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[dwm.git] / dwm.c
1 /* TODO: cleanup nexttiled, ISVISIBLE, etc */
2 /* See LICENSE file for copyright and license details.
3 *
4 * dynamic window manager is designed like any other X client as well. It is
5 * driven through handling X events. In contrast to other X clients, a window
6 * manager selects for SubstructureRedirectMask on the root window, to receive
7 * events about window (dis-)appearance. Only one X connection at a time is
8 * allowed to select for this event mask.
9 *
10 * The event handlers of dwm are organized in an array which is accessed
11 * whenever a new event has been fetched. This allows event dispatching
12 * in O(1) time.
13 *
14 * Each child of the root window is called a client, except windows which have
15 * set the override_redirect flag. Clients are organized in a global
16 * linked client list, the focus history is remembered through a global
17 * stack list. Each client contains a bit array to indicate the tags of a
18 * client.
19 *
20 * Keys and tagging rules are organized as arrays and defined in config.h.
21 *
22 * To understand everything else, start reading main().
23 */
24 #include <errno.h>
25 #include <locale.h>
26 #include <stdarg.h>
27 #include <signal.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
32 #include <sys/types.h>
33 #include <sys/wait.h>
34 #include <X11/cursorfont.h>
35 #include <X11/keysym.h>
36 #include <X11/Xatom.h>
37 #include <X11/Xlib.h>
38 #include <X11/Xproto.h>
39 #include <X11/Xutil.h>
40 #ifdef XINERAMA
41 #include <X11/extensions/Xinerama.h>
42 #endif /* XINERAMA */
43
44 /* macros */
45 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
46 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
47 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
48 #define ISVISIBLE(M, C) ((M) == (C->mon) && (C->tags & M->tagset[M->seltags]))
49 #define LENGTH(X) (sizeof X / sizeof X[0])
50 #define MAX(A, B) ((A) > (B) ? (A) : (B))
51 #define MIN(A, B) ((A) < (B) ? (A) : (B))
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 Monitor Monitor;
82 typedef struct Client Client;
83 struct Client {
84 char name[256];
85 float mina, maxa;
86 int x, y, w, h;
87 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
88 int bw, oldbw;
89 unsigned int tags;
90 Bool isfixed, isfloating, isurgent;
91 Client *next;
92 Client *snext;
93 Monitor *mon;
94 Window win;
95 };
96
97 typedef struct {
98 int x, y, w, h;
99 unsigned long norm[ColLast];
100 unsigned long sel[ColLast];
101 Drawable drawable;
102 GC gc;
103 struct {
104 int ascent;
105 int descent;
106 int height;
107 XFontSet set;
108 XFontStruct *xfont;
109 } font;
110 } DC; /* draw context */
111
112 typedef struct {
113 unsigned int mod;
114 KeySym keysym;
115 void (*func)(const Arg *);
116 const Arg arg;
117 } Key;
118
119 typedef struct {
120 const char *symbol;
121 void (*arrange)(Monitor *);
122 } Layout;
123
124 struct Monitor {
125 int screen_number;
126 float mfact;
127 int by, btx; /* bar geometry */
128 int my, mh; /* vertical screen size*/
129 int wx, wy, ww, wh; /* window area */
130 unsigned int seltags;
131 unsigned int sellt;
132 unsigned int tagset[2];
133 Bool showbar;
134 Bool topbar;
135 Client *clients;
136 Client *sel;
137 Client *stack;
138 Monitor *next;
139 Window barwin;
140 };
141
142 typedef struct {
143 const char *class;
144 const char *instance;
145 const char *title;
146 unsigned int tags;
147 Bool isfloating;
148 } Rule;
149
150 /* function declarations */
151 static void applyrules(Client *c);
152 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h);
153 static void arrange(void);
154 static void attach(Client *c);
155 static void attachstack(Client *c);
156 static void buttonpress(XEvent *e);
157 static void checkotherwm(void);
158 static void cleanup(void);
159 static void cleanupmons(void);
160 static void clearurgent(Client *c);
161 static void configure(Client *c);
162 static void configurenotify(XEvent *e);
163 static void configurerequest(XEvent *e);
164 static void destroynotify(XEvent *e);
165 static void detach(Client *c);
166 static void detachstack(Client *c);
167 static void die(const char *errstr, ...);
168 static void drawbar(Monitor *m);
169 static void drawbars();
170 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
171 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
172 static void enternotify(XEvent *e);
173 static void expose(XEvent *e);
174 static void focus(Client *c);
175 static void focusin(XEvent *e);
176 static void focusstack(const Arg *arg);
177 static Client *getclient(Window w);
178 static unsigned long getcolor(const char *colstr);
179 static long getstate(Window w);
180 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
181 static void grabbuttons(Client *c, Bool focused);
182 static void grabkeys(void);
183 static void initfont(const char *fontstr);
184 static Bool isprotodel(Client *c);
185 static void keypress(XEvent *e);
186 static void killclient(const Arg *arg);
187 static void manage(Window w, XWindowAttributes *wa);
188 static void mappingnotify(XEvent *e);
189 static void maprequest(XEvent *e);
190 static void monocle(Monitor *m);
191 static void movemouse(const Arg *arg);
192 static Client *nexttiled(Monitor *m, Client *c);
193 static void propertynotify(XEvent *e);
194 static void quit(const Arg *arg);
195 static void resize(Client *c, int x, int y, int w, int h);
196 static void resizemouse(const Arg *arg);
197 static void restack(Monitor *m);
198 static void run(void);
199 static void scan(void);
200 static void setclientstate(Client *c, long state);
201 static void setlayout(const Arg *arg);
202 static void setmfact(const Arg *arg);
203 static void setup(void);
204 static void showhide(Client *c);
205 static void sigchld(int signal);
206 static void spawn(const Arg *arg);
207 static void tag(const Arg *arg);
208 static int textnw(const char *text, unsigned int len);
209 static void tile(Monitor *);
210 static void togglebar(const Arg *arg);
211 static void togglefloating(const Arg *arg);
212 static void toggletag(const Arg *arg);
213 static void toggleview(const Arg *arg);
214 static void unmanage(Client *c);
215 static void unmapnotify(XEvent *e);
216 static void updategeom(void);
