apply nmaster patch

config.def.h

@@ -24,6 +24,7 @@ static const Rule rules[] = {
 
 /* layout(s) */
 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 Bool resizehints = True; /* True means respect size hints in tiled resizals */
 
 static const Layout layouts[] = {
@@ -55,6 +56,8 @@ static Key keys[] = {
 	{ MODKEY,                       XK_b,      togglebar,      {0} },
 	{ MODKEY,                       XK_j,      focusstack,     {.i = +1 } },
 	{ MODKEY,                       XK_k,      focusstack,     {.i = -1 } },
+	{ MODKEY,                       XK_i,      incnmaster,     {.i = +1 } },
+	{ MODKEY,                       XK_d,      incnmaster,     {.i = -1 } },
 	{ MODKEY,                       XK_h,      setmfact,       {.f = -0.05} },
 	{ MODKEY,                       XK_l,      setmfact,       {.f = +0.05} },
 	{ MODKEY,                       XK_Return, zoom,           {0} },

dwm.c

@@ -125,6 +125,7 @@ typedef struct {
 struct Monitor {
 	char ltsymbol[16];
 	float mfact;
+	int nmaster;
 	int num;
 	int by;               /* bar geometry */
 	int mx, my, mw, mh;   /* screen size */
@@ -189,6 +190,7 @@ static long getstate(Window w);
 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
 static void grabbuttons(Client *c, Bool focused);
 static void grabkeys(void);
+static void incnmaster(const Arg *arg);
 static void initfont(const char *fontstr);
 static void keypress(XEvent *e);
 static void killclient(const Arg *arg);
@@ -664,6 +666,7 @@ createmon(void) {
 		die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
 	m->tagset[0] = m->tagset[1] = 1;
 	m->mfact = mfact;
+	m->nmaster = nmaster;
 	m->showbar = showbar;
 	m->topbar = topbar;
 	m->lt[0] = &layouts[0];
@@ -1023,6 +1026,12 @@ grabkeys(void) {
 	}
 }
 
+void
+incnmaster(const Arg *arg) {
+	selmon->nmaster = MAX(selmon->nmaster + arg->i, 1);
+	arrange(selmon);
+}
+
 void
 initfont(const char *fontstr) {
 	char *def, **missing;
@@ -1650,32 +1659,23 @@ textnw(const char *text, unsigned int len) {
 
 void
 tile(Monitor *m) {
-	int x, y, h, w, mw;
+	unsigned int i, n, mw, mh, tw, th;
-	unsigned int i, n;
 	Client *c;
 
 	for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
 	if(n == 0)
 		return;
-	/* master */
+
-	c = nexttiled(m->clients);
+	mh = (n > m->nmaster) ? m->wh / m->nmaster : m->wh / n;
-	mw = m->mfact * m->ww;
+	mw = (n > m->nmaster) ? m->ww * m->mfact : m->ww;
-	resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
+	th = (n > m->nmaster) ? m->wh / (n - m->nmaster) : 0;
-	if(--n == 0)
+	tw = m->ww - mw;
-		return;
+
-	/* tile stack */
+	for(i = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
-	x = (m->wx > c->x) ? c->x + mw + 2 * c->bw : m->wx + mw;
+		if(i < m->nmaster)
-	y = m->wy;
+			resize(c, m->wx, m->wy + (i*mh), mw - (2*c->bw), mh - (2*c->bw), False);
-	w = (m->wx > c->x) ? m->wx + m->ww - x : m->ww - mw;
+		else
-	h = m->wh / n;
+			resize(c, m->wx + mw, m->wy + ((i - m->nmaster)*th), tw - (2*c->bw), th - (2*c->bw), False);
-	if(h < bh)
-		h = m->wh;
-	for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
-		resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
-		       ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
-		if(h != m->wh)
-			y = c->y + HEIGHT(c);
-	}
 }
 
 void