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 */
62enum { ClkLtSymbol = 64, ClkStatusText, ClkWinTitle,
63 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
64
65/* typedefs */
66typedef unsigned int uint;
67typedef unsigned long ulong;
68
69typedef union {
70 int i;
71 uint ui;
72 float f;
73 void *v;
74} Arg;
75
76typedef struct {
77 uint click;
78 uint mask;
79 uint button;
80 void (*func)(const Arg *arg);
81 const Arg arg;
82} Button;
83
84typedef struct Client Client;
85struct Client {
86 char name[256];
87 float mina, maxa;
88 int x, y, w, h;
89 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
90 int bw, oldbw;
91 uint tags;
92 Bool isbanned, isfixed, isfloating, isurgent;
93 Client *next;
94 Client *snext;
95 Window win;
96};
97
98typedef struct {
99 int x, y, w, h;
100 ulong norm[ColLast];
101 ulong sel[ColLast];
102 Drawable drawable;
103 GC gc;
104 struct {
105 int ascent;
106 int descent;
107 int height;
108 XFontSet set;
109 XFontStruct *xfont;
110 } font;
111} DC; /* draw context */
112
113typedef struct {
114 uint mod;
115 KeySym keysym;
116 void (*func)(const Arg *);
117 const Arg arg;
118} Key;
119
120typedef struct {
121 const char *symbol;
122 void (*arrange)(void);
123} Layout;
124
125typedef struct {
126 const char *class;
127 const char *instance;
128 const char *title;
129 uint tags;
130 Bool isfloating;
131} Rule;
132
133/* function declarations */
134static void applyrules(Client *c);
135static void arrange(void);
136static void attach(Client *c);
137static void attachstack(Client *c);
138static void buttonpress(XEvent *e);
139static void checkotherwm(void);
140static void cleanup(void);
141static void configure(Client *c);
142static void configurenotify(XEvent *e);
143static void configurerequest(XEvent *e);
144static void destroynotify(XEvent *e);
145static void detach(Client *c);
146static void detachstack(Client *c);
147static void drawbar(void);
148static void drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]);
149static void drawtext(const char *text, ulong col[ColLast], Bool invert);
150static void enternotify(XEvent *e);
151static void eprint(const char *errstr, ...);
152static void expose(XEvent *e);
153static void focus(Client *c);
154static void focusin(XEvent *e);
155static void focusstack(const Arg *arg);
156static Client *getclient(Window w);
157static ulong getcolor(const char *colstr);
158static long getstate(Window w);
159static Bool gettextprop(Window w, Atom atom, char *text, uint size);
160static void grabbuttons(Client *c, Bool focused);
161static void grabkeys(void);
162static void initfont(const char *fontstr);
163static Bool isoccupied(uint t);
164static Bool isprotodel(Client *c);
165static Bool isurgent(uint t);
166static void keypress(XEvent *e);
167static void killclient(const Arg *arg);
168static void manage(Window w, XWindowAttributes *wa);
169static void mappingnotify(XEvent *e);
170static void maprequest(XEvent *e);
171static void monocle(void);
172static void movemouse(const Arg *arg);
173static Client *nexttiled(Client *c);
174static void propertynotify(XEvent *e);
175static void quit(const Arg *arg);
176static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
177static void resizemouse(const Arg *arg);
178static void restack(void);
179static void run(void);
180static void scan(void);
181static void setclientstate(Client *c, long state);
182static void setlayout(const Arg *arg);
183static void setmfact(const Arg *arg);
184static void setup(void);
185static void spawn(const Arg *arg);
186static void tag(const Arg *arg);
187static int textnw(const char *text, uint len);
188static void tile(void);
189static void togglebar(const Arg *arg);
190static void togglefloating(const Arg *arg);
191static void toggletag(const Arg *arg);
192static void toggleview(const Arg *arg);
193static void unmanage(Client *c);
194static void unmapnotify(XEvent *e);
195static void updatebar(void);
196static void updategeom(void);
197static void updatesizehints(Client *c);
198static void updatetitle(Client *c);
199static void updatewmhints(Client *c);
200static void view(const Arg *arg);
201static int xerror(Display *dpy, XErrorEvent *ee);
202static int xerrordummy(Display *dpy, XErrorEvent *ee);
203static int xerrorstart(Display *dpy, XErrorEvent *ee);
204static void zoom(const Arg *arg);
205
206/* variables */
207static char stext[256];
208static int screen, sx, sy, sw, sh;
209static int by, bh, blw, wx, wy, ww, wh;
210static uint seltags = 0, sellt = 0;
211static int (*xerrorxlib)(Display *, XErrorEvent *);
212static uint numlockmask = 0;
213static void (*handler[LASTEvent]) (XEvent *) = {
214 [ButtonPress] = buttonpress,
215 [ConfigureRequest] = configurerequest,
216 [ConfigureNotify] = configurenotify,
217 [DestroyNotify] = destroynotify,
218 [EnterNotify] = enternotify,
219 [Expose] = expose,
220 [FocusIn] = focusin,
221 [KeyPress] = keypress,
222 [MappingNotify] = mappingnotify,
223 [MapRequest] = maprequest,
224 [PropertyNotify] = propertynotify,
225 [UnmapNotify] = unmapnotify
226};
227static Atom wmatom[WMLast], netatom[NetLast];
228static Bool otherwm, readin;
229static Bool running = True;
230static uint tagset[] = {1, 1}; /* after start, first tag is selected */
231static Client *clients = NULL;
232static Client *sel = NULL;
233static Client *stack = NULL;
