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added hint for downloading dextra
[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains an array of Bools of the same size as the
20 * global tags array to indicate the tags of a client. For each client dwm
21 * creates a small title window, which is resized whenever the (_NET_)WM_NAME
22 * properties are updated or the client is moved/resized.
23 *
24 * Keys and tagging rules are organized as arrays and defined in config.h.
25 *
26 * To understand everything else, start reading main().
27 */
28 #include <errno.h>
29 #include <locale.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <unistd.h>
35 #include <sys/select.h>
36 #include <sys/types.h>
37 #include <sys/wait.h>
38 #include <regex.h>
39 #include <X11/cursorfont.h>
40 #include <X11/keysym.h>
41 #include <X11/Xatom.h>
42 #include <X11/Xlib.h>
43 #include <X11/Xproto.h>
44 #include <X11/Xutil.h>
45
46 /* macros */
47 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
48 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
49 #define MOUSEMASK (BUTTONMASK | PointerMotionMask)
50
51 /* enums */
52 enum { BarTop, BarBot, BarOff }; /* bar position */
53 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
54 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
55 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
56 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
57
58 /* typedefs */
59 typedef struct Client Client;
60 struct Client {
61 char name[256];
62 int x, y, w, h;
63 int rx, ry, rw, rh; /* revert geometry */
64 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
65 int minax, maxax, minay, maxay;
66 long flags;
67 unsigned int border, oldborder;
68 Bool isbanned, isfixed, ismax, isfloating, wasfloating;
69 Bool *tags;
70 Client *next;
71 Client *prev;
72 Client *snext;
73 Window win;
74 };
75
76 typedef struct {
77 int x, y, w, h;
78 unsigned long norm[ColLast];
79 unsigned long sel[ColLast];
80 Drawable drawable;
81 GC gc;
82 struct {
83 int ascent;
84 int descent;
85 int height;
86 XFontSet set;
87 XFontStruct *xfont;
88 } font;
89 } DC; /* draw context */
90
91 typedef struct {
92 unsigned long mod;
93 KeySym keysym;
94 void (*func)(const char *arg);
95 const char *arg;
96 } Key;
97
98 typedef struct {
99 const char *symbol;
100 void (*arrange)(void);
101 } Layout;
102
103 typedef struct {
104 const char *prop;
105 const char *tags;
106 Bool isfloating;
107 } Rule;
108
109 typedef struct {
110 regex_t *propregex;
111 regex_t *tagregex;
112 } Regs;
113
114 /* forward declarations */
115 void applyrules(Client *c);
116 void arrange(void);
117 void attach(Client *c);
118 void attachstack(Client *c);
119 void ban(Client *c);
120 void buttonpress(XEvent *e);
121 void checkotherwm(void);
122 void cleanup(void);
123 void compileregs(void);
124 void configure(Client *c);
125 void configurenotify(XEvent *e);
126 void configurerequest(XEvent *e);
127 void destroynotify(XEvent *e);
128 void detach(Client *c);
129 void detachstack(Client *c);
130 void drawbar(void);
131 void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
132 void drawtext(const char *text, unsigned long col[ColLast]);
133 void *emallocz(unsigned int size);
134 void enternotify(XEvent *e);
135 void eprint(const char *errstr, ...);
136 void expose(XEvent *e);
137 void floating(void); /* default floating layout */
138 void focus(Client *c);
139 void focusnext(const char *arg);
140 void focusprev(const char *arg);
141 Client *getclient(Window w);
142 unsigned long getcolor(const char *colstr);
143 long getstate(Window w);
144 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
145 void grabbuttons(Client *c, Bool focused);
146 unsigned int idxoftag(const char *tag);
147 void initfont(const char *fontstr);
148 Bool isarrange(void (*func)());
149 Bool isoccupied(unsigned int t);
150 Bool isprotodel(Client *c);
151 Bool isvisible(Client *c);
152 void keypress(XEvent *e);
153 void killclient(const char *arg);
154 void leavenotify(XEvent *e);
155 void manage(Window w, XWindowAttributes *wa);
156 void mappingnotify(XEvent *e);
157 void maprequest(XEvent *e);
158 void movemouse(Client *c);
159 Client *nexttiled(Client *c);
160 void propertynotify(XEvent *e);
161 void quit(const char *arg);
162 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
163 void resizemouse(Client *c);
164 void restack(void);
165 void run(void);
166 void scan(void);
167 void setclientstate(Client *c, long state);
168 void setlayout(const char *arg);
169 void setmwfact(const char *arg);
170 void setup(void);
171 void spawn(const char *arg);
172 void tag(const char *arg);
173 unsigned int textnw(const char *text, unsigned int len);
174 unsigned int textw(const char *text);
175 void tile(void);
176 void togglebar(const char *arg);
177 void togglefloating(const char *arg);
178 void togglemax(const char *arg);
179 void toggletag(const char *arg);
180 void toggleview(const char *arg);
181 void unban(Client *c);
182 void unmanage(Client *c);
183 void unmapnotify(XEvent *e);
184 void updatebarpos(void);
185 void updatesizehints(Client *c);
186 void updatetitle(Client *c);
187 void view(const char *arg);
188 int xerror(Display *dpy, XErrorEvent *ee);
189 int xerrordummy(Display *dsply, XErrorEvent *ee);
190 int xerrorstart(Display *dsply, XErrorEvent *ee);
191 void zoom(const char *arg);
192
193 /* variables */
194 char stext[256];
195 double mwfact;
196 int screen, sx, sy, sw, sh, wax, way, waw, wah;
197 int (*xerrorxlib)(Display *, XErrorEvent *);
198 unsigned int bh, bpos, ntags;
199 unsigned int blw = 0;
200 unsigned int ltidx = 0; /* default */
201 unsigned int nlayouts = 0;
202 unsigned int nrules = 0;
203 unsigned int numlockmask = 0;
204 void (*handler[LASTEvent]) (XEvent *) = {
205 [ButtonPress] = buttonpress,
206 [ConfigureRequest] = configurerequest,
207 [ConfigureNotify] = configurenotify,
208 [DestroyNotify] = destroynotify,
209 [EnterNotify] = enternotify,
210 [LeaveNotify] = leavenotify,
211 [Expose] = expose,
