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 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains a bit array to indicate the tags of a
20 * client.
21 *
22 * Keys and tagging rules are organized as arrays and defined in config.h.
23 *
24 * To understand everything else, start reading main().
25 */
26#include <errno.h>
27#include <locale.h>
28#include <stdarg.h>
29#include <stdio.h>
30#include <stdlib.h>
31#include <string.h>
32#include <unistd.h>
33#include <sys/select.h>
34#include <sys/types.h>
35#include <sys/wait.h>
36#include <X11/cursorfont.h>
37#include <X11/keysym.h>
38#include <X11/Xatom.h>
39#include <X11/Xlib.h>
40#include <X11/Xproto.h>
41#include <X11/Xutil.h>
42#ifdef XINERAMA
43#include <X11/extensions/Xinerama.h>
44#endif
45
46/* macros */
47#define MAX(a, b) ((a) > (b) ? (a) : (b))
48#define MIN(a, b) ((a) < (b) ? (a) : (b))
49#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
50#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
51#define LENGTH(x) (sizeof x / sizeof x[0])
52#define MAXTAGLEN 16
53#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
54#define TAGMASK ((int)((1LL << 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, NetLast }; /* EWMH atoms */
61enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
62
63/* typedefs */
64typedef unsigned int uint;
65typedef unsigned long ulong;
66typedef struct Client Client;
67struct Client {
68 char name[256];
69 int x, y, w, h;
70 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
71 int minax, maxax, minay, maxay;
72 int bw, oldbw;
73 Bool isbanned, isfixed, isfloating, ismoved, isurgent;
74 uint tags;
75 Client *next;
76 Client *prev;
77 Client *snext;
78 Window win;
79};
80
81typedef struct {
82 int x, y, w, h;
83 ulong norm[ColLast];
84 ulong sel[ColLast];
85 Drawable drawable;
86 GC gc;
87 struct {
88 int ascent;
89 int descent;
90 int height;
91 XFontSet set;
92 XFontStruct *xfont;
93 } font;
94} DC; /* draw context */
95
96typedef struct {
97 uint mod;
98 KeySym keysym;
99 void (*func)(const void *arg);
100 const void *arg;
101} Key;
102
103typedef struct {
104 const char *symbol;
105 void (*arrange)(void);
106} Layout;
107
108typedef struct {
109 const char *class;
110 const char *instance;
111 const char *title;
112 uint tags;
113 Bool isfloating;
114} Rule;
115
116/* function declarations */
117void applyrules(Client *c);
118void arrange(void);
119void attach(Client *c);
120void attachstack(Client *c);
121void buttonpress(XEvent *e);
122void checkotherwm(void);
123void cleanup(void);
124void configure(Client *c);
125void configurenotify(XEvent *e);
126void configurerequest(XEvent *e);
127void destroynotify(XEvent *e);
128void detach(Client *c);
129void detachstack(Client *c);
130void drawbar(void);
131void drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]);
132void drawtext(const char *text, ulong col[ColLast], Bool invert);
133void enternotify(XEvent *e);
134void eprint(const char *errstr, ...);
135void expose(XEvent *e);
136void focus(Client *c);
137void focusin(XEvent *e);
138void focusnext(const void *arg);
139void focusprev(const void *arg);
140Client *getclient(Window w);
141ulong getcolor(const char *colstr);
142long getstate(Window w);
143Bool gettextprop(Window w, Atom atom, char *text, uint size);
144void grabbuttons(Client *c, Bool focused);
145void grabkeys(void);
146void initfont(const char *fontstr);
147Bool isoccupied(uint t);
148Bool isprotodel(Client *c);
149Bool isurgent(uint t);
150void keypress(XEvent *e);
151void killclient(const void *arg);
152void manage(Window w, XWindowAttributes *wa);
153void mappingnotify(XEvent *e);
154void maprequest(XEvent *e);
155void movemouse(Client *c);
156Client *nexttiled(Client *c);
157void propertynotify(XEvent *e);
158void quit(const void *arg);
159void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
160void resizemouse(Client *c);
161void restack(void);
162void run(void);
163void scan(void);
164void setclientstate(Client *c, long state);
165void setmfact(const void *arg);
166void setup(void);
167void spawn(const void *arg);
168void tag(const void *arg);
169uint textnw(const char *text, uint len);
170void tile(void);
171void togglebar(const void *arg);
172void togglefloating(const void *arg);
173void togglelayout(const void *arg);
174void togglemax(const void *arg);
175void toggletag(const void *arg);
176void toggleview(const void *arg);
177void unmanage(Client *c);
178void unmapnotify(XEvent *e);
179void updatebar(void);
180void updategeom(void);
181void updatesizehints(Client *c);
182void updatetitle(Client *c);
183void updatewmhints(Client *c);
184void view(const void *arg);
185int xerror(Display *dpy, XErrorEvent *ee);
186int xerrordummy(Display *dpy, XErrorEvent *ee);
187int xerrorstart(Display *dpy, XErrorEvent *ee);
188void zoom(const void *arg);
189
190/* variables */
191char stext[256];
192int screen, sx, sy, sw, sh;
193int by, bh, blw, wx, wy, ww, wh;
194uint seltags = 0;
195int (*xerrorxlib)(Display *, XErrorEvent *);
196uint numlockmask = 0;
197void (*handler[LASTEvent]) (XEvent *) = {
198 [ButtonPress] = buttonpress,
199 [ConfigureRequest] = configurerequest,
200 [ConfigureNotify] = configurenotify,
201 [DestroyNotify] = destroynotify,
202 [EnterNotify] = enternotify,
203 [Expose] = expose,
204 [FocusIn] = focusin,
205 [KeyPress] = keypress,
206 [MappingNotify] = mappingnotify,
207 [MapRequest] = maprequest,
208 [PropertyNotify] = propertynotify,
209 [UnmapNotify] = unmapnotify
210};
