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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 == selmon)
808 return;
809 unfocus(selmon->sel);
810 selmon = m;
811 focus(NULL);
812 drawbars();
813 break;
814 }
815 }
816 #endif /* XINERAMA */
817
818 void
819 focusstack(const Arg *arg) {
820 Client *c = NULL, *i;
821
822 if(!selmon->sel)
823 return;
824 if(arg->i > 0) {
825 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
826 if(!c)
827 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
828 }
829 else {
830 for(i = selmon->clients; i != selmon->sel; i = i->next)
831 if(ISVISIBLE(i))
832 c = i;
833 if(!c)
834 for(; i; i = i->next)
835 if(ISVISIBLE(i))
836 c = i;
837 }
838 if(c) {
839 focus(c);
840 restack(selmon);
841 }
842 }
843
844 Client *
845 getclient(Window w) {
846 Client *c;
847 Monitor *m;
848
849 for(m = mons; m; m = m->next)
850 for(c = m->clients; c; c = c->next)
851 if(c->win == w)
852 return c;
853 return NULL;
854 }
855
856 unsigned long
857 getcolor(const char *colstr) {
858 Colormap cmap = DefaultColormap(dpy, screen);
859 XColor color;
860
861 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
862 die("error, cannot allocate color '%s'\n", colstr);
863 return color.pixel;
864 }
865
866 long
867 getstate(Window w) {
868 int format, status;
869 long result = -1;
870 unsigned char *p = NULL;
871 unsigned long n, extra;
872 Atom real;
873
874 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
875 &real, &format, &n, &extra, (unsigned char **)&p);
876 if(status != Success)
877 return -1;
878 if(n != 0)
879 result = *p;
880 XFree(p);
881 return result;
882 }
883
884 Bool
885 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
886 char **list = NULL;
887 int n;
888 XTextProperty name;
889
890 if(!text || size == 0)
891 return False;
892 text[0] = '\0';
893 XGetTextProperty(dpy, w, &name, atom);
894 if(!name.nitems)
895 return False;
896 if(name.encoding == XA_STRING)
897 strncpy(text, (char *)name.value, size - 1);
898 else {
899 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
900 && n > 0 && *list) {
901 strncpy(text, *list, size - 1);
902 XFreeStringList(list);
903 }
904 }
905 text[size - 1] = '\0';
906 XFree(name.value);
907 return True;
908 }
909
910 void
911 grabbuttons(Client *c, Bool focused) {
912 updatenumlockmask();
913 {
914 unsigned int i, j;
915 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
916 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
917 if(focused) {
918 for(i = 0; i < LENGTH(buttons); i++)
919 if(buttons[i].click == ClkClientWin)
920 for(j = 0; j < LENGTH(modifiers); j++)
921 XGrabButton(dpy, buttons[i].button,
922 buttons[i].mask | modifiers[j],
923 c->win, False, BUTTONMASK,
924 GrabModeAsync, GrabModeSync, None, None);
925 } else
926 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
927 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
928 }
929 }
930
931 void
932 grabkeys(void) {
933 updatenumlockmask();
934 { /* grab keys */
935 unsigned int i, j;
936 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
937 KeyCode code;
938
939 XUngrabKey(dpy, AnyKey, AnyModifier, root);
940 for(i = 0; i < LENGTH(keys); i++) {
941 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
942 for(j = 0; j < LENGTH(modifiers); j++)
943 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
944 True, GrabModeAsync, GrabModeAsync);
945 }
946 }
947 }
948
949 void
950 initfont(const char *fontstr) {
951 char *def, **missing;
952 int i, n;
953
954 missing = NULL;
955 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
956 if(missing) {
957 while(n--)
958 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
959 XFreeStringList(missing);
960 }
961 if(dc.font.set) {
