diff --git a/Makefile b/Makefile
index 8e48185..4f03721 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 
 include config.mk
 
-SRC += bar.c client.c event.c main.c screen.c util.c
+SRC = dwm.c
 OBJ = ${SRC:.c=.o}
 
 all: options dwm
@@ -18,7 +18,7 @@ options:
 	@echo CC $<
 	@${CC} -c ${CFLAGS} $<
 
-${OBJ}: dwm.h config.h config.mk
+${OBJ}: config.h config.mk
 
 dwm: ${OBJ}
 	@echo CC -o $@
@@ -32,7 +32,7 @@ dist: clean
 	@echo creating dist tarball
 	@mkdir -p dwm-${VERSION}
 	@cp -R LICENSE Makefile README config.h config.mk \
-		dwm.1 dwm.h tile.h ${SRC} dwm-${VERSION}
+		dwm.1 ${SRC} dwm-${VERSION}
 	@tar -cf dwm-${VERSION}.tar dwm-${VERSION}
 	@gzip dwm-${VERSION}.tar
 	@rm -rf dwm-${VERSION}
diff --git a/bar.c b/bar.c
deleted file mode 100644
index 91689cf..0000000
--- a/bar.c
+++ /dev/null
@@ -1,263 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "dwm.h"
-#include <string.h>
-#include <stdio.h>
-
-/* static */
-
-static void
-drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
-	int x;
-	XGCValues gcv;
-	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
-
-	gcv.foreground = col[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, dc.drawable, dc.gc, &r, 1);
-	}
-	else if(empty) {
-		r.width = r.height = x;
-		XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
-	}
-}
-
-static unsigned long
-initcolor(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);
-	return color.pixel;
-}
-
-static void
-initfont(const char *fontstr) {
-	char *def, **missing;
-	int i, n;
-
-	missing = NULL;
-	if(dc.font.set)
-		XFreeFontSet(dpy, dc.font.set);
-	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(dc.font.set) {
-		XFontSetExtents *font_extents;
-		XFontStruct **xfonts;
-		char **font_names;
-		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++) {
-			if(dc.font.ascent < (*xfonts)->ascent)
-				dc.font.ascent = (*xfonts)->ascent;
-			if(dc.font.descent < (*xfonts)->descent)
-				dc.font.descent = (*xfonts)->descent;
-			xfonts++;
-		}
-	}
-	else {
-		if(dc.font.xfont)
-			XFreeFont(dpy, dc.font.xfont);
-		dc.font.xfont = NULL;
-		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
-		|| !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
-			eprint("error, cannot load font: '%s'\n", fontstr);
-		dc.font.ascent = dc.font.xfont->ascent;
-		dc.font.descent = dc.font.xfont->descent;
-	}
-	dc.font.height = dc.font.ascent + dc.font.descent;
-}
-
-static Bool
-isoccupied(unsigned int t) {
-	Client *c;
-
-	for(c = clients; c; c = c->next)
-		if(c->tags[t])
-			return True;
-	return False;
-}
-
-static unsigned int
-textnw(const char *text, unsigned int len) {
-	XRectangle r;
-
-	if(dc.font.set) {
-		XmbTextExtents(dc.font.set, text, len, NULL, &r);
-		return r.width;
-	}
-	return XTextWidth(dc.font.xfont, text, len);
-}
-
-static void
-drawtext(const char *text, unsigned long col[ColLast]) {
-	int x, y, w, h;
-	static char buf[256];
-	unsigned int len, olen;
-	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
-
-	XSetForeground(dpy, dc.gc, col[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 = 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(buf, len)) > 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 > dc.w)
-		return; /* too long */
-	XSetForeground(dpy, dc.gc, col[ColFG]);
-	if(dc.font.set)
-		XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
-	else
-		XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
-}
-
-/* extern */
-
-unsigned int bh;
-unsigned int bpos = BARPOS;
-DC dc = {0};
-Window barwin;
-
-void
-drawbar(void) {
-	int i, x;
-
-	dc.x = dc.y = 0;
-	for(i = 0; i < ntags; i++) {
-		dc.w = textw(tags[i]);
-		if(seltags[i]) {
-			drawtext(tags[i], dc.sel);
-			drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
-		}
-		else {
-			drawtext(tags[i], dc.norm);
-			drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
-		}
-		dc.x += dc.w;
-	}
-	dc.w = blw;
-	drawtext(getsymbol(), dc.norm);
-	x = dc.x + dc.w;
-	dc.w = textw(stext);
-	dc.x = sw - dc.w;
-	if(dc.x < x) {
-		dc.x = x;
-		dc.w = sw - x;
-	}
-	drawtext(stext, dc.norm);
-	if((dc.w = dc.x - x) > bh) {
-		dc.x = x;
-		if(sel) {
-			drawtext(sel->name, dc.sel);
-			drawsquare(sel->ismax, sel->isfloating, dc.sel);
-		}
-		else
-			drawtext(NULL, dc.norm);
-	}
-	XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
-	XSync(dpy, False);
-}
-
-void
-initstyle(void) {
-	dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
-	dc.norm[ColBG] = initcolor(NORMBGCOLOR);
-	dc.norm[ColFG] = initcolor(NORMFGCOLOR);
-	dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
-	dc.sel[ColBG] = initcolor(SELBGCOLOR);
-	dc.sel[ColFG] = initcolor(SELFGCOLOR);
-	initfont(FONT);
-	dc.h = bh = dc.font.height + 2;
-}
-
-void
-initbar(void) {
-	XSetWindowAttributes wa;
-
-	wa.override_redirect = 1;
-	wa.background_pixmap = ParentRelative;
-	wa.event_mask = ButtonPressMask | ExposureMask;
-	barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
-			DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
-			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
-	XDefineCursor(dpy, barwin, cursor[CurNormal]);
-	updatebarpos();
-	XMapRaised(dpy, barwin);
-	strcpy(stext, "dwm-"VERSION);
-	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
-	dc.gc = XCreateGC(dpy, root, 0, 0);
-	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
-	if(!dc.font.set)
-		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
-}
-
-unsigned int
-textw(const char *text) {
-	return textnw(text, strlen(text)) + dc.font.height;
-}
-
-void
-togglebar(const char *arg) {
-	if(bpos == BarOff)
-		bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
-	else
-		bpos = BarOff;
-	updatebarpos();
-	arrange();
-}
-
-void
-updatebarpos(void) {
-	XEvent ev;
-
-	wax = sx;
-	way = sy;
-	wah = sh;
-	waw = sw;
-	switch(bpos) {
-	default:
-		wah -= bh;
-		way += bh;
-		XMoveWindow(dpy, barwin, sx, sy);
-		break;
-	case BarBot:
-		wah -= bh;
-		XMoveWindow(dpy, barwin, sx, sy + wah);
-		break;
-	case BarOff:
-		XMoveWindow(dpy, barwin, sx, sy - bh);
-		break;
-	}
-	XSync(dpy, False);
-	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
-}
-
-
diff --git a/client.c b/client.c
deleted file mode 100644
index c716625..0000000
--- a/client.c
+++ /dev/null
@@ -1,386 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "dwm.h"
-#include <stdlib.h>
-#include <X11/Xutil.h>
-
-/* static */
-
-static void
-attachstack(Client *c) {
-	c->snext = stack;
-	stack = c;
-}
-
-static void
-detachstack(Client *c) {
-	Client **tc;
-
-	for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
-	*tc = c->snext;
-}
-
-static 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);
-	}
-	else
-		XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
-				GrabModeAsync, GrabModeSync, None, None);
-}
-
-static Bool
-isprotodel(Client *c) {
-	int i, n;
-	Atom *protocols;
-	Bool ret = False;
-
-	if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
-		for(i = 0; !ret && i < n; i++)
-			if(protocols[i] == wmatom[WMDelete])
-				ret = True;
-		XFree(protocols);
-	}
-	return ret;
-}
-
-static void
-setclientstate(Client *c, long state) {
-	long data[] = {state, None};
-
-	XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
-			PropModeReplace, (unsigned char *)data, 2);
-}
-
-static int
-xerrordummy(Display *dsply, XErrorEvent *ee) {
-	return 0;
-}
-
-/* extern */
-
-void
-attach(Client *c) {
-	if(clients)
-		clients->prev = c;
-	c->next = clients;
-	clients = c;
-}
-
-void
-ban(Client *c) {
-	if(c->isbanned)
-		return;
-	XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
-	c->isbanned = True;
-}
-
-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->border;
-	ce.above = None;
-	ce.override_redirect = False;
-	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
-}
-
-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;
-}
-
-void
-focus(Client *c) {
-	if((!c && selscreen) || (c && !isvisible(c)))
-		for(c = stack; c && !isvisible(c); c = c->snext);
-	if(sel && sel != c) {
-		grabbuttons(sel, False);
-		XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
-	}
-	if(c) {
-		detachstack(c);
-		attachstack(c);
-		grabbuttons(c, True);
-	}
-	sel = c;
-	drawbar();
-	if(!selscreen)
-		return;
-	if(c) {
-		XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
-		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
-	}
-	else
-		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
-}
-
-void
-killclient(const char *arg) {
-	XEvent ev;
-
-	if(!sel)
-		return;
-	if(isprotodel(sel)) {
-		ev.type = ClientMessage;
-		ev.xclient.window = 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);
-	}
-	else
-		XKillClient(dpy, sel->win);
-}
-
-void
-manage(Window w, XWindowAttributes *wa) {
-	unsigned int i;
-	Client *c, *t = NULL;
-	Window trans;
-	Status rettrans;
-	XWindowChanges wc;
-
-	c = emallocz(sizeof(Client));
-	c->tags = emallocz(ntags * sizeof(Bool));
-	c->win = w;
-	c->x = wa->x;
-	c->y = wa->y;
-	c->w = wa->width;
-	c->h = wa->height;
-	c->oldborder = wa->border_width;
-	if(c->w == sw && c->h == sh) {
-		c->x = sx;
-		c->y = sy;
-		c->border = wa->border_width;
-	}
-	else {
-		if(c->x + c->w + 2 * c->border > wax + waw)
-			c->x = wax + waw - c->w - 2 * c->border;
-		if(c->y + c->h + 2 * c->border > way + wah)
-			c->y = way + wah - c->h - 2 * c->border;
-		if(c->x < wax)
-			c->x = wax;
-		if(c->y < way)
-			c->y = way;
-		c->border = BORDERPX;
-	}
-	wc.border_width = c->border;
-	XConfigureWindow(dpy, w, CWBorderWidth, &wc);
-	XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
-	configure(c); /* propagates border_width, if size doesn't change */
-	updatesizehints(c);
-	XSelectInput(dpy, w,
-		StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
-	grabbuttons(c, False);
-	updatetitle(c);
-	if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
-		for(t = clients; t && t->win != trans; t = t->next);
-	if(t)
-		for(i = 0; i < ntags; i++)
-			c->tags[i] = t->tags[i];
-	applyrules(c);
-	if(!c->isfloating)
-		c->isfloating = (rettrans == Success) || c->isfixed;
-	attach(c);
-	attachstack(c);
-	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
-	ban(c);
-	XMapWindow(dpy, c->win);
-	setclientstate(c, NormalState);
-	arrange();
-}
-
-void
-resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
-	double dx, dy, max, min, ratio;
-	XWindowChanges wc; 
-
-	if(sizehints) {
-		if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
-			dx = (double)(w - c->basew);
-			dy = (double)(h - c->baseh);
-			min = (double)(c->minax) / (double)(c->minay);
-			max = (double)(c->maxax) / (double)(c->maxay);
-			ratio = dx / dy;
-			if(max > 0 && min > 0 && ratio > 0) {
-				if(ratio < min) {
-					dy = (dx * min + dy) / (min * min + 1);
-					dx = dy * min;
-					w = (int)dx + c->basew;
-					h = (int)dy + c->baseh;
-				}
-				else if(ratio > max) {
-					dy = (dx * min + dy) / (max * max + 1);
-					dx = dy * min;
-					w = (int)dx + c->basew;
-					h = (int)dy + c->baseh;
-				}
-			}
-		}
-		if(c->minw && w < c->minw)
-			w = c->minw;
-		if(c->minh && h < c->minh)
-			h = c->minh;
-		if(c->maxw && w > c->maxw)
-			w = c->maxw;
-		if(c->maxh && h > c->maxh)
-			h = c->maxh;
-		if(c->incw)
-			w -= (w - c->basew) % c->incw;
-		if(c->inch)
-			h -= (h - c->baseh) % c->inch;
-	}
-	if(w <= 0 || h <= 0)
-		return;
-	/* offscreen appearance fixes */
-	if(x > sw)
-		x = sw - w - 2 * c->border;
-	if(y > sh)
-		y = sh - h - 2 * c->border;
-	if(x + w + 2 * c->border < sx)
-		x = sx;
-	if(y + h + 2 * c->border < sy)
-		y = sy;
-	if(c->x != x || c->y != y || c->w != w || c->h != 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);
-		configure(c);
-		XSync(dpy, False);
-	}
-}
-
-void
-unban(Client *c) {
-	if(!c->isbanned)
-		return;
-	XMoveWindow(dpy, c->win, c->x, c->y);
-	c->isbanned = False;
-}
-
-void
-unmanage(Client *c) {
-	XWindowChanges wc;
-
-	wc.border_width = c->oldborder;
-	/* 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)
-		focus(NULL);
-	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
-	setclientstate(c, WithdrawnState);
-	free(c->tags);
-	free(c);
-	XSync(dpy, False);
-	XSetErrorHandler(xerror);
-	XUngrabServer(dpy);
-	arrange();
-}
-
-void
-updatesizehints(Client *c) {
-	long msize;
-	XSizeHints size;
-
-	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
-		size.flags = PSize;
-	c->flags = size.flags;
-	if(c->flags & PBaseSize) {
-		c->basew = size.base_width;
-		c->baseh = size.base_height;
-	}
-	else if(c->flags & PMinSize) {
-		c->basew = size.min_width;
-		c->baseh = size.min_height;
-	}
-	else
-		c->basew = c->baseh = 0;
-	if(c->flags & PResizeInc) {
-		c->incw = size.width_inc;
-		c->inch = size.height_inc;
-	}
-	else
-		c->incw = c->inch = 0;
-	if(c->flags & PMaxSize) {
-		c->maxw = size.max_width;
-		c->maxh = size.max_height;
-	}
-	else
-		c->maxw = c->maxh = 0;
-	if(c->flags & PMinSize) {
-		c->minw = size.min_width;
-		c->minh = size.min_height;
-	}
-	else if(c->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;
-	}
-	else
-		c->minax = c->maxax = c->minay = c->maxay = 0;
-	c->isfixed = (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);
-}
diff --git a/config.h b/config.h
index f946407..9dec069 100644
--- a/config.h
+++ b/config.h
@@ -12,24 +12,20 @@
 #define SELFGCOLOR		"#fff"
 
