dwm.c (view raw)
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 */
52enum { BarTop, BarBot, BarOff }; /* bar position */
53enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
54enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
55enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
56enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
57
58/* typedefs */
59typedef struct Client Client;
60
61typedef struct {
62 int x, y, w, h;
63 unsigned long norm[ColLast];
64 unsigned long sel[ColLast];
65 Drawable drawable;
66 GC gc;
67 struct {
68 int ascent;
69 int descent;
70 int height;
71 XFontSet set;
72 XFontStruct *xfont;
73 } font;
74} DC; /* draw context */
75
76typedef struct {
77 unsigned long mod;
78 KeySym keysym;
79 void (*func)(const char *arg);
80 const char *arg;
81} Key;
82
83typedef struct {
84 const char *symbol;
85 void (*arrange)(void);
86} Layout;
87
88typedef struct {
89 const char *prop;
90 const char *tags;
91 Bool isfloating;
92} Rule;
93
94typedef struct {
95 regex_t *propregex;
96 regex_t *tagregex;
97} Regs;
98
99/* forward declarations */
100void applyrules(Client *c);
101void arrange(void);
102void attach(Client *c);
103void attachstack(Client *c);
104void ban(Client *c);
105void buttonpress(XEvent *e);
106void checkotherwm(void);
107void cleanup(void);
108void compileregs(void);
109void configure(Client *c);
110void configurenotify(XEvent *e);
111void configurerequest(XEvent *e);
112void destroynotify(XEvent *e);
113void detach(Client *c);
114void detachstack(Client *c);
115void drawbar(void);
116void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
117void drawtext(const char *text, unsigned long col[ColLast]);
118void *emallocz(unsigned int size);
119void enternotify(XEvent *e);
120void eprint(const char *errstr, ...);
121void expose(XEvent *e);
122void floating(void); /* default floating layout */
123void focus(Client *c);
124void focusnext(const char *arg);
125void focusprev(const char *arg);
126Client *getclient(Window w);
127unsigned long getcolor(const char *colstr);
128long getstate(Window w);
129Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
130void grabbuttons(Client *c, Bool focused);
131unsigned int idxoftag(const char *tag);
132void initfont(const char *fontstr);
133Bool isarrange(void (*func)());
134Bool isoccupied(unsigned int t);
135Bool isprotodel(Client *c);
136Bool isvisible(Client *c);
137void keypress(XEvent *e);
138void killclient(const char *arg);
139void leavenotify(XEvent *e);
140void manage(Window w, XWindowAttributes *wa);
141void mappingnotify(XEvent *e);
142void maprequest(XEvent *e);
143void movemouse(Client *c);
144Client *nexttiled(Client *c);
145void propertynotify(XEvent *e);
146void quit(const char *arg);
147void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
148void resizemouse(Client *c);
149void restack(void);
150void run(void);
151void scan(void);
152void setclientstate(Client *c, long state);
153void setlayout(const char *arg);
154void setmwfact(const char *arg);
155void setup(void);
156void spawn(const char *arg);
157void tag(const char *arg);
158unsigned int textnw(const char *text, unsigned int len);
159unsigned int textw(const char *text);
160void tile(void);
161void togglebar(const char *arg);
162void togglefloating(const char *arg);
163void togglemax(const char *arg);
164void toggletag(const char *arg);
165void toggleview(const char *arg);
166void unban(Client *c);
167void unmanage(Client *c);
168void unmapnotify(XEvent *e);
169void updatebarpos(void);
170void updatesizehints(Client *c);
171void updatetitle(Client *c);
172void view(const char *arg);
173int xerror(Display *dpy, XErrorEvent *ee);
174int xerrordummy(Display *dsply, XErrorEvent *ee);
175int xerrorstart(Display *dsply, XErrorEvent *ee);
176void zoom(const char *arg);
177
178/* variables */
179char stext[256];
180double mwfact;
181int screen, sx, sy, sw, sh, wax, way, waw, wah;
182int (*xerrorxlib)(Display *, XErrorEvent *);
183unsigned int bh, bpos;
184unsigned int blw = 0;
185unsigned int ltidx = 0; /* default */
186unsigned int nlayouts = 0;
187unsigned int nrules = 0;
188unsigned int numlockmask = 0;
189void (*handler[LASTEvent]) (XEvent *) = {
190 [ButtonPress] = buttonpress,
191 [ConfigureRequest] = configurerequest,
192 [ConfigureNotify] = configurenotify,
193 [DestroyNotify] = destroynotify,
194 [EnterNotify] = enternotify,
195 [LeaveNotify] = leavenotify,
196 [Expose] = expose,
197 [KeyPress] = keypress,
198 [MappingNotify] = mappingnotify,
199 [MapRequest] = maprequest,
200 [PropertyNotify] = propertynotify,
201 [UnmapNotify] = unmapnotify
202};
203Atom wmatom[WMLast], netatom[NetLast];
204Bool otherwm, readin;
