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[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains an array of Bools of the same size as the
20 * global tags array to indicate the tags of a client. 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 the config.h
25 * file. These arrays are kept static in event.o and tag.o respectively,
26 * because no other part of dwm needs access to them. The current layout is
27 * represented by the lt pointer.
28 *
29 * To understand everything else, start reading main().
30 */
31 #include <errno.h>
32 #include <locale.h>
33 #include <regex.h>
34 #include <stdarg.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39 #include <sys/select.h>
40 #include <sys/wait.h>
41 #include <X11/cursorfont.h>
42 #include <X11/keysym.h>
43 #include <X11/Xatom.h>
44 #include <X11/Xlib.h>
45 #include <X11/Xproto.h>
46 #include <X11/Xutil.h>
47
48 /* macros */
49 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
50 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
51 #define MOUSEMASK (BUTTONMASK | PointerMotionMask)
52
53 /* enums */
54 enum { BarTop, BarBot, BarOff }; /* bar position */
55 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
56 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
57 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
58 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
59
60 /* typedefs */
61 typedef struct Client Client;
62 struct Client {
63 char name[256];
64 int x, y, w, h;
65 int rx, ry, rw, rh; /* revert geometry */
66 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
67 int minax, maxax, minay, maxay;
68 long flags;
69 unsigned int border, oldborder;
70 Bool isbanned, isfixed, ismax, isfloating;
71 Bool *tags;
72 Client *next;
73 Client *prev;
74 Client *snext;
75 Window win;
76 };
77
78 typedef struct {
79 int x, y, w, h;
80 unsigned long norm[ColLast];
81 unsigned long sel[ColLast];
82 Drawable drawable;
83 GC gc;
84 struct {
85 int ascent;
86 int descent;
87 int height;
88 XFontSet set;
89 XFontStruct *xfont;
90 } font;
91 } DC; /* draw context */
92
93 typedef struct {
94 unsigned long mod;
95 KeySym keysym;
96 void (*func)(const char *arg);
97 const char *arg;
98 } Key;
99
100 typedef struct {
101 const char *symbol;
102 void (*arrange)(void);
103 } Layout;
104
105 typedef struct {
106 const char *prop;
107 const char *tags;
108 Bool isfloating;
109 } Rule;
110
111 typedef struct {
112 regex_t *propregex;
113 regex_t *tagregex;
114 } Regs;
115
116 /* forward declarations */
117 static void applyrules(Client *c);
118 static void arrange(void);
119 static void attach(Client *c);
120 static void attachstack(Client *c);
121 static void ban(Client *c);
122 static void buttonpress(XEvent *e);
123 static void checkotherwm(void);
124 static void cleanup(void);
125 static void compileregs(void);
126 static void configure(Client *c);
127 static void configurenotify(XEvent *e);
128 static void configurerequest(XEvent *e);
129 static void destroynotify(XEvent *e);
130 static void detach(Client *c);
131 static void detachstack(Client *c);
132 static void drawbar(void);
133 static void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
134 static void drawtext(const char *text, unsigned long col[ColLast]);
135 static void *emallocz(unsigned int size);
136 static void enternotify(XEvent *e);
137 static void eprint(const char *errstr, ...);
138 static void expose(XEvent *e);
139 static void floating(void); /* default floating layout */
140 static void focus(Client *c);
141 static void focusnext(const char *arg);
142 static void focusprev(const char *arg);
143 static Client *getclient(Window w);
144 static unsigned long getcolor(const char *colstr);
145 static long getstate(Window w);
146 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
147 static void grabbuttons(Client *c, Bool focused);
148 static unsigned int idxoftag(const char *tag);
149 static void initfont(const char *fontstr);
150 static Bool isarrange(void (*func)());
151 static Bool isoccupied(unsigned int t);
152 static Bool isprotodel(Client *c);
153 static Bool isvisible(Client *c);
154 static void keypress(XEvent *e);
155 static void killclient(const char *arg);
156 static void leavenotify(XEvent *e);
157 static void manage(Window w, XWindowAttributes *wa);
158 static void mappingnotify(XEvent *e);
159 static void maprequest(XEvent *e);
160 static void movemouse(Client *c);
161 static Client *nexttiled(Client *c);
162 static void propertynotify(XEvent *e);
163 static void quit(const char *arg);
164 static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
165 static void resizemouse(Client *c);
166 static void restack(void);
167 static void run(void);
168 static void scan(void);
169 static void setclientstate(Client *c, long state);
170 static void setlayout(const char *arg);
171 static void setmwfact(const char *arg);
172 static void setup(void);
173 static void spawn(const char *arg);
174 static void tag(const char *arg);
175 static unsigned int textnw(const char *text, unsigned int len);
176 static unsigned int textw(const char *text);
177 static void tile(void);
178 static void togglebar(const char *arg);
179 static void togglefloating(const char *arg);
180 static void togglemax(const char *arg);
181 static void toggletag(const char *arg);
182 static void toggleview(const char *arg);
183 static void unban(Client *c);
184 static void unmanage(Client *c);
185 static void unmapnotify(XEvent *e);
186 static void updatebarpos(void);
187 static void updatesizehints(Client *c);
188 static void updatetitle(Client *c);
189 static void view(const char *arg);
190 static int xerror(Display *dpy, XErrorEvent *ee);
191 static int xerrordummy(Display *dsply, XErrorEvent *ee);
192 static int xerrorstart(Display *dsply, XErrorEvent *ee);
193 static void zoom(const char *arg);
194
195 /* variables */
196 static char stext[256];
197 static double mwfact;
198 static int screen, sx, sy, sw, sh, wax, way, waw, wah;
199 static int (*xerrorxlib)(Display *, XErrorEvent *);
200 static unsigned int bh, bpos, ntags;
