dwm.c (view raw)
1/* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains an array of Bools of the same size as the
20 * global tags array to indicate the tags of a client. For each client dwm
21 * creates a small title window, which is resized whenever the (_NET_)WM_NAME
22 * properties are updated or the client is moved/resized.
23 *
24 * Keys and tagging rules are organized as arrays and defined in config.h.
25 *
26 * To understand everything else, start reading main().
27 */
28#include <errno.h>
29#include <locale.h>
30#include <stdarg.h>
31#include <stdio.h>
32#include <stdlib.h>
33#include <string.h>
34#include <unistd.h>
35#include <sys/select.h>
36#include <sys/types.h>
37#include <sys/wait.h>
38#include <regex.h>
39#include <X11/cursorfont.h>
40#include <X11/keysym.h>
41#include <X11/Xatom.h>
42#include <X11/Xlib.h>
43#include <X11/Xproto.h>
44#include <X11/Xutil.h>
45
46#include "dwm.h"
47
48/* macros */
49#define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
50#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
51#define MOUSEMASK (BUTTONMASK | PointerMotionMask)
52
53void
54applyrules(Client *c) {
55 static char buf[512];
56 unsigned int i, j;
57 regmatch_t tmp;
58 Bool matched = False;
59 XClassHint ch = { 0 };
60
61 /* rule matching */
62 XGetClassHint(dpy, c->win, &ch);
63 snprintf(buf, sizeof buf, "%s:%s:%s",
64 ch.res_class ? ch.res_class : "",
65 ch.res_name ? ch.res_name : "", c->name);
66 for(i = 0; i < nrules; i++)
67 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
68 c->isfloating = rules[i].isfloating;
69 for(j = 0; regs[i].tagregex && j < ntags; j++) {
70 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
71 matched = True;
72 c->tags[j] = True;
73 }
74 }
75 }
76 if(ch.res_class)
77 XFree(ch.res_class);
78 if(ch.res_name)
79 XFree(ch.res_name);
80 if(!matched)
81 memcpy(c->tags, seltags, sizeof seltags);
82}
83
84void
85arrange(void) {
86 Client *c;
87
88 for(c = clients; c; c = c->next)
89 if(isvisible(c))
90 unban(c);
91 else
92 ban(c);
93 layouts[ltidx].arrange();
94 focus(NULL);
95 restack();
96}
97
98void
99attach(Client *c) {
100 if(clients)
101 clients->prev = c;
102 c->next = clients;
103 clients = c;
104}
105
106void
107attachstack(Client *c) {
108 c->snext = stack;
109 stack = c;
110}
111
112void
113ban(Client *c) {
114 if(c->isbanned)
115 return;
116 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
117 c->isbanned = True;
118}
119
120void
121buttonpress(XEvent *e) {
122 unsigned int i, x;
123 Client *c;
124 XButtonPressedEvent *ev = &e->xbutton;
125
126 if(barwin == ev->window) {
127 x = 0;
128 for(i = 0; i < ntags; i++) {
129 x += textw(tags[i]);
130 if(ev->x < x) {
131 if(ev->button == Button1) {
132 if(ev->state & MODKEY)
133 tag(tags[i]);
134 else
135 view(tags[i]);
136 }
137 else if(ev->button == Button3) {
138 if(ev->state & MODKEY)
139 toggletag(tags[i]);
140 else
141 toggleview(tags[i]);
142 }
143 return;
144 }
145 }
146 if((ev->x < x + blw) && ev->button == Button1)
147 setlayout(NULL);
148 }
149 else if((c = getclient(ev->window))) {
150 focus(c);
151 if(CLEANMASK(ev->state) != MODKEY)
152 return;
153 if(ev->button == Button1) {
154 if(isarrange(floating) || c->isfloating)
155 restack();
156 else
157 togglefloating(NULL);
158 movemouse(c);
159 }
160 else if(ev->button == Button2) {
161 if(ISTILE && !c->isfixed && c->isfloating)
162 togglefloating(NULL);
163 else
164 zoom(NULL);
165 }
166 else if(ev->button == Button3 && !c->isfixed) {
167 if(isarrange(floating) || c->isfloating)
168 restack();
169 else
170 togglefloating(NULL);
171 resizemouse(c);
172 }
173 }
174}
175
176void
177checkotherwm(void) {
178 otherwm = False;
179 XSetErrorHandler(xerrorstart);
180
181 /* this causes an error if some other window manager is running */
182 XSelectInput(dpy, root, SubstructureRedirectMask);
183 XSync(dpy, False);
184 if(otherwm)
185 eprint("dwm: another window manager is already running\n");
186 XSync(dpy, False);
187 XSetErrorHandler(NULL);
188 xerrorxlib = XSetErrorHandler(xerror);
189 XSync(dpy, False);
190}
191
192void
193cleanup(void) {
194 close(STDIN_FILENO);
195 while(stack) {
196 unban(stack);
197 unmanage(stack);
198 }
199 if(dc.font.set)
200 XFreeFontSet(dpy, dc.font.set);
201 else
202 XFreeFont(dpy, dc.font.xfont);
203 XUngrabKey(dpy, AnyKey, AnyModifier, root);
204 XFreePixmap(dpy, dc.drawable);
205 XFreeGC(dpy, dc.gc);
206 XDestroyWindow(dpy, barwin);
207 XFreeCursor(dpy, cursor[CurNormal]);
208 XFreeCursor(dpy, cursor[CurResize]);
209 XFreeCursor(dpy, cursor[CurMove]);
210 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
211 XSync(dpy, False);
212}
213
214void
215compileregs(void) {
216 unsigned int i;
217 regex_t *reg;
218
219 if(regs)
220 return;
221 nrules = sizeof rules / sizeof rules[0];
222 regs = emallocz(nrules * sizeof(Regs));
223 for(i = 0; i < nrules; i++) {
224 if(rules[i].prop) {
225 reg = emallocz(sizeof(regex_t));
226 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
227 free(reg);
228 else
229 regs[i].propregex = reg;
230 }
231 if(rules[i].tags) {
232 reg = emallocz(sizeof(regex_t));
233 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
234 free(reg);
235 else
236 regs[i].tagregex = reg;
237 }
238 }
239}
240
241void
242configure(Client *c) {
