X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=dwm.c;h=b54ccd4f30e9c068be1453b62fb4caf9e45075cc;hb=ab06f7444bf558d4a58e6ca617b1b4f55c6b00c7;hp=48e0dd1a4294c7c45dcf5fa42b8ce33a5f254e89;hpb=508922b90db66b88cfb66e81b8d48065d13f6bc1;p=dwm.git

diff --git a/dwm.c b/dwm.c
index 48e0dd1..b54ccd4 100644
--- a/dwm.c
+++ b/dwm.c
@@ -1,3 +1,4 @@
+//#define XINULATOR /* debug, simulates dual head */
 /* See LICENSE file for copyright and license details.
  *
  * dynamic window manager is designed like any other X client as well. It is
@@ -6,18 +7,15 @@
  * events about window (dis-)appearance.  Only one X connection at a time is
  * allowed to select for this event mask.
  *
- * Calls to fetch an X event from the event queue are blocking.  Due reading
- * status text from standard input, a select()-driven main loop has been
- * implemented which selects for reads on the X connection and STDIN_FILENO to
- * handle all data smoothly. 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.
+ * 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 global
- * doubly-linked client list, the focus history is remembered through a global
- * stack list. Each client contains an array of Bools of the same size as the
- * global tags array to indicate the tags of a client.  
+ * linked client list, the focus history is remembered through a global
+ * stack list. 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.
  *
@@ -26,55 +24,74 @@
 #include <errno.h>
 #include <locale.h>
 #include <stdarg.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <sys/select.h>
 #include <sys/types.h>
 #include <sys/wait.h>
-#include <regex.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>
-//#ifdef XINERAMA
+#ifdef XINERAMA
 #include <X11/extensions/Xinerama.h>
-//#endif
+#endif /* XINERAMA */
 
 /* macros */
-#define BUTTONMASK		(ButtonPressMask | ButtonReleaseMask)
-#define CLEANMASK(mask)		(mask & ~(numlockmask | LockMask))
-#define LENGTH(x)		(sizeof x / sizeof x[0])
-#define MAXTAGLEN		16
-#define MOUSEMASK		(BUTTONMASK | PointerMotionMask)
-
+#define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
+#define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask))
+#define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
+#define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
+#define LENGTH(X)               (sizeof X / sizeof X[0])
+#define MAX(A, B)               ((A) > (B) ? (A) : (B))
+#define MIN(A, B)               ((A) < (B) ? (A) : (B))
+#define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
+#define WIDTH(X)                ((X)->w + 2 * (X)->bw)
+#define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
+#define TAGMASK                 ((int)((1LL << LENGTH(tags)) - 1))
+#define TEXTW(X)                (textnw(X, strlen(X)) + dc.font.height)
 
 /* enums */
-enum { BarTop, BarBot, BarOff };			/* bar position */
-enum { CurNormal, CurResize, CurMove, CurLast };	/* cursor */
-enum { ColBorder, ColFG, ColBG, ColLast };		/* color */
-enum { NetSupported, NetWMName, NetLast };		/* EWMH atoms */
-enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
+enum { CurNormal, CurResize, CurMove, CurLast };        /* cursor */
+enum { ColBorder, ColFG, ColBG, ColLast };              /* color */
+enum { NetSupported, NetWMName, NetLast };              /* EWMH atoms */
+enum { WMProtocols, WMDelete, WMState, WMLast };        /* default atoms */
+enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
+       ClkClientWin, ClkRootWin, ClkLast };             /* clicks */
+
+typedef union {
+	int i;
+	unsigned int ui;
+	float f;
+	void *v;
+} Arg;
+
+typedef struct {
+	unsigned int click;
+	unsigned int mask;
+	unsigned int button;
+	void (*func)(const Arg *arg);
+	const Arg arg;
+} Button;
 
-/* typedefs */
+typedef struct Monitor Monitor;
 typedef struct Client Client;
 struct Client {
 	char name[256];
+	float mina, maxa;
 	int x, y, w, h;
 	int basew, baseh, incw, inch, maxw, maxh, minw, minh;
-	int minax, maxax, minay, maxay;
-	long flags;
-	unsigned int border, oldborder;
-	Bool isbanned, isfixed, isfloating, isurgent;
-	Bool *tags;
+	int bw, oldbw;
+	unsigned int tags;
+	Bool isfixed, isfloating, isurgent;
 	Client *next;
-	Client *prev;
 	Client *snext;
+	Monitor *mon;
 	Window win;
-	int monitor;
 };
 
 typedef struct {
@@ -93,134 +110,136 @@ typedef struct {
 } DC; /* draw context */
 
 typedef struct {
-	unsigned long mod;
+	unsigned int mod;
 	KeySym keysym;
-	void (*func)(const char *arg);
-	const char *arg;
+	void (*func)(const Arg *);
+	const Arg arg;
 } Key;
 
 typedef struct {
 	const char *symbol;
-	void (*arrange)(void);
+	void (*arrange)(Monitor *);
 } Layout;
 
+struct Monitor {
+	int screen_number;
+	float mfact;
+	int by, btx;          /* bar geometry */
+	int my, mh;           /* vertical screen size*/
+	int wx, wy, ww, wh;   /* window area  */
+	unsigned int seltags;
+	unsigned int sellt;
+	unsigned int tagset[2];
+	Bool showbar;
+	Bool topbar;
+	Client *clients;
+	Client *sel;
+	Client *stack;
+	Monitor *next;
+	Window barwin;
+};
+
 typedef struct {
-	const char *prop;
-	const char *tags;
+	const char *class;
+	const char *instance;
+	const char *title;
+	unsigned int tags;
 	Bool isfloating;
-	int monitor;
 } Rule;
 
-typedef struct {
-	regex_t *propregex;
-	regex_t *tagregex;
-} Regs;
-
-typedef struct {
-	int screen;
-	Window root;
-	Window barwin;
-	int sx, sy, sw, sh, wax, way, wah, waw;
-	DC dc;
-	Bool *seltags;
-	Bool *prevtags;
-	Layout *layout;
-	double mwfact;
-} Monitor;
-
 /* function declarations */
-void applyrules(Client *c);
-void arrange(void);
-void attach(Client *c);
-void attachstack(Client *c);
-void ban(Client *c);
-void buttonpress(XEvent *e);
-void checkotherwm(void);
-void cleanup(void);
-void compileregs(void);
-void configure(Client *c);
-void configurenotify(XEvent *e);
-void configurerequest(XEvent *e);
-void destroynotify(XEvent *e);
-void detach(Client *c);
-void detachstack(Client *c);
-void drawbar(void);
-void drawsquare(Monitor *, Bool filled, Bool empty, unsigned long col[ColLast]);
-void drawtext(Monitor *, const char *text, unsigned long col[ColLast], Bool invert);
-void *emallocz(unsigned int size);
-void enternotify(XEvent *e);
-void eprint(const char *errstr, ...);
-void expose(XEvent *e);
-void floating(void); /* default floating layout */
-void focus(Client *c);
-void focusin(XEvent *e);
-void focusnext(const char *arg);
-void focusprev(const char *arg);
-Client *getclient(Window w);
-unsigned long getcolor(const char *colstr, int screen);
-long getstate(Window w);
-Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
-void grabbuttons(Client *c, Bool focused);
-void grabkeys(void);
-unsigned int idxoftag(const char *tag);
-void initfont(Monitor*, const char *fontstr);
-Bool isoccupied(Monitor *m, unsigned int t);
-Bool isprotodel(Client *c);
-Bool isurgent(int monitor, unsigned int t);
-Bool isvisible(Client *c, int monitor);
-void keypress(XEvent *e);
-void killclient(const char *arg);
-void manage(Window w, XWindowAttributes *wa);
-void mappingnotify(XEvent *e);
-void maprequest(XEvent *e);
-void movemouse(Client *c);
-Client *nexttiled(Client *c, int monitor);
-void propertynotify(XEvent *e);
-void quit(const char *arg);
-void reapply(const char *arg);
-void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
-void resizemouse(Client *c);
-void restack(void);
-void run(void);
-void scan(void);
-void setclientstate(Client *c, long state);
-void setlayout(const char *arg);
-void setmwfact(const char *arg);
-void setup(void);
-void spawn(const char *arg);
-void tag(const char *arg);
-unsigned int textnw(Monitor*, const char *text, unsigned int len);
-unsigned int textw(Monitor*, const char *text);
-void tile(void);
-void togglebar(const char *arg);
-void togglefloating(const char *arg);
-void toggletag(const char *arg);
-void toggleview(const char *arg);
-void unban(Client *c);
-void unmanage(Client *c);
-void unmapnotify(XEvent *e);
-void updatebarpos(Monitor *m);
-void updatesizehints(Client *c);
-void updatetitle(Client *c);
-void updatewmhints(Client *c);
-void view(const char *arg);
-void viewprevtag(const char *arg);	/* views previous selected tags */
-int xerror(Display *dpy, XErrorEvent *ee);
-int xerrordummy(Display *dsply, XErrorEvent *ee);
-int xerrorstart(Display *dsply, XErrorEvent *ee);
-void zoom(const char *arg);
-int monitorat(void);
-void movetomonitor(const char *arg);
-void selectmonitor(const char *arg);
+static void applyrules(Client *c);
+static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h);
+static void arrange(void);
+static void attach(Client *c);
+static void attachstack(Client *c);
+static void buttonpress(XEvent *e);
+static void checkotherwm(void);
+static void cleanup(void);
+static void cleanupmons(void);
+static void clearurgent(Client *c);
+static void configure(Client *c);
+static void configurenotify(XEvent *e);
+static void configurerequest(XEvent *e);
+static void destroynotify(XEvent *e);
+static void detach(Client *c);
+static void detachstack(Client *c);
+static void die(const char *errstr, ...);
+static void drawbar(Monitor *m);
+static void drawbars();
+static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
+static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
+static void enternotify(XEvent *e);
+static void expose(XEvent *e);
+static void focus(Client *c);
+static void focusin(XEvent *e);
+static void focusstack(const Arg *arg);
+static Client *getclient(Window w);
+static unsigned long getcolor(const char *colstr);
+static long getstate(Window w);
+static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
+static void grabbuttons(Client *c, Bool focused);
+static void grabkeys(void);
+static void initfont(const char *fontstr);
+static Bool isprotodel(Client *c);
+static void keypress(XEvent *e);
+static void killclient(const Arg *arg);
+static void manage(Window w, XWindowAttributes *wa);
+static void mappingnotify(XEvent *e);
+static void maprequest(XEvent *e);
+static void monocle(Monitor *m);
+static void movemouse(const Arg *arg);
+static Client *nexttiled(Client *c);
+static void propertynotify(XEvent *e);
+static void quit(const Arg *arg);
+static void resize(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 void setclientstate(Client *c, long state);
+static void setlayout(const Arg *arg);
+static void setmfact(const Arg *arg);
+static void setup(void);
+static void showhide(Client *c);
+static void sigchld(int signal);
+static void spawn(const Arg *arg);
+static void tag(const Arg *arg);
+static int textnw(const char *text, unsigned int len);
+static void tile(Monitor *);
+static void togglebar(const Arg *arg);
+static void togglefloating(const Arg *arg);
+static void toggletag(const Arg *arg);
+static void toggleview(const Arg *arg);
+static void unfocus(Client *c);
+static void unmanage(Client *c);
+static void unmapnotify(XEvent *e);
+static void updategeom(void);
+static void updatebarpos(Monitor *m);
+static void updatebars(void);
+static void updatenumlockmask(void);
+static void updatesizehints(Client *c);
+static void updatestatus(void);
+static void updatetitle(Client *c);
+static void updatewmhints(Client *c);
+static void view(const Arg *arg);
+static int xerror(Display *dpy, XErrorEvent *ee);
+static int xerrordummy(Display *dpy, XErrorEvent *ee);
+static int xerrorstart(Display *dpy, XErrorEvent *ee);
+static void zoom(const Arg *arg);
+#ifdef XINERAMA
+static void focusmon(const Arg *arg);
+static void tagmon(const Arg *arg);
+#endif /* XINERAMA */
 