205Bool running = True;
206Bool selscreen = True;
207Client *clients = NULL;
208Client *sel = NULL;
209Client *stack = NULL;
210Cursor cursor[CurLast];
211Display *dpy;
212DC dc = {0};
213Window barwin, root;
214Regs *regs = NULL;
215
216/* configuration, allows nested code to access above variables */
217#include "config.h"
218
219/* Statically define the number of tags. */
220unsigned int ntags = sizeof tags / sizeof tags[0];
221Bool seltags[sizeof tags / sizeof tags[0]] = {[0] = True};
222
223struct Client {
224 char name[256];
225 int x, y, w, h;
226 int rx, ry, rw, rh; /* revert geometry */
227 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
228 int minax, maxax, minay, maxay;
229 long flags;
230 unsigned int border, oldborder;
231 Bool isbanned, isfixed, ismax, isfloating, wasfloating;
232 Bool tags[sizeof tags / sizeof tags[0]];
233 Client *next;
234 Client *prev;
235 Client *snext;
236 Window win;
237};
238
239/* functions*/
240void
241applyrules(Client *c) {
242 static char buf[512];
243 unsigned int i, j;
244 regmatch_t tmp;
245 Bool matched = False;
246 XClassHint ch = { 0 };
247
248 /* rule matching */
249 XGetClassHint(dpy, c->win, &ch);
250 snprintf(buf, sizeof buf, "%s:%s:%s",
251 ch.res_class ? ch.res_class : "",
252 ch.res_name ? ch.res_name : "", c->name);
253 for(i = 0; i < nrules; i++)
254 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
255 c->isfloating = rules[i].isfloating;
256 for(j = 0; regs[i].tagregex && j < ntags; j++) {
257 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
258 matched = True;
259 c->tags[j] = True;
260 }
261 }
262 }
263 if(ch.res_class)
264 XFree(ch.res_class);
265 if(ch.res_name)
266 XFree(ch.res_name);
267 if(!matched)
268 for(i = 0; i < ntags; i++)
269 c->tags[i] = seltags[i];
270}
271
272void
273arrange(void) {
274 Client *c;
275
276 for(c = clients; c; c = c->next)
277 if(isvisible(c))
278 unban(c);
279 else
280 ban(c);
281 layouts[ltidx].arrange();
282 focus(NULL);
283 restack();
284}
285
286void
287attach(Client *c) {
288 if(clients)
289 clients->prev = c;
290 c->next = clients;
291 clients = c;
292}
293
294void
295attachstack(Client *c) {
296 c->snext = stack;
297 stack = c;
298}
299
300void
301ban(Client *c) {
302 if(c->isbanned)
303 return;
304 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
305 c->isbanned = True;
306}
307
308void
309buttonpress(XEvent *e) {
310 unsigned int i, x;
311 Client *c;
312 XButtonPressedEvent *ev = &e->xbutton;
313
314 if(barwin == ev->window) {
315 x = 0;
316 for(i = 0; i < ntags; i++) {
317 x += textw(tags[i]);
318 if(ev->x < x) {
319 if(ev->button == Button1) {
320 if(ev->state & MODKEY)
321 tag(tags[i]);
322 else
323 view(tags[i]);
324 }
325 else if(ev->button == Button3) {
326 if(ev->state & MODKEY)
327 toggletag(tags[i]);
328 else
329 toggleview(tags[i]);
330 }
331 return;
332 }
333 }
334 if((ev->x < x + blw) && ev->button == Button1)
335 setlayout(NULL);
336 }
337 else if((c = getclient(ev->window))) {
338 focus(c);
339 if(CLEANMASK(ev->state) != MODKEY)
340 return;
341 if(ev->button == Button1) {
342 if(isarrange(floating) || c->isfloating)
343 restack();
344 else
345 togglefloating(NULL);
346 movemouse(c);
347 }
348 else if(ev->button == Button2) {
349 if(ISTILE && !c->isfixed && c->isfloating)
350 togglefloating(NULL);
351 else
352 zoom(NULL);
353 }
354 else if(ev->button == Button3 && !c->isfixed) {
355 if(isarrange(floating) || c->isfloating)
356 restack();
357 else
358 togglefloating(NULL);
359 resizemouse(c);
360 }
361 }
362}
363
364void
365checkotherwm(void) {
366 otherwm = False;
367 XSetErrorHandler(xerrorstart);
368
369 /* this causes an error if some other window manager is running */
370 XSelectInput(dpy, root, SubstructureRedirectMask);
371 XSync(dpy, False);
372 if(otherwm)
373 eprint("dwm: another window manager is already running\n");
374 XSync(dpy, False);
375 XSetErrorHandler(NULL);
376 xerrorxlib = XSetErrorHandler(xerror);
377 XSync(dpy, False);
378}
379
380void
381cleanup(void) {
382 close(STDIN_FILENO);
383 while(stack) {
384 unban(stack);
385 unmanage(stack);
386 }
387 if(dc.font.set)
388 XFreeFontSet(dpy, dc.font.set);
389 else
390 XFreeFont(dpy, dc.font.xfont);
391 XUngrabKey(dpy, AnyKey, AnyModifier, root);
392 XFreePixmap(dpy, dc.drawable);
393 XFreeGC(dpy, dc.gc);
394 XDestroyWindow(dpy, barwin);
395 XFreeCursor(dpy, cursor[CurNormal]);
396 XFreeCursor(dpy, cursor[CurResize]);
397 XFreeCursor(dpy, cursor[CurMove]);
398 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
399 XSync(dpy, False);
400}
401
402void
403compileregs(void) {
404 unsigned int i;
405 regex_t *reg;
406
407 if(regs)
408 return;
409 nrules = sizeof rules / sizeof rules[0];
410 regs = emallocz(nrules * sizeof(Regs));
