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crash fix
[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * 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 */
58 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
61 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
62
63 /* typedefs */
64 typedef unsigned int uint;
65 typedef unsigned long ulong;
66 typedef struct Client Client;
67 struct Client {
68 char name[256];
69 int x, y, w, h;
70 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
71 float mina, maxa;
72 int bw, oldbw;
73 Bool isbanned, isfixed, isfloating, ismoved, isurgent;
74 uint tags;
75 Client *next;
76 Client *snext;
77 Window win;
78 };
79
80 typedef struct {
81 int x, y, w, h;
82 ulong norm[ColLast];
83 ulong sel[ColLast];
84 Drawable drawable;
85 GC gc;
86 struct {
87 int ascent;
88 int descent;
89 int height;
90 XFontSet set;
91 XFontStruct *xfont;
92 } font;
93 } DC; /* draw context */
94
95 typedef union {
96 int i;
97 uint ui;
98 float f;
99 void *v;
100 } Arg;
101
102 typedef struct {
103 uint mod;
104 KeySym keysym;
105 void (*func)(const Arg *);
106 const Arg arg;
107 } Key;
108
109 typedef struct {
110 const char *symbol;
111 void (*arrange)(void);
112 } Layout;
113
114 typedef struct {
115 const char *class;
116 const char *instance;
117 const char *title;
118 uint tags;
119 Bool isfloating;
120 } Rule;
121
122 /* function declarations */
123 static void applyrules(Client *c);
124 static void arrange(void);
125 static void attach(Client *c);
126 static void attachstack(Client *c);
127 static void buttonpress(XEvent *e);
128 static void checkotherwm(void);
129 static void cleanup(void);
130 static void configure(Client *c);
131 static void configurenotify(XEvent *e);
132 static void configurerequest(XEvent *e);
133 static void destroynotify(XEvent *e);
134 static void detach(Client *c);
135 static void detachstack(Client *c);
136 static void drawbar(void);
137 static void drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]);
138 static void drawtext(const char *text, ulong col[ColLast], Bool invert);
139 static void enternotify(XEvent *e);
140 static void eprint(const char *errstr, ...);
141 static void expose(XEvent *e);
142 static void focus(Client *c);
143 static void focusin(XEvent *e);
144 static void focusstack(const Arg *arg);
145 static Client *getclient(Window w);
146 static ulong getcolor(const char *colstr);
147 static long getstate(Window w);
148 static Bool gettextprop(Window w, Atom atom, char *text, uint size);
149 static void grabbuttons(Client *c, Bool focused);
150 static void grabkeys(void);
151 static void initfont(const char *fontstr);
152 static Bool isoccupied(uint t);
153 static Bool isprotodel(Client *c);
154 static Bool isurgent(uint t);
155 static void keypress(XEvent *e);
156 static void killclient(const Arg *arg);
157 static void manage(Window w, XWindowAttributes *wa);
158 static void mappingnotify(XEvent *e);
159 static void maprequest(XEvent *e);
160 static void movemouse(Client *c);
161 static Client *nexttiled(Client *c);
162 static void propertynotify(XEvent *e);
163 static void quit(const Arg *arg);
164 static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
165 static void resizemouse(Client *c);
166 static void restack(void);
167 static void run(void);
168 static void scan(void);
169 static void setclientstate(Client *c, long state);
170 static void setmfact(const Arg *arg);
171 static void setup(void);
172 static void spawn(const Arg *arg);
173 static void tag(const Arg *arg);
174 static int textnw(const char *text, uint len);
175 static void tile(void);
176 static void togglebar(const Arg *arg);
177 static void togglefloating(const Arg *arg);
178 static void togglelayout(const Arg *arg);
179 static void togglemax(const Arg *arg);
180 static void toggletag(const Arg *arg);
181 static void toggleview(const Arg *arg);
182 static void unmanage(Client *c);
183 static void unmapnotify(XEvent *e);
184 static void updatebar(void);
185 static void updategeom(void);
186 static void updatesizehints(Client *c);
187 static void updatetitle(Client *c);
188 static void updatewmhints(Client *c);
189 static void view(const Arg *arg);
190 static int xerror(Display *dpy, XErrorEvent *ee);
191 static int xerrordummy(Display *dpy, XErrorEvent *ee);
192 static int xerrorstart(Display *dpy, XErrorEvent *ee);
193 static void zoom(const Arg *arg);
194
195 /* variables */
196 static char stext[256];
197 static int screen, sx, sy, sw, sh;
198 static int by, bh, blw, wx, wy, ww, wh;
199 static uint seltags = 0;
200 static int (*xerrorxlib)(Display *, XErrorEvent *);
201 static uint numlockmask = 0;
202 static void (*handler[LASTEvent]) (XEvent *) = {
203 [ButtonPress] = buttonpress,
204 [ConfigureRequest] = configurerequest,
205 [ConfigureNotify] = configurenotify,
206 [DestroyNotify] = destroynotify,
207 [EnterNotify] = enternotify,
208 [Expose] = expose,
209 [FocusIn] = focusin,
210 [KeyPress] = keypress,
211 [MappingNotify] = mappingnotify,
212 [MapRequest] = maprequest,
