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 "dwm.h"
29
30#include <errno.h>
31#include <locale.h>
32#include <stdarg.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <string.h>
36#include <unistd.h>
37#include <sys/select.h>
38#include <sys/types.h>
39#include <sys/wait.h>
40#include <regex.h>
41#include <X11/cursorfont.h>
42#include <X11/keysym.h>
43#include <X11/Xatom.h>
44#include <X11/Xproto.h>
45#include <X11/Xutil.h>
46
47/* macros */
48#define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
49#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
50#define MOUSEMASK (BUTTONMASK | PointerMotionMask)
51
52/* local typedefs */
53typedef struct {
54 const char *prop;
55 const char *tags;
56 Bool isfloating;
57} Rule;
58
59typedef struct {
60 regex_t *propregex;
61 regex_t *tagregex;
62} Regs;
63
64/* variables */
65char stext[256];
66double mwfact;
67int screen, sx, sy, sw, sh, wax, way, waw, wah;
68int (*xerrorxlib)(Display *, XErrorEvent *);
69unsigned int bh, bpos;
70unsigned int blw = 0;
71unsigned int ltidx = 0; /* default */
72unsigned int nlayouts = 0;
73unsigned int nrules = 0;
74unsigned int numlockmask = 0;
75void (*handler[LASTEvent]) (XEvent *) = {
76 [ButtonPress] = buttonpress,
77 [ConfigureRequest] = configurerequest,
78 [ConfigureNotify] = configurenotify,
79 [DestroyNotify] = destroynotify,
80 [EnterNotify] = enternotify,
81 [LeaveNotify] = leavenotify,
82 [Expose] = expose,
83 [KeyPress] = keypress,
84 [MappingNotify] = mappingnotify,
85 [MapRequest] = maprequest,
86 [PropertyNotify] = propertynotify,
87 [UnmapNotify] = unmapnotify
88};
89Atom wmatom[WMLast], netatom[NetLast];
90Bool otherwm, readin;
91Bool running = True;
92Bool selscreen = True;
93Client *clients = NULL;
94Client *sel = NULL;
95Client *stack = NULL;
96Cursor cursor[CurLast];
97Display *dpy;
98DC dc = {0};
99Window barwin, root;
100Regs *regs = NULL;
101
102/* configuration, allows nested code to access above variables */
103#include "config.h"
104
105/* Statically define the number of tags. */
106unsigned int ntags = sizeof tags / sizeof tags[0];
107Bool seltags[sizeof tags / sizeof tags[0]] = {[0] = True};
108Bool prevtags[sizeof tags / sizeof tags[0]] = {[0] = True};
109
110/* functions*/
111void
112applyrules(Client *c) {
113 static char buf[512];
114 unsigned int i, j;
115 regmatch_t tmp;
116 Bool matched = False;
117 XClassHint ch = { 0 };
118
119 /* rule matching */
120 XGetClassHint(dpy, c->win, &ch);
121 snprintf(buf, sizeof buf, "%s:%s:%s",
122 ch.res_class ? ch.res_class : "",
123 ch.res_name ? ch.res_name : "", c->name);
124 for(i = 0; i < nrules; i++)
125 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
126 c->isfloating = rules[i].isfloating;
127 for(j = 0; regs[i].tagregex && j < ntags; j++) {
128 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
129 matched = True;
130 c->tags[j] = True;
131 }
132 }
133 }
134 if(ch.res_class)
135 XFree(ch.res_class);
136 if(ch.res_name)
137 XFree(ch.res_name);
138 if(!matched)
139 memcpy(c->tags, seltags, sizeof seltags);
140}
141
142void
143arrange(void) {
144 Client *c;
145
146 for(c = clients; c; c = c->next)
147 if(isvisible(c))
148 unban(c);
149 else
150 ban(c);
151 layouts[ltidx].arrange();
152 focus(NULL);
153 restack();
154}
155
156void
157attach(Client *c) {
158 if(clients)
159 clients->prev = c;
160 c->next = clients;
161 clients = c;
162}
163
164void
165attachstack(Client *c) {
166 c->snext = stack;
167 stack = c;
168}
169
170void
171ban(Client *c) {
172 if(c->isbanned)
173 return;
174 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
175 c->isbanned = True;
176}
177
178void
179buttonpress(XEvent *e) {
180 unsigned int i, x;
181 Client *c;
182 XButtonPressedEvent *ev = &e->xbutton;
183
184 if(barwin == ev->window) {
185 x = 0;
186 for(i = 0; i < ntags; i++) {
187 x += textw(tags[i]);
188 if(ev->x < x) {
189 if(ev->button == Button1) {
190 if(ev->state & MODKEY)
191 tag(tags[i]);
192 else
193 view(tags[i]);
194 }
195 else if(ev->button == Button3) {
196 if(ev->state & MODKEY)
197 toggletag(tags[i]);
198 else
199 toggleview(tags[i]);
200 }
201 return;
202 }
203 }
204 if((ev->x < x + blw) && ev->button == Button1)
205 setlayout(NULL);
206 }
207 else if((c = getclient(ev->window))) {
208 focus(c);
209 if(CLEANMASK(ev->state) != MODKEY)
210 return;
211 if(ev->button == Button1) {
212 if(isarrange(floating) || c->isfloating)
213 restack();
214 else
215 togglefloating(NULL);
216 movemouse(c);
217 }
218 else if(ev->button == Button2) {
219 if(ISTILE && !c->isfixed && c->isfloating)
220 togglefloating(NULL);
221 else
222 zoom(NULL);
223 }
224 else if(ev->button == Button3 && !c->isfixed) {
225 if(isarrange(floating) || c->isfloating)
226 restack();
227 else
228 togglefloating(NULL);
229 resizemouse(c);
230 }
231 }
232}
233
234void
235checkotherwm(void) {
236 otherwm = False;
237 XSetErrorHandler(xerrorstart);
238
239 /* this causes an error if some other window manager is running */
240 XSelectInput(dpy, root, SubstructureRedirectMask);
241 XSync(dpy, False);
242 if(otherwm)
243 eprint("dwm: another window manager is already running\n");
244 XSync(dpy, False);
245 XSetErrorHandler(NULL);
246 xerrorxlib = XSetErrorHandler(xerror);
247 XSync(dpy, False);
248}
249
250void
251cleanup(void) {
252 close(STDIN_FILENO);
253 while(stack) {
254 unban(stack);
255 unmanage(stack);
256 }
257 if(dc.font.set)
258 XFreeFontSet(dpy, dc.font.set);
259 else
