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[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * The event handlers of dwm are organized in an array which is accessed
10 * whenever a new event has been fetched. This allows event dispatching
11 * in O(1) time.
12 *
13 * Each child of the root window is called a client, except windows which have
14 * set the override_redirect flag. Clients are organized in a linked client
15 * list on each monitor, the focus history is remembered through a stack list
16 * on each monitor. Each client contains a bit array to indicate the tags of a
17 * client.
18 *
19 * Keys and tagging rules are organized as arrays and defined in config.h.
20 *
21 * To understand everything else, start reading main().
22 */
23 #include <errno.h>
24 #include <locale.h>
25 #include <stdarg.h>
26 #include <signal.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <sys/types.h>
32 #include <sys/wait.h>
33 #include <X11/cursorfont.h>
34 #include <X11/keysym.h>
35 #include <X11/Xatom.h>
36 #include <X11/Xlib.h>
37 #include <X11/Xproto.h>
38 #include <X11/Xutil.h>
39 #ifdef XINERAMA
40 #include <X11/extensions/Xinerama.h>
41 #endif /* XINERAMA */
42
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
47 #define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
48 #define LENGTH(X) (sizeof X / sizeof X[0])
49 #define MAX(A, B) ((A) > (B) ? (A) : (B))
50 #define MIN(A, B) ((A) < (B) ? (A) : (B))
51 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
52 #define WIDTH(X) ((X)->w + 2 * (X)->bw)
53 #define HEIGHT(X) ((X)->h + 2 * (X)->bw)
54 #define TAGMASK ((1 << LENGTH(tags)) - 1)
55 #define TEXTW(X) (textnw(X, strlen(X)) + dc.font.height)
56
57 /* enums */
58 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60 enum { NetSupported, NetWMName, NetWMState,
61 NetWMFullscreen, NetActiveWindow, NetLast }; /* EWMH atoms */
62 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
63 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
64 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
65
66 typedef union {
67 int i;
68 unsigned int ui;
69 float f;
70 const void *v;
71 } Arg;
72
73 typedef struct {
74 unsigned int click;
75 unsigned int mask;
76 unsigned int button;
77 void (*func)(const Arg *arg);
78 const Arg arg;
79 } Button;
80
81 typedef struct Monitor Monitor;
82 typedef struct Client Client;
83 struct Client {
84 char name[256];
85 float mina, maxa;
86 int x, y, w, h;
87 int oldx, oldy, oldw, oldh;
88 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
89 int bw, oldbw;
90 unsigned int tags;
91 Bool isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
92 Client *next;
93 Client *snext;
94 Monitor *mon;
95 Window win;
96 };
97
98 typedef struct {
99 int x, y, w, h;
100 unsigned long norm[ColLast];
101 unsigned long sel[ColLast];
102 Drawable drawable;
103 GC gc;
104 struct {
105 int ascent;
106 int descent;
107 int height;
108 XFontSet set;
109 XFontStruct *xfont;
110 } font;
111 } DC; /* draw context */
112
113 typedef struct {
114 unsigned int mod;
115 KeySym keysym;
116 void (*func)(const Arg *);
117 const Arg arg;
118 } Key;
119
120 typedef struct {
121 const char *symbol;
122 void (*arrange)(Monitor *);
123 } Layout;
124
125 struct Monitor {
126 char ltsymbol[16];
127 float mfact;
128 int num;
129 int by; /* bar geometry */
130 int mx, my, mw, mh; /* screen size */
131 int wx, wy, ww, wh; /* window area */
132 unsigned int seltags;
133 unsigned int sellt;
134 unsigned int tagset[2];
135 Bool showbar;
136 Bool topbar;
137 Client *clients;
138 Client *sel;
139 Client *stack;
140 Monitor *next;
141 Window barwin;
142 const Layout *lt[2];
143 };
144
145 typedef struct {
146 const char *class;
147 const char *instance;
148 const char *title;
149 unsigned int tags;
150 Bool isfloating;
151 int monitor;
152 } Rule;
153
154 /* function declarations */
155 static void applyrules(Client *c);
156 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
157 static void arrange(Monitor *m);
158 static void arrangemon(Monitor *m);
159 static void attach(Client *c);
160 static void attachstack(Client *c);
161 static void buttonpress(XEvent *e);
162 static void checkotherwm(void);
163 static void cleanup(void);
164 static void cleanupmon(Monitor *mon);
165 static void clearurgent(Client *c);
166 static void clientmessage(XEvent *e);
167 static void configure(Client *c);
168 static void configurenotify(XEvent *e);
169 static void configurerequest(XEvent *e);
170 static Monitor *createmon(void);
171 static void destroynotify(XEvent *e);
172 static void detach(Client *c);
173 static void detachstack(Client *c);
174 static void die(const char *errstr, ...);
175 static Monitor *dirtomon(int dir);
176 static void drawbar(Monitor *m);
177 static void drawbars(void);
178 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
179 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
180 static void enternotify(XEvent *e);
181 static void expose(XEvent *e);
182 static void focus(Client *c);
183 static void focusin(XEvent *e);
184 static void focusmon(const Arg *arg);
185 static void focusstack(const Arg *arg);
186 static unsigned long getcolor(const char *colstr);
187 static Bool getrootptr(int *x, int *y);
188 static long getstate(Window w);
189 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
190 static void grabbuttons(Client *c, Bool focused);
191 static void grabkeys(void);
192 static void initfont(const char *fontstr);
193 static void keypress(XEvent *e);
194 static void killclient(const Arg *arg);
195 static void manage(Window w, XWindowAttributes *wa);
196 static void mappingnotify(XEvent *e);
197 static void maprequest(XEvent *e);
198 static void monocle(Monitor *m);
199 static void movemouse(const Arg *arg);
200 static Client *nexttiled(Client *c);
201 static void pop(Client *);
202 static void propertynotify(XEvent *e);
203 static Monitor *ptrtomon(int x, int y);
204 static void quit(const Arg *arg);
205 static void resize(Client *c, int x, int y, int w, int h, Bool interact);
206 static void resizeclient(Client *c, int x, int y, int w, int h);