213 [PropertyNotify] = propertynotify,
214 [UnmapNotify] = unmapnotify
215 };
216 static Atom wmatom[WMLast], netatom[NetLast];
217 static Bool ismax = False;
218 static Bool otherwm, readin;
219 static Bool running = True;
220 static uint tagset[] = {1, 1}; /* after start, first tag is selected */
221 static Client *clients = NULL;
222 static Client *sel = NULL;
223 static Client *stack = NULL;
224 static Cursor cursor[CurLast];
225 static Display *dpy;
226 static DC dc = {0};
227 static Layout *lt = NULL;
228 static Window root, barwin;
229 /* configuration, allows nested code to access above variables */
230 #include "config.h"
231
232 /* compile-time check if all tags fit into an uint bit array. */
233 struct NumTags { char limitexceeded[sizeof(uint) * 8 < LENGTH(tags) ? -1 : 1]; };
234
235 /* function implementations */
236 void
237 applyrules(Client *c) {
238 uint i;
239 Rule *r;
240 XClassHint ch = { 0 };
241
242 /* rule matching */
243 XGetClassHint(dpy, c->win, &ch);
244 for(i = 0; i < LENGTH(rules); i++) {
245 r = &rules[i];
246 if((!r->title || strstr(c->name, r->title))
247 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
248 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
249 c->isfloating = r->isfloating;
250 c->tags |= r->tags & TAGMASK;
251 }
252 }
253 if(ch.res_class)
254 XFree(ch.res_class);
255 if(ch.res_name)
256 XFree(ch.res_name);
257 if(!c->tags)
258 c->tags = tagset[seltags];
259 }
260
261 void
262 arrange(void) {
263 Client *c;
264
265 for(c = clients; c; c = c->next)
266 if(c->tags & tagset[seltags]) { /* is visible */
267 if(ismax && !c->isfixed) {
268 XMoveResizeWindow(dpy, c->win, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
269 c->ismoved = True;
270 }
271 else if(!lt->arrange || c->isfloating)
272 resize(c, c->x, c->y, c->w, c->h, True);
273 c->isbanned = False;
274 }
275 else if(!c->isbanned) {
276 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
277 c->isbanned = c->ismoved = True;
278 }
279
280 focus(NULL);
281 if(lt->arrange && !ismax)
282 lt->arrange();
283 restack();
284 }
285
286 void
287 attach(Client *c) {
288 c->next = clients;
289 clients = c;
290 }
291
292 void
293 attachstack(Client *c) {
294 c->snext = stack;
295 stack = c;
296 }
297
298 void
299 buttonpress(XEvent *e) {
300 uint i, mask;
301 int x;
302 Client *c;
303 XButtonPressedEvent *ev = &e->xbutton;
304
305 if(ev->window == barwin) {
306 x = 0;
307 for(i = 0; i < LENGTH(tags); i++) {
308 x += TEXTW(tags[i]);
309 if(ev->x < x) {
310 mask = 1 << i;
311 if(ev->button == Button1) {
312 if(ev->state & MODKEY)
313 tag((Arg*)&mask);
314 else
315 view((Arg*)&mask);
316 }
317 else if(ev->button == Button3) {
318 if(ev->state & MODKEY)
319 toggletag((Arg*)&mask);
320 else
321 toggleview((Arg*)&mask);
322 }
323 return;
324 }
325 }
326 if(ev->x < x + blw) {
327 if(ev->button == Button1)
328 togglelayout(NULL);
329 else if(ev->button == Button3)
330 togglemax(NULL);
331 }
332 }
333 else if((c = getclient(ev->window))) {
334 focus(c);
335 if(CLEANMASK(ev->state) != MODKEY || (ismax && !c->isfixed))
336 return;
337 if(ev->button == Button1)
338 movemouse(c);
339 else if(ev->button == Button2)
340 togglefloating(NULL);
341 else if(ev->button == Button3 && !c->isfixed)
342 resizemouse(c);
343 }
344 }
345
346 void
347 checkotherwm(void) {
348 otherwm = False;
349 XSetErrorHandler(xerrorstart);
350
351 /* this causes an error if some other window manager is running */
352 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
353 XSync(dpy, False);
354 if(otherwm)
355 eprint("dwm: another window manager is already running\n");
356 XSetErrorHandler(NULL);
357 xerrorxlib = XSetErrorHandler(xerror);
358 XSync(dpy, False);
359 }
360
361 void
362 cleanup(void) {
363 Arg a = {.i = ~0};
364 Layout foo = { "", NULL };
365
366 close(STDIN_FILENO);
367 view(&a);
368 lt = &foo;
369 while(stack)
370 unmanage(stack);
371 if(dc.font.set)
372 XFreeFontSet(dpy, dc.font.set);
373 else
374 XFreeFont(dpy, dc.font.xfont);
375 XUngrabKey(dpy, AnyKey, AnyModifier, root);
376 XFreePixmap(dpy, dc.drawable);
377 XFreeGC(dpy, dc.gc);
378 XFreeCursor(dpy, cursor[CurNormal]);
379 XFreeCursor(dpy, cursor[CurResize]);
380 XFreeCursor(dpy, cursor[CurMove]);
381 XDestroyWindow(dpy, barwin);
382 XSync(dpy, False);
383 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
384 }
385
386 void
387 configure(Client *c) {
388 XConfigureEvent ce;
389
390 ce.type = ConfigureNotify;
391 ce.display = dpy;
392 ce.event = c->win;
393 ce.window = c->win;
394 ce.x = c->x;
395 ce.y = c->y;
396 ce.width = c->w;
397 ce.height = c->h;
398 ce.border_width = c->bw;
399 ce.above = None;
400 ce.override_redirect = False;
401 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
402 }
403
404 void
405 configurenotify(XEvent *e) {
406 XConfigureEvent *ev = &e->xconfigure;
407
408 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
409 sw = ev->width;
410 sh = ev->height;
411 updategeom();
412 updatebar();
413 arrange();
414 }
415 }
416
417 void
418 configurerequest(XEvent *e) {
419 Client *c;
