dwm

My fork of https://dwm.suckless.org/
git clone https://git.inz.fi/dwm/
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dwm.c (71045B)


      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 #ifdef XINERAMA
     40 #include <X11/extensions/Xinerama.h>
     41 #endif /* XINERAMA */
     42 #include <X11/Xft/Xft.h>
     43 
     44 #include "drw.h"
     45 #include "util.h"
     46 
     47 /* macros */
     48 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
     49 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
     50 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
     51                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
     52 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
     53 #define LENGTH(X)               (sizeof X / sizeof X[0])
     54 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
     55 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
     56 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
     57 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
     58 #define TEXTW(X)                (drw_fontset_getwidth(drw, (X)) + lrpad)
     59 
     60 #define SYSTEM_TRAY_REQUEST_DOCK    0
     61 /* XEMBED messages */
     62 #define XEMBED_EMBEDDED_NOTIFY      0
     63 #define XEMBED_WINDOW_ACTIVATE      1
     64 #define XEMBED_FOCUS_IN             4
     65 #define XEMBED_MODALITY_ON         10
     66 #define XEMBED_MAPPED              (1 << 0)
     67 #define XEMBED_WINDOW_ACTIVATE      1
     68 #define XEMBED_WINDOW_DEACTIVATE    2
     69 #define VERSION_MAJOR               0
     70 #define VERSION_MINOR               0
     71 #define XEMBED_EMBEDDED_VERSION (VERSION_MAJOR << 16) | VERSION_MINOR
     72 
     73 /* enums */
     74 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
     75 enum { SchemeNorm, SchemeSel }; /* color schemes */
     76 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
     77        NetSystemTray, NetSystemTrayOP, NetSystemTrayOrientation, NetSystemTrayOrientationHorz,
     78        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
     79        NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
     80 enum { Manager, Xembed, XembedInfo, XLast }; /* Xembed atoms */
     81 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
     82 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
     83        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
     84 
     85 typedef union {
     86 	int i;
     87 	unsigned int ui;
     88 	float f;
     89 	const void *v;
     90 } Arg;
     91 
     92 typedef struct {
     93 	unsigned int click;
     94 	unsigned int mask;
     95 	unsigned int button;
     96 	void (*func)(const Arg *arg);
     97 	const Arg arg;
     98 } Button;
     99 
    100 typedef struct Monitor Monitor;
    101 typedef struct Client Client;
    102 struct Client {
    103 	char name[256];
    104 	float mina, maxa;
    105 	int x, y, w, h;
    106 	int oldx, oldy, oldw, oldh;
    107 	int basew, baseh, incw, inch, maxw, maxh, minw, minh, hintsvalid;
    108 	int bw, oldbw;
    109 	unsigned int tags;
    110 	int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
    111 	Client *next;
    112 	Client *snext;
    113 	Monitor *mon;
    114 	Window win;
    115 };
    116 
    117 typedef struct {
    118 	unsigned int mod;
    119 	KeySym keysym;
    120 	void (*func)(const Arg *);
    121 	const Arg arg;
    122 } Key;
    123 
    124 typedef struct {
    125 	const char *symbol;
    126 	void (*arrange)(Monitor *);
    127 } Layout;
    128 
    129 struct Monitor {
    130 	char ltsymbol[16];
    131 	float mfact;
    132 	int nmaster;
    133 	int num;
    134 	int by;               /* bar geometry */
    135 	int mx, my, mw, mh;   /* screen size */
    136 	int wx, wy, ww, wh;   /* window area  */
    137 	unsigned int seltags;
    138 	unsigned int sellt;
    139 	unsigned int tagset[2];
    140 	int showbar;
    141 	int topbar;
    142 	Client *clients;
    143 	Client *sel;
    144 	Client *stack;
    145 	Monitor *next;
    146 	Window barwin;
    147 	const Layout *lt[2];
    148 };
    149 
    150 typedef struct {
    151 	const char *class;
    152 	const char *instance;
    153 	const char *title;
    154 	unsigned int tags;
    155 	int isfloating;
    156 	int monitor;
    157 } Rule;
    158 
    159 typedef struct Systray   Systray;
    160 struct Systray {
    161 	Window win;
    162 	Client *icons;
    163 };
    164 
    165 /* function declarations */
    166 static void applyrules(Client *c);
    167 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
    168 static void arrange(Monitor *m);
    169 static void arrangemon(Monitor *m);
    170 static void attach(Client *c);
    171 static void attachstack(Client *c);
    172 static void buttonpress(XEvent *e);
    173 static void checkotherwm(void);
    174 static void cleanup(void);
    175 static void cleanupmon(Monitor *mon);
    176 static void clientmessage(XEvent *e);
    177 static void configure(Client *c);
    178 static void configurenotify(XEvent *e);
    179 static void configurerequest(XEvent *e);
    180 static Monitor *createmon(void);
    181 static void destroynotify(XEvent *e);
    182 static void detach(Client *c);
    183 static void detachstack(Client *c);
    184 static Monitor *dirtomon(int dir);
    185 static void drawbar(Monitor *m);
    186 static void drawbars(void);
    187 static void enternotify(XEvent *e);
    188 static void expose(XEvent *e);
    189 static void focus(Client *c);
    190 static void focusin(XEvent *e);
    191 static void focusmon(const Arg *arg);
    192 static void focusstack(const Arg *arg);
    193 static Atom getatomprop(Client *c, Atom prop);
    194 static int getrootptr(int *x, int *y);
    195 static long getstate(Window w);
    196 static unsigned int getsystraywidth();
    197 static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
    198 static void grabbuttons(Client *c, int focused);
    199 static void grabkeys(void);
    200 static void incnmaster(const Arg *arg);
    201 static void keypress(XEvent *e);
    202 static void killclient(const Arg *arg);
    203 static void manage(Window w, XWindowAttributes *wa);
    204 static void mappingnotify(XEvent *e);
    205 static void maprequest(XEvent *e);
    206 static void monocle(Monitor *m);
    207 static void motionnotify(XEvent *e);
    208 static void movemouse(const Arg *arg);
    209 static Client *nexttiled(Client *c);
    210 static void pop(Client *c);
    211 static void propertynotify(XEvent *e);
    212 static void quit(const Arg *arg);
    213 static Monitor *recttomon(int x, int y, int w, int h);
    214 static void removesystrayicon(Client *i);
    215 static void resize(Client *c, int x, int y, int w, int h, int interact);
    216 static void resizebarwin(Monitor *m);
    217 static void resizeclient(Client *c, int x, int y, int w, int h);
    218 static void resizemouse(const Arg *arg);
    219 static void resizerequest(XEvent *e);
    220 static void restack(Monitor *m);
    221 static void run(void);
    222 static void scan(void);
    223 static int sendevent(Window w, Atom proto, int m, long d0, long d1, long d2, long d3, long d4);
    224 static void sendmon(Client *c, Monitor *m);
    225 static void setclientstate(Client *c, long state);
    226 static void setfocus(Client *c);
    227 static void setfullscreen(Client *c, int fullscreen);
    228 static void setlayout(const Arg *arg);
    229 static void setmfact(const Arg *arg);
    230 static void setup(void);
    231 static void seturgent(Client *c, int urg);
    232 static void showhide(Client *c);
    233 static void spawn(const Arg *arg);
    234 static Monitor *systraytomon(Monitor *m);
    235 static void tag(const Arg *arg);
    236 static void tagmon(const Arg *arg);
    237 static void tile(Monitor *m);
    238 static void togglebar(const Arg *arg);
    239 static void togglefloating(const Arg *arg);
    240 static void toggletag(const Arg *arg);
    241 static void toggleview(const Arg *arg);
    242 static void unfocus(Client *c, int setfocus);
    243 static void unmanage(Client *c, int destroyed);
    244 static void unmapnotify(XEvent *e);
    245 static void updatebarpos(Monitor *m);
    246 static void updatebars(void);
    247 static void updateclientlist(void);
    248 static int updategeom(void);
    249 static void updatenumlockmask(void);
    250 static void updatesizehints(Client *c);
    251 static void updatestatus(void);
    252 static void updatesystray(void);
    253 static void updatesystrayicongeom(Client *i, int w, int h);
    254 static void updatesystrayiconstate(Client *i, XPropertyEvent *ev);
    255 static void updatetitle(Client *c);
    256 static void updatewindowtype(Client *c);
    257 static void updatewmhints(Client *c);
    258 static void view(const Arg *arg);
    259 static Client *wintoclient(Window w);
    260 static Monitor *wintomon(Window w);
    261 static Client *wintosystrayicon(Window w);
    262 static int xerror(Display *dpy, XErrorEvent *ee);
    263 static int xerrordummy(Display *dpy, XErrorEvent *ee);
    264 static int xerrorstart(Display *dpy, XErrorEvent *ee);
    265 static void zoom(const Arg *arg);
    266 
    267 /* variables */
    268 static Systray *systray = NULL;
    269 static const char broken[] = "broken";
    270 static char stext[512];
    271 static int screen;
    272 static int sw, sh;           /* X display screen geometry width, height */
    273 static int bh;               /* bar height */
    274 static int lrpad;            /* sum of left and right padding for text */
    275 static int (*xerrorxlib)(Display *, XErrorEvent *);
    276 static unsigned int numlockmask = 0;
    277 static void (*handler[LASTEvent]) (XEvent *) = {
    278 	[ButtonPress] = buttonpress,
    279 	[ClientMessage] = clientmessage,
    280 	[ConfigureRequest] = configurerequest,
    281 	[ConfigureNotify] = configurenotify,
    282 	[DestroyNotify] = destroynotify,
    283 	[EnterNotify] = enternotify,
    284 	[Expose] = expose,
    285 	[FocusIn] = focusin,
    286 	[KeyPress] = keypress,
    287 	[MappingNotify] = mappingnotify,
    288 	[MapRequest] = maprequest,
    289 	[MotionNotify] = motionnotify,
    290 	[PropertyNotify] = propertynotify,
    291     [ResizeRequest] = resizerequest,
    292 	[UnmapNotify] = unmapnotify
    293 };
    294 static Atom wmatom[WMLast], netatom[NetLast], xatom[XLast];
    295 static int running = 1;
    296 static Cur *cursor[CurLast];
    297 static Clr **scheme;
    298 static Clr barclrs[256];
    299 static Display *dpy;
    300 static Drw *drw;
    301 static Monitor *mons, *selmon;
    302 static Window root, wmcheckwin;
    303 
    304 /* configuration, allows nested code to access above variables */
    305 #include "config.h"
    306 
    307 /* compile-time check if all tags fit into an unsigned int bit array. */
    308 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
    309 
    310 /* function implementations */
    311 void
    312 applyrules(Client *c)
    313 {
    314 	const char *class, *instance;
    315 	unsigned int i;
    316 	const Rule *r;
    317 	Monitor *m;
    318 	XClassHint ch = { NULL, NULL };
    319 
    320 	/* rule matching */
