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.
21 *
22 * Keys and tagging rules are organized as arrays and defined in config.h.
23 *
24 * To understand everything else, start reading main().
25 */
26#include <errno.h>
27#include <locale.h>
28#include <stdarg.h>
29#include <stdio.h>
30#include <stdlib.h>
31#include <string.h>
32#include <unistd.h>
33#include <sys/select.h>
34#include <sys/types.h>
35#include <sys/wait.h>
36#include <regex.h>
37#include <X11/cursorfont.h>
38#include <X11/keysym.h>
39#include <X11/Xatom.h>
40#include <X11/Xlib.h>
41#include <X11/Xproto.h>
42#include <X11/Xutil.h>
43
44/* macros */
45#define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
46#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
47#define LENGTH(x) (sizeof x / sizeof x[0])
48#define MAXTAGLEN 16
49#define MOUSEMASK (BUTTONMASK | PointerMotionMask)
50
51
52/* enums */
53enum { BarTop, BarBot, BarOff }; /* bar position */
54enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
55enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
56enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
57enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
58
59/* typedefs */
60typedef struct Client Client;
61struct Client {
62 char name[256];
63 int x, y, w, h;
64 int rx, ry, rw, rh; /* revert geometry */
65 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
66 int minax, maxax, minay, maxay;
67 long flags;
68 unsigned int border, oldborder;
69 Bool isbanned, isfixed, ismax, isfloating, wasfloating;
70 Bool *tags;
71 Client *next;
72 Client *prev;
73 Client *snext;
74 Window win;
75};
76
77typedef struct {
78 int x, y, w, h;
79 unsigned long norm[ColLast];
80 unsigned long sel[ColLast];
81 Drawable drawable;
82 GC gc;
83 struct {
84 int ascent;
85 int descent;
86 int height;
87 XFontSet set;
88 XFontStruct *xfont;
89 } font;
90} DC; /* draw context */
91
92typedef struct {
93 unsigned long mod;
94 KeySym keysym;
95 void (*func)(const char *arg);
96 const char *arg;
97} Key;
98
99typedef struct {
100 const char *symbol;
101 void (*arrange)(void);
102} Layout;
103
104typedef struct {
105 const char *prop;
106 const char *tags;
107 Bool isfloating;
108} Rule;
109
110typedef struct {
111 regex_t *propregex;
112 regex_t *tagregex;
113} Regs;
114
115/* function declarations */
116void applyrules(Client *c);
117void arrange(void);
118void attach(Client *c);
119void attachstack(Client *c);
120void ban(Client *c);
121void buttonpress(XEvent *e);
122void checkotherwm(void);
123void cleanup(void);
124void compileregs(void);
125void configure(Client *c);
126void configurenotify(XEvent *e);
127void configurerequest(XEvent *e);
128void destroynotify(XEvent *e);
129void detach(Client *c);
130void detachstack(Client *c);
131void drawbar(void);
132void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
133void drawtext(const char *text, unsigned long col[ColLast]);
134void *emallocz(unsigned int size);
135void enternotify(XEvent *e);
136void eprint(const char *errstr, ...);
137void expose(XEvent *e);
138void floating(void); /* default floating layout */
139void focus(Client *c);
140void focusin(XEvent *e);
141void focusnext(const char *arg);
142void focusprev(const char *arg);
143Client *getclient(Window w);
144unsigned long getcolor(const char *colstr);
145long getstate(Window w);
146Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
147void grabbuttons(Client *c, Bool focused);
148void grabkeys(void);
149unsigned int idxoftag(const char *tag);
150void initfont(const char *fontstr);
151Bool isoccupied(unsigned int t);
152Bool isprotodel(Client *c);
153Bool isvisible(Client *c);
154void keypress(XEvent *e);
155void killclient(const char *arg);
156void leavenotify(XEvent *e);
157void manage(Window w, XWindowAttributes *wa);
158void mappingnotify(XEvent *e);
159void maprequest(XEvent *e);
160void movemouse(Client *c);
161Client *nexttiled(Client *c);
162void propertynotify(XEvent *e);
163void quit(const char *arg);
164void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
165void resizemouse(Client *c);
166void restack(void);
167void run(void);
168void scan(void);
169void setclientstate(Client *c, long state);
170void setlayout(const char *arg);
171void setmwfact(const char *arg);
172void setup(void);
173void spawn(const char *arg);
174void tag(const char *arg);
175unsigned int textnw(const char *text, unsigned int len);
176unsigned int textw(const char *text);
177void tile(void);
178void togglebar(const char *arg);
179void togglefloating(const char *arg);
180void togglemax(const char *arg);
181void toggletag(const char *arg);
182void toggleview(const char *arg);
183void unban(Client *c);
184void unmanage(Client *c);
185void unmapnotify(XEvent *e);
186void updatebarpos(void);
187void updatesizehints(Client *c);
188void updatetitle(Client *c);
189void view(const char *arg);
190void viewprevtag(const char *arg); /* views previous selected tags */
191int xerror(Display *dpy, XErrorEvent *ee);
