dwm.c

/* For LICENSE see bottom of file */

#include <errno.h>
#include <locale.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <X11/cursorfont.h>
#include <X11/XKBlib.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xproto.h>
#include <X11/Xresource.h>
#include <X11/Xutil.h>
#ifdef XINERAMA
#include <X11/extensions/Xinerama.h>
#endif /* XINERAMA */
#include <X11/Xft/Xft.h>
#include <X11/Xlib-xcb.h>
#include <xcb/res.h>
#include <stdbool.h>
#ifdef __OpenBSD__
#include <sys/sysctl.h>
#include <kvm.h>
#endif /* __OpenBSD */

#include "drw.h"
#include "util.h"

/* macros */
#define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
#define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
#define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
                               * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
#define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
#define LENGTH(X)               (sizeof X / sizeof X[0])
#define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
#define WIDTH(X)                ((X)->w + 2 * (X)->bw)
#define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
#define TAGMASK                 ((1 << LENGTH(tags)) - 1)
#define TEXTW(X)                (drw_fontset_getwidth(drw, (X)) + lrpad)
#define XRDB_LOAD_COLOR(R,V)    if (XrmGetResource(xrdb, R, NULL, &type, &value) == True) { \
                                  if (value.addr != NULL && strnlen(value.addr, 8) == 7 && value.addr[0] == '#') { \
                                    int i = 1; \
                                    for (; i <= 6; i++) { \
                                      if (value.addr[i] < 48) break; \
                                      if (value.addr[i] > 57 && value.addr[i] < 65) break; \
                                      if (value.addr[i] > 70 && value.addr[i] < 97) break; \
                                      if (value.addr[i] > 102) break; \
                                    } \
                                    if (i == 7) { \
                                      strncpy(V, value.addr, 7); \
                                      V[7] = '\0'; \
                                    } \
                                  } \
                                }

#define SYSTEM_TRAY_REQUEST_DOCK    0
#define _NET_SYSTEM_TRAY_ORIENTATION_HORZ 0

/* XEMBED messages */
#define XEMBED_EMBEDDED_NOTIFY      0
#define XEMBED_WINDOW_ACTIVATE      1
#define XEMBED_FOCUS_IN             4
#define XEMBED_MODALITY_ON         10

#define XEMBED_MAPPED              (1 << 0)
#define XEMBED_WINDOW_ACTIVATE      1
#define XEMBED_WINDOW_DEACTIVATE    2

#define VERSION_MAJOR               0
#define VERSION_MINOR               0
#define XEMBED_EMBEDDED_VERSION (VERSION_MAJOR << 16) | VERSION_MINOR

/* enums */
enum { Manager, Xembed, XembedInfo, XLast }; /* Xembed atoms */
enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
enum { SchemeNorm, SchemeSel, SchemeBtn, TitleText }; /* color schemes */
enum { NetSupported, NetSystemTray, NetSystemTrayOP, NetSystemTrayOrientation, NetSystemTrayVisual,
       NetWMName, NetWMIcon, NetWMState, NetWMFullscreen, NetActiveWindow, NetWMWindowType, NetWMWindowTypeDock,
       NetSystemTrayOrientationHorz, NetWMWindowTypeDialog, NetClientList, NetWMCheck, NetClientInfo, NetLast
     }; /* EWMH atoms */
enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkButton, ClkWinTitle,
       ClkClientWin, ClkRootWin, ClkLast
     }; /* clicks */

typedef union {
	int i;
	unsigned int ui;
	float f;
	const void *v;
} Arg;

typedef struct {
	unsigned int click;
	unsigned int mask;
	unsigned int button;
	void (*func)(const Arg *arg);
	const Arg arg;
} Button;

typedef struct Monitor Monitor;
typedef struct Client Client;
struct Client {
	char name[256];
	float mina, maxa;
	float cfact;
	int x, y, w, h;
	int oldx, oldy, oldw, oldh;
	int basew, baseh, incw, inch, maxw, maxh, minw, minh, hintsvalid;
	int bw, oldbw;
	unsigned int tags;
	int isfixed, iscentered, isfloating, isurgent, neverfocus, oldstate, isfullscreen, isterminal, noswallow;
	unsigned int icw, ich; Picture icon;
	int fakefullscreen;
	pid_t pid;
	Client *next;
	Client *snext;
	Client *swallowing;
	Monitor *mon;
	Window win;
};

typedef struct {
	unsigned int mod;
	KeySym keysym;
	void (*func)(const Arg *);
	const Arg arg;
} Key;

typedef struct {
	const char *symbol;
	void (*arrange)(Monitor *);
} Layout;

typedef struct Pertag Pertag;
struct Monitor {
	char ltsymbol[16];
	float mfact;
	int nmaster;
	int num;
	int by;               /* bar geometry */
	int mx, my, mw, mh;   /* screen size */
	int wx, wy, ww, wh;   /* window area  */
	int gappih;           /* horizontal gap between windows */
	int gappiv;           /* vertical gap between windows */
	int gappoh;           /* horizontal outer gaps */
	int gappov;           /* vertical outer gaps */
	unsigned int seltags;
	unsigned int sellt;
	unsigned int tagset[2];
	int showbar;
	int topbar;
	Client *clients;
	Client *sel;
	Client *stack;
	Monitor *next;
	Window barwin;
	const Layout *lt[2];
	Pertag *pertag;
};

typedef struct {
	const char *class;
	const char *instance;
	const char *title;
	unsigned int tags;
	int iscentered;
	int isfloating;
	int isterminal;
	int noswallow;
	int monitor;
} Rule;

typedef struct Systray Systray;
struct Systray {
	Window win;
	Client *icons;
};

/* function declarations */
static void applyrules(Client *c);
static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
static void arrange(Monitor *m);
static void arrangemon(Monitor *m);
static void attach(Client *c);
static void attachstack(Client *c);
static void buttonpress(XEvent *e);
static void checkotherwm(void);
static void cleanup(void);
static void cleanupmon(Monitor *mon);
static void clientmessage(XEvent *e);
static void configure(Client *c);
static void configurenotify(XEvent *e);
static void configurerequest(XEvent *e);
static Monitor *createmon(void);
static void cyclelayout(const Arg *arg);
static void destroynotify(XEvent *e);
static void detach(Client *c);
static void detachstack(Client *c);
static Monitor *dirtomon(int dir);
static void drawbar(Monitor *m);
static void drawbars(void);
static int drawstatusbar(Monitor *m, int bh, char* text);
static void enternotify(XEvent *e);
static void expose(XEvent *e);
static void focus(Client *c);
static void focusin(XEvent *e);
static void focusmon(const Arg *arg);
static void focusstack(const Arg *arg);
static Atom getatomprop(Client *c, Atom prop);
static Picture geticonprop(Window w, unsigned int *icw, unsigned int *ich);
static int getrootptr(int *x, int *y);
static long getstate(Window w);
static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
static unsigned int getsystraywidth();
static void grabbuttons(Client *c, int focused);
static void grabkeys(void);
static void incnmaster(const Arg *arg);
static void inplacerotate(const Arg *arg);
static void keypress(XEvent *e);
static void killclient(const Arg *arg);
static void layoutmenu(const Arg *arg);
static void losefullscreen(Client *next);
static void loadxrdb(void);
static void manage(Window w, XWindowAttributes *wa);
static void mappingnotify(XEvent *e);
static void maprequest(XEvent *e);
static void monocle(Monitor *m);
static void motionnotify(XEvent *e);
static void moveresize(const Arg *arg);
static void movemouse(const Arg *arg);
static Client *nexttiled(Client *c);
static void pop(Client *c);
static void propertynotify(XEvent *e);
static void quit(const Arg *arg);
static Monitor *recttomon(int x, int y, int w, int h);
static void reorganizetags(const Arg *arg);
static void resize(Client *c, int x, int y, int w, int h, int interact);
static void resizeclient(Client *c, int x, int y, int w, int h);
static void resizemouse(const Arg *arg);
static void removesystrayicon(Client *i);
static void resizerequest(XEvent *e);
static void restack(Monitor *m);
static void run(void);
static void scan(void);
static int sendevent(Window w, Atom proto, int m, long d0, long d1, long d2, long d3, long d4);
static void sendmon(Client *c, Monitor *m);
static void setclientstate(Client *c, long state);
static void setclienttagprop(Client *c);
static void setfocus(Client *c);
static void setfullscreen(Client *c, int fullscreen);
static void setlayout(const Arg *arg);
static void setcfact(const Arg *arg);
static void setmfact(const Arg *arg);
static void setup(void);
static void seturgent(Client *c, int urg);
static void showhide(Client *c);
static void spawn(const Arg *arg);
static void sighup(int unused);
static void sigterm(int unused);
static Monitor *systraytomon(Monitor *m);
static void tag(const Arg *arg);
static void tagmon(const Arg *arg);
static void togglebar(const Arg *arg);
static void togglefakefullscreen(const Arg *arg);
static void togglefloating(const Arg *arg);
static void togglescratch(const Arg *arg);
static void togglefullscreen(const Arg *arg);
static void toggletag(const Arg *arg);
static void toggleview(const Arg *arg);
static void freeicon(Client *c);
static void unfocus(Client *c, int setfocus);
static void unmanage(Client *c, int destroyed);
static void unmapnotify(XEvent *e);
static void updatebarpos(Monitor *m);
static void updatebars(void);
static void updateclientlist(void);
static int updategeom(void);
static void updatenumlockmask(void);
static void updatesizehints(Client *c);
static void updatestatus(void);
static void updatesystray(int updatebar);
static void updatesystrayicongeom(Client *i, int w, int h);
static void updatesystrayiconstate(Client *i, XPropertyEvent *ev);
static void updatetitle(Client *c);
static void updateicon(Client *c);
static void updatewindowtype(Client *c);
static void updatewmhints(Client *c);
static void view(const Arg *arg);
static Client *wintoclient(Window w);
static Monitor *wintomon(Window w);
static Client *wintosystrayicon(Window w);
static int xerror(Display *dpy, XErrorEvent *ee);
static int xerrordummy(Display *dpy, XErrorEvent *ee);
static int xerrorstart(Display *dpy, XErrorEvent *ee);
static void xrdb(const Arg *arg);
static void xinitvisual();
static void zoom(const Arg *arg);
static void killunsel(const Arg *arg);
static void reset_mfact(const Arg *arg);

static pid_t getparentprocess(pid_t p);
static int isdescprocess(pid_t p, pid_t c);
static Client *swallowingclient(Window w);
static Client *termforwin(const Client *c);
static pid_t winpid(Window w);

/* variables */
static const char broken[] = "broken";
static char stext[1024];
static int screen;
static int sw, sh;           /* X display screen geometry width, height */
static int bh;               /* bar height */
static int lrpad;            /* sum of left and right padding for text */
static int (*xerrorxlib)(Display *, XErrorEvent *);
static unsigned int numlockmask = 0;
static void (*handler[LASTEvent]) (XEvent *) = {
	[ButtonPress] = buttonpress,
	[ClientMessage] = clientmessage,
	[ConfigureRequest] = configurerequest,
	[ConfigureNotify] = configurenotify,
	[DestroyNotify] = destroynotify,
	[EnterNotify] = enternotify,
	[Expose] = expose,
	[FocusIn] = focusin,
	[KeyPress] = keypress,
	[MappingNotify] = mappingnotify,
	[MapRequest] = maprequest,
	[MotionNotify] = motionnotify,
	[PropertyNotify] = propertynotify,
	[ResizeRequest] = resizerequest,
	[UnmapNotify] = unmapnotify
};
static Atom wmatom[WMLast], netatom[NetLast], xatom[XLast];
static int restart = 0;
static int running = 1;
static Cur *cursor[CurLast];
static Clr **scheme;
static Display *dpy;
static Drw *drw;
static Monitor *mons, *selmon;
static Window root, wmcheckwin;

static Systray *systray = NULL;
static unsigned long systrayorientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;

static int useargb = 0;
static Visual *visual;
static int depth;
static Colormap cmap;

static xcb_connection_t *xcon;

/* configuration, allows nested code to access above variables */
#include "config.h"

struct Pertag {
	unsigned int curtag, prevtag; /* current and previous tag */
	int nmasters[LENGTH(tags) + 1]; /* number of windows in master area */
	float mfacts[LENGTH(tags) + 1]; /* mfacts per tag */
	unsigned int sellts[LENGTH(tags) + 1]; /* selected layouts */
	const Layout *ltidxs[LENGTH(tags) + 1][2]; /* matrix of tags and layouts indexes  */
	bool showbars[LENGTH(tags) + 1]; /* display bar for the current tag */
#if ZOOMSWAP_PATCH
	Client *prevzooms[LENGTH(tags) + 1]; /* store zoom information */
#endif // ZOOMSWAP_PATCH
};

static unsigned int scratchtag = 1 << LENGTH(tags);

/* compile-time check if all tags fit into an unsigned int bit array. */
struct NumTags {
	char limitexceeded[LENGTH(tags) > 31 ? -1 : 1];
};

/* function implementations */
void
applyrules(Client *c)
{
	const char *class, *instance;
	unsigned int i;
	const Rule *r;
	Monitor *m;
	XClassHint ch = { NULL, NULL };

	/* rule matching */
	c->iscentered = 0;
	c->isfloating = 0;
	c->tags = 0;
	XGetClassHint(dpy, c->win, &ch);
	class    = ch.res_class ? ch.res_class : broken;
	instance = ch.res_name  ? ch.res_name  : broken;

	for (i = 0; i < LENGTH(rules); i++) {
		r = &rules[i];
		if ((!r->title || strstr(c->name, r->title))
		                && (!r->class || strstr(class, r->class))
		                && (!r->instance || strstr(instance, r->instance))) {
			c->isterminal = r->isterminal;
			c->noswallow  = r->noswallow;
			c->iscentered = r->iscentered;
			c->isfloating = r->isfloating;
			c->tags |= r->tags;
			for (m = mons; m && m->num != r->monitor; m = m->next);
			if (m) {
				c->mon = m;
			}
		}
	}
	if (ch.res_class) {
		XFree(ch.res_class);
	}
	if (ch.res_name) {
		XFree(ch.res_name);
	}
	c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
}

int
applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact)
{
	int baseismin;
	Monitor *m = c->mon;