 /* variables */
-char stext[256];
-int mcount = 1;
-int (*xerrorxlib)(Display *, XErrorEvent *);
-unsigned int bh, bpos;
-unsigned int blw = 0;
-unsigned int numlockmask = 0;
-void (*handler[LASTEvent]) (XEvent *) = {
+static char stext[256];
+static int screen;
+static int sx, sy, sw, sh;   /* X display screen geometry x, y, width, height */
+static int bh, blw = 0;      /* bar geometry */
+static int (*xerrorxlib)(Display *, XErrorEvent *);
+static unsigned int numlockmask = 0;
+static void (*handler[LASTEvent]) (XEvent *) = {
 	[ButtonPress] = buttonpress,
 	[ConfigureRequest] = configurerequest,
 	[ConfigureNotify] = configurenotify,
@@ -234,222 +253,252 @@ void (*handler[LASTEvent]) (XEvent *) = {
 	[PropertyNotify] = propertynotify,
 	[UnmapNotify] = unmapnotify
 };
-Atom wmatom[WMLast], netatom[NetLast];
-Bool isxinerama = False;
-Bool domwfact = True;
-Bool dozoom = True;
-Bool otherwm, readin;
-Bool running = True;
-Client *clients = NULL;
-Client *sel = NULL;
-Client *stack = NULL;
-Cursor cursor[CurLast];
-Display *dpy;
-DC dc = {0};
-Regs *regs = NULL;
-Monitor *monitors;
-int selmonitor = 0;
-
+static Atom wmatom[WMLast], netatom[NetLast];
+static Bool otherwm;
+static Bool running = True;
+static Cursor cursor[CurLast];
+static Display *dpy;
+static DC dc;
+static Layout *lt[] = { NULL, NULL };
+static Monitor *mons = NULL, *selmon = NULL;
+static Window root;
 /* configuration, allows nested code to access above variables */
 #include "config.h"
 
-//Bool prevtags[LENGTH(tags)];
+/* compile-time check if all tags fit into an unsigned int bit array. */
+struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
 
 /* function implementations */
 void
 applyrules(Client *c) {
-	static char buf[512];
-	unsigned int i, j;
-	regmatch_t tmp;
-	Bool matched_tag = False;
-	Bool matched_monitor = False;
+	unsigned int i;
+	Rule *r;
 	XClassHint ch = { 0 };
 
 	/* rule matching */
-	XGetClassHint(dpy, c->win, &ch);
-	snprintf(buf, sizeof buf, "%s:%s:%s",
-			ch.res_class ? ch.res_class : "",
-			ch.res_name ? ch.res_name : "", c->name);
-	for(i = 0; i < LENGTH(rules); i++)
-		if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
-			if (rules[i].monitor >= 0 && rules[i].monitor < mcount) {
-				matched_monitor = True;
-				c->monitor = rules[i].monitor;
+	c->isfloating = c->tags = 0;
+	if(XGetClassHint(dpy, c->win, &ch)) {
+		for(i = 0; i < LENGTH(rules); i++) {
+			r = &rules[i];
+			if((!r->title || strstr(c->name, r->title))
+			&& (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
+			&& (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
+				c->isfloating = r->isfloating;
+				c->tags |= r->tags;
 			}
+		}
+		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];
+}
 
-			c->isfloating = rules[i].isfloating;
-			for(j = 0; regs[i].tagregex && j < LENGTH(tags); j++) {
-				if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
-					matched_tag = True;
-					c->tags[j] = True;
-				}
-			}
+Bool
+applysizehints(Client *c, int *x, int *y, int *w, int *h) {
+	Bool baseismin;
+
+	/* set minimum possible */
+	*w = MAX(1, *w);
+	*h = MAX(1, *h);
+
+	if(*x > sx + sw)
+		*x = sw - WIDTH(c);
+	if(*y > sy + sh)
+		*y = sh - HEIGHT(c);
+	if(*x + *w + 2 * c->bw < sx)
+		*x = sx;
+	if(*y + *h + 2 * c->bw < sy)
+		*y = sy;
+	if(*h < bh)
+		*h = bh;
+	if(*w < bh)
+		*w = bh;
+
+	if(resizehints || c->isfloating) {
+		/* 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;
 		}
-	if(ch.res_class)
-		XFree(ch.res_class);
-	if(ch.res_name)
-		XFree(ch.res_name);
-	if(!matched_tag)
-		memcpy(c->tags, monitors[monitorat()].seltags, sizeof initags);
-	if (!matched_monitor)
-		c->monitor = monitorat();
+
+		/* adjust for aspect limits */
+		if(c->mina > 0 && c->maxa > 0) {
+			if(c->maxa < (float)*w / *h)
+				*w = *h * c->maxa;
+			else if(c->mina < (float)*h / *w)
+				*h = *w * c->mina;
+		}
+
+		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 += c->basew;
+		*h += c->baseh;
+
+		*w = MAX(*w, c->minw);
+		*h = MAX(*h, 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(void) {
-	Client *c;
-
-	for(c = clients; c; c = c->next)
-		if(isvisible(c, c->monitor))
-			unban(c);
-		else
-			ban(c);
+	Monitor *m;
 
-	monitors[selmonitor].layout->arrange();
+	/* optimise two loops into one, check focus(NULL) */
+	for(m = mons; m; m = m->next)
+		showhide(m->stack);
 	focus(NULL);
-	restack();
+	for(m = mons; m; m = m->next) {
+		if(lt[m->sellt]->arrange)
+			lt[m->sellt]->arrange(m);
+		restack(m);
+	}
 }
 
 void
 attach(Client *c) {
-	if(clients)
-		clients->prev = c;
-	c->next = clients;
-	clients = c;
+	c->next = c->mon->clients;
+	c->mon->clients = c;
 }
 
 void
 attachstack(Client *c) {
-	c->snext = stack;
-	stack = c;
-}
-
-void
-ban(Client *c) {
-	if(c->isbanned)
-		return;
-	XMoveWindow(dpy, c->win, c->x + 3 * monitors[c->monitor].sw, c->y);
-	c->isbanned = True;
+	c->snext = c->mon->stack;
+	c->mon->stack = c;
 }
 
 void
 buttonpress(XEvent *e) {
-	unsigned int i, x;
+	unsigned int i, x, click;
+	Arg arg = {0};
 	Client *c;
+	Monitor *m;
 	XButtonPressedEvent *ev = &e->xbutton;
 
-	Monitor *m = &monitors[monitorat()];
-
-	if(ev->window == m->barwin) {
-		x = 0;
-		for(i = 0; i < LENGTH(tags); i++) {
-			x += textw(m, tags[i]);
-			if(ev->x < x) {
-				if(ev->button == Button1) {
-					if(ev->state & MODKEY)
-						tag(tags[i]);
-					else
-						view(tags[i]);
-				}
-				else if(ev->button == Button3) {
-					if(ev->state & MODKEY)
-						toggletag(tags[i]);
-					else
-						toggleview(tags[i]);
-				}
-				return;
+	click = ClkRootWin;
+	/* focus monitor if necessary */
+	for(m = mons; m; m = m->next)
+		if(ev->window == m->barwin) {
+			if(m != selmon) {
+				unfocus(selmon->stack);
+				selmon = m;
+				focus(NULL);
 			}
+			break;
+		}
+	if(ev->window == selmon->barwin && ev->x >= selmon->btx) {
+		i = 0;
+		x = selmon->btx;
+		do
+			x += TEXTW(tags[i]);
+		while(ev->x >= x && ++i < LENGTH(tags));
+		if(i < LENGTH(tags)) {
+			click = ClkTagBar;
+			arg.ui = 1 << i;
 		}
-		if((ev->x < x + blw) && ev->button == Button1)
-			setlayout(NULL);
+		else if(ev->x < x + blw)
+			click = ClkLtSymbol;
+		else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
+			click = ClkStatusText;
+		else
+			click = ClkWinTitle;
 	}
 	else if((c = getclient(ev->window))) {
 		focus(c);
-		if(CLEANMASK(ev->state) != MODKEY)
-			return;
-		if(ev->button == Button1) {
-			restack();
-			movemouse(c);
-		}
-		else if(ev->button == Button2) {
-			if((floating != m->layout->arrange) && c->isfloating)
-				togglefloating(NULL);
-			else
-				zoom(NULL);
-		}
-		else if(ev->button == Button3 && !c->isfixed) {
-			restack();
-			resizemouse(c);
-		}
+		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) {
 	otherwm = False;
-	XSetErrorHandler(xerrorstart);
+	xerrorxlib = XSetErrorHandler(xerrorstart);
 
 	/* this causes an error if some other window manager is running */
 	XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 	XSync(dpy, False);
 	if(otherwm)
-		eprint("dwm: another window manager is already running\n");
-	XSync(dpy, False);
-	XSetErrorHandler(NULL);
-	xerrorxlib = XSetErrorHandler(xerror);
+		die("dwm: another window manager is already running\n");
+	XSetErrorHandler(xerror);
 	XSync(dpy, False);
 }
 
 void
 cleanup(void) {
-	unsigned int i;
-	close(STDIN_FILENO);
-	while(stack) {
-		unban(stack);
-		unmanage(stack);
-	}
-	for(i = 0; i < mcount; i++) {
-		Monitor *m = &monitors[i];
-		if(m->dc.font.set)
-			XFreeFontSet(dpy, m->dc.font.set);
-		else
-			XFreeFont(dpy, m->dc.font.xfont);
-		XUngrabKey(dpy, AnyKey, AnyModifier, m->root);
-		XFreePixmap(dpy, m->dc.drawable);
-		XFreeGC(dpy, m->dc.gc);
-		XDestroyWindow(dpy, m->barwin);
-		XFreeCursor(dpy, cursor[CurNormal]);
-		XFreeCursor(dpy, cursor[CurResize]);
-		XFreeCursor(dpy, cursor[CurMove]);
-		XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
-		XSync(dpy, False);
+	Arg a = {.ui = ~0};
+	Layout foo = { "", NULL };
+	Monitor *m;
+
+	view(&a);
+	lt[selmon->sellt] = &foo;
+
+	/* TODO: consider simplifying cleanup code of the stack, perhaps do that in cleanmons() ? */
+	for(m = mons; m; m = m->next)
+		while(m->stack)
+			unmanage(m->stack);
+	if(dc.font.set)
+		XFreeFontSet(dpy, dc.font.set);
+	else
+		XFreeFont(dpy, dc.font.xfont);
+	XUngrabKey(dpy, AnyKey, AnyModifier, root);
+	XFreePixmap(dpy, dc.drawable);
+	XFreeGC(dpy, dc.gc);
+	XFreeCursor(dpy, cursor[CurNormal]);
+	XFreeCursor(dpy, cursor[CurResize]);
+	XFreeCursor(dpy, cursor[CurMove]);
+	cleanupmons();
+	XSync(dpy, False);
+	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
+}
+
+void
+cleanupmons(void) {
+	Monitor *m;
+
+	while(mons) {
+		m = mons->next;
+		XUnmapWindow(dpy, mons->barwin);
+		XDestroyWindow(dpy, mons->barwin);
+		free(mons);
+		mons = m;
 	}
 }
 
 void
-compileregs(void) {
-	unsigned int i;
-	regex_t *reg;
+clearurgent(Client *c) {
+	XWMHints *wmh;
 
