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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 Client Client;
64 struct Client {
65 char name[256];
66 int x, y, w, h;
67 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
68 int minax, maxax, minay, maxay;
69 long flags;
70 unsigned int border, oldborder;
71 Bool isbanned, isfixed, isfloating, isurgent;
72 Bool *tags;
73 Client *next;
74 Client *prev;
75 Client *snext;
76 Window win;
77 int monitor;
78 };
79
80 typedef struct {
81 int x, y, w, h;
82 unsigned long norm[ColLast];
83 unsigned long sel[ColLast];
84 Drawable drawable;
85 GC gc;
86 struct {
87 int ascent;
88 int descent;
89 int height;
90 XFontSet set;
91 XFontStruct *xfont;
92 } font;
93 } DC; /* draw context */
94
95 typedef struct {
96 unsigned long mod;
97 KeySym keysym;
98 void (*func)(const char *arg);
99 const char *arg;
100 } Key;
101
102 typedef struct Monitor Monitor;
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(unsigned int monitor, unsigned int t);
169 Bool isprotodel(Client *c);
170 Bool isurgent(unsigned int monitor, unsigned int t);
171 Bool isvisible(Client *c, int monitor);
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 void movemouse(Client *c);
178 Client *nexttiled(Client *c, int monitor);
179 void propertynotify(XEvent *e);
180 void quit(const char *arg);
181 void reapply(const char *arg);
182 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
183 void resizemouse(Client *c);
184 void restack(Monitor *m);
185 void run(void);
186 void scan(void);
187 void setclientstate(Client *c, long state);
188 void setlayout(const char *arg);
189 void setmwfact(const char *arg);
190 void setup(void);
191 void spawn(const char *arg);
192 void tag(const char *arg);
193 unsigned int textnw(const char *text, unsigned int len);
194 unsigned int textw(const char *text);
195 void tile(Monitor *m);
196 void togglebar(const char *arg);
197 void togglefloating(const char *arg);
198 void toggletag(const char *arg);
199 void toggleview(const char *arg);
200 void unban(Client *c);
201 void unmanage(Client *c);
202 void unmapnotify(XEvent *e);
203 void updatebarpos(Monitor *m);
204 void updatesizehints(Client *c);
205 void updatetitle(Client *c);
206 void updatewmhints(Client *c);
207 void view(const char *arg);
208 void viewprevtag(const char *arg); /* views previous selected tags */
209 int xerror(Display *dpy, XErrorEvent *ee);
210 int xerrordummy(Display *dsply, XErrorEvent *ee);
211 int xerrorstart(Display *dsply, XErrorEvent *ee);
212 void zoom(const char *arg);
213 int monitorat(void);
214 void movetomonitor(const char *arg);
215 void selectmonitor(const char *arg);
216
217 /* variables */
218 char stext[256];
219 int mcount = 1;
220 int selmonitor = 0;
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 = 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, monitors[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 monitors[selmonitor].layout->arrange(&monitors[selmonitor]);
312 focus(NULL);
313 restack(&monitors[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 * monitors[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 = &monitors[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(&monitors[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(&monitors[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 = &monitors[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 = &monitors[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->id); 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->id, j));
576 drawsquare(m, c && c->tags[j] && c->monitor == m->id,
577 isoccupied(m->id, j), isurgent(m->id, j), dc.sel);
578 }
579 else {
580 drawtext(m, tags[j], dc.norm, isurgent(m->id, j));
581 drawsquare(m, c && c->tags[j] && c->monitor == m->id,
582 isoccupied(m->id, j), isurgent(m->id, 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->id == 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);
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->id))
727 resize(c, c->x, c->y, c->w, c->h, True);
728 }
729
730 void
731 focus(Client *c) {
732 Monitor *m;
733
734 if(c)
735 selmonitor = c->monitor;
736 m = &monitors[selmonitor];
737 if(!c || (c && !isvisible(c, selmonitor)))
738 for(c = stack; c && !isvisible(c, c->monitor); c = c->snext);
739 if(sel && sel != c) {
740 grabbuttons(sel, False);
741 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
742 }
743 if(c) {
744 detachstack(c);
745 attachstack(c);
746 grabbuttons(c, True);
747 }
748 sel = c;
749 if(c) {
750 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
751 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
752 selmonitor = c->monitor;
753 }
754 else
755 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
756 drawbar(&monitors[selmonitor]);
757 }
758
759 void
760 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
761 XFocusChangeEvent *ev = &e->xfocus;
762
763 if(sel && ev->window != sel->win)
