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[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * The event handlers of dwm are organized in an array which is accessed
10 * whenever a new event has been fetched. This allows event dispatching
11 * in O(1) time.
12 *
13 * Each child of the root window is called a client, except windows which have
14 * set the override_redirect flag. Clients are organized in a global
15 * linked client list, the focus history is remembered through a global
16 * stack list. Each client contains a bit array to indicate the tags of a
17 * client.
18 *
19 * Keys and tagging rules are organized as arrays and defined in config.h.
20 *
21 * To understand everything else, start reading main().
22 */
23 #include <errno.h>
24 #include <locale.h>
25 #include <stdarg.h>
26 #include <signal.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <sys/types.h>
32 #include <sys/wait.h>
33 #include <X11/cursorfont.h>
34 #include <X11/keysym.h>
35 #include <X11/Xatom.h>
36 #include <X11/Xlib.h>
37 #include <X11/Xproto.h>
38 #include <X11/Xutil.h>
39 #ifdef XINERAMA
40 #include <X11/extensions/Xinerama.h>
41 #endif
42
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
47 #define ISVISIBLE(x) (x->tags & tagset[seltags])
48 #define LENGTH(x) (sizeof x / sizeof x[0])
49 #define MAX(a, b) ((a) > (b) ? (a) : (b))
50 #define MIN(a, b) ((a) < (b) ? (a) : (b))
51 #define MAXTAGLEN 16
52 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
53 #define WIDTH(x) ((x)->w + 2 * (x)->bw)
54 #define HEIGHT(x) ((x)->h + 2 * (x)->bw)
55 #define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
56 #define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height)
57
58 /* enums */
59 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
60 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
61 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
62 enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
63 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
64 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
65
66 typedef union {
67 int i;
68 unsigned int ui;
69 float f;
70 void *v;
71 } Arg;
72
73 typedef struct {
74 unsigned int click;
75 unsigned int mask;
76 unsigned int button;
77 void (*func)(const Arg *arg);
78 const Arg arg;
79 } Button;
80
81 typedef struct Client Client;
82 struct Client {
83 char name[256];
84 float mina, maxa;
85 int x, y, w, h;
86 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
87 int bw, oldbw;
88 unsigned int tags;
89 Bool isfixed, isfloating, isurgent;
90 Client *next;
91 Client *snext;
92 Window win;
93 };
94
95 typedef struct {
96 int x, y, w, h;
97 unsigned long norm[ColLast];
98 unsigned long sel[ColLast];
99 Drawable drawable;
100 GC gc;
101 struct {
102 int ascent;
103 int descent;
104 int height;
105 XFontSet set;
106 XFontStruct *xfont;
107 } font;
108 } DC; /* draw context */
109
110 typedef struct {
111 unsigned int mod;
112 KeySym keysym;
113 void (*func)(const Arg *);
114 const Arg arg;
115 } Key;
116
117 typedef struct {
118 const char *symbol;
119 void (*arrange)(void);
120 } Layout;
121
122 typedef struct {
123 const char *class;
124 const char *instance;
125 const char *title;
126 unsigned int tags;
127 Bool isfloating;
128 } Rule;
129
130 /* function declarations */
131 static void applyrules(Client *c);
132 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h);
133 static void arrange(void);
134 static void attach(Client *c);
135 static void attachstack(Client *c);
136 static void buttonpress(XEvent *e);
137 static void checkotherwm(void);
138 static void cleanup(void);
139 static void clearurgent(Client *c);
140 static void configure(Client *c);
141 static void configurenotify(XEvent *e);
142 static void configurerequest(XEvent *e);
143 static void destroynotify(XEvent *e);
144 static void detach(Client *c);
145 static void detachstack(Client *c);
146 static void die(const char *errstr, ...);
147 static void drawbar(void);
148 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
149 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
150 static void enternotify(XEvent *e);
151 static void expose(XEvent *e);
152 static void focus(Client *c);
153 static void focusin(XEvent *e);
154 static void focusstack(const Arg *arg);
155 static Client *getclient(Window w);
156 static unsigned long getcolor(const char *colstr);
157 static long getstate(Window w);
158 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
159 static void grabbuttons(Client *c, Bool focused);
160 static void grabkeys(void);
161 static void initfont(const char *fontstr);
162 static Bool isprotodel(Client *c);
163 static void keypress(XEvent *e);
164 static void killclient(const Arg *arg);
165 static void manage(Window w, XWindowAttributes *wa);
166 static void mappingnotify(XEvent *e);
167 static void maprequest(XEvent *e);
168 static void monocle(void);
169 static void movemouse(const Arg *arg);
170 static Client *nexttiled(Client *c);
171 static void propertynotify(XEvent *e);
172 static void quit(const Arg *arg);
173 static void resize(Client *c, int x, int y, int w, int h);
174 static void resizemouse(const Arg *arg);
175 static void restack(void);
176 static void run(void);
177 static void scan(void);
178 static void setclientstate(Client *c, long state);
179 static void setlayout(const Arg *arg);
180 static void setmfact(const Arg *arg);
181 static void setup(void);
182 static void showhide(Client *c);
183 static void sigchld(int signal);
184 static void spawn(const Arg *arg);
185 static void tag(const Arg *arg);