 /* tagging */
-#define TAGS \
-const char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9", NULL };
-#define RULES \
-static Rule rules[] = { \
-	/* class:instance:title regex	tags regex	isfloating */ \
-	{ "Firefox",			"3",		False }, \
-	{ "Gimp",			NULL,		True }, \
-	{ "MPlayer",			NULL,		True }, \
-	{ "Acroread",			NULL,		True }, \
+static const char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9", NULL };
+static Rule rules[] = {
+	/* class:instance:title regex	tags regex	isfloating */
+	{ "Firefox",			"3",		False },
+	{ "Gimp",			NULL,		True },
+	{ "MPlayer",			NULL,		True },
+	{ "Acroread",			NULL,		True },
 };
 
 /* layout(s) */
-#include "tile.h"
-#define LAYOUTS \
-static Layout layouts[] = { \
-	/* symbol		function */ \
-	{ "[]=",		tile }, /* first entry is default */ \
-	{ "><>",		floating }, \
+static Layout layouts[] = {
+	/* symbol		function */
+	{ "[]=",		tile }, /* first entry is default */
+	{ "><>",		floating },
 };
 #define RESIZEHINTS		True	/* False - respect size hints in tiled resizals */
 #define MWFACT			0.6	/* master width factor [0.1 .. 0.9] */
diff --git a/config.mk b/config.mk
index 4b2ff6c..3a3ed7a 100644
--- a/config.mk
+++ b/config.mk
@@ -3,9 +3,6 @@ VERSION = 4.5
 
