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