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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 MAX(a, b) ((a) > (b) ? (a) : (b))
45 #define MIN(a, b) ((a) < (b) ? (a) : (b))
46 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
47 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
48 #define LENGTH(x) (sizeof x / sizeof x[0])
49 #define MAXTAGLEN 16
50 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
51
52 /* enums */
53 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
54 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
55 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
56 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
57
58 /* typedefs */
59 typedef struct Client Client;
60 struct Client {
61 char name[256];
62 int x, y, w, h;
63 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
64 int minax, maxax, minay, maxay;
65 long flags;
66 unsigned int bw, oldbw;
67 Bool isbanned, isfixed, isfloating, isurgent;
68 Bool *tags;
69 Client *next;
70 Client *prev;
71 Client *snext;
72 Window win;
73 };
74
75 typedef struct {
76 int x, y, w, h;
77 unsigned long norm[ColLast];
78 unsigned long sel[ColLast];
79 Drawable drawable;
80 GC gc;
81 struct {
82 int ascent;
83 int descent;
84 int height;
85 XFontSet set;
86 XFontStruct *xfont;
87 } font;
88 } DC; /* draw context */
89
90 typedef struct {
91 unsigned long mod;
92 KeySym keysym;
93 void (*func)(const char *arg);
94 const char *arg;
95 } Key;
96
97 typedef struct {
98 const char *symbol;
99 void (*arrange)(void);
100 void (*updategeom)(void);
101 } Layout;
102
103 typedef struct {
104 const char *class;
105 const char *instance;
106 const char *title;
107 const char *tag;
108 Bool isfloating;
109 } Rule;
110
111 /* function declarations */
112 void applyrules(Client *c);
113 void arrange(void);
114 void attach(Client *c);
115 void attachstack(Client *c);
116 void ban(Client *c);
117 void buttonpress(XEvent *e);
118 void checkotherwm(void);
119 void cleanup(void);
120 void configure(Client *c);
121 void configurenotify(XEvent *e);
122 void configurerequest(XEvent *e);
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 focus(Client *c);
134 void focusin(XEvent *e);
135 void focusnext(const char *arg);
136 void focusprev(const char *arg);
137 Client *getclient(Window w);
138 unsigned long getcolor(const char *colstr);
139 long getstate(Window w);
140 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
141 void grabbuttons(Client *c, Bool focused);
142 void grabkeys(void);
143 unsigned int idxoftag(const char *t);
144 void initfont(const char *fontstr);
145 Bool isoccupied(unsigned int t);
146 Bool isprotodel(Client *c);
147 Bool isurgent(unsigned int t);
148 Bool isvisible(Client *c);
149 void keypress(XEvent *e);
150 void killclient(const char *arg);
151 void manage(Window w, XWindowAttributes *wa);
152 void mappingnotify(XEvent *e);
153 void maprequest(XEvent *e);
154 void monocle(void);
155 void movemouse(Client *c);
156 Client *nextunfloating(Client *c);
157 void propertynotify(XEvent *e);
158 void quit(const char *arg);
159 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
160 void resizemouse(Client *c);
161 void restack(void);
162 void run(void);
163 void scan(void);
164 void setclientstate(Client *c, long state);
165 void setup(void);
166 void spawn(const char *arg);
167 void tag(const char *arg);
168 unsigned int textnw(const char *text, unsigned int len);
169 unsigned int textw(const char *text);
170 void togglefloating(const char *arg);
171 void togglelayout(const char *arg);
172 void toggletag(const char *arg);
173 void toggleview(const char *arg);
174 void unban(Client *c);
175 void unmanage(Client *c);
176 void unmapnotify(XEvent *e);
177 void updatebar(void);
178 void updategeom(void);
179 void updatesizehints(Client *c);
180 void updatetitle(Client *c);
181 void updatewmhints(Client *c);
182 void view(const char *arg);
183 void viewprevtag(const char *arg); /* views previous selected tags */
184 int xerror(Display *dpy, XErrorEvent *ee);
185 int xerrordummy(Display *dpy, XErrorEvent *ee);
186 int xerrorstart(Display *dpy, XErrorEvent *ee);
187 void zoom(const char *arg);
188
189 /* variables */
190 char stext[256];
191 int screen, sx, sy, sw, sh;
192 int (*xerrorxlib)(Display *, XErrorEvent *);
193 int bx, by, bw, bh, blw, wx, wy, ww, wh;
194 int seltags = 0;
195 unsigned int numlockmask = 0;
196 void (*handler[LASTEvent]) (XEvent *) = {
197 [ButtonPress] = buttonpress,
198 [ConfigureRequest] = configurerequest,
199 [ConfigureNotify] = configurenotify,
200 [DestroyNotify] = destroynotify,
201 [EnterNotify] = enternotify,
202 [Expose] = expose,
203 [FocusIn] = focusin,
204 [KeyPress] = keypress,
205 [MappingNotify] = mappingnotify,
206 [MapRequest] = maprequest,
207 [PropertyNotify] = propertynotify,
208 [UnmapNotify] = unmapnotify
209 };
210 Atom wmatom[WMLast], netatom[NetLast];
211 Bool otherwm, readin;
212 Bool running = True;
213 Bool *tagset[2];
214 Client *clients = NULL;
215 Client *sel = NULL;
216 Client *stack = NULL;
217 Cursor cursor[CurLast];
218 Display *dpy;
219 DC dc = {0};
220 Layout layouts[];
221 Layout *lt = layouts;
222 Window root, barwin;
223
224 /* configuration, allows nested code to access above variables */
225 #include "config.h"
226 #define TAGSZ (LENGTH(tags) * sizeof(Bool))
227
228 /* function implementations */
