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