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added antoszka's viewprev patch with some minor modifications, restored Client->tags...
[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 <errno.h>
29 #include <locale.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <unistd.h>
35 #include <sys/select.h>
36 #include <sys/types.h>
37 #include <sys/wait.h>
38 #include <regex.h>
39 #include <X11/cursorfont.h>
40 #include <X11/keysym.h>
41 #include <X11/Xatom.h>
42 #include <X11/Xlib.h>
43 #include <X11/Xproto.h>
44 #include <X11/Xutil.h>
45
46 /* macros */
47 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
48 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
49 #define MOUSEMASK (BUTTONMASK | PointerMotionMask)
50
51 /* enums */
52 enum { BarTop, BarBot, BarOff }; /* bar position */
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
61 struct Client {
62 char name[256];
63 int x, y, w, h;
64 int rx, ry, rw, rh; /* revert geometry */
65 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
66 int minax, maxax, minay, maxay;
67 long flags;
68 unsigned int border, oldborder;
69 Bool isbanned, isfixed, ismax, isfloating, wasfloating;
70 Bool *tags;
71 Client *next;
72 Client *prev;
73 Client *snext;
74 Window win;
75 };
76
77 typedef struct {
78 int x, y, w, h;
79 unsigned long norm[ColLast];
80 unsigned long sel[ColLast];
81 Drawable drawable;
82 GC gc;
83 struct {
84 int ascent;
85 int descent;
86 int height;
87 XFontSet set;
88 XFontStruct *xfont;
89 } font;
90 } DC; /* draw context */
91
92 typedef struct {
93 unsigned long mod;
94 KeySym keysym;
95 void (*func)(const char *arg);
96 const char *arg;
97 } Key;
98
99 typedef struct {
100 const char *symbol;
101 void (*arrange)(void);
102 } Layout;
103
104 typedef struct {
105 const char *prop;
106 const char *tags;
107 Bool isfloating;
108 } Rule;
109
110 typedef struct {
111 regex_t *propregex;
112 regex_t *tagregex;
113 } Regs;
114
115 /* forward declarations */
116 void applyrules(Client *c);
117 void arrange(void);
118 void attach(Client *c);
119 void attachstack(Client *c);
120 void ban(Client *c);
121 void buttonpress(XEvent *e);
122 void checkotherwm(void);
123 void cleanup(void);
124 void compileregs(void);
125 void configure(Client *c);
126 void configurenotify(XEvent *e);
127 void configurerequest(XEvent *e);
128 void destroynotify(XEvent *e);
129 void detach(Client *c);
130 void detachstack(Client *c);
131 void drawbar(void);
132 void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
133 void drawtext(const char *text, unsigned long col[ColLast]);
134 void *emallocz(unsigned int size);
135 void enternotify(XEvent *e);
136 void eprint(const char *errstr, ...);
137 void expose(XEvent *e);
138 void floating(void); /* default floating layout */
139 void focus(Client *c);
140 void focusnext(const char *arg);
141 void focusprev(const char *arg);
142 Client *getclient(Window w);
143 unsigned long getcolor(const char *colstr);
144 long getstate(Window w);
145 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
146 void grabbuttons(Client *c, Bool focused);
147 unsigned int idxoftag(const char *tag);
148 void initfont(const char *fontstr);
149 Bool isarrange(void (*func)());
150 Bool isoccupied(unsigned int t);
151 Bool isprotodel(Client *c);
152 Bool isvisible(Client *c);
153 void keypress(XEvent *e);
154 void killclient(const char *arg);
155 void leavenotify(XEvent *e);
156 void manage(Window w, XWindowAttributes *wa);
157 void mappingnotify(XEvent *e);
158 void maprequest(XEvent *e);
159 void movemouse(Client *c);
160 Client *nexttiled(Client *c);
161 void propertynotify(XEvent *e);
162 void quit(const char *arg);
163 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
164 void resizemouse(Client *c);
165 void restack(void);
166 void run(void);
167 void scan(void);
168 void setclientstate(Client *c, long state);
169 void setlayout(const char *arg);
170 void setmwfact(const char *arg);
171 void setup(void);
172 void spawn(const char *arg);
173 void tag(const char *arg);
174 unsigned int textnw(const char *text, unsigned int len);
175 unsigned int textw(const char *text);
176 void tile(void);
177 void togglebar(const char *arg);
178 void togglefloating(const char *arg);
179 void togglemax(const char *arg);
180 void toggletag(const char *arg);
181 void toggleview(const char *arg);
182 void unban(Client *c);
183 void unmanage(Client *c);
184 void unmapnotify(XEvent *e);
185 void updatebarpos(void);
186 void updatesizehints(Client *c);
187 void updatetitle(Client *c);
188 void view(const char *arg);
189 void viewprevtag(const char *arg); /* views previous selected tags */
190 int xerror(Display *dpy, XErrorEvent *ee);
191 int xerrordummy(Display *dsply, XErrorEvent *ee);
192 int xerrorstart(Display *dsply, XErrorEvent *ee);
193 void zoom(const char *arg);
194
195 /* variables */
196 char stext[256];
197 double mwfact;
198 int screen, sx, sy, sw, sh, wax, way, waw, wah;
199 int (*xerrorxlib)(Display *, XErrorEvent *);
200 unsigned int bh, bpos;
201 unsigned int blw = 0;
202 unsigned int ltidx = 0; /* default */
203 unsigned int nlayouts = 0;
204 unsigned int nrules = 0;
205 unsigned int numlockmask = 0;
206 void (*handler[LASTEvent]) (XEvent *) = {
207 [ButtonPress] = buttonpress,
208 [ConfigureRequest] = configurerequest,
209 [ConfigureNotify] = configurenotify,
210 [DestroyNotify] = destroynotify,
211 [EnterNotify] = enternotify,
212 [LeaveNotify] = leavenotify,
213 [Expose] = expose,
214 [KeyPress] = keypress,
215 [MappingNotify] = mappingnotify,
216 [MapRequest] = maprequest,
217 [PropertyNotify] = propertynotify,
218 [UnmapNotify] = unmapnotify
219 };
220 Atom wmatom[WMLast], netatom[NetLast];
221 Bool otherwm, readin;
222 Bool running = True;
223 Bool selscreen = True;
224 Client *clients = NULL;
225 Client *sel = NULL;
226 Client *stack = NULL;
227 Cursor cursor[CurLast];
228 Display *dpy;
229 DC dc = {0};
230 Window barwin, root;
231 Regs *regs = NULL;
232