764 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
765 }
766
767 void
768 focusnext(const char *arg) {
769 Client *c;
770
771 if(!sel)
772 return;
773 for(c = sel->next; c && !isvisible(c, selmonitor); c = c->next);
774 if(!c)
775 for(c = clients; c && !isvisible(c, selmonitor); c = c->next);
776 if(c) {
777 focus(c);
778 restack(&monitors[c->monitor]);
779 }
780 }
781
782 void
783 focusprev(const char *arg) {
784 Client *c;
785
786 if(!sel)
787 return;
788 for(c = sel->prev; c && !isvisible(c, selmonitor); c = c->prev);
789 if(!c) {
790 for(c = clients; c && c->next; c = c->next);
791 for(; c && !isvisible(c, selmonitor); c = c->prev);
792 }
793 if(c) {
794 focus(c);
795 restack(&monitors[c->monitor]);
796 }
797 }
798
799 Client *
800 getclient(Window w) {
801 Client *c;
802
803 for(c = clients; c && c->win != w; c = c->next);
804 return c;
805 }
806
807 unsigned long
808 getcolor(const char *colstr) {
809 Colormap cmap = DefaultColormap(dpy, screen);
810 XColor color;
811
812 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
813 eprint("error, cannot allocate color '%s'\n", colstr);
814 return color.pixel;
815 }
816
817 Monitor *
818 getmonitor(Window barwin) {
819 unsigned int i;
820
821 for(i = 0; i < mcount; i++)
822 if(monitors[i].barwin == barwin)
823 return &monitors[i];
824 return NULL;
825 }
826
827 long
828 getstate(Window w) {
829 int format, status;
830 long result = -1;
831 unsigned char *p = NULL;
832 unsigned long n, extra;
833 Atom real;
834
835 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
836 &real, &format, &n, &extra, (unsigned char **)&p);
837 if(status != Success)
838 return -1;
839 if(n != 0)
840 result = *p;
841 XFree(p);
842 return result;
843 }
844
845 Bool
846 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
847 char **list = NULL;
848 int n;
849 XTextProperty name;
850
851 if(!text || size == 0)
852 return False;
853 text[0] = '\0';
854 XGetTextProperty(dpy, w, &name, atom);
855 if(!name.nitems)
856 return False;
857 if(name.encoding == XA_STRING)
858 strncpy(text, (char *)name.value, size - 1);
859 else {
860 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
861 && n > 0 && *list) {
862 strncpy(text, *list, size - 1);
863 XFreeStringList(list);
864 }
865 }
866 text[size - 1] = '\0';
867 XFree(name.value);
868 return True;
869 }
870
871 void
872 grabbuttons(Client *c, Bool focused) {
873 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
874
875 if(focused) {
876 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
877 GrabModeAsync, GrabModeSync, None, None);
878 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
879 GrabModeAsync, GrabModeSync, None, None);
880 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
881 GrabModeAsync, GrabModeSync, None, None);
882 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
883 GrabModeAsync, GrabModeSync, None, None);
884
885 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
886 GrabModeAsync, GrabModeSync, None, None);
887 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
888 GrabModeAsync, GrabModeSync, None, None);
889 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
890 GrabModeAsync, GrabModeSync, None, None);
891 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
892 GrabModeAsync, GrabModeSync, None, None);
893
894 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
895 GrabModeAsync, GrabModeSync, None, None);
896 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
897 GrabModeAsync, GrabModeSync, None, None);
898 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
899 GrabModeAsync, GrabModeSync, None, None);
900 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
901 GrabModeAsync, GrabModeSync, None, None);
902 }
903 else
904 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
905 GrabModeAsync, GrabModeSync, None, None);
906 }
907
908 void
909 grabkeys(void) {
910 unsigned int i, j;
911 KeyCode code;
912 XModifierKeymap *modmap;
913
914 /* init modifier map */
915 modmap = XGetModifierMapping(dpy);
916 for(i = 0; i < 8; i++)
917 for(j = 0; j < modmap->max_keypermod; j++) {
918 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
919 numlockmask = (1 << i);
920 }
921 XFreeModifiermap(modmap);
922
923 XUngrabKey(dpy, AnyKey, AnyModifier, root);
924 for(i = 0; i < LENGTH(keys); i++) {
925 code = XKeysymToKeycode(dpy, keys[i].keysym);
926 XGrabKey(dpy, code, keys[i].mod, root, True,
927 GrabModeAsync, GrabModeAsync);
928 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
929 GrabModeAsync, GrabModeAsync);
930 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
931 GrabModeAsync, GrabModeAsync);
932 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
933 GrabModeAsync, GrabModeAsync);
934 }
935 }
936
937 unsigned int
938 idxoftag(const char *tag) {
939 unsigned int i;
940
941 for(i = 0; (i < LENGTH(tags)) && (tags[i] != tag); i++);
942 return (i < LENGTH(tags)) ? i : 0;
943 }
944
945 void
