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some cleanup
[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains an array of Bools of the same size as the
20 * global tags array to indicate the tags of a client.
21 *
22 * Keys and tagging rules are organized as arrays and defined in config.h.
23 *
24 * To understand everything else, start reading main().
25 */
26 #include <errno.h>
27 #include <locale.h>
28 #include <stdarg.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33 #include <sys/select.h>
34 #include <sys/types.h>
35 #include <sys/wait.h>
36 #include <X11/cursorfont.h>
37 #include <X11/keysym.h>
38 #include <X11/Xatom.h>
39 #include <X11/Xlib.h>
40 #include <X11/Xproto.h>
41 #include <X11/Xutil.h>
42
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define LENGTH(x) (sizeof x / sizeof x[0])
47 #define MAXTAGLEN 16
48 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
49
50 /* enums */
51 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
52 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
53 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
54 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
55
56 /* typedefs */
57 typedef struct Client Client;
58 struct Client {
59 char name[256];
60 int x, y, w, h;
61 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
62 int minax, maxax, minay, maxay;
63 long flags;
64 unsigned int border, oldborder;
65 Bool isbanned, isfixed, isfloating, isurgent;
66 Bool *tags;
67 Client *next;
68 Client *prev;
69 Client *snext;
70 Window win;
71 };
72
73 typedef struct {
74 int x, y, w, h;
75 unsigned long norm[ColLast];
76 unsigned long sel[ColLast];
77 Drawable drawable;
78 GC gc;
79 struct {
80 int ascent;
81 int descent;
82 int height;
83 XFontSet set;
84 XFontStruct *xfont;
85 } font;
86 } DC; /* draw context */
87
88 typedef struct {
89 unsigned long mod;
90 KeySym keysym;
91 void (*func)(const char *arg);
92 const char *arg;
93 } Key;
94
95 typedef struct {
96 const char *symbol;
97 void (*arrange)(void);
98 Bool isfloating;
99 } Layout;
100
101 typedef struct {
102 const char *prop;
103 const char *tag;
104 Bool isfloating;
105 } Rule;
106
107 /* function declarations */
108 void applyrules(Client *c);
109 void arrange(void);
110 void attach(Client *c);
111 void attachstack(Client *c);
112 void ban(Client *c);
113 void buttonpress(XEvent *e);
114 void checkotherwm(void);
115 void cleanup(void);
116 void configure(Client *c);
117 void configurenotify(XEvent *e);
118 void configurerequest(XEvent *e);
119 void destroynotify(XEvent *e);
120 void detach(Client *c);
121 void detachstack(Client *c);
122 void drawbar(void);
123 void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
124 void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
125 void *emallocz(unsigned int size);
126 void enternotify(XEvent *e);
127 void eprint(const char *errstr, ...);
128 void expose(XEvent *e);
129 void floating(void); /* default floating layout */
130 void focus(Client *c);
131 void focusin(XEvent *e);
132 void focusnext(const char *arg);
133 void focusprev(const char *arg);
134 Client *getclient(Window w);
135 unsigned long getcolor(const char *colstr);
136 long getstate(Window w);
137 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
138 void grabbuttons(Client *c, Bool focused);
139 void grabkeys(void);
140 unsigned int idxoftag(const char *t);
141 void initfont(const char *fontstr);
142 Bool isoccupied(unsigned int t);
143 Bool isprotodel(Client *c);
144 Bool isurgent(unsigned int t);
145 Bool isvisible(Client *c);
146 void keypress(XEvent *e);
147 void killclient(const char *arg);
148 void manage(Window w, XWindowAttributes *wa);
149 void mappingnotify(XEvent *e);
150 void maprequest(XEvent *e);
151 void monocle(void);
152 void movemouse(Client *c);
153 Client *nexttiled(Client *c);
154 void propertynotify(XEvent *e);
155 void quit(const char *arg);
156 void reapply(const char *arg);
157 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
158 void resizemouse(Client *c);
159 void restack(void);
160 void run(void);
161 void scan(void);
162 void setclientstate(Client *c, long state);
163 void setdefaultgeoms(void);
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 tileh(void);
171 void tilehstack(unsigned int n);
172 unsigned int tilemaster(void);
173 void tilev(void);
174 void tilevstack(unsigned int n);
175 void togglefloating(const char *arg);
176 void toggletag(const char *arg);
177 void toggleview(const char *arg);
178 void unban(Client *c);
179 void unmanage(Client *c);
180 void unmapnotify(XEvent *e);
181 void updatebarpos(void);
182 void updatesizehints(Client *c);
183 void updatetitle(Client *c);
184 void updatewmhints(Client *c);
185 void view(const char *arg);
186 void viewprevtag(const char *arg); /* views previous selected tags */
187 int xerror(Display *dpy, XErrorEvent *ee);
188 int xerrordummy(Display *dpy, XErrorEvent *ee);
189 int xerrorstart(Display *dpy, XErrorEvent *ee);
190 void zoom(const char *arg);
191
192 /* variables */
193 char stext[256], buf[256];
194 int screen, sx, sy, sw, sh;
195 int (*xerrorxlib)(Display *, XErrorEvent *);
196 int bx, by, bw, bh, blw, mx, my, mw, mh, mox, moy, mow, moh, tx, ty, tw, th, wx, wy, ww, wh;
197 unsigned int numlockmask = 0;
198 void (*handler[LASTEvent]) (XEvent *) = {
199 [ButtonPress] = buttonpress,
200 [ConfigureRequest] = configurerequest,
201 [ConfigureNotify] = configurenotify,
202 [DestroyNotify] = destroynotify,
203 [EnterNotify] = enternotify,
204 [Expose] = expose,
205 [FocusIn] = focusin,
206 [KeyPress] = keypress,
207 [MappingNotify] = mappingnotify,
208 [MapRequest] = maprequest,
209 [PropertyNotify] = propertynotify,
210 [UnmapNotify] = unmapnotify
211 };
212 Atom wmatom[WMLast], netatom[NetLast];
213 Bool otherwm, readin;
214 Bool running = True;
215 Bool *prevtags;
216 Bool *seltags;
217 Client *clients = NULL;
218 Client *sel = NULL;
219 Client *stack = NULL;
220 Cursor cursor[CurLast];
221 Display *dpy;
