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 BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
48#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
49#define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
50#define ISVISIBLE(x) (x->tags & tagset[seltags])
51#define LENGTH(x) (sizeof x / sizeof x[0])
52#define MAX(a, b) ((a) > (b) ? (a) : (b))
53#define MIN(a, b) ((a) < (b) ? (a) : (b))
54#define MAXTAGLEN 16
55#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
56#define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
57#define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height)
58
59/* enums */
60enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
61enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
62enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
63enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
64enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
65 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
66
67typedef union {
68 int i;
69 unsigned int ui;
70 float f;
71 void *v;
72} Arg;
73
74typedef struct {
75 unsigned int click;
76 unsigned int mask;
77 unsigned int button;
78 void (*func)(const Arg *arg);
79 const Arg arg;
80} Button;
81
82typedef struct Client Client;
83struct Client {
84 char name[256];
85 float mina, maxa;
86 int x, y, w, h;
87 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
88 int bw, oldbw;
89 unsigned int tags;
90 Bool isfixed, isfloating, isurgent;
91 Client *next;
92 Client *snext;
93 Window win;
94};
95
96typedef struct {
97 int x, y, w, h;
98 unsigned long norm[ColLast];
99 unsigned long sel[ColLast];
100 Drawable drawable;
101 GC gc;
102 struct {
103 int ascent;
104 int descent;
105 int height;
106 XFontSet set;
107 XFontStruct *xfont;
108 } font;
109} DC; /* draw context */
110
111typedef struct {
112 unsigned int mod;
113 KeySym keysym;
114 void (*func)(const Arg *);
115 const Arg arg;
116} Key;
117
118typedef struct {
119 const char *symbol;
120 void (*arrange)(void);
121} Layout;
122
123typedef struct {
124 const char *class;
125 const char *instance;
126 const char *title;
127 unsigned int tags;
128 Bool isfloating;
129} Rule;
130
131/* function declarations */
132static void applyrules(Client *c);
133static void arrange(void);
134static void attach(Client *c);
135static void attachstack(Client *c);
136static void buttonpress(XEvent *e);
137static void checkotherwm(void);
138static void cleanup(void);
139static void clearurgent(void);
140static void configure(Client *c);
141static void configurenotify(XEvent *e);
142static void configurerequest(XEvent *e);
143static void destroynotify(XEvent *e);
144static void detach(Client *c);
145static void detachstack(Client *c);
146static void die(const char *errstr, ...);
147static void drawbar(void);
148static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
149static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
150static void enternotify(XEvent *e);
151static void expose(XEvent *e);
152static void focus(Client *c);
153static void focusin(XEvent *e);
154static void focusstack(const Arg *arg);
155static Client *getclient(Window w);
156static unsigned long getcolor(const char *colstr);
157static long getstate(Window w);
158static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
159static void grabbuttons(Client *c, Bool focused);
160static void grabkeys(void);
161static void initfont(const char *fontstr);
162static Bool isprotodel(Client *c);
163static void keypress(XEvent *e);
164static void killclient(const Arg *arg);
165static void manage(Window w, XWindowAttributes *wa);
166static void mappingnotify(XEvent *e);
167static void maprequest(XEvent *e);
168static void monocle(void);
169static void movemouse(const Arg *arg);
170static Client *nexttiled(Client *c);
171static void propertynotify(XEvent *e);
172static void quit(const Arg *arg);
173static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
174static void resizemouse(const Arg *arg);
175static void restack(void);
176static void run(void);
177static void scan(void);
178static void setclientstate(Client *c, long state);
179static void setlayout(const Arg *arg);
180static void setmfact(const Arg *arg);
181static void setup(void);
182static void spawn(const Arg *arg);
183static void tag(const Arg *arg);
184static int textnw(const char *text, unsigned int len);
185static void tile(void);
186static void togglebar(const Arg *arg);
187static void togglefloating(const Arg *arg);
188static void toggletag(const Arg *arg);
189static void toggleview(const Arg *arg);
190static void unmanage(Client *c);
191static void unmapnotify(XEvent *e);
192static void updatebar(void);
193static void updategeom(void);
194static void updatesizehints(Client *c);
195static void updatetitle(Client *c);
196static void updatewmhints(Client *c);
197static void view(const Arg *arg);
198static int xerror(Display *dpy, XErrorEvent *ee);
199static int xerrordummy(Display *dpy, XErrorEvent *ee);
200static int xerrorstart(Display *dpy, XErrorEvent *ee);
201static void zoom(const Arg *arg);
202
203/* variables */
204static char stext[256];
205static int screen;
206static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
207static int by, bh, blw; /* bar geometry y, height and layout symbol width */
