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