dwm.c (view raw)
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#define DEFGEOM(GEONAME,BX,BY,BW,WX,WY,WW,WH,MX,MY,MW,MH,TX,TY,TW,TH,MOX,MOY,MOW,MOH) \
52void GEONAME(void) { \
53 bx = (BX); by = (BY); bw = (BW); \
54 wx = (WX); wy = (WY); ww = (WW); wh = (WH); \
55 mx = (MX); my = (MY); mw = (MW); mh = (MH); \
56 tx = (TX); ty = (TY); tw = (TW); th = (TH); \
57 mox = (MOX); moy = (MOY); mow = (MOW); moh = (MOH); \
58}
59
60/* enums */
61enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
62enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
63enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
64enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
65
66/* typedefs */
67typedef struct Client Client;
68struct Client {
69 char name[256];
70 int x, y, w, h;
71 int fx, fy, fw, fh;
72 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
73 int minax, maxax, minay, maxay;
74 long flags;
75 unsigned int bw, oldbw;
76 Bool isbanned, isfixed, isfloating, isurgent;
77 Bool *tags;
78 Client *next;
79 Client *prev;
80 Client *snext;
81 Window win;
82};
83
84typedef struct {
85 int x, y, w, h;
86 unsigned long norm[ColLast];
87 unsigned long sel[ColLast];
88 Drawable drawable;
89 GC gc;
90 struct {
91 int ascent;
92 int descent;
93 int height;
94 XFontSet set;
95 XFontStruct *xfont;
96 } font;
97} DC; /* draw context */
98
99typedef struct {
100 const char *symbol;
101 void (*apply)(void);
102} Geom;
103
104typedef struct {
105 unsigned long mod;
106 KeySym keysym;
107 void (*func)(const char *arg);
108 const char *arg;
109} Key;
110
111typedef struct {
112 const char *symbol;
113 void (*arrange)(void);
114 Bool isfloating;
115} Layout;
116
117typedef struct {
118 const char *class;
119 const char *instance;
120 const char *title;
121 const char *tag;
122 Bool isfloating;
123} Rule;
124
125/* function declarations */
126void applyrules(Client *c);
127void arrange(void);
128void attach(Client *c);
129void attachstack(Client *c);
130void ban(Client *c);
131void buttonpress(XEvent *e);
132void checkotherwm(void);
133void cleanup(void);
134void configure(Client *c);
135void configurenotify(XEvent *e);
136void configurerequest(XEvent *e);
137unsigned int counttiled(void);
138void destroynotify(XEvent *e);
139void detach(Client *c);
140void detachstack(Client *c);
141void drawbar(void);
142void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
143void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
144void *emallocz(unsigned int size);
145void enternotify(XEvent *e);
146void eprint(const char *errstr, ...);
147void expose(XEvent *e);
148void focus(Client *c);
149void focusin(XEvent *e);
150void focusnext(const char *arg);
151void focusprev(const char *arg);
152Client *getclient(Window w);
153unsigned long getcolor(const char *colstr);
154long getstate(Window w);
155Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
156void grabbuttons(Client *c, Bool focused);
157void grabkeys(void);
158unsigned int idxoftag(const char *t);
159void initfont(const char *fontstr);
160Bool isoccupied(unsigned int t);
161Bool isprotodel(Client *c);
162Bool isurgent(unsigned int t);
163Bool isvisible(Client *c);
164void keypress(XEvent *e);
165void killclient(const char *arg);
166void manage(Window w, XWindowAttributes *wa);
167void mappingnotify(XEvent *e);
168void maprequest(XEvent *e);
169void monocle(void);
170void movemouse(Client *c);
171Client *nexttiled(Client *c);
172void propertynotify(XEvent *e);
173void quit(const char *arg);
174void reapply(const char *arg);
175void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
176void resizemouse(Client *c);
177void restack(void);
178void run(void);
179void scan(void);
180void setclientstate(Client *c, long state);
181void setgeom(const char *arg);
182void setlayout(const char *arg);
183void setmfact(const char *arg);
184void setup(void);
185void spawn(const char *arg);
186void tag(const char *arg);
187unsigned int textnw(const char *text, unsigned int len);
188unsigned int textw(const char *text);
189void tileh(void);
190void tilehstack(unsigned int n);
191Client *tilemaster(unsigned int n);
192void tileresize(Client *c, int x, int y, int w, int h);
193void tilev(void);
194void tilevstack(unsigned int n);
195void togglefloating(const char *arg);
196void toggletag(const char *arg);
197void toggleview(const char *arg);
198void unban(Client *c);
199void unmanage(Client *c);
200void unmapnotify(XEvent *e);
201void updatebarpos(void);
202void updatesizehints(Client *c);
203void updatetitle(Client *c);
204void updatewmhints(Client *c);
205void view(const char *arg);
206void viewprevtag(const char *arg); /* views previous selected tags */
207int xerror(Display *dpy, XErrorEvent *ee);
208int xerrordummy(Display *dpy, XErrorEvent *ee);
209int xerrorstart(Display *dpy, XErrorEvent *ee);
210void zoom(const char *arg);
211
212/* variables */
213char stext[256];
214int screen, sx, sy, sw, sh;
215int (*xerrorxlib)(Display *, XErrorEvent *);
216int bx, by, bw, bh, blw, bgw, mx, my, mw, mh, mox, moy, mow, moh, tx, ty, tw, th, wx, wy, ww, wh;
217int seltags = 0;
218double mfact;
219unsigned int numlockmask = 0;
220void (*handler[LASTEvent]) (XEvent *) = {
221 [ButtonPress] = buttonpress,
222 [ConfigureRequest] = configurerequest,
223 [ConfigureNotify] = configurenotify,
224 [DestroyNotify] = destroynotify,
225 [EnterNotify] = enternotify,
226 [Expose] = expose,
227 [FocusIn] = focusin,
228 [KeyPress] = keypress,
229 [MappingNotify] = mappingnotify,
230 [MapRequest] = maprequest,
231 [PropertyNotify] = propertynotify,
232 [UnmapNotify] = unmapnotify
233};
234Atom wmatom[WMLast], netatom[NetLast];
235Bool otherwm, readin;
236Bool running = True;
237Bool *tagset[2];
238Client *clients = NULL;
239Client *sel = NULL;
240Client *stack = NULL;
241Cursor cursor[CurLast];
