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[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, 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, 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 Bool isprotodel(Client *c);
194 static void keypress(XEvent *e);
195 static void killclient(const Arg *arg);
196 static void manage(Window w, XWindowAttributes *wa);
197 static void mappingnotify(XEvent *e);
198 static void maprequest(XEvent *e);
199 static void monocle(Monitor *m);
200 static void movemouse(const Arg *arg);
201 static Client *nexttiled(Client *c);
202 static Monitor *ptrtomon(int x, int y);
203 static void propertynotify(XEvent *e);
204 static void quit(const Arg *arg);
205 static void resize(Client *c, int x, int y, int w, int h, Bool interact);
206 static void resizeclient(Client *c, int x, int y, int w, int h);
207 static void resizemouse(const Arg *arg);
208 static void restack(Monitor *m);
209 static void run(void);
210 static void scan(void);
211 static void sendmon(Client *c, Monitor *m);
212 static void setclientstate(Client *c, long state);
213 static void setlayout(const Arg *arg);
214 static void setmfact(const Arg *arg);
215 static void setup(void);
216 static void showhide(Client *c);
217 static void sigchld(int unused);
218 static void spawn(const Arg *arg);
219 static void tag(const Arg *arg);
220 static void tagmon(const Arg *arg);
221 static int textnw(const char *text, unsigned int len);
222 static void tile(Monitor *);
223 static void togglebar(const Arg *arg);
224 static void togglefloating(const Arg *arg);
225 static void toggletag(const Arg *arg);
226 static void toggleview(const Arg *arg);
227 static void unfocus(Client *c, Bool setfocus);
228 static void unmanage(Client *c, Bool destroyed);
229 static void unmapnotify(XEvent *e);
230 static Bool updategeom(void);
231 static void updatebarpos(Monitor *m);
232 static void updatebars(void);
233 static void updatenumlockmask(void);
234 static void updatesizehints(Client *c);
235 static void updatestatus(void);
236 static void updatetitle(Client *c);
237 static void updatewmhints(Client *c);
238 static void view(const Arg *arg);
239 static Client *wintoclient(Window w);
240 static Monitor *wintomon(Window w);
241 static int xerror(Display *dpy, XErrorEvent *ee);
242 static int xerrordummy(Display *dpy, XErrorEvent *ee);
243 static int xerrorstart(Display *dpy, XErrorEvent *ee);
244 static void zoom(const Arg *arg);
245
246 /* variables */
247 static const char broken[] = "broken";
248 static char stext[256];
249 static int screen;
250 static int sw, sh; /* X display screen geometry width, height */
251 static int bh, blw = 0; /* bar geometry */
252 static int (*xerrorxlib)(Display *, XErrorEvent *);
253 static unsigned int numlockmask = 0;
254 static void (*handler[LASTEvent]) (XEvent *) = {
255 [ButtonPress] = buttonpress,
256 [ClientMessage] = clientmessage,
257 [ConfigureRequest] = configurerequest,
258 [ConfigureNotify] = configurenotify,
259 [DestroyNotify] = destroynotify,
260 [EnterNotify] = enternotify,
261 [Expose] = expose,
262 [FocusIn] = focusin,
263 [KeyPress] = keypress,
264 [MappingNotify] = mappingnotify,
265 [MapRequest] = maprequest,
266 [PropertyNotify] = propertynotify,
267 [UnmapNotify] = unmapnotify
268 };
269 static Atom wmatom[WMLast], netatom[NetLast];
270 static Bool otherwm;
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 += c->basew;
376 *h += c->baseh;
377 *w = MAX(*w, c->minw);
378 *h = MAX(*h, c->minh);
379 if(c->maxw)
380 *w = MIN(*w, c->maxw);
381 if(c->maxh)
382 *h = MIN(*h, c->maxh);
383 }
384 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
385 }
386
387 void
388 arrange(Monitor *m) {
389 if(m)
390 showhide(m->stack);
391 else for(m = mons; m; m = m->next)
392 showhide(m->stack);
393 focus(NULL);
394 if(m)
395 arrangemon(m);
396 else for(m = mons; m; m = m->next)
397 arrangemon(m);
398 }
399
400 void
401 arrangemon(Monitor *m) {
402 strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
403 if(m->lt[m->sellt]->arrange)
404 m->lt[m->sellt]->arrange(m);
405 restack(m);
406 }
407
408 void
409 attach(Client *c) {
410 c->next = c->mon->clients;
411 c->mon->clients = c;
412 }
413
414 void
415 attachstack(Client *c) {
416 c->snext = c->mon->stack;
417 c->mon->stack = c;
418 }
419
420 void
421 buttonpress(XEvent *e) {
422 unsigned int i, x, click;
423 Arg arg = {0};
424 Client *c;
425 Monitor *m;
426 XButtonPressedEvent *ev = &e->xbutton;
427
428 click = ClkRootWin;
429 /* focus monitor if necessary */
430 if((m = wintomon(ev->window)) && m != selmon) {
431 unfocus(selmon->sel, True);
432 selmon = m;
433 focus(NULL);
434 }
435 if(ev->window == selmon->barwin) {
436 i = x = 0;
437 do {
438 x += TEXTW(tags[i]);
439 } while(ev->x >= x && ++i < LENGTH(tags));
440 if(i < LENGTH(tags)) {
441 click = ClkTagBar;
442 arg.ui = 1 << i;
443 }
444 else if(ev->x < x + blw)
445 click = ClkLtSymbol;
446 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
447 click = ClkStatusText;
448 else
449 click = ClkWinTitle;
450 }
451 else if((c = wintoclient(ev->window))) {
452 focus(c);
453 click = ClkClientWin;
454 }
455 for(i = 0; i < LENGTH(buttons); i++)
456 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
457 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
458 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
459 }
460
461 void
462 checkotherwm(void) {
463 otherwm = False;
464 xerrorxlib = XSetErrorHandler(xerrorstart);
465 /* this causes an error if some other window manager is running */
466 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
467 XSync(dpy, False);
468 if(otherwm)
469 die("dwm: another window manager is already running\n");
470 XSetErrorHandler(xerror);
471 XSync(dpy, False);
472 }
473
474 void
475 cleanup(void) {
476 Arg a = {.ui = ~0};
477 Layout foo = { "", NULL };
478 Monitor *m;
479
480 view(&a);
481 selmon->lt[selmon->sellt] = &foo;
482 for(m = mons; m; m = m->next)
