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some sanity changes
[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 <stdarg.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <unistd.h>
35 #include <sys/select.h>
36 #include <sys/types.h>
37 #include <sys/wait.h>
38 #include <regex.h>
39 #include <X11/cursorfont.h>
40 #include <X11/keysym.h>
41 #include <X11/Xatom.h>
42 #include <X11/Xlib.h>
43 #include <X11/Xproto.h>
44 #include <X11/Xutil.h>
45
46 /* macros */
47 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
48 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
49 #define MOUSEMASK (BUTTONMASK | PointerMotionMask)
50
51 /* enums */
52 enum { BarTop, BarBot, BarOff }; /* bar position */
53 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
54 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
55 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
56 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
57
58 /* typedefs */
59 typedef struct Client Client;
60 struct Client {
61 char name[256];
62 int x, y, w, h;
63 int rx, ry, rw, rh; /* revert geometry */
64 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
65 int minax, maxax, minay, maxay;
66 long flags;
67 unsigned int border, oldborder;
68 Bool isbanned, isfixed, ismax, isfloating, wasfloating;
69 Bool *tags;
70 Client *next;
71 Client *prev;
72 Client *snext;
73 Window win;
74 };
75
76 typedef struct {
77 int x, y, w, h;
78 unsigned long norm[ColLast];
79 unsigned long sel[ColLast];
80 Drawable drawable;
81 GC gc;
82 struct {
83 int ascent;
84 int descent;
85 int height;
86 XFontSet set;
87 XFontStruct *xfont;
88 } font;
89 } DC; /* draw context */
90
91 typedef struct {
92 unsigned long mod;
93 KeySym keysym;
94 void (*func)(const char *arg);
95 const char *arg;
96 } Key;
97
98 typedef struct {
99 const char *symbol;
100 void (*arrange)(void);
101 } Layout;
102
103 typedef struct {
104 const char *prop;
105 const char *tags;
106 Bool isfloating;
107 } Rule;
108
109 typedef struct {
110 regex_t *propregex;
111 regex_t *tagregex;
112 } Regs;
113
114 /* function declarations */
115 void applyrules(Client *c);
116 void arrange(void);
117 void attach(Client *c);
118 void attachstack(Client *c);
119 void ban(Client *c);
120 void buttonpress(XEvent *e);
121 void checkotherwm(void);
122 void cleanup(void);
123 void compileregs(void);
124 void configure(Client *c);
125 void configurenotify(XEvent *e);
126 void configurerequest(XEvent *e);
127 void destroynotify(XEvent *e);
128 void detach(Client *c);
129 void detachstack(Client *c);
130 void drawbar(void);
131 void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
132 void drawtext(const char *text, unsigned long col[ColLast]);
133 void *emallocz(unsigned int size);
134 void enternotify(XEvent *e);
135 void eprint(const char *errstr, ...);
136 void expose(XEvent *e);
137 void floating(void); /* default floating layout */
138 void focus(Client *c);
139 void focusnext(const char *arg);
140 void focusprev(const char *arg);
141 Client *getclient(Window w);
142 unsigned long getcolor(const char *colstr);
143 long getstate(Window w);
144 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
145 void grabbuttons(Client *c, Bool focused);
146 unsigned int idxoftag(const char *tag);
147 void initfont(const char *fontstr);
148 Bool isarrange(void (*func)());
149 Bool isoccupied(unsigned int t);
150 Bool isprotodel(Client *c);
151 Bool isvisible(Client *c);
152 void keypress(XEvent *e);
153 void killclient(const char *arg);
154 void leavenotify(XEvent *e);
155 void manage(Window w, XWindowAttributes *wa);
156 void mappingnotify(XEvent *e);
157 void maprequest(XEvent *e);
158 void movemouse(Client *c);
159 Client *nexttiled(Client *c);
160 void propertynotify(XEvent *e);
161 void quit(const char *arg);
162 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
163 void resizemouse(Client *c);
164 void restack(void);
165 void run(void);
166 void scan(void);
167 void setclientstate(Client *c, long state);
168 void setlayout(const char *arg);
169 void setmwfact(const char *arg);
170 void setup(void);
171 void spawn(const char *arg);
172 void tag(const char *arg);
173 unsigned int textnw(const char *text, unsigned int len);
174 unsigned int textw(const char *text);
175 void tile(void);
176 void togglebar(const char *arg);
177 void togglefloating(const char *arg);
178 void togglemax(const char *arg);
179 void toggletag(const char *arg);
180 void toggleview(const char *arg);
181 void unban(Client *c);
182 void unmanage(Client *c);
183 void unmapnotify(XEvent *e);
184 void updatebarpos(void);
185 void updatesizehints(Client *c);
186 void updatetitle(Client *c);
187 void view(const char *arg);
188 void viewprevtag(const char *arg); /* views previous selected tags */
189 int xerror(Display *dpy, XErrorEvent *ee);
190 int xerrordummy(Display *dsply, XErrorEvent *ee);
191 int xerrorstart(Display *dsply, XErrorEvent *ee);
192 void zoom(const char *arg);
193
194 /* variables */
195 char stext[256];
196 double mwfact;
197 int screen, sx, sy, sw, sh, wax, way, waw, wah;
198 int (*xerrorxlib)(Display *, XErrorEvent *);
199 unsigned int bh, bpos;
200 unsigned int blw = 0;
201 unsigned int ltidx = 0; /* default */
202 unsigned int nlayouts = 0;
203 unsigned int nrules = 0;
204 unsigned int numlockmask = 0;
205 void (*handler[LASTEvent]) (XEvent *) = {
206 [ButtonPress] = buttonpress,
207 [ConfigureRequest] = configurerequest,
208 [ConfigureNotify] = configurenotify,
209 [DestroyNotify] = destroynotify,
210 [EnterNotify] = enternotify,
211 [LeaveNotify] = leavenotify,
212 [Expose] = expose,
213 [KeyPress] = keypress,
