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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) & (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 */
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->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] && !c->isfullscreen) {
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 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
606 void
607 configurerequest(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
651 Monitor *
652 createmon(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
667 void
668 destroynotify(XEvent *e) {
669 Client *c;
670 XDestroyWindowEvent *ev = &e->xdestroywindow;
671
672 if((c = wintoclient(ev->window)))
673 unmanage(c, True);
674 }
675
676 void
677 detach(Client *c) {
678 Client **tc;
679
680 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
681 *tc = c->next;
682 }
683
684 void
685 detachstack(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
697 void
698 die(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
707 Monitor *
708 dirtomon(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
724 void
725 drawbar(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
774 void
775 drawbars(void) {
776 Monitor *m;
777
778 for(m = mons; m; m = m->next)
779 drawbar(m);
780 }
781
782 void
783 drawsquare(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
794 void
795 drawtext(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
821 void
822 enternotify(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 m = c ? c->mon : wintomon(ev->window);
831 if(m != selmon) {
832 unfocus(selmon->sel, True);
833 selmon = m;
834 }
835 else if(!c || c == selmon->sel)
836 return;
837 focus(c);
838 }
839
840 void
841 expose(XEvent *e) {
842 Monitor *m;
843 XExposeEvent *ev = &e->xexpose;
844
845 if(ev->count == 0 && (m = wintomon(ev->window)))
846 drawbar(m);
847 }
848
849 void
850 focus(Client *c) {
851 if(!c || !ISVISIBLE(c))
852 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
853 /* was if(selmon->sel) */
854 if(selmon->sel && selmon->sel != c)
855 unfocus(selmon->sel, False);
856 if(c) {
857 if(c->mon != selmon)
858 selmon = c->mon;
859 if(c->isurgent)
860 clearurgent(c);
861 detachstack(c);
862 attachstack(c);
863 grabbuttons(c, True);
864 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
865 setfocus(c);
866 }
867 else
868 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
869 selmon->sel = c;
870 drawbars();
871 }
872
873 void
874 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
875 XFocusChangeEvent *ev = &e->xfocus;
876
877 if(selmon->sel && ev->window != selmon->sel->win)
878 setfocus(selmon->sel);
879 }
880
881 void
882 focusmon(const Arg *arg) {
883 Monitor *m;
884
885 if(!mons->next)
886 return;
887 if((m = dirtomon(arg->i)) == selmon)
888 return;
889 unfocus(selmon->sel, True);
890 selmon = m;
891 focus(NULL);
892 }
893
894 void
895 focusstack(const Arg *arg) {
896 Client *c = NULL, *i;
897
898 if(!selmon->sel)
899 return;
900 if(arg->i > 0) {
901 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
902 if(!c)
903 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
904 }
905 else {
906 for(i = selmon->clients; i != selmon->sel; i = i->next)
907 if(ISVISIBLE(i))
908 c = i;
909 if(!c)
910 for(; i; i = i->next)
911 if(ISVISIBLE(i))
912 c = i;
913 }
914 if(c) {
915 focus(c);
916 restack(selmon);
917 }
918 }
919
920 unsigned long
921 getcolor(const char *colstr) {
922 Colormap cmap = DefaultColormap(dpy, screen);
923 XColor color;
924
925 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
926 die("error, cannot allocate color '%s'\n", colstr);
927 return color.pixel;
928 }
929
930 Bool
931 getrootptr(int *x, int *y) {
932 int di;
933 unsigned int dui;
934 Window dummy;
935
936 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
937 }
938
939 long
940 getstate(Window w) {
941 int format;
942 long result = -1;
943 unsigned char *p = NULL;
944 unsigned long n, extra;
945 Atom real;
946
947 if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
948 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
949 return -1;
950 if(n != 0)
951 result = *p;
952 XFree(p);
953 return result;
954 }
955
956 Bool
957 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
958 char **list = NULL;
959 int n;
960 XTextProperty name;