 # Customize below to fit your system
 
-# additional layouts beside floating
-SRC = tile.c
-
 # paths
 PREFIX = /usr/local
 MANPREFIX = ${PREFIX}/share/man
diff --git a/dwm.c b/dwm.c
new file mode 100644
index 0000000..d497f4c
--- /dev/null
+++ b/dwm.c
@@ -0,0 +1,1847 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <locale.h>
+#include <regex.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/select.h>
+#include <sys/wait.h>
+#include <X11/cursorfont.h>
+#include <X11/keysym.h>
+#include <X11/Xatom.h>
+#include <X11/Xproto.h>
+#include <X11/Xutil.h>
+
+/* macros */
+#define BUTTONMASK		(ButtonPressMask | ButtonReleaseMask)
+#define CLEANMASK(mask)		(mask & ~(numlockmask | LockMask))
+#define MOUSEMASK		(BUTTONMASK | PointerMotionMask)
+
+/* 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 */
+
+/* typedefs */
+typedef struct Client Client;
+struct Client {
+	char name[256];
+	int x, y, w, h;
+	int rx, ry, rw, rh; /* revert geometry */
+	int basew, baseh, incw, inch, maxw, maxh, minw, minh;
+	int minax, maxax, minay, maxay;
+	long flags; 
+	unsigned int border, oldborder;
+	Bool isbanned, isfixed, ismax, isfloating;
+	Bool *tags;
+	Client *next;
+	Client *prev;
+	Client *snext;
+	Window win;
+};
+
+typedef struct {
+	int x, y, w, h;
+	unsigned long norm[ColLast];
+	unsigned long sel[ColLast];
+	Drawable drawable;
+	GC gc;
+	struct {
+		int ascent;
+		int descent;
+		int height;
+		XFontSet set;
+		XFontStruct *xfont;
+	} font;
+} DC; /* draw context */
+
+typedef struct {
+	unsigned long mod;
+	KeySym keysym;
+	void (*func)(const char *arg);
+	const char *arg;
+} Key;
+
+typedef struct {
+	const char *symbol;
+	void (*arrange)(void);
+} Layout;
+
+typedef struct {
+	const char *prop;
+	const char *tags;
+	Bool isfloating;
+} Rule;
+
+typedef struct {
+	regex_t *propregex;
+	regex_t *tagregex;
+} Regs;
+
+/* functions */
+static void eprint(const char *errstr, ...);
+static void *emallocz(unsigned int size);
+static void spawn(const char *arg);
+static void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
+static unsigned long initcolor(const char *colstr);
+static void initfont(const char *fontstr);
+static Bool isoccupied(unsigned int t);
+static unsigned int textnw(const char *text, unsigned int len);
+static void drawtext(const char *text, unsigned long col[ColLast]);
+static void drawbar(void);
+static void initstyle(void);
+static void initbar(void);
+static unsigned int textw(const char *text);
+static void togglebar(const char *arg);
+static void updatebarpos(void);
+static void attachstack(Client *c);
+static void detachstack(Client *c);
+static void grabbuttons(Client *c, Bool focused);
+static Bool isprotodel(Client *c);
+static void setclientstate(Client *c, long state);
+static int xerrordummy(Display *dsply, XErrorEvent *ee);
+static void ban(Client *c);
+static void configure(Client *c);
+static void killclient(const char *arg);
+static void manage(Window w, XWindowAttributes *wa);
+static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
+static void unban(Client *c);
+static void unmanage(Client *c);
+static void updatesizehints(Client *c);
+static void updatetitle(Client *c);
+static Client *getclient(Window w);
+static void movemouse(Client *c);
+static void resizemouse(Client *c);
+static void buttonpress(XEvent *e);
+static void configurerequest(XEvent *e);
+static void configurenotify(XEvent *e);
+static void destroynotify(XEvent *e);
+static void enternotify(XEvent *e);
+static void expose(XEvent *e);
+static void keypress(XEvent *e);
+static void leavenotify(XEvent *e);
+static void mappingnotify(XEvent *e);
+static void maprequest(XEvent *e);
+static void propertynotify(XEvent *e);
+static void unmapnotify(XEvent *e);
+static void grabkeys(void);
+static unsigned int idxoftag(const char *tag);
+static void floating(void); /* default floating layout */
+static void applyrules(Client *c);
+static void compileregs(void);
+static void focusnext(const char *arg);
+static void focusprev(const char *arg);
+static void initlayouts(void);
+static Bool isfloating(void);
+static Bool isvisible(Client *c);
+static void restack(void);
+static void setlayout(const char *arg);
+static void tag(const char *arg);
+static void togglefloating(const char *arg);
+static void togglemax(const char *arg);
+static void toggletag(const char *arg);
+static void toggleview(const char *arg);
+static void view(const char *arg);
+static void cleanup(void);
+static long getstate(Window w);
+static void scan(void);
+static void setup(void);
+static int xerrorstart(Display *dsply, XErrorEvent *ee);
+static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
+static void quit(const char *arg);
+static int xerror(Display *dpy, XErrorEvent *ee);
+static void arrange(void);
+static void attach(Client *c);
+static void detach(Client *c);
+static void focus(Client *c);
+static Bool isarrange(void (*func)());
+static Client *nexttiled(Client *c);
+static void setmwfact(const char *arg);
+static void tile(void);
+static void zoom(const char *arg);
+
+#include "config.h"
+
+/* variables */
+static char stext[256];
+static double mwfact = MWFACT;
+static int screen, sx, sy, sw, sh, wax, way, waw, wah;
+static int (*xerrorxlib)(Display *, XErrorEvent *);
+static unsigned int bh;
+static unsigned int blw = 0;
+static unsigned int bpos = BARPOS;
+static unsigned int ltidx = 0; /* default */
+static unsigned int nlayouts = 0;
+static unsigned int nrules = 0;
+static unsigned int ntags;
+static unsigned int numlockmask = 0;
+static void (*handler[LASTEvent]) (XEvent *) = {
+	[ButtonPress] = buttonpress,
+	[ConfigureRequest] = configurerequest,
+	[ConfigureNotify] = configurenotify,
+	[DestroyNotify] = destroynotify,
+	[EnterNotify] = enternotify,
+	[LeaveNotify] = leavenotify,
+	[Expose] = expose,
+	[KeyPress] = keypress,
+	[MappingNotify] = mappingnotify,
+	[MapRequest] = maprequest,
+	[PropertyNotify] = propertynotify,
+	[UnmapNotify] = unmapnotify
+};
+static Atom wmatom[WMLast], netatom[NetLast];
+static Bool otherwm, readin;
+static Bool running = True;
+static Bool *seltags;
+static Bool selscreen = True;
+static Client *clients = NULL;
+static Client *sel = NULL;
+static Client *stack = NULL;
+static Cursor cursor[CurLast];
+static Display *dpy;
+static DC dc = {0};
+static Window barwin, root;
+static Regs *regs = NULL;
+
+static void
+eprint(const char *errstr, ...) {
+	va_list ap;
+
+	va_start(ap, errstr);
+	vfprintf(stderr, errstr, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
+
+static void *
+emallocz(unsigned int size) {
+	void *res = calloc(1, size);
+
+	if(!res)
+		eprint("fatal: could not malloc() %u bytes\n", size);
+	return res;
+}
+
+static void
+spawn(const char *arg) {
+	static char *shell = NULL;
+
+	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. */
+	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");
+		}
+		exit(0);
+	}
+	wait(0);
+}
+
+static void
+drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
+	int x;
+	XGCValues gcv;
+	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
+
+	gcv.foreground = col[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, dc.drawable, dc.gc, &r, 1);
+	}
+	else if(empty) {
+		r.width = r.height = x;
+		XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+	}
+}
+
+static unsigned long
+initcolor(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);
+	return color.pixel;
+}
+
+static void
+initfont(const char *fontstr) {
+	char *def, **missing;
+	int i, n;
+
+	missing = NULL;
+	if(dc.font.set)
+		XFreeFontSet(dpy, dc.font.set);
+	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(dc.font.set) {
+		XFontSetExtents *font_extents;
+		XFontStruct **xfonts;
+		char **font_names;
+		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++) {
+			if(dc.font.ascent < (*xfonts)->ascent)
+				dc.font.ascent = (*xfonts)->ascent;
+			if(dc.font.descent < (*xfonts)->descent)
+				dc.font.descent = (*xfonts)->descent;
+			xfonts++;
+		}
+	}
+	else {
+		if(dc.font.xfont)
+			XFreeFont(dpy, dc.font.xfont);
+		dc.font.xfont = NULL;
+		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
+		|| !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
+			eprint("error, cannot load font: '%s'\n", fontstr);
+		dc.font.ascent = dc.font.xfont->ascent;
+		dc.font.descent = dc.font.xfont->descent;
+	}
+	dc.font.height = dc.font.ascent + dc.font.descent;
+}
+
+static Bool
+isoccupied(unsigned int t) {
+	Client *c;
+
+	for(c = clients; c; c = c->next)
+		if(c->tags[t])
+			return True;
+	return False;
+}
+
+static unsigned int
+textnw(const char *text, unsigned int len) {
+	XRectangle r;
+
+	if(dc.font.set) {
+		XmbTextExtents(dc.font.set, text, len, NULL, &r);
+		return r.width;
+	}
+	return XTextWidth(dc.font.xfont, text, len);
+}
+
+static void
+drawtext(const char *text, unsigned long col[ColLast]) {
+	int x, y, w, h;
+	static char buf[256];
+	unsigned int len, olen;
+	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
+
+	XSetForeground(dpy, dc.gc, col[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 = 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(buf, len)) > 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 > dc.w)
+		return; /* too long */
+	XSetForeground(dpy, dc.gc, col[ColFG]);
+	if(dc.font.set)
+		XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
+	else
+		XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
+}
+
+static void
+drawbar(void) {
+	int i, x;
+
+	dc.x = dc.y = 0;
+	for(i = 0; i < ntags; i++) {
+		dc.w = textw(tags[i]);
+		if(seltags[i]) {
+			drawtext(tags[i], dc.sel);
+			drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
+		}
+		else {
+			drawtext(tags[i], dc.norm);
+			drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
+		}
+		dc.x += dc.w;
+	}
+	dc.w = blw;
+	drawtext(layouts[ltidx].symbol, dc.norm);
+	x = dc.x + dc.w;
+	dc.w = textw(stext);
+	dc.x = sw - dc.w;
+	if(dc.x < x) {
+		dc.x = x;
+		dc.w = sw - x;
+	}
+	drawtext(stext, dc.norm);
+	if((dc.w = dc.x - x) > bh) {
+		dc.x = x;
+		if(sel) {
+			drawtext(sel->name, dc.sel);
+			drawsquare(sel->ismax, sel->isfloating, dc.sel);
+		}
+		else
+			drawtext(NULL, dc.norm);
+	}
+	XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
+	XSync(dpy, False);
+}
+
+static void
+initstyle(void) {
+	dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
+	dc.norm[ColBG] = initcolor(NORMBGCOLOR);
+	dc.norm[ColFG] = initcolor(NORMFGCOLOR);
+	dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
+	dc.sel[ColBG] = initcolor(SELBGCOLOR);
+	dc.sel[ColFG] = initcolor(SELFGCOLOR);
+	initfont(FONT);
+	dc.h = bh = dc.font.height + 2;
+}
+
+static void
+initbar(void) {
+	XSetWindowAttributes wa;
+
+	wa.override_redirect = 1;
+	wa.background_pixmap = ParentRelative;
+	wa.event_mask = ButtonPressMask | ExposureMask;
+	barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
+			DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
+			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
+	XDefineCursor(dpy, barwin, cursor[CurNormal]);
+	updatebarpos();
+	XMapRaised(dpy, barwin);
+	strcpy(stext, "dwm-"VERSION);
+	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
+	dc.gc = XCreateGC(dpy, root, 0, 0);
+	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
+	if(!dc.font.set)
+		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
+}
+
+static unsigned int
+textw(const char *text) {
+	return textnw(text, strlen(text)) + dc.font.height;
+}
+
+static void
+togglebar(const char *arg) {
+	if(bpos == BarOff)
+		bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
+	else
+		bpos = BarOff;
+	updatebarpos();
+	arrange();
+}
+
+static void
+updatebarpos(void) {
+	XEvent ev;
+
+	wax = sx;
+	way = sy;
+	wah = sh;
+	waw = sw;
+	switch(bpos) {
+	default:
+		wah -= bh;
+		way += bh;
+		XMoveWindow(dpy, barwin, sx, sy);
+		break;
+	case BarBot:
+		wah -= bh;
+		XMoveWindow(dpy, barwin, sx, sy + wah);
+		break;
+	case BarOff:
+		XMoveWindow(dpy, barwin, sx, sy - bh);
+		break;
+	}
+	XSync(dpy, False);
+	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+}
+
+static void
+attachstack(Client *c) {
+	c->snext = stack;
+	stack = c;
+}
+
+static void
+detachstack(Client *c) {
+	Client **tc;
+
+	for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
+	*tc = c->snext;
+}
+
+static 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);
+	}
+	else
+		XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
+				GrabModeAsync, GrabModeSync, None, None);
+}
+
+static Bool
+isprotodel(Client *c) {
+	int i, n;
+	Atom *protocols;
+	Bool ret = False;
+
+	if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
+		for(i = 0; !ret && i < n; i++)
+			if(protocols[i] == wmatom[WMDelete])
+				ret = True;
+		XFree(protocols);
+	}
+	return ret;
+}
+
+static void
+setclientstate(Client *c, long state) {
+	long data[] = {state, None};
+
+	XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
+			PropModeReplace, (unsigned char *)data, 2);
+}
+
+static int
+xerrordummy(Display *dsply, XErrorEvent *ee) {
+	return 0;
+}
+
+static void
+ban(Client *c) {
+	if(c->isbanned)
+		return;
+	XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
+	c->isbanned = True;
+}
+
+static 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->border;
+	ce.above = None;
+	ce.override_redirect = False;
+	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
+}
+
+static void
+killclient(const char *arg) {
+	XEvent ev;
+
+	if(!sel)
+		return;
+	if(isprotodel(sel)) {
+		ev.type = ClientMessage;
+		ev.xclient.window = 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);
+	}
+	else
+		XKillClient(dpy, sel->win);
+}
+
+static void
+manage(Window w, XWindowAttributes *wa) {
+	unsigned int i;
+	Client *c, *t = NULL;
+	Window trans;
+	Status rettrans;
+	XWindowChanges wc;
+
+	c = emallocz(sizeof(Client));
+	c->tags = emallocz(ntags * sizeof(Bool));
+	c->win = w;
+	c->x = wa->x;
+	c->y = wa->y;
+	c->w = wa->width;
+	c->h = wa->height;
+	c->oldborder = wa->border_width;
+	if(c->w == sw && c->h == sh) {
+		c->x = sx;
+		c->y = sy;
+		c->border = wa->border_width;
+	}
+	else {
+		if(c->x + c->w + 2 * c->border > wax + waw)
+			c->x = wax + waw - c->w - 2 * c->border;
+		if(c->y + c->h + 2 * c->border > way + wah)
+			c->y = way + wah - c->h - 2 * c->border;
+		if(c->x < wax)
+			c->x = wax;
+		if(c->y < way)
+			c->y = way;
+		c->border = BORDERPX;
+	}
+	wc.border_width = c->border;
+	XConfigureWindow(dpy, w, CWBorderWidth, &wc);
+	XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
+	configure(c); /* propagates border_width, if size doesn't change */
+	updatesizehints(c);
+	XSelectInput(dpy, w,
+		StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
+	grabbuttons(c, False);
+	updatetitle(c);
+	if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
+		for(t = clients; t && t->win != trans; t = t->next);
+	if(t)
+		for(i = 0; i < ntags; i++)
+			c->tags[i] = t->tags[i];
+	applyrules(c);
+	if(!c->isfloating)
+		c->isfloating = (rettrans == Success) || c->isfixed;
+	attach(c);
+	attachstack(c);
+	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
+	ban(c);
+	XMapWindow(dpy, c->win);
+	setclientstate(c, NormalState);
+	arrange();
+}
+
+static void
+resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
+	double dx, dy, max, min, ratio;
+	XWindowChanges wc; 
+
+	if(sizehints) {
+		if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
+			dx = (double)(w - c->basew);
+			dy = (double)(h - c->baseh);
+			min = (double)(c->minax) / (double)(c->minay);
+			max = (double)(c->maxax) / (double)(c->maxay);
+			ratio = dx / dy;
+			if(max > 0 && min > 0 && ratio > 0) {
+				if(ratio < min) {
+					dy = (dx * min + dy) / (min * min + 1);
+					dx = dy * min;
+					w = (int)dx + c->basew;
+					h = (int)dy + c->baseh;
+				}
+				else if(ratio > max) {
+					dy = (dx * min + dy) / (max * max + 1);
+					dx = dy * min;
+					w = (int)dx + c->basew;
+					h = (int)dy + c->baseh;
+				}
+			}
+		}
+		if(c->minw && w < c->minw)
+			w = c->minw;
+		if(c->minh && h < c->minh)
+			h = c->minh;
+		if(c->maxw && w > c->maxw)
+			w = c->maxw;
+		if(c->maxh && h > c->maxh)
+			h = c->maxh;
+		if(c->incw)
+			w -= (w - c->basew) % c->incw;
+		if(c->inch)
+			h -= (h - c->baseh) % c->inch;
+	}
+	if(w <= 0 || h <= 0)
+		return;
+	/* offscreen appearance fixes */
+	if(x > sw)
+		x = sw - w - 2 * c->border;
+	if(y > sh)
+		y = sh - h - 2 * c->border;
+	if(x + w + 2 * c->border < sx)
+		x = sx;
+	if(y + h + 2 * c->border < sy)
+		y = sy;
+	if(c->x != x || c->y != y || c->w != w || c->h != 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);
+		configure(c);
+		XSync(dpy, False);
+	}
+}
+
+static void
+unban(Client *c) {
+	if(!c->isbanned)
+		return;
+	XMoveWindow(dpy, c->win, c->x, c->y);
+	c->isbanned = False;
+}
+
+static void
+unmanage(Client *c) {
+	XWindowChanges wc;
+
+	wc.border_width = c->oldborder;
+	/* 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)
+		focus(NULL);
+	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
+	setclientstate(c, WithdrawnState);
+	free(c->tags);
+	free(c);
+	XSync(dpy, False);
+	XSetErrorHandler(xerror);
+	XUngrabServer(dpy);
+	arrange();
+}
+
+static void
+updatesizehints(Client *c) {
+	long msize;
+	XSizeHints size;
+
+	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
+		size.flags = PSize;
+	c->flags = size.flags;
+	if(c->flags & PBaseSize) {
+		c->basew = size.base_width;
+		c->baseh = size.base_height;
+	}
+	else if(c->flags & PMinSize) {
+		c->basew = size.min_width;
+		c->baseh = size.min_height;
+	}
+	else
+		c->basew = c->baseh = 0;
+	if(c->flags & PResizeInc) {
+		c->incw = size.width_inc;
+		c->inch = size.height_inc;
+	}
+	else
+		c->incw = c->inch = 0;
+	if(c->flags & PMaxSize) {
+		c->maxw = size.max_width;
+		c->maxh = size.max_height;
+	}
+	else
+		c->maxw = c->maxh = 0;
+	if(c->flags & PMinSize) {
+		c->minw = size.min_width;
+		c->minh = size.min_height;
+	}
+	else if(c->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;
+	}
+	else
+		c->minax = c->maxax = c->minay = c->maxay = 0;
+	c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
+			&& c->maxw == c->minw && c->maxh == c->minh);
+}
+
+static 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);
+}
+
+static Client *
+getclient(Window w) {
+	Client *c;
+
+	for(c = clients; c && c->win != w; c = c->next);
+	return c;
+}
+
+static void
+movemouse(Client *c) {
+	int x1, y1, ocx, ocy, di, nx, ny;
+	unsigned int dui;
+	Window dummy;
+	XEvent ev;
+
+	ocx = nx = c->x;
+	ocy = ny = c->y;
+	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
+			None, cursor[CurMove], CurrentTime) != GrabSuccess)
+		return;
+	c->ismax = False;
+	XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
+	for(;;) {
+		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);
+			if(abs(wax + nx) < SNAP)
+				nx = wax;
+			else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
+				nx = wax + waw - c->w - 2 * c->border;
+			if(abs(way - ny) < SNAP)
+				ny = way;
+			else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
+				ny = way + wah - c->h - 2 * c->border;
+			resize(c, nx, ny, c->w, c->h, False);
+			break;
+		}
+	}
+}
+
+static void
+resizemouse(Client *c) {
+	int ocx, ocy;
+	int nw, nh;
+	XEvent ev;
+
+	ocx = c->x;
+	ocy = c->y;
+	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
+			None, cursor[CurResize], CurrentTime) != GrabSuccess)
+		return;
+	c->ismax = False;
+	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);
+		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;
+			resize(c, c->x, c->y, nw, nh, True);
+			break;
+		}
+	}
+}
+
+static void
+buttonpress(XEvent *e) {
+	unsigned int i, x;
+	Client *c;
+	XButtonPressedEvent *ev = &e->xbutton;
+
+	if(barwin == ev->window) {
+		x = 0;
+		for(i = 0; i < ntags; i++) {
+			x += textw(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;
+			}
+		}
+		if((ev->x < x + blw) && ev->button == Button1)
+			setlayout(NULL);
+	}
+	else if((c = getclient(ev->window))) {
+		focus(c);
+		if(CLEANMASK(ev->state) != MODKEY)
+			return;
+		if(ev->button == Button1 && (isfloating() || c->isfloating)) {
+			restack();
+			movemouse(c);
+		}
+		else if(ev->button == Button2)
+			zoom(NULL);
+		else if(ev->button == Button3
+		&& (isfloating() || c->isfloating) && !c->isfixed)
+		{
+			restack();
+			resizemouse(c);
+		}
+	}
+}
+
+static void
+configurerequest(XEvent *e) {
+	Client *c;
+	XConfigureRequestEvent *ev = &e->xconfigurerequest;
+	XWindowChanges wc;
+
+	if((c = getclient(ev->window))) {
+		c->ismax = False;
+		if(ev->value_mask & CWBorderWidth)
+			c->border = ev->border_width;
+		if(c->isfixed || c->isfloating || isfloating()) {
+			if(ev->value_mask & CWX)
+				c->x = ev->x;
+			if(ev->value_mask & CWY)
+				c->y = ev->y;
+			if(ev->value_mask & CWWidth)
+				c->w = ev->width;
+			if(ev->value_mask & CWHeight)
+				c->h = ev->height;
+			if((c->x + c->w) > sw && c->isfloating)
+				c->x = sw / 2 - c->w / 2; /* center in x direction */
+			if((c->y + c->h) > sh && c->isfloating)
+				c->y = 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))
+				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);
+}
+