962 XFontSetExtents *font_extents;
963 XFontStruct **xfonts;
964 char **font_names;
965 dc.font.ascent = dc.font.descent = 0;
966 font_extents = XExtentsOfFontSet(dc.font.set);
967 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
968 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
969 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
970 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
971 xfonts++;
972 }
973 }
974 else {
975 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
976 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
977 die("error, cannot load font: '%s'\n", fontstr);
978 dc.font.ascent = dc.font.xfont->ascent;
979 dc.font.descent = dc.font.xfont->descent;
980 }
981 dc.font.height = dc.font.ascent + dc.font.descent;
982 }
983
984 Bool
985 isprotodel(Client *c) {
986 int i, n;
987 Atom *protocols;
988 Bool ret = False;
989
990 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
991 for(i = 0; !ret && i < n; i++)
992 if(protocols[i] == wmatom[WMDelete])
993 ret = True;
994 XFree(protocols);
995 }
996 return ret;
997 }
998
999 void
1000 keypress(XEvent *e) {
1001 unsigned int i;
1002 KeySym keysym;
1003 XKeyEvent *ev;
1004
1005 ev = &e->xkey;
1006 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1007 for(i = 0; i < LENGTH(keys); i++)
1008 if(keysym == keys[i].keysym
1009 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1010 && keys[i].func)
1011 keys[i].func(&(keys[i].arg));
1012 }
1013
1014 void
1015 killclient(const Arg *arg) {
1016 XEvent ev;
1017
1018 if(!selmon->sel)
1019 return;
1020 if(isprotodel(selmon->sel)) {
1021 ev.type = ClientMessage;
1022 ev.xclient.window = selmon->sel->win;
1023 ev.xclient.message_type = wmatom[WMProtocols];
1024 ev.xclient.format = 32;
1025 ev.xclient.data.l[0] = wmatom[WMDelete];
1026 ev.xclient.data.l[1] = CurrentTime;
1027 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1028 }
1029 else
1030 XKillClient(dpy, selmon->sel->win);
1031 }
1032
1033 void
1034 manage(Window w, XWindowAttributes *wa) {
1035 static Client cz;
1036 Client *c, *t = NULL;
1037 Window trans = None;
1038 XWindowChanges wc;
1039
1040 if(!(c = malloc(sizeof(Client))))
1041 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1042 *c = cz;
1043 c->win = w;
1044 c->mon = selmon;
1045
1046 /* geometry */
1047 c->x = wa->x;
1048 c->y = wa->y;
1049 c->w = wa->width;
1050 c->h = wa->height;
1051 c->oldbw = wa->border_width;
1052 if(c->w == sw && c->h == sh) {
1053 c->x = sx;
1054 c->y = sy;
1055 c->bw = 0;
1056 }
1057 else {
1058 if(c->x + WIDTH(c) > sx + sw)
1059 c->x = sx + sw - WIDTH(c);
1060 if(c->y + HEIGHT(c) > sy + sh)
1061 c->y = sy + sh - HEIGHT(c);
1062 c->x = MAX(c->x, sx);
1063 /* only fix client y-offset, if the client center might cover the bar */
1064 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1065 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : sy);
1066 c->bw = borderpx;
1067 }
1068
1069 wc.border_width = c->bw;
1070 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1071 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1072 configure(c); /* propagates border_width, if size doesn't change */
1073 updatesizehints(c);
1074 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1075 grabbuttons(c, False);
1076 updatetitle(c);
1077 if(XGetTransientForHint(dpy, w, &trans))
1078 t = getclient(trans);
1079 if(t)
1080 c->tags = t->tags;
1081 else
1082 applyrules(c);
1083 if(!c->isfloating)
1084 c->isfloating = trans != None || c->isfixed;
1085 if(c->isfloating)
1086 XRaiseWindow(dpy, c->win);
1087 attach(c);
1088 attachstack(c);
1089 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1090 XMapWindow(dpy, c->win);
1091 setclientstate(c, NormalState);
1092 arrange();
1093 }
1094
1095 void