192int xerrordummy(Display *dsply, XErrorEvent *ee);
193int xerrorstart(Display *dsply, XErrorEvent *ee);
194void zoom(const char *arg);
195
196/* variables */
197char stext[256];
198double mwfact;
199int screen, sx, sy, sw, sh, wax, way, waw, wah;
200int (*xerrorxlib)(Display *, XErrorEvent *);
201unsigned int bh, bpos;
202unsigned int blw = 0;
203unsigned int numlockmask = 0;
204void (*handler[LASTEvent]) (XEvent *) = {
205 [ButtonPress] = buttonpress,
206 [ConfigureRequest] = configurerequest,
207 [ConfigureNotify] = configurenotify,
208 [DestroyNotify] = destroynotify,
209 [EnterNotify] = enternotify,
210 [Expose] = expose,
211 [FocusIn] = focusin,
212 [KeyPress] = keypress,
213 [LeaveNotify] = leavenotify,
214 [MappingNotify] = mappingnotify,
215 [MapRequest] = maprequest,
216 [PropertyNotify] = propertynotify,
217 [UnmapNotify] = unmapnotify
218};
219Atom wmatom[WMLast], netatom[NetLast];
220Bool domwfact = True;
221Bool dozoom = True;
222Bool otherwm, readin;
223Bool running = True;
224Bool selscreen = True;
225Client *clients = NULL;
226Client *sel = NULL;
227Client *stack = NULL;
228Cursor cursor[CurLast];
229Display *dpy;
230DC dc = {0};
231Layout *layout = NULL;
232Window barwin, root;
233Regs *regs = NULL;
234
235/* configuration, allows nested code to access above variables */
236#include "config.h"
237
238Bool prevtags[LENGTH(tags)];
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 < LENGTH(rules); 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 < LENGTH(tags); 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 layout->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(ev->window == barwin) {
315 x = 0;
316 for(i = 0; i < LENGTH(tags); 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((layout->arrange == floating) || c->isfloating)
343 restack();
344 else
345 togglefloating(NULL);
346 movemouse(c);
347 }
348 else if(ev->button == Button2) {
349 if((floating != layout->arrange) && c->isfloating)
350 togglefloating(NULL);
351 else
352 zoom(NULL);
353 }
354 else if(ev->button == Button3 && !c->isfixed) {
355 if((floating == layout->arrange) || 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 regs = emallocz(LENGTH(rules) * sizeof(Regs));
410 for(i = 0; i < LENGTH(rules); i++) {
411 if(rules[i].prop) {
412 reg = emallocz(sizeof(regex_t));
413 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
414 free(reg);
415 else
416 regs[i].propregex = reg;
417 }
418 if(rules[i].tags) {
419 reg = emallocz(sizeof(regex_t));
420 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
421 free(reg);
422 else
423 regs[i].tagregex = reg;
424 }
425 }
426}
427
428void
429configure(Client *c) {
430 XConfigureEvent ce;
431
432 ce.type = ConfigureNotify;
433 ce.display = dpy;
434 ce.event = c->win;
435 ce.window = c->win;
436 ce.x = c->x;
437 ce.y = c->y;
438 ce.width = c->w;
439 ce.height = c->h;
440 ce.border_width = c->border;
441 ce.above = None;
442 ce.override_redirect = False;
443 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
444}
445
446void
447configurenotify(XEvent *e) {
448 XConfigureEvent *ev = &e->xconfigure;
449
450 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
451 sw = ev->width;
452 sh = ev->height;
453 XFreePixmap(dpy, dc.drawable);
454 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
455 XResizeWindow(dpy, barwin, sw, bh);
456 updatebarpos();
457 arrange();
458 }
459}
460
461void
462configurerequest(XEvent *e) {
463 Client *c;
464 XConfigureRequestEvent *ev = &e->xconfigurerequest;
465 XWindowChanges wc;
466
467 if((c = getclient(ev->window))) {
468 c->ismax = False;
469 if(ev->value_mask & CWBorderWidth)
470 c->border = ev->border_width;
471 if(c->isfixed || c->isfloating || (floating == layout->arrange)) {
472 if(ev->value_mask & CWX)
473 c->x = ev->x;
474 if(ev->value_mask & CWY)
475 c->y = ev->y;
476 if(ev->value_mask & CWWidth)
477 c->w = ev->width;
478 if(ev->value_mask & CWHeight)
479 c->h = ev->height;
480 if((c->x + c->w) > sw && c->isfloating)
481 c->x = sw / 2 - c->w / 2; /* center in x direction */
482 if((c->y + c->h) > sh && c->isfloating)
483 c->y = sh / 2 - c->h / 2; /* center in y direction */
484 if((ev->value_mask & (CWX | CWY))
485 && !(ev->value_mask & (CWWidth | CWHeight)))
486 configure(c);
487 if(isvisible(c))
488 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
489 }
490 else
491 configure(c);
492 }
493 else {
494 wc.x = ev->x;
495 wc.y = ev->y;
496 wc.width = ev->width;
497 wc.height = ev->height;
498 wc.border_width = ev->border_width;
499 wc.sibling = ev->above;
500 wc.stack_mode = ev->detail;
501 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
502 }
503 XSync(dpy, False);
504}
505
506void
507destroynotify(XEvent *e) {
508 Client *c;
509 XDestroyWindowEvent *ev = &e->xdestroywindow;
510
511 if((c = getclient(ev->window)))
512 unmanage(c);
513}
514
515void
516detach(Client *c) {
517 if(c->prev)
518 c->prev->next = c->next;
519 if(c->next)