260 XFreeFont(dpy, dc.font.xfont);
261 XUngrabKey(dpy, AnyKey, AnyModifier, root);
262 XFreePixmap(dpy, dc.drawable);
263 XFreeGC(dpy, dc.gc);
264 XDestroyWindow(dpy, barwin);
265 XFreeCursor(dpy, cursor[CurNormal]);
266 XFreeCursor(dpy, cursor[CurResize]);
267 XFreeCursor(dpy, cursor[CurMove]);
268 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
269 XSync(dpy, False);
270}
271
272void
273compileregs(void) {
274 unsigned int i;
275 regex_t *reg;
276
277 if(regs)
278 return;
279 nrules = sizeof rules / sizeof rules[0];
280 regs = emallocz(nrules * sizeof(Regs));
281 for(i = 0; i < nrules; i++) {
282 if(rules[i].prop) {
283 reg = emallocz(sizeof(regex_t));
284 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
285 free(reg);
286 else
287 regs[i].propregex = reg;
288 }
289 if(rules[i].tags) {
290 reg = emallocz(sizeof(regex_t));
291 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
292 free(reg);
293 else
294 regs[i].tagregex = reg;
295 }
296 }
297}
298
299void
300configure(Client *c) {
301 XConfigureEvent ce;
302
303 ce.type = ConfigureNotify;
304 ce.display = dpy;
305 ce.event = c->win;
306 ce.window = c->win;
307 ce.x = c->x;
308 ce.y = c->y;
309 ce.width = c->w;
310 ce.height = c->h;
311 ce.border_width = c->border;
312 ce.above = None;
313 ce.override_redirect = False;
314 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
315}
316
317void
318configurenotify(XEvent *e) {
319 XConfigureEvent *ev = &e->xconfigure;
320
321 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
322 sw = ev->width;
323 sh = ev->height;
324 XFreePixmap(dpy, dc.drawable);
325 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
326 XResizeWindow(dpy, barwin, sw, bh);
327 updatebarpos();
328 arrange();
329 }
330}
331
332void
333configurerequest(XEvent *e) {
334 Client *c;
335 XConfigureRequestEvent *ev = &e->xconfigurerequest;
336 XWindowChanges wc;
337
338 if((c = getclient(ev->window))) {
339 c->ismax = False;
340 if(ev->value_mask & CWBorderWidth)
341 c->border = ev->border_width;
342 if(c->isfixed || c->isfloating || isarrange(floating)) {
343 if(ev->value_mask & CWX)
344 c->x = ev->x;
345 if(ev->value_mask & CWY)
346 c->y = ev->y;
347 if(ev->value_mask & CWWidth)
348 c->w = ev->width;
349 if(ev->value_mask & CWHeight)
350 c->h = ev->height;
351 if((c->x + c->w) > sw && c->isfloating)
352 c->x = sw / 2 - c->w / 2; /* center in x direction */
353 if((c->y + c->h) > sh && c->isfloating)
354 c->y = sh / 2 - c->h / 2; /* center in y direction */
355 if((ev->value_mask & (CWX | CWY))
356 && !(ev->value_mask & (CWWidth | CWHeight)))
357 configure(c);
358 if(isvisible(c))
359 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
360 }
361 else
362 configure(c);
363 }
364 else {
365 wc.x = ev->x;
366 wc.y = ev->y;
367 wc.width = ev->width;
368 wc.height = ev->height;
369 wc.border_width = ev->border_width;
370 wc.sibling = ev->above;
371 wc.stack_mode = ev->detail;
372 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
373 }
374 XSync(dpy, False);
375}
376
377void
378destroynotify(XEvent *e) {
379 Client *c;
380 XDestroyWindowEvent *ev = &e->xdestroywindow;
381
382 if((c = getclient(ev->window)))
383 unmanage(c);
384}
385
386void
387detach(Client *c) {
388 if(c->prev)
389 c->prev->next = c->next;
390 if(c->next)
391 c->next->prev = c->prev;
392 if(c == clients)
393 clients = c->next;
394 c->next = c->prev = NULL;
395}
396
397void
398detachstack(Client *c) {
399 Client **tc;
400
401 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
402 *tc = c->snext;
403}
404
405void
406drawbar(void) {
407 int i, x;
408
409 dc.x = dc.y = 0;
410 for(i = 0; i < ntags; i++) {
411 dc.w = textw(tags[i]);
412 if(seltags[i]) {
413 drawtext(tags[i], dc.sel);
414 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
415 }
416 else {
417 drawtext(tags[i], dc.norm);
418 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
419 }
420 dc.x += dc.w;
421 }
422 dc.w = blw;
423 drawtext(layouts[ltidx].symbol, dc.norm);
424 x = dc.x + dc.w;
425 dc.w = textw(stext);
426 dc.x = sw - dc.w;
427 if(dc.x < x) {
428 dc.x = x;
429 dc.w = sw - x;
430 }
431 drawtext(stext, dc.norm);
432 if((dc.w = dc.x - x) > bh) {
433 dc.x = x;
434 if(sel) {
435 drawtext(sel->name, dc.sel);
436 drawsquare(sel->ismax, sel->isfloating, dc.sel);
437 }
438 else
439 drawtext(NULL, dc.norm);
440 }
441 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
442 XSync(dpy, False);
443}
444
445void
446drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
447 int x;
448 XGCValues gcv;
449 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
450
451 gcv.foreground = col[ColFG];
452 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
453 x = (dc.font.ascent + dc.font.descent + 2) / 4;
454 r.x = dc.x + 1;
455 r.y = dc.y + 1;
456 if(filled) {
457 r.width = r.height = x + 1;
458 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
459 }
460 else if(empty) {
461 r.width = r.height = x;
462 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
463 }
464}
465
466void
467drawtext(const char *text, unsigned long col[ColLast]) {
468 int x, y, w, h;
469 static char buf[256];
470 unsigned int len, olen;
471 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
472
473 XSetForeground(dpy, dc.gc, col[ColBG]);
474 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
475 if(!text)
476 return;
477 w = 0;
478 olen = len = strlen(text);
479 if(len >= sizeof buf)
480 len = sizeof buf - 1;
