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[dwm.git] / dwm.c
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 /* macros */
47 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
48 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
49 #define MOUSEMASK (BUTTONMASK | PointerMotionMask)
50
51 /* enums */
52 enum { BarTop, BarBot, BarOff }; /* bar position */
53 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
54 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
55 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
56 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
57
58 /* typedefs */
59 typedef struct Client Client;
60 struct Client {
61 char name[256];
62 int x, y, w, h;
63 int rx, ry, rw, rh; /* revert geometry */
64 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
65 int minax, maxax, minay, maxay;
66 long flags;
67 unsigned int border, oldborder;
68 Bool isbanned, isfixed, ismax, isfloating, wasfloating;
69 Bool *tags;
70 Client *next;
71 Client *prev;
72 Client *snext;
73 Window win;
74 };
75
76 typedef struct {
77 int x, y, w, h;
78 unsigned long norm[ColLast];
79 unsigned long sel[ColLast];
80 Drawable drawable;
81 GC gc;
82 struct {
83 int ascent;
84 int descent;
85 int height;
86 XFontSet set;
87 XFontStruct *xfont;
88 } font;
89 } DC; /* draw context */
90
91 typedef struct {
92 unsigned long mod;
93 KeySym keysym;
94 void (*func)(const char *arg);
95 const char *arg;
96 } Key;
97
98 typedef struct {
99 const char *symbol;
100 void (*arrange)(void);
101 } Layout;
102
103 typedef struct {
104 const char *prop;
105 const char *tags;
106 Bool isfloating;
107 } Rule;
108
109 typedef struct {
110 regex_t *propregex;
111 regex_t *tagregex;
112 } Regs;
113
114 /* forward declarations */
115 void applyrules(Client *c);
116 void arrange(void);
117 void attach(Client *c);
118 void attachstack(Client *c);
119 void ban(Client *c);
120 void buttonpress(XEvent *e);
121 void checkotherwm(void);
122 void cleanup(void);
123 void compileregs(void);
124 void configure(Client *c);
125 void configurenotify(XEvent *e);
126 void configurerequest(XEvent *e);
127 void destroynotify(XEvent *e);
128 void detach(Client *c);
129 void detachstack(Client *c);
130 void drawbar(void);
131 void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
132 void drawtext(const char *text, unsigned long col[ColLast]);
133 void *emallocz(unsigned int size);
134 void enternotify(XEvent *e);
135 void eprint(const char *errstr, ...);
136 void expose(XEvent *e);
137 void floating(void); /* default floating layout */
138 void focus(Client *c);
139 void focusnext(const char *arg);
140 void focusprev(const char *arg);
141 Client *getclient(Window w);
142 unsigned long getcolor(const char *colstr);
143 long getstate(Window w);
144 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
145 void grabbuttons(Client *c, Bool focused);
146 unsigned int idxoftag(const char *tag);
147 void initfont(const char *fontstr);
148 Bool isarrange(void (*func)());
149 Bool isoccupied(unsigned int t);
150 Bool isprotodel(Client *c);
151 Bool isvisible(Client *c);
152 void keypress(XEvent *e);
153 void killclient(const char *arg);
154 void leavenotify(XEvent *e);
155 void manage(Window w, XWindowAttributes *wa);
156 void mappingnotify(XEvent *e);
157 void maprequest(XEvent *e);
158 void movemouse(Client *c);
159 Client *nexttiled(Client *c);
160 void propertynotify(XEvent *e);
161 void quit(const char *arg);
162 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
163 void resizemouse(Client *c);
164 void restack(void);
165 void run(void);
166 void scan(void);
167 void setclientstate(Client *c, long state);
168 void setlayout(const char *arg);
169 void setmwfact(const char *arg);
170 void setup(void);
171 void spawn(const char *arg);
172 void tag(const char *arg);
173 unsigned int textnw(const char *text, unsigned int len);
174 unsigned int textw(const char *text);
175 void tile(void);
176 void togglebar(const char *arg);
177 void togglefloating(const char *arg);
178 void togglemax(const char *arg);
179 void toggletag(const char *arg);
180 void toggleview(const char *arg);
181 void unban(Client *c);
182 void unmanage(Client *c);
183 void unmapnotify(XEvent *e);
184 void updatebarpos(void);
185 void updatesizehints(Client *c);
186 void updatetitle(Client *c);
187 void view(const char *arg);
188 int xerror(Display *dpy, XErrorEvent *ee);
189 int xerrordummy(Display *dsply, XErrorEvent *ee);
190 int xerrorstart(Display *dsply, XErrorEvent *ee);
191 void zoom(const char *arg);
192
193 /* variables */
194 char stext[256];
195 double mwfact;
196 int screen, sx, sy, sw, sh, wax, way, waw, wah;
197 int (*xerrorxlib)(Display *, XErrorEvent *);
198 unsigned int bh, bpos, ntags;
199 unsigned int blw = 0;
200 unsigned int ltidx = 0; /* default */
201 unsigned int nlayouts = 0;
202 unsigned int nrules = 0;
203 unsigned int numlockmask = 0;
204 void (*handler[LASTEvent]) (XEvent *) = {
205 [ButtonPress] = buttonpress,
206 [ConfigureRequest] = configurerequest,
207 [ConfigureNotify] = configurenotify,
208 [DestroyNotify] = destroynotify,
209 [EnterNotify] = enternotify,
210 [LeaveNotify] = leavenotify,
211 [Expose] = expose,
212 [KeyPress] = keypress,
213 [MappingNotify] = mappingnotify,
214 [MapRequest] = maprequest,
215 [PropertyNotify] = propertynotify,
216 [UnmapNotify] = unmapnotify
217 };
218 Atom wmatom[WMLast], netatom[NetLast];
219 Bool otherwm, readin;
220 Bool running = True;
221 Bool *seltags;
222 Bool selscreen = True;
223 Client *clients = NULL;
224 Client *sel = NULL;
225 Client *stack = NULL;
226 Cursor cursor[CurLast];
227 Display *dpy;
228 DC dc = {0};
229 Window barwin, root;
230 Regs *regs = NULL;
231
232 /* configuration, allows nested code to access above variables */
233 #include "config.h"
234
235 /* functions*/
236 void
237 applyrules(Client *c) {
238 static char buf[512];
