X-Git-Url: https://jasonwoof.com/gitweb/?p=dwm.git;a=blobdiff_plain;f=dwm.c;h=3ae709b827cdac655ee2b39c46c7ca59afd4b038;hp=10416f8dadb6dc0ceb2030a66517bed7a66e9183;hb=ea0008cba24b57f7955541568c8c527c06329ccd;hpb=840f937a9876091aef227316b7eb2db0f9e5255e

diff --git a/dwm.c b/dwm.c
index 10416f8..3ae709b 100644
--- a/dwm.c
+++ b/dwm.c
@@ -6,16 +6,13 @@
  * events about window (dis-)appearance.  Only one X connection at a time is
  * allowed to select for this event mask.
  *
- * Calls to fetch an X event from the event queue are blocking.  Due reading
- * status text from standard input, a select()-driven main loop has been
- * implemented which selects for reads on the X connection and STDIN_FILENO to
- * handle all data smoothly. The event handlers of dwm are organized in an
- * array which is accessed whenever a new event has been fetched. This allows
- * event dispatching in O(1) time.
+ * The event handlers of dwm are organized in an array which is accessed
+ * whenever a new event has been fetched. This allows event dispatching
+ * in O(1) time.
  *
  * Each child of the root window is called a client, except windows which have
  * set the override_redirect flag.  Clients are organized in a global
- * doubly-linked client list, the focus history is remembered through a global
+ * 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.
  *
@@ -24,12 +21,13 @@
  * To understand everything else, start reading main().
  */
 #include <errno.h>
+#include <locale.h>
 #include <stdarg.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <sys/select.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <X11/cursorfont.h>
@@ -52,6 +50,8 @@
 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
 #define MAXTAGLEN               16
 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
+#define WIDTH(x)                ((x)->w + 2 * (x)->bw)
+#define HEIGHT(x)               ((x)->h + 2 * (x)->bw)
 #define TAGMASK                 ((int)((1LL << LENGTH(tags)) - 1))
 #define TEXTW(x)                (textnw(x, strlen(x)) + dc.font.height)
 
@@ -59,7 +59,7 @@
 enum { CurNormal, CurResize, CurMove, CurLast };        /* cursor */
 enum { ColBorder, ColFG, ColBG, ColLast };              /* color */
 enum { NetSupported, NetWMName, NetLast };              /* EWMH atoms */
-enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
+enum { WMProtocols, WMDelete, WMState, WMLast };        /* default atoms */
 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
        ClkClientWin, ClkRootWin, ClkLast };             /* clicks */
 
@@ -129,13 +129,14 @@ typedef struct {
 
 /* function declarations */
 static void applyrules(Client *c);
+static void applysizehints(Client *c, int *w, int *h);
 static void arrange(void);
 static void attach(Client *c);
 static void attachstack(Client *c);
 static void buttonpress(XEvent *e);
 static void checkotherwm(void);
 static void cleanup(void);
-static void clearurgent(void);
+static void clearurgent(Client *c);
 static void configure(Client *c);
 static void configurenotify(XEvent *e);
 static void configurerequest(XEvent *e);
@@ -169,7 +170,7 @@ 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 resize(Client *c, int x, int y, int w, int h);
 static void resizemouse(const Arg *arg);
 static void restack(void);
 static void run(void);
@@ -178,6 +179,8 @@ 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, unsigned int ntiled);
+static void sigchld(int signal);
 static void spawn(const Arg *arg);
 static void tag(const Arg *arg);
 static int textnw(const char *text, unsigned int len);
@@ -190,7 +193,9 @@ 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 updatestatus(void);
 static void updatetitle(Client *c);
 static void updatewmhints(Client *c);
 static void view(const Arg *arg);
@@ -225,13 +230,12 @@ static void (*handler[LASTEvent]) (XEvent *) = {
 static Atom wmatom[WMLast], netatom[NetLast];
 static Bool otherwm;
 static Bool running = True;
-static unsigned int tagset[] = {1, 1}; /* after start, first tag is selected */
 static Client *clients = NULL;
 static Client *sel = NULL;
 static Client *stack = NULL;
 static Cursor cursor[CurLast];
 static Display *dpy;
-static DC dc = {0};
+static DC dc;
 static Layout *lt[] = { NULL, NULL };
 static Window root, barwin;
 /* configuration, allows nested code to access above variables */
@@ -248,38 +252,84 @@ applyrules(Client *c) {
 	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))
-		&& (!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(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 ? r->tags & TAGMASK : tagset[seltags]; 
+			}
 		}
+		if(ch.res_class)
+			XFree(ch.res_class);
+		if(ch.res_name)
+			XFree(ch.res_name);
 	}
-	if(ch.res_class)
-		XFree(ch.res_class);
-	if(ch.res_name)
-		XFree(ch.res_name);
 	if(!c->tags)
 		c->tags = tagset[seltags];
 }
 
 void
+applysizehints(Client *c, int *w, int *h) {
+	Bool baseismin;
+
+	if(!resizehints && !c->isfloating)
+		return;
+
+	/* see last two sentences in ICCCM 4.1.2.3 */
+	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);
+}
+
+void
 arrange(void) {
+	unsigned int nt;
 	Client *c;
 