481 memcpy(buf, text, len);
482 buf[len] = 0;
483 h = dc.font.ascent + dc.font.descent;
484 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
485 x = dc.x + (h / 2);
486 /* shorten text if necessary */
487 while(len && (w = textnw(buf, len)) > dc.w - h)
488 buf[--len] = 0;
489 if(len < olen) {
490 if(len > 1)
491 buf[len - 1] = '.';
492 if(len > 2)
493 buf[len - 2] = '.';
494 if(len > 3)
495 buf[len - 3] = '.';
496 }
497 if(w > dc.w)
498 return; /* too long */
499 XSetForeground(dpy, dc.gc, col[ColFG]);
500 if(dc.font.set)
501 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
502 else
503 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
504}
505
506void *
507emallocz(unsigned int size) {
508 void *res = calloc(1, size);
509
510 if(!res)
511 eprint("fatal: could not malloc() %u bytes\n", size);
512 return res;
513}
514
515void
516enternotify(XEvent *e) {
517 Client *c;
518 XCrossingEvent *ev = &e->xcrossing;
519
520 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
521 return;
522 if((c = getclient(ev->window)))
523 focus(c);
524 else if(ev->window == root) {
525 selscreen = True;
526 focus(NULL);
527 }
528}
529
530void
531eprint(const char *errstr, ...) {
532 va_list ap;
533
534 va_start(ap, errstr);
535 vfprintf(stderr, errstr, ap);
536 va_end(ap);
537 exit(EXIT_FAILURE);
538}
539
540void
541expose(XEvent *e) {
542 XExposeEvent *ev = &e->xexpose;
543
544 if(ev->count == 0) {
545 if(barwin == ev->window)
546 drawbar();
547 }
548}
549
550void
551floating(void) { /* default floating layout */
552 Client *c;
553
554 for(c = clients; c; c = c->next)
555 if(isvisible(c))
556 resize(c, c->x, c->y, c->w, c->h, True);
557}
558
559void
560focus(Client *c) {
561 if((!c && selscreen) || (c && !isvisible(c)))
562 for(c = stack; c && !isvisible(c); c = c->snext);
563 if(sel && sel != c) {
564 grabbuttons(sel, False);
565 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
566 }
567 if(c) {
568 detachstack(c);
569 attachstack(c);
570 grabbuttons(c, True);
571 }
572 sel = c;
573 drawbar();
574 if(!selscreen)
575 return;
576 if(c) {
577 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
578 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
579 }
580 else
581 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
582}
583
584void
585focusnext(const char *arg) {
586 Client *c;
587
588 if(!sel)
589 return;
590 for(c = sel->next; c && !isvisible(c); c = c->next);
591 if(!c)
592 for(c = clients; c && !isvisible(c); c = c->next);
593 if(c) {
594 focus(c);
595 restack();
596 }
597}
598
599void
600focusprev(const char *arg) {
601 Client *c;
602
603 if(!sel)
604 return;
605 for(c = sel->prev; c && !isvisible(c); c = c->prev);
606 if(!c) {
607 for(c = clients; c && c->next; c = c->next);
608 for(; c && !isvisible(c); c = c->prev);
609 }
610 if(c) {
611 focus(c);
612 restack();
613 }
614}
615
616Client *
617getclient(Window w) {
618 Client *c;
619
620 for(c = clients; c && c->win != w; c = c->next);
621 return c;
622}
623
624unsigned long
625getcolor(const char *colstr) {
626 Colormap cmap = DefaultColormap(dpy, screen);
627 XColor color;
628
629 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
630 eprint("error, cannot allocate color '%s'\n", colstr);
631 return color.pixel;
632}
633
634long
635getstate(Window w) {
636 int format, status;
637 long result = -1;
638 unsigned char *p = NULL;
639 unsigned long n, extra;
640 Atom real;
641
642 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
643 &real, &format, &n, &extra, (unsigned char **)&p);
644 if(status != Success)
645 return -1;
646 if(n != 0)
647 result = *p;
648 XFree(p);
649 return result;
650}
651
652Bool
653gettextprop(Window w, Atom atom, char *text, unsigned int size) {
654 char **list = NULL;
655 int n;
656 XTextProperty name;
657
658 if(!text || size == 0)
659 return False;
660 text[0] = '\0';
661 XGetTextProperty(dpy, w, &name, atom);
662 if(!name.nitems)
663 return False;
664 if(name.encoding == XA_STRING)
665 strncpy(text, (char *)name.value, size - 1);
666 else {
667 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
668 && n > 0 && *list)
669 {
670 strncpy(text, *list, size - 1);
671 XFreeStringList(list);
672 }
673 }
674 text[size - 1] = '\0';
675 XFree(name.value);
676 return True;
677}
678
679void
680grabbuttons(Client *c, Bool focused) {
681 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
682
683 if(focused) {
684 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
685 GrabModeAsync, GrabModeSync, None, None);
686 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
687 GrabModeAsync, GrabModeSync, None, None);
688 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
689 GrabModeAsync, GrabModeSync, None, None);
690 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
691 GrabModeAsync, GrabModeSync, None, None);
692
693 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
694 GrabModeAsync, GrabModeSync, None, None);
695 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
696 GrabModeAsync, GrabModeSync, None, None);
697 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
698 GrabModeAsync, GrabModeSync, None, None);
699 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
700 GrabModeAsync, GrabModeSync, None, None);
701
702 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
703 GrabModeAsync, GrabModeSync, None, None);
704 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
705 GrabModeAsync, GrabModeSync, None, None);
