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[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains an array of Bools of the same size as the
20 * global tags array to indicate the tags of a client.
21 *
22 * Keys and tagging rules are organized as arrays and defined in config.h.
23 *
24 * To understand everything else, start reading main().
25 */
26 #include <errno.h>
27 #include <locale.h>
28 #include <stdarg.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33 #include <sys/select.h>
34 #include <sys/types.h>
35 #include <sys/wait.h>
36 #include <X11/cursorfont.h>
37 #include <X11/keysym.h>
38 #include <X11/Xatom.h>
39 #include <X11/Xlib.h>
40 #include <X11/Xproto.h>
41 #include <X11/Xutil.h>
42
43 /* macros */
44 #define MAX(a, b) ((a)>(b)?(a):(b))
45 #define MIN(a, b) ((a)<(b)?(a):(b))
46 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
47 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
48 #define LENGTH(x) (sizeof x / sizeof x[0])
49 #define MAXTAGLEN 16
50 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
51 #define DEFGEOM(GEONAME,BX,BY,BW,WX,WY,WW,WH,MX,MY,MW,MH,TX,TY,TW,TH,MOX,MOY,MOW,MOH) \
52 void 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 */
61 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
62 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
63 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
64 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
65
66 /* typedefs */
67 typedef struct Client Client;
68 struct 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
83 typedef 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
98 typedef struct {
99 const char *symbol;
100 void (*apply)(void);
101 } Geom;
102
103 typedef struct {
104 unsigned long mod;
105 KeySym keysym;
106 void (*func)(const char *arg);
107 const char *arg;
108 } Key;
109
110 typedef struct {
111 const char *symbol;
112 void (*arrange)(void);
113 Bool isfloating;
114 } Layout;
115
116 typedef 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 */
125 void applyrules(Client *c);
126 void arrange(void);
127 void attach(Client *c);
128 void attachstack(Client *c);
129 void ban(Client *c);
130 void buttonpress(XEvent *e);
131 void checkotherwm(void);
132 void cleanup(void);
133 void configure(Client *c);
134 void configurenotify(XEvent *e);
135 void configurerequest(XEvent *e);
136 unsigned int counttiled(void);
137 void destroynotify(XEvent *e);
138 void detach(Client *c);
139 void detachstack(Client *c);
140 void drawbar(void);
141 void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
142 void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
143 void *emallocz(unsigned int size);
144 void enternotify(XEvent *e);
145 void eprint(const char *errstr, ...);
146 void expose(XEvent *e);
147 void floating(void); /* default floating layout */
148 void focus(Client *c);
149 void focusin(XEvent *e);
150 void focusnext(const char *arg);
151 void focusprev(const char *arg);
152 Client *getclient(Window w);
153 unsigned long getcolor(const char *colstr);
154 long getstate(Window w);
155 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
156 void grabbuttons(Client *c, Bool focused);
157 void grabkeys(void);
158 unsigned int idxoftag(const char *t);
159 void initfont(const char *fontstr);
160 Bool isoccupied(unsigned int t);
161 Bool isprotodel(Client *c);
162 Bool isurgent(unsigned int t);
163 Bool isvisible(Client *c);
164 void keypress(XEvent *e);
165 void killclient(const char *arg);
166 void manage(Window w, XWindowAttributes *wa);
167 void mappingnotify(XEvent *e);
168 void maprequest(XEvent *e);
169 void monocle(void);
170 void movemouse(Client *c);
171 Client *nexttiled(Client *c);
172 void propertynotify(XEvent *e);
173 void quit(const char *arg);
174 void reapply(const char *arg);
175 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
176 void resizemouse(Client *c);
177 void restack(void);
178 void run(void);
179 void scan(void);
180 void setclientstate(Client *c, long state);
181 void setgeom(const char *arg);
182 void setlayout(const char *arg);
183 void setmfact(const char *arg);
184 void setup(void);
185 void spawn(const char *arg);
186 void tag(const char *arg);
187 unsigned int textnw(const char *text, unsigned int len);
188 unsigned int textw(const char *text);
189 void tileh(void);
190 void tilehstack(unsigned int n);
191 Client *tilemaster(unsigned int n);
192 void tileresize(Client *c, int x, int y, int w, int h);
193 void tilev(void);
194 void tilevstack(unsigned int n);
195 void togglefloating(const char *arg);
196 void toggletag(const char *arg);
197 void toggleview(const char *arg);
198 void unban(Client *c);
199 void unmanage(Client *c);
200 void unmapnotify(XEvent *e);
201 void updatebarpos(void);
202 void updatesizehints(Client *c);
203 void updatetitle(Client *c);
204 void updatewmhints(Client *c);
205 void view(const char *arg);
206 void viewprevtag(const char *arg); /* views previous selected tags */
207 int xerror(Display *dpy, XErrorEvent *ee);
208 int xerrordummy(Display *dpy, XErrorEvent *ee);
