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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.
21 *
22 * Keys and tagging rules are organized as arrays and defined in config.h.
23 *
24 * To understand everything else, start reading main().
25 */
26 #include <errno.h>
27 #include <locale.h>
28 #include <stdarg.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33 #include <sys/select.h>
34 #include <sys/types.h>
35 #include <sys/wait.h>
36 #include <X11/cursorfont.h>
37 #include <X11/keysym.h>
38 #include <X11/Xatom.h>
39 #include <X11/Xlib.h>
40 #include <X11/Xproto.h>
41 #include <X11/Xutil.h>
42
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define LENGTH(x) (sizeof x / sizeof x[0])
47 #define MAXTAGLEN 16
48 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
49
50 /* enums */
51 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
52 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
53 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
54 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
55
56 /* typedefs */
57 typedef struct Client Client;
58 struct Client {
59 char name[256];
60 int x, y, w, h;
61 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
62 int minax, maxax, minay, maxay;
63 long flags;
64 unsigned int border, oldborder;
65 Bool isbanned, isfixed, isfloating, isurgent;
66 Bool *tags;
67 Client *next;
68 Client *prev;
69 Client *snext;
70 Window win;
71 };
72
73 typedef struct {
74 int x, y, w, h;
75 unsigned long norm[ColLast];
76 unsigned long sel[ColLast];
77 Drawable drawable;
78 GC gc;
79 struct {
80 int ascent;
81 int descent;
82 int height;
83 XFontSet set;
84 XFontStruct *xfont;
85 } font;
86 } DC; /* draw context */
87
88 typedef struct {
89 unsigned long mod;
90 KeySym keysym;
91 void (*func)(const char *arg);
92 const char *arg;
93 } Key;
94
95 typedef struct {
96 const char *symbol;
97 void (*arrange)(void);
98 Bool isfloating;
99 } Layout;
100
101 typedef struct {
102 const char *class;
103 const char *instance;
104 const char *title;
105 const char *tag;
106 Bool isfloating;
107 } Rule;
108
109 /* function declarations */
110 void applygeom(const char *arg);
111 void applyrules(Client *c);
112 void arrange(void);
113 void attach(Client *c);
114 void attachstack(Client *c);
115 void ban(Client *c);
116 void buttonpress(XEvent *e);
117 void checkotherwm(void);
118 void cleanup(void);
119 void configure(Client *c);
120 void configurenotify(XEvent *e);
121 void configurerequest(XEvent *e);
122 unsigned int counttiled(void);
123 void destroynotify(XEvent *e);
124 void detach(Client *c);
125 void detachstack(Client *c);
126 void drawbar(void);
127 void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
128 void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
129 void *emallocz(unsigned int size);
130 void enternotify(XEvent *e);
131 void eprint(const char *errstr, ...);
132 void expose(XEvent *e);
133 void floating(void); /* default floating layout */
134 void focus(Client *c);
135 void focusin(XEvent *e);
136 void focusnext(const char *arg);
137 void focusprev(const char *arg);
138 Client *getclient(Window w);
139 unsigned long getcolor(const char *colstr);
140 double getdouble(const char *s);
141 long getstate(Window w);
142 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
143 void grabbuttons(Client *c, Bool focused);
144 void grabkeys(void);
145 unsigned int idxoftag(const char *t);
146 void initfont(const char *fontstr);
147 Bool isoccupied(unsigned int t);
148 Bool isprotodel(Client *c);
149 Bool isurgent(unsigned int t);
150 Bool isvisible(Client *c);
151 void keypress(XEvent *e);
152 void killclient(const char *arg);
153 void manage(Window w, XWindowAttributes *wa);
154 void mappingnotify(XEvent *e);
155 void maprequest(XEvent *e);
156 void monocle(void);
157 void movemouse(Client *c);
158 Client *nexttiled(Client *c);
159 void propertynotify(XEvent *e);
160 void quit(const char *arg);
161 void reapply(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 setgeom(const char *arg);
169 void setlayout(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 tileh(void);
176 void tilehstack(unsigned int n);
177 Client *tilemaster(unsigned int n);
178 void tileresize(Client *c, int x, int y, int w, int h);
179 void tilev(void);
180 void tilevstack(unsigned int n);
181 void togglefloating(const char *arg);
182 void toggletag(const char *arg);
183 void toggleview(const char *arg);
184 void unban(Client *c);
185 void unmanage(Client *c);
186 void unmapnotify(XEvent *e);
187 void updatebarpos(void);
188 void updatesizehints(Client *c);
189 void updatetitle(Client *c);
190 void updatewmhints(Client *c);
191 void view(const char *arg);
192 void viewprevtag(const char *arg); /* views previous selected tags */
193 int xerror(Display *dpy, XErrorEvent *ee);
194 int xerrordummy(Display *dpy, XErrorEvent *ee);
195 int xerrorstart(Display *dpy, XErrorEvent *ee);
196 void zoom(const char *arg);
197
198 /* variables */
199 char stext[256], buf[256];
200 int screen, sx, sy, sw, sh;
201 int (*xerrorxlib)(Display *, XErrorEvent *);
202 int bx, by, bw, bh, blw, mx, my, mw, mh, mox, moy, mow, moh, tx, ty, tw, th, wx, wy, ww, wh;
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 [Expose] = expose,
211 [FocusIn] = focusin,
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 *prevtags;
222 Bool *seltags;
223 Client *clients = NULL;
224 Client *sel = NULL;
225 Client *stack = NULL;
226 Cursor cursor[CurLast];
227 Display *dpy;
228 DC dc = {0};
229 Layout *lt = NULL;
230 Window root, barwin;
231
232 /* configuration, allows nested code to access above variables */
233 #include "config.h"
234 #define TAGSZ (LENGTH(tags) * sizeof(Bool))
235 static Bool tmp[LENGTH(tags)];
236
237 /* function implementations */
238
239 void
240 applygeometry(const char *arg) {
241 static const char *lastArg = NULL;
242 char delim, op, *s, *e, *p;
243 double val;
244 int i, *map[] = { &bx, &by, &bw, &bh,
245 &wx, &wy, &ww, &wh,
246 &mx, &my, &mw, &mh,
247 &tx, &ty, &tw, &th,
248 &mox, &moy, &mow, &moh };
249
