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 <X11/cursorfont.h>
37#include <X11/keysym.h>
38#include <X11/Xatom.h>
39#include <X11/Xlib.h>
40#include <X11/Xproto.h>
41#include <X11/Xutil.h>
42
43/* macros */
44#define MAX(a, b) ((a) > (b) ? (a) : (b))
45#define MIN(a, b) ((a) < (b) ? (a) : (b))
46#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
47#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
48#define LENGTH(x) (sizeof x / sizeof x[0])
49#define MAXTAGLEN 16
50#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
51
52/* enums */
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 fx, fy, fw, fh;
64 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
65 int minax, maxax, minay, maxay;
66 long flags;
67 unsigned int bw, oldbw;
68 Bool isbanned, isfixed, isfloating, isurgent;
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 Bool isfloating;
102} Layout;
103
104typedef struct {
105 const char *class;
106 const char *instance;
107 const char *title;
108 const char *tag;
109 Bool isfloating;
110} Rule;
111
112/* function declarations */
113void applyrules(Client *c);
114void arrange(void);
115void attach(Client *c);
116void attachstack(Client *c);
117void ban(Client *c);
118void buttonpress(XEvent *e);
119void checkotherwm(void);
120void cleanup(void);
121void configure(Client *c);
122void configurenotify(XEvent *e);
123void configurerequest(XEvent *e);
124unsigned int counttiled(void);
125void destroynotify(XEvent *e);
126void detach(Client *c);
127void detachstack(Client *c);
128void drawbar(void);
129void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
130void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
131void *emallocz(unsigned int size);
132void enternotify(XEvent *e);
133void eprint(const char *errstr, ...);
134void expose(XEvent *e);
135void focus(Client *c);
136void focusin(XEvent *e);
137void focusnext(const char *arg);
138void focusprev(const char *arg);
139Client *getclient(Window w);
140unsigned long getcolor(const char *colstr);
141long getstate(Window w);
142Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
143void grabbuttons(Client *c, Bool focused);
144void grabkeys(void);
145unsigned int idxoftag(const char *t);
146void initfont(const char *fontstr);
147Bool isoccupied(unsigned int t);
148Bool isprotodel(Client *c);
149Bool isurgent(unsigned int t);
150Bool isvisible(Client *c, Bool *cmp);
151void keypress(XEvent *e);
152void killclient(const char *arg);
153void manage(Window w, XWindowAttributes *wa);
154void mappingnotify(XEvent *e);
155void maprequest(XEvent *e);
156void monocle(void);
157void movemouse(Client *c);
158Client *nexttiled(Client *c);
159void propertynotify(XEvent *e);
160void quit(const char *arg);
161void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
162void resizemouse(Client *c);
163void restack(void);
164void run(void);
165void scan(void);
166void setclientstate(Client *c, long state);
167void setmfact(const char *arg);
168void setup(void);
169void spawn(const char *arg);
170void tag(const char *arg);
171unsigned int textnw(const char *text, unsigned int len);
172unsigned int textw(const char *text);
173void tileh(void);
174void tilehstack(unsigned int n);
175Client *tilemaster(unsigned int n);
176void tileresize(Client *c, int x, int y, int w, int h);
177void tilev(void);
178void tilevstack(unsigned int n);
179void togglefloating(const char *arg);
180void togglelayout(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 updatebar(void);
187void updategeom(void);
188void updatesizehints(Client *c);
189void updatetitle(Client *c);
190void updatewmhints(Client *c);
191void view(const char *arg);
192void viewprevtag(const char *arg); /* views previous selected tags */
193int xerror(Display *dpy, XErrorEvent *ee);
194int xerrordummy(Display *dpy, XErrorEvent *ee);
195int xerrorstart(Display *dpy, XErrorEvent *ee);
196void zoom(const char *arg);
197
198/* variables */
199char stext[256];
200int screen, sx, sy, sw, sh;
201int (*xerrorxlib)(Display *, XErrorEvent *);
202int bx, by, bw, bh, blw, mx, my, mw, mh, tx, ty, tw, th, wx, wy, ww, wh;
203int seltags = 0;
204double mfact;
205unsigned int numlockmask = 0;
206void (*handler[LASTEvent]) (XEvent *) = {
207 [ButtonPress] = buttonpress,
208 [ConfigureRequest] = configurerequest,
209 [ConfigureNotify] = configurenotify,
210 [DestroyNotify] = destroynotify,
211 [EnterNotify] = enternotify,
212 [Expose] = expose,
213 [FocusIn] = focusin,
214 [KeyPress] = keypress,
215 [MappingNotify] = mappingnotify,
216 [MapRequest] = maprequest,
217 [PropertyNotify] = propertynotify,
218 [UnmapNotify] = unmapnotify
219};
220Atom wmatom[WMLast], netatom[NetLast];
221Bool otherwm, readin;
222Bool running = True;
223Bool *tagset[2];
224Client *clients = NULL;
225Client *sel = NULL;
226Client *stack = NULL;
227Cursor cursor[CurLast];
228Display *dpy;
229DC dc = {0};
230Layout layouts[];
231Layout *lt = layouts;
232Window root, barwin;
233
234/* configuration, allows nested code to access above variables */
235#include "config.h"
236#define TAGSZ (LENGTH(tags) * sizeof(Bool))
237
238/* function implementations */
239
240void
241applyrules(Client *c) {
242 unsigned int i;
243 Bool matched = False;
244 Rule *r;
245 XClassHint ch = { 0 };
246
247 /* rule matching */
248 XGetClassHint(dpy, c->win, &ch);
249 for(i = 0; i < LENGTH(rules); i++) {
250 r = &rules[i];
251 if((!r->title || strstr(c->name, r->title))
252 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
253 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
254 c->isfloating = r->isfloating;
255 if(r->tag) {
256 c->tags[idxoftag(r->tag)] = True;
257 matched = True;
258 }
259 }
