Xinqi Bao's Git

projects / dwm.git / blob


05fbf58479a373583f26c6c2eeeb955b64e88c1e
[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 int minax, maxax, minay, maxay;
72 int bw, oldbw;
73 Bool isbanned, isfixed, isfloating, ismoved, isurgent;
74 uint tags;
75 Client *next;
76 Client *prev;
77 Client *snext;
78 Window win;
79 };
80
81 typedef struct {
82 int x, y, w, h;
83 ulong norm[ColLast];
84 ulong sel[ColLast];
85 Drawable drawable;
86 GC gc;
87 struct {
88 int ascent;
89 int descent;
90 int height;
91 XFontSet set;
92 XFontStruct *xfont;
93 } font;
94 } DC; /* draw context */
95
96 typedef struct {
97 uint mod;
98 KeySym keysym;
99 void (*func)(const void *arg);
100 const void *arg;
101 } Key;
102
103 typedef struct {
104 const char *symbol;
105 void (*arrange)(void);
106 } Layout;
107
108 typedef struct {
109 const char *class;
110 const char *instance;
111 const char *title;
112 uint tags;
113 Bool isfloating;
114 } Rule;
115
116 /* function declarations */
117 void applyrules(Client *c);
118 void arrange(void);
119 void attach(Client *c);
120 void attachstack(Client *c);
121 void buttonpress(XEvent *e);
122 void checkotherwm(void);
123 void cleanup(void);
124 void configure(Client *c);
125 void configurenotify(XEvent *e);
126 void configurerequest(XEvent *e);
127 void destroynotify(XEvent *e);
128 void detach(Client *c);
129 void detachstack(Client *c);
130 void drawbar(void);
131 void drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]);
132 void drawtext(const char *text, ulong col[ColLast], Bool invert);
133 void enternotify(XEvent *e);
134 void eprint(const char *errstr, ...);
135 void expose(XEvent *e);
136 void focus(Client *c);
137 void focusin(XEvent *e);
138 void focusnext(const void *arg);
139 void focusprev(const void *arg);
140 Client *getclient(Window w);
141 ulong getcolor(const char *colstr);
142 long getstate(Window w);
143 Bool gettextprop(Window w, Atom atom, char *text, uint size);
144 void grabbuttons(Client *c, Bool focused);
145 void grabkeys(void);
146 void initfont(const char *fontstr);
147 Bool isoccupied(uint t);
148 Bool isprotodel(Client *c);
149 Bool isurgent(uint t);
150 void keypress(XEvent *e);
151 void killclient(const void *arg);
152 void manage(Window w, XWindowAttributes *wa);
153 void mappingnotify(XEvent *e);
154 void maprequest(XEvent *e);
155 void movemouse(Client *c);
156 Client *nexttiled(Client *c);
157 void propertynotify(XEvent *e);
158 void quit(const void *arg);
159 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
160 void resizemouse(Client *c);
161 void restack(void);
162 void run(void);
163 void scan(void);
164 void setclientstate(Client *c, long state);
165 void setmfact(const void *arg);
166 void setup(void);
167 void spawn(const void *arg);
168 void tag(const void *arg);
169 uint textnw(const char *text, uint len);
170 void tile(void);
171 void togglebar(const void *arg);
172 void togglefloating(const void *arg);
173 void togglelayout(const void *arg);
174 void togglemax(const void *arg);
175 void toggletag(const void *arg);
176 void toggleview(const void *arg);
177 void unmanage(Client *c);
178 void unmapnotify(XEvent *e);
179 void updatebar(void);
180 void updategeom(void);
181 void updatesizehints(Client *c);
182 void updatetitle(Client *c);
183 void updatewmhints(Client *c);
184 void view(const void *arg);
185 int xerror(Display *dpy, XErrorEvent *ee);
186 int xerrordummy(Display *dpy, XErrorEvent *ee);
187 int xerrorstart(Display *dpy, XErrorEvent *ee);
188 void zoom(const void *arg);
189
190 /* variables */
191 char stext[256];
192 int screen, sx, sy, sw, sh;
193 int by, bh, blw, wx, wy, ww, wh;
194 uint seltags = 0;
195 int (*xerrorxlib)(Display *, XErrorEvent *);
196 uint numlockmask = 0;
197 void (*handler[LASTEvent]) (XEvent *) = {
198 [ButtonPress] = buttonpress,
199 [ConfigureRequest] = configurerequest,
200 [ConfigureNotify] = configurenotify,
201 [DestroyNotify] = destroynotify,
202 [EnterNotify] = enternotify,
203 [Expose] = expose,
204 [FocusIn] = focusin,
205 [KeyPress] = keypress,
206 [MappingNotify] = mappingnotify,
207 [MapRequest] = maprequest,
208 [PropertyNotify] = propertynotify,
209 [UnmapNotify] = unmapnotify
210 };
211 Atom wmatom[WMLast], netatom[NetLast];
212 Bool ismax = False;
213 Bool otherwm, readin;
214 Bool running = True;
215 uint tagset[] = {1, 1}; /* after start, first tag is selected */
216 Client *clients = NULL;
217 Client *sel = NULL;
218 Client *stack = NULL;
219 Cursor cursor[CurLast];
220 Display *dpy;
221 DC dc = {0};
222 Layout layouts[];
223 Layout *lt = layouts;
224 Window root, barwin;
225
226 /* configuration, allows nested code to access above variables */
227 #include "config.h"
228
229 /* compile-time check if all tags fit into an uint bit array. */
230 struct NumTags { char limitexceeded[sizeof(uint) * 8 < LENGTH(tags) ? -1 : 1]; };
231
232 /* function implementations */
233 void
234 applyrules(Client *c) {
235 uint i;
236 Rule *r;
237 XClassHint ch = { 0 };
238
239 /* rule matching */
240 XGetClassHint(dpy, c->win, &ch);
241 for(i = 0; i < LENGTH(rules); i++) {
242 r = &rules[i];
243 if((!r->title || strstr(c->name, r->title))
244 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
245 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
246 c->isfloating = r->isfloating;
247 c->tags |= r->tags & TAGMASK;
