dwm.c (view raw)
1/* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * 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#include <X11/Xft/Xft.h>
43
44#include "drw.h"
45#include "util.h"
46
47/* macros */
48#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
49#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
50#define INTERSECT(x,y,w,h,m) (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
51 * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
52#define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
53#define LENGTH(X) (sizeof X / sizeof X[0])
54#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
55#define WIDTH(X) ((X)->w + 2 * (X)->bw)
56#define HEIGHT(X) ((X)->h + 2 * (X)->bw)
57#define TAGMASK ((1 << LENGTH(tags)) - 1)
58#define TEXTW(X) (drw_text(drw, 0, 0, 0, 0, (X), 0) + drw->fonts[0]->h)
59
60/* enums */
61enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
62enum { SchemeNorm, SchemeSel, SchemeLast }; /* color schemes */
63enum { NetSupported, NetWMName, NetWMState,
64 NetWMFullscreen, NetActiveWindow, NetWMWindowType,
65 NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
66enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
67enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
68 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
69
70typedef union {
71 int i;
72 unsigned int ui;
73 float f;
74 const void *v;
75} Arg;
76
77typedef struct {
78 unsigned int click;
79 unsigned int mask;
80 unsigned int button;
81 void (*func)(const Arg *arg);
82 const Arg arg;
83} Button;
84
85typedef struct Monitor Monitor;
86typedef struct Client Client;
87struct Client {
88 char name[256];
89 float mina, maxa;
90 int x, y, w, h;
91 int oldx, oldy, oldw, oldh;
92 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
93 int bw, oldbw;
94 unsigned int tags;
95 Bool isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
96 Client *next;
97 Client *snext;
98 Monitor *mon;
99 Window win;
100};
101
102typedef struct {
103 unsigned int mod;
104 KeySym keysym;
105 void (*func)(const Arg *);
106 const Arg arg;
107} Key;
108
109typedef struct {
110 const char *symbol;
111 void (*arrange)(Monitor *);
112} Layout;
113
114struct Monitor {
115 char ltsymbol[16];
116 float mfact;
117 int nmaster;
118 int num;
119 int by; /* bar geometry */
120 int mx, my, mw, mh; /* screen size */
121 int wx, wy, ww, wh; /* window area */
122 unsigned int seltags;
123 unsigned int sellt;
124 unsigned int tagset[2];
125 Bool showbar;
126 Bool topbar;
127 Client *clients;
128 Client *sel;
129 Client *stack;
130 Monitor *next;
131 Window barwin;
132 const Layout *lt[2];
133};
134
135typedef struct {
136 const char *class;
137 const char *instance;
138 const char *title;
139 unsigned int tags;
140 Bool isfloating;
141 int monitor;
142} Rule;
143
144/* function declarations */
145static void applyrules(Client *c);
146static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
147static void arrange(Monitor *m);
148static void arrangemon(Monitor *m);
149static void attach(Client *c);
150static void attachstack(Client *c);
151static void buttonpress(XEvent *e);
152static void checkotherwm(void);
153static void cleanup(void);
154static void cleanupmon(Monitor *mon);
155static void clearurgent(Client *c);
156static void clientmessage(XEvent *e);
157static void configure(Client *c);
158static void configurenotify(XEvent *e);
159static void configurerequest(XEvent *e);
160static Monitor *createmon(void);
161static void destroynotify(XEvent *e);
162static void detach(Client *c);
163static void detachstack(Client *c);
164static Monitor *dirtomon(int dir);
165static void drawbar(Monitor *m);
166static void drawbars(void);
167static void enternotify(XEvent *e);
168static void expose(XEvent *e);
169static void focus(Client *c);
170static void focusin(XEvent *e);
171static void focusmon(const Arg *arg);
172static void focusstack(const Arg *arg);
173static Bool getrootptr(int *x, int *y);
174static long getstate(Window w);
175static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
176static void grabbuttons(Client *c, Bool focused);
177static void grabkeys(void);
178static void incnmaster(const Arg *arg);
179static void keypress(XEvent *e);
180static void killclient(const Arg *arg);
181static void manage(Window w, XWindowAttributes *wa);
182static void mappingnotify(XEvent *e);
183static void maprequest(XEvent *e);
184static void monocle(Monitor *m);
185static void motionnotify(XEvent *e);
186static void movemouse(const Arg *arg);
187static Client *nexttiled(Client *c);
188static void pop(Client *);
189static void propertynotify(XEvent *e);
190static void quit(const Arg *arg);
191static Monitor *recttomon(int x, int y, int w, int h);
192static void resize(Client *c, int x, int y, int w, int h, Bool interact);
193static void resizeclient(Client *c, int x, int y, int w, int h);
194static void resizemouse(const Arg *arg);
195static void restack(Monitor *m);
196static void run(void);
197static void scan(void);
198static Bool sendevent(Client *c, Atom proto);
199static void sendmon(Client *c, Monitor *m);
200static void setclientstate(Client *c, long state);
201static void setfocus(Client *c);
202static void setfullscreen(Client *c, Bool fullscreen);
203static void setlayout(const Arg *arg);
204static void setmfact(const Arg *arg);
205static void setup(void);
206static void showhide(Client *c);
207static void sigchld(int unused);
208static void spawn(const Arg *arg);
209static void tag(const Arg *arg);
210static void tagmon(const Arg *arg);
211static void tile(Monitor *);
212static void togglebar(const Arg *arg);
213static void togglefloating(const Arg *arg);
214static void toggletag(const Arg *arg);
215static void toggleview(const Arg *arg);
216static void unfocus(Client *c, Bool setfocus);
217static void unmanage(Client *c, Bool destroyed);
218static void unmapnotify(XEvent *e);
219static Bool updategeom(void);
220static void updatebarpos(Monitor *m);
221static void updatebars(void);
222static void updateclientlist(void);
223static void updatenumlockmask(void);
224static void updatesizehints(Client *c);
225static void updatestatus(void);
226static void updatewindowtype(Client *c);
227static void updatetitle(Client *c);
228static void updatewmhints(Client *c);
229static void view(const Arg *arg);
230static Client *wintoclient(Window w);
231static Monitor *wintomon(Window w);
232static int xerror(Display *dpy, XErrorEvent *ee);
233static int xerrordummy(Display *dpy, XErrorEvent *ee);
234static int xerrorstart(Display *dpy, XErrorEvent *ee);
235static void zoom(const Arg *arg);
236
237/* variables */
238static const char broken[] = "broken";
239static char stext[256];
240static int screen;
241static int sw, sh; /* X display screen geometry width, height */
242static int bh, blw = 0; /* bar geometry */