214 [MappingNotify] = mappingnotify,
215 [MapRequest] = maprequest,
216 [PropertyNotify] = propertynotify,
217 [UnmapNotify] = unmapnotify
218 };
219 Atom wmatom[WMLast], netatom[NetLast];
220 Bool otherwm, readin;
221 Bool running = True;
222 Bool selscreen = True;
223 Client *clients = NULL;
224 Client *sel = NULL;
225 Client *stack = NULL;
226 Cursor cursor[CurLast];
227 Display *dpy;
228 DC dc = {0};
229 Window barwin, root;
230 Regs *regs = NULL;
231
232 /* configuration, allows nested code to access above variables */
233 #include "config.h"
234
235 /* function implementations */
236 void
237 applyrules(Client *c) {
238 static char buf[512];
239 unsigned int i, j;
240 regmatch_t tmp;
241 Bool matched = False;
242 XClassHint ch = { 0 };
243
244 /* rule matching */
245 XGetClassHint(dpy, c->win, &ch);
246 snprintf(buf, sizeof buf, "%s:%s:%s",
247 ch.res_class ? ch.res_class : "",
248 ch.res_name ? ch.res_name : "", c->name);
249 for(i = 0; i < nrules; i++)
250 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
251 c->isfloating = rules[i].isfloating;
252 for(j = 0; regs[i].tagregex && j < NTAGS; j++) {
253 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
254 matched = True;
255 c->tags[j] = True;
256 }
257 }
258 }
259 if(ch.res_class)
260 XFree(ch.res_class);
261 if(ch.res_name)
262 XFree(ch.res_name);
263 if(!matched)
264 memcpy(c->tags, seltags, sizeof seltags);
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((ISTILE) && !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 }
396
397 void
398 compileregs(void) {
399 unsigned int i;
400 regex_t *reg;
401
402 if(regs)
403 return;
404 nrules = sizeof rules / sizeof rules[0];
405 regs = emallocz(nrules * sizeof(Regs));
406 for(i = 0; i < nrules; i++) {
407 if(rules[i].prop) {
408 reg = emallocz(sizeof(regex_t));
409 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
410 free(reg);
411 else
412 regs[i].propregex = reg;
413 }
414 if(rules[i].tags) {
415 reg = emallocz(sizeof(regex_t));
416 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
417 free(reg);
418 else
419 regs[i].tagregex = reg;
420 }
421 }
422 }
423
424 void
425 configure(Client *c) {
426 XConfigureEvent ce;
427
428 ce.type = ConfigureNotify;
429 ce.display = dpy;
430 ce.event = c->win;
431 ce.window = c->win;
432 ce.x = c->x;
433 ce.y = c->y;
434 ce.width = c->w;
435 ce.height = c->h;
436 ce.border_width = c->border;
437 ce.above = None;
438 ce.override_redirect = False;
439 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
440 }
441
442 void
443 configurenotify(XEvent *e) {
444 XConfigureEvent *ev = &e->xconfigure;
445
446 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
447 sw = ev->width;
448 sh = ev->height;
449 XFreePixmap(dpy, dc.drawable);
450 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
451 XResizeWindow(dpy, barwin, sw, bh);
452 updatebarpos();
453 arrange();
454 }
455 }
456
457 void
458 configurerequest(XEvent *e) {
459 Client *c;
460 XConfigureRequestEvent *ev = &e->xconfigurerequest;
461 XWindowChanges wc;
462
463 if((c = getclient(ev->window))) {
464 c->ismax = False;
465 if(ev->value_mask & CWBorderWidth)
466 c->border = ev->border_width;
467 if(c->isfixed || c->isfloating || isarrange(floating)) {
468 if(ev->value_mask & CWX)
469 c->x = ev->x;
470 if(ev->value_mask & CWY)
471 c->y = ev->y;
472 if(ev->value_mask & CWWidth)
473 c->w = ev->width;
474 if(ev->value_mask & CWHeight)
475 c->h = ev->height;
476 if((c->x + c->w) > sw && c->isfloating)
477 c->x = sw / 2 - c->w / 2; /* center in x direction */
478 if((c->y + c->h) > sh && c->isfloating)
479 c->y = sh / 2 - c->h / 2; /* center in y direction */
480 if((ev->value_mask & (CWX | CWY))
481 && !(ev->value_mask & (CWWidth | CWHeight)))
482 configure(c);
483 if(isvisible(c))
484 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
485 }
486 else
487 configure(c);
488 }
489 else {
490 wc.x = ev->x;
491 wc.y = ev->y;
492 wc.width = ev->width;
493 wc.height = ev->height;
494 wc.border_width = ev->border_width;
495 wc.sibling = ev->above;
496 wc.stack_mode = ev->detail;
497 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
498 }
499 XSync(dpy, False);
500 }
501
502 void
503 destroynotify(XEvent *e) {
504 Client *c;
505 XDestroyWindowEvent *ev = &e->xdestroywindow;
506
507 if((c = getclient(ev->window)))
508 unmanage(c);
509 }
510
511 void
512 detach(Client *c) {
513 if(c->prev)
514 c->prev->next = c->next;
515 if(c->next)
516 c->next->prev = c->prev;
517 if(c == clients)
518 clients = c->next;
519 c->next = c->prev = NULL;
520 }
521
522 void
523 detachstack(Client *c) {
524 Client **tc;
525
526 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
527 *tc = c->snext;
528 }
529
530 void
531 drawbar(void) {
532 int i, x;
533
534 dc.x = dc.y = 0;
535 for(i = 0; i < NTAGS; i++) {
536 dc.w = textw(tags[i]);
537 if(seltags[i]) {
538 drawtext(tags[i], dc.sel);
539 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
540 }
541 else {
542 drawtext(tags[i], dc.norm);
543 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
544 }
545 dc.x += dc.w;
546 }
547 dc.w = blw;
548 drawtext(layouts[ltidx].symbol, dc.norm);
549 x = dc.x + dc.w;
550 dc.w = textw(stext);
551 dc.x = sw - dc.w;
552 if(dc.x < x) {
553 dc.x = x;
554 dc.w = sw - x;
555 }
556 drawtext(stext, dc.norm);
557 if((dc.w = dc.x - x) > bh) {
558 dc.x = x;
559 if(sel) {
560 drawtext(sel->name, dc.sel);
561 drawsquare(sel->ismax, sel->isfloating, dc.sel);
562 }
563 else
564 drawtext(NULL, dc.norm);
565 }
566 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
567 XSync(dpy, False);
568 }
569
570 void
571 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
