+
−/* 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.
+
− *
+
− * Keys and tagging rules are organized as arrays and defined in config.h.
+
− *
+
− * To understand everything else, start reading main().
+
− */
+
−#include <errno.h>
+
−#include <locale.h>
+
−#include <stdarg.h>
+
−#include <stdio.h>
+
−#include <stdlib.h>
+
−#include <string.h>
+
−#include <unistd.h>
+
−#include <sys/select.h>
+
−#include <sys/types.h>
+
−#include <sys/wait.h>
+
−#include <X11/cursorfont.h>
+
−#include <X11/keysym.h>
+
−#include <X11/Xatom.h>
+
−#include <X11/Xlib.h>
+
−#include <X11/Xproto.h>
+
−#include <X11/Xutil.h>
+
−
+
−/* macros */
+
−#define BUTTONMASK		(ButtonPressMask|ButtonReleaseMask)
+
−#define CLEANMASK(mask)		(mask & ~(numlockmask|LockMask))
+
−#define LENGTH(x)		(sizeof x / sizeof x[0])
+
−#define MAXTAGLEN		16
+
−#define MOUSEMASK		(BUTTONMASK|PointerMotionMask)
+
−#define DEFGEOM(GEONAME,BX,BY,BW,WX,WY,WW,WH,MX,MY,MW,MH,TX,TY,TW,TH,MOX,MOY,MOW,MOH) \
+
−void GEONAME(void) { \
+
−	bx = (BX); by = (BY); bw = (BW); \
+
−	wx = (WX); wy = (WY); ww = (WW); wh = (WH); \
+
−	mx = (MX); my = (MY); mw = (MW); mh = (MH); \
+
−	tx = (TX); ty = (TY); tw = (TW); th = (TH); \
+
−	mox = (MOX); moy = (MOY); mow = (MOW); moh = (MOH); \
+
−}
+
−
+
−/* enums */
+
−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 basew, baseh, incw, inch, maxw, maxh, minw, minh;
+
−	int minax, maxax, minay, maxay;
+
−	long flags;
+
−	unsigned int bw, oldbw;
+
−	Bool isbanned, isfixed, isfloating, isurgent;
+
−	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 {
+
−	const char *symbol;
+
−	void (*apply)(void);
+
−} Geom;
+
−
+
−typedef struct {
+
−	unsigned long mod;
+
−	KeySym keysym;
+
−	void (*func)(const char *arg);
+
−	const char *arg;
+
−} Key;
+
−
+
−typedef struct {
+
−	const char *symbol;
+
−	void (*arrange)(void);
+
−	Bool isfloating;
+
−} Layout; 
+
−
+
−typedef struct {
+
−	const char *class;
+
−	const char *instance;
+
−	const char *title;
+
−	const char *tag;
+
−	Bool isfloating;
+
−} Rule;
+
−
+
−/* function declarations */
+
−void applyrules(Client *c);
+
−void arrange(void);
+
−void attach(Client *c);
+
−void attachstack(Client *c);
+
−void ban(Client *c);
+
−void buttonpress(XEvent *e);
+
−void checkotherwm(void);
+
−void cleanup(void);
+
−void configure(Client *c);
+
−void configurenotify(XEvent *e);
+
−void configurerequest(XEvent *e);
+
−unsigned int counttiled(void);
+
−void destroynotify(XEvent *e);
+
−void detach(Client *c);
+
−void detachstack(Client *c);
+
−void drawbar(void);
+
−void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
+
−void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
+
−void *emallocz(unsigned int size);
+
−void enternotify(XEvent *e);
+
−void eprint(const char *errstr, ...);
+
−void expose(XEvent *e);
+
−void floating(void); /* default floating layout */
+
−void focus(Client *c);
+
−void focusin(XEvent *e);
+
−void focusnext(const char *arg);
+
−void focusprev(const char *arg);
+
−Client *getclient(Window w);
+
−unsigned long getcolor(const char *colstr);
+
−long getstate(Window w);
+
−Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
+
−void grabbuttons(Client *c, Bool focused);
+
−void grabkeys(void);
+
−unsigned int idxoftag(const char *t);
+
−void initfont(const char *fontstr);
+
−Bool isoccupied(unsigned int t);
+
−Bool isprotodel(Client *c);
+
−Bool isurgent(unsigned int t);
+
−Bool isvisible(Client *c);
+
−void keypress(XEvent *e);
+
−void killclient(const char *arg);
+
−void manage(Window w, XWindowAttributes *wa);
+
−void mappingnotify(XEvent *e);
+
−void maprequest(XEvent *e);
+
−void monocle(void);
+
−void movemouse(Client *c);
+
−Client *nexttiled(Client *c);
+
−void propertynotify(XEvent *e);
+
−void quit(const char *arg);
+
−void reapply(const char *arg);
+
−void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
+
−void resizemouse(Client *c);
+
−void restack(void);
+
−void run(void);
+
−void scan(void);
+
−void setclientstate(Client *c, long state);
+
−void setgeom(const char *arg);
+
−void setlayout(const char *arg);
+
−void setmfact(const char *arg);
+
−void setup(void);
+
−void spawn(const char *arg);
+
−void tag(const char *arg);
+
−unsigned int textnw(const char *text, unsigned int len);
+
−unsigned int textw(const char *text);
+
−void tileh(void);
+
−void tilehstack(unsigned int n);
+
−Client *tilemaster(unsigned int n);