208static int wx, wy, ww, wh; /* window area geometry x, y, width, height, bar excluded */
209static unsigned int seltags = 0, sellt = 0;
210static int (*xerrorxlib)(Display *, XErrorEvent *);
211static unsigned int numlockmask = 0;
212static void (*handler[LASTEvent]) (XEvent *) = {
213 [ButtonPress] = buttonpress,
214 [ConfigureRequest] = configurerequest,
215 [ConfigureNotify] = configurenotify,
216 [DestroyNotify] = destroynotify,
217 [EnterNotify] = enternotify,
218 [Expose] = expose,
219 [FocusIn] = focusin,
220 [KeyPress] = keypress,
221 [MappingNotify] = mappingnotify,
222 [MapRequest] = maprequest,
223 [PropertyNotify] = propertynotify,
224 [UnmapNotify] = unmapnotify
225};
226static Atom wmatom[WMLast], netatom[NetLast];
227static Bool otherwm;
228static Bool running = True;
229static unsigned int tagset[] = {1, 1}; /* after start, first tag is selected */
230static Client *clients = NULL;
231static Client *sel = NULL;
232static Client *stack = NULL;
233static Cursor cursor[CurLast];
234static Display *dpy;
235static DC dc = {0};
236static Layout *lt[] = { NULL, NULL };
237static Window root, barwin;
238/* configuration, allows nested code to access above variables */
239#include "config.h"
240
241/* compile-time check if all tags fit into an unsigned int bit array. */
242struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
243
244/* function implementations */
245void
246applyrules(Client *c) {
247 unsigned int i;
248 Rule *r;
249 XClassHint ch = { 0 };
250
251 /* rule matching */
252 XGetClassHint(dpy, c->win, &ch);
253 for(i = 0; i < LENGTH(rules); i++) {
254 r = &rules[i];
255 if((!r->title || strstr(c->name, r->title))
256 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
257 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
258 c->isfloating = r->isfloating;
259 c->tags |= r->tags & TAGMASK;
260 }
261 }
262 if(ch.res_class)
263 XFree(ch.res_class);
264 if(ch.res_name)
265 XFree(ch.res_name);
266 if(!c->tags)
267 c->tags = tagset[seltags];
268}
269
270void
271arrange(void) {
272 Client *c;
273
274 for(c = clients; c; c = c->next)
275 if(ISVISIBLE(c)) {
276 XMoveWindow(dpy, c->win, c->x, c->y);
277 if(!lt[sellt]->arrange || c->isfloating)
278 resize(c, c->x, c->y, c->w, c->h, True);
279 }
280 else {
281 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
282 }
283
284 focus(NULL);
285 if(lt[sellt]->arrange)
286 lt[sellt]->arrange();
287 restack();
288}
289
290void
291attach(Client *c) {
292 c->next = clients;
293 clients = c;
294}
295
296void
297attachstack(Client *c) {
298 c->snext = stack;
299 stack = c;
300}
301
302void
303buttonpress(XEvent *e) {
304 unsigned int i, x, click;
305 Arg arg = {0};
306 Client *c;
307 XButtonPressedEvent *ev = &e->xbutton;
308
309 click = ClkRootWin;
310 if(ev->window == barwin) {
311 i = x = 0;
312 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
313 if(i < LENGTH(tags)) {
314 click = ClkTagBar;
315 arg.ui = 1 << i;
316 }
317 else if(ev->x < x + blw)
318 click = ClkLtSymbol;
319 else if(ev->x > wx + ww - TEXTW(stext))
320 click = ClkStatusText;
321 else
322 click = ClkWinTitle;
323 }
324 else if((c = getclient(ev->window))) {
325 focus(c);
326 click = ClkClientWin;
327 }
328
329 for(i = 0; i < LENGTH(buttons); i++)
330 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
331 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
332 buttons[i].func(click == ClkTagBar ? &arg : &buttons[i].arg);
333}
334
335void
336checkotherwm(void) {
337 otherwm = False;
338 XSetErrorHandler(xerrorstart);
339
340 /* this causes an error if some other window manager is running */
341 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
342 XSync(dpy, False);
343 if(otherwm)
344 die("dwm: another window manager is already running\n");
345 XSetErrorHandler(NULL);
346 xerrorxlib = XSetErrorHandler(xerror);
347 XSync(dpy, False);
348}
349
350void
351cleanup(void) {
352 Arg a = {.ui = ~0};
353 Layout foo = { "", NULL };
354
355 close(STDIN_FILENO);
356 view(&a);
357 lt[sellt] = &foo;
358 while(stack)
359 unmanage(stack);
360 if(dc.font.set)
361 XFreeFontSet(dpy, dc.font.set);
362 else
363 XFreeFont(dpy, dc.font.xfont);
364 XUngrabKey(dpy, AnyKey, AnyModifier, root);
365 XFreePixmap(dpy, dc.drawable);
366 XFreeGC(dpy, dc.gc);
367 XFreeCursor(dpy, cursor[CurNormal]);
368 XFreeCursor(dpy, cursor[CurResize]);
369 XFreeCursor(dpy, cursor[CurMove]);
370 XDestroyWindow(dpy, barwin);
371 XSync(dpy, False);
372 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
373}
374
375void
376clearurgent(void) {
377 XWMHints *wmh;
378 Client *c;
379
380 for(c = clients; c; c = c->next)
381 if(ISVISIBLE(c) && c->isurgent) {
382 c->isurgent = False;
383 if (!(wmh = XGetWMHints(dpy, c->win)))
384 continue;
385
386 wmh->flags &= ~XUrgencyHint;
387 XSetWMHints(dpy, c->win, wmh);
388 XFree(wmh);
389 }
390}
391
392void
393configure(Client *c) {
394 XConfigureEvent ce;
395
396 ce.type = ConfigureNotify;
397 ce.display = dpy;
398 ce.event = c->win;
399 ce.window = c->win;
400 ce.x = c->x;
401 ce.y = c->y;
402 ce.width = c->w;
403 ce.height = c->h;
404 ce.border_width = c->bw;
405 ce.above = None;
406 ce.override_redirect = False;
407 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
408}
409
410void