1096 mappingnotify(XEvent *e) {
1097 XMappingEvent *ev = &e->xmapping;
1098
1099 XRefreshKeyboardMapping(ev);
1100 if(ev->request == MappingKeyboard)
1101 grabkeys();
1102 }
1103
1104 void
1105 maprequest(XEvent *e) {
1106 static XWindowAttributes wa;
1107 XMapRequestEvent *ev = &e->xmaprequest;
1108
1109 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1110 return;
1111 if(wa.override_redirect)
1112 return;
1113 if(!getclient(ev->window))
1114 manage(ev->window, &wa);
1115 }
1116
1117 void
1118 monocle(Monitor *m) {
1119 Client *c;
1120
1121 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1122 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw);
1123 }
1124
1125 void
1126 movemouse(const Arg *arg) {
1127 int x, y, ocx, ocy, di, nx, ny;
1128 unsigned int dui;
1129 Client *c;
1130 Window dummy;
1131 XEvent ev;
1132
1133 if(!(c = selmon->sel))
1134 return;
1135 restack(selmon);
1136 ocx = c->x;
1137 ocy = c->y;
1138 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1139 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1140 return;
1141 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
1142 do {
1143 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1144 switch (ev.type) {
1145 case ConfigureRequest:
1146 case Expose:
1147 case MapRequest:
1148 handler[ev.type](&ev);
1149 break;
1150 case MotionNotify:
1151 nx = ocx + (ev.xmotion.x - x);
1152 ny = ocy + (ev.xmotion.y - y);
1153 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1154 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1155 if(abs(selmon->wx - nx) < snap)
1156 nx = selmon->wx;
1157 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1158 nx = selmon->wx + selmon->ww - WIDTH(c);
1159 if(abs(selmon->wy - ny) < snap)
1160 ny = selmon->wy;
1161 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1162 ny = selmon->wy + selmon->wh - HEIGHT(c);
1163 if(!c->isfloating && lt[selmon->sellt]->arrange
1164 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1165 togglefloating(NULL);
1166 }
1167 if(!lt[selmon->sellt]->arrange || c->isfloating)
1168 resize(c, nx, ny, c->w, c->h);
1169 break;
1170 }
1171 }
1172 while(ev.type != ButtonRelease);
1173 XUngrabPointer(dpy, CurrentTime);
1174 }
1175
1176 Client *
1177 nexttiled(Client *c) {
1178 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1179 return c;
1180 }
1181
1182 void
1183 propertynotify(XEvent *e) {
1184 Client *c;
1185 Window trans;
1186 XPropertyEvent *ev = &e->xproperty;
1187
1188 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1189 updatestatus();
1190 else if(ev->state == PropertyDelete)
1191 return; /* ignore */
1192 else if((c = getclient(ev->window))) {
1193 switch (ev->atom) {
1194 default: break;
1195 case XA_WM_TRANSIENT_FOR:
1196 XGetTransientForHint(dpy, c->win, &trans);
1197 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1198 arrange();
1199 break;
1200 case XA_WM_NORMAL_HINTS:
1201 updatesizehints(c);
1202 break;
1203 case XA_WM_HINTS:
1204 updatewmhints(c);
1205 drawbars();
1206 break;
1207 }
1208 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1209 updatetitle(c);
1210 if(c == selmon->sel)
1211 drawbars();
1212 }
1213 }
1214 }
1215
1216 void
1217 quit(const Arg *arg) {
1218 running = False;
1219 }
1220
1221 void
1222 resize(Client *c, int x, int y, int w, int h) {
1223 XWindowChanges wc;
1224
1225 if(applysizehints(c, &x, &y, &w, &h)) {
1226 c->x = wc.x = x;
1227 c->y = wc.y = y;
1228 c->w = wc.width = w;
1229 c->h = wc.height = h;
1230 wc.border_width = c->bw;
1231 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1232 configure(c);
1233 XSync(dpy, False);
1234 }
1235 }
1236
1237 void
1238 resizemouse(const Arg *arg) {
1239 int ocx, ocy;
1240 int nw, nh;
1241 Client *c;