209 int xerrorstart(Display *dpy, XErrorEvent *ee);
210 void zoom(const char *arg);
211
212 /* variables */
213 char stext[256], buf[256];
214 int screen, sx, sy, sw, sh;
215 int (*xerrorxlib)(Display *, XErrorEvent *);
216 int bx, by, bw, bh, blw, bgw, mx, my, mw, mh, mox, moy, mow, moh, tx, ty, tw, th, wx, wy, ww, wh;
217 int viewtags_set = 0;
218 double mfact;
219 unsigned int numlockmask = 0;
220 void (*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 };
234 Atom wmatom[WMLast], netatom[NetLast];
235 Bool otherwm, readin;
236 Bool running = True;
237 Bool *seltags;
238 Bool *viewtags[2];
239 Client *clients = NULL;
240 Client *sel = NULL;
241 Client *stack = NULL;
242 Cursor cursor[CurLast];
243 Display *dpy;
244 DC dc = {0};
245 Window root, barwin;
246
247 /* configuration, allows nested code to access above variables */
248 #include "config.h"
249 #define TAGSZ (LENGTH(tags) * sizeof(Bool))
250 Layout *lt = layouts;
251 Geom *geom = geoms;
252
253 /* function implementations */
254
255 void
256 applyrules(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
284 void
285 arrange(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
299 void
300 attach(Client *c) {
301 if(clients)
302 clients->prev = c;
303 c->next = clients;
304 clients = c;
305 }
306
307 void
308 attachstack(Client *c) {
309 c->snext = stack;
310 stack = c;
311 }
312
313 void
314 ban(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
321 void
322 buttonpress(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
375 void
376 checkotherwm(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
391 void
392 cleanup(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
413 void
414 configure(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
431 void
432 configurenotify(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
442 void
443 configurerequest(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
486 unsigned int
487 counttiled(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
495 void
496 destroynotify(XEvent *e) {
497 Client *c;
498 XDestroyWindowEvent *ev = &e->xdestroywindow;
499
500 if((c = getclient(ev->window)))
501 unmanage(c);
502 }
503
504 void
505 detach(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
515 void
516 detachstack(Client *c) {
517 Client **tc;
518
519 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
520 *tc = c->snext;
521 }
522
523 void
524 drawbar(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
574 void
575 drawsquare(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
595 void
596 drawtext(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
601 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
602 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
603 if(!text)
604 return;
605 w = 0;
606 olen = strlen(text);
607 len = MIN(olen, sizeof buf - 1);
608 memcpy(buf, text, len);
609 buf[len] = 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 while(len && (w = textnw(buf, len)) > dc.w - h)
615 buf[--len] = 0;
616 if(len < olen) {
617 if(len > 1)
618 buf[len - 1] = '.';
619 if(len > 2)
620 buf[len - 2] = '.';
621 if(len > 3)
622 buf[len - 3] = '.';
623 }
624 if(w > dc.w)
625 return; /* too long */
626 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
627 if(dc.font.set)
628 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
629 else
630 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
631 }
632
633 void *
634 emallocz(unsigned int size) {
635 void *res = calloc(1, size);
636
637 if(!res)
638 eprint("fatal: could not malloc() %u bytes\n", size);
639 return res;
640 }
641
642 void
643 enternotify(XEvent *e) {
644 Client *c;
645 XCrossingEvent *ev = &e->xcrossing;
646
647 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
648 return;
649 if((c = getclient(ev->window)))
650 focus(c);
651 else
652 focus(NULL);
653 }
654
655 void
656 eprint(const char *errstr, ...) {
657 va_list ap;
658
659 va_start(ap, errstr);
660 vfprintf(stderr, errstr, ap);
661 va_end(ap);
662 exit(EXIT_FAILURE);
663 }
664
665 void
666 expose(XEvent *e) {
667 XExposeEvent *ev = &e->xexpose;
668
669 if(ev->count == 0 && (ev->window == barwin))
670 drawbar();
671 }
672
673 void
674 floating(void) { /* default floating layout */
675 Client *c;
676
677 for(c = clients; c; c = c->next)
678 if(isvisible(c))
679 resize(c, c->x, c->y, c->w, c->h, True);
680 }
681
682 void
683 focus(Client *c) {
684 if(!c || (c && !isvisible(c)))
685 for(c = stack; c && !isvisible(c); c = c->snext);
686 if(sel && sel != c) {
687 grabbuttons(sel, False);
688 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
689 }
690 if(c) {
691 detachstack(c);
692 attachstack(c);
693 grabbuttons(c, True);
694 }
695 sel = c;
696 if(c) {
697 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
698 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
699 }
700 else
701 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
702 drawbar();
703 }
704
705 void
706 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
707 XFocusChangeEvent *ev = &e->xfocus;
708
709 if(sel && ev->window != sel->win)
