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[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 MAX(a, b) ((a) > (b) ? (a) : (b))
45 #define MIN(a, b) ((a) < (b) ? (a) : (b))
46 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
47 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
48 #define LENGTH(x) (sizeof x / sizeof x[0])
49 #define MAXTAGLEN 16
50 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
51
52 /* enums */
53 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
54 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
55 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
56 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
57
58 /* typedefs */
59 typedef struct Client Client;
60 struct Client {
61 char name[256];
62 int x, y, w, h;
63 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
64 int minax, maxax, minay, maxay;
65 long flags;
66 unsigned int bw, oldbw;
67 Bool isbanned, isfixed, isfloating, isurgent;
68 Bool *tags;
69 Client *next;
70 Client *prev;
71 Client *snext;
72 Window win;
73 };
74
75 typedef struct {
76 int x, y, w, h;
77 unsigned long norm[ColLast];
78 unsigned long sel[ColLast];
79 Drawable drawable;
80 GC gc;
81 struct {
82 int ascent;
83 int descent;
84 int height;
85 XFontSet set;
86 XFontStruct *xfont;
87 } font;
88 } DC; /* draw context */
89
90 typedef struct {
91 unsigned long mod;
92 KeySym keysym;
93 void (*func)(const char *arg);
94 const char *arg;
95 } Key;
96
97 typedef struct {
98 const char *symbol;
99 void (*arrange)(void);
100 } Layout;
101
102 typedef struct {
103 const char *class;
104 const char *instance;
105 const char *title;
106 const char *tag;
107 Bool isfloating;
108 } Rule;
109
110 /* function declarations */
111 void applyrules(Client *c);
112 void arrange(void);
113 void attach(Client *c);
114 void attachstack(Client *c);
115 void ban(Client *c);
116 void buttonpress(XEvent *e);
117 void checkotherwm(void);
118 void cleanup(void);
119 void configure(Client *c);
120 void configurenotify(XEvent *e);
121 void configurerequest(XEvent *e);
122 unsigned int counttiled(void);
123 void destroynotify(XEvent *e);
124 void detach(Client *c);
125 void detachstack(Client *c);
126 void drawbar(void);
127 void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
128 void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
129 void *emallocz(unsigned int size);
130 void enternotify(XEvent *e);
131 void eprint(const char *errstr, ...);
132 void expose(XEvent *e);
133 void focus(Client *c);
134 void focusin(XEvent *e);
135 void focusnext(const char *arg);
136 void focusprev(const char *arg);
137 Client *getclient(Window w);
138 unsigned long getcolor(const char *colstr);
139 long getstate(Window w);
140 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
141 void grabbuttons(Client *c, Bool focused);
142 void grabkeys(void);
143 unsigned int idxoftag(const char *t);
144 void initfont(const char *fontstr);
145 Bool isoccupied(unsigned int t);
146 Bool isprotodel(Client *c);
147 Bool isurgent(unsigned int t);
148 Bool isvisible(Client *c, Bool *cmp);
149 void keypress(XEvent *e);
150 void killclient(const char *arg);
151 void manage(Window w, XWindowAttributes *wa);
152 void mappingnotify(XEvent *e);
153 void maprequest(XEvent *e);
154 void monocle(void);
155 void movemouse(Client *c);
156 Client *nexttiled(Client *c);
157 void propertynotify(XEvent *e);
158 void quit(const char *arg);
159 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
160 void resizemouse(Client *c);
161 void restack(void);
162 void run(void);
163 void scan(void);
164 void setclientstate(Client *c, long state);
165 void setmfact(const char *arg);
166 void setup(void);
167 void spawn(const char *arg);
168 void tag(const char *arg);
169 unsigned int textnw(const char *text, unsigned int len);
170 unsigned int textw(const char *text);
171 void tileh(void);
172 void tilehstack(unsigned int n);
173 Client *tilemaster(unsigned int n);
174 void tileresize(Client *c, int x, int y, int w, int h);
175 void tilev(void);
176 void tilevstack(unsigned int n);
177 void togglefloating(const char *arg);
178 void togglelayout(const char *arg);
179 void toggletag(const char *arg);
180 void toggleview(const char *arg);
181 void unban(Client *c);
182 void unmanage(Client *c);
183 void unmapnotify(XEvent *e);
184 void updatebar(void);
185 void updategeom(void);
186 void updatesizehints(Client *c);
187 void updatetitle(Client *c);
188 void updatewmhints(Client *c);
189 void view(const char *arg);
190 void viewprevtag(const char *arg); /* views previous selected tags */
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 char *arg);
195
196 /* variables */
197 char stext[256];
198 int screen, sx, sy, sw, sh;
199 int (*xerrorxlib)(Display *, XErrorEvent *);
200 int bx, by, bw, bh, blw, mx, my, mw, mh, tx, ty, tw, th, wx, wy, ww, wh;
201 int seltags = 0;
202 double mfact;
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 Bool *tagset[2];
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 #define TAGSZ (LENGTH(tags) * sizeof(Bool))
235
236 /* function implementations */
237
238 void
239 applyrules(Client *c) {
240 unsigned int i;
241 Bool matched = False;
242 Rule *r;
243 XClassHint ch = { 0 };
244
245 /* rule matching */
246 XGetClassHint(dpy, c->win, &ch);
247 for(i = 0; i < LENGTH(rules); i++) {
248 r = &rules[i];
249 if((!r->title || strstr(c->name, r->title))
250 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
251 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
252 c->isfloating = r->isfloating;
253 if(r->tag) {
254 c->tags[idxoftag(r->tag)] = True;
255 matched = True;
256 }
257 }
258 }
259 if(ch.res_class)
