+
−/* 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 a bit array to indicate the tags of a
+
− * client.
+
− *
+
− * Keys and tagging rules are organized as arrays and defined in config.h.
+
− *
+
− * To understand everything else, start reading main().
+
− */
+
−#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>
+
−#ifdef XINERAMA
+
−#include <X11/extensions/Xinerama.h>
+
−#endif
+
−
+
−/* macros */
+
−#define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
+
−#define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask))
+
−#define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
+
−#define ISVISIBLE(x)            (x->tags & tagset[seltags])
+
−#define LENGTH(x)               (sizeof x / sizeof x[0])
+
−#define MAX(a, b)               ((a) > (b) ? (a) : (b))
+
−#define MIN(a, b)               ((a) < (b) ? (a) : (b))
+
−#define MAXTAGLEN               16
+
−#define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
+
−#define NOBORDER(x)             ((x) - 2 * c->bw)
+
−#define TAGMASK                 ((int)((1LL << LENGTH(tags)) - 1))
+
−#define TEXTW(x)                (textnw(x, strlen(x)) + dc.font.height)
+
−
+
−/* enums */
+
−enum { CurNormal, CurResize, CurMove, CurLast };        /* cursor */
+
−enum { ColBorder, ColFG, ColBG, ColLast };              /* color */
+
−enum { NetSupported, NetWMName, NetLast };              /* EWMH atoms */
+
−enum { WMProtocols, WMDelete, WMState, WMLast };        /* default atoms */
+
−enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
+
−       ClkClientWin, ClkRootWin, ClkLast };             /* clicks */
+
−
+
−typedef union {
+
−	int i;
+
−	unsigned int ui;
+
−	float f;
+
−	void *v;
+
−} Arg;
+
−
+
−typedef struct {
+
−	unsigned int click;
+
−	unsigned int mask;
+
−	unsigned int button;
+
−	void (*func)(const Arg *arg);
+
−	const Arg arg;
+
−} Button;
+
−
+
−typedef struct Client Client;
+
−struct Client {
+
−	char name[256];
+
−	float mina, maxa;
+
−	int x, y, w, h;
+
−	int basew, baseh, incw, inch, maxw, maxh, minw, minh;
+
−	int bw, oldbw;
+
−	unsigned int tags;
+
−	Bool isfixed, isfloating, isurgent;
+
−	Client *next;
+
−	Client *snext;
+
−	Window win;
+
−};
+
−
+
−typedef struct {
+
−	int x, y, w, h;
+
−	unsigned long norm[ColLast];
+
−	unsigned long sel[ColLast];
+
−	Drawable drawable;
+
−	GC gc;
+
−	struct {
+
−		int ascent;
+
−		int descent;
+
−		int height;
+
−		XFontSet set;
+
−		XFontStruct *xfont;
+
−	} font;
+
−} DC; /* draw context */
+
−
+
−typedef struct {
+
−	unsigned int mod;
+
−	KeySym keysym;
+
−	void (*func)(const Arg *);
+
−	const Arg arg;
+
−} Key;
+
−
+
−typedef struct {
+
−	const char *symbol;
+
−	void (*arrange)(void);
+
−} Layout;
+
−
+
−typedef struct {
+
−	const char *class;
+
−	const char *instance;
+
−	const char *title;
+
−	unsigned int tags;
+
−	Bool isfloating;
+
−} Rule;
+
−
+
−/* function declarations */
+
−static void applyrules(Client *c);
+
−static void arrange(void);
+
−static void attach(Client *c);
+
−static void attachstack(Client *c);
+
−static void buttonpress(XEvent *e);
+
−static void checkotherwm(void);
+
−static void cleanup(void);
+
−static void clearurgent(void);
+
−static void configure(Client *c);
+
−static void configurenotify(XEvent *e);
+
−static void configurerequest(XEvent *e);
+
−static void destroynotify(XEvent *e);
+
−static void detach(Client *c);
+
−static void detachstack(Client *c);
+
−static void die(const char *errstr, ...);
+
−static void drawbar(void);
+
−static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
+
−static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
+
−static void enternotify(XEvent *e);
+
−static void expose(XEvent *e);
+
−static void focus(Client *c);
+
−static void focusin(XEvent *e);
+
−static void focusstack(const Arg *arg);
+
−static Client *getclient(Window w);
+
−static unsigned long getcolor(const char *colstr);
+
−static long getstate(Window w);
+
−static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
+
−static void grabbuttons(Client *c, Bool focused);