    321 	c->isfloating = 0;
    322 	c->tags = 0;
    323 	XGetClassHint(dpy, c->win, &ch);
    324 	class    = ch.res_class ? ch.res_class : broken;
    325 	instance = ch.res_name  ? ch.res_name  : broken;
    326 
    327 	for (i = 0; i < LENGTH(rules); i++) {
    328 		r = &rules[i];
    329 		if ((!r->title || strstr(c->name, r->title))
    330 		&& (!r->class || strstr(class, r->class))
    331 		&& (!r->instance || strstr(instance, r->instance)))
    332 		{
    333 			c->isfloating = r->isfloating;
    334 			c->tags |= r->tags;
    335 			for (m = mons; m && m->num != r->monitor; m = m->next);
    336 			if (m)
    337 				c->mon = m;
    338 		}
    339 	}
    340 	if (ch.res_class)
    341 		XFree(ch.res_class);
    342 	if (ch.res_name)
    343 		XFree(ch.res_name);
    344 	c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
    345 }
    346 
    347 int
    348 applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact)
    349 {
    350 	int baseismin;
    351 	Monitor *m = c->mon;
    352 
    353 	/* set minimum possible */
    354 	*w = MAX(1, *w);
    355 	*h = MAX(1, *h);
    356 	if (interact) {
    357 		if (*x > sw)
    358 			*x = sw - WIDTH(c);
    359 		if (*y > sh)
    360 			*y = sh - HEIGHT(c);
    361 		if (*x + *w + 2 * c->bw < 0)
    362 			*x = 0;
    363 		if (*y + *h + 2 * c->bw < 0)
    364 			*y = 0;
    365 	} else {
    366 		if (*x >= m->wx + m->ww)
    367 			*x = m->wx + m->ww - WIDTH(c);
    368 		if (*y >= m->wy + m->wh)
    369 			*y = m->wy + m->wh - HEIGHT(c);
    370 		if (*x + *w + 2 * c->bw <= m->wx)
    371 			*x = m->wx;
    372 		if (*y + *h + 2 * c->bw <= m->wy)
    373 			*y = m->wy;
    374 	}
    375 	if (*h < bh)
    376 		*h = bh;
    377 	if (*w < bh)
    378 		*w = bh;
    379 	if (resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
    380 		if (!c->hintsvalid)
    381 			updatesizehints(c);
    382 		/* see last two sentences in ICCCM 4.1.2.3 */
    383 		baseismin = c->basew == c->minw && c->baseh == c->minh;
    384 		if (!baseismin) { /* temporarily remove base dimensions */
    385 			*w -= c->basew;
    386 			*h -= c->baseh;
    387 		}
    388 		/* adjust for aspect limits */
    389 		if (c->mina > 0 && c->maxa > 0) {
    390 			if (c->maxa < (float)*w / *h)
    391 				*w = *h * c->maxa + 0.5;
    392 			else if (c->mina < (float)*h / *w)
    393 				*h = *w * c->mina + 0.5;
    394 		}
    395 		if (baseismin) { /* increment calculation requires this */
    396 			*w -= c->basew;
    397 			*h -= c->baseh;
    398 		}
    399 		/* adjust for increment value */
    400 		if (c->incw)
    401 			*w -= *w % c->incw;
    402 		if (c->inch)
    403 			*h -= *h % c->inch;
    404 		/* restore base dimensions */
    405 		*w = MAX(*w + c->basew, c->minw);
    406 		*h = MAX(*h + c->baseh, c->minh);
    407 		if (c->maxw)
    408 			*w = MIN(*w, c->maxw);
    409 		if (c->maxh)
    410 			*h = MIN(*h, c->maxh);
    411 	}
    412 	return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
    413 }
    414 
    415 void
    416 arrange(Monitor *m)
    417 {
    418 	if (m)
    419 		showhide(m->stack);
    420 	else for (m = mons; m; m = m->next)
    421 		showhide(m->stack);
    422 	if (m) {
    423 		arrangemon(m);
    424 		restack(m);
    425 	} else for (m = mons; m; m = m->next)
    426 		arrangemon(m);
    427 }
    428 
    429 void
    430 arrangemon(Monitor *m)
    431 {
    432 	strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
    433 	if (m->lt[m->sellt]->arrange)
    434 		m->lt[m->sellt]->arrange(m);
    435 }
    436 
    437 void
    438 attach(Client *c)
    439 {
    440 	c->next = c->mon->clients;
    441 	c->mon->clients = c;
    442 }
    443 
    444 void
    445 attachstack(Client *c)
    446 {
    447 	c->snext = c->mon->stack;
    448 	c->mon->stack = c;
    449 }
    450 
    451 void
    452 buttonpress(XEvent *e)
    453 {
    454 	unsigned int i, x, click;
    455 	Arg arg = {0};
    456 	Client *c;
    457 	Monitor *m;
    458 	XButtonPressedEvent *ev = &e->xbutton;
    459 
    460 	click = ClkRootWin;
    461 	/* focus monitor if necessary */
    462 	if ((m = wintomon(ev->window)) && m != selmon) {
    463 		unfocus(selmon->sel, 1);
    464 		selmon = m;
    465 		focus(NULL);
    466 	}
    467 	if (ev->window == selmon->barwin) {
    468 		i = x = 0;
    469 		do
    470 			x += TEXTW(tags[i]);
    471 		while (ev->x >= x && ++i < LENGTH(tags));
    472 		if (i < LENGTH(tags)) {
    473 			click = ClkTagBar;
    474 			arg.ui = 1 << i;
    475 		} else if (ev->x < x + TEXTW(selmon->ltsymbol))
    476 			click = ClkLtSymbol;
    477 		else if (ev->x > selmon->ww - (int)TEXTW(stext) - getsystraywidth())
    478 			click = ClkStatusText;
    479 		else
    480 			click = ClkWinTitle;
    481 	} else if ((c = wintoclient(ev->window))) {
    482 		focus(c);
    483 		restack(selmon);
    484 		XAllowEvents(dpy, ReplayPointer, CurrentTime);
    485 		click = ClkClientWin;
    486 	}
    487 	for (i = 0; i < LENGTH(buttons); i++)
    488 		if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
    489 		&& CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
    490 			buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
    491 }
    492 
    493 void
    494 checkotherwm(void)
    495 {
    496 	xerrorxlib = XSetErrorHandler(xerrorstart);
    497 	/* this causes an error if some other window manager is running */
    498 	XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
    499 	XSync(dpy, False);
    500 	XSetErrorHandler(xerror);
    501 	XSync(dpy, False);
    502 }
    503 
    504 void
    505 cleanup(void)
    506 {
    507 	Arg a = {.ui = ~0};
    508 	Layout foo = { "", NULL };
    509 	Monitor *m;
    510 	size_t i;
    511 
    512 	view(&a);
    513 	selmon->lt[selmon->sellt] = &foo;
    514 	for (m = mons; m; m = m->next)
    515 		while (m->stack)
    516 			unmanage(m->stack, 0);
    517 	XUngrabKey(dpy, AnyKey, AnyModifier, root);
    518 	while (mons)
    519 		cleanupmon(mons);
    520 
    521 	if (showsystray) {
    522 		XUnmapWindow(dpy, systray->win);
    523 		XDestroyWindow(dpy, systray->win);
    524 		free(systray);
    525 	}
    526 
    527     for (i = 0; i < CurLast; i++)
    528 		drw_cur_free(drw, cursor[i]);
    529 	for (i = 0; i < LENGTH(colors); i++)
    530 		free(scheme[i]);
    531 	free(scheme);
    532 	XDestroyWindow(dpy, wmcheckwin);
    533 	drw_free(drw);
    534 	XSync(dpy, False);
    535 	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
    536 	XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
    537 }
    538 
    539 void
    540 cleanupmon(Monitor *mon)
    541 {
    542 	Monitor *m;
    543 
    544 	if (mon == mons)
    545 		mons = mons->next;
    546 	else {
    547 		for (m = mons; m && m->next != mon; m = m->next);
    548 		m->next = mon->next;
    549 	}
    550 	XUnmapWindow(dpy, mon->barwin);
    551 	XDestroyWindow(dpy, mon->barwin);
    552 	free(mon);
    553 }
    554 
    555 void
    556 clientmessage(XEvent *e)
    557 {
    558 	XWindowAttributes wa;
    559 	XSetWindowAttributes swa;
    560 	XClientMessageEvent *cme = &e->xclient;
    561 	Client *c = wintoclient(cme->window);
    562 
    563 	if (showsystray && cme->window == systray->win && cme->message_type == netatom[NetSystemTrayOP]) {
    564 		/* add systray icons */
    565 		if (cme->data.l[1] == SYSTEM_TRAY_REQUEST_DOCK) {
    566 			if (!(c = (Client *)calloc(1, sizeof(Client))))
    567 				die("fatal: could not malloc() %u bytes\n", sizeof(Client));
    568 			if (!(c->win = cme->data.l[2])) {
    569 				free(c);
    570 				return;
    571 			}
    572 			c->mon = selmon;
    573 			c->next = systray->icons;
    574 			systray->icons = c;
    575 			if (!XGetWindowAttributes(dpy, c->win, &wa)) {
    576 				/* use sane defaults */
    577 				wa.width = bh;
    578 				wa.height = bh;
    579 				wa.border_width = 0;
    580 			}
    581 			c->x = c->oldx = c->y = c->oldy = 0;
    582 			c->w = c->oldw = wa.width;
    583 			c->h = c->oldh = wa.height;
    584 			c->oldbw = wa.border_width;
    585 			c->bw = 0;
    586 			c->isfloating = True;
    587 			/* reuse tags field as mapped status */
    588 			c->tags = 1;
    589 			updatesizehints(c);
    590 			updatesystrayicongeom(c, wa.width, wa.height);
    591 			XAddToSaveSet(dpy, c->win);
    592 			XSelectInput(dpy, c->win, StructureNotifyMask | PropertyChangeMask | ResizeRedirectMask);
    593 			XReparentWindow(dpy, c->win, systray->win, 0, 0);
    594 			/* use parents background color */
    595 			swa.background_pixel  = scheme[SchemeNorm][ColBg].pixel;
    596 			XChangeWindowAttributes(dpy, c->win, CWBackPixel, &swa);
    597 			sendevent(c->win, netatom[Xembed], StructureNotifyMask, CurrentTime, XEMBED_EMBEDDED_NOTIFY, 0 , systray->win, XEMBED_EMBEDDED_VERSION);
    598 			/* FIXME not sure if I have to send these events, too */
    599 			sendevent(c->win, netatom[Xembed], StructureNotifyMask, CurrentTime, XEMBED_FOCUS_IN, 0 , systray->win, XEMBED_EMBEDDED_VERSION);
    600 			sendevent(c->win, netatom[Xembed], StructureNotifyMask, CurrentTime, XEMBED_WINDOW_ACTIVATE, 0 , systray->win, XEMBED_EMBEDDED_VERSION);
    601 			sendevent(c->win, netatom[Xembed], StructureNotifyMask, CurrentTime, XEMBED_MODALITY_ON, 0 , systray->win, XEMBED_EMBEDDED_VERSION);
    602 			XSync(dpy, False);
    603 			resizebarwin(selmon);
    604 			updatesystray();
    605 			setclientstate(c, NormalState);
    606 		}
    607 		return;
    608 	}
    609 
    610 	if (!c)
    611 		return;
    612 	if (cme->message_type == netatom[NetWMState]) {
    613 		if (cme->data.l[1] == netatom[NetWMFullscreen]
    614 		|| cme->data.l[2] == netatom[NetWMFullscreen])
    615 			setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
    616 				|| (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
    617 	} else if (cme->message_type == netatom[NetActiveWindow]) {
    618 		if (c != selmon->sel && !c->isurgent)
    619 			seturgent(c, 1);
    620 	}
    621 }
    622 
    623 void
    624 configure(Client *c)
    625 {
    626 	XConfigureEvent ce;
    627 
    628 	ce.type = ConfigureNotify;
    629 	ce.display = dpy;
    630 	ce.event = c->win;
    631 	ce.window = c->win;
    632 	ce.x = c->x;
    633 	ce.y = c->y;
    634 	ce.width = c->w;
    635 	ce.height = c->h;
    636 	ce.border_width = c->bw;
    637 	ce.above = None;
    638 	ce.override_redirect = False;
    639 	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
    640 }
    641 
    642 void
    643 configurenotify(XEvent *e)
    644 {
    645 	Monitor *m;
    646 	Client *c;
    647 	XConfigureEvent *ev = &e->xconfigure;
    648 	int dirty;
    649 
    650 	/* TODO: updategeom handling sucks, needs to be simplified */
    651 	if (ev->window == root) {
    652 		dirty = (sw != ev->width || sh != ev->height);
    653 		sw = ev->width;
    654 		sh = ev->height;
    655 		if (updategeom() || dirty) {
    656 			drw_resize(drw, sw, bh);
    657 			updatebars();
    658 			for (m = mons; m; m = m->next) {
    659 				for (c = m->clients; c; c = c->next)
    660 					if (c->isfullscreen)
    661 						resizeclient(c, m->mx, m->my, m->mw, m->mh);
    662 				resizebarwin(m);
    663 			}
    664 			focus(NULL);