234static Cursor cursor[CurLast];
235static Display *dpy;
236static DC dc = {0};
237static Layout *lt[] = { NULL, NULL };
238static Window root, barwin;
239/* configuration, allows nested code to access above variables */
240#include "config.h"
241
242/* compile-time check if all tags fit into an uint bit array. */
243struct NumTags { char limitexceeded[sizeof(uint) * 8 < LENGTH(tags) ? -1 : 1]; };
244
245/* function implementations */
246void
247applyrules(Client *c) {
248 uint i;
249 Rule *r;
250 XClassHint ch = { 0 };
251
252 /* rule matching */
253 XGetClassHint(dpy, c->win, &ch);
254 for(i = 0; i < LENGTH(rules); i++) {
255 r = &rules[i];
256 if((!r->title || strstr(c->name, r->title))
257 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
258 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
259 c->isfloating = r->isfloating;
260 c->tags |= r->tags & TAGMASK;
261 }
262 }
263 if(ch.res_class)
264 XFree(ch.res_class);
265 if(ch.res_name)
266 XFree(ch.res_name);
267 if(!c->tags)
268 c->tags = tagset[seltags];
269}
270
271void
272arrange(void) {
273 Client *c;
274
275 for(c = clients; c; c = c->next)
276 if(c->tags & tagset[seltags]) { /* is visible */
277 if(!lt[sellt]->arrange || c->isfloating)
278 resize(c, c->x, c->y, c->w, c->h, True);
279 c->isbanned = False;
280 }
281 else if(!c->isbanned) {
282 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
283 c->isbanned = True;
284 }
285
286 focus(NULL);
287 if(lt[sellt]->arrange)
288 lt[sellt]->arrange();
289 restack();
290}
291
292void
293attach(Client *c) {
294 c->next = clients;
295 clients = c;
296}
297
298void
299attachstack(Client *c) {
300 c->snext = stack;
301 stack = c;
302}
303
304void
305buttonpress(XEvent *e) {
306 uint i, x, click;
307 Client *c;
308 XButtonPressedEvent *ev = &e->xbutton;
309
310 click = ClkRootWin;
311 if(ev->window == barwin) {
312 i = x = 0;
313 do
314 x += TEXTW(tags[i]);
315 while(ev->x >= x && ++i < LENGTH(tags));
316 if(i < LENGTH(tags))
317 click = i;
318 else if(ev->x < x + blw)
319 click = ClkLtSymbol;
320 else if(ev->x > wx + ww - TEXTW(stext))
321 click = ClkStatusText;
322 else
323 click = ClkWinTitle;
324 }
325 else if((c = getclient(ev->window))) {
326 focus(c);
327 click = ClkClientWin;
328 }
329
330 for(i = 0; i < LENGTH(buttons); i++)
331 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
332 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
333 buttons[i].func(&buttons[i].arg);
334}
335
336void
337checkotherwm(void) {
338 otherwm = False;
339 XSetErrorHandler(xerrorstart);
340
341 /* this causes an error if some other window manager is running */
342 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
343 XSync(dpy, False);
344 if(otherwm)
345 eprint("dwm: another window manager is already running\n");
346 XSetErrorHandler(NULL);
347 xerrorxlib = XSetErrorHandler(xerror);
348 XSync(dpy, False);
349}
350
351void
352cleanup(void) {
353 Arg a = {.i = ~0};
354 Layout foo = { "", NULL };
355
356 close(STDIN_FILENO);
357 view(&a);
358 lt[sellt] = &foo;
359 while(stack)
360 unmanage(stack);
361 if(dc.font.set)
362 XFreeFontSet(dpy, dc.font.set);
363 else
364 XFreeFont(dpy, dc.font.xfont);
365 XUngrabKey(dpy, AnyKey, AnyModifier, root);
366 XFreePixmap(dpy, dc.drawable);
367 XFreeGC(dpy, dc.gc);
368 XFreeCursor(dpy, cursor[CurNormal]);
369 XFreeCursor(dpy, cursor[CurResize]);
370 XFreeCursor(dpy, cursor[CurMove]);
371 XDestroyWindow(dpy, barwin);
372 XSync(dpy, False);
373 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
374}
375
376void
377configure(Client *c) {
378 XConfigureEvent ce;
379
380 ce.type = ConfigureNotify;
381 ce.display = dpy;
382 ce.event = c->win;
383 ce.window = c->win;
384 ce.x = c->x;
385 ce.y = c->y;
386 ce.width = c->w;
387 ce.height = c->h;
388 ce.border_width = c->bw;
389 ce.above = None;
390 ce.override_redirect = False;
391 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
392}
393
394void
395configurenotify(XEvent *e) {
396 XConfigureEvent *ev = &e->xconfigure;
397
398 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
399 sw = ev->width;
400 sh = ev->height;
401 updategeom();
402 updatebar();
403 arrange();
404 }
405}
406
407void
408configurerequest(XEvent *e) {
409 Client *c;
410 XConfigureRequestEvent *ev = &e->xconfigurerequest;
411 XWindowChanges wc;
412
413 if((c = getclient(ev->window))) {
414 if(ev->value_mask & CWBorderWidth)
415 c->bw = ev->border_width;
416 else if(c->isfloating || !lt[sellt]->arrange) {
417 if(ev->value_mask & CWX)
418 c->x = sx + ev->x;
419 if(ev->value_mask & CWY)
420 c->y = sy + ev->y;
421 if(ev->value_mask & CWWidth)
422 c->w = ev->width;
423 if(ev->value_mask & CWHeight)
424 c->h = ev->height;
425 if((c->x - sx + c->w) > sw && c->isfloating)
426 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
427 if((c->y - sy + c->h) > sh && c->isfloating)
428 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
429 if((ev->value_mask & (CWX|CWY))
430 && !(ev->value_mask & (CWWidth|CWHeight)))
431 configure(c);
432 if(!c->isbanned)
433 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
434 }
435 else
436 configure(c);
437 }
438 else {
439 wc.x = ev->x;
440 wc.y = ev->y;
441 wc.width = ev->width;
442 wc.height = ev->height;
443 wc.border_width = ev->border_width;
444 wc.sibling = ev->above;
445 wc.stack_mode = ev->detail;