961
962 if(!text || size == 0)
963 return False;
964 text[0] = '\0';
965 XGetTextProperty(dpy, w, &name, atom);
966 if(!name.nitems)
967 return False;
968 if(name.encoding == XA_STRING)
969 strncpy(text, (char *)name.value, size - 1);
970 else {
971 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
972 strncpy(text, *list, size - 1);
973 XFreeStringList(list);
974 }
975 }
976 text[size - 1] = '\0';
977 XFree(name.value);
978 return True;
979 }
980
981 void
982 grabbuttons(Client *c, Bool focused) {
983 updatenumlockmask();
984 {
985 unsigned int i, j;
986 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
987 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
988 if(focused) {
989 for(i = 0; i < LENGTH(buttons); i++)
990 if(buttons[i].click == ClkClientWin)
991 for(j = 0; j < LENGTH(modifiers); j++)
992 XGrabButton(dpy, buttons[i].button,
993 buttons[i].mask | modifiers[j],
994 c->win, False, BUTTONMASK,
995 GrabModeAsync, GrabModeSync, None, None);
996 }
997 else
998 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
999 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
1000 }
1001 }
1002
1003 void
1004 grabkeys(void) {
1005 updatenumlockmask();
1006 {
1007 unsigned int i, j;
1008 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1009 KeyCode code;
1010
1011 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1012 for(i = 0; i < LENGTH(keys); i++) {
1013 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1014 for(j = 0; j < LENGTH(modifiers); j++)
1015 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1016 True, GrabModeAsync, GrabModeAsync);
1017 }
1018 }
1019 }
1020
1021 void
1022 initfont(const char *fontstr) {
1023 char *def, **missing;
1024 int n;
1025
1026 missing = NULL;
1027 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
1028 if(missing) {
1029 while(n--)
1030 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
1031 XFreeStringList(missing);
1032 }
1033 if(dc.font.set) {
1034 XFontStruct **xfonts;
1035 char **font_names;
1036
1037 dc.font.ascent = dc.font.descent = 0;
1038 XExtentsOfFontSet(dc.font.set);
1039 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
1040 while(n--) {
1041 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
1042 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
1043 xfonts++;
1044 }
1045 }
1046 else {
1047 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
1048 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
1049 die("error, cannot load font: '%s'\n", fontstr);
1050 dc.font.ascent = dc.font.xfont->ascent;
1051 dc.font.descent = dc.font.xfont->descent;
1052 }
1053 dc.font.height = dc.font.ascent + dc.font.descent;
1054 }
1055
1056 #ifdef XINERAMA
1057 static Bool
1058 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1059 while(n--)
1060 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1061 && unique[n].width == info->width && unique[n].height == info->height)
1062 return False;
1063 return True;
1064 }
1065 #endif /* XINERAMA */
1066
1067 void
1068 keypress(XEvent *e) {
1069 unsigned int i;
1070 KeySym keysym;
1071 XKeyEvent *ev;
1072
1073 ev = &e->xkey;
1074 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1075 for(i = 0; i < LENGTH(keys); i++)
1076 if(keysym == keys[i].keysym
1077 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1078 && keys[i].func)
1079 keys[i].func(&(keys[i].arg));
1080 }
1081
1082 void
1083 killclient(const Arg *arg) {
1084 if(!selmon->sel)
1085 return;
1086 if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1087 XGrabServer(dpy);
1088 XSetErrorHandler(xerrordummy);
1089 XSetCloseDownMode(dpy, DestroyAll);
1090 XKillClient(dpy, selmon->sel->win);
1091 XSync(dpy, False);
1092 XSetErrorHandler(xerror);
1093 XUngrabServer(dpy);
1094 }
1095 }
1096
1097 void
1098 manage(Window w, XWindowAttributes *wa) {
1099 Client *c, *t = NULL;
1100 Window trans = None;
1101 XWindowChanges wc;
1102
1103 if(!(c = calloc(1, sizeof(Client))))
1104 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1105 c->win = w;
1106 updatetitle(c);
1107 if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1108 c->mon = t->mon;
1109 c->tags = t->tags;
1110 }
1111 else {
1112 c->mon = selmon;
1113 applyrules(c);
1114 }
1115 /* geometry */
1116 c->x = c->oldx = wa->x;
1117 c->y = c->oldy = wa->y;
1118 c->w = c->oldw = wa->width;
1119 c->h = c->oldh = wa->height;