411configurenotify(XEvent *e) {
412 XConfigureEvent *ev = &e->xconfigure;
413
414 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
415 sw = ev->width;
416 sh = ev->height;
417 updategeom();
418 updatebar();
419 arrange();
420 }
421}
422
423void
424configurerequest(XEvent *e) {
425 Client *c;
426 XConfigureRequestEvent *ev = &e->xconfigurerequest;
427 XWindowChanges wc;
428
429 if((c = getclient(ev->window))) {
430 if(ev->value_mask & CWBorderWidth)
431 c->bw = ev->border_width;
432 else if(c->isfloating || !lt[sellt]->arrange) {
433 if(ev->value_mask & CWX)
434 c->x = sx + ev->x;
435 if(ev->value_mask & CWY)
436 c->y = sy + ev->y;
437 if(ev->value_mask & CWWidth)
438 c->w = ev->width;
439 if(ev->value_mask & CWHeight)
440 c->h = ev->height;
441 if((c->x - sx + c->w) > sw && c->isfloating)
442 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
443 if((c->y - sy + c->h) > sh && c->isfloating)
444 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
445 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
446 configure(c);
447 if(ISVISIBLE(c))
448 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
449 }
450 else
451 configure(c);
452 }
453 else {
454 wc.x = ev->x;
455 wc.y = ev->y;
456 wc.width = ev->width;
457 wc.height = ev->height;
458 wc.border_width = ev->border_width;
459 wc.sibling = ev->above;
460 wc.stack_mode = ev->detail;
461 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
462 }
463 XSync(dpy, False);
464}
465
466void
467destroynotify(XEvent *e) {
468 Client *c;
469 XDestroyWindowEvent *ev = &e->xdestroywindow;
470
471 if((c = getclient(ev->window)))
472 unmanage(c);
473}
474
475void
476detach(Client *c) {
477 Client **tc;
478
479 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
480 *tc = c->next;
481}
482
483void
484detachstack(Client *c) {
485 Client **tc;
486
487 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
488 *tc = c->snext;
489}
490
491void
492die(const char *errstr, ...) {
493 va_list ap;
494
495 va_start(ap, errstr);
496 vfprintf(stderr, errstr, ap);
497 va_end(ap);
498 exit(EXIT_FAILURE);
499}
500
501void
502drawbar(void) {
503 int x;
504 unsigned int i, occ = 0, urg = 0;
505 unsigned long *col;
506 Client *c;
507
508 for(c = clients; c; c = c->next) {
509 occ |= c->tags;
510 if(c->isurgent)
511 urg |= c->tags;
512 }
513
514 dc.x = 0;
515 for(i = 0; i < LENGTH(tags); i++) {
516 dc.w = TEXTW(tags[i]);
517 col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
518 drawtext(tags[i], col, urg & 1 << i);
519 drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
520 dc.x += dc.w;
521 }
522 if(blw > 0) {
523 dc.w = blw;
524 drawtext(lt[sellt]->symbol, dc.norm, False);
525 x = dc.x + dc.w;
526 }
527 else
528 x = dc.x;
529 dc.w = TEXTW(stext);
530 dc.x = ww - dc.w;
531 if(dc.x < x) {
532 dc.x = x;
533 dc.w = ww - x;
534 }
535 drawtext(stext, dc.norm, False);
536 if((dc.w = dc.x - x) > bh) {
537 dc.x = x;
538 if(sel) {
539 drawtext(sel->name, dc.sel, False);
540 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
541 }
542 else
543 drawtext(NULL, dc.norm, False);
544 }
545 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
546 XSync(dpy, False);
547}
548
549void
550drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
551 int x;
552 XGCValues gcv;
553 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
554
555 gcv.foreground = col[invert ? ColBG : ColFG];
556 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
557 x = (dc.font.ascent + dc.font.descent + 2) / 4;
558 r.x = dc.x + 1;
559 r.y = dc.y + 1;
560 if(filled) {
561 r.width = r.height = x + 1;
562 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
563 }
564 else if(empty) {
565 r.width = r.height = x;
566 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
567 }
568}
569
570void
571drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
572 char buf[256];
573 int i, x, y, h, len, olen;
574 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
575
576 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
577 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
578 if(!text)
579 return;
580 olen = strlen(text);
581 h = dc.font.ascent + dc.font.descent;
582 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
583 x = dc.x + (h / 2);
584 /* shorten text if necessary */
585 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
586 if(!len)
587 return;
588 memcpy(buf, text, len);
589 if(len < olen)
590 for(i = len; i && i > len - 3; buf[--i] = '.');
591 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
592 if(dc.font.set)
593 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
594 else
595 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
596}
597
598void
599enternotify(XEvent *e) {
600 Client *c;
601 XCrossingEvent *ev = &e->xcrossing;
602
603 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
604 return;
605 if((c = getclient(ev->window)))
606 focus(c);
607 else
608 focus(NULL);
609}
610
611void
612expose(XEvent *e) {
613 XExposeEvent *ev = &e->xexpose;
614
615 if(ev->count == 0 && (ev->window == barwin))
616 drawbar();
617}
618
619void
620focus(Client *c) {
621 if(!c || !ISVISIBLE(c))
622 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
623 if(sel && sel != c) {
624 grabbuttons(sel, False);
625 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