243 XConfigureEvent ce;
244
245 ce.type = ConfigureNotify;
246 ce.display = dpy;
247 ce.event = c->win;
248 ce.window = c->win;
249 ce.x = c->x;
250 ce.y = c->y;
251 ce.width = c->w;
252 ce.height = c->h;
253 ce.border_width = c->border;
254 ce.above = None;
255 ce.override_redirect = False;
256 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
257}
258
259void
260configurenotify(XEvent *e) {
261 XConfigureEvent *ev = &e->xconfigure;
262
263 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
264 sw = ev->width;
265 sh = ev->height;
266 XFreePixmap(dpy, dc.drawable);
267 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
268 XResizeWindow(dpy, barwin, sw, bh);
269 updatebarpos();
270 arrange();
271 }
272}
273
274void
275configurerequest(XEvent *e) {
276 Client *c;
277 XConfigureRequestEvent *ev = &e->xconfigurerequest;
278 XWindowChanges wc;
279
280 if((c = getclient(ev->window))) {
281 c->ismax = False;
282 if(ev->value_mask & CWBorderWidth)
283 c->border = ev->border_width;
284 if(c->isfixed || c->isfloating || isarrange(floating)) {
285 if(ev->value_mask & CWX)
286 c->x = ev->x;
287 if(ev->value_mask & CWY)
288 c->y = ev->y;
289 if(ev->value_mask & CWWidth)
290 c->w = ev->width;
291 if(ev->value_mask & CWHeight)
292 c->h = ev->height;
293 if((c->x + c->w) > sw && c->isfloating)
294 c->x = sw / 2 - c->w / 2; /* center in x direction */
295 if((c->y + c->h) > sh && c->isfloating)
296 c->y = sh / 2 - c->h / 2; /* center in y direction */
297 if((ev->value_mask & (CWX | CWY))
298 && !(ev->value_mask & (CWWidth | CWHeight)))
299 configure(c);
300 if(isvisible(c))
301 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
302 }
303 else
304 configure(c);
305 }
306 else {
307 wc.x = ev->x;
308 wc.y = ev->y;
309 wc.width = ev->width;
310 wc.height = ev->height;
311 wc.border_width = ev->border_width;
312 wc.sibling = ev->above;
313 wc.stack_mode = ev->detail;
314 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
315 }
316 XSync(dpy, False);
317}
318
319void
320destroynotify(XEvent *e) {
321 Client *c;
322 XDestroyWindowEvent *ev = &e->xdestroywindow;
323
324 if((c = getclient(ev->window)))
325 unmanage(c);
326}
327
328void
329detach(Client *c) {
330 if(c->prev)
331 c->prev->next = c->next;
332 if(c->next)
333 c->next->prev = c->prev;
334 if(c == clients)
335 clients = c->next;
336 c->next = c->prev = NULL;
337}
338
339void
340detachstack(Client *c) {
341 Client **tc;
342
343 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
344 *tc = c->snext;
345}
346
347void
348drawbar(void) {
349 int i, x;
350
351 dc.x = dc.y = 0;
352 for(i = 0; i < ntags; i++) {
353 dc.w = textw(tags[i]);
354 if(seltags[i]) {
355 drawtext(tags[i], dc.sel);
356 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
357 }
358 else {
359 drawtext(tags[i], dc.norm);
360 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
361 }
362 dc.x += dc.w;
363 }
364 dc.w = blw;
365 drawtext(layouts[ltidx].symbol, dc.norm);
366 x = dc.x + dc.w;
367 dc.w = textw(stext);
368 dc.x = sw - dc.w;
369 if(dc.x < x) {
370 dc.x = x;
371 dc.w = sw - x;
372 }
373 drawtext(stext, dc.norm);
374 if((dc.w = dc.x - x) > bh) {
375 dc.x = x;
376 if(sel) {
377 drawtext(sel->name, dc.sel);
378 drawsquare(sel->ismax, sel->isfloating, dc.sel);
379 }
380 else
381 drawtext(NULL, dc.norm);
382 }
383 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
384 XSync(dpy, False);
385}
386
387void
388drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
389 int x;
390 XGCValues gcv;
391 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
392
393 gcv.foreground = col[ColFG];
394 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
395 x = (dc.font.ascent + dc.font.descent + 2) / 4;
396 r.x = dc.x + 1;
397 r.y = dc.y + 1;
398 if(filled) {
399 r.width = r.height = x + 1;
400 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
401 }
402 else if(empty) {
403 r.width = r.height = x;
404 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
405 }
406}
407
408void
409drawtext(const char *text, unsigned long col[ColLast]) {
410 int x, y, w, h;
411 static char buf[256];
412 unsigned int len, olen;
413 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
414
415 XSetForeground(dpy, dc.gc, col[ColBG]);
416 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
417 if(!text)
418 return;
419 w = 0;
420 olen = len = strlen(text);
421 if(len >= sizeof buf)
422 len = sizeof buf - 1;
423 memcpy(buf, text, len);
424 buf[len] = 0;
425 h = dc.font.ascent + dc.font.descent;
426 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
427 x = dc.x + (h / 2);
428 /* shorten text if necessary */
429 while(len && (w = textnw(buf, len)) > dc.w - h)
430 buf[--len] = 0;
431 if(len < olen) {
432 if(len > 1)
433 buf[len - 1] = '.';
434 if(len > 2)
435 buf[len - 2] = '.';
436 if(len > 3)
437 buf[len - 3] = '.';
438 }
439 if(w > dc.w)
440 return; /* too long */
441 XSetForeground(dpy, dc.gc, col[ColFG]);
442 if(dc.font.set)
443 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
444 else
445 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
446}
447
448void *
449emallocz(unsigned int size) {
450 void *res = calloc(1, size);
451
452 if(!res)
453 eprint("fatal: could not malloc() %u bytes\n", size);
454 return res;
455}
456
