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 a bit array to indicate the tags of a
20 * 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#ifdef XINERAMA
43#include <X11/extensions/Xinerama.h>
44#endif
45
46/* macros */
47#define MAX(a, b) ((a) > (b) ? (a) : (b))
48#define MIN(a, b) ((a) < (b) ? (a) : (b))
49#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
50#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
51#define LENGTH(x) (sizeof x / sizeof x[0])
52#define MAXTAGLEN 16
53#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
54#define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
55#define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height)
56
57/* enums */
58enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
61enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
62
63/* typedefs */
64typedef unsigned int uint;
65typedef unsigned long ulong;
66typedef struct Client Client;
67struct Client {
68 char name[256];
69 int x, y, w, h;
70 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
71 int minax, maxax, minay, maxay;
72 int bw, oldbw;
73 Bool isbanned, isfixed, isfloating, ismoved, isurgent;
74 uint tags;
75 Client *next;
76 Client *prev;
77 Client *snext;
78 Window win;
79};
80
81typedef struct {
82 int x, y, w, h;
83 ulong norm[ColLast];
84 ulong sel[ColLast];
85 Drawable drawable;
86 GC gc;
87 struct {
88 int ascent;
89 int descent;
90 int height;
91 XFontSet set;
92 XFontStruct *xfont;
93 } font;
94} DC; /* draw context */
95
96typedef struct {
97 uint mod;
98 KeySym keysym;
99 void (*func)(const void *arg);
100 const void *arg;
101} Key;
102
103typedef struct {
104 const char *symbol;
105 void (*arrange)(void);
106} Layout;
107
108typedef struct {
109 const char *class;
110 const char *instance;
111 const char *title;
112 uint tags;
113 Bool isfloating;
114} Rule;
115
116/* function declarations */
117void applyrules(Client *c);
118void arrange(void);
119void attach(Client *c);
120void attachstack(Client *c);
121void buttonpress(XEvent *e);
122void checkotherwm(void);
123void cleanup(void);
124void configure(Client *c);
125void configurenotify(XEvent *e);
126void configurerequest(XEvent *e);
127void destroynotify(XEvent *e);
128void detach(Client *c);
129void detachstack(Client *c);
130void drawbar(void);
131void drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]);
132void drawtext(const char *text, ulong col[ColLast], Bool invert);
133void enternotify(XEvent *e);
134void eprint(const char *errstr, ...);
135void expose(XEvent *e);
136void focus(Client *c);
137void focusin(XEvent *e);
138void focusnext(const void *arg);
139void focusprev(const void *arg);
140Client *getclient(Window w);
141ulong getcolor(const char *colstr);
142long getstate(Window w);
143Bool gettextprop(Window w, Atom atom, char *text, uint size);
144void grabbuttons(Client *c, Bool focused);
145void grabkeys(void);
146void initfont(const char *fontstr);
147Bool isoccupied(uint t);
148Bool isprotodel(Client *c);
149Bool isurgent(uint t);
150void keypress(XEvent *e);
151void killclient(const void *arg);
152void manage(Window w, XWindowAttributes *wa);
153void mappingnotify(XEvent *e);
154void maprequest(XEvent *e);
155void movemouse(Client *c);
156Client *nexttiled(Client *c);
157void propertynotify(XEvent *e);
158void quit(const void *arg);
159void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
160void resizemouse(Client *c);
161void restack(void);
162void run(void);
163void scan(void);
164void setclientstate(Client *c, long state);
165void setmfact(const void *arg);
166void setup(void);
167void spawn(const void *arg);
168void tag(const void *arg);
169int textnw(const char *text, uint len);
170void tile(void);
171void togglebar(const void *arg);
172void togglefloating(const void *arg);
173void togglelayout(const void *arg);
174void togglemax(const void *arg);
175void toggletag(const void *arg);
176void toggleview(const void *arg);
177void unmanage(Client *c);
178void unmapnotify(XEvent *e);
179void updatebar(void);
180void updategeom(void);
181void updatesizehints(Client *c);
182void updatetitle(Client *c);
183void updatewmhints(Client *c);
184void view(const void *arg);
185int xerror(Display *dpy, XErrorEvent *ee);
186int xerrordummy(Display *dpy, XErrorEvent *ee);
187int xerrorstart(Display *dpy, XErrorEvent *ee);
188void zoom(const void *arg);
189
190/* variables */
191char stext[256];
192int screen, sx, sy, sw, sh;
193int by, bh, blw, wx, wy, ww, wh;
194uint seltags = 0;
195int (*xerrorxlib)(Display *, XErrorEvent *);
196uint numlockmask = 0;
197void (*handler[LASTEvent]) (XEvent *) = {
198 [ButtonPress] = buttonpress,
199 [ConfigureRequest] = configurerequest,
200 [ConfigureNotify] = configurenotify,
201 [DestroyNotify] = destroynotify,
202 [EnterNotify] = enternotify,
203 [Expose] = expose,
204 [FocusIn] = focusin,
205 [KeyPress] = keypress,
206 [MappingNotify] = mappingnotify,
207 [MapRequest] = maprequest,
208 [PropertyNotify] = propertynotify,
209 [UnmapNotify] = unmapnotify
210};
211Atom wmatom[WMLast], netatom[NetLast];
212Bool ismax = False;
213Bool otherwm, readin;
214Bool running = True;
215uint tagset[] = {1, 1}; /* after start, first tag is selected */
216Client *clients = NULL;
217Client *sel = NULL;
218Client *stack = NULL;
219Cursor cursor[CurLast];
220Display *dpy;
221DC dc = {0};
222Layout layouts[];
223Layout *lt = layouts;
224Window root, barwin;
225