212 [KeyPress] = keypress,
213 [MappingNotify] = mappingnotify,
214 [MapRequest] = maprequest,
215 [PropertyNotify] = propertynotify,
216 [UnmapNotify] = unmapnotify
217 };
218 Atom wmatom[WMLast], netatom[NetLast];
219 Bool otherwm, readin;
220 Bool running = True;
221 Bool *seltags;
222 Bool selscreen = True;
223 Client *clients = NULL;
224 Client *sel = NULL;
225 Client *stack = NULL;
226 Cursor cursor[CurLast];
227 Display *dpy;
228 DC dc = {0};
229 Window barwin, root;
230 Regs *regs = NULL;
231
232 /* configuration, allows nested code to access above variables */
233 #include "config.h"
234
235 /* functions*/
236 void
237 applyrules(Client *c) {
238 static char buf[512];
239 unsigned int i, j;
240 regmatch_t tmp;
241 Bool matched = False;
242 XClassHint ch = { 0 };
243
244 /* rule matching */
245 XGetClassHint(dpy, c->win, &ch);
246 snprintf(buf, sizeof buf, "%s:%s:%s",
247 ch.res_class ? ch.res_class : "",
248 ch.res_name ? ch.res_name : "", c->name);
249 for(i = 0; i < nrules; i++)
250 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
251 c->isfloating = rules[i].isfloating;
252 for(j = 0; regs[i].tagregex && j < ntags; j++) {
253 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
254 matched = True;
255 c->tags[j] = True;
256 }
257 }
258 }
259 if(ch.res_class)
260 XFree(ch.res_class);
261 if(ch.res_name)
262 XFree(ch.res_name);
263 if(!matched)
264 for(i = 0; i < ntags; i++)
265 c->tags[i] = seltags[i];
266 }
267
268 void
269 arrange(void) {
270 Client *c;
271
272 for(c = clients; c; c = c->next)
273 if(isvisible(c))
274 unban(c);
275 else
276 ban(c);
277 layouts[ltidx].arrange();
278 focus(NULL);
279 restack();
280 }
281
282 void
283 attach(Client *c) {
284 if(clients)
285 clients->prev = c;
286 c->next = clients;
287 clients = c;
288 }
289
290 void
291 attachstack(Client *c) {
292 c->snext = stack;
293 stack = c;
294 }
295
296 void
297 ban(Client *c) {
298 if(c->isbanned)
299 return;
300 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
301 c->isbanned = True;
302 }
303
304 void
305 buttonpress(XEvent *e) {
306 unsigned int i, x;
307 Client *c;
308 XButtonPressedEvent *ev = &e->xbutton;
309
310 if(barwin == ev->window) {
311 x = 0;
312 for(i = 0; i < ntags; i++) {
313 x += textw(tags[i]);
314 if(ev->x < x) {
315 if(ev->button == Button1) {
316 if(ev->state & MODKEY)
317 tag(tags[i]);
318 else
319 view(tags[i]);
320 }
321 else if(ev->button == Button3) {
322 if(ev->state & MODKEY)
323 toggletag(tags[i]);
324 else
325 toggleview(tags[i]);
326 }
327 return;
328 }
329 }
330 if((ev->x < x + blw) && ev->button == Button1)
331 setlayout(NULL);
332 }
333 else if((c = getclient(ev->window))) {
334 focus(c);
335 if(CLEANMASK(ev->state) != MODKEY)
336 return;
337 if(ev->button == Button1) {
338 if(isarrange(floating) || c->isfloating)
339 restack();
340 else
341 togglefloating(NULL);
342 movemouse(c);
343 }
344 else if(ev->button == Button2) {
345 if(ISTILE && !c->isfixed && c->isfloating)
346 togglefloating(NULL);
347 else
348 zoom(NULL);
349 }
350 else if(ev->button == Button3 && !c->isfixed) {
351 if(isarrange(floating) || c->isfloating)
352 restack();
353 else
354 togglefloating(NULL);
355 resizemouse(c);
356 }
357 }
358 }
359
360 void
361 checkotherwm(void) {
362 otherwm = False;
363 XSetErrorHandler(xerrorstart);
364
365 /* this causes an error if some other window manager is running */
366 XSelectInput(dpy, root, SubstructureRedirectMask);
367 XSync(dpy, False);
368 if(otherwm)
369 eprint("dwm: another window manager is already running\n");
370 XSync(dpy, False);
371 XSetErrorHandler(NULL);
372 xerrorxlib = XSetErrorHandler(xerror);
373 XSync(dpy, False);
374 }
375
376 void
377 cleanup(void) {
378 close(STDIN_FILENO);
379 while(stack) {
380 unban(stack);
381 unmanage(stack);
382 }
383 if(dc.font.set)
384 XFreeFontSet(dpy, dc.font.set);
385 else
386 XFreeFont(dpy, dc.font.xfont);
387 XUngrabKey(dpy, AnyKey, AnyModifier, root);
388 XFreePixmap(dpy, dc.drawable);
389 XFreeGC(dpy, dc.gc);
390 XDestroyWindow(dpy, barwin);
391 XFreeCursor(dpy, cursor[CurNormal]);
392 XFreeCursor(dpy, cursor[CurResize]);
393 XFreeCursor(dpy, cursor[CurMove]);
394 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
395 XSync(dpy, False);
396 free(seltags);
397 }
398
399 void
400 compileregs(void) {
401 unsigned int i;
402 regex_t *reg;
403
404 if(regs)
405 return;
406 nrules = sizeof rules / sizeof rules[0];
407 regs = emallocz(nrules * sizeof(Regs));
408 for(i = 0; i < nrules; i++) {
409 if(rules[i].prop) {
410 reg = emallocz(sizeof(regex_t));
411 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
412 free(reg);
413 else
414 regs[i].propregex = reg;
415 }
416 if(rules[i].tags) {
417 reg = emallocz(sizeof(regex_t));
418 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
419 free(reg);
420 else
421 regs[i].tagregex = reg;
422 }
423 }
424 }
425
426 void
427 configure(Client *c) {
428 XConfigureEvent ce;
429
430 ce.type = ConfigureNotify;
431 ce.display = dpy;
432 ce.event = c->win;
433 ce.window = c->win;
434 ce.x = c->x;
435 ce.y = c->y;
436 ce.width = c->w;
437 ce.height = c->h;
438 ce.border_width = c->border;
439 ce.above = None;
440 ce.override_redirect = False;
441 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
442 }
443
444 void
445 configurenotify(XEvent *e) {
446 XConfigureEvent *ev = &e->xconfigure;
447
448 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
449 sw = ev->width;
450 sh = ev->height;
451 XFreePixmap(dpy, dc.drawable);
452 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
453 XResizeWindow(dpy, barwin, sw, bh);
454 updatebarpos();
455 arrange();
456 }
457 }
458
459 void
460 configurerequest(XEvent *e) {
461 Client *c;
462 XConfigureRequestEvent *ev = &e->xconfigurerequest;
463 XWindowChanges wc;
464
465 if((c = getclient(ev->window))) {
466 c->ismax = False;
467 if(ev->value_mask & CWBorderWidth)
468 c->border = ev->border_width;
469 if(c->isfixed || c->isfloating || isarrange(floating)) {
470 if(ev->value_mask & CWX)
471 c->x = ev->x;