239 unsigned int i, j;
240 regmatch_t tmp;
241 Bool matched = False;
242 XClassHint ch = { 0 };
243
244 /* rule matching */
245 XGetClassHint(dpy, c->win, &ch);
246 snprintf(buf, sizeof buf, "%s:%s:%s",
247 ch.res_class ? ch.res_class : "",
248 ch.res_name ? ch.res_name : "", c->name);
249 for(i = 0; i < nrules; i++)
250 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
251 c->isfloating = rules[i].isfloating;
252 for(j = 0; regs[i].tagregex && j < ntags; j++) {
253 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
254 matched = True;
255 c->tags[j] = True;
256 }
257 }
258 }
259 if(ch.res_class)
260 XFree(ch.res_class);
261 if(ch.res_name)
262 XFree(ch.res_name);
263 if(!matched)
264 for(i = 0; i < ntags; i++)
265 c->tags[i] = seltags[i];
266 }
267
268 void
269 arrange(void) {
270 Client *c;
271
272 for(c = clients; c; c = c->next)
273 if(isvisible(c))
274 unban(c);
275 else
276 ban(c);
277 layouts[ltidx].arrange();
278 focus(NULL);
279 restack();
280 }
281
282 void
283 attach(Client *c) {
284 if(clients)
285 clients->prev = c;
286 c->next = clients;
287 clients = c;
288 }
289
290 void
291 attachstack(Client *c) {
292 c->snext = stack;
293 stack = c;
294 }
295
296 void
297 ban(Client *c) {
298 if(c->isbanned)
299 return;
300 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
301 c->isbanned = True;
302 }
303
304 void
305 buttonpress(XEvent *e) {
306 unsigned int i, x;
307 Client *c;
308 XButtonPressedEvent *ev = &e->xbutton;
309
310 if(barwin == ev->window) {
311 x = 0;
312 for(i = 0; i < ntags; i++) {
313 x += textw(tags[i]);
314 if(ev->x < x) {
315 if(ev->button == Button1) {
316 if(ev->state & MODKEY)
317 tag(tags[i]);
318 else
319 view(tags[i]);
320 }
321 else if(ev->button == Button3) {
322 if(ev->state & MODKEY)
323 toggletag(tags[i]);
324 else
325 toggleview(tags[i]);
326 }
327 return;
328 }
329 }
330 if((ev->x < x + blw) && ev->button == Button1)
331 setlayout(NULL);
332 }
333 else if((c = getclient(ev->window))) {
334 focus(c);
335 if(CLEANMASK(ev->state) != MODKEY)
336 return;
337 if(ev->button == Button1) {
338 if(isarrange(floating) || c->isfloating)
339 restack();
340 else
341 togglefloating(NULL);
342 movemouse(c);
343 }
344 else if(ev->button == Button2) {
345 if(ISTILE && !c->isfixed && c->isfloating)
346 togglefloating(NULL);
347 else
348 zoom(NULL);
349 }
350 else if(ev->button == Button3 && !c->isfixed) {
351 if(isarrange(floating) || c->isfloating)
352 restack();
353 else
354 togglefloating(NULL);
355 resizemouse(c);
356 }
357 }
358 }
359
360 void
361 checkotherwm(void) {
362 otherwm = False;
363 XSetErrorHandler(xerrorstart);
364
365 /* this causes an error if some other window manager is running */
366 XSelectInput(dpy, root, SubstructureRedirectMask);
367 XSync(dpy, False);
368 if(otherwm)
369 eprint("dwm: another window manager is already running\n");
370 XSync(dpy, False);
371 XSetErrorHandler(NULL);
372 xerrorxlib = XSetErrorHandler(xerror);
373 XSync(dpy, False);
374 }
375
376 void
377 cleanup(void) {
378 close(STDIN_FILENO);
379 while(stack) {
380 unban(stack);
381 unmanage(stack);
382 }
383 if(dc.font.set)
384 XFreeFontSet(dpy, dc.font.set);
385 else
386 XFreeFont(dpy, dc.font.xfont);
387 XUngrabKey(dpy, AnyKey, AnyModifier, root);
388 XFreePixmap(dpy, dc.drawable);
389 XFreeGC(dpy, dc.gc);
390 XDestroyWindow(dpy, barwin);
391 XFreeCursor(dpy, cursor[CurNormal]);
392 XFreeCursor(dpy, cursor[CurResize]);
393 XFreeCursor(dpy, cursor[CurMove]);
394 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
395 XSync(dpy, False);
396 free(seltags);
397 }
398
399 void
400 compileregs(void) {
401 unsigned int i;
402 regex_t *reg;
403
404 if(regs)
405 return;
406 nrules = sizeof rules / sizeof rules[0];
407 regs = emallocz(nrules * sizeof(Regs));
408 for(i = 0; i < nrules; i++) {
409 if(rules[i].prop) {
410 reg = emallocz(sizeof(regex_t));
411 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
412 free(reg);
413 else
414 regs[i].propregex = reg;
415 }
416 if(rules[i].tags) {
417 reg = emallocz(sizeof(regex_t));
418 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
419 free(reg);
420 else
421 regs[i].tagregex = reg;
422 }
423 }
424 }
425
426 void
427 configure(Client *c) {
428 XConfigureEvent ce;
429
430 ce.type = ConfigureNotify;
431 ce.display = dpy;
432 ce.event = c->win;
433 ce.window = c->win;
434 ce.x = c->x;
435 ce.y = c->y;
436 ce.width = c->w;
437 ce.height = c->h;
438 ce.border_width = c->border;
439 ce.above = None;
440 ce.override_redirect = False;
441 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
442 }
443
444 void
445 configurenotify(XEvent *e) {
446 XConfigureEvent *ev = &e->xconfigure;
447
448 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
449 sw = ev->width;
450 sh = ev->height;
451 XFreePixmap(dpy, dc.drawable);
452 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
453 XResizeWindow(dpy, barwin, sw, bh);
454 updatebarpos();
455 arrange();
456 }
457 }
458
459 void
460 configurerequest(XEvent *e) {
461 Client *c;
462 XConfigureRequestEvent *ev = &e->xconfigurerequest;
463 XWindowChanges wc;
464
465 if((c = getclient(ev->window))) {
466 c->ismax = False;
467 if(ev->value_mask & CWBorderWidth)
468 c->border = ev->border_width;
469 if(c->isfixed || c->isfloating || isarrange(floating)) {
470 if(ev->value_mask & CWX)
471 c->x = ev->x;
472 if(ev->value_mask & CWY)
473 c->y = ev->y;
474 if(ev->value_mask & CWWidth)
475 c->w = ev->width;
476 if(ev->value_mask & CWHeight)
477 c->h = ev->height;
478 if((c->x + c->w) > sw && c->isfloating)
479 c->x = sw / 2 - c->w / 2; /* center in x direction */
480 if((c->y + c->h) > sh && c->isfloating)
481 c->y = sh / 2 - c->h / 2; /* center in y direction */
482 if((ev->value_mask & (CWX | CWY))
483 && !(ev->value_mask & (CWWidth | CWHeight)))
484 configure(c);
485 if(isvisible(c))
486 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
487 }
488 else
489 configure(c);
490 }