457void
458enternotify(XEvent *e) {
459 Client *c;
460 XCrossingEvent *ev = &e->xcrossing;
461
462 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
463 return;
464 if((c = getclient(ev->window)))
465 focus(c);
466 else if(ev->window == root) {
467 selscreen = True;
468 focus(NULL);
469 }
470}
471
472void
473eprint(const char *errstr, ...) {
474 va_list ap;
475
476 va_start(ap, errstr);
477 vfprintf(stderr, errstr, ap);
478 va_end(ap);
479 exit(EXIT_FAILURE);
480}
481
482void
483expose(XEvent *e) {
484 XExposeEvent *ev = &e->xexpose;
485
486 if(ev->count == 0) {
487 if(barwin == ev->window)
488 drawbar();
489 }
490}
491
492void
493floating(void) { /* default floating layout */
494 Client *c;
495
496 for(c = clients; c; c = c->next)
497 if(isvisible(c))
498 resize(c, c->x, c->y, c->w, c->h, True);
499}
500
501void
502focus(Client *c) {
503 if((!c && selscreen) || (c && !isvisible(c)))
504 for(c = stack; c && !isvisible(c); c = c->snext);
505 if(sel && sel != c) {
506 grabbuttons(sel, False);
507 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
508 }
509 if(c) {
510 detachstack(c);
511 attachstack(c);
512 grabbuttons(c, True);
513 }
514 sel = c;
515 drawbar();
516 if(!selscreen)
517 return;
518 if(c) {
519 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
520 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
521 }
522 else
523 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
524}
525
526void
527focusnext(const char *arg) {
528 Client *c;
529
530 if(!sel)
531 return;
532 for(c = sel->next; c && !isvisible(c); c = c->next);
533 if(!c)
534 for(c = clients; c && !isvisible(c); c = c->next);
535 if(c) {
536 focus(c);
537 restack();
538 }
539}
540
541void
542focusprev(const char *arg) {
543 Client *c;
544
545 if(!sel)
546 return;
547 for(c = sel->prev; c && !isvisible(c); c = c->prev);
548 if(!c) {
549 for(c = clients; c && c->next; c = c->next);
550 for(; c && !isvisible(c); c = c->prev);
551 }
552 if(c) {
553 focus(c);
554 restack();
555 }
556}
557
558Client *
559getclient(Window w) {
560 Client *c;
561
562 for(c = clients; c && c->win != w; c = c->next);
563 return c;
564}
565
566unsigned long
567getcolor(const char *colstr) {
568 Colormap cmap = DefaultColormap(dpy, screen);
569 XColor color;
570
571 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
572 eprint("error, cannot allocate color '%s'\n", colstr);
573 return color.pixel;
574}
575
576long
577getstate(Window w) {
578 int format, status;
579 long result = -1;
580 unsigned char *p = NULL;
581 unsigned long n, extra;
582 Atom real;
583
584 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
585 &real, &format, &n, &extra, (unsigned char **)&p);
586 if(status != Success)
587 return -1;
588 if(n != 0)
589 result = *p;
590 XFree(p);
591 return result;
592}
593
594Bool
595gettextprop(Window w, Atom atom, char *text, unsigned int size) {
596 char **list = NULL;
597 int n;
598 XTextProperty name;
599
600 if(!text || size == 0)
601 return False;
602 text[0] = '\0';
603 XGetTextProperty(dpy, w, &name, atom);
604 if(!name.nitems)
605 return False;
606 if(name.encoding == XA_STRING)
607 strncpy(text, (char *)name.value, size - 1);
608 else {
609 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
610 && n > 0 && *list)
611 {
612 strncpy(text, *list, size - 1);
613 XFreeStringList(list);
614 }
615 }
616 text[size - 1] = '\0';
617 XFree(name.value);
618 return True;
619}
620
621void
622grabbuttons(Client *c, Bool focused) {
623 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
624
625 if(focused) {
626 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
627 GrabModeAsync, GrabModeSync, None, None);
628 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
629 GrabModeAsync, GrabModeSync, None, None);
630 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
631 GrabModeAsync, GrabModeSync, None, None);
632 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
633 GrabModeAsync, GrabModeSync, None, None);
634
635 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
636 GrabModeAsync, GrabModeSync, None, None);
637 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
638 GrabModeAsync, GrabModeSync, None, None);
639 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
640 GrabModeAsync, GrabModeSync, None, None);
641 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
642 GrabModeAsync, GrabModeSync, None, None);
643
644 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
645 GrabModeAsync, GrabModeSync, None, None);
646 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
647 GrabModeAsync, GrabModeSync, None, None);
648 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
649 GrabModeAsync, GrabModeSync, None, None);
650 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
651 GrabModeAsync, GrabModeSync, None, None);
652 }
653 else
654 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
655 GrabModeAsync, GrabModeSync, None, None);
656}
657
658unsigned int
659idxoftag(const char *tag) {
660 unsigned int i;
661
662 for(i = 0; i < ntags; i++)
663 if(tags[i] == tag)
664 return i;
665 return 0;
666}
667
668void
669initfont(const char *fontstr) {
670 char *def, **missing;
671 int i, n;
672
673 missing = NULL;
674 if(dc.font.set)
675 XFreeFontSet(dpy, dc.font.set);
