768464675001b1cbf67e156c2bae22227bf726bd
[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(Monitor *m);
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(Monitor *m) {
303 unsigned int i;
304 Client *c;
305
306 for(c = clients; c; c = c->next)
307 if(isvisible(c, c->monitor))
308 unban(c);
309 else
310 ban(c);
311
312 if(m)
313 m->layout->arrange(m);
314 else
315 for(i = 0; i < mcount; i++)
316 monitors[i].layout->arrange(&monitors[i]);
317 focus(NULL);
318 restack(m);
319 }
320
321 void
322 attach(Client *c) {
323 if(clients)
324 clients->prev = c;
325 c->next = clients;
326 clients = c;
327 }
328
329 void
330 attachstack(Client *c) {
331 c->snext = stack;
332 stack = c;
333 }
334
335 void
336 ban(Client *c) {
337 if(c->isbanned)
338 return;
339 XMoveWindow(dpy, c->win, c->x + 3 * c->monitor->sw, c->y);
340 c->isbanned = True;
341 }
342
343 void
344 buttonpress(XEvent *e) {
345 unsigned int i, x;
346 Client *c;
347 XButtonPressedEvent *ev = &e->xbutton;
348
349 Monitor *m = monitorat();
350
351 if(ev->window == m->barwin) {
352 x = 0;
353 for(i = 0; i < LENGTH(tags); i++) {
354 x += textw(tags[i]);
355 if(ev->x < x) {
356 if(ev->button == Button1) {
357 if(ev->state & MODKEY)
358 tag(tags[i]);
359 else
360 view(tags[i]);
361 }
362 else if(ev->button == Button3) {
363 if(ev->state & MODKEY)
364 toggletag(tags[i]);
365 else
366 toggleview(tags[i]);
367 }
368 return;
369 }
370 }
371 if((ev->x < x + blw) && ev->button == Button1)
372 setlayout(NULL);
373 }
374 else if((c = getclient(ev->window))) {
375 focus(c);
376 if(CLEANMASK(ev->state) != MODKEY)
377 return;
378 if(ev->button == Button1) {
379 restack(c->monitor);
380 movemouse(c);
381 }
382 else if(ev->button == Button2) {
383 if((floating != m->layout->arrange) && c->isfloating)
384 togglefloating(NULL);
385 else
386 zoom(NULL);
387 }
388 else if(ev->button == Button3 && !c->isfixed) {
389 restack(c->monitor);
390 resizemouse(c);
391 }
392 }
393 }
394
395 void
396 checkotherwm(void) {
397 otherwm = False;
398 XSetErrorHandler(xerrorstart);
399
400 /* this causes an error if some other window manager is running */
401 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
402 XSync(dpy, False);
403 if(otherwm)
404 eprint("dwm: another window manager is already running\n");
405 XSync(dpy, False);
406 XSetErrorHandler(NULL);
407 xerrorxlib = XSetErrorHandler(xerror);
408 XSync(dpy, False);
409 }
410
411 void
412 cleanup(void) {
413 unsigned int i;
414 close(STDIN_FILENO);
415 while(stack) {
416 unban(stack);
417 unmanage(stack);
418 }
419 if(dc.font.set)
420 XFreeFontSet(dpy, dc.font.set);
421 else
422 XFreeFont(dpy, dc.font.xfont);
423
424 XUngrabKey(dpy, AnyKey, AnyModifier, root);
425 XFreePixmap(dpy, dc.drawable);
426 XFreeGC(dpy, dc.gc);
427 XFreeCursor(dpy, cursor[CurNormal]);
428 XFreeCursor(dpy, cursor[CurResize]);
429 XFreeCursor(dpy, cursor[CurMove]);
430 for(i = 0; i < mcount; i++)
431 XDestroyWindow(dpy, monitors[i].barwin);
432 XSync(dpy, False);
433 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
434 }
435
436 void
437 compileregs(void) {
438 unsigned int i;
439 regex_t *reg;
440
441 if(regs)
442 return;
443 regs = emallocz(LENGTH(rules) * sizeof(Regs));
444 for(i = 0; i < LENGTH(rules); i++) {
445 if(rules[i].prop) {
446 reg = emallocz(sizeof(regex_t));
447 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
448 free(reg);
449 else
450 regs[i].propregex = reg;
451 }
452 if(rules[i].tags) {
453 reg = emallocz(sizeof(regex_t));
454 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
455 free(reg);
456 else
457 regs[i].tagregex = reg;
458 }
459 }
460 }
461
462 void
463 configure(Client *c) {
464 XConfigureEvent ce;
465
466 ce.type = ConfigureNotify;
467 ce.display = dpy;
468 ce.event = c->win;
469 ce.window = c->win;
470 ce.x = c->x;
471 ce.y = c->y;
472 ce.width = c->w;
473 ce.height = c->h;
474 ce.border_width = c->border;
475 ce.above = None;
476 ce.override_redirect = False;
477 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
478 }
479
480 void
481 configurenotify(XEvent *e) {
482 XConfigureEvent *ev = &e->xconfigure;
483 Monitor *m = selmonitor;
484
485 if(ev->window == root && (ev->width != m->sw || ev->height != m->sh)) {
486 /* TODO -- update Xinerama dimensions here */
487 m->sw = ev->width;
488 m->sh = ev->height;
489 XFreePixmap(dpy, dc.drawable);
490 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(root, screen), bh, DefaultDepth(dpy, screen));
491 XResizeWindow(dpy, m->barwin, m->sw, bh);
492 updatebarpos(m);
493 arrange(m);
494 }
495 }
496
497 void
498 configurerequest(XEvent *e) {
499 Client *c;
500 XConfigureRequestEvent *ev = &e->xconfigurerequest;
501 XWindowChanges wc;
502
503 if((c = getclient(ev->window))) {
504 Monitor *m = c->monitor;
505 if(ev->value_mask & CWBorderWidth)
506 c->border = ev->border_width;
507 if(c->isfixed || c->isfloating || (floating == m->layout->arrange)) {
508 if(ev->value_mask & CWX)
509 c->x = m->sx+ev->x;
510 if(ev->value_mask & CWY)
511 c->y = m->sy+ev->y;
512 if(ev->value_mask & CWWidth)
513 c->w = ev->width;
514 if(ev->value_mask & CWHeight)
515 c->h = ev->height;
516 if((c->x - m->sx + c->w) > m->sw && c->isfloating)
517 c->x = m->sx + (m->sw / 2 - c->w / 2); /* center in x direction */
518 if((c->y - m->sy + c->h) > m->sh && c->isfloating)
519 c->y = m->sy + (m->sh / 2 - c->h / 2); /* center in y direction */
520 if((ev->value_mask & (CWX | CWY))
521 && !(ev->value_mask & (CWWidth | CWHeight)))
522 configure(c);
523 if(isvisible(c, monitorat()))
524 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
525 }
526 else
527 configure(c);
528 }
529 else {
530 wc.x = ev->x;
531 wc.y = ev->y;
532 wc.width = ev->width;
533 wc.height = ev->height;
534 wc.border_width = ev->border_width;
535 wc.sibling = ev->above;
