dwm.c (view raw)
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 <X11/cursorfont.h>
37#include <X11/keysym.h>
38#include <X11/Xatom.h>
39#include <X11/Xlib.h>
40#include <X11/Xproto.h>
41#include <X11/Xutil.h>
42
43/* macros */
44#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46#define LENGTH(x) (sizeof x / sizeof x[0])
47#define MAXTAGLEN 16
48#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
49
50/* enums */
51enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
52enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
53enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
54enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
55
56/* typedefs */
57typedef struct Client Client;
58struct Client {
59 char name[256];
60 int x, y, w, h;
61 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
62 int minax, maxax, minay, maxay;
63 long flags;
64 unsigned int border, oldborder;
65 Bool isbanned, isfixed, isfloating, isurgent;
66 Bool *tags;
67 Client *next;
68 Client *prev;
69 Client *snext;
70 Window win;
71};
72
73typedef struct {
74 int x, y, w, h;
75 unsigned long norm[ColLast];
76 unsigned long sel[ColLast];
77 Drawable drawable;
78 GC gc;
79 struct {
80 int ascent;
81 int descent;
82 int height;
83 XFontSet set;
84 XFontStruct *xfont;
85 } font;
86} DC; /* draw context */
87
88typedef struct {
89 unsigned long mod;
90 KeySym keysym;
91 void (*func)(const char *arg);
92 const char *arg;
93} Key;
94
95typedef struct {
96 const char *symbol;
97 void (*arrange)(void);
98 Bool isfloating;
99} Layout; /* TODO: layout should keep an auxilliary pointer to its Geometry,
100 instead of having all those layout specific vars globally */
101
102typedef struct {
103 const char *prop;
104 const char *tag;
105 Bool isfloating;
106} Rule;
107
108/* function declarations */
109void applyrules(Client *c);
110void arrange(void);
111void attach(Client *c);
112void attachstack(Client *c);
113void ban(Client *c);
114void buttonpress(XEvent *e);
115void checkotherwm(void);
116void cleanup(void);
117void configure(Client *c);
118void configurenotify(XEvent *e);
119void configurerequest(XEvent *e);
120void destroynotify(XEvent *e);
121void detach(Client *c);
122void detachstack(Client *c);
123void drawbar(void);
124void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
125void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
126void *emallocz(unsigned int size);
127void enternotify(XEvent *e);
128void eprint(const char *errstr, ...);
129void expose(XEvent *e);
130void floating(void); /* default floating layout */
131void focus(Client *c);
132void focusin(XEvent *e);
133void focusnext(const char *arg);
134void focusprev(const char *arg);
135Client *getclient(Window w);
136unsigned long getcolor(const char *colstr);
137long getstate(Window w);
138Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
139void grabbuttons(Client *c, Bool focused);
140void grabkeys(void);
141unsigned int idxoftag(const char *t);
142void initfont(const char *fontstr);
143Bool isoccupied(unsigned int t);
144Bool isprotodel(Client *c);
145Bool isurgent(unsigned int t);
146Bool isvisible(Client *c);
147void keypress(XEvent *e);
148void killclient(const char *arg);
149void manage(Window w, XWindowAttributes *wa);
150void mappingnotify(XEvent *e);
151void maprequest(XEvent *e);
152void monocle(void);
153void movemouse(Client *c);
154Client *nexttiled(Client *c);
155void propertynotify(XEvent *e);
156void quit(const char *arg);
157void reapply(const char *arg);
158void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
159void resizemouse(Client *c);
160void restack(void);
161void run(void);
162void scan(void);
163void setclientstate(Client *c, long state);
164void setdefaultgeoms(void);
165void setlayout(const char *arg);
166void setup(void);
167void spawn(const char *arg);
168void tag(const char *arg);
169unsigned int textnw(const char *text, unsigned int len);
170unsigned int textw(const char *text);
171void tileh(void);
172void tilehstack(unsigned int n);
173unsigned int tilemaster(void);
174void tilev(void);
175void tilevstack(unsigned int n);
176void togglefloating(const char *arg);
177void toggletag(const char *arg);
178void toggleview(const char *arg);
179void unban(Client *c);
180void unmanage(Client *c);
181void unmapnotify(XEvent *e);
182void updatebarpos(void);
183void updatesizehints(Client *c);
184void updatetitle(Client *c);
185void updatewmhints(Client *c);
186void view(const char *arg);
187void viewprevtag(const char *arg); /* views previous selected tags */
188int xerror(Display *dpy, XErrorEvent *ee);
189int xerrordummy(Display *dpy, XErrorEvent *ee);
190int xerrorstart(Display *dpy, XErrorEvent *ee);
191void zoom(const char *arg);
192
193/* variables */
194char stext[256], buf[256];
195int screen, sx, sy, sw, sh;
196int (*xerrorxlib)(Display *, XErrorEvent *);
197int bx, by, bw, bh, blw, mx, my, mw, mh, mox, moy, mow, moh, tx, ty, tw, th, wx, wy, ww, wh;
198unsigned int numlockmask = 0;
199void (*handler[LASTEvent]) (XEvent *) = {
200 [ButtonPress] = buttonpress,
201 [ConfigureRequest] = configurerequest,
202 [ConfigureNotify] = configurenotify,
203 [DestroyNotify] = destroynotify,
204 [EnterNotify] = enternotify,
205 [Expose] = expose,
206 [FocusIn] = focusin,
207 [KeyPress] = keypress,
208 [MappingNotify] = mappingnotify,
209 [MapRequest] = maprequest,
210 [PropertyNotify] = propertynotify,
211 [UnmapNotify] = unmapnotify
212};
213Atom wmatom[WMLast], netatom[NetLast];
214Bool otherwm, readin;
215Bool running = True;
216Bool *prevtags;
217Bool *seltags;
218Client *clients = NULL;
219Client *sel = NULL;
220Client *stack = NULL;
221Cursor cursor[CurLast];
222Display *dpy;
223DC dc = {0};
224Layout *lt = NULL;
225Window root, barwin;
226void (*setgeoms)(void) = setdefaultgeoms;
227
228/* configuration, allows nested code to access above variables */
229#include "config.h"
230#define TAGSZ (LENGTH(tags) * sizeof(Bool))
