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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 #define DEFGEOM(GEONAME,BX,BY,BW,WX,WY,WW,WH,MX,MY,MW,MH,TX,TY,TW,TH,MOX,MOY,MOW,MOH) \
50 void GEONAME(void) { \
51 bx = (BX); by = (BY); bw = (BW); \
52 wx = (WX); wy = (WY); ww = (WW); wh = (WH); \
53 mx = (MX); my = (MY); mw = (MW); mh = (MH); \
54 tx = (TX); ty = (TY); tw = (TW); th = (TH); \
55 mox = (MOX); moy = (MOY); mow = (MOW); moh = (MOH); \
56 }
57
58 /* enums */
59 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
60 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
61 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
62 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
63
64 /* typedefs */
65 typedef struct Client Client;
66 struct Client {
67 char name[256];
68 int x, y, w, h;
69 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
70 int minax, maxax, minay, maxay;
71 long flags;
72 unsigned int bw, oldbw;
73 Bool isbanned, isfixed, isfloating, isurgent;
74 Bool *tags;
75 Client *next;
76 Client *prev;
77 Client *snext;
78 Window win;
79 };
80
81 typedef struct {
82 int x, y, w, h;
83 unsigned long norm[ColLast];
84 unsigned long sel[ColLast];
85 Drawable drawable;
86 GC gc;
87 struct {
88 int ascent;
89 int descent;
90 int height;
91 XFontSet set;
92 XFontStruct *xfont;
93 } font;
94 } DC; /* draw context */
95
96 typedef struct {
97 const char *symbol;
98 void (*apply)(void);
99 } Geom;
100
101 typedef struct {
102 unsigned long mod;
103 KeySym keysym;
104 void (*func)(const char *arg);
105 const char *arg;
106 } Key;
107
108 typedef struct {
109 const char *symbol;
110 void (*arrange)(void);
111 Bool isfloating;
112 } Layout;
113
114 typedef struct {
115 const char *class;
116 const char *instance;
117 const char *title;
118 const char *tag;
119 Bool isfloating;
120 } Rule;
121
122 /* function declarations */
123 void applyrules(Client *c);
124 void arrange(void);
125 void attach(Client *c);
126 void attachstack(Client *c);
127 void ban(Client *c);
128 void buttonpress(XEvent *e);
129 void checkotherwm(void);
130 void cleanup(void);
131 void configure(Client *c);
132 void configurenotify(XEvent *e);
133 void configurerequest(XEvent *e);
134 unsigned int counttiled(void);
135 void destroynotify(XEvent *e);
136 void detach(Client *c);
137 void detachstack(Client *c);
138 void drawbar(void);
139 void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
140 void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
141 void *emallocz(unsigned int size);
142 void enternotify(XEvent *e);
143 void eprint(const char *errstr, ...);
144 void expose(XEvent *e);
145 void floating(void); /* default floating layout */
146 void focus(Client *c);
147 void focusin(XEvent *e);
148 void focusnext(const char *arg);
149 void focusprev(const char *arg);
150 Client *getclient(Window w);
151 unsigned long getcolor(const char *colstr);
152 long getstate(Window w);
153 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
154 void grabbuttons(Client *c, Bool focused);
155 void grabkeys(void);
156 unsigned int idxoftag(const char *t);
157 void initfont(const char *fontstr);
158 Bool isoccupied(unsigned int t);
159 Bool isprotodel(Client *c);
160 Bool isurgent(unsigned int t);
161 Bool isvisible(Client *c);
162 void keypress(XEvent *e);
163 void killclient(const char *arg);
164 void manage(Window w, XWindowAttributes *wa);
165 void mappingnotify(XEvent *e);
166 void maprequest(XEvent *e);
167 void monocle(void);
168 void movemouse(Client *c);
169 Client *nexttiled(Client *c);
170 void propertynotify(XEvent *e);
171 void quit(const char *arg);
172 void reapply(const char *arg);
173 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
174 void resizemouse(Client *c);
175 void restack(void);
176 void run(void);
177 void scan(void);
178 void setclientstate(Client *c, long state);
179 void setgeom(const char *arg);
180 void setlayout(const char *arg);
181 void setup(void);
182 void spawn(const char *arg);
183 void tag(const char *arg);
184 unsigned int textnw(const char *text, unsigned int len);
185 unsigned int textw(const char *text);
186 void tileh(void);
187 void tilehstack(unsigned int n);
188 Client *tilemaster(unsigned int n);
189 void tileresize(Client *c, int x, int y, int w, int h);
190 void tilev(void);
191 void tilevstack(unsigned int n);
192 void togglefloating(const char *arg);
193 void toggletag(const char *arg);
194 void toggleview(const char *arg);
195 void unban(Client *c);
196 void unmanage(Client *c);
197 void unmapnotify(XEvent *e);
198 void updatebarpos(void);
199 void updatesizehints(Client *c);
200 void updatetitle(Client *c);
201 void updatewmhints(Client *c);
202 void view(const char *arg);
203 void viewprevtag(const char *arg); /* views previous selected tags */
204 int xerror(Display *dpy, XErrorEvent *ee);
205 int xerrordummy(Display *dpy, XErrorEvent *ee);
206 int xerrorstart(Display *dpy, XErrorEvent *ee);
207 void zoom(const char *arg);
208
209 /* variables */
210 char stext[256], buf[256];
211 int screen, sx, sy, sw, sh;
212 int (*xerrorxlib)(Display *, XErrorEvent *);
213 int bx, by, bw, bh, blw, bgw, mx, my, mw, mh, mox, moy, mow, moh, tx, ty, tw, th, wx, wy, ww, wh;
214 unsigned int numlockmask = 0;
215 void (*handler[LASTEvent]) (XEvent *) = {
216 [ButtonPress] = buttonpress,
217 [ConfigureRequest] = configurerequest,
218 [ConfigureNotify] = configurenotify,
219 [DestroyNotify] = destroynotify,
220 [EnterNotify] = enternotify,
221 [Expose] = expose,
222 [FocusIn] = focusin,
223 [KeyPress] = keypress,
224 [MappingNotify] = mappingnotify,
225 [MapRequest] = maprequest,
226 [PropertyNotify] = propertynotify,
227 [UnmapNotify] = unmapnotify
228 };
229 Atom wmatom[WMLast], netatom[NetLast];
230 Bool otherwm, readin;
231 Bool running = True;
232 Bool *prevtags;
233 Bool *seltags;
234 Client *clients = NULL;
235 Client *sel = NULL;
236 Client *stack = NULL;
237 Cursor cursor[CurLast];
238 Display *dpy;
239 DC dc = {0};
