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applied Peters two patches, please test hg tip, if nothing breaks this is 5.9
[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 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->x = m->mx + ev->x;
620 if(ev->value_mask & CWY)
621 c->y = m->my + ev->y;
622 if(ev->value_mask & CWWidth)
623 c->w = ev->width;
624 if(ev->value_mask & CWHeight)
625 c->h = ev->height;
626 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
627 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
628 if((c->y + c->h) > m->my + m->mh && c->isfloating)
629 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
630 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
631 configure(c);
632 if(ISVISIBLE(c))
633 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
634 }
635 else
636 configure(c);
637 }
638 else {
639 wc.x = ev->x;
640 wc.y = ev->y;
641 wc.width = ev->width;
642 wc.height = ev->height;
643 wc.border_width = ev->border_width;
644 wc.sibling = ev->above;
645 wc.stack_mode = ev->detail;
646 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
647 }
648 XSync(dpy, False);
649 }
650
651 Monitor *
652 createmon(void) {
653 Monitor *m;
654
655 if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
656 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
657 m->tagset[0] = m->tagset[1] = 1;
658 m->mfact = mfact;
659 m->showbar = showbar;
660 m->topbar = topbar;
661 m->lt[0] = &layouts[0];
662 m->lt[1] = &layouts[1 % LENGTH(layouts)];
663 strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
664 return m;
665 }
666
667 void
668 destroynotify(XEvent *e) {
669 Client *c;
670 XDestroyWindowEvent *ev = &e->xdestroywindow;
671
672 if((c = wintoclient(ev->window)))
673 unmanage(c, True);
674 }
675
676 void
677 detach(Client *c) {
678 Client **tc;
679
680 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
681 *tc = c->next;
682 }
683
684 void
685 detachstack(Client *c) {
686 Client **tc, *t;
687
688 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
689 *tc = c->snext;
690
691 if(c == c->mon->sel) {
692 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
693 c->mon->sel = t;
694 }
695 }
696
697 void
698 die(const char *errstr, ...) {
699 va_list ap;
700
701 va_start(ap, errstr);
702 vfprintf(stderr, errstr, ap);
703 va_end(ap);
704 exit(EXIT_FAILURE);
705 }
706
707 Monitor *
708 dirtomon(int dir) {
709 Monitor *m = NULL;
710
711 if(dir > 0) {
712 if(!(m = selmon->next))
713 m = mons;
714 }
715 else {
716 if(selmon == mons)
717 for(m = mons; m->next; m = m->next);
718 else
719 for(m = mons; m->next != selmon; m = m->next);
720 }
721 return m;
722 }
723
724 void
725 drawbar(Monitor *m) {
726 int x;
727 unsigned int i, occ = 0, urg = 0;
728 unsigned long *col;
729 Client *c;
730
731 for(c = m->clients; c; c = c->next) {
732 occ |= c->tags;
733 if(c->isurgent)
734 urg |= c->tags;
735 }
736 dc.x = 0;
737 for(i = 0; i < LENGTH(tags); i++) {
738 dc.w = TEXTW(tags[i]);
739 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
740 drawtext(tags[i], col, urg & 1 << i);
741 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
742 occ & 1 << i, urg & 1 << i, col);
743 dc.x += dc.w;
744 }
745 dc.w = blw = TEXTW(m->ltsymbol);
746 drawtext(m->ltsymbol, dc.norm, False);
747 dc.x += dc.w;
748 x = dc.x;
749 if(m == selmon) { /* status is only drawn on selected monitor */
750 dc.w = TEXTW(stext);
751 dc.x = m->ww - dc.w;
752 if(dc.x < x) {
753 dc.x = x;
754 dc.w = m->ww - x;
755 }
756 drawtext(stext, dc.norm, False);
757 }
758 else
759 dc.x = m->ww;
760 if((dc.w = dc.x - x) > bh) {
761 dc.x = x;
762 if(m->sel) {
763 col = m == selmon ? dc.sel : dc.norm;
764 drawtext(m->sel->name, col, False);
765 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
766 }
767 else
768 drawtext(NULL, dc.norm, False);
769 }
770 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
771 XSync(dpy, False);
772 }
773
774 void
775 drawbars(void) {
776 Monitor *m;
777
778 for(m = mons; m; m = m->next)
779 drawbar(m);
780 }
781
782 void
783 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
784 int x;
785
786 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
787 x = (dc.font.ascent + dc.font.descent + 2) / 4;
788 if(filled)
789 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x+1, x+1);
790 else if(empty)
791 XDrawRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x, x);
792 }
793
794 void
795 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
796 char buf[256];
797 int i, x, y, h, len, olen;
798
799 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
800 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x, dc.y, dc.w, dc.h);
801 if(!text)
802 return;
803 olen = strlen(text);
804 h = dc.font.ascent + dc.font.descent;
805 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
806 x = dc.x + (h / 2);
