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[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains an array of Bools of the same size as the
20 * global tags array to indicate the tags of a client.
21 *
22 * Keys and tagging rules are organized as arrays and defined in config.h.
23 *
24 * To understand everything else, start reading main().
25 */
26 #include <errno.h>
27 #include <locale.h>
28 #include <stdarg.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33 #include <sys/select.h>
34 #include <sys/types.h>
35 #include <sys/wait.h>
36 #include <regex.h>
37 #include <X11/cursorfont.h>
38 #include <X11/keysym.h>
39 #include <X11/Xatom.h>
40 #include <X11/Xlib.h>
41 #include <X11/Xproto.h>
42 #include <X11/Xutil.h>
43 //#ifdef XINERAMA
44 #include <X11/extensions/Xinerama.h>
45 //#endif
46
47 /* macros */
48 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
49 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
50 #define LENGTH(x) (sizeof x / sizeof x[0])
51 #define MAXTAGLEN 16
52 #define MOUSEMASK (BUTTONMASK | PointerMotionMask)
53
54
55 /* enums */
56 enum { BarTop, BarBot, BarOff }; /* bar position */
57 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
58 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
59 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
60 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
61
62 /* typedefs */
63 typedef struct Monitor Monitor;
64 typedef struct Client Client;
65 struct Client {
66 char name[256];
67 int x, y, w, h;
68 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
69 int minax, maxax, minay, maxay;
70 long flags;
71 unsigned int border, oldborder;
72 Bool isbanned, isfixed, isfloating, isurgent;
73 Bool *tags;
74 Client *next;
75 Client *prev;
76 Client *snext;
77 Window win;
78 Monitor *monitor;
79 };
80
81 typedef struct {
82 int x, y, w, h;
83 unsigned long norm[ColLast];
84 unsigned long sel[ColLast];
85 Drawable drawable;
86 GC gc;
87 struct {
88 int ascent;
89 int descent;
90 int height;
91 XFontSet set;
92 XFontStruct *xfont;
93 } font;
94 } DC; /* draw context */
95
96 typedef struct {
97 unsigned long mod;
98 KeySym keysym;
99 void (*func)(const char *arg);
100 const char *arg;
101 } Key;
102
103 typedef struct {
104 const char *symbol;
105 void (*arrange)(Monitor *);
106 } Layout;
107
108 typedef struct {
109 const char *prop;
110 const char *tags;
111 Bool isfloating;
112 int monitor;
113 } Rule;
114
115 typedef struct {
116 regex_t *propregex;
117 regex_t *tagregex;
118 } Regs;
119
120 struct Monitor {
121 unsigned int id;
122 int sx, sy, sw, sh, wax, way, wah, waw;
123 double mwfact;
124 Bool *seltags;
125 Bool *prevtags;
126 Layout *layout;
127 Window barwin;
128 };
129
130
131 /* function declarations */
132 void applyrules(Client *c);
133 void arrange(void);
134 void attach(Client *c);
135 void attachstack(Client *c);
136 void ban(Client *c);
137 void buttonpress(XEvent *e);
138 void checkotherwm(void);
139 void cleanup(void);
140 void compileregs(void);
141 void configure(Client *c);
142 void configurenotify(XEvent *e);
143 void configurerequest(XEvent *e);
144 void destroynotify(XEvent *e);
145 void detach(Client *c);
146 void detachstack(Client *c);
147 void drawbar(Monitor *m);
148 void drawsquare(Monitor *m, Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
149 void drawtext(Monitor *m, const char *text, unsigned long col[ColLast], Bool invert);
150 void *emallocz(unsigned int size);
151 void enternotify(XEvent *e);
152 void eprint(const char *errstr, ...);
153 void expose(XEvent *e);
154 void floating(Monitor *m); /* default floating layout */
155 void focus(Client *c);
156 void focusin(XEvent *e);
157 void focusnext(const char *arg);
158 void focusprev(const char *arg);
159 Client *getclient(Window w);
160 unsigned long getcolor(const char *colstr);
161 Monitor *getmonitor(Window barwin);
162 long getstate(Window w);
163 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
164 void grabbuttons(Client *c, Bool focused);
165 void grabkeys(void);
166 unsigned int idxoftag(const char *tag);
167 void initfont(const char *fontstr);
168 Bool isoccupied(Monitor *monitor, unsigned int t);
169 Bool isprotodel(Client *c);
170 Bool isurgent(Monitor *monitor, unsigned int t);
171 Bool isvisible(Client *c, Monitor *m);
172 void keypress(XEvent *e);
173 void killclient(const char *arg);
174 void manage(Window w, XWindowAttributes *wa);
175 void mappingnotify(XEvent *e);
176 void maprequest(XEvent *e);
177 Monitor *monitorat(void);
178 void movemouse(Client *c);
179 Client *nexttiled(Client *c, Monitor *monitor);
180 void propertynotify(XEvent *e);
181 void quit(const char *arg);
182 void reapply(const char *arg);
183 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
184 void resizemouse(Client *c);
185 void restack(Monitor *m);
186 void run(void);
187 void scan(void);
188 void setclientstate(Client *c, long state);
189 void setlayout(const char *arg);
190 void setmwfact(const char *arg);
191 void setup(void);
192 void spawn(const char *arg);
193 void tag(const char *arg);
194 unsigned int textnw(const char *text, unsigned int len);
195 unsigned int textw(const char *text);
196 void tile(Monitor *m);
197 void togglebar(const char *arg);
198 void togglefloating(const char *arg);
199 void toggletag(const char *arg);
200 void toggleview(const char *arg);
201 void unban(Client *c);
202 void unmanage(Client *c);
203 void unmapnotify(XEvent *e);
204 void updatebarpos(Monitor *m);
205 void updatesizehints(Client *c);
206 void updatetitle(Client *c);
207 void updatewmhints(Client *c);
208 void view(const char *arg);
209 void viewprevtag(const char *arg); /* views previous selected tags */
210 int xerror(Display *dpy, XErrorEvent *ee);
211 int xerrordummy(Display *dsply, XErrorEvent *ee);
212 int xerrorstart(Display *dsply, XErrorEvent *ee);
213 void zoom(const char *arg);
214 void movetomonitor(const char *arg);
215 void selectmonitor(const char *arg);
216
217 /* variables */
218 char stext[256];
219 int mcount = 1;
220 Monitor *selmonitor;
221 int screen;
222 int (*xerrorxlib)(Display *, XErrorEvent *);
223 unsigned int bh, bpos;
224 unsigned int blw = 0;
225 unsigned int numlockmask = 0;
226 void (*handler[LASTEvent]) (XEvent *) = {
227 [ButtonPress] = buttonpress,
228 [ConfigureRequest] = configurerequest,
229 [ConfigureNotify] = configurenotify,
230 [DestroyNotify] = destroynotify,
231 [EnterNotify] = enternotify,
232 [Expose] = expose,
233 [FocusIn] = focusin,
234 [KeyPress] = keypress,
235 [MappingNotify] = mappingnotify,
236 [MapRequest] = maprequest,
237 [PropertyNotify] = propertynotify,
238 [UnmapNotify] = unmapnotify
239 };
240 Atom wmatom[WMLast], netatom[NetLast];
241 Bool isxinerama = False;
242 Bool domwfact = True;
243 Bool dozoom = True;
244 Bool otherwm, readin;
245 Bool running = True;
246 Client *clients = NULL;
247 Client *sel = NULL;
248 Client *stack = NULL;
249 Cursor cursor[CurLast];
250 Display *dpy;
251 DC dc = {0};
252 Regs *regs = NULL;
253 Monitor *monitors;
254 Window root;
255
256 /* configuration, allows nested code to access above variables */
