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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 the config.h
25 * file. These arrays are kept static in event.o and tag.o respectively,
26 * because no other part of dwm needs access to them. The current layout is
27 * represented by the lt pointer.
28 *
29 * To understand everything else, start reading main().
30 */
31 #include <errno.h>
32 #include <locale.h>
33 #include <regex.h>
34 #include <stdarg.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39 #include <sys/select.h>
40 #include <sys/wait.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 /* enums */
53 enum { BarTop, BarBot, BarOff }; /* bar position */
54 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
55 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
56 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
57 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
58
59 /* typedefs */
60 typedef struct Client Client;
61 struct Client {
62 char name[256];
63 int x, y, w, h;
64 int rx, ry, rw, rh; /* revert geometry */
65 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
66 int minax, maxax, minay, maxay;
67 long flags;
68 unsigned int border, oldborder;
69 Bool isbanned, isfixed, ismax, isfloating;
70 Bool *tags;
71 Client *next;
72 Client *prev;
73 Client *snext;
74 Window win;
75 };
76
77 typedef struct {
78 int x, y, w, h;
79 unsigned long norm[ColLast];
80 unsigned long sel[ColLast];
81 Drawable drawable;
82 GC gc;
83 struct {
84 int ascent;
85 int descent;
86 int height;
87 XFontSet set;
88 XFontStruct *xfont;
89 } font;
90 } DC; /* draw context */
91
92 typedef struct {
93 unsigned long mod;
94 KeySym keysym;
95 void (*func)(const char *arg);
96 const char *arg;
97 } Key;
98
99 typedef struct {
100 const char *symbol;
101 void (*arrange)(void);
102 } Layout;
103
104 typedef struct {
105 const char *prop;
106 const char *tags;
107 Bool isfloating;
108 } Rule;
109
110 typedef struct {
111 regex_t *propregex;
112 regex_t *tagregex;
113 } Regs;
114
115 /* functions */
116
117 static void applyrules(Client *c);
118 static void arrange(void);
119 static void attach(Client *c);
120 static void attachstack(Client *c);
121 static void ban(Client *c);
122 static void buttonpress(XEvent *e);
123 static void cleanup(void);
124 static void compileregs(void);
125 static void configure(Client *c);
126 static void configurenotify(XEvent *e);
127 static void configurerequest(XEvent *e);
128 static void destroynotify(XEvent *e);
129 static void detach(Client *c);
130 static void detachstack(Client *c);
131 static void drawbar(void);
132 static void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
133 static void drawtext(const char *text, unsigned long col[ColLast]);
134 static void *emallocz(unsigned int size);
135 static void enternotify(XEvent *e);
136 static void eprint(const char *errstr, ...);
137 static void expose(XEvent *e);
138 static void floating(void); /* default floating layout */
139 static void focus(Client *c);
140 static void focusnext(const char *arg);
141 static void focusprev(const char *arg);
142 static Client *getclient(Window w);
143 static long getstate(Window w);
144 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
145 static void grabbuttons(Client *c, Bool focused);
146 static unsigned int idxoftag(const char *tag);
147 static void initbar(void);
148 static unsigned long initcolor(const char *colstr);
149 static void initfont(const char *fontstr);
150 static void initlayouts(void);
151 static void initstyle(void);
152 static Bool isarrange(void (*func)());
153 static Bool isfloating(void);
154 static Bool isoccupied(unsigned int t);
155 static Bool isprotodel(Client *c);
156 static Bool isvisible(Client *c);
157 static void keypress(XEvent *e);
158 static void killclient(const char *arg);
159 static void leavenotify(XEvent *e);
160 static void manage(Window w, XWindowAttributes *wa);
161 static void mappingnotify(XEvent *e);
162 static void maprequest(XEvent *e);
163 static void movemouse(Client *c);
164 static Client *nexttiled(Client *c);
165 static void propertynotify(XEvent *e);
166 static void quit(const char *arg);
167 static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
168 static void resizemouse(Client *c);
169 static void restack(void);
170 static void scan(void);
171 static void setclientstate(Client *c, long state);
172 static void setlayout(const char *arg);
173 static void setmwfact(const char *arg);
174 static void setup(void);
175 static void spawn(const char *arg);
176 static void tag(const char *arg);
177 static unsigned int textnw(const char *text, unsigned int len);
178 static unsigned int textw(const char *text);
179 static void tile(void);
180 static void togglebar(const char *arg);
181 static void togglefloating(const char *arg);
182 static void togglemax(const char *arg);
183 static void toggletag(const char *arg);
184 static void toggleview(const char *arg);
185 static void unban(Client *c);
186 static void unmanage(Client *c);
187 static void unmapnotify(XEvent *e);
188 static void updatebarpos(void);
189 static void updatesizehints(Client *c);
190 static void updatetitle(Client *c);
191 static void view(const char *arg);
192 static int xerror(Display *dpy, XErrorEvent *ee);
193 static int xerrordummy(Display *dsply, XErrorEvent *ee);
194 static int xerrorstart(Display *dsply, XErrorEvent *ee);
195 static void zoom(const char *arg);
196
197 /* variables */
198 static char stext[256];
199 static double mwfact;
200 static int screen, sx, sy, sw, sh, wax, way, waw, wah;
201 static int (*xerrorxlib)(Display *, XErrorEvent *);
202 static unsigned int bh, bpos, ntags;
203 static unsigned int blw = 0;
204 static unsigned int ltidx = 0; /* default */
205 static unsigned int nlayouts = 0;
206 static unsigned int nrules = 0;
207 static unsigned int numlockmask = 0;
208 static void (*handler[LASTEvent]) (XEvent *) = {
209 [ButtonPress] = buttonpress,
210 [ConfigureRequest] = configurerequest,
211 [ConfigureNotify] = configurenotify,