+
−void tileresize(Client *c, int x, int y, int w, int h);
+
−void tilev(void);
+
−void tilevstack(unsigned int n);
+
−void togglefloating(const char *arg);
+
−void toggletag(const char *arg);
+
−void toggleview(const char *arg);
+
−void unban(Client *c);
+
−void unmanage(Client *c);
+
−void unmapnotify(XEvent *e);
+
−void updatebarpos(void);
+
−void updatesizehints(Client *c);
+
−void updatetitle(Client *c);
+
−void updatewmhints(Client *c);
+
−void view(const char *arg);
+
−void viewprevtag(const char *arg);	/* views previous selected tags */
+
−int xerror(Display *dpy, XErrorEvent *ee);
+
−int xerrordummy(Display *dpy, XErrorEvent *ee);
+
−int xerrorstart(Display *dpy, XErrorEvent *ee);
+
−void zoom(const char *arg);
+
−
+
−/* variables */
+
−char stext[256], buf[256];
+
−int screen, sx, sy, sw, sh;
+
−int (*xerrorxlib)(Display *, XErrorEvent *);
+
−int bx, by, bw, bh, blw, bgw, mx, my, mw, mh, mox, moy, mow, moh, tx, ty, tw, th, wx, wy, ww, wh;
+
−double mfact;
+
−unsigned int numlockmask = 0;
+
−void (*handler[LASTEvent]) (XEvent *) = {
+
−	[ButtonPress] = buttonpress,
+
−	[ConfigureRequest] = configurerequest,
+
−	[ConfigureNotify] = configurenotify,
+
−	[DestroyNotify] = destroynotify,
+
−	[EnterNotify] = enternotify,
+
−	[Expose] = expose,
+
−	[FocusIn] = focusin,
+
−	[KeyPress] = keypress,
+
−	[MappingNotify] = mappingnotify,
+
−	[MapRequest] = maprequest,
+
−	[PropertyNotify] = propertynotify,
+
−	[UnmapNotify] = unmapnotify
+
−};
+
−Atom wmatom[WMLast], netatom[NetLast];
+
−Bool otherwm, readin;
+
−Bool running = True;
+
−Bool *prevtags;
+
−Bool *seltags;
+
−Client *clients = NULL;
+
−Client *sel = NULL;
+
−Client *stack = NULL;
+
−Cursor cursor[CurLast];
+
−Display *dpy;
+
−DC dc = {0};
+
−Geom *geom = NULL;
+
−Layout *lt = NULL;
+
−Window root, barwin;
+
−
+
−/* configuration, allows nested code to access above variables */
+
−#include "config.h"
+
−#define TAGSZ (LENGTH(tags) * sizeof(Bool))
+
−static Bool tmp[LENGTH(tags)];
+
−
+
−/* function implementations */
+
−
+
−void
+
−applyrules(Client *c) {
+
−	unsigned int i;
+
−	Bool matched = False;
+
−	Rule *r;
+
−	XClassHint ch = { 0 };
+
−
+
−	/* rule matching */
+
−	XGetClassHint(dpy, c->win, &ch);
+
−	for(i = 0; i < LENGTH(rules); i++) {
+
−		r = &rules[i];
+
−		if((r->title && strstr(c->name, r->title))
+
−		|| (ch.res_class && r->class && strstr(ch.res_class, r->class))
+
−		|| (ch.res_name && r->instance && strstr(ch.res_name, r->instance)))
+
−		{
+
−			c->isfloating = r->isfloating;
+
−			if(r->tag) {
+
−				c->tags[idxoftag(r->tag)] = True;
+
−				matched = True;
+
−			}
+
−		}
+
−	}
+
−	if(ch.res_class)
+
−		XFree(ch.res_class);
+
−	if(ch.res_name)
+
−		XFree(ch.res_name);
+
−	if(!matched)
+
−		memcpy(c->tags, seltags, TAGSZ);
+
−}
+
−
+
−void
+
−arrange(void) {
+
−	Client *c;
+
−
+
−	for(c = clients; c; c = c->next)
+
−		if(isvisible(c))
+
−			unban(c);
+
−		else
+
−			ban(c);
+
−
+
−	focus(NULL);
+
−	lt->arrange();
+
−	restack();
+
−}
+
−
+
−void
+
−attach(Client *c) {
+
−	if(clients)
+
−		clients->prev = c;
+
−	c->next = clients;
+
−	clients = c;
+
−}
+
−
+
−void
+
−attachstack(Client *c) {
+
−	c->snext = stack;
+
−	stack = c;
+
−}
+
−
+
−void
+
−ban(Client *c) {
+
−	if(c->isbanned)
+
−		return;
+
−	XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
+
−	c->isbanned = True;
+
−}
+
−
+
−void
+
−buttonpress(XEvent *e) {
+
−	unsigned int i, x;
+
−	Client *c;
+
−	XButtonPressedEvent *ev = &e->xbutton;
+
−
+
−	if(ev->window == barwin) {
+
−		if((ev->x < bgw) && ev->button == Button1) {
+
−			setgeom(NULL);
+
−			return;
+
−		}
+
−		x = bgw;
+
−		for(i = 0; i < LENGTH(tags); i++) {
+
−			x += textw(tags[i]);
+
−			if(ev->x >= bgw && 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) {
+
−			restack();
+
−			movemouse(c);
+
−		}
+
−		else if(ev->button == Button2) {
+
−			if((floating != lt->arrange) && c->isfloating)
+
−				togglefloating(NULL);
+
−			else
+
−				zoom(NULL);
+
−		}
+
−		else if(ev->button == Button3 && !c->isfixed) {
+
−			restack();
+
−			resizemouse(c);
+
−		}
+
−	}
+
−}
+
−
+
−void
+
−checkotherwm(void) {
+
−	otherwm = False;
+
−	XSetErrorHandler(xerrorstart);
+
−
+
−	/* this causes an error if some other window manager is running */
+
−	XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
+
−	XSync(dpy, False);
+
−	if(otherwm)
+
−		eprint("dwm: another window manager is already running\n");
