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[dwm.git] / dwm.c
1 //#define XINULATOR /* debug, simulates dual head */
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(C) ((C->tags & C->mon->tagset[C->mon->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(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 unfocus(Client *c);
215 static void unmanage(Client *c);
216 static void unmapnotify(XEvent *e);
217 static void updategeom(void);
218 static void updatebarpos(Monitor *m);
219 static void updatebars(void);
220 static void updatenumlockmask(void);
221 static void updatesizehints(Client *c);
222 static void updatestatus(void);
223 static void updatetitle(Client *c);
224 static void updatewmhints(Client *c);
225 static void view(const Arg *arg);
226 static int xerror(Display *dpy, XErrorEvent *ee);
227 static int xerrordummy(Display *dpy, XErrorEvent *ee);
228 static int xerrorstart(Display *dpy, XErrorEvent *ee);
229 static void zoom(const Arg *arg);
230 #ifdef XINERAMA
231 static void focusmon(const Arg *arg);
232 static void tagmon(const Arg *arg);
233 #endif /* XINERAMA */
234
235 /* variables */
236 static char stext[256];
237 static int screen;
238 static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
239 static int bh, blw = 0; /* bar geometry */
240 static int (*xerrorxlib)(Display *, XErrorEvent *);
241 static unsigned int numlockmask = 0;
242 static void (*handler[LASTEvent]) (XEvent *) = {
243 [ButtonPress] = buttonpress,
244 [ConfigureRequest] = configurerequest,
245 [ConfigureNotify] = configurenotify,
246 [DestroyNotify] = destroynotify,
247 [EnterNotify] = enternotify,
248 [Expose] = expose,
249 [FocusIn] = focusin,
250 [KeyPress] = keypress,
251 [MappingNotify] = mappingnotify,
252 [MapRequest] = maprequest,
253 [PropertyNotify] = propertynotify,
254 [UnmapNotify] = unmapnotify
255 };
256 static Atom wmatom[WMLast], netatom[NetLast];
257 static Bool otherwm;
258 static Bool running = True;
259 static Cursor cursor[CurLast];
260 static Display *dpy;
261 static DC dc;
262 static Layout *lt[] = { NULL, NULL };
263 static Monitor *mons = NULL, *selmon = NULL;
264 static Window root;
265 /* configuration, allows nested code to access above variables */
266 #include "config.h"
267
268 /* compile-time check if all tags fit into an unsigned int bit array. */
269 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
270
271 /* function implementations */
272 void
273 applyrules(Client *c) {
274 unsigned int i;
275 Rule *r;
276 XClassHint ch = { 0 };
277
278 /* rule matching */
279 c->isfloating = c->tags = 0;
280 if(XGetClassHint(dpy, c->win, &ch)) {
281 for(i = 0; i < LENGTH(rules); i++) {
282 r = &rules[i];
283 if((!r->title || strstr(c->name, r->title))
284 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
285 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
286 c->isfloating = r->isfloating;
287 c->tags |= r->tags;
288 }
289 }
290 if(ch.res_class)
291 XFree(ch.res_class);
292 if(ch.res_name)
293 XFree(ch.res_name);
294 }
295 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
296 }
297
298 Bool
299 applysizehints(Client *c, int *x, int *y, int *w, int *h) {
300 Bool baseismin;
301
302 /* set minimum possible */
303 *w = MAX(1, *w);
304 *h = MAX(1, *h);
305
306 if(*x > sx + sw)
307 *x = sw - WIDTH(c);
308 if(*y > sy + sh)
309 *y = sh - HEIGHT(c);
310 if(*x + *w + 2 * c->bw < sx)
311 *x = sx;
312 if(*y + *h + 2 * c->bw < sy)
313 *y = sy;
314 if(*h < bh)
315 *h = bh;
316 if(*w < bh)
317 *w = bh;
318
319 if(resizehints || c->isfloating) {
320 /* see last two sentences in ICCCM 4.1.2.3 */
321 baseismin = c->basew == c->minw && c->baseh == c->minh;
322
323 if(!baseismin) { /* temporarily remove base dimensions */
324 *w -= c->basew;
325 *h -= c->baseh;
326 }
327
328 /* adjust for aspect limits */
329 if(c->mina > 0 && c->maxa > 0) {
330 if(c->maxa < (float)*w / *h)
331 *w = *h * c->maxa;
332 else if(c->mina < (float)*h / *w)
333 *h = *w * c->mina;
334 }
335
336 if(baseismin) { /* increment calculation requires this */
337 *w -= c->basew;
338 *h -= c->baseh;
339 }
340
341 /* adjust for increment value */
342 if(c->incw)
343 *w -= *w % c->incw;
344 if(c->inch)
345 *h -= *h % c->inch;
346
347 /* restore base dimensions */
348 *w += c->basew;
349 *h += c->baseh;
350
351 *w = MAX(*w, c->minw);
352 *h = MAX(*h, c->minh);
353
354 if(c->maxw)
355 *w = MIN(*w, c->maxw);
356
357 if(c->maxh)
358 *h = MIN(*h, c->maxh);
359 }
360 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
361 }
362
363 void
364 arrange(void) {
365 Monitor *m;
366
367 /* optimise two loops into one, check focus(NULL) */
368 for(m = mons; m; m = m->next)
369 showhide(m->stack);
370 focus(NULL);
371 for(m = mons; m; m = m->next) {
372 if(lt[m->sellt]->arrange)
373 lt[m->sellt]->arrange(m);
374 restack(m);
375 }
376 }
377
378 void
379 attach(Client *c) {
380 c->next = c->mon->clients;
381 c->mon->clients = c;
382 }
383
384 void
385 attachstack(Client *c) {
386 c->snext = c->mon->stack;
387 c->mon->stack = c;
388 }
389
390 void
391 buttonpress(XEvent *e) {
392 unsigned int i, x, click;
393 Arg arg = {0};
394 Client *c;
395 Monitor *m;
396 XButtonPressedEvent *ev = &e->xbutton;
397
398 click = ClkRootWin;
399 /* focus monitor if necessary */
400 for(m = mons; m; m = m->next)
401 if(ev->window == m->barwin) {
402 if(m != selmon) {
403 unfocus(selmon->stack);
404 selmon = m;
405 focus(NULL);
406 }
407 break;
408 }
409 if(ev->window == selmon->barwin && ev->x >= selmon->btx) {
410 i = 0;
411 x = selmon->btx;
412 do
413 x += TEXTW(tags[i]);
414 while(ev->x >= x && ++i < LENGTH(tags));
415 if(i < LENGTH(tags)) {