242Display *dpy;
243DC dc = {0};
244Window root, barwin;
245
246/* configuration, allows nested code to access above variables */
247#include "config.h"
248#define TAGSZ (LENGTH(tags) * sizeof(Bool))
249Layout *lt = layouts;
250Geom *geom = geoms;
251
252/* function implementations */
253
254void
255applyrules(Client *c) {
256 unsigned int i;
257 Bool matched = False;
258 Rule *r;
259 XClassHint ch = { 0 };
260
261 /* rule matching */
262 XGetClassHint(dpy, c->win, &ch);
263 for(i = 0; i < LENGTH(rules); i++) {
264 r = &rules[i];
265 if((!r->title || strstr(c->name, r->title))
266 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
267 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
268 c->isfloating = r->isfloating;
269 if(r->tag) {
270 c->tags[idxoftag(r->tag)] = True;
271 matched = True;
272 }
273 }
274 }
275 if(ch.res_class)
276 XFree(ch.res_class);
277 if(ch.res_name)
278 XFree(ch.res_name);
279 if(!matched)
280 memcpy(c->tags, tagset[seltags], TAGSZ);
281}
282
283void
284arrange(void) {
285 Client *c;
286
287 for(c = clients; c; c = c->next)
288 if(isvisible(c)) {
289 unban(c);
290 if(lt->isfloating || c->isfloating)
291 resize(c, c->fx, c->fy, c->fw, c->fh, True);
292 }
293 else
294 ban(c);
295
296 focus(NULL);
297 if(lt->arrange)
298 lt->arrange();
299 restack();
300}
301
302void
303attach(Client *c) {
304 if(clients)
305 clients->prev = c;
306 c->next = clients;
307 clients = c;
308}
309
310void
311attachstack(Client *c) {
312 c->snext = stack;
313 stack = c;
314}
315
316void
317ban(Client *c) {
318 if(c->isbanned)
319 return;
320 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
321 c->isbanned = True;
322}
323
324void
325buttonpress(XEvent *e) {
326 unsigned int i, x;
327 Client *c;
328 XButtonPressedEvent *ev = &e->xbutton;
329
330 if(ev->window == barwin) {
331 if((ev->x < bgw) && ev->button == Button1) {
332 setgeom(NULL);
333 return;
334 }
335 x = bgw;
336 for(i = 0; i < LENGTH(tags); i++) {
337 x += textw(tags[i]);
338 if(ev->x >= bgw && ev->x < x) {
339 if(ev->button == Button1) {
340 if(ev->state & MODKEY)
341 tag(tags[i]);
342 else
343 view(tags[i]);
344 }
345 else if(ev->button == Button3) {
346 if(ev->state & MODKEY)
347 toggletag(tags[i]);
348 else
349 toggleview(tags[i]);
350 }
351 return;
352 }
353 }
354 if((ev->x < x + blw) && ev->button == Button1)
355 setlayout(NULL);
356 }
357 else if((c = getclient(ev->window))) {
358 focus(c);
359 if(CLEANMASK(ev->state) != MODKEY)
360 return;
361 if(ev->button == Button1) {
362 restack();
363 movemouse(c);
364 }
365 else if(ev->button == Button2) {
366 if(!lt->isfloating && c->isfloating)
367 togglefloating(NULL);
368 else
369 zoom(NULL);
370 }
371 else if(ev->button == Button3 && !c->isfixed) {
372 restack();
373 resizemouse(c);
374 }
375 }
376}
377
378void
379checkotherwm(void) {
380 otherwm = False;
381 XSetErrorHandler(xerrorstart);
382
383 /* this causes an error if some other window manager is running */
384 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
385 XSync(dpy, False);
386 if(otherwm)
387 eprint("dwm: another window manager is already running\n");
388 XSync(dpy, False);
389 XSetErrorHandler(NULL);
390 xerrorxlib = XSetErrorHandler(xerror);
391 XSync(dpy, False);
392}
393
394void
395cleanup(void) {
396 close(STDIN_FILENO);
397 while(stack) {
398 unban(stack);
399 unmanage(stack);
400 }
401 if(dc.font.set)
402 XFreeFontSet(dpy, dc.font.set);
403 else
404 XFreeFont(dpy, dc.font.xfont);
405 XUngrabKey(dpy, AnyKey, AnyModifier, root);
406 XFreePixmap(dpy, dc.drawable);
407 XFreeGC(dpy, dc.gc);
408 XFreeCursor(dpy, cursor[CurNormal]);
409 XFreeCursor(dpy, cursor[CurResize]);
410 XFreeCursor(dpy, cursor[CurMove]);
411 XDestroyWindow(dpy, barwin);
412 XSync(dpy, False);
413 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
414}
415
416void
417configure(Client *c) {
418 XConfigureEvent ce;
419
420 ce.type = ConfigureNotify;
421 ce.display = dpy;
422 ce.event = c->win;
423 ce.window = c->win;
424 ce.x = c->x;
425 ce.y = c->y;
426 ce.width = c->w;
427 ce.height = c->h;
428 ce.border_width = c->bw;
429 ce.above = None;
430 ce.override_redirect = False;
431 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
432}
433
434void
435configurenotify(XEvent *e) {
436 XConfigureEvent *ev = &e->xconfigure;
437
438 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
439 sw = ev->width;
440 sh = ev->height;
441 setgeom(geom->symbol);
442 }
443}
444
445void
446configurerequest(XEvent *e) {
447 Client *c;
448 XConfigureRequestEvent *ev = &e->xconfigurerequest;
449 XWindowChanges wc;
450
451 if((c = getclient(ev->window))) {
452 if(ev->value_mask & CWBorderWidth)
453 c->bw = ev->border_width;
454 if(c->isfixed || c->isfloating || lt->isfloating) {
455 if(ev->value_mask & CWX)
456 c->x = sx + ev->x;
457 if(ev->value_mask & CWY)
458 c->y = sy + ev->y;
459 if(ev->value_mask & CWWidth)
460 c->w = ev->width;
461 if(ev->value_mask & CWHeight)
462 c->h = ev->height;
463 if((c->x - sx + c->w) > sw && c->isfloating)
464 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
465 if((c->y - sy + c->h) > sh && c->isfloating)
466 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
467 if((ev->value_mask & (CWX|CWY))
468 && !(ev->value_mask & (CWWidth|CWHeight)))
469 configure(c);
470 if(isvisible(c))
471 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
472 }
473 else
474 configure(c);
475 }
476 else {
477 wc.x = ev->x;
478 wc.y = ev->y;
479 wc.width = ev->width;
480 wc.height = ev->height;
481 wc.border_width = ev->border_width;
482 wc.sibling = ev->above;
483 wc.stack_mode = ev->detail;
484 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
485 }
486 XSync(dpy, False);
487}
488
489unsigned int
490counttiled(void) {
491 unsigned int n;
492 Client *c;
493
494 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
495 return n;
496}
497