	/* set minimum possible */
	*w = MAX(1, *w);
	*h = MAX(1, *h);
	if (interact) {
		if (*x > sw) {
			*x = sw - WIDTH(c);
		}
		if (*y > sh) {
			*y = sh - HEIGHT(c);
		}
		if (*x + *w + 2 * c->bw < 0) {
			*x = 0;
		}
		if (*y + *h + 2 * c->bw < 0) {
			*y = 0;
		}
	} else {
		if (*x >= m->wx + m->ww) {
			*x = m->wx + m->ww - WIDTH(c);
		}
		if (*y >= m->wy + m->wh) {
			*y = m->wy + m->wh - HEIGHT(c);
		}
		if (*x + *w + 2 * c->bw <= m->wx) {
			*x = m->wx;
		}
		if (*y + *h + 2 * c->bw <= m->wy) {
			*y = m->wy;
		}
	}
	if (*h < bh) {
		*h = bh;
	}
	if (*w < bh) {
		*w = bh;
	}
	if (resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
		if (!c->hintsvalid) {
			updatesizehints(c);
		}
		/* see last two sentences in ICCCM 4.1.2.3 */
		baseismin = c->basew == c->minw && c->baseh == c->minh;
		if (!baseismin) { /* temporarily remove base dimensions */
			*w -= c->basew;
			*h -= c->baseh;
		}
		/* adjust for aspect limits */
		if (c->mina > 0 && c->maxa > 0) {
			if (c->maxa < (float)*w / *h) {
				*w = *h * c->maxa + 0.5;
			} else if (c->mina < (float)*h / *w) {
				*h = *w * c->mina + 0.5;
			}
		}
		if (baseismin) { /* increment calculation requires this */
			*w -= c->basew;
			*h -= c->baseh;
		}
		/* adjust for increment value */
		if (c->incw) {
			*w -= *w % c->incw;
		}
		if (c->inch) {
			*h -= *h % c->inch;
		}
		/* restore base dimensions */
		*w = MAX(*w + c->basew, c->minw);
		*h = MAX(*h + c->baseh, c->minh);
		if (c->maxw) {
			*w = MIN(*w, c->maxw);
		}
		if (c->maxh) {
			*h = MIN(*h, c->maxh);
		}
	}
	return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
}

void
arrange(Monitor *m)
{
	if (m) {
		showhide(m->stack);
	} else for (m = mons; m; m = m->next) {
			showhide(m->stack);
		}
	if (m) {
		arrangemon(m);
		restack(m);
	} else for (m = mons; m; m = m->next) {
			arrangemon(m);
		}
}

void
arrangemon(Monitor *m)
{
	strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
	if (m->lt[m->sellt]->arrange) {
		m->lt[m->sellt]->arrange(m);
	}
}

void
attach(Client *c)
{
	c->next = c->mon->clients;
	c->mon->clients = c;
}

void
attachstack(Client *c)
{
	c->snext = c->mon->stack;
	c->mon->stack = c;
}

void
swallow(Client *p, Client *c)
{

	if (c->noswallow || c->isterminal) {
		return;
	}
	if (c->noswallow && !swallowfloating && c->isfloating) {
		return;
	}

	detach(c);
	detachstack(c);

	setclientstate(c, WithdrawnState);
	XUnmapWindow(dpy, p->win);

	p->swallowing = c;
	c->mon = p->mon;

	Window w = p->win;
	p->win = c->win;
	c->win = w;
	updatetitle(p);
	XMoveResizeWindow(dpy, p->win, p->x, p->y, p->w, p->h);
	arrange(p->mon);
	configure(p);
	updateclientlist();
}

void
unswallow(Client *c)
{
	c->win = c->swallowing->win;

	free(c->swallowing);
	c->swallowing = NULL;

	/* unfullscreen the client */
	setfullscreen(c, 0);
	updatetitle(c);
	arrange(c->mon);
	XMapWindow(dpy, c->win);
	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
	setclientstate(c, NormalState);
	focus(NULL);
	arrange(c->mon);
}

void
buttonpress(XEvent *e)
{
	unsigned int i, x, click;
	Arg arg = {0};
	Client *c;
	Monitor *m;
	XButtonPressedEvent *ev = &e->xbutton;

	click = ClkRootWin;
	/* focus monitor if necessary */
	if ((m = wintomon(ev->window)) && m != selmon) {
		unfocus(selmon->sel, 1);
		selmon = m;
		focus(NULL);
	}
	if (ev->window == selmon->barwin) {
		i = x = 0;
		x += TEXTW(buttonbar);
		if(ev->x < x) {
			click = ClkButton;
		} else {
		unsigned int occ = 0;
		for(c = m->clients; c; c=c->next)
			occ |= c->tags;
		do {
			/* Do not reserve space for vacant tags */
			if (!(occ & 1 << i || m->tagset[m->seltags] & 1 << i))
				continue;
				  x += TEXTW(tags[i]);
    } while (ev->x >= x && ++i < LENGTH(tags));
			if (i < LENGTH(tags)) {
				click = ClkTagBar;
				arg.ui = 1 << i;
			} else if (ev->x < x + TEXTW(selmon->ltsymbol))
				click = ClkLtSymbol;
			else if (ev->x > selmon->ww - TEXTW(stext))
				click = ClkStatusText;
			else
				click = ClkWinTitle;
		}
	} else if ((c = wintoclient(ev->window))) {
		focus(c);
		restack(selmon);
		XAllowEvents(dpy, ReplayPointer, CurrentTime);
		click = ClkClientWin;
	}
	for (i = 0; i < LENGTH(buttons); i++)
		if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
		                && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state)) {
			buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
		}
}

void
checkotherwm(void)
{
	xerrorxlib = XSetErrorHandler(xerrorstart);
	/* this causes an error if some other window manager is running */
	XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
	XSync(dpy, False);
	XSetErrorHandler(xerror);
	XSync(dpy, False);
}

void
cleanup(void)
{
	Arg a = {.ui = ~0};
	Layout foo = { "", NULL };
	Monitor *m;
	size_t i;

	view(&a);
	selmon->lt[selmon->sellt] = &foo;
	for (m = mons; m; m = m->next)
		while (m->stack) {
			unmanage(m->stack, 0);
		}
	XUngrabKey(dpy, AnyKey, AnyModifier, root);
	while (mons) {
		cleanupmon(mons);
	}
	if (showsystray) {
		while (systray->icons) {
			removesystrayicon(systray->icons);
		}
		XUnmapWindow(dpy, systray->win);
		XDestroyWindow(dpy, systray->win);
		free(systray);
	}
	for (i = 0; i < CurLast; i++) {
		drw_cur_free(drw, cursor[i]);
	}
	for (i = 0; i < LENGTH(colors) + 1; i++) {
		free(scheme[i]);
	}
	free(scheme);
	XDestroyWindow(dpy, wmcheckwin);
	drw_free(drw);
	XSync(dpy, False);
	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
	XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
}

void
cleanupmon(Monitor *mon)
{
	Monitor *m;

	if (mon == mons) {
		mons = mons->next;
	} else {
		for (m = mons; m && m->next != mon; m = m->next);
		m->next = mon->next;
	}
	XUnmapWindow(dpy, mon->barwin);
	XDestroyWindow(dpy, mon->barwin);
	free(mon->pertag);
	free(mon);
}

void
clientmessage(XEvent *e)
{
	XWindowAttributes wa;
	XSetWindowAttributes swa;
	XClientMessageEvent *cme = &e->xclient;
	Client *c = wintoclient(cme->window);

	if (showsystray && cme->window == systray->win && cme->message_type == netatom[NetSystemTrayOP]) {
		/* add systray icons */
		if (cme->data.l[1] == SYSTEM_TRAY_REQUEST_DOCK) {
			if (!(c = (Client *)calloc(1, sizeof(Client)))) {
				die("fatal: could not malloc() %u bytes\n", sizeof(Client));
			}
			if (!(c->win = cme->data.l[2])) {
				free(c);
				return;
			}

			c->mon = selmon;
			c->next = systray->icons;
			systray->icons = c;
			XGetWindowAttributes(dpy, c->win, &wa);
			c->x = c->oldx = c->y = c->oldy = 0;
			c->w = c->oldw = wa.width;
			c->h = c->oldh = wa.height;
			c->oldbw = wa.border_width;
			c->bw = 0;
			c->isfloating = True;
			/* reuse tags field as mapped status */
			c->tags = 1;
			updatesizehints(c);
			updatesystrayicongeom(c, wa.width, wa.height);
			XAddToSaveSet(dpy, c->win);
			XSelectInput(dpy, c->win, StructureNotifyMask | PropertyChangeMask | ResizeRedirectMask);
			XReparentWindow(dpy, c->win, systray->win, 0, 0);
			/* use parents background color */
			swa.background_pixel  = scheme[SchemeNorm][ColBg].pixel;
			XChangeWindowAttributes(dpy, c->win, CWBackPixel, &swa);
			sendevent(c->win, netatom[Xembed], StructureNotifyMask, CurrentTime, XEMBED_EMBEDDED_NOTIFY, 0, systray->win, XEMBED_EMBEDDED_VERSION);
			XSync(dpy, False);
			setclientstate(c, NormalState);
			updatesystray(1);
		}
		return;
	}

	if (!c) {
		return;
	}
	if (cme->message_type == netatom[NetWMState]) {
		if (cme->data.l[1] == netatom[NetWMFullscreen]
		                || cme->data.l[2] == netatom[NetWMFullscreen]) {
			if (c->fakefullscreen == 2 && c->isfullscreen) {
				c->fakefullscreen = 3;
			}
			setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
			                  || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
		}
	} else if (cme->message_type == netatom[NetActiveWindow]) {
		if (c != selmon->sel && !c->isurgent) {
			seturgent(c, 1);
		}
	}
}

void
configure(Client *c)
{
	XConfigureEvent ce;

	ce.type = ConfigureNotify;
	ce.display = dpy;
	ce.event = c->win;
	ce.window = c->win;
	ce.x = c->x;
	ce.y = c->y;
	ce.width = c->w;
	ce.height = c->h;
	ce.border_width = c->bw;
	ce.above = None;
	ce.override_redirect = False;
	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
}

void
configurenotify(XEvent *e)
{
	Monitor *m;
	Client *c;
	XConfigureEvent *ev = &e->xconfigure;
	int dirty;

	/* TODO: updategeom handling sucks, needs to be simplified */
	if (ev->window == root) {
		dirty = (sw != ev->width || sh != ev->height);
		sw = ev->width;
		sh = ev->height;
		if (updategeom() || dirty) {
			drw_resize(drw, sw, bh);
			updatebars();
			for (m = mons; m; m = m->next) {
				for (c = m->clients; c; c = c->next)
					if (c->isfullscreen && c->fakefullscreen != 1) {
						resizeclient(c, m->mx, m->my, m->mw, m->mh);
					}
				XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
			}
			focus(NULL);
			arrange(NULL);
		}
	}
}

void
configurerequest(XEvent *e)
{
	Client *c;
	Monitor *m;
	XConfigureRequestEvent *ev = &e->xconfigurerequest;
	XWindowChanges wc;

	if ((c = wintoclient(ev->window))) {
		if (ev->value_mask & CWBorderWidth) {
			c->bw = ev->border_width;
		} else if (c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
			m = c->mon;
			if (ev->value_mask & CWX) {
				c->oldx = c->x;
				c->x = m->mx + ev->x;
			}
			if (ev->value_mask & CWY) {
				c->oldy = c->y;
				c->y = m->my + ev->y;
			}
			if (ev->value_mask & CWWidth) {
				c->oldw = c->w;
				c->w = ev->width;
			}
			if (ev->value_mask & CWHeight) {
				c->oldh = c->h;
				c->h = ev->height;
			}
			if ((c->x + c->w) > m->mx + m->mw && c->isfloating) {
				c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2);        /* center in x direction */
			}
			if ((c->y + c->h) > m->my + m->mh && c->isfloating) {
				c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2);        /* center in y direction */
			}
			if ((ev->value_mask & (CWX | CWY)) && !(ev->value_mask & (CWWidth | CWHeight))) {
				configure(c);
			}
			if (ISVISIBLE(c)) {
				XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
			}
		} else {
			configure(c);
		}
	} else {
		wc.x = ev->x;
		wc.y = ev->y;
		wc.width = ev->width;
		wc.height = ev->height;
		wc.border_width = ev->border_width;
		wc.sibling = ev->above;
		wc.stack_mode = ev->detail;
		XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
	}
	XSync(dpy, False);
}

Monitor *
createmon(void)
{
	Monitor *m;
	int i;

	m = ecalloc(1, sizeof(Monitor));
	m->tagset[0] = m->tagset[1] = 1;
	m->mfact = mfact;
	m->nmaster = nmaster;
	m->showbar = showbar;
	m->topbar = topbar;
	m->gappih = gappih;
	m->gappiv = gappiv;
	m->gappoh = gappoh;
	m->gappov = gappov;
	m->lt[0] = &layouts[0];
	m->lt[1] = &layouts[1 % LENGTH(layouts)];
	strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
	if (!(m->pertag = (Pertag *)calloc(1, sizeof(Pertag)))) {
		die("fatal: could not malloc() %u bytes\n", sizeof(Pertag));
	}
	m->pertag->curtag = m->pertag->prevtag = 1;
	for (i = 0; i <= LENGTH(tags); i++) {
		/* init nmaster */
		m->pertag->nmasters[i] = m->nmaster;