243static int (*xerrorxlib)(Display *, XErrorEvent *);
244static unsigned int numlockmask = 0;
245static void (*handler[LASTEvent]) (XEvent *) = {
246 [ButtonPress] = buttonpress,
247 [ClientMessage] = clientmessage,
248 [ConfigureRequest] = configurerequest,
249 [ConfigureNotify] = configurenotify,
250 [DestroyNotify] = destroynotify,
251 [EnterNotify] = enternotify,
252 [Expose] = expose,
253 [FocusIn] = focusin,
254 [KeyPress] = keypress,
255 [MappingNotify] = mappingnotify,
256 [MapRequest] = maprequest,
257 [MotionNotify] = motionnotify,
258 [PropertyNotify] = propertynotify,
259 [UnmapNotify] = unmapnotify
260};
261static Atom wmatom[WMLast], netatom[NetLast];
262static Bool running = True;
263static Cur *cursor[CurLast];
264static ClrScheme scheme[SchemeLast];
265static Display *dpy;
266static Drw *drw;
267static Monitor *mons, *selmon;
268static Window root;
269
270/* configuration, allows nested code to access above variables */
271#include "config.h"
272
273/* compile-time check if all tags fit into an unsigned int bit array. */
274struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
275
276/* function implementations */
277void
278applyrules(Client *c) {
279 const char *class, *instance;
280 unsigned int i;
281 const Rule *r;
282 Monitor *m;
283 XClassHint ch = { NULL, NULL };
284
285 /* rule matching */
286 c->isfloating = c->tags = 0;
287 XGetClassHint(dpy, c->win, &ch);
288 class = ch.res_class ? ch.res_class : broken;
289 instance = ch.res_name ? ch.res_name : broken;
290
291 for(i = 0; i < LENGTH(rules); i++) {
292 r = &rules[i];
293 if((!r->title || strstr(c->name, r->title))
294 && (!r->class || strstr(class, r->class))
295 && (!r->instance || strstr(instance, r->instance)))
296 {
297 c->isfloating = r->isfloating;
298 c->tags |= r->tags;
299 for(m = mons; m && m->num != r->monitor; m = m->next);
300 if(m)
301 c->mon = m;
302 }
303 }
304 if(ch.res_class)
305 XFree(ch.res_class);
306 if(ch.res_name)
307 XFree(ch.res_name);
308 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
309}
310
311Bool
312applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
313 Bool baseismin;
314 Monitor *m = c->mon;
315
316 /* set minimum possible */
317 *w = MAX(1, *w);
318 *h = MAX(1, *h);
319 if(interact) {
320 if(*x > sw)
321 *x = sw - WIDTH(c);
322 if(*y > sh)
323 *y = sh - HEIGHT(c);
324 if(*x + *w + 2 * c->bw < 0)
325 *x = 0;
326 if(*y + *h + 2 * c->bw < 0)
327 *y = 0;
328 }
329 else {
330 if(*x >= m->wx + m->ww)
331 *x = m->wx + m->ww - WIDTH(c);
332 if(*y >= m->wy + m->wh)
333 *y = m->wy + m->wh - HEIGHT(c);
334 if(*x + *w + 2 * c->bw <= m->wx)
335 *x = m->wx;
336 if(*y + *h + 2 * c->bw <= m->wy)
337 *y = m->wy;
338 }
339 if(*h < bh)
340 *h = bh;
341 if(*w < bh)
342 *w = bh;
343 if(resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
344 /* see last two sentences in ICCCM 4.1.2.3 */
345 baseismin = c->basew == c->minw && c->baseh == c->minh;
346 if(!baseismin) { /* temporarily remove base dimensions */
347 *w -= c->basew;
348 *h -= c->baseh;
349 }
350 /* adjust for aspect limits */
351 if(c->mina > 0 && c->maxa > 0) {
352 if(c->maxa < (float)*w / *h)
353 *w = *h * c->maxa + 0.5;
354 else if(c->mina < (float)*h / *w)
355 *h = *w * c->mina + 0.5;
356 }
357 if(baseismin) { /* increment calculation requires this */
358 *w -= c->basew;
359 *h -= c->baseh;
360 }
361 /* adjust for increment value */
362 if(c->incw)
363 *w -= *w % c->incw;
364 if(c->inch)
365 *h -= *h % c->inch;
366 /* restore base dimensions */
367 *w = MAX(*w + c->basew, c->minw);
368 *h = MAX(*h + c->baseh, c->minh);
369 if(c->maxw)
370 *w = MIN(*w, c->maxw);
371 if(c->maxh)
372 *h = MIN(*h, c->maxh);
373 }
374 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
375}
376
377void
378arrange(Monitor *m) {
379 if(m)
380 showhide(m->stack);
381 else for(m = mons; m; m = m->next)
382 showhide(m->stack);
383 if(m) {
384 arrangemon(m);
385 restack(m);
386 } else for(m = mons; m; m = m->next)
387 arrangemon(m);
388}
389
390void
391arrangemon(Monitor *m) {
392 strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
393 if(m->lt[m->sellt]->arrange)
394 m->lt[m->sellt]->arrange(m);
395}
396
397void
398attach(Client *c) {
399 c->next = c->mon->clients;
400 c->mon->clients = c;
401}
402
403void
404attachstack(Client *c) {
405 c->snext = c->mon->stack;
406 c->mon->stack = c;
407}
408
409void
410buttonpress(XEvent *e) {
411 unsigned int i, x, click;
412 Arg arg = {0};
413 Client *c;
414 Monitor *m;
415 XButtonPressedEvent *ev = &e->xbutton;
416
417 click = ClkRootWin;
418 /* focus monitor if necessary */
419 if((m = wintomon(ev->window)) && m != selmon) {
420 unfocus(selmon->sel, True);
421 selmon = m;
422 focus(NULL);
423 }
424 if(ev->window == selmon->barwin) {
425 i = x = 0;
426 do
427 x += TEXTW(tags[i]);
428 while(ev->x >= x && ++i < LENGTH(tags));
429 if(i < LENGTH(tags)) {
430 click = ClkTagBar;
431 arg.ui = 1 << i;
432 }
433 else if(ev->x < x + blw)
434 click = ClkLtSymbol;
435 else if(ev->x > selmon->ww - TEXTW(stext))
436 click = ClkStatusText;
437 else
438 click = ClkWinTitle;
439 }
440 else if((c = wintoclient(ev->window))) {
441 focus(c);
442 click = ClkClientWin;
443 }
444 for(i = 0; i < LENGTH(buttons); i++)
445 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
446 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
447 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
448}
449
450void
451checkotherwm(void) {
452 xerrorxlib = XSetErrorHandler(xerrorstart);
453 /* this causes an error if some other window manager is running */
454 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
455 XSync(dpy, False);
456 XSetErrorHandler(xerror);
457 XSync(dpy, False);
458}
459
460void
461cleanup(void) {
462 Arg a = {.ui = ~0};
463 Layout foo = { "", NULL };
464 Monitor *m;
465 size_t i;
466
467 view(&a);
468 selmon->lt[selmon->sellt] = &foo;
469 for(m = mons; m; m = m->next)
470 while(m->stack)
471 unmanage(m->stack, False);
472 XUngrabKey(dpy, AnyKey, AnyModifier, root);
473 while(mons)
474 cleanupmon(mons);
475 for(i = 0; i < CurLast; i++)
476 drw_cur_free(drw, cursor[i]);
477 for(i = 0; i < SchemeLast; i++) {
478 drw_clr_free(scheme[i].border);
479 drw_clr_free(scheme[i].bg);
480 drw_clr_free(scheme[i].fg);
481 }
482 drw_free(drw);
483 XSync(dpy, False);
484 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
485 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
486}
487
488void
489cleanupmon(Monitor *mon) {
490 Monitor *m;
491
492 if(mon == mons)
493 mons = mons->next;
494 else {
495 for(m = mons; m && m->next != mon; m = m->next);
496 m->next = mon->next;
497 }
498 XUnmapWindow(dpy, mon->barwin);
499 XDestroyWindow(dpy, mon->barwin);
500 free(mon);
501}
502
503void
504clearurgent(Client *c) {
505 XWMHints *wmh;
506
507 c->isurgent = False;
508 if(!(wmh = XGetWMHints(dpy, c->win)))
