dwm.c (view raw)
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 */
58enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60enum { NetSupported, NetWMName, NetWMState,
61 NetWMFullscreen, NetActiveWindow, NetWMWindowType,
62 NetWMWindowTypeDialog, NetLast }; /* EWMH atoms */
63enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
64enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
65 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
66
67typedef union {
68 int i;
69 unsigned int ui;
70 float f;
71 const void *v;
72} Arg;
73
74typedef struct {
75 unsigned int click;
76 unsigned int mask;
77 unsigned int button;
78 void (*func)(const Arg *arg);
79 const Arg arg;
80} Button;
81
82typedef struct Monitor Monitor;
83typedef struct Client Client;
84struct Client {
85 char name[256];
86 float mina, maxa;
87 int x, y, w, h;
88 int oldx, oldy, oldw, oldh;
89 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
90 int bw, oldbw;
91 unsigned int tags;
92 Bool isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
93 Client *next;
94 Client *snext;
95 Monitor *mon;
96 Window win;
97};
98
99typedef struct {
100 int x, y, w, h;
101 unsigned long norm[ColLast];
102 unsigned long sel[ColLast];
103 Drawable drawable;
104 GC gc;
105 struct {
106 int ascent;
107 int descent;
108 int height;
109 XFontSet set;
110 XFontStruct *xfont;
111 } font;
112} DC; /* draw context */
113
114typedef struct {
115 unsigned int mod;
116 KeySym keysym;
117 void (*func)(const Arg *);
118 const Arg arg;
119} Key;
120
121typedef struct {
122 const char *symbol;
123 void (*arrange)(Monitor *);
124} Layout;
125
126struct Monitor {
127 char ltsymbol[16];
128 float mfact;
129 int nmaster;
130 int num;
131 int by; /* bar geometry */
132 int mx, my, mw, mh; /* screen size */
133 int wx, wy, ww, wh; /* window area */
134 unsigned int seltags;
135 unsigned int sellt;
136 unsigned int tagset[2];
137 Bool showbar;
138 Bool topbar;
139 Client *clients;
140 Client *sel;
141 Client *stack;
142 Monitor *next;
143 Window barwin;
144 const Layout *lt[2];
145};
146
147typedef struct {
148 const char *class;
149 const char *instance;
150 const char *title;
151 unsigned int tags;
152 Bool isfloating;
153 int monitor;
154} Rule;
155
156/* function declarations */
157static void applyrules(Client *c);
158static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
159static void arrange(Monitor *m);
160static void arrangemon(Monitor *m);
161static void attach(Client *c);
162static void attachstack(Client *c);
163static void buttonpress(XEvent *e);
164static void checkotherwm(void);
165static void cleanup(void);
166static void cleanupmon(Monitor *mon);
167static void clearurgent(Client *c);
168static void clientmessage(XEvent *e);
169static void configure(Client *c);
170static void configurenotify(XEvent *e);
171static void configurerequest(XEvent *e);
172static Monitor *createmon(void);
173static void destroynotify(XEvent *e);
174static void detach(Client *c);
175static void detachstack(Client *c);
176static void die(const char *errstr, ...);
177static Monitor *dirtomon(int dir);
178static void drawbar(Monitor *m);
179static void drawbars(void);
180static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
181static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
182static void enternotify(XEvent *e);
183static void expose(XEvent *e);
184static void focus(Client *c);
185static void focusin(XEvent *e);
186static void focusmon(const Arg *arg);
187static void focusstack(const Arg *arg);
188static unsigned long getcolor(const char *colstr);
189static Bool getrootptr(int *x, int *y);
190static long getstate(Window w);
191static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
192static void grabbuttons(Client *c, Bool focused);
193static void grabkeys(void);
194static void incnmaster(const Arg *arg);
195static void initfont(const char *fontstr);
196static void keypress(XEvent *e);
197static void killclient(const Arg *arg);
198static void manage(Window w, XWindowAttributes *wa);
199static void mappingnotify(XEvent *e);
200static void maprequest(XEvent *e);
201static void monocle(Monitor *m);
202static void movemouse(const Arg *arg);
203static Client *nexttiled(Client *c);
204static void pop(Client *);
205static void propertynotify(XEvent *e);
206static Monitor *ptrtomon(int x, int y);
207static void quit(const Arg *arg);
208static void resize(Client *c, int x, int y, int w, int h, Bool interact);
209static void resizeclient(Client *c, int x, int y, int w, int h);
210static void resizemouse(const Arg *arg);
211static void restack(Monitor *m);
212static void run(void);
213static void scan(void);
214static Bool sendevent(Client *c, Atom proto);
215static void sendmon(Client *c, Monitor *m);
216static void setclientstate(Client *c, long state);
217static void setfocus(Client *c);
218static void setfullscreen(Client *c, Bool fullscreen);
219static void setlayout(const Arg *arg);
220static void setmfact(const Arg *arg);
221static void setup(void);
222static void showhide(Client *c);
223static void sigchld(int unused);
224static void spawn(const Arg *arg);
225static void tag(const Arg *arg);
226static void tagmon(const Arg *arg);
227static int textnw(const char *text, unsigned int len);
228static void tile(Monitor *);
229static void togglebar(const Arg *arg);
230static void togglefloating(const Arg *arg);
231static void toggletag(const Arg *arg);
232static void toggleview(const Arg *arg);
233static void unfocus(Client *c, Bool setfocus);
234static void unmanage(Client *c, Bool destroyed);
235static void unmapnotify(XEvent *e);
236static Bool updategeom(void);
237static void updatebarpos(Monitor *m);
238static void updatebars(void);
239static void updatenumlockmask(void);
240static void updatesizehints(Client *c);
241static void updatestatus(void);
242static void updatewindowtype(Client *c);
243static void updatetitle(Client *c);
244static void updatewmhints(Client *c);
245static void view(const Arg *arg);
246static Client *wintoclient(Window w);
247static Monitor *wintomon(Window w);
248static int xerror(Display *dpy, XErrorEvent *ee);
249static int xerrordummy(Display *dpy, XErrorEvent *ee);
250static int xerrorstart(Display *dpy, XErrorEvent *ee);
251static void zoom(const Arg *arg);
252
253/* variables */
254static const char broken[] = "broken";
255static char stext[256];
256static int screen;
257static int sw, sh; /* X display screen geometry width, height */
258static int bh, blw = 0; /* bar geometry */
259static int (*xerrorxlib)(Display *, XErrorEvent *);
260static unsigned int numlockmask = 0;
261static void (*handler[LASTEvent]) (XEvent *) = {
262 [ButtonPress] = buttonpress,
263 [ClientMessage] = clientmessage,
264 [ConfigureRequest] = configurerequest,
265 [ConfigureNotify] = configurenotify,
266 [DestroyNotify] = destroynotify,
267 [EnterNotify] = enternotify,
268 [Expose] = expose,