676 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
677 if(missing) {
678 while(n--)
679 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
680 XFreeStringList(missing);
681 }
682 if(dc.font.set) {
683 XFontSetExtents *font_extents;
684 XFontStruct **xfonts;
685 char **font_names;
686 dc.font.ascent = dc.font.descent = 0;
687 font_extents = XExtentsOfFontSet(dc.font.set);
688 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
689 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
690 if(dc.font.ascent < (*xfonts)->ascent)
691 dc.font.ascent = (*xfonts)->ascent;
692 if(dc.font.descent < (*xfonts)->descent)
693 dc.font.descent = (*xfonts)->descent;
694 xfonts++;
695 }
696 }
697 else {
698 if(dc.font.xfont)
699 XFreeFont(dpy, dc.font.xfont);
700 dc.font.xfont = NULL;
701 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
702 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
703 eprint("error, cannot load font: '%s'\n", fontstr);
704 dc.font.ascent = dc.font.xfont->ascent;
705 dc.font.descent = dc.font.xfont->descent;
706 }
707 dc.font.height = dc.font.ascent + dc.font.descent;
708}
709
710Bool
711isarrange(void (*func)())
712{
713 return func == layouts[ltidx].arrange;
714}
715
716Bool
717isoccupied(unsigned int t) {
718 Client *c;
719
720 for(c = clients; c; c = c->next)
721 if(c->tags[t])
722 return True;
723 return False;
724}
725
726Bool
727isprotodel(Client *c) {
728 int i, n;
729 Atom *protocols;
730 Bool ret = False;
731
732 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
733 for(i = 0; !ret && i < n; i++)
734 if(protocols[i] == wmatom[WMDelete])
735 ret = True;
736 XFree(protocols);
737 }
738 return ret;
739}
740
741Bool
742isvisible(Client *c) {
743 unsigned int i;
744
745 for(i = 0; i < ntags; i++)
746 if(c->tags[i] && seltags[i])
747 return True;
748 return False;
749}
750
751void
752keypress(XEvent *e) {
753 KEYS
754 unsigned int len = sizeof keys / sizeof keys[0];
755 unsigned int i;
756 KeyCode code;
757 KeySym keysym;
758 XKeyEvent *ev;
759
760 if(!e) { /* grabkeys */
761 XUngrabKey(dpy, AnyKey, AnyModifier, root);
762 for(i = 0; i < len; i++) {
763 code = XKeysymToKeycode(dpy, keys[i].keysym);
764 XGrabKey(dpy, code, keys[i].mod, root, True,
765 GrabModeAsync, GrabModeAsync);
766 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
767 GrabModeAsync, GrabModeAsync);
768 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
769 GrabModeAsync, GrabModeAsync);
770 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
771 GrabModeAsync, GrabModeAsync);
772 }
773 return;
774 }
775 ev = &e->xkey;
776 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
777 for(i = 0; i < len; i++)
778 if(keysym == keys[i].keysym
779 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
780 {
781 if(keys[i].func)
782 keys[i].func(keys[i].arg);
783 }
784}
785
786void
787killclient(const char *arg) {
788 XEvent ev;
789
790 if(!sel)
791 return;
792 if(isprotodel(sel)) {
793 ev.type = ClientMessage;
794 ev.xclient.window = sel->win;
795 ev.xclient.message_type = wmatom[WMProtocols];
796 ev.xclient.format = 32;
797 ev.xclient.data.l[0] = wmatom[WMDelete];
798 ev.xclient.data.l[1] = CurrentTime;
799 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
800 }
801 else
802 XKillClient(dpy, sel->win);
803}
804
805void
806leavenotify(XEvent *e) {
807 XCrossingEvent *ev = &e->xcrossing;
808
809 if((ev->window == root) && !ev->same_screen) {
810 selscreen = False;
811 focus(NULL);
812 }
813}
814
815void
816manage(Window w, XWindowAttributes *wa) {
817 Client *c, *t = NULL;
818 Window trans;
819 Status rettrans;
820 XWindowChanges wc;
821
822 c = emallocz(sizeof(Client));
823 c->tags = emallocz(sizeof seltags);
824 c->win = w;
825 c->x = wa->x;
826 c->y = wa->y;
827 c->w = wa->width;
828 c->h = wa->height;
829 c->oldborder = wa->border_width;
830 if(c->w == sw && c->h == sh) {
831 c->x = sx;
832 c->y = sy;
833 c->border = wa->border_width;
834 }
835 else {
836 if(c->x + c->w + 2 * c->border > wax + waw)
837 c->x = wax + waw - c->w - 2 * c->border;
838 if(c->y + c->h + 2 * c->border > way + wah)
839 c->y = way + wah - c->h - 2 * c->border;
840 if(c->x < wax)
841 c->x = wax;
842 if(c->y < way)
843 c->y = way;
844 c->border = BORDERPX;
845 }
846 wc.border_width = c->border;
847 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
848 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
849 configure(c); /* propagates border_width, if size doesn't change */
850 updatesizehints(c);
851 XSelectInput(dpy, w,
852 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
853 grabbuttons(c, False);
854 updatetitle(c);
855 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
856 for(t = clients; t && t->win != trans; t = t->next);
857 if(t)
858 memcpy(c->tags, t->tags, sizeof seltags);
859 applyrules(c);
860 if(!c->isfloating)
861 c->isfloating = (rettrans == Success) || c->isfixed;
862 attach(c);
863 attachstack(c);
864 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
865 ban(c);
866 XMapWindow(dpy, c->win);
867 setclientstate(c, NormalState);
868 arrange();
869}
870
871void
872mappingnotify(XEvent *e) {
873 XMappingEvent *ev = &e->xmapping;
874
875 XRefreshKeyboardMapping(ev);
876 if(ev->request == MappingKeyboard)
877 keypress(NULL);
