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