217 static void updatebarpos(Monitor *m);
218 static void updatebars(void);
219 static void updatenumlockmask(void);
220 static void updatesizehints(Client *c);
221 static void updatestatus(void);
222 static void updatetitle(Client *c);
223 static void updatewmhints(Client *c);
224 static void view(const Arg *arg);
225 static int xerror(Display *dpy, XErrorEvent *ee);
226 static int xerrordummy(Display *dpy, XErrorEvent *ee);
227 static int xerrorstart(Display *dpy, XErrorEvent *ee);
228 static void zoom(const Arg *arg);
229 #ifdef XINERAMA
230 static void focusmon(const Arg *arg);
231 static void tagmon(const Arg *arg);
232 #endif /* XINERAMA */
233
234 /* variables */
235 static char stext[256];
236 static int screen;
237 static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
238 static int bh, blw = 0; /* bar geometry */
239 static int (*xerrorxlib)(Display *, XErrorEvent *);
240 static unsigned int numlockmask = 0;
241 static void (*handler[LASTEvent]) (XEvent *) = {
242 [ButtonPress] = buttonpress,
243 [ConfigureRequest] = configurerequest,
244 [ConfigureNotify] = configurenotify,
245 [DestroyNotify] = destroynotify,
246 [EnterNotify] = enternotify,
247 [Expose] = expose,
248 [FocusIn] = focusin,
249 [KeyPress] = keypress,
250 [MappingNotify] = mappingnotify,
251 [MapRequest] = maprequest,
252 [PropertyNotify] = propertynotify,
253 [UnmapNotify] = unmapnotify
254 };
255 static Atom wmatom[WMLast], netatom[NetLast];
256 static Bool otherwm;
257 static Bool running = True;
258 static Cursor cursor[CurLast];
259 static Display *dpy;
260 static DC dc;
261 static Layout *lt[] = { NULL, NULL };
262 static Monitor *mons = NULL, *selmon = NULL;
263 static Window root;
264 /* configuration, allows nested code to access above variables */
265 #include "config.h"
266
267 /* compile-time check if all tags fit into an unsigned int bit array. */
268 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
269
270 /* function implementations */
271 void
272 applyrules(Client *c) {
273 unsigned int i;
274 Rule *r;
275 XClassHint ch = { 0 };
276
277 /* rule matching */
278 c->isfloating = c->tags = 0;
279 if(XGetClassHint(dpy, c->win, &ch)) {
280 for(i = 0; i < LENGTH(rules); i++) {
281 r = &rules[i];
282 if((!r->title || strstr(c->name, r->title))
283 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
284 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
285 c->isfloating = r->isfloating;
286 c->tags |= r->tags;
287 }
288 }
289 if(ch.res_class)
290 XFree(ch.res_class);
291 if(ch.res_name)
292 XFree(ch.res_name);
293 }
294 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
295 }
296
297 Bool
298 applysizehints(Client *c, int *x, int *y, int *w, int *h) {
299 Bool baseismin;
300
301 /* set minimum possible */
302 *w = MAX(1, *w);
303 *h = MAX(1, *h);
304
305 if(*x > sx + sw)
306 *x = sw - WIDTH(c);
307 if(*y > sy + sh)
308 *y = sh - HEIGHT(c);
309 if(*x + *w + 2 * c->bw < sx)
310 *x = sx;
311 if(*y + *h + 2 * c->bw < sy)
312 *y = sy;
313 if(*h < bh)
314 *h = bh;
315 if(*w < bh)
316 *w = bh;
317
318 if(resizehints || c->isfloating) {
319 /* see last two sentences in ICCCM 4.1.2.3 */
320 baseismin = c->basew == c->minw && c->baseh == c->minh;
321
322 if(!baseismin) { /* temporarily remove base dimensions */
323 *w -= c->basew;
324 *h -= c->baseh;
325 }
326
327 /* adjust for aspect limits */
328 if(c->mina > 0 && c->maxa > 0) {
329 if(c->maxa < (float)*w / *h)
330 *w = *h * c->maxa;
331 else if(c->mina < (float)*h / *w)
332 *h = *w * c->mina;
333 }
334
335 if(baseismin) { /* increment calculation requires this */
336 *w -= c->basew;
337 *h -= c->baseh;
338 }
339
340 /* adjust for increment value */
341 if(c->incw)
342 *w -= *w % c->incw;
343 if(c->inch)
344 *h -= *h % c->inch;
345
346 /* restore base dimensions */
347 *w += c->basew;
348 *h += c->baseh;
349
350 *w = MAX(*w, c->minw);
351 *h = MAX(*h, c->minh);
352
353 if(c->maxw)
354 *w = MIN(*w, c->maxw);
355
356 if(c->maxh)
357 *h = MIN(*h, c->maxh);
358 }
359 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
360 }
361
362 void
363 arrange(void) {
364 Monitor *m;
365
366 /* optimise two loops into one, check focus(NULL) */
367 for(m = mons; m; m = m->next)
368 showhide(m->stack);
369 focus(NULL);
370 for(m = mons; m; m = m->next) {
371 if(lt[m->sellt]->arrange)
372 lt[m->sellt]->arrange(m);
373 restack(m);
374 }
375 }
376
377 void
378 attach(Client *c) {
379 c->next = selmon->clients;
380 selmon->clients = c;
381 }
382
383 void
384 attachstack(Client *c) {
385 c->snext = selmon->stack;
386 selmon->stack = c;
387 }
388
389 void
390 buttonpress(XEvent *e) {
391 unsigned int i, x, click;
392 Arg arg = {0};
393 Client *c;
394 XButtonPressedEvent *ev = &e->xbutton;
395
396 click = ClkRootWin;
397 if(ev->window == selmon->barwin && ev->x >= selmon->btx) {
398 i = 0;
399 x = selmon->btx;
400 do
401 x += TEXTW(tags[i]);
402 while(ev->x >= x && ++i < LENGTH(tags));
403 if(i < LENGTH(tags)) {
404 click = ClkTagBar;
405 arg.ui = 1 << i;
406 }
407 else if(ev->x < x + blw)
408 click = ClkLtSymbol;
409 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
410 click = ClkStatusText;
411 else
412 click = ClkWinTitle;
413 }
414 else if((c = getclient(ev->window))) {
415 focus(c);
416 click = ClkClientWin;
417 }
418
419 for(i = 0; i < LENGTH(buttons); i++)
420 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
421 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
422 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
423 }
424
425 void
426 checkotherwm(void) {
427 otherwm = False;
428 xerrorxlib = XSetErrorHandler(xerrorstart);
429
430 /* this causes an error if some other window manager is running */
431 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
432 XSync(dpy, False);
433 if(otherwm)
434 die("dwm: another window manager is already running\n");
435 XSetErrorHandler(xerror);
436 XSync(dpy, False);
437 }
438
439 void
440 cleanup(void) {
441 Arg a = {.ui = ~0};
442 Layout foo = { "", NULL };
443 Monitor *m;
444
445 view(&a);
446 lt[selmon->sellt] = &foo;
447
448 /* TODO: consider simplifying cleanup code of the stack, perhaps do that in cleanmons() ? */
449 for(m = mons; m; m = m->next)
450 while(m->stack)
451 unmanage(m->stack);
452 if(dc.font.set)
453 XFreeFontSet(dpy, dc.font.set);
454 else