520 c->next->prev = c->prev;
521 if(c == clients)
522 clients = c->next;
523 c->next = c->prev = NULL;
524}
525
526void
527detachstack(Client *c) {
528 Client **tc;
529
530 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
531 *tc = c->snext;
532}
533
534void
535drawbar(void) {
536 int i, x;
537
538 dc.x = dc.y = 0;
539 for(i = 0; i < LENGTH(tags); i++) {
540 dc.w = textw(tags[i]);
541 if(seltags[i]) {
542 drawtext(tags[i], dc.sel);
543 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
544 }
545 else {
546 drawtext(tags[i], dc.norm);
547 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
548 }
549 dc.x += dc.w;
550 }
551 dc.w = blw;
552 drawtext(layout->symbol, dc.norm);
553 x = dc.x + dc.w;
554 dc.w = textw(stext);
555 dc.x = sw - dc.w;
556 if(dc.x < x) {
557 dc.x = x;
558 dc.w = sw - x;
559 }
560 drawtext(stext, dc.norm);
561 if((dc.w = dc.x - x) > bh) {
562 dc.x = x;
563 if(sel) {
564 drawtext(sel->name, dc.sel);
565 drawsquare(sel->ismax, sel->isfloating, dc.sel);
566 }
567 else
568 drawtext(NULL, dc.norm);
569 }
570 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
571 XSync(dpy, False);
572}
573
574void
575drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
576 int x;
577 XGCValues gcv;
578 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
579
580 gcv.foreground = col[ColFG];
581 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
582 x = (dc.font.ascent + dc.font.descent + 2) / 4;
583 r.x = dc.x + 1;
584 r.y = dc.y + 1;
585 if(filled) {
586 r.width = r.height = x + 1;
587 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
588 }
589 else if(empty) {
590 r.width = r.height = x;
591 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
592 }
593}
594
595void
596drawtext(const char *text, unsigned long col[ColLast]) {
597 int x, y, w, h;
598 static char buf[256];
599 unsigned int len, olen;
600 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
601
602 XSetForeground(dpy, dc.gc, col[ColBG]);
603 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
604 if(!text)
605 return;
606 w = 0;
607 olen = len = strlen(text);
608 if(len >= sizeof buf)
609 len = sizeof buf - 1;
610 memcpy(buf, text, len);
611 buf[len] = 0;
612 h = dc.font.ascent + dc.font.descent;
613 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
614 x = dc.x + (h / 2);
615 /* shorten text if necessary */
616 while(len && (w = textnw(buf, len)) > dc.w - h)
617 buf[--len] = 0;
618 if(len < olen) {
619 if(len > 1)
620 buf[len - 1] = '.';
621 if(len > 2)
622 buf[len - 2] = '.';
623 if(len > 3)
624 buf[len - 3] = '.';
625 }
626 if(w > dc.w)
627 return; /* too long */
628 XSetForeground(dpy, dc.gc, col[ColFG]);
629 if(dc.font.set)
630 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
631 else
632 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
633}
634
635void *
636emallocz(unsigned int size) {
637 void *res = calloc(1, size);
638
639 if(!res)
640 eprint("fatal: could not malloc() %u bytes\n", size);
641 return res;
642}
643
644void
645enternotify(XEvent *e) {
646 Client *c;
647 XCrossingEvent *ev = &e->xcrossing;
648
649 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
650 return;
651 if((c = getclient(ev->window)))
652 focus(c);
653 else if(ev->window == root) {
654 selscreen = True;
655 focus(NULL);
656 }
657}
658
659void
660eprint(const char *errstr, ...) {
661 va_list ap;
662
663 va_start(ap, errstr);
664 vfprintf(stderr, errstr, ap);
665 va_end(ap);
666 exit(EXIT_FAILURE);
667}
668
669void
670expose(XEvent *e) {
671 XExposeEvent *ev = &e->xexpose;
672
673 if(ev->count == 0) {
674 if(ev->window == barwin)
675 drawbar();
676 }
677}
678
679void
680floating(void) { /* default floating layout */
681 Client *c;
682
683 domwfact = dozoom = False;
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
715focusin(XEvent *e) { /* there are some broken focus acquiring clients */
716 XFocusChangeEvent *ev = &e->xfocus;
717
718 if(sel && ev->window != sel->win)
719 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
720}
721
722void
723focusnext(const char *arg) {
724 Client *c;
725
726 if(!sel)
727 return;
728 for(c = sel->next; c && !isvisible(c); c = c->next);
729 if(!c)
730 for(c = clients; c && !isvisible(c); c = c->next);
731 if(c) {
732 focus(c);
733 restack();
734 }
735}
736
737void
738focusprev(const char *arg) {
739 Client *c;
740
741 if(!sel)
742 return;
743 for(c = sel->prev; c && !isvisible(c); c = c->prev);
744 if(!c) {
745 for(c = clients; c && c->next; c = c->next);
746 for(; c && !isvisible(c); c = c->prev);
747 }
748 if(c) {
749 focus(c);
750 restack();
751 }
752}
753
754Client *
755getclient(Window w) {
756 Client *c;
757
758 for(c = clients; c && c->win != w; c = c->next);
759 return c;
760}
761
762unsigned long
763getcolor(const char *colstr) {
764 Colormap cmap = DefaultColormap(dpy, screen);
765 XColor color;
766
767 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
768 eprint("error, cannot allocate color '%s'\n", colstr);
769 return color.pixel;
770}