878}
879
880void
881maprequest(XEvent *e) {
882 static XWindowAttributes wa;
883 XMapRequestEvent *ev = &e->xmaprequest;
884
885 if(!XGetWindowAttributes(dpy, ev->window, &wa))
886 return;
887 if(wa.override_redirect)
888 return;
889 if(!getclient(ev->window))
890 manage(ev->window, &wa);
891}
892
893void
894movemouse(Client *c) {
895 int x1, y1, ocx, ocy, di, nx, ny;
896 unsigned int dui;
897 Window dummy;
898 XEvent ev;
899
900 ocx = nx = c->x;
901 ocy = ny = c->y;
902 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
903 None, cursor[CurMove], CurrentTime) != GrabSuccess)
904 return;
905 c->ismax = False;
906 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
907 for(;;) {
908 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
909 switch (ev.type) {
910 case ButtonRelease:
911 XUngrabPointer(dpy, CurrentTime);
912 return;
913 case ConfigureRequest:
914 case Expose:
915 case MapRequest:
916 handler[ev.type](&ev);
917 break;
918 case MotionNotify:
919 XSync(dpy, False);
920 nx = ocx + (ev.xmotion.x - x1);
921 ny = ocy + (ev.xmotion.y - y1);
922 if(abs(wax + nx) < SNAP)
923 nx = wax;
924 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
925 nx = wax + waw - c->w - 2 * c->border;
926 if(abs(way - ny) < SNAP)
927 ny = way;
928 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
929 ny = way + wah - c->h - 2 * c->border;
930 resize(c, nx, ny, c->w, c->h, False);
931 break;
932 }
933 }
934}
935
936Client *
937nexttiled(Client *c) {
938 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
939 return c;
940}
941
942void
943propertynotify(XEvent *e) {
944 Client *c;
945 Window trans;
946 XPropertyEvent *ev = &e->xproperty;
947
948 if(ev->state == PropertyDelete)
949 return; /* ignore */
950 if((c = getclient(ev->window))) {
951 switch (ev->atom) {
952 default: break;
953 case XA_WM_TRANSIENT_FOR:
954 XGetTransientForHint(dpy, c->win, &trans);
955 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
956 arrange();
957 break;
958 case XA_WM_NORMAL_HINTS:
959 updatesizehints(c);
960 break;
961 }
962 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
963 updatetitle(c);
964 if(c == sel)
965 drawbar();
966 }
967 }
968}
969
970void
971quit(const char *arg) {
972 readin = running = False;
973}
974
975void
976resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
977 XWindowChanges wc;
978
979 if(sizehints) {
980 /* set minimum possible */
981 if (w < 1)
982 w = 1;
983 if (h < 1)
984 h = 1;
985
986 /* temporarily remove base dimensions */
987 w -= c->basew;
988 h -= c->baseh;
989
990 /* adjust for aspect limits */
991 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
992 if (w * c->maxay > h * c->maxax)
993 w = h * c->maxax / c->maxay;
994 else if (w * c->minay < h * c->minax)
995 h = w * c->minay / c->minax;
996 }
997
998 /* adjust for increment value */
999 if(c->incw)
1000 w -= w % c->incw;
1001 if(c->inch)
1002 h -= h % c->inch;
1003
1004 /* restore base dimensions */
1005 w += c->basew;
1006 h += c->baseh;
1007
1008 if(c->minw > 0 && w < c->minw)
1009 w = c->minw;
1010 if(c->minh > 0 && h < c->minh)
1011 h = c->minh;
1012 if(c->maxw > 0 && w > c->maxw)
1013 w = c->maxw;
1014 if(c->maxh > 0 && h > c->maxh)
1015 h = c->maxh;
1016 }
1017 if(w <= 0 || h <= 0)
1018 return;
1019 /* offscreen appearance fixes */
1020 if(x > sw)
1021 x = sw - w - 2 * c->border;
1022 if(y > sh)
1023 y = sh - h - 2 * c->border;
1024 if(x + w + 2 * c->border < sx)
1025 x = sx;
1026 if(y + h + 2 * c->border < sy)
1027 y = sy;
1028 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1029 c->x = wc.x = x;
1030 c->y = wc.y = y;
1031 c->w = wc.width = w;
1032 c->h = wc.height = h;
1033 wc.border_width = c->border;
1034 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1035 configure(c);
1036 XSync(dpy, False);
1037 }
1038}
1039
1040void
1041resizemouse(Client *c) {
1042 int ocx, ocy;
1043 int nw, nh;
1044 XEvent ev;
1045
1046 ocx = c->x;
1047 ocy = c->y;
1048 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1049 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1050 return;
1051 c->ismax = False;
1052 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1053 for(;;) {
1054 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1055 switch(ev.type) {
1056 case ButtonRelease:
1057 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1058 c->w + c->border - 1, c->h + c->border - 1);
1059 XUngrabPointer(dpy, CurrentTime);
1060 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1061 return;
1062 case ConfigureRequest:
1063 case Expose:
1064 case MapRequest:
1065 handler[ev.type](&ev);
1066 break;
1067 case MotionNotify:
1068 XSync(dpy, False);
1069 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1070 nw = 1;
1071 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1072 nh = 1;
1073 resize(c, c->x, c->y, nw, nh, True);
1074 break;
1075 }
1076 }
1077}
1078
1079void
1080restack(void) {
1081 Client *c;
1082 XEvent ev;
1083 XWindowChanges wc;
1084
1085 drawbar();
1086 if(!sel)
1087 return;
1088 if(sel->isfloating || isarrange(floating))
1089 XRaiseWindow(dpy, sel->win);
1090 if(!isarrange(floating)) {
1091 wc.stack_mode = Below;
1092 wc.sibling = barwin;
1093 if(!sel->isfloating) {
1094 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1095 wc.sibling = sel->win;