248 }
249 }
250 if(ch.res_class)
251 XFree(ch.res_class);
252 if(ch.res_name)
253 XFree(ch.res_name);
254 if(!c->tags)
255 c->tags = tagset[seltags];
256 }
257
258 void
259 arrange(void) {
260 Client *c;
261
262 for(c = clients; c; c = c->next)
263 if(c->tags & tagset[seltags]) { /* is visible */
264 if(ismax && !c->isfixed) {
265 XMoveResizeWindow(dpy, c->win, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
266 c->ismoved = True;
267 }
268 else if(!lt->arrange || c->isfloating)
269 resize(c, c->x, c->y, c->w, c->h, True);
270 c->isbanned = False;
271 }
272 else if(!c->isbanned) {
273 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
274 c->isbanned = c->ismoved = True;
275 }
276
277 focus(NULL);
278 if(lt->arrange && !ismax)
279 lt->arrange();
280 restack();
281 }
282
283 void
284 attach(Client *c) {
285 if(clients)
286 clients->prev = c;
287 c->next = clients;
288 clients = c;
289 }
290
291 void
292 attachstack(Client *c) {
293 c->snext = stack;
294 stack = c;
295 }
296
297 void
298 buttonpress(XEvent *e) {
299 uint i, x, mask;
300 Client *c;
301 XButtonPressedEvent *ev = &e->xbutton;
302
303 if(ev->window == barwin) {
304 x = 0;
305 for(i = 0; i < LENGTH(tags); i++) {
306 x += TEXTW(tags[i]);
307 if(ev->x < x) {
308 mask = 1 << i;
309 if(ev->button == Button1) {
310 if(ev->state & MODKEY)
311 tag(&mask);
312 else
313 view(&mask);
314 }
315 else if(ev->button == Button3) {
316 if(ev->state & MODKEY)
317 toggletag(&mask);
318 else
319 toggleview(&mask);
320 }
321 return;
322 }
323 }
324 if(ev->x < x + blw) {
325 if(ev->button == Button1)
326 togglelayout(NULL);
327 else if(ev->button == Button3)
328 togglemax(NULL);
329 }
330 }
331 else if((c = getclient(ev->window))) {
332 focus(c);
333 if(CLEANMASK(ev->state) != MODKEY || (ismax && !c->isfixed))
334 return;
335 if(ev->button == Button1)
336 movemouse(c);
337 else if(ev->button == Button2)
338 togglefloating(NULL);
339 else if(ev->button == Button3 && !c->isfixed)
340 resizemouse(c);
341 }
342 }
343
344 void
345 checkotherwm(void) {
346 otherwm = False;
347 XSetErrorHandler(xerrorstart);
348
349 /* this causes an error if some other window manager is running */
350 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
351 XSync(dpy, False);
352 if(otherwm)
353 eprint("dwm: another window manager is already running\n");
354 XSetErrorHandler(NULL);
355 xerrorxlib = XSetErrorHandler(xerror);
356 XSync(dpy, False);
357 }
358
359 void
360 cleanup(void) {
361 close(STDIN_FILENO);
362 view((uint[]){~0});
363 while(stack)
364 unmanage(stack);
365 if(dc.font.set)
366 XFreeFontSet(dpy, dc.font.set);
367 else
368 XFreeFont(dpy, dc.font.xfont);
369 XUngrabKey(dpy, AnyKey, AnyModifier, root);
370 XFreePixmap(dpy, dc.drawable);
371 XFreeGC(dpy, dc.gc);
372 XFreeCursor(dpy, cursor[CurNormal]);
373 XFreeCursor(dpy, cursor[CurResize]);
374 XFreeCursor(dpy, cursor[CurMove]);
375 XDestroyWindow(dpy, barwin);
376 XSync(dpy, False);
377 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
378 }
379
380 void
381 configure(Client *c) {
382 XConfigureEvent ce;
383
384 ce.type = ConfigureNotify;
385 ce.display = dpy;
386 ce.event = c->win;
387 ce.window = c->win;
388 ce.x = c->x;
389 ce.y = c->y;
390 ce.width = c->w;
391 ce.height = c->h;
392 ce.border_width = c->bw;
393 ce.above = None;
394 ce.override_redirect = False;
395 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
396 }
397
398 void
399 configurenotify(XEvent *e) {
400 XConfigureEvent *ev = &e->xconfigure;
401
402 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
403 sw = ev->width;
404 sh = ev->height;
405 updategeom();
406 updatebar();
407 arrange();
408 }
409 }
410
411 void
412 configurerequest(XEvent *e) {
413 Client *c;
414 XConfigureRequestEvent *ev = &e->xconfigurerequest;
415 XWindowChanges wc;
416
417 if((c = getclient(ev->window))) {
418 if(ev->value_mask & CWBorderWidth)
419 c->bw = ev->border_width;
420 if(ismax && !c->isbanned && !c->isfixed)
421 XMoveResizeWindow(dpy, c->win, wx, wy, ww - 2 * c->bw, wh + 2 * c->bw);
422 else if(c->isfloating || !lt->arrange) {
423 if(ev->value_mask & CWX)
424 c->x = sx + ev->x;
425 if(ev->value_mask & CWY)
426 c->y = sy + ev->y;
427 if(ev->value_mask & CWWidth)
428 c->w = ev->width;
429 if(ev->value_mask & CWHeight)
430 c->h = ev->height;
431 if((c->x - sx + c->w) > sw && c->isfloating)
432 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
433 if((c->y - sy + c->h) > sh && c->isfloating)
434 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
435 if((ev->value_mask & (CWX|CWY))
436 && !(ev->value_mask & (CWWidth|CWHeight)))
437 configure(c);
438 if(!c->isbanned)
439 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
440 }
441 else
442 configure(c);
443 }
444 else {
445 wc.x = ev->x;
446 wc.y = ev->y;
447 wc.width = ev->width;
448 wc.height = ev->height;
449 wc.border_width = ev->border_width;
450 wc.sibling = ev->above;
451 wc.stack_mode = ev->detail;
452 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
453 }
454 XSync(dpy, False);
455 }
456
457 void
458 destroynotify(XEvent *e) {
459 Client *c;
460 XDestroyWindowEvent *ev = &e->xdestroywindow;
461
462 if((c = getclient(ev->window)))
463 unmanage(c);
464 }
465
466 void
467 detach(Client *c) {
468 if(c->prev)
469 c->prev->next = c->next;
470 if(c->next)
471 c->next->prev = c->prev;
472 if(c == clients)
473 clients = c->next;