    665 			arrange(NULL);
    666 		}
    667 	}
    668 }
    669 
    670 void
    671 configurerequest(XEvent *e)
    672 {
    673 	Client *c;
    674 	Monitor *m;
    675 	XConfigureRequestEvent *ev = &e->xconfigurerequest;
    676 	XWindowChanges wc;
    677 
    678 	if ((c = wintoclient(ev->window))) {
    679 		if (ev->value_mask & CWBorderWidth)
    680 			c->bw = ev->border_width;
    681 		else if (c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
    682 			m = c->mon;
    683 			if (ev->value_mask & CWX) {
    684 				c->oldx = c->x;
    685 				c->x = m->mx + ev->x;
    686 			}
    687 			if (ev->value_mask & CWY) {
    688 				c->oldy = c->y;
    689 				c->y = m->my + ev->y;
    690 			}
    691 			if (ev->value_mask & CWWidth) {
    692 				c->oldw = c->w;
    693 				c->w = ev->width;
    694 			}
    695 			if (ev->value_mask & CWHeight) {
    696 				c->oldh = c->h;
    697 				c->h = ev->height;
    698 			}
    699 			if ((c->x + c->w) > m->mx + m->mw && c->isfloating)
    700 				c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
    701 			if ((c->y + c->h) > m->my + m->mh && c->isfloating)
    702 				c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
    703 			if ((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
    704 				configure(c);
    705 			if (ISVISIBLE(c))
    706 				XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
    707 		} else
    708 			configure(c);
    709 	} else {
    710 		wc.x = ev->x;
    711 		wc.y = ev->y;
    712 		wc.width = ev->width;
    713 		wc.height = ev->height;
    714 		wc.border_width = ev->border_width;
    715 		wc.sibling = ev->above;
    716 		wc.stack_mode = ev->detail;
    717 		XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
    718 	}
    719 	XSync(dpy, False);
    720 }
    721 
    722 Monitor *
    723 createmon(void)
    724 {
    725 	Monitor *m;
    726 
    727 	m = ecalloc(1, sizeof(Monitor));
    728 	m->tagset[0] = m->tagset[1] = 1;
    729 	m->mfact = mfact;
    730 	m->nmaster = nmaster;
    731 	m->showbar = showbar;
    732 	m->topbar = topbar;
    733 	m->lt[0] = &layouts[0];
    734 	m->lt[1] = &layouts[1 % LENGTH(layouts)];
    735 	strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
    736 	return m;
    737 }
    738 
    739 void
    740 destroynotify(XEvent *e)
    741 {
    742 	Client *c;
    743 	XDestroyWindowEvent *ev = &e->xdestroywindow;
    744 
    745 	if ((c = wintoclient(ev->window)))
    746 		unmanage(c, 1);
    747 	else if ((c = wintosystrayicon(ev->window))) {
    748 		removesystrayicon(c);
    749 		resizebarwin(selmon);
    750 		updatesystray();
    751 	}
    752 }
    753 
    754 void
    755 detach(Client *c)
    756 {
    757 	Client **tc;
    758 
    759 	for (tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
    760 	*tc = c->next;
    761 }
    762 
    763 void
    764 detachstack(Client *c)
    765 {
    766 	Client **tc, *t;
    767 
    768 	for (tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
    769 	*tc = c->snext;
    770 
    771 	if (c == c->mon->sel) {
    772 		for (t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
    773 		c->mon->sel = t;
    774 	}
    775 }
    776 
    777 Monitor *
    778 dirtomon(int dir)
    779 {
    780 	Monitor *m = NULL;
    781 
    782 	if (dir > 0) {
    783 		if (!(m = selmon->next))
    784 			m = mons;
    785 	} else if (selmon == mons)
    786 		for (m = mons; m->next; m = m->next);
    787 	else
    788 		for (m = mons; m->next != selmon; m = m->next);
    789 	return m;
    790 }
    791 
    792 void
    793 resetfntlist(Fnt *orighead, Fnt *curhead)
    794 {
    795 	if (orighead != curhead) {
    796 		Fnt *f;
    797 		for (f = orighead; f->next; f = f->next);
    798 		f->next = curhead;
    799 		for (f = f->next; f->next != orighead; f = f->next);
    800 		f->next = NULL;
    801 	}
    802 }
    803 
    804 enum SgrFlags {
    805 	REVERSE = 1 << 0,
    806 	UNDERLINE = 1 << 1,
    807 	STRIKETHROUGH = 1 << 2,
    808 	OVERLINE = 1 << 3
    809 };
    810 
    811 void
    812 drawbar(Monitor *m)
    813 {
    814 	int x, w, tw = 0, stw = 0;
    815 	int boxs = drw->fonts->h / 9;
    816 	int boxw = drw->fonts->h / 6 + 2;
    817 	unsigned int i, occ = 0, urg = 0;
    818 	Client *c;
    819 
    820 	if (!m->showbar)
    821 		return;
    822 
    823 	if(showsystray && m == systraytomon(m) && !systrayonleft)
    824 		stw = getsystraywidth();
    825 
    826 	/* draw status first so it can be overdrawn by tags later */
    827 	if (m == selmon) { /* status is only drawn on selected monitor */
    828 		char buffer[sizeof(stext)];
    829 		Clr scm[3];
    830 		int wr, rd;
    831 		int pw;
    832 		int fg = 7;
    833 		int bg = 0;
    834 		int fmt = 0;
    835 		int lp = lrpad / 2 - 2;
    836 		Fnt *fset = drw->fonts;
    837 
    838 		memcpy(scm, scheme[SchemeNorm], sizeof(scm));
    839 
    840 		drw_setscheme(drw, scm);
    841 
    842 		for (tw = 0, wr = 0, rd = 0; stext[rd]; rd++) {
    843 			if (stext[rd] == '\033' && stext[rd + 1] == '[') {
    844 				size_t alen = strspn(stext + rd + 2,
    845 						     "0123456789;");
    846 				if (stext[rd + alen + 2] == 'm') {
    847 					if (wr) {
    848 						buffer[wr] = '\0';
    849 						tw += TEXTW(buffer) - lrpad;
    850 						wr = 0;
    851 					}
    852 
    853 					char *ep = stext + rd + 1;
    854 					while (*ep != 'm') {
    855 						unsigned v = strtoul(ep + 1, &ep, 10);
    856 						if (v == 0 || (v >= 10 && v <= 19)) {
    857 							int fi = v % 10;
    858 							Fnt *f;
    859 							Fnt *p;
    860 							resetfntlist(fset, drw->fonts);
    861 							for (p = NULL, f = fset; f && fi--; p = f, f = f->next);
    862 							if (f) {
    863 								if (p) {
    864 									p->next = NULL;
    865 									for (p = f; p->next; p = p->next);
    866 									p->next = fset;
    867 								}
    868 								drw_setfontset(drw, f);
    869 							} else {
    870 								drw_setfontset(drw, fset);
    871 							}
    872 						} else if (v == 48 || v == 38) {
    873 							break;
    874 						}
    875 					}
    876 
    877 					rd += alen + 2;
    878 					continue;
    879 				}
    880 			}
    881 			buffer[wr++] = stext[rd];
    882 		}
    883 		buffer[wr] = '\0';
    884 
    885 		tw += TEXTW(buffer) - lrpad / 2 + 2;
    886 		x = m->ww - tw - stw;
    887 
    888 		resetfntlist(fset, drw->fonts);
    889 		drw_setfontset(drw, fset);
    890 
    891 		for (wr = 0, rd = 0; stext[rd]; rd++) {
    892 			if (stext[rd] == '' && stext[rd + 1] == '[') {
    893 				size_t alen = strspn(stext + rd + 2,
    894 						     "0123456789;");
    895 				if (stext[rd + alen + 2] == 'm') {
    896 					if (wr) {
    897 						buffer[wr] = '\0';
    898 						pw = TEXTW(buffer) - lrpad + lp;
    899 						drw_text(drw, x, 0, pw, bh, lp, buffer, fmt & REVERSE);
    900 						if (fmt & UNDERLINE)
    901 							drw_rect(drw, x, (bh + drw->fonts->h) / 2, pw, 1, 1, fmt & REVERSE);
    902 						if (fmt & STRIKETHROUGH)
    903 							drw_rect(drw, x, bh / 2, pw, 1, 1, fmt & REVERSE);
    904 						if (fmt & OVERLINE)
    905 							drw_rect(drw, x, (bh - drw->fonts->h) / 2, pw, 1, 1, fmt & REVERSE);
    906 						x += pw;
    907 						lp = 0;
    908 					}
    909 
    910 					char *ep = stext + rd + 1;
    911 					int ignore = 0;
    912 					int bgfg = 0;
    913 					while (*ep != 'm') {
    914 						unsigned v = strtoul(ep + 1, &ep, 10);
    915 						if (ignore)
    916 							continue;
    917 						if (bgfg) {
    918 							if (bgfg < 4 && v == 5) {
    919 								bgfg <<= 1;
    920 								continue;
    921 							}
    922 							if (bgfg == 4)
    923 								scm[0] = barclrs[fg = v];
    924 							else if (bgfg == 6)
    925 								scm[1] = barclrs[bg = v];
    926 							ignore = 1;
    927 
    928 							continue;
    929 						}
    930 						if (v == 0) {
    931 							memcpy(scm, scheme[SchemeNorm], sizeof(scm));
    932 							fg = 7;
    933 							bg = 0;
    934 							fmt = 0;
    935 							resetfntlist(fset, drw->fonts);
    936 							drw_setfontset(drw, fset);
    937 						} else if (v == 1) {
    938 							fg |= 8;
    939 							scm[0] = barclrs[fg];
    940 						} else if (v == 4) {
    941 							fmt |= UNDERLINE;
    942 						} else if (v == 7) {
    943 							fmt |= REVERSE;
    944 						} else if (v == 9) {
    945 							fmt |= STRIKETHROUGH;
    946 						} else if (v >= 10 && v <= 19) {
    947 							int fi = v % 10;
    948 							Fnt *f;
    949 							Fnt *p;
    950 							resetfntlist(fset, drw->fonts);
    951 							for (p = NULL, f = fset; f && fi--; p = f, f = f->next);
    952 							if (f) {
    953 								if (p) {
    954 									p->next = NULL;
    955 									for (p = f; p->next; p = p->next);
    956 									p->next = fset;
    957 								}
    958 								drw_setfontset(drw, f);
    959 							} else {
    960 								drw_setfontset(drw, fset);
    961 							}
    962 						} else if (v == 22) {
    963 							fg &= ~8;
    964 							scm[0] = barclrs[fg];
    965 						} else if (v == 24) {
    966 							fmt &= ~UNDERLINE;
    967 						} else if (v == 27) {
    968 							fmt &= ~REVERSE;
    969 						} else if (v == 29) {
    970 							fmt &= ~STRIKETHROUGH;
    971 						} else if (v >= 30 && v <= 37) {
    972 							fg = v % 10 | (fg & 8);
    973 							scm[0] = barclrs[fg];
    974 						} else if (v == 38) {
    975 							bgfg = 2;
    976 						} else if (v >= 40 && v <= 47) {
    977 							bg = v % 10;
    978 							scm[1] = barclrs[bg];
    979 						} else if (v == 48) {
    980 							bgfg = 3;
    981 						} else if (v == 53) {
    982 							fmt |= OVERLINE;
    983 						} else if (v == 55) {
    984 							fmt &= ~OVERLINE;
    985 						}
    986 					}
    987 
    988 					rd += alen + 2;
    989 					wr = 0;
    990 
    991 					drw_setscheme(drw, scm);
    992 					continue;
    993 				}
    994 			}
    995 			buffer[wr++] = stext[rd];
    996 		}
    997 
    998 		buffer[wr] = '\0';
    999 		pw = TEXTW(buffer) - lrpad + lp + (lrpad & 1);
   1000 		drw_text(drw, x, 0, pw + 4, bh, lp, buffer, fmt & REVERSE);
   1001 		if (fmt & UNDERLINE)
   1002 			drw_rect(drw, x, (bh + drw->fonts->h) / 2, pw, 1, 1, fmt & REVERSE);
   1003 		if (fmt & STRIKETHROUGH)
   1004 			drw_rect(drw, x, bh / 2, pw, 1, 1, fmt & REVERSE);
   1005 		if (fmt & OVERLINE)
   1006 			drw_rect(drw, x, (bh - drw->fonts->h) / 2, pw, 1, 1, fmt & REVERSE);
   1007 
   1008 		resetfntlist(fset, drw->fonts);
   1009 		drw_setscheme(drw, scheme[SchemeNorm]);
   1010 	}
   1011 
   1012 	resizebarwin(m);
   1013 	for (c = m->clients; c; c = c->next) {
   1014 		occ |= c->tags;
   1015 		if (c->isurgent)
   1016 			urg |= c->tags;
   1017 	}
   1018 	x = 0;
   1019 	for (i = 0; i < LENGTH(tags); i++) {
   1020 		w = TEXTW(tags[i]);
   1021 		drw_setscheme(drw, scheme[m->tagset[m->seltags] & 1 << i ? SchemeSel : SchemeNorm]);
   1022 		drw_text(drw, x, 0, w, bh, lrpad / 2, tags[i], urg & 1 << i);
   1023 		if (occ & 1 << i)
   1024 			drw_rect(drw, x + boxs, boxs, boxw, boxw,
   1025 				m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
   1026 				urg & 1 << i);
   1027 		x += w;
   1028 	}