269 [FocusIn] = focusin,
270 [KeyPress] = keypress,
271 [MappingNotify] = mappingnotify,
272 [MapRequest] = maprequest,
273 [PropertyNotify] = propertynotify,
274 [UnmapNotify] = unmapnotify
275};
276static Atom wmatom[WMLast], netatom[NetLast];
277static Bool running = True;
278static Cursor cursor[CurLast];
279static Display *dpy;
280static DC dc;
281static Monitor *mons = NULL, *selmon = NULL;
282static Window root;
283
284/* configuration, allows nested code to access above variables */
285#include "config.h"
286
287/* compile-time check if all tags fit into an unsigned int bit array. */
288struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
289
290/* function implementations */
291void
292applyrules(Client *c) {
293 const char *class, *instance;
294 unsigned int i;
295 const Rule *r;
296 Monitor *m;
297 XClassHint ch = { NULL, NULL };
298
299 /* rule matching */
300 c->isfloating = c->tags = 0;
301 XGetClassHint(dpy, c->win, &ch);
302 class = ch.res_class ? ch.res_class : broken;
303 instance = ch.res_name ? ch.res_name : broken;
304
305 for(i = 0; i < LENGTH(rules); i++) {
306 r = &rules[i];
307 if((!r->title || strstr(c->name, r->title))
308 && (!r->class || strstr(class, r->class))
309 && (!r->instance || strstr(instance, r->instance)))
310 {
311 c->isfloating = r->isfloating;
312 c->tags |= r->tags;
313 for(m = mons; m && m->num != r->monitor; m = m->next);
314 if(m)
315 c->mon = m;
316 }
317 }
318 if(ch.res_class)
319 XFree(ch.res_class);
320 if(ch.res_name)
321 XFree(ch.res_name);
322 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
323}
324
325Bool
326applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
327 Bool baseismin;
328 Monitor *m = c->mon;
329
330 /* set minimum possible */
331 *w = MAX(1, *w);
332 *h = MAX(1, *h);
333 if(interact) {
334 if(*x > sw)
335 *x = sw - WIDTH(c);
336 if(*y > sh)
337 *y = sh - HEIGHT(c);
338 if(*x + *w + 2 * c->bw < 0)
339 *x = 0;
340 if(*y + *h + 2 * c->bw < 0)
341 *y = 0;
342 }
343 else {
344 if(*x >= m->wx + m->ww)
345 *x = m->wx + m->ww - WIDTH(c);
346 if(*y >= m->wy + m->wh)
347 *y = m->wy + m->wh - HEIGHT(c);
348 if(*x + *w + 2 * c->bw <= m->wx)
349 *x = m->wx;
350 if(*y + *h + 2 * c->bw <= m->wy)
351 *y = m->wy;
352 }
353 if(*h < bh)
354 *h = bh;
355 if(*w < bh)
356 *w = bh;
357 if(resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
358 /* see last two sentences in ICCCM 4.1.2.3 */
359 baseismin = c->basew == c->minw && c->baseh == c->minh;
360 if(!baseismin) { /* temporarily remove base dimensions */
361 *w -= c->basew;
362 *h -= c->baseh;
363 }
364 /* adjust for aspect limits */
365 if(c->mina > 0 && c->maxa > 0) {
366 if(c->maxa < (float)*w / *h)
367 *w = *h * c->maxa + 0.5;
368 else if(c->mina < (float)*h / *w)
369 *h = *w * c->mina + 0.5;
370 }
371 if(baseismin) { /* increment calculation requires this */
372 *w -= c->basew;
373 *h -= c->baseh;
374 }
375 /* adjust for increment value */
376 if(c->incw)
377 *w -= *w % c->incw;
378 if(c->inch)
379 *h -= *h % c->inch;
380 /* restore base dimensions */
381 *w = MAX(*w + c->basew, c->minw);
382 *h = MAX(*h + c->baseh, c->minh);
383 if(c->maxw)
384 *w = MIN(*w, c->maxw);
385 if(c->maxh)
386 *h = MIN(*h, c->maxh);
387 }
388 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
389}
390
391void
392arrange(Monitor *m) {
393 if(m)
394 showhide(m->stack);
395 else for(m = mons; m; m = m->next)
396 showhide(m->stack);
397 if(m)
398 arrangemon(m);
399 else for(m = mons; m; m = m->next)
400 arrangemon(m);
401}
402
403void
404arrangemon(Monitor *m) {
405 strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
406 if(m->lt[m->sellt]->arrange)
407 m->lt[m->sellt]->arrange(m);
408 restack(m);
409}
410
411void
412attach(Client *c) {
413 c->next = c->mon->clients;
414 c->mon->clients = c;
415}
416
417void
418attachstack(Client *c) {
419 c->snext = c->mon->stack;
420 c->mon->stack = c;
421}
422
423void
424buttonpress(XEvent *e) {
425 unsigned int i, x, click;
426 Arg arg = {0};
427 Client *c;
428 Monitor *m;
429 XButtonPressedEvent *ev = &e->xbutton;
430
431 click = ClkRootWin;
432 /* focus monitor if necessary */
433 if((m = wintomon(ev->window)) && m != selmon) {
434 unfocus(selmon->sel, True);
435 selmon = m;
436 focus(NULL);
437 }
438 if(ev->window == selmon->barwin) {
439 i = x = 0;
440 do
441 x += TEXTW(tags[i]);
442 while(ev->x >= x && ++i < LENGTH(tags));
443 if(i < LENGTH(tags)) {
444 click = ClkTagBar;
445 arg.ui = 1 << i;
446 }
447 else if(ev->x < x + blw)
448 click = ClkLtSymbol;
449 else if(ev->x > selmon->ww - TEXTW(stext))
450 click = ClkStatusText;
451 else
452 click = ClkWinTitle;
453 }
454 else if((c = wintoclient(ev->window))) {
455 focus(c);
456 click = ClkClientWin;
457 }
458 for(i = 0; i < LENGTH(buttons); i++)
459 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
460 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
461 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
462}
463
464void
465checkotherwm(void) {
466 xerrorxlib = XSetErrorHandler(xerrorstart);
467 /* this causes an error if some other window manager is running */
468 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
469 XSync(dpy, False);
470 XSetErrorHandler(xerror);
471 XSync(dpy, False);
472}
473
474void
475cleanup(void) {
476 Arg a = {.ui = ~0};
477 Layout foo = { "", NULL };
478 Monitor *m;
479
480 view(&a);
481 selmon->lt[selmon->sellt] = &foo;
482 for(m = mons; m; m = m->next)
483 while(m->stack)
484 unmanage(m->stack, False);
485 if(dc.font.set)
486 XFreeFontSet(dpy, dc.font.set);
487 else
488 XFreeFont(dpy, dc.font.xfont);
489 XUngrabKey(dpy, AnyKey, AnyModifier, root);
490 XFreePixmap(dpy, dc.drawable);
491 XFreeGC(dpy, dc.gc);
492 XFreeCursor(dpy, cursor[CurNormal]);
493 XFreeCursor(dpy, cursor[CurResize]);
494 XFreeCursor(dpy, cursor[CurMove]);
495 while(mons)
496 cleanupmon(mons);
497 XSync(dpy, False);
498 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
499}
500
501void
502cleanupmon(Monitor *mon) {
503 Monitor *m;
504
505 if(mon == mons)
506 mons = mons->next;
507 else {
508 for(m = mons; m && m->next != mon; m = m->next);
509 m->next = mon->next;
510 }
511 XUnmapWindow(dpy, mon->barwin);
512 XDestroyWindow(dpy, mon->barwin);
513 free(mon);
514}
515
516void
517clearurgent(Client *c) {
518 XWMHints *wmh;
519
520 c->isurgent = False;
521 if(!(wmh = XGetWMHints(dpy, c->win)))
522 return;
523 wmh->flags &= ~XUrgencyHint;
524 XSetWMHints(dpy, c->win, wmh);
525 XFree(wmh);
526}
527
528void
529clientmessage(XEvent *e) {
530 XClientMessageEvent *cme = &e->xclient;
531 Client *c = wintoclient(cme->window);
532
533 if(!c)
534 return;
535 if(cme->message_type == netatom[NetWMState]) {
536 if(cme->data.l[1] == netatom[NetWMFullscreen] || cme->data.l[2] == netatom[NetWMFullscreen])
537 setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD */
538 || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
539 }
540 else if(cme->message_type == netatom[NetActiveWindow]) {