706 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
707 GrabModeAsync, GrabModeSync, None, None);
708 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
709 GrabModeAsync, GrabModeSync, None, None);
710 }
711 else
712 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
713 GrabModeAsync, GrabModeSync, None, None);
714}
715
716unsigned int
717idxoftag(const char *tag) {
718 unsigned int i;
719
720 for(i = 0; i < ntags; i++)
721 if(tags[i] == tag)
722 return i;
723 return 0;
724}
725
726void
727initfont(const char *fontstr) {
728 char *def, **missing;
729 int i, n;
730
731 missing = NULL;
732 if(dc.font.set)
733 XFreeFontSet(dpy, dc.font.set);
734 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
735 if(missing) {
736 while(n--)
737 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
738 XFreeStringList(missing);
739 }
740 if(dc.font.set) {
741 XFontSetExtents *font_extents;
742 XFontStruct **xfonts;
743 char **font_names;
744 dc.font.ascent = dc.font.descent = 0;
745 font_extents = XExtentsOfFontSet(dc.font.set);
746 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
747 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
748 if(dc.font.ascent < (*xfonts)->ascent)
749 dc.font.ascent = (*xfonts)->ascent;
750 if(dc.font.descent < (*xfonts)->descent)
751 dc.font.descent = (*xfonts)->descent;
752 xfonts++;
753 }
754 }
755 else {
756 if(dc.font.xfont)
757 XFreeFont(dpy, dc.font.xfont);
758 dc.font.xfont = NULL;
759 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
760 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
761 eprint("error, cannot load font: '%s'\n", fontstr);
762 dc.font.ascent = dc.font.xfont->ascent;
763 dc.font.descent = dc.font.xfont->descent;
764 }
765 dc.font.height = dc.font.ascent + dc.font.descent;
766}
767
768Bool
769isarrange(void (*func)())
770{
771 return func == layouts[ltidx].arrange;
772}
773
774Bool
775isoccupied(unsigned int t) {
776 Client *c;
777
778 for(c = clients; c; c = c->next)
779 if(c->tags[t])
780 return True;
781 return False;
782}
783
784Bool
785isprotodel(Client *c) {
786 int i, n;
787 Atom *protocols;
788 Bool ret = False;
789
790 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
791 for(i = 0; !ret && i < n; i++)
792 if(protocols[i] == wmatom[WMDelete])
793 ret = True;
794 XFree(protocols);
795 }
796 return ret;
797}
798
799Bool
800isvisible(Client *c) {
801 unsigned int i;
802
803 for(i = 0; i < ntags; i++)
804 if(c->tags[i] && seltags[i])
805 return True;
806 return False;
807}
808
809void
810keypress(XEvent *e) {
811 KEYS
812 unsigned int len = sizeof keys / sizeof keys[0];
813 unsigned int i;
814 KeyCode code;
815 KeySym keysym;
816 XKeyEvent *ev;
817
818 if(!e) { /* grabkeys */
819 XUngrabKey(dpy, AnyKey, AnyModifier, root);
820 for(i = 0; i < len; i++) {
821 code = XKeysymToKeycode(dpy, keys[i].keysym);
822 XGrabKey(dpy, code, keys[i].mod, root, True,
823 GrabModeAsync, GrabModeAsync);
824 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
825 GrabModeAsync, GrabModeAsync);
826 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
827 GrabModeAsync, GrabModeAsync);
828 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
829 GrabModeAsync, GrabModeAsync);
830 }
831 return;
832 }
833 ev = &e->xkey;
834 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
835 for(i = 0; i < len; i++)
836 if(keysym == keys[i].keysym
837 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
838 {
839 if(keys[i].func)
840 keys[i].func(keys[i].arg);
841 }
842}
843
844void
845killclient(const char *arg) {
846 XEvent ev;
847
848 if(!sel)
849 return;
850 if(isprotodel(sel)) {
851 ev.type = ClientMessage;
852 ev.xclient.window = sel->win;
853 ev.xclient.message_type = wmatom[WMProtocols];
854 ev.xclient.format = 32;
855 ev.xclient.data.l[0] = wmatom[WMDelete];
856 ev.xclient.data.l[1] = CurrentTime;
857 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
858 }
859 else
860 XKillClient(dpy, sel->win);
861}
862
863void
864leavenotify(XEvent *e) {
865 XCrossingEvent *ev = &e->xcrossing;
866
867 if((ev->window == root) && !ev->same_screen) {
868 selscreen = False;
869 focus(NULL);
870 }
871}
872
873void
874manage(Window w, XWindowAttributes *wa) {
875 Client *c, *t = NULL;
876 Window trans;
877 Status rettrans;
878 XWindowChanges wc;
879
880 c = emallocz(sizeof(Client));
881 c->tags = emallocz(sizeof seltags);
882 c->win = w;
883 c->x = wa->x;
884 c->y = wa->y;
885 c->w = wa->width;
886 c->h = wa->height;
887 c->oldborder = wa->border_width;
888 if(c->w == sw && c->h == sh) {
889 c->x = sx;
890 c->y = sy;
891 c->border = wa->border_width;
892 }
893 else {
894 if(c->x + c->w + 2 * c->border > wax + waw)
895 c->x = wax + waw - c->w - 2 * c->border;
896 if(c->y + c->h + 2 * c->border > way + wah)
897 c->y = way + wah - c->h - 2 * c->border;
898 if(c->x < wax)
899 c->x = wax;
900 if(c->y < way)
901 c->y = way;
902 c->border = BORDERPX;
903 }
904 wc.border_width = c->border;
905 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
906 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
907 configure(c); /* propagates border_width, if size doesn't change */
908 updatesizehints(c);
909 XSelectInput(dpy, w,
910 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
911 grabbuttons(c, False);
912 updatetitle(c);
913 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
914 for(t = clients; t && t->win != trans; t = t->next);
915 if(t)