250 if(!arg)
251 arg = lastArg;
252 else
253 lastArg = arg;
254 if(!lastArg)
255 return;
256 strncpy(buf, arg, sizeof buf);
257 for(i = 0, e = s = buf; i < LENGTH(map) && e; e++)
258 if(*e == ' ' || *e == 0) {
259 delim = *e;
260 *e = 0;
261 op = 0;
262 /* check if there is an operator */
263 for(p = s; p < e && *p != '-' && *p != '+' && *p != '*'; p++);
264 if(*p) {
265 op = *p;
266 *p = 0;
267 }
268 val = getdouble(s);
269 if(op && p > s) { /* intermediate operand, e.g. H-B */
270 *(map[i]) = (int)val;
271 s = ++p;
272 val = getdouble(s);
273 }
274 switch(op) {
275 default: *(map[i]) = (int)val; break;
276 case '-': *(map[i]) -= (int)val; break;
277 case '+': *(map[i]) += (int)val; break;
278 case '*': *(map[i]) = (int)(((double)*(map[i])) * val); break;
279 }
280 if(delim == 0)
281 e = NULL;
282 else
283 s = ++e;
284 i++;
285 }
286 }
287
288 void
289 applyrules(Client *c) {
290 unsigned int i;
291 Bool matched = False;
292 Rule *r;
293 XClassHint ch = { 0 };
294
295 /* rule matching */
296 XGetClassHint(dpy, c->win, &ch);
297 for(i = 0; i < LENGTH(rules); i++) {
298 r = &rules[i];
299 if(strstr(c->name, r->title)
300 || (ch.res_class && r->class && strstr(ch.res_class, r->class))
301 || (ch.res_name && r->instance && strstr(ch.res_name, r->instance)))
302 {
303 c->isfloating = r->isfloating;
304 if(r->tag) {
305 c->tags[idxoftag(r->tag)] = True;
306 matched = True;
307 }
308 }
309 }
310 if(ch.res_class)
311 XFree(ch.res_class);
312 if(ch.res_name)
313 XFree(ch.res_name);
314 if(!matched)
315 memcpy(c->tags, seltags, TAGSZ);
316 }
317
318 void
319 arrange(void) {
320 Client *c;
321
322 for(c = clients; c; c = c->next)
323 if(isvisible(c))
324 unban(c);
325 else
326 ban(c);
327
328 focus(NULL);
329 lt->arrange();
330 restack();
331 }
332
333 void
334 attach(Client *c) {
335 if(clients)
336 clients->prev = c;
337 c->next = clients;
338 clients = c;
339 }
340
341 void
342 attachstack(Client *c) {
343 c->snext = stack;
344 stack = c;
345 }
346
347 void
348 ban(Client *c) {
349 if(c->isbanned)
350 return;
351 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
352 c->isbanned = True;
353 }
354
355 void
356 buttonpress(XEvent *e) {
357 unsigned int i, x;
358 Client *c;
359 XButtonPressedEvent *ev = &e->xbutton;
360
361 if(ev->window == barwin) {
362 x = 0;
363 for(i = 0; i < LENGTH(tags); i++) {
364 x += textw(tags[i]);
365 if(ev->x < x) {
366 if(ev->button == Button1) {
367 if(ev->state & MODKEY)
368 tag(tags[i]);
369 else
370 view(tags[i]);
371 }
372 else if(ev->button == Button3) {
373 if(ev->state & MODKEY)
374 toggletag(tags[i]);
375 else
376 toggleview(tags[i]);
377 }
378 return;
379 }
380 }
381 }
382 else if((c = getclient(ev->window))) {
383 focus(c);
384 if(CLEANMASK(ev->state) != MODKEY)
385 return;
386 if(ev->button == Button1) {
387 restack();
388 movemouse(c);
389 }
390 else if(ev->button == Button2) {
391 if((floating != lt->arrange) && c->isfloating)
392 togglefloating(NULL);
393 else
394 zoom(NULL);
395 }
396 else if(ev->button == Button3 && !c->isfixed) {
397 restack();
398 resizemouse(c);
399 }
400 }
401 }
402
403 void
404 checkotherwm(void) {
405 otherwm = False;
406 XSetErrorHandler(xerrorstart);
407
408 /* this causes an error if some other window manager is running */
409 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
410 XSync(dpy, False);
411 if(otherwm)
412 eprint("dwm: another window manager is already running\n");
413 XSync(dpy, False);
414 XSetErrorHandler(NULL);
415 xerrorxlib = XSetErrorHandler(xerror);
416 XSync(dpy, False);
417 }
418
419 void
420 cleanup(void) {
421 close(STDIN_FILENO);
422 while(stack) {
423 unban(stack);
424 unmanage(stack);
425 }
426 if(dc.font.set)
427 XFreeFontSet(dpy, dc.font.set);
428 else
429 XFreeFont(dpy, dc.font.xfont);
430 XUngrabKey(dpy, AnyKey, AnyModifier, root);
431 XFreePixmap(dpy, dc.drawable);
432 XFreeGC(dpy, dc.gc);
433 XFreeCursor(dpy, cursor[CurNormal]);
434 XFreeCursor(dpy, cursor[CurResize]);
435 XFreeCursor(dpy, cursor[CurMove]);
436 XDestroyWindow(dpy, barwin);
437 XSync(dpy, False);
438 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
439 }
440
441 void
442 configure(Client *c) {
443 XConfigureEvent ce;
444
445 ce.type = ConfigureNotify;
446 ce.display = dpy;
447 ce.event = c->win;
448 ce.window = c->win;
449 ce.x = c->x;
450 ce.y = c->y;
451 ce.width = c->w;
452 ce.height = c->h;
453 ce.border_width = c->border;
454 ce.above = None;
455 ce.override_redirect = False;
456 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
457 }
458
459 void
460 configurenotify(XEvent *e) {
461 XConfigureEvent *ev = &e->xconfigure;
462
463 if(ev->window == root && (ev->width != sw || ev->height != sh))
464 setgeom(NULL);
465 }
466
467 void
468 configurerequest(XEvent *e) {
469 Client *c;
470 XConfigureRequestEvent *ev = &e->xconfigurerequest;
471 XWindowChanges wc;
472
473 if((c = getclient(ev->window))) {
474 if(ev->value_mask & CWBorderWidth)
475 c->border = ev->border_width;
476 if(c->isfixed || c->isfloating || lt->isfloating) {
477 if(ev->value_mask & CWX)
478 c->x = sx + ev->x;
479 if(ev->value_mask & CWY)
480 c->y = sy + ev->y;
481 if(ev->value_mask & CWWidth)
482 c->w = ev->width;
483 if(ev->value_mask & CWHeight)
484 c->h = ev->height;
485 if((c->x - sx + c->w) > sw && c->isfloating)
486 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
487 if((c->y - sy + c->h) > sh && c->isfloating)
488 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
489 if((ev->value_mask & (CWX|CWY))
490 && !(ev->value_mask & (CWWidth|CWHeight)))
491 configure(c);
492 if(isvisible(c))
493 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
494 }
495 else
496 configure(c);
497 }
498 else {
499 wc.x = ev->x;
500 wc.y = ev->y;
501 wc.width = ev->width;
502 wc.height = ev->height;
503 wc.border_width = ev->border_width;
504 wc.sibling = ev->above;
505 wc.stack_mode = ev->detail;
506 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
507 }
508 XSync(dpy, False);
509 }
510
511 unsigned int
512 counttiled(void) {
513 unsigned int n;
514 Client *c;
515
516 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
