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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 an array of Bools of the same size as the
20 * global tags array to indicate the tags of a 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
56 /* enums */
57 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
58 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
59 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
60 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
61
62 /* typedefs */
63 typedef struct Client Client;
64 struct Client {
65 char name[256];
66 int x, y, w, h;
67 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
68 int minax, maxax, minay, maxay;
69 long flags;
70 unsigned int bw, oldbw;
71 Bool isbanned, isfixed, isfloating, isurgent;
72 unsigned int tags;
73 Client *next;
74 Client *prev;
75 Client *snext;
76 Window win;
77 };
78
79 typedef struct {
80 int x, y, w, h;
81 unsigned long norm[ColLast];
82 unsigned long sel[ColLast];
83 Drawable drawable;
84 GC gc;
85 struct {
86 int ascent;
87 int descent;
88 int height;
89 XFontSet set;
90 XFontStruct *xfont;
91 } font;
92 } DC; /* draw context */
93
94 typedef struct {
95 unsigned long mod;
96 KeySym keysym;
97 void (*func)(const void *arg);
98 const void *arg;
99 } Key;
100
101 typedef struct {
102 const char *symbol;
103 void (*arrange)(void);
104 void (*updategeom)(void);
105 } Layout;
106
107 typedef struct {
108 const char *class;
109 const char *instance;
110 const char *title;
111 unsigned int tags;
112 Bool isfloating;
113 } Rule;
114
115 /* function declarations */
116 void applyrules(Client *c);
117 void arrange(void);
118 void attach(Client *c);
119 void attachstack(Client *c);
120 void ban(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, unsigned long col[ColLast]);
132 void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
133 void *emallocz(unsigned int size);
134 void enternotify(XEvent *e);
135 void eprint(const char *errstr, ...);
136 void expose(XEvent *e);
137 void focus(Client *c);
138 void focusin(XEvent *e);
139 void focusnext(const void *arg);
140 void focusprev(const void *arg);
141 Client *getclient(Window w);
142 unsigned long getcolor(const char *colstr);
143 long getstate(Window w);
144 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
145 void grabbuttons(Client *c, Bool focused);
146 void grabkeys(void);
147 void initfont(const char *fontstr);
148 Bool isoccupied(unsigned int t);
149 Bool isprotodel(Client *c);
150 Bool isurgent(unsigned int t);
151 Bool isvisible(Client *c);
152 void keypress(XEvent *e);
153 void killclient(const void *arg);
154 void manage(Window w, XWindowAttributes *wa);
155 void mappingnotify(XEvent *e);
156 void maprequest(XEvent *e);
157 void movemouse(Client *c);
158 Client *nextunfloating(Client *c);
159 void propertynotify(XEvent *e);
160 void quit(const void *arg);
161 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
162 void resizemouse(Client *c);
163 void restack(void);
164 void run(void);
165 void scan(void);
166 void setclientstate(Client *c, long state);
167 void setmfact(const void *arg);
168 void setup(void);
169 void spawn(const void *arg);
170 void tag(const void *arg);
171 unsigned int textnw(const char *text, unsigned int len);
172 unsigned int textw(const char *text);
173 void tile(void);
174 void tileresize(Client *c, int x, int y, int w, int h);
175 void togglebar(const void *arg);
176 void togglefloating(const void *arg);
177 void togglelayout(const void *arg);
178 void toggletag(const void *arg);
179 void toggleview(const void *arg);
180 void unban(Client *c);
181 void unmanage(Client *c);
182 void unmapnotify(XEvent *e);
183 void updatebar(void);
184 void updategeom(void);
185 void updatesizehints(Client *c);
186 void updatetilegeom(void);
187 void updatetitle(Client *c);
188 void updatewmhints(Client *c);
189 void view(const void *arg);
190 void viewprevtag(const void *arg);
191 int xerror(Display *dpy, XErrorEvent *ee);
192 int xerrordummy(Display *dpy, XErrorEvent *ee);
193 int xerrorstart(Display *dpy, XErrorEvent *ee);
194 void zoom(const void *arg);
195
196 /* variables */
197 char stext[256];
198 int screen, sx, sy, sw, sh;
199 int bx, by, bw, bh, blw, wx, wy, ww, wh;
200 int mx, my, mw, mh, tx, ty, tw, th;
201 unsigned int seltags = 0;
202 int (*xerrorxlib)(Display *, XErrorEvent *);
203 unsigned int numlockmask = 0;
204 void (*handler[LASTEvent]) (XEvent *) = {
205 [ButtonPress] = buttonpress,
206 [ConfigureRequest] = configurerequest,
207 [ConfigureNotify] = configurenotify,
208 [DestroyNotify] = destroynotify,
209 [EnterNotify] = enternotify,
210 [Expose] = expose,
211 [FocusIn] = focusin,
212 [KeyPress] = keypress,
213 [MappingNotify] = mappingnotify,
214 [MapRequest] = maprequest,
215 [PropertyNotify] = propertynotify,
216 [UnmapNotify] = unmapnotify
217 };
218 Atom wmatom[WMLast], netatom[NetLast];
219 Bool otherwm, readin;
220 Bool running = True;
221 unsigned int tagset[] = {1, 1}; /* after start, first tag is selected */
222 Client *clients = NULL;
223 Client *sel = NULL;
224 Client *stack = NULL;
225 Cursor cursor[CurLast];
226 Display *dpy;
227 DC dc = {0};
228 Layout layouts[];
229 Layout *lt = layouts;
230 Window root, barwin;
231
232 /* configuration, allows nested code to access above variables */
233 #include "config.h"
234
235 /* check if all tags will fit into a unsigned int bitarray. */
