 }
 
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