+
−static void grabkeys(void);
+
−static void initfont(const char *fontstr);
+
−static Bool isprotodel(Client *c);
+
−static void keypress(XEvent *e);
+
−static void killclient(const Arg *arg);
+
−static void manage(Window w, XWindowAttributes *wa);
+
−static void mappingnotify(XEvent *e);
+
−static void maprequest(XEvent *e);
+
−static void monocle(void);
+
−static void movemouse(const Arg *arg);
+
−static Client *nexttiled(Client *c);
+
−static void propertynotify(XEvent *e);
+
−static void quit(const Arg *arg);
+
−static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
+
−static void resizemouse(const Arg *arg);
+
−static void restack(void);
+
−static void run(void);
+
−static void scan(void);
+
−static void setclientstate(Client *c, long state);
+
−static void setlayout(const Arg *arg);
+
−static void setmfact(const Arg *arg);
+
−static void setup(void);
+
−static void showhide(Client *c);
+
−static void spawn(const Arg *arg);
+
−static void tag(const Arg *arg);
+
−static int textnw(const char *text, unsigned int len);
+
−static void tile(void);
+
−static void togglebar(const Arg *arg);
+
−static void togglefloating(const Arg *arg);
+
−static void toggletag(const Arg *arg);
+
−static void toggleview(const Arg *arg);
+
−static void unmanage(Client *c);
+
−static void unmapnotify(XEvent *e);
+
−static void updatebar(void);
+
−static void updategeom(void);
+
−static void updatenumlockmask(void);
+
−static void updatesizehints(Client *c);
+
−static void updatetitle(Client *c);
+
−static void updatewmhints(Client *c);
+
−static void view(const Arg *arg);
+
−static int xerror(Display *dpy, XErrorEvent *ee);
+
−static int xerrordummy(Display *dpy, XErrorEvent *ee);
+
−static int xerrorstart(Display *dpy, XErrorEvent *ee);
+
−static void zoom(const Arg *arg);
+
−
+
−/* variables */
+
−static char stext[256];
+
−static int screen;
+
−static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */ 
+
−static int by, bh, blw;    /* bar geometry y, height and layout symbol width */
+
−static int wx, wy, ww, wh; /* window area geometry x, y, width, height, bar excluded */
+
−static unsigned int seltags = 0, sellt = 0;
+
−static int (*xerrorxlib)(Display *, XErrorEvent *);
+
−static unsigned int numlockmask = 0;
+
−static 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
+
−};
+
−static Atom wmatom[WMLast], netatom[NetLast];
+
−static Bool otherwm;
+
−static Bool running = True;
+
−static Client *clients = NULL;
+
−static Client *sel = NULL;
+
−static Client *stack = NULL;
+
−static Cursor cursor[CurLast];
+
−static Display *dpy;
+
−static DC dc;
+
−static Layout *lt[] = { NULL, NULL };
+
−static Window root, barwin;
+
−/* configuration, allows nested code to access above variables */
+
−#include "config.h"
+
−
+
−/* compile-time check if all tags fit into an unsigned int bit array. */
+
−struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
+
−
+
−/* function implementations */
+
−void
+
−applyrules(Client *c) {
+
−	unsigned int i;
+
−	Rule *r;
+
−	XClassHint ch = { 0 };
+
−
+
−	/* rule matching */
+
−	if(XGetClassHint(dpy, c->win, &ch)) {
+
−		for(i = 0; i < LENGTH(rules); i++) {
+
−			r = &rules[i];
+
−			if((!r->title || strstr(c->name, r->title))
+
−			&& (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
+
−			&& (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
+
−				c->isfloating = r->isfloating;
+
−				c->tags |= r->tags & TAGMASK;
+
−			}
+
−		}
+
−		if(ch.res_class)
+
−			XFree(ch.res_class);
+
−		if(ch.res_name)
+
−			XFree(ch.res_name);
+
−	}
+
−	if(!c->tags)
+
−		c->tags = tagset[seltags];
+
−}
+
−
+
−void
+
−arrange(void) {
+
−	showhide(stack);
+
−	focus(NULL);
+
−	if(lt[sellt]->arrange)
+
−		lt[sellt]->arrange();
+
−	restack();
+
−}
+
−
+
−void
+
−attach(Client *c) {
+
−	c->next = clients;
+
−	clients = c;
+
−}
+
−
+
−void
+
−attachstack(Client *c) {
+
−	c->snext = stack;
+
−	stack = c;
+
−}
+
−
+
−void
+
−buttonpress(XEvent *e) {
+
−	unsigned int i, x, click;
+
−	Arg arg = {0};
+
−	Client *c;
+