229
230 void
231 applyrules(Client *c) {
232 unsigned int i;
233 Bool matched = False;
234 Rule *r;
235 XClassHint ch = { 0 };
236
237 /* rule matching */
238 XGetClassHint(dpy, c->win, &ch);
239 for(i = 0; i < LENGTH(rules); i++) {
240 r = &rules[i];
241 if((!r->title || strstr(c->name, r->title))
242 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
243 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
244 c->isfloating = r->isfloating;
245 if(r->tag) {
246 c->tags[idxoftag(r->tag)] = True;
247 matched = True;
248 }
249 }
250 }
251 if(ch.res_class)
252 XFree(ch.res_class);
253 if(ch.res_name)
254 XFree(ch.res_name);
255 if(!matched)
256 memcpy(c->tags, tagset[seltags], TAGSZ);
257 }
258
259 void
260 arrange(void) {
261 Client *c;
262
263 for(c = clients; c; c = c->next)
264 if(isvisible(c)) {
265 unban(c);
266 if(!lt->arrange || c->isfloating)
267 resize(c, c->x, c->y, c->w, c->h, True);
268 }
269 else
270 ban(c);
271
272 focus(NULL);
273 if(lt->arrange)
274 lt->arrange();
275 restack();
276 }
277
278 void
279 attach(Client *c) {
280 if(clients)
281 clients->prev = c;
282 c->next = clients;
283 clients = c;
284 }
285
286 void
287 attachstack(Client *c) {
288 c->snext = stack;
289 stack = c;
290 }
291
292 void
293 ban(Client *c) {
294 if(c->isbanned)
295 return;
296 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
297 c->isbanned = True;
298 }
299
300 void
301 buttonpress(XEvent *e) {
302 unsigned int i, x;
303 Client *c;
304 XButtonPressedEvent *ev = &e->xbutton;
305
306 if(ev->window == barwin) {
307 x = 0;
308 for(i = 0; i < LENGTH(tags); i++) {
309 x += textw(tags[i]);
310 if(ev->x < x) {
311 if(ev->button == Button1) {
312 if(ev->state & MODKEY)
313 tag(tags[i]);
314 else
315 view(tags[i]);
316 }
317 else if(ev->button == Button3) {
318 if(ev->state & MODKEY)
319 toggletag(tags[i]);
320 else
321 toggleview(tags[i]);
322 }
323 return;
324 }
325 }
326 if((ev->x < x + blw) && ev->button == Button1)
327 togglelayout(NULL);
328 }
329 else if((c = getclient(ev->window))) {
330 focus(c);
331 if(CLEANMASK(ev->state) != MODKEY)
332 return;
333 if(ev->button == Button1) {
334 restack();
335 movemouse(c);
336 }
337 else if(ev->button == Button2) {
338 if(lt->arrange && c->isfloating)
339 togglefloating(NULL);
340 else
341 zoom(NULL);
342 }
343 else if(ev->button == Button3 && !c->isfixed) {
344 restack();
345 resizemouse(c);
346 }
347 }
348 }
349
350 void
351 checkotherwm(void) {
352 otherwm = False;
353 XSetErrorHandler(xerrorstart);
354
355 /* this causes an error if some other window manager is running */
356 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
357 XSync(dpy, False);
358 if(otherwm)
359 eprint("dwm: another window manager is already running\n");
360 XSync(dpy, False);
361 XSetErrorHandler(NULL);
362 xerrorxlib = XSetErrorHandler(xerror);
363 XSync(dpy, False);
364 }
365
366 void
367 cleanup(void) {
368 close(STDIN_FILENO);
369 while(stack) {
370 unban(stack);
371 unmanage(stack);
372 }
373 if(dc.font.set)
374 XFreeFontSet(dpy, dc.font.set);
375 else
376 XFreeFont(dpy, dc.font.xfont);
377 XUngrabKey(dpy, AnyKey, AnyModifier, root);
378 XFreePixmap(dpy, dc.drawable);
379 XFreeGC(dpy, dc.gc);
380 XFreeCursor(dpy, cursor[CurNormal]);
381 XFreeCursor(dpy, cursor[CurResize]);
382 XFreeCursor(dpy, cursor[CurMove]);
383 XDestroyWindow(dpy, barwin);
384 XSync(dpy, False);
385 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
386 }
387
388 void
389 configure(Client *c) {
390 XConfigureEvent ce;
391
392 ce.type = ConfigureNotify;
393 ce.display = dpy;
394 ce.event = c->win;
395 ce.window = c->win;
396 ce.x = c->x;
397 ce.y = c->y;
398 ce.width = c->w;
399 ce.height = c->h;
400 ce.border_width = c->bw;
401 ce.above = None;
402 ce.override_redirect = False;
403 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
404 }
405
406 void
407 configurenotify(XEvent *e) {
408 XConfigureEvent *ev = &e->xconfigure;
409
410 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
411 sw = ev->width;
412 sh = ev->height;
413 updategeom();
414 updatebar();
415 arrange();
416 }
417 }
418
419 void
420 configurerequest(XEvent *e) {
421 Client *c;
422 XConfigureRequestEvent *ev = &e->xconfigurerequest;
423 XWindowChanges wc;
424
425 if((c = getclient(ev->window))) {
426 if(ev->value_mask & CWBorderWidth)
427 c->bw = ev->border_width;
428 if(c->isfixed || c->isfloating || !lt->arrange) {
429 if(ev->value_mask & CWX)
430 c->x = sx + ev->x;
431 if(ev->value_mask & CWY)
432 c->y = sy + ev->y;
433 if(ev->value_mask & CWWidth)
434 c->w = ev->width;
435 if(ev->value_mask & CWHeight)
436 c->h = ev->height;
437 if((c->x - sx + c->w) > sw && c->isfloating)
438 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
439 if((c->y - sy + c->h) > sh && c->isfloating)
440 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
441 if((ev->value_mask & (CWX|CWY))
442 && !(ev->value_mask & (CWWidth|CWHeight)))
443 configure(c);
444 if(isvisible(c))
445 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
446 }
447 else
448 configure(c);
449 }
450 else {
451 wc.x = ev->x;
452 wc.y = ev->y;
453 wc.width = ev->width;
454 wc.height = ev->height;
455 wc.border_width = ev->border_width;
456 wc.sibling = ev->above;
457 wc.stack_mode = ev->detail;
458 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
459 }
460 XSync(dpy, False);
461 }
462
463 void