201 static unsigned int blw = 0;
202 static unsigned int ltidx = 0; /* default */
203 static unsigned int nlayouts = 0;
204 static unsigned int nrules = 0;
205 static unsigned int numlockmask = 0;
206 static void (*handler[LASTEvent]) (XEvent *) = {
207 [ButtonPress] = buttonpress,
208 [ConfigureRequest] = configurerequest,
209 [ConfigureNotify] = configurenotify,
210 [DestroyNotify] = destroynotify,
211 [EnterNotify] = enternotify,
212 [LeaveNotify] = leavenotify,
213 [Expose] = expose,
214 [KeyPress] = keypress,
215 [MappingNotify] = mappingnotify,
216 [MapRequest] = maprequest,
217 [PropertyNotify] = propertynotify,
218 [UnmapNotify] = unmapnotify
219 };
220 static Atom wmatom[WMLast], netatom[NetLast];
221 static Bool otherwm, readin;
222 static Bool running = True;
223 static Bool *seltags;
224 static Bool selscreen = True;
225 static Client *clients = NULL;
226 static Client *sel = NULL;
227 static Client *stack = NULL;
228 static Cursor cursor[CurLast];
229 static Display *dpy;
230 static DC dc = {0};
231 static Window barwin, root;
232 static Regs *regs = NULL;
233
234 /* configuration, allows nested code to access above variables */
235 #include "config.h"
236
237 /* functions*/
238 static void
239 applyrules(Client *c) {
240 static char buf[512];
241 unsigned int i, j;
242 regmatch_t tmp;
243 Bool matched = False;
244 XClassHint ch = { 0 };
245
246 /* rule matching */
247 XGetClassHint(dpy, c->win, &ch);
248 snprintf(buf, sizeof buf, "%s:%s:%s",
249 ch.res_class ? ch.res_class : "",
250 ch.res_name ? ch.res_name : "", c->name);
251 for(i = 0; i < nrules; i++)
252 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
253 c->isfloating = rules[i].isfloating;
254 for(j = 0; regs[i].tagregex && j < ntags; j++) {
255 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
256 matched = True;
257 c->tags[j] = True;
258 }
259 }
260 }
261 if(ch.res_class)
262 XFree(ch.res_class);
263 if(ch.res_name)
264 XFree(ch.res_name);
265 if(!matched)
266 for(i = 0; i < ntags; i++)
267 c->tags[i] = seltags[i];
268 }
269
270 static void
271 arrange(void) {
272 Client *c;
273
274 for(c = clients; c; c = c->next)
275 if(isvisible(c))
276 unban(c);
277 else
278 ban(c);
279 layouts[ltidx].arrange();
280 focus(NULL);
281 restack();
282 }
283
284 static void
285 attach(Client *c) {
286 if(clients)
287 clients->prev = c;
288 c->next = clients;
289 clients = c;
290 }
291
292 static void
293 attachstack(Client *c) {
294 c->snext = stack;
295 stack = c;
296 }
297
298 static void
299 ban(Client *c) {
300 if(c->isbanned)
301 return;
302 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
303 c->isbanned = True;
304 }
305
306 static void
307 buttonpress(XEvent *e) {
308 unsigned int i, x;
309 Client *c;
310 XButtonPressedEvent *ev = &e->xbutton;
311
312 if(barwin == ev->window) {
313 x = 0;
314 for(i = 0; i < ntags; i++) {
315 x += textw(tags[i]);
316 if(ev->x < x) {
317 if(ev->button == Button1) {
318 if(ev->state & MODKEY)
319 tag(tags[i]);
320 else
321 view(tags[i]);
322 }
323 else if(ev->button == Button3) {
324 if(ev->state & MODKEY)
325 toggletag(tags[i]);
326 else
327 toggleview(tags[i]);
328 }
329 return;
330 }
331 }
332 if((ev->x < x + blw) && ev->button == Button1)
333 setlayout(NULL);
334 }
335 else if((c = getclient(ev->window))) {
336 focus(c);
337 if(CLEANMASK(ev->state) != MODKEY)
338 return;
339 if(ev->button == Button1) {
340 if(!isarrange(floating) && !c->isfloating)
341 togglefloating(NULL);
342 else
343 restack();
344 movemouse(c);
345 }
346 else if(ev->button == Button2) {
347 if(isarrange(tile) && !c->isfixed && c->isfloating)
348 togglefloating(NULL);
349 else
350 zoom(NULL);
351 }
352 else if(ev->button == Button3 && !c->isfixed) {
353 if(!isarrange(floating) && !c->isfloating)
354 togglefloating(NULL);
355 else
356 restack();
357 resizemouse(c);
358 }
359 }
360 }
361
362 static void
363 checkotherwm(void) {
364 otherwm = False;
365 XSetErrorHandler(xerrorstart);
366
367 /* this causes an error if some other window manager is running */
368 XSelectInput(dpy, root, SubstructureRedirectMask);
369 XSync(dpy, False);
370 if(otherwm)
371 eprint("dwm: another window manager is already running\n");
372 XSync(dpy, False);
373 XSetErrorHandler(NULL);
374 xerrorxlib = XSetErrorHandler(xerror);
375 XSync(dpy, False);
376 }
377
378 static void
379 cleanup(void) {
380 close(STDIN_FILENO);
381 while(stack) {
382 unban(stack);
383 unmanage(stack);
384 }
385 if(dc.font.set)
386 XFreeFontSet(dpy, dc.font.set);
387 else
388 XFreeFont(dpy, dc.font.xfont);
389 XUngrabKey(dpy, AnyKey, AnyModifier, root);
390 XFreePixmap(dpy, dc.drawable);
391 XFreeGC(dpy, dc.gc);
392 XDestroyWindow(dpy, barwin);
393 XFreeCursor(dpy, cursor[CurNormal]);
394 XFreeCursor(dpy, cursor[CurResize]);
395 XFreeCursor(dpy, cursor[CurMove]);
396 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
397 XSync(dpy, False);
398 free(seltags);
399 }
400
401 static void
402 compileregs(void) {
403 unsigned int i;
404 regex_t *reg;
405
406 if(regs)
407 return;
408 nrules = sizeof rules / sizeof rules[0];
409 regs = emallocz(nrules * sizeof(Regs));
410 for(i = 0; i < nrules; i++) {
411 if(rules[i].prop) {
412 reg = emallocz(sizeof(regex_t));
413 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
414 free(reg);
415 else
416 regs[i].propregex = reg;
417 }
418 if(rules[i].tags) {
419 reg = emallocz(sizeof(regex_t));
420 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
421 free(reg);
422 else
423 regs[i].tagregex = reg;
424 }
425 }
426 }
427
428 static void
429 configure(Client *c) {
430 XConfigureEvent ce;
431
432 ce.type = ConfigureNotify;
433 ce.display = dpy;
434 ce.event = c->win;
435 ce.window = c->win;
436 ce.x = c->x;
437 ce.y = c->y;
438 ce.width = c->w;
439 ce.height = c->h;
440 ce.border_width = c->border;
441 ce.above = None;
442 ce.override_redirect = False;
443 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
444 }
445
446 static void
447 configurenotify(XEvent *e) {
448 XConfigureEvent *ev = &e->xconfigure;
449
450 if (ev->window == root && (ev->width != sw || ev->height != sh)) {
451 sw = ev->width;