233 /* configuration, allows nested code to access above variables */
234 #include "config.h"
235
236 /* Statically define the number of tags. */
237 unsigned int ntags = sizeof tags / sizeof tags[0];
238 Bool seltags[sizeof tags / sizeof tags[0]] = {[0] = True};
239 Bool prevtags[sizeof tags / sizeof tags[0]] = {[0] = True};
240
241 /* functions*/
242 void
243 applyrules(Client *c) {
244 static char buf[512];
245 unsigned int i, j;
246 regmatch_t tmp;
247 Bool matched = False;
248 XClassHint ch = { 0 };
249
250 /* rule matching */
251 XGetClassHint(dpy, c->win, &ch);
252 snprintf(buf, sizeof buf, "%s:%s:%s",
253 ch.res_class ? ch.res_class : "",
254 ch.res_name ? ch.res_name : "", c->name);
255 for(i = 0; i < nrules; i++)
256 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
257 c->isfloating = rules[i].isfloating;
258 for(j = 0; regs[i].tagregex && j < ntags; j++) {
259 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
260 matched = True;
261 c->tags[j] = True;
262 }
263 }
264 }
265 if(ch.res_class)
266 XFree(ch.res_class);
267 if(ch.res_name)
268 XFree(ch.res_name);
269 if(!matched)
270 memcpy(c->tags, seltags, sizeof seltags);
271 }
272
273 void
274 arrange(void) {
275 Client *c;
276
277 for(c = clients; c; c = c->next)
278 if(isvisible(c))
279 unban(c);
280 else
281 ban(c);
282 layouts[ltidx].arrange();
283 focus(NULL);
284 restack();
285 }
286
287 void
288 attach(Client *c) {
289 if(clients)
290 clients->prev = c;
291 c->next = clients;
292 clients = c;
293 }
294
295 void
296 attachstack(Client *c) {
297 c->snext = stack;
298 stack = c;
299 }
300
301 void
302 ban(Client *c) {
303 if(c->isbanned)
304 return;
305 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
306 c->isbanned = True;
307 }
308
309 void
310 buttonpress(XEvent *e) {
311 unsigned int i, x;
312 Client *c;
313 XButtonPressedEvent *ev = &e->xbutton;
314
315 if(barwin == ev->window) {
316 x = 0;
317 for(i = 0; i < ntags; i++) {
318 x += textw(tags[i]);
319 if(ev->x < x) {
320 if(ev->button == Button1) {
321 if(ev->state & MODKEY)
322 tag(tags[i]);
323 else
324 view(tags[i]);
325 }
326 else if(ev->button == Button3) {
327 if(ev->state & MODKEY)
328 toggletag(tags[i]);
329 else
330 toggleview(tags[i]);
331 }
332 return;
333 }
334 }
335 if((ev->x < x + blw) && ev->button == Button1)
336 setlayout(NULL);
337 }
338 else if((c = getclient(ev->window))) {
339 focus(c);
340 if(CLEANMASK(ev->state) != MODKEY)
341 return;
342 if(ev->button == Button1) {
343 if(isarrange(floating) || c->isfloating)
344 restack();
345 else
346 togglefloating(NULL);
347 movemouse(c);
348 }
349 else if(ev->button == Button2) {
350 if(ISTILE && !c->isfixed && c->isfloating)
351 togglefloating(NULL);
352 else
353 zoom(NULL);
354 }
355 else if(ev->button == Button3 && !c->isfixed) {
356 if(isarrange(floating) || c->isfloating)
357 restack();
358 else
359 togglefloating(NULL);
360 resizemouse(c);
361 }
362 }
363 }
364
365 void
366 checkotherwm(void) {
367 otherwm = False;
368 XSetErrorHandler(xerrorstart);
369
370 /* this causes an error if some other window manager is running */
371 XSelectInput(dpy, root, SubstructureRedirectMask);
372 XSync(dpy, False);
373 if(otherwm)
374 eprint("dwm: another window manager is already running\n");
375 XSync(dpy, False);
376 XSetErrorHandler(NULL);
377 xerrorxlib = XSetErrorHandler(xerror);
378 XSync(dpy, False);
379 }
380
381 void
382 cleanup(void) {
383 close(STDIN_FILENO);
384 while(stack) {
385 unban(stack);
386 unmanage(stack);
387 }
388 if(dc.font.set)
389 XFreeFontSet(dpy, dc.font.set);
390 else
391 XFreeFont(dpy, dc.font.xfont);
392 XUngrabKey(dpy, AnyKey, AnyModifier, root);
393 XFreePixmap(dpy, dc.drawable);
394 XFreeGC(dpy, dc.gc);
395 XDestroyWindow(dpy, barwin);
396 XFreeCursor(dpy, cursor[CurNormal]);
397 XFreeCursor(dpy, cursor[CurResize]);
398 XFreeCursor(dpy, cursor[CurMove]);
399 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
400 XSync(dpy, False);
401 }
402
403 void
404 compileregs(void) {
405 unsigned int i;
406 regex_t *reg;
407
408 if(regs)
409 return;
410 nrules = sizeof rules / sizeof rules[0];
411 regs = emallocz(nrules * sizeof(Regs));
412 for(i = 0; i < nrules; i++) {
413 if(rules[i].prop) {
414 reg = emallocz(sizeof(regex_t));
415 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
416 free(reg);
417 else
418 regs[i].propregex = reg;
419 }
420 if(rules[i].tags) {
421 reg = emallocz(sizeof(regex_t));
422 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
423 free(reg);
424 else
425 regs[i].tagregex = reg;
426 }
427 }
428 }
429
430 void
431 configure(Client *c) {
432 XConfigureEvent ce;
433
434 ce.type = ConfigureNotify;
435 ce.display = dpy;
436 ce.event = c->win;
437 ce.window = c->win;
438 ce.x = c->x;
439 ce.y = c->y;
440 ce.width = c->w;
441 ce.height = c->h;
442 ce.border_width = c->border;
443 ce.above = None;
444 ce.override_redirect = False;
445 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
446 }
447
448 void
449 configurenotify(XEvent *e) {
450 XConfigureEvent *ev = &e->xconfigure;
451
452 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
453 sw = ev->width;
454 sh = ev->height;
455 XFreePixmap(dpy, dc.drawable);
456 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
457 XResizeWindow(dpy, barwin, sw, bh);
458 updatebarpos();
459 arrange();
460 }
461 }
462
463 void
464 configurerequest(XEvent *e) {
465 Client *c;
466 XConfigureRequestEvent *ev = &e->xconfigurerequest;
467 XWindowChanges wc;
468
469 if((c = getclient(ev->window))) {
470 c->ismax = False;
471 if(ev->value_mask & CWBorderWidth)
472 c->border = ev->border_width;
473 if(c->isfixed || c->isfloating || isarrange(floating)) {
474 if(ev->value_mask & CWX)
475 c->x = ev->x;
476 if(ev->value_mask & CWY)
477 c->y = ev->y;
478 if(ev->value_mask & CWWidth)
479 c->w = ev->width;
480 if(ev->value_mask & CWHeight)
481 c->h = ev->height;
482 if((c->x + c->w) > sw && c->isfloating)
483 c->x = sw / 2 - c->w / 2; /* center in x direction */
484 if((c->y + c->h) > sh && c->isfloating)