474 c->next = c->prev = NULL;
475 }
476
477 void
478 detachstack(Client *c) {
479 Client **tc;
480
481 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
482 *tc = c->snext;
483 }
484
485 void
486 drawbar(void) {
487 int i, x;
488 Client *c;
489
490 dc.x = 0;
491 for(c = stack; c && c->isbanned; c = c->snext);
492 for(i = 0; i < LENGTH(tags); i++) {
493 dc.w = TEXTW(tags[i]);
494 if(tagset[seltags] & 1 << i) {
495 drawtext(tags[i], dc.sel, isurgent(i));
496 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.sel);
497 }
498 else {
499 drawtext(tags[i], dc.norm, isurgent(i));
500 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.norm);
501 }
502 dc.x += dc.w;
503 }
504 if(blw > 0) {
505 dc.w = blw;
506 drawtext(lt->symbol, dc.norm, ismax);
507 x = dc.x + dc.w;
508 }
509 else
510 x = dc.x;
511 dc.w = TEXTW(stext);
512 dc.x = ww - dc.w;
513 if(dc.x < x) {
514 dc.x = x;
515 dc.w = ww - x;
516 }
517 drawtext(stext, dc.norm, False);
518 if((dc.w = dc.x - x) > bh) {
519 dc.x = x;
520 if(c) {
521 drawtext(c->name, dc.sel, False);
522 drawsquare(c->isfixed, c->isfloating, False, dc.sel);
523 }
524 else
525 drawtext(NULL, dc.norm, False);
526 }
527 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
528 XSync(dpy, False);
529 }
530
531 void
532 drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]) {
533 int x;
534 XGCValues gcv;
535 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
536
537 gcv.foreground = col[invert ? ColBG : ColFG];
538 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
539 x = (dc.font.ascent + dc.font.descent + 2) / 4;
540 r.x = dc.x + 1;
541 r.y = dc.y + 1;
542 if(filled) {
543 r.width = r.height = x + 1;
544 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
545 }
546 else if(empty) {
547 r.width = r.height = x;
548 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
549 }
550 }
551
552 void
553 drawtext(const char *text, ulong col[ColLast], Bool invert) {
554 int i, x, y, h, len, olen;
555 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
556 char buf[256];
557
558 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
559 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
560 if(!text)
561 return;
562 olen = strlen(text);
563 len = MIN(olen, sizeof buf);
564 memcpy(buf, text, len);
565 h = dc.font.ascent + dc.font.descent;
566 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
567 x = dc.x + (h / 2);
568 /* shorten text if necessary */
569 for(; len && (i = textnw(buf, len)) > dc.w - h; len--);
570 if(!len)
571 return;
572 if(len < olen)
573 for(i = len; i >= MAX(0, len - 3); buf[i--] = '.');
574 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
575 if(dc.font.set)
576 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
577 else
578 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
579 }
580
581 void
582 enternotify(XEvent *e) {
583 Client *c;
584 XCrossingEvent *ev = &e->xcrossing;
585
586 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
587 return;
588 if((c = getclient(ev->window)))
589 focus(c);
590 else
591 focus(NULL);
592 }
593
594 void
595 eprint(const char *errstr, ...) {
596 va_list ap;
597
598 va_start(ap, errstr);
599 vfprintf(stderr, errstr, ap);
600 va_end(ap);
601 exit(EXIT_FAILURE);
602 }
603
604 void
605 expose(XEvent *e) {
606 XExposeEvent *ev = &e->xexpose;
607
608 if(ev->count == 0 && (ev->window == barwin))
609 drawbar();
610 }
611
612 void
613 focus(Client *c) {
614 if(!c || c->isbanned)
615 for(c = stack; c && c->isbanned; c = c->snext);
616 if(sel && sel != c) {
617 grabbuttons(sel, False);
618 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
619 }
620 if(c) {
621 detachstack(c);
622 attachstack(c);
623 grabbuttons(c, True);
624 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
625 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
626 }
627 else
628 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
629 sel = c;
630 drawbar();
631 }
632
633 void
634 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
635 XFocusChangeEvent *ev = &e->xfocus;
636
637 if(sel && ev->window != sel->win)
638 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
639 }
640
641 void
642 focusnext(const void *arg) {
643 Client *c;
644
645 if(!sel)
646 return;
647 for(c = sel->next; c && c->isbanned; c = c->next);
648 if(!c)
649 for(c = clients; c && c->isbanned; c = c->next);
650 if(c) {
651 focus(c);
652 restack();
653 }
654 }
655
656 void
657 focusprev(const void *arg) {
658 Client *c;
659
660 if(!sel)
661 return;
662 for(c = sel->prev; c && c->isbanned; c = c->prev);
663 if(!c) {
664 for(c = clients; c && c->next; c = c->next);
665 for(; c && c->isbanned; c = c->prev);
666 }
667 if(c) {
668 focus(c);
669 restack();
670 }
671 }
672
673 Client *
674 getclient(Window w) {
675 Client *c;
676
677 for(c = clients; c && c->win != w; c = c->next);
678 return c;
679 }
680
681 ulong
682 getcolor(const char *colstr) {
683 Colormap cmap = DefaultColormap(dpy, screen);
684 XColor color;
685
686 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
687 eprint("error, cannot allocate color '%s'\n", colstr);
688 return color.pixel;
689 }
690
691 long
692 getstate(Window w) {
693 int format, status;
694 long result = -1;
695 unsigned char *p = NULL;
696 ulong n, extra;
697 Atom real;
698
699 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