771
772long
773getstate(Window w) {
774 int format, status;
775 long result = -1;
776 unsigned char *p = NULL;
777 unsigned long n, extra;
778 Atom real;
779
780 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
781 &real, &format, &n, &extra, (unsigned char **)&p);
782 if(status != Success)
783 return -1;
784 if(n != 0)
785 result = *p;
786 XFree(p);
787 return result;
788}
789
790Bool
791gettextprop(Window w, Atom atom, char *text, unsigned int size) {
792 char **list = NULL;
793 int n;
794 XTextProperty name;
795
796 if(!text || size == 0)
797 return False;
798 text[0] = '\0';
799 XGetTextProperty(dpy, w, &name, atom);
800 if(!name.nitems)
801 return False;
802 if(name.encoding == XA_STRING)
803 strncpy(text, (char *)name.value, size - 1);
804 else {
805 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
806 && n > 0 && *list) {
807 strncpy(text, *list, size - 1);
808 XFreeStringList(list);
809 }
810 }
811 text[size - 1] = '\0';
812 XFree(name.value);
813 return True;
814}
815
816void
817grabbuttons(Client *c, Bool focused) {
818 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
819
820 if(focused) {
821 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
822 GrabModeAsync, GrabModeSync, None, None);
823 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
824 GrabModeAsync, GrabModeSync, None, None);
825 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
826 GrabModeAsync, GrabModeSync, None, None);
827 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
828 GrabModeAsync, GrabModeSync, None, None);
829
830 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
831 GrabModeAsync, GrabModeSync, None, None);
832 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
833 GrabModeAsync, GrabModeSync, None, None);
834 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
835 GrabModeAsync, GrabModeSync, None, None);
836 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
837 GrabModeAsync, GrabModeSync, None, None);
838
839 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
840 GrabModeAsync, GrabModeSync, None, None);
841 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
842 GrabModeAsync, GrabModeSync, None, None);
843 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
844 GrabModeAsync, GrabModeSync, None, None);
845 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
846 GrabModeAsync, GrabModeSync, None, None);
847 }
848 else
849 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
850 GrabModeAsync, GrabModeSync, None, None);
851}
852
853void
854grabkeys(void) {
855 unsigned int i;
856 KeyCode code;
857
858 XUngrabKey(dpy, AnyKey, AnyModifier, root);
859 for(i = 0; i < LENGTH(keys); i++) {
860 code = XKeysymToKeycode(dpy, keys[i].keysym);
861 XGrabKey(dpy, code, keys[i].mod, root, True,
862 GrabModeAsync, GrabModeAsync);
863 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
864 GrabModeAsync, GrabModeAsync);
865 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
866 GrabModeAsync, GrabModeAsync);
867 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
868 GrabModeAsync, GrabModeAsync);
869 }
870}
871
872unsigned int
873idxoftag(const char *tag) {
874 unsigned int i;
875
876 for(i = 0; (i < LENGTH(tags)) && (tags[i] != tag); i++);
877 return (i < LENGTH(tags)) ? i : 0;
878}
879
880void
881initfont(const char *fontstr) {
882 char *def, **missing;
883 int i, n;
884
885 missing = NULL;
886 if(dc.font.set)
887 XFreeFontSet(dpy, dc.font.set);
888 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
889 if(missing) {
890 while(n--)
891 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
892 XFreeStringList(missing);
893 }
894 if(dc.font.set) {
895 XFontSetExtents *font_extents;
896 XFontStruct **xfonts;
897 char **font_names;
898 dc.font.ascent = dc.font.descent = 0;
899 font_extents = XExtentsOfFontSet(dc.font.set);
900 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
901 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
902 if(dc.font.ascent < (*xfonts)->ascent)
903 dc.font.ascent = (*xfonts)->ascent;
904 if(dc.font.descent < (*xfonts)->descent)
905 dc.font.descent = (*xfonts)->descent;
906 xfonts++;
907 }
908 }
909 else {
910 if(dc.font.xfont)
911 XFreeFont(dpy, dc.font.xfont);
912 dc.font.xfont = NULL;
913 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
914 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
915 eprint("error, cannot load font: '%s'\n", fontstr);
916 dc.font.ascent = dc.font.xfont->ascent;
917 dc.font.descent = dc.font.xfont->descent;
918 }
919 dc.font.height = dc.font.ascent + dc.font.descent;
920}
921
922Bool
923isoccupied(unsigned int t) {
924 Client *c;
925
926 for(c = clients; c; c = c->next)
927 if(c->tags[t])
928 return True;
929 return False;
930}
931
932Bool
933isprotodel(Client *c) {
934 int i, n;
935 Atom *protocols;
936 Bool ret = False;
937
938 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
939 for(i = 0; !ret && i < n; i++)
940 if(protocols[i] == wmatom[WMDelete])