-	for(c = clients; c; c = c->next)
-		if(ISVISIBLE(c)) {
-			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);
-		}
-		else {
-			XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
-		}
-
+	for(nt = 0, c = nexttiled(clients); c; c = nexttiled(c->next), nt++);
+	showhide(stack, nt);
 	focus(NULL);
 	if(lt[sellt]->arrange)
 		lt[sellt]->arrange();
@@ -328,21 +378,20 @@ buttonpress(XEvent *e) {
 	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 ? &arg : &buttons[i].arg);
+			buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 }
 
 void
 checkotherwm(void) {
 	otherwm = False;
-	XSetErrorHandler(xerrorstart);
+	xerrorxlib = XSetErrorHandler(xerrorstart);
 
 	/* this causes an error if some other window manager is running */
 	XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 	XSync(dpy, False);
 	if(otherwm)
 		die("dwm: another window manager is already running\n");
-	XSetErrorHandler(NULL);
-	xerrorxlib = XSetErrorHandler(xerror);
+	XSetErrorHandler(xerror);
 	XSync(dpy, False);
 }
 
@@ -351,7 +400,6 @@ cleanup(void) {
 	Arg a = {.ui = ~0};
 	Layout foo = { "", NULL };
 
-	close(STDIN_FILENO);
 	view(&a);
 	lt[sellt] = &foo;
 	while(stack)
@@ -372,20 +420,15 @@ cleanup(void) {
 }
 
 void
-clearurgent(void) {
+clearurgent(Client *c) {
 	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);
-		}
+	c->isurgent = False;
+	if(!(wmh = XGetWMHints(dpy, c->win)))
+		return;
+	wmh->flags &= ~XUrgencyHint;
+	XSetWMHints(dpy, c->win, wmh);
+	XFree(wmh);
 }
 
 void
@@ -624,6 +667,8 @@ focus(Client *c) {
 		XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 	}
 	if(c) {
+		if(c->isurgent)
+			clearurgent(c);
 		detachstack(c);
 		attachstack(c);
 		grabbuttons(c, True);
@@ -734,42 +779,37 @@ gettextprop(Window w, Atom atom, char *text, unsigned int size) {
 
 void
 grabbuttons(Client *c, Bool focused) {
-	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);
+	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) {
-	unsigned int i, j;
-	unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
-	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);
+	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);
 		}
-	XFreeModifiermap(modmap);
-
-	XUngrabKey(dpy, AnyKey, AnyModifier, root);
-	for(i = 0; i < LENGTH(keys); i++) {
-		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);
 	}
 }
 
@@ -779,8 +819,6 @@ initfont(const char *fontstr) {
 	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--)
@@ -801,9 +839,6 @@ initfont(const char *fontstr) {
 		}
 	}
 	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")))
 			die("error, cannot load font: '%s'\n", fontstr);
@@ -864,12 +899,14 @@ killclient(const Arg *arg) {
 
 void
 manage(Window w, XWindowAttributes *wa) {
+	static Client cz;
 	Client *c, *t = NULL;
 	Window trans = None;
 	XWindowChanges wc;
 
-	if(!(c = calloc(1, sizeof(Client))))
-		die("fatal: could not calloc() %u bytes\n", sizeof(Client));
+	if(!(c = malloc(sizeof(Client))))
+		die("fatal: could not malloc() %u bytes\n", sizeof(Client));
+	*c = cz;
 	c->win = w;
 
 	/* geometry */
@@ -884,10 +921,10 @@ manage(Window w, XWindowAttributes *wa) {
 		c->bw = 0;
 	}
 	else {
-		if(c->x + c->w + 2 * c->bw > sx + sw)
-			c->x = sx + sw - c->w - 2 * c->bw;
-		if(c->y + c->h + 2 * c->bw > sy + sh)
-			c->y = sy + sh - c->h - 2 * c->bw;
+		if(c->x + WIDTH(c) > sx + sw)
+			c->x = sx + sw - WIDTH(c);
+		if(c->y + HEIGHT(c) > sy + sh)
+			c->y = sy + sh - HEIGHT(c);
 		c->x = MAX(c->x, sx);
 		/* only fix client y-offset, if the client center might cover the bar */
 		c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
@@ -946,8 +983,9 @@ void
 monocle(void) {
 	Client *c;
 
