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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 <regex.h>
37 #include <X11/cursorfont.h>
38 #include <X11/keysym.h>
39 #include <X11/Xatom.h>
40 #include <X11/Xlib.h>
41 #include <X11/Xproto.h>
42 #include <X11/Xutil.h>
43 /*
44 * TODO: Idea:
45 * I intend to not provide real Xinerama support, but instead having a Column
46 * tilecols[] array which is used by tile(), and a Column maxcols[] arrays which is used by
47 * maximise(). Those arrays should be initialized in config.h. For simplicity
48 * reasons mwfact should be replaced with a more advanced method which
49 * implements the same, but using the boundary between tilecols[0] and
50 * tilecols[1] instead. Besides this, get rid of BARPOS and use instead the
51 * following mechanism:
52 *
53 * #define BX 0
54 * #define BY 0
55 * #define BW sw
56 * bh is calculated automatically and should be used for the
57 */
58 //#ifdef XINERAMA
59 #include <X11/extensions/Xinerama.h>
60 //#endif
61
62 /* macros */
63 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
64 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
65 #define LENGTH(x) (sizeof x / sizeof x[0])
66 #define MAXTAGLEN 16
67 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
68
69
70 /* enums */
71 enum { BarTop, BarBot, BarOff }; /* bar position */
72 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
73 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
74 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
75 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
76
77 /* typedefs */
78 typedef struct Client Client;
79 struct Client {
80 char name[256];
81 int x, y, w, h;
82 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
83 int minax, maxax, minay, maxay;
84 long flags;
85 unsigned int border, oldborder;
86 Bool isbanned, isfixed, isfloating, isurgent;
87 Bool *tags;
88 Client *next;
89 Client *prev;
90 Client *snext;
91 Window win;
92 };
93
94 typedef struct {
95 int x, y, w, h;
96 } Column;
97
98 typedef struct {
99 int x, y, w, h;
100 unsigned long norm[ColLast];
101 unsigned long sel[ColLast];
102 Drawable drawable;
103 GC gc;
104 struct {
105 int ascent;
106 int descent;
107 int height;
108 XFontSet set;
109 XFontStruct *xfont;
110 } font;
111 } DC; /* draw context */
112
113 typedef struct {
114 unsigned long mod;
115 KeySym keysym;
116 void (*func)(const char *arg);
117 const char *arg;
118 } Key;
119
120 typedef struct {
121 const char *symbol;
122 void (*arrange)(void);
123 } Layout;
124
125 typedef struct {
126 const char *prop;
127 const char *tag;
128 Bool isfloating;
129 } Rule;
130
131 /* function declarations */
132 void applyrules(Client *c);
133 void arrange(void);
134 void attach(Client *c);
135 void attachstack(Client *c);
136 void ban(Client *c);
137 void buttonpress(XEvent *e);
138 void checkotherwm(void);
139 void cleanup(void);
140 void configure(Client *c);
141 void configurenotify(XEvent *e);
142 void configurerequest(XEvent *e);
143 void destroynotify(XEvent *e);
144 void detach(Client *c);
145 void detachstack(Client *c);
146 void drawbar(void);
147 void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
148 void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
149 void *emallocz(unsigned int size);
150 void enternotify(XEvent *e);
151 void eprint(const char *errstr, ...);
152 void expose(XEvent *e);
153 void floating(void); /* default floating layout */
154 void focus(Client *c);
155 void focusin(XEvent *e);
156 void focusnext(const char *arg);
157 void focusprev(const char *arg);
158 Client *getclient(Window w);
159 unsigned long getcolor(const char *colstr);
160 long getstate(Window w);
161 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
162 void grabbuttons(Client *c, Bool focused);
163 void grabkeys(void);
164 unsigned int idxoftag(const char *t);
165 void initfont(const char *fontstr);
166 Bool isoccupied(unsigned int t);
167 Bool isprotodel(Client *c);
168 Bool isurgent(unsigned int t);
169 Bool isvisible(Client *c);
170 void keypress(XEvent *e);
171 void killclient(const char *arg);
172 void manage(Window w, XWindowAttributes *wa);
173 void mappingnotify(XEvent *e);
174 void maprequest(XEvent *e);
175 void maximise(void);
176 void movemouse(Client *c);
177 Client *nexttiled(Client *c);
178 void propertynotify(XEvent *e);
179 void quit(const char *arg);
180 void reapply(const char *arg);
181 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
182 void resizemouse(Client *c);
183 void restack(void);
184 void run(void);
185 void scan(void);
186 void setclientstate(Client *c, long state);
187 void setlayout(const char *arg);
188 void setmwfact(const char *arg);
189 void setup(void);
190 void spawn(const char *arg);
191 void tag(const char *arg);
192 unsigned int textnw(const char *text, unsigned int len);
193 unsigned int textw(const char *text);
194 void tile(void);
195 void togglebar(const char *arg);
196 void togglefloating(const char *arg);
197 void toggletag(const char *arg);
198 void toggleview(const char *arg);
199 void unban(Client *c);
200 void unmanage(Client *c);
201 void unmapnotify(XEvent *e);
202 void updatebarpos(void);
203 void updatesizehints(Client *c);
204 void updatetitle(Client *c);
205 void updatewmhints(Client *c);
206 void view(const char *arg);
207 void viewprevtag(const char *arg); /* views previous selected tags */
208 int xerror(Display *dpy, XErrorEvent *ee);
209 int xerrordummy(Display *dpy, XErrorEvent *ee);
210 int xerrorstart(Display *dpy, XErrorEvent *ee);
211 void zoom(const char *arg);
212 void selectview(const char *arg);
213
214 /* variables */
215 char stext[256], buf[256];
216 double mwfact;
217 int screen, sx, sy, sw, sh, wax, way, waw, wah, ncols;
218 int (*xerrorxlib)(Display *, XErrorEvent *);
219 unsigned int bh, bpos;
220 unsigned int blw = 0;
221 unsigned int numlockmask = 0;
222 void (*handler[LASTEvent]) (XEvent *) = {
223 [ButtonPress] = buttonpress,
224 [ConfigureRequest] = configurerequest,
225 [ConfigureNotify] = configurenotify,
226 [DestroyNotify] = destroynotify,
227 [EnterNotify] = enternotify,
228 [Expose] = expose,
229 [FocusIn] = focusin,
230 [KeyPress] = keypress,
231 [MappingNotify] = mappingnotify,
232 [MapRequest] = maprequest,