452 sh = ev->height;
453 XFreePixmap(dpy, dc.drawable);
454 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
455 XResizeWindow(dpy, barwin, sw, bh);
456 updatebarpos();
457 arrange();
458 }
459 }
460
461 static void
462 configurerequest(XEvent *e) {
463 Client *c;
464 XConfigureRequestEvent *ev = &e->xconfigurerequest;
465 XWindowChanges wc;
466
467 if((c = getclient(ev->window))) {
468 c->ismax = False;
469 if(ev->value_mask & CWBorderWidth)
470 c->border = ev->border_width;
471 if(c->isfixed || c->isfloating || isarrange(floating)) {
472 if(ev->value_mask & CWX)
473 c->x = ev->x;
474 if(ev->value_mask & CWY)
475 c->y = ev->y;
476 if(ev->value_mask & CWWidth)
477 c->w = ev->width;
478 if(ev->value_mask & CWHeight)
479 c->h = ev->height;
480 if((c->x + c->w) > sw && c->isfloating)
481 c->x = sw / 2 - c->w / 2; /* center in x direction */
482 if((c->y + c->h) > sh && c->isfloating)
483 c->y = sh / 2 - c->h / 2; /* center in y direction */
484 if((ev->value_mask & (CWX | CWY))
485 && !(ev->value_mask & (CWWidth | CWHeight)))
486 configure(c);
487 if(isvisible(c))
488 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
489 }
490 else
491 configure(c);
492 }
493 else {
494 wc.x = ev->x;
495 wc.y = ev->y;
496 wc.width = ev->width;
497 wc.height = ev->height;
498 wc.border_width = ev->border_width;
499 wc.sibling = ev->above;
500 wc.stack_mode = ev->detail;
501 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
502 }
503 XSync(dpy, False);
504 }
505
506 static void
507 destroynotify(XEvent *e) {
508 Client *c;
509 XDestroyWindowEvent *ev = &e->xdestroywindow;
510
511 if((c = getclient(ev->window)))
512 unmanage(c);
513 }
514
515 static void
516 detach(Client *c) {
517 if(c->prev)
518 c->prev->next = c->next;
519 if(c->next)
520 c->next->prev = c->prev;
521 if(c == clients)
522 clients = c->next;
523 c->next = c->prev = NULL;
524 }
525
526 static void
527 detachstack(Client *c) {
528 Client **tc;
529
530 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
531 *tc = c->snext;
532 }
533
534 static void
535 drawbar(void) {
536 int i, x;
537
538 dc.x = dc.y = 0;
539 for(i = 0; i < ntags; i++) {
540 dc.w = textw(tags[i]);
541 if(seltags[i]) {
542 drawtext(tags[i], dc.sel);
543 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
544 }
545 else {
546 drawtext(tags[i], dc.norm);
547 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
548 }
549 dc.x += dc.w;
550 }
551 dc.w = blw;
552 drawtext(layouts[ltidx].symbol, dc.norm);
553 x = dc.x + dc.w;
554 dc.w = textw(stext);
555 dc.x = sw - dc.w;
556 if(dc.x < x) {
557 dc.x = x;
558 dc.w = sw - x;
559 }
560 drawtext(stext, dc.norm);
561 if((dc.w = dc.x - x) > bh) {
562 dc.x = x;
563 if(sel) {
564 drawtext(sel->name, dc.sel);
565 drawsquare(sel->ismax, sel->isfloating, dc.sel);
566 }
567 else
568 drawtext(NULL, dc.norm);
569 }
570 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
571 XSync(dpy, False);
572 }
573
574 static void
575 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
576 int x;
577 XGCValues gcv;
578 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
579
580 gcv.foreground = col[ColFG];
581 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
582 x = (dc.font.ascent + dc.font.descent + 2) / 4;
583 r.x = dc.x + 1;
584 r.y = dc.y + 1;
585 if(filled) {
586 r.width = r.height = x + 1;
587 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
588 }
589 else if(empty) {
590 r.width = r.height = x;
591 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
592 }
593 }
594
595 static void
596 drawtext(const char *text, unsigned long col[ColLast]) {
597 int x, y, w, h;
598 static char buf[256];
599 unsigned int len, olen;
600 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
601
602 XSetForeground(dpy, dc.gc, col[ColBG]);
603 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
604 if(!text)
605 return;
606 w = 0;
607 olen = len = strlen(text);
608 if(len >= sizeof buf)
609 len = sizeof buf - 1;
610 memcpy(buf, text, len);
611 buf[len] = 0;
612 h = dc.font.ascent + dc.font.descent;
613 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
614 x = dc.x + (h / 2);
615 /* shorten text if necessary */
616 while(len && (w = textnw(buf, len)) > dc.w - h)
617 buf[--len] = 0;
618 if(len < olen) {
619 if(len > 1)
620 buf[len - 1] = '.';
621 if(len > 2)
622 buf[len - 2] = '.';
623 if(len > 3)
624 buf[len - 3] = '.';
625 }
626 if(w > dc.w)
627 return; /* too long */
628 XSetForeground(dpy, dc.gc, col[ColFG]);
629 if(dc.font.set)
630 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
631 else
632 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
633 }
634
635 static void *
636 emallocz(unsigned int size) {
637 void *res = calloc(1, size);
638
639 if(!res)
640 eprint("fatal: could not malloc() %u bytes\n", size);
641 return res;
642 }
643
644 static void
645 enternotify(XEvent *e) {
646 Client *c;
647 XCrossingEvent *ev = &e->xcrossing;
648
649 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
650 return;
651 if((c = getclient(ev->window)))
652 focus(c);
653 else if(ev->window == root) {
654 selscreen = True;
655 focus(NULL);
656 }
657 }
658
659 static void
660 eprint(const char *errstr, ...) {
661 va_list ap;
662
663 va_start(ap, errstr);
664 vfprintf(stderr, errstr, ap);
665 va_end(ap);
666 exit(EXIT_FAILURE);
667 }
668
669 static void
670 expose(XEvent *e) {
671 XExposeEvent *ev = &e->xexpose;
672
673 if(ev->count == 0) {
674 if(barwin == ev->window)
675 drawbar();
676 }
677 }
678
679 static void
680 floating(void) { /* default floating layout */
681 Client *c;
682
683 for(c = clients; c; c = c->next)
684 if(isvisible(c))
685 resize(c, c->x, c->y, c->w, c->h, True);
686 }
687
688 static void
689 focus(Client *c) {
690 if((!c && selscreen) || (c && !isvisible(c)))
691 for(c = stack; c && !isvisible(c); c = c->snext);
692 if(sel && sel != c) {
693 grabbuttons(sel, False);
694 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
695 }
696 if(c) {
697 detachstack(c);
698 attachstack(c);
699 grabbuttons(c, True);
700 }
701 sel = c;
702 drawbar();
703 if(!selscreen)
704 return;
705 if(c) {
