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applied Peters patch, applied yiyus hint to initfont
[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. For each client dwm
21 * creates a small title window, which is resized whenever the (_NET_)WM_NAME
22 * properties are updated or the client is moved/resized.
23 *
24 * Keys and tagging rules are organized as arrays and defined in config.h.
25 *
26 * To understand everything else, start reading main().
27 */
28 #include <errno.h>
29 #include <locale.h>
30 #include <regex.h>
31 #include <stdarg.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <unistd.h>
36 #include <sys/select.h>
37 #include <sys/wait.h>
38 #include <X11/cursorfont.h>
39 #include <X11/keysym.h>
40 #include <X11/Xatom.h>
41 #include <X11/Xlib.h>
42 #include <X11/Xproto.h>
43 #include <X11/Xutil.h>
44
45 /* macros */
46 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
47 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
48 #define MOUSEMASK (BUTTONMASK | PointerMotionMask)
49
50 /* enums */
51 enum { BarTop, BarBot, BarOff }; /* bar position */
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; /* revert geometry */
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, ismax, isfloating, wasfloating;
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 *tags;
105 Bool isfloating;
106 } Rule;
107
108 typedef struct {
109 regex_t *propregex;
110 regex_t *tagregex;
111 } Regs;
112
113 /* forward declarations */
114 void applyrules(Client *c);
115 void arrange(void);
116 void attach(Client *c);
117 void attachstack(Client *c);
118 void ban(Client *c);
119 void buttonpress(XEvent *e);
120 void checkotherwm(void);
121 void cleanup(void);
122 void compileregs(void);
123 void configure(Client *c);
124 void configurenotify(XEvent *e);
125 void configurerequest(XEvent *e);
126 void destroynotify(XEvent *e);
127 void detach(Client *c);
128 void detachstack(Client *c);
129 void drawbar(void);
130 void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
131 void drawtext(const char *text, unsigned long col[ColLast]);
132 void *emallocz(unsigned int size);
133 void enternotify(XEvent *e);
134 void eprint(const char *errstr, ...);
135 void expose(XEvent *e);
136 void floating(void); /* default floating layout */
137 void focus(Client *c);
138 void focusnext(const char *arg);
139 void focusprev(const char *arg);
140 Client *getclient(Window w);
141 unsigned long getcolor(const char *colstr);
142 long getstate(Window w);
143 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
144 void grabbuttons(Client *c, Bool focused);
145 unsigned int idxoftag(const char *tag);
146 void initfont(const char *fontstr);
147 Bool isarrange(void (*func)());
148 Bool isoccupied(unsigned int t);
149 Bool isprotodel(Client *c);
150 Bool isvisible(Client *c);
151 void keypress(XEvent *e);
152 void killclient(const char *arg);
153 void leavenotify(XEvent *e);
154 void manage(Window w, XWindowAttributes *wa);
155 void mappingnotify(XEvent *e);
156 void maprequest(XEvent *e);
157 void movemouse(Client *c);
158 Client *nexttiled(Client *c);
159 void propertynotify(XEvent *e);
160 void quit(const char *arg);
161 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
162 void resizemouse(Client *c);
163 void restack(void);
164 void run(void);
165 void scan(void);
166 void setclientstate(Client *c, long state);
167 void setlayout(const char *arg);
168 void setmwfact(const char *arg);
169 void setup(void);
170 void spawn(const char *arg);
171 void tag(const char *arg);
172 unsigned int textnw(const char *text, unsigned int len);
173 unsigned int textw(const char *text);
174 void tile(void);
175 void togglebar(const char *arg);
176 void togglefloating(const char *arg);
177 void togglemax(const char *arg);
178 void toggletag(const char *arg);
179 void toggleview(const char *arg);
180 void unban(Client *c);
181 void unmanage(Client *c);
182 void unmapnotify(XEvent *e);
183 void updatebarpos(void);
184 void updatesizehints(Client *c);
185 void updatetitle(Client *c);
186 void view(const char *arg);
187 int xerror(Display *dpy, XErrorEvent *ee);
188 int xerrordummy(Display *dsply, XErrorEvent *ee);
189 int xerrorstart(Display *dsply, XErrorEvent *ee);
190 void zoom(const char *arg);
191
192 /* variables */
193 char stext[256];
194 double mwfact;
195 int screen, sx, sy, sw, sh, wax, way, waw, wah;
196 int (*xerrorxlib)(Display *, XErrorEvent *);
197 unsigned int bh, bpos, ntags;
198 unsigned int blw = 0;
199 unsigned int ltidx = 0; /* default */
200 unsigned int nlayouts = 0;
201 unsigned int nrules = 0;
202 unsigned int numlockmask = 0;
203 void (*handler[LASTEvent]) (XEvent *) = {
204 [ButtonPress] = buttonpress,
205 [ConfigureRequest] = configurerequest,
206 [ConfigureNotify] = configurenotify,
207 [DestroyNotify] = destroynotify,
208 [EnterNotify] = enternotify,
209 [LeaveNotify] = leavenotify,
210 [Expose] = expose,
211 [KeyPress] = keypress,
212 [MappingNotify] = mappingnotify,
213 [MapRequest] = maprequest,
214 [PropertyNotify] = propertynotify,
215 [UnmapNotify] = unmapnotify
216 };
217 Atom wmatom[WMLast], netatom[NetLast];
218 Bool otherwm, readin;
219 Bool running = True;
220 Bool *seltags;
221 Bool selscreen = True;
222 Client *clients = NULL;
223 Client *sel = NULL;
224 Client *stack = NULL;
225 Cursor cursor[CurLast];
226 Display *dpy;
227 DC dc = {0};
228 Window barwin, root;
229 Regs *regs = NULL;
230
231 /* configuration, allows nested code to access above variables */
232 #include "config.h"
233
234 /* functions*/
235 void
236 applyrules(Client *c) {
237 static char buf[512];
238 unsigned int i, j;
239 regmatch_t tmp;
240 Bool matched = False;
241 XClassHint ch = { 0 };
242
243 /* rule matching */
244 XGetClassHint(dpy, c->win, &ch);
245 snprintf(buf, sizeof buf, "%s:%s:%s",
246 ch.res_class ? ch.res_class : "",