498void
499destroynotify(XEvent *e) {
500 Client *c;
501 XDestroyWindowEvent *ev = &e->xdestroywindow;
502
503 if((c = getclient(ev->window)))
504 unmanage(c);
505}
506
507void
508detach(Client *c) {
509 if(c->prev)
510 c->prev->next = c->next;
511 if(c->next)
512 c->next->prev = c->prev;
513 if(c == clients)
514 clients = c->next;
515 c->next = c->prev = NULL;
516}
517
518void
519detachstack(Client *c) {
520 Client **tc;
521
522 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
523 *tc = c->snext;
524}
525
526void
527drawbar(void) {
528 int i, x;
529 Client *c;
530
531 dc.x = 0;
532 if(bgw > 0) {
533 dc.w = bgw;
534 drawtext(geom->symbol, dc.norm, False);
535 dc.x += bgw;
536 }
537 for(c = stack; c && !isvisible(c); c = c->snext);
538 for(i = 0; i < LENGTH(tags); i++) {
539 dc.w = textw(tags[i]);
540 if(tagset[seltags][i]) {
541 drawtext(tags[i], dc.sel, isurgent(i));
542 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
543 }
544 else {
545 drawtext(tags[i], dc.norm, isurgent(i));
546 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
547 }
548 dc.x += dc.w;
549 }
550 if(blw > 0) {
551 dc.w = blw;
552 drawtext(lt->symbol, dc.norm, False);
553 x = dc.x + dc.w;
554 }
555 else
556 x = dc.x;
557 dc.w = textw(stext);
558 dc.x = bw - dc.w;
559 if(dc.x < x) {
560 dc.x = x;
561 dc.w = bw - x;
562 }
563 drawtext(stext, dc.norm, False);
564 if((dc.w = dc.x - x) > bh) {
565 dc.x = x;
566 if(c) {
567 drawtext(c->name, dc.sel, False);
568 drawsquare(False, c->isfloating, False, dc.sel);
569 }
570 else
571 drawtext(NULL, dc.norm, False);
572 }
573 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
574 XSync(dpy, False);
575}
576
577void
578drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
579 int x;
580 XGCValues gcv;
581 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
582
583 gcv.foreground = col[invert ? ColBG : ColFG];
584 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
585 x = (dc.font.ascent + dc.font.descent + 2) / 4;
586 r.x = dc.x + 1;
587 r.y = dc.y + 1;
588 if(filled) {
589 r.width = r.height = x + 1;
590 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
591 }
592 else if(empty) {
593 r.width = r.height = x;
594 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
595 }
596}
597
598void
599drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
600 int x, y, w, h;
601 unsigned int len, olen;
602 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
603 char buf[256];
604
605 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
606 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
607 if(!text)
608 return;
609 olen = strlen(text);
610 len = MIN(olen, sizeof buf);
611 memcpy(buf, text, len);
612 w = 0;
613 h = dc.font.ascent + dc.font.descent;
614 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
615 x = dc.x + (h / 2);
616 /* shorten text if necessary */
617 for(; len && (w = textnw(buf, len)) > dc.w - h; len--);
618 if (!len)
619 return;
620 if(len < olen) {
621 if(len > 1)
622 buf[len - 1] = '.';
623 if(len > 2)
624 buf[len - 2] = '.';
625 if(len > 3)
626 buf[len - 3] = '.';
627 }
628 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
629 if(dc.font.set)
630 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
631 else
632 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
633}
634
635void *
636emallocz(unsigned int size) {
637 void *res = calloc(1, size);
638
639 if(!res)
640 eprint("fatal: could not malloc() %u bytes\n", size);
641 return res;
642}
643
644void
645enternotify(XEvent *e) {
646 Client *c;
647 XCrossingEvent *ev = &e->xcrossing;
648
649 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
650 return;
651 if((c = getclient(ev->window)))
652 focus(c);
653 else
654 focus(NULL);
655}
656
657void
658eprint(const char *errstr, ...) {
659 va_list ap;
660
661 va_start(ap, errstr);
662 vfprintf(stderr, errstr, ap);
663 va_end(ap);
664 exit(EXIT_FAILURE);
665}
666
667void
668expose(XEvent *e) {
669 XExposeEvent *ev = &e->xexpose;
670
671 if(ev->count == 0 && (ev->window == barwin))
672 drawbar();
673}
674
675void
676focus(Client *c) {
677 if(!c || (c && !isvisible(c)))
678 for(c = stack; c && !isvisible(c); c = c->snext);
679 if(sel && sel != c) {
680 grabbuttons(sel, False);
681 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
682 }
683 if(c) {
684 detachstack(c);
685 attachstack(c);
686 grabbuttons(c, True);
687 }
688 sel = c;
689 if(c) {
690 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
691 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
692 }
693 else
694 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
695 drawbar();
696}
697
698void
699focusin(XEvent *e) { /* there are some broken focus acquiring clients */
700 XFocusChangeEvent *ev = &e->xfocus;
701
702 if(sel && ev->window != sel->win)
703 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
704}
705
706void
707focusnext(const char *arg) {
708 Client *c;
709
710 if(!sel)
711 return;
712 for(c = sel->next; c && !isvisible(c); c = c->next);
713 if(!c)
714 for(c = clients; c && !isvisible(c); c = c->next);
715 if(c) {
716 focus(c);
717 restack();
718 }
719}
720
721void
722focusprev(const char *arg) {
723 Client *c;
724
725 if(!sel)
726 return;
727 for(c = sel->prev; c && !isvisible(c); c = c->prev);
728 if(!c) {
729 for(c = clients; c && c->next; c = c->next);
730 for(; c && !isvisible(c); c = c->prev);
731 }
732 if(c) {
733 focus(c);
734 restack();
735 }
736}
737
738Client *
739getclient(Window w) {
740 Client *c;
741
742 for(c = clients; c && c->win != w; c = c->next);
743 return c;
744}
745
746unsigned long
747getcolor(const char *colstr) {
748 Colormap cmap = DefaultColormap(dpy, screen);
749 XColor color;
750
751 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
752 eprint("error, cannot allocate color '%s'\n", colstr);
753 return color.pixel;
754}
755
756long