231static Bool tmp[LENGTH(tags)];
232
233/* function implementations */
234
235void
236applyrules(Client *c) {
237 unsigned int i;
238 Bool matched = False;
239 Rule *r;
240 XClassHint ch = { 0 };
241
242 /* rule matching */
243 XGetClassHint(dpy, c->win, &ch);
244 for(i = 0; i < LENGTH(rules); i++) {
245 r = &rules[i];
246 if(strstr(c->name, r->prop)
247 || (ch.res_class && strstr(ch.res_class, r->prop))
248 || (ch.res_name && strstr(ch.res_name, r->prop)))
249 {
250 c->isfloating = r->isfloating;
251 if(r->tag) {
252 c->tags[idxoftag(r->tag)] = True;
253 matched = True;
254 }
255 }
256 }
257 if(ch.res_class)
258 XFree(ch.res_class);
259 if(ch.res_name)
260 XFree(ch.res_name);
261 if(!matched)
262 memcpy(c->tags, seltags, TAGSZ);
263}
264
265void
266arrange(void) {
267 Client *c;
268
269 for(c = clients; c; c = c->next)
270 if(isvisible(c))
271 unban(c);
272 else
273 ban(c);
274
275 focus(NULL);
276 lt->arrange();
277 restack();
278}
279
280void
281attach(Client *c) {
282 if(clients)
283 clients->prev = c;
284 c->next = clients;
285 clients = c;
286}
287
288void
289attachstack(Client *c) {
290 c->snext = stack;
291 stack = c;
292}
293
294void
295ban(Client *c) {
296 if(c->isbanned)
297 return;
298 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
299 c->isbanned = True;
300}
301
302void
303buttonpress(XEvent *e) {
304 unsigned int i, x;
305 Client *c;
306 XButtonPressedEvent *ev = &e->xbutton;
307
308 if(ev->window == barwin) {
309 x = 0;
310 for(i = 0; i < LENGTH(tags); i++) {
311 x += textw(tags[i]);
312 if(ev->x < x) {
313 if(ev->button == Button1) {
314 if(ev->state & MODKEY)
315 tag(tags[i]);
316 else
317 view(tags[i]);
318 }
319 else if(ev->button == Button3) {
320 if(ev->state & MODKEY)
321 toggletag(tags[i]);
322 else
323 toggleview(tags[i]);
324 }
325 return;
326 }
327 }
328 }
329 else if((c = getclient(ev->window))) {
330 focus(c);
331 if(CLEANMASK(ev->state) != MODKEY)
332 return;
333 if(ev->button == Button1) {
334 restack();
335 movemouse(c);
336 }
337 else if(ev->button == Button2) {
338 if((floating != lt->arrange) && c->isfloating)
339 togglefloating(NULL);
340 else
341 zoom(NULL);
342 }
343 else if(ev->button == Button3 && !c->isfixed) {
344 restack();
345 resizemouse(c);
346 }
347 }
348}
349
350void
351checkotherwm(void) {
352 otherwm = False;
353 XSetErrorHandler(xerrorstart);
354
355 /* this causes an error if some other window manager is running */
356 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
357 XSync(dpy, False);
358 if(otherwm)
359 eprint("dwm: another window manager is already running\n");
360 XSync(dpy, False);
361 XSetErrorHandler(NULL);
362 xerrorxlib = XSetErrorHandler(xerror);
363 XSync(dpy, False);
364}
365
366void
367cleanup(void) {
368 close(STDIN_FILENO);
369 while(stack) {
370 unban(stack);
371 unmanage(stack);
372 }
373 if(dc.font.set)
374 XFreeFontSet(dpy, dc.font.set);
375 else
376 XFreeFont(dpy, dc.font.xfont);
377 XUngrabKey(dpy, AnyKey, AnyModifier, root);
378 XFreePixmap(dpy, dc.drawable);
379 XFreeGC(dpy, dc.gc);
380 XFreeCursor(dpy, cursor[CurNormal]);
381 XFreeCursor(dpy, cursor[CurResize]);
382 XFreeCursor(dpy, cursor[CurMove]);
383 XDestroyWindow(dpy, barwin);
384 XSync(dpy, False);
385 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
386}
387
388void
389configure(Client *c) {
390 XConfigureEvent ce;
391
392 ce.type = ConfigureNotify;
393 ce.display = dpy;
394 ce.event = c->win;
395 ce.window = c->win;
396 ce.x = c->x;
397 ce.y = c->y;
398 ce.width = c->w;
399 ce.height = c->h;
400 ce.border_width = c->border;
401 ce.above = None;
402 ce.override_redirect = False;
403 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
404}
405
406void
407configurenotify(XEvent *e) {
408 XConfigureEvent *ev = &e->xconfigure;
409
410 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
411 setgeoms();
412 updatebarpos();
413 arrange();
414 }
415}
416
417void
418configurerequest(XEvent *e) {
419 Client *c;
420 XConfigureRequestEvent *ev = &e->xconfigurerequest;
421 XWindowChanges wc;
422
423 if((c = getclient(ev->window))) {
424 if(ev->value_mask & CWBorderWidth)
425 c->border = ev->border_width;
426 if(c->isfixed || c->isfloating || lt->isfloating) {
427 if(ev->value_mask & CWX)
428 c->x = sx + ev->x;
429 if(ev->value_mask & CWY)
430 c->y = sy + ev->y;
431 if(ev->value_mask & CWWidth)
432 c->w = ev->width;
433 if(ev->value_mask & CWHeight)
434 c->h = ev->height;
435 if((c->x - sx + c->w) > sw && c->isfloating)
436 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
437 if((c->y - sy + c->h) > sh && c->isfloating)
438 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
439 if((ev->value_mask & (CWX|CWY))
440 && !(ev->value_mask & (CWWidth|CWHeight)))
441 configure(c);
442 if(isvisible(c))
443 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
444 }
445 else
446 configure(c);
447 }
448 else {
449 wc.x = ev->x;
450 wc.y = ev->y;
451 wc.width = ev->width;
452 wc.height = ev->height;
453 wc.border_width = ev->border_width;
454 wc.sibling = ev->above;
455 wc.stack_mode = ev->detail;
456 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
457 }
458 XSync(dpy, False);
459}
460
461void
462destroynotify(XEvent *e) {
463 Client *c;
464 XDestroyWindowEvent *ev = &e->xdestroywindow;
465
466 if((c = getclient(ev->window)))
467 unmanage(c);
468}
469
470void
471detach(Client *c) {
472 if(c->prev)
473 c->prev->next = c->next;
474 if(c->next)
475 c->next->prev = c->prev;
476 if(c == clients)
477 clients = c->next;
478 c->next = c->prev = NULL;
479}
480
481void
482detachstack(Client *c) {
483 Client **tc;
484
485 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
486 *tc = c->snext;
487}
488
489void
490drawbar(void) {
491 int i, x;
492 Client *c;
493
494 dc.x = 0;
495 for(c = stack; c && !isvisible(c); c = c->snext);
496 for(i = 0; i < LENGTH(tags); i++) {
497 dc.w = textw(tags[i]);
498 if(seltags[i]) {
499 drawtext(tags[i], dc.sel, isurgent(i));
