dwm.c - dwm

dwm.c (65111B)
      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 linked client
     15  * list on each monitor, the focus history is remembered through a stack list
     16  * on each monitor. 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 <signal.h>
     26 #include <stdarg.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 #include <X11/Xresource.h>
     40 #ifdef XINERAMA
     41 #include <X11/extensions/Xinerama.h>
     42 #endif /* XINERAMA */
     43 #include <X11/Xft/Xft.h>
     44 #include <X11/Xlib-xcb.h>
     45 #include <xcb/res.h>
     46 #ifdef __OpenBSD__
     47 #include <sys/sysctl.h>
     48 #include <kvm.h>
     49 #endif /* __OpenBSD */
     50 
     51 #include "drw.h"
     52 #include "util.h"
     53 
     54 /* macros */
     55 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
     56 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
     57 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
     58                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
     59 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]) || C->issticky)
     60 #define LENGTH(X)               (sizeof X / sizeof X[0])
     61 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
     62 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
     63 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
     64 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
     65 #define TEXTW(X)                (drw_fontset_getwidth(drw, (X)) + lrpad)
     66 
     67 #define OPAQUE                  0xffU
     68 
     69 /* enums */
     70 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
     71 enum { SchemeNorm, SchemeSel }; /* color schemes */
     72 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
     73        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
     74        NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
     75 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
     76 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkClientWin,
     77        ClkRootWin, ClkLast }; /* clicks */
     78 
     79 typedef union {
     80 	int i;
     81 	unsigned int ui;
     82 	float f;
     83 	const void *v;
     84 } Arg;
     85 
     86 typedef struct {
     87 	unsigned int click;
     88 	unsigned int mask;
     89 	unsigned int button;
     90 	void (*func)(const Arg *arg);
     91 	const Arg arg;
     92 } Button;
     93 
     94 typedef struct Monitor Monitor;
     95 typedef struct Client Client;
     96 struct Client {
     97 	char name[256];
     98 	float mina, maxa;
     99 	int x, y, w, h;
    100 	int oldx, oldy, oldw, oldh;
    101 	int basew, baseh, incw, inch, maxw, maxh, minw, minh;
    102 	int bw, oldbw;
    103 	unsigned int tags;
    104 	int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen, issticky, isterminal, noswallow;
    105 	pid_t pid;
    106 	Client *next;
    107 	Client *snext;
    108 	Client *swallowing;
    109 	Monitor *mon;
    110 	Window win;
    111 };
    112 
    113 typedef struct {
    114 	unsigned int mod;
    115 	KeySym keysym;
    116 	void (*func)(const Arg *);
    117 	const Arg arg;
    118 } Key;
    119 
    120 typedef struct {
    121     const char * sig;
    122     void (*func)(const Arg *);
    123 } Signal;
    124 
    125 typedef struct {
    126 	const char *symbol;
    127 	void (*arrange)(Monitor *);
    128 } Layout;
    129 
    130 struct Monitor {
    131 	char ltsymbol[16];
    132 	float mfact;
    133 	int nmaster;
    134 	int num;
    135 	int by;               /* bar geometry */
    136 	int mx, my, mw, mh;   /* screen size */
    137 	int wx, wy, ww, wh;   /* window area  */
    138 	int gappih;           /* horizontal gap between windows */
    139 	int gappiv;           /* vertical gap between windows */
    140 	int gappoh;           /* horizontal outer gaps */
    141 	int gappov;           /* vertical outer gaps */
    142 	unsigned int seltags;
    143 	unsigned int sellt;
    144 	unsigned int tagset[2];
    145 	int showbar;
    146 	int topbar;
    147 	Client *clients;
    148 	Client *sel;
    149 	Client *stack;
    150 	Monitor *next;
    151 	Window barwin;
    152 	const Layout *lt[2];
    153 };
    154 
    155 typedef struct {
    156 	const char *class;
    157 	const char *instance;
    158 	const char *title;
    159 	unsigned int tags;
    160 	int isfloating;
    161 	int isterminal;
    162 	int noswallow;
    163 	int monitor;
    164 } Rule;
    165 
    166 /* Xresources preferences */
    167 enum resource_type {
    168 	STRING = 0,
    169 	INTEGER = 1,
    170 	FLOAT = 2
    171 };
    172 
    173 typedef struct {
    174 	char *name;
    175 	enum resource_type type;
    176 	void *dst;
    177 } ResourcePref;
    178 
    179 /* function declarations */
    180 static void applyrules(Client *c);
    181 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
    182 static void arrange(Monitor *m);
    183 static void arrangemon(Monitor *m);
    184 static void attach(Client *c);
    185 static void attachstack(Client *c);
    186 static int fake_signal(void);
    187 static void buttonpress(XEvent *e);
    188 static void checkotherwm(void);
    189 static void cleanup(void);
    190 static void cleanupmon(Monitor *mon);
    191 static void clientmessage(XEvent *e);
    192 static void configure(Client *c);
    193 static void configurenotify(XEvent *e);
    194 static void configurerequest(XEvent *e);
    195 static Monitor *createmon(void);
    196 static void destroynotify(XEvent *e);
    197 static void detach(Client *c);
    198 static void detachstack(Client *c);
    199 static Monitor *dirtomon(int dir);
    200 static void drawbar(Monitor *m);
    201 static void drawbars(void);
    202 static void enternotify(XEvent *e);
    203 static void expose(XEvent *e);
    204 static void focus(Client *c);
    205 static void focusin(XEvent *e);
    206 static void focusmon(const Arg *arg);
    207 static void focusstack(const Arg *arg);
    208 static Atom getatomprop(Client *c, Atom prop);
    209 static int getrootptr(int *x, int *y);
    210 static long getstate(Window w);
    211 static pid_t getstatusbarpid();
    212 static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
    213 static void grabbuttons(Client *c, int focused);
    214 static void grabkeys(void);
    215 static void incnmaster(const Arg *arg);
    216 static void keypress(XEvent *e);
    217 static void killclient(const Arg *arg);
    218 static void manage(Window w, XWindowAttributes *wa);
    219 static void mappingnotify(XEvent *e);
    220 static void maprequest(XEvent *e);
    221 static void monocle(Monitor *m);
    222 static void motionnotify(XEvent *e);
    223 static void movemouse(const Arg *arg);
    224 static Client *nexttiled(Client *c);
    225 static void pop(Client *);
    226 static void propertynotify(XEvent *e);
    227 static void quit(const Arg *arg);
    228 static Monitor *recttomon(int x, int y, int w, int h);
    229 static void resize(Client *c, int x, int y, int w, int h, int interact);
    230 static void resizeclient(Client *c, int x, int y, int w, int h);
    231 static void resizemouse(const Arg *arg);
    232 static void restack(Monitor *m);
    233 static void run(void);
    234 static void scan(void);
    235 static int sendevent(Client *c, Atom proto);
    236 static void sendmon(Client *c, Monitor *m);
    237 static void setclientstate(Client *c, long state);
    238 static void setfocus(Client *c);
    239 static void setfullscreen(Client *c, int fullscreen);
    240 static void setlayout(const Arg *arg);
    241 static void setmfact(const Arg *arg);
    242 static void setup(void);
    243 static void seturgent(Client *c, int urg);
    244 static void showhide(Client *c);
    245 static void sigchld(int unused);
    246 static void sigstatusbar(const Arg *arg);
    247 static void sighup(int unused);
    248 static void sigterm(int unused);
    249 static void spawn(const Arg *arg);
    250 static void tag(const Arg *arg);
    251 static void tagmon(const Arg *arg);
    252 static void togglebar(const Arg *arg);
    253 static void togglefloating(const Arg *arg);
    254 static void togglefullscr(const Arg *arg);
    255 static void togglesticky(const Arg *arg);
    256 static void toggletag(const Arg *arg);
    257 static void toggleview(const Arg *arg);
    258 static void unfocus(Client *c, int setfocus);
    259 static void unmanage(Client *c, int destroyed);
    260 static void unmapnotify(XEvent *e);
    261 static void updatebarpos(Monitor *m);
    262 static void updatebars(void);
    263 static void updateclientlist(void);
    264 static int updategeom(void);
    265 static void updatenumlockmask(void);
    266 static void updatesizehints(Client *c);
    267 static void updatestatus(void);
    268 static void updatetitle(Client *c);
    269 static void updatewindowtype(Client *c);
    270 static void updatewmhints(Client *c);
    271 static void view(const Arg *arg);
    272 static Client *wintoclient(Window w);
    273 static Monitor *wintomon(Window w);
    274 static int xerror(Display *dpy, XErrorEvent *ee);
    275 static int xerrordummy(Display *dpy, XErrorEvent *ee);
    276 static int xerrorstart(Display *dpy, XErrorEvent *ee);
    277 static void xinitvisual();
    278 static void zoom(const Arg *arg);
    279 static void autostart_exec(void);
    280 static void load_xresources(void);
    281 static void reload(const Arg *arg);
    282 static void resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst);
    283 
    284 static pid_t getparentprocess(pid_t p);
    285 static int isdescprocess(pid_t p, pid_t c);
    286 static Client *swallowingclient(Window w);
    287 static Client *termforwin(const Client *c);
    288 static pid_t winpid(Window w);
    289 
    290 /* variables */
    291 static const char broken[] = "broken";
    292 static char stext[256];
    293 static int statusw;
    294 static int statussig;
    295 static pid_t statuspid = -1;
    296 static int screen;
    297 static int sw, sh;           /* X display screen geometry width, height */
    298 static int bh, blw = 0;      /* bar geometry */
    299 static int lrpad;            /* sum of left and right padding for text */
    300 static int vp;               /* vertical padding for bar */
    301 static int sp;               /* side padding for bar */