420 XConfigureRequestEvent *ev = &e->xconfigurerequest;
421 XWindowChanges wc;
422
423 if((c = getclient(ev->window))) {
424 if(ev->value_mask & CWBorderWidth)
425 c->bw = ev->border_width;
426 if(ismax && !c->isbanned && !c->isfixed)
427 XMoveResizeWindow(dpy, c->win, wx, wy, ww - 2 * c->bw, wh + 2 * c->bw);
428 else if(c->isfloating || !lt->arrange) {
429 if(ev->value_mask & CWX)
430 c->x = sx + ev->x;
431 if(ev->value_mask & CWY)
432 c->y = sy + ev->y;
433 if(ev->value_mask & CWWidth)
434 c->w = ev->width;
435 if(ev->value_mask & CWHeight)
436 c->h = ev->height;
437 if((c->x - sx + c->w) > sw && c->isfloating)
438 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
439 if((c->y - sy + c->h) > sh && c->isfloating)
440 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
441 if((ev->value_mask & (CWX|CWY))
442 && !(ev->value_mask & (CWWidth|CWHeight)))
443 configure(c);
444 if(!c->isbanned)
445 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
446 }
447 else
448 configure(c);
449 }
450 else {
451 wc.x = ev->x;
452 wc.y = ev->y;
453 wc.width = ev->width;
454 wc.height = ev->height;
455 wc.border_width = ev->border_width;
456 wc.sibling = ev->above;
457 wc.stack_mode = ev->detail;
458 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
459 }
460 XSync(dpy, False);
461 }
462
463 void
464 destroynotify(XEvent *e) {
465 Client *c;
466 XDestroyWindowEvent *ev = &e->xdestroywindow;
467
468 if((c = getclient(ev->window)))
469 unmanage(c);
470 }
471
472 void
473 detach(Client *c) {
474 Client *i;
475
476 if (c != clients) {
477 for(i = clients; i->next != c; i = i->next);
478 i->next = c->next;
479 }
480 else {
481 clients = c->next;
482 }
483 c->next = NULL;
484 }
485
486 void
487 detachstack(Client *c) {
488 Client **tc;
489
490 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
491 *tc = c->snext;
492 }
493
494 void
495 drawbar(void) {
496 int i, x;
497 Client *c;
498
499 dc.x = 0;
500 for(c = stack; c && c->isbanned; c = c->snext);
501 for(i = 0; i < LENGTH(tags); i++) {
502 dc.w = TEXTW(tags[i]);
503 if(tagset[seltags] & 1 << i) {
504 drawtext(tags[i], dc.sel, isurgent(i));
505 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.sel);
506 }
507 else {
508 drawtext(tags[i], dc.norm, isurgent(i));
509 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.norm);
510 }
511 dc.x += dc.w;
512 }
513 if(blw > 0) {
514 dc.w = blw;
515 drawtext(lt->symbol, dc.norm, ismax);
516 x = dc.x + dc.w;
517 }
518 else
519 x = dc.x;
520 dc.w = TEXTW(stext);
521 dc.x = ww - dc.w;
522 if(dc.x < x) {
523 dc.x = x;
524 dc.w = ww - x;
525 }
526 drawtext(stext, dc.norm, False);
527 if((dc.w = dc.x - x) > bh) {
528 dc.x = x;
529 if(c) {
530 drawtext(c->name, dc.sel, False);
531 drawsquare(c->isfixed, c->isfloating, False, dc.sel);
532 }
533 else
534 drawtext(NULL, dc.norm, False);
535 }
536 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
537 XSync(dpy, False);
538 }
539
540 void
541 drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]) {
542 int x;
543 XGCValues gcv;
544 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
545
546 gcv.foreground = col[invert ? ColBG : ColFG];
547 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
548 x = (dc.font.ascent + dc.font.descent + 2) / 4;
549 r.x = dc.x + 1;
550 r.y = dc.y + 1;
551 if(filled) {
552 r.width = r.height = x + 1;
553 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
554 }
555 else if(empty) {
556 r.width = r.height = x;
557 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
558 }
559 }
560
561 void
562 drawtext(const char *text, ulong col[ColLast], Bool invert) {
563 int i, x, y, h, len, olen;
564 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
565 char buf[256];
566
567 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
568 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
569 if(!text)
570 return;
571 olen = strlen(text);
572 len = MIN(olen, sizeof buf);
573 memcpy(buf, text, len);
574 h = dc.font.ascent + dc.font.descent;
575 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
576 x = dc.x + (h / 2);
577 /* shorten text if necessary */
578 for(; len && (i = textnw(buf, len)) > dc.w - h; len--);
579 if(!len)
580 return;
581 if(len < olen)
582 for(i = len; i && i > len - 3; buf[--i] = '.');
583 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
584 if(dc.font.set)
585 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
586 else
587 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
588 }
589
590 void
591 enternotify(XEvent *e) {
592 Client *c;
593 XCrossingEvent *ev = &e->xcrossing;
594
595 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
596 return;
597 if((c = getclient(ev->window)))
598 focus(c);
599 else
600 focus(NULL);
601 }
602
603 void
604 eprint(const char *errstr, ...) {
605 va_list ap;
606
607 va_start(ap, errstr);
608 vfprintf(stderr, errstr, ap);
609 va_end(ap);
610 exit(EXIT_FAILURE);
611 }
612
613 void
614 expose(XEvent *e) {
615 XExposeEvent *ev = &e->xexpose;
616
617 if(ev->count == 0 && (ev->window == barwin))
618 drawbar();
619 }
620
621 void