1242 XEvent ev;
1243
1244 if(!(c = selmon->sel))
1245 return;
1246 restack(selmon);
1247 ocx = c->x;
1248 ocy = c->y;
1249 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1250 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1251 return;
1252 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1253 do {
1254 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1255 switch(ev.type) {
1256 case ConfigureRequest:
1257 case Expose:
1258 case MapRequest:
1259 handler[ev.type](&ev);
1260 break;
1261 case MotionNotify:
1262 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1263 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1264
1265 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1266 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1267 if(!c->isfloating && lt[selmon->sellt]->arrange
1268 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1269 togglefloating(NULL);
1270 }
1271 if(!lt[selmon->sellt]->arrange || c->isfloating)
1272 resize(c, c->x, c->y, nw, nh);
1273 break;
1274 }
1275 }
1276 while(ev.type != ButtonRelease);
1277 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1278 XUngrabPointer(dpy, CurrentTime);
1279 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1280 }
1281
1282 void
1283 restack(Monitor *m) {
1284 Client *c;
1285 XEvent ev;
1286 XWindowChanges wc;
1287
1288 drawbars();
1289 if(!m->sel)
1290 return;
1291 if(m->sel->isfloating || !lt[m->sellt]->arrange)
1292 XRaiseWindow(dpy, m->sel->win);
1293 if(lt[m->sellt]->arrange) {
1294 wc.stack_mode = Below;
1295 wc.sibling = m->barwin;
1296 for(c = m->stack; c; c = c->snext)
1297 if(!c->isfloating && ISVISIBLE(c)) {
1298 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1299 wc.sibling = c->win;
1300 }
1301 }
1302 XSync(dpy, False);
1303 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1304 }
1305
1306 void
1307 run(void) {
1308 XEvent ev;
1309
1310 /* main event loop */
1311 XSync(dpy, False);
1312 while(running && !XNextEvent(dpy, &ev)) {
1313 if(handler[ev.type])
1314 (handler[ev.type])(&ev); /* call handler */
1315 }
1316 }
1317
1318 void
1319 scan(void) {
1320 unsigned int i, num;
1321 Window d1, d2, *wins = NULL;
1322 XWindowAttributes wa;
1323
1324 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1325 for(i = 0; i < num; i++) {
1326 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1327 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1328 continue;
1329 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1330 manage(wins[i], &wa);
1331 }
1332 for(i = 0; i < num; i++) { /* now the transients */
1333 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1334 continue;
1335 if(XGetTransientForHint(dpy, wins[i], &d1)
1336 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1337 manage(wins[i], &wa);
1338 }
1339 if(wins)
1340 XFree(wins);
1341 }
1342 }
1343
1344 void
1345 setclientstate(Client *c, long state) {
1346 long data[] = {state, None};
1347
1348 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1349 PropModeReplace, (unsigned char *)data, 2);
1350 }
1351
1352 void
1353 setlayout(const Arg *arg) {
1354 if(!arg || !arg->v || arg->v != lt[selmon->sellt])
1355 selmon->sellt ^= 1;
1356 if(arg && arg->v)
1357 lt[selmon->sellt] = (Layout *)arg->v;
1358 if(selmon->sel)
1359 arrange();
1360 else
1361 drawbars();
1362 }
1363
1364 /* arg > 1.0 will set mfact absolutly */
1365 void
1366 setmfact(const Arg *arg) {
1367 float f;
1368
1369 if(!arg || !lt[selmon->sellt]->arrange)
1370 return;
1371 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1372 if(f < 0.1 || f > 0.9)
1373 return;
1374 selmon->mfact = f;
1375 arrange();
1376 }
1377
1378 void
1379 setup(void) {
1380 unsigned int i;
1381 int w;
1382 XSetWindowAttributes wa;