247 ch.res_name ? ch.res_name : "", c->name);
248 for(i = 0; i < nrules; i++)
249 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
250 c->isfloating = rules[i].isfloating;
251 for(j = 0; regs[i].tagregex && j < ntags; j++) {
252 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
253 matched = True;
254 c->tags[j] = True;
255 }
256 }
257 }
258 if(ch.res_class)
259 XFree(ch.res_class);
260 if(ch.res_name)
261 XFree(ch.res_name);
262 if(!matched)
263 for(i = 0; i < ntags; i++)
264 c->tags[i] = seltags[i];
265 }
266
267 void
268 arrange(void) {
269 Client *c;
270
271 for(c = clients; c; c = c->next)
272 if(isvisible(c))
273 unban(c);
274 else
275 ban(c);
276 layouts[ltidx].arrange();
277 focus(NULL);
278 restack();
279 }
280
281 void
282 attach(Client *c) {
283 if(clients)
284 clients->prev = c;
285 c->next = clients;
286 clients = c;
287 }
288
289 void
290 attachstack(Client *c) {
291 c->snext = stack;
292 stack = c;
293 }
294
295 void
296 ban(Client *c) {
297 if(c->isbanned)
298 return;
299 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
300 c->isbanned = True;
301 }
302
303 void
304 buttonpress(XEvent *e) {
305 unsigned int i, x;
306 Client *c;
307 XButtonPressedEvent *ev = &e->xbutton;
308
309 if(barwin == ev->window) {
310 x = 0;
311 for(i = 0; i < ntags; i++) {
312 x += textw(tags[i]);
313 if(ev->x < x) {
314 if(ev->button == Button1) {
315 if(ev->state & MODKEY)
316 tag(tags[i]);
317 else
318 view(tags[i]);
319 }
320 else if(ev->button == Button3) {
321 if(ev->state & MODKEY)
322 toggletag(tags[i]);
323 else
324 toggleview(tags[i]);
325 }
326 return;
327 }
328 }
329 if((ev->x < x + blw) && ev->button == Button1)
330 setlayout(NULL);
331 }
332 else if((c = getclient(ev->window))) {
333 focus(c);
334 if(CLEANMASK(ev->state) != MODKEY)
335 return;
336 if(ev->button == Button1) {
337 if(isarrange(floating) || c->isfloating)
338 restack();
339 else
340 togglefloating(NULL);
341 movemouse(c);
342 }
343 else if(ev->button == Button2) {
344 if(isarrange(tile) && !c->isfixed && c->isfloating)
345 togglefloating(NULL);
346 else
347 zoom(NULL);
348 }
349 else if(ev->button == Button3 && !c->isfixed) {
350 if(isarrange(floating) || c->isfloating)
351 restack();
352 else
353 togglefloating(NULL);
354 resizemouse(c);
355 }
356 }
357 }
358
359 void
360 checkotherwm(void) {
361 otherwm = False;
362 XSetErrorHandler(xerrorstart);
363
364 /* this causes an error if some other window manager is running */
365 XSelectInput(dpy, root, SubstructureRedirectMask);
366 XSync(dpy, False);
367 if(otherwm)
368 eprint("dwm: another window manager is already running\n");
369 XSync(dpy, False);
370 XSetErrorHandler(NULL);
371 xerrorxlib = XSetErrorHandler(xerror);
372 XSync(dpy, False);
373 }
374
375 void
376 cleanup(void) {
377 close(STDIN_FILENO);
378 while(stack) {
379 unban(stack);
380 unmanage(stack);
381 }
382 if(dc.font.set)
383 XFreeFontSet(dpy, dc.font.set);
384 else
385 XFreeFont(dpy, dc.font.xfont);
386 XUngrabKey(dpy, AnyKey, AnyModifier, root);
387 XFreePixmap(dpy, dc.drawable);
388 XFreeGC(dpy, dc.gc);
389 XDestroyWindow(dpy, barwin);
390 XFreeCursor(dpy, cursor[CurNormal]);
391 XFreeCursor(dpy, cursor[CurResize]);
392 XFreeCursor(dpy, cursor[CurMove]);
393 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
394 XSync(dpy, False);
395 free(seltags);
396 }
397
398 void
399 compileregs(void) {
400 unsigned int i;
401 regex_t *reg;
402
403 if(regs)
404 return;
405 nrules = sizeof rules / sizeof rules[0];
406 regs = emallocz(nrules * sizeof(Regs));
407 for(i = 0; i < nrules; i++) {
408 if(rules[i].prop) {
409 reg = emallocz(sizeof(regex_t));
410 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
411 free(reg);
412 else
413 regs[i].propregex = reg;
414 }
415 if(rules[i].tags) {
416 reg = emallocz(sizeof(regex_t));
417 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
418 free(reg);
419 else
420 regs[i].tagregex = reg;
421 }
422 }
423 }
424
425 void
426 configure(Client *c) {
427 XConfigureEvent ce;
428
429 ce.type = ConfigureNotify;
430 ce.display = dpy;
431 ce.event = c->win;
432 ce.window = c->win;
433 ce.x = c->x;
434 ce.y = c->y;
435 ce.width = c->w;
436 ce.height = c->h;
437 ce.border_width = c->border;
438 ce.above = None;
439 ce.override_redirect = False;
440 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
441 }
442
443 void
444 configurenotify(XEvent *e) {
445 XConfigureEvent *ev = &e->xconfigure;
446
447 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
448 sw = ev->width;
449 sh = ev->height;
450 XFreePixmap(dpy, dc.drawable);
451 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
452 XResizeWindow(dpy, barwin, sw, bh);
453 updatebarpos();
454 arrange();
455 }
456 }
457
458 void
459 configurerequest(XEvent *e) {
460 Client *c;
461 XConfigureRequestEvent *ev = &e->xconfigurerequest;
462 XWindowChanges wc;
463
464 if((c = getclient(ev->window))) {
465 c->ismax = False;
466 if(ev->value_mask & CWBorderWidth)
467 c->border = ev->border_width;
468 if(c->isfixed || c->isfloating || isarrange(floating)) {
469 if(ev->value_mask & CWX)
470 c->x = ev->x;
471 if(ev->value_mask & CWY)
472 c->y = ev->y;
473 if(ev->value_mask & CWWidth)
474 c->w = ev->width;
475 if(ev->value_mask & CWHeight)
476 c->h = ev->height;
477 if((c->x + c->w) > sw && c->isfloating)
478 c->x = sw / 2 - c->w / 2; /* center in x direction */
479 if((c->y + c->h) > sh && c->isfloating)
480 c->y = sh / 2 - c->h / 2; /* center in y direction */
481 if((ev->value_mask & (CWX | CWY))
482 && !(ev->value_mask & (CWWidth | CWHeight)))
483 configure(c);
484 if(isvisible(c))
485 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
486 }
487 else
488 configure(c);
489 }
490 else {
491 wc.x = ev->x;
492 wc.y = ev->y;
493 wc.width = ev->width;
494 wc.height = ev->height;
495 wc.border_width = ev->border_width;
496 wc.sibling = ev->above;