222 DC dc = {0};
223 Layout *lt = NULL;
224 Window root, barwin;
225 void (*setgeoms)(void) = setdefaultgeoms;
226
227 /* configuration, allows nested code to access above variables */
228 #include "config.h"
229 #define TAGSZ (LENGTH(tags) * sizeof(Bool))
230 static Bool tmp[LENGTH(tags)];
231
232 /* function implementations */
233
234 void
235 applyrules(Client *c) {
236 unsigned int i;
237 Bool matched = False;
238 Rule *r;
239 XClassHint ch = { 0 };
240
241 /* rule matching */
242 XGetClassHint(dpy, c->win, &ch);
243 for(i = 0; i < LENGTH(rules); i++) {
244 r = &rules[i];
245 if(strstr(c->name, r->prop)
246 || (ch.res_class && strstr(ch.res_class, r->prop))
247 || (ch.res_name && strstr(ch.res_name, r->prop)))
248 {
249 c->isfloating = r->isfloating;
250 if(r->tag) {
251 c->tags[idxoftag(r->tag)] = True;
252 matched = True;
253 }
254 }
255 }
256 if(ch.res_class)
257 XFree(ch.res_class);
258 if(ch.res_name)
259 XFree(ch.res_name);
260 if(!matched)
261 memcpy(c->tags, seltags, TAGSZ);
262 }
263
264 void
265 arrange(void) {
266 Client *c;
267
268 for(c = clients; c; c = c->next)
269 if(isvisible(c))
270 unban(c);
271 else
272 ban(c);
273
274 focus(NULL);
275 lt->arrange();
276 restack();
277 }
278
279 void
280 attach(Client *c) {
281 if(clients)
282 clients->prev = c;
283 c->next = clients;
284 clients = c;
285 }
286
287 void
288 attachstack(Client *c) {
289 c->snext = stack;
290 stack = c;
291 }
292
293 void
294 ban(Client *c) {
295 if(c->isbanned)
296 return;
297 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
298 c->isbanned = True;
299 }
300
301 void
302 buttonpress(XEvent *e) {
303 unsigned int i, x;
304 Client *c;
305 XButtonPressedEvent *ev = &e->xbutton;
306
307 if(ev->window == barwin) {
308 x = 0;
309 for(i = 0; i < LENGTH(tags); i++) {
310 x += textw(tags[i]);
311 if(ev->x < x) {
312 if(ev->button == Button1) {
313 if(ev->state & MODKEY)
314 tag(tags[i]);
315 else
316 view(tags[i]);
317 }
318 else if(ev->button == Button3) {
319 if(ev->state & MODKEY)
320 toggletag(tags[i]);
321 else
322 toggleview(tags[i]);
323 }
324 return;
325 }
326 }
327 }
328 else if((c = getclient(ev->window))) {
329 focus(c);
330 if(CLEANMASK(ev->state) != MODKEY)
331 return;
332 if(ev->button == Button1) {
333 restack();
334 movemouse(c);
335 }
336 else if(ev->button == Button2) {
337 if((floating != lt->arrange) && c->isfloating)
338 togglefloating(NULL);
339 else
340 zoom(NULL);
341 }
342 else if(ev->button == Button3 && !c->isfixed) {
343 restack();
344 resizemouse(c);
345 }
346 }
347 }
348
349 void
350 checkotherwm(void) {
351 otherwm = False;
352 XSetErrorHandler(xerrorstart);
353
354 /* this causes an error if some other window manager is running */
355 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
356 XSync(dpy, False);
357 if(otherwm)
358 eprint("dwm: another window manager is already running\n");
359 XSync(dpy, False);
360 XSetErrorHandler(NULL);
361 xerrorxlib = XSetErrorHandler(xerror);
362 XSync(dpy, False);
363 }
364
365 void
366 cleanup(void) {
367 close(STDIN_FILENO);
368 while(stack) {
369 unban(stack);
370 unmanage(stack);
371 }
372 if(dc.font.set)
373 XFreeFontSet(dpy, dc.font.set);
374 else
375 XFreeFont(dpy, dc.font.xfont);
376 XUngrabKey(dpy, AnyKey, AnyModifier, root);
377 XFreePixmap(dpy, dc.drawable);
378 XFreeGC(dpy, dc.gc);
379 XFreeCursor(dpy, cursor[CurNormal]);
380 XFreeCursor(dpy, cursor[CurResize]);
381 XFreeCursor(dpy, cursor[CurMove]);
382 XDestroyWindow(dpy, barwin);
383 XSync(dpy, False);
384 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
385 }
386
387 void
388 configure(Client *c) {
389 XConfigureEvent ce;
390
391 ce.type = ConfigureNotify;
392 ce.display = dpy;
393 ce.event = c->win;
394 ce.window = c->win;
395 ce.x = c->x;
396 ce.y = c->y;
397 ce.width = c->w;
398 ce.height = c->h;
399 ce.border_width = c->border;
400 ce.above = None;
401 ce.override_redirect = False;
402 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
403 }
404
405 void
406 configurenotify(XEvent *e) {
407 XConfigureEvent *ev = &e->xconfigure;
408
409 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
410 setgeoms();
411 updatebarpos();
412 arrange();
413 }
414 }
415
416 void
417 configurerequest(XEvent *e) {
418 Client *c;
419 XConfigureRequestEvent *ev = &e->xconfigurerequest;
420 XWindowChanges wc;
421
422 if((c = getclient(ev->window))) {
423 if(ev->value_mask & CWBorderWidth)
424 c->border = ev->border_width;
425 if(c->isfixed || c->isfloating || lt->isfloating) {
426 if(ev->value_mask & CWX)
427 c->x = sx + ev->x;
428 if(ev->value_mask & CWY)
429 c->y = sy + ev->y;
430 if(ev->value_mask & CWWidth)
431 c->w = ev->width;
432 if(ev->value_mask & CWHeight)
433 c->h = ev->height;
434 if((c->x - sx + c->w) > sw && c->isfloating)
435 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
436 if((c->y - sy + c->h) > sh && c->isfloating)
437 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
438 if((ev->value_mask & (CWX|CWY))
439 && !(ev->value_mask & (CWWidth|CWHeight)))
440 configure(c);
441 if(isvisible(c))
442 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
443 }
444 else
445 configure(c);
446 }
447 else {
448 wc.x = ev->x;
449 wc.y = ev->y;
450 wc.width = ev->width;
451 wc.height = ev->height;
452 wc.border_width = ev->border_width;
453 wc.sibling = ev->above;
454 wc.stack_mode = ev->detail;
455 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
456 }
457 XSync(dpy, False);
458 }
459
460 void
461 destroynotify(XEvent *e) {
462 Client *c;
463 XDestroyWindowEvent *ev = &e->xdestroywindow;
464
465 if((c = getclient(ev->window)))
466 unmanage(c);
467 }
468
469 void
470 detach(Client *c) {
471 if(c->prev)
472 c->prev->next = c->next;
473 if(c->next)
474 c->next->prev = c->prev;
475 if(c == clients)
476 clients = c->next;
477 c->next = c->prev = NULL;
478 }
479
480 void
481 detachstack(Client *c) {
482 Client **tc;
483
484 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
485 *tc = c->snext;
486 }
487
488 void
489 drawbar(void) {
490 int i, x;