807 /* shorten text if necessary */
808 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
809 if(!len)
810 return;
811 memcpy(buf, text, len);
812 if(len < olen)
813 for(i = len; i && i > len - 3; buf[--i] = '.');
814 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
815 if(dc.font.set)
816 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
817 else
818 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
819 }
820
821 void
822 enternotify(XEvent *e) {
823 Client *c;
824 Monitor *m;
825 XCrossingEvent *ev = &e->xcrossing;
826
827 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
828 return;
829 c = wintoclient(ev->window);
830 if((m = wintomon(ev->window)) && m != selmon) {
831 unfocus(selmon->sel, True);
832 selmon = m;
833 }
834 else if(c == selmon->sel || c == NULL)
835 return;
836 focus((wintoclient(ev->window)));
837 }
838
839 void
840 expose(XEvent *e) {
841 Monitor *m;
842 XExposeEvent *ev = &e->xexpose;
843
844 if(ev->count == 0 && (m = wintomon(ev->window)))
845 drawbar(m);
846 }
847
848 void
849 focus(Client *c) {
850 if(!c || !ISVISIBLE(c))
851 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
852 /* was if(selmon->sel) */
853 if(selmon->sel && selmon->sel != c)
854 unfocus(selmon->sel, False);
855 if(c) {
856 if(c->mon != selmon)
857 selmon = c->mon;
858 if(c->isurgent)
859 clearurgent(c);
860 detachstack(c);
861 attachstack(c);
862 grabbuttons(c, True);
863 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
864 setfocus(c);
865 }
866 else
867 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
868 selmon->sel = c;
869 drawbars();
870 }
871
872 void
873 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
874 XFocusChangeEvent *ev = &e->xfocus;
875
876 if(selmon->sel && ev->window != selmon->sel->win)
877 setfocus(selmon->sel);
878 }
879
880 void
881 focusmon(const Arg *arg) {
882 Monitor *m;
883
884 if(!mons->next)
885 return;
886 if((m = dirtomon(arg->i)) == selmon)
887 return;
888 unfocus(selmon->sel, True);
889 selmon = m;
890 focus(NULL);
891 }
892
893 void
894 focusstack(const Arg *arg) {
895 Client *c = NULL, *i;
896
897 if(!selmon->sel)
898 return;
899 if(arg->i > 0) {
900 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
901 if(!c)
902 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
903 }
904 else {
905 for(i = selmon->clients; i != selmon->sel; i = i->next)
906 if(ISVISIBLE(i))
907 c = i;
908 if(!c)
909 for(; i; i = i->next)
910 if(ISVISIBLE(i))
911 c = i;
912 }
913 if(c) {
914 focus(c);
915 restack(selmon);
916 }
917 }
918
919 unsigned long
920 getcolor(const char *colstr) {
921 Colormap cmap = DefaultColormap(dpy, screen);
922 XColor color;
923
924 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
925 die("error, cannot allocate color '%s'\n", colstr);
926 return color.pixel;
927 }
928
929 Bool
930 getrootptr(int *x, int *y) {
931 int di;
932 unsigned int dui;
933 Window dummy;
934
935 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
936 }
937
938 long
939 getstate(Window w) {
940 int format;
941 long result = -1;
942 unsigned char *p = NULL;
943 unsigned long n, extra;
944 Atom real;
945
946 if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
947 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
948 return -1;
949 if(n != 0)
950 result = *p;
951 XFree(p);
952 return result;
953 }
954
955 Bool
956 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
957 char **list = NULL;
958 int n;
959 XTextProperty name;
960
961 if(!text || size == 0)
962 return False;
963 text[0] = '\0';
964 XGetTextProperty(dpy, w, &name, atom);
965 if(!name.nitems)
966 return False;
967 if(name.encoding == XA_STRING)
968 strncpy(text, (char *)name.value, size - 1);
969 else {
970 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
971 strncpy(text, *list, size - 1);
972 XFreeStringList(list);
973 }
974 }
975 text[size - 1] = '\0';
976 XFree(name.value);
977 return True;
978 }
979
980 void
981 grabbuttons(Client *c, Bool focused) {
982 updatenumlockmask();
983 {
984 unsigned int i, j;
985 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
986 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
987 if(focused) {
988 for(i = 0; i < LENGTH(buttons); i++)
989 if(buttons[i].click == ClkClientWin)
990 for(j = 0; j < LENGTH(modifiers); j++)
991 XGrabButton(dpy, buttons[i].button,
992 buttons[i].mask | modifiers[j],
993 c->win, False, BUTTONMASK,
994 GrabModeAsync, GrabModeSync, None, None);
995 }
996 else
997 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
998 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
999 }
1000 }
1001
1002 void
1003 grabkeys(void) {
1004 updatenumlockmask();
1005 {
1006 unsigned int i, j;
1007 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1008 KeyCode code;
1009
1010 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1011 for(i = 0; i < LENGTH(keys); i++) {