483 while(m->stack)
484 unmanage(m->stack, False);
485 if(dc.font.set)
486 XFreeFontSet(dpy, dc.font.set);
487 else
488 XFreeFont(dpy, dc.font.xfont);
489 XUngrabKey(dpy, AnyKey, AnyModifier, root);
490 XFreePixmap(dpy, dc.drawable);
491 XFreeGC(dpy, dc.gc);
492 XFreeCursor(dpy, cursor[CurNormal]);
493 XFreeCursor(dpy, cursor[CurResize]);
494 XFreeCursor(dpy, cursor[CurMove]);
495 while(mons)
496 cleanupmon(mons);
497 XSync(dpy, False);
498 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
499 }
500
501 void
502 cleanupmon(Monitor *mon) {
503 Monitor *m;
504
505 if(mon == mons)
506 mons = mons->next;
507 else {
508 for(m = mons; m && m->next != mon; m = m->next);
509 m->next = mon->next;
510 }
511 XUnmapWindow(dpy, mon->barwin);
512 XDestroyWindow(dpy, mon->barwin);
513 free(mon);
514 }
515
516 void
517 clearurgent(Client *c) {
518 XWMHints *wmh;
519
520 c->isurgent = False;
521 if(!(wmh = XGetWMHints(dpy, c->win)))
522 return;
523 wmh->flags &= ~XUrgencyHint;
524 XSetWMHints(dpy, c->win, wmh);
525 XFree(wmh);
526 }
527
528 void
529 configure(Client *c) {
530 XConfigureEvent ce;
531
532 ce.type = ConfigureNotify;
533 ce.display = dpy;
534 ce.event = c->win;
535 ce.window = c->win;
536 ce.x = c->x;
537 ce.y = c->y;
538 ce.width = c->w;
539 ce.height = c->h;
540 ce.border_width = c->bw;
541 ce.above = None;
542 ce.override_redirect = False;
543 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
544 }
545
546 void
547 configurenotify(XEvent *e) {
548 Monitor *m;
549 XConfigureEvent *ev = &e->xconfigure;
550
551 if(ev->window == root) {
552 sw = ev->width;
553 sh = ev->height;
554 if(updategeom()) {
555 if(dc.drawable != 0)
556 XFreePixmap(dpy, dc.drawable);
557 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
558 updatebars();
559 for(m = mons; m; m = m->next)
560 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
561 arrange(NULL);
562 }
563 }
564 }
565
566 void
567 configurerequest(XEvent *e) {
568 Client *c;
569 Monitor *m;
570 XConfigureRequestEvent *ev = &e->xconfigurerequest;
571 XWindowChanges wc;
572
573 if((c = wintoclient(ev->window))) {
574 if(ev->value_mask & CWBorderWidth)
575 c->bw = ev->border_width;
576 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
577 m = c->mon;
578 if(ev->value_mask & CWX)
579 c->x = m->mx + ev->x;
580 if(ev->value_mask & CWY)
581 c->y = m->my + ev->y;
582 if(ev->value_mask & CWWidth)
583 c->w = ev->width;
584 if(ev->value_mask & CWHeight)
585 c->h = ev->height;
586 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
587 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
588 if((c->y + c->h) > m->my + m->mh && c->isfloating)
589 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
590 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
591 configure(c);
592 if(ISVISIBLE(c))
593 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
594 }
595 else
596 configure(c);
597 }
598 else {
599 wc.x = ev->x;
600 wc.y = ev->y;
601 wc.width = ev->width;
602 wc.height = ev->height;
603 wc.border_width = ev->border_width;
604 wc.sibling = ev->above;
605 wc.stack_mode = ev->detail;
606 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
607 }
608 XSync(dpy, False);
609 }
610
611 Monitor *
612 createmon(void) {
613 Monitor *m;
614
615 if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
616 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
617 m->tagset[0] = m->tagset[1] = 1;
618 m->mfact = mfact;
619 m->showbar = showbar;
620 m->topbar = topbar;
621 m->lt[0] = &layouts[0];
622 m->lt[1] = &layouts[1 % LENGTH(layouts)];
623 strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
624 return m;
625 }
626
627 void
628 destroynotify(XEvent *e) {
629 Client *c;
630 XDestroyWindowEvent *ev = &e->xdestroywindow;
631
632 if((c = wintoclient(ev->window)))
633 unmanage(c, True);
634 }
635
636 void
637 detach(Client *c) {
638 Client **tc;
639
640 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
641 *tc = c->next;
642 }
643
644 void
645 detachstack(Client *c) {
646 Client **tc, *t;
647
648 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
649 *tc = c->snext;
650
651 if(c == c->mon->sel) {
652 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
653 c->mon->sel = t;
654 }
655 }
656
657 void
658 die(const char *errstr, ...) {
659 va_list ap;
660
661 va_start(ap, errstr);
662 vfprintf(stderr, errstr, ap);
663 va_end(ap);
664 exit(EXIT_FAILURE);
665 }
666
667 Monitor *
668 dirtomon(int dir) {
669 Monitor *m = NULL;
670
671 if(dir > 0) {
672 if(!(m = selmon->next))
673 m = mons;
674 }
675 else {
676 if(selmon == mons)
677 for(m = mons; m->next; m = m->next);
678 else
679 for(m = mons; m->next != selmon; m = m->next);
680 }
681 return m;
682 }
683
684 void
685 drawbar(Monitor *m) {
686 int x;
687 unsigned int i, occ = 0, urg = 0;
688 unsigned long *col;
689 Client *c;
690
691 for(c = m->clients; c; c = c->next) {
692 occ |= c->tags;
693 if(c->isurgent)
694 urg |= c->tags;
695 }
696 dc.x = 0;
697 for(i = 0; i < LENGTH(tags); i++) {
698 dc.w = TEXTW(tags[i]);
699 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
700 drawtext(tags[i], col, urg & 1 << i);
701 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
702 occ & 1 << i, urg & 1 << i, col);
703 dc.x += dc.w;
704 }
705 dc.w = blw = TEXTW(m->ltsymbol);
706 drawtext(m->ltsymbol, dc.norm, False);
707 dc.x += dc.w;
708 x = dc.x;
709 if(m == selmon) { /* status is only drawn on selected monitor */
710 dc.w = TEXTW(stext);
711 dc.x = m->ww - dc.w;
712 if(dc.x < x) {
713 dc.x = x;
714 dc.w = m->ww - x;
715 }
716 drawtext(stext, dc.norm, False);
717 }
718 else
719 dc.x = m->ww;
720 if((dc.w = dc.x - x) > bh) {
721 dc.x = x;
722 if(m->sel) {
723 col = m == selmon ? dc.sel : dc.norm;
724 drawtext(m->sel->name, col, False);
725 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
726 }
727 else
728 drawtext(NULL, dc.norm, False);
729 }
730 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
731 XSync(dpy, False);
732 }
733
