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;
60struct Client {
61 char name[256];
62 int x, y, w, h;
63 int rx, ry, rw, rh; /* revert geometry */
64 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
65 int minax, maxax, minay, maxay;
66 long flags;
67 unsigned int border, oldborder;
68 Bool isbanned, isfixed, ismax, isfloating, wasfloating;
69 Bool *tags;
70 Client *next;
71 Client *prev;
72 Client *snext;
73 Window win;
74};
75
76typedef struct {
77 int x, y, w, h;
78 unsigned long norm[ColLast];
79 unsigned long sel[ColLast];
80 Drawable drawable;
81 GC gc;
82 struct {
83 int ascent;
84 int descent;
85 int height;
86 XFontSet set;
87 XFontStruct *xfont;
88 } font;
89} DC; /* draw context */
90
91typedef struct {
92 unsigned long mod;
93 KeySym keysym;
94 void (*func)(const char *arg);
95 const char *arg;
96} Key;
97
98typedef struct {
99 const char *symbol;
100 void (*arrange)(void);
101} Layout;
102
103typedef struct {
104 const char *prop;
105 const char *tags;
106 Bool isfloating;
107} Rule;
108
109typedef struct {
110 regex_t *propregex;
111 regex_t *tagregex;
112} Regs;
113
114/* function declarations */
115void applyrules(Client *c);
116void arrange(void);
117void attach(Client *c);
118void attachstack(Client *c);
119void ban(Client *c);
120void buttonpress(XEvent *e);
121void checkotherwm(void);
122void cleanup(void);
123void compileregs(void);
124void configure(Client *c);
125void configurenotify(XEvent *e);
126void configurerequest(XEvent *e);
127void destroynotify(XEvent *e);
128void detach(Client *c);
129void detachstack(Client *c);
130void drawbar(void);
131void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
132void drawtext(const char *text, unsigned long col[ColLast]);
133void *emallocz(unsigned int size);
134void enternotify(XEvent *e);
135void eprint(const char *errstr, ...);
136void expose(XEvent *e);
137void floating(void); /* default floating layout */
138void focus(Client *c);
139void focusnext(const char *arg);
140void focusprev(const char *arg);
141Client *getclient(Window w);
142unsigned long getcolor(const char *colstr);
143long getstate(Window w);
144Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
145void grabbuttons(Client *c, Bool focused);
146unsigned int idxoftag(const char *tag);
147void initfont(const char *fontstr);
148Bool isarrange(void (*func)());
149Bool isoccupied(unsigned int t);
150Bool isprotodel(Client *c);
151Bool isvisible(Client *c);
152void keypress(XEvent *e);
153void killclient(const char *arg);
154void leavenotify(XEvent *e);
155void manage(Window w, XWindowAttributes *wa);
156void mappingnotify(XEvent *e);
157void maprequest(XEvent *e);
158void movemouse(Client *c);
159Client *nexttiled(Client *c);
160void propertynotify(XEvent *e);
161void quit(const char *arg);
162void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
163void resizemouse(Client *c);
164void restack(void);
165void run(void);
166void scan(void);
167void setclientstate(Client *c, long state);
168void setlayout(const char *arg);
169void setmwfact(const char *arg);
170void setup(void);
171void spawn(const char *arg);
172void tag(const char *arg);
173unsigned int textnw(const char *text, unsigned int len);
174unsigned int textw(const char *text);
175void tile(void);
176void togglebar(const char *arg);
177void togglefloating(const char *arg);
178void togglemax(const char *arg);
179void toggletag(const char *arg);
180void toggleview(const char *arg);
181void unban(Client *c);
182void unmanage(Client *c);
183void unmapnotify(XEvent *e);
184void updatebarpos(void);
185void updatesizehints(Client *c);
186void updatetitle(Client *c);
187void view(const char *arg);
188void viewprevtag(const char *arg); /* views previous selected tags */
189int xerror(Display *dpy, XErrorEvent *ee);
190int xerrordummy(Display *dsply, XErrorEvent *ee);
191int xerrorstart(Display *dsply, XErrorEvent *ee);
192void zoom(const char *arg);
193
194/* variables */