500 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
501 }
502 else {
503 drawtext(tags[i], dc.norm, isurgent(i));
504 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
505 }
506 dc.x += dc.w;
507 }
508 dc.w = blw;
509 drawtext(lt->symbol, dc.norm, False);
510 x = dc.x + dc.w;
511 dc.w = textw(stext);
512 dc.x = bw - dc.w;
513 if(dc.x < x) {
514 dc.x = x;
515 dc.w = bw - x;
516 }
517 drawtext(stext, dc.norm, False);
518 if((dc.w = dc.x - x) > bh) {
519 dc.x = x;
520 if(c) {
521 drawtext(c->name, dc.sel, False);
522 drawsquare(False, c->isfloating, False, dc.sel);
523 }
524 else
525 drawtext(NULL, dc.norm, False);
526 }
527 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
528 XSync(dpy, False);
529}
530
531void
532drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
533 int x;
534 XGCValues gcv;
535 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
536
537 gcv.foreground = col[invert ? ColBG : ColFG];
538 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
539 x = (dc.font.ascent + dc.font.descent + 2) / 4;
540 r.x = dc.x + 1;
541 r.y = dc.y + 1;
542 if(filled) {
543 r.width = r.height = x + 1;
544 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
545 }
546 else if(empty) {
547 r.width = r.height = x;
548 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
549 }
550}
551
552void
553drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
554 int x, y, w, h;
555 unsigned int len, olen;
556 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
557
558 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
559 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
560 if(!text)
561 return;
562 w = 0;
563 olen = len = strlen(text);
564 if(len >= sizeof buf)
565 len = sizeof buf - 1;
566 memcpy(buf, text, len);
567 buf[len] = 0;
568 h = dc.font.ascent + dc.font.descent;
569 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
570 x = dc.x + (h / 2);
571 /* shorten text if necessary */
572 while(len && (w = textnw(buf, len)) > dc.w - h)
573 buf[--len] = 0;
574 if(len < olen) {
575 if(len > 1)
576 buf[len - 1] = '.';
577 if(len > 2)
578 buf[len - 2] = '.';
579 if(len > 3)
580 buf[len - 3] = '.';
581 }
582 if(w > dc.w)
583 return; /* too long */
584 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
585 if(dc.font.set)
586 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
587 else
588 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
589}
590
591void *
592emallocz(unsigned int size) {
593 void *res = calloc(1, size);
594
595 if(!res)
596 eprint("fatal: could not malloc() %u bytes\n", size);
597 return res;
598}
599
600void
601enternotify(XEvent *e) {
602 Client *c;
603 XCrossingEvent *ev = &e->xcrossing;
604
605 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
606 return;
607 if((c = getclient(ev->window)))
608 focus(c);
609 else
610 focus(NULL);
611}
612
613void
614eprint(const char *errstr, ...) {
615 va_list ap;
616
617 va_start(ap, errstr);
618 vfprintf(stderr, errstr, ap);
619 va_end(ap);
620 exit(EXIT_FAILURE);
621}
622
623void
624expose(XEvent *e) {
625 XExposeEvent *ev = &e->xexpose;
626
627 if(ev->count == 0 && (ev->window == barwin))
628 drawbar();
629}
630
631void
632floating(void) { /* default floating layout */
633 Client *c;
634
635 for(c = clients; c; c = c->next)
636 if(isvisible(c))
637 resize(c, c->x, c->y, c->w, c->h, True);
638}
639
640void
641focus(Client *c) {
642 if(!c || (c && !isvisible(c)))
643 for(c = stack; c && !isvisible(c); c = c->snext);
644 if(sel && sel != c) {
645 grabbuttons(sel, False);
646 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
647 }
648 if(c) {
649 detachstack(c);
650 attachstack(c);
651 grabbuttons(c, True);
652 }
653 sel = c;
654 if(c) {
655 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
656 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
657 }
658 else
659 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
660 drawbar();
661}
662
663void
664focusin(XEvent *e) { /* there are some broken focus acquiring clients */
665 XFocusChangeEvent *ev = &e->xfocus;
666
667 if(sel && ev->window != sel->win)
668 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
669}
670
671void
672focusnext(const char *arg) {
673 Client *c;
674
675 if(!sel)
676 return;
677 for(c = sel->next; c && !isvisible(c); c = c->next);
678 if(!c)
679 for(c = clients; c && !isvisible(c); c = c->next);
680 if(c) {
681 focus(c);
682 restack();
683 }
684}
685
686void
687focusprev(const char *arg) {
688 Client *c;
689
690 if(!sel)
691 return;
692 for(c = sel->prev; c && !isvisible(c); c = c->prev);
693 if(!c) {
694 for(c = clients; c && c->next; c = c->next);
695 for(; c && !isvisible(c); c = c->prev);
696 }
697 if(c) {
698 focus(c);
699 restack();
700 }
701}
702
703Client *
704getclient(Window w) {
705 Client *c;
706
707 for(c = clients; c && c->win != w; c = c->next);
708 return c;
709}
710
711unsigned long
712getcolor(const char *colstr) {
713 Colormap cmap = DefaultColormap(dpy, screen);
714 XColor color;
715
716 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
717 eprint("error, cannot allocate color '%s'\n", colstr);
718 return color.pixel;
719}
720
721long
722getstate(Window w) {
723 int format, status;
724 long result = -1;
725 unsigned char *p = NULL;
726 unsigned long n, extra;
727 Atom real;
728
729 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
730 &real, &format, &n, &extra, (unsigned char **)&p);
731 if(status != Success)
732 return -1;
733 if(n != 0)
734 result = *p;
735 XFree(p);
736 return result;
737}
738
739Bool
740gettextprop(Window w, Atom atom, char *text, unsigned int size) {
741 char **list = NULL;
742 int n;
743 XTextProperty name;
744
745 if(!text || size == 0)
746 return False;
747 text[0] = '\0';
748 XGetTextProperty(dpy, w, &name, atom);
749 if(!name.nitems)
750 return False;
751 if(name.encoding == XA_STRING)
752 strncpy(text, (char *)name.value, size - 1);
753 else {
754 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
