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applied Ph's patch regarding geom and lt initialization
[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains an array of Bools of the same size as the
20 * global tags array to indicate the tags of a client.
21 *
22 * Keys and tagging rules are organized as arrays and defined in config.h.
23 *
24 * To understand everything else, start reading main().
25 */
26 #include <errno.h>
27 #include <locale.h>
28 #include <stdarg.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33 #include <sys/select.h>
34 #include <sys/types.h>
35 #include <sys/wait.h>
36 #include <X11/cursorfont.h>
37 #include <X11/keysym.h>
38 #include <X11/Xatom.h>
39 #include <X11/Xlib.h>
40 #include <X11/Xproto.h>
41 #include <X11/Xutil.h>
42
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define LENGTH(x) (sizeof x / sizeof x[0])
47 #define MAXTAGLEN 16
48 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
49 #define DEFGEOM(GEONAME,BX,BY,BW,WX,WY,WW,WH,MX,MY,MW,MH,TX,TY,TW,TH,MOX,MOY,MOW,MOH) \
50 void GEONAME(void) { \
51 bx = (BX); by = (BY); bw = (BW); \
52 wx = (WX); wy = (WY); ww = (WW); wh = (WH); \
53 mx = (MX); my = (MY); mw = (MW); mh = (MH); \
54 tx = (TX); ty = (TY); tw = (TW); th = (TH); \
55 mox = (MOX); moy = (MOY); mow = (MOW); moh = (MOH); \
56 }
57
58 /* enums */
59 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
60 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
61 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
62 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
63
64 /* typedefs */
65 typedef struct Client Client;
66 struct Client {
67 char name[256];
68 int x, y, w, h;
69 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
70 int minax, maxax, minay, maxay;
71 long flags;
72 unsigned int bw, oldbw;
73 Bool isbanned, isfixed, isfloating, isurgent;
74 Bool *tags;
75 Client *next;
76 Client *prev;
77 Client *snext;
78 Window win;
79 };
80
81 typedef struct {
82 int x, y, w, h;
83 unsigned long norm[ColLast];
84 unsigned long sel[ColLast];
85 Drawable drawable;
86 GC gc;
87 struct {
88 int ascent;
89 int descent;
90 int height;
91 XFontSet set;
92 XFontStruct *xfont;
93 } font;
94 } DC; /* draw context */
95
96 typedef struct {
97 const char *symbol;
98 void (*apply)(void);
99 } Geom;
100
101 typedef struct {
102 unsigned long mod;
103 KeySym keysym;
104 void (*func)(const char *arg);
105 const char *arg;
106 } Key;
107
108 typedef struct {
109 const char *symbol;
110 void (*arrange)(void);
111 Bool isfloating;
112 } Layout;
113
114 typedef struct {
115 const char *class;
116 const char *instance;
117 const char *title;
118 const char *tag;
119 Bool isfloating;
120 } Rule;
121
122 /* function declarations */
123 void applyrules(Client *c);
124 void arrange(void);
125 void attach(Client *c);
126 void attachstack(Client *c);
127 void ban(Client *c);
128 void buttonpress(XEvent *e);
129 void checkotherwm(void);
130 void cleanup(void);
131 void configure(Client *c);
132 void configurenotify(XEvent *e);
133 void configurerequest(XEvent *e);
134 unsigned int counttiled(void);
135 void destroynotify(XEvent *e);
136 void detach(Client *c);
137 void detachstack(Client *c);
138 void drawbar(void);
139 void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
140 void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
141 void *emallocz(unsigned int size);
142 void enternotify(XEvent *e);
143 void eprint(const char *errstr, ...);
144 void expose(XEvent *e);
145 void floating(void); /* default floating layout */
146 void focus(Client *c);
147 void focusin(XEvent *e);
148 void focusnext(const char *arg);
149 void focusprev(const char *arg);
150 Client *getclient(Window w);
151 unsigned long getcolor(const char *colstr);
152 long getstate(Window w);
153 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
154 void grabbuttons(Client *c, Bool focused);
155 void grabkeys(void);
156 unsigned int idxoftag(const char *t);
157 void initfont(const char *fontstr);
158 Bool isoccupied(unsigned int t);
159 Bool isprotodel(Client *c);
160 Bool isurgent(unsigned int t);
161 Bool isvisible(Client *c);
162 void keypress(XEvent *e);
163 void killclient(const char *arg);
164 void manage(Window w, XWindowAttributes *wa);
165 void mappingnotify(XEvent *e);
166 void maprequest(XEvent *e);
167 void monocle(void);
168 void movemouse(Client *c);
169 Client *nexttiled(Client *c);
170 void propertynotify(XEvent *e);
171 void quit(const char *arg);
172 void reapply(const char *arg);
173 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
174 void resizemouse(Client *c);
175 void restack(void);
176 void run(void);
177 void scan(void);
178 void setclientstate(Client *c, long state);
179 void setgeom(const char *arg);
180 void setlayout(const char *arg);
181 void setmfact(const char *arg);
182 void setup(void);
183 void spawn(const char *arg);
184 void tag(const char *arg);
185 unsigned int textnw(const char *text, unsigned int len);
186 unsigned int textw(const char *text);
187 void tileh(void);
188 void tilehstack(unsigned int n);
189 Client *tilemaster(unsigned int n);
190 void tileresize(Client *c, int x, int y, int w, int h);
191 void tilev(void);
192 void tilevstack(unsigned int n);
193 void togglefloating(const char *arg);
194 void toggletag(const char *arg);
195 void toggleview(const char *arg);
196 void unban(Client *c);
197 void unmanage(Client *c);
198 void unmapnotify(XEvent *e);