491 else {
492 wc.x = ev->x;
493 wc.y = ev->y;
494 wc.width = ev->width;
495 wc.height = ev->height;
496 wc.border_width = ev->border_width;
497 wc.sibling = ev->above;
498 wc.stack_mode = ev->detail;
499 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
500 }
501 XSync(dpy, False);
502 }
503
504 void
505 destroynotify(XEvent *e) {
506 Client *c;
507 XDestroyWindowEvent *ev = &e->xdestroywindow;
508
509 if((c = getclient(ev->window)))
510 unmanage(c);
511 }
512
513 void
514 detach(Client *c) {
515 if(c->prev)
516 c->prev->next = c->next;
517 if(c->next)
518 c->next->prev = c->prev;
519 if(c == clients)
520 clients = c->next;
521 c->next = c->prev = NULL;
522 }
523
524 void
525 detachstack(Client *c) {
526 Client **tc;
527
528 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
529 *tc = c->snext;
530 }
531
532 void
533 drawbar(void) {
534 int i, x;
535
536 dc.x = dc.y = 0;
537 for(i = 0; i < ntags; i++) {
538 dc.w = textw(tags[i]);
539 if(seltags[i]) {
540 drawtext(tags[i], dc.sel);
541 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
542 }
543 else {
544 drawtext(tags[i], dc.norm);
545 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
546 }
547 dc.x += dc.w;
548 }
549 dc.w = blw;
550 drawtext(layouts[ltidx].symbol, dc.norm);
551 x = dc.x + dc.w;
552 dc.w = textw(stext);
553 dc.x = sw - dc.w;
554 if(dc.x < x) {
555 dc.x = x;
556 dc.w = sw - x;
557 }
558 drawtext(stext, dc.norm);
559 if((dc.w = dc.x - x) > bh) {
560 dc.x = x;
561 if(sel) {
562 drawtext(sel->name, dc.sel);
563 drawsquare(sel->ismax, sel->isfloating, dc.sel);
564 }
565 else
566 drawtext(NULL, dc.norm);
567 }
568 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
569 XSync(dpy, False);
570 }
571
572 void
573 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
574 int x;
575 XGCValues gcv;
576 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
577
578 gcv.foreground = col[ColFG];
579 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
580 x = (dc.font.ascent + dc.font.descent + 2) / 4;
581 r.x = dc.x + 1;
582 r.y = dc.y + 1;
583 if(filled) {
584 r.width = r.height = x + 1;
585 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
586 }
587 else if(empty) {
588 r.width = r.height = x;
589 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
590 }
591 }
592
593 void
594 drawtext(const char *text, unsigned long col[ColLast]) {
595 int x, y, w, h;
596 static char buf[256];
597 unsigned int len, olen;
598 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
599
600 XSetForeground(dpy, dc.gc, col[ColBG]);
601 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
602 if(!text)
603 return;
604 w = 0;
605 olen = len = strlen(text);
606 if(len >= sizeof buf)
607 len = sizeof buf - 1;
608 memcpy(buf, text, len);
609 buf[len] = 0;
610 h = dc.font.ascent + dc.font.descent;
611 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
612 x = dc.x + (h / 2);
613 /* shorten text if necessary */
614 while(len && (w = textnw(buf, len)) > dc.w - h)
615 buf[--len] = 0;
616 if(len < olen) {
617 if(len > 1)
618 buf[len - 1] = '.';
619 if(len > 2)
620 buf[len - 2] = '.';
621 if(len > 3)
622 buf[len - 3] = '.';
623 }
624 if(w > dc.w)
625 return; /* too long */
626 XSetForeground(dpy, dc.gc, col[ColFG]);
627 if(dc.font.set)
628 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
629 else
630 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
631 }
632
633 void *
634 emallocz(unsigned int size) {
635 void *res = calloc(1, size);
636
637 if(!res)
638 eprint("fatal: could not malloc() %u bytes\n", size);
639 return res;
640 }
641
642 void
643 enternotify(XEvent *e) {
644 Client *c;
645 XCrossingEvent *ev = &e->xcrossing;
646
647 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
648 return;
649 if((c = getclient(ev->window)))
650 focus(c);
651 else if(ev->window == root) {
652 selscreen = True;
653 focus(NULL);
654 }
655 }
656
657 void
658 eprint(const char *errstr, ...) {
659 va_list ap;
660
661 va_start(ap, errstr);
662 vfprintf(stderr, errstr, ap);
663 va_end(ap);
664 exit(EXIT_FAILURE);
665 }
666
667 void
668 expose(XEvent *e) {
669 XExposeEvent *ev = &e->xexpose;
670
671 if(ev->count == 0) {
672 if(barwin == ev->window)
673 drawbar();
674 }
675 }
676
677 void
678 floating(void) { /* default floating layout */
679 Client *c;
680
681 for(c = clients; c; c = c->next)
682 if(isvisible(c))
683 resize(c, c->x, c->y, c->w, c->h, True);
684 }
685
686 void
687 focus(Client *c) {
688 if((!c && selscreen) || (c && !isvisible(c)))
689 for(c = stack; c && !isvisible(c); c = c->snext);
690 if(sel && sel != c) {
691 grabbuttons(sel, False);
692 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
693 }
694 if(c) {
695 detachstack(c);
696 attachstack(c);
697 grabbuttons(c, True);
698 }
699 sel = c;
700 drawbar();
701 if(!selscreen)
702 return;
703 if(c) {
704 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
705 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
706 }
707 else
708 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
709 }
710
711 void
712 focusnext(const char *arg) {
713 Client *c;
714
715 if(!sel)
716 return;
717 for(c = sel->next; c && !isvisible(c); c = c->next);
718 if(!c)
719 for(c = clients; c && !isvisible(c); c = c->next);
720 if(c) {
721 focus(c);
722 restack();
723 }
724 }
725
726 void
727 focusprev(const char *arg) {
728 Client *c;
729
730 if(!sel)
731 return;
732 for(c = sel->prev; c && !isvisible(c); c = c->prev);
733 if(!c) {
734 for(c = clients; c && c->next; c = c->next);
735 for(; c && !isvisible(c); c = c->prev);
736 }
737 if(c) {
738 focus(c);
739 restack();
740 }
741 }
742
743 Client *
744 getclient(Window w) {
745 Client *c;
746
747 for(c = clients; c && c->win != w; c = c->next);
748 return c;
749 }
750
751 unsigned long
752 getcolor(const char *colstr) {
753 Colormap cmap = DefaultColormap(dpy, screen);
754 XColor color;
755
756 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