257 #include "config.h"
258
259 //Bool prevtags[LENGTH(tags)];
260
261 /* function implementations */
262 void
263 applyrules(Client *c) {
264 static char buf[512];
265 unsigned int i, j;
266 regmatch_t tmp;
267 Bool matched_tag = False;
268 Bool matched_monitor = False;
269 XClassHint ch = { 0 };
270
271 /* rule matching */
272 XGetClassHint(dpy, c->win, &ch);
273 snprintf(buf, sizeof buf, "%s:%s:%s",
274 ch.res_class ? ch.res_class : "",
275 ch.res_name ? ch.res_name : "", c->name);
276 for(i = 0; i < LENGTH(rules); i++)
277 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
278 if (rules[i].monitor >= 0 && rules[i].monitor < mcount) {
279 matched_monitor = True;
280 c->monitor = &monitors[rules[i].monitor];
281 }
282
283 c->isfloating = rules[i].isfloating;
284 for(j = 0; regs[i].tagregex && j < LENGTH(tags); j++) {
285 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
286 matched_tag = True;
287 c->tags[j] = True;
288 }
289 }
290 }
291 if(ch.res_class)
292 XFree(ch.res_class);
293 if(ch.res_name)
294 XFree(ch.res_name);
295 if(!matched_tag)
296 memcpy(c->tags, monitorat()->seltags, sizeof initags);
297 if (!matched_monitor)
298 c->monitor = monitorat();
299 }
300
301 void
302 arrange(void) {
303 Client *c;
304
305 for(c = clients; c; c = c->next)
306 if(isvisible(c, c->monitor))
307 unban(c);
308 else
309 ban(c);
310
311 selmonitor->layout->arrange(selmonitor);
312 focus(NULL);
313 restack(selmonitor);
314 }
315
316 void
317 attach(Client *c) {
318 if(clients)
319 clients->prev = c;
320 c->next = clients;
321 clients = c;
322 }
323
324 void
325 attachstack(Client *c) {
326 c->snext = stack;
327 stack = c;
328 }
329
330 void
331 ban(Client *c) {
332 if(c->isbanned)
333 return;
334 XMoveWindow(dpy, c->win, c->x + 3 * c->monitor->sw, c->y);
335 c->isbanned = True;
336 }
337
338 void
339 buttonpress(XEvent *e) {
340 unsigned int i, x;
341 Client *c;
342 XButtonPressedEvent *ev = &e->xbutton;
343
344 Monitor *m = monitorat();
345
346 if(ev->window == m->barwin) {
347 x = 0;
348 for(i = 0; i < LENGTH(tags); i++) {
349 x += textw(tags[i]);
350 if(ev->x < x) {
351 if(ev->button == Button1) {
352 if(ev->state & MODKEY)
353 tag(tags[i]);
354 else
355 view(tags[i]);
356 }
357 else if(ev->button == Button3) {
358 if(ev->state & MODKEY)
359 toggletag(tags[i]);
360 else
361 toggleview(tags[i]);
362 }
363 return;
364 }
365 }
366 if((ev->x < x + blw) && ev->button == Button1)
367 setlayout(NULL);
368 }
369 else if((c = getclient(ev->window))) {
370 focus(c);
371 if(CLEANMASK(ev->state) != MODKEY)
372 return;
373 if(ev->button == Button1) {
374 restack(c->monitor);
375 movemouse(c);
376 }
377 else if(ev->button == Button2) {
378 if((floating != m->layout->arrange) && c->isfloating)
379 togglefloating(NULL);
380 else
381 zoom(NULL);
382 }
383 else if(ev->button == Button3 && !c->isfixed) {
384 restack(c->monitor);
385 resizemouse(c);
386 }
387 }
388 }
389
390 void
391 checkotherwm(void) {
392 otherwm = False;
393 XSetErrorHandler(xerrorstart);
394
395 /* this causes an error if some other window manager is running */
396 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
397 XSync(dpy, False);
398 if(otherwm)
399 eprint("dwm: another window manager is already running\n");
400 XSync(dpy, False);
401 XSetErrorHandler(NULL);
402 xerrorxlib = XSetErrorHandler(xerror);
403 XSync(dpy, False);
404 }
405
406 void
407 cleanup(void) {
408 unsigned int i;
409 close(STDIN_FILENO);
410 while(stack) {
411 unban(stack);
412 unmanage(stack);
413 }
414 if(dc.font.set)
415 XFreeFontSet(dpy, dc.font.set);
416 else
417 XFreeFont(dpy, dc.font.xfont);
418
419 XUngrabKey(dpy, AnyKey, AnyModifier, root);
420 XFreePixmap(dpy, dc.drawable);
421 XFreeGC(dpy, dc.gc);
422 XFreeCursor(dpy, cursor[CurNormal]);
423 XFreeCursor(dpy, cursor[CurResize]);
424 XFreeCursor(dpy, cursor[CurMove]);
425 for(i = 0; i < mcount; i++)
426 XDestroyWindow(dpy, monitors[i].barwin);
427 XSync(dpy, False);
428 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
429 }
430
431 void
432 compileregs(void) {
433 unsigned int i;
434 regex_t *reg;
435
436 if(regs)
437 return;
438 regs = emallocz(LENGTH(rules) * sizeof(Regs));
439 for(i = 0; i < LENGTH(rules); i++) {
440 if(rules[i].prop) {
441 reg = emallocz(sizeof(regex_t));
442 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
443 free(reg);
444 else
445 regs[i].propregex = reg;
446 }
447 if(rules[i].tags) {
448 reg = emallocz(sizeof(regex_t));
449 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
450 free(reg);
451 else
452 regs[i].tagregex = reg;
453 }
454 }
455 }
456
457 void
458 configure(Client *c) {
459 XConfigureEvent ce;
460
461 ce.type = ConfigureNotify;
462 ce.display = dpy;
463 ce.event = c->win;
464 ce.window = c->win;
465 ce.x = c->x;
466 ce.y = c->y;
467 ce.width = c->w;
468 ce.height = c->h;
469 ce.border_width = c->border;
470 ce.above = None;
471 ce.override_redirect = False;
472 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
473 }
474
475 void
476 configurenotify(XEvent *e) {
477 XConfigureEvent *ev = &e->xconfigure;
478 Monitor *m = selmonitor;
479
480 if(ev->window == root && (ev->width != m->sw || ev->height != m->sh)) {
481 /* TODO -- update Xinerama dimensions here */
482 m->sw = ev->width;
483 m->sh = ev->height;
484 XFreePixmap(dpy, dc.drawable);
485 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(root, screen), bh, DefaultDepth(dpy, screen));
486 XResizeWindow(dpy, m->barwin, m->sw, bh);
487 updatebarpos(m);
488 arrange();
489 }
490 }
491
492 void
493 configurerequest(XEvent *e) {
494 Client *c;
495 XConfigureRequestEvent *ev = &e->xconfigurerequest;
496 XWindowChanges wc;
497
498 if((c = getclient(ev->window))) {
499 Monitor *m = c->monitor;
500 if(ev->value_mask & CWBorderWidth)
501 c->border = ev->border_width;
502 if(c->isfixed || c->isfloating || (floating == m->layout->arrange)) {
503 if(ev->value_mask & CWX)
504 c->x = m->sx+ev->x;
505 if(ev->value_mask & CWY)
506 c->y = m->sy+ev->y;
507 if(ev->value_mask & CWWidth)
508 c->w = ev->width;
509 if(ev->value_mask & CWHeight)
510 c->h = ev->height;
511 if((c->x - m->sx + c->w) > m->sw && c->isfloating)
512 c->x = m->sx + (m->sw / 2 - c->w / 2); /* center in x direction */
513 if((c->y - m->sy + c->h) > m->sh && c->isfloating)
514 c->y = m->sy + (m->sh / 2 - c->h / 2); /* center in y direction */
515 if((ev->value_mask & (CWX | CWY))
516 && !(ev->value_mask & (CWWidth | CWHeight)))
517 configure(c);
518 if(isvisible(c, monitorat()))
519 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
520 }
521 else
522 configure(c);
523 }
524 else {
525 wc.x = ev->x;
526 wc.y = ev->y;
527 wc.width = ev->width;
528 wc.height = ev->height;
529 wc.border_width = ev->border_width;
530 wc.sibling = ev->above;
531 wc.stack_mode = ev->detail;
532 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
533 }
534 XSync(dpy, False);
535 }
536
537 void
538 destroynotify(XEvent *e) {
539 Client *c;
540 XDestroyWindowEvent *ev = &e->xdestroywindow;
541
542 if((c = getclient(ev->window)))
543 unmanage(c);
544 }
545
546 void
547 detach(Client *c) {