236 static char tags_is_a_sign_that_your_IQ[sizeof(int) * 8 < LENGTH(tags) ? -1 : 1];
237
238 /* function implementations */
239
240 void
241 applyrules(Client *c) {
242 unsigned int i;
243 Rule *r;
244 XClassHint ch = { 0 };
245
246 /* rule matching */
247 XGetClassHint(dpy, c->win, &ch);
248 for(i = 0; i < LENGTH(rules); i++) {
249 r = &rules[i];
250 if((!r->title || strstr(c->name, r->title))
251 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
252 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
253 c->isfloating = r->isfloating;
254 c->tags |= r->tags & TAGMASK;
255 }
256 }
257 if(ch.res_class)
258 XFree(ch.res_class);
259 if(ch.res_name)
260 XFree(ch.res_name);
261 if(!c->tags)
262 c->tags = tagset[seltags];
263 }
264
265 void
266 arrange(void) {
267 Client *c;
268
269 for(c = clients; c; c = c->next)
270 if(isvisible(c)) {
271 unban(c);
272 if(!lt->arrange || c->isfloating)
273 resize(c, c->x, c->y, c->w, c->h, True);
274 }
275 else
276 ban(c);
277
278 focus(NULL);
279 if(lt->arrange)
280 lt->arrange();
281 restack();
282 }
283
284 void
285 attach(Client *c) {
286 if(clients)
287 clients->prev = 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 ban(Client *c) {
300 if(c->isbanned)
301 return;
302 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
303 c->isbanned = True;
304 }
305
306 void
307 buttonpress(XEvent *e) {
308 unsigned int i, x, mask;
309 Client *c;
310 XButtonPressedEvent *ev = &e->xbutton;
311
312 if(ev->window == barwin) {
313 x = 0;
314 for(i = 0; i < LENGTH(tags); i++) {
315 x += textw(tags[i]);
316 if(ev->x < x) {
317 mask = 1 << i;
318 if(ev->button == Button1) {
319 if(ev->state & MODKEY)
320 tag(&mask);
321 else
322 view(&mask);
323 }
324 else if(ev->button == Button3) {
325 if(ev->state & MODKEY)
326 toggletag(&mask);
327 else
328 toggleview(&mask);
329 }
330 return;
331 }
332 }
333 if((ev->x < x + blw) && ev->button == Button1)
334 togglelayout(NULL);
335 }
336 else if((c = getclient(ev->window))) {
337 focus(c);
338 if(CLEANMASK(ev->state) != MODKEY)
339 return;
340 if(ev->button == Button1) {
341 restack();
342 movemouse(c);
343 }
344 else if(ev->button == Button2)
345 togglefloating(NULL);
346 else if(ev->button == Button3 && !c->isfixed) {
347 restack();
348 resizemouse(c);
349 }
350 }
351 }
352
353 void
354 checkotherwm(void) {
355 otherwm = False;
356 XSetErrorHandler(xerrorstart);
357
358 /* this causes an error if some other window manager is running */
359 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
360 XSync(dpy, False);
361 if(otherwm)
362 eprint("dwm: another window manager is already running\n");
363 XSync(dpy, False);
364 XSetErrorHandler(NULL);
365 xerrorxlib = XSetErrorHandler(xerror);
366 XSync(dpy, False);
367 }
368
369 void
370 cleanup(void) {
371 close(STDIN_FILENO);
372 while(stack) {
373 unban(stack);
374 unmanage(stack);
375 }
376 if(dc.font.set)
377 XFreeFontSet(dpy, dc.font.set);
378 else
379 XFreeFont(dpy, dc.font.xfont);
380 XUngrabKey(dpy, AnyKey, AnyModifier, root);
381 XFreePixmap(dpy, dc.drawable);
382 XFreeGC(dpy, dc.gc);
383 XFreeCursor(dpy, cursor[CurNormal]);
384 XFreeCursor(dpy, cursor[CurResize]);
385 XFreeCursor(dpy, cursor[CurMove]);
386 XDestroyWindow(dpy, barwin);
387 XSync(dpy, False);
388 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
389 }
390
391 void
392 configure(Client *c) {
393 XConfigureEvent ce;
394
395 ce.type = ConfigureNotify;
396 ce.display = dpy;
397 ce.event = c->win;
398 ce.window = c->win;
399 ce.x = c->x;
400 ce.y = c->y;
401 ce.width = c->w;
402 ce.height = c->h;
403 ce.border_width = c->bw;
404 ce.above = None;
405 ce.override_redirect = False;
406 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
407 }
408
409 void
410 configurenotify(XEvent *e) {
411 XConfigureEvent *ev = &e->xconfigure;
412
413 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
414 sw = ev->width;
415 sh = ev->height;
416 updategeom();
417 updatebar();
418 arrange();
419 }
420 }
421
422 void
423 configurerequest(XEvent *e) {
424 Client *c;
425 XConfigureRequestEvent *ev = &e->xconfigurerequest;
426 XWindowChanges wc;
427
428 if((c = getclient(ev->window))) {
429 if(ev->value_mask & CWBorderWidth)
430 c->bw = ev->border_width;
431 if(c->isfixed || c->isfloating || !lt->arrange) {
432 if(ev->value_mask & CWX)
433 c->x = sx + ev->x;
434 if(ev->value_mask & CWY)
435 c->y = sy + ev->y;
436 if(ev->value_mask & CWWidth)
437 c->w = ev->width;
438 if(ev->value_mask & CWHeight)
439 c->h = ev->height;
440 if((c->x - sx + c->w) > sw && c->isfloating)
441 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
442 if((c->y - sy + c->h) > sh && c->isfloating)
443 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
444 if((ev->value_mask & (CWX|CWY))
445 && !(ev->value_mask & (CWWidth|CWHeight)))
446 configure(c);
447 if(isvisible(c))
448 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
449 }
450 else
451 configure(c);
452 }
453 else {
454 wc.x = ev->x;
455 wc.y = ev->y;
456 wc.width = ev->width;
457 wc.height = ev->height;
458 wc.border_width = ev->border_width;
459 wc.sibling = ev->above;
460 wc.stack_mode = ev->detail;
461 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
462 }
463 XSync(dpy, False);
464 }
465
466 void
467 destroynotify(XEvent *e) {
468 Client *c;
469 XDestroyWindowEvent *ev = &e->xdestroywindow;
470
471 if((c = getclient(ev->window)))
472 unmanage(c);
473 }
474
475 void
476 detach(Client *c) {
477 if(c->prev)
478 c->prev->next = c->next;
