nice menus + context

Active menu trails set by the context module aren't respected by the nice menus module. 

I found this patch: http://drupal.org/files/issues/835090-4-context_reaction_menu_trail.patch which told me the right thing to do: write a ctools plugin for context that would expose a reaction for nice menus.

However, I didn't do the right thing. It probably took me the same amount of time, but I went and found
- the theme function that nice menus uses to style its list items: {themename}_nice_menus_build
- the function in the context module that gives you the active contexts: context_active_contexts()

I get my active contexts inside the theme function, and set any menu reactions into $context_active_trail.  Later in that function, I compare them with the menu being built:

<code>
 if ($context_active_trail) {
        if(in_array($menu_item['link']['link_path'], $context_active_trail)){
          $trail[] = $menu_item['link']['mlid'];
        }
      }
</code>

The trail variable is used next to test the current menu item and set the active-trail class if it matches. 

Now Nice menus respects Context's active menu assignments.  It would be nice if I went back and figured out the process to do it the right way, where the theme isn't so tightly coupled to the context module.

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