-	if(regs)
+	c->isurgent = False;
+	if(!(wmh = XGetWMHints(dpy, c->win)))
 		return;
-	regs = emallocz(LENGTH(rules) * sizeof(Regs));
-	for(i = 0; i < LENGTH(rules); i++) {
-		if(rules[i].prop) {
-			reg = emallocz(sizeof(regex_t));
-			if(regcomp(reg, rules[i].prop, REG_EXTENDED))
-				free(reg);
-			else
-				regs[i].propregex = reg;
-		}
-		if(rules[i].tags) {
-			reg = emallocz(sizeof(regex_t));
-			if(regcomp(reg, rules[i].tags, REG_EXTENDED))
-				free(reg);
-			else
-				regs[i].tagregex = reg;
-		}
-	}
+	wmh->flags &= ~XUrgencyHint;
+	XSetWMHints(dpy, c->win, wmh);
+	XFree(wmh);
 }
 
 void
@@ -464,7 +513,7 @@ configure(Client *c) {
 	ce.y = c->y;
 	ce.width = c->w;
 	ce.height = c->h;
-	ce.border_width = c->border;
+	ce.border_width = c->bw;
 	ce.above = None;
 	ce.override_redirect = False;
 	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
@@ -472,16 +521,19 @@ configure(Client *c) {
 
 void
 configurenotify(XEvent *e) {
+	Monitor *m;
 	XConfigureEvent *ev = &e->xconfigure;
-	Monitor *m = &monitors[selmonitor];
-
-	if(ev->window == m->root && (ev->width != m->sw || ev->height != m->sh)) {
-		m->sw = ev->width;
-		m->sh = ev->height;
-		XFreePixmap(dpy, dc.drawable);
-		dc.drawable = XCreatePixmap(dpy, m->root, m->sw, bh, DefaultDepth(dpy, m->screen));
-		XResizeWindow(dpy, m->barwin, m->sw, bh);
-		updatebarpos(m);
+
+	if(ev->window == root && (ev->width != sw || ev->height != sh)) {
+		sw = ev->width;
+		sh = ev->height;
+		updategeom();
+		if(dc.drawable != 0)
+			XFreePixmap(dpy, dc.drawable);
+		dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
+		updatebars();
+		for(m = mons; m; m = m->next)
+			XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 		arrange();
 	}
 }
@@ -493,26 +545,24 @@ configurerequest(XEvent *e) {
 	XWindowChanges wc;
 
 	if((c = getclient(ev->window))) {
-		Monitor *m = &monitors[c->monitor];
 		if(ev->value_mask & CWBorderWidth)
-			c->border = ev->border_width;
-		if(c->isfixed || c->isfloating || (floating == m->layout->arrange)) {
+			c->bw = ev->border_width;
+		else if(c->isfloating || !lt[selmon->sellt]->arrange) {
 			if(ev->value_mask & CWX)
-				c->x = m->sx+ev->x;
+				c->x = sx + ev->x;
 			if(ev->value_mask & CWY)
-				c->y = m->sy+ev->y;
+				c->y = sy + ev->y;
 			if(ev->value_mask & CWWidth)
 				c->w = ev->width;
 			if(ev->value_mask & CWHeight)
 				c->h = ev->height;
-			if((c->x - m->sx + c->w) > m->sw && c->isfloating)
-				c->x = m->sx + (m->sw / 2 - c->w / 2); /* center in x direction */
-			if((c->y - m->sy + c->h) > m->sh && c->isfloating)
-				c->y = m->sy + (m->sh / 2 - c->h / 2); /* center in y direction */
-			if((ev->value_mask & (CWX | CWY))
-			&& !(ev->value_mask & (CWWidth | CWHeight)))
+			if((c->x - sx + c->w) > sw && c->isfloating)
+				c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
+			if((c->y - sy + c->h) > sh && c->isfloating)
+				c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
+			if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 				configure(c);
-			if(isvisible(c, monitorat()))
+			if(ISVISIBLE(c))
 				XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 		}
 		else
@@ -542,134 +592,151 @@ destroynotify(XEvent *e) {
 
 void
 detach(Client *c) {
-	if(c->prev)
-		c->prev->next = c->next;
-	if(c->next)
-		c->next->prev = c->prev;
-	if(c == clients)
-		clients = c->next;
-	c->next = c->prev = NULL;
+	Client **tc;
+
+	for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
+	*tc = c->next;
 }
 
 void
 detachstack(Client *c) {
 	Client **tc;
 
-	for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
+	for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
 	*tc = c->snext;
 }
 
 void
-drawbar(void) {
-	int i, j, x;
+die(const char *errstr, ...) {
+	va_list ap;
 
-	for(i = 0; i < mcount; i++) {
-		Monitor *m = &monitors[i];
-		m->dc.x = 0;
-		for(j = 0; j < LENGTH(tags); j++) {
-			m->dc.w = textw(m, tags[j]);
-			if(m->seltags[j]) {
-				drawtext(m, tags[j], m->dc.sel, isurgent(i, j));
-				drawsquare(m, sel && sel->tags[j] && sel->monitor == selmonitor, isoccupied(m, j), m->dc.sel);
-			}
-			else {
-				drawtext(m, tags[j], m->dc.norm, isurgent(i, j));
-				drawsquare(m, sel && sel->tags[j] && sel->monitor == selmonitor, isoccupied(m, j), m->dc.norm);
-			}
-			m->dc.x += m->dc.w;
-		}
-		m->dc.w = blw;
-		drawtext(m, m->layout->symbol, m->dc.norm, False);
-		x = m->dc.x + m->dc.w;
-		m->dc.w = textw(m, stext);
-		m->dc.x = m->sw - m->dc.w;
-		if(m->dc.x < x) {
-			m->dc.x = x;
-			m->dc.w = m->sw - x;
+	va_start(ap, errstr);
+	vfprintf(stderr, errstr, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
+
+void
+drawbar(Monitor *m) {
+	int x;
+	unsigned int i, occ = 0, urg = 0;
+	unsigned long *col;
+	Client *c;
+
+	for(c = m->clients; c; c = c->next) {
+		occ |= c->tags;
+		if(c->isurgent)
+			urg |= c->tags;
+	}
+
+	dc.x = 0;
+#ifdef XINERAMA
+	{
+		char buf[2];
+		buf[0] = m->screen_number + '0';
+		buf[1] = '\0';
+		dc.w = TEXTW(buf);
+		drawtext(buf, selmon == m ? dc.sel : dc.norm, True);
+		dc.x += dc.w;
+	}
+#endif /* XINERAMA */
+	m->btx = dc.x;
+	for(i = 0; i < LENGTH(tags); i++) {
+		dc.w = TEXTW(tags[i]);
+		col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
+		drawtext(tags[i], col, urg & 1 << i);
+		drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
+		           occ & 1 << i, urg & 1 << i, col);
+		dc.x += dc.w;
+	}
+	if(blw > 0) {
+		dc.w = blw;
+		drawtext(lt[m->sellt]->symbol, dc.norm, False);
+		x = dc.x + dc.w;
+	}
+	else
+		x = dc.x;
+	if(m == selmon) { /* status is only drawn on selected monitor */
+		dc.w = TEXTW(stext);
+		dc.x = m->ww - dc.w;
+		if(dc.x < x) {
+			dc.x = x;
+			dc.w = m->ww - x;
 		}
-		drawtext(m, stext, m->dc.norm, False);
-		if((m->dc.w = m->dc.x - x) > bh) {
-			m->dc.x = x;
-			if(sel && sel->monitor == selmonitor) {
-				drawtext(m, sel->name, m->dc.sel, False);
-				drawsquare(m, False, sel->isfloating, m->dc.sel);
-			}
-			else
-				drawtext(m, NULL, m->dc.norm, False);
+		drawtext(stext, dc.norm, False);
+	}
+	else {
+		dc.x = m->ww;
+	}
+	if((dc.w = dc.x - x) > bh) {
+		dc.x = x;
+		if(m->sel) {
+			col = m == selmon ? dc.sel : dc.norm;
+			drawtext(m->sel->name, col, False);
+			drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
 		}
-		XCopyArea(dpy, m->dc.drawable, m->barwin, m->dc.gc, 0, 0, m->sw, bh, 0, 0);
-		XSync(dpy, False);
+		else
+			drawtext(NULL, dc.norm, False);
 	}
+	XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
+	XSync(dpy, False);
+}
+
+void
+drawbars() {
+	Monitor *m;
+
+	for(m = mons; m; m = m->next)
+		drawbar(m);
 }
 
 void
-drawsquare(Monitor *m, Bool filled, Bool empty, unsigned long col[ColLast]) {
+drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
 	int x;
 	XGCValues gcv;
-	XRectangle r = { m->dc.x, m->dc.y, m->dc.w, m->dc.h };
+	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 
-	gcv.foreground = col[ColFG];
-	XChangeGC(dpy, m->dc.gc, GCForeground, &gcv);
-	x = (m->dc.font.ascent + m->dc.font.descent + 2) / 4;
-	r.x = m->dc.x + 1;
-	r.y = m->dc.y + 1;
+	gcv.foreground = col[invert ? ColBG : ColFG];
+	XChangeGC(dpy, dc.gc, GCForeground, &gcv);
+	x = (dc.font.ascent + dc.font.descent + 2) / 4;
+	r.x = dc.x + 1;
+	r.y = dc.y + 1;
 	if(filled) {
 		r.width = r.height = x + 1;
-		XFillRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
+		XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 	}
 	else if(empty) {
 		r.width = r.height = x;
-		XDrawRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
+		XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 	}
 }
 
 void
-drawtext(Monitor *m, const char *text, unsigned long col[ColLast], Bool invert) {
-	int x, y, w, h;
-	static char buf[256];
-	unsigned int len, olen;
-	XRectangle r = { m->dc.x, m->dc.y, m->dc.w, m->dc.h };
+drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
+	char buf[256];
+	int i, x, y, h, len, olen;
+	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 
-	XSetForeground(dpy, m->dc.gc, col[invert ? ColFG : ColBG]);
-	XFillRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
+	XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
+	XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 	if(!text)
 		return;
-	w = 0;
-	olen = len = strlen(text);
-	if(len >= sizeof buf)
-		len = sizeof buf - 1;
-	memcpy(buf, text, len);
-	buf[len] = 0;
-	h = m->dc.font.ascent + m->dc.font.descent;
-	y = m->dc.y + (m->dc.h / 2) - (h / 2) + m->dc.font.ascent;
-	x = m->dc.x + (h / 2);
+	olen = strlen(text);
+	h = dc.font.ascent + dc.font.descent;
+	y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
+	x = dc.x + (h / 2);
 	/* shorten text if necessary */
-	while(len && (w = textnw(m, buf, len)) > m->dc.w - h)
-		buf[--len] = 0;
-	if(len < olen) {
-		if(len > 1)
-			buf[len - 1] = '.';
-		if(len > 2)
-			buf[len - 2] = '.';
-		if(len > 3)
-			buf[len - 3] = '.';
-	}
-	if(w > m->dc.w)
-		return; /* too long */
-	XSetForeground(dpy, m->dc.gc, col[invert ? ColBG : ColFG]);
-	if(m->dc.font.set)
-		XmbDrawString(dpy, m->dc.drawable, m->dc.font.set, m->dc.gc, x, y, buf, len);
+	for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
+	if(!len)
+		return;
+	memcpy(buf, text, len);
+	if(len < olen)
+		for(i = len; i && i > len - 3; buf[--i] = '.');
+	XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
+	if(dc.font.set)
+		XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
 	else
-		XDrawString(dpy, m->dc.drawable, m->dc.gc, x, y, buf, len);
-}
-
-void *
-emallocz(unsigned int size) {
-	void *res = calloc(1, size);
-
-	if(!res)
-		eprint("fatal: could not malloc() %u bytes\n", size);
-	return res;
+		XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
 }
 
 void
@@ -677,132 +744,124 @@ enternotify(XEvent *e) {
 	Client *c;
 	XCrossingEvent *ev = &e->xcrossing;
 
