dwm/dwm.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().
 */
#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 <sys/types.h>
#include <sys/wait.h>
#include <X11/cursorfont.h>
#include <X11/keysym.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 "drw.h"
#include "util.h"

/* macros */
#define BARRULES                20
#define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
#define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
#define GETINC(X)               ((X) - 2000)
#define INC(X)                  ((X) + 2000)
#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 INTERSECTC(x,y,w,h,z)   (MAX(0, MIN((x)+(w),(z)->x+(z)->w) - MAX((x),(z)->x)) \
                               * MAX(0, MIN((y)+(h),(z)->y+(z)->h) - MAX((y),(z)->y)))
#define ISVISIBLE(C, M)         ((C->tags & M->tagset[M->seltags]))
#define ISINC(X)                ((X) > 1000 && (X) < 3000)
#define PREVSEL                 3000
#define LENGTH(X)               (sizeof X / sizeof X[0])
#define MOD(N,M)                ((N)%(M) < 0 ? (N)%(M) + (M) : (N)%(M))
#define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
#define WIDTH(X)                ((X)->w + 2 * (X)->bw)
#define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
#define NUMTAGS					(LENGTH(tags) + LENGTH(scratchpads))
#define TAGMASK     			((1 << NUMTAGS) - 1)
#define SPTAG(i) 				((1 << LENGTH(tags)) << (i))
#define SPTAGMASK   			(((1 << LENGTH(scratchpads))-1) << LENGTH(tags))
#define TAGSLENGTH              (LENGTH(tags))
#define TEXTW(X)                (drw_fontset_getwidth(drw, (X)) + lrpad)
#define TRUNC(X,A,B)            (MAX((A), MIN((X), (B))))
#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 MWM_HINTS_FLAGS_FIELD       0
#define MWM_HINTS_DECORATIONS_FIELD 2
#define MWM_HINTS_DECORATIONS       (1 << 1)
#define MWM_DECOR_ALL               (1 << 0)
#define MWM_DECOR_BORDER            (1 << 1)
#define MWM_DECOR_TITLE             (1 << 3)

/* enums */
enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
enum { SchemeNorm, SchemeSel }; /* color schemes */
enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
       NetWMFullscreen, NetActiveWindow, NetWMWindowType,
       NetSystemTray, NetSystemTrayOP, NetSystemTrayOrientation,
       NetSystemTrayVisual, NetWMWindowTypeDock, NetSystemTrayOrientationHorz,
       NetDesktopNames, NetDesktopViewport, NetNumberOfDesktops, NetCurrentDesktop,
       NetClientListStacking,
       NetClientList, NetLast }; /* EWMH atoms */
enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
       ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
enum {
	BAR_ALIGN_LEFT,
	BAR_ALIGN_CENTER,
	BAR_ALIGN_RIGHT,
	BAR_ALIGN_LEFT_LEFT,
	BAR_ALIGN_LEFT_RIGHT,
	BAR_ALIGN_LEFT_CENTER,
	BAR_ALIGN_NONE,
	BAR_ALIGN_RIGHT_LEFT,
	BAR_ALIGN_RIGHT_RIGHT,
	BAR_ALIGN_RIGHT_CENTER,
	BAR_ALIGN_LAST
}; /* bar alignment */

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

typedef struct Monitor Monitor;
typedef struct Bar Bar;
struct Bar {
	Window win;
	Monitor *mon;
	Bar *next;
	int idx;
	int topbar;
	int bx, by, bw, bh; /* bar geometry */
	int w[BARRULES]; // module width
	int x[BARRULES]; // module position
};

typedef struct {
	int max_width;
} BarWidthArg;

typedef struct {
	int x;
	int w;
} BarDrawArg;

typedef struct {
	int rel_x;
	int rel_y;
	int rel_w;
	int rel_h;
} BarClickArg;

typedef struct {
	int monitor;
	int bar;
	int alignment; // see bar alignment enum
	int (*widthfunc)(Bar *bar, BarWidthArg *a);
	int (*drawfunc)(Bar *bar, BarDrawArg *a);
	int (*clickfunc)(Bar *bar, Arg *arg, BarClickArg *a);
	char *name; // for debugging
	int x, w; // position, width for internal use
} BarRule;

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

typedef struct Clientlist Clientlist;
typedef struct Client Client;
struct Client {
	char name[256];
	float mina, maxa;
	int x, y, w, h;
	int oldx, oldy, oldw, oldh;
	int basew, baseh, incw, inch, maxw, maxh, minw, minh;
	int bw, oldbw;
	unsigned int tags;
	int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
	int ignoresizehints;
	int beingmoved;
	Client *next;
	Client *snext;
	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;

struct Monitor {
	char ltsymbol[16];
	float mfact;
	int nmaster;
	int num;
	int mx, my, mw, mh;   /* screen size */
	int wx, wy, ww, wh;   /* window area  */
	unsigned int seltags;
	unsigned int sellt;
	unsigned int tagset[2];
	int showbar;
	Clientlist *cl;
	Client *sel;
	Monitor *next;
	Bar *bar;
	const Layout *lt[2];
};

typedef struct {
	const char *class;
	const char *instance;
	const char *title;
	const char *type;
	unsigned int tags;
	int isfloating;
	const char *floatpos;
	int monitor;
	int matchonce;
} Rule;

struct Clientlist {
	Client *clients;
	Client *stack;
};

/* 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 attachclients(Monitor *m);
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 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 void drawbarwin(Bar *bar);
static void enternotify(XEvent *e);
static void expose(XEvent *e);
static void floatpos(const Arg *arg);
static void focus(Client *c);
static void focusin(XEvent *e);
static void focusmon(const Arg *arg);
static void focusstack(const Arg *arg);
static void getfloatpos(int pos, char pCh, int size, char sCh, int min_p, int max_s, int cp, int cs, int cbw, int defgrid, int *out_p, int *out_s);
static Atom getatomprop(Client *c, Atom prop);
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 void grabbuttons(Client *c, int focused);
static void grabkeys(void);
static void incnmaster(const Arg *arg);
static void keypress(XEvent *e);
static void killclient(const Arg *arg);
static void losefullscreen(Client *sel, 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 movemouse(const Arg *arg);
static Client *nexttiled(Client *c, Monitor *m);
static void moveorplace(const Arg *arg);
static void placemouse(const Arg *arg);
static void pop(Client *);
static void propertynotify(XEvent *e);
static void pushstack(const Arg *arg);
static void quit(const Arg *arg);
static Client *recttoclient(int x, int y, int w, int h);
static Monitor *recttomon(int x, int y, int w, int h);
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 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 setfloatpos(Client *c, const char *floatpos);
static void setcurrentdesktop(void);
static void setdesktopnames(void);
static void setfocus(Client *c);
static void setfullscreen(Client *c, int fullscreen);
static void setlayout(const Arg *arg);
static void setmfact(const Arg *arg);
static void setnumdesktops(void);
static void setup(void);
static void setviewport(void);
static void seturgent(Client *c, int urg);
static void showhide(Client *c);
static void sigchld(int unused);
static void spawn(const Arg *arg);
static int stackpos(const Arg *arg);
static void tag(const Arg *arg);
static void tagmon(const Arg *arg);
static void tile(Monitor *);
static void togglebar(const Arg *arg);
static void togglefloating(const Arg *arg);
static void togglefullscreen(const Arg *arg);
static void togglescratch(const Arg *arg);
static void toggletag(const Arg *arg);
static void toggleview(const Arg *arg);
static void unfocus(Client *c, int setfocus);
static void unmanage(Client *c, int destroyed);
static void unmapnotify(XEvent *e);
static void updatecurrentdesktop(void);
static void updatebarpos(Monitor *m);
static void updatebars(void);
static void updateclientlist(void);
static int updategeom(void);
static void updatemotifhints(Client *c);
static void updatenumlockmask(void);
static void updatesizehints(Client *c);
static void updatestatus(void);
static void updatetitle(Client *c);
static void updatewindowtype(Client *c);
static void updatewmhints(Client *c);
static void focusorview(const Arg *arg);
static void view(const Arg *arg);
static void warp(const Client *c);
static Client *wintoclient(Window w);
static Monitor *wintomon(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 zoom(const Arg *arg);

