add .current-post-ancestor to nav-menu

Dear all, I’m working on a project which has a custom post type “products” and a custom taxonomy “class”, the structure like this :

Home <- index.php
Home/Products/ <- a page with custom page template, use get_terms('class') to list all value in Class
Home/Products/Class <- taxonomy-class.php , list products in this class
Home/Products/Class/Product-Post <- single-products.php , the product detail

And I setup a nag-menu like this :

-Home
-Products
--Crab ( class - custom taxonomy )
--Shrimp ( class - custom taxonomy )
-about
-contact

1. When I’m in Products page, WP will add a .current-menu-item to Products tab.
2. When I’m in Crab page, WP will add a .current-menu-item to Crab and add .current-menu-parent to Products.

Here is what I want :
When I’m in Snow-Crab (belongs to Crab) , I want to add .current-post-parent to Crab , and .current-post-ancestor to Products on nev-menu , so I can style with CSS to highlight it.

Is there any way to do it ?

It can be done like normal category and post relationship , just use post type archive page to Products page in nev-menu , but the problem is I use the way in this topic to make permalink in right structure , which makes my post type archive permalink became products/%class% , can’t be interpreted correctly in nav-menu and even can do it , WP will still not add .current-post-parent to Crab tab (sub-menu to Praducts) in nav-menu.

Anyone has idea ?

Thanks you.