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recreated dwm.h
[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. For each client dwm
21 * creates a small title window, which is resized whenever the (_NET_)WM_NAME
22 * properties are updated or the client is moved/resized.
23 *
24 * Keys and tagging rules are organized as arrays and defined in config.h.
25 *
26 * To understand everything else, start reading main().
27 */
28 #include "dwm.h"
29
30 #include <errno.h>
31 #include <locale.h>
32 #include <stdarg.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <unistd.h>
37 #include <sys/select.h>
38 #include <sys/types.h>
39 #include <sys/wait.h>
40 #include <regex.h>
41 #include <X11/cursorfont.h>
42 #include <X11/keysym.h>
43 #include <X11/Xatom.h>
44 #include <X11/Xproto.h>
45 #include <X11/Xutil.h>
46
47 /* macros */
48 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
49 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
50 #define MOUSEMASK (BUTTONMASK | PointerMotionMask)
51
52 /* enums */
53 enum { BarTop, BarBot, BarOff }; /* bar position */
54 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
55 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
56 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
57 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
58
59 typedef struct {
60 int x, y, w, h;
61 unsigned long norm[ColLast];
62 unsigned long sel[ColLast];
63 Drawable drawable;
64 GC gc;
65 struct {
66 int ascent;
67 int descent;
68 int height;
69 XFontSet set;
70 XFontStruct *xfont;
71 } font;
72 } DC; /* draw context */
73
74 typedef struct {
75 unsigned long mod;
76 KeySym keysym;
77 void (*func)(const char *arg);
78 const char *arg;
79 } Key;
80
81 typedef struct {
82 const char *symbol;
83 void (*arrange)(void);
84 } Layout;
85
86 typedef struct {
87 const char *prop;
88 const char *tags;
89 Bool isfloating;
90 } Rule;
91
92 typedef struct {
93 regex_t *propregex;
94 regex_t *tagregex;
95 } Regs;
96
97 /* forward declarations */
98 void applyrules(Client *c);
99 void arrange(void);
100 void attach(Client *c);
101 void attachstack(Client *c);
102 void ban(Client *c);
103 void buttonpress(XEvent *e);
104 void checkotherwm(void);
105 void cleanup(void);
106 void compileregs(void);
107 void configure(Client *c);
108 void configurenotify(XEvent *e);
109 void configurerequest(XEvent *e);
110 void destroynotify(XEvent *e);
111 void detach(Client *c);
112 void detachstack(Client *c);
113 void drawbar(void);
114 void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
115 void drawtext(const char *text, unsigned long col[ColLast]);
116 void *emallocz(unsigned int size);
117 void enternotify(XEvent *e);
118 void eprint(const char *errstr, ...);
119 void expose(XEvent *e);
120 void floating(void); /* default floating layout */
121 void focus(Client *c);
122 void focusnext(const char *arg);
123 void focusprev(const char *arg);
124 Client *getclient(Window w);
125 unsigned long getcolor(const char *colstr);
126 long getstate(Window w);
127 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
128 void grabbuttons(Client *c, Bool focused);
129 unsigned int idxoftag(const char *tag);
130 void initfont(const char *fontstr);
131 Bool isarrange(void (*func)());
132 Bool isoccupied(unsigned int t);
133 Bool isprotodel(Client *c);
134 Bool isvisible(Client *c);
135 void keypress(XEvent *e);
136 void killclient(const char *arg);
137 void leavenotify(XEvent *e);
138 void manage(Window w, XWindowAttributes *wa);
139 void mappingnotify(XEvent *e);
140 void maprequest(XEvent *e);
141 void movemouse(Client *c);
142 Client *nexttiled(Client *c);
143 void propertynotify(XEvent *e);
144 void quit(const char *arg);
145 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
146 void resizemouse(Client *c);
147 void restack(void);
148 void run(void);
149 void scan(void);
150 void setclientstate(Client *c, long state);
151 void setlayout(const char *arg);
152 void setmwfact(const char *arg);
153 void setup(void);
154 void spawn(const char *arg);
155 void tag(const char *arg);
156 unsigned int textnw(const char *text, unsigned int len);
157 unsigned int textw(const char *text);
158 void tile(void);
159 void togglebar(const char *arg);
160 void togglefloating(const char *arg);
161 void togglemax(const char *arg);
162 void toggletag(const char *arg);
163 void toggleview(const char *arg);
164 void unban(Client *c);
165 void unmanage(Client *c);
166 void unmapnotify(XEvent *e);
167 void updatebarpos(void);
168 void updatesizehints(Client *c);
169 void updatetitle(Client *c);
170 void view(const char *arg);
171 void viewprevtag(const char *arg); /* views previous selected tags */
172 int xerror(Display *dpy, XErrorEvent *ee);
173 int xerrordummy(Display *dsply, XErrorEvent *ee);
174 int xerrorstart(Display *dsply, XErrorEvent *ee);
175 void zoom(const char *arg);
176
177 /* variables */
178 char stext[256];
179 double mwfact;
180 int screen, sx, sy, sw, sh, wax, way, waw, wah;
181 int (*xerrorxlib)(Display *, XErrorEvent *);
182 unsigned int bh, bpos;
183 unsigned int blw = 0;
184 unsigned int ltidx = 0; /* default */
185 unsigned int nlayouts = 0;
186 unsigned int nrules = 0;
187 unsigned int numlockmask = 0;
188 void (*handler[LASTEvent]) (XEvent *) = {
189 [ButtonPress] = buttonpress,
190 [ConfigureRequest] = configurerequest,
191 [ConfigureNotify] = configurenotify,
192 [DestroyNotify] = destroynotify,
193 [EnterNotify] = enternotify,
194 [LeaveNotify] = leavenotify,
195 [Expose] = expose,
196 [KeyPress] = keypress,
197 [MappingNotify] = mappingnotify,
198 [MapRequest] = maprequest,
199 [PropertyNotify] = propertynotify,
200 [UnmapNotify] = unmapnotify
201 };
202 Atom wmatom[WMLast], netatom[NetLast];
203 Bool otherwm, readin;
204 Bool running = True;
205 Bool selscreen = True;
206 Client *clients = NULL;
207 Client *sel = NULL;
208 Client *stack = NULL;
209 Cursor cursor[CurLast];
210 Display *dpy;