260 XFree(ch.res_class);
261 if(ch.res_name)
262 XFree(ch.res_name);
263 if(!matched)
264 memcpy(c->tags, tagset[seltags], TAGSZ);
265 }
266
267 void
268 arrange(void) {
269 Client *c;
270
271 for(c = clients; c; c = c->next)
272 if(isvisible(c, NULL)) {
273 unban(c);
274 if(!lt->arrange || c->isfloating)
275 resize(c, c->x, c->y, c->w, c->h, True);
276 }
277 else
278 ban(c);
279
280 focus(NULL);
281 if(lt->arrange)
282 lt->arrange();
283 restack();
284 }
285
286 void
287 attach(Client *c) {
288 if(clients)
289 clients->prev = c;
290 c->next = clients;
291 clients = c;
292 }
293
294 void
295 attachstack(Client *c) {
296 c->snext = stack;
297 stack = c;
298 }
299
300 void
301 ban(Client *c) {
302 if(c->isbanned)
303 return;
304 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
305 c->isbanned = True;
306 }
307
308 void
309 buttonpress(XEvent *e) {
310 unsigned int i, x;
311 Client *c;
312 XButtonPressedEvent *ev = &e->xbutton;
313
314 if(ev->window == barwin) {
315 x = 0;
316 for(i = 0; i < LENGTH(tags); i++) {
317 x += textw(tags[i]);
318 if(ev->x < x) {
319 if(ev->button == Button1) {
320 if(ev->state & MODKEY)
321 tag(tags[i]);
322 else
323 view(tags[i]);
324 }
325 else if(ev->button == Button3) {
326 if(ev->state & MODKEY)
327 toggletag(tags[i]);
328 else
329 toggleview(tags[i]);
330 }
331 return;
332 }
333 }
334 if((ev->x < x + blw) && ev->button == Button1)
335 togglelayout(NULL);
336 }
337 else if((c = getclient(ev->window))) {
338 focus(c);
339 if(CLEANMASK(ev->state) != MODKEY)
340 return;
341 if(ev->button == Button1) {
342 restack();
343 movemouse(c);
344 }
345 else if(ev->button == Button2) {
346 if(lt->arrange && c->isfloating)
347 togglefloating(NULL);
348 else
349 zoom(NULL);
350 }
351 else if(ev->button == Button3 && !c->isfixed) {
352 restack();
353 resizemouse(c);
354 }
355 }
356 }
357
358 void
359 checkotherwm(void) {
360 otherwm = False;
361 XSetErrorHandler(xerrorstart);
362
363 /* this causes an error if some other window manager is running */
364 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
365 XSync(dpy, False);
366 if(otherwm)
367 eprint("dwm: another window manager is already running\n");
368 XSync(dpy, False);
369 XSetErrorHandler(NULL);
370 xerrorxlib = XSetErrorHandler(xerror);
371 XSync(dpy, False);
372 }
373
374 void
375 cleanup(void) {
376 close(STDIN_FILENO);
377 while(stack) {
378 unban(stack);
379 unmanage(stack);
380 }
381 if(dc.font.set)
382 XFreeFontSet(dpy, dc.font.set);
383 else
384 XFreeFont(dpy, dc.font.xfont);
385 XUngrabKey(dpy, AnyKey, AnyModifier, root);
386 XFreePixmap(dpy, dc.drawable);
387 XFreeGC(dpy, dc.gc);
388 XFreeCursor(dpy, cursor[CurNormal]);
389 XFreeCursor(dpy, cursor[CurResize]);
390 XFreeCursor(dpy, cursor[CurMove]);
391 XDestroyWindow(dpy, barwin);
392 XSync(dpy, False);
393 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
394 }
395
396 void
397 configure(Client *c) {
398 XConfigureEvent ce;
399
400 ce.type = ConfigureNotify;
401 ce.display = dpy;
402 ce.event = c->win;
403 ce.window = c->win;
404 ce.x = c->x;
405 ce.y = c->y;
406 ce.width = c->w;
407 ce.height = c->h;
408 ce.border_width = c->bw;
409 ce.above = None;
410 ce.override_redirect = False;
411 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
412 }
413
414 void
415 configurenotify(XEvent *e) {
416 XConfigureEvent *ev = &e->xconfigure;
417
418 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
419 sw = ev->width;
420 sh = ev->height;
421 updategeom();
422 updatebar();
423 arrange();
424 }
425 }
426
427 void
428 configurerequest(XEvent *e) {
429 Client *c;
430 XConfigureRequestEvent *ev = &e->xconfigurerequest;
431 XWindowChanges wc;
432
433 if((c = getclient(ev->window))) {
434 if(ev->value_mask & CWBorderWidth)
435 c->bw = ev->border_width;
436 if(c->isfixed || c->isfloating || !lt->arrange) {
437 if(ev->value_mask & CWX)
438 c->x = sx + ev->x;
439 if(ev->value_mask & CWY)
440 c->y = sy + ev->y;
441 if(ev->value_mask & CWWidth)
442 c->w = ev->width;
443 if(ev->value_mask & CWHeight)
444 c->h = ev->height;
445 if((c->x - sx + c->w) > sw && c->isfloating)
446 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
447 if((c->y - sy + c->h) > sh && c->isfloating)
448 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
449 if((ev->value_mask & (CWX|CWY))
450 && !(ev->value_mask & (CWWidth|CWHeight)))
451 configure(c);
452 if(isvisible(c, NULL))
453 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
454 }
455 else
456 configure(c);
457 }
458 else {
459 wc.x = ev->x;
460 wc.y = ev->y;
461 wc.width = ev->width;
462 wc.height = ev->height;
463 wc.border_width = ev->border_width;
464 wc.sibling = ev->above;
465 wc.stack_mode = ev->detail;
466 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
467 }
468 XSync(dpy, False);
469 }
470
471 unsigned int
472 counttiled(void) {
473 unsigned int n;
474 Client *c;
475
476 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
477 return n;
478 }
479
480 void
481 destroynotify(XEvent *e) {
482 Client *c;
483 XDestroyWindowEvent *ev = &e->xdestroywindow;
484
485 if((c = getclient(ev->window)))
486 unmanage(c);
487 }
488
489 void
490 detach(Client *c) {
491 if(c->prev)
492 c->prev->next = c->next;
493 if(c->next)
494 c->next->prev = c->prev;
495 if(c == clients)
496 clients = c->next;
497 c->next = c->prev = NULL;
498 }
499
500 void
501 detachstack(Client *c) {
502 Client **tc;
503
504 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
505 *tc = c->snext;
506 }
507
508 void
509 drawbar(void) {
510 int i, x;
511 Client *c;
512
513 dc.x = 0;
514 for(c = stack; c && !isvisible(c, NULL); c = c->snext);
515 for(i = 0; i < LENGTH(tags); i++) {
516 dc.w = textw(tags[i]);