1120 c->oldbw = wa->border_width;
1121 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1122 c->isfloating = True;
1123 c->x = c->mon->mx;
1124 c->y = c->mon->my;
1125 c->bw = 0;
1126 }
1127 else {
1128 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1129 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1130 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1131 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1132 c->x = MAX(c->x, c->mon->mx);
1133 /* only fix client y-offset, if the client center might cover the bar */
1134 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1135 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1136 c->bw = borderpx;
1137 }
1138 wc.border_width = c->bw;
1139 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1140 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1141 configure(c); /* propagates border_width, if size doesn't change */
1142 updatesizehints(c);
1143 updatewmhints(c);
1144 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1145 grabbuttons(c, False);
1146 if(!c->isfloating)
1147 c->isfloating = c->oldstate = trans != None || c->isfixed;
1148 if(c->isfloating)
1149 XRaiseWindow(dpy, c->win);
1150 attach(c);
1151 attachstack(c);
1152 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1153 XMapWindow(dpy, c->win);
1154 setclientstate(c, NormalState);
1155 arrange(c->mon);
1156 }
1157
1158 void
1159 mappingnotify(XEvent *e) {
1160 XMappingEvent *ev = &e->xmapping;
1161
1162 XRefreshKeyboardMapping(ev);
1163 if(ev->request == MappingKeyboard)
1164 grabkeys();
1165 }
1166
1167 void
1168 maprequest(XEvent *e) {
1169 static XWindowAttributes wa;
1170 XMapRequestEvent *ev = &e->xmaprequest;
1171
1172 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1173 return;
1174 if(wa.override_redirect)
1175 return;
1176 if(!wintoclient(ev->window))
1177 manage(ev->window, &wa);
1178 }
1179
1180 void
1181 monocle(Monitor *m) {
1182 unsigned int n = 0;
1183 Client *c;
1184
1185 for(c = m->clients; c; c = c->next)
1186 if(ISVISIBLE(c))
1187 n++;
1188 if(n > 0) /* override layout symbol */
1189 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1190 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1191 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1192 }
1193
1194 void
1195 movemouse(const Arg *arg) {
1196 int x, y, ocx, ocy, nx, ny;
1197 Client *c;
1198 Monitor *m;
1199 XEvent ev;
1200
1201 if(!(c = selmon->sel))
1202 return;
1203 restack(selmon);
1204 ocx = c->x;
1205 ocy = c->y;
1206 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1207 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1208 return;
1209 if(!getrootptr(&x, &y))
1210 return;
1211 do {
1212 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1213 switch(ev.type) {
1214 case ConfigureRequest:
1215 case Expose:
1216 case MapRequest:
1217 handler[ev.type](&ev);
1218 break;
1219 case MotionNotify:
1220 nx = ocx + (ev.xmotion.x - x);
1221 ny = ocy + (ev.xmotion.y - y);
1222 if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1223 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1224 if(abs(selmon->wx - nx) < snap)
1225 nx = selmon->wx;
1226 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1227 nx = selmon->wx + selmon->ww - WIDTH(c);
1228 if(abs(selmon->wy - ny) < snap)
1229 ny = selmon->wy;
1230 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1231 ny = selmon->wy + selmon->wh - HEIGHT(c);
1232 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1233 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1234 togglefloating(NULL);
1235 }
1236 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1237 resize(c, nx, ny, c->w, c->h, True);
1238 break;
1239 }
1240 } while(ev.type != ButtonRelease);
1241 XUngrabPointer(dpy, CurrentTime);
1242 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1243 sendmon(c, m);
1244 selmon = m;
1245 focus(NULL);
1246 }
1247 }
1248
1249 Client *
1250 nexttiled(Client *c) {
1251 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1252 return c;
1253 }
1254
1255 void
1256 pop(Client *c) {
1257 detach(c);
1258 attach(c);
1259 focus(c);
1260 arrange(c->mon);
1261 }
1262
1263 void
1264 propertynotify(XEvent *e) {
1265 Client *c;
1266 Window trans;
1267 XPropertyEvent *ev = &e->xproperty;
1268
1269 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1270 updatestatus();
