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applied Brendan MacDonell's WM_TAKE_FOCUS patch, thanks Brendan!
[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * The event handlers of dwm are organized in an array which is accessed
10 * whenever a new event has been fetched. This allows event dispatching
11 * in O(1) time.
12 *
13 * Each child of the root window is called a client, except windows which have
14 * set the override_redirect flag. Clients are organized in a linked client
15 * list on each monitor, the focus history is remembered through a stack list
16 * on each monitor. Each client contains a bit array to indicate the tags of a
17 * client.
18 *
19 * Keys and tagging rules are organized as arrays and defined in config.h.
20 *
21 * To understand everything else, start reading main().
22 */
23 #include <errno.h>
24 #include <locale.h>
25 #include <stdarg.h>
26 #include <signal.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <sys/types.h>
32 #include <sys/wait.h>
33 #include <X11/cursorfont.h>
34 #include <X11/keysym.h>
35 #include <X11/Xatom.h>
36 #include <X11/Xlib.h>
37 #include <X11/Xproto.h>
38 #include <X11/Xutil.h>
39 #ifdef XINERAMA
40 #include <X11/extensions/Xinerama.h>
41 #endif /* XINERAMA */
42
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
47 #define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
48 #define LENGTH(X) (sizeof X / sizeof X[0])
49 #define MAX(A, B) ((A) > (B) ? (A) : (B))
50 #define MIN(A, B) ((A) < (B) ? (A) : (B))
51 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
52 #define WIDTH(X) ((X)->w + 2 * (X)->bw)
53 #define HEIGHT(X) ((X)->h + 2 * (X)->bw)
54 #define TAGMASK ((1 << LENGTH(tags)) - 1)
55 #define TEXTW(X) (textnw(X, strlen(X)) + dc.font.height)
56
57 /* enums */
58 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60 enum { NetSupported, NetWMName, NetWMState,
61 NetWMFullscreen, NetLast }; /* EWMH atoms */
62 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
63 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
64 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
65
66 typedef union {
67 int i;
68 unsigned int ui;
69 float f;
70 const void *v;
71 } Arg;
72
73 typedef struct {
74 unsigned int click;
75 unsigned int mask;
76 unsigned int button;
77 void (*func)(const Arg *arg);
78 const Arg arg;
79 } Button;
80
81 typedef struct Monitor Monitor;
82 typedef struct Client Client;
83 struct Client {
84 char name[256];
85 float mina, maxa;
86 int x, y, w, h;
87 int oldx, oldy, oldw, oldh;
88 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
89 int bw, oldbw;
90 unsigned int tags;
91 Bool isfixed, isfloating, isurgent, neverfocus, oldstate;
92 Client *next;
93 Client *snext;
94 Monitor *mon;
95 Window win;
96 };
97
98 typedef struct {
99 int x, y, w, h;
100 unsigned long norm[ColLast];
101 unsigned long sel[ColLast];
102 Drawable drawable;
103 GC gc;
104 struct {
105 int ascent;
106 int descent;
107 int height;
108 XFontSet set;
109 XFontStruct *xfont;
110 } font;
111 } DC; /* draw context */
112
113 typedef struct {
114 unsigned int mod;
115 KeySym keysym;
116 void (*func)(const Arg *);
117 const Arg arg;
118 } Key;
119
120 typedef struct {
121 const char *symbol;
122 void (*arrange)(Monitor *);
123 } Layout;
124
125 struct Monitor {
126 char ltsymbol[16];
127 float mfact;
128 int num;
129 int by; /* bar geometry */
130 int mx, my, mw, mh; /* screen size */
131 int wx, wy, ww, wh; /* window area */
132 unsigned int seltags;
133 unsigned int sellt;
134 unsigned int tagset[2];
135 Bool showbar;
136 Bool topbar;
137 Client *clients;
138 Client *sel;
139 Client *stack;
140 Monitor *next;
141 Window barwin;
142 const Layout *lt[2];
143 };
144
145 typedef struct {
146 const char *class;
147 const char *instance;
148 const char *title;
149 unsigned int tags;
150 Bool isfloating;
151 int monitor;
152 } Rule;
153
154 /* function declarations */
155 static void applyrules(Client *c);
156 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
157 static void arrange(Monitor *m);
158 static void arrangemon(Monitor *m);
159 static void attach(Client *c);
160 static void attachstack(Client *c);
161 static void buttonpress(XEvent *e);
162 static void checkotherwm(void);
163 static void cleanup(void);
164 static void cleanupmon(Monitor *mon);
165 static void clearurgent(Client *c);
166 static void clientmessage(XEvent *e);
167 static void configure(Client *c);
168 static void configurenotify(XEvent *e);
169 static void configurerequest(XEvent *e);
170 static Monitor *createmon(void);
171 static void destroynotify(XEvent *e);
172 static void detach(Client *c);
173 static void detachstack(Client *c);
174 static void die(const char *errstr, ...);
175 static Monitor *dirtomon(int dir);
176 static void drawbar(Monitor *m);
177 static void drawbars(void);
178 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
179 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
180 static void enternotify(XEvent *e);
181 static void expose(XEvent *e);
182 static void focus(Client *c);
183 static void focusin(XEvent *e);
184 static void focusmon(const Arg *arg);
185 static void focusstack(const Arg *arg);
186 static unsigned long getcolor(const char *colstr);
187 static Bool getrootptr(int *x, int *y);
188 static long getstate(Window w);
189 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
190 static void grabbuttons(Client *c, Bool focused);
191 static void grabkeys(void);
192 static void initfont(const char *fontstr);
193 static void keypress(XEvent *e);
194 static void killclient(const Arg *arg);
195 static void manage(Window w, XWindowAttributes *wa);
196 static void mappingnotify(XEvent *e);
197 static void maprequest(XEvent *e);
198 static void monocle(Monitor *m);
199 static void movemouse(const Arg *arg);
200 static Client *nexttiled(Client *c);
201 static Monitor *ptrtomon(int x, int y);
202 static void propertynotify(XEvent *e);
203 static void quit(const Arg *arg);
204 static void resize(Client *c, int x, int y, int w, int h, Bool interact);
205 static void resizeclient(Client *c, int x, int y, int w, int h);
206 static void resizemouse(const Arg *arg);
207 static void restack(Monitor *m);
208 static void run(void);
209 static void scan(void);
210 static Bool sendevent(Client *c, Atom proto);
211 static void sendmon(Client *c, Monitor *m);
212 static void setclientstate(Client *c, long state);
213 static void setfocus(Client *c);
214 static void setlayout(const Arg *arg);
215 static void setmfact(const Arg *arg);
216 static void setup(void);
217 static void showhide(Client *c);
218 static void sigchld(int unused);
219 static void spawn(const Arg *arg);
220 static void tag(const Arg *arg);
221 static void tagmon(const Arg *arg);
222 static int textnw(const char *text, unsigned int len);
223 static void tile(Monitor *);
224 static void togglebar(const Arg *arg);
225 static void togglefloating(const Arg *arg);