411 for(i = 0; i < nrules; i++) {
412 if(rules[i].prop) {
413 reg = emallocz(sizeof(regex_t));
414 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
415 free(reg);
416 else
417 regs[i].propregex = reg;
418 }
419 if(rules[i].tags) {
420 reg = emallocz(sizeof(regex_t));
421 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
422 free(reg);
423 else
424 regs[i].tagregex = reg;
425 }
426 }
427}
428
429void
430configure(Client *c) {
431 XConfigureEvent ce;
432
433 ce.type = ConfigureNotify;
434 ce.display = dpy;
435 ce.event = c->win;
436 ce.window = c->win;
437 ce.x = c->x;
438 ce.y = c->y;
439 ce.width = c->w;
440 ce.height = c->h;
441 ce.border_width = c->border;
442 ce.above = None;
443 ce.override_redirect = False;
444 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
445}
446
447void
448configurenotify(XEvent *e) {
449 XConfigureEvent *ev = &e->xconfigure;
450
451 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
452 sw = ev->width;
453 sh = ev->height;
454 XFreePixmap(dpy, dc.drawable);
455 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
456 XResizeWindow(dpy, barwin, sw, bh);
457 updatebarpos();
458 arrange();
459 }
460}
461
462void
463configurerequest(XEvent *e) {
464 Client *c;
465 XConfigureRequestEvent *ev = &e->xconfigurerequest;
466 XWindowChanges wc;
467
468 if((c = getclient(ev->window))) {
469 c->ismax = False;
470 if(ev->value_mask & CWBorderWidth)
471 c->border = ev->border_width;
472 if(c->isfixed || c->isfloating || isarrange(floating)) {
473 if(ev->value_mask & CWX)
474 c->x = ev->x;
475 if(ev->value_mask & CWY)
476 c->y = ev->y;
477 if(ev->value_mask & CWWidth)
478 c->w = ev->width;
479 if(ev->value_mask & CWHeight)
480 c->h = ev->height;
481 if((c->x + c->w) > sw && c->isfloating)
482 c->x = sw / 2 - c->w / 2; /* center in x direction */
483 if((c->y + c->h) > sh && c->isfloating)
484 c->y = sh / 2 - c->h / 2; /* center in y direction */
485 if((ev->value_mask & (CWX | CWY))
486 && !(ev->value_mask & (CWWidth | CWHeight)))
487 configure(c);
488 if(isvisible(c))
489 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
490 }
491 else
492 configure(c);
493 }
494 else {
495 wc.x = ev->x;
496 wc.y = ev->y;
497 wc.width = ev->width;
498 wc.height = ev->height;
499 wc.border_width = ev->border_width;
500 wc.sibling = ev->above;
501 wc.stack_mode = ev->detail;
502 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
503 }
504 XSync(dpy, False);
505}
506
507void
508destroynotify(XEvent *e) {
509 Client *c;
510 XDestroyWindowEvent *ev = &e->xdestroywindow;
511
512 if((c = getclient(ev->window)))
513 unmanage(c);
514}
515
516void
517detach(Client *c) {
518 if(c->prev)
519 c->prev->next = c->next;
520 if(c->next)
521 c->next->prev = c->prev;
522 if(c == clients)
523 clients = c->next;
524 c->next = c->prev = NULL;
525}
526
527void
528detachstack(Client *c) {
529 Client **tc;
530
531 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
532 *tc = c->snext;
533}
534
535void
536drawbar(void) {
537 int i, x;
538
539 dc.x = dc.y = 0;
540 for(i = 0; i < ntags; i++) {
541 dc.w = textw(tags[i]);
542 if(seltags[i]) {
543 drawtext(tags[i], dc.sel);
544 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
545 }
546 else {
547 drawtext(tags[i], dc.norm);
548 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
549 }
550 dc.x += dc.w;
551 }
552 dc.w = blw;
553 drawtext(layouts[ltidx].symbol, dc.norm);
554 x = dc.x + dc.w;
555 dc.w = textw(stext);
556 dc.x = sw - dc.w;
557 if(dc.x < x) {
558 dc.x = x;
559 dc.w = sw - x;
560 }
561 drawtext(stext, dc.norm);
562 if((dc.w = dc.x - x) > bh) {
563 dc.x = x;
564 if(sel) {
565 drawtext(sel->name, dc.sel);
566 drawsquare(sel->ismax, sel->isfloating, dc.sel);
567 }
568 else
569 drawtext(NULL, dc.norm);
570 }
571 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
572 XSync(dpy, False);
573}
574
575void
576drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
577 int x;
578 XGCValues gcv;
579 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
580
581 gcv.foreground = col[ColFG];
582 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
583 x = (dc.font.ascent + dc.font.descent + 2) / 4;
584 r.x = dc.x + 1;
585 r.y = dc.y + 1;
586 if(filled) {
587 r.width = r.height = x + 1;
588 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
589 }
590 else if(empty) {
591 r.width = r.height = x;
592 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
593 }
594}
595
596void
597drawtext(const char *text, unsigned long col[ColLast]) {
598 int x, y, w, h;
599 static char buf[256];
600 unsigned int len, olen;
601 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
602
603 XSetForeground(dpy, dc.gc, col[ColBG]);