941 ret = True;
942 XFree(protocols);
943 }
944 return ret;
945}
946
947Bool
948isvisible(Client *c) {
949 unsigned int i;
950
951 for(i = 0; i < LENGTH(tags); i++)
952 if(c->tags[i] && seltags[i])
953 return True;
954 return False;
955}
956
957void
958keypress(XEvent *e) {
959 unsigned int i;
960 KeySym keysym;
961 XKeyEvent *ev;
962
963 ev = &e->xkey;
964 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
965 for(i = 0; i < LENGTH(keys); 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, EnterWindowMask | FocusChangeMask | PropertyChangeMask | StructureNotifyMask);
1040 grabbuttons(c, False);
1041 updatetitle(c);
1042 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1043 for(t = clients; t && t->win != trans; t = t->next);
1044 if(t)
1045 memcpy(c->tags, t->tags, sizeof seltags);
1046 applyrules(c);
1047 if(!c->isfloating)
1048 c->isfloating = (rettrans == Success) || c->isfixed;
1049 attach(c);
1050 attachstack(c);
1051 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1052 ban(c);
1053 XMapWindow(dpy, c->win);
1054 setclientstate(c, NormalState);
1055 arrange();
1056}
1057
1058void
1059mappingnotify(XEvent *e) {
1060 XMappingEvent *ev = &e->xmapping;
1061
1062 XRefreshKeyboardMapping(ev);
1063 if(ev->request == MappingKeyboard)
1064 grabkeys();
1065}
1066
1067void
1068maprequest(XEvent *e) {
1069 static XWindowAttributes wa;
1070 XMapRequestEvent *ev = &e->xmaprequest;
1071
1072 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1073 return;
1074 if(wa.override_redirect)
1075 return;
1076 if(!getclient(ev->window))
1077 manage(ev->window, &wa);
1078}
1079
1080void
1081movemouse(Client *c) {
1082 int x1, y1, ocx, ocy, di, nx, ny;
1083 unsigned int dui;
1084 Window dummy;
1085 XEvent ev;
1086
1087 ocx = nx = c->x;
1088 ocy = ny = c->y;
1089 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1090 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1091 return;
1092 c->ismax = False;
1093 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1094 for(;;) {
1095 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1096 switch (ev.type) {
1097 case ButtonRelease:
1098 XUngrabPointer(dpy, CurrentTime);
1099 return;
1100 case ConfigureRequest:
1101 case Expose:
1102 case MapRequest:
1103 handler[ev.type](&ev);
1104 break;
1105 case MotionNotify:
1106 XSync(dpy, False);
1107 nx = ocx + (ev.xmotion.x - x1);
1108 ny = ocy + (ev.xmotion.y - y1);
1109 if(abs(wax + nx) < SNAP)
1110 nx = wax;
1111 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1112 nx = wax + waw - c->w - 2 * c->border;
1113 if(abs(way - ny) < SNAP)
1114 ny = way;
1115 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1116 ny = way + wah - c->h - 2 * c->border;
1117 resize(c, nx, ny, c->w, c->h, False);
1118 break;
1119 }
1120 }
1121}
1122
1123Client *
1124nexttiled(Client *c) {
1125 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1126 return c;
1127}
1128
1129void
1130propertynotify(XEvent *e) {
1131 Client *c;
1132 Window trans;
1133 XPropertyEvent *ev = &e->xproperty;
1134
1135 if(ev->state == PropertyDelete)
1136 return; /* ignore */
1137 if((c = getclient(ev->window))) {
1138 switch (ev->atom) {
1139 default: break;
1140 case XA_WM_TRANSIENT_FOR:
1141 XGetTransientForHint(dpy, c->win, &trans);
1142 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1143 arrange();
1144 break;
1145 case XA_WM_NORMAL_HINTS:
1146 updatesizehints(c);
1147 break;
1148 }
1149 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1150 updatetitle(c);
1151 if(c == sel)
1152 drawbar();
1153 }
1154 }
1155}
1156
1157void
1158quit(const char *arg) {
1159 readin = running = False;
1160}
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 || (layout->arrange == floating))
1277 XRaiseWindow(dpy, sel->win);
1278 if(layout->arrange != 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 char buf[sizeof stext];
1300 fd_set rd;
1301 int r, xfd;
1302 unsigned int len, offset;
1303 XEvent ev;
1304
1305 /* main event loop, also reads status text from stdin */
1306 XSync(dpy, False);
1307 xfd = ConnectionNumber(dpy);
1308 readin = True;
1309 offset = 0;
1310 len = sizeof stext - 1;
1311 buf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1312 while(running) {
1313 FD_ZERO(&rd);
1314 if(readin)
1315 FD_SET(STDIN_FILENO, &rd);
1316 FD_SET(xfd, &rd);
1317 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1318 if(errno == EINTR)
1319 continue;
1320 eprint("select failed\n");
1321 }
1322 if(FD_ISSET(STDIN_FILENO, &rd)) {
1323 switch((r = read(STDIN_FILENO, buf + offset, len - offset))) {
1324 case -1:
1325 strncpy(stext, strerror(errno), len);
1326 readin = False;
1327 break;
1328 case 0:
1329 strncpy(stext, "EOF", 4);
1330 readin = False;
1331 break;
1332 default:
1333 for(p = buf + offset; r > 0; p++, r--, offset++)
1334 if(*p == '\n' || *p == '\0') {
1335 *p = '\0';
1336 strncpy(stext, buf, len);
1337 p += r - 1; /* p is buf + offset + r - 1 */
1338 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1339 offset = r;