1383
1384 /* init screen */
1385 screen = DefaultScreen(dpy);
1386 root = RootWindow(dpy, screen);
1387 initfont(font);
1388 sx = 0;
1389 sy = 0;
1390 sw = DisplayWidth(dpy, screen);
1391 sh = DisplayHeight(dpy, screen);
1392 bh = dc.h = dc.font.height + 2;
1393 lt[0] = &layouts[0];
1394 lt[1] = &layouts[1 % LENGTH(layouts)];
1395 updategeom();
1396
1397 /* init atoms */
1398 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1399 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1400 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1401 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1402 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1403
1404 /* init cursors */
1405 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1406 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1407 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1408
1409 /* init appearance */
1410 dc.norm[ColBorder] = getcolor(normbordercolor);
1411 dc.norm[ColBG] = getcolor(normbgcolor);
1412 dc.norm[ColFG] = getcolor(normfgcolor);
1413 dc.sel[ColBorder] = getcolor(selbordercolor);
1414 dc.sel[ColBG] = getcolor(selbgcolor);
1415 dc.sel[ColFG] = getcolor(selfgcolor);
1416 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1417 dc.gc = XCreateGC(dpy, root, 0, NULL);
1418 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1419 if(!dc.font.set)
1420 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1421
1422 /* init bars */
1423 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1424 w = TEXTW(layouts[i].symbol);
1425 blw = MAX(blw, w);
1426 }
1427 updatebars();
1428 updatestatus();
1429
1430 /* EWMH support per view */
1431 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1432 PropModeReplace, (unsigned char *) netatom, NetLast);
1433
1434 /* select for events */
1435 wa.cursor = cursor[CurNormal];
1436 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1437 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1438 |PropertyChangeMask;
1439 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1440 XSelectInput(dpy, root, wa.event_mask);
1441
1442 grabkeys();
1443 }
1444
1445 void
1446 showhide(Client *c) {
1447 if(!c)
1448 return;
1449 if(ISVISIBLE(c)) { /* show clients top down */
1450 XMoveWindow(dpy, c->win, c->x, c->y);
1451 if(!lt[c->mon->sellt]->arrange || c->isfloating)
1452 resize(c, c->x, c->y, c->w, c->h);
1453 showhide(c->snext);
1454 }
1455 else { /* hide clients bottom up */
1456 showhide(c->snext);
1457 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1458 }
1459 }
1460
1461
1462 void
1463 sigchld(int signal) {
1464 while(0 < waitpid(-1, NULL, WNOHANG));
1465 }
1466
1467 void
1468 spawn(const Arg *arg) {
1469 signal(SIGCHLD, sigchld);
1470 if(fork() == 0) {
1471 if(dpy)
1472 close(ConnectionNumber(dpy));
1473 setsid();
1474 execvp(((char **)arg->v)[0], (char **)arg->v);
1475 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1476 perror(" failed");
1477 exit(0);
1478 }
1479 }
1480
1481 void
1482 tag(const Arg *arg) {
1483 if(selmon->sel && arg->ui & TAGMASK) {
1484 selmon->sel->tags = arg->ui & TAGMASK;
1485 arrange();
1486 }
1487 }
1488
1489 #ifdef XINERAMA
1490 void
1491 tagmon(const Arg *arg) {
1492 unsigned int i;
1493 Client *c;
1494 Monitor *m;
1495
1496 if(!(c = selmon->sel))
1497 return;
1498 for(i = 0, m = mons; m; m = m->next, i++)
1499 if(i == arg->ui) {
1500 detach(c);
1501 detachstack(c);
1502 c->mon = m;
1503 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1504 attach(c);
1505 attachstack(c);
1506 focus(NULL);
1507 arrange();
1508 break;
1509 }
1510 }
1511 #endif /* XINERAMA */
1512
1513 int
1514 textnw(const char *text, unsigned int len) {
1515 XRectangle r;
1516
1517 if(dc.font.set) {