260 }
261 if(ch.res_class)
262 XFree(ch.res_class);
263 if(ch.res_name)
264 XFree(ch.res_name);
265 if(!matched)
266 memcpy(c->tags, tagset[seltags], TAGSZ);
267}
268
269void
270arrange(void) {
271 Client *c;
272
273 for(c = clients; c; c = c->next)
274 if(isvisible(c, NULL)) {
275 unban(c);
276 if(lt->isfloating || c->isfloating)
277 resize(c, c->fx, c->fy, c->fw, c->fh, True);
278 }
279 else
280 ban(c);
281
282 focus(NULL);
283 if(lt->arrange)
284 lt->arrange();
285 restack();
286}
287
288void
289attach(Client *c) {
290 if(clients)
291 clients->prev = c;
292 c->next = clients;
293 clients = c;
294}
295
296void
297attachstack(Client *c) {
298 c->snext = stack;
299 stack = c;
300}
301
302void
303ban(Client *c) {
304 if(c->isbanned)
305 return;
306 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
307 c->isbanned = True;
308}
309
310void
311buttonpress(XEvent *e) {
312 unsigned int i, x;
313 Client *c;
314 XButtonPressedEvent *ev = &e->xbutton;
315
316 if(ev->window == barwin) {
317 x = 0;
318 for(i = 0; i < LENGTH(tags); i++) {
319 x += textw(tags[i]);
320 if(ev->x < x) {
321 if(ev->button == Button1) {
322 if(ev->state & MODKEY)
323 tag(tags[i]);
324 else
325 view(tags[i]);
326 }
327 else if(ev->button == Button3) {
328 if(ev->state & MODKEY)
329 toggletag(tags[i]);
330 else
331 toggleview(tags[i]);
332 }
333 return;
334 }
335 }
336 if((ev->x < x + blw) && ev->button == Button1)
337 togglelayout(NULL);
338 }
339 else if((c = getclient(ev->window))) {
340 focus(c);
341 if(CLEANMASK(ev->state) != MODKEY)
342 return;
343 if(ev->button == Button1) {
344 restack();
345 movemouse(c);
346 }
347 else if(ev->button == Button2) {
348 if(!lt->isfloating && c->isfloating)
349 togglefloating(NULL);
350 else
351 zoom(NULL);
352 }
353 else if(ev->button == Button3 && !c->isfixed) {
354 restack();
355 resizemouse(c);
356 }
357 }
358}
359
360void
361checkotherwm(void) {
362 otherwm = False;
363 XSetErrorHandler(xerrorstart);
364
365 /* this causes an error if some other window manager is running */
366 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
367 XSync(dpy, False);
368 if(otherwm)
369 eprint("dwm: another window manager is already running\n");
370 XSync(dpy, False);
371 XSetErrorHandler(NULL);
372 xerrorxlib = XSetErrorHandler(xerror);
373 XSync(dpy, False);
374}
375
376void
377cleanup(void) {
378 close(STDIN_FILENO);
379 while(stack) {
380 unban(stack);
381 unmanage(stack);
382 }
383 if(dc.font.set)
384 XFreeFontSet(dpy, dc.font.set);
385 else
386 XFreeFont(dpy, dc.font.xfont);
387 XUngrabKey(dpy, AnyKey, AnyModifier, root);
388 XFreePixmap(dpy, dc.drawable);
389 XFreeGC(dpy, dc.gc);
390 XFreeCursor(dpy, cursor[CurNormal]);
391 XFreeCursor(dpy, cursor[CurResize]);
392 XFreeCursor(dpy, cursor[CurMove]);
393 XDestroyWindow(dpy, barwin);
394 XSync(dpy, False);
395 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
396}
397
398void
399configure(Client *c) {
400 XConfigureEvent ce;
401
402 ce.type = ConfigureNotify;
403 ce.display = dpy;
404 ce.event = c->win;
405 ce.window = c->win;
406 ce.x = c->x;
407 ce.y = c->y;
408 ce.width = c->w;
409 ce.height = c->h;
410 ce.border_width = c->bw;
411 ce.above = None;
412 ce.override_redirect = False;
413 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
414}
415
416void
417configurenotify(XEvent *e) {
418 XConfigureEvent *ev = &e->xconfigure;
419
420 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
421 sw = ev->width;
422 sh = ev->height;
423 updategeom();
424 updatebar();
425 arrange();
426 }
427}
428
429void
430configurerequest(XEvent *e) {
431 Client *c;
432 XConfigureRequestEvent *ev = &e->xconfigurerequest;
433 XWindowChanges wc;
434
435 if((c = getclient(ev->window))) {
436 if(ev->value_mask & CWBorderWidth)
437 c->bw = ev->border_width;
438 if(c->isfixed || c->isfloating || lt->isfloating) {
439 if(ev->value_mask & CWX)
440 c->x = sx + ev->x;
441 if(ev->value_mask & CWY)
442 c->y = sy + ev->y;
443 if(ev->value_mask & CWWidth)
444 c->w = ev->width;
445 if(ev->value_mask & CWHeight)
446 c->h = ev->height;
447 if((c->x - sx + c->w) > sw && c->isfloating)
448 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
449 if((c->y - sy + c->h) > sh && c->isfloating)
450 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
451 if((ev->value_mask & (CWX|CWY))
452 && !(ev->value_mask & (CWWidth|CWHeight)))
453 configure(c);
454 if(isvisible(c, NULL))
455 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
456 }
457 else
458 configure(c);
459 }
460 else {
461 wc.x = ev->x;
462 wc.y = ev->y;
463 wc.width = ev->width;
464 wc.height = ev->height;
465 wc.border_width = ev->border_width;
466 wc.sibling = ev->above;
467 wc.stack_mode = ev->detail;
468 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
469 }
470 XSync(dpy, False);
471}
472
473unsigned int
474counttiled(void) {
475 unsigned int n;
476 Client *c;
477
478 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
479 return n;
480}
481
482void
483destroynotify(XEvent *e) {
484 Client *c;
485 XDestroyWindowEvent *ev = &e->xdestroywindow;
486
487 if((c = getclient(ev->window)))
488 unmanage(c);
489}
490
491void
492detach(Client *c) {
493 if(c->prev)
494 c->prev->next = c->next;
495 if(c->next)
496 c->next->prev = c->prev;
497 if(c == clients)
498 clients = c->next;
499 c->next = c->prev = NULL;
500}
501
502void
503detachstack(Client *c) {
504 Client **tc;
505
506 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
507 *tc = c->snext;
508}
509
510void
511drawbar(void) {
512 int i, x;
513 Client *c;
514
515 dc.x = 0;
516 for(c = stack; c && !isvisible(c, NULL); c = c->snext);
517 for(i = 0; i < LENGTH(tags); i++) {
518 dc.w = textw(tags[i]);