626 }
627 if(c) {
628 detachstack(c);
629 attachstack(c);
630 grabbuttons(c, True);
631 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
632 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
633 }
634 else
635 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
636 sel = c;
637 drawbar();
638}
639
640void
641focusin(XEvent *e) { /* there are some broken focus acquiring clients */
642 XFocusChangeEvent *ev = &e->xfocus;
643
644 if(sel && ev->window != sel->win)
645 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
646}
647
648void
649focusstack(const Arg *arg) {
650 Client *c = NULL, *i;
651
652 if(!sel)
653 return;
654 if (arg->i > 0) {
655 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
656 if(!c)
657 for(c = clients; c && !ISVISIBLE(c); c = c->next);
658 }
659 else {
660 for(i = clients; i != sel; i = i->next)
661 if(ISVISIBLE(i))
662 c = i;
663 if(!c)
664 for(; i; i = i->next)
665 if(ISVISIBLE(i))
666 c = i;
667 }
668 if(c) {
669 focus(c);
670 restack();
671 }
672}
673
674Client *
675getclient(Window w) {
676 Client *c;
677
678 for(c = clients; c && c->win != w; c = c->next);
679 return c;
680}
681
682unsigned long
683getcolor(const char *colstr) {
684 Colormap cmap = DefaultColormap(dpy, screen);
685 XColor color;
686
687 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
688 die("error, cannot allocate color '%s'\n", colstr);
689 return color.pixel;
690}
691
692long
693getstate(Window w) {
694 int format, status;
695 long result = -1;
696 unsigned char *p = NULL;
697 unsigned long n, extra;
698 Atom real;
699
700 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
701 &real, &format, &n, &extra, (unsigned char **)&p);
702 if(status != Success)
703 return -1;
704 if(n != 0)
705 result = *p;
706 XFree(p);
707 return result;
708}
709
710Bool
711gettextprop(Window w, Atom atom, char *text, unsigned int size) {
712 char **list = NULL;
713 int n;
714 XTextProperty name;
715
716 if(!text || size == 0)
717 return False;
718 text[0] = '\0';
719 XGetTextProperty(dpy, w, &name, atom);
720 if(!name.nitems)
721 return False;
722 if(name.encoding == XA_STRING)
723 strncpy(text, (char *)name.value, size - 1);
724 else {
725 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
726 && n > 0 && *list) {
727 strncpy(text, *list, size - 1);
728 XFreeStringList(list);
729 }
730 }
731 text[size - 1] = '\0';
732 XFree(name.value);
733 return True;
734}
735
736void
737grabbuttons(Client *c, Bool focused) {
738 unsigned int i, j;
739 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
740
741 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
742 if(focused) {
743 for(i = 0; i < LENGTH(buttons); i++)
744 if(buttons[i].click == ClkClientWin)
745 for(j = 0; j < LENGTH(modifiers); j++)
746 XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
747 } else
748 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
749 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
750}
751
752void
753grabkeys(void) {
754 unsigned int i, j;
755 XModifierKeymap *modmap;
756
757 /* update modifier map */
758 modmap = XGetModifierMapping(dpy);
759 for(i = 0; i < 8; i++)
760 for(j = 0; j < modmap->max_keypermod; j++)
761 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
762 numlockmask = (1 << i);
763 XFreeModifiermap(modmap);
764
765 { /* grab keys */
766 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
767 KeyCode code;
768
769 XUngrabKey(dpy, AnyKey, AnyModifier, root);
770 for(i = 0; i < LENGTH(keys); i++) {
771 code = XKeysymToKeycode(dpy, keys[i].keysym);
772 for(j = 0; j < LENGTH(modifiers); j++)
773 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root, True,
774 GrabModeAsync, GrabModeAsync);
775 }
776 }
777}
778
779void
780initfont(const char *fontstr) {
781 char *def, **missing;
782 int i, n;
783
784 missing = NULL;
785 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
786 if(missing) {
787 while(n--)
788 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
789 XFreeStringList(missing);
790 }
791 if(dc.font.set) {
792 XFontSetExtents *font_extents;
793 XFontStruct **xfonts;
794 char **font_names;
795 dc.font.ascent = dc.font.descent = 0;
796 font_extents = XExtentsOfFontSet(dc.font.set);
797 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
798 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
799 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
800 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
801 xfonts++;
802 }
803 }
804 else {
805 if(dc.font.xfont)
806 XFreeFont(dpy, dc.font.xfont);
807 dc.font.xfont = NULL;
808 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
809 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
810 die("error, cannot load font: '%s'\n", fontstr);
811 dc.font.ascent = dc.font.xfont->ascent;
812 dc.font.descent = dc.font.xfont->descent;
813 }
814 dc.font.height = dc.font.ascent + dc.font.descent;
815}
816
817Bool
818isprotodel(Client *c) {
819 int i, n;
820 Atom *protocols;
821 Bool ret = False;
822
823 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
824 for(i = 0; !ret && i < n; i++)
825 if(protocols[i] == wmatom[WMDelete])
826 ret = True;
827 XFree(protocols);
828 }
829 return ret;
830}
831
832void
833keypress(XEvent *e) {
834 unsigned int i;