416 click = ClkTagBar;
417 arg.ui = 1 << i;
418 }
419 else if(ev->x < x + blw)
420 click = ClkLtSymbol;
421 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
422 click = ClkStatusText;
423 else
424 click = ClkWinTitle;
425 }
426 else if((c = getclient(ev->window))) {
427 focus(c);
428 click = ClkClientWin;
429 }
430
431 for(i = 0; i < LENGTH(buttons); i++)
432 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
433 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
434 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
435 }
436
437 void
438 checkotherwm(void) {
439 otherwm = False;
440 xerrorxlib = XSetErrorHandler(xerrorstart);
441
442 /* this causes an error if some other window manager is running */
443 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
444 XSync(dpy, False);
445 if(otherwm)
446 die("dwm: another window manager is already running\n");
447 XSetErrorHandler(xerror);
448 XSync(dpy, False);
449 }
450
451 void
452 cleanup(void) {
453 Arg a = {.ui = ~0};
454 Layout foo = { "", NULL };
455 Monitor *m;
456
457 view(&a);
458 lt[selmon->sellt] = &foo;
459
460 /* TODO: consider simplifying cleanup code of the stack, perhaps do that in cleanmons() ? */
461 for(m = mons; m; m = m->next)
462 while(m->stack)
463 unmanage(m->stack);
464 if(dc.font.set)
465 XFreeFontSet(dpy, dc.font.set);
466 else
467 XFreeFont(dpy, dc.font.xfont);
468 XUngrabKey(dpy, AnyKey, AnyModifier, root);
469 XFreePixmap(dpy, dc.drawable);
470 XFreeGC(dpy, dc.gc);
471 XFreeCursor(dpy, cursor[CurNormal]);
472 XFreeCursor(dpy, cursor[CurResize]);
473 XFreeCursor(dpy, cursor[CurMove]);
474 cleanupmons();
475 XSync(dpy, False);
476 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
477 }
478
479 void
480 cleanupmons(void) {
481 Monitor *m;
482
483 while(mons) {
484 m = mons->next;
485 XUnmapWindow(dpy, mons->barwin);
486 XDestroyWindow(dpy, mons->barwin);
487 free(mons);
488 mons = m;
489 }
490 }
491
492 void
493 clearurgent(Client *c) {
494 XWMHints *wmh;
495
496 c->isurgent = False;
497 if(!(wmh = XGetWMHints(dpy, c->win)))
498 return;
499 wmh->flags &= ~XUrgencyHint;
500 XSetWMHints(dpy, c->win, wmh);
501 XFree(wmh);
502 }
503
504 void
505 configure(Client *c) {
506 XConfigureEvent ce;
507
508 ce.type = ConfigureNotify;
509 ce.display = dpy;
510 ce.event = c->win;
511 ce.window = c->win;
512 ce.x = c->x;
513 ce.y = c->y;
514 ce.width = c->w;
515 ce.height = c->h;
516 ce.border_width = c->bw;
517 ce.above = None;
518 ce.override_redirect = False;
519 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
520 }
521
522 void
523 configurenotify(XEvent *e) {
524 Monitor *m;
525 XConfigureEvent *ev = &e->xconfigure;
526
527 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
528 sw = ev->width;
529 sh = ev->height;
530 updategeom();
531 if(dc.drawable != 0)
532 XFreePixmap(dpy, dc.drawable);
533 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
534 updatebars();
535 for(m = mons; m; m = m->next)
536 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
537 arrange();
538 }
539 }
540
541 void
542 configurerequest(XEvent *e) {
543 Client *c;
544 XConfigureRequestEvent *ev = &e->xconfigurerequest;
545 XWindowChanges wc;
546
547 if((c = getclient(ev->window))) {
548 if(ev->value_mask & CWBorderWidth)
549 c->bw = ev->border_width;
550 else if(c->isfloating || !lt[selmon->sellt]->arrange) {
551 if(ev->value_mask & CWX)
552 c->x = sx + ev->x;
553 if(ev->value_mask & CWY)
554 c->y = sy + ev->y;
555 if(ev->value_mask & CWWidth)
556 c->w = ev->width;
557 if(ev->value_mask & CWHeight)
558 c->h = ev->height;
559 if((c->x - sx + c->w) > sw && c->isfloating)
560 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
561 if((c->y - sy + c->h) > sh && c->isfloating)
562 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
563 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
564 configure(c);
565 if(ISVISIBLE(c))
566 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
567 }
568 else
569 configure(c);
570 }
571 else {
572 wc.x = ev->x;
573 wc.y = ev->y;
574 wc.width = ev->width;
575 wc.height = ev->height;
576 wc.border_width = ev->border_width;
577 wc.sibling = ev->above;
578 wc.stack_mode = ev->detail;
579 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
580 }
581 XSync(dpy, False);
582 }
583
584 void
585 destroynotify(XEvent *e) {
586 Client *c;
587 XDestroyWindowEvent *ev = &e->xdestroywindow;
588
589 if((c = getclient(ev->window)))
590 unmanage(c);
591 }
592
593 void
594 detach(Client *c) {
595 Client **tc;
596
597 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
598 *tc = c->next;
599 }
600
601 void
602 detachstack(Client *c) {
603 Client **tc;
604
605 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
606 *tc = c->snext;
607 }
608
609 void
610 die(const char *errstr, ...) {
611 va_list ap;
612
613 va_start(ap, errstr);
614 vfprintf(stderr, errstr, ap);
615 va_end(ap);
616 exit(EXIT_FAILURE);
617 }
618
619 void
620 drawbar(Monitor *m) {
621 int x;
622 unsigned int i, occ = 0, urg = 0;
623 unsigned long *col;
624 Client *c;
625
626 for(c = m->clients; c; c = c->next) {
627 occ |= c->tags;
628 if(c->isurgent)
629 urg |= c->tags;
630 }
631
632 dc.x = 0;
633 #ifdef XINERAMA
634 {
635 char buf[2];
636 buf[0] = m->screen_number + '0';
637 buf[1] = '\0';
638 dc.w = TEXTW(buf);
639 drawtext(buf, selmon == m ? dc.sel : dc.norm, True);
640 dc.x += dc.w;
641 }
642 #endif /* XINERAMA */
643 m->btx = dc.x;
644 for(i = 0; i < LENGTH(tags); i++) {
645 dc.w = TEXTW(tags[i]);
646 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
647 drawtext(tags[i], col, urg & 1 << i);
648 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
