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