517 return n;
518 }
519
520 void
521 destroynotify(XEvent *e) {
522 Client *c;
523 XDestroyWindowEvent *ev = &e->xdestroywindow;
524
525 if((c = getclient(ev->window)))
526 unmanage(c);
527 }
528
529 void
530 detach(Client *c) {
531 if(c->prev)
532 c->prev->next = c->next;
533 if(c->next)
534 c->next->prev = c->prev;
535 if(c == clients)
536 clients = c->next;
537 c->next = c->prev = NULL;
538 }
539
540 void
541 detachstack(Client *c) {
542 Client **tc;
543
544 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
545 *tc = c->snext;
546 }
547
548 void
549 drawbar(void) {
550 int i, x;
551 Client *c;
552
553 dc.x = 0;
554 for(c = stack; c && !isvisible(c); c = c->snext);
555 for(i = 0; i < LENGTH(tags); i++) {
556 dc.w = textw(tags[i]);
557 if(seltags[i]) {
558 drawtext(tags[i], dc.sel, isurgent(i));
559 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
560 }
561 else {
562 drawtext(tags[i], dc.norm, isurgent(i));
563 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
564 }
565 dc.x += dc.w;
566 }
567 dc.w = blw;
568 drawtext(lt->symbol, dc.norm, False);
569 x = dc.x + dc.w;
570 dc.w = textw(stext);
571 dc.x = bw - dc.w;
572 if(dc.x < x) {
573 dc.x = x;
574 dc.w = bw - x;
575 }
576 drawtext(stext, dc.norm, False);
577 if((dc.w = dc.x - x) > bh) {
578 dc.x = x;
579 if(c) {
580 drawtext(c->name, dc.sel, False);
581 drawsquare(False, c->isfloating, False, dc.sel);
582 }
583 else
584 drawtext(NULL, dc.norm, False);
585 }
586 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
587 XSync(dpy, False);
588 }
589
590 void
591 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
592 int x;
593 XGCValues gcv;
594 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
595
596 gcv.foreground = col[invert ? ColBG : ColFG];
597 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
598 x = (dc.font.ascent + dc.font.descent + 2) / 4;
599 r.x = dc.x + 1;
600 r.y = dc.y + 1;
601 if(filled) {
602 r.width = r.height = x + 1;
603 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
604 }
605 else if(empty) {
606 r.width = r.height = x;
607 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
608 }
609 }
610
611 void
612 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
613 int x, y, w, h;
614 unsigned int len, olen;
615 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
616
617 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
618 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
619 if(!text)
620 return;
621 w = 0;
622 olen = len = strlen(text);
623 if(len >= sizeof buf)
624 len = sizeof buf - 1;
625 memcpy(buf, text, len);
626 buf[len] = 0;
627 h = dc.font.ascent + dc.font.descent;
628 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
629 x = dc.x + (h / 2);
630 /* shorten text if necessary */
631 while(len && (w = textnw(buf, len)) > dc.w - h)
632 buf[--len] = 0;
633 if(len < olen) {
634 if(len > 1)
635 buf[len - 1] = '.';
636 if(len > 2)
637 buf[len - 2] = '.';
638 if(len > 3)
639 buf[len - 3] = '.';
640 }
641 if(w > dc.w)
642 return; /* too long */
643 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
644 if(dc.font.set)
645 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
646 else
647 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
648 }
649
650 void *
651 emallocz(unsigned int size) {
652 void *res = calloc(1, size);
653
654 if(!res)
655 eprint("fatal: could not malloc() %u bytes\n", size);
656 return res;
657 }
658
659 void
660 enternotify(XEvent *e) {
661 Client *c;
662 XCrossingEvent *ev = &e->xcrossing;
663
664 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
665 return;
666 if((c = getclient(ev->window)))
667 focus(c);
668 else
669 focus(NULL);
670 }
671
672 void
673 eprint(const char *errstr, ...) {
674 va_list ap;
675
676 va_start(ap, errstr);
677 vfprintf(stderr, errstr, ap);
678 va_end(ap);
679 exit(EXIT_FAILURE);
680 }
681
682 void
683 expose(XEvent *e) {
684 XExposeEvent *ev = &e->xexpose;
685
686 if(ev->count == 0 && (ev->window == barwin))
687 drawbar();
688 }
689
690 void
691 floating(void) { /* default floating layout */
692 Client *c;
693
694 for(c = clients; c; c = c->next)
695 if(isvisible(c))
696 resize(c, c->x, c->y, c->w, c->h, True);
697 }
698
699 void
700 focus(Client *c) {
701 if(!c || (c && !isvisible(c)))
702 for(c = stack; c && !isvisible(c); c = c->snext);
703 if(sel && sel != c) {
704 grabbuttons(sel, False);
705 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
706 }
707 if(c) {
708 detachstack(c);
709 attachstack(c);
710 grabbuttons(c, True);
711 }
712 sel = c;
713 if(c) {
714 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
715 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
716 }
717 else
718 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
719 drawbar();
720 }
721
722 void
723 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
724 XFocusChangeEvent *ev = &e->xfocus;
725
726 if(sel && ev->window != sel->win)
727 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
728 }
729
730 void
731 focusnext(const char *arg) {
732 Client *c;
733
734 if(!sel)
735 return;
736 for(c = sel->next; c && !isvisible(c); c = c->next);
737 if(!c)
738 for(c = clients; c && !isvisible(c); c = c->next);
739 if(c) {
740 focus(c);
741 restack();
742 }
743 }
744
745 void
746 focusprev(const char *arg) {
747 Client *c;
748
749 if(!sel)
750 return;
751 for(c = sel->prev; c && !isvisible(c); c = c->prev);
752 if(!c) {
753 for(c = clients; c && c->next; c = c->next);
754 for(; c && !isvisible(c); c = c->prev);
755 }
756 if(c) {
757 focus(c);
758 restack();
759 }
760 }
761
762 Client *
763 getclient(Window w) {
764 Client *c;
765
766 for(c = clients; c && c->win != w; c = c->next);
767 return c;
768 }
769
770 unsigned long
771 getcolor(const char *colstr) {
772 Colormap cmap = DefaultColormap(dpy, screen);
773 XColor color;
774
775 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
776 eprint("error, cannot allocate color '%s'\n", colstr);
777 return color.pixel;
778 }
779
780 long
781 getstate(Window w) {
782 int format, status;
783 long result = -1;