-	for(c = nexttiled(clients); c; c = nexttiled(c->next))
-		resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, resizehints);
+	for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
+		resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
+	}
 }
 
 void
@@ -967,6 +1005,8 @@ movemouse(const Arg *arg) {
 	None, cursor[CurMove], CurrentTime) != GrabSuccess)
 		return;
 	XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
+	if(usegrab)
+		XGrabServer(dpy);
 	do {
 		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
 		switch (ev.type) {
@@ -976,28 +1016,29 @@ movemouse(const Arg *arg) {
 			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 - c->w - 2 * c->bw;
+				else if(abs((wx + ww) - (nx + WIDTH(c))) < snap)
+					nx = wx + ww - WIDTH(c);
 				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;
+				else if(abs((wy + wh) - (ny + HEIGHT(c))) < snap)
+					ny = wy + wh - HEIGHT(c);
 				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);
+				resize(c, nx, ny, c->w, c->h);
 			break;
 		}
 	}
 	while(ev.type != ButtonRelease);
+	if(usegrab)
+		XUngrabServer(dpy);
 	XUngrabPointer(dpy, CurrentTime);
 }
 
@@ -1013,9 +1054,11 @@ propertynotify(XEvent *e) {
 	Window trans;
 	XPropertyEvent *ev = &e->xproperty;
 
-	if(ev->state == PropertyDelete)
+	if((ev->window == root) && (ev->atom == XA_WM_NAME))
+		updatestatus();
+	else if(ev->state == PropertyDelete)
 		return; /* ignore */
-	if((c = getclient(ev->window))) {
+	else if((c = getclient(ev->window))) {
 		switch (ev->atom) {
 		default: break;
 		case XA_WM_TRANSIENT_FOR:
@@ -1041,55 +1084,20 @@ propertynotify(XEvent *e) {
 
 void
 quit(const Arg *arg) {
-	readin = running = False;
+	running = False;
 }
 
 void
-resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
+resize(Client *c, int x, int y, int w, int h) {
 	XWindowChanges wc;
 
-	if(sizehints) {
-		/* set minimum possible */
-		w = MAX(1, w);
-		h = MAX(1, h);
-
-		/* 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;
-		}
-
-		/* 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);
-	}
+	applysizehints(c, &w, &h);
 	if(w <= 0 || h <= 0)
 		return;
 	if(x > sx + sw)
-		x = sw - w - 2 * c->bw;
+		x = sw - WIDTH(c);
 	if(y > sy + sh)
-		y = sh - h - 2 * c->bw;
+		y = sh - HEIGHT(c);
 	if(x + w + 2 * c->bw < sx)
 		x = sx;
 	if(y + h + 2 * c->bw < sy)
@@ -1127,6 +1135,8 @@ resizemouse(const Arg *arg) {
 	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);
+	if(usegrab)
+		XGrabServer(dpy);
 	do {
 		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
 		switch(ev.type) {
@@ -1136,7 +1146,6 @@ resizemouse(const Arg *arg) {
 			handler[ev.type](&ev);
 			break;
 		case MotionNotify:
-			XSync(dpy, False);
 			nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
 			nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
 
@@ -1147,11 +1156,13 @@ resizemouse(const Arg *arg) {
 					togglefloating(NULL);
 			}
 			if(!lt[sellt]->arrange || c->isfloating)
-				resize(c, c->x, c->y, nw, nh, True);
+				resize(c, c->x, c->y, nw, nh);
 			break;
 		}
 	}
 	while(ev.type != ButtonRelease);
+	if(usegrab)
+		XUngrabServer(dpy);
 	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));
@@ -1183,60 +1194,13 @@ restack(void) {
 
 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 */
+	/* main event loop */
 	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 */
-		}
+	while(running && !XNextEvent(dpy, &ev)) {
+		if(handler[ev.type])
+			(handler[ev.type])(&ev); /* call handler */
 	}
 }
 
@@ -1322,7 +1286,6 @@ setup(void) {
 	/* 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);
@@ -1340,7 +1303,7 @@ setup(void) {
 	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);
+	dc.gc = XCreateGC(dpy, root, 0, NULL);
 	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 	if(!dc.font.set)
 		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
@@ -1351,7 +1314,7 @@ setup(void) {
 		blw = MAX(blw, w);
 	}
 
-	wa.override_redirect = 1;
+	wa.override_redirect = True;
 	wa.background_pixmap = ParentRelative;
 	wa.event_mask = ButtonPressMask|ExposureMask;
 