755 && n > 0 && *list) {
756 strncpy(text, *list, size - 1);
757 XFreeStringList(list);
758 }
759 }
760 text[size - 1] = '\0';
761 XFree(name.value);
762 return True;
763}
764
765void
766grabbuttons(Client *c, Bool focused) {
767 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
768
769 if(focused) {
770 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
771 GrabModeAsync, GrabModeSync, None, None);
772 XGrabButton(dpy, Button1, MODKEY|LockMask, c->win, False, BUTTONMASK,
773 GrabModeAsync, GrabModeSync, None, None);
774 XGrabButton(dpy, Button1, MODKEY|numlockmask, c->win, False, BUTTONMASK,
775 GrabModeAsync, GrabModeSync, None, None);
776 XGrabButton(dpy, Button1, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
777 GrabModeAsync, GrabModeSync, None, None);
778
779 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
780 GrabModeAsync, GrabModeSync, None, None);
781 XGrabButton(dpy, Button2, MODKEY|LockMask, c->win, False, BUTTONMASK,
782 GrabModeAsync, GrabModeSync, None, None);
783 XGrabButton(dpy, Button2, MODKEY|numlockmask, c->win, False, BUTTONMASK,
784 GrabModeAsync, GrabModeSync, None, None);
785 XGrabButton(dpy, Button2, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
786 GrabModeAsync, GrabModeSync, None, None);
787
788 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
789 GrabModeAsync, GrabModeSync, None, None);
790 XGrabButton(dpy, Button3, MODKEY|LockMask, c->win, False, BUTTONMASK,
791 GrabModeAsync, GrabModeSync, None, None);
792 XGrabButton(dpy, Button3, MODKEY|numlockmask, c->win, False, BUTTONMASK,
793 GrabModeAsync, GrabModeSync, None, None);
794 XGrabButton(dpy, Button3, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
795 GrabModeAsync, GrabModeSync, None, None);
796 }
797 else
798 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
799 GrabModeAsync, GrabModeSync, None, None);
800}
801
802void
803grabkeys(void) {
804 unsigned int i, j;
805 KeyCode code;
806 XModifierKeymap *modmap;
807
808 /* init modifier map */
809 modmap = XGetModifierMapping(dpy);
810 for(i = 0; i < 8; i++)
811 for(j = 0; j < modmap->max_keypermod; j++) {
812 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
813 numlockmask = (1 << i);
814 }
815 XFreeModifiermap(modmap);
816
817 XUngrabKey(dpy, AnyKey, AnyModifier, root);
818 for(i = 0; i < LENGTH(keys); i++) {
819 code = XKeysymToKeycode(dpy, keys[i].keysym);
820 XGrabKey(dpy, code, keys[i].mod, root, True,
821 GrabModeAsync, GrabModeAsync);
822 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
823 GrabModeAsync, GrabModeAsync);
824 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
825 GrabModeAsync, GrabModeAsync);
826 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
827 GrabModeAsync, GrabModeAsync);
828 }
829}
830
831unsigned int
832idxoftag(const char *t) {
833 unsigned int i;
834
835 for(i = 0; (i < LENGTH(tags)) && (tags[i] != t); i++);
836 return (i < LENGTH(tags)) ? i : 0;
837}
838
839void
840initfont(const char *fontstr) {
841 char *def, **missing;
842 int i, n;
843
844 missing = NULL;
845 if(dc.font.set)
846 XFreeFontSet(dpy, dc.font.set);
847 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
848 if(missing) {
849 while(n--)
850 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
851 XFreeStringList(missing);
852 }
853 if(dc.font.set) {
854 XFontSetExtents *font_extents;
855 XFontStruct **xfonts;
856 char **font_names;
857 dc.font.ascent = dc.font.descent = 0;
858 font_extents = XExtentsOfFontSet(dc.font.set);
859 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
860 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
861 if(dc.font.ascent < (*xfonts)->ascent)
862 dc.font.ascent = (*xfonts)->ascent;
863 if(dc.font.descent < (*xfonts)->descent)
864 dc.font.descent = (*xfonts)->descent;
865 xfonts++;
866 }
867 }
868 else {
869 if(dc.font.xfont)
870 XFreeFont(dpy, dc.font.xfont);
871 dc.font.xfont = NULL;
872 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
873 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
874 eprint("error, cannot load font: '%s'\n", fontstr);
875 dc.font.ascent = dc.font.xfont->ascent;
876 dc.font.descent = dc.font.xfont->descent;
877 }
878 dc.font.height = dc.font.ascent + dc.font.descent;
879}
880
881Bool
882isoccupied(unsigned int t) {
883 Client *c;
884
885 for(c = clients; c; c = c->next)
886 if(c->tags[t])
887 return True;
888 return False;
889}
890
891Bool
892isprotodel(Client *c) {
893 int i, n;
894 Atom *protocols;
895 Bool ret = False;
896
897 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
898 for(i = 0; !ret && i < n; i++)
899 if(protocols[i] == wmatom[WMDelete])
900 ret = True;
901 XFree(protocols);
902 }
903 return ret;
904}
905
906Bool
907isurgent(unsigned int t) {
908 Client *c;
909
910 for(c = clients; c; c = c->next)
911 if(c->isurgent && c->tags[t])
912 return True;
913 return False;
914}
915
916Bool
917isvisible(Client *c) {
918 unsigned int i;
919
920 for(i = 0; i < LENGTH(tags); i++)
921 if(c->tags[i] && seltags[i])
922 return True;
923 return False;
924}
925
926void
927keypress(XEvent *e) {
928 unsigned int i;
929 KeySym keysym;
930 XKeyEvent *ev;
931
932 ev = &e->xkey;
933 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
934 for(i = 0; i < LENGTH(keys); i++)
935 if(keysym == keys[i].keysym
936 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
937 {
938 if(keys[i].func)
939 keys[i].func(keys[i].arg);
940 }
941}
942
943void
944killclient(const char *arg) {
945 XEvent ev;
946
947 if(!sel)
948 return;
949 if(isprotodel(sel)) {
950 ev.type = ClientMessage;
951 ev.xclient.window = sel->win;
952 ev.xclient.message_type = wmatom[WMProtocols];
953 ev.xclient.format = 32;
954 ev.xclient.data.l[0] = wmatom[WMDelete];
955 ev.xclient.data.l[1] = CurrentTime;
956 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
957 }
958 else
959 XKillClient(dpy, sel->win);
960}
961
962void
963manage(Window w, XWindowAttributes *wa) {