734 void
735 drawbars(void) {
736 Monitor *m;
737
738 for(m = mons; m; m = m->next)
739 drawbar(m);
740 }
741
742 void
743 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
744 int x;
745 XGCValues gcv;
746 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
747
748 gcv.foreground = col[invert ? ColBG : ColFG];
749 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
750 x = (dc.font.ascent + dc.font.descent + 2) / 4;
751 r.x = dc.x + 1;
752 r.y = dc.y + 1;
753 if(filled) {
754 r.width = r.height = x + 1;
755 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
756 }
757 else if(empty) {
758 r.width = r.height = x;
759 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
760 }
761 }
762
763 void
764 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
765 char buf[256];
766 int i, x, y, h, len, olen;
767 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
768
769 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
770 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
771 if(!text)
772 return;
773 olen = strlen(text);
774 h = dc.font.ascent + dc.font.descent;
775 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
776 x = dc.x + (h / 2);
777 /* shorten text if necessary */
778 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
779 if(!len)
780 return;
781 memcpy(buf, text, len);
782 if(len < olen)
783 for(i = len; i && i > len - 3; buf[--i] = '.');
784 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
785 if(dc.font.set)
786 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
787 else
788 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
789 }
790
791 void
792 enternotify(XEvent *e) {
793 Client *c;
794 Monitor *m;
795 XCrossingEvent *ev = &e->xcrossing;
796
797 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
798 return;
799 if((m = wintomon(ev->window)) && m != selmon) {
800 unfocus(selmon->sel, True);
801 selmon = m;
802 }
803 if((c = wintoclient(ev->window)))
804 focus(c);
805 else
806 focus(NULL);
807 }
808
809 void
810 expose(XEvent *e) {
811 Monitor *m;
812 XExposeEvent *ev = &e->xexpose;
813
814 if(ev->count == 0 && (m = wintomon(ev->window)))
815 drawbar(m);
816 }
817
818 void
819 focus(Client *c) {
820 if(!c || !ISVISIBLE(c))
821 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
822 /* was if(selmon->sel) */
823 if(selmon->sel && selmon->sel != c)
824 unfocus(selmon->sel, False);
825 if(c) {
826 if(c->mon != selmon)
827 selmon = c->mon;
828 if(c->isurgent)
829 clearurgent(c);
830 detachstack(c);
831 attachstack(c);
832 grabbuttons(c, True);
833 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
834 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
835 }
836 else
837 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
838 selmon->sel = c;
839 drawbars();
840 }
841
842 void
843 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
844 XFocusChangeEvent *ev = &e->xfocus;
845
846 if(selmon->sel && ev->window != selmon->sel->win)
847 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
848 }
849
850 void
851 focusmon(const Arg *arg) {
852 Monitor *m = NULL;
853
854 if(!mons->next)
855 return;
856 if((m = dirtomon(arg->i)) == selmon)
857 return;
858 unfocus(selmon->sel, True);
859 selmon = m;
860 focus(NULL);
861 }
862
863 void
864 focusstack(const Arg *arg) {
865 Client *c = NULL, *i;
866
867 if(!selmon->sel)
868 return;
869 if(arg->i > 0) {
870 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
871 if(!c)
872 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
873 }
874 else {
875 for(i = selmon->clients; i != selmon->sel; i = i->next)
876 if(ISVISIBLE(i))
877 c = i;
878 if(!c)
879 for(; i; i = i->next)
880 if(ISVISIBLE(i))
881 c = i;
882 }
883 if(c) {
884 focus(c);
885 restack(selmon);
886 }
887 }
888
889 unsigned long
890 getcolor(const char *colstr) {
891 Colormap cmap = DefaultColormap(dpy, screen);
892 XColor color;
893
894 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
895 die("error, cannot allocate color '%s'\n", colstr);
896 return color.pixel;
897 }
898
899 Bool
900 getrootptr(int *x, int *y) {
901 int di;
902 unsigned int dui;
903 Window dummy;
904
905 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
906 }
907
908 long
909 getstate(Window w) {
910 int format;
911 long result = -1;
912 unsigned char *p = NULL;
913 unsigned long n, extra;
914 Atom real;
915
916 if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
917 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
918 return -1;
919 if(n != 0)
920 result = *p;
921 XFree(p);
922 return result;
923 }
924
925 Bool
926 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
927 char **list = NULL;
928 int n;
929 XTextProperty name;
930
931 if(!text || size == 0)
932 return False;
933 text[0] = '\0';
934 XGetTextProperty(dpy, w, &name, atom);
935 if(!name.nitems)
936 return False;
937 if(name.encoding == XA_STRING)
938 strncpy(text, (char *)name.value, size - 1);
939 else {
940 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
941 strncpy(text, *list, size - 1);
942 XFreeStringList(list);
943 }
944 }
945 text[size - 1] = '\0';
946 XFree(name.value);
947 return True;
948 }
949
950 void
951 grabbuttons(Client *c, Bool focused) {
952 updatenumlockmask();
953 {
954 unsigned int i, j;
955 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
956 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
957 if(focused) {
958 for(i = 0; i < LENGTH(buttons); i++)
959 if(buttons[i].click == ClkClientWin)
960 for(j = 0; j < LENGTH(modifiers); j++)
961 XGrabButton(dpy, buttons[i].button,
962 buttons[i].mask | modifiers[j],
963 c->win, False, BUTTONMASK,
964 GrabModeAsync, GrabModeSync, None, None);
965 }
966 else
967 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
968 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
969 }
970 }
971
972 void
973 grabkeys(void) {
974 updatenumlockmask();
975 {
976 unsigned int i, j;
977 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
978 KeyCode code;
979
