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