548 if(c->prev)
549 c->prev->next = c->next;
550 if(c->next)
551 c->next->prev = c->prev;
552 if(c == clients)
553 clients = c->next;
554 c->next = c->prev = NULL;
555 }
556
557 void
558 detachstack(Client *c) {
559 Client **tc;
560
561 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
562 *tc = c->snext;
563 }
564
565 void
566 drawbar(Monitor *m) {
567 int j, x;
568 Client *c;
569
570 dc.x = 0;
571 for(c = stack; c && !isvisible(c, m); c = c->snext);
572 for(j = 0; j < LENGTH(tags); j++) {
573 dc.w = textw(tags[j]);
574 if(m->seltags[j]) {
575 drawtext(m, tags[j], dc.sel, isurgent(m, j));
576 drawsquare(m, c && c->tags[j] && c->monitor == m,
577 isoccupied(m, j), isurgent(m, j), dc.sel);
578 }
579 else {
580 drawtext(m, tags[j], dc.norm, isurgent(m, j));
581 drawsquare(m, c && c->tags[j] && c->monitor == m,
582 isoccupied(m, j), isurgent(m, j), dc.norm);
583 }
584 dc.x += dc.w;
585 }
586 dc.w = blw;
587 drawtext(m, m->layout->symbol, dc.norm, False);
588 x = dc.x + dc.w;
589 if(m == selmonitor) {
590 dc.w = textw(stext);
591 dc.x = m->sw - dc.w;
592 if(dc.x < x) {
593 dc.x = x;
594 dc.w = m->sw - x;
595 }
596 drawtext(m, stext, dc.norm, False);
597 }
598 else
599 dc.x = m->sw;
600 if((dc.w = dc.x - x) > bh) {
601 dc.x = x;
602 if(c) {
603 drawtext(m, c->name, dc.sel, False);
604 drawsquare(m, False, c->isfloating, False, dc.sel);
605 }
606 else
607 drawtext(m, NULL, dc.norm, False);
608 }
609 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->sw, bh, 0, 0);
610 XSync(dpy, False);
611 }
612
613 void
614 drawsquare(Monitor *m, Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
615 int x;
616 XGCValues gcv;
617 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
618
619 gcv.foreground = col[invert ? ColBG : ColFG];
620 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
621 x = (dc.font.ascent + dc.font.descent + 2) / 4;
622 r.x = dc.x + 1;
623 r.y = dc.y + 1;
624 if(filled) {
625 r.width = r.height = x + 1;
626 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
627 }
628 else if(empty) {
629 r.width = r.height = x;
630 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
631 }
632 }
633
634 void
635 drawtext(Monitor *m, const char *text, unsigned long col[ColLast], Bool invert) {
636 int x, y, w, h;
637 static char buf[256];
638 unsigned int len, olen;
639 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
640
641 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
642 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
643 if(!text)
644 return;
645 w = 0;
646 olen = len = strlen(text);
647 if(len >= sizeof buf)
648 len = sizeof buf - 1;
649 memcpy(buf, text, len);
650 buf[len] = 0;
651 h = dc.font.ascent + dc.font.descent;
652 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
653 x = dc.x + (h / 2);
654 /* shorten text if necessary */
655 while(len && (w = textnw(buf, len)) > dc.w - h)
656 buf[--len] = 0;
657 if(len < olen) {
658 if(len > 1)
659 buf[len - 1] = '.';
660 if(len > 2)
661 buf[len - 2] = '.';
662 if(len > 3)
663 buf[len - 3] = '.';
664 }
665 if(w > dc.w)
666 return; /* too long */
667 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
668 if(dc.font.set)
669 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
670 else
671 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
672 }
673
674 void *
675 emallocz(unsigned int size) {
676 void *res = calloc(1, size);
677
678 if(!res)
679 eprint("fatal: could not malloc() %u bytes\n", size);
680 return res;
681 }
682
683 void
684 enternotify(XEvent *e) {
685 Client *c;
686 XCrossingEvent *ev = &e->xcrossing;
687
688 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior) {
689 if(!isxinerama || ev->window != root)
690 return;
691 }
692 if((c = getclient(ev->window)))
693 focus(c);
694 else {
695 selmonitor = monitorat();
696 fprintf(stderr, "updating selmonitor %d\n", selmonitor - monitors);
697 focus(NULL);
698 }
699 }
700
701 void
702 eprint(const char *errstr, ...) {
703 va_list ap;
704
705 va_start(ap, errstr);
706 vfprintf(stderr, errstr, ap);
707 va_end(ap);
708 exit(EXIT_FAILURE);
709 }
710
711 void
712 expose(XEvent *e) {
713 Monitor *m;
714 XExposeEvent *ev = &e->xexpose;
715
716 if(ev->count == 0 && (m = getmonitor(ev->window)))
717 drawbar(m);
718 }
719
720 void
721 floating(Monitor *m) { /* default floating layout */
722 Client *c;
723
724 domwfact = dozoom = False;
725 for(c = clients; c; c = c->next)
726 if(isvisible(c, m))
727 resize(c, c->x, c->y, c->w, c->h, True);
728 }
729
730 void
731 focus(Client *c) {
732 if(c)
733 selmonitor = c->monitor;
734 if(!c || (c && !isvisible(c, selmonitor)))
735 for(c = stack; c && !isvisible(c, c->monitor); c = c->snext);
736 if(sel && sel != c) {
737 grabbuttons(sel, False);
738 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
739 }
740 if(c) {
741 detachstack(c);
742 attachstack(c);
743 grabbuttons(c, True);
744 }
745 sel = c;
746 if(c) {
747 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
748 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
749 selmonitor = c->monitor;
750 }
751 else
752 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
753 drawbar(selmonitor);
754 }
755
756 void
757 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
758 XFocusChangeEvent *ev = &e->xfocus;
759
760 if(sel && ev->window != sel->win)
761 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
762 }
763
764 void
765 focusnext(const char *arg) {
766 Client *c;
767
768 if(!sel)
769 return;
770 for(c = sel->next; c && !isvisible(c, selmonitor); c = c->next);
771 if(!c)
772 for(c = clients; c && !isvisible(c, selmonitor); c = c->next);
773 if(c) {
774 focus(c);
775 restack(c->monitor);
776 }
777 }
778
779 void
780 focusprev(const char *arg) {
781 Client *c;
782
783 if(!sel)
784 return;
785 for(c = sel->prev; c && !isvisible(c, selmonitor); c = c->prev);
786 if(!c) {
787 for(c = clients; c && c->next; c = c->next);
788 for(; c && !isvisible(c, selmonitor); c = c->prev);
789 }
790 if(c) {
791 focus(c);
792 restack(c->monitor);
793 }
794 }
795
796 Client *
797 getclient(Window w) {
798 Client *c;
799
800 for(c = clients; c && c->win != w; c = c->next);
801 return c;
802 }
803
804 unsigned long
805 getcolor(const char *colstr) {
806 Colormap cmap = DefaultColormap(dpy, screen);
807 XColor color;
808
809 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
810 eprint("error, cannot allocate color '%s'\n", colstr);
811 return color.pixel;
812 }
813
814 Monitor *
815 getmonitor(Window barwin) {
816 unsigned int i;
817
818 for(i = 0; i < mcount; i++)
819 if(monitors[i].barwin == barwin)
820 return &monitors[i];
821 return NULL;
822 }
823
824 long
825 getstate(Window w) {
826 int format, status;
827 long result = -1;
828 unsigned char *p = NULL;
829 unsigned long n, extra;
830 Atom real;
831
832 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
833 &real, &format, &n, &extra, (unsigned char **)&p);
834 if(status != Success)
835 return -1;
836 if(n != 0)
837 result = *p;
838 XFree(p);
839 return result;
840 }
841
842 Bool
843 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
844 char **list = NULL;
845 int n;