186 static int textnw(const char *text, unsigned int len);
187 static void tile(void);
188 static void togglebar(const Arg *arg);
189 static void togglefloating(const Arg *arg);
190 static void toggletag(const Arg *arg);
191 static void toggleview(const Arg *arg);
192 static void unmanage(Client *c);
193 static void unmapnotify(XEvent *e);
194 static void updatebar(void);
195 static void updategeom(void);
196 static void updatenumlockmask(void);
197 static void updatesizehints(Client *c);
198 static void updatestatus(void);
199 static void updatetitle(Client *c);
200 static void updatewmhints(Client *c);
201 static void view(const Arg *arg);
202 static int xerror(Display *dpy, XErrorEvent *ee);
203 static int xerrordummy(Display *dpy, XErrorEvent *ee);
204 static int xerrorstart(Display *dpy, XErrorEvent *ee);
205 static void zoom(const Arg *arg);
206
207 /* variables */
208 static char stext[256];
209 static int screen;
210 static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
211 static int by, bh, blw; /* bar geometry y, height and layout symbol width */
212 static int wx, wy, ww, wh; /* window area geometry x, y, width, height, bar excluded */
213 static unsigned int seltags = 0, sellt = 0;
214 static int (*xerrorxlib)(Display *, XErrorEvent *);
215 static unsigned int numlockmask = 0;
216 static void (*handler[LASTEvent]) (XEvent *) = {
217 [ButtonPress] = buttonpress,
218 [ConfigureRequest] = configurerequest,
219 [ConfigureNotify] = configurenotify,
220 [DestroyNotify] = destroynotify,
221 [EnterNotify] = enternotify,
222 [Expose] = expose,
223 [FocusIn] = focusin,
224 [KeyPress] = keypress,
225 [MappingNotify] = mappingnotify,
226 [MapRequest] = maprequest,
227 [PropertyNotify] = propertynotify,
228 [UnmapNotify] = unmapnotify
229 };
230 static Atom wmatom[WMLast], netatom[NetLast];
231 static Bool otherwm;
232 static Bool running = True;
233 static Client *clients = NULL;
234 static Client *sel = NULL;
235 static Client *stack = NULL;
236 static Cursor cursor[CurLast];
237 static Display *dpy;
238 static DC dc;
239 static Layout *lt[] = { NULL, NULL };
240 static Window root, barwin;
241 /* configuration, allows nested code to access above variables */
242 #include "config.h"
243
244 /* compile-time check if all tags fit into an unsigned int bit array. */
245 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
246
247 /* function implementations */
248 void
249 applyrules(Client *c) {
250 unsigned int i;
251 Rule *r;
252 XClassHint ch = { 0 };
253
254 /* rule matching */
255 c->isfloating = c->tags = 0;
256 if(XGetClassHint(dpy, c->win, &ch)) {
257 for(i = 0; i < LENGTH(rules); i++) {
258 r = &rules[i];
259 if((!r->title || strstr(c->name, r->title))
260 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
261 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
262 c->isfloating = r->isfloating;
263 c->tags |= r->tags;
264 }
265 }
266 if(ch.res_class)
267 XFree(ch.res_class);
268 if(ch.res_name)
269 XFree(ch.res_name);
270 }
271 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : tagset[seltags];
272 }
273
274 Bool
275 applysizehints(Client *c, int *x, int *y, int *w, int *h) {
276 Bool baseismin;
277
278 /* set minimum possible */
279 *w = MAX(1, *w);
280 *h = MAX(1, *h);
281
282 if(*x > sx + sw)
283 *x = sw - WIDTH(c);
284 if(*y > sy + sh)
285 *y = sh - HEIGHT(c);
286 if(*x + *w + 2 * c->bw < sx)
287 *x = sx;
288 if(*y + *h + 2 * c->bw < sy)
289 *y = sy;
290 if(*h < bh)
291 *h = bh;
292 if(*w < bh)
293 *w = bh;
294
295 if(resizehints || c->isfloating) {
296 /* see last two sentences in ICCCM 4.1.2.3 */
297 baseismin = c->basew == c->minw && c->baseh == c->minh;
298
299 if(!baseismin) { /* temporarily remove base dimensions */
300 *w -= c->basew;
301 *h -= c->baseh;
302 }
303
304 /* adjust for aspect limits */
305 if(c->mina > 0 && c->maxa > 0) {
306 if(c->maxa < (float)*w / *h)
307 *w = *h * c->maxa;
308 else if(c->mina < (float)*h / *w)
309 *h = *w * c->mina;
310 }
311
312 if(baseismin) { /* increment calculation requires this */
313 *w -= c->basew;
314 *h -= c->baseh;
315 }
316
317 /* adjust for increment value */
318 if(c->incw)
319 *w -= *w % c->incw;
320 if(c->inch)
321 *h -= *h % c->inch;
322
323 /* restore base dimensions */
324 *w += c->basew;
325 *h += c->baseh;
326
327 *w = MAX(*w, c->minw);
328 *h = MAX(*h, c->minh);
329
330 if(c->maxw)
331 *w = MIN(*w, c->maxw);
332
333 if(c->maxh)
334 *h = MIN(*h, c->maxh);
335 }
336 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
337 }
338
339 void
340 arrange(void) {
341 showhide(stack);
342 focus(NULL);
343 if(lt[sellt]->arrange)
344 lt[sellt]->arrange();
345 restack();
346 }
347
348 void
349 attach(Client *c) {
350 c->next = clients;
351 clients = c;
352 }
353
354 void
355 attachstack(Client *c) {
356 c->snext = stack;
357 stack = c;
358 }
359
360 void
361 buttonpress(XEvent *e) {
362 unsigned int i, x, click;
363 Arg arg = {0};
364 Client *c;
365 XButtonPressedEvent *ev = &e->xbutton;
366
367 click = ClkRootWin;
368 if(ev->window == barwin) {
369 i = x = 0;
370 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
371 if(i < LENGTH(tags)) {
372 click = ClkTagBar;
373 arg.ui = 1 << i;
374 }
375 else if(ev->x < x + blw)
376 click = ClkLtSymbol;
377 else if(ev->x > wx + ww - TEXTW(stext))
378 click = ClkStatusText;
379 else
380 click = ClkWinTitle;
381 }
382 else if((c = getclient(ev->window))) {
383 focus(c);
384 click = ClkClientWin;
385 }
386
387 for(i = 0; i < LENGTH(buttons); i++)
388 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
389 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
