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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, unsigned int ntiled);
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 unsigned int nt;
342 Client *c;
343
344 for(nt = 0, c = nexttiled(clients); c; c = nexttiled(c->next), nt++);
345 showhide(stack, nt);
346 focus(NULL);
347 if(lt[sellt]->arrange)
348 lt[sellt]->arrange();
349 restack();
350 }
351
352 void
353 attach(Client *c) {
354 c->next = clients;
355 clients = c;
356 }
357
358 void
359 attachstack(Client *c) {
360 c->snext = stack;
361 stack = c;
362 }
363
364 void
365 buttonpress(XEvent *e) {
366 unsigned int i, x, click;
367 Arg arg = {0};
368 Client *c;
369 XButtonPressedEvent *ev = &e->xbutton;
370
371 click = ClkRootWin;
372 if(ev->window == barwin) {
373 i = x = 0;
374 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
375 if(i < LENGTH(tags)) {
376 click = ClkTagBar;
377 arg.ui = 1 << i;
378 }
379 else if(ev->x < x + blw)
380 click = ClkLtSymbol;
381 else if(ev->x > wx + ww - TEXTW(stext))
382 click = ClkStatusText;
383 else
384 click = ClkWinTitle;
385 }
386 else if((c = getclient(ev->window))) {
387 focus(c);
388 click = ClkClientWin;
389 }
390
391 for(i = 0; i < LENGTH(buttons); i++)
392 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
393 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
394 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
395 }
396
397 void
398 checkotherwm(void) {
399 otherwm = False;
400 xerrorxlib = XSetErrorHandler(xerrorstart);
401
402 /* this causes an error if some other window manager is running */
403 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
404 XSync(dpy, False);
405 if(otherwm)
406 die("dwm: another window manager is already running\n");
407 XSetErrorHandler(xerror);
408 XSync(dpy, False);
409 }
410
411 void
412 cleanup(void) {
413 Arg a = {.ui = ~0};
414 Layout foo = { "", NULL };
415
416 view(&a);
417 lt[sellt] = &foo;
418 while(stack)
419 unmanage(stack);
420 if(dc.font.set)
421 XFreeFontSet(dpy, dc.font.set);
422 else
423 XFreeFont(dpy, dc.font.xfont);
424 XUngrabKey(dpy, AnyKey, AnyModifier, root);
425 XFreePixmap(dpy, dc.drawable);
426 XFreeGC(dpy, dc.gc);
427 XFreeCursor(dpy, cursor[CurNormal]);
428 XFreeCursor(dpy, cursor[CurResize]);
429 XFreeCursor(dpy, cursor[CurMove]);
430 XDestroyWindow(dpy, barwin);
431 XSync(dpy, False);
432 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
433 }
434
435 void
436 clearurgent(Client *c) {
437 XWMHints *wmh;
438
439 c->isurgent = False;
440 if(!(wmh = XGetWMHints(dpy, c->win)))
441 return;
442 wmh->flags &= ~XUrgencyHint;
443 XSetWMHints(dpy, c->win, wmh);
444 XFree(wmh);
445 }
446
447 void
448 configure(Client *c) {
449 XConfigureEvent ce;
450
451 ce.type = ConfigureNotify;
452 ce.display = dpy;
453 ce.event = c->win;
454 ce.window = c->win;
455 ce.x = c->x;
456 ce.y = c->y;
457 ce.width = c->w;
458 ce.height = c->h;
459 ce.border_width = c->bw;
460 ce.above = None;
461 ce.override_redirect = False;
462 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
463 }
464
465 void
466 configurenotify(XEvent *e) {
467 XConfigureEvent *ev = &e->xconfigure;
468
469 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
470 sw = ev->width;
471 sh = ev->height;
472 updategeom();
473 updatebar();
474 arrange();
475 }
476 }
477
478 void
479 configurerequest(XEvent *e) {
480 Client *c;
481 XConfigureRequestEvent *ev = &e->xconfigurerequest;
482 XWindowChanges wc;
483
484 if((c = getclient(ev->window))) {
485 if(ev->value_mask & CWBorderWidth)
486 c->bw = ev->border_width;
487 else if(c->isfloating || !lt[sellt]->arrange) {
488 if(ev->value_mask & CWX)
489 c->x = sx + ev->x;
490 if(ev->value_mask & CWY)
491 c->y = sy + ev->y;
492 if(ev->value_mask & CWWidth)
493 c->w = ev->width;
494 if(ev->value_mask & CWHeight)
495 c->h = ev->height;
496 if((c->x - sx + c->w) > sw && c->isfloating)
497 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
498 if((c->y - sy + c->h) > sh && c->isfloating)
499 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