479 if(c->next)
480 c->next->prev = c->prev;
481 if(c == clients)
482 clients = c->next;
483 c->next = c->prev = 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 && !isvisible(c); 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, False);
516 x = dc.x + dc.w;
517 }
518 else
519 x = dc.x;
520 dc.w = textw(stext);
521 dc.x = bw - dc.w;
522 if(dc.x < x) {
523 dc.x = x;
524 dc.w = bw - 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(False, 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, bw, bh, 0, 0);
537 XSync(dpy, False);
538 }
539
540 void
541 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long 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, unsigned long col[ColLast], Bool invert) {
563 int x, y, w, h;
564 unsigned int len, olen;
565 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
566 char buf[256];
567
568 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
569 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
570 if(!text)
571 return;
572 olen = strlen(text);
573 len = MIN(olen, sizeof buf);
574 memcpy(buf, text, len);
575 w = 0;
576 h = dc.font.ascent + dc.font.descent;
577 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
578 x = dc.x + (h / 2);
579 /* shorten text if necessary */
580 for(; len && (w = textnw(buf, len)) > dc.w - h; len--);
581 if(!len)
582 return;
583 if(len < olen) {
584 if(len > 1)
585 buf[len - 1] = '.';
586 if(len > 2)
587 buf[len - 2] = '.';
588 if(len > 3)
589 buf[len - 3] = '.';
590 }
591 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
592 if(dc.font.set)
593 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
594 else
595 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
596 }
597
598 void *
599 emallocz(unsigned int size) {
600 void *res = calloc(1, size);
601
602 if(!res)
603 eprint("fatal: could not malloc() %u bytes\n", size);
604 return res;
605 }
606
607 void
608 enternotify(XEvent *e) {
609 Client *c;
610 XCrossingEvent *ev = &e->xcrossing;
611
612 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
613 return;
614 if((c = getclient(ev->window)))
615 focus(c);
616 else
617 focus(NULL);
618 }
619
620 void
621 eprint(const char *errstr, ...) {
622 va_list ap;
623
624 va_start(ap, errstr);
625 vfprintf(stderr, errstr, ap);
626 va_end(ap);
627 exit(EXIT_FAILURE);
628 }
629
630 void
631 expose(XEvent *e) {
632 XExposeEvent *ev = &e->xexpose;
633
634 if(ev->count == 0 && (ev->window == barwin))
635 drawbar();
636 }
637
638 void
639 focus(Client *c) {
640 if(!c || (c && !isvisible(c)))
641 for(c = stack; c && !isvisible(c); c = c->snext);
642 if(sel && sel != c) {
643 grabbuttons(sel, False);
644 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
645 }
646 if(c) {
647 detachstack(c);
648 attachstack(c);
649 grabbuttons(c, True);
650 }
651 sel = c;
652 if(c) {
653 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
654 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
655 }
656 else
657 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
658 drawbar();
659 }
660
661 void
662 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
663 XFocusChangeEvent *ev = &e->xfocus;
664
665 if(sel && ev->window != sel->win)
666 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
667 }
668
669 void
670 focusnext(const void *arg) {
671 Client *c;
672
673 if(!sel)
674 return;
675 for(c = sel->next; c && !isvisible(c); c = c->next);
676 if(!c)
677 for(c = clients; c && !isvisible(c); c = c->next);
678 if(c) {
679 focus(c);
680 restack();
681 }
682 }
683
684 void
685 focusprev(const void *arg) {
686 Client *c;
687
688 if(!sel)
689 return;
690 for(c = sel->prev; c && !isvisible(c); c = c->prev);
691 if(!c) {
692 for(c = clients; c && c->next; c = c->next);
693 for(; c && !isvisible(c); c = c->prev);
694 }
695 if(c) {
696 focus(c);
697 restack();
698 }
699 }
700
701 Client *
702 getclient(Window w) {
703 Client *c;
704
705 for(c = clients; c && c->win != w; c = c->next);
706 return c;
707 }
708
709 unsigned long
710 getcolor(const char *colstr) {
711 Colormap cmap = DefaultColormap(dpy, screen);
712 XColor color;
713
714 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
715 eprint("error, cannot allocate color '%s'\n", colstr);
716 return color.pixel;
717 }
718
719 long
720 getstate(Window w) {
721 int format, status;
722 long result = -1;
723 unsigned char *p = NULL;
724 unsigned long n, extra;
725 Atom real;
726
727 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
728 &real, &format, &n, &extra, (unsigned char **)&p);
729 if(status != Success)
730 return -1;
731 if(n != 0)
732 result = *p;
733 XFree(p);
734 return result;
735 }
736
737 Bool
738 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
739 char **list = NULL;
740 int n;
741 XTextProperty name;
742
743 if(!text || size == 0)
744 return False;
745 text[0] = '\0';
746 XGetTextProperty(dpy, w, &name, atom);
747 if(!name.nitems)
748 return False;
749 if(name.encoding == XA_STRING)
750 strncpy(text, (char *)name.value, size - 1);
751 else {
752 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
753 && n > 0 && *list) {
754 strncpy(text, *list, size - 1);
755 XFreeStringList(list);
756 }
757 }
758 text[size - 1] = '\0';
759 XFree(name.value);
760 return True;
761 }
762
763 void
764 grabbuttons(Client *c, Bool focused) {
765 int i, j;
766 unsigned int buttons[] = { Button1, Button2, Button3 };
767 unsigned int modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask,