195char stext[256];
196double mwfact;
197int screen, sx, sy, sw, sh, wax, way, waw, wah;
198int (*xerrorxlib)(Display *, XErrorEvent *);
199unsigned int bh, bpos;
200unsigned int blw = 0;
201unsigned int ltidx = 0; /* default */
202unsigned int nlayouts = 0;
203unsigned int nrules = 0;
204unsigned int numlockmask = 0;
205void (*handler[LASTEvent]) (XEvent *) = {
206 [ButtonPress] = buttonpress,
207 [ConfigureRequest] = configurerequest,
208 [ConfigureNotify] = configurenotify,
209 [DestroyNotify] = destroynotify,
210 [EnterNotify] = enternotify,
211 [LeaveNotify] = leavenotify,
212 [Expose] = expose,
213 [KeyPress] = keypress,
214 [MappingNotify] = mappingnotify,
215 [MapRequest] = maprequest,
216 [PropertyNotify] = propertynotify,
217 [UnmapNotify] = unmapnotify
218};
219Atom wmatom[WMLast], netatom[NetLast];
220Bool otherwm, readin;
221Bool running = True;
222Bool selscreen = True;
223Client *clients = NULL;
224Client *sel = NULL;
225Client *stack = NULL;
226Cursor cursor[CurLast];
227Display *dpy;
228DC dc = {0};
229Window barwin, root;
230Regs *regs = NULL;
231
232/* configuration, allows nested code to access above variables */
233#include "config.h"
234
235/* statically define the number of tags. */
236unsigned int ntags = sizeof tags / sizeof tags[0];
237Bool seltags[sizeof tags / sizeof tags[0]] = {[0] = True};
238Bool prevtags[sizeof tags / sizeof tags[0]] = {[0] = True};
239
240/* function implementations */
241void
242applyrules(Client *c) {
243 static char buf[512];
244 unsigned int i, j;
245 regmatch_t tmp;
246 Bool matched = False;
247 XClassHint ch = { 0 };
248
249 /* rule matching */
250 XGetClassHint(dpy, c->win, &ch);
251 snprintf(buf, sizeof buf, "%s:%s:%s",
252 ch.res_class ? ch.res_class : "",
253 ch.res_name ? ch.res_name : "", c->name);
254 for(i = 0; i < nrules; i++)
255 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
256 c->isfloating = rules[i].isfloating;
257 for(j = 0; regs[i].tagregex && j < ntags; j++) {
258 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
259 matched = True;
260 c->tags[j] = True;
261 }
262 }
263 }
264 if(ch.res_class)
265 XFree(ch.res_class);
266 if(ch.res_name)
267 XFree(ch.res_name);
268 if(!matched)
269 memcpy(c->tags, seltags, sizeof seltags);
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 Client *c, *t = NULL;
1006 Window trans;
1007 Status rettrans;
1008 XWindowChanges wc;
1009
1010 c = emallocz(sizeof(Client));
1011 c->tags = emallocz(sizeof seltags);
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 memcpy(c->tags, t->tags, sizeof seltags);
1047 applyrules(c);
1048 if(!c->isfloating)
1049 c->isfloating = (rettrans == Success) || c->isfixed;
1050 attach(c);
1051 attachstack(c);
1052 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1053 ban(c);
1054 XMapWindow(dpy, c->win);
1055 setclientstate(c, NormalState);
1056 arrange();
1057}
1058
1059void
1060mappingnotify(XEvent *e) {
1061 XMappingEvent *ev = &e->xmapping;
1062
1063 XRefreshKeyboardMapping(ev);
1064 if(ev->request == MappingKeyboard)
1065 keypress(NULL);
1066}
1067
1068void
1069maprequest(XEvent *e) {
1070 static XWindowAttributes wa;
1071 XMapRequestEvent *ev = &e->xmaprequest;
1072
1073 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1074 return;
1075 if(wa.override_redirect)
1076 return;
1077 if(!getclient(ev->window))
1078 manage(ev->window, &wa);
1079}
1080
1081void
1082movemouse(Client *c) {
1083 int x1, y1, ocx, ocy, di, nx, ny;
1084 unsigned int dui;
1085 Window dummy;
1086 XEvent ev;
1087
1088 ocx = nx = c->x;
1089 ocy = ny = c->y;
1090 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1091 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1092 return;
1093 c->ismax = False;
1094 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1095 for(;;) {
1096 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1097 switch (ev.type) {
1098 case ButtonRelease:
1099 XUngrabPointer(dpy, CurrentTime);
1100 return;