1096 }
1097 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1098 if(c == sel)
1099 continue;
1100 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1101 wc.sibling = c->win;
1102 }
1103 }
1104 XSync(dpy, False);
1105 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1106}
1107
1108void
1109run(void) {
1110 char *p;
1111 int r, xfd;
1112 fd_set rd;
1113 XEvent ev;
1114
1115 /* main event loop, also reads status text from stdin */
1116 XSync(dpy, False);
1117 xfd = ConnectionNumber(dpy);
1118 readin = True;
1119 while(running) {
1120 FD_ZERO(&rd);
1121 if(readin)
1122 FD_SET(STDIN_FILENO, &rd);
1123 FD_SET(xfd, &rd);
1124 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1125 if(errno == EINTR)
1126 continue;
1127 eprint("select failed\n");
1128 }
1129 if(FD_ISSET(STDIN_FILENO, &rd)) {
1130 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1131 case -1:
1132 strncpy(stext, strerror(errno), sizeof stext - 1);
1133 stext[sizeof stext - 1] = '\0';
1134 readin = False;
1135 break;
1136 case 0:
1137 strncpy(stext, "EOF", 4);
1138 readin = False;
1139 break;
1140 default:
1141 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1142 for(; p >= stext && *p != '\n'; --p);
1143 if(p > stext)
1144 strncpy(stext, p + 1, sizeof stext);
1145 }
1146 drawbar();
1147 }
1148 while(XPending(dpy)) {
1149 XNextEvent(dpy, &ev);
1150 if(handler[ev.type])
1151 (handler[ev.type])(&ev); /* call handler */
1152 }
1153 }
1154}
1155
1156void
1157scan(void) {
1158 unsigned int i, num;
1159 Window *wins, d1, d2;
1160 XWindowAttributes wa;
1161
1162 wins = NULL;
1163 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1164 for(i = 0; i < num; i++) {
1165 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1166 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1167 continue;
1168 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1169 manage(wins[i], &wa);
1170 }
1171 for(i = 0; i < num; i++) { /* now the transients */
1172 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1173 continue;
1174 if(XGetTransientForHint(dpy, wins[i], &d1)
1175 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1176 manage(wins[i], &wa);
1177 }
1178 }
1179 if(wins)
1180 XFree(wins);
1181}
1182
1183void
1184setclientstate(Client *c, long state) {
1185 long data[] = {state, None};
1186
1187 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1188 PropModeReplace, (unsigned char *)data, 2);
1189}
1190
1191void
1192setlayout(const char *arg) {
1193 unsigned int i;
1194
1195 if(!arg) {
1196 if(++ltidx == nlayouts)
1197 ltidx = 0;;
1198 }
1199 else {
1200 for(i = 0; i < nlayouts; i++)
1201 if(!strcmp(arg, layouts[i].symbol))
1202 break;
1203 if(i == nlayouts)
1204 return;
1205 ltidx = i;
1206 }
1207 if(sel)
1208 arrange();
1209 else
1210 drawbar();
1211}
1212
1213void
1214setmwfact(const char *arg) {
1215 double delta;
1216
1217 if(!ISTILE)
1218 return;
1219 /* arg handling, manipulate mwfact */
1220 if(arg == NULL)
1221 mwfact = MWFACT;
1222 else if(1 == sscanf(arg, "%lf", &delta)) {
1223 if(arg[0] == '+' || arg[0] == '-')
1224 mwfact += delta;
1225 else
1226 mwfact = delta;
1227 if(mwfact < 0.1)
1228 mwfact = 0.1;
1229 else if(mwfact > 0.9)
1230 mwfact = 0.9;
1231 }
1232 arrange();
1233}
1234
1235void
1236setup(void) {
1237 int d;
1238 unsigned int i, j, mask;
1239 Window w;
1240 XModifierKeymap *modmap;
1241 XSetWindowAttributes wa;
1242
1243 /* init atoms */
1244 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1245 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1246 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1247 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1248 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1249 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1250 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1251 PropModeReplace, (unsigned char *) netatom, NetLast);
1252
1253 /* init cursors */
1254 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1255 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1256 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1257
1258 /* init geometry */
1259 sx = sy = 0;
1260 sw = DisplayWidth(dpy, screen);
1261 sh = DisplayHeight(dpy, screen);
1262
1263 /* init modifier map */
1264 modmap = XGetModifierMapping(dpy);
1265 for(i = 0; i < 8; i++)
1266 for(j = 0; j < modmap->max_keypermod; j++) {
1267 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1268 == XKeysymToKeycode(dpy, XK_Num_Lock))
1269 numlockmask = (1 << i);
1270 }
1271 XFreeModifiermap(modmap);
1272
1273 /* select for events */
1274 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1275 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1276 wa.cursor = cursor[CurNormal];
1277 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1278 XSelectInput(dpy, root, wa.event_mask);
1279
1280 /* grab keys */
1281 keypress(NULL);
1282
1283 /* init tags */
1284 compileregs();
1285
1286 /* init appearance */
1287 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1288 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1289 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1290 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1291 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1292 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1293 initfont(FONT);