464 destroynotify(XEvent *e) {
465 Client *c;
466 XDestroyWindowEvent *ev = &e->xdestroywindow;
467
468 if((c = getclient(ev->window)))
469 unmanage(c);
470 }
471
472 void
473 detach(Client *c) {
474 if(c->prev)
475 c->prev->next = c->next;
476 if(c->next)
477 c->next->prev = c->prev;
478 if(c == clients)
479 clients = c->next;
480 c->next = c->prev = NULL;
481 }
482
483 void
484 detachstack(Client *c) {
485 Client **tc;
486
487 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
488 *tc = c->snext;
489 }
490
491 void
492 drawbar(void) {
493 int i, x;
494 Client *c;
495
496 dc.x = 0;
497 for(c = stack; c && !isvisible(c); c = c->snext);
498 for(i = 0; i < LENGTH(tags); i++) {
499 dc.w = textw(tags[i]);
500 if(tagset[seltags][i]) {
501 drawtext(tags[i], dc.sel, isurgent(i));
502 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
503 }
504 else {
505 drawtext(tags[i], dc.norm, isurgent(i));
506 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
507 }
508 dc.x += dc.w;
509 }
510 if(blw > 0) {
511 dc.w = blw;
512 drawtext(lt->symbol, dc.norm, False);
513 x = dc.x + dc.w;
514 }
515 else
516 x = dc.x;
517 dc.w = textw(stext);
518 dc.x = bw - dc.w;
519 if(dc.x < x) {
520 dc.x = x;
521 dc.w = bw - x;
522 }
523 drawtext(stext, dc.norm, False);
524 if((dc.w = dc.x - x) > bh) {
525 dc.x = x;
526 if(c) {
527 drawtext(c->name, dc.sel, False);
528 drawsquare(False, c->isfloating, False, dc.sel);
529 }
530 else
531 drawtext(NULL, dc.norm, False);
532 }
533 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
534 XSync(dpy, False);
535 }
536
537 void
538 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
539 int x;
540 XGCValues gcv;
541 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
542
543 gcv.foreground = col[invert ? ColBG : ColFG];
544 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
545 x = (dc.font.ascent + dc.font.descent + 2) / 4;
546 r.x = dc.x + 1;
547 r.y = dc.y + 1;
548 if(filled) {
549 r.width = r.height = x + 1;
550 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
551 }
552 else if(empty) {
553 r.width = r.height = x;
554 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
555 }
556 }
557
558 void
559 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
560 int x, y, w, h;
561 unsigned int len, olen;
562 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
563 char buf[256];
564
565 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
566 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
567 if(!text)
568 return;
569 olen = strlen(text);
570 len = MIN(olen, sizeof buf);
571 memcpy(buf, text, len);
572 w = 0;
573 h = dc.font.ascent + dc.font.descent;
574 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
575 x = dc.x + (h / 2);
576 /* shorten text if necessary */
577 for(; len && (w = textnw(buf, len)) > dc.w - h; len--);
578 if(!len)
579 return;
580 if(len < olen) {
581 if(len > 1)
582 buf[len - 1] = '.';
583 if(len > 2)
584 buf[len - 2] = '.';
585 if(len > 3)
586 buf[len - 3] = '.';
587 }
588 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
589 if(dc.font.set)
590 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
591 else
592 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
593 }
594
595 void *
596 emallocz(unsigned int size) {
597 void *res = calloc(1, size);
598
599 if(!res)
600 eprint("fatal: could not malloc() %u bytes\n", size);
601 return res;
602 }
603
604 void
605 enternotify(XEvent *e) {
606 Client *c;
607 XCrossingEvent *ev = &e->xcrossing;
608
609 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
610 return;
611 if((c = getclient(ev->window)))
612 focus(c);
613 else
614 focus(NULL);
615 }
616
617 void
618 eprint(const char *errstr, ...) {
619 va_list ap;
620
621 va_start(ap, errstr);
622 vfprintf(stderr, errstr, ap);
623 va_end(ap);
624 exit(EXIT_FAILURE);
625 }
626
627 void
628 expose(XEvent *e) {
629 XExposeEvent *ev = &e->xexpose;
630
631 if(ev->count == 0 && (ev->window == barwin))
632 drawbar();
633 }
634
635 void
636 focus(Client *c) {
637 if(!c || (c && !isvisible(c)))
638 for(c = stack; c && !isvisible(c); c = c->snext);
639 if(sel && sel != c) {
640 grabbuttons(sel, False);
641 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
642 }
643 if(c) {
644 detachstack(c);
645 attachstack(c);
646 grabbuttons(c, True);
647 }
648 sel = c;
649 if(c) {
650 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
651 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
652 }
653 else
654 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
655 drawbar();
656 }
657
658 void
659 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
660 XFocusChangeEvent *ev = &e->xfocus;
661
662 if(sel && ev->window != sel->win)
663 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
664 }
665
666 void
667 focusnext(const char *arg) {
668 Client *c;
669
670 if(!sel)
671 return;
672 for(c = sel->next; c && !isvisible(c); c = c->next);
673 if(!c)
674 for(c = clients; c && !isvisible(c); c = c->next);
675 if(c) {
676 focus(c);
677 restack();
678 }
679 }
680
681 void
682 focusprev(const char *arg) {
683 Client *c;
684
685 if(!sel)
686 return;
687 for(c = sel->prev; c && !isvisible(c); c = c->prev);
688 if(!c) {
689 for(c = clients; c && c->next; c = c->next);
690 for(; c && !isvisible(c); c = c->prev);
691 }
692 if(c) {
693 focus(c);
694 restack();
695 }
696 }
697
698 Client *
699 getclient(Window w) {