784 unsigned char *p = NULL;
785 unsigned long n, extra;
786 Atom real;
787
788 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
789 &real, &format, &n, &extra, (unsigned char **)&p);
790 if(status != Success)
791 return -1;
792 if(n != 0)
793 result = *p;
794 XFree(p);
795 return result;
796 }
797
798 Bool
799 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
800 char **list = NULL;
801 int n;
802 XTextProperty name;
803
804 if(!text || size == 0)
805 return False;
806 text[0] = '\0';
807 XGetTextProperty(dpy, w, &name, atom);
808 if(!name.nitems)
809 return False;
810 if(name.encoding == XA_STRING)
811 strncpy(text, (char *)name.value, size - 1);
812 else {
813 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
814 && n > 0 && *list) {
815 strncpy(text, *list, size - 1);
816 XFreeStringList(list);
817 }
818 }
819 text[size - 1] = '\0';
820 XFree(name.value);
821 return True;
822 }
823
824 void
825 grabbuttons(Client *c, Bool focused) {
826 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
827
828 if(focused) {
829 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
830 GrabModeAsync, GrabModeSync, None, None);
831 XGrabButton(dpy, Button1, MODKEY|LockMask, c->win, False, BUTTONMASK,
832 GrabModeAsync, GrabModeSync, None, None);
833 XGrabButton(dpy, Button1, MODKEY|numlockmask, c->win, False, BUTTONMASK,
834 GrabModeAsync, GrabModeSync, None, None);
835 XGrabButton(dpy, Button1, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
836 GrabModeAsync, GrabModeSync, None, None);
837
838 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
839 GrabModeAsync, GrabModeSync, None, None);
840 XGrabButton(dpy, Button2, MODKEY|LockMask, c->win, False, BUTTONMASK,
841 GrabModeAsync, GrabModeSync, None, None);
842 XGrabButton(dpy, Button2, MODKEY|numlockmask, c->win, False, BUTTONMASK,
843 GrabModeAsync, GrabModeSync, None, None);
844 XGrabButton(dpy, Button2, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
845 GrabModeAsync, GrabModeSync, None, None);
846
847 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
848 GrabModeAsync, GrabModeSync, None, None);
849 XGrabButton(dpy, Button3, MODKEY|LockMask, c->win, False, BUTTONMASK,
850 GrabModeAsync, GrabModeSync, None, None);
851 XGrabButton(dpy, Button3, MODKEY|numlockmask, c->win, False, BUTTONMASK,
852 GrabModeAsync, GrabModeSync, None, None);
853 XGrabButton(dpy, Button3, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
854 GrabModeAsync, GrabModeSync, None, None);
855 }
856 else
857 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
858 GrabModeAsync, GrabModeSync, None, None);
859 }
860
861 void
862 grabkeys(void) {
863 unsigned int i, j;
864 KeyCode code;
865 XModifierKeymap *modmap;
866
867 /* init modifier map */
868 modmap = XGetModifierMapping(dpy);
869 for(i = 0; i < 8; i++)
870 for(j = 0; j < modmap->max_keypermod; j++) {
871 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
872 numlockmask = (1 << i);
873 }
874 XFreeModifiermap(modmap);
875
876 XUngrabKey(dpy, AnyKey, AnyModifier, root);
877 for(i = 0; i < LENGTH(keys); i++) {
878 code = XKeysymToKeycode(dpy, keys[i].keysym);
879 XGrabKey(dpy, code, keys[i].mod, root, True,
880 GrabModeAsync, GrabModeAsync);
881 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
882 GrabModeAsync, GrabModeAsync);
883 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
884 GrabModeAsync, GrabModeAsync);
885 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
886 GrabModeAsync, GrabModeAsync);
887 }
888 }
889
890 unsigned int
891 idxoftag(const char *t) {
892 unsigned int i;
893
894 for(i = 0; (i < LENGTH(tags)) && (tags[i] != t); i++);
895 return (i < LENGTH(tags)) ? i : 0;
896 }
897
898 void
899 initfont(const char *fontstr) {
900 char *def, **missing;
901 int i, n;
902
903 missing = NULL;
904 if(dc.font.set)
905 XFreeFontSet(dpy, dc.font.set);
906 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
907 if(missing) {
908 while(n--)
909 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
910 XFreeStringList(missing);
911 }
912 if(dc.font.set) {
913 XFontSetExtents *font_extents;
914 XFontStruct **xfonts;
915 char **font_names;
916 dc.font.ascent = dc.font.descent = 0;
917 font_extents = XExtentsOfFontSet(dc.font.set);
918 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
919 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
920 if(dc.font.ascent < (*xfonts)->ascent)
921 dc.font.ascent = (*xfonts)->ascent;
922 if(dc.font.descent < (*xfonts)->descent)
923 dc.font.descent = (*xfonts)->descent;
924 xfonts++;
925 }
926 }
927 else {
928 if(dc.font.xfont)
929 XFreeFont(dpy, dc.font.xfont);
930 dc.font.xfont = NULL;
931 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
932 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
933 eprint("error, cannot load font: '%s'\n", fontstr);
934 dc.font.ascent = dc.font.xfont->ascent;
935 dc.font.descent = dc.font.xfont->descent;
936 }
937 dc.font.height = dc.font.ascent + dc.font.descent;
938 }
939
940 Bool
941 isoccupied(unsigned int t) {
942 Client *c;
943
944 for(c = clients; c; c = c->next)
945 if(c->tags[t])
946 return True;
947 return False;
948 }
949
950 Bool
951 isprotodel(Client *c) {
952 int i, n;
953 Atom *protocols;
954 Bool ret = False;
955
956 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
957 for(i = 0; !ret && i < n; i++)
958 if(protocols[i] == wmatom[WMDelete])
959 ret = True;
960 XFree(protocols);
961 }
962 return ret;
963 }
964
965 Bool
966 isurgent(unsigned int t) {
967 Client *c;
968
969 for(c = clients; c; c = c->next)
970 if(c->isurgent && c->tags[t])
971 return True;
972 return False;
973 }
974
975 Bool
976 isvisible(Client *c) {
977 unsigned int i;
978
979 for(i = 0; i < LENGTH(tags); i++)
980 if(c->tags[i] && seltags[i])
981 return True;
982 return False;
983 }
984
985 void
986 keypress(XEvent *e) {
987 unsigned int i;
988 KeySym keysym;
989 XKeyEvent *ev;
990
991 ev = &e->xkey;
992 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
993 for(i = 0; i < LENGTH(keys); i++)
994 if(keysym == keys[i].keysym
995 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