		/* init mfacts */
		m->pertag->mfacts[i] = m->mfact;

		/* init layouts */
		m->pertag->ltidxs[i][0] = m->lt[0];
		m->pertag->ltidxs[i][1] = m->lt[1];
		m->pertag->sellts[i] = m->sellt;

		/* init showbar */
		m->pertag->showbars[i] = m->showbar;

#if ZOOMSWAP_PATCH
		m->pertag->prevzooms[i] = NULL;
#endif // ZOOMSWAP_PATCH
	}
	return m;
}

void
cyclelayout(const Arg *arg)
{
	Layout *l;
	for (l = (Layout *)layouts; l != selmon->lt[selmon->sellt]; l++);
	if (arg->i > 0) {
		if (l->symbol && (l + 1)->symbol)
			setlayout(&((Arg) {
			.v = (l + 1)
		}));
		else
			setlayout(&((Arg) {
			.v = layouts
		}));
	} else {
		if (l != layouts && (l - 1)->symbol)
			setlayout(&((Arg) {
			.v = (l - 1)
		}));
		else
			setlayout(&((Arg) {
			.v = &layouts[LENGTH(layouts) - 2]
		}));
	}
}

void
destroynotify(XEvent *e)
{
	Client *c;
	XDestroyWindowEvent *ev = &e->xdestroywindow;

	if ((c = wintoclient(ev->window))) {
		unmanage(c, 1);
	} else if ((c = swallowingclient(ev->window))) {
		unmanage(c->swallowing, 1);
	} else if (showsystray && (c = wintosystrayicon(ev->window))) {
		removesystrayicon(c);
		updatesystray(1);
	}
}

void
detach(Client *c)
{
	Client **tc;

	for (tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
	*tc = c->next;
}

void
detachstack(Client *c)
{
	Client **tc, *t;

	for (tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
	*tc = c->snext;

	if (c == c->mon->sel) {
		for (t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
		c->mon->sel = t;
	}
}

Monitor *
dirtomon(int dir)
{
	Monitor *m = NULL;

	if (dir > 0) {
		if (!(m = selmon->next)) {
			m = mons;
		}
	} else if (selmon == mons)
		for (m = mons; m->next; m = m->next);
	else
		for (m = mons; m->next != selmon; m = m->next);
	return m;
}

int
drawstatusbar(Monitor *m, int bh, char* stext)
{
	int ret, i, w, x, len;
	short isCode = 0;
	char *text;
	char *p;

	len = strlen(stext) + 1 ;
	if (!(text = (char*) malloc(sizeof(char) * len))) {
		die("malloc");
	}
	p = text;
	memcpy(text, stext, len);

	/* compute width of the status text */
	w = 0;
	i = -1;
	while (text[++i]) {
		if (text[i] == '^') {
			if (!isCode) {
				isCode = 1;
				text[i] = '\0';
				w += TEXTW(text) - lrpad;
				text[i] = '^';
				if (text[++i] == 'f') {
					w += atoi(text + ++i);
				}
			} else {
				isCode = 0;
				text = text + i + 1;
				i = -1;
			}
		}
	}
	if (!isCode) {
		w += TEXTW(text) - lrpad;
	} else {
		isCode = 0;
	}
	text = p;

	w += horizpadbar;
	ret = m->ww - w;
	x = m->ww - w - getsystraywidth();

	drw_setscheme(drw, scheme[LENGTH(colors)]);
	drw->scheme[ColFg] = scheme[SchemeNorm][ColFg];
	drw->scheme[ColBg] = scheme[SchemeNorm][ColBg];
	drw_rect(drw, x, 0, w, bh, 1, 1);
	x += horizpadbar / 2;

	/* process status text */
	i = -1;
	while (text[++i]) {
		if (text[i] == '^' && !isCode) {
			isCode = 1;

			text[i] = '\0';
			w = TEXTW(text) - lrpad;
			drw_text(drw, x, vertpadbar / 2, w, bh - vertpadbar, 0, text, 0);

			x += w;

			/* process code */
			while (text[++i] != '^') {
				if (text[i] == 'c') {
					char buf[8];
					memcpy(buf, (char*)text + i + 1, 7);
					buf[7] = '\0';
					drw_clr_create(drw, &drw->scheme[ColFg], buf, alphas[SchemeNorm][ColFg]);
					i += 7;
				} else if (text[i] == 'b') {
					char buf[8];
					memcpy(buf, (char*)text + i + 1, 7);
					buf[7] = '\0';
					drw_clr_create(drw, &drw->scheme[ColBg], buf, alphas[SchemeNorm][ColBg]);
					i += 7;
				} else if (text[i] == 'd') {
					drw->scheme[ColFg] = scheme[SchemeNorm][ColFg];
					drw->scheme[ColBg] = scheme[SchemeNorm][ColBg];
				} else if (text[i] == 'r') {
					int rx = atoi(text + ++i);
					while (text[++i] != ',');
					int ry = atoi(text + ++i);
					while (text[++i] != ',');
					int rw = atoi(text + ++i);
					while (text[++i] != ',');
					int rh = atoi(text + ++i);

					drw_rect(drw, rx + x, ry, rw, rh, 1, 0);
				} else if (text[i] == 'f') {
					x += atoi(text + ++i);
				}
			}

			text = text + i + 1;
			i = -1;
			isCode = 0;
		}
	}

	if (!isCode) {
		w = TEXTW(text) - lrpad;
		drw_text(drw, x, vertpadbar / 2 , w, bh - vertpadbar, 0, text, 0);
	}

	drw_setscheme(drw, scheme[SchemeNorm]);
	free(p);

	return ret;
}

void
drawbar(Monitor *m)
{
	int x, w, tw = 0, stw = 0;
	int boxs = drw->fonts->h / 9;
	int boxw = drw->fonts->h / 6 + 2;
	unsigned int i, occ = 0, urg = 0;
	Client *c;

	if (!m->showbar) {
		return;
	}

	if (showsystray && m == systraytomon(m)) {
		stw = getsystraywidth();
		// Systray highlight
		drw_setscheme(drw, scheme[SchemeNorm]);
		drw_rect(drw, m->ww - stw, 0, stw, bh, 1, 1);
	}

	/* draw status first so it can be overdrawn by tags later */
	if (m == selmon) { /* status is only drawn on selected monitor */
		tw = m->ww - drawstatusbar(m, bh, stext);
	}

	for (c = m->clients; c; c = c->next) {
		occ |= c->tags;
		if (c->isurgent) {
			urg |= c->tags;
		}
	}
	x = 0;
	w = TEXTW(buttonbar);
	// Leftmost button highlight
	drw_setscheme(drw, scheme[SchemeBtn]);
	x = drw_text(drw, x, 0, w, bh, lrpad / 2, buttonbar, 0);
	for (i = 0; i < LENGTH(tags); i++) {
		/* Do not draw vacant tags */
		if(!(occ & 1 << i || m->tagset[m->seltags] & 1 << i))
			continue;
		w = TEXTW(tags[i]);
		// Tags highlight
		drw_setscheme(drw, scheme[m->tagset[m->seltags] & 1 << i ? SchemeSel : SchemeNorm]);
		drw_text(drw, x, 0, w, bh, lrpad / 2, tags[i], urg & 1 << i);
		x += w;
	}
	w = TEXTW(m->ltsymbol);
	// Layout highlight
	drw_setscheme(drw, scheme[SchemeNorm]);
	x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);

	if ((w = m->ww - tw - stw - x) > bh) {
		if (m->sel) {
			// Default highlight behaviour. Change titlehighlight from config.def.h
			if (titlehighlight) {
				drw_setscheme(drw, scheme[m == selmon ? SchemeSel : SchemeNorm]);
			} else {
				// Now window title will get titletext highlight
				drw_setscheme(drw, scheme[TitleText]);
			}
			drw_text(drw, x, 0, w, bh, lrpad / 2 + (m->sel->icon ? m->sel->icw + ICONSPACING : 0), m->sel->name, 0);
			if (m->sel->icon) drw_pic(drw, x + lrpad / 2, (bh - m->sel->ich) / 2, m->sel->icw, m->sel->ich, m->sel->icon);
			if (m->sel->isfloating) {
				drw_rect(drw, x + boxs, boxs, boxw, boxw, m->sel->isfixed, 0);
			}
		} else {
			drw_setscheme(drw, scheme[SchemeNorm]);
			drw_rect(drw, x, 0, w, bh, 1, 1);
		}
	}
	drw_map(drw, m->barwin, 0, 0, m->ww, bh);
}

void
drawbars(void)
{
	Monitor *m;

	for (m = mons; m; m = m->next) {
		drawbar(m);
	}

	if (showsystray && !systraypinning) {
		updatesystray(0);
	}
}

void
enternotify(XEvent *e)
{
	Client *c;
	Monitor *m;
	XCrossingEvent *ev = &e->xcrossing;

	if ((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root) {
		return;
	}
	c = wintoclient(ev->window);
	m = c ? c->mon : wintomon(ev->window);
	if (m != selmon) {
		unfocus(selmon->sel, 1);
		selmon = m;
	} else if (!c || c == selmon->sel) {
		return;
	}
	focus(c);
}

void
expose(XEvent *e)
{
	Monitor *m;
	XExposeEvent *ev = &e->xexpose;

	if (ev->count == 0 && (m = wintomon(ev->window))) {
		drawbar(m);

		if (showsystray && m == systraytomon(m)) {
			updatesystray(0);
		}
	}
}

void
focus(Client *c)
{
	if (!c || !ISVISIBLE(c))
		for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
	if (selmon->sel && selmon->sel != c) {
		losefullscreen(c);
		unfocus(selmon->sel, 0);
	}
	if (c) {
		if (c->mon != selmon) {
			selmon = c->mon;
		}
		if (c->isurgent) {
			seturgent(c, 0);
		}
		detachstack(c);
		attachstack(c);
		grabbuttons(c, 1);
		XSetWindowBorder(dpy, c->win, scheme[SchemeSel][ColBorder].pixel);
		setfocus(c);
	} else {
		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
		XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
	}
	selmon->sel = c;
	drawbars();
}

/* there are some broken focus acquiring clients needing extra handling */
void
focusin(XEvent *e)
{
	XFocusChangeEvent *ev = &e->xfocus;

	if (selmon->sel && ev->window != selmon->sel->win) {
		setfocus(selmon->sel);
	}
}

void
focusmon(const Arg *arg)
{
	Monitor *m;

	if (!mons->next) {
		return;
	}
	if ((m = dirtomon(arg->i)) == selmon) {
		return;
	}
	unfocus(selmon->sel, 0);
	selmon = m;
	focus(NULL);
}

void
focusstack(const Arg *arg)
{
	Client *c = NULL, *i;

	if (!selmon->sel || (selmon->sel->isfullscreen && selmon->sel->fakefullscreen != 1)) {
		return;
	}
	if (arg->i > 0) {
		for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
		if (!c)
			for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
	} else {
		for (i = selmon->clients; i != selmon->sel; i = i->next)
			if (ISVISIBLE(i)) {
				c = i;
			}
		if (!c)
			for (; i; i = i->next)
				if (ISVISIBLE(i)) {
					c = i;
				}
	}
	if (c) {
		focus(c);
		restack(selmon);
	}
}

Atom
getatomprop(Client *c, Atom prop)
{
	int di;
	unsigned long dl;
	unsigned char *p = NULL;
	Atom da, atom = None;

	/* FIXME getatomprop should return the number of items and a pointer to
	 * the stored data instead of this workaround */
	Atom req = XA_ATOM;
	if (prop == xatom[XembedInfo]) {
		req = xatom[XembedInfo];
	}

	if (XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, req,
	                       &da, &di, &dl, &dl, &p) == Success && p) {
		atom = *(Atom *)p;
		if (da == xatom[XembedInfo] && dl == 2) {
			atom = ((Atom *)p)[1];
		}
		XFree(p);
	}
	return atom;
}

static uint32_t prealpha(uint32_t p) {
	uint8_t a = p >> 24u;
	uint32_t rb = (a * (p & 0xFF00FFu)) >> 8u;
	uint32_t g = (a * (p & 0x00FF00u)) >> 8u;
	return (rb & 0xFF00FFu) | (g & 0x00FF00u) | (a << 24u);
}

Picture
geticonprop(Window win, unsigned int *picw, unsigned int *pich)
{
	int format;
	unsigned long n, extra, *p = NULL;
	Atom real;

	if (XGetWindowProperty(dpy, win, netatom[NetWMIcon], 0L, LONG_MAX, False, AnyPropertyType, 
						   &real, &format, &n, &extra, (unsigned char **)&p) != Success)
		return None; 
	if (n == 0 || format != 32) { XFree(p); return None; }

	unsigned long *bstp = NULL;
	uint32_t w, h, sz;
	{
		unsigned long *i; const unsigned long *end = p + n;
		uint32_t bstd = UINT32_MAX, d, m;
		for (i = p; i < end - 1; i += sz) {
			if ((w = *i++) >= 16384 || (h = *i++) >= 16384) { XFree(p); return None; }
			if ((sz = w * h) > end - i) break;
			if ((m = w > h ? w : h) >= ICONSIZE && (d = m - ICONSIZE) < bstd) { bstd = d; bstp = i; }
		}
		if (!bstp) {
			for (i = p; i < end - 1; i += sz) {
				if ((w = *i++) >= 16384 || (h = *i++) >= 16384) { XFree(p); return None; }
				if ((sz = w * h) > end - i) break;
				if ((d = ICONSIZE - (w > h ? w : h)) < bstd) { bstd = d; bstp = i; }
			}
		}
		if (!bstp) { XFree(p); return None; }
	}

	if ((w = *(bstp - 2)) == 0 || (h = *(bstp - 1)) == 0) { XFree(p); return None; }

	uint32_t icw, ich;
	if (w <= h) {
		ich = ICONSIZE; icw = w * ICONSIZE / h;
		if (icw == 0) icw = 1;
	}
	else {
		icw = ICONSIZE; ich = h * ICONSIZE / w;
		if (ich == 0) ich = 1;
	}
	*picw = icw; *pich = ich;

	uint32_t i, *bstp32 = (uint32_t *)bstp;
	for (sz = w * h, i = 0; i < sz; ++i) bstp32[i] = prealpha(bstp[i]);

