/*

 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>

 * See LICENSE file for license details.

 */

#include "dwm.h"

#include <regex.h>

#include <stdio.h>

#include <string.h>

#include <sys/types.h>

#include <X11/Xutil.h>

/* static */

typedef struct {

	const char *pattern;

	char *tags[TLast];

	Bool isfloat;

} Rule;

/* CUSTOMIZE */ 

static Rule rule[] = {

	/* class:instance	tags				isfloat */

	{ "Firefox.*",		{ [Twww] = "www" },		False },

	{ "Gimp.*",		{ 0 },				True},

};

char *tags[TLast] = {

	[Tscratch] = "scratch",

	[Tdev] = "dev",

	[Twww] = "www",

	[Twork] = "work",

};

void (*arrange)(Arg *) = dotile;

void

appendtag(Arg *arg)

{

	if(!sel)

		return;

	sel->tags[arg->i] = tags[arg->i];

	arrange(NULL);

}

void

dofloat(Arg *arg)

{

	Client *c;

	for(c = clients; c; c = c->next) {

		c->ismax = False;

		if(c->tags[tsel]) {

			resize(c, True, TopLeft);

		}

		else

			ban(c);

	}

	if(sel && !sel->tags[tsel]) {

		if((sel = getnext(clients, tsel))) {

			higher(sel);

			focus(sel);

		}

	}

	drawall();

}

void

dotile(Arg *arg)

{

	int n, i, w, h;

	Client *c;

	w = sw - mw;

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

		if(c->tags[tsel] && !c->isfloat)

			n++;

	if(n > 1)

		h = (sh - bh) / (n - 1);

	else

		h = sh - bh;

	for(i = 0, c = clients; c; c = c->next) {

		c->ismax = False;

		if(c->tags[tsel]) {

			if(c->isfloat) {

				higher(c);

				resize(c, True, TopLeft);

				continue;

			}

			if(n == 1) {

				c->x = sx;

				c->y = sy + bh;

				c->w = sw - 2 * c->border;

				c->h = sh - 2 * c->border - bh;

			}

			else if(i == 0) {

				c->x = sx;

				c->y = sy + bh;

				c->w = mw - 2 * c->border;

				c->h = sh - 2 * c->border - bh;

			}

			else if(h > bh) {

				c->x = sx + mw;

				c->y = sy + (i - 1) * h + bh;

				c->w = w - 2 * c->border;

				c->h = h - 2 * c->border;

			}

			else { /* fallback if h < bh */

				c->x = sx + mw;

				c->y = sy + bh;

				c->w = w - 2 * c->border;

				c->h = sh - 2 * c->border - bh;

			}

			resize(c, False, TopLeft);

			i++;

		}

		else

			ban(c);

	}

	if(!sel || (sel && !sel->tags[tsel])) {

		if((sel = getnext(clients, tsel))) {

			higher(sel);

			focus(sel);

		}

	}

	drawall();

}

Client *

getnext(Client *c, unsigned int t)

{

	for(; c && !c->tags[t]; c = c->next);

	return c;

}

void

heretag(Arg *arg)

{

	int i;

	Client *c;

	if(arg->i == tsel)

		return;

	if(!(c = getnext(clients, arg->i)))

		return;

	for(i = 0; i < TLast; i++)

		c->tags[i] = NULL;

	c->tags[tsel] = tags[tsel];

	pop(c);

	focus(c);

}

void

replacetag(Arg *arg)

{

	int i;

	if(!sel)

		return;

	for(i = 0; i < TLast; i++)

		sel->tags[i] = NULL;

	appendtag(arg);

}

void

settags(Client *c)

{

	char classinst[256];

	static unsigned int len = rule ? sizeof(rule) / sizeof(rule[0]) : 0;

	unsigned int i, j;

	regex_t regex;

	regmatch_t tmp;

	Bool matched = False;

	XClassHint ch;

	if(!len) {

		c->tags[tsel] = tags[tsel];

		return;

	}

	if(XGetClassHint(dpy, c->win, &ch)) {

		snprintf(classinst, sizeof(classinst), "%s:%s",

				ch.res_class ? ch.res_class : "",

				ch.res_name ? ch.res_name : "");

		for(i = 0; !matched && i < len; i++) {

			if(!regcomp(&regex, rule[i].pattern, 0)) {

				if(!regexec(&regex, classinst, 1, &tmp, 0)) {

					for(j = 0; j < TLast; j++) {

						if(rule[i].tags[j])

							matched = True;

						c->tags[j] = rule[i].tags[j];

					}

					c->isfloat = rule[i].isfloat;

				}

				regfree(&regex);

			}

		}

		if(ch.res_class)

			XFree(ch.res_class);

		if(ch.res_name)

			XFree(ch.res_name);

	}

	if(!matched)

		c->tags[tsel] = tags[tsel];

}

void

togglemode(Arg *arg)

{

	arrange = arrange == dofloat ? dotile : dofloat;

	arrange(NULL);

}

void

view(Arg *arg)

{

	tsel = arg->i;

	arrange(NULL);

	drawall();

}