1012 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1013 for(j = 0; j < LENGTH(modifiers); j++)
1014 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1015 True, GrabModeAsync, GrabModeAsync);
1016 }
1017 }
1018 }
1019
1020 void
1021 initfont(const char *fontstr) {
1022 char *def, **missing;
1023 int n;
1024
1025 missing = NULL;
1026 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
1027 if(missing) {
1028 while(n--)
1029 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
1030 XFreeStringList(missing);
1031 }
1032 if(dc.font.set) {
1033 XFontStruct **xfonts;
1034 char **font_names;
1035
1036 dc.font.ascent = dc.font.descent = 0;
1037 XExtentsOfFontSet(dc.font.set);
1038 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
1039 while(n--) {
1040 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
1041 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
1042 xfonts++;
1043 }
1044 }
1045 else {
1046 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
1047 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
1048 die("error, cannot load font: '%s'\n", fontstr);
1049 dc.font.ascent = dc.font.xfont->ascent;
1050 dc.font.descent = dc.font.xfont->descent;
1051 }
1052 dc.font.height = dc.font.ascent + dc.font.descent;
1053 }
1054
1055 #ifdef XINERAMA
1056 static Bool
1057 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1058 while(n--)
1059 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1060 && unique[n].width == info->width && unique[n].height == info->height)
1061 return False;
1062 return True;
1063 }
1064 #endif /* XINERAMA */
1065
1066 void
1067 keypress(XEvent *e) {
1068 unsigned int i;
1069 KeySym keysym;
1070 XKeyEvent *ev;
1071
1072 ev = &e->xkey;
1073 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1074 for(i = 0; i < LENGTH(keys); i++)
1075 if(keysym == keys[i].keysym
1076 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1077 && keys[i].func)
1078 keys[i].func(&(keys[i].arg));
1079 }
1080
1081 void
1082 killclient(const Arg *arg) {
1083 if(!selmon->sel)
1084 return;
1085 if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1086 XGrabServer(dpy);
1087 XSetErrorHandler(xerrordummy);
1088 XSetCloseDownMode(dpy, DestroyAll);
1089 XKillClient(dpy, selmon->sel->win);
1090 XSync(dpy, False);
1091 XSetErrorHandler(xerror);
1092 XUngrabServer(dpy);
1093 }
1094 }
1095
1096 void
1097 manage(Window w, XWindowAttributes *wa) {
1098 Client *c, *t = NULL;
1099 Window trans = None;
1100 XWindowChanges wc;
1101
1102 if(!(c = calloc(1, sizeof(Client))))
1103 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1104 c->win = w;
1105 updatetitle(c);
1106 if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1107 c->mon = t->mon;
1108 c->tags = t->tags;
1109 }
1110 else {
1111 c->mon = selmon;
1112 applyrules(c);
1113 }
1114 /* geometry */
1115 c->x = c->oldx = wa->x + c->mon->wx;
1116 c->y = c->oldy = wa->y + c->mon->wy;
1117 c->w = c->oldw = wa->width;
1118 c->h = c->oldh = wa->height;
1119 c->oldbw = wa->border_width;
1120 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1121 c->isfloating = True;
1122 c->x = c->mon->mx;
1123 c->y = c->mon->my;
1124 c->bw = 0;
1125 }
1126 else {
1127 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1128 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1129 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1130 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1131 c->x = MAX(c->x, c->mon->mx);
1132 /* only fix client y-offset, if the client center might cover the bar */
1133 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1134 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1135 c->bw = borderpx;
1136 }
1137 wc.border_width = c->bw;
1138 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1139 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1140 configure(c); /* propagates border_width, if size doesn't change */
1141 updatesizehints(c);
1142 updatewmhints(c);
1143 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1144 grabbuttons(c, False);
1145 if(!c->isfloating)
1146 c->isfloating = c->oldstate = trans != None || c->isfixed;
1147 if(c->isfloating)
1148 XRaiseWindow(dpy, c->win);
1149 attach(c);
1150 attachstack(c);
1151 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1152 setclientstate(c, NormalState);
1153 arrange(c->mon);
1154 XMapWindow(dpy, c->win);
1155 focus(c);
1156 }
1157
1158 void
1159 mappingnotify(XEvent *e) {
1160 XMappingEvent *ev = &e->xmapping;
1161
1162 XRefreshKeyboardMapping(ev);
1163 if(ev->request == MappingKeyboard)
1164 grabkeys();
1165 }
1166
1167 void
1168 maprequest(XEvent *e) {
1169 static XWindowAttributes wa;
1170 XMapRequestEvent *ev = &e->xmaprequest;
1171
1172 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1173 return;
1174 if(wa.override_redirect)
1175 return;
1176 if(!wintoclient(ev->window))
