Xinqi Bao's Git

projects / dwm.git / blob


f83e800a7d86d8e2f7a6ef0332ba1e35a1676636
[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 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
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define LENGTH(x) (sizeof x / sizeof x[0])
47 #define MAXTAGLEN 16
48 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
49 #define DEFGEOM(GEONAME,BX,BY,BW,WX,WY,WW,WH,MX,MY,MW,MH,TX,TY,TW,TH,MOX,MOY,MOW,MOH) \
50 void GEONAME(void) { \
51 bx = (BX); by = (BY); bw = (BW); \
52 wx = (WX); wy = (WY); ww = (WW); wh = (WH); \
53 mx = (MX); my = (MY); mw = (MW); mh = (MH); \
54 tx = (TX); ty = (TY); tw = (TW); th = (TH); \
55 mox = (MOX); moy = (MOY); mow = (MOW); moh = (MOH); \
56 }
57
58 /* enums */
59 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
60 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
61 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
62 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
63
64 /* typedefs */
65 typedef struct Client Client;
66 struct Client {
67 char name[256];
68 int x, y, w, h;
69 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
70 int minax, maxax, minay, maxay;
71 long flags;
72 unsigned int border, oldborder;
73 Bool isbanned, isfixed, isfloating, isurgent;
74 Bool *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 unsigned long norm[ColLast];
84 unsigned long 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 const char *symbol;
98 void (*apply)(void);
99 } Geom;
100
101 typedef struct {
102 unsigned long mod;
103 KeySym keysym;
104 void (*func)(const char *arg);
105 const char *arg;
106 } Key;
107
108 typedef struct {
109 const char *symbol;
110 void (*arrange)(void);
111 Bool isfloating;
112 } Layout;
113
114 typedef struct {
115 const char *class;
116 const char *instance;
117 const char *title;
118 const char *tag;
119 Bool isfloating;
120 } Rule;
121
122 /* function declarations */
123 void applyrules(Client *c);
124 void arrange(void);
125 void attach(Client *c);
126 void attachstack(Client *c);
127 void ban(Client *c);
128 void buttonpress(XEvent *e);
129 void checkotherwm(void);
130 void cleanup(void);
131 void configure(Client *c);
132 void configurenotify(XEvent *e);
133 void configurerequest(XEvent *e);
134 unsigned int counttiled(void);
135 void destroynotify(XEvent *e);
136 void detach(Client *c);
137 void detachstack(Client *c);
138 void drawbar(void);
139 void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
140 void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
141 void *emallocz(unsigned int size);
142 void enternotify(XEvent *e);
143 void eprint(const char *errstr, ...);
144 void expose(XEvent *e);
145 void floating(void); /* default floating layout */
146 void focus(Client *c);
147 void focusin(XEvent *e);
148 void focusnext(const char *arg);
149 void focusprev(const char *arg);
150 Client *getclient(Window w);
151 unsigned long getcolor(const char *colstr);
152 long getstate(Window w);
153 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
154 void grabbuttons(Client *c, Bool focused);
155 void grabkeys(void);
156 unsigned int idxoftag(const char *t);
157 void initfont(const char *fontstr);
158 Bool isoccupied(unsigned int t);
159 Bool isprotodel(Client *c);
160 Bool isurgent(unsigned int t);
161 Bool isvisible(Client *c);
162 void keypress(XEvent *e);
163 void killclient(const char *arg);
164 void manage(Window w, XWindowAttributes *wa);
165 void mappingnotify(XEvent *e);
166 void maprequest(XEvent *e);
167 void monocle(void);
168 void movemouse(Client *c);
169 Client *nexttiled(Client *c);
170 void propertynotify(XEvent *e);
171 void quit(const char *arg);
172 void reapply(const char *arg);
173 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
174 void resizemouse(Client *c);
175 void restack(void);
176 void run(void);
177 void scan(void);
178 void setclientstate(Client *c, long state);
179 void setgeom(const char *arg);
180 void setlayout(const char *arg);
181 void setup(void);
182 void spawn(const char *arg);
183 void tag(const char *arg);
184 unsigned int textnw(const char *text, unsigned int len);
185 unsigned int textw(const char *text);
186 void tileh(void);
187 void tilehstack(unsigned int n);
188 Client *tilemaster(unsigned int n);
189 void tileresize(Client *c, int x, int y, int w, int h);
190 void tilev(void);
191 void tilevstack(unsigned int n);
192 void togglefloating(const char *arg);
193 void toggletag(const char *arg);
194 void toggleview(const char *arg);
195 void unban(Client *c);
196 void unmanage(Client *c);
197 void unmapnotify(XEvent *e);
198 void updatebarpos(void);
199 void updatesizehints(Client *c);
200 void updatetitle(Client *c);
201 void updatewmhints(Client *c);
202 void view(const char *arg);
203 void viewprevtag(const char *arg); /* views previous selected tags */
204 int xerror(Display *dpy, XErrorEvent *ee);
205 int xerrordummy(Display *dpy, XErrorEvent *ee);
206 int xerrorstart(Display *dpy, XErrorEvent *ee);
207 void zoom(const char *arg);
208
209 /* variables */
210 char stext[256], buf[256];
211 int screen, sx, sy, sw, sh;
212 int (*xerrorxlib)(Display *, XErrorEvent *);
213 int bx, by, bw, bh, blw, mx, my, mw, mh, mox, moy, mow, moh, tx, ty, tw, th, wx, wy, ww, wh;
214 unsigned int numlockmask = 0;
215 void (*handler[LASTEvent]) (XEvent *) = {
216 [ButtonPress] = buttonpress,
217 [ConfigureRequest] = configurerequest,
218 [ConfigureNotify] = configurenotify,
219 [DestroyNotify] = destroynotify,
220 [EnterNotify] = enternotify,
221 [Expose] = expose,
222 [FocusIn] = focusin,
223 [KeyPress] = keypress,
224 [MappingNotify] = mappingnotify,
225 [MapRequest] = maprequest,
226 [PropertyNotify] = propertynotify,
227 [UnmapNotify] = unmapnotify
228 };
229 Atom wmatom[WMLast], netatom[NetLast];
230 Bool otherwm, readin;
231 Bool running = True;
232 Bool *prevtags;
233 Bool *seltags;
234 Client *clients = NULL;
235 Client *sel = NULL;
236 Client *stack = NULL;
