[wp-trac] [WordPress Trac] #31525: Request for filter hook for has_nav_menu()

[WordPress Trac]

#31525: Request for filter hook for has_nav_menu()
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 Reporter:  dougwollison  |      Owner:
     Type:  enhancement   |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Menus         |    Version:  trunk
 Severity:  normal        |   Keywords:
  Focuses:                |
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 I have a plugin that creates dummy copies of nav menu locations for the
 purpose of having separate menus assigned to the same location but in
 different languages.

 The current hook adds callbacks to the `after_setup_theme` and
 `wp_nav_menu_args` filter hooks to achieve this, replacing the original
 location setup/requested with copies for each language registered by the
 plugin.

 This largely works perfectly well on all my sites, but I've been informed
 of issues with it working in many stock themes. The issue has to do with
 the theme calling `has_nav_menu()` to check if a menu is registered to a
 particular location. However, since no actual menu is assigned to that
 location, but rather the pseudo version for a particular language, it
 returns false.

 My proposal is to add a filter to `has_nav_menu()` so that plugins can
 filter the result. Something like this:

 {{{
 function has_nav_menu( $location ) {
     $registered_nav_menus = get_registered_nav_menus();

     $result = isset( $registered_nav_menus[ $location ] );
     if ( ! $result ) {
         $locations = get_nav_menu_locations();
         $result = ! empty( $locations[ $location ] );
     }

     return apply_filters( 'has_nav_menu', $result, $location );
 }
 }}}

 Either that or a filter on `get_registered_nav_menus()` or
 `get_nav_menu_locations()`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/31525>
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