1177 manage(ev->window, &wa);
1178 }
1179
1180 void
1181 monocle(Monitor *m) {
1182 unsigned int n = 0;
1183 Client *c;
1184
1185 for(c = m->clients; c; c = c->next)
1186 if(ISVISIBLE(c))
1187 n++;
1188 if(n > 0) /* override layout symbol */
1189 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1190 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1191 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1192 }
1193
1194 void
1195 movemouse(const Arg *arg) {
1196 int x, y, ocx, ocy, nx, ny;
1197 Client *c;
1198 Monitor *m;
1199 XEvent ev;
1200
1201 if(!(c = selmon->sel))
1202 return;
1203 restack(selmon);
1204 ocx = c->x;
1205 ocy = c->y;
1206 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1207 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1208 return;
1209 if(!getrootptr(&x, &y))
1210 return;
1211 do {
1212 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1213 switch(ev.type) {
1214 case ConfigureRequest:
1215 case Expose:
1216 case MapRequest:
1217 handler[ev.type](&ev);
1218 break;
1219 case MotionNotify:
1220 nx = ocx + (ev.xmotion.x - x);
1221 ny = ocy + (ev.xmotion.y - y);
1222 if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1223 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1224 if(abs(selmon->wx - nx) < snap)
1225 nx = selmon->wx;
1226 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1227 nx = selmon->wx + selmon->ww - WIDTH(c);
1228 if(abs(selmon->wy - ny) < snap)
1229 ny = selmon->wy;
1230 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1231 ny = selmon->wy + selmon->wh - HEIGHT(c);
1232 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1233 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1234 togglefloating(NULL);
1235 }
1236 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1237 resize(c, nx, ny, c->w, c->h, True);
1238 break;
1239 }
1240 } while(ev.type != ButtonRelease);
1241 XUngrabPointer(dpy, CurrentTime);
1242 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1243 sendmon(c, m);
1244 selmon = m;
1245 focus(NULL);
1246 }
1247 }
1248
1249 Client *
1250 nexttiled(Client *c) {
1251 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1252 return c;
1253 }
1254
1255 void
1256 pop(Client *c) {
1257 detach(c);
1258 attach(c);
1259 focus(c);
1260 arrange(c->mon);
1261 }
1262
1263 void
1264 propertynotify(XEvent *e) {
1265 Client *c;
1266 Window trans;
1267 XPropertyEvent *ev = &e->xproperty;
1268
1269 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1270 updatestatus();
1271 else if(ev->state == PropertyDelete)
1272 return; /* ignore */
1273 else if((c = wintoclient(ev->window))) {
1274 switch(ev->atom) {
1275 default: break;
1276 case XA_WM_TRANSIENT_FOR:
1277 if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1278 (c->isfloating = (wintoclient(trans)) != NULL))
1279 arrange(c->mon);
1280 break;
1281 case XA_WM_NORMAL_HINTS:
1282 updatesizehints(c);
1283 break;
1284 case XA_WM_HINTS:
1285 updatewmhints(c);
1286 drawbars();
1287 break;
1288 }
1289 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1290 updatetitle(c);
1291 if(c == c->mon->sel)
1292 drawbar(c->mon);
1293 }
1294 }
1295 }
1296
1297 Monitor *
1298 ptrtomon(int x, int y) {
1299 Monitor *m;
1300
1301 for(m = mons; m; m = m->next)
1302 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1303 return m;
1304 return selmon;
1305 }
1306 void
1307 quit(const Arg *arg) {
1308 running = False;
1309 }
1310
1311 void
1312 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1313 if(applysizehints(c, &x, &y, &w, &h, interact))
1314 resizeclient(c, x, y, w, h);
1315 }
1316
1317 void
1318 resizeclient(Client *c, int x, int y, int w, int h) {
1319 XWindowChanges wc;
1320
1321 c->oldx = c->x; c->x = wc.x = x;
1322 c->oldy = c->y; c->y = wc.y = y;
1323 c->oldw = c->w; c->w = wc.width = w;
1324 c->oldh = c->h; c->h = wc.height = h;
1325 wc.border_width = c->bw;
1326 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1327 configure(c);
1328 XSync(dpy, False);
1329 }
1330
1331 void
1332 resizemouse(const Arg *arg) {
1333 int ocx, ocy;
1334 int nw, nh;
1335 Client *c;
1336 Monitor *m;
1337 XEvent ev;
1338
1339 if(!(c = selmon->sel))
1340 return;
1341 restack(selmon);
1342 ocx = c->x;
1343 ocy = c->y;
1344 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1345 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1346 return;
1347 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1348 do {
1349 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1350 switch(ev.type) {
1351 case ConfigureRequest:
1352 case Expose:
1353 case MapRequest:
1354 handler[ev.type](&ev);
1355 break;
1356 case MotionNotify:
1357 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1358 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1359 if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1360 && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1361 {