541 if(!ISVISIBLE(c)) {
542 c->mon->seltags ^= 1;
543 c->mon->tagset[c->mon->seltags] = c->tags;
544 }
545 pop(c);
546 }
547}
548
549void
550configure(Client *c) {
551 XConfigureEvent ce;
552
553 ce.type = ConfigureNotify;
554 ce.display = dpy;
555 ce.event = c->win;
556 ce.window = c->win;
557 ce.x = c->x;
558 ce.y = c->y;
559 ce.width = c->w;
560 ce.height = c->h;
561 ce.border_width = c->bw;
562 ce.above = None;
563 ce.override_redirect = False;
564 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
565}
566
567void
568configurenotify(XEvent *e) {
569 Monitor *m;
570 XConfigureEvent *ev = &e->xconfigure;
571 Bool dirty;
572
573 if(ev->window == root) {
574 dirty = (sw != ev->width);
575 sw = ev->width;
576 sh = ev->height;
577 if(updategeom() || dirty) {
578 if(dc.drawable != 0)
579 XFreePixmap(dpy, dc.drawable);
580 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
581 updatebars();
582 for(m = mons; m; m = m->next)
583 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
584 focus(NULL);
585 arrange(NULL);
586 }
587 }
588}
589
590void
591configurerequest(XEvent *e) {
592 Client *c;
593 Monitor *m;
594 XConfigureRequestEvent *ev = &e->xconfigurerequest;
595 XWindowChanges wc;
596
597 if((c = wintoclient(ev->window))) {
598 if(ev->value_mask & CWBorderWidth)
599 c->bw = ev->border_width;
600 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
601 m = c->mon;
602 if(ev->value_mask & CWX) {
603 c->oldx = c->x;
604 c->x = m->mx + ev->x;
605 }
606 if(ev->value_mask & CWY) {
607 c->oldy = c->y;
608 c->y = m->my + ev->y;
609 }
610 if(ev->value_mask & CWWidth) {
611 c->oldw = c->w;
612 c->w = ev->width;
613 }
614 if(ev->value_mask & CWHeight) {
615 c->oldh = c->h;
616 c->h = ev->height;
617 }
618 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
619 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
620 if((c->y + c->h) > m->my + m->mh && c->isfloating)
621 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
622 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
623 configure(c);
624 if(ISVISIBLE(c))
625 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
626 }
627 else
628 configure(c);
629 }
630 else {
631 wc.x = ev->x;
632 wc.y = ev->y;
633 wc.width = ev->width;
634 wc.height = ev->height;
635 wc.border_width = ev->border_width;
636 wc.sibling = ev->above;
637 wc.stack_mode = ev->detail;
638 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
639 }
640 XSync(dpy, False);
641}
642
643Monitor *
644createmon(void) {
645 Monitor *m;
646
647 if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
648 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
649 m->tagset[0] = m->tagset[1] = 1;
650 m->mfact = mfact;
651 m->nmaster = nmaster;
652 m->showbar = showbar;
653 m->topbar = topbar;
654 m->lt[0] = &layouts[0];
655 m->lt[1] = &layouts[1 % LENGTH(layouts)];
656 strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
657 return m;
658}
659
660void
661destroynotify(XEvent *e) {
662 Client *c;
663 XDestroyWindowEvent *ev = &e->xdestroywindow;
664
665 if((c = wintoclient(ev->window)))
666 unmanage(c, True);
667}
668
669void
670detach(Client *c) {
671 Client **tc;
672
673 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
674 *tc = c->next;
675}
676
677void
678detachstack(Client *c) {
679 Client **tc, *t;
680
681 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
682 *tc = c->snext;
683
684 if(c == c->mon->sel) {
685 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
686 c->mon->sel = t;
687 }
688}
689
690void
691die(const char *errstr, ...) {
692 va_list ap;
693
694 va_start(ap, errstr);
695 vfprintf(stderr, errstr, ap);
696 va_end(ap);
697 exit(EXIT_FAILURE);
698}
699
700Monitor *
701dirtomon(int dir) {
702 Monitor *m = NULL;
703
704 if(dir > 0) {
705 if(!(m = selmon->next))
706 m = mons;
707 }
708 else if(selmon == mons)
709 for(m = mons; m->next; m = m->next);
710 else
711 for(m = mons; m->next != selmon; m = m->next);
712 return m;
713}
714
715void
716drawbar(Monitor *m) {
717 int x;
718 unsigned int i, occ = 0, urg = 0;
719 unsigned long *col;
720 Client *c;
721
722 for(c = m->clients; c; c = c->next) {
723 occ |= c->tags;
724 if(c->isurgent)
725 urg |= c->tags;
726 }
727 dc.x = 0;
728 for(i = 0; i < LENGTH(tags); i++) {
729 dc.w = TEXTW(tags[i]);
730 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
731 drawtext(tags[i], col, urg & 1 << i);
732 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
733 occ & 1 << i, urg & 1 << i, col);
734 dc.x += dc.w;
735 }
736 dc.w = blw = TEXTW(m->ltsymbol);
737 drawtext(m->ltsymbol, dc.norm, False);
738 dc.x += dc.w;
739 x = dc.x;
740 if(m == selmon) { /* status is only drawn on selected monitor */
741 dc.w = TEXTW(stext);
742 dc.x = m->ww - dc.w;
743 if(dc.x < x) {
744 dc.x = x;
745 dc.w = m->ww - x;
746 }
747 drawtext(stext, dc.norm, False);
748 }
749 else
750 dc.x = m->ww;
751 if((dc.w = dc.x - x) > bh) {
752 dc.x = x;
753 if(m->sel) {
754 col = m == selmon ? dc.sel : dc.norm;
755 drawtext(m->sel->name, col, False);
756 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
757 }
758 else
759 drawtext(NULL, dc.norm, False);
760 }
761 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
762 XSync(dpy, False);
763}
764
765void
766drawbars(void) {
767 Monitor *m;
768
769 for(m = mons; m; m = m->next)
770 drawbar(m);
771}
772
773void
774drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
775 int x;
776
777 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
778 x = (dc.font.ascent + dc.font.descent + 2) / 4;
779 if(filled)
780 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x+1, x+1);
781 else if(empty)
782 XDrawRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x, x);
783}
784
785void
786drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
787 char buf[256];
788 int i, x, y, h, len, olen;
789
790 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
791 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x, dc.y, dc.w, dc.h);
792 if(!text)
793 return;
794 olen = strlen(text);
795 h = dc.font.ascent + dc.font.descent;
796 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
797 x = dc.x + (h / 2);
798 /* shorten text if necessary */
799 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
800 if(!len)
801 return;
802 memcpy(buf, text, len);
803 if(len < olen)
804 for(i = len; i && i > len - 3; buf[--i] = '.');
805 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
806 if(dc.font.set)
807 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
808 else
809 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
810}
811
812void
813enternotify(XEvent *e) {
814 Client *c;
815 Monitor *m;
816 XCrossingEvent *ev = &e->xcrossing;
817
818 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
819 return;
820 c = wintoclient(ev->window);
821 m = c ? c->mon : wintomon(ev->window);
822 if(m != selmon) {
823 unfocus(selmon->sel, True);
824 selmon = m;
825 }
826 else if(!c || c == selmon->sel)