536 wc.stack_mode = ev->detail;
537 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
538 }
539 XSync(dpy, False);
540 }
541
542 void
543 destroynotify(XEvent *e) {
544 Client *c;
545 XDestroyWindowEvent *ev = &e->xdestroywindow;
546
547 if((c = getclient(ev->window)))
548 unmanage(c);
549 }
550
551 void
552 detach(Client *c) {
553 if(c->prev)
554 c->prev->next = c->next;
555 if(c->next)
556 c->next->prev = c->prev;
557 if(c == clients)
558 clients = c->next;
559 c->next = c->prev = NULL;
560 }
561
562 void
563 detachstack(Client *c) {
564 Client **tc;
565
566 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
567 *tc = c->snext;
568 }
569
570 void
571 drawbar(Monitor *m) {
572 int j, x;
573 Client *c;
574
575 dc.x = 0;
576 for(c = stack; c && !isvisible(c, m); c = c->snext);
577 for(j = 0; j < LENGTH(tags); j++) {
578 dc.w = textw(tags[j]);
579 if(m->seltags[j]) {
580 drawtext(m, tags[j], dc.sel, isurgent(m, j));
581 drawsquare(m, c && c->tags[j] && c->monitor == m,
582 isoccupied(m, j), isurgent(m, j), dc.sel);
583 }
584 else {
585 drawtext(m, tags[j], dc.norm, isurgent(m, j));
586 drawsquare(m, c && c->tags[j] && c->monitor == m,
587 isoccupied(m, j), isurgent(m, j), dc.norm);
588 }
589 dc.x += dc.w;
590 }
591 dc.w = blw;
592 drawtext(m, m->layout->symbol, dc.norm, False);
593 x = dc.x + dc.w;
594 if(m == selmonitor) {
595 dc.w = textw(stext);
596 dc.x = m->sw - dc.w;
597 if(dc.x < x) {
598 dc.x = x;
599 dc.w = m->sw - x;
600 }
601 drawtext(m, stext, dc.norm, False);
602 }
603 else
604 dc.x = m->sw;
605 if((dc.w = dc.x - x) > bh) {
606 dc.x = x;
607 if(c) {
608 drawtext(m, c->name, dc.sel, False);
609 drawsquare(m, False, c->isfloating, False, dc.sel);
610 }
611 else
612 drawtext(m, NULL, dc.norm, False);
613 }
614 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->sw, bh, 0, 0);
615 XSync(dpy, False);
616 }
617
618 void
619 drawsquare(Monitor *m, Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
620 int x;
621 XGCValues gcv;
622 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
623
624 gcv.foreground = col[invert ? ColBG : ColFG];
625 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
626 x = (dc.font.ascent + dc.font.descent + 2) / 4;
627 r.x = dc.x + 1;
628 r.y = dc.y + 1;
629 if(filled) {
630 r.width = r.height = x + 1;
631 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
632 }
633 else if(empty) {
634 r.width = r.height = x;
635 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
636 }
637 }
638
639 void
640 drawtext(Monitor *m, const char *text, unsigned long col[ColLast], Bool invert) {
641 int x, y, w, h;
642 static char buf[256];
643 unsigned int len, olen;
644 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
645
646 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
647 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
648 if(!text)
649 return;
650 w = 0;
651 olen = len = strlen(text);
652 if(len >= sizeof buf)
653 len = sizeof buf - 1;
654 memcpy(buf, text, len);
655 buf[len] = 0;
656 h = dc.font.ascent + dc.font.descent;
657 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
658 x = dc.x + (h / 2);
659 /* shorten text if necessary */
660 while(len && (w = textnw(buf, len)) > dc.w - h)
661 buf[--len] = 0;
662 if(len < olen) {
663 if(len > 1)
664 buf[len - 1] = '.';
665 if(len > 2)
666 buf[len - 2] = '.';
667 if(len > 3)
668 buf[len - 3] = '.';
669 }
670 if(w > dc.w)
671 return; /* too long */
672 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
673 if(dc.font.set)
674 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
675 else
676 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
677 }
678
679 void *
680 emallocz(unsigned int size) {
681 void *res = calloc(1, size);
682
683 if(!res)
684 eprint("fatal: could not malloc() %u bytes\n", size);
685 return res;
686 }
687
688 void
689 enternotify(XEvent *e) {
690 Client *c;
691 XCrossingEvent *ev = &e->xcrossing;
692
693 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior) {
694 if(!isxinerama || ev->window != root)
695 return;
696 }
697 if((c = getclient(ev->window)))
698 focus(c);
699 else {
700 selmonitor = monitorat();
701 fprintf(stderr, "updating selmonitor %d\n", selmonitor - monitors);
702 focus(NULL);
703 }
704 }
705
706 void
707 eprint(const char *errstr, ...) {
708 va_list ap;
709
710 va_start(ap, errstr);
711 vfprintf(stderr, errstr, ap);
712 va_end(ap);
713 exit(EXIT_FAILURE);
714 }
715
716 void
717 expose(XEvent *e) {
718 Monitor *m;
719 XExposeEvent *ev = &e->xexpose;
720
721 if(ev->count == 0 && (m = getmonitor(ev->window)))
722 drawbar(m);
723 }
724
725 void
726 floating(Monitor *m) { /* default floating layout */
727 Client *c;
728
729 domwfact = dozoom = False;
730 for(c = clients; c; c = c->next)
731 if(isvisible(c, m))
732 resize(c, c->x, c->y, c->w, c->h, True);
733 }
734
735 void
736 focus(Client *c) {
737 if(c)
738 selmonitor = c->monitor;
739 if(!c || (c && !isvisible(c, selmonitor)))
740 for(c = stack; c && !isvisible(c, c->monitor); c = c->snext);
741 if(sel && sel != c) {
742 grabbuttons(sel, False);
743 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
744 }
745 if(c) {
746 detachstack(c);
747 attachstack(c);
748 grabbuttons(c, True);
749 }
750 sel = c;
751 if(c) {
752 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
753 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
754 selmonitor = c->monitor;
755 }
756 else
757 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
758 drawbar(selmonitor);
759 }
760
761 void
762 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
763 XFocusChangeEvent *ev = &e->xfocus;
764
765 if(sel && ev->window != sel->win)
766 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
767 }
768
769 void
770 focusnext(const char *arg) {
771 Client *c;
772
773 if(!sel)
774 return;