996 {
997 if(keys[i].func)
998 keys[i].func(keys[i].arg);
999 }
1000 }
1001
1002 void
1003 killclient(const char *arg) {
1004 XEvent ev;
1005
1006 if(!sel)
1007 return;
1008 if(isprotodel(sel)) {
1009 ev.type = ClientMessage;
1010 ev.xclient.window = sel->win;
1011 ev.xclient.message_type = wmatom[WMProtocols];
1012 ev.xclient.format = 32;
1013 ev.xclient.data.l[0] = wmatom[WMDelete];
1014 ev.xclient.data.l[1] = CurrentTime;
1015 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1016 }
1017 else
1018 XKillClient(dpy, sel->win);
1019 }
1020
1021 void
1022 manage(Window w, XWindowAttributes *wa) {
1023 Client *c, *t = NULL;
1024 Status rettrans;
1025 Window trans;
1026 XWindowChanges wc;
1027
1028 c = emallocz(sizeof(Client));
1029 c->tags = emallocz(TAGSZ);
1030 c->win = w;
1031
1032 /* geometry */
1033 c->x = wa->x;
1034 c->y = wa->y;
1035 c->w = wa->width;
1036 c->h = wa->height;
1037 c->oldborder = wa->border_width;
1038 if(c->w == sw && c->h == sh) {
1039 c->x = sx;
1040 c->y = sy;
1041 c->border = wa->border_width;
1042 }
1043 else {
1044 if(c->x + c->w + 2 * c->border > wx + ww)
1045 c->x = wx + ww - c->w - 2 * c->border;
1046 if(c->y + c->h + 2 * c->border > wy + wh)
1047 c->y = wy + wh - c->h - 2 * c->border;
1048 if(c->x < wx)
1049 c->x = wx;
1050 if(c->y < wy)
1051 c->y = wy;
1052 c->border = BORDERPX;
1053 }
1054
1055 wc.border_width = c->border;
1056 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1057 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1058 configure(c); /* propagates border_width, if size doesn't change */
1059 updatesizehints(c);
1060 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1061 grabbuttons(c, False);
1062 updatetitle(c);
1063 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1064 for(t = clients; t && t->win != trans; t = t->next);
1065 if(t)
1066 memcpy(c->tags, t->tags, TAGSZ);
1067 else
1068 applyrules(c);
1069 if(!c->isfloating)
1070 c->isfloating = (rettrans == Success) || c->isfixed;
1071 attach(c);
1072 attachstack(c);
1073 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1074 ban(c);
1075 XMapWindow(dpy, c->win);
1076 setclientstate(c, NormalState);
1077 arrange();
1078 }
1079
1080 void
1081 mappingnotify(XEvent *e) {
1082 XMappingEvent *ev = &e->xmapping;
1083
1084 XRefreshKeyboardMapping(ev);
1085 if(ev->request == MappingKeyboard)
1086 grabkeys();
1087 }
1088
1089 void
1090 maprequest(XEvent *e) {
1091 static XWindowAttributes wa;
1092 XMapRequestEvent *ev = &e->xmaprequest;
1093
1094 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1095 return;
1096 if(wa.override_redirect)
1097 return;
1098 if(!getclient(ev->window))
1099 manage(ev->window, &wa);
1100 }
1101
1102 void
1103 monocle(void) {
1104 Client *c;
1105
1106 for(c = clients; c; c = c->next)
1107 if(isvisible(c))
1108 resize(c, mox, moy, mow, moh, RESIZEHINTS);
1109 }
1110
1111 void
1112 movemouse(Client *c) {
1113 int x1, y1, ocx, ocy, di, nx, ny;
1114 unsigned int dui;
1115 Window dummy;
1116 XEvent ev;
1117
1118 ocx = nx = c->x;
1119 ocy = ny = c->y;
1120 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1121 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1122 return;
1123 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1124 for(;;) {
1125 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1126 switch (ev.type) {
1127 case ButtonRelease:
1128 XUngrabPointer(dpy, CurrentTime);
1129 return;
1130 case ConfigureRequest:
1131 case Expose:
1132 case MapRequest:
1133 handler[ev.type](&ev);
1134 break;
1135 case MotionNotify:
1136 XSync(dpy, False);
1137 nx = ocx + (ev.xmotion.x - x1);
1138 ny = ocy + (ev.xmotion.y - y1);
1139 if(abs(wx - nx) < SNAP)
1140 nx = wx;
1141 else if(abs((wx + ww) - (nx + c->w + 2 * c->border)) < SNAP)
1142 nx = wx + ww - c->w - 2 * c->border;
1143 if(abs(wy - ny) < SNAP)
1144 ny = wy;
1145 else if(abs((wy + wh) - (ny + c->h + 2 * c->border)) < SNAP)
1146 ny = wy + wh - c->h - 2 * c->border;
1147 if(!c->isfloating && !lt->isfloating && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1148 togglefloating(NULL);
1149 if((lt->isfloating) || c->isfloating)
1150 resize(c, nx, ny, c->w, c->h, False);
1151 break;
1152 }
1153 }
1154 }
1155
1156 Client *
1157 nexttiled(Client *c) {
1158 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1159 return c;
1160 }
1161
1162 void
1163 propertynotify(XEvent *e) {
1164 Client *c;
1165 Window trans;
1166 XPropertyEvent *ev = &e->xproperty;
1167
1168 if(ev->state == PropertyDelete)
1169 return; /* ignore */
1170 if((c = getclient(ev->window))) {
1171 switch (ev->atom) {
1172 default: break;
1173 case XA_WM_TRANSIENT_FOR:
1174 XGetTransientForHint(dpy, c->win, &trans);
1175 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1176 arrange();
1177 break;
1178 case XA_WM_NORMAL_HINTS:
1179 updatesizehints(c);
1180 break;
1181 case XA_WM_HINTS:
1182 updatewmhints(c);
1183 drawbar();
1184 break;
1185 }
1186 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1187 updatetitle(c);
1188 if(c == sel)
1189 drawbar();
1190 }
1191 }
1192 }
1193
1194 void
1195 quit(const char *arg) {
1196 readin = running = False;
1197 }
1198
1199 void
1200 reapply(const char *arg) {
1201 static Bool zerotags[LENGTH(tags)] = { 0 };
1202 Client *c;
1203
1204 for(c = clients; c; c = c->next) {
1205 memcpy(c->tags, zerotags, sizeof zerotags);
1206 applyrules(c);
1207 }
1208 arrange();
1209 }
1210
1211 void
1212 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1213 XWindowChanges wc;
1214
1215 if(sizehints) {
1216 /* set minimum possible */
1217 if (w < 1)
1218 w = 1;
1219 if (h < 1)
1220 h = 1;
1221
1222 /* temporarily remove base dimensions */
1223 w -= c->basew;
1224 h -= c->baseh;
1225
1226 /* adjust for aspect limits */
1227 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1228 if (w * c->maxay > h * c->maxax)
1229 w = h * c->maxax / c->maxay;
1230 else if (w * c->minay < h * c->minax)
1231 h = w * c->minay / c->minax;
1232 }
1233
1234 /* adjust for increment value */
1235 if(c->incw)
1236 w -= w % c->incw;
1237 if(c->inch)
