micromizing dwm step 1

17 years ago · 0235a84ef2
--- a/+ 3
+++ b/+ 3
@ -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}
--- a/bar.c
+++ b/bar.c
@ -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));
 }


--- a/client.c
+++ b/client.c
@ -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);
 }
--- 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] */
--- 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
--- a/dwm.c
+++ b/dwm.c
--- a/dwm.h
+++ b/dwm.h
@ -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 */
--- a/event.c
+++ b/event.c
@ -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);
 	}
 }
--- a/main.c
+++ b/main.c
@ -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;
 }
--- a/screen.c
+++ b/screen.c
@ -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();
 }
--- a/tile.c
+++ b/tile.c
@ -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();
 }
--- a/tile.h
+++ b/tile.h
@ -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 */
--- a/util.c
+++ b/util.c
@ -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);
 			perror(" failed");
 		}
 		exit(0);
 	}
 	wait(0);
 }