622 focus(Client *c) {
623 if(!c || c->isbanned)
624 for(c = stack; c && c->isbanned; c = c->snext);
625 if(sel && sel != c) {
626 grabbuttons(sel, False);
627 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
628 }
629 if(c) {
630 detachstack(c);
631 attachstack(c);
632 grabbuttons(c, True);
633 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
634 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
635 }
636 else
637 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
638 sel = c;
639 drawbar();
640 }
641
642 void
643 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
644 XFocusChangeEvent *ev = &e->xfocus;
645
646 if(sel && ev->window != sel->win)
647 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
648 }
649
650 void
651 focusstack(const Arg *arg) {
652 Client *c = NULL, *i;
653
654 if(!sel)
655 return;
656 if (arg->i > 0) {
657 for(c = sel->next; c && c->isbanned; c = c->next);
658 if(!c)
659 for(c = clients; c && c->isbanned; c = c->next);
660 }
661 else {
662 for(i = clients; i != sel; i = i->next)
663 if (!i->isbanned)
664 c = i;
665 if(!c)
666 for(; i; i = i->next)
667 if (!i->isbanned)
668 c = i;
669 }
670 if(c) {
671 focus(c);
672 restack();
673 }
674 }
675
676 Client *
677 getclient(Window w) {
678 Client *c;
679
680 for(c = clients; c && c->win != w; c = c->next);
681 return c;
682 }
683
684 ulong
685 getcolor(const char *colstr) {
686 Colormap cmap = DefaultColormap(dpy, screen);
687 XColor color;
688
689 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
690 eprint("error, cannot allocate color '%s'\n", colstr);
691 return color.pixel;
692 }
693
694 long
695 getstate(Window w) {
696 int format, status;
697 long result = -1;
698 unsigned char *p = NULL;
699 ulong n, extra;
700 Atom real;
701
702 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
703 &real, &format, &n, &extra, (unsigned char **)&p);
704 if(status != Success)
705 return -1;
706 if(n != 0)
707 result = *p;
708 XFree(p);
709 return result;
710 }
711
712 Bool
713 gettextprop(Window w, Atom atom, char *text, uint size) {
714 char **list = NULL;
715 int n;
716 XTextProperty name;
717
718 if(!text || size == 0)
719 return False;
720 text[0] = '\0';
721 XGetTextProperty(dpy, w, &name, atom);
722 if(!name.nitems)
723 return False;
724 if(name.encoding == XA_STRING)
725 strncpy(text, (char *)name.value, size - 1);
726 else {
727 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
728 && n > 0 && *list) {
729 strncpy(text, *list, size - 1);
730 XFreeStringList(list);
731 }
732 }
733 text[size - 1] = '\0';
734 XFree(name.value);
735 return True;
736 }
737
738 void
739 grabbuttons(Client *c, Bool focused) {
740 int i, j;
741 uint buttons[] = { Button1, Button2, Button3 };
742 uint modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask, MODKEY|numlockmask|LockMask };
743
744 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
745 if(focused)
746 for(i = 0; i < LENGTH(buttons); i++)
747 for(j = 0; j < LENGTH(modifiers); j++)
748 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
749 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
750 else
751 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
752 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
753 }
754
755 void
756 grabkeys(void) {
757 uint i, j;
758 KeyCode code;
759 XModifierKeymap *modmap;
760
761 /* init modifier map */
762 modmap = XGetModifierMapping(dpy);
763 for(i = 0; i < 8; i++)
764 for(j = 0; j < modmap->max_keypermod; j++) {
765 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
766 numlockmask = (1 << i);
767 }
768 XFreeModifiermap(modmap);
769
770 XUngrabKey(dpy, AnyKey, AnyModifier, root);
771 for(i = 0; i < LENGTH(keys); i++) {
772 code = XKeysymToKeycode(dpy, keys[i].keysym);
773 XGrabKey(dpy, code, keys[i].mod, root, True,
774 GrabModeAsync, GrabModeAsync);
775 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
776 GrabModeAsync, GrabModeAsync);
777 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
778 GrabModeAsync, GrabModeAsync);
779 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
780 GrabModeAsync, GrabModeAsync);
781 }
782 }
783
784 void
785 initfont(const char *fontstr) {
786 char *def, **missing;
787 int i, n;
788
789 missing = NULL;
790 if(dc.font.set)
791 XFreeFontSet(dpy, dc.font.set);
792 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
793 if(missing) {
794 while(n--)
795 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
796 XFreeStringList(missing);
797 }
798 if(dc.font.set) {
799 XFontSetExtents *font_extents;
800 XFontStruct **xfonts;
801 char **font_names;
802 dc.font.ascent = dc.font.descent = 0;
803 font_extents = XExtentsOfFontSet(dc.font.set);
804 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
805 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
806 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
807 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
808 xfonts++;
809 }
810 }
811 else {
812 if(dc.font.xfont)
813 XFreeFont(dpy, dc.font.xfont);
814 dc.font.xfont = NULL;
815 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
