/* ntile/nmaster layout for dwm-4.6 */
#if 0
Type this into your config.h

/* ntile - nmaster */
extern void ntile(void);
void incnmaster(const char *arg);

Layout layouts[] = {
        { "-|=",                ntile }, /* first entry is default */
..
        { MODKEY|ShiftMask,             XK_j,           incnmaster,     "+1"}, \
        { MODKEY|ShiftMask,             XK_k,           incnmaster,     "-1"}, \
#endif

#include "dwm.h"

#define NMASTER 1
#define BORDERPX 1
#define RESIZEHINTS False

extern Client *clients;
extern Client *sel;
extern double mwfact;
extern int screen, sx, sy, sw, sh, wax, way, waw, wah;
extern unsigned int bh, bpos;
int nmaster = NMASTER;

void
ntile(void) {
	unsigned int i, n, nx, ny, nw, nh, mw, mh, th;
	Client *c;

	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
		n++;

	/* window geoms */
	mh = (n <= nmaster) ? wah / (n > 0 ? n : 1) : wah / nmaster;
	mw = (n <= nmaster) ? waw : mwfact * waw;
	th = (n > nmaster) ? wah / (n - nmaster) : 0;
	if(n > nmaster && th < bh)
		th = wah;

	nx = wax;
	ny = way;
	for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++) {
		c->ismax = False;
		if(i < nmaster) { /* master */
			ny = way + i * mh;
			nw = mw - 2 * c->border;
			nh = mh;
			if(i + 1 == (n < nmaster ? n : nmaster)) /* remainder */
				nh = wah - mh * i;
			nh -= 2 * c->border;
		}
		else {  /* tile window */
			if(i == nmaster) {
				ny = way;
				nx += mw;
			}
			nw = waw - mw - 2 * c->border;
			if(i + 1 == n) /* remainder */
				nh = (way + wah) - ny - 2 * c->border;
			else
				nh = th - 2 * c->border;
		}
		resize(c, nx, ny, nw, nh, RESIZEHINTS);
		if(n > nmaster && th != wah)
			ny += nh + 2 * c->border;
	}
}

void
incnmaster(const char *arg) {
	int i;

	if(!isarrange(ntile))
		return;
	if(!arg)
		nmaster = NMASTER;
	else {
		i = atoi(arg);
		if((nmaster + i) < 1 || wah / (nmaster + i) <= 2 * BORDERPX)
			return;
		nmaster += i;
	}
	if(sel)
		arrange();
}