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applied lolilolicon's floating center patch, further investigation wrt his second...
[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->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 {
724 if(selmon == mons)
725 for(m = mons; m->next; m = m->next);
726 else
727 for(m = mons; m->next != selmon; m = m->next);
728 }
729 return m;
730 }
731
732 void
733 drawbar(Monitor *m) {
734 int x;
735 unsigned int i, occ = 0, urg = 0;
736 unsigned long *col;
737 Client *c;
738
739 for(c = m->clients; c; c = c->next) {
740 occ |= c->tags;
741 if(c->isurgent)
742 urg |= c->tags;
743 }
744 dc.x = 0;
745 for(i = 0; i < LENGTH(tags); i++) {
746 dc.w = TEXTW(tags[i]);
747 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
748 drawtext(tags[i], col, urg & 1 << i);
749 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
750 occ & 1 << i, urg & 1 << i, col);
751 dc.x += dc.w;
752 }
753 dc.w = blw = TEXTW(m->ltsymbol);
754 drawtext(m->ltsymbol, dc.norm, False);
755 dc.x += dc.w;
756 x = dc.x;
757 if(m == selmon) { /* status is only drawn on selected monitor */
758 dc.w = TEXTW(stext);
759 dc.x = m->ww - dc.w;
760 if(dc.x < x) {
761 dc.x = x;
762 dc.w = m->ww - x;
763 }
764 drawtext(stext, dc.norm, False);
765 }
766 else
767 dc.x = m->ww;
768 if((dc.w = dc.x - x) > bh) {
769 dc.x = x;
770 if(m->sel) {
771 col = m == selmon ? dc.sel : dc.norm;
772 drawtext(m->sel->name, col, False);
773 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
774 }
775 else
776 drawtext(NULL, dc.norm, False);
777 }
778 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
779 XSync(dpy, False);
780 }
781
782 void
783 drawbars(void) {
784 Monitor *m;
785
786 for(m = mons; m; m = m->next)
787 drawbar(m);
788 }
789
790 void
791 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
792 int x;
793
794 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
795 x = (dc.font.ascent + dc.font.descent + 2) / 4;
796 if(filled)
797 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x+1, x+1);
798 else if(empty)
799 XDrawRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x, x);
800 }
801
802 void
803 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
804 char buf[256];
805 int i, x, y, h, len, olen;
806
807 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
808 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x, dc.y, dc.w, dc.h);
809 if(!text)
810 return;
811 olen = strlen(text);
812 h = dc.font.ascent + dc.font.descent;
813 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
814 x = dc.x + (h / 2);
815 /* shorten text if necessary */
816 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
817 if(!len)
818 return;
819 memcpy(buf, text, len);
820 if(len < olen)
821 for(i = len; i && i > len - 3; buf[--i] = '.');
822 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
823 if(dc.font.set)
824 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
825 else
826 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
827 }
828
829 void
830 enternotify(XEvent *e) {
831 Client *c;
832 Monitor *m;
833 XCrossingEvent *ev = &e->xcrossing;
834
835 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
836 return;
837 c = wintoclient(ev->window);
838 m = c ? c->mon : wintomon(ev->window);
839 if(m != selmon) {
840 unfocus(selmon->sel, True);
841 selmon = m;
842 }
843 else if(!c || c == selmon->sel)
844 return;
845 focus(c);
846 }
847
848 void
849 expose(XEvent *e) {
850 Monitor *m;
851 XExposeEvent *ev = &e->xexpose;
852
853 if(ev->count == 0 && (m = wintomon(ev->window)))
854 drawbar(m);
855 }
856
857 void
858 focus(Client *c) {
859 if(!c || !ISVISIBLE(c))
860 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
861 /* was if(selmon->sel) */
862 if(selmon->sel && selmon->sel != c)
863 unfocus(selmon->sel, False);
