Gaplessgrid patch + dwm binary

config.h

@@ -43,11 +43,13 @@ 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 "gaplessgrid.c"
 static const Layout layouts[] = {
 	/* symbol     arrange function */
 	{ "[]=",      tile },    /* first entry is default */
 	{ "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
+	{ "###",      gaplessgrid },
 };
 
 /* key definitions */
@@ -131,6 +133,7 @@ static const Key keys[] = {
 	{ MODKEY,                       XK_t,      setlayout,      {.v = &layouts[0]} },
 	{ MODKEY,                       XK_e,      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_f,      togglefullscreen, {0} },

gaplessgrid.c

@@ -0,0 +1,35 @@
+void
+gaplessgrid(Monitor *m) {
+	unsigned int n, cols, rows, cn, rn, i, cx, cy, cw, ch;
+	Client *c;
+
+	for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++) ;
+	if(n == 0)
+		return;
+
+	/* grid dimensions */
+	for(cols = 0; cols <= n/2; cols++)
+		if(cols*cols >= n)
+			break;
+	if(n == 5) /* set layout against the general calculation: not 1:2:2, but 2:3 */
+		cols = 2;
+	rows = n/cols;
+
+	/* window geometries */
+	cw = cols ? m->ww / cols : m->ww;
+	cn = 0; /* current column number */
+	rn = 0; /* current row number */
+	for(i = 0, c = nexttiled(m->clients); c; i++, c = nexttiled(c->next)) {
+		if(i/rows + 1 > cols - n%cols)
+			rows = n/cols + 1;
+		ch = rows ? m->wh / rows : m->wh;
+		cx = m->wx + cn*cw;
+		cy = m->wy + rn*ch;
+		resize(c, cx, cy, cw - 2 * c->bw, ch - 2 * c->bw, False);
+		rn++;
+		if(rn >= rows) {
+			rn = 0;
+			cn++;
+		}
+	}
+}

patches/dwm-gaplessgrid-20160731-56a31dc.diff

@@ -0,0 +1,43 @@
+URL: http://dwm.suckless.org/patches/gapless_grid
+Add gapless grid layout.
+
+Index: dwm/gaplessgrid.c
+===================================================================
+--- /dev/null
++++ dwm/gaplessgrid.c
+@@ -0,0 +1,35 @@
++void
++gaplessgrid(Monitor *m) {
++	unsigned int n, cols, rows, cn, rn, i, cx, cy, cw, ch;
++	Client *c;
++
++	for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++) ;
++	if(n == 0)
++		return;
++
++	/* grid dimensions */
++	for(cols = 0; cols <= n/2; cols++)
++		if(cols*cols >= n)
++			break;
++	if(n == 5) /* set layout against the general calculation: not 1:2:2, but 2:3 */
++		cols = 2;
++	rows = n/cols;
++
++	/* window geometries */
++	cw = cols ? m->ww / cols : m->ww;
++	cn = 0; /* current column number */
++	rn = 0; /* current row number */
++	for(i = 0, c = nexttiled(m->clients); c; i++, c = nexttiled(c->next)) {
++		if(i/rows + 1 > cols - n%cols)
++			rows = n/cols + 1;
++		ch = rows ? m->wh / rows : m->wh;
++		cx = m->wx + cn*cw;
++		cy = m->wy + rn*ch;
++		resize(c, cx, cy, cw - 2 * c->bw, ch - 2 * c->bw, False);
++		rn++;
++		if(rn >= rows) {
++			rn = 0;
++			cn++;
++		}
++	}
++}