1271 else if(ev->state == PropertyDelete)
1272 return; /* ignore */
1273 else if((c = wintoclient(ev->window))) {
1274 switch(ev->atom) {
1275 default: break;
1276 case XA_WM_TRANSIENT_FOR:
1277 if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1278 (c->isfloating = (wintoclient(trans)) != NULL))
1279 arrange(c->mon);
1280 break;
1281 case XA_WM_NORMAL_HINTS:
1282 updatesizehints(c);
1283 break;
1284 case XA_WM_HINTS:
1285 updatewmhints(c);
1286 drawbars();
1287 break;
1288 }
1289 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1290 updatetitle(c);
1291 if(c == c->mon->sel)
1292 drawbar(c->mon);
1293 }
1294 }
1295 }
1296
1297 Monitor *
1298 ptrtomon(int x, int y) {
1299 Monitor *m;
1300
1301 for(m = mons; m; m = m->next)
1302 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1303 return m;
1304 return selmon;
1305 }
1306 void
1307 quit(const Arg *arg) {
1308 running = False;
1309 }
1310
1311 void
1312 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1313 if(applysizehints(c, &x, &y, &w, &h, interact))
1314 resizeclient(c, x, y, w, h);
1315 }
1316
1317 void
1318 resizeclient(Client *c, int x, int y, int w, int h) {
1319 XWindowChanges wc;
1320
1321 c->oldx = c->x; c->x = wc.x = x;
1322 c->oldy = c->y; c->y = wc.y = y;
1323 c->oldw = c->w; c->w = wc.width = w;
1324 c->oldh = c->h; c->h = wc.height = h;
1325 wc.border_width = c->bw;
1326 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1327 configure(c);
1328 XSync(dpy, False);
1329 }
1330
1331 void
1332 resizemouse(const Arg *arg) {
1333 int ocx, ocy;
1334 int nw, nh;
1335 Client *c;
1336 Monitor *m;
1337 XEvent ev;
1338
1339 if(!(c = selmon->sel))
1340 return;
1341 restack(selmon);
1342 ocx = c->x;
1343 ocy = c->y;
1344 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1345 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1346 return;
1347 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1348 do {
1349 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1350 switch(ev.type) {
1351 case ConfigureRequest:
1352 case Expose:
1353 case MapRequest:
1354 handler[ev.type](&ev);
1355 break;
1356 case MotionNotify:
1357 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1358 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1359 if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1360 && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1361 {
1362 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1363 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1364 togglefloating(NULL);
1365 }
1366 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1367 resize(c, c->x, c->y, nw, nh, True);
1368 break;
1369 }
1370 } while(ev.type != ButtonRelease);
1371 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1372 XUngrabPointer(dpy, CurrentTime);
1373 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1374 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1375 sendmon(c, m);
1376 selmon = m;
1377 focus(NULL);
1378 }
1379 }
1380
1381 void
1382 restack(Monitor *m) {
1383 Client *c;
1384 XEvent ev;
1385 XWindowChanges wc;
1386
1387 drawbar(m);
1388 if(!m->sel)
1389 return;
1390 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1391 XRaiseWindow(dpy, m->sel->win);
1392 if(m->lt[m->sellt]->arrange) {
1393 wc.stack_mode = Below;
1394 wc.sibling = m->barwin;
1395 for(c = m->stack; c; c = c->snext)
1396 if(!c->isfloating && ISVISIBLE(c)) {
1397 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1398 wc.sibling = c->win;
1399 }
1400 }
1401 XSync(dpy, False);
1402 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1403 }
1404
1405 void
1406 run(void) {
1407 XEvent ev;
1408 /* main event loop */
1409 XSync(dpy, False);
1410 while(running && !XNextEvent(dpy, &ev)) {
1411 if(handler[ev.type])
1412 handler[ev.type](&ev); /* call handler */
1413 }
1414 }
1415
1416 void
1417 scan(void) {
1418 unsigned int i, num;
1419 Window d1, d2, *wins = NULL;
1420 XWindowAttributes wa;
1421
1422 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1423 for(i = 0; i < num; i++) {
1424 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1425 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1426 continue;
1427 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1428 manage(wins[i], &wa);
1429 }
1430 for(i = 0; i < num; i++) { /* now the transients */