#include "patch/include.h"
/* variables */
static const char broken[] = "broken";
static char stext[1024];
static char rawstext[1024];
static char estext[1024];
static char rawestext[1024];
static int screen;
static int sw, sh;           /* X display screen geometry width, height */
static int bh;               /* bar geometry */
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], motifatom, xatom[XLast];
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 Clientlist *cl;

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

#include "patch/include.c"

/* 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 };
	Atom wtype;

	/* rule matching */
	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;
	wtype = getatomprop(c, netatom[NetWMWindowType]);

	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))
		&& (!r->type || wtype == XInternAtom(dpy, r->type, False)))
		{
			c->isfloating = r->isfloating;
			c->tags |= r->tags;
			for (m = mons; m && (m->tagset[m->seltags] & c->tags) == 0; m = m->next);
			if ((r->tags & SPTAGMASK) && r->isfloating) {
				c->x = c->mon->wx + (c->mon->ww / 2 - WIDTH(c) / 2);
				c->y = c->mon->wy + (c->mon->wh / 2 - HEIGHT(c) / 2);
			}

			for (m = mons; m && m->num != r->monitor; m = m->next);
			if (m)
				c->mon = m;
			if (c->isfloating && r->floatpos)
				setfloatpos(c, r->floatpos);
			if (r->matchonce)
				break;
		}
	}
	if (ch.res_class)
		XFree(ch.res_class);
	if (ch.res_name)
		XFree(ch.res_name);
	if(c->tags & TAGMASK)                    c->tags = c->tags & TAGMASK;
	else if(c->mon->tagset[c->mon->seltags]) c->tags = c->mon->tagset[c->mon->seltags] & ~SPTAGMASK;
	else                                     c->tags = 1;
}

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 (!c->ignoresizehints && (resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange)) {
		/* 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->cl->stack);
	else for (m = mons; m; m = m->next)
		showhide(m->cl->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->cl->clients;
	c->mon->cl->clients = c;
}

void
attachclients(Monitor *m) {
	/* attach clients to the specified monitor */
	Monitor *tm;
	Client *c;
	unsigned int utags = 0;
	Bool rmons = False;
	if(!m)
		return;

	/* collect information about the tags in use */
	for (tm = mons; tm; tm = tm->next)
		if(tm != m)
			utags |= tm->tagset[tm->seltags];

	for (c = m->cl->clients; c; c = c->next)
		if(ISVISIBLE(c, m)) {
			/* if client is also visible on other tags that are displayed on
			 * other monitors, remove these tags */
			if(c->tags & utags) {
				c->tags = c->tags & m->tagset[m->seltags];
				rmons = True;
			}
			unfocus(c, True);
			c->mon = m;
		}

	if (rmons)
		for (tm = mons; tm; tm = tm->next)
			if(tm != m)
				arrange(tm);

}

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

void
buttonpress(XEvent *e)
{
	int click, i, r, mi;
	Arg arg = {0};
	Client *c;
	Monitor *m;
	Bar *bar;
	XButtonPressedEvent *ev = &e->xbutton;
	const BarRule *br;
	BarClickArg carg = { 0, 0, 0, 0 };

	click = ClkRootWin;
	/* focus monitor if necessary */
	if ((m = wintomon(ev->window)) && m != selmon
	) {
		unfocus(selmon->sel, 1);
		selmon = m;
		focus(NULL);
	}

	for (mi = 0, m = mons; m && m != selmon; m = m->next, mi++); // get the monitor index
	for (bar = selmon->bar; bar; bar = bar->next) {
		if (ev->window == bar->win) {
			for (r = 0; r < LENGTH(barrules); r++) {
				br = &barrules[r];
				if (br->bar != bar->idx || (br->monitor == 'A' && m != selmon) || br->clickfunc == NULL)
					continue;
				if (br->monitor != 'A' && br->monitor != -1 && br->monitor != mi)
					continue;
				if (bar->x[r] <= ev->x && ev->x <= bar->x[r] + bar->w[r]) {
					carg.rel_x = ev->x - bar->x[r];
					carg.rel_y = ev->y;
					carg.rel_w = bar->w[r];
					carg.rel_h = bar->bh;
					click = br->clickfunc(bar, &arg, &carg);
					if (click < 0)
						return;
					break;
				}
			}
			break;
		}
	}

	if (click == ClkRootWin && (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->cl->stack)
			unmanage(m->cl->stack, 0);
	XUngrabKey(dpy, AnyKey, AnyModifier, root);
	while (mons)
		cleanupmon(mons);
	if (showsystray && systray) {
		while (systray->icons)
			removesystrayicon(systray->icons);
		if (systray->win) {
			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]);
	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;
	Bar *bar;

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

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

	if (showsystray && systray && 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);
			XClassHint ch = {"dwmsystray", "dwmsystray"};
			XSetClassHint(dpy, c->win, &ch);
			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);
		}
		return;
	}

	if (!c)
		return;
	if (cme->message_type == netatom[NetWMState]) {
		if (cme->data.l[1] == netatom[NetWMFullscreen]
		|| cme->data.l[2] == netatom[NetWMFullscreen])
			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]) {
		for (i = 0; i < LENGTH(tags) && !((1 << i) & c->tags); i++);
		if (i < LENGTH(tags)) {
			const Arg a = {.ui = 1 << i};
			view(&a);
			focus(c);
			restack(selmon);
		}
	}
}