700 Client *c;
701
702 for(c = clients; c && c->win != w; c = c->next);
703 return c;
704 }
705
706 unsigned long
707 getcolor(const char *colstr) {
708 Colormap cmap = DefaultColormap(dpy, screen);
709 XColor color;
710
711 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
712 eprint("error, cannot allocate color '%s'\n", colstr);
713 return color.pixel;
714 }
715
716 long
717 getstate(Window w) {
718 int format, status;
719 long result = -1;
720 unsigned char *p = NULL;
721 unsigned long n, extra;
722 Atom real;
723
724 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
725 &real, &format, &n, &extra, (unsigned char **)&p);
726 if(status != Success)
727 return -1;
728 if(n != 0)
729 result = *p;
730 XFree(p);
731 return result;
732 }
733
734 Bool
735 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
736 char **list = NULL;
737 int n;
738 XTextProperty name;
739
740 if(!text || size == 0)
741 return False;
742 text[0] = '\0';
743 XGetTextProperty(dpy, w, &name, atom);
744 if(!name.nitems)
745 return False;
746 if(name.encoding == XA_STRING)
747 strncpy(text, (char *)name.value, size - 1);
748 else {
749 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
750 && n > 0 && *list) {
751 strncpy(text, *list, size - 1);
752 XFreeStringList(list);
753 }
754 }
755 text[size - 1] = '\0';
756 XFree(name.value);
757 return True;
758 }
759
760 void
761 grabbuttons(Client *c, Bool focused) {
762 int i, j;
763 unsigned int buttons[] = { Button1, Button2, Button3 };
764 unsigned int modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask,
765 MODKEY|numlockmask|LockMask} ;
766
767 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
768 if(focused)
769 for(i = 0; i < LENGTH(buttons); i++)
770 for(j = 0; j < LENGTH(modifiers); j++)
771 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
772 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
773 else
774 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
775 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
776 }
777
778 void
779 grabkeys(void) {
780 unsigned int i, j;
781 KeyCode code;
782 XModifierKeymap *modmap;
783
784 /* init modifier map */
785 modmap = XGetModifierMapping(dpy);
786 for(i = 0; i < 8; i++)
787 for(j = 0; j < modmap->max_keypermod; j++) {
788 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
789 numlockmask = (1 << i);
790 }
791 XFreeModifiermap(modmap);
792
793 XUngrabKey(dpy, AnyKey, AnyModifier, root);
794 for(i = 0; i < LENGTH(keys); i++) {
795 code = XKeysymToKeycode(dpy, keys[i].keysym);
796 XGrabKey(dpy, code, keys[i].mod, root, True,
797 GrabModeAsync, GrabModeAsync);
798 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
799 GrabModeAsync, GrabModeAsync);
800 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
801 GrabModeAsync, GrabModeAsync);
802 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
803 GrabModeAsync, GrabModeAsync);
804 }
805 }
806
807 unsigned int
808 idxoftag(const char *t) {
809 unsigned int i;
810
811 for(i = 0; (i < LENGTH(tags)) && t && strcmp(tags[i], t); i++);
812 return (i < LENGTH(tags)) ? i : 0;
813 }
814
815 void
816 initfont(const char *fontstr) {
817 char *def, **missing;
818 int i, n;
819
820 missing = NULL;
821 if(dc.font.set)
822 XFreeFontSet(dpy, dc.font.set);
823 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
824 if(missing) {
825 while(n--)
826 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
827 XFreeStringList(missing);
828 }
829 if(dc.font.set) {
830 XFontSetExtents *font_extents;
831 XFontStruct **xfonts;
832 char **font_names;
833 dc.font.ascent = dc.font.descent = 0;
834 font_extents = XExtentsOfFontSet(dc.font.set);
835 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
836 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
837 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
838 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
839 xfonts++;
840 }
841 }
842 else {
843 if(dc.font.xfont)
844 XFreeFont(dpy, dc.font.xfont);
845 dc.font.xfont = NULL;
846 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
847 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
848 eprint("error, cannot load font: '%s'\n", fontstr);
849 dc.font.ascent = dc.font.xfont->ascent;
850 dc.font.descent = dc.font.xfont->descent;
851 }
852 dc.font.height = dc.font.ascent + dc.font.descent;
853 }
854
855 Bool
856 isoccupied(unsigned int t) {
857 Client *c;
858
859 for(c = clients; c; c = c->next)
860 if(c->tags[t])
861 return True;
862 return False;
863 }
864
865 Bool
866 isprotodel(Client *c) {
867 int i, n;
868 Atom *protocols;
869 Bool ret = False;
870
871 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
872 for(i = 0; !ret && i < n; i++)
873 if(protocols[i] == wmatom[WMDelete])
874 ret = True;
875 XFree(protocols);
876 }
877 return ret;
878 }
879
880 Bool
881 isurgent(unsigned int t) {
882 Client *c;
883
884 for(c = clients; c; c = c->next)
885 if(c->isurgent && c->tags[t])
886 return True;
887 return False;
888 }
889
890 Bool
891 isvisible(Client *c) {
892 unsigned int i;
893
894 for(i = 0; i < LENGTH(tags); i++)
895 if(c->tags[i] && tagset[seltags][i])
896 return True;
897 return False;
898 }
899
900 void
901 keypress(XEvent *e) {
902 unsigned int i;
903 KeySym keysym;
904 XKeyEvent *ev;
905
906 ev = &e->xkey;
907 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
908 for(i = 0; i < LENGTH(keys); i++)