500 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
501 configure(c);
502 if(ISVISIBLE(c))
503 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
504 }
505 else
506 configure(c);
507 }
508 else {
509 wc.x = ev->x;
510 wc.y = ev->y;
511 wc.width = ev->width;
512 wc.height = ev->height;
513 wc.border_width = ev->border_width;
514 wc.sibling = ev->above;
515 wc.stack_mode = ev->detail;
516 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
517 }
518 XSync(dpy, False);
519 }
520
521 void
522 destroynotify(XEvent *e) {
523 Client *c;
524 XDestroyWindowEvent *ev = &e->xdestroywindow;
525
526 if((c = getclient(ev->window)))
527 unmanage(c);
528 }
529
530 void
531 detach(Client *c) {
532 Client **tc;
533
534 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
535 *tc = c->next;
536 }
537
538 void
539 detachstack(Client *c) {
540 Client **tc;
541
542 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
543 *tc = c->snext;
544 }
545
546 void
547 die(const char *errstr, ...) {
548 va_list ap;
549
550 va_start(ap, errstr);
551 vfprintf(stderr, errstr, ap);
552 va_end(ap);
553 exit(EXIT_FAILURE);
554 }
555
556 void
557 drawbar(void) {
558 int x;
559 unsigned int i, occ = 0, urg = 0;
560 unsigned long *col;
561 Client *c;
562
563 for(c = clients; c; c = c->next) {
564 occ |= c->tags;
565 if(c->isurgent)
566 urg |= c->tags;
567 }
568
569 dc.x = 0;
570 for(i = 0; i < LENGTH(tags); i++) {
571 dc.w = TEXTW(tags[i]);
572 col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
573 drawtext(tags[i], col, urg & 1 << i);
574 drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
575 dc.x += dc.w;
576 }
577 if(blw > 0) {
578 dc.w = blw;
579 drawtext(lt[sellt]->symbol, dc.norm, False);
580 x = dc.x + dc.w;
581 }
582 else
583 x = dc.x;
584 dc.w = TEXTW(stext);
585 dc.x = ww - dc.w;
586 if(dc.x < x) {
587 dc.x = x;
588 dc.w = ww - x;
589 }
590 drawtext(stext, dc.norm, False);
591 if((dc.w = dc.x - x) > bh) {
592 dc.x = x;
593 if(sel) {
594 drawtext(sel->name, dc.sel, False);
595 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
596 }
597 else
598 drawtext(NULL, dc.norm, False);
599 }
600 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
601 XSync(dpy, False);
602 }
603
604 void
605 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
606 int x;
607 XGCValues gcv;
608 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
609
610 gcv.foreground = col[invert ? ColBG : ColFG];
611 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
612 x = (dc.font.ascent + dc.font.descent + 2) / 4;
613 r.x = dc.x + 1;
614 r.y = dc.y + 1;
615 if(filled) {
616 r.width = r.height = x + 1;
617 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
618 }
619 else if(empty) {
620 r.width = r.height = x;
621 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
622 }
623 }
624
625 void
626 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
627 char buf[256];
628 int i, x, y, h, len, olen;
629 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
630
631 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
632 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
633 if(!text)
634 return;
635 olen = strlen(text);
636 h = dc.font.ascent + dc.font.descent;
637 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
638 x = dc.x + (h / 2);
639 /* shorten text if necessary */
640 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
641 if(!len)
642 return;
643 memcpy(buf, text, len);
644 if(len < olen)
645 for(i = len; i && i > len - 3; buf[--i] = '.');
646 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
647 if(dc.font.set)
648 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
649 else
650 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
651 }
652
653 void
654 enternotify(XEvent *e) {
655 Client *c;
656 XCrossingEvent *ev = &e->xcrossing;
657
658 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
659 return;
660 if((c = getclient(ev->window)))
661 focus(c);
662 else
663 focus(NULL);
664 }
665
666 void
667 expose(XEvent *e) {