390 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
391 }
392
393 void
394 checkotherwm(void) {
395 otherwm = False;
396 xerrorxlib = XSetErrorHandler(xerrorstart);
397
398 /* this causes an error if some other window manager is running */
399 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
400 XSync(dpy, False);
401 if(otherwm)
402 die("dwm: another window manager is already running\n");
403 XSetErrorHandler(xerror);
404 XSync(dpy, False);
405 }
406
407 void
408 cleanup(void) {
409 Arg a = {.ui = ~0};
410 Layout foo = { "", NULL };
411
412 view(&a);
413 lt[sellt] = &foo;
414 while(stack)
415 unmanage(stack);
416 if(dc.font.set)
417 XFreeFontSet(dpy, dc.font.set);
418 else
419 XFreeFont(dpy, dc.font.xfont);
420 XUngrabKey(dpy, AnyKey, AnyModifier, root);
421 XFreePixmap(dpy, dc.drawable);
422 XFreeGC(dpy, dc.gc);
423 XFreeCursor(dpy, cursor[CurNormal]);
424 XFreeCursor(dpy, cursor[CurResize]);
425 XFreeCursor(dpy, cursor[CurMove]);
426 XDestroyWindow(dpy, barwin);
427 XSync(dpy, False);
428 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
429 }
430
431 void
432 clearurgent(Client *c) {
433 XWMHints *wmh;
434
435 c->isurgent = False;
436 if(!(wmh = XGetWMHints(dpy, c->win)))
437 return;
438 wmh->flags &= ~XUrgencyHint;
439 XSetWMHints(dpy, c->win, wmh);
440 XFree(wmh);
441 }
442
443 void
444 configure(Client *c) {
445 XConfigureEvent ce;
446
447 ce.type = ConfigureNotify;
448 ce.display = dpy;
449 ce.event = c->win;
450 ce.window = c->win;
451 ce.x = c->x;
452 ce.y = c->y;
453 ce.width = c->w;
454 ce.height = c->h;
455 ce.border_width = c->bw;
456 ce.above = None;
457 ce.override_redirect = False;
458 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
459 }
460
461 void
462 configurenotify(XEvent *e) {
463 XConfigureEvent *ev = &e->xconfigure;
464
465 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
466 sw = ev->width;
467 sh = ev->height;
468 updategeom();
469 updatebar();
470 arrange();
471 }
472 }
473
474 void
475 configurerequest(XEvent *e) {
476 Client *c;
477 XConfigureRequestEvent *ev = &e->xconfigurerequest;
478 XWindowChanges wc;
479
480 if((c = getclient(ev->window))) {
481 if(ev->value_mask & CWBorderWidth)
482 c->bw = ev->border_width;
483 else if(c->isfloating || !lt[sellt]->arrange) {
484 if(ev->value_mask & CWX)
485 c->x = sx + ev->x;
486 if(ev->value_mask & CWY)
487 c->y = sy + ev->y;
488 if(ev->value_mask & CWWidth)
489 c->w = ev->width;
490 if(ev->value_mask & CWHeight)
491 c->h = ev->height;
492 if((c->x - sx + c->w) > sw && c->isfloating)
493 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
494 if((c->y - sy + c->h) > sh && c->isfloating)
495 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
496 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
497 configure(c);
498 if(ISVISIBLE(c))
499 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
500 }
501 else
502 configure(c);
503 }
504 else {
505 wc.x = ev->x;
506 wc.y = ev->y;
507 wc.width = ev->width;
508 wc.height = ev->height;
509 wc.border_width = ev->border_width;
510 wc.sibling = ev->above;
511 wc.stack_mode = ev->detail;
512 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
513 }
514 XSync(dpy, False);
515 }
516
517 void
518 destroynotify(XEvent *e) {
519 Client *c;
520 XDestroyWindowEvent *ev = &e->xdestroywindow;
521
522 if((c = getclient(ev->window)))
523 unmanage(c);
524 }
525
526 void
527 detach(Client *c) {
528 Client **tc;
529
530 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
531 *tc = c->next;
532 }
533
534 void
535 detachstack(Client *c) {
536 Client **tc;
537
538 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
539 *tc = c->snext;
540 }
541
542 void
543 die(const char *errstr, ...) {
544 va_list ap;
545
546 va_start(ap, errstr);
547 vfprintf(stderr, errstr, ap);
548 va_end(ap);
549 exit(EXIT_FAILURE);
550 }
551
552 void
553 drawbar(void) {
554 int x;
555 unsigned int i, occ = 0, urg = 0;
556 unsigned long *col;
557 Client *c;
558
559 for(c = clients; c; c = c->next) {
560 occ |= c->tags;
561 if(c->isurgent)
562 urg |= c->tags;
563 }
564
565 dc.x = 0;
566 for(i = 0; i < LENGTH(tags); i++) {
567 dc.w = TEXTW(tags[i]);
568 col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
569 drawtext(tags[i], col, urg & 1 << i);
570 drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
571 dc.x += dc.w;
572 }
573 if(blw > 0) {
574 dc.w = blw;
575 drawtext(lt[sellt]->symbol, dc.norm, False);
576 x = dc.x + dc.w;
577 }
578 else
579 x = dc.x;
580 dc.w = TEXTW(stext);
581 dc.x = ww - dc.w;
582 if(dc.x < x) {
583 dc.x = x;
584 dc.w = ww - x;
585 }
586 drawtext(stext, dc.norm, False);
587 if((dc.w = dc.x - x) > bh) {
588 dc.x = x;
589 if(sel) {
590 drawtext(sel->name, dc.sel, False);
591 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
592 }
593 else
594 drawtext(NULL, dc.norm, False);
595 }
596 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
597 XSync(dpy, False);
598 }
599
600 void
601 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
602 int x;
603 XGCValues gcv;
604 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
605
606 gcv.foreground = col[invert ? ColBG : ColFG];
607 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
608 x = (dc.font.ascent + dc.font.descent + 2) / 4;
609 r.x = dc.x + 1;
610 r.y = dc.y + 1;
611 if(filled) {
612 r.width = r.height = x + 1;
613 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
614 }
615 else if(empty) {
616 r.width = r.height = x;
617 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
618 }
619 }
620
621 void
622 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
623 char buf[256];