211 DC dc = {0};
212 Window barwin, root;
213 Regs *regs = NULL;
214
215 /* configuration, allows nested code to access above variables */
216 #include "config.h"
217
218 /* Statically define the number of tags. */
219 unsigned int ntags = sizeof tags / sizeof tags[0];
220 Bool seltags[sizeof tags / sizeof tags[0]] = {[0] = True};
221 Bool prevtags[sizeof tags / sizeof tags[0]] = {[0] = True};
222
223 /* functions*/
224 void
225 applyrules(Client *c) {
226 static char buf[512];
227 unsigned int i, j;
228 regmatch_t tmp;
229 Bool matched = False;
230 XClassHint ch = { 0 };
231
232 /* rule matching */
233 XGetClassHint(dpy, c->win, &ch);
234 snprintf(buf, sizeof buf, "%s:%s:%s",
235 ch.res_class ? ch.res_class : "",
236 ch.res_name ? ch.res_name : "", c->name);
237 for(i = 0; i < nrules; i++)
238 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
239 c->isfloating = rules[i].isfloating;
240 for(j = 0; regs[i].tagregex && j < ntags; j++) {
241 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
242 matched = True;
243 c->tags[j] = True;
244 }
245 }
246 }
247 if(ch.res_class)
248 XFree(ch.res_class);
249 if(ch.res_name)
250 XFree(ch.res_name);
251 if(!matched)
252 memcpy(c->tags, seltags, sizeof seltags);
253 }
254
255 void
256 arrange(void) {
257 Client *c;
258
259 for(c = clients; c; c = c->next)
260 if(isvisible(c))
261 unban(c);
262 else
263 ban(c);
264 layouts[ltidx].arrange();
265 focus(NULL);
266 restack();
267 }
268
269 void
270 attach(Client *c) {
271 if(clients)
272 clients->prev = c;
273 c->next = clients;
274 clients = c;
275 }
276
277 void
278 attachstack(Client *c) {
279 c->snext = stack;
280 stack = c;
281 }
282
283 void
284 ban(Client *c) {
285 if(c->isbanned)
286 return;
287 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
288 c->isbanned = True;
289 }
290
291 void
292 buttonpress(XEvent *e) {
293 unsigned int i, x;
294 Client *c;
295 XButtonPressedEvent *ev = &e->xbutton;
296
297 if(barwin == ev->window) {
298 x = 0;
299 for(i = 0; i < ntags; i++) {
300 x += textw(tags[i]);
301 if(ev->x < x) {
302 if(ev->button == Button1) {
303 if(ev->state & MODKEY)
304 tag(tags[i]);
305 else
306 view(tags[i]);
307 }
308 else if(ev->button == Button3) {
309 if(ev->state & MODKEY)
310 toggletag(tags[i]);
311 else
312 toggleview(tags[i]);
313 }
314 return;
315 }
316 }
317 if((ev->x < x + blw) && ev->button == Button1)
318 setlayout(NULL);
319 }
320 else if((c = getclient(ev->window))) {
321 focus(c);
322 if(CLEANMASK(ev->state) != MODKEY)
323 return;
324 if(ev->button == Button1) {
325 if(isarrange(floating) || c->isfloating)
326 restack();
327 else
328 togglefloating(NULL);
329 movemouse(c);
330 }
331 else if(ev->button == Button2) {
332 if(ISTILE && !c->isfixed && c->isfloating)
333 togglefloating(NULL);
334 else
335 zoom(NULL);
336 }
337 else if(ev->button == Button3 && !c->isfixed) {
338 if(isarrange(floating) || c->isfloating)
339 restack();
340 else
341 togglefloating(NULL);
342 resizemouse(c);
343 }
344 }
345 }
346
347 void
348 checkotherwm(void) {
349 otherwm = False;
350 XSetErrorHandler(xerrorstart);
351
352 /* this causes an error if some other window manager is running */
353 XSelectInput(dpy, root, SubstructureRedirectMask);
354 XSync(dpy, False);
355 if(otherwm)
356 eprint("dwm: another window manager is already running\n");
357 XSync(dpy, False);
358 XSetErrorHandler(NULL);
359 xerrorxlib = XSetErrorHandler(xerror);
360 XSync(dpy, False);
361 }
362
363 void
364 cleanup(void) {
365 close(STDIN_FILENO);
366 while(stack) {
367 unban(stack);
368 unmanage(stack);
369 }
370 if(dc.font.set)
371 XFreeFontSet(dpy, dc.font.set);
372 else
373 XFreeFont(dpy, dc.font.xfont);
374 XUngrabKey(dpy, AnyKey, AnyModifier, root);
375 XFreePixmap(dpy, dc.drawable);
376 XFreeGC(dpy, dc.gc);
377 XDestroyWindow(dpy, barwin);
378 XFreeCursor(dpy, cursor[CurNormal]);
379 XFreeCursor(dpy, cursor[CurResize]);
380 XFreeCursor(dpy, cursor[CurMove]);
381 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
382 XSync(dpy, False);
383 }
384
385 void
386 compileregs(void) {
387 unsigned int i;
388 regex_t *reg;
389
390 if(regs)
391 return;
392 nrules = sizeof rules / sizeof rules[0];
393 regs = emallocz(nrules * sizeof(Regs));
394 for(i = 0; i < nrules; i++) {
395 if(rules[i].prop) {
396 reg = emallocz(sizeof(regex_t));
397 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
398 free(reg);
399 else
400 regs[i].propregex = reg;
401 }
402 if(rules[i].tags) {
403 reg = emallocz(sizeof(regex_t));
404 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
405 free(reg);
406 else
407 regs[i].tagregex = reg;
408 }
409 }
410 }
411
412 void
413 configure(Client *c) {
414 XConfigureEvent ce;
415
416 ce.type = ConfigureNotify;
417 ce.display = dpy;
418 ce.event = c->win;
419 ce.window = c->win;
420 ce.x = c->x;
421 ce.y = c->y;
422 ce.width = c->w;
423 ce.height = c->h;
424 ce.border_width = c->border;
425 ce.above = None;
426 ce.override_redirect = False;
427 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
428 }
429
430 void
431 configurenotify(XEvent *e) {
432 XConfigureEvent *ev = &e->xconfigure;
433
434 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
435 sw = ev->width;
436 sh = ev->height;
437 XFreePixmap(dpy, dc.drawable);
438 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
439 XResizeWindow(dpy, barwin, sw, bh);
440 updatebarpos();
441 arrange();
442 }
443 }
444
445 void
446 configurerequest(XEvent *e) {
447 Client *c;
448 XConfigureRequestEvent *ev = &e->xconfigurerequest;
449 XWindowChanges wc;
450
451 if((c = getclient(ev->window))) {
452 c->ismax = False;
453 if(ev->value_mask & CWBorderWidth)
454 c->border = ev->border_width;
455 if(c->isfixed || c->isfloating || isarrange(floating)) {
456 if(ev->value_mask & CWX)
457 c->x = ev->x;
458 if(ev->value_mask & CWY)
459 c->y = ev->y;
460 if(ev->value_mask & CWWidth)
461 c->w = ev->width;
462 if(ev->value_mask & CWHeight)
463 c->h = ev->height;