864 if(c) {
865 if(c->mon != selmon)
866 selmon = c->mon;
867 if(c->isurgent)
868 clearurgent(c);
869 detachstack(c);
870 attachstack(c);
871 grabbuttons(c, True);
872 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
873 setfocus(c);
874 }
875 else
876 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
877 selmon->sel = c;
878 drawbars();
879 }
880
881 void
882 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
883 XFocusChangeEvent *ev = &e->xfocus;
884
885 if(selmon->sel && ev->window != selmon->sel->win)
886 setfocus(selmon->sel);
887 }
888
889 void
890 focusmon(const Arg *arg) {
891 Monitor *m;
892
893 if(!mons->next)
894 return;
895 if((m = dirtomon(arg->i)) == selmon)
896 return;
897 unfocus(selmon->sel, True);
898 selmon = m;
899 focus(NULL);
900 }
901
902 void
903 focusstack(const Arg *arg) {
904 Client *c = NULL, *i;
905
906 if(!selmon->sel)
907 return;
908 if(arg->i > 0) {
909 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
910 if(!c)
911 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
912 }
913 else {
914 for(i = selmon->clients; i != selmon->sel; i = i->next)
915 if(ISVISIBLE(i))
916 c = i;
917 if(!c)
918 for(; i; i = i->next)
919 if(ISVISIBLE(i))
920 c = i;
921 }
922 if(c) {
923 focus(c);
924 restack(selmon);
925 }
926 }
927
928 unsigned long
929 getcolor(const char *colstr) {
930 Colormap cmap = DefaultColormap(dpy, screen);
931 XColor color;
932
933 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
934 die("error, cannot allocate color '%s'\n", colstr);
935 return color.pixel;
936 }
937
938 Bool
939 getrootptr(int *x, int *y) {
940 int di;
941 unsigned int dui;
942 Window dummy;
943
944 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
945 }
946
947 long
948 getstate(Window w) {
949 int format;
950 long result = -1;
951 unsigned char *p = NULL;
952 unsigned long n, extra;
953 Atom real;
954
955 if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
956 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
957 return -1;
958 if(n != 0)
959 result = *p;
960 XFree(p);
961 return result;
962 }
963
964 Bool
965 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
966 char **list = NULL;
967 int n;
968 XTextProperty name;
969
970 if(!text || size == 0)
971 return False;
972 text[0] = '\0';
973 XGetTextProperty(dpy, w, &name, atom);
974 if(!name.nitems)
975 return False;
976 if(name.encoding == XA_STRING)
977 strncpy(text, (char *)name.value, size - 1);
978 else {
979 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
980 strncpy(text, *list, size - 1);
981 XFreeStringList(list);
982 }
983 }
984 text[size - 1] = '\0';
985 XFree(name.value);
986 return True;
987 }
988
989 void
990 grabbuttons(Client *c, Bool focused) {
991 updatenumlockmask();
992 {
993 unsigned int i, j;
994 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
995 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
996 if(focused) {
997 for(i = 0; i < LENGTH(buttons); i++)
998 if(buttons[i].click == ClkClientWin)
999 for(j = 0; j < LENGTH(modifiers); j++)
1000 XGrabButton(dpy, buttons[i].button,
1001 buttons[i].mask | modifiers[j],
1002 c->win, False, BUTTONMASK,
1003 GrabModeAsync, GrabModeSync, None, None);
1004 }
1005 else
1006 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
1007 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
1008 }
1009 }
1010
1011 void
1012 grabkeys(void) {
1013 updatenumlockmask();
1014 {
1015 unsigned int i, j;
1016 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1017 KeyCode code;
1018
1019 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1020 for(i = 0; i < LENGTH(keys); i++) {
1021 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1022 for(j = 0; j < LENGTH(modifiers); j++)
1023 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1024 True, GrabModeAsync, GrabModeAsync);