446 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
447 }
448 XSync(dpy, False);
449}
450
451void
452destroynotify(XEvent *e) {
453 Client *c;
454 XDestroyWindowEvent *ev = &e->xdestroywindow;
455
456 if((c = getclient(ev->window)))
457 unmanage(c);
458}
459
460void
461detach(Client *c) {
462 Client *i;
463
464 if (c != clients) {
465 for(i = clients; i->next != c; i = i->next);
466 i->next = c->next;
467 }
468 else {
469 clients = c->next;
470 }
471 c->next = NULL;
472}
473
474void
475detachstack(Client *c) {
476 Client **tc;
477
478 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
479 *tc = c->snext;
480}
481
482void
483drawbar(void) {
484 int i, x;
485 Client *c;
486
487 dc.x = 0;
488 for(c = stack; c && c->isbanned; c = c->snext);
489 for(i = 0; i < LENGTH(tags); i++) {
490 dc.w = TEXTW(tags[i]);
491 if(tagset[seltags] & 1 << i) {
492 drawtext(tags[i], dc.sel, isurgent(i));
493 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.sel);
494 }
495 else {
496 drawtext(tags[i], dc.norm, isurgent(i));
497 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.norm);
498 }
499 dc.x += dc.w;
500 }
501 if(blw > 0) {
502 dc.w = blw;
503 drawtext(lt[sellt]->symbol, dc.norm, False);
504 x = dc.x + dc.w;
505 }
506 else
507 x = dc.x;
508 dc.w = TEXTW(stext);
509 dc.x = ww - dc.w;
510 if(dc.x < x) {
511 dc.x = x;
512 dc.w = ww - x;
513 }
514 drawtext(stext, dc.norm, False);
515 if((dc.w = dc.x - x) > bh) {
516 dc.x = x;
517 if(c) {
518 drawtext(c->name, dc.sel, False);
519 drawsquare(c->isfixed, c->isfloating, False, dc.sel);
520 }
521 else
522 drawtext(NULL, dc.norm, False);
523 }
524 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
525 XSync(dpy, False);
526}
527
528void
529drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]) {
530 int x;
531 XGCValues gcv;
532 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
533
534 gcv.foreground = col[invert ? ColBG : ColFG];
535 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
536 x = (dc.font.ascent + dc.font.descent + 2) / 4;
537 r.x = dc.x + 1;
538 r.y = dc.y + 1;
539 if(filled) {
540 r.width = r.height = x + 1;
541 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
542 }
543 else if(empty) {
544 r.width = r.height = x;
545 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
546 }
547}
548
549void
550drawtext(const char *text, ulong col[ColLast], Bool invert) {
551 int i, x, y, h, len, olen;
552 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
553 char buf[256];
554
555 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
556 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
557 if(!text)
558 return;
559 olen = strlen(text);
560 len = MIN(olen, sizeof buf);
561 memcpy(buf, text, len);
562 h = dc.font.ascent + dc.font.descent;
563 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
564 x = dc.x + (h / 2);
565 /* shorten text if necessary */
566 for(; len && (i = textnw(buf, len)) > dc.w - h; len--);
567 if(!len)
568 return;
569 if(len < olen)
570 for(i = len; i && i > len - 3; buf[--i] = '.');
571 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
572 if(dc.font.set)
573 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
574 else
575 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
576}
577
578void
579enternotify(XEvent *e) {
580 Client *c;
581 XCrossingEvent *ev = &e->xcrossing;
582
583 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
584 return;
585 if((c = getclient(ev->window)))
586 focus(c);
587 else
588 focus(NULL);
589}
590
591void
592eprint(const char *errstr, ...) {
593 va_list ap;
594
595 va_start(ap, errstr);
596 vfprintf(stderr, errstr, ap);
597 va_end(ap);
598 exit(EXIT_FAILURE);
599}
600
601void
602expose(XEvent *e) {
603 XExposeEvent *ev = &e->xexpose;
604
605 if(ev->count == 0 && (ev->window == barwin))
606 drawbar();
607}
608
609void
610focus(Client *c) {
611 if(!c || c->isbanned)
612 for(c = stack; c && c->isbanned; c = c->snext);
613 if(sel && sel != c) {
614 grabbuttons(sel, False);
615 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
616 }
617 if(c) {
618 detachstack(c);
619 attachstack(c);
620 grabbuttons(c, True);
621 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
622 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
623 }
624 else
625 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
626 sel = c;
627 drawbar();
628}
629
630void
631focusin(XEvent *e) { /* there are some broken focus acquiring clients */
632 XFocusChangeEvent *ev = &e->xfocus;
633
634 if(sel && ev->window != sel->win)
635 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
636}
637
638void
639focusstack(const Arg *arg) {
640 Client *c = NULL, *i;
641
642 if(!sel)
643 return;
644 if (arg->i > 0) {
645 for(c = sel->next; c && c->isbanned; c = c->next);
646 if(!c)
647 for(c = clients; c && c->isbanned; c = c->next);
648 }
649 else {
650 for(i = clients; i != sel; i = i->next)
651 if (!i->isbanned)
652 c = i;
653 if(!c)
654 for(; i; i = i->next)
655 if (!i->isbanned)
656 c = i;
657 }
658 if(c) {
659 focus(c);
660 restack();
661 }
662}
663
664Client *
665getclient(Window w) {
666 Client *c;
667
668 for(c = clients; c && c->win != w; c = c->next);
669 return c;
670}
671
672ulong
673getcolor(const char *colstr) {
674 Colormap cmap = DefaultColormap(dpy, screen);
675 XColor color;
676
677 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