1431 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1432 continue;
1433 if(XGetTransientForHint(dpy, wins[i], &d1)
1434 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1435 manage(wins[i], &wa);
1436 }
1437 if(wins)
1438 XFree(wins);
1439 }
1440 }
1441
1442 void
1443 sendmon(Client *c, Monitor *m) {
1444 if(c->mon == m)
1445 return;
1446 unfocus(c, True);
1447 detach(c);
1448 detachstack(c);
1449 c->mon = m;
1450 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1451 attach(c);
1452 attachstack(c);
1453 focus(NULL);
1454 arrange(NULL);
1455 }
1456
1457 void
1458 setclientstate(Client *c, long state) {
1459 long data[] = { state, None };
1460
1461 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1462 PropModeReplace, (unsigned char *)data, 2);
1463 }
1464
1465 Bool
1466 sendevent(Client *c, Atom proto) {
1467 int n;
1468 Atom *protocols;
1469 Bool exists = False;
1470 XEvent ev;
1471
1472 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1473 while(!exists && n--)
1474 exists = protocols[n] == proto;
1475 XFree(protocols);
1476 }
1477 if(exists) {
1478 ev.type = ClientMessage;
1479 ev.xclient.window = c->win;
1480 ev.xclient.message_type = wmatom[WMProtocols];
1481 ev.xclient.format = 32;
1482 ev.xclient.data.l[0] = proto;
1483 ev.xclient.data.l[1] = CurrentTime;
1484 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1485 }
1486 return exists;
1487 }
1488
1489 void
1490 setfocus(Client *c) {
1491 if(!c->neverfocus)
1492 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1493 sendevent(c, wmatom[WMTakeFocus]);
1494 }
1495
1496 void
1497 setlayout(const Arg *arg) {
1498 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1499 selmon->sellt ^= 1;
1500 if(arg && arg->v)
1501 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1502 strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1503 if(selmon->sel)
1504 arrange(selmon);
1505 else
1506 drawbar(selmon);
1507 }
1508
1509 /* arg > 1.0 will set mfact absolutly */
1510 void
1511 setmfact(const Arg *arg) {
1512 float f;
1513
1514 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1515 return;
1516 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1517 if(f < 0.1 || f > 0.9)
1518 return;
1519 selmon->mfact = f;
1520 arrange(selmon);
1521 }
1522
1523 void
1524 setup(void) {
1525 XSetWindowAttributes wa;
1526
1527 /* clean up any zombies immediately */
1528 sigchld(0);
1529
1530 /* init screen */
1531 screen = DefaultScreen(dpy);
1532 root = RootWindow(dpy, screen);
1533 initfont(font);
1534 sw = DisplayWidth(dpy, screen);
1535 sh = DisplayHeight(dpy, screen);
1536 bh = dc.h = dc.font.height + 2;
1537 updategeom();
1538 /* init atoms */
1539 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1540 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1541 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1542 wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1543 netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1544 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1545 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1546 netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1547 netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1548 /* init cursors */
1549 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1550 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1551 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1552 /* init appearance */
1553 dc.norm[ColBorder] = getcolor(normbordercolor);
1554 dc.norm[ColBG] = getcolor(normbgcolor);
1555 dc.norm[ColFG] = getcolor(normfgcolor);
1556 dc.sel[ColBorder] = getcolor(selbordercolor);
1557 dc.sel[ColBG] = getcolor(selbgcolor);
1558 dc.sel[ColFG] = getcolor(selfgcolor);
1559 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1560 dc.gc = XCreateGC(dpy, root, 0, NULL);
1561 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1562 if(!dc.font.set)
1563 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1564 /* init bars */
1565 updatebars();
1566 updatestatus();
1567 /* EWMH support per view */
1568 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1569 PropModeReplace, (unsigned char *) netatom, NetLast);
1570 /* select for events */
1571 wa.cursor = cursor[CurNormal];
1572 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1573 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1574 |PropertyChangeMask;