497 wc.stack_mode = ev->detail;
498 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
499 }
500 XSync(dpy, False);
501 }
502
503 void
504 destroynotify(XEvent *e) {
505 Client *c;
506 XDestroyWindowEvent *ev = &e->xdestroywindow;
507
508 if((c = getclient(ev->window)))
509 unmanage(c);
510 }
511
512 void
513 detach(Client *c) {
514 if(c->prev)
515 c->prev->next = c->next;
516 if(c->next)
517 c->next->prev = c->prev;
518 if(c == clients)
519 clients = c->next;
520 c->next = c->prev = NULL;
521 }
522
523 void
524 detachstack(Client *c) {
525 Client **tc;
526
527 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
528 *tc = c->snext;
529 }
530
531 void
532 drawbar(void) {
533 int i, x;
534
535 dc.x = dc.y = 0;
536 for(i = 0; i < ntags; i++) {
537 dc.w = textw(tags[i]);
538 if(seltags[i]) {
539 drawtext(tags[i], dc.sel);
540 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
541 }
542 else {
543 drawtext(tags[i], dc.norm);
544 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
545 }
546 dc.x += dc.w;
547 }
548 dc.w = blw;
549 drawtext(layouts[ltidx].symbol, dc.norm);
550 x = dc.x + dc.w;
551 dc.w = textw(stext);
552 dc.x = sw - dc.w;
553 if(dc.x < x) {
554 dc.x = x;
555 dc.w = sw - x;
556 }
557 drawtext(stext, dc.norm);
558 if((dc.w = dc.x - x) > bh) {
559 dc.x = x;
560 if(sel) {
561 drawtext(sel->name, dc.sel);
562 drawsquare(sel->ismax, sel->isfloating, dc.sel);
563 }
564 else
565 drawtext(NULL, dc.norm);
566 }
567 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
568 XSync(dpy, False);
569 }
570
571 void
572 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
573 int x;
574 XGCValues gcv;
575 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
576
577 gcv.foreground = col[ColFG];
578 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
579 x = (dc.font.ascent + dc.font.descent + 2) / 4;
580 r.x = dc.x + 1;
581 r.y = dc.y + 1;
582 if(filled) {
583 r.width = r.height = x + 1;
584 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
585 }
586 else if(empty) {
587 r.width = r.height = x;
588 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
589 }
590 }
591
592 void
593 drawtext(const char *text, unsigned long col[ColLast]) {
594 int x, y, w, h;
595 static char buf[256];
596 unsigned int len, olen;
597 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
598
599 XSetForeground(dpy, dc.gc, col[ColBG]);
600 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
601 if(!text)
602 return;
603 w = 0;
604 olen = len = strlen(text);
605 if(len >= sizeof buf)
606 len = sizeof buf - 1;
607 memcpy(buf, text, len);
608 buf[len] = 0;
609 h = dc.font.ascent + dc.font.descent;
610 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
611 x = dc.x + (h / 2);
612 /* shorten text if necessary */
613 while(len && (w = textnw(buf, len)) > dc.w - h)
614 buf[--len] = 0;
615 if(len < olen) {
616 if(len > 1)
617 buf[len - 1] = '.';
618 if(len > 2)
619 buf[len - 2] = '.';
620 if(len > 3)
621 buf[len - 3] = '.';
622 }
623 if(w > dc.w)
624 return; /* too long */
625 XSetForeground(dpy, dc.gc, col[ColFG]);
626 if(dc.font.set)
627 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
628 else
629 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
630 }
631
632 void *
633 emallocz(unsigned int size) {
634 void *res = calloc(1, size);
635
636 if(!res)
637 eprint("fatal: could not malloc() %u bytes\n", size);
638 return res;
639 }
640
641 void
642 enternotify(XEvent *e) {
643 Client *c;
644 XCrossingEvent *ev = &e->xcrossing;
645
646 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
647 return;
648 if((c = getclient(ev->window)))
649 focus(c);
650 else if(ev->window == root) {
651 selscreen = True;
652 focus(NULL);
653 }
654 }
655
656 void
657 eprint(const char *errstr, ...) {
658 va_list ap;
659
660 va_start(ap, errstr);
661 vfprintf(stderr, errstr, ap);
662 va_end(ap);
663 exit(EXIT_FAILURE);
664 }
665
666 void
667 expose(XEvent *e) {
668 XExposeEvent *ev = &e->xexpose;
669
670 if(ev->count == 0) {
671 if(barwin == ev->window)
672 drawbar();
673 }
674 }
675
676 void
677 floating(void) { /* default floating layout */
678 Client *c;
679
680 for(c = clients; c; c = c->next)
681 if(isvisible(c))
682 resize(c, c->x, c->y, c->w, c->h, True);
683 }
684
685 void
686 focus(Client *c) {
687 if((!c && selscreen) || (c && !isvisible(c)))
688 for(c = stack; c && !isvisible(c); c = c->snext);
689 if(sel && sel != c) {
690 grabbuttons(sel, False);
691 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
692 }
693 if(c) {
694 detachstack(c);
695 attachstack(c);
696 grabbuttons(c, True);
697 }
698 sel = c;
699 drawbar();
700 if(!selscreen)
701 return;
702 if(c) {
703 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
704 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
705 }
706 else
707 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
708 }
709
710 void
711 focusnext(const char *arg) {
712 Client *c;
713
714 if(!sel)
715 return;
716 for(c = sel->next; c && !isvisible(c); c = c->next);
717 if(!c)
718 for(c = clients; c && !isvisible(c); c = c->next);
719 if(c) {
720 focus(c);
721 restack();
722 }
723 }
724
725 void
726 focusprev(const char *arg) {
727 Client *c;
728
729 if(!sel)
730 return;
731 for(c = sel->prev; c && !isvisible(c); c = c->prev);
732 if(!c) {
733 for(c = clients; c && c->next; c = c->next);
734 for(; c && !isvisible(c); c = c->prev);
735 }
736 if(c) {
737 focus(c);
738 restack();
739 }
740 }
741
742 Client *
743 getclient(Window w) {
744 Client *c;
745
746 for(c = clients; c && c->win != w; c = c->next);
747 return c;
748 }
749
750 unsigned long
751 getcolor(const char *colstr) {
752 Colormap cmap = DefaultColormap(dpy, screen);
753 XColor color;
754
755 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
756 eprint("error, cannot allocate color '%s'\n", colstr);
757 return color.pixel;
758 }
759
760 long