757getstate(Window w) {
758 int format, status;
759 long result = -1;
760 unsigned char *p = NULL;
761 unsigned long n, extra;
762 Atom real;
763
764 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
765 &real, &format, &n, &extra, (unsigned char **)&p);
766 if(status != Success)
767 return -1;
768 if(n != 0)
769 result = *p;
770 XFree(p);
771 return result;
772}
773
774Bool
775gettextprop(Window w, Atom atom, char *text, unsigned int size) {
776 char **list = NULL;
777 int n;
778 XTextProperty name;
779
780 if(!text || size == 0)
781 return False;
782 text[0] = '\0';
783 XGetTextProperty(dpy, w, &name, atom);
784 if(!name.nitems)
785 return False;
786 if(name.encoding == XA_STRING)
787 strncpy(text, (char *)name.value, size - 1);
788 else {
789 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
790 && n > 0 && *list) {
791 strncpy(text, *list, size - 1);
792 XFreeStringList(list);
793 }
794 }
795 text[size - 1] = '\0';
796 XFree(name.value);
797 return True;
798}
799
800void
801grabbuttons(Client *c, Bool focused) {
802 int i, j;
803 unsigned int buttons[] = { Button1, Button2, Button3 };
804 unsigned int modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask,
805 MODKEY|numlockmask|LockMask} ;
806
807 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
808 if(focused)
809 for(i = 0; i < LENGTH(buttons); i++)
810 for(j = 0; j < LENGTH(modifiers); j++)
811 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
812 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
813 else
814 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
815 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
816}
817
818void
819grabkeys(void) {
820 unsigned int i, j;
821 KeyCode code;
822 XModifierKeymap *modmap;
823
824 /* init modifier map */
825 modmap = XGetModifierMapping(dpy);
826 for(i = 0; i < 8; i++)
827 for(j = 0; j < modmap->max_keypermod; j++) {
828 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
829 numlockmask = (1 << i);
830 }
831 XFreeModifiermap(modmap);
832
833 XUngrabKey(dpy, AnyKey, AnyModifier, root);
834 for(i = 0; i < LENGTH(keys); i++) {
835 code = XKeysymToKeycode(dpy, keys[i].keysym);
836 XGrabKey(dpy, code, keys[i].mod, root, True,
837 GrabModeAsync, GrabModeAsync);
838 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
839 GrabModeAsync, GrabModeAsync);
840 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
841 GrabModeAsync, GrabModeAsync);
842 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
843 GrabModeAsync, GrabModeAsync);
844 }
845}
846
847unsigned int
848idxoftag(const char *t) {
849 unsigned int i;
850
851 for(i = 0; (i < LENGTH(tags)) && t && strcmp(tags[i], t); i++);
852 return (i < LENGTH(tags)) ? i : 0;
853}
854
855void
856initfont(const char *fontstr) {
857 char *def, **missing;
858 int i, n;
859
860 missing = NULL;
861 if(dc.font.set)
862 XFreeFontSet(dpy, dc.font.set);
863 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
864 if(missing) {
865 while(n--)
866 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
867 XFreeStringList(missing);
868 }
869 if(dc.font.set) {
870 XFontSetExtents *font_extents;
871 XFontStruct **xfonts;
872 char **font_names;
873 dc.font.ascent = dc.font.descent = 0;
874 font_extents = XExtentsOfFontSet(dc.font.set);
875 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
876 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
877 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
878 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
879 xfonts++;
880 }
881 }
882 else {
883 if(dc.font.xfont)
884 XFreeFont(dpy, dc.font.xfont);
885 dc.font.xfont = NULL;
886 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
887 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
888 eprint("error, cannot load font: '%s'\n", fontstr);
889 dc.font.ascent = dc.font.xfont->ascent;
890 dc.font.descent = dc.font.xfont->descent;
891 }
892 dc.font.height = dc.font.ascent + dc.font.descent;
893}
894
895Bool
896isoccupied(unsigned int t) {
897 Client *c;
898
899 for(c = clients; c; c = c->next)
900 if(c->tags[t])
901 return True;
902 return False;
903}
904
905Bool
906isprotodel(Client *c) {
907 int i, n;
908 Atom *protocols;
909 Bool ret = False;
910
911 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
912 for(i = 0; !ret && i < n; i++)
913 if(protocols[i] == wmatom[WMDelete])
914 ret = True;
915 XFree(protocols);
916 }
917 return ret;
918}
919
920Bool
921isurgent(unsigned int t) {
922 Client *c;
923
924 for(c = clients; c; c = c->next)
925 if(c->isurgent && c->tags[t])
926 return True;
927 return False;
928}
929
930Bool
931isvisible(Client *c) {
932 unsigned int i;
933
934 for(i = 0; i < LENGTH(tags); i++)
935 if(c->tags[i] && tagset[seltags][i])
936 return True;
937 return False;
938}
939
940void
941keypress(XEvent *e) {
942 unsigned int i;
943 KeySym keysym;
944 XKeyEvent *ev;
945
946 ev = &e->xkey;
947 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
948 for(i = 0; i < LENGTH(keys); i++)
949 if(keysym == keys[i].keysym
950 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
951 {
952 if(keys[i].func)
953 keys[i].func(keys[i].arg);
954 }
955}
956
957void
958killclient(const char *arg) {
959 XEvent ev;
960
961 if(!sel)
962 return;
963 if(isprotodel(sel)) {
964 ev.type = ClientMessage;
965 ev.xclient.window = sel->win;
966 ev.xclient.message_type = wmatom[WMProtocols];
967 ev.xclient.format = 32;
968 ev.xclient.data.l[0] = wmatom[WMDelete];
969 ev.xclient.data.l[1] = CurrentTime;
970 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
971 }
972 else
973 XKillClient(dpy, sel->win);
974}
975
976void
977manage(Window w, XWindowAttributes *wa) {
978 Client *c, *t = NULL;
979 Status rettrans;
980 Window trans;
981 XWindowChanges wc;
982
983 c = emallocz(sizeof(Client));
984 c->tags = emallocz(TAGSZ);
985 c->win = w;
986