517 if(tagset[seltags][i]) {
518 drawtext(tags[i], dc.sel, isurgent(i));
519 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
520 }
521 else {
522 drawtext(tags[i], dc.norm, isurgent(i));
523 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
524 }
525 dc.x += dc.w;
526 }
527 if(blw > 0) {
528 dc.w = blw;
529 drawtext(lt->symbol, dc.norm, False);
530 x = dc.x + dc.w;
531 }
532 else
533 x = dc.x;
534 dc.w = textw(stext);
535 dc.x = bw - dc.w;
536 if(dc.x < x) {
537 dc.x = x;
538 dc.w = bw - x;
539 }
540 drawtext(stext, dc.norm, False);
541 if((dc.w = dc.x - x) > bh) {
542 dc.x = x;
543 if(c) {
544 drawtext(c->name, dc.sel, False);
545 drawsquare(False, c->isfloating, False, dc.sel);
546 }
547 else
548 drawtext(NULL, dc.norm, False);
549 }
550 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
551 XSync(dpy, False);
552 }
553
554 void
555 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
556 int x;
557 XGCValues gcv;
558 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
559
560 gcv.foreground = col[invert ? ColBG : ColFG];
561 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
562 x = (dc.font.ascent + dc.font.descent + 2) / 4;
563 r.x = dc.x + 1;
564 r.y = dc.y + 1;
565 if(filled) {
566 r.width = r.height = x + 1;
567 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
568 }
569 else if(empty) {
570 r.width = r.height = x;
571 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
572 }
573 }
574
575 void
576 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
577 int x, y, w, h;
578 unsigned int len, olen;
579 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
580 char buf[256];
581
582 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
583 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
584 if(!text)
585 return;
586 olen = strlen(text);
587 len = MIN(olen, sizeof buf);
588 memcpy(buf, text, len);
589 w = 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 for(; len && (w = textnw(buf, len)) > dc.w - h; len--);
595 if(!len)
596 return;
597 if(len < olen) {
598 if(len > 1)
599 buf[len - 1] = '.';
600 if(len > 2)
601 buf[len - 2] = '.';
602 if(len > 3)
603 buf[len - 3] = '.';
604 }
605 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
606 if(dc.font.set)
607 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
608 else
609 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
610 }
611
612 void *
613 emallocz(unsigned int size) {
614 void *res = calloc(1, size);
615
616 if(!res)
617 eprint("fatal: could not malloc() %u bytes\n", size);
618 return res;
619 }
620
621 void
622 enternotify(XEvent *e) {
623 Client *c;
624 XCrossingEvent *ev = &e->xcrossing;
625
626 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
627 return;
628 if((c = getclient(ev->window)))
629 focus(c);
630 else
631 focus(NULL);
632 }
633
634 void
635 eprint(const char *errstr, ...) {
636 va_list ap;
637
638 va_start(ap, errstr);
639 vfprintf(stderr, errstr, ap);
640 va_end(ap);
641 exit(EXIT_FAILURE);
642 }
643
644 void
645 expose(XEvent *e) {
646 XExposeEvent *ev = &e->xexpose;
647
648 if(ev->count == 0 && (ev->window == barwin))
649 drawbar();
650 }
651
652 void
653 focus(Client *c) {
654 if(!c || (c && !isvisible(c, NULL)))
655 for(c = stack; c && !isvisible(c, NULL); c = c->snext);
656 if(sel && sel != c) {
657 grabbuttons(sel, False);
658 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
659 }
660 if(c) {
661 detachstack(c);
662 attachstack(c);
663 grabbuttons(c, True);
664 }
665 sel = c;
666 if(c) {
667 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
668 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
669 }
670 else
671 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
672 drawbar();
673 }
674
675 void
676 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
677 XFocusChangeEvent *ev = &e->xfocus;
678
679 if(sel && ev->window != sel->win)
680 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
681 }
682
683 void
684 focusnext(const char *arg) {
685 Client *c;
686
687 if(!sel)
688 return;
689 for(c = sel->next; c && !isvisible(c, arg ? sel->tags : NULL); c = c->next);
690 if(!c)
691 for(c = clients; c && !isvisible(c, arg ? sel->tags : NULL); c = c->next);
692 if(c) {
693 focus(c);
694 restack();
695 }
696 }
697
698 void
699 focusprev(const char *arg) {
700 Client *c;
701
702 if(!sel)
703 return;
704 for(c = sel->prev; c && !isvisible(c, arg ? sel->tags : NULL); c = c->prev);
705 if(!c) {
706 for(c = clients; c && c->next; c = c->next);
707 for(; c && !isvisible(c, arg ? sel->tags : NULL); c = c->prev);
708 }
709 if(c) {
710 focus(c);
711 restack();
712 }
713 }
714
715 Client *
716 getclient(Window w) {
717 Client *c;
718
719 for(c = clients; c && c->win != w; c = c->next);
720 return c;
721 }
722
723 unsigned long
724 getcolor(const char *colstr) {
725 Colormap cmap = DefaultColormap(dpy, screen);
726 XColor color;
727
728 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
729 eprint("error, cannot allocate color '%s'\n", colstr);
730 return color.pixel;
731 }
732
733 long
734 getstate(Window w) {
735 int format, status;
736 long result = -1;
737 unsigned char *p = NULL;
738 unsigned long n, extra;
739 Atom real;
740
741 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
742 &real, &format, &n, &extra, (unsigned char **)&p);
743 if(status != Success)
744 return -1;
745 if(n != 0)
746 result = *p;
747 XFree(p);
748 return result;
749 }
750
751 Bool
752 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
753 char **list = NULL;
754 int n;
755 XTextProperty name;
756
757 if(!text || size == 0)
758 return False;
759 text[0] = '\0';
760 XGetTextProperty(dpy, w, &name, atom);
761 if(!name.nitems)
762 return False;
