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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 = { NULL, NULL };
293
294 /* rule matching */
295 c->isfloating = c->tags = 0;
296 XGetClassHint(dpy, c->win, &ch);
297 class = ch.res_class ? ch.res_class : broken;
298 instance = ch.res_name ? ch.res_name : broken;
299
300 for(i = 0; i < LENGTH(rules); i++) {
301 r = &rules[i];
302 if((!r->title || strstr(c->name, r->title))
303 && (!r->class || strstr(class, r->class))
304 && (!r->instance || strstr(instance, r->instance)))
305 {
306 c->isfloating = r->isfloating;
307 c->tags |= r->tags;
308 for(m = mons; m && m->num != r->monitor; m = m->next);
309 if(m)
310 c->mon = m;
311 }
312 }
313 if(ch.res_class)
314 XFree(ch.res_class);
315 if(ch.res_name)
316 XFree(ch.res_name);
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 if(m)
393 arrangemon(m);
394 else for(m = mons; m; m = m->next)
395 arrangemon(m);
396 }
397
398 void
399 arrangemon(Monitor *m) {
400 strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
401 if(m->lt[m->sellt]->arrange)
402 m->lt[m->sellt]->arrange(m);
403 restack(m);
404 }
405
406 void
407 attach(Client *c) {
408 c->next = c->mon->clients;
409 c->mon->clients = c;
410 }
411
412 void
413 attachstack(Client *c) {
414 c->snext = c->mon->stack;
415 c->mon->stack = c;
416 }
417
418 void
419 buttonpress(XEvent *e) {
420 unsigned int i, x, click;
421 Arg arg = {0};
422 Client *c;
423 Monitor *m;
424 XButtonPressedEvent *ev = &e->xbutton;
425
426 click = ClkRootWin;
427 /* focus monitor if necessary */
428 if((m = wintomon(ev->window)) && m != selmon) {
429 unfocus(selmon->sel, True);
430 selmon = m;
431 focus(NULL);
432 }
433 if(ev->window == selmon->barwin) {
434 i = x = 0;
435 do
436 x += TEXTW(tags[i]);
437 while(ev->x >= x && ++i < LENGTH(tags));
438 if(i < LENGTH(tags)) {
439 click = ClkTagBar;
440 arg.ui = 1 << i;
441 }
442 else if(ev->x < x + blw)
443 click = ClkLtSymbol;
444 else if(ev->x > selmon->ww - TEXTW(stext))
445 click = ClkStatusText;
446 else
447 click = ClkWinTitle;
448 }
449 else if((c = wintoclient(ev->window))) {
450 focus(c);
451 click = ClkClientWin;
452 }
453 for(i = 0; i < LENGTH(buttons); i++)
454 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
455 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
456 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
457 }
458
459 void
460 checkotherwm(void) {
461 xerrorxlib = XSetErrorHandler(xerrorstart);
462 /* this causes an error if some other window manager is running */
463 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
464 XSync(dpy, False);
465 XSetErrorHandler(xerror);
466 XSync(dpy, False);
467 }
468
469 void
470 cleanup(void) {
471 Arg a = {.ui = ~0};
472 Layout foo = { "", NULL };
473 Monitor *m;
474
475 view(&a);
476 selmon->lt[selmon->sellt] = &foo;
477 for(m = mons; m; m = m->next)
478 while(m->stack)
479 unmanage(m->stack, False);
480 if(dc.font.set)
481 XFreeFontSet(dpy, dc.font.set);
482 else
483 XFreeFont(dpy, dc.font.xfont);
484 XUngrabKey(dpy, AnyKey, AnyModifier, root);
485 XFreePixmap(dpy, dc.drawable);
486 XFreeGC(dpy, dc.gc);
487 XFreeCursor(dpy, cursor[CurNormal]);
488 XFreeCursor(dpy, cursor[CurResize]);
489 XFreeCursor(dpy, cursor[CurMove]);
490 while(mons)
491 cleanupmon(mons);
492 XSync(dpy, False);
493 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
494 }
495
496 void
497 cleanupmon(Monitor *mon) {
498 Monitor *m;
499
500 if(mon == mons)
501 mons = mons->next;
502 else {
503 for(m = mons; m && m->next != mon; m = m->next);
504 m->next = mon->next;
505 }
506 XUnmapWindow(dpy, mon->barwin);
507 XDestroyWindow(dpy, mon->barwin);
508 free(mon);
509 }
510
511 void
512 clearurgent(Client *c) {
513 XWMHints *wmh;
514
515 c->isurgent = False;
516 if(!(wmh = XGetWMHints(dpy, c->win)))
517 return;
518 wmh->flags &= ~XUrgencyHint;
519 XSetWMHints(dpy, c->win, wmh);
520 XFree(wmh);
521 }
522
523 void
524 clientmessage(XEvent *e) {
525 XClientMessageEvent *cme = &e->xclient;
526 Client *c = wintoclient(cme->window);
527
528 if(!c)
529 return;
530 if(cme->message_type == netatom[NetWMState] && cme->data.l[1] == netatom[NetWMFullscreen]) {
531 if(cme->data.l[0] && !c->isfullscreen) {
532 XChangeProperty(dpy, cme->window, netatom[NetWMState], XA_ATOM, 32,
533 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
534 c->isfullscreen = True;
535 c->oldstate = c->isfloating;
536 c->oldbw = c->bw;
537 c->bw = 0;
538 c->isfloating = True;
539 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
540 XRaiseWindow(dpy, c->win);
541 }
542 else {
543 XChangeProperty(dpy, cme->window, netatom[NetWMState], XA_ATOM, 32,
544 PropModeReplace, (unsigned char*)0, 0);
545 c->isfullscreen = False;
546 c->isfloating = c->oldstate;
547 c->bw = c->oldbw;
548 c->x = c->oldx;
549 c->y = c->oldy;
550 c->w = c->oldw;
551 c->h = c->oldh;
552 resizeclient(c, c->x, c->y, c->w, c->h);
553 arrange(c->mon);
554 }
555 }
556 else if(cme->message_type == netatom[NetActiveWindow]) {
557 if(!ISVISIBLE(c)) {
558 c->mon->seltags ^= 1;
559 c->mon->tagset[c->mon->seltags] = c->tags;
560 }
561 pop(c);
562 }
563 }
564
565 void
566 configure(Client *c) {
567 XConfigureEvent ce;
568
569 ce.type = ConfigureNotify;
570 ce.display = dpy;
571 ce.event = c->win;
572 ce.window = c->win;
573 ce.x = c->x;
574 ce.y = c->y;
575 ce.width = c->w;
576 ce.height = c->h;
577 ce.border_width = c->bw;
578 ce.above = None;
579 ce.override_redirect = False;
580 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
581 }
582
583 void
584 configurenotify(XEvent *e) {
585 Monitor *m;
586 XConfigureEvent *ev = &e->xconfigure;