761 getstate(Window w) {
762 int format, status;
763 long result = -1;
764 unsigned char *p = NULL;
765 unsigned long n, extra;
766 Atom real;
767
768 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
769 &real, &format, &n, &extra, (unsigned char **)&p);
770 if(status != Success)
771 return -1;
772 if(n != 0)
773 result = *p;
774 XFree(p);
775 return result;
776 }
777
778 Bool
779 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
780 char **list = NULL;
781 int n;
782 XTextProperty name;
783
784 if(!text || size == 0)
785 return False;
786 text[0] = '\0';
787 XGetTextProperty(dpy, w, &name, atom);
788 if(!name.nitems)
789 return False;
790 if(name.encoding == XA_STRING)
791 strncpy(text, (char *)name.value, size - 1);
792 else {
793 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
794 && n > 0 && *list)
795 {
796 strncpy(text, *list, size - 1);
797 XFreeStringList(list);
798 }
799 }
800 text[size - 1] = '\0';
801 XFree(name.value);
802 return True;
803 }
804
805 void
806 grabbuttons(Client *c, Bool focused) {
807 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
808
809 if(focused) {
810 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
811 GrabModeAsync, GrabModeSync, None, None);
812 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
813 GrabModeAsync, GrabModeSync, None, None);
814 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
815 GrabModeAsync, GrabModeSync, None, None);
816 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
817 GrabModeAsync, GrabModeSync, None, None);
818
819 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
820 GrabModeAsync, GrabModeSync, None, None);
821 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
822 GrabModeAsync, GrabModeSync, None, None);
823 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
824 GrabModeAsync, GrabModeSync, None, None);
825 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
826 GrabModeAsync, GrabModeSync, None, None);
827
828 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
829 GrabModeAsync, GrabModeSync, None, None);
830 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
831 GrabModeAsync, GrabModeSync, None, None);
832 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
833 GrabModeAsync, GrabModeSync, None, None);
834 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
835 GrabModeAsync, GrabModeSync, None, None);
836 }
837 else
838 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
839 GrabModeAsync, GrabModeSync, None, None);
840 }
841
842 unsigned int
843 idxoftag(const char *tag) {
844 unsigned int i;
845
846 for(i = 0; i < ntags; i++)
847 if(tags[i] == tag)
848 return i;
849 return 0;
850 }
851
852 void
853 initfont(const char *fontstr) {
854 char *def, **missing;
855 int i, n;
856
857 missing = NULL;
858 if(dc.font.set)
859 XFreeFontSet(dpy, dc.font.set);
860 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
861 if(missing) {
862 while(n--)
863 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
864 XFreeStringList(missing);
865 }
866 if(dc.font.set) {
867 XFontSetExtents *font_extents;
868 XFontStruct **xfonts;
869 char **font_names;
870 dc.font.ascent = dc.font.descent = 0;
871 font_extents = XExtentsOfFontSet(dc.font.set);
872 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
873 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
874 if(dc.font.ascent < (*xfonts)->ascent)
875 dc.font.ascent = (*xfonts)->ascent;
876 if(dc.font.descent < (*xfonts)->descent)
877 dc.font.descent = (*xfonts)->descent;
878 xfonts++;
879 }
880 }
881 else {
882 if(dc.font.xfont)
883 XFreeFont(dpy, dc.font.xfont);
884 dc.font.xfont = NULL;
885 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
886 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
887 eprint("error, cannot load font: '%s'\n", fontstr);
888 dc.font.ascent = dc.font.xfont->ascent;
889 dc.font.descent = dc.font.xfont->descent;
890 }
891 dc.font.height = dc.font.ascent + dc.font.descent;
892 }
893
894 Bool
895 isarrange(void (*func)())
896 {
897 return func == layouts[ltidx].arrange;
898 }
899
900 Bool
901 isoccupied(unsigned int t) {
902 Client *c;
903
904 for(c = clients; c; c = c->next)
905 if(c->tags[t])
906 return True;
907 return False;
908 }
909
910 Bool
911 isprotodel(Client *c) {
912 int i, n;
913 Atom *protocols;
914 Bool ret = False;
915
916 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
917 for(i = 0; !ret && i < n; i++)
918 if(protocols[i] == wmatom[WMDelete])
919 ret = True;
920 XFree(protocols);
921 }
922 return ret;
923 }
924
925 Bool
926 isvisible(Client *c) {
927 unsigned int i;
928
929 for(i = 0; i < ntags; i++)
930 if(c->tags[i] && seltags[i])
931 return True;
932 return False;
933 }
934
935 void
936 keypress(XEvent *e) {
937 KEYS
938 unsigned int len = sizeof keys / sizeof keys[0];
939 unsigned int i;
940 KeyCode code;
941 KeySym keysym;
942 XKeyEvent *ev;
943
944 if(!e) { /* grabkeys */
945 XUngrabKey(dpy, AnyKey, AnyModifier, root);
946 for(i = 0; i < len; i++) {
947 code = XKeysymToKeycode(dpy, keys[i].keysym);
948 XGrabKey(dpy, code, keys[i].mod, root, True,
949 GrabModeAsync, GrabModeAsync);
950 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
951 GrabModeAsync, GrabModeAsync);
952 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
953 GrabModeAsync, GrabModeAsync);
954 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
955 GrabModeAsync, GrabModeAsync);
956 }
957 return;
958 }
959 ev = &e->xkey;
960 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
961 for(i = 0; i < len; i++)
962 if(keysym == keys[i].keysym
963 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
964 {
965 if(keys[i].func)
966 keys[i].func(keys[i].arg);
967 }
968 }
969
970 void
971 killclient(const char *arg) {
972 XEvent ev;
973
974 if(!sel)
975 return;
976 if(isprotodel(sel)) {
977 ev.type = ClientMessage;
978 ev.xclient.window = sel->win;