207 static void resizemouse(const Arg *arg);
208 static void restack(Monitor *m);
209 static void run(void);
210 static void scan(void);
211 static Bool sendevent(Client *c, Atom proto);
212 static void sendmon(Client *c, Monitor *m);
213 static void setclientstate(Client *c, long state);
214 static void setfocus(Client *c);
215 static void setlayout(const Arg *arg);
216 static void setmfact(const Arg *arg);
217 static void setup(void);
218 static void showhide(Client *c);
219 static void sigchld(int unused);
220 static void spawn(const Arg *arg);
221 static void tag(const Arg *arg);
222 static void tagmon(const Arg *arg);
223 static int textnw(const char *text, unsigned int len);
224 static void tile(Monitor *);
225 static void togglebar(const Arg *arg);
226 static void togglefloating(const Arg *arg);
227 static void toggletag(const Arg *arg);
228 static void toggleview(const Arg *arg);
229 static void unfocus(Client *c, Bool setfocus);
230 static void unmanage(Client *c, Bool destroyed);
231 static void unmapnotify(XEvent *e);
232 static Bool updategeom(void);
233 static void updatebarpos(Monitor *m);
234 static void updatebars(void);
235 static void updatenumlockmask(void);
236 static void updatesizehints(Client *c);
237 static void updatestatus(void);
238 static void updatetitle(Client *c);
239 static void updatewmhints(Client *c);
240 static void view(const Arg *arg);
241 static Client *wintoclient(Window w);
242 static Monitor *wintomon(Window w);
243 static int xerror(Display *dpy, XErrorEvent *ee);
244 static int xerrordummy(Display *dpy, XErrorEvent *ee);
245 static int xerrorstart(Display *dpy, XErrorEvent *ee);
246 static void zoom(const Arg *arg);
247
248 /* variables */
249 static const char broken[] = "broken";
250 static char stext[256];
251 static int screen;
252 static int sw, sh; /* X display screen geometry width, height */
253 static int bh, blw = 0; /* bar geometry */
254 static int (*xerrorxlib)(Display *, XErrorEvent *);
255 static unsigned int numlockmask = 0;
256 static 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 };
271 static Atom wmatom[WMLast], netatom[NetLast];
272 static Bool running = True;
273 static Cursor cursor[CurLast];
274 static Display *dpy;
275 static DC dc;
276 static Monitor *mons = NULL, *selmon = NULL;
277 static 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. */
283 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
284
285 /* function implementations */
286 void
287 applyrules(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
320 Bool
321 applysizehints(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
386 void
387 arrange(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
399 void
400 arrangemon(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
407 void
408 attach(Client *c) {
409 c->next = c->mon->clients;
410 c->mon->clients = c;
411 }
412
413 void
414 attachstack(Client *c) {
415 c->snext = c->mon->stack;
416 c->mon->stack = c;
417 }
418
419 void
420 buttonpress(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
460 void
461 checkotherwm(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
470 void
471 cleanup(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
497 void
498 cleanupmon(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
512 void
513 clearurgent(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
524 void
525 clientmessage(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
566 void
567 configure(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
584 void
585 configurenotify(XEvent *e) {
586 Monitor *m;
587 XConfigureEvent *ev = &e->xconfigure;
588
589 if(ev->window == root) {
590 sw = ev->width;
591 sh = ev->height;
592 if(updategeom()) {
593 if(dc.drawable != 0)
594 XFreePixmap(dpy, dc.drawable);
595 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
596 updatebars();
597 for(m = mons; m; m = m->next)
598 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
599 arrange(NULL);
600 }
601 }
602 }
603
604 void
605 configurerequest(XEvent *e) {
606 Client *c;
607 Monitor *m;
608 XConfigureRequestEvent *ev = &e->xconfigurerequest;
609 XWindowChanges wc;
610
611 if((c = wintoclient(ev->window))) {
612 if(ev->value_mask & CWBorderWidth)
613 c->bw = ev->border_width;
614 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
615 m = c->mon;
616 if(ev->value_mask & CWX)
617 c->x = m->mx + ev->x;
618 if(ev->value_mask & CWY)
619 c->y = m->my + ev->y;
620 if(ev->value_mask & CWWidth)
621 c->w = ev->width;
622 if(ev->value_mask & CWHeight)
623 c->h = ev->height;
624 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
625 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
626 if((c->y + c->h) > m->my + m->mh && c->isfloating)
627 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
628 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
629 configure(c);
630 if(ISVISIBLE(c))
631 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
632 }
633 else
634 configure(c);
635 }
636 else {
637 wc.x = ev->x;
638 wc.y = ev->y;
639 wc.width = ev->width;
640 wc.height = ev->height;
641 wc.border_width = ev->border_width;
642 wc.sibling = ev->above;
643 wc.stack_mode = ev->detail;
644 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
645 }
646 XSync(dpy, False);
647 }
648
649 Monitor *
650 createmon(void) {
651 Monitor *m;
652
653 if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
654 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
655 m->tagset[0] = m->tagset[1] = 1;
656 m->mfact = mfact;
657 m->showbar = showbar;
658 m->topbar = topbar;
659 m->lt[0] = &layouts[0];
660 m->lt[1] = &layouts[1 % LENGTH(layouts)];
661 strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
662 return m;
663 }
664
665 void
666 destroynotify(XEvent *e) {
667 Client *c;
668 XDestroyWindowEvent *ev = &e->xdestroywindow;
669
670 if((c = wintoclient(ev->window)))
671 unmanage(c, True);
672 }
673
674 void
675 detach(Client *c) {
676 Client **tc;
677
678 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
679 *tc = c->next;
680 }
681
682 void
683 detachstack(Client *c) {
684 Client **tc, *t;