763 if(name.encoding == XA_STRING)
764 strncpy(text, (char *)name.value, size - 1);
765 else {
766 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
767 && n > 0 && *list) {
768 strncpy(text, *list, size - 1);
769 XFreeStringList(list);
770 }
771 }
772 text[size - 1] = '\0';
773 XFree(name.value);
774 return True;
775 }
776
777 void
778 grabbuttons(Client *c, Bool focused) {
779 int i, j;
780 unsigned int buttons[] = { Button1, Button2, Button3 };
781 unsigned int modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask,
782 MODKEY|numlockmask|LockMask} ;
783
784 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
785 if(focused)
786 for(i = 0; i < LENGTH(buttons); i++)
787 for(j = 0; j < LENGTH(modifiers); j++)
788 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
789 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
790 else
791 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
792 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
793 }
794
795 void
796 grabkeys(void) {
797 unsigned int i, j;
798 KeyCode code;
799 XModifierKeymap *modmap;
800
801 /* init modifier map */
802 modmap = XGetModifierMapping(dpy);
803 for(i = 0; i < 8; i++)
804 for(j = 0; j < modmap->max_keypermod; j++) {
805 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
806 numlockmask = (1 << i);
807 }
808 XFreeModifiermap(modmap);
809
810 XUngrabKey(dpy, AnyKey, AnyModifier, root);
811 for(i = 0; i < LENGTH(keys); i++) {
812 code = XKeysymToKeycode(dpy, keys[i].keysym);
813 XGrabKey(dpy, code, keys[i].mod, root, True,
814 GrabModeAsync, GrabModeAsync);
815 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
816 GrabModeAsync, GrabModeAsync);
817 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
818 GrabModeAsync, GrabModeAsync);
819 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
820 GrabModeAsync, GrabModeAsync);
821 }
822 }
823
824 unsigned int
825 idxoftag(const char *t) {
826 unsigned int i;
827
828 for(i = 0; (i < LENGTH(tags)) && t && strcmp(tags[i], t); i++);
829 return (i < LENGTH(tags)) ? i : 0;
830 }
831
832 void
833 initfont(const char *fontstr) {
834 char *def, **missing;
835 int i, n;
836
837 missing = NULL;
838 if(dc.font.set)
839 XFreeFontSet(dpy, dc.font.set);
840 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
841 if(missing) {
842 while(n--)
843 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
844 XFreeStringList(missing);
845 }
846 if(dc.font.set) {
847 XFontSetExtents *font_extents;
848 XFontStruct **xfonts;
849 char **font_names;
850 dc.font.ascent = dc.font.descent = 0;
851 font_extents = XExtentsOfFontSet(dc.font.set);
852 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
853 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
854 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
855 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
856 xfonts++;
857 }
858 }
859 else {
860 if(dc.font.xfont)
861 XFreeFont(dpy, dc.font.xfont);
862 dc.font.xfont = NULL;
863 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
864 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
865 eprint("error, cannot load font: '%s'\n", fontstr);
866 dc.font.ascent = dc.font.xfont->ascent;
867 dc.font.descent = dc.font.xfont->descent;
868 }
869 dc.font.height = dc.font.ascent + dc.font.descent;
870 }
871
872 Bool
873 isoccupied(unsigned int t) {
874 Client *c;
875
876 for(c = clients; c; c = c->next)
877 if(c->tags[t])
878 return True;
879 return False;
880 }
881
882 Bool
883 isprotodel(Client *c) {
884 int i, n;
885 Atom *protocols;
886 Bool ret = False;
887
888 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
889 for(i = 0; !ret && i < n; i++)
890 if(protocols[i] == wmatom[WMDelete])
891 ret = True;
892 XFree(protocols);
893 }
894 return ret;
895 }
896
897 Bool
898 isurgent(unsigned int t) {
899 Client *c;
900
901 for(c = clients; c; c = c->next)
902 if(c->isurgent && c->tags[t])
903 return True;
904 return False;
905 }
906
907 Bool
908 isvisible(Client *c, Bool *cmp) {
909 unsigned int i;
910
911 if(!cmp)
912 cmp = tagset[seltags];
913 for(i = 0; i < LENGTH(tags); i++)
914 if(c->tags[i] && cmp[i])
915 return True;
916 return False;
917 }
918
919 void
920 keypress(XEvent *e) {
921 unsigned int i;
922 KeySym keysym;
923 XKeyEvent *ev;
924
925 ev = &e->xkey;
926 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
927 for(i = 0; i < LENGTH(keys); i++)
928 if(keysym == keys[i].keysym
929 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
930 {
931 if(keys[i].func)
932 keys[i].func(keys[i].arg);
933 }
934 }
935
936 void
937 killclient(const char *arg) {
938 XEvent ev;
939
940 if(!sel)
941 return;
942 if(isprotodel(sel)) {
943 ev.type = ClientMessage;
944 ev.xclient.window = sel->win;
945 ev.xclient.message_type = wmatom[WMProtocols];
946 ev.xclient.format = 32;
947 ev.xclient.data.l[0] = wmatom[WMDelete];
948 ev.xclient.data.l[1] = CurrentTime;
949 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
950 }
951 else
952 XKillClient(dpy, sel->win);
953 }
954
955 void
956 manage(Window w, XWindowAttributes *wa) {
957 Client *c, *t = NULL;
958 Status rettrans;
959 Window trans;
960 XWindowChanges wc;
961
962 c = emallocz(sizeof(Client));
963 c->tags = emallocz(TAGSZ);
964 c->win = w;
965
966 /* geometry */
967 c->x = wa->x;
968 c->y = wa->y;
969 c->w = wa->width;
970 c->h = wa->height;
971 c->oldbw = wa->border_width;
972 if(c->w == sw && c->h == sh) {
973 c->x = sx;
974 c->y = sy;
975 c->bw = wa->border_width;
976 }
977 else {
978 if(c->x + c->w + 2 * c->bw > wx + ww)
979 c->x = wx + ww - c->w - 2 * c->bw;
980 if(c->y + c->h + 2 * c->bw > wy + wh)
981 c->y = wy + wh - c->h - 2 * c->bw;
982 c->x = MAX(c->x, wx);