+static void
+configurenotify(XEvent *e) {
+	XConfigureEvent *ev = &e->xconfigure;
+
+	if (ev->window == root && (ev->width != sw || ev->height != sh)) {
+		sw = ev->width;
+		sh = ev->height;
+		XFreePixmap(dpy, dc.drawable);
+		dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
+		XResizeWindow(dpy, barwin, sw, bh);
+		updatebarpos();
+		arrange();
+	}
+}
+
+static void
+destroynotify(XEvent *e) {
+	Client *c;
+	XDestroyWindowEvent *ev = &e->xdestroywindow;
+
+	if((c = getclient(ev->window)))
+		unmanage(c);
+}
+
+static void
+enternotify(XEvent *e) {
+	Client *c;
+	XCrossingEvent *ev = &e->xcrossing;
+
+	if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
+		return;
+	if((c = getclient(ev->window)))
+		focus(c);
+	else if(ev->window == root) {
+		selscreen = True;
+		focus(NULL);
+	}
+}
+
+static void
+expose(XEvent *e) {
+	XExposeEvent *ev = &e->xexpose;
+
+	if(ev->count == 0) {
+		if(barwin == ev->window)
+			drawbar();
+	}
+}
+
+static void
+keypress(XEvent *e) {
+	KEYS
+	unsigned int len = sizeof keys / sizeof keys[0];
+	unsigned int i;
+	KeySym keysym;
+	XKeyEvent *ev = &e->xkey;
+
+	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
+	for(i = 0; i < len; i++)
+		if(keysym == keys[i].keysym
+		&& CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
+		{
+			if(keys[i].func)
+				keys[i].func(keys[i].arg);
+		}
+}
+
+static void
+leavenotify(XEvent *e) {
+	XCrossingEvent *ev = &e->xcrossing;
+
+	if((ev->window == root) && !ev->same_screen) {
+		selscreen = False;
+		focus(NULL);
+	}
+}
+
+static void
+mappingnotify(XEvent *e) {
+	XMappingEvent *ev = &e->xmapping;
+
+	XRefreshKeyboardMapping(ev);
+	if(ev->request == MappingKeyboard)
+		grabkeys();
+}
+
+static void
+maprequest(XEvent *e) {
+	static XWindowAttributes wa;
+	XMapRequestEvent *ev = &e->xmaprequest;
+
+	if(!XGetWindowAttributes(dpy, ev->window, &wa))
+		return;
+	if(wa.override_redirect)
+		return;
+	if(!getclient(ev->window))
+		manage(ev->window, &wa);
+}
+
+static void
+propertynotify(XEvent *e) {
+	Client *c;
+	Window trans;
+	XPropertyEvent *ev = &e->xproperty;
+
+	if(ev->state == PropertyDelete)
+		return; /* ignore */
+	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;
+		}
+		if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
+			updatetitle(c);
+			if(c == sel)
+				drawbar();
+		}
+	}
+}
+
+static void
+unmapnotify(XEvent *e) {
+	Client *c;
+	XUnmapEvent *ev = &e->xunmap;
+
+	if((c = getclient(ev->window)))
+		unmanage(c);
+}
+
+static void
+grabkeys(void) {
+	KEYS
+	unsigned int len = sizeof keys / sizeof keys[0];
+	unsigned int i;
+	KeyCode code;
+
+	XUngrabKey(dpy, AnyKey, AnyModifier, root);
+	for(i = 0; i < len; i++) {
+		code = XKeysymToKeycode(dpy, keys[i].keysym);
+		XGrabKey(dpy, code, keys[i].mod, root, True,
+				GrabModeAsync, GrabModeAsync);
+		XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
+				GrabModeAsync, GrabModeAsync);
+		XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
+				GrabModeAsync, GrabModeAsync);
+		XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
+				GrabModeAsync, GrabModeAsync);
+	}
+}
+
+static unsigned int
+idxoftag(const char *tag) {
+	unsigned int i;
+
+	for(i = 0; i < ntags; i++)
+		if(tags[i] == tag)
+			return i;
+	return 0;
+}
+
+static void
+floating(void) { /* default floating layout */
+	Client *c;
+
+	for(c = clients; c; c = c->next)
+		if(isvisible(c))
+			resize(c, c->x, c->y, c->w, c->h, True);
+}
+
+static void
+applyrules(Client *c) {
+	static char buf[512];
+	unsigned int i, j;
+	regmatch_t tmp;
+	Bool matched = False;
+	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 < nrules; i++)
+		if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
+			c->isfloating = rules[i].isfloating;
+			for(j = 0; regs[i].tagregex && j < ntags; j++) {
+				if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
+					matched = True;
+					c->tags[j] = True;
+				}
+			}
+		}
+	if(ch.res_class)
+		XFree(ch.res_class);
+	if(ch.res_name)
+		XFree(ch.res_name);
+	if(!matched)
+		for(i = 0; i < ntags; i++)
+			c->tags[i] = seltags[i];
+}
+
+static void
+compileregs(void) {
+	unsigned int i;
+	regex_t *reg;
+
+	if(regs)
+		return;
+	nrules = sizeof rules / sizeof rules[0];
+	regs = emallocz(nrules * sizeof(Regs));
+	for(i = 0; i < nrules; 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;
+		}
+	}
+}
+
+static void
+focusnext(const char *arg) {
+	Client *c;
+
+	if(!sel)
+		return;
+	for(c = sel->next; c && !isvisible(c); c = c->next);
+	if(!c)
+		for(c = clients; c && !isvisible(c); c = c->next);
+	if(c) {
+		focus(c);
+		restack();
+	}
+}
+
+static void
+focusprev(const char *arg) {
+	Client *c;
+
+	if(!sel)
+		return;
+	for(c = sel->prev; c && !isvisible(c); c = c->prev);
+	if(!c) {
+		for(c = clients; c && c->next; c = c->next);
+		for(; c && !isvisible(c); c = c->prev);
+	}
+	if(c) {
+		focus(c);
+		restack();
+	}
+}
+
+static void
+initlayouts(void) {
+	unsigned int i, w;
+
+	nlayouts = sizeof layouts / sizeof layouts[0];
+	for(blw = i = 0; i < nlayouts; i++) {
+		w = textw(layouts[i].symbol);
+		if(w > blw)
+			blw = w;
+	}
+}
+
+static Bool
+isfloating(void) {
+	return layouts[ltidx].arrange == floating;
+}
+
+static Bool
+isvisible(Client *c) {
+	unsigned int i;
+
+	for(i = 0; i < ntags; i++)
+		if(c->tags[i] && seltags[i])
+			return True;
+	return False;
+}
+
+static void
+restack(void) {
+	Client *c;
+	XEvent ev;
+	XWindowChanges wc;
+
+	drawbar();
+	if(!sel)
+		return;
+	if(sel->isfloating || isfloating())
+		XRaiseWindow(dpy, sel->win);
+	if(!isfloating()) {
+		wc.stack_mode = Below;
+		wc.sibling = barwin;
+		if(!sel->isfloating) {
+			XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
+			wc.sibling = sel->win;
+		}
+		for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
+			if(c == sel)
+				continue;
+			XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
+			wc.sibling = c->win;
+		}
+	}
+	XSync(dpy, False);
+	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+}
+
+static void
+setlayout(const char *arg) {
+	unsigned int i;
+
+	if(!arg) {
+		if(++ltidx == nlayouts)
+			ltidx = 0;;
+	}
+	else {
+		for(i = 0; i < nlayouts; i++)
+			if(!strcmp(arg, layouts[i].symbol))
+				break;
+		if(i == nlayouts)
+			return;
+		ltidx = i;
+	}
+	if(sel)
+		arrange();
+	else
+		drawbar();
+}
+
+static void
+tag(const char *arg) {
+	unsigned int i;
+
+	if(!sel)
+		return;
+	for(i = 0; i < ntags; i++)
+		sel->tags[i] = arg == NULL;
+	i = idxoftag(arg);
+	if(i >= 0 && i < ntags)
+		sel->tags[i] = True;
+	arrange();
+}
+
+static void
+togglefloating(const char *arg) {
+	if(!sel)
+		return;
+	sel->isfloating = !sel->isfloating;
+	if(sel->isfloating)
+		resize(sel, sel->x, sel->y, sel->w, sel->h, True);
+	arrange();
+}
+
+static void
+togglemax(const char *arg) {
+	XEvent ev;
+
+	if(!sel || (!isfloating() && !sel->isfloating) || sel->isfixed)
+		return;
+	if((sel->ismax = !sel->ismax)) {
+		sel->rx = sel->x;
+		sel->ry = sel->y;
+		sel->rw = sel->w;
+		sel->rh = sel->h;
+		resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
+	}
+	else
+		resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
+	drawbar();
+	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+}
+
+static void
+toggletag(const char *arg) {
+	unsigned int i, j;
+
+	if(!sel)
+		return;
+	i = idxoftag(arg);
+	sel->tags[i] = !sel->tags[i];
+	for(j = 0; j < ntags && !sel->tags[j]; j++);
+	if(j == ntags)
+		sel->tags[i] = True;
+	arrange();
+}
+
+static void
+toggleview(const char *arg) {
+	unsigned int i, j;
+
+	i = idxoftag(arg);
+	seltags[i] = !seltags[i];
+	for(j = 0; j < ntags && !seltags[j]; j++);
+	if(j == ntags)
+		seltags[i] = True; /* cannot toggle last view */
+	arrange();
+}
+
+static void
+view(const char *arg) {
+	unsigned int i;
+
+	for(i = 0; i < ntags; i++)
+		seltags[i] = arg == NULL;
+	i = idxoftag(arg);
+	if(i >= 0 && i < ntags)
+		seltags[i] = True;
+	arrange();
+}
+
+static void
+cleanup(void) {
+	close(STDIN_FILENO);
+	while(stack) {
+		unban(stack);
+		unmanage(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);
+	XDestroyWindow(dpy, barwin);
+	XFreeCursor(dpy, cursor[CurNormal]);
+	XFreeCursor(dpy, cursor[CurResize]);
+	XFreeCursor(dpy, cursor[CurMove]);
+	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
+	XSync(dpy, False);
+	free(seltags);
+}
+
+static long
+getstate(Window w) {
+	int format, status;
+	long result = -1;
+	unsigned char *p = NULL;
+	unsigned long n, extra;
+	Atom real;
+
+	status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
+			&real, &format, &n, &extra, (unsigned char **)&p);
+	if(status != Success)
+		return -1;
+	if(n != 0)
+		result = *p;
+	XFree(p);
+	return result;
+}
+
+static void
+scan(void) {
+	unsigned int i, num;
+	Window *wins, d1, d2;
+	XWindowAttributes wa;
+
+	wins = NULL;
+	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);
+}
+
+static void
+setup(void) {
+	int i, j;
+	unsigned int mask;
+	Window w;
+	XModifierKeymap *modmap;
+	XSetWindowAttributes wa;
+
+	/* 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);
+	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
+			PropModeReplace, (unsigned char *) netatom, NetLast);
+	/* init cursors */
+	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
+	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
+	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
+	/* 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);
+	/* select for events */
+	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
+		| EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
+	wa.cursor = cursor[CurNormal];
+	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
+	XSelectInput(dpy, root, wa.event_mask);
+	grabkeys();
+	compileregs();
+	for(ntags = 0; tags[ntags]; ntags++);
+	seltags = emallocz(sizeof(Bool) * ntags);
+	seltags[0] = True;
+	/* geometry */
+	sx = sy = 0;
+	sw = DisplayWidth(dpy, screen);
+	sh = DisplayHeight(dpy, screen);
+	initstyle();
+	initlayouts();
+	initbar();
+	/* multihead support */
+	selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
+}
+
+/*
+ * Startup Error handler to check if another window manager
+ * is already running.
+ */
+static int
+xerrorstart(Display *dsply, XErrorEvent *ee) {
+	otherwm = True;
+	return -1;
+}
+
+static Bool
+gettextprop(Window w, Atom atom, char *text, unsigned int size) {
+	char **list = NULL;
+	int n;
+	XTextProperty name;
+
+	if(!text || size == 0)
+		return False;
+	text[0] = '\0';
+	XGetTextProperty(dpy, w, &name, atom);
+	if(!name.nitems)
+		return False;
+	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 True;
+}
+
+static void
+quit(const char *arg) {
+	readin = running = False;
+}
+
+/* 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.
+ */
+static 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_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 */
+}
+
+static void
+arrange(void) {
+	Client *c;
+
+	for(c = clients; c; c = c->next)
+		if(isvisible(c))
+			unban(c);
+		else
+			ban(c);
+	layouts[ltidx].arrange();
+	focus(NULL);
+	restack();
+}
+
+static void
+attach(Client *c) {
+	if(clients)
+		clients->prev = c;
+	c->next = clients;
+	clients = c;
+}
+
+static 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;
+}
+
+static void
+focus(Client *c) {
+	if((!c && selscreen) || (c && !isvisible(c)))
+		for(c = stack; c && !isvisible(c); c = c->snext);
+	if(sel && sel != c) {
+		grabbuttons(sel, False);
+		XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
+	}
+	if(c) {
+		detachstack(c);
+		attachstack(c);
+		grabbuttons(c, True);
+	}
+	sel = c;
+	drawbar();
+	if(!selscreen)
+		return;
+	if(c) {
+		XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
+		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
+	}
+	else
+		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
+}
+
+static Bool
+isarrange(void (*func)())
+{
+	return func == layouts[ltidx].arrange;
+}
+
+static Client *
+nexttiled(Client *c) {
+	for(; c && (c->isfloating || !isvisible(c)); c = c->next);
+	return c;
+}
+
+static void
+setmwfact(const char *arg) {
+	double delta;
+
+	if(!isarrange(tile))
+		return;
+	/* arg handling, manipulate mwfact */
+	if(arg == NULL)
+		mwfact = MWFACT;
+	else if(1 == sscanf(arg, "%lf", &delta)) {
+		if(arg[0] != '+' && arg[0] != '-')
+			mwfact = delta;
+		else
+			mwfact += delta;
+		if(mwfact < 0.1)
+			mwfact = 0.1;
+		else if(mwfact > 0.9)
+			mwfact = 0.9;
+	}
+	arrange();
+}
+
+static void
+tile(void) {
+	unsigned int i, n, nx, ny, nw, nh, mw, th;
+	Client *c;
+
+	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
+		n++;
+
+	/* window geoms */
+	mw = (n == 1) ? waw : mwfact * waw;
+	th = (n > 1) ? wah / (n - 1) : 0;
+	if(n > 1 && th < bh)
+		th = wah;
+
+	nx = wax;
+	ny = way;
+	for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++) {
+		c->ismax = False;
+		if(i == 0) { /* master */
+			nw = mw - 2 * c->border;
+			nh = wah - 2 * c->border;
+		}
+		else {  /* tile window */
+			if(i == 1) {
+				ny = way;
+				nx += mw;
+			}
+			nw = waw - mw - 2 * c->border;
+			if(i + 1 == n) /* remainder */
+				nh = (way + wah) - ny - 2 * c->border;
+			else
+				nh = th - 2 * c->border;
+		}
+		resize(c, nx, ny, nw, nh, RESIZEHINTS);
+		if(n > 1 && th != wah)
+			ny += nh + 2 * c->border;
+	}
+}
+
+static void
+zoom(const char *arg) {
+	Client *c;
+
+	if(!sel || !isarrange(tile) || sel->isfloating)
+		return;
+	if((c = sel) == nexttiled(clients))
+		if(!(c = nexttiled(c->next)))
+			return;
+	detach(c);
+	attach(c);
+	focus(c);
+	arrange();
+}
+
+int
+main(int argc, char *argv[]) {
+	char *p;
+	int r, xfd;
+	fd_set rd;
+	XEvent ev;
+
+	if(argc == 2 && !strcmp("-v", argv[1]))
+		eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
+	else if(argc != 1)
+		eprint("usage: dwm [-v]\n");
+	setlocale(LC_CTYPE, "");
+	if(!(dpy = XOpenDisplay(0)))
+		eprint("dwm: cannot open display\n");
+	xfd = ConnectionNumber(dpy);
+	screen = DefaultScreen(dpy);
+	root = RootWindow(dpy, screen);
+	otherwm = False;
+	XSetErrorHandler(xerrorstart);
+	/* this causes an error if some other window manager is running */
+	XSelectInput(dpy, root, SubstructureRedirectMask);
+	XSync(dpy, False);
+	if(otherwm)
+		eprint("dwm: another window manager is already running\n");
+
+	XSync(dpy, False);
+	XSetErrorHandler(NULL);
+	xerrorxlib = XSetErrorHandler(xerror);
+	XSync(dpy, False);
+	setup();
+	drawbar();
+	scan();
+
+	/* main event loop, also reads status text from stdin */
+	XSync(dpy, False);
+	readin = True;
+	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, stext, sizeof stext - 1)) {
+			case -1:
+				strncpy(stext, strerror(errno), sizeof stext - 1);
+				stext[sizeof stext - 1] = '\0';
+				readin = False;
+				break;
+			case 0:
+				strncpy(stext, "EOF", 4);
+				readin = False;
+				break;
+			default:
+				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
+				for(; p >= stext && *p != '\n'; --p);
+				if(p > stext)
+					strncpy(stext, p + 1, sizeof stext);
+			}
+			drawbar();
+		}
+		while(XPending(dpy)) {
+			XNextEvent(dpy, &ev);
+			if(handler[ev.type])
+				(handler[ev.type])(&ev); /* call handler */
+		}
+	}
+	cleanup();
+	XCloseDisplay(dpy);
+	return 0;
+}
diff --git a/dwm.h b/dwm.h
deleted file mode 100644
index 8c9a141..0000000
--- a/dwm.h
+++ /dev/null
@@ -1,147 +0,0 @@
-/* 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.
- *
- * 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.
- *
- * 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.  For each client dwm
- * creates a small title window, which is resized whenever the (_NET_)WM_NAME
- * properties are updated or the client is moved/resized.
- *
- * Keys and tagging rules are organized as arrays and defined in the config.h
- * file. These arrays are kept static in event.o and tag.o respectively,
- * because no other part of dwm needs access to them.  The current layout is
- * represented by the lt pointer.
- *
- * To understand everything else, start reading main.c:main().
- */
-
-#include "config.h"
-#include <X11/Xlib.h>
-
-/* mask shorthands, used in event.c and client.c */
-#define BUTTONMASK		(ButtonPressMask | ButtonReleaseMask)
-
-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 */
-
-typedef struct Client Client;
-struct Client {
-	char name[256];
-	int x, y, w, h;
-	int rx, ry, rw, rh; /* revert geometry */
-	int basew, baseh, incw, inch, maxw, maxh, minw, minh;
-	int minax, maxax, minay, maxay;
-	long flags; 
-	unsigned int border, oldborder;
-	Bool isbanned, isfixed, ismax, isfloating;
-	Bool *tags;
-	Client *next;
-	Client *prev;
-	Client *snext;
-	Window win;
-};
-
-typedef struct {
-	int x, y, w, h;
-	unsigned long norm[ColLast];
-	unsigned long sel[ColLast];
-	Drawable drawable;
-	GC gc;
-	struct {
-		int ascent;
-		int descent;
-		int height;
-		XFontSet set;
-		XFontStruct *xfont;
-	} font;
-} DC; /* draw context */
-
-extern const char *tags[];			/* all tags */
-extern char stext[256];				/* status text */
-extern int screen, sx, sy, sw, sh;		/* screen geometry */
-extern int wax, way, wah, waw;			/* windowarea geometry */
-extern unsigned int bh, blw, bpos;		/* bar height, bar layout label width, bar position */
-extern unsigned int ntags, numlockmask;		/* number of tags, numlock mask */
-extern void (*handler[LASTEvent])(XEvent *);	/* event handler */
-extern Atom wmatom[WMLast], netatom[NetLast];
-extern Bool selscreen, *seltags;		/* seltags is array of Bool */
-extern Client *clients, *sel, *stack;		/* global client list and stack */
-extern Cursor cursor[CurLast];
-extern DC dc;					/* global draw context */
-extern Display *dpy;
-extern Window root, barwin;
-
-/* bar.c */
-void drawbar(void);			/* draw the bar */
-void initbar(void);			/* initializes the bar */
-void initstyle(void);			/* initializes colors and font */
-unsigned int textw(const char *text);	/* return the width of text in px*/
-void togglebar(const char *arg);	/* shows/hides the bar */
-void updatebarpos(void);		/* updates the bar position */
-
-/* client.c */
-void attach(Client *c);			/* attaches c to global client list */
-void ban(Client *c);			/* bans c */
-void configure(Client *c);		/* send synthetic configure event */
-void detach(Client *c);			/* detaches c from global client list */
-void focus(Client *c);			/* focus c if visible && !NULL, or focus top visible */
-void killclient(const char *arg);	/* kill sel  nicely */
-void manage(Window w, XWindowAttributes *wa);	/* manage new client */
-void resize(Client *c, int x, int y,
-		int w, int h, Bool sizehints);	/* resize with given coordinates c*/
-void unban(Client *c);			/* unbans c */
-void unmanage(Client *c);		/* unmanage c */
-void updatesizehints(Client *c);	/* update the size hint variables of c */
-void updatetitle(Client *c);		/* update the name of c */
-
-/* event.c */
-void grabkeys(void);			/* grab all keys defined in config.h */
-
-/* main.c */
-Bool gettextprop(Window w, Atom atom,
-		char *text, unsigned int size); /* return text property, UTF-8 compliant */
-void quit(const char *arg);			/* quit dwm nicely */
-int xerror(Display *dsply, XErrorEvent *ee);	/* dwm's X error handler */
-
-/* screen.c */
-void applyrules(Client *c);		/* applies rules to c */
-void arrange(void);			/* arranges all windows depending on the layout in use */
-void compileregs(void);			/* initialize regexps of rules defined in config.h */
-void focusnext(const char *arg);	/* focuses next visible client */
-void focusprev(const char *arg);	/* focuses prev visible client */
-const char *getsymbol(void);		/* returns symbol of enabled layout */
-void initlayouts(void);			/* initialize layout array */
-Bool isarrange(void (*func)());		/* returns True if func is the layout function in use */
-Bool isfloating(void);			/* returns True if floating layout is enabled */
-Bool isvisible(Client *c);		/* returns True if client is visible */
-Client *nexttiled(Client *c);		/* returns tiled successor of c */
-void restack(void);			/* restores z layers of all clients */
-void setlayout(const char *arg);	/* sets layout, NULL means next layout */
-void tag(const char *arg);		/* tags sel with arg's index */
-void togglefloating(const char *arg);	/* toggles sel between floating/tiled state */
-void togglemax(const char *arg);	/* toggles maximization of floating client */
-void toggletag(const char *arg);	/* toggles sel tags with arg's index */
-void toggleview(const char *arg);	/* toggles the tag with arg's index (in)visible */
-void view(const char *arg);		/* views the tag with arg's index */
-
-/* util.c */
-void *emallocz(unsigned int size);	/* allocates zero-initialized memory, exits on error */
-void eprint(const char *errstr, ...);	/* prints errstr and exits with 1 */
-void spawn(const char *arg);		/* forks a new subprocess with arg's cmd */
diff --git a/event.c b/event.c
deleted file mode 100644
index 16201f3..0000000
--- a/event.c
+++ /dev/null
@@ -1,375 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "dwm.h"
-#include <stdlib.h>
-#include <X11/keysym.h>
-#include <X11/Xatom.h>
-#include <X11/Xutil.h>
-
-/* static */
-
-typedef struct {
-	unsigned long mod;
-	KeySym keysym;
-	void (*func)(const char *arg);