980 XUngrabKey(dpy, AnyKey, AnyModifier, root);
981 for(i = 0; i < LENGTH(keys); i++) {
982 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
983 for(j = 0; j < LENGTH(modifiers); j++)
984 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
985 True, GrabModeAsync, GrabModeAsync);
986 }
987 }
988 }
989
990 void
991 initfont(const char *fontstr) {
992 char *def, **missing;
993 int i, n;
994
995 missing = NULL;
996 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
997 if(missing) {
998 while(n--)
999 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
1000 XFreeStringList(missing);
1001 }
1002 if(dc.font.set) {
1003 XFontSetExtents *font_extents;
1004 XFontStruct **xfonts;
1005 char **font_names;
1006
1007 dc.font.ascent = dc.font.descent = 0;
1008 font_extents = XExtentsOfFontSet(dc.font.set);
1009 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
1010 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
1011 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
1012 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
1013 xfonts++;
1014 }
1015 }
1016 else {
1017 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
1018 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
1019 die("error, cannot load font: '%s'\n", fontstr);
1020 dc.font.ascent = dc.font.xfont->ascent;
1021 dc.font.descent = dc.font.xfont->descent;
1022 }
1023 dc.font.height = dc.font.ascent + dc.font.descent;
1024 }
1025
1026 Bool
1027 isprotodel(Client *c) {
1028 int i, n;
1029 Atom *protocols;
1030 Bool ret = False;
1031
1032 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1033 for(i = 0; !ret && i < n; i++)
1034 if(protocols[i] == wmatom[WMDelete])
1035 ret = True;
1036 XFree(protocols);
1037 }
1038 return ret;
1039 }
1040
1041 #ifdef XINERAMA
1042 static Bool
1043 isuniquegeom(XineramaScreenInfo *unique, size_t len, XineramaScreenInfo *info) {
1044 unsigned int i;
1045
1046 for(i = 0; i < len; i++)
1047 if(unique[i].x_org == info->x_org && unique[i].y_org == info->y_org
1048 && unique[i].width == info->width && unique[i].height == info->height)
1049 return False;
1050 return True;
1051 }
1052 #endif /* XINERAMA */
1053
1054 void
1055 keypress(XEvent *e) {
1056 unsigned int i;
1057 KeySym keysym;
1058 XKeyEvent *ev;
1059
1060 ev = &e->xkey;
1061 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1062 for(i = 0; i < LENGTH(keys); i++)
1063 if(keysym == keys[i].keysym
1064 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1065 && keys[i].func)
1066 keys[i].func(&(keys[i].arg));
1067 }
1068
1069 void
1070 killclient(const Arg *arg) {
1071 XEvent ev;
1072
1073 if(!selmon->sel)
1074 return;
1075 if(isprotodel(selmon->sel)) {
1076 ev.type = ClientMessage;
1077 ev.xclient.window = selmon->sel->win;
1078 ev.xclient.message_type = wmatom[WMProtocols];
1079 ev.xclient.format = 32;
1080 ev.xclient.data.l[0] = wmatom[WMDelete];
1081 ev.xclient.data.l[1] = CurrentTime;
1082 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1083 }
1084 else {
1085 XGrabServer(dpy);
1086 XSetErrorHandler(xerrordummy);
1087 XSetCloseDownMode(dpy, DestroyAll);
1088 XKillClient(dpy, selmon->sel->win);
1089 XSync(dpy, False);
1090 XSetErrorHandler(xerror);
1091 XUngrabServer(dpy);
1092 }
1093 }
1094
1095 void
1096 manage(Window w, XWindowAttributes *wa) {
1097 static Client cz;
1098 Client *c, *t = NULL;
1099 Window trans = None;
1100 XWindowChanges wc;
1101
1102 if(!(c = malloc(sizeof(Client))))
1103 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1104 *c = cz;
1105 c->win = w;
1106 updatetitle(c);
1107 if(XGetTransientForHint(dpy, w, &trans))
1108 t = wintoclient(trans);
1109 if(t) {
1110 c->mon = t->mon;
1111 c->tags = t->tags;
1112 }
1113 else {
1114 c->mon = selmon;
1115 applyrules(c);
1116 }
1117 /* geometry */
1118 c->x = c->oldx = wa->x + c->mon->wx;
1119 c->y = c->oldy = wa->y + c->mon->wy;
1120 c->w = c->oldw = wa->width;
1121 c->h = c->oldh = wa->height;
1122 c->oldbw = wa->border_width;
1123 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1124 c->isfloating = 1;
1125 c->x = c->mon->mx;
1126 c->y = c->mon->my;
1127 c->bw = 0;
1128 }
1129 else {
1130 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1131 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1132 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1133 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1134 c->x = MAX(c->x, c->mon->mx);
1135 /* only fix client y-offset, if the client center might cover the bar */
1136 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1137 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1138 c->bw = borderpx;
1139 }
1140 wc.border_width = c->bw;
1141 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1142 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1143 configure(c); /* propagates border_width, if size doesn't change */
1144 updatesizehints(c);
1145 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1146 grabbuttons(c, False);
1147 if(!c->isfloating)
1148 c->isfloating = c->oldstate = trans != None || c->isfixed;
1149 if(c->isfloating)
1150 XRaiseWindow(dpy, c->win);
1151 attach(c);
1152 attachstack(c);
1153 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1154 XMapWindow(dpy, c->win);
1155 setclientstate(c, NormalState);
1156 arrange(c->mon);
1157 }
1158
1159 void
1160 mappingnotify(XEvent *e) {
1161 XMappingEvent *ev = &e->xmapping;
1162
1163 XRefreshKeyboardMapping(ev);
1164 if(ev->request == MappingKeyboard)
1165 grabkeys();
1166 }
1167
1168 void
1169 maprequest(XEvent *e) {
1170 static XWindowAttributes wa;
1171 XMapRequestEvent *ev = &e->xmaprequest;
1172
1173 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1174 return;
1175 if(wa.override_redirect)
1176 return;
1177 if(!wintoclient(ev->window))
1178 manage(ev->window, &wa);
1179 }
1180
1181 void
1182 monocle(Monitor *m) {
1183 unsigned int n = 0;
1184 Client *c;
1185
1186 for(c = m->clients; c; c = c->next)
1187 if(ISVISIBLE(c))
1188 n++;