983 c->y = MAX(c->y, wy);
984 c->bw = BORDERPX;
985 }
986
987 wc.border_width = c->bw;
988 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
989 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
990 configure(c); /* propagates border_width, if size doesn't change */
991 updatesizehints(c);
992 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
993 grabbuttons(c, False);
994 updatetitle(c);
995 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
996 for(t = clients; t && t->win != trans; t = t->next);
997 if(t)
998 memcpy(c->tags, t->tags, TAGSZ);
999 else
1000 applyrules(c);
1001 if(!c->isfloating)
1002 c->isfloating = (rettrans == Success) || c->isfixed;
1003 attach(c);
1004 attachstack(c);
1005 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1006 ban(c);
1007 XMapWindow(dpy, c->win);
1008 setclientstate(c, NormalState);
1009 arrange();
1010 }
1011
1012 void
1013 mappingnotify(XEvent *e) {
1014 XMappingEvent *ev = &e->xmapping;
1015
1016 XRefreshKeyboardMapping(ev);
1017 if(ev->request == MappingKeyboard)
1018 grabkeys();
1019 }
1020
1021 void
1022 maprequest(XEvent *e) {
1023 static XWindowAttributes wa;
1024 XMapRequestEvent *ev = &e->xmaprequest;
1025
1026 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1027 return;
1028 if(wa.override_redirect)
1029 return;
1030 if(!getclient(ev->window))
1031 manage(ev->window, &wa);
1032 }
1033
1034 void
1035 monocle(void) {
1036 Client *c;
1037
1038 for(c = clients; c; c = c->next)
1039 if(!c->isfloating && isvisible(c, NULL))
1040 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, RESIZEHINTS);
1041 }
1042
1043 void
1044 movemouse(Client *c) {
1045 int x1, y1, ocx, ocy, di, nx, ny;
1046 unsigned int dui;
1047 Window dummy;
1048 XEvent ev;
1049
1050 ocx = nx = c->x;
1051 ocy = ny = c->y;
1052 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1053 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1054 return;
1055 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1056 for(;;) {
1057 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1058 switch (ev.type) {
1059 case ButtonRelease:
1060 XUngrabPointer(dpy, CurrentTime);
1061 return;
1062 case ConfigureRequest:
1063 case Expose:
1064 case MapRequest:
1065 handler[ev.type](&ev);
1066 break;
1067 case MotionNotify:
1068 XSync(dpy, False);
1069 nx = ocx + (ev.xmotion.x - x1);
1070 ny = ocy + (ev.xmotion.y - y1);
1071 if(abs(wx - nx) < SNAP)
1072 nx = wx;
1073 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < SNAP)
1074 nx = wx + ww - c->w - 2 * c->bw;
1075 if(abs(wy - ny) < SNAP)
1076 ny = wy;
1077 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < SNAP)
1078 ny = wy + wh - c->h - 2 * c->bw;
1079 if(!c->isfloating && lt->arrange && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1080 togglefloating(NULL);
1081 if(!lt->arrange || c->isfloating)
1082 resize(c, nx, ny, c->w, c->h, False);
1083 break;
1084 }
1085 }
1086 }
1087
1088 Client *
1089 nexttiled(Client *c) {
1090 for(; c && (c->isfloating || !isvisible(c, NULL)); c = c->next);
1091 return c;
1092 }
1093
1094 void
1095 propertynotify(XEvent *e) {
1096 Client *c;
1097 Window trans;
1098 XPropertyEvent *ev = &e->xproperty;
1099
1100 if(ev->state == PropertyDelete)
1101 return; /* ignore */
1102 if((c = getclient(ev->window))) {
1103 switch (ev->atom) {
1104 default: break;
1105 case XA_WM_TRANSIENT_FOR:
1106 XGetTransientForHint(dpy, c->win, &trans);
1107 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1108 arrange();
1109 break;
1110 case XA_WM_NORMAL_HINTS:
1111 updatesizehints(c);
1112 break;
1113 case XA_WM_HINTS:
1114 updatewmhints(c);
1115 drawbar();
1116 break;
1117 }
1118 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1119 updatetitle(c);
1120 if(c == sel)
1121 drawbar();
1122 }
1123 }
1124 }
1125
1126 void
1127 quit(const char *arg) {
1128 readin = running = False;
1129 }
1130
1131 void
1132 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1133 XWindowChanges wc;
1134
1135 if(sizehints) {
1136 /* set minimum possible */
1137 w = MAX(1, w);
1138 h = MAX(1, h);
1139
1140 /* temporarily remove base dimensions */
1141 w -= c->basew;
1142 h -= c->baseh;
1143
1144 /* adjust for aspect limits */
1145 if(c->minax != c->maxax && c->minay != c->maxay
1146 && c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0) {
1147 if(w * c->maxay > h * c->maxax)
1148 w = h * c->maxax / c->maxay;
1149 else if(w * c->minay < h * c->minax)
1150 h = w * c->minay / c->minax;
1151 }
1152
1153 /* adjust for increment value */
1154 if(c->incw)
1155 w -= w % c->incw;
1156 if(c->inch)
1157 h -= h % c->inch;
1158
1159 /* restore base dimensions */
1160 w += c->basew;
1161 h += c->baseh;
1162
1163 w = MAX(w, c->minw);
1164 h = MAX(h, c->minh);
1165
1166 if (c->maxw)
1167 w = MIN(w, c->maxw);
1168
1169 if (c->maxh)
1170 h = MIN(h, c->maxh);
1171 }
1172 if(w <= 0 || h <= 0)
1173 return;
1174 if(x > sx + sw)
1175 x = sw - w - 2 * c->bw;
1176 if(y > sy + sh)
1177 y = sh - h - 2 * c->bw;
1178 if(x + w + 2 * c->bw < sx)
1179 x = sx;
1180 if(y + h + 2 * c->bw < sy)
1181 y = sy;
1182 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1183 c->x = wc.x = x;
1184 c->y = wc.y = y;
1185 c->w = wc.width = w;
1186 c->h = wc.height = h;
1187 wc.border_width = c->bw;
1188 XConfigureWindow(dpy, c->win,
1189 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1190 configure(c);
1191 XSync(dpy, False);
1192 }
1193 }
1194
1195 void
1196 resizemouse(Client *c) {
1197 int ocx, ocy;
1198 int nw, nh;
1199 XEvent ev;
1200
1201 ocx = c->x;
1202 ocy = c->y;
1203 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1204 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1205 return;