1101 case ConfigureRequest:
1102 case Expose:
1103 case MapRequest:
1104 handler[ev.type](&ev);
1105 break;
1106 case MotionNotify:
1107 XSync(dpy, False);
1108 nx = ocx + (ev.xmotion.x - x1);
1109 ny = ocy + (ev.xmotion.y - y1);
1110 if(abs(wax + nx) < SNAP)
1111 nx = wax;
1112 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1113 nx = wax + waw - c->w - 2 * c->border;
1114 if(abs(way - ny) < SNAP)
1115 ny = way;
1116 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1117 ny = way + wah - c->h - 2 * c->border;
1118 resize(c, nx, ny, c->w, c->h, False);
1119 break;
1120 }
1121 }
1122}
1123
1124Client *
1125nexttiled(Client *c) {
1126 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1127 return c;
1128}
1129
1130void
1131propertynotify(XEvent *e) {
1132 Client *c;
1133 Window trans;
1134 XPropertyEvent *ev = &e->xproperty;
1135
1136 if(ev->state == PropertyDelete)
1137 return; /* ignore */
1138 if((c = getclient(ev->window))) {
1139 switch (ev->atom) {
1140 default: break;
1141 case XA_WM_TRANSIENT_FOR:
1142 XGetTransientForHint(dpy, c->win, &trans);
1143 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1144 arrange();
1145 break;
1146 case XA_WM_NORMAL_HINTS:
1147 updatesizehints(c);
1148 break;
1149 }
1150 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1151 updatetitle(c);
1152 if(c == sel)
1153 drawbar();
1154 }
1155 }
1156}
1157
1158void
1159quit(const char *arg) {
1160 readin = running = False;
1161}
1162
1163void
1164resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1165 XWindowChanges wc;
1166
1167 if(sizehints) {
1168 /* set minimum possible */
1169 if (w < 1)
1170 w = 1;
1171 if (h < 1)
1172 h = 1;
1173
1174 /* temporarily remove base dimensions */
1175 w -= c->basew;
1176 h -= c->baseh;
1177
1178 /* adjust for aspect limits */
1179 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1180 if (w * c->maxay > h * c->maxax)
1181 w = h * c->maxax / c->maxay;
1182 else if (w * c->minay < h * c->minax)
1183 h = w * c->minay / c->minax;
1184 }
1185
1186 /* adjust for increment value */
1187 if(c->incw)
1188 w -= w % c->incw;
1189 if(c->inch)
1190 h -= h % c->inch;
1191
1192 /* restore base dimensions */
1193 w += c->basew;
1194 h += c->baseh;
1195
1196 if(c->minw > 0 && w < c->minw)
1197 w = c->minw;
1198 if(c->minh > 0 && h < c->minh)
1199 h = c->minh;
1200 if(c->maxw > 0 && w > c->maxw)
1201 w = c->maxw;
1202 if(c->maxh > 0 && h > c->maxh)
1203 h = c->maxh;
1204 }
1205 if(w <= 0 || h <= 0)
1206 return;
1207 /* offscreen appearance fixes */
1208 if(x > sw)
1209 x = sw - w - 2 * c->border;
1210 if(y > sh)
1211 y = sh - h - 2 * c->border;
1212 if(x + w + 2 * c->border < sx)
1213 x = sx;
1214 if(y + h + 2 * c->border < sy)
1215 y = sy;
1216 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1217 c->x = wc.x = x;
1218 c->y = wc.y = y;
1219 c->w = wc.width = w;
1220 c->h = wc.height = h;
1221 wc.border_width = c->border;
1222 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1223 configure(c);
1224 XSync(dpy, False);
1225 }
1226}
1227
1228void
1229resizemouse(Client *c) {
1230 int ocx, ocy;
1231 int nw, nh;
1232 XEvent ev;
1233
1234 ocx = c->x;
1235 ocy = c->y;
1236 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1237 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1238 return;
1239 c->ismax = False;
1240 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1241 for(;;) {
1242 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1243 switch(ev.type) {
1244 case ButtonRelease:
1245 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1246 c->w + c->border - 1, c->h + c->border - 1);
1247 XUngrabPointer(dpy, CurrentTime);
1248 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1249 return;
1250 case ConfigureRequest:
1251 case Expose:
1252 case MapRequest:
1253 handler[ev.type](&ev);
1254 break;
1255 case MotionNotify:
1256 XSync(dpy, False);
1257 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1258 nw = 1;