	Picture ret = drw_picture_create_resized(drw, (char *)bstp, w, h, icw, ich);
	XFree(p);

	return ret;
}

int
getrootptr(int *x, int *y)
{
	int di;
	unsigned int dui;
	Window dummy;

	return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
}

long
getstate(Window w)
{
	int format;
	long result = -1;
	unsigned char *p = NULL;
	unsigned long n, extra;
	Atom real;

	if (XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
	                       &real, &format, &n, &extra, (unsigned char **)&p) != Success) {
		return -1;
	}
	if (n != 0) {
		result = *p;
	}
	XFree(p);
	return result;
}

unsigned int
getsystraywidth()
{
	unsigned int w = 0;
	Client *i;
	if (showsystray)
		for (i = systray->icons; i; w += i->w + systrayspacing, i = i->next);
	return w ? w + systrayspacing : 0;
}

int
gettextprop(Window w, Atom atom, char *text, unsigned int size)
{
	char **list = NULL;
	int n;
	XTextProperty name;

	if (!text || size == 0) {
		return 0;
	}
	text[0] = '\0';
	if (!XGetTextProperty(dpy, w, &name, atom) || !name.nitems) {
		return 0;
	}
	if (name.encoding == XA_STRING) {
		strncpy(text, (char *)name.value, size - 1);
	} else if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
		strncpy(text, *list, size - 1);
		XFreeStringList(list);
	}
	text[size - 1] = '\0';
	XFree(name.value);
	return 1;
}

void
grabbuttons(Client *c, int focused)
{
	updatenumlockmask();
	{
		unsigned int i, j;
		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask | LockMask };
		XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
		if (!focused)
			XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
			            BUTTONMASK, GrabModeSync, GrabModeSync, None, None);
		for (i = 0; i < LENGTH(buttons); i++)
			if (buttons[i].click == ClkClientWin)
				for (j = 0; j < LENGTH(modifiers); j++)
					XGrabButton(dpy, buttons[i].button,
					            buttons[i].mask | modifiers[j],
					            c->win, False, BUTTONMASK,
					            GrabModeAsync, GrabModeSync, None, None);
	}
}

void
grabkeys(void)
{
	updatenumlockmask();
	{
		unsigned int i, j, k;
		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask | LockMask };
		int start, end, skip;
		KeySym *syms;

		XUngrabKey(dpy, AnyKey, AnyModifier, root);
		XDisplayKeycodes(dpy, &start, &end);
		syms = XGetKeyboardMapping(dpy, start, end - start + 1, &skip);
		if (!syms) {
			return;
		}
		for (k = start; k <= end; k++)
			for (i = 0; i < LENGTH(keys); i++)
				/* skip modifier codes, we do that ourselves */
				if (keys[i].keysym == syms[(k - start) * skip])
					for (j = 0; j < LENGTH(modifiers); j++)
						XGrabKey(dpy, k,
						         keys[i].mod | modifiers[j],
						         root, True,
						         GrabModeAsync, GrabModeAsync);
		XFree(syms);
	}
}

void
incnmaster(const Arg *arg)
{
	selmon->nmaster = selmon->pertag->nmasters[selmon->pertag->curtag] = MAX(selmon->nmaster + arg->i, 0);
	arrange(selmon);
}

#ifdef XINERAMA
static int
isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info)
{
	while (n--)
		if (unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
		                && unique[n].width == info->width && unique[n].height == info->height) {
			return 0;
		}
	return 1;
}
#endif /* XINERAMA */

void
keypress(XEvent *e)
{
	unsigned int i;
	KeySym keysym;
	XKeyEvent *ev;

	ev = &e->xkey;
	keysym = XkbKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0, 0);
	for (i = 0; i < LENGTH(keys); i++)
		if (keysym == keys[i].keysym
		                && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
		                && keys[i].func) {
			keys[i].func(&(keys[i].arg));
		}
}

void
killclient(const Arg *arg)
{
	if (!selmon->sel) {
		return;
	}
	if (!sendevent(selmon->sel->win, wmatom[WMDelete], NoEventMask, wmatom[WMDelete], CurrentTime, 0, 0, 0)) {
		XGrabServer(dpy);
		XSetErrorHandler(xerrordummy);
		XSetCloseDownMode(dpy, DestroyAll);
		XKillClient(dpy, selmon->sel->win);
		XSync(dpy, False);
		XSetErrorHandler(xerror);
		XUngrabServer(dpy);
	}
}

void
loadxrdb()
{
	Display *display;
	char * resm;
	XrmDatabase xrdb;
	char *type;
	XrmValue value;

	display = XOpenDisplay(NULL);

	if (display != NULL) {
		resm = XResourceManagerString(display);

		if (resm != NULL) {
			xrdb = XrmGetStringDatabase(resm);

			if (xrdb != NULL) {
				XRDB_LOAD_COLOR("dwm.color0", normbordercolor);
				XRDB_LOAD_COLOR("dwm.color0", normbgcolor);
				XRDB_LOAD_COLOR("dwm.color6", normfgcolor);
				XRDB_LOAD_COLOR("dwm.color8", selbordercolor);
				XRDB_LOAD_COLOR("dwm.color0", selfgcolor);
				XRDB_LOAD_COLOR("dwm.color14", selbgcolor);
				XRDB_LOAD_COLOR("dwm.color7", btnfgcolor);
				XRDB_LOAD_COLOR("dwm.color0", btnbgcolor);
				XRDB_LOAD_COLOR("dwm.color0", titlebgcolor);
				XRDB_LOAD_COLOR("dwm.color6", titlefgcolor);
			}
		}
	}

	XCloseDisplay(display);
}

void
losefullscreen(Client *next)
{
	Client *sel = selmon->sel;
	if (!sel || !next) {
		return;
	}
	if (sel->isfullscreen && sel->fakefullscreen != 1 && ISVISIBLE(sel) && sel->mon == next->mon && !next->isfloating) {
		setfullscreen(sel, 0);
	}
}

void
layoutmenu(const Arg *arg)
{
	FILE *p;
	char c[3], *s;
	int i;

	if (!(p = popen(layoutmenu_cmd, "r"))) {
		return;
	}
	s = fgets(c, sizeof(c), p);
	pclose(p);

	if (!s || *s == '\0' || c[0] == '\0') {
		return;
	}

	i = atoi(c);
	setlayout(&((Arg) {
		.v = &layouts[i]
	}));
}

void
manage(Window w, XWindowAttributes *wa)
{
	Client *c, *t = NULL, *term = NULL;
	Window trans = None;
	XWindowChanges wc;

	c = ecalloc(1, sizeof(Client));
	c->win = w;
	c->pid = winpid(w);
	/* geometry */
	c->x = c->oldx = wa->x;
	c->y = c->oldy = wa->y;
	c->w = c->oldw = wa->width;
	c->h = c->oldh = wa->height;
	c->oldbw = wa->border_width;
	c->cfact = 1.0;

	updateicon(c);
	updatetitle(c);
	if (XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
		c->mon = t->mon;
		c->tags = t->tags;
	} else {
		c->mon = selmon;
		applyrules(c);
		term = termforwin(c);
	}

	if (c->x + WIDTH(c) > c->mon->wx + c->mon->ww) {
		c->x = c->mon->wx + c->mon->ww - WIDTH(c);
	}
	if (c->y + HEIGHT(c) > c->mon->wy + c->mon->wh) {
		c->y = c->mon->wy + c->mon->wh - HEIGHT(c);
	}
	c->x = MAX(c->x, c->mon->wx);
	c->y = MAX(c->y, c->mon->wy);
	c->bw = borderpx;

	selmon->tagset[selmon->seltags] &= ~scratchtag;
	if (!strcmp(c->name, scratchpadname)) {
		c->mon->tagset[c->mon->seltags] |= c->tags = scratchtag;
		c->isfloating = True;
		c->x = c->mon->wx + (c->mon->ww / 2 - WIDTH(c) / 2);
		c->y = c->mon->wy + (c->mon->wh / 2 - HEIGHT(c) / 2);
	}

	wc.border_width = c->bw;
	XConfigureWindow(dpy, w, CWBorderWidth, &wc);
	XSetWindowBorder(dpy, w, scheme[SchemeNorm][ColBorder].pixel);
	configure(c); /* propagates border_width, if size doesn't change */
	updatewindowtype(c);
	updatesizehints(c);
	updatewmhints(c);
	{
		int format;
		unsigned long *data, n, extra;
		Monitor *m;
		Atom atom;
		if (XGetWindowProperty(dpy, c->win, netatom[NetClientInfo], 0L, 2L, False, XA_CARDINAL,
				&atom, &format, &n, &extra, (unsigned char **)&data) == Success && n == 2) {
			c->tags = *data;
			for (m = mons; m; m = m->next) {
				if (m->num == *(data+1)) {
					c->mon = m;
					break;
				}
			}
		}
		if (n > 0)
			XFree(data);
	}
	if (c->iscentered) {
		c->x = c->mon->mx + (c->mon->mw - WIDTH(c)) / 2;
		c->y = c->mon->my + (c->mon->mh - HEIGHT(c)) / 2;
	}
	setclienttagprop(c);
	XSelectInput(dpy, w, EnterWindowMask | FocusChangeMask | PropertyChangeMask | StructureNotifyMask);
	grabbuttons(c, 0);
	if (!c->isfloating) {
		c->isfloating = c->oldstate = trans != None || c->isfixed;
	}
	if (c->isfloating) {
		XRaiseWindow(dpy, c->win);
	}
	attach(c);
	attachstack(c);
	XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
	                (unsigned char *) & (c->win), 1);
	XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
	setclientstate(c, NormalState);
	if (c->mon == selmon) {
		losefullscreen(c);
		unfocus(selmon->sel, 0);
	}
	c->mon->sel = c;
	arrange(c->mon);
	XMapWindow(dpy, c->win);
	if (term) {
		swallow(term, c);
	}
	focus(NULL);
}

void
mappingnotify(XEvent *e)
{
	XMappingEvent *ev = &e->xmapping;

	XRefreshKeyboardMapping(ev);
	if (ev->request == MappingKeyboard) {
		grabkeys();
	}
}

void
maprequest(XEvent *e)
{
	static XWindowAttributes wa;
	XMapRequestEvent *ev = &e->xmaprequest;

	Client *i;
	if (showsystray && (i = wintosystrayicon(ev->window))) {
		sendevent(i->win, netatom[Xembed], StructureNotifyMask, CurrentTime, XEMBED_WINDOW_ACTIVATE, 0, systray->win, XEMBED_EMBEDDED_VERSION);
		updatesystray(1);
	}

	if (!XGetWindowAttributes(dpy, ev->window, &wa) || wa.override_redirect) {
		return;
	}
	if (!wintoclient(ev->window)) {
		manage(ev->window, &wa);
	}
}

void
monocle(Monitor *m)
{
	unsigned int n = 0;
	Client *c;

	for (c = m->clients; c; c = c->next)
		if (ISVISIBLE(c)) {
			n++;
		}
	if (n > 0) { /* override layout symbol */
		snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
	}
	for (c = nexttiled(m->clients); c; c = nexttiled(c->next)) {
		resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
	}
}

void
motionnotify(XEvent *e)
{
	static Monitor *mon = NULL;
	Monitor *m;
	XMotionEvent *ev = &e->xmotion;

	if (ev->window != root) {
		return;
	}
	if ((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
		unfocus(selmon->sel, 1);
		selmon = m;
		focus(NULL);
	}
	mon = m;
}

void
movemouse(const Arg *arg)
{
	int x, y, ocx, ocy, nx, ny;
	Client *c;
	Monitor *m;
	XEvent ev;
	Time lasttime = 0;

	if (!(c = selmon->sel)) {
		return;
	}
	if (c->isfullscreen && c->fakefullscreen != 1) { /* no support moving fullscreen windows by mouse */
		return;
	}
	restack(selmon);
	ocx = c->x;
	ocy = c->y;
	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
	                 None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess) {
		return;
	}
	if (!getrootptr(&x, &y)) {
		return;
	}
	do {
		XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
		switch (ev.type) {
		case ConfigureRequest:
		case Expose:
		case MapRequest:
			handler[ev.type](&ev);
			break;
		case MotionNotify:
			if ((ev.xmotion.time - lasttime) <= (1000 / 1000)) {
				continue;
			}
			lasttime = ev.xmotion.time;

			nx = ocx + (ev.xmotion.x - x);
			ny = ocy + (ev.xmotion.y - y);
			if (abs(selmon->wx - nx) < snap) {
				nx = selmon->wx;
			} else if (abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap) {
				nx = selmon->wx + selmon->ww - WIDTH(c);
			}
			if (abs(selmon->wy - ny) < snap) {
				ny = selmon->wy;
			} else if (abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap) {
				ny = selmon->wy + selmon->wh - HEIGHT(c);
			}
			if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
			                && (abs(nx - c->x) > snap || abs(ny - c->y) > snap)) {
				togglefloating(NULL);
			}
			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating) {
				resize(c, nx, ny, c->w, c->h, 1);
			}
			break;
		}
	} while (ev.type != ButtonRelease);
	XUngrabPointer(dpy, CurrentTime);
	if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
		sendmon(c, m);
		selmon = m;
		focus(NULL);
	}
}

void
moveresize(const Arg *arg)
{
	/* only floating windows can be moved */
	Client *c;
	c = selmon->sel;
	int x, y, w, h, nx, ny, nw, nh, ox, oy, ow, oh;
	char xAbs, yAbs, wAbs, hAbs;
	int msx, msy, dx, dy, nmx, nmy;
	unsigned int dui;
	Window dummy;

	if (!c || !arg) {
		return;
	}
	if (selmon->lt[selmon->sellt]->arrange && !c->isfloating) {
		return;
	}
	if (sscanf((char *)arg->v, "%d%c %d%c %d%c %d%c", &x, &xAbs, &y, &yAbs, &w, &wAbs, &h, &hAbs) != 8) {
		return;
	}