226 static void toggletag(const Arg *arg);
227 static void toggleview(const Arg *arg);
228 static void unfocus(Client *c, Bool setfocus);
229 static void unmanage(Client *c, Bool destroyed);
230 static void unmapnotify(XEvent *e);
231 static Bool updategeom(void);
232 static void updatebarpos(Monitor *m);
233 static void updatebars(void);
234 static void updatenumlockmask(void);
235 static void updatesizehints(Client *c);
236 static void updatestatus(void);
237 static void updatetitle(Client *c);
238 static void updatewmhints(Client *c);
239 static void view(const Arg *arg);
240 static Client *wintoclient(Window w);
241 static Monitor *wintomon(Window w);
242 static int xerror(Display *dpy, XErrorEvent *ee);
243 static int xerrordummy(Display *dpy, XErrorEvent *ee);
244 static int xerrorstart(Display *dpy, XErrorEvent *ee);
245 static void zoom(const Arg *arg);
246
247 /* variables */
248 static const char broken[] = "broken";
249 static char stext[256];
250 static int screen;
251 static int sw, sh; /* X display screen geometry width, height */
252 static int bh, blw = 0; /* bar geometry */
253 static int (*xerrorxlib)(Display *, XErrorEvent *);
254 static unsigned int numlockmask = 0;
255 static void (*handler[LASTEvent]) (XEvent *) = {
256 [ButtonPress] = buttonpress,
257 [ClientMessage] = clientmessage,
258 [ConfigureRequest] = configurerequest,
259 [ConfigureNotify] = configurenotify,
260 [DestroyNotify] = destroynotify,
261 [EnterNotify] = enternotify,
262 [Expose] = expose,
263 [FocusIn] = focusin,
264 [KeyPress] = keypress,
265 [MappingNotify] = mappingnotify,
266 [MapRequest] = maprequest,
267 [PropertyNotify] = propertynotify,
268 [UnmapNotify] = unmapnotify
269 };
270 static Atom wmatom[WMLast], netatom[NetLast];
271 static Bool running = True;
272 static Cursor cursor[CurLast];
273 static Display *dpy;
274 static DC dc;
275 static Monitor *mons = NULL, *selmon = NULL;
276 static Window root;
277
278 /* configuration, allows nested code to access above variables */
279 #include "config.h"
280
281 /* compile-time check if all tags fit into an unsigned int bit array. */
282 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
283
284 /* function implementations */
285 void
286 applyrules(Client *c) {
287 const char *class, *instance;
288 unsigned int i;
289 const Rule *r;
290 Monitor *m;
291 XClassHint ch = { 0 };
292
293 /* rule matching */
294 c->isfloating = c->tags = 0;
295 if(XGetClassHint(dpy, c->win, &ch)) {
296 class = ch.res_class ? ch.res_class : broken;
297 instance = ch.res_name ? ch.res_name : broken;
298 for(i = 0; i < LENGTH(rules); i++) {
299 r = &rules[i];
300 if((!r->title || strstr(c->name, r->title))
301 && (!r->class || strstr(class, r->class))
302 && (!r->instance || strstr(instance, r->instance)))
303 {
304 c->isfloating = r->isfloating;
305 c->tags |= r->tags;
306 for(m = mons; m && m->num != r->monitor; m = m->next);
307 if(m)
308 c->mon = m;
309 }
310 }
311 if(ch.res_class)
312 XFree(ch.res_class);
313 if(ch.res_name)
314 XFree(ch.res_name);
315 }
316 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
317 }
318
319 Bool
320 applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
321 Bool baseismin;
322 Monitor *m = c->mon;
323
324 /* set minimum possible */
325 *w = MAX(1, *w);
326 *h = MAX(1, *h);
327 if(interact) {
328 if(*x > sw)
329 *x = sw - WIDTH(c);
330 if(*y > sh)
331 *y = sh - HEIGHT(c);
332 if(*x + *w + 2 * c->bw < 0)
333 *x = 0;
334 if(*y + *h + 2 * c->bw < 0)
335 *y = 0;
336 }
337 else {
338 if(*x > m->mx + m->mw)
339 *x = m->mx + m->mw - WIDTH(c);
340 if(*y > m->my + m->mh)
341 *y = m->my + m->mh - HEIGHT(c);
342 if(*x + *w + 2 * c->bw < m->mx)
343 *x = m->mx;
344 if(*y + *h + 2 * c->bw < m->my)
345 *y = m->my;
346 }
347 if(*h < bh)
348 *h = bh;
349 if(*w < bh)
350 *w = bh;
351 if(resizehints || c->isfloating) {
352 /* see last two sentences in ICCCM 4.1.2.3 */
353 baseismin = c->basew == c->minw && c->baseh == c->minh;
354 if(!baseismin) { /* temporarily remove base dimensions */
355 *w -= c->basew;
356 *h -= c->baseh;
357 }
358 /* adjust for aspect limits */
359 if(c->mina > 0 && c->maxa > 0) {
360 if(c->maxa < (float)*w / *h)
361 *w = *h * c->maxa + 0.5;
362 else if(c->mina < (float)*h / *w)
363 *h = *w * c->mina + 0.5;
364 }
365 if(baseismin) { /* increment calculation requires this */
366 *w -= c->basew;
367 *h -= c->baseh;
368 }
369 /* adjust for increment value */
370 if(c->incw)
371 *w -= *w % c->incw;
372 if(c->inch)
373 *h -= *h % c->inch;
374 /* restore base dimensions */
375 *w = MAX(*w + c->basew, c->minw);
376 *h = MAX(*h + c->baseh, c->minh);
377 if(c->maxw)
378 *w = MIN(*w, c->maxw);
379 if(c->maxh)
380 *h = MIN(*h, c->maxh);
381 }
382 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
383 }
384
385 void
386 arrange(Monitor *m) {
387 if(m)
388 showhide(m->stack);
389 else for(m = mons; m; m = m->next)
390 showhide(m->stack);
391 focus(NULL);
392 if(m)
393 arrangemon(m);
394 else for(m = mons; m; m = m->next)
395 arrangemon(m);
396 }
397
398 void
399 arrangemon(Monitor *m) {
400 strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
401 if(m->lt[m->sellt]->arrange)
402 m->lt[m->sellt]->arrange(m);
403 restack(m);
404 }
405
406 void
407 attach(Client *c) {
408 c->next = c->mon->clients;
409 c->mon->clients = c;
410 }
411
412 void
413 attachstack(Client *c) {
414 c->snext = c->mon->stack;
415 c->mon->stack = c;
416 }
417
418 void
419 buttonpress(XEvent *e) {
420 unsigned int i, x, click;
421 Arg arg = {0};
422 Client *c;
423 Monitor *m;
424 XButtonPressedEvent *ev = &e->xbutton;
425
426 click = ClkRootWin;
427 /* focus monitor if necessary */
428 if((m = wintomon(ev->window)) && m != selmon) {
429 unfocus(selmon->sel, True);
430 selmon = m;
431 focus(NULL);
432 }
433 if(ev->window == selmon->barwin) {
434 i = x = 0;
435 do {
436 x += TEXTW(tags[i]);
437 } while(ev->x >= x && ++i < LENGTH(tags));
438 if(i < LENGTH(tags)) {
439 click = ClkTagBar;
440 arg.ui = 1 << i;
441 }
442 else if(ev->x < x + blw)
443 click = ClkLtSymbol;
444 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
445 click = ClkStatusText;
446 else
447 click = ClkWinTitle;
448 }
449 else if((c = wintoclient(ev->window))) {
450 focus(c);
451 click = ClkClientWin;
452 }
453 for(i = 0; i < LENGTH(buttons); i++)
454 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
455 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
456 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
457 }
458
459 void
460 checkotherwm(void) {
461 xerrorxlib = XSetErrorHandler(xerrorstart);
462 /* this causes an error if some other window manager is running */
463 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
464 XSync(dpy, False);
465 XSetErrorHandler(xerror);
466 XSync(dpy, False);
467 }
468
469 void
470 cleanup(void) {
471 Arg a = {.ui = ~0};
472 Layout foo = { "", NULL };
473 Monitor *m;
474
475 view(&a);
476 selmon->lt[selmon->sellt] = &foo;
477 for(m = mons; m; m = m->next)