587 Bool dirty;
588
589 if(ev->window == root) {
590 dirty = (sw != ev->width);
591 sw = ev->width;
592 sh = ev->height;
593 if(updategeom() || dirty) {
594 if(dc.drawable != 0)
595 XFreePixmap(dpy, dc.drawable);
596 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
597 updatebars();
598 for(m = mons; m; m = m->next)
599 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
600 focus(NULL);
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->oldx = c->x;
620 c->x = m->mx + ev->x;
621 }
622 if(ev->value_mask & CWY) {
623 c->oldy = c->y;
624 c->y = m->my + ev->y;
625 }
626 if(ev->value_mask & CWWidth) {
627 c->oldw = c->w;
628 c->w = ev->width;
629 }
630 if(ev->value_mask & CWHeight) {
631 c->oldh = c->h;
632 c->h = ev->height;
633 }
634 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
635 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
636 if((c->y + c->h) > m->my + m->mh && c->isfloating)
637 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
638 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
639 configure(c);
640 if(ISVISIBLE(c))
641 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
642 }
643 else
644 configure(c);
645 }
646 else {
647 wc.x = ev->x;
648 wc.y = ev->y;
649 wc.width = ev->width;
650 wc.height = ev->height;
651 wc.border_width = ev->border_width;
652 wc.sibling = ev->above;
653 wc.stack_mode = ev->detail;
654 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
655 }
656 XSync(dpy, False);
657 }
658
659 Monitor *
660 createmon(void) {
661 Monitor *m;
662
663 if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
664 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
665 m->tagset[0] = m->tagset[1] = 1;
666 m->mfact = mfact;
667 m->showbar = showbar;
668 m->topbar = topbar;
669 m->lt[0] = &layouts[0];
670 m->lt[1] = &layouts[1 % LENGTH(layouts)];
671 strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
672 return m;
673 }
674
675 void
676 destroynotify(XEvent *e) {
677 Client *c;
678 XDestroyWindowEvent *ev = &e->xdestroywindow;
679
680 if((c = wintoclient(ev->window)))
681 unmanage(c, True);
682 }
683
684 void
685 detach(Client *c) {
686 Client **tc;
687
688 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
689 *tc = c->next;
690 }
691
692 void
693 detachstack(Client *c) {
694 Client **tc, *t;
695
696 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
697 *tc = c->snext;
698
699 if(c == c->mon->sel) {
700 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
701 c->mon->sel = t;
702 }
703 }
704
705 void
706 die(const char *errstr, ...) {
707 va_list ap;
708
709 va_start(ap, errstr);
710 vfprintf(stderr, errstr, ap);
711 va_end(ap);
712 exit(EXIT_FAILURE);
713 }
714
715 Monitor *
716 dirtomon(int dir) {
717 Monitor *m = NULL;
718
719 if(dir > 0) {
720 if(!(m = selmon->next))
721 m = mons;
722 }
723 else if(selmon == mons)
724 for(m = mons; m->next; m = m->next);
725 else
726 for(m = mons; m->next != selmon; m = m->next);
727 return m;
728 }
729
730 void
731 drawbar(Monitor *m) {
732 int x;
733 unsigned int i, occ = 0, urg = 0;
734 unsigned long *col;
735 Client *c;
736
737 for(c = m->clients; c; c = c->next) {
738 occ |= c->tags;
739 if(c->isurgent)
740 urg |= c->tags;
741 }
742 dc.x = 0;
743 for(i = 0; i < LENGTH(tags); i++) {
744 dc.w = TEXTW(tags[i]);
745 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
746 drawtext(tags[i], col, urg & 1 << i);
747 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
748 occ & 1 << i, urg & 1 << i, col);
749 dc.x += dc.w;
750 }
751 dc.w = blw = TEXTW(m->ltsymbol);
752 drawtext(m->ltsymbol, dc.norm, False);
753 dc.x += dc.w;
754 x = dc.x;
755 if(m == selmon) { /* status is only drawn on selected monitor */
756 dc.w = TEXTW(stext);
757 dc.x = m->ww - dc.w;
758 if(dc.x < x) {
759 dc.x = x;
760 dc.w = m->ww - x;
761 }
762 drawtext(stext, dc.norm, False);
763 }
764 else
765 dc.x = m->ww;
766 if((dc.w = dc.x - x) > bh) {
767 dc.x = x;
768 if(m->sel) {
769 col = m == selmon ? dc.sel : dc.norm;
770 drawtext(m->sel->name, col, False);
771 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
772 }
773 else
774 drawtext(NULL, dc.norm, False);
775 }
776 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
777 XSync(dpy, False);
778 }
779
780 void
781 drawbars(void) {
782 Monitor *m;
783
784 for(m = mons; m; m = m->next)
785 drawbar(m);
786 }
787
788 void
789 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
790 int x;
791
792 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
793 x = (dc.font.ascent + dc.font.descent + 2) / 4;
794 if(filled)
795 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x+1, x+1);
796 else if(empty)
797 XDrawRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x, x);
798 }
799
800 void
801 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
802 char buf[256];
803 int i, x, y, h, len, olen;
804
805 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
806 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x, dc.y, dc.w, dc.h);
807 if(!text)
808 return;
809 olen = strlen(text);
810 h = dc.font.ascent + dc.font.descent;
811 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
812 x = dc.x + (h / 2);
813 /* shorten text if necessary */
814 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
815 if(!len)
816 return;
817 memcpy(buf, text, len);
818 if(len < olen)
819 for(i = len; i && i > len - 3; buf[--i] = '.');
820 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
821 if(dc.font.set)
822 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
823 else
824 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
825 }
826
827 void