	/* compute new window position; prevent window from be positioned outside the current monitor */
	nw = c->w + w;
	if (wAbs == 'W') {
		nw = w < selmon->mw - 2 * c->bw ? w : selmon->mw - 2 * c->bw;
	}

	nh = c->h + h;
	if (hAbs == 'H') {
		nh = h < selmon->mh - 2 * c->bw ? h : selmon->mh - 2 * c->bw;
	}

	nx = c->x + x;
	if (xAbs == 'X') {
		if (x < selmon->mx) {
			nx = selmon->mx;
		} else if (x > selmon->mx + selmon->mw) {
			nx = selmon->mx + selmon->mw - nw - 2 * c->bw;
		} else {
			nx = x;
		}
	}

	ny = c->y + y;
	if (yAbs == 'Y') {
		if (y < selmon->my) {
			ny = selmon->my;
		} else if (y > selmon->my + selmon->mh) {
			ny = selmon->my + selmon->mh - nh - 2 * c->bw;
		} else {
			ny = y;
		}
	}

	ox = c->x;
	oy = c->y;
	ow = c->w;
	oh = c->h;

	XRaiseWindow(dpy, c->win);
	bool xqp = XQueryPointer(dpy, root, &dummy, &dummy, &msx, &msy, &dx, &dy, &dui);
	resize(c, nx, ny, nw, nh, True);

	/* move cursor along with the window to avoid problems caused by the sloppy focus */
	if (xqp && ox <= msx && (ox + ow) >= msx && oy <= msy && (oy + oh) >= msy) {
		nmx = c->x - ox + c->w - ow;
		nmy = c->y - oy + c->h - oh;
		XWarpPointer(dpy, None, None, 0, 0, 0, 0, nmx, nmy);
	}
}

Client *
nexttiled(Client *c)
{
	for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
	return c;
}

void
pop(Client *c)
{
	detach(c);
	attach(c);
	focus(c);
	arrange(c->mon);
}

void
propertynotify(XEvent *e)
{
	Client *c;
	Window trans;
	XPropertyEvent *ev = &e->xproperty;

	if (showsystray && (c = wintosystrayicon(ev->window))) {
		if (ev->atom == XA_WM_NORMAL_HINTS) {
			updatesizehints(c);
			updatesystrayicongeom(c, c->w, c->h);
		} else {
			updatesystrayiconstate(c, ev);
		}
		updatesystray(1);
	}

	if ((ev->window == root) && (ev->atom == XA_WM_NAME)) {
		updatestatus();
	} else if (ev->state == PropertyDelete) {
		return;        /* ignore */
	} else if ((c = wintoclient(ev->window))) {
		switch (ev->atom) {
		default:
			break;
		case XA_WM_TRANSIENT_FOR:
			if (!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
			                (c->isfloating = (wintoclient(trans)) != NULL)) {
				arrange(c->mon);
			}
			break;
		case XA_WM_NORMAL_HINTS:
			c->hintsvalid = 0;
			break;
		case XA_WM_HINTS:
			updatewmhints(c);
			drawbars();
			break;
		}
		if (ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
			updatetitle(c);
			if (c == c->mon->sel) {
				drawbar(c->mon);
			}
		}
		else if (ev->atom == netatom[NetWMIcon]) {
			updateicon(c);
			if (c == c->mon->sel)
				drawbar(c->mon);
		}
		if (ev->atom == netatom[NetWMWindowType]) {
			updatewindowtype(c);
		}
	}
}

void
quit(const Arg *arg)
{
	if(arg->i) restart = 1;
	running = 0;
}

Monitor *
recttomon(int x, int y, int w, int h)
{
	Monitor *m, *r = selmon;
	int a, area = 0;

	for (m = mons; m; m = m->next)
		if ((a = INTERSECT(x, y, w, h, m)) > area) {
			area = a;
			r = m;
		}
	return r;
}

void
removesystrayicon(Client *i)
{
	Client **ii;

	if (!showsystray || !i) {
		return;
	}
	for (ii = &systray->icons; *ii && *ii != i; ii = &(*ii)->next);
	if (ii) {
		*ii = i->next;
	}
	free(i);
}

void
reorganizetags(const Arg *arg) {
	Client *c;
	unsigned int occ, unocc, i;
	unsigned int tagdest[LENGTH(tags)];

	occ = 0;
	for (c = selmon->clients; c; c = c->next)
		occ |= (1 << (ffs(c->tags)-1));
	unocc = 0;
	for (i = 0; i < LENGTH(tags); ++i) {
		while (unocc < i && (occ & (1 << unocc)))
			unocc++;
		if (occ & (1 << i)) {
			tagdest[i] = unocc;
			occ &= ~(1 << i);
			occ |= 1 << unocc;
		}
	}

	for (c = selmon->clients; c; c = c->next)
		c->tags = 1 << tagdest[ffs(c->tags)-1];
	if (selmon->sel)
		selmon->tagset[selmon->seltags] = selmon->sel->tags;
	arrange(selmon);
}

void
resize(Client *c, int x, int y, int w, int h, int interact)
{
	if (applysizehints(c, &x, &y, &w, &h, interact)) {
		resizeclient(c, x, y, w, h);
	}
}

void
resizeclient(Client *c, int x, int y, int w, int h)
{
	XWindowChanges wc;

	c->oldx = c->x;
	c->x = wc.x = x;
	c->oldy = c->y;
	c->y = wc.y = y;
	c->oldw = c->w;
	c->w = wc.width = w;
	c->oldh = c->h;
	c->h = wc.height = h;
	wc.border_width = c->bw;
	XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
	configure(c);
	XSync(dpy, False);
}

void
resizemouse(const Arg *arg)
{
	int ocx, ocy, nw, nh;
	Client *c;
	Monitor *m;
	XEvent ev;
	Time lasttime = 0;

	if (!(c = selmon->sel)) {
		return;
	}
	if (c->isfullscreen && c->fakefullscreen != 1) { /* no support resizing fullscreen windows by mouse */
		return;
	}
	restack(selmon);
	ocx = c->x;
	ocy = c->y;
	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
	                 None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess) {
		return;
	}
	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
	do {
		XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
		switch (ev.type) {
		case ConfigureRequest:
		case Expose:
		case MapRequest:
			handler[ev.type](&ev);
			break;
		case MotionNotify:
			if ((ev.xmotion.time - lasttime) <= (1000 / 60)) {
				continue;
			}
			lasttime = ev.xmotion.time;

			nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
			nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
			if (c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
			                && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh) {
				if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
				                && (abs(nw - c->w) > snap || abs(nh - c->h) > snap)) {
					togglefloating(NULL);
				}
			}
			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating) {
				resize(c, c->x, c->y, nw, nh, 1);
			}
			break;
		}
	} while (ev.type != ButtonRelease);
	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
	XUngrabPointer(dpy, CurrentTime);
	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
	if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
		sendmon(c, m);
		selmon = m;
		focus(NULL);
	}
}

void
resizerequest(XEvent *e)
{
	XResizeRequestEvent *ev = &e->xresizerequest;
	Client *i;

	if ((i = wintosystrayicon(ev->window))) {
		updatesystrayicongeom(i, ev->width, ev->height);
		updatesystray(1);
	}
}

void
restack(Monitor *m)
{
	Client *c;
	XEvent ev;
	XWindowChanges wc;

	drawbar(m);
	if (!m->sel) {
		return;
	}
	if (m->sel->isfloating || !m->lt[m->sellt]->arrange) {
		XRaiseWindow(dpy, m->sel->win);
	}
	if (m->lt[m->sellt]->arrange) {
		wc.stack_mode = Below;
		wc.sibling = m->barwin;
		for (c = m->stack; c; c = c->snext)
			if (!c->isfloating && ISVISIBLE(c)) {
				XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
				wc.sibling = c->win;
			}
	}
	XSync(dpy, False);
	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
}

void
run(void)
{
	XEvent ev;
	/* main event loop */
	XSync(dpy, False);
	while (running && !XNextEvent(dpy, &ev))
		if (handler[ev.type]) {
			handler[ev.type](&ev);        /* call handler */
		}
}

void
scan(void)
{
	unsigned int i, num;
	Window d1, d2, *wins = NULL;
	XWindowAttributes wa;

	if (XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
		for (i = 0; i < num; i++) {
			if (!XGetWindowAttributes(dpy, wins[i], &wa)
			                || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1)) {
				continue;
			}
			if (wa.map_state == IsViewable || getstate(wins[i]) == IconicState) {
				manage(wins[i], &wa);
			}
		}
		for (i = 0; i < num; i++) { /* now the transients */
			if (!XGetWindowAttributes(dpy, wins[i], &wa)) {
				continue;
			}
			if (XGetTransientForHint(dpy, wins[i], &d1)
			                && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)) {
				manage(wins[i], &wa);
			}
		}
		if (wins) {
			XFree(wins);
		}
	}
}

void
sendmon(Client *c, Monitor *m)
{
	if (c->mon == m) {
		return;
	}
	unfocus(c, 1);
	detach(c);
	detachstack(c);
	c->mon = m;
	c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
	attach(c);
	attachstack(c);
	setclienttagprop(c);
	focus(NULL);
	arrange(NULL);
}

void
setclientstate(Client *c, long state)
{
	long data[] = { state, None };

	XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
	                PropModeReplace, (unsigned char *)data, 2);
}

int
sendevent(Window w, Atom proto, int mask, long d0, long d1, long d2, long d3, long d4)
{
	int n;
	Atom *protocols, mt;
	int exists = 0;
	XEvent ev;

	if (proto == wmatom[WMTakeFocus] || proto == wmatom[WMDelete]) {
		mt = wmatom[WMProtocols];
		if (XGetWMProtocols(dpy, w, &protocols, &n)) {
			while (!exists && n--) {
				exists = protocols[n] == proto;
			}
			XFree(protocols);
		}
	} else {
		exists = True;
		mt = proto;
	}
	if (exists) {
		ev.type = ClientMessage;
		ev.xclient.window = w;
		ev.xclient.message_type = mt;
		ev.xclient.format = 32;
		ev.xclient.data.l[0] = d0;
		ev.xclient.data.l[1] = d1;
		ev.xclient.data.l[2] = d2;
		ev.xclient.data.l[3] = d3;
		ev.xclient.data.l[4] = d4;
		XSendEvent(dpy, w, False, mask, &ev);
	}
	return exists;
}

void
setfocus(Client *c)
{
	if (!c->neverfocus) {
		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
		XChangeProperty(dpy, root, netatom[NetActiveWindow],
		                XA_WINDOW, 32, PropModeReplace,
		                (unsigned char *) & (c->win), 1);
	}
	sendevent(c->win, wmatom[WMTakeFocus], NoEventMask, wmatom[WMTakeFocus], CurrentTime, 0, 0, 0);
}

void
setfullscreen(Client *c, int fullscreen)
{
	XEvent ev;
	int savestate = 0, restorestate = 0, restorefakefullscreen = 0;

	if ((c->fakefullscreen == 0 && fullscreen && !c->isfullscreen) // normal fullscreen
	                || (c->fakefullscreen == 2 && fullscreen)) { // fake fullscreen --> actual fullscreen
		savestate = 1;        // go actual fullscreen
	} else if ((c->fakefullscreen == 0 && !fullscreen && c->isfullscreen) // normal fullscreen exit
	                || (c->fakefullscreen >= 2 && !fullscreen)) { // fullscreen exit --> fake fullscreen
		restorestate = 1;        // go back into tiled
	}

	/* If leaving fullscreen and the window was previously fake fullscreen (2), then restore
	 * that while staying in fullscreen. The exception to this is if we are in said state, but
	 * the client itself disables fullscreen (3) then we let the client go out of fullscreen
	 * while keeping fake fullscreen enabled (as otherwise there will be a mismatch between the
	 * client and the window manager's perception of the client's fullscreen state). */
	if (c->fakefullscreen == 2 && !fullscreen && c->isfullscreen) {
		restorefakefullscreen = 1;
		c->isfullscreen = 1;
		fullscreen = 1;
	}

	if (fullscreen != c->isfullscreen) { // only send property change if necessary
		if (fullscreen)
			XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
			                PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
		else
			XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
			                PropModeReplace, (unsigned char*)0, 0);
	}

	c->isfullscreen = fullscreen;