199 void updatebarpos(void);
200 void updatesizehints(Client *c);
201 void updatetitle(Client *c);
202 void updatewmhints(Client *c);
203 void view(const char *arg);
204 void viewprevtag(const char *arg); /* views previous selected tags */
205 int xerror(Display *dpy, XErrorEvent *ee);
206 int xerrordummy(Display *dpy, XErrorEvent *ee);
207 int xerrorstart(Display *dpy, XErrorEvent *ee);
208 void zoom(const char *arg);
209
210 /* variables */
211 char stext[256], buf[256];
212 int screen, sx, sy, sw, sh;
213 int (*xerrorxlib)(Display *, XErrorEvent *);
214 int bx, by, bw, bh, blw, bgw, mx, my, mw, mh, mox, moy, mow, moh, tx, ty, tw, th, wx, wy, ww, wh;
215 double mfact;
216 unsigned int numlockmask = 0;
217 void (*handler[LASTEvent]) (XEvent *) = {
218 [ButtonPress] = buttonpress,
219 [ConfigureRequest] = configurerequest,
220 [ConfigureNotify] = configurenotify,
221 [DestroyNotify] = destroynotify,
222 [EnterNotify] = enternotify,
223 [Expose] = expose,
224 [FocusIn] = focusin,
225 [KeyPress] = keypress,
226 [MappingNotify] = mappingnotify,
227 [MapRequest] = maprequest,
228 [PropertyNotify] = propertynotify,
229 [UnmapNotify] = unmapnotify
230 };
231 Atom wmatom[WMLast], netatom[NetLast];
232 Bool otherwm, readin;
233 Bool running = True;
234 Bool *prevtags;
235 Bool *seltags;
236 Client *clients = NULL;
237 Client *sel = NULL;
238 Client *stack = NULL;
239 Cursor cursor[CurLast];
240 Display *dpy;
241 DC dc = {0};
242 Window root, barwin;
243
244 /* configuration, allows nested code to access above variables */
245 #include "config.h"
246 #define TAGSZ (LENGTH(tags) * sizeof(Bool))
247 Bool tmp[LENGTH(tags)];
248 Layout *lt = layouts;
249 Geom *geom = geoms;
250
251 /* function implementations */
252
253 void
254 applyrules(Client *c) {
255 unsigned int i;
256 Bool matched = False;
257 Rule *r;
258 XClassHint ch = { 0 };
259
260 /* rule matching */
261 XGetClassHint(dpy, c->win, &ch);
262 for(i = 0; i < LENGTH(rules); i++) {
263 r = &rules[i];
264 if((!r->title || strstr(c->name, r->title))
265 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
266 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
267 c->isfloating = r->isfloating;
268 if(r->tag) {
269 c->tags[idxoftag(r->tag)] = True;
270 matched = True;
271 }
272 }
273 }
274 if(ch.res_class)
275 XFree(ch.res_class);
276 if(ch.res_name)
277 XFree(ch.res_name);
278 if(!matched)
279 memcpy(c->tags, seltags, TAGSZ);
280 }
281
282 void
283 arrange(void) {
284 Client *c;
285
286 for(c = clients; c; c = c->next)
287 if(isvisible(c))
288 unban(c);
289 else
290 ban(c);
291
292 focus(NULL);
293 lt->arrange();
294 restack();
295 }
296
297 void
298 attach(Client *c) {
299 if(clients)
300 clients->prev = c;
301 c->next = clients;
302 clients = c;
303 }
304
305 void
306 attachstack(Client *c) {
307 c->snext = stack;
308 stack = c;
309 }
310
311 void
312 ban(Client *c) {
313 if(c->isbanned)
314 return;
315 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
316 c->isbanned = True;
317 }
318
319 void
320 buttonpress(XEvent *e) {
321 unsigned int i, x;
322 Client *c;
323 XButtonPressedEvent *ev = &e->xbutton;
324
325 if(ev->window == barwin) {
326 if((ev->x < bgw) && ev->button == Button1) {
327 setgeom(NULL);
328 return;
329 }
330 x = bgw;
331 for(i = 0; i < LENGTH(tags); i++) {
332 x += textw(tags[i]);
333 if(ev->x >= bgw && ev->x < x) {
334 if(ev->button == Button1) {
335 if(ev->state & MODKEY)
336 tag(tags[i]);
337 else
338 view(tags[i]);
339 }
340 else if(ev->button == Button3) {
341 if(ev->state & MODKEY)
342 toggletag(tags[i]);
343 else
344 toggleview(tags[i]);
345 }
346 return;
347 }
348 }
349 if((ev->x < x + blw) && ev->button == Button1)
350 setlayout(NULL);
351 }
352 else if((c = getclient(ev->window))) {
353 focus(c);
354 if(CLEANMASK(ev->state) != MODKEY)
355 return;
356 if(ev->button == Button1) {
357 restack();
358 movemouse(c);
359 }
360 else if(ev->button == Button2) {
361 if((floating != lt->arrange) && c->isfloating)
362 togglefloating(NULL);
363 else
364 zoom(NULL);
365 }
366 else if(ev->button == Button3 && !c->isfixed) {
367 restack();
368 resizemouse(c);
369 }
370 }
371 }
372
373 void
374 checkotherwm(void) {
375 otherwm = False;
376 XSetErrorHandler(xerrorstart);
377
378 /* this causes an error if some other window manager is running */
379 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
380 XSync(dpy, False);
381 if(otherwm)
382 eprint("dwm: another window manager is already running\n");
383 XSync(dpy, False);
384 XSetErrorHandler(NULL);
385 xerrorxlib = XSetErrorHandler(xerror);
386 XSync(dpy, False);
387 }
388
389 void
390 cleanup(void) {
391 close(STDIN_FILENO);
392 while(stack) {
393 unban(stack);
394 unmanage(stack);
395 }
396 if(dc.font.set)
397 XFreeFontSet(dpy, dc.font.set);
398 else
399 XFreeFont(dpy, dc.font.xfont);
400 XUngrabKey(dpy, AnyKey, AnyModifier, root);
401 XFreePixmap(dpy, dc.drawable);
402 XFreeGC(dpy, dc.gc);
403 XFreeCursor(dpy, cursor[CurNormal]);
404 XFreeCursor(dpy, cursor[CurResize]);
405 XFreeCursor(dpy, cursor[CurMove]);
406 XDestroyWindow(dpy, barwin);
407 XSync(dpy, False);
408 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
409 }
410
411 void
412 configure(Client *c) {
413 XConfigureEvent ce;
414
415 ce.type = ConfigureNotify;
416 ce.display = dpy;
417 ce.event = c->win;
418 ce.window = c->win;
419 ce.x = c->x;
420 ce.y = c->y;
421 ce.width = c->w;
422 ce.height = c->h;
423 ce.border_width = c->bw;
424 ce.above = None;