685
686 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
687 *tc = c->snext;
688
689 if(c == c->mon->sel) {
690 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
691 c->mon->sel = t;
692 }
693 }
694
695 void
696 die(const char *errstr, ...) {
697 va_list ap;
698
699 va_start(ap, errstr);
700 vfprintf(stderr, errstr, ap);
701 va_end(ap);
702 exit(EXIT_FAILURE);
703 }
704
705 Monitor *
706 dirtomon(int dir) {
707 Monitor *m = NULL;
708
709 if(dir > 0) {
710 if(!(m = selmon->next))
711 m = mons;
712 }
713 else {
714 if(selmon == mons)
715 for(m = mons; m->next; m = m->next);
716 else
717 for(m = mons; m->next != selmon; m = m->next);
718 }
719 return m;
720 }
721
722 void
723 drawbar(Monitor *m) {
724 int x;
725 unsigned int i, occ = 0, urg = 0;
726 unsigned long *col;
727 Client *c;
728
729 for(c = m->clients; c; c = c->next) {
730 occ |= c->tags;
731 if(c->isurgent)
732 urg |= c->tags;
733 }
734 dc.x = 0;
735 for(i = 0; i < LENGTH(tags); i++) {
736 dc.w = TEXTW(tags[i]);
737 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
738 drawtext(tags[i], col, urg & 1 << i);
739 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
740 occ & 1 << i, urg & 1 << i, col);
741 dc.x += dc.w;
742 }
743 dc.w = blw = TEXTW(m->ltsymbol);
744 drawtext(m->ltsymbol, dc.norm, False);
745 dc.x += dc.w;
746 x = dc.x;
747 if(m == selmon) { /* status is only drawn on selected monitor */
748 dc.w = TEXTW(stext);
749 dc.x = m->ww - dc.w;
750 if(dc.x < x) {
751 dc.x = x;
752 dc.w = m->ww - x;
753 }
754 drawtext(stext, dc.norm, False);
755 }
756 else
757 dc.x = m->ww;
758 if((dc.w = dc.x - x) > bh) {
759 dc.x = x;
760 if(m->sel) {
761 col = m == selmon ? dc.sel : dc.norm;
762 drawtext(m->sel->name, col, False);
763 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
764 }
765 else
766 drawtext(NULL, dc.norm, False);
767 }
768 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
769 XSync(dpy, False);
770 }
771
772 void
773 drawbars(void) {
774 Monitor *m;
775
776 for(m = mons; m; m = m->next)
777 drawbar(m);
778 }
779
780 void
781 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
782 int x;
783
784 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
785 x = (dc.font.ascent + dc.font.descent + 2) / 4;
786 if(filled)
787 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x+1, x+1);
788 else if(empty)
789 XDrawRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x, x);
790 }
791
792 void
793 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
794 char buf[256];
795 int i, x, y, h, len, olen;
796
797 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
798 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x, dc.y, dc.w, dc.h);
799 if(!text)
800 return;
801 olen = strlen(text);
802 h = dc.font.ascent + dc.font.descent;
803 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
804 x = dc.x + (h / 2);
805 /* shorten text if necessary */
806 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
807 if(!len)
808 return;
809 memcpy(buf, text, len);
810 if(len < olen)
811 for(i = len; i && i > len - 3; buf[--i] = '.');
812 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
813 if(dc.font.set)
814 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
815 else
816 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
817 }
818
819 void
820 enternotify(XEvent *e) {
821 Monitor *m;
822 XCrossingEvent *ev = &e->xcrossing;
823
824 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
825 return;
826 if((m = wintomon(ev->window)) && m != selmon) {
827 unfocus(selmon->sel, True);
828 selmon = m;
829 }
830 focus((wintoclient(ev->window)));
831 }
832
833 void
834 expose(XEvent *e) {
835 Monitor *m;
836 XExposeEvent *ev = &e->xexpose;
837
838 if(ev->count == 0 && (m = wintomon(ev->window)))
839 drawbar(m);
840 }
841
842 void
843 focus(Client *c) {
844 if(!c || !ISVISIBLE(c))
845 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
846 /* was if(selmon->sel) */
847 if(selmon->sel && selmon->sel != c)
848 unfocus(selmon->sel, False);
849 if(c) {
850 if(c->mon != selmon)
851 selmon = c->mon;
852 if(c->isurgent)
853 clearurgent(c);
854 detachstack(c);
855 attachstack(c);
856 grabbuttons(c, True);
857 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
858 setfocus(c);
859 }
860 else
861 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
862 selmon->sel = c;
863 drawbars();
864 }
865
866 void
867 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
868 XFocusChangeEvent *ev = &e->xfocus;
869
870 if(selmon->sel && ev->window != selmon->sel->win)
871 setfocus(selmon->sel);
872 }
873
874 void
875 focusmon(const Arg *arg) {
876 Monitor *m;
877
878 if(!mons->next)
879 return;
880 if((m = dirtomon(arg->i)) == selmon)
881 return;
882 unfocus(selmon->sel, True);
883 selmon = m;
884 focus(NULL);
885 }
886
887 void
888 focusstack(const Arg *arg) {
889 Client *c = NULL, *i;
890
891 if(!selmon->sel)
892 return;
893 if(arg->i > 0) {
894 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
895 if(!c)
896 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
897 }
898 else {
899 for(i = selmon->clients; i != selmon->sel; i = i->next)
900 if(ISVISIBLE(i))
901 c = i;
902 if(!c)
903 for(; i; i = i->next)
904 if(ISVISIBLE(i))
905 c = i;
906 }
907 if(c) {
908 focus(c);
909 restack(selmon);
910 }
911 }
912
913 unsigned long
914 getcolor(const char *colstr) {
915 Colormap cmap = DefaultColormap(dpy, screen);
916 XColor color;
917
918 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
919 die("error, cannot allocate color '%s'\n", colstr);
920 return color.pixel;
921 }
922
923 Bool
924 getrootptr(int *x, int *y) {
925 int di;
926 unsigned int dui;
927 Window dummy;
928
929 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
930 }
931
932 long
933 getstate(Window w) {
934 int format;
935 long result = -1;
936 unsigned char *p = NULL;
937 unsigned long n, extra;
938 Atom real;
939
940 if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
941 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
942 return -1;
943 if(n != 0)
944 result = *p;
945 XFree(p);
946 return result;
947 }
948
949 Bool