464 if((c->x + c->w) > sw && c->isfloating)
465 c->x = sw / 2 - c->w / 2; /* center in x direction */
466 if((c->y + c->h) > sh && c->isfloating)
467 c->y = sh / 2 - c->h / 2; /* center in y direction */
468 if((ev->value_mask & (CWX | CWY))
469 && !(ev->value_mask & (CWWidth | CWHeight)))
470 configure(c);
471 if(isvisible(c))
472 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
473 }
474 else
475 configure(c);
476 }
477 else {
478 wc.x = ev->x;
479 wc.y = ev->y;
480 wc.width = ev->width;
481 wc.height = ev->height;
482 wc.border_width = ev->border_width;
483 wc.sibling = ev->above;
484 wc.stack_mode = ev->detail;
485 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
486 }
487 XSync(dpy, False);
488 }
489
490 void
491 destroynotify(XEvent *e) {
492 Client *c;
493 XDestroyWindowEvent *ev = &e->xdestroywindow;
494
495 if((c = getclient(ev->window)))
496 unmanage(c);
497 }
498
499 void
500 detach(Client *c) {
501 if(c->prev)
502 c->prev->next = c->next;
503 if(c->next)
504 c->next->prev = c->prev;
505 if(c == clients)
506 clients = c->next;
507 c->next = c->prev = NULL;
508 }
509
510 void
511 detachstack(Client *c) {
512 Client **tc;
513
514 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
515 *tc = c->snext;
516 }
517
518 void
519 drawbar(void) {
520 int i, x;
521
522 dc.x = dc.y = 0;
523 for(i = 0; i < ntags; i++) {
524 dc.w = textw(tags[i]);
525 if(seltags[i]) {
526 drawtext(tags[i], dc.sel);
527 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
528 }
529 else {
530 drawtext(tags[i], dc.norm);
531 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
532 }
533 dc.x += dc.w;
534 }
535 dc.w = blw;
536 drawtext(layouts[ltidx].symbol, dc.norm);
537 x = dc.x + dc.w;
538 dc.w = textw(stext);
539 dc.x = sw - dc.w;
540 if(dc.x < x) {
541 dc.x = x;
542 dc.w = sw - x;
543 }
544 drawtext(stext, dc.norm);
545 if((dc.w = dc.x - x) > bh) {
546 dc.x = x;
547 if(sel) {
548 drawtext(sel->name, dc.sel);
549 drawsquare(sel->ismax, sel->isfloating, dc.sel);
550 }
551 else
552 drawtext(NULL, dc.norm);
553 }
554 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
555 XSync(dpy, False);
556 }
557
558 void
559 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
560 int x;
561 XGCValues gcv;
562 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
563
564 gcv.foreground = col[ColFG];
565 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
566 x = (dc.font.ascent + dc.font.descent + 2) / 4;
567 r.x = dc.x + 1;
568 r.y = dc.y + 1;
569 if(filled) {
570 r.width = r.height = x + 1;
571 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
572 }
573 else if(empty) {
574 r.width = r.height = x;
575 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
576 }
577 }
578
579 void
580 drawtext(const char *text, unsigned long col[ColLast]) {
581 int x, y, w, h;
582 static char buf[256];
583 unsigned int len, olen;
584 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
585
586 XSetForeground(dpy, dc.gc, col[ColBG]);
587 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
588 if(!text)
589 return;
590 w = 0;
591 olen = len = strlen(text);
592 if(len >= sizeof buf)
593 len = sizeof buf - 1;
594 memcpy(buf, text, len);
595 buf[len] = 0;
596 h = dc.font.ascent + dc.font.descent;
597 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
598 x = dc.x + (h / 2);
599 /* shorten text if necessary */
600 while(len && (w = textnw(buf, len)) > dc.w - h)
601 buf[--len] = 0;
602 if(len < olen) {
603 if(len > 1)
604 buf[len - 1] = '.';
605 if(len > 2)
606 buf[len - 2] = '.';
607 if(len > 3)
608 buf[len - 3] = '.';
609 }
610 if(w > dc.w)
611 return; /* too long */
612 XSetForeground(dpy, dc.gc, col[ColFG]);
613 if(dc.font.set)
614 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
615 else
616 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
617 }
618
619 void *
620 emallocz(unsigned int size) {
621 void *res = calloc(1, size);
622
623 if(!res)
624 eprint("fatal: could not malloc() %u bytes\n", size);
625 return res;
626 }
627
628 void
629 enternotify(XEvent *e) {
630 Client *c;
631 XCrossingEvent *ev = &e->xcrossing;
632
633 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
634 return;
635 if((c = getclient(ev->window)))
636 focus(c);
637 else if(ev->window == root) {
638 selscreen = True;
639 focus(NULL);
640 }
641 }
642
643 void
644 eprint(const char *errstr, ...) {
645 va_list ap;
646
647 va_start(ap, errstr);
648 vfprintf(stderr, errstr, ap);
649 va_end(ap);
650 exit(EXIT_FAILURE);
651 }
652
653 void
654 expose(XEvent *e) {
655 XExposeEvent *ev = &e->xexpose;
656
657 if(ev->count == 0) {
658 if(barwin == ev->window)
659 drawbar();
660 }
661 }
662
663 void
664 floating(void) { /* default floating layout */
665 Client *c;
666
667 for(c = clients; c; c = c->next)
668 if(isvisible(c))
669 resize(c, c->x, c->y, c->w, c->h, True);
670 }
671
672 void
673 focus(Client *c) {
674 if((!c && selscreen) || (c && !isvisible(c)))
675 for(c = stack; c && !isvisible(c); c = c->snext);
676 if(sel && sel != c) {
677 grabbuttons(sel, False);
678 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
679 }
680 if(c) {
681 detachstack(c);
682 attachstack(c);
683 grabbuttons(c, True);
684 }
685 sel = c;
686 drawbar();
687 if(!selscreen)
688 return;
689 if(c) {
690 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
691 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
692 }
693 else
694 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
695 }
696
697 void
698 focusnext(const char *arg) {
699 Client *c;
700
701 if(!sel)
702 return;
703 for(c = sel->next; c && !isvisible(c); c = c->next);
704 if(!c)
705 for(c = clients; c && !isvisible(c); c = c->next);
706 if(c) {
707 focus(c);
708 restack();
709 }
710 }
711
712 void
713 focusprev(const char *arg) {
714 Client *c;
715
716 if(!sel)
717 return;
718 for(c = sel->prev; c && !isvisible(c); c = c->prev);
719 if(!c) {
720 for(c = clients; c && c->next; c = c->next);