   1029 	w = TEXTW(m->ltsymbol);
   1030 	drw_setscheme(drw, scheme[SchemeNorm]);
   1031 	x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
   1032 
   1033 	if ((w = m->ww - tw - stw - x) > bh) {
   1034 		if (m->sel) {
   1035 			drw_setscheme(drw, scheme[m == selmon ? SchemeSel : SchemeNorm]);
   1036 			drw_text(drw, x, 0, w, bh, lrpad / 2, m->sel->name, 0);
   1037 			if (m->sel->isfloating)
   1038 				drw_rect(drw, x + boxs, boxs, boxw, boxw, m->sel->isfixed, 0);
   1039 		} else {
   1040 			drw_setscheme(drw, scheme[SchemeNorm]);
   1041 			drw_rect(drw, x, 0, w, bh, 1, 1);
   1042 		}
   1043 	}
   1044 	drw_map(drw, m->barwin, 0, 0, m->ww - stw, bh);
   1045 }
   1046 
   1047 void
   1048 drawbars(void)
   1049 {
   1050 	Monitor *m;
   1051 
   1052 	for (m = mons; m; m = m->next)
   1053 		drawbar(m);
   1054 }
   1055 
   1056 void
   1057 enternotify(XEvent *e)
   1058 {
   1059 	Client *c;
   1060 	Monitor *m;
   1061 	XCrossingEvent *ev = &e->xcrossing;
   1062 
   1063 	if ((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
   1064 		return;
   1065 	c = wintoclient(ev->window);
   1066 	m = c ? c->mon : wintomon(ev->window);
   1067 	if (m != selmon) {
   1068 		unfocus(selmon->sel, 1);
   1069 		selmon = m;
   1070 	} else if (!c || c == selmon->sel)
   1071 		return;
   1072 	focus(c);
   1073 }
   1074 
   1075 void
   1076 expose(XEvent *e)
   1077 {
   1078 	Monitor *m;
   1079 	XExposeEvent *ev = &e->xexpose;
   1080 
   1081 	if (ev->count == 0 && (m = wintomon(ev->window))) {
   1082 		drawbar(m);
   1083 		if (m == selmon)
   1084 			updatesystray();
   1085 	}
   1086 }
   1087 
   1088 void
   1089 focus(Client *c)
   1090 {
   1091 	if (!c || !ISVISIBLE(c))
   1092 		for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
   1093 	if (selmon->sel && selmon->sel != c)
   1094 		unfocus(selmon->sel, 0);
   1095 	if (c) {
   1096 		if (c->mon != selmon)
   1097 			selmon = c->mon;
   1098 		if (c->isurgent)
   1099 			seturgent(c, 0);
   1100 		detachstack(c);
   1101 		attachstack(c);
   1102 		grabbuttons(c, 1);
   1103 		XSetWindowBorder(dpy, c->win, scheme[SchemeSel][ColBorder].pixel);
   1104 		setfocus(c);
   1105 	} else {
   1106 		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
   1107 		XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
   1108 	}
   1109 	selmon->sel = c;
   1110 	drawbars();
   1111 }
   1112 
   1113 /* there are some broken focus acquiring clients needing extra handling */
   1114 void
   1115 focusin(XEvent *e)
   1116 {
   1117 	XFocusChangeEvent *ev = &e->xfocus;
   1118 
   1119 	if (selmon->sel && ev->window != selmon->sel->win)
   1120 		setfocus(selmon->sel);
   1121 }
   1122 
   1123 void
   1124 focusmon(const Arg *arg)
   1125 {
   1126 	Monitor *m;
   1127 
   1128 	if (!mons->next)
   1129 		return;
   1130 	if ((m = dirtomon(arg->i)) == selmon)
   1131 		return;
   1132 	unfocus(selmon->sel, 0);
   1133 	selmon = m;
   1134 	focus(NULL);
   1135 }
   1136 
   1137 void
   1138 focusstack(const Arg *arg)
   1139 {
   1140 	Client *c = NULL, *i;
   1141 
   1142 	if (!selmon->sel || (selmon->sel->isfullscreen && lockfullscreen))
   1143 		return;
   1144 	if (arg->i > 0) {
   1145 		for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
   1146 		if (!c)
   1147 			for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
   1148 	} else {
   1149 		for (i = selmon->clients; i != selmon->sel; i = i->next)
   1150 			if (ISVISIBLE(i))
   1151 				c = i;
   1152 		if (!c)
   1153 			for (; i; i = i->next)
   1154 				if (ISVISIBLE(i))
   1155 					c = i;
   1156 	}
   1157 	if (c) {
   1158 		focus(c);
   1159 		restack(selmon);
   1160 	}
   1161 }
   1162 
   1163 Atom
   1164 getatomprop(Client *c, Atom prop)
   1165 {
   1166 	int di;
   1167 	unsigned long dl;
   1168 	unsigned char *p = NULL;
   1169 	Atom da, atom = None;
   1170 
   1171 	/* FIXME getatomprop should return the number of items and a pointer to
   1172 	 * the stored data instead of this workaround */
   1173 	Atom req = XA_ATOM;
   1174 	if (prop == xatom[XembedInfo])
   1175 		req = xatom[XembedInfo];
   1176 
   1177 	if (XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, req,
   1178 		&da, &di, &dl, &dl, &p) == Success && p) {
   1179 		atom = *(Atom *)p;
   1180 		if (da == xatom[XembedInfo] && dl == 2)
   1181 			atom = ((Atom *)p)[1];
   1182 		XFree(p);
   1183 	}
   1184 	return atom;
   1185 }
   1186 
   1187 int
   1188 getrootptr(int *x, int *y)
   1189 {
   1190 	int di;
   1191 	unsigned int dui;
   1192 	Window dummy;
   1193 
   1194 	return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
   1195 }
   1196 
   1197 long
   1198 getstate(Window w)
   1199 {
   1200 	int format;
   1201 	long result = -1;
   1202 	unsigned char *p = NULL;
   1203 	unsigned long n, extra;
   1204 	Atom real;
   1205 
   1206 	if (XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
   1207 		&real, &format, &n, &extra, (unsigned char **)&p) != Success)
   1208 		return -1;
   1209 	if (n != 0)
   1210 		result = *p;
   1211 	XFree(p);
   1212 	return result;
   1213 }
   1214 
   1215 unsigned int
   1216 getsystraywidth()
   1217 {
   1218 	unsigned int w = 0;
   1219 	Client *i;
   1220 	if(showsystray)
   1221 		for(i = systray->icons; i; w += i->w + systrayspacing, i = i->next) ;
   1222 	return w ? w + systrayspacing : 1;
   1223 }
   1224 
   1225 int
   1226 gettextprop(Window w, Atom atom, char *text, unsigned int size)
   1227 {
   1228 	char **list = NULL;
   1229 	int n;
   1230 	XTextProperty name;
   1231 
   1232 	if (!text || size == 0)
   1233 		return 0;
   1234 	text[0] = '\0';
   1235 	if (!XGetTextProperty(dpy, w, &name, atom) || !name.nitems)
   1236 		return 0;
   1237 	if (name.encoding == XA_STRING) {
   1238 		strncpy(text, (char *)name.value, size - 1);
   1239 	} else if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
   1240 		strncpy(text, *list, size - 1);
   1241 		XFreeStringList(list);
   1242 	}
   1243 	text[size - 1] = '\0';
   1244 	XFree(name.value);
   1245 	return 1;
   1246 }
   1247 
   1248 void
   1249 grabbuttons(Client *c, int focused)
   1250 {
   1251 	updatenumlockmask();
   1252 	{
   1253 		unsigned int i, j;
   1254 		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
   1255 		XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
   1256 		if (!focused)
   1257 			XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
   1258 				BUTTONMASK, GrabModeSync, GrabModeSync, None, None);
   1259 		for (i = 0; i < LENGTH(buttons); i++)
   1260 			if (buttons[i].click == ClkClientWin)
   1261 				for (j = 0; j < LENGTH(modifiers); j++)
   1262 					XGrabButton(dpy, buttons[i].button,
   1263 						buttons[i].mask | modifiers[j],
   1264 						c->win, False, BUTTONMASK,
   1265 						GrabModeAsync, GrabModeSync, None, None);
   1266 	}
   1267 }
   1268 
   1269 void
   1270 grabkeys(void)
   1271 {
   1272 	updatenumlockmask();
   1273 	{
   1274 		unsigned int i, j, k;
   1275 		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
   1276 		int start, end, skip;
   1277 		KeySym *syms;
   1278 
   1279 		XUngrabKey(dpy, AnyKey, AnyModifier, root);
   1280 		XDisplayKeycodes(dpy, &start, &end);
   1281 		syms = XGetKeyboardMapping(dpy, start, end - start + 1, &skip);
   1282 		if (!syms)
   1283 			return;
   1284 		for (k = start; k <= end; k++)
   1285 			for (i = 0; i < LENGTH(keys); i++)
   1286 				/* skip modifier codes, we do that ourselves */
   1287 				if (keys[i].keysym == syms[(k - start) * skip])
   1288 					for (j = 0; j < LENGTH(modifiers); j++)
   1289 						XGrabKey(dpy, k,
   1290 							 keys[i].mod | modifiers[j],
   1291 							 root, True,
   1292 							 GrabModeAsync, GrabModeAsync);
   1293 		XFree(syms);
   1294 	}
   1295 }
   1296 
   1297 void
   1298 incnmaster(const Arg *arg)
   1299 {
   1300 	selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
   1301 	arrange(selmon);
   1302 }
   1303 
   1304 #ifdef XINERAMA
   1305 static int
   1306 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info)
   1307 {
   1308 	while (n--)
   1309 		if (unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
   1310 		&& unique[n].width == info->width && unique[n].height == info->height)
   1311 			return 0;
   1312 	return 1;
   1313 }
   1314 #endif /* XINERAMA */
   1315 
   1316 void
   1317 keypress(XEvent *e)
   1318 {
   1319 	unsigned int i;
   1320 	KeySym keysym;
   1321 	XKeyEvent *ev;
   1322 
   1323 	ev = &e->xkey;
   1324 	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
   1325 	for (i = 0; i < LENGTH(keys); i++)
   1326 		if (keysym == keys[i].keysym
   1327 		&& CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
   1328 		&& keys[i].func)
   1329 			keys[i].func(&(keys[i].arg));
   1330 }
   1331 
   1332 void
   1333 killclient(const Arg *arg)
   1334 {
   1335 	if (!selmon->sel)
   1336 		return;
   1337 
   1338 	if (!sendevent(selmon->sel->win, wmatom[WMDelete], NoEventMask, wmatom[WMDelete], CurrentTime, 0 , 0, 0)) {
   1339 		XGrabServer(dpy);
   1340 		XSetErrorHandler(xerrordummy);
   1341 		XSetCloseDownMode(dpy, DestroyAll);
   1342 		XKillClient(dpy, selmon->sel->win);
   1343 		XSync(dpy, False);
   1344 		XSetErrorHandler(xerror);
   1345 		XUngrabServer(dpy);
   1346 	}
   1347 }
   1348 
   1349 void
   1350 manage(Window w, XWindowAttributes *wa)
   1351 {
   1352 	Client *c, *t = NULL;
   1353 	Window trans = None;
   1354 	XWindowChanges wc;
   1355 
   1356 	c = ecalloc(1, sizeof(Client));
   1357 	c->win = w;
   1358 	/* geometry */
   1359 	c->x = c->oldx = wa->x;
   1360 	c->y = c->oldy = wa->y;
   1361 	c->w = c->oldw = wa->width;
   1362 	c->h = c->oldh = wa->height;
   1363 	c->oldbw = wa->border_width;
   1364 
   1365 	updatetitle(c);
   1366 	if (XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
   1367 		c->mon = t->mon;
   1368 		c->tags = t->tags;
   1369 	} else {
   1370 		c->mon = selmon;
   1371 		applyrules(c);
   1372 	}
   1373 
   1374 	if (c->x + WIDTH(c) > c->mon->wx + c->mon->ww)
   1375 		c->x = c->mon->wx + c->mon->ww - WIDTH(c);
   1376 	if (c->y + HEIGHT(c) > c->mon->wy + c->mon->wh)
   1377 		c->y = c->mon->wy + c->mon->wh - HEIGHT(c);
   1378 	c->x = MAX(c->x, c->mon->wx);
   1379 	c->y = MAX(c->y, c->mon->wy);
   1380 	c->bw = borderpx;
   1381 
   1382 	wc.border_width = c->bw;
   1383 	XConfigureWindow(dpy, w, CWBorderWidth, &wc);
   1384 	XSetWindowBorder(dpy, w, scheme[SchemeNorm][ColBorder].pixel);
   1385 	configure(c); /* propagates border_width, if size doesn't change */
   1386 	updatewindowtype(c);
   1387 	updatesizehints(c);
   1388 	updatewmhints(c);
   1389 	XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
   1390 	grabbuttons(c, 0);
   1391 	if (!c->isfloating)
   1392 		c->isfloating = c->oldstate = trans != None || c->isfixed;
   1393 	if (c->isfloating)
   1394 		XRaiseWindow(dpy, c->win);
   1395 	attach(c);
   1396 	attachstack(c);
   1397 	XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
   1398 		(unsigned char *) &(c->win), 1);
   1399 	XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
   1400 	setclientstate(c, NormalState);
   1401 	if (c->mon == selmon)
   1402 		unfocus(selmon->sel, 0);
   1403 	c->mon->sel = c;
   1404 	arrange(c->mon);