226/* configuration, allows nested code to access above variables */
227#include "config.h"
228
229/* compile-time check if all tags fit into an uint bit array. */
230struct NumTags { char limitexceeded[sizeof(uint) * 8 < LENGTH(tags) ? -1 : 1]; };
231
232/* function implementations */
233void
234applyrules(Client *c) {
235 uint i;
236 Rule *r;
237 XClassHint ch = { 0 };
238
239 /* rule matching */
240 XGetClassHint(dpy, c->win, &ch);
241 for(i = 0; i < LENGTH(rules); i++) {
242 r = &rules[i];
243 if((!r->title || strstr(c->name, r->title))
244 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
245 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
246 c->isfloating = r->isfloating;
247 c->tags |= r->tags & TAGMASK;
248 }
249 }
250 if(ch.res_class)
251 XFree(ch.res_class);
252 if(ch.res_name)
253 XFree(ch.res_name);
254 if(!c->tags)
255 c->tags = tagset[seltags];
256}
257
258void
259arrange(void) {
260 Client *c;
261
262 for(c = clients; c; c = c->next)
263 if(c->tags & tagset[seltags]) { /* is visible */
264 if(ismax && !c->isfixed) {
265 XMoveResizeWindow(dpy, c->win, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
266 c->ismoved = True;
267 }
268 else if(!lt->arrange || c->isfloating)
269 resize(c, c->x, c->y, c->w, c->h, True);
270 c->isbanned = False;
271 }
272 else if(!c->isbanned) {
273 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
274 c->isbanned = c->ismoved = True;
275 }
276
277 focus(NULL);
278 if(lt->arrange && !ismax)
279 lt->arrange();
280 restack();
281}
282
283void
284attach(Client *c) {
285 if(clients)
286 clients->prev = c;
287 c->next = clients;
288 clients = c;
289}
290
291void
292attachstack(Client *c) {
293 c->snext = stack;
294 stack = c;
295}
296
297void
298buttonpress(XEvent *e) {
299 uint i, mask;
300 int x;
301 Client *c;
302 XButtonPressedEvent *ev = &e->xbutton;
303
304 if(ev->window == barwin) {
305 x = 0;
306 for(i = 0; i < LENGTH(tags); i++) {
307 x += TEXTW(tags[i]);
308 if(ev->x < x) {
309 mask = 1 << i;
310 if(ev->button == Button1) {
311 if(ev->state & MODKEY)
312 tag(&mask);
313 else
314 view(&mask);
315 }
316 else if(ev->button == Button3) {
317 if(ev->state & MODKEY)
318 toggletag(&mask);
319 else
320 toggleview(&mask);
321 }
322 return;
323 }
324 }
325 if(ev->x < x + blw) {
326 if(ev->button == Button1)
327 togglelayout(NULL);
328 else if(ev->button == Button3)
329 togglemax(NULL);
330 }
331 }
332 else if((c = getclient(ev->window))) {
333 focus(c);
334 if(CLEANMASK(ev->state) != MODKEY || (ismax && !c->isfixed))
335 return;
336 if(ev->button == Button1)
337 movemouse(c);
338 else if(ev->button == Button2)
339 togglefloating(NULL);
340 else if(ev->button == Button3 && !c->isfixed)
341 resizemouse(c);
342 }
343}
344
345void
346checkotherwm(void) {
347 otherwm = False;
348 XSetErrorHandler(xerrorstart);
349
350 /* this causes an error if some other window manager is running */
351 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
352 XSync(dpy, False);
353 if(otherwm)
354 eprint("dwm: another window manager is already running\n");
355 XSetErrorHandler(NULL);
356 xerrorxlib = XSetErrorHandler(xerror);
357 XSync(dpy, False);
358}
359
360void
361cleanup(void) {
362 close(STDIN_FILENO);
363 view((uint[]){~0});
364 while(stack)
365 unmanage(stack);
366 if(dc.font.set)
367 XFreeFontSet(dpy, dc.font.set);
368 else
369 XFreeFont(dpy, dc.font.xfont);
370 XUngrabKey(dpy, AnyKey, AnyModifier, root);
371 XFreePixmap(dpy, dc.drawable);
372 XFreeGC(dpy, dc.gc);
373 XFreeCursor(dpy, cursor[CurNormal]);
374 XFreeCursor(dpy, cursor[CurResize]);
375 XFreeCursor(dpy, cursor[CurMove]);
376 XDestroyWindow(dpy, barwin);
377 XSync(dpy, False);
378 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
379}
380
381void
382configure(Client *c) {
383 XConfigureEvent ce;
384
385 ce.type = ConfigureNotify;
386 ce.display = dpy;
387 ce.event = c->win;
388 ce.window = c->win;
389 ce.x = c->x;
390 ce.y = c->y;
391 ce.width = c->w;
392 ce.height = c->h;
393 ce.border_width = c->bw;
394 ce.above = None;
395 ce.override_redirect = False;
396 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
397}
398
399void
400configurenotify(XEvent *e) {
401 XConfigureEvent *ev = &e->xconfigure;
402
403 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
404 sw = ev->width;
405 sh = ev->height;
406 updategeom();
407 updatebar();
408 arrange();
409 }
410}
411
412void
413configurerequest(XEvent *e) {
414 Client *c;
415 XConfigureRequestEvent *ev = &e->xconfigurerequest;
416 XWindowChanges wc;
417
418 if((c = getclient(ev->window))) {
419 if(ev->value_mask & CWBorderWidth)
420 c->bw = ev->border_width;
421 if(ismax && !c->isbanned && !c->isfixed)
422 XMoveResizeWindow(dpy, c->win, wx, wy, ww - 2 * c->bw, wh + 2 * c->bw);
423 else if(c->isfloating || !lt->arrange) {
424 if(ev->value_mask & CWX)
425 c->x = sx + ev->x;
426 if(ev->value_mask & CWY)
427 c->y = sy + ev->y;
428 if(ev->value_mask & CWWidth)
429 c->w = ev->width;
430 if(ev->value_mask & CWHeight)
431 c->h = ev->height;
432 if((c->x - sx + c->w) > sw && c->isfloating)
433 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
434 if((c->y - sy + c->h) > sh && c->isfloating)
435 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
436 if((ev->value_mask & (CWX|CWY))
437 && !(ev->value_mask & (CWWidth|CWHeight)))
438 configure(c);
439 if(!c->isbanned)
440 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
441 }
442 else
443 configure(c);
444 }