−	XButtonPressedEvent *ev = &e->xbutton;
+
−
+
−	click = ClkRootWin;
+
−	if(ev->window == barwin) {
+
−		i = x = 0;
+
−		do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
+
−		if(i < LENGTH(tags)) {
+
−			click = ClkTagBar;
+
−			arg.ui = 1 << i;
+
−		}
+
−		else if(ev->x < x + blw)
+
−			click = ClkLtSymbol;
+
−		else if(ev->x > wx + ww - TEXTW(stext))
+
−			click = ClkStatusText;
+
−		else
+
−			click = ClkWinTitle;
+
−	}
+
−	else if((c = getclient(ev->window))) {
+
−		focus(c);
+
−		click = ClkClientWin;
+
−	}
+
−
+
−	for(i = 0; i < LENGTH(buttons); i++)
+
−		if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
+
−		   && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
+
−			buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
+
−}
+
−
+
−void
+
−checkotherwm(void) {
+
−	otherwm = False;
+
−	xerrorxlib = XSetErrorHandler(xerrorstart);
+
−
+
−	/* this causes an error if some other window manager is running */
+
−	XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
+
−	XSync(dpy, False);
+
−	if(otherwm)
+
−		die("dwm: another window manager is already running\n");
+
−	XSetErrorHandler(xerror);
+
−	XSync(dpy, False);
+
−}
+
−
+
−void
+
−cleanup(void) {
+
−	Arg a = {.ui = ~0};
+
−	Layout foo = { "", NULL };
+
−
+
−	close(STDIN_FILENO);
+
−	view(&a);
+
−	lt[sellt] = &foo;
+
−	while(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
+
−clearurgent(void) {
+
−	XWMHints *wmh;
+
−	Client *c;
+
−
+
−	for(c = clients; c; c = c->next)
+
−		if(ISVISIBLE(c) && c->isurgent) {
+
−			c->isurgent = False;
+
−			if (!(wmh = XGetWMHints(dpy, c->win)))
+
−				continue;
+
−
+
−			wmh->flags &= ~XUrgencyHint;
+
−			XSetWMHints(dpy, c->win, wmh);
+
−			XFree(wmh);
+
−		}
+
−}
+
−
+
−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;
+
−		updategeom();
+
−		updatebar();
+
−		arrange();
+
−	}
+
−}
+
−
+
−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;
+
−		else if(c->isfloating || !lt[sellt]->arrange) {
+
−			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);
+
−}
+
−
+
−void
+
−destroynotify(XEvent *e) {
+
−	Client *c;
+
−	XDestroyWindowEvent *ev = &e->xdestroywindow;
+
−
+
−	if((c = getclient(ev->window)))
+
−		unmanage(c);
+
−}
+
−
+
−void
+
−detach(Client *c) {
+
−	Client **tc;
+
−
+
−	for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
+
−	*tc = c->next;
+
−}
+
−
+
−void
+
−detachstack(Client *c) {
+
−	Client **tc;
+
−
+
−	for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
+
−	*tc = c->snext;
+
−}
+
−
+
−void
+
−die(const char *errstr, ...) {
+
−	va_list ap;
+
−
+
−	va_start(ap, errstr);
+
−	vfprintf(stderr, errstr, ap);
+
−	va_end(ap);
+
−	exit(EXIT_FAILURE);
+
−}
+
−
+
−void
+
−drawbar(void) {
+
−	int x;
+
−	unsigned int i, occ = 0, urg = 0;
+
−	unsigned long *col;
+
−	Client *c;
+
−
+
−	for(c = clients; c; c = c->next) {
+
−		occ |= c->tags;
+
−		if(c->isurgent)
+
−			urg |= c->tags;
+
−	}
+
−
+
−	dc.x = 0;
+
−	for(i = 0; i < LENGTH(tags); i++) {
+
−		dc.w = TEXTW(tags[i]);
+
−		col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
+
−		drawtext(tags[i], col, urg & 1 << i);
+
−		drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
+
−		dc.x += dc.w;
+
−	}
+
−	if(blw > 0) {
+
−		dc.w = blw;
+
−		drawtext(lt[sellt]->symbol, dc.norm, False);
+
−		x = dc.x + dc.w;
+
−	}
+
−	else
+
−		x = dc.x;
+
−	dc.w = TEXTW(stext);
+
−	dc.x = ww - dc.w;
+
−	if(dc.x < x) {
+
−		dc.x = x;
+
−		dc.w = ww - x;
+
−	}
+
−	drawtext(stext, dc.norm, False);
+
−	if((dc.w = dc.x - x) > bh) {
+
−		dc.x = x;
+
−		if(sel) {
+
−			drawtext(sel->name, dc.sel, False);
+
−			drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
+
−		}
+
−		else
+
−			drawtext(NULL, dc.norm, False);
+
−	}
+
−	XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, 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) {
+
−	char buf[256];
+
−	int i, x, y, h, 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;
+
−	olen = strlen(text);
+
−	h = dc.font.ascent + dc.font.descent;
+
−	y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
+