987 /* geometry */
988 c->x = wa->x;
989 c->y = wa->y;
990 c->w = c->fw = wa->width;
991 c->h = c->fh = wa->height;
992 c->oldbw = wa->border_width;
993 if(c->w == sw && c->h == sh) {
994 c->x = sx;
995 c->y = sy;
996 c->bw = wa->border_width;
997 }
998 else {
999 if(c->x + c->w + 2 * c->bw > wx + ww)
1000 c->x = wx + ww - c->w - 2 * c->bw;
1001 if(c->y + c->h + 2 * c->bw > wy + wh)
1002 c->y = wy + wh - c->h - 2 * c->bw;
1003 c->x = MAX(c->x, wx);
1004 c->y = MAX(c->y, wy);
1005 c->bw = BORDERPX;
1006 }
1007 c->fx = c->x;
1008 c->fy = c->y;
1009
1010 wc.border_width = c->bw;
1011 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1012 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1013 configure(c); /* propagates border_width, if size doesn't change */
1014 updatesizehints(c);
1015 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1016 grabbuttons(c, False);
1017 updatetitle(c);
1018 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1019 for(t = clients; t && t->win != trans; t = t->next);
1020 if(t)
1021 memcpy(c->tags, t->tags, TAGSZ);
1022 else
1023 applyrules(c);
1024 if(!c->isfloating)
1025 c->isfloating = (rettrans == Success) || c->isfixed;
1026 attach(c);
1027 attachstack(c);
1028 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1029 ban(c);
1030 XMapWindow(dpy, c->win);
1031 setclientstate(c, NormalState);
1032 arrange();
1033}
1034
1035void
1036mappingnotify(XEvent *e) {
1037 XMappingEvent *ev = &e->xmapping;
1038
1039 XRefreshKeyboardMapping(ev);
1040 if(ev->request == MappingKeyboard)
1041 grabkeys();
1042}
1043
1044void
1045maprequest(XEvent *e) {
1046 static XWindowAttributes wa;
1047 XMapRequestEvent *ev = &e->xmaprequest;
1048
1049 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1050 return;
1051 if(wa.override_redirect)
1052 return;
1053 if(!getclient(ev->window))
1054 manage(ev->window, &wa);
1055}
1056
1057void
1058monocle(void) {
1059 Client *c;
1060
1061 for(c = clients; c; c = c->next)
1062 if((lt->isfloating || !c->isfloating) && isvisible(c))
1063 resize(c, mox, moy, mow - 2 * c->bw, moh - 2 * c->bw, RESIZEHINTS);
1064}
1065
1066void
1067movemouse(Client *c) {
1068 int x1, y1, ocx, ocy, di, nx, ny;
1069 unsigned int dui;
1070 Window dummy;
1071 XEvent ev;
1072
1073 ocx = nx = c->x;
1074 ocy = ny = c->y;
1075 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1076 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1077 return;
1078 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1079 for(;;) {
1080 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1081 switch (ev.type) {
1082 case ButtonRelease:
1083 XUngrabPointer(dpy, CurrentTime);
1084 return;
1085 case ConfigureRequest:
1086 case Expose:
1087 case MapRequest:
1088 handler[ev.type](&ev);
1089 break;
1090 case MotionNotify:
1091 XSync(dpy, False);
1092 nx = ocx + (ev.xmotion.x - x1);
1093 ny = ocy + (ev.xmotion.y - y1);
1094 if(abs(wx - nx) < SNAP)
1095 nx = wx;
1096 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < SNAP)
1097 nx = wx + ww - c->w - 2 * c->bw;
1098 if(abs(wy - ny) < SNAP)
1099 ny = wy;
1100 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < SNAP)
1101 ny = wy + wh - c->h - 2 * c->bw;
1102 if(!c->isfloating && !lt->isfloating && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1103 togglefloating(NULL);
1104 if(lt->isfloating || c->isfloating) {
1105 c->fx = nx;
1106 c->fy = ny;
1107 resize(c, nx, ny, c->w, c->h, False);
1108 }
1109 break;
1110 }
1111 }
1112}
1113
1114Client *
1115nexttiled(Client *c) {
1116 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1117 return c;
1118}
1119
1120void
1121propertynotify(XEvent *e) {
1122 Client *c;
1123 Window trans;
1124 XPropertyEvent *ev = &e->xproperty;
1125
1126 if(ev->state == PropertyDelete)
1127 return; /* ignore */
1128 if((c = getclient(ev->window))) {
1129 switch (ev->atom) {
1130 default: break;
1131 case XA_WM_TRANSIENT_FOR:
1132 XGetTransientForHint(dpy, c->win, &trans);
1133 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1134 arrange();
1135 break;
1136 case XA_WM_NORMAL_HINTS:
1137 updatesizehints(c);
1138 break;
1139 case XA_WM_HINTS:
1140 updatewmhints(c);
1141 drawbar();
1142 break;
1143 }
1144 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1145 updatetitle(c);
1146 if(c == sel)
1147 drawbar();
1148 }
1149 }
1150}
1151
1152void
1153quit(const char *arg) {
1154 readin = running = False;
1155}
1156
1157void
1158reapply(const char *arg) {
1159 Client *c;
1160
1161 for(c = clients; c; c = c->next) {
1162 memset(c->tags, 0, TAGSZ);
1163 applyrules(c);
1164 }
1165 arrange();
1166}
1167
1168void
1169resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1170 XWindowChanges wc;
1171
1172 if(sizehints) {
1173 /* set minimum possible */
1174 w = MAX(1, w);
1175 h = MAX(1, h);
1176
1177 /* temporarily remove base dimensions */
1178 w -= c->basew;
1179 h -= c->baseh;
1180
1181 /* adjust for aspect limits */
1182 if(c->minax != c->maxax && c->minay != c->maxay
1183 && c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0)
1184 {
1185 if(w * c->maxay > h * c->maxax)
1186 w = h * c->maxax / c->maxay;
1187 else if(w * c->minay < h * c->minax)
1188 h = w * c->minay / c->minax;
1189 }
1190
1191 /* adjust for increment value */
1192 if(c->incw)
1193 w -= w % c->incw;
1194 if(c->inch)
1195 h -= h % c->inch;
1196
1197 /* restore base dimensions */
1198 w += c->basew;
1199 h += c->baseh;
1200
1201 w = MAX(w, c->minw);
1202 h = MAX(h, c->minh);
1203
1204 if (c->maxw)
1205 w = MIN(w, c->maxw);
1206
1207 if (c->maxh)
1208 h = MIN(h, c->maxh);
1209 }
1210 if(w <= 0 || h <= 0)
1211 return;
1212 if(x > sx + sw)
1213 x = sw - w - 2 * c->bw;
1214 if(y > sy + sh)
1215 y = sh - h - 2 * c->bw;
1216 if(x + w + 2 * c->bw < sx)
1217 x = sx;
1218 if(y + h + 2 * c->bw < sy)
1219 y = sy;