1189 if(n > 0) /* override layout symbol */
1190 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1191 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1192 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1193 }
1194
1195 void
1196 movemouse(const Arg *arg) {
1197 int x, y, ocx, ocy, nx, ny;
1198 Client *c;
1199 Monitor *m;
1200 XEvent ev;
1201
1202 if(!(c = selmon->sel))
1203 return;
1204 restack(selmon);
1205 ocx = c->x;
1206 ocy = c->y;
1207 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1208 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1209 return;
1210 if(!getrootptr(&x, &y))
1211 return;
1212 do {
1213 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1214 switch (ev.type) {
1215 case ConfigureRequest:
1216 case Expose:
1217 case MapRequest:
1218 handler[ev.type](&ev);
1219 break;
1220 case MotionNotify:
1221 nx = ocx + (ev.xmotion.x - x);
1222 ny = ocy + (ev.xmotion.y - y);
1223 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1224 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1225 if(abs(selmon->wx - nx) < snap)
1226 nx = selmon->wx;
1227 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1228 nx = selmon->wx + selmon->ww - WIDTH(c);
1229 if(abs(selmon->wy - ny) < snap)
1230 ny = selmon->wy;
1231 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1232 ny = selmon->wy + selmon->wh - HEIGHT(c);
1233 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1234 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1235 togglefloating(NULL);
1236 }
1237 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1238 resize(c, nx, ny, c->w, c->h, True);
1239 break;
1240 }
1241 } while(ev.type != ButtonRelease);
1242 XUngrabPointer(dpy, CurrentTime);
1243 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1244 sendmon(c, m);
1245 selmon = m;
1246 focus(NULL);
1247 }
1248 }
1249
1250 Client *
1251 nexttiled(Client *c) {
1252 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1253 return c;
1254 }
1255
1256 Monitor *
1257 ptrtomon(int x, int y) {
1258 Monitor *m;
1259
1260 for(m = mons; m; m = m->next)
1261 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1262 return m;
1263 return selmon;
1264 }
1265
1266 void
1267 propertynotify(XEvent *e) {
1268 Client *c;
1269 Window trans;
1270 XPropertyEvent *ev = &e->xproperty;
1271
1272 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1273 updatestatus();
1274 else if(ev->state == PropertyDelete)
1275 return; /* ignore */
1276 else if((c = wintoclient(ev->window))) {
1277 switch (ev->atom) {
1278 default: break;
1279 case XA_WM_TRANSIENT_FOR:
1280 XGetTransientForHint(dpy, c->win, &trans);
1281 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1282 arrange(c->mon);
1283 break;
1284 case XA_WM_NORMAL_HINTS:
1285 updatesizehints(c);
1286 break;
1287 case XA_WM_HINTS:
1288 updatewmhints(c);
1289 drawbars();
1290 break;
1291 }
1292 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1293 updatetitle(c);
1294 if(c == c->mon->sel)
1295 drawbar(c->mon);
1296 }
1297 }
1298 }
1299
1300 void
1301 clientmessage(XEvent *e) {
1302 XClientMessageEvent *cme = &e->xclient;
1303 Client *c;
1304
1305 if((c = wintoclient(cme->window))
1306 && (cme->message_type == netatom[NetWMState] && cme->data.l[1] == netatom[NetWMFullscreen]))
1307 {
1308 if(cme->data.l[0]) {
1309 XChangeProperty(dpy, cme->window, netatom[NetWMState], XA_ATOM, 32,
1310 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1311 c->oldstate = c->isfloating;
1312 c->oldbw = c->bw;
1313 c->bw = 0;
1314 c->isfloating = 1;
1315 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1316 XRaiseWindow(dpy, c->win);
1317 }
1318 else {
1319 XChangeProperty(dpy, cme->window, netatom[NetWMState], XA_ATOM, 32,
1320 PropModeReplace, (unsigned char*)0, 0);
1321 c->isfloating = c->oldstate;
1322 c->bw = c->oldbw;
1323 c->x = c->oldx;
1324 c->y = c->oldy;
1325 c->w = c->oldw;
1326 c->h = c->oldh;
1327 resizeclient(c, c->x, c->y, c->w, c->h);
1328 arrange(c->mon);
1329 }
1330 }
1331 }
1332
1333 void
1334 quit(const Arg *arg) {
1335 running = False;
1336 }
1337
1338 void
1339 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1340 if(applysizehints(c, &x, &y, &w, &h, interact))
1341 resizeclient(c, x, y, w, h);
1342 }
1343
1344 void
1345 resizeclient(Client *c, int x, int y, int w, int h) {
1346 XWindowChanges wc;
1347
1348 c->oldx = c->x; c->x = wc.x = x;
1349 c->oldy = c->y; c->y = wc.y = y;
1350 c->oldw = c->w; c->w = wc.width = w;
1351 c->oldh = c->h; c->h = wc.height = h;
1352 wc.border_width = c->bw;
1353 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1354 configure(c);
1355 XSync(dpy, False);
1356 }
1357
1358 void
1359 resizemouse(const Arg *arg) {
1360 int ocx, ocy;
1361 int nw, nh;
1362 Client *c;
1363 Monitor *m;
1364 XEvent ev;
1365
1366 if(!(c = selmon->sel))
1367 return;
1368 restack(selmon);
1369 ocx = c->x;
1370 ocy = c->y;
1371 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1372 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1373 return;
1374 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1375 do {
1376 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1377 switch(ev.type) {
1378 case ConfigureRequest:
1379 case Expose:
1380 case MapRequest:
1381 handler[ev.type](&ev);
1382 break;
1383 case MotionNotify:
1384 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1385 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1386 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1387 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh)
1388 {
1389 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1390 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1391 togglefloating(NULL);
1392 }
1393 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1394 resize(c, c->x, c->y, nw, nh, True);
1395 break;
1396 }
1397 } while(ev.type != ButtonRelease);
1398 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1399 XUngrabPointer(dpy, CurrentTime);