757 eprint("error, cannot allocate color '%s'\n", colstr);
758 return color.pixel;
759 }
760
761 long
762 getstate(Window w) {
763 int format, status;
764 long result = -1;
765 unsigned char *p = NULL;
766 unsigned long n, extra;
767 Atom real;
768
769 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
770 &real, &format, &n, &extra, (unsigned char **)&p);
771 if(status != Success)
772 return -1;
773 if(n != 0)
774 result = *p;
775 XFree(p);
776 return result;
777 }
778
779 Bool
780 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
781 char **list = NULL;
782 int n;
783 XTextProperty name;
784
785 if(!text || size == 0)
786 return False;
787 text[0] = '\0';
788 XGetTextProperty(dpy, w, &name, atom);
789 if(!name.nitems)
790 return False;
791 if(name.encoding == XA_STRING)
792 strncpy(text, (char *)name.value, size - 1);
793 else {
794 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
795 && n > 0 && *list)
796 {
797 strncpy(text, *list, size - 1);
798 XFreeStringList(list);
799 }
800 }
801 text[size - 1] = '\0';
802 XFree(name.value);
803 return True;
804 }
805
806 void
807 grabbuttons(Client *c, Bool focused) {
808 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
809
810 if(focused) {
811 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
812 GrabModeAsync, GrabModeSync, None, None);
813 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
814 GrabModeAsync, GrabModeSync, None, None);
815 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
816 GrabModeAsync, GrabModeSync, None, None);
817 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
818 GrabModeAsync, GrabModeSync, None, None);
819
820 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
821 GrabModeAsync, GrabModeSync, None, None);
822 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
823 GrabModeAsync, GrabModeSync, None, None);
824 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
825 GrabModeAsync, GrabModeSync, None, None);
826 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
827 GrabModeAsync, GrabModeSync, None, None);
828
829 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
830 GrabModeAsync, GrabModeSync, None, None);
831 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
832 GrabModeAsync, GrabModeSync, None, None);
833 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
834 GrabModeAsync, GrabModeSync, None, None);
835 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
836 GrabModeAsync, GrabModeSync, None, None);
837 }
838 else
839 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
840 GrabModeAsync, GrabModeSync, None, None);
841 }
842
843 unsigned int
844 idxoftag(const char *tag) {
845 unsigned int i;
846
847 for(i = 0; i < ntags; i++)
848 if(tags[i] == tag)
849 return i;
850 return 0;
851 }
852
853 void
854 initfont(const char *fontstr) {
855 char *def, **missing;
856 int i, n;
857
858 missing = NULL;
859 if(dc.font.set)
860 XFreeFontSet(dpy, dc.font.set);
861 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
862 if(missing) {
863 while(n--)
864 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
865 XFreeStringList(missing);
866 }
867 if(dc.font.set) {
868 XFontSetExtents *font_extents;
869 XFontStruct **xfonts;
870 char **font_names;
871 dc.font.ascent = dc.font.descent = 0;
872 font_extents = XExtentsOfFontSet(dc.font.set);
873 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
874 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
875 if(dc.font.ascent < (*xfonts)->ascent)
876 dc.font.ascent = (*xfonts)->ascent;
877 if(dc.font.descent < (*xfonts)->descent)
878 dc.font.descent = (*xfonts)->descent;
879 xfonts++;
880 }
881 }
882 else {
883 if(dc.font.xfont)
884 XFreeFont(dpy, dc.font.xfont);
885 dc.font.xfont = NULL;
886 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
887 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
888 eprint("error, cannot load font: '%s'\n", fontstr);
889 dc.font.ascent = dc.font.xfont->ascent;
890 dc.font.descent = dc.font.xfont->descent;
891 }
892 dc.font.height = dc.font.ascent + dc.font.descent;
893 }
894
895 Bool
896 isarrange(void (*func)())
897 {
898 return func == layouts[ltidx].arrange;
899 }
900
901 Bool
902 isoccupied(unsigned int t) {
903 Client *c;
904
905 for(c = clients; c; c = c->next)
906 if(c->tags[t])
907 return True;
908 return False;
909 }
910
911 Bool
912 isprotodel(Client *c) {
913 int i, n;
914 Atom *protocols;
915 Bool ret = False;
916
917 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
918 for(i = 0; !ret && i < n; i++)
919 if(protocols[i] == wmatom[WMDelete])
920 ret = True;
921 XFree(protocols);
922 }
923 return ret;
924 }
925
926 Bool
927 isvisible(Client *c) {
928 unsigned int i;
929
930 for(i = 0; i < ntags; i++)
931 if(c->tags[i] && seltags[i])
932 return True;
933 return False;
934 }
935
936 void
937 keypress(XEvent *e) {
938 KEYS
939 unsigned int len = sizeof keys / sizeof keys[0];
940 unsigned int i;
941 KeyCode code;
942 KeySym keysym;
943 XKeyEvent *ev;
944
945 if(!e) { /* grabkeys */
946 XUngrabKey(dpy, AnyKey, AnyModifier, root);
947 for(i = 0; i < len; i++) {
948 code = XKeysymToKeycode(dpy, keys[i].keysym);
949 XGrabKey(dpy, code, keys[i].mod, root, True,
950 GrabModeAsync, GrabModeAsync);
951 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
952 GrabModeAsync, GrabModeAsync);
953 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
954 GrabModeAsync, GrabModeAsync);
955 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
956 GrabModeAsync, GrabModeAsync);
957 }
958 return;
959 }
960 ev = &e->xkey;
961 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
962 for(i = 0; i < len; i++)
963 if(keysym == keys[i].keysym
964 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
965 {
966 if(keys[i].func)
967 keys[i].func(keys[i].arg);
968 }
969 }
970
971 void
972 killclient(const char *arg) {
973 XEvent ev;
974
975 if(!sel)
976 return;