240 Geom *geom = NULL;
241 Layout *lt = NULL;
242 Window root, barwin;
243
244 /* configuration, allows nested code to access above variables */
245 #include "config.h"
246 #define TAGSZ (LENGTH(tags) * sizeof(Bool))
247 static Bool tmp[LENGTH(tags)];
248
249 /* function implementations */
250
251 void
252 applyrules(Client *c) {
253 unsigned int i;
254 Bool matched = False;
255 Rule *r;
256 XClassHint ch = { 0 };
257
258 /* rule matching */
259 XGetClassHint(dpy, c->win, &ch);
260 for(i = 0; i < LENGTH(rules); i++) {
261 r = &rules[i];
262 if(r->title && strstr(c->name, r->title)
263 || (ch.res_class && r->class && strstr(ch.res_class, r->class))
264 || (ch.res_name && r->instance && strstr(ch.res_name, r->instance)))
265 {
266 c->isfloating = r->isfloating;
267 if(r->tag) {
268 c->tags[idxoftag(r->tag)] = True;
269 matched = True;
270 }
271 }
272 }
273 if(ch.res_class)
274 XFree(ch.res_class);
275 if(ch.res_name)
276 XFree(ch.res_name);
277 if(!matched)
278 memcpy(c->tags, seltags, TAGSZ);
279 }
280
281 void
282 arrange(void) {
283 Client *c;
284
285 for(c = clients; c; c = c->next)
286 if(isvisible(c))
287 unban(c);
288 else
289 ban(c);
290
291 focus(NULL);
292 lt->arrange();
293 restack();
294 }
295
296 void
297 attach(Client *c) {
298 if(clients)
299 clients->prev = c;
300 c->next = clients;
301 clients = c;
302 }
303
304 void
305 attachstack(Client *c) {
306 c->snext = stack;
307 stack = c;
308 }
309
310 void
311 ban(Client *c) {
312 if(c->isbanned)
313 return;
314 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
315 c->isbanned = True;
316 }
317
318 void
319 buttonpress(XEvent *e) {
320 unsigned int i, x;
321 Client *c;
322 XButtonPressedEvent *ev = &e->xbutton;
323
324 if(ev->window == barwin) {
325 x = bgw;
326 for(i = 0; i < LENGTH(tags); i++) {
327 x += textw(tags[i]);
328 if(ev->x > bgw && ev->x < x) {
329 if(ev->button == Button1) {
330 if(ev->state & MODKEY)
331 tag(tags[i]);
332 else
333 view(tags[i]);
334 }
335 else if(ev->button == Button3) {
336 if(ev->state & MODKEY)
337 toggletag(tags[i]);
338 else
339 toggleview(tags[i]);
340 }
341 return;
342 }
343 }
344 }
345 else if((c = getclient(ev->window))) {
346 focus(c);
347 if(CLEANMASK(ev->state) != MODKEY)
348 return;
349 if(ev->button == Button1) {
350 restack();
351 movemouse(c);
352 }
353 else if(ev->button == Button2) {
354 if((floating != lt->arrange) && c->isfloating)
355 togglefloating(NULL);
356 else
357 zoom(NULL);
358 }
359 else if(ev->button == Button3 && !c->isfixed) {
360 restack();
361 resizemouse(c);
362 }
363 }
364 }
365
366 void
367 checkotherwm(void) {
368 otherwm = False;
369 XSetErrorHandler(xerrorstart);
370
371 /* this causes an error if some other window manager is running */
372 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
373 XSync(dpy, False);
374 if(otherwm)
375 eprint("dwm: another window manager is already running\n");
376 XSync(dpy, False);
377 XSetErrorHandler(NULL);
378 xerrorxlib = XSetErrorHandler(xerror);
379 XSync(dpy, False);
380 }
381
382 void
383 cleanup(void) {
384 close(STDIN_FILENO);
385 while(stack) {
386 unban(stack);
387 unmanage(stack);
388 }
389 if(dc.font.set)
390 XFreeFontSet(dpy, dc.font.set);
391 else
392 XFreeFont(dpy, dc.font.xfont);
393 XUngrabKey(dpy, AnyKey, AnyModifier, root);
394 XFreePixmap(dpy, dc.drawable);
395 XFreeGC(dpy, dc.gc);
396 XFreeCursor(dpy, cursor[CurNormal]);
397 XFreeCursor(dpy, cursor[CurResize]);
398 XFreeCursor(dpy, cursor[CurMove]);
399 XDestroyWindow(dpy, barwin);
400 XSync(dpy, False);
401 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
402 }
403
404 void
405 configure(Client *c) {
406 XConfigureEvent ce;
407
408 ce.type = ConfigureNotify;
409 ce.display = dpy;
410 ce.event = c->win;
411 ce.window = c->win;
412 ce.x = c->x;
413 ce.y = c->y;
414 ce.width = c->w;
415 ce.height = c->h;
416 ce.border_width = c->bw;
417 ce.above = None;
418 ce.override_redirect = False;
419 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
420 }
421
422 void
423 configurenotify(XEvent *e) {
424 XConfigureEvent *ev = &e->xconfigure;
425
426 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
427 sw = ev->width;
428 sh = ev->height;
429 setgeom(NULL);
430 }
431 }
432
433 void
434 configurerequest(XEvent *e) {
435 Client *c;
436 XConfigureRequestEvent *ev = &e->xconfigurerequest;
437 XWindowChanges wc;
438
439 if((c = getclient(ev->window))) {
440 if(ev->value_mask & CWBorderWidth)
441 c->bw = ev->border_width;
442 if(c->isfixed || c->isfloating || lt->isfloating) {
443 if(ev->value_mask & CWX)
444 c->x = sx + ev->x;
445 if(ev->value_mask & CWY)
446 c->y = sy + ev->y;
447 if(ev->value_mask & CWWidth)
448 c->w = ev->width;
449 if(ev->value_mask & CWHeight)
450 c->h = ev->height;
451 if((c->x - sx + c->w) > sw && c->isfloating)
452 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
453 if((c->y - sy + c->h) > sh && c->isfloating)
454 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
455 if((ev->value_mask & (CWX|CWY))
456 && !(ev->value_mask & (CWWidth|CWHeight)))
457 configure(c);
458 if(isvisible(c))
459 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
460 }
461 else
462 configure(c);
463 }
464 else {
465 wc.x = ev->x;
466 wc.y = ev->y;
467 wc.width = ev->width;
468 wc.height = ev->height;
469 wc.border_width = ev->border_width;
470 wc.sibling = ev->above;
471 wc.stack_mode = ev->detail;
472 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
473 }
474 XSync(dpy, False);
475 }
476
477 unsigned int
478 counttiled(void) {
479 unsigned int n;
480 Client *c;
481
482 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
483 return n;
484 }
485
486 void
487 destroynotify(XEvent *e) {
488 Client *c;
489 XDestroyWindowEvent *ev = &e->xdestroywindow;
490
491 if((c = getclient(ev->window)))
492 unmanage(c);
493 }
494
495 void
496 detach(Client *c) {
497 if(c->prev)
498 c->prev->next = c->next;
499 if(c->next)
500 c->next->prev = c->prev;
501 if(c == clients)
502 clients = c->next;
503 c->next = c->prev = NULL;