-	if(ev->mode != NotifyNormal || ev->detail == NotifyInferior);
-		//return;
+	if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
+		return;
 	if((c = getclient(ev->window)))
 		focus(c);
-	else {
-		selmonitor = monitorat();
-		fprintf(stderr, "updating selmonitor %d\n", selmonitor);
+	else
 		focus(NULL);
-	}
-}
-
-void
-eprint(const char *errstr, ...) {
-	va_list ap;
-
-	va_start(ap, errstr);
-	vfprintf(stderr, errstr, ap);
-	va_end(ap);
-	exit(EXIT_FAILURE);
 }
 
 void
 expose(XEvent *e) {
+	Monitor *m;
 	XExposeEvent *ev = &e->xexpose;
 
-	if(ev->count == 0) {
-		if(ev->window == monitors[selmonitor].barwin)
-			drawbar();
-	}
-}
-
-void
-floating(void) { /* default floating layout */
-	Client *c;
-
-	domwfact = dozoom = False;
-	for(c = clients; c; c = c->next)
-		if(isvisible(c, selmonitor))
-			resize(c, c->x, c->y, c->w, c->h, True);
+	if(ev->count == 0)
+		for(m = mons; m; m = m->next)
+			if(ev->window == m->barwin) {
+				drawbar(m);
+				break;
+			}
 }
 
 void
 focus(Client *c) {
-	Monitor *m;
-
-	if(c)
-		selmonitor = c->monitor;
-	m = &monitors[selmonitor];
-	if(!c || (c && !isvisible(c, selmonitor)))
-		for(c = stack; c && !isvisible(c, c->monitor); c = c->snext);
-	if(sel && sel != c) {
-		grabbuttons(sel, False);
-		XSetWindowBorder(dpy, sel->win, monitors[sel->monitor].dc.norm[ColBorder]);
-	}
+	if(!c || !ISVISIBLE(c))
+		for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
+	if(selmon->sel)
+		unfocus(selmon->sel);
 	if(c) {
+		if(c->mon != selmon)
+			selmon = c->mon;
+		if(c->isurgent)
+			clearurgent(c);
 		detachstack(c);
 		attachstack(c);
 		grabbuttons(c, True);
-	}
-	sel = c;
-	drawbar();
-	if(c) {
-		XSetWindowBorder(dpy, c->win, m->dc.sel[ColBorder]);
+		XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
-		selmonitor = c->monitor;
-	}
-	else {
-		XSetInputFocus(dpy, m->root, RevertToPointerRoot, CurrentTime);
 	}
+	else
+		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
+	selmon->sel = c;
+	drawbars();
 }
 
 void
 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
 	XFocusChangeEvent *ev = &e->xfocus;
 
-	if(sel && ev->window != sel->win)
-		XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
+	if(selmon->sel && ev->window != selmon->sel->win)
+		XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
 }
 
+#ifdef XINERAMA
 void
-focusnext(const char *arg) {
-	Client *c;
+focusmon(const Arg *arg) {
+	unsigned int i;
+	Monitor *m; 
 
-	if(!sel)
-		return;
-	for(c = sel->next; c && !isvisible(c, selmonitor); c = c->next);
-	if(!c)
-		for(c = clients; c && !isvisible(c, selmonitor); c = c->next);
-	if(c) {
-		focus(c);
-		restack();
-	}
+	for(i = 0, m = mons; m; m = m->next, i++)
+		if(i == arg->ui) {
+			if(m->stack)
+				focus(m->stack);
+			else {
+				unfocus(selmon->stack);
+				selmon = m;
+				focus(NULL);
+			}
+			drawbars();
+			break;
+		}
 }
+#endif /* XINERAMA */
 
 void
-focusprev(const char *arg) {
-	Client *c;
+focusstack(const Arg *arg) {
+	Client *c = NULL, *i;
 
-	if(!sel)
+	if(!selmon->sel)
 		return;
-	for(c = sel->prev; c && !isvisible(c, selmonitor); c = c->prev);
-	if(!c) {
-		for(c = clients; c && c->next; c = c->next);
-		for(; c && !isvisible(c, selmonitor); c = c->prev);
+	if(arg->i > 0) {
+		for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
+		if(!c)
+			for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
+	}
+	else {
+		for(i = selmon->clients; i != selmon->sel; i = i->next)
+			if(ISVISIBLE(i))
+				c = i;
+		if(!c)
+			for(; i; i = i->next)
+				if(ISVISIBLE(i))
+					c = i;
 	}
 	if(c) {
 		focus(c);
-		restack();
+		restack(selmon);
 	}
 }
 
 Client *
 getclient(Window w) {
 	Client *c;
+	Monitor *m;
 
-	for(c = clients; c && c->win != w; c = c->next);
-	return c;
+	for(m = mons; m; m = m->next)
+		for(c = m->clients; c; c = c->next)
+			if(c->win == w)
+				return c;
+	return NULL;
 }
 
 unsigned long
-getcolor(const char *colstr, int screen) {
+getcolor(const char *colstr) {
 	Colormap cmap = DefaultColormap(dpy, screen);
 	XColor color;
 
 	if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
-		eprint("error, cannot allocate color '%s'\n", colstr);
+		die("error, cannot allocate color '%s'\n", colstr);
 	return color.pixel;
 }
 
@@ -852,131 +911,76 @@ gettextprop(Window w, Atom atom, char *text, unsigned int size) {
 
 void
 grabbuttons(Client *c, Bool focused) {
-	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
-
-	if(focused) {
-		XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-		XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-		XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-		XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-
-		XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-		XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-		XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-		XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-
-		XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-		XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-		XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-		XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
+	updatenumlockmask();
+	{
+		unsigned int i, j;
+		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
+		XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
+		if(focused) {
+			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);
+		} else
+			XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
+			            BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
 	}
-	else
-		XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
 }
 
 void
-grabkeys(void)  {
-	unsigned int i, j;
-	KeyCode code;
-	XModifierKeymap *modmap;
-
-	/* init modifier map */
-	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);
+grabkeys(void) {
+	updatenumlockmask();
+	{ /* grab keys */
+		unsigned int i, j;
+		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
+		KeyCode code;
 
-	for(i = 0; i < mcount; i++) {
-		Monitor *m = &monitors[i];
-		XUngrabKey(dpy, AnyKey, AnyModifier, m->root);
-		for(j = 0; j < LENGTH(keys); j++) {
-			code = XKeysymToKeycode(dpy, keys[j].keysym);
-			XGrabKey(dpy, code, keys[j].mod, m->root, True,
-					GrabModeAsync, GrabModeAsync);
-			XGrabKey(dpy, code, keys[j].mod | LockMask, m->root, True,
-					GrabModeAsync, GrabModeAsync);
-			XGrabKey(dpy, code, keys[j].mod | numlockmask, m->root, True,
-					GrabModeAsync, GrabModeAsync);
-			XGrabKey(dpy, code, keys[j].mod | numlockmask | LockMask, m->root, True,
-					GrabModeAsync, GrabModeAsync);
+		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);
 		}
 	}
 }
 
-unsigned int
-idxoftag(const char *tag) {
-	unsigned int i;
-
-	for(i = 0; (i < LENGTH(tags)) && (tags[i] != tag); i++);
-	return (i < LENGTH(tags)) ? i : 0;
-}
-
 void
-initfont(Monitor *m, const char *fontstr) {
+initfont(const char *fontstr) {
 	char *def, **missing;
 	int i, n;
 
 	missing = NULL;
-	if(m->dc.font.set)
-		XFreeFontSet(dpy, m->dc.font.set);
-	m->dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
+	dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 	if(missing) {
 		while(n--)
 			fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
 		XFreeStringList(missing);
 	}
-	if(m->dc.font.set) {
+	if(dc.font.set) {
 		XFontSetExtents *font_extents;
 		XFontStruct **xfonts;
 		char **font_names;
-		m->dc.font.ascent = m->dc.font.descent = 0;
-		font_extents = XExtentsOfFontSet(m->dc.font.set);
-		n = XFontsOfFontSet(m->dc.font.set, &xfonts, &font_names);
-		for(i = 0, m->dc.font.ascent = 0, m->dc.font.descent = 0; i < n; i++) {
-			if(m->dc.font.ascent < (*xfonts)->ascent)
-				m->dc.font.ascent = (*xfonts)->ascent;
-			if(m->dc.font.descent < (*xfonts)->descent)
-				m->dc.font.descent = (*xfonts)->descent;
+		dc.font.ascent = dc.font.descent = 0;
+		font_extents = XExtentsOfFontSet(dc.font.set);
+		n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
+		for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
+			dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
+			dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
 			xfonts++;
 		}
 	}
 	else {
-		if(m->dc.font.xfont)
-			XFreeFont(dpy, m->dc.font.xfont);
-		m->dc.font.xfont = NULL;
-		if(!(m->dc.font.xfont = XLoadQueryFont(dpy, fontstr))
-		&& !(m->dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
-			eprint("error, cannot load font: '%s'\n", fontstr);
-		m->dc.font.ascent = m->dc.font.xfont->ascent;
-		m->dc.font.descent = m->dc.font.xfont->descent;
+		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
+		&& !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
+			die("error, cannot load font: '%s'\n", fontstr);
+		dc.font.ascent = dc.font.xfont->ascent;
+		dc.font.descent = dc.font.xfont->descent;
 	}
-	m->dc.font.height = m->dc.font.ascent + m->dc.font.descent;
-}
-
-Bool
-isoccupied(Monitor *m, unsigned int t) {
-	Client *c;
-
-	for(c = clients; c; c = c->next)
-		if(c->tags[t] && c->monitor == selmonitor)
-			return True;
-	return False;
+	dc.font.height = dc.font.ascent + dc.font.descent;
 }
 
 Bool
@@ -994,26 +998,6 @@ isprotodel(Client *c) {
 	return ret;
 }
 
-Bool
-isurgent(int monitor, unsigned int t) {
-	Client *c;
-
-	for(c = clients; c; c = c->next)
-		if(c->monitor == monitor && c->isurgent && c->tags[t])
-			return True;
-	return False;
-}
-
-Bool
-isvisible(Client *c, int monitor) {
-	unsigned int i;
-
-	for(i = 0; i < LENGTH(tags); i++)
-		if(c->tags[i] && monitors[c->monitor].seltags[i] && c->monitor == monitor)
-			return True;
-	return False;
-}
-
 void
 keypress(XEvent *e) {
 	unsigned int i;
@@ -1024,88 +1008,87 @@ keypress(XEvent *e) {
 	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))
-		{
-			if(keys[i].func)
-				keys[i].func(keys[i].arg);
-		}
+		   && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
+		   && keys[i].func)
+			keys[i].func(&(keys[i].arg));
 }
 
 void
-killclient(const char *arg) {
+killclient(const Arg *arg) {
 	XEvent ev;
 