211Atom wmatom[WMLast], netatom[NetLast];
212Bool ismax = False;
213Bool otherwm, readin;
214Bool running = True;
215uint tagset[] = {1, 1}; /* after start, first tag is selected */
216Client *clients = NULL;
217Client *sel = NULL;
218Client *stack = NULL;
219Cursor cursor[CurLast];
220Display *dpy;
221DC dc = {0};
222Layout layouts[];
223Layout *lt = layouts;
224Window root, barwin;
225
226/* configuration, allows nested code to access above variables */
227#include "config.h"
228
229/* compile-time check if all tags fit into an uint bit array. */
230struct NumTags { char limitexceeded[sizeof(uint) * 8 < LENGTH(tags) ? -1 : 1]; };
231
232/* function implementations */
233void
234applyrules(Client *c) {
235 uint i;
236 Rule *r;
237 XClassHint ch = { 0 };
238
239 /* rule matching */
240 XGetClassHint(dpy, c->win, &ch);
241 for(i = 0; i < LENGTH(rules); i++) {
242 r = &rules[i];
243 if((!r->title || strstr(c->name, r->title))
244 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
245 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
246 c->isfloating = r->isfloating;
247 c->tags |= r->tags & TAGMASK;
248 }
249 }
250 if(ch.res_class)
251 XFree(ch.res_class);
252 if(ch.res_name)
253 XFree(ch.res_name);
254 if(!c->tags)
255 c->tags = tagset[seltags];
256}
257
258void
259arrange(void) {
260 Client *c;
261
262 for(c = clients; c; c = c->next)
263 if(c->tags & tagset[seltags]) { /* is visible */
264 if(ismax && !c->isfixed) {
265 XMoveResizeWindow(dpy, c->win, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
266 c->ismoved = True;
267 }
268 else if(!lt->arrange || c->isfloating)
269 resize(c, c->x, c->y, c->w, c->h, True);
270 c->isbanned = False;
271 }
272 else if(!c->isbanned) {
273 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
274 c->isbanned = c->ismoved = True;
275 }
276
277 focus(NULL);
278 if(lt->arrange && !ismax)
279 lt->arrange();
280 restack();
281}
282
283void
284attach(Client *c) {
285 if(clients)
286 clients->prev = c;
287 c->next = clients;
288 clients = c;
289}
290
291void
292attachstack(Client *c) {
293 c->snext = stack;
294 stack = c;
295}
296
297void
298buttonpress(XEvent *e) {
299 uint i, x, mask;
300 Client *c;
301 XButtonPressedEvent *ev = &e->xbutton;
302
303 if(ev->window == barwin) {
304 x = 0;
305 for(i = 0; i < LENGTH(tags); i++) {
306 x += TEXTW(tags[i]);
307 if(ev->x < x) {
308 mask = 1 << i;
309 if(ev->button == Button1) {
310 if(ev->state & MODKEY)
311 tag(&mask);
312 else
313 view(&mask);
314 }
315 else if(ev->button == Button3) {
316 if(ev->state & MODKEY)
317 toggletag(&mask);
318 else
319 toggleview(&mask);
320 }
321 return;
322 }
323 }
324 if(ev->x < x + blw) {
325 if(ev->button == Button1)
326 togglelayout(NULL);
327 else if(ev->button == Button3)
328 togglemax(NULL);
329 }
330 }
331 else if((c = getclient(ev->window))) {
332 focus(c);
333 if(CLEANMASK(ev->state) != MODKEY || (ismax && !c->isfixed))
334 return;
335 if(ev->button == Button1)
336 movemouse(c);
337 else if(ev->button == Button2)
338 togglefloating(NULL);
339 else if(ev->button == Button3 && !c->isfixed)
340 resizemouse(c);
341 }
342}
343
344void
345checkotherwm(void) {
346 otherwm = False;
347 XSetErrorHandler(xerrorstart);
348
349 /* this causes an error if some other window manager is running */
350 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
351 XSync(dpy, False);
352 if(otherwm)
353 eprint("dwm: another window manager is already running\n");
354 XSetErrorHandler(NULL);
355 xerrorxlib = XSetErrorHandler(xerror);
356 XSync(dpy, False);
357}
358
359void
360cleanup(void) {
361 close(STDIN_FILENO);
362 view((uint[]){~0});
363 while(stack)
364 unmanage(stack);
365 if(dc.font.set)
366 XFreeFontSet(dpy, dc.font.set);
367 else
368 XFreeFont(dpy, dc.font.xfont);
369 XUngrabKey(dpy, AnyKey, AnyModifier, root);
370 XFreePixmap(dpy, dc.drawable);
371 XFreeGC(dpy, dc.gc);
372 XFreeCursor(dpy, cursor[CurNormal]);
373 XFreeCursor(dpy, cursor[CurResize]);
374 XFreeCursor(dpy, cursor[CurMove]);
375 XDestroyWindow(dpy, barwin);
376 XSync(dpy, False);
377 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
378}
379
380void
381configure(Client *c) {
382 XConfigureEvent ce;
383
384 ce.type = ConfigureNotify;
385 ce.display = dpy;
386 ce.event = c->win;
387 ce.window = c->win;
388 ce.x = c->x;
389 ce.y = c->y;
390 ce.width = c->w;
391 ce.height = c->h;
392 ce.border_width = c->bw;
393 ce.above = None;
394 ce.override_redirect = False;
395 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
396}
397
398void
399configurenotify(XEvent *e) {
400 XConfigureEvent *ev = &e->xconfigure;
401
402 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
403 sw = ev->width;
404 sh = ev->height;
405 updategeom();
406 updatebar();
407 arrange();
408 }
409}
410
411void
412configurerequest(XEvent *e) {
413 Client *c;
414 XConfigureRequestEvent *ev = &e->xconfigurerequest;
415 XWindowChanges wc;
416
417 if((c = getclient(ev->window))) {
418 if(ev->value_mask & CWBorderWidth)
419 c->bw = ev->border_width;
420 if(ismax && !c->isbanned && !c->isfixed)
421 XMoveResizeWindow(dpy, c->win, wx, wy, ww - 2 * c->bw, wh + 2 * c->bw);
422 else if(c->isfloating || !lt->arrange) {
423 if(ev->value_mask & CWX)
424 c->x = sx + ev->x;
425 if(ev->value_mask & CWY)
426 c->y = sy + ev->y;
427 if(ev->value_mask & CWWidth)
428 c->w = ev->width;
429 if(ev->value_mask & CWHeight)
430 c->h = ev->height;
431 if((c->x - sx + c->w) > sw && c->isfloating)
432 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
433 if((c->y - sy + c->h) > sh && c->isfloating)