   1405 	XMapWindow(dpy, c->win);
   1406 	focus(NULL);
   1407 }
   1408 
   1409 void
   1410 mappingnotify(XEvent *e)
   1411 {
   1412 	XMappingEvent *ev = &e->xmapping;
   1413 
   1414 	XRefreshKeyboardMapping(ev);
   1415 	if (ev->request == MappingKeyboard)
   1416 		grabkeys();
   1417 }
   1418 
   1419 void
   1420 maprequest(XEvent *e)
   1421 {
   1422 	static XWindowAttributes wa;
   1423 	XMapRequestEvent *ev = &e->xmaprequest;
   1424 
   1425 	Client *i;
   1426 	if ((i = wintosystrayicon(ev->window))) {
   1427 		sendevent(i->win, netatom[Xembed], StructureNotifyMask, CurrentTime, XEMBED_WINDOW_ACTIVATE, 0, systray->win, XEMBED_EMBEDDED_VERSION);
   1428 		resizebarwin(selmon);
   1429 		updatesystray();
   1430 	}
   1431 
   1432 	if (!XGetWindowAttributes(dpy, ev->window, &wa) || wa.override_redirect)
   1433 		return;
   1434 	if (!wintoclient(ev->window))
   1435 		manage(ev->window, &wa);
   1436 }
   1437 
   1438 void
   1439 monocle(Monitor *m)
   1440 {
   1441 	unsigned int n = 0;
   1442 	Client *c;
   1443 
   1444 	for (c = m->clients; c; c = c->next)
   1445 		if (ISVISIBLE(c))
   1446 			n++;
   1447 	if (n > 0) /* override layout symbol */
   1448 		snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
   1449 	for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
   1450 		resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
   1451 }
   1452 
   1453 void
   1454 motionnotify(XEvent *e)
   1455 {
   1456 	static Monitor *mon = NULL;
   1457 	Monitor *m;
   1458 	XMotionEvent *ev = &e->xmotion;
   1459 
   1460 	if (ev->window != root)
   1461 		return;
   1462 	if ((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
   1463 		unfocus(selmon->sel, 1);
   1464 		selmon = m;
   1465 		focus(NULL);
   1466 	}
   1467 	mon = m;
   1468 }
   1469 
   1470 void
   1471 movemouse(const Arg *arg)
   1472 {
   1473 	int x, y, ocx, ocy, nx, ny;
   1474 	Client *c;
   1475 	Monitor *m;
   1476 	XEvent ev;
   1477 	Time lasttime = 0;
   1478 
   1479 	if (!(c = selmon->sel))
   1480 		return;
   1481 	if (c->isfullscreen) /* no support moving fullscreen windows by mouse */
   1482 		return;
   1483 	restack(selmon);
   1484 	ocx = c->x;
   1485 	ocy = c->y;
   1486 	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
   1487 		None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
   1488 		return;
   1489 	if (!getrootptr(&x, &y))
   1490 		return;
   1491 	do {
   1492 		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
   1493 		switch(ev.type) {
   1494 		case ConfigureRequest:
   1495 		case Expose:
   1496 		case MapRequest:
   1497 			handler[ev.type](&ev);
   1498 			break;
   1499 		case MotionNotify:
   1500 			if ((ev.xmotion.time - lasttime) <= (1000 / 60))
   1501 				continue;
   1502 			lasttime = ev.xmotion.time;
   1503 
   1504 			nx = ocx + (ev.xmotion.x - x);
   1505 			ny = ocy + (ev.xmotion.y - y);
   1506 			if (abs(selmon->wx - nx) < snap)
   1507 				nx = selmon->wx;
   1508 			else if (abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
   1509 				nx = selmon->wx + selmon->ww - WIDTH(c);
   1510 			if (abs(selmon->wy - ny) < snap)
   1511 				ny = selmon->wy;
   1512 			else if (abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
   1513 				ny = selmon->wy + selmon->wh - HEIGHT(c);
   1514 			if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
   1515 			&& (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
   1516 				togglefloating(NULL);
   1517 			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
   1518 				resize(c, nx, ny, c->w, c->h, 1);
   1519 			break;
   1520 		}
   1521 	} while (ev.type != ButtonRelease);
   1522 	XUngrabPointer(dpy, CurrentTime);
   1523 	if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
   1524 		sendmon(c, m);
   1525 		selmon = m;
   1526 		focus(NULL);
   1527 	}
   1528 }
   1529 
   1530 Client *
   1531 nexttiled(Client *c)
   1532 {
   1533 	for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
   1534 	return c;
   1535 }
   1536 
   1537 void
   1538 pop(Client *c)
   1539 {
   1540 	detach(c);
   1541 	attach(c);
   1542 	focus(c);
   1543 	arrange(c->mon);
   1544 }
   1545 
   1546 void
   1547 propertynotify(XEvent *e)
   1548 {
   1549 	Client *c;
   1550 	Window trans;
   1551 	XPropertyEvent *ev = &e->xproperty;
   1552 
   1553 	if ((c = wintosystrayicon(ev->window))) {
   1554 		if (ev->atom == XA_WM_NORMAL_HINTS) {
   1555 			updatesizehints(c);
   1556 			updatesystrayicongeom(c, c->w, c->h);
   1557 		}
   1558 		else
   1559 			updatesystrayiconstate(c, ev);
   1560 		resizebarwin(selmon);
   1561 		updatesystray();
   1562 	}
   1563 
   1564     if ((ev->window == root) && (ev->atom == XA_WM_NAME))
   1565 		updatestatus();
   1566 	else if (ev->state == PropertyDelete)
   1567 		return; /* ignore */
   1568 	else if ((c = wintoclient(ev->window))) {
   1569 		switch(ev->atom) {
   1570 		default: break;
   1571 		case XA_WM_TRANSIENT_FOR:
   1572 			if (!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
   1573 				(c->isfloating = (wintoclient(trans)) != NULL))
   1574 				arrange(c->mon);
   1575 			break;
   1576 		case XA_WM_NORMAL_HINTS:
   1577 			c->hintsvalid = 0;
   1578 			break;
   1579 		case XA_WM_HINTS:
   1580 			updatewmhints(c);
   1581 			drawbars();
   1582 			break;
   1583 		}
   1584 		if (ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
   1585 			updatetitle(c);
   1586 			if (c == c->mon->sel)
   1587 				drawbar(c->mon);
   1588 		}
   1589 		if (ev->atom == netatom[NetWMWindowType])
   1590 			updatewindowtype(c);
   1591 	}
   1592 }
   1593 
   1594 void
   1595 quit(const Arg *arg)
   1596 {
   1597 	running = 0;
   1598 }
   1599 
   1600 Monitor *
   1601 recttomon(int x, int y, int w, int h)
   1602 {
   1603 	Monitor *m, *r = selmon;
   1604 	int a, area = 0;
   1605 
   1606 	for (m = mons; m; m = m->next)
   1607 		if ((a = INTERSECT(x, y, w, h, m)) > area) {
   1608 			area = a;
   1609 			r = m;
   1610 		}
   1611 	return r;
   1612 }
   1613 
   1614 void
   1615 removesystrayicon(Client *i)
   1616 {
   1617 	Client **ii;
   1618 
   1619 	if (!showsystray || !i)
   1620 		return;
   1621 	for (ii = &systray->icons; *ii && *ii != i; ii = &(*ii)->next);
   1622 	if (ii)
   1623 		*ii = i->next;
   1624 	free(i);
   1625 }
   1626 
   1627 void
   1628 resize(Client *c, int x, int y, int w, int h, int interact)
   1629 {
   1630 	if (applysizehints(c, &x, &y, &w, &h, interact))
   1631 		resizeclient(c, x, y, w, h);
   1632 }
   1633 
   1634 void
   1635 resizebarwin(Monitor *m) {
   1636 	unsigned int w = m->ww;
   1637 	if (showsystray && m == systraytomon(m) && !systrayonleft)
   1638 		w -= getsystraywidth();
   1639 	XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, w, bh);
   1640 }
   1641 
   1642 void
   1643 resizeclient(Client *c, int x, int y, int w, int h)
   1644 {
   1645 	XWindowChanges wc;
   1646 
   1647 	c->oldx = c->x; c->x = wc.x = x;
   1648 	c->oldy = c->y; c->y = wc.y = y;
   1649 	c->oldw = c->w; c->w = wc.width = w;
   1650 	c->oldh = c->h; c->h = wc.height = h;
   1651 	wc.border_width = c->bw;
   1652 	XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
   1653 	configure(c);
   1654 	XSync(dpy, False);
   1655 }
   1656 
   1657 void
   1658 resizemouse(const Arg *arg)
   1659 {
   1660 	int ocx, ocy, nw, nh;
   1661 	Client *c;
   1662 	Monitor *m;
   1663 	XEvent ev;
   1664 	Time lasttime = 0;
   1665 
   1666 	if (!(c = selmon->sel))
   1667 		return;
   1668 	if (c->isfullscreen) /* no support resizing fullscreen windows by mouse */
   1669 		return;
   1670 	restack(selmon);
   1671 	ocx = c->x;
   1672 	ocy = c->y;
   1673 	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
   1674 		None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
   1675 		return;
   1676 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
   1677 	do {
   1678 		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
   1679 		switch(ev.type) {
   1680 		case ConfigureRequest:
   1681 		case Expose:
   1682 		case MapRequest:
   1683 			handler[ev.type](&ev);
   1684 			break;
   1685 		case MotionNotify:
   1686 			if ((ev.xmotion.time - lasttime) <= (1000 / 60))
   1687 				continue;
   1688 			lasttime = ev.xmotion.time;
   1689 
   1690 			nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
   1691 			nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
   1692 			if (c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
   1693 			&& c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
   1694 			{
   1695 				if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
   1696 				&& (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
   1697 					togglefloating(NULL);
   1698 			}
   1699 			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
   1700 				resize(c, c->x, c->y, nw, nh, 1);
   1701 			break;
   1702 		}
   1703 	} while (ev.type != ButtonRelease);
   1704 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
   1705 	XUngrabPointer(dpy, CurrentTime);
   1706 	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
   1707 	if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
   1708 		sendmon(c, m);
   1709 		selmon = m;
   1710 		focus(NULL);
   1711 	}
   1712 }
   1713 
   1714 void
   1715 resizerequest(XEvent *e)
   1716 {
   1717 	XResizeRequestEvent *ev = &e->xresizerequest;
   1718 	Client *i;
   1719 
   1720 	if ((i = wintosystrayicon(ev->window))) {
   1721 		updatesystrayicongeom(i, ev->width, ev->height);
   1722 		resizebarwin(selmon);
   1723 		updatesystray();
   1724 	}
   1725 }
   1726 
   1727 void
   1728 restack(Monitor *m)
   1729 {
   1730 	Client *c;
   1731 	XEvent ev;
   1732 	XWindowChanges wc;
   1733 
   1734 	drawbar(m);
   1735 	if (!m->sel)
   1736 		return;
   1737 	if (m->sel->isfloating || !m->lt[m->sellt]->arrange)
   1738 		XRaiseWindow(dpy, m->sel->win);
   1739 	if (m->lt[m->sellt]->arrange) {
   1740 		wc.stack_mode = Below;
   1741 		wc.sibling = m->barwin;
   1742 		for (c = m->stack; c; c = c->snext)
   1743 			if (!c->isfloating && ISVISIBLE(c)) {
   1744 				XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
   1745 				wc.sibling = c->win;
   1746 			}
   1747 	}
   1748 	XSync(dpy, False);
   1749 	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
   1750 }
   1751 
   1752 void
   1753 run(void)
   1754 {
   1755 	XEvent ev;
   1756 	/* main event loop */
   1757 	XSync(dpy, False);
   1758 	while (running && !XNextEvent(dpy, &ev))
   1759 		if (handler[ev.type])
   1760 			handler[ev.type](&ev); /* call handler */
   1761 }
   1762 
   1763 void
   1764 scan(void)
   1765 {
   1766 	unsigned int i, num;
   1767 	Window d1, d2, *wins = NULL;
   1768 	XWindowAttributes wa;
   1769 
   1770 	if (XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
   1771 		for (i = 0; i < num; i++) {
   1772 			if (!XGetWindowAttributes(dpy, wins[i], &wa)
   1773 			|| wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
   1774 				continue;
   1775 			if (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
   1776 				manage(wins[i], &wa);
   1777 		}
   1778 		for (i = 0; i < num; i++) { /* now the transients */
   1779 			if (!XGetWindowAttributes(dpy, wins[i], &wa))