472 if(ev->value_mask & CWY)
473 c->y = ev->y;
474 if(ev->value_mask & CWWidth)
475 c->w = ev->width;
476 if(ev->value_mask & CWHeight)
477 c->h = ev->height;
478 if((c->x + c->w) > sw && c->isfloating)
479 c->x = sw / 2 - c->w / 2; /* center in x direction */
480 if((c->y + c->h) > sh && c->isfloating)
481 c->y = sh / 2 - c->h / 2; /* center in y direction */
482 if((ev->value_mask & (CWX | CWY))
483 && !(ev->value_mask & (CWWidth | CWHeight)))
484 configure(c);
485 if(isvisible(c))
486 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
487 }
488 else
489 configure(c);
490 }
491 else {
492 wc.x = ev->x;
493 wc.y = ev->y;
494 wc.width = ev->width;
495 wc.height = ev->height;
496 wc.border_width = ev->border_width;
497 wc.sibling = ev->above;
498 wc.stack_mode = ev->detail;
499 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
500 }
501 XSync(dpy, False);
502 }
503
504 void
505 destroynotify(XEvent *e) {
506 Client *c;
507 XDestroyWindowEvent *ev = &e->xdestroywindow;
508
509 if((c = getclient(ev->window)))
510 unmanage(c);
511 }
512
513 void
514 detach(Client *c) {
515 if(c->prev)
516 c->prev->next = c->next;
517 if(c->next)
518 c->next->prev = c->prev;
519 if(c == clients)
520 clients = c->next;
521 c->next = c->prev = NULL;
522 }
523
524 void
525 detachstack(Client *c) {
526 Client **tc;
527
528 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
529 *tc = c->snext;
530 }
531
532 void
533 drawbar(void) {
534 int i, x;
535
536 dc.x = dc.y = 0;
537 for(i = 0; i < ntags; i++) {
538 dc.w = textw(tags[i]);
539 if(seltags[i]) {
540 drawtext(tags[i], dc.sel);
541 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
542 }
543 else {
544 drawtext(tags[i], dc.norm);
545 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
546 }
547 dc.x += dc.w;
548 }
549 dc.w = blw;
550 drawtext(layouts[ltidx].symbol, dc.norm);
551 x = dc.x + dc.w;
552 dc.w = textw(stext);
553 dc.x = sw - dc.w;
554 if(dc.x < x) {
555 dc.x = x;
556 dc.w = sw - x;
557 }
558 drawtext(stext, dc.norm);
559 if((dc.w = dc.x - x) > bh) {
560 dc.x = x;
561 if(sel) {
562 drawtext(sel->name, dc.sel);
563 drawsquare(sel->ismax, sel->isfloating, dc.sel);
564 }
565 else
566 drawtext(NULL, dc.norm);
567 }
568 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
569 XSync(dpy, False);
570 }
571
572 void
573 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
574 int x;
575 XGCValues gcv;
576 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
577
578 gcv.foreground = col[ColFG];
579 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
580 x = (dc.font.ascent + dc.font.descent + 2) / 4;
581 r.x = dc.x + 1;
582 r.y = dc.y + 1;
583 if(filled) {
584 r.width = r.height = x + 1;
585 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
586 }
587 else if(empty) {
588 r.width = r.height = x;
589 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
590 }
591 }
592
593 void
594 drawtext(const char *text, unsigned long col[ColLast]) {
595 int x, y, w, h;
596 static char buf[256];
597 unsigned int len, olen;
598 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
599
600 XSetForeground(dpy, dc.gc, col[ColBG]);
601 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
602 if(!text)
603 return;
604 w = 0;
605 olen = len = strlen(text);
606 if(len >= sizeof buf)
607 len = sizeof buf - 1;
608 memcpy(buf, text, len);
609 buf[len] = 0;
610 h = dc.font.ascent + dc.font.descent;
611 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
612 x = dc.x + (h / 2);
613 /* shorten text if necessary */
614 while(len && (w = textnw(buf, len)) > dc.w - h)
615 buf[--len] = 0;
616 if(len < olen) {
617 if(len > 1)
618 buf[len - 1] = '.';
619 if(len > 2)
620 buf[len - 2] = '.';
621 if(len > 3)
622 buf[len - 3] = '.';
623 }
624 if(w > dc.w)
625 return; /* too long */
626 XSetForeground(dpy, dc.gc, col[ColFG]);
627 if(dc.font.set)
628 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
629 else
630 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
631 }
632
633 void *
634 emallocz(unsigned int size) {
635 void *res = calloc(1, size);
636
637 if(!res)
638 eprint("fatal: could not malloc() %u bytes\n", size);
639 return res;
640 }
641
642 void
643 enternotify(XEvent *e) {
644 Client *c;
645 XCrossingEvent *ev = &e->xcrossing;
646
647 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
648 return;
649 if((c = getclient(ev->window))) {
650 focus(c);
651 if(ISTILE && !c->isfloating)
652 restack();
653 }
654 else if(ev->window == root) {
655 selscreen = True;
656 focus(NULL);
657 }
658 }
659
660 void
661 eprint(const char *errstr, ...) {
662 va_list ap;
663
664 va_start(ap, errstr);
665 vfprintf(stderr, errstr, ap);
666 va_end(ap);
667 exit(EXIT_FAILURE);
668 }
669
670 void
671 expose(XEvent *e) {
672 XExposeEvent *ev = &e->xexpose;
673
674 if(ev->count == 0) {
675 if(barwin == ev->window)
676 drawbar();
677 }
678 }
679
680 void
681 floating(void) { /* default floating layout */
682 Client *c;
683
684 for(c = clients; c; c = c->next)
685 if(isvisible(c))
686 resize(c, c->x, c->y, c->w, c->h, True);
687 }
688
689 void
690 focus(Client *c) {
691 if((!c && selscreen) || (c && !isvisible(c)))
692 for(c = stack; c && !isvisible(c); c = c->snext);
693 if(sel && sel != c) {
694 grabbuttons(sel, False);
695 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
696 }
697 if(c) {
698 detachstack(c);
699 attachstack(c);
700 grabbuttons(c, True);
701 }
702 sel = c;
703 drawbar();
704 if(!selscreen)
705 return;
706 if(c) {
707 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
708 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
709 }
710 else
711 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
712 }
713
714 void
715 focusnext(const char *arg) {
716 Client *c;
717
718 if(!sel)
719 return;
720 for(c = sel->next; c && !isvisible(c); c = c->next);
721 if(!c)
722 for(c = clients; c && !isvisible(c); c = c->next);
723 if(c) {
724 focus(c);
725 restack();
726 }
727 }
728
729 void
730 focusprev(const char *arg) {
731 Client *c;
732
733 if(!sel)