775 for(c = sel->next; c && !isvisible(c, selmonitor); c = c->next);
776 if(!c)
777 for(c = clients; c && !isvisible(c, selmonitor); c = c->next);
778 if(c) {
779 focus(c);
780 restack(c->monitor);
781 }
782 }
783
784 void
785 focusprev(const char *arg) {
786 Client *c;
787
788 if(!sel)
789 return;
790 for(c = sel->prev; c && !isvisible(c, selmonitor); c = c->prev);
791 if(!c) {
792 for(c = clients; c && c->next; c = c->next);
793 for(; c && !isvisible(c, selmonitor); c = c->prev);
794 }
795 if(c) {
796 focus(c);
797 restack(c->monitor);
798 }
799 }
800
801 Client *
802 getclient(Window w) {
803 Client *c;
804
805 for(c = clients; c && c->win != w; c = c->next);
806 return c;
807 }
808
809 unsigned long
810 getcolor(const char *colstr) {
811 Colormap cmap = DefaultColormap(dpy, screen);
812 XColor color;
813
814 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
815 eprint("error, cannot allocate color '%s'\n", colstr);
816 return color.pixel;
817 }
818
819 Monitor *
820 getmonitor(Window barwin) {
821 unsigned int i;
822
823 for(i = 0; i < mcount; i++)
824 if(monitors[i].barwin == barwin)
825 return &monitors[i];
826 return NULL;
827 }
828
829 long
830 getstate(Window w) {
831 int format, status;
832 long result = -1;
833 unsigned char *p = NULL;
834 unsigned long n, extra;
835 Atom real;
836
837 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
838 &real, &format, &n, &extra, (unsigned char **)&p);
839 if(status != Success)
840 return -1;
841 if(n != 0)
842 result = *p;
843 XFree(p);
844 return result;
845 }
846
847 Bool
848 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
849 char **list = NULL;
850 int n;
851 XTextProperty name;
852
853 if(!text || size == 0)
854 return False;
855 text[0] = '\0';
856 XGetTextProperty(dpy, w, &name, atom);
857 if(!name.nitems)
858 return False;
859 if(name.encoding == XA_STRING)
860 strncpy(text, (char *)name.value, size - 1);
861 else {
862 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
863 && n > 0 && *list) {
864 strncpy(text, *list, size - 1);
865 XFreeStringList(list);
866 }
867 }
868 text[size - 1] = '\0';
869 XFree(name.value);
870 return True;
871 }
872
873 void
874 grabbuttons(Client *c, Bool focused) {
875 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
876
877 if(focused) {
878 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
879 GrabModeAsync, GrabModeSync, None, None);
880 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
881 GrabModeAsync, GrabModeSync, None, None);
882 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
883 GrabModeAsync, GrabModeSync, None, None);
884 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
885 GrabModeAsync, GrabModeSync, None, None);
886
887 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
888 GrabModeAsync, GrabModeSync, None, None);
889 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
890 GrabModeAsync, GrabModeSync, None, None);
891 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
892 GrabModeAsync, GrabModeSync, None, None);
893 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
894 GrabModeAsync, GrabModeSync, None, None);
895
896 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
897 GrabModeAsync, GrabModeSync, None, None);
898 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
899 GrabModeAsync, GrabModeSync, None, None);
900 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
901 GrabModeAsync, GrabModeSync, None, None);
902 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
903 GrabModeAsync, GrabModeSync, None, None);
904 }
905 else
906 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
907 GrabModeAsync, GrabModeSync, None, None);
908 }
909
910 void
911 grabkeys(void) {
912 unsigned int i, j;
913 KeyCode code;
914 XModifierKeymap *modmap;
915
916 /* init modifier map */
917 modmap = XGetModifierMapping(dpy);
918 for(i = 0; i < 8; i++)
919 for(j = 0; j < modmap->max_keypermod; j++) {
920 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
921 numlockmask = (1 << i);
922 }
923 XFreeModifiermap(modmap);
924
925 XUngrabKey(dpy, AnyKey, AnyModifier, root);
926 for(i = 0; i < LENGTH(keys); i++) {
927 code = XKeysymToKeycode(dpy, keys[i].keysym);
928 XGrabKey(dpy, code, keys[i].mod, root, True,
929 GrabModeAsync, GrabModeAsync);
930 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
931 GrabModeAsync, GrabModeAsync);
932 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
933 GrabModeAsync, GrabModeAsync);
934 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
935 GrabModeAsync, GrabModeAsync);
936 }
937 }
938
939 unsigned int
940 idxoftag(const char *tag) {
941 unsigned int i;
942
943 for(i = 0; (i < LENGTH(tags)) && (tags[i] != tag); i++);
944 return (i < LENGTH(tags)) ? i : 0;
945 }
946
947 void
948 initfont(const char *fontstr) {
949 char *def, **missing;
950 int i, n;
951
952 missing = NULL;
953 if(dc.font.set)
954 XFreeFontSet(dpy, dc.font.set);
955 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
956 if(missing) {
957 while(n--)
958 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
959 XFreeStringList(missing);
960 }
961 if(dc.font.set) {
962 XFontSetExtents *font_extents;
963 XFontStruct **xfonts;
964 char **font_names;
965 dc.font.ascent = dc.font.descent = 0;
966 font_extents = XExtentsOfFontSet(dc.font.set);
967 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
968 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
969 if(dc.font.ascent < (*xfonts)->ascent)
970 dc.font.ascent = (*xfonts)->ascent;
971 if(dc.font.descent < (*xfonts)->descent)
972 dc.font.descent = (*xfonts)->descent;
973 xfonts++;
974 }
975 }
976 else {
977 if(dc.font.xfont)
978 XFreeFont(dpy, dc.font.xfont);
979 dc.font.xfont = NULL;
980 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