816 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
817 eprint("error, cannot load font: '%s'\n", fontstr);
818 dc.font.ascent = dc.font.xfont->ascent;
819 dc.font.descent = dc.font.xfont->descent;
820 }
821 dc.font.height = dc.font.ascent + dc.font.descent;
822 }
823
824 Bool
825 isoccupied(uint t) {
826 Client *c;
827
828 for(c = clients; c; c = c->next)
829 if(c->tags & 1 << t)
830 return True;
831 return False;
832 }
833
834 Bool
835 isprotodel(Client *c) {
836 int i, n;
837 Atom *protocols;
838 Bool ret = False;
839
840 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
841 for(i = 0; !ret && i < n; i++)
842 if(protocols[i] == wmatom[WMDelete])
843 ret = True;
844 XFree(protocols);
845 }
846 return ret;
847 }
848
849 Bool
850 isurgent(uint t) {
851 Client *c;
852
853 for(c = clients; c; c = c->next)
854 if(c->isurgent && c->tags & 1 << t)
855 return True;
856 return False;
857 }
858
859 void
860 keypress(XEvent *e) {
861 uint i;
862 KeySym keysym;
863 XKeyEvent *ev;
864
865 ev = &e->xkey;
866 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
867 for(i = 0; i < LENGTH(keys); i++)
868 if(keysym == keys[i].keysym
869 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
870 && keys[i].func)
871 keys[i].func(&(keys[i].arg));
872 }
873
874 void
875 killclient(const Arg *arg) {
876 XEvent ev;
877
878 if(!sel)
879 return;
880 if(isprotodel(sel)) {
881 ev.type = ClientMessage;
882 ev.xclient.window = sel->win;
883 ev.xclient.message_type = wmatom[WMProtocols];
884 ev.xclient.format = 32;
885 ev.xclient.data.l[0] = wmatom[WMDelete];
886 ev.xclient.data.l[1] = CurrentTime;
887 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
888 }
889 else
890 XKillClient(dpy, sel->win);
891 }
892
893 void
894 manage(Window w, XWindowAttributes *wa) {
895 Client *c, *t = NULL;
896 Status rettrans;
897 Window trans;
898 XWindowChanges wc;
899
900 if(!(c = calloc(1, sizeof(Client))))
901 eprint("fatal: could not calloc() %u bytes\n", sizeof(Client));
902 c->win = w;
903
904 /* geometry */
905 c->x = wa->x;
906 c->y = wa->y;
907 c->w = wa->width;
908 c->h = wa->height;
909 c->oldbw = wa->border_width;
910 if(c->w == sw && c->h == sh) {
911 c->x = sx;
912 c->y = sy;
913 c->bw = wa->border_width;
914 }
915 else {
916 if(c->x + c->w + 2 * c->bw > sx + sw)
917 c->x = sx + sw - c->w - 2 * c->bw;
918 if(c->y + c->h + 2 * c->bw > sy + sh)
919 c->y = sy + sh - c->h - 2 * c->bw;
920 c->x = MAX(c->x, sx);
921 c->y = MAX(c->y, by == 0 ? bh : sy);
922 c->bw = borderpx;
923 }
924
925 wc.border_width = c->bw;
926 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
927 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
928 configure(c); /* propagates border_width, if size doesn't change */
929 updatesizehints(c);
930 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
931 grabbuttons(c, False);
932 updatetitle(c);
933 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
934 for(t = clients; t && t->win != trans; t = t->next);
935 if(t)
936 c->tags = t->tags;
937 else
938 applyrules(c);
939 if(!c->isfloating)
940 c->isfloating = (rettrans == Success) || c->isfixed;
941 if(c->isfloating)
942 XRaiseWindow(dpy, c->win);
943 attach(c);
944 attachstack(c);
945 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
946 XMapWindow(dpy, c->win);
947 setclientstate(c, NormalState);
948 arrange();
949 }
950
951 void
952 mappingnotify(XEvent *e) {
953 XMappingEvent *ev = &e->xmapping;
954
955 XRefreshKeyboardMapping(ev);
956 if(ev->request == MappingKeyboard)
957 grabkeys();
958 }
959
960 void
961 maprequest(XEvent *e) {
962 static XWindowAttributes wa;
963 XMapRequestEvent *ev = &e->xmaprequest;
964
965 if(!XGetWindowAttributes(dpy, ev->window, &wa))
966 return;
967 if(wa.override_redirect)
968 return;
969 if(!getclient(ev->window))
970 manage(ev->window, &wa);
971 }
972
973 void
974 movemouse(Client *c) {
975 int x1, y1, ocx, ocy, di, nx, ny;
976 uint dui;
977 Window dummy;
978 XEvent ev;
979
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->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1013 togglefloating(NULL);
1014 }
1015 if(!lt->arrange || c->isfloating)
1016 resize(c, nx, ny, c->w, c->h, False);
1017 break;
1018 }
1019 }
1020 }
1021
1022 Client *
1023 nexttiled(Client *c) {
1024 for(; c && (c->isfloating || c->isbanned); c = c->next);
1025 return c;
1026 }
1027
1028 void
1029 propertynotify(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
1060 void
1061 quit(const Arg *arg) {
1062 readin = running = False;
1063 }
1064
1065 void
1066 resize(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 || c->ismoved) {
1120 c->ismoved = False;
1121 c->x = wc.x = x;
1122 c->y = wc.y = y;
1123 c->w = wc.width = w;
1124 c->h = wc.height = h;
1125 wc.border_width = c->bw;
1126 XConfigureWindow(dpy, c->win,
1127 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1128 configure(c);
1129 XSync(dpy, False);
1130 }
1131 }
1132
1133 void
1134 resizemouse(Client *c) {
1135 int ocx, ocy;
1136 int nw, nh;
1137 XEvent ev;
1138
1139 restack();
1140 ocx = c->x;