604 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
605 if(!text)
606 return;
607 w = 0;
608 olen = len = strlen(text);
609 if(len >= sizeof buf)
610 len = sizeof buf - 1;
611 memcpy(buf, text, len);
612 buf[len] = 0;
613 h = dc.font.ascent + dc.font.descent;
614 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
615 x = dc.x + (h / 2);
616 /* shorten text if necessary */
617 while(len && (w = textnw(buf, len)) > dc.w - h)
618 buf[--len] = 0;
619 if(len < olen) {
620 if(len > 1)
621 buf[len - 1] = '.';
622 if(len > 2)
623 buf[len - 2] = '.';
624 if(len > 3)
625 buf[len - 3] = '.';
626 }
627 if(w > dc.w)
628 return; /* too long */
629 XSetForeground(dpy, dc.gc, col[ColFG]);
630 if(dc.font.set)
631 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
632 else
633 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
634}
635
636void *
637emallocz(unsigned int size) {
638 void *res = calloc(1, size);
639
640 if(!res)
641 eprint("fatal: could not malloc() %u bytes\n", size);
642 return res;
643}
644
645void
646enternotify(XEvent *e) {
647 Client *c;
648 XCrossingEvent *ev = &e->xcrossing;
649
650 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
651 return;
652 if((c = getclient(ev->window)))
653 focus(c);
654 else if(ev->window == root) {
655 selscreen = True;
656 focus(NULL);
657 }
658}
659
660void
661eprint(const char *errstr, ...) {
662 va_list ap;
663
664 va_start(ap, errstr);
665 vfprintf(stderr, errstr, ap);
666 va_end(ap);
667 exit(EXIT_FAILURE);
668}
669
670void
671expose(XEvent *e) {
672 XExposeEvent *ev = &e->xexpose;
673
674 if(ev->count == 0) {
675 if(barwin == ev->window)
676 drawbar();
677 }
678}
679
680void
681floating(void) { /* default floating layout */
682 Client *c;
683
684 for(c = clients; c; c = c->next)
685 if(isvisible(c))
686 resize(c, c->x, c->y, c->w, c->h, True);
687}
688
689void
690focus(Client *c) {
691 if((!c && selscreen) || (c && !isvisible(c)))
692 for(c = stack; c && !isvisible(c); c = c->snext);
693 if(sel && sel != c) {
694 grabbuttons(sel, False);
695 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
696 }
697 if(c) {
698 detachstack(c);
699 attachstack(c);
700 grabbuttons(c, True);
701 }
702 sel = c;
703 drawbar();
704 if(!selscreen)
705 return;
706 if(c) {
707 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
708 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
709 }
710 else
711 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
712}
713
714void
715focusnext(const char *arg) {
716 Client *c;
717
718 if(!sel)
719 return;
720 for(c = sel->next; c && !isvisible(c); c = c->next);
721 if(!c)
722 for(c = clients; c && !isvisible(c); c = c->next);
723 if(c) {
724 focus(c);
725 restack();
726 }
727}
728
729void
730focusprev(const char *arg) {
731 Client *c;
732
733 if(!sel)
734 return;
735 for(c = sel->prev; c && !isvisible(c); c = c->prev);
736 if(!c) {
737 for(c = clients; c && c->next; c = c->next);
738 for(; c && !isvisible(c); c = c->prev);
739 }
740 if(c) {
741 focus(c);
742 restack();
743 }
744}
745
746Client *
747getclient(Window w) {
748 Client *c;
749
750 for(c = clients; c && c->win != w; c = c->next);
751 return c;
752}
753
754unsigned long
755getcolor(const char *colstr) {
756 Colormap cmap = DefaultColormap(dpy, screen);
757 XColor color;
758
759 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
760 eprint("error, cannot allocate color '%s'\n", colstr);
761 return color.pixel;
762}
763
764long
765getstate(Window w) {
766 int format, status;
767 long result = -1;
768 unsigned char *p = NULL;
769 unsigned long n, extra;
770 Atom real;
771
772 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
773 &real, &format, &n, &extra, (unsigned char **)&p);
774 if(status != Success)
775 return -1;
776 if(n != 0)
777 result = *p;
778 XFree(p);
779 return result;
780}
781
782Bool
783gettextprop(Window w, Atom atom, char *text, unsigned int size) {
784 char **list = NULL;
785 int n;
786 XTextProperty name;
787
788 if(!text || size == 0)
789 return False;
790 text[0] = '\0';
791 XGetTextProperty(dpy, w, &name, atom);
792 if(!name.nitems)
793 return False;
794 if(name.encoding == XA_STRING)
795 strncpy(text, (char *)name.value, size - 1);
796 else {
797 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
798 && n > 0 && *list)
799 {
800 strncpy(text, *list, size - 1);
801 XFreeStringList(list);
802 }
803 }
804 text[size - 1] = '\0';
805 XFree(name.value);
806 return True;
807}
808
809void
810grabbuttons(Client *c, Bool focused) {
811 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
812
813 if(focused) {
814 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
815 GrabModeAsync, GrabModeSync, None, None);
816 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