981 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
982 eprint("error, cannot load font: '%s'\n", fontstr);
983 dc.font.ascent = dc.font.xfont->ascent;
984 dc.font.descent = dc.font.xfont->descent;
985 }
986 dc.font.height = dc.font.ascent + dc.font.descent;
987 }
988
989 Bool
990 isoccupied(Monitor *monitor, unsigned int t) {
991 Client *c;
992
993 for(c = clients; c; c = c->next)
994 if(c->tags[t] && c->monitor == monitor)
995 return True;
996 return False;
997 }
998
999 Bool
1000 isprotodel(Client *c) {
1001 int i, n;
1002 Atom *protocols;
1003 Bool ret = False;
1004
1005 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1006 for(i = 0; !ret && i < n; i++)
1007 if(protocols[i] == wmatom[WMDelete])
1008 ret = True;
1009 XFree(protocols);
1010 }
1011 return ret;
1012 }
1013
1014 Bool
1015 isurgent(Monitor *monitor, unsigned int t) {
1016 Client *c;
1017
1018 for(c = clients; c; c = c->next)
1019 if(c->monitor == monitor && c->isurgent && c->tags[t])
1020 return True;
1021 return False;
1022 }
1023
1024 Bool
1025 isvisible(Client *c, Monitor *m) {
1026 unsigned int i;
1027
1028 if(c->monitor != m)
1029 return False;
1030 for(i = 0; i < LENGTH(tags); i++)
1031 if(c->tags[i] && c->monitor->seltags[i])
1032 return True;
1033 return False;
1034 }
1035
1036 void
1037 keypress(XEvent *e) {
1038 unsigned int i;
1039 KeySym keysym;
1040 XKeyEvent *ev;
1041
1042 ev = &e->xkey;
1043 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1044 for(i = 0; i < LENGTH(keys); i++)
1045 if(keysym == keys[i].keysym
1046 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1047 {
1048 if(keys[i].func)
1049 keys[i].func(keys[i].arg);
1050 }
1051 }
1052
1053 void
1054 killclient(const char *arg) {
1055 XEvent ev;
1056
1057 if(!sel)
1058 return;
1059 if(isprotodel(sel)) {
1060 ev.type = ClientMessage;
1061 ev.xclient.window = sel->win;
1062 ev.xclient.message_type = wmatom[WMProtocols];
1063 ev.xclient.format = 32;
1064 ev.xclient.data.l[0] = wmatom[WMDelete];
1065 ev.xclient.data.l[1] = CurrentTime;
1066 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1067 }
1068 else
1069 XKillClient(dpy, sel->win);
1070 }
1071
1072 void
1073 manage(Window w, XWindowAttributes *wa) {
1074 Client *c, *t = NULL;
1075 Monitor *m;
1076 Status rettrans;
1077 Window trans;
1078 XWindowChanges wc;
1079
1080 c = emallocz(sizeof(Client));
1081 c->tags = emallocz(sizeof initags);
1082 c->win = w;
1083
1084 applyrules(c);
1085
1086 m = c->monitor;
1087
1088 c->x = wa->x + m->sx;
1089 c->y = wa->y + m->sy;
1090 c->w = wa->width;
1091 c->h = wa->height;
1092 c->oldborder = wa->border_width;
1093
1094 if(c->w == m->sw && c->h == m->sh) {
1095 c->x = m->sx;
1096 c->y = m->sy;
1097 c->border = wa->border_width;
1098 }
1099 else {
1100 if(c->x + c->w + 2 * c->border > m->wax + m->waw)
1101 c->x = m->wax + m->waw - c->w - 2 * c->border;
1102 if(c->y + c->h + 2 * c->border > m->way + m->wah)
1103 c->y = m->way + m->wah - c->h - 2 * c->border;
1104 if(c->x < m->wax)
1105 c->x = m->wax;
1106 if(c->y < m->way)
1107 c->y = m->way;
1108 c->border = BORDERPX;
1109 }
1110 wc.border_width = c->border;
1111 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1112 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1113 configure(c); /* propagates border_width, if size doesn't change */
1114 updatesizehints(c);
1115 XSelectInput(dpy, w, EnterWindowMask | FocusChangeMask | PropertyChangeMask | StructureNotifyMask);
1116 grabbuttons(c, False);
1117 updatetitle(c);
1118 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1119 for(t = clients; t && t->win != trans; t = t->next);
1120 if(t)
1121 memcpy(c->tags, t->tags, sizeof initags);
1122 if(!c->isfloating)
1123 c->isfloating = (rettrans == Success) || c->isfixed;
1124 attach(c);
1125 attachstack(c);
1126 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1127 ban(c);
1128 XMapWindow(dpy, c->win);
1129 setclientstate(c, NormalState);
1130 arrange(m);
1131 }
1132
1133 void
1134 mappingnotify(XEvent *e) {
1135 XMappingEvent *ev = &e->xmapping;
1136
1137 XRefreshKeyboardMapping(ev);
1138 if(ev->request == MappingKeyboard)
1139 grabkeys();
1140 }
1141
1142 void
1143 maprequest(XEvent *e) {
1144 static XWindowAttributes wa;
1145 XMapRequestEvent *ev = &e->xmaprequest;
1146
1147 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1148 return;
1149 if(wa.override_redirect)
1150 return;
1151 if(!getclient(ev->window))
1152 manage(ev->window, &wa);
1153 }
1154
1155 Monitor *
1156 monitorat() {
1157 int i, x, y;
1158 Window win;
1159 unsigned int mask;
1160
1161 XQueryPointer(dpy, root, &win, &win, &x, &y, &i, &i, &mask);
1162 for(i = 0; i < mcount; i++) {
1163 if((x >= monitors[i].sx && x < monitors[i].sx + monitors[i].sw)
1164 && (y >= monitors[i].sy && y < monitors[i].sy + monitors[i].sh)) {
1165 return &monitors[i];
1166 }
1167 }
1168 return NULL;
1169 }
1170
1171 void
1172 movemouse(Client *c) {
1173 int x1, y1, ocx, ocy, di, nx, ny;
1174 unsigned int dui;
1175 Monitor *m;
1176 Window dummy;
1177 XEvent ev;
1178
1179 ocx = nx = c->x;
1180 ocy = ny = c->y;
1181 m = c->monitor;
1182 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1183 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1184 return;
1185 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1186 for(;;) {
1187 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1188 switch (ev.type) {
1189 case ButtonRelease:
1190 XUngrabPointer(dpy, CurrentTime);
1191 return;
1192 case ConfigureRequest:
1193 case Expose:
1194 case MapRequest:
1195 handler[ev.type](&ev);
1196 break;
1197 case MotionNotify:
1198 XSync(dpy, False);
1199 nx = ocx + (ev.xmotion.x - x1);
1200 ny = ocy + (ev.xmotion.y - y1);
1201 if(abs(m->wax - nx) < SNAP)
1202 nx = m->wax;
1203 else if(abs((m->wax + m->waw) - (nx + c->w + 2 * c->border)) < SNAP)