233 [PropertyNotify] = propertynotify,
234 [UnmapNotify] = unmapnotify
235 };
236 Atom wmatom[WMLast], netatom[NetLast];
237 Bool domwfact = True;
238 Bool dozoom = True;
239 Bool otherwm, readin;
240 Bool running = True;
241 Bool *prevtags;
242 Bool *seltags;
243 Client *clients = NULL;
244 Client *sel = NULL;
245 Client *stack = NULL;
246 Column *cols = NULL;
247 Cursor cursor[CurLast];
248 Display *dpy;
249 DC dc = {0};
250 Layout *lt;
251 Window root, barwin;
252
253 /* configuration, allows nested code to access above variables */
254 #include "config.h"
255 #define TAGSZ (LENGTH(tags) * sizeof(Bool))
256 static Bool tmp[LENGTH(tags)];
257
258 /* function implementations */
259
260 void
261 applyrules(Client *c) {
262 unsigned int i;
263 Bool matched = False;
264 Rule *r;
265 XClassHint ch = { 0 };
266
267 /* rule matching */
268 XGetClassHint(dpy, c->win, &ch);
269 for(i = 0; i < LENGTH(rules); i++) {
270 r = &rules[i];
271 if(strstr(c->name, r->prop)
272 || (ch.res_class && strstr(ch.res_class, r->prop))
273 || (ch.res_name && strstr(ch.res_name, r->prop)))
274 {
275 c->isfloating = r->isfloating;
276 if(r->tag) {
277 c->tags[idxoftag(r->tag)] = True;
278 matched = True;
279 }
280 }
281 }
282 if(ch.res_class)
283 XFree(ch.res_class);
284 if(ch.res_name)
285 XFree(ch.res_name);
286 if(!matched)
287 memcpy(c->tags, seltags, TAGSZ);
288 }
289
290 void
291 arrange(void) {
292 Client *c;
293
294 for(c = clients; c; c = c->next)
295 if(isvisible(c))
296 unban(c);
297 else
298 ban(c);
299
300 focus(NULL);
301 lt->arrange();
302 restack();
303 }
304
305 void
306 attach(Client *c) {
307 if(clients)
308 clients->prev = c;
309 c->next = clients;
310 clients = c;
311 }
312
313 void
314 attachstack(Client *c) {
315 c->snext = stack;
316 stack = c;
317 }
318
319 void
320 ban(Client *c) {
321 if(c->isbanned)
322 return;
323 XMoveWindow(dpy, c->win, c->x + 3 * sw, c->y);
324 c->isbanned = True;
325 }
326
327 void
328 buttonpress(XEvent *e) {
329 unsigned int i, x;
330 Client *c;
331 XButtonPressedEvent *ev = &e->xbutton;
332
333 if(ev->window == barwin) {
334 x = 0;
335 for(i = 0; i < LENGTH(tags); i++) {
336 x += textw(tags[i]);
337 if(ev->x < x) {
338 if(ev->button == Button1) {
339 if(ev->state & MODKEY)
340 tag(tags[i]);
341 else
342 view(tags[i]);
343 }
344 else if(ev->button == Button3) {
345 if(ev->state & MODKEY)
346 toggletag(tags[i]);
347 else
348 toggleview(tags[i]);
349 }
350 return;
351 }
352 }
353 if((ev->x < x + blw) && ev->button == Button1)
354 setlayout(NULL);
355 }
356 else if((c = getclient(ev->window))) {
357 focus(c);
358 if(CLEANMASK(ev->state) != MODKEY)
359 return;
360 if(ev->button == Button1) {
361 restack();
362 movemouse(c);
363 }
364 else if(ev->button == Button2) {
365 if((floating != lt->arrange) && c->isfloating)
366 togglefloating(NULL);
367 else
368 zoom(NULL);
369 }
370 else if(ev->button == Button3 && !c->isfixed) {
371 restack();
372 resizemouse(c);
373 }
374 }
375 }
376
377 void
378 checkotherwm(void) {
379 otherwm = False;
380 XSetErrorHandler(xerrorstart);
381
382 /* this causes an error if some other window manager is running */
383 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
384 XSync(dpy, False);
385 if(otherwm)
386 eprint("dwm: another window manager is already running\n");
387 XSync(dpy, False);
388 XSetErrorHandler(NULL);
389 xerrorxlib = XSetErrorHandler(xerror);
390 XSync(dpy, False);
391 }
392
393 void
394 cleanup(void) {
395
396 close(STDIN_FILENO);
397 while(stack) {
398 unban(stack);
399 unmanage(stack);
400 }
401 if(dc.font.set)
402 XFreeFontSet(dpy, dc.font.set);
403 else
404 XFreeFont(dpy, dc.font.xfont);
405
406 XUngrabKey(dpy, AnyKey, AnyModifier, root);
407 XFreePixmap(dpy, dc.drawable);
408 XFreeGC(dpy, dc.gc);
409 XFreeCursor(dpy, cursor[CurNormal]);
410 XFreeCursor(dpy, cursor[CurResize]);
411 XFreeCursor(dpy, cursor[CurMove]);
412 XDestroyWindow(dpy, barwin);
413 XSync(dpy, False);
414 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
415 }
416
417 void
418 configure(Client *c) {
419 XConfigureEvent ce;
420
421 ce.type = ConfigureNotify;
422 ce.display = dpy;
423 ce.event = c->win;
424 ce.window = c->win;
425 ce.x = c->x;
426 ce.y = c->y;
427 ce.width = c->w;
428 ce.height = c->h;
429 ce.border_width = c->border;
430 ce.above = None;
431 ce.override_redirect = False;
432 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
433 }
434
435 void
436 configurenotify(XEvent *e) {
437 XConfigureEvent *ev = &e->xconfigure;
438
439 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
440 /* TODO -- use Xinerama dimensions here ? */
441 sw = ev->width;
442 sh = ev->height;
443 XFreePixmap(dpy, dc.drawable);
444 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(root, screen), bh, DefaultDepth(dpy, screen));
445 XResizeWindow(dpy, barwin, sw, bh);
446 updatebarpos();
447 arrange();
448 }
449 }
450
451 void
452 configurerequest(XEvent *e) {
453 Client *c;
454 XConfigureRequestEvent *ev = &e->xconfigurerequest;
455 XWindowChanges wc;
456
457 /* TODO -- consider Xinerama if necessary when centering */
458 if((c = getclient(ev->window))) {
459 if(ev->value_mask & CWBorderWidth)
460 c->border = ev->border_width;
461 if(c->isfixed || c->isfloating || (floating == lt->arrange)) {
462 if(ev->value_mask & CWX)
463 c->x = sx + ev->x;
464 if(ev->value_mask & CWY)
465 c->y = sy + ev->y;
466 if(ev->value_mask & CWWidth)
467 c->w = ev->width;
468 if(ev->value_mask & CWHeight)
469 c->h = ev->height;
470 if((c->x - sx + c->w) > sw && c->isfloating)
471 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
472 if((c->y - sy + c->h) > sh && c->isfloating)
473 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
474 if((ev->value_mask & (CWX|CWY))
475 && !(ev->value_mask & (CWWidth|CWHeight)))
476 configure(c);
477 if(isvisible(c))
478 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
479 }
480 else
481 configure(c);
482 }
483 else {
484 wc.x = ev->x;
485 wc.y = ev->y;
486 wc.width = ev->width;
487 wc.height = ev->height;
488 wc.border_width = ev->border_width;
489 wc.sibling = ev->above;
490 wc.stack_mode = ev->detail;
491 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
492 }
493 XSync(dpy, False);
494 }
495
496 Bool
497 conflicts(Client *c, unsigned int tidx) {