710 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
711 }
712
713 void
714 focusnext(const char *arg) {
715 Client *c;
716
717 if(!sel)
718 return;
719 for(c = sel->next; c && !isvisible(c); c = c->next);
720 if(!c)
721 for(c = clients; c && !isvisible(c); c = c->next);
722 if(c) {
723 focus(c);
724 restack();
725 }
726 }
727
728 void
729 focusprev(const char *arg) {
730 Client *c;
731
732 if(!sel)
733 return;
734 for(c = sel->prev; c && !isvisible(c); c = c->prev);
735 if(!c) {
736 for(c = clients; c && c->next; c = c->next);
737 for(; c && !isvisible(c); c = c->prev);
738 }
739 if(c) {
740 focus(c);
741 restack();
742 }
743 }
744
745 Client *
746 getclient(Window w) {
747 Client *c;
748
749 for(c = clients; c && c->win != w; c = c->next);
750 return c;
751 }
752
753 unsigned long
754 getcolor(const char *colstr) {
755 Colormap cmap = DefaultColormap(dpy, screen);
756 XColor color;
757
758 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
759 eprint("error, cannot allocate color '%s'\n", colstr);
760 return color.pixel;
761 }
762
763 long
764 getstate(Window w) {
765 int format, status;
766 long result = -1;
767 unsigned char *p = NULL;
768 unsigned long n, extra;
769 Atom real;
770
771 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
772 &real, &format, &n, &extra, (unsigned char **)&p);
773 if(status != Success)
774 return -1;
775 if(n != 0)
776 result = *p;
777 XFree(p);
778 return result;
779 }
780
781 Bool
782 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
783 char **list = NULL;
784 int n;
785 XTextProperty name;
786
787 if(!text || size == 0)
788 return False;
789 text[0] = '\0';
790 XGetTextProperty(dpy, w, &name, atom);
791 if(!name.nitems)
792 return False;
793 if(name.encoding == XA_STRING)
794 strncpy(text, (char *)name.value, size - 1);
795 else {
796 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
797 && n > 0 && *list) {
798 strncpy(text, *list, size - 1);
799 XFreeStringList(list);
800 }
801 }
802 text[size - 1] = '\0';
803 XFree(name.value);
804 return True;
805 }
806
807 void
808 grabbuttons(Client *c, Bool focused) {
809 int i, j;
810 unsigned int buttons[] = { Button1, Button2, Button3 };
811 unsigned int modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask,
812 MODKEY|numlockmask|LockMask} ;
813
814 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
815 if(focused)
816 for(i = 0; i < LENGTH(buttons); i++)
817 for(j = 0; j < LENGTH(modifiers); j++)
818 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
819 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
820 else
821 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
822 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
823 }
824
825 void
826 grabkeys(void) {
827 unsigned int i, j;
828 KeyCode code;
829 XModifierKeymap *modmap;
830
831 /* init modifier map */
832 modmap = XGetModifierMapping(dpy);
833 for(i = 0; i < 8; i++)
834 for(j = 0; j < modmap->max_keypermod; j++) {
835 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
836 numlockmask = (1 << i);
837 }
838 XFreeModifiermap(modmap);
839
840 XUngrabKey(dpy, AnyKey, AnyModifier, root);
841 for(i = 0; i < LENGTH(keys); i++) {
842 code = XKeysymToKeycode(dpy, keys[i].keysym);
843 XGrabKey(dpy, code, keys[i].mod, root, True,
844 GrabModeAsync, GrabModeAsync);
845 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
846 GrabModeAsync, GrabModeAsync);
847 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
848 GrabModeAsync, GrabModeAsync);
849 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
850 GrabModeAsync, GrabModeAsync);
851 }
852 }
853
854 unsigned int
855 idxoftag(const char *t) {
856 unsigned int i;
857
858 for(i = 0; (i < LENGTH(tags)) && t && strcmp(tags[i], t); i++);
859 return (i < LENGTH(tags)) ? i : 0;
860 }
861
862 void
863 initfont(const char *fontstr) {
864 char *def, **missing;
865 int i, n;
866
867 missing = NULL;
868 if(dc.font.set)
869 XFreeFontSet(dpy, dc.font.set);
870 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
871 if(missing) {
872 while(n--)
873 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
874 XFreeStringList(missing);
875 }
876 if(dc.font.set) {
877 XFontSetExtents *font_extents;
878 XFontStruct **xfonts;
879 char **font_names;
880 dc.font.ascent = dc.font.descent = 0;
881 font_extents = XExtentsOfFontSet(dc.font.set);
882 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
883 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
884 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
885 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
886 xfonts++;
887 }
888 }
889 else {
890 if(dc.font.xfont)
891 XFreeFont(dpy, dc.font.xfont);
892 dc.font.xfont = NULL;
893 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
894 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
895 eprint("error, cannot load font: '%s'\n", fontstr);
896 dc.font.ascent = dc.font.xfont->ascent;
897 dc.font.descent = dc.font.xfont->descent;
898 }
899 dc.font.height = dc.font.ascent + dc.font.descent;
900 }
901
902 Bool
903 isoccupied(unsigned int t) {
904 Client *c;
905