212 [DestroyNotify] = destroynotify,
213 [EnterNotify] = enternotify,
214 [LeaveNotify] = leavenotify,
215 [Expose] = expose,
216 [KeyPress] = keypress,
217 [MappingNotify] = mappingnotify,
218 [MapRequest] = maprequest,
219 [PropertyNotify] = propertynotify,
220 [UnmapNotify] = unmapnotify
221 };
222 static Atom wmatom[WMLast], netatom[NetLast];
223 static Bool otherwm, readin;
224 static Bool running = True;
225 static Bool *seltags;
226 static Bool selscreen = True;
227 static Client *clients = NULL;
228 static Client *sel = NULL;
229 static Client *stack = NULL;
230 static Cursor cursor[CurLast];
231 static Display *dpy;
232 static DC dc = {0};
233 static Window barwin, root;
234 static Regs *regs = NULL;
235
236 /* configuration, allows nested code to access above variables */
237 #include "config.h"
238
239 /* implementation */
240 static void
241 applyrules(Client *c) {
242 static char buf[512];
243 unsigned int i, j;
244 regmatch_t tmp;
245 Bool matched = False;
246 XClassHint ch = { 0 };
247
248 /* rule matching */
249 XGetClassHint(dpy, c->win, &ch);
250 snprintf(buf, sizeof buf, "%s:%s:%s",
251 ch.res_class ? ch.res_class : "",
252 ch.res_name ? ch.res_name : "", c->name);
253 for(i = 0; i < nrules; i++)
254 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
255 c->isfloating = rules[i].isfloating;
256 for(j = 0; regs[i].tagregex && j < ntags; j++) {
257 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
258 matched = True;
259 c->tags[j] = True;
260 }
261 }
262 }
263 if(ch.res_class)
264 XFree(ch.res_class);
265 if(ch.res_name)
266 XFree(ch.res_name);
267 if(!matched)
268 for(i = 0; i < ntags; i++)
269 c->tags[i] = seltags[i];
270 }
271
272 static void
273 arrange(void) {
274 Client *c;
275
276 for(c = clients; c; c = c->next)
277 if(isvisible(c))
278 unban(c);
279 else
280 ban(c);
281 layouts[ltidx].arrange();
282 focus(NULL);
283 restack();
284 }
285
286 static void
287 attach(Client *c) {
288 if(clients)
289 clients->prev = c;
290 c->next = clients;
291 clients = c;
292 }
293
294 static void
295 attachstack(Client *c) {
296 c->snext = stack;
297 stack = c;
298 }
299
300 static void
301 ban(Client *c) {
302 if(c->isbanned)
303 return;
304 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
305 c->isbanned = True;
306 }
307
308 static void
309 buttonpress(XEvent *e) {
310 unsigned int i, x;
311 Client *c;
312 XButtonPressedEvent *ev = &e->xbutton;
313
314 if(barwin == ev->window) {
315 x = 0;
316 for(i = 0; i < ntags; i++) {
317 x += textw(tags[i]);
318 if(ev->x < x) {
319 if(ev->button == Button1) {
320 if(ev->state & MODKEY)
321 tag(tags[i]);
322 else
323 view(tags[i]);
324 }
325 else if(ev->button == Button3) {
326 if(ev->state & MODKEY)
327 toggletag(tags[i]);
328 else
329 toggleview(tags[i]);
330 }
331 return;
332 }
333 }
334 if((ev->x < x + blw) && ev->button == Button1)
335 setlayout(NULL);
336 }
337 else if((c = getclient(ev->window))) {
338 focus(c);
339 if(CLEANMASK(ev->state) != MODKEY)
340 return;
341 if(ev->button == Button1 && (isfloating() || c->isfloating)) {
342 restack();
343 movemouse(c);
344 }
345 else if(ev->button == Button2)
346 zoom(NULL);
347 else if(ev->button == Button3
348 && (isfloating() || c->isfloating) && !c->isfixed)
349 {
350 restack();
351 resizemouse(c);
352 }
353 }
354 }
355
356 static void
357 cleanup(void) {
358 close(STDIN_FILENO);
359 while(stack) {
360 unban(stack);
361 unmanage(stack);
362 }
363 if(dc.font.set)
364 XFreeFontSet(dpy, dc.font.set);
365 else
366 XFreeFont(dpy, dc.font.xfont);
367 XUngrabKey(dpy, AnyKey, AnyModifier, root);
368 XFreePixmap(dpy, dc.drawable);
369 XFreeGC(dpy, dc.gc);
370 XDestroyWindow(dpy, barwin);
371 XFreeCursor(dpy, cursor[CurNormal]);
372 XFreeCursor(dpy, cursor[CurResize]);
373 XFreeCursor(dpy, cursor[CurMove]);
374 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
375 XSync(dpy, False);
376 free(seltags);
377 }
378
379 static void
380 compileregs(void) {
381 unsigned int i;
382 regex_t *reg;
383
384 if(regs)
385 return;
386 nrules = sizeof rules / sizeof rules[0];
387 regs = emallocz(nrules * sizeof(Regs));
388 for(i = 0; i < nrules; i++) {
389 if(rules[i].prop) {
390 reg = emallocz(sizeof(regex_t));
391 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
392 free(reg);
393 else
394 regs[i].propregex = reg;
395 }
396 if(rules[i].tags) {
397 reg = emallocz(sizeof(regex_t));
398 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
399 free(reg);
400 else
401 regs[i].tagregex = reg;
402 }
403 }
404 }
405
406 static void
407 configure(Client *c) {
408 XConfigureEvent ce;
409
410 ce.type = ConfigureNotify;
411 ce.display = dpy;
412 ce.event = c->win;
413 ce.window = c->win;
414 ce.x = c->x;
415 ce.y = c->y;
416 ce.width = c->w;
417 ce.height = c->h;
418 ce.border_width = c->border;
419 ce.above = None;
420 ce.override_redirect = False;
421 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
422 }
423
424 static void
425 configurenotify(XEvent *e) {
426 XConfigureEvent *ev = &e->xconfigure;
427
428 if (ev->window == root && (ev->width != sw || ev->height != sh)) {
429 sw = ev->width;
430 sh = ev->height;
431 XFreePixmap(dpy, dc.drawable);
432 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
433 XResizeWindow(dpy, barwin, sw, bh);
434 updatebarpos();
435 arrange();
436 }
437 }
438
439 static void
440 configurerequest(XEvent *e) {
441 Client *c;
442 XConfigureRequestEvent *ev = &e->xconfigurerequest;
443 XWindowChanges wc;
444
445 if((c = getclient(ev->window))) {
446 c->ismax = False;
447 if(ev->value_mask & CWBorderWidth)
448 c->border = ev->border_width;
449 if(c->isfixed || c->isfloating || isfloating()) {
450 if(ev->value_mask & CWX)
451 c->x = ev->x;
452 if(ev->value_mask & CWY)
453 c->y = ev->y;
454 if(ev->value_mask & CWWidth)
455 c->w = ev->width;
456 if(ev->value_mask & CWHeight)
457 c->h = ev->height;
458 if((c->x + c->w) > sw && c->isfloating)
459 c->x = sw / 2 - c->w / 2; /* center in x direction */
460 if((c->y + c->h) > sh && c->isfloating)
461 c->y = sh / 2 - c->h / 2; /* center in y direction */