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;
	Bar *bar;
	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->cl->clients; c; c = c->next)
					if (c->isfullscreen)
						resizeclient(c, m->mx, m->my, m->mw, m->mh);
				for (bar = m->bar; bar; bar = bar->next)
					XMoveResizeWindow(dpy, bar->win, bar->bx, bar->by, bar->bw, bar->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, m))
				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, *mon, *tm;
	int i, n, mi, max_bars = 2, istopbar = topbar;

	const BarRule *br;
	Bar *bar;

	/* bail out if the number of monitors exceeds the number of tags */
	for (i=1, tm=mons; tm; i++, tm=tm->next);
	if (i > LENGTH(tags)) {
		fprintf(stderr, "dwm: failed to add monitor, number of tags exceeded\n");
		return NULL;
	}
	/* find the first tag that isn't in use */
	for (i=0; i < LENGTH(tags); i++) {
		for (tm=mons; tm && !(tm->tagset[tm->seltags] & (1<<i)); tm=tm->next);
		if (!tm)
			break;
	}
	/* reassign all tags to monitors since there's currently no free tag for the
	 * new monitor */
	if (i >= LENGTH(tags))
		for (i=0, tm=mons; tm; tm=tm->next, i++) {
			tm->seltags ^= 1;
			tm->tagset[tm->seltags] = (1<<i) & TAGMASK;
		}
	m = ecalloc(1, sizeof(Monitor));
	m->cl = cl;
	m->tagset[0] = m->tagset[1] = (1<<i) & TAGMASK;
	m->mfact = mfact;
	m->nmaster = nmaster;
	m->showbar = showbar;

	for (mi = 0, mon = mons; mon; mon = mon->next, mi++); // monitor index
	m->lt[0] = &layouts[0];
	m->lt[1] = &layouts[1 % LENGTH(layouts)];
	strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);

	/* Derive the number of bars for this monitor based on bar rules */
	for (n = -1, i = 0; i < LENGTH(barrules); i++) {
		br = &barrules[i];
		if (br->monitor == 'A' || br->monitor == -1 || br->monitor == mi)
			n = MAX(br->bar, n);
	}

	for (i = 0; i <= n && i < max_bars; i++) {
		bar = ecalloc(1, sizeof(Bar));
		bar->mon = m;
		bar->idx = i;
		bar->next = m->bar;
		bar->topbar = istopbar;
		m->bar = bar;
		istopbar = !istopbar;
	}

	return m;
}

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

	if ((c = wintoclient(ev->window)))
		unmanage(c, 1);
	else if (showsystray && (c = wintosystrayicon(ev->window))) {
		removesystrayicon(c);
		drawbarwin(systray->bar);
	}
}

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("foreground", foreground);
        XRDB_LOAD_COLOR("background", background);
        XRDB_LOAD_COLOR("accent", accent);
        XRDB_LOAD_COLOR("secondary", secondary);
        XRDB_LOAD_COLOR("border",  border);
        XRDB_LOAD_COLOR("color0",  termcol0);
        XRDB_LOAD_COLOR("color1",  termcol1);
        XRDB_LOAD_COLOR("color2",  termcol2);
        XRDB_LOAD_COLOR("color3",  termcol3);
        XRDB_LOAD_COLOR("color4",  termcol4);
        XRDB_LOAD_COLOR("color5",  termcol5);
        XRDB_LOAD_COLOR("color6",  termcol6);
        XRDB_LOAD_COLOR("color7",  termcol7);
        XRDB_LOAD_COLOR("color8",  termcol8);
        XRDB_LOAD_COLOR("color9",  termcol9);
        XRDB_LOAD_COLOR("color10", termcol10);
        XRDB_LOAD_COLOR("color11", termcol11);
        XRDB_LOAD_COLOR("color12", termcol12);
        XRDB_LOAD_COLOR("color13", termcol13);
        XRDB_LOAD_COLOR("color14", termcol14);
        XRDB_LOAD_COLOR("color15", termcol15);
      }
    }
  }

  XCloseDisplay(display);
}

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

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

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

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

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

void
drawbar(Monitor *m)
{
	Bar *bar;
	for (bar = m->bar; bar; bar = bar->next)
		drawbarwin(bar);
}

void
drawbars(void)
{
	Monitor *m;
	for (m = mons; m; m = m->next)
		drawbar(m);
}

void
drawbarwin(Bar *bar)
{
	if (!bar->win)
		return;
	Monitor *mon;
	int r, w, mi;
	int rx, lx, rw, lw; // bar size, split between left and right if a center module is added
	const BarRule *br;
	BarWidthArg warg = { 0 };
	BarDrawArg darg  = { 0, 0 };

	for (mi = 0, mon = mons; mon && mon != bar->mon; mon = mon->next, mi++); // get the monitor index
	rw = lw = bar->bw;
	rx = lx = 0;

	drw_setscheme(drw, scheme[SchemeNorm]);
	drw_rect(drw, lx, 0, lw, bh, 1, 1);
	for (r = 0; r < LENGTH(barrules); r++) {
		br = &barrules[r];
		if (br->bar != bar->idx || br->drawfunc == NULL || (br->monitor == 'A' && bar->mon != selmon))
			continue;
		if (br->monitor != 'A' && br->monitor != -1 && br->monitor != mi)
			continue;
		drw_setscheme(drw, scheme[SchemeNorm]);
		warg.max_width = (br->alignment < BAR_ALIGN_RIGHT_LEFT ? lw : rw);
		w = br->widthfunc(bar, &warg);
		w = MIN(warg.max_width, w);

		if (lw <= 0) { // if left is exhausted then switch to right side, and vice versa
			lw = rw;
			lx = rx;
		} else if (rw <= 0) {
			rw = lw;
			rx = lx;
		}

		switch(br->alignment) {
		default:
		case BAR_ALIGN_NONE:
		case BAR_ALIGN_LEFT_LEFT:
		case BAR_ALIGN_LEFT:
			bar->x[r] = lx;
			if (lx == rx) {
				rx += w;
				rw -= w;
			}
			lx += w;
			lw -= w;
			break;
		case BAR_ALIGN_LEFT_RIGHT:
		case BAR_ALIGN_RIGHT:
			bar->x[r] = lx + lw - w;
			if (lx == rx)
				rw -= w;
			lw -= w;
			break;
		case BAR_ALIGN_LEFT_CENTER:
		case BAR_ALIGN_CENTER:
			bar->x[r] = lx + lw / 2 - w / 2;
			if (lx == rx) {
				rw = rx + rw - bar->x[r] - w;
				rx = bar->x[r] + w;
			}
			lw = bar->x[r] - lx;
			break;
		case BAR_ALIGN_RIGHT_LEFT:
			bar->x[r] = rx;
			if (lx == rx) {
				lx += w;
				lw -= w;
			}
			rx += w;
			rw -= w;
			break;
		case BAR_ALIGN_RIGHT_RIGHT:
			bar->x[r] = rx + rw - w;
			if (lx == rx)
				lw -= w;
			rw -= w;
			break;
		case BAR_ALIGN_RIGHT_CENTER:
			bar->x[r] = rx + rw / 2 - w / 2;
			if (lx == rx) {
				lw = lx + lw - bar->x[r] + w;
				lx = bar->x[r] + w;
			}
			rw = bar->x[r] - rx;
			break;
		}
		bar->w[r] = w;
		darg.x = bar->x[r];
		darg.w = bar->w[r];
		br->drawfunc(bar, &darg);
	}
	drw_map(drw, bar->win, 0, 0, bar->bw, bar->bh);
}

