## patch to add the doubletile layout to dwm.
## written by SlainVeteran (dwm_doubletile@slainvet.net) in 4 minutes on 17-Feb-2009.
diff -rupN dwm-5.3.1/config.def.h dwm-5.3.1.doubletile/config.def.h
--- dwm-5.3.1/config.def.h	2008-12-06 09:33:03.000000000 +0000
+++ dwm-5.3.1.doubletile/config.def.h	2009-02-17 22:56:23.000000000 +0000
@@ -29,12 +29,14 @@ static Rule rules[] = {
 /* layout(s) */
 static float mfact      = 0.55; /* factor of master area size [0.05..0.95] */
 static Bool resizehints = True; /* False means respect size hints in tiled resizals */
+static int dfact        = 2;    /* number of windows to appear on the left [1..] */
 
 static Layout layouts[] = {
 	/* symbol     arrange function */
 	{ "[]=",      tile },    /* first entry is default */
 	{ "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
+	{ "-|=",      doubletile },
 };
 
 /* key definitions */
@@ -61,6 +63,8 @@ static Key keys[] = {
 	{ MODKEY,                       XK_k,      focusstack,     {.i = -1 } },
 	{ MODKEY,                       XK_h,      setmfact,       {.f = -0.05} },
 	{ MODKEY,                       XK_l,      setmfact,       {.f = +0.05} },
+	{ MODKEY,                       XK_u,      setdfact,       {.i = +1} },
+	{ MODKEY,                       XK_i,      setdfact,       {.i = -1} },
 	{ MODKEY,                       XK_Return, zoom,           {0} },
 	{ MODKEY,                       XK_Tab,    view,           {0} },
 	{ MODKEY|ShiftMask,             XK_c,      killclient,     {0} },
diff -rupN dwm-5.3.1/dwm.c dwm-5.3.1.doubletile/dwm.c
--- dwm-5.3.1/dwm.c	2008-12-06 09:33:03.000000000 +0000
+++ dwm-5.3.1.doubletile/dwm.c	2009-02-17 22:51:06.000000000 +0000
@@ -149,6 +149,7 @@ static void die(const char *errstr, ...)
 static void drawbar(void);
 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
+static void doubletile(void);
 static void enternotify(XEvent *e);
 static void expose(XEvent *e);
 static void focus(Client *c);
@@ -179,6 +180,7 @@ static void run(void);
 static void scan(void);
 static void setclientstate(Client *c, long state);
 static void setlayout(const Arg *arg);
+static void setdfact(const Arg *arg);
 static void setmfact(const Arg *arg);
 static void setup(void);
 static void showhide(Client *c);
@@ -583,6 +585,50 @@ drawtext(const char *text, unsigned long
 }
 
 void
+doubletile(void) {
+	int x, y, h, w, mw;
+	unsigned int i, n, min;
+	Client *c;
+
+	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
+	if(n == 0)
+		return;
+
+	/* main stack */
+	min = dfact < n ? dfact : n;
+	mw = dfact >= n ? ww : mfact * ww;
+	y = wy;
+	h = wh / min;
+	if(h < bh)
+		h = wh;
+	
+	for(i = 0, c = nexttiled(clients); i < min; c = nexttiled(c->next), i++) {
+		resize(c, wx, y, mw - 2 * c->bw, /* remainder */ ((i + 1 == min)
+			? wy + wh - y - 2 * c->bw : h - 2 * c->bw), resizehints);
+		if(h != wh)
+			y = c->y + HEIGHT(c);
+
+		if(--n == 0)
+			return;
+	}
+
+	/* tile stack */
+	x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
+	y = wy;
+	w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
+	h = wh / n;
+	if(h < bh)
+		h = wh;
+
+	for(i = 0; c; c = nexttiled(c->next), i++) {
+		resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
+			? wy + wh - y - 2 * c->bw : h - 2 * c->bw), resizehints);
+		if(h != wh)
+			y = c->y + HEIGHT(c);
+	}
+}
+
+void
 enternotify(XEvent *e) {
 	Client *c;
 	XCrossingEvent *ev = &e->xcrossing;
@@ -1283,6 +1329,19 @@ setlayout(const Arg *arg) {
 		drawbar();
 }
 
+void
+setdfact(const Arg *arg) {
+	int i;
+
+	if(!arg || !lt[sellt]->arrange)
+		return;
+	i = arg->i + dfact;
+	if(i < 1)
+		return;
+	dfact = i;
+	arrange();
+}
+
 /* arg > 1.0 will set mfact absolutly */
 void
 setmfact(const Arg *arg) {