462 if((ev->value_mask & (CWX | CWY))
463 && !(ev->value_mask & (CWWidth | CWHeight)))
464 configure(c);
465 if(isvisible(c))
466 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
467 }
468 else
469 configure(c);
470 }
471 else {
472 wc.x = ev->x;
473 wc.y = ev->y;
474 wc.width = ev->width;
475 wc.height = ev->height;
476 wc.border_width = ev->border_width;
477 wc.sibling = ev->above;
478 wc.stack_mode = ev->detail;
479 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
480 }
481 XSync(dpy, False);
482 }
483
484 static void
485 destroynotify(XEvent *e) {
486 Client *c;
487 XDestroyWindowEvent *ev = &e->xdestroywindow;
488
489 if((c = getclient(ev->window)))
490 unmanage(c);
491 }
492
493 static void
494 detach(Client *c) {
495 if(c->prev)
496 c->prev->next = c->next;
497 if(c->next)
498 c->next->prev = c->prev;
499 if(c == clients)
500 clients = c->next;
501 c->next = c->prev = NULL;
502 }
503
504 static void
505 detachstack(Client *c) {
506 Client **tc;
507
508 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
509 *tc = c->snext;
510 }
511
512 static void
513 drawbar(void) {
514 int i, x;
515
516 dc.x = dc.y = 0;
517 for(i = 0; i < ntags; i++) {
518 dc.w = textw(tags[i]);
519 if(seltags[i]) {
520 drawtext(tags[i], dc.sel);
521 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
522 }
523 else {
524 drawtext(tags[i], dc.norm);
525 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
526 }
527 dc.x += dc.w;
528 }
529 dc.w = blw;
530 drawtext(layouts[ltidx].symbol, dc.norm);
531 x = dc.x + dc.w;
532 dc.w = textw(stext);
533 dc.x = sw - dc.w;
534 if(dc.x < x) {
535 dc.x = x;
536 dc.w = sw - x;
537 }
538 drawtext(stext, dc.norm);
539 if((dc.w = dc.x - x) > bh) {
540 dc.x = x;
541 if(sel) {
542 drawtext(sel->name, dc.sel);
543 drawsquare(sel->ismax, sel->isfloating, dc.sel);
544 }
545 else
546 drawtext(NULL, dc.norm);
547 }
548 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
549 XSync(dpy, False);
550 }
551
552 static void
553 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
554 int x;
555 XGCValues gcv;
556 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
557
558 gcv.foreground = col[ColFG];
559 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
560 x = (dc.font.ascent + dc.font.descent + 2) / 4;
561 r.x = dc.x + 1;
562 r.y = dc.y + 1;
563 if(filled) {
564 r.width = r.height = x + 1;
565 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
566 }
567 else if(empty) {
568 r.width = r.height = x;
569 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
570 }
571 }
572
573 static void
574 drawtext(const char *text, unsigned long col[ColLast]) {
575 int x, y, w, h;
576 static char buf[256];
577 unsigned int len, olen;
578 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
579
580 XSetForeground(dpy, dc.gc, col[ColBG]);
581 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
582 if(!text)
583 return;
584 w = 0;
585 olen = len = strlen(text);
586 if(len >= sizeof buf)
587 len = sizeof buf - 1;
588 memcpy(buf, text, len);
589 buf[len] = 0;
590 h = dc.font.ascent + dc.font.descent;
591 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
592 x = dc.x + (h / 2);
593 /* shorten text if necessary */
594 while(len && (w = textnw(buf, len)) > dc.w - h)
595 buf[--len] = 0;
596 if(len < olen) {
597 if(len > 1)
598 buf[len - 1] = '.';
599 if(len > 2)
600 buf[len - 2] = '.';
601 if(len > 3)
602 buf[len - 3] = '.';
603 }
604 if(w > dc.w)
605 return; /* too long */
606 XSetForeground(dpy, dc.gc, col[ColFG]);
607 if(dc.font.set)
608 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
609 else
610 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
611 }
612
613 static void *
614 emallocz(unsigned int size) {
615 void *res = calloc(1, size);
616
617 if(!res)
618 eprint("fatal: could not malloc() %u bytes\n", size);
619 return res;
620 }
621
622 static void
623 enternotify(XEvent *e) {
624 Client *c;
625 XCrossingEvent *ev = &e->xcrossing;
626
627 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
628 return;
629 if((c = getclient(ev->window)))
630 focus(c);
631 else if(ev->window == root) {
632 selscreen = True;
633 focus(NULL);
634 }
635 }
636
637 static void
638 eprint(const char *errstr, ...) {
639 va_list ap;
640
641 va_start(ap, errstr);
642 vfprintf(stderr, errstr, ap);
643 va_end(ap);
644 exit(EXIT_FAILURE);
645 }
646
647 static void
648 expose(XEvent *e) {
649 XExposeEvent *ev = &e->xexpose;
650
651 if(ev->count == 0) {
652 if(barwin == ev->window)
653 drawbar();
654 }
655 }
656
657 static void
658 floating(void) { /* default floating layout */
659 Client *c;
660
661 for(c = clients; c; c = c->next)
662 if(isvisible(c))
663 resize(c, c->x, c->y, c->w, c->h, True);
664 }
665
666 static void
667 focus(Client *c) {
668 if((!c && selscreen) || (c && !isvisible(c)))
669 for(c = stack; c && !isvisible(c); c = c->snext);
670 if(sel && sel != c) {
671 grabbuttons(sel, False);
672 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
673 }
674 if(c) {
675 detachstack(c);
676 attachstack(c);
677 grabbuttons(c, True);
678 }
679 sel = c;
680 drawbar();
681 if(!selscreen)
682 return;
683 if(c) {
684 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
685 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
686 }
687 else
688 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
689 }
690
691 static void
692 focusnext(const char *arg) {
693 Client *c;
694
695 if(!sel)
696 return;
697 for(c = sel->next; c && !isvisible(c); c = c->next);
698 if(!c)
699 for(c = clients; c && !isvisible(c); c = c->next);
700 if(c) {
701 focus(c);
702 restack();
703 }
704 }
705
706 static void
707 focusprev(const char *arg) {
708 Client *c;
709
710 if(!sel)
711 return;
712 for(c = sel->prev; c && !isvisible(c); c = c->prev);
713 if(!c) {
714 for(c = clients; c && c->next; c = c->next);
715 for(; c && !isvisible(c); c = c->prev);
716 }
717 if(c) {
718 focus(c);
719 restack();
720 }
721 }
722
723 static Client *
724 getclient(Window w) {
725 Client *c;
726
727 for(c = clients; c && c->win != w; c = c->next);
728 return c;
729 }
730