-	if(!sel)
+	if(!selmon->sel)
 		return;
-	if(isprotodel(sel)) {
+	if(isprotodel(selmon->sel)) {
 		ev.type = ClientMessage;
-		ev.xclient.window = sel->win;
+		ev.xclient.window = selmon->sel->win;
 		ev.xclient.message_type = wmatom[WMProtocols];
 		ev.xclient.format = 32;
 		ev.xclient.data.l[0] = wmatom[WMDelete];
 		ev.xclient.data.l[1] = CurrentTime;
-		XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
+		XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
 	}
 	else
-		XKillClient(dpy, sel->win);
+		XKillClient(dpy, selmon->sel->win);
 }
 
 void
 manage(Window w, XWindowAttributes *wa) {
+	static Client cz;
 	Client *c, *t = NULL;
-	Monitor *m;
-	Status rettrans;
-	Window trans;
+	Window trans = None;
 	XWindowChanges wc;
 
-	c = emallocz(sizeof(Client));
-	c->tags = emallocz(sizeof initags);
+	if(!(c = malloc(sizeof(Client))))
+		die("fatal: could not malloc() %u bytes\n", sizeof(Client));
+	*c = cz;
 	c->win = w;
+	c->mon = selmon;
 
-	applyrules(c);
-
-	m = &monitors[c->monitor];
-
-	c->x = wa->x + m->sx;
-	c->y = wa->y + m->sy;
+	/* geometry */
+	c->x = wa->x;
+	c->y = wa->y;
 	c->w = wa->width;
 	c->h = wa->height;
-	c->oldborder = wa->border_width;
-
-	if(c->w == m->sw && c->h == m->sh) {
-		c->x = m->sx;
-		c->y = m->sy;
-		c->border = wa->border_width;
+	c->oldbw = wa->border_width;
+	if(c->w == sw && c->h == sh) {
+		c->x = sx;
+		c->y = sy;
+		c->bw = 0;
 	}
 	else {
-		if(c->x + c->w + 2 * c->border > m->wax + m->waw)
-			c->x = m->wax + m->waw - c->w - 2 * c->border;
-		if(c->y + c->h + 2 * c->border > m->way + m->wah)
-			c->y = m->way + m->wah - c->h - 2 * c->border;
-		if(c->x < m->wax)
-			c->x = m->wax;
-		if(c->y < m->way)
-			c->y = m->way;
-		c->border = BORDERPX;
-	}
-	wc.border_width = c->border;
+		if(c->x + WIDTH(c) > sx + sw)
+			c->x = sx + sw - WIDTH(c);
+		if(c->y + HEIGHT(c) > sy + sh)
+			c->y = sy + sh - HEIGHT(c);
+		c->x = MAX(c->x, sx);
+		/* only fix client y-offset, if the client center might cover the bar */
+		c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
+		           && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : sy);
+		c->bw = borderpx;
+	}
+
+	wc.border_width = c->bw;
 	XConfigureWindow(dpy, w, CWBorderWidth, &wc);
-	XSetWindowBorder(dpy, w, m->dc.norm[ColBorder]);
+	XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 	configure(c); /* propagates border_width, if size doesn't change */
 	updatesizehints(c);
-	XSelectInput(dpy, w, EnterWindowMask | FocusChangeMask | PropertyChangeMask | StructureNotifyMask);
+	XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
 	grabbuttons(c, False);
 	updatetitle(c);
-	if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
-		for(t = clients; t && t->win != trans; t = t->next);
+	if(XGetTransientForHint(dpy, w, &trans))
+		t = getclient(trans);
 	if(t)
-		memcpy(c->tags, t->tags, sizeof initags);
+		c->tags = t->tags;
+	else
+		applyrules(c);
 	if(!c->isfloating)
-		c->isfloating = (rettrans == Success) || c->isfixed;
+		c->isfloating = trans != None || c->isfixed;
+	if(c->isfloating)
+		XRaiseWindow(dpy, c->win);
 	attach(c);
 	attachstack(c);
-	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
-	ban(c);
+	XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
 	XMapWindow(dpy, c->win);
 	setclientstate(c, NormalState);
 	arrange();
@@ -1133,75 +1116,68 @@ maprequest(XEvent *e) {
 		manage(ev->window, &wa);
 }
 
-int
-monitorat() {
-	int i, x, y;
-	Window win;
-	unsigned int mask;
+void
+monocle(Monitor *m) {
+	Client *c;
 
-	XQueryPointer(dpy, monitors[selmonitor].root, &win, &win, &x, &y, &i, &i, &mask);
-	for(i = 0; i < mcount; i++) {
-		fprintf(stderr, "checking monitor[%d]: %d %d %d %d\n", i, monitors[i].sx, monitors[i].sy, monitors[i].sw, monitors[i].sh);
-		if((x >= monitors[i].sx && x < monitors[i].sx + monitors[i].sw)
-		&& (y >= monitors[i].sy && y < monitors[i].sy + monitors[i].sh)) {
-			fprintf(stderr, "%d,%d -> %d\n", x, y, i);
-			return i;
-		}
-	}
-	fprintf(stderr, "?,? -> 0\n");
-	return 0;
+	for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
+		resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw);
 }
 
 void
-movemouse(Client *c) {
-	int x1, y1, ocx, ocy, di, nx, ny;
+movemouse(const Arg *arg) {
+	int x, y, ocx, ocy, di, nx, ny;
 	unsigned int dui;
+	Client *c;
 	Window dummy;
 	XEvent ev;
 
-	ocx = nx = c->x;
-	ocy = ny = c->y;
-	if(XGrabPointer(dpy, monitors[selmonitor].root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
-			None, cursor[CurMove], CurrentTime) != GrabSuccess)
+	if(!(c = selmon->sel))
 		return;
-	XQueryPointer(dpy, monitors[selmonitor].root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
-	for(;;) {
-		XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
+	restack(selmon);
+	ocx = c->x;
+	ocy = c->y;
+	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
+	None, cursor[CurMove], CurrentTime) != GrabSuccess)
+		return;
+	XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
+	do {
+		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
 		switch (ev.type) {
-		case ButtonRelease:
-			XUngrabPointer(dpy, CurrentTime);
-			return;
 		case ConfigureRequest:
 		case Expose:
 		case MapRequest:
 			handler[ev.type](&ev);
 			break;
 		case MotionNotify:
-			XSync(dpy, False);
-			nx = ocx + (ev.xmotion.x - x1);
-			ny = ocy + (ev.xmotion.y - y1);
-			Monitor *m = &monitors[monitorat()];
-			if(abs(m->wax - nx) < SNAP)
-				nx = m->wax;
-			else if(abs((m->wax + m->waw) - (nx + c->w + 2 * c->border)) < SNAP)
-				nx = m->wax + m->waw - c->w - 2 * c->border;
-			if(abs(m->way - ny) < SNAP)
-				ny = m->way;
-			else if(abs((m->way + m->wah) - (ny + c->h + 2 * c->border)) < SNAP)
-				ny = m->way + m->wah - c->h - 2 * c->border;
-			if((monitors[selmonitor].layout->arrange != floating) && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
-				togglefloating(NULL);
-			if((monitors[selmonitor].layout->arrange == floating) || c->isfloating)
-				resize(c, nx, ny, c->w, c->h, False);
-			memcpy(c->tags, monitors[monitorat()].seltags, sizeof initags);
+			nx = ocx + (ev.xmotion.x - x);
+			ny = ocy + (ev.xmotion.y - y);
+			if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
+			        && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
+				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 && lt[selmon->sellt]->arrange
+				                  && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
+					togglefloating(NULL);
+			}
+			if(!lt[selmon->sellt]->arrange || c->isfloating)
+				resize(c, nx, ny, c->w, c->h);
 			break;
 		}
 	}
+	while(ev.type != ButtonRelease);
+	XUngrabPointer(dpy, CurrentTime);
 }
 
 Client *
-nexttiled(Client *c, int monitor) {
-	for(; c && (c->isfloating || !isvisible(c, monitor)); c = c->next);
+nexttiled(Client *c) {
+	for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
 	return c;
 }
 
@@ -1211,186 +1187,119 @@ propertynotify(XEvent *e) {
 	Window trans;
 	XPropertyEvent *ev = &e->xproperty;
 
-	if(ev->state == PropertyDelete)
+	if((ev->window == root) && (ev->atom == XA_WM_NAME))
+		updatestatus();
+	else if(ev->state == PropertyDelete)
 		return; /* ignore */
-	if((c = getclient(ev->window))) {
+	else if((c = getclient(ev->window))) {
 		switch (ev->atom) {
-			default: break;
-			case XA_WM_TRANSIENT_FOR:
-				XGetTransientForHint(dpy, c->win, &trans);
-				if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
-					arrange();
-				break;
-			case XA_WM_NORMAL_HINTS:
-				updatesizehints(c);
-				break;
-			case XA_WM_HINTS:
-				updatewmhints(c);
-				drawbar();
-				break;
+		default: break;
+		case XA_WM_TRANSIENT_FOR:
+			XGetTransientForHint(dpy, c->win, &trans);
+			if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
+				arrange();
+			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 == sel)
-				drawbar();
+			if(c == selmon->sel)
+				drawbars();
 		}
 	}
 }
 
 void
-quit(const char *arg) {
-	readin = running = False;
+quit(const Arg *arg) {
+	running = False;
 }
 
 void
-reapply(const char *arg) {
-	static Bool zerotags[LENGTH(tags)] = { 0 };
-	Client *c;
-
-	for(c = clients; c; c = c->next) {
-		memcpy(c->tags, zerotags, sizeof zerotags);
-		applyrules(c);
-	}
-	arrange();
-}
-
-void
-resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
+resize(Client *c, int x, int y, int w, int h) {
 	XWindowChanges wc;
-	//Monitor scr = monitors[monitorat()];
-//	c->monitor = monitorat();
-
-	if(sizehints) {
-		/* set minimum possible */
-		if (w < 1)
-			w = 1;
-		if (h < 1)
-			h = 1;
-
-		/* temporarily remove base dimensions */
-		w -= c->basew;
-		h -= c->baseh;
-
-		/* adjust for aspect limits */
-		if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
-			if (w * c->maxay > h * c->maxax)
-				w = h * c->maxax / c->maxay;
-			else if (w * c->minay < h * c->minax)
-				h = w * c->minay / c->minax;
-		}
-
-		/* adjust for increment value */
-		if(c->incw)
-			w -= w % c->incw;
-		if(c->inch)
-			h -= h % c->inch;
 