706 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
707 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
708 }
709 else
710 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
711 }
712
713 static void
714 focusnext(const char *arg) {
715 Client *c;
716
717 if(!sel)
718 return;
719 for(c = sel->next; c && !isvisible(c); c = c->next);
720 if(!c)
721 for(c = clients; c && !isvisible(c); c = c->next);
722 if(c) {
723 focus(c);
724 restack();
725 }
726 }
727
728 static void
729 focusprev(const char *arg) {
730 Client *c;
731
732 if(!sel)
733 return;
734 for(c = sel->prev; c && !isvisible(c); c = c->prev);
735 if(!c) {
736 for(c = clients; c && c->next; c = c->next);
737 for(; c && !isvisible(c); c = c->prev);
738 }
739 if(c) {
740 focus(c);
741 restack();
742 }
743 }
744
745 static Client *
746 getclient(Window w) {
747 Client *c;
748
749 for(c = clients; c && c->win != w; c = c->next);
750 return c;
751 }
752
753 static unsigned long
754 getcolor(const char *colstr) {
755 Colormap cmap = DefaultColormap(dpy, screen);
756 XColor color;
757
758 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
759 eprint("error, cannot allocate color '%s'\n", colstr);
760 return color.pixel;
761 }
762
763 static long
764 getstate(Window w) {
765 int format, status;
766 long result = -1;
767 unsigned char *p = NULL;
768 unsigned long n, extra;
769 Atom real;
770
771 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
772 &real, &format, &n, &extra, (unsigned char **)&p);
773 if(status != Success)
774 return -1;
775 if(n != 0)
776 result = *p;
777 XFree(p);
778 return result;
779 }
780
781 static Bool
782 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
783 char **list = NULL;
784 int n;
785 XTextProperty name;
786
787 if(!text || size == 0)
788 return False;
789 text[0] = '\0';
790 XGetTextProperty(dpy, w, &name, atom);
791 if(!name.nitems)
792 return False;
793 if(name.encoding == XA_STRING)
794 strncpy(text, (char *)name.value, size - 1);
795 else {
796 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
797 && n > 0 && *list)
798 {
799 strncpy(text, *list, size - 1);
800 XFreeStringList(list);
801 }
802 }
803 text[size - 1] = '\0';
804 XFree(name.value);
805 return True;
806 }
807
808 static void
809 grabbuttons(Client *c, Bool focused) {
810 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
811
812 if(focused) {
813 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
814 GrabModeAsync, GrabModeSync, None, None);
815 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
816 GrabModeAsync, GrabModeSync, None, None);
817 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
818 GrabModeAsync, GrabModeSync, None, None);
819 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
820 GrabModeAsync, GrabModeSync, None, None);
821
822 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
823 GrabModeAsync, GrabModeSync, None, None);
824 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
825 GrabModeAsync, GrabModeSync, None, None);
826 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
827 GrabModeAsync, GrabModeSync, None, None);
828 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
829 GrabModeAsync, GrabModeSync, None, None);
830
831 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
832 GrabModeAsync, GrabModeSync, None, None);
833 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
834 GrabModeAsync, GrabModeSync, None, None);
835 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
836 GrabModeAsync, GrabModeSync, None, None);
837 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
838 GrabModeAsync, GrabModeSync, None, None);
839 }
840 else
841 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
842 GrabModeAsync, GrabModeSync, None, None);
843 }
844
845 static unsigned int
846 idxoftag(const char *tag) {
847 unsigned int i;
848
849 for(i = 0; i < ntags; i++)
850 if(tags[i] == tag)
851 return i;
852 return 0;
853 }
854
855 static void
856 initfont(const char *fontstr) {
857 char *def, **missing;
858 int i, n;
859
860 missing = NULL;
861 if(dc.font.set)
862 XFreeFontSet(dpy, dc.font.set);
863 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
864 if(missing) {
865 while(n--)
866 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
867 XFreeStringList(missing);
868 }
869 if(dc.font.set) {
870 XFontSetExtents *font_extents;
871 XFontStruct **xfonts;
872 char **font_names;
873 dc.font.ascent = dc.font.descent = 0;
874 font_extents = XExtentsOfFontSet(dc.font.set);
875 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
876 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
877 if(dc.font.ascent < (*xfonts)->ascent)
878 dc.font.ascent = (*xfonts)->ascent;
879 if(dc.font.descent < (*xfonts)->descent)
880 dc.font.descent = (*xfonts)->descent;
881 xfonts++;
882 }
883 }
884 else {
885 if(dc.font.xfont)
886 XFreeFont(dpy, dc.font.xfont);
887 dc.font.xfont = NULL;
888 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
889 || !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
890 eprint("error, cannot load font: '%s'\n", fontstr);
891 dc.font.ascent = dc.font.xfont->ascent;
892 dc.font.descent = dc.font.xfont->descent;
893 }
894 dc.font.height = dc.font.ascent + dc.font.descent;
895 }
896
897 static Bool
898 isarrange(void (*func)())
899 {
900 return func == layouts[ltidx].arrange;
901 }
902
903 static Bool
904 isoccupied(unsigned int t) {
905 Client *c;
906
907 for(c = clients; c; c = c->next)
908 if(c->tags[t])
909 return True;
910 return False;
911 }
912
913 static Bool
914 isprotodel(Client *c) {
915 int i, n;
916 Atom *protocols;
917 Bool ret = False;
918
919 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
920 for(i = 0; !ret && i < n; i++)
921 if(protocols[i] == wmatom[WMDelete])
922 ret = True;
923 XFree(protocols);
924 }
925 return ret;
926 }
927
928 static Bool
929 isvisible(Client *c) {
930 unsigned int i;
931
932 for(i = 0; i < ntags; i++)
933 if(c->tags[i] && seltags[i])
934 return True;
935 return False;
936 }
937
938 static void
939 keypress(XEvent *e) {
940 KEYS
941 unsigned int len = sizeof keys / sizeof keys[0];