678 eprint("error, cannot allocate color '%s'\n", colstr);
679 return color.pixel;
680}
681
682long
683getstate(Window w) {
684 int format, status;
685 long result = -1;
686 unsigned char *p = NULL;
687 ulong n, extra;
688 Atom real;
689
690 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
691 &real, &format, &n, &extra, (unsigned char **)&p);
692 if(status != Success)
693 return -1;
694 if(n != 0)
695 result = *p;
696 XFree(p);
697 return result;
698}
699
700Bool
701gettextprop(Window w, Atom atom, char *text, uint size) {
702 char **list = NULL;
703 int n;
704 XTextProperty name;
705
706 if(!text || size == 0)
707 return False;
708 text[0] = '\0';
709 XGetTextProperty(dpy, w, &name, atom);
710 if(!name.nitems)
711 return False;
712 if(name.encoding == XA_STRING)
713 strncpy(text, (char *)name.value, size - 1);
714 else {
715 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
716 && n > 0 && *list) {
717 strncpy(text, *list, size - 1);
718 XFreeStringList(list);
719 }
720 }
721 text[size - 1] = '\0';
722 XFree(name.value);
723 return True;
724}
725
726void
727grabbuttons(Client *c, Bool focused) {
728 int i, j;
729 uint buttons[] = { Button1, Button2, Button3 };
730 uint modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask, MODKEY|numlockmask|LockMask };
731
732 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
733 if(focused)
734 for(i = 0; i < LENGTH(buttons); i++)
735 for(j = 0; j < LENGTH(modifiers); j++)
736 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
737 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
738 else
739 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
740 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
741}
742
743void
744grabkeys(void) {
745 uint i, j;
746 KeyCode code;
747 XModifierKeymap *modmap;
748
749 /* init modifier map */
750 modmap = XGetModifierMapping(dpy);
751 for(i = 0; i < 8; i++)
752 for(j = 0; j < modmap->max_keypermod; j++) {
753 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
754 numlockmask = (1 << i);
755 }
756 XFreeModifiermap(modmap);
757
758 XUngrabKey(dpy, AnyKey, AnyModifier, root);
759 for(i = 0; i < LENGTH(keys); i++) {
760 code = XKeysymToKeycode(dpy, keys[i].keysym);
761 XGrabKey(dpy, code, keys[i].mod, root, True,
762 GrabModeAsync, GrabModeAsync);
763 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
764 GrabModeAsync, GrabModeAsync);
765 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
766 GrabModeAsync, GrabModeAsync);
767 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
768 GrabModeAsync, GrabModeAsync);
769 }
770}
771
772void
773initfont(const char *fontstr) {
774 char *def, **missing;
775 int i, n;
776
777 missing = NULL;
778 if(dc.font.set)
779 XFreeFontSet(dpy, dc.font.set);
780 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
781 if(missing) {
782 while(n--)
783 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
784 XFreeStringList(missing);
785 }
786 if(dc.font.set) {
787 XFontSetExtents *font_extents;
788 XFontStruct **xfonts;
789 char **font_names;
790 dc.font.ascent = dc.font.descent = 0;
791 font_extents = XExtentsOfFontSet(dc.font.set);
792 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
793 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
794 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
795 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
796 xfonts++;
797 }
798 }
799 else {
800 if(dc.font.xfont)
801 XFreeFont(dpy, dc.font.xfont);
802 dc.font.xfont = NULL;
803 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
804 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
805 eprint("error, cannot load font: '%s'\n", fontstr);
806 dc.font.ascent = dc.font.xfont->ascent;
807 dc.font.descent = dc.font.xfont->descent;
808 }
809 dc.font.height = dc.font.ascent + dc.font.descent;
810}
811
812Bool
813isoccupied(uint t) {
814 Client *c;
815
816 for(c = clients; c; c = c->next)
817 if(c->tags & 1 << t)
818 return True;
819 return False;
820}
821
822Bool
823isprotodel(Client *c) {
824 int i, n;
825 Atom *protocols;
826 Bool ret = False;
827
828 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
829 for(i = 0; !ret && i < n; i++)
830 if(protocols[i] == wmatom[WMDelete])
831 ret = True;
832 XFree(protocols);
833 }
834 return ret;
835}
836
837Bool
838isurgent(uint t) {
839 Client *c;
840
841 for(c = clients; c; c = c->next)
842 if(c->isurgent && c->tags & 1 << t)
843 return True;
844 return False;
845}
846
847void
848keypress(XEvent *e) {
849 uint i;
850 KeySym keysym;
851 XKeyEvent *ev;
852
853 ev = &e->xkey;
854 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
855 for(i = 0; i < LENGTH(keys); i++)
856 if(keysym == keys[i].keysym
857 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
858 && keys[i].func)
859 keys[i].func(&(keys[i].arg));
860}
861
862void
863killclient(const Arg *arg) {
864 XEvent ev;
865
866 if(!sel)
867 return;
868 if(isprotodel(sel)) {
869 ev.type = ClientMessage;
870 ev.xclient.window = sel->win;
871 ev.xclient.message_type = wmatom[WMProtocols];
872 ev.xclient.format = 32;
873 ev.xclient.data.l[0] = wmatom[WMDelete];
874 ev.xclient.data.l[1] = CurrentTime;
875 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
876 }
877 else
878 XKillClient(dpy, sel->win);
879}
880
881void
882manage(Window w, XWindowAttributes *wa) {