1362 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1363 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1364 togglefloating(NULL);
1365 }
1366 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1367 resize(c, c->x, c->y, nw, nh, True);
1368 break;
1369 }
1370 } while(ev.type != ButtonRelease);
1371 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1372 XUngrabPointer(dpy, CurrentTime);
1373 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1374 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1375 sendmon(c, m);
1376 selmon = m;
1377 focus(NULL);
1378 }
1379 }
1380
1381 void
1382 restack(Monitor *m) {
1383 Client *c;
1384 XEvent ev;
1385 XWindowChanges wc;
1386
1387 drawbar(m);
1388 if(!m->sel)
1389 return;
1390 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1391 XRaiseWindow(dpy, m->sel->win);
1392 if(m->lt[m->sellt]->arrange) {
1393 wc.stack_mode = Below;
1394 wc.sibling = m->barwin;
1395 for(c = m->stack; c; c = c->snext)
1396 if(!c->isfloating && ISVISIBLE(c)) {
1397 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1398 wc.sibling = c->win;
1399 }
1400 }
1401 XSync(dpy, False);
1402 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1403 }
1404
1405 void
1406 run(void) {
1407 XEvent ev;
1408 /* main event loop */
1409 XSync(dpy, False);
1410 while(running && !XNextEvent(dpy, &ev)) {
1411 if(handler[ev.type])
1412 handler[ev.type](&ev); /* call handler */
1413 }
1414 }
1415
1416 void
1417 scan(void) {
1418 unsigned int i, num;
1419 Window d1, d2, *wins = NULL;
1420 XWindowAttributes wa;
1421
1422 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1423 for(i = 0; i < num; i++) {
1424 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1425 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1426 continue;
1427 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1428 manage(wins[i], &wa);
1429 }
1430 for(i = 0; i < num; i++) { /* now the transients */
1431 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1432 continue;
1433 if(XGetTransientForHint(dpy, wins[i], &d1)
1434 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1435 manage(wins[i], &wa);
1436 }
1437 if(wins)
1438 XFree(wins);
1439 }
1440 }
1441
1442 void
1443 sendmon(Client *c, Monitor *m) {
1444 if(c->mon == m)
1445 return;
1446 unfocus(c, True);
1447 detach(c);
1448 detachstack(c);
1449 c->mon = m;
1450 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1451 attach(c);
1452 attachstack(c);
1453 focus(NULL);
1454 arrange(NULL);
1455 }
1456
1457 void
1458 setclientstate(Client *c, long state) {
1459 long data[] = { state, None };
1460
1461 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1462 PropModeReplace, (unsigned char *)data, 2);
1463 }
1464
1465 Bool
1466 sendevent(Client *c, Atom proto) {
1467 int n;
1468 Atom *protocols;
1469 Bool exists = False;
1470 XEvent ev;
1471
1472 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1473 while(!exists && n--)
1474 exists = protocols[n] == proto;
1475 XFree(protocols);
1476 }
1477 if(exists) {
1478 ev.type = ClientMessage;
1479 ev.xclient.window = c->win;
1480 ev.xclient.message_type = wmatom[WMProtocols];
1481 ev.xclient.format = 32;
1482 ev.xclient.data.l[0] = proto;
1483 ev.xclient.data.l[1] = CurrentTime;
1484 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1485 }
1486 return exists;
1487 }
1488
1489 void
1490 setfocus(Client *c) {
1491 if(!c->neverfocus)
1492 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1493 sendevent(c, wmatom[WMTakeFocus]);
1494 }
1495
1496 void
1497 setlayout(const Arg *arg) {
1498 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1499 selmon->sellt ^= 1;
1500 if(arg && arg->v)
1501 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1502 strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1503 if(selmon->sel)
1504 arrange(selmon);
1505 else
1506 drawbar(selmon);
1507 }
1508
1509 /* arg > 1.0 will set mfact absolutly */
1510 void
1511 setmfact(const Arg *arg) {
1512 float f;
1513
1514 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1515 return;
1516 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1517 if(f < 0.1 || f > 0.9)
1518 return;
1519 selmon->mfact = f;
1520 arrange(selmon);
1521 }
1522
1523 void
1524 setup(void) {
1525 XSetWindowAttributes wa;
1526
1527 /* clean up any zombies immediately */
1528 sigchld(0);
1529
1530 /* init screen */
1531 screen = DefaultScreen(dpy);
1532 root = RootWindow(dpy, screen);
1533 initfont(font);
1534 sw = DisplayWidth(dpy, screen);
1535 sh = DisplayHeight(dpy, screen);
1536 bh = dc.h = dc.font.height + 2;
1537 updategeom();
1538 /* init atoms */
