From 16e537884f404572272200ae70cefdf8562ff939 Mon Sep 17 00:00:00 2001
From: bakkeby <bakkeby@gmail.com>
Date: Wed, 27 Jan 2021 14:55:14 +0100
Subject: [PATCH] Center clients within their allocated tile based on size
 hints

---
 dwm.c | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/dwm.c b/dwm.c
index 4465af1..d1c84cd 100644
--- a/dwm.c
+++ b/dwm.c
@@ -190,6 +190,7 @@ static void quit(const Arg *arg);
 static Monitor *recttomon(int x, int y, int w, int h);
 static void resize(Client *c, int x, int y, int w, int h, int interact);
 static void resizeclient(Client *c, int x, int y, int w, int h);
+static void resizeclientpad(Client *c, int x, int y, int w, int h, int xpad, int ypad);
 static void resizemouse(const Arg *arg);
 static void restack(Monitor *m);
 static void run(void);
@@ -1229,6 +1230,7 @@ propertynotify(XEvent *e)
 			break;
 		case XA_WM_NORMAL_HINTS:
 			updatesizehints(c);
+			arrangemon(c->mon);
 			break;
 		case XA_WM_HINTS:
 			updatewmhints(c);
@@ -1268,19 +1270,41 @@ recttomon(int x, int y, int w, int h)
 void
 resize(Client *c, int x, int y, int w, int h, int interact)
 {
-	if (applysizehints(c, &x, &y, &w, &h, interact))
-		resizeclient(c, x, y, w, h);
+	int xh = x, yh = y, wh = w, hh = h, a;
+
+	a = applysizehints(c, &xh, &yh, &wh, &hh, interact);
+	if (a || w != wh || h != hh)
+		resizeclientpad(c, xh, yh, wh, hh, w, h);
 }
 
+/* This wrapper is just for compatibility with other patches that may call resizeclient */
 void
 resizeclient(Client *c, int x, int y, int w, int h)
 {
-	XWindowChanges wc;
+	resizeclientpad(c, x, y, w, h, w, h);
+}
 
+/* This is essentially the resizeclient function renamed with two
+ * additional parameters, tw and th (for tile width and height). */
+void
+resizeclientpad(Client *c, int x, int y, int w, int h, int tw, int th)
+{
+	XWindowChanges wc;
 	c->oldx = c->x; c->x = wc.x = x;
 	c->oldy = c->y; c->y = wc.y = y;
 	c->oldw = c->w; c->w = wc.width = w;
 	c->oldh = c->h; c->h = wc.height = h;
+	if (!c->isfloating) {
+		if (w != tw) {
+			wc.x += (tw - w) / 2;
+			c->w = tw;
+		}
+		if (h != th) {
+			wc.y += (th - h) / 2;
+			c->h = th;
+		}
+	}
+
 	wc.border_width = c->bw;
 	XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
 	configure(c);
-- 
2.19.1