1340 if(r)
1341 memmove(buf, p - r + 1, r);
1342 break;
1343 }
1344 break;
1345 }
1346 drawbar();
1347 }
1348 while(XPending(dpy)) {
1349 XNextEvent(dpy, &ev);
1350 if(handler[ev.type])
1351 (handler[ev.type])(&ev); /* call handler */
1352 }
1353 }
1354}
1355
1356void
1357scan(void) {
1358 unsigned int i, num;
1359 Window *wins, d1, d2;
1360 XWindowAttributes wa;
1361
1362 wins = NULL;
1363 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1364 for(i = 0; i < num; i++) {
1365 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1366 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1367 continue;
1368 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1369 manage(wins[i], &wa);
1370 }
1371 for(i = 0; i < num; i++) { /* now the transients */
1372 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1373 continue;
1374 if(XGetTransientForHint(dpy, wins[i], &d1)
1375 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1376 manage(wins[i], &wa);
1377 }
1378 }
1379 if(wins)
1380 XFree(wins);
1381}
1382
1383void
1384setclientstate(Client *c, long state) {
1385 long data[] = {state, None};
1386
1387 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1388 PropModeReplace, (unsigned char *)data, 2);
1389}
1390
1391void
1392setlayout(const char *arg) {
1393 unsigned int i;
1394
1395 if(!arg) {
1396 if(++layout == &layouts[LENGTH(layouts)])
1397 layout = &layouts[0];
1398 }
1399 else {
1400 for(i = 0; i < LENGTH(layouts); i++)
1401 if(!strcmp(arg, layouts[i].symbol))
1402 break;
1403 if(i == LENGTH(layouts))
1404 return;
1405 layout = &layouts[i];
1406 }
1407 if(sel)
1408 arrange();
1409 else
1410 drawbar();
1411}
1412
1413void
1414setmwfact(const char *arg) {
1415 double delta;
1416
1417 if(!domwfact)
1418 return;
1419 /* arg handling, manipulate mwfact */
1420 if(arg == NULL)
1421 mwfact = MWFACT;
1422 else if(sscanf(arg, "%lf", &delta) == 1) {
1423 if(arg[0] == '+' || arg[0] == '-')
1424 mwfact += delta;
1425 else
1426 mwfact = delta;
1427 if(mwfact < 0.1)
1428 mwfact = 0.1;
1429 else if(mwfact > 0.9)
1430 mwfact = 0.9;
1431 }
1432 arrange();
1433}
1434
1435void
1436setup(void) {
1437 int d;
1438 unsigned int i, j, mask;
1439 Window w;
1440 XModifierKeymap *modmap;
1441 XSetWindowAttributes wa;
1442
1443 /* init atoms */
1444 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1445 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1446 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1447 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1448 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1449 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1450 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1451 PropModeReplace, (unsigned char *) netatom, NetLast);
1452
1453 /* init cursors */
1454 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1455 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1456 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1457
1458 /* init geometry */
1459 sx = sy = 0;
1460 sw = DisplayWidth(dpy, screen);
1461 sh = DisplayHeight(dpy, screen);
1462
1463 /* init modifier map */
1464 modmap = XGetModifierMapping(dpy);
1465 for(i = 0; i < 8; i++)
1466 for(j = 0; j < modmap->max_keypermod; j++) {
1467 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1468 == XKeysymToKeycode(dpy, XK_Num_Lock))
1469 numlockmask = (1 << i);
1470 }
1471 XFreeModifiermap(modmap);
1472
1473 /* select for events */
1474 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1475 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1476 wa.cursor = cursor[CurNormal];
1477 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1478 XSelectInput(dpy, root, wa.event_mask);
1479
1480 /* grab keys */
1481 grabkeys();
1482
1483 /* init tags */
1484 memcpy(prevtags, seltags, sizeof seltags);
1485 compileregs();
1486
1487 /* init appearance */
1488 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1489 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1490 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1491 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1492 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1493 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1494 initfont(FONT);
1495 dc.h = bh = dc.font.height + 2;
1496
1497 /* init layouts */
1498 mwfact = MWFACT;
1499 layout = &layouts[0];
1500 for(blw = i = 0; i < LENGTH(layouts); i++) {
1501 j = textw(layouts[i].symbol);
1502 if(j > blw)
1503 blw = j;
1504 }
1505
1506 /* init bar */
1507 bpos = BARPOS;
1508 wa.override_redirect = 1;
1509 wa.background_pixmap = ParentRelative;
1510 wa.event_mask = ButtonPressMask | ExposureMask;
1511 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1512 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1513 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1514 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1515 updatebarpos();
1516 XMapRaised(dpy, barwin);
1517 strcpy(stext, "dwm-"VERSION);