1141 ocy = c->y;
1142 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1143 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1144 return;
1145 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1146 for(;;) {
1147 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1148 switch(ev.type) {
1149 case ButtonRelease:
1150 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1151 c->w + c->bw - 1, c->h + c->bw - 1);
1152 XUngrabPointer(dpy, CurrentTime);
1153 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1154 return;
1155 case ConfigureRequest:
1156 case Expose:
1157 case MapRequest:
1158 handler[ev.type](&ev);
1159 break;
1160 case MotionNotify:
1161 XSync(dpy, False);
1162 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1163 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1164
1165 if(snap && nw >= wx && nw <= wx + ww
1166 && nh >= wy && nh <= wy + wh) {
1167 if(!c->isfloating && lt->arrange
1168 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1169 togglefloating(NULL);
1170 }
1171 if(!lt->arrange || c->isfloating)
1172 resize(c, c->x, c->y, nw, nh, True);
1173 break;
1174 }
1175 }
1176 }
1177
1178 void
1179 restack(void) {
1180 Client *c;
1181 XEvent ev;
1182 XWindowChanges wc;
1183
1184 drawbar();
1185 if(!sel)
1186 return;
1187 if(ismax || sel->isfloating || !lt->arrange)
1188 XRaiseWindow(dpy, sel->win);
1189 if(!ismax && lt->arrange) {
1190 wc.stack_mode = Below;
1191 wc.sibling = barwin;
1192 for(c = stack; c; c = c->snext)
1193 if(!c->isfloating && !c->isbanned) {
1194 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1195 wc.sibling = c->win;
1196 }
1197 }
1198 XSync(dpy, False);
1199 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1200 }
1201
1202 void
1203 run(void) {
1204 char *p;
1205 char sbuf[sizeof stext];
1206 fd_set rd;
1207 int r, xfd;
1208 uint len, offset;
1209 XEvent ev;
1210
1211 /* main event loop, also reads status text from stdin */
1212 XSync(dpy, False);
1213 xfd = ConnectionNumber(dpy);
1214 readin = True;
1215 offset = 0;
1216 len = sizeof stext - 1;
1217 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1218 while(running) {
1219 FD_ZERO(&rd);
1220 if(readin)
1221 FD_SET(STDIN_FILENO, &rd);
1222 FD_SET(xfd, &rd);
1223 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1224 if(errno == EINTR)
1225 continue;
1226 eprint("select failed\n");
1227 }
1228 if(FD_ISSET(STDIN_FILENO, &rd)) {
1229 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1230 case -1:
1231 strncpy(stext, strerror(errno), len);
1232 readin = False;
1233 break;
1234 case 0:
1235 strncpy(stext, "EOF", 4);
1236 readin = False;
1237 break;
1238 default:
1239 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1240 if(*p == '\n' || *p == '\0') {
1241 *p = '\0';
1242 strncpy(stext, sbuf, len);
1243 p += r - 1; /* p is sbuf + offset + r - 1 */
1244 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1245 offset = r;
1246 if(r)
1247 memmove(sbuf, p - r + 1, r);
1248 break;
1249 }
1250 break;
1251 }
1252 drawbar();
1253 }
1254 while(XPending(dpy)) {
1255 XNextEvent(dpy, &ev);
1256 if(handler[ev.type])
1257 (handler[ev.type])(&ev); /* call handler */
1258 }
1259 }
1260 }
1261
1262 void
1263 scan(void) {
1264 uint i, num;
1265 Window *wins, d1, d2;
1266 XWindowAttributes wa;
1267
1268 wins = NULL;
1269 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1270 for(i = 0; i < num; i++) {
1271 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1272 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1273 continue;
1274 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1275 manage(wins[i], &wa);
1276 }
1277 for(i = 0; i < num; i++) { /* now the transients */
1278 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1279 continue;
1280 if(XGetTransientForHint(dpy, wins[i], &d1)
1281 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1282 manage(wins[i], &wa);
1283 }
1284 }
1285 if(wins)
1286 XFree(wins);
1287 }
1288
1289 void
1290 setclientstate(Client *c, long state) {
1291 long data[] = {state, None};
1292
1293 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1294 PropModeReplace, (unsigned char *)data, 2);
1295 }
1296
1297 /* arg > 1.0 will set mfact absolutly */
1298 void
1299 setmfact(const Arg *arg) {
1300 float f;
1301
1302 if(!arg || !lt->arrange)
1303 return;
1304 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1305 if(f < 0.1 || f > 0.9)
1306 return;
1307 mfact = f;
1308 arrange();
1309 }
1310
1311 void
1312 setup(void) {
1313 uint i;
1314 int w;
1315 XSetWindowAttributes wa;
1316
1317 /* init screen */
1318 screen = DefaultScreen(dpy);
1319 root = RootWindow(dpy, screen);
1320 initfont(FONT);
1321 sx = 0;
1322 sy = 0;
1323 sw = DisplayWidth(dpy, screen);
1324 sh = DisplayHeight(dpy, screen);
1325 bh = dc.font.height + 2;
1326 lt = layouts;
1327 updategeom();
1328
1329 /* init atoms */
1330 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1331 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1332 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1333 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1334 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1335 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1336