1575 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1576 XSelectInput(dpy, root, wa.event_mask);
1577 grabkeys();
1578 }
1579
1580 void
1581 showhide(Client *c) {
1582 if(!c)
1583 return;
1584 if(ISVISIBLE(c)) { /* show clients top down */
1585 XMoveWindow(dpy, c->win, c->x, c->y);
1586 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1587 resize(c, c->x, c->y, c->w, c->h, False);
1588 showhide(c->snext);
1589 }
1590 else { /* hide clients bottom up */
1591 showhide(c->snext);
1592 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1593 }
1594 }
1595
1596 void
1597 sigchld(int unused) {
1598 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1599 die("Can't install SIGCHLD handler");
1600 while(0 < waitpid(-1, NULL, WNOHANG));
1601 }
1602
1603 void
1604 spawn(const Arg *arg) {
1605 if(fork() == 0) {
1606 if(dpy)
1607 close(ConnectionNumber(dpy));
1608 setsid();
1609 execvp(((char **)arg->v)[0], (char **)arg->v);
1610 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1611 perror(" failed");
1612 exit(EXIT_SUCCESS);
1613 }
1614 }
1615
1616 void
1617 tag(const Arg *arg) {
1618 if(selmon->sel && arg->ui & TAGMASK) {
1619 selmon->sel->tags = arg->ui & TAGMASK;
1620 arrange(selmon);
1621 }
1622 }
1623
1624 void
1625 tagmon(const Arg *arg) {
1626 if(!selmon->sel || !mons->next)
1627 return;
1628 sendmon(selmon->sel, dirtomon(arg->i));
1629 }
1630
1631 int
1632 textnw(const char *text, unsigned int len) {
1633 XRectangle r;
1634
1635 if(dc.font.set) {
1636 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1637 return r.width;
1638 }
1639 return XTextWidth(dc.font.xfont, text, len);
1640 }
1641
1642 void
1643 tile(Monitor *m) {
1644 int x, y, h, w, mw;
1645 unsigned int i, n;
1646 Client *c;
1647
1648 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1649 if(n == 0)
1650 return;
1651 /* master */
1652 c = nexttiled(m->clients);
1653 mw = m->mfact * m->ww;
1654 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1655 if(--n == 0)
1656 return;
1657 /* tile stack */
1658 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1659 y = m->wy;
1660 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1661 h = m->wh / n;
1662 if(h < bh)
1663 h = m->wh;
1664 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1665 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1666 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1667 if(h != m->wh)
1668 y = c->y + HEIGHT(c);
1669 }
1670 }
1671
1672 void
1673 togglebar(const Arg *arg) {
1674 selmon->showbar = !selmon->showbar;
1675 updatebarpos(selmon);
1676 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1677 arrange(selmon);
1678 }
1679
1680 void
1681 togglefloating(const Arg *arg) {
1682 if(!selmon->sel)
1683 return;
1684 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1685 if(selmon->sel->isfloating)
1686 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1687 selmon->sel->w, selmon->sel->h, False);
1688 arrange(selmon);
1689 }
1690
1691 void
1692 toggletag(const Arg *arg) {
1693 unsigned int newtags;
1694
1695 if(!selmon->sel)
1696 return;
1697 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1698 if(newtags) {
1699 selmon->sel->tags = newtags;
1700 arrange(selmon);
1701 }
1702 }
1703
1704 void
1705 toggleview(const Arg *arg) {
1706 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1707
1708 if(newtagset) {
1709 selmon->tagset[selmon->seltags] = newtagset;
1710 arrange(selmon);
1711 }
1712 }
1713
1714 void
1715 unfocus(Client *c, Bool setfocus) {
1716 if(!c)
1717 return;
1718 grabbuttons(c, False);
1719 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1720 if(setfocus)
1721 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1722 }
1723
1724 void
1725 unmanage(Client *c, Bool destroyed) {
1726 Monitor *m = c->mon;
1727 XWindowChanges wc;
1728
1729 /* The server grab construct avoids race conditions. */
1730 detach(c);
1731 detachstack(c);
1732 if(!destroyed) {
1733 wc.border_width = c->oldbw;
1734 XGrabServer(dpy);
1735 XSetErrorHandler(xerrordummy);
1736 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1737 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1738 setclientstate(c, WithdrawnState);
1739 XSync(dpy, False);
1740 XSetErrorHandler(xerror);
1741 XUngrabServer(dpy);
1742 }
1743 free(c);
1744 focus(NULL);
1745 arrange(m);