    302 static int (*xerrorxlib)(Display *, XErrorEvent *);
    303 static unsigned int numlockmask = 0;
    304 static void (*handler[LASTEvent]) (XEvent *) = {
    305 	[ButtonPress] = buttonpress,
    306 	[ClientMessage] = clientmessage,
    307 	[ConfigureRequest] = configurerequest,
    308 	[ConfigureNotify] = configurenotify,
    309 	[DestroyNotify] = destroynotify,
    310 	[EnterNotify] = enternotify,
    311 	[Expose] = expose,
    312 	[FocusIn] = focusin,
    313 	[KeyPress] = keypress,
    314 	[MappingNotify] = mappingnotify,
    315 	[MapRequest] = maprequest,
    316 	[MotionNotify] = motionnotify,
    317 	[PropertyNotify] = propertynotify,
    318 	[UnmapNotify] = unmapnotify
    319 };
    320 static Atom wmatom[WMLast], netatom[NetLast];
    321 static int restart = 0;
    322 static int running = 1;
    323 static Cur *cursor[CurLast];
    324 static Clr **scheme;
    325 static Display *dpy;
    326 static Drw *drw;
    327 static Monitor *mons, *selmon;
    328 static Window root, wmcheckwin;
    329 static int useargb = 0;
    330 static Visual *visual;
    331 static int depth;
    332 static Colormap cmap;
    333 static xcb_connection_t *xcon;
    334 
    335 /* configuration, allows nested code to access above variables */
    336 #include "config.h"
    337 
    338 /* compile-time check if all tags fit into an unsigned int bit array. */
    339 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
    340 
    341 /* dwm will keep pid's of processes from autostart array and kill them at quit */
    342 static pid_t *autostart_pids;
    343 static size_t autostart_len;
    344 
    345 /* execute command from autostart array */
    346 static void
    347 autostart_exec() {
    348 	const char *const *p;
    349 	size_t i = 0;
    350 
    351 	/* count entries */
    352 	for (p = autostart; *p; autostart_len++, p++)
    353 		while (*++p);
    354 
    355 	autostart_pids = malloc(autostart_len * sizeof(pid_t));
    356 	for (p = autostart; *p; i++, p++) {
    357 		if ((autostart_pids[i] = fork()) == 0) {
    358 			setsid();
    359 			execvp(*p, (char *const *)p);
    360 			fprintf(stderr, "dwm: execvp %s\n", *p);
    361 			perror(" failed");
    362 			_exit(EXIT_FAILURE);
    363 		}
    364 		/* skip arguments */
    365 		while (*++p);
    366 	}
    367 }
    368 
    369 /* function implementations */
    370 void
    371 applyrules(Client *c)
    372 {
    373 	const char *class, *instance;
    374 	unsigned int i;
    375 	const Rule *r;
    376 	Monitor *m;
    377 	XClassHint ch = { NULL, NULL };
    378 
    379 	/* rule matching */
    380 	c->isfloating = 0;
    381 	c->tags = 0;
    382 	XGetClassHint(dpy, c->win, &ch);
    383 	class    = ch.res_class ? ch.res_class : broken;
    384 	instance = ch.res_name  ? ch.res_name  : broken;
    385 
    386 	for (i = 0; i < LENGTH(rules); i++) {
    387 		r = &rules[i];
    388 		if ((!r->title || strstr(c->name, r->title))
    389 		&& (!r->class || strstr(class, r->class))
    390 		&& (!r->instance || strstr(instance, r->instance)))
    391 		{
    392 			c->isterminal = r->isterminal;
    393 			c->noswallow  = r->noswallow;
    394 			c->isfloating = r->isfloating;
    395 			c->tags |= r->tags;
    396 			for (m = mons; m && m->num != r->monitor; m = m->next);
    397 			if (m)
    398 				c->mon = m;
    399 		}
    400 	}
    401 	if (ch.res_class)
    402 		XFree(ch.res_class);
    403 	if (ch.res_name)
    404 		XFree(ch.res_name);
    405 	c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
    406 }
    407 
    408 int
    409 applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact)
    410 {
    411 	int baseismin;
    412 	Monitor *m = c->mon;
    413 
    414 	/* set minimum possible */
    415 	*w = MAX(1, *w);
    416 	*h = MAX(1, *h);
    417 	if (interact) {
    418 		if (*x > sw)
    419 			*x = sw - WIDTH(c);
    420 		if (*y > sh)
    421 			*y = sh - HEIGHT(c);
    422 		if (*x + *w + 2 * c->bw < 0)
    423 			*x = 0;
    424 		if (*y + *h + 2 * c->bw < 0)
    425 			*y = 0;
    426 	} else {
    427 		if (*x >= m->wx + m->ww)
    428 			*x = m->wx + m->ww - WIDTH(c);
    429 		if (*y >= m->wy + m->wh)
    430 			*y = m->wy + m->wh - HEIGHT(c);
    431 		if (*x + *w + 2 * c->bw <= m->wx)
    432 			*x = m->wx;
    433 		if (*y + *h + 2 * c->bw <= m->wy)
    434 			*y = m->wy;
    435 	}
    436 	if (*h < bh)
    437 		*h = bh;
    438 	if (*w < bh)
    439 		*w = bh;
    440 	if (resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
    441 		/* see last two sentences in ICCCM 4.1.2.3 */
    442 		baseismin = c->basew == c->minw && c->baseh == c->minh;
    443 		if (!baseismin) { /* temporarily remove base dimensions */
    444 			*w -= c->basew;
    445 			*h -= c->baseh;
    446 		}
    447 		/* adjust for aspect limits */
    448 		if (c->mina > 0 && c->maxa > 0) {
    449 			if (c->maxa < (float)*w / *h)
    450 				*w = *h * c->maxa + 0.5;
    451 			else if (c->mina < (float)*h / *w)
    452 				*h = *w * c->mina + 0.5;
    453 		}
    454 		if (baseismin) { /* increment calculation requires this */
    455 			*w -= c->basew;
    456 			*h -= c->baseh;
    457 		}
    458 		/* adjust for increment value */
    459 		if (c->incw)
    460 			*w -= *w % c->incw;
    461 		if (c->inch)
    462 			*h -= *h % c->inch;
    463 		/* restore base dimensions */
    464 		*w = MAX(*w + c->basew, c->minw);
    465 		*h = MAX(*h + c->baseh, c->minh);
    466 		if (c->maxw)
    467 			*w = MIN(*w, c->maxw);
    468 		if (c->maxh)
    469 			*h = MIN(*h, c->maxh);
    470 	}
    471 	return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
    472 }
    473 
    474 void
    475 arrange(Monitor *m)
    476 {
    477 	if (m)
    478 		showhide(m->stack);
    479 	else for (m = mons; m; m = m->next)
    480 		showhide(m->stack);
    481 	if (m) {
    482 		arrangemon(m);
    483 		restack(m);
    484 	} else for (m = mons; m; m = m->next)
    485 		arrangemon(m);
    486 }
    487 
    488 void
    489 arrangemon(Monitor *m)
    490 {
    491 	strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
    492 	if (m->lt[m->sellt]->arrange)
    493 		m->lt[m->sellt]->arrange(m);
    494 }
    495 
    496 void
    497 attach(Client *c)
    498 {
    499 	c->next = c->mon->clients;
    500 	c->mon->clients = c;
    501 }
    502 
    503 void
    504 attachstack(Client *c)
    505 {
    506 	c->snext = c->mon->stack;
    507 	c->mon->stack = c;
    508 }
    509 
    510 void
    511 swallow(Client *p, Client *c)
    512 {
    513 
    514 	if (c->noswallow || c->isterminal)
    515 		return;
    516 	if (c->noswallow && !swallowfloating && c->isfloating)
    517 		return;
    518 
    519 	detach(c);
    520 	detachstack(c);
    521 
    522 	setclientstate(c, WithdrawnState);
    523 	XUnmapWindow(dpy, p->win);
    524 
    525 	p->swallowing = c;
    526 	c->mon = p->mon;
    527 
    528 	Window w = p->win;
    529 	p->win = c->win;
    530 	c->win = w;
    531 	updatetitle(p);
    532 	XMoveResizeWindow(dpy, p->win, p->x, p->y, p->w, p->h);
    533 	arrange(p->mon);
    534 	configure(p);
    535 	updateclientlist();
    536 }
    537 
    538 void
    539 unswallow(Client *c)
    540 {
    541 	c->win = c->swallowing->win;
    542 
    543 	free(c->swallowing);
    544 	c->swallowing = NULL;
    545 
    546 	/* unfullscreen the client */
    547 	setfullscreen(c, 0);
    548 	updatetitle(c);
    549 	arrange(c->mon);
    550 	XMapWindow(dpy, c->win);
    551 	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
    552 	setclientstate(c, NormalState);
    553 	focus(NULL);
    554 	arrange(c->mon);
    555 }
    556 
    557 void
    558 buttonpress(XEvent *e)
    559 {
    560 	unsigned int i, x, click, occ = 0;
    561 	Arg arg = {0};
    562 	Client *c;
    563 	Monitor *m;
    564 	XButtonPressedEvent *ev = &e->xbutton;
    565 	char *text, *s, ch;
    566 
    567 	click = ClkRootWin;
    568 	/* focus monitor if necessary */
    569 	if ((m = wintomon(ev->window)) && m != selmon) {
    570 		unfocus(selmon->sel, 1);
    571 		selmon = m;
    572 		focus(NULL);
    573 	}
    574 	if (ev->window == selmon->barwin) {
    575 		i = x = 0;
    576 		for (c = m->clients; c; c = c->next)
    577 			occ |= c->tags == 255 ? 0 : c->tags;
    578 		do {
    579 			/* do not reserve space for vacant tags */
    580 			if (!(occ & 1 << i || m->tagset[m->seltags] & 1 << i))
    581 				continue;
    582 			x += TEXTW(tags[i]);
    583 		} while (ev->x >= x && ++i < LENGTH(tags));
    584 		if (i < LENGTH(tags)) {
    585 			click = ClkTagBar;
    586 			arg.ui = 1 << i;
    587 		} else if (ev->x < x + blw)
    588 			click = ClkLtSymbol;
    589 		else if (ev->x > selmon->ww - statusw) {
    590 			x = selmon->ww - statusw;
    591             click = ClkStatusText;
    592 			statussig = 0;
    593 			for (text = s = stext; *s && x <= ev->x; s++) {
    594 				if ((unsigned char)(*s) < ' ') {
    595 					ch = *s;
    596 					*s = '\0';
    597 					x += TEXTW(text) - lrpad;
    598 					*s = ch;
    599 					text = s + 1;
    600 					if (x >= ev->x)
    601 						break;
    602 					statussig = ch;
    603 				}
    604 			}
    605 		}
    606 	} else if ((c = wintoclient(ev->window))) {
    607 		focus(c);
    608 		restack(selmon);
    609 		XAllowEvents(dpy, ReplayPointer, CurrentTime);
    610 		click = ClkClientWin;
    611 	}
    612 	for (i = 0; i < LENGTH(buttons); i++)
    613 		if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
    614 		&& CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
    615 			buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
    616 }
    617 
    618 void
    619 checkotherwm(void)
    620 {
    621 	xerrorxlib = XSetErrorHandler(xerrorstart);
    622 	/* this causes an error if some other window manager is running */
    623 	XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
    624 	XSync(dpy, False);
    625 	XSetErrorHandler(xerror);
    626 	XSync(dpy, False);
    627 }
    628 
    629 void
    630 cleanup(void)
    631 {
    632 	Arg a = {.ui = ~0};
    633 	Layout foo = { "", NULL };
    634 	Monitor *m;
    635 	size_t i;
    636 
    637 	view(&a);
    638 	selmon->lt[selmon->sellt] = &foo;
    639 	for (m = mons; m; m = m->next)
    640 		while (m->stack)
    641 			unmanage(m->stack, 0);
    642 	XUngrabKey(dpy, AnyKey, AnyModifier, root);
    643 	while (mons)
    644 		cleanupmon(mons);
    645 	for (i = 0; i < CurLast; i++)