455 XFreeFont(dpy, dc.font.xfont);
456 XUngrabKey(dpy, AnyKey, AnyModifier, root);
457 XFreePixmap(dpy, dc.drawable);
458 XFreeGC(dpy, dc.gc);
459 XFreeCursor(dpy, cursor[CurNormal]);
460 XFreeCursor(dpy, cursor[CurResize]);
461 XFreeCursor(dpy, cursor[CurMove]);
462 cleanupmons();
463 XSync(dpy, False);
464 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
465 }
466
467 void
468 cleanupmons(void) {
469 Monitor *m;
470
471 while(mons) {
472 m = mons->next;
473 XUnmapWindow(dpy, mons->barwin);
474 XDestroyWindow(dpy, mons->barwin);
475 free(mons);
476 mons = m;
477 }
478 }
479
480 void
481 clearurgent(Client *c) {
482 XWMHints *wmh;
483
484 c->isurgent = False;
485 if(!(wmh = XGetWMHints(dpy, c->win)))
486 return;
487 wmh->flags &= ~XUrgencyHint;
488 XSetWMHints(dpy, c->win, wmh);
489 XFree(wmh);
490 }
491
492 void
493 configure(Client *c) {
494 XConfigureEvent ce;
495
496 ce.type = ConfigureNotify;
497 ce.display = dpy;
498 ce.event = c->win;
499 ce.window = c->win;
500 ce.x = c->x;
501 ce.y = c->y;
502 ce.width = c->w;
503 ce.height = c->h;
504 ce.border_width = c->bw;
505 ce.above = None;
506 ce.override_redirect = False;
507 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
508 }
509
510 void
511 configurenotify(XEvent *e) {
512 Monitor *m;
513 XConfigureEvent *ev = &e->xconfigure;
514
515 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
516 sw = ev->width;
517 sh = ev->height;
518 updategeom();
519 if(dc.drawable != 0)
520 XFreePixmap(dpy, dc.drawable);
521 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
522 updatebars();
523 for(m = mons; m; m = m->next)
524 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
525 arrange();
526 }
527 }
528
529 void
530 configurerequest(XEvent *e) {
531 Client *c;
532 XConfigureRequestEvent *ev = &e->xconfigurerequest;
533 XWindowChanges wc;
534
535 if((c = getclient(ev->window))) {
536 if(ev->value_mask & CWBorderWidth)
537 c->bw = ev->border_width;
538 else if(c->isfloating || !lt[selmon->sellt]->arrange) {
539 if(ev->value_mask & CWX)
540 c->x = sx + ev->x;
541 if(ev->value_mask & CWY)
542 c->y = sy + ev->y;
543 if(ev->value_mask & CWWidth)
544 c->w = ev->width;
545 if(ev->value_mask & CWHeight)
546 c->h = ev->height;
547 if((c->x - sx + c->w) > sw && c->isfloating)
548 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
549 if((c->y - sy + c->h) > sh && c->isfloating)
550 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
551 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
552 configure(c);
553 if(ISVISIBLE((c->mon), c))
554 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
555 }
556 else
557 configure(c);
558 }
559 else {
560 wc.x = ev->x;
561 wc.y = ev->y;
562 wc.width = ev->width;
563 wc.height = ev->height;
564 wc.border_width = ev->border_width;
565 wc.sibling = ev->above;
566 wc.stack_mode = ev->detail;
567 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
568 }
569 XSync(dpy, False);
570 }
571
572 void
573 destroynotify(XEvent *e) {
574 Client *c;
575 XDestroyWindowEvent *ev = &e->xdestroywindow;
576
577 if((c = getclient(ev->window)))
578 unmanage(c);
579 }
580
581 void
582 detach(Client *c) {
583 Client **tc;
584
585 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
586 *tc = c->next;
587 }
588
589 void
590 detachstack(Client *c) {
591 Client **tc;
592
593 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
594 *tc = c->snext;
595 }
596
597 void
598 die(const char *errstr, ...) {
599 va_list ap;
600
601 va_start(ap, errstr);
602 vfprintf(stderr, errstr, ap);
603 va_end(ap);
604 exit(EXIT_FAILURE);
605 }
606
607 void
608 drawbar(Monitor *m) {
609 int x;
610 unsigned int i, occ = 0, urg = 0;
611 unsigned long *col;
612 Client *c;
613
614 for(c = m->clients; c; c = c->next) {
615 occ |= c->tags;
616 if(c->isurgent)
617 urg |= c->tags;
618 }
619
620 dc.x = 0;
621 #ifdef XINERAMA
622 {
623 char buf[2];
624 buf[0] = m->screen_number + '0';
625 buf[1] = '\0';
626 dc.w = TEXTW(buf);
627 drawtext(buf, selmon == m ? dc.sel : dc.norm, True);
628 dc.x += dc.w;
629 }
630 #endif /* XINERAMA */
631 m->btx = dc.x;
632 for(i = 0; i < LENGTH(tags); i++) {
633 dc.w = TEXTW(tags[i]);
634 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
635 drawtext(tags[i], col, urg & 1 << i);
636 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
637 occ & 1 << i, urg & 1 << i, col);
638 dc.x += dc.w;
639 }
640 if(blw > 0) {
641 dc.w = blw;
642 drawtext(lt[m->sellt]->symbol, dc.norm, False);
643 x = dc.x + dc.w;
644 }
645 else
646 x = dc.x;
647 if(m == selmon) {
648 dc.w = TEXTW(stext);
649 dc.x = m->ww - dc.w;
650 if(dc.x < x) {
651 dc.x = x;
652 dc.w = m->ww - x;
653 }
654 drawtext(stext, dc.norm, False);
655 if((dc.w = dc.x - x) > bh) {
656 dc.x = x;
657 if(selmon->sel) {
658 drawtext(selmon->sel->name, dc.sel, False);
659 drawsquare(selmon->sel->isfixed, selmon->sel->isfloating, False, dc.sel);
660 }
661 else
662 drawtext(NULL, dc.norm, False);
663 }
664 }
665 else {
666 dc.x = x;
667 dc.w = m->ww - x;
668 drawtext(NULL, dc.norm, False);
669 }
670 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
671 XSync(dpy, False);
672 }
673
674 void
675 drawbars() {
676 Monitor *m;
677
678 for(m = mons; m; m = m->next)
679 drawbar(m);
680 }
681
682 void
683 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
684 int x;
685 XGCValues gcv;
686 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
687
688 gcv.foreground = col[invert ? ColBG : ColFG];
689 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
690 x = (dc.font.ascent + dc.font.descent + 2) / 4;
691 r.x = dc.x + 1;
692 r.y = dc.y + 1;
693 if(filled) {
694 r.width = r.height = x + 1;
695 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
696 }
697 else if(empty) {
698 r.width = r.height = x;
699 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
700 }
701 }
702
703 void
704 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
705 char buf[256];
706 int i, x, y, h, len, olen;
707 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
708
709 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
710 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
711 if(!text)
712 return;
713 olen = strlen(text);
714 h = dc.font.ascent + dc.font.descent;
715 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
716 x = dc.x + (h / 2);