942 unsigned int i;
943 KeyCode code;
944 KeySym keysym;
945 XKeyEvent *ev;
946
947 if(!e) { /* grabkeys */
948 XUngrabKey(dpy, AnyKey, AnyModifier, root);
949 for(i = 0; i < len; i++) {
950 code = XKeysymToKeycode(dpy, keys[i].keysym);
951 XGrabKey(dpy, code, keys[i].mod, root, True,
952 GrabModeAsync, GrabModeAsync);
953 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
954 GrabModeAsync, GrabModeAsync);
955 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
956 GrabModeAsync, GrabModeAsync);
957 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
958 GrabModeAsync, GrabModeAsync);
959 }
960 return;
961 }
962 ev = &e->xkey;
963 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
964 for(i = 0; i < len; i++)
965 if(keysym == keys[i].keysym
966 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
967 {
968 if(keys[i].func)
969 keys[i].func(keys[i].arg);
970 }
971 }
972
973 static void
974 killclient(const char *arg) {
975 XEvent ev;
976
977 if(!sel)
978 return;
979 if(isprotodel(sel)) {
980 ev.type = ClientMessage;
981 ev.xclient.window = sel->win;
982 ev.xclient.message_type = wmatom[WMProtocols];
983 ev.xclient.format = 32;
984 ev.xclient.data.l[0] = wmatom[WMDelete];
985 ev.xclient.data.l[1] = CurrentTime;
986 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
987 }
988 else
989 XKillClient(dpy, sel->win);
990 }
991
992 static void
993 leavenotify(XEvent *e) {
994 XCrossingEvent *ev = &e->xcrossing;
995
996 if((ev->window == root) && !ev->same_screen) {
997 selscreen = False;
998 focus(NULL);
999 }
1000 }
1001
1002 static void
1003 manage(Window w, XWindowAttributes *wa) {
1004 unsigned int i;
1005 Client *c, *t = NULL;
1006 Window trans;
1007 Status rettrans;
1008 XWindowChanges wc;
1009
1010 c = emallocz(sizeof(Client));
1011 c->tags = emallocz(ntags * sizeof(Bool));
1012 c->win = w;
1013 c->x = wa->x;
1014 c->y = wa->y;
1015 c->w = wa->width;
1016 c->h = wa->height;
1017 c->oldborder = wa->border_width;
1018 if(c->w == sw && c->h == sh) {
1019 c->x = sx;
1020 c->y = sy;
1021 c->border = wa->border_width;
1022 }
1023 else {
1024 if(c->x + c->w + 2 * c->border > wax + waw)
1025 c->x = wax + waw - c->w - 2 * c->border;
1026 if(c->y + c->h + 2 * c->border > way + wah)
1027 c->y = way + wah - c->h - 2 * c->border;
1028 if(c->x < wax)
1029 c->x = wax;
1030 if(c->y < way)
1031 c->y = way;
1032 c->border = BORDERPX;
1033 }
1034 wc.border_width = c->border;
1035 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1036 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1037 configure(c); /* propagates border_width, if size doesn't change */
1038 updatesizehints(c);
1039 XSelectInput(dpy, w,
1040 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
1041 grabbuttons(c, False);
1042 updatetitle(c);
1043 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1044 for(t = clients; t && t->win != trans; t = t->next);
1045 if(t)
1046 for(i = 0; i < ntags; i++)
1047 c->tags[i] = t->tags[i];
1048 applyrules(c);
1049 if(!c->isfloating)
1050 c->isfloating = (rettrans == Success) || c->isfixed;
1051 attach(c);
1052 attachstack(c);
1053 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1054 ban(c);
1055 XMapWindow(dpy, c->win);
1056 setclientstate(c, NormalState);
1057 arrange();
1058 }
1059
1060 static void
1061 mappingnotify(XEvent *e) {
1062 XMappingEvent *ev = &e->xmapping;
1063
1064 XRefreshKeyboardMapping(ev);
1065 if(ev->request == MappingKeyboard)
1066 keypress(NULL);
1067 }
1068
1069 static void
1070 maprequest(XEvent *e) {
1071 static XWindowAttributes wa;
1072 XMapRequestEvent *ev = &e->xmaprequest;
1073
1074 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1075 return;
1076 if(wa.override_redirect)
1077 return;
1078 if(!getclient(ev->window))
1079 manage(ev->window, &wa);
1080 }
1081
1082 static void
1083 movemouse(Client *c) {
1084 int x1, y1, ocx, ocy, di, nx, ny;
1085 unsigned int dui;
1086 Window dummy;
1087 XEvent ev;
1088
1089 ocx = nx = c->x;
1090 ocy = ny = c->y;
1091 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1092 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1093 return;
1094 c->ismax = False;
1095 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1096 for(;;) {
1097 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1098 switch (ev.type) {
1099 case ButtonRelease:
1100 XUngrabPointer(dpy, CurrentTime);
1101 return;
1102 case ConfigureRequest:
1103 case Expose:
1104 case MapRequest:
1105 handler[ev.type](&ev);
1106 break;
1107 case MotionNotify:
1108 XSync(dpy, False);
1109 nx = ocx + (ev.xmotion.x - x1);
1110 ny = ocy + (ev.xmotion.y - y1);
1111 if(abs(wax + nx) < SNAP)
1112 nx = wax;
1113 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1114 nx = wax + waw - c->w - 2 * c->border;
1115 if(abs(way - ny) < SNAP)
1116 ny = way;
1117 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1118 ny = way + wah - c->h - 2 * c->border;
1119 resize(c, nx, ny, c->w, c->h, False);
1120 break;
1121 }
1122 }
1123 }
1124
1125 static Client *
1126 nexttiled(Client *c) {
1127 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1128 return c;
1129 }
1130
1131 static void
1132 propertynotify(XEvent *e) {
1133 Client *c;
1134 Window trans;
1135 XPropertyEvent *ev = &e->xproperty;
1136
1137 if(ev->state == PropertyDelete)
1138 return; /* ignore */
1139 if((c = getclient(ev->window))) {
1140 switch (ev->atom) {
1141 default: break;
1142 case XA_WM_TRANSIENT_FOR:
1143 XGetTransientForHint(dpy, c->win, &trans);
1144 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1145 arrange();
1146 break;
1147 case XA_WM_NORMAL_HINTS:
1148 updatesizehints(c);
1149 break;
1150 }
1151 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1152 updatetitle(c);
1153 if(c == sel)
1154 drawbar();
1155 }
1156 }
1157 }
1158
1159 static void
1160 quit(const char *arg) {
1161 readin = running = False;
1162 }
1163
1164 static void
1165 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1166 double dx, dy, max, min, ratio;
1167 XWindowChanges wc;
1168
1169 if(sizehints) {
1170 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
1171 dx = (double)(w - c->basew);