734 return;
735 for(c = sel->prev; c && !isvisible(c); c = c->prev);
736 if(!c) {
737 for(c = clients; c && c->next; c = c->next);
738 for(; c && !isvisible(c); c = c->prev);
739 }
740 if(c) {
741 focus(c);
742 restack();
743 }
744 }
745
746 Client *
747 getclient(Window w) {
748 Client *c;
749
750 for(c = clients; c && c->win != w; c = c->next);
751 return c;
752 }
753
754 unsigned long
755 getcolor(const char *colstr) {
756 Colormap cmap = DefaultColormap(dpy, screen);
757 XColor color;
758
759 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
760 eprint("error, cannot allocate color '%s'\n", colstr);
761 return color.pixel;
762 }
763
764 long
765 getstate(Window w) {
766 int format, status;
767 long result = -1;
768 unsigned char *p = NULL;
769 unsigned long n, extra;
770 Atom real;
771
772 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
773 &real, &format, &n, &extra, (unsigned char **)&p);
774 if(status != Success)
775 return -1;
776 if(n != 0)
777 result = *p;
778 XFree(p);
779 return result;
780 }
781
782 Bool
783 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
784 char **list = NULL;
785 int n;
786 XTextProperty name;
787
788 if(!text || size == 0)
789 return False;
790 text[0] = '\0';
791 XGetTextProperty(dpy, w, &name, atom);
792 if(!name.nitems)
793 return False;
794 if(name.encoding == XA_STRING)
795 strncpy(text, (char *)name.value, size - 1);
796 else {
797 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
798 && n > 0 && *list)
799 {
800 strncpy(text, *list, size - 1);
801 XFreeStringList(list);
802 }
803 }
804 text[size - 1] = '\0';
805 XFree(name.value);
806 return True;
807 }
808
809 void
810 grabbuttons(Client *c, Bool focused) {
811 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
812
813 if(focused) {
814 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
815 GrabModeAsync, GrabModeSync, None, None);
816 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
817 GrabModeAsync, GrabModeSync, None, None);
818 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
819 GrabModeAsync, GrabModeSync, None, None);
820 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
821 GrabModeAsync, GrabModeSync, None, None);
822
823 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
824 GrabModeAsync, GrabModeSync, None, None);
825 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
826 GrabModeAsync, GrabModeSync, None, None);
827 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
828 GrabModeAsync, GrabModeSync, None, None);
829 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
830 GrabModeAsync, GrabModeSync, None, None);
831
832 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
833 GrabModeAsync, GrabModeSync, None, None);
834 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
835 GrabModeAsync, GrabModeSync, None, None);
836 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
837 GrabModeAsync, GrabModeSync, None, None);
838 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
839 GrabModeAsync, GrabModeSync, None, None);
840 }
841 else
842 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
843 GrabModeAsync, GrabModeSync, None, None);
844 }
845
846 unsigned int
847 idxoftag(const char *tag) {
848 unsigned int i;
849
850 for(i = 0; i < ntags; i++)
851 if(tags[i] == tag)
852 return i;
853 return 0;
854 }
855
856 void
857 initfont(const char *fontstr) {
858 char *def, **missing;
859 int i, n;
860
861 missing = NULL;
862 if(dc.font.set)
863 XFreeFontSet(dpy, dc.font.set);
864 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
865 if(missing) {
866 while(n--)
867 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
868 XFreeStringList(missing);
869 }
870 if(dc.font.set) {
871 XFontSetExtents *font_extents;
872 XFontStruct **xfonts;
873 char **font_names;
874 dc.font.ascent = dc.font.descent = 0;
875 font_extents = XExtentsOfFontSet(dc.font.set);
876 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
877 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
878 if(dc.font.ascent < (*xfonts)->ascent)
879 dc.font.ascent = (*xfonts)->ascent;
880 if(dc.font.descent < (*xfonts)->descent)
881 dc.font.descent = (*xfonts)->descent;
882 xfonts++;
883 }
884 }
885 else {
886 if(dc.font.xfont)
887 XFreeFont(dpy, dc.font.xfont);
888 dc.font.xfont = NULL;
889 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
890 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
891 eprint("error, cannot load font: '%s'\n", fontstr);
892 dc.font.ascent = dc.font.xfont->ascent;
893 dc.font.descent = dc.font.xfont->descent;
894 }
895 dc.font.height = dc.font.ascent + dc.font.descent;
896 }
897
898 Bool
899 isarrange(void (*func)())
900 {
901 return func == layouts[ltidx].arrange;
902 }
903
904 Bool
905 isoccupied(unsigned int t) {
906 Client *c;
907
908 for(c = clients; c; c = c->next)
909 if(c->tags[t])
910 return True;
911 return False;
912 }
913
914 Bool
915 isprotodel(Client *c) {
916 int i, n;
917 Atom *protocols;
918 Bool ret = False;
919
920 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
921 for(i = 0; !ret && i < n; i++)
922 if(protocols[i] == wmatom[WMDelete])
923 ret = True;
924 XFree(protocols);
925 }
926 return ret;
927 }
928
929 Bool
930 isvisible(Client *c) {
931 unsigned int i;
932
933 for(i = 0; i < ntags; i++)
934 if(c->tags[i] && seltags[i])
935 return True;
936 return False;
937 }
938
939 void
940 keypress(XEvent *e) {
941 KEYS
942 unsigned int len = sizeof keys / sizeof keys[0];
943 unsigned int i;
944 KeyCode code;
945 KeySym keysym;
946 XKeyEvent *ev;
947
948 if(!e) { /* grabkeys */
949 XUngrabKey(dpy, AnyKey, AnyModifier, root);
950 for(i = 0; i < len; i++) {
951 code = XKeysymToKeycode(dpy, keys[i].keysym);
952 XGrabKey(dpy, code, keys[i].mod, root, True,
953 GrabModeAsync, GrabModeAsync);
954 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
955 GrabModeAsync, GrabModeAsync);
956 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
957 GrabModeAsync, GrabModeAsync);
958 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