1539 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1540 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1541 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1542 wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1543 netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1544 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1545 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1546 netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1547 netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1548 /* init cursors */
1549 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1550 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1551 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1552 /* init appearance */
1553 dc.norm[ColBorder] = getcolor(normbordercolor);
1554 dc.norm[ColBG] = getcolor(normbgcolor);
1555 dc.norm[ColFG] = getcolor(normfgcolor);
1556 dc.sel[ColBorder] = getcolor(selbordercolor);
1557 dc.sel[ColBG] = getcolor(selbgcolor);
1558 dc.sel[ColFG] = getcolor(selfgcolor);
1559 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1560 dc.gc = XCreateGC(dpy, root, 0, NULL);
1561 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1562 if(!dc.font.set)
1563 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1564 /* init bars */
1565 updatebars();
1566 updatestatus();
1567 /* EWMH support per view */
1568 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1569 PropModeReplace, (unsigned char *) netatom, NetLast);
1570 /* select for events */
1571 wa.cursor = cursor[CurNormal];
1572 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1573 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1574 |PropertyChangeMask;
1575 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1576 XSelectInput(dpy, root, wa.event_mask);
1577 grabkeys();
1578 }
1579
1580 void
1581 showhide(Client *c) {
1582 if(!c)
1583 return;
1584 if(ISVISIBLE(c)) { /* show clients top down */
1585 XMoveWindow(dpy, c->win, c->x, c->y);
1586 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1587 resize(c, c->x, c->y, c->w, c->h, False);
1588 showhide(c->snext);
1589 }
1590 else { /* hide clients bottom up */
1591 showhide(c->snext);
1592 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1593 }
1594 }
1595
1596 void
1597 sigchld(int unused) {
1598 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1599 die("Can't install SIGCHLD handler");
1600 while(0 < waitpid(-1, NULL, WNOHANG));
1601 }
1602
1603 void
1604 spawn(const Arg *arg) {
1605 if(fork() == 0) {
1606 if(dpy)
1607 close(ConnectionNumber(dpy));
1608 setsid();
1609 execvp(((char **)arg->v)[0], (char **)arg->v);
1610 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1611 perror(" failed");
1612 exit(EXIT_SUCCESS);
1613 }
1614 }
1615
1616 void
1617 tag(const Arg *arg) {
1618 if(selmon->sel && arg->ui & TAGMASK) {
1619 selmon->sel->tags = arg->ui & TAGMASK;
1620 focus(NULL);
1621 arrange(selmon);
1622 }
1623 }
1624
1625 void
1626 tagmon(const Arg *arg) {
1627 if(!selmon->sel || !mons->next)
1628 return;
1629 sendmon(selmon->sel, dirtomon(arg->i));
1630 }
1631
1632 int
1633 textnw(const char *text, unsigned int len) {
1634 XRectangle r;
1635
1636 if(dc.font.set) {
1637 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1638 return r.width;
1639 }
1640 return XTextWidth(dc.font.xfont, text, len);
1641 }
1642
1643 void
1644 tile(Monitor *m) {
1645 int x, y, h, w, mw;
1646 unsigned int i, n;
1647 Client *c;
1648
1649 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1650 if(n == 0)
1651 return;
1652 /* master */
1653 c = nexttiled(m->clients);
1654 mw = m->mfact * m->ww;
1655 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1656 if(--n == 0)
1657 return;
1658 /* tile stack */
1659 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1660 y = m->wy;
1661 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1662 h = m->wh / n;
1663 if(h < bh)
1664 h = m->wh;
1665 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1666 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1667 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1668 if(h != m->wh)
1669 y = c->y + HEIGHT(c);
1670 }
1671 }
1672
1673 void
1674 togglebar(const Arg *arg) {
1675 selmon->showbar = !selmon->showbar;
1676 updatebarpos(selmon);
1677 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1678 arrange(selmon);
1679 }
1680
1681 void
1682 togglefloating(const Arg *arg) {
1683 if(!selmon->sel)
1684 return;
1685 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1686 if(selmon->sel->isfloating)
1687 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1688 selmon->sel->w, selmon->sel->h, False);
1689 arrange(selmon);
1690 }
1691
1692 void
1693 toggletag(const Arg *arg) {
1694 unsigned int newtags;
1695
1696 if(!selmon->sel)
1697 return;
1698 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1699 if(newtags) {
1700 selmon->sel->tags = newtags;
1701 focus(NULL);
1702 arrange(selmon);
1703 }
1704 }
1705
1706 void
1707 toggleview(const Arg *arg) {
1708 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1709