946 initfont(const char *fontstr) {
947 char *def, **missing;
948 int i, n;
949
950 missing = NULL;
951 if(dc.font.set)
952 XFreeFontSet(dpy, dc.font.set);
953 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
954 if(missing) {
955 while(n--)
956 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
957 XFreeStringList(missing);
958 }
959 if(dc.font.set) {
960 XFontSetExtents *font_extents;
961 XFontStruct **xfonts;
962 char **font_names;
963 dc.font.ascent = dc.font.descent = 0;
964 font_extents = XExtentsOfFontSet(dc.font.set);
965 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
966 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
967 if(dc.font.ascent < (*xfonts)->ascent)
968 dc.font.ascent = (*xfonts)->ascent;
969 if(dc.font.descent < (*xfonts)->descent)
970 dc.font.descent = (*xfonts)->descent;
971 xfonts++;
972 }
973 }
974 else {
975 if(dc.font.xfont)
976 XFreeFont(dpy, dc.font.xfont);
977 dc.font.xfont = NULL;
978 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
979 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
980 eprint("error, cannot load font: '%s'\n", fontstr);
981 dc.font.ascent = dc.font.xfont->ascent;
982 dc.font.descent = dc.font.xfont->descent;
983 }
984 dc.font.height = dc.font.ascent + dc.font.descent;
985 }
986
987 Bool
988 isoccupied(unsigned int monitor, unsigned int t) {
989 Client *c;
990
991 for(c = clients; c; c = c->next)
992 if(c->tags[t] && c->monitor == monitor)
993 return True;
994 return False;
995 }
996
997 Bool
998 isprotodel(Client *c) {
999 int i, n;
1000 Atom *protocols;
1001 Bool ret = False;
1002
1003 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1004 for(i = 0; !ret && i < n; i++)
1005 if(protocols[i] == wmatom[WMDelete])
1006 ret = True;
1007 XFree(protocols);
1008 }
1009 return ret;
1010 }
1011
1012 Bool
1013 isurgent(unsigned int monitor, unsigned int t) {
1014 Client *c;
1015
1016 for(c = clients; c; c = c->next)
1017 if(c->monitor == monitor && c->isurgent && c->tags[t])
1018 return True;
1019 return False;
1020 }
1021
1022 Bool
1023 isvisible(Client *c, int monitor) {
1024 unsigned int i;
1025
1026 if(c->monitor != monitor)
1027 return False;
1028 for(i = 0; i < LENGTH(tags); i++)
1029 if(c->tags[i] && monitors[c->monitor].seltags[i])
1030 return True;
1031 return False;
1032 }
1033
1034 void
1035 keypress(XEvent *e) {
1036 unsigned int i;
1037 KeySym keysym;
1038 XKeyEvent *ev;
1039
1040 ev = &e->xkey;
1041 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1042 for(i = 0; i < LENGTH(keys); i++)
1043 if(keysym == keys[i].keysym
1044 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1045 {
1046 if(keys[i].func)
1047 keys[i].func(keys[i].arg);
1048 }
1049 }
1050
1051 void
1052 killclient(const char *arg) {
1053 XEvent ev;
1054
1055 if(!sel)
1056 return;
1057 if(isprotodel(sel)) {
1058 ev.type = ClientMessage;
1059 ev.xclient.window = sel->win;
1060 ev.xclient.message_type = wmatom[WMProtocols];
1061 ev.xclient.format = 32;
1062 ev.xclient.data.l[0] = wmatom[WMDelete];
1063 ev.xclient.data.l[1] = CurrentTime;
1064 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1065 }
1066 else
1067 XKillClient(dpy, sel->win);
1068 }
1069
1070 void
1071 manage(Window w, XWindowAttributes *wa) {
1072 Client *c, *t = NULL;
1073 Monitor *m;
1074 Status rettrans;
1075 Window trans;
1076 XWindowChanges wc;
1077
1078 c = emallocz(sizeof(Client));
1079 c->tags = emallocz(sizeof initags);
1080 c->win = w;
1081
1082 applyrules(c);
1083
1084 m = &monitors[c->monitor];
1085
1086 c->x = wa->x + m->sx;
1087 c->y = wa->y + m->sy;
1088 c->w = wa->width;
1089 c->h = wa->height;
1090 c->oldborder = wa->border_width;
1091
1092 if(c->w == m->sw && c->h == m->sh) {
1093 c->x = m->sx;
1094 c->y = m->sy;
1095 c->border = wa->border_width;
1096 }
1097 else {
1098 if(c->x + c->w + 2 * c->border > m->wax + m->waw)
1099 c->x = m->wax + m->waw - c->w - 2 * c->border;
1100 if(c->y + c->h + 2 * c->border > m->way + m->wah)
1101 c->y = m->way + m->wah - c->h - 2 * c->border;
1102 if(c->x < m->wax)
1103 c->x = m->wax;
1104 if(c->y < m->way)
1105 c->y = m->way;
1106 c->border = BORDERPX;
1107 }
1108 wc.border_width = c->border;
1109 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1110 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1111 configure(c); /* propagates border_width, if size doesn't change */
1112 updatesizehints(c);
1113 XSelectInput(dpy, w, EnterWindowMask | FocusChangeMask | PropertyChangeMask | StructureNotifyMask);
1114 grabbuttons(c, False);
1115 updatetitle(c);
1116 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1117 for(t = clients; t && t->win != trans; t = t->next);
1118 if(t)
1119 memcpy(c->tags, t->tags, sizeof initags);
1120 if(!c->isfloating)
1121 c->isfloating = (rettrans == Success) || c->isfixed;
1122 attach(c);
1123 attachstack(c);
1124 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1125 ban(c);
1126 XMapWindow(dpy, c->win);