1400 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1401 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1402 sendmon(c, m);
1403 selmon = m;
1404 focus(NULL);
1405 }
1406 }
1407
1408 void
1409 restack(Monitor *m) {
1410 Client *c;
1411 XEvent ev;
1412 XWindowChanges wc;
1413
1414 drawbar(m);
1415 if(!m->sel)
1416 return;
1417 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1418 XRaiseWindow(dpy, m->sel->win);
1419 if(m->lt[m->sellt]->arrange) {
1420 wc.stack_mode = Below;
1421 wc.sibling = m->barwin;
1422 for(c = m->stack; c; c = c->snext)
1423 if(!c->isfloating && ISVISIBLE(c)) {
1424 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1425 wc.sibling = c->win;
1426 }
1427 }
1428 XSync(dpy, False);
1429 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1430 }
1431
1432 void
1433 run(void) {
1434 XEvent ev;
1435 /* main event loop */
1436 XSync(dpy, False);
1437 while(running && !XNextEvent(dpy, &ev)) {
1438 if(handler[ev.type])
1439 handler[ev.type](&ev); /* call handler */
1440 }
1441 }
1442
1443 void
1444 scan(void) {
1445 unsigned int i, num;
1446 Window d1, d2, *wins = NULL;
1447 XWindowAttributes wa;
1448
1449 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1450 for(i = 0; i < num; i++) {
1451 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1452 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1453 continue;
1454 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1455 manage(wins[i], &wa);
1456 }
1457 for(i = 0; i < num; i++) { /* now the transients */
1458 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1459 continue;
1460 if(XGetTransientForHint(dpy, wins[i], &d1)
1461 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1462 manage(wins[i], &wa);
1463 }
1464 if(wins)
1465 XFree(wins);
1466 }
1467 }
1468
1469 void
1470 sendmon(Client *c, Monitor *m) {
1471 if(c->mon == m)
1472 return;
1473 unfocus(c, True);
1474 detach(c);
1475 detachstack(c);
1476 c->mon = m;
1477 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1478 attach(c);
1479 attachstack(c);
1480 focus(NULL);
1481 arrange(NULL);
1482 }
1483
1484 void
1485 setclientstate(Client *c, long state) {
1486 long data[] = { state, None };
1487
1488 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1489 PropModeReplace, (unsigned char *)data, 2);
1490 }
1491
1492 void
1493 setlayout(const Arg *arg) {
1494 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1495 selmon->sellt ^= 1;
1496 if(arg && arg->v)
1497 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1498 strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1499 if(selmon->sel)
1500 arrange(selmon);
1501 else
1502 drawbar(selmon);
1503 }
1504
1505 /* arg > 1.0 will set mfact absolutly */
1506 void
1507 setmfact(const Arg *arg) {
1508 float f;
1509
1510 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1511 return;
1512 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1513 if(f < 0.1 || f > 0.9)
1514 return;
1515 selmon->mfact = f;
1516 arrange(selmon);
1517 }
1518
1519 void
1520 setup(void) {
1521 XSetWindowAttributes wa;
1522
1523 /* clean up any zombies immediately */
1524 sigchld(0);
1525
1526 /* init screen */
1527 screen = DefaultScreen(dpy);
1528 root = RootWindow(dpy, screen);
1529 initfont(font);
1530 sw = DisplayWidth(dpy, screen);
1531 sh = DisplayHeight(dpy, screen);
1532 bh = dc.h = dc.font.height + 2;
1533 updategeom();
1534 /* init atoms */
1535 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1536 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1537 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1538 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1539 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1540 netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1541 netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1542 /* init cursors */
1543 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1544 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1545 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1546 /* init appearance */
1547 dc.norm[ColBorder] = getcolor(normbordercolor);
1548 dc.norm[ColBG] = getcolor(normbgcolor);
1549 dc.norm[ColFG] = getcolor(normfgcolor);
1550 dc.sel[ColBorder] = getcolor(selbordercolor);
1551 dc.sel[ColBG] = getcolor(selbgcolor);
1552 dc.sel[ColFG] = getcolor(selfgcolor);
1553 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1554 dc.gc = XCreateGC(dpy, root, 0, NULL);
1555 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1556 if(!dc.font.set)
1557 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1558 /* init bars */
1559 updatebars();
1560 updatestatus();
1561 /* EWMH support per view */
1562 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1563 PropModeReplace, (unsigned char *) netatom, NetLast);
1564 /* select for events */
1565 wa.cursor = cursor[CurNormal];
1566 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1567 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1568 |PropertyChangeMask;
1569 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1570 XSelectInput(dpy, root, wa.event_mask);
1571 grabkeys();
1572 }
1573
1574 void
1575 showhide(Client *c) {
1576 if(!c)
1577 return;
1578 if(ISVISIBLE(c)) { /* show clients top down */
1579 XMoveWindow(dpy, c->win, c->x, c->y);
1580 if(!c->mon->lt[c->mon->sellt]->arrange || c->isfloating)
1581 resize(c, c->x, c->y, c->w, c->h, False);
1582 showhide(c->snext);
1583 }
1584 else { /* hide clients bottom up */
1585 showhide(c->snext);
1586 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1587 }
1588 }
1589
1590
1591 void
1592 sigchld(int unused) {
1593 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1594 die("Can't install SIGCHLD handler");
1595 while(0 < waitpid(-1, NULL, WNOHANG));
1596 }
1597
1598 void
1599 spawn(const Arg *arg) {
1600 if(fork() == 0) {
1601 if(dpy)
1602 close(ConnectionNumber(dpy));
1603 setsid();
1604 execvp(((char **)arg->v)[0], (char **)arg->v);
1605 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1606 perror(" failed");