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);
}

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

	if (!c || (selmon->lt[selmon->sellt]->arrange && !c->isfloating))
		return;

	setfloatpos(c, (char *)arg->v);
	resizeclient(c, c->x, c->y, c->w, c->h);

	XRaiseWindow(dpy, c->win);
	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w/2, c->h/2);
}

void
focus(Client *c)
{
	if (c && c->mon != selmon)
		selmon = c->mon;

	if (!c || !ISVISIBLE(c, selmon))
		for (c = selmon->cl->stack; c && !ISVISIBLE(c, selmon); c = c->snext);
	if (selmon->sel && selmon->sel != 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);
	warp(selmon->sel);
}

void
focusstack(const Arg *arg)
{
	int i = stackpos(arg);
	Client *c, *p;

	if (i < 0 || !selmon->sel || (selmon->sel->isfullscreen && lockfullscreen))
		return;

	for(p = NULL, c = selmon->cl->clients; c && (i || !ISVISIBLE(c, selmon));
		i -= ISVISIBLE(c, selmon) ? 1 : 0, p = c, c = c->next);
	focus(c ? c : p);
	restack(selmon);
}

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

	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;
}

void
getfloatpos(int pos, char pCh, int size, char sCh, int min_p, int max_s, int cp, int cs, int cbw, int defgrid, int *out_p, int *out_s)
{
	int abs_p, abs_s, i, delta, rest;

	abs_p = pCh == 'A' || pCh == 'a';
	abs_s = sCh == 'A' || sCh == 'a';

	cs += 2*cbw;

	switch(pCh) {
	case 'A': // absolute position
		cp = pos;
		break;
	case 'a': // absolute relative position
		cp += pos;
		break;
	case 'y':
	case 'x': // client relative position
		cp = MIN(cp + pos, min_p + max_s);
		break;
	case 'Y':
	case 'X': // client position relative to monitor
		cp = min_p + MIN(pos, max_s);
		break;
	case 'S': // fixed client position (sticky)
	case 'C': // fixed client position (center)
	case 'Z': // fixed client right-hand position (position + size)
		if (pos == -1)
			break;
		pos = MAX(MIN(pos, max_s), 0);
		if (pCh == 'Z')
			cs = abs((cp + cs) - (min_p + pos));
		else if (pCh == 'C')
			cs = abs((cp + cs / 2) - (min_p + pos));
		else
			cs = abs(cp - (min_p + pos));
		cp = min_p + pos;
		sCh = 0; // size determined by position, override defined size
		break;
	case 'G': // grid
		if (pos <= 0)
			pos = defgrid; // default configurable
		if (size == 0 || pos < 2 || (sCh != 'p' && sCh != 'P'))
			break;
		delta = (max_s - cs) / (pos - 1);
		rest = max_s - cs - delta * (pos - 1);
		if (sCh == 'P') {
			if (size < 1 || size > pos)
				break;
			cp = min_p + delta * (size - 1);
		} else {
			for (i = 0; i < pos && cp >= min_p + delta * i + (i > pos - rest ? i + rest - pos + 1 : 0); i++);
			cp = min_p + delta * (MAX(MIN(i + size, pos), 1) - 1) + (i > pos - rest ? i + rest - pos + 1 : 0);
		}
		break;
	}

	switch(sCh) {
	case 'A': // absolute size
		cs = size;
		break;
	case 'a': // absolute relative size
		cs = MAX(1, cs + size);
		break;
	case '%': // client size percentage in relation to monitor window area size
		if (size <= 0)
			break;
		size = max_s * MIN(size, 100) / 100;
		/* falls through */
	case 'h':
	case 'w': // size relative to client
		if (sCh == 'w' || sCh == 'h') {
			if (size == 0)
				break;
			size += cs;
		}
		/* falls through */
	case 'H':
	case 'W': // normal size, position takes precedence
		if (pCh == 'S' && cp + size > min_p + max_s)
			size = min_p + max_s - cp;
		else if (size > max_s)
			size = max_s;

		if (pCh == 'C') { // fixed client center, expand or contract client
			delta = size - cs;
			if (delta < 0 || (cp - delta / 2 + size <= min_p + max_s))
				cp -= delta / 2;
			else if (cp - delta / 2 < min_p)
				cp = min_p;
			else if (delta)
				cp = min_p + max_s;
		} else if (pCh == 'Z')
			cp -= size - cs;

		cs = size;
		break;
	}

	if (pCh == '%') // client mid-point position in relation to monitor window area size
		cp = min_p + max_s * MAX(MIN(pos, 100), 0) / 100 - (cs) / 2;
	if (pCh == 'm' || pCh == 'M')
		cp = pos - cs / 2;

	if (!abs_p && cp < min_p)
		cp = min_p;
	if (cp + cs > min_p + max_s && !(abs_p && abs_s)) {
		if (abs_p || cp == min_p)
			cs = min_p + max_s - cp;
		else
			cp = min_p + max_s - cs;
	}

	*out_p = cp;
	*out_s = MAX(cs - 2*cbw, 1);
}

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;
}

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;
		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
		KeyCode code;

		XUngrabKey(dpy, AnyKey, AnyModifier, root);
		for (i = 0; i < LENGTH(keys); i++)
			if ((code = XKeysymToKeycode(dpy, keys[i].keysym)))
				for (j = 0; j < LENGTH(modifiers); j++)
					XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
						True, GrabModeAsync, GrabModeAsync);
	}
}

void
incnmaster(const Arg *arg)
{
	selmon->nmaster = 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 = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 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
losefullscreen(Client *sel, Client *next)
{
	if (!sel || !next)
		return;
	if (sel->isfullscreen && ISVISIBLE(sel, selmon) && sel->mon == next->mon && !next->isfloating)
		setfullscreen(sel, 0);
}

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

	c = ecalloc(1, sizeof(Client));
	c->win = 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->ignoresizehints = 0;