717 /* shorten text if necessary */
718 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
719 if(!len)
720 return;
721 memcpy(buf, text, len);
722 if(len < olen)
723 for(i = len; i && i > len - 3; buf[--i] = '.');
724 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
725 if(dc.font.set)
726 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
727 else
728 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
729 }
730
731 void
732 enternotify(XEvent *e) {
733 Client *c;
734 XCrossingEvent *ev = &e->xcrossing;
735
736 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
737 return;
738 if((c = getclient(ev->window)))
739 focus(c);
740 else
741 focus(NULL);
742 }
743
744 void
745 expose(XEvent *e) {
746 Monitor *m;
747 XExposeEvent *ev = &e->xexpose;
748
749 if(ev->count == 0)
750 for(m = mons; m; m = m->next)
751 if(ev->window == m->barwin) {
752 drawbar(m);
753 break;
754 }
755 }
756
757 void
758 focus(Client *c) {
759 if(!c || !ISVISIBLE((c->mon), c))
760 for(c = selmon->stack; c && !ISVISIBLE(selmon, c); c = c->snext);
761 if(selmon->sel && selmon->sel != c) {
762 grabbuttons(selmon->sel, False);
763 XSetWindowBorder(dpy, selmon->sel->win, dc.norm[ColBorder]);
764 }
765 if(c) {
766 if(c->isurgent)
767 clearurgent(c);
768 detachstack(c);
769 attachstack(c);
770 grabbuttons(c, True);
771 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
772 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
773 }
774 else
775 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
776 selmon->sel = c;
777 drawbars();
778 }
779
780 void
781 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
782 XFocusChangeEvent *ev = &e->xfocus;
783
784 if(selmon->sel && ev->window != selmon->sel->win)
785 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
786 }
787
788 #ifdef XINERAMA
789 void
790 focusmon(const Arg *arg) {
791 unsigned int i;
792 Monitor *m;
793
794 for(i = 0, m = mons; m; m = m->next, i++)
795 if(i == arg->ui) {
796 selmon = m;
797 focus(NULL);
798 drawbars();
799 break;
800 }
801 }
802 #endif /* XINERAMA */
803
804 void
805 focusstack(const Arg *arg) {
806 Client *c = NULL, *i;
807
808 if(!selmon->sel)
809 return;
810 if(arg->i > 0) {
811 for(c = selmon->sel->next; c && !ISVISIBLE(selmon, c); c = c->next);
812 if(!c)
813 for(c = selmon->clients; c && !ISVISIBLE(selmon, c); c = c->next);
814 }
815 else {
816 for(i = selmon->clients; i != selmon->sel; i = i->next)
817 if(ISVISIBLE(selmon, i))
818 c = i;
819 if(!c)
820 for(; i; i = i->next)
821 if(ISVISIBLE(selmon, i))
822 c = i;
823 }
824 if(c) {
825 focus(c);
826 restack(selmon);
827 }
828 }
829
830 Client *
831 getclient(Window w) {
832 Client *c = NULL;
833 Monitor *m;
834
835 for(m = mons; m; m = m->next)
836 for(c = m->clients; c && c->win != w; c = c->next);
837 return c;
838 }
839
840 unsigned long
841 getcolor(const char *colstr) {
842 Colormap cmap = DefaultColormap(dpy, screen);
843 XColor color;
844
845 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
846 die("error, cannot allocate color '%s'\n", colstr);
847 return color.pixel;
848 }
849
850 long
851 getstate(Window w) {
852 int format, status;
853 long result = -1;
854 unsigned char *p = NULL;
855 unsigned long n, extra;
856 Atom real;
857
858 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
859 &real, &format, &n, &extra, (unsigned char **)&p);
860 if(status != Success)
861 return -1;
862 if(n != 0)
863 result = *p;
864 XFree(p);
865 return result;
866 }
867
868 Bool
869 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
870 char **list = NULL;
871 int n;
872 XTextProperty name;
873
874 if(!text || size == 0)
875 return False;
876 text[0] = '\0';
877 XGetTextProperty(dpy, w, &name, atom);
878 if(!name.nitems)
879 return False;
880 if(name.encoding == XA_STRING)
881 strncpy(text, (char *)name.value, size - 1);
882 else {
883 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
884 && n > 0 && *list) {
885 strncpy(text, *list, size - 1);
886 XFreeStringList(list);
887 }
888 }
889 text[size - 1] = '\0';
890 XFree(name.value);
891 return True;
892 }
893
894 void
895 grabbuttons(Client *c, Bool focused) {
896 updatenumlockmask();
897 {
898 unsigned int i, j;
899 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
900 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
901 if(focused) {
902 for(i = 0; i < LENGTH(buttons); i++)
903 if(buttons[i].click == ClkClientWin)
904 for(j = 0; j < LENGTH(modifiers); j++)
905 XGrabButton(dpy, buttons[i].button,
906 buttons[i].mask | modifiers[j],
907 c->win, False, BUTTONMASK,
908 GrabModeAsync, GrabModeSync, None, None);
909 } else
910 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
911 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
912 }
913 }
914
915 void
916 grabkeys(void) {
917 updatenumlockmask();
918 { /* grab keys */
919 unsigned int i, j;
920 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
921 KeyCode code;
922
923 XUngrabKey(dpy, AnyKey, AnyModifier, root);
924 for(i = 0; i < LENGTH(keys); i++) {
925 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
926 for(j = 0; j < LENGTH(modifiers); j++)
927 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
928 True, GrabModeAsync, GrabModeAsync);
929 }
930 }
931 }
932
933 void
934 initfont(const char *fontstr) {
935 char *def, **missing;
936 int i, n;
937
938 missing = NULL;
939 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
940 if(missing) {
941 while(n--)
942 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
943 XFreeStringList(missing);
944 }
945 if(dc.font.set) {
946 XFontSetExtents *font_extents;
947 XFontStruct **xfonts;
948 char **font_names;
949 dc.font.ascent = dc.font.descent = 0;
950 font_extents = XExtentsOfFontSet(dc.font.set);
951 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
952 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
953 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
954 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
955 xfonts++;
956 }
957 }
958 else {
959 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
960 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
961 die("error, cannot load font: '%s'\n", fontstr);
962 dc.font.ascent = dc.font.xfont->ascent;
963 dc.font.descent = dc.font.xfont->descent;
964 }