828 enternotify(XEvent *e) {
829 Client *c;
830 Monitor *m;
831 XCrossingEvent *ev = &e->xcrossing;
832
833 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
834 return;
835 c = wintoclient(ev->window);
836 m = c ? c->mon : wintomon(ev->window);
837 if(m != selmon) {
838 unfocus(selmon->sel, True);
839 selmon = m;
840 }
841 else if(!c || c == selmon->sel)
842 return;
843 focus(c);
844 }
845
846 void
847 expose(XEvent *e) {
848 Monitor *m;
849 XExposeEvent *ev = &e->xexpose;
850
851 if(ev->count == 0 && (m = wintomon(ev->window)))
852 drawbar(m);
853 }
854
855 void
856 focus(Client *c) {
857 if(!c || !ISVISIBLE(c))
858 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
859 /* was if(selmon->sel) */
860 if(selmon->sel && selmon->sel != c)
861 unfocus(selmon->sel, False);
862 if(c) {
863 if(c->mon != selmon)
864 selmon = c->mon;
865 if(c->isurgent)
866 clearurgent(c);
867 detachstack(c);
868 attachstack(c);
869 grabbuttons(c, True);
870 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
871 setfocus(c);
872 }
873 else
874 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
875 selmon->sel = c;
876 drawbars();
877 }
878
879 void
880 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
881 XFocusChangeEvent *ev = &e->xfocus;
882
883 if(selmon->sel && ev->window != selmon->sel->win)
884 setfocus(selmon->sel);
885 }
886
887 void
888 focusmon(const Arg *arg) {
889 Monitor *m;
890
891 if(!mons->next)
892 return;
893 if((m = dirtomon(arg->i)) == selmon)
894 return;
895 unfocus(selmon->sel, True);
896 selmon = m;
897 focus(NULL);
898 }
899
900 void
901 focusstack(const Arg *arg) {
902 Client *c = NULL, *i;
903
904 if(!selmon->sel)
905 return;
906 if(arg->i > 0) {
907 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
908 if(!c)
909 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
910 }
911 else {
912 for(i = selmon->clients; i != selmon->sel; i = i->next)
913 if(ISVISIBLE(i))
914 c = i;
915 if(!c)
916 for(; i; i = i->next)
917 if(ISVISIBLE(i))
918 c = i;
919 }
920 if(c) {
921 focus(c);
922 restack(selmon);
923 }
924 }
925
926 unsigned long
927 getcolor(const char *colstr) {
928 Colormap cmap = DefaultColormap(dpy, screen);
929 XColor color;
930
931 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
932 die("error, cannot allocate color '%s'\n", colstr);
933 return color.pixel;
934 }
935
936 Bool
937 getrootptr(int *x, int *y) {
938 int di;
939 unsigned int dui;
940 Window dummy;
941
942 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
943 }
944
945 long
946 getstate(Window w) {
947 int format;
948 long result = -1;
949 unsigned char *p = NULL;
950 unsigned long n, extra;
951 Atom real;
952
953 if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
954 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
955 return -1;
956 if(n != 0)
957 result = *p;
958 XFree(p);
959 return result;
960 }
961
962 Bool
963 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
964 char **list = NULL;
965 int n;
966 XTextProperty name;
967
968 if(!text || size == 0)
969 return False;
970 text[0] = '\0';
971 XGetTextProperty(dpy, w, &name, atom);
972 if(!name.nitems)
973 return False;
974 if(name.encoding == XA_STRING)
975 strncpy(text, (char *)name.value, size - 1);
976 else {
977 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
978 strncpy(text, *list, size - 1);
979 XFreeStringList(list);
980 }
981 }
982 text[size - 1] = '\0';
983 XFree(name.value);
984 return True;
985 }
986
987 void
988 grabbuttons(Client *c, Bool focused) {
989 updatenumlockmask();
990 {
991 unsigned int i, j;
992 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
993 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
994 if(focused) {
995 for(i = 0; i < LENGTH(buttons); i++)
996 if(buttons[i].click == ClkClientWin)
997 for(j = 0; j < LENGTH(modifiers); j++)
998 XGrabButton(dpy, buttons[i].button,
999 buttons[i].mask | modifiers[j],
1000 c->win, False, BUTTONMASK,
1001 GrabModeAsync, GrabModeSync, None, None);
1002 }
1003 else
1004 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
1005 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
1006 }
1007 }
1008
1009 void
1010 grabkeys(void) {
1011 updatenumlockmask();
1012 {
1013 unsigned int i, j;
1014 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1015 KeyCode code;
1016
1017 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1018 for(i = 0; i < LENGTH(keys); i++)
1019 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1020 for(j = 0; j < LENGTH(modifiers); j++)
1021 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1022 True, GrabModeAsync, GrabModeAsync);
1023 }
1024 }
1025
1026 void
1027 initfont(const char *fontstr) {
1028 char *def, **missing;
1029 int n;
1030
1031 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
1032 if(missing) {
1033 while(n--)
1034 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
1035 XFreeStringList(missing);
1036 }
1037 if(dc.font.set) {
1038 XFontStruct **xfonts;
1039 char **font_names;
1040
1041 dc.font.ascent = dc.font.descent = 0;
1042 XExtentsOfFontSet(dc.font.set);
1043 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
1044 while(n--) {
1045 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
1046 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
1047 xfonts++;
1048 }
1049 }
1050 else {
1051 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
1052 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
1053 die("error, cannot load font: '%s'\n", fontstr);
1054 dc.font.ascent = dc.font.xfont->ascent;
1055 dc.font.descent = dc.font.xfont->descent;
1056 }
1057 dc.font.height = dc.font.ascent + dc.font.descent;