909 if(keysym == keys[i].keysym
910 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
911 {
912 if(keys[i].func)
913 keys[i].func(keys[i].arg);
914 }
915 }
916
917 void
918 killclient(const char *arg) {
919 XEvent ev;
920
921 if(!sel)
922 return;
923 if(isprotodel(sel)) {
924 ev.type = ClientMessage;
925 ev.xclient.window = sel->win;
926 ev.xclient.message_type = wmatom[WMProtocols];
927 ev.xclient.format = 32;
928 ev.xclient.data.l[0] = wmatom[WMDelete];
929 ev.xclient.data.l[1] = CurrentTime;
930 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
931 }
932 else
933 XKillClient(dpy, sel->win);
934 }
935
936 void
937 manage(Window w, XWindowAttributes *wa) {
938 Client *c, *t = NULL;
939 Status rettrans;
940 Window trans;
941 XWindowChanges wc;
942
943 c = emallocz(sizeof(Client));
944 c->tags = emallocz(TAGSZ);
945 c->win = w;
946
947 /* geometry */
948 c->x = wa->x;
949 c->y = wa->y;
950 c->w = wa->width;
951 c->h = wa->height;
952 c->oldbw = wa->border_width;
953 if(c->w == sw && c->h == sh) {
954 c->x = sx;
955 c->y = sy;
956 c->bw = wa->border_width;
957 }
958 else {
959 if(c->x + c->w + 2 * c->bw > wx + ww)
960 c->x = wx + ww - c->w - 2 * c->bw;
961 if(c->y + c->h + 2 * c->bw > wy + wh)
962 c->y = wy + wh - c->h - 2 * c->bw;
963 c->x = MAX(c->x, wx);
964 c->y = MAX(c->y, wy);
965 c->bw = BORDERPX;
966 }
967
968 wc.border_width = c->bw;
969 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
970 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
971 configure(c); /* propagates border_width, if size doesn't change */
972 updatesizehints(c);
973 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
974 grabbuttons(c, False);
975 updatetitle(c);
976 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
977 for(t = clients; t && t->win != trans; t = t->next);
978 if(t)
979 memcpy(c->tags, t->tags, TAGSZ);
980 else
981 applyrules(c);
982 if(!c->isfloating)
983 c->isfloating = (rettrans == Success) || c->isfixed;
984 attach(c);
985 attachstack(c);
986 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
987 ban(c);
988 XMapWindow(dpy, c->win);
989 setclientstate(c, NormalState);
990 arrange();
991 }
992
993 void
994 mappingnotify(XEvent *e) {
995 XMappingEvent *ev = &e->xmapping;
996
997 XRefreshKeyboardMapping(ev);
998 if(ev->request == MappingKeyboard)
999 grabkeys();
1000 }
1001
1002 void
1003 maprequest(XEvent *e) {
1004 static XWindowAttributes wa;
1005 XMapRequestEvent *ev = &e->xmaprequest;
1006
1007 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1008 return;
1009 if(wa.override_redirect)
1010 return;
1011 if(!getclient(ev->window))
1012 manage(ev->window, &wa);
1013 }
1014
1015 void
1016 monocle(void) {
1017 Client *c;
1018
1019 for(c = clients; c; c = c->next)
1020 if(!c->isfloating && isvisible(c))
1021 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, RESIZEHINTS);
1022 }
1023
1024 void
1025 movemouse(Client *c) {
1026 int x1, y1, ocx, ocy, di, nx, ny;
1027 unsigned int dui;
1028 Window dummy;
1029 XEvent ev;
1030
1031 ocx = nx = c->x;
1032 ocy = ny = c->y;
1033 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1034 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1035 return;
1036 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1037 for(;;) {
1038 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1039 switch (ev.type) {
1040 case ButtonRelease:
1041 XUngrabPointer(dpy, CurrentTime);
1042 return;
1043 case ConfigureRequest:
1044 case Expose:
1045 case MapRequest:
1046 handler[ev.type](&ev);
1047 break;
1048 case MotionNotify:
1049 XSync(dpy, False);
1050 nx = ocx + (ev.xmotion.x - x1);
1051 ny = ocy + (ev.xmotion.y - y1);
1052 if(abs(wx - nx) < SNAP)
1053 nx = wx;
1054 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < SNAP)
1055 nx = wx + ww - c->w - 2 * c->bw;
1056 if(abs(wy - ny) < SNAP)
1057 ny = wy;
1058 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < SNAP)
1059 ny = wy + wh - c->h - 2 * c->bw;
1060 if(!c->isfloating && lt->arrange && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1061 togglefloating(NULL);
1062 if(!lt->arrange || c->isfloating)
1063 resize(c, nx, ny, c->w, c->h, False);
1064 break;
1065 }
1066 }
1067 }
1068
1069 Client *
1070 nextunfloating(Client *c) {
1071 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1072 return c;
1073 }
1074
1075 void
1076 propertynotify(XEvent *e) {
1077 Client *c;
1078 Window trans;
1079 XPropertyEvent *ev = &e->xproperty;
1080
1081 if(ev->state == PropertyDelete)
1082 return; /* ignore */
1083 if((c = getclient(ev->window))) {
1084 switch (ev->atom) {
1085 default: break;
1086 case XA_WM_TRANSIENT_FOR:
1087 XGetTransientForHint(dpy, c->win, &trans);
1088 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1089 arrange();
1090 break;
1091 case XA_WM_NORMAL_HINTS:
1092 updatesizehints(c);
1093 break;
1094 case XA_WM_HINTS:
1095 updatewmhints(c);
1096 drawbar();
1097 break;
1098 }
1099 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1100 updatetitle(c);
1101 if(c == sel)
1102 drawbar();
1103 }
1104 }
1105 }
1106
1107 void
1108 quit(const char *arg) {
1109 readin = running = False;
1110 }
1111
1112 void
1113 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1114 XWindowChanges wc;
1115
1116 if(sizehints) {
1117 /* set minimum possible */
1118 w = MAX(1, w);
1119 h = MAX(1, h);
1120
1121 /* temporarily remove base dimensions */