731 static long
732 getstate(Window w) {
733 int format, status;
734 long result = -1;
735 unsigned char *p = NULL;
736 unsigned long n, extra;
737 Atom real;
738
739 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
740 &real, &format, &n, &extra, (unsigned char **)&p);
741 if(status != Success)
742 return -1;
743 if(n != 0)
744 result = *p;
745 XFree(p);
746 return result;
747 }
748
749 static Bool
750 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
751 char **list = NULL;
752 int n;
753 XTextProperty name;
754
755 if(!text || size == 0)
756 return False;
757 text[0] = '\0';
758 XGetTextProperty(dpy, w, &name, atom);
759 if(!name.nitems)
760 return False;
761 if(name.encoding == XA_STRING)
762 strncpy(text, (char *)name.value, size - 1);
763 else {
764 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
765 && n > 0 && *list)
766 {
767 strncpy(text, *list, size - 1);
768 XFreeStringList(list);
769 }
770 }
771 text[size - 1] = '\0';
772 XFree(name.value);
773 return True;
774 }
775
776 static void
777 grabbuttons(Client *c, Bool focused) {
778 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
779
780 if(focused) {
781 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
782 GrabModeAsync, GrabModeSync, None, None);
783 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
784 GrabModeAsync, GrabModeSync, None, None);
785 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
786 GrabModeAsync, GrabModeSync, None, None);
787 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
788 GrabModeAsync, GrabModeSync, None, None);
789
790 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
791 GrabModeAsync, GrabModeSync, None, None);
792 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
793 GrabModeAsync, GrabModeSync, None, None);
794 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
795 GrabModeAsync, GrabModeSync, None, None);
796 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
797 GrabModeAsync, GrabModeSync, None, None);
798
799 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
800 GrabModeAsync, GrabModeSync, None, None);
801 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
802 GrabModeAsync, GrabModeSync, None, None);
803 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
804 GrabModeAsync, GrabModeSync, None, None);
805 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
806 GrabModeAsync, GrabModeSync, None, None);
807 }
808 else
809 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
810 GrabModeAsync, GrabModeSync, None, None);
811 }
812
813 static unsigned int
814 idxoftag(const char *tag) {
815 unsigned int i;
816
817 for(i = 0; i < ntags; i++)
818 if(tags[i] == tag)
819 return i;
820 return 0;
821 }
822
823 static void
824 initbar(void) {
825 XSetWindowAttributes wa;
826
827 wa.override_redirect = 1;
828 wa.background_pixmap = ParentRelative;
829 wa.event_mask = ButtonPressMask | ExposureMask;
830 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
831 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
832 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
833 XDefineCursor(dpy, barwin, cursor[CurNormal]);
834 updatebarpos();
835 XMapRaised(dpy, barwin);
836 strcpy(stext, "dwm-"VERSION);
837 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
838 dc.gc = XCreateGC(dpy, root, 0, 0);
839 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
840 if(!dc.font.set)
841 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
842 }
843
844 static unsigned long
845 initcolor(const char *colstr) {
846 Colormap cmap = DefaultColormap(dpy, screen);
847 XColor color;
848
849 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
850 eprint("error, cannot allocate color '%s'\n", colstr);
851 return color.pixel;
852 }
853
854 static void
855 initfont(const char *fontstr) {
856 char *def, **missing;
857 int i, n;
858
859 missing = NULL;
860 if(dc.font.set)
861 XFreeFontSet(dpy, dc.font.set);
862 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
863 if(missing) {
864 while(n--)
865 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
866 XFreeStringList(missing);
867 }
868 if(dc.font.set) {
869 XFontSetExtents *font_extents;
870 XFontStruct **xfonts;
871 char **font_names;
872 dc.font.ascent = dc.font.descent = 0;
873 font_extents = XExtentsOfFontSet(dc.font.set);
874 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
875 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
876 if(dc.font.ascent < (*xfonts)->ascent)
877 dc.font.ascent = (*xfonts)->ascent;
878 if(dc.font.descent < (*xfonts)->descent)
879 dc.font.descent = (*xfonts)->descent;
880 xfonts++;
881 }
882 }
883 else {
884 if(dc.font.xfont)
885 XFreeFont(dpy, dc.font.xfont);
886 dc.font.xfont = NULL;
887 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
888 || !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
889 eprint("error, cannot load font: '%s'\n", fontstr);
890 dc.font.ascent = dc.font.xfont->ascent;
891 dc.font.descent = dc.font.xfont->descent;
892 }
893 dc.font.height = dc.font.ascent + dc.font.descent;
894 }
895
896 static void
897 initlayouts(void) {
898 unsigned int i, w;
899
900 nlayouts = sizeof layouts / sizeof layouts[0];
901 for(blw = i = 0; i < nlayouts; i++) {
902 w = textw(layouts[i].symbol);
903 if(w > blw)
904 blw = w;
905 }
906 }
907
908 static void
909 initstyle(void) {
910 dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
911 dc.norm[ColBG] = initcolor(NORMBGCOLOR);
912 dc.norm[ColFG] = initcolor(NORMFGCOLOR);
913 dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
914 dc.sel[ColBG] = initcolor(SELBGCOLOR);
915 dc.sel[ColFG] = initcolor(SELFGCOLOR);
916 initfont(FONT);
917 dc.h = bh = dc.font.height + 2;
918 }
919
920 static Bool
921 isarrange(void (*func)())
922 {
923 return func == layouts[ltidx].arrange;
924 }
925
926 static Bool
927 isfloating(void) {
928 return layouts[ltidx].arrange == floating;
929 }
930
931 static Bool
932 isoccupied(unsigned int t) {
933 Client *c;
934
935 for(c = clients; c; c = c->next)
936 if(c->tags[t])
937 return True;
938 return False;
939 }