237 Cursor cursor[CurLast];
238 Display *dpy;
239 DC dc = {0};
240 Geom *geom = NULL;
241 Layout *lt = NULL;
242 Window root, barwin;
243
244 /* configuration, allows nested code to access above variables */
245 #include "config.h"
246 #define TAGSZ (LENGTH(tags) * sizeof(Bool))
247 static Bool tmp[LENGTH(tags)];
248
249 /* function implementations */
250
251 void
252 applyrules(Client *c) {
253 unsigned int i;
254 Bool matched = False;
255 Rule *r;
256 XClassHint ch = { 0 };
257
258 /* rule matching */
259 XGetClassHint(dpy, c->win, &ch);
260 for(i = 0; i < LENGTH(rules); i++) {
261 r = &rules[i];
262 if(strstr(c->name, r->title)
263 || (ch.res_class && r->class && strstr(ch.res_class, r->class))
264 || (ch.res_name && r->instance && strstr(ch.res_name, r->instance)))
265 {
266 c->isfloating = r->isfloating;
267 if(r->tag) {
268 c->tags[idxoftag(r->tag)] = True;
269 matched = True;
270 }
271 }
272 }
273 if(ch.res_class)
274 XFree(ch.res_class);
275 if(ch.res_name)
276 XFree(ch.res_name);
277 if(!matched)
278 memcpy(c->tags, seltags, TAGSZ);
279 }
280
281 void
282 arrange(void) {
283 Client *c;
284
285 for(c = clients; c; c = c->next)
286 if(isvisible(c))
287 unban(c);
288 else
289 ban(c);
290
291 focus(NULL);
292 lt->arrange();
293 restack();
294 }
295
296 void
297 attach(Client *c) {
298 if(clients)
299 clients->prev = c;
300 c->next = clients;
301 clients = c;
302 }
303
304 void
305 attachstack(Client *c) {
306 c->snext = stack;
307 stack = c;
308 }
309
310 void
311 ban(Client *c) {
312 if(c->isbanned)
313 return;
314 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
315 c->isbanned = True;
316 }
317
318 void
319 buttonpress(XEvent *e) {
320 unsigned int i, x;
321 Client *c;
322 XButtonPressedEvent *ev = &e->xbutton;
323
324 if(ev->window == barwin) {
325 x = 0;
326 for(i = 0; i < LENGTH(tags); i++) {
327 x += textw(tags[i]);
328 if(ev->x < x) {
329 if(ev->button == Button1) {
330 if(ev->state & MODKEY)
331 tag(tags[i]);
332 else
333 view(tags[i]);
334 }
335 else if(ev->button == Button3) {
336 if(ev->state & MODKEY)
337 toggletag(tags[i]);
338 else
339 toggleview(tags[i]);
340 }
341 return;
342 }
343 }
344 }
345 else if((c = getclient(ev->window))) {
346 focus(c);
347 if(CLEANMASK(ev->state) != MODKEY)
348 return;
349 if(ev->button == Button1) {
350 restack();
351 movemouse(c);
352 }
353 else if(ev->button == Button2) {
354 if((floating != lt->arrange) && c->isfloating)
355 togglefloating(NULL);
356 else
357 zoom(NULL);
358 }
359 else if(ev->button == Button3 && !c->isfixed) {
360 restack();
361 resizemouse(c);
362 }
363 }
364 }
365
366 void
367 checkotherwm(void) {
368 otherwm = False;
369 XSetErrorHandler(xerrorstart);
370
371 /* this causes an error if some other window manager is running */
372 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
373 XSync(dpy, False);
374 if(otherwm)
375 eprint("dwm: another window manager is already running\n");
376 XSync(dpy, False);
377 XSetErrorHandler(NULL);
378 xerrorxlib = XSetErrorHandler(xerror);
379 XSync(dpy, False);
380 }
381
382 void
383 cleanup(void) {
384 close(STDIN_FILENO);
385 while(stack) {
386 unban(stack);
387 unmanage(stack);
388 }
389 if(dc.font.set)
390 XFreeFontSet(dpy, dc.font.set);
391 else
392 XFreeFont(dpy, dc.font.xfont);
393 XUngrabKey(dpy, AnyKey, AnyModifier, root);
394 XFreePixmap(dpy, dc.drawable);
395 XFreeGC(dpy, dc.gc);
396 XFreeCursor(dpy, cursor[CurNormal]);
397 XFreeCursor(dpy, cursor[CurResize]);
398 XFreeCursor(dpy, cursor[CurMove]);
399 XDestroyWindow(dpy, barwin);
400 XSync(dpy, False);
401 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
402 }
403
404 void
405 configure(Client *c) {
406 XConfigureEvent ce;
407
408 ce.type = ConfigureNotify;
409 ce.display = dpy;
410 ce.event = c->win;
411 ce.window = c->win;
412 ce.x = c->x;
413 ce.y = c->y;
414 ce.width = c->w;
415 ce.height = c->h;
416 ce.border_width = c->border;
417 ce.above = None;
418 ce.override_redirect = False;
419 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
420 }
421
422 void
423 configurenotify(XEvent *e) {
424 XConfigureEvent *ev = &e->xconfigure;
425
426 if(ev->window == root && (ev->width != sw || ev->height != sh))
427 setgeom(NULL);
428 }
429
430 void
431 configurerequest(XEvent *e) {
432 Client *c;
433 XConfigureRequestEvent *ev = &e->xconfigurerequest;
434 XWindowChanges wc;
435
436 if((c = getclient(ev->window))) {
437 if(ev->value_mask & CWBorderWidth)
438 c->border = ev->border_width;
439 if(c->isfixed || c->isfloating || lt->isfloating) {
440 if(ev->value_mask & CWX)
441 c->x = sx + ev->x;
442 if(ev->value_mask & CWY)
443 c->y = sy + ev->y;
444 if(ev->value_mask & CWWidth)
445 c->w = ev->width;
446 if(ev->value_mask & CWHeight)
447 c->h = ev->height;
448 if((c->x - sx + c->w) > sw && c->isfloating)
449 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
450 if((c->y - sy + c->h) > sh && c->isfloating)
451 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
452 if((ev->value_mask & (CWX|CWY))
453 && !(ev->value_mask & (CWWidth|CWHeight)))
454 configure(c);
455 if(isvisible(c))
456 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
457 }
458 else
459 configure(c);
460 }
461 else {
462 wc.x = ev->x;
463 wc.y = ev->y;
464 wc.width = ev->width;
465 wc.height = ev->height;
466 wc.border_width = ev->border_width;
467 wc.sibling = ev->above;
468 wc.stack_mode = ev->detail;
469 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
470 }
471 XSync(dpy, False);
472 }
473
474 unsigned int
475 counttiled(void) {
476 unsigned int n;
477 Client *c;
478
479 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
480 return n;
481 }
482
483 void
484 destroynotify(XEvent *e) {
485 Client *c;
486 XDestroyWindowEvent *ev = &e->xdestroywindow;
487
488 if((c = getclient(ev->window)))
489 unmanage(c);
490 }
491
492 void
493 detach(Client *c) {
494 if(c->prev)
495 c->prev->next = c->next;
496 if(c->next)
497 c->next->prev = c->prev;
498 if(c == clients)
499 clients = c->next;