498 unsigned int i;
499
500 for(i = 0; i < LENGTH(tags); i++)
501 if(c->tags[i])
502 return True; /* conflict */
503 return False;
504 }
505
506 void
507 destroynotify(XEvent *e) {
508 Client *c;
509 XDestroyWindowEvent *ev = &e->xdestroywindow;
510
511 if((c = getclient(ev->window)))
512 unmanage(c);
513 }
514
515 void
516 detach(Client *c) {
517 if(c->prev)
518 c->prev->next = c->next;
519 if(c->next)
520 c->next->prev = c->prev;
521 if(c == clients)
522 clients = c->next;
523 c->next = c->prev = NULL;
524 }
525
526 void
527 detachstack(Client *c) {
528 Client **tc;
529
530 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
531 *tc = c->snext;
532 }
533
534 void
535 drawbar(void) {
536 int i, x;
537 Client *c;
538
539 dc.x = 0;
540 for(c = stack; c && !isvisible(c); c = c->snext);
541 for(i = 0; i < LENGTH(tags); i++) {
542 dc.w = textw(tags[i]);
543 if(seltags[i]) {
544 drawtext(tags[i], dc.sel, isurgent(i));
545 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
546 }
547 else {
548 drawtext(tags[i], dc.norm, isurgent(i));
549 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
550 }
551 dc.x += dc.w;
552 }
553 dc.w = blw;
554 drawtext(lt->symbol, dc.norm, False);
555 x = dc.x + dc.w;
556 dc.w = textw(stext);
557 dc.x = sw - dc.w;
558 if(dc.x < x) {
559 dc.x = x;
560 dc.w = sw - x;
561 }
562 drawtext(stext, dc.norm, False);
563 if((dc.w = dc.x - x) > bh) {
564 dc.x = x;
565 if(c) {
566 drawtext(c->name, dc.sel, False);
567 drawsquare(False, c->isfloating, False, dc.sel);
568 }
569 else
570 drawtext(NULL, dc.norm, False);
571 }
572 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
573 XSync(dpy, False);
574 }
575
576 void
577 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
578 int x;
579 XGCValues gcv;
580 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
581
582 gcv.foreground = col[invert ? ColBG : ColFG];
583 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
584 x = (dc.font.ascent + dc.font.descent + 2) / 4;
585 r.x = dc.x + 1;
586 r.y = dc.y + 1;
587 if(filled) {
588 r.width = r.height = x + 1;
589 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
590 }
591 else if(empty) {
592 r.width = r.height = x;
593 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
594 }
595 }
596
597 void
598 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
599 int x, y, w, h;
600 unsigned int len, olen;
601 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
602
603 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
604 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
605 if(!text)
606 return;
607 w = 0;
608 olen = len = strlen(text);
609 if(len >= sizeof buf)
610 len = sizeof buf - 1;
611 memcpy(buf, text, len);
612 buf[len] = 0;
613 h = dc.font.ascent + dc.font.descent;
614 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
615 x = dc.x + (h / 2);
616 /* shorten text if necessary */
617 while(len && (w = textnw(buf, len)) > dc.w - h)
618 buf[--len] = 0;
619 if(len < olen) {
620 if(len > 1)
621 buf[len - 1] = '.';
622 if(len > 2)
623 buf[len - 2] = '.';
624 if(len > 3)
625 buf[len - 3] = '.';
626 }
627 if(w > dc.w)
628 return; /* too long */
629 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
630 if(dc.font.set)
631 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
632 else
633 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
634 }
635
636 void *
637 emallocz(unsigned int size) {
638 void *res = calloc(1, size);
639
640 if(!res)
641 eprint("fatal: could not malloc() %u bytes\n", size);
642 return res;
643 }
644
645 void
646 enternotify(XEvent *e) {
647 Client *c;
648 XCrossingEvent *ev = &e->xcrossing;
649
650 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
651 return;
652 if((c = getclient(ev->window)))
653 focus(c);
654 else
655 focus(NULL);
656 }
657
658 void
659 eprint(const char *errstr, ...) {
660 va_list ap;
661
662 va_start(ap, errstr);
663 vfprintf(stderr, errstr, ap);
664 va_end(ap);
665 exit(EXIT_FAILURE);
666 }
667
668 void
669 expose(XEvent *e) {
670 XExposeEvent *ev = &e->xexpose;
671
672 if(ev->count == 0 && (ev->window == barwin))
673 drawbar();
674 }
675
676 void
677 floating(void) { /* default floating layout */
678 Client *c;
679
680 domwfact = dozoom = False;
681 for(c = clients; c; c = c->next)
682 if(isvisible(c))
683 resize(c, c->x, c->y, c->w, c->h, True);
684 }
685
686 void
687 focus(Client *c) {
688 if(!c || (c && !isvisible(c)))
689 for(c = stack; c && !isvisible(c); c = c->snext);
690 if(sel && sel != c) {
691 grabbuttons(sel, False);
692 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
693 }
694 if(c) {
695 detachstack(c);
696 attachstack(c);
697 grabbuttons(c, True);
698 }
699 sel = c;
700 if(c) {
701 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
702 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
703 }
704 else
705 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
706 drawbar();
707 }
708
709 void
710 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
711 XFocusChangeEvent *ev = &e->xfocus;
712
713 if(sel && ev->window != sel->win)
714 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
715 }
716
717 void
718 focusnext(const char *arg) {
719 Client *c;
720
721 if(!sel)
722 return;
723 for(c = sel->next; c && !isvisible(c); c = c->next);
724 if(!c)
725 for(c = clients; c && !isvisible(c); c = c->next);
726 if(c) {
727 focus(c);
728 restack();
729 }
730 }
731
732 void
733 focusprev(const char *arg) {
734 Client *c;
735
736 if(!sel)
737 return;
738 for(c = sel->prev; c && !isvisible(c); c = c->prev);
739 if(!c) {
740 for(c = clients; c && c->next; c = c->next);
741 for(; c && !isvisible(c); c = c->prev);
742 }
743 if(c) {
744 focus(c);
745 restack();
746 }
747 }
748
749 Client *
750 getclient(Window w) {
751 Client *c;
752
753 for(c = clients; c && c->win != w; c = c->next);
754 return c;
755 }
756
757 unsigned long
758 getcolor(const char *colstr) {
759 Colormap cmap = DefaultColormap(dpy, screen);
760 XColor color;
761
762 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
763 eprint("error, cannot allocate color '%s'\n", colstr);
764 return color.pixel;
765 }
766
767 long
768 getstate(Window w) {
769 int format, status;
770 long result = -1;
771 unsigned char *p = NULL;
772 unsigned long n, extra;