721 for(; c && !isvisible(c); c = c->prev);
722 }
723 if(c) {
724 focus(c);
725 restack();
726 }
727 }
728
729 Client *
730 getclient(Window w) {
731 Client *c;
732
733 for(c = clients; c && c->win != w; c = c->next);
734 return c;
735 }
736
737 unsigned long
738 getcolor(const char *colstr) {
739 Colormap cmap = DefaultColormap(dpy, screen);
740 XColor color;
741
742 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
743 eprint("error, cannot allocate color '%s'\n", colstr);
744 return color.pixel;
745 }
746
747 long
748 getstate(Window w) {
749 int format, status;
750 long result = -1;
751 unsigned char *p = NULL;
752 unsigned long n, extra;
753 Atom real;
754
755 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
756 &real, &format, &n, &extra, (unsigned char **)&p);
757 if(status != Success)
758 return -1;
759 if(n != 0)
760 result = *p;
761 XFree(p);
762 return result;
763 }
764
765 Bool
766 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
767 char **list = NULL;
768 int n;
769 XTextProperty name;
770
771 if(!text || size == 0)
772 return False;
773 text[0] = '\0';
774 XGetTextProperty(dpy, w, &name, atom);
775 if(!name.nitems)
776 return False;
777 if(name.encoding == XA_STRING)
778 strncpy(text, (char *)name.value, size - 1);
779 else {
780 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
781 && n > 0 && *list)
782 {
783 strncpy(text, *list, size - 1);
784 XFreeStringList(list);
785 }
786 }
787 text[size - 1] = '\0';
788 XFree(name.value);
789 return True;
790 }
791
792 void
793 grabbuttons(Client *c, Bool focused) {
794 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
795
796 if(focused) {
797 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
798 GrabModeAsync, GrabModeSync, None, None);
799 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
800 GrabModeAsync, GrabModeSync, None, None);
801 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
802 GrabModeAsync, GrabModeSync, None, None);
803 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
804 GrabModeAsync, GrabModeSync, None, None);
805
806 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
807 GrabModeAsync, GrabModeSync, None, None);
808 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
809 GrabModeAsync, GrabModeSync, None, None);
810 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
811 GrabModeAsync, GrabModeSync, None, None);
812 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
813 GrabModeAsync, GrabModeSync, None, None);
814
815 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
816 GrabModeAsync, GrabModeSync, None, None);
817 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
818 GrabModeAsync, GrabModeSync, None, None);
819 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
820 GrabModeAsync, GrabModeSync, None, None);
821 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
822 GrabModeAsync, GrabModeSync, None, None);
823 }
824 else
825 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
826 GrabModeAsync, GrabModeSync, None, None);
827 }
828
829 unsigned int
830 idxoftag(const char *tag) {
831 unsigned int i;
832
833 for(i = 0; i < ntags; i++)
834 if(tags[i] == tag)
835 return i;
836 return 0;
837 }
838
839 void
840 initfont(const char *fontstr) {
841 char *def, **missing;
842 int i, n;
843
844 missing = NULL;
845 if(dc.font.set)
846 XFreeFontSet(dpy, dc.font.set);
847 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
848 if(missing) {
849 while(n--)
850 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
851 XFreeStringList(missing);
852 }
853 if(dc.font.set) {
854 XFontSetExtents *font_extents;
855 XFontStruct **xfonts;
856 char **font_names;
857 dc.font.ascent = dc.font.descent = 0;
858 font_extents = XExtentsOfFontSet(dc.font.set);
859 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
860 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
861 if(dc.font.ascent < (*xfonts)->ascent)
862 dc.font.ascent = (*xfonts)->ascent;
863 if(dc.font.descent < (*xfonts)->descent)
864 dc.font.descent = (*xfonts)->descent;
865 xfonts++;
866 }
867 }
868 else {
869 if(dc.font.xfont)
870 XFreeFont(dpy, dc.font.xfont);
871 dc.font.xfont = NULL;
872 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
873 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
874 eprint("error, cannot load font: '%s'\n", fontstr);
875 dc.font.ascent = dc.font.xfont->ascent;
876 dc.font.descent = dc.font.xfont->descent;
877 }
878 dc.font.height = dc.font.ascent + dc.font.descent;
879 }
880
881 Bool
882 isarrange(void (*func)())
883 {
884 return func == layouts[ltidx].arrange;
885 }
886
887 Bool
888 isoccupied(unsigned int t) {
889 Client *c;
890
891 for(c = clients; c; c = c->next)
892 if(c->tags[t])
893 return True;
894 return False;
895 }
896
897 Bool
898 isprotodel(Client *c) {
899 int i, n;
900 Atom *protocols;
901 Bool ret = False;
902
903 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
904 for(i = 0; !ret && i < n; i++)
905 if(protocols[i] == wmatom[WMDelete])
906 ret = True;
907 XFree(protocols);
908 }
909 return ret;
910 }
911
912 Bool
913 isvisible(Client *c) {
914 unsigned int i;
915
916 for(i = 0; i < ntags; i++)
917 if(c->tags[i] && seltags[i])
918 return True;
919 return False;
920 }
921
922 void
923 keypress(XEvent *e) {
924 KEYS
925 unsigned int len = sizeof keys / sizeof keys[0];
926 unsigned int i;
927 KeyCode code;
928 KeySym keysym;
929 XKeyEvent *ev;
930
931 if(!e) { /* grabkeys */
932 XUngrabKey(dpy, AnyKey, AnyModifier, root);
933 for(i = 0; i < len; i++) {
934 code = XKeysymToKeycode(dpy, keys[i].keysym);
935 XGrabKey(dpy, code, keys[i].mod, root, True,
936 GrabModeAsync, GrabModeAsync);
937 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
938 GrabModeAsync, GrabModeAsync);
939 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
940 GrabModeAsync, GrabModeAsync);
941 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
942 GrabModeAsync, GrabModeAsync);
943 }
944 return;