846 XTextProperty name;
847
848 if(!text || size == 0)
849 return False;
850 text[0] = '\0';
851 XGetTextProperty(dpy, w, &name, atom);
852 if(!name.nitems)
853 return False;
854 if(name.encoding == XA_STRING)
855 strncpy(text, (char *)name.value, size - 1);
856 else {
857 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
858 && n > 0 && *list) {
859 strncpy(text, *list, size - 1);
860 XFreeStringList(list);
861 }
862 }
863 text[size - 1] = '\0';
864 XFree(name.value);
865 return True;
866 }
867
868 void
869 grabbuttons(Client *c, Bool focused) {
870 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
871
872 if(focused) {
873 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
874 GrabModeAsync, GrabModeSync, None, None);
875 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
876 GrabModeAsync, GrabModeSync, None, None);
877 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
878 GrabModeAsync, GrabModeSync, None, None);
879 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
880 GrabModeAsync, GrabModeSync, None, None);
881
882 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
883 GrabModeAsync, GrabModeSync, None, None);
884 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
885 GrabModeAsync, GrabModeSync, None, None);
886 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
887 GrabModeAsync, GrabModeSync, None, None);
888 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
889 GrabModeAsync, GrabModeSync, None, None);
890
891 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
892 GrabModeAsync, GrabModeSync, None, None);
893 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
894 GrabModeAsync, GrabModeSync, None, None);
895 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
896 GrabModeAsync, GrabModeSync, None, None);
897 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
898 GrabModeAsync, GrabModeSync, None, None);
899 }
900 else
901 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
902 GrabModeAsync, GrabModeSync, None, None);
903 }
904
905 void
906 grabkeys(void) {
907 unsigned int i, j;
908 KeyCode code;
909 XModifierKeymap *modmap;
910
911 /* init modifier map */
912 modmap = XGetModifierMapping(dpy);
913 for(i = 0; i < 8; i++)
914 for(j = 0; j < modmap->max_keypermod; j++) {
915 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
916 numlockmask = (1 << i);
917 }
918 XFreeModifiermap(modmap);
919
920 XUngrabKey(dpy, AnyKey, AnyModifier, root);
921 for(i = 0; i < LENGTH(keys); i++) {
922 code = XKeysymToKeycode(dpy, keys[i].keysym);
923 XGrabKey(dpy, code, keys[i].mod, root, True,
924 GrabModeAsync, GrabModeAsync);
925 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
926 GrabModeAsync, GrabModeAsync);
927 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
928 GrabModeAsync, GrabModeAsync);
929 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
930 GrabModeAsync, GrabModeAsync);
931 }
932 }
933
934 unsigned int
935 idxoftag(const char *tag) {
936 unsigned int i;
937
938 for(i = 0; (i < LENGTH(tags)) && (tags[i] != tag); i++);
939 return (i < LENGTH(tags)) ? i : 0;
940 }
941
942 void
943 initfont(const char *fontstr) {
944 char *def, **missing;
945 int i, n;
946
947 missing = NULL;
948 if(dc.font.set)
949 XFreeFontSet(dpy, dc.font.set);
950 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
951 if(missing) {
952 while(n--)
953 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
954 XFreeStringList(missing);
955 }
956 if(dc.font.set) {
957 XFontSetExtents *font_extents;
958 XFontStruct **xfonts;
959 char **font_names;
960 dc.font.ascent = dc.font.descent = 0;
961 font_extents = XExtentsOfFontSet(dc.font.set);
962 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
963 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
964 if(dc.font.ascent < (*xfonts)->ascent)
965 dc.font.ascent = (*xfonts)->ascent;
966 if(dc.font.descent < (*xfonts)->descent)
967 dc.font.descent = (*xfonts)->descent;
968 xfonts++;
969 }
970 }
971 else {
972 if(dc.font.xfont)
973 XFreeFont(dpy, dc.font.xfont);
974 dc.font.xfont = NULL;
975 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
976 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
977 eprint("error, cannot load font: '%s'\n", fontstr);
978 dc.font.ascent = dc.font.xfont->ascent;
979 dc.font.descent = dc.font.xfont->descent;
980 }
981 dc.font.height = dc.font.ascent + dc.font.descent;
982 }
983
984 Bool
985 isoccupied(Monitor *monitor, unsigned int t) {
986 Client *c;
987
988 for(c = clients; c; c = c->next)
989 if(c->tags[t] && c->monitor == monitor)
990 return True;
991 return False;
992 }
993
994 Bool
995 isprotodel(Client *c) {
996 int i, n;
997 Atom *protocols;
998 Bool ret = False;
999
1000 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1001 for(i = 0; !ret && i < n; i++)
1002 if(protocols[i] == wmatom[WMDelete])
1003 ret = True;
1004 XFree(protocols);
1005 }
1006 return ret;
1007 }
1008
1009 Bool
1010 isurgent(Monitor *monitor, unsigned int t) {
1011 Client *c;
1012
1013 for(c = clients; c; c = c->next)
1014 if(c->monitor == monitor && c->isurgent && c->tags[t])
1015 return True;
1016 return False;
1017 }
1018
1019 Bool
1020 isvisible(Client *c, Monitor *m) {
1021 unsigned int i;
1022
1023 if(c->monitor != m)
1024 return False;
1025 for(i = 0; i < LENGTH(tags); i++)
1026 if(c->tags[i] && c->monitor->seltags[i])
1027 return True;
1028 return False;
1029 }
1030
1031 void
1032 keypress(XEvent *e) {
1033 unsigned int i;
1034 KeySym keysym;
1035 XKeyEvent *ev;
1036
1037 ev = &e->xkey;
1038 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1039 for(i = 0; i < LENGTH(keys); i++)
1040 if(keysym == keys[i].keysym
1041 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1042 {
1043 if(keys[i].func)
1044 keys[i].func(keys[i].arg);
1045 }
1046 }
1047
1048 void
1049 killclient(const char *arg) {
1050 XEvent ev;
1051
1052 if(!sel)
1053 return;
1054 if(isprotodel(sel)) {
1055 ev.type = ClientMessage;
1056 ev.xclient.window = sel->win;
1057 ev.xclient.message_type = wmatom[WMProtocols];
1058 ev.xclient.format = 32;
1059 ev.xclient.data.l[0] = wmatom[WMDelete];
1060 ev.xclient.data.l[1] = CurrentTime;
1061 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1062 }
1063 else
1064 XKillClient(dpy, sel->win);
1065 }
1066
1067 void
1068 manage(Window w, XWindowAttributes *wa) {
1069 Client *c, *t = NULL;
1070 Monitor *m;
1071 Status rettrans;
1072 Window trans;
1073 XWindowChanges wc;
1074
1075 c = emallocz(sizeof(Client));
1076 c->tags = emallocz(sizeof initags);
1077 c->win = w;
1078
1079 applyrules(c);
1080
1081 m = selmonitor;
1082
1083 c->x = wa->x + m->sx;
1084 c->y = wa->y + m->sy;
1085 c->w = wa->width;
1086 c->h = wa->height;
1087 c->oldborder = wa->border_width;
1088
1089 if(c->w == m->sw && c->h == m->sh) {
1090 c->x = m->sx;
1091 c->y = m->sy;
1092 c->border = wa->border_width;
1093 }
1094 else {
1095 if(c->x + c->w + 2 * c->border > m->wax + m->waw)
1096 c->x = m->wax + m->waw - c->w - 2 * c->border;
1097 if(c->y + c->h + 2 * c->border > m->way + m->wah)
1098 c->y = m->way + m->wah - c->h - 2 * c->border;
1099 if(c->x < m->wax)