649 occ & 1 << i, urg & 1 << i, col);
650 dc.x += dc.w;
651 }
652 if(blw > 0) {
653 dc.w = blw;
654 drawtext(lt[m->sellt]->symbol, dc.norm, False);
655 x = dc.x + dc.w;
656 }
657 else
658 x = dc.x;
659 if(m == selmon) { /* status is only drawn on selected monitor */
660 dc.w = TEXTW(stext);
661 dc.x = m->ww - dc.w;
662 if(dc.x < x) {
663 dc.x = x;
664 dc.w = m->ww - x;
665 }
666 drawtext(stext, dc.norm, False);
667 }
668 else {
669 dc.x = m->ww;
670 }
671 if((dc.w = dc.x - x) > bh) {
672 dc.x = x;
673 if(m->sel) {
674 col = m == selmon ? dc.sel : dc.norm;
675 drawtext(m->sel->name, col, False);
676 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
677 }
678 else
679 drawtext(NULL, dc.norm, False);
680 }
681 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
682 XSync(dpy, False);
683 }
684
685 void
686 drawbars() {
687 Monitor *m;
688
689 for(m = mons; m; m = m->next)
690 drawbar(m);
691 }
692
693 void
694 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
695 int x;
696 XGCValues gcv;
697 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
698
699 gcv.foreground = col[invert ? ColBG : ColFG];
700 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
701 x = (dc.font.ascent + dc.font.descent + 2) / 4;
702 r.x = dc.x + 1;
703 r.y = dc.y + 1;
704 if(filled) {
705 r.width = r.height = x + 1;
706 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
707 }
708 else if(empty) {
709 r.width = r.height = x;
710 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
711 }
712 }
713
714 void
715 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
716 char buf[256];
717 int i, x, y, h, len, olen;
718 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
719
720 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
721 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
722 if(!text)
723 return;
724 olen = strlen(text);
725 h = dc.font.ascent + dc.font.descent;
726 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
727 x = dc.x + (h / 2);
728 /* shorten text if necessary */
729 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
730 if(!len)
731 return;
732 memcpy(buf, text, len);
733 if(len < olen)
734 for(i = len; i && i > len - 3; buf[--i] = '.');
735 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
736 if(dc.font.set)
737 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
738 else
739 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
740 }
741
742 void
743 enternotify(XEvent *e) {
744 Client *c;
745 XCrossingEvent *ev = &e->xcrossing;
746
747 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
748 return;
749 if((c = getclient(ev->window)))
750 focus(c);
751 else
752 focus(NULL);
753 }
754
755 void
756 expose(XEvent *e) {
757 Monitor *m;
758 XExposeEvent *ev = &e->xexpose;
759
760 if(ev->count == 0)
761 for(m = mons; m; m = m->next)
762 if(ev->window == m->barwin) {
763 drawbar(m);
764 break;
765 }
766 }
767
768 void
769 focus(Client *c) {
770 if(!c || !ISVISIBLE(c))
771 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
772 if(selmon->sel)
773 unfocus(selmon->sel);
774 if(c) {
775 if(c->mon != selmon)
776 selmon = c->mon;
777 if(c->isurgent)
778 clearurgent(c);
779 detachstack(c);
780 attachstack(c);
781 grabbuttons(c, True);
782 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
783 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
784 }
785 else
786 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
787 selmon->sel = c;
788 drawbars();
789 }
790
791 void
792 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
793 XFocusChangeEvent *ev = &e->xfocus;
794
795 if(selmon->sel && ev->window != selmon->sel->win)
796 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
797 }
798
799 #ifdef XINERAMA
800 void
801 focusmon(const Arg *arg) {
802 unsigned int i;
803 Monitor *m;
804
805 for(i = 0, m = mons; m; m = m->next, i++)
806 if(i == arg->ui) {
807 if(m->stack)
808 focus(m->stack);
809 else {
810 unfocus(selmon->stack);
811 selmon = m;
812 focus(NULL);
813 }
814 drawbars();
815 break;
816 }
817 }
818 #endif /* XINERAMA */
819
820 void
821 focusstack(const Arg *arg) {
822 Client *c = NULL, *i;
823
824 if(!selmon->sel)
825 return;
826 if(arg->i > 0) {
827 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
828 if(!c)
829 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
830 }
831 else {
832 for(i = selmon->clients; i != selmon->sel; i = i->next)
833 if(ISVISIBLE(i))
834 c = i;
835 if(!c)
836 for(; i; i = i->next)
837 if(ISVISIBLE(i))
838 c = i;
839 }
840 if(c) {
841 focus(c);
842 restack(selmon);
843 }
844 }
845
846 Client *
847 getclient(Window w) {
848 Client *c;
849 Monitor *m;
850
851 for(m = mons; m; m = m->next)
852 for(c = m->clients; c; c = c->next)
853 if(c->win == w)
854 return c;
855 return NULL;
856 }
857
858 unsigned long
859 getcolor(const char *colstr) {
860 Colormap cmap = DefaultColormap(dpy, screen);
861 XColor color;
862
863 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
864 die("error, cannot allocate color '%s'\n", colstr);
865 return color.pixel;
866 }
867
868 long
869 getstate(Window w) {
870 int format, status;
871 long result = -1;
872 unsigned char *p = NULL;
873 unsigned long n, extra;
874 Atom real;
875
876 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
877 &real, &format, &n, &extra, (unsigned char **)&p);
878 if(status != Success)
879 return -1;
880 if(n != 0)
881 result = *p;
882 XFree(p);
883 return result;
884 }
885
886 Bool
887 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
888 char **list = NULL;
889 int n;
890 XTextProperty name;
891
892 if(!text || size == 0)
893 return False;