964 Client *c, *t = NULL;
965 Status rettrans;
966 Window trans;
967 XWindowChanges wc;
968
969 c = emallocz(sizeof(Client));
970 c->tags = emallocz(TAGSZ);
971 c->win = w;
972
973 /* geometry */
974 c->x = wa->x;
975 c->y = wa->y;
976 c->w = wa->width;
977 c->h = wa->height;
978 c->oldborder = wa->border_width;
979 if(c->w == sw && c->h == sh) {
980 c->x = sx;
981 c->y = sy;
982 c->border = wa->border_width;
983 }
984 else {
985 if(c->x + c->w + 2 * c->border > wx + ww)
986 c->x = wx + ww - c->w - 2 * c->border;
987 if(c->y + c->h + 2 * c->border > wy + wh)
988 c->y = wy + wh - c->h - 2 * c->border;
989 if(c->x < wx)
990 c->x = wx;
991 if(c->y < wy)
992 c->y = wy;
993 c->border = BORDERPX;
994 }
995
996 wc.border_width = c->border;
997 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
998 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
999 configure(c); /* propagates border_width, if size doesn't change */
1000 updatesizehints(c);
1001 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1002 grabbuttons(c, False);
1003 updatetitle(c);
1004 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1005 for(t = clients; t && t->win != trans; t = t->next);
1006 if(t)
1007 memcpy(c->tags, t->tags, TAGSZ);
1008 else
1009 applyrules(c);
1010 if(!c->isfloating)
1011 c->isfloating = (rettrans == Success) || c->isfixed;
1012 attach(c);
1013 attachstack(c);
1014 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1015 ban(c);
1016 XMapWindow(dpy, c->win);
1017 setclientstate(c, NormalState);
1018 arrange();
1019}
1020
1021void
1022mappingnotify(XEvent *e) {
1023 XMappingEvent *ev = &e->xmapping;
1024
1025 XRefreshKeyboardMapping(ev);
1026 if(ev->request == MappingKeyboard)
1027 grabkeys();
1028}
1029
1030void
1031maprequest(XEvent *e) {
1032 static XWindowAttributes wa;
1033 XMapRequestEvent *ev = &e->xmaprequest;
1034
1035 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1036 return;
1037 if(wa.override_redirect)
1038 return;
1039 if(!getclient(ev->window))
1040 manage(ev->window, &wa);
1041}
1042
1043void
1044monocle(void) {
1045 Client *c;
1046
1047 for(c = clients; c; c = c->next)
1048 if(isvisible(c))
1049 resize(c, mox, moy, mow, moh, RESIZEHINTS);
1050}
1051
1052void
1053movemouse(Client *c) {
1054 int x1, y1, ocx, ocy, di, nx, ny;
1055 unsigned int dui;
1056 Window dummy;
1057 XEvent ev;
1058
1059 ocx = nx = c->x;
1060 ocy = ny = c->y;
1061 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1062 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1063 return;
1064 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1065 for(;;) {
1066 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1067 switch (ev.type) {
1068 case ButtonRelease:
1069 XUngrabPointer(dpy, CurrentTime);
1070 return;
1071 case ConfigureRequest:
1072 case Expose:
1073 case MapRequest:
1074 handler[ev.type](&ev);
1075 break;
1076 case MotionNotify:
1077 XSync(dpy, False);
1078 nx = ocx + (ev.xmotion.x - x1);
1079 ny = ocy + (ev.xmotion.y - y1);
1080 if(abs(wx - nx) < SNAP)
1081 nx = wx;
1082 else if(abs((wx + ww) - (nx + c->w + 2 * c->border)) < SNAP)
1083 nx = wx + ww - c->w - 2 * c->border;
1084 if(abs(wy - ny) < SNAP)
1085 ny = wy;
1086 else if(abs((wy + wh) - (ny + c->h + 2 * c->border)) < SNAP)
1087 ny = wy + wh - c->h - 2 * c->border;
1088 if(!c->isfloating && !lt->isfloating && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1089 togglefloating(NULL);
1090 if((lt->isfloating) || c->isfloating)
1091 resize(c, nx, ny, c->w, c->h, False);
1092 break;
1093 }
1094 }
1095}
1096
1097Client *
1098nexttiled(Client *c) {
1099 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1100 return c;
1101}
1102
1103void
1104propertynotify(XEvent *e) {
1105 Client *c;
1106 Window trans;
1107 XPropertyEvent *ev = &e->xproperty;
1108
1109 if(ev->state == PropertyDelete)
1110 return; /* ignore */
1111 if((c = getclient(ev->window))) {
1112 switch (ev->atom) {
1113 default: break;
1114 case XA_WM_TRANSIENT_FOR:
1115 XGetTransientForHint(dpy, c->win, &trans);
1116 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1117 arrange();
1118 break;
1119 case XA_WM_NORMAL_HINTS:
1120 updatesizehints(c);
1121 break;
1122 case XA_WM_HINTS:
1123 updatewmhints(c);
1124 drawbar();
1125 break;
1126 }
1127 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1128 updatetitle(c);
1129 if(c == sel)
1130 drawbar();
1131 }
1132 }
1133}
1134
1135void
1136quit(const char *arg) {
1137 readin = running = False;
1138}
1139
1140void
1141reapply(const char *arg) {
1142 static Bool zerotags[LENGTH(tags)] = { 0 };
1143 Client *c;
1144
1145 for(c = clients; c; c = c->next) {
1146 memcpy(c->tags, zerotags, sizeof zerotags);
1147 applyrules(c);
1148 }
1149 arrange();
1150}
1151
1152void
1153resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1154 XWindowChanges wc;
1155
1156 if(sizehints) {
1157 /* set minimum possible */
1158 if (w < 1)
1159 w = 1;
1160 if (h < 1)
1161 h = 1;
1162
1163 /* temporarily remove base dimensions */
1164 w -= c->basew;
1165 h -= c->baseh;
1166
1167 /* adjust for aspect limits */
1168 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1169 if (w * c->maxay > h * c->maxax)
1170 w = h * c->maxax / c->maxay;
1171 else if (w * c->minay < h * c->minax)
1172 h = w * c->minay / c->minax;
1173 }
1174
1175 /* adjust for increment value */
1176 if(c->incw)
1177 w -= w % c->incw;
1178 if(c->inch)
1179 h -= h % c->inch;
1180
1181 /* restore base dimensions */
1182 w += c->basew;
1183 h += c->baseh;
1184
1185 if(c->minw > 0 && w < c->minw)
1186 w = c->minw;
1187 if(c->minh > 0 && h < c->minh)
1188 h = c->minh;
1189 if(c->maxw > 0 && w > c->maxw)
1190 w = c->maxw;
1191 if(c->maxh > 0 && h > c->maxh)
1192 h = c->maxh;
1193 }
1194 if(w <= 0 || h <= 0)
1195 return;
1196 if(x > sx + sw)
1197 x = sw - w - 2 * c->border;
1198 if(y > sy + sh)
1199 y = sh - h - 2 * c->border;
1200 if(x + w + 2 * c->border < sx)
1201 x = sx;
1202 if(y + h + 2 * c->border < sy)