979 ev.xclient.message_type = wmatom[WMProtocols];
980 ev.xclient.format = 32;
981 ev.xclient.data.l[0] = wmatom[WMDelete];
982 ev.xclient.data.l[1] = CurrentTime;
983 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
984 }
985 else
986 XKillClient(dpy, sel->win);
987 }
988
989 void
990 leavenotify(XEvent *e) {
991 XCrossingEvent *ev = &e->xcrossing;
992
993 if((ev->window == root) && !ev->same_screen) {
994 selscreen = False;
995 focus(NULL);
996 }
997 }
998
999 void
1000 manage(Window w, XWindowAttributes *wa) {
1001 unsigned int i;
1002 Client *c, *t = NULL;
1003 Window trans;
1004 Status rettrans;
1005 XWindowChanges wc;
1006
1007 c = emallocz(sizeof(Client));
1008 c->tags = emallocz(ntags * sizeof(Bool));
1009 c->win = w;
1010 c->x = wa->x;
1011 c->y = wa->y;
1012 c->w = wa->width;
1013 c->h = wa->height;
1014 c->oldborder = wa->border_width;
1015 if(c->w == sw && c->h == sh) {
1016 c->x = sx;
1017 c->y = sy;
1018 c->border = wa->border_width;
1019 }
1020 else {
1021 if(c->x + c->w + 2 * c->border > wax + waw)
1022 c->x = wax + waw - c->w - 2 * c->border;
1023 if(c->y + c->h + 2 * c->border > way + wah)
1024 c->y = way + wah - c->h - 2 * c->border;
1025 if(c->x < wax)
1026 c->x = wax;
1027 if(c->y < way)
1028 c->y = way;
1029 c->border = BORDERPX;
1030 }
1031 wc.border_width = c->border;
1032 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1033 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1034 configure(c); /* propagates border_width, if size doesn't change */
1035 updatesizehints(c);
1036 XSelectInput(dpy, w,
1037 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
1038 grabbuttons(c, False);
1039 updatetitle(c);
1040 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1041 for(t = clients; t && t->win != trans; t = t->next);
1042 if(t)
1043 for(i = 0; i < ntags; i++)
1044 c->tags[i] = t->tags[i];
1045 applyrules(c);
1046 if(!c->isfloating)
1047 c->isfloating = (rettrans == Success) || c->isfixed;
1048 attach(c);
1049 attachstack(c);
1050 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1051 ban(c);
1052 XMapWindow(dpy, c->win);
1053 setclientstate(c, NormalState);
1054 arrange();
1055 }
1056
1057 void
1058 mappingnotify(XEvent *e) {
1059 XMappingEvent *ev = &e->xmapping;
1060
1061 XRefreshKeyboardMapping(ev);
1062 if(ev->request == MappingKeyboard)
1063 keypress(NULL);
1064 }
1065
1066 void
1067 maprequest(XEvent *e) {
1068 static XWindowAttributes wa;
1069 XMapRequestEvent *ev = &e->xmaprequest;
1070
1071 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1072 return;
1073 if(wa.override_redirect)
1074 return;
1075 if(!getclient(ev->window))
1076 manage(ev->window, &wa);
1077 }
1078
1079 void
1080 movemouse(Client *c) {
1081 int x1, y1, ocx, ocy, di, nx, ny;
1082 unsigned int dui;
1083 Window dummy;
1084 XEvent ev;
1085
1086 ocx = nx = c->x;
1087 ocy = ny = c->y;
1088 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1089 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1090 return;
1091 c->ismax = False;
1092 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1093 for(;;) {
1094 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1095 switch (ev.type) {
1096 case ButtonRelease:
1097 XUngrabPointer(dpy, CurrentTime);
1098 return;
1099 case ConfigureRequest:
1100 case Expose:
1101 case MapRequest:
1102 handler[ev.type](&ev);
1103 break;
1104 case MotionNotify:
1105 XSync(dpy, False);
1106 nx = ocx + (ev.xmotion.x - x1);
1107 ny = ocy + (ev.xmotion.y - y1);
1108 if(abs(wax + nx) < SNAP)
1109 nx = wax;
1110 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1111 nx = wax + waw - c->w - 2 * c->border;
1112 if(abs(way - ny) < SNAP)
1113 ny = way;
1114 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1115 ny = way + wah - c->h - 2 * c->border;
1116 resize(c, nx, ny, c->w, c->h, False);
1117 break;
1118 }
1119 }
1120 }
1121
1122 Client *
1123 nexttiled(Client *c) {
1124 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1125 return c;
1126 }
1127
1128 void
1129 propertynotify(XEvent *e) {
1130 Client *c;
1131 Window trans;
1132 XPropertyEvent *ev = &e->xproperty;
1133
1134 if(ev->state == PropertyDelete)
1135 return; /* ignore */
1136 if((c = getclient(ev->window))) {
1137 switch (ev->atom) {
1138 default: break;
1139 case XA_WM_TRANSIENT_FOR:
1140 XGetTransientForHint(dpy, c->win, &trans);
1141 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1142 arrange();
1143 break;
1144 case XA_WM_NORMAL_HINTS:
1145 updatesizehints(c);
1146 break;
1147 }
1148 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1149 updatetitle(c);
1150 if(c == sel)
1151 drawbar();
1152 }
1153 }
1154 }
1155
1156 void
1157 quit(const char *arg) {
1158 readin = running = False;
1159 }
1160
1161 void
1162 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1163 double dx, dy, max, min, ratio;
1164 XWindowChanges wc;
1165
1166 if(sizehints) {
1167 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
1168 dx = (double)(w - c->basew);
1169 dy = (double)(h - c->baseh);
1170 min = (double)(c->minax) / (double)(c->minay);
1171 max = (double)(c->maxax) / (double)(c->maxay);
1172 ratio = dx / dy;
1173 if(max > 0 && min > 0 && ratio > 0) {
1174 if(ratio < min) {
1175 dy = (dx * min + dy) / (min * min + 1);
1176 dx = dy * min;
1177 w = (int)dx + c->basew;
1178 h = (int)dy + c->baseh;
1179 }
1180 else if(ratio > max) {
1181 dy = (dx * min + dy) / (max * max + 1);
1182 dx = dy * min;
1183 w = (int)dx + c->basew;
1184 h = (int)dy + c->baseh;
1185 }
1186 }
1187 }
1188 if(c->minw && w < c->minw)
1189 w = c->minw;
1190 if(c->minh && h < c->minh)
1191 h = c->minh;
1192 if(c->maxw && w > c->maxw)
1193 w = c->maxw;
1194 if(c->maxh && h > c->maxh)
1195 h = c->maxh;
1196 if(c->incw)
1197 w -= (w - c->basew) % c->incw;
1198 if(c->inch)
1199 h -= (h - c->baseh) % c->inch;
1200 }
1201 if(w <= 0 || h <= 0)
1202 return;