425 ce.override_redirect = False;
426 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
427 }
428
429 void
430 configurenotify(XEvent *e) {
431 XConfigureEvent *ev = &e->xconfigure;
432
433 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
434 sw = ev->width;
435 sh = ev->height;
436 setgeom(geom->symbol);
437 }
438 }
439
440 void
441 configurerequest(XEvent *e) {
442 Client *c;
443 XConfigureRequestEvent *ev = &e->xconfigurerequest;
444 XWindowChanges wc;
445
446 if((c = getclient(ev->window))) {
447 if(ev->value_mask & CWBorderWidth)
448 c->bw = ev->border_width;
449 if(c->isfixed || c->isfloating || lt->isfloating) {
450 if(ev->value_mask & CWX)
451 c->x = sx + ev->x;
452 if(ev->value_mask & CWY)
453 c->y = sy + ev->y;
454 if(ev->value_mask & CWWidth)
455 c->w = ev->width;
456 if(ev->value_mask & CWHeight)
457 c->h = ev->height;
458 if((c->x - sx + c->w) > sw && c->isfloating)
459 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
460 if((c->y - sy + c->h) > sh && c->isfloating)
461 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
462 if((ev->value_mask & (CWX|CWY))
463 && !(ev->value_mask & (CWWidth|CWHeight)))
464 configure(c);
465 if(isvisible(c))
466 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
467 }
468 else
469 configure(c);
470 }
471 else {
472 wc.x = ev->x;
473 wc.y = ev->y;
474 wc.width = ev->width;
475 wc.height = ev->height;
476 wc.border_width = ev->border_width;
477 wc.sibling = ev->above;
478 wc.stack_mode = ev->detail;
479 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
480 }
481 XSync(dpy, False);
482 }
483
484 unsigned int
485 counttiled(void) {
486 unsigned int n;
487 Client *c;
488
489 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
490 return n;
491 }
492
493 void
494 destroynotify(XEvent *e) {
495 Client *c;
496 XDestroyWindowEvent *ev = &e->xdestroywindow;
497
498 if((c = getclient(ev->window)))
499 unmanage(c);
500 }
501
502 void
503 detach(Client *c) {
504 if(c->prev)
505 c->prev->next = c->next;
506 if(c->next)
507 c->next->prev = c->prev;
508 if(c == clients)
509 clients = c->next;
510 c->next = c->prev = NULL;
511 }
512
513 void
514 detachstack(Client *c) {
515 Client **tc;
516
517 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
518 *tc = c->snext;
519 }
520
521 void
522 drawbar(void) {
523 int i, x;
524 Client *c;
525
526 dc.x = 0;
527 if(bgw > 0) {
528 dc.w = bgw;
529 drawtext(geom->symbol, dc.norm, False);
530 dc.x += bgw;
531 }
532 for(c = stack; c && !isvisible(c); c = c->snext);
533 for(i = 0; i < LENGTH(tags); i++) {
534 dc.w = textw(tags[i]);
535 if(seltags[i]) {
536 drawtext(tags[i], dc.sel, isurgent(i));
537 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
538 }
539 else {
540 drawtext(tags[i], dc.norm, isurgent(i));
541 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
542 }
543 dc.x += dc.w;
544 }
545 if(blw > 0) {
546 dc.w = blw;
547 drawtext(lt->symbol, dc.norm, False);
548 x = dc.x + dc.w;
549 }
550 else
551 x = dc.x;
552 dc.w = textw(stext);
553 dc.x = bw - dc.w;
554 if(dc.x < x) {
555 dc.x = x;
556 dc.w = bw - x;
557 }
558 drawtext(stext, dc.norm, False);
559 if((dc.w = dc.x - x) > bh) {
560 dc.x = x;
561 if(c) {
562 drawtext(c->name, dc.sel, False);
563 drawsquare(False, c->isfloating, False, dc.sel);
564 }
565 else
566 drawtext(NULL, dc.norm, False);
567 }
568 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
569 XSync(dpy, False);
570 }
571
572 void
573 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
574 int x;
575 XGCValues gcv;
576 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
577
578 gcv.foreground = col[invert ? ColBG : ColFG];
579 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
580 x = (dc.font.ascent + dc.font.descent + 2) / 4;
581 r.x = dc.x + 1;
582 r.y = dc.y + 1;
583 if(filled) {
584 r.width = r.height = x + 1;
585 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
586 }
587 else if(empty) {
588 r.width = r.height = x;
589 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
590 }
591 }
592
593 void
594 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
595 int x, y, w, h;
596 unsigned int len, olen;
597 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
598
599 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
600 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
601 if(!text)
602 return;
603 w = 0;
604 olen = len = strlen(text);
605 if(len >= sizeof buf)
606 len = sizeof buf - 1;
607 memcpy(buf, text, len);
608 buf[len] = 0;
609 h = dc.font.ascent + dc.font.descent;
610 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
611 x = dc.x + (h / 2);
612 /* shorten text if necessary */
613 while(len && (w = textnw(buf, len)) > dc.w - h)
614 buf[--len] = 0;
615 if(len < olen) {
616 if(len > 1)
617 buf[len - 1] = '.';
618 if(len > 2)
619 buf[len - 2] = '.';
620 if(len > 3)
621 buf[len - 3] = '.';
622 }
623 if(w > dc.w)
624 return; /* too long */
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
632 void *
633 emallocz(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
641 void
642 enternotify(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
654 void
655 eprint(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
664 void
665 expose(XEvent *e) {
666 XExposeEvent *ev = &e->xexpose;
667
668 if(ev->count == 0 && (ev->window == barwin))
669 drawbar();
670 }
671
672 void
673 floating(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
681 void