977 if(isprotodel(sel)) {
978 ev.type = ClientMessage;
979 ev.xclient.window = sel->win;
980 ev.xclient.message_type = wmatom[WMProtocols];
981 ev.xclient.format = 32;
982 ev.xclient.data.l[0] = wmatom[WMDelete];
983 ev.xclient.data.l[1] = CurrentTime;
984 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
985 }
986 else
987 XKillClient(dpy, sel->win);
988 }
989
990 void
991 leavenotify(XEvent *e) {
992 XCrossingEvent *ev = &e->xcrossing;
993
994 if((ev->window == root) && !ev->same_screen) {
995 selscreen = False;
996 focus(NULL);
997 }
998 }
999
1000 void
1001 manage(Window w, XWindowAttributes *wa) {
1002 unsigned int i;
1003 Client *c, *t = NULL;
1004 Window trans;
1005 Status rettrans;
1006 XWindowChanges wc;
1007
1008 c = emallocz(sizeof(Client));
1009 c->tags = emallocz(ntags * sizeof(Bool));
1010 c->win = w;
1011 c->x = wa->x;
1012 c->y = wa->y;
1013 c->w = wa->width;
1014 c->h = wa->height;
1015 c->oldborder = wa->border_width;
1016 if(c->w == sw && c->h == sh) {
1017 c->x = sx;
1018 c->y = sy;
1019 c->border = wa->border_width;
1020 }
1021 else {
1022 if(c->x + c->w + 2 * c->border > wax + waw)
1023 c->x = wax + waw - c->w - 2 * c->border;
1024 if(c->y + c->h + 2 * c->border > way + wah)
1025 c->y = way + wah - c->h - 2 * c->border;
1026 if(c->x < wax)
1027 c->x = wax;
1028 if(c->y < way)
1029 c->y = way;
1030 c->border = BORDERPX;
1031 }
1032 wc.border_width = c->border;
1033 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1034 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1035 configure(c); /* propagates border_width, if size doesn't change */
1036 updatesizehints(c);
1037 XSelectInput(dpy, w,
1038 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
1039 grabbuttons(c, False);
1040 updatetitle(c);
1041 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1042 for(t = clients; t && t->win != trans; t = t->next);
1043 if(t)
1044 for(i = 0; i < ntags; i++)
1045 c->tags[i] = t->tags[i];
1046 applyrules(c);
1047 if(!c->isfloating)
1048 c->isfloating = (rettrans == Success) || c->isfixed;
1049 attach(c);
1050 attachstack(c);
1051 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1052 ban(c);
1053 XMapWindow(dpy, c->win);
1054 setclientstate(c, NormalState);
1055 arrange();
1056 }
1057
1058 void
1059 mappingnotify(XEvent *e) {
1060 XMappingEvent *ev = &e->xmapping;
1061
1062 XRefreshKeyboardMapping(ev);
1063 if(ev->request == MappingKeyboard)
1064 keypress(NULL);
1065 }
1066
1067 void
1068 maprequest(XEvent *e) {
1069 static XWindowAttributes wa;
1070 XMapRequestEvent *ev = &e->xmaprequest;
1071
1072 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1073 return;
1074 if(wa.override_redirect)
1075 return;
1076 if(!getclient(ev->window))
1077 manage(ev->window, &wa);
1078 }
1079
1080 void
1081 movemouse(Client *c) {
1082 int x1, y1, ocx, ocy, di, nx, ny;
1083 unsigned int dui;
1084 Window dummy;
1085 XEvent ev;
1086
1087 ocx = nx = c->x;
1088 ocy = ny = c->y;
1089 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1090 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1091 return;
1092 c->ismax = False;
1093 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1094 for(;;) {
1095 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1096 switch (ev.type) {
1097 case ButtonRelease:
1098 XUngrabPointer(dpy, CurrentTime);
1099 return;
1100 case ConfigureRequest:
1101 case Expose:
1102 case MapRequest:
1103 handler[ev.type](&ev);
1104 break;
1105 case MotionNotify:
1106 XSync(dpy, False);
1107 nx = ocx + (ev.xmotion.x - x1);
1108 ny = ocy + (ev.xmotion.y - y1);
1109 if(abs(wax + nx) < SNAP)
1110 nx = wax;
1111 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1112 nx = wax + waw - c->w - 2 * c->border;
1113 if(abs(way - ny) < SNAP)
1114 ny = way;
1115 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1116 ny = way + wah - c->h - 2 * c->border;
1117 resize(c, nx, ny, c->w, c->h, False);
1118 break;
1119 }
1120 }
1121 }
1122
1123 Client *
1124 nexttiled(Client *c) {
1125 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1126 return c;
1127 }
1128
1129 void
1130 propertynotify(XEvent *e) {
1131 Client *c;
1132 Window trans;
1133 XPropertyEvent *ev = &e->xproperty;
1134
1135 if(ev->state == PropertyDelete)
1136 return; /* ignore */
1137 if((c = getclient(ev->window))) {
1138 switch (ev->atom) {
1139 default: break;
1140 case XA_WM_TRANSIENT_FOR:
1141 XGetTransientForHint(dpy, c->win, &trans);
1142 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1143 arrange();
1144 break;
1145 case XA_WM_NORMAL_HINTS:
1146 updatesizehints(c);
1147 break;
1148 }
1149 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1150 updatetitle(c);
1151 if(c == sel)
1152 drawbar();
1153 }
1154 }
1155 }
1156
1157 void
1158 quit(const char *arg) {
1159 readin = running = False;
1160 }
1161
1162 void
1163 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1164 double dx, dy, max, min, ratio;
1165 XWindowChanges wc;
1166
1167 if(sizehints) {
1168 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
1169 dx = (double)(w - c->basew);
1170 dy = (double)(h - c->baseh);
1171 min = (double)(c->minax) / (double)(c->minay);
1172 max = (double)(c->maxax) / (double)(c->maxay);
1173 ratio = dx / dy;
1174 if(max > 0 && min > 0 && ratio > 0) {
1175 if(ratio < min) {
1176 dy = (dx * min + dy) / (min * min + 1);
1177 dx = dy * min;
1178 w = (int)dx + c->basew;
1179 h = (int)dy + c->baseh;
1180 }
1181 else if(ratio > max) {
1182 dy = (dx * min + dy) / (max * max + 1);
1183 dx = dy * min;
1184 w = (int)dx + c->basew;
1185 h = (int)dy + c->baseh;
1186 }
1187 }
1188 }
1189 if(c->minw && w < c->minw)
1190 w = c->minw;
1191 if(c->minh && h < c->minh)
1192 h = c->minh;
1193 if(c->maxw && w > c->maxw)
1194 w = c->maxw;
1195 if(c->maxh && h > c->maxh)
1196 h = c->maxh;
1197 if(c->incw)
1198 w -= (w - c->basew) % c->incw;
1199 if(c->inch)
1200 h -= (h - c->baseh) % c->inch;
1201 }