1204 nx = m->wax + m->waw - c->w - 2 * c->border;
1205 if(abs(m->way - ny) < SNAP)
1206 ny = m->way;
1207 else if(abs((m->way + m->wah) - (ny + c->h + 2 * c->border)) < SNAP)
1208 ny = m->way + m->wah - c->h - 2 * c->border;
1209 if(!c->isfloating && (m->layout->arrange != floating) && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1210 togglefloating(NULL);
1211 if((m->layout->arrange == floating) || c->isfloating)
1212 resize(c, nx, ny, c->w, c->h, False);
1213 break;
1214 }
1215 }
1216 }
1217
1218 Client *
1219 nexttiled(Client *c, Monitor *monitor) {
1220 for(; c && (c->isfloating || !isvisible(c, monitor)); c = c->next);
1221 return c;
1222 }
1223
1224 void
1225 propertynotify(XEvent *e) {
1226 Client *c;
1227 Window trans;
1228 XPropertyEvent *ev = &e->xproperty;
1229
1230 if(ev->state == PropertyDelete)
1231 return; /* ignore */
1232 if((c = getclient(ev->window))) {
1233 switch (ev->atom) {
1234 default: break;
1235 case XA_WM_TRANSIENT_FOR:
1236 XGetTransientForHint(dpy, c->win, &trans);
1237 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1238 arrange(c->monitor);
1239 break;
1240 case XA_WM_NORMAL_HINTS:
1241 updatesizehints(c);
1242 break;
1243 case XA_WM_HINTS:
1244 updatewmhints(c);
1245 drawbar(c->monitor);
1246 break;
1247 }
1248 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1249 updatetitle(c);
1250 if(c == sel)
1251 drawbar(c->monitor);
1252 }
1253 }
1254 }
1255
1256 void
1257 quit(const char *arg) {
1258 readin = running = False;
1259 }
1260
1261 void
1262 reapply(const char *arg) {
1263 static Bool zerotags[LENGTH(tags)] = { 0 };
1264 Client *c;
1265
1266 for(c = clients; c; c = c->next) {
1267 memcpy(c->tags, zerotags, sizeof zerotags);
1268 applyrules(c);
1269 }
1270 arrange(NULL);
1271 }
1272
1273 void
1274 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1275 Monitor *m;
1276 XWindowChanges wc;
1277
1278 m = c->monitor;
1279 if(sizehints) {
1280 /* set minimum possible */
1281 if (w < 1)
1282 w = 1;
1283 if (h < 1)
1284 h = 1;
1285
1286 /* temporarily remove base dimensions */
1287 w -= c->basew;
1288 h -= c->baseh;
1289
1290 /* adjust for aspect limits */
1291 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1292 if (w * c->maxay > h * c->maxax)
1293 w = h * c->maxax / c->maxay;
1294 else if (w * c->minay < h * c->minax)
1295 h = w * c->minay / c->minax;
1296 }
1297
1298 /* adjust for increment value */
1299 if(c->incw)
1300 w -= w % c->incw;
1301 if(c->inch)
1302 h -= h % c->inch;
1303
1304 /* restore base dimensions */
1305 w += c->basew;
1306 h += c->baseh;
1307
1308 if(c->minw > 0 && w < c->minw)
1309 w = c->minw;
1310 if(c->minh > 0 && h < c->minh)
1311 h = c->minh;
1312 if(c->maxw > 0 && w > c->maxw)
1313 w = c->maxw;
1314 if(c->maxh > 0 && h > c->maxh)
1315 h = c->maxh;
1316 }
1317 if(w <= 0 || h <= 0)
1318 return;
1319 if(x > m->sw)
1320 x = m->sw - w - 2 * c->border;
1321 if(y > m->sh)
1322 y = m->sh - h - 2 * c->border;
1323 if(x + w + 2 * c->border < m->sx)
1324 x = m->sx;
1325 if(y + h + 2 * c->border < m->sy)
1326 y = m->sy;
1327 fprintf(stderr, "resize %d %d %d %d (%d %d %d %d)\n", x, y , w, h, m->sx, m->sy, m->sw, m->sh);
1328 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1329 c->x = wc.x = x;
1330 c->y = wc.y = y;
1331 c->w = wc.width = w;
1332 c->h = wc.height = h;
1333 wc.border_width = c->border;
1334 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1335 configure(c);
1336 XSync(dpy, False);
1337 }
1338 }
1339
1340 void
1341 resizemouse(Client *c) {
1342 int ocx, ocy;
1343 int nw, nh;
1344 Monitor *m;
1345 XEvent ev;
1346
1347 ocx = c->x;
1348 ocy = c->y;
1349 m = c->monitor;
1350 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1351 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1352 return;
1353 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1354 for(;;) {
1355 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1356 switch(ev.type) {
1357 case ButtonRelease:
1358 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1359 c->w + c->border - 1, c->h + c->border - 1);
1360 XUngrabPointer(dpy, CurrentTime);
1361 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1362 return;
1363 case ConfigureRequest:
1364 case Expose:
1365 case MapRequest:
1366 handler[ev.type](&ev);
1367 break;
1368 case MotionNotify:
1369 XSync(dpy, False);
1370 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1371 nw = 1;
1372 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1373 nh = 1;
1374 if(!c->isfloating && (m->layout->arrange != floating) && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1375 togglefloating(NULL);
1376 if((m->layout->arrange == floating) || c->isfloating)
1377 resize(c, c->x, c->y, nw, nh, True);
1378 break;
1379 }
1380 }
1381 }
1382
1383 void
1384 restack(Monitor *m) {
1385 Client *c;
1386 XEvent ev;
1387 XWindowChanges wc;
1388
1389 drawbar(m);
1390 if(!sel)
1391 return;
1392 if(sel->isfloating || (m->layout->arrange == floating))
1393 XRaiseWindow(dpy, sel->win);
1394 if(m->layout->arrange != floating) {
1395 wc.stack_mode = Below;
1396 wc.sibling = m->barwin;
1397 if(!sel->isfloating) {
1398 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1399 wc.sibling = sel->win;
1400 }
1401 for(c = nexttiled(clients, m); c; c = nexttiled(c->next, m)) {
1402 if(c == sel)
1403 continue;
1404 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1405 wc.sibling = c->win;
1406 }
1407 }
1408 XSync(dpy, False);
1409 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1410 }
1411
1412 void
1413 run(void) {
1414 char *p;
1415 char buf[sizeof stext];
1416 fd_set rd;
1417 int r, xfd;
1418 unsigned int len, offset;
1419 XEvent ev;
1420
1421 /* main event loop, also reads status text from stdin */
1422 XSync(dpy, False);
1423 xfd = ConnectionNumber(dpy);