1172 dy = (double)(h - c->baseh);
1173 min = (double)(c->minax) / (double)(c->minay);
1174 max = (double)(c->maxax) / (double)(c->maxay);
1175 ratio = dx / dy;
1176 if(max > 0 && min > 0 && ratio > 0) {
1177 if(ratio < min) {
1178 dy = (dx * min + dy) / (min * min + 1);
1179 dx = dy * min;
1180 w = (int)dx + c->basew;
1181 h = (int)dy + c->baseh;
1182 }
1183 else if(ratio > max) {
1184 dy = (dx * min + dy) / (max * max + 1);
1185 dx = dy * min;
1186 w = (int)dx + c->basew;
1187 h = (int)dy + c->baseh;
1188 }
1189 }
1190 }
1191 if(c->minw && w < c->minw)
1192 w = c->minw;
1193 if(c->minh && h < c->minh)
1194 h = c->minh;
1195 if(c->maxw && w > c->maxw)
1196 w = c->maxw;
1197 if(c->maxh && h > c->maxh)
1198 h = c->maxh;
1199 if(c->incw)
1200 w -= (w - c->basew) % c->incw;
1201 if(c->inch)
1202 h -= (h - c->baseh) % c->inch;
1203 }
1204 if(w <= 0 || h <= 0)
1205 return;
1206 /* offscreen appearance fixes */
1207 if(x > sw)
1208 x = sw - w - 2 * c->border;
1209 if(y > sh)
1210 y = sh - h - 2 * c->border;
1211 if(x + w + 2 * c->border < sx)
1212 x = sx;
1213 if(y + h + 2 * c->border < sy)
1214 y = sy;
1215 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1216 c->x = wc.x = x;
1217 c->y = wc.y = y;
1218 c->w = wc.width = w;
1219 c->h = wc.height = h;
1220 wc.border_width = c->border;
1221 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1222 configure(c);
1223 XSync(dpy, False);
1224 }
1225 }
1226
1227 static void
1228 resizemouse(Client *c) {
1229 int ocx, ocy;
1230 int nw, nh;
1231 XEvent ev;
1232
1233 ocx = c->x;
1234 ocy = c->y;
1235 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1236 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1237 return;
1238 c->ismax = False;
1239 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1240 for(;;) {
1241 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1242 switch(ev.type) {
1243 case ButtonRelease:
1244 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1245 c->w + c->border - 1, c->h + c->border - 1);
1246 XUngrabPointer(dpy, CurrentTime);
1247 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1248 return;
1249 case ConfigureRequest:
1250 case Expose:
1251 case MapRequest:
1252 handler[ev.type](&ev);
1253 break;
1254 case MotionNotify:
1255 XSync(dpy, False);
1256 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1257 nw = 1;
1258 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1259 nh = 1;
1260 resize(c, c->x, c->y, nw, nh, True);
1261 break;
1262 }
1263 }
1264 }
1265
1266 static void
1267 restack(void) {
1268 Client *c;
1269 XEvent ev;
1270 XWindowChanges wc;
1271
1272 drawbar();
1273 if(!sel)
1274 return;
1275 if(sel->isfloating || isarrange(floating))
1276 XRaiseWindow(dpy, sel->win);
1277 if(!isarrange(floating)) {
1278 wc.stack_mode = Below;
1279 wc.sibling = barwin;
1280 if(!sel->isfloating) {
1281 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1282 wc.sibling = sel->win;
1283 }
1284 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1285 if(c == sel)
1286 continue;
1287 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1288 wc.sibling = c->win;
1289 }
1290 }
1291 XSync(dpy, False);
1292 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1293 }
1294
1295 static void
1296 run(void) {
1297 char *p;
1298 int r, xfd;
1299 fd_set rd;
1300 XEvent ev;
1301
1302 /* main event loop, also reads status text from stdin */
1303 XSync(dpy, False);
1304 xfd = ConnectionNumber(dpy);
1305 readin = True;
1306 while(running) {
1307 FD_ZERO(&rd);
1308 if(readin)
1309 FD_SET(STDIN_FILENO, &rd);
1310 FD_SET(xfd, &rd);
1311 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1312 if(errno == EINTR)
1313 continue;
1314 eprint("select failed\n");
1315 }
1316 if(FD_ISSET(STDIN_FILENO, &rd)) {
1317 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1318 case -1:
1319 strncpy(stext, strerror(errno), sizeof stext - 1);
1320 stext[sizeof stext - 1] = '\0';
1321 readin = False;
1322 break;
1323 case 0:
1324 strncpy(stext, "EOF", 4);
1325 readin = False;
1326 break;
1327 default:
1328 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1329 for(; p >= stext && *p != '\n'; --p);
1330 if(p > stext)
1331 strncpy(stext, p + 1, sizeof stext);
1332 }
1333 drawbar();
1334 }
1335 while(XPending(dpy)) {
1336 XNextEvent(dpy, &ev);
1337 if(handler[ev.type])
1338 (handler[ev.type])(&ev); /* call handler */
1339 }
1340 }
1341 }
1342
1343 static void
1344 scan(void) {
1345 unsigned int i, num;
1346 Window *wins, d1, d2;
1347 XWindowAttributes wa;
1348
1349 wins = NULL;
1350 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1351 for(i = 0; i < num; i++) {
1352 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1353 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1354 continue;
1355 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1356 manage(wins[i], &wa);
1357 }
1358 for(i = 0; i < num; i++) { /* now the transients */
1359 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1360 continue;
1361 if(XGetTransientForHint(dpy, wins[i], &d1)
1362 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1363 manage(wins[i], &wa);
1364 }
1365 }
1366 if(wins)
1367 XFree(wins);
1368 }
1369
1370 static void
1371 setclientstate(Client *c, long state) {
1372 long data[] = {state, None};
1373
1374 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1375 PropModeReplace, (unsigned char *)data, 2);
1376 }
1377
1378 static void
1379 setlayout(const char *arg) {
1380 unsigned int i;
1381
1382 if(!arg) {
1383 if(++ltidx == nlayouts)
1384 ltidx = 0;;
1385 }
1386 else {
1387 for(i = 0; i < nlayouts; i++)
1388 if(!strcmp(arg, layouts[i].symbol))
1389 break;
1390 if(i == nlayouts)
1391 return;
1392 ltidx = i;
1393 }
1394 if(sel)
1395 arrange();
1396 else
1397 drawbar();
1398 }
1399
1400 static void
1401 setmwfact(const char *arg) {
1402 double delta;
1403
1404 if(!isarrange(tile))
1405 return;
1406 /* arg handling, manipulate mwfact */
1407 if(arg == NULL)
1408 mwfact = MWFACT;
1409 else if(1 == sscanf(arg, "%lf", &delta)) {
1410 if(arg[0] != '+' && arg[0] != '-')
1411 mwfact = delta;
1412 else
1413 mwfact += delta;