572 int x;
573 XGCValues gcv;
574 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
575
576 gcv.foreground = col[ColFG];
577 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
578 x = (dc.font.ascent + dc.font.descent + 2) / 4;
579 r.x = dc.x + 1;
580 r.y = dc.y + 1;
581 if(filled) {
582 r.width = r.height = x + 1;
583 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
584 }
585 else if(empty) {
586 r.width = r.height = x;
587 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
588 }
589 }
590
591 void
592 drawtext(const char *text, unsigned long col[ColLast]) {
593 int x, y, w, h;
594 static char buf[256];
595 unsigned int len, olen;
596 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
597
598 XSetForeground(dpy, dc.gc, col[ColBG]);
599 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
600 if(!text)
601 return;
602 w = 0;
603 olen = len = strlen(text);
604 if(len >= sizeof buf)
605 len = sizeof buf - 1;
606 memcpy(buf, text, len);
607 buf[len] = 0;
608 h = dc.font.ascent + dc.font.descent;
609 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
610 x = dc.x + (h / 2);
611 /* shorten text if necessary */
612 while(len && (w = textnw(buf, len)) > dc.w - h)
613 buf[--len] = 0;
614 if(len < olen) {
615 if(len > 1)
616 buf[len - 1] = '.';
617 if(len > 2)
618 buf[len - 2] = '.';
619 if(len > 3)
620 buf[len - 3] = '.';
621 }
622 if(w > dc.w)
623 return; /* too long */
624 XSetForeground(dpy, dc.gc, col[ColFG]);
625 if(dc.font.set)
626 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
627 else
628 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
629 }
630
631 void *
632 emallocz(unsigned int size) {
633 void *res = calloc(1, size);
634
635 if(!res)
636 eprint("fatal: could not malloc() %u bytes\n", size);
637 return res;
638 }
639
640 void
641 enternotify(XEvent *e) {
642 Client *c;
643 XCrossingEvent *ev = &e->xcrossing;
644
645 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
646 return;
647 if((c = getclient(ev->window)))
648 focus(c);
649 else if(ev->window == root) {
650 selscreen = True;
651 focus(NULL);
652 }
653 }
654
655 void
656 eprint(const char *errstr, ...) {
657 va_list ap;
658
659 va_start(ap, errstr);
660 vfprintf(stderr, errstr, ap);
661 va_end(ap);
662 exit(EXIT_FAILURE);
663 }
664
665 void
666 expose(XEvent *e) {
667 XExposeEvent *ev = &e->xexpose;
668
669 if(0 == ev->count) {
670 if(barwin == ev->window)
671 drawbar();
672 }
673 }
674
675 void
676 floating(void) { /* default floating layout */
677 Client *c;
678
679 for(c = clients; c; c = c->next)
680 if(isvisible(c))
681 resize(c, c->x, c->y, c->w, c->h, True);
682 }
683
684 void
685 focus(Client *c) {
686 if((!c && selscreen) || (c && !isvisible(c)))
687 for(c = stack; c && !isvisible(c); c = c->snext);
688 if(sel && sel != c) {
689 grabbuttons(sel, False);
690 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
691 }
692 if(c) {
693 detachstack(c);
694 attachstack(c);
695 grabbuttons(c, True);
696 }
697 sel = c;
698 drawbar();
699 if(!selscreen)
700 return;
701 if(c) {
702 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
703 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
704 }
705 else
706 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
707 }
708
709 void
710 focusnext(const char *arg) {
711 Client *c;
712
713 if(!sel)
714 return;
715 for(c = sel->next; c && !isvisible(c); c = c->next);
716 if(!c)
717 for(c = clients; c && !isvisible(c); c = c->next);
718 if(c) {
719 focus(c);
720 restack();
721 }
722 }
723
724 void
725 focusprev(const char *arg) {
726 Client *c;
727
728 if(!sel)
729 return;
730 for(c = sel->prev; c && !isvisible(c); c = c->prev);
731 if(!c) {
732 for(c = clients; c && c->next; c = c->next);
733 for(; c && !isvisible(c); c = c->prev);
734 }
735 if(c) {
736 focus(c);
737 restack();
738 }
739 }
740
741 Client *
742 getclient(Window w) {
743 Client *c;
744
745 for(c = clients; c && c->win != w; c = c->next);
746 return c;
747 }
748
749 unsigned long
750 getcolor(const char *colstr) {
751 Colormap cmap = DefaultColormap(dpy, screen);
752 XColor color;
753
754 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
755 eprint("error, cannot allocate color '%s'\n", colstr);
756 return color.pixel;
757 }
758
759 long
760 getstate(Window w) {
761 int format, status;
762 long result = -1;
763 unsigned char *p = NULL;
764 unsigned long n, extra;
765 Atom real;
766
767 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
768 &real, &format, &n, &extra, (unsigned char **)&p);
769 if(status != Success)
770 return -1;
771 if(n != 0)
772 result = *p;
773 XFree(p);
774 return result;
775 }
776
777 Bool
778 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
779 char **list = NULL;
780 int n;
781 XTextProperty name;
782
783 if(!text || 0 == size)
784 return False;
785 text[0] = '\0';
786 XGetTextProperty(dpy, w, &name, atom);
787 if(!name.nitems)
788 return False;
789 if(name.encoding == XA_STRING)
790 strncpy(text, (char *)name.value, size - 1);
791 else {
792 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
793 && n > 0 && *list)
794 {
795 strncpy(text, *list, size - 1);
796 XFreeStringList(list);
797 }
798 }
799 text[size - 1] = '\0';
800 XFree(name.value);
801 return True;
802 }
803
804 void
805 grabbuttons(Client *c, Bool focused) {
806 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
807
808 if(focused) {
809 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
810 GrabModeAsync, GrabModeSync, None, None);
811 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
812 GrabModeAsync, GrabModeSync, None, None);
813 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