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

	if (c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
		c->x = c->mon->mx + c->mon->mw - WIDTH(c);
	if (c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
		c->y = c->mon->my + c->mon->mh - HEIGHT(c);
	c->x = MAX(c->x, c->mon->mx);
	/* only fix client y-offset, if the client center might cover the bar */
	c->y = MAX(c->y, ((c->mon->bar->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
		&& (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);

	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);
	updatemotifhints(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);
	XChangeProperty(dpy, root, netatom[NetClientListStacking], XA_WINDOW, 32, PropModePrepend,
		(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(selmon->sel, c);
		unfocus(selmon->sel, 0);
	}
	c->mon->sel = c;
	arrange(c->mon);
	XMapWindow(dpy, c->win);
	focus(NULL);
}

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

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

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

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

	if (!XGetWindowAttributes(dpy, ev->window, &wa))
		return;
	if (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->cl->clients; c; c = c->next)
		if (ISVISIBLE(c, m))
			n++;
	if (n > 0) /* override layout symbol */
		snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
	for (c = nexttiled(m->cl->clients, m); c; c = nexttiled(c->next, m))
		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
moveorplace(const Arg *arg) {
	if ((!selmon->lt[selmon->sellt]->arrange || (selmon->sel && selmon->sel->isfloating)))
		movemouse(arg);
	else
		placemouse(arg);
}

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) /* 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 / 60))
				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);
	}
}

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

void
placemouse(const Arg *arg)
{
	int x, y, px, py, ocx, ocy, nx = -9999, ny = -9999, freemove = 0;
	Client *c, *r = NULL, *at, *prevr;
	Monitor *m;
	XEvent ev;
	XWindowAttributes wa;
	Time lasttime = 0;
	int attachmode, prevattachmode;
	attachmode = prevattachmode = -1;

	if (!(c = selmon->sel) || !c->mon->lt[c->mon->sellt]->arrange) /* no support for placemouse when floating layout is used */
		return;
	if (c->isfullscreen) /* no support placing fullscreen windows by mouse */
		return;
	restack(selmon);
	prevr = c;
	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
		None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
		return;

	c->isfloating = 0;
	c->beingmoved = 1;

	XGetWindowAttributes(dpy, c->win, &wa);
	ocx = wa.x;
	ocy = wa.y;

	if (arg->i == 2) // warp cursor to client center
		XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, WIDTH(c) / 2, HEIGHT(c) / 2);

	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 / 60))
				continue;
			lasttime = ev.xmotion.time;

			nx = ocx + (ev.xmotion.x - x);
			ny = ocy + (ev.xmotion.y - y);

			if (!freemove && (abs(nx - ocx) > snap || abs(ny - ocy) > snap))
				freemove = 1;

			if (freemove)
				XMoveWindow(dpy, c->win, nx, ny);

			if ((m = recttomon(ev.xmotion.x, ev.xmotion.y, 1, 1)) && m != selmon)
				selmon = m;

			if (arg->i == 1) { // tiled position is relative to the client window center point
				px = nx + wa.width / 2;
				py = ny + wa.height / 2;
			} else { // tiled position is relative to the mouse cursor
				px = ev.xmotion.x;
				py = ev.xmotion.y;
			}

			r = recttoclient(px, py, 1, 1);

			if (!r || r == c)
				break;

			attachmode = 0; // below
			if (((float)(r->y + r->h - py) / r->h) > ((float)(r->x + r->w - px) / r->w)) {
				if (abs(r->y - py) < r->h / 2)
					attachmode = 1; // above
			} else if (abs(r->x - px) < r->w / 2)
				attachmode = 1; // above

			if ((r && r != prevr) || (attachmode != prevattachmode)) {
				detachstack(c);
				detach(c);
				if (c->mon != r->mon) {
					arrangemon(c->mon);
					c->tags = r->mon->tagset[r->mon->seltags];
				}

				c->mon = r->mon;
				r->mon->sel = r;

				if (attachmode) {
					if (r == r->mon->cl->clients)
						attach(c);
					else {
						for (at = r->mon->cl->clients; at->next != r; at = at->next);
						c->next = at->next;
						at->next = c;
					}
				} else {
					c->next = r->next;
					r->next = c;
				}

				attachstack(c);
				arrangemon(r->mon);
				prevr = r;
				prevattachmode = attachmode;
			}
			break;
		}
	} while (ev.type != ButtonRelease);
	XUngrabPointer(dpy, CurrentTime);

	if ((m = recttomon(ev.xmotion.x, ev.xmotion.y, 1, 1)) && m != c->mon) {
		detach(c);
		detachstack(c);
		arrangemon(c->mon);
		c->mon = m;
		c->tags = m->tagset[m->seltags];
		attach(c);
		attachstack(c);
		selmon = m;
	}

	focus(c);
	c->beingmoved = 0;

	if (nx != -9999)
		resize(c, nx, ny, c->w, c->h, 0);
	arrangemon(c->mon);
}

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);
		drawbarwin(systray->bar);
	}

	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:
			updatesizehints(c);
			break;
		case XA_WM_HINTS:
			updatewmhints(c);
			if (c->isurgent)
				drawbars();
			break;
		}
		if (ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
			updatetitle(c);
			if (c == c->mon->sel)
				drawbar(c->mon);
		}
		if (ev->atom == motifatom)
			updatemotifhints(c);
	}
}

void
pushstack(const Arg *arg) {
	int i = stackpos(arg);
	Client *sel = selmon->sel, *c, *p;

	if(i < 0)
		return;
	else if(i == 0) {
		detach(sel);
		attach(sel);
	}
	else {
		for(p = NULL, c = selmon->cl->clients; c; p = c, c = c->next)
			if(!(i -= (ISVISIBLE(c, selmon) && c != sel)))
				break;
		c = c ? c : p;
		detach(sel);
		sel->next = c->next;
		c->next = sel;
	}
	arrange(selmon);
}

void
quit(const Arg *arg)
{
	running = 0;
}

Client *
recttoclient(int x, int y, int w, int h)
{
	Client *c, *r = NULL;
	int a, area = 0;

	for (c = nexttiled(selmon->cl->clients, selmon); c; c = nexttiled(c->next, selmon)) {
		if ((a = INTERSECTC(x, y, w, h, c)) > area) {
			area = a;
			r = c;
		}
	}
	return r;
}

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
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;

	if (c->beingmoved)
		return;

	wc.border_width = c->bw;
	if (((nexttiled(c->mon->cl->clients, c->mon) == c && !nexttiled(c->next, c->mon))
		|| &monocle == c->mon->lt[c->mon->sellt]->arrange)
		&& !c->isfullscreen && !c->isfloating
		&& NULL != c->mon->lt[c->mon->sellt]->arrange) {
		c->w = wc.width += c->bw * 2;
		c->h = wc.height += c->bw * 2;
		wc.border_width = 0;
	}
	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) /* 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
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->bar->win;
		for (c = m->cl->stack; c; c = c->snext)
			if (!c->isfloating && ISVISIBLE(c, m)) {
				XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
				wc.sibling = c->win;
			}
	}
	XSync(dpy, False);
	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
	if (m == selmon && (m->tagset[m->seltags] & m->sel->tags))
		warp(m->sel);
}