519 if(tagset[seltags][i]) {
520 drawtext(tags[i], dc.sel, isurgent(i));
521 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
522 }
523 else {
524 drawtext(tags[i], dc.norm, isurgent(i));
525 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
526 }
527 dc.x += dc.w;
528 }
529 if(blw > 0) {
530 dc.w = blw;
531 drawtext(lt->symbol, dc.norm, False);
532 x = dc.x + dc.w;
533 }
534 else
535 x = dc.x;
536 dc.w = textw(stext);
537 dc.x = bw - dc.w;
538 if(dc.x < x) {
539 dc.x = x;
540 dc.w = bw - x;
541 }
542 drawtext(stext, dc.norm, False);
543 if((dc.w = dc.x - x) > bh) {
544 dc.x = x;
545 if(c) {
546 drawtext(c->name, dc.sel, False);
547 drawsquare(False, c->isfloating, False, dc.sel);
548 }
549 else
550 drawtext(NULL, dc.norm, False);
551 }
552 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
553 XSync(dpy, False);
554}
555
556void
557drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
558 int x;
559 XGCValues gcv;
560 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
561
562 gcv.foreground = col[invert ? ColBG : ColFG];
563 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
564 x = (dc.font.ascent + dc.font.descent + 2) / 4;
565 r.x = dc.x + 1;
566 r.y = dc.y + 1;
567 if(filled) {
568 r.width = r.height = x + 1;
569 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
570 }
571 else if(empty) {
572 r.width = r.height = x;
573 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
574 }
575}
576
577void
578drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
579 int x, y, w, h;
580 unsigned int len, olen;
581 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
582 char buf[256];
583
584 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
585 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
586 if(!text)
587 return;
588 olen = strlen(text);
589 len = MIN(olen, sizeof buf);
590 memcpy(buf, text, len);
591 w = 0;
592 h = dc.font.ascent + dc.font.descent;
593 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
594 x = dc.x + (h / 2);
595 /* shorten text if necessary */
596 for(; len && (w = textnw(buf, len)) > dc.w - h; len--);
597 if(!len)
598 return;
599 if(len < olen) {
600 if(len > 1)
601 buf[len - 1] = '.';
602 if(len > 2)
603 buf[len - 2] = '.';
604 if(len > 3)
605 buf[len - 3] = '.';
606 }
607 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
608 if(dc.font.set)
609 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
610 else
611 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
612}
613
614void *
615emallocz(unsigned int size) {
616 void *res = calloc(1, size);
617
618 if(!res)
619 eprint("fatal: could not malloc() %u bytes\n", size);
620 return res;
621}
622
623void
624enternotify(XEvent *e) {
625 Client *c;
626 XCrossingEvent *ev = &e->xcrossing;
627
628 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
629 return;
630 if((c = getclient(ev->window)))
631 focus(c);
632 else
633 focus(NULL);
634}
635
636void
637eprint(const char *errstr, ...) {
638 va_list ap;
639
640 va_start(ap, errstr);
641 vfprintf(stderr, errstr, ap);
642 va_end(ap);
643 exit(EXIT_FAILURE);
644}
645
646void
647expose(XEvent *e) {
648 XExposeEvent *ev = &e->xexpose;
649
650 if(ev->count == 0 && (ev->window == barwin))
651 drawbar();
652}
653
654void
655focus(Client *c) {
656 if(!c || (c && !isvisible(c, NULL)))
657 for(c = stack; c && !isvisible(c, NULL); c = c->snext);
658 if(sel && sel != c) {
659 grabbuttons(sel, False);
660 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
661 }
662 if(c) {
663 detachstack(c);
664 attachstack(c);
665 grabbuttons(c, True);
666 }
667 sel = c;
668 if(c) {
669 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
670 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
671 }
672 else
673 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
674 drawbar();
675}
676
677void
678focusin(XEvent *e) { /* there are some broken focus acquiring clients */
679 XFocusChangeEvent *ev = &e->xfocus;
680
681 if(sel && ev->window != sel->win)
682 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
683}
684
685void
686focusnext(const char *arg) {
687 Client *c;
688
689 if(!sel)
690 return;
691 for(c = sel->next; c && !isvisible(c, arg ? sel->tags : NULL); c = c->next);
692 if(!c)
693 for(c = clients; c && !isvisible(c, arg ? sel->tags : NULL); c = c->next);
694 if(c) {
695 focus(c);
696 restack();
697 }
698}
699
700void
701focusprev(const char *arg) {
702 Client *c;
703
704 if(!sel)
705 return;
706 for(c = sel->prev; c && !isvisible(c, arg ? sel->tags : NULL); c = c->prev);
707 if(!c) {
708 for(c = clients; c && c->next; c = c->next);
709 for(; c && !isvisible(c, arg ? sel->tags : NULL); c = c->prev);
710 }
711 if(c) {
712 focus(c);
713 restack();
714 }
715}
716
717Client *
718getclient(Window w) {
719 Client *c;
720
721 for(c = clients; c && c->win != w; c = c->next);
722 return c;
723}
724
725unsigned long
726getcolor(const char *colstr) {
727 Colormap cmap = DefaultColormap(dpy, screen);
728 XColor color;
729
730 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
731 eprint("error, cannot allocate color '%s'\n", colstr);
732 return color.pixel;
733}
734
735long
736getstate(Window w) {
737 int format, status;
738 long result = -1;
739 unsigned char *p = NULL;
740 unsigned long n, extra;
741 Atom real;
742
743 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
744 &real, &format, &n, &extra, (unsigned char **)&p);
745 if(status != Success)
746 return -1;
747 if(n != 0)
748 result = *p;
749 XFree(p);
750 return result;
751}
752
753Bool
754gettextprop(Window w, Atom atom, char *text, unsigned int size) {
755 char **list = NULL;
756 int n;
757 XTextProperty name;
758
759 if(!text || size == 0)
760 return False;
