From 8394c430458713aa14dd8afdf86a9b14c646a1e7 Mon Sep 17 00:00:00 2001
From: Louis Bettens <louis@bettens.info>
Date: Thu, 2 Dec 2021 21:41:07 +0100
Subject: [PATCH] columns

This patch adds an extra layout to dwm called `col` in which the windows in the
master area are arranged in colums of equal size. The number of columns is
always nmaster + 1, and the last column is a stack of leftover windows just
like the normal tile layout. It effectively acts like the default tiling mode,
except provides for vertical instead of horizontal master windows.

Co-authored-by: Evan Gates (emg) <evan.gates@gmail.com>
Co-authored-by: Noah Rosser <noah.rosser@gmail.com>
---
 config.def.h |  2 ++
 dwm.c        | 27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/config.def.h b/config.def.h
index 1c0b587..de7a2e7 100644
--- a/config.def.h
+++ b/config.def.h
@@ -41,6 +41,7 @@ static const Layout layouts[] = {
 	{ "[]=",      tile },    /* first entry is default */
 	{ "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
+	{ "|||",      col },
 };
 
 /* key definitions */
@@ -76,6 +77,7 @@ 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_c,      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 4465af1..b5845c9 100644
--- a/dwm.c
+++ b/dwm.c
@@ -153,6 +153,7 @@ static void checkotherwm(void);
 static void cleanup(void);
 static void cleanupmon(Monitor *mon);
 static void clientmessage(XEvent *e);
+static void col(Monitor *);
 static void configure(Client *c);
 static void configurenotify(XEvent *e);
 static void configurerequest(XEvent *e);
@@ -1670,6 +1671,32 @@ tagmon(const Arg *arg)
 	sendmon(selmon->sel, dirtomon(arg->i));
 }
 
+void
+col(Monitor *m)
+{
+	unsigned int i, n, h, w, x, y, mw;
+	Client *c;
+
+	for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
+	if (n == 0)
+		return;
+
+	if (n > m->nmaster)
+		mw = m->nmaster ? m->ww * m->mfact : 0;
+	else
+		mw = m->ww;
+	for (i = x = y = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
+		if (i < m->nmaster) {
+			w = (mw - x) / (MIN(n, m->nmaster) - i);
+			resize(c, x + m->wx, m->wy, w - (2 * c->bw), m->wh - (2 * c->bw), 0);
+			x += WIDTH(c);
+		} else {
+			h = (m->wh - y) / (n - i);
+			resize(c, x + m->wx, m->wy + y, m->ww - x - (2 * c->bw), h - (2 * c->bw), 0);
+			y += HEIGHT(c);
+		}
+}
+
 void
 tile(Monitor *m)
 {
-- 
2.34.0