773 Atom real;
774
775 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
776 &real, &format, &n, &extra, (unsigned char **)&p);
777 if(status != Success)
778 return -1;
779 if(n != 0)
780 result = *p;
781 XFree(p);
782 return result;
783 }
784
785 Bool
786 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
787 char **list = NULL;
788 int n;
789 XTextProperty name;
790
791 if(!text || size == 0)
792 return False;
793 text[0] = '\0';
794 XGetTextProperty(dpy, w, &name, atom);
795 if(!name.nitems)
796 return False;
797 if(name.encoding == XA_STRING)
798 strncpy(text, (char *)name.value, size - 1);
799 else {
800 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
801 && n > 0 && *list) {
802 strncpy(text, *list, size - 1);
803 XFreeStringList(list);
804 }
805 }
806 text[size - 1] = '\0';
807 XFree(name.value);
808 return True;
809 }
810
811 void
812 grabbuttons(Client *c, Bool focused) {
813 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
814
815 if(focused) {
816 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
817 GrabModeAsync, GrabModeSync, None, None);
818 XGrabButton(dpy, Button1, MODKEY|LockMask, c->win, False, BUTTONMASK,
819 GrabModeAsync, GrabModeSync, None, None);
820 XGrabButton(dpy, Button1, MODKEY|numlockmask, c->win, False, BUTTONMASK,
821 GrabModeAsync, GrabModeSync, None, None);
822 XGrabButton(dpy, Button1, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
823 GrabModeAsync, GrabModeSync, None, None);
824
825 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
826 GrabModeAsync, GrabModeSync, None, None);
827 XGrabButton(dpy, Button2, MODKEY|LockMask, c->win, False, BUTTONMASK,
828 GrabModeAsync, GrabModeSync, None, None);
829 XGrabButton(dpy, Button2, MODKEY|numlockmask, c->win, False, BUTTONMASK,
830 GrabModeAsync, GrabModeSync, None, None);
831 XGrabButton(dpy, Button2, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
832 GrabModeAsync, GrabModeSync, None, None);
833
834 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
835 GrabModeAsync, GrabModeSync, None, None);
836 XGrabButton(dpy, Button3, MODKEY|LockMask, c->win, False, BUTTONMASK,
837 GrabModeAsync, GrabModeSync, None, None);
838 XGrabButton(dpy, Button3, MODKEY|numlockmask, c->win, False, BUTTONMASK,
839 GrabModeAsync, GrabModeSync, None, None);
840 XGrabButton(dpy, Button3, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
841 GrabModeAsync, GrabModeSync, None, None);
842 }
843 else
844 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
845 GrabModeAsync, GrabModeSync, None, None);
846 }
847
848 void
849 grabkeys(void) {
850 unsigned int i, j;
851 KeyCode code;
852 XModifierKeymap *modmap;
853
854 /* init modifier map */
855 modmap = XGetModifierMapping(dpy);
856 for(i = 0; i < 8; i++)
857 for(j = 0; j < modmap->max_keypermod; j++) {
858 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
859 numlockmask = (1 << i);
860 }
861 XFreeModifiermap(modmap);
862
863 XUngrabKey(dpy, AnyKey, AnyModifier, root);
864 for(i = 0; i < LENGTH(keys); i++) {
865 code = XKeysymToKeycode(dpy, keys[i].keysym);
866 XGrabKey(dpy, code, keys[i].mod, root, True,
867 GrabModeAsync, GrabModeAsync);
868 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
869 GrabModeAsync, GrabModeAsync);
870 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
871 GrabModeAsync, GrabModeAsync);
872 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
873 GrabModeAsync, GrabModeAsync);
874 }
875 }
876
877 unsigned int
878 idxoftag(const char *t) {
879 unsigned int i;
880
881 for(i = 0; (i < LENGTH(tags)) && (tags[i] != t); i++);
882 return (i < LENGTH(tags)) ? i : 0;
883 }
884
885 void
886 initfont(const char *fontstr) {
887 char *def, **missing;
888 int i, n;
889
890 missing = NULL;
891 if(dc.font.set)
892 XFreeFontSet(dpy, dc.font.set);
893 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
894 if(missing) {
895 while(n--)
896 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
897 XFreeStringList(missing);
898 }
899 if(dc.font.set) {
900 XFontSetExtents *font_extents;
901 XFontStruct **xfonts;
902 char **font_names;
903 dc.font.ascent = dc.font.descent = 0;
904 font_extents = XExtentsOfFontSet(dc.font.set);
905 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
906 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
907 if(dc.font.ascent < (*xfonts)->ascent)
908 dc.font.ascent = (*xfonts)->ascent;
909 if(dc.font.descent < (*xfonts)->descent)
910 dc.font.descent = (*xfonts)->descent;
911 xfonts++;
912 }
913 }
914 else {
915 if(dc.font.xfont)
916 XFreeFont(dpy, dc.font.xfont);
917 dc.font.xfont = NULL;
918 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
919 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
920 eprint("error, cannot load font: '%s'\n", fontstr);
921 dc.font.ascent = dc.font.xfont->ascent;
922 dc.font.descent = dc.font.xfont->descent;
923 }
924 dc.font.height = dc.font.ascent + dc.font.descent;
925 }
926
927 Bool
928 isoccupied(unsigned int t) {
929 Client *c;
930
931 for(c = clients; c; c = c->next)
932 if(c->tags[t])
933 return True;
934 return False;
935 }
936
937 Bool
938 isprotodel(Client *c) {
939 int i, n;
940 Atom *protocols;
941 Bool ret = False;
942
943 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
944 for(i = 0; !ret && i < n; i++)
945 if(protocols[i] == wmatom[WMDelete])
946 ret = True;
947 XFree(protocols);
948 }
949 return ret;
950 }
951
952 Bool
953 isurgent(unsigned int t) {
954 Client *c;
955
956 for(c = clients; c; c = c->next)
957 if(c->isurgent && c->tags[t])
958 return True;
959 return False;
960 }
961
962 Bool
963 isvisible(Client *c) {
964 unsigned int i;
965
966 for(i = 0; i < LENGTH(tags); i++)
967 if(c->tags[i] && seltags[i])
968 return True;
969 return False;
970 }
971
972 void
973 keypress(XEvent *e) {
974 unsigned int i;
975 KeySym keysym;
976 XKeyEvent *ev;
977
978 ev = &e->xkey;
979 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
980 for(i = 0; i < LENGTH(keys); i++)
981 if(keysym == keys[i].keysym
982 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
983 {
984 if(keys[i].func)
985 keys[i].func(keys[i].arg);
986 }
987 }
988
989 void
990 killclient(const char *arg) {
991 XEvent ev;
992
993 if(!sel)
994 return;
995 if(isprotodel(sel)) {