1203 /* offscreen appearance fixes */
1204 if(x > sw)
1205 x = sw - w - 2 * c->border;
1206 if(y > sh)
1207 y = sh - h - 2 * c->border;
1208 if(x + w + 2 * c->border < sx)
1209 x = sx;
1210 if(y + h + 2 * c->border < sy)
1211 y = sy;
1212 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1213 c->x = wc.x = x;
1214 c->y = wc.y = y;
1215 c->w = wc.width = w;
1216 c->h = wc.height = h;
1217 wc.border_width = c->border;
1218 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1219 configure(c);
1220 XSync(dpy, False);
1221 }
1222 }
1223
1224 void
1225 resizemouse(Client *c) {
1226 int ocx, ocy;
1227 int nw, nh;
1228 XEvent ev;
1229
1230 ocx = c->x;
1231 ocy = c->y;
1232 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1233 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1234 return;
1235 c->ismax = False;
1236 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1237 for(;;) {
1238 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1239 switch(ev.type) {
1240 case ButtonRelease:
1241 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1242 c->w + c->border - 1, c->h + c->border - 1);
1243 XUngrabPointer(dpy, CurrentTime);
1244 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1245 return;
1246 case ConfigureRequest:
1247 case Expose:
1248 case MapRequest:
1249 handler[ev.type](&ev);
1250 break;
1251 case MotionNotify:
1252 XSync(dpy, False);
1253 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1254 nw = 1;
1255 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1256 nh = 1;
1257 resize(c, c->x, c->y, nw, nh, True);
1258 break;
1259 }
1260 }
1261 }
1262
1263 void
1264 restack(void) {
1265 Client *c;
1266 XEvent ev;
1267 XWindowChanges wc;
1268
1269 drawbar();
1270 if(!sel)
1271 return;
1272 if(sel->isfloating || isarrange(floating))
1273 XRaiseWindow(dpy, sel->win);
1274 if(!isarrange(floating)) {
1275 wc.stack_mode = Below;
1276 wc.sibling = barwin;
1277 if(!sel->isfloating) {
1278 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1279 wc.sibling = sel->win;
1280 }
1281 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1282 if(c == sel)
1283 continue;
1284 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1285 wc.sibling = c->win;
1286 }
1287 }
1288 XSync(dpy, False);
1289 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1290 }
1291
1292 void
1293 run(void) {
1294 char *p;
1295 int r, xfd;
1296 fd_set rd;
1297 XEvent ev;
1298
1299 /* main event loop, also reads status text from stdin */
1300 XSync(dpy, False);
1301 xfd = ConnectionNumber(dpy);
1302 readin = True;
1303 while(running) {
1304 FD_ZERO(&rd);
1305 if(readin)
1306 FD_SET(STDIN_FILENO, &rd);
1307 FD_SET(xfd, &rd);
1308 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1309 if(errno == EINTR)
1310 continue;
1311 eprint("select failed\n");
1312 }
1313 if(FD_ISSET(STDIN_FILENO, &rd)) {
1314 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1315 case -1:
1316 strncpy(stext, strerror(errno), sizeof stext - 1);
1317 stext[sizeof stext - 1] = '\0';
1318 readin = False;
1319 break;
1320 case 0:
1321 strncpy(stext, "EOF", 4);
1322 readin = False;
1323 break;
1324 default:
1325 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1326 for(; p >= stext && *p != '\n'; --p);
1327 if(p > stext)
1328 strncpy(stext, p + 1, sizeof stext);
1329 }
1330 drawbar();
1331 }
1332 while(XPending(dpy)) {
1333 XNextEvent(dpy, &ev);
1334 if(handler[ev.type])
1335 (handler[ev.type])(&ev); /* call handler */
1336 }
1337 }
1338 }
1339
1340 void
1341 scan(void) {
1342 unsigned int i, num;
1343 Window *wins, d1, d2;
1344 XWindowAttributes wa;
1345
1346 wins = NULL;
1347 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1348 for(i = 0; i < num; i++) {
1349 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1350 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1351 continue;
1352 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1353 manage(wins[i], &wa);
1354 }
1355 for(i = 0; i < num; i++) { /* now the transients */
1356 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1357 continue;
1358 if(XGetTransientForHint(dpy, wins[i], &d1)
1359 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1360 manage(wins[i], &wa);
1361 }
1362 }
1363 if(wins)
1364 XFree(wins);
1365 }
1366
1367 void
1368 setclientstate(Client *c, long state) {
1369 long data[] = {state, None};
1370
1371 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1372 PropModeReplace, (unsigned char *)data, 2);
1373 }
1374
1375 void
1376 setlayout(const char *arg) {
1377 unsigned int i;
1378
1379 if(!arg) {
1380 if(++ltidx == nlayouts)
1381 ltidx = 0;;
1382 }
1383 else {
1384 for(i = 0; i < nlayouts; i++)
1385 if(!strcmp(arg, layouts[i].symbol))
1386 break;
1387 if(i == nlayouts)
1388 return;
1389 ltidx = i;
1390 }
1391 if(sel)
1392 arrange();
1393 else
1394 drawbar();
1395 }
1396
1397 void
1398 setmwfact(const char *arg) {
1399 double delta;
1400
1401 if(!isarrange(tile))
1402 return;
1403 /* arg handling, manipulate mwfact */
1404 if(arg == NULL)
1405 mwfact = MWFACT;
1406 else if(1 == sscanf(arg, "%lf", &delta)) {
1407 if(arg[0] == '+' || arg[0] == '-')
1408 mwfact += delta;
1409 else
1410 mwfact = delta;
1411 if(mwfact < 0.1)
1412 mwfact = 0.1;
1413 else if(mwfact > 0.9)
1414 mwfact = 0.9;
1415 }
1416 arrange();
1417 }
1418
1419 void
1420 setup(void) {
1421 unsigned int i, j, mask;
1422 Window w;
1423 XModifierKeymap *modmap;
1424 XSetWindowAttributes wa;
1425
1426 /* init atoms */
1427 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1428 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1429 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1430 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1431 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1432 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1433 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1434 PropModeReplace, (unsigned char *) netatom, NetLast);