906 for(c = clients; c; c = c->next)
907 if(c->tags[t])
908 return True;
909 return False;
910 }
911
912 Bool
913 isprotodel(Client *c) {
914 int i, n;
915 Atom *protocols;
916 Bool ret = False;
917
918 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
919 for(i = 0; !ret && i < n; i++)
920 if(protocols[i] == wmatom[WMDelete])
921 ret = True;
922 XFree(protocols);
923 }
924 return ret;
925 }
926
927 Bool
928 isurgent(unsigned int t) {
929 Client *c;
930
931 for(c = clients; c; c = c->next)
932 if(c->isurgent && c->tags[t])
933 return True;
934 return False;
935 }
936
937 Bool
938 isvisible(Client *c) {
939 unsigned int i;
940
941 for(i = 0; i < LENGTH(tags); i++)
942 if(c->tags[i] && seltags[i])
943 return True;
944 return False;
945 }
946
947 void
948 keypress(XEvent *e) {
949 unsigned int i;
950 KeySym keysym;
951 XKeyEvent *ev;
952
953 ev = &e->xkey;
954 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
955 for(i = 0; i < LENGTH(keys); i++)
956 if(keysym == keys[i].keysym
957 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
958 {
959 if(keys[i].func)
960 keys[i].func(keys[i].arg);
961 }
962 }
963
964 void
965 killclient(const char *arg) {
966 XEvent ev;
967
968 if(!sel)
969 return;
970 if(isprotodel(sel)) {
971 ev.type = ClientMessage;
972 ev.xclient.window = sel->win;
973 ev.xclient.message_type = wmatom[WMProtocols];
974 ev.xclient.format = 32;
975 ev.xclient.data.l[0] = wmatom[WMDelete];
976 ev.xclient.data.l[1] = CurrentTime;
977 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
978 }
979 else
980 XKillClient(dpy, sel->win);
981 }
982
983 void
984 manage(Window w, XWindowAttributes *wa) {
985 Client *c, *t = NULL;
986 Status rettrans;
987 Window trans;
988 XWindowChanges wc;
989
990 c = emallocz(sizeof(Client));
991 c->tags = emallocz(TAGSZ);
992 c->win = w;
993
994 /* geometry */
995 c->x = wa->x;
996 c->y = wa->y;
997 c->w = wa->width;
998 c->h = wa->height;
999 c->oldbw = wa->border_width;
1000 if(c->w == sw && c->h == sh) {
1001 c->x = sx;
1002 c->y = sy;
1003 c->bw = wa->border_width;
1004 }
1005 else {
1006 if(c->x + c->w + 2 * c->bw > wx + ww)
1007 c->x = wx + ww - c->w - 2 * c->bw;
1008 if(c->y + c->h + 2 * c->bw > wy + wh)
1009 c->y = wy + wh - c->h - 2 * c->bw;
1010 c->x = MAX(c->x, wx);
1011 c->y = MAX(c->y, wy);
1012 c->bw = BORDERPX;
1013 }
1014
1015 wc.border_width = c->bw;
1016 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1017 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1018 configure(c); /* propagates border_width, if size doesn't change */
1019 updatesizehints(c);
1020 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1021 grabbuttons(c, False);
1022 updatetitle(c);
1023 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1024 for(t = clients; t && t->win != trans; t = t->next);
1025 if(t)
1026 memcpy(c->tags, t->tags, TAGSZ);
1027 else
1028 applyrules(c);
1029 if(!c->isfloating)
1030 c->isfloating = (rettrans == Success) || c->isfixed;
1031 attach(c);
1032 attachstack(c);
1033 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1034 ban(c);
1035 XMapWindow(dpy, c->win);
1036 setclientstate(c, NormalState);
1037 arrange();
1038 }
1039
1040 void
1041 mappingnotify(XEvent *e) {
1042 XMappingEvent *ev = &e->xmapping;
1043
1044 XRefreshKeyboardMapping(ev);
1045 if(ev->request == MappingKeyboard)
1046 grabkeys();
1047 }
1048
1049 void
1050 maprequest(XEvent *e) {
1051 static XWindowAttributes wa;
1052 XMapRequestEvent *ev = &e->xmaprequest;
1053
1054 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1055 return;
1056 if(wa.override_redirect)
1057 return;
1058 if(!getclient(ev->window))
1059 manage(ev->window, &wa);
1060 }
1061
1062 void
1063 monocle(void) {
1064 Client *c;
1065
1066 for(c = clients; c; c = c->next)
1067 if((lt->isfloating || !c->isfloating) && isvisible(c))
1068 resize(c, mox, moy, mow - 2 * c->bw, moh - 2 * c->bw, RESIZEHINTS);
1069 }
1070
1071 void
1072 movemouse(Client *c) {
1073 int x1, y1, ocx, ocy, di, nx, ny;
1074 unsigned int dui;
1075 Window dummy;
1076 XEvent ev;
1077
1078 ocx = nx = c->x;
1079 ocy = ny = c->y;
1080 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1081 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1082 return;
1083 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1084 for(;;) {
1085 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1086 switch (ev.type) {
1087 case ButtonRelease:
1088 XUngrabPointer(dpy, CurrentTime);
1089 return;
1090 case ConfigureRequest:
1091 case Expose:
1092 case MapRequest:
1093 handler[ev.type](&ev);
1094 break;
1095 case MotionNotify:
1096 XSync(dpy, False);
1097 nx = ocx + (ev.xmotion.x - x1);
1098 ny = ocy + (ev.xmotion.y - y1);
1099 if(abs(wx - nx) < SNAP)
1100 nx = wx;
1101 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < SNAP)
1102 nx = wx + ww - c->w - 2 * c->bw;
1103 if(abs(wy - ny) < SNAP)
1104 ny = wy;
1105 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < SNAP)
1106 ny = wy + wh - c->h - 2 * c->bw;
1107 if(!c->isfloating && !lt->isfloating && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1108 togglefloating(NULL);