1518 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1519 dc.gc = XCreateGC(dpy, root, 0, 0);
1520 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1521 if(!dc.font.set)
1522 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1523
1524 /* multihead support */
1525 selscreen = XQueryPointer(dpy, root, &w, &w, &d, &d, &d, &d, &mask);
1526
1527}
1528
1529void
1530spawn(const char *arg) {
1531 static char *shell = NULL;
1532
1533 if(!shell && !(shell = getenv("SHELL")))
1534 shell = "/bin/sh";
1535 if(!arg)
1536 return;
1537 /* The double-fork construct avoids zombie processes and keeps the code
1538 * clean from stupid signal handlers. */
1539 if(fork() == 0) {
1540 if(fork() == 0) {
1541 if(dpy)
1542 close(ConnectionNumber(dpy));
1543 setsid();
1544 execl(shell, shell, "-c", arg, (char *)NULL);
1545 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1546 perror(" failed");
1547 }
1548 exit(0);
1549 }
1550 wait(0);
1551}
1552
1553void
1554tag(const char *arg) {
1555 unsigned int i;
1556
1557 if(!sel)
1558 return;
1559 for(i = 0; i < LENGTH(tags); i++)
1560 sel->tags[i] = (NULL == arg);
1561 sel->tags[idxoftag(arg)] = True;
1562 arrange();
1563}
1564
1565unsigned int
1566textnw(const char *text, unsigned int len) {
1567 XRectangle r;
1568
1569 if(dc.font.set) {
1570 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1571 return r.width;
1572 }
1573 return XTextWidth(dc.font.xfont, text, len);
1574}
1575
1576unsigned int
1577textw(const char *text) {
1578 return textnw(text, strlen(text)) + dc.font.height;
1579}
1580
1581void
1582tile(void) {
1583 unsigned int i, n, nx, ny, nw, nh, mw, th;
1584 Client *c, *mc;
1585
1586 domwfact = dozoom = True;
1587 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1588 n++;
1589
1590 /* window geoms */
1591 mw = (n == 1) ? waw : mwfact * waw;
1592 th = (n > 1) ? wah / (n - 1) : 0;
1593 if(n > 1 && th < bh)
1594 th = wah;
1595
1596 nx = wax;
1597 ny = way;
1598 nw = 0; /* gcc stupidity requires this */
1599 for(i = 0, c = mc = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1600 c->ismax = False;
1601 if(i == 0) { /* master */
1602 nw = mw - 2 * c->border;
1603 nh = wah - 2 * c->border;
1604 }
1605 else { /* tile window */
1606 if(i == 1) {
1607 ny = way;
1608 nx += mc->w + 2 * mc->border;
1609 nw = waw - nx - 2 * c->border;
1610 }
1611 if(i + 1 == n) /* remainder */
1612 nh = (way + wah) - ny - 2 * c->border;
1613 else
1614 nh = th - 2 * c->border;
1615 }
1616 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1617 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1618 /* client doesn't accept size constraints */
1619 resize(c, nx, ny, nw, nh, False);
1620 if(n > 1 && th != wah)
1621 ny = c->y + c->h + 2 * c->border;
1622 }
1623}
1624
1625void
1626togglebar(const char *arg) {
1627 if(bpos == BarOff)
1628 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1629 else
1630 bpos = BarOff;
1631 updatebarpos();
1632 arrange();
1633}
1634
1635void
1636togglefloating(const char *arg) {
1637 if(!sel)
1638 return;
1639 sel->isfloating = !sel->isfloating;
1640 if(sel->isfloating)
1641 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1642 arrange();
1643}
1644
1645void
1646togglemax(const char *arg) {
1647 XEvent ev;
1648
1649 if(!sel || sel->isfixed)
1650 return;
1651 if((sel->ismax = !sel->ismax)) {
1652 if((layout->arrange == floating) || sel->isfloating)
1653 sel->wasfloating = True;
1654 else {
1655 togglefloating(NULL);
1656 sel->wasfloating = False;
1657 }
1658 sel->rx = sel->x;
1659 sel->ry = sel->y;
1660 sel->rw = sel->w;
1661 sel->rh = sel->h;
1662 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1663 }
1664 else {
1665 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1666 if(!sel->wasfloating)
1667 togglefloating(NULL);
1668 }
1669 drawbar();
1670 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1671}
1672
1673void
1674toggletag(const char *arg) {
1675 unsigned int i, j;
1676
1677 if(!sel)
1678 return;
1679 i = idxoftag(arg);
1680 sel->tags[i] = !sel->tags[i];
1681 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1682 if(j == LENGTH(tags))
1683 sel->tags[i] = True; /* at least one tag must be enabled */
1684 arrange();
1685}
1686
1687void
1688toggleview(const char *arg) {
1689 unsigned int i, j;
1690
1691 i = idxoftag(arg);
1692 seltags[i] = !seltags[i];
1693 for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1694 if(j == LENGTH(tags))
1695 seltags[i] = True; /* at least one tag must be viewed */
1696 arrange();
1697}
1698
1699void
1700unban(Client *c) {
1701 if(!c->isbanned)
1702 return;
1703 XMoveWindow(dpy, c->win, c->x, c->y);
1704 c->isbanned = False;
1705}
1706
1707void
1708unmanage(Client *c) {
1709 XWindowChanges wc;
1710
1711 wc.border_width = c->oldborder;
1712 /* The server grab construct avoids race conditions. */
1713 XGrabServer(dpy);
1714 XSetErrorHandler(xerrordummy);
1715 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1716 detach(c);
1717 detachstack(c);