700 &real, &format, &n, &extra, (unsigned char **)&p);
701 if(status != Success)
702 return -1;
703 if(n != 0)
704 result = *p;
705 XFree(p);
706 return result;
707 }
708
709 Bool
710 gettextprop(Window w, Atom atom, char *text, uint size) {
711 char **list = NULL;
712 int n;
713 XTextProperty name;
714
715 if(!text || size == 0)
716 return False;
717 text[0] = '\0';
718 XGetTextProperty(dpy, w, &name, atom);
719 if(!name.nitems)
720 return False;
721 if(name.encoding == XA_STRING)
722 strncpy(text, (char *)name.value, size - 1);
723 else {
724 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
725 && n > 0 && *list) {
726 strncpy(text, *list, size - 1);
727 XFreeStringList(list);
728 }
729 }
730 text[size - 1] = '\0';
731 XFree(name.value);
732 return True;
733 }
734
735 void
736 grabbuttons(Client *c, Bool focused) {
737 int i, j;
738 uint buttons[] = { Button1, Button2, Button3 };
739 uint modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask,
740 MODKEY|numlockmask|LockMask} ;
741
742 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
743 if(focused)
744 for(i = 0; i < LENGTH(buttons); i++)
745 for(j = 0; j < LENGTH(modifiers); j++)
746 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
747 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
748 else
749 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
750 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
751 }
752
753 void
754 grabkeys(void) {
755 uint i, j;
756 KeyCode code;
757 XModifierKeymap *modmap;
758
759 /* init modifier map */
760 modmap = XGetModifierMapping(dpy);
761 for(i = 0; i < 8; i++)
762 for(j = 0; j < modmap->max_keypermod; j++) {
763 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
764 numlockmask = (1 << i);
765 }
766 XFreeModifiermap(modmap);
767
768 XUngrabKey(dpy, AnyKey, AnyModifier, root);
769 for(i = 0; i < LENGTH(keys); i++) {
770 code = XKeysymToKeycode(dpy, keys[i].keysym);
771 XGrabKey(dpy, code, keys[i].mod, root, True,
772 GrabModeAsync, GrabModeAsync);
773 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
774 GrabModeAsync, GrabModeAsync);
775 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
776 GrabModeAsync, GrabModeAsync);
777 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
778 GrabModeAsync, GrabModeAsync);
779 }
780 }
781
782 void
783 initfont(const char *fontstr) {
784 char *def, **missing;
785 int i, n;
786
787 missing = NULL;
788 if(dc.font.set)
789 XFreeFontSet(dpy, dc.font.set);
790 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
791 if(missing) {
792 while(n--)
793 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
794 XFreeStringList(missing);
795 }
796 if(dc.font.set) {
797 XFontSetExtents *font_extents;
798 XFontStruct **xfonts;
799 char **font_names;
800 dc.font.ascent = dc.font.descent = 0;
801 font_extents = XExtentsOfFontSet(dc.font.set);
802 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
803 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
804 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
805 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
806 xfonts++;
807 }
808 }
809 else {
810 if(dc.font.xfont)
811 XFreeFont(dpy, dc.font.xfont);
812 dc.font.xfont = NULL;
813 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
814 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
815 eprint("error, cannot load font: '%s'\n", fontstr);
816 dc.font.ascent = dc.font.xfont->ascent;
817 dc.font.descent = dc.font.xfont->descent;
818 }
819 dc.font.height = dc.font.ascent + dc.font.descent;
820 }
821
822 Bool
823 isoccupied(uint t) {
824 Client *c;
825
826 for(c = clients; c; c = c->next)
827 if(c->tags & 1 << t)
828 return True;
829 return False;
830 }
831
832 Bool
833 isprotodel(Client *c) {
834 int i, n;
835 Atom *protocols;
836 Bool ret = False;
837
838 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
839 for(i = 0; !ret && i < n; i++)
840 if(protocols[i] == wmatom[WMDelete])
841 ret = True;
842 XFree(protocols);
843 }
844 return ret;
845 }
846
847 Bool
848 isurgent(uint t) {
849 Client *c;
850
851 for(c = clients; c; c = c->next)
852 if(c->isurgent && c->tags & 1 << t)
853 return True;
854 return False;
855 }
856
857 void
858 keypress(XEvent *e) {
859 uint i;
860 KeySym keysym;
861 XKeyEvent *ev;
862
863 ev = &e->xkey;
864 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
865 for(i = 0; i < LENGTH(keys); i++)
866 if(keysym == keys[i].keysym
867 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
868 && keys[i].func)
869 keys[i].func(keys[i].arg);
870 }
871
872 void
873 killclient(const void *arg) {
874 XEvent ev;
875
876 if(!sel)
877 return;
878 if(isprotodel(sel)) {
879 ev.type = ClientMessage;
880 ev.xclient.window = sel->win;
881 ev.xclient.message_type = wmatom[WMProtocols];
882 ev.xclient.format = 32;
883 ev.xclient.data.l[0] = wmatom[WMDelete];
884 ev.xclient.data.l[1] = CurrentTime;
885 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
886 }
887 else
888 XKillClient(dpy, sel->win);
889 }
890
891 void
892 manage(Window w, XWindowAttributes *wa) {
893 Client *c, *t = NULL;
894 Status rettrans;
895 Window trans;
896 XWindowChanges wc;
897
898 if(!(c = calloc(1, sizeof(Client))))
899 eprint("fatal: could not calloc() %u bytes\n", sizeof(Client));
900 c->win = w;
901
902 /* geometry */
903 c->x = wa->x;
904 c->y = wa->y;
905 c->w = wa->width;
906 c->h = wa->height;