1414 if(mwfact < 0.1)
1415 mwfact = 0.1;
1416 else if(mwfact > 0.9)
1417 mwfact = 0.9;
1418 }
1419 arrange();
1420 }
1421
1422 static void
1423 setup(void) {
1424 unsigned int i, j, mask;
1425 Window w;
1426 XModifierKeymap *modmap;
1427 XSetWindowAttributes wa;
1428
1429 /* init atoms */
1430 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1431 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1432 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1433 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1434 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1435 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1436 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1437 PropModeReplace, (unsigned char *) netatom, NetLast);
1438
1439 /* init cursors */
1440 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1441 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1442 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1443
1444 /* init geometry */
1445 sx = sy = 0;
1446 sw = DisplayWidth(dpy, screen);
1447 sh = DisplayHeight(dpy, screen);
1448
1449 /* init modifier map */
1450 modmap = XGetModifierMapping(dpy);
1451 for(i = 0; i < 8; i++)
1452 for(j = 0; j < modmap->max_keypermod; j++) {
1453 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1454 == XKeysymToKeycode(dpy, XK_Num_Lock))
1455 numlockmask = (1 << i);
1456 }
1457 XFreeModifiermap(modmap);
1458
1459 /* select for events */
1460 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1461 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1462 wa.cursor = cursor[CurNormal];
1463 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1464 XSelectInput(dpy, root, wa.event_mask);
1465
1466 /* grab keys */
1467 keypress(NULL);
1468
1469 /* init tags */
1470 compileregs();
1471 for(ntags = 0; tags[ntags]; ntags++);
1472 seltags = emallocz(sizeof(Bool) * ntags);
1473 seltags[0] = True;
1474
1475 /* init appearance */
1476 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1477 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1478 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1479 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1480 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1481 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1482 initfont(FONT);
1483 dc.h = bh = dc.font.height + 2;
1484
1485 /* init layouts */
1486 mwfact = MWFACT;
1487 nlayouts = sizeof layouts / sizeof layouts[0];
1488 for(blw = i = 0; i < nlayouts; i++) {
1489 j = textw(layouts[i].symbol);
1490 if(j > blw)
1491 blw = j;
1492 }
1493
1494 /* init bar */
1495 bpos = BARPOS;
1496 wa.override_redirect = 1;
1497 wa.background_pixmap = ParentRelative;
1498 wa.event_mask = ButtonPressMask | ExposureMask;
1499 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1500 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1501 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1502 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1503 updatebarpos();
1504 XMapRaised(dpy, barwin);
1505 strcpy(stext, "dwm-"VERSION);
1506 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1507 dc.gc = XCreateGC(dpy, root, 0, 0);
1508 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1509 if(!dc.font.set)
1510 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1511
1512 /* multihead support */
1513 selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
1514 }
1515
1516 static void
1517 spawn(const char *arg) {
1518 static char *shell = NULL;
1519
1520 if(!shell && !(shell = getenv("SHELL")))
1521 shell = "/bin/sh";
1522 if(!arg)
1523 return;
1524 /* The double-fork construct avoids zombie processes and keeps the code
1525 * clean from stupid signal handlers. */
1526 if(fork() == 0) {
1527 if(fork() == 0) {
1528 if(dpy)
1529 close(ConnectionNumber(dpy));
1530 setsid();
1531 execl(shell, shell, "-c", arg, (char *)NULL);
1532 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1533 perror(" failed");
1534 }
1535 exit(0);
1536 }
1537 wait(0);
1538 }
1539
1540 static void
1541 tag(const char *arg) {
1542 unsigned int i;
1543
1544 if(!sel)
1545 return;
1546 for(i = 0; i < ntags; i++)
1547 sel->tags[i] = arg == NULL;
1548 i = idxoftag(arg);
1549 if(i >= 0 && i < ntags)
1550 sel->tags[i] = True;
1551 arrange();
1552 }
1553
1554 static unsigned int
1555 textnw(const char *text, unsigned int len) {
1556 XRectangle r;
1557
1558 if(dc.font.set) {
1559 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1560 return r.width;
1561 }
1562 return XTextWidth(dc.font.xfont, text, len);
1563 }
1564
1565 static unsigned int
1566 textw(const char *text) {
1567 return textnw(text, strlen(text)) + dc.font.height;
1568 }
1569
1570 static void
1571 tile(void) {
1572 unsigned int i, n, nx, ny, nw, nh, mw, th;
1573 Client *c;
1574
1575 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1576 n++;
1577
1578 /* window geoms */
1579 mw = (n == 1) ? waw : mwfact * waw;
1580 th = (n > 1) ? wah / (n - 1) : 0;
1581 if(n > 1 && th < bh)
1582 th = wah;
1583
1584 nx = wax;
1585 ny = way;
1586 for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1587 c->ismax = False;
1588 if(i == 0) { /* master */
1589 nw = mw - 2 * c->border;
1590 nh = wah - 2 * c->border;
1591 }
1592 else { /* tile window */
1593 if(i == 1) {
1594 ny = way;
1595 nx += mw;
1596 }
1597 nw = waw - mw - 2 * c->border;
1598 if(i + 1 == n) /* remainder */
1599 nh = (way + wah) - ny - 2 * c->border;
1600 else
1601 nh = th - 2 * c->border;
1602 }
1603 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1604 if(n > 1 && th != wah)
1605 ny += nh + 2 * c->border;
1606 }
1607 }
1608
1609 static void
1610 togglebar(const char *arg) {
1611 if(bpos == BarOff)
1612 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1613 else
1614 bpos = BarOff;
1615 updatebarpos();
1616 arrange();
1617 }
1618
1619 static void
1620 togglefloating(const char *arg) {
1621 if(!sel)
1622 return;
1623 sel->isfloating = !sel->isfloating;
1624 if(sel->isfloating)
1625 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1626 arrange();
1627 }
1628
1629 static void
1630 togglemax(const char *arg) {