768 MODKEY|numlockmask|LockMask} ;
769
770 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
771 if(focused)
772 for(i = 0; i < LENGTH(buttons); i++)
773 for(j = 0; j < LENGTH(modifiers); j++)
774 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
775 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
776 else
777 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
778 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
779 }
780
781 void
782 grabkeys(void) {
783 unsigned int i, j;
784 KeyCode code;
785 XModifierKeymap *modmap;
786
787 /* init modifier map */
788 modmap = XGetModifierMapping(dpy);
789 for(i = 0; i < 8; i++)
790 for(j = 0; j < modmap->max_keypermod; j++) {
791 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
792 numlockmask = (1 << i);
793 }
794 XFreeModifiermap(modmap);
795
796 XUngrabKey(dpy, AnyKey, AnyModifier, root);
797 for(i = 0; i < LENGTH(keys); i++) {
798 code = XKeysymToKeycode(dpy, keys[i].keysym);
799 XGrabKey(dpy, code, keys[i].mod, root, True,
800 GrabModeAsync, GrabModeAsync);
801 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
802 GrabModeAsync, GrabModeAsync);
803 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
804 GrabModeAsync, GrabModeAsync);
805 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
806 GrabModeAsync, GrabModeAsync);
807 }
808 }
809
810 void
811 initfont(const char *fontstr) {
812 char *def, **missing;
813 int i, n;
814
815 missing = NULL;
816 if(dc.font.set)
817 XFreeFontSet(dpy, dc.font.set);
818 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
819 if(missing) {
820 while(n--)
821 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
822 XFreeStringList(missing);
823 }
824 if(dc.font.set) {
825 XFontSetExtents *font_extents;
826 XFontStruct **xfonts;
827 char **font_names;
828 dc.font.ascent = dc.font.descent = 0;
829 font_extents = XExtentsOfFontSet(dc.font.set);
830 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
831 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
832 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
833 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
834 xfonts++;
835 }
836 }
837 else {
838 if(dc.font.xfont)
839 XFreeFont(dpy, dc.font.xfont);
840 dc.font.xfont = NULL;
841 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
842 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
843 eprint("error, cannot load font: '%s'\n", fontstr);
844 dc.font.ascent = dc.font.xfont->ascent;
845 dc.font.descent = dc.font.xfont->descent;
846 }
847 dc.font.height = dc.font.ascent + dc.font.descent;
848 }
849
850 Bool
851 isoccupied(unsigned int t) {
852 Client *c;
853
854 for(c = clients; c; c = c->next)
855 if(c->tags & 1 << t)
856 return True;
857 return False;
858 }
859
860 Bool
861 isprotodel(Client *c) {
862 int i, n;
863 Atom *protocols;
864 Bool ret = False;
865
866 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
867 for(i = 0; !ret && i < n; i++)
868 if(protocols[i] == wmatom[WMDelete])
869 ret = True;
870 XFree(protocols);
871 }
872 return ret;
873 }
874
875 Bool
876 isurgent(unsigned int t) {
877 Client *c;
878
879 for(c = clients; c; c = c->next)
880 if(c->isurgent && c->tags & 1 << t)
881 return True;
882 return False;
883 }
884
885 Bool
886 isvisible(Client *c) {
887 return c->tags & tagset[seltags];
888 }
889
890 void
891 keypress(XEvent *e) {
892 unsigned int i;
893 KeySym keysym;
894 XKeyEvent *ev;
895
896 ev = &e->xkey;
897 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
898 for(i = 0; i < LENGTH(keys); i++)
899 if(keysym == keys[i].keysym
900 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
901 {
902 if(keys[i].func)
903 keys[i].func(keys[i].arg);
904 }
905 }
906
907 void
908 killclient(const void *arg) {
909 XEvent ev;
910
911 if(!sel)
912 return;
913 if(isprotodel(sel)) {
914 ev.type = ClientMessage;
915 ev.xclient.window = sel->win;
916 ev.xclient.message_type = wmatom[WMProtocols];
917 ev.xclient.format = 32;
918 ev.xclient.data.l[0] = wmatom[WMDelete];
919 ev.xclient.data.l[1] = CurrentTime;
920 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
921 }
922 else
923 XKillClient(dpy, sel->win);
924 }
925
926 void
927 manage(Window w, XWindowAttributes *wa) {
928 Client *c, *t = NULL;
929 Status rettrans;
930 Window trans;
931 XWindowChanges wc;
932
933 c = emallocz(sizeof(Client));
934 c->win = w;
935
936 /* geometry */
937 c->x = wa->x;
938 c->y = wa->y;
939 c->w = wa->width;
940 c->h = wa->height;
941 c->oldbw = wa->border_width;
942 if(c->w == sw && c->h == sh) {
943 c->x = sx;
944 c->y = sy;
945 c->bw = wa->border_width;
946 }
947 else {
948 if(c->x + c->w + 2 * c->bw > sx + sw)
949 c->x = sx + sw - c->w - 2 * c->bw;
950 if(c->y + c->h + 2 * c->bw > sy + sh)
951 c->y = sy + sh - c->h - 2 * c->bw;
952 c->x = MAX(c->x, sx);
953 c->y = MAX(c->y, by == 0 ? bh : sy);
954 c->bw = borderpx;
955 }
956
957 wc.border_width = c->bw;
958 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
959 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
960 configure(c); /* propagates border_width, if size doesn't change */
961 updatesizehints(c);
962 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
963 grabbuttons(c, False);
964 updatetitle(c);
965 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
966 for(t = clients; t && t->win != trans; t = t->next);
967 if(t)
968 c->tags = t->tags;
969 else
970 applyrules(c);
971 if(!c->isfloating)
972 c->isfloating = (rettrans == Success) || c->isfixed;