1206 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1207 for(;;) {
1208 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1209 switch(ev.type) {
1210 case ButtonRelease:
1211 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1212 c->w + c->bw - 1, c->h + c->bw - 1);
1213 XUngrabPointer(dpy, CurrentTime);
1214 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1215 return;
1216 case ConfigureRequest:
1217 case Expose:
1218 case MapRequest:
1219 handler[ev.type](&ev);
1220 break;
1221 case MotionNotify:
1222 XSync(dpy, False);
1223 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1224 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1225 if(!c->isfloating && lt->arrange && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP)) {
1226 togglefloating(NULL);
1227 }
1228 if(!lt->arrange || c->isfloating)
1229 resize(c, c->x, c->y, nw, nh, True);
1230 break;
1231 }
1232 }
1233 }
1234
1235 void
1236 restack(void) {
1237 Client *c;
1238 XEvent ev;
1239 XWindowChanges wc;
1240
1241 drawbar();
1242 if(!sel)
1243 return;
1244 if(sel->isfloating || !lt->arrange)
1245 XRaiseWindow(dpy, sel->win);
1246 if(lt->arrange) {
1247 wc.stack_mode = Below;
1248 wc.sibling = barwin;
1249 for(c = stack; c; c = c->snext)
1250 if(!c->isfloating && isvisible(c, NULL)) {
1251 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1252 wc.sibling = c->win;
1253 }
1254 }
1255 XSync(dpy, False);
1256 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1257 }
1258
1259 void
1260 run(void) {
1261 char *p;
1262 char sbuf[sizeof stext];
1263 fd_set rd;
1264 int r, xfd;
1265 unsigned int len, offset;
1266 XEvent ev;
1267
1268 /* main event loop, also reads status text from stdin */
1269 XSync(dpy, False);
1270 xfd = ConnectionNumber(dpy);
1271 readin = True;
1272 offset = 0;
1273 len = sizeof stext - 1;
1274 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1275 while(running) {
1276 FD_ZERO(&rd);
1277 if(readin)
1278 FD_SET(STDIN_FILENO, &rd);
1279 FD_SET(xfd, &rd);
1280 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1281 if(errno == EINTR)
1282 continue;
1283 eprint("select failed\n");
1284 }
1285 if(FD_ISSET(STDIN_FILENO, &rd)) {
1286 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1287 case -1:
1288 strncpy(stext, strerror(errno), len);
1289 readin = False;
1290 break;
1291 case 0:
1292 strncpy(stext, "EOF", 4);
1293 readin = False;
1294 break;
1295 default:
1296 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1297 if(*p == '\n' || *p == '\0') {
1298 *p = '\0';
1299 strncpy(stext, sbuf, len);
1300 p += r - 1; /* p is sbuf + offset + r - 1 */
1301 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1302 offset = r;
1303 if(r)
1304 memmove(sbuf, p - r + 1, r);
1305 break;
1306 }
1307 break;
1308 }
1309 drawbar();
1310 }
1311 while(XPending(dpy)) {
1312 XNextEvent(dpy, &ev);
1313 if(handler[ev.type])
1314 (handler[ev.type])(&ev); /* call handler */
1315 }
1316 }
1317 }
1318
1319 void
1320 scan(void) {
1321 unsigned int i, num;
1322 Window *wins, d1, d2;
1323 XWindowAttributes wa;
1324
1325 wins = NULL;
1326 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1327 for(i = 0; i < num; i++) {
1328 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1329 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1330 continue;
1331 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1332 manage(wins[i], &wa);
1333 }
1334 for(i = 0; i < num; i++) { /* now the transients */
1335 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1336 continue;
1337 if(XGetTransientForHint(dpy, wins[i], &d1)
1338 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1339 manage(wins[i], &wa);
1340 }
1341 }
1342 if(wins)
1343 XFree(wins);
1344 }
1345
1346 void
1347 setclientstate(Client *c, long state) {
1348 long data[] = {state, None};
1349
1350 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1351 PropModeReplace, (unsigned char *)data, 2);
1352 }
1353
1354 /* TODO: move this into tile.c */
1355 void
1356 setmfact(const char *arg) {
1357 double d;
1358
1359 if(!lt->arrange) /* TODO: check this against the actual tile() function */
1360 return;
1361 if(!arg)
1362 mfact = MFACT;
1363 else {
1364 d = strtod(arg, NULL);
1365 if(arg[0] == '-' || arg[0] == '+')
1366 d += mfact;
1367 if(d < 0.1 || d > 0.9)
1368 return;
1369 mfact = d;
1370 }
1371 updategeom();
1372 arrange();
1373 }
1374
1375 void
1376 setup(void) {
1377 unsigned int i, w;
1378 XSetWindowAttributes wa;
1379
1380 /* init screen */
1381 screen = DefaultScreen(dpy);
1382 root = RootWindow(dpy, screen);
1383 initfont(FONT);
1384 sx = 0;
1385 sy = 0;
1386 sw = DisplayWidth(dpy, screen);
1387 sh = DisplayHeight(dpy, screen);
1388 bh = dc.font.height + 2;
1389 mfact = MFACT;
1390 updategeom();
1391
1392 /* init atoms */
1393 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1394 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1395 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1396 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1397 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1398 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1399
1400 /* init cursors */
1401 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1402 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1403 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1404
1405 /* init appearance */
1406 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1407 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1408 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1409 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1410 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1411 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1412 initfont(FONT);