916 memcpy(c->tags, t->tags, sizeof seltags);
917 applyrules(c);
918 if(!c->isfloating)
919 c->isfloating = (rettrans == Success) || c->isfixed;
920 attach(c);
921 attachstack(c);
922 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
923 ban(c);
924 XMapWindow(dpy, c->win);
925 setclientstate(c, NormalState);
926 arrange();
927}
928
929void
930mappingnotify(XEvent *e) {
931 XMappingEvent *ev = &e->xmapping;
932
933 XRefreshKeyboardMapping(ev);
934 if(ev->request == MappingKeyboard)
935 keypress(NULL);
936}
937
938void
939maprequest(XEvent *e) {
940 static XWindowAttributes wa;
941 XMapRequestEvent *ev = &e->xmaprequest;
942
943 if(!XGetWindowAttributes(dpy, ev->window, &wa))
944 return;
945 if(wa.override_redirect)
946 return;
947 if(!getclient(ev->window))
948 manage(ev->window, &wa);
949}
950
951void
952movemouse(Client *c) {
953 int x1, y1, ocx, ocy, di, nx, ny;
954 unsigned int dui;
955 Window dummy;
956 XEvent ev;
957
958 ocx = nx = c->x;
959 ocy = ny = c->y;
960 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
961 None, cursor[CurMove], CurrentTime) != GrabSuccess)
962 return;
963 c->ismax = False;
964 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
965 for(;;) {
966 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
967 switch (ev.type) {
968 case ButtonRelease:
969 XUngrabPointer(dpy, CurrentTime);
970 return;
971 case ConfigureRequest:
972 case Expose:
973 case MapRequest:
974 handler[ev.type](&ev);
975 break;
976 case MotionNotify:
977 XSync(dpy, False);
978 nx = ocx + (ev.xmotion.x - x1);
979 ny = ocy + (ev.xmotion.y - y1);
980 if(abs(wax + nx) < SNAP)
981 nx = wax;
982 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
983 nx = wax + waw - c->w - 2 * c->border;
984 if(abs(way - ny) < SNAP)
985 ny = way;
986 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
987 ny = way + wah - c->h - 2 * c->border;
988 resize(c, nx, ny, c->w, c->h, False);
989 break;
990 }
991 }
992}
993
994Client *
995nexttiled(Client *c) {
996 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
997 return c;
998}
999
1000void
1001propertynotify(XEvent *e) {
1002 Client *c;
1003 Window trans;
1004 XPropertyEvent *ev = &e->xproperty;
1005
1006 if(ev->state == PropertyDelete)
1007 return; /* ignore */
1008 if((c = getclient(ev->window))) {
1009 switch (ev->atom) {
1010 default: break;
1011 case XA_WM_TRANSIENT_FOR:
1012 XGetTransientForHint(dpy, c->win, &trans);
1013 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1014 arrange();
1015 break;
1016 case XA_WM_NORMAL_HINTS:
1017 updatesizehints(c);
1018 break;
1019 }
1020 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1021 updatetitle(c);
1022 if(c == sel)
1023 drawbar();
1024 }
1025 }
1026}
1027
1028void
1029quit(const char *arg) {
1030 readin = running = False;
1031}
1032
1033void
1034resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1035 double dx, dy, max, min, ratio;
1036 XWindowChanges wc;
1037
1038 if(sizehints) {
1039 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
1040 dx = (double)(w - c->basew);
1041 dy = (double)(h - c->baseh);
1042 min = (double)(c->minax) / (double)(c->minay);
1043 max = (double)(c->maxax) / (double)(c->maxay);
1044 ratio = dx / dy;
1045 if(max > 0 && min > 0 && ratio > 0) {
1046 if(ratio < min) {
1047 dy = (dx * min + dy) / (min * min + 1);
1048 dx = dy * min;
1049 w = (int)dx + c->basew;
1050 h = (int)dy + c->baseh;
1051 }
1052 else if(ratio > max) {
1053 dy = (dx * min + dy) / (max * max + 1);
1054 dx = dy * min;
1055 w = (int)dx + c->basew;
1056 h = (int)dy + c->baseh;
1057 }
1058 }
1059 }
1060 if(c->minw && w < c->minw)
1061 w = c->minw;
1062 if(c->minh && h < c->minh)
1063 h = c->minh;
1064 if(c->maxw && w > c->maxw)
1065 w = c->maxw;
1066 if(c->maxh && h > c->maxh)
1067 h = c->maxh;
1068 if(c->incw)
1069 w -= (w - c->basew) % c->incw;
1070 if(c->inch)
1071 h -= (h - c->baseh) % c->inch;
1072 }
1073 if(w <= 0 || h <= 0)
1074 return;
1075 /* offscreen appearance fixes */
1076 if(x > sw)
1077 x = sw - w - 2 * c->border;
1078 if(y > sh)
1079 y = sh - h - 2 * c->border;
1080 if(x + w + 2 * c->border < sx)
1081 x = sx;
1082 if(y + h + 2 * c->border < sy)
1083 y = sy;
1084 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1085 c->x = wc.x = x;
1086 c->y = wc.y = y;
1087 c->w = wc.width = w;
1088 c->h = wc.height = h;
1089 wc.border_width = c->border;
1090 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1091 configure(c);
1092 XSync(dpy, False);
1093 }
1094}
1095
1096void
1097resizemouse(Client *c) {
1098 int ocx, ocy;
1099 int nw, nh;
1100 XEvent ev;
1101
1102 ocx = c->x;
1103 ocy = c->y;
1104 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1105 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1106 return;
1107 c->ismax = False;
1108 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1109 for(;;) {
1110 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1111 switch(ev.type) {
1112 case ButtonRelease:
1113 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1114 c->w + c->border - 1, c->h + c->border - 1);
1115 XUngrabPointer(dpy, CurrentTime);
1116 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1117 return;
1118 case ConfigureRequest:
1119 case Expose:
1120 case MapRequest:
1121 handler[ev.type](&ev);
1122 break;
1123 case MotionNotify:
1124 XSync(dpy, False);
1125 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1126 nw = 1;
1127 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1128 nh = 1;
