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[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * The event handlers of dwm are organized in an array which is accessed
10 * whenever a new event has been fetched. This allows event dispatching
11 * in O(1) time.
12 *
13 * Each child of the root window is called a client, except windows which have
14 * set the override_redirect flag. Clients are organized in a global
15 * linked client list, the focus history is remembered through a global
16 * stack list. Each client contains a bit array to indicate the tags of a
17 * client.
18 *
19 * Keys and tagging rules are organized as arrays and defined in config.h.
20 *
21 * To understand everything else, start reading main().
22 */
23 #include <errno.h>
24 #include <locale.h>
25 #include <stdarg.h>
26 #include <signal.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <sys/types.h>
32 #include <sys/wait.h>
33 #include <X11/cursorfont.h>
34 #include <X11/keysym.h>
35 #include <X11/Xatom.h>
36 #include <X11/Xlib.h>
37 #include <X11/Xproto.h>
38 #include <X11/Xutil.h>
39 #ifdef XINERAMA
40 #include <X11/extensions/Xinerama.h>
41 #endif /* XINERAMA */
42
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
47 #define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
48 #define LENGTH(X) (sizeof X / sizeof X[0])
49 #define MAX(A, B) ((A) > (B) ? (A) : (B))
50 #define MIN(A, B) ((A) < (B) ? (A) : (B))
51 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
52 #define WIDTH(X) ((X)->w + 2 * (X)->bw)
53 #define HEIGHT(X) ((X)->h + 2 * (X)->bw)
54 #define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
55 #define TEXTW(X) (textnw(X, strlen(X)) + dc.font.height)
56
57 /* enums */
58 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
61 enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
62 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
63 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
64
65 typedef union {
66 int i;
67 unsigned int ui;
68 float f;
69 void *v;
70 } Arg;
71
72 typedef struct {
73 unsigned int click;
74 unsigned int mask;
75 unsigned int button;
76 void (*func)(const Arg *arg);
77 const Arg arg;
78 } Button;
79
80 typedef struct Monitor Monitor;
81 typedef struct Client Client;
82 struct Client {
83 char name[256];
84 float mina, maxa;
85 int x, y, w, h;
86 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
87 int bw, oldbw;
88 unsigned int tags;
89 Bool isfixed, isfloating, isurgent;
90 Client *next;
91 Client *snext;
92 Monitor *mon;
93 Window win;
94 };
95
96 typedef struct {
97 int x, y, w, h;
98 unsigned long norm[ColLast];
99 unsigned long sel[ColLast];
100 Drawable drawable;
101 GC gc;
102 struct {
103 int ascent;
104 int descent;
105 int height;
106 XFontSet set;
107 XFontStruct *xfont;
108 } font;
109 } DC; /* draw context */
110
111 typedef struct {
112 unsigned int mod;
113 KeySym keysym;
114 void (*func)(const Arg *);
115 const Arg arg;
116 } Key;
117
118 typedef struct {
119 const char *symbol;
120 void (*arrange)(Monitor *);
121 } Layout;
122
123 struct Monitor {
124 int screen_number;
125 float mfact;
126 int by, btx; /* bar geometry */
127 int mx, my, mw, mh; /* screen size */
128 int wx, wy, ww, wh; /* window area */
129 unsigned int seltags;
130 unsigned int sellt;
131 unsigned int tagset[2];
132 Bool showbar;
133 Bool topbar;
134 Client *clients;
135 Client *sel;
136 Client *stack;
137 Monitor *next;
138 Window barwin;
139 };
140
141 typedef struct {
142 const char *class;
143 const char *instance;
144 const char *title;
145 unsigned int tags;
146 Bool isfloating;
147 } Rule;
148
149 /* function declarations */
150 static void applyrules(Client *c);
151 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h);
152 static void arrange(void);
153 static void attach(Client *c);
154 static void attachstack(Client *c);
155 static void buttonpress(XEvent *e);
156 static void checkotherwm(void);
157 static void cleanup(void);
158 static void cleanupmons(void);
159 static void clearurgent(Client *c);
160 static void configure(Client *c);
161 static void configurenotify(XEvent *e);
162 static void configurerequest(XEvent *e);
163 static void destroynotify(XEvent *e);
164 static void detach(Client *c);
165 static void detachstack(Client *c);
166 static void die(const char *errstr, ...);
167 static void drawbar(Monitor *m);
168 static void drawbars(void);
169 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
170 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
171 static void enternotify(XEvent *e);
172 static void expose(XEvent *e);
173 static void focus(Client *c);
174 static void focusin(XEvent *e);
175 static void focusstack(const Arg *arg);
176 static unsigned long getcolor(const char *colstr);
177 static Bool getrootpointer(int *x, int *y);
178 static long getstate(Window w);
179 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
180 static void grabbuttons(Client *c, Bool focused);
181 static void grabkeys(void);
182 static Monitor *idxtomon(unsigned int n);
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 Monitor *pointertomon(int x, int y);
194 static void propertynotify(XEvent *e);
195 static void quit(const Arg *arg);
196 static void resize(Client *c, int x, int y, int w, int h);
197 static void resizemouse(const Arg *arg);
198 static void restack(Monitor *m);
199 static void run(void);
200 static void scan(void);
201 static void sendmon(Client *c, Monitor *m);
202 static void setclientstate(Client *c, long state);
203 static void setlayout(const Arg *arg);
204 static void setmfact(const Arg *arg);
205 static void setup(void);
206 static void showhide(Client *c);
207 static void sigchld(int signal);
208 static void spawn(const Arg *arg);
209 static void tag(const Arg *arg);