817 GrabModeAsync, GrabModeSync, None, None);
818 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
819 GrabModeAsync, GrabModeSync, None, None);
820 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
821 GrabModeAsync, GrabModeSync, None, None);
822
823 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
824 GrabModeAsync, GrabModeSync, None, None);
825 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
826 GrabModeAsync, GrabModeSync, None, None);
827 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
828 GrabModeAsync, GrabModeSync, None, None);
829 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
830 GrabModeAsync, GrabModeSync, None, None);
831
832 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
833 GrabModeAsync, GrabModeSync, None, None);
834 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
835 GrabModeAsync, GrabModeSync, None, None);
836 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
837 GrabModeAsync, GrabModeSync, None, None);
838 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
839 GrabModeAsync, GrabModeSync, None, None);
840 }
841 else
842 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
843 GrabModeAsync, GrabModeSync, None, None);
844}
845
846unsigned int
847idxoftag(const char *tag) {
848 unsigned int i;
849
850 for(i = 0; i < ntags; i++)
851 if(tags[i] == tag)
852 return i;
853 return 0;
854}
855
856void
857initfont(const char *fontstr) {
858 char *def, **missing;
859 int i, n;
860
861 missing = NULL;
862 if(dc.font.set)
863 XFreeFontSet(dpy, dc.font.set);
864 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
865 if(missing) {
866 while(n--)
867 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
868 XFreeStringList(missing);
869 }
870 if(dc.font.set) {
871 XFontSetExtents *font_extents;
872 XFontStruct **xfonts;
873 char **font_names;
874 dc.font.ascent = dc.font.descent = 0;
875 font_extents = XExtentsOfFontSet(dc.font.set);
876 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
877 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
878 if(dc.font.ascent < (*xfonts)->ascent)
879 dc.font.ascent = (*xfonts)->ascent;
880 if(dc.font.descent < (*xfonts)->descent)
881 dc.font.descent = (*xfonts)->descent;
882 xfonts++;
883 }
884 }
885 else {
886 if(dc.font.xfont)
887 XFreeFont(dpy, dc.font.xfont);
888 dc.font.xfont = NULL;
889 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
890 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
891 eprint("error, cannot load font: '%s'\n", fontstr);
892 dc.font.ascent = dc.font.xfont->ascent;
893 dc.font.descent = dc.font.xfont->descent;
894 }
895 dc.font.height = dc.font.ascent + dc.font.descent;
896}
897
898Bool
899isarrange(void (*func)())
900{
901 return func == layouts[ltidx].arrange;
902}
903
904Bool
905isoccupied(unsigned int t) {
906 Client *c;
907
908 for(c = clients; c; c = c->next)
909 if(c->tags[t])
910 return True;
911 return False;
912}
913
914Bool
915isprotodel(Client *c) {
916 int i, n;
917 Atom *protocols;
918 Bool ret = False;
919
920 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
921 for(i = 0; !ret && i < n; i++)
922 if(protocols[i] == wmatom[WMDelete])
923 ret = True;
924 XFree(protocols);
925 }
926 return ret;
927}
928
929Bool
930isvisible(Client *c) {
931 unsigned int i;
932
933 for(i = 0; i < ntags; i++)
934 if(c->tags[i] && seltags[i])
935 return True;
936 return False;
937}
938
939void
940keypress(XEvent *e) {
941 KEYS
942 unsigned int len = sizeof keys / sizeof keys[0];
943 unsigned int i;
944 KeyCode code;
945 KeySym keysym;
946 XKeyEvent *ev;
947
948 if(!e) { /* grabkeys */
949 XUngrabKey(dpy, AnyKey, AnyModifier, root);
950 for(i = 0; i < len; i++) {
951 code = XKeysymToKeycode(dpy, keys[i].keysym);
952 XGrabKey(dpy, code, keys[i].mod, root, True,
953 GrabModeAsync, GrabModeAsync);
954 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
955 GrabModeAsync, GrabModeAsync);
956 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
957 GrabModeAsync, GrabModeAsync);
958 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
959 GrabModeAsync, GrabModeAsync);
960 }
961 return;
962 }
963 ev = &e->xkey;
964 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
965 for(i = 0; i < len; i++)
966 if(keysym == keys[i].keysym
967 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
968 {
969 if(keys[i].func)
970 keys[i].func(keys[i].arg);
971 }
972}
973
974void
975killclient(const char *arg) {
976 XEvent ev;
977
978 if(!sel)
979 return;
980 if(isprotodel(sel)) {
981 ev.type = ClientMessage;
982 ev.xclient.window = sel->win;
983 ev.xclient.message_type = wmatom[WMProtocols];
984 ev.xclient.format = 32;
985 ev.xclient.data.l[0] = wmatom[WMDelete];