1203 y = sy;
1204 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1205 c->x = wc.x = x;
1206 c->y = wc.y = y;
1207 c->w = wc.width = w;
1208 c->h = wc.height = h;
1209 wc.border_width = c->border;
1210 XConfigureWindow(dpy, c->win,
1211 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1212 configure(c);
1213 XSync(dpy, False);
1214 }
1215}
1216
1217void
1218resizemouse(Client *c) {
1219 int ocx, ocy;
1220 int nw, nh;
1221 XEvent ev;
1222
1223 ocx = c->x;
1224 ocy = c->y;
1225 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1226 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1227 return;
1228 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1229 for(;;) {
1230 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1231 switch(ev.type) {
1232 case ButtonRelease:
1233 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1234 c->w + c->border - 1, c->h + c->border - 1);
1235 XUngrabPointer(dpy, CurrentTime);
1236 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1237 return;
1238 case ConfigureRequest:
1239 case Expose:
1240 case MapRequest:
1241 handler[ev.type](&ev);
1242 break;
1243 case MotionNotify:
1244 XSync(dpy, False);
1245 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1246 nw = 1;
1247 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1248 nh = 1;
1249 if(!c->isfloating && !lt->isfloating && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1250 togglefloating(NULL);
1251 if((lt->isfloating) || c->isfloating)
1252 resize(c, c->x, c->y, nw, nh, True);
1253 break;
1254 }
1255 }
1256}
1257
1258void
1259restack(void) {
1260 Client *c;
1261 XEvent ev;
1262 XWindowChanges wc;
1263
1264 drawbar();
1265 if(!sel)
1266 return;
1267 if(sel->isfloating || lt->isfloating)
1268 XRaiseWindow(dpy, sel->win);
1269 if(!lt->isfloating) {
1270 wc.stack_mode = Below;
1271 wc.sibling = barwin;
1272 if(!sel->isfloating) {
1273 XConfigureWindow(dpy, sel->win, CWSibling|CWStackMode, &wc);
1274 wc.sibling = sel->win;
1275 }
1276 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1277 if(c == sel)
1278 continue;
1279 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1280 wc.sibling = c->win;
1281 }
1282 }
1283 XSync(dpy, False);
1284 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1285}
1286
1287void
1288run(void) {
1289 char *p;
1290 char sbuf[sizeof stext];
1291 fd_set rd;
1292 int r, xfd;
1293 unsigned int len, offset;
1294 XEvent ev;
1295
1296 /* main event loop, also reads status text from stdin */
1297 XSync(dpy, False);
1298 xfd = ConnectionNumber(dpy);
1299 readin = True;
1300 offset = 0;
1301 len = sizeof stext - 1;
1302 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1303 while(running) {
1304 FD_ZERO(&rd);
1305 if(readin)
1306 FD_SET(STDIN_FILENO, &rd);
1307 FD_SET(xfd, &rd);
1308 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1309 if(errno == EINTR)
1310 continue;
1311 eprint("select failed\n");
1312 }
1313 if(FD_ISSET(STDIN_FILENO, &rd)) {
1314 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1315 case -1:
1316 strncpy(stext, strerror(errno), len);
1317 readin = False;
1318 break;
1319 case 0:
1320 strncpy(stext, "EOF", 4);
1321 readin = False;
1322 break;
1323 default:
1324 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1325 if(*p == '\n' || *p == '\0') {
1326 *p = '\0';
1327 strncpy(stext, sbuf, len);
1328 p += r - 1; /* p is sbuf + offset + r - 1 */
1329 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1330 offset = r;
1331 if(r)
1332 memmove(sbuf, p - r + 1, r);
1333 break;
1334 }
1335 break;
1336 }
1337 drawbar();
1338 }
1339 while(XPending(dpy)) {
1340 XNextEvent(dpy, &ev);
1341 if(handler[ev.type])
1342 (handler[ev.type])(&ev); /* call handler */
1343 }
1344 }
1345}
1346
1347void
1348scan(void) {
1349 unsigned int i, num;
1350 Window *wins, d1, d2;
1351 XWindowAttributes wa;
1352
1353 wins = NULL;
1354 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1355 for(i = 0; i < num; i++) {
1356 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1357 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1358 continue;
1359 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1360 manage(wins[i], &wa);
1361 }
1362 for(i = 0; i < num; i++) { /* now the transients */
1363 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1364 continue;
1365 if(XGetTransientForHint(dpy, wins[i], &d1)
1366 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1367 manage(wins[i], &wa);
1368 }
1369 }
1370 if(wins)
1371 XFree(wins);
1372}
1373
1374void
1375setclientstate(Client *c, long state) {
1376 long data[] = {state, None};
1377
1378 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1379 PropModeReplace, (unsigned char *)data, 2);
1380}
1381
1382void
1383setdefaultgeoms(void) {
1384
1385 /* screen dimensions */
1386 sx = 0;
1387 sy = 0;
1388 sw = DisplayWidth(dpy, screen);
1389 sh = DisplayHeight(dpy, screen);
1390
1391 /* bar position */
1392 bx = sx;
1393 by = sy;
1394 bw = sw;
1395 bh = dc.font.height + 2;
1396
1397 /* window area */
1398 wx = sx;
1399 wy = sy + bh;
1400 ww = sw;
1401 wh = sh - bh;
1402
1403 /* master area */
1404 mx = wx;
1405 my = wy;
1406 mw = ((float)sw) * 0.55;
1407 mh = wh;
1408
1409 /* tile area */
1410 tx = mx + mw;
1411 ty = wy;
1412 tw = ww - mw;
1413 th = wh;
1414
1415 /* monocle area */
1416 mox = wx;
1417 moy = wy;
1418 mow = ww;
1419 moh = wh;
1420}
1421
1422void
1423setlayout(const char *arg) {
1424 static Layout *revert = 0;
1425 unsigned int i;
1426
1427 if(!arg)
1428 return;
1429 for(i = 0; i < LENGTH(layouts); i++)
1430 if(!strcmp(arg, layouts[i].symbol))
1431 break;
1432 if(i == LENGTH(layouts))
1433 return;
1434 if(revert && &layouts[i] == lt)
1435 lt = revert;
1436 else {
1437 revert = lt;
1438 lt = &layouts[i];
1439 }
1440 if(sel)
1441 arrange();
1442 else
1443 drawbar();
1444}
1445
1446void
1447setup(void) {
1448 unsigned int i;
1449 XSetWindowAttributes wa;
1450
1451 /* init screen */