883 Client *c, *t = NULL;
884 Status rettrans;
885 Window trans;
886 XWindowChanges wc;
887
888 if(!(c = calloc(1, sizeof(Client))))
889 eprint("fatal: could not calloc() %u bytes\n", sizeof(Client));
890 c->win = w;
891
892 /* geometry */
893 c->x = wa->x;
894 c->y = wa->y;
895 c->w = wa->width;
896 c->h = wa->height;
897 c->oldbw = wa->border_width;
898 if(c->w == sw && c->h == sh) {
899 c->x = sx;
900 c->y = sy;
901 c->bw = wa->border_width;
902 }
903 else {
904 if(c->x + c->w + 2 * c->bw > sx + sw)
905 c->x = sx + sw - c->w - 2 * c->bw;
906 if(c->y + c->h + 2 * c->bw > sy + sh)
907 c->y = sy + sh - c->h - 2 * c->bw;
908 c->x = MAX(c->x, sx);
909 /* only fix client y-offset, if the client center might cover the bar */
910 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
911 c->bw = borderpx;
912 }
913
914 wc.border_width = c->bw;
915 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
916 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
917 configure(c); /* propagates border_width, if size doesn't change */
918 updatesizehints(c);
919 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
920 grabbuttons(c, False);
921 updatetitle(c);
922 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
923 for(t = clients; t && t->win != trans; t = t->next);
924 if(t)
925 c->tags = t->tags;
926 else
927 applyrules(c);
928 if(!c->isfloating)
929 c->isfloating = (rettrans == Success) || c->isfixed;
930 if(c->isfloating)
931 XRaiseWindow(dpy, c->win);
932 attach(c);
933 attachstack(c);
934 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
935 XMapWindow(dpy, c->win);
936 setclientstate(c, NormalState);
937 arrange();
938}
939
940void
941mappingnotify(XEvent *e) {
942 XMappingEvent *ev = &e->xmapping;
943
944 XRefreshKeyboardMapping(ev);
945 if(ev->request == MappingKeyboard)
946 grabkeys();
947}
948
949void
950maprequest(XEvent *e) {
951 static XWindowAttributes wa;
952 XMapRequestEvent *ev = &e->xmaprequest;
953
954 if(!XGetWindowAttributes(dpy, ev->window, &wa))
955 return;
956 if(wa.override_redirect)
957 return;
958 if(!getclient(ev->window))
959 manage(ev->window, &wa);
960}
961
962void
963monocle(void) {
964 Client *c;
965
966 for(c = nexttiled(clients); c; c = nexttiled(c->next))
967 resize(c, wx, wy, ww, wh, resizehints);
968}
969
970void
971movemouse(const Arg *arg) {
972 int x1, y1, ocx, ocy, di, nx, ny;
973 uint dui;
974 Client *c;
975 Window dummy;
976 XEvent ev;
977
978 if(!(c = sel))
979 return;
980 restack();
981 ocx = nx = c->x;
982 ocy = ny = c->y;
983 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
984 None, cursor[CurMove], CurrentTime) != GrabSuccess)
985 return;
986 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
987 for(;;) {
988 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
989 switch (ev.type) {
990 case ButtonRelease:
991 XUngrabPointer(dpy, CurrentTime);
992 return;
993 case ConfigureRequest:
994 case Expose:
995 case MapRequest:
996 handler[ev.type](&ev);
997 break;
998 case MotionNotify:
999 XSync(dpy, False);
1000 nx = ocx + (ev.xmotion.x - x1);
1001 ny = ocy + (ev.xmotion.y - y1);
1002 if(snap && nx >= wx && nx <= wx + ww
1003 && ny >= wy && ny <= wy + wh) {
1004 if(abs(wx - nx) < snap)
1005 nx = wx;
1006 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
1007 nx = wx + ww - c->w - 2 * c->bw;
1008 if(abs(wy - ny) < snap)
1009 ny = wy;
1010 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
1011 ny = wy + wh - c->h - 2 * c->bw;
1012 if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1013 togglefloating(NULL);
1014 }
1015 if(!lt[sellt]->arrange || c->isfloating)
1016 resize(c, nx, ny, c->w, c->h, False);
1017 break;
1018 }
1019 }
1020}
1021
1022Client *
1023nexttiled(Client *c) {
1024 for(; c && (c->isfloating || c->isbanned); c = c->next);
1025 return c;
1026}
1027
1028void
1029propertynotify(XEvent *e) {
1030 Client *c;
1031 Window trans;
1032 XPropertyEvent *ev = &e->xproperty;
1033
1034 if(ev->state == PropertyDelete)
1035 return; /* ignore */
1036 if((c = getclient(ev->window))) {
1037 switch (ev->atom) {
1038 default: break;
1039 case XA_WM_TRANSIENT_FOR:
1040 XGetTransientForHint(dpy, c->win, &trans);
1041 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1042 arrange();
1043 break;
1044 case XA_WM_NORMAL_HINTS:
1045 updatesizehints(c);
1046 break;
1047 case XA_WM_HINTS:
1048 updatewmhints(c);
1049 drawbar();
1050 break;
1051 }
1052 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1053 updatetitle(c);
1054 if(c == sel)
1055 drawbar();
1056 }
1057 }
1058}
1059
1060void
1061quit(const Arg *arg) {
1062 readin = running = False;
1063}
1064
1065void
1066resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1067 XWindowChanges wc;
1068
1069 if(sizehints) {
1070 /* set minimum possible */
1071 w = MAX(1, w);
1072 h = MAX(1, h);
1073
1074 /* temporarily remove base dimensions */
1075 w -= c->basew;
1076 h -= c->baseh;
1077
1078 /* adjust for aspect limits */
1079 if(c->mina > 0 && c->maxa > 0) {
1080 if(c->maxa < (float) w/h)
1081 w = h * c->maxa;
1082 else if(c->mina > (float) h/w)
1083 h = w * c->mina;
1084 }
1085
1086 /* adjust for increment value */
1087 if(c->incw)
1088 w -= w % c->incw;
1089 if(c->inch)
1090 h -= h % c->inch;
1091
1092 /* restore base dimensions */
1093 w += c->basew;
1094 h += c->baseh;
1095
1096 w = MAX(w, c->minw);
1097 h = MAX(h, c->minh);