950 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
951 char **list = NULL;
952 int n;
953 XTextProperty name;
954
955 if(!text || size == 0)
956 return False;
957 text[0] = '\0';
958 XGetTextProperty(dpy, w, &name, atom);
959 if(!name.nitems)
960 return False;
961 if(name.encoding == XA_STRING)
962 strncpy(text, (char *)name.value, size - 1);
963 else {
964 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
965 strncpy(text, *list, size - 1);
966 XFreeStringList(list);
967 }
968 }
969 text[size - 1] = '\0';
970 XFree(name.value);
971 return True;
972 }
973
974 void
975 grabbuttons(Client *c, Bool focused) {
976 updatenumlockmask();
977 {
978 unsigned int i, j;
979 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
980 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
981 if(focused) {
982 for(i = 0; i < LENGTH(buttons); i++)
983 if(buttons[i].click == ClkClientWin)
984 for(j = 0; j < LENGTH(modifiers); j++)
985 XGrabButton(dpy, buttons[i].button,
986 buttons[i].mask | modifiers[j],
987 c->win, False, BUTTONMASK,
988 GrabModeAsync, GrabModeSync, None, None);
989 }
990 else
991 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
992 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
993 }
994 }
995
996 void
997 grabkeys(void) {
998 updatenumlockmask();
999 {
1000 unsigned int i, j;
1001 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1002 KeyCode code;
1003
1004 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1005 for(i = 0; i < LENGTH(keys); i++) {
1006 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1007 for(j = 0; j < LENGTH(modifiers); j++)
1008 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1009 True, GrabModeAsync, GrabModeAsync);
1010 }
1011 }
1012 }
1013
1014 void
1015 initfont(const char *fontstr) {
1016 char *def, **missing;
1017 int n;
1018
1019 missing = NULL;
1020 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
1021 if(missing) {
1022 while(n--)
1023 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
1024 XFreeStringList(missing);
1025 }
1026 if(dc.font.set) {
1027 XFontStruct **xfonts;
1028 char **font_names;
1029
1030 dc.font.ascent = dc.font.descent = 0;
1031 XExtentsOfFontSet(dc.font.set);
1032 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
1033 while(n--) {
1034 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
1035 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
1036 xfonts++;
1037 }
1038 }
1039 else {
1040 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
1041 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
1042 die("error, cannot load font: '%s'\n", fontstr);
1043 dc.font.ascent = dc.font.xfont->ascent;
1044 dc.font.descent = dc.font.xfont->descent;
1045 }
1046 dc.font.height = dc.font.ascent + dc.font.descent;
1047 }
1048
1049 #ifdef XINERAMA
1050 static Bool
1051 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1052 while(n--)
1053 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1054 && unique[n].width == info->width && unique[n].height == info->height)
1055 return False;
1056 return True;
1057 }
1058 #endif /* XINERAMA */
1059
1060 void
1061 keypress(XEvent *e) {
1062 unsigned int i;
1063 KeySym keysym;
1064 XKeyEvent *ev;
1065
1066 ev = &e->xkey;
1067 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1068 for(i = 0; i < LENGTH(keys); i++)
1069 if(keysym == keys[i].keysym
1070 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1071 && keys[i].func)
1072 keys[i].func(&(keys[i].arg));
1073 }
1074
1075 void
1076 killclient(const Arg *arg) {
1077 if(!selmon->sel)
1078 return;
1079 if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1080 XGrabServer(dpy);
1081 XSetErrorHandler(xerrordummy);
1082 XSetCloseDownMode(dpy, DestroyAll);
1083 XKillClient(dpy, selmon->sel->win);
1084 XSync(dpy, False);
1085 XSetErrorHandler(xerror);
1086 XUngrabServer(dpy);
1087 }
1088 }
1089
1090 void
1091 manage(Window w, XWindowAttributes *wa) {
1092 Client *c, *t = NULL;
1093 Window trans = None;
1094 XWindowChanges wc;
1095
1096 if(!(c = calloc(1, sizeof(Client))))
1097 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1098 c->win = w;
1099 updatetitle(c);
1100 if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1101 c->mon = t->mon;
1102 c->tags = t->tags;
1103 }
1104 else {
1105 c->mon = selmon;
1106 applyrules(c);
1107 }
1108 /* geometry */
1109 c->x = c->oldx = wa->x + c->mon->wx;
1110 c->y = c->oldy = wa->y + c->mon->wy;
1111 c->w = c->oldw = wa->width;
1112 c->h = c->oldh = wa->height;
1113 c->oldbw = wa->border_width;
1114 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1115 c->isfloating = True;
1116 c->x = c->mon->mx;
1117 c->y = c->mon->my;
1118 c->bw = 0;
1119 }
1120 else {
1121 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1122 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1123 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1124 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1125 c->x = MAX(c->x, c->mon->mx);
1126 /* only fix client y-offset, if the client center might cover the bar */
1127 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1128 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1129 c->bw = borderpx;
1130 }
1131 wc.border_width = c->bw;
1132 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1133 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1134 configure(c); /* propagates border_width, if size doesn't change */
1135 updatesizehints(c);
1136 updatewmhints(c);
1137 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1138 grabbuttons(c, False);
1139 if(!c->isfloating)
1140 c->isfloating = c->oldstate = trans != None || c->isfixed;
1141 if(c->isfloating)
1142 XRaiseWindow(dpy, c->win);
1143 attach(c);
1144 attachstack(c);
1145 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1146 XMapWindow(dpy, c->win);
1147 setclientstate(c, NormalState);
1148 arrange(c->mon);
1149 }
1150
1151 void
1152 mappingnotify(XEvent *e) {
1153 XMappingEvent *ev = &e->xmapping;
1154
1155 XRefreshKeyboardMapping(ev);
1156 if(ev->request == MappingKeyboard)
1157 grabkeys();
1158 }
1159
1160 void
1161 maprequest(XEvent *e) {