210 static int textnw(const char *text, unsigned int len);
211 static void tile(Monitor *);
212 static void togglebar(const Arg *arg);
213 static void togglefloating(const Arg *arg);
214 static void toggletag(const Arg *arg);
215 static void toggleview(const Arg *arg);
216 static void unfocus(Client *c);
217 static void unmanage(Client *c);
218 static void unmapnotify(XEvent *e);
219 static void updategeom(void);
220 static void updatebarpos(Monitor *m);
221 static void updatebars(void);
222 static void updatenumlockmask(void);
223 static void updatesizehints(Client *c);
224 static void updatestatus(void);
225 static void updatetitle(Client *c);
226 static void updatewmhints(Client *c);
227 static void view(const Arg *arg);
228 static Client *wintoclient(Window w);
229 static Monitor *wintomon(Window w);
230 static int xerror(Display *dpy, XErrorEvent *ee);
231 static int xerrordummy(Display *dpy, XErrorEvent *ee);
232 static int xerrorstart(Display *dpy, XErrorEvent *ee);
233 static void zoom(const Arg *arg);
234 #ifdef XINERAMA
235 static void focusmon(const Arg *arg);
236 static void tagmon(const Arg *arg);
237 #endif /* XINERAMA */
238
239 /* variables */
240 static char stext[256];
241 static int screen;
242 static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
243 static int bh, blw = 0; /* bar geometry */
244 static int (*xerrorxlib)(Display *, XErrorEvent *);
245 static unsigned int numlockmask = 0;
246 static void (*handler[LASTEvent]) (XEvent *) = {
247 [ButtonPress] = buttonpress,
248 [ConfigureRequest] = configurerequest,
249 [ConfigureNotify] = configurenotify,
250 [DestroyNotify] = destroynotify,
251 [EnterNotify] = enternotify,
252 [Expose] = expose,
253 [FocusIn] = focusin,
254 [KeyPress] = keypress,
255 [MappingNotify] = mappingnotify,
256 [MapRequest] = maprequest,
257 [PropertyNotify] = propertynotify,
258 [UnmapNotify] = unmapnotify
259 };
260 static Atom wmatom[WMLast], netatom[NetLast];
261 static Bool otherwm;
262 static Bool running = True;
263 static Cursor cursor[CurLast];
264 static Display *dpy;
265 static DC dc;
266 static Layout *lt[] = { NULL, NULL };
267 static Monitor *mons = NULL, *selmon = NULL;
268 static Window root;
269 /* configuration, allows nested code to access above variables */
270 #include "config.h"
271
272 /* compile-time check if all tags fit into an unsigned int bit array. */
273 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
274
275 /* function implementations */
276 void
277 applyrules(Client *c) {
278 unsigned int i;
279 Rule *r;
280 XClassHint ch = { 0 };
281
282 /* rule matching */
283 c->isfloating = c->tags = 0;
284 if(XGetClassHint(dpy, c->win, &ch)) {
285 for(i = 0; i < LENGTH(rules); i++) {
286 r = &rules[i];
287 if((!r->title || strstr(c->name, r->title))
288 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
289 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
290 c->isfloating = r->isfloating;
291 c->tags |= r->tags;
292 }
293 }
294 if(ch.res_class)
295 XFree(ch.res_class);
296 if(ch.res_name)
297 XFree(ch.res_name);
298 }
299 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
300 }
301
302 Bool
303 applysizehints(Client *c, int *x, int *y, int *w, int *h) {
304 Bool baseismin;
305
306 /* set minimum possible */
307 *w = MAX(1, *w);
308 *h = MAX(1, *h);
309
310 if(*x > sx + sw)
311 *x = sw - WIDTH(c);
312 if(*y > sy + sh)
313 *y = sh - HEIGHT(c);
314 if(*x + *w + 2 * c->bw < sx)
315 *x = sx;
316 if(*y + *h + 2 * c->bw < sy)
317 *y = sy;
318 if(*h < bh)
319 *h = bh;
320 if(*w < bh)
321 *w = bh;
322
323 if(resizehints || c->isfloating) {
324 /* see last two sentences in ICCCM 4.1.2.3 */
325 baseismin = c->basew == c->minw && c->baseh == c->minh;
326
327 if(!baseismin) { /* temporarily remove base dimensions */
328 *w -= c->basew;
329 *h -= c->baseh;
330 }
331
332 /* adjust for aspect limits */
333 if(c->mina > 0 && c->maxa > 0) {
334 if(c->maxa < (float)*w / *h)
335 *w = *h * c->maxa;
336 else if(c->mina < (float)*h / *w)
337 *h = *w * c->mina;
338 }
339
340 if(baseismin) { /* increment calculation requires this */
341 *w -= c->basew;
342 *h -= c->baseh;
343 }
344
345 /* adjust for increment value */
346 if(c->incw)
347 *w -= *w % c->incw;
348 if(c->inch)
349 *h -= *h % c->inch;
350
351 /* restore base dimensions */
352 *w += c->basew;
353 *h += c->baseh;
354
355 *w = MAX(*w, c->minw);
356 *h = MAX(*h, c->minh);
357
358 if(c->maxw)
359 *w = MIN(*w, c->maxw);
360
361 if(c->maxh)
362 *h = MIN(*h, c->maxh);
363 }
364 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
365 }
366
367 void
368 arrange(void) {
369 Monitor *m;
370
371 /* optimise two loops into one, check focus(NULL) */
372 for(m = mons; m; m = m->next)
373 showhide(m->stack);
374 focus(NULL);
375 for(m = mons; m; m = m->next) {
376 if(lt[m->sellt]->arrange)
377 lt[m->sellt]->arrange(m);
378 restack(m);
379 }
380 }
381
382 void
383 attach(Client *c) {
384 c->next = c->mon->clients;
385 c->mon->clients = c;
386 }
387
388 void
389 attachstack(Client *c) {
390 c->snext = c->mon->stack;
391 c->mon->stack = c;
392 }
393
394 void
395 buttonpress(XEvent *e) {
396 unsigned int i, x, click;
397 Arg arg = {0};
398 Client *c;
399 Monitor *m;
400 XButtonPressedEvent *ev = &e->xbutton;
401
402 click = ClkRootWin;
403 /* focus monitor if necessary */
404 if((m = wintomon(ev->window)) && m != selmon) {
405 unfocus(selmon->sel);
406 selmon = m;
407 focus(NULL);
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 = wintoclient(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 for(m = mons; m; m = m->next)
460 while(m->stack)
461 unmanage(m->stack);
462 if(dc.font.set)
463 XFreeFontSet(dpy, dc.font.set);
464 else
465 XFreeFont(dpy, dc.font.xfont);
466 XUngrabKey(dpy, AnyKey, AnyModifier, root);