1100 c->x = m->wax;
1101 if(c->y < m->way)
1102 c->y = m->way;
1103 c->border = BORDERPX;
1104 }
1105 wc.border_width = c->border;
1106 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1107 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1108 configure(c); /* propagates border_width, if size doesn't change */
1109 updatesizehints(c);
1110 XSelectInput(dpy, w, EnterWindowMask | FocusChangeMask | PropertyChangeMask | StructureNotifyMask);
1111 grabbuttons(c, False);
1112 updatetitle(c);
1113 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1114 for(t = clients; t && t->win != trans; t = t->next);
1115 if(t)
1116 memcpy(c->tags, t->tags, sizeof initags);
1117 if(!c->isfloating)
1118 c->isfloating = (rettrans == Success) || c->isfixed;
1119 attach(c);
1120 attachstack(c);
1121 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1122 ban(c);
1123 XMapWindow(dpy, c->win);
1124 setclientstate(c, NormalState);
1125 arrange();
1126 }
1127
1128 void
1129 mappingnotify(XEvent *e) {
1130 XMappingEvent *ev = &e->xmapping;
1131
1132 XRefreshKeyboardMapping(ev);
1133 if(ev->request == MappingKeyboard)
1134 grabkeys();
1135 }
1136
1137 void
1138 maprequest(XEvent *e) {
1139 static XWindowAttributes wa;
1140 XMapRequestEvent *ev = &e->xmaprequest;
1141
1142 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1143 return;
1144 if(wa.override_redirect)
1145 return;
1146 if(!getclient(ev->window))
1147 manage(ev->window, &wa);
1148 }
1149
1150 Monitor *
1151 monitorat() {
1152 int i, x, y;
1153 Window win;
1154 unsigned int mask;
1155
1156 XQueryPointer(dpy, root, &win, &win, &x, &y, &i, &i, &mask);
1157 for(i = 0; i < mcount; i++) {
1158 if((x >= monitors[i].sx && x < monitors[i].sx + monitors[i].sw)
1159 && (y >= monitors[i].sy && y < monitors[i].sy + monitors[i].sh)) {
1160 return &monitors[i];
1161 }
1162 }
1163 return NULL;
1164 }
1165
1166 void
1167 movemouse(Client *c) {
1168 int x1, y1, ocx, ocy, di, nx, ny;
1169 unsigned int dui;
1170 Monitor *m;
1171 Window dummy;
1172 XEvent ev;
1173
1174 ocx = nx = c->x;
1175 ocy = ny = c->y;
1176 m = c->monitor;
1177 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1178 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1179 return;
1180 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1181 for(;;) {
1182 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1183 switch (ev.type) {
1184 case ButtonRelease:
1185 XUngrabPointer(dpy, CurrentTime);
1186 return;
1187 case ConfigureRequest:
1188 case Expose:
1189 case MapRequest:
1190 handler[ev.type](&ev);
1191 break;
1192 case MotionNotify:
1193 XSync(dpy, False);
1194 nx = ocx + (ev.xmotion.x - x1);
1195 ny = ocy + (ev.xmotion.y - y1);
1196 if(abs(m->wax - nx) < SNAP)
1197 nx = m->wax;
1198 else if(abs((m->wax + m->waw) - (nx + c->w + 2 * c->border)) < SNAP)
1199 nx = m->wax + m->waw - c->w - 2 * c->border;
1200 if(abs(m->way - ny) < SNAP)
1201 ny = m->way;
1202 else if(abs((m->way + m->wah) - (ny + c->h + 2 * c->border)) < SNAP)
1203 ny = m->way + m->wah - c->h - 2 * c->border;
1204 if((m->layout->arrange != floating) && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1205 togglefloating(NULL);
1206 if((m->layout->arrange == floating) || c->isfloating)
1207 resize(c, nx, ny, c->w, c->h, False);
1208 break;
1209 }
1210 }
1211 }
1212
1213 Client *
1214 nexttiled(Client *c, Monitor *monitor) {
1215 for(; c && (c->isfloating || !isvisible(c, monitor)); c = c->next);
1216 return c;
1217 }
1218
1219 void
1220 propertynotify(XEvent *e) {
1221 Client *c;
1222 Window trans;
1223 XPropertyEvent *ev = &e->xproperty;
1224
1225 if(ev->state == PropertyDelete)
1226 return; /* ignore */
1227 if((c = getclient(ev->window))) {
1228 switch (ev->atom) {
1229 default: break;
1230 case XA_WM_TRANSIENT_FOR:
1231 XGetTransientForHint(dpy, c->win, &trans);
1232 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1233 arrange();
1234 break;
1235 case XA_WM_NORMAL_HINTS:
1236 updatesizehints(c);
1237 break;
1238 case XA_WM_HINTS:
1239 updatewmhints(c);
1240 drawbar(c->monitor);
1241 break;
1242 }
1243 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1244 updatetitle(c);
1245 if(c == sel)
1246 drawbar(c->monitor);
1247 }
1248 }
1249 }
1250
1251 void
1252 quit(const char *arg) {
1253 readin = running = False;
1254 }
1255
1256 void
1257 reapply(const char *arg) {
1258 static Bool zerotags[LENGTH(tags)] = { 0 };
1259 Client *c;
1260
1261 for(c = clients; c; c = c->next) {
1262 memcpy(c->tags, zerotags, sizeof zerotags);
1263 applyrules(c);
1264 }
1265 arrange();
1266 }
1267
1268 void
1269 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1270 Monitor *m;
1271 XWindowChanges wc;
1272
1273 m = c->monitor;
1274
1275 if(sizehints) {
1276 /* set minimum possible */
1277 if (w < 1)
1278 w = 1;
1279 if (h < 1)
1280 h = 1;
1281
1282 /* temporarily remove base dimensions */
1283 w -= c->basew;
1284 h -= c->baseh;
1285
1286 /* adjust for aspect limits */
1287 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1288 if (w * c->maxay > h * c->maxax)
1289 w = h * c->maxax / c->maxay;
1290 else if (w * c->minay < h * c->minax)
1291 h = w * c->minay / c->minax;
1292 }
1293
1294 /* adjust for increment value */
1295 if(c->incw)
1296 w -= w % c->incw;
1297 if(c->inch)
1298 h -= h % c->inch;
1299
1300 /* restore base dimensions */
1301 w += c->basew;
1302 h += c->baseh;
1303
1304 if(c->minw > 0 && w < c->minw)
1305 w = c->minw;
1306 if(c->minh > 0 && h < c->minh)
1307 h = c->minh;
1308 if(c->maxw > 0 && w > c->maxw)
1309 w = c->maxw;
1310 if(c->maxh > 0 && h > c->maxh)
1311 h = c->maxh;
1312 }
1313 if(w <= 0 || h <= 0)
1314 return;
1315 if(x > m->sw)
1316 x = m->sw - w - 2 * c->border;
1317 if(y > m->sh)
1318 y = m->sh - h - 2 * c->border;
1319 if(x + w + 2 * c->border < m->sx)
1320 x = m->sx;
1321 if(y + h + 2 * c->border < m->sy)
1322 y = m->sy;
1323 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1324 c->x = wc.x = x;
1325 c->y = wc.y = y;
1326 c->w = wc.width = w;
1327 c->h = wc.height = h;
1328 wc.border_width = c->border;
1329 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1330 configure(c);
1331 XSync(dpy, False);
1332 }
1333 }
1334
1335 void
1336 resizemouse(Client *c) {
1337 int ocx, ocy;
1338 int nw, nh;
1339 Monitor *m;
1340 XEvent ev;
1341
1342 ocx = c->x;
1343 ocy = c->y;
1344 m = c->monitor;
1345 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1346 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1347 return;
1348 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1349 for(;;) {
1350 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1351 switch(ev.type) {
1352 case ButtonRelease:
1353 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1354 c->w + c->border - 1, c->h + c->border - 1);
1355 XUngrabPointer(dpy, CurrentTime);
1356 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1357 return;
1358 case ConfigureRequest:
1359 case Expose:
1360 case MapRequest:
1361 handler[ev.type](&ev);
1362 break;
1363 case MotionNotify:
1364 XSync(dpy, False);
1365 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1366 nw = 1;