814 GrabModeAsync, GrabModeSync, None, None);
815 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
816 GrabModeAsync, GrabModeSync, None, None);
817
818 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
819 GrabModeAsync, GrabModeSync, None, None);
820 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
821 GrabModeAsync, GrabModeSync, None, None);
822 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
823 GrabModeAsync, GrabModeSync, None, None);
824 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
825 GrabModeAsync, GrabModeSync, None, None);
826
827 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
828 GrabModeAsync, GrabModeSync, None, None);
829 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
830 GrabModeAsync, GrabModeSync, None, None);
831 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
832 GrabModeAsync, GrabModeSync, None, None);
833 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
834 GrabModeAsync, GrabModeSync, None, None);
835 }
836 else
837 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
838 GrabModeAsync, GrabModeSync, None, None);
839 }
840
841 unsigned int
842 idxoftag(const char *tag) {
843 unsigned int i;
844
845 for(i = 0; (i < NTAGS) && (tags[i] != tag); i++);
846 return (i < NTAGS) ? i : 0;
847 }
848
849 void
850 initfont(const char *fontstr) {
851 char *def, **missing;
852 int i, n;
853
854 missing = NULL;
855 if(dc.font.set)
856 XFreeFontSet(dpy, dc.font.set);
857 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
858 if(missing) {
859 while(n--)
860 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
861 XFreeStringList(missing);
862 }
863 if(dc.font.set) {
864 XFontSetExtents *font_extents;
865 XFontStruct **xfonts;
866 char **font_names;
867 dc.font.ascent = dc.font.descent = 0;
868 font_extents = XExtentsOfFontSet(dc.font.set);
869 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
870 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
871 if(dc.font.ascent < (*xfonts)->ascent)
872 dc.font.ascent = (*xfonts)->ascent;
873 if(dc.font.descent < (*xfonts)->descent)
874 dc.font.descent = (*xfonts)->descent;
875 xfonts++;
876 }
877 }
878 else {
879 if(dc.font.xfont)
880 XFreeFont(dpy, dc.font.xfont);
881 dc.font.xfont = NULL;
882 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
883 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
884 eprint("error, cannot load font: '%s'\n", fontstr);
885 dc.font.ascent = dc.font.xfont->ascent;
886 dc.font.descent = dc.font.xfont->descent;
887 }
888 dc.font.height = dc.font.ascent + dc.font.descent;
889 }
890
891 Bool
892 isarrange(void (*func)())
893 {
894 return func == layouts[ltidx].arrange;
895 }
896
897 Bool
898 isoccupied(unsigned int t) {
899 Client *c;
900
901 for(c = clients; c; c = c->next)
902 if(c->tags[t])
903 return True;
904 return False;
905 }
906
907 Bool
908 isprotodel(Client *c) {
909 int i, n;
910 Atom *protocols;
911 Bool ret = False;
912
913 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
914 for(i = 0; !ret && i < n; i++)
915 if(protocols[i] == wmatom[WMDelete])
916 ret = True;
917 XFree(protocols);
918 }
919 return ret;
920 }
921
922 Bool
923 isvisible(Client *c) {
924 unsigned int i;
925
926 for(i = 0; i < NTAGS; i++)
927 if(c->tags[i] && seltags[i])
928 return True;
929 return False;
930 }
931
932 void
933 keypress(XEvent *e) {
934 KEYS
935 unsigned int len = sizeof keys / sizeof keys[0];
936 unsigned int i;
937 KeyCode code;
938 KeySym keysym;
939 XKeyEvent *ev;
940
941 if(!e) { /* grabkeys */
942 XUngrabKey(dpy, AnyKey, AnyModifier, root);
943 for(i = 0; i < len; i++) {
944 code = XKeysymToKeycode(dpy, keys[i].keysym);
945 XGrabKey(dpy, code, keys[i].mod, root, True,
946 GrabModeAsync, GrabModeAsync);
947 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
948 GrabModeAsync, GrabModeAsync);
949 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
950 GrabModeAsync, GrabModeAsync);
951 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
952 GrabModeAsync, GrabModeAsync);
953 }
954 return;
955 }
956 ev = &e->xkey;
957 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
958 for(i = 0; i < len; i++)
959 if(keysym == keys[i].keysym
960 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
961 {
962 if(keys[i].func)
963 keys[i].func(keys[i].arg);
964 }
965 }
966
967 void
968 killclient(const char *arg) {
969 XEvent ev;
970
971 if(!sel)
972 return;
973 if(isprotodel(sel)) {
974 ev.type = ClientMessage;
975 ev.xclient.window = sel->win;
976 ev.xclient.message_type = wmatom[WMProtocols];
977 ev.xclient.format = 32;
978 ev.xclient.data.l[0] = wmatom[WMDelete];
979 ev.xclient.data.l[1] = CurrentTime;
980 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
981 }
982 else
983 XKillClient(dpy, sel->win);
984 }
985
986 void
987 leavenotify(XEvent *e) {
988 XCrossingEvent *ev = &e->xcrossing;
989
990 if((ev->window == root) && !ev->same_screen) {
991 selscreen = False;
992 focus(NULL);
993 }
994 }
995
996 void
997 manage(Window w, XWindowAttributes *wa) {
998 Client *c, *t = NULL;
999 Window trans;
1000 Status rettrans;
1001 XWindowChanges wc;
1002
1003 c = emallocz(sizeof(Client));
1004 c->tags = emallocz(sizeof seltags);
1005 c->win = w;
1006 c->x = wa->x;
1007 c->y = wa->y;
1008 c->w = wa->width;
1009 c->h = wa->height;
1010 c->oldborder = wa->border_width;
1011 if(c->w == sw && c->h == sh) {
1012 c->x = sx;
1013 c->y = sy;
1014 c->border = wa->border_width;
1015 }
1016 else {
1017 if(c->x + c->w + 2 * c->border > wax + waw)
1018 c->x = wax + waw - c->w - 2 * c->border;
1019 if(c->y + c->h + 2 * c->border > way + wah)
1020 c->y = way + wah - c->h - 2 * c->border;