1025 }
1026 }
1027 }
1028
1029 void
1030 initfont(const char *fontstr) {
1031 char *def, **missing;
1032 int n;
1033
1034 missing = NULL;
1035 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
1036 if(missing) {
1037 while(n--)
1038 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
1039 XFreeStringList(missing);
1040 }
1041 if(dc.font.set) {
1042 XFontStruct **xfonts;
1043 char **font_names;
1044
1045 dc.font.ascent = dc.font.descent = 0;
1046 XExtentsOfFontSet(dc.font.set);
1047 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
1048 while(n--) {
1049 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
1050 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
1051 xfonts++;
1052 }
1053 }
1054 else {
1055 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
1056 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
1057 die("error, cannot load font: '%s'\n", fontstr);
1058 dc.font.ascent = dc.font.xfont->ascent;
1059 dc.font.descent = dc.font.xfont->descent;
1060 }
1061 dc.font.height = dc.font.ascent + dc.font.descent;
1062 }
1063
1064 #ifdef XINERAMA
1065 static Bool
1066 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1067 while(n--)
1068 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1069 && unique[n].width == info->width && unique[n].height == info->height)
1070 return False;
1071 return True;
1072 }
1073 #endif /* XINERAMA */
1074
1075 void
1076 keypress(XEvent *e) {
1077 unsigned int i;
1078 KeySym keysym;
1079 XKeyEvent *ev;
1080
1081 ev = &e->xkey;
1082 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1083 for(i = 0; i < LENGTH(keys); i++)
1084 if(keysym == keys[i].keysym
1085 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1086 && keys[i].func)
1087 keys[i].func(&(keys[i].arg));
1088 }
1089
1090 void
1091 killclient(const Arg *arg) {
1092 if(!selmon->sel)
1093 return;
1094 if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1095 XGrabServer(dpy);
1096 XSetErrorHandler(xerrordummy);
1097 XSetCloseDownMode(dpy, DestroyAll);
1098 XKillClient(dpy, selmon->sel->win);
1099 XSync(dpy, False);
1100 XSetErrorHandler(xerror);
1101 XUngrabServer(dpy);
1102 }
1103 }
1104
1105 void
1106 manage(Window w, XWindowAttributes *wa) {
1107 Client *c, *t = NULL;
1108 Window trans = None;
1109 XWindowChanges wc;
1110
1111 if(!(c = calloc(1, sizeof(Client))))
1112 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1113 c->win = w;
1114 updatetitle(c);
1115 if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1116 c->mon = t->mon;
1117 c->tags = t->tags;
1118 }
1119 else {
1120 c->mon = selmon;
1121 applyrules(c);
1122 }
1123 /* geometry */
1124 c->x = c->oldx = wa->x;
1125 c->y = c->oldy = wa->y;
1126 c->w = c->oldw = wa->width;
1127 c->h = c->oldh = wa->height;
1128 c->oldbw = wa->border_width;
1129 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1130 c->isfloating = True;
1131 c->x = c->mon->mx;
1132 c->y = c->mon->my;
1133 c->bw = 0;
1134 }
1135 else {
1136 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1137 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1138 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1139 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1140 c->x = MAX(c->x, c->mon->mx);
1141 /* only fix client y-offset, if the client center might cover the bar */
1142 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1143 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1144 c->bw = borderpx;
1145 }
1146 wc.border_width = c->bw;
1147 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1148 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1149 configure(c); /* propagates border_width, if size doesn't change */
1150 updatesizehints(c);
1151 updatewmhints(c);
1152 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1153 grabbuttons(c, False);