761 text[0] = '\0';
762 XGetTextProperty(dpy, w, &name, atom);
763 if(!name.nitems)
764 return False;
765 if(name.encoding == XA_STRING)
766 strncpy(text, (char *)name.value, size - 1);
767 else {
768 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
769 && n > 0 && *list) {
770 strncpy(text, *list, size - 1);
771 XFreeStringList(list);
772 }
773 }
774 text[size - 1] = '\0';
775 XFree(name.value);
776 return True;
777}
778
779void
780grabbuttons(Client *c, Bool focused) {
781 int i, j;
782 unsigned int buttons[] = { Button1, Button2, Button3 };
783 unsigned int modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask,
784 MODKEY|numlockmask|LockMask} ;
785
786 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
787 if(focused)
788 for(i = 0; i < LENGTH(buttons); i++)
789 for(j = 0; j < LENGTH(modifiers); j++)
790 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
791 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
792 else
793 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
794 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
795}
796
797void
798grabkeys(void) {
799 unsigned int i, j;
800 KeyCode code;
801 XModifierKeymap *modmap;
802
803 /* init modifier map */
804 modmap = XGetModifierMapping(dpy);
805 for(i = 0; i < 8; i++)
806 for(j = 0; j < modmap->max_keypermod; j++) {
807 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
808 numlockmask = (1 << i);
809 }
810 XFreeModifiermap(modmap);
811
812 XUngrabKey(dpy, AnyKey, AnyModifier, root);
813 for(i = 0; i < LENGTH(keys); i++) {
814 code = XKeysymToKeycode(dpy, keys[i].keysym);
815 XGrabKey(dpy, code, keys[i].mod, root, True,
816 GrabModeAsync, GrabModeAsync);
817 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
818 GrabModeAsync, GrabModeAsync);
819 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
820 GrabModeAsync, GrabModeAsync);
821 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
822 GrabModeAsync, GrabModeAsync);
823 }
824}
825
826unsigned int
827idxoftag(const char *t) {
828 unsigned int i;
829
830 for(i = 0; (i < LENGTH(tags)) && t && strcmp(tags[i], t); i++);
831 return (i < LENGTH(tags)) ? i : 0;
832}
833
834void
835initfont(const char *fontstr) {
836 char *def, **missing;
837 int i, n;
838
839 missing = NULL;
840 if(dc.font.set)
841 XFreeFontSet(dpy, dc.font.set);
842 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
843 if(missing) {
844 while(n--)
845 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
846 XFreeStringList(missing);
847 }
848 if(dc.font.set) {
849 XFontSetExtents *font_extents;
850 XFontStruct **xfonts;
851 char **font_names;
852 dc.font.ascent = dc.font.descent = 0;
853 font_extents = XExtentsOfFontSet(dc.font.set);
854 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
855 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
856 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
857 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
858 xfonts++;
859 }
860 }
861 else {
862 if(dc.font.xfont)
863 XFreeFont(dpy, dc.font.xfont);
864 dc.font.xfont = NULL;
865 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
866 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
867 eprint("error, cannot load font: '%s'\n", fontstr);
868 dc.font.ascent = dc.font.xfont->ascent;
869 dc.font.descent = dc.font.xfont->descent;
870 }
871 dc.font.height = dc.font.ascent + dc.font.descent;
872}
873
874Bool
875isoccupied(unsigned int t) {
876 Client *c;
877
878 for(c = clients; c; c = c->next)
879 if(c->tags[t])
880 return True;
881 return False;
882}
883
884Bool
885isprotodel(Client *c) {
886 int i, n;
887 Atom *protocols;
888 Bool ret = False;
889
890 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
891 for(i = 0; !ret && i < n; i++)
892 if(protocols[i] == wmatom[WMDelete])
893 ret = True;
894 XFree(protocols);
895 }
896 return ret;
897}
898
899Bool
900isurgent(unsigned int t) {
901 Client *c;
902
903 for(c = clients; c; c = c->next)
904 if(c->isurgent && c->tags[t])
905 return True;
906 return False;
907}
908
909Bool
910isvisible(Client *c, Bool *cmp) {
911 unsigned int i;
912
913 if(!cmp)
914 cmp = tagset[seltags];
915 for(i = 0; i < LENGTH(tags); i++)
916 if(c->tags[i] && cmp[i])
917 return True;
918 return False;
919}
920
921void
922keypress(XEvent *e) {
923 unsigned int i;
924 KeySym keysym;
925 XKeyEvent *ev;
926
927 ev = &e->xkey;
928 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
929 for(i = 0; i < LENGTH(keys); i++)
930 if(keysym == keys[i].keysym
931 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
932 {
933 if(keys[i].func)
934 keys[i].func(keys[i].arg);
935 }
936}
937
938void
939killclient(const char *arg) {
940 XEvent ev;
941
942 if(!sel)
943 return;
944 if(isprotodel(sel)) {
945 ev.type = ClientMessage;
946 ev.xclient.window = sel->win;
947 ev.xclient.message_type = wmatom[WMProtocols];
948 ev.xclient.format = 32;
949 ev.xclient.data.l[0] = wmatom[WMDelete];
950 ev.xclient.data.l[1] = CurrentTime;
951 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
952 }
953 else
954 XKillClient(dpy, sel->win);
955}
956
957void
958manage(Window w, XWindowAttributes *wa) {
959 Client *c, *t = NULL;
960 Status rettrans;
961 Window trans;
962 XWindowChanges wc;
963
964 c = emallocz(sizeof(Client));
965 c->tags = emallocz(TAGSZ);
966 c->win = w;
967
968 /* geometry */
969 c->x = wa->x;
970 c->y = wa->y;
971 c->w = c->fw = wa->width;
972 c->h = c->fh = wa->height;
973 c->oldbw = wa->border_width;
974 if(c->w == sw && c->h == sh) {
975 c->x = sx;
976 c->y = sy;
977 c->bw = wa->border_width;
978 }
979 else {
980 if(c->x + c->w + 2 * c->bw > wx + ww)
981 c->x = wx + ww - c->w - 2 * c->bw;
982 if(c->y + c->h + 2 * c->bw > wy + wh)