1259 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1260 nh = 1;
1261 resize(c, c->x, c->y, nw, nh, True);
1262 break;
1263 }
1264 }
1265}
1266
1267void
1268restack(void) {
1269 Client *c;
1270 XEvent ev;
1271 XWindowChanges wc;
1272
1273 drawbar();
1274 if(!sel)
1275 return;
1276 if(sel->isfloating || isarrange(floating))
1277 XRaiseWindow(dpy, sel->win);
1278 if(!isarrange(floating)) {
1279 wc.stack_mode = Below;
1280 wc.sibling = barwin;
1281 if(!sel->isfloating) {
1282 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1283 wc.sibling = sel->win;
1284 }
1285 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1286 if(c == sel)
1287 continue;
1288 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1289 wc.sibling = c->win;
1290 }
1291 }
1292 XSync(dpy, False);
1293 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1294}
1295
1296void
1297run(void) {
1298 char *p;
1299 int r, xfd;
1300 fd_set rd;
1301 XEvent ev;
1302
1303 /* main event loop, also reads status text from stdin */
1304 XSync(dpy, False);
1305 xfd = ConnectionNumber(dpy);
1306 readin = True;
1307 while(running) {
1308 FD_ZERO(&rd);
1309 if(readin)
1310 FD_SET(STDIN_FILENO, &rd);
1311 FD_SET(xfd, &rd);
1312 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1313 if(errno == EINTR)
1314 continue;
1315 eprint("select failed\n");
1316 }
1317 if(FD_ISSET(STDIN_FILENO, &rd)) {
1318 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1319 case -1:
1320 strncpy(stext, strerror(errno), sizeof stext - 1);
1321 stext[sizeof stext - 1] = '\0';
1322 readin = False;
1323 break;
1324 case 0:
1325 strncpy(stext, "EOF", 4);
1326 readin = False;
1327 break;
1328 default:
1329 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1330 for(; p >= stext && *p != '\n'; --p);
1331 if(p > stext)
1332 strncpy(stext, p + 1, sizeof stext);
1333 }
1334 drawbar();
1335 }
1336 while(XPending(dpy)) {
1337 XNextEvent(dpy, &ev);
1338 if(handler[ev.type])
1339 (handler[ev.type])(&ev); /* call handler */
1340 }
1341 }
1342}
1343
1344void
1345scan(void) {
1346 unsigned int i, num;
1347 Window *wins, d1, d2;
1348 XWindowAttributes wa;
1349
1350 wins = NULL;
1351 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1352 for(i = 0; i < num; i++) {
1353 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1354 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1355 continue;
1356 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1357 manage(wins[i], &wa);
1358 }
1359 for(i = 0; i < num; i++) { /* now the transients */
1360 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1361 continue;
1362 if(XGetTransientForHint(dpy, wins[i], &d1)
1363 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1364 manage(wins[i], &wa);
1365 }
1366 }
1367 if(wins)
1368 XFree(wins);
1369}
1370
1371void
1372setclientstate(Client *c, long state) {
1373 long data[] = {state, None};
1374
1375 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1376 PropModeReplace, (unsigned char *)data, 2);
1377}
1378
1379void
1380setlayout(const char *arg) {
1381 unsigned int i;
1382
1383 if(!arg) {
1384 if(++ltidx == nlayouts)
1385 ltidx = 0;;
1386 }
1387 else {
1388 for(i = 0; i < nlayouts; i++)
1389 if(!strcmp(arg, layouts[i].symbol))
1390 break;
1391 if(i == nlayouts)
1392 return;
1393 ltidx = i;
1394 }
1395 if(sel)
1396 arrange();
1397 else
1398 drawbar();
1399}
1400
1401void
1402setmwfact(const char *arg) {
1403 double delta;
1404
1405 if(!ISTILE)
1406 return;
1407 /* arg handling, manipulate mwfact */
1408 if(arg == NULL)
1409 mwfact = MWFACT;
1410 else if(1 == sscanf(arg, "%lf", &delta)) {
1411 if(arg[0] == '+' || arg[0] == '-')
1412 mwfact += delta;
1413 else
1414 mwfact = delta;
1415 if(mwfact < 0.1)
1416 mwfact = 0.1;
1417 else if(mwfact > 0.9)
1418 mwfact = 0.9;
1419 }
1420 arrange();
1421}
1422
1423void
1424setup(void) {
1425 int d;
1426 unsigned int i, j, mask;
1427 Window w;
1428 XModifierKeymap *modmap;
1429 XSetWindowAttributes wa;
1430
1431 /* init atoms */