1021 if(c->x < wax)
1022 c->x = wax;
1023 if(c->y < way)
1024 c->y = way;
1025 c->border = BORDERPX;
1026 }
1027 wc.border_width = c->border;
1028 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1029 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1030 configure(c); /* propagates border_width, if size doesn't change */
1031 updatesizehints(c);
1032 XSelectInput(dpy, w,
1033 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
1034 grabbuttons(c, False);
1035 updatetitle(c);
1036 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1037 for(t = clients; t && t->win != trans; t = t->next);
1038 if(t)
1039 memcpy(c->tags, t->tags, sizeof seltags);
1040 applyrules(c);
1041 if(!c->isfloating)
1042 c->isfloating = (rettrans == Success) || c->isfixed;
1043 attach(c);
1044 attachstack(c);
1045 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1046 ban(c);
1047 XMapWindow(dpy, c->win);
1048 setclientstate(c, NormalState);
1049 arrange();
1050 }
1051
1052 void
1053 mappingnotify(XEvent *e) {
1054 XMappingEvent *ev = &e->xmapping;
1055
1056 XRefreshKeyboardMapping(ev);
1057 if(ev->request == MappingKeyboard)
1058 keypress(NULL);
1059 }
1060
1061 void
1062 maprequest(XEvent *e) {
1063 static XWindowAttributes wa;
1064 XMapRequestEvent *ev = &e->xmaprequest;
1065
1066 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1067 return;
1068 if(wa.override_redirect)
1069 return;
1070 if(!getclient(ev->window))
1071 manage(ev->window, &wa);
1072 }
1073
1074 void
1075 movemouse(Client *c) {
1076 int x1, y1, ocx, ocy, di, nx, ny;
1077 unsigned int dui;
1078 Window dummy;
1079 XEvent ev;
1080
1081 ocx = nx = c->x;
1082 ocy = ny = c->y;
1083 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1084 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1085 return;
1086 c->ismax = False;
1087 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1088 for(;;) {
1089 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1090 switch (ev.type) {
1091 case ButtonRelease:
1092 XUngrabPointer(dpy, CurrentTime);
1093 return;
1094 case ConfigureRequest:
1095 case Expose:
1096 case MapRequest:
1097 handler[ev.type](&ev);
1098 break;
1099 case MotionNotify:
1100 XSync(dpy, False);
1101 nx = ocx + (ev.xmotion.x - x1);
1102 ny = ocy + (ev.xmotion.y - y1);
1103 if(abs(wax + nx) < SNAP)
1104 nx = wax;
1105 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1106 nx = wax + waw - c->w - 2 * c->border;
1107 if(abs(way - ny) < SNAP)
1108 ny = way;
1109 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1110 ny = way + wah - c->h - 2 * c->border;
1111 resize(c, nx, ny, c->w, c->h, False);
1112 break;
1113 }
1114 }
1115 }
1116
1117 Client *
1118 nexttiled(Client *c) {
1119 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1120 return c;
1121 }
1122
1123 void
1124 propertynotify(XEvent *e) {
1125 Client *c;
1126 Window trans;
1127 XPropertyEvent *ev = &e->xproperty;
1128
1129 if(ev->state == PropertyDelete)
1130 return; /* ignore */
1131 if((c = getclient(ev->window))) {
1132 switch (ev->atom) {
1133 default: break;
1134 case XA_WM_TRANSIENT_FOR:
1135 XGetTransientForHint(dpy, c->win, &trans);
1136 if(!c->isfloating && (c->isfloating = (NULL != getclient(trans))))
1137 arrange();
1138 break;
1139 case XA_WM_NORMAL_HINTS:
1140 updatesizehints(c);
1141 break;
1142 }
1143 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1144 updatetitle(c);
1145 if(c == sel)
1146 drawbar();
1147 }
1148 }
1149 }
1150
1151 void
1152 quit(const char *arg) {
1153 readin = running = False;
1154 }
1155
1156 void
1157 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1158 XWindowChanges wc;
1159
1160 if(sizehints) {
1161 /* set minimum possible */
1162 if (w < 1)
1163 w = 1;
1164 if (h < 1)
1165 h = 1;
1166
1167 /* temporarily remove base dimensions */
1168 w -= c->basew;
1169 h -= c->baseh;
1170
1171 /* adjust for aspect limits */
1172 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1173 if (w * c->maxay > h * c->maxax)
1174 w = h * c->maxax / c->maxay;
1175 else if (w * c->minay < h * c->minax)
1176 h = w * c->minay / c->minax;
1177 }
1178
1179 /* adjust for increment value */
1180 if(c->incw)
1181 w -= w % c->incw;
1182 if(c->inch)
1183 h -= h % c->inch;
1184
1185 /* restore base dimensions */
1186 w += c->basew;
1187 h += c->baseh;
1188
1189 if(c->minw > 0 && w < c->minw)
1190 w = c->minw;
1191 if(c->minh > 0 && h < c->minh)
1192 h = c->minh;
1193 if(c->maxw > 0 && w > c->maxw)
1194 w = c->maxw;
1195 if(c->maxh > 0 && h > c->maxh)
1196 h = c->maxh;
1197 }
1198 if(w <= 0 || h <= 0)
1199 return;
1200 /* offscreen appearance fixes */
1201 if(x > sw)
1202 x = sw - w - 2 * c->border;
1203 if(y > sh)
1204 y = sh - h - 2 * c->border;
1205 if(x + w + 2 * c->border < sx)
1206 x = sx;
1207 if(y + h + 2 * c->border < sy)
1208 y = sy;
1209 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1210 c->x = wc.x = x;
1211 c->y = wc.y = y;
1212 c->w = wc.width = w;
1213 c->h = wc.height = h;
1214 wc.border_width = c->border;
1215 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1216 configure(c);
1217 XSync(dpy, False);
1218 }
1219 }
1220
1221 void
1222 resizemouse(Client *c) {
1223 int ocx, ocy;
1224 int nw, nh;
1225 XEvent ev;
1226
1227 ocx = c->x;
1228 ocy = c->y;
1229 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1230 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1231 return;
1232 c->ismax = False;
1233 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1234 for(;;) {
1235 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1236 switch(ev.type) {
1237 case ButtonRelease:
1238 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1239 c->w + c->border - 1, c->h + c->border - 1);
