[client] Add a hook on urgent flag

Signed-off-by: Julien Danjou <julien@danjou.info>

client.c

@@ -666,11 +666,13 @@ client_updatewmhints(client_t *c)
     if((wmh = xcb_get_wm_hints(globalconf.connection, c->win)))
     {
         const uint32_t wm_hints_flags = xcb_wm_hints_get_flags(wmh);
-        if((c->isurgent = ((wm_hints_flags & XCB_WM_X_URGENCY_HINT) &&
+        if((c->isurgent = (wm_hints_flags & XCB_WM_X_URGENCY_HINT)))
-                           globalconf.focus->client != c)))
         {
             widget_invalidate_cache(c->screen, WIDGET_CACHE_CLIENTS);
             titlebar_draw(c);
+            /* execute hook */
+            luaA_client_userdata_new(c);
+            luaA_dofunction(globalconf.L, globalconf.hooks.urgent, 1);
         }
         if((wm_hints_flags & XCB_WM_STATE_HINT) &&
            (xcb_wm_hints_get_initial_state(wmh) == XCB_WM_WITHDRAWN_STATE))

lua.c

@@ -360,6 +360,20 @@ luaA_hooks_titleupdate(lua_State *L)
     return 0;
 }
 
+/** Set the function called when a client get urgency flag. This function is called with
+ * the client object as argument.
+ * \param A function to call when a client get the urgent flag.
+ */
+static int
+luaA_hooks_urgent(lua_State *L)
+{
+    luaA_checkfunction(L, 1);
+    if(globalconf.hooks.urgent)
+        luaL_unref(L, LUA_REGISTRYINDEX, globalconf.hooks.urgent);
+    globalconf.hooks.urgent = luaL_ref(L, LUA_REGISTRYINDEX);
+    return 0;
+}
+
 /** Set default font.
  * \param A string with a font name in Pango format.
  */
@@ -439,6 +453,7 @@ luaA_parserc(const char *rcfile)
         { "mouseover", luaA_hooks_mouseover },
         { "arrange", luaA_hooks_arrange },
         { "titleupdate", luaA_hooks_titleupdate },
+        { "urgent", luaA_hooks_urgent },
         { NULL, NULL }
     };
 

structs.h

@@ -429,6 +429,8 @@ struct awesome_t
         luaA_function arrange;
         /** Command to run on title change */
         luaA_function titleupdate;
+        /** Command to run on urgent flag */
+        luaA_function urgent;
     } hooks;
 };