1109 if((lt->isfloating) || c->isfloating)
1110 resize(c, nx, ny, c->w, c->h, False);
1111 break;
1112 }
1113 }
1114 }
1115
1116 Client *
1117 nexttiled(Client *c) {
1118 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1119 return c;
1120 }
1121
1122 void
1123 propertynotify(XEvent *e) {
1124 Client *c;
1125 Window trans;
1126 XPropertyEvent *ev = &e->xproperty;
1127
1128 if(ev->state == PropertyDelete)
1129 return; /* ignore */
1130 if((c = getclient(ev->window))) {
1131 switch (ev->atom) {
1132 default: break;
1133 case XA_WM_TRANSIENT_FOR:
1134 XGetTransientForHint(dpy, c->win, &trans);
1135 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1136 arrange();
1137 break;
1138 case XA_WM_NORMAL_HINTS:
1139 updatesizehints(c);
1140 break;
1141 case XA_WM_HINTS:
1142 updatewmhints(c);
1143 drawbar();
1144 break;
1145 }
1146 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1147 updatetitle(c);
1148 if(c == sel)
1149 drawbar();
1150 }
1151 }
1152 }
1153
1154 void
1155 quit(const char *arg) {
1156 readin = running = False;
1157 }
1158
1159 void
1160 reapply(const char *arg) {
1161 Client *c;
1162
1163 for(c = clients; c; c = c->next) {
1164 memset(c->tags, 0, TAGSZ);
1165 applyrules(c);
1166 }
1167 arrange();
1168 }
1169
1170 void
1171 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1172 XWindowChanges wc;
1173
1174 if(sizehints) {
1175 /* set minimum possible */
1176 w = MAX(1, w);
1177 h = MAX(1, h);
1178
1179 /* temporarily remove base dimensions */
1180 w -= c->basew;
1181 h -= c->baseh;
1182
1183 /* adjust for aspect limits */
1184 if(c->minax != c->maxax && c->minay != c->maxay
1185 && c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0)
1186 {
1187 if(w * c->maxay > h * c->maxax)
1188 w = h * c->maxax / c->maxay;
1189 else if(w * c->minay < h * c->minax)
1190 h = w * c->minay / c->minax;
1191 }
1192
1193 /* adjust for increment value */
1194 if(c->incw)
1195 w -= w % c->incw;
1196 if(c->inch)
1197 h -= h % c->inch;
1198
1199 /* restore base dimensions */
1200 w += c->basew;
1201 h += c->baseh;
1202
1203 w = MAX(w, c->minw);
1204 h = MAX(h, c->minh);
1205
1206 if (c->maxw)
1207 w = MIN(w, c->maxw);
1208
1209 if (c->maxh)
1210 h = MIN(h, c->maxh);
1211 }
1212 if(w <= 0 || h <= 0)
1213 return;
1214 if(x > sx + sw)
1215 x = sw - w - 2 * c->bw;
1216 if(y > sy + sh)
1217 y = sh - h - 2 * c->bw;
1218 if(x + w + 2 * c->bw < sx)
1219 x = sx;
1220 if(y + h + 2 * c->bw < sy)
1221 y = sy;
1222 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1223 c->x = wc.x = x;
1224 c->y = wc.y = y;
1225 c->w = wc.width = w;
1226 c->h = wc.height = h;
1227 wc.border_width = c->bw;
1228 XConfigureWindow(dpy, c->win,
1229 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1230 configure(c);
1231 XSync(dpy, False);
1232 }
1233 }
1234
1235 void
1236 resizemouse(Client *c) {
1237 int ocx, ocy;
1238 int nw, nh;
1239 XEvent ev;
1240
1241 ocx = c->x;
1242 ocy = c->y;
1243 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1244 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1245 return;
1246 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1247 for(;;) {
1248 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1249 switch(ev.type) {
1250 case ButtonRelease:
1251 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1252 c->w + c->bw - 1, c->h + c->bw - 1);
1253 XUngrabPointer(dpy, CurrentTime);
1254 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1255 return;
1256 case ConfigureRequest:
1257 case Expose:
1258 case MapRequest:
1259 handler[ev.type](&ev);
1260 break;
1261 case MotionNotify:
1262 XSync(dpy, False);
1263 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1264 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1265 if(!c->isfloating && !lt->isfloating && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1266 togglefloating(NULL);
1267 if((lt->isfloating) || c->isfloating)
1268 resize(c, c->x, c->y, nw, nh, True);
1269 break;
1270 }
1271 }
1272 }
1273
1274 void
1275 restack(void) {
1276 Client *c;
1277 XEvent ev;
1278 XWindowChanges wc;
1279
1280 drawbar();
1281 if(!sel)
1282 return;
1283 if(sel->isfloating || lt->isfloating)
1284 XRaiseWindow(dpy, sel->win);
1285 if(!lt->isfloating) {
1286 wc.stack_mode = Below;
1287 wc.sibling = barwin;
1288 if(!sel->isfloating) {
1289 XConfigureWindow(dpy, sel->win, CWSibling|CWStackMode, &wc);
1290 wc.sibling = sel->win;
1291 }
1292 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1293 if(c == sel)
1294 continue;
1295 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1296 wc.sibling = c->win;
1297 }
1298 }
1299 XSync(dpy, False);
1300 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1301 }
1302
1303 void
1304 run(void) {
1305 char *p;
1306 char sbuf[sizeof stext];
1307 fd_set rd;
1308 int r, xfd;
1309 unsigned int len, offset;
1310 XEvent ev;
1311
1312 /* main event loop, also reads status text from stdin */
1313 XSync(dpy, False);
1314 xfd = ConnectionNumber(dpy);
1315 readin = True;
1316 offset = 0;
1317 len = sizeof stext - 1;
1318 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1319 while(running) {