467 XFreePixmap(dpy, dc.drawable);
468 XFreeGC(dpy, dc.gc);
469 XFreeCursor(dpy, cursor[CurNormal]);
470 XFreeCursor(dpy, cursor[CurResize]);
471 XFreeCursor(dpy, cursor[CurMove]);
472 cleanupmons();
473 XSync(dpy, False);
474 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
475 }
476
477 void
478 cleanupmons(void) {
479 Monitor *m;
480
481 while(mons) {
482 m = mons->next;
483 XUnmapWindow(dpy, mons->barwin);
484 XDestroyWindow(dpy, mons->barwin);
485 free(mons);
486 mons = m;
487 }
488 }
489
490 void
491 clearurgent(Client *c) {
492 XWMHints *wmh;
493
494 c->isurgent = False;
495 if(!(wmh = XGetWMHints(dpy, c->win)))
496 return;
497 wmh->flags &= ~XUrgencyHint;
498 XSetWMHints(dpy, c->win, wmh);
499 XFree(wmh);
500 }
501
502 void
503 configure(Client *c) {
504 XConfigureEvent ce;
505
506 ce.type = ConfigureNotify;
507 ce.display = dpy;
508 ce.event = c->win;
509 ce.window = c->win;
510 ce.x = c->x;
511 ce.y = c->y;
512 ce.width = c->w;
513 ce.height = c->h;
514 ce.border_width = c->bw;
515 ce.above = None;
516 ce.override_redirect = False;
517 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
518 }
519
520 void
521 configurenotify(XEvent *e) {
522 Monitor *m;
523 XConfigureEvent *ev = &e->xconfigure;
524
525 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
526 sw = ev->width;
527 sh = ev->height;
528 updategeom();
529 if(dc.drawable != 0)
530 XFreePixmap(dpy, dc.drawable);
531 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
532 updatebars();
533 for(m = mons; m; m = m->next)
534 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
535 arrange();
536 }
537 }
538
539 void
540 configurerequest(XEvent *e) {
541 Client *c;
542 Monitor *m;
543 XConfigureRequestEvent *ev = &e->xconfigurerequest;
544 XWindowChanges wc;
545
546 if((c = wintoclient(ev->window))) {
547 if(ev->value_mask & CWBorderWidth)
548 c->bw = ev->border_width;
549 else if(c->isfloating || !lt[selmon->sellt]->arrange) {
550 m = c->mon;
551 if(ev->value_mask & CWX)
552 c->x = m->mx + ev->x;
553 if(ev->value_mask & CWY)
554 c->y = m->my + 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 - m->mx + c->w) > m->mw && c->isfloating)
560 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
561 if((c->y - m->my + c->h) > m->mh && c->isfloating)
562 c->y = m->my + (m->mh / 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 = wintoclient(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, *t;
604
605 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
606 *tc = c->snext;
607
608 if(c == c->mon->sel) {
609 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
610 c->mon->sel = t;
611 }
612 }
613
614 void
615 die(const char *errstr, ...) {
616 va_list ap;
617
618 va_start(ap, errstr);
619 vfprintf(stderr, errstr, ap);
620 va_end(ap);
621 exit(EXIT_FAILURE);
622 }
623
624 void
625 drawbar(Monitor *m) {
626 int x;
627 unsigned int i, occ = 0, urg = 0;
628 unsigned long *col;
629 Client *c;
630
631 for(c = m->clients; c; c = c->next) {
632 occ |= c->tags;
633 if(c->isurgent)
634 urg |= c->tags;
635 }
636
637 dc.x = 0;
638 #ifdef XINERAMA
639 if(mons->next) { /* more than a single monitor */
640 char buf[2];
641 buf[0] = m->screen_number + '0';
642 buf[1] = '\0';
643 dc.w = TEXTW(buf);
644 drawtext(buf, selmon == m ? dc.sel : dc.norm, True);
645 dc.x += dc.w;
646 }
647 #endif /* XINERAMA */
648 m->btx = dc.x;
649 for(i = 0; i < LENGTH(tags); i++) {
650 dc.w = TEXTW(tags[i]);
651 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
652 drawtext(tags[i], col, urg & 1 << i);
653 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
654 occ & 1 << i, urg & 1 << i, col);
655 dc.x += dc.w;
656 }
657 if(blw > 0) {
658 dc.w = blw;
659 drawtext(lt[m->sellt]->symbol, dc.norm, False);
660 x = dc.x + dc.w;
661 }
662 else
663 x = dc.x;
664 if(m == selmon) { /* status is only drawn on selected monitor */
665 dc.w = TEXTW(stext);
666 dc.x = m->ww - dc.w;
667 if(dc.x < x) {
668 dc.x = x;
669 dc.w = m->ww - x;
670 }
671 drawtext(stext, dc.norm, False);
672 }
673 else {
674 dc.x = m->ww;
675 }
676 if((dc.w = dc.x - x) > bh) {
677 dc.x = x;
678 if(m->sel) {
679 col = m == selmon ? dc.sel : dc.norm;
680 drawtext(m->sel->name, col, False);
681 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
682 }
683 else
684 drawtext(NULL, dc.norm, False);
685 }
686 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
687 XSync(dpy, False);
688 }
689
690 void
691 drawbars(void) {
692 Monitor *m;
693
694 for(m = mons; m; m = m->next)
695 drawbar(m);
696 }
697
698 void
699 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
700 int x;
701 XGCValues gcv;
702 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
703
704 gcv.foreground = col[invert ? ColBG : ColFG];
705 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
706 x = (dc.font.ascent + dc.font.descent + 2) / 4;
707 r.x = dc.x + 1;
708 r.y = dc.y + 1;
709 if(filled) {
710 r.width = r.height = x + 1;
711 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
712 }
713 else if(empty) {
714 r.width = r.height = x;
715 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
716 }
717 }
718
719 void
720 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
721 char buf[256];
722 int i, x, y, h, len, olen;
723 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
724
725 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
726 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
727 if(!text)
728 return;
729 olen = strlen(text);
730 h = dc.font.ascent + dc.font.descent;
731 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
732 x = dc.x + (h / 2);
733 /* shorten text if necessary */
734 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
735 if(!len)
736 return;
737 memcpy(buf, text, len);
738 if(len < olen)