940
941 static Bool
942 isprotodel(Client *c) {
943 int i, n;
944 Atom *protocols;
945 Bool ret = False;
946
947 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
948 for(i = 0; !ret && i < n; i++)
949 if(protocols[i] == wmatom[WMDelete])
950 ret = True;
951 XFree(protocols);
952 }
953 return ret;
954 }
955
956 static Bool
957 isvisible(Client *c) {
958 unsigned int i;
959
960 for(i = 0; i < ntags; i++)
961 if(c->tags[i] && seltags[i])
962 return True;
963 return False;
964 }
965
966 static void
967 keypress(XEvent *e) {
968 KEYS
969 unsigned int len = sizeof keys / sizeof keys[0];
970 unsigned int i;
971 KeyCode code;
972 KeySym keysym;
973 XKeyEvent *ev;
974
975 if(!e) { /* grabkeys */
976 XUngrabKey(dpy, AnyKey, AnyModifier, root);
977 for(i = 0; i < len; i++) {
978 code = XKeysymToKeycode(dpy, keys[i].keysym);
979 XGrabKey(dpy, code, keys[i].mod, root, True,
980 GrabModeAsync, GrabModeAsync);
981 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
982 GrabModeAsync, GrabModeAsync);
983 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
984 GrabModeAsync, GrabModeAsync);
985 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
986 GrabModeAsync, GrabModeAsync);
987 }
988 return;
989 }
990 ev = &e->xkey;
991 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
992 for(i = 0; i < len; i++)
993 if(keysym == keys[i].keysym
994 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
995 {
996 if(keys[i].func)
997 keys[i].func(keys[i].arg);
998 }
999 }
1000
1001 static void
1002 killclient(const char *arg) {
1003 XEvent ev;
1004
1005 if(!sel)
1006 return;
1007 if(isprotodel(sel)) {
1008 ev.type = ClientMessage;
1009 ev.xclient.window = sel->win;
1010 ev.xclient.message_type = wmatom[WMProtocols];
1011 ev.xclient.format = 32;
1012 ev.xclient.data.l[0] = wmatom[WMDelete];
1013 ev.xclient.data.l[1] = CurrentTime;
1014 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1015 }
1016 else
1017 XKillClient(dpy, sel->win);
1018 }
1019
1020 static void
1021 leavenotify(XEvent *e) {
1022 XCrossingEvent *ev = &e->xcrossing;
1023
1024 if((ev->window == root) && !ev->same_screen) {
1025 selscreen = False;
1026 focus(NULL);
1027 }
1028 }
1029
1030 static void
1031 manage(Window w, XWindowAttributes *wa) {
1032 unsigned int i;
1033 Client *c, *t = NULL;
1034 Window trans;
1035 Status rettrans;
1036 XWindowChanges wc;
1037
1038 c = emallocz(sizeof(Client));
1039 c->tags = emallocz(ntags * sizeof(Bool));
1040 c->win = w;
1041 c->x = wa->x;
1042 c->y = wa->y;
1043 c->w = wa->width;
1044 c->h = wa->height;
1045 c->oldborder = wa->border_width;
1046 if(c->w == sw && c->h == sh) {
1047 c->x = sx;
1048 c->y = sy;
1049 c->border = wa->border_width;
1050 }
1051 else {
1052 if(c->x + c->w + 2 * c->border > wax + waw)
1053 c->x = wax + waw - c->w - 2 * c->border;
1054 if(c->y + c->h + 2 * c->border > way + wah)
1055 c->y = way + wah - c->h - 2 * c->border;
1056 if(c->x < wax)
1057 c->x = wax;
1058 if(c->y < way)
1059 c->y = way;
1060 c->border = BORDERPX;
1061 }
1062 wc.border_width = c->border;
1063 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1064 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1065 configure(c); /* propagates border_width, if size doesn't change */
1066 updatesizehints(c);
1067 XSelectInput(dpy, w,
1068 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
1069 grabbuttons(c, False);
1070 updatetitle(c);
1071 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1072 for(t = clients; t && t->win != trans; t = t->next);
1073 if(t)
1074 for(i = 0; i < ntags; i++)
1075 c->tags[i] = t->tags[i];
1076 applyrules(c);
1077 if(!c->isfloating)
1078 c->isfloating = (rettrans == Success) || c->isfixed;
1079 attach(c);
1080 attachstack(c);
1081 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1082 ban(c);
1083 XMapWindow(dpy, c->win);
1084 setclientstate(c, NormalState);
1085 arrange();
1086 }
1087
1088 static void
1089 mappingnotify(XEvent *e) {
1090 XMappingEvent *ev = &e->xmapping;
1091
1092 XRefreshKeyboardMapping(ev);
1093 if(ev->request == MappingKeyboard)
1094 keypress(NULL);
1095 }
1096
1097 static void
1098 maprequest(XEvent *e) {
1099 static XWindowAttributes wa;
1100 XMapRequestEvent *ev = &e->xmaprequest;
1101
1102 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1103 return;
1104 if(wa.override_redirect)
1105 return;
1106 if(!getclient(ev->window))
1107 manage(ev->window, &wa);
1108 }
1109
1110 static void
1111 movemouse(Client *c) {
1112 int x1, y1, ocx, ocy, di, nx, ny;
1113 unsigned int dui;
1114 Window dummy;
1115 XEvent ev;
1116
1117 ocx = nx = c->x;
1118 ocy = ny = c->y;
1119 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1120 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1121 return;
1122 c->ismax = False;
1123 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1124 for(;;) {
1125 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1126 switch (ev.type) {
1127 case ButtonRelease:
1128 XUngrabPointer(dpy, CurrentTime);
1129 return;
1130 case ConfigureRequest:
1131 case Expose:
1132 case MapRequest:
1133 handler[ev.type](&ev);
1134 break;
1135 case MotionNotify:
1136 XSync(dpy, False);
1137 nx = ocx + (ev.xmotion.x - x1);
1138 ny = ocy + (ev.xmotion.y - y1);
1139 if(abs(wax + nx) < SNAP)
1140 nx = wax;
1141 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1142 nx = wax + waw - c->w - 2 * c->border;
1143 if(abs(way - ny) < SNAP)
1144 ny = way;
1145 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1146 ny = way + wah - c->h - 2 * c->border;
1147 resize(c, nx, ny, c->w, c->h, False);
1148 break;
1149 }
1150 }
1151 }
1152
1153 static Client *
1154 nexttiled(Client *c) {
1155 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1156 return c;
1157 }
1158
1159 static void
1160 propertynotify(XEvent *e) {
1161 Client *c;
1162 Window trans;
1163 XPropertyEvent *ev = &e->xproperty;
1164
1165 if(ev->state == PropertyDelete)
1166 return; /* ignore */
1167 if((c = getclient(ev->window))) {
1168 switch (ev->atom) {
1169 default: break;
1170 case XA_WM_TRANSIENT_FOR:
1171 XGetTransientForHint(dpy, c->win, &trans);
1172 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1173 arrange();
1174 break;
1175 case XA_WM_NORMAL_HINTS:
1176 updatesizehints(c);
1177 break;
1178 }
1179 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1180 updatetitle(c);
1181 if(c == sel)
1182 drawbar();
1183 }
1184 }
1185 }
1186
1187 static void
1188 quit(const char *arg) {
1189 readin = running = False;
1190 }
1191
1192 static void
1193 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1194 double dx, dy, max, min, ratio;
1195 XWindowChanges wc;
1196
1197 if(sizehints) {
1198 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
1199 dx = (double)(w - c->basew);
1200 dy = (double)(h - c->baseh);
1201 min = (double)(c->minax) / (double)(c->minay);
1202 max = (double)(c->maxax) / (double)(c->maxay);
1203 ratio = dx / dy;
1204 if(max > 0 && min > 0 && ratio > 0) {
1205 if(ratio < min) {
1206 dy = (dx * min + dy) / (min * min + 1);
1207 dx = dy * min;
1208 w = (int)dx + c->basew;
1209 h = (int)dy + c->baseh;
1210 }
1211 else if(ratio > max) {
1212 dy = (dx * min + dy) / (max * max + 1);
1213 dx = dy * min;
1214 w = (int)dx + c->basew;
1215 h = (int)dy + c->baseh;
1216 }
1217 }
1218 }
1219 if(c->minw && w < c->minw)
1220 w = c->minw;
1221 if(c->minh && h < c->minh)
1222 h = c->minh;
1223 if(c->maxw && w > c->maxw)
1224 w = c->maxw;
1225 if(c->maxh && h > c->maxh)
1226 h = c->maxh;
1227 if(c->incw)
1228 w -= (w - c->basew) % c->incw;
1229 if(c->inch)
1230 h -= (h - c->baseh) % c->inch;
1231 }
1232 if(w <= 0 || h <= 0)
1233 return;
1234 /* offscreen appearance fixes */
1235 if(x > sw)
1236 x = sw - w - 2 * c->border;
1237 if(y > sh)
1238 y = sh - h - 2 * c->border;
1239 if(x + w + 2 * c->border < sx)
1240 x = sx;
1241 if(y + h + 2 * c->border < sy)
1242 y = sy;
1243 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1244 c->x = wc.x = x;
1245 c->y = wc.y = y;
1246 c->w = wc.width = w;
1247 c->h = wc.height = h;
1248 wc.border_width = c->border;
1249 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1250 configure(c);
1251 XSync(dpy, False);
1252 }
1253 }
1254
1255 static void
1256 resizemouse(Client *c) {
1257 int ocx, ocy;
1258 int nw, nh;
1259 XEvent ev;
1260
1261 ocx = c->x;
1262 ocy = c->y;
1263 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1264 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1265 return;
1266 c->ismax = False;
1267 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1268 for(;;) {
1269 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1270 switch(ev.type) {
1271 case ButtonRelease:
1272 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1273 c->w + c->border - 1, c->h + c->border - 1);
1274 XUngrabPointer(dpy, CurrentTime);
1275 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1276 return;
1277 case ConfigureRequest:
1278 case Expose:
1279 case MapRequest:
1280 handler[ev.type](&ev);
1281 break;
1282 case MotionNotify:
1283 XSync(dpy, False);
1284 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1285 nw = 1;
1286 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1287 nh = 1;
1288 resize(c, c->x, c->y, nw, nh, True);
1289 break;
1290 }
1291 }
1292 }
1293
1294 static void
1295 restack(void) {
1296 Client *c;
1297 XEvent ev;
1298 XWindowChanges wc;
1299
1300 drawbar();
1301 if(!sel)
1302 return;
1303 if(sel->isfloating || isfloating())
1304 XRaiseWindow(dpy, sel->win);
1305 if(!isfloating()) {
1306 wc.stack_mode = Below;
1307 wc.sibling = barwin;
1308 if(!sel->isfloating) {
1309 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1310 wc.sibling = sel->win;
1311 }
1312 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1313 if(c == sel)
1314 continue;
1315 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1316 wc.sibling = c->win;
1317 }
1318 }
1319 XSync(dpy, False);
1320 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1321 }
1322
1323 static void
1324 scan(void) {
1325 unsigned int i, num;
1326 Window *wins, d1, d2;
1327 XWindowAttributes wa;
1328
1329 wins = NULL;
1330 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1331 for(i = 0; i < num; i++) {
1332 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1333 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1334 continue;
1335 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1336 manage(wins[i], &wa);
1337 }
1338 for(i = 0; i < num; i++) { /* now the transients */
1339 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1340 continue;
1341 if(XGetTransientForHint(dpy, wins[i], &d1)
1342 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1343 manage(wins[i], &wa);
1344 }
1345 }
1346 if(wins)
1347 XFree(wins);
1348 }
1349
1350 static void
1351 setclientstate(Client *c, long state) {
1352 long data[] = {state, None};
1353
1354 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1355 PropModeReplace, (unsigned char *)data, 2);
1356 }
1357
1358 static void
1359 setlayout(const char *arg) {
1360 unsigned int i;
1361
1362 if(!arg) {
1363 if(++ltidx == nlayouts)
1364 ltidx = 0;;
1365 }
1366 else {
1367 for(i = 0; i < nlayouts; i++)
1368 if(!strcmp(arg, layouts[i].symbol))
1369 break;
1370 if(i == nlayouts)
1371 return;
1372 ltidx = i;
1373 }
1374 if(sel)
1375 arrange();
1376 else
1377 drawbar();
1378 }
1379
1380 static void
1381 setmwfact(const char *arg) {
1382 double delta;
1383
1384 if(!isarrange(tile))
1385 return;
1386 /* arg handling, manipulate mwfact */
1387 if(arg == NULL)
1388 mwfact = MWFACT;
1389 else if(1 == sscanf(arg, "%lf", &delta)) {
1390 if(arg[0] != '+' && arg[0] != '-')
1391 mwfact = delta;
1392 else
1393 mwfact += delta;
1394 if(mwfact < 0.1)
1395 mwfact = 0.1;
1396 else if(mwfact > 0.9)
1397 mwfact = 0.9;
1398 }
1399 arrange();
1400 }
1401
1402 static void
1403 setup(void) {
1404 int i, j;
1405 unsigned int mask;
1406 Window w;
1407 XModifierKeymap *modmap;
1408 XSetWindowAttributes wa;
1409
1410 /* init atoms */