1127 setclientstate(c, NormalState);
1128 arrange();
1129 }
1130
1131 void
1132 mappingnotify(XEvent *e) {
1133 XMappingEvent *ev = &e->xmapping;
1134
1135 XRefreshKeyboardMapping(ev);
1136 if(ev->request == MappingKeyboard)
1137 grabkeys();
1138 }
1139
1140 void
1141 maprequest(XEvent *e) {
1142 static XWindowAttributes wa;
1143 XMapRequestEvent *ev = &e->xmaprequest;
1144
1145 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1146 return;
1147 if(wa.override_redirect)
1148 return;
1149 if(!getclient(ev->window))
1150 manage(ev->window, &wa);
1151 }
1152
1153 int
1154 monitorat() {
1155 int i, x, y;
1156 Window win;
1157 unsigned int mask;
1158
1159 XQueryPointer(dpy, root, &win, &win, &x, &y, &i, &i, &mask);
1160 for(i = 0; i < mcount; i++) {
1161 if((x >= monitors[i].sx && x < monitors[i].sx + monitors[i].sw)
1162 && (y >= monitors[i].sy && y < monitors[i].sy + monitors[i].sh)) {
1163 return i;
1164 }
1165 }
1166 return 0;
1167 }
1168
1169 void
1170 movemouse(Client *c) {
1171 int x1, y1, ocx, ocy, di, nx, ny;
1172 unsigned int dui;
1173 Monitor *m;
1174 Window dummy;
1175 XEvent ev;
1176
1177 ocx = nx = c->x;
1178 ocy = ny = c->y;
1179 m = &monitors[c->monitor];
1180 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1181 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1182 return;
1183 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1184 for(;;) {
1185 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1186 switch (ev.type) {
1187 case ButtonRelease:
1188 XUngrabPointer(dpy, CurrentTime);
1189 return;
1190 case ConfigureRequest:
1191 case Expose:
1192 case MapRequest:
1193 handler[ev.type](&ev);
1194 break;
1195 case MotionNotify:
1196 XSync(dpy, False);
1197 nx = ocx + (ev.xmotion.x - x1);
1198 ny = ocy + (ev.xmotion.y - y1);
1199 if(abs(m->wax - nx) < SNAP)
1200 nx = m->wax;
1201 else if(abs((m->wax + m->waw) - (nx + c->w + 2 * c->border)) < SNAP)
1202 nx = m->wax + m->waw - c->w - 2 * c->border;
1203 if(abs(m->way - ny) < SNAP)
1204 ny = m->way;
1205 else if(abs((m->way + m->wah) - (ny + c->h + 2 * c->border)) < SNAP)
1206 ny = m->way + m->wah - c->h - 2 * c->border;
1207 if((m->layout->arrange != floating) && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1208 togglefloating(NULL);
1209 if((m->layout->arrange == floating) || c->isfloating)
1210 resize(c, nx, ny, c->w, c->h, False);
1211 break;
1212 }
1213 }
1214 }
1215
1216 Client *
1217 nexttiled(Client *c, int monitor) {
1218 for(; c && (c->isfloating || !isvisible(c, monitor)); c = c->next);
1219 return c;
1220 }
1221
1222 void
1223 propertynotify(XEvent *e) {
1224 Client *c;
1225 Window trans;
1226 XPropertyEvent *ev = &e->xproperty;
1227
1228 if(ev->state == PropertyDelete)
1229 return; /* ignore */
1230 if((c = getclient(ev->window))) {
1231 switch (ev->atom) {
1232 default: break;
1233 case XA_WM_TRANSIENT_FOR:
1234 XGetTransientForHint(dpy, c->win, &trans);
1235 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1236 arrange();
1237 break;
1238 case XA_WM_NORMAL_HINTS:
1239 updatesizehints(c);
1240 break;
1241 case XA_WM_HINTS:
1242 updatewmhints(c);
1243 drawbar(&monitors[c->monitor]);
1244 break;
1245 }
1246 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1247 updatetitle(c);
1248 if(c == sel)
1249 drawbar(&monitors[c->monitor]);
1250 }
1251 }
1252 }
1253
1254 void
1255 quit(const char *arg) {
1256 readin = running = False;
1257 }
1258
1259 void
1260 reapply(const char *arg) {
1261 static Bool zerotags[LENGTH(tags)] = { 0 };
1262 Client *c;
1263
1264 for(c = clients; c; c = c->next) {
1265 memcpy(c->tags, zerotags, sizeof zerotags);
1266 applyrules(c);
1267 }
1268 arrange();
1269 }
1270
1271 void
1272 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1273 Monitor *m;
1274 XWindowChanges wc;
1275
1276 m = &monitors[c->monitor];
1277
1278 if(sizehints) {
1279 /* set minimum possible */
1280 if (w < 1)
1281 w = 1;
1282 if (h < 1)
1283 h = 1;
1284
1285 /* temporarily remove base dimensions */
1286 w -= c->basew;
1287 h -= c->baseh;
1288
1289 /* adjust for aspect limits */
1290 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1291 if (w * c->maxay > h * c->maxax)
1292 w = h * c->maxax / c->maxay;
1293 else if (w * c->minay < h * c->minax)
1294 h = w * c->minay / c->minax;
1295 }
1296
1297 /* adjust for increment value */
1298 if(c->incw)
1299 w -= w % c->incw;
1300 if(c->inch)
1301 h -= h % c->inch;
1302
1303 /* restore base dimensions */
1304 w += c->basew;
1305 h += c->baseh;
1306
1307 if(c->minw > 0 && w < c->minw)
1308 w = c->minw;
1309 if(c->minh > 0 && h < c->minh)
1310 h = c->minh;
1311 if(c->maxw > 0 && w > c->maxw)
1312 w = c->maxw;
1313 if(c->maxh > 0 && h > c->maxh)
1314 h = c->maxh;
1315 }
1316 if(w <= 0 || h <= 0)
1317 return;
1318 if(x > m->sw)
1319 x = m->sw - w - 2 * c->border;
1320 if(y > m->sh)
1321 y = m->sh - h - 2 * c->border;
1322 if(x + w + 2 * c->border < m->sx)
1323 x = m->sx;
1324 if(y + h + 2 * c->border < m->sy)
1325 y = m->sy;