1607 exit(0);
1608 }
1609 }
1610
1611 void
1612 tag(const Arg *arg) {
1613 if(selmon->sel && arg->ui & TAGMASK) {
1614 selmon->sel->tags = arg->ui & TAGMASK;
1615 arrange(selmon);
1616 }
1617 }
1618
1619 void
1620 tagmon(const Arg *arg) {
1621 if(!selmon->sel || !mons->next)
1622 return;
1623 sendmon(selmon->sel, dirtomon(arg->i));
1624 }
1625
1626 int
1627 textnw(const char *text, unsigned int len) {
1628 XRectangle r;
1629
1630 if(dc.font.set) {
1631 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1632 return r.width;
1633 }
1634 return XTextWidth(dc.font.xfont, text, len);
1635 }
1636
1637 void
1638 tile(Monitor *m) {
1639 int x, y, h, w, mw;
1640 unsigned int i, n;
1641 Client *c;
1642
1643 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1644 if(n == 0)
1645 return;
1646 /* master */
1647 c = nexttiled(m->clients);
1648 mw = m->mfact * m->ww;
1649 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1650 if(--n == 0)
1651 return;
1652 /* tile stack */
1653 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1654 y = m->wy;
1655 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1656 h = m->wh / n;
1657 if(h < bh)
1658 h = m->wh;
1659 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1660 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1661 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1662 if(h != m->wh)
1663 y = c->y + HEIGHT(c);
1664 }
1665 }
1666
1667 void
1668 togglebar(const Arg *arg) {
1669 selmon->showbar = !selmon->showbar;
1670 updatebarpos(selmon);
1671 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1672 arrange(selmon);
1673 }
1674
1675 void
1676 togglefloating(const Arg *arg) {
1677 if(!selmon->sel)
1678 return;
1679 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1680 if(selmon->sel->isfloating)
1681 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1682 selmon->sel->w, selmon->sel->h, False);
1683 arrange(selmon);
1684 }
1685
1686 void
1687 toggletag(const Arg *arg) {
1688 unsigned int newtags;
1689
1690 if(!selmon->sel)
1691 return;
1692 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1693 if(newtags) {
1694 selmon->sel->tags = newtags;
1695 arrange(selmon);
1696 }
1697 }
1698
1699 void
1700 toggleview(const Arg *arg) {
1701 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1702
1703 if(newtagset) {
1704 selmon->tagset[selmon->seltags] = newtagset;
1705 arrange(selmon);
1706 }
1707 }
1708
1709 void
1710 unfocus(Client *c, Bool setfocus) {
1711 if(!c)
1712 return;
1713 grabbuttons(c, False);
1714 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1715 if(setfocus)
1716 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1717 }
1718
1719 void
1720 unmanage(Client *c, Bool destroyed) {
1721 Monitor *m = c->mon;
1722 XWindowChanges wc;
1723
1724 /* The server grab construct avoids race conditions. */
1725 detach(c);
1726 detachstack(c);
1727 if(!destroyed) {
1728 wc.border_width = c->oldbw;
1729 XGrabServer(dpy);
1730 XSetErrorHandler(xerrordummy);
1731 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1732 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1733 setclientstate(c, WithdrawnState);
1734 XSync(dpy, False);
1735 XSetErrorHandler(xerror);
1736 XUngrabServer(dpy);
1737 }
1738 free(c);
1739 focus(NULL);
1740 arrange(m);
1741 }
1742
1743 void
1744 unmapnotify(XEvent *e) {
1745 Client *c;
1746 XUnmapEvent *ev = &e->xunmap;
1747
1748 if((c = wintoclient(ev->window)))
1749 unmanage(c, False);
1750 }
1751
1752 void
1753 updatebars(void) {
1754 Monitor *m;
1755 XSetWindowAttributes wa;
1756
1757 wa.override_redirect = True;
1758 wa.background_pixmap = ParentRelative;
1759 wa.event_mask = ButtonPressMask|ExposureMask;
1760 for(m = mons; m; m = m->next) {
1761 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1762 CopyFromParent, DefaultVisual(dpy, screen),
1763 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1764 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1765 XMapRaised(dpy, m->barwin);
1766 }
1767 }
1768
1769 void
1770 updatebarpos(Monitor *m) {
1771 m->wy = m->my;
1772 m->wh = m->mh;
1773 if(m->showbar) {
1774 m->wh -= bh;
1775 m->by = m->topbar ? m->wy : m->wy + m->wh;
1776 m->wy = m->topbar ? m->wy + bh : m->wy;
1777 }
1778 else
1779 m->by = -bh;
1780 }
1781
1782 Bool
1783 updategeom(void) {
1784 Bool dirty = False;
1785
1786 #ifdef XINERAMA
1787 if(XineramaIsActive(dpy)) {
1788 int i, j, n, nn;
1789 Client *c;
1790 Monitor *m;
1791 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1792 XineramaScreenInfo *unique = NULL;
1793
1794 for(n = 0, m = mons; m; m = m->next, n++);
1795 /* only consider unique geometries as separate screens */
1796 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
1797 die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
1798 for(i = 0, j = 0; i < nn; i++)
1799 if(isuniquegeom(unique, j, &info[i]))
1800 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1801 XFree(info);
1802 nn = j;
1803 if(n <= nn) {
1804 for(i = 0; i < (nn - n); i++) { /* new monitors available */
1805 for(m = mons; m && m->next; m = m->next);
1806 if(m)
1807 m->next = createmon();
1808 else
1809 mons = createmon();
1810 }
1811 for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1812 if(i >= n
1813 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1814 || unique[i].width != m->mw || unique[i].height != m->mh))
1815 {
1816 dirty = True;
1817 m->num = i;
1818 m->mx = m->wx = unique[i].x_org;
1819 m->my = m->wy = unique[i].y_org;
1820 m->mw = m->ww = unique[i].width;
1821 m->mh = m->wh = unique[i].height;
1822 updatebarpos(m);
1823 }
1824 }
1825 else { /* less monitors available nn < n */
1826 for(i = nn; i < n; i++) {
1827 for(m = mons; m && m->next; m = m->next);
1828 while(m->clients) {
1829 dirty = True;
1830 c = m->clients;
1831 m->clients = c->next;
1832 detachstack(c);
1833 c->mon = mons;
1834 attach(c);
1835 attachstack(c);
1836 }
1837 if(m == selmon)
1838 selmon = mons;
1839 cleanupmon(m);
1840 }