+
−	XSync(dpy, False);
+
−	XSetErrorHandler(NULL);
+
−	xerrorxlib = XSetErrorHandler(xerror);
+
−	XSync(dpy, False);
+
−}
+
−
+
−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);
+
−	XFreeCursor(dpy, cursor[CurNormal]);
+
−	XFreeCursor(dpy, cursor[CurResize]);
+
−	XFreeCursor(dpy, cursor[CurMove]);
+
−	XDestroyWindow(dpy, barwin);
+
−	XSync(dpy, False);
+
−	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
+
−}
+
−
+
−void
+
−configure(Client *c) {
+
−	XConfigureEvent ce;
+
−
+
−	ce.type = ConfigureNotify;
+
−	ce.display = dpy;
+
−	ce.event = c->win;
+
−	ce.window = c->win;
+
−	ce.x = c->x;
+
−	ce.y = c->y;
+
−	ce.width = c->w;
+
−	ce.height = c->h;
+
−	ce.border_width = c->bw;
+
−	ce.above = None;
+
−	ce.override_redirect = False;
+
−	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
+
−}
+
−
+
−void
+
−configurenotify(XEvent *e) {
+
−	XConfigureEvent *ev = &e->xconfigure;
+
−
+
−	if(ev->window == root && (ev->width != sw || ev->height != sh)) {
+
−		sw = ev->width;
+
−		sh = ev->height;
+
−		setgeom(geom->symbol);
+
−	}
+
−}
+
−
+
−void
+
−configurerequest(XEvent *e) {
+
−	Client *c;
+
−	XConfigureRequestEvent *ev = &e->xconfigurerequest;
+
−	XWindowChanges wc;
+
−
+
−	if((c = getclient(ev->window))) {
+
−		if(ev->value_mask & CWBorderWidth)
+
−			c->bw = ev->border_width;
+
−		if(c->isfixed || c->isfloating || lt->isfloating) {
+
−			if(ev->value_mask & CWX)
+
−				c->x = sx + ev->x;
+
−			if(ev->value_mask & CWY)
+
−				c->y = sy + ev->y;
+
−			if(ev->value_mask & CWWidth)
+
−				c->w = ev->width;
+
−			if(ev->value_mask & CWHeight)
+
−				c->h = ev->height;
+
−			if((c->x - sx + c->w) > sw && c->isfloating)
+
−				c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
+
−			if((c->y - sy + c->h) > sh && c->isfloating)
+
−				c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
+
−			if((ev->value_mask & (CWX|CWY))
+
−			&& !(ev->value_mask & (CWWidth|CWHeight)))
+
−				configure(c);
+
−			if(isvisible(c))
+
−				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);
+
−}
+
−
+
−unsigned int
+
−counttiled(void) {
+
−	unsigned int n;
+
−	Client *c;
+
−
+
−	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
+
−	return n;
+
−}
+
−
+
−void
+
−destroynotify(XEvent *e) {
+
−	Client *c;
+
−	XDestroyWindowEvent *ev = &e->xdestroywindow;
+
−
+
−	if((c = getclient(ev->window)))
+
−		unmanage(c);
+
−}
+
−
+
−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
+
−detachstack(Client *c) {
+
−	Client **tc;
+
−
+
−	for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
+
−	*tc = c->snext;
+
−}
+
−
+
−void
+
−drawbar(void) {
+
−	int i, x;
+
−	Client *c;
+
−
+
−	dc.x = 0;
+
−	if(bgw > 0) {
+
−		dc.w = bgw;
+
−		drawtext(geom->symbol, dc.norm, False);
+
−		dc.x += bgw;
+
−	}
+
−	for(c = stack; c && !isvisible(c); c = c->snext);
+
−	for(i = 0; i < LENGTH(tags); i++) {
+
−		dc.w = textw(tags[i]);
+
−		if(seltags[i]) {
+
−			drawtext(tags[i], dc.sel, isurgent(i));
+
−			drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
+
−		}
+
−		else {
+
−			drawtext(tags[i], dc.norm, isurgent(i));
+
−			drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
+
−		}
+
−		dc.x += dc.w;
+
−	}
+
−	if(blw > 0) {
+
−		dc.w = blw;
+
−		drawtext(lt->symbol, dc.norm, False);
+
−		x = dc.x + dc.w;
+
−	}
+
−	else
+
−		x = dc.x;
+
−	dc.w = textw(stext);
+
−	dc.x = bw - dc.w;
+
−	if(dc.x < x) {
+
−		dc.x = x;
+
−		dc.w = bw - x;
+
−	}
+
−	drawtext(stext, dc.norm, False);
+
−	if((dc.w = dc.x - x) > bh) {
+
−		dc.x = x;
+
−		if(c) {
+
−			drawtext(c->name, dc.sel, False);
+
−			drawsquare(False, c->isfloating, False, dc.sel);
+
−		}
+
−		else
+
−			drawtext(NULL, dc.norm, False);
+
−	}
+
−	XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
+
−	XSync(dpy, False);
+
−}
+
−
+
−void
+
−drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
+
−	int x;
+
−	XGCValues gcv;
+
−	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
+
−
+
−	gcv.foreground = col[invert ? ColBG : ColFG];
+
−	XChangeGC(dpy, dc.gc, GCForeground, &gcv);
+
−	x = (dc.font.ascent + dc.font.descent + 2) / 4;
+
−	r.x = dc.x + 1;
+
−	r.y = dc.y + 1;
+
−	if(filled) {
+
−		r.width = r.height = x + 1;
+
−		XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+
−	}
+
−	else if(empty) {
+
−		r.width = r.height = x;
+
−		XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+
−	}
+
−}
+
−
+
−void
+
−drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
+
−	int x, y, w, h;
+
−	unsigned int len, olen;
+
−	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
+
−
+
−	XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
+
−	XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+
−	if(!text)
+
−		return;
+
−	w = 0;
+
−	olen = len = strlen(text);
+
−	if(len >= sizeof buf)
+
−		len = sizeof buf - 1;
+
−	memcpy(buf, text, len);
+
−	buf[len] = 0;
+
−	h = 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[invert ? ColBG : 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);
+
−}
+
−
+
−void *
+
−emallocz(unsigned int size) {
+
−	void *res = calloc(1, size);
+
−
+
−	if(!res)
+
−		eprint("fatal: could not malloc() %u bytes\n", size);
+
−	return res;
+
−}
+
−
+
−void
+
−enternotify(XEvent *e) {
+
−	Client *c;
+
−	XCrossingEvent *ev = &e->xcrossing;
+
−
+
−	if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
+
−		return;
+
−	if((c = getclient(ev->window)))
+
−		focus(c);
+
−	else
+
−		focus(NULL);
+
−}
+
−
+
−void
+
−eprint(const char *errstr, ...) {
+
−	va_list ap;
+
−
+
−	va_start(ap, errstr);
+
−	vfprintf(stderr, errstr, ap);
+
−	va_end(ap);
+
−	exit(EXIT_FAILURE);
+
−}
+
−
+
−void
+
−expose(XEvent *e) {
+
−	XExposeEvent *ev = &e->xexpose;
+
−
+
−	if(ev->count == 0 && (ev->window == barwin))
+
−		drawbar();
+
−}
+
−
+
−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);
+
−}
+
−
+
−void
+
−focus(Client *c) {
+
−	if(!c || (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;
+
−	if(c) {
+
−		XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
+
−		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
+
−	}
+
−	else
+
−		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
+
−	drawbar();
+
−}
+
−
+
−void
+
−focusin(XEvent *e) { /* there are some broken focus acquiring clients */
+
−	XFocusChangeEvent *ev = &e->xfocus;
+
−
+
−	if(sel && ev->window != sel->win)
+
−		XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
+
−}
+
−
+
−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();
+
−	}
+
−}
+
−
+
−Client *
+
−getclient(Window w) {
+
−	Client *c;
+
−
+
−	for(c = clients; c && c->win != w; c = c->next);
+
−	return c;
+
−}
+
−
+
−unsigned long
+
−getcolor(const char *colstr) {
+
−	Colormap cmap = DefaultColormap(dpy, screen);
+
−	XColor color;
+
−
+
−	if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
+
−		eprint("error, cannot allocate color '%s'\n", colstr);
+
−	return color.pixel;
+
−}
+
−
+
−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;
+
−}
+
−
+
−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
+
−grabbuttons(Client *c, Bool focused) {
+
−	int i, j;
+
−	unsigned int buttons[]   = { Button1, Button2, Button3 };
+
−	unsigned int modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask,
+
−	                             MODKEY|numlockmask|LockMask} ;
+
−
+
−	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
+
−	if(focused)
+
−		for(i = 0; i < LENGTH(buttons); i++)
+
−			for(j = 0; j < LENGTH(modifiers); j++)
+
−				XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
+
−				            BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
+
−	else
+
−		XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
+
−		            BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
+
−}
+
−
+
−void
+
−grabkeys(void)  {
+
−	unsigned int i, j;
+
−	KeyCode code;
+
−	XModifierKeymap *modmap;
+
−
+
−	/* init modifier map */
+
−	modmap = XGetModifierMapping(dpy);
+
−	for(i = 0; i < 8; i++)
+
−		for(j = 0; j < modmap->max_keypermod; j++) {
+
−			if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
+
−				numlockmask = (1 << i);
+
−		}
+
−	XFreeModifiermap(modmap);
+
−
+
−	XUngrabKey(dpy, AnyKey, AnyModifier, root);
+
−	for(i = 0; i < LENGTH(keys); 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);
+
−	}
+
−}
+
−
+
−unsigned int
+
−idxoftag(const char *t) {
+
−	unsigned int i;
+
−
+
−	for(i = 0; (i < LENGTH(tags)) && t && strcmp(tags[i], t); i++);
+
−	return (i < LENGTH(tags)) ? i : 0;
+
−}
+
−
+
−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;
+
−}
+
−
+
−Bool
+
−isoccupied(unsigned int t) {
+
−	Client *c;
+
−
+
−	for(c = clients; c; c = c->next)
+
−		if(c->tags[t])
+
−			return True;
+
−	return False;
+
−}
+
−
+
−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;
+
−}
+
−
+
−Bool
+
−isurgent(unsigned int t) {
+
−	Client *c;
+
−
+