835 KeySym keysym;
836 XKeyEvent *ev;
837
838 ev = &e->xkey;
839 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
840 for(i = 0; i < LENGTH(keys); i++)
841 if(keysym == keys[i].keysym
842 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
843 && keys[i].func)
844 keys[i].func(&(keys[i].arg));
845}
846
847void
848killclient(const Arg *arg) {
849 XEvent ev;
850
851 if(!sel)
852 return;
853 if(isprotodel(sel)) {
854 ev.type = ClientMessage;
855 ev.xclient.window = sel->win;
856 ev.xclient.message_type = wmatom[WMProtocols];
857 ev.xclient.format = 32;
858 ev.xclient.data.l[0] = wmatom[WMDelete];
859 ev.xclient.data.l[1] = CurrentTime;
860 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
861 }
862 else
863 XKillClient(dpy, sel->win);
864}
865
866void
867manage(Window w, XWindowAttributes *wa) {
868 Client *c, *t = NULL;
869 Window trans = None;
870 XWindowChanges wc;
871
872 if(!(c = calloc(1, sizeof(Client))))
873 die("fatal: could not calloc() %u bytes\n", sizeof(Client));
874 c->win = w;
875
876 /* geometry */
877 c->x = wa->x;
878 c->y = wa->y;
879 c->w = wa->width;
880 c->h = wa->height;
881 c->oldbw = wa->border_width;
882 if(c->w == sw && c->h == sh) {
883 c->x = sx;
884 c->y = sy;
885 c->bw = 0;
886 }
887 else {
888 if(c->x + c->w + 2 * c->bw > sx + sw)
889 c->x = sx + sw - c->w - 2 * c->bw;
890 if(c->y + c->h + 2 * c->bw > sy + sh)
891 c->y = sy + sh - c->h - 2 * c->bw;
892 c->x = MAX(c->x, sx);
893 /* only fix client y-offset, if the client center might cover the bar */
894 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
895 c->bw = borderpx;
896 }
897
898 wc.border_width = c->bw;
899 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
900 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
901 configure(c); /* propagates border_width, if size doesn't change */
902 updatesizehints(c);
903 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
904 grabbuttons(c, False);
905 updatetitle(c);
906 if(XGetTransientForHint(dpy, w, &trans))
907 t = getclient(trans);
908 if(t)
909 c->tags = t->tags;
910 else
911 applyrules(c);
912 if(!c->isfloating)
913 c->isfloating = trans != None || c->isfixed;
914 if(c->isfloating)
915 XRaiseWindow(dpy, c->win);
916 attach(c);
917 attachstack(c);
918 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
919 XMapWindow(dpy, c->win);
920 setclientstate(c, NormalState);
921 arrange();
922}
923
924void
925mappingnotify(XEvent *e) {
926 XMappingEvent *ev = &e->xmapping;
927
928 XRefreshKeyboardMapping(ev);
929 if(ev->request == MappingKeyboard)
930 grabkeys();
931}
932
933void
934maprequest(XEvent *e) {
935 static XWindowAttributes wa;
936 XMapRequestEvent *ev = &e->xmaprequest;
937
938 if(!XGetWindowAttributes(dpy, ev->window, &wa))
939 return;
940 if(wa.override_redirect)
941 return;
942 if(!getclient(ev->window))
943 manage(ev->window, &wa);
944}
945
946void
947monocle(void) {
948 Client *c;
949
950 for(c = nexttiled(clients); c; c = nexttiled(c->next))
951 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, resizehints);
952}
953
954void
955movemouse(const Arg *arg) {
956 int x, y, ocx, ocy, di, nx, ny;
957 unsigned int dui;
958 Client *c;
959 Window dummy;
960 XEvent ev;
961
962 if(!(c = sel))
963 return;
964 restack();
965 ocx = c->x;
966 ocy = c->y;
967 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
968 None, cursor[CurMove], CurrentTime) != GrabSuccess)
969 return;
970 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
971 do {
972 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
973 switch (ev.type) {
974 case ConfigureRequest:
975 case Expose:
976 case MapRequest:
977 handler[ev.type](&ev);
978 break;
979 case MotionNotify:
980 XSync(dpy, False);
981 nx = ocx + (ev.xmotion.x - x);
982 ny = ocy + (ev.xmotion.y - y);
983 if(snap && nx >= wx && nx <= wx + ww
984 && ny >= wy && ny <= wy + wh) {
985 if(abs(wx - nx) < snap)
986 nx = wx;
987 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
988 nx = wx + ww - c->w - 2 * c->bw;
989 if(abs(wy - ny) < snap)
990 ny = wy;
991 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
992 ny = wy + wh - c->h - 2 * c->bw;
993 if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
994 togglefloating(NULL);
995 }
996 if(!lt[sellt]->arrange || c->isfloating)
997 resize(c, nx, ny, c->w, c->h, False);
998 break;
999 }
1000 }
1001 while(ev.type != ButtonRelease);
1002 XUngrabPointer(dpy, CurrentTime);
1003}
1004
1005Client *
1006nexttiled(Client *c) {
1007 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1008 return c;
1009}
1010
1011void
1012propertynotify(XEvent *e) {
1013 Client *c;
1014 Window trans;
1015 XPropertyEvent *ev = &e->xproperty;
1016
1017 if(ev->state == PropertyDelete)
1018 return; /* ignore */
1019 if((c = getclient(ev->window))) {
1020 switch (ev->atom) {
1021 default: break;
1022 case XA_WM_TRANSIENT_FOR:
1023 XGetTransientForHint(dpy, c->win, &trans);
1024 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1025 arrange();
1026 break;
1027 case XA_WM_NORMAL_HINTS:
1028 updatesizehints(c);
1029 break;
1030 case XA_WM_HINTS:
1031 updatewmhints(c);
1032 drawbar();
1033 break;
1034 }
1035 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1036 updatetitle(c);
1037 if(c == sel)
1038 drawbar();
1039 }
1040 }
1041}
1042
1043void