509 return;
510 wmh->flags &= ~XUrgencyHint;
511 XSetWMHints(dpy, c->win, wmh);
512 XFree(wmh);
513}
514
515void
516clientmessage(XEvent *e) {
517 XClientMessageEvent *cme = &e->xclient;
518 Client *c = wintoclient(cme->window);
519
520 if(!c)
521 return;
522 if(cme->message_type == netatom[NetWMState]) {
523 if(cme->data.l[1] == netatom[NetWMFullscreen] || cme->data.l[2] == netatom[NetWMFullscreen])
524 setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD */
525 || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
526 }
527 else if(cme->message_type == netatom[NetActiveWindow]) {
528 if(!ISVISIBLE(c)) {
529 c->mon->seltags ^= 1;
530 c->mon->tagset[c->mon->seltags] = c->tags;
531 }
532 pop(c);
533 }
534}
535
536void
537configure(Client *c) {
538 XConfigureEvent ce;
539
540 ce.type = ConfigureNotify;
541 ce.display = dpy;
542 ce.event = c->win;
543 ce.window = c->win;
544 ce.x = c->x;
545 ce.y = c->y;
546 ce.width = c->w;
547 ce.height = c->h;
548 ce.border_width = c->bw;
549 ce.above = None;
550 ce.override_redirect = False;
551 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
552}
553
554void
555configurenotify(XEvent *e) {
556 Monitor *m;
557 XConfigureEvent *ev = &e->xconfigure;
558 Bool dirty;
559
560 /* TODO: updategeom handling sucks, needs to be simplified */
561 if(ev->window == root) {
562 dirty = (sw != ev->width || sh != ev->height);
563 sw = ev->width;
564 sh = ev->height;
565 if(updategeom() || dirty) {
566 drw_resize(drw, sw, bh);
567 updatebars();
568 for(m = mons; m; m = m->next)
569 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
570 focus(NULL);
571 arrange(NULL);
572 }
573 }
574}
575
576void
577configurerequest(XEvent *e) {
578 Client *c;
579 Monitor *m;
580 XConfigureRequestEvent *ev = &e->xconfigurerequest;
581 XWindowChanges wc;
582
583 if((c = wintoclient(ev->window))) {
584 if(ev->value_mask & CWBorderWidth)
585 c->bw = ev->border_width;
586 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
587 m = c->mon;
588 if(ev->value_mask & CWX) {
589 c->oldx = c->x;
590 c->x = m->mx + ev->x;
591 }
592 if(ev->value_mask & CWY) {
593 c->oldy = c->y;
594 c->y = m->my + ev->y;
595 }
596 if(ev->value_mask & CWWidth) {
597 c->oldw = c->w;
598 c->w = ev->width;
599 }
600 if(ev->value_mask & CWHeight) {
601 c->oldh = c->h;
602 c->h = ev->height;
603 }
604 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
605 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
606 if((c->y + c->h) > m->my + m->mh && c->isfloating)
607 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
608 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
609 configure(c);
610 if(ISVISIBLE(c))
611 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
612 }
613 else
614 configure(c);
615 }
616 else {
617 wc.x = ev->x;
618 wc.y = ev->y;
619 wc.width = ev->width;
620 wc.height = ev->height;
621 wc.border_width = ev->border_width;
622 wc.sibling = ev->above;
623 wc.stack_mode = ev->detail;
624 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
625 }
626 XSync(dpy, False);
627}
628
629Monitor *
630createmon(void) {
631 Monitor *m;
632
633 m = ecalloc(1, sizeof(Monitor));
634 m->tagset[0] = m->tagset[1] = 1;
635 m->mfact = mfact;
636 m->nmaster = nmaster;
637 m->showbar = showbar;
638 m->topbar = topbar;
639 m->lt[0] = &layouts[0];
640 m->lt[1] = &layouts[1 % LENGTH(layouts)];
641 strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
642 return m;
643}
644
645void
646destroynotify(XEvent *e) {
647 Client *c;
648 XDestroyWindowEvent *ev = &e->xdestroywindow;
649
650 if((c = wintoclient(ev->window)))
651 unmanage(c, True);
652}
653
654void
655detach(Client *c) {
656 Client **tc;
657
658 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
659 *tc = c->next;
660}
661
662void
663detachstack(Client *c) {
664 Client **tc, *t;
665
666 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
667 *tc = c->snext;
668
669 if(c == c->mon->sel) {
670 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
671 c->mon->sel = t;
672 }
673}
674
675Monitor *
676dirtomon(int dir) {
677 Monitor *m = NULL;
678
679 if(dir > 0) {
680 if(!(m = selmon->next))
681 m = mons;
682 }
683 else if(selmon == mons)
684 for(m = mons; m->next; m = m->next);
685 else
686 for(m = mons; m->next != selmon; m = m->next);
687 return m;
688}
689
690void
691drawbar(Monitor *m) {
692 int x, xx, w;
693 unsigned int i, occ = 0, urg = 0;
694 Client *c;
695
696 for(c = m->clients; c; c = c->next) {
697 occ |= c->tags;
698 if(c->isurgent)
699 urg |= c->tags;
700 }
701 x = 0;
702 for(i = 0; i < LENGTH(tags); i++) {
703 w = TEXTW(tags[i]);
704 drw_setscheme(drw, m->tagset[m->seltags] & 1 << i ? &scheme[SchemeSel] : &scheme[SchemeNorm]);
705 drw_text(drw, x, 0, w, bh, tags[i], urg & 1 << i);
706 drw_rect(drw, x, 0, w, bh, m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
707 occ & 1 << i, urg & 1 << i);
708 x += w;
709 }
710 w = blw = TEXTW(m->ltsymbol);
711 drw_setscheme(drw, &scheme[SchemeNorm]);
712 drw_text(drw, x, 0, w, bh, m->ltsymbol, 0);
713 x += w;
714 xx = x;
715 if(m == selmon) { /* status is only drawn on selected monitor */
716 w = TEXTW(stext);
717 x = m->ww - w;
718 if(x < xx) {
719 x = xx;
720 w = m->ww - xx;
721 }
722 drw_text(drw, x, 0, w, bh, stext, 0);
723 }
724 else
725 x = m->ww;
726 if((w = x - xx) > bh) {
727 x = xx;
728 if(m->sel) {
729 drw_setscheme(drw, m == selmon ? &scheme[SchemeSel] : &scheme[SchemeNorm]);
730 drw_text(drw, x, 0, w, bh, m->sel->name, 0);
731 drw_rect(drw, x, 0, w, bh, m->sel->isfixed, m->sel->isfloating, 0);
732 }
733 else {
734 drw_setscheme(drw, &scheme[SchemeNorm]);
735 drw_text(drw, x, 0, w, bh, NULL, 0);
736 }
737 }
738 drw_map(drw, m->barwin, 0, 0, m->ww, bh);
739}
740
741void
742drawbars(void) {
743 Monitor *m;
744
745 for(m = mons; m; m = m->next)
746 drawbar(m);
747}
748
749void
750enternotify(XEvent *e) {
751 Client *c;
752 Monitor *m;
753 XCrossingEvent *ev = &e->xcrossing;
754
755 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
756 return;
757 c = wintoclient(ev->window);
758 m = c ? c->mon : wintomon(ev->window);
759 if(m != selmon) {
760 unfocus(selmon->sel, True);
761 selmon = m;
762 }
763 else if(!c || c == selmon->sel)
764 return;
765 focus(c);
766}
767
768void
769expose(XEvent *e) {
770 Monitor *m;
771 XExposeEvent *ev = &e->xexpose;
772
773 if(ev->count == 0 && (m = wintomon(ev->window)))
774 drawbar(m);
775}
776
777void
778focus(Client *c) {
779 if(!c || !ISVISIBLE(c))
780 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
781 /* was if(selmon->sel) */
782 if(selmon->sel && selmon->sel != c)
783 unfocus(selmon->sel, False);
784 if(c) {
785 if(c->mon != selmon)
786 selmon = c->mon;
787 if(c->isurgent)
788 clearurgent(c);
789 detachstack(c);
790 attachstack(c);
791 grabbuttons(c, True);
792 XSetWindowBorder(dpy, c->win, scheme[SchemeSel].border->pix);