−	for(c = clients; c; c = c->next)
+
−		if(c->isurgent && c->tags[t])
+
−			return True;
+
−	return False;
+
−}
+
−
+
−Bool
+
−isvisible(Client *c) {
+
−	unsigned int i;
+
−
+
−	for(i = 0; i < LENGTH(tags); i++)
+
−		if(c->tags[i] && seltags[i])
+
−			return True;
+
−	return False;
+
−}
+
−
+
−void
+
−keypress(XEvent *e) {
+
−	unsigned int i;
+
−	KeySym keysym;
+
−	XKeyEvent *ev;
+
−
+
−	ev = &e->xkey;
+
−	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
+
−	for(i = 0; i < LENGTH(keys); i++)
+
−		if(keysym == keys[i].keysym
+
−		&& CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
+
−		{
+
−			if(keys[i].func)
+
−				keys[i].func(keys[i].arg);
+
−		}
+
−}
+
−
+
−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) {
+
−	Client *c, *t = NULL;
+
−	Status rettrans;
+
−	Window trans;
+
−	XWindowChanges wc;
+
−
+
−	c = emallocz(sizeof(Client));
+
−	c->tags = emallocz(TAGSZ);
+
−	c->win = w;
+
−
+
−	/* geometry */
+
−	c->x = wa->x;
+
−	c->y = wa->y;
+
−	c->w = wa->width;
+
−	c->h = wa->height;
+
−	c->oldbw = wa->border_width;
+
−	if(c->w == sw && c->h == sh) {
+
−		c->x = sx;
+
−		c->y = sy;
+
−		c->bw = wa->border_width;
+
−	}
+
−	else {
+
−		if(c->x + c->w + 2 * c->bw > wx + ww)
+
−			c->x = wx + ww - c->w - 2 * c->bw;
+
−		if(c->y + c->h + 2 * c->bw > wy + wh)
+
−			c->y = wy + wh - c->h - 2 * c->bw;
+
−		if(c->x < wx)
+
−			c->x = wx;
+
−		if(c->y < wy)
+
−			c->y = wy;
+
−		c->bw = BORDERPX;
+
−	}
+
−
+
−	wc.border_width = c->bw;
+
−	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, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
+
−	grabbuttons(c, False);
+
−	updatetitle(c);
+
−	if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
+
−		for(t = clients; t && t->win != trans; t = t->next);
+
−	if(t)
+
−		memcpy(c->tags, t->tags, TAGSZ);
+
−	else
+
−		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
+
−mappingnotify(XEvent *e) {
+
−	XMappingEvent *ev = &e->xmapping;
+
−
+
−	XRefreshKeyboardMapping(ev);
+
−	if(ev->request == MappingKeyboard)
+
−		grabkeys();
+
−}
+
−
+
−void
+
−maprequest(XEvent *e) {
+
−	static XWindowAttributes wa;
+
−	XMapRequestEvent *ev = &e->xmaprequest;
+
−
+
−	if(!XGetWindowAttributes(dpy, ev->window, &wa))
+
−		return;
+
−	if(wa.override_redirect)
+
−		return;
+
−	if(!getclient(ev->window))
+
−		manage(ev->window, &wa);
+
−}
+
−
+
−void
+
−monocle(void) {
+
−	Client *c;
+
−
+
−	for(c = clients; c; c = c->next)
+
−		if(isvisible(c))
+
−			resize(c, mox, moy, mow - 2 * c->bw, moh - 2 * c->bw, RESIZEHINTS);
+
−}
+
−
+
−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;
+
−	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(wx - nx) < SNAP)
+
−				nx = wx;
+
−			else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < SNAP)
+
−				nx = wx + ww - c->w - 2 * c->bw;
+
−			if(abs(wy - ny) < SNAP)
+
−				ny = wy;
+
−			else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < SNAP)
+
−				ny = wy + wh - c->h - 2 * c->bw;
+
−			if(!c->isfloating && !lt->isfloating && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
+
−				togglefloating(NULL);
+
−			if((lt->isfloating) || c->isfloating)
+
−				resize(c, nx, ny, c->w, c->h, False);
+
−			break;
+
−		}
+
−	}
+
−}
+
−
+
−Client *
+
−nexttiled(Client *c) {
+
−	for(; c && (c->isfloating || !isvisible(c)); c = c->next);
+
−	return c;
+
−}
+
−
+
−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;
+
−		case XA_WM_HINTS:
+
−			updatewmhints(c);
+
−			drawbar();
+
−			break;
+
−		}
+
−		if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
+
−			updatetitle(c);
+
−			if(c == sel)
+
−				drawbar();
+
−		}
+
−	}
+
−}
+
−
+
−void
+
−quit(const char *arg) {
+
−	readin = running = False;
+
−}
+
−
+
−void
+
−reapply(const char *arg) {
+
−	static Bool zerotags[LENGTH(tags)] = { 0 };
+
−	Client *c;
+
−
+
−	for(c = clients; c; c = c->next) {
+
−		memcpy(c->tags, zerotags, sizeof zerotags);
+
−		applyrules(c);
+
−	}
+
−	arrange();
+
−}
+
−
+
−void
+
−resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
+
−	XWindowChanges wc;
+
−
+
−	if(sizehints) {
+
−		/* set minimum possible */
+
−		if(w < 1)
+
−			w = 1;
+
−		if(h < 1)
+
−			h = 1;
+
−
+
−		/* temporarily remove base dimensions */
+
−		w -= c->basew;
+
−		h -= c->baseh;
+
−
+
−		/* adjust for aspect limits */
+
−		if(c->minax != c->maxax && c->minay != c->maxay 
+
−		&& c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0)
+
−		{
+