    646 		drw_cur_free(drw, cursor[i]);
    647 	for (i = 0; i < LENGTH(colors); i++)
    648 		free(scheme[i]);
    649 	XDestroyWindow(dpy, wmcheckwin);
    650 	drw_free(drw);
    651 	XSync(dpy, False);
    652 	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
    653 	XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
    654 }
    655 
    656 void
    657 cleanupmon(Monitor *mon)
    658 {
    659 	Monitor *m;
    660 
    661 	if (mon == mons)
    662 		mons = mons->next;
    663 	else {
    664 		for (m = mons; m && m->next != mon; m = m->next);
    665 		m->next = mon->next;
    666 	}
    667 	XUnmapWindow(dpy, mon->barwin);
    668 	XDestroyWindow(dpy, mon->barwin);
    669 	free(mon);
    670 }
    671 
    672 void
    673 clientmessage(XEvent *e)
    674 {
    675 	XClientMessageEvent *cme = &e->xclient;
    676 	Client *c = wintoclient(cme->window);
    677 
    678 	if (!c)
    679 		return;
    680 	if (cme->message_type == netatom[NetWMState]) {
    681 		if (cme->data.l[1] == netatom[NetWMFullscreen]
    682 		|| cme->data.l[2] == netatom[NetWMFullscreen])
    683 			setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
    684 				|| (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
    685 	} else if (cme->message_type == netatom[NetActiveWindow]) {
    686 		if (c != selmon->sel && !c->isurgent)
    687 			seturgent(c, 1);
    688 	}
    689 }
    690 
    691 void
    692 configure(Client *c)
    693 {
    694 	XConfigureEvent ce;
    695 
    696 	ce.type = ConfigureNotify;
    697 	ce.display = dpy;
    698 	ce.event = c->win;
    699 	ce.window = c->win;
    700 	ce.x = c->x;
    701 	ce.y = c->y;
    702 	ce.width = c->w;
    703 	ce.height = c->h;
    704 	ce.border_width = c->bw;
    705 	ce.above = None;
    706 	ce.override_redirect = False;
    707 	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
    708 }
    709 
    710 void
    711 configurenotify(XEvent *e)
    712 {
    713 	Monitor *m;
    714 	Client *c;
    715 	XConfigureEvent *ev = &e->xconfigure;
    716 	int dirty;
    717 
    718 	/* TODO: updategeom handling sucks, needs to be simplified */
    719 	if (ev->window == root) {
    720 		dirty = (sw != ev->width || sh != ev->height);
    721 		sw = ev->width;
    722 		sh = ev->height;
    723 		if (updategeom() || dirty) {
    724 			drw_resize(drw, sw, bh);
    725 			updatebars();
    726 			for (m = mons; m; m = m->next) {
    727 				for (c = m->clients; c; c = c->next)
    728 					if (c->isfullscreen)
    729 						resizeclient(c, m->mx, m->my, m->mw, m->mh);
    730 				XMoveResizeWindow(dpy, m->barwin, m->wx + sp, m->by + vp, m->ww -  2 * sp, bh);
    731 			}
    732 			focus(NULL);
    733 			arrange(NULL);
    734 		}
    735 	}
    736 }
    737 
    738 void
    739 configurerequest(XEvent *e)
    740 {
    741 	Client *c;
    742 	Monitor *m;
    743 	XConfigureRequestEvent *ev = &e->xconfigurerequest;
    744 	XWindowChanges wc;
    745 
    746 	if ((c = wintoclient(ev->window))) {
    747 		if (ev->value_mask & CWBorderWidth)
    748 			c->bw = ev->border_width;
    749 		else if (c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
    750 			m = c->mon;
    751 			if (ev->value_mask & CWX) {
    752 				c->oldx = c->x;
    753 				c->x = m->mx + ev->x;
    754 			}
    755 			if (ev->value_mask & CWY) {
    756 				c->oldy = c->y;
    757 				c->y = m->my + ev->y;
    758 			}
    759 			if (ev->value_mask & CWWidth) {
    760 				c->oldw = c->w;
    761 				c->w = ev->width;
    762 			}
    763 			if (ev->value_mask & CWHeight) {
    764 				c->oldh = c->h;
    765 				c->h = ev->height;
    766 			}
    767 			if ((c->x + c->w) > m->mx + m->mw && c->isfloating)
    768 				c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
    769 			if ((c->y + c->h) > m->my + m->mh && c->isfloating)
    770 				c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
    771 			if ((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
    772 				configure(c);
    773 			if (ISVISIBLE(c))
    774 				XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
    775 		} else
    776 			configure(c);
    777 	} else {
    778 		wc.x = ev->x;
    779 		wc.y = ev->y;
    780 		wc.width = ev->width;
    781 		wc.height = ev->height;
    782 		wc.border_width = ev->border_width;
    783 		wc.sibling = ev->above;
    784 		wc.stack_mode = ev->detail;
    785 		XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
    786 	}
    787 	XSync(dpy, False);
    788 }
    789 
    790 Monitor *
    791 createmon(void)
    792 {
    793 	Monitor *m;
    794 
    795 	m = ecalloc(1, sizeof(Monitor));
    796 	m->tagset[0] = m->tagset[1] = 1;
    797 	m->mfact = mfact;
    798 	m->nmaster = nmaster;
    799 	m->showbar = showbar;
    800 	m->topbar = topbar;
    801 	m->gappih = gappih;
    802 	m->gappiv = gappiv;
    803 	m->gappoh = gappoh;
    804 	m->gappov = gappov;
    805 	m->lt[0] = &layouts[0];
    806 	m->lt[1] = &layouts[1 % LENGTH(layouts)];
    807 	strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
    808 	return m;
    809 }
    810 
    811 void
    812 destroynotify(XEvent *e)
    813 {
    814 	Client *c;
    815 	XDestroyWindowEvent *ev = &e->xdestroywindow;
    816 
    817 	if ((c = wintoclient(ev->window)))
    818 		unmanage(c, 1);
    819 
    820 	else if ((c = swallowingclient(ev->window)))
    821 		unmanage(c->swallowing, 1);
    822 }
    823 
    824 void
    825 detach(Client *c)
    826 {
    827 	Client **tc;
    828 
    829 	for (tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
    830 	*tc = c->next;
    831 }
    832 
    833 void
    834 detachstack(Client *c)
    835 {
    836 	Client **tc, *t;
    837 
    838 	for (tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
    839 	*tc = c->snext;
    840 
    841 	if (c == c->mon->sel) {
    842 		for (t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
    843 		c->mon->sel = t;
    844 	}
    845 }
    846 
    847 Monitor *
    848 dirtomon(int dir)
    849 {
    850 	Monitor *m = NULL;
    851 
    852 	if (dir > 0) {
    853 		if (!(m = selmon->next))
    854 			m = mons;
    855 	} else if (selmon == mons)
    856 		for (m = mons; m->next; m = m->next);
    857 	else
    858 		for (m = mons; m->next != selmon; m = m->next);
    859 	return m;
    860 }
    861 
    862 void
    863 drawbar(Monitor *m)
    864 {
    865 	int x, w, tw = 0;
    866 	int boxs = drw->fonts->h / 9;
    867 	int boxw = drw->fonts->h / 6 + 2;
    868 	unsigned int i, occ = 0, urg = 0;
    869 	Client *c;
    870 
    871 	/* draw status first so it can be overdrawn by tags later */
    872 	if (m == selmon) { /* status is only drawn on selected monitor */
    873 		char *text, *s, ch;
    874 		drw_setscheme(drw, scheme[SchemeNorm]);
    875 
    876 		x = 0;
    877 		for (text = s = stext; *s; s++) {
    878 			if ((unsigned char)(*s) < ' ') {
    879 				ch = *s;
    880 				*s = '\0';
    881 				tw = TEXTW(text) - lrpad;
    882 				drw_text(drw, m->ww - statusw + x, 0, tw, bh, 0, text, 0);
    883 				x += tw;
    884 				*s = ch;
    885 				text = s + 1;
    886 			}
    887 		}
    888 		tw = TEXTW(text) - lrpad + 2;
    889 		drw_text(drw, m->ww - statusw + x, 0, tw, bh, 0, text, 0);
    890 		tw = statusw;
    891 	}
    892 
    893 	for (c = m->clients; c; c = c->next) {
    894 		occ |= c->tags == 255 ? 0 : c->tags;
    895 		if (c->isurgent)
    896 			urg |= c->tags;
    897 	}
    898 	x = 0;
    899 	for (i = 0; i < LENGTH(tags); i++) {
    900 		/* do not draw vacant tags */
    901 		if (!(occ & 1 << i || m->tagset[m->seltags] & 1 << i))
    902 		continue;
    903 
    904 		w = TEXTW(tags[i]);
    905 		drw_setscheme(drw, scheme[m->tagset[m->seltags] & 1 << i ? SchemeSel : SchemeNorm]);
    906 		drw_text(drw, x, 0, w, bh, lrpad / 2, tags[i], urg & 1 << i);
    907 		if (ulineall || m->tagset[m->seltags] & 1 << i) /* if there are conflicts, just move these lines directly underneath both 'drw_setscheme' and 'drw_text' :) */
    908 			drw_rect(drw, x + ulinepad, bh - ulinestroke - ulinevoffset, w - (ulinepad * 2), ulinestroke, 1, 0);
    909 		if (occ & 1 << i)
    910 			drw_rect(drw, x + boxs, boxs, boxw, boxw,
    911 				m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
    912 				urg & 1 << i);
    913 		x += w;
    914 	}
    915 	w = blw = TEXTW(m->ltsymbol);
    916 	drw_setscheme(drw, scheme[SchemeNorm]);
    917 	x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
    918 
    919 	if ((w = m->ww - tw - x) > bh) {
    920 			drw_setscheme(drw, scheme[SchemeNorm]);
    921 			drw_rect(drw, x, 0, w - 2 * sp, bh, 1, 1);
    922 	}
    923 	drw_map(drw, m->barwin, 0, 0, m->ww, bh);
    924 }
    925 
    926 void
    927 drawbars(void)
    928 {
    929 	Monitor *m;
    930 
    931 	for (m = mons; m; m = m->next)
    932 		drawbar(m);
    933 }
    934 
    935 void
    936 enternotify(XEvent *e)
    937 {
    938 	Client *c;
    939 	Monitor *m;
    940 	XCrossingEvent *ev = &e->xcrossing;
    941 
    942 	if ((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
    943 		return;
    944 	c = wintoclient(ev->window);
    945 	m = c ? c->mon : wintomon(ev->window);
    946 	if (m != selmon) {
    947 		unfocus(selmon->sel, 1);
    948 		selmon = m;
    949 	} else if (!c || c == selmon->sel)
    950 		return;
    951 	focus(c);
    952 }
    953 
    954 void
    955 expose(XEvent *e)
    956 {
    957 	Monitor *m;
    958 	XExposeEvent *ev = &e->xexpose;
    959 
    960 	if (ev->count == 0 && (m = wintomon(ev->window)))
    961 		drawbar(m);
    962 }
    963 
    964 void
    965 focus(Client *c)
    966 {
    967 	if (!c || !ISVISIBLE(c))
    968 		for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
    969 	if (selmon->sel && selmon->sel != c)
    970 		unfocus(selmon->sel, 0);
    971 	if (c) {
    972 		if (c->mon != selmon)
    973 			selmon = c->mon;
    974 		if (c->isurgent)
    975 			seturgent(c, 0);
    976 		detachstack(c);
    977 		attachstack(c);
    978 		grabbuttons(c, 1);
    979 		XSetWindowBorder(dpy, c->win, scheme[SchemeSel][ColBorder].pixel);
    980 		setfocus(c);
    981 	} else {
    982 		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
    983 		XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
    984 	}
    985 	selmon->sel = c;
    986 	drawbars();
    987 }
    988 
    989 /* there are some broken focus acquiring clients needing extra handling */