1718 if(sel == c)
1719 focus(NULL);
1720 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1721 setclientstate(c, WithdrawnState);
1722 free(c->tags);
1723 free(c);
1724 XSync(dpy, False);
1725 XSetErrorHandler(xerror);
1726 XUngrabServer(dpy);
1727 arrange();
1728}
1729
1730void
1731unmapnotify(XEvent *e) {
1732 Client *c;
1733 XUnmapEvent *ev = &e->xunmap;
1734
1735 if((c = getclient(ev->window)))
1736 unmanage(c);
1737}
1738
1739void
1740updatebarpos(void) {
1741 XEvent ev;
1742
1743 wax = sx;
1744 way = sy;
1745 wah = sh;
1746 waw = sw;
1747 switch(bpos) {
1748 default:
1749 wah -= bh;
1750 way += bh;
1751 XMoveWindow(dpy, barwin, sx, sy);
1752 break;
1753 case BarBot:
1754 wah -= bh;
1755 XMoveWindow(dpy, barwin, sx, sy + wah);
1756 break;
1757 case BarOff:
1758 XMoveWindow(dpy, barwin, sx, sy - bh);
1759 break;
1760 }
1761 XSync(dpy, False);
1762 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1763}
1764
1765void
1766updatesizehints(Client *c) {
1767 long msize;
1768 XSizeHints size;
1769
1770 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1771 size.flags = PSize;
1772 c->flags = size.flags;
1773 if(c->flags & PBaseSize) {
1774 c->basew = size.base_width;
1775 c->baseh = size.base_height;
1776 }
1777 else if(c->flags & PMinSize) {
1778 c->basew = size.min_width;
1779 c->baseh = size.min_height;
1780 }
1781 else
1782 c->basew = c->baseh = 0;
1783 if(c->flags & PResizeInc) {
1784 c->incw = size.width_inc;
1785 c->inch = size.height_inc;
1786 }
1787 else
1788 c->incw = c->inch = 0;
1789 if(c->flags & PMaxSize) {
1790 c->maxw = size.max_width;
1791 c->maxh = size.max_height;
1792 }
1793 else
1794 c->maxw = c->maxh = 0;
1795 if(c->flags & PMinSize) {
1796 c->minw = size.min_width;
1797 c->minh = size.min_height;
1798 }
1799 else if(c->flags & PBaseSize) {
1800 c->minw = size.base_width;
1801 c->minh = size.base_height;
1802 }
1803 else
1804 c->minw = c->minh = 0;
1805 if(c->flags & PAspect) {
1806 c->minax = size.min_aspect.x;
1807 c->maxax = size.max_aspect.x;
1808 c->minay = size.min_aspect.y;
1809 c->maxay = size.max_aspect.y;
1810 }
1811 else
1812 c->minax = c->maxax = c->minay = c->maxay = 0;
1813 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1814 && c->maxw == c->minw && c->maxh == c->minh);
1815}
1816
1817void
1818updatetitle(Client *c) {
1819 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1820 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1821}
1822
1823/* There's no way to check accesses to destroyed windows, thus those cases are
1824 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1825 * default error handler, which may call exit. */
1826int
1827xerror(Display *dpy, XErrorEvent *ee) {
1828 if(ee->error_code == BadWindow
1829 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1830 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1831 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1832 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1833 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1834 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1835 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1836 return 0;
1837 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1838 ee->request_code, ee->error_code);
1839 return xerrorxlib(dpy, ee); /* may call exit */
1840}
1841
1842int
1843xerrordummy(Display *dsply, XErrorEvent *ee) {
1844 return 0;
1845}
1846
1847/* Startup Error handler to check if another window manager
1848 * is already running. */
1849int
1850xerrorstart(Display *dsply, XErrorEvent *ee) {
1851 otherwm = True;
1852 return -1;
1853}
1854
1855void
1856view(const char *arg) {
1857 unsigned int i;
1858
1859 memcpy(prevtags, seltags, sizeof seltags);
1860 for(i = 0; i < LENGTH(tags); i++)
1861 seltags[i] = (NULL == arg);
1862 seltags[idxoftag(arg)] = True;
1863 arrange();
1864}
1865
1866void
1867viewprevtag(const char *arg) {
1868 static Bool tmp[LENGTH(tags)];
1869
1870 memcpy(tmp, seltags, sizeof seltags);
1871 memcpy(seltags, prevtags, sizeof seltags);
1872 memcpy(prevtags, tmp, sizeof seltags);
1873 arrange();
1874}
1875
1876void
1877zoom(const char *arg) {
1878 Client *c;
1879
1880 if(!sel || !dozoom || sel->isfloating)
1881 return;
1882 if((c = sel) == nexttiled(clients))
1883 if(!(c = nexttiled(c->next)))
1884 return;
1885 detach(c);
1886 attach(c);
1887 focus(c);
1888 arrange();
1889}
1890
1891int
1892main(int argc, char *argv[]) {
1893 if(argc == 2 && !strcmp("-v", argv[1]))
1894 eprint("dwm-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk, "
1895 "Jukka Salmi, Premysl Hruby, Szabolcs Nagy\n");
1896 else if(argc != 1)
1897 eprint("usage: dwm [-v]\n");
1898
1899 setlocale(LC_CTYPE, "");
1900 if(!(dpy = XOpenDisplay(0)))
1901 eprint("dwm: cannot open display\n");
1902 screen = DefaultScreen(dpy);
1903 root = RootWindow(dpy, screen);
1904
1905 checkotherwm();
1906 setup();
1907 drawbar();
1908 scan();
1909 run();
1910 cleanup();
1911
1912 XCloseDisplay(dpy);
1913 return 0;
1914}