827 return;
828 focus(c);
829}
830
831void
832expose(XEvent *e) {
833 Monitor *m;
834 XExposeEvent *ev = &e->xexpose;
835
836 if(ev->count == 0 && (m = wintomon(ev->window)))
837 drawbar(m);
838}
839
840void
841focus(Client *c) {
842 if(!c || !ISVISIBLE(c))
843 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
844 /* was if(selmon->sel) */
845 if(selmon->sel && selmon->sel != c)
846 unfocus(selmon->sel, False);
847 if(c) {
848 if(c->mon != selmon)
849 selmon = c->mon;
850 if(c->isurgent)
851 clearurgent(c);
852 detachstack(c);
853 attachstack(c);
854 grabbuttons(c, True);
855 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
856 setfocus(c);
857 }
858 else
859 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
860 selmon->sel = c;
861 drawbars();
862}
863
864void
865focusin(XEvent *e) { /* there are some broken focus acquiring clients */
866 XFocusChangeEvent *ev = &e->xfocus;
867
868 if(selmon->sel && ev->window != selmon->sel->win)
869 setfocus(selmon->sel);
870}
871
872void
873focusmon(const Arg *arg) {
874 Monitor *m;
875
876 if(!mons->next)
877 return;
878 if((m = dirtomon(arg->i)) == selmon)
879 return;
880 unfocus(selmon->sel, True);
881 selmon = m;
882 focus(NULL);
883}
884
885void
886focusstack(const Arg *arg) {
887 Client *c = NULL, *i;
888
889 if(!selmon->sel)
890 return;
891 if(arg->i > 0) {
892 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
893 if(!c)
894 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
895 }
896 else {
897 for(i = selmon->clients; i != selmon->sel; i = i->next)
898 if(ISVISIBLE(i))
899 c = i;
900 if(!c)
901 for(; i; i = i->next)
902 if(ISVISIBLE(i))
903 c = i;
904 }
905 if(c) {
906 focus(c);
907 restack(selmon);
908 }
909}
910
911Atom
912getatomprop(Client *c, Atom prop) {
913 int di;
914 unsigned long dl;
915 unsigned char *p = NULL;
916 Atom da, atom = None;
917
918 if(XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
919 &da, &di, &dl, &dl, &p) == Success && p) {
920 atom = *(Atom *)p;
921 XFree(p);
922 }
923 return atom;
924}
925
926unsigned long
927getcolor(const char *colstr) {
928 Colormap cmap = DefaultColormap(dpy, screen);
929 XColor color;
930
931 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
932 die("error, cannot allocate color '%s'\n", colstr);
933 return color.pixel;
934}
935
936Bool
937getrootptr(int *x, int *y) {
938 int di;
939 unsigned int dui;
940 Window dummy;
941
942 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
943}
944
945long
946getstate(Window w) {
947 int format;
948 long result = -1;
949 unsigned char *p = NULL;
950 unsigned long n, extra;
951 Atom real;
952
953 if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
954 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
955 return -1;
956 if(n != 0)
957 result = *p;
958 XFree(p);
959 return result;
960}
961
962Bool
963gettextprop(Window w, Atom atom, char *text, unsigned int size) {
964 char **list = NULL;
965 int n;
966 XTextProperty name;
967
968 if(!text || size == 0)
969 return False;
970 text[0] = '\0';
971 XGetTextProperty(dpy, w, &name, atom);
972 if(!name.nitems)
973 return False;
974 if(name.encoding == XA_STRING)
975 strncpy(text, (char *)name.value, size - 1);
976 else {
977 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
978 strncpy(text, *list, size - 1);
979 XFreeStringList(list);
980 }
981 }
982 text[size - 1] = '\0';
983 XFree(name.value);
984 return True;
985}
986
987void
988grabbuttons(Client *c, Bool focused) {
989 updatenumlockmask();
990 {
991 unsigned int i, j;
992 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
993 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
994 if(focused) {
995 for(i = 0; i < LENGTH(buttons); i++)
996 if(buttons[i].click == ClkClientWin)
997 for(j = 0; j < LENGTH(modifiers); j++)
998 XGrabButton(dpy, buttons[i].button,
999 buttons[i].mask | modifiers[j],
1000 c->win, False, BUTTONMASK,
1001 GrabModeAsync, GrabModeSync, None, None);
1002 }
1003 else
1004 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
1005 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
1006 }
1007}
1008
1009void
1010grabkeys(void) {
1011 updatenumlockmask();
1012 {
1013 unsigned int i, j;
1014 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1015 KeyCode code;
1016
1017 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1018 for(i = 0; i < LENGTH(keys); i++)
1019 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1020 for(j = 0; j < LENGTH(modifiers); j++)
1021 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1022 True, GrabModeAsync, GrabModeAsync);
1023 }
1024}
1025
1026void
1027incnmaster(const Arg *arg) {
1028 selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
1029 arrange(selmon);
1030}
1031
1032void
1033initfont(const char *fontstr) {
1034 char *def, **missing;
1035 int n;
1036
1037 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
1038 if(missing) {
1039 while(n--)
1040 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
1041 XFreeStringList(missing);
1042 }
1043 if(dc.font.set) {
1044 XFontStruct **xfonts;
1045 char **font_names;
1046
1047 dc.font.ascent = dc.font.descent = 0;
1048 XExtentsOfFontSet(dc.font.set);
1049 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
1050 while(n--) {
1051 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
1052 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
1053 xfonts++;
1054 }
1055 }
1056 else {
1057 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
1058 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
1059 die("error, cannot load font: '%s'\n", fontstr);
1060 dc.font.ascent = dc.font.xfont->ascent;
1061 dc.font.descent = dc.font.xfont->descent;
1062 }
1063 dc.font.height = dc.font.ascent + dc.font.descent;
1064}
1065
1066#ifdef XINERAMA
1067static Bool
1068isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1069 while(n--)
1070 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1071 && unique[n].width == info->width && unique[n].height == info->height)
1072 return False;
1073 return True;
1074}
1075#endif /* XINERAMA */
1076
1077void
1078keypress(XEvent *e) {
1079 unsigned int i;
1080 KeySym keysym;
1081 XKeyEvent *ev;
1082
1083 ev = &e->xkey;
1084 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1085 for(i = 0; i < LENGTH(keys); i++)
1086 if(keysym == keys[i].keysym
1087 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1088 && keys[i].func)
1089 keys[i].func(&(keys[i].arg));
1090}
1091
1092void
1093killclient(const Arg *arg) {
1094 if(!selmon->sel)
1095 return;
1096 if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1097 XGrabServer(dpy);
1098 XSetErrorHandler(xerrordummy);
1099 XSetCloseDownMode(dpy, DestroyAll);
1100 XKillClient(dpy, selmon->sel->win);
1101 XSync(dpy, False);
1102 XSetErrorHandler(xerror);
1103 XUngrabServer(dpy);
1104 }
1105}
1106
1107void
1108manage(Window w, XWindowAttributes *wa) {
1109 Client *c, *t = NULL;