1122 w -= c->basew;
1123 h -= c->baseh;
1124
1125 /* adjust for aspect limits */
1126 if(c->minax != c->maxax && c->minay != c->maxay
1127 && c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0) {
1128 if(w * c->maxay > h * c->maxax)
1129 w = h * c->maxax / c->maxay;
1130 else if(w * c->minay < h * c->minax)
1131 h = w * c->minay / c->minax;
1132 }
1133
1134 /* adjust for increment value */
1135 if(c->incw)
1136 w -= w % c->incw;
1137 if(c->inch)
1138 h -= h % c->inch;
1139
1140 /* restore base dimensions */
1141 w += c->basew;
1142 h += c->baseh;
1143
1144 w = MAX(w, c->minw);
1145 h = MAX(h, c->minh);
1146
1147 if (c->maxw)
1148 w = MIN(w, c->maxw);
1149
1150 if (c->maxh)
1151 h = MIN(h, c->maxh);
1152 }
1153 if(w <= 0 || h <= 0)
1154 return;
1155 if(x > sx + sw)
1156 x = sw - w - 2 * c->bw;
1157 if(y > sy + sh)
1158 y = sh - h - 2 * c->bw;
1159 if(x + w + 2 * c->bw < sx)
1160 x = sx;
1161 if(y + h + 2 * c->bw < sy)
1162 y = sy;
1163 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1164 c->x = wc.x = x;
1165 c->y = wc.y = y;
1166 c->w = wc.width = w;
1167 c->h = wc.height = h;
1168 wc.border_width = c->bw;
1169 XConfigureWindow(dpy, c->win,
1170 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1171 configure(c);
1172 XSync(dpy, False);
1173 }
1174 }
1175
1176 void
1177 resizemouse(Client *c) {
1178 int ocx, ocy;
1179 int nw, nh;
1180 XEvent ev;
1181
1182 ocx = c->x;
1183 ocy = c->y;
1184 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1185 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1186 return;
1187 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1188 for(;;) {
1189 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1190 switch(ev.type) {
1191 case ButtonRelease:
1192 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1193 c->w + c->bw - 1, c->h + c->bw - 1);
1194 XUngrabPointer(dpy, CurrentTime);
1195 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1196 return;
1197 case ConfigureRequest:
1198 case Expose:
1199 case MapRequest:
1200 handler[ev.type](&ev);
1201 break;
1202 case MotionNotify:
1203 XSync(dpy, False);
1204 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1205 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1206 if(!c->isfloating && lt->arrange && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP)) {
1207 togglefloating(NULL);
1208 }
1209 if(!lt->arrange || c->isfloating)
1210 resize(c, c->x, c->y, nw, nh, True);
1211 break;
1212 }
1213 }
1214 }
1215
1216 void
1217 restack(void) {
1218 Client *c;
1219 XEvent ev;
1220 XWindowChanges wc;
1221
1222 drawbar();
1223 if(!sel)
1224 return;
1225 if(sel->isfloating || !lt->arrange)
1226 XRaiseWindow(dpy, sel->win);
1227 if(lt->arrange) {
1228 wc.stack_mode = Below;
1229 wc.sibling = barwin;
1230 for(c = stack; c; c = c->snext)
1231 if(!c->isfloating && isvisible(c)) {
1232 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1233 wc.sibling = c->win;
1234 }
1235 }
1236 XSync(dpy, False);
1237 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1238 }
1239
1240 void
1241 run(void) {
1242 char *p;
1243 char sbuf[sizeof stext];
1244 fd_set rd;
1245 int r, xfd;
1246 unsigned int len, offset;
1247 XEvent ev;
1248
1249 /* main event loop, also reads status text from stdin */
1250 XSync(dpy, False);
1251 xfd = ConnectionNumber(dpy);
1252 readin = True;
1253 offset = 0;
1254 len = sizeof stext - 1;
1255 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1256 while(running) {
1257 FD_ZERO(&rd);
1258 if(readin)
1259 FD_SET(STDIN_FILENO, &rd);
1260 FD_SET(xfd, &rd);
1261 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1262 if(errno == EINTR)
1263 continue;
1264 eprint("select failed\n");
1265 }
1266 if(FD_ISSET(STDIN_FILENO, &rd)) {
1267 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1268 case -1:
1269 strncpy(stext, strerror(errno), len);
1270 readin = False;
1271 break;
1272 case 0:
1273 strncpy(stext, "EOF", 4);
1274 readin = False;
1275 break;
1276 default:
1277 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1278 if(*p == '\n' || *p == '\0') {
1279 *p = '\0';
1280 strncpy(stext, sbuf, len);
1281 p += r - 1; /* p is sbuf + offset + r - 1 */
1282 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1283 offset = r;
1284 if(r)
1285 memmove(sbuf, p - r + 1, r);
1286 break;
1287 }
1288 break;
1289 }
1290 drawbar();
1291 }
1292 while(XPending(dpy)) {
1293 XNextEvent(dpy, &ev);
1294 if(handler[ev.type])
1295 (handler[ev.type])(&ev); /* call handler */
1296 }
1297 }
1298 }
1299
1300 void
1301 scan(void) {
1302 unsigned int i, num;
1303 Window *wins, d1, d2;
1304 XWindowAttributes wa;
1305
1306 wins = NULL;
1307 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1308 for(i = 0; i < num; i++) {
1309 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1310 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1311 continue;
1312 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1313 manage(wins[i], &wa);
1314 }
1315 for(i = 0; i < num; i++) { /* now the transients */
1316 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1317 continue;
1318 if(XGetTransientForHint(dpy, wins[i], &d1)
1319 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1320 manage(wins[i], &wa);
1321 }
1322 }
1323 if(wins)
1324 XFree(wins);
1325 }
1326
1327 void
1328 setclientstate(Client *c, long state) {
1329 long data[] = {state, None};