1220 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1221 c->x = wc.x = x;
1222 c->y = wc.y = y;
1223 c->w = wc.width = w;
1224 c->h = wc.height = h;
1225 wc.border_width = c->bw;
1226 XConfigureWindow(dpy, c->win,
1227 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1228 configure(c);
1229 XSync(dpy, False);
1230 }
1231}
1232
1233void
1234resizemouse(Client *c) {
1235 int ocx, ocy;
1236 int nw, nh;
1237 XEvent ev;
1238
1239 ocx = c->x;
1240 ocy = c->y;
1241 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1242 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1243 return;
1244 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1245 for(;;) {
1246 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1247 switch(ev.type) {
1248 case ButtonRelease:
1249 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1250 c->w + c->bw - 1, c->h + c->bw - 1);
1251 XUngrabPointer(dpy, CurrentTime);
1252 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1253 return;
1254 case ConfigureRequest:
1255 case Expose:
1256 case MapRequest:
1257 handler[ev.type](&ev);
1258 break;
1259 case MotionNotify:
1260 XSync(dpy, False);
1261 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1262 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1263 if(!c->isfloating && !lt->isfloating && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP)) {
1264 c->fx = c->x;
1265 c->fy = c->y;
1266 togglefloating(NULL);
1267 }
1268 if((lt->isfloating) || c->isfloating) {
1269 resize(c, c->x, c->y, nw, nh, True);
1270 c->fw = nw;
1271 c->fh = nh;
1272 }
1273 break;
1274 }
1275 }
1276}
1277
1278void
1279restack(void) {
1280 Client *c;
1281 XEvent ev;
1282 XWindowChanges wc;
1283
1284 drawbar();
1285 if(!sel)
1286 return;
1287 if(sel->isfloating || lt->isfloating)
1288 XRaiseWindow(dpy, sel->win);
1289 if(!lt->isfloating) {
1290 wc.stack_mode = Below;
1291 wc.sibling = barwin;
1292 for(c = stack; c; c = c->snext)
1293 if(!c->isfloating && isvisible(c)) {
1294 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1295 wc.sibling = c->win;
1296 }
1297 }
1298 XSync(dpy, False);
1299 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1300}
1301
1302void
1303run(void) {
1304 char *p;
1305 char sbuf[sizeof stext];
1306 fd_set rd;
1307 int r, xfd;
1308 unsigned int len, offset;
1309 XEvent ev;
1310
1311 /* main event loop, also reads status text from stdin */
1312 XSync(dpy, False);
1313 xfd = ConnectionNumber(dpy);
1314 readin = True;
1315 offset = 0;
1316 len = sizeof stext - 1;
1317 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1318 while(running) {
1319 FD_ZERO(&rd);
1320 if(readin)
1321 FD_SET(STDIN_FILENO, &rd);
1322 FD_SET(xfd, &rd);
1323 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1324 if(errno == EINTR)
1325 continue;
1326 eprint("select failed\n");
1327 }
1328 if(FD_ISSET(STDIN_FILENO, &rd)) {
1329 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1330 case -1:
1331 strncpy(stext, strerror(errno), len);
1332 readin = False;
1333 break;
1334 case 0:
1335 strncpy(stext, "EOF", 4);
1336 readin = False;
1337 break;
1338 default:
1339 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1340 if(*p == '\n' || *p == '\0') {
1341 *p = '\0';
1342 strncpy(stext, sbuf, len);
1343 p += r - 1; /* p is sbuf + offset + r - 1 */
1344 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1345 offset = r;
1346 if(r)
1347 memmove(sbuf, p - r + 1, r);
1348 break;
1349 }
1350 break;
1351 }
1352 drawbar();
1353 }
1354 while(XPending(dpy)) {
1355 XNextEvent(dpy, &ev);
1356 if(handler[ev.type])
1357 (handler[ev.type])(&ev); /* call handler */
1358 }
1359 }
1360}
1361
1362void
1363scan(void) {
1364 unsigned int i, num;
1365 Window *wins, d1, d2;
1366 XWindowAttributes wa;
1367
1368 wins = NULL;
1369 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1370 for(i = 0; i < num; i++) {
1371 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1372 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1373 continue;
1374 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1375 manage(wins[i], &wa);
1376 }
1377 for(i = 0; i < num; i++) { /* now the transients */
1378 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1379 continue;
1380 if(XGetTransientForHint(dpy, wins[i], &d1)
1381 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1382 manage(wins[i], &wa);
1383 }
1384 }
1385 if(wins)
1386 XFree(wins);
1387}
1388
1389void
1390setclientstate(Client *c, long state) {
1391 long data[] = {state, None};
1392
1393 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1394 PropModeReplace, (unsigned char *)data, 2);
1395}
1396
1397void
1398setgeom(const char *arg) {
1399 unsigned int i;
1400
1401 if(!arg) {
1402 if(++geom == &geoms[LENGTH(geoms)])
1403 geom = &geoms[0];
1404 }
1405 else {
1406 for(i = 0; i < LENGTH(geoms); i++)
1407 if(!strcmp(geoms[i].symbol, arg))
1408 break;
1409 if(i == LENGTH(geoms))
1410 return;
1411 geom = &geoms[i];
1412 }
1413 geom->apply();
1414 updatebarpos();
1415 arrange();
1416}
1417
1418void
1419setlayout(const char *arg) {
1420 unsigned int i;
1421
1422 if(!arg) {
1423 if(++lt == &layouts[LENGTH(layouts)])
1424 lt = &layouts[0];
1425 }
1426 else {
1427 for(i = 0; i < LENGTH(layouts); i++)
1428 if(!strcmp(arg, layouts[i].symbol))
1429 break;
1430 if(i == LENGTH(layouts))
1431 return;
1432 lt = &layouts[i];
1433 }
1434 if(sel)
1435 arrange();
1436 else
1437 drawbar();
1438}
1439
1440void
1441setmfact(const char *arg) {
1442 double d;
1443
1444 if(lt->isfloating)
1445 return;
1446 if(!arg)
1447 mfact = MFACT;
1448 else {
1449 d = strtod(arg, NULL);
1450 if(arg[0] == '-' || arg[0] == '+')
1451 d += mfact;
1452 if(d < 0.1 || d > 0.9)
1453 return;
1454 mfact = d;
1455 }
1456 setgeom(geom->symbol);
1457}
1458
1459void
1460setup(void) {
1461 unsigned int i, w;
1462 XSetWindowAttributes wa;
1463
1464 /* init screen */
1465 screen = DefaultScreen(dpy);