1518 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1519 return r.width;
1520 }
1521 return XTextWidth(dc.font.xfont, text, len);
1522 }
1523
1524 void
1525 tile(Monitor *m) {
1526 int x, y, h, w, mw;
1527 unsigned int i, n;
1528 Client *c;
1529
1530 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1531 if(n == 0)
1532 return;
1533
1534 /* master */
1535 c = nexttiled(m->clients);
1536 mw = m->mfact * m->ww;
1537 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw);
1538
1539 if(--n == 0)
1540 return;
1541
1542 /* tile stack */
1543 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1544 y = m->wy;
1545 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1546 h = m->wh / n;
1547 if(h < bh)
1548 h = m->wh;
1549
1550 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1551 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1552 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw));
1553 if(h != m->wh)
1554 y = c->y + HEIGHT(c);
1555 }
1556 }
1557
1558 void
1559 togglebar(const Arg *arg) {
1560 selmon->showbar = !selmon->showbar;
1561 updatebarpos(selmon);
1562 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1563 arrange();
1564 }
1565
1566 void
1567 togglefloating(const Arg *arg) {
1568 if(!selmon->sel)
1569 return;
1570 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1571 if(selmon->sel->isfloating)
1572 resize(selmon->sel, selmon->sel->x, selmon->sel->y, selmon->sel->w, selmon->sel->h);
1573 arrange();
1574 }
1575
1576 void
1577 toggletag(const Arg *arg) {
1578 unsigned int mask;
1579
1580 if(!selmon->sel)
1581 return;
1582
1583 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1584 if(mask) {
1585 selmon->sel->tags = mask;
1586 arrange();
1587 }
1588 }
1589
1590 void
1591 toggleview(const Arg *arg) {
1592 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1593
1594 if(mask) {
1595 selmon->tagset[selmon->seltags] = mask;
1596 arrange();
1597 }
1598 }
1599
1600 void
1601 unfocus(Client *c) {
1602 if(!c)
1603 return;
1604 grabbuttons(c, False);
1605 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1606 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1607 }
1608
1609 void
1610 unmanage(Client *c) {
1611 XWindowChanges wc;
1612
1613 wc.border_width = c->oldbw;
1614 /* The server grab construct avoids race conditions. */
1615 XGrabServer(dpy);
1616 XSetErrorHandler(xerrordummy);
1617 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1618 detach(c);
1619 detachstack(c);
1620 if(c->mon->sel == c) {
1621 /* TODO: consider separate the next code into a function or into detachstack? */
1622 Client *tc;
1623 for(tc = c->mon->stack; tc && !ISVISIBLE(tc); tc = tc->snext);
1624 c->mon->sel = tc;
1625 focus(NULL);
1626 }
1627 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1628 setclientstate(c, WithdrawnState);
1629 free(c);
1630 XSync(dpy, False);
1631 XSetErrorHandler(xerror);
1632 XUngrabServer(dpy);
1633 arrange();
1634 }
1635
1636 void
1637 unmapnotify(XEvent *e) {
1638 Client *c;
1639 XUnmapEvent *ev = &e->xunmap;
1640
1641 if((c = getclient(ev->window)))
1642 unmanage(c);
1643 }
1644
1645 void
1646 updatebars(void) {
1647 Monitor *m;
1648 XSetWindowAttributes wa;
1649
1650 wa.override_redirect = True;
1651 wa.background_pixmap = ParentRelative;
1652 wa.event_mask = ButtonPressMask|ExposureMask;
1653
1654 for(m = mons; m; m = m->next) {
1655 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1656
1657 CopyFromParent, DefaultVisual(dpy, screen),
1658 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1659 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1660 XMapRaised(dpy, m->barwin);
1661 }
1662 }
1663
1664 void
1665 updatebarpos(Monitor *m) {
1666 m->wy = m->my;
1667 m->wh = m->mh;
1668 if(m->showbar) {
