Add support for XUrgency and matching _NET_WM_STATE_DEMANDS_ATTENTION

ewmh hint; urgencyborder is configurable.  The urgency flag will stick,
even while on a client in a non-viewable group, until the client
receives focus (where the border is reset).  Initial diff from Thomas
Adam with some changes/enhancements from me.

calmwm.h

@@ -97,6 +97,7 @@ enum cursor_font {
 enum color {
 	CWM_COLOR_BORDER_ACTIVE,
 	CWM_COLOR_BORDER_INACTIVE,
+	CWM_COLOR_BORDER_URGENCY,
 	CWM_COLOR_BORDER_GROUP,
 	CWM_COLOR_BORDER_UNGROUP,
 	CWM_COLOR_MENU_FG,
@@ -162,6 +163,7 @@ struct client_ctx {
 #define CLIENT_INPUT			0x0080
 #define CLIENT_WM_DELETE_WINDOW		0x0100
 #define CLIENT_WM_TAKE_FOCUS		0x0200
+#define CLIENT_URGENCY			0x0400
 
 #define CLIENT_HIGHLIGHT		(CLIENT_GROUP | CLIENT_UNGROUP)
 #define CLIENT_MAXFLAGS			(CLIENT_VMAXIMIZED | CLIENT_HMAXIMIZED)
@@ -350,9 +352,10 @@ enum {
 	_NET_WM_DESKTOP,
 	_NET_CLOSE_WINDOW,
 	_NET_WM_STATE,
-#define	_NET_WM_STATES_NITEMS	2
+#define	_NET_WM_STATES_NITEMS	3
 	_NET_WM_STATE_MAXIMIZED_VERT,
 	_NET_WM_STATE_MAXIMIZED_HORZ,
+	_NET_WM_STATE_DEMANDS_ATTENTION,
 	EWMH_NITEMS
 };
 enum {
@@ -396,6 +399,7 @@ void			 client_setname(struct client_ctx *);
 int			 client_snapcalc(int, int, int, int, int);
 void			 client_transient(struct client_ctx *);
 void			 client_unhide(struct client_ctx *);
+void			 client_urgency(struct client_ctx *);
 void			 client_vmaximize(struct client_ctx *);
 void 			 client_vtile(struct client_ctx *);
 void			 client_warp(struct client_ctx *);

conf.c

@@ -88,6 +88,7 @@ conf_ignore(struct conf *c, char *val)
 static char *color_binds[] = {
 	"#CCCCCC",	/* CWM_COLOR_BORDER_ACTIVE */
 	"#666666",	/* CWM_COLOR_BORDER_INACTIVE */
+	"#FC8814",	/* CWM_COLOR_BORDER_URGENCY */
 	"blue",		/* CWM_COLOR_BORDER_GROUP */
 	"red",		/* CWM_COLOR_BORDER_UNGROUP */
 	"black",	/* CWM_COLOR_MENU_FG */
@@ -687,6 +688,7 @@ static char *ewmhints[] = {
 	"_NET_WM_STATE",
 	"_NET_WM_STATE_MAXIMIZED_VERT",
 	"_NET_WM_STATE_MAXIMIZED_HORZ",
+	"_NET_WM_STATE_DEMANDS_ATTENTION",
 };
 
 void

cwmrc.5

@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: July 8 2013 $
+.Dd $Mdocdate: November 27 2013 $
 .Dt CWMRC 5
 .Os
 .Sh NAME
@@ -125,6 +125,9 @@ Set menu background color.
 .It Ic color menufg Ar color
 Set menu foreground color.
 .Pp
+.It Ic color urgencyborder Ar color
+Set the color of the border of a window indicating urgency.
+.Pp
 .It Ic color ungroupborder Ar color
 Set the color of the border while ungrouping a window.
 .Pp