445 else {
446 wc.x = ev->x;
447 wc.y = ev->y;
448 wc.width = ev->width;
449 wc.height = ev->height;
450 wc.border_width = ev->border_width;
451 wc.sibling = ev->above;
452 wc.stack_mode = ev->detail;
453 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
454 }
455 XSync(dpy, False);
456}
457
458void
459destroynotify(XEvent *e) {
460 Client *c;
461 XDestroyWindowEvent *ev = &e->xdestroywindow;
462
463 if((c = getclient(ev->window)))
464 unmanage(c);
465}
466
467void
468detach(Client *c) {
469 if(c->prev)
470 c->prev->next = c->next;
471 if(c->next)
472 c->next->prev = c->prev;
473 if(c == clients)
474 clients = c->next;
475 c->next = c->prev = NULL;
476}
477
478void
479detachstack(Client *c) {
480 Client **tc;
481
482 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
483 *tc = c->snext;
484}
485
486void
487drawbar(void) {
488 int i, x;
489 Client *c;
490
491 dc.x = 0;
492 for(c = stack; c && c->isbanned; c = c->snext);
493 for(i = 0; i < LENGTH(tags); i++) {
494 dc.w = TEXTW(tags[i]);
495 if(tagset[seltags] & 1 << i) {
496 drawtext(tags[i], dc.sel, isurgent(i));
497 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.sel);
498 }
499 else {
500 drawtext(tags[i], dc.norm, isurgent(i));
501 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.norm);
502 }
503 dc.x += dc.w;
504 }
505 if(blw > 0) {
506 dc.w = blw;
507 drawtext(lt->symbol, dc.norm, ismax);
508 x = dc.x + dc.w;
509 }
510 else
511 x = dc.x;
512 dc.w = TEXTW(stext);
513 dc.x = ww - dc.w;
514 if(dc.x < x) {
515 dc.x = x;
516 dc.w = ww - x;
517 }
518 drawtext(stext, dc.norm, False);
519 if((dc.w = dc.x - x) > bh) {
520 dc.x = x;
521 if(c) {
522 drawtext(c->name, dc.sel, False);
523 drawsquare(c->isfixed, c->isfloating, False, dc.sel);
524 }
525 else
526 drawtext(NULL, dc.norm, False);
527 }
528 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
529 XSync(dpy, False);
530}
531
532void
533drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]) {
534 int x;
535 XGCValues gcv;
536 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
537
538 gcv.foreground = col[invert ? ColBG : ColFG];
539 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
540 x = (dc.font.ascent + dc.font.descent + 2) / 4;
541 r.x = dc.x + 1;
542 r.y = dc.y + 1;
543 if(filled) {
544 r.width = r.height = x + 1;
545 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
546 }
547 else if(empty) {
548 r.width = r.height = x;
549 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
550 }
551}
552
553void
554drawtext(const char *text, ulong col[ColLast], Bool invert) {
555 int i, x, y, h, len, olen;
556 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
557 char buf[256];
558
559 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
560 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
561 if(!text)
562 return;
563 olen = strlen(text);
564 len = MIN(olen, sizeof buf);
565 memcpy(buf, text, len);
566 h = dc.font.ascent + dc.font.descent;
567 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
568 x = dc.x + (h / 2);
569 /* shorten text if necessary */
570 for(; len && (i = textnw(buf, len)) > dc.w - h; len--);
571 if(!len)
572 return;
573 if(len < olen)
574 for(i = len; i >= MAX(0, len - 3); buf[i--] = '.');
575 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
576 if(dc.font.set)
577 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
578 else
579 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
580}
581
582void
583enternotify(XEvent *e) {
584 Client *c;
585 XCrossingEvent *ev = &e->xcrossing;
586
587 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
588 return;
589 if((c = getclient(ev->window)))
590 focus(c);
591 else
592 focus(NULL);
593}
594
595void
596eprint(const char *errstr, ...) {
597 va_list ap;
598
599 va_start(ap, errstr);
600 vfprintf(stderr, errstr, ap);
601 va_end(ap);
602 exit(EXIT_FAILURE);
603}
604
605void
606expose(XEvent *e) {
607 XExposeEvent *ev = &e->xexpose;
608
609 if(ev->count == 0 && (ev->window == barwin))
610 drawbar();
611}
612
613void
614focus(Client *c) {
615 if(!c || c->isbanned)
616 for(c = stack; c && c->isbanned; c = c->snext);
617 if(sel && sel != c) {
618 grabbuttons(sel, False);
619 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
620 }
621 if(c) {
622 detachstack(c);
623 attachstack(c);
624 grabbuttons(c, True);
625 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
626 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
627 }
628 else
629 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
630 sel = c;
631 drawbar();
632}
633
634void
635focusin(XEvent *e) { /* there are some broken focus acquiring clients */
636 XFocusChangeEvent *ev = &e->xfocus;
637
638 if(sel && ev->window != sel->win)
639 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
640}
641
642void
643focusnext(const void *arg) {
644 Client *c;
645
646 if(!sel)
647 return;
648 for(c = sel->next; c && c->isbanned; c = c->next);
649 if(!c)
650 for(c = clients; c && c->isbanned; c = c->next);
651 if(c) {
652 focus(c);
653 restack();
654 }
655}
656
657void
658focusprev(const void *arg) {
659 Client *c;
660
661 if(!sel)
662 return;
663 for(c = sel->prev; c && c->isbanned; c = c->prev);
664 if(!c) {
665 for(c = clients; c && c->next; c = c->next);
666 for(; c && c->isbanned; c = c->prev);
667 }
668 if(c) {
669 focus(c);
670 restack();
671 }
672}
673
674Client *
675getclient(Window w) {
676 Client *c;
677
678 for(c = clients; c && c->win != w; c = c->next);