1326 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1327 c->x = wc.x = x;
1328 c->y = wc.y = y;
1329 c->w = wc.width = w;
1330 c->h = wc.height = h;
1331 wc.border_width = c->border;
1332 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1333 configure(c);
1334 XSync(dpy, False);
1335 }
1336 }
1337
1338 void
1339 resizemouse(Client *c) {
1340 int ocx, ocy;
1341 int nw, nh;
1342 Monitor *m;
1343 XEvent ev;
1344
1345 ocx = c->x;
1346 ocy = c->y;
1347 m = &monitors[c->monitor];
1348 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1349 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1350 return;
1351 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1352 for(;;) {
1353 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1354 switch(ev.type) {
1355 case ButtonRelease:
1356 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1357 c->w + c->border - 1, c->h + c->border - 1);
1358 XUngrabPointer(dpy, CurrentTime);
1359 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1360 return;
1361 case ConfigureRequest:
1362 case Expose:
1363 case MapRequest:
1364 handler[ev.type](&ev);
1365 break;
1366 case MotionNotify:
1367 XSync(dpy, False);
1368 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1369 nw = 1;
1370 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1371 nh = 1;
1372 if((m->layout->arrange != floating) && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1373 togglefloating(NULL);
1374 if((m->layout->arrange == floating) || c->isfloating)
1375 resize(c, c->x, c->y, nw, nh, True);
1376 break;
1377 }
1378 }
1379 }
1380
1381 void
1382 restack(Monitor *m) {
1383 Client *c;
1384 XEvent ev;
1385 XWindowChanges wc;
1386
1387 drawbar(m);
1388 if(!sel)
1389 return;
1390 if(sel->isfloating || (m->layout->arrange == floating))
1391 XRaiseWindow(dpy, sel->win);
1392 if(m->layout->arrange != floating) {
1393 wc.stack_mode = Below;
1394 wc.sibling = m->barwin;
1395 if(!sel->isfloating) {
1396 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1397 wc.sibling = sel->win;
1398 }
1399 for(c = nexttiled(clients, m->id); c; c = nexttiled(c->next, m->id)) {
1400 if(c == sel)
1401 continue;
1402 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1403 wc.sibling = c->win;
1404 }
1405 }
1406 XSync(dpy, False);
1407 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1408 }
1409
1410 void
1411 run(void) {
1412 char *p;
1413 char buf[sizeof stext];
1414 fd_set rd;
1415 int r, xfd;
1416 unsigned int len, offset;
1417 XEvent ev;
1418
1419 /* main event loop, also reads status text from stdin */
1420 XSync(dpy, False);
1421 xfd = ConnectionNumber(dpy);
1422 readin = True;
1423 offset = 0;
1424 len = sizeof stext - 1;
1425 buf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1426 while(running) {
1427 FD_ZERO(&rd);
1428 if(readin)
1429 FD_SET(STDIN_FILENO, &rd);
1430 FD_SET(xfd, &rd);
1431 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1432 if(errno == EINTR)
1433 continue;
1434 eprint("select failed\n");
1435 }
1436 if(FD_ISSET(STDIN_FILENO, &rd)) {
1437 switch((r = read(STDIN_FILENO, buf + offset, len - offset))) {
1438 case -1:
1439 strncpy(stext, strerror(errno), len);
1440 readin = False;
1441 break;
1442 case 0:
1443 strncpy(stext, "EOF", 4);
1444 readin = False;
1445 break;
1446 default:
1447 for(p = buf + offset; r > 0; p++, r--, offset++)
1448 if(*p == '\n' || *p == '\0') {
1449 *p = '\0';
1450 strncpy(stext, buf, len);
1451 p += r - 1; /* p is buf + offset + r - 1 */
1452 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1453 offset = r;
1454 if(r)
1455 memmove(buf, p - r + 1, r);
1456 break;
1457 }
1458 break;
1459 }
1460 drawbar(&monitors[selmonitor]);
1461 }
1462 while(XPending(dpy)) {
1463 XNextEvent(dpy, &ev);
1464 if(handler[ev.type])
1465 (handler[ev.type])(&ev); /* call handler */
1466 }
1467 }
1468 }
1469
1470 void
1471 scan(void) {
1472 unsigned int i, num;
1473 Window *wins, d1, d2;
1474 XWindowAttributes wa;
1475
1476 wins = NULL;
1477 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1478 for(i = 0; i < num; i++) {
1479 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1480 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1481 continue;
1482 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1483 manage(wins[i], &wa);
1484 }
1485 for(i = 0; i < num; i++) { /* now the transients */
1486 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1487 continue;
1488 if(XGetTransientForHint(dpy, wins[i], &d1)
1489 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1490 manage(wins[i], &wa);
1491 }
1492 }
1493 if(wins)
1494 XFree(wins);
1495 }
1496
1497 void
1498 setclientstate(Client *c, long state) {
1499 long data[] = {state, None};
1500
1501 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1502 PropModeReplace, (unsigned char *)data, 2);
1503 }
1504
1505 void
1506 setlayout(const char *arg) {
1507 unsigned int i;
1508 Monitor *m = &monitors[monitorat()];
1509
1510 if(!arg) {