945 }
946 ev = &e->xkey;
947 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
948 for(i = 0; i < len; i++)
949 if(keysym == keys[i].keysym
950 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
951 {
952 if(keys[i].func)
953 keys[i].func(keys[i].arg);
954 }
955 }
956
957 void
958 killclient(const char *arg) {
959 XEvent ev;
960
961 if(!sel)
962 return;
963 if(isprotodel(sel)) {
964 ev.type = ClientMessage;
965 ev.xclient.window = sel->win;
966 ev.xclient.message_type = wmatom[WMProtocols];
967 ev.xclient.format = 32;
968 ev.xclient.data.l[0] = wmatom[WMDelete];
969 ev.xclient.data.l[1] = CurrentTime;
970 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
971 }
972 else
973 XKillClient(dpy, sel->win);
974 }
975
976 void
977 leavenotify(XEvent *e) {
978 XCrossingEvent *ev = &e->xcrossing;
979
980 if((ev->window == root) && !ev->same_screen) {
981 selscreen = False;
982 focus(NULL);
983 }
984 }
985
986 void
987 manage(Window w, XWindowAttributes *wa) {
988 Client *c, *t = NULL;
989 Window trans;
990 Status rettrans;
991 XWindowChanges wc;
992
993 c = emallocz(sizeof(Client));
994 c->tags = emallocz(sizeof seltags);
995 c->win = w;
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 > wax + waw)
1008 c->x = wax + waw - c->w - 2 * c->border;
1009 if(c->y + c->h + 2 * c->border > way + wah)
1010 c->y = way + wah - c->h - 2 * c->border;
1011 if(c->x < wax)
1012 c->x = wax;
1013 if(c->y < way)
1014 c->y = way;
1015 c->border = BORDERPX;
1016 }
1017 wc.border_width = c->border;
1018 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1019 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1020 configure(c); /* propagates border_width, if size doesn't change */
1021 updatesizehints(c);
1022 XSelectInput(dpy, w,
1023 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
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, sizeof seltags);
1030 applyrules(c);
1031 if(!c->isfloating)
1032 c->isfloating = (rettrans == Success) || c->isfixed;
1033 attach(c);
1034 attachstack(c);
1035 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1036 ban(c);
1037 XMapWindow(dpy, c->win);
1038 setclientstate(c, NormalState);
1039 arrange();
1040 }
1041
1042 void
1043 mappingnotify(XEvent *e) {
1044 XMappingEvent *ev = &e->xmapping;
1045
1046 XRefreshKeyboardMapping(ev);
1047 if(ev->request == MappingKeyboard)
1048 keypress(NULL);
1049 }
1050
1051 void
1052 maprequest(XEvent *e) {
1053 static XWindowAttributes wa;
1054 XMapRequestEvent *ev = &e->xmaprequest;
1055
1056 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1057 return;
1058 if(wa.override_redirect)
1059 return;
1060 if(!getclient(ev->window))
1061 manage(ev->window, &wa);
1062 }
1063
1064 void
1065 movemouse(Client *c) {
1066 int x1, y1, ocx, ocy, di, nx, ny;
1067 unsigned int dui;
1068 Window dummy;
1069 XEvent ev;
1070
1071 ocx = nx = c->x;
1072 ocy = ny = c->y;
1073 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1074 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1075 return;
1076 c->ismax = False;
1077 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1078 for(;;) {
1079 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1080 switch (ev.type) {
1081 case ButtonRelease:
1082 XUngrabPointer(dpy, CurrentTime);
1083 return;
1084 case ConfigureRequest:
1085 case Expose:
1086 case MapRequest:
1087 handler[ev.type](&ev);
1088 break;
1089 case MotionNotify:
1090 XSync(dpy, False);
1091 nx = ocx + (ev.xmotion.x - x1);
1092 ny = ocy + (ev.xmotion.y - y1);
1093 if(abs(wax + nx) < SNAP)
1094 nx = wax;
1095 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1096 nx = wax + waw - c->w - 2 * c->border;
1097 if(abs(way - ny) < SNAP)
1098 ny = way;
1099 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1100 ny = way + wah - c->h - 2 * c->border;
1101 resize(c, nx, ny, c->w, c->h, False);
1102 break;
1103 }
1104 }
1105 }
1106
1107 Client *
1108 nexttiled(Client *c) {
1109 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1110 return c;
1111 }
1112
1113 void
1114 propertynotify(XEvent *e) {
1115 Client *c;
1116 Window trans;
1117 XPropertyEvent *ev = &e->xproperty;
1118
1119 if(ev->state == PropertyDelete)
1120 return; /* ignore */
1121 if((c = getclient(ev->window))) {
1122 switch (ev->atom) {
1123 default: break;
1124 case XA_WM_TRANSIENT_FOR:
1125 XGetTransientForHint(dpy, c->win, &trans);
1126 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1127 arrange();
1128 break;
1129 case XA_WM_NORMAL_HINTS:
1130 updatesizehints(c);
1131 break;
1132 }
1133 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1134 updatetitle(c);
1135 if(c == sel)
1136 drawbar();
1137 }
1138 }
1139 }
1140
1141 void
1142 quit(const char *arg) {
1143 readin = running = False;
1144 }
1145
1146 void
1147 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1148 double dx, dy, max, min, ratio;
1149 XWindowChanges wc;
1150
1151 if(sizehints) {
1152 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
1153 dx = (double)(w - c->basew);
1154 dy = (double)(h - c->baseh);
1155 min = (double)(c->minax) / (double)(c->minay);
1156 max = (double)(c->maxax) / (double)(c->maxay);
1157 ratio = dx / dy;
1158 if(max > 0 && min > 0 && ratio > 0) {
1159 if(ratio < min) {
1160 dy = (dx * min + dy) / (min * min + 1);
1161 dx = dy * min;
1162 w = (int)dx + c->basew;
1163 h = (int)dy + c->baseh;
1164 }
1165 else if(ratio > max) {
1166 dy = (dx * min + dy) / (max * max + 1);
1167 dx = dy * min;
1168 w = (int)dx + c->basew;
1169 h = (int)dy + c->baseh;
1170 }
1171 }
1172 }
1173 if(c->minw && w < c->minw)
1174 w = c->minw;
1175 if(c->minh && h < c->minh)
1176 h = c->minh;
1177 if(c->maxw && w > c->maxw)
1178 w = c->maxw;
1179 if(c->maxh && h > c->maxh)
1180 h = c->maxh;
1181 if(c->incw)
1182 w -= (w - c->basew) % c->incw;
1183 if(c->inch)
1184 h -= (h - c->baseh) % c->inch;
1185 }
1186 if(w <= 0 || h <= 0)
1187 return;
1188 /* offscreen appearance fixes */
1189 if(x > sw)