682 focus(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
704 void
705 focusin(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
712 void
713 focusnext(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
727 void
728 focusprev(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
744 Client *
745 getclient(Window w) {
746 Client *c;
747
748 for(c = clients; c && c->win != w; c = c->next);
749 return c;
750 }
751
752 unsigned long
753 getcolor(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
762 long
763 getstate(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
780 Bool
781 gettextprop(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
806 void
807 grabbuttons(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
824 void
825 grabkeys(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
853 unsigned int
854 idxoftag(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
861 void
862 initfont(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 if(dc.font.ascent < (*xfonts)->ascent)
884 dc.font.ascent = (*xfonts)->ascent;
885 if(dc.font.descent < (*xfonts)->descent)
886 dc.font.descent = (*xfonts)->descent;
887 xfonts++;
888 }
889 }
890 else {
891 if(dc.font.xfont)
892 XFreeFont(dpy, dc.font.xfont);
893 dc.font.xfont = NULL;
894 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
895 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
896 eprint("error, cannot load font: '%s'\n", fontstr);
897 dc.font.ascent = dc.font.xfont->ascent;
898 dc.font.descent = dc.font.xfont->descent;
899 }
900 dc.font.height = dc.font.ascent + dc.font.descent;
901 }
902
903 Bool
904 isoccupied(unsigned int t) {
905 Client *c;
906
907 for(c = clients; c; c = c->next)
908 if(c->tags[t])
909 return True;
910 return False;
911 }
912
913 Bool
914 isprotodel(Client *c) {
915 int i, n;
916 Atom *protocols;
917 Bool ret = False;
918
919 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
920 for(i = 0; !ret && i < n; i++)
921 if(protocols[i] == wmatom[WMDelete])
922 ret = True;
923 XFree(protocols);
924 }
925 return ret;
926 }
927
928 Bool
929 isurgent(unsigned int t) {
930 Client *c;
931
932 for(c = clients; c; c = c->next)
933 if(c->isurgent && c->tags[t])
934 return True;
935 return False;
936 }
937
938 Bool
939 isvisible(Client *c) {
940 unsigned int i;
941
942 for(i = 0; i < LENGTH(tags); i++)
943 if(c->tags[i] && seltags[i])
944 return True;
945 return False;
946 }
947
948 void
949 keypress(XEvent *e) {
950 unsigned int i;
951 KeySym keysym;
952 XKeyEvent *ev;
953
954 ev = &e->xkey;
955 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
956 for(i = 0; i < LENGTH(keys); i++)
957 if(keysym == keys[i].keysym
958 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
959 {
960 if(keys[i].func)
961 keys[i].func(keys[i].arg);
962 }
963 }
964
965 void
966 killclient(const char *arg) {
967 XEvent ev;
968
969 if(!sel)
970 return;
971 if(isprotodel(sel)) {
972 ev.type = ClientMessage;
973 ev.xclient.window = sel->win;
974 ev.xclient.message_type = wmatom[WMProtocols];
975 ev.xclient.format = 32;
976 ev.xclient.data.l[0] = wmatom[WMDelete];
977 ev.xclient.data.l[1] = CurrentTime;
978 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
979 }
980 else
981 XKillClient(dpy, sel->win);
982 }
983
984 void
985 manage(Window w, XWindowAttributes *wa) {
986 Client *c, *t = NULL;
987 Status rettrans;
988 Window trans;
989 XWindowChanges wc;
990
991 c = emallocz(sizeof(Client));
992 c->tags = emallocz(TAGSZ);
993 c->win = w;
994
995 /* geometry */
996 c->x = wa->x;
997 c->y = wa->y;
998 c->w = wa->width;
999 c->h = wa->height;
1000 c->oldbw = wa->border_width;
1001 if(c->w == sw && c->h == sh) {
1002 c->x = sx;
1003 c->y = sy;
1004 c->bw = wa->border_width;
1005 }
1006 else {
1007 if(c->x + c->w + 2 * c->bw > wx + ww)
1008 c->x = wx + ww - c->w - 2 * c->bw;
1009 if(c->y + c->h + 2 * c->bw > wy + wh)
1010 c->y = wy + wh - c->h - 2 * c->bw;
1011 if(c->x < wx)
1012 c->x = wx;
1013 if(c->y < wy)
1014 c->y = wy;
1015 c->bw = BORDERPX;
1016 }
1017
1018 wc.border_width = c->bw;
1019 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1020 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1021 configure(c); /* propagates border_width, if size doesn't change */
1022 updatesizehints(c);
1023 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1024 grabbuttons(c, False);
1025 updatetitle(c);
1026 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1027 for(t = clients; t && t->win != trans; t = t->next);
1028 if(t)
1029 memcpy(c->tags, t->tags, TAGSZ);
1030 else
1031 applyrules(c);
1032 if(!c->isfloating)
1033 c->isfloating = (rettrans == Success) || c->isfixed;
1034 attach(c);
1035 attachstack(c);
1036 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1037 ban(c);
1038 XMapWindow(dpy, c->win);
1039 setclientstate(c, NormalState);
1040 arrange();
1041 }
1042
1043 void
1044 mappingnotify(XEvent *e) {
1045 XMappingEvent *ev = &e->xmapping;
1046
1047 XRefreshKeyboardMapping(ev);
1048 if(ev->request == MappingKeyboard)
1049 grabkeys();
1050 }
1051
1052 void
1053 maprequest(XEvent *e) {
1054 static XWindowAttributes wa;
1055 XMapRequestEvent *ev = &e->xmaprequest;
1056
1057 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1058 return;
1059 if(wa.override_redirect)
1060 return;
1061 if(!getclient(ev->window))
1062 manage(ev->window, &wa);
1063 }
1064
1065 void
1066 monocle(void) {
1067 Client *c;
1068
1069 for(c = clients; c; c = c->next)
1070 if((lt->isfloating || !c->isfloating) && isvisible(c))