1413 dc.h = bh;
1414 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1415 dc.gc = XCreateGC(dpy, root, 0, 0);
1416 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1417 if(!dc.font.set)
1418 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1419
1420 /* init tags */
1421 tagset[0] = emallocz(TAGSZ);
1422 tagset[1] = emallocz(TAGSZ);
1423 tagset[0][0] = tagset[1][0] = True;
1424
1425 /* init bar */
1426 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1427 w = textw(layouts[i].symbol);
1428 blw = MAX(blw, w);
1429 }
1430
1431 wa.override_redirect = 1;
1432 wa.background_pixmap = ParentRelative;
1433 wa.event_mask = ButtonPressMask|ExposureMask;
1434
1435 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1436 CopyFromParent, DefaultVisual(dpy, screen),
1437 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1438 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1439 XMapRaised(dpy, barwin);
1440 strcpy(stext, "dwm-"VERSION);
1441 drawbar();
1442
1443 /* EWMH support per view */
1444 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1445 PropModeReplace, (unsigned char *) netatom, NetLast);
1446
1447 /* select for events */
1448 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1449 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1450 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1451 XSelectInput(dpy, root, wa.event_mask);
1452
1453
1454 /* grab keys */
1455 grabkeys();
1456 }
1457
1458 void
1459 spawn(const char *arg) {
1460 static char *shell = NULL;
1461
1462 if(!shell && !(shell = getenv("SHELL")))
1463 shell = "/bin/sh";
1464 if(!arg)
1465 return;
1466 /* The double-fork construct avoids zombie processes and keeps the code
1467 * clean from stupid signal handlers. */
1468 if(fork() == 0) {
1469 if(fork() == 0) {
1470 if(dpy)
1471 close(ConnectionNumber(dpy));
1472 setsid();
1473 execl(shell, shell, "-c", arg, (char *)NULL);
1474 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1475 perror(" failed");
1476 }
1477 exit(0);
1478 }
1479 wait(0);
1480 }
1481
1482 void
1483 tag(const char *arg) {
1484 unsigned int i;
1485
1486 if(!sel)
1487 return;
1488 for(i = 0; i < LENGTH(tags); i++)
1489 sel->tags[i] = (arg == NULL);
1490 sel->tags[idxoftag(arg)] = True;
1491 arrange();
1492 }
1493
1494 unsigned int
1495 textnw(const char *text, unsigned int len) {
1496 XRectangle r;
1497
1498 if(dc.font.set) {
1499 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1500 return r.width;
1501 }
1502 return XTextWidth(dc.font.xfont, text, len);
1503 }
1504
1505 unsigned int
1506 textw(const char *text) {
1507 return textnw(text, strlen(text)) + dc.font.height;
1508 }
1509
1510 void
1511 tileh(void) {
1512 int x, w;
1513 unsigned int i, n = counttiled();
1514 Client *c;
1515
1516 if(n == 0)
1517 return;
1518 c = tilemaster(n);
1519 if(--n == 0)
1520 return;
1521
1522 x = tx;
1523 w = tw / n;
1524 if(w < bh)
1525 w = tw;
1526
1527 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1528 if(i + 1 == n) /* remainder */
1529 tileresize(c, x, ty, (tx + tw) - x - 2 * c->bw, th - 2 * c->bw);
1530 else
1531 tileresize(c, x, ty, w - 2 * c->bw, th - 2 * c->bw);
1532 if(w != tw)
1533 x = c->x + c->w + 2 * c->bw;
1534 }
1535 }
1536
1537 Client *
1538 tilemaster(unsigned int n) {
1539 Client *c = nexttiled(clients);
1540
1541 if(n == 1)
1542 tileresize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
1543 else
1544 tileresize(c, mx, my, mw - 2 * c->bw, mh - 2 * c->bw);
1545 return c;
1546 }
1547
1548 void
1549 tileresize(Client *c, int x, int y, int w, int h) {
1550 resize(c, x, y, w, h, RESIZEHINTS);
1551 if((RESIZEHINTS) && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
1552 /* client doesn't accept size constraints */
1553 resize(c, x, y, w, h, False);
1554 }
1555
1556 void
1557 tilev(void) {
1558 int y, h;
1559 unsigned int i, n = counttiled();
1560 Client *c;
1561
1562 if(n == 0)
1563 return;
1564 c = tilemaster(n);
1565 if(--n == 0)
1566 return;
1567
1568 y = ty;
1569 h = th / n;
1570 if(h < bh)
1571 h = th;
1572
1573 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1574 if(i + 1 == n) /* remainder */
1575 tileresize(c, tx, y, tw - 2 * c->bw, (ty + th) - y - 2 * c->bw);
1576 else
1577 tileresize(c, tx, y, tw - 2 * c->bw, h - 2 * c->bw);
1578 if(h != th)
1579 y = c->y + c->h + 2 * c->bw;
1580 }
1581 }
1582
1583 void
1584 togglefloating(const char *arg) {
1585 if(!sel)
1586 return;
1587 sel->isfloating = !sel->isfloating;
1588 if(sel->isfloating)
1589 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1590 arrange();
1591 }
1592
1593 void
1594 togglelayout(const char *arg) {
1595 unsigned int i;
1596
1597 if(!arg) {
1598 if(++lt == &layouts[LENGTH(layouts)])
1599 lt = &layouts[0];
1600 }
1601 else {
1602 for(i = 0; i < LENGTH(layouts); i++)
1603 if(!strcmp(arg, layouts[i].symbol))
1604 break;
1605 if(i == LENGTH(layouts))
1606 return;
1607 lt = &layouts[i];
1608 }
1609 if(sel)
1610 arrange();
1611 else
1612 drawbar();
1613 }
1614
1615 void
1616 toggletag(const char *arg) {
1617 unsigned int i, j;
1618
1619 if(!sel)
1620 return;
1621 i = idxoftag(arg);
1622 sel->tags[i] = !sel->tags[i];
1623 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1624 if(j == LENGTH(tags))
1625 sel->tags[i] = True; /* at least one tag must be enabled */
1626 arrange();
1627 }
1628
1629 void
1630 toggleview(const char *arg) {
1631 unsigned int i, j;
1632
1633 i = idxoftag(arg);
1634 tagset[seltags][i] = !tagset[seltags][i];
1635 for(j = 0; j < LENGTH(tags) && !tagset[seltags][j]; j++);
1636 if(j == LENGTH(tags))
1637 tagset[seltags][i] = True; /* at least one tag must be viewed */
1638 arrange();
1639 }
1640