1452 screen = DefaultScreen(dpy);
1453 root = RootWindow(dpy, screen);
1454 initfont(FONT);
1455
1456 /* apply default geometries */
1457 setgeoms();
1458
1459 /* init atoms */
1460 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1461 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1462 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1463 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1464 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1465 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1466
1467 /* init cursors */
1468 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1469 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1470 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1471
1472 /* init appearance */
1473 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1474 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1475 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1476 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1477 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1478 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1479 initfont(FONT);
1480 dc.h = bh;
1481 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1482 dc.gc = XCreateGC(dpy, root, 0, 0);
1483 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1484 if(!dc.font.set)
1485 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1486
1487 /* init tags */
1488 seltags = emallocz(TAGSZ);
1489 prevtags = emallocz(TAGSZ);
1490 seltags[0] = prevtags[0] = True;
1491
1492 /* init layouts */
1493 lt = &layouts[0];
1494
1495 /* init bar */
1496 for(blw = i = 0; i < LENGTH(layouts); i++) {
1497 i = textw(layouts[i].symbol);
1498 if(i > blw)
1499 blw = i;
1500 }
1501
1502 wa.override_redirect = 1;
1503 wa.background_pixmap = ParentRelative;
1504 wa.event_mask = ButtonPressMask|ExposureMask;
1505
1506 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
1507 CopyFromParent, DefaultVisual(dpy, screen),
1508 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1509 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1510 XMapRaised(dpy, barwin);
1511 strcpy(stext, "dwm-"VERSION);
1512 drawbar();
1513
1514 /* EWMH support per view */
1515 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1516 PropModeReplace, (unsigned char *) netatom, NetLast);
1517
1518 /* select for events */
1519 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1520 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1521 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1522 XSelectInput(dpy, root, wa.event_mask);
1523
1524
1525 /* grab keys */
1526 grabkeys();
1527}
1528
1529void
1530spawn(const char *arg) {
1531 static char *shell = NULL;
1532
1533 if(!shell && !(shell = getenv("SHELL")))
1534 shell = "/bin/sh";
1535 if(!arg)
1536 return;
1537 /* The double-fork construct avoids zombie processes and keeps the code
1538 * clean from stupid signal handlers. */
1539 if(fork() == 0) {
1540 if(fork() == 0) {
1541 if(dpy)
1542 close(ConnectionNumber(dpy));
1543 setsid();
1544 execl(shell, shell, "-c", arg, (char *)NULL);
1545 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1546 perror(" failed");
1547 }
1548 exit(0);
1549 }
1550 wait(0);
1551}
1552
1553void
1554tag(const char *arg) {
1555 unsigned int i;
1556
1557 if(!sel)
1558 return;
1559 for(i = 0; i < LENGTH(tags); i++)
1560 sel->tags[i] = (NULL == arg);
1561 sel->tags[idxoftag(arg)] = True;
1562 arrange();
1563}
1564
1565unsigned int
1566textnw(const char *text, unsigned int len) {
1567 XRectangle r;
1568
1569 if(dc.font.set) {
1570 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1571 return r.width;
1572 }
1573 return XTextWidth(dc.font.xfont, text, len);
1574}
1575
1576unsigned int
1577textw(const char *text) {
1578 return textnw(text, strlen(text)) + dc.font.height;
1579}
1580
1581void
1582tileresize(Client *c, int x, int y, int w, int h) {
1583 resize(c, x, y, w, h, RESIZEHINTS);
1584 if((RESIZEHINTS) && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
1585 /* client doesn't accept size constraints */
1586 resize(c, x, y, w, h, False);
1587}
1588
1589void
1590tileh(void) {
1591 tilehstack(tilemaster());
1592}
1593
1594void
1595tilehstack(unsigned int n) {
1596 int i, x, w;
1597 Client *c;
1598
1599 if(n == 0)
1600 return;
1601
1602 x = tx;
1603 w = tw / n;
1604 if(w < bh)
1605 w = tw;
1606
1607 for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++)
1608 if(i > 0) {
1609 if(i > 1 && i == n) /* remainder */
1610 tileresize(c, x, ty, (tx + tw) - x - 2 * c->border,
1611 th - 2 * c->border);
1612 else
1613 tileresize(c, x, ty, w - 2 * c->border,
1614 th - 2 * c->border);
1615 if(w != tw)
1616 x = c->x + c->w + 2 * c->border;
1617 }
1618}
1619
1620unsigned int
1621tilemaster(void) {
1622 unsigned int n;
1623 Client *c, *mc;
1624
1625 for(n = 0, mc = c = nexttiled(clients); c; c = nexttiled(c->next))
1626 n++;
1627 if(n == 0)
1628 return 0;
1629 if(n == 1)
1630 tileresize(mc, mox, moy, mow - 2 * mc->border, moh - 2 * mc->border);
1631 else
1632 tileresize(mc, mx, my, mw - 2 * mc->border, mh - 2 * mc->border);
1633 return n - 1;
1634}
1635
1636void
1637tilev(void) {
1638 tilevstack(tilemaster());
1639}
1640
1641void
1642tilevstack(unsigned int n) {
1643 int i, y, h;
1644 Client *c;
1645
1646 if(n == 0)
1647 return;
1648
1649 y = ty;
1650 h = th / n;
1651 if(h < bh)
1652 h = th;
1653
1654 for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++)
1655 if(i > 0) {
1656 if(i > 1 && i == n) /* remainder */
1657 tileresize(c, tx, y, tw - 2 * c->border,
1658 (ty + th) - y - 2 * c->border);
1659 else
1660 tileresize(c, tx, y, tw - 2 * c->border,
1661 h - 2 * c->border);
1662 if(h != th)
1663 y = c->y + c->h + 2 * c->border;
1664 }
1665}
1666
1667void
1668togglefloating(const char *arg) {
1669 if(!sel)
1670 return;
1671 sel->isfloating = !sel->isfloating;
1672 if(sel->isfloating)
1673 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1674 arrange();
1675}
1676