959 GrabModeAsync, GrabModeAsync);
960 }
961 return;
962 }
963 ev = &e->xkey;
964 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
965 for(i = 0; i < len; i++)
966 if(keysym == keys[i].keysym
967 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
968 {
969 if(keys[i].func)
970 keys[i].func(keys[i].arg);
971 }
972 }
973
974 void
975 killclient(const char *arg) {
976 XEvent ev;
977
978 if(!sel)
979 return;
980 if(isprotodel(sel)) {
981 ev.type = ClientMessage;
982 ev.xclient.window = sel->win;
983 ev.xclient.message_type = wmatom[WMProtocols];
984 ev.xclient.format = 32;
985 ev.xclient.data.l[0] = wmatom[WMDelete];
986 ev.xclient.data.l[1] = CurrentTime;
987 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
988 }
989 else
990 XKillClient(dpy, sel->win);
991 }
992
993 void
994 leavenotify(XEvent *e) {
995 XCrossingEvent *ev = &e->xcrossing;
996
997 if((ev->window == root) && !ev->same_screen) {
998 selscreen = False;
999 focus(NULL);
1000 }
1001 }
1002
1003 void
1004 manage(Window w, XWindowAttributes *wa) {
1005 unsigned int i;
1006 Client *c, *t = NULL;
1007 Window trans;
1008 Status rettrans;
1009 XWindowChanges wc;
1010
1011 c = emallocz(sizeof(Client));
1012 c->tags = emallocz(ntags * sizeof(Bool));
1013 c->win = w;
1014 c->x = wa->x;
1015 c->y = wa->y;
1016 c->w = wa->width;
1017 c->h = wa->height;
1018 c->oldborder = wa->border_width;
1019 if(c->w == sw && c->h == sh) {
1020 c->x = sx;
1021 c->y = sy;
1022 c->border = wa->border_width;
1023 }
1024 else {
1025 if(c->x + c->w + 2 * c->border > wax + waw)
1026 c->x = wax + waw - c->w - 2 * c->border;
1027 if(c->y + c->h + 2 * c->border > way + wah)
1028 c->y = way + wah - c->h - 2 * c->border;
1029 if(c->x < wax)
1030 c->x = wax;
1031 if(c->y < way)
1032 c->y = way;
1033 c->border = BORDERPX;
1034 }
1035 wc.border_width = c->border;
1036 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1037 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1038 configure(c); /* propagates border_width, if size doesn't change */
1039 updatesizehints(c);
1040 XSelectInput(dpy, w,
1041 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
1042 grabbuttons(c, False);
1043 updatetitle(c);
1044 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1045 for(t = clients; t && t->win != trans; t = t->next);
1046 if(t)
1047 for(i = 0; i < ntags; i++)
1048 c->tags[i] = t->tags[i];
1049 applyrules(c);
1050 if(!c->isfloating)
1051 c->isfloating = (rettrans == Success) || c->isfixed;
1052 attach(c);
1053 attachstack(c);
1054 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1055 ban(c);
1056 XMapWindow(dpy, c->win);
1057 setclientstate(c, NormalState);
1058 arrange();
1059 }
1060
1061 void
1062 mappingnotify(XEvent *e) {
1063 XMappingEvent *ev = &e->xmapping;
1064
1065 XRefreshKeyboardMapping(ev);
1066 if(ev->request == MappingKeyboard)
1067 keypress(NULL);
1068 }
1069
1070 void
1071 maprequest(XEvent *e) {
1072 static XWindowAttributes wa;
1073 XMapRequestEvent *ev = &e->xmaprequest;
1074
1075 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1076 return;
1077 if(wa.override_redirect)
1078 return;
1079 if(!getclient(ev->window))
1080 manage(ev->window, &wa);
1081 }
1082
1083 void
1084 movemouse(Client *c) {
1085 int x1, y1, ocx, ocy, di, nx, ny;
1086 unsigned int dui;
1087 Window dummy;
1088 XEvent ev;
1089
1090 ocx = nx = c->x;
1091 ocy = ny = c->y;
1092 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1093 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1094 return;
1095 c->ismax = False;
1096 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1097 for(;;) {
1098 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1099 switch (ev.type) {
1100 case ButtonRelease:
1101 XUngrabPointer(dpy, CurrentTime);
1102 return;
1103 case ConfigureRequest:
1104 case Expose:
1105 case MapRequest:
1106 handler[ev.type](&ev);
1107 break;
1108 case MotionNotify:
1109 XSync(dpy, False);
1110 nx = ocx + (ev.xmotion.x - x1);
1111 ny = ocy + (ev.xmotion.y - y1);
1112 if(abs(wax + nx) < SNAP)
1113 nx = wax;
1114 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1115 nx = wax + waw - c->w - 2 * c->border;
1116 if(abs(way - ny) < SNAP)
1117 ny = way;
1118 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1119 ny = way + wah - c->h - 2 * c->border;
1120 resize(c, nx, ny, c->w, c->h, False);
1121 break;
1122 }
1123 }
1124 }
1125
1126 Client *
1127 nexttiled(Client *c) {
1128 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1129 return c;
1130 }
1131
1132 void
1133 propertynotify(XEvent *e) {
1134 Client *c;
1135 Window trans;
1136 XPropertyEvent *ev = &e->xproperty;
1137
1138 if(ev->state == PropertyDelete)
1139 return; /* ignore */
1140 if((c = getclient(ev->window))) {
1141 switch (ev->atom) {
1142 default: break;
1143 case XA_WM_TRANSIENT_FOR:
1144 XGetTransientForHint(dpy, c->win, &trans);
1145 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1146 arrange();
1147 break;
1148 case XA_WM_NORMAL_HINTS:
1149 updatesizehints(c);
1150 break;
1151 }
1152 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1153 updatetitle(c);
1154 if(c == sel)
1155 drawbar();
1156 }
1157 }
1158 }
1159
1160 void
1161 quit(const char *arg) {
1162 readin = running = False;
1163 }
1164
1165 void
1166 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1167 double dx, dy, max, min, ratio;
1168 XWindowChanges wc;
1169
1170 if(sizehints) {
1171 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
1172 dx = (double)(w - c->basew);
1173 dy = (double)(h - c->baseh);
1174 min = (double)(c->minax) / (double)(c->minay);
1175 max = (double)(c->maxax) / (double)(c->maxay);
1176 ratio = dx / dy;
1177 if(max > 0 && min > 0 && ratio > 0) {
1178 if(ratio < min) {
1179 dy = (dx * min + dy) / (min * min + 1);
1180 dx = dy * min;
1181 w = (int)dx + c->basew;
1182 h = (int)dy + c->baseh;
1183 }
1184 else if(ratio > max) {
1185 dy = (dx * min + dy) / (max * max + 1);
1186 dx = dy * min;
1187 w = (int)dx + c->basew;
1188 h = (int)dy + c->baseh;
1189 }