739 for(i = len; i && i > len - 3; buf[--i] = '.');
740 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
741 if(dc.font.set)
742 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
743 else
744 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
745 }
746
747 void
748 enternotify(XEvent *e) {
749 Client *c;
750 Monitor *m;
751 XCrossingEvent *ev = &e->xcrossing;
752
753 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
754 return;
755 if((m = wintomon(ev->window)) && m != selmon) {
756 unfocus(selmon->sel);
757 selmon = m;
758 }
759 if((c = wintoclient(ev->window)))
760 focus(c);
761 else
762 focus(NULL);
763 }
764
765 void
766 expose(XEvent *e) {
767 Monitor *m;
768 XExposeEvent *ev = &e->xexpose;
769
770 if(ev->count == 0 && (m = wintomon(ev->window)))
771 drawbar(m);
772 }
773
774 void
775 focus(Client *c) {
776 if(!c || !ISVISIBLE(c))
777 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
778 if(selmon->sel)
779 unfocus(selmon->sel);
780 if(c) {
781 if(c->mon != selmon)
782 selmon = c->mon;
783 if(c->isurgent)
784 clearurgent(c);
785 detachstack(c);
786 attachstack(c);
787 grabbuttons(c, True);
788 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
789 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
790 }
791 else
792 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
793 selmon->sel = c;
794 drawbars();
795 }
796
797 void
798 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
799 XFocusChangeEvent *ev = &e->xfocus;
800
801 if(selmon->sel && ev->window != selmon->sel->win)
802 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
803 }
804
805 #ifdef XINERAMA
806 void
807 focusmon(const Arg *arg) {
808 Monitor *m;
809
810 if(!(m = idxtomon(arg->ui)) || m == selmon)
811 return;
812 unfocus(selmon->sel);
813 selmon = m;
814 focus(NULL);
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 unsigned long
845 getcolor(const char *colstr) {
846 Colormap cmap = DefaultColormap(dpy, screen);
847 XColor color;
848
849 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
850 die("error, cannot allocate color '%s'\n", colstr);
851 return color.pixel;
852 }
853
854 Bool
855 getrootpointer(int *x, int *y) {
856 int di;
857 unsigned int dui;
858 Window dummy;
859 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
860 }
861
862 long
863 getstate(Window w) {
864 int format, status;
865 long result = -1;
866 unsigned char *p = NULL;
867 unsigned long n, extra;
868 Atom real;
869
870 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
871 &real, &format, &n, &extra, (unsigned char **)&p);
872 if(status != Success)
873 return -1;
874 if(n != 0)
875 result = *p;
876 XFree(p);
877 return result;
878 }
879
880 Bool
881 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
882 char **list = NULL;
883 int n;
884 XTextProperty name;
885
886 if(!text || size == 0)
887 return False;
888 text[0] = '\0';
889 XGetTextProperty(dpy, w, &name, atom);
890 if(!name.nitems)
891 return False;
892 if(name.encoding == XA_STRING)
893 strncpy(text, (char *)name.value, size - 1);
894 else {
895 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
896 && n > 0 && *list) {
897 strncpy(text, *list, size - 1);
898 XFreeStringList(list);
899 }
900 }
901 text[size - 1] = '\0';
902 XFree(name.value);
903 return True;
904 }
905
906 void
907 grabbuttons(Client *c, Bool focused) {
908 updatenumlockmask();
909 {
910 unsigned int i, j;
911 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
912 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
913 if(focused) {
914 for(i = 0; i < LENGTH(buttons); i++)
915 if(buttons[i].click == ClkClientWin)
916 for(j = 0; j < LENGTH(modifiers); j++)
917 XGrabButton(dpy, buttons[i].button,
918 buttons[i].mask | modifiers[j],
919 c->win, False, BUTTONMASK,
920 GrabModeAsync, GrabModeSync, None, None);
921 } else
922 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
923 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
924 }
925 }
926
927 void
928 grabkeys(void) {
929 updatenumlockmask();
930 { /* grab keys */
931 unsigned int i, j;
932 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
933 KeyCode code;
934
935 XUngrabKey(dpy, AnyKey, AnyModifier, root);
936 for(i = 0; i < LENGTH(keys); i++) {
937 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
938 for(j = 0; j < LENGTH(modifiers); j++)
939 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
940 True, GrabModeAsync, GrabModeAsync);
941 }
942 }
943 }
944
945 Monitor *
946 idxtomon(unsigned int n) {
947 unsigned int i;
948 Monitor *m;
949
950 for(m = mons, i = 0; m && i != n; m = m->next, i++);
951 return m;
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
1050 if(XGetTransientForHint(dpy, w, &trans))
1051 t = wintoclient(trans);
1052 if(t) {
1053 c->mon = t->mon;
1054 c->tags = t->tags;
1055 }
1056 else {
1057 c->mon = selmon;
1058 applyrules(c);
1059 }
1060
1061 /* geometry */
1062 c->x = wa->x + c->mon->wx;
1063 c->y = wa->y + c->mon->wy;
1064 c->w = wa->width;
1065 c->h = wa->height;
1066 c->oldbw = wa->border_width;
1067 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1068 c->x = c->mon->mx;
1069 c->y = c->mon->my;
1070 c->bw = 0;
1071 }
1072 else {
1073 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1074 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1075 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1076 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1077 c->x = MAX(c->x, c->mon->mx);
1078 /* only fix client y-offset, if the client center might cover the bar */
1079 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1080 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1081 c->bw = borderpx;
1082 }
1083
1084 wc.border_width = c->bw;