1110 Window trans = None;
1111 XWindowChanges wc;
1112
1113 if(!(c = calloc(1, sizeof(Client))))
1114 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1115 c->win = w;
1116 updatetitle(c);
1117 if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1118 c->mon = t->mon;
1119 c->tags = t->tags;
1120 }
1121 else {
1122 c->mon = selmon;
1123 applyrules(c);
1124 }
1125 /* geometry */
1126 c->x = c->oldx = wa->x;
1127 c->y = c->oldy = wa->y;
1128 c->w = c->oldw = wa->width;
1129 c->h = c->oldh = wa->height;
1130 c->oldbw = wa->border_width;
1131
1132 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1133 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1134 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1135 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1136 c->x = MAX(c->x, c->mon->mx);
1137 /* only fix client y-offset, if the client center might cover the bar */
1138 c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1139 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1140 c->bw = borderpx;
1141
1142 wc.border_width = c->bw;
1143 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1144 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1145 configure(c); /* propagates border_width, if size doesn't change */
1146 updatewindowtype(c);
1147 updatesizehints(c);
1148 updatewmhints(c);
1149 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1150 grabbuttons(c, False);
1151 if(!c->isfloating)
1152 c->isfloating = c->oldstate = trans != None || c->isfixed;
1153 if(c->isfloating)
1154 XRaiseWindow(dpy, c->win);
1155 attach(c);
1156 attachstack(c);
1157 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1158 setclientstate(c, NormalState);
1159 if (c->mon == selmon)
1160 unfocus(selmon->sel, False);
1161 c->mon->sel = c;
1162 arrange(c->mon);
1163 XMapWindow(dpy, c->win);
1164 focus(NULL);
1165}
1166
1167void
1168mappingnotify(XEvent *e) {
1169 XMappingEvent *ev = &e->xmapping;
1170
1171 XRefreshKeyboardMapping(ev);
1172 if(ev->request == MappingKeyboard)
1173 grabkeys();
1174}
1175
1176void
1177maprequest(XEvent *e) {
1178 static XWindowAttributes wa;
1179 XMapRequestEvent *ev = &e->xmaprequest;
1180
1181 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1182 return;
1183 if(wa.override_redirect)
1184 return;
1185 if(!wintoclient(ev->window))
1186 manage(ev->window, &wa);
1187}
1188
1189void
1190monocle(Monitor *m) {
1191 unsigned int n = 0;
1192 Client *c;
1193
1194 for(c = m->clients; c; c = c->next)
1195 if(ISVISIBLE(c))
1196 n++;
1197 if(n > 0) /* override layout symbol */
1198 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1199 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1200 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1201}
1202
1203void
1204movemouse(const Arg *arg) {
1205 int x, y, ocx, ocy, nx, ny;
1206 Client *c;
1207 Monitor *m;
1208 XEvent ev;
1209
1210 if(!(c = selmon->sel))
1211 return;
1212 restack(selmon);
1213 ocx = c->x;
1214 ocy = c->y;
1215 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1216 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1217 return;
1218 if(!getrootptr(&x, &y))
1219 return;
1220 do {
1221 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1222 switch(ev.type) {
1223 case ConfigureRequest:
1224 case Expose:
1225 case MapRequest:
1226 handler[ev.type](&ev);
1227 break;
1228 case MotionNotify:
1229 nx = ocx + (ev.xmotion.x - x);
1230 ny = ocy + (ev.xmotion.y - y);
1231 if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1232 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1233 if(abs(selmon->wx - nx) < snap)
1234 nx = selmon->wx;
1235 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1236 nx = selmon->wx + selmon->ww - WIDTH(c);
1237 if(abs(selmon->wy - ny) < snap)
1238 ny = selmon->wy;
1239 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1240 ny = selmon->wy + selmon->wh - HEIGHT(c);
1241 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1242 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1243 togglefloating(NULL);
1244 }
1245 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1246 resize(c, nx, ny, c->w, c->h, True);
1247 break;
1248 }
1249 } while(ev.type != ButtonRelease);
1250 XUngrabPointer(dpy, CurrentTime);
1251 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1252 sendmon(c, m);
1253 selmon = m;
1254 focus(NULL);
1255 }
1256}
1257
1258Client *
1259nexttiled(Client *c) {
1260 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1261 return c;
1262}
1263
1264void
1265pop(Client *c) {
1266 detach(c);
1267 attach(c);
1268 focus(c);
1269 arrange(c->mon);
1270}
1271
1272void
1273propertynotify(XEvent *e) {
1274 Client *c;
1275 Window trans;
1276 XPropertyEvent *ev = &e->xproperty;
1277
1278 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1279 updatestatus();
1280 else if(ev->state == PropertyDelete)
1281 return; /* ignore */
1282 else if((c = wintoclient(ev->window))) {
1283 switch(ev->atom) {
1284 default: break;
1285 case XA_WM_TRANSIENT_FOR:
1286 if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1287 (c->isfloating = (wintoclient(trans)) != NULL))
1288 arrange(c->mon);
1289 break;
1290 case XA_WM_NORMAL_HINTS:
1291 updatesizehints(c);
1292 break;
1293 case XA_WM_HINTS:
1294 updatewmhints(c);
1295 drawbars();
1296 break;
1297 }
1298 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1299 updatetitle(c);
1300 if(c == c->mon->sel)
1301 drawbar(c->mon);
1302 }
1303 if(ev->atom == netatom[NetWMWindowType])
1304 updatewindowtype(c);
1305 }
1306}
1307
1308Monitor *
1309ptrtomon(int x, int y) {
1310 Monitor *m;
1311
1312 for(m = mons; m; m = m->next)
1313 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1314 return m;
1315 return selmon;
1316}
1317
1318void
1319quit(const Arg *arg) {
1320 running = False;
1321}
1322
1323void
1324resize(Client *c, int x, int y, int w, int h, Bool interact) {
1325 if(applysizehints(c, &x, &y, &w, &h, interact))
1326 resizeclient(c, x, y, w, h);
1327}
1328
1329void
1330resizeclient(Client *c, int x, int y, int w, int h) {
1331 XWindowChanges wc;
1332
1333 c->oldx = c->x; c->x = wc.x = x;
1334 c->oldy = c->y; c->y = wc.y = y;
1335 c->oldw = c->w; c->w = wc.width = w;
1336 c->oldh = c->h; c->h = wc.height = h;
1337 wc.border_width = c->bw;
1338 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1339 configure(c);
1340 XSync(dpy, False);
1341}
1342
1343void
1344resizemouse(const Arg *arg) {
1345 int ocx, ocy;
1346 int nw, nh;
1347 Client *c;
1348 Monitor *m;
1349 XEvent ev;
1350
1351 if(!(c = selmon->sel))
1352 return;
1353 restack(selmon);
1354 ocx = c->x;
1355 ocy = c->y;
1356 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1357 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1358 return;
1359 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1360 do {
1361 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1362 switch(ev.type) {
1363 case ConfigureRequest:
1364 case Expose:
1365 case MapRequest:
1366 handler[ev.type](&ev);
1367 break;
1368 case MotionNotify:
1369 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1370 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1371 if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1372 && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1373 {
1374 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1375 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1376 togglefloating(NULL);
1377 }
1378 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1379 resize(c, c->x, c->y, nw, nh, True);
1380 break;
1381 }
1382 } while(ev.type != ButtonRelease);
1383 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1384 XUngrabPointer(dpy, CurrentTime);
1385 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1386 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1387 sendmon(c, m);
1388 selmon = m;
1389 focus(NULL);
1390 }
1391}
1392
1393void
1394restack(Monitor *m) {
1395 Client *c;
1396 XEvent ev;
1397 XWindowChanges wc;
1398
1399 drawbar(m);
1400 if(!m->sel)
1401 return;
1402 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1403 XRaiseWindow(dpy, m->sel->win);
1404 if(m->lt[m->sellt]->arrange) {
1405 wc.stack_mode = Below;
1406 wc.sibling = m->barwin;
1407 for(c = m->stack; c; c = c->snext)
1408 if(!c->isfloating && ISVISIBLE(c)) {
1409 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1410 wc.sibling = c->win;
1411 }
1412 }
1413 XSync(dpy, False);
1414 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1415}
1416
1417void
1418run(void) {
1419 XEvent ev;
1420 /* main event loop */
1421 XSync(dpy, False);
1422 while(running && !XNextEvent(dpy, &ev))
1423 if(handler[ev.type])
1424 handler[ev.type](&ev); /* call handler */
1425}
1426
1427void
1428scan(void) {
1429 unsigned int i, num;
1430 Window d1, d2, *wins = NULL;
1431 XWindowAttributes wa;
1432
1433 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1434 for(i = 0; i < num; i++) {
1435 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1436 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1437 continue;
1438 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1439 manage(wins[i], &wa);
1440 }
1441 for(i = 0; i < num; i++) { /* now the transients */
1442 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1443 continue;
1444 if(XGetTransientForHint(dpy, wins[i], &d1)
1445 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1446 manage(wins[i], &wa);
1447 }
1448 if(wins)
1449 XFree(wins);
1450 }
1451}
1452
1453void
1454sendmon(Client *c, Monitor *m) {
1455 if(c->mon == m)
1456 return;
1457 unfocus(c, True);
1458 detach(c);
1459 detachstack(c);
1460 c->mon = m;
1461 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1462 attach(c);
1463 attachstack(c);
1464 focus(NULL);
1465 arrange(NULL);
1466}
1467
1468void
1469setclientstate(Client *c, long state) {
1470 long data[] = { state, None };
1471
1472 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1473 PropModeReplace, (unsigned char *)data, 2);
1474}
1475
1476Bool
1477sendevent(Client *c, Atom proto) {
1478 int n;
1479 Atom *protocols;
1480 Bool exists = False;
1481 XEvent ev;
1482
1483 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1484 while(!exists && n--)
1485 exists = protocols[n] == proto;
1486 XFree(protocols);
1487 }
1488 if(exists) {
1489 ev.type = ClientMessage;
1490 ev.xclient.window = c->win;
1491 ev.xclient.message_type = wmatom[WMProtocols];
1492 ev.xclient.format = 32;
1493 ev.xclient.data.l[0] = proto;
1494 ev.xclient.data.l[1] = CurrentTime;
1495 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1496 }
1497 return exists;
1498}
1499
1500void
1501setfocus(Client *c) {
1502 if(!c->neverfocus)
1503 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1504 sendevent(c, wmatom[WMTakeFocus]);
1505}
1506
1507void
1508setfullscreen(Client *c, Bool fullscreen) {
1509 if(fullscreen) {
1510 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1511 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1512 c->isfullscreen = True;
1513 c->oldstate = c->isfloating;
1514 c->oldbw = c->bw;
1515 c->bw = 0;
1516 c->isfloating = True;
1517 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1518 XRaiseWindow(dpy, c->win);
1519 }
1520 else {
1521 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1522 PropModeReplace, (unsigned char*)0, 0);
1523 c->isfullscreen = False;
1524 c->isfloating = c->oldstate;
1525 c->bw = c->oldbw;
1526 c->x = c->oldx;
1527 c->y = c->oldy;
1528 c->w = c->oldw;
1529 c->h = c->oldh;
1530 resizeclient(c, c->x, c->y, c->w, c->h);
1531 arrange(c->mon);
1532 }
1533}
1534
1535void
1536setlayout(const Arg *arg) {
1537 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1538 selmon->sellt ^= 1;
1539 if(arg && arg->v)
1540 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1541 strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1542 if(selmon->sel)
1543 arrange(selmon);
1544 else
1545 drawbar(selmon);
1546}
1547
1548/* arg > 1.0 will set mfact absolutly */
1549void
1550setmfact(const Arg *arg) {
1551 float f;
1552
1553 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1554 return;
1555 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1556 if(f < 0.1 || f > 0.9)
1557 return;
1558 selmon->mfact = f;
1559 arrange(selmon);
1560}
1561
1562void
1563setup(void) {
1564 XSetWindowAttributes wa;
1565
1566 /* clean up any zombies immediately */
1567 sigchld(0);
1568
1569 /* init screen */
1570 screen = DefaultScreen(dpy);
1571 root = RootWindow(dpy, screen);
1572 initfont(font);
1573 sw = DisplayWidth(dpy, screen);
1574 sh = DisplayHeight(dpy, screen);
1575 bh = dc.h = dc.font.height + 2;
1576 updategeom();
1577 /* init atoms */
1578 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1579 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1580 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1581 wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1582 netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1583 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1584 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1585 netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1586 netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1587 netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1588 netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1589 /* init cursors */
1590 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1591 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1592 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1593 /* init appearance */
1594 dc.norm[ColBorder] = getcolor(normbordercolor);
1595 dc.norm[ColBG] = getcolor(normbgcolor);
1596 dc.norm[ColFG] = getcolor(normfgcolor);
1597 dc.sel[ColBorder] = getcolor(selbordercolor);
1598 dc.sel[ColBG] = getcolor(selbgcolor);
1599 dc.sel[ColFG] = getcolor(selfgcolor);
1600 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1601 dc.gc = XCreateGC(dpy, root, 0, NULL);