1162 static XWindowAttributes wa;
1163 XMapRequestEvent *ev = &e->xmaprequest;
1164
1165 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1166 return;
1167 if(wa.override_redirect)
1168 return;
1169 if(!wintoclient(ev->window))
1170 manage(ev->window, &wa);
1171 }
1172
1173 void
1174 monocle(Monitor *m) {
1175 unsigned int n = 0;
1176 Client *c;
1177
1178 for(c = m->clients; c; c = c->next)
1179 if(ISVISIBLE(c))
1180 n++;
1181 if(n > 0) /* override layout symbol */
1182 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1183 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1184 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1185 }
1186
1187 void
1188 movemouse(const Arg *arg) {
1189 int x, y, ocx, ocy, nx, ny;
1190 Client *c;
1191 Monitor *m;
1192 XEvent ev;
1193
1194 if(!(c = selmon->sel))
1195 return;
1196 restack(selmon);
1197 ocx = c->x;
1198 ocy = c->y;
1199 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1200 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1201 return;
1202 if(!getrootptr(&x, &y))
1203 return;
1204 do {
1205 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1206 switch(ev.type) {
1207 case ConfigureRequest:
1208 case Expose:
1209 case MapRequest:
1210 handler[ev.type](&ev);
1211 break;
1212 case MotionNotify:
1213 nx = ocx + (ev.xmotion.x - x);
1214 ny = ocy + (ev.xmotion.y - y);
1215 if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1216 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1217 if(abs(selmon->wx - nx) < snap)
1218 nx = selmon->wx;
1219 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1220 nx = selmon->wx + selmon->ww - WIDTH(c);
1221 if(abs(selmon->wy - ny) < snap)
1222 ny = selmon->wy;
1223 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1224 ny = selmon->wy + selmon->wh - HEIGHT(c);
1225 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1226 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1227 togglefloating(NULL);
1228 }
1229 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1230 resize(c, nx, ny, c->w, c->h, True);
1231 break;
1232 }
1233 } while(ev.type != ButtonRelease);
1234 XUngrabPointer(dpy, CurrentTime);
1235 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1236 sendmon(c, m);
1237 selmon = m;
1238 focus(NULL);
1239 }
1240 }
1241
1242 Client *
1243 nexttiled(Client *c) {
1244 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1245 return c;
1246 }
1247
1248 void
1249 pop(Client *c) {
1250 detach(c);
1251 attach(c);
1252 focus(c);
1253 arrange(c->mon);
1254 }
1255
1256 void
1257 propertynotify(XEvent *e) {
1258 Client *c;
1259 Window trans;
1260 XPropertyEvent *ev = &e->xproperty;
1261
1262 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1263 updatestatus();
1264 else if(ev->state == PropertyDelete)
1265 return; /* ignore */
1266 else if((c = wintoclient(ev->window))) {
1267 switch(ev->atom) {
1268 default: break;
1269 case XA_WM_TRANSIENT_FOR:
1270 if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1271 (c->isfloating = (wintoclient(trans)) != NULL))
1272 arrange(c->mon);
1273 break;
1274 case XA_WM_NORMAL_HINTS:
1275 updatesizehints(c);
1276 break;
1277 case XA_WM_HINTS:
1278 updatewmhints(c);
1279 drawbars();
1280 break;
1281 }
1282 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1283 updatetitle(c);
1284 if(c == c->mon->sel)
1285 drawbar(c->mon);
1286 }
1287 }
1288 }
1289
1290 Monitor *
1291 ptrtomon(int x, int y) {
1292 Monitor *m;
1293
1294 for(m = mons; m; m = m->next)
1295 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1296 return m;
1297 return selmon;
1298 }
1299 void
1300 quit(const Arg *arg) {
1301 running = False;
1302 }
1303
1304 void
1305 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1306 if(applysizehints(c, &x, &y, &w, &h, interact))
1307 resizeclient(c, x, y, w, h);
1308 }
1309
1310 void
1311 resizeclient(Client *c, int x, int y, int w, int h) {
1312 XWindowChanges wc;
1313
1314 c->oldx = c->x; c->x = wc.x = x;
1315 c->oldy = c->y; c->y = wc.y = y;
1316 c->oldw = c->w; c->w = wc.width = w;
1317 c->oldh = c->h; c->h = wc.height = h;
1318 wc.border_width = c->bw;
1319 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1320 configure(c);
1321 XSync(dpy, False);
1322 }
1323
1324 void
1325 resizemouse(const Arg *arg) {
1326 int ocx, ocy;
1327 int nw, nh;
1328 Client *c;
1329 Monitor *m;
1330 XEvent ev;
1331
1332 if(!(c = selmon->sel))
1333 return;
1334 restack(selmon);
1335 ocx = c->x;
1336 ocy = c->y;
1337 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1338 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1339 return;
1340 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1341 do {
1342 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1343 switch(ev.type) {
1344 case ConfigureRequest:
1345 case Expose:
1346 case MapRequest:
1347 handler[ev.type](&ev);
1348 break;
1349 case MotionNotify:
1350 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1351 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1352 if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1353 && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1354 {
1355 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1356 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1357 togglefloating(NULL);
1358 }
1359 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1360 resize(c, c->x, c->y, nw, nh, True);
1361 break;
1362 }
1363 } while(ev.type != ButtonRelease);
1364 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1365 XUngrabPointer(dpy, CurrentTime);
1366 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1367 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1368 sendmon(c, m);
1369 selmon = m;
1370 focus(NULL);
1371 }
1372 }
1373
1374 void
1375 restack(Monitor *m) {
1376 Client *c;
1377 XEvent ev;
1378 XWindowChanges wc;
1379
1380 drawbar(m);
1381 if(!m->sel)
1382 return;
1383 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1384 XRaiseWindow(dpy, m->sel->win);
1385 if(m->lt[m->sellt]->arrange) {
1386 wc.stack_mode = Below;
1387 wc.sibling = m->barwin;
1388 for(c = m->stack; c; c = c->snext)
1389 if(!c->isfloating && ISVISIBLE(c)) {