parse.y

@@ -70,7 +70,7 @@ typedef struct {
 %token	AUTOGROUP BIND COMMAND IGNORE
 %token	YES NO BORDERWIDTH MOVEAMOUNT
 %token	COLOR SNAPDIST
-%token	ACTIVEBORDER INACTIVEBORDER
+%token	ACTIVEBORDER INACTIVEBORDER URGENCYBORDER
 %token	GROUPBORDER UNGROUPBORDER
 %token	MENUBG MENUFG
 %token	FONTCOLOR FONTSELCOLOR
@@ -193,6 +193,10 @@ colors		: ACTIVEBORDER STRING {
 			free(conf->color[CWM_COLOR_BORDER_INACTIVE]);
 			conf->color[CWM_COLOR_BORDER_INACTIVE] = $2;
 		}
+		| URGENCYBORDER STRING {
+			free(conf->color[CWM_COLOR_BORDER_URGENCY]);
+			conf->color[CWM_COLOR_BORDER_URGENCY] = $2;
+		}
 		| GROUPBORDER STRING {
 			free(conf->color[CWM_COLOR_BORDER_GROUP]);
 			conf->color[CWM_COLOR_BORDER_GROUP] = $2;
@@ -271,6 +275,7 @@ lookup(char *s)
 		{ "snapdist",		SNAPDIST},
 		{ "sticky",		STICKY},
 		{ "ungroupborder",	UNGROUPBORDER},
+		{ "urgencyborder",	URGENCYBORDER},
 		{ "yes",		YES}
 	};
 	const struct keywords	*p;

xutil.c

@@ -333,6 +333,9 @@ xu_ewmh_handle_net_wm_state_msg(struct client_ctx *cc, int action,
 		{ _NET_WM_STATE_MAXIMIZED_HORZ,
 			CLIENT_HMAXIMIZED,
 			client_hmaximize },
+		{ _NET_WM_STATE_DEMANDS_ATTENTION,
+			CLIENT_URGENCY,
+			client_urgency },
 	};
 
 	for (i = 0; i < nitems(handlers); i++) {
@@ -366,6 +369,8 @@ xu_ewmh_restore_net_wm_state(struct client_ctx *cc)
 			client_hmaximize(cc);
 		if (atoms[i] == ewmh[_NET_WM_STATE_MAXIMIZED_VERT])
 			client_vmaximize(cc);
+		if (atoms[i] == ewmh[_NET_WM_STATE_DEMANDS_ATTENTION])
+			client_urgency(cc);
 	}
 	free(atoms);
 }
@@ -380,7 +385,8 @@ xu_ewmh_set_net_wm_state(struct client_ctx *cc)
 	atoms = xcalloc((n + _NET_WM_STATES_NITEMS), sizeof(Atom));
 	for (i = j = 0; i < n; i++) {
 		if (oatoms[i] != ewmh[_NET_WM_STATE_MAXIMIZED_HORZ] &&
-		    oatoms[i] != ewmh[_NET_WM_STATE_MAXIMIZED_VERT])
+		    oatoms[i] != ewmh[_NET_WM_STATE_MAXIMIZED_VERT] &&
+		    oatoms[i] != ewmh[_NET_WM_STATE_DEMANDS_ATTENTION])
 			atoms[j++] = oatoms[i];
 	}
 	free(oatoms);
@@ -388,6 +394,8 @@ xu_ewmh_set_net_wm_state(struct client_ctx *cc)
 		atoms[j++] = ewmh[_NET_WM_STATE_MAXIMIZED_HORZ];
 	if (cc->flags & CLIENT_VMAXIMIZED)
 		atoms[j++] = ewmh[_NET_WM_STATE_MAXIMIZED_VERT];
+	if (cc->flags & CLIENT_URGENCY)
+		atoms[j++] = ewmh[_NET_WM_STATE_DEMANDS_ATTENTION];
 	if (j > 0)
 		XChangeProperty(X_Dpy, cc->win, ewmh[_NET_WM_STATE],
 		    XA_ATOM, 32, PropModeReplace, (unsigned char *)atoms, j);