1129 resize(c, c->x, c->y, nw, nh, True);
1130 break;
1131 }
1132 }
1133}
1134
1135void
1136restack(void) {
1137 Client *c;
1138 XEvent ev;
1139 XWindowChanges wc;
1140
1141 drawbar();
1142 if(!sel)
1143 return;
1144 if(sel->isfloating || isarrange(floating))
1145 XRaiseWindow(dpy, sel->win);
1146 if(!isarrange(floating)) {
1147 wc.stack_mode = Below;
1148 wc.sibling = barwin;
1149 if(!sel->isfloating) {
1150 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1151 wc.sibling = sel->win;
1152 }
1153 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1154 if(c == sel)
1155 continue;
1156 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1157 wc.sibling = c->win;
1158 }
1159 }
1160 XSync(dpy, False);
1161 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1162}
1163
1164void
1165run(void) {
1166 char *p;
1167 int r, xfd;
1168 fd_set rd;
1169 XEvent ev;
1170
1171 /* main event loop, also reads status text from stdin */
1172 XSync(dpy, False);
1173 xfd = ConnectionNumber(dpy);
1174 readin = True;
1175 while(running) {
1176 FD_ZERO(&rd);
1177 if(readin)
1178 FD_SET(STDIN_FILENO, &rd);
1179 FD_SET(xfd, &rd);
1180 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1181 if(errno == EINTR)
1182 continue;
1183 eprint("select failed\n");
1184 }
1185 if(FD_ISSET(STDIN_FILENO, &rd)) {
1186 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1187 case -1:
1188 strncpy(stext, strerror(errno), sizeof stext - 1);
1189 stext[sizeof stext - 1] = '\0';
1190 readin = False;
1191 break;
1192 case 0:
1193 strncpy(stext, "EOF", 4);
1194 readin = False;
1195 break;
1196 default:
1197 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1198 for(; p >= stext && *p != '\n'; --p);
1199 if(p > stext)
1200 strncpy(stext, p + 1, sizeof stext);
1201 }
1202 drawbar();
1203 }
1204 while(XPending(dpy)) {
1205 XNextEvent(dpy, &ev);
1206 if(handler[ev.type])
1207 (handler[ev.type])(&ev); /* call handler */
1208 }
1209 }
1210}
1211
1212void
1213scan(void) {
1214 unsigned int i, num;
1215 Window *wins, d1, d2;
1216 XWindowAttributes wa;
1217
1218 wins = NULL;
1219 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1220 for(i = 0; i < num; i++) {
1221 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1222 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1223 continue;
1224 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1225 manage(wins[i], &wa);
1226 }
1227 for(i = 0; i < num; i++) { /* now the transients */
1228 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1229 continue;
1230 if(XGetTransientForHint(dpy, wins[i], &d1)
1231 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1232 manage(wins[i], &wa);
1233 }
1234 }
1235 if(wins)
1236 XFree(wins);
1237}
1238
1239void
1240setclientstate(Client *c, long state) {
1241 long data[] = {state, None};
1242
1243 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1244 PropModeReplace, (unsigned char *)data, 2);
1245}
1246
1247void
1248setlayout(const char *arg) {
1249 unsigned int i;
1250
1251 if(!arg) {
1252 if(++ltidx == nlayouts)
1253 ltidx = 0;;
1254 }
1255 else {
1256 for(i = 0; i < nlayouts; i++)
1257 if(!strcmp(arg, layouts[i].symbol))
1258 break;
1259 if(i == nlayouts)
1260 return;
1261 ltidx = i;
1262 }
1263 if(sel)
1264 arrange();
1265 else
1266 drawbar();
1267}
1268
1269void
1270setmwfact(const char *arg) {
1271 double delta;
1272
1273 if(!ISTILE)
1274 return;
1275 /* arg handling, manipulate mwfact */
1276 if(arg == NULL)
1277 mwfact = MWFACT;
1278 else if(1 == sscanf(arg, "%lf", &delta)) {
1279 if(arg[0] == '+' || arg[0] == '-')
1280 mwfact += delta;
1281 else
1282 mwfact = delta;
1283 if(mwfact < 0.1)
1284 mwfact = 0.1;
1285 else if(mwfact > 0.9)
1286 mwfact = 0.9;
1287 }
1288 arrange();
1289}
1290
1291void
1292setup(void) {
1293 int d;
1294 unsigned int i, j, mask;
1295 Window w;
1296 XModifierKeymap *modmap;
1297 XSetWindowAttributes wa;
1298
1299 /* init atoms */
1300 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1301 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1302 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1303 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1304 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1305 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1306 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1307 PropModeReplace, (unsigned char *) netatom, NetLast);
1308
1309 /* init cursors */
1310 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1311 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1312 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1313
1314 /* init geometry */
1315 sx = sy = 0;
1316 sw = DisplayWidth(dpy, screen);
1317 sh = DisplayHeight(dpy, screen);
1318
1319 /* init modifier map */
1320 modmap = XGetModifierMapping(dpy);
1321 for(i = 0; i < 8; i++)
1322 for(j = 0; j < modmap->max_keypermod; j++) {
1323 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1324 == XKeysymToKeycode(dpy, XK_Num_Lock))
1325 numlockmask = (1 << i);
1326 }
1327 XFreeModifiermap(modmap);
1328
1329 /* select for events */
1330 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1331 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1332 wa.cursor = cursor[CurNormal];
1333 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1334 XSelectInput(dpy, root, wa.event_mask);
1335
1336 /* grab keys */
1337 keypress(NULL);
1338
1339 /* init tags */
1340 compileregs();