1058 }
1059
1060 #ifdef XINERAMA
1061 static Bool
1062 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1063 while(n--)
1064 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1065 && unique[n].width == info->width && unique[n].height == info->height)
1066 return False;
1067 return True;
1068 }
1069 #endif /* XINERAMA */
1070
1071 void
1072 keypress(XEvent *e) {
1073 unsigned int i;
1074 KeySym keysym;
1075 XKeyEvent *ev;
1076
1077 ev = &e->xkey;
1078 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1079 for(i = 0; i < LENGTH(keys); i++)
1080 if(keysym == keys[i].keysym
1081 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1082 && keys[i].func)
1083 keys[i].func(&(keys[i].arg));
1084 }
1085
1086 void
1087 killclient(const Arg *arg) {
1088 if(!selmon->sel)
1089 return;
1090 if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1091 XGrabServer(dpy);
1092 XSetErrorHandler(xerrordummy);
1093 XSetCloseDownMode(dpy, DestroyAll);
1094 XKillClient(dpy, selmon->sel->win);
1095 XSync(dpy, False);
1096 XSetErrorHandler(xerror);
1097 XUngrabServer(dpy);
1098 }
1099 }
1100
1101 void
1102 manage(Window w, XWindowAttributes *wa) {
1103 Client *c, *t = NULL;
1104 Window trans = None;
1105 XWindowChanges wc;
1106
1107 if(!(c = calloc(1, sizeof(Client))))
1108 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1109 c->win = w;
1110 updatetitle(c);
1111 if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1112 c->mon = t->mon;
1113 c->tags = t->tags;
1114 }
1115 else {
1116 c->mon = selmon;
1117 applyrules(c);
1118 }
1119 /* geometry */
1120 c->x = c->oldx = wa->x;
1121 c->y = c->oldy = wa->y;
1122 c->w = c->oldw = wa->width;
1123 c->h = c->oldh = wa->height;
1124 c->oldbw = wa->border_width;
1125 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1126 c->isfloating = True; // regression with flash, XXXX
1127 c->x = c->mon->mx;
1128 c->y = c->mon->my;
1129 c->bw = 0;
1130 }
1131 else {
1132 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1133 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1134 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1135 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1136 c->x = MAX(c->x, c->mon->mx);
1137 /* only fix client y-offset, if the client center might cover the bar */
1138 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1139 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1140 c->bw = borderpx;
1141 }
1142 wc.border_width = c->bw;
1143 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1144 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1145 configure(c); /* propagates border_width, if size doesn't change */
1146 updatesizehints(c);
1147 updatewmhints(c);
1148 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1149 grabbuttons(c, False);
1150 if(!c->isfloating)
1151 c->isfloating = c->oldstate = trans != None || c->isfixed;
1152 if(c->isfloating)
1153 XRaiseWindow(dpy, c->win);
1154 attach(c);
1155 attachstack(c);
1156 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1157 setclientstate(c, NormalState);
1158 if (c->mon == selmon)
1159 unfocus(selmon->sel, False);
1160 c->mon->sel = c;
1161 arrange(c->mon);
1162 XMapWindow(dpy, c->win);
1163 focus(NULL);
1164 }
1165
1166 void
1167 mappingnotify(XEvent *e) {
1168 XMappingEvent *ev = &e->xmapping;
1169
1170 XRefreshKeyboardMapping(ev);
1171 if(ev->request == MappingKeyboard)
1172 grabkeys();
1173 }
1174
1175 void
1176 maprequest(XEvent *e) {
1177 static XWindowAttributes wa;
1178 XMapRequestEvent *ev = &e->xmaprequest;
1179
1180 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1181 return;
1182 if(wa.override_redirect)
1183 return;
1184 if(!wintoclient(ev->window))
1185 manage(ev->window, &wa);
1186 }
1187
1188 void
1189 monocle(Monitor *m) {
1190 unsigned int n = 0;
1191 Client *c;
1192
1193 for(c = m->clients; c; c = c->next)
1194 if(ISVISIBLE(c))
1195 n++;
1196 if(n > 0) /* override layout symbol */
1197 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1198 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1199 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1200 }
1201
1202 void
1203 movemouse(const Arg *arg) {
1204 int x, y, ocx, ocy, nx, ny;
1205 Client *c;
1206 Monitor *m;
1207 XEvent ev;
1208
1209 if(!(c = selmon->sel))
1210 return;
1211 restack(selmon);
1212 ocx = c->x;
1213 ocy = c->y;
1214 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1215 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1216 return;
1217 if(!getrootptr(&x, &y))
1218 return;
1219 do {
1220 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1221 switch(ev.type) {
1222 case ConfigureRequest:
1223 case Expose:
1224 case MapRequest:
1225 handler[ev.type](&ev);
1226 break;
1227 case MotionNotify:
1228 nx = ocx + (ev.xmotion.x - x);
1229 ny = ocy + (ev.xmotion.y - y);
1230 if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1231 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1232 if(abs(selmon->wx - nx) < snap)
1233 nx = selmon->wx;
1234 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1235 nx = selmon->wx + selmon->ww - WIDTH(c);
1236 if(abs(selmon->wy - ny) < snap)
1237 ny = selmon->wy;
1238 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1239 ny = selmon->wy + selmon->wh - HEIGHT(c);
1240 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1241 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1242 togglefloating(NULL);
1243 }
1244 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1245 resize(c, nx, ny, c->w, c->h, True);
1246 break;
1247 }
1248 } while(ev.type != ButtonRelease);