1294 dc.h = bh = dc.font.height + 2;
1295
1296 /* init layouts */
1297 mwfact = MWFACT;
1298 nlayouts = sizeof layouts / sizeof layouts[0];
1299 for(blw = i = 0; i < nlayouts; i++) {
1300 j = textw(layouts[i].symbol);
1301 if(j > blw)
1302 blw = j;
1303 }
1304
1305 /* init bar */
1306 bpos = BARPOS;
1307 wa.override_redirect = 1;
1308 wa.background_pixmap = ParentRelative;
1309 wa.event_mask = ButtonPressMask | ExposureMask;
1310 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1311 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1312 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1313 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1314 updatebarpos();
1315 XMapRaised(dpy, barwin);
1316 strcpy(stext, "dwm-"VERSION);
1317 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1318 dc.gc = XCreateGC(dpy, root, 0, 0);
1319 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1320 if(!dc.font.set)
1321 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1322
1323 /* multihead support */
1324 selscreen = XQueryPointer(dpy, root, &w, &w, &d, &d, &d, &d, &mask);
1325}
1326
1327void
1328spawn(const char *arg) {
1329 static char *shell = NULL;
1330
1331 if(!shell && !(shell = getenv("SHELL")))
1332 shell = "/bin/sh";
1333 if(!arg)
1334 return;
1335 /* The double-fork construct avoids zombie processes and keeps the code
1336 * clean from stupid signal handlers. */
1337 if(fork() == 0) {
1338 if(fork() == 0) {
1339 if(dpy)
1340 close(ConnectionNumber(dpy));
1341 setsid();
1342 execl(shell, shell, "-c", arg, (char *)NULL);
1343 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1344 perror(" failed");
1345 }
1346 exit(0);
1347 }
1348 wait(0);
1349}
1350
1351void
1352tag(const char *arg) {
1353 unsigned int i;
1354
1355 if(!sel)
1356 return;
1357 for(i = 0; i < ntags; i++)
1358 sel->tags[i] = arg == NULL;
1359 i = idxoftag(arg);
1360 if(i >= 0 && i < ntags)
1361 sel->tags[i] = True;
1362 arrange();
1363}
1364
1365unsigned int
1366textnw(const char *text, unsigned int len) {
1367 XRectangle r;
1368
1369 if(dc.font.set) {
1370 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1371 return r.width;
1372 }
1373 return XTextWidth(dc.font.xfont, text, len);
1374}
1375
1376unsigned int
1377textw(const char *text) {
1378 return textnw(text, strlen(text)) + dc.font.height;
1379}
1380
1381void
1382tile(void) {
1383 unsigned int i, n, nx, ny, nw, nh, mw, th;
1384 Client *c, *mc;
1385
1386 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1387 n++;
1388
1389 /* window geoms */
1390 mw = (n == 1) ? waw : mwfact * waw;
1391 th = (n > 1) ? wah / (n - 1) : 0;
1392 if(n > 1 && th < bh)
1393 th = wah;
1394
1395 nx = wax;
1396 ny = way;
1397 nw = 0; /* gcc stupidity requires this */
1398 for(i = 0, c = mc = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1399 c->ismax = False;
1400 if(i == 0) { /* master */
1401 nw = mw - 2 * c->border;
1402 nh = wah - 2 * c->border;
1403 }
1404 else { /* tile window */
1405 if(i == 1) {
1406 ny = way;
1407 nx += mc->w + 2 * mc->border;
1408 nw = waw - nx - 2 * c->border;
1409 }
1410 if(i + 1 == n) /* remainder */
1411 nh = (way + wah) - ny - 2 * c->border;
1412 else
1413 nh = th - 2 * c->border;
1414 }
1415 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1416 if(n > 1 && th != wah)
1417 ny = c->y + c->h + 2 * c->border;
1418 }
1419}
1420
1421void
1422togglebar(const char *arg) {
1423 if(bpos == BarOff)
1424 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1425 else
1426 bpos = BarOff;
1427 updatebarpos();
1428 arrange();
1429}
1430
1431void
1432togglefloating(const char *arg) {
1433 if(!sel)
1434 return;
1435 sel->isfloating = !sel->isfloating;
1436 if(sel->isfloating)
1437 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1438 arrange();
1439}
1440
1441void
1442togglemax(const char *arg) {
1443 XEvent ev;
1444
1445 if(!sel || sel->isfixed)
1446 return;
1447 if((sel->ismax = !sel->ismax)) {
1448 if(isarrange(floating) || sel->isfloating)
1449 sel->wasfloating = True;
1450 else {
1451 togglefloating(NULL);
1452 sel->wasfloating = False;
1453 }
1454 sel->rx = sel->x;
1455 sel->ry = sel->y;
1456 sel->rw = sel->w;
1457 sel->rh = sel->h;
1458 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1459 }
1460 else {
1461 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1462 if(!sel->wasfloating)
1463 togglefloating(NULL);
1464 }
1465 drawbar();
1466 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1467}
1468
1469void
1470toggletag(const char *arg) {
1471 unsigned int i, j;
1472
1473 if(!sel)
1474 return;
1475 i = idxoftag(arg);
1476 sel->tags[i] = !sel->tags[i];
1477 for(j = 0; j < ntags && !sel->tags[j]; j++);
1478 if(j == ntags)
1479 sel->tags[i] = True;
1480 arrange();
1481}
1482
1483void
1484toggleview(const char *arg) {
1485 unsigned int i, j;
1486
1487 i = idxoftag(arg);
1488 seltags[i] = !seltags[i];
1489 for(j = 0; j < ntags && !seltags[j]; j++);
1490 if(j == ntags)
1491 seltags[i] = True; /* at least one tag must be viewed */
1492 arrange();
1493}
1494
1495void
1496unban(Client *c) {
1497 if(!c->isbanned)
1498 return;
1499 XMoveWindow(dpy, c->win, c->x, c->y);
1500 c->isbanned = False;
1501}
1502
1503void
1504unmanage(Client *c) {