1710 if(newtagset) {
1711 selmon->tagset[selmon->seltags] = newtagset;
1712 focus(NULL);
1713 arrange(selmon);
1714 }
1715 }
1716
1717 void
1718 unfocus(Client *c, Bool setfocus) {
1719 if(!c)
1720 return;
1721 grabbuttons(c, False);
1722 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1723 if(setfocus)
1724 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1725 }
1726
1727 void
1728 unmanage(Client *c, Bool destroyed) {
1729 Monitor *m = c->mon;
1730 XWindowChanges wc;
1731
1732 /* The server grab construct avoids race conditions. */
1733 detach(c);
1734 detachstack(c);
1735 if(!destroyed) {
1736 wc.border_width = c->oldbw;
1737 XGrabServer(dpy);
1738 XSetErrorHandler(xerrordummy);
1739 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1740 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1741 setclientstate(c, WithdrawnState);
1742 XSync(dpy, False);
1743 XSetErrorHandler(xerror);
1744 XUngrabServer(dpy);
1745 }
1746 free(c);
1747 focus(NULL);
1748 arrange(m);
1749 }
1750
1751 void
1752 unmapnotify(XEvent *e) {
1753 Client *c;
1754 XUnmapEvent *ev = &e->xunmap;
1755
1756 if((c = wintoclient(ev->window)))
1757 unmanage(c, False);
1758 }
1759
1760 void
1761 updatebars(void) {
1762 Monitor *m;
1763 XSetWindowAttributes wa = {
1764 .override_redirect = True,
1765 .background_pixmap = ParentRelative,
1766 .event_mask = ButtonPressMask|ExposureMask
1767 };
1768 for(m = mons; m; m = m->next) {
1769 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1770 CopyFromParent, DefaultVisual(dpy, screen),
1771 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1772 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1773 XMapRaised(dpy, m->barwin);
1774 }
1775 }
1776
1777 void
1778 updatebarpos(Monitor *m) {
1779 m->wy = m->my;
1780 m->wh = m->mh;
1781 if(m->showbar) {
1782 m->wh -= bh;
1783 m->by = m->topbar ? m->wy : m->wy + m->wh;
1784 m->wy = m->topbar ? m->wy + bh : m->wy;
1785 }
1786 else
1787 m->by = -bh;
1788 }
1789
1790 Bool
1791 updategeom(void) {
1792 Bool dirty = False;
1793
1794 #ifdef XINERAMA
1795 if(XineramaIsActive(dpy)) {
1796 int i, j, n, nn;
1797 Client *c;
1798 Monitor *m;
1799 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1800 XineramaScreenInfo *unique = NULL;
1801
1802 for(n = 0, m = mons; m; m = m->next, n++);
1803 /* only consider unique geometries as separate screens */
1804 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
1805 die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
1806 for(i = 0, j = 0; i < nn; i++)
1807 if(isuniquegeom(unique, j, &info[i]))
1808 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1809 XFree(info);
1810 nn = j;
1811 if(n <= nn) {
1812 for(i = 0; i < (nn - n); i++) { /* new monitors available */
1813 for(m = mons; m && m->next; m = m->next);
1814 if(m)
1815 m->next = createmon();
1816 else
1817 mons = createmon();
1818 }
1819 for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1820 if(i >= n
1821 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1822 || unique[i].width != m->mw || unique[i].height != m->mh))
1823 {
1824 dirty = True;
1825 m->num = i;
1826 m->mx = m->wx = unique[i].x_org;
1827 m->my = m->wy = unique[i].y_org;
1828 m->mw = m->ww = unique[i].width;
1829 m->mh = m->wh = unique[i].height;
1830 updatebarpos(m);
1831 }
1832 }
1833 else { /* less monitors available nn < n */
1834 for(i = nn; i < n; i++) {
1835 for(m = mons; m && m->next; m = m->next);
1836 while(m->clients) {
1837 dirty = True;
1838 c = m->clients;
1839 m->clients = c->next;
1840 detachstack(c);
1841 c->mon = mons;
1842 attach(c);
1843 attachstack(c);
1844 }
1845 if(m == selmon)
1846 selmon = mons;
1847 cleanupmon(m);
1848 }
1849 }
1850 free(unique);
1851 }
1852 else
1853 #endif /* XINERAMA */
1854 /* default monitor setup */
1855 {
1856 if(!mons)
1857 mons = createmon();
1858 if(mons->mw != sw || mons->mh != sh) {
1859 dirty = True;
1860 mons->mw = mons->ww = sw;
1861 mons->mh = mons->wh = sh;
1862 updatebarpos(mons);
1863 }
1864 }
1865 if(dirty) {
1866 selmon = mons;
1867 selmon = wintomon(root);
1868 }
1869 return dirty;
1870 }
1871
1872 void
1873 updatenumlockmask(void) {
1874 unsigned int i, j;
1875 XModifierKeymap *modmap;
1876
1877 numlockmask = 0;
1878 modmap = XGetModifierMapping(dpy);
1879 for(i = 0; i < 8; i++)
1880 for(j = 0; j < modmap->max_keypermod; j++)
1881 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1882 == XKeysymToKeycode(dpy, XK_Num_Lock))
1883 numlockmask = (1 << i);
1884 XFreeModifiermap(modmap);
1885 }
1886
1887 void
1888 updatesizehints(Client *c) {
1889 long msize;
1890 XSizeHints size;
1891
1892 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1893 /* size is uninitialized, ensure that size.flags aren't used */
1894 size.flags = PSize;
1895 if(size.flags & PBaseSize) {
1896 c->basew = size.base_width;
1897 c->baseh = size.base_height;