624 int i, x, y, h, len, olen;
625 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
626
627 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
628 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
629 if(!text)
630 return;
631 olen = strlen(text);
632 h = dc.font.ascent + dc.font.descent;
633 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
634 x = dc.x + (h / 2);
635 /* shorten text if necessary */
636 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
637 if(!len)
638 return;
639 memcpy(buf, text, len);
640 if(len < olen)
641 for(i = len; i && i > len - 3; buf[--i] = '.');
642 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
643 if(dc.font.set)
644 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
645 else
646 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
647 }
648
649 void
650 enternotify(XEvent *e) {
651 Client *c;
652 XCrossingEvent *ev = &e->xcrossing;
653
654 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
655 return;
656 if((c = getclient(ev->window)))
657 focus(c);
658 else
659 focus(NULL);
660 }
661
662 void
663 expose(XEvent *e) {
664 XExposeEvent *ev = &e->xexpose;
665
666 if(ev->count == 0 && (ev->window == barwin))
667 drawbar();
668 }
669
670 void
671 focus(Client *c) {
672 if(!c || !ISVISIBLE(c))
673 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
674 if(sel && sel != c) {
675 grabbuttons(sel, False);
676 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
677 }
678 if(c) {
679 if(c->isurgent)
680 clearurgent(c);
681 detachstack(c);
682 attachstack(c);
683 grabbuttons(c, True);
684 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
685 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
686 }
687 else
688 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
689 sel = c;
690 drawbar();
691 }
692
693 void
694 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
695 XFocusChangeEvent *ev = &e->xfocus;
696
697 if(sel && ev->window != sel->win)
698 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
699 }
700
701 void
702 focusstack(const Arg *arg) {
703 Client *c = NULL, *i;
704
705 if(!sel)
706 return;
707 if (arg->i > 0) {
708 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
709 if(!c)
710 for(c = clients; c && !ISVISIBLE(c); c = c->next);
711 }
712 else {
713 for(i = clients; i != sel; i = i->next)
714 if(ISVISIBLE(i))
715 c = i;
716 if(!c)
717 for(; i; i = i->next)
718 if(ISVISIBLE(i))
719 c = i;
720 }
721 if(c) {
722 focus(c);
723 restack();
724 }
725 }
726
727 Client *
728 getclient(Window w) {
729 Client *c;
730
731 for(c = clients; c && c->win != w; c = c->next);
732 return c;
733 }
734
735 unsigned long
736 getcolor(const char *colstr) {
737 Colormap cmap = DefaultColormap(dpy, screen);
738 XColor color;
739
740 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
741 die("error, cannot allocate color '%s'\n", colstr);
742 return color.pixel;
743 }
744
745 long
746 getstate(Window w) {
747 int format, status;
748 long result = -1;
749 unsigned char *p = NULL;
750 unsigned long n, extra;
751 Atom real;
752
753 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
754 &real, &format, &n, &extra, (unsigned char **)&p);
755 if(status != Success)
756 return -1;
757 if(n != 0)
758 result = *p;
759 XFree(p);
760 return result;
761 }
762
763 Bool
764 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
765 char **list = NULL;
766 int n;
767 XTextProperty name;
768
769 if(!text || size == 0)
770 return False;
771 text[0] = '\0';
772 XGetTextProperty(dpy, w, &name, atom);
773 if(!name.nitems)
774 return False;
775 if(name.encoding == XA_STRING)
776 strncpy(text, (char *)name.value, size - 1);
777 else {
778 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
779 && n > 0 && *list) {
780 strncpy(text, *list, size - 1);
781 XFreeStringList(list);
782 }
783 }
784 text[size - 1] = '\0';
785 XFree(name.value);
786 return True;
787 }
788
789 void
790 grabbuttons(Client *c, Bool focused) {
791 updatenumlockmask();
792 {
793 unsigned int i, j;
794 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
795 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
796 if(focused) {
797 for(i = 0; i < LENGTH(buttons); i++)
798 if(buttons[i].click == ClkClientWin)
799 for(j = 0; j < LENGTH(modifiers); j++)
800 XGrabButton(dpy, buttons[i].button,
801 buttons[i].mask | modifiers[j],
802 c->win, False, BUTTONMASK,
803 GrabModeAsync, GrabModeSync, None, None);
804 } else
805 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
806 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
807 }
808 }
809
810 void
811 grabkeys(void) {
812 updatenumlockmask();
813 { /* grab keys */
814 unsigned int i, j;
815 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
816 KeyCode code;
817
818 XUngrabKey(dpy, AnyKey, AnyModifier, root);
819 for(i = 0; i < LENGTH(keys); i++) {
820 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
821 for(j = 0; j < LENGTH(modifiers); j++)
822 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
823 True, GrabModeAsync, GrabModeAsync);
824 }
825 }
826 }
827
828 void
829 initfont(const char *fontstr) {
830 char *def, **missing;
831 int i, n;
832
833 missing = NULL;
834 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
835 if(missing) {
836 while(n--)
837 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
838 XFreeStringList(missing);
839 }
840 if(dc.font.set) {
841 XFontSetExtents *font_extents;
842 XFontStruct **xfonts;
843 char **font_names;
844 dc.font.ascent = dc.font.descent = 0;
845 font_extents = XExtentsOfFontSet(dc.font.set);
846 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