    990 void
    991 focusin(XEvent *e)
    992 {
    993 	XFocusChangeEvent *ev = &e->xfocus;
    994 
    995 	if (selmon->sel && ev->window != selmon->sel->win)
    996 		setfocus(selmon->sel);
    997 }
    998 
    999 void
   1000 focusmon(const Arg *arg)
   1001 {
   1002 	Monitor *m;
   1003 
   1004 	if (!mons->next)
   1005 		return;
   1006 	if ((m = dirtomon(arg->i)) == selmon)
   1007 		return;
   1008 	unfocus(selmon->sel, 0);
   1009 	selmon = m;
   1010 	focus(NULL);
   1011 }
   1012 
   1013 void
   1014 focusstack(const Arg *arg)
   1015 {
   1016 	Client *c = NULL, *i;
   1017 
   1018 	if (!selmon->sel || selmon->sel->isfullscreen)
   1019 		return;
   1020 	if (arg->i > 0) {
   1021 		for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
   1022 		if (!c)
   1023 			for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
   1024 	} else {
   1025 		for (i = selmon->clients; i != selmon->sel; i = i->next)
   1026 			if (ISVISIBLE(i))
   1027 				c = i;
   1028 		if (!c)
   1029 			for (; i; i = i->next)
   1030 				if (ISVISIBLE(i))
   1031 					c = i;
   1032 	}
   1033 	if (c) {
   1034 		focus(c);
   1035 		restack(selmon);
   1036 	}
   1037 }
   1038 
   1039 Atom
   1040 getatomprop(Client *c, Atom prop)
   1041 {
   1042 	int di;
   1043 	unsigned long dl;
   1044 	unsigned char *p = NULL;
   1045 	Atom da, atom = None;
   1046 
   1047 	if (XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
   1048 		&da, &di, &dl, &dl, &p) == Success && p) {
   1049 		atom = *(Atom *)p;
   1050 		XFree(p);
   1051 	}
   1052 	return atom;
   1053 }
   1054 
   1055 pid_t
   1056 getstatusbarpid()
   1057 {
   1058 	char buf[32], *str = buf, *c;
   1059 	FILE *fp;
   1060 
   1061 	if (statuspid > 0) {
   1062 		snprintf(buf, sizeof(buf), "/proc/%u/cmdline", statuspid);
   1063 		if ((fp = fopen(buf, "r"))) {
   1064 			fgets(buf, sizeof(buf), fp);
   1065 			while ((c = strchr(str, '/')))
   1066 				str = c + 1;
   1067 			fclose(fp);
   1068 			if (!strcmp(str, STATUSBAR))
   1069 				return statuspid;
   1070 		}
   1071 	}
   1072 	if (!(fp = popen("pidof -s "STATUSBAR, "r")))
   1073 		return -1;
   1074 	fgets(buf, sizeof(buf), fp);
   1075 	pclose(fp);
   1076 	return strtol(buf, NULL, 10);
   1077 }
   1078 
   1079 int
   1080 getrootptr(int *x, int *y)
   1081 {
   1082 	int di;
   1083 	unsigned int dui;
   1084 	Window dummy;
   1085 
   1086 	return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
   1087 }
   1088 
   1089 long
   1090 getstate(Window w)
   1091 {
   1092 	int format;
   1093 	long result = -1;
   1094 	unsigned char *p = NULL;
   1095 	unsigned long n, extra;
   1096 	Atom real;
   1097 
   1098 	if (XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
   1099 		&real, &format, &n, &extra, (unsigned char **)&p) != Success)
   1100 		return -1;
   1101 	if (n != 0)
   1102 		result = *p;
   1103 	XFree(p);
   1104 	return result;
   1105 }
   1106 
   1107 int
   1108 gettextprop(Window w, Atom atom, char *text, unsigned int size)
   1109 {
   1110 	char **list = NULL;
   1111 	int n;
   1112 	XTextProperty name;
   1113 
   1114 	if (!text || size == 0)
   1115 		return 0;
   1116 	text[0] = '\0';
   1117 	if (!XGetTextProperty(dpy, w, &name, atom) || !name.nitems)
   1118 		return 0;
   1119 	if (name.encoding == XA_STRING)
   1120 		strncpy(text, (char *)name.value, size - 1);
   1121 	else {
   1122 		if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
   1123 			strncpy(text, *list, size - 1);
   1124 			XFreeStringList(list);
   1125 		}
   1126 	}
   1127 	text[size - 1] = '\0';
   1128 	XFree(name.value);
   1129 	return 1;
   1130 }
   1131 
   1132 void
   1133 grabbuttons(Client *c, int focused)
   1134 {
   1135 	updatenumlockmask();
   1136 	{
   1137 		unsigned int i, j;
   1138 		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
   1139 		XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
   1140 		if (!focused)
   1141 			XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
   1142 				BUTTONMASK, GrabModeSync, GrabModeSync, None, None);
   1143 		for (i = 0; i < LENGTH(buttons); i++)
   1144 			if (buttons[i].click == ClkClientWin)
   1145 				for (j = 0; j < LENGTH(modifiers); j++)
   1146 					XGrabButton(dpy, buttons[i].button,
   1147 						buttons[i].mask | modifiers[j],
   1148 						c->win, False, BUTTONMASK,
   1149 						GrabModeAsync, GrabModeSync, None, None);
   1150 	}
   1151 }
   1152 
   1153 void
   1154 grabkeys(void)
   1155 {
   1156 	updatenumlockmask();
   1157 	{
   1158 		unsigned int i, j;
   1159 		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
   1160 		KeyCode code;
   1161 
   1162 		XUngrabKey(dpy, AnyKey, AnyModifier, root);
   1163 		for (i = 0; i < LENGTH(keys); i++)
   1164 			if ((code = XKeysymToKeycode(dpy, keys[i].keysym)))
   1165 				for (j = 0; j < LENGTH(modifiers); j++)
   1166 					XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
   1167 						True, GrabModeAsync, GrabModeAsync);
   1168 	}
   1169 }
   1170 
   1171 void
   1172 incnmaster(const Arg *arg)
   1173 {
   1174 	selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
   1175 	arrange(selmon);
   1176 }
   1177 
   1178 #ifdef XINERAMA
   1179 static int
   1180 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info)
   1181 {
   1182 	while (n--)
   1183 		if (unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
   1184 		&& unique[n].width == info->width && unique[n].height == info->height)
   1185 			return 0;
   1186 	return 1;
   1187 }
   1188 #endif /* XINERAMA */
   1189 
   1190 void
   1191 keypress(XEvent *e)
   1192 {
   1193 	unsigned int i;
   1194 	KeySym keysym;
   1195 	XKeyEvent *ev;
   1196 
   1197 	ev = &e->xkey;
   1198 	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
   1199 	for (i = 0; i < LENGTH(keys); i++)
   1200 		if (keysym == keys[i].keysym
   1201 		&& CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
   1202 		&& keys[i].func)
   1203 			keys[i].func(&(keys[i].arg));
   1204 }
   1205 
   1206 int
   1207 fake_signal(void)
   1208 {
   1209     char fsignal[256];
   1210     char indicator[9] = "fsignal:";
   1211     char str_sig[50];
   1212     char param[16];
   1213     int i, len_str_sig, n, paramn;
   1214     size_t len_fsignal, len_indicator = strlen(indicator);
   1215     Arg arg;
   1216 
   1217     // Get root name property
   1218     if (gettextprop(root, XA_WM_NAME, fsignal, sizeof(fsignal))) {
   1219         len_fsignal = strlen(fsignal);
   1220 
   1221         // Check if this is indeed a fake signal
   1222         if (len_indicator > len_fsignal ? 0 : strncmp(indicator, fsignal, len_indicator) == 0) {
   1223             paramn = sscanf(fsignal+len_indicator, "%s%n%s%n", str_sig, &len_str_sig, param, &n);
   1224 
   1225             if (paramn == 1) arg = (Arg) {0};
   1226             else if (paramn > 2) return 1;
   1227             else if (strncmp(param, "i", n - len_str_sig) == 0)
   1228                         sscanf(fsignal + len_indicator + n, "%i", &(arg.i));
   1229             else if (strncmp(param, "ui", n - len_str_sig) == 0)
   1230                         sscanf(fsignal + len_indicator + n, "%u", &(arg.ui));
   1231             else if (strncmp(param, "f", n - len_str_sig) == 0)
   1232                         sscanf(fsignal + len_indicator + n, "%f", &(arg.f));
   1233             else return 1;
   1234 
   1235             // Check if a signal was found, and if so handle it
   1236             for (i = 0; i < LENGTH(signals); i++)
   1237                 if (strncmp(str_sig, signals[i].sig, len_str_sig) == 0 && signals[i].func)
   1238                     signals[i].func(&(arg));
   1239 
   1240             // A fake signal was sent
   1241             return 1;
   1242         }
   1243     }
   1244 
   1245     // No fake signal was sent, so proceed with update
   1246     return 0;
   1247 }
   1248 
   1249 void
   1250 killclient(const Arg *arg)
   1251 {
   1252 	if (!selmon->sel)
   1253 		return;
   1254 	if (!sendevent(selmon->sel, wmatom[WMDelete])) {
   1255 		XGrabServer(dpy);
   1256 		XSetErrorHandler(xerrordummy);
   1257 		XSetCloseDownMode(dpy, DestroyAll);
   1258 		XKillClient(dpy, selmon->sel->win);
   1259 		XSync(dpy, False);
   1260 		XSetErrorHandler(xerror);
   1261 		XUngrabServer(dpy);
   1262 	}
   1263 }
   1264 
   1265 void
   1266 manage(Window w, XWindowAttributes *wa)
   1267 {
   1268 	Client *c, *t = NULL, *term = NULL;
   1269 	Window trans = None;
   1270 	XWindowChanges wc;
   1271 
   1272 	c = ecalloc(1, sizeof(Client));
   1273 	c->win = w;
   1274 	c->pid = winpid(w);
   1275 	/* geometry */
   1276 	c->x = c->oldx = wa->x;
   1277 	c->y = c->oldy = wa->y;
   1278 	c->w = c->oldw = wa->width;
   1279 	c->h = c->oldh = wa->height;
   1280 	c->oldbw = wa->border_width;
   1281 
   1282 	updatetitle(c);
   1283 	if (XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
   1284 		c->mon = t->mon;
   1285 		c->tags = t->tags;
   1286 	} else {
   1287 		c->mon = selmon;
   1288 		applyrules(c);
   1289 		term = termforwin(c);
   1290 	}
   1291 
   1292 	if (c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
   1293 		c->x = c->mon->mx + c->mon->mw - WIDTH(c);
   1294 	if (c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
   1295 		c->y = c->mon->my + c->mon->mh - HEIGHT(c);
   1296 	c->x = MAX(c->x, c->mon->mx);
   1297 	/* only fix client y-offset, if the client center might cover the bar */
   1298 	c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
   1299 		&& (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
   1300 	c->bw = borderpx;
   1301 
   1302 	wc.border_width = c->bw;
   1303 	XConfigureWindow(dpy, w, CWBorderWidth, &wc);
   1304 	XSetWindowBorder(dpy, w, scheme[SchemeNorm][ColBorder].pixel);
   1305 	configure(c); /* propagates border_width, if size doesn't change */
   1306 	updatewindowtype(c);
   1307 	updatesizehints(c);
   1308 	updatewmhints(c);
   1309 	XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
   1310 	grabbuttons(c, 0);
   1311 	if (!c->isfloating)
   1312 		c->isfloating = c->oldstate = trans != None || c->isfixed;
   1313 	if (c->isfloating)
   1314 		XRaiseWindow(dpy, c->win);
   1315 	attach(c);
   1316 	attachstack(c);
   1317 	XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
   1318 		(unsigned char *) &(c->win), 1);
   1319 	XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