-	const char *arg;
-} Key;
-
-#define CLEANMASK(mask)		(mask & ~(numlockmask | LockMask))
-#define MOUSEMASK		(BUTTONMASK | PointerMotionMask)
-
-static Client *
-getclient(Window w) {
-	Client *c;
-
-	for(c = clients; c && c->win != w; c = c->next);
-	return c;
-}
-
-static void
-movemouse(Client *c) {
-	int x1, y1, ocx, ocy, di, nx, ny;
-	unsigned int dui;
-	Window dummy;
-	XEvent ev;
-
-	ocx = nx = c->x;
-	ocy = ny = c->y;
-	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
-			None, cursor[CurMove], CurrentTime) != GrabSuccess)
-		return;
-	c->ismax = False;
-	XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
-	for(;;) {
-		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);
-			if(abs(wax + nx) < SNAP)
-				nx = wax;
-			else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
-				nx = wax + waw - c->w - 2 * c->border;
-			if(abs(way - ny) < SNAP)
-				ny = way;
-			else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
-				ny = way + wah - c->h - 2 * c->border;
-			resize(c, nx, ny, c->w, c->h, False);
-			break;
-		}
-	}
-}
-
-static void
-resizemouse(Client *c) {
-	int ocx, ocy;
-	int nw, nh;
-	XEvent ev;
-
-	ocx = c->x;
-	ocy = c->y;
-	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
-			None, cursor[CurResize], CurrentTime) != GrabSuccess)
-		return;
-	c->ismax = False;
-	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);
-		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;
-			resize(c, c->x, c->y, nw, nh, True);
-			break;
-		}
-	}
-}
-
-static void
-buttonpress(XEvent *e) {
-	unsigned int i, x;
-	Client *c;
-	XButtonPressedEvent *ev = &e->xbutton;
-
-	if(barwin == ev->window) {
-		x = 0;
-		for(i = 0; i < ntags; i++) {
-			x += textw(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;
-			}
-		}
-		if((ev->x < x + blw) && ev->button == Button1)
-			setlayout(NULL);
-	}
-	else if((c = getclient(ev->window))) {
-		focus(c);
-		if(CLEANMASK(ev->state) != MODKEY)
-			return;
-		if(ev->button == Button1 && (isfloating() || c->isfloating)) {
-			restack();
-			movemouse(c);
-		}
-		else if(ev->button == Button2)
-			zoom(NULL);
-		else if(ev->button == Button3
-		&& (isfloating() || c->isfloating) && !c->isfixed)
-		{
-			restack();
-			resizemouse(c);
-		}
-	}
-}
-
-static void
-configurerequest(XEvent *e) {
-	Client *c;
-	XConfigureRequestEvent *ev = &e->xconfigurerequest;
-	XWindowChanges wc;
-
-	if((c = getclient(ev->window))) {
-		c->ismax = False;
-		if(ev->value_mask & CWBorderWidth)
-			c->border = ev->border_width;
-		if(c->isfixed || c->isfloating || isfloating()) {
-			if(ev->value_mask & CWX)
-				c->x = ev->x;
-			if(ev->value_mask & CWY)
-				c->y = ev->y;
-			if(ev->value_mask & CWWidth)
-				c->w = ev->width;
-			if(ev->value_mask & CWHeight)
-				c->h = ev->height;
-			if((c->x + c->w) > sw && c->isfloating)
-				c->x = sw / 2 - c->w / 2; /* center in x direction */
-			if((c->y + c->h) > sh && c->isfloating)
-				c->y = 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))
-				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);
-}
-
-static void
-configurenotify(XEvent *e) {
-	XConfigureEvent *ev = &e->xconfigure;
-
-	if (ev->window == root && (ev->width != sw || ev->height != sh)) {
-		sw = ev->width;
-		sh = ev->height;
-		XFreePixmap(dpy, dc.drawable);
-		dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
-		XResizeWindow(dpy, barwin, sw, bh);
-		updatebarpos();
-		arrange();
-	}
-}
-
-static void
-destroynotify(XEvent *e) {
-	Client *c;
-	XDestroyWindowEvent *ev = &e->xdestroywindow;
-
-	if((c = getclient(ev->window)))
-		unmanage(c);
-}
-
-static void
-enternotify(XEvent *e) {
-	Client *c;
-	XCrossingEvent *ev = &e->xcrossing;
-
-	if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
-		return;
-	if((c = getclient(ev->window)))
-		focus(c);
-	else if(ev->window == root) {
-		selscreen = True;
-		focus(NULL);
-	}
-}
-
-static void
-expose(XEvent *e) {
-	XExposeEvent *ev = &e->xexpose;
-
-	if(ev->count == 0) {
-		if(barwin == ev->window)
-			drawbar();
-	}
-}
-
-static void
-keypress(XEvent *e) {
-	KEYS
-	unsigned int len = sizeof keys / sizeof keys[0];
-	unsigned int i;
-	KeySym keysym;
-	XKeyEvent *ev = &e->xkey;
-
-	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
-	for(i = 0; i < len; i++)
-		if(keysym == keys[i].keysym
-		&& CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
-		{
-			if(keys[i].func)
-				keys[i].func(keys[i].arg);
-		}
-}
-
-static void
-leavenotify(XEvent *e) {
-	XCrossingEvent *ev = &e->xcrossing;
-
-	if((ev->window == root) && !ev->same_screen) {
-		selscreen = False;
-		focus(NULL);
-	}
-}
-
-static void
-mappingnotify(XEvent *e) {
-	XMappingEvent *ev = &e->xmapping;
-
-	XRefreshKeyboardMapping(ev);
-	if(ev->request == MappingKeyboard)
-		grabkeys();
-}
-
-static void
-maprequest(XEvent *e) {
-	static XWindowAttributes wa;
-	XMapRequestEvent *ev = &e->xmaprequest;
-
-	if(!XGetWindowAttributes(dpy, ev->window, &wa))
-		return;
-	if(wa.override_redirect)
-		return;
-	if(!getclient(ev->window))
-		manage(ev->window, &wa);
-}
-
-static void
-propertynotify(XEvent *e) {
-	Client *c;
-	Window trans;
-	XPropertyEvent *ev = &e->xproperty;
-
-	if(ev->state == PropertyDelete)
-		return; /* ignore */
-	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;
-		}
-		if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
-			updatetitle(c);
-			if(c == sel)
-				drawbar();
-		}
-	}
-}
-
-static void
-unmapnotify(XEvent *e) {
-	Client *c;
-	XUnmapEvent *ev = &e->xunmap;
-
-	if((c = getclient(ev->window)))
-		unmanage(c);
-}
-
-/* extern */
-
-void (*handler[LASTEvent]) (XEvent *) = {
-	[ButtonPress] = buttonpress,
-	[ConfigureRequest] = configurerequest,
-	[ConfigureNotify] = configurenotify,
-	[DestroyNotify] = destroynotify,
-	[EnterNotify] = enternotify,
-	[LeaveNotify] = leavenotify,
-	[Expose] = expose,
-	[KeyPress] = keypress,
-	[MappingNotify] = mappingnotify,
-	[MapRequest] = maprequest,
-	[PropertyNotify] = propertynotify,
-	[UnmapNotify] = unmapnotify
-};
-
-void
-grabkeys(void) {
-	KEYS
-	unsigned int len = sizeof keys / sizeof keys[0];
-	unsigned int i;
-	KeyCode code;
-
-	XUngrabKey(dpy, AnyKey, AnyModifier, root);
-	for(i = 0; i < len; i++) {
-		code = XKeysymToKeycode(dpy, keys[i].keysym);
-		XGrabKey(dpy, code, keys[i].mod, root, True,
-				GrabModeAsync, GrabModeAsync);
-		XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
-				GrabModeAsync, GrabModeAsync);
-		XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
-				GrabModeAsync, GrabModeAsync);
-		XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
-				GrabModeAsync, GrabModeAsync);
-	}
-}
diff --git a/main.c b/main.c
deleted file mode 100644
index 1e1ad4c..0000000
--- a/main.c
+++ /dev/null
@@ -1,296 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "dwm.h"
-#include <errno.h>
-#include <locale.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/select.h>
-#include <X11/cursorfont.h>
-#include <X11/keysym.h>
-#include <X11/Xatom.h>
-#include <X11/Xproto.h>
-#include <X11/Xutil.h>
-
-/* extern */
-
-char stext[256];
-int screen, sx, sy, sw, sh, wax, way, waw, wah;
-unsigned int ntags;
-unsigned int numlockmask = 0;
-Atom wmatom[WMLast], netatom[NetLast];
-Bool *seltags;
-Bool selscreen = True;
-Client *clients = NULL;
-Client *sel = NULL;
-Client *stack = NULL;
-Cursor cursor[CurLast];
-Display *dpy;
-Window root;
-
-/* static */
-
-static int (*xerrorxlib)(Display *, XErrorEvent *);
-static Bool otherwm, readin;
-static Bool running = True;
-
-static void
-cleanup(void) {
-	close(STDIN_FILENO);
-	while(stack) {
-		unban(stack);
-		unmanage(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);
-	XDestroyWindow(dpy, barwin);
-	XFreeCursor(dpy, cursor[CurNormal]);
-	XFreeCursor(dpy, cursor[CurResize]);
-	XFreeCursor(dpy, cursor[CurMove]);
-	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
-	XSync(dpy, False);
-	free(seltags);
-}
-
-static long
-getstate(Window w) {
-	int format, status;
-	long result = -1;
-	unsigned char *p = NULL;
-	unsigned long n, extra;
-	Atom real;
-
-	status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
-			&real, &format, &n, &extra, (unsigned char **)&p);
-	if(status != Success)
-		return -1;
-	if(n != 0)
-		result = *p;
-	XFree(p);
-	return result;
-}
-
-static void
-scan(void) {
-	unsigned int i, num;
-	Window *wins, d1, d2;
-	XWindowAttributes wa;
-
-	wins = NULL;
-	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);
-}
-
-static void
-setup(void) {
-	int i, j;
-	unsigned int mask;
-	Window w;
-	XModifierKeymap *modmap;
-	XSetWindowAttributes wa;
-
-	/* 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);
-	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
-			PropModeReplace, (unsigned char *) netatom, NetLast);
-	/* init cursors */
-	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
-	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
-	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
-	/* 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);
-	/* select for events */
-	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
-		| EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
-	wa.cursor = cursor[CurNormal];
-	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
-	XSelectInput(dpy, root, wa.event_mask);
-	grabkeys();
-	compileregs();
-	for(ntags = 0; tags[ntags]; ntags++);
-	seltags = emallocz(sizeof(Bool) * ntags);
-	seltags[0] = True;
-	/* geometry */
-	sx = sy = 0;
-	sw = DisplayWidth(dpy, screen);
-	sh = DisplayHeight(dpy, screen);
-	initstyle();
-	initlayouts();
-	initbar();
-	/* multihead support */
-	selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
-}
-
-/*
- * Startup Error handler to check if another window manager
- * is already running.
- */
-static int
-xerrorstart(Display *dsply, XErrorEvent *ee) {
-	otherwm = True;
-	return -1;
-}
-
-/* extern */
-
-Bool
-gettextprop(Window w, Atom atom, char *text, unsigned int size) {
-	char **list = NULL;
-	int n;
-	XTextProperty name;
-
-	if(!text || size == 0)
-		return False;
-	text[0] = '\0';
-	XGetTextProperty(dpy, w, &name, atom);
-	if(!name.nitems)
-		return False;
-	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 True;
-}
-
-void
-quit(const char *arg) {
-	readin = running = False;
-}
-
-/* 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_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
-main(int argc, char *argv[]) {
-	char *p;
-	int r, xfd;
-	fd_set rd;
-	XEvent ev;
-
-	if(argc == 2 && !strcmp("-v", argv[1]))
-		eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
-	else if(argc != 1)
-		eprint("usage: dwm [-v]\n");
-	setlocale(LC_CTYPE, "");
-	if(!(dpy = XOpenDisplay(0)))
-		eprint("dwm: cannot open display\n");
-	xfd = ConnectionNumber(dpy);
-	screen = DefaultScreen(dpy);
-	root = RootWindow(dpy, screen);
-	otherwm = False;
-	XSetErrorHandler(xerrorstart);
-	/* this causes an error if some other window manager is running */
-	XSelectInput(dpy, root, SubstructureRedirectMask);
-	XSync(dpy, False);
-	if(otherwm)
-		eprint("dwm: another window manager is already running\n");
-
-	XSync(dpy, False);
-	XSetErrorHandler(NULL);
-	xerrorxlib = XSetErrorHandler(xerror);
-	XSync(dpy, False);
-	setup();
-	drawbar();
-	scan();
-
-	/* main event loop, also reads status text from stdin */
-	XSync(dpy, False);
-	readin = True;
-	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, stext, sizeof stext - 1)) {
-			case -1:
-				strncpy(stext, strerror(errno), sizeof stext - 1);
-				stext[sizeof stext - 1] = '\0';
-				readin = False;
-				break;
-			case 0:
-				strncpy(stext, "EOF", 4);
-				readin = False;
-				break;
-			default:
-				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
-				for(; p >= stext && *p != '\n'; --p);
-				if(p > stext)
-					strncpy(stext, p + 1, sizeof stext);
-			}
-			drawbar();
-		}
-		while(XPending(dpy)) {
-			XNextEvent(dpy, &ev);
-			if(handler[ev.type])
-				(handler[ev.type])(&ev); /* call handler */
-		}
-	}
-	cleanup();
-	XCloseDisplay(dpy);
-	return 0;
-}
diff --git a/screen.c b/screen.c
deleted file mode 100644
index 142ed56..0000000
--- a/screen.c
+++ /dev/null
@@ -1,340 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "dwm.h"
-#include <regex.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <X11/Xutil.h>
-
-/* static */
-
-typedef struct {
-	const char *symbol;
-	void (*arrange)(void);
-} Layout;
-
-typedef struct {
-	const char *prop;
-	const char *tags;
-	Bool isfloating;
-} Rule;
-
-typedef struct {
-	regex_t *propregex;
-	regex_t *tagregex;
-} Regs;
-
-TAGS
-RULES
-
-static unsigned int nrules = 0;
-static unsigned int nlayouts = 0;
-static unsigned int ltidx = 0; /* default */
-static Regs *regs = NULL;
-
-static unsigned int
-idxoftag(const char *tag) {
-	unsigned int i;
-
-	for(i = 0; i < ntags; i++)
-		if(tags[i] == tag)
-			return i;
-	return 0;
-}
-
-static void
-floating(void) { /* default floating layout */
-	Client *c;
-
-	for(c = clients; c; c = c->next)
-		if(isvisible(c))
-			resize(c, c->x, c->y, c->w, c->h, True);
-}
-
-LAYOUTS
-
-/* extern */
-
-unsigned int blw = 0;
-
-void
-applyrules(Client *c) {
-	static char buf[512];
-	unsigned int i, j;
-	regmatch_t tmp;
-	Bool matched = False;
-	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 < nrules; i++)
-		if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
-			c->isfloating = rules[i].isfloating;
-			for(j = 0; regs[i].tagregex && j < ntags; j++) {
-				if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
-					matched = True;
-					c->tags[j] = True;
-				}
-			}
-		}
-	if(ch.res_class)
-		XFree(ch.res_class);
-	if(ch.res_name)
-		XFree(ch.res_name);
-	if(!matched)
-		for(i = 0; i < ntags; i++)
-			c->tags[i] = seltags[i];
-}
-
-void
-arrange(void) {
-	Client *c;
-
-	for(c = clients; c; c = c->next)
-		if(isvisible(c))
-			unban(c);
-		else
-			ban(c);
-	layouts[ltidx].arrange();
-	focus(NULL);
-	restack();
-}
-
-void
-compileregs(void) {
-	unsigned int i;
-	regex_t *reg;
-
-	if(regs)
-		return;
-	nrules = sizeof rules / sizeof rules[0];
-	regs = emallocz(nrules * sizeof(Regs));
-	for(i = 0; i < nrules; 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;
-		}
-	}
-}
-
-void
-focusnext(const char *arg) {
-	Client *c;
-
-	if(!sel)
-		return;
-	for(c = sel->next; c && !isvisible(c); c = c->next);
-	if(!c)
-		for(c = clients; c && !isvisible(c); c = c->next);
-	if(c) {
-		focus(c);
-		restack();
-	}
-}
-
-void
-focusprev(const char *arg) {
-	Client *c;
-
-	if(!sel)
-		return;
-	for(c = sel->prev; c && !isvisible(c); c = c->prev);
-	if(!c) {
-		for(c = clients; c && c->next; c = c->next);
-		for(; c && !isvisible(c); c = c->prev);
-	}
-	if(c) {
-		focus(c);
-		restack();
-	}
-}
-
-const char *
-getsymbol(void)
-{
-	return layouts[ltidx].symbol;
-}
-
-void
-initlayouts(void) {
-	unsigned int i, w;
-
-	nlayouts = sizeof layouts / sizeof layouts[0];
-	for(blw = i = 0; i < nlayouts; i++) {
-		w = textw(layouts[i].symbol);
-		if(w > blw)
-			blw = w;
-	}
-}
-
-Bool
-isfloating(void) {
-	return layouts[ltidx].arrange == floating;
-}
-
-Bool
-isarrange(void (*func)())
-{
-	return func == layouts[ltidx].arrange;
-}
-
-Bool
-isvisible(Client *c) {
-	unsigned int i;
-
-	for(i = 0; i < ntags; i++)
-		if(c->tags[i] && seltags[i])
-			return True;
-	return False;
-}
-
-Client *
-nexttiled(Client *c) {
-	for(; c && (c->isfloating || !isvisible(c)); c = c->next);
-	return c;
-}
-
-void
-restack(void) {
-	Client *c;
-	XEvent ev;
-	XWindowChanges wc;
-
-	drawbar();
-	if(!sel)
-		return;
-	if(sel->isfloating || isfloating())
-		XRaiseWindow(dpy, sel->win);
-	if(!isfloating()) {
-		wc.stack_mode = Below;
-		wc.sibling = barwin;
-		if(!sel->isfloating) {
-			XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
-			wc.sibling = sel->win;
-		}
-		for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
-			if(c == sel)
-				continue;
-			XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
-			wc.sibling = c->win;
-		}
-	}
-	XSync(dpy, False);
-	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
-}
-
-void
-setlayout(const char *arg) {
-	unsigned int i;
-
-	if(!arg) {
-		if(++ltidx == nlayouts)
-			ltidx = 0;;
-	}
-	else {
-		for(i = 0; i < nlayouts; i++)
-			if(!strcmp(arg, layouts[i].symbol))
-				break;
-		if(i == nlayouts)
-			return;
-		ltidx = i;
-	}
-	if(sel)
-		arrange();
-	else
-		drawbar();
-}
-
-void
-tag(const char *arg) {
-	unsigned int i;
-
-	if(!sel)
-		return;
-	for(i = 0; i < ntags; i++)
-		sel->tags[i] = arg == NULL;
-	i = idxoftag(arg);
-	if(i >= 0 && i < ntags)
-		sel->tags[i] = True;
-	arrange();
-}
-
-void
-togglefloating(const char *arg) {
-	if(!sel)
-		return;
-	sel->isfloating = !sel->isfloating;
-	if(sel->isfloating)
-		resize(sel, sel->x, sel->y, sel->w, sel->h, True);
-	arrange();
-}
-
-void
-togglemax(const char *arg) {
-	XEvent ev;
-
-	if(!sel || (!isfloating() && !sel->isfloating) || sel->isfixed)
-		return;
-	if((sel->ismax = !sel->ismax)) {
-		sel->rx = sel->x;
-		sel->ry = sel->y;
-		sel->rw = sel->w;
-		sel->rh = sel->h;
-		resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
-	}
-	else
-		resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
-	drawbar();
-	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
-}
-
-void
-toggletag(const char *arg) {
-	unsigned int i, j;
-
-	if(!sel)
-		return;
-	i = idxoftag(arg);
-	sel->tags[i] = !sel->tags[i];
-	for(j = 0; j < ntags && !sel->tags[j]; j++);
-	if(j == ntags)
-		sel->tags[i] = True;
-	arrange();
-}
-
-void
-toggleview(const char *arg) {
-	unsigned int i, j;
-
-	i = idxoftag(arg);
-	seltags[i] = !seltags[i];
-	for(j = 0; j < ntags && !seltags[j]; j++);
-	if(j == ntags)
-		seltags[i] = True; /* cannot toggle last view */
-	arrange();
-}
-
-void
-view(const char *arg) {
-	unsigned int i;
-
-	for(i = 0; i < ntags; i++)
-		seltags[i] = arg == NULL;
-	i = idxoftag(arg);
-	if(i >= 0 && i < ntags)
-		seltags[i] = True;
-	arrange();
-}
diff --git a/tile.c b/tile.c
deleted file mode 100644
index 56a06d3..0000000
--- a/tile.c
+++ /dev/null
@@ -1,85 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "dwm.h"
-#include <stdio.h>
-
-/* static */
-
-static double mwfact = MWFACT;
-
-/* extern */
-
-void
-setmwfact(const char *arg) {
-	double delta;
-
-	if(!isarrange(tile))
-		return;
-	/* arg handling, manipulate mwfact */
-	if(arg == NULL)
-		mwfact = MWFACT;
-	else if(1 == sscanf(arg, "%lf", &delta)) {
-		if(arg[0] != '+' && arg[0] != '-')
-			mwfact = delta;
-		else
-			mwfact += delta;
-		if(mwfact < 0.1)
-			mwfact = 0.1;
-		else if(mwfact > 0.9)
-			mwfact = 0.9;
-	}
-	arrange();
-}
-
-void
-tile(void) {
-	unsigned int i, n, nx, ny, nw, nh, mw, th;
-	Client *c;
-
-	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
-		n++;
-
-	/* window geoms */
-	mw = (n == 1) ? waw : mwfact * waw;
-	th = (n > 1) ? wah / (n - 1) : 0;
-	if(n > 1 && th < bh)
-		th = wah;
-
-	nx = wax;
-	ny = way;
-	for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++) {
-		c->ismax = False;
-		if(i == 0) { /* master */
-			nw = mw - 2 * c->border;
-			nh = wah - 2 * c->border;
-		}
-		else {  /* tile window */
-			if(i == 1) {
-				ny = way;
-				nx += mw;
-			}
-			nw = waw - mw - 2 * c->border;
-			if(i + 1 == n) /* remainder */
-				nh = (way + wah) - ny - 2 * c->border;
-			else
-				nh = th - 2 * c->border;
-		}
-		resize(c, nx, ny, nw, nh, RESIZEHINTS);
-		if(n > 1 && th != wah)
-			ny += nh + 2 * c->border;
-	}
-}
-
-void
-zoom(const char *arg) {
-	Client *c;
-
-	if(!sel || !isarrange(tile) || sel->isfloating)
-		return;
-	if((c = sel) == nexttiled(clients))
-		if(!(c = nexttiled(c->next)))
-			return;
-	detach(c);
-	attach(c);
-	focus(c);
-	arrange();
-}
diff --git a/tile.h b/tile.h
deleted file mode 100644
index 38e0c76..0000000
--- a/tile.h
+++ /dev/null
@@ -1,6 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-
-/* tile.c */
-void setmwfact(const char *arg);	/* sets master width factor */
-void tile(void);			/* arranges all windows tiled */
-void zoom(const char *arg);		/* zooms the focused client to master area, arg is ignored */
diff --git a/util.c b/util.c
deleted file mode 100644
index d39d73c..0000000
--- a/util.c
+++ /dev/null
@@ -1,52 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "dwm.h"
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-/* extern */
-
-void *
-emallocz(unsigned int size) {
-	void *res = calloc(1, size);
-
-	if(!res)
-		eprint("fatal: could not malloc() %u bytes\n", size);
-	return res;
-}
-
-void
-eprint(const char *errstr, ...) {
-	va_list ap;
-
-	va_start(ap, errstr);
-	vfprintf(stderr, errstr, ap);
-	va_end(ap);
-	exit(EXIT_FAILURE);
-}
-
-void
-spawn(const char *arg) {
-	static char *shell = NULL;
-
-	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. */
-	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);
-			perr
/* Based on https://github.com/antirez/kilo
 *
 * -----------------------------------------------------------------------
 *
 * Copyright (C) 2016 Salvatore Sanfilippo <antirez at gmail dot com>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *  *  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *  *  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#define KILO_VERSION "0.0.1"