1898 }
1899 else if(size.flags & PMinSize) {
1900 c->basew = size.min_width;
1901 c->baseh = size.min_height;
1902 }
1903 else
1904 c->basew = c->baseh = 0;
1905 if(size.flags & PResizeInc) {
1906 c->incw = size.width_inc;
1907 c->inch = size.height_inc;
1908 }
1909 else
1910 c->incw = c->inch = 0;
1911 if(size.flags & PMaxSize) {
1912 c->maxw = size.max_width;
1913 c->maxh = size.max_height;
1914 }
1915 else
1916 c->maxw = c->maxh = 0;
1917 if(size.flags & PMinSize) {
1918 c->minw = size.min_width;
1919 c->minh = size.min_height;
1920 }
1921 else if(size.flags & PBaseSize) {
1922 c->minw = size.base_width;
1923 c->minh = size.base_height;
1924 }
1925 else
1926 c->minw = c->minh = 0;
1927 if(size.flags & PAspect) {
1928 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1929 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1930 }
1931 else
1932 c->maxa = c->mina = 0.0;
1933 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1934 && c->maxw == c->minw && c->maxh == c->minh);
1935 }
1936
1937 void
1938 updatetitle(Client *c) {
1939 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1940 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1941 if(c->name[0] == '\0') /* hack to mark broken clients */
1942 strcpy(c->name, broken);
1943 }
1944
1945 void
1946 updatestatus(void) {
1947 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1948 strcpy(stext, "dwm-"VERSION);
1949 drawbar(selmon);
1950 }
1951
1952 void
1953 updatewmhints(Client *c) {
1954 XWMHints *wmh;
1955
1956 if((wmh = XGetWMHints(dpy, c->win))) {
1957 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1958 wmh->flags &= ~XUrgencyHint;
1959 XSetWMHints(dpy, c->win, wmh);
1960 }
1961 else
1962 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1963 if(wmh->flags & InputHint)
1964 c->neverfocus = !wmh->input;
1965 else
1966 c->neverfocus = False;
1967 XFree(wmh);
1968 }
1969 }
1970
1971 void
1972 view(const Arg *arg) {
1973 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1974 return;
1975 selmon->seltags ^= 1; /* toggle sel tagset */
1976 if(arg->ui & TAGMASK)
1977 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1978 focus(NULL);
1979 arrange(selmon);
1980 }
1981
1982 Client *
1983 wintoclient(Window w) {
1984 Client *c;
1985 Monitor *m;
1986
1987 for(m = mons; m; m = m->next)
1988 for(c = m->clients; c; c = c->next)
1989 if(c->win == w)
1990 return c;
1991 return NULL;
1992 }
1993
1994 Monitor *
1995 wintomon(Window w) {
1996 int x, y;
1997 Client *c;
1998 Monitor *m;
1999
2000 if(w == root && getrootptr(&x, &y))
2001 return ptrtomon(x, y);
2002 for(m = mons; m; m = m->next)
2003 if(w == m->barwin)
2004 return m;
2005 if((c = wintoclient(w)))
2006 return c->mon;
2007 return selmon;
2008 }
2009
2010 /* There's no way to check accesses to destroyed windows, thus those cases are
2011 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2012 * default error handler, which may call exit. */
2013 int
2014 xerror(Display *dpy, XErrorEvent *ee) {
2015 if(ee->error_code == BadWindow
2016 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2017 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2018 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2019 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2020 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2021 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2022 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2023 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2024 return 0;
2025 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2026 ee->request_code, ee->error_code);
2027 return xerrorxlib(dpy, ee); /* may call exit */
2028 }
2029
2030 int
2031 xerrordummy(Display *dpy, XErrorEvent *ee) {
2032 return 0;
2033 }
2034
2035 /* Startup Error handler to check if another window manager
2036 * is already running. */
2037 int
2038 xerrorstart(Display *dpy, XErrorEvent *ee) {
2039 die("dwm: another window manager is already running\n");
2040 return -1;
2041 }
2042
2043 void
2044 zoom(const Arg *arg) {
2045 Client *c = selmon->sel;
2046
2047 if(!selmon->lt[selmon->sellt]->arrange
2048 || (selmon->sel && selmon->sel->isfloating))
2049 return;
2050 if(c == nexttiled(selmon->clients))
2051 if(!c || !(c = nexttiled(c->next)))
2052 return;
2053 pop(c);
2054 }
2055
2056 int
2057 main(int argc, char *argv[]) {
2058 if(argc == 2 && !strcmp("-v", argv[1]))
2059 die("dwm-"VERSION", © 2006-2011 dwm engineers, see LICENSE for details\n");
2060 else if(argc != 1)
2061 die("usage: dwm [-v]\n");
2062 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2063 fputs("warning: no locale support\n", stderr);
2064 if(!(dpy = XOpenDisplay(NULL)))
2065 die("dwm: cannot open display\n");
2066 checkotherwm();
2067 setup();
2068 scan();
2069 run();
2070 cleanup();
2071 XCloseDisplay(dpy);
2072 return EXIT_SUCCESS;
2073 }