−			if (w * c->maxay > h * c->maxax)
+
−				w = h * c->maxax / c->maxay;
+
−			else if (w * c->minay < h * c->minax)
+
−				h = w * c->minay / c->minax;
+
−		}
+
−
+
−		/* adjust for increment value */
+
−		if(c->incw)
+
−			w -= w % c->incw;
+
−		if(c->inch)
+
−			h -= h % c->inch;
+
−
+
−		/* restore base dimensions */
+
−		w += c->basew;
+
−		h += c->baseh;
+
−
+
−		if(c->minw > 0 && w < c->minw)
+
−			w = c->minw;
+
−		if(c->minh > 0 && h < c->minh)
+
−			h = c->minh;
+
−		if(c->maxw > 0 && w > c->maxw)
+
−			w = c->maxw;
+
−		if(c->maxh > 0 && h > c->maxh)
+
−			h = c->maxh;
+
−	}
+
−	if(w <= 0 || h <= 0)
+
−		return;
+
−	if(x > sx + sw)
+
−		x = sw - w - 2 * c->bw;
+
−	if(y > sy + sh)
+
−		y = sh - h - 2 * c->bw;
+
−	if(x + w + 2 * c->bw < sx)
+
−		x = sx;
+
−	if(y + h + 2 * c->bw < 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->bw;
+
−		XConfigureWindow(dpy, c->win,
+
−				CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
+
−		configure(c);
+
−		XSync(dpy, False);
+
−	}
+
−}
+
−
+
−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;
+
−	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 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->bw - 1, c->h + c->bw - 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->bw + 1) <= 0)
+
−				nw = 1;
+
−			if((nh = ev.xmotion.y - ocy - 2 * c->bw + 1) <= 0)
+
−				nh = 1;
+
−			if(!c->isfloating && !lt->isfloating && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
+
−				togglefloating(NULL);
+
−			if((lt->isfloating) || c->isfloating)
+
−				resize(c, c->x, c->y, nw, nh, True);
+
−			break;
+
−		}
+
−	}
+
−}
+
−
+
−void
+
−restack(void) {
+
−	Client *c;
+
−	XEvent ev;
+
−	XWindowChanges wc;
+
−
+
−	drawbar();
+
−	if(!sel)
+
−		return;
+
−	if(sel->isfloating || lt->isfloating)
+
−		XRaiseWindow(dpy, sel->win);
+
−	if(!lt->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
+
−run(void) {
+
−	char *p;
+
−	char sbuf[sizeof stext];
+
−	fd_set rd;
+
−	int r, xfd;
+
−	unsigned int len, offset;
+
−	XEvent ev;
+
−
+
−	/* main event loop, also reads status text from stdin */
+
−	XSync(dpy, False);
+
−	xfd = ConnectionNumber(dpy);
+
−	readin = True;
+
−	offset = 0;
+
−	len = sizeof stext - 1;
+
−	sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
+
−	while(running) {
+
−		FD_ZERO(&rd);
+
−		if(readin)
+
−			FD_SET(STDIN_FILENO, &rd);
+
−		FD_SET(xfd, &rd);
+
−		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
+
−			if(errno == EINTR)
+
−				continue;
+
−			eprint("select failed\n");
+
−		}
+
−		if(FD_ISSET(STDIN_FILENO, &rd)) {
+
−			switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
+
−			case -1:
+
−				strncpy(stext, strerror(errno), len);
+
−				readin = False;
+
−				break;
+
−			case 0:
+
−				strncpy(stext, "EOF", 4);
+
−				readin = False;
+
−				break;
+
−			default:
+
−				for(p = sbuf + offset; r > 0; p++, r--, offset++)
+
−					if(*p == '\n' || *p == '\0') {
+
−						*p = '\0';
+
−						strncpy(stext, sbuf, len);
+
−						p += r - 1; /* p is sbuf + offset + r - 1 */
+
−						for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
+
−						offset = r;
+
−						if(r)
+
−							memmove(sbuf, p - r + 1, r);
+
−						break;
+
−					}
+
−				break;
+
−			}
+
−			drawbar();
+
−		}
+
−		while(XPending(dpy)) {
+
−			XNextEvent(dpy, &ev);
+
−			if(handler[ev.type])
+
−				(handler[ev.type])(&ev); /* call handler */
+
−		}
+
−	}
+
−}
+
−
+
−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);
+
−}
+
−
+
−void
+
−setclientstate(Client *c, long state) {
+
−	long data[] = {state, None};
+
−
+
−	XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
+
−			PropModeReplace, (unsigned char *)data, 2);
+
−}
+
−
+
−void
+
−setgeom(const char *arg) {
+
−	unsigned int i;
+
−
+
−	if(!arg) {
+
−		if(++geom == &geoms[LENGTH(geoms)])
+
−			geom = &geoms[0];
+
−	}
+
−	else {
+
−		for(i = 0; i < LENGTH(geoms); i++)
+
−			if(!strcmp(geoms[i].symbol, arg))
+
−				break;
+
−		if(i == LENGTH(geoms))
+
−			return;
+
−		geom = &geoms[i];
+
−	}
+
−	geom->apply();
+
−	updatebarpos();
+
−	arrange();
+
−}
+
−
+
−void
+
−setlayout(const char *arg) {
+
−	unsigned int i;
+
−
+
−	if(!arg) {
+
−		if(++lt == &layouts[LENGTH(layouts)])
+
−			lt = &layouts[0];
+
−	}
+
−	else {
+
−		for(i = 0; i < LENGTH(layouts); i++)
+
−			if(!strcmp(arg, layouts[i].symbol))
+
−				break;
+
−		if(i == LENGTH(layouts))
+
−			return;
+
−		lt = &layouts[i];