1085 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1086 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1087 configure(c); /* propagates border_width, if size doesn't change */
1088 updatesizehints(c);
1089 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1090 grabbuttons(c, False);
1091 updatetitle(c);
1092 if(!c->isfloating)
1093 c->isfloating = trans != None || c->isfixed;
1094 if(c->isfloating)
1095 XRaiseWindow(dpy, c->win);
1096 attach(c);
1097 attachstack(c);
1098 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1099 XMapWindow(dpy, c->win);
1100 setclientstate(c, NormalState);
1101 arrange();
1102 }
1103
1104 void
1105 mappingnotify(XEvent *e) {
1106 XMappingEvent *ev = &e->xmapping;
1107
1108 XRefreshKeyboardMapping(ev);
1109 if(ev->request == MappingKeyboard)
1110 grabkeys();
1111 }
1112
1113 void
1114 maprequest(XEvent *e) {
1115 static XWindowAttributes wa;
1116 XMapRequestEvent *ev = &e->xmaprequest;
1117
1118 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1119 return;
1120 if(wa.override_redirect)
1121 return;
1122 if(!wintoclient(ev->window))
1123 manage(ev->window, &wa);
1124 }
1125
1126 void
1127 monocle(Monitor *m) {
1128 Client *c;
1129
1130 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1131 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw);
1132 }
1133
1134 void
1135 movemouse(const Arg *arg) {
1136 int x, y, ocx, ocy, nx, ny;
1137 Client *c;
1138 Monitor *m;
1139 XEvent ev;
1140
1141 if(!(c = selmon->sel))
1142 return;
1143 restack(selmon);
1144 ocx = c->x;
1145 ocy = c->y;
1146 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1147 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1148 return;
1149 if(!getrootpointer(&x, &y))
1150 return;
1151 do {
1152 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1153 switch (ev.type) {
1154 case ConfigureRequest:
1155 case Expose:
1156 case MapRequest:
1157 handler[ev.type](&ev);
1158 break;
1159 case MotionNotify:
1160 nx = ocx + (ev.xmotion.x - x);
1161 ny = ocy + (ev.xmotion.y - y);
1162 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1163 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1164 if(abs(selmon->wx - nx) < snap)
1165 nx = selmon->wx;
1166 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1167 nx = selmon->wx + selmon->ww - WIDTH(c);
1168 if(abs(selmon->wy - ny) < snap)
1169 ny = selmon->wy;
1170 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1171 ny = selmon->wy + selmon->wh - HEIGHT(c);
1172 if(!c->isfloating && lt[selmon->sellt]->arrange
1173 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1174 togglefloating(NULL);
1175 }
1176 if(!lt[selmon->sellt]->arrange || c->isfloating)
1177 resize(c, nx, ny, c->w, c->h);
1178 break;
1179 }
1180 }
1181 while(ev.type != ButtonRelease);
1182 XUngrabPointer(dpy, CurrentTime);
1183 if((m = pointertomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1184 sendmon(c, m);
1185 selmon = m;
1186 focus(NULL);
1187 }
1188 }
1189
1190 Client *
1191 nexttiled(Client *c) {
1192 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1193 return c;
1194 }
1195
1196 Monitor *
1197 pointertomon(int x, int y) {
1198 Monitor *m;
1199
1200 for(m = mons; m; m = m->next)
1201 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1202 return m;
1203 return mons;
1204 }
1205
1206 void
1207 propertynotify(XEvent *e) {
1208 Client *c;
1209 Window trans;
1210 XPropertyEvent *ev = &e->xproperty;
1211
1212 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1213 updatestatus();
1214 else if(ev->state == PropertyDelete)
1215 return; /* ignore */
1216 else if((c = wintoclient(ev->window))) {
1217 switch (ev->atom) {
1218 default: break;
1219 case XA_WM_TRANSIENT_FOR:
1220 XGetTransientForHint(dpy, c->win, &trans);
1221 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1222 arrange();
1223 break;
1224 case XA_WM_NORMAL_HINTS:
1225 updatesizehints(c);
1226 break;
1227 case XA_WM_HINTS:
1228 updatewmhints(c);
1229 drawbars();
1230 break;
1231 }
1232 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1233 updatetitle(c);
1234 if(c == selmon->sel)
1235 drawbars();
1236 }
1237 }
1238 }
1239
1240 void
1241 quit(const Arg *arg) {
1242 running = False;
1243 }
1244
1245 void
1246 resize(Client *c, int x, int y, int w, int h) {
1247 XWindowChanges wc;
1248
1249 if(applysizehints(c, &x, &y, &w, &h)) {
1250 c->x = wc.x = x;
1251 c->y = wc.y = y;
1252 c->w = wc.width = w;
1253 c->h = wc.height = h;
1254 wc.border_width = c->bw;
1255 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1256 configure(c);
1257 XSync(dpy, False);
1258 }
1259 }
1260
1261 void
1262 resizemouse(const Arg *arg) {
1263 int ocx, ocy;
1264 int nw, nh;
1265 Client *c;
1266 Monitor *m;
1267 XEvent ev;
1268
1269 if(!(c = selmon->sel))
1270 return;
1271 restack(selmon);
1272 ocx = c->x;
1273 ocy = c->y;
1274 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1275 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1276 return;
1277 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1278 do {
1279 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1280 switch(ev.type) {
1281 case ConfigureRequest:
1282 case Expose:
1283 case MapRequest:
1284 handler[ev.type](&ev);
1285 break;
1286 case MotionNotify:
1287 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1288 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1289
1290 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1291 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1292 if(!c->isfloating && lt[selmon->sellt]->arrange
1293 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1294 togglefloating(NULL);
1295 }
1296 if(!lt[selmon->sellt]->arrange || c->isfloating)
1297 resize(c, c->x, c->y, nw, nh);
1298 break;
1299 }
1300 }
1301 while(ev.type != ButtonRelease);
1302 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1303 XUngrabPointer(dpy, CurrentTime);