491 Client *c;
492
493 dc.x = 0;
494 for(c = stack; c && !isvisible(c); c = c->snext);
495 for(i = 0; i < LENGTH(tags); i++) {
496 dc.w = textw(tags[i]);
497 if(seltags[i]) {
498 drawtext(tags[i], dc.sel, isurgent(i));
499 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
500 }
501 else {
502 drawtext(tags[i], dc.norm, isurgent(i));
503 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
504 }
505 dc.x += dc.w;
506 }
507 dc.w = blw;
508 drawtext(lt->symbol, dc.norm, False);
509 x = dc.x + dc.w;
510 dc.w = textw(stext);
511 dc.x = bw - dc.w;
512 if(dc.x < x) {
513 dc.x = x;
514 dc.w = bw - x;
515 }
516 drawtext(stext, dc.norm, False);
517 if((dc.w = dc.x - x) > bh) {
518 dc.x = x;
519 if(c) {
520 drawtext(c->name, dc.sel, False);
521 drawsquare(False, c->isfloating, False, dc.sel);
522 }
523 else
524 drawtext(NULL, dc.norm, False);
525 }
526 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
527 XSync(dpy, False);
528 }
529
530 void
531 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
532 int x;
533 XGCValues gcv;
534 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
535
536 gcv.foreground = col[invert ? ColBG : ColFG];
537 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
538 x = (dc.font.ascent + dc.font.descent + 2) / 4;
539 r.x = dc.x + 1;
540 r.y = dc.y + 1;
541 if(filled) {
542 r.width = r.height = x + 1;
543 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
544 }
545 else if(empty) {
546 r.width = r.height = x;
547 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
548 }
549 }
550
551 void
552 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
553 int x, y, w, h;
554 unsigned int len, olen;
555 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
556
557 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
558 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
559 if(!text)
560 return;
561 w = 0;
562 olen = len = strlen(text);
563 if(len >= sizeof buf)
564 len = sizeof buf - 1;
565 memcpy(buf, text, len);
566 buf[len] = 0;
567 h = dc.font.ascent + dc.font.descent;
568 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
569 x = dc.x + (h / 2);
570 /* shorten text if necessary */
571 while(len && (w = textnw(buf, len)) > dc.w - h)
572 buf[--len] = 0;
573 if(len < olen) {
574 if(len > 1)
575 buf[len - 1] = '.';
576 if(len > 2)
577 buf[len - 2] = '.';
578 if(len > 3)
579 buf[len - 3] = '.';
580 }
581 if(w > dc.w)
582 return; /* too long */
583 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
584 if(dc.font.set)
585 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
586 else
587 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
588 }
589
590 void *
591 emallocz(unsigned int size) {
592 void *res = calloc(1, size);
593
594 if(!res)
595 eprint("fatal: could not malloc() %u bytes\n", size);
596 return res;
597 }
598
599 void
600 enternotify(XEvent *e) {
601 Client *c;
602 XCrossingEvent *ev = &e->xcrossing;
603
604 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
605 return;
606 if((c = getclient(ev->window)))
607 focus(c);
608 else
609 focus(NULL);
610 }
611
612 void
613 eprint(const char *errstr, ...) {
614 va_list ap;
615
616 va_start(ap, errstr);
617 vfprintf(stderr, errstr, ap);
618 va_end(ap);
619 exit(EXIT_FAILURE);
620 }
621
622 void
623 expose(XEvent *e) {
624 XExposeEvent *ev = &e->xexpose;
625
626 if(ev->count == 0 && (ev->window == barwin))
627 drawbar();
628 }
629
630 void
631 floating(void) { /* default floating layout */
632 Client *c;
633
634 for(c = clients; c; c = c->next)
635 if(isvisible(c))
636 resize(c, c->x, c->y, c->w, c->h, True);
637 }
638
639 void
640 focus(Client *c) {
641 if(!c || (c && !isvisible(c)))
642 for(c = stack; c && !isvisible(c); c = c->snext);
643 if(sel && sel != c) {
644 grabbuttons(sel, False);
645 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
646 }
647 if(c) {
648 detachstack(c);
649 attachstack(c);
650 grabbuttons(c, True);
651 }
652 sel = c;
653 if(c) {
654 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
655 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
656 }
657 else
658 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
659 drawbar();
660 }
661
662 void
663 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
664 XFocusChangeEvent *ev = &e->xfocus;
665
666 if(sel && ev->window != sel->win)
667 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
668 }
669
670 void
671 focusnext(const char *arg) {
672 Client *c;
673
674 if(!sel)
675 return;
676 for(c = sel->next; c && !isvisible(c); c = c->next);
677 if(!c)
678 for(c = clients; c && !isvisible(c); c = c->next);
679 if(c) {
680 focus(c);
681 restack();
682 }
683 }
684
685 void
686 focusprev(const char *arg) {
687 Client *c;
688
689 if(!sel)
690 return;
691 for(c = sel->prev; c && !isvisible(c); c = c->prev);
692 if(!c) {
693 for(c = clients; c && c->next; c = c->next);
694 for(; c && !isvisible(c); c = c->prev);
695 }
696 if(c) {
697 focus(c);
698 restack();
699 }
700 }
701
702 Client *
703 getclient(Window w) {
704 Client *c;
705
706 for(c = clients; c && c->win != w; c = c->next);
707 return c;
708 }
709
710 unsigned long
711 getcolor(const char *colstr) {
712 Colormap cmap = DefaultColormap(dpy, screen);
713 XColor color;
714
715 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
716 eprint("error, cannot allocate color '%s'\n", colstr);
717 return color.pixel;
718 }
719
720 long
721 getstate(Window w) {
722 int format, status;
723 long result = -1;
724 unsigned char *p = NULL;
725 unsigned long n, extra;
726 Atom real;
727
728 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
729 &real, &format, &n, &extra, (unsigned char **)&p);
730 if(status != Success)
731 return -1;
732 if(n != 0)
733 result = *p;
734 XFree(p);
735 return result;
736 }
737
738 Bool
739 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
740 char **list = NULL;
741 int n;
742 XTextProperty name;
743
744 if(!text || size == 0)
745 return False;
746 text[0] = '\0';
747 XGetTextProperty(dpy, w, &name, atom);