1432 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1433 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1434 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1435 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1436 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1437 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1438 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1439 PropModeReplace, (unsigned char *) netatom, NetLast);
1440
1441 /* init cursors */
1442 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1443 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1444 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1445
1446 /* init geometry */
1447 sx = sy = 0;
1448 sw = DisplayWidth(dpy, screen);
1449 sh = DisplayHeight(dpy, screen);
1450
1451 /* init modifier map */
1452 modmap = XGetModifierMapping(dpy);
1453 for(i = 0; i < 8; i++)
1454 for(j = 0; j < modmap->max_keypermod; j++) {
1455 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1456 == XKeysymToKeycode(dpy, XK_Num_Lock))
1457 numlockmask = (1 << i);
1458 }
1459 XFreeModifiermap(modmap);
1460
1461 /* select for events */
1462 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1463 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1464 wa.cursor = cursor[CurNormal];
1465 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1466 XSelectInput(dpy, root, wa.event_mask);
1467
1468 /* grab keys */
1469 keypress(NULL);
1470
1471 /* init tags */
1472 compileregs();
1473
1474 /* init appearance */
1475 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1476 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1477 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1478 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1479 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1480 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1481 initfont(FONT);
1482 dc.h = bh = dc.font.height + 2;
1483
1484 /* init layouts */
1485 mwfact = MWFACT;
1486 nlayouts = sizeof layouts / sizeof layouts[0];
1487 for(blw = i = 0; i < nlayouts; i++) {
1488 j = textw(layouts[i].symbol);
1489 if(j > blw)
1490 blw = j;
1491 }
1492
1493 /* init bar */
1494 bpos = BARPOS;
1495 wa.override_redirect = 1;
1496 wa.background_pixmap = ParentRelative;
1497 wa.event_mask = ButtonPressMask | ExposureMask;
1498 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1499 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1500 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1501 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1502 updatebarpos();
1503 XMapRaised(dpy, barwin);
1504 strcpy(stext, "dwm-"VERSION);
1505 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1506 dc.gc = XCreateGC(dpy, root, 0, 0);
1507 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1508 if(!dc.font.set)
1509 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1510
1511 /* multihead support */
1512 selscreen = XQueryPointer(dpy, root, &w, &w, &d, &d, &d, &d, &mask);
1513}
1514
1515void
1516spawn(const char *arg) {
1517 static char *shell = NULL;
1518
1519 if(!shell && !(shell = getenv("SHELL")))
1520 shell = "/bin/sh";
1521 if(!arg)
1522 return;
1523 /* The double-fork construct avoids zombie processes and keeps the code
1524 * clean from stupid signal handlers. */
1525 if(fork() == 0) {
1526 if(fork() == 0) {
1527 if(dpy)
1528 close(ConnectionNumber(dpy));
1529 setsid();
1530 execl(shell, shell, "-c", arg, (char *)NULL);
1531 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1532 perror(" failed");
1533 }
1534 exit(0);
1535 }
1536 wait(0);
1537}
1538
1539void
1540tag(const char *arg) {
1541 unsigned int i;
1542
1543 if(!sel)
1544 return;
1545 for(i = 0; i < ntags; i++)
1546 sel->tags[i] = arg == NULL;
1547 i = idxoftag(arg);
1548 if(i >= 0 && i < ntags)
1549 sel->tags[i] = True;
1550 arrange();
1551}
1552
1553unsigned int
1554textnw(const char *text, unsigned int len) {
1555 XRectangle r;