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;
	int hadfocus = (c == selmon->sel);
	unfocus(c, 1);
	detach(c);
	detachstack(c);
	arrange(c->mon);
	c->mon = m;
	c->tags = (m->tagset[m->seltags] ? m->tagset[m->seltags] : 1);
	attach(c);
	attachstack(c);
	arrange(m);
	if (hadfocus) {
		focus(c);
		restack(m);
	} else
		focus(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);
}
void
setcurrentdesktop(void){
	long data[] = { 0 };
	XChangeProperty(dpy, root, netatom[NetCurrentDesktop], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 1);
}

void setdesktopnames(void){
	XTextProperty text;
	Xutf8TextListToTextProperty(dpy, (char **)tags, TAGSLENGTH, XUTF8StringStyle, &text);
	XSetTextProperty(dpy, root, &text, netatom[NetDesktopNames]);
}

int
sendevent(Window w, Atom proto, int mask, long d0, long d1, long d2, long d3, long d4)
{
	int n;
	Atom *protocols;
	Atom 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
setfloatpos(Client *c, const char *floatpos)
{
	char xCh, yCh, wCh, hCh;
	int x, y, w, h, wx, ww, wy, wh;

	if (!c || !floatpos)
		return;
	if (selmon->lt[selmon->sellt]->arrange && !c->isfloating)
		return;
	switch(sscanf(floatpos, "%d%c %d%c %d%c %d%c", &x, &xCh, &y, &yCh, &w, &wCh, &h, &hCh)) {
		case 4:
			if (xCh == 'w' || xCh == 'W') {
				w = x; wCh = xCh;
				h = y; hCh = yCh;
				x = -1; xCh = 'C';
				y = -1; yCh = 'C';
			} else if (xCh == 'p' || xCh == 'P') {
				w = x; wCh = xCh;
				h = y; hCh = yCh;
				x = 0; xCh = 'G';
				y = 0; yCh = 'G';
			} else if (xCh == 'm' || xCh == 'M') {
				getrootptr(&x, &y);
			} else {
				w = 0; wCh = 0;
				h = 0; hCh = 0;
			}
			break;
		case 8:
			if (xCh == 'm' || xCh == 'M')
				getrootptr(&x, &y);
			break;
		default:
			return;
	}

	wx = c->mon->wx;
	wy = c->mon->wy;
	ww = c->mon->ww;
	wh = c->mon->wh;
	c->ignoresizehints = 1;

	getfloatpos(x, xCh, w, wCh, wx, ww, c->x, c->w, c->bw, floatposgrid_x, &c->x, &c->w);
	getfloatpos(y, yCh, h, hCh, wy, wh, c->y, c->h, c->bw, floatposgrid_y, &c->y, &c->h);
}

void
setnumdesktops(void){
	long data[] = { TAGSLENGTH };
	XChangeProperty(dpy, root, netatom[NetNumberOfDesktops], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 1);
}

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)
{
	if (fullscreen && !c->isfullscreen) {
		XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
			PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
		c->isfullscreen = 1;
		c->oldstate = c->isfloating;
		c->oldbw = c->bw;
		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 (!fullscreen && c->isfullscreen){
		XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
			PropModeReplace, (unsigned char*)0, 0);
		c->isfullscreen = 0;
		c->isfloating = c->oldstate;
		c->bw = c->oldbw;
		c->x = c->oldx;
		c->y = c->oldy;
		c->w = c->oldw;
		c->h = c->oldh;
		resizeclient(c, c->x, c->y, c->w, c->h);
		arrange(c->mon);
	}
}

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

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

	/* clean up any zombies immediately */
	sigchld(0);

	/* init screen */
	screen = DefaultScreen(dpy);
	sw = DisplayWidth(dpy, screen);
	sh = DisplayHeight(dpy, screen);
	if(!(cl = (Clientlist *)calloc(1, sizeof(Clientlist))))
		die("fatal: could not malloc() %u bytes\n", sizeof(Clientlist));
	root = RootWindow(dpy, screen);
	drw = drw_create(dpy, screen, root, sw, sh);
	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[NetWMWindowTypeDock] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DOCK", False);
	xatom[Manager] = XInternAtom(dpy, "MANAGER", False);
	xatom[Xembed] = XInternAtom(dpy, "_XEMBED", False);
	xatom[XembedInfo] = XInternAtom(dpy, "_XEMBED_INFO", False);
	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", 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[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
	netatom[NetDesktopViewport] = XInternAtom(dpy, "_NET_DESKTOP_VIEWPORT", False);
	netatom[NetNumberOfDesktops] = XInternAtom(dpy, "_NET_NUMBER_OF_DESKTOPS", False);
	netatom[NetCurrentDesktop] = XInternAtom(dpy, "_NET_CURRENT_DESKTOP", False);
	netatom[NetDesktopNames] = XInternAtom(dpy, "_NET_DESKTOP_NAMES", False);
	motifatom = XInternAtom(dpy, "_MOTIF_WM_HINTS", False);
	netatom[NetClientListStacking] = XInternAtom(dpy, "_NET_CLIENT_LIST_STACKING", 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], 3);
	for (i = 0; i < LENGTH(colors); i++)
		scheme[i] = drw_scm_create(drw, colors[i], 3);
	/* 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);
	setnumdesktops();
	setcurrentdesktop();
	setdesktopnames();
	setviewport();
	XDeleteProperty(dpy, root, netatom[NetClientList]);
	XDeleteProperty(dpy, root, netatom[NetClientListStacking]);
	/* 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
setviewport(void){
	long data[] = { 0, 0 };
	XChangeProperty(dpy, root, netatom[NetDesktopViewport], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 2);
}