1240 XUngrabPointer(dpy, CurrentTime);
1241 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1242 return;
1243 case ConfigureRequest:
1244 case Expose:
1245 case MapRequest:
1246 handler[ev.type](&ev);
1247 break;
1248 case MotionNotify:
1249 XSync(dpy, False);
1250 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1251 nw = 1;
1252 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1253 nh = 1;
1254 resize(c, c->x, c->y, nw, nh, True);
1255 break;
1256 }
1257 }
1258 }
1259
1260 void
1261 restack(void) {
1262 Client *c;
1263 XEvent ev;
1264 XWindowChanges wc;
1265
1266 drawbar();
1267 if(!sel)
1268 return;
1269 if(sel->isfloating || isarrange(floating))
1270 XRaiseWindow(dpy, sel->win);
1271 if(!isarrange(floating)) {
1272 wc.stack_mode = Below;
1273 wc.sibling = barwin;
1274 if(!sel->isfloating) {
1275 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1276 wc.sibling = sel->win;
1277 }
1278 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1279 if(c == sel)
1280 continue;
1281 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1282 wc.sibling = c->win;
1283 }
1284 }
1285 XSync(dpy, False);
1286 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1287 }
1288
1289 void
1290 run(void) {
1291 char *p;
1292 int r, xfd;
1293 fd_set rd;
1294 XEvent ev;
1295
1296 /* main event loop, also reads status text from stdin */
1297 XSync(dpy, False);
1298 xfd = ConnectionNumber(dpy);
1299 readin = True;
1300 while(running) {
1301 FD_ZERO(&rd);
1302 if(readin)
1303 FD_SET(STDIN_FILENO, &rd);
1304 FD_SET(xfd, &rd);
1305 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1306 if(errno == EINTR)
1307 continue;
1308 eprint("select failed\n");
1309 }
1310 if(FD_ISSET(STDIN_FILENO, &rd)) {
1311 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1312 case -1:
1313 strncpy(stext, strerror(errno), sizeof stext - 1);
1314 stext[sizeof stext - 1] = '\0';
1315 readin = False;
1316 break;
1317 case 0:
1318 strncpy(stext, "EOF", 4);
1319 readin = False;
1320 break;
1321 default:
1322 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1323 for(; p >= stext && *p != '\n'; --p);
1324 if(p > stext)
1325 strncpy(stext, p + 1, sizeof stext);
1326 }
1327 drawbar();
1328 }
1329 while(XPending(dpy)) {
1330 XNextEvent(dpy, &ev);
1331 if(handler[ev.type])
1332 (handler[ev.type])(&ev); /* call handler */
1333 }
1334 }
1335 }
1336
1337 void
1338 scan(void) {
1339 unsigned int i, num;
1340 Window *wins, d1, d2;
1341 XWindowAttributes wa;
1342
1343 wins = NULL;
1344 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1345 for(i = 0; i < num; i++) {
1346 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1347 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1348 continue;
1349 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1350 manage(wins[i], &wa);
1351 }
1352 for(i = 0; i < num; i++) { /* now the transients */
1353 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1354 continue;
1355 if(XGetTransientForHint(dpy, wins[i], &d1)
1356 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1357 manage(wins[i], &wa);
1358 }
1359 }
1360 if(wins)
1361 XFree(wins);
1362 }
1363
1364 void
1365 setclientstate(Client *c, long state) {
1366 long data[] = {state, None};
1367
1368 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1369 PropModeReplace, (unsigned char *)data, 2);
1370 }
1371
1372 void
1373 setlayout(const char *arg) {
1374 unsigned int i;
1375
1376 if(!arg) {
1377 if(++ltidx == nlayouts)
1378 ltidx = 0;;
1379 }
1380 else {
1381 for(i = 0; i < nlayouts; i++)
1382 if(!strcmp(arg, layouts[i].symbol))
1383 break;
1384 if(i == nlayouts)
1385 return;
1386 ltidx = i;
1387 }
1388 if(sel)
1389 arrange();
1390 else
1391 drawbar();
1392 }
1393
1394 void
1395 setmwfact(const char *arg) {
1396 double delta;
1397
1398 if(!(ISTILE))
1399 return;
1400 /* arg handling, manipulate mwfact */
1401 if(NULL == arg)
1402 mwfact = MWFACT;
1403 else if(1 == sscanf(arg, "%lf", &delta)) {
1404 if(arg[0] == '+' || arg[0] == '-')
1405 mwfact += delta;
1406 else
1407 mwfact = delta;
1408 if(mwfact < 0.1)
1409 mwfact = 0.1;
1410 else if(mwfact > 0.9)
1411 mwfact = 0.9;
1412 }
1413 arrange();
1414 }
1415
1416 void
1417 setup(void) {
1418 int d;
1419 unsigned int i, j, mask;
1420 Window w;
1421 XModifierKeymap *modmap;
1422 XSetWindowAttributes wa;
1423
1424 /* init atoms */
1425 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1426 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1427 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1428 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1429 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1430 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1431 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1432 PropModeReplace, (unsigned char *) netatom, NetLast);
1433
1434 /* init cursors */
1435 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1436 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1437 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1438
1439 /* init geometry */
1440 sx = sy = 0;
1441 sw = DisplayWidth(dpy, screen);
1442 sh = DisplayHeight(dpy, screen);
1443
1444 /* init modifier map */
1445 modmap = XGetModifierMapping(dpy);
1446 for(i = 0; i < 8; i++)
1447 for(j = 0; j < modmap->max_keypermod; j++) {
1448 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1449 == XKeysymToKeycode(dpy, XK_Num_Lock))
1450 numlockmask = (1 << i);
1451 }
1452 XFreeModifiermap(modmap);
1453
1454 /* select for events */
1455 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1456 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1457 wa.cursor = cursor[CurNormal];