	/* Some clients, e.g. firefox, will send a client message informing the window manager
	 * that it is going into fullscreen after receiving the above signal. This has the side
	 * effect of this function (setfullscreen) sometimes being called twice when toggling
	 * fullscreen on and off via the window manager as opposed to the application itself.
	 * To protect against obscure issues where the client settings are stored or restored
	 * when they are not supposed to we add an additional bit-lock on the old state so that
	 * settings can only be stored and restored in that precise order. */
	if (savestate && !(c->oldstate & (1 << 1))) {
		c->oldbw = c->bw;
		c->oldstate = c->isfloating | (1 << 1);
		c->bw = 0;
		c->isfloating = 1;
		resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
		XRaiseWindow(dpy, c->win);
	} else if (restorestate && (c->oldstate & (1 << 1))) {
		c->bw = c->oldbw;
		c->isfloating = c->oldstate = c->oldstate & 1;
		if (restorefakefullscreen || c->fakefullscreen == 3) {
			c->fakefullscreen = 1;
		}
		/* The client may have been moved to another monitor whilst in fullscreen which if tiled
		 * we address by doing a full arrange of tiled clients. If the client is floating then the
		 * height and width may be larger than the monitor's window area, so we cap that by
		 * ensuring max / min values. */
		if (c->isfloating) {
			c->x = MAX(c->mon->wx, c->oldx);
			c->y = MAX(c->mon->wy, c->oldy);
			c->w = MIN(c->mon->ww - c->x - 2 * c->bw, c->oldw);
			c->h = MIN(c->mon->wh - c->y - 2 * c->bw, c->oldh);
			resizeclient(c, c->x, c->y, c->w, c->h);
			restack(c->mon);
		} else {
			arrange(c->mon);
		}
	} else {
		resizeclient(c, c->x, c->y, c->w, c->h);
	}

	/* Exception: if the client was in actual fullscreen and we exit out to fake fullscreen
	 * mode, then the focus would sometimes drift to whichever window is under the mouse cursor
	 * at the time. To avoid this we ask X for all EnterNotify events and just ignore them.
	 */
	if (!c->isfullscreen)
		while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
}

void
setlayout(const Arg *arg)
{
	if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt]) {
		selmon->pertag->sellts[selmon->pertag->curtag] ^= 1;
		selmon->sellt = selmon->pertag->sellts[selmon->pertag->curtag];
	}
	if (arg && arg->v) {
		selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt] = (Layout *)arg->v;
	}
	selmon->lt[selmon->sellt] = selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt];
	strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
	if (selmon->sel) {
		arrange(selmon);
	} else {
		drawbar(selmon);
	}
}

void
setcfact(const Arg *arg)
{
	float f;
	Client *c;

	c = selmon->sel;

	if (!arg || !c || !selmon->lt[selmon->sellt]->arrange) {
		return;
	}
	f = arg->f + c->cfact;
	if (arg->f == 0.0) {
		f = 1.0;
	} else if (f < 0.25 || f > 4.0) {
		return;
	}
	c->cfact = f;
	arrange(selmon);
}

/* arg > 1.0 will set mfact absolutely */
void
setmfact(const Arg *arg)
{
	float f;

	if (!arg || !selmon->lt[selmon->sellt]->arrange) {
		return;
	}
	f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
	if (f < 0.05 || f > 0.95) {
		return;
	}
	selmon->mfact = selmon->pertag->mfacts[selmon->pertag->curtag] = f;
	arrange(selmon);
}

void
setup(void)
{
	int i;
	XSetWindowAttributes wa;
	Atom utf8string;
	struct sigaction sa;

	/* do not transform children into zombies when they terminate */
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_NOCLDSTOP | SA_NOCLDWAIT | SA_RESTART;
	sa.sa_handler = SIG_IGN;
	sigaction(SIGCHLD, &sa, NULL);

	/* clean up any zombies (inherited from .xinitrc etc) immediately */
	while (waitpid(-1, NULL, WNOHANG) > 0);

	signal(SIGHUP, sighup);
	signal(SIGTERM, sigterm);

	/* init screen */
	screen = DefaultScreen(dpy);
	sw = DisplayWidth(dpy, screen);
	sh = DisplayHeight(dpy, screen);
	root = RootWindow(dpy, screen);
	xinitvisual();
	drw = drw_create(dpy, screen, root, sw, sh, visual, depth, cmap);
	if (!drw_fontset_create(drw, fonts, LENGTH(fonts))) {
		die("no fonts could be loaded.");
	}
	lrpad = drw->fonts->h + horizpadbar;
	bh = drw->fonts->h + vertpadbar;
	updategeom();
	/* init atoms */
	utf8string = XInternAtom(dpy, "UTF8_STRING", False);
	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
	wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
	netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
	netatom[NetSystemTray] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_S0", False);
	netatom[NetSystemTrayOP] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_OPCODE", False);
	netatom[NetSystemTrayOrientation] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_ORIENTATION", False);
	netatom[NetSystemTrayOrientationHorz] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_ORIENTATION_HORZ", False);
	netatom[NetSystemTrayVisual] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_VISUAL", False);
	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
	netatom[NetWMIcon] = XInternAtom(dpy, "_NET_WM_ICON", False);
	netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
	netatom[NetWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
	netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
	netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
	netatom[NetWMWindowTypeDock] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DOCK", False);
	netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
	netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
	netatom[NetClientInfo] = XInternAtom(dpy, "_NET_CLIENT_INFO", False);
	xatom[Manager] = XInternAtom(dpy, "MANAGER", False);
	xatom[Xembed] = XInternAtom(dpy, "_XEMBED", False);
	xatom[XembedInfo] = XInternAtom(dpy, "_XEMBED_INFO", False);
	/* init cursors */
	cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
	cursor[CurResize] = drw_cur_create(drw, XC_sizing);
	cursor[CurMove] = drw_cur_create(drw, XC_fleur);
	/* init appearance */
	scheme = ecalloc(LENGTH(colors) + 1, sizeof(Clr *));
	scheme[LENGTH(colors)] = drw_scm_create(drw, colors[0], alphas[0], 3);
	for (i = 0; i < LENGTH(colors); i++) {
		scheme[i] = drw_scm_create(drw, colors[i], alphas[i], 3);
	}
	/* init system tray */
	if (showsystray) {
		updatesystray(0);
	}
	/* init bars */
	updatebars();
	updatestatus();
	/* supporting window for NetWMCheck */
	wmcheckwin = XCreateSimpleWindow(dpy, root, 0, 0, 1, 1, 0, 0, 0);
	XChangeProperty(dpy, wmcheckwin, netatom[NetWMCheck], XA_WINDOW, 32,
	                PropModeReplace, (unsigned char *) &wmcheckwin, 1);
	XChangeProperty(dpy, wmcheckwin, netatom[NetWMName], utf8string, 8,
	                PropModeReplace, (unsigned char *) "dwm", 3);
	XChangeProperty(dpy, root, netatom[NetWMCheck], XA_WINDOW, 32,
	                PropModeReplace, (unsigned char *) &wmcheckwin, 1);
	/* EWMH support per view */
	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
	                PropModeReplace, (unsigned char *) netatom, NetLast);
	XDeleteProperty(dpy, root, netatom[NetClientList]);
	XDeleteProperty(dpy, root, netatom[NetClientInfo]);
	/* select events */
	wa.cursor = cursor[CurNormal]->cursor;
	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
	                | ButtonPressMask | PointerMotionMask | EnterWindowMask
	                | LeaveWindowMask | StructureNotifyMask | PropertyChangeMask;
	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
	XSelectInput(dpy, root, wa.event_mask);
	grabkeys();
	focus(NULL);
}

void
seturgent(Client *c, int urg)
{
	XWMHints *wmh;

	c->isurgent = urg;
	if (!(wmh = XGetWMHints(dpy, c->win))) {
		return;
	}
	wmh->flags = urg ? (wmh->flags | XUrgencyHint) : (wmh->flags & ~XUrgencyHint);
	XSetWMHints(dpy, c->win, wmh);
	XFree(wmh);
}

void
showhide(Client *c)
{
	if (!c) {
		return;
	}
	if (ISVISIBLE(c)) {
		/* show clients top down */
		XMoveWindow(dpy, c->win, c->x, c->y);
		if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
			resize(c, c->x, c->y, c->w, c->h, 0);
		showhide(c->snext);
	} else {
		/* hide clients bottom up */
		showhide(c->snext);
		XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
	}
}

void
sighup(int unused)
{
	Arg a = {.i = 1};
	quit(&a);
}

void
sigterm(int unused)
{
	Arg a = {.i = 0};
	quit(&a);
}

void
spawn(const Arg *arg)
{
	struct sigaction sa;

	if (arg->v == dmenucmd) {
		dmenumon[0] = '0' + selmon->num;
		selmon->tagset[selmon->seltags] &= ~scratchtag;
	}
	if (fork() == 0) {
		if (dpy) {
			close(ConnectionNumber(dpy));
		}
		setsid();

		sigemptyset(&sa.sa_mask);
		sa.sa_flags = 0;
		sa.sa_handler = SIG_DFL;
		sigaction(SIGCHLD, &sa, NULL);

		execvp(((char **)arg->v)[0], (char **)arg->v);
		die("dwm: execvp '%s' failed:", ((char **)arg->v)[0]);
	}
}

Monitor *
systraytomon(Monitor *m)
{
	Monitor *t;
	int i, n;
	if (!systraypinning) {
		if (!m) {
			return selmon;
		}
		return m == selmon ? m : NULL;
	}
	for (n = 1, t = mons; t && t->next; n++, t = t->next);
	for (i = 1, t = mons; t && t->next && i < systraypinning; i++, t = t->next);
	if (systraypinningfailfirst && n < systraypinning) {
		return mons;
	}
	return t;
}

void
setclienttagprop(Client *c)
{
	long data[] = { (long) c->tags, (long) c->mon->num };
	XChangeProperty(dpy, c->win, netatom[NetClientInfo], XA_CARDINAL, 32,
			PropModeReplace, (unsigned char *) data, 2);
}

void
tag(const Arg *arg)
{
	Client *c;
	if (selmon->sel && arg->ui & TAGMASK) {
		c = selmon->sel;
		selmon->sel->tags = arg->ui & TAGMASK;
		setclienttagprop(c);
		focus(NULL);
		arrange(selmon);
		view(arg);
		if (viewontag && ((arg->ui & TAGMASK) != TAGMASK)) {
			view(arg);
		}
	}
}

void
tagmon(const Arg *arg)
{
	Client *c = selmon->sel;
	if (!c || !mons->next) {
		return;
	}
	if (c->isfullscreen) {
		c->isfullscreen = 0;
		sendmon(c, dirtomon(arg->i));
		c->isfullscreen = 1;
		if (c->fakefullscreen != 1) {
			resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
			XRaiseWindow(dpy, c->win);
		}
	} else {
		sendmon(c, dirtomon(arg->i));
	}
}

void
togglebar(const Arg *arg)
{
	selmon->showbar = selmon->pertag->showbars[selmon->pertag->curtag] = !selmon->showbar;
	updatebarpos(selmon);
	XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
	if (showsystray) {
		XWindowChanges wc;
		if (!selmon->showbar) {
			wc.y = -bh;
		} else if (selmon->showbar) {
#if BARPADDING_PATCH
			wc.y = vp;
			if (!selmon->topbar) {
				wc.y = selmon->mh - bh + vp;
			}
#else
			wc.y = 0;
			if (!selmon->topbar) {
				wc.y = selmon->mh - bh;
			}
#endif // BARPADDING_PATCH
		}
		XConfigureWindow(dpy, systray->win, CWY, &wc);
	}
	arrange(selmon);
}

void
togglefakefullscreen(const Arg *arg)
{
	Client *c = selmon->sel;
	if (!c) {
		return;
	}

	if (c->fakefullscreen != 1 && c->isfullscreen) { // exit fullscreen --> fake fullscreen
		c->fakefullscreen = 2;
		setfullscreen(c, 0);
	} else if (c->fakefullscreen == 1) {
		setfullscreen(c, 0);
		c->fakefullscreen = 0;
	} else {
		c->fakefullscreen = 1;
		setfullscreen(c, 1);
	}
}

void
togglefloating(const Arg *arg)
{
	Client *c = selmon->sel;
	if (!c) {
		return;
	}
	if (c->isfullscreen && c->fakefullscreen != 1) { /* no support for fullscreen windows */
		return;
	}
	c->isfloating = !c->isfloating || c->isfixed;
	if (selmon->sel->isfloating) {
	  // This brings floating window to center. Comment this for default behaviour.
    resizeclient(c, (selmon->mw - selmon->mw * 0.6) / 2,
                 (selmon->mh - selmon->mh * 0.6) / 2, selmon->mw * 0.6,
                 selmon->mh * 0.6);

    // Uncomment this for default behaviour
		// resize(c, c->x, c->y, c->w, c->h, 0);
	}
	arrange(c->mon);
}

void
reset_mfact(const Arg *arg)
{
	Arg new_mfact = {.f = mfact + 1};
	setmfact(&new_mfact);
}

void
togglefullscreen(const Arg *arg)
{
	Client *c = selmon->sel;
	if (!c) {
		return;
	}

	if (c->fakefullscreen == 1) { // fake fullscreen --> fullscreen
		c->fakefullscreen = 2;
		setfullscreen(c, 1);
	} else {
		setfullscreen(c, !c->isfullscreen);
	}
}

void
togglescratch(const Arg *arg)
{
	Client *c;
	unsigned int found = 0;

	for (c = selmon->clients; c && !(found = c->tags & scratchtag); c = c->next);
	if (found) {
		unsigned int newtagset = selmon->tagset[selmon->seltags] ^ scratchtag;
		if (newtagset) {
			selmon->tagset[selmon->seltags] = newtagset;
			focus(NULL);
			arrange(selmon);
		}
		if (ISVISIBLE(c)) {
			focus(c);
			restack(selmon);
		}
	} else {
		spawn(arg);
	}
}

void
toggletag(const Arg *arg)
{
	unsigned int newtags;

	if (!selmon->sel) {
		return;
	}
	newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
	if (newtags) {
		selmon->sel->tags = newtags;
		setclienttagprop(selmon->sel);
		focus(NULL);
		arrange(selmon);
	}
}

void
toggleview(const Arg *arg)
{
	unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
	int i;

	if (newtagset) {
		if (newtagset == ~0) {
			selmon->pertag->prevtag = selmon->pertag->curtag;
			selmon->pertag->curtag = 0;
		}
		/* test if the user did not select the same tag */
		if (!(newtagset & 1 << (selmon->pertag->curtag - 1))) {
			selmon->pertag->prevtag = selmon->pertag->curtag;
			for (i = 0; !(newtagset & 1 << i); i++) ;
			selmon->pertag->curtag = i + 1;
		}
		selmon->tagset[selmon->seltags] = newtagset;