478 while(m->stack)
479 unmanage(m->stack, False);
480 if(dc.font.set)
481 XFreeFontSet(dpy, dc.font.set);
482 else
483 XFreeFont(dpy, dc.font.xfont);
484 XUngrabKey(dpy, AnyKey, AnyModifier, root);
485 XFreePixmap(dpy, dc.drawable);
486 XFreeGC(dpy, dc.gc);
487 XFreeCursor(dpy, cursor[CurNormal]);
488 XFreeCursor(dpy, cursor[CurResize]);
489 XFreeCursor(dpy, cursor[CurMove]);
490 while(mons)
491 cleanupmon(mons);
492 XSync(dpy, False);
493 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
494 }
495
496 void
497 cleanupmon(Monitor *mon) {
498 Monitor *m;
499
500 if(mon == mons)
501 mons = mons->next;
502 else {
503 for(m = mons; m && m->next != mon; m = m->next);
504 m->next = mon->next;
505 }
506 XUnmapWindow(dpy, mon->barwin);
507 XDestroyWindow(dpy, mon->barwin);
508 free(mon);
509 }
510
511 void
512 clearurgent(Client *c) {
513 XWMHints *wmh;
514
515 c->isurgent = False;
516 if(!(wmh = XGetWMHints(dpy, c->win)))
517 return;
518 wmh->flags &= ~XUrgencyHint;
519 XSetWMHints(dpy, c->win, wmh);
520 XFree(wmh);
521 }
522
523 void
524 configure(Client *c) {
525 XConfigureEvent ce;
526
527 ce.type = ConfigureNotify;
528 ce.display = dpy;
529 ce.event = c->win;
530 ce.window = c->win;
531 ce.x = c->x;
532 ce.y = c->y;
533 ce.width = c->w;
534 ce.height = c->h;
535 ce.border_width = c->bw;
536 ce.above = None;
537 ce.override_redirect = False;
538 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
539 }
540
541 void
542 configurenotify(XEvent *e) {
543 Monitor *m;
544 XConfigureEvent *ev = &e->xconfigure;
545
546 if(ev->window == root) {
547 sw = ev->width;
548 sh = ev->height;
549 if(updategeom()) {
550 if(dc.drawable != 0)
551 XFreePixmap(dpy, dc.drawable);
552 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
553 updatebars();
554 for(m = mons; m; m = m->next)
555 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
556 arrange(NULL);
557 }
558 }
559 }
560
561 void
562 configurerequest(XEvent *e) {
563 Client *c;
564 Monitor *m;
565 XConfigureRequestEvent *ev = &e->xconfigurerequest;
566 XWindowChanges wc;
567
568 if((c = wintoclient(ev->window))) {
569 if(ev->value_mask & CWBorderWidth)
570 c->bw = ev->border_width;
571 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
572 m = c->mon;
573 if(ev->value_mask & CWX)
574 c->x = m->mx + ev->x;
575 if(ev->value_mask & CWY)
576 c->y = m->my + ev->y;
577 if(ev->value_mask & CWWidth)
578 c->w = ev->width;
579 if(ev->value_mask & CWHeight)
580 c->h = ev->height;
581 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
582 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
583 if((c->y + c->h) > m->my + m->mh && c->isfloating)
584 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
585 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
586 configure(c);
587 if(ISVISIBLE(c))
588 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
589 }
590 else
591 configure(c);
592 }
593 else {
594 wc.x = ev->x;
595 wc.y = ev->y;
596 wc.width = ev->width;
597 wc.height = ev->height;
598 wc.border_width = ev->border_width;
599 wc.sibling = ev->above;
600 wc.stack_mode = ev->detail;
601 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
602 }
603 XSync(dpy, False);
604 }
605
606 Monitor *
607 createmon(void) {
608 Monitor *m;
609
610 if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
611 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
612 m->tagset[0] = m->tagset[1] = 1;
613 m->mfact = mfact;
614 m->showbar = showbar;
615 m->topbar = topbar;
616 m->lt[0] = &layouts[0];
617 m->lt[1] = &layouts[1 % LENGTH(layouts)];
618 strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
619 return m;
620 }
621
622 void
623 destroynotify(XEvent *e) {
624 Client *c;
625 XDestroyWindowEvent *ev = &e->xdestroywindow;
626
627 if((c = wintoclient(ev->window)))
628 unmanage(c, True);
629 }
630
631 void
632 detach(Client *c) {
633 Client **tc;
634
635 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
636 *tc = c->next;
637 }
638
639 void
640 detachstack(Client *c) {
641 Client **tc, *t;
642
643 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
644 *tc = c->snext;
645
646 if(c == c->mon->sel) {
647 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
648 c->mon->sel = t;
649 }
650 }
651
652 void
653 die(const char *errstr, ...) {
654 va_list ap;
655
656 va_start(ap, errstr);
657 vfprintf(stderr, errstr, ap);
658 va_end(ap);
659 exit(EXIT_FAILURE);
660 }
661
662 Monitor *
663 dirtomon(int dir) {
664 Monitor *m = NULL;
665
666 if(dir > 0) {
667 if(!(m = selmon->next))
668 m = mons;
669 }
670 else {
671 if(selmon == mons)
672 for(m = mons; m->next; m = m->next);
673 else
674 for(m = mons; m->next != selmon; m = m->next);
675 }
676 return m;
677 }
678
679 void
680 drawbar(Monitor *m) {
681 int x;
682 unsigned int i, occ = 0, urg = 0;
683 unsigned long *col;
684 Client *c;
685
686 for(c = m->clients; c; c = c->next) {
687 occ |= c->tags;
688 if(c->isurgent)
689 urg |= c->tags;
690 }
691 dc.x = 0;
692 for(i = 0; i < LENGTH(tags); i++) {
693 dc.w = TEXTW(tags[i]);
694 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
695 drawtext(tags[i], col, urg & 1 << i);
696 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
697 occ & 1 << i, urg & 1 << i, col);
698 dc.x += dc.w;
699 }
700 dc.w = blw = TEXTW(m->ltsymbol);
701 drawtext(m->ltsymbol, dc.norm, False);
702 dc.x += dc.w;
703 x = dc.x;
704 if(m == selmon) { /* status is only drawn on selected monitor */
705 dc.w = TEXTW(stext);
706 dc.x = m->ww - dc.w;
707 if(dc.x < x) {
708 dc.x = x;
709 dc.w = m->ww - x;
710 }
711 drawtext(stext, dc.norm, False);
712 }
713 else
714 dc.x = m->ww;
715 if((dc.w = dc.x - x) > bh) {
716 dc.x = x;
717 if(m->sel) {
718 col = m == selmon ? dc.sel : dc.norm;
719 drawtext(m->sel->name, col, False);
720 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
721 }
722 else
723 drawtext(NULL, dc.norm, False);
724 }
725 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
726 XSync(dpy, False);
727 }
728
729 void
730 drawbars(void) {
731 Monitor *m;
732
733 for(m = mons; m; m = m->next)
734 drawbar(m);
735 }
736
737 void
738 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
739 int x;
740 XGCValues gcv;
741 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
742
743 gcv.foreground = col[invert ? ColBG : ColFG];
744 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
745 x = (dc.font.ascent + dc.font.descent + 2) / 4;
746 r.x = dc.x + 1;
747 r.y = dc.y + 1;
748 if(filled) {
749 r.width = r.height = x + 1;
750 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
751 }
752 else if(empty) {
753 r.width = r.height = x;
754 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
755 }
756 }
757
758 void
759 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
760 char buf[256];
761 int i, x, y, h, len, olen;
762 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
763
764 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
765 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