847 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
848 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
849 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
850 xfonts++;
851 }
852 }
853 else {
854 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
855 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
856 die("error, cannot load font: '%s'\n", fontstr);
857 dc.font.ascent = dc.font.xfont->ascent;
858 dc.font.descent = dc.font.xfont->descent;
859 }
860 dc.font.height = dc.font.ascent + dc.font.descent;
861 }
862
863 Bool
864 isprotodel(Client *c) {
865 int i, n;
866 Atom *protocols;
867 Bool ret = False;
868
869 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
870 for(i = 0; !ret && i < n; i++)
871 if(protocols[i] == wmatom[WMDelete])
872 ret = True;
873 XFree(protocols);
874 }
875 return ret;
876 }
877
878 void
879 keypress(XEvent *e) {
880 unsigned int i;
881 KeySym keysym;
882 XKeyEvent *ev;
883
884 ev = &e->xkey;
885 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
886 for(i = 0; i < LENGTH(keys); i++)
887 if(keysym == keys[i].keysym
888 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
889 && keys[i].func)
890 keys[i].func(&(keys[i].arg));
891 }
892
893 void
894 killclient(const Arg *arg) {
895 XEvent ev;
896
897 if(!sel)
898 return;
899 if(isprotodel(sel)) {
900 ev.type = ClientMessage;
901 ev.xclient.window = sel->win;
902 ev.xclient.message_type = wmatom[WMProtocols];
903 ev.xclient.format = 32;
904 ev.xclient.data.l[0] = wmatom[WMDelete];
905 ev.xclient.data.l[1] = CurrentTime;
906 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
907 }
908 else
909 XKillClient(dpy, sel->win);
910 }
911
912 void
913 manage(Window w, XWindowAttributes *wa) {
914 static Client cz;
915 Client *c, *t = NULL;
916 Window trans = None;
917 XWindowChanges wc;
918
919 if(!(c = malloc(sizeof(Client))))
920 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
921 *c = cz;
922 c->win = w;
923
924 /* geometry */
925 c->x = wa->x;
926 c->y = wa->y;
927 c->w = wa->width;
928 c->h = wa->height;
929 c->oldbw = wa->border_width;
930 if(c->w == sw && c->h == sh) {
931 c->x = sx;
932 c->y = sy;
933 c->bw = 0;
934 }
935 else {
936 if(c->x + WIDTH(c) > sx + sw)
937 c->x = sx + sw - WIDTH(c);
938 if(c->y + HEIGHT(c) > sy + sh)
939 c->y = sy + sh - HEIGHT(c);
940 c->x = MAX(c->x, sx);
941 /* only fix client y-offset, if the client center might cover the bar */
942 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx)
943 && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
944 c->bw = borderpx;
945 }
946
947 wc.border_width = c->bw;
948 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
949 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
950 configure(c); /* propagates border_width, if size doesn't change */
951 updatesizehints(c);
952 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
953 grabbuttons(c, False);
954 updatetitle(c);
955 if(XGetTransientForHint(dpy, w, &trans))
956 t = getclient(trans);
957 if(t)
958 c->tags = t->tags;
959 else
960 applyrules(c);
961 if(!c->isfloating)
962 c->isfloating = trans != None || c->isfixed;
963 if(c->isfloating)
964 XRaiseWindow(dpy, c->win);
965 attach(c);
966 attachstack(c);
967 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
968 XMapWindow(dpy, c->win);
969 setclientstate(c, NormalState);
970 arrange();
971 }
972
973 void
974 mappingnotify(XEvent *e) {
975 XMappingEvent *ev = &e->xmapping;
976
977 XRefreshKeyboardMapping(ev);
978 if(ev->request == MappingKeyboard)
979 grabkeys();
980 }
981
982 void
983 maprequest(XEvent *e) {
984 static XWindowAttributes wa;
985 XMapRequestEvent *ev = &e->xmaprequest;
986
987 if(!XGetWindowAttributes(dpy, ev->window, &wa))
988 return;
989 if(wa.override_redirect)
990 return;
991 if(!getclient(ev->window))
992 manage(ev->window, &wa);
993 }
994
995 void
996 monocle(void) {
997 Client *c;
998
999 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1000 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
1001 }
1002 }
1003
1004 void
1005 movemouse(const Arg *arg) {
1006 int x, y, ocx, ocy, di, nx, ny;
1007 unsigned int dui;
1008 Client *c;
1009 Window dummy;
1010 XEvent ev;
1011
1012 if(!(c = sel))
1013 return;
1014 restack();
1015 ocx = c->x;
1016 ocy = c->y;
1017 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1018 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1019 return;
1020 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
1021 do {
1022 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1023 switch (ev.type) {
1024 case ConfigureRequest:
1025 case Expose:
1026 case MapRequest:
1027 handler[ev.type](&ev);
1028 break;
1029 case MotionNotify:
1030 nx = ocx + (ev.xmotion.x - x);
1031 ny = ocy + (ev.xmotion.y - y);
1032 if(snap && nx >= wx && nx <= wx + ww
1033 && ny >= wy && ny <= wy + wh) {
1034 if(abs(wx - nx) < snap)
1035 nx = wx;
1036 else if(abs((wx + ww) - (nx + WIDTH(c))) < snap)
1037 nx = wx + ww - WIDTH(c);
1038 if(abs(wy - ny) < snap)
1039 ny = wy;
1040 else if(abs((wy + wh) - (ny + HEIGHT(c))) < snap)
1041 ny = wy + wh - HEIGHT(c);
1042 if(!c->isfloating && lt[sellt]->arrange
1043 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1044 togglefloating(NULL);
1045 }
1046 if(!lt[sellt]->arrange || c->isfloating)
1047 resize(c, nx, ny, c->w, c->h);
1048 break;
1049 }
1050 }
1051 while(ev.type != ButtonRelease);
1052 XUngrabPointer(dpy, CurrentTime);
1053 }
1054
1055 Client *
1056 nexttiled(Client *c) {
1057 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1058 return c;
1059 }
1060
1061 void
1062 propertynotify(XEvent *e) {
1063 Client *c;