   1780 				continue;
   1781 			if (XGetTransientForHint(dpy, wins[i], &d1)
   1782 			&& (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
   1783 				manage(wins[i], &wa);
   1784 		}
   1785 		if (wins)
   1786 			XFree(wins);
   1787 	}
   1788 }
   1789 
   1790 void
   1791 sendmon(Client *c, Monitor *m)
   1792 {
   1793 	if (c->mon == m)
   1794 		return;
   1795 	unfocus(c, 1);
   1796 	detach(c);
   1797 	detachstack(c);
   1798 	c->mon = m;
   1799 	c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
   1800 	attach(c);
   1801 	attachstack(c);
   1802 	focus(NULL);
   1803 	arrange(NULL);
   1804 }
   1805 
   1806 void
   1807 setclientstate(Client *c, long state)
   1808 {
   1809 	long data[] = { state, None };
   1810 
   1811 	XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
   1812 		PropModeReplace, (unsigned char *)data, 2);
   1813 }
   1814 
   1815 int
   1816 sendevent(Window w, Atom proto, int mask, long d0, long d1, long d2, long d3, long d4)
   1817 {
   1818 	int n;
   1819 	Atom *protocols, mt;
   1820 	int exists = 0;
   1821 	XEvent ev;
   1822 
   1823 	if (proto == wmatom[WMTakeFocus] || proto == wmatom[WMDelete]) {
   1824 		mt = wmatom[WMProtocols];
   1825 		if (XGetWMProtocols(dpy, w, &protocols, &n)) {
   1826 			while (!exists && n--)
   1827 				exists = protocols[n] == proto;
   1828 			XFree(protocols);
   1829 		}
   1830 	}
   1831 	else {
   1832 		exists = True;
   1833 		mt = proto;
   1834     }
   1835 
   1836 	if (exists) {
   1837 		ev.type = ClientMessage;
   1838 		ev.xclient.window = w;
   1839 		ev.xclient.message_type = mt;
   1840 		ev.xclient.format = 32;
   1841 		ev.xclient.data.l[0] = d0;
   1842 		ev.xclient.data.l[1] = d1;
   1843 		ev.xclient.data.l[2] = d2;
   1844 		ev.xclient.data.l[3] = d3;
   1845 		ev.xclient.data.l[4] = d4;
   1846 		XSendEvent(dpy, w, False, mask, &ev);
   1847 	}
   1848 	return exists;
   1849 }
   1850 
   1851 void
   1852 setfocus(Client *c)
   1853 {
   1854 	if (!c->neverfocus) {
   1855 		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
   1856 		XChangeProperty(dpy, root, netatom[NetActiveWindow],
   1857 			XA_WINDOW, 32, PropModeReplace,
   1858 			(unsigned char *) &(c->win), 1);
   1859 	}
   1860 	sendevent(c->win, wmatom[WMTakeFocus], NoEventMask, wmatom[WMTakeFocus], CurrentTime, 0, 0, 0);
   1861 }
   1862 
   1863 void
   1864 setfullscreen(Client *c, int fullscreen)
   1865 {
   1866 	if (fullscreen && !c->isfullscreen) {
   1867 		XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
   1868 			PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
   1869 		c->isfullscreen = 1;
   1870 		c->oldstate = c->isfloating;
   1871 		c->oldbw = c->bw;
   1872 		c->bw = 0;
   1873 		c->isfloating = 1;
   1874 		resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
   1875 		XRaiseWindow(dpy, c->win);
   1876 	} else if (!fullscreen && c->isfullscreen){
   1877 		XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
   1878 			PropModeReplace, (unsigned char*)0, 0);
   1879 		c->isfullscreen = 0;
   1880 		c->isfloating = c->oldstate;
   1881 		c->bw = c->oldbw;
   1882 		c->x = c->oldx;
   1883 		c->y = c->oldy;
   1884 		c->w = c->oldw;
   1885 		c->h = c->oldh;
   1886 		resizeclient(c, c->x, c->y, c->w, c->h);
   1887 		arrange(c->mon);
   1888 	}
   1889 }
   1890 
   1891 void
   1892 setlayout(const Arg *arg)
   1893 {
   1894 	if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
   1895 		selmon->sellt ^= 1;
   1896 	if (arg && arg->v)
   1897 		selmon->lt[selmon->sellt] = (Layout *)arg->v;
   1898 	strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
   1899 	if (selmon->sel)
   1900 		arrange(selmon);
   1901 	else
   1902 		drawbar(selmon);
   1903 }
   1904 
   1905 /* arg > 1.0 will set mfact absolutely */
   1906 void
   1907 setmfact(const Arg *arg)
   1908 {
   1909 	float f;
   1910 
   1911 	if (!arg || !selmon->lt[selmon->sellt]->arrange)
   1912 		return;
   1913 	f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
   1914 	if (f < 0.05 || f > 0.95)
   1915 		return;
   1916 	selmon->mfact = f;
   1917 	arrange(selmon);
   1918 }
   1919 
   1920 unsigned char
   1921 sixd_to_8bit(int x)
   1922 {
   1923 	return x == 0 ? 0 : 0x37 + 0x28 * x;
   1924 }
   1925 
   1926 void
   1927 setup(void)
   1928 {
   1929 	int i;
   1930 	XSetWindowAttributes wa;
   1931 	Atom utf8string;
   1932 	struct sigaction sa;
   1933 	char cbuf[8];
   1934 
   1935 	/* do not transform children into zombies when they terminate */
   1936 	sigemptyset(&sa.sa_mask);
   1937 	sa.sa_flags = SA_NOCLDSTOP | SA_NOCLDWAIT | SA_RESTART;
   1938 	sa.sa_handler = SIG_IGN;
   1939 	sigaction(SIGCHLD, &sa, NULL);
   1940 
   1941 	/* clean up any zombies (inherited from .xinitrc etc) immediately */
   1942 	while (waitpid(-1, NULL, WNOHANG) > 0);
   1943 
   1944 	/* init screen */
   1945 	screen = DefaultScreen(dpy);
   1946 	sw = DisplayWidth(dpy, screen);
   1947 	sh = DisplayHeight(dpy, screen);
   1948 	root = RootWindow(dpy, screen);
   1949 	drw = drw_create(dpy, screen, root, sw, sh);
   1950 	if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
   1951 		die("no fonts could be loaded.");
   1952 	lrpad = drw->fonts->h;
   1953 	bh = drw->fonts->h + 2;
   1954 	updategeom();
   1955 	/* init atoms */
   1956 	utf8string = XInternAtom(dpy, "UTF8_STRING", False);
   1957 	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
   1958 	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
   1959 	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
   1960 	wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
   1961 	netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
   1962    netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
   1963 	netatom[NetSystemTray] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_S0", False);
   1964 	netatom[NetSystemTrayOP] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_OPCODE", False);
   1965 	netatom[NetSystemTrayOrientation] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_ORIENTATION", False);
   1966 	netatom[NetSystemTrayOrientationHorz] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_ORIENTATION_HORZ", False);
   1967     netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
   1968 	netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
   1969 	netatom[NetWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
   1970 	netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
   1971 	netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
   1972 	netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
   1973 	netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
   1974 	xatom[Manager] = XInternAtom(dpy, "MANAGER", False);
   1975 	xatom[Xembed] = XInternAtom(dpy, "_XEMBED", False);
   1976 	xatom[XembedInfo] = XInternAtom(dpy, "_XEMBED_INFO", False);
   1977     /* init cursors */
   1978 	cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
   1979 	cursor[CurResize] = drw_cur_create(drw, XC_sizing);
   1980 	cursor[CurMove] = drw_cur_create(drw, XC_fleur);
   1981 	/* init appearance */
   1982 	scheme = ecalloc(LENGTH(colors), sizeof(Clr *));
   1983 	for (i = 0; i < LENGTH(colors); i++)
   1984 		scheme[i] = drw_scm_create(drw, colors[i], 3);
   1985 
   1986 	for (i = 0; i < LENGTH(barcolors) && i < 256; i++)
   1987 		drw_clr_create(drw, &barclrs[i], barcolors[i]);
   1988 	if (i == 0)
   1989 		drw_clr_create(drw, &barclrs[i++], "#000000");
   1990 	for (; i < 7; i++) {
   1991 		snprintf(cbuf, sizeof(cbuf), "#%02x%02x%02x",
   1992 			 !!(i & 1) * 0x7f,
   1993 			 !!(i & 2) * 0x7f,
   1994 			 !!(i & 4) * 0x7f);
   1995 		drw_clr_create(drw, &barclrs[i], cbuf);
   1996 	}
   1997 	if (i == 7)
   1998 		drw_clr_create(drw, &barclrs[i++], "#000000");
   1999 	if (i == 8)
   2000 		drw_clr_create(drw, &barclrs[i++], "#333333");
   2001 	for (; i < 16; i++) {
   2002 		snprintf(cbuf, sizeof(cbuf), "#%02x%02x%02x",
   2003 			 !!(i & 1) * 0xff,
   2004 			 !!(i & 2) * 0xff,
   2005 			 !!(i & 4) * 0xff);
   2006 		drw_clr_create(drw, &barclrs[i], cbuf);
   2007 	}
   2008 	for (; i < 6 * 6 * 6 + 16; i++) {
   2009 		snprintf(cbuf, sizeof(cbuf), "#%02x%02x%02x",
   2010 			 sixd_to_8bit(((i - 16) / 36) % 6),
   2011 			 sixd_to_8bit(((i - 16) / 6) % 6),
   2012 			 sixd_to_8bit(((i - 16)) % 6));
   2013 		drw_clr_create(drw, &barclrs[i], cbuf);
   2014 	}
   2015 	for (; i < 256; i++) {
   2016 		snprintf(cbuf, sizeof(cbuf), "#%02x%02x%02x",
   2017 			 0x08 + (i - 6 * 6 * 6 - 16) * 0x0a,
   2018 			 0x08 + (i - 6 * 6 * 6 - 16) * 0x0a,
   2019 			 0x08 + (i - 6 * 6 * 6 - 16) * 0x0a);
   2020 		drw_clr_create(drw, &barclrs[i], cbuf);
   2021 	}
   2022 
   2023 	/* init system tray */
   2024 	updatesystray();
   2025 	/* init bars */
   2026 	updatebars();
   2027 	updatestatus();
   2028 	/* supporting window for NetWMCheck */
   2029 	wmcheckwin = XCreateSimpleWindow(dpy, root, 0, 0, 1, 1, 0, 0, 0);
   2030 	XChangeProperty(dpy, wmcheckwin, netatom[NetWMCheck], XA_WINDOW, 32,
   2031 		PropModeReplace, (unsigned char *) &wmcheckwin, 1);
   2032 	XChangeProperty(dpy, wmcheckwin, netatom[NetWMName], utf8string, 8,
   2033 		PropModeReplace, (unsigned char *) "dwm", 3);
   2034 	XChangeProperty(dpy, root, netatom[NetWMCheck], XA_WINDOW, 32,
   2035 		PropModeReplace, (unsigned char *) &wmcheckwin, 1);
   2036 	/* EWMH support per view */
   2037 	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
   2038 		PropModeReplace, (unsigned char *) netatom, NetLast);
   2039 	XDeleteProperty(dpy, root, netatom[NetClientList]);
   2040 	/* select events */
   2041 	wa.cursor = cursor[CurNormal]->cursor;
   2042 	wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
   2043 		|ButtonPressMask|PointerMotionMask|EnterWindowMask
   2044 		|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
   2045 	XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
   2046 	XSelectInput(dpy, root, wa.event_mask);
   2047 	grabkeys();
   2048 	focus(NULL);
   2049 }
   2050 
   2051 void
   2052 seturgent(Client *c, int urg)
   2053 {
   2054 	XWMHints *wmh;
   2055 
   2056 	c->isurgent = urg;
   2057 	if (!(wmh = XGetWMHints(dpy, c->win)))
   2058 		return;
   2059 	wmh->flags = urg ? (wmh->flags | XUrgencyHint) : (wmh->flags & ~XUrgencyHint);
   2060 	XSetWMHints(dpy, c->win, wmh);
   2061 	XFree(wmh);
   2062 }
   2063 
   2064 void
   2065 showhide(Client *c)
   2066 {
   2067 	if (!c)
   2068 		return;
   2069 	if (ISVISIBLE(c)) {
   2070 		/* show clients top down */
   2071 		XMoveWindow(dpy, c->win, c->x, c->y);
   2072 		if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
   2073 			resize(c, c->x, c->y, c->w, c->h, 0);
   2074 		showhide(c->snext);
   2075 	} else {
   2076 		/* hide clients bottom up */
   2077 		showhide(c->snext);
   2078 		XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
   2079 	}
   2080 }
   2081 
   2082 void
   2083 spawn(const Arg *arg)
   2084 {
   2085 	struct sigaction sa;
   2086 
   2087 	if (arg->v == dmenucmd)
   2088 		dmenumon[0] = '0' + selmon->num;
   2089 	if (fork() == 0) {
   2090 		if (dpy)
   2091 			close(ConnectionNumber(dpy));
   2092 		setsid();
   2093 
   2094 		sigemptyset(&sa.sa_mask);
   2095 		sa.sa_flags = 0;
   2096 		sa.sa_handler = SIG_DFL;