500 c->next = c->prev = NULL;
501 }
502
503 void
504 detachstack(Client *c) {
505 Client **tc;
506
507 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
508 *tc = c->snext;
509 }
510
511 void
512 drawbar(void) {
513 int i, x;
514 Client *c;
515
516 dc.x = 0;
517 for(c = stack; c && !isvisible(c); c = c->snext);
518 for(i = 0; i < LENGTH(tags); i++) {
519 dc.w = textw(tags[i]);
520 if(seltags[i]) {
521 drawtext(tags[i], dc.sel, isurgent(i));
522 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
523 }
524 else {
525 drawtext(tags[i], dc.norm, isurgent(i));
526 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
527 }
528 dc.x += dc.w;
529 }
530 dc.w = blw;
531 drawtext(lt->symbol, dc.norm, False);
532 x = dc.x + dc.w;
533 dc.w = textw(stext);
534 dc.x = bw - dc.w;
535 if(dc.x < x) {
536 dc.x = x;
537 dc.w = bw - x;
538 }
539 drawtext(stext, dc.norm, False);
540 if((dc.w = dc.x - x) > bh) {
541 dc.x = x;
542 if(c) {
543 drawtext(c->name, dc.sel, False);
544 drawsquare(False, c->isfloating, False, dc.sel);
545 }
546 else
547 drawtext(NULL, dc.norm, False);
548 }
549 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
550 XSync(dpy, False);
551 }
552
553 void
554 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
555 int x;
556 XGCValues gcv;
557 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
558
559 gcv.foreground = col[invert ? ColBG : ColFG];
560 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
561 x = (dc.font.ascent + dc.font.descent + 2) / 4;
562 r.x = dc.x + 1;
563 r.y = dc.y + 1;
564 if(filled) {
565 r.width = r.height = x + 1;
566 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
567 }
568 else if(empty) {
569 r.width = r.height = x;
570 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
571 }
572 }
573
574 void
575 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
576 int x, y, w, h;
577 unsigned int len, olen;
578 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
579
580 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
581 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
582 if(!text)
583 return;
584 w = 0;
585 olen = len = strlen(text);
586 if(len >= sizeof buf)
587 len = sizeof buf - 1;
588 memcpy(buf, text, len);
589 buf[len] = 0;
590 h = dc.font.ascent + dc.font.descent;
591 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
592 x = dc.x + (h / 2);
593 /* shorten text if necessary */
594 while(len && (w = textnw(buf, len)) > dc.w - h)
595 buf[--len] = 0;
596 if(len < olen) {
597 if(len > 1)
598 buf[len - 1] = '.';
599 if(len > 2)
600 buf[len - 2] = '.';
601 if(len > 3)
602 buf[len - 3] = '.';
603 }
604 if(w > dc.w)
605 return; /* too long */
606 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
607 if(dc.font.set)
608 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
609 else
610 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
611 }
612
613 void *
614 emallocz(unsigned int size) {
615 void *res = calloc(1, size);
616
617 if(!res)
618 eprint("fatal: could not malloc() %u bytes\n", size);
619 return res;
620 }
621
622 void
623 enternotify(XEvent *e) {
624 Client *c;
625 XCrossingEvent *ev = &e->xcrossing;
626
627 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
628 return;
629 if((c = getclient(ev->window)))
630 focus(c);
631 else
632 focus(NULL);
633 }
634
635 void
636 eprint(const char *errstr, ...) {
637 va_list ap;
638
639 va_start(ap, errstr);
640 vfprintf(stderr, errstr, ap);
641 va_end(ap);
642 exit(EXIT_FAILURE);
643 }
644
645 void
646 expose(XEvent *e) {
647 XExposeEvent *ev = &e->xexpose;
648
649 if(ev->count == 0 && (ev->window == barwin))
650 drawbar();
651 }
652
653 void
654 floating(void) { /* default floating layout */
655 Client *c;
656
657 for(c = clients; c; c = c->next)
658 if(isvisible(c))
659 resize(c, c->x, c->y, c->w, c->h, True);
660 }
661
662 void
663 focus(Client *c) {
664 if(!c || (c && !isvisible(c)))
665 for(c = stack; c && !isvisible(c); c = c->snext);
666 if(sel && sel != c) {
667 grabbuttons(sel, False);
668 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
669 }
670 if(c) {
671 detachstack(c);
672 attachstack(c);
673 grabbuttons(c, True);
674 }
675 sel = c;
676 if(c) {
677 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
678 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
679 }
680 else
681 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
682 drawbar();
683 }
684
685 void
686 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
687 XFocusChangeEvent *ev = &e->xfocus;
688
689 if(sel && ev->window != sel->win)
690 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
691 }
692
693 void
694 focusnext(const char *arg) {
695 Client *c;
696
697 if(!sel)
698 return;
699 for(c = sel->next; c && !isvisible(c); c = c->next);
700 if(!c)
701 for(c = clients; c && !isvisible(c); c = c->next);
702 if(c) {
703 focus(c);
704 restack();
705 }
706 }
707
708 void
709 focusprev(const char *arg) {
710 Client *c;
711
712 if(!sel)
713 return;
714 for(c = sel->prev; c && !isvisible(c); c = c->prev);
715 if(!c) {
716 for(c = clients; c && c->next; c = c->next);
717 for(; c && !isvisible(c); c = c->prev);
718 }
719 if(c) {
720 focus(c);
721 restack();
722 }
723 }
724
725 Client *
726 getclient(Window w) {
727 Client *c;
728
729 for(c = clients; c && c->win != w; c = c->next);
730 return c;
731 }
732
733 unsigned long
734 getcolor(const char *colstr) {
735 Colormap cmap = DefaultColormap(dpy, screen);
736 XColor color;
737
738 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
739 eprint("error, cannot allocate color '%s'\n", colstr);
740 return color.pixel;
741 }
742
743 long
744 getstate(Window w) {
745 int format, status;
746 long result = -1;
747 unsigned char *p = NULL;
748 unsigned long n, extra;
749 Atom real;
750
751 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
752 &real, &format, &n, &extra, (unsigned char **)&p);
753 if(status != Success)
754 return -1;
755 if(n != 0)
756 result = *p;
757 XFree(p);
758 return result;
759 }