1424 readin = True;
1425 offset = 0;
1426 len = sizeof stext - 1;
1427 buf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1428 while(running) {
1429 FD_ZERO(&rd);
1430 if(readin)
1431 FD_SET(STDIN_FILENO, &rd);
1432 FD_SET(xfd, &rd);
1433 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1434 if(errno == EINTR)
1435 continue;
1436 eprint("select failed\n");
1437 }
1438 if(FD_ISSET(STDIN_FILENO, &rd)) {
1439 switch((r = read(STDIN_FILENO, buf + offset, len - offset))) {
1440 case -1:
1441 strncpy(stext, strerror(errno), len);
1442 readin = False;
1443 break;
1444 case 0:
1445 strncpy(stext, "EOF", 4);
1446 readin = False;
1447 break;
1448 default:
1449 for(p = buf + offset; r > 0; p++, r--, offset++)
1450 if(*p == '\n' || *p == '\0') {
1451 *p = '\0';
1452 strncpy(stext, buf, len);
1453 p += r - 1; /* p is buf + offset + r - 1 */
1454 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1455 offset = r;
1456 if(r)
1457 memmove(buf, p - r + 1, r);
1458 break;
1459 }
1460 break;
1461 }
1462 drawbar(selmonitor);
1463 }
1464 while(XPending(dpy)) {
1465 XNextEvent(dpy, &ev);
1466 if(handler[ev.type])
1467 (handler[ev.type])(&ev); /* call handler */
1468 }
1469 }
1470 }
1471
1472 void
1473 scan(void) {
1474 unsigned int i, num;
1475 Window *wins, d1, d2;
1476 XWindowAttributes wa;
1477
1478 wins = NULL;
1479 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1480 for(i = 0; i < num; i++) {
1481 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1482 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1483 continue;
1484 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1485 manage(wins[i], &wa);
1486 }
1487 for(i = 0; i < num; i++) { /* now the transients */
1488 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1489 continue;
1490 if(XGetTransientForHint(dpy, wins[i], &d1)
1491 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1492 manage(wins[i], &wa);
1493 }
1494 }
1495 if(wins)
1496 XFree(wins);
1497 }
1498
1499 void
1500 setclientstate(Client *c, long state) {
1501 long data[] = {state, None};
1502
1503 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1504 PropModeReplace, (unsigned char *)data, 2);
1505 }
1506
1507 void
1508 setlayout(const char *arg) {
1509 unsigned int i;
1510 Monitor *m = monitorat();
1511
1512 if(!arg) {
1513 m->layout++;
1514 if(m->layout == &layouts[LENGTH(layouts)])
1515 m->layout = &layouts[0];
1516 }
1517 else {
1518 for(i = 0; i < LENGTH(layouts); i++)
1519 if(!strcmp(arg, layouts[i].symbol))
1520 break;
1521 if(i == LENGTH(layouts))
1522 return;
1523 m->layout = &layouts[i];
1524 }
1525 if(sel)
1526 arrange(m);
1527 else
1528 drawbar(m);
1529 }
1530
1531 void
1532 setmwfact(const char *arg) {
1533 double delta;
1534
1535 Monitor *m = monitorat();
1536
1537 if(!domwfact)
1538 return;
1539 /* arg handling, manipulate mwfact */
1540 if(arg == NULL)
1541 m->mwfact = MWFACT;
1542 else if(sscanf(arg, "%lf", &delta) == 1) {
1543 if(arg[0] == '+' || arg[0] == '-')
1544 m->mwfact += delta;
1545 else
1546 m->mwfact = delta;
1547 if(m->mwfact < 0.1)
1548 m->mwfact = 0.1;
1549 else if(m->mwfact > 0.9)
1550 m->mwfact = 0.9;
1551 }
1552 arrange(m);
1553 }
1554
1555 void
1556 setup(void) {
1557 unsigned int i;
1558 Monitor *m;
1559 XSetWindowAttributes wa;
1560 XineramaScreenInfo *info = NULL;
1561
1562 /* init atoms */
1563 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1564 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1565 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1566 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1567 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1568 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1569
1570 /* init cursors */
1571 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1572 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1573 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1574
1575 // init screens/monitors first
1576 if((isxinerama = XineramaIsActive(dpy)))
1577 info = XineramaQueryScreens(dpy, &mcount);
1578 selmonitor = monitors = emallocz(mcount * sizeof(Monitor));
1579
1580 screen = DefaultScreen(dpy);
1581 root = RootWindow(dpy, screen);
1582
1583 /* init appearance */
1584 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1585 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1586 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1587 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1588 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1589 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1590 initfont(FONT);
1591 dc.h = bh = dc.font.height + 2;
1592 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1593 dc.gc = XCreateGC(dpy, root, 0, 0);
1594 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1595 if(!dc.font.set)
1596 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1597
1598 for(blw = i = 0; i < LENGTH(layouts); i++) {
1599 i = textw(layouts[i].symbol);
1600 if(i > blw)
1601 blw = i;
1602 }
1603 for(i = 0; i < mcount; i++) {
1604 /* init geometry */
1605 m = &monitors[i];
1606 m->id = i;
1607
1608 if(mcount != 1 && isxinerama) {
1609 m->sx = info[i].x_org;
1610 m->sy = info[i].y_org;
1611 m->sw = info[i].width;
1612 m->sh = info[i].height;
1613 fprintf(stderr, "monitor[%d]: %d,%d,%d,%d\n", i, m->sx, m->sy, m->sw, m->sh);
1614 }
1615 else {
1616 m->sx = 0;
1617 m->sy = 0;
1618 m->sw = DisplayWidth(dpy, screen);
1619 m->sh = DisplayHeight(dpy, screen);
1620 }
1621
1622 m->seltags = emallocz(sizeof initags);
1623 m->prevtags = emallocz(sizeof initags);
1624
1625 memcpy(m->seltags, initags, sizeof initags);
1626 memcpy(m->prevtags, initags, sizeof initags);
1627
1628 /* init layouts */
1629 m->mwfact = MWFACT;
1630 m->layout = &layouts[0];
1631
1632 // TODO: bpos per screen?