434 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
435 if((ev->value_mask & (CWX|CWY))
436 && !(ev->value_mask & (CWWidth|CWHeight)))
437 configure(c);
438 if(!c->isbanned)
439 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
440 }
441 else
442 configure(c);
443 }
444 else {
445 wc.x = ev->x;
446 wc.y = ev->y;
447 wc.width = ev->width;
448 wc.height = ev->height;
449 wc.border_width = ev->border_width;
450 wc.sibling = ev->above;
451 wc.stack_mode = ev->detail;
452 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
453 }
454 XSync(dpy, False);
455}
456
457void
458destroynotify(XEvent *e) {
459 Client *c;
460 XDestroyWindowEvent *ev = &e->xdestroywindow;
461
462 if((c = getclient(ev->window)))
463 unmanage(c);
464}
465
466void
467detach(Client *c) {
468 if(c->prev)
469 c->prev->next = c->next;
470 if(c->next)
471 c->next->prev = c->prev;
472 if(c == clients)
473 clients = c->next;
474 c->next = c->prev = NULL;
475}
476
477void
478detachstack(Client *c) {
479 Client **tc;
480
481 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
482 *tc = c->snext;
483}
484
485void
486drawbar(void) {
487 int i, x;
488 Client *c;
489
490 dc.x = 0;
491 for(c = stack; c && c->isbanned; c = c->snext);
492 for(i = 0; i < LENGTH(tags); i++) {
493 dc.w = TEXTW(tags[i]);
494 if(tagset[seltags] & 1 << i) {
495 drawtext(tags[i], dc.sel, isurgent(i));
496 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.sel);
497 }
498 else {
499 drawtext(tags[i], dc.norm, isurgent(i));
500 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.norm);
501 }
502 dc.x += dc.w;
503 }
504 if(blw > 0) {
505 dc.w = blw;
506 drawtext(lt->symbol, dc.norm, ismax);
507 x = dc.x + dc.w;
508 }
509 else
510 x = dc.x;
511 dc.w = TEXTW(stext);
512 dc.x = ww - dc.w;
513 if(dc.x < x) {
514 dc.x = x;
515 dc.w = ww - x;
516 }
517 drawtext(stext, dc.norm, False);
518 if((dc.w = dc.x - x) > bh) {
519 dc.x = x;
520 if(c) {
521 drawtext(c->name, dc.sel, False);
522 drawsquare(c->isfixed, c->isfloating, False, dc.sel);
523 }
524 else
525 drawtext(NULL, dc.norm, False);
526 }
527 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
528 XSync(dpy, False);
529}
530
531void
532drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]) {
533 int x;
534 XGCValues gcv;
535 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
536
537 gcv.foreground = col[invert ? ColBG : ColFG];
538 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
539 x = (dc.font.ascent + dc.font.descent + 2) / 4;
540 r.x = dc.x + 1;
541 r.y = dc.y + 1;
542 if(filled) {
543 r.width = r.height = x + 1;
544 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
545 }
546 else if(empty) {
547 r.width = r.height = x;
548 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
549 }
550}
551
552void
553drawtext(const char *text, ulong col[ColLast], Bool invert) {
554 int x, y, w, h;
555 uint len, olen;
556 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
557 char buf[256];
558
559 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
560 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
561 if(!text)
562 return;
563 olen = strlen(text);
564 len = MIN(olen, sizeof buf);
565 memcpy(buf, text, len);
566 w = 0;
567 h = dc.font.ascent + dc.font.descent;
568 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
569 x = dc.x + (h / 2);
570 /* shorten text if necessary */
571 for(; len && (w = textnw(buf, len)) > dc.w - h; len--);
572 if(!len)
573 return;
574 if(len < olen) {
575 if(len > 1)
576 buf[len - 1] = '.';
577 if(len > 2)
578 buf[len - 2] = '.';
579 if(len > 3)
580 buf[len - 3] = '.';
581 }
582 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
583 if(dc.font.set)
584 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
585 else
586 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
587}
588
589void
590enternotify(XEvent *e) {
591 Client *c;
592 XCrossingEvent *ev = &e->xcrossing;
593
594 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
595 return;
596 if((c = getclient(ev->window)))
597 focus(c);
598 else
599 focus(NULL);
600}
601
602void
603eprint(const char *errstr, ...) {
604 va_list ap;
605
606 va_start(ap, errstr);
607 vfprintf(stderr, errstr, ap);
608 va_end(ap);
609 exit(EXIT_FAILURE);
610}
611
612void
613expose(XEvent *e) {
614 XExposeEvent *ev = &e->xexpose;
615
616 if(ev->count == 0 && (ev->window == barwin))
617 drawbar();
618}
619
620void
621focus(Client *c) {
622 if(!c || (c && c->isbanned))
623 for(c = stack; c && c->isbanned; c = c->snext);
624 if(sel && sel != c) {
625 grabbuttons(sel, False);
626 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
627 }
628 if(c) {
629 detachstack(c);
630 attachstack(c);
631 grabbuttons(c, True);
632 }
633 sel = c;
634 if(c) {
635 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
636 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
637 }
638 else
639 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
640 drawbar();
641}
642
643void
644focusin(XEvent *e) { /* there are some broken focus acquiring clients */
645 XFocusChangeEvent *ev = &e->xfocus;
646
647 if(sel && ev->window != sel->win)
648 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
649}
650
651void
652focusnext(const void *arg) {
653 Client *c;
654
655 if(!sel)
656 return;
657 for(c = sel->next; c && c->isbanned; c = c->next);
658 if(!c)
659 for(c = clients; c && c->isbanned; c = c->next);
660 if(c) {
661 focus(c);
662 restack();
663 }
664}
665
666void
667focusprev(const void *arg) {
668 Client *c;
669
670 if(!sel)