1304 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1305 if((m = pointertomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1306 sendmon(c, m);
1307 selmon = m;
1308 focus(NULL);
1309 }
1310 }
1311
1312 void
1313 restack(Monitor *m) {
1314 Client *c;
1315 XEvent ev;
1316 XWindowChanges wc;
1317
1318 drawbars();
1319 if(!m->sel)
1320 return;
1321 if(m->sel->isfloating || !lt[m->sellt]->arrange)
1322 XRaiseWindow(dpy, m->sel->win);
1323 if(lt[m->sellt]->arrange) {
1324 wc.stack_mode = Below;
1325 wc.sibling = m->barwin;
1326 for(c = m->stack; c; c = c->snext)
1327 if(!c->isfloating && ISVISIBLE(c)) {
1328 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1329 wc.sibling = c->win;
1330 }
1331 }
1332 XSync(dpy, False);
1333 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1334 }
1335
1336 void
1337 run(void) {
1338 XEvent ev;
1339
1340 /* main event loop */
1341 XSync(dpy, False);
1342 while(running && !XNextEvent(dpy, &ev)) {
1343 if(handler[ev.type])
1344 (handler[ev.type])(&ev); /* call handler */
1345 }
1346 }
1347
1348 void
1349 scan(void) {
1350 unsigned int i, num;
1351 Window d1, d2, *wins = NULL;
1352 XWindowAttributes wa;
1353
1354 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1355 for(i = 0; i < num; i++) {
1356 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1357 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1358 continue;
1359 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1360 manage(wins[i], &wa);
1361 }
1362 for(i = 0; i < num; i++) { /* now the transients */
1363 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1364 continue;
1365 if(XGetTransientForHint(dpy, wins[i], &d1)
1366 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1367 manage(wins[i], &wa);
1368 }
1369 if(wins)
1370 XFree(wins);
1371 }
1372 }
1373
1374 void
1375 sendmon(Client *c, Monitor *m) {
1376 if(c->mon == m)
1377 return;
1378 detach(c);
1379 detachstack(c);
1380 c->mon = m;
1381 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1382 attach(c);
1383 attachstack(c);
1384 focus(NULL);
1385 arrange();
1386 }
1387
1388 void
1389 setclientstate(Client *c, long state) {
1390 long data[] = {state, None};
1391
1392 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1393 PropModeReplace, (unsigned char *)data, 2);
1394 }
1395
1396 void
1397 setlayout(const Arg *arg) {
1398 if(!arg || !arg->v || arg->v != lt[selmon->sellt])
1399 selmon->sellt ^= 1;
1400 if(arg && arg->v)
1401 lt[selmon->sellt] = (Layout *)arg->v;
1402 if(selmon->sel)
1403 arrange();
1404 else
1405 drawbars();
1406 }
1407
1408 /* arg > 1.0 will set mfact absolutly */
1409 void
1410 setmfact(const Arg *arg) {
1411 float f;
1412
1413 if(!arg || !lt[selmon->sellt]->arrange)
1414 return;
1415 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1416 if(f < 0.1 || f > 0.9)
1417 return;
1418 selmon->mfact = f;
1419 arrange();
1420 }
1421
1422 void
1423 setup(void) {
1424 unsigned int i;
1425 int w;
1426 XSetWindowAttributes wa;
1427
1428 /* init screen */
1429 screen = DefaultScreen(dpy);
1430 root = RootWindow(dpy, screen);
1431 initfont(font);
1432 sx = 0;
1433 sy = 0;
1434 sw = DisplayWidth(dpy, screen);
1435 sh = DisplayHeight(dpy, screen);
1436 bh = dc.h = dc.font.height + 2;
1437 lt[0] = &layouts[0];
1438 lt[1] = &layouts[1 % LENGTH(layouts)];
1439 updategeom();
1440
1441 /* init atoms */
1442 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1443 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1444 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1445 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1446 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1447
1448 /* init cursors */
1449 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1450 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1451 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1452
1453 /* init appearance */
1454 dc.norm[ColBorder] = getcolor(normbordercolor);
1455 dc.norm[ColBG] = getcolor(normbgcolor);
1456 dc.norm[ColFG] = getcolor(normfgcolor);
1457 dc.sel[ColBorder] = getcolor(selbordercolor);
1458 dc.sel[ColBG] = getcolor(selbgcolor);
1459 dc.sel[ColFG] = getcolor(selfgcolor);
1460 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1461 dc.gc = XCreateGC(dpy, root, 0, NULL);
1462 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1463 if(!dc.font.set)
1464 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1465
1466 /* init bars */
1467 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1468 w = TEXTW(layouts[i].symbol);
1469 blw = MAX(blw, w);
1470 }
1471 updatebars();
1472 updatestatus();
1473
1474 /* EWMH support per view */
1475 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1476 PropModeReplace, (unsigned char *) netatom, NetLast);
1477
1478 /* select for events */
1479 wa.cursor = cursor[CurNormal];
1480 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1481 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1482 |PropertyChangeMask;
1483 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1484 XSelectInput(dpy, root, wa.event_mask);
1485
1486 grabkeys();
1487 }
1488
1489 void
1490 showhide(Client *c) {
1491 if(!c)
1492 return;
1493 if(ISVISIBLE(c)) { /* show clients top down */
1494 XMoveWindow(dpy, c->win, c->x, c->y);
1495 if(!lt[c->mon->sellt]->arrange || c->isfloating)
1496 resize(c, c->x, c->y, c->w, c->h);
1497 showhide(c->snext);
1498 }
1499 else { /* hide clients bottom up */
1500 showhide(c->snext);
1501 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1502 }
1503 }
1504
1505
1506 void
1507 sigchld(int signal) {
1508 while(0 < waitpid(-1, NULL, WNOHANG));
1509 }
1510
1511 void
1512 spawn(const Arg *arg) {
1513 signal(SIGCHLD, sigchld);
1514 if(fork() == 0) {