1320 FD_ZERO(&rd);
1321 if(readin)
1322 FD_SET(STDIN_FILENO, &rd);
1323 FD_SET(xfd, &rd);
1324 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1325 if(errno == EINTR)
1326 continue;
1327 eprint("select failed\n");
1328 }
1329 if(FD_ISSET(STDIN_FILENO, &rd)) {
1330 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1331 case -1:
1332 strncpy(stext, strerror(errno), len);
1333 readin = False;
1334 break;
1335 case 0:
1336 strncpy(stext, "EOF", 4);
1337 readin = False;
1338 break;
1339 default:
1340 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1341 if(*p == '\n' || *p == '\0') {
1342 *p = '\0';
1343 strncpy(stext, sbuf, len);
1344 p += r - 1; /* p is sbuf + offset + r - 1 */
1345 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1346 offset = r;
1347 if(r)
1348 memmove(sbuf, p - r + 1, r);
1349 break;
1350 }
1351 break;
1352 }
1353 drawbar();
1354 }
1355 while(XPending(dpy)) {
1356 XNextEvent(dpy, &ev);
1357 if(handler[ev.type])
1358 (handler[ev.type])(&ev); /* call handler */
1359 }
1360 }
1361 }
1362
1363 void
1364 scan(void) {
1365 unsigned int i, num;
1366 Window *wins, d1, d2;
1367 XWindowAttributes wa;
1368
1369 wins = NULL;
1370 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1371 for(i = 0; i < num; i++) {
1372 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1373 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1374 continue;
1375 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1376 manage(wins[i], &wa);
1377 }
1378 for(i = 0; i < num; i++) { /* now the transients */
1379 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1380 continue;
1381 if(XGetTransientForHint(dpy, wins[i], &d1)
1382 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1383 manage(wins[i], &wa);
1384 }
1385 }
1386 if(wins)
1387 XFree(wins);
1388 }
1389
1390 void
1391 setclientstate(Client *c, long state) {
1392 long data[] = {state, None};
1393
1394 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1395 PropModeReplace, (unsigned char *)data, 2);
1396 }
1397
1398 void
1399 setgeom(const char *arg) {
1400 unsigned int i;
1401
1402 if(!arg) {
1403 if(++geom == &geoms[LENGTH(geoms)])
1404 geom = &geoms[0];
1405 }
1406 else {
1407 for(i = 0; i < LENGTH(geoms); i++)
1408 if(!strcmp(geoms[i].symbol, arg))
1409 break;
1410 if(i == LENGTH(geoms))
1411 return;
1412 geom = &geoms[i];
1413 }
1414 geom->apply();
1415 updatebarpos();
1416 arrange();
1417 }
1418
1419 void
1420 setlayout(const char *arg) {
1421 unsigned int i;
1422
1423 if(!arg) {
1424 if(++lt == &layouts[LENGTH(layouts)])
1425 lt = &layouts[0];
1426 }
1427 else {
1428 for(i = 0; i < LENGTH(layouts); i++)
1429 if(!strcmp(arg, layouts[i].symbol))
1430 break;
1431 if(i == LENGTH(layouts))
1432 return;
1433 lt = &layouts[i];
1434 }
1435 if(sel)
1436 arrange();
1437 else
1438 drawbar();
1439 }
1440
1441 void
1442 setmfact(const char *arg) {
1443 double d;
1444
1445 if(lt->isfloating)
1446 return;
1447 if(!arg)
1448 mfact = MFACT;
1449 else {
1450 d = strtod(arg, NULL);
1451 if(arg[0] == '-' || arg[0] == '+')
1452 d += mfact;
1453 if(d < 0.1 || d > 0.9)
1454 return;
1455 mfact = d;
1456 }
1457 setgeom(geom->symbol);
1458 }
1459
1460 void
1461 setup(void) {
1462 unsigned int i, w;
1463 XSetWindowAttributes wa;
1464
1465 /* init screen */
1466 screen = DefaultScreen(dpy);
1467 root = RootWindow(dpy, screen);
1468 initfont(FONT);
1469
1470 /* apply default geometry */
1471 sx = 0;
1472 sy = 0;
1473 sw = DisplayWidth(dpy, screen);
1474 sh = DisplayHeight(dpy, screen);
1475 bh = dc.font.height + 2;
1476 mfact = MFACT;
1477 geom->apply();
1478
1479 /* init atoms */
1480 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1481 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1482 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1483 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1484 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1485 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1486
1487 /* init cursors */
1488 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1489 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1490 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1491
1492 /* init appearance */
1493 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1494 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1495 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1496 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1497 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1498 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1499 initfont(FONT);
1500 dc.h = bh;
1501 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1502 dc.gc = XCreateGC(dpy, root, 0, 0);
1503 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1504 if(!dc.font.set)
1505 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1506
1507 /* init tags */
1508 viewtags[0] = emallocz(TAGSZ);
1509 viewtags[1] = emallocz(TAGSZ);
1510 viewtags[0][0] = viewtags[1][0] = True;
1511 seltags = viewtags[0];
1512
1513 /* init bar */
1514 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1515 w = textw(layouts[i].symbol);