1505 XWindowChanges wc;
1506
1507 wc.border_width = c->oldborder;
1508 /* The server grab construct avoids race conditions. */
1509 XGrabServer(dpy);
1510 XSetErrorHandler(xerrordummy);
1511 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1512 detach(c);
1513 detachstack(c);
1514 if(sel == c)
1515 focus(NULL);
1516 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1517 setclientstate(c, WithdrawnState);
1518 free(c->tags);
1519 free(c);
1520 XSync(dpy, False);
1521 XSetErrorHandler(xerror);
1522 XUngrabServer(dpy);
1523 arrange();
1524}
1525
1526void
1527unmapnotify(XEvent *e) {
1528 Client *c;
1529 XUnmapEvent *ev = &e->xunmap;
1530
1531 if((c = getclient(ev->window)))
1532 unmanage(c);
1533}
1534
1535void
1536updatebarpos(void) {
1537 XEvent ev;
1538
1539 wax = sx;
1540 way = sy;
1541 wah = sh;
1542 waw = sw;
1543 switch(bpos) {
1544 default:
1545 wah -= bh;
1546 way += bh;
1547 XMoveWindow(dpy, barwin, sx, sy);
1548 break;
1549 case BarBot:
1550 wah -= bh;
1551 XMoveWindow(dpy, barwin, sx, sy + wah);
1552 break;
1553 case BarOff:
1554 XMoveWindow(dpy, barwin, sx, sy - bh);
1555 break;
1556 }
1557 XSync(dpy, False);
1558 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1559}
1560
1561void
1562updatesizehints(Client *c) {
1563 long msize;
1564 XSizeHints size;
1565
1566 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1567 size.flags = PSize;
1568 c->flags = size.flags;
1569 if(c->flags & PBaseSize) {
1570 c->basew = size.base_width;
1571 c->baseh = size.base_height;
1572 }
1573 else if(c->flags & PMinSize) {
1574 c->basew = size.min_width;
1575 c->baseh = size.min_height;
1576 }
1577 else
1578 c->basew = c->baseh = 0;
1579 if(c->flags & PResizeInc) {
1580 c->incw = size.width_inc;
1581 c->inch = size.height_inc;
1582 }
1583 else
1584 c->incw = c->inch = 0;
1585 if(c->flags & PMaxSize) {
1586 c->maxw = size.max_width;
1587 c->maxh = size.max_height;
1588 }
1589 else
1590 c->maxw = c->maxh = 0;
1591 if(c->flags & PMinSize) {
1592 c->minw = size.min_width;
1593 c->minh = size.min_height;
1594 }
1595 else if(c->flags & PBaseSize) {
1596 c->minw = size.base_width;
1597 c->minh = size.base_height;
1598 }
1599 else
1600 c->minw = c->minh = 0;
1601 if(c->flags & PAspect) {
1602 c->minax = size.min_aspect.x;
1603 c->maxax = size.max_aspect.x;
1604 c->minay = size.min_aspect.y;
1605 c->maxay = size.max_aspect.y;
1606 }
1607 else
1608 c->minax = c->maxax = c->minay = c->maxay = 0;
1609 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1610 && c->maxw == c->minw && c->maxh == c->minh);
1611}
1612
1613void
1614updatetitle(Client *c) {
1615 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1616 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1617}
1618
1619/* There's no way to check accesses to destroyed windows, thus those cases are
1620 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1621 * default error handler, which may call exit. */
1622int
1623xerror(Display *dpy, XErrorEvent *ee) {
1624 if(ee->error_code == BadWindow
1625 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1626 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1627 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1628 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1629 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1630 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1631 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1632 return 0;
1633 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1634 ee->request_code, ee->error_code);
1635 return xerrorxlib(dpy, ee); /* may call exit */
1636}
1637
1638int
1639xerrordummy(Display *dsply, XErrorEvent *ee) {
1640 return 0;
1641}
1642
1643/* Startup Error handler to check if another window manager
1644 * is already running. */
1645int
1646xerrorstart(Display *dsply, XErrorEvent *ee) {
1647 otherwm = True;
1648 return -1;
1649}
1650
1651void
1652view(const char *arg) {
1653 unsigned int i;
1654
1655 memcpy(prevtags, seltags, sizeof seltags);
1656 for(i = 0; i < ntags; i++)
1657 seltags[i] = arg == NULL;
1658 i = idxoftag(arg);
1659 if(i >= 0 && i < ntags)
1660 seltags[i] = True;
1661 arrange();
1662}
1663
1664void
1665viewprevtag(const char *arg) {
1666 static Bool tmptags[sizeof tags / sizeof tags[0]];
1667
1668 memcpy(tmptags, seltags, sizeof seltags);
1669 memcpy(seltags, prevtags, sizeof seltags);
1670 memcpy(prevtags, tmptags, sizeof seltags);
1671 arrange();
1672}
1673
1674void
1675zoom(const char *arg) {
1676 Client *c;
1677
1678 if(!sel || !ISTILE || sel->isfloating)
1679 return;
1680 if((c = sel) == nexttiled(clients))
1681 if(!(c = nexttiled(c->next)))
1682 return;
1683 detach(c);
1684 attach(c);
1685 focus(c);
1686 arrange();
1687}
1688
1689int
1690main(int argc, char *argv[]) {
1691 if(argc == 2 && !strcmp("-v", argv[1]))
1692 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1693 else if(argc != 1)
1694 eprint("usage: dwm [-v]\n");
1695
1696 setlocale(LC_CTYPE, "");
1697 if(!(dpy = XOpenDisplay(0)))
1698 eprint("dwm: cannot open display\n");
1699 screen = DefaultScreen(dpy);
1700 root = RootWindow(dpy, screen);
1701
1702 checkotherwm();
1703 setup();
1704 drawbar();
1705 scan();
1706 run();
1707 cleanup();
1708
1709 XCloseDisplay(dpy);
1710 return 0;
1711}