   1320 	setclientstate(c, NormalState);
   1321 	if (c->mon == selmon)
   1322 		unfocus(selmon->sel, 0);
   1323 	c->mon->sel = c;
   1324 	arrange(c->mon);
   1325 	XMapWindow(dpy, c->win);
   1326 	if (term)
   1327 		swallow(term, c);
   1328 	focus(NULL);
   1329 }
   1330 
   1331 void
   1332 mappingnotify(XEvent *e)
   1333 {
   1334 	XMappingEvent *ev = &e->xmapping;
   1335 
   1336 	XRefreshKeyboardMapping(ev);
   1337 	if (ev->request == MappingKeyboard)
   1338 		grabkeys();
   1339 }
   1340 
   1341 void
   1342 maprequest(XEvent *e)
   1343 {
   1344 	static XWindowAttributes wa;
   1345 	XMapRequestEvent *ev = &e->xmaprequest;
   1346 
   1347 	if (!XGetWindowAttributes(dpy, ev->window, &wa))
   1348 		return;
   1349 	if (wa.override_redirect)
   1350 		return;
   1351 	if (!wintoclient(ev->window))
   1352 		manage(ev->window, &wa);
   1353 }
   1354 
   1355 void
   1356 monocle(Monitor *m)
   1357 {
   1358 	unsigned int n = 0;
   1359 	Client *c;
   1360 
   1361 	for (c = m->clients; c; c = c->next)
   1362 		if (ISVISIBLE(c))
   1363 			n++;
   1364 	if (n > 0) /* override layout symbol */
   1365 		snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
   1366 	for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
   1367 		resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
   1368 }
   1369 
   1370 void
   1371 motionnotify(XEvent *e)
   1372 {
   1373 	static Monitor *mon = NULL;
   1374 	Monitor *m;
   1375 	XMotionEvent *ev = &e->xmotion;
   1376 
   1377 	if (ev->window != root)
   1378 		return;
   1379 	if ((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
   1380 		unfocus(selmon->sel, 1);
   1381 		selmon = m;
   1382 		focus(NULL);
   1383 	}
   1384 	mon = m;
   1385 }
   1386 
   1387 void
   1388 movemouse(const Arg *arg)
   1389 {
   1390 	int x, y, ocx, ocy, nx, ny;
   1391 	Client *c;
   1392 	Monitor *m;
   1393 	XEvent ev;
   1394 	Time lasttime = 0;
   1395 
   1396 	if (!(c = selmon->sel))
   1397 		return;
   1398 	if (c->isfullscreen) /* no support moving fullscreen windows by mouse */
   1399 		return;
   1400 	restack(selmon);
   1401 	ocx = c->x;
   1402 	ocy = c->y;
   1403 	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
   1404 		None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
   1405 		return;
   1406 	if (!getrootptr(&x, &y))
   1407 		return;
   1408 	do {
   1409 		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
   1410 		switch(ev.type) {
   1411 		case ConfigureRequest:
   1412 		case Expose:
   1413 		case MapRequest:
   1414 			handler[ev.type](&ev);
   1415 			break;
   1416 		case MotionNotify:
   1417 			if ((ev.xmotion.time - lasttime) <= (1000 / 60))
   1418 				continue;
   1419 			lasttime = ev.xmotion.time;
   1420 
   1421 			nx = ocx + (ev.xmotion.x - x);
   1422 			ny = ocy + (ev.xmotion.y - y);
   1423 			if (abs(selmon->wx - nx) < snap)
   1424 				nx = selmon->wx;
   1425 			else if (abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
   1426 				nx = selmon->wx + selmon->ww - WIDTH(c);
   1427 			if (abs(selmon->wy - ny) < snap)
   1428 				ny = selmon->wy;
   1429 			else if (abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
   1430 				ny = selmon->wy + selmon->wh - HEIGHT(c);
   1431 			if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
   1432 			&& (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
   1433 				togglefloating(NULL);
   1434 			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
   1435 				resize(c, nx, ny, c->w, c->h, 1);
   1436 			break;
   1437 		}
   1438 	} while (ev.type != ButtonRelease);
   1439 	XUngrabPointer(dpy, CurrentTime);
   1440 	if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
   1441 		sendmon(c, m);
   1442 		selmon = m;
   1443 		focus(NULL);
   1444 	}
   1445 }
   1446 
   1447 Client *
   1448 nexttiled(Client *c)
   1449 {
   1450 	for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
   1451 	return c;
   1452 }
   1453 
   1454 void
   1455 pop(Client *c)
   1456 {
   1457 	detach(c);
   1458 	attach(c);
   1459 	focus(c);
   1460 	arrange(c->mon);
   1461 }
   1462 
   1463 void
   1464 propertynotify(XEvent *e)
   1465 {
   1466 	Client *c;
   1467 	Window trans;
   1468 	XPropertyEvent *ev = &e->xproperty;
   1469 
   1470     if ((ev->window == root) && (ev->atom == XA_WM_NAME)) {
   1471         if (!fake_signal())
   1472             updatestatus();
   1473     }
   1474 	else if (ev->state == PropertyDelete)
   1475 		return; /* ignore */
   1476 	else if ((c = wintoclient(ev->window))) {
   1477 		switch(ev->atom) {
   1478 		default: break;
   1479 		case XA_WM_TRANSIENT_FOR:
   1480 			if (!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
   1481 				(c->isfloating = (wintoclient(trans)) != NULL))
   1482 				arrange(c->mon);
   1483 			break;
   1484 		case XA_WM_NORMAL_HINTS:
   1485 			updatesizehints(c);
   1486 			break;
   1487 		case XA_WM_HINTS:
   1488 			updatewmhints(c);
   1489 			drawbars();
   1490 			break;
   1491 		}
   1492 		if (ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName])
   1493 			updatetitle(c);
   1494 		if (ev->atom == netatom[NetWMWindowType])
   1495 			updatewindowtype(c);
   1496 	}
   1497 }
   1498 
   1499 void
   1500 quit(const Arg *arg)
   1501 {
   1502     size_t i;
   1503 
   1504 	/* kill child processes */
   1505 	for (i = 0; i < autostart_len; i++) {
   1506 		if (0 < autostart_pids[i]) {
   1507 			kill(autostart_pids[i], SIGTERM);
   1508 			waitpid(autostart_pids[i], NULL, 0);
   1509 		}
   1510 	}
   1511 
   1512     if(arg->i) restart = 1;
   1513 	running = 0;
   1514 }
   1515 
   1516 Monitor *
   1517 recttomon(int x, int y, int w, int h)
   1518 {
   1519 	Monitor *m, *r = selmon;
   1520 	int a, area = 0;
   1521 
   1522 	for (m = mons; m; m = m->next)
   1523 		if ((a = INTERSECT(x, y, w, h, m)) > area) {
   1524 			area = a;
   1525 			r = m;
   1526 		}
   1527 	return r;
   1528 }
   1529 
   1530 void
   1531 resize(Client *c, int x, int y, int w, int h, int interact)
   1532 {
   1533 	if (applysizehints(c, &x, &y, &w, &h, interact))
   1534 		resizeclient(c, x, y, w, h);
   1535 }
   1536 
   1537 void
   1538 resizeclient(Client *c, int x, int y, int w, int h)
   1539 {
   1540 	XWindowChanges wc;
   1541 
   1542 	c->oldx = c->x; c->x = wc.x = x;
   1543 	c->oldy = c->y; c->y = wc.y = y;
   1544 	c->oldw = c->w; c->w = wc.width = w;
   1545 	c->oldh = c->h; c->h = wc.height = h;
   1546 	wc.border_width = c->bw;
   1547 	XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
   1548 	configure(c);
   1549 	XSync(dpy, False);
   1550 }
   1551 
   1552 void
   1553 resizemouse(const Arg *arg)
   1554 {
   1555 	int ocx, ocy, nw, nh;
   1556 	Client *c;
   1557 	Monitor *m;
   1558 	XEvent ev;
   1559 	Time lasttime = 0;
   1560 
   1561 	if (!(c = selmon->sel))
   1562 		return;
   1563 	if (c->isfullscreen) /* no support resizing fullscreen windows by mouse */
   1564 		return;
   1565 	restack(selmon);
   1566 	ocx = c->x;
   1567 	ocy = c->y;
   1568 	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
   1569 		None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
   1570 		return;
   1571 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
   1572 	do {
   1573 		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
   1574 		switch(ev.type) {
   1575 		case ConfigureRequest:
   1576 		case Expose:
   1577 		case MapRequest:
   1578 			handler[ev.type](&ev);
   1579 			break;
   1580 		case MotionNotify:
   1581 			if ((ev.xmotion.time - lasttime) <= (1000 / 60))
   1582 				continue;
   1583 			lasttime = ev.xmotion.time;
   1584 
   1585 			nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
   1586 			nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
   1587 			if (c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
   1588 			&& c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
   1589 			{
   1590 				if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
   1591 				&& (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
   1592 					togglefloating(NULL);
   1593 			}
   1594 			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
   1595 				resize(c, c->x, c->y, nw, nh, 1);
   1596 			break;
   1597 		}
   1598 	} while (ev.type != ButtonRelease);
   1599 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
   1600 	XUngrabPointer(dpy, CurrentTime);
   1601 	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
   1602 	if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
   1603 		sendmon(c, m);
   1604 		selmon = m;
   1605 		focus(NULL);
   1606 	}
   1607 }
   1608 
   1609 void
   1610 restack(Monitor *m)
   1611 {
   1612 	Client *c;
   1613 	XEvent ev;
   1614 	XWindowChanges wc;
   1615 
   1616 	drawbar(m);
   1617 	if (!m->sel)
   1618 		return;
   1619 	if (m->sel->isfloating || !m->lt[m->sellt]->arrange)
   1620 		XRaiseWindow(dpy, m->sel->win);
   1621 	if (m->lt[m->sellt]->arrange) {
   1622 		wc.stack_mode = Below;
   1623 		wc.sibling = m->barwin;
   1624 		for (c = m->stack; c; c = c->snext)
   1625 			if (!c->isfloating && ISVISIBLE(c)) {
   1626 				XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
   1627 				wc.sibling = c->win;
   1628 			}
   1629 	}
   1630 	XSync(dpy, False);
   1631 	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
   1632 }
   1633 
   1634 void
   1635 run(void)
   1636 {
   1637 	XEvent ev;
   1638 	/* main event loop */
   1639 	XSync(dpy, False);
   1640 	while (running && !XNextEvent(dpy, &ev))
   1641 		if (handler[ev.type])
   1642 			handler[ev.type](&ev); /* call handler */
   1643 }
   1644 
   1645 void
   1646 scan(void)
   1647 {
   1648 	unsigned int i, num;
   1649 	Window d1, d2, *wins = NULL;
   1650 	XWindowAttributes wa;
   1651 
   1652 	if (XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
   1653 		for (i = 0; i < num; i++) {
   1654 			if (!XGetWindowAttributes(dpy, wins[i], &wa)
   1655 			|| wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
   1656 				continue;
   1657 			if (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
   1658 				manage(wins[i], &wa);
   1659 		}
   1660 		for (i = 0; i < num; i++) { /* now the transients */
   1661 			if (!XGetWindowAttributes(dpy, wins[i], &wa))
   1662 				continue;
   1663 			if (XGetTransientForHint(dpy, wins[i], &d1)
   1664 			&& (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
   1665 				manage(wins[i], &wa);