671 return;
672 for(c = sel->prev; c && c->isbanned; c = c->prev);
673 if(!c) {
674 for(c = clients; c && c->next; c = c->next);
675 for(; c && c->isbanned; c = c->prev);
676 }
677 if(c) {
678 focus(c);
679 restack();
680 }
681}
682
683Client *
684getclient(Window w) {
685 Client *c;
686
687 for(c = clients; c && c->win != w; c = c->next);
688 return c;
689}
690
691ulong
692getcolor(const char *colstr) {
693 Colormap cmap = DefaultColormap(dpy, screen);
694 XColor color;
695
696 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
697 eprint("error, cannot allocate color '%s'\n", colstr);
698 return color.pixel;
699}
700
701long
702getstate(Window w) {
703 int format, status;
704 long result = -1;
705 unsigned char *p = NULL;
706 ulong n, extra;
707 Atom real;
708
709 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
710 &real, &format, &n, &extra, (unsigned char **)&p);
711 if(status != Success)
712 return -1;
713 if(n != 0)
714 result = *p;
715 XFree(p);
716 return result;
717}
718
719Bool
720gettextprop(Window w, Atom atom, char *text, uint size) {
721 char **list = NULL;
722 int n;
723 XTextProperty name;
724
725 if(!text || size == 0)
726 return False;
727 text[0] = '\0';
728 XGetTextProperty(dpy, w, &name, atom);
729 if(!name.nitems)
730 return False;
731 if(name.encoding == XA_STRING)
732 strncpy(text, (char *)name.value, size - 1);
733 else {
734 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
735 && n > 0 && *list) {
736 strncpy(text, *list, size - 1);
737 XFreeStringList(list);
738 }
739 }
740 text[size - 1] = '\0';
741 XFree(name.value);
742 return True;
743}
744
745void
746grabbuttons(Client *c, Bool focused) {
747 int i, j;
748 uint buttons[] = { Button1, Button2, Button3 };
749 uint modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask,
750 MODKEY|numlockmask|LockMask} ;
751
752 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
753 if(focused)
754 for(i = 0; i < LENGTH(buttons); i++)
755 for(j = 0; j < LENGTH(modifiers); j++)
756 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
757 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
758 else
759 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
760 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
761}
762
763void
764grabkeys(void) {
765 uint i, j;
766 KeyCode code;
767 XModifierKeymap *modmap;
768
769 /* init modifier map */
770 modmap = XGetModifierMapping(dpy);
771 for(i = 0; i < 8; i++)
772 for(j = 0; j < modmap->max_keypermod; j++) {
773 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
774 numlockmask = (1 << i);
775 }
776 XFreeModifiermap(modmap);
777
778 XUngrabKey(dpy, AnyKey, AnyModifier, root);
779 for(i = 0; i < LENGTH(keys); i++) {
780 code = XKeysymToKeycode(dpy, keys[i].keysym);
781 XGrabKey(dpy, code, keys[i].mod, root, True,
782 GrabModeAsync, GrabModeAsync);
783 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
784 GrabModeAsync, GrabModeAsync);
785 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
786 GrabModeAsync, GrabModeAsync);
787 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
788 GrabModeAsync, GrabModeAsync);
789 }
790}
791
792void
793initfont(const char *fontstr) {
794 char *def, **missing;
795 int i, n;
796
797 missing = NULL;
798 if(dc.font.set)
799 XFreeFontSet(dpy, dc.font.set);
800 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
801 if(missing) {
802 while(n--)
803 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
804 XFreeStringList(missing);
805 }
806 if(dc.font.set) {
807 XFontSetExtents *font_extents;
808 XFontStruct **xfonts;
809 char **font_names;
810 dc.font.ascent = dc.font.descent = 0;
811 font_extents = XExtentsOfFontSet(dc.font.set);
812 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
813 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
814 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
815 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
816 xfonts++;
817 }
818 }
819 else {
820 if(dc.font.xfont)
821 XFreeFont(dpy, dc.font.xfont);
822 dc.font.xfont = NULL;
823 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
824 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
825 eprint("error, cannot load font: '%s'\n", fontstr);
826 dc.font.ascent = dc.font.xfont->ascent;
827 dc.font.descent = dc.font.xfont->descent;
828 }
829 dc.font.height = dc.font.ascent + dc.font.descent;
830}
831
832Bool
833isoccupied(uint t) {
834 Client *c;
835
836 for(c = clients; c; c = c->next)
837 if(c->tags & 1 << t)
838 return True;
839 return False;
840}
841
842Bool
843isprotodel(Client *c) {
844 int i, n;
845 Atom *protocols;
846 Bool ret = False;
847
848 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
849 for(i = 0; !ret && i < n; i++)
850 if(protocols[i] == wmatom[WMDelete])
851 ret = True;
852 XFree(protocols);
853 }
854 return ret;
855}
856
857Bool
858isurgent(uint t) {
859 Client *c;
860
861 for(c = clients; c; c = c->next)
862 if(c->isurgent && c->tags & 1 << t)
863 return True;
864 return False;
865}
866
867void
868keypress(XEvent *e) {
869 uint i;
870 KeySym keysym;
871 XKeyEvent *ev;
872
873 ev = &e->xkey;
874 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
875 for(i = 0; i < LENGTH(keys); i++)
876 if(keysym == keys[i].keysym
877 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
878 && keys[i].func)
879 keys[i].func(keys[i].arg);
880}
881
882void
883killclient(const void *arg) {
884 XEvent ev;
885
886 if(!sel)
887 return;
888 if(isprotodel(sel)) {
889 ev.type = ClientMessage;