760
761 Bool
762 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
763 char **list = NULL;
764 int n;
765 XTextProperty name;
766
767 if(!text || size == 0)
768 return False;
769 text[0] = '\0';
770 XGetTextProperty(dpy, w, &name, atom);
771 if(!name.nitems)
772 return False;
773 if(name.encoding == XA_STRING)
774 strncpy(text, (char *)name.value, size - 1);
775 else {
776 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
777 && n > 0 && *list) {
778 strncpy(text, *list, size - 1);
779 XFreeStringList(list);
780 }
781 }
782 text[size - 1] = '\0';
783 XFree(name.value);
784 return True;
785 }
786
787 void
788 grabbuttons(Client *c, Bool focused) {
789 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
790
791 if(focused) {
792 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
793 GrabModeAsync, GrabModeSync, None, None);
794 XGrabButton(dpy, Button1, MODKEY|LockMask, c->win, False, BUTTONMASK,
795 GrabModeAsync, GrabModeSync, None, None);
796 XGrabButton(dpy, Button1, MODKEY|numlockmask, c->win, False, BUTTONMASK,
797 GrabModeAsync, GrabModeSync, None, None);
798 XGrabButton(dpy, Button1, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
799 GrabModeAsync, GrabModeSync, None, None);
800
801 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
802 GrabModeAsync, GrabModeSync, None, None);
803 XGrabButton(dpy, Button2, MODKEY|LockMask, c->win, False, BUTTONMASK,
804 GrabModeAsync, GrabModeSync, None, None);
805 XGrabButton(dpy, Button2, MODKEY|numlockmask, c->win, False, BUTTONMASK,
806 GrabModeAsync, GrabModeSync, None, None);
807 XGrabButton(dpy, Button2, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
808 GrabModeAsync, GrabModeSync, None, None);
809
810 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
811 GrabModeAsync, GrabModeSync, None, None);
812 XGrabButton(dpy, Button3, MODKEY|LockMask, c->win, False, BUTTONMASK,
813 GrabModeAsync, GrabModeSync, None, None);
814 XGrabButton(dpy, Button3, MODKEY|numlockmask, c->win, False, BUTTONMASK,
815 GrabModeAsync, GrabModeSync, None, None);
816 XGrabButton(dpy, Button3, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
817 GrabModeAsync, GrabModeSync, None, None);
818 }
819 else
820 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
821 GrabModeAsync, GrabModeSync, None, None);
822 }
823
824 void
825 grabkeys(void) {
826 unsigned int i, j;
827 KeyCode code;
828 XModifierKeymap *modmap;
829
830 /* init modifier map */
831 modmap = XGetModifierMapping(dpy);
832 for(i = 0; i < 8; i++)
833 for(j = 0; j < modmap->max_keypermod; j++) {
834 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
835 numlockmask = (1 << i);
836 }
837 XFreeModifiermap(modmap);
838
839 XUngrabKey(dpy, AnyKey, AnyModifier, root);
840 for(i = 0; i < LENGTH(keys); i++) {
841 code = XKeysymToKeycode(dpy, keys[i].keysym);
842 XGrabKey(dpy, code, keys[i].mod, root, True,
843 GrabModeAsync, GrabModeAsync);
844 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
845 GrabModeAsync, GrabModeAsync);
846 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
847 GrabModeAsync, GrabModeAsync);
848 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
849 GrabModeAsync, GrabModeAsync);
850 }
851 }
852
853 unsigned int
854 idxoftag(const char *t) {
855 unsigned int i;
856
857 for(i = 0; (i < LENGTH(tags)) && (tags[i] != t); i++);
858 return (i < LENGTH(tags)) ? i : 0;
859 }
860
861 void
862 initfont(const char *fontstr) {
863 char *def, **missing;
864 int i, n;
865
866 missing = NULL;
867 if(dc.font.set)
868 XFreeFontSet(dpy, dc.font.set);
869 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
870 if(missing) {
871 while(n--)
872 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
873 XFreeStringList(missing);
874 }
875 if(dc.font.set) {
876 XFontSetExtents *font_extents;
877 XFontStruct **xfonts;
878 char **font_names;
879 dc.font.ascent = dc.font.descent = 0;
880 font_extents = XExtentsOfFontSet(dc.font.set);
881 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
882 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
883 if(dc.font.ascent < (*xfonts)->ascent)
884 dc.font.ascent = (*xfonts)->ascent;
885 if(dc.font.descent < (*xfonts)->descent)
886 dc.font.descent = (*xfonts)->descent;
887 xfonts++;
888 }
889 }
890 else {
891 if(dc.font.xfont)
892 XFreeFont(dpy, dc.font.xfont);
893 dc.font.xfont = NULL;
894 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
895 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
896 eprint("error, cannot load font: '%s'\n", fontstr);
897 dc.font.ascent = dc.font.xfont->ascent;
898 dc.font.descent = dc.font.xfont->descent;
899 }
900 dc.font.height = dc.font.ascent + dc.font.descent;
901 }
902
903 Bool
904 isoccupied(unsigned int t) {
905 Client *c;
906
907 for(c = clients; c; c = c->next)
908 if(c->tags[t])
909 return True;
910 return False;
911 }
912
913 Bool
914 isprotodel(Client *c) {
915 int i, n;
916 Atom *protocols;
917 Bool ret = False;
918
919 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
920 for(i = 0; !ret && i < n; i++)
921 if(protocols[i] == wmatom[WMDelete])
922 ret = True;
923 XFree(protocols);
924 }
925 return ret;
926 }
927
928 Bool
929 isurgent(unsigned int t) {
930 Client *c;
931
932 for(c = clients; c; c = c->next)
933 if(c->isurgent && c->tags[t])
934 return True;
935 return False;
936 }
937
938 Bool
939 isvisible(Client *c) {
940 unsigned int i;
941
942 for(i = 0; i < LENGTH(tags); i++)
943 if(c->tags[i] && seltags[i])
944 return True;
945 return False;
946 }
947
948 void
949 keypress(XEvent *e) {
950 unsigned int i;
951 KeySym keysym;
952 XKeyEvent *ev;
953
954 ev = &e->xkey;
955 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
956 for(i = 0; i < LENGTH(keys); i++)
957 if(keysym == keys[i].keysym
958 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
959 {
960 if(keys[i].func)
961 keys[i].func(keys[i].arg);
962 }
963 }
964
965 void
966 killclient(const char *arg) {
967 XEvent ev;
968
969 if(!sel)
970 return;