668 XExposeEvent *ev = &e->xexpose;
669
670 if(ev->count == 0 && (ev->window == barwin))
671 drawbar();
672 }
673
674 void
675 focus(Client *c) {
676 if(!c || !ISVISIBLE(c))
677 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
678 if(sel && sel != c) {
679 grabbuttons(sel, False);
680 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
681 }
682 if(c) {
683 if(c->isurgent)
684 clearurgent(c);
685 detachstack(c);
686 attachstack(c);
687 grabbuttons(c, True);
688 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
689 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
690 }
691 else
692 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
693 sel = c;
694 drawbar();
695 }
696
697 void
698 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
699 XFocusChangeEvent *ev = &e->xfocus;
700
701 if(sel && ev->window != sel->win)
702 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
703 }
704
705 void
706 focusstack(const Arg *arg) {
707 Client *c = NULL, *i;
708
709 if(!sel)
710 return;
711 if (arg->i > 0) {
712 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
713 if(!c)
714 for(c = clients; c && !ISVISIBLE(c); c = c->next);
715 }
716 else {
717 for(i = clients; i != sel; i = i->next)
718 if(ISVISIBLE(i))
719 c = i;
720 if(!c)
721 for(; i; i = i->next)
722 if(ISVISIBLE(i))
723 c = i;
724 }
725 if(c) {
726 focus(c);
727 restack();
728 }
729 }
730
731 Client *
732 getclient(Window w) {
733 Client *c;
734
735 for(c = clients; c && c->win != w; c = c->next);
736 return c;
737 }
738
739 unsigned long
740 getcolor(const char *colstr) {
741 Colormap cmap = DefaultColormap(dpy, screen);
742 XColor color;
743
744 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
745 die("error, cannot allocate color '%s'\n", colstr);
746 return color.pixel;
747 }
748
749 long
750 getstate(Window w) {
751 int format, status;
752 long result = -1;
753 unsigned char *p = NULL;
754 unsigned long n, extra;
755 Atom real;
756
757 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
758 &real, &format, &n, &extra, (unsigned char **)&p);
759 if(status != Success)
760 return -1;
761 if(n != 0)
762 result = *p;
763 XFree(p);
764 return result;
765 }
766
767 Bool
768 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
769 char **list = NULL;
770 int n;
771 XTextProperty name;
772
773 if(!text || size == 0)
774 return False;
775 text[0] = '\0';
776 XGetTextProperty(dpy, w, &name, atom);
777 if(!name.nitems)
778 return False;
779 if(name.encoding == XA_STRING)
780 strncpy(text, (char *)name.value, size - 1);
781 else {
782 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
783 && n > 0 && *list) {
784 strncpy(text, *list, size - 1);
785 XFreeStringList(list);
786 }
787 }
788 text[size - 1] = '\0';
789 XFree(name.value);
790 return True;
791 }
792
793 void
794 grabbuttons(Client *c, Bool focused) {
795 updatenumlockmask();
796 {
797 unsigned int i, j;
798 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
799 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
800 if(focused) {
801 for(i = 0; i < LENGTH(buttons); i++)
802 if(buttons[i].click == ClkClientWin)
803 for(j = 0; j < LENGTH(modifiers); j++)
804 XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
805 } else
806 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
807 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
808 }
809 }
810
811 void
812 grabkeys(void) {
813 updatenumlockmask();
814 { /* grab keys */
815 unsigned int i, j;
816 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
817 KeyCode code;
818
819 XUngrabKey(dpy, AnyKey, AnyModifier, root);
820 for(i = 0; i < LENGTH(keys); i++) {
821 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
822 for(j = 0; j < LENGTH(modifiers); j++)
823 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
824 True, GrabModeAsync, GrabModeAsync);
825 }
826 }
827 }
828
829 void
830 initfont(const char *fontstr) {
831 char *def, **missing;
832 int i, n;
833
834 missing = NULL;
835 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
836 if(missing) {