   2097 		sigaction(SIGCHLD, &sa, NULL);
   2098 
   2099 		execvp(((char **)arg->v)[0], (char **)arg->v);
   2100 		die("dwm: execvp '%s' failed:", ((char **)arg->v)[0]);
   2101 	}
   2102 }
   2103 
   2104 void
   2105 tag(const Arg *arg)
   2106 {
   2107 	if (selmon->sel && arg->ui & TAGMASK) {
   2108 		selmon->sel->tags = arg->ui & TAGMASK;
   2109 		focus(NULL);
   2110 		arrange(selmon);
   2111 	}
   2112 }
   2113 
   2114 void
   2115 tagmon(const Arg *arg)
   2116 {
   2117 	if (!selmon->sel || !mons->next)
   2118 		return;
   2119 	sendmon(selmon->sel, dirtomon(arg->i));
   2120 }
   2121 
   2122 void
   2123 tile(Monitor *m)
   2124 {
   2125 	unsigned int i, n, h, mw, my, ty;
   2126 	Client *c;
   2127 
   2128 	for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
   2129 	if (n == 0)
   2130 		return;
   2131 
   2132 	if (n > m->nmaster)
   2133 		mw = m->nmaster ? m->ww * m->mfact : 0;
   2134 	else
   2135 		mw = m->ww;
   2136 	for (i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
   2137 		if (i < m->nmaster) {
   2138 			h = (m->wh - my) / (MIN(n, m->nmaster) - i);
   2139 			resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), 0);
   2140 			if (my + HEIGHT(c) < m->wh)
   2141 				my += HEIGHT(c);
   2142 		} else {
   2143 			h = (m->wh - ty) / (n - i);
   2144 			resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), 0);
   2145 			if (ty + HEIGHT(c) < m->wh)
   2146 				ty += HEIGHT(c);
   2147 		}
   2148 }
   2149 
   2150 void
   2151 togglebar(const Arg *arg)
   2152 {
   2153 	selmon->showbar = !selmon->showbar;
   2154 	updatebarpos(selmon);
   2155 	resizebarwin(selmon);
   2156 	if (showsystray) {
   2157 		XWindowChanges wc;
   2158 		if (!selmon->showbar)
   2159 			wc.y = -bh;
   2160 		else if (selmon->showbar) {
   2161 			wc.y = 0;
   2162 			if (!selmon->topbar)
   2163 				wc.y = selmon->mh - bh;
   2164 		}
   2165 		XConfigureWindow(dpy, systray->win, CWY, &wc);
   2166 	}
   2167 	arrange(selmon);
   2168 }
   2169 
   2170 void
   2171 togglefloating(const Arg *arg)
   2172 {
   2173 	if (!selmon->sel)
   2174 		return;
   2175 	if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
   2176 		return;
   2177 	selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
   2178 	if (selmon->sel->isfloating)
   2179 		resize(selmon->sel, selmon->sel->x, selmon->sel->y,
   2180 			selmon->sel->w, selmon->sel->h, 0);
   2181 	arrange(selmon);
   2182 }
   2183 
   2184 void
   2185 toggletag(const Arg *arg)
   2186 {
   2187 	unsigned int newtags;
   2188 
   2189 	if (!selmon->sel)
   2190 		return;
   2191 	newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
   2192 	if (newtags) {
   2193 		selmon->sel->tags = newtags;
   2194 		focus(NULL);
   2195 		arrange(selmon);
   2196 	}
   2197 }
   2198 
   2199 void
   2200 toggleview(const Arg *arg)
   2201 {
   2202 	unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
   2203 
   2204 	if (newtagset) {
   2205 		selmon->tagset[selmon->seltags] = newtagset;
   2206 		focus(NULL);
   2207 		arrange(selmon);
   2208 	}
   2209 }
   2210 
   2211 void
   2212 unfocus(Client *c, int setfocus)
   2213 {
   2214 	if (!c)
   2215 		return;
   2216 	grabbuttons(c, 0);
   2217 	XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);
   2218 	if (setfocus) {
   2219 		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
   2220 		XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
   2221 	}
   2222 }
   2223 
   2224 void
   2225 unmanage(Client *c, int destroyed)
   2226 {
   2227 	Monitor *m = c->mon;
   2228 	XWindowChanges wc;
   2229 
   2230 	detach(c);
   2231 	detachstack(c);
   2232 	if (!destroyed) {
   2233 		wc.border_width = c->oldbw;
   2234 		XGrabServer(dpy); /* avoid race conditions */
   2235 		XSetErrorHandler(xerrordummy);
   2236 		XSelectInput(dpy, c->win, NoEventMask);
   2237 		XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
   2238 		XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
   2239 		setclientstate(c, WithdrawnState);
   2240 		XSync(dpy, False);
   2241 		XSetErrorHandler(xerror);
   2242 		XUngrabServer(dpy);
   2243 	}
   2244 	free(c);
   2245 	focus(NULL);
   2246 	updateclientlist();
   2247 	arrange(m);
   2248 }
   2249 
   2250 void
   2251 unmapnotify(XEvent *e)
   2252 {
   2253 	Client *c;
   2254 	XUnmapEvent *ev = &e->xunmap;
   2255 
   2256 	if ((c = wintoclient(ev->window))) {
   2257 		if (ev->send_event)
   2258 			setclientstate(c, WithdrawnState);
   2259 		else
   2260 			unmanage(c, 0);
   2261 	}
   2262 	else if ((c = wintosystrayicon(ev->window))) {
   2263 		/* KLUDGE! sometimes icons occasionally unmap their windows, but do
   2264 		 * _not_ destroy them. We map those windows back */
   2265 		XMapRaised(dpy, c->win);
   2266 		updatesystray();
   2267 	}
   2268 }
   2269 
   2270 void
   2271 updatebars(void)
   2272 {
   2273 	unsigned int w;
   2274 	Monitor *m;
   2275 	XSetWindowAttributes wa = {
   2276 		.override_redirect = True,
   2277 		.background_pixmap = ParentRelative,
   2278 		.event_mask = ButtonPressMask|ExposureMask
   2279 	};
   2280 	XClassHint ch = {"dwm", "dwm"};
   2281 	for (m = mons; m; m = m->next) {
   2282 		if (m->barwin)
   2283 			continue;
   2284 		w = m->ww;
   2285 		if (showsystray && m == systraytomon(m))
   2286 			w -= getsystraywidth();
   2287 		m->barwin = XCreateWindow(dpy, root, m->wx, m->by, w, bh, 0, DefaultDepth(dpy, screen),
   2288 				CopyFromParent, DefaultVisual(dpy, screen),
   2289 				CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
   2290 		XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
   2291 		if (showsystray && m == systraytomon(m))
   2292 			XMapRaised(dpy, systray->win);
   2293 		XMapRaised(dpy, m->barwin);
   2294 		XSetClassHint(dpy, m->barwin, &ch);
   2295 	}
   2296 }
   2297 
   2298 void
   2299 updatebarpos(Monitor *m)
   2300 {
   2301 	m->wy = m->my;
   2302 	m->wh = m->mh;
   2303 	if (m->showbar) {
   2304 		m->wh -= bh;
   2305 		m->by = m->topbar ? m->wy : m->wy + m->wh;
   2306 		m->wy = m->topbar ? m->wy + bh : m->wy;
   2307 	} else
   2308 		m->by = -bh;
   2309 }
   2310 
   2311 void
   2312 updateclientlist()
   2313 {
   2314 	Client *c;
   2315 	Monitor *m;
   2316 
   2317 	XDeleteProperty(dpy, root, netatom[NetClientList]);
   2318 	for (m = mons; m; m = m->next)
   2319 		for (c = m->clients; c; c = c->next)
   2320 			XChangeProperty(dpy, root, netatom[NetClientList],
   2321 				XA_WINDOW, 32, PropModeAppend,
   2322 				(unsigned char *) &(c->win), 1);
   2323 }
   2324 
   2325 int
   2326 updategeom(void)
   2327 {
   2328 	int dirty = 0;
   2329 
   2330 #ifdef XINERAMA
   2331 	if (XineramaIsActive(dpy)) {
   2332 		int i, j, n, nn;
   2333 		Client *c;
   2334 		Monitor *m;
   2335 		XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
   2336 		XineramaScreenInfo *unique = NULL;
   2337 
   2338 		for (n = 0, m = mons; m; m = m->next, n++);
   2339 		/* only consider unique geometries as separate screens */
   2340 		unique = ecalloc(nn, sizeof(XineramaScreenInfo));
   2341 		for (i = 0, j = 0; i < nn; i++)
   2342 			if (isuniquegeom(unique, j, &info[i]))
   2343 				memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
   2344 		XFree(info);
   2345 		nn = j;
   2346 
   2347 		/* new monitors if nn > n */
   2348 		for (i = n; i < nn; i++) {
   2349 			for (m = mons; m && m->next; m = m->next);
   2350 			if (m)
   2351 				m->next = createmon();
   2352 			else
   2353 				mons = createmon();
   2354 		}
   2355 		for (i = 0, m = mons; i < nn && m; m = m->next, i++)
   2356 			if (i >= n
   2357 			|| unique[i].x_org != m->mx || unique[i].y_org != m->my
   2358 			|| unique[i].width != m->mw || unique[i].height != m->mh)
   2359 			{
   2360 				dirty = 1;
   2361 				m->num = i;
   2362 				m->mx = m->wx = unique[i].x_org;
   2363 				m->my = m->wy = unique[i].y_org;
   2364 				m->mw = m->ww = unique[i].width;
   2365 				m->mh = m->wh = unique[i].height;
   2366 				updatebarpos(m);
   2367 			}
   2368 		/* removed monitors if n > nn */
   2369 		for (i = nn; i < n; i++) {
   2370 			for (m = mons; m && m->next; m = m->next);
   2371 			while ((c = m->clients)) {
   2372 				dirty = 1;
   2373 				m->clients = c->next;
   2374 				detachstack(c);
   2375 				c->mon = mons;
   2376 				attach(c);
   2377 				attachstack(c);
   2378 			}
   2379 			if (m == selmon)
   2380 				selmon = mons;
   2381 			cleanupmon(m);
   2382 		}
   2383 		free(unique);
   2384 	} else
   2385 #endif /* XINERAMA */
   2386 	{ /* default monitor setup */
   2387 		if (!mons)
   2388 			mons = createmon();
   2389 		if (mons->mw != sw || mons->mh != sh) {
   2390 			dirty = 1;
   2391 			mons->mw = mons->ww = sw;
   2392 			mons->mh = mons->wh = sh;
   2393 			updatebarpos(mons);
   2394 		}
   2395 	}
   2396 	if (dirty) {
   2397 		selmon = mons;
   2398 		selmon = wintomon(root);
   2399 	}
   2400 	return dirty;
   2401 }
   2402 
   2403 void
   2404 updatenumlockmask(void)
   2405 {
   2406 	unsigned int i, j;
   2407 	XModifierKeymap *modmap;
   2408 
   2409 	numlockmask = 0;
   2410 	modmap = XGetModifierMapping(dpy);
   2411 	for (i = 0; i < 8; i++)
   2412 		for (j = 0; j < modmap->max_keypermod; j++)
   2413 			if (modmap->modifiermap[i * modmap->max_keypermod + j]
   2414 				== XKeysymToKeycode(dpy, XK_Num_Lock))
   2415 				numlockmask = (1 << i);
   2416 	XFreeModifiermap(modmap);
   2417 }
   2418 
   2419 void
   2420 updatesizehints(Client *c)
   2421 {
   2422 	long msize;
   2423 	XSizeHints size;
   2424 
   2425 	if (!XGetWMNormalHints(dpy, c->win, &size, &msize))
   2426 		/* size is uninitialized, ensure that size.flags aren't used */
   2427 		size.flags = PSize;
   2428 	if (size.flags & PBaseSize) {
   2429 		c->basew = size.base_width;
   2430 		c->baseh = size.base_height;
   2431 	} else if (size.flags & PMinSize) {
   2432 		c->basew = size.min_width;
   2433 		c->baseh = size.min_height;
   2434 	} else
   2435 		c->basew = c->baseh = 0;
   2436 	if (size.flags & PResizeInc) {
   2437 		c->incw = size.width_inc;
   2438 		c->inch = size.height_inc;
   2439 	} else
   2440 		c->incw = c->inch = 0;
   2441 	if (size.flags & PMaxSize) {
   2442 		c->maxw = size.max_width;
   2443 		c->maxh = size.max_height;
   2444 	} else
   2445 		c->maxw = c->maxh = 0;
   2446 	if (size.flags & PMinSize) {
   2447 		c->minw = size.min_width;
   2448 		c->minh = size.min_height;
   2449 	} else if (size.flags & PBaseSize) {
   2450 		c->minw = size.base_width;
   2451 		c->minh = size.base_height;
   2452 	} else
   2453 		c->minw = c->minh = 0;
   2454 	if (size.flags & PAspect) {
   2455 		c->mina = (float)size.min_aspect.y / size.min_aspect.x;
   2456 		c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
   2457 	} else
   2458 		c->maxa = c->mina = 0.0;
   2459 	c->isfixed = (c->maxw && c->maxh && c->maxw == c->minw && c->maxh == c->minh);
   2460 	c->hintsvalid = 1;
   2461 }
   2462 
   2463 void
   2464 updatestatus(void)
   2465 {
   2466 	if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
   2467 		strcpy(stext, "dwm-"VERSION);
   2468 	drawbar(selmon);
   2469 	updatesystray();
   2470 }
   2471 
   2472 
   2473 void
   2474 updatesystrayicongeom(Client *i, int w, int h)