504 }
505
506 void
507 detachstack(Client *c) {
508 Client **tc;
509
510 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
511 *tc = c->snext;
512 }
513
514 void
515 drawbar(void) {
516 int i, x;
517 Client *c;
518
519 dc.x = 0;
520 dc.w = bgw;
521 drawtext(geom->symbol, dc.norm, False);
522 dc.x += bgw;
523 for(c = stack; c && !isvisible(c); c = c->snext);
524 for(i = 0; i < LENGTH(tags); i++) {
525 dc.w = textw(tags[i]);
526 if(seltags[i]) {
527 drawtext(tags[i], dc.sel, isurgent(i));
528 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
529 }
530 else {
531 drawtext(tags[i], dc.norm, isurgent(i));
532 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
533 }
534 dc.x += dc.w;
535 }
536 dc.w = blw;
537 drawtext(lt->symbol, dc.norm, False);
538 x = dc.x + dc.w;
539 dc.w = textw(stext);
540 dc.x = bw - dc.w;
541 if(dc.x < x) {
542 dc.x = x;
543 dc.w = bw - x;
544 }
545 drawtext(stext, dc.norm, False);
546 if((dc.w = dc.x - x) > bh) {
547 dc.x = x;
548 if(c) {
549 drawtext(c->name, dc.sel, False);
550 drawsquare(False, c->isfloating, False, dc.sel);
551 }
552 else
553 drawtext(NULL, dc.norm, False);
554 }
555 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
556 XSync(dpy, False);
557 }
558
559 void
560 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
561 int x;
562 XGCValues gcv;
563 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
564
565 gcv.foreground = col[invert ? ColBG : ColFG];
566 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
567 x = (dc.font.ascent + dc.font.descent + 2) / 4;
568 r.x = dc.x + 1;
569 r.y = dc.y + 1;
570 if(filled) {
571 r.width = r.height = x + 1;
572 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
573 }
574 else if(empty) {
575 r.width = r.height = x;
576 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
577 }
578 }
579
580 void
581 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
582 int x, y, w, h;
583 unsigned int len, olen;
584 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
585
586 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
587 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
588 if(!text)
589 return;
590 w = 0;
591 olen = len = strlen(text);
592 if(len >= sizeof buf)
593 len = sizeof buf - 1;
594 memcpy(buf, text, len);
595 buf[len] = 0;
596 h = dc.font.ascent + dc.font.descent;
597 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
598 x = dc.x + (h / 2);
599 /* shorten text if necessary */
600 while(len && (w = textnw(buf, len)) > dc.w - h)
601 buf[--len] = 0;
602 if(len < olen) {
603 if(len > 1)
604 buf[len - 1] = '.';
605 if(len > 2)
606 buf[len - 2] = '.';
607 if(len > 3)
608 buf[len - 3] = '.';
609 }
610 if(w > dc.w)
611 return; /* too long */
612 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
613 if(dc.font.set)
614 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
615 else
616 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
617 }
618
619 void *
620 emallocz(unsigned int size) {
621 void *res = calloc(1, size);
622
623 if(!res)
624 eprint("fatal: could not malloc() %u bytes\n", size);
625 return res;
626 }
627
628 void
629 enternotify(XEvent *e) {
630 Client *c;
631 XCrossingEvent *ev = &e->xcrossing;
632
633 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
634 return;
635 if((c = getclient(ev->window)))
636 focus(c);
637 else
638 focus(NULL);
639 }
640
641 void
642 eprint(const char *errstr, ...) {
643 va_list ap;
644
645 va_start(ap, errstr);
646 vfprintf(stderr, errstr, ap);
647 va_end(ap);
648 exit(EXIT_FAILURE);
649 }
650
651 void
652 expose(XEvent *e) {
653 XExposeEvent *ev = &e->xexpose;
654
655 if(ev->count == 0 && (ev->window == barwin))
656 drawbar();
657 }
658
659 void
660 floating(void) { /* default floating layout */
661 Client *c;
662
663 for(c = clients; c; c = c->next)
664 if(isvisible(c))
665 resize(c, c->x, c->y, c->w, c->h, True);
666 }
667
668 void
669 focus(Client *c) {
670 if(!c || (c && !isvisible(c)))
671 for(c = stack; c && !isvisible(c); c = c->snext);
672 if(sel && sel != c) {
673 grabbuttons(sel, False);
674 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
675 }
676 if(c) {
677 detachstack(c);
678 attachstack(c);
679 grabbuttons(c, True);
680 }
681 sel = c;
682 if(c) {
683 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
684 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
685 }
686 else
687 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
688 drawbar();
689 }
690
691 void
692 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
693 XFocusChangeEvent *ev = &e->xfocus;
694
695 if(sel && ev->window != sel->win)
696 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
697 }
698
699 void
700 focusnext(const char *arg) {
701 Client *c;
702
703 if(!sel)
704 return;
705 for(c = sel->next; c && !isvisible(c); c = c->next);
706 if(!c)
707 for(c = clients; c && !isvisible(c); c = c->next);
708 if(c) {
709 focus(c);
710 restack();
711 }
712 }
713
714 void
715 focusprev(const char *arg) {
716 Client *c;
717
718 if(!sel)
719 return;
720 for(c = sel->prev; c && !isvisible(c); c = c->prev);
721 if(!c) {
722 for(c = clients; c && c->next; c = c->next);
723 for(; c && !isvisible(c); c = c->prev);
724 }
725 if(c) {
726 focus(c);
727 restack();
728 }
729 }
730
731 Client *
732 getclient(Window w) {
733 Client *c;
734
735 for(c = clients; c && c->win != w; c = c->next);
736 return c;
737 }
738
739 unsigned long
740 getcolor(const char *colstr) {
741 Colormap cmap = DefaultColormap(dpy, screen);
742 XColor color;
743
744 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
745 eprint("error, cannot allocate color '%s'\n", colstr);
746 return color.pixel;
747 }
748
749 long
750 getstate(Window w) {
751 int format, status;
752 long result = -1;
753 unsigned char *p = NULL;
754 unsigned long n, extra;
755 Atom real;
756
757 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
758 &real, &format, &n, &extra, (unsigned char **)&p);
759 if(status != Success)
760 return -1;
761 if(n != 0)
762 result = *p;