#ifdef __linux__
#define _POSIX_C_SOURCE 200809L
#endif

#include <assert.h>
#include <ncurses.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#include <fcntl.h>

#include "lua.h"

/* Syntax highlight types */
#define HL_NORMAL 0
#define HL_NONPRINT 1
#define HL_COMMENT 2   /* Single line comment. */
#define HL_MLCOMMENT 3 /* Multi-line comment. */
#define HL_KEYWORD1 4
#define HL_KEYWORD2 5
#define HL_STRING 6
#define HL_NUMBER 7
#define HL_MATCH 8      /* Search match. */

struct editorSyntax {
    char **keywords;
    char singleline_comment_start[2];
    char *multiline_comment_start;
    char *multiline_comment_end;
};

/* This structure represents a single line of the file we are editing. */
typedef struct erow {
    int idx;            /* Row index in the file, zero-based. */
    int size;           /* Size of the row, excluding the null term. */
    int rsize;          /* Size of the rendered row. */
    char *chars;        /* Row content. */
    char *render;       /* Row content "rendered" for screen (for TABs). */
    unsigned char *hl;  /* Syntax highlight type for each character in render.*/
    int hl_oc;          /* Row had open comment at end in last syntax highlight
                           check. */
} erow;

typedef struct hlcolor {
    int r,g,b;
} hlcolor;

struct editorConfig {
    int cx,cy;  /* Cursor x and y position in characters */
    int rowoff;     /* Offset of row displayed. */
    int coloff;     /* Offset of column displayed. */
    int numrows;    /* Number of rows */
    erow *row;      /* Rows */
    int dirty;      /* File modified but not saved. */
    char *filename; /* Currently open filename */
    char statusmsg[80];
    time_t statusmsg_time;
    struct editorSyntax *syntax;    /* Current syntax highlight, or NULL. */
};

static struct editorConfig E;

enum KEY_ACTION {
        KEY_NULL = 0,
        CTRL_C = 3,
        CTRL_D = 4,
        CTRL_E = 5,
        CTRL_F = 6,
        CTRL_G = 7,
        CTRL_H = 8,
        TAB = 9,
        ENTER = 10,
        CTRL_L = 12,
        CTRL_Q = 17,
        CTRL_S = 19,
        CTRL_U = 21,
        CTRL_X = 24,
        ESC = 27,
};

static void editorSetStatusMessage(const char *fmt, ...);

/* =========================== Syntax highlights DB =========================
 *
 * In order to add a new syntax, define two arrays with a list of file name
 * matches and keywords. The file name matches are used in order to match
 * a given syntax with a given file name: if a match pattern starts with a
 * dot, it is matched as the last past of the filename, for example ".c".
 * Otherwise the pattern is just searched inside the filenme, like "Makefile").
 *
 * The list of keywords to highlight is just a list of words, however if they
 * a trailing '|' character is added at the end, they are highlighted in
 * a different color, so that you can have two different sets of keywords.
 *
 * Finally add a stanza in the HLDB global variable with two two arrays
 * of strings.
 *
 * The characters for single and multi line comments must be exactly two
 * and must be provided as well (see the C language example).
 *
 * There is no support to highlight patterns currently. */