1064 Window trans;
1065 XPropertyEvent *ev = &e->xproperty;
1066
1067 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1068 updatestatus();
1069 else if(ev->state == PropertyDelete)
1070 return; /* ignore */
1071 else if((c = getclient(ev->window))) {
1072 switch (ev->atom) {
1073 default: break;
1074 case XA_WM_TRANSIENT_FOR:
1075 XGetTransientForHint(dpy, c->win, &trans);
1076 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1077 arrange();
1078 break;
1079 case XA_WM_NORMAL_HINTS:
1080 updatesizehints(c);
1081 break;
1082 case XA_WM_HINTS:
1083 updatewmhints(c);
1084 drawbar();
1085 break;
1086 }
1087 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1088 updatetitle(c);
1089 if(c == sel)
1090 drawbar();
1091 }
1092 }
1093 }
1094
1095 void
1096 quit(const Arg *arg) {
1097 running = False;
1098 }
1099
1100 void
1101 resize(Client *c, int x, int y, int w, int h) {
1102 XWindowChanges wc;
1103
1104 if(applysizehints(c, &x, &y, &w, &h)) {
1105 c->x = wc.x = x;
1106 c->y = wc.y = y;
1107 c->w = wc.width = w;
1108 c->h = wc.height = h;
1109 wc.border_width = c->bw;
1110 XConfigureWindow(dpy, c->win,
1111 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1112 configure(c);
1113 XSync(dpy, False);
1114 }
1115 }
1116
1117 void
1118 resizemouse(const Arg *arg) {
1119 int ocx, ocy;
1120 int nw, nh;
1121 Client *c;
1122 XEvent ev;
1123
1124 if(!(c = sel))
1125 return;
1126 restack();
1127 ocx = c->x;
1128 ocy = c->y;
1129 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1130 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1131 return;
1132 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1133 do {
1134 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1135 switch(ev.type) {
1136 case ConfigureRequest:
1137 case Expose:
1138 case MapRequest:
1139 handler[ev.type](&ev);
1140 break;
1141 case MotionNotify:
1142 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1143 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1144
1145 if(snap && nw >= wx && nw <= wx + ww
1146 && nh >= wy && nh <= wy + wh) {
1147 if(!c->isfloating && lt[sellt]->arrange
1148 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1149 togglefloating(NULL);
1150 }
1151 if(!lt[sellt]->arrange || c->isfloating)
1152 resize(c, c->x, c->y, nw, nh);
1153 break;
1154 }
1155 }
1156 while(ev.type != ButtonRelease);
1157 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1158 XUngrabPointer(dpy, CurrentTime);
1159 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1160 }
1161
1162 void
1163 restack(void) {
1164 Client *c;
1165 XEvent ev;
1166 XWindowChanges wc;
1167
1168 drawbar();
1169 if(!sel)
1170 return;
1171 if(sel->isfloating || !lt[sellt]->arrange)
1172 XRaiseWindow(dpy, sel->win);
1173 if(lt[sellt]->arrange) {
1174 wc.stack_mode = Below;
1175 wc.sibling = barwin;
1176 for(c = stack; c; c = c->snext)
1177 if(!c->isfloating && ISVISIBLE(c)) {
1178 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1179 wc.sibling = c->win;
1180 }
1181 }
1182 XSync(dpy, False);
1183 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1184 }
1185
1186 void
1187 run(void) {
1188 XEvent ev;
1189
1190 /* main event loop */
1191 XSync(dpy, False);
1192 while(running && !XNextEvent(dpy, &ev)) {
1193 if(handler[ev.type])
1194 (handler[ev.type])(&ev); /* call handler */
1195 }
1196 }
1197
1198 void
1199 scan(void) {
1200 unsigned int i, num;
1201 Window d1, d2, *wins = NULL;
1202 XWindowAttributes wa;
1203
1204 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1205 for(i = 0; i < num; i++) {
1206 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1207 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1208 continue;
1209 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1210 manage(wins[i], &wa);
1211 }
1212 for(i = 0; i < num; i++) { /* now the transients */
1213 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1214 continue;
1215 if(XGetTransientForHint(dpy, wins[i], &d1)
1216 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1217 manage(wins[i], &wa);
1218 }
1219 if(wins)
1220 XFree(wins);
1221 }
1222 }
1223
1224 void
1225 setclientstate(Client *c, long state) {
1226 long data[] = {state, None};
1227
1228 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1229 PropModeReplace, (unsigned char *)data, 2);
1230 }
1231
1232 void
1233 setlayout(const Arg *arg) {
1234 if(!arg || !arg->v || arg->v != lt[sellt])
1235 sellt ^= 1;
1236 if(arg && arg->v)
1237 lt[sellt] = (Layout *)arg->v;
1238 if(sel)
1239 arrange();
1240 else
1241 drawbar();
1242 }
1243
1244 /* arg > 1.0 will set mfact absolutly */
1245 void
1246 setmfact(const Arg *arg) {
1247 float f;
1248
1249 if(!arg || !lt[sellt]->arrange)
1250 return;
1251 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1252 if(f < 0.1 || f > 0.9)
1253 return;
1254 mfact = f;
1255 arrange();
1256 }
1257
1258 void
1259 setup(void) {
1260 unsigned int i;
1261 int w;
1262 XSetWindowAttributes wa;
1263
1264 /* init screen */
1265 screen = DefaultScreen(dpy);
1266 root = RootWindow(dpy, screen);
1267 initfont(font);
1268 sx = 0;
1269 sy = 0;
1270 sw = DisplayWidth(dpy, screen);
1271 sh = DisplayHeight(dpy, screen);
1272 bh = dc.h = dc.font.height + 2;
1273 lt[0] = &layouts[0];
1274 lt[1] = &layouts[1 % LENGTH(layouts)];
1275 updategeom();
1276
1277 /* init atoms */
1278 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1279 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1280 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1281 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1282 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1283