1190 x = sw - w - 2 * c->border;
1191 if(y > sh)
1192 y = sh - h - 2 * c->border;
1193 if(x + w + 2 * c->border < sx)
1194 x = sx;
1195 if(y + h + 2 * c->border < sy)
1196 y = sy;
1197 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1198 c->x = wc.x = x;
1199 c->y = wc.y = y;
1200 c->w = wc.width = w;
1201 c->h = wc.height = h;
1202 wc.border_width = c->border;
1203 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1204 configure(c);
1205 XSync(dpy, False);
1206 }
1207 }
1208
1209 void
1210 resizemouse(Client *c) {
1211 int ocx, ocy;
1212 int nw, nh;
1213 XEvent ev;
1214
1215 ocx = c->x;
1216 ocy = c->y;
1217 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1218 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1219 return;
1220 c->ismax = False;
1221 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1222 for(;;) {
1223 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1224 switch(ev.type) {
1225 case ButtonRelease:
1226 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1227 c->w + c->border - 1, c->h + c->border - 1);
1228 XUngrabPointer(dpy, CurrentTime);
1229 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1230 return;
1231 case ConfigureRequest:
1232 case Expose:
1233 case MapRequest:
1234 handler[ev.type](&ev);
1235 break;
1236 case MotionNotify:
1237 XSync(dpy, False);
1238 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1239 nw = 1;
1240 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1241 nh = 1;
1242 resize(c, c->x, c->y, nw, nh, True);
1243 break;
1244 }
1245 }
1246 }
1247
1248 void
1249 restack(void) {
1250 Client *c;
1251 XEvent ev;
1252 XWindowChanges wc;
1253
1254 drawbar();
1255 if(!sel)
1256 return;
1257 if(sel->isfloating || isarrange(floating))
1258 XRaiseWindow(dpy, sel->win);
1259 if(!isarrange(floating)) {
1260 wc.stack_mode = Below;
1261 wc.sibling = barwin;
1262 if(!sel->isfloating) {
1263 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1264 wc.sibling = sel->win;
1265 }
1266 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1267 if(c == sel)
1268 continue;
1269 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1270 wc.sibling = c->win;
1271 }
1272 }
1273 XSync(dpy, False);
1274 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1275 }
1276
1277 void
1278 run(void) {
1279 char *p;
1280 int r, xfd;
1281 fd_set rd;
1282 XEvent ev;
1283
1284 /* main event loop, also reads status text from stdin */
1285 XSync(dpy, False);
1286 xfd = ConnectionNumber(dpy);
1287 readin = True;
1288 while(running) {
1289 FD_ZERO(&rd);
1290 if(readin)
1291 FD_SET(STDIN_FILENO, &rd);
1292 FD_SET(xfd, &rd);
1293 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1294 if(errno == EINTR)
1295 continue;
1296 eprint("select failed\n");
1297 }
1298 if(FD_ISSET(STDIN_FILENO, &rd)) {
1299 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1300 case -1:
1301 strncpy(stext, strerror(errno), sizeof stext - 1);
1302 stext[sizeof stext - 1] = '\0';
1303 readin = False;
1304 break;
1305 case 0:
1306 strncpy(stext, "EOF", 4);
1307 readin = False;
1308 break;
1309 default:
1310 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1311 for(; p >= stext && *p != '\n'; --p);
1312 if(p > stext)
1313 strncpy(stext, p + 1, sizeof stext);
1314 }
1315 drawbar();
1316 }
1317 while(XPending(dpy)) {
1318 XNextEvent(dpy, &ev);
1319 if(handler[ev.type])
1320 (handler[ev.type])(&ev); /* call handler */
1321 }
1322 }
1323 }
1324
1325 void
1326 scan(void) {
1327 unsigned int i, num;
1328 Window *wins, d1, d2;
1329 XWindowAttributes wa;
1330
1331 wins = NULL;
1332 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1333 for(i = 0; i < num; i++) {
1334 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1335 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1336 continue;
1337 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1338 manage(wins[i], &wa);
1339 }
1340 for(i = 0; i < num; i++) { /* now the transients */
1341 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1342 continue;
1343 if(XGetTransientForHint(dpy, wins[i], &d1)
1344 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1345 manage(wins[i], &wa);
1346 }
1347 }
1348 if(wins)
1349 XFree(wins);
1350 }
1351
1352 void
1353 setclientstate(Client *c, long state) {
1354 long data[] = {state, None};
1355
1356 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1357 PropModeReplace, (unsigned char *)data, 2);
1358 }
1359
1360 void
1361 setlayout(const char *arg) {
1362 unsigned int i;
1363
1364 if(!arg) {
1365 if(++ltidx == nlayouts)
1366 ltidx = 0;;
1367 }
1368 else {
1369 for(i = 0; i < nlayouts; i++)
1370 if(!strcmp(arg, layouts[i].symbol))
1371 break;
1372 if(i == nlayouts)
1373 return;
1374 ltidx = i;
1375 }
1376 if(sel)
1377 arrange();
1378 else
1379 drawbar();
1380 }
1381
1382 void
1383 setmwfact(const char *arg) {
1384 double delta;
1385
1386 if(!ISTILE)
1387 return;
1388 /* arg handling, manipulate mwfact */
1389 if(arg == NULL)
1390 mwfact = MWFACT;
1391 else if(1 == sscanf(arg, "%lf", &delta)) {
1392 if(arg[0] == '+' || arg[0] == '-')
1393 mwfact += delta;
1394 else
1395 mwfact = delta;
1396 if(mwfact < 0.1)
1397 mwfact = 0.1;
1398 else if(mwfact > 0.9)
1399 mwfact = 0.9;
1400 }
1401 arrange();
1402 }
1403
1404 void
1405 setup(void) {
1406 int d;
1407 unsigned int i, j, mask;
1408 Window w;
1409 XModifierKeymap *modmap;
1410 XSetWindowAttributes wa;
1411
1412 /* init atoms */
1413 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1414 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1415 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1416 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1417 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1418 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1419 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1420 PropModeReplace, (unsigned char *) netatom, NetLast);
1421
1422 /* init cursors */