1044quit(const Arg *arg) {
1045 readin = running = False;
1046}
1047
1048void
1049resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1050 XWindowChanges wc;
1051
1052 if(sizehints) {
1053 /* see last two sentences in ICCCM 4.1.2.3 */
1054 Bool baseismin = c->basew == c->minw && c->baseh == c->minh;
1055
1056 /* set minimum possible */
1057 w = MAX(1, w);
1058 h = MAX(1, h);
1059
1060 if(!baseismin) { /* temporarily remove base dimensions */
1061 w -= c->basew;
1062 h -= c->baseh;
1063 }
1064
1065 /* adjust for aspect limits */
1066 if(c->mina > 0 && c->maxa > 0) {
1067 if(c->maxa < (float)(w / h))
1068 w = h * c->maxa;
1069 else if(c->mina < (float)(h / w))
1070 h = w * c->mina;
1071 }
1072
1073 if(baseismin) { /* increment calculation requires this */
1074 w -= c->basew;
1075 h -= c->baseh;
1076 }
1077
1078 /* adjust for increment value */
1079 if(c->incw)
1080 w -= w % c->incw;
1081 if(c->inch)
1082 h -= h % c->inch;
1083
1084 /* restore base dimensions */
1085 w += c->basew;
1086 h += c->baseh;
1087
1088 w = MAX(w, c->minw);
1089 h = MAX(h, c->minh);
1090
1091 if(c->maxw)
1092 w = MIN(w, c->maxw);
1093
1094 if(c->maxh)
1095 h = MIN(h, c->maxh);
1096 }
1097 if(w <= 0 || h <= 0)
1098 return;
1099 if(x > sx + sw)
1100 x = sw - w - 2 * c->bw;
1101 if(y > sy + sh)
1102 y = sh - h - 2 * c->bw;
1103 if(x + w + 2 * c->bw < sx)
1104 x = sx;
1105 if(y + h + 2 * c->bw < sy)
1106 y = sy;
1107 if(h < bh)
1108 h = bh;
1109 if(w < bh)
1110 w = bh;
1111 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1112 c->x = wc.x = x;
1113 c->y = wc.y = y;
1114 c->w = wc.width = w;
1115 c->h = wc.height = h;
1116 wc.border_width = c->bw;
1117 XConfigureWindow(dpy, c->win,
1118 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1119 configure(c);
1120 XSync(dpy, False);
1121 }
1122}
1123
1124void
1125resizemouse(const Arg *arg) {
1126 int ocx, ocy;
1127 int nw, nh;
1128 Client *c;
1129 XEvent ev;
1130
1131 if(!(c = sel))
1132 return;
1133 restack();
1134 ocx = c->x;
1135 ocy = c->y;
1136 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1137 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1138 return;
1139 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1140 do {
1141 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1142 switch(ev.type) {
1143 case ConfigureRequest:
1144 case Expose:
1145 case MapRequest:
1146 handler[ev.type](&ev);
1147 break;
1148 case MotionNotify:
1149 XSync(dpy, False);
1150 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1151 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1152
1153 if(snap && nw >= wx && nw <= wx + ww
1154 && nh >= wy && nh <= wy + wh) {
1155 if(!c->isfloating && lt[sellt]->arrange
1156 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1157 togglefloating(NULL);
1158 }
1159 if(!lt[sellt]->arrange || c->isfloating)
1160 resize(c, c->x, c->y, nw, nh, True);
1161 break;
1162 }
1163 }
1164 while(ev.type != ButtonRelease);
1165 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1166 XUngrabPointer(dpy, CurrentTime);
1167 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1168}
1169
1170void
1171restack(void) {
1172 Client *c;
1173 XEvent ev;
1174 XWindowChanges wc;
1175
1176 drawbar();
1177 if(!sel)
1178 return;
1179 if(sel->isfloating || !lt[sellt]->arrange)
1180 XRaiseWindow(dpy, sel->win);
1181 if(lt[sellt]->arrange) {
1182 wc.stack_mode = Below;
1183 wc.sibling = barwin;
1184 for(c = stack; c; c = c->snext)
1185 if(!c->isfloating && ISVISIBLE(c)) {
1186 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1187 wc.sibling = c->win;
1188 }
1189 }
1190 XSync(dpy, False);
1191 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1192}
1193
1194void
1195run(void) {
1196 char *p;
1197 char sbuf[sizeof stext];
1198 fd_set rd;
1199 int r, xfd;
1200 unsigned int len, offset;
1201 XEvent ev;
1202
1203 /* main event loop, also reads status text from stdin */
1204 XSync(dpy, False);
1205 xfd = ConnectionNumber(dpy);
1206 offset = 0;
1207 len = sizeof stext - 1;
1208 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1209 while(running) {
1210 FD_ZERO(&rd);
1211 if(readin)
1212 FD_SET(STDIN_FILENO, &rd);
1213 FD_SET(xfd, &rd);
1214 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1215 if(errno == EINTR)
1216 continue;
1217 die("select failed\n");
1218 }
1219 if(FD_ISSET(STDIN_FILENO, &rd)) {
1220 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1221 case -1:
1222 strncpy(stext, strerror(errno), len);
1223 readin = False;
1224 break;
1225 case 0:
1226 strncpy(stext, "EOF", 4);
1227 readin = False;
1228 break;
1229 default:
1230 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1231 if(*p == '\n' || *p == '\0') {
1232 *p = '\0';
1233 strncpy(stext, sbuf, len);
1234 p += r - 1; /* p is sbuf + offset + r - 1 */
1235 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1236 offset = r;
1237 if(r)
1238 memmove(sbuf, p - r + 1, r);
1239 break;
1240 }
1241 break;
1242 }
1243 drawbar();
1244 }
1245 while(XPending(dpy)) {
1246 XNextEvent(dpy, &ev);
1247 if(handler[ev.type])
1248 (handler[ev.type])(&ev); /* call handler */
1249 }
1250 }
1251}
1252
1253void
1254scan(void) {
1255 unsigned int i, num;
1256 Window d1, d2, *wins = NULL;
1257 XWindowAttributes wa;
1258
1259 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1260 for(i = 0; i < num; i++) {