   2475 {
   2476 	if (i) {
   2477 		i->h = bh;
   2478 		if (w == h)
   2479 			i->w = bh;
   2480 		else if (h == bh)
   2481 			i->w = w;
   2482 		else
   2483 			i->w = (int) ((float)bh * ((float)w / (float)h));
   2484 		applysizehints(i, &(i->x), &(i->y), &(i->w), &(i->h), False);
   2485 		/* force icons into the systray dimensions if they don't want to */
   2486 		if (i->h > bh) {
   2487 			if (i->w == i->h)
   2488 				i->w = bh;
   2489 			else
   2490 				i->w = (int) ((float)bh * ((float)i->w / (float)i->h));
   2491 			i->h = bh;
   2492 		}
   2493 	}
   2494 }
   2495 
   2496 void
   2497 updatesystrayiconstate(Client *i, XPropertyEvent *ev)
   2498 {
   2499 	long flags;
   2500 	int code = 0;
   2501 
   2502 	if (!showsystray || !i || ev->atom != xatom[XembedInfo] ||
   2503 			!(flags = getatomprop(i, xatom[XembedInfo])))
   2504 		return;
   2505 
   2506 	if (flags & XEMBED_MAPPED && !i->tags) {
   2507 		i->tags = 1;
   2508 		code = XEMBED_WINDOW_ACTIVATE;
   2509 		XMapRaised(dpy, i->win);
   2510 		setclientstate(i, NormalState);
   2511 	}
   2512 	else if (!(flags & XEMBED_MAPPED) && i->tags) {
   2513 		i->tags = 0;
   2514 		code = XEMBED_WINDOW_DEACTIVATE;
   2515 		XUnmapWindow(dpy, i->win);
   2516 		setclientstate(i, WithdrawnState);
   2517 	}
   2518 	else
   2519 		return;
   2520 	sendevent(i->win, xatom[Xembed], StructureNotifyMask, CurrentTime, code, 0,
   2521 			systray->win, XEMBED_EMBEDDED_VERSION);
   2522 }
   2523 
   2524 void
   2525 updatesystray(void)
   2526 {
   2527 	XSetWindowAttributes wa;
   2528 	XWindowChanges wc;
   2529 	Client *i;
   2530 	Monitor *m = systraytomon(NULL);
   2531 	unsigned int x = m->mx + m->mw;
   2532 	unsigned int sw = TEXTW(stext) - lrpad + systrayspacing;
   2533 	unsigned int w = 1;
   2534 
   2535 	if (!showsystray)
   2536 		return;
   2537 	if (systrayonleft)
   2538 		x -= sw + lrpad / 2;
   2539 	if (!systray) {
   2540 		/* init systray */
   2541 		if (!(systray = (Systray *)calloc(1, sizeof(Systray))))
   2542 			die("fatal: could not malloc() %u bytes\n", sizeof(Systray));
   2543 		systray->win = XCreateSimpleWindow(dpy, root, x, m->by, w, bh, 0, 0, scheme[SchemeSel][ColBg].pixel);
   2544 		wa.event_mask        = ButtonPressMask | ExposureMask;
   2545 		wa.override_redirect = True;
   2546 		wa.background_pixel  = scheme[SchemeNorm][ColBg].pixel;
   2547 		XSelectInput(dpy, systray->win, SubstructureNotifyMask);
   2548 		XChangeProperty(dpy, systray->win, netatom[NetSystemTrayOrientation], XA_CARDINAL, 32,
   2549 				PropModeReplace, (unsigned char *)&netatom[NetSystemTrayOrientationHorz], 1);
   2550 		XChangeWindowAttributes(dpy, systray->win, CWEventMask|CWOverrideRedirect|CWBackPixel, &wa);
   2551 		XMapRaised(dpy, systray->win);
   2552 		XSetSelectionOwner(dpy, netatom[NetSystemTray], systray->win, CurrentTime);
   2553 		if (XGetSelectionOwner(dpy, netatom[NetSystemTray]) == systray->win) {
   2554 			sendevent(root, xatom[Manager], StructureNotifyMask, CurrentTime, netatom[NetSystemTray], systray->win, 0, 0);
   2555 			XSync(dpy, False);
   2556 		}
   2557 		else {
   2558 			fprintf(stderr, "dwm: unable to obtain system tray.\n");
   2559 			free(systray);
   2560 			systray = NULL;
   2561 			return;
   2562 		}
   2563 	}
   2564 	for (w = 0, i = systray->icons; i; i = i->next) {
   2565 		/* make sure the background color stays the same */
   2566 		wa.background_pixel  = scheme[SchemeNorm][ColBg].pixel;
   2567 		XChangeWindowAttributes(dpy, i->win, CWBackPixel, &wa);
   2568 		XMapRaised(dpy, i->win);
   2569 		w += systrayspacing;
   2570 		i->x = w;
   2571 		XMoveResizeWindow(dpy, i->win, i->x, 0, i->w, i->h);
   2572 		w += i->w;
   2573 		if (i->mon != m)
   2574 			i->mon = m;
   2575 	}
   2576 	w = w ? w + systrayspacing : 1;
   2577 	x -= w;
   2578 	XMoveResizeWindow(dpy, systray->win, x, m->by, w, bh);
   2579 	wc.x = x; wc.y = m->by; wc.width = w; wc.height = bh;
   2580 	wc.stack_mode = Above; wc.sibling = m->barwin;
   2581 	XConfigureWindow(dpy, systray->win, CWX|CWY|CWWidth|CWHeight|CWSibling|CWStackMode, &wc);
   2582 	XMapWindow(dpy, systray->win);
   2583 	XMapSubwindows(dpy, systray->win);
   2584 	/* redraw background */
   2585 	XSetForeground(dpy, drw->gc, scheme[SchemeNorm][ColBg].pixel);
   2586 	XFillRectangle(dpy, systray->win, drw->gc, 0, 0, w, bh);
   2587 	XSync(dpy, False);
   2588 }
   2589 
   2590 void
   2591 updatetitle(Client *c)
   2592 {
   2593 	if (!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
   2594 		gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
   2595 	if (c->name[0] == '\0') /* hack to mark broken clients */
   2596 		strcpy(c->name, broken);
   2597 }
   2598 
   2599 void
   2600 updatewindowtype(Client *c)
   2601 {
   2602 	Atom state = getatomprop(c, netatom[NetWMState]);
   2603 	Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
   2604 
   2605 	if (state == netatom[NetWMFullscreen])
   2606 		setfullscreen(c, 1);
   2607 	if (wtype == netatom[NetWMWindowTypeDialog])
   2608 		c->isfloating = 1;
   2609 }
   2610 
   2611 void
   2612 updatewmhints(Client *c)
   2613 {
   2614 	XWMHints *wmh;
   2615 
   2616 	if ((wmh = XGetWMHints(dpy, c->win))) {
   2617 		if (c == selmon->sel && wmh->flags & XUrgencyHint) {
   2618 			wmh->flags &= ~XUrgencyHint;
   2619 			XSetWMHints(dpy, c->win, wmh);
   2620 		} else
   2621 			c->isurgent = (wmh->flags & XUrgencyHint) ? 1 : 0;
   2622 		if (wmh->flags & InputHint)
   2623 			c->neverfocus = !wmh->input;
   2624 		else
   2625 			c->neverfocus = 0;
   2626 		XFree(wmh);
   2627 	}
   2628 }
   2629 
   2630 void
   2631 view(const Arg *arg)
   2632 {
   2633 	if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
   2634 		return;
   2635 	selmon->seltags ^= 1; /* toggle sel tagset */
   2636 	if (arg->ui & TAGMASK)
   2637 		selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
   2638 	focus(NULL);
   2639 	arrange(selmon);
   2640 }
   2641 
   2642 Client *
   2643 wintoclient(Window w)
   2644 {
   2645 	Client *c;
   2646 	Monitor *m;
   2647 
   2648 	for (m = mons; m; m = m->next)
   2649 		for (c = m->clients; c; c = c->next)
   2650 			if (c->win == w)
   2651 				return c;
   2652 	return NULL;
   2653 }
   2654 
   2655 Client *
   2656 wintosystrayicon(Window w) {
   2657 	Client *i = NULL;
   2658 
   2659 	if (!showsystray || !w)
   2660 		return i;
   2661 	for (i = systray->icons; i && i->win != w; i = i->next) ;
   2662 	return i;
   2663 }
   2664 
   2665 Monitor *
   2666 wintomon(Window w)
   2667 {
   2668 	int x, y;
   2669 	Client *c;
   2670 	Monitor *m;
   2671 
   2672 	if (w == root && getrootptr(&x, &y))
   2673 		return recttomon(x, y, 1, 1);
   2674 	for (m = mons; m; m = m->next)
   2675 		if (w == m->barwin)
   2676 			return m;
   2677 	if ((c = wintoclient(w)))
   2678 		return c->mon;
   2679 	return selmon;
   2680 }
   2681 
   2682 /* There's no way to check accesses to destroyed windows, thus those cases are
   2683  * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
   2684  * default error handler, which may call exit. */
   2685 int
   2686 xerror(Display *dpy, XErrorEvent *ee)
   2687 {
   2688 	if (ee->error_code == BadWindow
   2689 	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
   2690 	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
   2691 	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
   2692 	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
   2693 	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
   2694 	|| (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
   2695 	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
   2696 	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
   2697 		return 0;
   2698 	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
   2699 		ee->request_code, ee->error_code);
   2700 	return xerrorxlib(dpy, ee); /* may call exit */
   2701 }
   2702 
   2703 int
   2704 xerrordummy(Display *dpy, XErrorEvent *ee)
   2705 {
   2706 	return 0;
   2707 }
   2708 
   2709 /* Startup Error handler to check if another window manager
   2710  * is already running. */
   2711 int
   2712 xerrorstart(Display *dpy, XErrorEvent *ee)
   2713 {
   2714 	die("dwm: another window manager is already running");
   2715 	return -1;
   2716 }
   2717 
   2718 Monitor *
   2719 systraytomon(Monitor *m) {
   2720 	Monitor *t;
   2721 	int i, n;
   2722 	if(!systraypinning) {
   2723 		if(!m)
   2724 			return selmon;
   2725 		return m == selmon ? m : NULL;
   2726 	}
   2727 	for(n = 1, t = mons; t && t->next; n++, t = t->next) ;
   2728 	for(i = 1, t = mons; t && t->next && i < systraypinning; i++, t = t->next) ;
   2729 	if(systraypinningfailfirst && n < systraypinning)
   2730 		return mons;
   2731 	return t;
   2732 }
   2733 
   2734 void
   2735 zoom(const Arg *arg)
   2736 {
   2737 	Client *c = selmon->sel;
   2738 
   2739 	if (!selmon->lt[selmon->sellt]->arrange || !c || c->isfloating)
   2740 		return;
   2741 	if (c == nexttiled(selmon->clients) && !(c = nexttiled(c->next)))
   2742 		return;
   2743 	pop(c);
   2744 }
   2745 
   2746 void
   2747 start_keyring(void) {
   2748 	FILE *gkd = popen("gnome-keyring-daemon --start", "r");
   2749 
   2750 	while (gkd && !feof(gkd)) {
   2751 		char line[4096];
   2752 		char *sep;
   2753 		char *val;
   2754 
   2755 		if (!fgets(line, sizeof(line), gkd))
   2756 			continue;
   2757 
   2758 		sep = strchr(line, '=');
   2759 
   2760 		if (sep)
   2761 			*sep = '\0';
   2762 		else
   2763 			continue;
   2764 
   2765 		val = sep + 1;
   2766 
   2767 		if (*val == '"') {
   2768 			sep = strchr(++val, '"');
   2769 			if (sep)
   2770 				*sep = '\0';
   2771 		} else {
   2772 			sep = strchr(val, ' ');
   2773 			if (sep)
   2774 				*sep = '\0';
   2775 			sep = strchr(val, '\t');
   2776 			if (sep)
   2777 				*sep = '\0';
   2778 			sep = strchr(val, '\n');
   2779 			if (sep)
   2780 				*sep = '\0';
   2781 		}
   2782 
   2783 		setenv(line, val, 1);
   2784 	}
   2785 	if (gkd)
   2786 		pclose(gkd);
   2787 }
   2788 
   2789 void
   2790 startup(void) {
   2791 	char buffer[4096];
   2792 	const char *home = getenv("HOME");
   2793 	const char *args[] = { NULL, NULL };
   2794 	Arg arg;
   2795 
   2796 	start_keyring();
   2797 
   2798 	snprintf(buffer, sizeof(buffer), "%s/%s", home, ".dwmsession");
   2799 	args[0] = buffer;
   2800 	arg.v = args;
   2801 
   2802 	if (!access(buffer, X_OK))
   2803 		spawn(&arg);
   2804 }
   2805 
   2806 int
   2807 main(int argc, char *argv[])
   2808 {
   2809 	if (argc == 2 && !strcmp("-v", argv[1]))
   2810 		die("dwm-"VERSION);
   2811 	else if (argc != 1)
   2812 		die("usage: dwm [-v]");
   2813 	if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
   2814 		fputs("warning: no locale support\n", stderr);
   2815 	if (!(dpy = XOpenDisplay(NULL)))
   2816 		die("dwm: cannot open display");
   2817 	checkotherwm();
   2818 	setup();
   2819 #ifdef __OpenBSD__
   2820 	if (pledge("stdio rpath proc exec", NULL) == -1)
   2821 		die("pledge");
   2822 #endif /* __OpenBSD__ */
   2823 	scan();
   2824 	startup();
   2825 	run();
   2826 	cleanup();
   2827 	XCloseDisplay(dpy);
   2828 	return EXIT_SUCCESS;
   2829 }