1746 }
1747
1748 void
1749 unmapnotify(XEvent *e) {
1750 Client *c;
1751 XUnmapEvent *ev = &e->xunmap;
1752
1753 if((c = wintoclient(ev->window)))
1754 unmanage(c, False);
1755 }
1756
1757 void
1758 updatebars(void) {
1759 Monitor *m;
1760 XSetWindowAttributes wa = {
1761 .override_redirect = True,
1762 .background_pixmap = ParentRelative,
1763 .event_mask = ButtonPressMask|ExposureMask
1764 };
1765 for(m = mons; m; m = m->next) {
1766 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1767 CopyFromParent, DefaultVisual(dpy, screen),
1768 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1769 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1770 XMapRaised(dpy, m->barwin);
1771 }
1772 }
1773
1774 void
1775 updatebarpos(Monitor *m) {
1776 m->wy = m->my;
1777 m->wh = m->mh;
1778 if(m->showbar) {
1779 m->wh -= bh;
1780 m->by = m->topbar ? m->wy : m->wy + m->wh;
1781 m->wy = m->topbar ? m->wy + bh : m->wy;
1782 }
1783 else
1784 m->by = -bh;
1785 }
1786
1787 Bool
1788 updategeom(void) {
1789 Bool dirty = False;
1790
1791 #ifdef XINERAMA
1792 if(XineramaIsActive(dpy)) {
1793 int i, j, n, nn;
1794 Client *c;
1795 Monitor *m;
1796 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1797 XineramaScreenInfo *unique = NULL;
1798
1799 for(n = 0, m = mons; m; m = m->next, n++);
1800 /* only consider unique geometries as separate screens */
1801 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
1802 die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
1803 for(i = 0, j = 0; i < nn; i++)
1804 if(isuniquegeom(unique, j, &info[i]))
1805 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1806 XFree(info);
1807 nn = j;
1808 if(n <= nn) {
1809 for(i = 0; i < (nn - n); i++) { /* new monitors available */
1810 for(m = mons; m && m->next; m = m->next);
1811 if(m)
1812 m->next = createmon();
1813 else
1814 mons = createmon();
1815 }
1816 for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1817 if(i >= n
1818 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1819 || unique[i].width != m->mw || unique[i].height != m->mh))
1820 {
1821 dirty = True;
1822 m->num = i;
1823 m->mx = m->wx = unique[i].x_org;
1824 m->my = m->wy = unique[i].y_org;
1825 m->mw = m->ww = unique[i].width;
1826 m->mh = m->wh = unique[i].height;
1827 updatebarpos(m);
1828 }
1829 }
1830 else { /* less monitors available nn < n */
1831 for(i = nn; i < n; i++) {
1832 for(m = mons; m && m->next; m = m->next);
1833 while(m->clients) {
1834 dirty = True;
1835 c = m->clients;
1836 m->clients = c->next;
1837 detachstack(c);
1838 c->mon = mons;
1839 attach(c);
1840 attachstack(c);
1841 }
1842 if(m == selmon)
1843 selmon = mons;
1844 cleanupmon(m);
1845 }
1846 }
1847 free(unique);
1848 }
1849 else
1850 #endif /* XINERAMA */
1851 /* default monitor setup */
1852 {
1853 if(!mons)
1854 mons = createmon();
1855 if(mons->mw != sw || mons->mh != sh) {
1856 dirty = True;
1857 mons->mw = mons->ww = sw;
1858 mons->mh = mons->wh = sh;
1859 updatebarpos(mons);
1860 }
1861 }
1862 if(dirty) {
1863 selmon = mons;
1864 selmon = wintomon(root);
1865 }
1866 return dirty;
1867 }
1868
1869 void
1870 updatenumlockmask(void) {
1871 unsigned int i, j;
1872 XModifierKeymap *modmap;
1873
1874 numlockmask = 0;
1875 modmap = XGetModifierMapping(dpy);
1876 for(i = 0; i < 8; i++)
1877 for(j = 0; j < modmap->max_keypermod; j++)
1878 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1879 == XKeysymToKeycode(dpy, XK_Num_Lock))
1880 numlockmask = (1 << i);
1881 XFreeModifiermap(modmap);
1882 }
1883
1884 void
1885 updatesizehints(Client *c) {
1886 long msize;
1887 XSizeHints size;
1888
1889 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1890 /* size is uninitialized, ensure that size.flags aren't used */
1891 size.flags = PSize;
1892 if(size.flags & PBaseSize) {
1893 c->basew = size.base_width;
1894 c->baseh = size.base_height;
1895 }
1896 else if(size.flags & PMinSize) {
1897 c->basew = size.min_width;
1898 c->baseh = size.min_height;
1899 }
1900 else
1901 c->basew = c->baseh = 0;
1902 if(size.flags & PResizeInc) {
1903 c->incw = size.width_inc;
1904 c->inch = size.height_inc;
1905 }
1906 else
1907 c->incw = c->inch = 0;
1908 if(size.flags & PMaxSize) {
1909 c->maxw = size.max_width;
1910 c->maxh = size.max_height;
1911 }
1912 else
1913 c->maxw = c->maxh = 0;
1914 if(size.flags & PMinSize) {