996 ev.type = ClientMessage;
997 ev.xclient.window = sel->win;
998 ev.xclient.message_type = wmatom[WMProtocols];
999 ev.xclient.format = 32;
1000 ev.xclient.data.l[0] = wmatom[WMDelete];
1001 ev.xclient.data.l[1] = CurrentTime;
1002 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1003 }
1004 else
1005 XKillClient(dpy, sel->win);
1006 }
1007
1008 void
1009 manage(Window w, XWindowAttributes *wa) {
1010 Client *c, *t = NULL;
1011 Status rettrans;
1012 Window trans;
1013 XWindowChanges wc;
1014
1015 c = emallocz(sizeof(Client));
1016 c->tags = emallocz(TAGSZ);
1017 c->win = w;
1018
1019 c->x = wa->x + sx;
1020 c->y = wa->y + sy;
1021 c->w = wa->width;
1022 c->h = wa->height;
1023 c->oldborder = wa->border_width;
1024
1025 if(c->w == sw && c->h == sh) {
1026 c->x = sx;
1027 c->y = sy;
1028 c->border = wa->border_width;
1029 }
1030 else {
1031 if(c->x + c->w + 2 * c->border > wax + waw)
1032 c->x = wax + waw - c->w - 2 * c->border;
1033 if(c->y + c->h + 2 * c->border > way + wah)
1034 c->y = way + wah - c->h - 2 * c->border;
1035 if(c->x < wax)
1036 c->x = wax;
1037 if(c->y < way)
1038 c->y = way;
1039 c->border = BORDERPX;
1040 }
1041 wc.border_width = c->border;
1042 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1043 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1044 configure(c); /* propagates border_width, if size doesn't change */
1045 updatesizehints(c);
1046 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1047 grabbuttons(c, False);
1048 updatetitle(c);
1049 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1050 for(t = clients; t && t->win != trans; t = t->next);
1051 if(t)
1052 memcpy(c->tags, t->tags, TAGSZ);
1053 else
1054 applyrules(c);
1055 if(!c->isfloating)
1056 c->isfloating = (rettrans == Success) || c->isfixed;
1057 attach(c);
1058 attachstack(c);
1059 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1060 ban(c);
1061 XMapWindow(dpy, c->win);
1062 setclientstate(c, NormalState);
1063 arrange();
1064 }
1065
1066 void
1067 mappingnotify(XEvent *e) {
1068 XMappingEvent *ev = &e->xmapping;
1069
1070 XRefreshKeyboardMapping(ev);
1071 if(ev->request == MappingKeyboard)
1072 grabkeys();
1073 }
1074
1075 void
1076 maprequest(XEvent *e) {
1077 static XWindowAttributes wa;
1078 XMapRequestEvent *ev = &e->xmaprequest;
1079
1080 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1081 return;
1082 if(wa.override_redirect)
1083 return;
1084 if(!getclient(ev->window))
1085 manage(ev->window, &wa);
1086 }
1087
1088 void
1089 maximise(void) {
1090 Client *c;
1091
1092 domwfact = dozoom = False;
1093 for(c = nexttiled(clients); c; c = nexttiled(c->next))
1094 resize(c, wax, way, waw - 2 * c->border, wah - 2 * c->border, RESIZEHINTS);
1095 }
1096
1097 void
1098 movemouse(Client *c) {
1099 int x1, y1, ocx, ocy, di, nx, ny;
1100 unsigned int dui;
1101 Window dummy;
1102 XEvent ev;
1103
1104 ocx = nx = c->x;
1105 ocy = ny = c->y;
1106 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1107 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1108 return;
1109 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1110 for(;;) {
1111 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1112 switch (ev.type) {
1113 case ButtonRelease:
1114 XUngrabPointer(dpy, CurrentTime);
1115 return;
1116 case ConfigureRequest:
1117 case Expose:
1118 case MapRequest:
1119 handler[ev.type](&ev);
1120 break;
1121 case MotionNotify:
1122 XSync(dpy, False);
1123 nx = ocx + (ev.xmotion.x - x1);
1124 ny = ocy + (ev.xmotion.y - y1);
1125 if(abs(wax - nx) < SNAP)
1126 nx = wax;
1127 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1128 nx = wax + waw - c->w - 2 * c->border;
1129 if(abs(way - ny) < SNAP)
1130 ny = way;
1131 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1132 ny = way + wah - c->h - 2 * c->border;
1133 if(!c->isfloating && (lt->arrange != floating) && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1134 togglefloating(NULL);
1135 if((lt->arrange == floating) || c->isfloating)
1136 resize(c, nx, ny, c->w, c->h, False);
1137 break;
1138 }
1139 }
1140 }
1141
1142 Client *
1143 nexttiled(Client *c) {
1144 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1145 return c;
1146 }
1147
1148 void
1149 propertynotify(XEvent *e) {
1150 Client *c;
1151 Window trans;
1152 XPropertyEvent *ev = &e->xproperty;
1153
1154 if(ev->state == PropertyDelete)
1155 return; /* ignore */
1156 if((c = getclient(ev->window))) {
1157 switch (ev->atom) {
1158 default: break;
1159 case XA_WM_TRANSIENT_FOR:
1160 XGetTransientForHint(dpy, c->win, &trans);
1161 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1162 arrange();
1163 break;
1164 case XA_WM_NORMAL_HINTS:
1165 updatesizehints(c);
1166 break;
1167 case XA_WM_HINTS:
1168 updatewmhints(c);
1169 drawbar();
1170 break;
1171 }
1172 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1173 updatetitle(c);
1174 if(c == sel)
1175 drawbar();
1176 }
1177 }
1178 }
1179
1180 void
1181 quit(const char *arg) {
1182 readin = running = False;
1183 }
1184
1185 void
1186 reapply(const char *arg) {
1187 static Bool zerotags[LENGTH(tags)] = { 0 };
1188 Client *c;
1189
1190 for(c = clients; c; c = c->next) {
1191 memcpy(c->tags, zerotags, sizeof zerotags);
1192 applyrules(c);
1193 }
1194 arrange();
1195 }
1196
1197 void
1198 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1199 XWindowChanges wc;
1200
1201 if(sizehints) {
1202 /* set minimum possible */
1203 if (w < 1)
1204 w = 1;
1205 if (h < 1)
1206 h = 1;
1207
1208 /* temporarily remove base dimensions */
1209 w -= c->basew;
1210 h -= c->baseh;
1211
1212 /* adjust for aspect limits */
1213 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1214 if (w * c->maxay > h * c->maxax)
1215 w = h * c->maxax / c->maxay;
1216 else if (w * c->minay < h * c->minax)
1217 h = w * c->minay / c->minax;
1218 }
1219
1220 /* adjust for increment value */
1221 if(c->incw)
1222 w -= w % c->incw;
1223 if(c->inch)
1224 h -= h % c->inch;
1225
1226 /* restore base dimensions */
1227 w += c->basew;
1228 h += c->baseh;
1229
1230 if(c->minw > 0 && w < c->minw)
1231 w = c->minw;
1232 if(c->minh > 0 && h < c->minh)
1233 h = c->minh;
1234 if(c->maxw > 0 && w > c->maxw)
1235 w = c->maxw;
1236 if(c->maxh > 0 && h > c->maxh)
1237 h = c->maxh;
1238 }