1341
1342 /* init appearance */
1343 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1344 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1345 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1346 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1347 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1348 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1349 initfont(FONT);
1350 dc.h = bh = dc.font.height + 2;
1351
1352 /* init layouts */
1353 mwfact = MWFACT;
1354 nlayouts = sizeof layouts / sizeof layouts[0];
1355 for(blw = i = 0; i < nlayouts; i++) {
1356 j = textw(layouts[i].symbol);
1357 if(j > blw)
1358 blw = j;
1359 }
1360
1361 /* init bar */
1362 bpos = BARPOS;
1363 wa.override_redirect = 1;
1364 wa.background_pixmap = ParentRelative;
1365 wa.event_mask = ButtonPressMask | ExposureMask;
1366 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1367 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1368 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1369 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1370 updatebarpos();
1371 XMapRaised(dpy, barwin);
1372 strcpy(stext, "dwm-"VERSION);
1373 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1374 dc.gc = XCreateGC(dpy, root, 0, 0);
1375 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1376 if(!dc.font.set)
1377 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1378
1379 /* multihead support */
1380 selscreen = XQueryPointer(dpy, root, &w, &w, &d, &d, &d, &d, &mask);
1381}
1382
1383void
1384spawn(const char *arg) {
1385 static char *shell = NULL;
1386
1387 if(!shell && !(shell = getenv("SHELL")))
1388 shell = "/bin/sh";
1389 if(!arg)
1390 return;
1391 /* The double-fork construct avoids zombie processes and keeps the code
1392 * clean from stupid signal handlers. */
1393 if(fork() == 0) {
1394 if(fork() == 0) {
1395 if(dpy)
1396 close(ConnectionNumber(dpy));
1397 setsid();
1398 execl(shell, shell, "-c", arg, (char *)NULL);
1399 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1400 perror(" failed");
1401 }
1402 exit(0);
1403 }
1404 wait(0);
1405}
1406
1407void
1408tag(const char *arg) {
1409 unsigned int i;
1410
1411 if(!sel)
1412 return;
1413 for(i = 0; i < ntags; i++)
1414 sel->tags[i] = arg == NULL;
1415 i = idxoftag(arg);
1416 if(i >= 0 && i < ntags)
1417 sel->tags[i] = True;
1418 arrange();
1419}
1420
1421unsigned int
1422textnw(const char *text, unsigned int len) {
1423 XRectangle r;
1424
1425 if(dc.font.set) {
1426 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1427 return r.width;
1428 }
1429 return XTextWidth(dc.font.xfont, text, len);
1430}
1431
1432unsigned int
1433textw(const char *text) {
1434 return textnw(text, strlen(text)) + dc.font.height;
1435}
1436
1437void
1438tile(void) {
1439 unsigned int i, n, nx, ny, nw, nh, mw, th;
1440 Client *c, *mc;
1441
1442 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1443 n++;
1444
1445 /* window geoms */
1446 mw = (n == 1) ? waw : mwfact * waw;
1447 th = (n > 1) ? wah / (n - 1) : 0;
1448 if(n > 1 && th < bh)
1449 th = wah;
1450
1451 nx = wax;
1452 ny = way;
1453 nw = 0; /* gcc stupidity requires this */
1454 for(i = 0, c = mc = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1455 c->ismax = False;
1456 if(i == 0) { /* master */
1457 nw = mw - 2 * c->border;
1458 nh = wah - 2 * c->border;
1459 }
1460 else { /* tile window */
1461 if(i == 1) {
1462 ny = way;
1463 nx += mc->w + 2 * mc->border;
1464 nw = waw - nx - 2 * c->border;
1465 }
1466 if(i + 1 == n) /* remainder */
1467 nh = (way + wah) - ny - 2 * c->border;
1468 else
1469 nh = th - 2 * c->border;
1470 }
1471 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1472 if(n > 1 && th != wah)
1473 ny = c->y + c->h + 2 * c->border;
1474 }
1475}
1476
1477void
1478togglebar(const char *arg) {
1479 if(bpos == BarOff)
1480 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1481 else
1482 bpos = BarOff;
1483 updatebarpos();
1484 arrange();
1485}
1486
1487void
1488togglefloating(const char *arg) {
1489 if(!sel)
1490 return;
1491 sel->isfloating = !sel->isfloating;
1492 if(sel->isfloating)
1493 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1494 arrange();
1495}
1496
1497void
1498togglemax(const char *arg) {
1499 XEvent ev;
1500
1501 if(!sel || sel->isfixed)
1502 return;
1503 if((sel->ismax = !sel->ismax)) {
1504 if(isarrange(floating) || sel->isfloating)
1505 sel->wasfloating = True;
1506 else {
1507 togglefloating(NULL);
1508 sel->wasfloating = False;
1509 }
1510 sel->rx = sel->x;
1511 sel->ry = sel->y;
1512 sel->rw = sel->w;
1513 sel->rh = sel->h;
1514 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1515 }
1516 else {
1517 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1518 if(!sel->wasfloating)
1519 togglefloating(NULL);
1520 }
1521 drawbar();
1522 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1523}
1524
1525void
1526toggletag(const char *arg) {
1527 unsigned int i, j;
1528
1529 if(!sel)
1530 return;
1531 i = idxoftag(arg);
1532 sel->tags[i] = !sel->tags[i];
1533 for(j = 0; j < ntags && !sel->tags[j]; j++);
1534 if(j == ntags)
1535 sel->tags[i] = True;
1536 arrange();
1537}
1538
1539void
1540toggleview(const char *arg) {
1541 unsigned int i, j;
1542
1543 i = idxoftag(arg);
1544 seltags[i] = !seltags[i];
1545 for(j = 0; j < ntags && !seltags[j]; j++);
1546 if(j == ntags)
1547 seltags[i] = True; /* at least one tag must be viewed */
1548 arrange();
1549}
1550
1551void