1202 if(w <= 0 || h <= 0)
1203 return;
1204 /* offscreen appearance fixes */
1205 if(x > sw)
1206 x = sw - w - 2 * c->border;
1207 if(y > sh)
1208 y = sh - h - 2 * c->border;
1209 if(x + w + 2 * c->border < sx)
1210 x = sx;
1211 if(y + h + 2 * c->border < sy)
1212 y = sy;
1213 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1214 c->x = wc.x = x;
1215 c->y = wc.y = y;
1216 c->w = wc.width = w;
1217 c->h = wc.height = h;
1218 wc.border_width = c->border;
1219 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1220 configure(c);
1221 XSync(dpy, False);
1222 }
1223 }
1224
1225 void
1226 resizemouse(Client *c) {
1227 int ocx, ocy;
1228 int nw, nh;
1229 XEvent ev;
1230
1231 ocx = c->x;
1232 ocy = c->y;
1233 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1234 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1235 return;
1236 c->ismax = False;
1237 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1238 for(;;) {
1239 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1240 switch(ev.type) {
1241 case ButtonRelease:
1242 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1243 c->w + c->border - 1, c->h + c->border - 1);
1244 XUngrabPointer(dpy, CurrentTime);
1245 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1246 return;
1247 case ConfigureRequest:
1248 case Expose:
1249 case MapRequest:
1250 handler[ev.type](&ev);
1251 break;
1252 case MotionNotify:
1253 XSync(dpy, False);
1254 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1255 nw = 1;
1256 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1257 nh = 1;
1258 resize(c, c->x, c->y, nw, nh, True);
1259 break;
1260 }
1261 }
1262 }
1263
1264 void
1265 restack(void) {
1266 Client *c;
1267 XEvent ev;
1268 XWindowChanges wc;
1269
1270 drawbar();
1271 if(!sel)
1272 return;
1273 if(sel->isfloating || isarrange(floating))
1274 XRaiseWindow(dpy, sel->win);
1275 if(!isarrange(floating)) {
1276 wc.stack_mode = Below;
1277 wc.sibling = barwin;
1278 if(!sel->isfloating) {
1279 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1280 wc.sibling = sel->win;
1281 }
1282 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1283 if(c == sel)
1284 continue;
1285 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1286 wc.sibling = c->win;
1287 }
1288 }
1289 XSync(dpy, False);
1290 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1291 }
1292
1293 void
1294 run(void) {
1295 char *p;
1296 int r, xfd;
1297 fd_set rd;
1298 XEvent ev;
1299
1300 /* main event loop, also reads status text from stdin */
1301 XSync(dpy, False);
1302 xfd = ConnectionNumber(dpy);
1303 readin = True;
1304 while(running) {
1305 FD_ZERO(&rd);
1306 if(readin)
1307 FD_SET(STDIN_FILENO, &rd);
1308 FD_SET(xfd, &rd);
1309 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1310 if(errno == EINTR)
1311 continue;
1312 eprint("select failed\n");
1313 }
1314 if(FD_ISSET(STDIN_FILENO, &rd)) {
1315 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1316 case -1:
1317 strncpy(stext, strerror(errno), sizeof stext - 1);
1318 stext[sizeof stext - 1] = '\0';
1319 readin = False;
1320 break;
1321 case 0:
1322 strncpy(stext, "EOF", 4);
1323 readin = False;
1324 break;
1325 default:
1326 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1327 for(; p >= stext && *p != '\n'; --p);
1328 if(p > stext)
1329 strncpy(stext, p + 1, sizeof stext);
1330 }
1331 drawbar();
1332 }
1333 while(XPending(dpy)) {
1334 XNextEvent(dpy, &ev);
1335 if(handler[ev.type])
1336 (handler[ev.type])(&ev); /* call handler */
1337 }
1338 }
1339 }
1340
1341 void
1342 scan(void) {
1343 unsigned int i, num;
1344 Window *wins, d1, d2;
1345 XWindowAttributes wa;
1346
1347 wins = NULL;
1348 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1349 for(i = 0; i < num; i++) {
1350 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1351 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1352 continue;
1353 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1354 manage(wins[i], &wa);
1355 }
1356 for(i = 0; i < num; i++) { /* now the transients */
1357 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1358 continue;
1359 if(XGetTransientForHint(dpy, wins[i], &d1)
1360 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1361 manage(wins[i], &wa);
1362 }
1363 }
1364 if(wins)
1365 XFree(wins);
1366 }
1367
1368 void
1369 setclientstate(Client *c, long state) {
1370 long data[] = {state, None};
1371
1372 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1373 PropModeReplace, (unsigned char *)data, 2);
1374 }
1375
1376 void
1377 setlayout(const char *arg) {
1378 unsigned int i;
1379
1380 if(!arg) {
1381 if(++ltidx == nlayouts)
1382 ltidx = 0;;
1383 }
1384 else {
1385 for(i = 0; i < nlayouts; i++)
1386 if(!strcmp(arg, layouts[i].symbol))
1387 break;
1388 if(i == nlayouts)
1389 return;
1390 ltidx = i;
1391 }
1392 if(sel)
1393 arrange();
1394 else
1395 drawbar();
1396 }
1397
1398 void
1399 setmwfact(const char *arg) {
1400 double delta;
1401
1402 if(!ISTILE)
1403 return;
1404 /* arg handling, manipulate mwfact */
1405 if(arg == NULL)
1406 mwfact = MWFACT;
1407 else if(1 == sscanf(arg, "%lf", &delta)) {
1408 if(arg[0] == '+' || arg[0] == '-')
1409 mwfact += delta;
1410 else
1411 mwfact = delta;
1412 if(mwfact < 0.1)
1413 mwfact = 0.1;
1414 else if(mwfact > 0.9)
1415 mwfact = 0.9;
1416 }
1417 arrange();
1418 }
1419
1420 void
1421 setup(void) {
1422 int d;
1423 unsigned int i, j, mask;
1424 Window w;
1425 XModifierKeymap *modmap;
1426 XSetWindowAttributes wa;
1427
1428 /* init atoms */
1429 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1430 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1431 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1432 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1433 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1434 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1435 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1436 PropModeReplace, (unsigned char *) netatom, NetLast);
