From: Job Snijders <job@openbsd.org>
Subject: cwm(1): add window-snap-center function
To: tech@openbsd.org
Date: Tue, 12 Aug 2025 21:01:52 +0000

This adds 'window-snap-center' to the 'window-snap-*' family of
functions. With this function users can center the window. Thoughts?

Index: calmwm.h
===================================================================
RCS file: /cvs/xenocara/app/cwm/calmwm.h,v
diff -u -p -r1.379 calmwm.h
--- calmwm.h	20 Jul 2023 14:39:34 -0000	1.379
+++ calmwm.h	12 Aug 2025 20:55:19 -0000
@@ -55,6 +55,7 @@
 #define CWM_LEFT		0x0004
 #define CWM_RIGHT		0x0008
 #define CWM_BIGAMOUNT		0x0010
+#define CWM_CENTER		0x0020
 #define CWM_UP_BIG		(CWM_UP | CWM_BIGAMOUNT)
 #define CWM_DOWN_BIG		(CWM_DOWN | CWM_BIGAMOUNT)
 #define CWM_LEFT_BIG		(CWM_LEFT | CWM_BIGAMOUNT)
Index: conf.c
===================================================================
RCS file: /cvs/xenocara/app/cwm/conf.c,v
diff -u -p -r1.256 conf.c
--- conf.c	20 Jul 2023 14:39:34 -0000	1.256
+++ conf.c	12 Aug 2025 20:55:19 -0000
@@ -102,6 +102,7 @@ static const struct {
 	{ FUNC_CC(window-movetogroup-7, client_movetogroup, 7) },
 	{ FUNC_CC(window-movetogroup-8, client_movetogroup, 8) },
 	{ FUNC_CC(window-movetogroup-9, client_movetogroup, 9) },
+	{ FUNC_CC(window-snap-center, client_snap, (CWM_CENTER)) },
 	{ FUNC_CC(window-snap-up, client_snap, (CWM_UP)) },
 	{ FUNC_CC(window-snap-down, client_snap, (CWM_DOWN)) },
 	{ FUNC_CC(window-snap-right, client_snap, (CWM_RIGHT)) },
Index: cwmrc.5
===================================================================
RCS file: /cvs/xenocara/app/cwm/cwmrc.5,v
diff -u -p -r1.78 cwmrc.5
--- cwmrc.5	20 Jul 2023 14:39:34 -0000	1.78
+++ cwmrc.5	12 Aug 2025 20:55:20 -0000
@@ -401,6 +401,8 @@ pixels right.
 Resize window 10 times
 .Ar moveamount
 pixels left.
+.It window-snap-center
+Snap window to center.
 .It window-snap-up
 Snap window to top edge.
 .It window-snap-down
Index: kbfunc.c
===================================================================
RCS file: /cvs/xenocara/app/cwm/kbfunc.c,v
diff -u -p -r1.175 kbfunc.c
--- kbfunc.c	10 Apr 2024 19:38:22 -0000	1.175
+++ kbfunc.c	12 Aug 2025 20:55:20 -0000
@@ -320,6 +320,13 @@ kbfunc_client_snap(void *ctx, struct car
 			    (cc->bwidth * 2);
 			flags &= ~CWM_DOWN;
 		}
+		if (flags & CWM_CENTER) {
+			cc->geom.x = area.x +
+			    (area.w - cc->geom.w - cc->bwidth) / 2;
+			cc->geom.y = area.y +
+			    (area.h - cc->geom.h - cc->bwidth) / 2;
+			flags &= ~CWM_CENTER;
+		}
 	}
 	client_move(cc);
 	client_ptr_inbound(cc, 1);