1238 h -= h % c->inch;
1239
1240 /* restore base dimensions */
1241 w += c->basew;
1242 h += c->baseh;
1243
1244 if(c->minw > 0 && w < c->minw)
1245 w = c->minw;
1246 if(c->minh > 0 && h < c->minh)
1247 h = c->minh;
1248 if(c->maxw > 0 && w > c->maxw)
1249 w = c->maxw;
1250 if(c->maxh > 0 && h > c->maxh)
1251 h = c->maxh;
1252 }
1253 if(w <= 0 || h <= 0)
1254 return;
1255 if(x > sx + sw)
1256 x = sw - w - 2 * c->border;
1257 if(y > sy + sh)
1258 y = sh - h - 2 * c->border;
1259 if(x + w + 2 * c->border < sx)
1260 x = sx;
1261 if(y + h + 2 * c->border < sy)
1262 y = sy;
1263 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1264 c->x = wc.x = x;
1265 c->y = wc.y = y;
1266 c->w = wc.width = w;
1267 c->h = wc.height = h;
1268 wc.border_width = c->border;
1269 XConfigureWindow(dpy, c->win,
1270 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1271 configure(c);
1272 XSync(dpy, False);
1273 }
1274 }
1275
1276 void
1277 resizemouse(Client *c) {
1278 int ocx, ocy;
1279 int nw, nh;
1280 XEvent ev;
1281
1282 ocx = c->x;
1283 ocy = c->y;
1284 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1285 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1286 return;
1287 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1288 for(;;) {
1289 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1290 switch(ev.type) {
1291 case ButtonRelease:
1292 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1293 c->w + c->border - 1, c->h + c->border - 1);
1294 XUngrabPointer(dpy, CurrentTime);
1295 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1296 return;
1297 case ConfigureRequest:
1298 case Expose:
1299 case MapRequest:
1300 handler[ev.type](&ev);
1301 break;
1302 case MotionNotify:
1303 XSync(dpy, False);
1304 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1305 nw = 1;
1306 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1307 nh = 1;
1308 if(!c->isfloating && !lt->isfloating && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1309 togglefloating(NULL);
1310 if((lt->isfloating) || c->isfloating)
1311 resize(c, c->x, c->y, nw, nh, True);
1312 break;
1313 }
1314 }
1315 }
1316
1317 void
1318 restack(void) {
1319 Client *c;
1320 XEvent ev;
1321 XWindowChanges wc;
1322
1323 drawbar();
1324 if(!sel)
1325 return;
1326 if(sel->isfloating || lt->isfloating)
1327 XRaiseWindow(dpy, sel->win);
1328 if(!lt->isfloating) {
1329 wc.stack_mode = Below;
1330 wc.sibling = barwin;
1331 if(!sel->isfloating) {
1332 XConfigureWindow(dpy, sel->win, CWSibling|CWStackMode, &wc);
1333 wc.sibling = sel->win;
1334 }
1335 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1336 if(c == sel)
1337 continue;
1338 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1339 wc.sibling = c->win;
1340 }
1341 }
1342 XSync(dpy, False);
1343 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1344 }
1345
1346 void
1347 run(void) {
1348 char *p;
1349 char sbuf[sizeof stext];
1350 fd_set rd;
1351 int r, xfd;
1352 unsigned int len, offset;
1353 XEvent ev;
1354
1355 /* main event loop, also reads status text from stdin */
1356 XSync(dpy, False);
1357 xfd = ConnectionNumber(dpy);
1358 readin = True;
1359 offset = 0;
1360 len = sizeof stext - 1;
1361 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1362 while(running) {
1363 FD_ZERO(&rd);
1364 if(readin)
1365 FD_SET(STDIN_FILENO, &rd);
1366 FD_SET(xfd, &rd);
1367 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1368 if(errno == EINTR)
1369 continue;
1370 eprint("select failed\n");
1371 }
1372 if(FD_ISSET(STDIN_FILENO, &rd)) {
1373 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1374 case -1:
1375 strncpy(stext, strerror(errno), len);
1376 readin = False;
1377 break;
1378 case 0:
1379 strncpy(stext, "EOF", 4);
1380 readin = False;
1381 break;
1382 default:
1383 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1384 if(*p == '\n' || *p == '\0') {
1385 *p = '\0';
1386 strncpy(stext, sbuf, len);
1387 p += r - 1; /* p is sbuf + offset + r - 1 */
1388 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1389 offset = r;
1390 if(r)
1391 memmove(sbuf, p - r + 1, r);
1392 break;
1393 }
1394 break;
1395 }
1396 drawbar();
1397 }
1398 while(XPending(dpy)) {
1399 XNextEvent(dpy, &ev);
1400 if(handler[ev.type])
1401 (handler[ev.type])(&ev); /* call handler */
1402 }
1403 }
1404 }
1405
1406 void
1407 scan(void) {
1408 unsigned int i, num;
1409 Window *wins, d1, d2;
1410 XWindowAttributes wa;
1411
1412 wins = NULL;
1413 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1414 for(i = 0; i < num; i++) {
1415 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1416 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1417 continue;
1418 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1419 manage(wins[i], &wa);
1420 }
1421 for(i = 0; i < num; i++) { /* now the transients */
1422 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1423 continue;
1424 if(XGetTransientForHint(dpy, wins[i], &d1)
1425 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1426 manage(wins[i], &wa);
1427 }
1428 }
1429 if(wins)
1430 XFree(wins);
1431 }
1432
1433 void
1434 setclientstate(Client *c, long state) {
1435 long data[] = {state, None};
1436
1437 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1438 PropModeReplace, (unsigned char *)data, 2);
1439 }
1440
1441 double
1442 getdouble(const char *s) {
1443 char *endp;
1444 double result = 0;
1445
1446 switch(*s) {
1447 default:
1448 result = strtod(s, &endp);
1449 if(s == endp || *endp != 0)
1450 result = strtol(s, &endp, 0);
1451 break;
1452 case 'B': result = dc.font.height + 2; break;
1453 case 'W': result = sw; break;
1454 case 'H': result = sh; break;
1455 }
1456 return result;
1457 }
1458
1459 void
1460 setgeom(const char *arg) {
1461 applygeometry(arg);
1462 updatebarpos();
1463 arrange();
1464 }
1465
1466 void
1467 setlayout(const char *arg) {
1468 static Layout *revert = 0;
1469 unsigned int i;
1470
1471 if(!arg)
1472 return;
1473 for(i = 0; i < LENGTH(layouts); i++)
1474 if(!strcmp(arg, layouts[i].symbol))
1475 break;
1476 if(i == LENGTH(layouts))
1477 return;
1478 if(revert && &layouts[i] == lt)