1284 /* init cursors */
1285 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1286 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1287 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1288
1289 /* init appearance */
1290 dc.norm[ColBorder] = getcolor(normbordercolor);
1291 dc.norm[ColBG] = getcolor(normbgcolor);
1292 dc.norm[ColFG] = getcolor(normfgcolor);
1293 dc.sel[ColBorder] = getcolor(selbordercolor);
1294 dc.sel[ColBG] = getcolor(selbgcolor);
1295 dc.sel[ColFG] = getcolor(selfgcolor);
1296 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1297 dc.gc = XCreateGC(dpy, root, 0, NULL);
1298 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1299 if(!dc.font.set)
1300 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1301
1302 /* init bar */
1303 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1304 w = TEXTW(layouts[i].symbol);
1305 blw = MAX(blw, w);
1306 }
1307
1308 wa.override_redirect = True;
1309 wa.background_pixmap = ParentRelative;
1310 wa.event_mask = ButtonPressMask|ExposureMask;
1311
1312 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1313 CopyFromParent, DefaultVisual(dpy, screen),
1314 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1315 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1316 XMapRaised(dpy, barwin);
1317 updatestatus();
1318
1319 /* EWMH support per view */
1320 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1321 PropModeReplace, (unsigned char *) netatom, NetLast);
1322
1323 /* select for events */
1324 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1325 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1326 |PropertyChangeMask;
1327 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1328 XSelectInput(dpy, root, wa.event_mask);
1329
1330 grabkeys();
1331 }
1332
1333 void
1334 showhide(Client *c) {
1335 if(!c)
1336 return;
1337 if(ISVISIBLE(c)) { /* show clients top down */
1338 XMoveWindow(dpy, c->win, c->x, c->y);
1339 if(!lt[sellt]->arrange || c->isfloating)
1340 resize(c, c->x, c->y, c->w, c->h);
1341 showhide(c->snext);
1342 }
1343 else { /* hide clients bottom up */
1344 showhide(c->snext);
1345 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1346 }
1347 }
1348
1349
1350 void
1351 sigchld(int signal) {
1352 while(0 < waitpid(-1, NULL, WNOHANG));
1353 }
1354
1355 void
1356 spawn(const Arg *arg) {
1357 signal(SIGCHLD, sigchld);
1358 if(fork() == 0) {
1359 if(dpy)
1360 close(ConnectionNumber(dpy));
1361 setsid();
1362 execvp(((char **)arg->v)[0], (char **)arg->v);
1363 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1364 perror(" failed");
1365 exit(0);
1366 }
1367 }
1368
1369 void
1370 tag(const Arg *arg) {
1371 if(sel && arg->ui & TAGMASK) {
1372 sel->tags = arg->ui & TAGMASK;
1373 arrange();
1374 }
1375 }
1376
1377 int
1378 textnw(const char *text, unsigned int len) {
1379 XRectangle r;
1380
1381 if(dc.font.set) {
1382 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1383 return r.width;
1384 }
1385 return XTextWidth(dc.font.xfont, text, len);
1386 }
1387
1388 void
1389 tile(void) {
1390 int x, y, h, w, mw;
1391 unsigned int i, n;
1392 Client *c;
1393
1394 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1395 if(n == 0)
1396 return;
1397
1398 /* master */
1399 c = nexttiled(clients);
1400 mw = mfact * ww;
1401 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw);
1402
1403 if(--n == 0)
1404 return;
1405
1406 /* tile stack */
1407 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1408 y = wy;
1409 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1410 h = wh / n;
1411 if(h < bh)
1412 h = wh;
1413
1414 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1415 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1416 ? wy + wh - y - 2 * c->bw : h - 2 * c->bw));
1417 if(h != wh)
1418 y = c->y + HEIGHT(c);
1419 }
1420 }
1421
1422 void
1423 togglebar(const Arg *arg) {
1424 showbar = !showbar;
1425 updategeom();
1426 updatebar();
1427 arrange();
1428 }
1429
1430 void
1431 togglefloating(const Arg *arg) {
1432 if(!sel)
1433 return;
1434 sel->isfloating = !sel->isfloating || sel->isfixed;
1435 if(sel->isfloating)
1436 resize(sel, sel->x, sel->y, sel->w, sel->h);
1437 arrange();
1438 }
1439
1440 void
1441 toggletag(const Arg *arg) {
1442 unsigned int mask;
1443
1444 if (!sel)
1445 return;
1446
1447 mask = sel->tags ^ (arg->ui & TAGMASK);
1448 if(mask) {
1449 sel->tags = mask;
1450 arrange();
1451 }
1452 }
1453
1454 void
1455 toggleview(const Arg *arg) {
1456 unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1457
1458 if(mask) {
1459 tagset[seltags] = mask;
1460 arrange();
1461 }
1462 }
1463
1464 void
1465 unmanage(Client *c) {
1466 XWindowChanges wc;
1467
1468 wc.border_width = c->oldbw;
1469 /* The server grab construct avoids race conditions. */
1470 XGrabServer(dpy);
1471 XSetErrorHandler(xerrordummy);
1472 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1473 detach(c);
1474 detachstack(c);
1475 if(sel == c)
1476 focus(NULL);
1477 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1478 setclientstate(c, WithdrawnState);
1479 free(c);
1480 XSync(dpy, False);
1481 XSetErrorHandler(xerror);
1482 XUngrabServer(dpy);
1483 arrange();
1484 }
1485
1486 void
1487 unmapnotify(XEvent *e) {
1488 Client *c;
1489 XUnmapEvent *ev = &e->xunmap;
1490
1491 if((c = getclient(ev->window)))
1492 unmanage(c);
1493 }
1494
1495 void
1496 updatebar(void) {
1497 if(dc.drawable != 0)
1498 XFreePixmap(dpy, dc.drawable);
1499 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1500 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1501 }
1502
1503 void
1504 updategeom(void) {