1154 if(!c->isfloating)
1155 c->isfloating = c->oldstate = trans != None || c->isfixed;
1156 if(c->isfloating)
1157 XRaiseWindow(dpy, c->win);
1158 attach(c);
1159 attachstack(c);
1160 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1161 XMapWindow(dpy, c->win);
1162 setclientstate(c, NormalState);
1163 arrange(c->mon);
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 void
1315 quit(const Arg *arg) {
1316 running = False;
1317 }
1318
1319 void
1320 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1321 if(applysizehints(c, &x, &y, &w, &h, interact))
1322 resizeclient(c, x, y, w, h);
1323 }
1324
1325 void
1326 resizeclient(Client *c, int x, int y, int w, int h) {
1327 XWindowChanges wc;
1328
1329 c->oldx = c->x; c->x = wc.x = x;
1330 c->oldy = c->y; c->y = wc.y = y;
1331 c->oldw = c->w; c->w = wc.width = w;
1332 c->oldh = c->h; c->h = wc.height = h;
1333 wc.border_width = c->bw;
1334 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1335 configure(c);
1336 XSync(dpy, False);
1337 }
1338
1339 void
1340 resizemouse(const Arg *arg) {
1341 int ocx, ocy;
1342 int nw, nh;
1343 Client *c;
1344 Monitor *m;
1345 XEvent ev;
1346
1347 if(!(c = selmon->sel))
1348 return;
1349 restack(selmon);
1350 ocx = c->x;
1351 ocy = c->y;
1352 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1353 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1354 return;
1355 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1356 do {
1357 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1358 switch(ev.type) {
1359 case ConfigureRequest:
1360 case Expose:
1361 case MapRequest:
1362 handler[ev.type](&ev);
1363 break;
1364 case MotionNotify:
1365 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1366 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1367 if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1368 && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1369 {
1370 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1371 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1372 togglefloating(NULL);
1373 }
1374 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1375 resize(c, c->x, c->y, nw, nh, True);
1376 break;
1377 }
1378 } while(ev.type != ButtonRelease);
1379 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1380 XUngrabPointer(dpy, CurrentTime);
1381 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1382 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1383 sendmon(c, m);
1384 selmon = m;
1385 focus(NULL);
1386 }
1387 }
1388
1389 void
1390 restack(Monitor *m) {
1391 Client *c;
1392 XEvent ev;
1393 XWindowChanges wc;
1394
1395 drawbar(m);
1396 if(!m->sel)
1397 return;
1398 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1399 XRaiseWindow(dpy, m->sel->win);
1400 if(m->lt[m->sellt]->arrange) {
1401 wc.stack_mode = Below;
1402 wc.sibling = m->barwin;
1403 for(c = m->stack; c; c = c->snext)
1404 if(!c->isfloating && ISVISIBLE(c)) {
1405 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1406 wc.sibling = c->win;
1407 }
1408 }
1409 XSync(dpy, False);
1410 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1411 }
1412
1413 void
1414 run(void) {
1415 XEvent ev;
1416 /* main event loop */
1417 XSync(dpy, False);
1418 while(running && !XNextEvent(dpy, &ev)) {
1419 if(handler[ev.type])
1420 handler[ev.type](&ev); /* call handler */
1421 }
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->x + 2 * sw, 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 arrange(selmon);
1629 }
1630 }
1631
1632 void
1633 tagmon(const Arg *arg) {
1634 if(!selmon->sel || !mons->next)
1635 return;
1636 sendmon(selmon->sel, dirtomon(arg->i));
1637 }
1638
1639 int
1640 textnw(const char *text, unsigned int len) {
1641 XRectangle r;
1642
1643 if(dc.font.set) {
1644 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1645 return r.width;