763 XFree(p);
764 return result;
765 }
766
767 Bool
768 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
769 char **list = NULL;
770 int n;
771 XTextProperty name;
772
773 if(!text || size == 0)
774 return False;
775 text[0] = '\0';
776 XGetTextProperty(dpy, w, &name, atom);
777 if(!name.nitems)
778 return False;
779 if(name.encoding == XA_STRING)
780 strncpy(text, (char *)name.value, size - 1);
781 else {
782 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
783 && n > 0 && *list) {
784 strncpy(text, *list, size - 1);
785 XFreeStringList(list);
786 }
787 }
788 text[size - 1] = '\0';
789 XFree(name.value);
790 return True;
791 }
792
793 void
794 grabbuttons(Client *c, Bool focused) {
795 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
796
797 if(focused) {
798 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
799 GrabModeAsync, GrabModeSync, None, None);
800 XGrabButton(dpy, Button1, MODKEY|LockMask, c->win, False, BUTTONMASK,
801 GrabModeAsync, GrabModeSync, None, None);
802 XGrabButton(dpy, Button1, MODKEY|numlockmask, c->win, False, BUTTONMASK,
803 GrabModeAsync, GrabModeSync, None, None);
804 XGrabButton(dpy, Button1, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
805 GrabModeAsync, GrabModeSync, None, None);
806
807 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
808 GrabModeAsync, GrabModeSync, None, None);
809 XGrabButton(dpy, Button2, MODKEY|LockMask, c->win, False, BUTTONMASK,
810 GrabModeAsync, GrabModeSync, None, None);
811 XGrabButton(dpy, Button2, MODKEY|numlockmask, c->win, False, BUTTONMASK,
812 GrabModeAsync, GrabModeSync, None, None);
813 XGrabButton(dpy, Button2, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
814 GrabModeAsync, GrabModeSync, None, None);
815
816 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
817 GrabModeAsync, GrabModeSync, None, None);
818 XGrabButton(dpy, Button3, MODKEY|LockMask, c->win, False, BUTTONMASK,
819 GrabModeAsync, GrabModeSync, None, None);
820 XGrabButton(dpy, Button3, MODKEY|numlockmask, c->win, False, BUTTONMASK,
821 GrabModeAsync, GrabModeSync, None, None);
822 XGrabButton(dpy, Button3, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
823 GrabModeAsync, GrabModeSync, None, None);
824 }
825 else
826 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
827 GrabModeAsync, GrabModeSync, None, None);
828 }
829
830 void
831 grabkeys(void) {
832 unsigned int i, j;
833 KeyCode code;
834 XModifierKeymap *modmap;
835
836 /* init modifier map */
837 modmap = XGetModifierMapping(dpy);
838 for(i = 0; i < 8; i++)
839 for(j = 0; j < modmap->max_keypermod; j++) {
840 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
841 numlockmask = (1 << i);
842 }
843 XFreeModifiermap(modmap);
844
845 XUngrabKey(dpy, AnyKey, AnyModifier, root);
846 for(i = 0; i < LENGTH(keys); i++) {
847 code = XKeysymToKeycode(dpy, keys[i].keysym);
848 XGrabKey(dpy, code, keys[i].mod, root, True,
849 GrabModeAsync, GrabModeAsync);
850 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
851 GrabModeAsync, GrabModeAsync);
852 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
853 GrabModeAsync, GrabModeAsync);
854 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
855 GrabModeAsync, GrabModeAsync);
856 }
857 }
858
859 unsigned int
860 idxoftag(const char *t) {
861 unsigned int i;
862
863 for(i = 0; (i < LENGTH(tags)) && strcmp(tags[i], t); i++);
864 return (i < LENGTH(tags)) ? i : 0;
865 }
866
867 void
868 initfont(const char *fontstr) {
869 char *def, **missing;
870 int i, n;
871
872 missing = NULL;
873 if(dc.font.set)
874 XFreeFontSet(dpy, dc.font.set);
875 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
876 if(missing) {
877 while(n--)
878 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
879 XFreeStringList(missing);
880 }
881 if(dc.font.set) {
882 XFontSetExtents *font_extents;
883 XFontStruct **xfonts;
884 char **font_names;
885 dc.font.ascent = dc.font.descent = 0;
886 font_extents = XExtentsOfFontSet(dc.font.set);
887 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
888 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
889 if(dc.font.ascent < (*xfonts)->ascent)
890 dc.font.ascent = (*xfonts)->ascent;
891 if(dc.font.descent < (*xfonts)->descent)
892 dc.font.descent = (*xfonts)->descent;
893 xfonts++;
894 }
895 }
896 else {
897 if(dc.font.xfont)
898 XFreeFont(dpy, dc.font.xfont);
899 dc.font.xfont = NULL;
900 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
901 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
902 eprint("error, cannot load font: '%s'\n", fontstr);
903 dc.font.ascent = dc.font.xfont->ascent;
904 dc.font.descent = dc.font.xfont->descent;
905 }
906 dc.font.height = dc.font.ascent + dc.font.descent;
907 }
908
909 Bool
910 isoccupied(unsigned int t) {
911 Client *c;
912
913 for(c = clients; c; c = c->next)
914 if(c->tags[t])
915 return True;
916 return False;
917 }
918
919 Bool
920 isprotodel(Client *c) {
921 int i, n;
922 Atom *protocols;
923 Bool ret = False;
924
925 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
926 for(i = 0; !ret && i < n; i++)
927 if(protocols[i] == wmatom[WMDelete])
928 ret = True;
929 XFree(protocols);
930 }
931 return ret;
932 }
933
934 Bool
935 isurgent(unsigned int t) {
936 Client *c;
937
938 for(c = clients; c; c = c->next)
939 if(c->isurgent && c->tags[t])
940 return True;
941 return False;
942 }
943
944 Bool
945 isvisible(Client *c) {
946 unsigned int i;
947
948 for(i = 0; i < LENGTH(tags); i++)
949 if(c->tags[i] && seltags[i])
950 return True;
951 return False;
952 }
953
954 void
955 keypress(XEvent *e) {
956 unsigned int i;
957 KeySym keysym;
958 XKeyEvent *ev;
959
960 ev = &e->xkey;
961 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
962 for(i = 0; i < LENGTH(keys); i++)
963 if(keysym == keys[i].keysym
964 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
965 {
966 if(keys[i].func)
967 keys[i].func(keys[i].arg);
968 }
969 }
970
971 void
972 killclient(const char *arg) {
973 XEvent ev;
974