973 attach(c);
974 attachstack(c);
975 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
976 ban(c);
977 XMapWindow(dpy, c->win);
978 setclientstate(c, NormalState);
979 arrange();
980 }
981
982 void
983 mappingnotify(XEvent *e) {
984 XMappingEvent *ev = &e->xmapping;
985
986 XRefreshKeyboardMapping(ev);
987 if(ev->request == MappingKeyboard)
988 grabkeys();
989 }
990
991 void
992 maprequest(XEvent *e) {
993 static XWindowAttributes wa;
994 XMapRequestEvent *ev = &e->xmaprequest;
995
996 if(!XGetWindowAttributes(dpy, ev->window, &wa))
997 return;
998 if(wa.override_redirect)
999 return;
1000 if(!getclient(ev->window))
1001 manage(ev->window, &wa);
1002 }
1003
1004 void
1005 movemouse(Client *c) {
1006 int x1, y1, ocx, ocy, di, nx, ny;
1007 unsigned int dui;
1008 Window dummy;
1009 XEvent ev;
1010
1011 ocx = nx = c->x;
1012 ocy = ny = c->y;
1013 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1014 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1015 return;
1016 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1017 for(;;) {
1018 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1019 switch (ev.type) {
1020 case ButtonRelease:
1021 XUngrabPointer(dpy, CurrentTime);
1022 return;
1023 case ConfigureRequest:
1024 case Expose:
1025 case MapRequest:
1026 handler[ev.type](&ev);
1027 break;
1028 case MotionNotify:
1029 XSync(dpy, False);
1030 nx = ocx + (ev.xmotion.x - x1);
1031 ny = ocy + (ev.xmotion.y - y1);
1032 if(snap && nx >= wx && nx <= wx + ww
1033 && ny >= wy && ny <= wy + wh) {
1034 if(abs(wx - nx) < snap)
1035 nx = wx;
1036 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
1037 nx = wx + ww - c->w - 2 * c->bw;
1038 if(abs(wy - ny) < snap)
1039 ny = wy;
1040 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
1041 ny = wy + wh - c->h - 2 * c->bw;
1042 if(!c->isfloating && lt->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1043 togglefloating(NULL);
1044 }
1045 if(!lt->arrange || c->isfloating)
1046 resize(c, nx, ny, c->w, c->h, False);
1047 break;
1048 }
1049 }
1050 }
1051
1052 Client *
1053 nextunfloating(Client *c) {
1054 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1055 return c;
1056 }
1057
1058 void
1059 propertynotify(XEvent *e) {
1060 Client *c;
1061 Window trans;
1062 XPropertyEvent *ev = &e->xproperty;
1063
1064 if(ev->state == PropertyDelete)
1065 return; /* ignore */
1066 if((c = getclient(ev->window))) {
1067 switch (ev->atom) {
1068 default: break;
1069 case XA_WM_TRANSIENT_FOR:
1070 XGetTransientForHint(dpy, c->win, &trans);
1071 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1072 arrange();
1073 break;
1074 case XA_WM_NORMAL_HINTS:
1075 updatesizehints(c);
1076 break;
1077 case XA_WM_HINTS:
1078 updatewmhints(c);
1079 drawbar();
1080 break;
1081 }
1082 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1083 updatetitle(c);
1084 if(c == sel)
1085 drawbar();
1086 }
1087 }
1088 }
1089
1090 void
1091 quit(const void *arg) {
1092 readin = running = False;
1093 }
1094
1095 void
1096 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1097 XWindowChanges wc;
1098
1099 if(sizehints) {
1100 /* set minimum possible */
1101 w = MAX(1, w);
1102 h = MAX(1, h);
1103
1104 /* temporarily remove base dimensions */
1105 w -= c->basew;
1106 h -= c->baseh;
1107
1108 /* adjust for aspect limits */
1109 if(c->minax != c->maxax && c->minay != c->maxay
1110 && c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0) {
1111 if(w * c->maxay > h * c->maxax)
1112 w = h * c->maxax / c->maxay;
1113 else if(w * c->minay < h * c->minax)
1114 h = w * c->minay / c->minax;
1115 }
1116
1117 /* adjust for increment value */
1118 if(c->incw)
1119 w -= w % c->incw;
1120 if(c->inch)
1121 h -= h % c->inch;
1122
1123 /* restore base dimensions */
1124 w += c->basew;
1125 h += c->baseh;
1126
1127 w = MAX(w, c->minw);
1128 h = MAX(h, c->minh);
1129
1130 if (c->maxw)
1131 w = MIN(w, c->maxw);
1132
1133 if (c->maxh)
1134 h = MIN(h, c->maxh);
1135 }
1136 if(w <= 0 || h <= 0)
1137 return;
1138 if(x > sx + sw)
1139 x = sw - w - 2 * c->bw;
1140 if(y > sy + sh)
1141 y = sh - h - 2 * c->bw;
1142 if(x + w + 2 * c->bw < sx)
1143 x = sx;
1144 if(y + h + 2 * c->bw < sy)
1145 y = sy;
1146 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1147 c->x = wc.x = x;
1148 c->y = wc.y = y;
1149 c->w = wc.width = w;
1150 c->h = wc.height = h;
1151 wc.border_width = c->bw;
1152 XConfigureWindow(dpy, c->win,
1153 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1154 configure(c);
1155 XSync(dpy, False);
1156 }
1157 }
1158
1159 void
1160 resizemouse(Client *c) {
1161 int ocx, ocy;
1162 int nw, nh;
1163 XEvent ev;
1164
1165 ocx = c->x;
1166 ocy = c->y;
1167 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1168 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1169 return;
1170 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1171 for(;;) {
1172 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1173 switch(ev.type) {
1174 case ButtonRelease:
1175 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1176 c->w + c->bw - 1, c->h + c->bw - 1);
1177 XUngrabPointer(dpy, CurrentTime);
1178 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1179 return;
1180 case ConfigureRequest:
1181 case Expose:
1182 case MapRequest:
1183 handler[ev.type](&ev);
1184 break;
1185 case MotionNotify:
1186 XSync(dpy, False);
1187 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1188 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1189