/* Lua */
char *Lua_HL_keywords[] = {
  /* keywords */
  "do", "end", "function", "return", "require", "local"
  "if", "then", "else", "elseif",
  "while", "for", "repeat", "until", "break",
  "and", "or", "not", "in",

  /* types */
  "nil", "false", "true",

  NULL
};

/* Here we define an array of syntax highlights by extensions, keywords,
 * comments delimiters. */
struct editorSyntax HLDB[] = {
    {
        Lua_HL_keywords,
        "--",  // line comment
        "--[[",  // multiline comment start
        "--]]"  // multline comment stop
    }
};

#define HLDB_ENTRIES (sizeof(HLDB)/sizeof(HLDB[0]))

/* ====================== Syntax highlight color scheme  ==================== */

static int is_separator(int c) {
    return c == '\0' || isspace(c) || strchr(",.()+-/*=~%[];",c) != NULL;
}

static int starts_with(const char* s, const char* prefix) {
    return strncmp(prefix, s, strlen(prefix)) == 0;
}

/* Return true if the specified row last char is part of a multi line comment
 * that starts at this row or at one before, and does not end at the end
 * of the row but spawns to the next row. */
static int editorRowHasOpenComment(erow *row, char *mce) {
    if (row->hl && row->rsize && row->hl[row->rsize-1] == HL_MLCOMMENT &&
        (row->rsize < strlen(mce) || strcmp(&row->render[row->rsize-strlen(mce)], mce) != 0)) return 1;
    return 0;
}

/* Set every byte of row->hl (that corresponds to every character in the line)
 * to the right syntax highlight type (HL_* defines). */
static void editorUpdateSyntax(erow *row) {
//?     mvprintw(row->idx, 0, "i:%d|", row->idx);
    row->hl = realloc(row->hl,row->rsize);
    memset(row->hl,HL_NORMAL,row->rsize);

    if (E.syntax == NULL) return; /* No syntax, everything is HL_NORMAL. */

    int i, prev_sep, in_string, in_comment;
    char *p;
    char **keywords = E.syntax->keywords;
    char *scs = E.syntax->singleline_comment_start;
    char *mcs = E.syntax->multiline_comment_start;
    char *mce = E.syntax->multiline_comment_end;

    /* Point to the first non-space char. */
    p = row->render;
    i = 0; /* Current char offset */
    while(*p && isspace(*p)) {
        p++;
        i++;
    }
    prev_sep = 1; /* Tell the parser if 'i' points to start of word. */
    in_string = 0; /* Are we inside "" or '' ? */
    in_comment = 0; /* Are we inside multi-line comment? */

    /* If the previous line has an open comment, this line starts
     * with an open comment state. */
    if (row->idx > 0 && editorRowHasOpenComment(&E.row[row->idx-1], mce)) {
//?         addstr("continue multiline comment|");
        in_comment = 1;
    }

    while(*p) {
        /* Handle multi line comments. */
        if (in_comment) {
            row->hl[i] = HL_MLCOMMENT;
            if (starts_with(p, mce)) {
//?                 addstr("mce|");
                memset(&row->hl[i],HL_MLCOMMENT, strlen(mce));
                p += strlen(mce); i += strlen(mce);
                in_comment = 0;
                prev_sep = 1;
                continue;
            } else {
                prev_sep = 0;
                p++; i++;
                continue;
            }
        } else if (starts_with(p, mcs)) {
//?             addstr("mcs|");
            memset(&row->hl[i],HL_MLCOMMENT, strlen(mcs));
            p += strlen(mcs); i += strlen(mcs);
            in_comment = 1;
            prev_sep = 0;
            continue;
        }

        /* Handle single-line comments. */
        if (prev_sep && *p == scs[0] && *(p+1) == scs[1]) {
            /* From here to end is a comment */
            memset(row->hl+i,HL_COMMENT,row->size-i);
            return;
        }

        /* Handle "" and '' */
        if (in_string) {
            row->hl[i] = HL_STRING;
            if (*p == '\\') {
                row->hl[i+1] = HL_STRING;
                p += 2; i += 2;
                prev_sep = 0;
                continue;
            }
            if (*p == in_string) in_string = 0;
            p++; i++;
            continue;
        } else {
            if (*p == '"' || *p == '\'') {
                in_string = *p;
                row->hl[i] = HL_STRING;
                p++; i++;
                prev_sep = 0;
                continue;
            }
        }

        /* Handle non printable chars. */
        if (!isprint(*p)) {
            row->hl[i] = HL_NONPRINT;
            p++; i++;
            prev_sep = 0;
            continue;
        }

        /* Handle numbers */
        if ((isdigit(*p) && (prev_sep || row->hl[i-1] == HL_NUMBER)) ||
            (*p == '.' && i > 0 && row->hl[i-1] == HL_NUMBER)) {
            row->hl[i] = HL_NUMBER;
            p++; i++;
            prev_sep = 0;
            continue;
        }

        /* Handle keywords and lib calls */
        if (prev_sep) {
            int j;
            for (j = 0; keywords[j]; j++) {
                int klen = strlen(keywords[j]);
                int kw2 = keywords[j][klen-1] == '|';
                if (kw2) klen--;

                if (!memcmp(p,keywords[j],klen) &&
                    is_separator(*(p+klen)))
                {
                    /* Keyword */
                    memset(row->hl+i,kw2 ? HL_KEYWORD2 : HL_KEYWORD1,klen);
                    p += klen;
                    i += klen;
                    break;
                }
            }
            if (keywords[j] != NULL) {
                prev_sep = 0;
                continue; /* We had a keyword match */
            }
        }

        /* Not special chars */
        prev_sep = is_separator(*p);
        p++; i++;
    }

    /* Propagate syntax change to the next row if the open comment
     * state changed. This may recursively affect all the following rows
     * in the file. */
    int oc = editorRowHasOpenComment(row, mce);
    if (row->hl_oc != oc && row->idx+1 < E.numrows)
        editorUpdateSyntax(&E.row[row->idx+1]);
    row->hl_oc = oc;
}

/* Maps syntax highlight token types to terminal colors. */
static int editorSyntaxToColor(int hl) {
    switch(hl) {
    case HL_COMMENT:
    case HL_MLCOMMENT: return 6;  /* cyan */
    case HL_KEYWORD1: return 3;   /* yellow */
    case HL_KEYWORD2: return 2;   /* green */
    case HL_STRING: return 5;     /* magenta */
    case HL_NUMBER: return 1;     /* red */
    case HL_MATCH: return 4;      /* blue */
    default: return 7;            /* white */
    }
}

/* ======================= Editor rows implementation ======================= */

/* Update the rendered version and the syntax highlight of a row. */
static void editorUpdateRow(erow *row) {
    unsigned int tabs = 0, nonprint = 0;
    int j, idx;

   /* Create a version of the row we can directly print on the screen,
     * respecting tabs, substituting non printable characters with '?'. */
    free(row->render);
    for (j = 0; j < row->size; j++)
        if (row->chars[j] == TAB) tabs++;

    unsigned long long allocsize =
        (unsigned long long) row->size + tabs*8 + nonprint*9 + 1;
    if (allocsize > UINT32_MAX) {
        printf("Some line of the edited file is too long for kilo\n");
        exit(1);
    }

    row->render = malloc(row->size + tabs*8 + nonprint*9 + 1);
    idx = 0;
    for (j = 0; j < row->size; j++) {
        if (row->chars[j] == TAB) {
            row->render[idx++] = ' ';
            while((idx+1) % 8 != 0) row->render[idx++] = ' ';
        } else {
            row->render[idx++] = row->chars[j];
        }
    }
    row->rsize = idx;
    row->render[idx] = '\0';

    /* Update the syntax highlighting attributes of the row. */
    editorUpdateSyntax(row);
}

/* Insert a row at the specified position, shifting the other rows on the bottom
 * if required. */
static void editorInsertRow(int at, char *s, size_t len) {
    if (at > E.numrows) return;
    E.row = realloc(E.row,sizeof(erow)*(E.numrows+1));
    if (at != E.numrows) {
        memmove(E.row+at+1,E.row+at,sizeof(E.row[0])*(E.numrows-at));
        for (int j = at+1; j <= E.numrows; j++) E.row[j].idx++;
    }
    E.row[at].size = len;
    E.row[at].chars = malloc(len+1);
    memcpy(E.row[at].chars,s,len+1);
    E.row[at].hl = NULL;
    E.row[at].hl_oc = 0;
    E.row[at].render = NULL;
    E.row[at].rsize = 0;
    E.row[at].idx = at;
    editorUpdateRow(E.row+at);
    E.numrows++;
    E.dirty++;
}

/* Free row's heap allocated stuff. */
static void editorFreeRow(erow *row) {
    free(row->render);
    free(row->chars);
    free(row->hl);
}

/* Remove the row at the specified position, shifting the remainign on the
 * top. */
static void editorDelRow(int at) {
    erow *row;

    if (at >= E.numrows) return;
    row = E.row+at;
    editorFreeRow(row);
    memmove(E.row+at,E.row+at+1,sizeof(E.row[0])*(E.numrows-at-1));
    for (int j = at; j < E.numrows-1; j++) E.row[j].idx++;
    E.numrows--;
    E.dirty++;
}

void clearEditor(void) {
    E.cx = E.cy = 0;
    E.rowoff = E.coloff = 0;
    for (int j = E.numrows-1; j >= 0; j--)
      editorDelRow(j);
}

/* Turn the editor rows into a single heap-allocated string.
 * Returns the pointer to the heap-allocated string and populate the
 * integer pointed by 'buflen' with the size of the string, escluding
 * the final nulterm. */
static char *editorRowsToString(int *buflen) {
    char *buf = NULL, *p;
    int totlen = 0;
    int j;

    /* Compute count of bytes */
    for (j = 0; j < E.numrows; j++)
        totlen += E.row[j].size+1; /* +1 is for "\n" at end of every row */
    *buflen = totlen;
    totlen++; /* Also make space for nulterm */

    p = buf = malloc(totlen);
    for (j = 0; j < E.numrows; j++) {
        memcpy(p,E.row[j].chars,E.row[j].size);
        p += E.row[j].size;
        *p = '\n';
        p++;
    }
    *p = '\0';
    return buf;
}

/* Insert a character at the specified position in a row, moving the remaining
 * chars on the right if needed. */
static void editorRowInsertChar(erow *row, int at, int c) {
    if (at > row->size) {
        /* Pad the string with spaces if the insert location is outside the
         * current length by more than a single character. */
        int padlen = at-row->size;
        /* In the next line +2 means: new char and null term. */
        row->chars = realloc(row->chars,row->size+padlen+2);
        memset(row->chars+row->size,' ',padlen);
        row->chars[row->size+padlen+1] = '\0';
        row->size += padlen+1;
    } else {
        /* If we are in the middle of the string just make space for 1 new
         * char plus the (already existing) null term. */
        row->chars = realloc(row->chars,row->size+2);
        memmove(row->chars+at+1,row->chars+at,row->size-at+1);
        row->size++;
    }
    row->chars[at] = c;
    editorUpdateRow(row);
    E.dirty++;
}

/* Append the string 's' at the end of a row */
static void editorRowAppendString(erow *row, char *s, size_t len) {
    row->chars = realloc(row->chars,row->size+len+1);
    memcpy(row->chars+row->size,s,len);
    row->size += len;
    row->chars[row->size] = '\0';
    editorUpdateRow(row);
    E.dirty++;
}

/* Delete the character at offset 'at' from the specified row. */
static void editorRowDelChar(erow *row, int at) {
    if (row->size <= at) return;
    memmove(row->chars+at,row->chars+at+1,row->size-at);
    editorUpdateRow(row);
    row->size--;
    E.dirty++;
}

/* Insert the specified char at the current prompt position. */
static void editorInsertChar(int c) {
    int filerow = E.rowoff+E.cy;
    int filecol = E.coloff+E.cx;
    erow *row = (filerow >= E.numrows) ? NULL : &E.row[filerow];

    /* If the row where the cursor is currently located does not exist in our
     * logical representaion of the file, add enough empty rows as needed. */
    if (!row) {
        while(E.numrows <= filerow)
            editorInsertRow(E.numrows,"",0);
    }
    row = &E.row[filerow];
    editorRowInsertChar(row,filecol,c);
    if (E.cx == COLS-1)
        E.coloff++;
    else
        E.cx++;
    E.dirty++;
}

/* Inserting a newline is slightly complex as we have to handle inserting a
 * newline in the middle of a line, splitting the line as needed. */
static void editorInsertNewline(void) {
    int filerow = E.rowoff+E.cy;
    int filecol = E.coloff+E.cx;
    erow *row = (filerow >= E.numrows) ? NULL : &E.row[filerow];

    if (!row) {
        if (filerow == E.numrows) {
            editorInsertRow(filerow,"",0);
            goto fixcursor;
        }
        return;
    }
    /* If the cursor is over the current line size, we want to conceptually
     * think it's just over the last character. */
    if (filecol >= row->size) filecol = row->size;
    if (filecol == 0) {
        editorInsertRow(filerow,"",0);
    } else {
        /* We are in the middle of a line. Split it between two rows. */
        editorInsertRow(filerow+1,row->chars+filecol,row->size-filecol);
        row = &E.row[filerow];
        row->chars[filecol] = '\0';
        row->size = filecol;
        editorUpdateRow(row);
    }
fixcursor:
    if (E.cy == LINES-1-1) {
        E.rowoff++;
    } else {
        E.cy++;
    }
    E.cx = 0;
    E.coloff = 0;
}

/* Delete the char at the current prompt position. */
static void editorDelChar() {
    int filerow = E.rowoff+E.cy;
    int filecol = E.coloff+E.cx;
    erow *row = (filerow >= E.numrows) ? NULL : &E.row[filerow];

    if (!row || (filecol == 0 && filerow == 0)) return;
    if (filecol == 0) {
        /* Handle the case of column 0, we need to move the current line
         * on the right of the previous one. */
        filecol = E.row[filerow-1].size;
        editorRowAppendString(&E.row[filerow-1],row->chars,row->size);
        editorDelRow(filerow);
        row = NULL;
        if (E.cy == 0)
            E.rowoff--;
        else
            E.cy--;
        E.cx = filecol;
        if (E.cx >= COLS) {
            int shift = (COLS-E.cx)+1;
            E.cx -= shift;
            E.coloff += shift;
        }
    } else {
        editorRowDelChar(row,filecol-1);
        if (E.cx == 0 && E.coloff)
            E.coloff--;
        else
            E.cx--;
    }
    if (row) editorUpdateRow(row);
    E.dirty++;
}

/* Load the specified program in the editor memory and returns 0 on success
 * or 1 on error. */
int editorOpen(char *filename) {
    FILE *fp;