1239 if(w <= 0 || h <= 0)
1240 return;
1241 if(x > sx + sw)
1242 x = sw - w - 2 * c->border;
1243 if(y > sy + sh)
1244 y = sh - h - 2 * c->border;
1245 if(x + w + 2 * c->border < sx)
1246 x = sx;
1247 if(y + h + 2 * c->border < sy)
1248 y = sy;
1249 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1250 c->x = wc.x = x;
1251 c->y = wc.y = y;
1252 c->w = wc.width = w;
1253 c->h = wc.height = h;
1254 wc.border_width = c->border;
1255 XConfigureWindow(dpy, c->win,
1256 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1257 configure(c);
1258 XSync(dpy, False);
1259 }
1260 }
1261
1262 void
1263 resizemouse(Client *c) {
1264 int ocx, ocy;
1265 int nw, nh;
1266 XEvent ev;
1267
1268 ocx = c->x;
1269 ocy = c->y;
1270 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1271 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1272 return;
1273 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1274 for(;;) {
1275 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1276 switch(ev.type) {
1277 case ButtonRelease:
1278 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1279 c->w + c->border - 1, c->h + c->border - 1);
1280 XUngrabPointer(dpy, CurrentTime);
1281 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1282 return;
1283 case ConfigureRequest:
1284 case Expose:
1285 case MapRequest:
1286 handler[ev.type](&ev);
1287 break;
1288 case MotionNotify:
1289 XSync(dpy, False);
1290 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1291 nw = 1;
1292 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1293 nh = 1;
1294 if(!c->isfloating && (lt->arrange != floating) && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1295 togglefloating(NULL);
1296 if((lt->arrange == floating) || c->isfloating)
1297 resize(c, c->x, c->y, nw, nh, True);
1298 break;
1299 }
1300 }
1301 }
1302
1303 void
1304 restack(void) {
1305 Client *c;
1306 XEvent ev;
1307 XWindowChanges wc;
1308
1309 drawbar();
1310 if(!sel)
1311 return;
1312 if(sel->isfloating || (lt->arrange == floating))
1313 XRaiseWindow(dpy, sel->win);
1314 if(lt->arrange != floating) {
1315 wc.stack_mode = Below;
1316 wc.sibling = barwin;
1317 if(!sel->isfloating) {
1318 XConfigureWindow(dpy, sel->win, CWSibling|CWStackMode, &wc);
1319 wc.sibling = sel->win;
1320 }
1321 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1322 if(c == sel)
1323 continue;
1324 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1325 wc.sibling = c->win;
1326 }
1327 }
1328 XSync(dpy, False);
1329 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1330 }
1331
1332 void
1333 run(void) {
1334 char *p;
1335 char sbuf[sizeof stext];
1336 fd_set rd;
1337 int r, xfd;
1338 unsigned int len, offset;
1339 XEvent ev;
1340
1341 /* main event loop, also reads status text from stdin */
1342 XSync(dpy, False);
1343 xfd = ConnectionNumber(dpy);
1344 readin = True;
1345 offset = 0;
1346 len = sizeof stext - 1;
1347 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1348 while(running) {
1349 FD_ZERO(&rd);
1350 if(readin)
1351 FD_SET(STDIN_FILENO, &rd);
1352 FD_SET(xfd, &rd);
1353 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1354 if(errno == EINTR)
1355 continue;
1356 eprint("select failed\n");
1357 }
1358 if(FD_ISSET(STDIN_FILENO, &rd)) {
1359 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1360 case -1:
1361 strncpy(stext, strerror(errno), len);
1362 readin = False;
1363 break;
1364 case 0:
1365 strncpy(stext, "EOF", 4);
1366 readin = False;
1367 break;
1368 default:
1369 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1370 if(*p == '\n' || *p == '\0') {
1371 *p = '\0';
1372 strncpy(stext, sbuf, len);
1373 p += r - 1; /* p is sbuf + offset + r - 1 */
1374 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1375 offset = r;
1376 if(r)
1377 memmove(sbuf, p - r + 1, r);
1378 break;
1379 }
1380 break;
1381 }
1382 drawbar();
1383 }
1384 while(XPending(dpy)) {
1385 XNextEvent(dpy, &ev);
1386 if(handler[ev.type])
1387 (handler[ev.type])(&ev); /* call handler */
1388 }
1389 }
1390 }
1391
1392 void
1393 scan(void) {
1394 unsigned int i, num;
1395 Window *wins, d1, d2;
1396 XWindowAttributes wa;
1397
1398 wins = NULL;
1399 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1400 for(i = 0; i < num; i++) {
1401 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1402 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1403 continue;
1404 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1405 manage(wins[i], &wa);
1406 }
1407 for(i = 0; i < num; i++) { /* now the transients */
1408 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1409 continue;
1410 if(XGetTransientForHint(dpy, wins[i], &d1)
1411 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1412 manage(wins[i], &wa);
1413 }
1414 }
1415 if(wins)
1416 XFree(wins);
1417 }
1418
1419 void
1420 setclientstate(Client *c, long state) {
1421 long data[] = {state, None};
1422
1423 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1424 PropModeReplace, (unsigned char *)data, 2);
1425 }
1426
1427 void
1428 setlayout(const char *arg) {
1429 unsigned int i;
1430
1431 if(!arg) {
1432 lt++;
1433 if(lt == &layouts[LENGTH(layouts)])
1434 lt = &layouts[0];
1435 }
1436 else {
1437 for(i = 0; i < LENGTH(layouts); i++)
1438 if(!strcmp(arg, layouts[i].symbol))
1439 break;
1440 if(i == LENGTH(layouts))
1441 return;
1442 lt = &layouts[i];
1443 }
1444 if(sel)
1445 arrange();
1446 else
1447 drawbar();
1448 }
1449
1450 void
1451 setmwfact(const char *arg) {
1452 double delta;
1453
1454 if(!domwfact)
1455 return;
1456 /* arg handling, manipulate mwfact */
1457 if(arg == NULL)
1458 mwfact = MWFACT;
1459 else if(sscanf(arg, "%lf", &delta) == 1) {
1460 if(arg[0] == '+' || arg[0] == '-')
1461 mwfact += delta;
1462 else
1463 mwfact = delta;
1464 if(mwfact < 0.1)
1465 mwfact = 0.1;
1466 else if(mwfact > 0.9)
1467 mwfact = 0.9;
1468 }
1469 arrange();
1470 }
1471
1472 void
1473 setup(void) {
1474 int screens = 1;
1475 unsigned int i;
1476 XSetWindowAttributes wa;
1477 //#ifdef XINERAMA
1478 XineramaScreenInfo *info;
1479 //#endif
1480
1481 /* init screen */
1482 screen = DefaultScreen(dpy);
1483 root = RootWindow(dpy, screen);
1484 sx = 0;
1485 sy = 0;
1486 sw = DisplayWidth(dpy, screen);
1487 sh = DisplayHeight(dpy, screen);
1488 if(XineramaIsActive(dpy)) {