   1666 		}
   1667 		if (wins)
   1668 			XFree(wins);
   1669 	}
   1670 }
   1671 
   1672 void
   1673 sendmon(Client *c, Monitor *m)
   1674 {
   1675 	if (c->mon == m)
   1676 		return;
   1677 	unfocus(c, 1);
   1678 	detach(c);
   1679 	detachstack(c);
   1680 	c->mon = m;
   1681 	c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
   1682 	attach(c);
   1683 	attachstack(c);
   1684 	focus(NULL);
   1685 	arrange(NULL);
   1686 }
   1687 
   1688 void
   1689 setclientstate(Client *c, long state)
   1690 {
   1691 	long data[] = { state, None };
   1692 
   1693 	XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
   1694 		PropModeReplace, (unsigned char *)data, 2);
   1695 }
   1696 
   1697 int
   1698 sendevent(Client *c, Atom proto)
   1699 {
   1700 	int n;
   1701 	Atom *protocols;
   1702 	int exists = 0;
   1703 	XEvent ev;
   1704 
   1705 	if (XGetWMProtocols(dpy, c->win, &protocols, &n)) {
   1706 		while (!exists && n--)
   1707 			exists = protocols[n] == proto;
   1708 		XFree(protocols);
   1709 	}
   1710 	if (exists) {
   1711 		ev.type = ClientMessage;
   1712 		ev.xclient.window = c->win;
   1713 		ev.xclient.message_type = wmatom[WMProtocols];
   1714 		ev.xclient.format = 32;
   1715 		ev.xclient.data.l[0] = proto;
   1716 		ev.xclient.data.l[1] = CurrentTime;
   1717 		XSendEvent(dpy, c->win, False, NoEventMask, &ev);
   1718 	}
   1719 	return exists;
   1720 }
   1721 
   1722 void
   1723 setfocus(Client *c)
   1724 {
   1725 	if (!c->neverfocus) {
   1726 		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
   1727 		XChangeProperty(dpy, root, netatom[NetActiveWindow],
   1728 			XA_WINDOW, 32, PropModeReplace,
   1729 			(unsigned char *) &(c->win), 1);
   1730 	}
   1731 	sendevent(c, wmatom[WMTakeFocus]);
   1732 }
   1733 
   1734 void
   1735 setfullscreen(Client *c, int fullscreen)
   1736 {
   1737 	if (fullscreen && !c->isfullscreen) {
   1738 		XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
   1739 			PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
   1740 		c->isfullscreen = 1;
   1741 		c->oldstate = c->isfloating;
   1742 		c->oldbw = c->bw;
   1743 		c->bw = 0;
   1744 		c->isfloating = 1;
   1745 		resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
   1746 		XRaiseWindow(dpy, c->win);
   1747 	} else if (!fullscreen && c->isfullscreen){
   1748 		XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
   1749 			PropModeReplace, (unsigned char*)0, 0);
   1750 		c->isfullscreen = 0;
   1751 		c->isfloating = c->oldstate;
   1752 		c->bw = c->oldbw;
   1753 		c->x = c->oldx;
   1754 		c->y = c->oldy;
   1755 		c->w = c->oldw;
   1756 		c->h = c->oldh;
   1757 		resizeclient(c, c->x, c->y, c->w, c->h);
   1758 		arrange(c->mon);
   1759 	}
   1760 }
   1761 
   1762 void
   1763 setlayout(const Arg *arg)
   1764 {
   1765 	if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
   1766 		selmon->sellt ^= 1;
   1767 	if (arg && arg->v)
   1768 		selmon->lt[selmon->sellt] = (Layout *)arg->v;
   1769 	strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
   1770 	if (selmon->sel)
   1771 		arrange(selmon);
   1772 	else
   1773 		drawbar(selmon);
   1774 }
   1775 
   1776 /* arg > 1.0 will set mfact absolutely */
   1777 void
   1778 setmfact(const Arg *arg)
   1779 {
   1780 	float f;
   1781 
   1782 	if (!arg || !selmon->lt[selmon->sellt]->arrange)
   1783 		return;
   1784 	f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
   1785 	if (f < 0.05 || f > 0.95)
   1786 		return;
   1787 	selmon->mfact = f;
   1788 	arrange(selmon);
   1789 }
   1790 
   1791 void
   1792 setup(void)
   1793 {
   1794 	int i;
   1795 	XSetWindowAttributes wa;
   1796 	Atom utf8string;
   1797 
   1798 	/* clean up any zombies immediately */
   1799 	sigchld(0);
   1800 
   1801     signal(SIGHUP, sighup);
   1802     signal(SIGTERM, sigterm);
   1803 
   1804 	/* init screen */
   1805 	screen = DefaultScreen(dpy);
   1806 	sw = DisplayWidth(dpy, screen);
   1807 	sh = DisplayHeight(dpy, screen);
   1808 	root = RootWindow(dpy, screen);
   1809 	xinitvisual();
   1810 	drw = drw_create(dpy, screen, root, sw, sh, visual, depth, cmap);
   1811 	if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
   1812 		die("no fonts could be loaded.");
   1813 	lrpad = drw->fonts->h;
   1814 	bh = drw->fonts->h + 2;
   1815 	updategeom();
   1816 	sp = sidepad;
   1817 	vp = (topbar == 1) ? vertpad : - vertpad;
   1818 
   1819 	/* init atoms */
   1820 	utf8string = XInternAtom(dpy, "UTF8_STRING", False);
   1821 	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
   1822 	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
   1823 	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
   1824 	wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
   1825 	netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
   1826 	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
   1827 	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
   1828 	netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
   1829 	netatom[NetWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
   1830 	netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
   1831 	netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
   1832 	netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
   1833 	netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
   1834 	/* init cursors */
   1835 	cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
   1836 	cursor[CurResize] = drw_cur_create(drw, XC_sizing);
   1837 	cursor[CurMove] = drw_cur_create(drw, XC_fleur);
   1838 	/* init appearance */
   1839 	scheme = ecalloc(LENGTH(colors), sizeof(Clr *));
   1840 	for (i = 0; i < LENGTH(colors); i++)
   1841 		scheme[i] = drw_scm_create(drw, colors[i], alphas[i], 3);
   1842 	/* init bars */
   1843 	updatebars();
   1844 	updatestatus();
   1845 	updatebarpos(selmon);
   1846 	/* supporting window for NetWMCheck */
   1847 	wmcheckwin = XCreateSimpleWindow(dpy, root, 0, 0, 1, 1, 0, 0, 0);
   1848 	XChangeProperty(dpy, wmcheckwin, netatom[NetWMCheck], XA_WINDOW, 32,
   1849 		PropModeReplace, (unsigned char *) &wmcheckwin, 1);
   1850 	XChangeProperty(dpy, wmcheckwin, netatom[NetWMName], utf8string, 8,
   1851 		PropModeReplace, (unsigned char *) "dwm", 3);
   1852 	XChangeProperty(dpy, root, netatom[NetWMCheck], XA_WINDOW, 32,
   1853 		PropModeReplace, (unsigned char *) &wmcheckwin, 1);
   1854 	/* EWMH support per view */
   1855 	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
   1856 		PropModeReplace, (unsigned char *) netatom, NetLast);
   1857 	XDeleteProperty(dpy, root, netatom[NetClientList]);
   1858 	/* select events */
   1859 	wa.cursor = cursor[CurNormal]->cursor;
   1860 	wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
   1861 		|ButtonPressMask|PointerMotionMask|EnterWindowMask
   1862 		|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
   1863 	XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
   1864 	XSelectInput(dpy, root, wa.event_mask);
   1865 	grabkeys();
   1866 	focus(NULL);
   1867 }
   1868 
   1869 
   1870 void
   1871 seturgent(Client *c, int urg)
   1872 {
   1873 	XWMHints *wmh;
   1874 
   1875 	c->isurgent = urg;
   1876 	if (!(wmh = XGetWMHints(dpy, c->win)))
   1877 		return;
   1878 	wmh->flags = urg ? (wmh->flags | XUrgencyHint) : (wmh->flags & ~XUrgencyHint);
   1879 	XSetWMHints(dpy, c->win, wmh);
   1880 	XFree(wmh);
   1881 }
   1882 
   1883 void
   1884 showhide(Client *c)
   1885 {
   1886 	if (!c)
   1887 		return;
   1888 	if (ISVISIBLE(c)) {
   1889 		/* show clients top down */
   1890 		XMoveWindow(dpy, c->win, c->x, c->y);
   1891 		if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
   1892 			resize(c, c->x, c->y, c->w, c->h, 0);
   1893 		showhide(c->snext);
   1894 	} else {
   1895 		/* hide clients bottom up */
   1896 		showhide(c->snext);
   1897 		XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
   1898 	}
   1899 }
   1900 
   1901 void
   1902 sigchld(int unused)
   1903 {
   1904     pid_t pid;
   1905 
   1906 	if (signal(SIGCHLD, sigchld) == SIG_ERR)
   1907 		die("can't install SIGCHLD handler:");
   1908 	while (0 < (pid = waitpid(-1, NULL, WNOHANG))) {
   1909 		pid_t *p, *lim;
   1910 
   1911 		if (!(p = autostart_pids))
   1912 			continue;
   1913 		lim = &p[autostart_len];
   1914 
   1915 		for (; p < lim; p++) {
   1916 			if (*p == pid) {
   1917 				*p = -1;
   1918 				break;
   1919 			}
   1920 		}
   1921 
   1922 	}
   1923 }
   1924 
   1925 void
   1926 sigstatusbar(const Arg *arg)
   1927 {
   1928 	union sigval sv;
   1929 
   1930 	if (!statussig)
   1931 		return;
   1932     sv.sival_int = arg->i | (statussig << 8);
   1933 	if ((statuspid = getstatusbarpid()) <= 0)
   1934 		return;
   1935 
   1936     sigqueue(statuspid, SIGUSR1, sv);
   1937 }
   1938 
   1939 void
   1940 sighup(int unused)
   1941 {
   1942     Arg a = {.i = 1};
   1943     quit(&a);
   1944 }
   1945 
   1946 void
   1947 sigterm(int unused)
   1948 {
   1949     Arg a = {.i = 0};
   1950     quit(&a);
   1951 }
   1952 
   1953 void
   1954 spawn(const Arg *arg)
   1955 {
   1956 	if (fork() == 0) {
   1957 		if (dpy)
   1958 			close(ConnectionNumber(dpy));
   1959 		setsid();
   1960 		execvp(((char **)arg->v)[0], (char **)arg->v);
   1961 		fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
   1962 		perror(" failed");
   1963 		exit(EXIT_SUCCESS);
   1964 	}
   1965 }
   1966 
   1967 void
   1968 tag(const Arg *arg)
   1969 {
   1970 	if (selmon->sel && arg->ui & TAGMASK) {
   1971 		selmon->sel->tags = arg->ui & TAGMASK;
   1972 		focus(NULL);
   1973 		arrange(selmon);
   1974 	}
   1975 }
   1976 
   1977 void
   1978 tagmon(const Arg *arg)
   1979 {
   1980 	if (!selmon->sel || !mons->next)
   1981 		return;
   1982 	sendmon(selmon->sel, dirtomon(arg->i));
   1983 }
   1984 
   1985 void
   1986 togglebar(const Arg *arg)
   1987 {
   1988 	selmon->showbar = !selmon->showbar;
   1989 	updatebarpos(selmon);
   1990 	XMoveResizeWindow(dpy, selmon->barwin, selmon->wx + sp, selmon->by + vp, selmon->ww - 2 * sp, bh);
   1991 	arrange(selmon);
   1992 }
   1993 
   1994 void
   1995 togglefloating(const Arg *arg)
   1996 {
   1997 	if (!selmon->sel)
   1998 		return;
   1999 	if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
   2000 		return;
   2001 	selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
   2002 	if (selmon->sel->isfloating)