793 setfocus(c);
794 }
795 else {
796 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
797 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
798 }
799 selmon->sel = c;
800 drawbars();
801}
802
803void
804focusin(XEvent *e) { /* there are some broken focus acquiring clients */
805 XFocusChangeEvent *ev = &e->xfocus;
806
807 if(selmon->sel && ev->window != selmon->sel->win)
808 setfocus(selmon->sel);
809}
810
811void
812focusmon(const Arg *arg) {
813 Monitor *m;
814
815 if(!mons->next)
816 return;
817 if((m = dirtomon(arg->i)) == selmon)
818 return;
819 unfocus(selmon->sel, False); /* s/True/False/ fixes input focus issues
820 in gedit and anjuta */
821 selmon = m;
822 focus(NULL);
823}
824
825void
826focusstack(const Arg *arg) {
827 Client *c = NULL, *i;
828
829 if(!selmon->sel)
830 return;
831 if(arg->i > 0) {
832 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
833 if(!c)
834 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
835 }
836 else {
837 for(i = selmon->clients; i != selmon->sel; i = i->next)
838 if(ISVISIBLE(i))
839 c = i;
840 if(!c)
841 for(; i; i = i->next)
842 if(ISVISIBLE(i))
843 c = i;
844 }
845 if(c) {
846 focus(c);
847 restack(selmon);
848 }
849}
850
851Atom
852getatomprop(Client *c, Atom prop) {
853 int di;
854 unsigned long dl;
855 unsigned char *p = NULL;
856 Atom da, atom = None;
857
858 if(XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
859 &da, &di, &dl, &dl, &p) == Success && p) {
860 atom = *(Atom *)p;
861 XFree(p);
862 }
863 return atom;
864}
865
866Bool
867getrootptr(int *x, int *y) {
868 int di;
869 unsigned int dui;
870 Window dummy;
871
872 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
873}
874
875long
876getstate(Window w) {
877 int format;
878 long result = -1;
879 unsigned char *p = NULL;
880 unsigned long n, extra;
881 Atom real;
882
883 if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
884 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
885 return -1;
886 if(n != 0)
887 result = *p;
888 XFree(p);
889 return result;
890}
891
892Bool
893gettextprop(Window w, Atom atom, char *text, unsigned int size) {
894 char **list = NULL;
895 int n;
896 XTextProperty name;
897
898 if(!text || size == 0)
899 return False;
900 text[0] = '\0';
901 XGetTextProperty(dpy, w, &name, atom);
902 if(!name.nitems)
903 return False;
904 if(name.encoding == XA_STRING)
905 strncpy(text, (char *)name.value, size - 1);
906 else {
907 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
908 strncpy(text, *list, size - 1);
909 XFreeStringList(list);
910 }
911 }
912 text[size - 1] = '\0';
913 XFree(name.value);
914 return True;
915}
916
917void
918grabbuttons(Client *c, Bool focused) {
919 updatenumlockmask();
920 {
921 unsigned int i, j;
922 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
923 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
924 if(focused) {
925 for(i = 0; i < LENGTH(buttons); i++)
926 if(buttons[i].click == ClkClientWin)
927 for(j = 0; j < LENGTH(modifiers); j++)
928 XGrabButton(dpy, buttons[i].button,
929 buttons[i].mask | modifiers[j],
930 c->win, False, BUTTONMASK,
931 GrabModeAsync, GrabModeSync, None, None);
932 }
933 else
934 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
935 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
936 }
937}
938
939void
940grabkeys(void) {
941 updatenumlockmask();
942 {
943 unsigned int i, j;
944 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
945 KeyCode code;
946
947 XUngrabKey(dpy, AnyKey, AnyModifier, root);
948 for(i = 0; i < LENGTH(keys); i++)
949 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
950 for(j = 0; j < LENGTH(modifiers); j++)
951 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
952 True, GrabModeAsync, GrabModeAsync);
953 }
954}
955
956void
957incnmaster(const Arg *arg) {
958 selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
959 arrange(selmon);
960}
961
962#ifdef XINERAMA
963static Bool
964isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
965 while(n--)
966 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
967 && unique[n].width == info->width && unique[n].height == info->height)
968 return False;
969 return True;
970}
971#endif /* XINERAMA */
972
973void
974keypress(XEvent *e) {
975 unsigned int i;
976 KeySym keysym;
977 XKeyEvent *ev;
978
979 ev = &e->xkey;
980 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
981 for(i = 0; i < LENGTH(keys); i++)
982 if(keysym == keys[i].keysym
983 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
984 && keys[i].func)
985 keys[i].func(&(keys[i].arg));
986}
987
988void
989killclient(const Arg *arg) {
990 if(!selmon->sel)
991 return;
992 if(!sendevent(selmon->sel, wmatom[WMDelete])) {
993 XGrabServer(dpy);
994 XSetErrorHandler(xerrordummy);
995 XSetCloseDownMode(dpy, DestroyAll);
996 XKillClient(dpy, selmon->sel->win);
997 XSync(dpy, False);
998 XSetErrorHandler(xerror);
999 XUngrabServer(dpy);
1000 }
1001}
1002
1003void
1004manage(Window w, XWindowAttributes *wa) {
1005 Client *c, *t = NULL;
1006 Window trans = None;
1007 XWindowChanges wc;
1008
1009 c = ecalloc(1, sizeof(Client));
1010 c->win = w;
1011 updatetitle(c);
1012 if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1013 c->mon = t->mon;
1014 c->tags = t->tags;
1015 }
1016 else {
1017 c->mon = selmon;
1018 applyrules(c);
1019 }
1020 /* geometry */
1021 c->x = c->oldx = wa->x;
1022 c->y = c->oldy = wa->y;
1023 c->w = c->oldw = wa->width;
1024 c->h = c->oldh = wa->height;
1025 c->oldbw = wa->border_width;
1026
1027 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1028 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1029 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1030 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1031 c->x = MAX(c->x, c->mon->mx);
1032 /* only fix client y-offset, if the client center might cover the bar */
1033 c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1034 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1035 c->bw = borderpx;
1036
1037 wc.border_width = c->bw;
1038 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1039 XSetWindowBorder(dpy, w, scheme[SchemeNorm].border->pix);
1040 configure(c); /* propagates border_width, if size doesn't change */
1041 updatewindowtype(c);
1042 updatesizehints(c);
1043 updatewmhints(c);
1044 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1045 grabbuttons(c, False);
1046 if(!c->isfloating)
1047 c->isfloating = c->oldstate = trans != None || c->isfixed;
1048 if(c->isfloating)
1049 XRaiseWindow(dpy, c->win);
1050 attach(c);
1051 attachstack(c);
1052 XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1053 (unsigned char *) &(c->win), 1);
1054 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1055 setclientstate(c, NormalState);
1056 if (c->mon == selmon)
1057 unfocus(selmon->sel, False);
1058 c->mon->sel = c;