1390 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1391 wc.sibling = c->win;
1392 }
1393 }
1394 XSync(dpy, False);
1395 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1396 }
1397
1398 void
1399 run(void) {
1400 XEvent ev;
1401 /* main event loop */
1402 XSync(dpy, False);
1403 while(running && !XNextEvent(dpy, &ev)) {
1404 if(handler[ev.type])
1405 handler[ev.type](&ev); /* call handler */
1406 }
1407 }
1408
1409 void
1410 scan(void) {
1411 unsigned int i, num;
1412 Window d1, d2, *wins = NULL;
1413 XWindowAttributes wa;
1414
1415 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1416 for(i = 0; i < num; i++) {
1417 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1418 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1419 continue;
1420 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1421 manage(wins[i], &wa);
1422 }
1423 for(i = 0; i < num; i++) { /* now the transients */
1424 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1425 continue;
1426 if(XGetTransientForHint(dpy, wins[i], &d1)
1427 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1428 manage(wins[i], &wa);
1429 }
1430 if(wins)
1431 XFree(wins);
1432 }
1433 }
1434
1435 void
1436 sendmon(Client *c, Monitor *m) {
1437 if(c->mon == m)
1438 return;
1439 unfocus(c, True);
1440 detach(c);
1441 detachstack(c);
1442 c->mon = m;
1443 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1444 attach(c);
1445 attachstack(c);
1446 focus(NULL);
1447 arrange(NULL);
1448 }
1449
1450 void
1451 setclientstate(Client *c, long state) {
1452 long data[] = { state, None };
1453
1454 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1455 PropModeReplace, (unsigned char *)data, 2);
1456 }
1457
1458 Bool
1459 sendevent(Client *c, Atom proto) {
1460 int n;
1461 Atom *protocols;
1462 Bool exists = False;
1463 XEvent ev;
1464
1465 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1466 while(!exists && n--)
1467 exists = protocols[n] == proto;
1468 XFree(protocols);
1469 }
1470 if(exists) {
1471 ev.type = ClientMessage;
1472 ev.xclient.window = c->win;
1473 ev.xclient.message_type = wmatom[WMProtocols];
1474 ev.xclient.format = 32;
1475 ev.xclient.data.l[0] = proto;
1476 ev.xclient.data.l[1] = CurrentTime;
1477 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1478 }
1479 return exists;
1480 }
1481
1482 void
1483 setfocus(Client *c) {
1484 if(!c->neverfocus)
1485 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1486 sendevent(c, wmatom[WMTakeFocus]);
1487 }
1488
1489 void
1490 setlayout(const Arg *arg) {
1491 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1492 selmon->sellt ^= 1;
1493 if(arg && arg->v)
1494 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1495 strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1496 if(selmon->sel)
1497 arrange(selmon);
1498 else
1499 drawbar(selmon);
1500 }
1501
1502 /* arg > 1.0 will set mfact absolutly */
1503 void
1504 setmfact(const Arg *arg) {
1505 float f;
1506
1507 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1508 return;
1509 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1510 if(f < 0.1 || f > 0.9)
1511 return;
1512 selmon->mfact = f;
1513 arrange(selmon);
1514 }
1515
1516 void
1517 setup(void) {
1518 XSetWindowAttributes wa;
1519
1520 /* clean up any zombies immediately */
1521 sigchld(0);
1522
1523 /* init screen */
1524 screen = DefaultScreen(dpy);
1525 root = RootWindow(dpy, screen);
1526 initfont(font);
1527 sw = DisplayWidth(dpy, screen);
1528 sh = DisplayHeight(dpy, screen);
1529 bh = dc.h = dc.font.height + 2;
1530 updategeom();
1531 /* init atoms */
1532 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1533 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1534 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1535 wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1536 netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1537 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1538 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1539 netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1540 netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1541 /* init cursors */
1542 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1543 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1544 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1545 /* init appearance */
1546 dc.norm[ColBorder] = getcolor(normbordercolor);
1547 dc.norm[ColBG] = getcolor(normbgcolor);
1548 dc.norm[ColFG] = getcolor(normfgcolor);
1549 dc.sel[ColBorder] = getcolor(selbordercolor);
1550 dc.sel[ColBG] = getcolor(selbgcolor);
1551 dc.sel[ColFG] = getcolor(selfgcolor);
1552 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1553 dc.gc = XCreateGC(dpy, root, 0, NULL);
1554 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1555 if(!dc.font.set)
1556 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1557 /* init bars */
1558 updatebars();
1559 updatestatus();
1560 /* EWMH support per view */
1561 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1562 PropModeReplace, (unsigned char *) netatom, NetLast);
1563 /* select for events */
1564 wa.cursor = cursor[CurNormal];
1565 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1566 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1567 |PropertyChangeMask;
1568 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1569 XSelectInput(dpy, root, wa.event_mask);
1570 grabkeys();
1571 }
1572
1573 void
1574 showhide(Client *c) {
1575 if(!c)
1576 return;
1577 if(ISVISIBLE(c)) { /* show clients top down */
1578 XMoveWindow(dpy, c->win, c->x, c->y);
1579 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1580 resize(c, c->x, c->y, c->w, c->h, False);
1581 showhide(c->snext);
1582 }
1583 else { /* hide clients bottom up */
1584 showhide(c->snext);
1585 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1586 }
1587 }
1588
1589 void
1590 sigchld(int unused) {
1591 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1592 die("Can't install SIGCHLD handler");
1593 while(0 < waitpid(-1, NULL, WNOHANG));
1594 }
1595
1596 void
1597 spawn(const Arg *arg) {
1598 if(fork() == 0) {