    E.dirty = 0;
    free(E.filename);
    size_t fnlen = strlen(filename)+1;
    E.filename = malloc(fnlen);
    memcpy(E.filename,filename,fnlen);

    fp = fopen(filename,"r");
    if (!fp) {
        if (errno != ENOENT) {
            perror("Opening file");
            exit(1);
        }
        return 1;
    }

    char *line = NULL;
    size_t linecap = 0;
    ssize_t linelen;
    while((linelen = getline(&line,&linecap,fp)) != -1) {
        if (linelen && (line[linelen-1] == '\n' || line[linelen-1] == '\r'))
            line[--linelen] = '\0';
        editorInsertRow(E.numrows,line,linelen);
    }
    free(line);
    fclose(fp);
    E.dirty = 0;
    return 0;
}

/* Save the current file on disk. Return 0 on success, 1 on error. */
static int editorSaveToDisk(void) {
    int len;
    char *buf = editorRowsToString(&len);
    int fd = open(E.filename,O_RDWR|O_CREAT,0644);
    if (fd == -1) goto writeerr;

    /* Use truncate + a single write(2) call in order to make saving
     * a bit safer, under the limits of what we can do in a small editor. */
    if (ftruncate(fd,len) == -1) goto writeerr;
    if (write(fd,buf,len) != len) goto writeerr;

    close(fd);
    free(buf);
    E.dirty = 0;
    editorSetStatusMessage("%d bytes written on disk", len);
    return 0;

writeerr:
    free(buf);
    if (fd != -1) close(fd);
    editorSetStatusMessage("Can't save! I/O error: %s",strerror(errno));
    return 1;
}

/* ============================= Terminal update ============================ */

extern char *Previous_error;
extern void draw_menu_item(const char* key, const char* name);

static void editorMenu(void) {
    attrset(A_REVERSE);
    for (int x = 0; x < COLS; ++x)
      mvaddch(LINES-1, x, ' ');
    attrset(A_NORMAL);
    extern int menu_column;
    menu_column = 2;
    draw_menu_item("^e", "run");
    if (Previous_error != NULL) {
      attron(A_BOLD);
      draw_menu_item("^c", "abort");
      attroff(A_BOLD);
    }
    draw_menu_item("^g", "go");
    draw_menu_item("^f", "find");
    attrset(A_NORMAL);
}

extern void draw_string_on_menu (const char* s);
static void editorFindMenu(void) {
    attrset(A_REVERSE);
    for (int x = 0; x < COLS; ++x)
      mvaddch(LINES-1, x, ' ');
    attrset(A_NORMAL);
    extern int menu_column;
    menu_column = 2;
    draw_menu_item("Esc", "cancel");
    draw_menu_item("Enter", "submit");
    draw_menu_item("^u", "clear");
    // draw_menu_item("←/↑", "previous");
    attroff(A_REVERSE);
    mvaddstr(LINES-1, menu_column, " ←/↑ ");
    menu_column += 5;  // strlen isn't sufficient
    attron(A_REVERSE);
    draw_string_on_menu("previous");
    // draw_menu_item("↓/→", "next");
    attroff(A_REVERSE);
    mvaddstr(LINES-1, menu_column, " ↓/→ ");
    menu_column += 5;  // strlen isn't sufficient
    attron(A_REVERSE);
    draw_string_on_menu("next");
    attrset(A_NORMAL);
}

static void editorGoMenu(void) {
    attrset(A_REVERSE);
    for (int x = 0; x < COLS; ++x)
      mvaddch(LINES-1, x, ' ');
    attrset(A_NORMAL);
    extern int menu_column;
    menu_column = 2;
    draw_menu_item("Esc", "cancel");
    draw_menu_item("Enter", "submit");
    draw_menu_item("^u", "clear");
    attrset(A_NORMAL);
}

static void editorRefreshScreen(void (*menu_func)(void)) {
    int y;
    erow *r;
    int current_color = -1;
    curs_set(0);
    clear();
    attrset(A_NORMAL);
    for (y = 0; y < LINES-1; y++) {
        int filerow = E.rowoff+y;

        if (filerow >= E.numrows) {
            continue;
        }

        r = &E.row[filerow];

        int len = r->rsize - E.coloff;
        mvaddstr(y, 0, "");
        if (len > 0) {
            if (len > COLS) len = COLS;
            char *c = r->render+E.coloff;
            unsigned char *hl = r->hl+E.coloff;
            int j;
            for (j = 0; j < len; j++) {
                if (hl[j] == HL_NONPRINT) {
                    char sym;
                    attron(A_REVERSE);
                    if (c[j] <= 26)
                        sym = '@'+c[j];
                    else
                        sym = '?';
                    addch(sym);
                    attroff(A_REVERSE);
                } else if (hl[j] == HL_NORMAL) {
                    if (current_color != -1) {
                        attrset(A_NORMAL);
                        current_color = -1;
                    }
                    addch(c[j]);
                } else {
                    int color = editorSyntaxToColor(hl[j]);
                    if (color != current_color) {
                        attrset(COLOR_PAIR(color));
                        current_color = color;
                    }
                    addch(c[j]);
                }
            }
        }
    }

    (*menu_func)();

    attrset(A_REVERSE);
    addstr("    ");
    addstr(E.statusmsg);
    attrset(A_NORMAL);

    /* Put cursor at its current position. Note that the horizontal position
     * at which the cursor is displayed may be different compared to 'E.cx'
     * because of TABs. */
    int j;
    int cx = 0;
    int filerow = E.rowoff+E.cy;
    erow *row = (filerow >= E.numrows) ? NULL : &E.row[filerow];
    if (row) {
        for (j = E.coloff; j < (E.cx+E.coloff); j++) {
            if (j < row->size && row->chars[j] == TAB) cx += 7-((cx)%8);
            cx++;
        }
    }
    mvaddstr(E.cy, cx, "");
    curs_set(1);
}

/* Set an editor status message for the second line of the status, at the
 * end of the screen. */
static void editorSetStatusMessage(const char *fmt, ...) {
    va_list ap;
    va_start(ap,fmt);
    vsnprintf(E.statusmsg,sizeof(E.statusmsg),fmt,ap);
    va_end(ap);
    E.statusmsg_time = time(NULL);
}

/* =============================== Find mode ================================ */

#define KILO_QUERY_LEN 256

static void editorFind() {
    char query[KILO_QUERY_LEN+1] = {0};
    int qlen = 0;
    int last_match = -1; /* Last line where a match was found. -1 for none. */
    int find_next = 0; /* if 1 search next, if -1 search prev. */
    int saved_hl_line = -1;  /* No saved HL */
    char *saved_hl = NULL;

#define FIND_RESTORE_HL do { \
    if (saved_hl) { \
        memcpy(E.row[saved_hl_line].hl,saved_hl, E.row[saved_hl_line].rsize); \
        free(saved_hl); \
        saved_hl = NULL; \
    } \
} while (0)

    /* Save the cursor position in order to restore it later. */
    int saved_cx = E.cx, saved_cy = E.cy;
    int saved_coloff = E.coloff, saved_rowoff = E.rowoff;

    while(1) {
        editorRefreshScreen(editorFindMenu);
        mvprintw(LINES-2, 0, "Find: %s", query);

        int c = getch();
        if (c == KEY_BACKSPACE) {
            if (qlen != 0) query[--qlen] = '\0';
            last_match = -1;
        } else if (c == ESC || c == ENTER) {
            if (c == ESC) {
                E.cx = saved_cx; E.cy = saved_cy;
                E.coloff = saved_coloff; E.rowoff = saved_rowoff;
            }
            FIND_RESTORE_HL;
            editorSetStatusMessage("");
            return;
        } else if (c == CTRL_U) {
            qlen = 0;
            query[qlen] = '\0';
        } else if (c == KEY_RIGHT || c == KEY_DOWN) {
            find_next = 1;
        } else if (c == KEY_LEFT || c == KEY_UP) {
            find_next = -1;
        } else if (isprint(c)) {
            if (qlen < KILO_QUERY_LEN) {
                query[qlen++] = c;
                query[qlen] = '\0';
                last_match = -1;
            }
        }

        /* Search occurrence. */
        if (last_match == -1) find_next = 1;
        if (find_next) {
            char *match = NULL;
            int match_offset = 0;
            int i, current = last_match;

            for (i = 0; i < E.numrows; i++) {
                current += find_next;
                if (current == -1) current = E.numrows-1;
                else if (current == E.numrows) current = 0;
                match = strstr(E.row[current].render,query);
                if (match) {
                    match_offset = match-E.row[current].render;
                    break;
                }
            }
            find_next = 0;

            /* Highlight */
            FIND_RESTORE_HL;

            if (match) {
                erow *row = &E.row[current];
                last_match = current;
                if (row->hl) {
                    saved_hl_line = current;
                    saved_hl = malloc(row->rsize);
                    memcpy(saved_hl,row->hl,row->rsize);
                    memset(row->hl+match_offset,HL_MATCH,qlen);
                }
                E.cy = 0;
                E.cx = match_offset;
                E.rowoff = current;
                E.coloff = 0;
                /* Scroll horizontally as needed. */
                if (E.cx > COLS) {
                    int diff = E.cx - COLS;
                    E.cx -= diff;
                    E.coloff += diff;
                }
            }
        }
    }
}

/* ========================= Editor events handling  ======================== */

/* Handle cursor position change because arrow keys were pressed. */
static void editorMoveCursor(int key) {
    int filerow = E.rowoff+E.cy;
    int filecol = E.coloff+E.cx;
    int rowlen;
    erow *row = (filerow >= E.numrows) ? NULL : &E.row[filerow];

    switch(key) {
    case KEY_LEFT:
        if (E.cx == 0) {
            if (E.coloff) {
                E.coloff--;
            } else {
                if (filerow > 0) {
                    E.cy--;
                    E.cx = E.row[filerow-1].size;
                    if (E.cx > COLS-1) {
                        E.coloff = E.cx-COLS+1;
                        E.cx = COLS-1;
                    }
                }
            }
        } else {
            E.cx -= 1;
        }
        break;
    case KEY_RIGHT:
        if (row && filecol < row->size) {
            if (E.cx == COLS-1) {
                E.coloff++;
            } else {
                E.cx += 1;
            }
        } else if (row && filecol == row->size) {
            E.cx = 0;
            E.coloff = 0;
            if (E.cy == LINES-1-1) {
                E.rowoff++;
            } else {
                E.cy += 1;
            }
        }
        break;
    case KEY_UP:
        if (E.cy == 0) {
            if (E.rowoff) E.rowoff--;
        } else {
            E.cy -= 1;
        }
        break;
    case KEY_DOWN:
        if (filerow < E.numrows) {
            if (E.cy == LINES-1-1) {
                E.rowoff++;
            } else {
                E.cy += 1;
            }
        }
        break;
    }
    /* Fix cx if the current line has not enough chars. */
    filerow = E.rowoff+E.cy;
    filecol = E.coloff+E.cx;
    row = (filerow >= E.numrows) ? NULL : &E.row[filerow];
    rowlen = row ? row->size : 0;
    if (filecol > rowlen) {
        E.cx -= filecol-rowlen;
        if (E.cx < 0) {
            E.coloff += E.cx;
            E.cx = 0;
        }
    }
}

int identifier_char(char c) {
  /* keep sync'd with llex */
  return isalnum(c) || c == '_';
}

void word_at_cursor(char* out, int capacity) {
  erow* row = &E.row[E.rowoff + E.cy];
  int cidx = E.coloff + E.cx;
  int len = 0;
  memset(out, 0, capacity);
  /* scan back to first identifier char */
  while (cidx > 0) {
    --cidx;
    if (!identifier_char(row->chars[cidx])) {
      ++cidx;
      break;
    }
  }
  /* now scan forward */
  for (len = 0; cidx+len < row->size; ++len) {
    if (!identifier_char(row->chars[cidx+len]))
      break;
  }
  if (len < capacity)
    strncpy(out, &row->chars[cidx], len);
}

extern void save_to_current_definition_and_editor_buffer(lua_State *L, char *name);
extern void load_editor_buffer_to_current_definition_in_image(lua_State *L);
extern void editor_refresh_buffer(void);
#define CURRENT_DEFINITION_LEN 256
static void editorGo(lua_State* L) {
    char query[CURRENT_DEFINITION_LEN+1] = {0};
    int qlen = 0;

    editorSaveToDisk();
    load_editor_buffer_to_current_definition_in_image(L);

    word_at_cursor(query, CURRENT_DEFINITION_LEN);
    qlen = strlen(query);

    while(1) {
        editorRefreshScreen(editorGoMenu);
        mvprintw(LINES-2, 0, "Go to: %s", query);

        int c = getch();
        if (c == KEY_BACKSPACE) {
            if (qlen != 0) query[--qlen] = '\0';
        } else if (c == ESC || c == ENTER) {
            editorSetStatusMessage("");
            if (c == ENTER) {
              save_to_current_definition_and_editor_buffer(L, query);
              editor_refresh_buffer();
            }
            return;
        } else if (c == CTRL_U) {
          qlen = 0;
          query[qlen] = '\0';
        } else if (isprint(c)) {
            if (qlen < CURRENT_DEFINITION_LEN) {
                query[qlen++] = c;
                query[qlen] = '\0';
            }
        }
    }
}

/* Process events arriving from the standard input, which is, the user
 * is typing stuff on the terminal. */
int Quit = 0;
static void editorProcessKeypress(lua_State* L) {
    int c = getch();
    switch(c) {
    case ENTER:
        editorInsertNewline();
        break;
    case CTRL_C:
        if (Previous_error != NULL)
          exit(1);
        break;
    case CTRL_E:
        /* Save and quit. */
        editorSaveToDisk();
        Quit = 1;
        break;
    case CTRL_G:
        /* Go to a different definition. */
        editorGo(L);
        break;
    case CTRL_F:
        editorFind();
        break;
    case KEY_BACKSPACE:
        editorDelChar();
        break;
    case KEY_NPAGE:
    case KEY_PPAGE:
        if (c == KEY_PPAGE && E.cy != 0)
            E.cy = 0;
        else if (c == KEY_NPAGE && E.cy != LINES-1-1)
            E.cy = LINES-1-1;
        {
          int times = LINES-1;
          while(times--)
            editorMoveCursor(c == KEY_PPAGE ? KEY_UP : KEY_DOWN);
        }
        break;

    case KEY_UP:
    case KEY_DOWN:
    case KEY_LEFT:
    case KEY_RIGHT:
        editorMoveCursor(c);
        break;
    case CTRL_L:
        /* Just refresh the line as side effect. */
        break;
    case ESC:
        /* Nothing to do for ESC in this mode. */
        break;
    default:
        editorInsertChar(c);
        break;
    }
}

static void initEditor(void) {
    E.cx = 0;
    E.cy = 0;
    E.rowoff = 0;
    E.coloff = 0;
    E.numrows = 0;
    E.row = NULL;
    E.dirty = 0;
    E.filename = NULL;
    E.syntax = &HLDB[0];
}

void edit(lua_State* L, char* filename, const char* message) {
    initEditor();
    editorOpen(filename);
    editorSetStatusMessage(message);
    while(!Quit) {
        editorRefreshScreen(editorMenu);
        editorProcessKeypress(L);
    }
}

void resumeEdit(lua_State* L, char* filename) {
    Quit = 0;
    editorSetStatusMessage(Previous_error);
    while(!Quit) {
        editorRefreshScreen(editorMenu);
        editorProcessKeypress(L);
    }
}