1059 arrange(c->mon);
1060 XMapWindow(dpy, c->win);
1061 focus(NULL);
1062}
1063
1064void
1065mappingnotify(XEvent *e) {
1066 XMappingEvent *ev = &e->xmapping;
1067
1068 XRefreshKeyboardMapping(ev);
1069 if(ev->request == MappingKeyboard)
1070 grabkeys();
1071}
1072
1073void
1074maprequest(XEvent *e) {
1075 static XWindowAttributes wa;
1076 XMapRequestEvent *ev = &e->xmaprequest;
1077
1078 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1079 return;
1080 if(wa.override_redirect)
1081 return;
1082 if(!wintoclient(ev->window))
1083 manage(ev->window, &wa);
1084}
1085
1086void
1087monocle(Monitor *m) {
1088 unsigned int n = 0;
1089 Client *c;
1090
1091 for(c = m->clients; c; c = c->next)
1092 if(ISVISIBLE(c))
1093 n++;
1094 if(n > 0) /* override layout symbol */
1095 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1096 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1097 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1098}
1099
1100void
1101motionnotify(XEvent *e) {
1102 static Monitor *mon = NULL;
1103 Monitor *m;
1104 XMotionEvent *ev = &e->xmotion;
1105
1106 if(ev->window != root)
1107 return;
1108 if((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1109 unfocus(selmon->sel, True);
1110 selmon = m;
1111 focus(NULL);
1112 }
1113 mon = m;
1114}
1115
1116void
1117movemouse(const Arg *arg) {
1118 int x, y, ocx, ocy, nx, ny;
1119 Client *c;
1120 Monitor *m;
1121 XEvent ev;
1122 Time lasttime = 0;
1123
1124 if(!(c = selmon->sel))
1125 return;
1126 if(c->isfullscreen) /* no support moving fullscreen windows by mouse */
1127 return;
1128 restack(selmon);
1129 ocx = c->x;
1130 ocy = c->y;
1131 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1132 None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1133 return;
1134 if(!getrootptr(&x, &y))
1135 return;
1136 do {
1137 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1138 switch(ev.type) {
1139 case ConfigureRequest:
1140 case Expose:
1141 case MapRequest:
1142 handler[ev.type](&ev);
1143 break;
1144 case MotionNotify:
1145 if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1146 continue;
1147 lasttime = ev.xmotion.time;
1148
1149 nx = ocx + (ev.xmotion.x - x);
1150 ny = ocy + (ev.xmotion.y - y);
1151 if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1152 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1153 if(abs(selmon->wx - nx) < snap)
1154 nx = selmon->wx;
1155 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1156 nx = selmon->wx + selmon->ww - WIDTH(c);
1157 if(abs(selmon->wy - ny) < snap)
1158 ny = selmon->wy;
1159 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1160 ny = selmon->wy + selmon->wh - HEIGHT(c);
1161 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1162 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1163 togglefloating(NULL);
1164 }
1165 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1166 resize(c, nx, ny, c->w, c->h, True);
1167 break;
1168 }
1169 } while(ev.type != ButtonRelease);
1170 XUngrabPointer(dpy, CurrentTime);
1171 if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1172 sendmon(c, m);
1173 selmon = m;
1174 focus(NULL);
1175 }
1176}
1177
1178Client *
1179nexttiled(Client *c) {
1180 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1181 return c;
1182}
1183
1184void
1185pop(Client *c) {
1186 detach(c);
1187 attach(c);
1188 focus(c);
1189 arrange(c->mon);
1190}
1191
1192void
1193propertynotify(XEvent *e) {
1194 Client *c;
1195 Window trans;
1196 XPropertyEvent *ev = &e->xproperty;
1197
1198 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1199 updatestatus();
1200 else if(ev->state == PropertyDelete)
1201 return; /* ignore */
1202 else if((c = wintoclient(ev->window))) {
1203 switch(ev->atom) {
1204 default: break;
1205 case XA_WM_TRANSIENT_FOR:
1206 if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1207 (c->isfloating = (wintoclient(trans)) != NULL))
1208 arrange(c->mon);
1209 break;
1210 case XA_WM_NORMAL_HINTS:
1211 updatesizehints(c);
1212 break;
1213 case XA_WM_HINTS:
1214 updatewmhints(c);
1215 drawbars();
1216 break;
1217 }
1218 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1219 updatetitle(c);
1220 if(c == c->mon->sel)
1221 drawbar(c->mon);
1222 }
1223 if(ev->atom == netatom[NetWMWindowType])
1224 updatewindowtype(c);
1225 }
1226}
1227
1228void
1229quit(const Arg *arg) {
1230 running = False;
1231}
1232
1233Monitor *
1234recttomon(int x, int y, int w, int h) {
1235 Monitor *m, *r = selmon;
1236 int a, area = 0;
1237
1238 for(m = mons; m; m = m->next)
1239 if((a = INTERSECT(x, y, w, h, m)) > area) {
1240 area = a;
1241 r = m;
1242 }
1243 return r;
1244}
1245
1246void
1247resize(Client *c, int x, int y, int w, int h, Bool interact) {
1248 if(applysizehints(c, &x, &y, &w, &h, interact))
1249 resizeclient(c, x, y, w, h);
1250}
1251
1252void
1253resizeclient(Client *c, int x, int y, int w, int h) {
1254 XWindowChanges wc;
1255
1256 c->oldx = c->x; c->x = wc.x = x;
1257 c->oldy = c->y; c->y = wc.y = y;
1258 c->oldw = c->w; c->w = wc.width = w;
1259 c->oldh = c->h; c->h = wc.height = h;
1260 wc.border_width = c->bw;
1261 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1262 configure(c);
1263 XSync(dpy, False);
1264}
1265
1266void
1267resizemouse(const Arg *arg) {
1268 int ocx, ocy, nw, nh;
1269 Client *c;
1270 Monitor *m;
1271 XEvent ev;
1272 Time lasttime = 0;
1273
1274 if(!(c = selmon->sel))
1275 return;
1276 if(c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1277 return;
1278 restack(selmon);
1279 ocx = c->x;
1280 ocy = c->y;
1281 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1282 None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1283 return;
1284 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1285 do {
1286 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1287 switch(ev.type) {
1288 case ConfigureRequest:
1289 case Expose:
1290 case MapRequest:
1291 handler[ev.type](&ev);
1292 break;
1293 case MotionNotify:
1294 if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1295 continue;
1296 lasttime = ev.xmotion.time;
1297
1298 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1299 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1300 if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1301 && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1302 {
1303 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1304 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1305 togglefloating(NULL);
1306 }
1307 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1308 resize(c, c->x, c->y, nw, nh, True);
1309 break;
1310 }
1311 } while(ev.type != ButtonRelease);
1312 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1313 XUngrabPointer(dpy, CurrentTime);
1314 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1315 if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1316 sendmon(c, m);