1669 m->wh -= bh;
1670 m->by = m->topbar ? m->wy : m->wy + m->wh;
1671 m->wy = m->topbar ? m->wy + bh : m->wy;
1672 }
1673 else
1674 m->by = -bh;
1675 }
1676
1677 void
1678 updategeom(void) {
1679 int i, di, n = 1, x, y;
1680 unsigned int dui;
1681 Client *c;
1682 Monitor *newmons = NULL, *m, *tm;
1683 Window dummy;
1684
1685 #ifdef XINULATOR
1686 n = 2;
1687 #elif defined(XINERAMA)
1688 XineramaScreenInfo *info = NULL;
1689
1690 if(XineramaIsActive(dpy))
1691 info = XineramaQueryScreens(dpy, &n);
1692 #endif
1693 /* allocate monitor(s) for the new geometry setup */
1694 for(i = 0; i < n; i++) {
1695 m = (Monitor *)malloc(sizeof(Monitor));
1696 m->next = newmons;
1697 newmons = m;
1698 }
1699
1700 /* initialise monitor(s) */
1701 #ifdef XINULATOR
1702 if(1) {
1703 m = newmons;
1704 m->screen_number = 0;
1705 m->wx = sx;
1706 m->my = m->wy = sy;
1707 m->ww = sw;
1708 m->mh = m->wh = sh / 2;
1709 m = newmons->next;
1710 m->screen_number = 1;
1711 m->wx = sx;
1712 m->my = m->wy = sy + sh / 2;
1713 m->ww = sw;
1714 m->mh = m->wh = sh / 2;
1715 }
1716 else
1717 #elif defined(XINERAMA)
1718 if(XineramaIsActive(dpy)) {
1719 for(i = 0, m = newmons; m; m = m->next, i++) {
1720 m->screen_number = info[i].screen_number;
1721 m->wx = info[i].x_org;
1722 m->my = m->wy = info[i].y_org;
1723 m->ww = info[i].width;
1724 m->mh = m->wh = info[i].height;
1725 }
1726 XFree(info);
1727 }
1728 else
1729 #endif
1730 /* default monitor setup */
1731 {
1732 m->screen_number = 0;
1733 m->wx = sx;
1734 m->my = m->wy = sy;
1735 m->ww = sw;
1736 m->mh = m->wh = sh;
1737 }
1738
1739 /* bar geometry setup */
1740 for(m = newmons; m; m = m->next) {
1741 /* TODO: consider removing the following values from config.h */
1742 m->clients = NULL;
1743 m->sel = NULL;
1744 m->stack = NULL;
1745 m->seltags = 0;
1746 m->sellt = 0;
1747 m->tagset[0] = m->tagset[1] = 1;
1748 m->mfact = mfact;
1749 m->showbar = showbar;
1750 m->topbar = topbar;
1751 updatebarpos(m);
1752 }
1753
1754 /* reassign left over clients of disappeared monitors */
1755 for(tm = mons; tm; tm = tm->next)
1756 while(tm->clients) {
1757 c = tm->clients;
1758 tm->clients = c->next;
1759 detachstack(c);
1760 c->mon = newmons;
1761 attach(c);
1762 attachstack(c);
1763 }
1764
1765 /* select focused monitor */
1766 selmon = newmons;
1767 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1768 for(m = newmons; m; m = m->next)
1769 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh)) {
1770 selmon = m;
1771 break;
1772 }
1773
1774 /* final assignment of new monitors */
1775 cleanupmons();
1776 mons = newmons;
1777 }
1778
1779 void
1780 updatenumlockmask(void) {
1781 unsigned int i, j;
1782 XModifierKeymap *modmap;
1783
1784 numlockmask = 0;
1785 modmap = XGetModifierMapping(dpy);
1786 for(i = 0; i < 8; i++)
1787 for(j = 0; j < modmap->max_keypermod; j++)
1788 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1789 == XKeysymToKeycode(dpy, XK_Num_Lock))
1790 numlockmask = (1 << i);
1791 XFreeModifiermap(modmap);
1792 }
1793
1794 void
1795 updatesizehints(Client *c) {
1796 long msize;
1797 XSizeHints size;
1798
1799 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1800 /* size is uninitialized, ensure that size.flags aren't used */
1801 size.flags = PSize;
1802 if(size.flags & PBaseSize) {
1803 c->basew = size.base_width;
1804 c->baseh = size.base_height;
1805 }
1806 else if(size.flags & PMinSize) {
1807 c->basew = size.min_width;
1808 c->baseh = size.min_height;
1809 }
1810 else
1811 c->basew = c->baseh = 0;
1812 if(size.flags & PResizeInc) {
1813 c->incw = size.width_inc;
1814 c->inch = size.height_inc;
1815 }
1816 else
1817 c->incw = c->inch = 0;
1818 if(size.flags & PMaxSize) {
1819 c->maxw = size.max_width;