1071 resize(c, mox, moy, mow - 2 * c->bw, moh - 2 * c->bw, RESIZEHINTS);
1072 }
1073
1074 void
1075 movemouse(Client *c) {
1076 int x1, y1, ocx, ocy, di, nx, ny;
1077 unsigned int dui;
1078 Window dummy;
1079 XEvent ev;
1080
1081 ocx = nx = c->x;
1082 ocy = ny = c->y;
1083 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1084 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1085 return;
1086 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1087 for(;;) {
1088 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1089 switch (ev.type) {
1090 case ButtonRelease:
1091 XUngrabPointer(dpy, CurrentTime);
1092 return;
1093 case ConfigureRequest:
1094 case Expose:
1095 case MapRequest:
1096 handler[ev.type](&ev);
1097 break;
1098 case MotionNotify:
1099 XSync(dpy, False);
1100 nx = ocx + (ev.xmotion.x - x1);
1101 ny = ocy + (ev.xmotion.y - y1);
1102 if(abs(wx - nx) < SNAP)
1103 nx = wx;
1104 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < SNAP)
1105 nx = wx + ww - c->w - 2 * c->bw;
1106 if(abs(wy - ny) < SNAP)
1107 ny = wy;
1108 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < SNAP)
1109 ny = wy + wh - c->h - 2 * c->bw;
1110 if(!c->isfloating && !lt->isfloating && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1111 togglefloating(NULL);
1112 if((lt->isfloating) || c->isfloating)
1113 resize(c, nx, ny, c->w, c->h, False);
1114 break;
1115 }
1116 }
1117 }
1118
1119 Client *
1120 nexttiled(Client *c) {
1121 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1122 return c;
1123 }
1124
1125 void
1126 propertynotify(XEvent *e) {
1127 Client *c;
1128 Window trans;
1129 XPropertyEvent *ev = &e->xproperty;
1130
1131 if(ev->state == PropertyDelete)
1132 return; /* ignore */
1133 if((c = getclient(ev->window))) {
1134 switch (ev->atom) {
1135 default: break;
1136 case XA_WM_TRANSIENT_FOR:
1137 XGetTransientForHint(dpy, c->win, &trans);
1138 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1139 arrange();
1140 break;
1141 case XA_WM_NORMAL_HINTS:
1142 updatesizehints(c);
1143 break;
1144 case XA_WM_HINTS:
1145 updatewmhints(c);
1146 drawbar();
1147 break;
1148 }
1149 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1150 updatetitle(c);
1151 if(c == sel)
1152 drawbar();
1153 }
1154 }
1155 }
1156
1157 void
1158 quit(const char *arg) {
1159 readin = running = False;
1160 }
1161
1162 void
1163 reapply(const char *arg) {
1164 static Bool zerotags[LENGTH(tags)] = { 0 };
1165 Client *c;
1166
1167 for(c = clients; c; c = c->next) {
1168 memcpy(c->tags, zerotags, sizeof zerotags);
1169 applyrules(c);
1170 }
1171 arrange();
1172 }
1173
1174 void
1175 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1176 XWindowChanges wc;
1177
1178 if(sizehints) {
1179 /* set minimum possible */
1180 if(w < 1)
1181 w = 1;
1182 if(h < 1)
1183 h = 1;
1184
1185 /* temporarily remove base dimensions */
1186 w -= c->basew;
1187 h -= c->baseh;
1188
1189 /* adjust for aspect limits */
1190 if(c->minax != c->maxax && c->minay != c->maxay
1191 && c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0)
1192 {
1193 if(w * c->maxay > h * c->maxax)
1194 w = h * c->maxax / c->maxay;
1195 else if(w * c->minay < h * c->minax)
1196 h = w * c->minay / c->minax;
1197 }
1198
1199 /* adjust for increment value */
1200 if(c->incw)
1201 w -= w % c->incw;
1202 if(c->inch)
1203 h -= h % c->inch;
1204
1205 /* restore base dimensions */
1206 w += c->basew;
1207 h += c->baseh;
1208
1209 if(c->minw > 0 && w < c->minw)
1210 w = c->minw;
1211 if(c->minh > 0 && h < c->minh)
1212 h = c->minh;
1213 if(c->maxw > 0 && w > c->maxw)
1214 w = c->maxw;
1215 if(c->maxh > 0 && h > c->maxh)
1216 h = c->maxh;
1217 }
1218 if(w <= 0 || h <= 0)
1219 return;
1220 if(x > sx + sw)
1221 x = sw - w - 2 * c->bw;
1222 if(y > sy + sh)
1223 y = sh - h - 2 * c->bw;
1224 if(x + w + 2 * c->bw < sx)
1225 x = sx;
1226 if(y + h + 2 * c->bw < sy)
1227 y = sy;
1228 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1229 c->x = wc.x = x;
1230 c->y = wc.y = y;
1231 c->w = wc.width = w;
1232 c->h = wc.height = h;
1233 wc.border_width = c->bw;
1234 XConfigureWindow(dpy, c->win,
1235 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1236 configure(c);
1237 XSync(dpy, False);
1238 }
1239 }
1240
1241 void
1242 resizemouse(Client *c) {
1243 int ocx, ocy;
1244 int nw, nh;
1245 XEvent ev;
1246
1247 ocx = c->x;
1248 ocy = c->y;
1249 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1250 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1251 return;
1252 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1253 for(;;) {
1254 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1255 switch(ev.type) {
1256 case ButtonRelease:
1257 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1258 c->w + c->bw - 1, c->h + c->bw - 1);
1259 XUngrabPointer(dpy, CurrentTime);
1260 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1261 return;
1262 case ConfigureRequest:
1263 case Expose:
1264 case MapRequest:
1265 handler[ev.type](&ev);
1266 break;
1267 case MotionNotify:
1268 XSync(dpy, False);
1269 if((nw = ev.xmotion.x - ocx - 2 * c->bw + 1) <= 0)
1270 nw = 1;
1271 if((nh = ev.xmotion.y - ocy - 2 * c->bw + 1) <= 0)
1272 nh = 1;
1273 if(!c->isfloating && !lt->isfloating && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1274 togglefloating(NULL);
1275 if((lt->isfloating) || c->isfloating)
1276 resize(c, c->x, c->y, nw, nh, True);
1277 break;
1278 }
1279 }
1280 }
1281
1282 void