485 c->y = sh / 2 - c->h / 2; /* center in y direction */
486 if((ev->value_mask & (CWX | CWY))
487 && !(ev->value_mask & (CWWidth | CWHeight)))
488 configure(c);
489 if(isvisible(c))
490 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
491 }
492 else
493 configure(c);
494 }
495 else {
496 wc.x = ev->x;
497 wc.y = ev->y;
498 wc.width = ev->width;
499 wc.height = ev->height;
500 wc.border_width = ev->border_width;
501 wc.sibling = ev->above;
502 wc.stack_mode = ev->detail;
503 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
504 }
505 XSync(dpy, False);
506 }
507
508 void
509 destroynotify(XEvent *e) {
510 Client *c;
511 XDestroyWindowEvent *ev = &e->xdestroywindow;
512
513 if((c = getclient(ev->window)))
514 unmanage(c);
515 }
516
517 void
518 detach(Client *c) {
519 if(c->prev)
520 c->prev->next = c->next;
521 if(c->next)
522 c->next->prev = c->prev;
523 if(c == clients)
524 clients = c->next;
525 c->next = c->prev = NULL;
526 }
527
528 void
529 detachstack(Client *c) {
530 Client **tc;
531
532 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
533 *tc = c->snext;
534 }
535
536 void
537 drawbar(void) {
538 int i, x;
539
540 dc.x = dc.y = 0;
541 for(i = 0; i < ntags; i++) {
542 dc.w = textw(tags[i]);
543 if(seltags[i]) {
544 drawtext(tags[i], dc.sel);
545 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
546 }
547 else {
548 drawtext(tags[i], dc.norm);
549 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
550 }
551 dc.x += dc.w;
552 }
553 dc.w = blw;
554 drawtext(layouts[ltidx].symbol, dc.norm);
555 x = dc.x + dc.w;
556 dc.w = textw(stext);
557 dc.x = sw - dc.w;
558 if(dc.x < x) {
559 dc.x = x;
560 dc.w = sw - x;
561 }
562 drawtext(stext, dc.norm);
563 if((dc.w = dc.x - x) > bh) {
564 dc.x = x;
565 if(sel) {
566 drawtext(sel->name, dc.sel);
567 drawsquare(sel->ismax, sel->isfloating, dc.sel);
568 }
569 else
570 drawtext(NULL, dc.norm);
571 }
572 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
573 XSync(dpy, False);
574 }
575
576 void
577 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
578 int x;
579 XGCValues gcv;
580 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
581
582 gcv.foreground = col[ColFG];
583 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
584 x = (dc.font.ascent + dc.font.descent + 2) / 4;
585 r.x = dc.x + 1;
586 r.y = dc.y + 1;
587 if(filled) {
588 r.width = r.height = x + 1;
589 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
590 }
591 else if(empty) {
592 r.width = r.height = x;
593 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
594 }
595 }
596
597 void
598 drawtext(const char *text, unsigned long col[ColLast]) {
599 int x, y, w, h;
600 static char buf[256];
601 unsigned int len, olen;
602 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
603
604 XSetForeground(dpy, dc.gc, col[ColBG]);
605 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
606 if(!text)
607 return;
608 w = 0;
609 olen = len = strlen(text);
610 if(len >= sizeof buf)
611 len = sizeof buf - 1;
612 memcpy(buf, text, len);
613 buf[len] = 0;
614 h = dc.font.ascent + dc.font.descent;
615 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
616 x = dc.x + (h / 2);
617 /* shorten text if necessary */
618 while(len && (w = textnw(buf, len)) > dc.w - h)
619 buf[--len] = 0;
620 if(len < olen) {
621 if(len > 1)
622 buf[len - 1] = '.';
623 if(len > 2)
624 buf[len - 2] = '.';
625 if(len > 3)
626 buf[len - 3] = '.';
627 }
628 if(w > dc.w)
629 return; /* too long */
630 XSetForeground(dpy, dc.gc, col[ColFG]);
631 if(dc.font.set)
632 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
633 else
634 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
635 }
636
637 void *
638 emallocz(unsigned int size) {
639 void *res = calloc(1, size);
640
641 if(!res)
642 eprint("fatal: could not malloc() %u bytes\n", size);
643 return res;
644 }
645
646 void
647 enternotify(XEvent *e) {
648 Client *c;
649 XCrossingEvent *ev = &e->xcrossing;
650
651 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
652 return;
653 if((c = getclient(ev->window)))
654 focus(c);
655 else if(ev->window == root) {
656 selscreen = True;
657 focus(NULL);
658 }
659 }
660
661 void
662 eprint(const char *errstr, ...) {
663 va_list ap;
664
665 va_start(ap, errstr);
666 vfprintf(stderr, errstr, ap);
667 va_end(ap);
668 exit(EXIT_FAILURE);
669 }
670
671 void
672 expose(XEvent *e) {
673 XExposeEvent *ev = &e->xexpose;
674
675 if(ev->count == 0) {
676 if(barwin == ev->window)
677 drawbar();
678 }
679 }
680
681 void
682 floating(void) { /* default floating layout */
683 Client *c;
684
685 for(c = clients; c; c = c->next)
686 if(isvisible(c))
687 resize(c, c->x, c->y, c->w, c->h, True);
688 }
689
690 void
691 focus(Client *c) {
692 if((!c && selscreen) || (c && !isvisible(c)))
693 for(c = stack; c && !isvisible(c); c = c->snext);
694 if(sel && sel != c) {
695 grabbuttons(sel, False);
696 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
697 }
698 if(c) {
699 detachstack(c);
700 attachstack(c);
701 grabbuttons(c, True);
702 }
703 sel = c;
704 drawbar();
705 if(!selscreen)
706 return;
707 if(c) {
708 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
709 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
710 }
711 else
712 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
713 }
714
715 void
716 focusnext(const char *arg) {
717 Client *c;
718
719 if(!sel)
720 return;
721 for(c = sel->next; c && !isvisible(c); c = c->next);
722 if(!c)
723 for(c = clients; c && !isvisible(c); c = c->next);
724 if(c) {
725 focus(c);
726 restack();
727 }
728 }
729
730 void
731 focusprev(const char *arg) {
732 Client *c;
733
734 if(!sel)
735 return;
736 for(c = sel->prev; c && !isvisible(c); c = c->prev);
737 if(!c) {
738 for(c = clients; c && c->next; c = c->next);
739 for(; c && !isvisible(c); c = c->prev);
740 }
741 if(c) {
742 focus(c);
743 restack();
744 }
745 }
746
747 Client *
748 getclient(Window w) {
749 Client *c;
750
