Added gridmode

config.h

@@ -37,11 +37,13 @@ static const float mfact     = 0.55; /* factor of master area size [0.05..0.95]
 static const int nmaster     = 1;    /* number of clients in master area */
 static const int resizehints = 1;    /* 1 means respect size hints in tiled resizals */
 
+#include "layouts.c"
 static const Layout layouts[] = {
 	/* symbol     arrange function */
 	{ "[]=",      tile },    /* first entry is default */
 	{ "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
+	{ "HHH",      grid },
 };
 
 /* key definitions */
@@ -81,6 +83,7 @@ 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_g,      setlayout,      {.v = &layouts[3]} },
 	{ MODKEY,                       XK_space,  setlayout,      {0} },
 	{ MODKEY|ShiftMask,             XK_space,  togglefloating, {0} },
 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },

dwm-gridmode-20170909-ceac8c9.diff

@@ -0,0 +1,73 @@
+From b04bb473cf9818277d33a591f7fe2dfae96afaaf Mon Sep 17 00:00:00 2001
+From: Joshua Haase <hahj87@gmail.com>
+Date: Mon, 15 Aug 2016 17:06:18 -0500
+Subject: [PATCH] Apply modified gridmode patch.
+
+---
+ config.def.h |  3 +++
+ layouts.c    | 27 +++++++++++++++++++++++++++
+ 2 files changed, 30 insertions(+)
+ create mode 100644 layouts.c
+
+diff --git a/config.h b/config.h
+index a9ac303..30b7c4a 100644
+--- a/config.h
++++ b/config.h
+@@ -36,11 +36,13 @@ static const float mfact     = 0.55; /* factor of master area size [0.05..0.95]
+ static const int nmaster     = 1;    /* number of clients in master area */
+ static const int resizehints = 1;    /* 1 means respect size hints in tiled resizals */
+ 
++#include "layouts.c"
+ static const Layout layouts[] = {
+ 	/* symbol     arrange function */
+ 	{ "[]=",      tile },    /* first entry is default */
+ 	{ "><>",      NULL },    /* no layout function means floating behavior */
+ 	{ "[M]",      monocle },
++	{ "HHH",      grid },
+ };
+ 
+ /* key definitions */
+@@ -76,6 +78,7 @@ 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_g,      setlayout,      {.v = &layouts[3]} },
+ 	{ MODKEY,                       XK_space,  setlayout,      {0} },
+ 	{ MODKEY|ShiftMask,             XK_space,  togglefloating, {0} },
+ 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },
+diff --git a/layouts.c b/layouts.c
+new file mode 100644
+index 0000000..d26acf3
+--- /dev/null
++++ b/layouts.c
+@@ -0,0 +1,27 @@
++void
++grid(Monitor *m) {
++	unsigned int i, n, cx, cy, cw, ch, aw, ah, cols, rows;
++	Client *c;
++
++	for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next))
++		n++;
++
++	/* grid dimensions */
++	for(rows = 0; rows <= n/2; rows++)
++		if(rows*rows >= n)
++			break;
++	cols = (rows && (rows - 1) * rows >= n) ? rows - 1 : rows;
++
++	/* window geoms (cell height/width) */
++	ch = m->wh / (rows ? rows : 1);
++	cw = m->ww / (cols ? cols : 1);
++	for(i = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next)) {
++		cx = m->wx + (i / rows) * cw;
++		cy = m->wy + (i % rows) * ch;
++		/* adjust height/width of last row/column's windows */
++		ah = ((i + 1) % rows == 0) ? m->wh - ch * rows : 0;
++		aw = (i >= rows * (cols - 1)) ? m->ww - cw * cols : 0;
++		resize(c, cx, cy, cw - 2 * c->bw + aw, ch - 2 * c->bw + ah, False);
++		i++;
++	}
++}
+-- 
+2.14.1
+

layouts.c

@@ -0,0 +1,27 @@
+void
+grid(Monitor *m) {
+	unsigned int i, n, cx, cy, cw, ch, aw, ah, cols, rows;
+	Client *c;
+
+	for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next))
+		n++;
+
+	/* grid dimensions */
+	for(rows = 0; rows <= n/2; rows++)
+		if(rows*rows >= n)
+			break;
+	cols = (rows && (rows - 1) * rows >= n) ? rows - 1 : rows;
+
+	/* window geoms (cell height/width) */
+	ch = m->wh / (rows ? rows : 1);
+	cw = m->ww / (cols ? cols : 1);
+	for(i = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next)) {
+		cx = m->wx + (i / rows) * cw;
+		cy = m->wy + (i % rows) * ch;
+		/* adjust height/width of last row/column's windows */
+		ah = ((i + 1) % rows == 0) ? m->wh - ch * rows : 0;
+		aw = (i >= rows * (cols - 1)) ? m->ww - cw * cols : 0;
+		resize(c, cx, cy, cw - 2 * c->bw + aw, ch - 2 * c->bw + ah, False);
+		i++;
+	}
+}