		/* apply settings for this view */
		selmon->nmaster = selmon->pertag->nmasters[selmon->pertag->curtag];
		selmon->mfact = selmon->pertag->mfacts[selmon->pertag->curtag];
		selmon->sellt = selmon->pertag->sellts[selmon->pertag->curtag];
		selmon->lt[selmon->sellt] = selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt];
		selmon->lt[selmon->sellt ^ 1] = selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt ^ 1];
		if (selmon->showbar != selmon->pertag->showbars[selmon->pertag->curtag]) {
			togglebar(NULL);
		}
		focus(NULL);
		arrange(selmon);
	}
}

void
freeicon(Client *c)
{
	if (c->icon) {
		XRenderFreePicture(dpy, c->icon);
		c->icon = None;
	}
}

void
unfocus(Client *c, int setfocus)
{
	if (!c) {
		return;
	}
	grabbuttons(c, 0);
	XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);
	if (setfocus) {
		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
		XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
	}
}

void
unmanage(Client *c, int destroyed)
{
	Monitor *m = c->mon;
	XWindowChanges wc;

	if (c->swallowing) {
		unswallow(c);
		return;
	}

	Client *s = swallowingclient(c->win);
	if (s) {
		free(s->swallowing);
		s->swallowing = NULL;
		arrange(m);
		focus(NULL);
		return;
	}

	detach(c);
	detachstack(c);
	freeicon(c);
	if (!destroyed) {
		wc.border_width = c->oldbw;
		XGrabServer(dpy); /* avoid race conditions */
		XSetErrorHandler(xerrordummy);
		XSelectInput(dpy, c->win, NoEventMask);
		XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
		XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
		setclientstate(c, WithdrawnState);
		XSync(dpy, False);
		XSetErrorHandler(xerror);
		XUngrabServer(dpy);
	}
	free(c);

	if (!s) {
		arrange(m);
		focus(NULL);
		updateclientlist();
	}
}

void
unmapnotify(XEvent *e)
{
	Client *c;
	XUnmapEvent *ev = &e->xunmap;

	if ((c = wintoclient(ev->window))) {
		if (ev->send_event) {
			setclientstate(c, WithdrawnState);
		} else {
			unmanage(c, 0);
		}
	} else if (showsystray && (c = wintosystrayicon(ev->window))) {
		/* KLUDGE! sometimes icons occasionally unmap their windows, but do
		 * _not_ destroy them. We map those windows back */
		XMapRaised(dpy, c->win);
		updatesystray(1);
	}
}

void
updatebars(void)
{
	Monitor *m;
	XSetWindowAttributes wa = {
		.override_redirect = True,
		.background_pixel = 0,
		.border_pixel = 0,
		.colormap = cmap,
		.event_mask = ButtonPressMask | ExposureMask
	};
	XClassHint ch = {"dwm", "dwm"};
	for (m = mons; m; m = m->next) {
		if (m->barwin) {
			continue;
		}
		m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, depth,
		                          InputOutput, visual,
		                          CWOverrideRedirect | CWBackPixel | CWBorderPixel | CWColormap | CWEventMask, &wa);
		XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
		if (showsystray && m == systraytomon(m)) {
			XMapRaised(dpy, systray->win);
		}
		XMapRaised(dpy, m->barwin);
		XSetClassHint(dpy, m->barwin, &ch);
	}
}

void
updatebarpos(Monitor *m)
{
	m->wy = m->my;
	m->wh = m->mh;
	if (m->showbar) {
		m->wh -= bh;
		m->by = m->topbar ? m->wy : m->wy + m->wh;
		m->wy = m->topbar ? m->wy + bh : m->wy;
	} else {
		m->by = -bh;
	}
}

void
updateclientlist(void)
{
	Client *c;
	Monitor *m;

	XDeleteProperty(dpy, root, netatom[NetClientList]);
	for (m = mons; m; m = m->next)
		for (c = m->clients; c; c = c->next)
			XChangeProperty(dpy, root, netatom[NetClientList],
			                XA_WINDOW, 32, PropModeAppend,
			                (unsigned char *) & (c->win), 1);
}

int
updategeom(void)
{
	int dirty = 0;

#ifdef XINERAMA
	if (XineramaIsActive(dpy)) {
		int i, j, n, nn;
		Client *c;
		Monitor *m;
		XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
		XineramaScreenInfo *unique = NULL;

		for (n = 0, m = mons; m; m = m->next, n++);
		/* only consider unique geometries as separate screens */
		unique = ecalloc(nn, sizeof(XineramaScreenInfo));
		for (i = 0, j = 0; i < nn; i++)
			if (isuniquegeom(unique, j, &info[i])) {
				memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
			}
		XFree(info);
		nn = j;

		/* new monitors if nn > n */
		for (i = n; i < nn; i++) {
			for (m = mons; m && m->next; m = m->next);
			if (m) {
				m->next = createmon();
			} else {
				mons = createmon();
			}
		}
		for (i = 0, m = mons; i < nn && m; m = m->next, i++)
			if (i >= n
			                || unique[i].x_org != m->mx || unique[i].y_org != m->my
			                || unique[i].width != m->mw || unique[i].height != m->mh) {
				dirty = 1;
				m->num = i;
				m->mx = m->wx = unique[i].x_org;
				m->my = m->wy = unique[i].y_org;
				m->mw = m->ww = unique[i].width;
				m->mh = m->wh = unique[i].height;
				updatebarpos(m);
			}
		/* removed monitors if n > nn */
		for (i = nn; i < n; i++) {
			for (m = mons; m && m->next; m = m->next);
			while ((c = m->clients)) {
				dirty = 1;
				m->clients = c->next;
				detachstack(c);
				c->mon = mons;
				attach(c);
				attachstack(c);
			}
			if (m == selmon) {
				selmon = mons;
			}
			cleanupmon(m);
		}
		free(unique);
	} else
#endif /* XINERAMA */
	{ /* default monitor setup */
		if (!mons) {
			mons = createmon();
		}
		if (mons->mw != sw || mons->mh != sh) {
			dirty = 1;
			mons->mw = mons->ww = sw;
			mons->mh = mons->wh = sh;
			updatebarpos(mons);
		}
	}
	if (dirty) {
		selmon = mons;
		selmon = wintomon(root);
	}
	return dirty;
}

void
updatenumlockmask(void)
{
	unsigned int i, j;
	XModifierKeymap *modmap;

	numlockmask = 0;
	modmap = XGetModifierMapping(dpy);
	for (i = 0; i < 8; i++)
		for (j = 0; j < modmap->max_keypermod; j++)
			if (modmap->modifiermap[i * modmap->max_keypermod + j]
			                == XKeysymToKeycode(dpy, XK_Num_Lock)) {
				numlockmask = (1 << i);
			}
	XFreeModifiermap(modmap);
}

void
updatesizehints(Client *c)
{
	long msize;
	XSizeHints size;

	if (!XGetWMNormalHints(dpy, c->win, &size, &msize))
		/* size is uninitialized, ensure that size.flags aren't used */
	{
		size.flags = PSize;
	}
	if (size.flags & PBaseSize) {
		c->basew = size.base_width;
		c->baseh = size.base_height;
	} else if (size.flags & PMinSize) {
		c->basew = size.min_width;
		c->baseh = size.min_height;
	} else {
		c->basew = c->baseh = 0;
	}
	if (size.flags & PResizeInc) {
		c->incw = size.width_inc;
		c->inch = size.height_inc;
	} else {
		c->incw = c->inch = 0;
	}
	if (size.flags & PMaxSize) {
		c->maxw = size.max_width;
		c->maxh = size.max_height;
	} else {
		c->maxw = c->maxh = 0;
	}
	if (size.flags & PMinSize) {
		c->minw = size.min_width;
		c->minh = size.min_height;
	} else if (size.flags & PBaseSize) {
		c->minw = size.base_width;
		c->minh = size.base_height;
	} else {
		c->minw = c->minh = 0;
	}
	if (size.flags & PAspect) {
		c->mina = (float)size.min_aspect.y / size.min_aspect.x;
		c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
	} else {
		c->maxa = c->mina = 0.0;
	}
	c->isfixed = (c->maxw && c->maxh && c->maxw == c->minw && c->maxh == c->minh);
	c->hintsvalid = 1;
}

void
updatestatus(void)
{
	if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext))) {
		strcpy(stext, "dwm-"VERSION);
	}
	drawbar(selmon);
}

void
updatesystray(int updatebar)
{
	XSetWindowAttributes wa;
	XWindowChanges wc;
	Client *i;
	Monitor *m = systraytomon(NULL);
	unsigned int x = m->mx + m->mw;
	unsigned int w = 1, xpad = 0, ypad = 0;
#if BARPADDING_PATCH
	xpad = sp;
	ypad = vp;
#endif // BARPADDING_PATCH

	if (!showsystray) {
		return;
	}
	if (!systray) {
		/* init systray */
		if (!(systray = (Systray *)calloc(1, sizeof(Systray)))) {
			die("fatal: could not malloc() %u bytes\n", sizeof(Systray));
		}

		wa.override_redirect = True;
		wa.event_mask = ButtonPressMask | ExposureMask;
		wa.background_pixel = 0;
		wa.border_pixel = 0;
		wa.colormap = cmap;
		systray->win = XCreateWindow(dpy, root, x - xpad, m->by + ypad, w, bh, 0, depth,
		                             InputOutput, visual,
		                             CWOverrideRedirect | CWBorderPixel | CWBackPixel | CWColormap | CWEventMask, &wa);
		XSelectInput(dpy, systray->win, SubstructureNotifyMask);
		XChangeProperty(dpy, systray->win, netatom[NetSystemTrayOrientation], XA_CARDINAL, 32,
		                PropModeReplace, (unsigned char *)&systrayorientation, 1);
		XChangeProperty(dpy, systray->win, netatom[NetSystemTrayVisual], XA_VISUALID, 32,
		                PropModeReplace, (unsigned char *)&visual->visualid, 1);
		XChangeProperty(dpy, systray->win, netatom[NetWMWindowType], XA_ATOM, 32,
		                PropModeReplace, (unsigned char *)&netatom[NetWMWindowTypeDock], 1);
		XMapRaised(dpy, systray->win);
		XSetSelectionOwner(dpy, netatom[NetSystemTray], systray->win, CurrentTime);
		if (XGetSelectionOwner(dpy, netatom[NetSystemTray]) == systray->win) {
			sendevent(root, xatom[Manager], StructureNotifyMask, CurrentTime, netatom[NetSystemTray], systray->win, 0, 0);
			XSync(dpy, False);
		} else {
			fprintf(stderr, "dwm: unable to obtain system tray.\n");
			free(systray);
			systray = NULL;
			return;
		}
	}

	for (w = 0, i = systray->icons; i; i = i->next) {
		wa.background_pixel = 0;
		XChangeWindowAttributes(dpy, i->win, CWBackPixel, &wa);
		XMapRaised(dpy, i->win);
		w += systrayspacing;
		i->x = w;
		XMoveResizeWindow(dpy, i->win, i->x, 0, i->w, i->h);
		w += i->w;
		if (i->mon != m) {
			i->mon = m;
		}
	}
	w = w ? w + systrayspacing : 1;
	x -= w;
	XMoveResizeWindow(dpy, systray->win, x - xpad, m->by + ypad, w, bh);
	wc.x = x - xpad;
	wc.y = m->by + ypad;
	wc.width = w;
	wc.height = bh;
	wc.stack_mode = Above;
	wc.sibling = m->barwin;
	XConfigureWindow(dpy, systray->win, CWX | CWY | CWWidth | CWHeight | CWSibling | CWStackMode, &wc);
	XMapWindow(dpy, systray->win);
	XMapSubwindows(dpy, systray->win);
	XSync(dpy, False);

	if (updatebar) {
		drawbar(m);
	}
}

void
updatesystrayicongeom(Client *i, int w, int h)
{
	if (i) {
		i->h = bh;
		if (w == h) {
			i->w = bh;
		} else if (h == bh) {
			i->w = w;
		} else {
			i->w = (int) ((float)bh * ((float)w / (float)h));
		}
		applysizehints(i, &(i->x), &(i->y), &(i->w), &(i->h), False);
		/* force icons into the systray dimensions if they don't want to */
		if (i->h > bh) {
			if (i->w == i->h) {
				i->w = bh;
			} else {
				i->w = (int) ((float)bh * ((float)i->w / (float)i->h));
			}
			i->h = bh;
		}
		if (i->w > 2 * bh) {
			i->w = bh;
		}
	}
}

void
updatesystrayiconstate(Client *i, XPropertyEvent *ev)
{
	long flags;
	int code = 0;

	if (!showsystray || !i || ev->atom != xatom[XembedInfo] ||
	                !(flags = getatomprop(i, xatom[XembedInfo]))) {
		return;
	}

	if (flags & XEMBED_MAPPED && !i->tags) {
		i->tags = 1;
		code = XEMBED_WINDOW_ACTIVATE;
		XMapRaised(dpy, i->win);
		setclientstate(i, NormalState);
	} else if (!(flags & XEMBED_MAPPED) && i->tags) {
		i->tags = 0;
		code = XEMBED_WINDOW_DEACTIVATE;
		XUnmapWindow(dpy, i->win);
		setclientstate(i, WithdrawnState);
	} else {
		return;
	}
	sendevent(i->win, xatom[Xembed], StructureNotifyMask, CurrentTime, code, 0,
	          systray->win, XEMBED_EMBEDDED_VERSION);
}