1437
1438 /* init cursors */
1439 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1440 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1441 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1442
1443 /* init geometry */
1444 sx = sy = 0;
1445 sw = DisplayWidth(dpy, screen);
1446 sh = DisplayHeight(dpy, screen);
1447
1448 /* init modifier map */
1449 modmap = XGetModifierMapping(dpy);
1450 for(i = 0; i < 8; i++)
1451 for(j = 0; j < modmap->max_keypermod; j++) {
1452 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1453 == XKeysymToKeycode(dpy, XK_Num_Lock))
1454 numlockmask = (1 << i);
1455 }
1456 XFreeModifiermap(modmap);
1457
1458 /* select for events */
1459 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1460 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1461 wa.cursor = cursor[CurNormal];
1462 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1463 XSelectInput(dpy, root, wa.event_mask);
1464
1465 /* grab keys */
1466 keypress(NULL);
1467
1468 /* init tags */
1469 compileregs();
1470 for(ntags = 0; tags[ntags]; ntags++);
1471 seltags = emallocz(sizeof(Bool) * ntags);
1472 seltags[0] = True;
1473
1474 /* init appearance */
1475 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1476 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1477 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1478 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1479 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1480 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1481 initfont(FONT);
1482 dc.h = bh = dc.font.height + 2;
1483
1484 /* init layouts */
1485 mwfact = MWFACT;
1486 nlayouts = sizeof layouts / sizeof layouts[0];
1487 for(blw = i = 0; i < nlayouts; i++) {
1488 j = textw(layouts[i].symbol);
1489 if(j > blw)
1490 blw = j;
1491 }
1492
1493 /* init bar */
1494 bpos = BARPOS;
1495 wa.override_redirect = 1;
1496 wa.background_pixmap = ParentRelative;
1497 wa.event_mask = ButtonPressMask | ExposureMask;
1498 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1499 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1500 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1501 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1502 updatebarpos();
1503 XMapRaised(dpy, barwin);
1504 strcpy(stext, "dwm-"VERSION);
1505 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1506 dc.gc = XCreateGC(dpy, root, 0, 0);
1507 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1508 if(!dc.font.set)
1509 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1510
1511 /* multihead support */
1512 selscreen = XQueryPointer(dpy, root, &w, &w, &d, &d, &d, &d, &mask);
1513 }
1514
1515 void
1516 spawn(const char *arg) {
1517 static char *shell = NULL;
1518
1519 if(!shell && !(shell = getenv("SHELL")))
1520 shell = "/bin/sh";
1521 if(!arg)
1522 return;
1523 /* The double-fork construct avoids zombie processes and keeps the code
1524 * clean from stupid signal handlers. */
1525 if(fork() == 0) {
1526 if(fork() == 0) {
1527 if(dpy)
1528 close(ConnectionNumber(dpy));
1529 setsid();
1530 execl(shell, shell, "-c", arg, (char *)NULL);
1531 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1532 perror(" failed");
1533 }
1534 exit(0);
1535 }
1536 wait(0);
1537 }
1538
1539 void
1540 tag(const char *arg) {
1541 unsigned int i;
1542
1543 if(!sel)
1544 return;
1545 for(i = 0; i < ntags; i++)
1546 sel->tags[i] = arg == NULL;
1547 i = idxoftag(arg);
1548 if(i >= 0 && i < ntags)
1549 sel->tags[i] = True;
1550 arrange();
1551 }
1552
1553 unsigned int
1554 textnw(const char *text, unsigned int len) {
1555 XRectangle r;
1556
1557 if(dc.font.set) {
1558 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1559 return r.width;
1560 }
1561 return XTextWidth(dc.font.xfont, text, len);
1562 }
1563
1564 unsigned int
1565 textw(const char *text) {
1566 return textnw(text, strlen(text)) + dc.font.height;
1567 }
1568
1569 void
1570 tile(void) {
1571 unsigned int i, n, nx, ny, nw, nh, mw, th;
1572 Client *c, *mc;
1573
1574 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1575 n++;
1576
1577 /* window geoms */
1578 mw = (n == 1) ? waw : mwfact * waw;
1579 th = (n > 1) ? wah / (n - 1) : 0;
1580 if(n > 1 && th < bh)
1581 th = wah;
1582
1583 nx = wax;
1584 ny = way;
1585 nw = 0; /* gcc stupidity requires this */
1586 for(i = 0, c = mc = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1587 c->ismax = False;
1588 if(i == 0) { /* master */
1589 nw = mw - 2 * c->border;
1590 nh = wah - 2 * c->border;
1591 }
1592 else { /* tile window */
1593 if(i == 1) {
1594 ny = way;
1595 nx += mc->w + 2 * mc->border;
1596 nw = waw - nx - 2 * c->border;
1597 }
1598 if(i + 1 == n) /* remainder */
1599 nh = (way + wah) - ny - 2 * c->border;
1600 else
1601 nh = th - 2 * c->border;
1602 }
1603 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1604 if(n > 1 && th != wah)
1605 ny = c->y + c->h + 2 * c->border;
1606 }
1607 }
1608
1609 void
1610 togglebar(const char *arg) {
1611 if(bpos == BarOff)
1612 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1613 else
1614 bpos = BarOff;
1615 updatebarpos();
1616 arrange();
1617 }
1618
1619 void
1620 togglefloating(const char *arg) {
1621 if(!sel)
1622 return;
1623 sel->isfloating = !sel->isfloating;
1624 if(sel->isfloating)
1625 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1626 arrange();
1627 }
1628
1629 void
1630 togglemax(const char *arg) {
1631 XEvent ev;
1632
1633 if(!sel || sel->isfixed)
1634 return;
1635 if((sel->ismax = !sel->ismax)) {
1636 if(isarrange(floating) || sel->isfloating)
1637 sel->wasfloating = True;
1638 else {
1639 togglefloating(NULL);
1640 sel->wasfloating = False;
1641 }
1642 sel->rx = sel->x;
1643 sel->ry = sel->y;
1644 sel->rw = sel->w;
1645 sel->rh = sel->h;
1646 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1647 }
1648 else {