965 dc.font.height = dc.font.ascent + dc.font.descent;
966 }
967
968 Bool
969 isprotodel(Client *c) {
970 int i, n;
971 Atom *protocols;
972 Bool ret = False;
973
974 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
975 for(i = 0; !ret && i < n; i++)
976 if(protocols[i] == wmatom[WMDelete])
977 ret = True;
978 XFree(protocols);
979 }
980 return ret;
981 }
982
983 void
984 keypress(XEvent *e) {
985 unsigned int i;
986 KeySym keysym;
987 XKeyEvent *ev;
988
989 ev = &e->xkey;
990 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
991 for(i = 0; i < LENGTH(keys); i++)
992 if(keysym == keys[i].keysym
993 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
994 && keys[i].func)
995 keys[i].func(&(keys[i].arg));
996 }
997
998 void
999 killclient(const Arg *arg) {
1000 XEvent ev;
1001
1002 if(!selmon->sel)
1003 return;
1004 if(isprotodel(selmon->sel)) {
1005 ev.type = ClientMessage;
1006 ev.xclient.window = selmon->sel->win;
1007 ev.xclient.message_type = wmatom[WMProtocols];
1008 ev.xclient.format = 32;
1009 ev.xclient.data.l[0] = wmatom[WMDelete];
1010 ev.xclient.data.l[1] = CurrentTime;
1011 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1012 }
1013 else
1014 XKillClient(dpy, selmon->sel->win);
1015 }
1016
1017 void
1018 manage(Window w, XWindowAttributes *wa) {
1019 static Client cz;
1020 Client *c, *t = NULL;
1021 Window trans = None;
1022 XWindowChanges wc;
1023
1024 if(!(c = malloc(sizeof(Client))))
1025 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1026 *c = cz;
1027 c->win = w;
1028 c->mon = selmon;
1029
1030 /* geometry */
1031 c->x = wa->x;
1032 c->y = wa->y;
1033 c->w = wa->width;
1034 c->h = wa->height;
1035 c->oldbw = wa->border_width;
1036 if(c->w == sw && c->h == sh) {
1037 c->x = sx;
1038 c->y = sy;
1039 c->bw = 0;
1040 }
1041 else {
1042 if(c->x + WIDTH(c) > sx + sw)
1043 c->x = sx + sw - WIDTH(c);
1044 if(c->y + HEIGHT(c) > sy + sh)
1045 c->y = sy + sh - HEIGHT(c);
1046 c->x = MAX(c->x, sx);
1047 /* only fix client y-offset, if the client center might cover the bar */
1048 c->y = MAX(c->y, ((selmon->by == 0) && (c->x + (c->w / 2) >= selmon->wx)
1049 && (c->x + (c->w / 2) < selmon->wx + selmon->ww)) ? bh : sy);
1050 c->bw = borderpx;
1051 }
1052
1053 wc.border_width = c->bw;
1054 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1055 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1056 configure(c); /* propagates border_width, if size doesn't change */
1057 updatesizehints(c);
1058 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1059 grabbuttons(c, False);
1060 updatetitle(c);
1061 if(XGetTransientForHint(dpy, w, &trans))
1062 t = getclient(trans);
1063 if(t)
1064 c->tags = t->tags;
1065 else
1066 applyrules(c);
1067 if(!c->isfloating)
1068 c->isfloating = trans != None || c->isfixed;
1069 if(c->isfloating)
1070 XRaiseWindow(dpy, c->win);
1071 attach(c);
1072 attachstack(c);
1073 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1074 XMapWindow(dpy, c->win);
1075 setclientstate(c, NormalState);
1076 arrange();
1077 }
1078
1079 void
1080 mappingnotify(XEvent *e) {
1081 XMappingEvent *ev = &e->xmapping;
1082
1083 XRefreshKeyboardMapping(ev);
1084 if(ev->request == MappingKeyboard)
1085 grabkeys();
1086 }
1087
1088 void
1089 maprequest(XEvent *e) {
1090 static XWindowAttributes wa;
1091 XMapRequestEvent *ev = &e->xmaprequest;
1092
1093 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1094 return;
1095 if(wa.override_redirect)
1096 return;
1097 if(!getclient(ev->window))
1098 manage(ev->window, &wa);
1099 }
1100
1101 void
1102 monocle(Monitor *m) {
1103 Client *c;
1104
1105 for(c = nexttiled(m, selmon->clients); c; c = nexttiled(m, c->next))
1106 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw);
1107 }
1108
1109 void
1110 movemouse(const Arg *arg) {
1111 int x, y, ocx, ocy, di, nx, ny;
1112 unsigned int dui;
1113 Client *c;
1114 Window dummy;
1115 XEvent ev;
1116
1117 if(!(c = selmon->sel))
1118 return;
1119 restack(selmon);
1120 ocx = c->x;
1121 ocy = c->y;
1122 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1123 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1124 return;
1125 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
1126 do {
1127 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1128 switch (ev.type) {
1129 case ConfigureRequest:
1130 case Expose:
1131 case MapRequest:
1132 handler[ev.type](&ev);
1133 break;
1134 case MotionNotify:
1135 nx = ocx + (ev.xmotion.x - x);
1136 ny = ocy + (ev.xmotion.y - y);
1137 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1138 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1139 if(abs(selmon->wx - nx) < snap)
1140 nx = selmon->wx;
1141 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1142 nx = selmon->wx + selmon->ww - WIDTH(c);
1143 if(abs(selmon->wy - ny) < snap)
1144 ny = selmon->wy;
1145 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1146 ny = selmon->wy + selmon->wh - HEIGHT(c);
1147 if(!c->isfloating && lt[selmon->sellt]->arrange
1148 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1149 togglefloating(NULL);
1150 }
1151 if(!lt[selmon->sellt]->arrange || c->isfloating)
1152 resize(c, nx, ny, c->w, c->h);
1153 break;
1154 }
1155 }
1156 while(ev.type != ButtonRelease);
1157 XUngrabPointer(dpy, CurrentTime);
1158 }
1159
1160 Client *
1161 nexttiled(Monitor *m, Client *c) {
1162 // TODO: m handling
1163 for(; c && (c->isfloating || !ISVISIBLE(m, c)); c = c->next);
1164 return c;
1165 }
1166
1167 void
1168 propertynotify(XEvent *e) {
1169 Client *c;
1170 Window trans;
1171 XPropertyEvent *ev = &e->xproperty;
1172
1173 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1174 updatestatus();
1175 else if(ev->state == PropertyDelete)
1176 return; /* ignore */
1177 else if((c = getclient(ev->window))) {
1178 switch (ev->atom) {
1179 default: break;
1180 case XA_WM_TRANSIENT_FOR:
1181 XGetTransientForHint(dpy, c->win, &trans);
1182 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1183 arrange();
1184 break;
1185 case XA_WM_NORMAL_HINTS:
1186 updatesizehints(c);
1187 break;
1188 case XA_WM_HINTS:
1189 updatewmhints(c);
1190 drawbars();
1191 break;
1192 }
1193 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1194 updatetitle(c);
1195 if(c == selmon->sel)
1196 drawbars();
1197 }
1198 }
1199 }
1200
1201 void
1202 quit(const Arg *arg) {