1098
1099 if(c->maxw)
1100 w = MIN(w, c->maxw);
1101
1102 if(c->maxh)
1103 h = MIN(h, c->maxh);
1104 }
1105 if(w <= 0 || h <= 0)
1106 return;
1107 if(x > sx + sw)
1108 x = sw - w - 2 * c->bw;
1109 if(y > sy + sh)
1110 y = sh - h - 2 * c->bw;
1111 if(x + w + 2 * c->bw < sx)
1112 x = sx;
1113 if(y + h + 2 * c->bw < sy)
1114 y = sy;
1115 if(h < bh)
1116 h = bh;
1117 if(w < bh)
1118 w = bh;
1119 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1120 c->x = wc.x = x;
1121 c->y = wc.y = y;
1122 c->w = wc.width = w;
1123 c->h = wc.height = h;
1124 wc.border_width = c->bw;
1125 XConfigureWindow(dpy, c->win,
1126 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1127 configure(c);
1128 XSync(dpy, False);
1129 }
1130}
1131
1132void
1133resizemouse(const Arg *arg) {
1134 int ocx, ocy;
1135 int nw, nh;
1136 Client *c;
1137 XEvent ev;
1138
1139 if(!(c = sel))
1140 return;
1141 restack();
1142 ocx = c->x;
1143 ocy = c->y;
1144 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1145 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1146 return;
1147 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1148 for(;;) {
1149 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1150 switch(ev.type) {
1151 case ButtonRelease:
1152 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1153 c->w + c->bw - 1, c->h + c->bw - 1);
1154 XUngrabPointer(dpy, CurrentTime);
1155 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1156 return;
1157 case ConfigureRequest:
1158 case Expose:
1159 case MapRequest:
1160 handler[ev.type](&ev);
1161 break;
1162 case MotionNotify:
1163 XSync(dpy, False);
1164 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1165 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1166
1167 if(snap && nw >= wx && nw <= wx + ww
1168 && nh >= wy && nh <= wy + wh) {
1169 if(!c->isfloating && lt[sellt]->arrange
1170 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1171 togglefloating(NULL);
1172 }
1173 if(!lt[sellt]->arrange || c->isfloating)
1174 resize(c, c->x, c->y, nw, nh, True);
1175 break;
1176 }
1177 }
1178}
1179
1180void
1181restack(void) {
1182 Client *c;
1183 XEvent ev;
1184 XWindowChanges wc;
1185
1186 drawbar();
1187 if(!sel)
1188 return;
1189 if(sel->isfloating || !lt[sellt]->arrange)
1190 XRaiseWindow(dpy, sel->win);
1191 if(lt[sellt]->arrange) {
1192 wc.stack_mode = Below;
1193 wc.sibling = barwin;
1194 for(c = stack; c; c = c->snext)
1195 if(!c->isfloating && !c->isbanned) {
1196 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1197 wc.sibling = c->win;
1198 }
1199 }
1200 XSync(dpy, False);
1201 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1202}
1203
1204void
1205run(void) {
1206 char *p;
1207 char sbuf[sizeof stext];
1208 fd_set rd;
1209 int r, xfd;
1210 uint len, offset;
1211 XEvent ev;
1212
1213 /* main event loop, also reads status text from stdin */
1214 XSync(dpy, False);
1215 xfd = ConnectionNumber(dpy);
1216 readin = True;
1217 offset = 0;
1218 len = sizeof stext - 1;
1219 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1220 while(running) {
1221 FD_ZERO(&rd);
1222 if(readin)
1223 FD_SET(STDIN_FILENO, &rd);
1224 FD_SET(xfd, &rd);
1225 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1226 if(errno == EINTR)
1227 continue;
1228 eprint("select failed\n");
1229 }
1230 if(FD_ISSET(STDIN_FILENO, &rd)) {
1231 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1232 case -1:
1233 strncpy(stext, strerror(errno), len);
1234 readin = False;
1235 break;
1236 case 0:
1237 strncpy(stext, "EOF", 4);
1238 readin = False;
1239 break;
1240 default:
1241 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1242 if(*p == '\n' || *p == '\0') {
1243 *p = '\0';
1244 strncpy(stext, sbuf, len);
1245 p += r - 1; /* p is sbuf + offset + r - 1 */
1246 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1247 offset = r;
1248 if(r)
1249 memmove(sbuf, p - r + 1, r);
1250 break;
1251 }
1252 break;
1253 }
1254 drawbar();
1255 }
1256 while(XPending(dpy)) {
1257 XNextEvent(dpy, &ev);
1258 if(handler[ev.type])
1259 (handler[ev.type])(&ev); /* call handler */
1260 }
1261 }
1262}
1263
1264void
1265scan(void) {
1266 uint i, num;
1267 Window *wins, d1, d2;
1268 XWindowAttributes wa;
1269
1270 wins = NULL;
1271 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1272 for(i = 0; i < num; i++) {
1273 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1274 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1275 continue;
1276 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1277 manage(wins[i], &wa);
1278 }
1279 for(i = 0; i < num; i++) { /* now the transients */
1280 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1281 continue;
1282 if(XGetTransientForHint(dpy, wins[i], &d1)
1283 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1284 manage(wins[i], &wa);
1285 }
1286 }
1287 if(wins)
1288 XFree(wins);
1289}
1290
1291void
1292setclientstate(Client *c, long state) {
1293 long data[] = {state, None};
1294
1295 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1296 PropModeReplace, (unsigned char *)data, 2);
1297}
1298
1299void
1300setlayout(const Arg *arg) {
1301 sellt ^= 1;
1302 if(arg && arg->v && arg->v != lt[sellt])
1303 lt[sellt] = (Layout *)arg->v;
1304 if(sel)
1305 arrange();
1306 else
1307 drawbar();
1308}
1309
1310/* arg > 1.0 will set mfact absolutly */
1311void