1458 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1459 XSelectInput(dpy, root, wa.event_mask);
1460
1461 /* grab keys */
1462 keypress(NULL);
1463
1464 /* init tags */
1465 compileregs();
1466
1467 /* init appearance */
1468 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1469 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1470 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1471 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1472 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1473 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1474 initfont(FONT);
1475 dc.h = bh = dc.font.height + 2;
1476
1477 /* init layouts */
1478 mwfact = MWFACT;
1479 nlayouts = sizeof layouts / sizeof layouts[0];
1480 for(blw = i = 0; i < nlayouts; i++) {
1481 j = textw(layouts[i].symbol);
1482 if(j > blw)
1483 blw = j;
1484 }
1485
1486 /* init bar */
1487 bpos = BARPOS;
1488 wa.override_redirect = 1;
1489 wa.background_pixmap = ParentRelative;
1490 wa.event_mask = ButtonPressMask | ExposureMask;
1491 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1492 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1493 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1494 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1495 updatebarpos();
1496 XMapRaised(dpy, barwin);
1497 strcpy(stext, "dwm-"VERSION);
1498 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1499 dc.gc = XCreateGC(dpy, root, 0, 0);
1500 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1501 if(!dc.font.set)
1502 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1503
1504 /* multihead support */
1505 selscreen = XQueryPointer(dpy, root, &w, &w, &d, &d, &d, &d, &mask);
1506 }
1507
1508 void
1509 spawn(const char *arg) {
1510 static char *shell = NULL;
1511
1512 if(!shell && !(shell = getenv("SHELL")))
1513 shell = "/bin/sh";
1514 if(!arg)
1515 return;
1516 /* The double-fork construct avoids zombie processes and keeps the code
1517 * clean from stupid signal handlers. */
1518 if(0 == fork()) {
1519 if(0 == fork()) {
1520 if(dpy)
1521 close(ConnectionNumber(dpy));
1522 setsid();
1523 execl(shell, shell, "-c", arg, (char *)NULL);
1524 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1525 perror(" failed");
1526 }
1527 exit(0);
1528 }
1529 wait(0);
1530 }
1531
1532 void
1533 tag(const char *arg) {
1534 unsigned int i;
1535
1536 if(!sel)
1537 return;
1538 for(i = 0; i < NTAGS; i++)
1539 sel->tags[i] = (NULL == arg);
1540 sel->tags[idxoftag(arg)] = True;
1541 arrange();
1542 }
1543
1544 unsigned int
1545 textnw(const char *text, unsigned int len) {
1546 XRectangle r;
1547
1548 if(dc.font.set) {
1549 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1550 return r.width;
1551 }
1552 return XTextWidth(dc.font.xfont, text, len);
1553 }
1554
1555 unsigned int
1556 textw(const char *text) {
1557 return textnw(text, strlen(text)) + dc.font.height;
1558 }
1559
1560 void
1561 tile(void) {
1562 unsigned int i, n, nx, ny, nw, nh, mw, th;
1563 Client *c, *mc;
1564
1565 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1566 n++;
1567
1568 /* window geoms */
1569 mw = (n == 1) ? waw : mwfact * waw;
1570 th = (n > 1) ? wah / (n - 1) : 0;
1571 if(n > 1 && th < bh)
1572 th = wah;
1573
1574 nx = wax;
1575 ny = way;
1576 nw = 0; /* gcc stupidity requires this */
1577 for(i = 0, c = mc = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1578 c->ismax = False;
1579 if(0 == i) { /* master */
1580 nw = mw - 2 * c->border;
1581 nh = wah - 2 * c->border;
1582 }
1583 else { /* tile window */
1584 if(i == 1) {
1585 ny = way;
1586 nx += mc->w + 2 * mc->border;
1587 nw = waw - nx - 2 * c->border;
1588 }
1589 if(i + 1 == n) /* remainder */
1590 nh = (way + wah) - ny - 2 * c->border;
1591 else
1592 nh = th - 2 * c->border;
1593 }
1594 resize(c, nx, ny, nw, nh, True);
1595 if((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw))
1596 /* client doesn't accept size constraints */
1597 resize(c, nx, ny, nw, nh, False);
1598 if(n > 1 && th != wah)
1599 ny = c->y + c->h + 2 * c->border;
1600 }
1601 }
1602
1603 void
1604 togglebar(const char *arg) {
1605 if(bpos == BarOff)
1606 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1607 else
1608 bpos = BarOff;
1609 updatebarpos();
1610 arrange();
1611 }
1612
1613 void
1614 togglefloating(const char *arg) {
1615 if(!sel)
1616 return;
1617 sel->isfloating = !sel->isfloating;
1618 if(sel->isfloating)
1619 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1620 arrange();
1621 }
1622
1623 void
1624 togglemax(const char *arg) {
1625 XEvent ev;
1626
1627 if(!sel || sel->isfixed)
1628 return;
1629 if((sel->ismax = !sel->ismax)) {
1630 if(isarrange(floating) || sel->isfloating)
1631 sel->wasfloating = True;
1632 else {
1633 togglefloating(NULL);
1634 sel->wasfloating = False;
1635 }
1636 sel->rx = sel->x;
1637 sel->ry = sel->y;
1638 sel->rw = sel->w;
1639 sel->rh = sel->h;
1640 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1641 }
1642 else {
1643 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1644 if(!sel->wasfloating)
1645 togglefloating(NULL);
1646 }
1647 drawbar();
1648 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1649 }
1650
1651 void
1652 toggletag(const char *arg) {
1653 unsigned int i, j;
1654
1655 if(!sel)
1656 return;
1657 i = idxoftag(arg);
1658 sel->tags[i] = !sel->tags[i];
1659 for(j = 0; j < NTAGS && !sel->tags[j]; j++);
1660 if(j == NTAGS)
1661 sel->tags[i] = True; /* at least one tag must be enabled */
1662 arrange();
1663 }
1664
1665 void
1666 toggleview(const char *arg) {
1667 unsigned int i, j;
1668
1669 i = idxoftag(arg);