1516 blw = MAX(blw, w);
1517 }
1518 for(bgw = i = 0; LENGTH(geoms) > 1 && i < LENGTH(geoms); i++) {
1519 w = textw(geoms[i].symbol);
1520 bgw = MAX(bgw, w);
1521 }
1522
1523 wa.override_redirect = 1;
1524 wa.background_pixmap = ParentRelative;
1525 wa.event_mask = ButtonPressMask|ExposureMask;
1526
1527 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1528 CopyFromParent, DefaultVisual(dpy, screen),
1529 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1530 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1531 XMapRaised(dpy, barwin);
1532 strcpy(stext, "dwm-"VERSION);
1533 drawbar();
1534
1535 /* EWMH support per view */
1536 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1537 PropModeReplace, (unsigned char *) netatom, NetLast);
1538
1539 /* select for events */
1540 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1541 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1542 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1543 XSelectInput(dpy, root, wa.event_mask);
1544
1545
1546 /* grab keys */
1547 grabkeys();
1548 }
1549
1550 void
1551 spawn(const char *arg) {
1552 static char *shell = NULL;
1553
1554 if(!shell && !(shell = getenv("SHELL")))
1555 shell = "/bin/sh";
1556 if(!arg)
1557 return;
1558 /* The double-fork construct avoids zombie processes and keeps the code
1559 * clean from stupid signal handlers. */
1560 if(fork() == 0) {
1561 if(fork() == 0) {
1562 if(dpy)
1563 close(ConnectionNumber(dpy));
1564 setsid();
1565 execl(shell, shell, "-c", arg, (char *)NULL);
1566 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1567 perror(" failed");
1568 }
1569 exit(0);
1570 }
1571 wait(0);
1572 }
1573
1574 void
1575 tag(const char *arg) {
1576 unsigned int i;
1577
1578 if(!sel)
1579 return;
1580 for(i = 0; i < LENGTH(tags); i++)
1581 sel->tags[i] = (NULL == arg);
1582 sel->tags[idxoftag(arg)] = True;
1583 arrange();
1584 }
1585
1586 unsigned int
1587 textnw(const char *text, unsigned int len) {
1588 XRectangle r;
1589
1590 if(dc.font.set) {
1591 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1592 return r.width;
1593 }
1594 return XTextWidth(dc.font.xfont, text, len);
1595 }
1596
1597 unsigned int
1598 textw(const char *text) {
1599 return textnw(text, strlen(text)) + dc.font.height;
1600 }
1601
1602 void
1603 tileh(void) {
1604 int x, w;
1605 unsigned int i, n = counttiled();
1606 Client *c;
1607
1608 if(n == 0)
1609 return;
1610 c = tilemaster(n);
1611 if(--n == 0)
1612 return;
1613
1614 x = tx;
1615 w = tw / n;
1616 if(w < bh)
1617 w = tw;
1618
1619 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1620 if(i + 1 == n) /* remainder */
1621 tileresize(c, x, ty, (tx + tw) - x - 2 * c->bw, th - 2 * c->bw);
1622 else
1623 tileresize(c, x, ty, w - 2 * c->bw, th - 2 * c->bw);
1624 if(w != tw)
1625 x = c->x + c->w + 2 * c->bw;
1626 }
1627 }
1628
1629 Client *
1630 tilemaster(unsigned int n) {
1631 Client *c = nexttiled(clients);
1632
1633 if(n == 1)
1634 tileresize(c, mox, moy, mow - 2 * c->bw, moh - 2 * c->bw);
1635 else
1636 tileresize(c, mx, my, mw - 2 * c->bw, mh - 2 * c->bw);
1637 return c;
1638 }
1639
1640 void
1641 tileresize(Client *c, int x, int y, int w, int h) {
1642 resize(c, x, y, w, h, RESIZEHINTS);
1643 if((RESIZEHINTS) && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
1644 /* client doesn't accept size constraints */
1645 resize(c, x, y, w, h, False);
1646 }
1647
1648 void
1649 tilev(void) {
1650 int y, h;
1651 unsigned int i, n = counttiled();
1652 Client *c;
1653
1654 if(n == 0)
1655 return;
1656 c = tilemaster(n);
1657 if(--n == 0)
1658 return;
1659
1660 y = ty;
1661 h = th / n;
1662 if(h < bh)
1663 h = th;
1664
1665 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1666 if(i + 1 == n) /* remainder */
1667 tileresize(c, tx, y, tw - 2 * c->bw, (ty + th) - y - 2 * c->bw);
1668 else
1669 tileresize(c, tx, y, tw - 2 * c->bw, h - 2 * c->bw);
1670 if(h != th)
1671 y = c->y + c->h + 2 * c->bw;
1672 }
1673 }
1674
1675 void
1676 togglefloating(const char *arg) {
1677 if(!sel)
1678 return;
1679 sel->isfloating = !sel->isfloating;
1680 if(sel->isfloating)
1681 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1682 arrange();
1683 }
1684
1685 void
1686 toggletag(const char *arg) {
1687 unsigned int i, j;
1688
1689 if(!sel)
1690 return;
1691 i = idxoftag(arg);
1692 sel->tags[i] = !sel->tags[i];
1693 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1694 if(j == LENGTH(tags))
1695 sel->tags[i] = True; /* at least one tag must be enabled */
1696 arrange();
1697 }
1698
1699 void
1700 toggleview(const char *arg) {
1701 unsigned int i, j;
1702
1703 i = idxoftag(arg);
1704 seltags[i] = !seltags[i];
1705 for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1706 if(j == LENGTH(tags))
1707 seltags[i] = True; /* at least one tag must be viewed */
1708 arrange();
1709 }
1710
1711 void
1712 unban(Client *c) {
1713 if(!c->isbanned)
1714 return;
1715 XMoveWindow(dpy, c->win, c->x, c->y);
1716 c->isbanned = False;
1717 }
1718
1719 void
1720 unmanage(Client *c) {
1721 XWindowChanges wc;
1722
1723 wc.border_width = c->oldbw;