1841 }
1842 free(unique);
1843 }
1844 else
1845 #endif /* XINERAMA */
1846 /* default monitor setup */
1847 {
1848 if(!mons)
1849 mons = createmon();
1850 if(mons->mw != sw || mons->mh != sh) {
1851 dirty = True;
1852 mons->mw = mons->ww = sw;
1853 mons->mh = mons->wh = sh;
1854 updatebarpos(mons);
1855 }
1856 }
1857 if(dirty) {
1858 selmon = mons;
1859 selmon = wintomon(root);
1860 }
1861 return dirty;
1862 }
1863
1864 void
1865 updatenumlockmask(void) {
1866 unsigned int i, j;
1867 XModifierKeymap *modmap;
1868
1869 numlockmask = 0;
1870 modmap = XGetModifierMapping(dpy);
1871 for(i = 0; i < 8; i++)
1872 for(j = 0; j < modmap->max_keypermod; j++)
1873 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1874 == XKeysymToKeycode(dpy, XK_Num_Lock))
1875 numlockmask = (1 << i);
1876 XFreeModifiermap(modmap);
1877 }
1878
1879 void
1880 updatesizehints(Client *c) {
1881 long msize;
1882 XSizeHints size;
1883
1884 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1885 /* size is uninitialized, ensure that size.flags aren't used */
1886 size.flags = PSize;
1887 if(size.flags & PBaseSize) {
1888 c->basew = size.base_width;
1889 c->baseh = size.base_height;
1890 }
1891 else if(size.flags & PMinSize) {
1892 c->basew = size.min_width;
1893 c->baseh = size.min_height;
1894 }
1895 else
1896 c->basew = c->baseh = 0;
1897 if(size.flags & PResizeInc) {
1898 c->incw = size.width_inc;
1899 c->inch = size.height_inc;
1900 }
1901 else
1902 c->incw = c->inch = 0;
1903 if(size.flags & PMaxSize) {
1904 c->maxw = size.max_width;
1905 c->maxh = size.max_height;
1906 }
1907 else
1908 c->maxw = c->maxh = 0;
1909 if(size.flags & PMinSize) {
1910 c->minw = size.min_width;
1911 c->minh = size.min_height;
1912 }
1913 else if(size.flags & PBaseSize) {
1914 c->minw = size.base_width;
1915 c->minh = size.base_height;
1916 }
1917 else
1918 c->minw = c->minh = 0;
1919 if(size.flags & PAspect) {
1920 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1921 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1922 }
1923 else
1924 c->maxa = c->mina = 0.0;
1925 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1926 && c->maxw == c->minw && c->maxh == c->minh);
1927 }
1928
1929 void
1930 updatetitle(Client *c) {
1931 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1932 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1933 if(c->name[0] == '\0') /* hack to mark broken clients */
1934 strcpy(c->name, broken);
1935 }
1936
1937 void
1938 updatestatus(void) {
1939 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1940 strcpy(stext, "dwm-"VERSION);
1941 drawbar(selmon);
1942 }
1943
1944 void
1945 updatewmhints(Client *c) {
1946 XWMHints *wmh;
1947
1948 if((wmh = XGetWMHints(dpy, c->win))) {
1949 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1950 wmh->flags &= ~XUrgencyHint;
1951 XSetWMHints(dpy, c->win, wmh);
1952 }
1953 else
1954 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1955 XFree(wmh);
1956 }
1957 }
1958
1959 void
1960 view(const Arg *arg) {
1961 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1962 return;
1963 selmon->seltags ^= 1; /* toggle sel tagset */
1964 if(arg->ui & TAGMASK)
1965 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1966 arrange(selmon);
1967 }
1968
1969 Client *
1970 wintoclient(Window w) {
1971 Client *c;
1972 Monitor *m;
1973
1974 for(m = mons; m; m = m->next)
1975 for(c = m->clients; c; c = c->next)
1976 if(c->win == w)
1977 return c;
1978 return NULL;
1979 }
1980
1981 Monitor *
1982 wintomon(Window w) {
1983 int x, y;
1984 Client *c;
1985 Monitor *m;
1986
1987 if(w == root && getrootptr(&x, &y))
1988 return ptrtomon(x, y);
1989 for(m = mons; m; m = m->next)
1990 if(w == m->barwin)
1991 return m;
1992 if((c = wintoclient(w)))
1993 return c->mon;
1994 return selmon;
1995 }
1996
1997 /* There's no way to check accesses to destroyed windows, thus those cases are
1998 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1999 * default error handler, which may call exit. */
2000 int
2001 xerror(Display *dpy, XErrorEvent *ee) {
2002 if(ee->error_code == BadWindow
2003 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2004 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2005 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2006 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2007 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2008 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2009 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2010 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2011 return 0;
2012 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2013 ee->request_code, ee->error_code);
2014 return xerrorxlib(dpy, ee); /* may call exit */
2015 }
2016
2017 int
2018 xerrordummy(Display *dpy, XErrorEvent *ee) {
2019 return 0;
2020 }
2021
2022 /* Startup Error handler to check if another window manager
2023 * is already running. */
2024 int
2025 xerrorstart(Display *dpy, XErrorEvent *ee) {
2026 otherwm = True;
2027 return -1;
2028 }
2029
2030 void
2031 zoom(const Arg *arg) {
2032 Client *c = selmon->sel;
2033
2034 if(!selmon->lt[selmon->sellt]->arrange
2035 || selmon->lt[selmon->sellt]->arrange == monocle
2036 || (selmon->sel && selmon->sel->isfloating))
2037 return;
2038 if(c == nexttiled(selmon->clients))
2039 if(!c || !(c = nexttiled(c->next)))
2040 return;
2041 detach(c);
2042 attach(c);
2043 focus(c);
2044 arrange(c->mon);
2045 }
2046
2047 int
2048 main(int argc, char *argv[]) {
2049 if(argc == 2 && !strcmp("-v", argv[1]))
2050 die("dwm-"VERSION", © 2006-2010 dwm engineers, see LICENSE for details\n");
2051 else if(argc != 1)
2052 die("usage: dwm [-v]\n");
2053 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2054 fputs("warning: no locale support\n", stderr);
2055 if(!(dpy = XOpenDisplay(NULL)))
2056 die("dwm: cannot open display\n");
2057 checkotherwm();
2058 setup();
2059 scan();
2060 run();
2061 cleanup();
2062 XCloseDisplay(dpy);
2063 return 0;
2064 }