751 for(c = clients; c && c->win != w; c = c->next);
752 return c;
753 }
754
755 unsigned long
756 getcolor(const char *colstr) {
757 Colormap cmap = DefaultColormap(dpy, screen);
758 XColor color;
759
760 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
761 eprint("error, cannot allocate color '%s'\n", colstr);
762 return color.pixel;
763 }
764
765 long
766 getstate(Window w) {
767 int format, status;
768 long result = -1;
769 unsigned char *p = NULL;
770 unsigned long n, extra;
771 Atom real;
772
773 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
774 &real, &format, &n, &extra, (unsigned char **)&p);
775 if(status != Success)
776 return -1;
777 if(n != 0)
778 result = *p;
779 XFree(p);
780 return result;
781 }
782
783 Bool
784 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
785 char **list = NULL;
786 int n;
787 XTextProperty name;
788
789 if(!text || size == 0)
790 return False;
791 text[0] = '\0';
792 XGetTextProperty(dpy, w, &name, atom);
793 if(!name.nitems)
794 return False;
795 if(name.encoding == XA_STRING)
796 strncpy(text, (char *)name.value, size - 1);
797 else {
798 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
799 && n > 0 && *list)
800 {
801 strncpy(text, *list, size - 1);
802 XFreeStringList(list);
803 }
804 }
805 text[size - 1] = '\0';
806 XFree(name.value);
807 return True;
808 }
809
810 void
811 grabbuttons(Client *c, Bool focused) {
812 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
813
814 if(focused) {
815 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
816 GrabModeAsync, GrabModeSync, None, None);
817 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
818 GrabModeAsync, GrabModeSync, None, None);
819 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
820 GrabModeAsync, GrabModeSync, None, None);
821 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
822 GrabModeAsync, GrabModeSync, None, None);
823
824 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
825 GrabModeAsync, GrabModeSync, None, None);
826 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
827 GrabModeAsync, GrabModeSync, None, None);
828 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
829 GrabModeAsync, GrabModeSync, None, None);
830 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
831 GrabModeAsync, GrabModeSync, None, None);
832
833 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
834 GrabModeAsync, GrabModeSync, None, None);
835 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
836 GrabModeAsync, GrabModeSync, None, None);
837 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
838 GrabModeAsync, GrabModeSync, None, None);
839 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
840 GrabModeAsync, GrabModeSync, None, None);
841 }
842 else
843 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
844 GrabModeAsync, GrabModeSync, None, None);
845 }
846
847 unsigned int
848 idxoftag(const char *tag) {
849 unsigned int i;
850
851 for(i = 0; i < ntags; i++)
852 if(tags[i] == tag)
853 return i;
854 return 0;
855 }
856
857 void
858 initfont(const char *fontstr) {
859 char *def, **missing;
860 int i, n;
861
862 missing = NULL;
863 if(dc.font.set)
864 XFreeFontSet(dpy, dc.font.set);
865 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
866 if(missing) {
867 while(n--)
868 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
869 XFreeStringList(missing);
870 }
871 if(dc.font.set) {
872 XFontSetExtents *font_extents;
873 XFontStruct **xfonts;
874 char **font_names;
875 dc.font.ascent = dc.font.descent = 0;
876 font_extents = XExtentsOfFontSet(dc.font.set);
877 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
878 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
879 if(dc.font.ascent < (*xfonts)->ascent)
880 dc.font.ascent = (*xfonts)->ascent;
881 if(dc.font.descent < (*xfonts)->descent)
882 dc.font.descent = (*xfonts)->descent;
883 xfonts++;
884 }
885 }
886 else {
887 if(dc.font.xfont)
888 XFreeFont(dpy, dc.font.xfont);
889 dc.font.xfont = NULL;
890 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
891 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
892 eprint("error, cannot load font: '%s'\n", fontstr);
893 dc.font.ascent = dc.font.xfont->ascent;
894 dc.font.descent = dc.font.xfont->descent;
895 }
896 dc.font.height = dc.font.ascent + dc.font.descent;
897 }
898
899 Bool
900 isarrange(void (*func)())
901 {
902 return func == layouts[ltidx].arrange;
903 }
904
905 Bool
906 isoccupied(unsigned int t) {
907 Client *c;
908
909 for(c = clients; c; c = c->next)
910 if(c->tags[t])
911 return True;
912 return False;
913 }
914
915 Bool
916 isprotodel(Client *c) {
917 int i, n;
918 Atom *protocols;
919 Bool ret = False;
920
921 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
922 for(i = 0; !ret && i < n; i++)
923 if(protocols[i] == wmatom[WMDelete])
924 ret = True;
925 XFree(protocols);
926 }
927 return ret;
928 }
929
930 Bool
931 isvisible(Client *c) {
932 unsigned int i;
933
934 for(i = 0; i < ntags; i++)
935 if(c->tags[i] && seltags[i])
936 return True;
937 return False;
938 }
939
940 void
941 keypress(XEvent *e) {
942 KEYS
943 unsigned int len = sizeof keys / sizeof keys[0];
944 unsigned int i;
945 KeyCode code;
946 KeySym keysym;
947 XKeyEvent *ev;
948
949 if(!e) { /* grabkeys */
950 XUngrabKey(dpy, AnyKey, AnyModifier, root);
951 for(i = 0; i < len; i++) {
952 code = XKeysymToKeycode(dpy, keys[i].keysym);
953 XGrabKey(dpy, code, keys[i].mod, root, True,
954 GrabModeAsync, GrabModeAsync);
955 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
956 GrabModeAsync, GrabModeAsync);
957 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
958 GrabModeAsync, GrabModeAsync);
959 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
960 GrabModeAsync, GrabModeAsync);
961 }
962 return;
963 }
964 ev = &e->xkey;
965 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
966 for(i = 0; i < len; i++)
967 if(keysym == keys[i].keysym
968 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
969 {