1677void
1678toggletag(const char *arg) {
1679 unsigned int i, j;
1680
1681 if(!sel)
1682 return;
1683 i = idxoftag(arg);
1684 sel->tags[i] = !sel->tags[i];
1685 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1686 if(j == LENGTH(tags))
1687 sel->tags[i] = True; /* at least one tag must be enabled */
1688 arrange();
1689}
1690
1691void
1692toggleview(const char *arg) {
1693 unsigned int i, j;
1694
1695 i = idxoftag(arg);
1696 seltags[i] = !seltags[i];
1697 for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1698 if(j == LENGTH(tags))
1699 seltags[i] = True; /* at least one tag must be viewed */
1700 arrange();
1701}
1702
1703void
1704unban(Client *c) {
1705 if(!c->isbanned)
1706 return;
1707 XMoveWindow(dpy, c->win, c->x, c->y);
1708 c->isbanned = False;
1709}
1710
1711void
1712unmanage(Client *c) {
1713 XWindowChanges wc;
1714
1715 wc.border_width = c->oldborder;
1716 /* The server grab construct avoids race conditions. */
1717 XGrabServer(dpy);
1718 XSetErrorHandler(xerrordummy);
1719 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1720 detach(c);
1721 detachstack(c);
1722 if(sel == c)
1723 focus(NULL);
1724 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1725 setclientstate(c, WithdrawnState);
1726 free(c->tags);
1727 free(c);
1728 XSync(dpy, False);
1729 XSetErrorHandler(xerror);
1730 XUngrabServer(dpy);
1731 arrange();
1732}
1733
1734void
1735unmapnotify(XEvent *e) {
1736 Client *c;
1737 XUnmapEvent *ev = &e->xunmap;
1738
1739 if((c = getclient(ev->window)))
1740 unmanage(c);
1741}
1742
1743void
1744updatebarpos(void) {
1745
1746 if(dc.drawable != 0)
1747 XFreePixmap(dpy, dc.drawable);
1748 dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
1749 XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
1750}
1751
1752void
1753updatesizehints(Client *c) {
1754 long msize;
1755 XSizeHints size;
1756
1757 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1758 size.flags = PSize;
1759 c->flags = size.flags;
1760 if(c->flags & PBaseSize) {
1761 c->basew = size.base_width;
1762 c->baseh = size.base_height;
1763 }
1764 else if(c->flags & PMinSize) {
1765 c->basew = size.min_width;
1766 c->baseh = size.min_height;
1767 }
1768 else
1769 c->basew = c->baseh = 0;
1770 if(c->flags & PResizeInc) {
1771 c->incw = size.width_inc;
1772 c->inch = size.height_inc;
1773 }
1774 else
1775 c->incw = c->inch = 0;
1776 if(c->flags & PMaxSize) {
1777 c->maxw = size.max_width;
1778 c->maxh = size.max_height;
1779 }
1780 else
1781 c->maxw = c->maxh = 0;
1782 if(c->flags & PMinSize) {
1783 c->minw = size.min_width;
1784 c->minh = size.min_height;
1785 }
1786 else if(c->flags & PBaseSize) {
1787 c->minw = size.base_width;
1788 c->minh = size.base_height;
1789 }
1790 else
1791 c->minw = c->minh = 0;
1792 if(c->flags & PAspect) {
1793 c->minax = size.min_aspect.x;
1794 c->maxax = size.max_aspect.x;
1795 c->minay = size.min_aspect.y;
1796 c->maxay = size.max_aspect.y;
1797 }
1798 else
1799 c->minax = c->maxax = c->minay = c->maxay = 0;
1800 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1801 && c->maxw == c->minw && c->maxh == c->minh);
1802}
1803
1804void
1805updatetitle(Client *c) {
1806 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1807 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1808}
1809
1810void
1811updatewmhints(Client *c) {
1812 XWMHints *wmh;
1813
1814 if((wmh = XGetWMHints(dpy, c->win))) {
1815 if(c == sel)
1816 sel->isurgent = False;
1817 else
1818 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1819 XFree(wmh);
1820 }
1821}
1822
1823
1824void
1825view(const char *arg) {
1826 unsigned int i;
1827
1828 for(i = 0; i < LENGTH(tags); i++)
1829 tmp[i] = (NULL == arg);
1830 tmp[idxoftag(arg)] = True;
1831
1832 if(memcmp(seltags, tmp, TAGSZ) != 0) {
1833 memcpy(prevtags, seltags, TAGSZ);
1834 memcpy(seltags, tmp, TAGSZ);
1835 arrange();
1836 }
1837}
1838
1839void
1840viewprevtag(const char *arg) {
1841
1842 memcpy(tmp, seltags, TAGSZ);
1843 memcpy(seltags, prevtags, TAGSZ);
1844 memcpy(prevtags, tmp, TAGSZ);
1845 arrange();
1846}
1847
1848/* There's no way to check accesses to destroyed windows, thus those cases are
1849 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1850 * default error handler, which may call exit. */
1851int
1852xerror(Display *dpy, XErrorEvent *ee) {
1853 if(ee->error_code == BadWindow
1854 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1855 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1856 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1857 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1858 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1859 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1860 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1861 return 0;
1862 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1863 ee->request_code, ee->error_code);
1864 return xerrorxlib(dpy, ee); /* may call exit */
1865}
1866
1867int
1868xerrordummy(Display *dpy, XErrorEvent *ee) {
1869 return 0;
1870}
1871
1872/* Startup Error handler to check if another window manager
1873 * is already running. */
1874int
1875xerrorstart(Display *dpy, XErrorEvent *ee) {
1876 otherwm = True;
1877 return -1;
1878}
1879
1880void
1881zoom(const char *arg) {
1882 Client *c = sel;
1883
1884 if(!sel || lt->isfloating || sel->isfloating)
1885 return;
1886 if(c == nexttiled(clients))
1887 if(!(c = nexttiled(c->next)))
1888 return;
1889 detach(c);
1890 attach(c);
1891 focus(c);
1892 arrange();
1893}
1894
1895int
1896main(int argc, char *argv[]) {
1897 if(argc == 2 && !strcmp("-v", argv[1]))
1898 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1899 else if(argc != 1)
1900 eprint("usage: dwm [-v]\n");
1901
1902 setlocale(LC_CTYPE, "");
1903 if(!(dpy = XOpenDisplay(0)))
1904 eprint("dwm: cannot open display\n");
1905
1906 checkotherwm();
1907 setup();
1908 scan();
1909 run();
1910 cleanup();
1911
1912 XCloseDisplay(dpy);
1913 return 0;
1914}