+
−	}
+
−	if(sel)
+
−		arrange();
+
−	else
+
−		drawbar();
+
−}
+
−
+
−void
+
−setmfact(const char *arg) {
+
−	double d;
+
−
+
−	if(lt->isfloating)
+
−		return;
+
−	if(!arg)
+
−		mfact = MFACT;
+
−	else {
+
−		d = strtod(arg, NULL);
+
−		if(arg[0] == '-' || arg[0] == '+')
+
−			d += mfact;
+
−		if(d < 0.1 || d > 0.9)
+
−			return;
+
−		mfact = d;
+
−	}
+
−	setgeom(geom->symbol);
+
−}
+
−
+
−void
+
−setup(void) {
+
−	unsigned int i, w;
+
−	XSetWindowAttributes wa;
+
−
+
−	/* init screen */
+
−	screen = DefaultScreen(dpy);
+
−	root = RootWindow(dpy, screen);
+
−	initfont(FONT);
+
−
+
−	/* apply default geometry */
+
−	sx = 0;
+
−	sy = 0;
+
−	sw = DisplayWidth(dpy, screen);
+
−	sh = DisplayHeight(dpy, screen);
+
−	bh = dc.font.height + 2;
+
−	mfact = MFACT;
+
−	geom = &geoms[0];
+
−	geom->apply();
+
−
+
−	/* init atoms */
+
−	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
+
−	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+
−	wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
+
−	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
+
−	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
+
−	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
+
−
+
−	/* init cursors */
+
−	wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
+
−	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
+
−	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
+
−
+
−	/* init appearance */
+
−	dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
+
−	dc.norm[ColBG] = getcolor(NORMBGCOLOR);
+
−	dc.norm[ColFG] = getcolor(NORMFGCOLOR);
+
−	dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
+
−	dc.sel[ColBG] = getcolor(SELBGCOLOR);
+
−	dc.sel[ColFG] = getcolor(SELFGCOLOR);
+
−	initfont(FONT);
+
−	dc.h = bh;
+
−	dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), 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);
+
−
+
−	/* init tags */
+
−	seltags = emallocz(TAGSZ);
+
−	prevtags = emallocz(TAGSZ);
+
−	seltags[0] = prevtags[0] = True;
+
−
+
−	/* init layouts */
+
−	lt = &layouts[0];
+
−
+
−	/* init bar */
+
−	for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
+
−		w = textw(layouts[i].symbol);
+
−		if(w > blw)
+
−			blw = w;
+
−	}
+
−	for(bgw = i = 0; LENGTH(geoms) > 1 && i < LENGTH(geoms); i++) {
+
−		w = textw(geoms[i].symbol);
+
−		if(w > bgw)
+
−			bgw = w;
+
−	}
+
−
+
−	wa.override_redirect = 1;
+
−	wa.background_pixmap = ParentRelative;
+
−	wa.event_mask = ButtonPressMask|ExposureMask;
+
−
+
−	barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
+
−				CopyFromParent, DefaultVisual(dpy, screen),
+
−				CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
+
−	XDefineCursor(dpy, barwin, cursor[CurNormal]);
+
−	XMapRaised(dpy, barwin);
+
−	strcpy(stext, "dwm-"VERSION);
+
−	drawbar();
+
−
+
−	/* EWMH support per view */
+
−	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
+
−			PropModeReplace, (unsigned char *) netatom, NetLast);
+
−
+
−	/* select for events */
+
−	wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
+
−			|EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
+
−	XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
+
−	XSelectInput(dpy, root, wa.event_mask);
+
−
+
−
+
−	/* grab keys */
+
−	grabkeys();
+
−}
+
−
+
−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);
+
−}
+
−
+
−void
+
−tag(const char *arg) {
+
−	unsigned int i;
+
−
+
−	if(!sel)
+
−		return;
+
−	for(i = 0; i < LENGTH(tags); i++)
+
−		sel->tags[i] = (NULL == arg);
+
−	sel->tags[idxoftag(arg)] = True;
+
−	arrange();
+
−}
+
−
+
−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);
+
−}
+
−
+
−unsigned int
+
−textw(const char *text) {
+
−	return textnw(text, strlen(text)) + dc.font.height;
+
−}
+
−
+
−void
+
−tileh(void) {
+
−	int x, w;
+
−	unsigned int i, n = counttiled();
+
−	Client *c;
+
−
+
−	if(n == 0)
+
−		return;
+
−	c = tilemaster(n);
+
−	if(--n == 0)
+
−		return;
+
−
+
−	x = tx;
+
−	w = tw / n;
+
−	if(w < bh)
+
−		w = tw;
+
−
+
−	for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
+
−		if(i + 1 == n) /* remainder */
+
−			tileresize(c, x, ty, (tx + tw) - x - 2 * c->bw, th - 2 * c->bw);
+
−		else
+
−			tileresize(c, x, ty, w - 2 * c->bw, th - 2 * c->bw);
+
−		if(w != tw)
+
−			x = c->x + c->w + 2 * c->bw;
+
−	}
+
−}
+
−
+
−Client *
+
−tilemaster(unsigned int n) {
+
−	Client *c = nexttiled(clients);
+
−
+
−	if(n == 1)
+
−		tileresize(c, mox, moy, mow - 2 * c->bw, moh - 2 * c->bw);