983 c->y = wy + wh - c->h - 2 * c->bw;
984 c->x = MAX(c->x, wx);
985 c->y = MAX(c->y, wy);
986 c->bw = BORDERPX;
987 }
988 c->fx = c->x;
989 c->fy = c->y;
990
991 wc.border_width = c->bw;
992 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
993 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
994 configure(c); /* propagates border_width, if size doesn't change */
995 updatesizehints(c);
996 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
997 grabbuttons(c, False);
998 updatetitle(c);
999 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1000 for(t = clients; t && t->win != trans; t = t->next);
1001 if(t)
1002 memcpy(c->tags, t->tags, TAGSZ);
1003 else
1004 applyrules(c);
1005 if(!c->isfloating)
1006 c->isfloating = (rettrans == Success) || c->isfixed;
1007 attach(c);
1008 attachstack(c);
1009 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1010 ban(c);
1011 XMapWindow(dpy, c->win);
1012 setclientstate(c, NormalState);
1013 arrange();
1014}
1015
1016void
1017mappingnotify(XEvent *e) {
1018 XMappingEvent *ev = &e->xmapping;
1019
1020 XRefreshKeyboardMapping(ev);
1021 if(ev->request == MappingKeyboard)
1022 grabkeys();
1023}
1024
1025void
1026maprequest(XEvent *e) {
1027 static XWindowAttributes wa;
1028 XMapRequestEvent *ev = &e->xmaprequest;
1029
1030 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1031 return;
1032 if(wa.override_redirect)
1033 return;
1034 if(!getclient(ev->window))
1035 manage(ev->window, &wa);
1036}
1037
1038void
1039monocle(void) {
1040 Client *c;
1041
1042 for(c = clients; c; c = c->next)
1043 if((lt->isfloating || !c->isfloating) && isvisible(c, NULL))
1044 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, RESIZEHINTS);
1045}
1046
1047void
1048movemouse(Client *c) {
1049 int x1, y1, ocx, ocy, di, nx, ny;
1050 unsigned int dui;
1051 Window dummy;
1052 XEvent ev;
1053
1054 ocx = nx = c->x;
1055 ocy = ny = c->y;
1056 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1057 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1058 return;
1059 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1060 for(;;) {
1061 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1062 switch (ev.type) {
1063 case ButtonRelease:
1064 XUngrabPointer(dpy, CurrentTime);
1065 return;
1066 case ConfigureRequest:
1067 case Expose:
1068 case MapRequest:
1069 handler[ev.type](&ev);
1070 break;
1071 case MotionNotify:
1072 XSync(dpy, False);
1073 nx = ocx + (ev.xmotion.x - x1);
1074 ny = ocy + (ev.xmotion.y - y1);
1075 if(abs(wx - nx) < SNAP)
1076 nx = wx;
1077 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < SNAP)
1078 nx = wx + ww - c->w - 2 * c->bw;
1079 if(abs(wy - ny) < SNAP)
1080 ny = wy;
1081 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < SNAP)
1082 ny = wy + wh - c->h - 2 * c->bw;
1083 if(!c->isfloating && !lt->isfloating && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1084 togglefloating(NULL);
1085 if(lt->isfloating || c->isfloating) {
1086 c->fx = nx;
1087 c->fy = ny;
1088 resize(c, nx, ny, c->w, c->h, False);
1089 }
1090 break;
1091 }
1092 }
1093}
1094
1095Client *
1096nexttiled(Client *c) {
1097 for(; c && (c->isfloating || !isvisible(c, NULL)); c = c->next);
1098 return c;
1099}
1100
1101void
1102propertynotify(XEvent *e) {
1103 Client *c;
1104 Window trans;
1105 XPropertyEvent *ev = &e->xproperty;
1106
1107 if(ev->state == PropertyDelete)
1108 return; /* ignore */
1109 if((c = getclient(ev->window))) {
1110 switch (ev->atom) {
1111 default: break;
1112 case XA_WM_TRANSIENT_FOR:
1113 XGetTransientForHint(dpy, c->win, &trans);
1114 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1115 arrange();
1116 break;
1117 case XA_WM_NORMAL_HINTS:
1118 updatesizehints(c);
1119 break;
1120 case XA_WM_HINTS:
1121 updatewmhints(c);
1122 drawbar();
1123 break;
1124 }
1125 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1126 updatetitle(c);
1127 if(c == sel)
1128 drawbar();
1129 }
1130 }
1131}
1132
1133void
1134quit(const char *arg) {
1135 readin = running = False;
1136}
1137
1138void
1139resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1140 XWindowChanges wc;
1141
1142 if(sizehints) {
1143 /* set minimum possible */
1144 w = MAX(1, w);
1145 h = MAX(1, h);
1146
1147 /* temporarily remove base dimensions */
1148 w -= c->basew;
1149 h -= c->baseh;
1150
1151 /* adjust for aspect limits */
1152 if(c->minax != c->maxax && c->minay != c->maxay
1153 && c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0) {
1154 if(w * c->maxay > h * c->maxax)
1155 w = h * c->maxax / c->maxay;
1156 else if(w * c->minay < h * c->minax)
1157 h = w * c->minay / c->minax;
1158 }
1159
1160 /* adjust for increment value */
1161 if(c->incw)
1162 w -= w % c->incw;
1163 if(c->inch)
1164 h -= h % c->inch;
1165
1166 /* restore base dimensions */
1167 w += c->basew;
1168 h += c->baseh;
1169
1170 w = MAX(w, c->minw);
1171 h = MAX(h, c->minh);
1172
1173 if (c->maxw)
1174 w = MIN(w, c->maxw);
1175
1176 if (c->maxh)
1177 h = MIN(h, c->maxh);
1178 }
1179 if(w <= 0 || h <= 0)
1180 return;
1181 if(x > sx + sw)
1182 x = sw - w - 2 * c->bw;
1183 if(y > sy + sh)
1184 y = sh - h - 2 * c->bw;
1185 if(x + w + 2 * c->bw < sx)
1186 x = sx;
1187 if(y + h + 2 * c->bw < sy)
1188 y = sy;
1189 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1190 c->x = wc.x = x;
1191 c->y = wc.y = y;
1192 c->w = wc.width = w;
1193 c->h = wc.height = h;
1194 wc.border_width = c->bw;
1195 XConfigureWindow(dpy, c->win,
1196 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1197 configure(c);
1198 XSync(dpy, False);
1199 }
1200}
1201
1202void
1203resizemouse(Client *c) {
1204 int ocx, ocy;
1205 int nw, nh;
1206 XEvent ev;
1207