837 while(n--)
838 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
839 XFreeStringList(missing);
840 }
841 if(dc.font.set) {
842 XFontSetExtents *font_extents;
843 XFontStruct **xfonts;
844 char **font_names;
845 dc.font.ascent = dc.font.descent = 0;
846 font_extents = XExtentsOfFontSet(dc.font.set);
847 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
848 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
849 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
850 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
851 xfonts++;
852 }
853 }
854 else {
855 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
856 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
857 die("error, cannot load font: '%s'\n", fontstr);
858 dc.font.ascent = dc.font.xfont->ascent;
859 dc.font.descent = dc.font.xfont->descent;
860 }
861 dc.font.height = dc.font.ascent + dc.font.descent;
862 }
863
864 Bool
865 isprotodel(Client *c) {
866 int i, n;
867 Atom *protocols;
868 Bool ret = False;
869
870 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
871 for(i = 0; !ret && i < n; i++)
872 if(protocols[i] == wmatom[WMDelete])
873 ret = True;
874 XFree(protocols);
875 }
876 return ret;
877 }
878
879 void
880 keypress(XEvent *e) {
881 unsigned int i;
882 KeySym keysym;
883 XKeyEvent *ev;
884
885 ev = &e->xkey;
886 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
887 for(i = 0; i < LENGTH(keys); i++)
888 if(keysym == keys[i].keysym
889 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
890 && keys[i].func)
891 keys[i].func(&(keys[i].arg));
892 }
893
894 void
895 killclient(const Arg *arg) {
896 XEvent ev;
897
898 if(!sel)
899 return;
900 if(isprotodel(sel)) {
901 ev.type = ClientMessage;
902 ev.xclient.window = sel->win;
903 ev.xclient.message_type = wmatom[WMProtocols];
904 ev.xclient.format = 32;
905 ev.xclient.data.l[0] = wmatom[WMDelete];
906 ev.xclient.data.l[1] = CurrentTime;
907 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
908 }
909 else
910 XKillClient(dpy, sel->win);
911 }
912
913 void
914 manage(Window w, XWindowAttributes *wa) {
915 static Client cz;
916 Client *c, *t = NULL;
917 Window trans = None;
918 XWindowChanges wc;
919
920 if(!(c = malloc(sizeof(Client))))
921 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
922 *c = cz;
923 c->win = w;
924
925 /* geometry */
926 c->x = wa->x;
927 c->y = wa->y;
928 c->w = wa->width;
929 c->h = wa->height;
930 c->oldbw = wa->border_width;
931 if(c->w == sw && c->h == sh) {
932 c->x = sx;
933 c->y = sy;
934 c->bw = 0;
935 }
936 else {
937 if(c->x + WIDTH(c) > sx + sw)
938 c->x = sx + sw - WIDTH(c);
939 if(c->y + HEIGHT(c) > sy + sh)
940 c->y = sy + sh - HEIGHT(c);
941 c->x = MAX(c->x, sx);
942 /* only fix client y-offset, if the client center might cover the bar */
943 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (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 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1043 togglefloating(NULL);
1044 }
1045 if(!lt[sellt]->arrange || c->isfloating)
1046 resize(c, nx, ny, c->w, c->h);
1047 break;
1048 }
1049 }
1050 while(ev.type != ButtonRelease);
1051 XUngrabPointer(dpy, CurrentTime);
1052 }
1053
1054 Client *
1055 nexttiled(Client *c) {
1056 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1057 return c;
1058 }
1059
1060 void
1061 propertynotify(XEvent *e) {
1062 Client *c;
1063 Window trans;
1064 XPropertyEvent *ev = &e->xproperty;
1065
1066 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1067 updatestatus();
1068 else if(ev->state == PropertyDelete)
1069 return; /* ignore */
1070 else if((c = getclient(ev->window))) {
1071 switch (ev->atom) {
1072 default: break;
1073 case XA_WM_TRANSIENT_FOR:
1074 XGetTransientForHint(dpy, c->win, &trans);
1075 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1076 arrange();
1077 break;
1078 case XA_WM_NORMAL_HINTS:
1079 updatesizehints(c);
1080 break;
1081 case XA_WM_HINTS:
1082 updatewmhints(c);
1083 drawbar();
1084 break;
1085 }
1086 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1087 updatetitle(c);