975 if(!sel)
976 return;
977 if(isprotodel(sel)) {
978 ev.type = ClientMessage;
979 ev.xclient.window = sel->win;
980 ev.xclient.message_type = wmatom[WMProtocols];
981 ev.xclient.format = 32;
982 ev.xclient.data.l[0] = wmatom[WMDelete];
983 ev.xclient.data.l[1] = CurrentTime;
984 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
985 }
986 else
987 XKillClient(dpy, sel->win);
988 }
989
990 void
991 manage(Window w, XWindowAttributes *wa) {
992 Client *c, *t = NULL;
993 Status rettrans;
994 Window trans;
995 XWindowChanges wc;
996
997 c = emallocz(sizeof(Client));
998 c->tags = emallocz(TAGSZ);
999 c->win = w;
1000
1001 /* geometry */
1002 c->x = wa->x;
1003 c->y = wa->y;
1004 c->w = wa->width;
1005 c->h = wa->height;
1006 c->oldbw = wa->border_width;
1007 if(c->w == sw && c->h == sh) {
1008 c->x = sx;
1009 c->y = sy;
1010 c->bw = wa->border_width;
1011 }
1012 else {
1013 if(c->x + c->w + 2 * c->bw > wx + ww)
1014 c->x = wx + ww - c->w - 2 * c->bw;
1015 if(c->y + c->h + 2 * c->bw > wy + wh)
1016 c->y = wy + wh - c->h - 2 * c->bw;
1017 if(c->x < wx)
1018 c->x = wx;
1019 if(c->y < wy)
1020 c->y = wy;
1021 c->bw = BORDERPX;
1022 }
1023
1024 wc.border_width = c->bw;
1025 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1026 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1027 configure(c); /* propagates border_width, if size doesn't change */
1028 updatesizehints(c);
1029 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1030 grabbuttons(c, False);
1031 updatetitle(c);
1032 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1033 for(t = clients; t && t->win != trans; t = t->next);
1034 if(t)
1035 memcpy(c->tags, t->tags, TAGSZ);
1036 else
1037 applyrules(c);
1038 if(!c->isfloating)
1039 c->isfloating = (rettrans == Success) || c->isfixed;
1040 attach(c);
1041 attachstack(c);
1042 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1043 ban(c);
1044 XMapWindow(dpy, c->win);
1045 setclientstate(c, NormalState);
1046 arrange();
1047 }
1048
1049 void
1050 mappingnotify(XEvent *e) {
1051 XMappingEvent *ev = &e->xmapping;
1052
1053 XRefreshKeyboardMapping(ev);
1054 if(ev->request == MappingKeyboard)
1055 grabkeys();
1056 }
1057
1058 void
1059 maprequest(XEvent *e) {
1060 static XWindowAttributes wa;
1061 XMapRequestEvent *ev = &e->xmaprequest;
1062
1063 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1064 return;
1065 if(wa.override_redirect)
1066 return;
1067 if(!getclient(ev->window))
1068 manage(ev->window, &wa);
1069 }
1070
1071 void
1072 monocle(void) {
1073 Client *c;
1074
1075 for(c = clients; c; c = c->next)
1076 if(isvisible(c))
1077 resize(c, mox, moy, mow - 2 * c->bw, moh - 2 * c->bw, RESIZEHINTS);
1078 }
1079
1080 void
1081 movemouse(Client *c) {
1082 int x1, y1, ocx, ocy, di, nx, ny;
1083 unsigned int dui;
1084 Window dummy;
1085 XEvent ev;
1086
1087 ocx = nx = c->x;
1088 ocy = ny = c->y;
1089 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1090 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1091 return;
1092 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1093 for(;;) {
1094 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1095 switch (ev.type) {
1096 case ButtonRelease:
1097 XUngrabPointer(dpy, CurrentTime);
1098 return;
1099 case ConfigureRequest:
1100 case Expose:
1101 case MapRequest:
1102 handler[ev.type](&ev);
1103 break;
1104 case MotionNotify:
1105 XSync(dpy, False);
1106 nx = ocx + (ev.xmotion.x - x1);
1107 ny = ocy + (ev.xmotion.y - y1);
1108 if(abs(wx - nx) < SNAP)
1109 nx = wx;
1110 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < SNAP)
1111 nx = wx + ww - c->w - 2 * c->bw;
1112 if(abs(wy - ny) < SNAP)
1113 ny = wy;
1114 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < SNAP)
1115 ny = wy + wh - c->h - 2 * c->bw;
1116 if(!c->isfloating && !lt->isfloating && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1117 togglefloating(NULL);
1118 if((lt->isfloating) || c->isfloating)
1119 resize(c, nx, ny, c->w, c->h, False);
1120 break;
1121 }
1122 }
1123 }
1124
1125 Client *
1126 nexttiled(Client *c) {
1127 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1128 return c;
1129 }
1130
1131 void
1132 propertynotify(XEvent *e) {
1133 Client *c;
1134 Window trans;
1135 XPropertyEvent *ev = &e->xproperty;
1136
1137 if(ev->state == PropertyDelete)
1138 return; /* ignore */
1139 if((c = getclient(ev->window))) {
1140 switch (ev->atom) {
1141 default: break;
1142 case XA_WM_TRANSIENT_FOR:
1143 XGetTransientForHint(dpy, c->win, &trans);
1144 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1145 arrange();
1146 break;
1147 case XA_WM_NORMAL_HINTS:
1148 updatesizehints(c);
1149 break;
1150 case XA_WM_HINTS:
1151 updatewmhints(c);
1152 drawbar();
1153 break;
1154 }
1155 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1156 updatetitle(c);
1157 if(c == sel)
1158 drawbar();
1159 }
1160 }
1161 }
1162
1163 void
1164 quit(const char *arg) {
1165 readin = running = False;
1166 }
1167
1168 void
1169 reapply(const char *arg) {
1170 static Bool zerotags[LENGTH(tags)] = { 0 };
1171 Client *c;
1172
1173 for(c = clients; c; c = c->next) {
1174 memcpy(c->tags, zerotags, sizeof zerotags);
1175 applyrules(c);
1176 }
1177 arrange();
1178 }
1179
1180 void
1181 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1182 XWindowChanges wc;
1183
1184 if(sizehints) {
1185 /* set minimum possible */
1186 if (w < 1)
1187 w = 1;
1188 if (h < 1)
1189 h = 1;
1190
1191 /* temporarily remove base dimensions */
1192 w -= c->basew;
1193 h -= c->baseh;
1194
1195 /* adjust for aspect limits */
1196 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1197 if (w * c->maxay > h * c->maxax)
1198 w = h * c->maxax / c->maxay;
1199 else if (w * c->minay < h * c->minax)
1200 h = w * c->minay / c->minax;
1201 }
1202
1203 /* adjust for increment value */
1204 if(c->incw)
1205 w -= w % c->incw;
1206 if(c->inch)
1207 h -= h % c->inch;
1208
1209 /* restore base dimensions */
1210 w += c->basew;
1211 h += c->baseh;
1212
1213 if(c->minw > 0 && w < c->minw)