679 return c;
680}
681
682ulong
683getcolor(const char *colstr) {
684 Colormap cmap = DefaultColormap(dpy, screen);
685 XColor color;
686
687 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
688 eprint("error, cannot allocate color '%s'\n", colstr);
689 return color.pixel;
690}
691
692long
693getstate(Window w) {
694 int format, status;
695 long result = -1;
696 unsigned char *p = NULL;
697 ulong n, extra;
698 Atom real;
699
700 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
701 &real, &format, &n, &extra, (unsigned char **)&p);
702 if(status != Success)
703 return -1;
704 if(n != 0)
705 result = *p;
706 XFree(p);
707 return result;
708}
709
710Bool
711gettextprop(Window w, Atom atom, char *text, uint size) {
712 char **list = NULL;
713 int n;
714 XTextProperty name;
715
716 if(!text || size == 0)
717 return False;
718 text[0] = '\0';
719 XGetTextProperty(dpy, w, &name, atom);
720 if(!name.nitems)
721 return False;
722 if(name.encoding == XA_STRING)
723 strncpy(text, (char *)name.value, size - 1);
724 else {
725 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
726 && n > 0 && *list) {
727 strncpy(text, *list, size - 1);
728 XFreeStringList(list);
729 }
730 }
731 text[size - 1] = '\0';
732 XFree(name.value);
733 return True;
734}
735
736void
737grabbuttons(Client *c, Bool focused) {
738 int i, j;
739 uint buttons[] = { Button1, Button2, Button3 };
740 uint modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask, MODKEY|numlockmask|LockMask };
741
742 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
743 if(focused)
744 for(i = 0; i < LENGTH(buttons); i++)
745 for(j = 0; j < LENGTH(modifiers); j++)
746 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
747 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
748 else
749 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
750 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
751}
752
753void
754grabkeys(void) {
755 uint i, j;
756 KeyCode code;
757 XModifierKeymap *modmap;
758
759 /* init modifier map */
760 modmap = XGetModifierMapping(dpy);
761 for(i = 0; i < 8; i++)
762 for(j = 0; j < modmap->max_keypermod; j++) {
763 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
764 numlockmask = (1 << i);
765 }
766 XFreeModifiermap(modmap);
767
768 XUngrabKey(dpy, AnyKey, AnyModifier, root);
769 for(i = 0; i < LENGTH(keys); i++) {
770 code = XKeysymToKeycode(dpy, keys[i].keysym);
771 XGrabKey(dpy, code, keys[i].mod, root, True,
772 GrabModeAsync, GrabModeAsync);
773 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
774 GrabModeAsync, GrabModeAsync);
775 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
776 GrabModeAsync, GrabModeAsync);
777 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
778 GrabModeAsync, GrabModeAsync);
779 }
780}
781
782void
783initfont(const char *fontstr) {
784 char *def, **missing;
785 int i, n;
786
787 missing = NULL;
788 if(dc.font.set)
789 XFreeFontSet(dpy, dc.font.set);
790 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
791 if(missing) {
792 while(n--)
793 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
794 XFreeStringList(missing);
795 }
796 if(dc.font.set) {
797 XFontSetExtents *font_extents;
798 XFontStruct **xfonts;
799 char **font_names;
800 dc.font.ascent = dc.font.descent = 0;
801 font_extents = XExtentsOfFontSet(dc.font.set);
802 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
803 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
804 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
805 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
806 xfonts++;
807 }
808 }
809 else {
810 if(dc.font.xfont)
811 XFreeFont(dpy, dc.font.xfont);
812 dc.font.xfont = NULL;
813 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
814 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
815 eprint("error, cannot load font: '%s'\n", fontstr);
816 dc.font.ascent = dc.font.xfont->ascent;
817 dc.font.descent = dc.font.xfont->descent;
818 }
819 dc.font.height = dc.font.ascent + dc.font.descent;
820}
821
822Bool
823isoccupied(uint t) {
824 Client *c;
825
826 for(c = clients; c; c = c->next)
827 if(c->tags & 1 << t)
828 return True;
829 return False;
830}
831
832Bool
833isprotodel(Client *c) {
834 int i, n;
835 Atom *protocols;
836 Bool ret = False;
837
838 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
839 for(i = 0; !ret && i < n; i++)
840 if(protocols[i] == wmatom[WMDelete])
841 ret = True;
842 XFree(protocols);
843 }
844 return ret;
845}
846
847Bool
848isurgent(uint t) {
849 Client *c;
850
851 for(c = clients; c; c = c->next)
852 if(c->isurgent && c->tags & 1 << t)
853 return True;
854 return False;
855}
856
857void
858keypress(XEvent *e) {
859 uint i;
860 KeySym keysym;
861 XKeyEvent *ev;
862
863 ev = &e->xkey;
864 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
865 for(i = 0; i < LENGTH(keys); i++)
866 if(keysym == keys[i].keysym
867 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
868 && keys[i].func)
869 keys[i].func(keys[i].arg);
870}
871
872void
873killclient(const void *arg) {
874 XEvent ev;
875
876 if(!sel)
877 return;
878 if(isprotodel(sel)) {
879 ev.type = ClientMessage;
880 ev.xclient.window = sel->win;
881 ev.xclient.message_type = wmatom[WMProtocols];
882 ev.xclient.format = 32;
883 ev.xclient.data.l[0] = wmatom[WMDelete];
884 ev.xclient.data.l[1] = CurrentTime;
885 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
886 }
887 else