1249 XUngrabPointer(dpy, CurrentTime);
1250 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1251 sendmon(c, m);
1252 selmon = m;
1253 focus(NULL);
1254 }
1255 }
1256
1257 Client *
1258 nexttiled(Client *c) {
1259 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1260 return c;
1261 }
1262
1263 void
1264 pop(Client *c) {
1265 detach(c);
1266 attach(c);
1267 focus(c);
1268 arrange(c->mon);
1269 }
1270
1271 void
1272 propertynotify(XEvent *e) {
1273 Client *c;
1274 Window trans;
1275 XPropertyEvent *ev = &e->xproperty;
1276
1277 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1278 updatestatus();
1279 else if(ev->state == PropertyDelete)
1280 return; /* ignore */
1281 else if((c = wintoclient(ev->window))) {
1282 switch(ev->atom) {
1283 default: break;
1284 case XA_WM_TRANSIENT_FOR:
1285 if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1286 (c->isfloating = (wintoclient(trans)) != NULL))
1287 arrange(c->mon);
1288 break;
1289 case XA_WM_NORMAL_HINTS:
1290 updatesizehints(c);
1291 break;
1292 case XA_WM_HINTS:
1293 updatewmhints(c);
1294 drawbars();
1295 break;
1296 }
1297 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1298 updatetitle(c);
1299 if(c == c->mon->sel)
1300 drawbar(c->mon);
1301 }
1302 }
1303 }
1304
1305 Monitor *
1306 ptrtomon(int x, int y) {
1307 Monitor *m;
1308
1309 for(m = mons; m; m = m->next)
1310 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1311 return m;
1312 return selmon;
1313 }
1314
1315 void
1316 quit(const Arg *arg) {
1317 running = False;
1318 }
1319
1320 void
1321 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1322 if(applysizehints(c, &x, &y, &w, &h, interact))
1323 resizeclient(c, x, y, w, h);
1324 }
1325
1326 void
1327 resizeclient(Client *c, int x, int y, int w, int h) {
1328 XWindowChanges wc;
1329
1330 c->oldx = c->x; c->x = wc.x = x;
1331 c->oldy = c->y; c->y = wc.y = y;
1332 c->oldw = c->w; c->w = wc.width = w;
1333 c->oldh = c->h; c->h = wc.height = h;
1334 wc.border_width = c->bw;
1335 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1336 configure(c);
1337 XSync(dpy, False);
1338 }
1339
1340 void
1341 resizemouse(const Arg *arg) {
1342 int ocx, ocy;
1343 int nw, nh;
1344 Client *c;
1345 Monitor *m;
1346 XEvent ev;
1347
1348 if(!(c = selmon->sel))
1349 return;
1350 restack(selmon);
1351 ocx = c->x;
1352 ocy = c->y;
1353 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1354 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1355 return;
1356 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1357 do {
1358 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1359 switch(ev.type) {
1360 case ConfigureRequest:
1361 case Expose:
1362 case MapRequest:
1363 handler[ev.type](&ev);
1364 break;
1365 case MotionNotify:
1366 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1367 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1368 if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1369 && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1370 {
1371 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1372 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1373 togglefloating(NULL);
1374 }
1375 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1376 resize(c, c->x, c->y, nw, nh, True);
1377 break;
1378 }
1379 } while(ev.type != ButtonRelease);
1380 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1381 XUngrabPointer(dpy, CurrentTime);
1382 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1383 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1384 sendmon(c, m);
1385 selmon = m;
1386 focus(NULL);
1387 }
1388 }
1389
1390 void
1391 restack(Monitor *m) {
1392 Client *c;
1393 XEvent ev;
1394 XWindowChanges wc;
1395
1396 drawbar(m);
1397 if(!m->sel)
1398 return;
1399 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1400 XRaiseWindow(dpy, m->sel->win);
1401 if(m->lt[m->sellt]->arrange) {
1402 wc.stack_mode = Below;
1403 wc.sibling = m->barwin;
1404 for(c = m->stack; c; c = c->snext)
1405 if(!c->isfloating && ISVISIBLE(c)) {
1406 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1407 wc.sibling = c->win;
1408 }
1409 }
1410 XSync(dpy, False);
1411 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1412 }
1413
1414 void
1415 run(void) {
1416 XEvent ev;
1417 /* main event loop */
1418 XSync(dpy, False);
1419 while(running && !XNextEvent(dpy, &ev))
1420 if(handler[ev.type])
1421 handler[ev.type](&ev); /* call handler */
1422 }
1423
1424 void
1425 scan(void) {
1426 unsigned int i, num;
1427 Window d1, d2, *wins = NULL;
1428 XWindowAttributes wa;
1429
1430 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1431 for(i = 0; i < num; i++) {
1432 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1433 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1434 continue;
1435 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1436 manage(wins[i], &wa);
1437 }
1438 for(i = 0; i < num; i++) { /* now the transients */
1439 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1440 continue;
1441 if(XGetTransientForHint(dpy, wins[i], &d1)
1442 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1443 manage(wins[i], &wa);
1444 }
1445 if(wins)
1446 XFree(wins);
1447 }
1448 }
1449
1450 void
1451 sendmon(Client *c, Monitor *m) {
1452 if(c->mon == m)
1453 return;
1454 unfocus(c, True);
1455 detach(c);
1456 detachstack(c);
1457 c->mon = m;
1458 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1459 attach(c);
1460 attachstack(c);
1461 focus(NULL);
1462 arrange(NULL);
1463 }
1464
1465 void
1466 setclientstate(Client *c, long state) {
1467 long data[] = { state, None };
1468