1203 running = False;
1204 }
1205
1206 void
1207 resize(Client *c, int x, int y, int w, int h) {
1208 XWindowChanges wc;
1209
1210 if(applysizehints(c, &x, &y, &w, &h)) {
1211 c->x = wc.x = x;
1212 c->y = wc.y = y;
1213 c->w = wc.width = w;
1214 c->h = wc.height = h;
1215 wc.border_width = c->bw;
1216 XConfigureWindow(dpy, c->win,
1217 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1218 configure(c);
1219 XSync(dpy, False);
1220 }
1221 }
1222
1223 void
1224 resizemouse(const Arg *arg) {
1225 int ocx, ocy;
1226 int nw, nh;
1227 Client *c;
1228 XEvent ev;
1229
1230 if(!(c = selmon->sel))
1231 return;
1232 restack(selmon);
1233 ocx = c->x;
1234 ocy = c->y;
1235 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1236 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1237 return;
1238 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1239 do {
1240 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1241 switch(ev.type) {
1242 case ConfigureRequest:
1243 case Expose:
1244 case MapRequest:
1245 handler[ev.type](&ev);
1246 break;
1247 case MotionNotify:
1248 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1249 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1250
1251 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1252 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1253 if(!c->isfloating && lt[selmon->sellt]->arrange
1254 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1255 togglefloating(NULL);
1256 }
1257 if(!lt[selmon->sellt]->arrange || c->isfloating)
1258 resize(c, c->x, c->y, nw, nh);
1259 break;
1260 }
1261 }
1262 while(ev.type != ButtonRelease);
1263 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1264 XUngrabPointer(dpy, CurrentTime);
1265 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1266 }
1267
1268 void
1269 restack(Monitor *m) {
1270 Client *c;
1271 XEvent ev;
1272 XWindowChanges wc;
1273
1274 drawbars();
1275 if(!selmon->sel)
1276 return;
1277 if(m == selmon && (selmon->sel->isfloating || !lt[m->sellt]->arrange))
1278 XRaiseWindow(dpy, selmon->sel->win);
1279 if(lt[m->sellt]->arrange) {
1280 wc.stack_mode = Below;
1281 wc.sibling = m->barwin;
1282 for(c = m->stack; c; c = c->snext)
1283 if(!c->isfloating && ISVISIBLE(m, c)) {
1284 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1285 wc.sibling = c->win;
1286 }
1287 }
1288 XSync(dpy, False);
1289 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1290 }
1291
1292 void
1293 run(void) {
1294 XEvent ev;
1295
1296 /* main event loop */
1297 XSync(dpy, False);
1298 while(running && !XNextEvent(dpy, &ev)) {
1299 if(handler[ev.type])
1300 (handler[ev.type])(&ev); /* call handler */
1301 }
1302 }
1303
1304 void
1305 scan(void) {
1306 unsigned int i, num;
1307 Window d1, d2, *wins = NULL;
1308 XWindowAttributes wa;
1309
1310 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1311 for(i = 0; i < num; i++) {
1312 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1313 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1314 continue;
1315 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1316 manage(wins[i], &wa);
1317 }
1318 for(i = 0; i < num; i++) { /* now the transients */
1319 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1320 continue;
1321 if(XGetTransientForHint(dpy, wins[i], &d1)
1322 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1323 manage(wins[i], &wa);
1324 }
1325 if(wins)
1326 XFree(wins);
1327 }
1328 }
1329
1330 void
1331 setclientstate(Client *c, long state) {
1332 long data[] = {state, None};
1333
1334 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1335 PropModeReplace, (unsigned char *)data, 2);
1336 }
1337
1338 void
1339 setlayout(const Arg *arg) {
1340 if(!arg || !arg->v || arg->v != lt[selmon->sellt])
1341 selmon->sellt ^= 1;
1342 if(arg && arg->v)
1343 lt[selmon->sellt] = (Layout *)arg->v;
1344 if(selmon->sel)
1345 arrange();
1346 else
1347 drawbars();
1348 }
1349
1350 /* arg > 1.0 will set mfact absolutly */
1351 void
1352 setmfact(const Arg *arg) {
1353 float f;
1354
1355 if(!arg || !lt[selmon->sellt]->arrange)
1356 return;
1357 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1358 if(f < 0.1 || f > 0.9)
1359 return;
1360 selmon->mfact = f;
1361 arrange();
1362 }
1363
1364 void
1365 setup(void) {
1366 unsigned int i;
1367 int w;
1368 XSetWindowAttributes wa;
1369
1370 /* init screen */
1371 screen = DefaultScreen(dpy);
1372 root = RootWindow(dpy, screen);
1373 initfont(font);
1374 sx = 0;
1375 sy = 0;
1376 sw = DisplayWidth(dpy, screen);
1377 sh = DisplayHeight(dpy, screen);
1378 bh = dc.h = dc.font.height + 2;
1379 lt[0] = &layouts[0];
1380 lt[1] = &layouts[1 % LENGTH(layouts)];
1381 updategeom();
1382
1383 /* init atoms */
1384 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1385 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1386 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1387 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1388 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1389
1390 /* init cursors */
1391 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1392 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1393 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1394
1395 /* init appearance */
1396 dc.norm[ColBorder] = getcolor(normbordercolor);
1397 dc.norm[ColBG] = getcolor(normbgcolor);
1398 dc.norm[ColFG] = getcolor(normfgcolor);
1399 dc.sel[ColBorder] = getcolor(selbordercolor);
1400 dc.sel[ColBG] = getcolor(selbgcolor);
1401 dc.sel[ColFG] = getcolor(selfgcolor);
1402 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1403 dc.gc = XCreateGC(dpy, root, 0, NULL);
1404 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1405 if(!dc.font.set)
1406 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1407
1408 /* init bars */
1409 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1410 w = TEXTW(layouts[i].symbol);
1411 blw = MAX(blw, w);
1412 }
1413 updatebars();
1414 updatestatus();
1415
1416 /* EWMH support per view */
1417 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1418 PropModeReplace, (unsigned char *) netatom, NetLast);
1419
1420 /* select for events */
1421 wa.cursor = cursor[CurNormal];
1422 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1423 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1424 |PropertyChangeMask;