   2003 		resize(selmon->sel, selmon->sel->x, selmon->sel->y,
   2004 			selmon->sel->w, selmon->sel->h, 0);
   2005 	arrange(selmon);
   2006 }
   2007 
   2008 togglesticky(const Arg *arg)
   2009 {
   2010 	if (!selmon->sel)
   2011 		return;
   2012 	selmon->sel->issticky = !selmon->sel->issticky;
   2013 	arrange(selmon);
   2014 }
   2015 
   2016 void
   2017 togglefullscr(const Arg *arg)
   2018 {
   2019   if(selmon->sel)
   2020     setfullscreen(selmon->sel, !selmon->sel->isfullscreen);
   2021 }
   2022 
   2023 void
   2024 toggletag(const Arg *arg)
   2025 {
   2026 	unsigned int newtags;
   2027 
   2028 	if (!selmon->sel)
   2029 		return;
   2030 	newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
   2031 	if (newtags) {
   2032 		selmon->sel->tags = newtags;
   2033 		focus(NULL);
   2034 		arrange(selmon);
   2035 	}
   2036 }
   2037 
   2038 void
   2039 toggleview(const Arg *arg)
   2040 {
   2041 	unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
   2042 
   2043 	if (newtagset) {
   2044 		selmon->tagset[selmon->seltags] = newtagset;
   2045 		focus(NULL);
   2046 		arrange(selmon);
   2047 	}
   2048 }
   2049 
   2050 void
   2051 unfocus(Client *c, int setfocus)
   2052 {
   2053 	if (!c)
   2054 		return;
   2055 	grabbuttons(c, 0);
   2056 	XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);
   2057 	if (setfocus) {
   2058 		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
   2059 		XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
   2060 	}
   2061 }
   2062 
   2063 void
   2064 unmanage(Client *c, int destroyed)
   2065 {
   2066 	Monitor *m = c->mon;
   2067 	XWindowChanges wc;
   2068 
   2069 	if (c->swallowing) {
   2070 		unswallow(c);
   2071 		return;
   2072 	}
   2073 
   2074 	Client *s = swallowingclient(c->win);
   2075 	if (s) {
   2076 		free(s->swallowing);
   2077 		s->swallowing = NULL;
   2078 		arrange(m);
   2079 		focus(NULL);
   2080 		return;
   2081 	}
   2082 
   2083 	detach(c);
   2084 	detachstack(c);
   2085 	if (!destroyed) {
   2086 		wc.border_width = c->oldbw;
   2087 		XGrabServer(dpy); /* avoid race conditions */
   2088 		XSetErrorHandler(xerrordummy);
   2089 		XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
   2090 		XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
   2091 		setclientstate(c, WithdrawnState);
   2092 		XSync(dpy, False);
   2093 		XSetErrorHandler(xerror);
   2094 		XUngrabServer(dpy);
   2095 	}
   2096 	free(c);
   2097 
   2098 	if (!s) {
   2099 		arrange(m);
   2100 		focus(NULL);
   2101 		updateclientlist();
   2102 	}
   2103 }
   2104 
   2105 void
   2106 unmapnotify(XEvent *e)
   2107 {
   2108 	Client *c;
   2109 	XUnmapEvent *ev = &e->xunmap;
   2110 
   2111 	if ((c = wintoclient(ev->window))) {
   2112 		if (ev->send_event)
   2113 			setclientstate(c, WithdrawnState);
   2114 		else
   2115 			unmanage(c, 0);
   2116 	}
   2117 }
   2118 
   2119 void
   2120 updatebars(void)
   2121 {
   2122 	Monitor *m;
   2123 	XSetWindowAttributes wa = {
   2124 		.override_redirect = True,
   2125 		.background_pixel = 0,
   2126 		.border_pixel = 0,
   2127 		.colormap = cmap,
   2128 		.event_mask = ButtonPressMask|ExposureMask
   2129 	};
   2130 	XClassHint ch = {"dwm", "dwm"};
   2131 	for (m = mons; m; m = m->next) {
   2132 		if (m->barwin)
   2133 			continue;
   2134 		m->barwin = XCreateWindow(dpy, root, m->wx + sp, m->by + vp, m->ww - 2 * sp, bh, 0, depth,
   2135 				InputOutput, visual,
   2136 				CWOverrideRedirect|CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &wa);
   2137 		XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
   2138 		XMapRaised(dpy, m->barwin);
   2139 		XSetClassHint(dpy, m->barwin, &ch);
   2140 	}
   2141 }
   2142 
   2143 void
   2144 updatebarpos(Monitor *m)
   2145 {
   2146 	m->wy = m->my;
   2147 	m->wh = m->mh;
   2148 	if (m->showbar) {
   2149 		m->wh = m->wh - vertpad - bh;
   2150 		m->by = m->topbar ? m->wy : m->wy + m->wh + vertpad;
   2151 		m->wy = m->topbar ? m->wy + bh + vp : m->wy;
   2152 	} else
   2153 		m->by = -bh - vp;
   2154 }
   2155 
   2156 void
   2157 updateclientlist()
   2158 {
   2159 	Client *c;
   2160 	Monitor *m;
   2161 
   2162 	XDeleteProperty(dpy, root, netatom[NetClientList]);
   2163 	for (m = mons; m; m = m->next)
   2164 		for (c = m->clients; c; c = c->next)
   2165 			XChangeProperty(dpy, root, netatom[NetClientList],
   2166 				XA_WINDOW, 32, PropModeAppend,
   2167 				(unsigned char *) &(c->win), 1);
   2168 }
   2169 
   2170 int
   2171 updategeom(void)
   2172 {
   2173 	int dirty = 0;
   2174 
   2175 #ifdef XINERAMA
   2176 	if (XineramaIsActive(dpy)) {
   2177 		int i, j, n, nn;
   2178 		Client *c;
   2179 		Monitor *m;
   2180 		XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
   2181 		XineramaScreenInfo *unique = NULL;
   2182 
   2183 		for (n = 0, m = mons; m; m = m->next, n++);
   2184 		/* only consider unique geometries as separate screens */
   2185 		unique = ecalloc(nn, sizeof(XineramaScreenInfo));
   2186 		for (i = 0, j = 0; i < nn; i++)
   2187 			if (isuniquegeom(unique, j, &info[i]))
   2188 				memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
   2189 		XFree(info);
   2190 		nn = j;
   2191 		if (n <= nn) { /* new monitors available */
   2192 			for (i = 0; i < (nn - n); i++) {
   2193 				for (m = mons; m && m->next; m = m->next);
   2194 				if (m)
   2195 					m->next = createmon();
   2196 				else
   2197 					mons = createmon();
   2198 			}
   2199 			for (i = 0, m = mons; i < nn && m; m = m->next, i++)
   2200 				if (i >= n
   2201 				|| unique[i].x_org != m->mx || unique[i].y_org != m->my
   2202 				|| unique[i].width != m->mw || unique[i].height != m->mh)
   2203 				{
   2204 					dirty = 1;
   2205 					m->num = i;
   2206 					m->mx = m->wx = unique[i].x_org;
   2207 					m->my = m->wy = unique[i].y_org;
   2208 					m->mw = m->ww = unique[i].width;
   2209 					m->mh = m->wh = unique[i].height;
   2210 					updatebarpos(m);
   2211 				}
   2212 		} else { /* less monitors available nn < n */
   2213 			for (i = nn; i < n; i++) {
   2214 				for (m = mons; m && m->next; m = m->next);
   2215 				while ((c = m->clients)) {
   2216 					dirty = 1;
   2217 					m->clients = c->next;
   2218 					detachstack(c);
   2219 					c->mon = mons;
   2220 					attach(c);
   2221 					attachstack(c);
   2222 				}
   2223 				if (m == selmon)
   2224 					selmon = mons;
   2225 				cleanupmon(m);
   2226 			}
   2227 		}
   2228 		free(unique);
   2229 	} else
   2230 #endif /* XINERAMA */
   2231 	{ /* default monitor setup */
   2232 		if (!mons)
   2233 			mons = createmon();
   2234 		if (mons->mw != sw || mons->mh != sh) {
   2235 			dirty = 1;
   2236 			mons->mw = mons->ww = sw;
   2237 			mons->mh = mons->wh = sh;
   2238 			updatebarpos(mons);
   2239 		}
   2240 	}
   2241 	if (dirty) {
   2242 		selmon = mons;
   2243 		selmon = wintomon(root);
   2244 	}
   2245 	return dirty;
   2246 }
   2247 
   2248 void
   2249 updatenumlockmask(void)
   2250 {
   2251 	unsigned int i, j;
   2252 	XModifierKeymap *modmap;
   2253 
   2254 	numlockmask = 0;
   2255 	modmap = XGetModifierMapping(dpy);
   2256 	for (i = 0; i < 8; i++)
   2257 		for (j = 0; j < modmap->max_keypermod; j++)
   2258 			if (modmap->modifiermap[i * modmap->max_keypermod + j]
   2259 				== XKeysymToKeycode(dpy, XK_Num_Lock))
   2260 				numlockmask = (1 << i);
   2261 	XFreeModifiermap(modmap);
   2262 }
   2263 
   2264 void
   2265 updatesizehints(Client *c)
   2266 {
   2267 	long msize;
   2268 	XSizeHints size;
   2269 
   2270 	if (!XGetWMNormalHints(dpy, c->win, &size, &msize))
   2271 		/* size is uninitialized, ensure that size.flags aren't used */
   2272 		size.flags = PSize;
   2273 	if (size.flags & PBaseSize) {
   2274 		c->basew = size.base_width;
   2275 		c->baseh = size.base_height;
   2276 	} else if (size.flags & PMinSize) {
   2277 		c->basew = size.min_width;
   2278 		c->baseh = size.min_height;
   2279 	} else
   2280 		c->basew = c->baseh = 0;
   2281 	if (size.flags & PResizeInc) {
   2282 		c->incw = size.width_inc;
   2283 		c->inch = size.height_inc;
   2284 	} else
   2285 		c->incw = c->inch = 0;
   2286 	if (size.flags & PMaxSize) {
   2287 		c->maxw = size.max_width;
   2288 		c->maxh = size.max_height;
   2289 	} else
   2290 		c->maxw = c->maxh = 0;
   2291 	if (size.flags & PMinSize) {
   2292 		c->minw = size.min_width;
   2293 		c->minh = size.min_height;
   2294 	} else if (size.flags & PBaseSize) {
   2295 		c->minw = size.base_width;
   2296 		c->minh = size.base_height;
   2297 	} else
   2298 		c->minw = c->minh = 0;
   2299 	if (size.flags & PAspect) {
   2300 		c->mina = (float)size.min_aspect.y / size.min_aspect.x;
   2301 		c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
   2302 	} else
   2303 		c->maxa = c->mina = 0.0;
   2304 	c->isfixed = (c->maxw && c->maxh && c->maxw == c->minw && c->maxh == c->minh);
   2305 }
   2306 
   2307 void
   2308 updatestatus(void)
   2309 {
   2310 	if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext))) {
   2311 		strcpy(stext, "dwm-"VERSION);
   2312 		statusw = TEXTW(stext) - lrpad + 2;
   2313 	} else {
   2314 		char *text, *s, ch;
   2315 
   2316 		statusw  = 0;
   2317 		for (text = s = stext; *s; s++) {
   2318 			if ((unsigned char)(*s) < ' ') {
   2319 				ch = *s;
   2320 				*s = '\0';
   2321 				statusw += TEXTW(text) - lrpad;
   2322 				*s = ch;
   2323 				text = s + 1;
   2324 			}
   2325 		}
   2326 		statusw += TEXTW(text) - lrpad + 2;
   2327 
   2328 	}
   2329 	drawbar(selmon);
   2330 }
   2331 
   2332 void
   2333 updatetitle(Client *c)
   2334 {
   2335 	if (!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
   2336 		gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
   2337 	if (c->name[0] == '\0') /* hack to mark broken clients */
   2338 		strcpy(c->name, broken);
   2339 }
   2340 
   2341 void
   2342 updatewindowtype(Client *c)
   2343 {
   2344 	Atom state = getatomprop(c, netatom[NetWMState]);
   2345 	Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
   2346 
   2347 	if (state == netatom[NetWMFullscreen])
   2348 		setfullscreen(c, 1);
   2349 	if (wtype == netatom[NetWMWindowTypeDialog])
   2350 		c->isfloating = 1;
   2351 }
   2352 
   2353 void
   2354 updatewmhints(Client *c)
   2355 {
   2356 	XWMHints *wmh;
   2357 
   2358 	if ((wmh = XGetWMHints(dpy, c->win))) {