1088 if(c == sel)
1089 drawbar();
1090 }
1091 }
1092 }
1093
1094 void
1095 quit(const Arg *arg) {
1096 running = False;
1097 }
1098
1099 void
1100 resize(Client *c, int x, int y, int w, int h) {
1101 XWindowChanges wc;
1102
1103 if(applysizehints(c, &x, &y, &w, &h)) {
1104 c->x = wc.x = x;
1105 c->y = wc.y = y;
1106 c->w = wc.width = w;
1107 c->h = wc.height = h;
1108 wc.border_width = c->bw;
1109 XConfigureWindow(dpy, c->win,
1110 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1111 configure(c);
1112 XSync(dpy, False);
1113 }
1114 }
1115
1116 void
1117 resizemouse(const Arg *arg) {
1118 int ocx, ocy;
1119 int nw, nh;
1120 Client *c;
1121 XEvent ev;
1122
1123 if(!(c = sel))
1124 return;
1125 restack();
1126 ocx = c->x;
1127 ocy = c->y;
1128 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1129 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1130 return;
1131 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1132 do {
1133 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1134 switch(ev.type) {
1135 case ConfigureRequest:
1136 case Expose:
1137 case MapRequest:
1138 handler[ev.type](&ev);
1139 break;
1140 case MotionNotify:
1141 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1142 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1143
1144 if(snap && nw >= wx && nw <= wx + ww
1145 && nh >= wy && nh <= wy + wh) {
1146 if(!c->isfloating && lt[sellt]->arrange
1147 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1148 togglefloating(NULL);
1149 }
1150 if(!lt[sellt]->arrange || c->isfloating)
1151 resize(c, c->x, c->y, nw, nh);
1152 break;
1153 }
1154 }
1155 while(ev.type != ButtonRelease);
1156 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1157 XUngrabPointer(dpy, CurrentTime);
1158 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1159 }
1160
1161 void
1162 restack(void) {
1163 Client *c;
1164 XEvent ev;
1165 XWindowChanges wc;
1166
1167 drawbar();
1168 if(!sel)
1169 return;
1170 if(sel->isfloating || !lt[sellt]->arrange)
1171 XRaiseWindow(dpy, sel->win);
1172 if(lt[sellt]->arrange) {
1173 wc.stack_mode = Below;
1174 wc.sibling = barwin;
1175 for(c = stack; c; c = c->snext)
1176 if(!c->isfloating && ISVISIBLE(c)) {
1177 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1178 wc.sibling = c->win;
1179 }
1180 }
1181 XSync(dpy, False);
1182 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1183 }
1184
1185 void
1186 run(void) {
1187 XEvent ev;
1188
1189 /* main event loop */
1190 XSync(dpy, False);
1191 while(running && !XNextEvent(dpy, &ev)) {
1192 if(handler[ev.type])
1193 (handler[ev.type])(&ev); /* call handler */
1194 }
1195 }
1196
1197 void
1198 scan(void) {
1199 unsigned int i, num;
1200 Window d1, d2, *wins = NULL;
1201 XWindowAttributes wa;
1202
1203 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1204 for(i = 0; i < num; i++) {
1205 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1206 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1207 continue;
1208 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1209 manage(wins[i], &wa);
1210 }
1211 for(i = 0; i < num; i++) { /* now the transients */
1212 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1213 continue;
1214 if(XGetTransientForHint(dpy, wins[i], &d1)
1215 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1216 manage(wins[i], &wa);
1217 }
1218 if(wins)
1219 XFree(wins);
1220 }
1221 }
1222
1223 void
1224 setclientstate(Client *c, long state) {
1225 long data[] = {state, None};
1226
1227 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1228 PropModeReplace, (unsigned char *)data, 2);
1229 }
1230
1231 void
1232 setlayout(const Arg *arg) {
1233 if(!arg || !arg->v || arg->v != lt[sellt])
1234 sellt ^= 1;
1235 if(arg && arg->v)
1236 lt[sellt] = (Layout *)arg->v;
1237 if(sel)
1238 arrange();
1239 else
1240 drawbar();
1241 }
1242
1243 /* arg > 1.0 will set mfact absolutly */
1244 void
1245 setmfact(const Arg *arg) {
1246 float f;
1247
1248 if(!arg || !lt[sellt]->arrange)
1249 return;