1190 if(snap && nw >= wx && nw <= wx + ww
1191 && nh >= wy && nh <= wy + wh) {
1192 if(!c->isfloating && lt->arrange
1193 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1194 togglefloating(NULL);
1195 }
1196 if(!lt->arrange || c->isfloating)
1197 resize(c, c->x, c->y, nw, nh, True);
1198 break;
1199 }
1200 }
1201 }
1202
1203 void
1204 restack(void) {
1205 Client *c;
1206 XEvent ev;
1207 XWindowChanges wc;
1208
1209 drawbar();
1210 if(!sel)
1211 return;
1212 if(sel->isfloating || !lt->arrange)
1213 XRaiseWindow(dpy, sel->win);
1214 if(lt->arrange) {
1215 wc.stack_mode = Below;
1216 wc.sibling = barwin;
1217 for(c = stack; c; c = c->snext)
1218 if(!c->isfloating && isvisible(c)) {
1219 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1220 wc.sibling = c->win;
1221 }
1222 }
1223 XSync(dpy, False);
1224 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1225 }
1226
1227 void
1228 run(void) {
1229 char *p;
1230 char sbuf[sizeof stext];
1231 fd_set rd;
1232 int r, xfd;
1233 unsigned int len, offset;
1234 XEvent ev;
1235
1236 /* main event loop, also reads status text from stdin */
1237 XSync(dpy, False);
1238 xfd = ConnectionNumber(dpy);
1239 readin = True;
1240 offset = 0;
1241 len = sizeof stext - 1;
1242 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1243 while(running) {
1244 FD_ZERO(&rd);
1245 if(readin)
1246 FD_SET(STDIN_FILENO, &rd);
1247 FD_SET(xfd, &rd);
1248 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1249 if(errno == EINTR)
1250 continue;
1251 eprint("select failed\n");
1252 }
1253 if(FD_ISSET(STDIN_FILENO, &rd)) {
1254 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1255 case -1:
1256 strncpy(stext, strerror(errno), len);
1257 readin = False;
1258 break;
1259 case 0:
1260 strncpy(stext, "EOF", 4);
1261 readin = False;
1262 break;
1263 default:
1264 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1265 if(*p == '\n' || *p == '\0') {
1266 *p = '\0';
1267 strncpy(stext, sbuf, len);
1268 p += r - 1; /* p is sbuf + offset + r - 1 */
1269 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1270 offset = r;
1271 if(r)
1272 memmove(sbuf, p - r + 1, r);
1273 break;
1274 }
1275 break;
1276 }
1277 drawbar();
1278 }
1279 while(XPending(dpy)) {
1280 XNextEvent(dpy, &ev);
1281 if(handler[ev.type])
1282 (handler[ev.type])(&ev); /* call handler */
1283 }
1284 }
1285 }
1286
1287 void
1288 scan(void) {
1289 unsigned int i, num;
1290 Window *wins, d1, d2;
1291 XWindowAttributes wa;
1292
1293 wins = NULL;
1294 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1295 for(i = 0; i < num; i++) {
1296 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1297 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1298 continue;
1299 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1300 manage(wins[i], &wa);
1301 }
1302 for(i = 0; i < num; i++) { /* now the transients */
1303 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1304 continue;
1305 if(XGetTransientForHint(dpy, wins[i], &d1)
1306 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1307 manage(wins[i], &wa);
1308 }
1309 }
1310 if(wins)
1311 XFree(wins);
1312 }
1313
1314 void
1315 setclientstate(Client *c, long state) {
1316 long data[] = {state, None};
1317
1318 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1319 PropModeReplace, (unsigned char *)data, 2);
1320 }
1321
1322 /* arg > 1.0 will set mfact absolutly */
1323 void
1324 setmfact(const void *arg) {
1325 double d = *((double*) arg);
1326
1327 if(!d || lt->arrange != tile)
1328 return;
1329 d = d < 1.0 ? d + mfact : d - 1.0;
1330 if(d < 0.1 || d > 0.9)
1331 return;
1332 mfact = d;
1333 updatetilegeom();
1334 arrange();
1335 }
1336
1337 void
1338 setup(void) {
1339 unsigned int i, w;
1340 XSetWindowAttributes wa;
1341
1342 /* init screen */
1343 screen = DefaultScreen(dpy);
1344 root = RootWindow(dpy, screen);
1345 initfont(FONT);
1346 sx = 0;
1347 sy = 0;
1348 sw = DisplayWidth(dpy, screen);
1349 sh = DisplayHeight(dpy, screen);
1350 bh = dc.font.height + 2;
1351 updategeom();
1352
1353 /* init atoms */
1354 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1355 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1356 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1357 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1358 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1359 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1360
1361 /* init cursors */
1362 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1363 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1364 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1365
1366 /* init appearance */
1367 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1368 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1369 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1370 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1371 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1372 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1373 initfont(FONT);
1374 dc.h = bh;
1375 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1376 dc.gc = XCreateGC(dpy, root, 0, 0);
1377 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1378 if(!dc.font.set)
1379 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1380
1381 /* init bar */
1382 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1383 w = textw(layouts[i].symbol);
1384 blw = MAX(blw, w);
1385 }
1386
1387 wa.override_redirect = 1;