−	x = dc.x + (h / 2);
+
−	/* shorten text if necessary */
+
−	for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
+
−	if(!len)
+
−		return;
+
−	memcpy(buf, text, len);
+
−	if(len < olen)
+
−		for(i = len; i && i > len - 3; buf[--i] = '.');
+
−	XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
+
−	if(dc.font.set)
+
−		XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
+
−	else
+
−		XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
+
−}
+
−
+
−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
+
−expose(XEvent *e) {
+
−	XExposeEvent *ev = &e->xexpose;
+
−
+
−	if(ev->count == 0 && (ev->window == barwin))
+
−		drawbar();
+
−}
+
−
+
−void
+
−focus(Client *c) {
+
−	if(!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);
+
−		XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
+
−		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
+
−	}
+
−	else
+
−		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
+
−	sel = c;
+
−	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
+
−focusstack(const Arg *arg) {
+
−	Client *c = NULL, *i;
+
−
+
−	if(!sel)
+
−		return;
+
−	if (arg->i > 0) {
+
−		for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
+
−		if(!c)
+
−			for(c = clients; c && !ISVISIBLE(c); c = c->next);
+
−	}
+
−	else {
+
−		for(i = clients; i != sel; i = i->next)
+
−			if(ISVISIBLE(i))
+
−				c = i;
+
−		if(!c)
+
−			for(; i; i = i->next)
+
−				if(ISVISIBLE(i))
+
−					c = i;
+
−	}
+
−	if(c) {
+
−		focus(c);
+
−		restack();
+
−	}
+
−}
+
−
+
−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))
+
−		die("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) {
+
−	updatenumlockmask();
+
−	{
+
−		unsigned int i, j;
+
−		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
+
−		XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
+
−		if(focused) {
+
−			for(i = 0; i < LENGTH(buttons); i++)
+
−				if(buttons[i].click == ClkClientWin)
+
−					for(j = 0; j < LENGTH(modifiers); j++)
+
−						XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
+
−		} else
+
−			XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
+
−			            BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
+
−	}
+
−}
+
−
+
−void
+
−grabkeys(void) {
+
−	updatenumlockmask();
+
−	{ /* grab keys */
+
−		unsigned int i, j;
+
−		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
+
−		KeyCode code;
+
−
+
−		XUngrabKey(dpy, AnyKey, AnyModifier, root);
+
−		for(i = 0; i < LENGTH(keys); i++) {
+
−			if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
+
−				for(j = 0; j < LENGTH(modifiers); j++)
+
−					XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
+
−						 True, GrabModeAsync, GrabModeAsync);
+
−		}
+
−	}
+
−}
+
−
+
−void
+
−initfont(const char *fontstr) {
+
−	char *def, **missing;
+
−	int i, n;
+
−
+
−	missing = NULL;
+
−	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++) {
+
−			dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
+
−			dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
+
−			xfonts++;
+
−		}
+
−	}
+
−	else {
+
−		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
+
−		&& !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
+
−			die("error, cannot load font: '%s'\n", fontstr);
+
−		dc.font.ascent = dc.font.xfont->ascent;
+
−		dc.font.descent = dc.font.xfont->descent;
+
−	}
+
−	dc.font.height = dc.font.ascent + dc.font.descent;
+
−}
+
−
+
−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;
+
−}
+
−
+
−void
+
−keypress(XEvent *e) {
+
−	unsigned int i;
+
−	KeySym keysym;
+
−	XKeyEvent *ev;
+
−
+
−	ev = &e->xkey;
+
−	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
+
−	for(i = 0; i < LENGTH(keys); i++)
+
−		if(keysym == keys[i].keysym
+
−		   && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
+
−		   && keys[i].func)
+
−			keys[i].func(&(keys[i].arg));
+
−}
+
−
+
−void
+
−killclient(const Arg *arg) {
+
−	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) {
+
−	static Client cz;
+
−	Client *c, *t = NULL;
+
−	Window trans = None;
+
−	XWindowChanges wc;
+
−
+
