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