1466 root = RootWindow(dpy, screen);
1467 initfont(FONT);
1468
1469 /* apply default geometry */
1470 sx = 0;
1471 sy = 0;
1472 sw = DisplayWidth(dpy, screen);
1473 sh = DisplayHeight(dpy, screen);
1474 bh = dc.font.height + 2;
1475 mfact = MFACT;
1476 geom->apply();
1477
1478 /* init atoms */
1479 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1480 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1481 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1482 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1483 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1484 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1485
1486 /* init cursors */
1487 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1488 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1489 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1490
1491 /* init appearance */
1492 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1493 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1494 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1495 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1496 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1497 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1498 initfont(FONT);
1499 dc.h = bh;
1500 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1501 dc.gc = XCreateGC(dpy, root, 0, 0);
1502 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1503 if(!dc.font.set)
1504 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1505
1506 /* init tags */
1507 tagset[0] = emallocz(TAGSZ);
1508 tagset[1] = emallocz(TAGSZ);
1509 tagset[0][0] = tagset[1][0] = True;
1510
1511 /* init bar */
1512 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1513 w = textw(layouts[i].symbol);
1514 blw = MAX(blw, w);
1515 }
1516 for(bgw = i = 0; LENGTH(geoms) > 1 && i < LENGTH(geoms); i++) {
1517 w = textw(geoms[i].symbol);
1518 bgw = MAX(bgw, w);
1519 }
1520
1521 wa.override_redirect = 1;
1522 wa.background_pixmap = ParentRelative;
1523 wa.event_mask = ButtonPressMask|ExposureMask;
1524
1525 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1526 CopyFromParent, DefaultVisual(dpy, screen),
1527 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1528 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1529 XMapRaised(dpy, barwin);
1530 strcpy(stext, "dwm-"VERSION);
1531 drawbar();
1532
1533 /* EWMH support per view */
1534 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1535 PropModeReplace, (unsigned char *) netatom, NetLast);
1536
1537 /* select for events */
1538 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1539 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1540 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1541 XSelectInput(dpy, root, wa.event_mask);
1542
1543
1544 /* grab keys */
1545 grabkeys();
1546}
1547
1548void
1549spawn(const char *arg) {
1550 static char *shell = NULL;
1551
1552 if(!shell && !(shell = getenv("SHELL")))
1553 shell = "/bin/sh";
1554 if(!arg)
1555 return;
1556 /* The double-fork construct avoids zombie processes and keeps the code
1557 * clean from stupid signal handlers. */
1558 if(fork() == 0) {
1559 if(fork() == 0) {
1560 if(dpy)
1561 close(ConnectionNumber(dpy));
1562 setsid();
1563 execl(shell, shell, "-c", arg, (char *)NULL);
1564 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1565 perror(" failed");
1566 }
1567 exit(0);
1568 }
1569 wait(0);
1570}
1571
1572void
1573tag(const char *arg) {
1574 unsigned int i;
1575
1576 if(!sel)
1577 return;
1578 for(i = 0; i < LENGTH(tags); i++)
1579 sel->tags[i] = (NULL == arg);
1580 sel->tags[idxoftag(arg)] = True;
1581 arrange();
1582}
1583
1584unsigned int
1585textnw(const char *text, unsigned int len) {
1586 XRectangle r;
1587
1588 if(dc.font.set) {
1589 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1590 return r.width;
1591 }
1592 return XTextWidth(dc.font.xfont, text, len);
1593}
1594
1595unsigned int
1596textw(const char *text) {
1597 return textnw(text, strlen(text)) + dc.font.height;
1598}
1599
1600void
1601tileh(void) {
1602 int x, w;
1603 unsigned int i, n = counttiled();
1604 Client *c;
1605
1606 if(n == 0)
1607 return;
1608 c = tilemaster(n);
1609 if(--n == 0)
1610 return;
1611
1612 x = tx;
1613 w = tw / n;
1614 if(w < bh)
1615 w = tw;
1616
1617 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1618 if(i + 1 == n) /* remainder */
1619 tileresize(c, x, ty, (tx + tw) - x - 2 * c->bw, th - 2 * c->bw);
1620 else
1621 tileresize(c, x, ty, w - 2 * c->bw, th - 2 * c->bw);
1622 if(w != tw)
1623 x = c->x + c->w + 2 * c->bw;
1624 }
1625}
1626
1627Client *
1628tilemaster(unsigned int n) {
1629 Client *c = nexttiled(clients);
1630
1631 if(n == 1)
1632 tileresize(c, mox, moy, mow - 2 * c->bw, moh - 2 * c->bw);
1633 else
1634 tileresize(c, mx, my, mw - 2 * c->bw, mh - 2 * c->bw);
1635 return c;
1636}
1637
1638void
1639tileresize(Client *c, int x, int y, int w, int h) {
1640 resize(c, x, y, w, h, RESIZEHINTS);
1641 if((RESIZEHINTS) && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
1642 /* client doesn't accept size constraints */
1643 resize(c, x, y, w, h, False);
1644}
1645
1646void
1647tilev(void) {
1648 int y, h;
1649 unsigned int i, n = counttiled();
1650 Client *c;
1651
1652 if(n == 0)
1653 return;
1654 c = tilemaster(n);
1655 if(--n == 0)
1656 return;
1657
1658 y = ty;
1659 h = th / n;
1660 if(h < bh)
1661 h = th;
1662
1663 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1664 if(i + 1 == n) /* remainder */
1665 tileresize(c, tx, y, tw - 2 * c->bw, (ty + th) - y - 2 * c->bw);
1666 else
1667 tileresize(c, tx, y, tw - 2 * c->bw, h - 2 * c->bw);
1668 if(h != th)
1669 y = c->y + c->h + 2 * c->bw;
1670 }
1671}
1672
1673void
1674togglefloating(const char *arg) {
1675 if(!sel)
1676 return;
1677 sel->isfloating = !sel->isfloating;
1678 if(sel->isfloating)
