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