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, c->mon)) {
		if ((c->tags & SPTAGMASK) && c->isfloating) {
			c->x = c->mon->wx + (c->mon->ww / 2 - WIDTH(c) / 2);
			c->y = c->mon->wy + (c->mon->wh / 2 - HEIGHT(c) / 2);
		}
		/* 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
sigchld(int unused)
{
	if (signal(SIGCHLD, sigchld) == SIG_ERR)
		die("can't install SIGCHLD handler:");
	while (0 < waitpid(-1, NULL, WNOHANG));
}

void
spawn(const Arg *arg)
{
	if (fork() == 0) {
		if (dpy)
			close(ConnectionNumber(dpy));
		setsid();
		execvp(((char **)arg->v)[0], (char **)arg->v);
		fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
		perror(" failed");
		exit(EXIT_SUCCESS);
	}
}

int
stackpos(const Arg *arg) {
	int n, i;
	Client *c, *l;

	if(!selmon->cl->clients)
		return -1;

	if(arg->i == PREVSEL) {
		for(l = selmon->cl->stack; l && (!ISVISIBLE(l, selmon) || l == selmon->sel); l = l->snext);
		if(!l)
			return -1;
		for(i = 0, c = selmon->cl->clients; c != l; i += ISVISIBLE(c, selmon) ? 1 : 0, c = c->next);
		return i;
	}
	else if(ISINC(arg->i)) {
		if(!selmon->sel)
			return -1;
		for(i = 0, c = selmon->cl->clients; c != selmon->sel; i += ISVISIBLE(c, selmon) ? 1 : 0, c = c->next);
		for(n = i; c; n += ISVISIBLE(c, selmon) ? 1 : 0, c = c->next);
		return MOD(i + GETINC(arg->i), n);
	}
	else if(arg->i < 0) {
		for(i = 0, c = selmon->cl->clients; c; i += ISVISIBLE(c, selmon) ? 1 : 0, c = c->next);
		return MAX(i + arg->i, 0);
	}
	else
		return arg->i;
}

void
tag(const Arg *arg)
{
	Monitor *m;
	unsigned int newtags;
	if (selmon->sel && arg->ui & TAGMASK) {
		newtags = arg->ui & TAGMASK;
		for (m = mons; m; m = m->next)
			/* if tag is visible on another monitor, move client to the new monitor */
			if (m != selmon && m->tagset[m->seltags] & newtags) {
				/* prevent moving client to all tags (MODKEY-Shift-0) when multiple monitors are connected */
				if(newtags & selmon->tagset[selmon->seltags])
					return;
				selmon->sel->tags = newtags;
				selmon->sel->mon = m;
				arrange(m);
				break;
			}
		/* workaround in case just one monitor is connected */

		selmon->sel->tags = arg->ui & TAGMASK;
		focus(NULL);
		arrange(selmon);
	}
}

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;
		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
tile(Monitor *m)
{
	unsigned int i, n, h, mw, my, ty;
	Client *c;

	for (n = 0, c = nexttiled(m->cl->clients, m); c; c = nexttiled(c->next, m), n++);
	if (n == 0)
		return;

	if (n > m->nmaster)
		mw = m->nmaster ? m->ww * m->mfact : 0;
	else
		mw = m->ww;
	for (i = my = ty = 0, c = nexttiled(m->cl->clients, m); c; c = nexttiled(c->next, m), i++)
		if (i < m->nmaster) {
			h = (m->wh - my) / (MIN(n, m->nmaster) - i);
			resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), 0);
			if (my + HEIGHT(c) < m->wh)
				my += HEIGHT(c);
		} else {
			h = (m->wh - ty) / (n - i);
			resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), 0);
			if (ty + HEIGHT(c) < m->wh)
				ty += HEIGHT(c);
		}
}

void
togglebar(const Arg *arg)
{
	Bar *bar;
	selmon->showbar = !selmon->showbar;
	updatebarpos(selmon);
	for (bar = selmon->bar; bar; bar = bar->next)
		XMoveResizeWindow(dpy, bar->win, bar->bx, bar->by, bar->bw, bar->bh);
	arrange(selmon);
}

void
togglefloating(const Arg *arg)
{
	if (!selmon->sel)
		return;
	if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
		return;
	selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
	if (selmon->sel->isfloating)
		resize(selmon->sel, selmon->sel->x, selmon->sel->y,
			selmon->sel->w, selmon->sel->h, 0);
	arrange(selmon);
}

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

    setfullscreen(selmon->sel, !selmon->sel->isfullscreen);
}

void
togglescratch(const Arg *arg)
{
	Client *c;
	unsigned int found = 0;
	unsigned int scratchtag = SPTAG(arg->ui);
	Arg sparg = {.v = scratchpads[arg->ui].cmd};

	for (c = selmon->cl->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, selmon)) {
			focus(c);
			restack(selmon);
		}
	} else {
		selmon->tagset[selmon->seltags] |= scratchtag;
		spawn(&sparg);
	}
}

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

	if (!selmon->sel)
		return;
	newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
	if (newtags) {
		/* prevent adding tags that are in use on other monitors */
		for (m = mons; m; m = m->next)
			if (m != selmon && newtags & m->tagset[m->seltags])
				return;
		selmon->sel->tags = newtags;
		focus(NULL);
		arrange(selmon);
	}
	updatecurrentdesktop();
}

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

	/* prevent displaying the same tags on multiple monitors */
	for(m = mons; m; m = m->next)
		if(m != selmon && newtagset & m->tagset[m->seltags])
			return;
	selmon->tagset[selmon->seltags] = newtagset;
	attachclients(selmon);
	arrange(selmon);
	focus(NULL);
	updatecurrentdesktop();
}

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;

	detach(c);
	detachstack(c);
	if (!destroyed) {
		wc.border_width = c->oldbw;
		XGrabServer(dpy); /* avoid race conditions */
		XSetErrorHandler(xerrordummy);
		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);
	focus(NULL);
	updateclientlist();
	arrange(m);
}

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);
		drawbarwin(systray->bar);
	}
}

void
updatebars(void)
{
	Bar *bar;
	Monitor *m;
	XSetWindowAttributes wa = {
		.override_redirect = True,
		#if BAR_ALPHA_PATCH
		.background_pixel = 0,
		.border_pixel = 0,
		.colormap = cmap,
		#else
		.background_pixmap = ParentRelative,
		#endif // BAR_ALPHA_PATCH
		.event_mask = ButtonPressMask|ExposureMask
	};
	XClassHint ch = {"dwm", "dwm"};
	for (m = mons; m; m = m->next) {
		for (bar = m->bar; bar; bar = bar->next) {
			if (!bar->win) {
				#if BAR_ALPHA_PATCH
				bar->win = XCreateWindow(dpy, root, bar->bx, bar->by, bar->bw, bar->bh, 0, depth,
						InputOutput, visual,
						CWOverrideRedirect|CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &wa);
				#else
				bar->win = XCreateWindow(dpy, root, bar->bx, bar->by, bar->bw, bar->bh, 0, DefaultDepth(dpy, screen),
						CopyFromParent, DefaultVisual(dpy, screen),
						CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
				#endif // BAR_ALPHA_PATCH
				XDefineCursor(dpy, bar->win, cursor[CurNormal]->cursor);
				XMapRaised(dpy, bar->win);
				XSetClassHint(dpy, bar->win, &ch);
			}
		}
	}
}

void
updatebarpos(Monitor *m)
{
	m->wy = m->my;
	m->wh = m->mh;
	int num_bars;
	Bar *bar;
	int y_pad = 0;
	int x_pad = 0;

	for (bar = m->bar; bar; bar = bar->next) {
		bar->bx = m->mx + x_pad;
		bar->bw = m->ww - 2 * x_pad;
		bar->bh = bh;
	}

	if (!m->showbar) {
		for (bar = m->bar; bar; bar = bar->next)
			bar->by = -bh - y_pad;
		return;
	}

	for (num_bars = 0, bar = m->bar; bar; bar = bar->next, num_bars++)
		if (bar->topbar)
			m->wy = m->my + bh + y_pad;
	m->wh = m->wh - y_pad * num_bars - bh * num_bars;

	for (bar = m->bar; bar; bar = bar->next)
		bar->by = (bar->topbar ? m->wy - bh : m->wy + m->wh);
}