970 if(keys[i].func)
971 keys[i].func(keys[i].arg);
972 }
973 }
974
975 void
976 killclient(const char *arg) {
977 XEvent ev;
978
979 if(!sel)
980 return;
981 if(isprotodel(sel)) {
982 ev.type = ClientMessage;
983 ev.xclient.window = sel->win;
984 ev.xclient.message_type = wmatom[WMProtocols];
985 ev.xclient.format = 32;
986 ev.xclient.data.l[0] = wmatom[WMDelete];
987 ev.xclient.data.l[1] = CurrentTime;
988 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
989 }
990 else
991 XKillClient(dpy, sel->win);
992 }
993
994 void
995 leavenotify(XEvent *e) {
996 XCrossingEvent *ev = &e->xcrossing;
997
998 if((ev->window == root) && !ev->same_screen) {
999 selscreen = False;
1000 focus(NULL);
1001 }
1002 }
1003
1004 void
1005 manage(Window w, XWindowAttributes *wa) {
1006 Client *c, *t = NULL;
1007 Window trans;
1008 Status rettrans;
1009 XWindowChanges wc;
1010
1011 c = emallocz(sizeof(Client));
1012 c->tags = emallocz(sizeof seltags);
1013 c->win = w;
1014 c->x = wa->x;
1015 c->y = wa->y;
1016 c->w = wa->width;
1017 c->h = wa->height;
1018 c->oldborder = wa->border_width;
1019 if(c->w == sw && c->h == sh) {
1020 c->x = sx;
1021 c->y = sy;
1022 c->border = wa->border_width;
1023 }
1024 else {
1025 if(c->x + c->w + 2 * c->border > wax + waw)
1026 c->x = wax + waw - c->w - 2 * c->border;
1027 if(c->y + c->h + 2 * c->border > way + wah)
1028 c->y = way + wah - c->h - 2 * c->border;
1029 if(c->x < wax)
1030 c->x = wax;
1031 if(c->y < way)
1032 c->y = way;
1033 c->border = BORDERPX;
1034 }
1035 wc.border_width = c->border;
1036 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1037 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1038 configure(c); /* propagates border_width, if size doesn't change */
1039 updatesizehints(c);
1040 XSelectInput(dpy, w,
1041 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
1042 grabbuttons(c, False);
1043 updatetitle(c);
1044 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1045 for(t = clients; t && t->win != trans; t = t->next);
1046 if(t)
1047 memcpy(c->tags, t->tags, sizeof seltags);
1048 applyrules(c);
1049 if(!c->isfloating)
1050 c->isfloating = (rettrans == Success) || c->isfixed;
1051 attach(c);
1052 attachstack(c);
1053 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1054 ban(c);
1055 XMapWindow(dpy, c->win);
1056 setclientstate(c, NormalState);
1057 arrange();
1058 }
1059
1060 void
1061 mappingnotify(XEvent *e) {
1062 XMappingEvent *ev = &e->xmapping;
1063
1064 XRefreshKeyboardMapping(ev);
1065 if(ev->request == MappingKeyboard)
1066 keypress(NULL);
1067 }
1068
1069 void
1070 maprequest(XEvent *e) {
1071 static XWindowAttributes wa;
1072 XMapRequestEvent *ev = &e->xmaprequest;
1073
1074 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1075 return;
1076 if(wa.override_redirect)
1077 return;
1078 if(!getclient(ev->window))
1079 manage(ev->window, &wa);
1080 }
1081
1082 void
1083 movemouse(Client *c) {
1084 int x1, y1, ocx, ocy, di, nx, ny;
1085 unsigned int dui;
1086 Window dummy;
1087 XEvent ev;
1088
1089 ocx = nx = c->x;
1090 ocy = ny = c->y;
1091 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1092 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1093 return;
1094 c->ismax = False;
1095 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1096 for(;;) {
1097 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1098 switch (ev.type) {
1099 case ButtonRelease:
1100 XUngrabPointer(dpy, CurrentTime);
1101 return;
1102 case ConfigureRequest:
1103 case Expose:
1104 case MapRequest:
1105 handler[ev.type](&ev);
1106 break;
1107 case MotionNotify:
1108 XSync(dpy, False);
1109 nx = ocx + (ev.xmotion.x - x1);
1110 ny = ocy + (ev.xmotion.y - y1);
1111 if(abs(wax + nx) < SNAP)
1112 nx = wax;
1113 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1114 nx = wax + waw - c->w - 2 * c->border;
1115 if(abs(way - ny) < SNAP)
1116 ny = way;
1117 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1118 ny = way + wah - c->h - 2 * c->border;
1119 resize(c, nx, ny, c->w, c->h, False);
1120 break;
1121 }
1122 }
1123 }
1124
1125 Client *
1126 nexttiled(Client *c) {
1127 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1128 return c;
1129 }
1130
1131 void
1132 propertynotify(XEvent *e) {
1133 Client *c;
1134 Window trans;
1135 XPropertyEvent *ev = &e->xproperty;
1136
1137 if(ev->state == PropertyDelete)
1138 return; /* ignore */
1139 if((c = getclient(ev->window))) {
1140 switch (ev->atom) {
1141 default: break;
1142 case XA_WM_TRANSIENT_FOR:
1143 XGetTransientForHint(dpy, c->win, &trans);
1144 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1145 arrange();
1146 break;
1147 case XA_WM_NORMAL_HINTS:
1148 updatesizehints(c);
1149 break;
1150 }
1151 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1152 updatetitle(c);
1153 if(c == sel)
1154 drawbar();
1155 }
1156 }
1157 }
1158
1159 void
1160 quit(const char *arg) {
1161 readin = running = False;
1162 }
1163
1164 void
1165 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1166 double dx, dy, max, min, ratio;
1167 XWindowChanges wc;
1168
1169 if(sizehints) {
1170 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
1171 dx = (double)(w - c->basew);
1172 dy = (double)(h - c->baseh);
1173 min = (double)(c->minax) / (double)(c->minay);
1174 max = (double)(c->maxax) / (double)(c->maxay);
1175 ratio = dx / dy;
1176 if(max > 0 && min > 0 && ratio > 0) {
1177 if(ratio < min) {
1178 dy = (dx * min + dy) / (min * min + 1);
1179 dx = dy * min;
1180 w = (int)dx + c->basew;
1181 h = (int)dy + c->baseh;
1182 }
1183 else if(ratio > max) {
1184 dy = (dx * min + dy) / (max * max + 1);
1185 dx = dy * min;
1186 w = (int)dx + c->basew;
1187 h = (int)dy + c->baseh;
1188 }
1189 }
1190 }
1191 if(c->minw && w < c->minw)
1192 w = c->minw;
1193 if(c->minh && h < c->minh)
1194 h = c->minh;
1195 if(c->maxw && w > c->maxw)
1196 w = c->maxw;
1197 if(c->maxh && h > c->maxh)
1198 h = c->maxh;
1199 if(c->incw)
1200 w -= (w - c->basew) % c->incw;
1201 if(c->inch)
1202 h -= (h - c->baseh) % c->inch;