1435
1436 /* init cursors */
1437 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1438 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1439 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1440
1441 /* init geometry */
1442 sx = sy = 0;
1443 sw = DisplayWidth(dpy, screen);
1444 sh = DisplayHeight(dpy, screen);
1445
1446 /* init modifier map */
1447 modmap = XGetModifierMapping(dpy);
1448 for(i = 0; i < 8; i++)
1449 for(j = 0; j < modmap->max_keypermod; j++) {
1450 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1451 == XKeysymToKeycode(dpy, XK_Num_Lock))
1452 numlockmask = (1 << i);
1453 }
1454 XFreeModifiermap(modmap);
1455
1456 /* select for events */
1457 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1458 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1459 wa.cursor = cursor[CurNormal];
1460 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1461 XSelectInput(dpy, root, wa.event_mask);
1462
1463 /* grab keys */
1464 keypress(NULL);
1465
1466 /* init tags */
1467 compileregs();
1468 for(ntags = 0; tags[ntags]; ntags++);
1469 seltags = emallocz(sizeof(Bool) * ntags);
1470 seltags[0] = True;
1471
1472 /* init appearance */
1473 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1474 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1475 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1476 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1477 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1478 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1479 initfont(FONT);
1480 dc.h = bh = dc.font.height + 2;
1481
1482 /* init layouts */
1483 mwfact = MWFACT;
1484 nlayouts = sizeof layouts / sizeof layouts[0];
1485 for(blw = i = 0; i < nlayouts; i++) {
1486 j = textw(layouts[i].symbol);
1487 if(j > blw)
1488 blw = j;
1489 }
1490
1491 /* init bar */
1492 bpos = BARPOS;
1493 wa.override_redirect = 1;
1494 wa.background_pixmap = ParentRelative;
1495 wa.event_mask = ButtonPressMask | ExposureMask;
1496 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1497 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1498 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1499 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1500 updatebarpos();
1501 XMapRaised(dpy, barwin);
1502 strcpy(stext, "dwm-"VERSION);
1503 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1504 dc.gc = XCreateGC(dpy, root, 0, 0);
1505 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1506 if(!dc.font.set)
1507 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1508
1509 /* multihead support */
1510 selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
1511 }
1512
1513 void
1514 spawn(const char *arg) {
1515 static char *shell = NULL;
1516
1517 if(!shell && !(shell = getenv("SHELL")))
1518 shell = "/bin/sh";
1519 if(!arg)
1520 return;
1521 /* The double-fork construct avoids zombie processes and keeps the code
1522 * clean from stupid signal handlers. */
1523 if(fork() == 0) {
1524 if(fork() == 0) {
1525 if(dpy)
1526 close(ConnectionNumber(dpy));
1527 setsid();
1528 execl(shell, shell, "-c", arg, (char *)NULL);
1529 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1530 perror(" failed");
1531 }
1532 exit(0);
1533 }
1534 wait(0);
1535 }
1536
1537 void
1538 tag(const char *arg) {
1539 unsigned int i;
1540
1541 if(!sel)
1542 return;
1543 for(i = 0; i < ntags; i++)
1544 sel->tags[i] = arg == NULL;
1545 i = idxoftag(arg);
1546 if(i >= 0 && i < ntags)
1547 sel->tags[i] = True;
1548 arrange();
1549 }
1550
1551 unsigned int
1552 textnw(const char *text, unsigned int len) {
1553 XRectangle r;
1554
1555 if(dc.font.set) {
1556 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1557 return r.width;
1558 }
1559 return XTextWidth(dc.font.xfont, text, len);
1560 }
1561
1562 unsigned int
1563 textw(const char *text) {
1564 return textnw(text, strlen(text)) + dc.font.height;
1565 }
1566
1567 void
1568 tile(void) {
1569 unsigned int i, n, nx, ny, nw, nh, mw, th;
1570 Client *c;
1571
1572 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1573 n++;
1574
1575 /* window geoms */
1576 mw = (n == 1) ? waw : mwfact * waw;
1577 th = (n > 1) ? wah / (n - 1) : 0;
1578 if(n > 1 && th < bh)
1579 th = wah;
1580
1581 nx = wax;
1582 ny = way;
1583 for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1584 c->ismax = False;
1585 if(i == 0) { /* master */
1586 nw = mw - 2 * c->border;
1587 nh = wah - 2 * c->border;
1588 }
1589 else { /* tile window */
1590 if(i == 1) {
1591 ny = way;
1592 nx += mw;
1593 }
1594 nw = waw - mw - 2 * c->border;
1595 if(i + 1 == n) /* remainder */
1596 nh = (way + wah) - ny - 2 * c->border;
1597 else
1598 nh = th - 2 * c->border;
1599 }
1600 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1601 if(n > 1 && th != wah)
1602 ny += nh + 2 * c->border;
1603 }
1604 }
1605
1606 void
1607 togglebar(const char *arg) {
1608 if(bpos == BarOff)
1609 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1610 else
1611 bpos = BarOff;
1612 updatebarpos();
1613 arrange();
1614 }
1615
1616 void
1617 togglefloating(const char *arg) {
1618 if(!sel)
1619 return;
1620 sel->isfloating = !sel->isfloating;
1621 if(sel->isfloating)
1622 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1623 arrange();
1624 }
1625
1626 void
1627 togglemax(const char *arg) {
1628 XEvent ev;
1629
1630 if(!sel || sel->isfixed)
1631 return;
1632 if((sel->ismax = !sel->ismax)) {
1633 if(isarrange(floating) || sel->isfloating)
1634 sel->wasfloating = True;
1635 else {
1636 togglefloating(NULL);
1637 sel->wasfloating = False;
1638 }
1639 sel->rx = sel->x;
1640 sel->ry = sel->y;
1641 sel->rw = sel->w;
1642 sel->rh = sel->h;
1643 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1644 }
1645 else {
1646 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1647 if(!sel->wasfloating)