907 c->oldbw = wa->border_width;
908 if(c->w == sw && c->h == sh) {
909 c->x = sx;
910 c->y = sy;
911 c->bw = wa->border_width;
912 }
913 else {
914 if(c->x + c->w + 2 * c->bw > sx + sw)
915 c->x = sx + sw - c->w - 2 * c->bw;
916 if(c->y + c->h + 2 * c->bw > sy + sh)
917 c->y = sy + sh - c->h - 2 * c->bw;
918 c->x = MAX(c->x, sx);
919 c->y = MAX(c->y, by == 0 ? bh : sy);
920 c->bw = borderpx;
921 }
922
923 wc.border_width = c->bw;
924 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
925 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
926 configure(c); /* propagates border_width, if size doesn't change */
927 updatesizehints(c);
928 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
929 grabbuttons(c, False);
930 updatetitle(c);
931 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
932 for(t = clients; t && t->win != trans; t = t->next);
933 if(t)
934 c->tags = t->tags;
935 else
936 applyrules(c);
937 if(!c->isfloating)
938 c->isfloating = (rettrans == Success) || c->isfixed;
939 if(c->isfloating)
940 XRaiseWindow(dpy, c->win);
941 attach(c);
942 attachstack(c);
943 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
944 XMapWindow(dpy, c->win);
945 setclientstate(c, NormalState);
946 arrange();
947 }
948
949 void
950 mappingnotify(XEvent *e) {
951 XMappingEvent *ev = &e->xmapping;
952
953 XRefreshKeyboardMapping(ev);
954 if(ev->request == MappingKeyboard)
955 grabkeys();
956 }
957
958 void
959 maprequest(XEvent *e) {
960 static XWindowAttributes wa;
961 XMapRequestEvent *ev = &e->xmaprequest;
962
963 if(!XGetWindowAttributes(dpy, ev->window, &wa))
964 return;
965 if(wa.override_redirect)
966 return;
967 if(!getclient(ev->window))
968 manage(ev->window, &wa);
969 }
970
971 void
972 movemouse(Client *c) {
973 int x1, y1, ocx, ocy, di, nx, ny;
974 uint dui;
975 Window dummy;
976 XEvent ev;
977
978 restack();
979 ocx = nx = c->x;
980 ocy = ny = c->y;
981 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
982 None, cursor[CurMove], CurrentTime) != GrabSuccess)
983 return;
984 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
985 for(;;) {
986 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
987 switch (ev.type) {
988 case ButtonRelease:
989 XUngrabPointer(dpy, CurrentTime);
990 return;
991 case ConfigureRequest:
992 case Expose:
993 case MapRequest:
994 handler[ev.type](&ev);
995 break;
996 case MotionNotify:
997 XSync(dpy, False);
998 nx = ocx + (ev.xmotion.x - x1);
999 ny = ocy + (ev.xmotion.y - y1);
1000 if(snap && nx >= wx && nx <= wx + ww
1001 && ny >= wy && ny <= wy + wh) {
1002 if(abs(wx - nx) < snap)
1003 nx = wx;
1004 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
1005 nx = wx + ww - c->w - 2 * c->bw;
1006 if(abs(wy - ny) < snap)
1007 ny = wy;
1008 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
1009 ny = wy + wh - c->h - 2 * c->bw;
1010 if(!c->isfloating && lt->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1011 togglefloating(NULL);
1012 }
1013 if(!lt->arrange || c->isfloating)
1014 resize(c, nx, ny, c->w, c->h, False);
1015 break;
1016 }
1017 }
1018 }
1019
1020 Client *
1021 nexttiled(Client *c) {
1022 for(; c && (c->isfloating || c->isbanned); c = c->next);
1023 return c;
1024 }
1025
1026 void
1027 propertynotify(XEvent *e) {
1028 Client *c;
1029 Window trans;
1030 XPropertyEvent *ev = &e->xproperty;
1031
1032 if(ev->state == PropertyDelete)
1033 return; /* ignore */
1034 if((c = getclient(ev->window))) {
1035 switch (ev->atom) {
1036 default: break;
1037 case XA_WM_TRANSIENT_FOR:
1038 XGetTransientForHint(dpy, c->win, &trans);
1039 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1040 arrange();
1041 break;
1042 case XA_WM_NORMAL_HINTS:
1043 updatesizehints(c);
1044 break;
1045 case XA_WM_HINTS:
1046 updatewmhints(c);
1047 drawbar();
1048 break;
1049 }
1050 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1051 updatetitle(c);
1052 if(c == sel)
1053 drawbar();
1054 }
1055 }
1056 }
1057
1058 void
1059 quit(const void *arg) {
1060 readin = running = False;
1061 }
1062
1063 void
1064 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1065 XWindowChanges wc;
1066
1067 if(sizehints) {
1068 /* set minimum possible */
1069 w = MAX(1, w);
1070 h = MAX(1, h);
1071
1072 /* temporarily remove base dimensions */
1073 w -= c->basew;
1074 h -= c->baseh;
1075
1076 /* adjust for aspect limits */
1077 if(c->minax != c->maxax && c->minay != c->maxay
1078 && c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0) {
1079 if(w * c->maxay > h * c->maxax)
1080 w = h * c->maxax / c->maxay;
1081 else if(w * c->minay < h * c->minax)
1082 h = w * c->minay / c->minax;
1083 }
1084
1085 /* adjust for increment value */
1086 if(c->incw)
1087 w -= w % c->incw;
1088 if(c->inch)
1089 h -= h % c->inch;
1090
1091 /* restore base dimensions */
1092 w += c->basew;
1093 h += c->baseh;
1094
1095 w = MAX(w, c->minw);
1096 h = MAX(h, c->minh);
1097
1098 if (c->maxw)
1099 w = MIN(w, c->maxw);
1100
1101 if (c->maxh)
1102 h = MIN(h, c->maxh);
1103 }
1104 if(w <= 0 || h <= 0)
1105 return;
1106 if(x > sx + sw)
1107 x = sw - w - 2 * c->bw;
1108 if(y > sy + sh)
1109 y = sh - h - 2 * c->bw;
1110 if(x + w + 2 * c->bw < sx)
1111 x = sx;
1112 if(y + h + 2 * c->bw < sy)
1113 y = sy;
1114 if(h < bh)
1115 h = bh;
1116 if(w < bh)
1117 w = bh;
1118 if(c->x != x || c->y != y || c->w != w || c->h != h || c->ismoved) {
1119 c->ismoved = False;