971 if(isprotodel(sel)) {
972 ev.type = ClientMessage;
973 ev.xclient.window = sel->win;
974 ev.xclient.message_type = wmatom[WMProtocols];
975 ev.xclient.format = 32;
976 ev.xclient.data.l[0] = wmatom[WMDelete];
977 ev.xclient.data.l[1] = CurrentTime;
978 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
979 }
980 else
981 XKillClient(dpy, sel->win);
982 }
983
984 void
985 manage(Window w, XWindowAttributes *wa) {
986 Client *c, *t = NULL;
987 Status rettrans;
988 Window trans;
989 XWindowChanges wc;
990
991 c = emallocz(sizeof(Client));
992 c->tags = emallocz(TAGSZ);
993 c->win = w;
994
995 /* geometry */
996 c->x = wa->x;
997 c->y = wa->y;
998 c->w = wa->width;
999 c->h = wa->height;
1000 c->oldborder = wa->border_width;
1001 if(c->w == sw && c->h == sh) {
1002 c->x = sx;
1003 c->y = sy;
1004 c->border = wa->border_width;
1005 }
1006 else {
1007 if(c->x + c->w + 2 * c->border > wx + ww)
1008 c->x = wx + ww - c->w - 2 * c->border;
1009 if(c->y + c->h + 2 * c->border > wy + wh)
1010 c->y = wy + wh - c->h - 2 * c->border;
1011 if(c->x < wx)
1012 c->x = wx;
1013 if(c->y < wy)
1014 c->y = wy;
1015 c->border = BORDERPX;
1016 }
1017
1018 wc.border_width = c->border;
1019 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1020 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1021 configure(c); /* propagates border_width, if size doesn't change */
1022 updatesizehints(c);
1023 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1024 grabbuttons(c, False);
1025 updatetitle(c);
1026 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1027 for(t = clients; t && t->win != trans; t = t->next);
1028 if(t)
1029 memcpy(c->tags, t->tags, TAGSZ);
1030 else
1031 applyrules(c);
1032 if(!c->isfloating)
1033 c->isfloating = (rettrans == Success) || c->isfixed;
1034 attach(c);
1035 attachstack(c);
1036 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1037 ban(c);
1038 XMapWindow(dpy, c->win);
1039 setclientstate(c, NormalState);
1040 arrange();
1041 }
1042
1043 void
1044 mappingnotify(XEvent *e) {
1045 XMappingEvent *ev = &e->xmapping;
1046
1047 XRefreshKeyboardMapping(ev);
1048 if(ev->request == MappingKeyboard)
1049 grabkeys();
1050 }
1051
1052 void
1053 maprequest(XEvent *e) {
1054 static XWindowAttributes wa;
1055 XMapRequestEvent *ev = &e->xmaprequest;
1056
1057 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1058 return;
1059 if(wa.override_redirect)
1060 return;
1061 if(!getclient(ev->window))
1062 manage(ev->window, &wa);
1063 }
1064
1065 void
1066 monocle(void) {
1067 Client *c;
1068
1069 for(c = clients; c; c = c->next)
1070 if(isvisible(c))
1071 resize(c, mox, moy, mow, moh, RESIZEHINTS);
1072 }
1073
1074 void
1075 movemouse(Client *c) {
1076 int x1, y1, ocx, ocy, di, nx, ny;
1077 unsigned int dui;
1078 Window dummy;
1079 XEvent ev;
1080
1081 ocx = nx = c->x;
1082 ocy = ny = c->y;
1083 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1084 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1085 return;
1086 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1087 for(;;) {
1088 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1089 switch (ev.type) {
1090 case ButtonRelease:
1091 XUngrabPointer(dpy, CurrentTime);
1092 return;
1093 case ConfigureRequest:
1094 case Expose:
1095 case MapRequest:
1096 handler[ev.type](&ev);
1097 break;
1098 case MotionNotify:
1099 XSync(dpy, False);
1100 nx = ocx + (ev.xmotion.x - x1);
1101 ny = ocy + (ev.xmotion.y - y1);
1102 if(abs(wx - nx) < SNAP)
1103 nx = wx;
1104 else if(abs((wx + ww) - (nx + c->w + 2 * c->border)) < SNAP)
1105 nx = wx + ww - c->w - 2 * c->border;
1106 if(abs(wy - ny) < SNAP)
1107 ny = wy;
1108 else if(abs((wy + wh) - (ny + c->h + 2 * c->border)) < SNAP)
1109 ny = wy + wh - c->h - 2 * c->border;
1110 if(!c->isfloating && !lt->isfloating && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1111 togglefloating(NULL);
1112 if((lt->isfloating) || c->isfloating)
1113 resize(c, nx, ny, c->w, c->h, False);
1114 break;
1115 }
1116 }
1117 }
1118
1119 Client *
1120 nexttiled(Client *c) {
1121 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1122 return c;
1123 }
1124
1125 void
1126 propertynotify(XEvent *e) {
1127 Client *c;
1128 Window trans;
1129 XPropertyEvent *ev = &e->xproperty;
1130
1131 if(ev->state == PropertyDelete)
1132 return; /* ignore */
1133 if((c = getclient(ev->window))) {
1134 switch (ev->atom) {
1135 default: break;
1136 case XA_WM_TRANSIENT_FOR:
1137 XGetTransientForHint(dpy, c->win, &trans);
1138 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1139 arrange();
1140 break;
1141 case XA_WM_NORMAL_HINTS:
1142 updatesizehints(c);
1143 break;
1144 case XA_WM_HINTS:
1145 updatewmhints(c);
1146 drawbar();
1147 break;
1148 }
1149 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1150 updatetitle(c);
1151 if(c == sel)
1152 drawbar();
1153 }
1154 }
1155 }
1156
1157 void
1158 quit(const char *arg) {
1159 readin = running = False;
1160 }
1161
1162 void
1163 reapply(const char *arg) {
1164 static Bool zerotags[LENGTH(tags)] = { 0 };
1165 Client *c;
1166
1167 for(c = clients; c; c = c->next) {
1168 memcpy(c->tags, zerotags, sizeof zerotags);
1169 applyrules(c);
1170 }
1171 arrange();
1172 }
1173
1174 void
1175 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1176 XWindowChanges wc;
1177
1178 if(sizehints) {
1179 /* set minimum possible */
1180 if (w < 1)
1181 w = 1;
1182 if (h < 1)
1183 h = 1;
1184
1185 /* temporarily remove base dimensions */
1186 w -= c->basew;
1187 h -= c->baseh;
1188
1189 /* adjust for aspect limits */
1190 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1191 if (w * c->maxay > h * c->maxax)
1192 w = h * c->maxax / c->maxay;
1193 else if (w * c->minay < h * c->minax)
1194 h = w * c->minay / c->minax;
1195 }
1196
1197 /* adjust for increment value */
1198 if(c->incw)
1199 w -= w % c->incw;
1200 if(c->inch)
1201 h -= h % c->inch;
1202
1203 /* restore base dimensions */
1204 w += c->basew;
1205 h += c->baseh;
1206
1207 if(c->minw > 0 && w < c->minw)