1312setmfact(const Arg *arg) {
1313 float f;
1314
1315 if(!arg || !lt[sellt]->arrange)
1316 return;
1317 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1318 if(f < 0.1 || f > 0.9)
1319 return;
1320 mfact = f;
1321 arrange();
1322}
1323
1324void
1325setup(void) {
1326 uint i;
1327 int w;
1328 XSetWindowAttributes wa;
1329
1330 /* init screen */
1331 screen = DefaultScreen(dpy);
1332 root = RootWindow(dpy, screen);
1333 initfont(font);
1334 sx = 0;
1335 sy = 0;
1336 sw = DisplayWidth(dpy, screen);
1337 sh = DisplayHeight(dpy, screen);
1338 bh = dc.h = dc.font.height + 2;
1339 lt[0] = &layouts[0];
1340 lt[1] = &layouts[1 % LENGTH(layouts)];
1341 updategeom();
1342
1343 /* init atoms */
1344 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1345 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1346 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1347 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1348 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1349 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1350
1351 /* init cursors */
1352 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1353 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1354 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1355
1356 /* init appearance */
1357 dc.norm[ColBorder] = getcolor(normbordercolor);
1358 dc.norm[ColBG] = getcolor(normbgcolor);
1359 dc.norm[ColFG] = getcolor(normfgcolor);
1360 dc.sel[ColBorder] = getcolor(selbordercolor);
1361 dc.sel[ColBG] = getcolor(selbgcolor);
1362 dc.sel[ColFG] = getcolor(selfgcolor);
1363 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1364 dc.gc = XCreateGC(dpy, root, 0, 0);
1365 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1366 if(!dc.font.set)
1367 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1368
1369 /* init bar */
1370 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1371 w = TEXTW(layouts[i].symbol);
1372 blw = MAX(blw, w);
1373 }
1374
1375 wa.override_redirect = 1;
1376 wa.background_pixmap = ParentRelative;
1377 wa.event_mask = ButtonPressMask|ExposureMask;
1378
1379 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1380 CopyFromParent, DefaultVisual(dpy, screen),
1381 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1382 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1383 XMapRaised(dpy, barwin);
1384 strcpy(stext, "dwm-"VERSION);
1385 drawbar();
1386
1387 /* EWMH support per view */
1388 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1389 PropModeReplace, (unsigned char *) netatom, NetLast);
1390
1391 /* select for events */
1392 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1393 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1394 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1395 XSelectInput(dpy, root, wa.event_mask);
1396
1397
1398 /* grab keys */
1399 grabkeys();
1400}
1401
1402void
1403spawn(const Arg *arg) {
1404 /* The double-fork construct avoids zombie processes and keeps the code
1405 * clean from stupid signal handlers. */
1406 if(fork() == 0) {
1407 if(fork() == 0) {
1408 if(dpy)
1409 close(ConnectionNumber(dpy));
1410 setsid();
1411 execvp(((char **)arg->v)[0], (char **)arg->v);
1412 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1413 perror(" failed");
1414 }
1415 exit(0);
1416 }
1417 wait(0);
1418}
1419
1420void
1421tag(const Arg *arg) {
1422 if(sel && arg->ui & TAGMASK) {
1423 sel->tags = arg->ui & TAGMASK;
1424 arrange();
1425 }
1426}
1427
1428int
1429textnw(const char *text, uint len) {
1430 XRectangle r;
1431
1432 if(dc.font.set) {
1433 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1434 return r.width;
1435 }
1436 return XTextWidth(dc.font.xfont, text, len);
1437}
1438
1439void
1440tile(void) {
1441 int x, y, h, w, mw;
1442 uint i, n;
1443 Client *c;
1444
1445 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1446 if(n == 0)
1447 return;
1448
1449 /* master */
1450 c = nexttiled(clients);
1451 mw = mfact * ww;
1452 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1453
1454 if(--n == 0)
1455 return;
1456
1457 /* tile stack */
1458 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1459 y = wy;
1460 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1461 h = wh / n;
1462 if(h < bh)
1463 h = wh;
1464
1465 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1466 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1467 ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
1468 if(h != wh)
1469 y = c->y + c->h + 2 * c->bw;
1470 }
1471}
1472
1473void
1474togglebar(const Arg *arg) {
1475 showbar = !showbar;
1476 updategeom();
1477 updatebar();
1478 arrange();
1479}
1480
1481void
1482togglefloating(const Arg *arg) {
1483 if(!sel)
1484 return;
1485 sel->isfloating = !sel->isfloating || sel->isfixed;
1486 if(sel->isfloating)
1487 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1488 arrange();
1489}
1490
1491void
1492toggletag(const Arg *arg) {
1493 uint mask = sel->tags ^ (arg->ui & TAGMASK);
1494
1495 if(sel && mask) {
1496 sel->tags = mask;
1497 arrange();
1498 }
1499}
1500
1501void
1502toggleview(const Arg *arg) {
1503 uint mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1504
1505 if(mask) {
1506 tagset[seltags] = mask;
1507 arrange();
1508 }
1509}
1510
1511void
1512unmanage(Client *c) {
1513 XWindowChanges wc;
1514
1515 wc.border_width = c->oldbw;