1511 m->layout++;
1512 if(m->layout == &layouts[LENGTH(layouts)])
1513 m->layout = &layouts[0];
1514 }
1515 else {
1516 for(i = 0; i < LENGTH(layouts); i++)
1517 if(!strcmp(arg, layouts[i].symbol))
1518 break;
1519 if(i == LENGTH(layouts))
1520 return;
1521 m->layout = &layouts[i];
1522 }
1523 if(sel)
1524 arrange();
1525 else
1526 drawbar(m);
1527 }
1528
1529 void
1530 setmwfact(const char *arg) {
1531 double delta;
1532
1533 Monitor *m = &monitors[monitorat()];
1534
1535 if(!domwfact)
1536 return;
1537 /* arg handling, manipulate mwfact */
1538 if(arg == NULL)
1539 m->mwfact = MWFACT;
1540 else if(sscanf(arg, "%lf", &delta) == 1) {
1541 if(arg[0] == '+' || arg[0] == '-')
1542 m->mwfact += delta;
1543 else
1544 m->mwfact = delta;
1545 if(m->mwfact < 0.1)
1546 m->mwfact = 0.1;
1547 else if(m->mwfact > 0.9)
1548 m->mwfact = 0.9;
1549 }
1550 arrange();
1551 }
1552
1553 void
1554 setup(void) {
1555 unsigned int i;
1556 Monitor *m;
1557 XSetWindowAttributes wa;
1558 XineramaScreenInfo *info = NULL;
1559
1560 /* init atoms */
1561 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1562 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1563 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1564 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1565 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1566 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1567
1568 /* init cursors */
1569 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1570 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1571 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1572
1573 // init screens/monitors first
1574 mcount = 1;
1575 if((isxinerama = XineramaIsActive(dpy)))
1576 info = XineramaQueryScreens(dpy, &mcount);
1577 monitors = emallocz(mcount * sizeof(Monitor));
1578
1579 screen = DefaultScreen(dpy);
1580 root = RootWindow(dpy, screen);
1581
1582 /* init appearance */
1583 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1584 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1585 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1586 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1587 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1588 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1589 initfont(FONT);
1590 dc.h = bh = dc.font.height + 2;
1591 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1592 dc.gc = XCreateGC(dpy, root, 0, 0);
1593 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1594 if(!dc.font.set)
1595 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1596
1597 for(blw = i = 0; i < LENGTH(layouts); i++) {
1598 i = textw(layouts[i].symbol);
1599 if(i > blw)
1600 blw = i;
1601 }
1602 for(i = 0; i < mcount; i++) {
1603 /* init geometry */
1604 m = &monitors[i];
1605 m->id = i;
1606
1607 if (mcount != 1 && isxinerama) {
1608 m->sx = info[i].x_org;
1609 m->sy = info[i].y_org;
1610 m->sw = info[i].width;
1611 m->sh = info[i].height;
1612 fprintf(stderr, "monitor[%d]: %d,%d,%d,%d\n", i, m->sx, m->sy, m->sw, m->sh);
1613 }
1614 else {
1615 m->sx = 0;
1616 m->sy = 0;
1617 m->sw = DisplayWidth(dpy, screen);
1618 m->sh = DisplayHeight(dpy, screen);
1619 }
1620
1621 m->seltags = emallocz(sizeof initags);
1622 m->prevtags = emallocz(sizeof initags);
1623
1624 memcpy(m->seltags, initags, sizeof initags);
1625 memcpy(m->prevtags, initags, sizeof initags);
1626
1627 /* init layouts */
1628 m->mwfact = MWFACT;
1629 m->layout = &layouts[0];
1630
1631 // TODO: bpos per screen?
1632 bpos = BARPOS;
1633 wa.override_redirect = 1;
1634 wa.background_pixmap = ParentRelative;
1635 wa.event_mask = ButtonPressMask | ExposureMask;
1636
1637 /* init bars */
1638 m->barwin = XCreateWindow(dpy, root, m->sx, m->sy, m->sw, bh, 0,
1639 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1640 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1641 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1642 updatebarpos(m);
1643 XMapRaised(dpy, m->barwin);
1644 strcpy(stext, "dwm-"VERSION);
1645
1646 /* EWMH support per monitor */
1647 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1648 PropModeReplace, (unsigned char *) netatom, NetLast);
1649
1650 /* select for events */
1651 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1652 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1653 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1654 XSelectInput(dpy, root, wa.event_mask);
1655
1656 drawbar(m);
1657 }
1658 if(info)
1659 XFree(info);
1660
1661 /* grab keys */
1662 grabkeys();
1663
1664 /* init tags */
1665 compileregs();
1666
1667 selmonitor = monitorat();
1668 fprintf(stderr, "selmonitor == %d\n", selmonitor);
1669 }
1670
1671 void
1672 spawn(const char *arg) {
1673 static char *shell = NULL;
1674
1675 if(!shell && !(shell = getenv("SHELL")))
1676 shell = "/bin/sh";
1677 if(!arg)
1678 return;
1679 /* The double-fork construct avoids zombie processes and keeps the code
1680 * clean from stupid signal handlers. */