1469 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1470 PropModeReplace, (unsigned char *)data, 2);
1471 }
1472
1473 Bool
1474 sendevent(Client *c, Atom proto) {
1475 int n;
1476 Atom *protocols;
1477 Bool exists = False;
1478 XEvent ev;
1479
1480 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1481 while(!exists && n--)
1482 exists = protocols[n] == proto;
1483 XFree(protocols);
1484 }
1485 if(exists) {
1486 ev.type = ClientMessage;
1487 ev.xclient.window = c->win;
1488 ev.xclient.message_type = wmatom[WMProtocols];
1489 ev.xclient.format = 32;
1490 ev.xclient.data.l[0] = proto;
1491 ev.xclient.data.l[1] = CurrentTime;
1492 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1493 }
1494 return exists;
1495 }
1496
1497 void
1498 setfocus(Client *c) {
1499 if(!c->neverfocus)
1500 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1501 sendevent(c, wmatom[WMTakeFocus]);
1502 }
1503
1504 void
1505 setlayout(const Arg *arg) {
1506 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1507 selmon->sellt ^= 1;
1508 if(arg && arg->v)
1509 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1510 strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1511 if(selmon->sel)
1512 arrange(selmon);
1513 else
1514 drawbar(selmon);
1515 }
1516
1517 /* arg > 1.0 will set mfact absolutly */
1518 void
1519 setmfact(const Arg *arg) {
1520 float f;
1521
1522 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1523 return;
1524 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1525 if(f < 0.1 || f > 0.9)
1526 return;
1527 selmon->mfact = f;
1528 arrange(selmon);
1529 }
1530
1531 void
1532 setup(void) {
1533 XSetWindowAttributes wa;
1534
1535 /* clean up any zombies immediately */
1536 sigchld(0);
1537
1538 /* init screen */
1539 screen = DefaultScreen(dpy);
1540 root = RootWindow(dpy, screen);
1541 initfont(font);
1542 sw = DisplayWidth(dpy, screen);
1543 sh = DisplayHeight(dpy, screen);
1544 bh = dc.h = dc.font.height + 2;
1545 updategeom();
1546 /* init atoms */
1547 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1548 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1549 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1550 wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1551 netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1552 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1553 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1554 netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1555 netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1556 /* init cursors */
1557 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1558 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1559 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1560 /* init appearance */
1561 dc.norm[ColBorder] = getcolor(normbordercolor);
1562 dc.norm[ColBG] = getcolor(normbgcolor);
1563 dc.norm[ColFG] = getcolor(normfgcolor);
1564 dc.sel[ColBorder] = getcolor(selbordercolor);
1565 dc.sel[ColBG] = getcolor(selbgcolor);
1566 dc.sel[ColFG] = getcolor(selfgcolor);
1567 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1568 dc.gc = XCreateGC(dpy, root, 0, NULL);
1569 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1570 if(!dc.font.set)
1571 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1572 /* init bars */
1573 updatebars();
1574 updatestatus();
1575 /* EWMH support per view */
1576 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1577 PropModeReplace, (unsigned char *) netatom, NetLast);
1578 /* select for events */
1579 wa.cursor = cursor[CurNormal];
1580 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1581 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1582 |PropertyChangeMask;
1583 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1584 XSelectInput(dpy, root, wa.event_mask);
1585 grabkeys();
1586 }
1587
1588 void
1589 showhide(Client *c) {
1590 if(!c)
1591 return;
1592 if(ISVISIBLE(c)) { /* show clients top down */
1593 XMoveWindow(dpy, c->win, c->x, c->y);
1594 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1595 resize(c, c->x, c->y, c->w, c->h, False);
1596 showhide(c->snext);
1597 }
1598 else { /* hide clients bottom up */
1599 showhide(c->snext);
1600 XMoveWindow(dpy, c->win, c->w * -2, c->y);
1601 }
1602 }
1603
1604 void
1605 sigchld(int unused) {
1606 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1607 die("Can't install SIGCHLD handler");
1608 while(0 < waitpid(-1, NULL, WNOHANG));
1609 }
1610
1611 void
1612 spawn(const Arg *arg) {
1613 if(fork() == 0) {
1614 if(dpy)
1615 close(ConnectionNumber(dpy));
1616 setsid();
1617 execvp(((char **)arg->v)[0], (char **)arg->v);
1618 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1619 perror(" failed");
1620 exit(EXIT_SUCCESS);
1621 }
1622 }
1623
1624 void
1625 tag(const Arg *arg) {
1626 if(selmon->sel && arg->ui & TAGMASK) {
1627 selmon->sel->tags = arg->ui & TAGMASK;
1628 focus(NULL);
1629 arrange(selmon);
1630 }
1631 }
1632
1633 void
1634 tagmon(const Arg *arg) {
1635 if(!selmon->sel || !mons->next)
1636 return;
1637 sendmon(selmon->sel, dirtomon(arg->i));
1638 }
1639
1640 int
1641 textnw(const char *text, unsigned int len) {
1642 XRectangle r;
1643
1644 if(dc.font.set) {
1645 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1646 return r.width;
1647 }
1648 return XTextWidth(dc.font.xfont, text, len);
1649 }
1650
1651 void
1652 tile(Monitor *m) {
1653 int x, y, h, w, mw;
1654 unsigned int i, n;
1655 Client *c;
1656
1657 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1658 if(n == 0)
1659 return;
1660 /* master */
1661 c = nexttiled(m->clients);
1662 mw = m->mfact * m->ww;