1505 #ifdef XINERAMA
1506 int n, i = 0;
1507 XineramaScreenInfo *info = NULL;
1508
1509 /* window area geometry */
1510 if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
1511 if(n > 1) {
1512 int di, x, y;
1513 unsigned int dui;
1514 Window dummy;
1515 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1516 for(i = 0; i < n; i++)
1517 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
1518 break;
1519 }
1520 wx = info[i].x_org;
1521 wy = showbar && topbar ? info[i].y_org + bh : info[i].y_org;
1522 ww = info[i].width;
1523 wh = showbar ? info[i].height - bh : info[i].height;
1524 XFree(info);
1525 }
1526 else
1527 #endif
1528 {
1529 wx = sx;
1530 wy = showbar && topbar ? sy + bh : sy;
1531 ww = sw;
1532 wh = showbar ? sh - bh : sh;
1533 }
1534
1535 /* bar position */
1536 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1537 }
1538
1539 void
1540 updatenumlockmask(void) {
1541 unsigned int i, j;
1542 XModifierKeymap *modmap;
1543
1544 numlockmask = 0;
1545 modmap = XGetModifierMapping(dpy);
1546 for(i = 0; i < 8; i++)
1547 for(j = 0; j < modmap->max_keypermod; j++)
1548 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1549 == XKeysymToKeycode(dpy, XK_Num_Lock))
1550 numlockmask = (1 << i);
1551 XFreeModifiermap(modmap);
1552 }
1553
1554 void
1555 updatesizehints(Client *c) {
1556 long msize;
1557 XSizeHints size;
1558
1559 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1560 /* size is uninitialized, ensure that size.flags aren't used */
1561 size.flags = PSize;
1562 if(size.flags & PBaseSize) {
1563 c->basew = size.base_width;
1564 c->baseh = size.base_height;
1565 }
1566 else if(size.flags & PMinSize) {
1567 c->basew = size.min_width;
1568 c->baseh = size.min_height;
1569 }
1570 else
1571 c->basew = c->baseh = 0;
1572 if(size.flags & PResizeInc) {
1573 c->incw = size.width_inc;
1574 c->inch = size.height_inc;
1575 }
1576 else
1577 c->incw = c->inch = 0;
1578 if(size.flags & PMaxSize) {
1579 c->maxw = size.max_width;
1580 c->maxh = size.max_height;
1581 }
1582 else
1583 c->maxw = c->maxh = 0;
1584 if(size.flags & PMinSize) {
1585 c->minw = size.min_width;
1586 c->minh = size.min_height;
1587 }
1588 else if(size.flags & PBaseSize) {
1589 c->minw = size.base_width;
1590 c->minh = size.base_height;
1591 }
1592 else
1593 c->minw = c->minh = 0;
1594 if(size.flags & PAspect) {
1595 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1596 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1597 }
1598 else
1599 c->maxa = c->mina = 0.0;
1600 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1601 && c->maxw == c->minw && c->maxh == c->minh);
1602 }
1603
1604 void
1605 updatetitle(Client *c) {
1606 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1607 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1608 }
1609
1610 void
1611 updatestatus() {
1612 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1613 strcpy(stext, "dwm-"VERSION);
1614 drawbar();
1615 }
1616
1617 void
1618 updatewmhints(Client *c) {
1619 XWMHints *wmh;
1620
1621 if((wmh = XGetWMHints(dpy, c->win))) {
1622 if(c == sel && wmh->flags & XUrgencyHint) {
1623 wmh->flags &= ~XUrgencyHint;
1624 XSetWMHints(dpy, c->win, wmh);
1625 }
1626 else
1627 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1628
1629 XFree(wmh);
1630 }
1631 }
1632
1633 void
1634 view(const Arg *arg) {
1635 if((arg->ui & TAGMASK) == tagset[seltags])
1636 return;
1637 seltags ^= 1; /* toggle sel tagset */
1638 if(arg->ui & TAGMASK)
1639 tagset[seltags] = arg->ui & TAGMASK;
1640 arrange();
1641 }
1642
1643 /* There's no way to check accesses to destroyed windows, thus those cases are
1644 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1645 * default error handler, which may call exit. */
1646 int
1647 xerror(Display *dpy, XErrorEvent *ee) {
1648 if(ee->error_code == BadWindow
1649 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1650 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1651 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1652 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1653 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1654 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1655 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1656 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1657 return 0;
1658 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1659 ee->request_code, ee->error_code);
1660 return xerrorxlib(dpy, ee); /* may call exit */
1661 }
1662
1663 int
1664 xerrordummy(Display *dpy, XErrorEvent *ee) {
1665 return 0;
1666 }
1667
1668 /* Startup Error handler to check if another window manager
1669 * is already running. */
1670 int
1671 xerrorstart(Display *dpy, XErrorEvent *ee) {
1672 otherwm = True;
1673 return -1;
1674 }
1675
1676 void
1677 zoom(const Arg *arg) {
1678 Client *c = sel;
1679
1680 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1681 return;
1682 if(c == nexttiled(clients))
1683 if(!c || !(c = nexttiled(c->next)))
1684 return;
1685 detach(c);
1686 attach(c);
1687 focus(c);
1688 arrange();
1689 }
1690
1691 int
1692 main(int argc, char *argv[]) {
1693 if(argc == 2 && !strcmp("-v", argv[1]))
1694 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1695 else if(argc != 1)
1696 die("usage: dwm [-v]\n");
1697
1698 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1699 fputs("warning: no locale support\n", stderr);
1700
1701 if(!(dpy = XOpenDisplay(NULL)))
1702 die("dwm: cannot open display\n");
1703
1704 checkotherwm();
1705 setup();
1706 scan();
1707 run();
1708 cleanup();
1709
1710 XCloseDisplay(dpy);
1711 return 0;
1712 }