1423 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1424 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1425 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1426
1427 /* init geometry */
1428 sx = sy = 0;
1429 sw = DisplayWidth(dpy, screen);
1430 sh = DisplayHeight(dpy, screen);
1431
1432 /* init modifier map */
1433 modmap = XGetModifierMapping(dpy);
1434 for(i = 0; i < 8; i++)
1435 for(j = 0; j < modmap->max_keypermod; j++) {
1436 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1437 == XKeysymToKeycode(dpy, XK_Num_Lock))
1438 numlockmask = (1 << i);
1439 }
1440 XFreeModifiermap(modmap);
1441
1442 /* select for events */
1443 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1444 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1445 wa.cursor = cursor[CurNormal];
1446 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1447 XSelectInput(dpy, root, wa.event_mask);
1448
1449 /* grab keys */
1450 keypress(NULL);
1451
1452 /* init tags */
1453 compileregs();
1454
1455 /* init appearance */
1456 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1457 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1458 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1459 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1460 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1461 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1462 initfont(FONT);
1463 dc.h = bh = dc.font.height + 2;
1464
1465 /* init layouts */
1466 mwfact = MWFACT;
1467 nlayouts = sizeof layouts / sizeof layouts[0];
1468 for(blw = i = 0; i < nlayouts; i++) {
1469 j = textw(layouts[i].symbol);
1470 if(j > blw)
1471 blw = j;
1472 }
1473
1474 /* init bar */
1475 bpos = BARPOS;
1476 wa.override_redirect = 1;
1477 wa.background_pixmap = ParentRelative;
1478 wa.event_mask = ButtonPressMask | ExposureMask;
1479 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1480 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1481 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1482 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1483 updatebarpos();
1484 XMapRaised(dpy, barwin);
1485 strcpy(stext, "dwm-"VERSION);
1486 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1487 dc.gc = XCreateGC(dpy, root, 0, 0);
1488 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1489 if(!dc.font.set)
1490 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1491
1492 /* multihead support */
1493 selscreen = XQueryPointer(dpy, root, &w, &w, &d, &d, &d, &d, &mask);
1494 }
1495
1496 void
1497 spawn(const char *arg) {
1498 static char *shell = NULL;
1499
1500 if(!shell && !(shell = getenv("SHELL")))
1501 shell = "/bin/sh";
1502 if(!arg)
1503 return;
1504 /* The double-fork construct avoids zombie processes and keeps the code
1505 * clean from stupid signal handlers. */
1506 if(fork() == 0) {
1507 if(fork() == 0) {
1508 if(dpy)
1509 close(ConnectionNumber(dpy));
1510 setsid();
1511 execl(shell, shell, "-c", arg, (char *)NULL);
1512 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1513 perror(" failed");
1514 }
1515 exit(0);
1516 }
1517 wait(0);
1518 }
1519
1520 void
1521 tag(const char *arg) {
1522 unsigned int i;
1523
1524 if(!sel)
1525 return;
1526 for(i = 0; i < ntags; i++)
1527 sel->tags[i] = arg == NULL;
1528 i = idxoftag(arg);
1529 if(i >= 0 && i < ntags)
1530 sel->tags[i] = True;
1531 arrange();
1532 }
1533
1534 unsigned int
1535 textnw(const char *text, unsigned int len) {
1536 XRectangle r;
1537
1538 if(dc.font.set) {
1539 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1540 return r.width;
1541 }
1542 return XTextWidth(dc.font.xfont, text, len);
1543 }
1544
1545 unsigned int
1546 textw(const char *text) {
1547 return textnw(text, strlen(text)) + dc.font.height;
1548 }
1549
1550 void
1551 tile(void) {
1552 unsigned int i, n, nx, ny, nw, nh, mw, th;
1553 Client *c, *mc;
1554
1555 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1556 n++;
1557
1558 /* window geoms */
1559 mw = (n == 1) ? waw : mwfact * waw;
1560 th = (n > 1) ? wah / (n - 1) : 0;
1561 if(n > 1 && th < bh)
1562 th = wah;
1563
1564 nx = wax;
1565 ny = way;
1566 nw = 0; /* gcc stupidity requires this */
1567 for(i = 0, c = mc = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1568 c->ismax = False;
1569 if(i == 0) { /* master */
1570 nw = mw - 2 * c->border;
1571 nh = wah - 2 * c->border;
1572 }
1573 else { /* tile window */
1574 if(i == 1) {
1575 ny = way;
1576 nx += mc->w + 2 * mc->border;
1577 nw = waw - nx - 2 * c->border;
1578 }
1579 if(i + 1 == n) /* remainder */
1580 nh = (way + wah) - ny - 2 * c->border;
1581 else
1582 nh = th - 2 * c->border;
1583 }
1584 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1585 if(n > 1 && th != wah)
1586 ny = c->y + c->h + 2 * c->border;
1587 }
1588 }
1589
1590 void
1591 togglebar(const char *arg) {
1592 if(bpos == BarOff)
1593 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1594 else
1595 bpos = BarOff;
1596 updatebarpos();
1597 arrange();
1598 }
1599
1600 void
1601 togglefloating(const char *arg) {
1602 if(!sel)
1603 return;
1604 sel->isfloating = !sel->isfloating;
1605 if(sel->isfloating)
1606 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1607 arrange();
1608 }
1609
1610 void
1611 togglemax(const char *arg) {
1612 XEvent ev;
1613
1614 if(!sel || sel->isfixed)
1615 return;
1616 if((sel->ismax = !sel->ismax)) {
1617 if(isarrange(floating) || sel->isfloating)
1618 sel->wasfloating = True;
1619 else {
1620 togglefloating(NULL);
1621 sel->wasfloating = False;
1622 }
1623 sel->rx = sel->x;
1624 sel->ry = sel->y;
1625 sel->rw = sel->w;
1626 sel->rh = sel->h;
1627 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1628 }
1629 else {
1630 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1631 if(!sel->wasfloating)
1632 togglefloating(NULL);
1633 }
1634 drawbar();
1635 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1636 }
1637
1638 void
1639 toggletag(const char *arg) {
1640 unsigned int i, j;
1641
1642 if(!sel)
1643 return;
