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().
 */
#define _POSIX_C_SOURCE 200809L
#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/Xutil.h>
#include <X11/Xresource.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 "drw.h"
#include "util.h"
#include <sys/utsname.h>

/* macros */
#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 ISINC(X) ((X) > 1000 && (X) < 3000)
#define ISVISIBLEONTAG(C, T) ((C->tags & T))
#define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]) || C->issticky)
#define PREVSEL 3000
#define LENGTH(X) (sizeof X / sizeof X[0])
#define MOUSEMASK (BUTTONMASK | PointerMotionMask)
#define MOD(N, M) ((N) % (M) < 0 ? (N) % (M) + (M) : (N) % (M))
#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 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 TRUNC(X, A, B) (MAX((A), MIN((X), (B))))

/* enums */
enum
{
	CurNormal,
	CurResize,
	CurMove,
	CurLast
}; /* cursor */
enum
{
	SchemeNorm,
	SchemeSel
}; /* color schemes */
enum
{
	NetSupported,
	NetWMName,
	NetWMState,
	NetWMCheck,
	NetWMFullscreen,
	NetActiveWindow,
	NetWMWindowType,
	NetWMWindowTypeDialog,
	NetClientList,
	NetLast
}; /* EWMH atoms */
enum
{
	WMProtocols,
	WMDelete,
	WMState,
	WMTakeFocus,
	WMLast
}; /* default atoms */
enum
{
	ClkTagBar,
	ClkLtSymbol,
	ClkStatusText,
	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;
	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, isterminal, noswallow, issticky;
	int floatborderpx;
	int hasfloatbw;
	int issteam;
	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 isfloating;
	int isterminal;
	int noswallow;
	int monitor;
	int floatx, floaty, floatw, floath;
	int floatborderpx;
} Rule;

/* Xresources preferences */
enum resource_type
{
	STRING = 0,
	INTEGER = 1,
	FLOAT = 2
};

typedef struct
{
	char *name;
	enum resource_type type;
	void *dst;
} ResourcePref;

/* function declarations */
static void applydefaultlayouts();
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 attachaside(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 void copyvalidchars(char *text, char *rawtext);
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 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 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 loadxrdb(void);
static void manage(Window w, XWindowAttributes *wa);
static void mappingnotify(XEvent *e);
static void maprequest(XEvent *e);
static void motionnotify(XEvent *e);
static void movemouse(const Arg *arg);
static Client *nexttagged(Client *c);
static Client *nexttiled(Client *c);
static void pop(Client *);
static void propertynotify(XEvent *e);
static void pushstack(const Arg *arg);
static void quit(const Arg *arg);
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 runAutostart(void);
static void scan(void);
static int sendevent(Client *c, Atom proto);
static void sendmon(Client *c, Monitor *m);
static void setclientstate(Client *c, long state);
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 setup(void);
static void seturgent(Client *c, int urg);
static void showhide(Client *c);
static void sigchld(int unused);
#ifndef __OpenBSD__
static int getdwmblockspid();
static void sigdwmblocks(const Arg *arg);
#endif
static void sighup(int unused);
static void sigterm(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 togglebar(const Arg *arg);
static void togglefloating(const Arg *arg);
static void togglescratch(const Arg *arg);
static void togglesticky(const Arg *arg);
static void togglefullscr(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 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 updatetitle(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 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);
static void load_xresources(void);
static void resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst);

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[256];
static char rawstext[256];
static int dwmblockssig;
pid_t dwmblockspid = 0;
static int screen;
static int sw, sh;		/* X display screen geometry width, height */
static int bh, blw = 0; /* bar geometry */
static int lrpad;		/* sum of left and right padding for text */
static int vp;			/* vertical padding for bar */
static int sp;			/* side padding for bar */
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,
	[UnmapNotify] = unmapnotify};
static Atom wmatom[WMLast], netatom[NetLast];
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 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  */
	int showbars[LENGTH(tags) + 1];			   /* display bar for the current tag */
	Client *sel[LENGTH(tags) + 1];			   /* selected client */
};