986 ev.xclient.data.l[1] = CurrentTime;
987 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
988 }
989 else
990 XKillClient(dpy, sel->win);
991}
992
993void
994leavenotify(XEvent *e) {
995 XCrossingEvent *ev = &e->xcrossing;
996
997 if((ev->window == root) && !ev->same_screen) {
998 selscreen = False;
999 focus(NULL);
1000 }
1001}
1002
1003void
1004manage(Window w, XWindowAttributes *wa) {
1005 unsigned int i;
1006 Client *c, *t = NULL;
1007 Window trans;
1008 Status rettrans;
1009 XWindowChanges wc;
1010
1011 c = emallocz(sizeof(Client));
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
1060void
1061mappingnotify(XEvent *e) {
1062 XMappingEvent *ev = &e->xmapping;
1063
1064 XRefreshKeyboardMapping(ev);
1065 if(ev->request == MappingKeyboard)
1066 keypress(NULL);
1067}
1068
1069void
1070maprequest(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
1082void
1083movemouse(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
1125Client *
1126nexttiled(Client *c) {
1127 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1128 return c;
1129}
1130
1131void
1132propertynotify(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
1159void
1160quit(const char *arg) {
1161 readin = running = False;
1162}
1163
1164void
1165resize(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
1227void
1228resizemouse(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
1266void
1267restack(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
1295void
1296run(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
1343void
1344scan(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
1370void
1371setclientstate(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
1378void
1379setlayout(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
1400void
1401setmwfact(const char *arg) {
1402 double delta;
1403
1404 if(!ISTILE)
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
1422void
1423setup(void) {
1424 int d;
1425 unsigned int i, j, mask;
1426 Window w;
1427 XModifierKeymap *modmap;
1428 XSetWindowAttributes wa;
1429
1430 /* init atoms */
1431 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1432 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1433 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1434 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1435 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1436 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1437 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1438 PropModeReplace, (unsigned char *) netatom, NetLast);
1439
1440 /* init cursors */
1441 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1442 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1443 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1444
1445 /* init geometry */
1446 sx = sy = 0;
1447 sw = DisplayWidth(dpy, screen);
1448 sh = DisplayHeight(dpy, screen);
1449
1450 /* init modifier map */
1451 modmap = XGetModifierMapping(dpy);
1452 for(i = 0; i < 8; i++)
1453 for(j = 0; j < modmap->max_keypermod; j++) {
1454 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1455 == XKeysymToKeycode(dpy, XK_Num_Lock))
1456 numlockmask = (1 << i);
1457 }
1458 XFreeModifiermap(modmap);
1459
1460 /* select for events */
1461 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1462 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1463 wa.cursor = cursor[CurNormal];
1464 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1465 XSelectInput(dpy, root, wa.event_mask);
1466
1467 /* grab keys */
1468 keypress(NULL);
1469
1470 /* init tags */
1471 compileregs();
1472
1473 /* init appearance */
1474 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1475 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1476 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1477 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1478 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1479 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1480 initfont(FONT);
1481 dc.h = bh = dc.font.height + 2;
1482
1483 /* init layouts */
1484 mwfact = MWFACT;
1485 nlayouts = sizeof layouts / sizeof layouts[0];
1486 for(blw = i = 0; i < nlayouts; i++) {
1487 j = textw(layouts[i].symbol);
1488 if(j > blw)
1489 blw = j;
1490 }
1491
1492 /* init bar */
1493 bpos = BARPOS;
1494 wa.override_redirect = 1;
1495 wa.background_pixmap = ParentRelative;
1496 wa.event_mask = ButtonPressMask | ExposureMask;
1497 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1498 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1499 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1500 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1501 updatebarpos();
1502 XMapRaised(dpy, barwin);