−	if(!(c = malloc(sizeof(Client))))
+
−		die("fatal: could not malloc() %u bytes\n", sizeof(Client));
+
−	*c = cz;
+
−	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 = 0;
+
−	}
+
−	else {
+
−		if(c->x + c->w + 2 * c->bw > sx + sw)
+
−			c->x = sx + sw - NOBORDER(c->w);
+
−		if(c->y + c->h + 2 * c->bw > sy + sh)
+
−			c->y = sy + sh - NOBORDER(c->h);
+
−		c->x = MAX(c->x, sx);
+
−		/* only fix client y-offset, if the client center might cover the bar */
+
−		c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
+
−		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(XGetTransientForHint(dpy, w, &trans))
+
−		t = getclient(trans);
+
−	if(t)
+
−		c->tags = t->tags;
+
−	else
+
−		applyrules(c);
+
−	if(!c->isfloating)
+
−		c->isfloating = trans != None || c->isfixed;
+
−	if(c->isfloating)
+
−		XRaiseWindow(dpy, c->win);
+
−	attach(c);
+
−	attachstack(c);
+
−	XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
+
−	XMapWindow(dpy, c->win);
+
−	setclientstate(c, NormalState);
+
−	arrange();
+
−}
+
−
+
−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 = nexttiled(clients); c; c = nexttiled(c->next))
+
−		resize(c, wx, wy, NOBORDER(ww), NOBORDER(wh), resizehints);
+
−}
+
−
+
−void
+
−movemouse(const Arg *arg) {
+
−	int x, y, ocx, ocy, di, nx, ny;
+
−	unsigned int dui;
+
−	Client *c;
+
−	Window dummy;
+
−	XEvent ev;
+
−
+
−	if(!(c = sel))
+
−		return;
+
−	restack();
+
−	ocx = c->x;
+
−	ocy = c->y;
+
−	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
+
−	None, cursor[CurMove], CurrentTime) != GrabSuccess)
+
−		return;
+
−	XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
+
−	do {
+
−		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
+
−		switch (ev.type) {
+
−		case ConfigureRequest:
+
−		case Expose:
+
−		case MapRequest:
+
−			handler[ev.type](&ev);
+
−			break;
+
−		case MotionNotify:
+
−			XSync(dpy, False);
+
−			nx = ocx + (ev.xmotion.x - x);
+
−			ny = ocy + (ev.xmotion.y - y);
+
−			if(snap && nx >= wx && nx <= wx + ww
+
−			        && ny >= wy && ny <= wy + wh) {
+
−				if(abs(wx - nx) < snap)
+
−					nx = wx;
+
−				else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
+
−					nx = wx + ww - NOBORDER(c->w);
+
−				if(abs(wy - ny) < snap)
+
−					ny = wy;
+
−				else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
+
−					ny = wy + wh - NOBORDER(c->h);
+
−				if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
+
−					togglefloating(NULL);
+
−			}
+
−			if(!lt[sellt]->arrange || c->isfloating)
+
−				resize(c, nx, ny, c->w, c->h, False);
+
−			break;
+
−		}
+
−	}
+
−	while(ev.type != ButtonRelease);
+
−	XUngrabPointer(dpy, CurrentTime);
+
−}
+
−
+
−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 Arg *arg) {
+
−	readin = running = False;
+
−}
+
−
+
−void
+
−resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
+
−	XWindowChanges wc;
+
−
+
−	if(sizehints) {
+
−		/* see last two sentences in ICCCM 4.1.2.3 */
+
−		Bool baseismin = c->basew == c->minw && c->baseh == c->minh;
+
−
+
−		/* set minimum possible */
+
−		w = MAX(1, w);
+
−		h = MAX(1, h);
+
−
+
−		if(!baseismin) { /* temporarily remove base dimensions */
+
−			w -= c->basew;
+
−			h -= c->baseh;
+
−		}
+
−
+
−		/* adjust for aspect limits */
+
−		if(c->mina > 0 && c->maxa > 0) {
+
−			if(c->maxa < (float)w / h)
+
−				w = h * c->maxa;
+
−			else if(c->mina < (float)h / w)
+
−				h = w * c->mina;
+
−		}
+
−
+
−		if(baseismin) { /* increment calculation requires this */
+
−			w -= c->basew;
+
−			h -= c->baseh;
+
−		}
+
−
+
−		/* adjust for increment value */
+
−		if(c->incw)
+
−			w -= w % c->incw;
+
−		if(c->inch)
+
−			h -= h % c->inch;
+
−
+
−		/* restore base dimensions */
+
−		w += c->basew;
+
−		h += c->baseh;
+
−
+
−		w = MAX(w, c->minw);
+
−		h = MAX(h, c->minh);
+
−
+
−		if(c->maxw)
+
−			w = MIN(w, c->maxw);
+
−
+
−		if(c->maxh)
+
−			h = MIN(h, c->maxh);
+
−	}
+
−	if(w <= 0 || h <= 0)
+
−		return;
+
−	if(x > sx + sw)
+
−		x = sw - NOBORDER(w);
+
−	if(y > sy + sh)
+
−		y = sh - NOBORDER(h);
+
−	if(x + w + 2 * c->bw < sx)