1208 ocx = c->x;
1209 ocy = c->y;
1210 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1211 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1212 return;
1213 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1214 for(;;) {
1215 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1216 switch(ev.type) {
1217 case ButtonRelease:
1218 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1219 c->w + c->bw - 1, c->h + c->bw - 1);
1220 XUngrabPointer(dpy, CurrentTime);
1221 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1222 return;
1223 case ConfigureRequest:
1224 case Expose:
1225 case MapRequest:
1226 handler[ev.type](&ev);
1227 break;
1228 case MotionNotify:
1229 XSync(dpy, False);
1230 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1231 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1232 if(!c->isfloating && !lt->isfloating && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP)) {
1233 c->fx = c->x;
1234 c->fy = c->y;
1235 togglefloating(NULL);
1236 }
1237 if((lt->isfloating) || c->isfloating) {
1238 resize(c, c->x, c->y, nw, nh, True);
1239 c->fw = nw;
1240 c->fh = nh;
1241 }
1242 break;
1243 }
1244 }
1245}
1246
1247void
1248restack(void) {
1249 Client *c;
1250 XEvent ev;
1251 XWindowChanges wc;
1252
1253 drawbar();
1254 if(!sel)
1255 return;
1256 if(sel->isfloating || lt->isfloating)
1257 XRaiseWindow(dpy, sel->win);
1258 if(!lt->isfloating) {
1259 wc.stack_mode = Below;
1260 wc.sibling = barwin;
1261 for(c = stack; c; c = c->snext)
1262 if(!c->isfloating && isvisible(c, NULL)) {
1263 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1264 wc.sibling = c->win;
1265 }
1266 }
1267 XSync(dpy, False);
1268 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1269}
1270
1271void
1272run(void) {
1273 char *p;
1274 char sbuf[sizeof stext];
1275 fd_set rd;
1276 int r, xfd;
1277 unsigned int len, offset;
1278 XEvent ev;
1279
1280 /* main event loop, also reads status text from stdin */
1281 XSync(dpy, False);
1282 xfd = ConnectionNumber(dpy);
1283 readin = True;
1284 offset = 0;
1285 len = sizeof stext - 1;
1286 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1287 while(running) {
1288 FD_ZERO(&rd);
1289 if(readin)
1290 FD_SET(STDIN_FILENO, &rd);
1291 FD_SET(xfd, &rd);
1292 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1293 if(errno == EINTR)
1294 continue;
1295 eprint("select failed\n");
1296 }
1297 if(FD_ISSET(STDIN_FILENO, &rd)) {
1298 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1299 case -1:
1300 strncpy(stext, strerror(errno), len);
1301 readin = False;
1302 break;
1303 case 0:
1304 strncpy(stext, "EOF", 4);
1305 readin = False;
1306 break;
1307 default:
1308 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1309 if(*p == '\n' || *p == '\0') {
1310 *p = '\0';
1311 strncpy(stext, sbuf, len);
1312 p += r - 1; /* p is sbuf + offset + r - 1 */
1313 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1314 offset = r;
1315 if(r)
1316 memmove(sbuf, p - r + 1, r);
1317 break;
1318 }
1319 break;
1320 }
1321 drawbar();
1322 }
1323 while(XPending(dpy)) {
1324 XNextEvent(dpy, &ev);
1325 if(handler[ev.type])
1326 (handler[ev.type])(&ev); /* call handler */
1327 }
1328 }
1329}
1330
1331void
1332scan(void) {
1333 unsigned int i, num;
1334 Window *wins, d1, d2;
1335 XWindowAttributes wa;
1336
1337 wins = NULL;
1338 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1339 for(i = 0; i < num; i++) {
1340 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1341 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1342 continue;
1343 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1344 manage(wins[i], &wa);
1345 }
1346 for(i = 0; i < num; i++) { /* now the transients */
1347 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1348 continue;
1349 if(XGetTransientForHint(dpy, wins[i], &d1)
1350 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1351 manage(wins[i], &wa);
1352 }
1353 }
1354 if(wins)
1355 XFree(wins);
1356}
1357
1358void
1359setclientstate(Client *c, long state) {
1360 long data[] = {state, None};
1361
1362 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1363 PropModeReplace, (unsigned char *)data, 2);
1364}
1365
1366void
1367setmfact(const char *arg) {
1368 double d;
1369
1370 if(lt->isfloating)
1371 return;
1372 if(!arg)
1373 mfact = MFACT;
1374 else {
1375 d = strtod(arg, NULL);
1376 if(arg[0] == '-' || arg[0] == '+')
1377 d += mfact;
1378 if(d < 0.1 || d > 0.9)
1379 return;
1380 mfact = d;
1381 }
1382 updategeom();
1383 arrange();
1384}
1385
1386void
1387setup(void) {
1388 unsigned int i, w;
1389 XSetWindowAttributes wa;
1390
1391 /* init screen */
1392 screen = DefaultScreen(dpy);
1393 root = RootWindow(dpy, screen);
1394 initfont(FONT);
1395 sx = 0;
1396 sy = 0;
1397 sw = DisplayWidth(dpy, screen);
1398 sh = DisplayHeight(dpy, screen);
1399 bh = dc.font.height + 2;
1400 mfact = MFACT;
1401 updategeom();
1402
1403 /* init atoms */
1404 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1405 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1406 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1407 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1408 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1409 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1410
1411 /* init cursors */
1412 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1413 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1414 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1415
1416 /* init appearance */
1417 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1418 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1419 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1420 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1421 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1422 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1423 initfont(FONT);