1503 strcpy(stext, "dwm-"VERSION);
1504 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1505 dc.gc = XCreateGC(dpy, root, 0, 0);
1506 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1507 if(!dc.font.set)
1508 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1509
1510 /* multihead support */
1511 selscreen = XQueryPointer(dpy, root, &w, &w, &d, &d, &d, &d, &mask);
1512}
1513
1514void
1515spawn(const char *arg) {
1516 static char *shell = NULL;
1517
1518 if(!shell && !(shell = getenv("SHELL")))
1519 shell = "/bin/sh";
1520 if(!arg)
1521 return;
1522 /* The double-fork construct avoids zombie processes and keeps the code
1523 * clean from stupid signal handlers. */
1524 if(fork() == 0) {
1525 if(fork() == 0) {
1526 if(dpy)
1527 close(ConnectionNumber(dpy));
1528 setsid();
1529 execl(shell, shell, "-c", arg, (char *)NULL);
1530 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1531 perror(" failed");
1532 }
1533 exit(0);
1534 }
1535 wait(0);
1536}
1537
1538void
1539tag(const char *arg) {
1540 unsigned int i;
1541
1542 if(!sel)
1543 return;
1544 for(i = 0; i < ntags; i++)
1545 sel->tags[i] = arg == NULL;
1546 i = idxoftag(arg);
1547 if(i >= 0 && i < ntags)
1548 sel->tags[i] = True;
1549 arrange();
1550}
1551
1552unsigned int
1553textnw(const char *text, unsigned int len) {
1554 XRectangle r;
1555
1556 if(dc.font.set) {
1557 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1558 return r.width;
1559 }
1560 return XTextWidth(dc.font.xfont, text, len);
1561}
1562
1563unsigned int
1564textw(const char *text) {
1565 return textnw(text, strlen(text)) + dc.font.height;
1566}
1567
1568void
1569tile(void) {
1570 unsigned int i, n, nx, ny, nw, nh, mw, th;
1571 Client *c, *mc;
1572
1573 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1574 n++;
1575
1576 /* window geoms */
1577 mw = (n == 1) ? waw : mwfact * waw;
1578 th = (n > 1) ? wah / (n - 1) : 0;
1579 if(n > 1 && th < bh)
1580 th = wah;
1581
1582 nx = wax;
1583 ny = way;
1584 nw = 0; /* gcc stupidity requires this */
1585 for(i = 0, c = mc = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1586 c->ismax = False;
1587 if(i == 0) { /* master */
1588 nw = mw - 2 * c->border;
1589 nh = wah - 2 * c->border;
1590 }
1591 else { /* tile window */
1592 if(i == 1) {
1593 ny = way;
1594 nx += mc->w + 2 * mc->border;
1595 nw = waw - nx - 2 * c->border;
1596 }
1597 if(i + 1 == n) /* remainder */
1598 nh = (way + wah) - ny - 2 * c->border;
1599 else
1600 nh = th - 2 * c->border;
1601 }
1602 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1603 if(n > 1 && th != wah)
1604 ny = c->y + c->h + 2 * c->border;
1605 }
1606}
1607
1608void
1609togglebar(const char *arg) {
1610 if(bpos == BarOff)
1611 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1612 else
1613 bpos = BarOff;
1614 updatebarpos();
1615 arrange();
1616}
1617
1618void
1619togglefloating(const char *arg) {
1620 if(!sel)
1621 return;
1622 sel->isfloating = !sel->isfloating;
1623 if(sel->isfloating)
1624 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1625 arrange();
1626}
1627
1628void
1629togglemax(const char *arg) {
1630 XEvent ev;
1631
1632 if(!sel || sel->isfixed)
1633 return;
1634 if((sel->ismax = !sel->ismax)) {
1635 if(isarrange(floating) || sel->isfloating)
1636 sel->wasfloating = True;
1637 else {
1638 togglefloating(NULL);
1639 sel->wasfloating = False;
1640 }
1641 sel->rx = sel->x;
1642 sel->ry = sel->y;
1643 sel->rw = sel->w;
1644 sel->rh = sel->h;
1645 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1646 }
1647 else {
1648 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1649 if(!sel->wasfloating)
1650 togglefloating(NULL);
1651 }
1652 drawbar();
1653 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1654}
1655
1656void
1657toggletag(const char *arg) {
1658 unsigned int i, j;
1659
1660 if(!sel)
1661 return;
1662 i = idxoftag(arg);
1663 sel->tags[i] = !sel->tags[i];
1664 for(j = 0; j < ntags && !sel->tags[j]; j++);
1665 if(j == ntags)
1666 sel->tags[i] = True;
1667 arrange();
1668}
1669
1670void
1671toggleview(const char *arg) {
1672 unsigned int i, j;
1673
1674 i = idxoftag(arg);
1675 seltags[i] = !seltags[i];
1676 for(j = 0; j < ntags && !seltags[j]; j++);
1677 if(j == ntags)
1678 seltags[i] = True; /* at least one tag must be viewed */
1679 arrange();
1680}
1681
1682void
1683unban(Client *c) {
1684 if(!c->isbanned)
1685 return;
1686 XMoveWindow(dpy, c->win, c->x, c->y);
1687 c->isbanned = False;
1688}
1689
1690void
1691unmanage(Client *c) {
1692 XWindowChanges wc;
1693
1694 wc.border_width = c->oldborder;
1695 /* The server grab construct avoids race conditions. */
1696 XGrabServer(dpy);
1697 XSetErrorHandler(xerrordummy);