1214 w = c->minw;
1215 if(c->minh > 0 && h < c->minh)
1216 h = c->minh;
1217 if(c->maxw > 0 && w > c->maxw)
1218 w = c->maxw;
1219 if(c->maxh > 0 && h > c->maxh)
1220 h = c->maxh;
1221 }
1222 if(w <= 0 || h <= 0)
1223 return;
1224 if(x > sx + sw)
1225 x = sw - w - 2 * c->bw;
1226 if(y > sy + sh)
1227 y = sh - h - 2 * c->bw;
1228 if(x + w + 2 * c->bw < sx)
1229 x = sx;
1230 if(y + h + 2 * c->bw < sy)
1231 y = sy;
1232 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1233 c->x = wc.x = x;
1234 c->y = wc.y = y;
1235 c->w = wc.width = w;
1236 c->h = wc.height = h;
1237 wc.border_width = c->bw;
1238 XConfigureWindow(dpy, c->win,
1239 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1240 configure(c);
1241 XSync(dpy, False);
1242 }
1243 }
1244
1245 void
1246 resizemouse(Client *c) {
1247 int ocx, ocy;
1248 int nw, nh;
1249 XEvent ev;
1250
1251 ocx = c->x;
1252 ocy = c->y;
1253 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1254 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1255 return;
1256 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1257 for(;;) {
1258 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1259 switch(ev.type) {
1260 case ButtonRelease:
1261 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1262 c->w + c->bw - 1, c->h + c->bw - 1);
1263 XUngrabPointer(dpy, CurrentTime);
1264 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1265 return;
1266 case ConfigureRequest:
1267 case Expose:
1268 case MapRequest:
1269 handler[ev.type](&ev);
1270 break;
1271 case MotionNotify:
1272 XSync(dpy, False);
1273 if((nw = ev.xmotion.x - ocx - 2 * c->bw + 1) <= 0)
1274 nw = 1;
1275 if((nh = ev.xmotion.y - ocy - 2 * c->bw + 1) <= 0)
1276 nh = 1;
1277 if(!c->isfloating && !lt->isfloating && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1278 togglefloating(NULL);
1279 if((lt->isfloating) || c->isfloating)
1280 resize(c, c->x, c->y, nw, nh, True);
1281 break;
1282 }
1283 }
1284 }
1285
1286 void
1287 restack(void) {
1288 Client *c;
1289 XEvent ev;
1290 XWindowChanges wc;
1291
1292 drawbar();
1293 if(!sel)
1294 return;
1295 if(sel->isfloating || lt->isfloating)
1296 XRaiseWindow(dpy, sel->win);
1297 if(!lt->isfloating) {
1298 wc.stack_mode = Below;
1299 wc.sibling = barwin;
1300 if(!sel->isfloating) {
1301 XConfigureWindow(dpy, sel->win, CWSibling|CWStackMode, &wc);
1302 wc.sibling = sel->win;
1303 }
1304 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1305 if(c == sel)
1306 continue;
1307 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1308 wc.sibling = c->win;
1309 }
1310 }
1311 XSync(dpy, False);
1312 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1313 }
1314
1315 void
1316 run(void) {
1317 char *p;
1318 char sbuf[sizeof stext];
1319 fd_set rd;
1320 int r, xfd;
1321 unsigned int len, offset;
1322 XEvent ev;
1323
1324 /* main event loop, also reads status text from stdin */
1325 XSync(dpy, False);
1326 xfd = ConnectionNumber(dpy);
1327 readin = True;
1328 offset = 0;
1329 len = sizeof stext - 1;
1330 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1331 while(running) {
1332 FD_ZERO(&rd);
1333 if(readin)
1334 FD_SET(STDIN_FILENO, &rd);
1335 FD_SET(xfd, &rd);
1336 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1337 if(errno == EINTR)
1338 continue;
1339 eprint("select failed\n");
1340 }
1341 if(FD_ISSET(STDIN_FILENO, &rd)) {
1342 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1343 case -1:
1344 strncpy(stext, strerror(errno), len);
1345 readin = False;
1346 break;
1347 case 0:
1348 strncpy(stext, "EOF", 4);
1349 readin = False;
1350 break;
1351 default:
1352 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1353 if(*p == '\n' || *p == '\0') {
1354 *p = '\0';
1355 strncpy(stext, sbuf, len);
1356 p += r - 1; /* p is sbuf + offset + r - 1 */
1357 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1358 offset = r;
1359 if(r)
1360 memmove(sbuf, p - r + 1, r);
1361 break;
1362 }
1363 break;
1364 }
1365 drawbar();
1366 }
1367 while(XPending(dpy)) {
1368 XNextEvent(dpy, &ev);
1369 if(handler[ev.type])
1370 (handler[ev.type])(&ev); /* call handler */
1371 }
1372 }
1373 }
1374
1375 void
1376 scan(void) {
1377 unsigned int i, num;
1378 Window *wins, d1, d2;
1379 XWindowAttributes wa;
1380
1381 wins = NULL;
1382 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1383 for(i = 0; i < num; i++) {
1384 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1385 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1386 continue;
1387 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1388 manage(wins[i], &wa);
1389 }
1390 for(i = 0; i < num; i++) { /* now the transients */
1391 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1392 continue;
1393 if(XGetTransientForHint(dpy, wins[i], &d1)
1394 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1395 manage(wins[i], &wa);
1396 }
1397 }
1398 if(wins)
1399 XFree(wins);
1400 }
1401
1402 void
1403 setclientstate(Client *c, long state) {
1404 long data[] = {state, None};
1405
1406 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1407 PropModeReplace, (unsigned char *)data, 2);
1408 }
1409
1410 void
1411 setgeom(const char *arg) {
1412 unsigned int i;
1413
1414 for(i = 0; arg && i < LENGTH(geoms); i++)
1415 if(!strcmp(geoms[i].symbol, arg))
1416 break;
1417 if(i == LENGTH(geoms))
1418 return;
1419 geom = &geoms[i];
1420 geom->apply();
1421 updatebarpos();
1422 arrange();
1423 }
1424
1425 void
1426 setlayout(const char *arg) {
1427 static Layout *revert = 0;
1428 unsigned int i;
1429
1430 if(!arg)
1431 return;
1432 for(i = 0; i < LENGTH(layouts); i++)
1433 if(!strcmp(arg, layouts[i].symbol))
1434 break;
1435 if(i == LENGTH(layouts))
1436 return;
1437 if(revert && &layouts[i] == lt)
1438 lt = revert;
1439 else {
1440 revert = lt;
1441 lt = &layouts[i];
1442 }
1443 if(sel)
1444 arrange();
1445 else
1446 drawbar();
1447 }
1448
1449 void
1450 setup(void) {
1451 unsigned int i, w;
1452 XSetWindowAttributes wa;
1453
1454 /* init screen */