1631 XEvent ev;
1632
1633 if(!sel || (!isarrange(floating) && !sel->isfloating) || sel->isfixed)
1634 return;
1635 if((sel->ismax = !sel->ismax)) {
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 drawbar();
1645 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1646 }
1647
1648 static void
1649 toggletag(const char *arg) {
1650 unsigned int i, j;
1651
1652 if(!sel)
1653 return;
1654 i = idxoftag(arg);
1655 sel->tags[i] = !sel->tags[i];
1656 for(j = 0; j < ntags && !sel->tags[j]; j++);
1657 if(j == ntags)
1658 sel->tags[i] = True;
1659 arrange();
1660 }
1661
1662 static void
1663 toggleview(const char *arg) {
1664 unsigned int i, j;
1665
1666 i = idxoftag(arg);
1667 seltags[i] = !seltags[i];
1668 for(j = 0; j < ntags && !seltags[j]; j++);
1669 if(j == ntags)
1670 seltags[i] = True; /* cannot toggle last view */
1671 arrange();
1672 }
1673
1674 static void
1675 unban(Client *c) {
1676 if(!c->isbanned)
1677 return;
1678 XMoveWindow(dpy, c->win, c->x, c->y);
1679 c->isbanned = False;
1680 }
1681
1682 static void
1683 unmanage(Client *c) {
1684 XWindowChanges wc;
1685
1686 wc.border_width = c->oldborder;
1687 /* The server grab construct avoids race conditions. */
1688 XGrabServer(dpy);
1689 XSetErrorHandler(xerrordummy);
1690 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1691 detach(c);
1692 detachstack(c);
1693 if(sel == c)
1694 focus(NULL);
1695 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1696 setclientstate(c, WithdrawnState);
1697 free(c->tags);
1698 free(c);
1699 XSync(dpy, False);
1700 XSetErrorHandler(xerror);
1701 XUngrabServer(dpy);
1702 arrange();
1703 }
1704
1705 static void
1706 unmapnotify(XEvent *e) {
1707 Client *c;
1708 XUnmapEvent *ev = &e->xunmap;
1709
1710 if((c = getclient(ev->window)))
1711 unmanage(c);
1712 }
1713
1714 static void
1715 updatebarpos(void) {
1716 XEvent ev;
1717
1718 wax = sx;
1719 way = sy;
1720 wah = sh;
1721 waw = sw;
1722 switch(bpos) {
1723 default:
1724 wah -= bh;
1725 way += bh;
1726 XMoveWindow(dpy, barwin, sx, sy);
1727 break;
1728 case BarBot:
1729 wah -= bh;
1730 XMoveWindow(dpy, barwin, sx, sy + wah);
1731 break;
1732 case BarOff:
1733 XMoveWindow(dpy, barwin, sx, sy - bh);
1734 break;
1735 }
1736 XSync(dpy, False);
1737 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1738 }
1739
1740 static void
1741 updatesizehints(Client *c) {
1742 long msize;
1743 XSizeHints size;
1744
1745 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1746 size.flags = PSize;
1747 c->flags = size.flags;
1748 if(c->flags & PBaseSize) {
1749 c->basew = size.base_width;
1750 c->baseh = size.base_height;
1751 }
1752 else if(c->flags & PMinSize) {
1753 c->basew = size.min_width;
1754 c->baseh = size.min_height;
1755 }
1756 else
1757 c->basew = c->baseh = 0;
1758 if(c->flags & PResizeInc) {
1759 c->incw = size.width_inc;
1760 c->inch = size.height_inc;
1761 }
1762 else
1763 c->incw = c->inch = 0;
1764 if(c->flags & PMaxSize) {
1765 c->maxw = size.max_width;
1766 c->maxh = size.max_height;
1767 }
1768 else
1769 c->maxw = c->maxh = 0;
1770 if(c->flags & PMinSize) {
1771 c->minw = size.min_width;
1772 c->minh = size.min_height;
1773 }
1774 else if(c->flags & PBaseSize) {
1775 c->minw = size.base_width;
1776 c->minh = size.base_height;
1777 }
1778 else
1779 c->minw = c->minh = 0;
1780 if(c->flags & PAspect) {
1781 c->minax = size.min_aspect.x;
1782 c->maxax = size.max_aspect.x;
1783 c->minay = size.min_aspect.y;
1784 c->maxay = size.max_aspect.y;
1785 }
1786 else
1787 c->minax = c->maxax = c->minay = c->maxay = 0;
1788 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1789 && c->maxw == c->minw && c->maxh == c->minh);
1790 }
1791
1792 static void
1793 updatetitle(Client *c) {
1794 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1795 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1796 }
1797
1798 /* There's no way to check accesses to destroyed windows, thus those cases are
1799 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1800 * default error handler, which may call exit. */
1801 static int
1802 xerror(Display *dpy, XErrorEvent *ee) {
1803 if(ee->error_code == BadWindow
1804 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1805 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1806 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1807 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1808 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1809 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1810 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1811 return 0;
1812 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1813 ee->request_code, ee->error_code);
1814 return xerrorxlib(dpy, ee); /* may call exit */
1815 }
1816
1817 static int
1818 xerrordummy(Display *dsply, XErrorEvent *ee) {
1819 return 0;
1820 }
1821
1822 /* Startup Error handler to check if another window manager
1823 * is already running. */
1824 static int
1825 xerrorstart(Display *dsply, XErrorEvent *ee) {
1826 otherwm = True;
1827 return -1;
1828 }
1829
1830 static void
1831 view(const char *arg) {
1832 unsigned int i;
1833
1834 for(i = 0; i < ntags; i++)
1835 seltags[i] = arg == NULL;
1836 i = idxoftag(arg);
1837 if(i >= 0 && i < ntags)
1838 seltags[i] = True;
1839 arrange();
1840 }
1841
1842 static void
1843 zoom(const char *arg) {
1844 Client *c;
1845
1846 if(!sel || !isarrange(tile) || sel->isfloating)
1847 return;
1848 if((c = sel) == nexttiled(clients))
1849 if(!(c = nexttiled(c->next)))
1850 return;
1851 detach(c);
1852 attach(c);
1853 focus(c);
1854 arrange();
1855 }
1856
1857 int
1858 main(int argc, char *argv[]) {
1859 if(argc == 2 && !strcmp("-v", argv[1]))
1860 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1861 else if(argc != 1)
1862 eprint("usage: dwm [-v]\n");
1863
1864 setlocale(LC_CTYPE, "");
1865 if(!(dpy = XOpenDisplay(0)))
1866 eprint("dwm: cannot open display\n");
1867 screen = DefaultScreen(dpy);
1868 root = RootWindow(dpy, screen);
1869
1870 checkotherwm();
1871 setup();
1872 drawbar();
1873 scan();
1874 run();
1875 cleanup();
1876
1877 XCloseDisplay(dpy);
1878 return 0;
1879 }