1489 if((info = XineramaQueryScreens(dpy, &screens))) {
1490 sx = info[0].x_org;
1491 sy = info[0].y_org;
1492 sw = info[0].width;
1493 sh = info[0].height;
1494 }
1495 }
1496
1497 /* init atoms */
1498 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1499 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1500 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1501 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1502 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1503 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1504
1505 /* init cursors */
1506 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1507 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1508 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1509
1510 ncols = 2;
1511 #if 0
1512 if(XineramaIsActive(dpy)) {
1513 if((info = XineramaQueryScreens(dpy, &screens))) {
1514 if(screens >= 1) {
1515 sx = info[0].x_org;
1516 sy = info[0].y_org;
1517 sw = info[0].width;
1518 sh = info[0].height;
1519 }
1520 else {
1521 ncols = screens;
1522 cols = emallocz(ncols * sizeof(Column));
1523 for(i = 0; i < ncols; i++) {
1524 cols[i].x = info[i].x_org;
1525 cols[i].y = info[i].y_org;
1526 cols[i].w = info[i].width;
1527 cols[i].h = info[i].height;
1528 }
1529 }
1530 XFree(info);
1531 }
1532 }
1533 else
1534 {
1535 cols = emallocz(ncols * sizeof(Column));
1536 cols[0].x = sx;
1537 cols[0].y = sy;
1538 }
1539 #endif
1540 /* init appearance */
1541 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1542 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1543 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1544 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1545 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1546 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1547 initfont(FONT);
1548 dc.h = bh = dc.font.height + 2;
1549 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1550 dc.gc = XCreateGC(dpy, root, 0, 0);
1551 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1552 if(!dc.font.set)
1553 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1554
1555 /* init tags */
1556 seltags = emallocz(TAGSZ);
1557 prevtags = emallocz(TAGSZ);
1558 seltags[0] = prevtags[0] = True;
1559
1560 /* init layouts */
1561 mwfact = MWFACT;
1562 lt = &layouts[0];
1563
1564 /* TODO: Xinerama hints ? */
1565 /* init bar */
1566 for(blw = i = 0; i < LENGTH(layouts); i++) {
1567 i = textw(layouts[i].symbol);
1568 if(i > blw)
1569 blw = i;
1570 }
1571
1572 bpos = BARPOS;
1573 wa.override_redirect = 1;
1574 wa.background_pixmap = ParentRelative;
1575 wa.event_mask = ButtonPressMask|ExposureMask;
1576
1577 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0, DefaultDepth(dpy, screen),
1578 CopyFromParent, DefaultVisual(dpy, screen),
1579 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1580 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1581 updatebarpos();
1582 XMapRaised(dpy, barwin);
1583 strcpy(stext, "dwm-"VERSION);
1584 drawbar();
1585
1586 /* EWMH support per view */
1587 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1588 PropModeReplace, (unsigned char *) netatom, NetLast);
1589
1590 /* select for events */
1591 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1592 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1593 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1594 XSelectInput(dpy, root, wa.event_mask);
1595
1596
1597 /* grab keys */
1598 grabkeys();
1599 }
1600
1601 void
1602 spawn(const char *arg) {
1603 static char *shell = NULL;
1604
1605 if(!shell && !(shell = getenv("SHELL")))
1606 shell = "/bin/sh";
1607 if(!arg)
1608 return;
1609 /* The double-fork construct avoids zombie processes and keeps the code
1610 * clean from stupid signal handlers. */
1611 if(fork() == 0) {
1612 if(fork() == 0) {
1613 if(dpy)
1614 close(ConnectionNumber(dpy));
1615 setsid();
1616 execl(shell, shell, "-c", arg, (char *)NULL);
1617 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1618 perror(" failed");
1619 }
1620 exit(0);
1621 }
1622 wait(0);
1623 }
1624
1625 void
1626 tag(const char *arg) {
1627 unsigned int i;
1628
1629 if(!sel)
1630 return;
1631 for(i = 0; i < LENGTH(tags); i++)
1632 sel->tags[i] = (NULL == arg);
1633 sel->tags[idxoftag(arg)] = True;
1634 arrange();
1635 }
1636
1637 unsigned int
1638 textnw(const char *text, unsigned int len) {
1639 XRectangle r;
1640
1641 if(dc.font.set) {
1642 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1643 return r.width;
1644 }
1645 return XTextWidth(dc.font.xfont, text, len);
1646 }
1647
1648 unsigned int
1649 textw(const char *text) {
1650 return textnw(text, strlen(text)) + dc.font.height;
1651 }
1652
1653 void
1654 tile(void) {
1655 unsigned int i, n, nx, ny, nw, nh, mw, th;
1656 Client *c, *mc;
1657
1658 domwfact = dozoom = True;
1659 nx = wax;
1660 ny = way;
1661 nw = 0;
1662 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1663 n++;
1664
1665 /* window geoms */
1666 mw = (n == 1) ? waw : mwfact * waw;
1667 th = (n > 1) ? wah / (n - 1) : 0;
1668 if(n > 1 && th < bh)
1669 th = wah;
1670
1671 for(i = 0, c = mc = nexttiled(clients); c; c = nexttiled(c->next)) {
1672 if(i == 0) { /* master */
1673 nw = mw - 2 * c->border;
1674 nh = wah - 2 * c->border;
1675 }
1676 else { /* tile window */
1677 if(i == 1) {
1678 ny = way;
1679 nx += mc->w + 2 * mc->border;
1680 nw = waw - mw - 2 * c->border;
1681 }
1682 if(i + 1 == n) /* remainder */
1683 nh = (way + wah) - ny - 2 * c->border;
1684 else
1685 nh = th - 2 * c->border;
1686 }
1687 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1688 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1689 /* client doesn't accept size constraints */
1690 resize(c, nx, ny, nw, nh, False);
1691 if(n > 1 && th != wah)
1692 ny = c->y + c->h + 2 * c->border;
1693 i++;
1694 }
1695 }
1696
1697 void
1698 togglebar(const char *arg) {
1699 if(bpos == BarOff)
1700 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1701 else
1702 bpos = BarOff;
1703 updatebarpos();
1704 arrange();
1705 }
1706
1707 void
1708 togglefloating(const char *arg) {
1709 if(!sel)
1710 return;
1711 sel->isfloating = !sel->isfloating;
1712 if(sel->isfloating)
1713 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1714 arrange();
1715 }
1716
1717 void