894 text[0] = '\0';
895 XGetTextProperty(dpy, w, &name, atom);
896 if(!name.nitems)
897 return False;
898 if(name.encoding == XA_STRING)
899 strncpy(text, (char *)name.value, size - 1);
900 else {
901 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
902 && n > 0 && *list) {
903 strncpy(text, *list, size - 1);
904 XFreeStringList(list);
905 }
906 }
907 text[size - 1] = '\0';
908 XFree(name.value);
909 return True;
910 }
911
912 void
913 grabbuttons(Client *c, Bool focused) {
914 updatenumlockmask();
915 {
916 unsigned int i, j;
917 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
918 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
919 if(focused) {
920 for(i = 0; i < LENGTH(buttons); i++)
921 if(buttons[i].click == ClkClientWin)
922 for(j = 0; j < LENGTH(modifiers); j++)
923 XGrabButton(dpy, buttons[i].button,
924 buttons[i].mask | modifiers[j],
925 c->win, False, BUTTONMASK,
926 GrabModeAsync, GrabModeSync, None, None);
927 } else
928 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
929 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
930 }
931 }
932
933 void
934 grabkeys(void) {
935 updatenumlockmask();
936 { /* grab keys */
937 unsigned int i, j;
938 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
939 KeyCode code;
940
941 XUngrabKey(dpy, AnyKey, AnyModifier, root);
942 for(i = 0; i < LENGTH(keys); i++) {
943 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
944 for(j = 0; j < LENGTH(modifiers); j++)
945 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
946 True, GrabModeAsync, GrabModeAsync);
947 }
948 }
949 }
950
951 void
952 initfont(const char *fontstr) {
953 char *def, **missing;
954 int i, n;
955
956 missing = NULL;
957 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
958 if(missing) {
959 while(n--)
960 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
961 XFreeStringList(missing);
962 }
963 if(dc.font.set) {
964 XFontSetExtents *font_extents;
965 XFontStruct **xfonts;
966 char **font_names;
967 dc.font.ascent = dc.font.descent = 0;
968 font_extents = XExtentsOfFontSet(dc.font.set);
969 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
970 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
971 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
972 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
973 xfonts++;
974 }
975 }
976 else {
977 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
978 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
979 die("error, cannot load font: '%s'\n", fontstr);
980 dc.font.ascent = dc.font.xfont->ascent;
981 dc.font.descent = dc.font.xfont->descent;
982 }
983 dc.font.height = dc.font.ascent + dc.font.descent;
984 }
985
986 Bool
987 isprotodel(Client *c) {
988 int i, n;
989 Atom *protocols;
990 Bool ret = False;
991
992 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
993 for(i = 0; !ret && i < n; i++)
994 if(protocols[i] == wmatom[WMDelete])
995 ret = True;
996 XFree(protocols);
997 }
998 return ret;
999 }
1000
1001 void
1002 keypress(XEvent *e) {
1003 unsigned int i;
1004 KeySym keysym;
1005 XKeyEvent *ev;
1006
1007 ev = &e->xkey;
1008 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1009 for(i = 0; i < LENGTH(keys); i++)
1010 if(keysym == keys[i].keysym
1011 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1012 && keys[i].func)
1013 keys[i].func(&(keys[i].arg));
1014 }
1015
1016 void
1017 killclient(const Arg *arg) {
1018 XEvent ev;
1019
1020 if(!selmon->sel)
1021 return;
1022 if(isprotodel(selmon->sel)) {
1023 ev.type = ClientMessage;
1024 ev.xclient.window = selmon->sel->win;
1025 ev.xclient.message_type = wmatom[WMProtocols];
1026 ev.xclient.format = 32;
1027 ev.xclient.data.l[0] = wmatom[WMDelete];
1028 ev.xclient.data.l[1] = CurrentTime;
1029 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1030 }
1031 else
1032 XKillClient(dpy, selmon->sel->win);
1033 }
1034
1035 void
1036 manage(Window w, XWindowAttributes *wa) {
1037 static Client cz;
1038 Client *c, *t = NULL;
1039 Window trans = None;
1040 XWindowChanges wc;
1041
1042 if(!(c = malloc(sizeof(Client))))
1043 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1044 *c = cz;
1045 c->win = w;
1046 c->mon = selmon;
1047
1048 /* geometry */
1049 c->x = wa->x;
1050 c->y = wa->y;
1051 c->w = wa->width;
1052 c->h = wa->height;
1053 c->oldbw = wa->border_width;
1054 if(c->w == sw && c->h == sh) {
1055 c->x = sx;
1056 c->y = sy;
1057 c->bw = 0;
1058 }
1059 else {
1060 if(c->x + WIDTH(c) > sx + sw)
1061 c->x = sx + sw - WIDTH(c);
1062 if(c->y + HEIGHT(c) > sy + sh)
1063 c->y = sy + sh - HEIGHT(c);
1064 c->x = MAX(c->x, sx);
1065 /* only fix client y-offset, if the client center might cover the bar */
1066 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1067 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : sy);
1068 c->bw = borderpx;
1069 }
1070
1071 wc.border_width = c->bw;
1072 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1073 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1074 configure(c); /* propagates border_width, if size doesn't change */
1075 updatesizehints(c);
1076 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1077 grabbuttons(c, False);
1078 updatetitle(c);
1079 if(XGetTransientForHint(dpy, w, &trans))
1080 t = getclient(trans);
1081 if(t)
1082 c->tags = t->tags;
1083 else
1084 applyrules(c);
1085 if(!c->isfloating)
1086 c->isfloating = trans != None || c->isfixed;
1087 if(c->isfloating)
1088 XRaiseWindow(dpy, c->win);
1089 attach(c);
1090 attachstack(c);
1091 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1092 XMapWindow(dpy, c->win);
1093 setclientstate(c, NormalState);