1208 w = c->minw;
1209 if(c->minh > 0 && h < c->minh)
1210 h = c->minh;
1211 if(c->maxw > 0 && w > c->maxw)
1212 w = c->maxw;
1213 if(c->maxh > 0 && h > c->maxh)
1214 h = c->maxh;
1215 }
1216 if(w <= 0 || h <= 0)
1217 return;
1218 if(x > sx + sw)
1219 x = sw - w - 2 * c->border;
1220 if(y > sy + sh)
1221 y = sh - h - 2 * c->border;
1222 if(x + w + 2 * c->border < sx)
1223 x = sx;
1224 if(y + h + 2 * c->border < sy)
1225 y = sy;
1226 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1227 c->x = wc.x = x;
1228 c->y = wc.y = y;
1229 c->w = wc.width = w;
1230 c->h = wc.height = h;
1231 wc.border_width = c->border;
1232 XConfigureWindow(dpy, c->win,
1233 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1234 configure(c);
1235 XSync(dpy, False);
1236 }
1237 }
1238
1239 void
1240 resizemouse(Client *c) {
1241 int ocx, ocy;
1242 int nw, nh;
1243 XEvent ev;
1244
1245 ocx = c->x;
1246 ocy = c->y;
1247 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1248 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1249 return;
1250 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1251 for(;;) {
1252 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1253 switch(ev.type) {
1254 case ButtonRelease:
1255 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1256 c->w + c->border - 1, c->h + c->border - 1);
1257 XUngrabPointer(dpy, CurrentTime);
1258 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1259 return;
1260 case ConfigureRequest:
1261 case Expose:
1262 case MapRequest:
1263 handler[ev.type](&ev);
1264 break;
1265 case MotionNotify:
1266 XSync(dpy, False);
1267 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1268 nw = 1;
1269 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1270 nh = 1;
1271 if(!c->isfloating && !lt->isfloating && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1272 togglefloating(NULL);
1273 if((lt->isfloating) || c->isfloating)
1274 resize(c, c->x, c->y, nw, nh, True);
1275 break;
1276 }
1277 }
1278 }
1279
1280 void
1281 restack(void) {
1282 Client *c;
1283 XEvent ev;
1284 XWindowChanges wc;
1285
1286 drawbar();
1287 if(!sel)
1288 return;
1289 if(sel->isfloating || lt->isfloating)
1290 XRaiseWindow(dpy, sel->win);
1291 if(!lt->isfloating) {
1292 wc.stack_mode = Below;
1293 wc.sibling = barwin;
1294 if(!sel->isfloating) {
1295 XConfigureWindow(dpy, sel->win, CWSibling|CWStackMode, &wc);
1296 wc.sibling = sel->win;
1297 }
1298 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1299 if(c == sel)
1300 continue;
1301 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1302 wc.sibling = c->win;
1303 }
1304 }
1305 XSync(dpy, False);
1306 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1307 }
1308
1309 void
1310 run(void) {
1311 char *p;
1312 char sbuf[sizeof stext];
1313 fd_set rd;
1314 int r, xfd;
1315 unsigned int len, offset;
1316 XEvent ev;
1317
1318 /* main event loop, also reads status text from stdin */
1319 XSync(dpy, False);
1320 xfd = ConnectionNumber(dpy);
1321 readin = True;
1322 offset = 0;
1323 len = sizeof stext - 1;
1324 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1325 while(running) {
1326 FD_ZERO(&rd);
1327 if(readin)
1328 FD_SET(STDIN_FILENO, &rd);
1329 FD_SET(xfd, &rd);
1330 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1331 if(errno == EINTR)
1332 continue;
1333 eprint("select failed\n");
1334 }
1335 if(FD_ISSET(STDIN_FILENO, &rd)) {
1336 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1337 case -1:
1338 strncpy(stext, strerror(errno), len);
1339 readin = False;
1340 break;
1341 case 0:
1342 strncpy(stext, "EOF", 4);
1343 readin = False;
1344 break;
1345 default:
1346 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1347 if(*p == '\n' || *p == '\0') {
1348 *p = '\0';
1349 strncpy(stext, sbuf, len);
1350 p += r - 1; /* p is sbuf + offset + r - 1 */
1351 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1352 offset = r;
1353 if(r)
1354 memmove(sbuf, p - r + 1, r);
1355 break;
1356 }
1357 break;
1358 }
1359 drawbar();
1360 }
1361 while(XPending(dpy)) {
1362 XNextEvent(dpy, &ev);
1363 if(handler[ev.type])
1364 (handler[ev.type])(&ev); /* call handler */
1365 }
1366 }
1367 }
1368
1369 void
1370 scan(void) {
1371 unsigned int i, num;
1372 Window *wins, d1, d2;
1373 XWindowAttributes wa;
1374
1375 wins = NULL;
1376 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1377 for(i = 0; i < num; i++) {
1378 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1379 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1380 continue;
1381 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1382 manage(wins[i], &wa);
1383 }
1384 for(i = 0; i < num; i++) { /* now the transients */
1385 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1386 continue;
1387 if(XGetTransientForHint(dpy, wins[i], &d1)
1388 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1389 manage(wins[i], &wa);
1390 }
1391 }
1392 if(wins)
1393 XFree(wins);
1394 }
1395
1396 void
1397 setclientstate(Client *c, long state) {
1398 long data[] = {state, None};
1399
1400 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1401 PropModeReplace, (unsigned char *)data, 2);
1402 }
1403
1404 void
1405 setgeom(const char *arg) {
1406 unsigned int i;
1407
1408 for(i = 0; arg && i < LENGTH(geoms); i++)
1409 if(!strcmp(geoms[i].symbol, arg))
1410 break;
1411 if(i == LENGTH(geoms))
1412 return;
1413 geom = &geoms[i];
1414 geom->apply();
1415 updatebarpos();
1416 arrange();
1417 }
1418
1419 void
1420 setlayout(const char *arg) {
1421 static Layout *revert = 0;
1422 unsigned int i;
1423
1424 if(!arg)
1425 return;
1426 for(i = 0; i < LENGTH(layouts); i++)
1427 if(!strcmp(arg, layouts[i].symbol))
1428 break;
1429 if(i == LENGTH(layouts))
1430 return;
1431 if(revert && &layouts[i] == lt)
1432 lt = revert;
1433 else {
1434 revert = lt;
1435 lt = &layouts[i];
1436 }
1437 if(sel)
1438 arrange();
1439 else
1440 drawbar();
1441 }
1442
1443 void
1444 setup(void) {
1445 unsigned int i;
1446 XSetWindowAttributes wa;
1447