766 if(!text)
767 return;
768 olen = strlen(text);
769 h = dc.font.ascent + dc.font.descent;
770 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
771 x = dc.x + (h / 2);
772 /* shorten text if necessary */
773 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
774 if(!len)
775 return;
776 memcpy(buf, text, len);
777 if(len < olen)
778 for(i = len; i && i > len - 3; buf[--i] = '.');
779 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
780 if(dc.font.set)
781 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
782 else
783 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
784 }
785
786 void
787 enternotify(XEvent *e) {
788 Monitor *m;
789 XCrossingEvent *ev = &e->xcrossing;
790
791 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
792 return;
793 if((m = wintomon(ev->window)) && m != selmon) {
794 unfocus(selmon->sel, True);
795 selmon = m;
796 }
797 focus((wintoclient(ev->window)));
798 }
799
800 void
801 expose(XEvent *e) {
802 Monitor *m;
803 XExposeEvent *ev = &e->xexpose;
804
805 if(ev->count == 0 && (m = wintomon(ev->window)))
806 drawbar(m);
807 }
808
809 void
810 focus(Client *c) {
811 if(!c || !ISVISIBLE(c))
812 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
813 /* was if(selmon->sel) */
814 if(selmon->sel && selmon->sel != c)
815 unfocus(selmon->sel, False);
816 if(c) {
817 if(c->mon != selmon)
818 selmon = c->mon;
819 if(c->isurgent)
820 clearurgent(c);
821 detachstack(c);
822 attachstack(c);
823 grabbuttons(c, True);
824 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
825 setfocus(c);
826 }
827 else
828 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
829 selmon->sel = c;
830 drawbars();
831 }
832
833 void
834 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
835 XFocusChangeEvent *ev = &e->xfocus;
836
837 if(selmon->sel && ev->window != selmon->sel->win)
838 setfocus(selmon->sel);
839 }
840
841 void
842 focusmon(const Arg *arg) {
843 Monitor *m;
844
845 if(!mons->next)
846 return;
847 if((m = dirtomon(arg->i)) == selmon)
848 return;
849 unfocus(selmon->sel, True);
850 selmon = m;
851 focus(NULL);
852 }
853
854 void
855 focusstack(const Arg *arg) {
856 Client *c = NULL, *i;
857
858 if(!selmon->sel)
859 return;
860 if(arg->i > 0) {
861 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
862 if(!c)
863 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
864 }
865 else {
866 for(i = selmon->clients; i != selmon->sel; i = i->next)
867 if(ISVISIBLE(i))
868 c = i;
869 if(!c)
870 for(; i; i = i->next)
871 if(ISVISIBLE(i))
872 c = i;
873 }
874 if(c) {
875 focus(c);
876 restack(selmon);
877 }
878 }
879
880 unsigned long
881 getcolor(const char *colstr) {
882 Colormap cmap = DefaultColormap(dpy, screen);
883 XColor color;
884
885 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
886 die("error, cannot allocate color '%s'\n", colstr);
887 return color.pixel;
888 }
889
890 Bool
891 getrootptr(int *x, int *y) {
892 int di;
893 unsigned int dui;
894 Window dummy;
895
896 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
897 }
898
899 long
900 getstate(Window w) {
901 int format;
902 long result = -1;
903 unsigned char *p = NULL;
904 unsigned long n, extra;
905 Atom real;
906
907 if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
908 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
909 return -1;
910 if(n != 0)
911 result = *p;
912 XFree(p);
913 return result;
914 }
915
916 Bool
917 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
918 char **list = NULL;
919 int n;
920 XTextProperty name;
921
922 if(!text || size == 0)
923 return False;
924 text[0] = '\0';
925 XGetTextProperty(dpy, w, &name, atom);
926 if(!name.nitems)
927 return False;
928 if(name.encoding == XA_STRING)
929 strncpy(text, (char *)name.value, size - 1);
930 else {
931 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
932 strncpy(text, *list, size - 1);
933 XFreeStringList(list);
934 }
935 }
936 text[size - 1] = '\0';
937 XFree(name.value);
938 return True;
939 }
940
941 void
942 grabbuttons(Client *c, Bool focused) {
943 updatenumlockmask();
944 {
945 unsigned int i, j;
946 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
947 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
948 if(focused) {
949 for(i = 0; i < LENGTH(buttons); i++)
950 if(buttons[i].click == ClkClientWin)
951 for(j = 0; j < LENGTH(modifiers); j++)
952 XGrabButton(dpy, buttons[i].button,
953 buttons[i].mask | modifiers[j],
954 c->win, False, BUTTONMASK,
955 GrabModeAsync, GrabModeSync, None, None);
956 }
957 else
958 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
959 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
960 }
961 }
962
963 void
964 grabkeys(void) {
965 updatenumlockmask();
966 {
967 unsigned int i, j;
968 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
969 KeyCode code;
970
971 XUngrabKey(dpy, AnyKey, AnyModifier, root);
972 for(i = 0; i < LENGTH(keys); i++) {
973 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
974 for(j = 0; j < LENGTH(modifiers); j++)
975 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
976 True, GrabModeAsync, GrabModeAsync);
977 }
978 }
979 }
980
981 void
982 initfont(const char *fontstr) {
983 char *def, **missing;
984 int n;
985
986 missing = NULL;
987 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
988 if(missing) {
989 while(n--)
990 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
991 XFreeStringList(missing);
992 }
993 if(dc.font.set) {
994 XFontStruct **xfonts;
995 char **font_names;
996
997 dc.font.ascent = dc.font.descent = 0;
998 XExtentsOfFontSet(dc.font.set);
999 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
1000 while(n--) {
1001 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
1002 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
1003 xfonts++;
1004 }
1005 }
1006 else {
1007 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
1008 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
1009 die("error, cannot load font: '%s'\n", fontstr);
1010 dc.font.ascent = dc.font.xfont->ascent;
1011 dc.font.descent = dc.font.xfont->descent;
1012 }
1013 dc.font.height = dc.font.ascent + dc.font.descent;
1014 }
1015
1016 #ifdef XINERAMA
1017 static Bool
1018 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1019 while(n--)
1020 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1021 && unique[n].width == info->width && unique[n].height == info->height)
1022 return False;
1023 return True;
1024 }
1025 #endif /* XINERAMA */
1026
1027 void
1028 keypress(XEvent *e) {
1029 unsigned int i;
1030 KeySym keysym;
1031 XKeyEvent *ev;
1032
1033 ev = &e->xkey;
1034 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1035 for(i = 0; i < LENGTH(keys); i++)
1036 if(keysym == keys[i].keysym
1037 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1038 && keys[i].func)
1039 keys[i].func(&(keys[i].arg));
1040 }
1041
1042 void
1043 killclient(const Arg *arg) {
1044 if(!selmon->sel)
1045 return;