1698 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1699 detach(c);
1700 detachstack(c);
1701 if(sel == c)
1702 focus(NULL);
1703 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1704 setclientstate(c, WithdrawnState);
1705 free(c);
1706 XSync(dpy, False);
1707 XSetErrorHandler(xerror);
1708 XUngrabServer(dpy);
1709 arrange();
1710}
1711
1712void
1713unmapnotify(XEvent *e) {
1714 Client *c;
1715 XUnmapEvent *ev = &e->xunmap;
1716
1717 if((c = getclient(ev->window)))
1718 unmanage(c);
1719}
1720
1721void
1722updatebarpos(void) {
1723 XEvent ev;
1724
1725 wax = sx;
1726 way = sy;
1727 wah = sh;
1728 waw = sw;
1729 switch(bpos) {
1730 default:
1731 wah -= bh;
1732 way += bh;
1733 XMoveWindow(dpy, barwin, sx, sy);
1734 break;
1735 case BarBot:
1736 wah -= bh;
1737 XMoveWindow(dpy, barwin, sx, sy + wah);
1738 break;
1739 case BarOff:
1740 XMoveWindow(dpy, barwin, sx, sy - bh);
1741 break;
1742 }
1743 XSync(dpy, False);
1744 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1745}
1746
1747void
1748updatesizehints(Client *c) {
1749 long msize;
1750 XSizeHints size;
1751
1752 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1753 size.flags = PSize;
1754 c->flags = size.flags;
1755 if(c->flags & PBaseSize) {
1756 c->basew = size.base_width;
1757 c->baseh = size.base_height;
1758 }
1759 else if(c->flags & PMinSize) {
1760 c->basew = size.min_width;
1761 c->baseh = size.min_height;
1762 }
1763 else
1764 c->basew = c->baseh = 0;
1765 if(c->flags & PResizeInc) {
1766 c->incw = size.width_inc;
1767 c->inch = size.height_inc;
1768 }
1769 else
1770 c->incw = c->inch = 0;
1771 if(c->flags & PMaxSize) {
1772 c->maxw = size.max_width;
1773 c->maxh = size.max_height;
1774 }
1775 else
1776 c->maxw = c->maxh = 0;
1777 if(c->flags & PMinSize) {
1778 c->minw = size.min_width;
1779 c->minh = size.min_height;
1780 }
1781 else if(c->flags & PBaseSize) {
1782 c->minw = size.base_width;
1783 c->minh = size.base_height;
1784 }
1785 else
1786 c->minw = c->minh = 0;
1787 if(c->flags & PAspect) {
1788 c->minax = size.min_aspect.x;
1789 c->maxax = size.max_aspect.x;
1790 c->minay = size.min_aspect.y;
1791 c->maxay = size.max_aspect.y;
1792 }
1793 else
1794 c->minax = c->maxax = c->minay = c->maxay = 0;
1795 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1796 && c->maxw == c->minw && c->maxh == c->minh);
1797}
1798
1799void
1800updatetitle(Client *c) {
1801 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1802 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1803}
1804
1805/* There's no way to check accesses to destroyed windows, thus those cases are
1806 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1807 * default error handler, which may call exit. */
1808int
1809xerror(Display *dpy, XErrorEvent *ee) {
1810 if(ee->error_code == BadWindow
1811 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1812 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1813 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1814 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1815 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1816 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1817 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1818 return 0;
1819 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1820 ee->request_code, ee->error_code);
1821 return xerrorxlib(dpy, ee); /* may call exit */
1822}
1823
1824int
1825xerrordummy(Display *dsply, XErrorEvent *ee) {
1826 return 0;
1827}
1828
1829/* Startup Error handler to check if another window manager
1830 * is already running. */
1831int
1832xerrorstart(Display *dsply, XErrorEvent *ee) {
1833 otherwm = True;
1834 return -1;
1835}
1836
1837void
1838view(const char *arg) {
1839 unsigned int i;
1840
1841 for(i = 0; i < ntags; i++)
1842 seltags[i] = arg == NULL;
1843 i = idxoftag(arg);
1844 if(i >= 0 && i < ntags)
1845 seltags[i] = True;
1846 arrange();
1847}
1848
1849void
1850zoom(const char *arg) {
1851 Client *c;
1852
1853 if(!sel || !ISTILE || sel->isfloating)
1854 return;
1855 if((c = sel) == nexttiled(clients))
1856 if(!(c = nexttiled(c->next)))
1857 return;
1858 detach(c);
1859 attach(c);
1860 focus(c);
1861 arrange();
1862}
1863
1864int
1865main(int argc, char *argv[]) {
1866 if(argc == 2 && !strcmp("-v", argv[1]))
1867 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1868 else if(argc != 1)
1869 eprint("usage: dwm [-v]\n");
1870
1871 setlocale(LC_CTYPE, "");
1872 if(!(dpy = XOpenDisplay(0)))
1873 eprint("dwm: cannot open display\n");
1874 screen = DefaultScreen(dpy);
1875 root = RootWindow(dpy, screen);
1876
1877 checkotherwm();
1878 setup();
1879 drawbar();
1880 scan();
1881 run();
1882 cleanup();
1883
1884 XCloseDisplay(dpy);
1885 return 0;
1886}