-		/* restore base dimensions */
-		w += c->basew;
-		h += c->baseh;
-
-		if(c->minw > 0 && w < c->minw)
-			w = c->minw;
-		if(c->minh > 0 && h < c->minh)
-			h = c->minh;
-		if(c->maxw > 0 && w > c->maxw)
-			w = c->maxw;
-		if(c->maxh > 0 && h > c->maxh)
-			h = c->maxh;
-	}
-	if(w <= 0 || h <= 0)
-		return;
-	/* TODO: offscreen appearance fixes */
-	/*
-	if(x > scr.sw)
-		x = scr.sw - w - 2 * c->border;
-	if(y > scr.sh)
-		y = scr.sh - h - 2 * c->border;
-	if(x + w + 2 * c->border < scr.sx)
-		x = scr.sx;
-	if(y + h + 2 * c->border < scr.sy)
-		y = scr.sy;
-	*/
-	if(c->x != x || c->y != y || c->w != w || c->h != h) {
+	if(applysizehints(c, &x, &y, &w, &h)) {
 		c->x = wc.x = x;
 		c->y = wc.y = y;
 		c->w = wc.width = w;
 		c->h = wc.height = h;
-		wc.border_width = c->border;
-		XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
+		wc.border_width = c->bw;
+		XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
 		configure(c);
 		XSync(dpy, False);
 	}
 }
 
 void
-resizemouse(Client *c) {
+resizemouse(const Arg *arg) {
 	int ocx, ocy;
 	int nw, nh;
+	Client *c;
 	XEvent ev;
 
+	if(!(c = selmon->sel))
+		return;
+	restack(selmon);
 	ocx = c->x;
 	ocy = c->y;
-	if(XGrabPointer(dpy, monitors[selmonitor].root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
-			None, cursor[CurResize], CurrentTime) != GrabSuccess)
+	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
+	None, cursor[CurResize], CurrentTime) != GrabSuccess)
 		return;
-	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
-	for(;;) {
-		XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
+	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 ButtonRelease:
-			XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
-					c->w + c->border - 1, c->h + c->border - 1);
-			XUngrabPointer(dpy, CurrentTime);
-			while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
-			return;
 		case ConfigureRequest:
 		case Expose:
 		case MapRequest:
 			handler[ev.type](&ev);
 			break;
 		case MotionNotify:
-			XSync(dpy, False);
-			if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
-				nw = 1;
-			if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
-				nh = 1;
-			if((monitors[selmonitor].layout->arrange != floating) && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
-				togglefloating(NULL);
-			if((monitors[selmonitor].layout->arrange == floating) || c->isfloating)
-				resize(c, c->x, c->y, nw, nh, True);
+			nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
+			nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
+
+			if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
+			        && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
+				if(!c->isfloating && lt[selmon->sellt]->arrange
+				   && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
+					togglefloating(NULL);
+			}
+			if(!lt[selmon->sellt]->arrange || c->isfloating)
+				resize(c, c->x, c->y, nw, nh);
 			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));
 }
 
 void
-restack(void) {
-	unsigned int i;
+restack(Monitor *m) {
 	Client *c;
 	XEvent ev;
 	XWindowChanges wc;
 
-	drawbar();
-	if(!sel)
+	drawbars();
+	if(!m->sel)
 		return;
-	if(sel->isfloating || (monitors[selmonitor].layout->arrange == floating))
-		XRaiseWindow(dpy, sel->win);
-	if(monitors[selmonitor].layout->arrange != floating) {
+	if(m->sel->isfloating || !lt[m->sellt]->arrange)
+		XRaiseWindow(dpy, m->sel->win);
+	if(lt[m->sellt]->arrange) {
 		wc.stack_mode = Below;
-		wc.sibling = monitors[selmonitor].barwin;
-		if(!sel->isfloating) {
-			XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
-			wc.sibling = sel->win;
-		}
-		for(i = 0; i < mcount; i++) {
-			for(c = nexttiled(clients, i); c; c = nexttiled(c->next, i)) {
-				if(c == sel)
-					continue;
-				XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
+		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));
@@ -1398,88 +1307,36 @@ restack(void) {
 
 void
 run(void) {
-	char *p;
-	char buf[sizeof stext];
-	fd_set rd;
-	int r, xfd;
-	unsigned int len, offset;
 	XEvent ev;
 
-	/* main event loop, also reads status text from stdin */
+	/* main event loop */
 	XSync(dpy, False);
-	xfd = ConnectionNumber(dpy);
-	readin = True;
-	offset = 0;
-	len = sizeof stext - 1;
-	buf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
-	while(running) {
-		FD_ZERO(&rd);
-		if(readin)
-			FD_SET(STDIN_FILENO, &rd);
-		FD_SET(xfd, &rd);
-		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
-			if(errno == EINTR)
-				continue;
-			eprint("select failed\n");
-		}
-		if(FD_ISSET(STDIN_FILENO, &rd)) {
-			switch((r = read(STDIN_FILENO, buf + offset, len - offset))) {
-			case -1:
-				strncpy(stext, strerror(errno), len);
-				readin = False;
-				break;
-			case 0:
-				strncpy(stext, "EOF", 4);
-				readin = False;
-				break;
-			default:
-				for(p = buf + offset; r > 0; p++, r--, offset++)
-					if(*p == '\n' || *p == '\0') {
-						*p = '\0';
-						strncpy(stext, buf, len);
-						p += r - 1; /* p is buf + offset + r - 1 */
-						for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
-						offset = r;
-						if(r)
-							memmove(buf, p - r + 1, r);
-						break;
-					}
-				break;
-			}
-			drawbar();
-		}
-		while(XPending(dpy)) {
-			XNextEvent(dpy, &ev);
-			if(handler[ev.type])
-				(handler[ev.type])(&ev); /* call handler */
-		}
+	while(running && !XNextEvent(dpy, &ev)) {
+		if(handler[ev.type])
+			(handler[ev.type])(&ev); /* call handler */
 	}
 }
 
 void
 scan(void) {
-	unsigned int i, j, num;
-	Window *wins, d1, d2;
+	unsigned int i, num;
+	Window d1, d2, *wins = NULL;
 	XWindowAttributes wa;
 
-	for(i = 0; i < mcount; i++) {
-		Monitor *m = &monitors[i];
-		wins = NULL;
-		if(XQueryTree(dpy, m->root, &d1, &d2, &wins, &num)) {
-			for(j = 0; j < num; j++) {
-				if(!XGetWindowAttributes(dpy, wins[j], &wa)
-				|| wa.override_redirect || XGetTransientForHint(dpy, wins[j], &d1))
-					continue;
-				if(wa.map_state == IsViewable || getstate(wins[j]) == IconicState)
-					manage(wins[j], &wa);
-			}
-			for(j = 0; j < num; j++) { /* now the transients */
-				if(!XGetWindowAttributes(dpy, wins[j], &wa))
-					continue;
-				if(XGetTransientForHint(dpy, wins[j], &d1)
-				&& (wa.map_state == IsViewable || getstate(wins[j]) == IconicState))
-					manage(wins[j], &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);
@@ -1495,343 +1352,283 @@ setclientstate(Client *c, long state) {
 }
 
 void
-setlayout(const char *arg) {
-	unsigned int i;
-	Monitor *m = &monitors[monitorat()];
-
-	if(!arg) {
-		m->layout++;
-		if(m->layout == &layouts[LENGTH(layouts)])
-			m->layout = &layouts[0];
-	}
-	else {
-		for(i = 0; i < LENGTH(layouts); i++)
-			if(!strcmp(arg, layouts[i].symbol))
-				break;
-		if(i == LENGTH(layouts))
-			return;
-		m->layout = &layouts[i];
-	}
-	if(sel)
+setlayout(const Arg *arg) {
+	if(!arg || !arg->v || arg->v != lt[selmon->sellt])
+		selmon->sellt ^= 1;
+	if(arg && arg->v)
+		lt[selmon->sellt] = (Layout *)arg->v;
+	if(selmon->sel)
 		arrange();
 	else
-		drawbar();
+		drawbars();
 }
 
+/* arg > 1.0 will set mfact absolutly */
 void
-setmwfact(const char *arg) {
-	double delta;
-
-	Monitor *m = &monitors[monitorat()];
+setmfact(const Arg *arg) {
+	float f;
 
-	if(!domwfact)
+	if(!arg || !lt[selmon->sellt]->arrange)
 		return;
-	/* arg handling, manipulate mwfact */
-	if(arg == NULL)
-		m->mwfact = MWFACT;
-	else if(sscanf(arg, "%lf", &delta) == 1) {
-		if(arg[0] == '+' || arg[0] == '-')
-			m->mwfact += delta;
-		else
-			m->mwfact = delta;
-		if(m->mwfact < 0.1)
-			m->mwfact = 0.1;
-		else if(m->mwfact > 0.9)
-			m->mwfact = 0.9;
-	}
+	f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
+	if(f < 0.1 || f > 0.9)
+		return;
+	selmon->mfact = f;
 	arrange();
 }
 
 void
 setup(void) {
-	unsigned int i, j, k;
-	Monitor *m;
+	unsigned int i;
+	int w;
 	XSetWindowAttributes wa;
-	XineramaScreenInfo *info = NULL;
+
+	/* init screen */
+	screen = DefaultScreen(dpy);
+	root = RootWindow(dpy, screen);
+	initfont(font);
+	sx = 0;
+	sy = 0;
+	sw = DisplayWidth(dpy, screen);
+	sh = DisplayHeight(dpy, screen);
+	bh = dc.h = dc.font.height + 2;
+	lt[0] = &layouts[0];
+	lt[1] = &layouts[1 % LENGTH(layouts)];
+	updategeom();
 
 	/* init atoms */
 	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
 	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
-	wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
 	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
 	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 
 	/* init cursors */
-	wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
+	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
 	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
 	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
 
-	// init screens/monitors first
-	mcount = 1;
-	if((isxinerama = XineramaIsActive(dpy)))
-		info = XineramaQueryScreens(dpy, &mcount);
-	monitors = emallocz(mcount * sizeof(Monitor));
-
-	for(i = 0; i < mcount; i++) {
-		/* init geometry */
-		m = &monitors[i];
-
-		m->screen = isxinerama ? 0 : i;
-		m->root = RootWindow(dpy, m->screen);
-
-		if (mcount != 1 && isxinerama) {
-			m->sx = info[i].x_org;
-			m->sy = info[i].y_org;
-			m->sw = info[i].width;
-			m->sh = info[i].height;
-			fprintf(stderr, "monitor[%d]: %d,%d,%d,%d\n", i, m->sx, m->sy, m->sw, m->sh);
-		}
-		else {
-			m->sx = 0;
-			m->sy = 0;
-			m->sw = DisplayWidth(dpy, m->screen);
-			m->sh = DisplayHeight(dpy, m->screen);
-		}
+	/* init appearance */
+	dc.norm[ColBorder] = getcolor(normbordercolor);
+	dc.norm[ColBG] = getcolor(normbgcolor);
+	dc.norm[ColFG] = getcolor(normfgcolor);
+	dc.sel[ColBorder] = getcolor(selbordercolor);
+	dc.sel[ColBG] = getcolor(selbgcolor);
+	dc.sel[ColFG] = getcolor(selfgcolor);
+	dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
+	dc.gc = XCreateGC(dpy, root, 0, NULL);
+	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
+	if(!dc.font.set)
+		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
+
+	/* init bars */
+	for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
+		w = TEXTW(layouts[i].symbol);
+		blw = MAX(blw, w);
+	}
+	updatebars();
+	updatestatus();
 