888 XKillClient(dpy, sel->win);
889}
890
891void
892manage(Window w, XWindowAttributes *wa) {
893 Client *c, *t = NULL;
894 Status rettrans;
895 Window trans;
896 XWindowChanges wc;
897
898 if(!(c = calloc(1, sizeof(Client))))
899 eprint("fatal: could not calloc() %u bytes\n", sizeof(Client));
900 c->win = w;
901
902 /* geometry */
903 c->x = wa->x;
904 c->y = wa->y;
905 c->w = wa->width;
906 c->h = wa->height;
907 c->oldbw = wa->border_width;
908 if(c->w == sw && c->h == sh) {
909 c->x = sx;
910 c->y = sy;
911 c->bw = wa->border_width;
912 }
913 else {
914 if(c->x + c->w + 2 * c->bw > sx + sw)
915 c->x = sx + sw - c->w - 2 * c->bw;
916 if(c->y + c->h + 2 * c->bw > sy + sh)
917 c->y = sy + sh - c->h - 2 * c->bw;
918 c->x = MAX(c->x, sx);
919 c->y = MAX(c->y, by == 0 ? bh : sy);
920 c->bw = borderpx;
921 }
922
923 wc.border_width = c->bw;
924 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
925 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
926 configure(c); /* propagates border_width, if size doesn't change */
927 updatesizehints(c);
928 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
929 grabbuttons(c, False);
930 updatetitle(c);
931 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
932 for(t = clients; t && t->win != trans; t = t->next);
933 if(t)
934 c->tags = t->tags;
935 else
936 applyrules(c);
937 if(!c->isfloating)
938 c->isfloating = (rettrans == Success) || c->isfixed;
939 if(c->isfloating)
940 XRaiseWindow(dpy, c->win);
941 attach(c);
942 attachstack(c);
943 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
944 XMapWindow(dpy, c->win);
945 setclientstate(c, NormalState);
946 arrange();
947}
948
949void
950mappingnotify(XEvent *e) {
951 XMappingEvent *ev = &e->xmapping;
952
953 XRefreshKeyboardMapping(ev);
954 if(ev->request == MappingKeyboard)
955 grabkeys();
956}
957
958void
959maprequest(XEvent *e) {
960 static XWindowAttributes wa;
961 XMapRequestEvent *ev = &e->xmaprequest;
962
963 if(!XGetWindowAttributes(dpy, ev->window, &wa))
964 return;
965 if(wa.override_redirect)
966 return;
967 if(!getclient(ev->window))
968 manage(ev->window, &wa);
969}
970
971void
972movemouse(Client *c) {
973 int x1, y1, ocx, ocy, di, nx, ny;
974 uint dui;
975 Window dummy;
976 XEvent ev;
977
978 restack();
979 ocx = nx = c->x;
980 ocy = ny = c->y;
981 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
982 None, cursor[CurMove], CurrentTime) != GrabSuccess)
983 return;
984 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
985 for(;;) {
986 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
987 switch (ev.type) {
988 case ButtonRelease:
989 XUngrabPointer(dpy, CurrentTime);
990 return;
991 case ConfigureRequest:
992 case Expose:
993 case MapRequest:
994 handler[ev.type](&ev);
995 break;
996 case MotionNotify:
997 XSync(dpy, False);
998 nx = ocx + (ev.xmotion.x - x1);
999 ny = ocy + (ev.xmotion.y - y1);
1000 if(snap && nx >= wx && nx <= wx + ww
1001 && ny >= wy && ny <= wy + wh) {
1002 if(abs(wx - nx) < snap)
1003 nx = wx;
1004 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
1005 nx = wx + ww - c->w - 2 * c->bw;
1006 if(abs(wy - ny) < snap)
1007 ny = wy;
1008 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
1009 ny = wy + wh - c->h - 2 * c->bw;
1010 if(!c->isfloating && lt->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1011 togglefloating(NULL);
1012 }
1013 if(!lt->arrange || c->isfloating)
1014 resize(c, nx, ny, c->w, c->h, False);
1015 break;
1016 }
1017 }
1018}
1019
1020Client *
1021nexttiled(Client *c) {
1022 for(; c && (c->isfloating || c->isbanned); c = c->next);
1023 return c;
1024}
1025
1026void
1027propertynotify(XEvent *e) {
1028 Client *c;
1029 Window trans;
1030 XPropertyEvent *ev = &e->xproperty;
1031
1032 if(ev->state == PropertyDelete)
1033 return; /* ignore */
1034 if((c = getclient(ev->window))) {
1035 switch (ev->atom) {
1036 default: break;
1037 case XA_WM_TRANSIENT_FOR:
1038 XGetTransientForHint(dpy, c->win, &trans);
1039 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1040 arrange();
1041 break;
1042 case XA_WM_NORMAL_HINTS:
1043 updatesizehints(c);
1044 break;
1045 case XA_WM_HINTS:
1046 updatewmhints(c);
1047 drawbar();
1048 break;
1049 }
1050 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1051 updatetitle(c);
1052 if(c == sel)
1053 drawbar();
1054 }
1055 }
1056}
1057
1058void
1059quit(const void *arg) {
1060 readin = running = False;
1061}
1062
1063void
1064resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1065 XWindowChanges wc;
1066
1067 if(sizehints) {
1068 /* set minimum possible */
1069 w = MAX(1, w);
1070 h = MAX(1, h);
1071
1072 /* temporarily remove base dimensions */
1073 w -= c->basew;
1074 h -= c->baseh;
1075
1076 /* adjust for aspect limits */
1077 if(c->minax != c->maxax && c->minay != c->maxay
1078 && c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0) {
1079 if(w * c->maxay > h * c->maxax)
1080 w = h * c->maxax / c->maxay;
1081 else if(w * c->minay < h * c->minax)
1082 h = w * c->minay / c->minax;
1083 }
1084
1085 /* adjust for increment value */
1086 if(c->incw)
1087 w -= w % c->incw;
1088 if(c->inch)
1089 h -= h % c->inch;
1090
1091 /* restore base dimensions */
1092 w += c->basew;
1093 h += c->baseh;
1094
1095 w = MAX(w, c->minw);
1096 h = MAX(h, c->minh);
1097
1098 if (c->maxw)
1099 w = MIN(w, c->maxw);
1100
1101 if (c->maxh)
1102 h = MIN(h, c->maxh);
1103 }
1104 if(w <= 0 || h <= 0)
1105 return;
1106 if(x > sx + sw)