1646 }
1647 return XTextWidth(dc.font.xfont, text, len);
1648 }
1649
1650 void
1651 tile(Monitor *m) {
1652 int x, y, h, w, mw;
1653 unsigned int i, n;
1654 Client *c;
1655
1656 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1657 if(n == 0)
1658 return;
1659 /* master */
1660 c = nexttiled(m->clients);
1661 mw = m->mfact * m->ww;
1662 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1663 if(--n == 0)
1664 return;
1665 /* tile stack */
1666 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1667 y = m->wy;
1668 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1669 h = m->wh / n;
1670 if(h < bh)
1671 h = m->wh;
1672 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1673 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1674 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1675 if(h != m->wh)
1676 y = c->y + HEIGHT(c);
1677 }
1678 }
1679
1680 void
1681 togglebar(const Arg *arg) {
1682 selmon->showbar = !selmon->showbar;
1683 updatebarpos(selmon);
1684 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1685 arrange(selmon);
1686 }
1687
1688 void
1689 togglefloating(const Arg *arg) {
1690 if(!selmon->sel)
1691 return;
1692 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1693 if(selmon->sel->isfloating)
1694 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1695 selmon->sel->w, selmon->sel->h, False);
1696 arrange(selmon);
1697 }
1698
1699 void
1700 toggletag(const Arg *arg) {
1701 unsigned int newtags;
1702
1703 if(!selmon->sel)
1704 return;
1705 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1706 if(newtags) {
1707 selmon->sel->tags = newtags;
1708 arrange(selmon);
1709 }
1710 }
1711
1712 void
1713 toggleview(const Arg *arg) {
1714 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1715
1716 if(newtagset) {
1717 selmon->tagset[selmon->seltags] = newtagset;
1718 arrange(selmon);
1719 }
1720 }
1721
1722 void
1723 unfocus(Client *c, Bool setfocus) {
1724 if(!c)
1725 return;
1726 grabbuttons(c, False);
1727 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1728 if(setfocus)
1729 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1730 }
1731
1732 void
1733 unmanage(Client *c, Bool destroyed) {
1734 Monitor *m = c->mon;
1735 XWindowChanges wc;
1736
1737 /* The server grab construct avoids race conditions. */
1738 detach(c);
1739 detachstack(c);
1740 if(!destroyed) {
1741 wc.border_width = c->oldbw;
1742 XGrabServer(dpy);
1743 XSetErrorHandler(xerrordummy);
1744 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1745 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1746 setclientstate(c, WithdrawnState);
1747 XSync(dpy, False);
1748 XSetErrorHandler(xerror);
1749 XUngrabServer(dpy);
1750 }
1751 free(c);
1752 focus(NULL);
1753 arrange(m);
1754 }
1755
1756 void
1757 unmapnotify(XEvent *e) {
1758 Client *c;
1759 XUnmapEvent *ev = &e->xunmap;
1760
1761 if((c = wintoclient(ev->window)))
1762 unmanage(c, False);
1763 }
1764
1765 void
1766 updatebars(void) {
1767 Monitor *m;
1768 XSetWindowAttributes wa = {
1769 .override_redirect = True,
1770 .background_pixmap = ParentRelative,
1771 .event_mask = ButtonPressMask|ExposureMask
1772 };
1773 for(m = mons; m; m = m->next) {
1774 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1775 CopyFromParent, DefaultVisual(dpy, screen),
1776 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1777 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1778 XMapRaised(dpy, m->barwin);
1779 }
1780 }
1781
1782 void
1783 updatebarpos(Monitor *m) {
1784 m->wy = m->my;
1785 m->wh = m->mh;
1786 if(m->showbar) {
1787 m->wh -= bh;
1788 m->by = m->topbar ? m->wy : m->wy + m->wh;
1789 m->wy = m->topbar ? m->wy + bh : m->wy;
1790 }
1791 else
1792 m->by = -bh;
1793 }
1794
1795 Bool
1796 updategeom(void) {
1797 Bool dirty = False;
1798
1799 #ifdef XINERAMA