1120 c->x = wc.x = x;
1121 c->y = wc.y = y;
1122 c->w = wc.width = w;
1123 c->h = wc.height = h;
1124 wc.border_width = c->bw;
1125 XConfigureWindow(dpy, c->win,
1126 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1127 configure(c);
1128 XSync(dpy, False);
1129 }
1130 }
1131
1132 void
1133 resizemouse(Client *c) {
1134 int ocx, ocy;
1135 int nw, nh;
1136 XEvent ev;
1137
1138 restack();
1139 ocx = c->x;
1140 ocy = c->y;
1141 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1142 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1143 return;
1144 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1145 for(;;) {
1146 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1147 switch(ev.type) {
1148 case ButtonRelease:
1149 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1150 c->w + c->bw - 1, c->h + c->bw - 1);
1151 XUngrabPointer(dpy, CurrentTime);
1152 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1153 return;
1154 case ConfigureRequest:
1155 case Expose:
1156 case MapRequest:
1157 handler[ev.type](&ev);
1158 break;
1159 case MotionNotify:
1160 XSync(dpy, False);
1161 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1162 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1163
1164 if(snap && nw >= wx && nw <= wx + ww
1165 && nh >= wy && nh <= wy + wh) {
1166 if(!c->isfloating && lt->arrange
1167 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1168 togglefloating(NULL);
1169 }
1170 if(!lt->arrange || c->isfloating)
1171 resize(c, c->x, c->y, nw, nh, True);
1172 break;
1173 }
1174 }
1175 }
1176
1177 void
1178 restack(void) {
1179 Client *c;
1180 XEvent ev;
1181 XWindowChanges wc;
1182
1183 drawbar();
1184 if(!sel)
1185 return;
1186 if(ismax || sel->isfloating || !lt->arrange)
1187 XRaiseWindow(dpy, sel->win);
1188 if(!ismax && lt->arrange) {
1189 wc.stack_mode = Below;
1190 wc.sibling = barwin;
1191 for(c = stack; c; c = c->snext)
1192 if(!c->isfloating && !c->isbanned) {
1193 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1194 wc.sibling = c->win;
1195 }
1196 }
1197 XSync(dpy, False);
1198 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1199 }
1200
1201 void
1202 run(void) {
1203 char *p;
1204 char sbuf[sizeof stext];
1205 fd_set rd;
1206 int r, xfd;
1207 uint len, offset;
1208 XEvent ev;
1209
1210 /* main event loop, also reads status text from stdin */
1211 XSync(dpy, False);
1212 xfd = ConnectionNumber(dpy);
1213 readin = True;
1214 offset = 0;
1215 len = sizeof stext - 1;
1216 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1217 while(running) {
1218 FD_ZERO(&rd);
1219 if(readin)
1220 FD_SET(STDIN_FILENO, &rd);
1221 FD_SET(xfd, &rd);
1222 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1223 if(errno == EINTR)
1224 continue;
1225 eprint("select failed\n");
1226 }
1227 if(FD_ISSET(STDIN_FILENO, &rd)) {
1228 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1229 case -1:
1230 strncpy(stext, strerror(errno), len);
1231 readin = False;
1232 break;
1233 case 0:
1234 strncpy(stext, "EOF", 4);
1235 readin = False;
1236 break;
1237 default:
1238 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1239 if(*p == '\n' || *p == '\0') {
1240 *p = '\0';
1241 strncpy(stext, sbuf, len);
1242 p += r - 1; /* p is sbuf + offset + r - 1 */
1243 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1244 offset = r;
1245 if(r)
1246 memmove(sbuf, p - r + 1, r);
1247 break;
1248 }
1249 break;
1250 }
1251 drawbar();
1252 }
1253 while(XPending(dpy)) {
1254 XNextEvent(dpy, &ev);
1255 if(handler[ev.type])
1256 (handler[ev.type])(&ev); /* call handler */
1257 }
1258 }
1259 }
1260
1261 void
1262 scan(void) {
1263 uint i, num;
1264 Window *wins, d1, d2;
1265 XWindowAttributes wa;
1266
1267 wins = NULL;
1268 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1269 for(i = 0; i < num; i++) {
1270 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1271 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1272 continue;
1273 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1274 manage(wins[i], &wa);
1275 }
1276 for(i = 0; i < num; i++) { /* now the transients */
1277 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1278 continue;
1279 if(XGetTransientForHint(dpy, wins[i], &d1)
1280 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1281 manage(wins[i], &wa);
1282 }
1283 }
1284 if(wins)
1285 XFree(wins);
1286 }
1287
1288 void
1289 setclientstate(Client *c, long state) {
1290 long data[] = {state, None};
1291
1292 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1293 PropModeReplace, (unsigned char *)data, 2);
1294 }
1295
1296 /* arg > 1.0 will set mfact absolutly */
1297 void
1298 setmfact(const void *arg) {
1299 double d = *((double*) arg);
1300
1301 if(!d || !lt->arrange)
1302 return;
1303 d = d < 1.0 ? d + mfact : d - 1.0;
1304 if(d < 0.1 || d > 0.9)
1305 return;
1306 mfact = d;
1307 arrange();
1308 }
1309
1310 void
1311 setup(void) {
1312 uint i, w;
1313 XSetWindowAttributes wa;
1314
1315 /* init screen */
1316 screen = DefaultScreen(dpy);
1317 root = RootWindow(dpy, screen);
1318 initfont(FONT);
1319 sx = 0;
1320 sy = 0;
1321 sw = DisplayWidth(dpy, screen);
1322 sh = DisplayHeight(dpy, screen);
1323 bh = dc.font.height + 2;
1324 updategeom();
1325
1326 /* init atoms */