1479 lt = revert;
1480 else {
1481 revert = lt;
1482 lt = &layouts[i];
1483 }
1484 if(sel)
1485 arrange();
1486 else
1487 drawbar();
1488 }
1489
1490 void
1491 setup(void) {
1492 unsigned int i;
1493 XSetWindowAttributes wa;
1494
1495 /* init screen */
1496 screen = DefaultScreen(dpy);
1497 root = RootWindow(dpy, screen);
1498 initfont(FONT);
1499
1500 /* apply default dimensions */
1501 sx = 0;
1502 sy = 0;
1503 sw = DisplayWidth(dpy, screen);
1504 sh = DisplayHeight(dpy, screen);
1505 applygeometry(GEOMETRY);
1506
1507 /* init atoms */
1508 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1509 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1510 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1511 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1512 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1513 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1514
1515 /* init cursors */
1516 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1517 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1518 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1519
1520 /* init appearance */
1521 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1522 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1523 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1524 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1525 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1526 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1527 initfont(FONT);
1528 dc.h = bh;
1529 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1530 dc.gc = XCreateGC(dpy, root, 0, 0);
1531 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1532 if(!dc.font.set)
1533 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1534
1535 /* init tags */
1536 seltags = emallocz(TAGSZ);
1537 prevtags = emallocz(TAGSZ);
1538 seltags[0] = prevtags[0] = True;
1539
1540 /* init layouts */
1541 lt = &layouts[0];
1542
1543 /* init bar */
1544 for(blw = i = 0; i < LENGTH(layouts); i++) {
1545 i = textw(layouts[i].symbol);
1546 if(i > blw)
1547 blw = i;
1548 }
1549
1550 wa.override_redirect = 1;
1551 wa.background_pixmap = ParentRelative;
1552 wa.event_mask = ButtonPressMask|ExposureMask;
1553
1554 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1555 CopyFromParent, DefaultVisual(dpy, screen),
1556 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1557 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1558 XMapRaised(dpy, barwin);
1559 strcpy(stext, "dwm-"VERSION);
1560 drawbar();
1561
1562 /* EWMH support per view */
1563 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1564 PropModeReplace, (unsigned char *) netatom, NetLast);
1565
1566 /* select for events */
1567 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1568 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1569 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1570 XSelectInput(dpy, root, wa.event_mask);
1571
1572
1573 /* grab keys */
1574 grabkeys();
1575 }
1576
1577 void
1578 spawn(const char *arg) {
1579 static char *shell = NULL;
1580
1581 if(!shell && !(shell = getenv("SHELL")))
1582 shell = "/bin/sh";
1583 if(!arg)
1584 return;
1585 /* The double-fork construct avoids zombie processes and keeps the code
1586 * clean from stupid signal handlers. */
1587 if(fork() == 0) {
1588 if(fork() == 0) {
1589 if(dpy)
1590 close(ConnectionNumber(dpy));
1591 setsid();
1592 execl(shell, shell, "-c", arg, (char *)NULL);
1593 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1594 perror(" failed");
1595 }
1596 exit(0);
1597 }
1598 wait(0);
1599 }
1600
1601 void
1602 tag(const char *arg) {
1603 unsigned int i;
1604
1605 if(!sel)
1606 return;
1607 for(i = 0; i < LENGTH(tags); i++)
1608 sel->tags[i] = (NULL == arg);
1609 sel->tags[idxoftag(arg)] = True;
1610 arrange();
1611 }
1612
1613 unsigned int
1614 textnw(const char *text, unsigned int len) {
1615 XRectangle r;
1616
1617 if(dc.font.set) {
1618 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1619 return r.width;
1620 }
1621 return XTextWidth(dc.font.xfont, text, len);
1622 }
1623
1624 unsigned int
1625 textw(const char *text) {
1626 return textnw(text, strlen(text)) + dc.font.height;
1627 }
1628
1629 void
1630 tileh(void) {
1631 int x, w;
1632 unsigned int i, n = counttiled();
1633 Client *c;
1634
1635 if(n == 0)
1636 return;
1637 c = tilemaster(n);
1638 if(--n == 0)
1639 return;
1640
1641 x = tx;
1642 w = tw / n;
1643 if(w < bh)
1644 w = tw;
1645
1646 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1647 if(i + 1 == n) /* remainder */
1648 tileresize(c, x, ty, (tx + tw) - x - 2 * c->border, th - 2 * c->border);
1649 else
1650 tileresize(c, x, ty, w - 2 * c->border, th - 2 * c->border);
1651 if(w != tw)
1652 x = c->x + c->w + 2 * c->border;
1653 }
1654 }
1655
1656 Client *
1657 tilemaster(unsigned int n) {
1658 Client *c = nexttiled(clients);
1659
1660 if(n == 1)
1661 tileresize(c, mox, moy, mow - 2 * c->border, moh - 2 * c->border);
1662 else
1663 tileresize(c, mx, my, mw - 2 * c->border, mh - 2 * c->border);
1664 return c;
1665 }
1666
1667 void
1668 tileresize(Client *c, int x, int y, int w, int h) {
1669 resize(c, x, y, w, h, RESIZEHINTS);
1670 if((RESIZEHINTS) && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
1671 /* client doesn't accept size constraints */
1672 resize(c, x, y, w, h, False);
1673 }
1674
1675 void
1676 tilev(void) {
1677 int y, h;
1678 unsigned int i, n = counttiled();
1679 Client *c;
1680
1681 if(n == 0)
1682 return;
1683 c = tilemaster(n);
1684 if(--n == 0)
1685 return;
1686
1687 y = ty;
1688 h = th / n;
1689 if(h < bh)
1690 h = th;
1691
1692 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1693 if(i + 1 == n) /* remainder */
1694 tileresize(c, tx, y, tw - 2 * c->border, (ty + th) - y - 2 * c->border);
1695 else
1696 tileresize(c, tx, y, tw - 2 * c->border, h - 2 * c->border);
1697 if(h != th)
1698 y = c->y + c->h + 2 * c->border;
1699 }
1700 }
1701
1702 void
1703 togglefloating(const char *arg) {
1704 if(!sel)
1705 return;
1706 sel->isfloating = !sel->isfloating;
1707 if(sel->isfloating)