1094 arrange();
1095 }
1096
1097 void
1098 mappingnotify(XEvent *e) {
1099 XMappingEvent *ev = &e->xmapping;
1100
1101 XRefreshKeyboardMapping(ev);
1102 if(ev->request == MappingKeyboard)
1103 grabkeys();
1104 }
1105
1106 void
1107 maprequest(XEvent *e) {
1108 static XWindowAttributes wa;
1109 XMapRequestEvent *ev = &e->xmaprequest;
1110
1111 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1112 return;
1113 if(wa.override_redirect)
1114 return;
1115 if(!getclient(ev->window))
1116 manage(ev->window, &wa);
1117 }
1118
1119 void
1120 monocle(Monitor *m) {
1121 Client *c;
1122
1123 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1124 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw);
1125 }
1126
1127 void
1128 movemouse(const Arg *arg) {
1129 int x, y, ocx, ocy, di, nx, ny;
1130 unsigned int dui;
1131 Client *c;
1132 Window dummy;
1133 XEvent ev;
1134
1135 if(!(c = selmon->sel))
1136 return;
1137 restack(selmon);
1138 ocx = c->x;
1139 ocy = c->y;
1140 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1141 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1142 return;
1143 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
1144 do {
1145 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1146 switch (ev.type) {
1147 case ConfigureRequest:
1148 case Expose:
1149 case MapRequest:
1150 handler[ev.type](&ev);
1151 break;
1152 case MotionNotify:
1153 nx = ocx + (ev.xmotion.x - x);
1154 ny = ocy + (ev.xmotion.y - y);
1155 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1156 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1157 if(abs(selmon->wx - nx) < snap)
1158 nx = selmon->wx;
1159 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1160 nx = selmon->wx + selmon->ww - WIDTH(c);
1161 if(abs(selmon->wy - ny) < snap)
1162 ny = selmon->wy;
1163 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1164 ny = selmon->wy + selmon->wh - HEIGHT(c);
1165 if(!c->isfloating && lt[selmon->sellt]->arrange
1166 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1167 togglefloating(NULL);
1168 }
1169 if(!lt[selmon->sellt]->arrange || c->isfloating)
1170 resize(c, nx, ny, c->w, c->h);
1171 break;
1172 }
1173 }
1174 while(ev.type != ButtonRelease);
1175 XUngrabPointer(dpy, CurrentTime);
1176 }
1177
1178 Client *
1179 nexttiled(Client *c) {
1180 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1181 return c;
1182 }
1183
1184 void
1185 propertynotify(XEvent *e) {
1186 Client *c;
1187 Window trans;
1188 XPropertyEvent *ev = &e->xproperty;
1189
1190 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1191 updatestatus();
1192 else if(ev->state == PropertyDelete)
1193 return; /* ignore */
1194 else if((c = getclient(ev->window))) {
1195 switch (ev->atom) {
1196 default: break;
1197 case XA_WM_TRANSIENT_FOR:
1198 XGetTransientForHint(dpy, c->win, &trans);
1199 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1200 arrange();
1201 break;
1202 case XA_WM_NORMAL_HINTS:
1203 updatesizehints(c);
1204 break;
1205 case XA_WM_HINTS:
1206 updatewmhints(c);
1207 drawbars();
1208 break;
1209 }
1210 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1211 updatetitle(c);
1212 if(c == selmon->sel)
1213 drawbars();
1214 }
1215 }
1216 }
1217
1218 void
1219 quit(const Arg *arg) {
1220 running = False;
1221 }
1222
1223 void
1224 resize(Client *c, int x, int y, int w, int h) {
1225 XWindowChanges wc;
1226
1227 if(applysizehints(c, &x, &y, &w, &h)) {
1228 c->x = wc.x = x;
1229 c->y = wc.y = y;
1230 c->w = wc.width = w;
1231 c->h = wc.height = h;
1232 wc.border_width = c->bw;
1233 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1234 configure(c);
1235 XSync(dpy, False);
1236 }
1237 }
1238
1239 void
1240 resizemouse(const Arg *arg) {
1241 int ocx, ocy;
1242 int nw, nh;
1243 Client *c;
1244 XEvent ev;
1245
1246 if(!(c = selmon->sel))
1247 return;
1248 restack(selmon);
1249 ocx = c->x;
1250 ocy = c->y;
1251 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1252 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1253 return;
1254 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1255 do {
1256 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1257 switch(ev.type) {
1258 case ConfigureRequest:
1259 case Expose:
1260 case MapRequest:
1261 handler[ev.type](&ev);
1262 break;
1263 case MotionNotify:
1264 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1265 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1266
1267 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1268 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1269 if(!c->isfloating && lt[selmon->sellt]->arrange
1270 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1271 togglefloating(NULL);
1272 }
1273 if(!lt[selmon->sellt]->arrange || c->isfloating)
1274 resize(c, c->x, c->y, nw, nh);
1275 break;
1276 }
1277 }
1278 while(ev.type != ButtonRelease);
1279 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1280 XUngrabPointer(dpy, CurrentTime);
1281 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1282 }
1283
1284 void
1285 restack(Monitor *m) {
1286 Client *c;
1287 XEvent ev;
1288 XWindowChanges wc;
1289
1290 drawbars();
1291 if(!m->sel)
1292 return;
1293 if(m->sel->isfloating || !lt[m->sellt]->arrange)
1294 XRaiseWindow(dpy, m->sel->win);
1295 if(lt[m->sellt]->arrange) {
1296 wc.stack_mode = Below;
1297 wc.sibling = m->barwin;
1298 for(c = m->stack; c; c = c->snext)
1299 if(!c->isfloating && ISVISIBLE(c)) {
1300 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1301 wc.sibling = c->win;
1302 }
1303 }
1304 XSync(dpy, False);
1305 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1306 }
1307
1308 void
1309 run(void) {