890 ev.xclient.window = sel->win;
891 ev.xclient.message_type = wmatom[WMProtocols];
892 ev.xclient.format = 32;
893 ev.xclient.data.l[0] = wmatom[WMDelete];
894 ev.xclient.data.l[1] = CurrentTime;
895 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
896 }
897 else
898 XKillClient(dpy, sel->win);
899}
900
901void
902manage(Window w, XWindowAttributes *wa) {
903 Client *c, *t = NULL;
904 Status rettrans;
905 Window trans;
906 XWindowChanges wc;
907
908 if(!(c = calloc(1, sizeof(Client))))
909 eprint("fatal: could not calloc() %u bytes\n", sizeof(Client));
910 c->win = w;
911
912 /* geometry */
913 c->x = wa->x;
914 c->y = wa->y;
915 c->w = wa->width;
916 c->h = wa->height;
917 c->oldbw = wa->border_width;
918 if(c->w == sw && c->h == sh) {
919 c->x = sx;
920 c->y = sy;
921 c->bw = wa->border_width;
922 }
923 else {
924 if(c->x + c->w + 2 * c->bw > sx + sw)
925 c->x = sx + sw - c->w - 2 * c->bw;
926 if(c->y + c->h + 2 * c->bw > sy + sh)
927 c->y = sy + sh - c->h - 2 * c->bw;
928 c->x = MAX(c->x, sx);
929 c->y = MAX(c->y, by == 0 ? bh : sy);
930 c->bw = borderpx;
931 }
932
933 wc.border_width = c->bw;
934 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
935 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
936 configure(c); /* propagates border_width, if size doesn't change */
937 updatesizehints(c);
938 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
939 grabbuttons(c, False);
940 updatetitle(c);
941 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
942 for(t = clients; t && t->win != trans; t = t->next);
943 if(t)
944 c->tags = t->tags;
945 else
946 applyrules(c);
947 if(!c->isfloating)
948 c->isfloating = (rettrans == Success) || c->isfixed;
949 if(c->isfloating)
950 XRaiseWindow(dpy, c->win);
951 attach(c);
952 attachstack(c);
953 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
954 XMapWindow(dpy, c->win);
955 setclientstate(c, NormalState);
956 arrange();
957}
958
959void
960mappingnotify(XEvent *e) {
961 XMappingEvent *ev = &e->xmapping;
962
963 XRefreshKeyboardMapping(ev);
964 if(ev->request == MappingKeyboard)
965 grabkeys();
966}
967
968void
969maprequest(XEvent *e) {
970 static XWindowAttributes wa;
971 XMapRequestEvent *ev = &e->xmaprequest;
972
973 if(!XGetWindowAttributes(dpy, ev->window, &wa))
974 return;
975 if(wa.override_redirect)
976 return;
977 if(!getclient(ev->window))
978 manage(ev->window, &wa);
979}
980
981void
982movemouse(Client *c) {
983 int x1, y1, ocx, ocy, di, nx, ny;
984 uint dui;
985 Window dummy;
986 XEvent ev;
987
988 restack();
989 ocx = nx = c->x;
990 ocy = ny = c->y;
991 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
992 None, cursor[CurMove], CurrentTime) != GrabSuccess)
993 return;
994 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
995 for(;;) {
996 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
997 switch (ev.type) {
998 case ButtonRelease:
999 XUngrabPointer(dpy, CurrentTime);
1000 return;
1001 case ConfigureRequest:
1002 case Expose:
1003 case MapRequest:
1004 handler[ev.type](&ev);
1005 break;
1006 case MotionNotify:
1007 XSync(dpy, False);
1008 nx = ocx + (ev.xmotion.x - x1);
1009 ny = ocy + (ev.xmotion.y - y1);
1010 if(snap && nx >= wx && nx <= wx + ww
1011 && ny >= wy && ny <= wy + wh) {
1012 if(abs(wx - nx) < snap)
1013 nx = wx;
1014 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
1015 nx = wx + ww - c->w - 2 * c->bw;
1016 if(abs(wy - ny) < snap)
1017 ny = wy;
1018 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
1019 ny = wy + wh - c->h - 2 * c->bw;
1020 if(!c->isfloating && lt->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1021 togglefloating(NULL);
1022 }
1023 if(!lt->arrange || c->isfloating)
1024 resize(c, nx, ny, c->w, c->h, False);
1025 break;
1026 }
1027 }
1028}
1029
1030Client *
1031nexttiled(Client *c) {
1032 for(; c && (c->isfloating || c->isbanned); c = c->next);
1033 return c;
1034}
1035
1036void
1037propertynotify(XEvent *e) {
1038 Client *c;
1039 Window trans;
1040 XPropertyEvent *ev = &e->xproperty;
1041
1042 if(ev->state == PropertyDelete)
1043 return; /* ignore */
1044 if((c = getclient(ev->window))) {
1045 switch (ev->atom) {
1046 default: break;
1047 case XA_WM_TRANSIENT_FOR:
1048 XGetTransientForHint(dpy, c->win, &trans);
1049 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1050 arrange();
1051 break;
1052 case XA_WM_NORMAL_HINTS:
1053 updatesizehints(c);
1054 break;
1055 case XA_WM_HINTS:
1056 updatewmhints(c);
1057 drawbar();
1058 break;
1059 }
1060 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1061 updatetitle(c);
1062 if(c == sel)
1063 drawbar();
1064 }
1065 }
1066}
1067
1068void
1069quit(const void *arg) {
1070 readin = running = False;
1071}
1072
1073void
1074resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1075 XWindowChanges wc;
1076
1077 if(sizehints) {
1078 /* set minimum possible */
1079 w = MAX(1, w);
1080 h = MAX(1, h);
1081
1082 /* temporarily remove base dimensions */
1083 w -= c->basew;
1084 h -= c->baseh;
1085
1086 /* adjust for aspect limits */
1087 if(c->minax != c->maxax && c->minay != c->maxay
1088 && c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0) {
1089 if(w * c->maxay > h * c->maxax)
1090 w = h * c->maxax / c->maxay;
1091 else if(w * c->minay < h * c->minax)
1092 h = w * c->minay / c->minax;
1093 }
1094
1095 /* adjust for increment value */
1096 if(c->incw)
1097 w -= w % c->incw;
1098 if(c->inch)
1099 h -= h % c->inch;
1100
1101 /* restore base dimensions */
1102 w += c->basew;
1103 h += c->baseh;
1104
1105 w = MAX(w, c->minw);