1633 bpos = BARPOS;
1634 wa.override_redirect = 1;
1635 wa.background_pixmap = ParentRelative;
1636 wa.event_mask = ButtonPressMask | ExposureMask;
1637
1638 /* init bars */
1639 m->barwin = XCreateWindow(dpy, root, m->sx, m->sy, m->sw, bh, 0,
1640 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1641 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1642 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1643 updatebarpos(m);
1644 XMapRaised(dpy, m->barwin);
1645 strcpy(stext, "dwm-"VERSION);
1646
1647 /* EWMH support per monitor */
1648 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1649 PropModeReplace, (unsigned char *) netatom, NetLast);
1650
1651 /* select for events */
1652 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1653 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1654 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1655 XSelectInput(dpy, root, wa.event_mask);
1656
1657 drawbar(m);
1658 }
1659 if(info)
1660 XFree(info);
1661
1662 /* grab keys */
1663 grabkeys();
1664
1665 /* init tags */
1666 compileregs();
1667
1668 selmonitor = monitorat();
1669 fprintf(stderr, "selmonitor == %d\n", selmonitor - monitors);
1670 }
1671
1672 void
1673 spawn(const char *arg) {
1674 static char *shell = NULL;
1675
1676 if(!shell && !(shell = getenv("SHELL")))
1677 shell = "/bin/sh";
1678 if(!arg)
1679 return;
1680 /* The double-fork construct avoids zombie processes and keeps the code
1681 * clean from stupid signal handlers. */
1682 if(fork() == 0) {
1683 if(fork() == 0) {
1684 if(dpy)
1685 close(ConnectionNumber(dpy));
1686 setsid();
1687 execl(shell, shell, "-c", arg, (char *)NULL);
1688 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1689 perror(" failed");
1690 }
1691 exit(0);
1692 }
1693 wait(0);
1694 }
1695
1696 void
1697 tag(const char *arg) {
1698 unsigned int i;
1699
1700 if(!sel)
1701 return;
1702 for(i = 0; i < LENGTH(tags); i++)
1703 sel->tags[i] = (NULL == arg);
1704 sel->tags[idxoftag(arg)] = True;
1705 arrange(sel->monitor);
1706 }
1707
1708 unsigned int
1709 textnw(const char *text, unsigned int len) {
1710 XRectangle r;
1711
1712 if(dc.font.set) {
1713 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1714 return r.width;
1715 }
1716 return XTextWidth(dc.font.xfont, text, len);
1717 }
1718
1719 unsigned int
1720 textw(const char *text) {
1721 return textnw(text, strlen(text)) + dc.font.height;
1722 }
1723
1724 void
1725 tile(Monitor *m) {
1726 unsigned int i, n, nx, ny, nw, nh, mw, th;
1727 Client *c, *mc;
1728
1729 domwfact = dozoom = True;
1730 nx = m->wax;
1731 ny = m->way;
1732 nw = 0;
1733 for(n = 0, c = nexttiled(clients, m); c; c = nexttiled(c->next, m))
1734 n++;
1735
1736 /* window geoms */
1737 mw = (n == 1) ? m->waw : m->mwfact * m->waw;
1738 th = (n > 1) ? m->wah / (n - 1) : 0;
1739 if(n > 1 && th < bh)
1740 th = m->wah;
1741
1742 for(i = 0, c = mc = nexttiled(clients, m); c; c = nexttiled(c->next, m)) {
1743 if(i == 0) { /* master */
1744 nx = m->wax;
1745 ny = m->way;
1746 nw = mw - 2 * c->border;
1747 nh = m->wah - 2 * c->border;
1748 }
1749 else { /* tile window */
1750 if(i == 1) {
1751 ny = m->way;
1752 nx += mc->w + 2 * mc->border;
1753 nw = m->waw - mw - 2 * c->border;
1754 }
1755 if(i + 1 == n) /* remainder */
1756 nh = (m->way + m->wah) - ny - 2 * c->border;
1757 else
1758 nh = th - 2 * c->border;
1759 }
1760 fprintf(stderr, "tile %d %d %d %d\n", nx, ny, nw, nh);
1761 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1762 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1763 /* client doesn't accept size constraints */
1764 resize(c, nx, ny, nw, nh, False);
1765 if(n > 1 && th != m->wah)
1766 ny = c->y + c->h + 2 * c->border;
1767 i++;
1768 }
1769 }
1770
1771 void
1772 togglebar(const char *arg) {
1773 if(bpos == BarOff)
1774 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1775 else
1776 bpos = BarOff;
1777 updatebarpos(monitorat());
1778 arrange(monitorat());
1779 }
1780
1781 void
1782 togglefloating(const char *arg) {
1783 if(!sel)
1784 return;
1785 sel->isfloating = !sel->isfloating;
1786 if(sel->isfloating)
1787 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1788 arrange(sel->monitor);
1789 }
1790
1791 void
1792 toggletag(const char *arg) {
1793 unsigned int i, j;
1794
1795 if(!sel)
1796 return;
1797 i = idxoftag(arg);
1798 sel->tags[i] = !sel->tags[i];
1799 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1800 if(j == LENGTH(tags))
1801 sel->tags[i] = True; /* at least one tag must be enabled */
1802 arrange(sel->monitor);
1803 }
1804
1805 void
1806 toggleview(const char *arg) {
1807 unsigned int i, j;
1808 Monitor *m = monitorat();
1809
1810 i = idxoftag(arg);
1811 m->seltags[i] = !m->seltags[i];
1812 for(j = 0; j < LENGTH(tags) && !m->seltags[j]; j++);
1813 if(j == LENGTH(tags))
1814 m->seltags[i] = True; /* at least one tag must be viewed */
1815 arrange(m);
1816 }
1817
1818 void
1819 unban(Client *c) {
1820 if(!c->isbanned)
1821 return;
1822 XMoveWindow(dpy, c->win, c->x, c->y);
1823 c->isbanned = False;
1824 }
1825
1826 void
1827 unmanage(Client *c) {
1828 Monitor *m = c->monitor;
1829 XWindowChanges wc;
1830
1831 wc.border_width = c->oldborder;
1832 /* The server grab construct avoids race conditions. */
1833 XGrabServer(dpy);
1834 XSetErrorHandler(xerrordummy);
1835 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1836 detach(c);
1837 detachstack(c);
1838 if(sel == c)
1839 focus(NULL);
1840 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1841 setclientstate(c, WithdrawnState);
1842 free(c->tags);
1843 free(c);
1844 XSync(dpy, False);
1845 XSetErrorHandler(xerror);
1846 XUngrabServer(dpy);
1847 arrange(m);
1848 }
1849
1850 void
1851 unmapnotify(XEvent *e) {
1852 Client *c;
1853 XUnmapEvent *ev = &e->xunmap;
1854
1855 if((c = getclient(ev->window)))
1856 unmanage(c);
1857 }
1858
1859 void