1644 i = idxoftag(arg);
1645 sel->tags[i] = !sel->tags[i];
1646 for(j = 0; j < ntags && !sel->tags[j]; j++);
1647 if(j == ntags)
1648 sel->tags[i] = True;
1649 arrange();
1650 }
1651
1652 void
1653 toggleview(const char *arg) {
1654 unsigned int i, j;
1655
1656 i = idxoftag(arg);
1657 seltags[i] = !seltags[i];
1658 for(j = 0; j < ntags && !seltags[j]; j++);
1659 if(j == ntags)
1660 seltags[i] = True; /* at least one tag must be viewed */
1661 arrange();
1662 }
1663
1664 void
1665 unban(Client *c) {
1666 if(!c->isbanned)
1667 return;
1668 XMoveWindow(dpy, c->win, c->x, c->y);
1669 c->isbanned = False;
1670 }
1671
1672 void
1673 unmanage(Client *c) {
1674 XWindowChanges wc;
1675
1676 wc.border_width = c->oldborder;
1677 /* The server grab construct avoids race conditions. */
1678 XGrabServer(dpy);
1679 XSetErrorHandler(xerrordummy);
1680 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1681 detach(c);
1682 detachstack(c);
1683 if(sel == c)
1684 focus(NULL);
1685 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1686 setclientstate(c, WithdrawnState);
1687 free(c->tags);
1688 free(c);
1689 XSync(dpy, False);
1690 XSetErrorHandler(xerror);
1691 XUngrabServer(dpy);
1692 arrange();
1693 }
1694
1695 void
1696 unmapnotify(XEvent *e) {
1697 Client *c;
1698 XUnmapEvent *ev = &e->xunmap;
1699
1700 if((c = getclient(ev->window)))
1701 unmanage(c);
1702 }
1703
1704 void
1705 updatebarpos(void) {
1706 XEvent ev;
1707
1708 wax = sx;
1709 way = sy;
1710 wah = sh;
1711 waw = sw;
1712 switch(bpos) {
1713 default:
1714 wah -= bh;
1715 way += bh;
1716 XMoveWindow(dpy, barwin, sx, sy);
1717 break;
1718 case BarBot:
1719 wah -= bh;
1720 XMoveWindow(dpy, barwin, sx, sy + wah);
1721 break;
1722 case BarOff:
1723 XMoveWindow(dpy, barwin, sx, sy - bh);
1724 break;
1725 }
1726 XSync(dpy, False);
1727 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1728 }
1729
1730 void
1731 updatesizehints(Client *c) {
1732 long msize;
1733 XSizeHints size;
1734
1735 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1736 size.flags = PSize;
1737 c->flags = size.flags;
1738 if(c->flags & PBaseSize) {
1739 c->basew = size.base_width;
1740 c->baseh = size.base_height;
1741 }
1742 else if(c->flags & PMinSize) {
1743 c->basew = size.min_width;
1744 c->baseh = size.min_height;
1745 }
1746 else
1747 c->basew = c->baseh = 0;
1748 if(c->flags & PResizeInc) {
1749 c->incw = size.width_inc;
1750 c->inch = size.height_inc;
1751 }
1752 else
1753 c->incw = c->inch = 0;
1754 if(c->flags & PMaxSize) {
1755 c->maxw = size.max_width;
1756 c->maxh = size.max_height;
1757 }
1758 else
1759 c->maxw = c->maxh = 0;
1760 if(c->flags & PMinSize) {
1761 c->minw = size.min_width;
1762 c->minh = size.min_height;
1763 }
1764 else if(c->flags & PBaseSize) {
1765 c->minw = size.base_width;
1766 c->minh = size.base_height;
1767 }
1768 else
1769 c->minw = c->minh = 0;
1770 if(c->flags & PAspect) {
1771 c->minax = size.min_aspect.x;
1772 c->maxax = size.max_aspect.x;
1773 c->minay = size.min_aspect.y;
1774 c->maxay = size.max_aspect.y;
1775 }
1776 else
1777 c->minax = c->maxax = c->minay = c->maxay = 0;
1778 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1779 && c->maxw == c->minw && c->maxh == c->minh);
1780 }
1781
1782 void
1783 updatetitle(Client *c) {
1784 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1785 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1786 }
1787
1788 /* There's no way to check accesses to destroyed windows, thus those cases are
1789 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1790 * default error handler, which may call exit. */
1791 int
1792 xerror(Display *dpy, XErrorEvent *ee) {
1793 if(ee->error_code == BadWindow
1794 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1795 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1796 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1797 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1798 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1799 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1800 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1801 return 0;
1802 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1803 ee->request_code, ee->error_code);
1804 return xerrorxlib(dpy, ee); /* may call exit */
1805 }
1806
1807 int
1808 xerrordummy(Display *dsply, XErrorEvent *ee) {
1809 return 0;
1810 }
1811
1812 /* Startup Error handler to check if another window manager
1813 * is already running. */
1814 int
1815 xerrorstart(Display *dsply, XErrorEvent *ee) {
1816 otherwm = True;
1817 return -1;
1818 }
1819
1820 void
1821 view(const char *arg) {
1822 unsigned int i;
1823
1824 memcpy(prevtags, seltags, sizeof seltags);
1825 for(i = 0; i < ntags; i++)
1826 seltags[i] = arg == NULL;
1827 i = idxoftag(arg);
1828 if(i >= 0 && i < ntags)
1829 seltags[i] = True;
1830 arrange();
1831 }
1832
1833 void
1834 viewprevtag(const char *arg) {
1835 static Bool tmptags[sizeof tags / sizeof tags[0]];
1836
1837 memcpy(tmptags, seltags, sizeof seltags);
1838 memcpy(seltags, prevtags, sizeof seltags);
1839 memcpy(prevtags, tmptags, sizeof seltags);
1840 arrange();
1841 }
1842
1843 void
1844 zoom(const char *arg) {
1845 Client *c;
1846
1847 if(!sel || !ISTILE || sel->isfloating)
1848 return;
1849 if((c = sel) == nexttiled(clients))
1850 if(!(c = nexttiled(c->next)))
1851 return;
1852 detach(c);
1853 attach(c);
1854 focus(c);
1855 arrange();
1856 }
1857
1858 int
1859 main(int argc, char *argv[]) {
1860 if(argc == 2 && !strcmp("-v", argv[1]))
1861 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1862 else if(argc != 1)
1863 eprint("usage: dwm [-v]\n");
1864
1865 setlocale(LC_CTYPE, "");
1866 if(!(dpy = XOpenDisplay(0)))
1867 eprint("dwm: cannot open display\n");
1868 screen = DefaultScreen(dpy);
1869 root = RootWindow(dpy, screen);
1870
1871 checkotherwm();
1872 setup();
1873 drawbar();
1874 scan();
1875 run();
1876 cleanup();
1877
1878 XCloseDisplay(dpy);
1879 return 0;
1880 }