1552unban(Client *c) {
1553 if(!c->isbanned)
1554 return;
1555 XMoveWindow(dpy, c->win, c->x, c->y);
1556 c->isbanned = False;
1557}
1558
1559void
1560unmanage(Client *c) {
1561 XWindowChanges wc;
1562
1563 wc.border_width = c->oldborder;
1564 /* The server grab construct avoids race conditions. */
1565 XGrabServer(dpy);
1566 XSetErrorHandler(xerrordummy);
1567 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1568 detach(c);
1569 detachstack(c);
1570 if(sel == c)
1571 focus(NULL);
1572 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1573 setclientstate(c, WithdrawnState);
1574 free(c->tags);
1575 free(c);
1576 XSync(dpy, False);
1577 XSetErrorHandler(xerror);
1578 XUngrabServer(dpy);
1579 arrange();
1580}
1581
1582void
1583unmapnotify(XEvent *e) {
1584 Client *c;
1585 XUnmapEvent *ev = &e->xunmap;
1586
1587 if((c = getclient(ev->window)))
1588 unmanage(c);
1589}
1590
1591void
1592updatebarpos(void) {
1593 XEvent ev;
1594
1595 wax = sx;
1596 way = sy;
1597 wah = sh;
1598 waw = sw;
1599 switch(bpos) {
1600 default:
1601 wah -= bh;
1602 way += bh;
1603 XMoveWindow(dpy, barwin, sx, sy);
1604 break;
1605 case BarBot:
1606 wah -= bh;
1607 XMoveWindow(dpy, barwin, sx, sy + wah);
1608 break;
1609 case BarOff:
1610 XMoveWindow(dpy, barwin, sx, sy - bh);
1611 break;
1612 }
1613 XSync(dpy, False);
1614 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1615}
1616
1617void
1618updatesizehints(Client *c) {
1619 long msize;
1620 XSizeHints size;
1621
1622 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1623 size.flags = PSize;
1624 c->flags = size.flags;
1625 if(c->flags & PBaseSize) {
1626 c->basew = size.base_width;
1627 c->baseh = size.base_height;
1628 }
1629 else if(c->flags & PMinSize) {
1630 c->basew = size.min_width;
1631 c->baseh = size.min_height;
1632 }
1633 else
1634 c->basew = c->baseh = 0;
1635 if(c->flags & PResizeInc) {
1636 c->incw = size.width_inc;
1637 c->inch = size.height_inc;
1638 }
1639 else
1640 c->incw = c->inch = 0;
1641 if(c->flags & PMaxSize) {
1642 c->maxw = size.max_width;
1643 c->maxh = size.max_height;
1644 }
1645 else
1646 c->maxw = c->maxh = 0;
1647 if(c->flags & PMinSize) {
1648 c->minw = size.min_width;
1649 c->minh = size.min_height;
1650 }
1651 else if(c->flags & PBaseSize) {
1652 c->minw = size.base_width;
1653 c->minh = size.base_height;
1654 }
1655 else
1656 c->minw = c->minh = 0;
1657 if(c->flags & PAspect) {
1658 c->minax = size.min_aspect.x;
1659 c->maxax = size.max_aspect.x;
1660 c->minay = size.min_aspect.y;
1661 c->maxay = size.max_aspect.y;
1662 }
1663 else
1664 c->minax = c->maxax = c->minay = c->maxay = 0;
1665 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1666 && c->maxw == c->minw && c->maxh == c->minh);
1667}
1668
1669void
1670updatetitle(Client *c) {
1671 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1672 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1673}
1674
1675/* There's no way to check accesses to destroyed windows, thus those cases are
1676 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1677 * default error handler, which may call exit. */
1678int
1679xerror(Display *dpy, XErrorEvent *ee) {
1680 if(ee->error_code == BadWindow
1681 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1682 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1683 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1684 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1685 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1686 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1687 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1688 return 0;
1689 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1690 ee->request_code, ee->error_code);
1691 return xerrorxlib(dpy, ee); /* may call exit */
1692}
1693
1694int
1695xerrordummy(Display *dsply, XErrorEvent *ee) {
1696 return 0;
1697}
1698
1699/* Startup Error handler to check if another window manager
1700 * is already running. */
1701int
1702xerrorstart(Display *dsply, XErrorEvent *ee) {
1703 otherwm = True;
1704 return -1;
1705}
1706
1707void
1708view(const char *arg) {
1709 unsigned int i;
1710
1711 memcpy(prevtags, seltags, sizeof seltags);
1712 for(i = 0; i < ntags; i++)
1713 seltags[i] = arg == NULL;
1714 i = idxoftag(arg);
1715 if(i >= 0 && i < ntags)
1716 seltags[i] = True;
1717 arrange();
1718}
1719
1720void
1721viewprevtag(const char *arg) {
1722 static Bool tmptags[sizeof tags / sizeof tags[0]];
1723
1724 memcpy(tmptags, seltags, sizeof seltags);
1725 memcpy(seltags, prevtags, sizeof seltags);
1726 memcpy(prevtags, tmptags, sizeof seltags);
1727 arrange();
1728}
1729
1730void
1731zoom(const char *arg) {
1732 Client *c;
1733
1734 if(!sel || !ISTILE || sel->isfloating)
1735 return;
1736 if((c = sel) == nexttiled(clients))
1737 if(!(c = nexttiled(c->next)))
1738 return;
1739 detach(c);
1740 attach(c);
1741 focus(c);
1742 arrange();
1743}
1744
1745int
1746main(int argc, char *argv[]) {
1747 if(argc == 2 && !strcmp("-v", argv[1]))
1748 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1749 else if(argc != 1)
1750 eprint("usage: dwm [-v]\n");
1751
1752 setlocale(LC_CTYPE, "");
1753 if(!(dpy = XOpenDisplay(0)))
1754 eprint("dwm: cannot open display\n");
1755 screen = DefaultScreen(dpy);
1756 root = RootWindow(dpy, screen);
1757
1758 checkotherwm();
1759 setup();
1760 drawbar();
1761 scan();
1762 run();
1763 cleanup();
1764
1765 XCloseDisplay(dpy);
1766 return 0;
1767}