1516 /* The server grab construct avoids race conditions. */
1517 XGrabServer(dpy);
1518 XSetErrorHandler(xerrordummy);
1519 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1520 detach(c);
1521 detachstack(c);
1522 if(sel == c)
1523 focus(NULL);
1524 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1525 setclientstate(c, WithdrawnState);
1526 free(c);
1527 XSync(dpy, False);
1528 XSetErrorHandler(xerror);
1529 XUngrabServer(dpy);
1530 arrange();
1531}
1532
1533void
1534unmapnotify(XEvent *e) {
1535 Client *c;
1536 XUnmapEvent *ev = &e->xunmap;
1537
1538 if((c = getclient(ev->window)))
1539 unmanage(c);
1540}
1541
1542void
1543updatebar(void) {
1544 if(dc.drawable != 0)
1545 XFreePixmap(dpy, dc.drawable);
1546 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1547 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1548}
1549
1550void
1551updategeom(void) {
1552#ifdef XINERAMA
1553 int i;
1554 XineramaScreenInfo *info = NULL;
1555
1556 /* window area geometry */
1557 if(XineramaIsActive(dpy)) {
1558 info = XineramaQueryScreens(dpy, &i);
1559 wx = info[xidx].x_org;
1560 wy = showbar && topbar ? info[xidx].y_org + bh : info[xidx].y_org;
1561 ww = info[xidx].width;
1562 wh = showbar ? info[xidx].height - bh : info[xidx].height;
1563 XFree(info);
1564 }
1565 else
1566#endif
1567 {
1568 wx = sx;
1569 wy = showbar && topbar ? sy + bh : sy;
1570 ww = sw;
1571 wh = showbar ? sh - bh : sh;
1572 }
1573
1574 /* bar position */
1575 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1576}
1577
1578void
1579updatesizehints(Client *c) {
1580 long msize;
1581 XSizeHints size;
1582
1583 XGetWMNormalHints(dpy, c->win, &size, &msize);
1584 if(size.flags & PBaseSize) {
1585 c->basew = size.base_width;
1586 c->baseh = size.base_height;
1587 }
1588 else if(size.flags & PMinSize) {
1589 c->basew = size.min_width;
1590 c->baseh = size.min_height;
1591 }
1592 else
1593 c->basew = c->baseh = 0;
1594 if(size.flags & PResizeInc) {
1595 c->incw = size.width_inc;
1596 c->inch = size.height_inc;
1597 }
1598 else
1599 c->incw = c->inch = 0;
1600 if(size.flags & PMaxSize) {
1601 c->maxw = size.max_width;
1602 c->maxh = size.max_height;
1603 }
1604 else
1605 c->maxw = c->maxh = 0;
1606 if(size.flags & PMinSize) {
1607 c->minw = size.min_width;
1608 c->minh = size.min_height;
1609 }
1610 else if(size.flags & PBaseSize) {
1611 c->minw = size.base_width;
1612 c->minh = size.base_height;
1613 }
1614 else
1615 c->minw = c->minh = 0;
1616 if(size.flags & PAspect) {
1617 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1618 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1619 }
1620 else
1621 c->maxa = c->mina = 0.0;
1622 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1623 && c->maxw == c->minw && c->maxh == c->minh);
1624}
1625
1626void
1627updatetitle(Client *c) {
1628 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1629 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1630}
1631
1632void
1633updatewmhints(Client *c) {
1634 XWMHints *wmh;
1635
1636 if((wmh = XGetWMHints(dpy, c->win))) {
1637 if(c == sel)
1638 sel->isurgent = False;
1639 else
1640 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1641 XFree(wmh);
1642 }
1643}
1644
1645void
1646view(const Arg *arg) {
1647 seltags ^= 1; /* toggle sel tagset */
1648 if(arg && (arg->ui & TAGMASK))
1649 tagset[seltags] = arg->i & TAGMASK;
1650 arrange();
1651}
1652
1653/* There's no way to check accesses to destroyed windows, thus those cases are
1654 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1655 * default error handler, which may call exit. */
1656int
1657xerror(Display *dpy, XErrorEvent *ee) {
1658 if(ee->error_code == BadWindow
1659 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1660 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1661 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1662 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1663 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1664 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1665 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1666 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1667 return 0;
1668 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1669 ee->request_code, ee->error_code);
1670 return xerrorxlib(dpy, ee); /* may call exit */
1671}
1672
1673int
1674xerrordummy(Display *dpy, XErrorEvent *ee) {
1675 return 0;
1676}
1677
1678/* Startup Error handler to check if another window manager
1679 * is already running. */
1680int
1681xerrorstart(Display *dpy, XErrorEvent *ee) {
1682 otherwm = True;
1683 return -1;
1684}
1685
1686void
1687zoom(const Arg *arg) {
1688 Client *c = sel;
1689
1690 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1691 return;
1692 if(c == nexttiled(clients))
1693 if(!c || !(c = nexttiled(c->next)))
1694 return;
1695 detach(c);
1696 attach(c);
1697 focus(c);
1698 arrange();
1699}
1700
1701int
1702main(int argc, char *argv[]) {
1703 if(argc == 2 && !strcmp("-v", argv[1]))
1704 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1705 else if(argc != 1)
1706 eprint("usage: dwm [-v]\n");
1707
1708 setlocale(LC_CTYPE, "");
1709 if(!(dpy = XOpenDisplay(0)))
1710 eprint("dwm: cannot open display\n");
1711
1712 checkotherwm();
1713 setup();
1714 scan();
1715 run();
1716 cleanup();
1717
1718 XCloseDisplay(dpy);
1719 return 0;
1720}