1330
1331 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1332 PropModeReplace, (unsigned char *)data, 2);
1333 }
1334
1335 void
1336 setup(void) {
1337 unsigned int i, w;
1338 XSetWindowAttributes wa;
1339
1340 /* init screen */
1341 screen = DefaultScreen(dpy);
1342 root = RootWindow(dpy, screen);
1343 initfont(FONT);
1344 sx = 0;
1345 sy = 0;
1346 sw = DisplayWidth(dpy, screen);
1347 sh = DisplayHeight(dpy, screen);
1348 bh = dc.font.height + 2;
1349 updategeom();
1350
1351 /* init atoms */
1352 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1353 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1354 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1355 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1356 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1357 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1358
1359 /* init cursors */
1360 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1361 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1362 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1363
1364 /* init appearance */
1365 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1366 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1367 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1368 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1369 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1370 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1371 initfont(FONT);
1372 dc.h = bh;
1373 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1374 dc.gc = XCreateGC(dpy, root, 0, 0);
1375 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1376 if(!dc.font.set)
1377 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1378
1379 /* init tags */
1380 tagset[0] = emallocz(TAGSZ);
1381 tagset[1] = emallocz(TAGSZ);
1382 tagset[0][0] = tagset[1][0] = True;
1383
1384 /* init bar */
1385 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1386 w = textw(layouts[i].symbol);
1387 blw = MAX(blw, w);
1388 }
1389
1390 wa.override_redirect = 1;
1391 wa.background_pixmap = ParentRelative;
1392 wa.event_mask = ButtonPressMask|ExposureMask;
1393
1394 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1395 CopyFromParent, DefaultVisual(dpy, screen),
1396 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1397 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1398 XMapRaised(dpy, barwin);
1399 strcpy(stext, "dwm-"VERSION);
1400 drawbar();
1401
1402 /* EWMH support per view */
1403 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1404 PropModeReplace, (unsigned char *) netatom, NetLast);
1405
1406 /* select for events */
1407 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1408 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1409 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1410 XSelectInput(dpy, root, wa.event_mask);
1411
1412
1413 /* grab keys */
1414 grabkeys();
1415 }
1416
1417 void
1418 spawn(const char *arg) {
1419 static char *shell = NULL;
1420
1421 if(!shell && !(shell = getenv("SHELL")))
1422 shell = "/bin/sh";
1423 if(!arg)
1424 return;
1425 /* The double-fork construct avoids zombie processes and keeps the code
1426 * clean from stupid signal handlers. */
1427 if(fork() == 0) {
1428 if(fork() == 0) {
1429 if(dpy)
1430 close(ConnectionNumber(dpy));
1431 setsid();
1432 execl(shell, shell, "-c", arg, (char *)NULL);
1433 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1434 perror(" failed");
1435 }
1436 exit(0);
1437 }
1438 wait(0);
1439 }
1440
1441 void
1442 tag(const char *arg) {
1443 unsigned int i;
1444
1445 if(!sel)
1446 return;
1447 for(i = 0; i < LENGTH(tags); i++)
1448 sel->tags[i] = (arg == NULL);
1449 sel->tags[idxoftag(arg)] = True;
1450 arrange();
1451 }
1452
1453 unsigned int
1454 textnw(const char *text, unsigned int len) {
1455 XRectangle r;
1456
1457 if(dc.font.set) {
1458 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1459 return r.width;
1460 }
1461 return XTextWidth(dc.font.xfont, text, len);
1462 }
1463
1464 unsigned int
1465 textw(const char *text) {
1466 return textnw(text, strlen(text)) + dc.font.height;
1467 }
1468
1469 void
1470 togglefloating(const char *arg) {
1471 if(!sel)
1472 return;
1473 sel->isfloating = !sel->isfloating;
1474 if(sel->isfloating)
1475 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1476 arrange();
1477 }
1478
1479 void
1480 togglelayout(const char *arg) {
1481 unsigned int i;
1482
1483 if(!arg) {
1484 if(++lt == &layouts[LENGTH(layouts)])
1485 lt = &layouts[0];
1486 }
1487 else {
1488 for(i = 0; i < LENGTH(layouts); i++)
1489 if(!strcmp(arg, layouts[i].symbol))
1490 break;
1491 if(i == LENGTH(layouts))
1492 return;
1493 lt = &layouts[i];
1494 }
1495 if(sel)
1496 arrange();
1497 else
1498 drawbar();
1499 }
1500
1501 void
1502 toggletag(const char *arg) {
1503 unsigned int i, j;
1504
1505 if(!sel)
1506 return;
1507 i = idxoftag(arg);
1508 sel->tags[i] = !sel->tags[i];
1509 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1510 if(j == LENGTH(tags))
1511 sel->tags[i] = True; /* at least one tag must be enabled */
1512 arrange();
1513 }
1514
1515 void
1516 toggleview(const char *arg) {
1517 unsigned int i, j;
1518
1519 i = idxoftag(arg);
1520 tagset[seltags][i] = !tagset[seltags][i];
1521 for(j = 0; j < LENGTH(tags) && !tagset[seltags][j]; j++);
1522 if(j == LENGTH(tags))