1602 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1603 if(!dc.font.set)
1604 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1605 /* init bars */
1606 updatebars();
1607 updatestatus();
1608 /* EWMH support per view */
1609 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1610 PropModeReplace, (unsigned char *) netatom, NetLast);
1611 /* select for events */
1612 wa.cursor = cursor[CurNormal];
1613 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1614 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1615 |PropertyChangeMask;
1616 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1617 XSelectInput(dpy, root, wa.event_mask);
1618 grabkeys();
1619}
1620
1621void
1622showhide(Client *c) {
1623 if(!c)
1624 return;
1625 if(ISVISIBLE(c)) { /* show clients top down */
1626 XMoveWindow(dpy, c->win, c->x, c->y);
1627 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1628 resize(c, c->x, c->y, c->w, c->h, False);
1629 showhide(c->snext);
1630 }
1631 else { /* hide clients bottom up */
1632 showhide(c->snext);
1633 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1634 }
1635}
1636
1637void
1638sigchld(int unused) {
1639 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1640 die("Can't install SIGCHLD handler");
1641 while(0 < waitpid(-1, NULL, WNOHANG));
1642}
1643
1644void
1645spawn(const Arg *arg) {
1646 if(fork() == 0) {
1647 if(dpy)
1648 close(ConnectionNumber(dpy));
1649 setsid();
1650 execvp(((char **)arg->v)[0], (char **)arg->v);
1651 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1652 perror(" failed");
1653 exit(EXIT_SUCCESS);
1654 }
1655}
1656
1657void
1658tag(const Arg *arg) {
1659 if(selmon->sel && arg->ui & TAGMASK) {
1660 selmon->sel->tags = arg->ui & TAGMASK;
1661 focus(NULL);
1662 arrange(selmon);
1663 }
1664}
1665
1666void
1667tagmon(const Arg *arg) {
1668 if(!selmon->sel || !mons->next)
1669 return;
1670 sendmon(selmon->sel, dirtomon(arg->i));
1671}
1672
1673int
1674textnw(const char *text, unsigned int len) {
1675 XRectangle r;
1676
1677 if(dc.font.set) {
1678 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1679 return r.width;
1680 }
1681 return XTextWidth(dc.font.xfont, text, len);
1682}
1683
1684void
1685tile(Monitor *m) {
1686 unsigned int i, n, h, mw, my, ty;
1687 Client *c;
1688
1689 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1690 if(n == 0)
1691 return;
1692
1693 if(n > m->nmaster)
1694 mw = m->nmaster ? m->ww * m->mfact : 0;
1695 else
1696 mw = m->ww;
1697 for(i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1698 if(i < m->nmaster) {
1699 h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1700 resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), False);
1701 my += HEIGHT(c);
1702 }
1703 else {
1704 h = (m->wh - ty) / (n - i);
1705 resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), False);
1706 ty += HEIGHT(c);
1707 }
1708}
1709
1710void
1711togglebar(const Arg *arg) {
1712 selmon->showbar = !selmon->showbar;
1713 updatebarpos(selmon);
1714 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1715 arrange(selmon);
1716}
1717
1718void
1719togglefloating(const Arg *arg) {
1720 if(!selmon->sel)
1721 return;
1722 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1723 if(selmon->sel->isfloating)
1724 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1725 selmon->sel->w, selmon->sel->h, False);
1726 arrange(selmon);
1727}
1728
1729void
1730toggletag(const Arg *arg) {
1731 unsigned int newtags;
1732
1733 if(!selmon->sel)
1734 return;
1735 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1736 if(newtags) {
1737 selmon->sel->tags = newtags;
1738 focus(NULL);
1739 arrange(selmon);
1740 }
1741}
1742
1743void
1744toggleview(const Arg *arg) {
1745 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1746
1747 if(newtagset) {
1748 selmon->tagset[selmon->seltags] = newtagset;
1749 focus(NULL);
1750 arrange(selmon);
1751 }
1752}
1753
1754void
1755unfocus(Client *c, Bool setfocus) {
1756 if(!c)
1757 return;
1758 grabbuttons(c, False);
1759 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1760 if(setfocus)
1761 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1762}
1763
1764void
1765unmanage(Client *c, Bool destroyed) {
1766 Monitor *m = c->mon;
1767 XWindowChanges wc;
1768
1769 /* The server grab construct avoids race conditions. */
1770 detach(c);
1771 detachstack(c);
1772 if(!destroyed) {
1773 wc.border_width = c->oldbw;
1774 XGrabServer(dpy);
1775 XSetErrorHandler(xerrordummy);
1776 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1777 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1778 setclientstate(c, WithdrawnState);
1779 XSync(dpy, False);
1780 XSetErrorHandler(xerror);
1781 XUngrabServer(dpy);
1782 }
1783 free(c);
1784 focus(NULL);
1785 arrange(m);
1786}
1787
1788void
1789unmapnotify(XEvent *e) {
1790 Client *c;
1791 XUnmapEvent *ev = &e->xunmap;
1792
1793 if((c = wintoclient(ev->window))) {
1794 if(ev->send_event)
1795 setclientstate(c, WithdrawnState);
1796 else
1797 unmanage(c, False);
1798 }
1799}
1800
1801void
1802updatebars(void) {
1803 Monitor *m;
1804 XSetWindowAttributes wa = {
1805 .override_redirect = True,
1806 .background_pixmap = ParentRelative,
1807 .event_mask = ButtonPressMask|ExposureMask
1808 };
1809 for(m = mons; m; m = m->next) {
1810 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1811 CopyFromParent, DefaultVisual(dpy, screen),
1812 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1813 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1814 XMapRaised(dpy, m->barwin);
1815 }
1816}
1817
1818void
1819updatebarpos(Monitor *m) {
1820 m->wy = m->my;
1821 m->wh = m->mh;
1822 if(m->showbar) {
1823 m->wh -= bh;
1824 m->by = m->topbar ? m->wy : m->wy + m->wh;
1825 m->wy = m->topbar ? m->wy + bh : m->wy;
1826 }
1827 else
1828 m->by = -bh;
1829}
1830
1831Bool
1832updategeom(void) {
1833 Bool dirty = False;
1834
1835#ifdef XINERAMA
1836 if(XineramaIsActive(dpy)) {
1837 int i, j, n, nn;
1838 Client *c;
1839 Monitor *m;
1840 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1841 XineramaScreenInfo *unique = NULL;
1842
1843 for(n = 0, m = mons; m; m = m->next, n++);
1844 /* only consider unique geometries as separate screens */
1845 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
1846 die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
1847 for(i = 0, j = 0; i < nn; i++)
1848 if(isuniquegeom(unique, j, &info[i]))
1849 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1850 XFree(info);
1851 nn = j;
1852 if(n <= nn) {
1853 for(i = 0; i < (nn - n); i++) { /* new monitors available */
1854 for(m = mons; m && m->next; m = m->next);
1855 if(m)
1856 m->next = createmon();
1857 else
1858 mons = createmon();
1859 }
1860 for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1861 if(i >= n
1862 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1863 || unique[i].width != m->mw || unique[i].height != m->mh))