-		m->seltags = emallocz(sizeof initags);
-		m->prevtags = emallocz(sizeof initags);
-
-		memcpy(m->seltags, initags, sizeof initags);
-		memcpy(m->prevtags, initags, sizeof initags);
-
-		/* init appearance */
-		m->dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR, m->screen);
-		m->dc.norm[ColBG] = getcolor(NORMBGCOLOR, m->screen);
-		m->dc.norm[ColFG] = getcolor(NORMFGCOLOR, m->screen);
-		m->dc.sel[ColBorder] = getcolor(SELBORDERCOLOR, m->screen);
-		m->dc.sel[ColBG] = getcolor(SELBGCOLOR, m->screen);
-		m->dc.sel[ColFG] = getcolor(SELFGCOLOR, m->screen);
-		initfont(m, FONT);
-		m->dc.h = bh = m->dc.font.height + 2;
-
-		/* init layouts */
-		m->mwfact = MWFACT;
-		m->layout = &layouts[0];
-		for(blw = k = 0; k < LENGTH(layouts); k++) {
-			j = textw(m, layouts[k].symbol);
-			if(j > blw)
-				blw = j;
-		}
+	/* EWMH support per view */
+	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
+			PropModeReplace, (unsigned char *) netatom, NetLast);
 
-		// TODO: bpos per screen?
-		bpos = BARPOS;
-		wa.override_redirect = 1;
-		wa.background_pixmap = ParentRelative;
-		wa.event_mask = ButtonPressMask | ExposureMask;
+	/* select for events */
+	wa.cursor = cursor[CurNormal];
+	wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
+			|EnterWindowMask|LeaveWindowMask|StructureNotifyMask
+			|PropertyChangeMask;
+	XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
+	XSelectInput(dpy, root, wa.event_mask);
 
-		/* init bars */
-		m->barwin = XCreateWindow(dpy, m->root, m->sx, m->sy, m->sw, bh, 0,
-				DefaultDepth(dpy, m->screen), CopyFromParent, DefaultVisual(dpy, m->screen),
-				CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
-		XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
-		updatebarpos(m);
-		XMapRaised(dpy, m->barwin);
-		strcpy(stext, "dwm-"VERSION);
-		m->dc.drawable = XCreatePixmap(dpy, m->root, m->sw, bh, DefaultDepth(dpy, m->screen));
-		m->dc.gc = XCreateGC(dpy, m->root, 0, 0);
-		XSetLineAttributes(dpy, m->dc.gc, 1, LineSolid, CapButt, JoinMiter);
-		if(!m->dc.font.set)
-			XSetFont(dpy, m->dc.gc, m->dc.font.xfont->fid);
-
-		/* EWMH support per monitor */
-		XChangeProperty(dpy, m->root, netatom[NetSupported], XA_ATOM, 32,
-				PropModeReplace, (unsigned char *) netatom, NetLast);
-
-		/* select for events */
-		wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
-				| EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
-		XChangeWindowAttributes(dpy, m->root, CWEventMask | CWCursor, &wa);
-		XSelectInput(dpy, m->root, wa.event_mask);
-	}
-	if(info)
-		XFree(info);
-
-	/* grab keys */
 	grabkeys();
+}
 
-	/* init tags */
-	compileregs();
-
-	selmonitor = monitorat();
-	fprintf(stderr, "selmonitor == %d\n", selmonitor);
+void
+showhide(Client *c) {
+	if(!c)
+		return;
+	if(ISVISIBLE(c)) { /* show clients top down */
+		XMoveWindow(dpy, c->win, c->x, c->y);
+		if(!lt[c->mon->sellt]->arrange || c->isfloating)
+			resize(c, c->x, c->y, c->w, c->h);
+		showhide(c->snext);
+	}
+	else { /* hide clients bottom up */
+		showhide(c->snext);
+		XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
+	}
 }
 
+
 void
-spawn(const char *arg) {
-	static char *shell = NULL;
+sigchld(int signal) {
+	while(0 < waitpid(-1, NULL, WNOHANG));
+}
 
-	if(!shell && !(shell = getenv("SHELL")))
-		shell = "/bin/sh";
-	if(!arg)
-		return;
-	/* The double-fork construct avoids zombie processes and keeps the code
-	 * clean from stupid signal handlers. */
+void
+spawn(const Arg *arg) {
+	signal(SIGCHLD, sigchld);
 	if(fork() == 0) {
-		if(fork() == 0) {
-			if(dpy)
-				close(ConnectionNumber(dpy));
-			setsid();
-			execl(shell, shell, "-c", arg, (char *)NULL);
-			fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
-			perror(" failed");
-		}
+		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(0);
 	}
-	wait(0);
 }
 
 void
-tag(const char *arg) {
+tag(const Arg *arg) {
+	if(selmon->sel && arg->ui & TAGMASK) {
+		selmon->sel->tags = arg->ui & TAGMASK;
+		arrange();
+	}
+}
+
+#ifdef XINERAMA
+void
+tagmon(const Arg *arg) {
 	unsigned int i;
+	Client *c;
+	Monitor *m;
 
-	if(!sel)
+	if(!(c = selmon->sel))
 		return;
-	for(i = 0; i < LENGTH(tags); i++)
-		sel->tags[i] = (NULL == arg);
-	sel->tags[idxoftag(arg)] = True;
-	arrange();
+	for(i = 0, m = mons; m; m = m->next, i++)
+		if(i == arg->ui) {
+			detach(c);
+			detachstack(c);
+			c->mon = m;
+			attach(c);
+			attachstack(c);
+			m->sel = c;
+			for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
+			selmon->sel = c;
+			arrange();
+			break;
+		}
 }
+#endif /* XINERAMA */
 
-unsigned int
-textnw(Monitor *m, const char *text, unsigned int len) {
+int
+textnw(const char *text, unsigned int len) {
 	XRectangle r;
 
-	if(m->dc.font.set) {
-		XmbTextExtents(m->dc.font.set, text, len, NULL, &r);
+	if(dc.font.set) {
+		XmbTextExtents(dc.font.set, text, len, NULL, &r);
 		return r.width;
 	}
-	return XTextWidth(m->dc.font.xfont, text, len);
-}
-
-unsigned int
-textw(Monitor *m, const char *text) {
-	return textnw(m, text, strlen(text)) + m->dc.font.height;
+	return XTextWidth(dc.font.xfont, text, len);
 }
 
 void
-tile(void) {
-	unsigned int i, j, n, nx, ny, nw, nh, mw, th;
-	Client *c, *mc;
-
-	domwfact = dozoom = True;
+tile(Monitor *m) {
+	int x, y, h, w, mw;
+	unsigned int i, n;
+	Client *c;
 
-	nx = ny = nw = 0; /* gcc stupidity requires this */
+	for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
+	if(n == 0)
+		return;
 
-	for (i = 0; i < mcount; i++) {
-		Monitor *m = &monitors[i];
+	/* master */
+	c = nexttiled(m->clients);
+	mw = m->mfact * m->ww;
+	resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw);
 
-		for(n = 0, c = nexttiled(clients, i); c; c = nexttiled(c->next, i))
-			n++;
+	if(--n == 0)
+		return;
 
-		for(j = 0, c = mc = nexttiled(clients, i); c; c = nexttiled(c->next, i)) {
-			/* window geoms */
-			mw = (n == 1) ? m->waw : m->mwfact * m->waw;
-			th = (n > 1) ? m->wah / (n - 1) : 0;
-			if(n > 1 && th < bh)
-				th = m->wah;
-			if(j == 0) { /* master */
-				nx = m->wax;
-				ny = m->way;
-				nw = mw - 2 * c->border;
-				nh = m->wah - 2 * c->border;
-			}
-			else {  /* tile window */
-				if(j == 1) {
-					ny = m->way;
-					nx += mc->w + 2 * mc->border;
-					nw = m->waw - mw - 2 * c->border;
-				}
-				if(j + 1 == n) /* remainder */
-					nh = (m->way + m->wah) - ny - 2 * c->border;
-				else
-					nh = th - 2 * c->border;
-			}
-			fprintf(stderr, "tile(%d, %d, %d, %d)\n", nx, ny, nw, nh);
-			resize(c, nx, ny, nw, nh, RESIZEHINTS);
-			if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
-				/* client doesn't accept size constraints */
-				resize(c, nx, ny, nw, nh, False);
-			if(n > 1 && th != m->wah)
-				ny = c->y + c->h + 2 * c->border;
-
-			j++;
-		}
+	/* tile stack */
+	x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
+	y = m->wy;
+	w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
+	h = m->wh / n;
+	if(h < bh)
+		h = m->wh;
+
+	for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
+		resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
+		       ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw));
+		if(h != m->wh)
+			y = c->y + HEIGHT(c);
 	}
-	fprintf(stderr, "done\n");
 }
+
 void
-togglebar(const char *arg) {
-	if(bpos == BarOff)
-		bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
-	else
-		bpos = BarOff;
-	updatebarpos(&monitors[monitorat()]);
+togglebar(const Arg *arg) {
+	selmon->showbar = !selmon->showbar;
+	updatebarpos(selmon);
+	XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
 	arrange();
 }
 
 void
-togglefloating(const char *arg) {
-	if(!sel)
+togglefloating(const Arg *arg) {
+	if(!selmon->sel)
 		return;
-	sel->isfloating = !sel->isfloating;
-	if(sel->isfloating)
-		resize(sel, sel->x, sel->y, sel->w, sel->h, True);
+	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);
 	arrange();
 }
 
 void
-toggletag(const char *arg) {
-	unsigned int i, j;
+toggletag(const Arg *arg) {
+	unsigned int mask;
 
-	if(!sel)
+	if(!selmon->sel)
 		return;
-	i = idxoftag(arg);
-	sel->tags[i] = !sel->tags[i];
-	for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
-	if(j == LENGTH(tags))
-		sel->tags[i] = True; /* at least one tag must be enabled */
-	arrange();
+	
+	mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
+	if(mask) {
+		selmon->sel->tags = mask;
+		arrange();
+	}
 }
 
 void
-toggleview(const char *arg) {
-	unsigned int i, j;
-
-	Monitor *m = &monitors[monitorat()];
+toggleview(const Arg *arg) {
+	unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
 
-	i = idxoftag(arg);
-	m->seltags[i] = !m->seltags[i];
-	for(j = 0; j < LENGTH(tags) && !m->seltags[j]; j++);
-	if(j == LENGTH(tags))
-		m->seltags[i] = True; /* at least one tag must be viewed */
-	arrange();
+	if(mask) {
+		selmon->tagset[selmon->seltags] = mask;
+		arrange();
+	}
 }
 
 void
-unban(Client *c) {
-	if(!c->isbanned)
+unfocus(Client *c) {
+	if(!c)
 		return;
-	XMoveWindow(dpy, c->win, c->x, c->y);
-	c->isbanned = False;
+	grabbuttons(c, False);
+	XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
+	XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 }
 
 void
 unmanage(Client *c) {
 	XWindowChanges wc;
 