1860 updatebarpos(Monitor *m) {
1861 XEvent ev;
1862
1863 m->wax = m->sx;
1864 m->way = m->sy;
1865 m->wah = m->sh;
1866 m->waw = m->sw;
1867 switch(bpos) {
1868 default:
1869 m->wah -= bh;
1870 m->way += bh;
1871 XMoveWindow(dpy, m->barwin, m->sx, m->sy);
1872 break;
1873 case BarBot:
1874 m->wah -= bh;
1875 XMoveWindow(dpy, m->barwin, m->sx, m->sy + m->wah);
1876 break;
1877 case BarOff:
1878 XMoveWindow(dpy, m->barwin, m->sx, m->sy - bh);
1879 break;
1880 }
1881 XSync(dpy, False);
1882 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1883 }
1884
1885 void
1886 updatesizehints(Client *c) {
1887 long msize;
1888 XSizeHints size;
1889
1890 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1891 size.flags = PSize;
1892 c->flags = size.flags;
1893 if(c->flags & PBaseSize) {
1894 c->basew = size.base_width;
1895 c->baseh = size.base_height;
1896 }
1897 else if(c->flags & PMinSize) {
1898 c->basew = size.min_width;
1899 c->baseh = size.min_height;
1900 }
1901 else
1902 c->basew = c->baseh = 0;
1903 if(c->flags & PResizeInc) {
1904 c->incw = size.width_inc;
1905 c->inch = size.height_inc;
1906 }
1907 else
1908 c->incw = c->inch = 0;
1909 if(c->flags & PMaxSize) {
1910 c->maxw = size.max_width;
1911 c->maxh = size.max_height;
1912 }
1913 else
1914 c->maxw = c->maxh = 0;
1915 if(c->flags & PMinSize) {
1916 c->minw = size.min_width;
1917 c->minh = size.min_height;
1918 }
1919 else if(c->flags & PBaseSize) {
1920 c->minw = size.base_width;
1921 c->minh = size.base_height;
1922 }
1923 else
1924 c->minw = c->minh = 0;
1925 if(c->flags & PAspect) {
1926 c->minax = size.min_aspect.x;
1927 c->maxax = size.max_aspect.x;
1928 c->minay = size.min_aspect.y;
1929 c->maxay = size.max_aspect.y;
1930 }
1931 else
1932 c->minax = c->maxax = c->minay = c->maxay = 0;
1933 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1934 && c->maxw == c->minw && c->maxh == c->minh);
1935 }
1936
1937 void
1938 updatetitle(Client *c) {
1939 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1940 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1941 }
1942
1943 void
1944 updatewmhints(Client *c) {
1945 XWMHints *wmh;
1946
1947 if((wmh = XGetWMHints(dpy, c->win))) {
1948 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1949 XFree(wmh);
1950 }
1951 }
1952
1953 /* There's no way to check accesses to destroyed windows, thus those cases are
1954 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1955 * default error handler, which may call exit. */
1956 int
1957 xerror(Display *dpy, XErrorEvent *ee) {
1958 if(ee->error_code == BadWindow
1959 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1960 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1961 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1962 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1963 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1964 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1965 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1966 return 0;
1967 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1968 ee->request_code, ee->error_code);
1969 return xerrorxlib(dpy, ee); /* may call exit */
1970 }
1971
1972 int
1973 xerrordummy(Display *dsply, XErrorEvent *ee) {
1974 return 0;
1975 }
1976
1977 /* Startup Error handler to check if another window manager
1978 * is already running. */
1979 int
1980 xerrorstart(Display *dsply, XErrorEvent *ee) {
1981 otherwm = True;
1982 return -1;
1983 }
1984
1985 void
1986 view(const char *arg) {
1987 unsigned int i;
1988 Bool tmp[LENGTH(tags)];
1989 Monitor *m = monitorat();
1990
1991 for(i = 0; i < LENGTH(tags); i++)
1992 tmp[i] = (NULL == arg);
1993 tmp[idxoftag(arg)] = True;
1994 if(memcmp(m->seltags, tmp, sizeof initags) != 0) {
1995 memcpy(m->prevtags, m->seltags, sizeof initags);
1996 memcpy(m->seltags, tmp, sizeof initags);
1997 arrange(m);
1998 }
1999 }
2000
2001 void
2002 viewprevtag(const char *arg) {
2003 static Bool tmp[LENGTH(tags)];
2004
2005 Monitor *m = monitorat();
2006
2007 memcpy(tmp, m->seltags, sizeof initags);
2008 memcpy(m->seltags, m->prevtags, sizeof initags);
2009 memcpy(m->prevtags, tmp, sizeof initags);
2010 arrange(m);
2011 }
2012
2013 void
2014 zoom(const char *arg) {
2015 Client *c = sel;
2016
2017 if(!sel || !dozoom || sel->isfloating)
2018 return;
2019 if(c == nexttiled(clients, c->monitor))
2020 if(!(c = nexttiled(c->next, c->monitor)))
2021 return;
2022 detach(c);
2023 attach(c);
2024 focus(c);
2025 arrange(c->monitor);
2026 }
2027
2028 void
2029 movetomonitor(const char *arg) {
2030 int i;
2031
2032 if (sel)
2033 return;
2034 if(arg)
2035 i = atoi(arg);
2036 else {
2037 for(i = 0; &monitors[i] != sel->monitor && i < mcount; i++);
2038 i++;
2039 }
2040 sel->monitor = &monitors[i % mcount];
2041
2042 memcpy(sel->tags, sel->monitor->seltags, sizeof initags);
2043 resize(sel, sel->monitor->wax, sel->monitor->way, sel->w, sel->h, True);
2044 arrange(sel->monitor);
2045 }
2046
2047 void
2048 selectmonitor(const char *arg) {
2049 int i;
2050 Monitor *m;
2051
2052 if(arg)
2053 i = atoi(arg);
2054 else {
2055 for(i = 0; &monitors[i] != sel->monitor && i < mcount; i++);
2056 i++;
2057 }
2058 m = &monitors[i % mcount];
2059 XWarpPointer(dpy, None, root, 0, 0, 0, 0, m->wax+m->waw/2, m->way+m->wah/2);
2060 focus(NULL);
2061 }
2062
2063
2064 int
2065 main(int argc, char *argv[]) {
2066 if(argc == 2 && !strcmp("-v", argv[1]))
2067 eprint("dwm-"VERSION", © 2006-2008 Anselm R. Garbe, Sander van Dijk, "
2068 "Jukka Salmi, Premysl Hruby, Szabolcs Nagy, Christof Musik\n");
2069 else if(argc != 1)
2070 eprint("usage: dwm [-v]\n");
2071
2072 setlocale(LC_CTYPE, "");
2073 if(!(dpy = XOpenDisplay(0)))
2074 eprint("dwm: cannot open display\n");
2075
2076 checkotherwm();
2077 setup();
2078 scan();
2079 run();
2080 cleanup();
2081
2082 XCloseDisplay(dpy);
2083 return 0;
2084 }