1820 c->maxh = size.max_height;
1821 }
1822 else
1823 c->maxw = c->maxh = 0;
1824 if(size.flags & PMinSize) {
1825 c->minw = size.min_width;
1826 c->minh = size.min_height;
1827 }
1828 else if(size.flags & PBaseSize) {
1829 c->minw = size.base_width;
1830 c->minh = size.base_height;
1831 }
1832 else
1833 c->minw = c->minh = 0;
1834 if(size.flags & PAspect) {
1835 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1836 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1837 }
1838 else
1839 c->maxa = c->mina = 0.0;
1840 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1841 && c->maxw == c->minw && c->maxh == c->minh);
1842 }
1843
1844 void
1845 updatetitle(Client *c) {
1846 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1847 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1848 }
1849
1850 void
1851 updatestatus() {
1852 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1853 strcpy(stext, "dwm-"VERSION);
1854 drawbar(selmon);
1855 }
1856
1857 void
1858 updatewmhints(Client *c) {
1859 XWMHints *wmh;
1860
1861 if((wmh = XGetWMHints(dpy, c->win))) {
1862 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1863 wmh->flags &= ~XUrgencyHint;
1864 XSetWMHints(dpy, c->win, wmh);
1865 }
1866 else
1867 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1868
1869 XFree(wmh);
1870 }
1871 }
1872
1873 void
1874 view(const Arg *arg) {
1875 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1876 return;
1877 selmon->seltags ^= 1; /* toggle sel tagset */
1878 if(arg->ui & TAGMASK)
1879 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1880 arrange();
1881 }
1882
1883 /* There's no way to check accesses to destroyed windows, thus those cases are
1884 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1885 * default error handler, which may call exit. */
1886 int
1887 xerror(Display *dpy, XErrorEvent *ee) {
1888 if(ee->error_code == BadWindow
1889 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1890 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1891 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1892 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1893 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1894 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1895 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1896 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1897 return 0;
1898 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1899 ee->request_code, ee->error_code);
1900 return xerrorxlib(dpy, ee); /* may call exit */
1901 }
1902
1903 int
1904 xerrordummy(Display *dpy, XErrorEvent *ee) {
1905 return 0;
1906 }
1907
1908 /* Startup Error handler to check if another window manager
1909 * is already running. */
1910 int
1911 xerrorstart(Display *dpy, XErrorEvent *ee) {
1912 otherwm = True;
1913 return -1;
1914 }
1915
1916 void
1917 zoom(const Arg *arg) {
1918 Client *c = selmon->sel;
1919
1920 if(!lt[selmon->sellt]->arrange || lt[selmon->sellt]->arrange == monocle || (selmon->sel && selmon->sel->isfloating))
1921 return;
1922 if(c == nexttiled(selmon->clients))
1923 if(!c || !(c = nexttiled(c->next)))
1924 return;
1925 detach(c);
1926 attach(c);
1927 focus(c);
1928 arrange();
1929 }
1930
1931 int
1932 main(int argc, char *argv[]) {
1933 if(argc == 2 && !strcmp("-v", argv[1]))
1934 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1935 else if(argc != 1)
1936 die("usage: dwm [-v]\n");
1937
1938 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1939 fputs("warning: no locale support\n", stderr);
1940
1941 if(!(dpy = XOpenDisplay(NULL)))
1942 die("dwm: cannot open display\n");
1943
1944 checkotherwm();
1945 setup();
1946 scan();
1947 run();
1948 cleanup();
1949
1950 XCloseDisplay(dpy);
1951 return 0;
1952 }