From eda254b64f26b0dec252519b530cbc9fd59c2dee Mon Sep 17 00:00:00 2001
From: Alexander Bocken <alexander@bocken.org>
Date: Mon, 10 May 2021 17:24:46 +0200
Subject: [PATCH] prevent screen overflow with firstwindowoffset

---
 dwm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dwm.c b/dwm.c
index 1ed4bbf..a6774db 100644
--- a/dwm.c
+++ b/dwm.c
@@ -2509,10 +2509,10 @@ centeredfirstwindow(Monitor *m)
 
 	/* initialize nmaster area */
 	if (m->ww > m->wh) {
-		mw = m->nmaster ? m->ww * (m->mfact + firstwindowoffset) : 0;
+		mw = m->nmaster ? m->ww * MIN(1.0, (m->mfact + firstwindowoffset)) : 0;
 		mh = m->nmaster ? m->wh : 0;
 	} else {
-		mh = m->nmaster ? m->wh * (m->mfact + firstwindowoffset) : 0;
+		mh = m->nmaster ? m->wh * MIN(1.0, (m->mfact + firstwindowoffset)) : 0;
 		mw = m->nmaster ? m->ww : 0;
 	}
 	mx = mxo = (m->ww - mw) / 2;