add support for Urgency hint

client.c

@@ -507,6 +507,18 @@ client_unmanage(Client *c, long state)
     p_delete(&c);
 }
 
+void
+client_updatewmhints(Client *c)
+{
+    XWMHints *wmh;
+
+    if((wmh = XGetWMHints(globalconf.display, c->win)))
+    {
+        c->isurgent = (wmh->flags & XUrgencyHint);
+        XFree(wmh);
+    }
+}
+
 void
 client_updatesizehints(Client *c)
 {

client.h

@@ -34,6 +34,7 @@ void client_manage(Window, XWindowAttributes *, int);
 void client_resize(Client *, int, int, int, int, Bool, Bool);
 void client_unban(Client *);
 void client_unmanage(Client *, long);
+void client_updatewmhints(Client *);
 void client_updatesizehints(Client *);
 void client_updatetitle(Client *);
 void client_saveprops(Client *, int); 

config.c

@@ -327,6 +327,8 @@ config_parse(const char *confpatharg)
         CFG_STR((char *) "focus_border", (char *) "#6666ff", CFGF_NONE),
         CFG_STR((char *) "focus_bg", (char *) "#6666ff", CFGF_NONE),
         CFG_STR((char *) "focus_fg", (char *) "#ffffff", CFGF_NONE),
+        CFG_STR((char *) "urgent_bg", (char *) "#ff0000", CFGF_NONE),
+        CFG_STR((char *) "urgent_fg", (char *) "#ffffff", CFGF_NONE),
         CFG_STR((char *) "tab_border", (char *) "#ff0000", CFGF_NONE),
         CFG_END()
     };
@@ -562,6 +564,10 @@ config_parse(const char *confpatharg)
                                                         cfg_getstr(cfg_colors, "focus_bg"));
         virtscreen->colors_selected[ColFG] = initxcolor(screen,
                                                         cfg_getstr(cfg_colors, "focus_fg"));
+        virtscreen->colors_urgent[ColBG] = initxcolor(screen,
+                                                      cfg_getstr(cfg_colors, "urgent_bg"));
+        virtscreen->colors_urgent[ColFG] = initxcolor(screen,
+                                                      cfg_getstr(cfg_colors, "urgent_fg"));
 
         /* Statusbar */
         virtscreen->statusbar = p_new(Statusbar, 1);

config.h

@@ -31,8 +31,9 @@
 enum
 { BarTop, BarBot, BarLeft, BarRight, BarOff };
 
+/** Common colors */
 enum
-{ ColBorder, ColFG, ColBG, ColLast };   /* color */
+{ ColBorder, ColFG, ColBG, ColLast };
 
 enum
 { CurNormal, CurResize, CurMove, CurLast };     /* cursor */
@@ -114,6 +115,8 @@ struct Client
     int minax, maxax, minay, maxay;
     long flags;
     int border, oldborder;
+    /** Has urgency hint */
+    Bool isurgent;
     /** Store previous floating state before maximizing */
     Bool wasfloating;
     /** True if the window is floating */
@@ -205,6 +208,8 @@ typedef struct
     XColor colors_normal[ColLast];
     /** Selected colors */
     XColor colors_selected[ColLast];
+    /** Urgency colors */
+    XColor colors_urgent[ColLast];
     /** Tag list */
     Tag *tags;
     TagClientLink *tclink;

event.c

@@ -357,6 +357,10 @@ handle_event_propertynotify(XEvent * e)
           case XA_WM_NORMAL_HINTS:
             client_updatesizehints(c);
             break;
+          case XA_WM_HINTS:
+            client_updatewmhints(c);
+            statusbar_draw(c->screen);
+            break;
         }
         if(ev->atom == XA_WM_NAME || ev->atom == XInternAtom(c->display, "_NET_WM_NAME", False))
         {

tag.c

@@ -84,6 +84,9 @@ is_client_tagged(Client *c, Tag *t, int screen)
 {
     TagClientLink *tc;
 
+    if(!c || c->screen != screen)
+        return False;
+
     for(tc = globalconf.screens[screen].tclink; tc; tc = tc->next)
         if(tc->client == c && tc->tag == t)
             return True;

widgets/taglist.c

@@ -39,11 +39,23 @@ isoccupied(int screen, Tag *t)
     Client *c;
 
     for(c = globalconf.clients; c; c = c->next)
-        if(c->screen == screen && is_client_tagged(c, t, screen))
+        if(is_client_tagged(c, t, screen))
             return True;
     return False;
 }
 
+static Bool
+isurgent(int screen, Tag *t)
+{
+    Client *c;
+
+    for(c = globalconf.clients; c; c = c->next)
+        if(is_client_tagged(c, t, screen) && c->isurgent)
+            return True;
+
+    return False;
+}
+
 static int
 taglist_draw(Widget *widget,
              DrawCtx *ctx,
@@ -73,6 +85,8 @@ taglist_draw(Widget *widget,
         w = textwidth(ctx, vscreen.font, tag->name);
         if(tag->selected)
             colors = vscreen.colors_selected;
+        else if(isurgent(widget->statusbar->screen, tag))
+            colors = vscreen.colors_urgent;
         else
             colors = vscreen.colors_normal;
         draw_text(ctx, location + width, 0, w,