748 if(!name.nitems)
749 return False;
750 if(name.encoding == XA_STRING)
751 strncpy(text, (char *)name.value, size - 1);
752 else {
753 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
754 && n > 0 && *list) {
755 strncpy(text, *list, size - 1);
756 XFreeStringList(list);
757 }
758 }
759 text[size - 1] = '\0';
760 XFree(name.value);
761 return True;
762 }
763
764 void
765 grabbuttons(Client *c, Bool focused) {
766 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
767
768 if(focused) {
769 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
770 GrabModeAsync, GrabModeSync, None, None);
771 XGrabButton(dpy, Button1, MODKEY|LockMask, c->win, False, BUTTONMASK,
772 GrabModeAsync, GrabModeSync, None, None);
773 XGrabButton(dpy, Button1, MODKEY|numlockmask, c->win, False, BUTTONMASK,
774 GrabModeAsync, GrabModeSync, None, None);
775 XGrabButton(dpy, Button1, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
776 GrabModeAsync, GrabModeSync, None, None);
777
778 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
779 GrabModeAsync, GrabModeSync, None, None);
780 XGrabButton(dpy, Button2, MODKEY|LockMask, c->win, False, BUTTONMASK,
781 GrabModeAsync, GrabModeSync, None, None);
782 XGrabButton(dpy, Button2, MODKEY|numlockmask, c->win, False, BUTTONMASK,
783 GrabModeAsync, GrabModeSync, None, None);
784 XGrabButton(dpy, Button2, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
785 GrabModeAsync, GrabModeSync, None, None);
786
787 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
788 GrabModeAsync, GrabModeSync, None, None);
789 XGrabButton(dpy, Button3, MODKEY|LockMask, c->win, False, BUTTONMASK,
790 GrabModeAsync, GrabModeSync, None, None);
791 XGrabButton(dpy, Button3, MODKEY|numlockmask, c->win, False, BUTTONMASK,
792 GrabModeAsync, GrabModeSync, None, None);
793 XGrabButton(dpy, Button3, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
794 GrabModeAsync, GrabModeSync, None, None);
795 }
796 else
797 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
798 GrabModeAsync, GrabModeSync, None, None);
799 }
800
801 void
802 grabkeys(void) {
803 unsigned int i, j;
804 KeyCode code;
805 XModifierKeymap *modmap;
806
807 /* init modifier map */
808 modmap = XGetModifierMapping(dpy);
809 for(i = 0; i < 8; i++)
810 for(j = 0; j < modmap->max_keypermod; j++) {
811 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
812 numlockmask = (1 << i);
813 }
814 XFreeModifiermap(modmap);
815
816 XUngrabKey(dpy, AnyKey, AnyModifier, root);
817 for(i = 0; i < LENGTH(keys); i++) {
818 code = XKeysymToKeycode(dpy, keys[i].keysym);
819 XGrabKey(dpy, code, keys[i].mod, root, True,
820 GrabModeAsync, GrabModeAsync);
821 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
822 GrabModeAsync, GrabModeAsync);
823 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
824 GrabModeAsync, GrabModeAsync);
825 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
826 GrabModeAsync, GrabModeAsync);
827 }
828 }
829
830 unsigned int
831 idxoftag(const char *t) {
832 unsigned int i;
833
834 for(i = 0; (i < LENGTH(tags)) && (tags[i] != t); i++);
835 return (i < LENGTH(tags)) ? i : 0;
836 }
837
838 void
839 initfont(const char *fontstr) {
840 char *def, **missing;
841 int i, n;
842
843 missing = NULL;
844 if(dc.font.set)
845 XFreeFontSet(dpy, dc.font.set);
846 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
847 if(missing) {
848 while(n--)
849 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
850 XFreeStringList(missing);
851 }
852 if(dc.font.set) {
853 XFontSetExtents *font_extents;
854 XFontStruct **xfonts;
855 char **font_names;
856 dc.font.ascent = dc.font.descent = 0;
857 font_extents = XExtentsOfFontSet(dc.font.set);
858 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
859 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
860 if(dc.font.ascent < (*xfonts)->ascent)
861 dc.font.ascent = (*xfonts)->ascent;
862 if(dc.font.descent < (*xfonts)->descent)
863 dc.font.descent = (*xfonts)->descent;
864 xfonts++;
865 }
866 }
867 else {
868 if(dc.font.xfont)
869 XFreeFont(dpy, dc.font.xfont);
870 dc.font.xfont = NULL;
871 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
872 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
873 eprint("error, cannot load font: '%s'\n", fontstr);
874 dc.font.ascent = dc.font.xfont->ascent;
875 dc.font.descent = dc.font.xfont->descent;
876 }
877 dc.font.height = dc.font.ascent + dc.font.descent;
878 }
879
880 Bool
881 isoccupied(unsigned int t) {
882 Client *c;
883
884 for(c = clients; c; c = c->next)
885 if(c->tags[t])
886 return True;
887 return False;
888 }
889
890 Bool
891 isprotodel(Client *c) {
892 int i, n;
893 Atom *protocols;
894 Bool ret = False;
895
896 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
897 for(i = 0; !ret && i < n; i++)
898 if(protocols[i] == wmatom[WMDelete])
899 ret = True;
900 XFree(protocols);
901 }
902 return ret;
903 }
904
905 Bool
906 isurgent(unsigned int t) {
907 Client *c;
908
909 for(c = clients; c; c = c->next)
910 if(c->isurgent && c->tags[t])
911 return True;
912 return False;
913 }
914
915 Bool
916 isvisible(Client *c) {
917 unsigned int i;
918
919 for(i = 0; i < LENGTH(tags); i++)
920 if(c->tags[i] && seltags[i])
921 return True;
922 return False;
923 }
924
925 void
926 keypress(XEvent *e) {
927 unsigned int i;
928 KeySym keysym;
929 XKeyEvent *ev;
930
931 ev = &e->xkey;
932 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
933 for(i = 0; i < LENGTH(keys); i++)
934 if(keysym == keys[i].keysym
935 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
936 {
937 if(keys[i].func)
938 keys[i].func(keys[i].arg);
939 }
940 }
941
942 void
943 killclient(const char *arg) {
944 XEvent ev;
945
946 if(!sel)
947 return;
948 if(isprotodel(sel)) {
949 ev.type = ClientMessage;
950 ev.xclient.window = sel->win;
951 ev.xclient.message_type = wmatom[WMProtocols];
952 ev.xclient.format = 32;
953 ev.xclient.data.l[0] = wmatom[WMDelete];
954 ev.xclient.data.l[1] = CurrentTime;
955 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