1425 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1426 XSelectInput(dpy, root, wa.event_mask);
1427
1428 grabkeys();
1429 }
1430
1431 void
1432 showhide(Client *c) {
1433 if(!c)
1434 return;
1435 if(ISVISIBLE((c->mon), c)) { /* show clients top down */
1436 XMoveWindow(dpy, c->win, c->x, c->y);
1437 if(!lt[c->mon->sellt]->arrange || c->isfloating)
1438 resize(c, c->x, c->y, c->w, c->h);
1439 showhide(c->snext);
1440 }
1441 else { /* hide clients bottom up */
1442 showhide(c->snext);
1443 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1444 }
1445 }
1446
1447
1448 void
1449 sigchld(int signal) {
1450 while(0 < waitpid(-1, NULL, WNOHANG));
1451 }
1452
1453 void
1454 spawn(const Arg *arg) {
1455 signal(SIGCHLD, sigchld);
1456 if(fork() == 0) {
1457 if(dpy)
1458 close(ConnectionNumber(dpy));
1459 setsid();
1460 execvp(((char **)arg->v)[0], (char **)arg->v);
1461 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1462 perror(" failed");
1463 exit(0);
1464 }
1465 }
1466
1467 void
1468 tag(const Arg *arg) {
1469 if(selmon->sel && arg->ui & TAGMASK) {
1470 selmon->sel->tags = arg->ui & TAGMASK;
1471 arrange();
1472 }
1473 }
1474
1475 #ifdef XINERAMA
1476 void
1477 tagmon(const Arg *arg) {
1478 unsigned int i;
1479 Monitor *m;
1480
1481 for(i = 0, m = mons; m; m = m->next, i++)
1482 if(i == arg->ui) {
1483 selmon->sel->m = m;
1484 arrange();
1485 break;
1486 }
1487 }
1488 #endif /* XINERAMA */
1489
1490 int
1491 textnw(const char *text, unsigned int len) {
1492 XRectangle r;
1493
1494 if(dc.font.set) {
1495 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1496 return r.width;
1497 }
1498 return XTextWidth(dc.font.xfont, text, len);
1499 }
1500
1501 void
1502 tile(Monitor *m) {
1503 int x, y, h, w, mw;
1504 unsigned int i, n;
1505 Client *c;
1506
1507 for(n = 0, c = nexttiled(m, m->clients); c; c = nexttiled(m, c->next), n++);
1508 if(n == 0)
1509 return;
1510
1511 /* master */
1512 c = nexttiled(m, m->clients);
1513 mw = m->mfact * m->ww;
1514 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw);
1515
1516 if(--n == 0)
1517 return;
1518
1519 /* tile stack */
1520 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1521 y = m->wy;
1522 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1523 h = m->wh / n;
1524 if(h < bh)
1525 h = m->wh;
1526
1527 for(i = 0, c = nexttiled(m, c->next); c; c = nexttiled(m, c->next), i++) {
1528 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1529 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw));
1530 if(h != m->wh)
1531 y = c->y + HEIGHT(c);
1532 }
1533 }
1534
1535 void
1536 togglebar(const Arg *arg) {
1537 selmon->showbar = !selmon->showbar;
1538 updatebarpos(selmon);
1539 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1540 arrange();
1541 }
1542
1543 void
1544 togglefloating(const Arg *arg) {
1545 if(!selmon->sel)
1546 return;
1547 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1548 if(selmon->sel->isfloating)
1549 resize(selmon->sel, selmon->sel->x, selmon->sel->y, selmon->sel->w, selmon->sel->h);
1550 arrange();
1551 }
1552
1553 void
1554 toggletag(const Arg *arg) {
1555 unsigned int mask;
1556
1557 if(!selmon->sel)
1558 return;
1559
1560 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1561 if(mask) {
1562 selmon->sel->tags = mask;
1563 arrange();
1564 }
1565 }
1566
1567 void
1568 toggleview(const Arg *arg) {
1569 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1570
1571 if(mask) {
1572 selmon->tagset[selmon->seltags] = mask;
1573 arrange();
1574 }
1575 }
1576
1577 void
1578 unmanage(Client *c) {
1579 XWindowChanges wc;
1580
1581 wc.border_width = c->oldbw;
1582 /* The server grab construct avoids race conditions. */
1583 XGrabServer(dpy);
1584 XSetErrorHandler(xerrordummy);
1585 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1586 detach(c);
1587 detachstack(c);
1588 if(selmon->sel == c)
1589 focus(NULL);
1590 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1591 setclientstate(c, WithdrawnState);
1592 free(c);
1593 XSync(dpy, False);
1594 XSetErrorHandler(xerror);
1595 XUngrabServer(dpy);
1596 arrange();
1597 }
1598
1599 void
1600 unmapnotify(XEvent *e) {
1601 Client *c;
1602 XUnmapEvent *ev = &e->xunmap;
1603
1604 if((c = getclient(ev->window)))
1605 unmanage(c);
1606 }
1607
1608 void
1609 updatebars(void) {
1610 Monitor *m;
1611 XSetWindowAttributes wa;
1612
1613 wa.override_redirect = True;
1614 wa.background_pixmap = ParentRelative;
1615 wa.event_mask = ButtonPressMask|ExposureMask;
1616
1617 for(m = mons; m; m = m->next) {
1618 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1619
1620 CopyFromParent, DefaultVisual(dpy, screen),
1621 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1622 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1623 XMapRaised(dpy, m->barwin);
1624 }
1625 }
1626
1627 void
1628 updatebarpos(Monitor *m) {
1629 m->wy = m->my;
1630 m->wh = m->mh;
1631 if(m->showbar) {
1632 m->wh -= bh;
1633 m->by = m->topbar ? m->wy : m->wy + m->wh;
1634 m->wy = m->topbar ? m->wy + bh : m->wy;
1635 }
1636 else
1637 m->by = -bh;
1638 }
1639
1640 void
1641 updategeom(void) {
1642 int i, n = 1;
1643 Client *c;
1644 Monitor *newmons = NULL, *m, *tm;
1645
1646 #ifdef XINERAMA
1647 XineramaScreenInfo *info = NULL;
1648
1649 if(XineramaIsActive(dpy))
1650 info = XineramaQueryScreens(dpy, &n);
1651 #endif
1652 /* allocate monitor(s) for the new geometry setup */
1653 for(i = 0; i < n; i++) {
1654 m = (Monitor *)malloc(sizeof(Monitor));
1655 m->next = newmons;
1656 newmons = m;
1657 }
1658
1659 /* initialise monitor(s) */
1660 #ifdef XINERAMA
1661 if(XineramaIsActive(dpy)) {
1662 for(i = 0, m = newmons; m; m = m->next, i++) {
1663 m->screen_number = info[i].screen_number;
1664 m->wx = info[i].x_org;
1665 m->my = m->wy = info[i].y_org;
1666 m->ww = info[i].width;
1667 m->mh = m->wh = info[i].height;
1668 }
1669 XFree(info);
1670 }
1671 else
1672 #endif
1673 /* default monitor setup */
1674 {
1675 m->screen_number = 0;
1676 m->wx = sx;
1677 m->my = m->wy = sy;
1678 m->ww = sw;
1679 m->mh = m->wh = sh;
1680 }
1681
1682 /* bar geometry setup */
1683 for(m = newmons; m; m = m->next) {
1684 /* TODO: consider removing the following values from config.h */
1685 m->clients = NULL;
1686 m->sel = NULL;
1687 m->stack = NULL;