1283 restack(void) {
1284 Client *c;
1285 XEvent ev;
1286 XWindowChanges wc;
1287
1288 drawbar();
1289 if(!sel)
1290 return;
1291 if(sel->isfloating || lt->isfloating)
1292 XRaiseWindow(dpy, sel->win);
1293 if(!lt->isfloating) {
1294 wc.stack_mode = Below;
1295 wc.sibling = barwin;
1296 if(!sel->isfloating) {
1297 XConfigureWindow(dpy, sel->win, CWSibling|CWStackMode, &wc);
1298 wc.sibling = sel->win;
1299 }
1300 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1301 if(c == sel)
1302 continue;
1303 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1304 wc.sibling = c->win;
1305 }
1306 }
1307 XSync(dpy, False);
1308 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1309 }
1310
1311 void
1312 run(void) {
1313 char *p;
1314 char sbuf[sizeof stext];
1315 fd_set rd;
1316 int r, xfd;
1317 unsigned int len, offset;
1318 XEvent ev;
1319
1320 /* main event loop, also reads status text from stdin */
1321 XSync(dpy, False);
1322 xfd = ConnectionNumber(dpy);
1323 readin = True;
1324 offset = 0;
1325 len = sizeof stext - 1;
1326 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1327 while(running) {
1328 FD_ZERO(&rd);
1329 if(readin)
1330 FD_SET(STDIN_FILENO, &rd);
1331 FD_SET(xfd, &rd);
1332 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1333 if(errno == EINTR)
1334 continue;
1335 eprint("select failed\n");
1336 }
1337 if(FD_ISSET(STDIN_FILENO, &rd)) {
1338 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1339 case -1:
1340 strncpy(stext, strerror(errno), len);
1341 readin = False;
1342 break;
1343 case 0:
1344 strncpy(stext, "EOF", 4);
1345 readin = False;
1346 break;
1347 default:
1348 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1349 if(*p == '\n' || *p == '\0') {
1350 *p = '\0';
1351 strncpy(stext, sbuf, len);
1352 p += r - 1; /* p is sbuf + offset + r - 1 */
1353 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1354 offset = r;
1355 if(r)
1356 memmove(sbuf, p - r + 1, r);
1357 break;
1358 }
1359 break;
1360 }
1361 drawbar();
1362 }
1363 while(XPending(dpy)) {
1364 XNextEvent(dpy, &ev);
1365 if(handler[ev.type])
1366 (handler[ev.type])(&ev); /* call handler */
1367 }
1368 }
1369 }
1370
1371 void
1372 scan(void) {
1373 unsigned int i, num;
1374 Window *wins, d1, d2;
1375 XWindowAttributes wa;
1376
1377 wins = NULL;
1378 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1379 for(i = 0; i < num; i++) {
1380 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1381 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1382 continue;
1383 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1384 manage(wins[i], &wa);
1385 }
1386 for(i = 0; i < num; i++) { /* now the transients */
1387 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1388 continue;
1389 if(XGetTransientForHint(dpy, wins[i], &d1)
1390 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1391 manage(wins[i], &wa);
1392 }
1393 }
1394 if(wins)
1395 XFree(wins);
1396 }
1397
1398 void
1399 setclientstate(Client *c, long state) {
1400 long data[] = {state, None};
1401
1402 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1403 PropModeReplace, (unsigned char *)data, 2);
1404 }
1405
1406 void
1407 setgeom(const char *arg) {
1408 unsigned int i;
1409
1410 if(!arg) {
1411 if(++geom == &geoms[LENGTH(geoms)])
1412 geom = &geoms[0];
1413 }
1414 else {
1415 for(i = 0; i < LENGTH(geoms); i++)
1416 if(!strcmp(geoms[i].symbol, arg))
1417 break;
1418 if(i == LENGTH(geoms))
1419 return;
1420 geom = &geoms[i];
1421 }
1422 geom->apply();
1423 updatebarpos();
1424 arrange();
1425 }
1426
1427 void
1428 setlayout(const char *arg) {
1429 unsigned int i;
1430
1431 if(!arg) {
1432 if(++lt == &layouts[LENGTH(layouts)])
1433 lt = &layouts[0];
1434 }
1435 else {
1436 for(i = 0; i < LENGTH(layouts); i++)
1437 if(!strcmp(arg, layouts[i].symbol))
1438 break;
1439 if(i == LENGTH(layouts))
1440 return;
1441 lt = &layouts[i];
1442 }
1443 if(sel)
1444 arrange();
1445 else
1446 drawbar();
1447 }
1448
1449 void
1450 setmfact(const char *arg) {
1451 double d;
1452
1453 if(lt->isfloating)
1454 return;
1455 if(!arg)
1456 mfact = MFACT;
1457 else {
1458 d = strtod(arg, NULL);
1459 if(arg[0] == '-' || arg[0] == '+')
1460 d += mfact;
1461 if(d < 0.1 || d > 0.9)
1462 return;
1463 mfact = d;
1464 }
1465 setgeom(geom->symbol);
1466 }
1467
1468 void
1469 setup(void) {
1470 unsigned int i, w;
1471 XSetWindowAttributes wa;
1472
1473 /* init screen */
1474 screen = DefaultScreen(dpy);
1475 root = RootWindow(dpy, screen);
1476 initfont(FONT);
1477
1478 /* apply default geometry */
1479 sx = 0;
1480 sy = 0;
1481 sw = DisplayWidth(dpy, screen);
1482 sh = DisplayHeight(dpy, screen);
1483 bh = dc.font.height + 2;
1484 mfact = MFACT;
1485 geom->apply();
1486
1487 /* init atoms */
1488 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1489 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1490 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1491 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1492 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1493 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1494
1495 /* init cursors */
1496 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1497 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1498 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1499
1500 /* init appearance */