@@ -1360,8 +1323,7 @@ setup(void) {
 			CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
 	XDefineCursor(dpy, barwin, cursor[CurNormal]);
 	XMapRaised(dpy, barwin);
-	strcpy(stext, "dwm-"VERSION);
-	drawbar();
+	updatestatus();
 
 	/* EWMH support per view */
 	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
@@ -1369,31 +1331,48 @@ setup(void) {
 
 	/* select for events */
 	wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
-			|EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
+			|EnterWindowMask|LeaveWindowMask|StructureNotifyMask
+			|PropertyChangeMask;
 	XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
 	XSelectInput(dpy, root, wa.event_mask);
 
-
-	/* grab keys */
 	grabkeys();
 }
 
 void
+showhide(Client *c, unsigned int ntiled) {
+	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);
+		showhide(c->snext, ntiled);
+	}
+	else { /* hide clients bottom up */
+		showhide(c->snext, ntiled);
+		XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
+	}
+}
+
+
+void
+sigchld(int signal) {
+	while(0 < waitpid(-1, NULL, WNOHANG));
+}
+
+void
 spawn(const Arg *arg) {
-	/* The double-fork construct avoids zombie processes and keeps the code
-	 * clean from stupid signal handlers. */
+	signal(SIGCHLD, sigchld);
 	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");
-		}
+		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
@@ -1428,7 +1407,7 @@ tile(void) {
 	/* master */
 	c = nexttiled(clients);
 	mw = mfact * ww;
-	resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
+	resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw);
 
 	if(--n == 0)
 		return;
@@ -1443,9 +1422,9 @@ tile(void) {
 
 	for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
 		resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
-		       ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
+		       ? wy + wh - y - 2 * c->bw : h - 2 * c->bw));
 		if(h != wh)
-			y = c->y + c->h + 2 * c->bw;
+			y = c->y + HEIGHT(c);
 	}
 }
 
@@ -1463,15 +1442,19 @@ togglefloating(const Arg *arg) {
 		return;
 	sel->isfloating = !sel->isfloating || sel->isfixed;
 	if(sel->isfloating)
-		resize(sel, sel->x, sel->y, sel->w, sel->h, True);
+		resize(sel, sel->x, sel->y, sel->w, sel->h);
 	arrange();
 }
 
 void
 toggletag(const Arg *arg) {
-	unsigned int mask = sel->tags ^ (arg->ui & TAGMASK);
+	unsigned int mask;
 
-	if(sel && mask) {
+	if (!sel)
+		return;
+	
+	mask = sel->tags ^ (arg->ui & TAGMASK);
+	if(mask) {
 		sel->tags = mask;
 		arrange();
 	}
@@ -1483,7 +1466,6 @@ toggleview(const Arg *arg) {
 
 	if(mask) {
 		tagset[seltags] = mask;
-		clearurgent();
 		arrange();
 	}
 }
@@ -1564,11 +1546,27 @@ updategeom(void) {
 }
 
 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;
 
-	XGetWMNormalHints(dpy, c->win, &size, &msize);
+	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;
@@ -1608,13 +1606,20 @@ updatesizehints(Client *c) {
 	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);
+	             && c->maxw == c->minw && c->maxh == c->minh);
 }
 
 void
 updatetitle(Client *c) {
 	if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
-		gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
+		gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
+}
+
+void
+updatestatus() {
+	if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
+		strcpy(stext, "dwm-"VERSION);
+	drawbar();
 }
 
 void
@@ -1622,7 +1627,7 @@ updatewmhints(Client *c) {
 	XWMHints *wmh;
 
 	if((wmh = XGetWMHints(dpy, c->win))) {
-		if(ISVISIBLE(c) && wmh->flags & XUrgencyHint) {
+		if(c == sel && wmh->flags & XUrgencyHint) {
 			wmh->flags &= ~XUrgencyHint;
 			XSetWMHints(dpy, c->win, wmh);
 		}
@@ -1640,7 +1645,6 @@ view(const Arg *arg) {
 	seltags ^= 1; /* toggle sel tagset */
 	if(arg->ui & TAGMASK)
 		tagset[seltags] = arg->ui & TAGMASK;
-	clearurgent();
 	arrange();
 }
 
@@ -1695,14 +1699,14 @@ zoom(const Arg *arg) {
 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");
+		die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
 	else if(argc != 1)
 		die("usage: dwm [-v]\n");
 
-	if(!XSupportsLocale())
-		fprintf(stderr, "warning: no locale support\n");
+	if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
+		fputs("warning: no locale support\n", stderr);
 
-	if(!(dpy = XOpenDisplay(0)))
+	if(!(dpy = XOpenDisplay(NULL)))
 		die("dwm: cannot open display\n");
 
 	checkotherwm();