956 }
957 else
958 XKillClient(dpy, sel->win);
959 }
960
961 void
962 manage(Window w, XWindowAttributes *wa) {
963 Client *c, *t = NULL;
964 Status rettrans;
965 Window trans;
966 XWindowChanges wc;
967
968 c = emallocz(sizeof(Client));
969 c->tags = emallocz(TAGSZ);
970 c->win = w;
971
972 /* geometry */
973 c->x = wa->x;
974 c->y = wa->y;
975 c->w = wa->width;
976 c->h = wa->height;
977 c->oldborder = wa->border_width;
978 if(c->w == sw && c->h == sh) {
979 c->x = sx;
980 c->y = sy;
981 c->border = wa->border_width;
982 }
983 else {
984 if(c->x + c->w + 2 * c->border > wx + ww)
985 c->x = wx + ww - c->w - 2 * c->border;
986 if(c->y + c->h + 2 * c->border > wy + wh)
987 c->y = wy + wh - c->h - 2 * c->border;
988 if(c->x < wx)
989 c->x = wx;
990 if(c->y < wy)
991 c->y = wy;
992 c->border = BORDERPX;
993 }
994
995 wc.border_width = c->border;
996 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
997 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
998 configure(c); /* propagates border_width, if size doesn't change */
999 updatesizehints(c);
1000 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1001 grabbuttons(c, False);
1002 updatetitle(c);
1003 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1004 for(t = clients; t && t->win != trans; t = t->next);
1005 if(t)
1006 memcpy(c->tags, t->tags, TAGSZ);
1007 else
1008 applyrules(c);
1009 if(!c->isfloating)
1010 c->isfloating = (rettrans == Success) || c->isfixed;
1011 attach(c);
1012 attachstack(c);
1013 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1014 ban(c);
1015 XMapWindow(dpy, c->win);
1016 setclientstate(c, NormalState);
1017 arrange();
1018 }
1019
1020 void
1021 mappingnotify(XEvent *e) {
1022 XMappingEvent *ev = &e->xmapping;
1023
1024 XRefreshKeyboardMapping(ev);
1025 if(ev->request == MappingKeyboard)
1026 grabkeys();
1027 }
1028
1029 void
1030 maprequest(XEvent *e) {
1031 static XWindowAttributes wa;
1032 XMapRequestEvent *ev = &e->xmaprequest;
1033
1034 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1035 return;
1036 if(wa.override_redirect)
1037 return;
1038 if(!getclient(ev->window))
1039 manage(ev->window, &wa);
1040 }
1041
1042 void
1043 monocle(void) {
1044 Client *c;
1045
1046 for(c = clients; c; c = c->next)
1047 if(isvisible(c))
1048 resize(c, mox, moy, mow, moh, RESIZEHINTS);
1049 }
1050
1051 void
1052 movemouse(Client *c) {
1053 int x1, y1, ocx, ocy, di, nx, ny;
1054 unsigned int dui;
1055 Window dummy;
1056 XEvent ev;
1057
1058 ocx = nx = c->x;
1059 ocy = ny = c->y;
1060 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1061 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1062 return;
1063 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1064 for(;;) {
1065 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1066 switch (ev.type) {
1067 case ButtonRelease:
1068 XUngrabPointer(dpy, CurrentTime);
1069 return;
1070 case ConfigureRequest:
1071 case Expose:
1072 case MapRequest:
1073 handler[ev.type](&ev);
1074 break;
1075 case MotionNotify:
1076 XSync(dpy, False);
1077 nx = ocx + (ev.xmotion.x - x1);
1078 ny = ocy + (ev.xmotion.y - y1);
1079 if(abs(wx - nx) < SNAP)
1080 nx = wx;
1081 else if(abs((wx + ww) - (nx + c->w + 2 * c->border)) < SNAP)
1082 nx = wx + ww - c->w - 2 * c->border;
1083 if(abs(wy - ny) < SNAP)
1084 ny = wy;
1085 else if(abs((wy + wh) - (ny + c->h + 2 * c->border)) < SNAP)
1086 ny = wy + wh - c->h - 2 * c->border;
1087 if(!c->isfloating && !lt->isfloating && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1088 togglefloating(NULL);
1089 if((lt->isfloating) || c->isfloating)
1090 resize(c, nx, ny, c->w, c->h, False);
1091 break;
1092 }
1093 }
1094 }
1095
1096 Client *
1097 nexttiled(Client *c) {
1098 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1099 return c;
1100 }
1101
1102 void
1103 propertynotify(XEvent *e) {
1104 Client *c;
1105 Window trans;
1106 XPropertyEvent *ev = &e->xproperty;
1107
1108 if(ev->state == PropertyDelete)
1109 return; /* ignore */
1110 if((c = getclient(ev->window))) {
1111 switch (ev->atom) {
1112 default: break;
1113 case XA_WM_TRANSIENT_FOR:
1114 XGetTransientForHint(dpy, c->win, &trans);
1115 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1116 arrange();
1117 break;
1118 case XA_WM_NORMAL_HINTS:
1119 updatesizehints(c);
1120 break;
1121 case XA_WM_HINTS:
1122 updatewmhints(c);
1123 drawbar();
1124 break;
1125 }
1126 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1127 updatetitle(c);
1128 if(c == sel)
1129 drawbar();
1130 }
1131 }
1132 }
1133
1134 void
1135 quit(const char *arg) {
1136 readin = running = False;
1137 }
1138
1139 void
1140 reapply(const char *arg) {
1141 static Bool zerotags[LENGTH(tags)] = { 0 };
1142 Client *c;
1143
1144 for(c = clients; c; c = c->next) {
1145 memcpy(c->tags, zerotags, sizeof zerotags);
1146 applyrules(c);
1147 }
1148 arrange();
1149 }
1150
1151 void
1152 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1153 XWindowChanges wc;
1154
1155 if(sizehints) {
1156 /* set minimum possible */
1157 if (w < 1)
1158 w = 1;
1159 if (h < 1)
1160 h = 1;
1161
1162 /* temporarily remove base dimensions */
1163 w -= c->basew;
1164 h -= c->baseh;
1165
1166 /* adjust for aspect limits */
1167 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1168 if (w * c->maxay > h * c->maxax)
1169 w = h * c->maxax / c->maxay;
1170 else if (w * c->minay < h * c->minax)
1171 h = w * c->minay / c->minax;
1172 }
1173
1174 /* adjust for increment value */
1175 if(c->incw)
1176 w -= w % c->incw;
1177 if(c->inch)
1178 h -= h % c->inch;
1179
1180 /* restore base dimensions */
1181 w += c->basew;
1182 h += c->baseh;
1183
1184 if(c->minw > 0 && w < c->minw)
1185 w = c->minw;
1186 if(c->minh > 0 && h < c->minh)
1187 h = c->minh;
1188 if(c->maxw > 0 && w > c->maxw)
1189 w = c->maxw;
1190 if(c->maxh > 0 && h > c->maxh)
1191 h = c->maxh;
1192 }
1193 if(w <= 0 || h <= 0)
1194 return;
1195 if(x > sx + sw)
1196 x = sw - w - 2 * c->border;
1197 if(y > sy + sh)