1203 }
1204 if(w <= 0 || h <= 0)
1205 return;
1206 /* offscreen appearance fixes */
1207 if(x > sw)
1208 x = sw - w - 2 * c->border;
1209 if(y > sh)
1210 y = sh - h - 2 * c->border;
1211 if(x + w + 2 * c->border < sx)
1212 x = sx;
1213 if(y + h + 2 * c->border < sy)
1214 y = sy;
1215 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1216 c->x = wc.x = x;
1217 c->y = wc.y = y;
1218 c->w = wc.width = w;
1219 c->h = wc.height = h;
1220 wc.border_width = c->border;
1221 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1222 configure(c);
1223 XSync(dpy, False);
1224 }
1225 }
1226
1227 void
1228 resizemouse(Client *c) {
1229 int ocx, ocy;
1230 int nw, nh;
1231 XEvent ev;
1232
1233 ocx = c->x;
1234 ocy = c->y;
1235 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1236 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1237 return;
1238 c->ismax = False;
1239 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1240 for(;;) {
1241 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1242 switch(ev.type) {
1243 case ButtonRelease:
1244 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1245 c->w + c->border - 1, c->h + c->border - 1);
1246 XUngrabPointer(dpy, CurrentTime);
1247 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1248 return;
1249 case ConfigureRequest:
1250 case Expose:
1251 case MapRequest:
1252 handler[ev.type](&ev);
1253 break;
1254 case MotionNotify:
1255 XSync(dpy, False);
1256 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1257 nw = 1;
1258 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1259 nh = 1;
1260 resize(c, c->x, c->y, nw, nh, True);
1261 break;
1262 }
1263 }
1264 }
1265
1266 void
1267 restack(void) {
1268 Client *c;
1269 XEvent ev;
1270 XWindowChanges wc;
1271
1272 drawbar();
1273 if(!sel)
1274 return;
1275 if(sel->isfloating || isarrange(floating))
1276 XRaiseWindow(dpy, sel->win);
1277 if(!isarrange(floating)) {
1278 wc.stack_mode = Below;
1279 wc.sibling = barwin;
1280 if(!sel->isfloating) {
1281 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1282 wc.sibling = sel->win;
1283 }
1284 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1285 if(c == sel)
1286 continue;
1287 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1288 wc.sibling = c->win;
1289 }
1290 }
1291 XSync(dpy, False);
1292 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1293 }
1294
1295 void
1296 run(void) {
1297 char *p;
1298 int r, xfd;
1299 fd_set rd;
1300 XEvent ev;
1301
1302 /* main event loop, also reads status text from stdin */
1303 XSync(dpy, False);
1304 xfd = ConnectionNumber(dpy);
1305 readin = True;
1306 while(running) {
1307 FD_ZERO(&rd);
1308 if(readin)
1309 FD_SET(STDIN_FILENO, &rd);
1310 FD_SET(xfd, &rd);
1311 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1312 if(errno == EINTR)
1313 continue;
1314 eprint("select failed\n");
1315 }
1316 if(FD_ISSET(STDIN_FILENO, &rd)) {
1317 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1318 case -1:
1319 strncpy(stext, strerror(errno), sizeof stext - 1);
1320 stext[sizeof stext - 1] = '\0';
1321 readin = False;
1322 break;
1323 case 0:
1324 strncpy(stext, "EOF", 4);
1325 readin = False;
1326 break;
1327 default:
1328 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1329 for(; p >= stext && *p != '\n'; --p);
1330 if(p > stext)
1331 strncpy(stext, p + 1, sizeof stext);
1332 }
1333 drawbar();
1334 }
1335 while(XPending(dpy)) {
1336 XNextEvent(dpy, &ev);
1337 if(handler[ev.type])
1338 (handler[ev.type])(&ev); /* call handler */
1339 }
1340 }
1341 }
1342
1343 void
1344 scan(void) {
1345 unsigned int i, num;
1346 Window *wins, d1, d2;
1347 XWindowAttributes wa;
1348
1349 wins = NULL;
1350 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1351 for(i = 0; i < num; i++) {
1352 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1353 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1354 continue;
1355 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1356 manage(wins[i], &wa);
1357 }
1358 for(i = 0; i < num; i++) { /* now the transients */
1359 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1360 continue;
1361 if(XGetTransientForHint(dpy, wins[i], &d1)
1362 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1363 manage(wins[i], &wa);
1364 }
1365 }
1366 if(wins)
1367 XFree(wins);
1368 }
1369
1370 void
1371 setclientstate(Client *c, long state) {
1372 long data[] = {state, None};
1373
1374 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1375 PropModeReplace, (unsigned char *)data, 2);
1376 }
1377
1378 void
1379 setlayout(const char *arg) {
1380 unsigned int i;
1381
1382 if(!arg) {
1383 if(++ltidx == nlayouts)
1384 ltidx = 0;;
1385 }
1386 else {
1387 for(i = 0; i < nlayouts; i++)
1388 if(!strcmp(arg, layouts[i].symbol))
1389 break;
1390 if(i == nlayouts)
1391 return;
1392 ltidx = i;
1393 }
1394 if(sel)
1395 arrange();
1396 else
1397 drawbar();
1398 }
1399
1400 void
1401 setmwfact(const char *arg) {
1402 double delta;
1403
1404 if(!ISTILE)
1405 return;
1406 /* arg handling, manipulate mwfact */
1407 if(arg == NULL)
1408 mwfact = MWFACT;
1409 else if(1 == sscanf(arg, "%lf", &delta)) {
1410 if(arg[0] == '+' || arg[0] == '-')
1411 mwfact += delta;
1412 else
1413 mwfact = delta;
1414 if(mwfact < 0.1)
1415 mwfact = 0.1;
1416 else if(mwfact > 0.9)
1417 mwfact = 0.9;
1418 }
1419 arrange();
1420 }
1421
1422 void
1423 setup(void) {
1424 int d;
1425 unsigned int i, j, mask;
1426 Window w;
1427 XModifierKeymap *modmap;
1428 XSetWindowAttributes wa;
1429
1430 /* init atoms */
1431 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1432 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1433 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1434 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1435 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1436 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1437 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1438 PropModeReplace, (unsigned char *) netatom, NetLast);