/* 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 applydefaultlayouts()
{
	Monitor *m;
	int i = 0;
	for (m = mons; m; m = m->next)
	{
		if (i < LENGTH(lpm))
		{
			m->lt[0] = &layouts[lpm[i]];
			m->lt[1] = &layouts[(lpm[i] + 1) % LENGTH(layouts)];
			strncpy(m->ltsymbol, layouts[i].symbol, sizeof m->ltsymbol);
		}
		i++;
	}
}

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

	/* 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;

	if (strstr(class, "Steam") || strstr(class, "steam_app_"))
		c->issteam = 1;

	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->isfloating = r->isfloating;
			c->noswallow = r->noswallow;
			c->tags |= r->tags;
			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);
			}
			if (r->floatborderpx >= 0)
			{
				c->floatborderpx = r->floatborderpx;
				c->hasfloatbw = 1;
			}
			if (r->isfloating)
			{
				if (r->floatx >= 0)
					c->x = c->mon->mx + r->floatx;
				if (r->floaty >= 0)
					c->y = c->mon->my + r->floaty;
				if (r->floatw >= 0)
					c->w = r->floatw;
				if (r->floath >= 0)
					c->h = r->floath;
			}
			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] & ~SPTAGMASK);
}

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)
	{
		/* 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 attachaside(Client *c)
{
	Client *at = nexttagged(c);
	if (!at)
	{
		attach(c);
		return;
	}
	c->next = at->next;
	at->next = 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 (!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);

	XWindowChanges wc;
	wc.border_width = p->bw;
	XConfigureWindow(dpy, p->win, CWBorderWidth, &wc);
	XMoveResizeWindow(dpy, p->win, p->x, p->y, p->w, p->h);
	XSetWindowBorder(dpy, p->win, scheme[SchemeNorm][ColBorder].pixel);

	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);

	XWindowChanges wc;
	wc.border_width = c->bw;
	XConfigureWindow(dpy, c->win, CWBorderWidth, &wc);
	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
	XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);

	setclientstate(c, NormalState);
	focus(NULL);
	arrange(c->mon);
}

void buttonpress(XEvent *e)
{
	unsigned int i, x, click, occ = 0;
	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;
		for (c = m->clients; c; c = c->next)
			occ |= c->tags == 255 ? 0 : 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 + blw)
			click = ClkLtSymbol;
		else if (ev->x > (x = selmon->ww - TEXTW(stext) + lrpad - 2 * sp))
		{
			click = ClkStatusText;

			char *text = rawstext;
			int i = -1;
			char ch;
			dwmblockssig = 0;
			while (text[++i])
			{
				if ((unsigned char)text[i] < ' ')
				{
					ch = text[i];
					text[i] = '\0';
					x += TEXTW(text) - lrpad;
					text[i] = ch;
					text += i + 1;
					i = -1;
					if (x >= ev->x)
						break;
					dwmblockssig = ch;
				}
			}
		}
		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);
	for (i = 0; i < CurLast; i++)
		drw_cur_free(drw, cursor[i]);
	for (i = 0; i < LENGTH(colors); 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;

	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);
}

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

	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])
	{
		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)
						resizeclient(c, m->mx, m->my, m->mw, m->mh);
				XMoveResizeWindow(dpy, m->barwin, m->wx + sp, m->by + vp, m->ww - 2 * sp, 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 (!c->issteam)
			{
				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);
}

void copyvalidchars(char *text, char *rawtext)
{
	int i = -1, j = 0;

	while (rawtext[++i])
	{
		if ((unsigned char)rawtext[i] >= ' ')
		{
			text[j++] = rawtext[i];
		}
	}
	text[j] = '\0';
}