1190 }
1191 }
1192 if(c->minw && w < c->minw)
1193 w = c->minw;
1194 if(c->minh && h < c->minh)
1195 h = c->minh;
1196 if(c->maxw && w > c->maxw)
1197 w = c->maxw;
1198 if(c->maxh && h > c->maxh)
1199 h = c->maxh;
1200 if(c->incw)
1201 w -= (w - c->basew) % c->incw;
1202 if(c->inch)
1203 h -= (h - c->baseh) % c->inch;
1204 }
1205 if(w <= 0 || h <= 0)
1206 return;
1207 /* offscreen appearance fixes */
1208 if(x > sw)
1209 x = sw - w - 2 * c->border;
1210 if(y > sh)
1211 y = sh - h - 2 * c->border;
1212 if(x + w + 2 * c->border < sx)
1213 x = sx;
1214 if(y + h + 2 * c->border < sy)
1215 y = sy;
1216 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1217 c->x = wc.x = x;
1218 c->y = wc.y = y;
1219 c->w = wc.width = w;
1220 c->h = wc.height = h;
1221 wc.border_width = c->border;
1222 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1223 configure(c);
1224 XSync(dpy, False);
1225 }
1226 }
1227
1228 void
1229 resizemouse(Client *c) {
1230 int ocx, ocy;
1231 int nw, nh;
1232 XEvent ev;
1233
1234 ocx = c->x;
1235 ocy = c->y;
1236 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1237 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1238 return;
1239 c->ismax = False;
1240 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1241 for(;;) {
1242 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1243 switch(ev.type) {
1244 case ButtonRelease:
1245 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1246 c->w + c->border - 1, c->h + c->border - 1);
1247 XUngrabPointer(dpy, CurrentTime);
1248 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1249 return;
1250 case ConfigureRequest:
1251 case Expose:
1252 case MapRequest:
1253 handler[ev.type](&ev);
1254 break;
1255 case MotionNotify:
1256 XSync(dpy, False);
1257 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1258 nw = 1;
1259 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1260 nh = 1;
1261 resize(c, c->x, c->y, nw, nh, True);
1262 break;
1263 }
1264 }
1265 }
1266
1267 void
1268 restack(void) {
1269 Client *c;
1270 XEvent ev;
1271 XWindowChanges wc;
1272
1273 drawbar();
1274 if(!sel)
1275 return;
1276 if(sel->isfloating || isarrange(floating))
1277 XRaiseWindow(dpy, sel->win);
1278 if(!isarrange(floating)) {
1279 wc.stack_mode = Below;
1280 wc.sibling = barwin;
1281 if(!sel->isfloating) {
1282 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1283 wc.sibling = sel->win;
1284 }
1285 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1286 if(c == sel)
1287 continue;
1288 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1289 wc.sibling = c->win;
1290 }
1291 }
1292 XSync(dpy, False);
1293 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1294 }
1295
1296 void
1297 run(void) {
1298 char *p;
1299 int r, xfd;
1300 fd_set rd;
1301 XEvent ev;
1302
1303 /* main event loop, also reads status text from stdin */
1304 XSync(dpy, False);
1305 xfd = ConnectionNumber(dpy);
1306 readin = True;
1307 while(running) {
1308 FD_ZERO(&rd);
1309 if(readin)
1310 FD_SET(STDIN_FILENO, &rd);
1311 FD_SET(xfd, &rd);
1312 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1313 if(errno == EINTR)
1314 continue;
1315 eprint("select failed\n");
1316 }
1317 if(FD_ISSET(STDIN_FILENO, &rd)) {
1318 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1319 case -1:
1320 strncpy(stext, strerror(errno), sizeof stext - 1);
1321 stext[sizeof stext - 1] = '\0';
1322 readin = False;
1323 break;
1324 case 0:
1325 strncpy(stext, "EOF", 4);
1326 readin = False;
1327 break;
1328 default:
1329 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1330 for(; p >= stext && *p != '\n'; --p);
1331 if(p > stext)
1332 strncpy(stext, p + 1, sizeof stext);
1333 }
1334 drawbar();
1335 }
1336 while(XPending(dpy)) {
1337 XNextEvent(dpy, &ev);
1338 if(handler[ev.type])
1339 (handler[ev.type])(&ev); /* call handler */
1340 }
1341 }
1342 }
1343
1344 void
1345 scan(void) {
1346 unsigned int i, num;
1347 Window *wins, d1, d2;
1348 XWindowAttributes wa;
1349
1350 wins = NULL;
1351 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1352 for(i = 0; i < num; i++) {
1353 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1354 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1355 continue;
1356 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1357 manage(wins[i], &wa);
1358 }
1359 for(i = 0; i < num; i++) { /* now the transients */
1360 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1361 continue;
1362 if(XGetTransientForHint(dpy, wins[i], &d1)
1363 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1364 manage(wins[i], &wa);
1365 }
1366 }
1367 if(wins)
1368 XFree(wins);
1369 }
1370
1371 void
1372 setclientstate(Client *c, long state) {
1373 long data[] = {state, None};
1374
1375 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1376 PropModeReplace, (unsigned char *)data, 2);
1377 }
1378
1379 void
1380 setlayout(const char *arg) {
1381 unsigned int i;
1382
1383 if(!arg) {
1384 if(++ltidx == nlayouts)
1385 ltidx = 0;;
1386 }
1387 else {
1388 for(i = 0; i < nlayouts; i++)
1389 if(!strcmp(arg, layouts[i].symbol))
1390 break;
1391 if(i == nlayouts)
1392 return;
1393 ltidx = i;
1394 }
1395 if(sel)
1396 arrange();
1397 else
1398 drawbar();
1399 }
1400
1401 void
1402 setmwfact(const char *arg) {
1403 double delta;
1404
1405 if(!ISTILE)
1406 return;
1407 /* arg handling, manipulate mwfact */
1408 if(arg == NULL)
1409 mwfact = MWFACT;
1410 else if(1 == sscanf(arg, "%lf", &delta)) {
1411 if(arg[0] == '+' || arg[0] == '-')
1412 mwfact += delta;
1413 else
1414 mwfact = delta;
1415 if(mwfact < 0.1)
1416 mwfact = 0.1;
1417 else if(mwfact > 0.9)
1418 mwfact = 0.9;
1419 }
1420 arrange();
1421 }
1422
1423 void
1424 setup(void) {
1425 int d;
1426 unsigned int i, j, mask;
1427 Window w;
1428 XModifierKeymap *modmap;
1429 XSetWindowAttributes wa;
1430
1431 /* init atoms */