1439
1440 /* init cursors */
1441 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1442 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1443 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1444
1445 /* init geometry */
1446 sx = sy = 0;
1447 sw = DisplayWidth(dpy, screen);
1448 sh = DisplayHeight(dpy, screen);
1449
1450 /* init modifier map */
1451 modmap = XGetModifierMapping(dpy);
1452 for(i = 0; i < 8; i++)
1453 for(j = 0; j < modmap->max_keypermod; j++) {
1454 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1455 == XKeysymToKeycode(dpy, XK_Num_Lock))
1456 numlockmask = (1 << i);
1457 }
1458 XFreeModifiermap(modmap);
1459
1460 /* select for events */
1461 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1462 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1463 wa.cursor = cursor[CurNormal];
1464 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1465 XSelectInput(dpy, root, wa.event_mask);
1466
1467 /* grab keys */
1468 keypress(NULL);
1469
1470 /* init tags */
1471 compileregs();
1472
1473 /* init appearance */
1474 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1475 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1476 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1477 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1478 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1479 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1480 initfont(FONT);
1481 dc.h = bh = dc.font.height + 2;
1482
1483 /* init layouts */
1484 mwfact = MWFACT;
1485 nlayouts = sizeof layouts / sizeof layouts[0];
1486 for(blw = i = 0; i < nlayouts; i++) {
1487 j = textw(layouts[i].symbol);
1488 if(j > blw)
1489 blw = j;
1490 }
1491
1492 /* init bar */
1493 bpos = BARPOS;
1494 wa.override_redirect = 1;
1495 wa.background_pixmap = ParentRelative;
1496 wa.event_mask = ButtonPressMask | ExposureMask;
1497 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1498 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1499 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1500 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1501 updatebarpos();
1502 XMapRaised(dpy, barwin);
1503 strcpy(stext, "dwm-"VERSION);
1504 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1505 dc.gc = XCreateGC(dpy, root, 0, 0);
1506 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1507 if(!dc.font.set)
1508 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1509
1510 /* multihead support */
1511 selscreen = XQueryPointer(dpy, root, &w, &w, &d, &d, &d, &d, &mask);
1512 }
1513
1514 void
1515 spawn(const char *arg) {
1516 static char *shell = NULL;
1517
1518 if(!shell && !(shell = getenv("SHELL")))
1519 shell = "/bin/sh";
1520 if(!arg)
1521 return;
1522 /* The double-fork construct avoids zombie processes and keeps the code
1523 * clean from stupid signal handlers. */
1524 if(fork() == 0) {
1525 if(fork() == 0) {
1526 if(dpy)
1527 close(ConnectionNumber(dpy));
1528 setsid();
1529 execl(shell, shell, "-c", arg, (char *)NULL);
1530 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1531 perror(" failed");
1532 }
1533 exit(0);
1534 }
1535 wait(0);
1536 }
1537
1538 void
1539 tag(const char *arg) {
1540 unsigned int i;
1541
1542 if(!sel)
1543 return;
1544 for(i = 0; i < ntags; i++)
1545 sel->tags[i] = arg == NULL;
1546 i = idxoftag(arg);
1547 if(i >= 0 && i < ntags)
1548 sel->tags[i] = True;
1549 arrange();
1550 }
1551
1552 unsigned int
1553 textnw(const char *text, unsigned int len) {
1554 XRectangle r;
1555
1556 if(dc.font.set) {
1557 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1558 return r.width;
1559 }
1560 return XTextWidth(dc.font.xfont, text, len);
1561 }
1562
1563 unsigned int
1564 textw(const char *text) {
1565 return textnw(text, strlen(text)) + dc.font.height;
1566 }
1567
1568 void
1569 tile(void) {
1570 unsigned int i, n, nx, ny, nw, nh, mw, th;
1571 Client *c, *mc;
1572
1573 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1574 n++;
1575
1576 /* window geoms */
1577 mw = (n == 1) ? waw : mwfact * waw;
1578 th = (n > 1) ? wah / (n - 1) : 0;
1579 if(n > 1 && th < bh)
1580 th = wah;
1581
1582 nx = wax;
1583 ny = way;
1584 nw = 0; /* gcc stupidity requires this */
1585 for(i = 0, c = mc = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1586 c->ismax = False;
1587 if(i == 0) { /* master */
1588 nw = mw - 2 * c->border;
1589 nh = wah - 2 * c->border;
1590 }
1591 else { /* tile window */
1592 if(i == 1) {
1593 ny = way;
1594 nx += mc->w + 2 * mc->border;
1595 nw = waw - nx - 2 * c->border;
1596 }
1597 if(i + 1 == n) /* remainder */
1598 nh = (way + wah) - ny - 2 * c->border;
1599 else
1600 nh = th - 2 * c->border;
1601 }
1602 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1603 if(n > 1 && th != wah)
1604 ny = c->y + c->h + 2 * c->border;
1605 }
1606 }
1607
1608 void
1609 togglebar(const char *arg) {
1610 if(bpos == BarOff)
1611 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1612 else
1613 bpos = BarOff;
1614 updatebarpos();
1615 arrange();
1616 }
1617
1618 void
1619 togglefloating(const char *arg) {
1620 if(!sel)
1621 return;
1622 sel->isfloating = !sel->isfloating;
1623 if(sel->isfloating)
1624 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1625 arrange();
1626 }
1627
1628 void
1629 togglemax(const char *arg) {
1630 XEvent ev;
1631
1632 if(!sel || sel->isfixed)
1633 return;
1634 if((sel->ismax = !sel->ismax)) {
1635 if(isarrange(floating) || sel->isfloating)
1636 sel->wasfloating = True;
1637 else {
1638 togglefloating(NULL);
1639 sel->wasfloating = False;
1640 }
1641 sel->rx = sel->x;
1642 sel->ry = sel->y;
1643 sel->rw = sel->w;
1644 sel->rh = sel->h;
1645 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1646 }
1647 else {
1648 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1649 if(!sel->wasfloating)
1650 togglefloating(NULL);
1651 }
1652 drawbar();
1653 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1654 }
1655
1656 void
1657 toggletag(const char *arg) {
1658 unsigned int i, j;