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

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

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

void updatecurrentdesktop(void){
	long rawdata[] = { selmon->tagset[selmon->seltags] };
	int i=0;
	while(*rawdata >> (i+1)){
		i++;
	}
	long data[] = { i };
	XChangeProperty(dpy, root, netatom[NetCurrentDesktop], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 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;
		if (n <= nn) { /* new monitors available */
			for (i = 0; i < (nn - n); i++) {
				for (m = mons; m && m->next; m = m->next);
				if (m) {
					m->next = createmon();
					attachclients(m->next);
				}
				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);
				}
		} else { /* less monitors available nn < n */
			for (i = nn; i < n; i++) {
				for (m = mons; m && m->next; m = m->next);
				if (m == selmon)
					selmon = mons;
				for (c = m->cl->clients; c; c = c->next) {
					dirty = True;
					if (c->mon == m)
						c->mon = selmon;
				}
				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
updatemotifhints(Client *c)
{
	Atom real;
	int format;
	unsigned char *p = NULL;
	unsigned long n, extra;
	unsigned long *motif;
	int width, height;

	if (!decorhints)
		return;

	if (XGetWindowProperty(dpy, c->win, motifatom, 0L, 5L, False, motifatom,
	                       &real, &format, &n, &extra, &p) == Success && p != NULL) {
		motif = (unsigned long*)p;
		if (motif[MWM_HINTS_FLAGS_FIELD] & MWM_HINTS_DECORATIONS) {
			width = WIDTH(c);
			height = HEIGHT(c);

			if (motif[MWM_HINTS_DECORATIONS_FIELD] & MWM_DECOR_ALL ||
			    motif[MWM_HINTS_DECORATIONS_FIELD] & MWM_DECOR_BORDER ||
			    motif[MWM_HINTS_DECORATIONS_FIELD] & MWM_DECOR_TITLE)
				c->bw = c->oldbw = borderpx;
			else
				c->bw = c->oldbw = 0;

			resize(c, c->x, c->y, width - (2*c->bw), height - (2*c->bw), 0);
		}
		XFree(p);
	}
}

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);
}

void
updatestatus(void)
{
	Monitor *m;
	if (!gettextprop(root, XA_WM_NAME, rawstext, sizeof(rawstext))) {
		strcpy(stext, "dwm-"VERSION);
		estext[0] = '\0';
	} else {
		char *e = strchr(rawstext, statussep);
		if (e) {
			*e = '\0'; e++;
			strncpy(rawestext, e, sizeof(estext) - 1);
			copyvalidchars(estext, rawestext);
		} else
			estext[0] = '\0';
		copyvalidchars(stext, rawstext);
	}
	for (m = mons; m; m = m->next)
		drawbar(m);
}

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

	if (state == netatom[NetWMFullscreen])
		setfullscreen(c, 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
focusorview(const Arg *arg)
{
	Monitor *m;

	for (m = mons; m; m = m->next) {
		if (m->tagset[m->seltags] & arg->ui) {
			unfocus(selmon->sel, 0);
			selmon = m;
			focus(NULL);
			warp(selmon->sel);
			return;
		}
	}
	view(arg);
}

void
view(const Arg *arg)
{
	Monitor *m;
	Client *fs = NULL;
	unsigned int newtagset = selmon->tagset[selmon->seltags ^ 1];
	if (arg->ui && (arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
		return;
	/* swap tags when trying to display a tag from another monitor */
	if (arg->ui & TAGMASK)
		newtagset = arg->ui & TAGMASK;
	for (m = mons; m; m = m->next)
		if (m != selmon && newtagset & m->tagset[m->seltags]) {
			/* prevent displaying all tags (MODKEY-0) when multiple monitors
			 * are connected */
			if (newtagset & selmon->tagset[selmon->seltags])
				return;
			// TODO handle fullscreen clients if they do switch monitor (see https://raw.githubusercontent.com/bakkeby/patches/master/dwm/dwm-tagmonfixfs-6.3.diff for reference)
			m->sel = selmon->sel;
			m->seltags ^= 1;
			m->tagset[m->seltags] = selmon->tagset[selmon->seltags];
			attachclients(m);
			arrange(m);
			break;
		}
	selmon->seltags ^= 1; /* toggle sel tagset */
	if (arg->ui & TAGMASK)
		selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
	for (Client *c = selmon->cl->clients; c; c = c->next) {
		if (!c->isfullscreen)
			continue;
		c->isfullscreen = 0;
		fs = fs ? NULL : c; // if two clients are fullscreen on the new view, disable fullscreen for every clients.
	}
	attachclients(selmon);
	arrange(selmon);
	if (fs) {
		fs->isfullscreen = 1;
		resizeclient(fs, fs->mon->mx, fs->mon->my, fs->mon->mw, fs->mon->mh);
		XRaiseWindow(dpy, fs->win);

	}
	focus(NULL);
	updatecurrentdesktop();
	warp(selmon->sel);
}

void
warp(const Client *c)
{
	int x, y;

	if (!c) {
		XWarpPointer(dpy, None, root, 0, 0, 0, 0, selmon->wx + selmon->ww/2, selmon->wy + selmon->wh/2);
		return;
	}

	if (!getrootptr(&x, &y))
		return;

	if (x > c->x - c->bw &&
		y > c->y - c->bw &&
		x < c->x + c->w + c->bw*2 &&
		y < c->y + c->h + c->bw*2)
		return;


	for (Monitor *m = mons; m; m = m->next)
		for (Bar *bar = m->bar; bar; bar = bar->next)
			if (x > bar->bx &&
				x < bar->bx + bar->bw &&
				y > bar->by &&
				y < bar->by + bar->bh)
				return;

	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
}

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

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

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

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

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

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

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

int
main(int argc, char *argv[])
{
	if (argc == 2 && !strcmp("-v", argv[1]))
		die("dwm-"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");
	checkotherwm();
        XrmInitialize();
        loadxrdb();
	setup();
#ifdef __OpenBSD__
	if (pledge("stdio rpath proc exec", NULL) == -1)
		die("pledge");
#endif /* __OpenBSD__ */
	scan();
	run();
	cleanup();
	XCloseDisplay(dpy);
	return EXIT_SUCCESS;
}