1411 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1412 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1413 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1414 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1415 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1416 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1417 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1418 PropModeReplace, (unsigned char *) netatom, NetLast);
1419 /* init cursors */
1420 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1421 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1422 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1423 /* init modifier map */
1424 modmap = XGetModifierMapping(dpy);
1425 for (i = 0; i < 8; i++)
1426 for (j = 0; j < modmap->max_keypermod; j++) {
1427 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1428 == XKeysymToKeycode(dpy, XK_Num_Lock))
1429 numlockmask = (1 << i);
1430 }
1431 XFreeModifiermap(modmap);
1432 /* select for events */
1433 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1434 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1435 wa.cursor = cursor[CurNormal];
1436 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1437 XSelectInput(dpy, root, wa.event_mask);
1438 keypress(NULL); /* grabkeys */
1439 compileregs();
1440 for(ntags = 0; tags[ntags]; ntags++);
1441 seltags = emallocz(sizeof(Bool) * ntags);
1442 seltags[0] = True;
1443 /* geometry */
1444 sx = sy = 0;
1445 sw = DisplayWidth(dpy, screen);
1446 sh = DisplayHeight(dpy, screen);
1447 initstyle();
1448 initlayouts();
1449 initbar();
1450 /* multihead support */
1451 selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
1452 }
1453
1454 static void
1455 spawn(const char *arg) {
1456 static char *shell = NULL;
1457
1458 if(!shell && !(shell = getenv("SHELL")))
1459 shell = "/bin/sh";
1460 if(!arg)
1461 return;
1462 /* The double-fork construct avoids zombie processes and keeps the code
1463 * clean from stupid signal handlers. */
1464 if(fork() == 0) {
1465 if(fork() == 0) {
1466 if(dpy)
1467 close(ConnectionNumber(dpy));
1468 setsid();
1469 execl(shell, shell, "-c", arg, (char *)NULL);
1470 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1471 perror(" failed");
1472 }
1473 exit(0);
1474 }
1475 wait(0);
1476 }
1477
1478 static void
1479 tag(const char *arg) {
1480 unsigned int i;
1481
1482 if(!sel)
1483 return;
1484 for(i = 0; i < ntags; i++)
1485 sel->tags[i] = arg == NULL;
1486 i = idxoftag(arg);
1487 if(i >= 0 && i < ntags)
1488 sel->tags[i] = True;
1489 arrange();
1490 }
1491
1492 static unsigned int
1493 textnw(const char *text, unsigned int len) {
1494 XRectangle r;
1495
1496 if(dc.font.set) {
1497 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1498 return r.width;
1499 }
1500 return XTextWidth(dc.font.xfont, text, len);
1501 }
1502
1503 static unsigned int
1504 textw(const char *text) {
1505 return textnw(text, strlen(text)) + dc.font.height;
1506 }
1507
1508 static void
1509 tile(void) {
1510 unsigned int i, n, nx, ny, nw, nh, mw, th;
1511 Client *c;
1512
1513 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1514 n++;
1515
1516 /* window geoms */
1517 mw = (n == 1) ? waw : mwfact * waw;
1518 th = (n > 1) ? wah / (n - 1) : 0;
1519 if(n > 1 && th < bh)
1520 th = wah;
1521
1522 nx = wax;
1523 ny = way;
1524 for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1525 c->ismax = False;
1526 if(i == 0) { /* master */
1527 nw = mw - 2 * c->border;
1528 nh = wah - 2 * c->border;
1529 }
1530 else { /* tile window */
1531 if(i == 1) {
1532 ny = way;
1533 nx += mw;
1534 }
1535 nw = waw - mw - 2 * c->border;
1536 if(i + 1 == n) /* remainder */
1537 nh = (way + wah) - ny - 2 * c->border;
1538 else
1539 nh = th - 2 * c->border;
1540 }
1541 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1542 if(n > 1 && th != wah)
1543 ny += nh + 2 * c->border;
1544 }
1545 }
1546
1547 static void
1548 togglebar(const char *arg) {
1549 if(bpos == BarOff)
1550 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1551 else
1552 bpos = BarOff;
1553 updatebarpos();
1554 arrange();
1555 }
1556
1557 static void
1558 togglefloating(const char *arg) {
1559 if(!sel)
1560 return;
1561 sel->isfloating = !sel->isfloating;
1562 if(sel->isfloating)
1563 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1564 arrange();
1565 }
1566
1567 static void
1568 togglemax(const char *arg) {
1569 XEvent ev;
1570
1571 if(!sel || (!isfloating() && !sel->isfloating) || sel->isfixed)
1572 return;
1573 if((sel->ismax = !sel->ismax)) {
1574 sel->rx = sel->x;
1575 sel->ry = sel->y;
1576 sel->rw = sel->w;
1577 sel->rh = sel->h;
1578 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1579 }
1580 else
1581 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1582 drawbar();
1583 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1584 }
1585
1586 static void
1587 toggletag(const char *arg) {
1588 unsigned int i, j;
1589
1590 if(!sel)
1591 return;
1592 i = idxoftag(arg);
1593 sel->tags[i] = !sel->tags[i];
1594 for(j = 0; j < ntags && !sel->tags[j]; j++);
1595 if(j == ntags)
1596 sel->tags[i] = True;
1597 arrange();
1598 }
1599
1600 static void
1601 toggleview(const char *arg) {
1602 unsigned int i, j;
1603
1604 i = idxoftag(arg);
1605 seltags[i] = !seltags[i];
1606 for(j = 0; j < ntags && !seltags[j]; j++);
1607 if(j == ntags)
1608 seltags[i] = True; /* cannot toggle last view */
1609 arrange();
1610 }
1611
1612 static void
1613 unban(Client *c) {
1614 if(!c->isbanned)
1615 return;
1616 XMoveWindow(dpy, c->win, c->x, c->y);
1617 c->isbanned = False;
1618 }
1619
1620 static void
1621 unmanage(Client *c) {
1622 XWindowChanges wc;
1623
1624 wc.border_width = c->oldborder;
1625 /* The server grab construct avoids race conditions. */
1626 XGrabServer(dpy);
1627 XSetErrorHandler(xerrordummy);
1628 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1629 detach(c);
1630 detachstack(c);
1631 if(sel == c)
1632 focus(NULL);
1633 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1634 setclientstate(c, WithdrawnState);
1635 free(c->tags);
1636 free(c);
1637 XSync(dpy, False);
1638 XSetErrorHandler(xerror);
1639 XUngrabServer(dpy);
1640 arrange();
1641 }
1642
1643 static void
1644 unmapnotify(XEvent *e) {