1432 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1433 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1434 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1435 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1436 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1437 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1438 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1439 PropModeReplace, (unsigned char *) netatom, NetLast);
1440
1441 /* init cursors */
1442 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1443 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1444 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1445
1446 /* init geometry */
1447 sx = sy = 0;
1448 sw = DisplayWidth(dpy, screen);
1449 sh = DisplayHeight(dpy, screen);
1450
1451 /* init modifier map */
1452 modmap = XGetModifierMapping(dpy);
1453 for(i = 0; i < 8; i++)
1454 for(j = 0; j < modmap->max_keypermod; j++) {
1455 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1456 == XKeysymToKeycode(dpy, XK_Num_Lock))
1457 numlockmask = (1 << i);
1458 }
1459 XFreeModifiermap(modmap);
1460
1461 /* select for events */
1462 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1463 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1464 wa.cursor = cursor[CurNormal];
1465 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1466 XSelectInput(dpy, root, wa.event_mask);
1467
1468 /* grab keys */
1469 keypress(NULL);
1470
1471 /* init tags */
1472 compileregs();
1473 for(ntags = 0; tags[ntags]; ntags++);
1474 seltags = emallocz(sizeof(Bool) * ntags);
1475 seltags[0] = True;
1476
1477 /* init appearance */
1478 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1479 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1480 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1481 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1482 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1483 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1484 initfont(FONT);
1485 dc.h = bh = dc.font.height + 2;
1486
1487 /* init layouts */
1488 mwfact = MWFACT;
1489 nlayouts = sizeof layouts / sizeof layouts[0];
1490 for(blw = i = 0; i < nlayouts; i++) {
1491 j = textw(layouts[i].symbol);
1492 if(j > blw)
1493 blw = j;
1494 }
1495
1496 /* init bar */
1497 bpos = BARPOS;
1498 wa.override_redirect = 1;
1499 wa.background_pixmap = ParentRelative;
1500 wa.event_mask = ButtonPressMask | ExposureMask;
1501 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1502 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1503 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1504 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1505 updatebarpos();
1506 XMapRaised(dpy, barwin);
1507 strcpy(stext, "dwm-"VERSION);
1508 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1509 dc.gc = XCreateGC(dpy, root, 0, 0);
1510 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1511 if(!dc.font.set)
1512 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1513
1514 /* multihead support */
1515 selscreen = XQueryPointer(dpy, root, &w, &w, &d, &d, &d, &d, &mask);
1516 }
1517
1518 void
1519 spawn(const char *arg) {
1520 static char *shell = NULL;
1521
1522 if(!shell && !(shell = getenv("SHELL")))
1523 shell = "/bin/sh";
1524 if(!arg)
1525 return;
1526 /* The double-fork construct avoids zombie processes and keeps the code
1527 * clean from stupid signal handlers. */
1528 if(fork() == 0) {
1529 if(fork() == 0) {
1530 if(dpy)
1531 close(ConnectionNumber(dpy));
1532 setsid();
1533 execl(shell, shell, "-c", arg, (char *)NULL);
1534 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1535 perror(" failed");
1536 }
1537 exit(0);
1538 }
1539 wait(0);
1540 }
1541
1542 void
1543 tag(const char *arg) {
1544 unsigned int i;
1545
1546 if(!sel)
1547 return;
1548 for(i = 0; i < ntags; i++)
1549 sel->tags[i] = arg == NULL;
1550 i = idxoftag(arg);
1551 if(i >= 0 && i < ntags)
1552 sel->tags[i] = True;
1553 arrange();
1554 }
1555
1556 unsigned int
1557 textnw(const char *text, unsigned int len) {
1558 XRectangle r;
1559
1560 if(dc.font.set) {
1561 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1562 return r.width;
1563 }
1564 return XTextWidth(dc.font.xfont, text, len);
1565 }
1566
1567 unsigned int
1568 textw(const char *text) {
1569 return textnw(text, strlen(text)) + dc.font.height;
1570 }
1571
1572 void
1573 tile(void) {
1574 unsigned int i, n, nx, ny, nw, nh, mw, th;
1575 Client *c, *mc;
1576
1577 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1578 n++;
1579
1580 /* window geoms */
1581 mw = (n == 1) ? waw : mwfact * waw;
1582 th = (n > 1) ? wah / (n - 1) : 0;
1583 if(n > 1 && th < bh)
1584 th = wah;
1585
1586 nx = wax;
1587 ny = way;
1588 nw = 0; /* gcc stupidity requires this */
1589 for(i = 0, c = mc = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1590 c->ismax = False;
1591 if(i == 0) { /* master */
1592 nw = mw - 2 * c->border;
1593 nh = wah - 2 * c->border;
1594 }
1595 else { /* tile window */
1596 if(i == 1) {
1597 ny = way;
1598 nx += mc->w + mc->border;
1599 nw = waw - nx - 2 * c->border;
1600 }
1601 if(i + 1 == n) /* remainder */
1602 nh = (way + wah) - ny - 2 * c->border;
1603 else
1604 nh = th - 2 * c->border;
1605 }
1606 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1607 if(n > 1 && th != wah)
1608 ny = c->y + c->h + c->border;
1609 }
1610 }
1611
1612 void
1613 togglebar(const char *arg) {
1614 if(bpos == BarOff)
1615 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1616 else
1617 bpos = BarOff;
1618 updatebarpos();
1619 arrange();
1620 }
1621
1622 void
1623 togglefloating(const char *arg) {
1624 if(!sel)
1625 return;
1626 sel->isfloating = !sel->isfloating;
1627 if(sel->isfloating)
1628 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1629 arrange();
1630 }
1631
1632 void
1633 togglemax(const char *arg) {
1634 XEvent ev;
1635
1636 if(!sel || sel->isfixed)
1637 return;
1638 if((sel->ismax = !sel->ismax)) {
1639 if(isarrange(floating) || sel->isfloating)
1640 sel->wasfloating = True;
1641 else {
1642 togglefloating(NULL);
1643 sel->wasfloating = False;
1644 }
1645 sel->rx = sel->x;
1646 sel->ry = sel->y;
1647 sel->rw = sel->w;
1648 sel->rh = sel->h;