1106 h = MAX(h, c->minh);
1107
1108 if (c->maxw)
1109 w = MIN(w, c->maxw);
1110
1111 if (c->maxh)
1112 h = MIN(h, c->maxh);
1113 }
1114 if(w <= 0 || h <= 0)
1115 return;
1116 if(x > sx + sw)
1117 x = sw - w - 2 * c->bw;
1118 if(y > sy + sh)
1119 y = sh - h - 2 * c->bw;
1120 if(x + w + 2 * c->bw < sx)
1121 x = sx;
1122 if(y + h + 2 * c->bw < sy)
1123 y = sy;
1124 if(h < bh)
1125 h = bh;
1126 if(w < bh)
1127 w = bh;
1128 if(c->x != x || c->y != y || c->w != w || c->h != h || c->ismoved) {
1129 c->ismoved = False;
1130 c->x = wc.x = x;
1131 c->y = wc.y = y;
1132 c->w = wc.width = w;
1133 c->h = wc.height = h;
1134 wc.border_width = c->bw;
1135 XConfigureWindow(dpy, c->win,
1136 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1137 configure(c);
1138 XSync(dpy, False);
1139 }
1140}
1141
1142void
1143resizemouse(Client *c) {
1144 int ocx, ocy;
1145 int nw, nh;
1146 XEvent ev;
1147
1148 restack();
1149 ocx = c->x;
1150 ocy = c->y;
1151 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1152 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1153 return;
1154 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1155 for(;;) {
1156 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1157 switch(ev.type) {
1158 case ButtonRelease:
1159 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1160 c->w + c->bw - 1, c->h + c->bw - 1);
1161 XUngrabPointer(dpy, CurrentTime);
1162 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1163 return;
1164 case ConfigureRequest:
1165 case Expose:
1166 case MapRequest:
1167 handler[ev.type](&ev);
1168 break;
1169 case MotionNotify:
1170 XSync(dpy, False);
1171 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1172 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1173
1174 if(snap && nw >= wx && nw <= wx + ww
1175 && nh >= wy && nh <= wy + wh) {
1176 if(!c->isfloating && lt->arrange
1177 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1178 togglefloating(NULL);
1179 }
1180 if(!lt->arrange || c->isfloating)
1181 resize(c, c->x, c->y, nw, nh, True);
1182 break;
1183 }
1184 }
1185}
1186
1187void
1188restack(void) {
1189 Client *c;
1190 XEvent ev;
1191 XWindowChanges wc;
1192
1193 drawbar();
1194 if(!sel)
1195 return;
1196 if(ismax || sel->isfloating || !lt->arrange)
1197 XRaiseWindow(dpy, sel->win);
1198 if(!ismax && lt->arrange) {
1199 wc.stack_mode = Below;
1200 wc.sibling = barwin;
1201 for(c = stack; c; c = c->snext)
1202 if(!c->isfloating && !c->isbanned) {
1203 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1204 wc.sibling = c->win;
1205 }
1206 }
1207 XSync(dpy, False);
1208 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1209}
1210
1211void
1212run(void) {
1213 char *p;
1214 char sbuf[sizeof stext];
1215 fd_set rd;
1216 int r, xfd;
1217 uint len, offset;
1218 XEvent ev;
1219
1220 /* main event loop, also reads status text from stdin */
1221 XSync(dpy, False);
1222 xfd = ConnectionNumber(dpy);
1223 readin = True;
1224 offset = 0;
1225 len = sizeof stext - 1;
1226 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1227 while(running) {
1228 FD_ZERO(&rd);
1229 if(readin)
1230 FD_SET(STDIN_FILENO, &rd);
1231 FD_SET(xfd, &rd);
1232 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1233 if(errno == EINTR)
1234 continue;
1235 eprint("select failed\n");
1236 }
1237 if(FD_ISSET(STDIN_FILENO, &rd)) {
1238 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1239 case -1:
1240 strncpy(stext, strerror(errno), len);
1241 readin = False;
1242 break;
1243 case 0:
1244 strncpy(stext, "EOF", 4);
1245 readin = False;
1246 break;
1247 default:
1248 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1249 if(*p == '\n' || *p == '\0') {
1250 *p = '\0';
1251 strncpy(stext, sbuf, len);
1252 p += r - 1; /* p is sbuf + offset + r - 1 */
1253 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1254 offset = r;
1255 if(r)
1256 memmove(sbuf, p - r + 1, r);
1257 break;
1258 }
1259 break;
1260 }
1261 drawbar();
1262 }
1263 while(XPending(dpy)) {
1264 XNextEvent(dpy, &ev);
1265 if(handler[ev.type])
1266 (handler[ev.type])(&ev); /* call handler */
1267 }
1268 }
1269}
1270
1271void
1272scan(void) {
1273 uint i, num;
1274 Window *wins, d1, d2;
1275 XWindowAttributes wa;
1276
1277 wins = NULL;
1278 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1279 for(i = 0; i < num; i++) {
1280 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1281 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1282 continue;
1283 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1284 manage(wins[i], &wa);
1285 }
1286 for(i = 0; i < num; i++) { /* now the transients */
1287 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1288 continue;
1289 if(XGetTransientForHint(dpy, wins[i], &d1)
1290 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1291 manage(wins[i], &wa);
1292 }
1293 }
1294 if(wins)
1295 XFree(wins);
1296}
1297
1298void
1299setclientstate(Client *c, long state) {
1300 long data[] = {state, None};
1301
1302 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1303 PropModeReplace, (unsigned char *)data, 2);
1304}
1305
1306/* arg > 1.0 will set mfact absolutly */
1307void
1308setmfact(const void *arg) {
1309 double d = *((double*) arg);
1310
1311 if(!d || !lt->arrange)
1312 return;
1313 d = d < 1.0 ? d + mfact : d - 1.0;
1314 if(d < 0.1 || d > 0.9)
1315 return;
1316 mfact = d;
1317 arrange();
1318}
1319
1320void
1321setup(void) {
1322 uint i, w;
1323 XSetWindowAttributes wa;
1324
1325 /* init screen */
1326 screen = DefaultScreen(dpy);