1310 XEvent ev;
1311
1312 /* main event loop */
1313 XSync(dpy, False);
1314 while(running && !XNextEvent(dpy, &ev)) {
1315 if(handler[ev.type])
1316 (handler[ev.type])(&ev); /* call handler */
1317 }
1318 }
1319
1320 void
1321 scan(void) {
1322 unsigned int i, num;
1323 Window d1, d2, *wins = NULL;
1324 XWindowAttributes wa;
1325
1326 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1327 for(i = 0; i < num; i++) {
1328 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1329 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1330 continue;
1331 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1332 manage(wins[i], &wa);
1333 }
1334 for(i = 0; i < num; i++) { /* now the transients */
1335 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1336 continue;
1337 if(XGetTransientForHint(dpy, wins[i], &d1)
1338 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1339 manage(wins[i], &wa);
1340 }
1341 if(wins)
1342 XFree(wins);
1343 }
1344 }
1345
1346 void
1347 setclientstate(Client *c, long state) {
1348 long data[] = {state, None};
1349
1350 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1351 PropModeReplace, (unsigned char *)data, 2);
1352 }
1353
1354 void
1355 setlayout(const Arg *arg) {
1356 if(!arg || !arg->v || arg->v != lt[selmon->sellt])
1357 selmon->sellt ^= 1;
1358 if(arg && arg->v)
1359 lt[selmon->sellt] = (Layout *)arg->v;
1360 if(selmon->sel)
1361 arrange();
1362 else
1363 drawbars();
1364 }
1365
1366 /* arg > 1.0 will set mfact absolutly */
1367 void
1368 setmfact(const Arg *arg) {
1369 float f;
1370
1371 if(!arg || !lt[selmon->sellt]->arrange)
1372 return;
1373 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1374 if(f < 0.1 || f > 0.9)
1375 return;
1376 selmon->mfact = f;
1377 arrange();
1378 }
1379
1380 void
1381 setup(void) {
1382 unsigned int i;
1383 int w;
1384 XSetWindowAttributes wa;
1385
1386 /* init screen */
1387 screen = DefaultScreen(dpy);
1388 root = RootWindow(dpy, screen);
1389 initfont(font);
1390 sx = 0;
1391 sy = 0;
1392 sw = DisplayWidth(dpy, screen);
1393 sh = DisplayHeight(dpy, screen);
1394 bh = dc.h = dc.font.height + 2;
1395 lt[0] = &layouts[0];
1396 lt[1] = &layouts[1 % LENGTH(layouts)];
1397 updategeom();
1398
1399 /* init atoms */
1400 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1401 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1402 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1403 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1404 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1405
1406 /* init cursors */
1407 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1408 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1409 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1410
1411 /* init appearance */
1412 dc.norm[ColBorder] = getcolor(normbordercolor);
1413 dc.norm[ColBG] = getcolor(normbgcolor);
1414 dc.norm[ColFG] = getcolor(normfgcolor);
1415 dc.sel[ColBorder] = getcolor(selbordercolor);
1416 dc.sel[ColBG] = getcolor(selbgcolor);
1417 dc.sel[ColFG] = getcolor(selfgcolor);
1418 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1419 dc.gc = XCreateGC(dpy, root, 0, NULL);
1420 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1421 if(!dc.font.set)
1422 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1423
1424 /* init bars */
1425 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1426 w = TEXTW(layouts[i].symbol);
1427 blw = MAX(blw, w);
1428 }
1429 updatebars();
1430 updatestatus();
1431
1432 /* EWMH support per view */
1433 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1434 PropModeReplace, (unsigned char *) netatom, NetLast);
1435
1436 /* select for events */
1437 wa.cursor = cursor[CurNormal];
1438 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1439 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1440 |PropertyChangeMask;
1441 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1442 XSelectInput(dpy, root, wa.event_mask);
1443
1444 grabkeys();
1445 }
1446
1447 void
1448 showhide(Client *c) {
1449 if(!c)
1450 return;
1451 if(ISVISIBLE(c)) { /* show clients top down */
1452 XMoveWindow(dpy, c->win, c->x, c->y);
1453 if(!lt[c->mon->sellt]->arrange || c->isfloating)
1454 resize(c, c->x, c->y, c->w, c->h);
1455 showhide(c->snext);
1456 }
1457 else { /* hide clients bottom up */
1458 showhide(c->snext);
1459 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1460 }
1461 }
1462
1463
1464 void
1465 sigchld(int signal) {
1466 while(0 < waitpid(-1, NULL, WNOHANG));
1467 }
1468
1469 void
1470 spawn(const Arg *arg) {
1471 signal(SIGCHLD, sigchld);
1472 if(fork() == 0) {
1473 if(dpy)
1474 close(ConnectionNumber(dpy));
1475 setsid();
1476 execvp(((char **)arg->v)[0], (char **)arg->v);
1477 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1478 perror(" failed");
1479 exit(0);
1480 }
1481 }
1482
1483 void
1484 tag(const Arg *arg) {
1485 if(selmon->sel && arg->ui & TAGMASK) {
1486 selmon->sel->tags = arg->ui & TAGMASK;
1487 arrange();
1488 }
1489 }
1490
1491 #ifdef XINERAMA
1492 void
1493 tagmon(const Arg *arg) {
1494 unsigned int i;
1495 Client *c;
1496 Monitor *m;
1497
1498 if(!(c = selmon->sel))
1499 return;
1500 for(i = 0, m = mons; m; m = m->next, i++)
1501 if(i == arg->ui) {
1502 detach(c);
1503 detachstack(c);
1504 c->mon = m;
1505 c->tags = m->seltags; /* assign tags of target monitor */
1506 attach(c);
1507 attachstack(c);
1508 m->sel = c;
1509 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
1510 selmon->sel = c;
1511 arrange();
1512 break;
1513 }
1514 }
1515 #endif /* XINERAMA */
1516
1517 int
1518 textnw(const char *text, unsigned int len) {