1708 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1709 arrange();
1710 }
1711
1712 void
1713 toggletag(const char *arg) {
1714 unsigned int i, j;
1715
1716 if(!sel)
1717 return;
1718 i = idxoftag(arg);
1719 sel->tags[i] = !sel->tags[i];
1720 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1721 if(j == LENGTH(tags))
1722 sel->tags[i] = True; /* at least one tag must be enabled */
1723 arrange();
1724 }
1725
1726 void
1727 toggleview(const char *arg) {
1728 unsigned int i, j;
1729
1730 i = idxoftag(arg);
1731 seltags[i] = !seltags[i];
1732 for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1733 if(j == LENGTH(tags))
1734 seltags[i] = True; /* at least one tag must be viewed */
1735 arrange();
1736 }
1737
1738 void
1739 unban(Client *c) {
1740 if(!c->isbanned)
1741 return;
1742 XMoveWindow(dpy, c->win, c->x, c->y);
1743 c->isbanned = False;
1744 }
1745
1746 void
1747 unmanage(Client *c) {
1748 XWindowChanges wc;
1749
1750 wc.border_width = c->oldborder;
1751 /* The server grab construct avoids race conditions. */
1752 XGrabServer(dpy);
1753 XSetErrorHandler(xerrordummy);
1754 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1755 detach(c);
1756 detachstack(c);
1757 if(sel == c)
1758 focus(NULL);
1759 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1760 setclientstate(c, WithdrawnState);
1761 free(c->tags);
1762 free(c);
1763 XSync(dpy, False);
1764 XSetErrorHandler(xerror);
1765 XUngrabServer(dpy);
1766 arrange();
1767 }
1768
1769 void
1770 unmapnotify(XEvent *e) {
1771 Client *c;
1772 XUnmapEvent *ev = &e->xunmap;
1773
1774 if((c = getclient(ev->window)))
1775 unmanage(c);
1776 }
1777
1778 void
1779 updatebarpos(void) {
1780
1781 if(dc.drawable != 0)
1782 XFreePixmap(dpy, dc.drawable);
1783 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1784 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1785 }
1786
1787 void
1788 updatesizehints(Client *c) {
1789 long msize;
1790 XSizeHints size;
1791
1792 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1793 size.flags = PSize;
1794 c->flags = size.flags;
1795 if(c->flags & PBaseSize) {
1796 c->basew = size.base_width;
1797 c->baseh = size.base_height;
1798 }
1799 else if(c->flags & PMinSize) {
1800 c->basew = size.min_width;
1801 c->baseh = size.min_height;
1802 }
1803 else
1804 c->basew = c->baseh = 0;
1805 if(c->flags & PResizeInc) {
1806 c->incw = size.width_inc;
1807 c->inch = size.height_inc;
1808 }
1809 else
1810 c->incw = c->inch = 0;
1811 if(c->flags & PMaxSize) {
1812 c->maxw = size.max_width;
1813 c->maxh = size.max_height;
1814 }
1815 else
1816 c->maxw = c->maxh = 0;
1817 if(c->flags & PMinSize) {
1818 c->minw = size.min_width;
1819 c->minh = size.min_height;
1820 }
1821 else if(c->flags & PBaseSize) {
1822 c->minw = size.base_width;
1823 c->minh = size.base_height;
1824 }
1825 else
1826 c->minw = c->minh = 0;
1827 if(c->flags & PAspect) {
1828 c->minax = size.min_aspect.x;
1829 c->maxax = size.max_aspect.x;
1830 c->minay = size.min_aspect.y;
1831 c->maxay = size.max_aspect.y;
1832 }
1833 else
1834 c->minax = c->maxax = c->minay = c->maxay = 0;
1835 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1836 && c->maxw == c->minw && c->maxh == c->minh);
1837 }
1838
1839 void
1840 updatetitle(Client *c) {
1841 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1842 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1843 }
1844
1845 void
1846 updatewmhints(Client *c) {
1847 XWMHints *wmh;
1848
1849 if((wmh = XGetWMHints(dpy, c->win))) {
1850 if(c == sel)
1851 sel->isurgent = False;
1852 else
1853 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1854 XFree(wmh);
1855 }
1856 }
1857
1858
1859 void
1860 view(const char *arg) {
1861 unsigned int i;
1862
1863 for(i = 0; i < LENGTH(tags); i++)
1864 tmp[i] = (NULL == arg);
1865 tmp[idxoftag(arg)] = True;
1866
1867 if(memcmp(seltags, tmp, TAGSZ) != 0) {
1868 memcpy(prevtags, seltags, TAGSZ);
1869 memcpy(seltags, tmp, TAGSZ);
1870 arrange();
1871 }
1872 }
1873
1874 void
1875 viewprevtag(const char *arg) {
1876
1877 memcpy(tmp, seltags, TAGSZ);
1878 memcpy(seltags, prevtags, TAGSZ);
1879 memcpy(prevtags, tmp, TAGSZ);
1880 arrange();
1881 }
1882
1883 /* There's no way to check accesses to destroyed windows, thus those cases are
1884 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1885 * default error handler, which may call exit. */
1886 int
1887 xerror(Display *dpy, XErrorEvent *ee) {
1888 if(ee->error_code == BadWindow
1889 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1890 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1891 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1892 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1893 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1894 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1895 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1896 return 0;
1897 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1898 ee->request_code, ee->error_code);
1899 return xerrorxlib(dpy, ee); /* may call exit */
1900 }
1901
1902 int
1903 xerrordummy(Display *dpy, XErrorEvent *ee) {
1904 return 0;
1905 }
1906
1907 /* Startup Error handler to check if another window manager
1908 * is already running. */
1909 int
1910 xerrorstart(Display *dpy, XErrorEvent *ee) {
1911 otherwm = True;
1912 return -1;
1913 }
1914
1915 void
1916 zoom(const char *arg) {
1917 Client *c = sel;
1918
1919 if(!sel || lt->isfloating || sel->isfloating)
1920 return;
1921 if(c == nexttiled(clients))
1922 if(!(c = nexttiled(c->next)))
1923 return;
1924 detach(c);
1925 attach(c);
1926 focus(c);
1927 arrange();
1928 }
1929
1930 int
1931 main(int argc, char *argv[]) {
1932 if(argc == 2 && !strcmp("-v", argv[1]))
1933 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1934 else if(argc != 1)
1935 eprint("usage: dwm [-v]\n");
1936
1937 setlocale(LC_CTYPE, "");
1938 if(!(dpy = XOpenDisplay(0)))
1939 eprint("dwm: cannot open display\n");
1940
1941 checkotherwm();
1942 setup();
1943 scan();
1944 run();
1945 cleanup();
1946
1947 XCloseDisplay(dpy);
1948 return 0;
1949 }