1367 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1368 nh = 1;
1369 if((m->layout->arrange != floating) && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1370 togglefloating(NULL);
1371 if((m->layout->arrange == floating) || c->isfloating)
1372 resize(c, c->x, c->y, nw, nh, True);
1373 break;
1374 }
1375 }
1376 }
1377
1378 void
1379 restack(Monitor *m) {
1380 Client *c;
1381 XEvent ev;
1382 XWindowChanges wc;
1383
1384 drawbar(m);
1385 if(!sel)
1386 return;
1387 if(sel->isfloating || (m->layout->arrange == floating))
1388 XRaiseWindow(dpy, sel->win);
1389 if(m->layout->arrange != floating) {
1390 wc.stack_mode = Below;
1391 wc.sibling = m->barwin;
1392 if(!sel->isfloating) {
1393 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1394 wc.sibling = sel->win;
1395 }
1396 for(c = nexttiled(clients, m); c; c = nexttiled(c->next, m)) {
1397 if(c == sel)
1398 continue;
1399 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1400 wc.sibling = c->win;
1401 }
1402 }
1403 XSync(dpy, False);
1404 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1405 }
1406
1407 void
1408 run(void) {
1409 char *p;
1410 char buf[sizeof stext];
1411 fd_set rd;
1412 int r, xfd;
1413 unsigned int len, offset;
1414 XEvent ev;
1415
1416 /* main event loop, also reads status text from stdin */
1417 XSync(dpy, False);
1418 xfd = ConnectionNumber(dpy);
1419 readin = True;
1420 offset = 0;
1421 len = sizeof stext - 1;
1422 buf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1423 while(running) {
1424 FD_ZERO(&rd);
1425 if(readin)
1426 FD_SET(STDIN_FILENO, &rd);
1427 FD_SET(xfd, &rd);
1428 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1429 if(errno == EINTR)
1430 continue;
1431 eprint("select failed\n");
1432 }
1433 if(FD_ISSET(STDIN_FILENO, &rd)) {
1434 switch((r = read(STDIN_FILENO, buf + offset, len - offset))) {
1435 case -1:
1436 strncpy(stext, strerror(errno), len);
1437 readin = False;
1438 break;
1439 case 0:
1440 strncpy(stext, "EOF", 4);
1441 readin = False;
1442 break;
1443 default:
1444 for(p = buf + offset; r > 0; p++, r--, offset++)
1445 if(*p == '\n' || *p == '\0') {
1446 *p = '\0';
1447 strncpy(stext, buf, len);
1448 p += r - 1; /* p is buf + offset + r - 1 */
1449 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1450 offset = r;
1451 if(r)
1452 memmove(buf, p - r + 1, r);
1453 break;
1454 }
1455 break;
1456 }
1457 drawbar(selmonitor);
1458 }
1459 while(XPending(dpy)) {
1460 XNextEvent(dpy, &ev);
1461 if(handler[ev.type])
1462 (handler[ev.type])(&ev); /* call handler */
1463 }
1464 }
1465 }
1466
1467 void
1468 scan(void) {
1469 unsigned int i, num;
1470 Window *wins, d1, d2;
1471 XWindowAttributes wa;
1472
1473 wins = NULL;
1474 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1475 for(i = 0; i < num; i++) {
1476 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1477 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1478 continue;
1479 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1480 manage(wins[i], &wa);
1481 }
1482 for(i = 0; i < num; i++) { /* now the transients */
1483 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1484 continue;
1485 if(XGetTransientForHint(dpy, wins[i], &d1)
1486 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1487 manage(wins[i], &wa);
1488 }
1489 }
1490 if(wins)
1491 XFree(wins);
1492 }
1493
1494 void
1495 setclientstate(Client *c, long state) {
1496 long data[] = {state, None};
1497
1498 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1499 PropModeReplace, (unsigned char *)data, 2);
1500 }
1501
1502 void
1503 setlayout(const char *arg) {
1504 unsigned int i;
1505 Monitor *m = monitorat();
1506
1507 if(!arg) {
1508 m->layout++;
1509 if(m->layout == &layouts[LENGTH(layouts)])
1510 m->layout = &layouts[0];
1511 }
1512 else {
1513 for(i = 0; i < LENGTH(layouts); i++)
1514 if(!strcmp(arg, layouts[i].symbol))
1515 break;
1516 if(i == LENGTH(layouts))
1517 return;
1518 m->layout = &layouts[i];
1519 }
1520 if(sel)
1521 arrange();
1522 else
1523 drawbar(m);
1524 }
1525
1526 void
1527 setmwfact(const char *arg) {
1528 double delta;
1529
1530 Monitor *m = monitorat();
1531
1532 if(!domwfact)
1533 return;
1534 /* arg handling, manipulate mwfact */
1535 if(arg == NULL)
1536 m->mwfact = MWFACT;
1537 else if(sscanf(arg, "%lf", &delta) == 1) {
1538 if(arg[0] == '+' || arg[0] == '-')
1539 m->mwfact += delta;
1540 else
1541 m->mwfact = delta;
1542 if(m->mwfact < 0.1)
1543 m->mwfact = 0.1;
1544 else if(m->mwfact > 0.9)
1545 m->mwfact = 0.9;
1546 }
1547 arrange();
1548 }
1549
1550 void
1551 setup(void) {
1552 unsigned int i;
1553 Monitor *m;
1554 XSetWindowAttributes wa;
1555 XineramaScreenInfo *info = NULL;
1556
1557 /* init atoms */
1558 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1559 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1560 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1561 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1562 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1563 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1564
1565 /* init cursors */
1566 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1567 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1568 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1569
1570 // init screens/monitors first
1571 if((isxinerama = XineramaIsActive(dpy)))
1572 info = XineramaQueryScreens(dpy, &mcount);
1573 selmonitor = monitors = emallocz(mcount * sizeof(Monitor));
1574
1575 screen = DefaultScreen(dpy);
1576 root = RootWindow(dpy, screen);
1577
1578 /* init appearance */
1579 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1580 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1581 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1582 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1583 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1584 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1585 initfont(FONT);
1586 dc.h = bh = dc.font.height + 2;
1587 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1588 dc.gc = XCreateGC(dpy, root, 0, 0);
1589 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1590 if(!dc.font.set)
1591 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1592
1593 for(blw = i = 0; i < LENGTH(layouts); i++) {
1594 i = textw(layouts[i].symbol);
1595 if(i > blw)
1596 blw = i;
1597 }
1598 for(i = 0; i < mcount; i++) {
1599 /* init geometry */
1600 m = &monitors[i];
1601 m->id = i;
1602
1603 if (mcount != 1 && isxinerama) {
1604 m->sx = info[i].x_org;
1605 m->sy = info[i].y_org;
1606 m->sw = info[i].width;
1607 m->sh = info[i].height;
1608 fprintf(stderr, "monitor[%d]: %d,%d,%d,%d\n", i, m->sx, m->sy, m->sw, m->sh);
1609 }
1610 else {
1611 m->sx = 0;
1612 m->sy = 0;
1613 m->sw = DisplayWidth(dpy, screen);
1614 m->sh = DisplayHeight(dpy, screen);
1615 }
1616
1617 m->seltags = emallocz(sizeof initags);
1618 m->prevtags = emallocz(sizeof initags);
1619
1620 memcpy(m->seltags, initags, sizeof initags);
1621 memcpy(m->prevtags, initags, sizeof initags);
1622
1623 /* init layouts */
1624 m->mwfact = MWFACT;
1625 m->layout = &layouts[0];
1626
1627 // TODO: bpos per screen?