1337 /* init cursors */
1338 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1339 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1340 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1341
1342 /* init appearance */
1343 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1344 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1345 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1346 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1347 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1348 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1349 initfont(FONT);
1350 dc.h = bh;
1351 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1352 dc.gc = XCreateGC(dpy, root, 0, 0);
1353 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1354 if(!dc.font.set)
1355 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1356
1357 /* init bar */
1358 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1359 w = TEXTW(layouts[i].symbol);
1360 blw = MAX(blw, w);
1361 }
1362
1363 wa.override_redirect = 1;
1364 wa.background_pixmap = ParentRelative;
1365 wa.event_mask = ButtonPressMask|ExposureMask;
1366
1367 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1368 CopyFromParent, DefaultVisual(dpy, screen),
1369 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1370 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1371 XMapRaised(dpy, barwin);
1372 strcpy(stext, "dwm-"VERSION);
1373 drawbar();
1374
1375 /* EWMH support per view */
1376 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1377 PropModeReplace, (unsigned char *) netatom, NetLast);
1378
1379 /* select for events */
1380 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1381 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1382 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1383 XSelectInput(dpy, root, wa.event_mask);
1384
1385
1386 /* grab keys */
1387 grabkeys();
1388 }
1389
1390 void
1391 spawn(const Arg *arg) {
1392 /* The double-fork construct avoids zombie processes and keeps the code
1393 * clean from stupid signal handlers. */
1394 if(fork() == 0) {
1395 if(fork() == 0) {
1396 if(dpy)
1397 close(ConnectionNumber(dpy));
1398 setsid();
1399 execvp(((char **)arg->v)[0], (char **)arg->v);
1400 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1401 perror(" failed");
1402 }
1403 exit(0);
1404 }
1405 wait(0);
1406 }
1407
1408 void
1409 tag(const Arg *arg) {
1410 if(sel && arg->ui & TAGMASK) {
1411 sel->tags = arg->ui & TAGMASK;
1412 arrange();
1413 }
1414 }
1415
1416 int
1417 textnw(const char *text, uint len) {
1418 XRectangle r;
1419
1420 if(dc.font.set) {
1421 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1422 return r.width;
1423 }
1424 return XTextWidth(dc.font.xfont, text, len);
1425 }
1426
1427 void
1428 tile(void) {
1429 int x, y, h, w, mw;
1430 uint i, n;
1431 Client *c;
1432
1433 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1434 if(n == 0)
1435 return;
1436
1437 /* master */
1438 c = nexttiled(clients);
1439 mw = mfact * ww;
1440 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1441
1442 if(--n == 0)
1443 return;
1444
1445 /* tile stack */
1446 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1447 y = wy;
1448 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1449 h = wh / n;
1450 if(h < bh)
1451 h = wh;
1452
1453 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1454 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1455 ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
1456 if(h != wh)
1457 y = c->y + c->h + 2 * c->bw;
1458 }
1459 }
1460
1461 void
1462 togglebar(const Arg *arg) {
1463 showbar = !showbar;
1464 updategeom();
1465 updatebar();
1466 arrange();
1467 }
1468
1469 void
1470 togglefloating(const Arg *arg) {
1471 if(!sel)
1472 return;
1473 sel->isfloating = !sel->isfloating || sel->isfixed;
1474 if(sel->isfloating)
1475 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1476 arrange();
1477 }
1478
1479 void
1480 togglelayout(const Arg *arg) {
1481 if(arg && arg->v)
1482 lt = (Layout *)arg->v;
1483 else if(++lt == &layouts[LENGTH(layouts)])
1484 lt = &layouts[0];
1485 if(sel)
1486 arrange();
1487 else
1488 drawbar();
1489 }
1490
1491 void
1492 togglemax(const Arg *arg) {
1493 ismax = !ismax;
1494 arrange();
1495 }
1496
1497 void
1498 toggletag(const Arg *arg) {
1499 if(sel && (sel->tags ^= (arg->ui & TAGMASK)))
1500 arrange();
1501 }
1502
1503 void
1504 toggleview(const Arg *arg) {
1505 if((tagset[seltags] ^= (arg->ui & TAGMASK)))
1506 arrange();
1507 }
1508
1509 void
1510 unmanage(Client *c) {
1511 XWindowChanges wc;
1512
1513 wc.border_width = c->oldbw;
1514 /* The server grab construct avoids race conditions. */
1515 XGrabServer(dpy);
1516 XSetErrorHandler(xerrordummy);
1517 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1518 detach(c);
1519 detachstack(c);
1520 if(sel == c)
1521 focus(NULL);
1522 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1523 setclientstate(c, WithdrawnState);