1649 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1650 if(!sel->wasfloating)
1651 togglefloating(NULL);
1652 }
1653 drawbar();
1654 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1655 }
1656
1657 void
1658 toggletag(const char *arg) {
1659 unsigned int i, j;
1660
1661 if(!sel)
1662 return;
1663 i = idxoftag(arg);
1664 sel->tags[i] = !sel->tags[i];
1665 for(j = 0; j < ntags && !sel->tags[j]; j++);
1666 if(j == ntags)
1667 sel->tags[i] = True;
1668 arrange();
1669 }
1670
1671 void
1672 toggleview(const char *arg) {
1673 unsigned int i, j;
1674
1675 i = idxoftag(arg);
1676 seltags[i] = !seltags[i];
1677 for(j = 0; j < ntags && !seltags[j]; j++);
1678 if(j == ntags)
1679 seltags[i] = True; /* at least one tag must be viewed */
1680 arrange();
1681 }
1682
1683 void
1684 unban(Client *c) {
1685 if(!c->isbanned)
1686 return;
1687 XMoveWindow(dpy, c->win, c->x, c->y);
1688 c->isbanned = False;
1689 }
1690
1691 void
1692 unmanage(Client *c) {
1693 XWindowChanges wc;
1694
1695 wc.border_width = c->oldborder;
1696 /* The server grab construct avoids race conditions. */
1697 XGrabServer(dpy);
1698 XSetErrorHandler(xerrordummy);
1699 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1700 detach(c);
1701 detachstack(c);
1702 if(sel == c)
1703 focus(NULL);
1704 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1705 setclientstate(c, WithdrawnState);
1706 free(c->tags);
1707 free(c);
1708 XSync(dpy, False);
1709 XSetErrorHandler(xerror);
1710 XUngrabServer(dpy);
1711 arrange();
1712 }
1713
1714 void
1715 unmapnotify(XEvent *e) {
1716 Client *c;
1717 XUnmapEvent *ev = &e->xunmap;
1718
1719 if((c = getclient(ev->window)))
1720 unmanage(c);
1721 }
1722
1723 void
1724 updatebarpos(void) {
1725 XEvent ev;
1726
1727 wax = sx;
1728 way = sy;
1729 wah = sh;
1730 waw = sw;
1731 switch(bpos) {
1732 default:
1733 wah -= bh;
1734 way += bh;
1735 XMoveWindow(dpy, barwin, sx, sy);
1736 break;
1737 case BarBot:
1738 wah -= bh;
1739 XMoveWindow(dpy, barwin, sx, sy + wah);
1740 break;
1741 case BarOff:
1742 XMoveWindow(dpy, barwin, sx, sy - bh);
1743 break;
1744 }
1745 XSync(dpy, False);
1746 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1747 }
1748
1749 void
1750 updatesizehints(Client *c) {
1751 long msize;
1752 XSizeHints size;
1753
1754 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1755 size.flags = PSize;
1756 c->flags = size.flags;
1757 if(c->flags & PBaseSize) {
1758 c->basew = size.base_width;
1759 c->baseh = size.base_height;
1760 }
1761 else if(c->flags & PMinSize) {
1762 c->basew = size.min_width;
1763 c->baseh = size.min_height;
1764 }
1765 else
1766 c->basew = c->baseh = 0;
1767 if(c->flags & PResizeInc) {
1768 c->incw = size.width_inc;
1769 c->inch = size.height_inc;
1770 }
1771 else
1772 c->incw = c->inch = 0;
1773 if(c->flags & PMaxSize) {
1774 c->maxw = size.max_width;
1775 c->maxh = size.max_height;
1776 }
1777 else
1778 c->maxw = c->maxh = 0;
1779 if(c->flags & PMinSize) {
1780 c->minw = size.min_width;
1781 c->minh = size.min_height;
1782 }
1783 else if(c->flags & PBaseSize) {
1784 c->minw = size.base_width;
1785 c->minh = size.base_height;
1786 }
1787 else
1788 c->minw = c->minh = 0;
1789 if(c->flags & PAspect) {
1790 c->minax = size.min_aspect.x;
1791 c->maxax = size.max_aspect.x;
1792 c->minay = size.min_aspect.y;
1793 c->maxay = size.max_aspect.y;
1794 }
1795 else
1796 c->minax = c->maxax = c->minay = c->maxay = 0;
1797 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1798 && c->maxw == c->minw && c->maxh == c->minh);
1799 }
1800
1801 void
1802 updatetitle(Client *c) {
1803 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1804 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1805 }
1806
1807 /* There's no way to check accesses to destroyed windows, thus those cases are
1808 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1809 * default error handler, which may call exit. */
1810 int
1811 xerror(Display *dpy, XErrorEvent *ee) {
1812 if(ee->error_code == BadWindow
1813 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1814 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1815 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1816 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1817 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1818 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1819 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1820 return 0;
1821 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1822 ee->request_code, ee->error_code);
1823 return xerrorxlib(dpy, ee); /* may call exit */
1824 }
1825
1826 int
1827 xerrordummy(Display *dsply, XErrorEvent *ee) {
1828 return 0;
1829 }
1830
1831 /* Startup Error handler to check if another window manager
1832 * is already running. */
1833 int
1834 xerrorstart(Display *dsply, XErrorEvent *ee) {
1835 otherwm = True;
1836 return -1;
1837 }
1838
1839 void
1840 view(const char *arg) {
1841 unsigned int i;
1842
1843 for(i = 0; i < ntags; i++)
1844 seltags[i] = arg == NULL;
1845 i = idxoftag(arg);
1846 if(i >= 0 && i < ntags)
1847 seltags[i] = True;
1848 arrange();
1849 }
1850
1851 void
1852 zoom(const char *arg) {
1853 Client *c;
1854
1855 if(!sel || !ISTILE || sel->isfloating)
1856 return;
1857 if((c = sel) == nexttiled(clients))
1858 if(!(c = nexttiled(c->next)))
1859 return;
1860 detach(c);
1861 attach(c);
1862 focus(c);
1863 arrange();
1864 }
1865
1866 int
1867 main(int argc, char *argv[]) {
1868 if(argc == 2 && !strcmp("-v", argv[1]))
1869 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1870 else if(argc != 1)
1871 eprint("usage: dwm [-v]\n");
1872
1873 setlocale(LC_CTYPE, "");
1874 if(!(dpy = XOpenDisplay(0)))
1875 eprint("dwm: cannot open display\n");
1876 screen = DefaultScreen(dpy);
1877 root = RootWindow(dpy, screen);
1878
1879 checkotherwm();
1880 setup();
1881 drawbar();
1882 scan();
1883 run();
1884 cleanup();
1885
1886 XCloseDisplay(dpy);
1887 return 0;
1888 }