1250 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1251 if(f < 0.1 || f > 0.9)
1252 return;
1253 mfact = f;
1254 arrange();
1255 }
1256
1257 void
1258 setup(void) {
1259 unsigned int i;
1260 int w;
1261 XSetWindowAttributes wa;
1262
1263 /* init screen */
1264 screen = DefaultScreen(dpy);
1265 root = RootWindow(dpy, screen);
1266 initfont(font);
1267 sx = 0;
1268 sy = 0;
1269 sw = DisplayWidth(dpy, screen);
1270 sh = DisplayHeight(dpy, screen);
1271 bh = dc.h = dc.font.height + 2;
1272 lt[0] = &layouts[0];
1273 lt[1] = &layouts[1 % LENGTH(layouts)];
1274 updategeom();
1275
1276 /* init atoms */
1277 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1278 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1279 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1280 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1281 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1282
1283 /* init cursors */
1284 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1285 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1286 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1287
1288 /* init appearance */
1289 dc.norm[ColBorder] = getcolor(normbordercolor);
1290 dc.norm[ColBG] = getcolor(normbgcolor);
1291 dc.norm[ColFG] = getcolor(normfgcolor);
1292 dc.sel[ColBorder] = getcolor(selbordercolor);
1293 dc.sel[ColBG] = getcolor(selbgcolor);
1294 dc.sel[ColFG] = getcolor(selfgcolor);
1295 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1296 dc.gc = XCreateGC(dpy, root, 0, NULL);
1297 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1298 if(!dc.font.set)
1299 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1300
1301 /* init bar */
1302 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1303 w = TEXTW(layouts[i].symbol);
1304 blw = MAX(blw, w);
1305 }
1306
1307 wa.override_redirect = True;
1308 wa.background_pixmap = ParentRelative;
1309 wa.event_mask = ButtonPressMask|ExposureMask;
1310
1311 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1312 CopyFromParent, DefaultVisual(dpy, screen),
1313 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1314 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1315 XMapRaised(dpy, barwin);
1316 updatestatus();
1317
1318 /* EWMH support per view */
1319 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1320 PropModeReplace, (unsigned char *) netatom, NetLast);
1321
1322 /* select for events */
1323 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1324 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1325 |PropertyChangeMask;
1326 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1327 XSelectInput(dpy, root, wa.event_mask);
1328
1329 grabkeys();
1330 }
1331
1332 void
1333 showhide(Client *c, unsigned int ntiled) {
1334 if(!c)
1335 return;
1336 if(ISVISIBLE(c)) { /* show clients top down */
1337 XMoveWindow(dpy, c->win, c->x, c->y);
1338 if(!lt[sellt]->arrange || c->isfloating)
1339 resize(c, c->x, c->y, c->w, c->h);
1340 showhide(c->snext, ntiled);
1341 }
1342 else { /* hide clients bottom up */
1343 showhide(c->snext, ntiled);
1344 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1345 }
1346 }
1347
1348
1349 void
1350 sigchld(int signal) {
1351 while(0 < waitpid(-1, NULL, WNOHANG));
1352 }
1353
1354 void
1355 spawn(const Arg *arg) {
1356 signal(SIGCHLD, sigchld);
1357 if(fork() == 0) {
1358 if(dpy)
1359 close(ConnectionNumber(dpy));
1360 setsid();
1361 execvp(((char **)arg->v)[0], (char **)arg->v);
1362 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1363 perror(" failed");
1364 exit(0);
1365 }
1366 }
1367
1368 void
1369 tag(const Arg *arg) {
1370 if(sel && arg->ui & TAGMASK) {
1371 sel->tags = arg->ui & TAGMASK;
1372 arrange();
1373 }
1374 }
1375
1376 int
1377 textnw(const char *text, unsigned int len) {
1378 XRectangle r;
1379
1380 if(dc.font.set) {
1381 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1382 return r.width;
1383 }
1384 return XTextWidth(dc.font.xfont, text, len);
1385 }
1386
1387 void
1388 tile(void) {
1389 int x, y, h, w, mw;