1107 x = sw - w - 2 * c->bw;
1108 if(y > sy + sh)
1109 y = sh - h - 2 * c->bw;
1110 if(x + w + 2 * c->bw < sx)
1111 x = sx;
1112 if(y + h + 2 * c->bw < sy)
1113 y = sy;
1114 if(h < bh)
1115 h = bh;
1116 if(w < bh)
1117 w = bh;
1118 if(c->x != x || c->y != y || c->w != w || c->h != h || c->ismoved) {
1119 c->ismoved = False;
1120 c->x = wc.x = x;
1121 c->y = wc.y = y;
1122 c->w = wc.width = w;
1123 c->h = wc.height = h;
1124 wc.border_width = c->bw;
1125 XConfigureWindow(dpy, c->win,
1126 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1127 configure(c);
1128 XSync(dpy, False);
1129 }
1130}
1131
1132void
1133resizemouse(Client *c) {
1134 int ocx, ocy;
1135 int nw, nh;
1136 XEvent ev;
1137
1138 restack();
1139 ocx = c->x;
1140 ocy = c->y;
1141 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1142 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1143 return;
1144 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1145 for(;;) {
1146 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1147 switch(ev.type) {
1148 case ButtonRelease:
1149 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1150 c->w + c->bw - 1, c->h + c->bw - 1);
1151 XUngrabPointer(dpy, CurrentTime);
1152 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1153 return;
1154 case ConfigureRequest:
1155 case Expose:
1156 case MapRequest:
1157 handler[ev.type](&ev);
1158 break;
1159 case MotionNotify:
1160 XSync(dpy, False);
1161 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1162 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1163
1164 if(snap && nw >= wx && nw <= wx + ww
1165 && nh >= wy && nh <= wy + wh) {
1166 if(!c->isfloating && lt->arrange
1167 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1168 togglefloating(NULL);
1169 }
1170 if(!lt->arrange || c->isfloating)
1171 resize(c, c->x, c->y, nw, nh, True);
1172 break;
1173 }
1174 }
1175}
1176
1177void
1178restack(void) {
1179 Client *c;
1180 XEvent ev;
1181 XWindowChanges wc;
1182
1183 drawbar();
1184 if(!sel)
1185 return;
1186 if(ismax || sel->isfloating || !lt->arrange)
1187 XRaiseWindow(dpy, sel->win);
1188 if(!ismax && lt->arrange) {
1189 wc.stack_mode = Below;
1190 wc.sibling = barwin;
1191 for(c = stack; c; c = c->snext)
1192 if(!c->isfloating && !c->isbanned) {
1193 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1194 wc.sibling = c->win;
1195 }
1196 }
1197 XSync(dpy, False);
1198 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1199}
1200
1201void
1202run(void) {
1203 char *p;
1204 char sbuf[sizeof stext];
1205 fd_set rd;
1206 int r, xfd;
1207 uint len, offset;
1208 XEvent ev;
1209
1210 /* main event loop, also reads status text from stdin */
1211 XSync(dpy, False);
1212 xfd = ConnectionNumber(dpy);
1213 readin = True;
1214 offset = 0;
1215 len = sizeof stext - 1;
1216 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1217 while(running) {
1218 FD_ZERO(&rd);
1219 if(readin)
1220 FD_SET(STDIN_FILENO, &rd);
1221 FD_SET(xfd, &rd);
1222 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1223 if(errno == EINTR)
1224 continue;
1225 eprint("select failed\n");
1226 }
1227 if(FD_ISSET(STDIN_FILENO, &rd)) {
1228 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1229 case -1:
1230 strncpy(stext, strerror(errno), len);
1231 readin = False;
1232 break;
1233 case 0:
1234 strncpy(stext, "EOF", 4);
1235 readin = False;
1236 break;
1237 default:
1238 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1239 if(*p == '\n' || *p == '\0') {
1240 *p = '\0';
1241 strncpy(stext, sbuf, len);
1242 p += r - 1; /* p is sbuf + offset + r - 1 */
1243 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1244 offset = r;
1245 if(r)
1246 memmove(sbuf, p - r + 1, r);
1247 break;
1248 }
1249 break;
1250 }
1251 drawbar();
1252 }
1253 while(XPending(dpy)) {
1254 XNextEvent(dpy, &ev);
1255 if(handler[ev.type])
1256 (handler[ev.type])(&ev); /* call handler */
1257 }
1258 }
1259}
1260
1261void
1262scan(void) {
1263 uint i, num;
1264 Window *wins, d1, d2;
1265 XWindowAttributes wa;
1266
1267 wins = NULL;
1268 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1269 for(i = 0; i < num; i++) {
1270 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1271 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1272 continue;
1273 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1274 manage(wins[i], &wa);
1275 }
1276 for(i = 0; i < num; i++) { /* now the transients */
1277 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1278 continue;
1279 if(XGetTransientForHint(dpy, wins[i], &d1)
1280 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1281 manage(wins[i], &wa);
1282 }
1283 }
1284 if(wins)
1285 XFree(wins);
1286}
1287
1288void
1289setclientstate(Client *c, long state) {
1290 long data[] = {state, None};
1291
1292 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1293 PropModeReplace, (unsigned char *)data, 2);
1294}
1295
1296/* arg > 1.0 will set mfact absolutly */
1297void
1298setmfact(const void *arg) {
1299 double d = *((double*) arg);
1300
1301 if(!d || !lt->arrange)
1302 return;
1303 d = d < 1.0 ? d + mfact : d - 1.0;
1304 if(d < 0.1 || d > 0.9)
1305 return;
1306 mfact = d;
1307 arrange();
1308}
1309
1310void
1311setup(void) {
1312 uint i;
1313 int w;
1314 XSetWindowAttributes wa;
1315
1316 /* init screen */
1317 screen = DefaultScreen(dpy);
1318 root = RootWindow(dpy, screen);
1319 initfont(FONT);
1320 sx = 0;
1321 sy = 0;
1322 sw = DisplayWidth(dpy, screen);