1448 /* init screen */
1449 screen = DefaultScreen(dpy);
1450 root = RootWindow(dpy, screen);
1451 initfont(FONT);
1452
1453 /* apply default geometry */
1454 sx = 0;
1455 sy = 0;
1456 sw = DisplayWidth(dpy, screen);
1457 sh = DisplayHeight(dpy, screen);
1458 bh = dc.font.height + 2;
1459 geom = &geoms[0];
1460 geom->apply();
1461
1462 /* init atoms */
1463 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1464 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1465 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1466 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1467 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1468 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1469
1470 /* init cursors */
1471 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1472 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1473 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1474
1475 /* init appearance */
1476 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1477 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1478 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1479 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1480 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1481 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1482 initfont(FONT);
1483 dc.h = bh;
1484 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1485 dc.gc = XCreateGC(dpy, root, 0, 0);
1486 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1487 if(!dc.font.set)
1488 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1489
1490 /* init tags */
1491 seltags = emallocz(TAGSZ);
1492 prevtags = emallocz(TAGSZ);
1493 seltags[0] = prevtags[0] = True;
1494
1495 /* init layouts */
1496 lt = &layouts[0];
1497
1498 /* init bar */
1499 for(blw = i = 0; i < LENGTH(layouts); i++) {
1500 i = textw(layouts[i].symbol);
1501 if(i > blw)
1502 blw = i;
1503 }
1504
1505 wa.override_redirect = 1;
1506 wa.background_pixmap = ParentRelative;
1507 wa.event_mask = ButtonPressMask|ExposureMask;
1508
1509 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1510 CopyFromParent, DefaultVisual(dpy, screen),
1511 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1512 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1513 XMapRaised(dpy, barwin);
1514 strcpy(stext, "dwm-"VERSION);
1515 drawbar();
1516
1517 /* EWMH support per view */
1518 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1519 PropModeReplace, (unsigned char *) netatom, NetLast);
1520
1521 /* select for events */
1522 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1523 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1524 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1525 XSelectInput(dpy, root, wa.event_mask);
1526
1527
1528 /* grab keys */
1529 grabkeys();
1530 }
1531
1532 void
1533 spawn(const char *arg) {
1534 static char *shell = NULL;
1535
1536 if(!shell && !(shell = getenv("SHELL")))
1537 shell = "/bin/sh";
1538 if(!arg)
1539 return;
1540 /* The double-fork construct avoids zombie processes and keeps the code
1541 * clean from stupid signal handlers. */
1542 if(fork() == 0) {
1543 if(fork() == 0) {
1544 if(dpy)
1545 close(ConnectionNumber(dpy));
1546 setsid();
1547 execl(shell, shell, "-c", arg, (char *)NULL);
1548 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1549 perror(" failed");
1550 }
1551 exit(0);
1552 }
1553 wait(0);
1554 }
1555
1556 void
1557 tag(const char *arg) {
1558 unsigned int i;
1559
1560 if(!sel)
1561 return;
1562 for(i = 0; i < LENGTH(tags); i++)
1563 sel->tags[i] = (NULL == arg);
1564 sel->tags[idxoftag(arg)] = True;
1565 arrange();
1566 }
1567
1568 unsigned int
1569 textnw(const char *text, unsigned int len) {
1570 XRectangle r;
1571
1572 if(dc.font.set) {
1573 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1574 return r.width;
1575 }
1576 return XTextWidth(dc.font.xfont, text, len);
1577 }
1578
1579 unsigned int
1580 textw(const char *text) {
1581 return textnw(text, strlen(text)) + dc.font.height;
1582 }
1583
1584 void
1585 tileh(void) {
1586 int x, w;
1587 unsigned int i, n = counttiled();
1588 Client *c;
1589
1590 if(n == 0)
1591 return;
1592 c = tilemaster(n);
1593 if(--n == 0)
1594 return;
1595
1596 x = tx;
1597 w = tw / n;
1598 if(w < bh)
1599 w = tw;
1600
1601 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1602 if(i + 1 == n) /* remainder */
1603 tileresize(c, x, ty, (tx + tw) - x - 2 * c->border, th - 2 * c->border);
1604 else
1605 tileresize(c, x, ty, w - 2 * c->border, th - 2 * c->border);
1606 if(w != tw)
1607 x = c->x + c->w + 2 * c->border;
1608 }
1609 }
1610
1611 Client *
1612 tilemaster(unsigned int n) {
1613 Client *c = nexttiled(clients);
1614
1615 if(n == 1)
1616 tileresize(c, mox, moy, mow - 2 * c->border, moh - 2 * c->border);
1617 else
1618 tileresize(c, mx, my, mw - 2 * c->border, mh - 2 * c->border);
1619 return c;
1620 }
1621
1622 void
1623 tileresize(Client *c, int x, int y, int w, int h) {
1624 resize(c, x, y, w, h, RESIZEHINTS);
1625 if((RESIZEHINTS) && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
1626 /* client doesn't accept size constraints */
1627 resize(c, x, y, w, h, False);
1628 }
1629
1630 void
1631 tilev(void) {
1632 int y, h;
1633 unsigned int i, n = counttiled();
1634 Client *c;
1635
1636 if(n == 0)
1637 return;
1638 c = tilemaster(n);
1639 if(--n == 0)
1640 return;
1641
1642 y = ty;
1643 h = th / n;
1644 if(h < bh)
1645 h = th;
1646
1647 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1648 if(i + 1 == n) /* remainder */
1649 tileresize(c, tx, y, tw - 2 * c->border, (ty + th) - y - 2 * c->border);
1650 else
1651 tileresize(c, tx, y, tw - 2 * c->border, h - 2 * c->border);
1652 if(h != th)
1653 y = c->y + c->h + 2 * c->border;
1654 }
1655 }
1656
1657 void
1658 togglefloating(const char *arg) {
1659 if(!sel)
1660 return;
1661 sel->isfloating = !sel->isfloating;
1662 if(sel->isfloating)
1663 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1664 arrange();
1665 }
1666
1667 void