1501 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1502 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1503 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1504 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1505 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1506 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1507 initfont(FONT);
1508 dc.h = bh;
1509 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1510 dc.gc = XCreateGC(dpy, root, 0, 0);
1511 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1512 if(!dc.font.set)
1513 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1514
1515 /* init tags */
1516 seltags = emallocz(TAGSZ);
1517 prevtags = emallocz(TAGSZ);
1518 seltags[0] = prevtags[0] = True;
1519
1520 /* init bar */
1521 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1522 w = textw(layouts[i].symbol);
1523 if(w > blw)
1524 blw = w;
1525 }
1526 for(bgw = i = 0; LENGTH(geoms) > 1 && i < LENGTH(geoms); i++) {
1527 w = textw(geoms[i].symbol);
1528 if(w > bgw)
1529 bgw = w;
1530 }
1531
1532 wa.override_redirect = 1;
1533 wa.background_pixmap = ParentRelative;
1534 wa.event_mask = ButtonPressMask|ExposureMask;
1535
1536 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1537 CopyFromParent, DefaultVisual(dpy, screen),
1538 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1539 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1540 XMapRaised(dpy, barwin);
1541 strcpy(stext, "dwm-"VERSION);
1542 drawbar();
1543
1544 /* EWMH support per view */
1545 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1546 PropModeReplace, (unsigned char *) netatom, NetLast);
1547
1548 /* select for events */
1549 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1550 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1551 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1552 XSelectInput(dpy, root, wa.event_mask);
1553
1554
1555 /* grab keys */
1556 grabkeys();
1557 }
1558
1559 void
1560 spawn(const char *arg) {
1561 static char *shell = NULL;
1562
1563 if(!shell && !(shell = getenv("SHELL")))
1564 shell = "/bin/sh";
1565 if(!arg)
1566 return;
1567 /* The double-fork construct avoids zombie processes and keeps the code
1568 * clean from stupid signal handlers. */
1569 if(fork() == 0) {
1570 if(fork() == 0) {
1571 if(dpy)
1572 close(ConnectionNumber(dpy));
1573 setsid();
1574 execl(shell, shell, "-c", arg, (char *)NULL);
1575 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1576 perror(" failed");
1577 }
1578 exit(0);
1579 }
1580 wait(0);
1581 }
1582
1583 void
1584 tag(const char *arg) {
1585 unsigned int i;
1586
1587 if(!sel)
1588 return;
1589 for(i = 0; i < LENGTH(tags); i++)
1590 sel->tags[i] = (NULL == arg);
1591 sel->tags[idxoftag(arg)] = True;
1592 arrange();
1593 }
1594
1595 unsigned int
1596 textnw(const char *text, unsigned int len) {
1597 XRectangle r;
1598
1599 if(dc.font.set) {
1600 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1601 return r.width;
1602 }
1603 return XTextWidth(dc.font.xfont, text, len);
1604 }
1605
1606 unsigned int
1607 textw(const char *text) {
1608 return textnw(text, strlen(text)) + dc.font.height;
1609 }
1610
1611 void
1612 tileh(void) {
1613 int x, w;
1614 unsigned int i, n = counttiled();
1615 Client *c;
1616
1617 if(n == 0)
1618 return;
1619 c = tilemaster(n);
1620 if(--n == 0)
1621 return;
1622
1623 x = tx;
1624 w = tw / n;
1625 if(w < bh)
1626 w = tw;
1627
1628 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1629 if(i + 1 == n) /* remainder */
1630 tileresize(c, x, ty, (tx + tw) - x - 2 * c->bw, th - 2 * c->bw);
1631 else
1632 tileresize(c, x, ty, w - 2 * c->bw, th - 2 * c->bw);
1633 if(w != tw)
1634 x = c->x + c->w + 2 * c->bw;
1635 }
1636 }
1637
1638 Client *
1639 tilemaster(unsigned int n) {
1640 Client *c = nexttiled(clients);
1641
1642 if(n == 1)
1643 tileresize(c, mox, moy, mow - 2 * c->bw, moh - 2 * c->bw);
1644 else
1645 tileresize(c, mx, my, mw - 2 * c->bw, mh - 2 * c->bw);
1646 return c;
1647 }
1648
1649 void
1650 tileresize(Client *c, int x, int y, int w, int h) {
1651 resize(c, x, y, w, h, RESIZEHINTS);
1652 if((RESIZEHINTS) && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
1653 /* client doesn't accept size constraints */
1654 resize(c, x, y, w, h, False);
1655 }
1656
1657 void
1658 tilev(void) {
1659 int y, h;
1660 unsigned int i, n = counttiled();
1661 Client *c;
1662
1663 if(n == 0)
1664 return;
1665 c = tilemaster(n);
1666 if(--n == 0)
1667 return;
1668
1669 y = ty;
1670 h = th / n;
1671 if(h < bh)
1672 h = th;
1673
1674 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1675 if(i + 1 == n) /* remainder */
1676 tileresize(c, tx, y, tw - 2 * c->bw, (ty + th) - y - 2 * c->bw);
1677 else
1678 tileresize(c, tx, y, tw - 2 * c->bw, h - 2 * c->bw);
1679 if(h != th)
1680 y = c->y + c->h + 2 * c->bw;
1681 }
1682 }
1683
1684 void
1685 togglefloating(const char *arg) {
1686 if(!sel)
1687 return;
1688 sel->isfloating = !sel->isfloating;
1689 if(sel->isfloating)
1690 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1691 arrange();
1692 }
1693
1694 void
1695 toggletag(const char *arg) {
1696 unsigned int i, j;
1697
1698 if(!sel)
1699 return;
1700 i = idxoftag(arg);
1701 sel->tags[i] = !sel->tags[i];
1702 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1703 if(j == LENGTH(tags))
1704 sel->tags[i] = True; /* at least one tag must be enabled */
1705 arrange();
1706 }
1707
1708 void
1709 toggleview(const char *arg) {
1710 unsigned int i, j;
1711
1712 i = idxoftag(arg);
1713 seltags[i] = !seltags[i];
1714 for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1715 if(j == LENGTH(tags))
