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