1864 {
1865 dirty = True;
1866 m->num = i;
1867 m->mx = m->wx = unique[i].x_org;
1868 m->my = m->wy = unique[i].y_org;
1869 m->mw = m->ww = unique[i].width;
1870 m->mh = m->wh = unique[i].height;
1871 updatebarpos(m);
1872 }
1873 }
1874 else { /* less monitors available nn < n */
1875 for(i = nn; i < n; i++) {
1876 for(m = mons; m && m->next; m = m->next);
1877 while(m->clients) {
1878 dirty = True;
1879 c = m->clients;
1880 m->clients = c->next;
1881 detachstack(c);
1882 c->mon = mons;
1883 attach(c);
1884 attachstack(c);
1885 }
1886 if(m == selmon)
1887 selmon = mons;
1888 cleanupmon(m);
1889 }
1890 }
1891 free(unique);
1892 }
1893 else
1894#endif /* XINERAMA */
1895 /* default monitor setup */
1896 {
1897 if(!mons)
1898 mons = createmon();
1899 if(mons->mw != sw || mons->mh != sh) {
1900 dirty = True;
1901 mons->mw = mons->ww = sw;
1902 mons->mh = mons->wh = sh;
1903 updatebarpos(mons);
1904 }
1905 }
1906 if(dirty) {
1907 selmon = mons;
1908 selmon = wintomon(root);
1909 }
1910 return dirty;
1911}
1912
1913void
1914updatenumlockmask(void) {
1915 unsigned int i, j;
1916 XModifierKeymap *modmap;
1917
1918 numlockmask = 0;
1919 modmap = XGetModifierMapping(dpy);
1920 for(i = 0; i < 8; i++)
1921 for(j = 0; j < modmap->max_keypermod; j++)
1922 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1923 == XKeysymToKeycode(dpy, XK_Num_Lock))
1924 numlockmask = (1 << i);
1925 XFreeModifiermap(modmap);
1926}
1927
1928void
1929updatesizehints(Client *c) {
1930 long msize;
1931 XSizeHints size;
1932
1933 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1934 /* size is uninitialized, ensure that size.flags aren't used */
1935 size.flags = PSize;
1936 if(size.flags & PBaseSize) {
1937 c->basew = size.base_width;
1938 c->baseh = size.base_height;
1939 }
1940 else if(size.flags & PMinSize) {
1941 c->basew = size.min_width;
1942 c->baseh = size.min_height;
1943 }
1944 else
1945 c->basew = c->baseh = 0;
1946 if(size.flags & PResizeInc) {
1947 c->incw = size.width_inc;
1948 c->inch = size.height_inc;
1949 }
1950 else
1951 c->incw = c->inch = 0;
1952 if(size.flags & PMaxSize) {
1953 c->maxw = size.max_width;
1954 c->maxh = size.max_height;
1955 }
1956 else
1957 c->maxw = c->maxh = 0;
1958 if(size.flags & PMinSize) {
1959 c->minw = size.min_width;
1960 c->minh = size.min_height;
1961 }
1962 else if(size.flags & PBaseSize) {
1963 c->minw = size.base_width;
1964 c->minh = size.base_height;
1965 }
1966 else
1967 c->minw = c->minh = 0;
1968 if(size.flags & PAspect) {
1969 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1970 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1971 }
1972 else
1973 c->maxa = c->mina = 0.0;
1974 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1975 && c->maxw == c->minw && c->maxh == c->minh);
1976}
1977
1978void
1979updatetitle(Client *c) {
1980 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1981 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1982 if(c->name[0] == '\0') /* hack to mark broken clients */
1983 strcpy(c->name, broken);
1984}
1985
1986void
1987updatestatus(void) {
1988 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1989 strcpy(stext, "dwm-"VERSION);
1990 drawbar(selmon);
1991}
1992
1993void
1994updatewindowtype(Client *c) {
1995 Atom state = getatomprop(c, netatom[NetWMState]);
1996 Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
1997
1998 if(state == netatom[NetWMFullscreen])
1999 setfullscreen(c, True);
2000
2001 if(wtype == netatom[NetWMWindowTypeDialog])
2002 c->isfloating = True;
2003}
2004
2005void
2006updatewmhints(Client *c) {
2007 XWMHints *wmh;
2008
2009 if((wmh = XGetWMHints(dpy, c->win))) {
2010 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
2011 wmh->flags &= ~XUrgencyHint;
2012 XSetWMHints(dpy, c->win, wmh);
2013 }
2014 else
2015 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
2016 if(wmh->flags & InputHint)
2017 c->neverfocus = !wmh->input;
2018 else
2019 c->neverfocus = False;
2020 XFree(wmh);
2021 }
2022}
2023
2024void
2025view(const Arg *arg) {
2026 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2027 return;
2028 selmon->seltags ^= 1; /* toggle sel tagset */
2029 if(arg->ui & TAGMASK)
2030 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2031 focus(NULL);
2032 arrange(selmon);
2033}
2034
2035Client *
2036wintoclient(Window w) {
2037 Client *c;
2038 Monitor *m;
2039
2040 for(m = mons; m; m = m->next)
2041 for(c = m->clients; c; c = c->next)
2042 if(c->win == w)
2043 return c;
2044 return NULL;
2045}
2046
2047Monitor *
2048wintomon(Window w) {
2049 int x, y;
2050 Client *c;
2051 Monitor *m;
2052
2053 if(w == root && getrootptr(&x, &y))
2054 return ptrtomon(x, y);
2055 for(m = mons; m; m = m->next)
2056 if(w == m->barwin)
2057 return m;
2058 if((c = wintoclient(w)))
2059 return c->mon;
2060 return selmon;
2061}
2062
2063/* There's no way to check accesses to destroyed windows, thus those cases are
2064 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2065 * default error handler, which may call exit. */
2066int
2067xerror(Display *dpy, XErrorEvent *ee) {
2068 if(ee->error_code == BadWindow
2069 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2070 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2071 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2072 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2073 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2074 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2075 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2076 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2077 return 0;
2078 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2079 ee->request_code, ee->error_code);
2080 return xerrorxlib(dpy, ee); /* may call exit */
2081}
2082
2083int
2084xerrordummy(Display *dpy, XErrorEvent *ee) {
2085 return 0;
2086}
2087
2088/* Startup Error handler to check if another window manager
2089 * is already running. */
2090int
2091xerrorstart(Display *dpy, XErrorEvent *ee) {
2092 die("dwm: another window manager is already running\n");
2093 return -1;
2094}
2095
2096void
2097zoom(const Arg *arg) {
2098 Client *c = selmon->sel;
2099
2100 if(!selmon->lt[selmon->sellt]->arrange
2101 || (selmon->sel && selmon->sel->isfloating))
2102 return;
2103 if(c == nexttiled(selmon->clients))
2104 if(!c || !(c = nexttiled(c->next)))
2105 return;
2106 pop(c);
2107}
2108
2109int
2110main(int argc, char *argv[]) {
2111 if(argc == 2 && !strcmp("-v", argv[1]))
2112 die("dwm-"VERSION", © 2006-2011 dwm engineers, see LICENSE for details\n");
2113 else if(argc != 1)
2114 die("usage: dwm [-v]\n");
2115 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2116 fputs("warning: no locale support\n", stderr);
2117 if(!(dpy = XOpenDisplay(NULL)))
2118 die("dwm: cannot open display\n");
2119 checkotherwm();
2120 setup();
2121 scan();
2122 run();
2123 cleanup();
2124 XCloseDisplay(dpy);
2125 return EXIT_SUCCESS;
2126}