1670 seltags[i] = !seltags[i];
1671 for(j = 0; j < NTAGS && !seltags[j]; j++);
1672 if(j == NTAGS)
1673 seltags[i] = True; /* at least one tag must be viewed */
1674 arrange();
1675 }
1676
1677 void
1678 unban(Client *c) {
1679 if(!c->isbanned)
1680 return;
1681 XMoveWindow(dpy, c->win, c->x, c->y);
1682 c->isbanned = False;
1683 }
1684
1685 void
1686 unmanage(Client *c) {
1687 XWindowChanges wc;
1688
1689 wc.border_width = c->oldborder;
1690 /* The server grab construct avoids race conditions. */
1691 XGrabServer(dpy);
1692 XSetErrorHandler(xerrordummy);
1693 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1694 detach(c);
1695 detachstack(c);
1696 if(sel == c)
1697 focus(NULL);
1698 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1699 setclientstate(c, WithdrawnState);
1700 free(c->tags);
1701 free(c);
1702 XSync(dpy, False);
1703 XSetErrorHandler(xerror);
1704 XUngrabServer(dpy);
1705 arrange();
1706 }
1707
1708 void
1709 unmapnotify(XEvent *e) {
1710 Client *c;
1711 XUnmapEvent *ev = &e->xunmap;
1712
1713 if((c = getclient(ev->window)))
1714 unmanage(c);
1715 }
1716
1717 void
1718 updatebarpos(void) {
1719 XEvent ev;
1720
1721 wax = sx;
1722 way = sy;
1723 wah = sh;
1724 waw = sw;
1725 switch(bpos) {
1726 default:
1727 wah -= bh;
1728 way += bh;
1729 XMoveWindow(dpy, barwin, sx, sy);
1730 break;
1731 case BarBot:
1732 wah -= bh;
1733 XMoveWindow(dpy, barwin, sx, sy + wah);
1734 break;
1735 case BarOff:
1736 XMoveWindow(dpy, barwin, sx, sy - bh);
1737 break;
1738 }
1739 XSync(dpy, False);
1740 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1741 }
1742
1743 void
1744 updatesizehints(Client *c) {
1745 long msize;
1746 XSizeHints size;
1747
1748 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1749 size.flags = PSize;
1750 c->flags = size.flags;
1751 if(c->flags & PBaseSize) {
1752 c->basew = size.base_width;
1753 c->baseh = size.base_height;
1754 }
1755 else if(c->flags & PMinSize) {
1756 c->basew = size.min_width;
1757 c->baseh = size.min_height;
1758 }
1759 else
1760 c->basew = c->baseh = 0;
1761 if(c->flags & PResizeInc) {
1762 c->incw = size.width_inc;
1763 c->inch = size.height_inc;
1764 }
1765 else
1766 c->incw = c->inch = 0;
1767 if(c->flags & PMaxSize) {
1768 c->maxw = size.max_width;
1769 c->maxh = size.max_height;
1770 }
1771 else
1772 c->maxw = c->maxh = 0;
1773 if(c->flags & PMinSize) {
1774 c->minw = size.min_width;
1775 c->minh = size.min_height;
1776 }
1777 else if(c->flags & PBaseSize) {
1778 c->minw = size.base_width;
1779 c->minh = size.base_height;
1780 }
1781 else
1782 c->minw = c->minh = 0;
1783 if(c->flags & PAspect) {
1784 c->minax = size.min_aspect.x;
1785 c->maxax = size.max_aspect.x;
1786 c->minay = size.min_aspect.y;
1787 c->maxay = size.max_aspect.y;
1788 }
1789 else
1790 c->minax = c->maxax = c->minay = c->maxay = 0;
1791 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1792 && c->maxw == c->minw && c->maxh == c->minh);
1793 }
1794
1795 void
1796 updatetitle(Client *c) {
1797 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1798 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1799 }
1800
1801 /* There's no way to check accesses to destroyed windows, thus those cases are
1802 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1803 * default error handler, which may call exit. */
1804 int
1805 xerror(Display *dpy, XErrorEvent *ee) {
1806 if(ee->error_code == BadWindow
1807 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1808 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1809 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1810 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1811 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1812 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1813 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1814 return 0;
1815 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1816 ee->request_code, ee->error_code);
1817 return xerrorxlib(dpy, ee); /* may call exit */
1818 }
1819
1820 int
1821 xerrordummy(Display *dsply, XErrorEvent *ee) {
1822 return 0;
1823 }
1824
1825 /* Startup Error handler to check if another window manager
1826 * is already running. */
1827 int
1828 xerrorstart(Display *dsply, XErrorEvent *ee) {
1829 otherwm = True;
1830 return -1;
1831 }
1832
1833 void
1834 view(const char *arg) {
1835 unsigned int i;
1836
1837 memcpy(prevtags, seltags, sizeof seltags);
1838 for(i = 0; i < NTAGS; i++)
1839 seltags[i] = (NULL == arg);
1840 seltags[idxoftag(arg)] = True;
1841 arrange();
1842 }
1843
1844 void
1845 viewprevtag(const char *arg) {
1846 static Bool tmptags[sizeof tags / sizeof tags[0]];
1847
1848 memcpy(tmptags, seltags, sizeof seltags);
1849 memcpy(seltags, prevtags, sizeof seltags);
1850 memcpy(prevtags, tmptags, sizeof seltags);
1851 arrange();
1852 }
1853
1854 void
1855 zoom(const char *arg) {
1856 Client *c;
1857
1858 if(!sel || !(ISTILE) || sel->isfloating)
1859 return;
1860 if((c = sel) == nexttiled(clients))
1861 if(!(c = nexttiled(c->next)))
1862 return;
1863 detach(c);
1864 attach(c);
1865 focus(c);
1866 arrange();
1867 }
1868
1869 int
1870 main(int argc, char *argv[]) {
1871 if(argc == 2 && !strcmp("-v", argv[1]))
1872 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1873 else if(argc != 1)
1874 eprint("usage: dwm [-v]\n");
1875
1876 setlocale(LC_CTYPE, "");
1877 if(!(dpy = XOpenDisplay(0)))
1878 eprint("dwm: cannot open display\n");
1879 screen = DefaultScreen(dpy);
1880 root = RootWindow(dpy, screen);
1881
1882 checkotherwm();
1883 setup();
1884 drawbar();
1885 scan();
1886 run();
1887 cleanup();
1888
1889 XCloseDisplay(dpy);
1890 return 0;
1891 }