allow a format function as argument

Author: mutlusun

init.lua

@@ -261,12 +261,16 @@ end
 -- }}}
 
 -- {{{ Get custom widget format data
-function vicious.getdata(myw, format, warg)
-    return helpers.format(format, myw(format, warg))
+function vicious.call(myw, format, warg)
+    local mydata = myw(format, warg)
+    if type(format) == "string" then
+        return helpers.format(format, mydata)
+    elseif type(format) == "function" then
+        return format(myw, mydata)
+    end
 end
 -- }}}
 
-
 return vicious
 
 -- }}}