-	wc.border_width = c->oldborder;
+	wc.border_width = c->oldbw;
 	/* The server grab construct avoids race conditions. */
 	XGrabServer(dpy);
 	XSetErrorHandler(xerrordummy);
 	XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
 	detach(c);
 	detachstack(c);
-	if(sel == c)
+	if(c->mon->sel == c) {
+		/* TODO: consider separate the next code into a function or into detachstack? */
+		Client *tc;
+		for(tc = c->mon->stack; tc && !ISVISIBLE(tc); tc = tc->snext);
+		c->mon->sel = tc;
 		focus(NULL);
+	}
 	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 	setclientstate(c, WithdrawnState);
-	free(c->tags);
 	free(c);
 	XSync(dpy, False);
 	XSetErrorHandler(xerror);
@@ -1849,29 +1646,152 @@ unmapnotify(XEvent *e) {
 }
 
 void
+updatebars(void) {
+	Monitor *m;
+	XSetWindowAttributes wa;
+
+	wa.override_redirect = True;
+	wa.background_pixmap = ParentRelative;
+	wa.event_mask = ButtonPressMask|ExposureMask;
+
+	for(m = mons; m; m = m->next) {
+		m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
+
+		                          CopyFromParent, DefaultVisual(dpy, screen),
+		                          CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
+		XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
+		XMapRaised(dpy, m->barwin);
+	}
+}
+
+void
 updatebarpos(Monitor *m) {
-	XEvent ev;
+	m->wy = m->my;
+	m->wh = m->mh;
+	if(m->showbar) {
+		m->wh -= bh;
+		m->by = m->topbar ? m->wy : m->wy + m->wh;
+		m->wy = m->topbar ? m->wy + bh : m->wy;
+	}
+	else
+		m->by = -bh;
+}
 
-	m->wax = m->sx;
-	m->way = m->sy;
-	m->wah = m->sh;
-	m->waw = m->sw;
-	switch(bpos) {
-	default:
-		m->wah -= bh;
-		m->way += bh;
-		XMoveWindow(dpy, m->barwin, m->sx, m->sy);
-		break;
-	case BarBot:
-		m->wah -= bh;
-		XMoveWindow(dpy, m->barwin, m->sx, m->sy + m->wah);
-		break;
-	case BarOff:
-		XMoveWindow(dpy, m->barwin, m->sx, m->sy - bh);
-		break;
+void
+updategeom(void) {
+	int i, di, n = 1, x, y;
+	unsigned int dui;
+	Client *c;
+	Monitor *newmons = NULL, *m, *tm;
+	Window dummy;
+
+#ifdef XINULATOR
+	n = 2;
+#elif defined(XINERAMA)
+	XineramaScreenInfo *info = NULL;
+
+	if(XineramaIsActive(dpy))
+		info = XineramaQueryScreens(dpy, &n);
+#endif
+	/* allocate monitor(s) for the new geometry setup */
+	for(i = 0; i < n; i++) {
+		m = (Monitor *)malloc(sizeof(Monitor));
+		m->next = newmons;
+		newmons = m;
 	}
-	XSync(dpy, False);
-	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+
+	/* initialise monitor(s) */
+#ifdef XINULATOR
+	if(1) {
+		m = newmons;
+		m->screen_number = 0;
+		m->wx = sx;
+		m->my = m->wy = sy;
+		m->ww = sw;
+		m->mh = m->wh = sh / 2;
+		m = newmons->next;
+		m->screen_number = 1;
+		m->wx = sx;
+		m->my = m->wy = sy + sh / 2;
+		m->ww = sw;
+		m->mh = m->wh = sh / 2;
+	}
+	else
+#elif defined(XINERAMA)
+	if(XineramaIsActive(dpy)) {
+		for(i = 0, m = newmons; m; m = m->next, i++) {
+			m->screen_number = info[i].screen_number;
+			m->wx = info[i].x_org;
+			m->my = m->wy = info[i].y_org;
+			m->ww = info[i].width;
+			m->mh = m->wh = info[i].height;
+		}
+		XFree(info);
+	}
+	else
+#endif
+	/* default monitor setup */
+	{
+		m->screen_number = 0;
+		m->wx = sx;
+		m->my = m->wy = sy;
+		m->ww = sw;
+		m->mh = m->wh = sh;
+	}
+
+	/* bar geometry setup */
+	for(m = newmons; m; m = m->next) {
+		/* TODO: consider removing the following values from config.h */
+		m->clients = NULL;
+		m->sel = NULL;
+		m->stack = NULL;
+		m->seltags = 0;
+		m->sellt = 0;
+		m->tagset[0] = m->tagset[1] = 1;
+		m->mfact = mfact;
+		m->showbar = showbar;
+		m->topbar = topbar;
+		updatebarpos(m);
+	}
+
+	/* reassign left over clients of disappeared monitors */
+	for(tm = mons; tm; tm = tm->next)
+		while(tm->clients) {
+			c = tm->clients;
+			tm->clients = c->next;
+			detachstack(c);
+			c->mon = newmons;
+			attach(c);
+			attachstack(c);
+		}
+
+	/* select focused monitor */
+	selmon = newmons;
+	if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui)) 
+		for(m = newmons; m; m = m->next)
+			if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh)) {
+				selmon = m;
+				break;
+			}
+
+	/* final assignment of new monitors */
+	cleanupmons();
+	mons = newmons;
+}
+
+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
@@ -1879,57 +1799,62 @@ updatesizehints(Client *c) {
 	long msize;
 	XSizeHints size;
 
-	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
+	if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
+		/* size is uninitialized, ensure that size.flags aren't used */
 		size.flags = PSize;
-	c->flags = size.flags;
-	if(c->flags & PBaseSize) {
+	if(size.flags & PBaseSize) {
 		c->basew = size.base_width;
 		c->baseh = size.base_height;
 	}
-	else if(c->flags & PMinSize) {
+	else if(size.flags & PMinSize) {
 		c->basew = size.min_width;
 		c->baseh = size.min_height;
 	}
 	else
 		c->basew = c->baseh = 0;
-	if(c->flags & PResizeInc) {
+	if(size.flags & PResizeInc) {
 		c->incw = size.width_inc;
 		c->inch = size.height_inc;
 	}
 	else
 		c->incw = c->inch = 0;
-	if(c->flags & PMaxSize) {
+	if(size.flags & PMaxSize) {
 		c->maxw = size.max_width;
 		c->maxh = size.max_height;
 	}
 	else
 		c->maxw = c->maxh = 0;
-	if(c->flags & PMinSize) {
+	if(size.flags & PMinSize) {
 		c->minw = size.min_width;
 		c->minh = size.min_height;
 	}
-	else if(c->flags & PBaseSize) {
+	else if(size.flags & PBaseSize) {
 		c->minw = size.base_width;
 		c->minh = size.base_height;
 	}
 	else
 		c->minw = c->minh = 0;
-	if(c->flags & PAspect) {
-		c->minax = size.min_aspect.x;
-		c->maxax = size.max_aspect.x;
-		c->minay = size.min_aspect.y;
-		c->maxay = size.max_aspect.y;
+	if(size.flags & PAspect) {
+		c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
+		c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
 	}
 	else
-		c->minax = c->maxax = c->minay = c->maxay = 0;
+		c->maxa = c->mina = 0.0;
 	c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
-			&& c->maxw == c->minw && c->maxh == c->minh);
+	             && c->maxw == c->minw && c->maxh == c->minh);
 }
 
 void
 updatetitle(Client *c) {
 	if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
-		gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
+		gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
+}
+
+void
+updatestatus() {
+	if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
+		strcpy(stext, "dwm-"VERSION);
+	drawbar(selmon);
 }
 
 void
@@ -1937,11 +1862,27 @@ updatewmhints(Client *c) {
 	XWMHints *wmh;
 
 	if((wmh = XGetWMHints(dpy, c->win))) {
-		c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
+		if(c == selmon->sel && wmh->flags & XUrgencyHint) {
+			wmh->flags &= ~XUrgencyHint;
+			XSetWMHints(dpy, c->win, wmh);
+		}
+		else
+			c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
+
 		XFree(wmh);
 	}
 }
 
+void
+view(const Arg *arg) {
+	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;
+	arrange();
+}
+
 /* 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.  */
@@ -1953,63 +1894,36 @@ xerror(Display *dpy, XErrorEvent *ee) {
 	|| (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);
+			ee->request_code, ee->error_code);
 	return xerrorxlib(dpy, ee); /* may call exit */
 }
 
 int
-xerrordummy(Display *dsply, XErrorEvent *ee) {
+xerrordummy(Display *dpy, XErrorEvent *ee) {
 	return 0;
 }
 
 /* Startup Error handler to check if another window manager
  * is already running. */
 int
-xerrorstart(Display *dsply, XErrorEvent *ee) {
+xerrorstart(Display *dpy, XErrorEvent *ee) {
 	otherwm = True;
 	return -1;
 }
 
 void
-view(const char *arg) {
-	unsigned int i;
-	Bool tmp[LENGTH(tags)];
-	Monitor *m = &monitors[monitorat()];
-
-	for(i = 0; i < LENGTH(tags); i++)
-		tmp[i] = (NULL == arg);
-	tmp[idxoftag(arg)] = True;
-	if(memcmp(m->seltags, tmp, sizeof initags) != 0) {
-		memcpy(m->prevtags, m->seltags, sizeof initags);
-		memcpy(m->seltags, tmp, sizeof initags);
-		arrange();
-	}
-}
-
-void
-viewprevtag(const char *arg) {
-	static Bool tmp[LENGTH(tags)];
-
-	Monitor *m = &monitors[monitorat()];
-
-	memcpy(tmp, m->seltags, sizeof initags);
-	memcpy(m->seltags, m->prevtags, sizeof initags);
-	memcpy(m->prevtags, tmp, sizeof initags);
-	arrange();
-}
-
-void
-zoom(const char *arg) {
-	Client *c;
+zoom(const Arg *arg) {
+	Client *c = selmon->sel;
 
-	if(!sel || !dozoom || sel->isfloating)
+	if(!lt[selmon->sellt]->arrange || lt[selmon->sellt]->arrange == monocle || (selmon->sel && selmon->sel->isfloating))
 		return;
-	if((c = sel) == nexttiled(clients, c->monitor))
-		if(!(c = nexttiled(c->next, c->monitor)))
+	if(c == nexttiled(selmon->clients))
+		if(!c || !(c = nexttiled(c->next)))
 			return;
 	detach(c);
 	attach(c);
@@ -2017,41 +1931,21 @@ zoom(const char *arg) {
 	arrange();
 }
 
-void
-movetomonitor(const char *arg) {
-	if (sel) {
-		sel->monitor = arg ? atoi(arg) : (sel->monitor+1) % mcount;
-
-		memcpy(sel->tags, monitors[sel->monitor].seltags, sizeof initags);
-		resize(sel, monitors[sel->monitor].wax, monitors[sel->monitor].way, sel->w, sel->h, True);
-		arrange();
-	}
-}
-
-void
-selectmonitor(const char *arg) {
-	Monitor *m = &monitors[arg ? atoi(arg) : (monitorat()+1) % mcount];
-
-	XWarpPointer(dpy, None, m->root, 0, 0, 0, 0, m->wax+m->waw/2, m->way+m->wah/2);
-	focus(NULL);
-}
-
-
 int
 main(int argc, char *argv[]) {
 	if(argc == 2 && !strcmp("-v", argv[1]))
-		eprint("dwm-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk, "
-		       "Jukka Salmi, Premysl Hruby, Szabolcs Nagy, Christof Musik\n");
+		die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
 	else if(argc != 1)
-		eprint("usage: dwm [-v]\n");
+		die("usage: dwm [-v]\n");
+
+	if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
+		fputs("warning: no locale support\n", stderr);
 
-	setlocale(LC_CTYPE, "");
-	if(!(dpy = XOpenDisplay(0)))
-		eprint("dwm: cannot open display\n");
+	if(!(dpy = XOpenDisplay(NULL)))
+		die("dwm: cannot open display\n");
 
 	checkotherwm();
 	setup();
-	drawbar();
 	scan();
 	run();
 	cleanup();