1424 dc.h = bh;
1425 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1426 dc.gc = XCreateGC(dpy, root, 0, 0);
1427 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1428 if(!dc.font.set)
1429 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1430
1431 /* init tags */
1432 tagset[0] = emallocz(TAGSZ);
1433 tagset[1] = emallocz(TAGSZ);
1434 tagset[0][0] = tagset[1][0] = True;
1435
1436 /* init bar */
1437 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1438 w = textw(layouts[i].symbol);
1439 blw = MAX(blw, w);
1440 }
1441
1442 wa.override_redirect = 1;
1443 wa.background_pixmap = ParentRelative;
1444 wa.event_mask = ButtonPressMask|ExposureMask;
1445
1446 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1447 CopyFromParent, DefaultVisual(dpy, screen),
1448 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1449 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1450 XMapRaised(dpy, barwin);
1451 strcpy(stext, "dwm-"VERSION);
1452 drawbar();
1453
1454 /* EWMH support per view */
1455 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1456 PropModeReplace, (unsigned char *) netatom, NetLast);
1457
1458 /* select for events */
1459 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1460 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1461 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1462 XSelectInput(dpy, root, wa.event_mask);
1463
1464
1465 /* grab keys */
1466 grabkeys();
1467}
1468
1469void
1470spawn(const char *arg) {
1471 static char *shell = NULL;
1472
1473 if(!shell && !(shell = getenv("SHELL")))
1474 shell = "/bin/sh";
1475 if(!arg)
1476 return;
1477 /* The double-fork construct avoids zombie processes and keeps the code
1478 * clean from stupid signal handlers. */
1479 if(fork() == 0) {
1480 if(fork() == 0) {
1481 if(dpy)
1482 close(ConnectionNumber(dpy));
1483 setsid();
1484 execl(shell, shell, "-c", arg, (char *)NULL);
1485 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1486 perror(" failed");
1487 }
1488 exit(0);
1489 }
1490 wait(0);
1491}
1492
1493void
1494tag(const char *arg) {
1495 unsigned int i;
1496
1497 if(!sel)
1498 return;
1499 for(i = 0; i < LENGTH(tags); i++)
1500 sel->tags[i] = (arg == NULL);
1501 sel->tags[idxoftag(arg)] = True;
1502 arrange();
1503}
1504
1505unsigned int
1506textnw(const char *text, unsigned int len) {
1507 XRectangle r;
1508
1509 if(dc.font.set) {
1510 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1511 return r.width;
1512 }
1513 return XTextWidth(dc.font.xfont, text, len);
1514}
1515
1516unsigned int
1517textw(const char *text) {
1518 return textnw(text, strlen(text)) + dc.font.height;
1519}
1520
1521void
1522tileh(void) {
1523 int x, w;
1524 unsigned int i, n = counttiled();
1525 Client *c;
1526
1527 if(n == 0)
1528 return;
1529 c = tilemaster(n);
1530 if(--n == 0)
1531 return;
1532
1533 x = tx;
1534 w = tw / n;
1535 if(w < bh)
1536 w = tw;
1537
1538 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1539 if(i + 1 == n) /* remainder */
1540 tileresize(c, x, ty, (tx + tw) - x - 2 * c->bw, th - 2 * c->bw);
1541 else
1542 tileresize(c, x, ty, w - 2 * c->bw, th - 2 * c->bw);
1543 if(w != tw)
1544 x = c->x + c->w + 2 * c->bw;
1545 }
1546}
1547
1548Client *
1549tilemaster(unsigned int n) {
1550 Client *c = nexttiled(clients);
1551
1552 if(n == 1)
1553 tileresize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
1554 else
1555 tileresize(c, mx, my, mw - 2 * c->bw, mh - 2 * c->bw);
1556 return c;
1557}
1558
1559void
1560tileresize(Client *c, int x, int y, int w, int h) {
1561 resize(c, x, y, w, h, RESIZEHINTS);
1562 if((RESIZEHINTS) && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
1563 /* client doesn't accept size constraints */
1564 resize(c, x, y, w, h, False);
1565}
1566
1567void
1568tilev(void) {
1569 int y, h;
1570 unsigned int i, n = counttiled();
1571 Client *c;
1572
1573 if(n == 0)
1574 return;
1575 c = tilemaster(n);
1576 if(--n == 0)
1577 return;
1578
1579 y = ty;
1580 h = th / n;
1581 if(h < bh)
1582 h = th;
1583
1584 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1585 if(i + 1 == n) /* remainder */
1586 tileresize(c, tx, y, tw - 2 * c->bw, (ty + th) - y - 2 * c->bw);
1587 else
1588 tileresize(c, tx, y, tw - 2 * c->bw, h - 2 * c->bw);
1589 if(h != th)
1590 y = c->y + c->h + 2 * c->bw;
1591 }
1592}
1593
1594void
1595togglefloating(const char *arg) {
1596 if(!sel)
1597 return;
1598 sel->isfloating = !sel->isfloating;
1599 if(sel->isfloating)
1600 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1601 arrange();
1602}
1603
1604void
1605togglelayout(const char *arg) {
1606 unsigned int i;
1607
1608 if(!arg) {
1609 if(++lt == &layouts[LENGTH(layouts)])
1610 lt = &layouts[0];
1611 }
1612 else {
1613 for(i = 0; i < LENGTH(layouts); i++)
1614 if(!strcmp(arg, layouts[i].symbol))
1615 break;
1616 if(i == LENGTH(layouts))
1617 return;
1618 lt = &layouts[i];
1619 }
1620 if(sel)
1621 arrange();
1622 else
1623 drawbar();
1624}
1625
1626void
1627toggletag(const char *arg) {
1628 unsigned int i, j;
1629
1630 if(!sel)
1631 return;
1632 i = idxoftag(arg);
1633 sel->tags[i] = !sel->tags[i];
1634 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1635 if(j == LENGTH(tags))
1636 sel->tags[i] = True; /* at least one tag must be enabled */
1637 arrange();
1638}
1639
1640void
1641toggleview(const char *arg) {
1642 unsigned int i, j;
1643
1644 i = idxoftag(arg);
1645 tagset[seltags][i] = !tagset[seltags][i];
1646 for(j = 0; j < LENGTH(tags) && !tagset[seltags][j]; j++);