1641 void
1642 unban(Client *c) {
1643 if(!c->isbanned)
1644 return;
1645 XMoveWindow(dpy, c->win, c->x, c->y);
1646 c->isbanned = False;
1647 }
1648
1649 void
1650 unmanage(Client *c) {
1651 XWindowChanges wc;
1652
1653 wc.border_width = c->oldbw;
1654 /* The server grab construct avoids race conditions. */
1655 XGrabServer(dpy);
1656 XSetErrorHandler(xerrordummy);
1657 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1658 detach(c);
1659 detachstack(c);
1660 if(sel == c)
1661 focus(NULL);
1662 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1663 setclientstate(c, WithdrawnState);
1664 free(c->tags);
1665 free(c);
1666 XSync(dpy, False);
1667 XSetErrorHandler(xerror);
1668 XUngrabServer(dpy);
1669 arrange();
1670 }
1671
1672 void
1673 unmapnotify(XEvent *e) {
1674 Client *c;
1675 XUnmapEvent *ev = &e->xunmap;
1676
1677 if((c = getclient(ev->window)))
1678 unmanage(c);
1679 }
1680
1681 void
1682 updatebar(void) {
1683 if(dc.drawable != 0)
1684 XFreePixmap(dpy, dc.drawable);
1685 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1686 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1687 }
1688
1689 void
1690 updategeom(void) {
1691
1692 /* bar geometry */
1693 bx = 0;
1694 by = 0;
1695 bw = sw;
1696
1697 /* window area geometry */
1698 wx = sx;
1699 wy = sy + bh;
1700 ww = sw;
1701 wh = sh - bh;
1702
1703 /* master area geometry */
1704 mx = wx;
1705 my = wy;
1706 mw = mfact * ww;
1707 mh = wh;
1708
1709 /* tile area geometry */
1710 tx = mx + mw;
1711 ty = wy;
1712 tw = ww - mw;
1713 th = wh;
1714 }
1715
1716 void
1717 updatesizehints(Client *c) {
1718 long msize;
1719 XSizeHints size;
1720
1721 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1722 size.flags = PSize;
1723 c->flags = size.flags;
1724 if(c->flags & PBaseSize) {
1725 c->basew = size.base_width;
1726 c->baseh = size.base_height;
1727 }
1728 else if(c->flags & PMinSize) {
1729 c->basew = size.min_width;
1730 c->baseh = size.min_height;
1731 }
1732 else
1733 c->basew = c->baseh = 0;
1734 if(c->flags & PResizeInc) {
1735 c->incw = size.width_inc;
1736 c->inch = size.height_inc;
1737 }
1738 else
1739 c->incw = c->inch = 0;
1740 if(c->flags & PMaxSize) {
1741 c->maxw = size.max_width;
1742 c->maxh = size.max_height;
1743 }
1744 else
1745 c->maxw = c->maxh = 0;
1746 if(c->flags & PMinSize) {
1747 c->minw = size.min_width;
1748 c->minh = size.min_height;
1749 }
1750 else if(c->flags & PBaseSize) {
1751 c->minw = size.base_width;
1752 c->minh = size.base_height;
1753 }
1754 else
1755 c->minw = c->minh = 0;
1756 if(c->flags & PAspect) {
1757 c->minax = size.min_aspect.x;
1758 c->maxax = size.max_aspect.x;
1759 c->minay = size.min_aspect.y;
1760 c->maxay = size.max_aspect.y;
1761 }
1762 else
1763 c->minax = c->maxax = c->minay = c->maxay = 0;
1764 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1765 && c->maxw == c->minw && c->maxh == c->minh);
1766 }
1767
1768 void
1769 updatetitle(Client *c) {
1770 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1771 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1772 }
1773
1774 void
1775 updatewmhints(Client *c) {
1776 XWMHints *wmh;
1777
1778 if((wmh = XGetWMHints(dpy, c->win))) {
1779 if(c == sel)
1780 sel->isurgent = False;
1781 else
1782 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1783 XFree(wmh);
1784 }
1785 }
1786
1787 void
1788 view(const char *arg) {
1789 seltags ^= 1; /* toggle sel tagset */
1790 memset(tagset[seltags], (NULL == arg), TAGSZ);
1791 tagset[seltags][idxoftag(arg)] = True;
1792 arrange();
1793 }
1794
1795 void
1796 viewprevtag(const char *arg) {
1797 seltags ^= 1; /* toggle sel tagset */
1798 arrange();
1799 }
1800
1801 /* There's no way to check accesses to destroyed windows, thus those cases are
1802 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1803 * default error handler, which may call exit. */
1804 int
1805 xerror(Display *dpy, XErrorEvent *ee) {
1806 if(ee->error_code == BadWindow
1807 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1808 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1809 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1810 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1811 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1812 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1813 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1814 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1815 return 0;
1816 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1817 ee->request_code, ee->error_code);
1818 return xerrorxlib(dpy, ee); /* may call exit */
1819 }
1820
1821 int
1822 xerrordummy(Display *dpy, XErrorEvent *ee) {
1823 return 0;
1824 }
1825
1826 /* Startup Error handler to check if another window manager
1827 * is already running. */
1828 int
1829 xerrorstart(Display *dpy, XErrorEvent *ee) {
1830 otherwm = True;
1831 return -1;
1832 }
1833
1834 /* TODO: move this into tile.c */
1835 void
1836 zoom(const char *arg) {
1837 Client *c = sel;
1838
1839 if(c == nexttiled(clients))
1840 if(!c || !(c = nexttiled(c->next)))
1841 return;
1842 if(lt->arrange && !sel->isfloating) { /* TODO: check this against tile() */
1843 detach(c);
1844 attach(c);
1845 focus(c);
1846 }
1847 arrange();
1848 }
1849
1850 int
1851 main(int argc, char *argv[]) {
1852 if(argc == 2 && !strcmp("-v", argv[1]))
1853 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1854 else if(argc != 1)
1855 eprint("usage: dwm [-v]\n");
1856
1857 setlocale(LC_CTYPE, "");
1858 if(!(dpy = XOpenDisplay(0)))
1859 eprint("dwm: cannot open display\n");
1860
1861 checkotherwm();
1862 setup();
1863 scan();
1864 run();
1865 cleanup();
1866
1867 XCloseDisplay(dpy);
1868 return 0;
1869 }