1648 togglefloating(NULL);
1649 }
1650 drawbar();
1651 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1652 }
1653
1654 void
1655 toggletag(const char *arg) {
1656 unsigned int i, j;
1657
1658 if(!sel)
1659 return;
1660 i = idxoftag(arg);
1661 sel->tags[i] = !sel->tags[i];
1662 for(j = 0; j < ntags && !sel->tags[j]; j++);
1663 if(j == ntags)
1664 sel->tags[i] = True;
1665 arrange();
1666 }
1667
1668 void
1669 toggleview(const char *arg) {
1670 unsigned int i, j;
1671
1672 i = idxoftag(arg);
1673 seltags[i] = !seltags[i];
1674 for(j = 0; j < ntags && !seltags[j]; j++);
1675 if(j == ntags)
1676 seltags[i] = True; /* cannot toggle last view */
1677 arrange();
1678 }
1679
1680 void
1681 unban(Client *c) {
1682 if(!c->isbanned)
1683 return;
1684 XMoveWindow(dpy, c->win, c->x, c->y);
1685 c->isbanned = False;
1686 }
1687
1688 void
1689 unmanage(Client *c) {
1690 XWindowChanges wc;
1691
1692 wc.border_width = c->oldborder;
1693 /* The server grab construct avoids race conditions. */
1694 XGrabServer(dpy);
1695 XSetErrorHandler(xerrordummy);
1696 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1697 detach(c);
1698 detachstack(c);
1699 if(sel == c)
1700 focus(NULL);
1701 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1702 setclientstate(c, WithdrawnState);
1703 free(c->tags);
1704 free(c);
1705 XSync(dpy, False);
1706 XSetErrorHandler(xerror);
1707 XUngrabServer(dpy);
1708 arrange();
1709 }
1710
1711 void
1712 unmapnotify(XEvent *e) {
1713 Client *c;
1714 XUnmapEvent *ev = &e->xunmap;
1715
1716 if((c = getclient(ev->window)))
1717 unmanage(c);
1718 }
1719
1720 void
1721 updatebarpos(void) {
1722 XEvent ev;
1723
1724 wax = sx;
1725 way = sy;
1726 wah = sh;
1727 waw = sw;
1728 switch(bpos) {
1729 default:
1730 wah -= bh;
1731 way += bh;
1732 XMoveWindow(dpy, barwin, sx, sy);
1733 break;
1734 case BarBot:
1735 wah -= bh;
1736 XMoveWindow(dpy, barwin, sx, sy + wah);
1737 break;
1738 case BarOff:
1739 XMoveWindow(dpy, barwin, sx, sy - bh);
1740 break;
1741 }
1742 XSync(dpy, False);
1743 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1744 }
1745
1746 void
1747 updatesizehints(Client *c) {
1748 long msize;
1749 XSizeHints size;
1750
1751 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1752 size.flags = PSize;
1753 c->flags = size.flags;
1754 if(c->flags & PBaseSize) {
1755 c->basew = size.base_width;
1756 c->baseh = size.base_height;
1757 }
1758 else if(c->flags & PMinSize) {
1759 c->basew = size.min_width;
1760 c->baseh = size.min_height;
1761 }
1762 else
1763 c->basew = c->baseh = 0;
1764 if(c->flags & PResizeInc) {
1765 c->incw = size.width_inc;
1766 c->inch = size.height_inc;
1767 }
1768 else
1769 c->incw = c->inch = 0;
1770 if(c->flags & PMaxSize) {
1771 c->maxw = size.max_width;
1772 c->maxh = size.max_height;
1773 }
1774 else
1775 c->maxw = c->maxh = 0;
1776 if(c->flags & PMinSize) {
1777 c->minw = size.min_width;
1778 c->minh = size.min_height;
1779 }
1780 else if(c->flags & PBaseSize) {
1781 c->minw = size.base_width;
1782 c->minh = size.base_height;
1783 }
1784 else
1785 c->minw = c->minh = 0;
1786 if(c->flags & PAspect) {
1787 c->minax = size.min_aspect.x;
1788 c->maxax = size.max_aspect.x;
1789 c->minay = size.min_aspect.y;
1790 c->maxay = size.max_aspect.y;
1791 }
1792 else
1793 c->minax = c->maxax = c->minay = c->maxay = 0;
1794 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1795 && c->maxw == c->minw && c->maxh == c->minh);
1796 }
1797
1798 void
1799 updatetitle(Client *c) {
1800 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1801 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1802 }
1803
1804 /* There's no way to check accesses to destroyed windows, thus those cases are
1805 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1806 * default error handler, which may call exit. */
1807 int
1808 xerror(Display *dpy, XErrorEvent *ee) {
1809 if(ee->error_code == BadWindow
1810 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1811 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1812 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1813 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1814 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1815 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1816 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1817 return 0;
1818 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1819 ee->request_code, ee->error_code);
1820 return xerrorxlib(dpy, ee); /* may call exit */
1821 }
1822
1823 int
1824 xerrordummy(Display *dsply, XErrorEvent *ee) {
1825 return 0;
1826 }
1827
1828 /* Startup Error handler to check if another window manager
1829 * is already running. */
1830 int
1831 xerrorstart(Display *dsply, XErrorEvent *ee) {
1832 otherwm = True;
1833 return -1;
1834 }
1835
1836 void
1837 view(const char *arg) {
1838 unsigned int i;
1839
1840 for(i = 0; i < ntags; i++)
1841 seltags[i] = arg == NULL;
1842 i = idxoftag(arg);
1843 if(i >= 0 && i < ntags)
1844 seltags[i] = True;
1845 arrange();
1846 }
1847
1848 void
1849 zoom(const char *arg) {
1850 Client *c;
1851
1852 if(!sel || !isarrange(tile) || sel->isfloating)
1853 return;
1854 if((c = sel) == nexttiled(clients))
1855 if(!(c = nexttiled(c->next)))
1856 return;
1857 detach(c);
1858 attach(c);
1859 focus(c);
1860 arrange();
1861 }
1862
1863 int
1864 main(int argc, char *argv[]) {
1865 if(argc == 2 && !strcmp("-v", argv[1]))
1866 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1867 else if(argc != 1)
1868 eprint("usage: dwm [-v]\n");
1869
1870 setlocale(LC_CTYPE, "");
1871 if(!(dpy = XOpenDisplay(0)))
1872 eprint("dwm: cannot open display\n");
1873 screen = DefaultScreen(dpy);
1874 root = RootWindow(dpy, screen);
1875
1876 checkotherwm();
1877 setup();
1878 drawbar();
1879 scan();
1880 run();
1881 cleanup();
1882
1883 XCloseDisplay(dpy);
1884 return 0;
1885 }