+
−		x = sx;
+
−	if(y + h + 2 * c->bw < sy)
+
−		y = sy;
+
−	if(h < bh)
+
−		h = bh;
+
−	if(w < bh)
+
−		w = bh;
+
−	if(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(const Arg *arg) {
+
−	int ocx, ocy;
+
−	int nw, nh;
+
−	Client *c;
+
−	XEvent ev;
+
−
+
−	if(!(c = sel))
+
−		return;
+
−	restack();
+
−	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);
+
−	do {
+
−		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
+
−		switch(ev.type) {
+
−		case ConfigureRequest:
+
−		case Expose:
+
−		case MapRequest:
+
−			handler[ev.type](&ev);
+
−			break;
+
−		case MotionNotify:
+
−			XSync(dpy, False);
+
−			nw = MAX(ev.xmotion.x - NOBORDER(ocx) + 1, 1);
+
−			nh = MAX(ev.xmotion.y - NOBORDER(ocy) + 1, 1);
+
−
+
−			if(snap && nw >= wx && nw <= wx + ww
+
−			        && nh >= wy && nh <= wy + wh) {
+
−				if(!c->isfloating && lt[sellt]->arrange
+
−				   && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
+
−					togglefloating(NULL);
+
−			}
+
−			if(!lt[sellt]->arrange || c->isfloating)
+
−				resize(c, c->x, c->y, nw, nh, True);
+
−			break;
+
−		}
+
−	}
+
−	while(ev.type != ButtonRelease);
+
−	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
+
−	XUngrabPointer(dpy, CurrentTime);
+
−	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+
−}
+
−
+
−void
+
−restack(void) {
+
−	Client *c;
+
−	XEvent ev;
+
−	XWindowChanges wc;
+
−
+
−	drawbar();
+
−	if(!sel)
+
−		return;
+
−	if(sel->isfloating || !lt[sellt]->arrange)
+
−		XRaiseWindow(dpy, sel->win);
+
−	if(lt[sellt]->arrange) {
+
−		wc.stack_mode = Below;
+
−		wc.sibling = barwin;
+
−		for(c = stack; c; c = c->snext)
+
−			if(!c->isfloating && ISVISIBLE(c)) {
+
−				XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
+
−				wc.sibling = c->win;
+
−			}
+
−	}
+
−	XSync(dpy, False);
+
−	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+
−}
+
−
+
−void
+
−run(void) {
+
−	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);
+
−	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;
+
−			die("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 d1, d2, *wins = NULL;
+
−	XWindowAttributes wa;
+
−
+
−	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
+
−		for(i = 0; i < num; i++) {
+
−			if(!XGetWindowAttributes(dpy, wins[i], &wa)
+
−			|| wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
+
−				continue;
+
−			if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
+
−				manage(wins[i], &wa);
+
−		}
+
−		for(i = 0; i < num; i++) { /* now the transients */
+
−			if(!XGetWindowAttributes(dpy, wins[i], &wa))
+
−				continue;
+
−			if(XGetTransientForHint(dpy, wins[i], &d1)
+
−			&& (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
+
−				manage(wins[i], &wa);
+
−		}
+
−		if(wins)
+
−			XFree(wins);
+
−	}
+
−}
+
−
+
−void
+
−setclientstate(Client *c, long state) {
+
−	long data[] = {state, None};
+
−
+
−	XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
+
−			PropModeReplace, (unsigned char *)data, 2);
+
−}
+
−
+
−void
+
−setlayout(const Arg *arg) {
+
−	if(!arg || !arg->v || arg->v != lt[sellt])
+
−		sellt ^= 1;
+
−	if(arg && arg->v)
+
−		lt[sellt] = (Layout *)arg->v;
+
−	if(sel)
+
−		arrange();
+
−	else
+
−		drawbar();
+
−}
+
−
+
−/* arg > 1.0 will set mfact absolutly */
+
−void
+
−setmfact(const Arg *arg) {
+
−	float f;
+
−
+
−	if(!arg || !lt[sellt]->arrange)
+
−		return;
+
−	f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
+
−	if(f < 0.1 || f > 0.9)
+
−		return;
+
−	mfact = f;
+
−	arrange();
+
−}
+
−
+
−void
+
−setup(void) {
+
−	unsigned int i;
+
−	int w;
+
−	XSetWindowAttributes wa;
+
−
+
−	/* init screen */
+
−	screen = DefaultScreen(dpy);
+
−	root = RootWindow(dpy, screen);
+
−	initfont(font);
+
−	sx = 0;
+
−	sy = 0;
+
−	sw = DisplayWidth(dpy, screen);
+
−	sh = DisplayHeight(dpy, screen);
+
−	bh = dc.h = dc.font.height + 2;
+
−	lt[0] = &layouts[0];
+
−	lt[1] = &layouts[1 % LENGTH(layouts)];
+
−	updategeom();
+
−
+
−	/* init atoms */
+
−	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
+
−	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+
