From c29cee8186c9a8d117a128b6848afb08035961c1 Mon Sep 17 00:00:00 2001
From: Miles Alan <m@milesalan.com>
Date: Mon, 17 Aug 2020 20:57:03 -0500
Subject: [PATCH] Add doubledeck layout function and bind to MOD+r

The doubledeck layout is like the deck layout, which stacks clients one ontop
of another in the stack area, however the doubledeck variant additionally
stacks clients one ontop of eachother in the master area.
---
 config.def.h |  2 ++
 dwm.c        | 22 ++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/config.def.h b/config.def.h
index 1c0b587..6538420 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 },
+	{ "DD",       doubledeck },
 };
 
 /* 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_r,      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..ce29fb4 100644
--- a/dwm.c
+++ b/dwm.c
@@ -161,6 +161,7 @@ static void destroynotify(XEvent *e);
 static void detach(Client *c);
 static void detachstack(Client *c);
 static Monitor *dirtomon(int dir);
+static void doubledeck(Monitor *m);
 static void drawbar(Monitor *m);
 static void drawbars(void);
 static void enternotify(XEvent *e);
@@ -692,6 +693,27 @@ dirtomon(int dir)
 	return m;
 }
 
+void
+doubledeck(Monitor *m) {
+	unsigned int i, n, 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 = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
+		if(i < m->nmaster)
+			resize(c, m->wx, m->wy, mw - (2*c->bw), m->wh - (2*c->bw), c->bw, False);
+		else
+			resize(c, m->wx + mw, m->wy, m->ww - mw - (2*c->bw), m->wh - (2*c->bw), c->bw, False);
+}
+
 void
 drawbar(Monitor *m)
 {
-- 
2.25.4