1388 wa.background_pixmap = ParentRelative;
1389 wa.event_mask = ButtonPressMask|ExposureMask;
1390
1391 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1392 CopyFromParent, DefaultVisual(dpy, screen),
1393 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1394 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1395 XMapRaised(dpy, barwin);
1396 strcpy(stext, "dwm-"VERSION);
1397 drawbar();
1398
1399 /* EWMH support per view */
1400 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1401 PropModeReplace, (unsigned char *) netatom, NetLast);
1402
1403 /* select for events */
1404 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1405 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1406 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1407 XSelectInput(dpy, root, wa.event_mask);
1408
1409
1410 /* grab keys */
1411 grabkeys();
1412 }
1413
1414 void
1415 spawn(const void *arg) {
1416 static char *shell = NULL;
1417
1418 if(!shell && !(shell = getenv("SHELL")))
1419 shell = "/bin/sh";
1420 /* The double-fork construct avoids zombie processes and keeps the code
1421 * clean from stupid signal handlers. */
1422 if(fork() == 0) {
1423 if(fork() == 0) {
1424 if(dpy)
1425 close(ConnectionNumber(dpy));
1426 setsid();
1427 execl(shell, shell, "-c", (char *)arg, (char *)NULL);
1428 fprintf(stderr, "dwm: execl '%s -c %s'", shell, (char *)arg);
1429 perror(" failed");
1430 }
1431 exit(0);
1432 }
1433 wait(0);
1434 }
1435
1436 void
1437 tag(const void *arg) {
1438 if(sel && *(int *)arg & TAGMASK) {
1439 sel->tags = *(int *)arg & TAGMASK;
1440 arrange();
1441 }
1442 }
1443
1444 unsigned int
1445 textnw(const char *text, unsigned int len) {
1446 XRectangle r;
1447
1448 if(dc.font.set) {
1449 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1450 return r.width;
1451 }
1452 return XTextWidth(dc.font.xfont, text, len);
1453 }
1454
1455 unsigned int
1456 textw(const char *text) {
1457 return textnw(text, strlen(text)) + dc.font.height;
1458 }
1459
1460 void
1461 tile(void) {
1462 int x, y, h, w;
1463 unsigned int i, n;
1464 Client *c;
1465
1466 for(n = 0, c = nextunfloating(clients); c; c = nextunfloating(c->next), n++);
1467 if(n == 0)
1468 return;
1469
1470 /* master */
1471 c = nextunfloating(clients);
1472
1473 if(n == 1)
1474 tileresize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
1475 else
1476 tileresize(c, mx, my, mw - 2 * c->bw, mh - 2 * c->bw);
1477
1478 if(--n == 0)
1479 return;
1480
1481 /* tile stack */
1482 x = (tx > c->x + c->w) ? c->x + c->w + 2 * c->bw : tw;
1483 y = ty;
1484 w = (tx > c->x + c->w) ? wx + ww - x : tw;
1485 h = th / n;
1486 if(h < bh)
1487 h = th;
1488
1489 for(i = 0, c = nextunfloating(c->next); c; c = nextunfloating(c->next), i++) {
1490 if(i + 1 == n) /* remainder */
1491 tileresize(c, x, y, w - 2 * c->bw, (ty + th) - y - 2 * c->bw);
1492 else
1493 tileresize(c, x, y, w - 2 * c->bw, h - 2 * c->bw);
1494 if(h != th)
1495 y = c->y + c->h + 2 * c->bw;
1496 }
1497 }
1498
1499 void
1500 tileresize(Client *c, int x, int y, int w, int h) {
1501 resize(c, x, y, w, h, resizehints);
1502 if(resizehints && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
1503 /* client doesn't accept size constraints */
1504 resize(c, x, y, w, h, False);
1505 }
1506
1507 void
1508 togglebar(const void *arg) {
1509 showbar = !showbar;
1510 updategeom();
1511 updatebar();
1512 arrange();
1513 }
1514
1515 void
1516 togglefloating(const void *arg) {
1517 if(!sel)
1518 return;
1519 sel->isfloating = !sel->isfloating;
1520 if(sel->isfloating)
1521 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1522 arrange();
1523 }
1524
1525 void
1526 togglelayout(const void *arg) {
1527 unsigned int i;
1528
1529 if(!arg) {
1530 if(++lt == &layouts[LENGTH(layouts)])
1531 lt = &layouts[0];
1532 }
1533 else {
1534 for(i = 0; i < LENGTH(layouts); i++)
1535 if(!strcmp((char *)arg, layouts[i].symbol))
1536 break;
1537 if(i == LENGTH(layouts))
1538 return;
1539 lt = &layouts[i];
1540 }
1541 if(sel)
1542 arrange();
1543 else
1544 drawbar();
1545 }
1546
1547 void
1548 toggletag(const void *arg) {
1549 int i, m = *(int *)arg;
1550 for(i = 0; i < sizeof(int) * 8; i++)
1551 fputc(m & 1 << i ? '1' : '0', stdout);
1552 puts("");
1553 for(i = 0; i < sizeof(int) * 8; i++)
1554 fputc(TAGMASK & 1 << i ? '1' : '0', stdout);
1555 puts("aaa");
1556
1557 if(sel && (sel->tags ^ ((*(int *)arg) & TAGMASK))) {
1558 sel->tags ^= (*(int *)arg) & TAGMASK;
1559 arrange();
1560 }
1561 }
1562
1563 void
1564 toggleview(const void *arg) {
1565 if((tagset[seltags] ^ ((*(int *)arg) & TAGMASK))) {
1566 tagset[seltags] ^= (*(int *)arg) & TAGMASK;
1567 arrange();
1568 }
1569 }
1570
1571 void
1572 unban(Client *c) {
1573 if(!c->isbanned)
1574 return;
1575 XMoveWindow(dpy, c->win, c->x, c->y);
1576 c->isbanned = False;
1577 }
1578
1579 void
1580 unmanage(Client *c) {
1581 XWindowChanges wc;
1582
1583 wc.border_width = c->oldbw;
1584 /* The server grab construct avoids race conditions. */
1585 XGrabServer(dpy);
1586 XSetErrorHandler(xerrordummy);
1587 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1588 detach(c);
1589 detachstack(c);
1590 if(sel == c)
1591 focus(NULL);
1592 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1593 setclientstate(c, WithdrawnState);
1594 free(c);
1595 XSync(dpy, False);
1596 XSetErrorHandler(xerror);
1597 XUngrabServer(dpy);
1598 arrange();
1599 }
1600
1601 void
1602 unmapnotify(XEvent *e) {
1603 Client *c;
1604 XUnmapEvent *ev = &e->xunmap;