1261 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1262 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1263 continue;
1264 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1265 manage(wins[i], &wa);
1266 }
1267 for(i = 0; i < num; i++) { /* now the transients */
1268 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1269 continue;
1270 if(XGetTransientForHint(dpy, wins[i], &d1)
1271 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1272 manage(wins[i], &wa);
1273 }
1274 if(wins)
1275 XFree(wins);
1276 }
1277}
1278
1279void
1280setclientstate(Client *c, long state) {
1281 long data[] = {state, None};
1282
1283 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1284 PropModeReplace, (unsigned char *)data, 2);
1285}
1286
1287void
1288setlayout(const Arg *arg) {
1289 if(!arg || !arg->v || arg->v != lt[sellt])
1290 sellt ^= 1;
1291 if(arg && arg->v)
1292 lt[sellt] = (Layout *)arg->v;
1293 if(sel)
1294 arrange();
1295 else
1296 drawbar();
1297}
1298
1299/* arg > 1.0 will set mfact absolutly */
1300void
1301setmfact(const Arg *arg) {
1302 float f;
1303
1304 if(!arg || !lt[sellt]->arrange)
1305 return;
1306 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1307 if(f < 0.1 || f > 0.9)
1308 return;
1309 mfact = f;
1310 arrange();
1311}
1312
1313void
1314setup(void) {
1315 unsigned int i;
1316 int w;
1317 XSetWindowAttributes wa;
1318
1319 /* init screen */
1320 screen = DefaultScreen(dpy);
1321 root = RootWindow(dpy, screen);
1322 initfont(font);
1323 sx = 0;
1324 sy = 0;
1325 sw = DisplayWidth(dpy, screen);
1326 sh = DisplayHeight(dpy, screen);
1327 bh = dc.h = dc.font.height + 2;
1328 lt[0] = &layouts[0];
1329 lt[1] = &layouts[1 % LENGTH(layouts)];
1330 updategeom();
1331
1332 /* init atoms */
1333 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1334 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1335 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1336 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1337 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1338 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1339
1340 /* init cursors */
1341 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1342 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1343 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1344
1345 /* init appearance */
1346 dc.norm[ColBorder] = getcolor(normbordercolor);
1347 dc.norm[ColBG] = getcolor(normbgcolor);
1348 dc.norm[ColFG] = getcolor(normfgcolor);
1349 dc.sel[ColBorder] = getcolor(selbordercolor);
1350 dc.sel[ColBG] = getcolor(selbgcolor);
1351 dc.sel[ColFG] = getcolor(selfgcolor);
1352 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1353 dc.gc = XCreateGC(dpy, root, 0, 0);
1354 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1355 if(!dc.font.set)
1356 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1357
1358 /* init bar */
1359 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1360 w = TEXTW(layouts[i].symbol);
1361 blw = MAX(blw, w);
1362 }
1363
1364 wa.override_redirect = 1;
1365 wa.background_pixmap = ParentRelative;
1366 wa.event_mask = ButtonPressMask|ExposureMask;
1367
1368 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1369 CopyFromParent, DefaultVisual(dpy, screen),
1370 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1371 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1372 XMapRaised(dpy, barwin);
1373 strcpy(stext, "dwm-"VERSION);
1374 drawbar();
1375
1376 /* EWMH support per view */
1377 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1378 PropModeReplace, (unsigned char *) netatom, NetLast);
1379
1380 /* select for events */
1381 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1382 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1383 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1384 XSelectInput(dpy, root, wa.event_mask);
1385
1386 grabkeys();
1387}
1388
1389void
1390spawn(const Arg *arg) {
1391 /* The double-fork construct avoids zombie processes and keeps the code
1392 * clean from stupid signal handlers. */
1393 if(fork() == 0) {
1394 if(fork() == 0) {
1395 if(dpy)
1396 close(ConnectionNumber(dpy));
1397 setsid();
1398 execvp(((char **)arg->v)[0], (char **)arg->v);
1399 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1400 perror(" failed");
1401 }
1402 exit(0);
1403 }
1404 wait(0);
1405}
1406
1407void
1408tag(const Arg *arg) {
1409 if(sel && arg->ui & TAGMASK) {
1410 sel->tags = arg->ui & TAGMASK;
1411 arrange();
1412 }
1413}
1414
1415int
1416textnw(const char *text, unsigned int len) {
1417 XRectangle r;
1418
1419 if(dc.font.set) {
1420 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1421 return r.width;
1422 }
1423 return XTextWidth(dc.font.xfont, text, len);
1424}
1425
1426void
1427tile(void) {
1428 int x, y, h, w, mw;
1429 unsigned int i, n;
1430 Client *c;
1431
1432 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1433 if(n == 0)
1434 return;
1435
1436 /* master */
1437 c = nexttiled(clients);
1438 mw = mfact * ww;
1439 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1440
1441 if(--n == 0)
1442 return;
1443
1444 /* tile stack */
1445 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1446 y = wy;
1447 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1448 h = wh / n;