1718 toggletag(const char *arg) {
1719 unsigned int i, j;
1720
1721 if(!sel)
1722 return;
1723 i = idxoftag(arg);
1724 if(conflicts(sel, i))
1725 return;
1726 sel->tags[i] = !sel->tags[i];
1727 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1728 if(j == LENGTH(tags))
1729 sel->tags[i] = True; /* at least one tag must be enabled */
1730 arrange();
1731 }
1732
1733 void
1734 toggleview(const char *arg) {
1735 unsigned int i, j;
1736
1737 i = idxoftag(arg);
1738 seltags[i] = !seltags[i];
1739 for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1740 if(j == LENGTH(tags))
1741 seltags[i] = True; /* at least one tag must be viewed */
1742 arrange();
1743 }
1744
1745 void
1746 unban(Client *c) {
1747 if(!c->isbanned)
1748 return;
1749 XMoveWindow(dpy, c->win, c->x, c->y);
1750 c->isbanned = False;
1751 }
1752
1753 void
1754 unmanage(Client *c) {
1755 XWindowChanges wc;
1756
1757 wc.border_width = c->oldborder;
1758 /* The server grab construct avoids race conditions. */
1759 XGrabServer(dpy);
1760 XSetErrorHandler(xerrordummy);
1761 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1762 detach(c);
1763 detachstack(c);
1764 if(sel == c)
1765 focus(NULL);
1766 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1767 setclientstate(c, WithdrawnState);
1768 free(c->tags);
1769 free(c);
1770 XSync(dpy, False);
1771 XSetErrorHandler(xerror);
1772 XUngrabServer(dpy);
1773 arrange();
1774 }
1775
1776 void
1777 unmapnotify(XEvent *e) {
1778 Client *c;
1779 XUnmapEvent *ev = &e->xunmap;
1780
1781 if((c = getclient(ev->window)))
1782 unmanage(c);
1783 }
1784
1785 void
1786 updatebarpos(void) {
1787 XEvent ev;
1788
1789 wax = sx;
1790 way = sy;
1791 wah = sh;
1792 waw = sw;
1793 switch(bpos) {
1794 default:
1795 wah -= bh;
1796 way += bh;
1797 XMoveWindow(dpy, barwin, sx, sy);
1798 break;
1799 case BarBot:
1800 wah -= bh;
1801 XMoveWindow(dpy, barwin, sx, sy + wah);
1802 break;
1803 case BarOff:
1804 XMoveWindow(dpy, barwin, sx, sy - bh);
1805 break;
1806 }
1807 XSync(dpy, False);
1808 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1809 }
1810
1811 void
1812 updatesizehints(Client *c) {
1813 long msize;
1814 XSizeHints size;
1815
1816 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1817 size.flags = PSize;
1818 c->flags = size.flags;
1819 if(c->flags & PBaseSize) {
1820 c->basew = size.base_width;
1821 c->baseh = size.base_height;
1822 }
1823 else if(c->flags & PMinSize) {
1824 c->basew = size.min_width;
1825 c->baseh = size.min_height;
1826 }
1827 else
1828 c->basew = c->baseh = 0;
1829 if(c->flags & PResizeInc) {
1830 c->incw = size.width_inc;
1831 c->inch = size.height_inc;
1832 }
1833 else
1834 c->incw = c->inch = 0;
1835 if(c->flags & PMaxSize) {
1836 c->maxw = size.max_width;
1837 c->maxh = size.max_height;
1838 }
1839 else
1840 c->maxw = c->maxh = 0;
1841 if(c->flags & PMinSize) {
1842 c->minw = size.min_width;
1843 c->minh = size.min_height;
1844 }
1845 else if(c->flags & PBaseSize) {
1846 c->minw = size.base_width;
1847 c->minh = size.base_height;
1848 }
1849 else
1850 c->minw = c->minh = 0;
1851 if(c->flags & PAspect) {
1852 c->minax = size.min_aspect.x;
1853 c->maxax = size.max_aspect.x;
1854 c->minay = size.min_aspect.y;
1855 c->maxay = size.max_aspect.y;
1856 }
1857 else
1858 c->minax = c->maxax = c->minay = c->maxay = 0;
1859 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1860 && c->maxw == c->minw && c->maxh == c->minh);
1861 }
1862
1863 void
1864 updatetitle(Client *c) {
1865 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1866 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1867 }
1868
1869 void
1870 updatewmhints(Client *c) {
1871 XWMHints *wmh;
1872
1873 if(c == sel)
1874 return;
1875 if((wmh = XGetWMHints(dpy, c->win))) {
1876 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1877 XFree(wmh);
1878 }
1879 }
1880
1881
1882 void
1883 view(const char *arg) {
1884 unsigned int i;
1885
1886 for(i = 0; i < LENGTH(tags); i++)
1887 tmp[i] = (NULL == arg);
1888 tmp[idxoftag(arg)] = True;
1889
1890 if(memcmp(seltags, tmp, TAGSZ) != 0) {
1891 memcpy(prevtags, seltags, TAGSZ);
1892 memcpy(seltags, tmp, TAGSZ);
1893 arrange();
1894 }
1895 }
1896
1897 void
1898 viewprevtag(const char *arg) {
1899
1900 memcpy(tmp, seltags, TAGSZ);
1901 memcpy(seltags, prevtags, TAGSZ);
1902 memcpy(prevtags, tmp, TAGSZ);
1903 arrange();
1904 }
1905
1906 /* There's no way to check accesses to destroyed windows, thus those cases are
1907 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1908 * default error handler, which may call exit. */
1909 int
1910 xerror(Display *dpy, XErrorEvent *ee) {
1911 if(ee->error_code == BadWindow
1912 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1913 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1914 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1915 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1916 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1917 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1918 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1919 return 0;
1920 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1921 ee->request_code, ee->error_code);
1922 return xerrorxlib(dpy, ee); /* may call exit */
1923 }
1924
1925 int
1926 xerrordummy(Display *dpy, XErrorEvent *ee) {
1927 return 0;
1928 }
1929
1930 /* Startup Error handler to check if another window manager
1931 * is already running. */
1932 int
1933 xerrorstart(Display *dpy, XErrorEvent *ee) {
1934 otherwm = True;
1935 return -1;
1936 }
1937
1938 void
1939 zoom(const char *arg) {
1940 Client *c = sel;
1941
1942 if(!sel || !dozoom || sel->isfloating)
1943 return;
1944 if(c == nexttiled(clients))
1945 if(!(c = nexttiled(c->next)))
1946 return;
1947 detach(c);
1948 attach(c);
1949 focus(c);
1950 arrange();
1951 }
1952
1953 int
1954 main(int argc, char *argv[]) {
1955 if(argc == 2 && !strcmp("-v", argv[1]))
1956 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1957 else if(argc != 1)
1958 eprint("usage: dwm [-v]\n");
1959
1960 setlocale(LC_CTYPE, "");
1961 if(!(dpy = XOpenDisplay(0)))
1962 eprint("dwm: cannot open display\n");
1963
1964 checkotherwm();
1965 setup();
1966 scan();
1967 run();
1968 cleanup();
1969
1970 XCloseDisplay(dpy);
1971 return 0;
1972 }