1668 toggletag(const char *arg) {
1669 unsigned int i, j;
1670
1671 if(!sel)
1672 return;
1673 i = idxoftag(arg);
1674 sel->tags[i] = !sel->tags[i];
1675 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1676 if(j == LENGTH(tags))
1677 sel->tags[i] = True; /* at least one tag must be enabled */
1678 arrange();
1679 }
1680
1681 void
1682 toggleview(const char *arg) {
1683 unsigned int i, j;
1684
1685 i = idxoftag(arg);
1686 seltags[i] = !seltags[i];
1687 for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1688 if(j == LENGTH(tags))
1689 seltags[i] = True; /* at least one tag must be viewed */
1690 arrange();
1691 }
1692
1693 void
1694 unban(Client *c) {
1695 if(!c->isbanned)
1696 return;
1697 XMoveWindow(dpy, c->win, c->x, c->y);
1698 c->isbanned = False;
1699 }
1700
1701 void
1702 unmanage(Client *c) {
1703 XWindowChanges wc;
1704
1705 wc.border_width = c->oldborder;
1706 /* The server grab construct avoids race conditions. */
1707 XGrabServer(dpy);
1708 XSetErrorHandler(xerrordummy);
1709 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1710 detach(c);
1711 detachstack(c);
1712 if(sel == c)
1713 focus(NULL);
1714 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1715 setclientstate(c, WithdrawnState);
1716 free(c->tags);
1717 free(c);
1718 XSync(dpy, False);
1719 XSetErrorHandler(xerror);
1720 XUngrabServer(dpy);
1721 arrange();
1722 }
1723
1724 void
1725 unmapnotify(XEvent *e) {
1726 Client *c;
1727 XUnmapEvent *ev = &e->xunmap;
1728
1729 if((c = getclient(ev->window)))
1730 unmanage(c);
1731 }
1732
1733 void
1734 updatebarpos(void) {
1735
1736 if(dc.drawable != 0)
1737 XFreePixmap(dpy, dc.drawable);
1738 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1739 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1740 }
1741
1742 void
1743 updatesizehints(Client *c) {
1744 long msize;
1745 XSizeHints size;
1746
1747 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1748 size.flags = PSize;
1749 c->flags = size.flags;
1750 if(c->flags & PBaseSize) {
1751 c->basew = size.base_width;
1752 c->baseh = size.base_height;
1753 }
1754 else if(c->flags & PMinSize) {
1755 c->basew = size.min_width;
1756 c->baseh = size.min_height;
1757 }
1758 else
1759 c->basew = c->baseh = 0;
1760 if(c->flags & PResizeInc) {
1761 c->incw = size.width_inc;
1762 c->inch = size.height_inc;
1763 }
1764 else
1765 c->incw = c->inch = 0;
1766 if(c->flags & PMaxSize) {
1767 c->maxw = size.max_width;
1768 c->maxh = size.max_height;
1769 }
1770 else
1771 c->maxw = c->maxh = 0;
1772 if(c->flags & PMinSize) {
1773 c->minw = size.min_width;
1774 c->minh = size.min_height;
1775 }
1776 else if(c->flags & PBaseSize) {
1777 c->minw = size.base_width;
1778 c->minh = size.base_height;
1779 }
1780 else
1781 c->minw = c->minh = 0;
1782 if(c->flags & PAspect) {
1783 c->minax = size.min_aspect.x;
1784 c->maxax = size.max_aspect.x;
1785 c->minay = size.min_aspect.y;
1786 c->maxay = size.max_aspect.y;
1787 }
1788 else
1789 c->minax = c->maxax = c->minay = c->maxay = 0;
1790 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1791 && c->maxw == c->minw && c->maxh == c->minh);
1792 }
1793
1794 void
1795 updatetitle(Client *c) {
1796 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1797 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1798 }
1799
1800 void
1801 updatewmhints(Client *c) {
1802 XWMHints *wmh;
1803
1804 if((wmh = XGetWMHints(dpy, c->win))) {
1805 if(c == sel)
1806 sel->isurgent = False;
1807 else
1808 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1809 XFree(wmh);
1810 }
1811 }
1812
1813
1814 void
1815 view(const char *arg) {
1816 unsigned int i;
1817
1818 for(i = 0; i < LENGTH(tags); i++)
1819 tmp[i] = (NULL == arg);
1820 tmp[idxoftag(arg)] = True;
1821
1822 if(memcmp(seltags, tmp, TAGSZ) != 0) {
1823 memcpy(prevtags, seltags, TAGSZ);
1824 memcpy(seltags, tmp, TAGSZ);
1825 arrange();
1826 }
1827 }
1828
1829 void
1830 viewprevtag(const char *arg) {
1831
1832 memcpy(tmp, seltags, TAGSZ);
1833 memcpy(seltags, prevtags, TAGSZ);
1834 memcpy(prevtags, tmp, TAGSZ);
1835 arrange();
1836 }
1837
1838 /* There's no way to check accesses to destroyed windows, thus those cases are
1839 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1840 * default error handler, which may call exit. */
1841 int
1842 xerror(Display *dpy, XErrorEvent *ee) {
1843 if(ee->error_code == BadWindow
1844 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1845 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1846 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1847 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1848 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1849 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1850 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1851 return 0;
1852 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1853 ee->request_code, ee->error_code);
1854 return xerrorxlib(dpy, ee); /* may call exit */
1855 }
1856
1857 int
1858 xerrordummy(Display *dpy, XErrorEvent *ee) {
1859 return 0;
1860 }
1861
1862 /* Startup Error handler to check if another window manager
1863 * is already running. */
1864 int
1865 xerrorstart(Display *dpy, XErrorEvent *ee) {
1866 otherwm = True;
1867 return -1;
1868 }
1869
1870 void
1871 zoom(const char *arg) {
1872 Client *c = sel;
1873
1874 if(!sel || lt->isfloating || sel->isfloating)
1875 return;
1876 if(c == nexttiled(clients))
1877 if(!(c = nexttiled(c->next)))
1878 return;
1879 detach(c);
1880 attach(c);
1881 focus(c);
1882 arrange();
1883 }
1884
1885 int
1886 main(int argc, char *argv[]) {
1887 if(argc == 2 && !strcmp("-v", argv[1]))
1888 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1889 else if(argc != 1)
1890 eprint("usage: dwm [-v]\n");
1891
1892 setlocale(LC_CTYPE, "");
1893 if(!(dpy = XOpenDisplay(0)))
1894 eprint("dwm: cannot open display\n");
1895
1896 checkotherwm();
1897 setup();
1898 scan();
1899 run();
1900 cleanup();
1901
1902 XCloseDisplay(dpy);
1903 return 0;
1904 }