1599 if(dpy)
1600 close(ConnectionNumber(dpy));
1601 setsid();
1602 execvp(((char **)arg->v)[0], (char **)arg->v);
1603 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1604 perror(" failed");
1605 exit(EXIT_SUCCESS);
1606 }
1607 }
1608
1609 void
1610 tag(const Arg *arg) {
1611 if(selmon->sel && arg->ui & TAGMASK) {
1612 selmon->sel->tags = arg->ui & TAGMASK;
1613 arrange(selmon);
1614 }
1615 }
1616
1617 void
1618 tagmon(const Arg *arg) {
1619 if(!selmon->sel || !mons->next)
1620 return;
1621 sendmon(selmon->sel, dirtomon(arg->i));
1622 }
1623
1624 int
1625 textnw(const char *text, unsigned int len) {
1626 XRectangle r;
1627
1628 if(dc.font.set) {
1629 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1630 return r.width;
1631 }
1632 return XTextWidth(dc.font.xfont, text, len);
1633 }
1634
1635 void
1636 tile(Monitor *m) {
1637 int x, y, h, w, mw;
1638 unsigned int i, n;
1639 Client *c;
1640
1641 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1642 if(n == 0)
1643 return;
1644 /* master */
1645 c = nexttiled(m->clients);
1646 mw = m->mfact * m->ww;
1647 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1648 if(--n == 0)
1649 return;
1650 /* tile stack */
1651 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1652 y = m->wy;
1653 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1654 h = m->wh / n;
1655 if(h < bh)
1656 h = m->wh;
1657 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1658 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1659 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1660 if(h != m->wh)
1661 y = c->y + HEIGHT(c);
1662 }
1663 }
1664
1665 void
1666 togglebar(const Arg *arg) {
1667 selmon->showbar = !selmon->showbar;
1668 updatebarpos(selmon);
1669 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1670 arrange(selmon);
1671 }
1672
1673 void
1674 togglefloating(const Arg *arg) {
1675 if(!selmon->sel)
1676 return;
1677 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1678 if(selmon->sel->isfloating)
1679 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1680 selmon->sel->w, selmon->sel->h, False);
1681 arrange(selmon);
1682 }
1683
1684 void
1685 toggletag(const Arg *arg) {
1686 unsigned int newtags;
1687
1688 if(!selmon->sel)
1689 return;
1690 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1691 if(newtags) {
1692 selmon->sel->tags = newtags;
1693 arrange(selmon);
1694 }
1695 }
1696
1697 void
1698 toggleview(const Arg *arg) {
1699 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1700
1701 if(newtagset) {
1702 selmon->tagset[selmon->seltags] = newtagset;
1703 arrange(selmon);
1704 }
1705 }
1706
1707 void
1708 unfocus(Client *c, Bool setfocus) {
1709 if(!c)
1710 return;
1711 grabbuttons(c, False);
1712 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1713 if(setfocus)
1714 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1715 }
1716
1717 void
1718 unmanage(Client *c, Bool destroyed) {
1719 Monitor *m = c->mon;
1720 XWindowChanges wc;
1721
1722 /* The server grab construct avoids race conditions. */
1723 detach(c);
1724 detachstack(c);
1725 if(!destroyed) {
1726 wc.border_width = c->oldbw;
1727 XGrabServer(dpy);
1728 XSetErrorHandler(xerrordummy);
1729 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1730 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1731 setclientstate(c, WithdrawnState);
1732 XSync(dpy, False);
1733 XSetErrorHandler(xerror);
1734 XUngrabServer(dpy);
1735 }
1736 free(c);
1737 focus(NULL);
1738 arrange(m);
1739 }
1740
1741 void
1742 unmapnotify(XEvent *e) {
1743 Client *c;
1744 XUnmapEvent *ev = &e->xunmap;
1745
1746 if((c = wintoclient(ev->window)))
1747 unmanage(c, False);
1748 }
1749
1750 void
1751 updatebars(void) {
1752 Monitor *m;
1753 XSetWindowAttributes wa = {
1754 .override_redirect = True,
1755 .background_pixmap = ParentRelative,
1756 .event_mask = ButtonPressMask|ExposureMask
1757 };
1758 for(m = mons; m; m = m->next) {
1759 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1760 CopyFromParent, DefaultVisual(dpy, screen),
1761 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1762 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1763 XMapRaised(dpy, m->barwin);
1764 }
1765 }
1766
1767 void
1768 updatebarpos(Monitor *m) {
1769 m->wy = m->my;
1770 m->wh = m->mh;
1771 if(m->showbar) {
1772 m->wh -= bh;
1773 m->by = m->topbar ? m->wy : m->wy + m->wh;
1774 m->wy = m->topbar ? m->wy + bh : m->wy;
1775 }
1776 else
1777 m->by = -bh;
1778 }
1779
1780 Bool
1781 updategeom(void) {
1782 Bool dirty = False;
1783
1784 #ifdef XINERAMA
1785 if(XineramaIsActive(dpy)) {
1786 int i, j, n, nn;
1787 Client *c;
1788 Monitor *m;
1789 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1790 XineramaScreenInfo *unique = NULL;
1791
1792 for(n = 0, m = mons; m; m = m->next, n++);
1793 /* only consider unique geometries as separate screens */
1794 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
1795 die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
1796 for(i = 0, j = 0; i < nn; i++)
1797 if(isuniquegeom(unique, j, &info[i]))
1798 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1799 XFree(info);
1800 nn = j;
1801 if(n <= nn) {
1802 for(i = 0; i < (nn - n); i++) { /* new monitors available */
1803 for(m = mons; m && m->next; m = m->next);
1804 if(m)
1805 m->next = createmon();
1806 else
1807 mons = createmon();
1808 }
1809 for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1810 if(i >= n
1811 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1812 || unique[i].width != m->mw || unique[i].height != m->mh))
1813 {
1814 dirty = True;
1815 m->num = i;
1816 m->mx = m->wx = unique[i].x_org;
1817 m->my = m->wy = unique[i].y_org;
1818 m->mw = m->ww = unique[i].width;
1819 m->mh = m->wh = unique[i].height;
1820 updatebarpos(m);
1821 }
1822 }
1823 else { /* less monitors available nn < n */
1824 for(i = nn; i < n; i++) {
1825 for(m = mons; m && m->next; m = m->next);
1826 while(m->clients) {
1827 dirty = True;
1828 c = m->clients;
1829 m->clients = c->next;
1830 detachstack(c);
1831 c->mon = mons;
1832 attach(c);
1833 attachstack(c);
1834 }
1835 if(m == selmon)