1681 if(fork() == 0) {
1682 if(fork() == 0) {
1683 if(dpy)
1684 close(ConnectionNumber(dpy));
1685 setsid();
1686 execl(shell, shell, "-c", arg, (char *)NULL);
1687 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1688 perror(" failed");
1689 }
1690 exit(0);
1691 }
1692 wait(0);
1693 }
1694
1695 void
1696 tag(const char *arg) {
1697 unsigned int i;
1698
1699 if(!sel)
1700 return;
1701 for(i = 0; i < LENGTH(tags); i++)
1702 sel->tags[i] = (NULL == arg);
1703 sel->tags[idxoftag(arg)] = True;
1704 arrange();
1705 }
1706
1707 unsigned int
1708 textnw(const char *text, unsigned int len) {
1709 XRectangle r;
1710
1711 if(dc.font.set) {
1712 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1713 return r.width;
1714 }
1715 return XTextWidth(dc.font.xfont, text, len);
1716 }
1717
1718 unsigned int
1719 textw(const char *text) {
1720 return textnw(text, strlen(text)) + dc.font.height;
1721 }
1722
1723 void
1724 tile(Monitor *m) {
1725 unsigned int i, n, nx, ny, nw, nh, mw, th;
1726 Client *c, *mc;
1727
1728 domwfact = dozoom = True;
1729
1730 nx = ny = nw = 0; /* gcc stupidity requires this */
1731
1732 for(n = 0, c = nexttiled(clients, m->id); c; c = nexttiled(c->next, m->id))
1733 n++;
1734
1735 /* window geoms */
1736 mw = (n == 1) ? m->waw : m->mwfact * m->waw;
1737 th = (n > 1) ? m->wah / (n - 1) : 0;
1738 if(n > 1 && th < bh)
1739 th = m->wah;
1740
1741 for(i = 0, c = mc = nexttiled(clients, m->id); c; c = nexttiled(c->next, m->id)) {
1742 if(i == 0) { /* master */
1743 nx = m->wax;
1744 ny = m->way;
1745 nw = mw - 2 * c->border;
1746 nh = m->wah - 2 * c->border;
1747 }
1748 else { /* tile window */
1749 if(i == 1) {
1750 ny = m->way;
1751 nx += mc->w + 2 * mc->border;
1752 nw = m->waw - mw - 2 * c->border;
1753 }
1754 if(i + 1 == n) /* remainder */
1755 nh = (m->way + m->wah) - ny - 2 * c->border;
1756 else
1757 nh = th - 2 * c->border;
1758 }
1759 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1760 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1761 /* client doesn't accept size constraints */
1762 resize(c, nx, ny, nw, nh, False);
1763 if(n > 1 && th != m->wah)
1764 ny = c->y + c->h + 2 * c->border;
1765
1766 i++;
1767 }
1768 }
1769 void
1770 togglebar(const char *arg) {
1771 if(bpos == BarOff)
1772 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1773 else
1774 bpos = BarOff;
1775 updatebarpos(&monitors[monitorat()]);
1776 arrange();
1777 }
1778
1779 void
1780 togglefloating(const char *arg) {
1781 if(!sel)
1782 return;
1783 sel->isfloating = !sel->isfloating;
1784 if(sel->isfloating)
1785 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1786 arrange();
1787 }
1788
1789 void
1790 toggletag(const char *arg) {
1791 unsigned int i, j;
1792
1793 if(!sel)
1794 return;
1795 i = idxoftag(arg);
1796 sel->tags[i] = !sel->tags[i];
1797 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1798 if(j == LENGTH(tags))
1799 sel->tags[i] = True; /* at least one tag must be enabled */
1800 arrange();
1801 }
1802
1803 void
1804 toggleview(const char *arg) {
1805 unsigned int i, j;
1806
1807 Monitor *m = &monitors[monitorat()];
1808
1809 i = idxoftag(arg);
1810 m->seltags[i] = !m->seltags[i];
1811 for(j = 0; j < LENGTH(tags) && !m->seltags[j]; j++);
1812 if(j == LENGTH(tags))
1813 m->seltags[i] = True; /* at least one tag must be viewed */
1814 arrange();
1815 }
1816
1817 void
1818 unban(Client *c) {
1819 if(!c->isbanned)
1820 return;
1821 XMoveWindow(dpy, c->win, c->x, c->y);
1822 c->isbanned = False;
1823 }
1824
1825 void
1826 unmanage(Client *c) {
1827 XWindowChanges wc;
1828
1829 wc.border_width = c->oldborder;
1830 /* The server grab construct avoids race conditions. */
1831 XGrabServer(dpy);
1832 XSetErrorHandler(xerrordummy);
1833 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1834 detach(c);
1835 detachstack(c);
1836 if(sel == c)
1837 focus(NULL);
1838 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1839 setclientstate(c, WithdrawnState);
1840 free(c->tags);
1841 free(c);
1842 XSync(dpy, False);
1843 XSetErrorHandler(xerror);
1844 XUngrabServer(dpy);
1845 arrange();
1846 }
1847
1848 void
1849 unmapnotify(XEvent *e) {
1850 Client *c;
1851 XUnmapEvent *ev = &e->xunmap;
1852
1853 if((c = getclient(ev->window)))
1854 unmanage(c);
1855 }
1856
1857 void
1858 updatebarpos(Monitor *m) {
1859 XEvent ev;
1860
1861 m->wax = m->sx;
1862 m->way = m->sy;
1863 m->wah = m->sh;
1864 m->waw = m->sw;
1865 switch(bpos) {
1866 default:
1867 m->wah -= bh;
1868 m->way += bh;
1869 XMoveWindow(dpy, m->barwin, m->sx, m->sy);
1870 break;
1871 case BarBot:
1872 m->wah -= bh;
1873 XMoveWindow(dpy, m->barwin, m->sx, m->sy + m->wah);
1874 break;
1875 case BarOff:
1876 XMoveWindow(dpy, m->barwin, m->sx, m->sy - bh);
1877 break;
1878 }
1879 XSync(dpy, False);
1880 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1881 }
1882
1883 void
1884 updatesizehints(Client *c) {
1885 long msize;
1886 XSizeHints size;
1887