1455 screen = DefaultScreen(dpy);
1456 root = RootWindow(dpy, screen);
1457 initfont(FONT);
1458
1459 /* apply default geometry */
1460 sx = 0;
1461 sy = 0;
1462 sw = DisplayWidth(dpy, screen);
1463 sh = DisplayHeight(dpy, screen);
1464 bh = dc.font.height + 2;
1465 geom = &geoms[0];
1466 geom->apply();
1467
1468 /* init atoms */
1469 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1470 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1471 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1472 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1473 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1474 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1475
1476 /* init cursors */
1477 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1478 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1479 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1480
1481 /* init appearance */
1482 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1483 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1484 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1485 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1486 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1487 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1488 initfont(FONT);
1489 dc.h = bh;
1490 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1491 dc.gc = XCreateGC(dpy, root, 0, 0);
1492 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1493 if(!dc.font.set)
1494 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1495
1496 /* init tags */
1497 seltags = emallocz(TAGSZ);
1498 prevtags = emallocz(TAGSZ);
1499 seltags[0] = prevtags[0] = True;
1500
1501 /* init layouts */
1502 lt = &layouts[0];
1503
1504 /* init bar */
1505 for(blw = i = 0; i < LENGTH(layouts); i++) {
1506 w = textw(layouts[i].symbol);
1507 if(w > blw)
1508 blw = w;
1509 }
1510 for(bgw = i = 0; i < LENGTH(geoms); i++) {
1511 w = textw(geoms[i].symbol);
1512 if(w > bgw)
1513 bgw = w;
1514 }
1515
1516 wa.override_redirect = 1;
1517 wa.background_pixmap = ParentRelative;
1518 wa.event_mask = ButtonPressMask|ExposureMask;
1519
1520 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1521 CopyFromParent, DefaultVisual(dpy, screen),
1522 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1523 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1524 XMapRaised(dpy, barwin);
1525 strcpy(stext, "dwm-"VERSION);
1526 drawbar();
1527
1528 /* EWMH support per view */
1529 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1530 PropModeReplace, (unsigned char *) netatom, NetLast);
1531
1532 /* select for events */
1533 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1534 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1535 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1536 XSelectInput(dpy, root, wa.event_mask);
1537
1538
1539 /* grab keys */
1540 grabkeys();
1541 }
1542
1543 void
1544 spawn(const char *arg) {
1545 static char *shell = NULL;
1546
1547 if(!shell && !(shell = getenv("SHELL")))
1548 shell = "/bin/sh";
1549 if(!arg)
1550 return;
1551 /* The double-fork construct avoids zombie processes and keeps the code
1552 * clean from stupid signal handlers. */
1553 if(fork() == 0) {
1554 if(fork() == 0) {
1555 if(dpy)
1556 close(ConnectionNumber(dpy));
1557 setsid();
1558 execl(shell, shell, "-c", arg, (char *)NULL);
1559 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1560 perror(" failed");
1561 }
1562 exit(0);
1563 }
1564 wait(0);
1565 }
1566
1567 void
1568 tag(const char *arg) {
1569 unsigned int i;
1570
1571 if(!sel)
1572 return;
1573 for(i = 0; i < LENGTH(tags); i++)
1574 sel->tags[i] = (NULL == arg);
1575 sel->tags[idxoftag(arg)] = True;
1576 arrange();
1577 }
1578
1579 unsigned int
1580 textnw(const char *text, unsigned int len) {
1581 XRectangle r;
1582
1583 if(dc.font.set) {
1584 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1585 return r.width;
1586 }
1587 return XTextWidth(dc.font.xfont, text, len);
1588 }
1589
1590 unsigned int
1591 textw(const char *text) {
1592 return textnw(text, strlen(text)) + dc.font.height;
1593 }
1594
1595 void
1596 tileh(void) {
1597 int x, w;
1598 unsigned int i, n = counttiled();
1599 Client *c;
1600
1601 if(n == 0)
1602 return;
1603 c = tilemaster(n);
1604 if(--n == 0)
1605 return;
1606
1607 x = tx;
1608 w = tw / n;
1609 if(w < bh)
1610 w = tw;
1611
1612 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1613 if(i + 1 == n) /* remainder */
1614 tileresize(c, x, ty, (tx + tw) - x - 2 * c->bw, th - 2 * c->bw);
1615 else
1616 tileresize(c, x, ty, w - 2 * c->bw, th - 2 * c->bw);
1617 if(w != tw)
1618 x = c->x + c->w + 2 * c->bw;
1619 }
1620 }
1621
1622 Client *
1623 tilemaster(unsigned int n) {
1624 Client *c = nexttiled(clients);
1625
1626 if(n == 1)
1627 tileresize(c, mox, moy, mow - 2 * c->bw, moh - 2 * c->bw);
1628 else
1629 tileresize(c, mx, my, mw - 2 * c->bw, mh - 2 * c->bw);
1630 return c;
1631 }
1632
1633 void
1634 tileresize(Client *c, int x, int y, int w, int h) {
1635 resize(c, x, y, w, h, RESIZEHINTS);
1636 if((RESIZEHINTS) && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
1637 /* client doesn't accept size constraints */
1638 resize(c, x, y, w, h, False);
1639 }
1640
1641 void
1642 tilev(void) {
1643 int y, h;
1644 unsigned int i, n = counttiled();
1645 Client *c;
1646
1647 if(n == 0)
1648 return;
1649 c = tilemaster(n);
1650 if(--n == 0)
1651 return;
1652
1653 y = ty;
1654 h = th / n;
1655 if(h < bh)
1656 h = th;
1657
1658 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1659 if(i + 1 == n) /* remainder */
1660 tileresize(c, tx, y, tw - 2 * c->bw, (ty + th) - y - 2 * c->bw);
1661 else
1662 tileresize(c, tx, y, tw - 2 * c->bw, h - 2 * c->bw);
1663 if(h != th)
1664 y = c->y + c->h + 2 * c->bw;
1665 }
1666 }
1667
1668 void
1669 togglefloating(const char *arg) {
1670 if(!sel)
1671 return;
1672 sel->isfloating = !sel->isfloating;
1673 if(sel->isfloating)
1674 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1675 arrange();