1649 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1650 }
1651 else {
1652 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1653 if(!sel->wasfloating)
1654 togglefloating(NULL);
1655 }
1656 drawbar();
1657 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1658 }
1659
1660 void
1661 toggletag(const char *arg) {
1662 unsigned int i, j;
1663
1664 if(!sel)
1665 return;
1666 i = idxoftag(arg);
1667 sel->tags[i] = !sel->tags[i];
1668 for(j = 0; j < ntags && !sel->tags[j]; j++);
1669 if(j == ntags)
1670 sel->tags[i] = True;
1671 arrange();
1672 }
1673
1674 void
1675 toggleview(const char *arg) {
1676 unsigned int i, j;
1677
1678 i = idxoftag(arg);
1679 seltags[i] = !seltags[i];
1680 for(j = 0; j < ntags && !seltags[j]; j++);
1681 if(j == ntags)
1682 seltags[i] = True; /* at least one tag must be viewed */
1683 arrange();
1684 }
1685
1686 void
1687 unban(Client *c) {
1688 if(!c->isbanned)
1689 return;
1690 XMoveWindow(dpy, c->win, c->x, c->y);
1691 c->isbanned = False;
1692 }
1693
1694 void
1695 unmanage(Client *c) {
1696 XWindowChanges wc;
1697
1698 wc.border_width = c->oldborder;
1699 /* The server grab construct avoids race conditions. */
1700 XGrabServer(dpy);
1701 XSetErrorHandler(xerrordummy);
1702 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1703 detach(c);
1704 detachstack(c);
1705 if(sel == c)
1706 focus(NULL);
1707 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1708 setclientstate(c, WithdrawnState);
1709 free(c->tags);
1710 free(c);
1711 XSync(dpy, False);
1712 XSetErrorHandler(xerror);
1713 XUngrabServer(dpy);
1714 arrange();
1715 }
1716
1717 void
1718 unmapnotify(XEvent *e) {
1719 Client *c;
1720 XUnmapEvent *ev = &e->xunmap;
1721
1722 if((c = getclient(ev->window)))
1723 unmanage(c);
1724 }
1725
1726 void
1727 updatebarpos(void) {
1728 XEvent ev;
1729
1730 wax = sx;
1731 way = sy;
1732 wah = sh;
1733 waw = sw;
1734 switch(bpos) {
1735 default:
1736 wah -= bh;
1737 way += bh;
1738 XMoveWindow(dpy, barwin, sx, sy);
1739 break;
1740 case BarBot:
1741 wah -= bh;
1742 XMoveWindow(dpy, barwin, sx, sy + wah);
1743 break;
1744 case BarOff:
1745 XMoveWindow(dpy, barwin, sx, sy - bh);
1746 break;
1747 }
1748 XSync(dpy, False);
1749 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1750 }
1751
1752 void
1753 updatesizehints(Client *c) {
1754 long msize;
1755 XSizeHints size;
1756
1757 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1758 size.flags = PSize;
1759 c->flags = size.flags;
1760 if(c->flags & PBaseSize) {
1761 c->basew = size.base_width;
1762 c->baseh = size.base_height;
1763 }
1764 else if(c->flags & PMinSize) {
1765 c->basew = size.min_width;
1766 c->baseh = size.min_height;
1767 }
1768 else
1769 c->basew = c->baseh = 0;
1770 if(c->flags & PResizeInc) {
1771 c->incw = size.width_inc;
1772 c->inch = size.height_inc;
1773 }
1774 else
1775 c->incw = c->inch = 0;
1776 if(c->flags & PMaxSize) {
1777 c->maxw = size.max_width;
1778 c->maxh = size.max_height;
1779 }
1780 else
1781 c->maxw = c->maxh = 0;
1782 if(c->flags & PMinSize) {
1783 c->minw = size.min_width;
1784 c->minh = size.min_height;
1785 }
1786 else if(c->flags & PBaseSize) {
1787 c->minw = size.base_width;
1788 c->minh = size.base_height;
1789 }
1790 else
1791 c->minw = c->minh = 0;
1792 if(c->flags & PAspect) {
1793 c->minax = size.min_aspect.x;
1794 c->maxax = size.max_aspect.x;
1795 c->minay = size.min_aspect.y;
1796 c->maxay = size.max_aspect.y;
1797 }
1798 else
1799 c->minax = c->maxax = c->minay = c->maxay = 0;
1800 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1801 && c->maxw == c->minw && c->maxh == c->minh);
1802 }
1803
1804 void
1805 updatetitle(Client *c) {
1806 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1807 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1808 }
1809
1810 /* There's no way to check accesses to destroyed windows, thus those cases are
1811 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1812 * default error handler, which may call exit. */
1813 int
1814 xerror(Display *dpy, XErrorEvent *ee) {
1815 if(ee->error_code == BadWindow
1816 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1817 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1818 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1819 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1820 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1821 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1822 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1823 return 0;
1824 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1825 ee->request_code, ee->error_code);
1826 return xerrorxlib(dpy, ee); /* may call exit */
1827 }
1828
1829 int
1830 xerrordummy(Display *dsply, XErrorEvent *ee) {
1831 return 0;
1832 }
1833
1834 /* Startup Error handler to check if another window manager
1835 * is already running. */
1836 int
1837 xerrorstart(Display *dsply, XErrorEvent *ee) {
1838 otherwm = True;
1839 return -1;
1840 }
1841
1842 void
1843 view(const char *arg) {
1844 unsigned int i;
1845
1846 for(i = 0; i < ntags; i++)
1847 seltags[i] = arg == NULL;
1848 i = idxoftag(arg);
1849 if(i >= 0 && i < ntags)
1850 seltags[i] = True;
1851 arrange();
1852 }
1853
1854 void
1855 zoom(const char *arg) {
1856 Client *c;
1857
1858 if(!sel || !ISTILE || sel->isfloating)
1859 return;
1860 if((c = sel) == nexttiled(clients))
1861 if(!(c = nexttiled(c->next)))
1862 return;
1863 detach(c);
1864 attach(c);
1865 focus(c);
1866 arrange();
1867 }
1868
1869 int
1870 main(int argc, char *argv[]) {
1871 if(argc == 2 && !strcmp("-v", argv[1]))
1872 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1873 else if(argc != 1)
1874 eprint("usage: dwm [-v]\n");
1875
1876 setlocale(LC_CTYPE, "");
1877 if(!(dpy = XOpenDisplay(0)))
1878 eprint("dwm: cannot open display\n");
1879 screen = DefaultScreen(dpy);
1880 root = RootWindow(dpy, screen);
1881
1882 checkotherwm();
1883 setup();
1884 drawbar();
1885 scan();
1886 run();
1887 cleanup();
1888
1889 XCloseDisplay(dpy);
1890 return 0;
1891 }