1046 if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1047 XGrabServer(dpy);
1048 XSetErrorHandler(xerrordummy);
1049 XSetCloseDownMode(dpy, DestroyAll);
1050 XKillClient(dpy, selmon->sel->win);
1051 XSync(dpy, False);
1052 XSetErrorHandler(xerror);
1053 XUngrabServer(dpy);
1054 }
1055 }
1056
1057 void
1058 manage(Window w, XWindowAttributes *wa) {
1059 Client *c, *t = NULL;
1060 Window trans = None;
1061 XWindowChanges wc;
1062
1063 if(!(c = calloc(1, sizeof(Client))))
1064 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1065 c->win = w;
1066 updatetitle(c);
1067 if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1068 c->mon = t->mon;
1069 c->tags = t->tags;
1070 }
1071 else {
1072 c->mon = selmon;
1073 applyrules(c);
1074 }
1075 /* geometry */
1076 c->x = c->oldx = wa->x + c->mon->wx;
1077 c->y = c->oldy = wa->y + c->mon->wy;
1078 c->w = c->oldw = wa->width;
1079 c->h = c->oldh = wa->height;
1080 c->oldbw = wa->border_width;
1081 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1082 c->isfloating = True;
1083 c->x = c->mon->mx;
1084 c->y = c->mon->my;
1085 c->bw = 0;
1086 }
1087 else {
1088 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1089 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1090 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1091 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1092 c->x = MAX(c->x, c->mon->mx);
1093 /* only fix client y-offset, if the client center might cover the bar */
1094 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1095 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1096 c->bw = borderpx;
1097 }
1098 wc.border_width = c->bw;
1099 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1100 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1101 configure(c); /* propagates border_width, if size doesn't change */
1102 updatesizehints(c);
1103 updatewmhints(c);
1104 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1105 grabbuttons(c, False);
1106 if(!c->isfloating)
1107 c->isfloating = c->oldstate = trans != None || c->isfixed;
1108 if(c->isfloating)
1109 XRaiseWindow(dpy, c->win);
1110 attach(c);
1111 attachstack(c);
1112 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1113 XMapWindow(dpy, c->win);
1114 setclientstate(c, NormalState);
1115 arrange(c->mon);
1116 }
1117
1118 void
1119 mappingnotify(XEvent *e) {
1120 XMappingEvent *ev = &e->xmapping;
1121
1122 XRefreshKeyboardMapping(ev);
1123 if(ev->request == MappingKeyboard)
1124 grabkeys();
1125 }
1126
1127 void
1128 maprequest(XEvent *e) {
1129 static XWindowAttributes wa;
1130 XMapRequestEvent *ev = &e->xmaprequest;
1131
1132 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1133 return;
1134 if(wa.override_redirect)
1135 return;
1136 if(!wintoclient(ev->window))
1137 manage(ev->window, &wa);
1138 }
1139
1140 void
1141 monocle(Monitor *m) {
1142 unsigned int n = 0;
1143 Client *c;
1144
1145 for(c = m->clients; c; c = c->next)
1146 if(ISVISIBLE(c))
1147 n++;
1148 if(n > 0) /* override layout symbol */
1149 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1150 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1151 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1152 }
1153
1154 void
1155 movemouse(const Arg *arg) {
1156 int x, y, ocx, ocy, nx, ny;
1157 Client *c;
1158 Monitor *m;
1159 XEvent ev;
1160
1161 if(!(c = selmon->sel))
1162 return;
1163 restack(selmon);
1164 ocx = c->x;
1165 ocy = c->y;
1166 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1167 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1168 return;
1169 if(!getrootptr(&x, &y))
1170 return;
1171 do {
1172 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1173 switch (ev.type) {
1174 case ConfigureRequest:
1175 case Expose:
1176 case MapRequest:
1177 handler[ev.type](&ev);
1178 break;
1179 case MotionNotify:
1180 nx = ocx + (ev.xmotion.x - x);
1181 ny = ocy + (ev.xmotion.y - y);
1182 if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1183 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1184 if(abs(selmon->wx - nx) < snap)
1185 nx = selmon->wx;
1186 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1187 nx = selmon->wx + selmon->ww - WIDTH(c);
1188 if(abs(selmon->wy - ny) < snap)
1189 ny = selmon->wy;
1190 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1191 ny = selmon->wy + selmon->wh - HEIGHT(c);
1192 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1193 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1194 togglefloating(NULL);
1195 }
1196 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1197 resize(c, nx, ny, c->w, c->h, True);
1198 break;
1199 }
1200 } while(ev.type != ButtonRelease);
1201 XUngrabPointer(dpy, CurrentTime);
1202 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1203 sendmon(c, m);
1204 selmon = m;
1205 focus(NULL);
1206 }
1207 }
1208
1209 Client *
1210 nexttiled(Client *c) {
1211 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1212 return c;
1213 }
1214
1215 Monitor *
1216 ptrtomon(int x, int y) {
1217 Monitor *m;
1218
1219 for(m = mons; m; m = m->next)
1220 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1221 return m;
1222 return selmon;
1223 }
1224
1225 void
1226 propertynotify(XEvent *e) {
1227 Client *c;
1228 Window trans;
1229 XPropertyEvent *ev = &e->xproperty;
1230
1231 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1232 updatestatus();
1233 else if(ev->state == PropertyDelete)
1234 return; /* ignore */
1235 else if((c = wintoclient(ev->window))) {
1236 switch (ev->atom) {
1237 default: break;
1238 case XA_WM_TRANSIENT_FOR:
1239 if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1240 (c->isfloating = (wintoclient(trans)) != NULL))
1241 arrange(c->mon);
1242 break;
1243 case XA_WM_NORMAL_HINTS:
1244 updatesizehints(c);
1245 break;
1246 case XA_WM_HINTS:
1247 updatewmhints(c);
1248 drawbars();
1249 break;
1250 }
1251 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1252 updatetitle(c);
1253 if(c == c->mon->sel)
1254 drawbar(c->mon);
1255 }
1256 }
1257 }
1258
1259 void
1260 clientmessage(XEvent *e) {
1261 XClientMessageEvent *cme = &e->xclient;
1262 Client *c;
1263
1264 if((c = wintoclient(cme->window))
1265 && (cme->message_type == netatom[NetWMState] && cme->data.l[1] == netatom[NetWMFullscreen]))
1266 {
1267 if(cme->data.l[0]) {
1268 XChangeProperty(dpy, cme->window, netatom[NetWMState], XA_ATOM, 32,
1269 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1270 c->oldstate = c->isfloating;
1271 c->oldbw = c->bw;
1272 c->bw = 0;
1273 c->isfloating = True;
1274 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1275 XRaiseWindow(dpy, c->win);
1276 }
1277 else {
1278 XChangeProperty(dpy, cme->window, netatom[NetWMState], XA_ATOM, 32,
1279 PropModeReplace, (unsigned char*)0, 0);
1280 c->isfloating = c->oldstate;
1281 c->bw = c->oldbw;
1282 c->x = c->oldx;
1283 c->y = c->oldy;
1284 c->w = c->oldw;
1285 c->h = c->oldh;
1286 resizeclient(c, c->x, c->y, c->w, c->h);
1287 arrange(c->mon);
1288 }
1289 }