1523 tagset[seltags][i] = True; /* at least one tag must be viewed */
1524 arrange();
1525 }
1526
1527 void
1528 unban(Client *c) {
1529 if(!c->isbanned)
1530 return;
1531 XMoveWindow(dpy, c->win, c->x, c->y);
1532 c->isbanned = False;
1533 }
1534
1535 void
1536 unmanage(Client *c) {
1537 XWindowChanges wc;
1538
1539 wc.border_width = c->oldbw;
1540 /* The server grab construct avoids race conditions. */
1541 XGrabServer(dpy);
1542 XSetErrorHandler(xerrordummy);
1543 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1544 detach(c);
1545 detachstack(c);
1546 if(sel == c)
1547 focus(NULL);
1548 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1549 setclientstate(c, WithdrawnState);
1550 free(c->tags);
1551 free(c);
1552 XSync(dpy, False);
1553 XSetErrorHandler(xerror);
1554 XUngrabServer(dpy);
1555 arrange();
1556 }
1557
1558 void
1559 unmapnotify(XEvent *e) {
1560 Client *c;
1561 XUnmapEvent *ev = &e->xunmap;
1562
1563 if((c = getclient(ev->window)))
1564 unmanage(c);
1565 }
1566
1567 void
1568 updatebar(void) {
1569 if(dc.drawable != 0)
1570 XFreePixmap(dpy, dc.drawable);
1571 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1572 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1573 }
1574
1575 void
1576 updategeom(void) {
1577 unsigned int i;
1578
1579 /* bar geometry */
1580 bx = 0;
1581 by = 0;
1582 bw = sw;
1583
1584 /* window area geometry */
1585 wx = sx;
1586 wy = sy + bh;
1587 ww = sw;
1588 wh = sh - bh;
1589
1590 /* update layout geometries */
1591 for(i = 0; i < LENGTH(layouts); i++)
1592 if(layouts[i].updategeom)
1593 layouts[i].updategeom();
1594 }
1595
1596 void
1597 updatesizehints(Client *c) {
1598 long msize;
1599 XSizeHints size;
1600
1601 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1602 size.flags = PSize;
1603 c->flags = size.flags;
1604 if(c->flags & PBaseSize) {
1605 c->basew = size.base_width;
1606 c->baseh = size.base_height;
1607 }
1608 else if(c->flags & PMinSize) {
1609 c->basew = size.min_width;
1610 c->baseh = size.min_height;
1611 }
1612 else
1613 c->basew = c->baseh = 0;
1614 if(c->flags & PResizeInc) {
1615 c->incw = size.width_inc;
1616 c->inch = size.height_inc;
1617 }
1618 else
1619 c->incw = c->inch = 0;
1620 if(c->flags & PMaxSize) {
1621 c->maxw = size.max_width;
1622 c->maxh = size.max_height;
1623 }
1624 else
1625 c->maxw = c->maxh = 0;
1626 if(c->flags & PMinSize) {
1627 c->minw = size.min_width;
1628 c->minh = size.min_height;
1629 }
1630 else if(c->flags & PBaseSize) {
1631 c->minw = size.base_width;
1632 c->minh = size.base_height;
1633 }
1634 else
1635 c->minw = c->minh = 0;
1636 if(c->flags & PAspect) {
1637 c->minax = size.min_aspect.x;
1638 c->maxax = size.max_aspect.x;
1639 c->minay = size.min_aspect.y;
1640 c->maxay = size.max_aspect.y;
1641 }
1642 else
1643 c->minax = c->maxax = c->minay = c->maxay = 0;
1644 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1645 && c->maxw == c->minw && c->maxh == c->minh);
1646 }
1647
1648 void
1649 updatetitle(Client *c) {
1650 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1651 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1652 }
1653
1654 void
1655 updatewmhints(Client *c) {
1656 XWMHints *wmh;
1657
1658 if((wmh = XGetWMHints(dpy, c->win))) {
1659 if(c == sel)
1660 sel->isurgent = False;
1661 else
1662 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1663 XFree(wmh);
1664 }
1665 }
1666
1667 void
1668 view(const char *arg) {
1669 seltags ^= 1; /* toggle sel tagset */
1670 memset(tagset[seltags], (NULL == arg), TAGSZ);
1671 tagset[seltags][idxoftag(arg)] = True;
1672 arrange();
1673 }
1674
1675 void
1676 viewprevtag(const char *arg) {
1677 seltags ^= 1; /* toggle sel tagset */
1678 arrange();
1679 }
1680
1681 /* There's no way to check accesses to destroyed windows, thus those cases are
1682 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1683 * default error handler, which may call exit. */
1684 int
1685 xerror(Display *dpy, XErrorEvent *ee) {
1686 if(ee->error_code == BadWindow
1687 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1688 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1689 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1690 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1691 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1692 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1693 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1694 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1695 return 0;
1696 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1697 ee->request_code, ee->error_code);
1698 return xerrorxlib(dpy, ee); /* may call exit */
1699 }
1700
1701 int
1702 xerrordummy(Display *dpy, XErrorEvent *ee) {
1703 return 0;
1704 }
1705
1706 /* Startup Error handler to check if another window manager
1707 * is already running. */
1708 int
1709 xerrorstart(Display *dpy, XErrorEvent *ee) {
1710 otherwm = True;
1711 return -1;
1712 }
1713
1714 int
1715 main(int argc, char *argv[]) {
1716 if(argc == 2 && !strcmp("-v", argv[1]))
1717 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1718 else if(argc != 1)
1719 eprint("usage: dwm [-v]\n");
1720
1721 setlocale(LC_CTYPE, "");
1722 if(!(dpy = XOpenDisplay(0)))
1723 eprint("dwm: cannot open display\n");
1724
1725 checkotherwm();
1726 setup();
1727 scan();
1728 run();
1729 cleanup();
1730
1731 XCloseDisplay(dpy);
1732 return 0;
1733 }