1317 selmon = m;
1318 focus(NULL);
1319 }
1320}
1321
1322void
1323restack(Monitor *m) {
1324 Client *c;
1325 XEvent ev;
1326 XWindowChanges wc;
1327
1328 drawbar(m);
1329 if(!m->sel)
1330 return;
1331 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1332 XRaiseWindow(dpy, m->sel->win);
1333 if(m->lt[m->sellt]->arrange) {
1334 wc.stack_mode = Below;
1335 wc.sibling = m->barwin;
1336 for(c = m->stack; c; c = c->snext)
1337 if(!c->isfloating && ISVISIBLE(c)) {
1338 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1339 wc.sibling = c->win;
1340 }
1341 }
1342 XSync(dpy, False);
1343 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1344}
1345
1346void
1347run(void) {
1348 XEvent ev;
1349 /* main event loop */
1350 XSync(dpy, False);
1351 while(running && !XNextEvent(dpy, &ev))
1352 if(handler[ev.type])
1353 handler[ev.type](&ev); /* call handler */
1354}
1355
1356void
1357scan(void) {
1358 unsigned int i, num;
1359 Window d1, d2, *wins = NULL;
1360 XWindowAttributes wa;
1361
1362 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1363 for(i = 0; i < num; i++) {
1364 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1365 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1366 continue;
1367 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1368 manage(wins[i], &wa);
1369 }
1370 for(i = 0; i < num; i++) { /* now the transients */
1371 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1372 continue;
1373 if(XGetTransientForHint(dpy, wins[i], &d1)
1374 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1375 manage(wins[i], &wa);
1376 }
1377 if(wins)
1378 XFree(wins);
1379 }
1380}
1381
1382void
1383sendmon(Client *c, Monitor *m) {
1384 if(c->mon == m)
1385 return;
1386 unfocus(c, True);
1387 detach(c);
1388 detachstack(c);
1389 c->mon = m;
1390 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1391 attach(c);
1392 attachstack(c);
1393 focus(NULL);
1394 arrange(NULL);
1395}
1396
1397void
1398setclientstate(Client *c, long state) {
1399 long data[] = { state, None };
1400
1401 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1402 PropModeReplace, (unsigned char *)data, 2);
1403}
1404
1405Bool
1406sendevent(Client *c, Atom proto) {
1407 int n;
1408 Atom *protocols;
1409 Bool exists = False;
1410 XEvent ev;
1411
1412 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1413 while(!exists && n--)
1414 exists = protocols[n] == proto;
1415 XFree(protocols);
1416 }
1417 if(exists) {
1418 ev.type = ClientMessage;
1419 ev.xclient.window = c->win;
1420 ev.xclient.message_type = wmatom[WMProtocols];
1421 ev.xclient.format = 32;
1422 ev.xclient.data.l[0] = proto;
1423 ev.xclient.data.l[1] = CurrentTime;
1424 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1425 }
1426 return exists;
1427}
1428
1429void
1430setfocus(Client *c) {
1431 if(!c->neverfocus) {
1432 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1433 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1434 XA_WINDOW, 32, PropModeReplace,
1435 (unsigned char *) &(c->win), 1);
1436 }
1437 sendevent(c, wmatom[WMTakeFocus]);
1438}
1439
1440void
1441setfullscreen(Client *c, Bool fullscreen) {
1442 if(fullscreen) {
1443 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1444 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1445 c->isfullscreen = True;
1446 c->oldstate = c->isfloating;
1447 c->oldbw = c->bw;
1448 c->bw = 0;
1449 c->isfloating = True;
1450 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1451 XRaiseWindow(dpy, c->win);
1452 }
1453 else {
1454 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1455 PropModeReplace, (unsigned char*)0, 0);
1456 c->isfullscreen = False;
1457 c->isfloating = c->oldstate;
1458 c->bw = c->oldbw;
1459 c->x = c->oldx;
1460 c->y = c->oldy;
1461 c->w = c->oldw;
1462 c->h = c->oldh;
1463 resizeclient(c, c->x, c->y, c->w, c->h);
1464 arrange(c->mon);
1465 }
1466}
1467
1468void
1469setlayout(const Arg *arg) {
1470 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1471 selmon->sellt ^= 1;
1472 if(arg && arg->v)
1473 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1474 strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1475 if(selmon->sel)
1476 arrange(selmon);
1477 else
1478 drawbar(selmon);
1479}
1480
1481/* arg > 1.0 will set mfact absolutly */
1482void
1483setmfact(const Arg *arg) {
1484 float f;
1485
1486 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1487 return;
1488 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1489 if(f < 0.1 || f > 0.9)
1490 return;
1491 selmon->mfact = f;
1492 arrange(selmon);
1493}
1494
1495void
1496setup(void) {
1497 XSetWindowAttributes wa;
1498
1499 /* clean up any zombies immediately */
1500 sigchld(0);
1501
1502 /* init screen */
1503 screen = DefaultScreen(dpy);
1504 sw = DisplayWidth(dpy, screen);
1505 sh = DisplayHeight(dpy, screen);
1506 root = RootWindow(dpy, screen);
1507 drw = drw_create(dpy, screen, root, sw, sh);
1508 drw_load_fonts(drw, fonts, LENGTH(fonts));
1509 if (!drw->fontcount)
1510 die("no fonts could be loaded.\n");
1511 bh = drw->fonts[0]->h + 2;
1512 updategeom();
1513 /* init atoms */
1514 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1515 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1516 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1517 wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1518 netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1519 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1520 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1521 netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1522 netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1523 netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1524 netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1525 netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1526 /* init cursors */
1527 cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1528 cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1529 cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1530 /* init appearance */
1531 scheme[SchemeNorm].border = drw_clr_create(drw, normbordercolor);
1532 scheme[SchemeNorm].bg = drw_clr_create(drw, normbgcolor);
1533 scheme[SchemeNorm].fg = drw_clr_create(drw, normfgcolor);
1534 scheme[SchemeSel].border = drw_clr_create(drw, selbordercolor);
1535 scheme[SchemeSel].bg = drw_clr_create(drw, selbgcolor);
1536 scheme[SchemeSel].fg = drw_clr_create(drw, selfgcolor);
1537 /* init bars */
1538 updatebars();
1539 updatestatus();
1540 /* EWMH support per view */
1541 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1542 PropModeReplace, (unsigned char *) netatom, NetLast);
1543 XDeleteProperty(dpy, root, netatom[NetClientList]);
1544 /* select for events */
1545 wa.cursor = cursor[CurNormal]->cursor;
1546 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask|PointerMotionMask