1836 selmon = mons;
1837 cleanupmon(m);
1838 }
1839 }
1840 free(unique);
1841 }
1842 else
1843 #endif /* XINERAMA */
1844 /* default monitor setup */
1845 {
1846 if(!mons)
1847 mons = createmon();
1848 if(mons->mw != sw || mons->mh != sh) {
1849 dirty = True;
1850 mons->mw = mons->ww = sw;
1851 mons->mh = mons->wh = sh;
1852 updatebarpos(mons);
1853 }
1854 }
1855 if(dirty) {
1856 selmon = mons;
1857 selmon = wintomon(root);
1858 }
1859 return dirty;
1860 }
1861
1862 void
1863 updatenumlockmask(void) {
1864 unsigned int i, j;
1865 XModifierKeymap *modmap;
1866
1867 numlockmask = 0;
1868 modmap = XGetModifierMapping(dpy);
1869 for(i = 0; i < 8; i++)
1870 for(j = 0; j < modmap->max_keypermod; j++)
1871 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1872 == XKeysymToKeycode(dpy, XK_Num_Lock))
1873 numlockmask = (1 << i);
1874 XFreeModifiermap(modmap);
1875 }
1876
1877 void
1878 updatesizehints(Client *c) {
1879 long msize;
1880 XSizeHints size;
1881
1882 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1883 /* size is uninitialized, ensure that size.flags aren't used */
1884 size.flags = PSize;
1885 if(size.flags & PBaseSize) {
1886 c->basew = size.base_width;
1887 c->baseh = size.base_height;
1888 }
1889 else if(size.flags & PMinSize) {
1890 c->basew = size.min_width;
1891 c->baseh = size.min_height;
1892 }
1893 else
1894 c->basew = c->baseh = 0;
1895 if(size.flags & PResizeInc) {
1896 c->incw = size.width_inc;
1897 c->inch = size.height_inc;
1898 }
1899 else
1900 c->incw = c->inch = 0;
1901 if(size.flags & PMaxSize) {
1902 c->maxw = size.max_width;
1903 c->maxh = size.max_height;
1904 }
1905 else
1906 c->maxw = c->maxh = 0;
1907 if(size.flags & PMinSize) {
1908 c->minw = size.min_width;
1909 c->minh = size.min_height;
1910 }
1911 else if(size.flags & PBaseSize) {
1912 c->minw = size.base_width;
1913 c->minh = size.base_height;
1914 }
1915 else
1916 c->minw = c->minh = 0;
1917 if(size.flags & PAspect) {
1918 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1919 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1920 }
1921 else
1922 c->maxa = c->mina = 0.0;
1923 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1924 && c->maxw == c->minw && c->maxh == c->minh);
1925 }
1926
1927 void
1928 updatetitle(Client *c) {
1929 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1930 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1931 if(c->name[0] == '\0') /* hack to mark broken clients */
1932 strcpy(c->name, broken);
1933 }
1934
1935 void
1936 updatestatus(void) {
1937 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1938 strcpy(stext, "dwm-"VERSION);
1939 drawbar(selmon);
1940 }
1941
1942 void
1943 updatewmhints(Client *c) {
1944 XWMHints *wmh;
1945
1946 if((wmh = XGetWMHints(dpy, c->win))) {
1947 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1948 wmh->flags &= ~XUrgencyHint;
1949 XSetWMHints(dpy, c->win, wmh);
1950 }
1951 else
1952 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1953 if(wmh->flags & InputHint)
1954 c->neverfocus = !wmh->input;
1955 else
1956 c->neverfocus = False;
1957 XFree(wmh);
1958 }
1959 }
1960
1961 void
1962 view(const Arg *arg) {
1963 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1964 return;
1965 selmon->seltags ^= 1; /* toggle sel tagset */
1966 if(arg->ui & TAGMASK)
1967 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1968 arrange(selmon);
1969 }
1970
1971 Client *
1972 wintoclient(Window w) {
1973 Client *c;
1974 Monitor *m;
1975
1976 for(m = mons; m; m = m->next)
1977 for(c = m->clients; c; c = c->next)
1978 if(c->win == w)
1979 return c;
1980 return NULL;
1981 }
1982
1983 Monitor *
1984 wintomon(Window w) {
1985 int x, y;
1986 Client *c;
1987 Monitor *m;
1988
1989 if(w == root && getrootptr(&x, &y))
1990 return ptrtomon(x, y);
1991 for(m = mons; m; m = m->next)
1992 if(w == m->barwin)
1993 return m;
1994 if((c = wintoclient(w)))
1995 return c->mon;
1996 return selmon;
1997 }
1998
1999 /* There's no way to check accesses to destroyed windows, thus those cases are
2000 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2001 * default error handler, which may call exit. */
2002 int
2003 xerror(Display *dpy, XErrorEvent *ee) {
2004 if(ee->error_code == BadWindow
2005 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2006 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2007 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2008 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2009 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2010 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2011 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2012 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2013 return 0;
2014 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2015 ee->request_code, ee->error_code);
2016 return xerrorxlib(dpy, ee); /* may call exit */
2017 }
2018
2019 int
2020 xerrordummy(Display *dpy, XErrorEvent *ee) {
2021 return 0;
2022 }
2023
2024 /* Startup Error handler to check if another window manager
2025 * is already running. */
2026 int
2027 xerrorstart(Display *dpy, XErrorEvent *ee) {
2028 die("dwm: another window manager is already running\n");
2029 return -1;
2030 }
2031
2032 void
2033 zoom(const Arg *arg) {
2034 Client *c = selmon->sel;
2035
2036 if(!selmon->lt[selmon->sellt]->arrange
2037 || selmon->lt[selmon->sellt]->arrange == monocle
2038 || (selmon->sel && selmon->sel->isfloating))
2039 return;
2040 if(c == nexttiled(selmon->clients))
2041 if(!c || !(c = nexttiled(c->next)))
2042 return;
2043 pop(c);
2044 }
2045
2046 int
2047 main(int argc, char *argv[]) {
2048 if(argc == 2 && !strcmp("-v", argv[1]))
2049 die("dwm-"VERSION", © 2006-2010 dwm engineers, see LICENSE for details\n");
2050 else if(argc != 1)
2051 die("usage: dwm [-v]\n");
2052 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2053 fputs("warning: no locale support\n", stderr);
2054 if(!(dpy = XOpenDisplay(NULL)))
2055 die("dwm: cannot open display\n");
2056 checkotherwm();
2057 setup();
2058 scan();
2059 run();
2060 cleanup();
2061 XCloseDisplay(dpy);
2062 return EXIT_SUCCESS;
2063 }