1198 y = sh - h - 2 * c->border;
1199 if(x + w + 2 * c->border < sx)
1200 x = sx;
1201 if(y + h + 2 * c->border < sy)
1202 y = sy;
1203 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1204 c->x = wc.x = x;
1205 c->y = wc.y = y;
1206 c->w = wc.width = w;
1207 c->h = wc.height = h;
1208 wc.border_width = c->border;
1209 XConfigureWindow(dpy, c->win,
1210 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1211 configure(c);
1212 XSync(dpy, False);
1213 }
1214 }
1215
1216 void
1217 resizemouse(Client *c) {
1218 int ocx, ocy;
1219 int nw, nh;
1220 XEvent ev;
1221
1222 ocx = c->x;
1223 ocy = c->y;
1224 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1225 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1226 return;
1227 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1228 for(;;) {
1229 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1230 switch(ev.type) {
1231 case ButtonRelease:
1232 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1233 c->w + c->border - 1, c->h + c->border - 1);
1234 XUngrabPointer(dpy, CurrentTime);
1235 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1236 return;
1237 case ConfigureRequest:
1238 case Expose:
1239 case MapRequest:
1240 handler[ev.type](&ev);
1241 break;
1242 case MotionNotify:
1243 XSync(dpy, False);
1244 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1245 nw = 1;
1246 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1247 nh = 1;
1248 if(!c->isfloating && !lt->isfloating && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1249 togglefloating(NULL);
1250 if((lt->isfloating) || c->isfloating)
1251 resize(c, c->x, c->y, nw, nh, True);
1252 break;
1253 }
1254 }
1255 }
1256
1257 void
1258 restack(void) {
1259 Client *c;
1260 XEvent ev;
1261 XWindowChanges wc;
1262
1263 drawbar();
1264 if(!sel)
1265 return;
1266 if(sel->isfloating || lt->isfloating)
1267 XRaiseWindow(dpy, sel->win);
1268 if(!lt->isfloating) {
1269 wc.stack_mode = Below;
1270 wc.sibling = barwin;
1271 if(!sel->isfloating) {
1272 XConfigureWindow(dpy, sel->win, CWSibling|CWStackMode, &wc);
1273 wc.sibling = sel->win;
1274 }
1275 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1276 if(c == sel)
1277 continue;
1278 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1279 wc.sibling = c->win;
1280 }
1281 }
1282 XSync(dpy, False);
1283 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1284 }
1285
1286 void
1287 run(void) {
1288 char *p;
1289 char sbuf[sizeof stext];
1290 fd_set rd;
1291 int r, xfd;
1292 unsigned int len, offset;
1293 XEvent ev;
1294
1295 /* main event loop, also reads status text from stdin */
1296 XSync(dpy, False);
1297 xfd = ConnectionNumber(dpy);
1298 readin = True;
1299 offset = 0;
1300 len = sizeof stext - 1;
1301 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1302 while(running) {
1303 FD_ZERO(&rd);
1304 if(readin)
1305 FD_SET(STDIN_FILENO, &rd);
1306 FD_SET(xfd, &rd);
1307 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1308 if(errno == EINTR)
1309 continue;
1310 eprint("select failed\n");
1311 }
1312 if(FD_ISSET(STDIN_FILENO, &rd)) {
1313 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1314 case -1:
1315 strncpy(stext, strerror(errno), len);
1316 readin = False;
1317 break;
1318 case 0:
1319 strncpy(stext, "EOF", 4);
1320 readin = False;
1321 break;
1322 default:
1323 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1324 if(*p == '\n' || *p == '\0') {
1325 *p = '\0';
1326 strncpy(stext, sbuf, len);
1327 p += r - 1; /* p is sbuf + offset + r - 1 */
1328 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1329 offset = r;
1330 if(r)
1331 memmove(sbuf, p - r + 1, r);
1332 break;
1333 }
1334 break;
1335 }
1336 drawbar();
1337 }
1338 while(XPending(dpy)) {
1339 XNextEvent(dpy, &ev);
1340 if(handler[ev.type])
1341 (handler[ev.type])(&ev); /* call handler */
1342 }
1343 }
1344 }
1345
1346 void
1347 scan(void) {
1348 unsigned int i, num;
1349 Window *wins, d1, d2;
1350 XWindowAttributes wa;
1351
1352 wins = NULL;
1353 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1354 for(i = 0; i < num; i++) {
1355 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1356 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1357 continue;
1358 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1359 manage(wins[i], &wa);
1360 }
1361 for(i = 0; i < num; i++) { /* now the transients */
1362 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1363 continue;
1364 if(XGetTransientForHint(dpy, wins[i], &d1)
1365 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1366 manage(wins[i], &wa);
1367 }
1368 }
1369 if(wins)
1370 XFree(wins);
1371 }
1372
1373 void
1374 setclientstate(Client *c, long state) {
1375 long data[] = {state, None};
1376
1377 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1378 PropModeReplace, (unsigned char *)data, 2);
1379 }
1380
1381 void
1382 setdefaultgeoms(void) {
1383
1384 /* screen dimensions */
1385 sx = 0;
1386 sy = 0;
1387 sw = DisplayWidth(dpy, screen);
1388 sh = DisplayHeight(dpy, screen);
1389
1390 /* bar position */
1391 bx = sx;
1392 by = sy;
1393 bw = sw;
1394 bh = dc.font.height + 2;
1395
1396 /* window area */
1397 wx = sx;
1398 wy = sy + bh;
1399 ww = sw;
1400 wh = sh - bh;
1401
1402 /* master area */
1403 mx = wx;
1404 my = wy;
1405 mw = ((float)sw) * 0.55;
1406 mh = wh;
1407
1408 /* tile area */
1409 tx = wx;
1410 ty = wy;
1411 tw = ww - mw;
1412 th = wh;
1413
1414 /* monocle area */
1415 mox = wx;
1416 moy = wy;
1417 mow = ww;
1418 moh = wh;
1419 }
1420
1421 void
1422 setlayout(const char *arg) {
1423 static Layout *revert = 0;
1424 unsigned int i;
1425
1426 if(!arg)
1427 return;
1428 for(i = 0; i < LENGTH(layouts); i++)
1429 if(!strcmp(arg, layouts[i].symbol))
1430 break;
1431 if(i == LENGTH(layouts))
1432 return;
1433 if(revert && &layouts[i] == lt)
1434 lt = revert;
1435 else {
1436 revert = lt;
1437 lt = &layouts[i];
1438 }
1439 if(sel)
1440 arrange();
1441 else
1442 drawbar();
1443 }
1444
1445 void
1446 setup(void) {
1447 unsigned int i;
1448 XSetWindowAttributes wa;