1800 if(XineramaIsActive(dpy)) {
1801 int i, j, n, nn;
1802 Client *c;
1803 Monitor *m;
1804 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1805 XineramaScreenInfo *unique = NULL;
1806
1807 for(n = 0, m = mons; m; m = m->next, n++);
1808 /* only consider unique geometries as separate screens */
1809 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
1810 die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
1811 for(i = 0, j = 0; i < nn; i++)
1812 if(isuniquegeom(unique, j, &info[i]))
1813 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1814 XFree(info);
1815 nn = j;
1816 if(n <= nn) {
1817 for(i = 0; i < (nn - n); i++) { /* new monitors available */
1818 for(m = mons; m && m->next; m = m->next);
1819 if(m)
1820 m->next = createmon();
1821 else
1822 mons = createmon();
1823 }
1824 for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1825 if(i >= n
1826 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1827 || unique[i].width != m->mw || unique[i].height != m->mh))
1828 {
1829 dirty = True;
1830 m->num = i;
1831 m->mx = m->wx = unique[i].x_org;
1832 m->my = m->wy = unique[i].y_org;
1833 m->mw = m->ww = unique[i].width;
1834 m->mh = m->wh = unique[i].height;
1835 updatebarpos(m);
1836 }
1837 }
1838 else { /* less monitors available nn < n */
1839 for(i = nn; i < n; i++) {
1840 for(m = mons; m && m->next; m = m->next);
1841 while(m->clients) {
1842 dirty = True;
1843 c = m->clients;
1844 m->clients = c->next;
1845 detachstack(c);
1846 c->mon = mons;
1847 attach(c);
1848 attachstack(c);
1849 }
1850 if(m == selmon)
1851 selmon = mons;
1852 cleanupmon(m);
1853 }
1854 }
1855 free(unique);
1856 }
1857 else
1858 #endif /* XINERAMA */
1859 /* default monitor setup */
1860 {
1861 if(!mons)
1862 mons = createmon();
1863 if(mons->mw != sw || mons->mh != sh) {
1864 dirty = True;
1865 mons->mw = mons->ww = sw;
1866 mons->mh = mons->wh = sh;
1867 updatebarpos(mons);
1868 }
1869 }
1870 if(dirty) {
1871 selmon = mons;
1872 selmon = wintomon(root);
1873 }
1874 return dirty;
1875 }
1876
1877 void
1878 updatenumlockmask(void) {
1879 unsigned int i, j;
1880 XModifierKeymap *modmap;
1881
1882 numlockmask = 0;
1883 modmap = XGetModifierMapping(dpy);
1884 for(i = 0; i < 8; i++)
1885 for(j = 0; j < modmap->max_keypermod; j++)
1886 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1887 == XKeysymToKeycode(dpy, XK_Num_Lock))
1888 numlockmask = (1 << i);
1889 XFreeModifiermap(modmap);
1890 }
1891
1892 void
1893 updatesizehints(Client *c) {
1894 long msize;
1895 XSizeHints size;
1896
1897 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1898 /* size is uninitialized, ensure that size.flags aren't used */
1899 size.flags = PSize;
1900 if(size.flags & PBaseSize) {
1901 c->basew = size.base_width;
1902 c->baseh = size.base_height;
1903 }
1904 else if(size.flags & PMinSize) {
1905 c->basew = size.min_width;
1906 c->baseh = size.min_height;
1907 }
1908 else
1909 c->basew = c->baseh = 0;
1910 if(size.flags & PResizeInc) {
1911 c->incw = size.width_inc;
1912 c->inch = size.height_inc;
1913 }
1914 else
1915 c->incw = c->inch = 0;
1916 if(size.flags & PMaxSize) {
1917 c->maxw = size.max_width;
1918 c->maxh = size.max_height;
1919 }
1920 else
1921 c->maxw = c->maxh = 0;
1922 if(size.flags & PMinSize) {
1923 c->minw = size.min_width;
1924 c->minh = size.min_height;
1925 }
1926 else if(size.flags & PBaseSize) {
1927 c->minw = size.base_width;
1928 c->minh = size.base_height;
1929 }
1930 else
1931 c->minw = c->minh = 0;
1932 if(size.flags & PAspect) {
1933 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1934 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1935 }
1936 else
1937 c->maxa = c->mina = 0.0;
1938 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1939 && c->maxw == c->minw && c->maxh == c->minh);
1940 }
1941