1605
1606 if((c = getclient(ev->window)))
1607 unmanage(c);
1608 }
1609
1610 void
1611 updatebar(void) {
1612 if(dc.drawable != 0)
1613 XFreePixmap(dpy, dc.drawable);
1614 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1615 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1616 }
1617
1618 void
1619 updategeom(void) {
1620 int i;
1621 #ifdef XINERAMA
1622 XineramaScreenInfo *info = NULL;
1623
1624 /* window area geometry */
1625 if(XineramaIsActive(dpy)) {
1626 info = XineramaQueryScreens(dpy, &i);
1627 wx = info[0].x_org;
1628 wy = showbar && topbar ? info[0].y_org + bh : info[0].y_org;
1629 ww = info[0].width;
1630 wh = showbar ? info[0].height - bh : info[0].height;
1631 XFree(info);
1632 }
1633 else
1634 #endif
1635 {
1636 wx = sx;
1637 wy = showbar && topbar ? sy + bh : sy;
1638 ww = sw;
1639 wh = showbar ? sh - bh : sh;
1640 }
1641
1642 /* bar geometry */
1643 bx = wx;
1644 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1645 bw = ww;
1646
1647 /* update layout geometries */
1648 for(i = 0; i < LENGTH(layouts); i++)
1649 if(layouts[i].updategeom)
1650 layouts[i].updategeom();
1651 }
1652
1653 void
1654 updatesizehints(Client *c) {
1655 long msize;
1656 XSizeHints size;
1657
1658 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1659 size.flags = PSize;
1660 c->flags = size.flags;
1661 if(c->flags & PBaseSize) {
1662 c->basew = size.base_width;
1663 c->baseh = size.base_height;
1664 }
1665 else if(c->flags & PMinSize) {
1666 c->basew = size.min_width;
1667 c->baseh = size.min_height;
1668 }
1669 else
1670 c->basew = c->baseh = 0;
1671 if(c->flags & PResizeInc) {
1672 c->incw = size.width_inc;
1673 c->inch = size.height_inc;
1674 }
1675 else
1676 c->incw = c->inch = 0;
1677 if(c->flags & PMaxSize) {
1678 c->maxw = size.max_width;
1679 c->maxh = size.max_height;
1680 }
1681 else
1682 c->maxw = c->maxh = 0;
1683 if(c->flags & PMinSize) {
1684 c->minw = size.min_width;
1685 c->minh = size.min_height;
1686 }
1687 else if(c->flags & PBaseSize) {
1688 c->minw = size.base_width;
1689 c->minh = size.base_height;
1690 }
1691 else
1692 c->minw = c->minh = 0;
1693 if(c->flags & PAspect) {
1694 c->minax = size.min_aspect.x;
1695 c->maxax = size.max_aspect.x;
1696 c->minay = size.min_aspect.y;
1697 c->maxay = size.max_aspect.y;
1698 }
1699 else
1700 c->minax = c->maxax = c->minay = c->maxay = 0;
1701 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1702 && c->maxw == c->minw && c->maxh == c->minh);
1703 }
1704
1705 void
1706 updatetilegeom(void) {
1707 /* master area geometry */
1708 mx = wx;
1709 my = wy;
1710 mw = mfact * ww;
1711 mh = wh;
1712
1713 /* tile area geometry */
1714 tx = mx + mw;
1715 ty = wy;
1716 tw = ww - mw;
1717 th = wh;
1718 }
1719
1720 void
1721 updatetitle(Client *c) {
1722 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1723 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1724 }
1725
1726 void
1727 updatewmhints(Client *c) {
1728 XWMHints *wmh;
1729
1730 if((wmh = XGetWMHints(dpy, c->win))) {
1731 if(c == sel)
1732 sel->isurgent = False;
1733 else
1734 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1735 XFree(wmh);
1736 }
1737 }
1738
1739 void
1740 view(const void *arg) {
1741 if(*(int *)arg & TAGMASK) {
1742 seltags ^= 1; /* toggle sel tagset */
1743 tagset[seltags] = *(int *)arg & TAGMASK;
1744 arrange();
1745 }
1746 }
1747
1748 void
1749 viewprevtag(const void *arg) {
1750 seltags ^= 1; /* toggle sel tagset */
1751 arrange();
1752 }
1753
1754 /* There's no way to check accesses to destroyed windows, thus those cases are
1755 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1756 * default error handler, which may call exit. */
1757 int
1758 xerror(Display *dpy, XErrorEvent *ee) {
1759 if(ee->error_code == BadWindow
1760 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1761 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1762 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1763 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1764 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1765 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1766 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1767 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1768 return 0;
1769 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1770 ee->request_code, ee->error_code);
1771 return xerrorxlib(dpy, ee); /* may call exit */
1772 }
1773
1774 int
1775 xerrordummy(Display *dpy, XErrorEvent *ee) {
1776 return 0;
1777 }
1778
1779 /* Startup Error handler to check if another window manager
1780 * is already running. */
1781 int
1782 xerrorstart(Display *dpy, XErrorEvent *ee) {
1783 otherwm = True;
1784 return -1;
1785 }
1786
1787 void
1788 zoom(const void *arg) {
1789 Client *c = sel;
1790
1791 if(c == nextunfloating(clients))
1792 if(!c || !(c = nextunfloating(c->next)))
1793 return;
1794 if(lt->arrange == tile && !sel->isfloating) {
1795 detach(c);
1796 attach(c);
1797 focus(c);
1798 }
1799 arrange();
1800 }
1801
1802 int
1803 main(int argc, char *argv[]) {
1804 if(argc == 2 && !strcmp("-v", argv[1]))
1805 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1806 else if(argc != 1)
1807 eprint("usage: dwm [-v]\n");
1808
1809 setlocale(LC_CTYPE, "");
1810 if(!(dpy = XOpenDisplay(0)))
1811 eprint("dwm: cannot open display\n");
1812
1813 checkotherwm();
1814 setup();
1815 scan();
1816 run();
1817 cleanup();
1818
1819 XCloseDisplay(dpy);
1820 return 0;
1821 }