+
−	else
+
−		tileresize(c, mx, my, mw - 2 * c->bw, mh - 2 * c->bw);
+
−	return c;
+
−}
+
−
+
−void
+
−tileresize(Client *c, int x, int y, int w, int h) {
+
−	resize(c, x, y, w, h, RESIZEHINTS);
+
−	if((RESIZEHINTS) && ((c->h < bh) || (c->h > h) || (c->w < bh) || (c->w > w)))
+
−		/* client doesn't accept size constraints */
+
−		resize(c, x, y, w, h, False);
+
−}
+
−
+
−void
+
−tilev(void) {
+
−	int y, h;
+
−	unsigned int i, n = counttiled();
+
−	Client *c;
+
−
+
−	if(n == 0)
+
−		return;
+
−	c = tilemaster(n);
+
−	if(--n == 0)
+
−		return;
+
−
+
−	y = ty;
+
−	h = th / n;
+
−	if(h < bh)
+
−		h = th;
+
−
+
−	for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
+
−		if(i + 1 == n) /* remainder */
+
−			tileresize(c, tx, y, tw - 2 * c->bw, (ty + th) - y - 2 * c->bw);
+
−		else
+
−			tileresize(c, tx, y, tw - 2 * c->bw, h - 2 * c->bw);
+
−		if(h != th)
+
−			y = c->y + c->h + 2 * c->bw;
+
−	}
+
−}
+
−
+
−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
+
−toggletag(const char *arg) {
+
−	unsigned int i, j;
+
−
+
−	if(!sel)
+
−		return;
+
−	i = idxoftag(arg);
+
−	sel->tags[i] = !sel->tags[i];
+
−	for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
+
−	if(j == LENGTH(tags))
+
−		sel->tags[i] = True; /* at least one tag must be enabled */
+
−	arrange();
+
−}
+
−
+
−void
+
−toggleview(const char *arg) {
+
−	unsigned int i, j;
+
−
+
−	i = idxoftag(arg);
+
−	seltags[i] = !seltags[i];
+
−	for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
+
−	if(j == LENGTH(tags))
+
−		seltags[i] = True; /* at least one tag must be viewed */
+
−	arrange();
+
−}
+
−
+
−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->oldbw;
+
−	/* The server grab construct avoids race conditions. */
+
−	XGrabServer(dpy);
+
−	XSetErrorHandler(xerrordummy);
+
−	XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
+
−	detach(c);
+
−	detachstack(c);
+
−	if(sel == c)
+
−		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
+
−unmapnotify(XEvent *e) {
+
−	Client *c;
+
−	XUnmapEvent *ev = &e->xunmap;
+
−
+
−	if((c = getclient(ev->window)))
+
−		unmanage(c);
+
−}
+
−
+
−void
+
−updatebarpos(void) {
+
−
+
−	if(dc.drawable != 0)
+
−		XFreePixmap(dpy, dc.drawable);
+
−	dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
+
−	XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
+
−}
+
−
+
−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);
+
−}
+
−
+
−void
+
−updatewmhints(Client *c) {
+
−	XWMHints *wmh;
+
−
+
−	if((wmh = XGetWMHints(dpy, c->win))) {
+
−		if(c == sel)
+
−			sel->isurgent = False;
+
−		else
+
−			c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
+
−		XFree(wmh);
+
−	}
+
−}
+
−
+
−
+
−void
+
−view(const char *arg) {
+
−	unsigned int i;
+
−
+
−	for(i = 0; i < LENGTH(tags); i++)
+
−		tmp[i] = (NULL == arg);
+
−	tmp[idxoftag(arg)] = True;
+
−
+
−	if(memcmp(seltags, tmp, TAGSZ) != 0) {
+
−		memcpy(prevtags, seltags, TAGSZ);
+
−		memcpy(seltags, tmp, TAGSZ);
+
−		arrange();
+
−	}
+
−}
+
−
+
−void
+
−viewprevtag(const char *arg) {
+
−
+
−	memcpy(tmp, seltags, TAGSZ);
+
−	memcpy(seltags, prevtags, TAGSZ);
+
−	memcpy(prevtags, tmp, TAGSZ);
+
−	arrange();
+
−}
+
−
+
−/* There's no way to check accesses to destroyed windows, thus those cases are
+
− * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
+
− * default error handler, which may call exit.  */
+
−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
+
−xerrordummy(Display *dpy, XErrorEvent *ee) {
+
−	return 0;
+
−}
+
−
+
−/* Startup Error handler to check if another window manager
+
− * is already running. */
+
−int
+
−xerrorstart(Display *dpy, XErrorEvent *ee) {
+
−	otherwm = True;
+
−	return -1;
+
−}
+
−
+
−void
+
−zoom(const char *arg) {
+
−	Client *c = sel;
+
−
+
−	if(!sel || lt->isfloating || sel->isfloating)
+
−		return;
+
−	if(c == nexttiled(clients))
+
−		if(!(c = nexttiled(c->next)))
+
−			return;
+
−	detach(c);
+
−	attach(c);
+
−	focus(c);
+
−	arrange();
+
−}
+
−
+
−int
+
−main(int argc, char *argv[]) {
+
−	if(argc == 2 && !strcmp("-v", argv[1]))
+
−		eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
+
−	else if(argc != 1)
+
−		eprint("usage: dwm [-v]\n");
+
−
+
−	setlocale(LC_CTYPE, "");
+
−	if(!(dpy = XOpenDisplay(0)))
+
−		eprint("dwm: cannot open display\n");
+
−
+
−	checkotherwm();
+
−	setup();
+
−	scan();
+
−	run();
+
−	cleanup();
+
−
+
−	XCloseDisplay(dpy);
+
−	return 0;
+
−}