1327 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1328 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1329 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1330 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1331 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1332 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1333
1334 /* init cursors */
1335 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1336 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1337 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1338
1339 /* init appearance */
1340 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1341 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1342 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1343 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1344 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1345 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1346 initfont(FONT);
1347 dc.h = bh;
1348 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1349 dc.gc = XCreateGC(dpy, root, 0, 0);
1350 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1351 if(!dc.font.set)
1352 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1353
1354 /* init bar */
1355 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1356 w = TEXTW(layouts[i].symbol);
1357 blw = MAX(blw, w);
1358 }
1359
1360 wa.override_redirect = 1;
1361 wa.background_pixmap = ParentRelative;
1362 wa.event_mask = ButtonPressMask|ExposureMask;
1363
1364 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1365 CopyFromParent, DefaultVisual(dpy, screen),
1366 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1367 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1368 XMapRaised(dpy, barwin);
1369 strcpy(stext, "dwm-"VERSION);
1370 drawbar();
1371
1372 /* EWMH support per view */
1373 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1374 PropModeReplace, (unsigned char *) netatom, NetLast);
1375
1376 /* select for events */
1377 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1378 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1379 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1380 XSelectInput(dpy, root, wa.event_mask);
1381
1382
1383 /* grab keys */
1384 grabkeys();
1385 }
1386
1387 void
1388 spawn(const void *arg) {
1389 static char *shell = NULL;
1390
1391 if(!shell && !(shell = getenv("SHELL")))
1392 shell = "/bin/sh";
1393 /* The double-fork construct avoids zombie processes and keeps the code
1394 * clean from stupid signal handlers. */
1395 if(fork() == 0) {
1396 if(fork() == 0) {
1397 if(dpy)
1398 close(ConnectionNumber(dpy));
1399 setsid();
1400 execl(shell, shell, "-c", (char *)arg, (char *)NULL);
1401 fprintf(stderr, "dwm: execl '%s -c %s'", shell, (char *)arg);
1402 perror(" failed");
1403 }
1404 exit(0);
1405 }
1406 wait(0);
1407 }
1408
1409 void
1410 tag(const void *arg) {
1411 if(sel && *(int *)arg & TAGMASK) {
1412 sel->tags = *(int *)arg & TAGMASK;
1413 arrange();
1414 }
1415 }
1416
1417 uint
1418 textnw(const char *text, uint len) {
1419 XRectangle r;
1420
1421 if(dc.font.set) {
1422 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1423 return r.width;
1424 }
1425 return XTextWidth(dc.font.xfont, text, len);
1426 }
1427
1428 void
1429 tile(void) {
1430 int x, y, h, w, mw;
1431 uint i, n;
1432 Client *c;
1433
1434 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1435 if(n == 0)
1436 return;
1437
1438 /* master */
1439 c = nexttiled(clients);
1440 mw = mfact * ww;
1441 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1442
1443 if(--n == 0)
1444 return;
1445
1446 /* tile stack */
1447 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1448 y = wy;
1449 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1450 h = wh / n;
1451 if(h < bh)
1452 h = wh;
1453
1454 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1455 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1456 ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
1457 if(h != wh)
1458 y = c->y + c->h + 2 * c->bw;
1459 }
1460 }
1461
1462 void
1463 togglebar(const void *arg) {
1464 showbar = !showbar;
1465 updategeom();
1466 updatebar();
1467 arrange();
1468 }
1469
1470 void
1471 togglefloating(const void *arg) {
1472 if(!sel)
1473 return;
1474 sel->isfloating = !sel->isfloating || sel->isfixed;
1475 if(sel->isfloating)
1476 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1477 arrange();
1478 }
1479
1480 void
1481 togglelayout(const void *arg) {
1482 uint i;
1483
1484 if(!arg) {
1485 if(++lt == &layouts[LENGTH(layouts)])
1486 lt = &layouts[0];
1487 }
1488 else {
1489 for(i = 0; i < LENGTH(layouts); i++)
1490 if(!strcmp((char *)arg, layouts[i].symbol))
1491 break;
1492 if(i == LENGTH(layouts))
1493 return;
1494 lt = &layouts[i];
1495 }
1496 if(sel)
1497 arrange();
1498 else
1499 drawbar();
1500 }
1501
1502 void
1503 togglemax(const void *arg) {
1504 ismax = !ismax;
1505 arrange();
1506 }
1507
1508 void
1509 toggletag(const void *arg) {
1510 if(sel && (sel->tags ^ ((*(int *)arg) & TAGMASK))) {
1511 sel->tags ^= (*(int *)arg) & TAGMASK;
1512 arrange();
1513 }
1514 }
1515
1516 void
1517 toggleview(const void *arg) {
1518 if((tagset[seltags] ^ ((*(int *)arg) & TAGMASK))) {
1519 tagset[seltags] ^= (*(int *)arg) & TAGMASK;
1520 arrange();
1521 }
1522 }
1523
1524 void
1525 unmanage(Client *c) {
1526 XWindowChanges wc;
1527
1528 wc.border_width = c->oldbw;
1529 /* The server grab construct avoids race conditions. */
