1/* See LICENSE file for copyright and license details. */
  2#include "dwm.h"
  3#include <regex.h>
  4#include <stdio.h>
  5#include <stdlib.h>
  6#include <X11/Xutil.h>
  7
  8/* static */
  9
 10typedef struct {
 11	const char *symbol;
 12	void (*arrange)(void);
 13} Layout;
 14
 15typedef struct {
 16	const char *prop;
 17	const char *tags;
 18	Bool isfloating;
 19} Rule;
 20
 21typedef struct {
 22	regex_t *propregex;
 23	regex_t *tagregex;
 24} Regs;
 25
 26TAGS
 27RULES
 28
 29static unsigned int nrules = 0;
 30static unsigned int nlayouts = 0;
 31static unsigned int ltidx = 0; /* default */
 32static Regs *regs = NULL;
 33
 34static unsigned int
 35idxoftag(const char *tag) {
 36	unsigned int i;
 37
 38	for(i = 0; i < ntags; i++)
 39		if(tags[i] == tag)
 40			return i;
 41	return 0;
 42}
 43
 44static void
 45floating(void) { /* default floating layout */
 46	Client *c;
 47
 48	for(c = clients; c; c = c->next)
 49		if(isvisible(c))
 50			resize(c, c->x, c->y, c->w, c->h, True);
 51}
 52
 53LAYOUTS
 54
 55/* extern */
 56
 57unsigned int blw = 0;
 58
 59void
 60applyrules(Client *c) {
 61	static char buf[512];
 62	unsigned int i, j;
 63	regmatch_t tmp;
 64	Bool matched = False;
 65	XClassHint ch = { 0 };
 66
 67	/* rule matching */
 68	XGetClassHint(dpy, c->win, &ch);
 69	snprintf(buf, sizeof buf, "%s:%s:%s",
 70			ch.res_class ? ch.res_class : "",
 71			ch.res_name ? ch.res_name : "", c->name);
 72	for(i = 0; i < nrules; i++)
 73		if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
 74			c->isfloating = rules[i].isfloating;
 75			for(j = 0; regs[i].tagregex && j < ntags; j++) {
 76				if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
 77					matched = True;
 78					c->tags[j] = True;
 79				}
 80			}
 81		}
 82	if(ch.res_class)
 83		XFree(ch.res_class);
 84	if(ch.res_name)
 85		XFree(ch.res_name);
 86	if(!matched)
 87		for(i = 0; i < ntags; i++)
 88			c->tags[i] = seltags[i];
 89}
 90
 91void
 92arrange(void) {
 93	Client *c;
 94
 95	for(c = clients; c; c = c->next)
 96		if(isvisible(c))
 97			unban(c);
 98		else
 99			ban(c);
100	layouts[ltidx].arrange();
101	focus(NULL);
102	restack();
103}
104
105void
106compileregs(void) {
107	unsigned int i;
108	regex_t *reg;
109
110	if(regs)
111		return;
112	nrules = sizeof rules / sizeof rules[0];
113	regs = emallocz(nrules * sizeof(Regs));
114	for(i = 0; i < nrules; i++) {
115		if(rules[i].prop) {
116			reg = emallocz(sizeof(regex_t));
117			if(regcomp(reg, rules[i].prop, REG_EXTENDED))
118				free(reg);
119			else
120				regs[i].propregex = reg;
121		}
122		if(rules[i].tags) {
123			reg = emallocz(sizeof(regex_t));
124			if(regcomp(reg, rules[i].tags, REG_EXTENDED))
125				free(reg);
126			else
127				regs[i].tagregex = reg;
128		}
129	}
130}
131
132void
133focusnext(const char *arg) {
134	Client *c;
135
136	if(!sel)
137		return;
138	for(c = sel->next; c && !isvisible(c); c = c->next);
139	if(!c)
140		for(c = clients; c && !isvisible(c); c = c->next);
141	if(c) {
142		focus(c);
143		restack();
144	}
145}
146
147void
148focusprev(const char *arg) {
149	Client *c;
150
151	if(!sel)
152		return;
153	for(c = sel->prev; c && !isvisible(c); c = c->prev);
154	if(!c) {
155		for(c = clients; c && c->next; c = c->next);
156		for(; c && !isvisible(c); c = c->prev);
157	}
158	if(c) {
159		focus(c);
160		restack();
161	}
162}
163
164const char *
165getsymbol(void)
166{
167	return layouts[ltidx].symbol;
168}
169
170void
171initlayouts(void) {
172	unsigned int i, w;
173
174	nlayouts = sizeof layouts / sizeof layouts[0];
175	for(blw = i = 0; i < nlayouts; i++) {
176		w = textw(layouts[i].symbol);
177		if(w > blw)
178			blw = w;
179	}
180}
181
182Bool
183isfloating(void) {
184	return layouts[ltidx].arrange == floating;
185}
186
187Bool
188isarrange(void (*func)())
189{