1556
1557 if(dc.font.set) {
1558 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1559 return r.width;
1560 }
1561 return XTextWidth(dc.font.xfont, text, len);
1562}
1563
1564unsigned int
1565textw(const char *text) {
1566 return textnw(text, strlen(text)) + dc.font.height;
1567}
1568
1569void
1570tile(void) {
1571 unsigned int i, n, nx, ny, nw, nh, mw, th;
1572 Client *c, *mc;
1573
1574 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1575 n++;
1576
1577 /* window geoms */
1578 mw = (n == 1) ? waw : mwfact * waw;
1579 th = (n > 1) ? wah / (n - 1) : 0;
1580 if(n > 1 && th < bh)
1581 th = wah;
1582
1583 nx = wax;
1584 ny = way;
1585 nw = 0; /* gcc stupidity requires this */
1586 for(i = 0, c = mc = 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 += mc->w + 2 * mc->border;
1596 nw = waw - nx - 2 * c->border;
1597 }
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 = c->y + c->h + 2 * c->border;
1606 }
1607}
1608
1609void
1610togglebar(const char *arg) {
1611 if(bpos == BarOff)
1612 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1613 else
1614 bpos = BarOff;
1615 updatebarpos();
1616 arrange();
1617}
1618
1619void
1620togglefloating(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
1629void
1630togglemax(const char *arg) {
1631 XEvent ev;
1632
1633 if(!sel || sel->isfixed)
1634 return;
1635 if((sel->ismax = !sel->ismax)) {
1636 if(isarrange(floating) || sel->isfloating)
1637 sel->wasfloating = True;
1638 else {
1639 togglefloating(NULL);
1640 sel->wasfloating = False;
1641 }
1642 sel->rx = sel->x;
1643 sel->ry = sel->y;
1644 sel->rw = sel->w;
1645 sel->rh = sel->h;
1646 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1647 }
1648 else {
1649 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1650 if(!sel->wasfloating)
1651 togglefloating(NULL);
1652 }
1653 drawbar();
1654 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1655}
1656
1657void
1658toggletag(const char *arg) {
1659 unsigned int i, j;
1660
1661 if(!sel)
1662 return;
1663 i = idxoftag(arg);
1664 sel->tags[i] = !sel->tags[i];
1665 for(j = 0; j < ntags && !sel->tags[j]; j++);
1666 if(j == ntags)
1667 sel->tags[i] = True;
1668 arrange();
1669}
1670
1671void
1672toggleview(const char *arg) {
1673 unsigned int i, j;
1674
1675 i = idxoftag(arg);
1676 seltags[i] = !seltags[i];
1677 for(j = 0; j < ntags && !seltags[j]; j++);
1678 if(j == ntags)
1679 seltags[i] = True; /* at least one tag must be viewed */
1680 arrange();
1681}
1682
1683void
1684unban(Client *c) {
1685 if(!c->isbanned)
1686 return;
1687 XMoveWindow(dpy, c->win, c->x, c->y);
1688 c->isbanned = False;
1689}
1690
1691void
1692unmanage(Client *c) {
1693 XWindowChanges wc;
1694
1695 wc.border_width = c->oldborder;
1696 /* The server grab construct avoids race conditions. */
1697 XGrabServer(dpy);
1698 XSetErrorHandler(xerrordummy);
1699 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1700 detach(c);
1701 detachstack(c);
1702 if(sel == c)
1703 focus(NULL);
1704 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1705 setclientstate(c, WithdrawnState);
1706 free(c->tags);
1707 free(c);
1708 XSync(dpy, False);
1709 XSetErrorHandler(xerror);
1710 XUngrabServer(dpy);
1711 arrange();
1712}
1713
1714void
1715unmapnotify(XEvent *e) {
1716 Client *c;
1717 XUnmapEvent *ev = &e->xunmap;
1718
1719 if((c = getclient(ev->window)))
1720 unmanage(c);
1721}
1722
1723void
1724updatebarpos(void) {
1725 XEvent ev;
1726
1727 wax = sx;
1728 way = sy;
1729 wah = sh;
1730 waw = sw;
1731 switch(bpos) {
1732 default:
1733 wah -= bh;
1734 way += bh;
1735 XMoveWindow(dpy, barwin, sx, sy);
1736 break;
1737 case BarBot:
1738 wah -= bh;
1739 XMoveWindow(dpy, barwin, sx, sy + wah);
1740 break;
1741 case BarOff:
1742 XMoveWindow(dpy, barwin, sx, sy - bh);
1743 break;
1744 }
1745 XSync(dpy, False);
1746 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1747}
1748
1749void
1750updatesizehints(Client *c) {
1751 long msize;
1752 XSizeHints size;