1547 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1548 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1549 XSelectInput(dpy, root, wa.event_mask);
1550 grabkeys();
1551 focus(NULL);
1552}
1553
1554void
1555showhide(Client *c) {
1556 if(!c)
1557 return;
1558 if(ISVISIBLE(c)) { /* show clients top down */
1559 XMoveWindow(dpy, c->win, c->x, c->y);
1560 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1561 resize(c, c->x, c->y, c->w, c->h, False);
1562 showhide(c->snext);
1563 }
1564 else { /* hide clients bottom up */
1565 showhide(c->snext);
1566 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1567 }
1568}
1569
1570void
1571sigchld(int unused) {
1572 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1573 die("can't install SIGCHLD handler:");
1574 while(0 < waitpid(-1, NULL, WNOHANG));
1575}
1576
1577void
1578spawn(const Arg *arg) {
1579 if(arg->v == dmenucmd)
1580 dmenumon[0] = '0' + selmon->num;
1581 if(fork() == 0) {
1582 if(dpy)
1583 close(ConnectionNumber(dpy));
1584 setsid();
1585 execvp(((char **)arg->v)[0], (char **)arg->v);
1586 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1587 perror(" failed");
1588 exit(EXIT_SUCCESS);
1589 }
1590}
1591
1592void
1593tag(const Arg *arg) {
1594 if(selmon->sel && arg->ui & TAGMASK) {
1595 selmon->sel->tags = arg->ui & TAGMASK;
1596 focus(NULL);
1597 arrange(selmon);
1598 }
1599}
1600
1601void
1602tagmon(const Arg *arg) {
1603 if(!selmon->sel || !mons->next)
1604 return;
1605 sendmon(selmon->sel, dirtomon(arg->i));
1606}
1607
1608void
1609tile(Monitor *m) {
1610 unsigned int i, n, h, mw, my, ty;
1611 Client *c;
1612
1613 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1614 if(n == 0)
1615 return;
1616
1617 if(n > m->nmaster)
1618 mw = m->nmaster ? m->ww * m->mfact : 0;
1619 else
1620 mw = m->ww;
1621 for(i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1622 if(i < m->nmaster) {
1623 h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1624 resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), False);
1625 my += HEIGHT(c);
1626 }
1627 else {
1628 h = (m->wh - ty) / (n - i);
1629 resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), False);
1630 ty += HEIGHT(c);
1631 }
1632}
1633
1634void
1635togglebar(const Arg *arg) {
1636 selmon->showbar = !selmon->showbar;
1637 updatebarpos(selmon);
1638 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1639 arrange(selmon);
1640}
1641
1642void
1643togglefloating(const Arg *arg) {
1644 if(!selmon->sel)
1645 return;
1646 if(selmon->sel->isfullscreen) /* no support for fullscreen windows */
1647 return;
1648 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1649 if(selmon->sel->isfloating)
1650 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1651 selmon->sel->w, selmon->sel->h, False);
1652 arrange(selmon);
1653}
1654
1655void
1656toggletag(const Arg *arg) {
1657 unsigned int newtags;
1658
1659 if(!selmon->sel)
1660 return;
1661 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1662 if(newtags) {
1663 selmon->sel->tags = newtags;
1664 focus(NULL);
1665 arrange(selmon);
1666 }
1667}
1668
1669void
1670toggleview(const Arg *arg) {
1671 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1672
1673 if(newtagset) {
1674 selmon->tagset[selmon->seltags] = newtagset;
1675 focus(NULL);
1676 arrange(selmon);
1677 }
1678}
1679
1680void
1681unfocus(Client *c, Bool setfocus) {
1682 if(!c)
1683 return;
1684 grabbuttons(c, False);
1685 XSetWindowBorder(dpy, c->win, scheme[SchemeNorm].border->pix);
1686 if(setfocus) {
1687 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1688 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1689 }
1690}
1691
1692void
1693unmanage(Client *c, Bool destroyed) {
1694 Monitor *m = c->mon;
1695 XWindowChanges wc;
1696
1697 /* The server grab construct avoids race conditions. */
1698 detach(c);
1699 detachstack(c);
1700 if(!destroyed) {
1701 wc.border_width = c->oldbw;
1702 XGrabServer(dpy);
1703 XSetErrorHandler(xerrordummy);
1704 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1705 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1706 setclientstate(c, WithdrawnState);
1707 XSync(dpy, False);
1708 XSetErrorHandler(xerror);
1709 XUngrabServer(dpy);
1710 }
1711 free(c);
1712 focus(NULL);
1713 updateclientlist();
1714 arrange(m);
1715}
1716
1717void
1718unmapnotify(XEvent *e) {
1719 Client *c;
1720 XUnmapEvent *ev = &e->xunmap;
1721
1722 if((c = wintoclient(ev->window))) {
1723 if(ev->send_event)
1724 setclientstate(c, WithdrawnState);
1725 else
1726 unmanage(c, False);
1727 }
1728}
1729
1730void
1731updatebars(void) {
1732 Monitor *m;
1733 XSetWindowAttributes wa = {
1734 .override_redirect = True,
1735 .background_pixmap = ParentRelative,
1736 .event_mask = ButtonPressMask|ExposureMask
1737 };
1738 for(m = mons; m; m = m->next) {
1739 if (m->barwin)
1740 continue;
1741 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1742 CopyFromParent, DefaultVisual(dpy, screen),
1743 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1744 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
1745 XMapRaised(dpy, m->barwin);
1746 }
1747}
1748
1749void
1750updatebarpos(Monitor *m) {
1751 m->wy = m->my;
1752 m->wh = m->mh;
1753 if(m->showbar) {
1754 m->wh -= bh;
1755 m->by = m->topbar ? m->wy : m->wy + m->wh;
1756 m->wy = m->topbar ? m->wy + bh : m->wy;
1757 }
1758 else
1759 m->by = -bh;
1760}
1761
1762void
1763updateclientlist() {
1764 Client *c;
1765 Monitor *m;
1766
1767 XDeleteProperty(dpy, root, netatom[NetClientList]);
1768 for(m = mons; m; m = m->next)
1769 for(c = m->clients; c; c = c->next)
1770 XChangeProperty(dpy, root, netatom[NetClientList],
1771 XA_WINDOW, 32, PropModeAppend,
1772 (unsigned char *) &(c->win), 1);
1773}
1774
1775Bool
1776updategeom(void) {
1777 Bool dirty = False;
1778
1779#ifdef XINERAMA
1780 if(XineramaIsActive(dpy)) {
1781 int i, j, n, nn;
1782 Client *c;
1783 Monitor *m;
1784 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1785 XineramaScreenInfo *unique = NULL;
1786
1787 for(n = 0, m = mons; m; m = m->next, n++);
1788 /* only consider unique geometries as separate screens */
1789 unique = ecalloc(nn, sizeof(XineramaScreenInfo));
1790 for(i = 0, j = 0; i < nn; i++)
1791 if(isuniquegeom(unique, j, &info[i]))
1792 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1793 XFree(info);
1794 nn = j;
1795 if(n <= nn) {
1796 for(i = 0; i < (nn - n); i++) { /* new monitors available */
1797 for(m = mons; m && m->next; m = m->next);
1798 if(m)
1799 m->next = createmon();
1800 else
1801 mons = createmon();
1802 }
1803 for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1804 if(i >= n
1805 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1806 || unique[i].width != m->mw || unique[i].height != m->mh))
1807 {
1808 dirty = True;
1809 m->num = i;
1810 m->mx = m->wx = unique[i].x_org;