1530 XGrabServer(dpy);
1531 XSetErrorHandler(xerrordummy);
1532 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1533 detach(c);
1534 detachstack(c);
1535 if(sel == c)
1536 focus(NULL);
1537 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1538 setclientstate(c, WithdrawnState);
1539 free(c);
1540 XSync(dpy, False);
1541 XSetErrorHandler(xerror);
1542 XUngrabServer(dpy);
1543 arrange();
1544 }
1545
1546 void
1547 unmapnotify(XEvent *e) {
1548 Client *c;
1549 XUnmapEvent *ev = &e->xunmap;
1550
1551 if((c = getclient(ev->window)))
1552 unmanage(c);
1553 }
1554
1555 void
1556 updatebar(void) {
1557 if(dc.drawable != 0)
1558 XFreePixmap(dpy, dc.drawable);
1559 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1560 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1561 }
1562
1563 void
1564 updategeom(void) {
1565 #ifdef XINERAMA
1566 int i;
1567 XineramaScreenInfo *info = NULL;
1568
1569 /* window area geometry */
1570 if(XineramaIsActive(dpy)) {
1571 info = XineramaQueryScreens(dpy, &i);
1572 wx = info[0].x_org;
1573 wy = showbar && topbar ? info[0].y_org + bh : info[0].y_org;
1574 ww = info[0].width;
1575 wh = showbar ? info[0].height - bh : info[0].height;
1576 XFree(info);
1577 }
1578 else
1579 #endif
1580 {
1581 wx = sx;
1582 wy = showbar && topbar ? sy + bh : sy;
1583 ww = sw;
1584 wh = showbar ? sh - bh : sh;
1585 }
1586
1587 /* bar position */
1588 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1589 }
1590
1591 void
1592 updatesizehints(Client *c) {
1593 long msize;
1594 XSizeHints size;
1595
1596 XGetWMNormalHints(dpy, c->win, &size, &msize);
1597 if(size.flags & PBaseSize) {
1598 c->basew = size.base_width;
1599 c->baseh = size.base_height;
1600 }
1601 else if(size.flags & PMinSize) {
1602 c->basew = size.min_width;
1603 c->baseh = size.min_height;
1604 }
1605 else
1606 c->basew = c->baseh = 0;
1607 if(size.flags & PResizeInc) {
1608 c->incw = size.width_inc;
1609 c->inch = size.height_inc;
1610 }
1611 else
1612 c->incw = c->inch = 0;
1613 if(size.flags & PMaxSize) {
1614 c->maxw = size.max_width;
1615 c->maxh = size.max_height;
1616 }
1617 else
1618 c->maxw = c->maxh = 0;
1619 if(size.flags & PMinSize) {
1620 c->minw = size.min_width;
1621 c->minh = size.min_height;
1622 }
1623 else if(size.flags & PBaseSize) {
1624 c->minw = size.base_width;
1625 c->minh = size.base_height;
1626 }
1627 else
1628 c->minw = c->minh = 0;
1629 if(size.flags & PAspect) {
1630 c->minax = size.min_aspect.x;
1631 c->maxax = size.max_aspect.x;
1632 c->minay = size.min_aspect.y;
1633 c->maxay = size.max_aspect.y;
1634 }
1635 else
1636 c->minax = c->maxax = c->minay = c->maxay = 0;
1637 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1638 && c->maxw == c->minw && c->maxh == c->minh);
1639 }
1640
1641 void
1642 updatetitle(Client *c) {
1643 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1644 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1645 }
1646
1647 void
1648 updatewmhints(Client *c) {
1649 XWMHints *wmh;
1650
1651 if((wmh = XGetWMHints(dpy, c->win))) {
1652 if(c == sel)
1653 sel->isurgent = False;
1654 else
1655 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1656 XFree(wmh);
1657 }
1658 }
1659
1660 void
1661 view(const void *arg) {
1662 seltags ^= 1; /* toggle sel tagset */
1663 if(arg && (*(int *)arg & TAGMASK))
1664 tagset[seltags] = *(int *)arg & TAGMASK;
1665 arrange();
1666 }
1667
1668 /* There's no way to check accesses to destroyed windows, thus those cases are
1669 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1670 * default error handler, which may call exit. */
1671 int
1672 xerror(Display *dpy, XErrorEvent *ee) {
1673 if(ee->error_code == BadWindow
1674 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1675 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1676 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1677 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1678 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1679 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1680 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1681 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1682 return 0;
1683 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1684 ee->request_code, ee->error_code);
1685 return xerrorxlib(dpy, ee); /* may call exit */
1686 }
1687
1688 int
1689 xerrordummy(Display *dpy, XErrorEvent *ee) {
1690 return 0;
1691 }
1692
1693 /* Startup Error handler to check if another window manager
1694 * is already running. */
1695 int
1696 xerrorstart(Display *dpy, XErrorEvent *ee) {
1697 otherwm = True;
1698 return -1;
1699 }
1700
1701 void
1702 zoom(const void *arg) {
1703 Client *c = sel;
1704
1705 if(ismax || !lt->arrange || (sel && sel->isfloating))
1706 return;
1707 if(c == nexttiled(clients))
1708 if(!c || !(c = nexttiled(c->next)))
1709 return;
1710 detach(c);
1711 attach(c);
1712 focus(c);
1713 arrange();
1714 }
1715
1716 int
1717 main(int argc, char *argv[]) {
1718 if(argc == 2 && !strcmp("-v", argv[1]))
1719 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1720 else if(argc != 1)
1721 eprint("usage: dwm [-v]\n");
1722
1723 setlocale(LC_CTYPE, "");
1724 if(!(dpy = XOpenDisplay(0)))
1725 eprint("dwm: cannot open display\n");
1726
1727 checkotherwm();
1728 setup();
1729 scan();
1730 run();
1731 cleanup();
1732
1733 XCloseDisplay(dpy);
1734 return 0;
1735 }