1515 if(dpy)
1516 close(ConnectionNumber(dpy));
1517 setsid();
1518 execvp(((char **)arg->v)[0], (char **)arg->v);
1519 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1520 perror(" failed");
1521 exit(0);
1522 }
1523 }
1524
1525 void
1526 tag(const Arg *arg) {
1527 if(selmon->sel && arg->ui & TAGMASK) {
1528 selmon->sel->tags = arg->ui & TAGMASK;
1529 arrange();
1530 }
1531 }
1532
1533 #ifdef XINERAMA
1534 void
1535 tagmon(const Arg *arg) {
1536 Monitor *m;
1537
1538 if(!selmon->sel || !(m = idxtomon(arg->ui)))
1539 return;
1540 sendmon(selmon->sel, m);
1541 }
1542 #endif /* XINERAMA */
1543
1544 int
1545 textnw(const char *text, unsigned int len) {
1546 XRectangle r;
1547
1548 if(dc.font.set) {
1549 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1550 return r.width;
1551 }
1552 return XTextWidth(dc.font.xfont, text, len);
1553 }
1554
1555 void
1556 tile(Monitor *m) {
1557 int x, y, h, w, mw;
1558 unsigned int i, n;
1559 Client *c;
1560
1561 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1562 if(n == 0)
1563 return;
1564
1565 /* master */
1566 c = nexttiled(m->clients);
1567 mw = m->mfact * m->ww;
1568 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw);
1569
1570 if(--n == 0)
1571 return;
1572
1573 /* tile stack */
1574 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1575 y = m->wy;
1576 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1577 h = m->wh / n;
1578 if(h < bh)
1579 h = m->wh;
1580
1581 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1582 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1583 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw));
1584 if(h != m->wh)
1585 y = c->y + HEIGHT(c);
1586 }
1587 }
1588
1589 void
1590 togglebar(const Arg *arg) {
1591 selmon->showbar = !selmon->showbar;
1592 updatebarpos(selmon);
1593 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1594 arrange();
1595 }
1596
1597 void
1598 togglefloating(const Arg *arg) {
1599 if(!selmon->sel)
1600 return;
1601 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1602 if(selmon->sel->isfloating)
1603 resize(selmon->sel, selmon->sel->x, selmon->sel->y, selmon->sel->w, selmon->sel->h);
1604 arrange();
1605 }
1606
1607 void
1608 toggletag(const Arg *arg) {
1609 unsigned int mask;
1610
1611 if(!selmon->sel)
1612 return;
1613
1614 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1615 if(mask) {
1616 selmon->sel->tags = mask;
1617 arrange();
1618 }
1619 }
1620
1621 void
1622 toggleview(const Arg *arg) {
1623 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1624
1625 if(mask) {
1626 selmon->tagset[selmon->seltags] = mask;
1627 arrange();
1628 }
1629 }
1630
1631 void
1632 unfocus(Client *c) {
1633 if(!c)
1634 return;
1635 grabbuttons(c, False);
1636 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1637 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1638 }
1639
1640 void
1641 unmanage(Client *c) {
1642 XWindowChanges wc;
1643
1644 wc.border_width = c->oldbw;
1645 /* The server grab construct avoids race conditions. */
1646 XGrabServer(dpy);
1647 XSetErrorHandler(xerrordummy);
1648 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1649 detach(c);
1650 detachstack(c);
1651 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1652 setclientstate(c, WithdrawnState);
1653 free(c);
1654 XSync(dpy, False);
1655 XSetErrorHandler(xerror);
1656 XUngrabServer(dpy);
1657 focus(NULL);
1658 arrange();
1659 }
1660
1661 void
1662 unmapnotify(XEvent *e) {
1663 Client *c;
1664 XUnmapEvent *ev = &e->xunmap;
1665
1666 if((c = wintoclient(ev->window)))
1667 unmanage(c);
1668 }
1669
1670 void
1671 updatebars(void) {
1672 Monitor *m;
1673 XSetWindowAttributes wa;
1674
1675 wa.override_redirect = True;
1676 wa.background_pixmap = ParentRelative;
1677 wa.event_mask = ButtonPressMask|ExposureMask;
1678
1679 for(m = mons; m; m = m->next) {
1680 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1681
1682 CopyFromParent, DefaultVisual(dpy, screen),
1683 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1684 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1685 XMapRaised(dpy, m->barwin);
1686 }
1687 }
1688
1689 void
1690 updatebarpos(Monitor *m) {
1691 m->wy = m->my;
1692 m->wh = m->mh;
1693 if(m->showbar) {
1694 m->wh -= bh;
1695 m->by = m->topbar ? m->wy : m->wy + m->wh;
1696 m->wy = m->topbar ? m->wy + bh : m->wy;
1697 }
1698 else
1699 m->by = -bh;
1700 }
1701
1702 void
1703 updategeom(void) {
1704 int i, n = 1;
1705 Client *c;
1706 Monitor *newmons = NULL, *m, *tm;
1707
1708 #ifdef XINERAMA
1709 XineramaScreenInfo *info = NULL;
1710
1711 if(XineramaIsActive(dpy))
1712 info = XineramaQueryScreens(dpy, &n);
1713 #endif /* XINERAMA */
1714 /* allocate monitor(s) for the new geometry setup */
1715 for(i = 0; i < n; i++) {
1716 m = (Monitor *)malloc(sizeof(Monitor));
1717 m->next = newmons;
1718 newmons = m;
1719 }
1720
1721 /* initialise monitor(s) */
1722 #ifdef XINERAMA
1723 if(XineramaIsActive(dpy)) {
1724 for(i = 0, m = newmons; m; m = m->next, i++) {
1725 m->screen_number = info[i].screen_number;
1726 m->mx = m->wx = info[i].x_org;
1727 m->my = m->wy = info[i].y_org;
1728 m->mw = m->ww = info[i].width;
1729 m->mh = m->wh = info[i].height;
1730 }
1731 XFree(info);
1732 }
1733 else
1734 #endif /* XINERAMA */
1735 /* default monitor setup */
1736 {
1737 m->screen_number = 0;
1738 m->wx = sx;
1739 m->my = m->wy = sy;
1740 m->ww = sw;
1741 m->mh = m->wh = sh;
1742 }
1743
1744 /* bar geometry setup */
1745 for(m = newmons; m; m = m->next) {
1746 m->sel = m->stack = m->clients = NULL;
1747 m->seltags = 0;
1748 m->sellt = 0;
1749 m->tagset[0] = m->tagset[1] = 1;
1750 m->mfact = mfact;
1751 m->showbar = SHOWBAR;
1752 m->topbar = TOPBAR;
1753 updatebarpos(m);
1754 }
1755
1756 /* reassign left over clients of disappeared monitors */