Monitor *
createmon(void)
{
	Monitor *m;
	unsigned 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);
	m->pertag = ecalloc(1, sizeof(Pertag));
	m->pertag->curtag = m->pertag->prevtag = 1;

	for (i = 0; i <= LENGTH(tags); i++)
	{
		m->pertag->nmasters[i] = m->nmaster;
		m->pertag->mfacts[i] = m->mfact;

		m->pertag->ltidxs[i][0] = m->lt[0];
		m->pertag->ltidxs[i][1] = m->lt[1];
		m->pertag->sellts[i] = m->sellt;

		m->pertag->showbars[i] = m->showbar;
	}

	return m;
}

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);
}

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;
}

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

	/* draw status first so it can be overdrawn by tags later */
	if (m == selmon)
	{ /* status is only drawn on selected monitor */
		drw_setscheme(drw, scheme[SchemeNorm]);
		tw = TEXTW(stext) - lrpad + 2; /* 2px right padding */
		drw_text(drw, m->ww - tw - 2 * sp, 0, tw, bh, 0, stext, 0);
	}

	for (c = m->clients; c; c = c->next)
	{
		occ |= c->tags == 255 ? 0 : c->tags;
		if (c->isurgent)
			urg |= c->tags;
	}
	x = 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]);
		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;
	}
	// Only show layout symbol if it isn't the default one
	if (m->lt[m->sellt] != &layouts[0])
	{
		w = blw = TEXTW(m->ltsymbol);
		drw_setscheme(drw, scheme[SchemeNorm]);
		x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
	}

	if ((w = m->ww - tw - x) > bh)
	{
		if (m->sel)
		{
			drw_setscheme(drw, scheme[m == selmon ? SchemeSel : SchemeNorm]);
			drw_text(drw, x, 0, w - 2 * sp, bh, lrpad / 2, m->sel->name, 0);
			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 - 2 * sp, 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);
}

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 focus(Client *c)
{
	if (!c || !ISVISIBLE(c))
	{
		for (c = selmon->stack; c && (!ISVISIBLE(c) || (c->issticky && !selmon->sel->issticky)); c = c->snext)
			;

		if (!c) /* No windows found; check for available stickies */
			for (c = selmon->stack; c && !ISVISIBLE(c); 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;
	selmon->pertag->sel[selmon->pertag->curtag] = 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)
{
	int i = stackpos(arg);
	Client *c, *p;

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

	for (p = NULL, c = selmon->clients; c && (i || !ISVISIBLE(c));
		 i -= ISVISIBLE(c) ? 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;

	if (XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
						   &da, &di, &dl, &dl, &p) == Success &&
		p)
	{
		atom = *(Atom *)p;
		XFree(p);
	}
	return atom;
}

#ifndef __OpenBSD__
int getdwmblockspid()
{
	char buf[16];
	FILE *fp = popen("pidof -s dwmblocks", "r");
	fgets(buf, sizeof(buf), fp);
	pid_t pid = strtoul(buf, NULL, 10);
	pclose(fp);
	dwmblockspid = pid;
	return pid != 0 ? 0 : -1;
}
#endif

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 = 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 = 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, wmatom[WMDelete]))
	{
		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.color4", normfgcolor);
				XRDB_LOAD_COLOR("dwm.color8", selbordercolor);
				XRDB_LOAD_COLOR("dwm.color4", selbgcolor);
				XRDB_LOAD_COLOR("dwm.color0", selfgcolor);
			}
		}
	}

	XCloseDisplay(display);
}

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;

	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->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->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);
	c->bw = borderpx;

	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);
	c->x = c->mon->mx + (c->mon->mw - WIDTH(c)) / 2;
	c->y = c->mon->my + (c->mon->mh - HEIGHT(c)) / 2;
	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);
	attachaside(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 (selmon->sel && selmon->sel->isfullscreen && !c->isfloating)
		setfullscreen(selmon->sel, 0);
	if (c->mon == selmon)
		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;