1716 seltags[i] = True; /* at least one tag must be viewed */
1717 arrange();
1718 }
1719
1720 void
1721 unban(Client *c) {
1722 if(!c->isbanned)
1723 return;
1724 XMoveWindow(dpy, c->win, c->x, c->y);
1725 c->isbanned = False;
1726 }
1727
1728 void
1729 unmanage(Client *c) {
1730 XWindowChanges wc;
1731
1732 wc.border_width = c->oldbw;
1733 /* The server grab construct avoids race conditions. */
1734 XGrabServer(dpy);
1735 XSetErrorHandler(xerrordummy);
1736 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1737 detach(c);
1738 detachstack(c);
1739 if(sel == c)
1740 focus(NULL);
1741 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1742 setclientstate(c, WithdrawnState);
1743 free(c->tags);
1744 free(c);
1745 XSync(dpy, False);
1746 XSetErrorHandler(xerror);
1747 XUngrabServer(dpy);
1748 arrange();
1749 }
1750
1751 void
1752 unmapnotify(XEvent *e) {
1753 Client *c;
1754 XUnmapEvent *ev = &e->xunmap;
1755
1756 if((c = getclient(ev->window)))
1757 unmanage(c);
1758 }
1759
1760 void
1761 updatebarpos(void) {
1762
1763 if(dc.drawable != 0)
1764 XFreePixmap(dpy, dc.drawable);
1765 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1766 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1767 }
1768
1769 void
1770 updatesizehints(Client *c) {
1771 long msize;
1772 XSizeHints size;
1773
1774 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1775 size.flags = PSize;
1776 c->flags = size.flags;
1777 if(c->flags & PBaseSize) {
1778 c->basew = size.base_width;
1779 c->baseh = size.base_height;
1780 }
1781 else if(c->flags & PMinSize) {
1782 c->basew = size.min_width;
1783 c->baseh = size.min_height;
1784 }
1785 else
1786 c->basew = c->baseh = 0;
1787 if(c->flags & PResizeInc) {
1788 c->incw = size.width_inc;
1789 c->inch = size.height_inc;
1790 }
1791 else
1792 c->incw = c->inch = 0;
1793 if(c->flags & PMaxSize) {
1794 c->maxw = size.max_width;
1795 c->maxh = size.max_height;
1796 }
1797 else
1798 c->maxw = c->maxh = 0;
1799 if(c->flags & PMinSize) {
1800 c->minw = size.min_width;
1801 c->minh = size.min_height;
1802 }
1803 else if(c->flags & PBaseSize) {
1804 c->minw = size.base_width;
1805 c->minh = size.base_height;
1806 }
1807 else
1808 c->minw = c->minh = 0;
1809 if(c->flags & PAspect) {
1810 c->minax = size.min_aspect.x;
1811 c->maxax = size.max_aspect.x;
1812 c->minay = size.min_aspect.y;
1813 c->maxay = size.max_aspect.y;
1814 }
1815 else
1816 c->minax = c->maxax = c->minay = c->maxay = 0;
1817 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1818 && c->maxw == c->minw && c->maxh == c->minh);
1819 }
1820
1821 void
1822 updatetitle(Client *c) {
1823 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1824 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1825 }
1826
1827 void
1828 updatewmhints(Client *c) {
1829 XWMHints *wmh;
1830
1831 if((wmh = XGetWMHints(dpy, c->win))) {
1832 if(c == sel)
1833 sel->isurgent = False;
1834 else
1835 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1836 XFree(wmh);
1837 }
1838 }
1839
1840
1841 void
1842 view(const char *arg) {
1843 unsigned int i;
1844
1845 for(i = 0; i < LENGTH(tags); i++)
1846 tmp[i] = (NULL == arg);
1847 tmp[idxoftag(arg)] = True;
1848
1849 if(memcmp(seltags, tmp, TAGSZ) != 0) {
1850 memcpy(prevtags, seltags, TAGSZ);
1851 memcpy(seltags, tmp, TAGSZ);
1852 arrange();
1853 }
1854 }
1855
1856 void
1857 viewprevtag(const char *arg) {
1858
1859 memcpy(tmp, seltags, TAGSZ);
1860 memcpy(seltags, prevtags, TAGSZ);
1861 memcpy(prevtags, tmp, TAGSZ);
1862 arrange();
1863 }
1864
1865 /* There's no way to check accesses to destroyed windows, thus those cases are
1866 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1867 * default error handler, which may call exit. */
1868 int
1869 xerror(Display *dpy, XErrorEvent *ee) {
1870 if(ee->error_code == BadWindow
1871 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1872 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1873 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1874 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1875 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1876 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1877 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1878 return 0;
1879 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1880 ee->request_code, ee->error_code);
1881 return xerrorxlib(dpy, ee); /* may call exit */
1882 }
1883
1884 int
1885 xerrordummy(Display *dpy, XErrorEvent *ee) {
1886 return 0;
1887 }
1888
1889 /* Startup Error handler to check if another window manager
1890 * is already running. */
1891 int
1892 xerrorstart(Display *dpy, XErrorEvent *ee) {
1893 otherwm = True;
1894 return -1;
1895 }
1896
1897 void
1898 zoom(const char *arg) {
1899 Client *c = sel;
1900
1901 if(!sel || lt->isfloating || sel->isfloating)
1902 return;
1903 if(c == nexttiled(clients))
1904 if(!(c = nexttiled(c->next)))
1905 return;
1906 detach(c);
1907 attach(c);
1908 focus(c);
1909 arrange();
1910 }
1911
1912 int
1913 main(int argc, char *argv[]) {
1914 if(argc == 2 && !strcmp("-v", argv[1]))
1915 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1916 else if(argc != 1)
1917 eprint("usage: dwm [-v]\n");
1918
1919 setlocale(LC_CTYPE, "");
1920 if(!(dpy = XOpenDisplay(0)))
1921 eprint("dwm: cannot open display\n");
1922
1923 checkotherwm();
1924 setup();
1925 scan();
1926 run();
1927 cleanup();
1928
1929 XCloseDisplay(dpy);
1930 return 0;
1931 }
1932