1519 XRectangle r;
1520
1521 if(dc.font.set) {
1522 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1523 return r.width;
1524 }
1525 return XTextWidth(dc.font.xfont, text, len);
1526 }
1527
1528 void
1529 tile(Monitor *m) {
1530 int x, y, h, w, mw;
1531 unsigned int i, n;
1532 Client *c;
1533
1534 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1535 if(n == 0)
1536 return;
1537
1538 /* master */
1539 c = nexttiled(m->clients);
1540 mw = m->mfact * m->ww;
1541 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw);
1542
1543 if(--n == 0)
1544 return;
1545
1546 /* tile stack */
1547 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1548 y = m->wy;
1549 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1550 h = m->wh / n;
1551 if(h < bh)
1552 h = m->wh;
1553
1554 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1555 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1556 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw));
1557 if(h != m->wh)
1558 y = c->y + HEIGHT(c);
1559 }
1560 }
1561
1562 void
1563 togglebar(const Arg *arg) {
1564 selmon->showbar = !selmon->showbar;
1565 updatebarpos(selmon);
1566 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1567 arrange();
1568 }
1569
1570 void
1571 togglefloating(const Arg *arg) {
1572 if(!selmon->sel)
1573 return;
1574 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1575 if(selmon->sel->isfloating)
1576 resize(selmon->sel, selmon->sel->x, selmon->sel->y, selmon->sel->w, selmon->sel->h);
1577 arrange();
1578 }
1579
1580 void
1581 toggletag(const Arg *arg) {
1582 unsigned int mask;
1583
1584 if(!selmon->sel)
1585 return;
1586
1587 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1588 if(mask) {
1589 selmon->sel->tags = mask;
1590 arrange();
1591 }
1592 }
1593
1594 void
1595 toggleview(const Arg *arg) {
1596 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1597
1598 if(mask) {
1599 selmon->tagset[selmon->seltags] = mask;
1600 arrange();
1601 }
1602 }
1603
1604 void
1605 unfocus(Client *c) {
1606 if(!c)
1607 return;
1608 grabbuttons(c, False);
1609 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1610 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1611 }
1612
1613 void
1614 unmanage(Client *c) {
1615 XWindowChanges wc;
1616
1617 wc.border_width = c->oldbw;
1618 /* The server grab construct avoids race conditions. */
1619 XGrabServer(dpy);
1620 XSetErrorHandler(xerrordummy);
1621 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1622 detach(c);
1623 detachstack(c);
1624 if(c->mon->sel == c) {
1625 /* TODO: consider separate the next code into a function or into detachstack? */
1626 Client *tc;
1627 for(tc = c->mon->stack; tc && !ISVISIBLE(tc); tc = tc->snext);
1628 c->mon->sel = tc;
1629 focus(NULL);
1630 }
1631 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1632 setclientstate(c, WithdrawnState);
1633 free(c);
1634 XSync(dpy, False);
1635 XSetErrorHandler(xerror);
1636 XUngrabServer(dpy);
1637 arrange();
1638 }
1639
1640 void
1641 unmapnotify(XEvent *e) {
1642 Client *c;
1643 XUnmapEvent *ev = &e->xunmap;
1644
1645 if((c = getclient(ev->window)))
1646 unmanage(c);
1647 }
1648
1649 void
1650 updatebars(void) {
1651 Monitor *m;
1652 XSetWindowAttributes wa;
1653
1654 wa.override_redirect = True;
1655 wa.background_pixmap = ParentRelative;
1656 wa.event_mask = ButtonPressMask|ExposureMask;
1657
1658 for(m = mons; m; m = m->next) {
1659 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1660
1661 CopyFromParent, DefaultVisual(dpy, screen),
1662 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1663 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1664 XMapRaised(dpy, m->barwin);
1665 }
1666 }
1667
1668 void
1669 updatebarpos(Monitor *m) {
1670 m->wy = m->my;
1671 m->wh = m->mh;
1672 if(m->showbar) {
1673 m->wh -= bh;
1674 m->by = m->topbar ? m->wy : m->wy + m->wh;
1675 m->wy = m->topbar ? m->wy + bh : m->wy;
1676 }
1677 else
1678 m->by = -bh;
1679 }
1680
1681 void
1682 updategeom(void) {
1683 int i, di, n = 1, x, y;
1684 unsigned int dui;
1685 Client *c;
1686 Monitor *newmons = NULL, *m, *tm;
1687 Window dummy;
1688
1689 #ifdef XINULATOR
1690 n = 2;
1691 #elif defined(XINERAMA)
1692 XineramaScreenInfo *info = NULL;
1693
1694 if(XineramaIsActive(dpy))
1695 info = XineramaQueryScreens(dpy, &n);
1696 #endif
1697 /* allocate monitor(s) for the new geometry setup */
1698 for(i = 0; i < n; i++) {
1699 m = (Monitor *)malloc(sizeof(Monitor));
1700 m->next = newmons;
1701 newmons = m;
1702 }
1703
1704 /* initialise monitor(s) */
1705 #ifdef XINULATOR
1706 if(1) {
1707 m = newmons;
1708 m->screen_number = 0;
1709 m->wx = sx;
1710 m->my = m->wy = sy;
1711 m->ww = sw;
1712 m->mh = m->wh = sh / 2;
1713 m = newmons->next;
1714 m->screen_number = 1;
1715 m->wx = sx;
1716 m->my = m->wy = sy + sh / 2;
1717 m->ww = sw;
1718 m->mh = m->wh = sh / 2;
1719 }
1720 else
1721 #elif defined(XINERAMA)
1722 if(XineramaIsActive(dpy)) {
1723 for(i = 0, m = newmons; m; m = m->next, i++) {
1724 m->screen_number = info[i].screen_number;
1725 m->wx = info[i].x_org;
1726 m->my = m->wy = info[i].y_org;
1727 m->ww = info[i].width;
1728 m->mh = m->wh = info[i].height;
1729 }
1730 XFree(info);
1731 }
1732 else
1733 #endif
1734 /* default monitor setup */
1735 {
1736 m->screen_number = 0;
1737 m->wx = sx;
1738 m->my = m->wy = sy;
1739 m->ww = sw;
1740 m->mh = m->wh = sh;
1741 }
1742
1743 /* bar geometry setup */
1744 for(m = newmons; m; m = m->next) {
1745 /* TODO: consider removing the following values from config.h */
1746 m->clients = NULL;
1747 m->sel = NULL;
1748 m->stack = NULL;
1749 m->seltags = 0;
1750 m->sellt = 0;