1327 root = RootWindow(dpy, screen);
1328 initfont(FONT);
1329 sx = 0;
1330 sy = 0;
1331 sw = DisplayWidth(dpy, screen);
1332 sh = DisplayHeight(dpy, screen);
1333 bh = dc.font.height + 2;
1334 updategeom();
1335
1336 /* init atoms */
1337 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1338 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1339 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1340 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1341 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1342 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1343
1344 /* init cursors */
1345 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1346 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1347 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1348
1349 /* init appearance */
1350 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1351 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1352 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1353 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1354 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1355 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1356 initfont(FONT);
1357 dc.h = bh;
1358 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1359 dc.gc = XCreateGC(dpy, root, 0, 0);
1360 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1361 if(!dc.font.set)
1362 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1363
1364 /* init bar */
1365 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1366 w = TEXTW(layouts[i].symbol);
1367 blw = MAX(blw, w);
1368 }
1369
1370 wa.override_redirect = 1;
1371 wa.background_pixmap = ParentRelative;
1372 wa.event_mask = ButtonPressMask|ExposureMask;
1373
1374 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1375 CopyFromParent, DefaultVisual(dpy, screen),
1376 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1377 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1378 XMapRaised(dpy, barwin);
1379 strcpy(stext, "dwm-"VERSION);
1380 drawbar();
1381
1382 /* EWMH support per view */
1383 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1384 PropModeReplace, (unsigned char *) netatom, NetLast);
1385
1386 /* select for events */
1387 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1388 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1389 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1390 XSelectInput(dpy, root, wa.event_mask);
1391
1392
1393 /* grab keys */
1394 grabkeys();
1395}
1396
1397void
1398spawn(const void *arg) {
1399 static char *shell = NULL;
1400
1401 if(!shell && !(shell = getenv("SHELL")))
1402 shell = "/bin/sh";
1403 /* The double-fork construct avoids zombie processes and keeps the code
1404 * clean from stupid signal handlers. */
1405 if(fork() == 0) {
1406 if(fork() == 0) {
1407 if(dpy)
1408 close(ConnectionNumber(dpy));
1409 setsid();
1410 execl(shell, shell, "-c", (char *)arg, (char *)NULL);
1411 fprintf(stderr, "dwm: execl '%s -c %s'", shell, (char *)arg);
1412 perror(" failed");
1413 }
1414 exit(0);
1415 }
1416 wait(0);
1417}
1418
1419void
1420tag(const void *arg) {
1421 if(sel && *(int *)arg & TAGMASK) {
1422 sel->tags = *(int *)arg & TAGMASK;
1423 arrange();
1424 }
1425}
1426
1427uint
1428textnw(const char *text, uint len) {
1429 XRectangle r;
1430
1431 if(dc.font.set) {
1432 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1433 return r.width;
1434 }
1435 return XTextWidth(dc.font.xfont, text, len);
1436}
1437
1438void
1439tile(void) {
1440 int x, y, h, w, mw;
1441 uint i, n;
1442 Client *c;
1443
1444 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1445 if(n == 0)
1446 return;
1447
1448 /* master */
1449 c = nexttiled(clients);
1450 mw = mfact * ww;
1451 resize(c, wx, wy, ((n == 1) ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1452
1453 if(--n == 0)
1454 return;
1455
1456 /* tile stack */
1457 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : ww - mw;
1458 y = wy;
1459 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1460 h = wh / n;
1461 if(h < bh)
1462 h = wh;
1463
1464 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1465 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1466 ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
1467 if(h != wh)
1468 y = c->y + c->h + 2 * c->bw;
1469 }
1470}
1471
1472void
1473togglebar(const void *arg) {
1474 showbar = !showbar;
1475 updategeom();
1476 updatebar();
1477 arrange();
1478}
1479
1480void
1481togglefloating(const void *arg) {
1482 if(!sel)
1483 return;
1484 sel->isfloating = !sel->isfloating || sel->isfixed;
1485 if(sel->isfloating)
1486 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1487 arrange();
1488}
1489
1490void
1491togglelayout(const void *arg) {
1492 uint i;
1493
1494 if(!arg) {
1495 if(++lt == &layouts[LENGTH(layouts)])
1496 lt = &layouts[0];
1497 }
1498 else {
1499 for(i = 0; i < LENGTH(layouts); i++)
1500 if(!strcmp((char *)arg, layouts[i].symbol))
1501 break;
1502 if(i == LENGTH(layouts))
1503 return;
1504 lt = &layouts[i];
1505 }
1506 if(sel)
1507 arrange();
1508 else
1509 drawbar();
1510}
1511
1512void
1513togglemax(const void *arg) {
1514 ismax = !ismax;
1515 arrange();
1516}
1517
1518void
1519toggletag(const void *arg) {
1520 if(sel && (sel->tags ^ ((*(int *)arg) & TAGMASK))) {
1521 sel->tags ^= (*(int *)arg) & TAGMASK;
1522 arrange();
1523 }
1524}
1525
1526void
1527toggleview(const void *arg) {
1528 if((tagset[seltags] ^ ((*(int *)arg) & TAGMASK))) {
1529 tagset[seltags] ^= (*(int *)arg) & TAGMASK;