1663 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1664 if(--n == 0)
1665 return;
1666 /* tile stack */
1667 x = (m->wx > c->x) ? c->x + mw + 2 * c->bw : m->wx + mw;
1668 y = m->wy;
1669 w = (m->wx > c->x) ? m->wx + m->ww - x : m->ww - mw;
1670 h = m->wh / n;
1671 if(h < bh)
1672 h = m->wh;
1673 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1674 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1675 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1676 if(h != m->wh)
1677 y = c->y + HEIGHT(c);
1678 }
1679 }
1680
1681 void
1682 togglebar(const Arg *arg) {
1683 selmon->showbar = !selmon->showbar;
1684 updatebarpos(selmon);
1685 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1686 arrange(selmon);
1687 }
1688
1689 void
1690 togglefloating(const Arg *arg) {
1691 if(!selmon->sel)
1692 return;
1693 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1694 if(selmon->sel->isfloating)
1695 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1696 selmon->sel->w, selmon->sel->h, False);
1697 arrange(selmon);
1698 }
1699
1700 void
1701 toggletag(const Arg *arg) {
1702 unsigned int newtags;
1703
1704 if(!selmon->sel)
1705 return;
1706 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1707 if(newtags) {
1708 selmon->sel->tags = newtags;
1709 focus(NULL);
1710 arrange(selmon);
1711 }
1712 }
1713
1714 void
1715 toggleview(const Arg *arg) {
1716 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1717
1718 if(newtagset) {
1719 selmon->tagset[selmon->seltags] = newtagset;
1720 focus(NULL);
1721 arrange(selmon);
1722 }
1723 }
1724
1725 void
1726 unfocus(Client *c, Bool setfocus) {
1727 if(!c)
1728 return;
1729 grabbuttons(c, False);
1730 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1731 if(setfocus)
1732 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1733 }
1734
1735 void
1736 unmanage(Client *c, Bool destroyed) {
1737 Monitor *m = c->mon;
1738 XWindowChanges wc;
1739
1740 /* The server grab construct avoids race conditions. */
1741 detach(c);
1742 detachstack(c);
1743 if(!destroyed) {
1744 wc.border_width = c->oldbw;
1745 XGrabServer(dpy);
1746 XSetErrorHandler(xerrordummy);
1747 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1748 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1749 setclientstate(c, WithdrawnState);
1750 XSync(dpy, False);
1751 XSetErrorHandler(xerror);
1752 XUngrabServer(dpy);
1753 }
1754 free(c);
1755 focus(NULL);
1756 arrange(m);
1757 }
1758
1759 void
1760 unmapnotify(XEvent *e) {
1761 Client *c;
1762 XUnmapEvent *ev = &e->xunmap;
1763
1764 if((c = wintoclient(ev->window))) {
1765 if(ev->send_event)
1766 setclientstate(c, WithdrawnState);
1767 else
1768 unmanage(c, False);
1769 }
1770 }
1771
1772 void
1773 updatebars(void) {
1774 Monitor *m;
1775 XSetWindowAttributes wa = {
1776 .override_redirect = True,
1777 .background_pixmap = ParentRelative,
1778 .event_mask = ButtonPressMask|ExposureMask
1779 };
1780 for(m = mons; m; m = m->next) {
1781 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1782 CopyFromParent, DefaultVisual(dpy, screen),
1783 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1784 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1785 XMapRaised(dpy, m->barwin);
1786 }
1787 }
1788
1789 void
1790 updatebarpos(Monitor *m) {
1791 m->wy = m->my;
1792 m->wh = m->mh;
1793 if(m->showbar) {
1794 m->wh -= bh;
1795 m->by = m->topbar ? m->wy : m->wy + m->wh;
1796 m->wy = m->topbar ? m->wy + bh : m->wy;
1797 }
1798 else
1799 m->by = -bh;
1800 }
1801
1802 Bool
1803 updategeom(void) {
1804 Bool dirty = False;
1805
1806 #ifdef XINERAMA
1807 if(XineramaIsActive(dpy)) {
1808 int i, j, n, nn;
1809 Client *c;
1810 Monitor *m;
1811 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1812 XineramaScreenInfo *unique = NULL;
1813
1814 for(n = 0, m = mons; m; m = m->next, n++);
1815 /* only consider unique geometries as separate screens */
1816 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
1817 die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
1818 for(i = 0, j = 0; i < nn; i++)
1819 if(isuniquegeom(unique, j, &info[i]))
1820 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1821 XFree(info);
1822 nn = j;
1823 if(n <= nn) {
1824 for(i = 0; i < (nn - n); i++) { /* new monitors available */
1825 for(m = mons; m && m->next; m = m->next);
1826 if(m)
1827 m->next = createmon();
1828 else
1829 mons = createmon();
1830 }
1831 for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1832 if(i >= n
1833 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1834 || unique[i].width != m->mw || unique[i].height != m->mh))
1835 {
1836 dirty = True;
1837 m->num = i;
1838 m->mx = m->wx = unique[i].x_org;
1839 m->my = m->wy = unique[i].y_org;
1840 m->mw = m->ww = unique[i].width;
1841 m->mh = m->wh = unique[i].height;
1842 updatebarpos(m);
1843 }
1844 }
1845 else { /* less monitors available nn < n */
1846 for(i = nn; i < n; i++) {
1847 for(m = mons; m && m->next; m = m->next);
1848 while(m->clients) {
1849 dirty = True;
1850 c = m->clients;
1851 m->clients = c->next;
1852 detachstack(c);
1853 c->mon = mons;
1854 attach(c);
1855 attachstack(c);
1856 }
1857 if(m == selmon)
1858 selmon = mons;
1859 cleanupmon(m);
1860 }
1861 }
1862 free(unique);
1863 }
1864 else
1865 #endif /* XINERAMA */
1866 /* default monitor setup */
1867 {
1868 if(!mons)
1869 mons = createmon();
1870 if(mons->mw != sw || mons->mh != sh) {
1871 dirty = True;
1872 mons->mw = mons->ww = sw;
1873 mons->mh = mons->wh = sh;
1874 updatebarpos(mons);
1875 }
1876 }
1877 if(dirty) {
1878 selmon = mons;
1879 selmon = wintomon(root);
1880 }
1881 return dirty;
1882 }
1883