1323 sh = DisplayHeight(dpy, screen);
1324 bh = dc.font.height + 2;
1325 updategeom();
1326
1327 /* init atoms */
1328 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1329 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1330 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1331 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1332 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1333 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1334
1335 /* init cursors */
1336 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1337 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1338 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1339
1340 /* init appearance */
1341 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1342 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1343 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1344 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1345 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1346 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1347 initfont(FONT);
1348 dc.h = bh;
1349 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1350 dc.gc = XCreateGC(dpy, root, 0, 0);
1351 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1352 if(!dc.font.set)
1353 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1354
1355 /* init bar */
1356 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1357 w = TEXTW(layouts[i].symbol);
1358 blw = MAX(blw, w);
1359 }
1360
1361 wa.override_redirect = 1;
1362 wa.background_pixmap = ParentRelative;
1363 wa.event_mask = ButtonPressMask|ExposureMask;
1364
1365 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1366 CopyFromParent, DefaultVisual(dpy, screen),
1367 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1368 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1369 XMapRaised(dpy, barwin);
1370 strcpy(stext, "dwm-"VERSION);
1371 drawbar();
1372
1373 /* EWMH support per view */
1374 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1375 PropModeReplace, (unsigned char *) netatom, NetLast);
1376
1377 /* select for events */
1378 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1379 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1380 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1381 XSelectInput(dpy, root, wa.event_mask);
1382
1383
1384 /* grab keys */
1385 grabkeys();
1386}
1387
1388void
1389spawn(const void *arg) {
1390 static char *shell = NULL;
1391
1392 if(!shell && !(shell = getenv("SHELL")))
1393 shell = "/bin/sh";
1394 /* The double-fork construct avoids zombie processes and keeps the code
1395 * clean from stupid signal handlers. */
1396 if(fork() == 0) {
1397 if(fork() == 0) {
1398 if(dpy)
1399 close(ConnectionNumber(dpy));
1400 setsid();
1401 execl(shell, shell, "-c", (char *)arg, (char *)NULL);
1402 fprintf(stderr, "dwm: execl '%s -c %s'", shell, (char *)arg);
1403 perror(" failed");
1404 }
1405 exit(0);
1406 }
1407 wait(0);
1408}
1409
1410void
1411tag(const void *arg) {
1412 if(sel && *(int *)arg & TAGMASK) {
1413 sel->tags = *(int *)arg & TAGMASK;
1414 arrange();
1415 }
1416}
1417
1418int
1419textnw(const char *text, uint len) {
1420 XRectangle r;
1421
1422 if(dc.font.set) {
1423 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1424 return r.width;
1425 }
1426 return XTextWidth(dc.font.xfont, text, len);
1427}
1428
1429void
1430tile(void) {
1431 int x, y, h, w, mw;
1432 uint i, n;
1433 Client *c;
1434
1435 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1436 if(n == 0)
1437 return;
1438
1439 /* master */
1440 c = nexttiled(clients);
1441 mw = mfact * ww;
1442 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1443
1444 if(--n == 0)
1445 return;
1446
1447 /* tile stack */
1448 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1449 y = wy;
1450 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1451 h = wh / n;
1452 if(h < bh)
1453 h = wh;
1454
1455 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1456 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1457 ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
1458 if(h != wh)
1459 y = c->y + c->h + 2 * c->bw;
1460 }
1461}
1462
1463void
1464togglebar(const void *arg) {
1465 showbar = !showbar;
1466 updategeom();
1467 updatebar();
1468 arrange();
1469}
1470
1471void
1472togglefloating(const void *arg) {
1473 if(!sel)
1474 return;
1475 sel->isfloating = !sel->isfloating || sel->isfixed;
1476 if(sel->isfloating)
1477 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1478 arrange();
1479}
1480
1481void
1482togglelayout(const void *arg) {
1483 uint i;
1484
1485 if(!arg) {
1486 if(++lt == &layouts[LENGTH(layouts)])
1487 lt = &layouts[0];
1488 }
1489 else {
1490 for(i = 0; i < LENGTH(layouts); i++)
1491 if(!strcmp((char *)arg, layouts[i].symbol))
1492 break;
1493 if(i == LENGTH(layouts))
1494 return;
1495 lt = &layouts[i];
1496 }
1497 if(sel)
1498 arrange();
1499 else
1500 drawbar();
1501}
1502
1503void
1504togglemax(const void *arg) {
1505 ismax = !ismax;
1506 arrange();
1507}
1508
1509void
1510toggletag(const void *arg) {
1511 if(sel && (sel->tags ^ ((*(int *)arg) & TAGMASK))) {
1512 sel->tags ^= (*(int *)arg) & TAGMASK;
1513 arrange();
1514 }
1515}
1516
1517void
1518toggleview(const void *arg) {
1519 if((tagset[seltags] ^ ((*(int *)arg) & TAGMASK))) {
1520 tagset[seltags] ^= (*(int *)arg) & TAGMASK;
1521 arrange();
1522 }
1523}
1524
1525void
1526unmanage(Client *c) {