1888 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1889 size.flags = PSize;
1890 c->flags = size.flags;
1891 if(c->flags & PBaseSize) {
1892 c->basew = size.base_width;
1893 c->baseh = size.base_height;
1894 }
1895 else if(c->flags & PMinSize) {
1896 c->basew = size.min_width;
1897 c->baseh = size.min_height;
1898 }
1899 else
1900 c->basew = c->baseh = 0;
1901 if(c->flags & PResizeInc) {
1902 c->incw = size.width_inc;
1903 c->inch = size.height_inc;
1904 }
1905 else
1906 c->incw = c->inch = 0;
1907 if(c->flags & PMaxSize) {
1908 c->maxw = size.max_width;
1909 c->maxh = size.max_height;
1910 }
1911 else
1912 c->maxw = c->maxh = 0;
1913 if(c->flags & PMinSize) {
1914 c->minw = size.min_width;
1915 c->minh = size.min_height;
1916 }
1917 else if(c->flags & PBaseSize) {
1918 c->minw = size.base_width;
1919 c->minh = size.base_height;
1920 }
1921 else
1922 c->minw = c->minh = 0;
1923 if(c->flags & PAspect) {
1924 c->minax = size.min_aspect.x;
1925 c->maxax = size.max_aspect.x;
1926 c->minay = size.min_aspect.y;
1927 c->maxay = size.max_aspect.y;
1928 }
1929 else
1930 c->minax = c->maxax = c->minay = c->maxay = 0;
1931 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1932 && c->maxw == c->minw && c->maxh == c->minh);
1933 }
1934
1935 void
1936 updatetitle(Client *c) {
1937 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1938 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1939 }
1940
1941 void
1942 updatewmhints(Client *c) {
1943 XWMHints *wmh;
1944
1945 if((wmh = XGetWMHints(dpy, c->win))) {
1946 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1947 XFree(wmh);
1948 }
1949 }
1950
1951 /* There's no way to check accesses to destroyed windows, thus those cases are
1952 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1953 * default error handler, which may call exit. */
1954 int
1955 xerror(Display *dpy, XErrorEvent *ee) {
1956 if(ee->error_code == BadWindow
1957 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1958 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1959 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1960 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1961 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1962 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1963 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1964 return 0;
1965 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1966 ee->request_code, ee->error_code);
1967 return xerrorxlib(dpy, ee); /* may call exit */
1968 }
1969
1970 int
1971 xerrordummy(Display *dsply, XErrorEvent *ee) {
1972 return 0;
1973 }
1974
1975 /* Startup Error handler to check if another window manager
1976 * is already running. */
1977 int
1978 xerrorstart(Display *dsply, XErrorEvent *ee) {
1979 otherwm = True;
1980 return -1;
1981 }
1982
1983 void
1984 view(const char *arg) {
1985 unsigned int i;
1986 Bool tmp[LENGTH(tags)];
1987 Monitor *m = &monitors[monitorat()];
1988
1989 for(i = 0; i < LENGTH(tags); i++)
1990 tmp[i] = (NULL == arg);
1991 tmp[idxoftag(arg)] = True;
1992 if(memcmp(m->seltags, tmp, sizeof initags) != 0) {
1993 memcpy(m->prevtags, m->seltags, sizeof initags);
1994 memcpy(m->seltags, tmp, sizeof initags);
1995 arrange();
1996 }
1997 }
1998
1999 void
2000 viewprevtag(const char *arg) {
2001 static Bool tmp[LENGTH(tags)];
2002
2003 Monitor *m = &monitors[monitorat()];
2004
2005 memcpy(tmp, m->seltags, sizeof initags);
2006 memcpy(m->seltags, m->prevtags, sizeof initags);
2007 memcpy(m->prevtags, tmp, sizeof initags);
2008 arrange();
2009 }
2010
2011 void
2012 zoom(const char *arg) {
2013 Client *c = sel;
2014
2015 if(!sel || !dozoom || sel->isfloating)
2016 return;
2017 if(c == nexttiled(clients, c->monitor))
2018 if(!(c = nexttiled(c->next, c->monitor)))
2019 return;
2020 detach(c);
2021 attach(c);
2022 focus(c);
2023 arrange();
2024 }
2025
2026 void
2027 movetomonitor(const char *arg) {
2028 if (sel) {
2029 sel->monitor = arg ? atoi(arg) : (sel->monitor+1) % mcount;
2030
2031 memcpy(sel->tags, monitors[sel->monitor].seltags, sizeof initags);
2032 resize(sel, monitors[sel->monitor].wax, monitors[sel->monitor].way, sel->w, sel->h, True);
2033 arrange();
2034 }
2035 }
2036
2037 void
2038 selectmonitor(const char *arg) {
2039 Monitor *m = &monitors[arg ? atoi(arg) : (monitorat()+1) % mcount];
2040
2041 XWarpPointer(dpy, None, root, 0, 0, 0, 0, m->wax+m->waw/2, m->way+m->wah/2);
2042 focus(NULL);
2043 }
2044
2045
2046 int
2047 main(int argc, char *argv[]) {
2048 if(argc == 2 && !strcmp("-v", argv[1]))
2049 eprint("dwm-"VERSION", © 2006-2008 Anselm R. Garbe, Sander van Dijk, "
2050 "Jukka Salmi, Premysl Hruby, Szabolcs Nagy, Christof Musik\n");
2051 else if(argc != 1)
2052 eprint("usage: dwm [-v]\n");
2053
2054 setlocale(LC_CTYPE, "");
2055 if(!(dpy = XOpenDisplay(0)))
2056 eprint("dwm: cannot open display\n");
2057
2058 checkotherwm();
2059 setup();
2060 scan();
2061 run();
2062 cleanup();
2063
2064 XCloseDisplay(dpy);
2065 return 0;
2066 }