1753
1754 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1755 size.flags = PSize;
1756 c->flags = size.flags;
1757 if(c->flags & PBaseSize) {
1758 c->basew = size.base_width;
1759 c->baseh = size.base_height;
1760 }
1761 else if(c->flags & PMinSize) {
1762 c->basew = size.min_width;
1763 c->baseh = size.min_height;
1764 }
1765 else
1766 c->basew = c->baseh = 0;
1767 if(c->flags & PResizeInc) {
1768 c->incw = size.width_inc;
1769 c->inch = size.height_inc;
1770 }
1771 else
1772 c->incw = c->inch = 0;
1773 if(c->flags & PMaxSize) {
1774 c->maxw = size.max_width;
1775 c->maxh = size.max_height;
1776 }
1777 else
1778 c->maxw = c->maxh = 0;
1779 if(c->flags & PMinSize) {
1780 c->minw = size.min_width;
1781 c->minh = size.min_height;
1782 }
1783 else if(c->flags & PBaseSize) {
1784 c->minw = size.base_width;
1785 c->minh = size.base_height;
1786 }
1787 else
1788 c->minw = c->minh = 0;
1789 if(c->flags & PAspect) {
1790 c->minax = size.min_aspect.x;
1791 c->maxax = size.max_aspect.x;
1792 c->minay = size.min_aspect.y;
1793 c->maxay = size.max_aspect.y;
1794 }
1795 else
1796 c->minax = c->maxax = c->minay = c->maxay = 0;
1797 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1798 && c->maxw == c->minw && c->maxh == c->minh);
1799}
1800
1801void
1802updatetitle(Client *c) {
1803 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1804 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1805}
1806
1807/* There's no way to check accesses to destroyed windows, thus those cases are
1808 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1809 * default error handler, which may call exit. */
1810int
1811xerror(Display *dpy, XErrorEvent *ee) {
1812 if(ee->error_code == BadWindow
1813 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1814 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1815 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1816 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1817 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1818 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1819 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1820 return 0;
1821 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1822 ee->request_code, ee->error_code);
1823 return xerrorxlib(dpy, ee); /* may call exit */
1824}
1825
1826int
1827xerrordummy(Display *dsply, XErrorEvent *ee) {
1828 return 0;
1829}
1830
1831/* Startup Error handler to check if another window manager
1832 * is already running. */
1833int
1834xerrorstart(Display *dsply, XErrorEvent *ee) {
1835 otherwm = True;
1836 return -1;
1837}
1838
1839void
1840view(const char *arg) {
1841 unsigned int i;
1842
1843 memcpy(prevtags, seltags, sizeof seltags);
1844 for(i = 0; i < ntags; i++)
1845 seltags[i] = arg == NULL;
1846 i = idxoftag(arg);
1847 if(i >= 0 && i < ntags)
1848 seltags[i] = True;
1849 arrange();
1850}
1851
1852void
1853viewprevtag(const char *arg) {
1854 static Bool tmptags[sizeof tags / sizeof tags[0]];
1855
1856 memcpy(tmptags, seltags, sizeof seltags);
1857 memcpy(seltags, prevtags, sizeof seltags);
1858 memcpy(prevtags, tmptags, sizeof seltags);
1859 arrange();
1860}
1861
1862void
1863zoom(const char *arg) {
1864 Client *c;
1865
1866 if(!sel || !ISTILE || sel->isfloating)
1867 return;
1868 if((c = sel) == nexttiled(clients))
1869 if(!(c = nexttiled(c->next)))
1870 return;
1871 detach(c);
1872 attach(c);
1873 focus(c);
1874 arrange();
1875}
1876
1877int
1878main(int argc, char *argv[]) {
1879 if(argc == 2 && !strcmp("-v", argv[1]))
1880 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1881 else if(argc != 1)
1882 eprint("usage: dwm [-v]\n");
1883
1884 setlocale(LC_CTYPE, "");
1885 if(!(dpy = XOpenDisplay(0)))
1886 eprint("dwm: cannot open display\n");
1887 screen = DefaultScreen(dpy);
1888 root = RootWindow(dpy, screen);
1889
1890 checkotherwm();
1891 setup();
1892 drawbar();
1893 scan();
1894 run();
1895 cleanup();
1896
1897 XCloseDisplay(dpy);
1898 return 0;
1899}