1449
1450 /* init screen */
1451 screen = DefaultScreen(dpy);
1452 root = RootWindow(dpy, screen);
1453 initfont(FONT);
1454
1455 /* apply default geometries */
1456 setgeoms();
1457
1458 /* init atoms */
1459 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1460 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1461 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1462 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1463 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1464 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1465
1466 /* init cursors */
1467 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1468 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1469 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1470
1471 /* init appearance */
1472 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1473 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1474 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1475 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1476 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1477 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1478 initfont(FONT);
1479 dc.h = bh;
1480 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1481 dc.gc = XCreateGC(dpy, root, 0, 0);
1482 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1483 if(!dc.font.set)
1484 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1485
1486 /* init tags */
1487 seltags = emallocz(TAGSZ);
1488 prevtags = emallocz(TAGSZ);
1489 seltags[0] = prevtags[0] = True;
1490
1491 /* init layouts */
1492 lt = &layouts[0];
1493
1494 /* init bar */
1495 for(blw = i = 0; i < LENGTH(layouts); i++) {
1496 i = textw(layouts[i].symbol);
1497 if(i > blw)
1498 blw = i;
1499 }
1500
1501 wa.override_redirect = 1;
1502 wa.background_pixmap = ParentRelative;
1503 wa.event_mask = ButtonPressMask|ExposureMask;
1504
1505 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1506 CopyFromParent, DefaultVisual(dpy, screen),
1507 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1508 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1509 XMapRaised(dpy, barwin);
1510 strcpy(stext, "dwm-"VERSION);
1511 drawbar();
1512
1513 /* EWMH support per view */
1514 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1515 PropModeReplace, (unsigned char *) netatom, NetLast);
1516
1517 /* select for events */
1518 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1519 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1520 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1521 XSelectInput(dpy, root, wa.event_mask);
1522
1523
1524 /* grab keys */
1525 grabkeys();
1526 }
1527
1528 void
1529 spawn(const char *arg) {
1530 static char *shell = NULL;
1531
1532 if(!shell && !(shell = getenv("SHELL")))
1533 shell = "/bin/sh";
1534 if(!arg)
1535 return;
1536 /* The double-fork construct avoids zombie processes and keeps the code
1537 * clean from stupid signal handlers. */
1538 if(fork() == 0) {
1539 if(fork() == 0) {
1540 if(dpy)
1541 close(ConnectionNumber(dpy));
1542 setsid();
1543 execl(shell, shell, "-c", arg, (char *)NULL);
1544 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1545 perror(" failed");
1546 }
1547 exit(0);
1548 }
1549 wait(0);
1550 }
1551
1552 void
1553 tag(const char *arg) {
1554 unsigned int i;
1555
1556 if(!sel)
1557 return;
1558 for(i = 0; i < LENGTH(tags); i++)
1559 sel->tags[i] = (NULL == arg);
1560 sel->tags[idxoftag(arg)] = True;
1561 arrange();
1562 }
1563
1564 unsigned int
1565 textnw(const char *text, unsigned int len) {
1566 XRectangle r;
1567
1568 if(dc.font.set) {
1569 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1570 return r.width;
1571 }
1572 return XTextWidth(dc.font.xfont, text, len);
1573 }
1574
1575 unsigned int
1576 textw(const char *text) {
1577 return textnw(text, strlen(text)) + dc.font.height;
1578 }
1579
1580 void
1581 tileresize(Client *c, int x, int y, int w, int h) {
1582 resize(c, x, y, w, h, RESIZEHINTS);
1583 if((RESIZEHINTS) && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
1584 /* client doesn't accept size constraints */
1585 resize(c, x, y, w, h, False);
1586 }
1587
1588 void
1589 tileh(void) {
1590 tilehstack(tilemaster());
1591 }
1592
1593 void
1594 tilehstack(unsigned int n) {
1595 int i, x, w;
1596 Client *c;
1597
1598 if(n == 0)
1599 return;
1600
1601 x = tx;
1602 w = tw / n;
1603 if(w < bh)
1604 w = tw;
1605
1606 for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++)
1607 if(i > 0) {
1608 if(i > 1 && i == n) /* remainder */
1609 tileresize(c, x, ty, (tx + tw) - x - 2 * c->border,
1610 th - 2 * c->border);
1611 else
1612 tileresize(c, x, ty, w - 2 * c->border,
1613 th - 2 * c->border);
1614 if(w != tw)
1615 x = c->x + c->w + 2 * c->border;
1616 }
1617 }
1618
1619 unsigned int
1620 tilemaster(void) {
1621 unsigned int n;
1622 Client *c, *mc;
1623
1624 for(n = 0, mc = c = nexttiled(clients); c; c = nexttiled(c->next))
1625 n++;
1626 if(n == 0)
1627 return 0;
1628 if(n == 1)
1629 tileresize(mc, mox, moy, mow - 2 * mc->border, moh - 2 * mc->border);
1630 else
1631 tileresize(mc, mx, my, mw - 2 * mc->border, mh - 2 * mc->border);
1632 return n - 1;
1633 }
1634
1635 void
1636 tilev(void) {
1637 tilevstack(tilemaster());
1638 }
1639
1640 void
1641 tilevstack(unsigned int n) {
1642 int i, y, h;
1643 Client *c;
1644
1645 if(n == 0)
1646 return;
1647
1648 y = ty;
1649 h = th / n;
1650 if(h < bh)
1651 h = th;
1652
1653 for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++)
1654 if(i > 0) {
1655 if(i > 1 && i == n) /* remainder */
1656 tileresize(c, tx, y, tw - 2 * c->border,
1657 (ty + th) - y - 2 * c->border);
1658 else
1659 tileresize(c, tx, y, tw - 2 * c->border,
1660 h - 2 * c->border);
1661 if(h != th)
1662 y = c->y + c->h + 2 * c->border;
1663 }
1664 }
1665
1666 void
1667 togglefloating(const char *arg) {
1668 if(!sel)
1669 return;
1670 sel->isfloating = !sel->isfloating;
1671 if(sel->isfloating)
1672 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1673 arrange();