1884 void
1885 updatenumlockmask(void) {
1886 unsigned int i, j;
1887 XModifierKeymap *modmap;
1888
1889 numlockmask = 0;
1890 modmap = XGetModifierMapping(dpy);
1891 for(i = 0; i < 8; i++)
1892 for(j = 0; j < modmap->max_keypermod; j++)
1893 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1894 == XKeysymToKeycode(dpy, XK_Num_Lock))
1895 numlockmask = (1 << i);
1896 XFreeModifiermap(modmap);
1897 }
1898
1899 void
1900 updatesizehints(Client *c) {
1901 long msize;
1902 XSizeHints size;
1903
1904 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1905 /* size is uninitialized, ensure that size.flags aren't used */
1906 size.flags = PSize;
1907 if(size.flags & PBaseSize) {
1908 c->basew = size.base_width;
1909 c->baseh = size.base_height;
1910 }
1911 else if(size.flags & PMinSize) {
1912 c->basew = size.min_width;
1913 c->baseh = size.min_height;
1914 }
1915 else
1916 c->basew = c->baseh = 0;
1917 if(size.flags & PResizeInc) {
1918 c->incw = size.width_inc;
1919 c->inch = size.height_inc;
1920 }
1921 else
1922 c->incw = c->inch = 0;
1923 if(size.flags & PMaxSize) {
1924 c->maxw = size.max_width;
1925 c->maxh = size.max_height;
1926 }
1927 else
1928 c->maxw = c->maxh = 0;
1929 if(size.flags & PMinSize) {
1930 c->minw = size.min_width;
1931 c->minh = size.min_height;
1932 }
1933 else if(size.flags & PBaseSize) {
1934 c->minw = size.base_width;
1935 c->minh = size.base_height;
1936 }
1937 else
1938 c->minw = c->minh = 0;
1939 if(size.flags & PAspect) {
1940 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1941 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1942 }
1943 else
1944 c->maxa = c->mina = 0.0;
1945 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1946 && c->maxw == c->minw && c->maxh == c->minh);
1947 }
1948
1949 void
1950 updatetitle(Client *c) {
1951 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1952 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1953 if(c->name[0] == '\0') /* hack to mark broken clients */
1954 strcpy(c->name, broken);
1955 }
1956
1957 void
1958 updatestatus(void) {
1959 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1960 strcpy(stext, "dwm-"VERSION);
1961 drawbar(selmon);
1962 }
1963
1964 void
1965 updatewmhints(Client *c) {
1966 XWMHints *wmh;
1967
1968 if((wmh = XGetWMHints(dpy, c->win))) {
1969 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1970 wmh->flags &= ~XUrgencyHint;
1971 XSetWMHints(dpy, c->win, wmh);
1972 }
1973 else
1974 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1975 if(wmh->flags & InputHint)
1976 c->neverfocus = !wmh->input;
1977 else
1978 c->neverfocus = False;
1979 XFree(wmh);
1980 }
1981 }
1982
1983 void
1984 view(const Arg *arg) {
1985 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1986 return;
1987 selmon->seltags ^= 1; /* toggle sel tagset */
1988 if(arg->ui & TAGMASK)
1989 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1990 focus(NULL);
1991 arrange(selmon);
1992 }
1993
1994 Client *
1995 wintoclient(Window w) {
1996 Client *c;
1997 Monitor *m;
1998
1999 for(m = mons; m; m = m->next)
2000 for(c = m->clients; c; c = c->next)
2001 if(c->win == w)
2002 return c;
2003 return NULL;
2004 }
2005
2006 Monitor *
2007 wintomon(Window w) {
2008 int x, y;
2009 Client *c;
2010 Monitor *m;
2011
2012 if(w == root && getrootptr(&x, &y))
2013 return ptrtomon(x, y);
2014 for(m = mons; m; m = m->next)
2015 if(w == m->barwin)
2016 return m;
2017 if((c = wintoclient(w)))
2018 return c->mon;
2019 return selmon;
2020 }
2021
2022 /* There's no way to check accesses to destroyed windows, thus those cases are
2023 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2024 * default error handler, which may call exit. */
2025 int
2026 xerror(Display *dpy, XErrorEvent *ee) {
2027 if(ee->error_code == BadWindow
2028 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2029 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2030 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2031 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2032 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2033 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2034 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2035 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2036 return 0;
2037 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2038 ee->request_code, ee->error_code);
2039 return xerrorxlib(dpy, ee); /* may call exit */
2040 }
2041
2042 int
2043 xerrordummy(Display *dpy, XErrorEvent *ee) {
2044 return 0;
2045 }
2046
2047 /* Startup Error handler to check if another window manager
2048 * is already running. */
2049 int
2050 xerrorstart(Display *dpy, XErrorEvent *ee) {
2051 die("dwm: another window manager is already running\n");
2052 return -1;
2053 }
2054
2055 void
2056 zoom(const Arg *arg) {
2057 Client *c = selmon->sel;
2058
2059 if(!selmon->lt[selmon->sellt]->arrange
2060 || (selmon->sel && selmon->sel->isfloating))
2061 return;
2062 if(c == nexttiled(selmon->clients))
2063 if(!c || !(c = nexttiled(c->next)))
2064 return;
2065 pop(c);
2066 }
2067
2068 int
2069 main(int argc, char *argv[]) {
2070 if(argc == 2 && !strcmp("-v", argv[1]))
2071 die("dwm-"VERSION", © 2006-2011 dwm engineers, see LICENSE for details\n");
2072 else if(argc != 1)
2073 die("usage: dwm [-v]\n");
2074 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2075 fputs("warning: no locale support\n", stderr);
2076 if(!(dpy = XOpenDisplay(NULL)))
2077 die("dwm: cannot open display\n");
2078 checkotherwm();
2079 setup();
2080 scan();
2081 run();
2082 cleanup();
2083 XCloseDisplay(dpy);
2084 return EXIT_SUCCESS;
2085 }