1390 unsigned int i, n;
1391 Client *c;
1392
1393 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1394 if(n == 0)
1395 return;
1396
1397 /* master */
1398 c = nexttiled(clients);
1399 mw = mfact * ww;
1400 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw);
1401
1402 if(--n == 0)
1403 return;
1404
1405 /* tile stack */
1406 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1407 y = wy;
1408 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1409 h = wh / n;
1410 if(h < bh)
1411 h = wh;
1412
1413 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1414 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1415 ? wy + wh - y - 2 * c->bw : h - 2 * c->bw));
1416 if(h != wh)
1417 y = c->y + HEIGHT(c);
1418 }
1419 }
1420
1421 void
1422 togglebar(const Arg *arg) {
1423 showbar = !showbar;
1424 updategeom();
1425 updatebar();
1426 arrange();
1427 }
1428
1429 void
1430 togglefloating(const Arg *arg) {
1431 if(!sel)
1432 return;
1433 sel->isfloating = !sel->isfloating || sel->isfixed;
1434 if(sel->isfloating)
1435 resize(sel, sel->x, sel->y, sel->w, sel->h);
1436 arrange();
1437 }
1438
1439 void
1440 toggletag(const Arg *arg) {
1441 unsigned int mask;
1442
1443 if (!sel)
1444 return;
1445
1446 mask = sel->tags ^ (arg->ui & TAGMASK);
1447 if(mask) {
1448 sel->tags = mask;
1449 arrange();
1450 }
1451 }
1452
1453 void
1454 toggleview(const Arg *arg) {
1455 unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1456
1457 if(mask) {
1458 tagset[seltags] = mask;
1459 arrange();
1460 }
1461 }
1462
1463 void
1464 unmanage(Client *c) {
1465 XWindowChanges wc;
1466
1467 wc.border_width = c->oldbw;
1468 /* The server grab construct avoids race conditions. */
1469 XGrabServer(dpy);
1470 XSetErrorHandler(xerrordummy);
1471 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1472 detach(c);
1473 detachstack(c);
1474 if(sel == c)
1475 focus(NULL);
1476 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1477 setclientstate(c, WithdrawnState);
1478 free(c);
1479 XSync(dpy, False);
1480 XSetErrorHandler(xerror);
1481 XUngrabServer(dpy);
1482 arrange();
1483 }
1484
1485 void
1486 unmapnotify(XEvent *e) {
1487 Client *c;
1488 XUnmapEvent *ev = &e->xunmap;
1489
1490 if((c = getclient(ev->window)))
1491 unmanage(c);
1492 }
1493
1494 void
1495 updatebar(void) {
1496 if(dc.drawable != 0)
1497 XFreePixmap(dpy, dc.drawable);
1498 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1499 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1500 }
1501
1502 void
1503 updategeom(void) {
1504 #ifdef XINERAMA
1505 int n, i = 0;
1506 XineramaScreenInfo *info = NULL;
1507
1508 /* window area geometry */
1509 if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
1510 if(n > 1) {
1511 int di, x, y;
1512 unsigned int dui;
1513 Window dummy;
1514 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1515 for(i = 0; i < n; i++)
1516 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
1517 break;
1518 }
1519 wx = info[i].x_org;
1520 wy = showbar && topbar ? info[i].y_org + bh : info[i].y_org;
1521 ww = info[i].width;
1522 wh = showbar ? info[i].height - bh : info[i].height;
1523 XFree(info);
1524 }
1525 else
1526 #endif
1527 {
1528 wx = sx;
1529 wy = showbar && topbar ? sy + bh : sy;
1530 ww = sw;
1531 wh = showbar ? sh - bh : sh;
1532 }
1533
1534 /* bar position */
1535 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1536 }
1537
1538 void
1539 updatenumlockmask(void) {
1540 unsigned int i, j;
1541 XModifierKeymap *modmap;
1542
1543 numlockmask = 0;
1544 modmap = XGetModifierMapping(dpy);
1545 for(i = 0; i < 8; i++)
1546 for(j = 0; j < modmap->max_keypermod; j++)
1547 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
1548 numlockmask = (1 << i);
1549 XFreeModifiermap(modmap);
1550 }
1551
1552 void
1553 updatesizehints(Client *c) {
1554 long msize;
1555 XSizeHints size;
1556
1557 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1558 /* size is uninitialized, ensure that size.flags aren't used */
1559 size.flags = PSize;
1560 if(size.flags & PBaseSize) {
