1/*
  2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
  3 * See LICENSE file for license details.
  4 */
  5#include "dwm.h"
  6#include <regex.h>
  7#include <stdio.h>
  8#include <stdlib.h>
  9#include <string.h>
 10#include <sys/types.h>
 11#include <X11/Xutil.h>
 12
 13
 14typedef struct {
 15	const char *clpattern;
 16	const char *tpattern;
 17	Bool isfloat;
 18} Rule;
 19
 20typedef struct {
 21	regex_t *clregex;
 22	regex_t *tregex;
 23} RReg;
 24
 25/* static */
 26
 27TAGS
 28RULES
 29
 30static RReg *rreg = NULL;
 31static unsigned int len = 0;
 32
 33void (*arrange)(Arg *) = DEFMODE;
 34
 35/* extern */
 36
 37void
 38dofloat(Arg *arg)
 39{
 40	Client *c;
 41
 42	for(c = clients; c; c = c->next) {
 43		c->ismax = False;
 44		if(isvisible(c)) {
 45			resize(c, True, TopLeft);
 46		}
 47		else
 48			ban(c);
 49	}
 50	if(!sel || !isvisible(sel))
 51		sel = getnext(clients);
 52	if(sel) {
 53		focus(sel);
 54		restack();
 55	}
 56	else
 57		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 58}
 59
 60void
 61dotile(Arg *arg)
 62{
 63	int h, i, n, w;
 64	Client *c;
 65
 66	w = sw - mw;
 67	for(n = 0, c = clients; c; c = c->next)
 68		if(isvisible(c) && !c->isfloat)
 69			n++;
 70
 71	if(n > 1)
 72		h = (sh - bh) / (n - 1);
 73	else
 74		h = sh - bh;
 75
 76	for(i = 0, c = clients; c; c = c->next) {
 77		c->ismax = False;
 78		if(isvisible(c)) {
 79			if(c->isfloat) {
 80				resize(c, True, TopLeft);
 81				continue;
 82			}
 83			if(n == 1) {
 84				c->x = sx;
 85				c->y = sy + bh;
 86				c->w = sw - 2;
 87				c->h = sh - 2 - bh;
 88			}
 89			else if(i == 0) {
 90				c->x = sx;
 91				c->y = sy + bh;
 92				c->w = mw - 2;
 93				c->h = sh - 2 - bh;
 94			}
 95			else if(h > bh) {
 96				c->x = sx + mw;
 97				c->y = sy + (i - 1) * h + bh;
 98				c->w = w - 2;
 99				if(i + 1 == n)
100					c->h = sh - c->y - 2;
101				else
102					c->h = h - 2;
103			}
104			else { /* fallback if h < bh */
105				c->x = sx + mw;
106				c->y = sy + bh;
107				c->w = w - 2;
108				c->h = sh - 2 - bh;
109			}
110			resize(c, False, TopLeft);
111			i++;
112		}
113		else
114			ban(c);
115	}
116	if(!sel || !isvisible(sel))
117		sel = getnext(clients);
118	if(sel)
119		focus(sel);
120	else
121		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
122	restack();
123}
124
125Client *
126getnext(Client *c)
127{
128	for(; c && !isvisible(c); c = c->next);
129	return c;
130}
131
132Client *
133getprev(Client *c)
134{
135	for(; c && !isvisible(c); c = c->prev);
136	return c;
137}
138
139void
140initrregs()
141{
142	unsigned int i;
143	regex_t *reg;
144
145	if(rreg)
146		return;
147	len = sizeof(rule) / sizeof(rule[0]);
148	rreg = emallocz(len * sizeof(RReg));
149
150	for(i = 0; i < len; i++) {
151		if(rule[i].clpattern) {
152			reg = emallocz(sizeof(regex_t));
153			if(regcomp(reg, rule[i].clpattern, 0))
154				free(reg);
155			else
156				rreg[i].clregex = reg;
157		}
158		if(rule[i].tpattern) {
159			reg = emallocz(sizeof(regex_t));
160			if(regcomp(reg, rule[i].tpattern, 0))
161				free(reg);
162			else
163				rreg[i].tregex = reg;
164		}
165	}
166}
167
168Bool
169isvisible(Client *c)
170{
171	unsigned int i;
172
173	for(i = 0; i < ntags; i++)