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

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) /* 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 / 244))
				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 *
nexttagged(Client *c)
{
	Client *walked = c->mon->clients;
	for (;
		 walked && (walked->isfloating || !ISVISIBLEONTAG(walked, c->tags));
		 walked = walked->next)
		;
	return walked;
}

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

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

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

	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);
			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 == 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 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->isfloating && c->hasfloatbw && !c->isfullscreen)
		wc.border_width = c->floatborderpx;
	else
		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) /* 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 / 244))
				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->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 runAutostart(void)
{
	system("killall -q dwmblocks; dwmblocks &");
}

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 */
	attachaside(c);
	attachstack(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(Client *c, Atom proto)
{
	int n;
	Atom *protocols;
	int exists = 0;
	XEvent ev;

	if (XGetWMProtocols(dpy, c->win, &protocols, &n))
	{
		while (!exists && n--)
			exists = protocols[n] == proto;
		XFree(protocols);
	}
	if (exists)
	{
		ev.type = ClientMessage;
		ev.xclient.window = c->win;
		ev.xclient.message_type = wmatom[WMProtocols];
		ev.xclient.format = 32;
		ev.xclient.data.l[0] = proto;
		ev.xclient.data.l[1] = CurrentTime;
		XSendEvent(dpy, c->win, False, NoEventMask, &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, wmatom[WMTakeFocus]);
}

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);
	}
}

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

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

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

void setlayout(const Arg *arg)
{
	if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
		selmon->sellt = selmon->pertag->sellts[selmon->pertag->curtag] ^= 1;
	if (arg && arg->v)
		selmon->lt[selmon->sellt] = selmon->pertag->ltidxs[selmon->pertag->curtag][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 = selmon->pertag->mfacts[selmon->pertag->curtag] = f;
	arrange(selmon);
}

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

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

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

	/* init screen */
	screen = DefaultScreen(dpy);
	sw = DisplayWidth(dpy, screen);
	sh = DisplayHeight(dpy, screen);
	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;
	bh = drw->fonts->h + 2;
	sp = sidepad;
	vp = (topbar == 1) ? vertpad : -vertpad;
	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[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[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
	netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", 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), sizeof(Clr *));
	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);
	XDeleteProperty(dpy, root, netatom[NetClientList]);
	/* 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))
	{
		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 sighup(int unused)
{
	Arg a = {.i = 1};
	quit(&a);
}

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

#ifndef __OpenBSD__
void sigdwmblocks(const Arg *arg)
{
	union sigval sv;
	sv.sival_int = 0 | (dwmblockssig << 8) | arg->i;
	if (!dwmblockspid)
		if (getdwmblockspid() == -1)
			return;

	if (sigqueue(dwmblockspid, SIGUSR1, sv) == -1)
	{
		if (errno == ESRCH)
		{
			if (!getdwmblockspid())
				sigqueue(dwmblockspid, SIGUSR1, sv);
		}
	}
}
#endif

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);
	}
}

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

void tagmon(const Arg *arg)
{
	if (!selmon->sel || !mons->next)
		return;
	sendmon(selmon->sel, 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 + sp, selmon->by + vp, selmon->ww - 2 * sp, 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 togglefullscr(const Arg *arg)
{
	if (selmon->sel)
		setfullscreen(selmon->sel, !selmon->sel->isfullscreen);
}

void togglesticky(const Arg *arg)
{
	if (!selmon->sel)
		return;
	selmon->sel->issticky = !selmon->sel->issticky;
	arrange(selmon);
}

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->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
	{
		selmon->tagset[selmon->seltags] |= scratchtag;
		spawn(&sparg);
	}
}

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;
		focus(NULL);
		arrange(selmon);
	}
}

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

	if (newtagset)
	{
		selmon->tagset[selmon->seltags] = 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;
		}

		/* 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 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)
{
	int i;
	Monitor *m = c->mon;
	XWindowChanges wc;

	for (i = 0; i < LENGTH(tags) + 1; i++)
		if (c->mon->pertag->sel[i] == c)
			c->mon->pertag->sel[i] = NULL;