1530 arrange();
1531 }
1532}
1533
1534void
1535unmanage(Client *c) {
1536 XWindowChanges wc;
1537
1538 wc.border_width = c->oldbw;
1539 /* The server grab construct avoids race conditions. */
1540 XGrabServer(dpy);
1541 XSetErrorHandler(xerrordummy);
1542 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1543 detach(c);
1544 detachstack(c);
1545 if(sel == c)
1546 focus(NULL);
1547 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1548 setclientstate(c, WithdrawnState);
1549 free(c);
1550 XSync(dpy, False);
1551 XSetErrorHandler(xerror);
1552 XUngrabServer(dpy);
1553 arrange();
1554}
1555
1556void
1557unmapnotify(XEvent *e) {
1558 Client *c;
1559 XUnmapEvent *ev = &e->xunmap;
1560
1561 if((c = getclient(ev->window)))
1562 unmanage(c);
1563}
1564
1565void
1566updatebar(void) {
1567 if(dc.drawable != 0)
1568 XFreePixmap(dpy, dc.drawable);
1569 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1570 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1571}
1572
1573void
1574updategeom(void) {
1575 int i;
1576#ifdef XINERAMA
1577 XineramaScreenInfo *info = NULL;
1578
1579 /* window area geometry */
1580 if(XineramaIsActive(dpy)) {
1581 info = XineramaQueryScreens(dpy, &i);
1582 wx = info[0].x_org;
1583 wy = showbar && topbar ? info[0].y_org + bh : info[0].y_org;
1584 ww = info[0].width;
1585 wh = showbar ? info[0].height - bh : info[0].height;
1586 XFree(info);
1587 }
1588 else
1589#endif
1590 {
1591 wx = sx;
1592 wy = showbar && topbar ? sy + bh : sy;
1593 ww = sw;
1594 wh = showbar ? sh - bh : sh;
1595 }
1596
1597 /* bar position */
1598 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1599}
1600
1601void
1602updatesizehints(Client *c) {
1603 long msize;
1604 XSizeHints size;
1605
1606 XGetWMNormalHints(dpy, c->win, &size, &msize);
1607 if(size.flags & PBaseSize) {
1608 c->basew = size.base_width;
1609 c->baseh = size.base_height;
1610 }
1611 else if(size.flags & PMinSize) {
1612 c->basew = size.min_width;
1613 c->baseh = size.min_height;
1614 }
1615 else
1616 c->basew = c->baseh = 0;
1617 if(size.flags & PResizeInc) {
1618 c->incw = size.width_inc;
1619 c->inch = size.height_inc;
1620 }
1621 else
1622 c->incw = c->inch = 0;
1623 if(size.flags & PMaxSize) {
1624 c->maxw = size.max_width;
1625 c->maxh = size.max_height;
1626 }
1627 else
1628 c->maxw = c->maxh = 0;
1629 if(size.flags & PMinSize) {
1630 c->minw = size.min_width;
1631 c->minh = size.min_height;
1632 }
1633 else if(size.flags & PBaseSize) {
1634 c->minw = size.base_width;
1635 c->minh = size.base_height;
1636 }
1637 else
1638 c->minw = c->minh = 0;
1639 if(size.flags & PAspect) {
1640 c->minax = size.min_aspect.x;
1641 c->maxax = size.max_aspect.x;
1642 c->minay = size.min_aspect.y;
1643 c->maxay = size.max_aspect.y;
1644 }
1645 else
1646 c->minax = c->maxax = c->minay = c->maxay = 0;
1647 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1648 && c->maxw == c->minw && c->maxh == c->minh);
1649}
1650
1651void
1652updatetitle(Client *c) {
1653 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1654 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1655}
1656
1657void
1658updatewmhints(Client *c) {
1659 XWMHints *wmh;
1660
1661 if((wmh = XGetWMHints(dpy, c->win))) {
1662 if(c == sel)
1663 sel->isurgent = False;
1664 else
1665 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1666 XFree(wmh);
1667 }
1668}
1669
1670void
1671view(const void *arg) {
1672 seltags ^= 1; /* toggle sel tagset */
1673 if(arg && (*(int *)arg & TAGMASK))
1674 tagset[seltags] = *(int *)arg & TAGMASK;
1675 arrange();
1676}
1677
1678/* There's no way to check accesses to destroyed windows, thus those cases are
1679 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1680 * default error handler, which may call exit. */
1681int
1682xerror(Display *dpy, XErrorEvent *ee) {
1683 if(ee->error_code == BadWindow
1684 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1685 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1686 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1687 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1688 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1689 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1690 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1691 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1692 return 0;
1693 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1694 ee->request_code, ee->error_code);
1695 return xerrorxlib(dpy, ee); /* may call exit */
1696}
1697
1698int
1699xerrordummy(Display *dpy, XErrorEvent *ee) {
1700 return 0;
1701}
1702
1703/* Startup Error handler to check if another window manager
1704 * is already running. */
1705int
1706xerrorstart(Display *dpy, XErrorEvent *ee) {
1707 otherwm = True;
1708 return -1;
1709}
1710
1711void
1712zoom(const void *arg) {
1713 Client *c = sel;
1714
1715 if(ismax || !lt->arrange || (sel && sel->isfloating))
1716 return;
1717 if(c == nexttiled(clients))
1718 if(!c || !(c = nexttiled(c->next)))
1719 return;
1720 detach(c);
1721 attach(c);
1722 focus(c);
1723 arrange();
1724}
1725
1726int
1727main(int argc, char *argv[]) {
1728 if(argc == 2 && !strcmp("-v", argv[1]))
1729 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1730 else if(argc != 1)
1731 eprint("usage: dwm [-v]\n");
1732
1733 setlocale(LC_CTYPE, "");
1734 if(!(dpy = XOpenDisplay(0)))
1735 eprint("dwm: cannot open display\n");
1736
1737 checkotherwm();
1738 setup();
1739 scan();
1740 run();
1741 cleanup();
1742
1743 XCloseDisplay(dpy);
1744 return 0;
1745}