1290 }
1291
1292 void
1293 quit(const Arg *arg) {
1294 running = False;
1295 }
1296
1297 void
1298 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1299 if(applysizehints(c, &x, &y, &w, &h, interact))
1300 resizeclient(c, x, y, w, h);
1301 }
1302
1303 void
1304 resizeclient(Client *c, int x, int y, int w, int h) {
1305 XWindowChanges wc;
1306
1307 c->oldx = c->x; c->x = wc.x = x;
1308 c->oldy = c->y; c->y = wc.y = y;
1309 c->oldw = c->w; c->w = wc.width = w;
1310 c->oldh = c->h; c->h = wc.height = h;
1311 wc.border_width = c->bw;
1312 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1313 configure(c);
1314 XSync(dpy, False);
1315 }
1316
1317 void
1318 resizemouse(const Arg *arg) {
1319 int ocx, ocy;
1320 int nw, nh;
1321 Client *c;
1322 Monitor *m;
1323 XEvent ev;
1324
1325 if(!(c = selmon->sel))
1326 return;
1327 restack(selmon);
1328 ocx = c->x;
1329 ocy = c->y;
1330 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1331 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1332 return;
1333 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1334 do {
1335 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1336 switch(ev.type) {
1337 case ConfigureRequest:
1338 case Expose:
1339 case MapRequest:
1340 handler[ev.type](&ev);
1341 break;
1342 case MotionNotify:
1343 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1344 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1345 if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1346 && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1347 {
1348 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1349 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1350 togglefloating(NULL);
1351 }
1352 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1353 resize(c, c->x, c->y, nw, nh, True);
1354 break;
1355 }
1356 } while(ev.type != ButtonRelease);
1357 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1358 XUngrabPointer(dpy, CurrentTime);
1359 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1360 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1361 sendmon(c, m);
1362 selmon = m;
1363 focus(NULL);
1364 }
1365 }
1366
1367 void
1368 restack(Monitor *m) {
1369 Client *c;
1370 XEvent ev;
1371 XWindowChanges wc;
1372
1373 drawbar(m);
1374 if(!m->sel)
1375 return;
1376 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1377 XRaiseWindow(dpy, m->sel->win);
1378 if(m->lt[m->sellt]->arrange) {
1379 wc.stack_mode = Below;
1380 wc.sibling = m->barwin;
1381 for(c = m->stack; c; c = c->snext)
1382 if(!c->isfloating && ISVISIBLE(c)) {
1383 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1384 wc.sibling = c->win;
1385 }
1386 }
1387 XSync(dpy, False);
1388 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1389 }
1390
1391 void
1392 run(void) {
1393 XEvent ev;
1394 /* main event loop */
1395 XSync(dpy, False);
1396 while(running && !XNextEvent(dpy, &ev)) {
1397 if(handler[ev.type])
1398 handler[ev.type](&ev); /* call handler */
1399 }
1400 }
1401
1402 void
1403 scan(void) {
1404 unsigned int i, num;
1405 Window d1, d2, *wins = NULL;
1406 XWindowAttributes wa;
1407
1408 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1409 for(i = 0; i < num; i++) {
1410 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1411 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1412 continue;
1413 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1414 manage(wins[i], &wa);
1415 }
1416 for(i = 0; i < num; i++) { /* now the transients */
1417 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1418 continue;
1419 if(XGetTransientForHint(dpy, wins[i], &d1)
1420 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1421 manage(wins[i], &wa);
1422 }
1423 if(wins)
1424 XFree(wins);
1425 }
1426 }
1427
1428 void
1429 sendmon(Client *c, Monitor *m) {
1430 if(c->mon == m)
1431 return;
1432 unfocus(c, True);
1433 detach(c);
1434 detachstack(c);
1435 c->mon = m;
1436 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1437 attach(c);
1438 attachstack(c);
1439 focus(NULL);
1440 arrange(NULL);
1441 }
1442
1443 void
1444 setclientstate(Client *c, long state) {
1445 long data[] = { state, None };
1446
1447 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1448 PropModeReplace, (unsigned char *)data, 2);
1449 }
1450
1451 Bool
1452 sendevent(Client *c, Atom proto) {
1453 int n;
1454 Atom *protocols;
1455 Bool exists = False;
1456 XEvent ev;
1457
1458 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1459 while(!exists && n--)
1460 exists = protocols[n] == proto;
1461 XFree(protocols);
1462 }
1463 if (exists) {
1464 ev.type = ClientMessage;
1465 ev.xclient.window = c->win;
1466 ev.xclient.message_type = wmatom[WMProtocols];
1467 ev.xclient.format = 32;
1468 ev.xclient.data.l[0] = proto;
1469 ev.xclient.data.l[1] = CurrentTime;
1470 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1471 }
1472 return exists;
1473 }
1474
1475 void
1476 setfocus(Client *c) {
1477 if (!c->neverfocus)
1478 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1479 sendevent(c, wmatom[WMTakeFocus]);
1480 }
1481
1482 void
1483 setlayout(const Arg *arg) {
1484 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1485 selmon->sellt ^= 1;
1486 if(arg && arg->v)
1487 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1488 strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1489 if(selmon->sel)
1490 arrange(selmon);
1491 else
1492 drawbar(selmon);
1493 }
1494
1495 /* arg > 1.0 will set mfact absolutly */
1496 void
1497 setmfact(const Arg *arg) {
1498 float f;
1499
1500 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1501 return;
1502 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1503 if(f < 0.1 || f > 0.9)
1504 return;
1505 selmon->mfact = f;
1506 arrange(selmon);
1507 }
1508
1509 void
1510 setup(void) {
1511 XSetWindowAttributes wa;
1512
1513 /* clean up any zombies immediately */
1514 sigchld(0);
1515
1516 /* init screen */
1517 screen = DefaultScreen(dpy);
1518 root = RootWindow(dpy, screen);
1519 initfont(font);
1520 sw = DisplayWidth(dpy, screen);
1521 sh = DisplayHeight(dpy, screen);
1522 bh = dc.h = dc.font.height + 2;
1523 updategeom();
1524 /* init atoms */
1525 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1526 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1527 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1528 wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1529 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1530 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1531 netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1532 netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1533 /* init cursors */
1534 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1535 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1536 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1537 /* init appearance */
1538 dc.norm[ColBorder] = getcolor(normbordercolor);
1539 dc.norm[ColBG] = getcolor(normbgcolor);