1647 if(j == LENGTH(tags))
1648 tagset[seltags][i] = True; /* at least one tag must be viewed */
1649 arrange();
1650}
1651
1652void
1653unban(Client *c) {
1654 if(!c->isbanned)
1655 return;
1656 XMoveWindow(dpy, c->win, c->x, c->y);
1657 c->isbanned = False;
1658}
1659
1660void
1661unmanage(Client *c) {
1662 XWindowChanges wc;
1663
1664 wc.border_width = c->oldbw;
1665 /* The server grab construct avoids race conditions. */
1666 XGrabServer(dpy);
1667 XSetErrorHandler(xerrordummy);
1668 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1669 detach(c);
1670 detachstack(c);
1671 if(sel == c)
1672 focus(NULL);
1673 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1674 setclientstate(c, WithdrawnState);
1675 free(c->tags);
1676 free(c);
1677 XSync(dpy, False);
1678 XSetErrorHandler(xerror);
1679 XUngrabServer(dpy);
1680 arrange();
1681}
1682
1683void
1684unmapnotify(XEvent *e) {
1685 Client *c;
1686 XUnmapEvent *ev = &e->xunmap;
1687
1688 if((c = getclient(ev->window)))
1689 unmanage(c);
1690}
1691
1692void
1693updatebar(void) {
1694 if(dc.drawable != 0)
1695 XFreePixmap(dpy, dc.drawable);
1696 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1697 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1698}
1699
1700void
1701updategeom(void) {
1702
1703 /* bar geometry */
1704 bx = 0;
1705 by = 0;
1706 bw = sw;
1707
1708 /* window area geometry */
1709 wx = sx;
1710 wy = sy + bh;
1711 ww = sw;
1712 wh = sh - bh;
1713
1714 /* master area geometry */
1715 mx = wx;
1716 my = wy;
1717 mw = mfact * ww;
1718 mh = wh;
1719
1720 /* tile area geometry */
1721 tx = mx + mw;
1722 ty = wy;
1723 tw = ww - mw;
1724 th = wh;
1725}
1726
1727void
1728updatesizehints(Client *c) {
1729 long msize;
1730 XSizeHints size;
1731
1732 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1733 size.flags = PSize;
1734 c->flags = size.flags;
1735 if(c->flags & PBaseSize) {
1736 c->basew = size.base_width;
1737 c->baseh = size.base_height;
1738 }
1739 else if(c->flags & PMinSize) {
1740 c->basew = size.min_width;
1741 c->baseh = size.min_height;
1742 }
1743 else
1744 c->basew = c->baseh = 0;
1745 if(c->flags & PResizeInc) {
1746 c->incw = size.width_inc;
1747 c->inch = size.height_inc;
1748 }
1749 else
1750 c->incw = c->inch = 0;
1751 if(c->flags & PMaxSize) {
1752 c->maxw = size.max_width;
1753 c->maxh = size.max_height;
1754 }
1755 else
1756 c->maxw = c->maxh = 0;
1757 if(c->flags & PMinSize) {
1758 c->minw = size.min_width;
1759 c->minh = size.min_height;
1760 }
1761 else if(c->flags & PBaseSize) {
1762 c->minw = size.base_width;
1763 c->minh = size.base_height;
1764 }
1765 else
1766 c->minw = c->minh = 0;
1767 if(c->flags & PAspect) {
1768 c->minax = size.min_aspect.x;
1769 c->maxax = size.max_aspect.x;
1770 c->minay = size.min_aspect.y;
1771 c->maxay = size.max_aspect.y;
1772 }
1773 else
1774 c->minax = c->maxax = c->minay = c->maxay = 0;
1775 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1776 && c->maxw == c->minw && c->maxh == c->minh);
1777}
1778
1779void
1780updatetitle(Client *c) {
1781 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1782 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1783}
1784
1785void
1786updatewmhints(Client *c) {
1787 XWMHints *wmh;
1788
1789 if((wmh = XGetWMHints(dpy, c->win))) {
1790 if(c == sel)
1791 sel->isurgent = False;
1792 else
1793 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1794 XFree(wmh);
1795 }
1796}
1797
1798void
1799view(const char *arg) {
1800 seltags ^= 1; /* toggle sel tagset */
1801 memset(tagset[seltags], (NULL == arg), TAGSZ);
1802 tagset[seltags][idxoftag(arg)] = True;
1803 arrange();
1804}
1805
1806void
1807viewprevtag(const char *arg) {
1808 seltags ^= 1; /* toggle sel tagset */
1809 arrange();
1810}
1811
1812/* There's no way to check accesses to destroyed windows, thus those cases are
1813 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1814 * default error handler, which may call exit. */
1815int
1816xerror(Display *dpy, XErrorEvent *ee) {
1817 if(ee->error_code == BadWindow
1818 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1819 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1820 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1821 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1822 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1823 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1824 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1825 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1826 return 0;
1827 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1828 ee->request_code, ee->error_code);
1829 return xerrorxlib(dpy, ee); /* may call exit */
1830}
1831
1832int
1833xerrordummy(Display *dpy, XErrorEvent *ee) {
1834 return 0;
1835}
1836
1837/* Startup Error handler to check if another window manager
1838 * is already running. */
1839int
1840xerrorstart(Display *dpy, XErrorEvent *ee) {
1841 otherwm = True;
1842 return -1;
1843}
1844
1845void
1846zoom(const char *arg) {
1847 Client *c = sel;
1848
1849 if(c == nexttiled(clients))
1850 if(!c || !(c = nexttiled(c->next)))
1851 return;
1852 if(!lt->isfloating && !sel->isfloating) {
1853 detach(c);
1854 attach(c);
1855 focus(c);
1856 }
1857 arrange();
1858}
1859
1860int
1861main(int argc, char *argv[]) {
1862 if(argc == 2 && !strcmp("-v", argv[1]))
1863 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1864 else if(argc != 1)
1865 eprint("usage: dwm [-v]\n");
1866
1867 setlocale(LC_CTYPE, "");
1868 if(!(dpy = XOpenDisplay(0)))
1869 eprint("dwm: cannot open display\n");
1870
1871 checkotherwm();
1872 setup();
1873 scan();
1874 run();
1875 cleanup();
1876
1877 XCloseDisplay(dpy);
1878 return 0;
1879}