1674 }
1675
1676 void
1677 toggletag(const char *arg) {
1678 unsigned int i, j;
1679
1680 if(!sel)
1681 return;
1682 i = idxoftag(arg);
1683 sel->tags[i] = !sel->tags[i];
1684 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1685 if(j == LENGTH(tags))
1686 sel->tags[i] = True; /* at least one tag must be enabled */
1687 arrange();
1688 }
1689
1690 void
1691 toggleview(const char *arg) {
1692 unsigned int i, j;
1693
1694 i = idxoftag(arg);
1695 seltags[i] = !seltags[i];
1696 for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1697 if(j == LENGTH(tags))
1698 seltags[i] = True; /* at least one tag must be viewed */
1699 arrange();
1700 }
1701
1702 void
1703 unban(Client *c) {
1704 if(!c->isbanned)
1705 return;
1706 XMoveWindow(dpy, c->win, c->x, c->y);
1707 c->isbanned = False;
1708 }
1709
1710 void
1711 unmanage(Client *c) {
1712 XWindowChanges wc;
1713
1714 wc.border_width = c->oldborder;
1715 /* The server grab construct avoids race conditions. */
1716 XGrabServer(dpy);
1717 XSetErrorHandler(xerrordummy);
1718 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1719 detach(c);
1720 detachstack(c);
1721 if(sel == c)
1722 focus(NULL);
1723 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1724 setclientstate(c, WithdrawnState);
1725 free(c->tags);
1726 free(c);
1727 XSync(dpy, False);
1728 XSetErrorHandler(xerror);
1729 XUngrabServer(dpy);
1730 arrange();
1731 }
1732
1733 void
1734 unmapnotify(XEvent *e) {
1735 Client *c;
1736 XUnmapEvent *ev = &e->xunmap;
1737
1738 if((c = getclient(ev->window)))
1739 unmanage(c);
1740 }
1741
1742 void
1743 updatebarpos(void) {
1744
1745 if(dc.drawable != 0)
1746 XFreePixmap(dpy, dc.drawable);
1747 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1748 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1749 }
1750
1751 void
1752 updatesizehints(Client *c) {
1753 long msize;
1754 XSizeHints size;
1755
1756 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1757 size.flags = PSize;
1758 c->flags = size.flags;
1759 if(c->flags & PBaseSize) {
1760 c->basew = size.base_width;
1761 c->baseh = size.base_height;
1762 }
1763 else if(c->flags & PMinSize) {
1764 c->basew = size.min_width;
1765 c->baseh = size.min_height;
1766 }
1767 else
1768 c->basew = c->baseh = 0;
1769 if(c->flags & PResizeInc) {
1770 c->incw = size.width_inc;
1771 c->inch = size.height_inc;
1772 }
1773 else
1774 c->incw = c->inch = 0;
1775 if(c->flags & PMaxSize) {
1776 c->maxw = size.max_width;
1777 c->maxh = size.max_height;
1778 }
1779 else
1780 c->maxw = c->maxh = 0;
1781 if(c->flags & PMinSize) {
1782 c->minw = size.min_width;
1783 c->minh = size.min_height;
1784 }
1785 else if(c->flags & PBaseSize) {
1786 c->minw = size.base_width;
1787 c->minh = size.base_height;
1788 }
1789 else
1790 c->minw = c->minh = 0;
1791 if(c->flags & PAspect) {
1792 c->minax = size.min_aspect.x;
1793 c->maxax = size.max_aspect.x;
1794 c->minay = size.min_aspect.y;
1795 c->maxay = size.max_aspect.y;
1796 }
1797 else
1798 c->minax = c->maxax = c->minay = c->maxay = 0;
1799 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1800 && c->maxw == c->minw && c->maxh == c->minh);
1801 }
1802
1803 void
1804 updatetitle(Client *c) {
1805 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1806 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1807 }
1808
1809 void
1810 updatewmhints(Client *c) {
1811 XWMHints *wmh;
1812
1813 if((wmh = XGetWMHints(dpy, c->win))) {
1814 if(c == sel)
1815 sel->isurgent = False;
1816 else
1817 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1818 XFree(wmh);
1819 }
1820 }
1821
1822
1823 void
1824 view(const char *arg) {
1825 unsigned int i;
1826
1827 for(i = 0; i < LENGTH(tags); i++)
1828 tmp[i] = (NULL == arg);
1829 tmp[idxoftag(arg)] = True;
1830
1831 if(memcmp(seltags, tmp, TAGSZ) != 0) {
1832 memcpy(prevtags, seltags, TAGSZ);
1833 memcpy(seltags, tmp, TAGSZ);
1834 arrange();
1835 }
1836 }
1837
1838 void
1839 viewprevtag(const char *arg) {
1840
1841 memcpy(tmp, seltags, TAGSZ);
1842 memcpy(seltags, prevtags, TAGSZ);
1843 memcpy(prevtags, tmp, TAGSZ);
1844 arrange();
1845 }
1846
1847 /* There's no way to check accesses to destroyed windows, thus those cases are
1848 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1849 * default error handler, which may call exit. */
1850 int
1851 xerror(Display *dpy, XErrorEvent *ee) {
1852 if(ee->error_code == BadWindow
1853 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1854 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1855 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1856 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1857 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1858 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1859 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1860 return 0;
1861 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1862 ee->request_code, ee->error_code);
1863 return xerrorxlib(dpy, ee); /* may call exit */
1864 }
1865
1866 int
1867 xerrordummy(Display *dpy, XErrorEvent *ee) {
1868 return 0;
1869 }
1870
1871 /* Startup Error handler to check if another window manager
1872 * is already running. */
1873 int
1874 xerrorstart(Display *dpy, XErrorEvent *ee) {
1875 otherwm = True;
1876 return -1;
1877 }
1878
1879 void
1880 zoom(const char *arg) {
1881 Client *c = sel;
1882
1883 if(!sel || lt->isfloating || sel->isfloating)
1884 return;
1885 if(c == nexttiled(clients))
1886 if(!(c = nexttiled(c->next)))
1887 return;
1888 detach(c);
1889 attach(c);
1890 focus(c);
1891 arrange();
1892 }
1893
1894 int
1895 main(int argc, char *argv[]) {
1896 if(argc == 2 && !strcmp("-v", argv[1]))
1897 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1898 else if(argc != 1)
1899 eprint("usage: dwm [-v]\n");
1900
1901 setlocale(LC_CTYPE, "");
1902 if(!(dpy = XOpenDisplay(0)))
1903 eprint("dwm: cannot open display\n");
1904
1905 checkotherwm();
1906 setup();
1907 scan();
1908 run();
1909 cleanup();
1910
1911 XCloseDisplay(dpy);
1912 return 0;
1913 }