1540 dc.norm[ColFG] = getcolor(normfgcolor);
1541 dc.sel[ColBorder] = getcolor(selbordercolor);
1542 dc.sel[ColBG] = getcolor(selbgcolor);
1543 dc.sel[ColFG] = getcolor(selfgcolor);
1544 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1545 dc.gc = XCreateGC(dpy, root, 0, NULL);
1546 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1547 if(!dc.font.set)
1548 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1549 /* init bars */
1550 updatebars();
1551 updatestatus();
1552 /* EWMH support per view */
1553 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1554 PropModeReplace, (unsigned char *) netatom, NetLast);
1555 /* select for events */
1556 wa.cursor = cursor[CurNormal];
1557 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1558 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1559 |PropertyChangeMask;
1560 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1561 XSelectInput(dpy, root, wa.event_mask);
1562 grabkeys();
1563 }
1564
1565 void
1566 showhide(Client *c) {
1567 if(!c)
1568 return;
1569 if(ISVISIBLE(c)) { /* show clients top down */
1570 XMoveWindow(dpy, c->win, c->x, c->y);
1571 if(!c->mon->lt[c->mon->sellt]->arrange || c->isfloating)
1572 resize(c, c->x, c->y, c->w, c->h, False);
1573 showhide(c->snext);
1574 }
1575 else { /* hide clients bottom up */
1576 showhide(c->snext);
1577 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1578 }
1579 }
1580
1581 void
1582 sigchld(int unused) {
1583 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1584 die("Can't install SIGCHLD handler");
1585 while(0 < waitpid(-1, NULL, WNOHANG));
1586 }
1587
1588 void
1589 spawn(const Arg *arg) {
1590 if(fork() == 0) {
1591 if(dpy)
1592 close(ConnectionNumber(dpy));
1593 setsid();
1594 execvp(((char **)arg->v)[0], (char **)arg->v);
1595 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1596 perror(" failed");
1597 exit(0);
1598 }
1599 }
1600
1601 void
1602 tag(const Arg *arg) {
1603 if(selmon->sel && arg->ui & TAGMASK) {
1604 selmon->sel->tags = arg->ui & TAGMASK;
1605 arrange(selmon);
1606 }
1607 }
1608
1609 void
1610 tagmon(const Arg *arg) {
1611 if(!selmon->sel || !mons->next)
1612 return;
1613 sendmon(selmon->sel, dirtomon(arg->i));
1614 }
1615
1616 int
1617 textnw(const char *text, unsigned int len) {
1618 XRectangle r;
1619
1620 if(dc.font.set) {
1621 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1622 return r.width;
1623 }
1624 return XTextWidth(dc.font.xfont, text, len);
1625 }
1626
1627 void
1628 tile(Monitor *m) {
1629 int x, y, h, w, mw;
1630 unsigned int i, n;
1631 Client *c;
1632
1633 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1634 if(n == 0)
1635 return;
1636 /* master */
1637 c = nexttiled(m->clients);
1638 mw = m->mfact * m->ww;
1639 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1640 if(--n == 0)
1641 return;
1642 /* tile stack */
1643 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1644 y = m->wy;
1645 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1646 h = m->wh / n;
1647 if(h < bh)
1648 h = m->wh;
1649 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1650 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1651 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1652 if(h != m->wh)
1653 y = c->y + HEIGHT(c);
1654 }
1655 }
1656
1657 void
1658 togglebar(const Arg *arg) {
1659 selmon->showbar = !selmon->showbar;
1660 updatebarpos(selmon);
1661 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1662 arrange(selmon);
1663 }
1664
1665 void
1666 togglefloating(const Arg *arg) {
1667 if(!selmon->sel)
1668 return;
1669 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1670 if(selmon->sel->isfloating)
1671 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1672 selmon->sel->w, selmon->sel->h, False);
1673 arrange(selmon);
1674 }
1675
1676 void
1677 toggletag(const Arg *arg) {
1678 unsigned int newtags;
1679
1680 if(!selmon->sel)
1681 return;
1682 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1683 if(newtags) {
1684 selmon->sel->tags = newtags;
1685 arrange(selmon);
1686 }
1687 }
1688
1689 void
1690 toggleview(const Arg *arg) {
1691 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1692
1693 if(newtagset) {
1694 selmon->tagset[selmon->seltags] = newtagset;
1695 arrange(selmon);
1696 }
1697 }
1698
1699 void
1700 unfocus(Client *c, Bool setfocus) {
1701 if(!c)
1702 return;
1703 grabbuttons(c, False);
1704 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1705 if(setfocus)
1706 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1707 }
1708
1709 void
1710 unmanage(Client *c, Bool destroyed) {
1711 Monitor *m = c->mon;
1712 XWindowChanges wc;
1713
1714 /* The server grab construct avoids race conditions. */
1715 detach(c);
1716 detachstack(c);
1717 if(!destroyed) {
1718 wc.border_width = c->oldbw;
1719 XGrabServer(dpy);
1720 XSetErrorHandler(xerrordummy);
1721 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1722 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1723 setclientstate(c, WithdrawnState);
1724 XSync(dpy, False);
1725 XSetErrorHandler(xerror);
1726 XUngrabServer(dpy);
1727 }
1728 free(c);
1729 focus(NULL);
1730 arrange(m);
1731 }
1732
1733 void
1734 unmapnotify(XEvent *e) {
1735 Client *c;
1736 XUnmapEvent *ev = &e->xunmap;
1737
1738 if((c = wintoclient(ev->window)))
1739 unmanage(c, False);
1740 }
1741
1742 void
1743 updatebars(void) {
1744 Monitor *m;
1745 XSetWindowAttributes wa;
1746
1747 wa.override_redirect = True;
1748 wa.background_pixmap = ParentRelative;
1749 wa.event_mask = ButtonPressMask|ExposureMask;
1750 for(m = mons; m; m = m->next) {
1751 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1752 CopyFromParent, DefaultVisual(dpy, screen),
1753 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1754 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1755 XMapRaised(dpy, m->barwin);
1756 }
1757 }
1758
1759 void
1760 updatebarpos(Monitor *m) {
1761 m->wy = m->my;
1762 m->wh = m->mh;
1763 if(m->showbar) {
1764 m->wh -= bh;
1765 m->by = m->topbar ? m->wy : m->wy + m->wh;
1766 m->wy = m->topbar ? m->wy + bh : m->wy;
1767 }
1768 else
1769 m->by = -bh;
1770 }
1771
1772 Bool
1773 updategeom(void) {
1774 Bool dirty = False;
1775
1776 #ifdef XINERAMA
1777 if(XineramaIsActive(dpy)) {
1778 int i, j, n, nn;
1779 Client *c;
1780 Monitor *m;
1781 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1782 XineramaScreenInfo *unique = NULL;
1783
1784 for(n = 0, m = mons; m; m = m->next, n++);
1785 /* only consider unique geometries as separate screens */
1786 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
1787 die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
1788 for(i = 0, j = 0; i < nn; i++)
1789 if(isuniquegeom(unique, j, &info[i]))
1790 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1791 XFree(info);
1792 nn = j;
1793 if(n <= nn) {
1794 for(i = 0; i < (nn - n); i++) { /* new monitors available */
1795 for(m = mons; m && m->next; m = m->next);
1796 if(m)
1797 m->next = createmon();