1811 m->my = m->wy = unique[i].y_org;
1812 m->mw = m->ww = unique[i].width;
1813 m->mh = m->wh = unique[i].height;
1814 updatebarpos(m);
1815 }
1816 }
1817 else { /* less monitors available nn < n */
1818 for(i = nn; i < n; i++) {
1819 for(m = mons; m && m->next; m = m->next);
1820 while(m->clients) {
1821 dirty = True;
1822 c = m->clients;
1823 m->clients = c->next;
1824 detachstack(c);
1825 c->mon = mons;
1826 attach(c);
1827 attachstack(c);
1828 }
1829 if(m == selmon)
1830 selmon = mons;
1831 cleanupmon(m);
1832 }
1833 }
1834 free(unique);
1835 }
1836 else
1837#endif /* XINERAMA */
1838 /* default monitor setup */
1839 {
1840 if(!mons)
1841 mons = createmon();
1842 if(mons->mw != sw || mons->mh != sh) {
1843 dirty = True;
1844 mons->mw = mons->ww = sw;
1845 mons->mh = mons->wh = sh;
1846 updatebarpos(mons);
1847 }
1848 }
1849 if(dirty) {
1850 selmon = mons;
1851 selmon = wintomon(root);
1852 }
1853 return dirty;
1854}
1855
1856void
1857updatenumlockmask(void) {
1858 unsigned int i, j;
1859 XModifierKeymap *modmap;
1860
1861 numlockmask = 0;
1862 modmap = XGetModifierMapping(dpy);
1863 for(i = 0; i < 8; i++)
1864 for(j = 0; j < modmap->max_keypermod; j++)
1865 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1866 == XKeysymToKeycode(dpy, XK_Num_Lock))
1867 numlockmask = (1 << i);
1868 XFreeModifiermap(modmap);
1869}
1870
1871void
1872updatesizehints(Client *c) {
1873 long msize;
1874 XSizeHints size;
1875
1876 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1877 /* size is uninitialized, ensure that size.flags aren't used */
1878 size.flags = PSize;
1879 if(size.flags & PBaseSize) {
1880 c->basew = size.base_width;
1881 c->baseh = size.base_height;
1882 }
1883 else if(size.flags & PMinSize) {
1884 c->basew = size.min_width;
1885 c->baseh = size.min_height;
1886 }
1887 else
1888 c->basew = c->baseh = 0;
1889 if(size.flags & PResizeInc) {
1890 c->incw = size.width_inc;
1891 c->inch = size.height_inc;
1892 }
1893 else
1894 c->incw = c->inch = 0;
1895 if(size.flags & PMaxSize) {
1896 c->maxw = size.max_width;
1897 c->maxh = size.max_height;
1898 }
1899 else
1900 c->maxw = c->maxh = 0;
1901 if(size.flags & PMinSize) {
1902 c->minw = size.min_width;
1903 c->minh = size.min_height;
1904 }
1905 else if(size.flags & PBaseSize) {
1906 c->minw = size.base_width;
1907 c->minh = size.base_height;
1908 }
1909 else
1910 c->minw = c->minh = 0;
1911 if(size.flags & PAspect) {
1912 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1913 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1914 }
1915 else
1916 c->maxa = c->mina = 0.0;
1917 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1918 && c->maxw == c->minw && c->maxh == c->minh);
1919}
1920
1921void
1922updatetitle(Client *c) {
1923 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1924 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1925 if(c->name[0] == '\0') /* hack to mark broken clients */
1926 strcpy(c->name, broken);
1927}
1928
1929void
1930updatestatus(void) {
1931 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1932 strcpy(stext, "dwm-"VERSION);
1933 drawbar(selmon);
1934}
1935
1936void
1937updatewindowtype(Client *c) {
1938 Atom state = getatomprop(c, netatom[NetWMState]);
1939 Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
1940
1941 if(state == netatom[NetWMFullscreen])
1942 setfullscreen(c, True);
1943 if(wtype == netatom[NetWMWindowTypeDialog])
1944 c->isfloating = True;
1945}
1946
1947void
1948updatewmhints(Client *c) {
1949 XWMHints *wmh;
1950
1951 if((wmh = XGetWMHints(dpy, c->win))) {
1952 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1953 wmh->flags &= ~XUrgencyHint;
1954 XSetWMHints(dpy, c->win, wmh);
1955 }
1956 else
1957 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1958 if(wmh->flags & InputHint)
1959 c->neverfocus = !wmh->input;
1960 else
1961 c->neverfocus = False;
1962 XFree(wmh);
1963 }
1964}
1965
1966void
1967view(const Arg *arg) {
1968 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1969 return;
1970 selmon->seltags ^= 1; /* toggle sel tagset */
1971 if(arg->ui & TAGMASK)
1972 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1973 focus(NULL);
1974 arrange(selmon);
1975}
1976
1977Client *
1978wintoclient(Window w) {
1979 Client *c;
1980 Monitor *m;
1981
1982 for(m = mons; m; m = m->next)
1983 for(c = m->clients; c; c = c->next)
1984 if(c->win == w)
1985 return c;
1986 return NULL;
1987}
1988
1989Monitor *
1990wintomon(Window w) {
1991 int x, y;
1992 Client *c;
1993 Monitor *m;
1994
1995 if(w == root && getrootptr(&x, &y))
1996 return recttomon(x, y, 1, 1);
1997 for(m = mons; m; m = m->next)
1998 if(w == m->barwin)
1999 return m;
2000 if((c = wintoclient(w)))
2001 return c->mon;
2002 return selmon;
2003}
2004
2005/* There's no way to check accesses to destroyed windows, thus those cases are
2006 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2007 * default error handler, which may call exit. */
2008int
2009xerror(Display *dpy, XErrorEvent *ee) {
2010 if(ee->error_code == BadWindow
2011 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2012 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2013 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2014 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2015 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2016 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2017 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2018 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2019 return 0;
2020 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2021 ee->request_code, ee->error_code);
2022 return xerrorxlib(dpy, ee); /* may call exit */
2023}
2024
2025int
2026xerrordummy(Display *dpy, XErrorEvent *ee) {
2027 return 0;
2028}
2029
2030/* Startup Error handler to check if another window manager
2031 * is already running. */
2032int
2033xerrorstart(Display *dpy, XErrorEvent *ee) {
2034 die("dwm: another window manager is already running\n");
2035 return -1;
2036}
2037
2038void
2039zoom(const Arg *arg) {
2040 Client *c = selmon->sel;
2041
2042 if(!selmon->lt[selmon->sellt]->arrange
2043 || (selmon->sel && selmon->sel->isfloating))
2044 return;
2045 if(c == nexttiled(selmon->clients))
2046 if(!c || !(c = nexttiled(c->next)))
2047 return;
2048 pop(c);
2049}
2050
2051int
2052main(int argc, char *argv[]) {
2053 if(argc == 2 && !strcmp("-v", argv[1]))
2054 die("dwm-"VERSION", © 2006-2015 dwm engineers, see LICENSE for details\n");
2055 else if(argc != 1)
2056 die("usage: dwm [-v]\n");
2057 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2058 fputs("warning: no locale support\n", stderr);
2059 if(!(dpy = XOpenDisplay(NULL)))
2060 die("dwm: cannot open display\n");
2061 checkotherwm();
2062 setup();
2063 scan();
2064 run();
2065 cleanup();
2066 XCloseDisplay(dpy);
2067 return EXIT_SUCCESS;
2068}