void
updatetitle(Client *c)
{
	if (!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name)) {
		gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
	}
	if (c->name[0] == '\0') { /* hack to mark broken clients */
		strcpy(c->name, broken);
	}
}

void
updateicon(Client *c)
{
	freeicon(c);
	c->icon = geticonprop(c->win, &c->icw, &c->ich);
}

void
updatewindowtype(Client *c)
{
	Atom state = getatomprop(c, netatom[NetWMState]);
	Atom wtype = getatomprop(c, netatom[NetWMWindowType]);

	if (state == netatom[NetWMFullscreen]) {
		setfullscreen(c, 1);
	}
	if (wtype == netatom[NetWMWindowTypeDialog]) {
		c->iscentered = 1;
		c->isfloating = 1;
	}
}

void
updatewmhints(Client *c)
{
	XWMHints *wmh;

	if ((wmh = XGetWMHints(dpy, c->win))) {
		if (c == selmon->sel && wmh->flags & XUrgencyHint) {
			wmh->flags &= ~XUrgencyHint;
			XSetWMHints(dpy, c->win, wmh);
		} else {
			c->isurgent = (wmh->flags & XUrgencyHint) ? 1 : 0;
		}
		if (wmh->flags & InputHint) {
			c->neverfocus = !wmh->input;
		} else {
			c->neverfocus = 0;
		}
		XFree(wmh);
	}
}

void
view(const Arg *arg)
{
	int i;
	unsigned int tmptag;

	if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags]) {
		return;
	}
	selmon->seltags ^= 1; /* toggle sel tagset */
	if (arg->ui & TAGMASK) {
		selmon->pertag->prevtag = selmon->pertag->curtag;
		selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
		if (arg->ui == ~0) {
			selmon->pertag->curtag = 0;
		} else {
			for (i = 0; !(arg->ui & 1 << i); i++) ;
			selmon->pertag->curtag = i + 1;
		}
	} else {
		tmptag = selmon->pertag->prevtag;
		selmon->pertag->prevtag = selmon->pertag->curtag;
		selmon->pertag->curtag = tmptag;
	}
	selmon->nmaster = selmon->pertag->nmasters[selmon->pertag->curtag];
	selmon->mfact = selmon->pertag->mfacts[selmon->pertag->curtag];
	selmon->sellt = selmon->pertag->sellts[selmon->pertag->curtag];
	selmon->lt[selmon->sellt] = selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt];
	selmon->lt[selmon->sellt ^ 1] = selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt ^ 1];
	if (selmon->showbar != selmon->pertag->showbars[selmon->pertag->curtag]) {
		togglebar(NULL);
	}
	focus(NULL);
	arrange(selmon);
}

pid_t
winpid(Window w)
{

	pid_t result = 0;

#ifdef __linux__
	xcb_res_client_id_spec_t spec = {0};
	spec.client = w;
	spec.mask = XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID;

	xcb_generic_error_t *e = NULL;
	xcb_res_query_client_ids_cookie_t c = xcb_res_query_client_ids(xcon, 1, &spec);
	xcb_res_query_client_ids_reply_t *r = xcb_res_query_client_ids_reply(xcon, c, &e);

	if (!r) {
		return (pid_t)0;
	}

	xcb_res_client_id_value_iterator_t i = xcb_res_query_client_ids_ids_iterator(r);
	for (; i.rem; xcb_res_client_id_value_next(&i)) {
		spec = i.data->spec;
		if (spec.mask & XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID) {
			uint32_t *t = xcb_res_client_id_value_value(i.data);
			result = *t;
			break;
		}
	}

	free(r);

	if (result == (pid_t) -1) {
		result = 0;
	}

#endif /* __linux__ */

#ifdef __OpenBSD__
	Atom type;
	int format;
	unsigned long len, bytes;
	unsigned char *prop;
	pid_t ret;

	if (XGetWindowProperty(dpy, w, XInternAtom(dpy, "_NET_WM_PID", 0), 0, 1, False, AnyPropertyType, &type, &format, &len, &bytes, &prop) != Success || !prop) {
		return 0;
	}

	ret = *(pid_t*)prop;
	XFree(prop);
	result = ret;

#endif /* __OpenBSD__ */
	return result;
}

pid_t
getparentprocess(pid_t p)
{
	unsigned int v = 0;

#ifdef __linux__
	FILE *f;
	char buf[256];
	snprintf(buf, sizeof(buf) - 1, "/proc/%u/stat", (unsigned)p);

	if (!(f = fopen(buf, "r"))) {
		return 0;
	}

	fscanf(f, "%*u %*s %*c %u", &v);
	fclose(f);
#endif /* __linux__*/

#ifdef __OpenBSD__
	int n;
	kvm_t *kd;
	struct kinfo_proc *kp;

	kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, NULL);
	if (!kd) {
		return 0;
	}

	kp = kvm_getprocs(kd, KERN_PROC_PID, p, sizeof(*kp), &n);
	v = kp->p_ppid;
#endif /* __OpenBSD__ */

	return (pid_t)v;
}

int
isdescprocess(pid_t p, pid_t c)
{
	while (p != c && c != 0) {
		c = getparentprocess(c);
	}

	return (int)c;
}

Client *
termforwin(const Client *w)
{
	Client *c;
	Monitor *m;

	if (!w->pid || w->isterminal) {
		return NULL;
	}

	for (m = mons; m; m = m->next) {
		for (c = m->clients; c; c = c->next) {
			if (c->isterminal && !c->swallowing && c->pid && isdescprocess(c->pid, w->pid)) {
				return c;
			}
		}
	}

	return NULL;
}

Client *
swallowingclient(Window w)
{
	Client *c;
	Monitor *m;

	for (m = mons; m; m = m->next) {
		for (c = m->clients; c; c = c->next) {
			if (c->swallowing && c->swallowing->win == w) {
				return c;
			}
		}
	}

	return NULL;
}

Client *
wintoclient(Window w)
{
	Client *c;
	Monitor *m;

	for (m = mons; m; m = m->next)
		for (c = m->clients; c; c = c->next)
			if (c->win == w) {
				return c;
			}
	return NULL;
}

Monitor *
wintomon(Window w)
{
	int x, y;
	Client *c;
	Monitor *m;

	if (w == root && getrootptr(&x, &y)) {
		return recttomon(x, y, 1, 1);
	}
	for (m = mons; m; m = m->next)
		if (w == m->barwin) {
			return m;
		}
	if ((c = wintoclient(w))) {
		return c->mon;
	}
	return selmon;
}

Client *
wintosystrayicon(Window w)
{
	Client *i = NULL;

	if (!showsystray || !w) {
		return i;
	}
	for (i = systray->icons; i && i->win != w; i = i->next);
	return i;
}

/* There's no way to check accesses to destroyed windows, thus those cases are
 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
 * default error handler, which may call exit. */
int
xerror(Display *dpy, XErrorEvent *ee)
{
	if (ee->error_code == BadWindow
	                || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
	                || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
	                || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
	                || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
	                || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
	                || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
	                || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
	                || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable)) {
		return 0;
	}
	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
	        ee->request_code, ee->error_code);
	return xerrorxlib(dpy, ee); /* may call exit */
}

int
xerrordummy(Display *dpy, XErrorEvent *ee)
{
	return 0;
}

/* Startup Error handler to check if another window manager
 * is already running. */
int
xerrorstart(Display *dpy, XErrorEvent *ee)
{
	die("dwm: another window manager is already running");
	return -1;
}

void
xinitvisual()
{
	XVisualInfo *infos;
	XRenderPictFormat *fmt;
	int nitems;
	int i;

	XVisualInfo tpl = {
		.screen = screen,
		.depth = 32,
		.class = TrueColor
	};
	long masks = VisualScreenMask | VisualDepthMask | VisualClassMask;

	infos = XGetVisualInfo(dpy, masks, &tpl, &nitems);
	visual = NULL;
	for (i = 0; i < nitems; i ++) {
		fmt = XRenderFindVisualFormat(dpy, infos[i].visual);
		if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
			visual = infos[i].visual;
			depth = infos[i].depth;
			cmap = XCreateColormap(dpy, root, visual, AllocNone);
			useargb = 1;
			break;
		}
	}

	XFree(infos);

	if (! visual) {
		visual = DefaultVisual(dpy, screen);
		depth = DefaultDepth(dpy, screen);
		cmap = DefaultColormap(dpy, screen);
	}
}

void
xrdb(const Arg *arg)
{
	loadxrdb();
	int i;
	for (i = 0; i < LENGTH(colors); i++) {
		scheme[i] = drw_scm_create(drw, colors[i], alphas[i], 3);
	}
	focus(NULL);
	arrange(NULL);
}

void
zoom(const Arg *arg)
{
	Client *c = selmon->sel;

	if (!selmon->lt[selmon->sellt]->arrange || !c || c->isfloating) {
		return;
	}
	if (c == nexttiled(selmon->clients) && !(c = nexttiled(c->next))) {
		return;
	}
	pop(c);
}

void
killunsel(const Arg *arg)
{
	Client *i = NULL;

	if (!selmon->sel) {
		return;
	}

	for (i = selmon->clients; i; i = i->next) {
		if (ISVISIBLE(i) && i != selmon->sel) {
			if (!sendevent(
			                        i->win,
			                        wmatom[WMDelete],
			                        NoEventMask,
			                        wmatom[WMDelete],
			                        CurrentTime,
			                        0, 0, 0
			                )) {
				XGrabServer(dpy);
				XSetErrorHandler(xerrordummy);
				XSetCloseDownMode(dpy, DestroyAll);
				XKillClient(dpy, i->win);
				XSync(dpy, False);
				XSetErrorHandler(xerror);
				XUngrabServer(dpy);
			}
		}
	}
}

int
main(int argc, char *argv[])
{
	if (argc == 2 && !strcmp("-v", argv[1])) {
		die("dwm-%f",VERSION);
	} else if (argc != 1) {
		die("usage: dwm [-v]");
	}
	if (!setlocale(LC_CTYPE, "") || !XSupportsLocale()) {
		fputs("warning: no locale support\n", stderr);
	}
	if (!(dpy = XOpenDisplay(NULL))) {
		die("dwm: cannot open display");
	}
	if (!(xcon = XGetXCBConnection(dpy))) {
		die("dwm: cannot get xcb connection\n");
	}
	checkotherwm();
	XrmInitialize();
	loadxrdb();
	setup();
#ifdef __OpenBSD__
	if (pledge("stdio rpath proc exec ps", NULL) == -1) {
		die("pledge");
	}
#endif /* __OpenBSD__ */
	scan();
	run();
	if(restart) execvp(argv[0], argv);
	cleanup();
	XCloseDisplay(dpy);
	return EXIT_SUCCESS;
}

void
insertclient(Client *item, Client *insertItem, int after)
{
	Client *c;
	if (item == NULL || insertItem == NULL || item == insertItem) {
		return;
	}
	detach(insertItem);
	if (!after && selmon->clients == item) {
		attach(insertItem);
		return;
	}
	if (after) {
		c = item;
	} else {
		for (c = selmon->clients; c; c = c->next) {
			if (c->next == item) {
				break;
			}
		}
	}
	insertItem->next = c->next;
	c->next = insertItem;
}

void
inplacerotate(const Arg *arg)
{
	if (!selmon->sel || (selmon->sel->isfloating && !arg->f)) {
		return;
	}

	unsigned int selidx = 0, i = 0;
	Client *c = NULL, *stail = NULL, *mhead = NULL, *mtail = NULL, *shead = NULL;

	// Determine positionings for insertclient
	for (c = selmon->clients; c; c = c->next) {
		if (ISVISIBLE(c) && !(c->isfloating)) {
			if (selmon->sel == c) {
				selidx = i;
			}
			if (i == selmon->nmaster - 1) {
				mtail = c;
			}
			if (i == selmon->nmaster) {
				shead = c;
			}
			if (mhead == NULL) {
				mhead = c;
			}
			stail = c;
			i++;
		}
	}

	// All clients rotate
	if (arg->i == 2) {
		insertclient(selmon->clients, stail, 0);
	}
	if (arg->i == -2) {
		insertclient(stail, selmon->clients, 1);
	}
	// Stack xor master rotate
	if (arg->i == -1 && selidx >= selmon->nmaster) {
		insertclient(stail, shead, 1);
	}
	if (arg->i == 1 && selidx >= selmon->nmaster) {
		insertclient(shead, stail, 0);
	}
	if (arg->i == -1 && selidx < selmon->nmaster) {
		insertclient(mtail, mhead, 1);
	}
	if (arg->i == 1 && selidx < selmon->nmaster) {
		insertclient(mhead, mtail, 0);
	}

	// Restore focus position
	i = 0;
	for (c = selmon->clients; c; c = c->next) {
		if (!ISVISIBLE(c) || (c->isfloating)) {
			continue;
		}
		if (i == selidx) {
			focus(c);
			break;
		}
		i++;
	}
	arrange(selmon);
	focus(c);
}

/* See LICENSE file for copyright and license details.
 *
 * dynamic window manager is designed like any other X client as well. It is
 * driven through handling X events. In contrast to other X clients, a window
 * manager selects for SubstructureRedirectMask on the root window, to receive
 * events about window (dis-)appearance. Only one X connection at a time is
 * allowed to select for this event mask.
 *
 * The event handlers of dwm are organized in an array which is accessed
 * whenever a new event has been fetched. This allows event dispatching
 * in O(1) time.
 *
 * Each child of the root window is called a client, except windows which have
 * set the override_redirect flag. Clients are organized in a linked client
 * list on each monitor, the focus history is remembered through a stack list
 * on each monitor. Each client contains a bit array to indicate the tags of a
 * client.
 *
 * Keys and tagging rules are organized as arrays and defined in config.h.
 *
 * To understand everything else, start reading main().
 */