174		if(c->tags[i] && seltag[i])
175			return True;
176	return False;
177}
178
179void
180restack()
181{
182	static unsigned int nwins = 0;
183	static Window *wins = NULL;
184	unsigned int f, fi, m, mi, n;
185	Client *c;
186	XEvent ev;
187
188	for(f = 0, m = 0, c = clients; c; c = c->next)
189		if(isvisible(c)) {
190			if(c->isfloat || arrange == dofloat)
191				f++;
192			else
193				m++;
194		}
195	if(!(n = 2 * (f + m))) {
196		drawstatus();
197		return;
198	}
199	if(nwins < n) {
200		nwins = n;
201		wins = erealloc(wins, nwins * sizeof(Window));
202	}
203
204	fi = 0;
205	mi = 2 * f;
206	if(sel->isfloat || arrange == dofloat) {
207		wins[fi++] = sel->title;
208		wins[fi++] = sel->win;
209	}
210	else {
211		wins[mi++] = sel->title;
212		wins[mi++] = sel->win;
213	}
214	for(c = clients; c; c = c->next)
215		if(isvisible(c) && c != sel) {
216			if(c->isfloat || arrange == dofloat) {
217				wins[fi++] = c->title;
218				wins[fi++] = c->win;
219			}
220			else {
221				wins[mi++] = c->title;
222				wins[mi++] = c->win;
223			}
224		}
225	XRestackWindows(dpy, wins, n);
226	drawall();
227	XSync(dpy, False);
228	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
229}
230
231void
232settags(Client *c)
233{
234	char classinst[256];
235	unsigned int i, j;
236	regmatch_t tmp;
237	Bool matched = False;
238	XClassHint ch;
239
240	if(XGetClassHint(dpy, c->win, &ch)) {
241		snprintf(classinst, sizeof(classinst), "%s:%s",
242				ch.res_class ? ch.res_class : "",
243				ch.res_name ? ch.res_name : "");
244		for(i = 0; !matched && i < len; i++)
245			if(rreg[i].clregex && !regexec(rreg[i].clregex, classinst, 1, &tmp, 0)) {
246				c->isfloat = rule[i].isfloat;
247				for(j = 0; rreg[i].tregex && j < ntags; j++) {
248					if(!regexec(rreg[i].tregex, tags[j], 1, &tmp, 0)) {
249						matched = True;
250						c->tags[j] = True;
251					}
252				}
253			}
254		if(ch.res_class)
255			XFree(ch.res_class);
256		if(ch.res_name)
257			XFree(ch.res_name);
258	}
259	if(!matched)
260		for(i = 0; i < ntags; i++)
261			c->tags[i] = seltag[i];
262}
263
264void
265tag(Arg *arg)
266{
267	unsigned int i;
268
269	if(!sel)
270		return;
271
272	for(i = 0; i < ntags; i++)
273		sel->tags[i] = False;
274	sel->tags[arg->i] = True;
275	settitle(sel);
276	if(!isvisible(sel))
277		arrange(NULL);
278}
279
280void
281togglemode(Arg *arg)
282{
283	arrange = arrange == dofloat ? dotile : dofloat;
284	if(sel)
285		arrange(NULL);
286	else
287		drawstatus();
288}
289
290void
291toggletag(Arg *arg)
292{
293	unsigned int i;
294
295	if(!sel)
296		return;
297
298	sel->tags[arg->i] = !sel->tags[arg->i];
299	for(i = 0; i < ntags && !sel->tags[i]; i++);
300	if(i == ntags)
301		sel->tags[arg->i] = True;
302	settitle(sel);
303	if(!isvisible(sel))
304		arrange(NULL);
305}
306
307
308void
309toggleview(Arg *arg)
310{
311	unsigned int i;
312
313	seltag[arg->i] = !seltag[arg->i];
314	for(i = 0; i < ntags && !seltag[i]; i++);
315	if(i == ntags)
316		seltag[arg->i] = True; /* cannot toggle last view */
317	arrange(NULL);
318}
319
320void
321view(Arg *arg)
322{
323	unsigned int i;
324
325	for(i = 0; i < ntags; i++)
326		seltag[i] = False;
327	seltag[arg->i] = True;
328	arrange(NULL);
329}