1659
1660 if(!sel)
1661 return;
1662 i = idxoftag(arg);
1663 sel->tags[i] = !sel->tags[i];
1664 for(j = 0; j < ntags && !sel->tags[j]; j++);
1665 if(j == ntags)
1666 sel->tags[i] = True;
1667 arrange();
1668 }
1669
1670 void
1671 toggleview(const char *arg) {
1672 unsigned int i, j;
1673
1674 i = idxoftag(arg);
1675 seltags[i] = !seltags[i];
1676 for(j = 0; j < ntags && !seltags[j]; j++);
1677 if(j == ntags)
1678 seltags[i] = True; /* at least one tag must be viewed */
1679 arrange();
1680 }
1681
1682 void
1683 unban(Client *c) {
1684 if(!c->isbanned)
1685 return;
1686 XMoveWindow(dpy, c->win, c->x, c->y);
1687 c->isbanned = False;
1688 }
1689
1690 void
1691 unmanage(Client *c) {
1692 XWindowChanges wc;
1693
1694 wc.border_width = c->oldborder;
1695 /* The server grab construct avoids race conditions. */
1696 XGrabServer(dpy);
1697 XSetErrorHandler(xerrordummy);
1698 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1699 detach(c);
1700 detachstack(c);
1701 if(sel == c)
1702 focus(NULL);
1703 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1704 setclientstate(c, WithdrawnState);
1705 free(c->tags);
1706 free(c);
1707 XSync(dpy, False);
1708 XSetErrorHandler(xerror);
1709 XUngrabServer(dpy);
1710 arrange();
1711 }
1712
1713 void
1714 unmapnotify(XEvent *e) {
1715 Client *c;
1716 XUnmapEvent *ev = &e->xunmap;
1717
1718 if((c = getclient(ev->window)))
1719 unmanage(c);
1720 }
1721
1722 void
1723 updatebarpos(void) {
1724 XEvent ev;
1725
1726 wax = sx;
1727 way = sy;
1728 wah = sh;
1729 waw = sw;
1730 switch(bpos) {
1731 default:
1732 wah -= bh;
1733 way += bh;
1734 XMoveWindow(dpy, barwin, sx, sy);
1735 break;
1736 case BarBot:
1737 wah -= bh;
1738 XMoveWindow(dpy, barwin, sx, sy + wah);
1739 break;
1740 case BarOff:
1741 XMoveWindow(dpy, barwin, sx, sy - bh);
1742 break;
1743 }
1744 XSync(dpy, False);
1745 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1746 }
1747
1748 void
1749 updatesizehints(Client *c) {
1750 long msize;
1751 XSizeHints size;
1752
1753 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1754 size.flags = PSize;
1755 c->flags = size.flags;
1756 if(c->flags & PBaseSize) {
1757 c->basew = size.base_width;
1758 c->baseh = size.base_height;
1759 }
1760 else if(c->flags & PMinSize) {
1761 c->basew = size.min_width;
1762 c->baseh = size.min_height;
1763 }
1764 else
1765 c->basew = c->baseh = 0;
1766 if(c->flags & PResizeInc) {
1767 c->incw = size.width_inc;
1768 c->inch = size.height_inc;
1769 }
1770 else
1771 c->incw = c->inch = 0;
1772 if(c->flags & PMaxSize) {
1773 c->maxw = size.max_width;
1774 c->maxh = size.max_height;
1775 }
1776 else
1777 c->maxw = c->maxh = 0;
1778 if(c->flags & PMinSize) {
1779 c->minw = size.min_width;
1780 c->minh = size.min_height;
1781 }
1782 else if(c->flags & PBaseSize) {
1783 c->minw = size.base_width;
1784 c->minh = size.base_height;
1785 }
1786 else
1787 c->minw = c->minh = 0;
1788 if(c->flags & PAspect) {
1789 c->minax = size.min_aspect.x;
1790 c->maxax = size.max_aspect.x;
1791 c->minay = size.min_aspect.y;
1792 c->maxay = size.max_aspect.y;
1793 }
1794 else
1795 c->minax = c->maxax = c->minay = c->maxay = 0;
1796 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1797 && c->maxw == c->minw && c->maxh == c->minh);
1798 }
1799
1800 void
1801 updatetitle(Client *c) {
1802 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1803 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1804 }
1805
1806 /* There's no way to check accesses to destroyed windows, thus those cases are
1807 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1808 * default error handler, which may call exit. */
1809 int
1810 xerror(Display *dpy, XErrorEvent *ee) {
1811 if(ee->error_code == BadWindow
1812 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1813 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1814 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1815 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1816 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1817 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1818 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1819 return 0;
1820 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1821 ee->request_code, ee->error_code);
1822 return xerrorxlib(dpy, ee); /* may call exit */
1823 }
1824
1825 int
1826 xerrordummy(Display *dsply, XErrorEvent *ee) {
1827 return 0;
1828 }
1829
1830 /* Startup Error handler to check if another window manager
1831 * is already running. */
1832 int
1833 xerrorstart(Display *dsply, XErrorEvent *ee) {
1834 otherwm = True;
1835 return -1;
1836 }
1837
1838 void
1839 view(const char *arg) {
1840 unsigned int i;
1841
1842 memcpy(prevtags, seltags, sizeof seltags);
1843 for(i = 0; i < ntags; i++)
1844 seltags[i] = arg == NULL;
1845 i = idxoftag(arg);
1846 if(i >= 0 && i < ntags)
1847 seltags[i] = True;
1848 arrange();
1849 }
1850
1851 void
1852 viewprevtag(const char *arg) {
1853 static Bool tmptags[sizeof tags / sizeof tags[0]];
1854
1855 memcpy(tmptags, seltags, sizeof seltags);
1856 memcpy(seltags, prevtags, sizeof seltags);
1857 memcpy(prevtags, tmptags, sizeof seltags);
1858 arrange();
1859 }
1860
1861 void
1862 zoom(const char *arg) {
1863 Client *c;
1864
1865 if(!sel || !ISTILE || sel->isfloating)
1866 return;
1867 if((c = sel) == nexttiled(clients))
1868 if(!(c = nexttiled(c->next)))
1869 return;
1870 detach(c);
1871 attach(c);
1872 focus(c);
1873 arrange();
1874 }
1875
1876 int
1877 main(int argc, char *argv[]) {
1878 if(argc == 2 && !strcmp("-v", argv[1]))
1879 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1880 else if(argc != 1)
1881 eprint("usage: dwm [-v]\n");
1882
1883 setlocale(LC_CTYPE, "");
1884 if(!(dpy = XOpenDisplay(0)))
1885 eprint("dwm: cannot open display\n");
1886 screen = DefaultScreen(dpy);
1887 root = RootWindow(dpy, screen);
1888
1889 checkotherwm();
1890 setup();
1891 drawbar();
1892 scan();
1893 run();
1894 cleanup();
1895
1896 XCloseDisplay(dpy);
1897 return 0;
1898 }