1449 if(h < bh)
1450 h = wh;
1451
1452 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1453 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1454 ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
1455 if(h != wh)
1456 y = c->y + c->h + 2 * c->bw;
1457 }
1458}
1459
1460void
1461togglebar(const Arg *arg) {
1462 showbar = !showbar;
1463 updategeom();
1464 updatebar();
1465 arrange();
1466}
1467
1468void
1469togglefloating(const Arg *arg) {
1470 if(!sel)
1471 return;
1472 sel->isfloating = !sel->isfloating || sel->isfixed;
1473 if(sel->isfloating)
1474 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1475 arrange();
1476}
1477
1478void
1479toggletag(const Arg *arg) {
1480 unsigned int mask;
1481
1482 if (!sel)
1483 return;
1484
1485 mask = sel->tags ^ (arg->ui & TAGMASK);
1486 if(sel && mask) {
1487 sel->tags = mask;
1488 arrange();
1489 }
1490}
1491
1492void
1493toggleview(const Arg *arg) {
1494 unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1495
1496 if(mask) {
1497 tagset[seltags] = mask;
1498 clearurgent();
1499 arrange();
1500 }
1501}
1502
1503void
1504unmanage(Client *c) {
1505 XWindowChanges wc;
1506
1507 wc.border_width = c->oldbw;
1508 /* The server grab construct avoids race conditions. */
1509 XGrabServer(dpy);
1510 XSetErrorHandler(xerrordummy);
1511 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1512 detach(c);
1513 detachstack(c);
1514 if(sel == c)
1515 focus(NULL);
1516 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1517 setclientstate(c, WithdrawnState);
1518 free(c);
1519 XSync(dpy, False);
1520 XSetErrorHandler(xerror);
1521 XUngrabServer(dpy);
1522 arrange();
1523}
1524
1525void
1526unmapnotify(XEvent *e) {
1527 Client *c;
1528 XUnmapEvent *ev = &e->xunmap;
1529
1530 if((c = getclient(ev->window)))
1531 unmanage(c);
1532}
1533
1534void
1535updatebar(void) {
1536 if(dc.drawable != 0)
1537 XFreePixmap(dpy, dc.drawable);
1538 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1539 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1540}
1541
1542void
1543updategeom(void) {
1544#ifdef XINERAMA
1545 int n, i = 0;
1546 XineramaScreenInfo *info = NULL;
1547
1548 /* window area geometry */
1549 if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
1550 if(n > 1) {
1551 int di, x, y;
1552 unsigned int dui;
1553 Window dummy;
1554 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1555 for(i = 0; i < n; i++)
1556 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
1557 break;
1558 }
1559 wx = info[i].x_org;
1560 wy = showbar && topbar ? info[i].y_org + bh : info[i].y_org;
1561 ww = info[i].width;
1562 wh = showbar ? info[i].height - bh : info[i].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(ISVISIBLE(c) && wmh->flags & XUrgencyHint) {
1638 wmh->flags &= ~XUrgencyHint;
1639 XSetWMHints(dpy, c->win, wmh);
1640 }
1641 else
1642 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1643
1644 XFree(wmh);
1645 }
1646}
1647
1648void
1649view(const Arg *arg) {
1650 if((arg->ui & TAGMASK) == tagset[seltags])
1651 return;
1652 seltags ^= 1; /* toggle sel tagset */
1653 if(arg->ui & TAGMASK)
1654 tagset[seltags] = arg->ui & TAGMASK;
1655 clearurgent();
1656 arrange();
1657}
1658
1659/* There's no way to check accesses to destroyed windows, thus those cases are
1660 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1661 * default error handler, which may call exit. */
1662int
1663xerror(Display *dpy, XErrorEvent *ee) {
1664 if(ee->error_code == BadWindow
1665 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1666 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1667 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1668 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1669 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1670 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1671 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1672 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1673 return 0;
1674 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1675 ee->request_code, ee->error_code);
1676 return xerrorxlib(dpy, ee); /* may call exit */
1677}
1678
1679int
1680xerrordummy(Display *dpy, XErrorEvent *ee) {
1681 return 0;
1682}
1683
1684/* Startup Error handler to check if another window manager
1685 * is already running. */
1686int
1687xerrorstart(Display *dpy, XErrorEvent *ee) {
1688 otherwm = True;
1689 return -1;
1690}
1691
1692void
1693zoom(const Arg *arg) {
1694 Client *c = sel;
1695
1696 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1697 return;
1698 if(c == nexttiled(clients))
1699 if(!c || !(c = nexttiled(c->next)))
1700 return;
1701 detach(c);
1702 attach(c);
1703 focus(c);
1704 arrange();
1705}
1706
1707int
1708main(int argc, char *argv[]) {
1709 if(argc == 2 && !strcmp("-v", argv[1]))
1710 die("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1711 else if(argc != 1)
1712 die("usage: dwm [-v]\n");
1713
1714 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1715 fprintf(stderr, "warning: no locale support\n");
1716
1717 if(!(dpy = XOpenDisplay(0)))
1718 die("dwm: cannot open display\n");
1719
1720 checkotherwm();
1721 setup();
1722 scan();
1723 run();
1724 cleanup();
1725
1726 XCloseDisplay(dpy);
1727 return 0;
1728}