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