1628 bpos = BARPOS;
1629 wa.override_redirect = 1;
1630 wa.background_pixmap = ParentRelative;
1631 wa.event_mask = ButtonPressMask | ExposureMask;
1632
1633 /* init bars */
1634 m->barwin = XCreateWindow(dpy, root, m->sx, m->sy, m->sw, bh, 0,
1635 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1636 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1637 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1638 updatebarpos(m);
1639 XMapRaised(dpy, m->barwin);
1640 strcpy(stext, "dwm-"VERSION);
1641
1642 /* EWMH support per monitor */
1643 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1644 PropModeReplace, (unsigned char *) netatom, NetLast);
1645
1646 /* select for events */
1647 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1648 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1649 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1650 XSelectInput(dpy, root, wa.event_mask);
1651
1652 drawbar(m);
1653 }
1654 if(info)
1655 XFree(info);
1656
1657 /* grab keys */
1658 grabkeys();
1659
1660 /* init tags */
1661 compileregs();
1662
1663 selmonitor = monitorat();
1664 fprintf(stderr, "selmonitor == %d\n", selmonitor - monitors);
1665 }
1666
1667 void
1668 spawn(const char *arg) {
1669 static char *shell = NULL;
1670
1671 if(!shell && !(shell = getenv("SHELL")))
1672 shell = "/bin/sh";
1673 if(!arg)
1674 return;
1675 /* The double-fork construct avoids zombie processes and keeps the code
1676 * clean from stupid signal handlers. */
1677 if(fork() == 0) {
1678 if(fork() == 0) {
1679 if(dpy)
1680 close(ConnectionNumber(dpy));
1681 setsid();
1682 execl(shell, shell, "-c", arg, (char *)NULL);
1683 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1684 perror(" failed");
1685 }
1686 exit(0);
1687 }
1688 wait(0);
1689 }
1690
1691 void
1692 tag(const char *arg) {
1693 unsigned int i;
1694
1695 if(!sel)
1696 return;
1697 for(i = 0; i < LENGTH(tags); i++)
1698 sel->tags[i] = (NULL == arg);
1699 sel->tags[idxoftag(arg)] = True;
1700 arrange();
1701 }
1702
1703 unsigned int
1704 textnw(const char *text, unsigned int len) {
1705 XRectangle r;
1706
1707 if(dc.font.set) {
1708 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1709 return r.width;
1710 }
1711 return XTextWidth(dc.font.xfont, text, len);
1712 }
1713
1714 unsigned int
1715 textw(const char *text) {
1716 return textnw(text, strlen(text)) + dc.font.height;
1717 }
1718
1719 void
1720 tile(Monitor *m) {
1721 unsigned int i, n, nx, ny, nw, nh, mw, th;
1722 Client *c, *mc;
1723
1724 domwfact = dozoom = True;
1725
1726 nx = ny = nw = 0; /* gcc stupidity requires this */
1727
1728 for(n = 0, c = nexttiled(clients, m); c; c = nexttiled(c->next, m))
1729 n++;
1730
1731 /* window geoms */
1732 mw = (n == 1) ? m->waw : m->mwfact * m->waw;
1733 th = (n > 1) ? m->wah / (n - 1) : 0;
1734 if(n > 1 && th < bh)
1735 th = m->wah;
1736
1737 for(i = 0, c = mc = nexttiled(clients, m); c; c = nexttiled(c->next, m)) {
1738 if(i == 0) { /* master */
1739 nx = m->wax;
1740 ny = m->way;
1741 nw = mw - 2 * c->border;
1742 nh = m->wah - 2 * c->border;
1743 }
1744 else { /* tile window */
1745 if(i == 1) {
1746 ny = m->way;
1747 nx += mc->w + 2 * mc->border;
1748 nw = m->waw - mw - 2 * c->border;
1749 }
1750 if(i + 1 == n) /* remainder */
1751 nh = (m->way + m->wah) - ny - 2 * c->border;
1752 else
1753 nh = th - 2 * c->border;
1754 }
1755 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1756 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1757 /* client doesn't accept size constraints */
1758 resize(c, nx, ny, nw, nh, False);
1759 if(n > 1 && th != m->wah)
1760 ny = c->y + c->h + 2 * c->border;
1761
1762 i++;
1763 }
1764 }
1765 void
1766 togglebar(const char *arg) {
1767 if(bpos == BarOff)
1768 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1769 else
1770 bpos = BarOff;
1771 updatebarpos(monitorat());
1772 arrange();
1773 }
1774
1775 void
1776 togglefloating(const char *arg) {
1777 if(!sel)
1778 return;
1779 sel->isfloating = !sel->isfloating;
1780 if(sel->isfloating)
1781 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1782 arrange();
1783 }
1784
1785 void
1786 toggletag(const char *arg) {
1787 unsigned int i, j;
1788
1789 if(!sel)
1790 return;
1791 i = idxoftag(arg);
1792 sel->tags[i] = !sel->tags[i];
1793 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1794 if(j == LENGTH(tags))
1795 sel->tags[i] = True; /* at least one tag must be enabled */
1796 arrange();
1797 }
1798
1799 void
1800 toggleview(const char *arg) {
1801 unsigned int i, j;
1802
1803 Monitor *m = monitorat();
1804
1805 i = idxoftag(arg);
1806 m->seltags[i] = !m->seltags[i];
1807 for(j = 0; j < LENGTH(tags) && !m->seltags[j]; j++);
1808 if(j == LENGTH(tags))
1809 m->seltags[i] = True; /* at least one tag must be viewed */
1810 arrange();
1811 }
1812
1813 void
1814 unban(Client *c) {
1815 if(!c->isbanned)
1816 return;
1817 XMoveWindow(dpy, c->win, c->x, c->y);
1818 c->isbanned = False;
1819 }
1820
1821 void
1822 unmanage(Client *c) {
1823 XWindowChanges wc;
1824
1825 wc.border_width = c->oldborder;
1826 /* The server grab construct avoids race conditions. */
1827 XGrabServer(dpy);
1828 XSetErrorHandler(xerrordummy);
1829 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1830 detach(c);
1831 detachstack(c);
1832 if(sel == c)
1833 focus(NULL);
1834 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1835 setclientstate(c, WithdrawnState);
1836 free(c->tags);
1837 free(c);
1838 XSync(dpy, False);
1839 XSetErrorHandler(xerror);
1840 XUngrabServer(dpy);
1841 arrange();
1842 }
1843
1844 void
1845 unmapnotify(XEvent *e) {
1846 Client *c;
1847 XUnmapEvent *ev = &e->xunmap;
1848
1849 if((c = getclient(ev->window)))
1850 unmanage(c);
1851 }
1852
1853 void
1854 updatebarpos(Monitor *m) {
1855 XEvent ev;