1724 /* The server grab construct avoids race conditions. */
1725 XGrabServer(dpy);
1726 XSetErrorHandler(xerrordummy);
1727 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1728 detach(c);
1729 detachstack(c);
1730 if(sel == c)
1731 focus(NULL);
1732 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1733 setclientstate(c, WithdrawnState);
1734 free(c->tags);
1735 free(c);
1736 XSync(dpy, False);
1737 XSetErrorHandler(xerror);
1738 XUngrabServer(dpy);
1739 arrange();
1740 }
1741
1742 void
1743 unmapnotify(XEvent *e) {
1744 Client *c;
1745 XUnmapEvent *ev = &e->xunmap;
1746
1747 if((c = getclient(ev->window)))
1748 unmanage(c);
1749 }
1750
1751 void
1752 updatebarpos(void) {
1753
1754 if(dc.drawable != 0)
1755 XFreePixmap(dpy, dc.drawable);
1756 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1757 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1758 }
1759
1760 void
1761 updatesizehints(Client *c) {
1762 long msize;
1763 XSizeHints size;
1764
1765 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1766 size.flags = PSize;
1767 c->flags = size.flags;
1768 if(c->flags & PBaseSize) {
1769 c->basew = size.base_width;
1770 c->baseh = size.base_height;
1771 }
1772 else if(c->flags & PMinSize) {
1773 c->basew = size.min_width;
1774 c->baseh = size.min_height;
1775 }
1776 else
1777 c->basew = c->baseh = 0;
1778 if(c->flags & PResizeInc) {
1779 c->incw = size.width_inc;
1780 c->inch = size.height_inc;
1781 }
1782 else
1783 c->incw = c->inch = 0;
1784 if(c->flags & PMaxSize) {
1785 c->maxw = size.max_width;
1786 c->maxh = size.max_height;
1787 }
1788 else
1789 c->maxw = c->maxh = 0;
1790 if(c->flags & PMinSize) {
1791 c->minw = size.min_width;
1792 c->minh = size.min_height;
1793 }
1794 else if(c->flags & PBaseSize) {
1795 c->minw = size.base_width;
1796 c->minh = size.base_height;
1797 }
1798 else
1799 c->minw = c->minh = 0;
1800 if(c->flags & PAspect) {
1801 c->minax = size.min_aspect.x;
1802 c->maxax = size.max_aspect.x;
1803 c->minay = size.min_aspect.y;
1804 c->maxay = size.max_aspect.y;
1805 }
1806 else
1807 c->minax = c->maxax = c->minay = c->maxay = 0;
1808 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1809 && c->maxw == c->minw && c->maxh == c->minh);
1810 }
1811
1812 void
1813 updatetitle(Client *c) {
1814 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1815 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1816 }
1817
1818 void
1819 updatewmhints(Client *c) {
1820 XWMHints *wmh;
1821
1822 if((wmh = XGetWMHints(dpy, c->win))) {
1823 if(c == sel)
1824 sel->isurgent = False;
1825 else
1826 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1827 XFree(wmh);
1828 }
1829 }
1830
1831 void
1832 view(const char *arg) {
1833 Bool tmp[LENGTH(tags)];
1834 unsigned int i;
1835
1836 for(i = 0; i < LENGTH(tags); i++)
1837 tmp[i] = (NULL == arg);
1838 tmp[idxoftag(arg)] = True;
1839
1840 if(memcmp(seltags, tmp, TAGSZ) != 0) {
1841 seltags = viewtags[viewtags_set ^= 1]; /* toggle tagset */
1842 memcpy(seltags, tmp, TAGSZ);
1843 arrange();
1844 }
1845 }
1846
1847 void
1848 viewprevtag(const char *arg) {
1849 seltags = viewtags[viewtags_set ^= 1]; /* toggle tagset */
1850 arrange();
1851 }
1852
1853 /* There's no way to check accesses to destroyed windows, thus those cases are
1854 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1855 * default error handler, which may call exit. */
1856 int
1857 xerror(Display *dpy, XErrorEvent *ee) {
1858 if(ee->error_code == BadWindow
1859 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1860 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1861 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1862 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1863 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1864 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1865 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1866 return 0;
1867 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1868 ee->request_code, ee->error_code);
1869 return xerrorxlib(dpy, ee); /* may call exit */
1870 }
1871
1872 int
1873 xerrordummy(Display *dpy, XErrorEvent *ee) {
1874 return 0;
1875 }
1876
1877 /* Startup Error handler to check if another window manager
1878 * is already running. */
1879 int
1880 xerrorstart(Display *dpy, XErrorEvent *ee) {
1881 otherwm = True;
1882 return -1;
1883 }
1884
1885 void
1886 zoom(const char *arg) {
1887 Client *c = sel;
1888
1889 if(!sel || lt->isfloating || sel->isfloating)
1890 return;
1891 if(c == nexttiled(clients))
1892 if(!(c = nexttiled(c->next)))
1893 return;
1894 detach(c);
1895 attach(c);
1896 focus(c);
1897 arrange();
1898 }
1899
1900 int
1901 main(int argc, char *argv[]) {
1902 if(argc == 2 && !strcmp("-v", argv[1]))
1903 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1904 else if(argc != 1)
1905 eprint("usage: dwm [-v]\n");
1906
1907 setlocale(LC_CTYPE, "");
1908 if(!(dpy = XOpenDisplay(0)))
1909 eprint("dwm: cannot open display\n");
1910
1911 checkotherwm();
1912 setup();
1913 scan();
1914 run();
1915 cleanup();
1916
1917 XCloseDisplay(dpy);
1918 return 0;
1919 }
1920