1751 m->tagset[0] = m->tagset[1] = 1;
1752 m->mfact = mfact;
1753 m->showbar = showbar;
1754 m->topbar = topbar;
1755 updatebarpos(m);
1756 }
1757
1758 /* reassign left over clients of disappeared monitors */
1759 for(tm = mons; tm; tm = tm->next)
1760 while(tm->clients) {
1761 c = tm->clients;
1762 tm->clients = c->next;
1763 detachstack(c);
1764 c->mon = newmons;
1765 attach(c);
1766 attachstack(c);
1767 }
1768
1769 /* select focused monitor */
1770 selmon = newmons;
1771 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1772 for(m = newmons; m; m = m->next)
1773 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh)) {
1774 selmon = m;
1775 break;
1776 }
1777
1778 /* final assignment of new monitors */
1779 cleanupmons();
1780 mons = newmons;
1781 }
1782
1783 void
1784 updatenumlockmask(void) {
1785 unsigned int i, j;
1786 XModifierKeymap *modmap;
1787
1788 numlockmask = 0;
1789 modmap = XGetModifierMapping(dpy);
1790 for(i = 0; i < 8; i++)
1791 for(j = 0; j < modmap->max_keypermod; j++)
1792 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1793 == XKeysymToKeycode(dpy, XK_Num_Lock))
1794 numlockmask = (1 << i);
1795 XFreeModifiermap(modmap);
1796 }
1797
1798 void
1799 updatesizehints(Client *c) {
1800 long msize;
1801 XSizeHints size;
1802
1803 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1804 /* size is uninitialized, ensure that size.flags aren't used */
1805 size.flags = PSize;
1806 if(size.flags & PBaseSize) {
1807 c->basew = size.base_width;
1808 c->baseh = size.base_height;
1809 }
1810 else if(size.flags & PMinSize) {
1811 c->basew = size.min_width;
1812 c->baseh = size.min_height;
1813 }
1814 else
1815 c->basew = c->baseh = 0;
1816 if(size.flags & PResizeInc) {
1817 c->incw = size.width_inc;
1818 c->inch = size.height_inc;
1819 }
1820 else
1821 c->incw = c->inch = 0;
1822 if(size.flags & PMaxSize) {
1823 c->maxw = size.max_width;
1824 c->maxh = size.max_height;
1825 }
1826 else
1827 c->maxw = c->maxh = 0;
1828 if(size.flags & PMinSize) {
1829 c->minw = size.min_width;
1830 c->minh = size.min_height;
1831 }
1832 else if(size.flags & PBaseSize) {
1833 c->minw = size.base_width;
1834 c->minh = size.base_height;
1835 }
1836 else
1837 c->minw = c->minh = 0;
1838 if(size.flags & PAspect) {
1839 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1840 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1841 }
1842 else
1843 c->maxa = c->mina = 0.0;
1844 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1845 && c->maxw == c->minw && c->maxh == c->minh);
1846 }
1847
1848 void
1849 updatetitle(Client *c) {
1850 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1851 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1852 }
1853
1854 void
1855 updatestatus() {
1856 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1857 strcpy(stext, "dwm-"VERSION);
1858 drawbar(selmon);
1859 }
1860
1861 void
1862 updatewmhints(Client *c) {
1863 XWMHints *wmh;
1864
1865 if((wmh = XGetWMHints(dpy, c->win))) {
1866 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1867 wmh->flags &= ~XUrgencyHint;
1868 XSetWMHints(dpy, c->win, wmh);
1869 }
1870 else
1871 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1872
1873 XFree(wmh);
1874 }
1875 }
1876
1877 void
1878 view(const Arg *arg) {
1879 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1880 return;
1881 selmon->seltags ^= 1; /* toggle sel tagset */
1882 if(arg->ui & TAGMASK)
1883 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1884 arrange();
1885 }
1886
1887 /* There's no way to check accesses to destroyed windows, thus those cases are
1888 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1889 * default error handler, which may call exit. */
1890 int
1891 xerror(Display *dpy, XErrorEvent *ee) {
1892 if(ee->error_code == BadWindow
1893 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1894 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1895 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1896 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1897 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1898 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1899 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1900 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1901 return 0;
1902 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1903 ee->request_code, ee->error_code);
1904 return xerrorxlib(dpy, ee); /* may call exit */
1905 }
1906
1907 int
1908 xerrordummy(Display *dpy, XErrorEvent *ee) {
1909 return 0;
1910 }
1911
1912 /* Startup Error handler to check if another window manager
1913 * is already running. */
1914 int
1915 xerrorstart(Display *dpy, XErrorEvent *ee) {
1916 otherwm = True;
1917 return -1;
1918 }
1919
1920 void
1921 zoom(const Arg *arg) {
1922 Client *c = selmon->sel;
1923
1924 if(!lt[selmon->sellt]->arrange || lt[selmon->sellt]->arrange == monocle || (selmon->sel && selmon->sel->isfloating))
1925 return;
1926 if(c == nexttiled(selmon->clients))
1927 if(!c || !(c = nexttiled(c->next)))
1928 return;
1929 detach(c);
1930 attach(c);
1931 focus(c);
1932 arrange();
1933 }
1934
1935 int
1936 main(int argc, char *argv[]) {
1937 if(argc == 2 && !strcmp("-v", argv[1]))
1938 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1939 else if(argc != 1)
1940 die("usage: dwm [-v]\n");
1941
1942 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1943 fputs("warning: no locale support\n", stderr);
1944
1945 if(!(dpy = XOpenDisplay(NULL)))
1946 die("dwm: cannot open display\n");
1947
1948 checkotherwm();
1949 setup();
1950 scan();
1951 run();
1952 cleanup();
1953
1954 XCloseDisplay(dpy);
1955 return 0;
1956 }