1527 XWindowChanges wc;
1528
1529 wc.border_width = c->oldbw;
1530 /* The server grab construct avoids race conditions. */
1531 XGrabServer(dpy);
1532 XSetErrorHandler(xerrordummy);
1533 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1534 detach(c);
1535 detachstack(c);
1536 if(sel == c)
1537 focus(NULL);
1538 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1539 setclientstate(c, WithdrawnState);
1540 free(c);
1541 XSync(dpy, False);
1542 XSetErrorHandler(xerror);
1543 XUngrabServer(dpy);
1544 arrange();
1545}
1546
1547void
1548unmapnotify(XEvent *e) {
1549 Client *c;
1550 XUnmapEvent *ev = &e->xunmap;
1551
1552 if((c = getclient(ev->window)))
1553 unmanage(c);
1554}
1555
1556void
1557updatebar(void) {
1558 if(dc.drawable != 0)
1559 XFreePixmap(dpy, dc.drawable);
1560 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1561 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1562}
1563
1564void
1565updategeom(void) {
1566#ifdef XINERAMA
1567 int i;
1568 XineramaScreenInfo *info = NULL;
1569
1570 /* window area geometry */
1571 if(XineramaIsActive(dpy)) {
1572 info = XineramaQueryScreens(dpy, &i);
1573 wx = info[0].x_org;
1574 wy = showbar && topbar ? info[0].y_org + bh : info[0].y_org;
1575 ww = info[0].width;
1576 wh = showbar ? info[0].height - bh : info[0].height;
1577 XFree(info);
1578 }
1579 else
1580#endif
1581 {
1582 wx = sx;
1583 wy = showbar && topbar ? sy + bh : sy;
1584 ww = sw;
1585 wh = showbar ? sh - bh : sh;
1586 }
1587
1588 /* bar position */
1589 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1590}
1591
1592void
1593updatesizehints(Client *c) {
1594 long msize;
1595 XSizeHints size;
1596
1597 XGetWMNormalHints(dpy, c->win, &size, &msize);
1598 if(size.flags & PBaseSize) {
1599 c->basew = size.base_width;
1600 c->baseh = size.base_height;
1601 }
1602 else if(size.flags & PMinSize) {
1603 c->basew = size.min_width;
1604 c->baseh = size.min_height;
1605 }
1606 else
1607 c->basew = c->baseh = 0;
1608 if(size.flags & PResizeInc) {
1609 c->incw = size.width_inc;
1610 c->inch = size.height_inc;
1611 }
1612 else
1613 c->incw = c->inch = 0;
1614 if(size.flags & PMaxSize) {
1615 c->maxw = size.max_width;
1616 c->maxh = size.max_height;
1617 }
1618 else
1619 c->maxw = c->maxh = 0;
1620 if(size.flags & PMinSize) {
1621 c->minw = size.min_width;
1622 c->minh = size.min_height;
1623 }
1624 else if(size.flags & PBaseSize) {
1625 c->minw = size.base_width;
1626 c->minh = size.base_height;
1627 }
1628 else
1629 c->minw = c->minh = 0;
1630 if(size.flags & PAspect) {
1631 c->minax = size.min_aspect.x;
1632 c->maxax = size.max_aspect.x;
1633 c->minay = size.min_aspect.y;
1634 c->maxay = size.max_aspect.y;
1635 }
1636 else
1637 c->minax = c->maxax = c->minay = c->maxay = 0;
1638 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1639 && c->maxw == c->minw && c->maxh == c->minh);
1640}
1641
1642void
1643updatetitle(Client *c) {
1644 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1645 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1646}
1647
1648void
1649updatewmhints(Client *c) {
1650 XWMHints *wmh;
1651
1652 if((wmh = XGetWMHints(dpy, c->win))) {
1653 if(c == sel)
1654 sel->isurgent = False;
1655 else
1656 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1657 XFree(wmh);
1658 }
1659}
1660
1661void
1662view(const void *arg) {
1663 seltags ^= 1; /* toggle sel tagset */
1664 if(arg && (*(int *)arg & TAGMASK))
1665 tagset[seltags] = *(int *)arg & TAGMASK;
1666 arrange();
1667}
1668
1669/* There's no way to check accesses to destroyed windows, thus those cases are
1670 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1671 * default error handler, which may call exit. */
1672int
1673xerror(Display *dpy, XErrorEvent *ee) {
1674 if(ee->error_code == BadWindow
1675 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1676 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1677 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1678 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1679 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1680 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1681 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1682 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1683 return 0;
1684 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1685 ee->request_code, ee->error_code);
1686 return xerrorxlib(dpy, ee); /* may call exit */
1687}
1688
1689int
1690xerrordummy(Display *dpy, XErrorEvent *ee) {
1691 return 0;
1692}
1693
1694/* Startup Error handler to check if another window manager
1695 * is already running. */
1696int
1697xerrorstart(Display *dpy, XErrorEvent *ee) {
1698 otherwm = True;
1699 return -1;
1700}
1701
1702void
1703zoom(const void *arg) {
1704 Client *c = sel;
1705
1706 if(ismax || !lt->arrange || (sel && sel->isfloating))
1707 return;
1708 if(c == nexttiled(clients))
1709 if(!c || !(c = nexttiled(c->next)))
1710 return;
1711 detach(c);
1712 attach(c);
1713 focus(c);
1714 arrange();
1715}
1716
1717int
1718main(int argc, char *argv[]) {
1719 if(argc == 2 && !strcmp("-v", argv[1]))
1720 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1721 else if(argc != 1)
1722 eprint("usage: dwm [-v]\n");
1723
1724 setlocale(LC_CTYPE, "");
1725 if(!(dpy = XOpenDisplay(0)))
1726 eprint("dwm: cannot open display\n");
1727
1728 checkotherwm();
1729 setup();
1730 scan();
1731 run();
1732 cleanup();
1733
1734 XCloseDisplay(dpy);
1735 return 0;
1736}