From 33a7dc3f3602feb8190be16291f6f26194e27720 Mon Sep 17 00:00:00 2001
From: Alex Kotov <kotovalexarian@gmail.com>
Date: Sun, 14 Nov 2021 01:31:51 +0500
Subject: [PATCH] Apply centeredmaster patch
 (dwm-centeredmaster-20160719-56a31dc.diff)

Only centered master layout, without centered master floating layout
---
 config.def.h |  2 ++
 dwm.c        | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)

diff --git a/config.def.h b/config.def.h
index 6e19d79..9393f12 100644
--- a/config.def.h
+++ b/config.def.h
@@ -44,6 +44,7 @@ static const Layout layouts[] = {
 	{ "[]=",      tile },    /* first entry is default */
 	{ "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
+	{ "=[]=",     centeredmaster },
 };
 
 /* key definitions */
@@ -83,6 +84,7 @@ static Key keys[] = {
 	{ MODKEY,                       XK_t,      setlayout,      {.v = &layouts[0]} },
 	{ MODKEY,                       XK_f,      setlayout,      {.v = &layouts[1]} },
 	{ MODKEY,                       XK_m,      setlayout,      {.v = &layouts[2]} },
+	{ MODKEY,                       XK_u,      setlayout,      {.v = &layouts[3]} },
 	{ MODKEY,                       XK_space,  setlayout,      {0} },
 	{ MODKEY|ShiftMask,             XK_space,  togglefloating, {0} },
 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },
diff --git a/dwm.c b/dwm.c
index a791f2f..14a24ee 100644
--- a/dwm.c
+++ b/dwm.c
@@ -173,6 +173,7 @@ static void arrangemon(Monitor *m);
 static void attach(Client *c);
 static void attachstack(Client *c);
 static void buttonpress(XEvent *e);
+static void centeredmaster(Monitor *m);
 static void checkotherwm(void);
 static void cleanup(void);
 static void cleanupmon(Monitor *mon);
@@ -519,6 +520,63 @@ buttonpress(XEvent *e)
 			buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 }
 
+void
+centeredmaster(Monitor *m)
+{
+	unsigned int i, n, h, mw, mx, my, oty, ety, tw, bw;
+	Client *c;
+
+	/* count number of clients in the selected monitor */
+	for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
+	if (n == 0)
+		return;
+
+	if (n == 1)
+		bw = 0;
+	else
+		bw = borderpx;
+
+	/* initialize areas */
+	mw = m->ww;
+	mx = 0;
+	my = 0;
+	tw = mw;
+
+	if (n > m->nmaster) {
+		/* go mfact box in the center if more than nmaster clients */
+		mw = m->nmaster ? m->ww * m->mfact : 0;
+		tw = m->ww - mw;
+
+		if (n - m->nmaster > 1) {
+			/* only one client */
+			mx = (m->ww - mw) / 2;
+			tw = (m->ww - mw) / 2;
+		}
+	}
+
+	oty = 0;
+	ety = 0;
+	for (i = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
+	if (i < m->nmaster) {
+		/* nmaster clients are stacked vertically, in the center
+		 * of the screen */
+		h = (m->wh - my) / (MIN(n, m->nmaster) - i);
+		resize(c, m->wx + mx, m->wy + my, mw - 2*bw, h - 2*bw, bw, 0);
+		my += HEIGHT(c);
+	} else {
+		/* stack clients are stacked vertically */
+		if ((i - m->nmaster) % 2 ) {
+			h = (m->wh - ety) / ( (1 + n - i) / 2);
+			resize(c, m->wx, m->wy + ety, tw - 2*bw, h - 2*bw, bw, 0);
+			ety += HEIGHT(c);
+		} else {
+			h = (m->wh - oty) / ((1 + n - i) / 2);
+			resize(c, m->wx + mx + mw, m->wy + oty, tw - 2*bw, h - 2*bw, bw, 0);
+			oty += HEIGHT(c);
+		}
+	}
+}
+
 void
 checkotherwm(void)
 {