1524 free(c);
1525 XSync(dpy, False);
1526 XSetErrorHandler(xerror);
1527 XUngrabServer(dpy);
1528 arrange();
1529 }
1530
1531 void
1532 unmapnotify(XEvent *e) {
1533 Client *c;
1534 XUnmapEvent *ev = &e->xunmap;
1535
1536 if((c = getclient(ev->window)))
1537 unmanage(c);
1538 }
1539
1540 void
1541 updatebar(void) {
1542 if(dc.drawable != 0)
1543 XFreePixmap(dpy, dc.drawable);
1544 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1545 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1546 }
1547
1548 void
1549 updategeom(void) {
1550 #ifdef XINERAMA
1551 int i;
1552 XineramaScreenInfo *info = NULL;
1553
1554 /* window area geometry */
1555 if(XineramaIsActive(dpy)) {
1556 info = XineramaQueryScreens(dpy, &i);
1557 wx = info[0].x_org;
1558 wy = showbar && topbar ? info[0].y_org + bh : info[0].y_org;
1559 ww = info[0].width;
1560 wh = showbar ? info[0].height - bh : info[0].height;
1561 XFree(info);
1562 }
1563 else
1564 #endif
1565 {
1566 wx = sx;
1567 wy = showbar && topbar ? sy + bh : sy;
1568 ww = sw;
1569 wh = showbar ? sh - bh : sh;
1570 }
1571
1572 /* bar position */
1573 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1574 }
1575
1576 void
1577 updatesizehints(Client *c) {
1578 long msize;
1579 XSizeHints size;
1580
1581 XGetWMNormalHints(dpy, c->win, &size, &msize);
1582 if(size.flags & PBaseSize) {
1583 c->basew = size.base_width;
1584 c->baseh = size.base_height;
1585 }
1586 else if(size.flags & PMinSize) {
1587 c->basew = size.min_width;
1588 c->baseh = size.min_height;
1589 }
1590 else
1591 c->basew = c->baseh = 0;
1592 if(size.flags & PResizeInc) {
1593 c->incw = size.width_inc;
1594 c->inch = size.height_inc;
1595 }
1596 else
1597 c->incw = c->inch = 0;
1598 if(size.flags & PMaxSize) {
1599 c->maxw = size.max_width;
1600 c->maxh = size.max_height;
1601 }
1602 else
1603 c->maxw = c->maxh = 0;
1604 if(size.flags & PMinSize) {
1605 c->minw = size.min_width;
1606 c->minh = size.min_height;
1607 }
1608 else if(size.flags & PBaseSize) {
1609 c->minw = size.base_width;
1610 c->minh = size.base_height;
1611 }
1612 else
1613 c->minw = c->minh = 0;
1614 if(size.flags & PAspect) {
1615 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1616 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1617 }
1618 else
1619 c->maxa = c->mina = 0.0;
1620 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1621 && c->maxw == c->minw && c->maxh == c->minh);
1622 }
1623
1624 void
1625 updatetitle(Client *c) {
1626 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1627 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1628 }
1629
1630 void
1631 updatewmhints(Client *c) {
1632 XWMHints *wmh;
1633
1634 if((wmh = XGetWMHints(dpy, c->win))) {
1635 if(c == sel)
1636 sel->isurgent = False;
1637 else
1638 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1639 XFree(wmh);
1640 }
1641 }
1642
1643 void
1644 view(const Arg *arg) {
1645 seltags ^= 1; /* toggle sel tagset */
1646 if(arg && (arg->ui & TAGMASK))
1647 tagset[seltags] = arg->i & TAGMASK;
1648 arrange();
1649 }
1650
1651 /* There's no way to check accesses to destroyed windows, thus those cases are
1652 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1653 * default error handler, which may call exit. */
1654 int
1655 xerror(Display *dpy, XErrorEvent *ee) {
1656 if(ee->error_code == BadWindow
1657 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1658 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1659 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1660 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1661 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1662 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1663 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1664 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1665 return 0;
1666 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1667 ee->request_code, ee->error_code);
1668 return xerrorxlib(dpy, ee); /* may call exit */
1669 }
1670
1671 int
1672 xerrordummy(Display *dpy, XErrorEvent *ee) {
1673 return 0;
1674 }
1675
1676 /* Startup Error handler to check if another window manager
1677 * is already running. */
1678 int
1679 xerrorstart(Display *dpy, XErrorEvent *ee) {
1680 otherwm = True;
1681 return -1;
1682 }
1683
1684 void
1685 zoom(const Arg *arg) {
1686 Client *c = sel;
1687
1688 if(ismax || !lt->arrange || (sel && sel->isfloating))
1689 return;
1690 if(c == nexttiled(clients))
1691 if(!c || !(c = nexttiled(c->next)))
1692 return;
1693 detach(c);
1694 attach(c);
1695 focus(c);
1696 arrange();
1697 }
1698
1699 int
1700 main(int argc, char *argv[]) {
1701 if(argc == 2 && !strcmp("-v", argv[1]))
1702 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1703 else if(argc != 1)
1704 eprint("usage: dwm [-v]\n");
1705
1706 setlocale(LC_CTYPE, "");
1707 if(!(dpy = XOpenDisplay(0)))
1708 eprint("dwm: cannot open display\n");
1709
1710 checkotherwm();
1711 setup();
1712 scan();
1713 run();
1714 cleanup();
1715
1716 XCloseDisplay(dpy);
1717 return 0;
1718 }