focus urgent tabs

With a lot of open tabs its quite annoying to toggle through all tabs
until reaching the next one with an urgent hint set. Also with using
Ctrl-[0..9] to get to the first 10 tabs, in some cases this may have
disadvantages:
1. with more than 10 tabs, you can not use that quickselection
2. with a small tabbed window, you do not see every tab in the
   statusbar and therefore do not know which tab got urgent

Therefore I created a function, which iterates over all currently
managed tabs, focus the first urgent tab found or stays at the current
tab, if there is no urgent-tab. By default, that function is mapped to
Ctrl-u.

Signed-off-by: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
Signed-off-by: Christoph Lohmann <20h@r-36.net>

config.def.h

@@ -55,6 +55,8 @@ static Key keys[] = { \
 
 	{ MODKEY,                       XK_q,      killclient,     { 0 } },
 
+	{ MODKEY,                       XK_u,      focusurgent,    { .v = NULL } },
+
 	{ 0,                            XK_F11,    fullscreen,     { 0 } },
 };
 

tabbed.1

@@ -134,6 +134,9 @@ an already existing tab.
 .B Ctrl\-q
 close tab
 .TP
+.B Ctrl\-u
+focus next urgent tab
+.TP
 .B Ctrl\-[0..9]
 jumps to nth tab
 .TP

tabbed.c

@@ -104,6 +104,7 @@ static void expose(const XEvent *e);
 static void focus(int c);
 static void focusin(const XEvent *e);
 static void focusonce(const Arg *arg);
+static void focusurgent(const Arg *);
 static void fullscreen(const Arg *arg);
 static char* getatom(int a);
 static int getclient(Window w);
@@ -491,6 +492,17 @@ focusonce(const Arg *arg) {
 	nextfocus = True;
 }
 
+void
+focusurgent(const Arg *args) {
+	int c;
+	for(c = (sel+1)%nclients; c != sel; c = (c+1)%nclients) {
+		if(clients[c]->urgent) {
+			focus(c);
+			return;
+		}
+	}
+}
+
 void
 fullscreen(const Arg *arg) {
 	XEvent e;