1676 }
1677
1678 void
1679 toggletag(const char *arg) {
1680 unsigned int i, j;
1681
1682 if(!sel)
1683 return;
1684 i = idxoftag(arg);
1685 sel->tags[i] = !sel->tags[i];
1686 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1687 if(j == LENGTH(tags))
1688 sel->tags[i] = True; /* at least one tag must be enabled */
1689 arrange();
1690 }
1691
1692 void
1693 toggleview(const char *arg) {
1694 unsigned int i, j;
1695
1696 i = idxoftag(arg);
1697 seltags[i] = !seltags[i];
1698 for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1699 if(j == LENGTH(tags))
1700 seltags[i] = True; /* at least one tag must be viewed */
1701 arrange();
1702 }
1703
1704 void
1705 unban(Client *c) {
1706 if(!c->isbanned)
1707 return;
1708 XMoveWindow(dpy, c->win, c->x, c->y);
1709 c->isbanned = False;
1710 }
1711
1712 void
1713 unmanage(Client *c) {
1714 XWindowChanges wc;
1715
1716 wc.border_width = c->oldbw;
1717 /* The server grab construct avoids race conditions. */
1718 XGrabServer(dpy);
1719 XSetErrorHandler(xerrordummy);
1720 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1721 detach(c);
1722 detachstack(c);
1723 if(sel == c)
1724 focus(NULL);
1725 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1726 setclientstate(c, WithdrawnState);
1727 free(c->tags);
1728 free(c);
1729 XSync(dpy, False);
1730 XSetErrorHandler(xerror);
1731 XUngrabServer(dpy);
1732 arrange();
1733 }
1734
1735 void
1736 unmapnotify(XEvent *e) {
1737 Client *c;
1738 XUnmapEvent *ev = &e->xunmap;
1739
1740 if((c = getclient(ev->window)))
1741 unmanage(c);
1742 }
1743
1744 void
1745 updatebarpos(void) {
1746
1747 if(dc.drawable != 0)
1748 XFreePixmap(dpy, dc.drawable);
1749 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1750 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1751 }
1752
1753 void
1754 updatesizehints(Client *c) {
1755 long msize;
1756 XSizeHints size;
1757
1758 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1759 size.flags = PSize;
1760 c->flags = size.flags;
1761 if(c->flags & PBaseSize) {
1762 c->basew = size.base_width;
1763 c->baseh = size.base_height;
1764 }
1765 else if(c->flags & PMinSize) {
1766 c->basew = size.min_width;
1767 c->baseh = size.min_height;
1768 }
1769 else
1770 c->basew = c->baseh = 0;
1771 if(c->flags & PResizeInc) {
1772 c->incw = size.width_inc;
1773 c->inch = size.height_inc;
1774 }
1775 else
1776 c->incw = c->inch = 0;
1777 if(c->flags & PMaxSize) {
1778 c->maxw = size.max_width;
1779 c->maxh = size.max_height;
1780 }
1781 else
1782 c->maxw = c->maxh = 0;
1783 if(c->flags & PMinSize) {
1784 c->minw = size.min_width;
1785 c->minh = size.min_height;
1786 }
1787 else if(c->flags & PBaseSize) {
1788 c->minw = size.base_width;
1789 c->minh = size.base_height;
1790 }
1791 else
1792 c->minw = c->minh = 0;
1793 if(c->flags & PAspect) {
1794 c->minax = size.min_aspect.x;
1795 c->maxax = size.max_aspect.x;
1796 c->minay = size.min_aspect.y;
1797 c->maxay = size.max_aspect.y;
1798 }
1799 else
1800 c->minax = c->maxax = c->minay = c->maxay = 0;
1801 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1802 && c->maxw == c->minw && c->maxh == c->minh);
1803 }
1804
1805 void
1806 updatetitle(Client *c) {
1807 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1808 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1809 }
1810
1811 void
1812 updatewmhints(Client *c) {
1813 XWMHints *wmh;
1814
1815 if((wmh = XGetWMHints(dpy, c->win))) {
1816 if(c == sel)
1817 sel->isurgent = False;
1818 else
1819 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1820 XFree(wmh);
1821 }
1822 }
1823
1824
1825 void
1826 view(const char *arg) {
1827 unsigned int i;
1828
1829 for(i = 0; i < LENGTH(tags); i++)
1830 tmp[i] = (NULL == arg);
1831 tmp[idxoftag(arg)] = True;
1832
1833 if(memcmp(seltags, tmp, TAGSZ) != 0) {
1834 memcpy(prevtags, seltags, TAGSZ);
1835 memcpy(seltags, tmp, TAGSZ);
1836 arrange();
1837 }
1838 }
1839
1840 void
1841 viewprevtag(const char *arg) {
1842
1843 memcpy(tmp, seltags, TAGSZ);
1844 memcpy(seltags, prevtags, TAGSZ);
1845 memcpy(prevtags, tmp, TAGSZ);
1846 arrange();
1847 }
1848
1849 /* There's no way to check accesses to destroyed windows, thus those cases are
1850 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1851 * default error handler, which may call exit. */
1852 int
1853 xerror(Display *dpy, XErrorEvent *ee) {
1854 if(ee->error_code == BadWindow
1855 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1856 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1857 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1858 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1859 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1860 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1861 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1862 return 0;
1863 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1864 ee->request_code, ee->error_code);
1865 return xerrorxlib(dpy, ee); /* may call exit */
1866 }
1867
1868 int
1869 xerrordummy(Display *dpy, XErrorEvent *ee) {
1870 return 0;
1871 }
1872
1873 /* Startup Error handler to check if another window manager
1874 * is already running. */
1875 int
1876 xerrorstart(Display *dpy, XErrorEvent *ee) {
1877 otherwm = True;
1878 return -1;
1879 }
1880
1881 void
1882 zoom(const char *arg) {
1883 Client *c = sel;
1884
1885 if(!sel || lt->isfloating || sel->isfloating)
1886 return;
1887 if(c == nexttiled(clients))
1888 if(!(c = nexttiled(c->next)))
1889 return;
1890 detach(c);
1891 attach(c);
1892 focus(c);
1893 arrange();
1894 }
1895
1896 int
1897 main(int argc, char *argv[]) {
1898 if(argc == 2 && !strcmp("-v", argv[1]))
1899 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1900 else if(argc != 1)
1901 eprint("usage: dwm [-v]\n");
1902
1903 setlocale(LC_CTYPE, "");
1904 if(!(dpy = XOpenDisplay(0)))
1905 eprint("dwm: cannot open display\n");
1906
1907 checkotherwm();
1908 setup();
1909 scan();
1910 run();
1911 cleanup();
1912
1913 XCloseDisplay(dpy);
1914 return 0;
1915 }