1915 c->minw = size.min_width;
1916 c->minh = size.min_height;
1917 }
1918 else if(size.flags & PBaseSize) {
1919 c->minw = size.base_width;
1920 c->minh = size.base_height;
1921 }
1922 else
1923 c->minw = c->minh = 0;
1924 if(size.flags & PAspect) {
1925 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1926 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1927 }
1928 else
1929 c->maxa = c->mina = 0.0;
1930 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1931 && c->maxw == c->minw && c->maxh == c->minh);
1932 }
1933
1934 void
1935 updatetitle(Client *c) {
1936 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1937 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1938 if(c->name[0] == '\0') /* hack to mark broken clients */
1939 strcpy(c->name, broken);
1940 }
1941
1942 void
1943 updatestatus(void) {
1944 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1945 strcpy(stext, "dwm-"VERSION);
1946 drawbar(selmon);
1947 }
1948
1949 void
1950 updatewmhints(Client *c) {
1951 XWMHints *wmh;
1952
1953 if((wmh = XGetWMHints(dpy, c->win))) {
1954 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1955 wmh->flags &= ~XUrgencyHint;
1956 XSetWMHints(dpy, c->win, wmh);
1957 }
1958 else
1959 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1960 if(wmh->flags & InputHint)
1961 c->neverfocus = !wmh->input;
1962 else
1963 c->neverfocus = False;
1964 XFree(wmh);
1965 }
1966 }
1967
1968 void
1969 view(const Arg *arg) {
1970 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1971 return;
1972 selmon->seltags ^= 1; /* toggle sel tagset */
1973 if(arg->ui & TAGMASK)
1974 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1975 arrange(selmon);
1976 }
1977
1978 Client *
1979 wintoclient(Window w) {
1980 Client *c;
1981 Monitor *m;
1982
1983 for(m = mons; m; m = m->next)
1984 for(c = m->clients; c; c = c->next)
1985 if(c->win == w)
1986 return c;
1987 return NULL;
1988 }
1989
1990 Monitor *
1991 wintomon(Window w) {
1992 int x, y;
1993 Client *c;
1994 Monitor *m;
1995
1996 if(w == root && getrootptr(&x, &y))
1997 return ptrtomon(x, y);
1998 for(m = mons; m; m = m->next)
1999 if(w == m->barwin)
2000 return m;
2001 if((c = wintoclient(w)))
2002 return c->mon;
2003 return selmon;
2004 }
2005
2006 /* There's no way to check accesses to destroyed windows, thus those cases are
2007 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2008 * default error handler, which may call exit. */
2009 int
2010 xerror(Display *dpy, XErrorEvent *ee) {
2011 if(ee->error_code == BadWindow
2012 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2013 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2014 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2015 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2016 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2017 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2018 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2019 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2020 return 0;
2021 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2022 ee->request_code, ee->error_code);
2023 return xerrorxlib(dpy, ee); /* may call exit */
2024 }
2025
2026 int
2027 xerrordummy(Display *dpy, XErrorEvent *ee) {
2028 return 0;
2029 }
2030
2031 /* Startup Error handler to check if another window manager
2032 * is already running. */
2033 int
2034 xerrorstart(Display *dpy, XErrorEvent *ee) {
2035 die("dwm: another window manager is already running\n");
2036 return -1;
2037 }
2038
2039 void
2040 zoom(const Arg *arg) {
2041 Client *c = selmon->sel;
2042
2043 if(!selmon->lt[selmon->sellt]->arrange
2044 || (selmon->sel && selmon->sel->isfloating))
2045 return;
2046 if(c == nexttiled(selmon->clients))
2047 if(!c || !(c = nexttiled(c->next)))
2048 return;
2049 pop(c);
2050 }
2051
2052 int
2053 main(int argc, char *argv[]) {
2054 if(argc == 2 && !strcmp("-v", argv[1]))
2055 die("dwm-"VERSION", © 2006-2011 dwm engineers, see LICENSE for details\n");
2056 else if(argc != 1)
2057 die("usage: dwm [-v]\n");
2058 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2059 fputs("warning: no locale support\n", stderr);
2060 if(!(dpy = XOpenDisplay(NULL)))
2061 die("dwm: cannot open display\n");
2062 checkotherwm();
2063 setup();
2064 scan();
2065 run();
2066 cleanup();
2067 XCloseDisplay(dpy);
2068 return EXIT_SUCCESS;
2069 }