1679 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1680 arrange();
1681}
1682
1683void
1684toggletag(const char *arg) {
1685 unsigned int i, j;
1686
1687 if(!sel)
1688 return;
1689 i = idxoftag(arg);
1690 sel->tags[i] = !sel->tags[i];
1691 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1692 if(j == LENGTH(tags))
1693 sel->tags[i] = True; /* at least one tag must be enabled */
1694 arrange();
1695}
1696
1697void
1698toggleview(const char *arg) {
1699 unsigned int i, j;
1700
1701 i = idxoftag(arg);
1702 tagset[seltags][i] = !tagset[seltags][i];
1703 for(j = 0; j < LENGTH(tags) && !tagset[seltags][j]; j++);
1704 if(j == LENGTH(tags))
1705 tagset[seltags][i] = True; /* at least one tag must be viewed */
1706 arrange();
1707}
1708
1709void
1710unban(Client *c) {
1711 if(!c->isbanned)
1712 return;
1713 XMoveWindow(dpy, c->win, c->x, c->y);
1714 c->isbanned = False;
1715}
1716
1717void
1718unmanage(Client *c) {
1719 XWindowChanges wc;
1720
1721 wc.border_width = c->oldbw;
1722 /* The server grab construct avoids race conditions. */
1723 XGrabServer(dpy);
1724 XSetErrorHandler(xerrordummy);
1725 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1726 detach(c);
1727 detachstack(c);
1728 if(sel == c)
1729 focus(NULL);
1730 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1731 setclientstate(c, WithdrawnState);
1732 free(c->tags);
1733 free(c);
1734 XSync(dpy, False);
1735 XSetErrorHandler(xerror);
1736 XUngrabServer(dpy);
1737 arrange();
1738}
1739
1740void
1741unmapnotify(XEvent *e) {
1742 Client *c;
1743 XUnmapEvent *ev = &e->xunmap;
1744
1745 if((c = getclient(ev->window)))
1746 unmanage(c);
1747}
1748
1749void
1750updatebarpos(void) {
1751
1752 if(dc.drawable != 0)
1753 XFreePixmap(dpy, dc.drawable);
1754 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1755 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1756}
1757
1758void
1759updatesizehints(Client *c) {
1760 long msize;
1761 XSizeHints size;
1762
1763 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1764 size.flags = PSize;
1765 c->flags = size.flags;
1766 if(c->flags & PBaseSize) {
1767 c->basew = size.base_width;
1768 c->baseh = size.base_height;
1769 }
1770 else if(c->flags & PMinSize) {
1771 c->basew = size.min_width;
1772 c->baseh = size.min_height;
1773 }
1774 else
1775 c->basew = c->baseh = 0;
1776 if(c->flags & PResizeInc) {
1777 c->incw = size.width_inc;
1778 c->inch = size.height_inc;
1779 }
1780 else
1781 c->incw = c->inch = 0;
1782 if(c->flags & PMaxSize) {
1783 c->maxw = size.max_width;
1784 c->maxh = size.max_height;
1785 }
1786 else
1787 c->maxw = c->maxh = 0;
1788 if(c->flags & PMinSize) {
1789 c->minw = size.min_width;
1790 c->minh = size.min_height;
1791 }
1792 else if(c->flags & PBaseSize) {
1793 c->minw = size.base_width;
1794 c->minh = size.base_height;
1795 }
1796 else
1797 c->minw = c->minh = 0;
1798 if(c->flags & PAspect) {
1799 c->minax = size.min_aspect.x;
1800 c->maxax = size.max_aspect.x;
1801 c->minay = size.min_aspect.y;
1802 c->maxay = size.max_aspect.y;
1803 }
1804 else
1805 c->minax = c->maxax = c->minay = c->maxay = 0;
1806 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1807 && c->maxw == c->minw && c->maxh == c->minh);
1808}
1809
1810void
1811updatetitle(Client *c) {
1812 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1813 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1814}
1815
1816void
1817updatewmhints(Client *c) {
1818 XWMHints *wmh;
1819
1820 if((wmh = XGetWMHints(dpy, c->win))) {
1821 if(c == sel)
1822 sel->isurgent = False;
1823 else
1824 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1825 XFree(wmh);
1826 }
1827}
1828
1829void
1830view(const char *arg) {
1831 seltags ^= 1;
1832 memset(tagset[seltags], (NULL == arg), TAGSZ);
1833 tagset[seltags][idxoftag(arg)] = True;
1834 arrange();
1835}
1836
1837void
1838viewprevtag(const char *arg) {
1839 seltags ^= 1; /* toggle sel tagset */
1840 arrange();
1841}
1842
1843/* There's no way to check accesses to destroyed windows, thus those cases are
1844 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1845 * default error handler, which may call exit. */
1846int
1847xerror(Display *dpy, XErrorEvent *ee) {
1848 if(ee->error_code == BadWindow
1849 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1850 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1851 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1852 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1853 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1854 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1855 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1856 return 0;
1857 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1858 ee->request_code, ee->error_code);
1859 return xerrorxlib(dpy, ee); /* may call exit */
1860}
1861
1862int
1863xerrordummy(Display *dpy, XErrorEvent *ee) {
1864 return 0;
1865}
1866
1867/* Startup Error handler to check if another window manager
1868 * is already running. */
1869int
1870xerrorstart(Display *dpy, XErrorEvent *ee) {
1871 otherwm = True;
1872 return -1;
1873}
1874
1875void
1876zoom(const char *arg) {
1877 Client *c = sel;
1878
1879 if(c == nexttiled(clients))
1880 if(!c || !(c = nexttiled(c->next)))
1881 return;
1882 if(!lt->isfloating && !sel->isfloating) {
1883 detach(c);
1884 attach(c);
1885 focus(c);
1886 }
1887 arrange();
1888}
1889
1890int
1891main(int argc, char *argv[]) {
1892 if(argc == 2 && !strcmp("-v", argv[1]))
1893 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1894 else if(argc != 1)
1895 eprint("usage: dwm [-v]\n");
1896
1897 setlocale(LC_CTYPE, "");
1898 if(!(dpy = XOpenDisplay(0)))
1899 eprint("dwm: cannot open display\n");
1900
1901 checkotherwm();
1902 setup();
1903 scan();
1904 run();
1905 cleanup();
1906
1907 XCloseDisplay(dpy);
1908 return 0;
1909}
1910