190	return func == layouts[ltidx].arrange;
191}
192
193Bool
194isvisible(Client *c) {
195	unsigned int i;
196
197	for(i = 0; i < ntags; i++)
198		if(c->tags[i] && seltags[i])
199			return True;
200	return False;
201}
202
203Client *
204nexttiled(Client *c) {
205	for(; c && (c->isfloating || !isvisible(c)); c = c->next);
206	return c;
207}
208
209void
210restack(void) {
211	Client *c;
212	XEvent ev;
213	XWindowChanges wc;
214
215	drawstatus();
216	if(!sel)
217		return;
218	if(sel->isfloating || isfloating())
219		XRaiseWindow(dpy, sel->win);
220	if(!isfloating()) {
221		wc.stack_mode = Below;
222		wc.sibling = barwin;
223		if(!sel->isfloating) {
224			XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
225			wc.sibling = sel->win;
226		}
227		for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
228			if(c == sel)
229				continue;
230			XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
231			wc.sibling = c->win;
232		}
233	}
234	XSync(dpy, False);
235	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
236}
237
238void
239setlayout(const char *arg) {
240	unsigned int i;
241
242	if(!arg) {
243		if(++ltidx == nlayouts)
244			ltidx = 0;;
245	}
246	else {
247		for(i = 0; i < nlayouts; i++)
248			if(arg == layouts[i].symbol)
249				break;
250		if(i == nlayouts)
251			return;
252		ltidx = i;
253	}
254	if(sel)
255		arrange();
256	else
257		drawstatus();
258}
259
260void
261tag(const char *arg) {
262	unsigned int i;
263
264	if(!sel)
265		return;
266	for(i = 0; i < ntags; i++)
267		sel->tags[i] = arg == NULL;
268	i = idxoftag(arg);
269	if(i >= 0 && i < ntags)
270		sel->tags[i] = True;
271	arrange();
272}
273
274void
275togglebar(const char *arg) {
276	if(bpos == BarOff)
277		bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
278	else
279		bpos = BarOff;
280	updatebarpos();
281	arrange();
282}
283
284void
285togglefloating(const char *arg) {
286	if(!sel || isfloating())
287		return;
288	sel->isfloating = !sel->isfloating;
289	if(sel->isfloating)
290		resize(sel, sel->x, sel->y, sel->w, sel->h, True);
291	arrange();
292}
293
294void
295togglemax(const char *arg) {
296	XEvent ev;
297
298	if(!sel || (!isfloating() && !sel->isfloating) || sel->isfixed)
299		return;
300	if((sel->ismax = !sel->ismax)) {
301		sel->rx = sel->x;
302		sel->ry = sel->y;
303		sel->rw = sel->w;
304		sel->rh = sel->h;
305		resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
306	}
307	else
308		resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
309	drawstatus();
310	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
311}
312
313void
314toggletag(const char *arg) {
315	unsigned int i, j;
316
317	if(!sel)
318		return;
319	i = idxoftag(arg);
320	sel->tags[i] = !sel->tags[i];
321	for(j = 0; j < ntags && !sel->tags[j]; j++);
322	if(j == ntags)
323		sel->tags[i] = True;
324	arrange();
325}
326
327void
328toggleview(const char *arg) {
329	unsigned int i, j;
330
331	i = idxoftag(arg);
332	seltags[i] = !seltags[i];
333	for(j = 0; j < ntags && !seltags[j]; j++);
334	if(j == ntags)
335		seltags[i] = True; /* cannot toggle last view */
336	arrange();
337}
338
339void
340updatebarpos(void) {
341	XEvent ev;
342
343	wax = sx;
344	way = sy;
345	wah = sh;
346	waw = sw;
347	switch(bpos) {
348	default:
349		wah -= bh;
350		way += bh;
351		XMoveWindow(dpy, barwin, sx, sy);
352		break;
353	case BarBot:
354		wah -= bh;
355		XMoveWindow(dpy, barwin, sx, sy + wah);
356		break;
357	case BarOff:
358		XMoveWindow(dpy, barwin, sx, sy - bh);
359		break;
360	}
361	XSync(dpy, False);
362	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
363}
364
365void
366view(const char *arg) {
367	unsigned int i;
368
369	for(i = 0; i < ntags; i++)
370		seltags[i] = arg == NULL;
371	i = idxoftag(arg);
372	if(i >= 0 && i < ntags)
373		seltags[i] = True;
374	arrange();
375}