1688 m->seltags = 0;
1689 m->sellt = 0;
1690 m->tagset[0] = m->tagset[1] = 1;
1691 m->mfact = mfact;
1692 m->showbar = showbar;
1693 m->topbar = topbar;
1694 updatebarpos(m);
1695 /* reassign all clients with same screen number */
1696 for(tm = mons; tm; tm = tm->next)
1697 if(tm->screen_number == m->screen_number) {
1698 m->clients = tm->clients;
1699 m->stack = tm->stack;
1700 tm->clients = NULL;
1701 tm->stack = NULL;
1702 for(c = m->clients; c; c = c->next)
1703 c->mon = m;
1704 }
1705 }
1706
1707 /* reassign left over clients of disappeared monitors */
1708 for(tm = mons; tm; tm = tm->next) {
1709 while(tm->clients) {
1710 c = tm->clients->next;
1711 tm->clients->next = newmons->clients;
1712 tm->clients->mon = newmons;
1713 newmons->clients = tm->clients;
1714 tm->clients = c;
1715 }
1716 while(tm->stack) {
1717 c = tm->stack->snext;
1718 tm->stack->snext = newmons->stack;
1719 newmons->stack = tm->stack;
1720 tm->stack = c;
1721 }
1722 }
1723
1724 /* select focused monitor */
1725 if(!selmon) {
1726 selmon = newmons;
1727 int di, x, y;
1728 unsigned int dui;
1729 Window dummy;
1730 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1731 for(m = newmons; m; m = m->next)
1732 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh)) {
1733 selmon = m;
1734 break;
1735 }
1736 }
1737
1738 /* final assignment of new monitors */
1739 cleanupmons();
1740 mons = newmons;
1741 }
1742
1743 void
1744 updatenumlockmask(void) {
1745 unsigned int i, j;
1746 XModifierKeymap *modmap;
1747
1748 numlockmask = 0;
1749 modmap = XGetModifierMapping(dpy);
1750 for(i = 0; i < 8; i++)
1751 for(j = 0; j < modmap->max_keypermod; j++)
1752 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1753 == XKeysymToKeycode(dpy, XK_Num_Lock))
1754 numlockmask = (1 << i);
1755 XFreeModifiermap(modmap);
1756 }
1757
1758 void
1759 updatesizehints(Client *c) {
1760 long msize;
1761 XSizeHints size;
1762
1763 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1764 /* size is uninitialized, ensure that size.flags aren't used */
1765 size.flags = PSize;
1766 if(size.flags & PBaseSize) {
1767 c->basew = size.base_width;
1768 c->baseh = size.base_height;
1769 }
1770 else if(size.flags & PMinSize) {
1771 c->basew = size.min_width;
1772 c->baseh = size.min_height;
1773 }
1774 else
1775 c->basew = c->baseh = 0;
1776 if(size.flags & PResizeInc) {
1777 c->incw = size.width_inc;
1778 c->inch = size.height_inc;
1779 }
1780 else
1781 c->incw = c->inch = 0;
1782 if(size.flags & PMaxSize) {
1783 c->maxw = size.max_width;
1784 c->maxh = size.max_height;
1785 }
1786 else
1787 c->maxw = c->maxh = 0;
1788 if(size.flags & PMinSize) {
1789 c->minw = size.min_width;
1790 c->minh = size.min_height;
1791 }
1792 else if(size.flags & PBaseSize) {
1793 c->minw = size.base_width;
1794 c->minh = size.base_height;
1795 }
1796 else
1797 c->minw = c->minh = 0;
1798 if(size.flags & PAspect) {
1799 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1800 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1801 }
1802 else
1803 c->maxa = c->mina = 0.0;
1804 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1805 && c->maxw == c->minw && c->maxh == c->minh);
1806 }
1807
1808 void
1809 updatetitle(Client *c) {
1810 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1811 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1812 }
1813
1814 void
1815 updatestatus() {
1816 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1817 strcpy(stext, "dwm-"VERSION);
1818 drawbar(selmon);
1819 }
1820
1821 void
1822 updatewmhints(Client *c) {
1823 XWMHints *wmh;
1824
1825 if((wmh = XGetWMHints(dpy, c->win))) {
1826 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1827 wmh->flags &= ~XUrgencyHint;
1828 XSetWMHints(dpy, c->win, wmh);
1829 }
1830 else
1831 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1832
1833 XFree(wmh);
1834 }
1835 }
1836
1837 void
1838 view(const Arg *arg) {
1839 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1840 return;
1841 selmon->seltags ^= 1; /* toggle sel tagset */
1842 if(arg->ui & TAGMASK)
1843 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1844 arrange();
1845 }
1846
1847 /* There's no way to check accesses to destroyed windows, thus those cases are
1848 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1849 * default error handler, which may call exit. */
1850 int
1851 xerror(Display *dpy, XErrorEvent *ee) {
1852 if(ee->error_code == BadWindow
1853 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1854 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1855 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1856 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1857 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1858 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1859 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1860 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1861 return 0;
1862 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1863 ee->request_code, ee->error_code);
1864 return xerrorxlib(dpy, ee); /* may call exit */
1865 }
1866
1867 int
1868 xerrordummy(Display *dpy, XErrorEvent *ee) {
1869 return 0;
1870 }
1871
1872 /* Startup Error handler to check if another window manager
1873 * is already running. */
1874 int
1875 xerrorstart(Display *dpy, XErrorEvent *ee) {
1876 otherwm = True;
1877 return -1;
1878 }
1879
1880 void
1881 zoom(const Arg *arg) {
1882 Client *c = selmon->sel;
1883
1884 if(!lt[selmon->sellt]->arrange || lt[selmon->sellt]->arrange == monocle || (selmon->sel && selmon->sel->isfloating))
1885 return;
1886 if(c == nexttiled(selmon, selmon->clients))
1887 if(!c || !(c = nexttiled(selmon, c->next)))
1888 return;
1889 detach(c);
1890 attach(c);
1891 focus(c);
1892 arrange();
1893 }
1894
1895 int
1896 main(int argc, char *argv[]) {
1897 if(argc == 2 && !strcmp("-v", argv[1]))
1898 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1899 else if(argc != 1)
1900 die("usage: dwm [-v]\n");
1901
1902 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1903 fputs("warning: no locale support\n", stderr);
1904
1905 if(!(dpy = XOpenDisplay(NULL)))
1906 die("dwm: cannot open display\n");
1907
1908 checkotherwm();
1909 setup();
1910 scan();
1911 run();
1912 cleanup();
1913
1914 XCloseDisplay(dpy);
1915 return 0;
1916 }