−	wmatom[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);
+
−	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 bar */
+
−	for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
+
−		w = TEXTW(layouts[i].symbol);
+
−		blw = MAX(blw, w);
+
−	}
+
−
+
−	wa.override_redirect = 1;
+
−	wa.background_pixmap = ParentRelative;
+
−	wa.event_mask = ButtonPressMask|ExposureMask;
+
−
+
−	barwin = XCreateWindow(dpy, root, wx, by, ww, 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|ButtonPressMask
+
−			|EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
+
−	XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
+
−	XSelectInput(dpy, root, wa.event_mask);
+
−
+
−	grabkeys();
+
−}
+
−
+
−void
+
−showhide(Client *c) {
+
−	if(!c)
+
−		return;
+
−	if(ISVISIBLE(c)) { /* show clients top down */
+
−		XMoveWindow(dpy, c->win, c->x, c->y);
+
−		if(!lt[sellt]->arrange || c->isfloating)
+
−			resize(c, c->x, c->y, c->w, c->h, True);
+
−		showhide(c->snext);
+
−	}
+
−	else { /* hide clients bottom up */
+
−		showhide(c->snext);
+
−		XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
+
−	}
+
−}
+
−
+
−void
+
−spawn(const Arg *arg) {
+
−	/* 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();
+
−			execvp(((char **)arg->v)[0], (char **)arg->v);
+
−			fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
+
−			perror(" failed");
+
−		}
+
−		exit(0);
+
−	}
+
−	wait(0);
+
−}
+
−
+
−void
+
−tag(const Arg *arg) {
+
−	if(sel && arg->ui & TAGMASK) {
+
−		sel->tags = arg->ui & TAGMASK;
+
−		arrange();
+
−	}
+
−}
+
−
+
−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);
+
−}
+
−
+
−void
+
−tile(void) {
+
−	int x, y, h, w, mw;
+
−	unsigned int i, n;
+
−	Client *c;
+
−
+
−	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
+
−	if(n == 0)
+
−		return;
+
−
+
−	/* master */
+
−	c = nexttiled(clients);
+
−	mw = mfact * ww;
+
−	resize(c, wx, wy, NOBORDER(n == 1 ? ww : mw), NOBORDER(wh), resizehints);
+
−
+
−	if(--n == 0)
+
−		return;
+
−
+
−	/* tile stack */
+
−	x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
+
−	y = wy;
+
−	w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
+
−	h = wh / n;
+
−	if(h < bh)
+
−		h = wh;
+
−
+
−	for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
+
−		resize(c, x, y, NOBORDER(w), /* remainder */ ((i + 1 == n)
+
−		       ? NOBORDER(wy + wh) - y : h), resizehints);
+
−		if(h != wh)
+
−			y = c->y + c->h + 2 * c->bw;
+
−	}
+
−}
+
−
+
−void
+
−togglebar(const Arg *arg) {
+
−	showbar = !showbar;
+
−	updategeom();
+
−	updatebar();
+
−	arrange();
+
−}
+
−
+
−void
+
−togglefloating(const Arg *arg) {
+
−	if(!sel)
+
−		return;
+
−	sel->isfloating = !sel->isfloating || sel->isfixed;
+
−	if(sel->isfloating)
+
−		resize(sel, sel->x, sel->y, sel->w, sel->h, True);
+
−	arrange();
+
−}
+
−
+
−void
+
−toggletag(const Arg *arg) {
+
−	unsigned int mask;
+
−
+
−	if (!sel)
+
−		return;
+
−	
+
−	mask = sel->tags ^ (arg->ui & TAGMASK);
+
−	if(sel && mask) {
+
−		sel->tags = mask;
+
−		arrange();
+
−	}
+
−}
+
−
+
−void
+
−toggleview(const Arg *arg) {
+
−	unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
+
−
+
−	if(mask) {
+
−		tagset[seltags] = mask;
+
−		clearurgent();
+
−		arrange();
+
−	}
+
−}
+
−
+
−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);
+
−	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
+
−updatebar(void) {
+
−	if(dc.drawable != 0)
+
−		XFreePixmap(dpy, dc.drawable);
+
−	dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
+
−	XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
+
−}
+
−
+
−void
+
−updategeom(void) {
+
−#ifdef XINERAMA
+
−	int n, i = 0;
+
−	XineramaScreenInfo *info = NULL;
+
−
+
−	/* window area geometry */
+
−	if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) { 
+
−		if(n > 1) {
+
−			int di, x, y;
+
−			unsigned int dui;
+
−			Window dummy;
+
−			if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
+
−				for(i = 0; i < n; i++)
+
−					if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
+
−						break;
+
−		}
+