1561 c->basew = size.base_width;
1562 c->baseh = size.base_height;
1563 }
1564 else if(size.flags & PMinSize) {
1565 c->basew = size.min_width;
1566 c->baseh = size.min_height;
1567 }
1568 else
1569 c->basew = c->baseh = 0;
1570 if(size.flags & PResizeInc) {
1571 c->incw = size.width_inc;
1572 c->inch = size.height_inc;
1573 }
1574 else
1575 c->incw = c->inch = 0;
1576 if(size.flags & PMaxSize) {
1577 c->maxw = size.max_width;
1578 c->maxh = size.max_height;
1579 }
1580 else
1581 c->maxw = c->maxh = 0;
1582 if(size.flags & PMinSize) {
1583 c->minw = size.min_width;
1584 c->minh = size.min_height;
1585 }
1586 else if(size.flags & PBaseSize) {
1587 c->minw = size.base_width;
1588 c->minh = size.base_height;
1589 }
1590 else
1591 c->minw = c->minh = 0;
1592 if(size.flags & PAspect) {
1593 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1594 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1595 }
1596 else
1597 c->maxa = c->mina = 0.0;
1598 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1599 && c->maxw == c->minw && c->maxh == c->minh);
1600 }
1601
1602 void
1603 updatetitle(Client *c) {
1604 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1605 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1606 }
1607
1608 void
1609 updatestatus() {
1610 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1611 strcpy(stext, "dwm-"VERSION);
1612 drawbar();
1613 }
1614
1615 void
1616 updatewmhints(Client *c) {
1617 XWMHints *wmh;
1618
1619 if((wmh = XGetWMHints(dpy, c->win))) {
1620 if(c == sel && wmh->flags & XUrgencyHint) {
1621 wmh->flags &= ~XUrgencyHint;
1622 XSetWMHints(dpy, c->win, wmh);
1623 }
1624 else
1625 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1626
1627 XFree(wmh);
1628 }
1629 }
1630
1631 void
1632 view(const Arg *arg) {
1633 if((arg->ui & TAGMASK) == tagset[seltags])
1634 return;
1635 seltags ^= 1; /* toggle sel tagset */
1636 if(arg->ui & TAGMASK)
1637 tagset[seltags] = arg->ui & TAGMASK;
1638 arrange();
1639 }
1640
1641 /* There's no way to check accesses to destroyed windows, thus those cases are
1642 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1643 * default error handler, which may call exit. */
1644 int
1645 xerror(Display *dpy, XErrorEvent *ee) {
1646 if(ee->error_code == BadWindow
1647 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1648 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1649 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1650 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1651 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1652 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1653 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1654 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1655 return 0;
1656 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1657 ee->request_code, ee->error_code);
1658 return xerrorxlib(dpy, ee); /* may call exit */
1659 }
1660
1661 int
1662 xerrordummy(Display *dpy, XErrorEvent *ee) {
1663 return 0;
1664 }
1665
1666 /* Startup Error handler to check if another window manager
1667 * is already running. */
1668 int
1669 xerrorstart(Display *dpy, XErrorEvent *ee) {
1670 otherwm = True;
1671 return -1;
1672 }
1673
1674 void
1675 zoom(const Arg *arg) {
1676 Client *c = sel;
1677
1678 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1679 return;
1680 if(c == nexttiled(clients))
1681 if(!c || !(c = nexttiled(c->next)))
1682 return;
1683 detach(c);
1684 attach(c);
1685 focus(c);
1686 arrange();
1687 }
1688
1689 int
1690 main(int argc, char *argv[]) {
1691 if(argc == 2 && !strcmp("-v", argv[1]))
1692 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1693 else if(argc != 1)
1694 die("usage: dwm [-v]\n");
1695
1696 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1697 fputs("warning: no locale support\n", stderr);
1698
1699 if(!(dpy = XOpenDisplay(NULL)))
1700 die("dwm: cannot open display\n");
1701
1702 checkotherwm();
1703 setup();
1704 scan();
1705 run();
1706 cleanup();
1707
1708 XCloseDisplay(dpy);
1709 return 0;
1710 }