	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);
	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);

	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);
	}
}

void updatebars(void)
{
	Monitor *m;
	XSetWindowAttributes wa = {
		.override_redirect = True,
		.background_pixmap = ParentRelative,
		.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 + sp, m->by + vp, m->ww - 2 * sp, bh, 0, DefaultDepth(dpy, screen),
								  CopyFromParent, DefaultVisual(dpy, screen),
								  CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
		XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
		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 = m->wh - vertpad - bh;
		m->by = m->topbar ? m->wy : m->wy + m->wh + vertpad;
		m->wy = m->topbar ? m->wy + bh + vp : m->wy;
	}
	else
		m->by = -bh - vp;
}

void updateclientlist()
{
	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;
		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();
				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)
					;
				while ((c = m->clients))
				{
					dirty = 1;
					m->clients = c->next;
					detachstack(c);
					c->mon = mons;
					attachaside(c);
					attachstack(c);
				}
				if (m == selmon)
					selmon = mons;
				cleanupmon(m);
			}
		}
		applydefaultlayouts();
		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);
}

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

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]);
	Atom wtype = getatomprop(c, netatom[NetWMWindowType]);

	if (state == netatom[NetWMFullscreen])
		setfullscreen(c, 1);
	if (wtype == netatom[NetWMWindowTypeDialog])
		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->tagset[selmon->seltags] = arg->ui & TAGMASK;
		selmon->pertag->prevtag = selmon->pertag->curtag;

		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(selmon->pertag->sel[selmon->pertag->curtag]);
	arrange(selmon);
}

pid_t winpid(Window w)
{
	pid_t result = 0;

	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;
	return result;
}

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

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

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

	if (fscanf(f, "%*u %*s %*c %u", (unsigned *)&v) != 1)
		v = (pid_t)0;
	fclose(f);
#elif defined(__FreeBSD__)
	struct kinfo_proc *proc = kinfo_getproc(p);
	if (!proc)
		return (pid_t)0;

	v = proc->ki_ppid;
	free(proc);
#endif
	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;
}

/* 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->clients))
		if (!c || !(c = nexttiled(c->next)))
			return;
	pop(c);
}

void resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
{
	char *sdst = NULL;
	int *idst = NULL;
	float *fdst = NULL;

	sdst = dst;
	idst = dst;
	fdst = dst;

	char fullname[256];
	char *type;
	XrmValue ret;

	snprintf(fullname, sizeof(fullname), "%s.%s", "dwm", name);
	fullname[sizeof(fullname) - 1] = '\0';

	XrmGetResource(db, fullname, "*", &type, &ret);
	if (!(ret.addr == NULL || strncmp("String", type, 64)))
	{
		switch (rtype)
		{
		case STRING:
			strcpy(sdst, ret.addr);
			break;
		case INTEGER:
			*idst = strtoul(ret.addr, NULL, 10);
			break;
		case FLOAT:
			*fdst = strtof(ret.addr, NULL);
			break;
		}
	}
}

void load_xresources(void)
{
	Display *display;
	char *resm;
	XrmDatabase db;
	ResourcePref *p;

	display = XOpenDisplay(NULL);
	resm = XResourceManagerString(display);
	if (!resm)
		return;

	db = XrmGetStringDatabase(resm);
	for (p = resources; p < resources + LENGTH(resources); p++)
		resource_load(db, p->name, p->type, p->dst);
	XCloseDisplay(display);
}

int main(int argc, char *argv[])
{
	if (argc == 2 && !strcmp("-v", argv[1]))
		die("dwm-");
	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();
	load_xresources();
	setup();
#ifdef __OpenBSD__
	if (pledge("stdio rpath proc exec", NULL) == -1)
		die("pledge");
#endif /* __OpenBSD__ */
	scan();
	runAutostart();
	run();
	if (restart)
		execvp(argv[0], argv);
	cleanup();
	XCloseDisplay(dpy);
	return EXIT_SUCCESS;
}