−		wx = info[i].x_org;
+
−		wy = showbar && topbar ?  info[i].y_org + bh : info[i].y_org;
+
−		ww = info[i].width;
+
−		wh = showbar ? info[i].height - bh : info[i].height;
+
−		XFree(info);
+
−	}
+
−	else
+
−#endif
+
−	{
+
−		wx = sx;
+
−		wy = showbar && topbar ? sy + bh : sy;
+
−		ww = sw;
+
−		wh = showbar ? sh - bh : sh;
+
−	}
+
−
+
−	/* bar position */
+
−	by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
+
−}
+
−
+
−void
+
−updatenumlockmask(void) {
+
−	unsigned int i, j;
+
−	XModifierKeymap *modmap;
+
−
+
−	numlockmask = 0;
+
−	modmap = XGetModifierMapping(dpy);
+
−	for(i = 0; i < 8; i++)
+
−		for(j = 0; j < modmap->max_keypermod; j++)
+
−			if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
+
−				numlockmask = (1 << i);
+
−	XFreeModifiermap(modmap);
+
−}
+
−
+
−void
+
−updatesizehints(Client *c) {
+
−	long msize;
+
−	XSizeHints size;
+
−
+
−	if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
+
−		/* size is uninitialized, ensure that size.flags aren't used */
+
−		size.flags = PSize; 
+
−	if(size.flags & PBaseSize) {
+
−		c->basew = size.base_width;
+
−		c->baseh = size.base_height;
+
−	}
+
−	else if(size.flags & PMinSize) {
+
−		c->basew = size.min_width;
+
−		c->baseh = size.min_height;
+
−	}
+
−	else
+
−		c->basew = c->baseh = 0;
+
−	if(size.flags & PResizeInc) {
+
−		c->incw = size.width_inc;
+
−		c->inch = size.height_inc;
+
−	}
+
−	else
+
−		c->incw = c->inch = 0;
+
−	if(size.flags & PMaxSize) {
+
−		c->maxw = size.max_width;
+
−		c->maxh = size.max_height;
+
−	}
+
−	else
+
−		c->maxw = c->maxh = 0;
+
−	if(size.flags & PMinSize) {
+
−		c->minw = size.min_width;
+
−		c->minh = size.min_height;
+
−	}
+
−	else if(size.flags & PBaseSize) {
+
−		c->minw = size.base_width;
+
−		c->minh = size.base_height;
+
−	}
+
−	else
+
−		c->minw = c->minh = 0;
+
−	if(size.flags & PAspect) {
+
−		c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
+
−		c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
+
−	}
+
−	else
+
−		c->maxa = c->mina = 0.0;
+
−	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, XA_WM_NAME, c->name, sizeof c->name);
+
−}
+
−
+
−void
+
−updatewmhints(Client *c) {
+
−	XWMHints *wmh;
+
−
+
−	if((wmh = XGetWMHints(dpy, c->win))) {
+
−		if(ISVISIBLE(c) && wmh->flags & XUrgencyHint) {
+
−			wmh->flags &= ~XUrgencyHint;
+
−			XSetWMHints(dpy, c->win, wmh);
+
−		}
+
−		else
+
−			c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
+
−
+
−		XFree(wmh);
+
−	}
+
−}
+
−
+
−void
+
−view(const Arg *arg) {
+
−	if((arg->ui & TAGMASK) == tagset[seltags])
+
−		return;
+
−	seltags ^= 1; /* toggle sel tagset */
+
−	if(arg->ui & TAGMASK)
+
−		tagset[seltags] = arg->ui & TAGMASK;
+
−	clearurgent();
+
−	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_GrabButton && ee->error_code == BadAccess)
+
−	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
+
−	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
+
−		return 0;
+
−	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
+
−			ee->request_code, ee->error_code);
+
−	return xerrorxlib(dpy, ee); /* may call exit */
+
−}
+
−
+
−int
+
−xerrordummy(Display *dpy, XErrorEvent *ee) {
+
−	return 0;
+
−}
+
−
+
−/* Startup Error handler to check if another window manager
+
− * is already running. */
+
−int
+
−xerrorstart(Display *dpy, XErrorEvent *ee) {
+
−	otherwm = True;
+
−	return -1;
+
−}
+
−
+
−void
+
−zoom(const Arg *arg) {
+
−	Client *c = sel;
+
−
+
−	if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
+
−		return;
+
−	if(c == nexttiled(clients))
+
−		if(!c || !(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]))
+
−		die("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
+
−	else if(argc != 1)
+
−		die("usage: dwm [-v]\n");
+
−
+
−	if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
+
−		fprintf(stderr, "warning: no locale support\n");
+
−
+
−	if(!(dpy = XOpenDisplay(0)))
+
−		die("dwm: cannot open display\n");
+
−
+
−	checkotherwm();
+
−	setup();
+
−	scan();
+
−	run();
+
−	cleanup();
+
−
+
−	XCloseDisplay(dpy);
+
−	return 0;
+
−}