1757 for(tm = mons; tm; tm = tm->next)
1758 while(tm->clients) {
1759 c = tm->clients;
1760 tm->clients = c->next;
1761 detachstack(c);
1762 c->mon = newmons;
1763 attach(c);
1764 attachstack(c);
1765 }
1766
1767 /* select focused monitor */
1768 cleanupmons();
1769 mons = newmons;
1770 selmon = wintomon(root);
1771 }
1772
1773 void
1774 updatenumlockmask(void) {
1775 unsigned int i, j;
1776 XModifierKeymap *modmap;
1777
1778 numlockmask = 0;
1779 modmap = XGetModifierMapping(dpy);
1780 for(i = 0; i < 8; i++)
1781 for(j = 0; j < modmap->max_keypermod; j++)
1782 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1783 == XKeysymToKeycode(dpy, XK_Num_Lock))
1784 numlockmask = (1 << i);
1785 XFreeModifiermap(modmap);
1786 }
1787
1788 void
1789 updatesizehints(Client *c) {
1790 long msize;
1791 XSizeHints size;
1792
1793 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1794 /* size is uninitialized, ensure that size.flags aren't used */
1795 size.flags = PSize;
1796 if(size.flags & PBaseSize) {
1797 c->basew = size.base_width;
1798 c->baseh = size.base_height;
1799 }
1800 else if(size.flags & PMinSize) {
1801 c->basew = size.min_width;
1802 c->baseh = size.min_height;
1803 }
1804 else
1805 c->basew = c->baseh = 0;
1806 if(size.flags & PResizeInc) {
1807 c->incw = size.width_inc;
1808 c->inch = size.height_inc;
1809 }
1810 else
1811 c->incw = c->inch = 0;
1812 if(size.flags & PMaxSize) {
1813 c->maxw = size.max_width;
1814 c->maxh = size.max_height;
1815 }
1816 else
1817 c->maxw = c->maxh = 0;
1818 if(size.flags & PMinSize) {
1819 c->minw = size.min_width;
1820 c->minh = size.min_height;
1821 }
1822 else if(size.flags & PBaseSize) {
1823 c->minw = size.base_width;
1824 c->minh = size.base_height;
1825 }
1826 else
1827 c->minw = c->minh = 0;
1828 if(size.flags & PAspect) {
1829 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1830 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1831 }
1832 else
1833 c->maxa = c->mina = 0.0;
1834 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1835 && c->maxw == c->minw && c->maxh == c->minh);
1836 }
1837
1838 void
1839 updatetitle(Client *c) {
1840 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1841 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1842 }
1843
1844 void
1845 updatestatus(void) {
1846 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1847 strcpy(stext, "dwm-"VERSION);
1848 drawbar(selmon);
1849 }
1850
1851 void
1852 updatewmhints(Client *c) {
1853 XWMHints *wmh;
1854
1855 if((wmh = XGetWMHints(dpy, c->win))) {
1856 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1857 wmh->flags &= ~XUrgencyHint;
1858 XSetWMHints(dpy, c->win, wmh);
1859 }
1860 else
1861 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1862
1863 XFree(wmh);
1864 }
1865 }
1866
1867 void
1868 view(const Arg *arg) {
1869 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1870 return;
1871 selmon->seltags ^= 1; /* toggle sel tagset */
1872 if(arg->ui & TAGMASK)
1873 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1874 arrange();
1875 }
1876
1877 Client *
1878 wintoclient(Window w) {
1879 Client *c;
1880 Monitor *m;
1881
1882 for(m = mons; m; m = m->next)
1883 for(c = m->clients; c; c = c->next)
1884 if(c->win == w)
1885 return c;
1886 return NULL;
1887 }
1888
1889 Monitor *
1890 wintomon(Window w) {
1891 int x, y;
1892 Client *c;
1893 Monitor *m;
1894
1895 if(w == root && getrootpointer(&x, &y))
1896 return pointertomon(x, y);
1897 for(m = mons; m; m = m->next)
1898 if(w == m->barwin)
1899 return m;
1900 if((c = wintoclient(w)))
1901 return c->mon;
1902 return mons;
1903 }
1904
1905 /* There's no way to check accesses to destroyed windows, thus those cases are
1906 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1907 * default error handler, which may call exit. */
1908 int
1909 xerror(Display *dpy, XErrorEvent *ee) {
1910 if(ee->error_code == BadWindow
1911 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1912 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1913 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1914 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1915 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1916 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1917 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1918 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1919 return 0;
1920 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1921 ee->request_code, ee->error_code);
1922 return xerrorxlib(dpy, ee); /* may call exit */
1923 }
1924
1925 int
1926 xerrordummy(Display *dpy, XErrorEvent *ee) {
1927 return 0;
1928 }
1929
1930 /* Startup Error handler to check if another window manager
1931 * is already running. */
1932 int
1933 xerrorstart(Display *dpy, XErrorEvent *ee) {
1934 otherwm = True;
1935 return -1;
1936 }
1937
1938 void
1939 zoom(const Arg *arg) {
1940 Client *c = selmon->sel;
1941
1942 if(!lt[selmon->sellt]->arrange || lt[selmon->sellt]->arrange == monocle || (selmon->sel && selmon->sel->isfloating))
1943 return;
1944 if(c == nexttiled(selmon->clients))
1945 if(!c || !(c = nexttiled(c->next)))
1946 return;
1947 detach(c);
1948 attach(c);
1949 focus(c);
1950 arrange();
1951 }
1952
1953 int
1954 main(int argc, char *argv[]) {
1955 if(argc == 2 && !strcmp("-v", argv[1]))
1956 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1957 else if(argc != 1)
1958 die("usage: dwm [-v]\n");
1959
1960 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1961 fputs("warning: no locale support\n", stderr);
1962
1963 if(!(dpy = XOpenDisplay(NULL)))
1964 die("dwm: cannot open display\n");
1965
1966 checkotherwm();
1967 setup();
1968 scan();
1969 run();
1970 cleanup();
1971
1972 XCloseDisplay(dpy);
1973 return 0;
1974 }