1942 void
1943 updatetitle(Client *c) {
1944 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1945 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1946 if(c->name[0] == '\0') /* hack to mark broken clients */
1947 strcpy(c->name, broken);
1948 }
1949
1950 void
1951 updatestatus(void) {
1952 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1953 strcpy(stext, "dwm-"VERSION);
1954 drawbar(selmon);
1955 }
1956
1957 void
1958 updatewmhints(Client *c) {
1959 XWMHints *wmh;
1960
1961 if((wmh = XGetWMHints(dpy, c->win))) {
1962 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1963 wmh->flags &= ~XUrgencyHint;
1964 XSetWMHints(dpy, c->win, wmh);
1965 }
1966 else
1967 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1968 if(wmh->flags & InputHint)
1969 c->neverfocus = !wmh->input;
1970 else
1971 c->neverfocus = False;
1972 XFree(wmh);
1973 }
1974 }
1975
1976 void
1977 view(const Arg *arg) {
1978 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1979 return;
1980 selmon->seltags ^= 1; /* toggle sel tagset */
1981 if(arg->ui & TAGMASK)
1982 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1983 arrange(selmon);
1984 }
1985
1986 Client *
1987 wintoclient(Window w) {
1988 Client *c;
1989 Monitor *m;
1990
1991 for(m = mons; m; m = m->next)
1992 for(c = m->clients; c; c = c->next)
1993 if(c->win == w)
1994 return c;
1995 return NULL;
1996 }
1997
1998 Monitor *
1999 wintomon(Window w) {
2000 int x, y;
2001 Client *c;
2002 Monitor *m;
2003
2004 if(w == root && getrootptr(&x, &y))
2005 return ptrtomon(x, y);
2006 for(m = mons; m; m = m->next)
2007 if(w == m->barwin)
2008 return m;
2009 if((c = wintoclient(w)))
2010 return c->mon;
2011 return selmon;
2012 }
2013
2014 /* There's no way to check accesses to destroyed windows, thus those cases are
2015 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2016 * default error handler, which may call exit. */
2017 int
2018 xerror(Display *dpy, XErrorEvent *ee) {
2019 if(ee->error_code == BadWindow
2020 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2021 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2022 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2023 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2024 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2025 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2026 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2027 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2028 return 0;
2029 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2030 ee->request_code, ee->error_code);
2031 return xerrorxlib(dpy, ee); /* may call exit */
2032 }
2033
2034 int
2035 xerrordummy(Display *dpy, XErrorEvent *ee) {
2036 return 0;
2037 }
2038
2039 /* Startup Error handler to check if another window manager
2040 * is already running. */
2041 int
2042 xerrorstart(Display *dpy, XErrorEvent *ee) {
2043 die("dwm: another window manager is already running\n");
2044 return -1;
2045 }
2046
2047 void
2048 zoom(const Arg *arg) {
2049 Client *c = selmon->sel;
2050
2051 if(!selmon->lt[selmon->sellt]->arrange
2052 || (selmon->sel && selmon->sel->isfloating))
2053 return;
2054 if(c == nexttiled(selmon->clients))
2055 if(!c || !(c = nexttiled(c->next)))
2056 return;
2057 pop(c);
2058 }
2059
2060 int
2061 main(int argc, char *argv[]) {
2062 if(argc == 2 && !strcmp("-v", argv[1]))
2063 die("dwm-"VERSION", © 2006-2011 dwm engineers, see LICENSE for details\n");
2064 else if(argc != 1)
2065 die("usage: dwm [-v]\n");
2066 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2067 fputs("warning: no locale support\n", stderr);
2068 if(!(dpy = XOpenDisplay(NULL)))
2069 die("dwm: cannot open display\n");
2070 checkotherwm();
2071 setup();
2072 scan();
2073 run();
2074 cleanup();
2075 XCloseDisplay(dpy);
2076 return EXIT_SUCCESS;
2077 }