1856
1857 m->wax = m->sx;
1858 m->way = m->sy;
1859 m->wah = m->sh;
1860 m->waw = m->sw;
1861 switch(bpos) {
1862 default:
1863 m->wah -= bh;
1864 m->way += bh;
1865 XMoveWindow(dpy, m->barwin, m->sx, m->sy);
1866 break;
1867 case BarBot:
1868 m->wah -= bh;
1869 XMoveWindow(dpy, m->barwin, m->sx, m->sy + m->wah);
1870 break;
1871 case BarOff:
1872 XMoveWindow(dpy, m->barwin, m->sx, m->sy - bh);
1873 break;
1874 }
1875 XSync(dpy, False);
1876 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1877 }
1878
1879 void
1880 updatesizehints(Client *c) {
1881 long msize;
1882 XSizeHints size;
1883
1884 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1885 size.flags = PSize;
1886 c->flags = size.flags;
1887 if(c->flags & PBaseSize) {
1888 c->basew = size.base_width;
1889 c->baseh = size.base_height;
1890 }
1891 else if(c->flags & PMinSize) {
1892 c->basew = size.min_width;
1893 c->baseh = size.min_height;
1894 }
1895 else
1896 c->basew = c->baseh = 0;
1897 if(c->flags & PResizeInc) {
1898 c->incw = size.width_inc;
1899 c->inch = size.height_inc;
1900 }
1901 else
1902 c->incw = c->inch = 0;
1903 if(c->flags & PMaxSize) {
1904 c->maxw = size.max_width;
1905 c->maxh = size.max_height;
1906 }
1907 else
1908 c->maxw = c->maxh = 0;
1909 if(c->flags & PMinSize) {
1910 c->minw = size.min_width;
1911 c->minh = size.min_height;
1912 }
1913 else if(c->flags & PBaseSize) {
1914 c->minw = size.base_width;
1915 c->minh = size.base_height;
1916 }
1917 else
1918 c->minw = c->minh = 0;
1919 if(c->flags & PAspect) {
1920 c->minax = size.min_aspect.x;
1921 c->maxax = size.max_aspect.x;
1922 c->minay = size.min_aspect.y;
1923 c->maxay = size.max_aspect.y;
1924 }
1925 else
1926 c->minax = c->maxax = c->minay = c->maxay = 0;
1927 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1928 && c->maxw == c->minw && c->maxh == c->minh);
1929 }
1930
1931 void
1932 updatetitle(Client *c) {
1933 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1934 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1935 }
1936
1937 void
1938 updatewmhints(Client *c) {
1939 XWMHints *wmh;
1940
1941 if((wmh = XGetWMHints(dpy, c->win))) {
1942 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1943 XFree(wmh);
1944 }
1945 }
1946
1947 /* There's no way to check accesses to destroyed windows, thus those cases are
1948 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1949 * default error handler, which may call exit. */
1950 int
1951 xerror(Display *dpy, XErrorEvent *ee) {
1952 if(ee->error_code == BadWindow
1953 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1954 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1955 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1956 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1957 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1958 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1959 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1960 return 0;
1961 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1962 ee->request_code, ee->error_code);
1963 return xerrorxlib(dpy, ee); /* may call exit */
1964 }
1965
1966 int
1967 xerrordummy(Display *dsply, XErrorEvent *ee) {
1968 return 0;
1969 }
1970
1971 /* Startup Error handler to check if another window manager
1972 * is already running. */
1973 int
1974 xerrorstart(Display *dsply, XErrorEvent *ee) {
1975 otherwm = True;
1976 return -1;
1977 }
1978
1979 void
1980 view(const char *arg) {
1981 unsigned int i;
1982 Bool tmp[LENGTH(tags)];
1983 Monitor *m = monitorat();
1984
1985 for(i = 0; i < LENGTH(tags); i++)
1986 tmp[i] = (NULL == arg);
1987 tmp[idxoftag(arg)] = True;
1988 if(memcmp(m->seltags, tmp, sizeof initags) != 0) {
1989 memcpy(m->prevtags, m->seltags, sizeof initags);
1990 memcpy(m->seltags, tmp, sizeof initags);
1991 arrange();
1992 }
1993 }
1994
1995 void
1996 viewprevtag(const char *arg) {
1997 static Bool tmp[LENGTH(tags)];
1998
1999 Monitor *m = monitorat();
2000
2001 memcpy(tmp, m->seltags, sizeof initags);
2002 memcpy(m->seltags, m->prevtags, sizeof initags);
2003 memcpy(m->prevtags, tmp, sizeof initags);
2004 arrange();
2005 }
2006
2007 void
2008 zoom(const char *arg) {
2009 Client *c = sel;
2010
2011 if(!sel || !dozoom || sel->isfloating)
2012 return;
2013 if(c == nexttiled(clients, c->monitor))
2014 if(!(c = nexttiled(c->next, c->monitor)))
2015 return;
2016 detach(c);
2017 attach(c);
2018 focus(c);
2019 arrange();
2020 }
2021
2022 void
2023 movetomonitor(const char *arg) {
2024 int i;
2025
2026 if (sel)
2027 return;
2028 if(arg)
2029 i = atoi(arg);
2030 else {
2031 for(i = 0; &monitors[i] != sel->monitor && i < mcount; i++);
2032 i++;
2033 }
2034 sel->monitor = &monitors[i % mcount];
2035
2036 memcpy(sel->tags, sel->monitor->seltags, sizeof initags);
2037 resize(sel, sel->monitor->wax, sel->monitor->way, sel->w, sel->h, True);
2038 arrange();
2039 }
2040
2041 void
2042 selectmonitor(const char *arg) {
2043 int i;
2044 Monitor *m;
2045
2046 if(arg)
2047 i = atoi(arg);
2048 else {
2049 for(i = 0; &monitors[i] != sel->monitor && i < mcount; i++);
2050 i++;
2051 }
2052 m = &monitors[i % mcount];
2053 XWarpPointer(dpy, None, root, 0, 0, 0, 0, m->wax+m->waw/2, m->way+m->wah/2);
2054 focus(NULL);
2055 }
2056
2057
2058 int
2059 main(int argc, char *argv[]) {
2060 if(argc == 2 && !strcmp("-v", argv[1]))
2061 eprint("dwm-"VERSION", © 2006-2008 Anselm R. Garbe, Sander van Dijk, "
2062 "Jukka Salmi, Premysl Hruby, Szabolcs Nagy, Christof Musik\n");
2063 else if(argc != 1)
2064 eprint("usage: dwm [-v]\n");
2065
2066 setlocale(LC_CTYPE, "");
2067 if(!(dpy = XOpenDisplay(0)))
2068 eprint("dwm: cannot open display\n");
2069
2070 checkotherwm();
2071 setup();
2072 scan();
2073 run();
2074 cleanup();
2075
2076 XCloseDisplay(dpy);
2077 return 0;
2078 }