1645 Client *c;
1646 XUnmapEvent *ev = &e->xunmap;
1647
1648 if((c = getclient(ev->window)))
1649 unmanage(c);
1650 }
1651
1652 static void
1653 updatebarpos(void) {
1654 XEvent ev;
1655
1656 wax = sx;
1657 way = sy;
1658 wah = sh;
1659 waw = sw;
1660 switch(bpos) {
1661 default:
1662 wah -= bh;
1663 way += bh;
1664 XMoveWindow(dpy, barwin, sx, sy);
1665 break;
1666 case BarBot:
1667 wah -= bh;
1668 XMoveWindow(dpy, barwin, sx, sy + wah);
1669 break;
1670 case BarOff:
1671 XMoveWindow(dpy, barwin, sx, sy - bh);
1672 break;
1673 }
1674 XSync(dpy, False);
1675 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1676 }
1677
1678 static void
1679 updatesizehints(Client *c) {
1680 long msize;
1681 XSizeHints size;
1682
1683 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1684 size.flags = PSize;
1685 c->flags = size.flags;
1686 if(c->flags & PBaseSize) {
1687 c->basew = size.base_width;
1688 c->baseh = size.base_height;
1689 }
1690 else if(c->flags & PMinSize) {
1691 c->basew = size.min_width;
1692 c->baseh = size.min_height;
1693 }
1694 else
1695 c->basew = c->baseh = 0;
1696 if(c->flags & PResizeInc) {
1697 c->incw = size.width_inc;
1698 c->inch = size.height_inc;
1699 }
1700 else
1701 c->incw = c->inch = 0;
1702 if(c->flags & PMaxSize) {
1703 c->maxw = size.max_width;
1704 c->maxh = size.max_height;
1705 }
1706 else
1707 c->maxw = c->maxh = 0;
1708 if(c->flags & PMinSize) {
1709 c->minw = size.min_width;
1710 c->minh = size.min_height;
1711 }
1712 else if(c->flags & PBaseSize) {
1713 c->minw = size.base_width;
1714 c->minh = size.base_height;
1715 }
1716 else
1717 c->minw = c->minh = 0;
1718 if(c->flags & PAspect) {
1719 c->minax = size.min_aspect.x;
1720 c->maxax = size.max_aspect.x;
1721 c->minay = size.min_aspect.y;
1722 c->maxay = size.max_aspect.y;
1723 }
1724 else
1725 c->minax = c->maxax = c->minay = c->maxay = 0;
1726 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1727 && c->maxw == c->minw && c->maxh == c->minh);
1728 }
1729
1730 static void
1731 updatetitle(Client *c) {
1732 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1733 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1734 }
1735
1736 /* There's no way to check accesses to destroyed windows, thus those cases are
1737 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1738 * default error handler, which may call exit. */
1739 static int
1740 xerror(Display *dpy, XErrorEvent *ee) {
1741 if(ee->error_code == BadWindow
1742 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1743 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1744 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1745 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1746 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1747 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1748 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1749 return 0;
1750 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1751 ee->request_code, ee->error_code);
1752 return xerrorxlib(dpy, ee); /* may call exit */
1753 }
1754
1755 static int
1756 xerrordummy(Display *dsply, XErrorEvent *ee) {
1757 return 0;
1758 }
1759
1760 /* Startup Error handler to check if another window manager
1761 * is already running. */
1762 static int
1763 xerrorstart(Display *dsply, XErrorEvent *ee) {
1764 otherwm = True;
1765 return -1;
1766 }
1767
1768 static void
1769 view(const char *arg) {
1770 unsigned int i;
1771
1772 for(i = 0; i < ntags; i++)
1773 seltags[i] = arg == NULL;
1774 i = idxoftag(arg);
1775 if(i >= 0 && i < ntags)
1776 seltags[i] = True;
1777 arrange();
1778 }
1779
1780 static void
1781 zoom(const char *arg) {
1782 Client *c;
1783
1784 if(!sel || !isarrange(tile) || sel->isfloating)
1785 return;
1786 if((c = sel) == nexttiled(clients))
1787 if(!(c = nexttiled(c->next)))
1788 return;
1789 detach(c);
1790 attach(c);
1791 focus(c);
1792 arrange();
1793 }
1794
1795 int
1796 main(int argc, char *argv[]) {
1797 char *p;
1798 int r, xfd;
1799 fd_set rd;
1800 XEvent ev;
1801
1802 if(argc == 2 && !strcmp("-v", argv[1]))
1803 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1804 else if(argc != 1)
1805 eprint("usage: dwm [-v]\n");
1806
1807 /* macros from config.h can be used at function level only */
1808 mwfact = MWFACT;
1809 bpos = BARPOS;
1810
1811 setlocale(LC_CTYPE, "");
1812 if(!(dpy = XOpenDisplay(0)))
1813 eprint("dwm: cannot open display\n");
1814 xfd = ConnectionNumber(dpy);
1815 screen = DefaultScreen(dpy);
1816 root = RootWindow(dpy, screen);
1817 otherwm = False;
1818 XSetErrorHandler(xerrorstart);
1819 /* this causes an error if some other window manager is running */
1820 XSelectInput(dpy, root, SubstructureRedirectMask);
1821 XSync(dpy, False);
1822 if(otherwm)
1823 eprint("dwm: another window manager is already running\n");
1824
1825 XSync(dpy, False);
1826 XSetErrorHandler(NULL);
1827 xerrorxlib = XSetErrorHandler(xerror);
1828 XSync(dpy, False);
1829 setup();
1830 drawbar();
1831 scan();
1832
1833 /* main event loop, also reads status text from stdin */
1834 XSync(dpy, False);
1835 readin = True;
1836 while(running) {
1837 FD_ZERO(&rd);
1838 if(readin)
1839 FD_SET(STDIN_FILENO, &rd);
1840 FD_SET(xfd, &rd);
1841 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1842 if(errno == EINTR)
1843 continue;
1844 eprint("select failed\n");
1845 }
1846 if(FD_ISSET(STDIN_FILENO, &rd)) {
1847 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1848 case -1:
1849 strncpy(stext, strerror(errno), sizeof stext - 1);
1850 stext[sizeof stext - 1] = '\0';
1851 readin = False;
1852 break;
1853 case 0:
1854 strncpy(stext, "EOF", 4);
1855 readin = False;
1856 break;
1857 default:
1858 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1859 for(; p >= stext && *p != '\n'; --p);
1860 if(p > stext)
1861 strncpy(stext, p + 1, sizeof stext);
1862 }
1863 drawbar();
1864 }
1865 while(XPending(dpy)) {
1866 XNextEvent(dpy, &ev);
1867 if(handler[ev.type])
1868 (handler[ev.type])(&ev); /* call handler */
1869 }
1870 }
1871 cleanup();
1872 XCloseDisplay(dpy);
1873 return 0;
1874 }