   2359 		if (c == selmon->sel && wmh->flags & XUrgencyHint) {
   2360 			wmh->flags &= ~XUrgencyHint;
   2361 			XSetWMHints(dpy, c->win, wmh);
   2362 		} else
   2363 			c->isurgent = (wmh->flags & XUrgencyHint) ? 1 : 0;
   2364 		if (wmh->flags & InputHint)
   2365 			c->neverfocus = !wmh->input;
   2366 		else
   2367 			c->neverfocus = 0;
   2368 		XFree(wmh);
   2369 	}
   2370 }
   2371 
   2372 void
   2373 view(const Arg *arg)
   2374 {
   2375 	if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
   2376 		return;
   2377 	selmon->seltags ^= 1; /* toggle sel tagset */
   2378 	if (arg->ui & TAGMASK)
   2379 		selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
   2380 	focus(NULL);
   2381 	arrange(selmon);
   2382 }
   2383 
   2384 pid_t
   2385 winpid(Window w)
   2386 {
   2387 
   2388 	pid_t result = 0;
   2389 
   2390 #ifdef __linux__
   2391 	xcb_res_client_id_spec_t spec = {0};
   2392 	spec.client = w;
   2393 	spec.mask = XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID;
   2394 
   2395 	xcb_generic_error_t *e = NULL;
   2396 	xcb_res_query_client_ids_cookie_t c = xcb_res_query_client_ids(xcon, 1, &spec);
   2397 	xcb_res_query_client_ids_reply_t *r = xcb_res_query_client_ids_reply(xcon, c, &e);
   2398 
   2399 	if (!r)
   2400 		return (pid_t)0;
   2401 
   2402 	xcb_res_client_id_value_iterator_t i = xcb_res_query_client_ids_ids_iterator(r);
   2403 	for (; i.rem; xcb_res_client_id_value_next(&i)) {
   2404 		spec = i.data->spec;
   2405 		if (spec.mask & XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID) {
   2406 			uint32_t *t = xcb_res_client_id_value_value(i.data);
   2407 			result = *t;
   2408 			break;
   2409 		}
   2410 	}
   2411 
   2412 	free(r);
   2413 
   2414 	if (result == (pid_t)-1)
   2415 		result = 0;
   2416 
   2417 #endif /* __linux__ */
   2418 
   2419 #ifdef __OpenBSD__
   2420         Atom type;
   2421         int format;
   2422         unsigned long len, bytes;
   2423         unsigned char *prop;
   2424         pid_t ret;
   2425 
   2426         if (XGetWindowProperty(dpy, w, XInternAtom(dpy, "_NET_WM_PID", 0), 0, 1, False, AnyPropertyType, &type, &format, &len, &bytes, &prop) != Success || !prop)
   2427                return 0;
   2428 
   2429         ret = *(pid_t*)prop;
   2430         XFree(prop);
   2431         result = ret;
   2432 
   2433 #endif /* __OpenBSD__ */
   2434 	return result;
   2435 }
   2436 
   2437 pid_t
   2438 getparentprocess(pid_t p)
   2439 {
   2440 	unsigned int v = 0;
   2441 
   2442 #ifdef __linux__
   2443 	FILE *f;
   2444 	char buf[256];
   2445 	snprintf(buf, sizeof(buf) - 1, "/proc/%u/stat", (unsigned)p);
   2446 
   2447 	if (!(f = fopen(buf, "r")))
   2448 		return 0;
   2449 
   2450 	fscanf(f, "%*u %*s %*c %u", &v);
   2451 	fclose(f);
   2452 #endif /* __linux__*/
   2453 
   2454 #ifdef __OpenBSD__
   2455 	int n;
   2456 	kvm_t *kd;
   2457 	struct kinfo_proc *kp;
   2458 
   2459 	kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, NULL);
   2460 	if (!kd)
   2461 		return 0;
   2462 
   2463 	kp = kvm_getprocs(kd, KERN_PROC_PID, p, sizeof(*kp), &n);
   2464 	v = kp->p_ppid;
   2465 #endif /* __OpenBSD__ */
   2466 
   2467 	return (pid_t)v;
   2468 }
   2469 
   2470 int
   2471 isdescprocess(pid_t p, pid_t c)
   2472 {
   2473 	while (p != c && c != 0)
   2474 		c = getparentprocess(c);
   2475 
   2476 	return (int)c;
   2477 }
   2478 
   2479 Client *
   2480 termforwin(const Client *w)
   2481 {
   2482 	Client *c;
   2483 	Monitor *m;
   2484 
   2485 	if (!w->pid || w->isterminal)
   2486 		return NULL;
   2487 
   2488 	for (m = mons; m; m = m->next) {
   2489 		for (c = m->clients; c; c = c->next) {
   2490 			if (c->isterminal && !c->swallowing && c->pid && isdescprocess(c->pid, w->pid))
   2491 				return c;
   2492 		}
   2493 	}
   2494 
   2495 	return NULL;
   2496 }
   2497 
   2498 Client *
   2499 swallowingclient(Window w)
   2500 {
   2501 	Client *c;
   2502 	Monitor *m;
   2503 
   2504 	for (m = mons; m; m = m->next) {
   2505 		for (c = m->clients; c; c = c->next) {
   2506 			if (c->swallowing && c->swallowing->win == w)
   2507 				return c;
   2508 		}
   2509 	}
   2510 
   2511 	return NULL;
   2512 }
   2513 
   2514 Client *
   2515 wintoclient(Window w)
   2516 {
   2517 	Client *c;
   2518 	Monitor *m;
   2519 
   2520 	for (m = mons; m; m = m->next)
   2521 		for (c = m->clients; c; c = c->next)
   2522 			if (c->win == w)
   2523 				return c;
   2524 	return NULL;
   2525 }
   2526 
   2527 Monitor *
   2528 wintomon(Window w)
   2529 {
   2530 	int x, y;
   2531 	Client *c;
   2532 	Monitor *m;
   2533 
   2534 	if (w == root && getrootptr(&x, &y))
   2535 		return recttomon(x, y, 1, 1);
   2536 	for (m = mons; m; m = m->next)
   2537 		if (w == m->barwin)
   2538 			return m;
   2539 	if ((c = wintoclient(w)))
   2540 		return c->mon;
   2541 	return selmon;
   2542 }
   2543 
   2544 /* There's no way to check accesses to destroyed windows, thus those cases are
   2545  * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
   2546  * default error handler, which may call exit. */
   2547 int
   2548 xerror(Display *dpy, XErrorEvent *ee)
   2549 {
   2550 	if (ee->error_code == BadWindow
   2551 	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
   2552 	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
   2553 	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
   2554 	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
   2555 	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
   2556 	|| (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
   2557 	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
   2558 	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
   2559 		return 0;
   2560 	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
   2561 		ee->request_code, ee->error_code);
   2562 	return xerrorxlib(dpy, ee); /* may call exit */
   2563 }
   2564 
   2565 int
   2566 xerrordummy(Display *dpy, XErrorEvent *ee)
   2567 {
   2568 	return 0;
   2569 }
   2570 
   2571 /* Startup Error handler to check if another window manager
   2572  * is already running. */
   2573 int
   2574 xerrorstart(Display *dpy, XErrorEvent *ee)
   2575 {
   2576 	die("dwm: another window manager is already running");
   2577 	return -1;
   2578 }
   2579 
   2580 void
   2581 xinitvisual()
   2582 {
   2583 	XVisualInfo *infos;
   2584 	XRenderPictFormat *fmt;
   2585 	int nitems;
   2586 	int i;
   2587 
   2588 	XVisualInfo tpl = {
   2589 		.screen = screen,
   2590 		.depth = 32,
   2591 		.class = TrueColor
   2592 	};
   2593 	long masks = VisualScreenMask | VisualDepthMask | VisualClassMask;
   2594 
   2595 	infos = XGetVisualInfo(dpy, masks, &tpl, &nitems);
   2596 	visual = NULL;
   2597 	for(i = 0; i < nitems; i ++) {
   2598 		fmt = XRenderFindVisualFormat(dpy, infos[i].visual);
   2599 		if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
   2600 			visual = infos[i].visual;
   2601 			depth = infos[i].depth;
   2602 			cmap = XCreateColormap(dpy, root, visual, AllocNone);
   2603 			useargb = 1;
   2604 			break;
   2605 		}
   2606 	}
   2607 
   2608 	XFree(infos);
   2609 
   2610 	if (! visual) {
   2611 		visual = DefaultVisual(dpy, screen);
   2612 		depth = DefaultDepth(dpy, screen);
   2613 		cmap = DefaultColormap(dpy, screen);
   2614 	}
   2615 }
   2616 
   2617 void
   2618 zoom(const Arg *arg)
   2619 {
   2620 	Client *c = selmon->sel;
   2621 
   2622 	if (!selmon->lt[selmon->sellt]->arrange
   2623 	|| (selmon->sel && selmon->sel->isfloating))
   2624 		return;
   2625 	if (c == nexttiled(selmon->clients))
   2626 		if (!c || !(c = nexttiled(c->next)))
   2627 			return;
   2628 	pop(c);
   2629 }
   2630 
   2631 void
   2632 resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
   2633 {
   2634 	char *sdst = NULL;
   2635 	int *idst = NULL;
   2636 	float *fdst = NULL;
   2637 
   2638 	sdst = dst;
   2639 	idst = dst;
   2640 	fdst = dst;
   2641 
   2642 	char fullname[256];
   2643 	char *type;
   2644 	XrmValue ret;
   2645 
   2646 	snprintf(fullname, sizeof(fullname), "%s.%s", "dwm", name);
   2647 	fullname[sizeof(fullname) - 1] = '\0';
   2648 
   2649 	XrmGetResource(db, fullname, "*", &type, &ret);
   2650 	if (!(ret.addr == NULL || strncmp("String", type, 64)))
   2651 	{
   2652 		switch (rtype) {
   2653 		case STRING:
   2654 			strcpy(sdst, ret.addr);
   2655 			break;
   2656 		case INTEGER:
   2657 			*idst = strtoul(ret.addr, NULL, 10);
   2658 			break;
   2659 		case FLOAT:
   2660 			*fdst = strtof(ret.addr, NULL);
   2661 			break;
   2662 		}
   2663 	}
   2664 }
   2665 
   2666 void
   2667 load_xresources(void)
   2668 {
   2669 	Display *display;
   2670 	char *resm;
   2671 	XrmDatabase db;
   2672 	ResourcePref *p;
   2673 
   2674 	display = XOpenDisplay(NULL);
   2675 	resm = XResourceManagerString(display);
   2676 	if (!resm)
   2677 		return;
   2678 
   2679 	db = XrmGetStringDatabase(resm);
   2680 	for (p = resources; p < resources + LENGTH(resources); p++)
   2681 		resource_load(db, p->name, p->type, p->dst);
   2682 	XCloseDisplay(display);
   2683 }
   2684 
   2685 void
   2686 reload(const Arg *arg)
   2687 {
   2688     load_xresources();
   2689     int i;
   2690     for (i = 0; i < LENGTH(colors); i++)
   2691         scheme[i] = drw_scm_create(drw, colors[i], alphas[i], 3);
   2692     focus(NULL);
   2693     arrange(NULL);
   2694 }
   2695 
   2696 int
   2697 main(int argc, char *argv[])
   2698 {
   2699 	if (argc == 2 && !strcmp("-v", argv[1]))
   2700 		die("dwm-"VERSION);
   2701 	else if (argc != 1)
   2702 		die("usage: dwm [-v]");
   2703 	if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
   2704 		fputs("warning: no locale support\n", stderr);
   2705 	if (!(dpy = XOpenDisplay(NULL)))
   2706 		die("dwm: cannot open display");
   2707 	if (!(xcon = XGetXCBConnection(dpy)))
   2708 		die("dwm: cannot get xcb connection\n");
   2709 	checkotherwm();
   2710     autostart_exec();
   2711 	XrmInitialize();
   2712 	load_xresources();
   2713 	setup();
   2714 #ifdef __OpenBSD__
   2715 	if (pledge("stdio rpath proc exec ps", NULL) == -1)
   2716 		die("pledge");
   2717 #endif /* __OpenBSD__ */
   2718 	scan();
   2719 	run();
   2720     if(restart) execvp(argv[0], argv);
   2721 	cleanup();
   2722 	XCloseDisplay(dpy);
   2723 	return EXIT_SUCCESS;
   2724 }
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