1798 else
1799 mons = createmon();
1800 }
1801 for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1802 if(i >= n
1803 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1804 || unique[i].width != m->mw || unique[i].height != m->mh))
1805 {
1806 dirty = True;
1807 m->num = i;
1808 m->mx = m->wx = unique[i].x_org;
1809 m->my = m->wy = unique[i].y_org;
1810 m->mw = m->ww = unique[i].width;
1811 m->mh = m->wh = unique[i].height;
1812 updatebarpos(m);
1813 }
1814 }
1815 else { /* less monitors available nn < n */
1816 for(i = nn; i < n; i++) {
1817 for(m = mons; m && m->next; m = m->next);
1818 while(m->clients) {
1819 dirty = True;
1820 c = m->clients;
1821 m->clients = c->next;
1822 detachstack(c);
1823 c->mon = mons;
1824 attach(c);
1825 attachstack(c);
1826 }
1827 if(m == selmon)
1828 selmon = mons;
1829 cleanupmon(m);
1830 }
1831 }
1832 free(unique);
1833 }
1834 else
1835 #endif /* XINERAMA */
1836 /* default monitor setup */
1837 {
1838 if(!mons)
1839 mons = createmon();
1840 if(mons->mw != sw || mons->mh != sh) {
1841 dirty = True;
1842 mons->mw = mons->ww = sw;
1843 mons->mh = mons->wh = sh;
1844 updatebarpos(mons);
1845 }
1846 }
1847 if(dirty) {
1848 selmon = mons;
1849 selmon = wintomon(root);
1850 }
1851 return dirty;
1852 }
1853
1854 void
1855 updatenumlockmask(void) {
1856 unsigned int i, j;
1857 XModifierKeymap *modmap;
1858
1859 numlockmask = 0;
1860 modmap = XGetModifierMapping(dpy);
1861 for(i = 0; i < 8; i++)
1862 for(j = 0; j < modmap->max_keypermod; j++)
1863 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1864 == XKeysymToKeycode(dpy, XK_Num_Lock))
1865 numlockmask = (1 << i);
1866 XFreeModifiermap(modmap);
1867 }
1868
1869 void
1870 updatesizehints(Client *c) {
1871 long msize;
1872 XSizeHints size;
1873
1874 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1875 /* size is uninitialized, ensure that size.flags aren't used */
1876 size.flags = PSize;
1877 if(size.flags & PBaseSize) {
1878 c->basew = size.base_width;
1879 c->baseh = size.base_height;
1880 }
1881 else if(size.flags & PMinSize) {
1882 c->basew = size.min_width;
1883 c->baseh = size.min_height;
1884 }
1885 else
1886 c->basew = c->baseh = 0;
1887 if(size.flags & PResizeInc) {
1888 c->incw = size.width_inc;
1889 c->inch = size.height_inc;
1890 }
1891 else
1892 c->incw = c->inch = 0;
1893 if(size.flags & PMaxSize) {
1894 c->maxw = size.max_width;
1895 c->maxh = size.max_height;
1896 }
1897 else
1898 c->maxw = c->maxh = 0;
1899 if(size.flags & PMinSize) {
1900 c->minw = size.min_width;
1901 c->minh = size.min_height;
1902 }
1903 else if(size.flags & PBaseSize) {
1904 c->minw = size.base_width;
1905 c->minh = size.base_height;
1906 }
1907 else
1908 c->minw = c->minh = 0;
1909 if(size.flags & PAspect) {
1910 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1911 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1912 }
1913 else
1914 c->maxa = c->mina = 0.0;
1915 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1916 && c->maxw == c->minw && c->maxh == c->minh);
1917 }
1918
1919 void
1920 updatetitle(Client *c) {
1921 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1922 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1923 if(c->name[0] == '\0') /* hack to mark broken clients */
1924 strcpy(c->name, broken);
1925 }
1926
1927 void
1928 updatestatus(void) {
1929 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1930 strcpy(stext, "dwm-"VERSION);
1931 drawbar(selmon);
1932 }
1933
1934 void
1935 updatewmhints(Client *c) {
1936 XWMHints *wmh;
1937
1938 if((wmh = XGetWMHints(dpy, c->win))) {
1939 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1940 wmh->flags &= ~XUrgencyHint;
1941 XSetWMHints(dpy, c->win, wmh);
1942 }
1943 else
1944 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1945 if (wmh->flags & InputHint) c->neverfocus = !wmh->input;
1946 else c->neverfocus = False;
1947 XFree(wmh);
1948 }
1949 }
1950
1951 void
1952 view(const Arg *arg) {
1953 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1954 return;
1955 selmon->seltags ^= 1; /* toggle sel tagset */
1956 if(arg->ui & TAGMASK)
1957 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1958 arrange(selmon);
1959 }
1960
1961 Client *
1962 wintoclient(Window w) {
1963 Client *c;
1964 Monitor *m;
1965
1966 for(m = mons; m; m = m->next)
1967 for(c = m->clients; c; c = c->next)
1968 if(c->win == w)
1969 return c;
1970 return NULL;
1971 }
1972
1973 Monitor *
1974 wintomon(Window w) {
1975 int x, y;
1976 Client *c;
1977 Monitor *m;
1978
1979 if(w == root && getrootptr(&x, &y))
1980 return ptrtomon(x, y);
1981 for(m = mons; m; m = m->next)
1982 if(w == m->barwin)
1983 return m;
1984 if((c = wintoclient(w)))
1985 return c->mon;
1986 return selmon;
1987 }
1988
1989 /* There's no way to check accesses to destroyed windows, thus those cases are
1990 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1991 * default error handler, which may call exit. */
1992 int
1993 xerror(Display *dpy, XErrorEvent *ee) {
1994 if(ee->error_code == BadWindow
1995 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1996 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1997 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1998 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1999 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2000 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2001 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2002 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2003 return 0;
2004 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2005 ee->request_code, ee->error_code);
2006 return xerrorxlib(dpy, ee); /* may call exit */
2007 }
2008
2009 int
2010 xerrordummy(Display *dpy, XErrorEvent *ee) {
2011 return 0;
2012 }
2013
2014 /* Startup Error handler to check if another window manager
2015 * is already running. */
2016 int
2017 xerrorstart(Display *dpy, XErrorEvent *ee) {
2018 die("dwm: another window manager is already running\n");
2019 return -1;
2020 }
2021
2022 void
2023 zoom(const Arg *arg) {
2024 Client *c = selmon->sel;
2025
2026 if(!selmon->lt[selmon->sellt]->arrange
2027 || selmon->lt[selmon->sellt]->arrange == monocle
2028 || (selmon->sel && selmon->sel->isfloating))
2029 return;
2030 if(c == nexttiled(selmon->clients))
2031 if(!c || !(c = nexttiled(c->next)))
2032 return;
2033 detach(c);
2034 attach(c);
2035 focus(c);
2036 arrange(c->mon);
2037 }
2038
2039 int
2040 main(int argc, char *argv[]) {
2041 if(argc == 2 && !strcmp("-v", argv[1]))
2042 die("dwm-"VERSION", © 2006-2010 dwm engineers, see LICENSE for details\n");
2043 else if(argc != 1)
2044 die("usage: dwm [-v]\n");
2045 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2046 fputs("warning: no locale support\n", stderr);
2047 if(!(dpy = XOpenDisplay(NULL)))
2048 die("dwm: cannot open display\n");
2049 checkotherwm();
2050 setup();
2051 scan();
2052 run();
2053 cleanup();
2054 XCloseDisplay(dpy);
2055 return 0;
2056 }