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