';
return $html;
}
/**
* Returns a navigation link variation
*
* @param WP_Taxonomy|WP_Post_Type $entity post type or taxonomy entity.
* @param string $kind string of value 'taxonomy' or 'post-type'.
*
* @return array
*/
function build_variation_for_navigation_link( $entity, $kind ) {
$title = '';
$description = '';
if ( property_exists( $entity->labels, 'item_link' ) ) {
$title = $entity->labels->item_link;
}
if ( property_exists( $entity->labels, 'item_link_description' ) ) {
$description = $entity->labels->item_link_description;
}
$variation = array(
'name' => $entity->name,
'title' => $title,
'description' => $description,
'attributes' => array(
'type' => $entity->name,
'kind' => $kind,
),
);
// Tweak some value for the variations.
$variation_overrides = array(
'post_tag' => array(
'name' => 'tag',
'attributes' => array(
'type' => 'tag',
'kind' => $kind,
),
),
'post_format' => array(
// The item_link and item_link_description for post formats is the
// same as for tags, so need to be overridden.
'title' => __( 'Post Format Link' ),
'description' => __( 'A link to a post format' ),
'attributes' => array(
'type' => 'post_format',
'kind' => $kind,
),
),
);
if ( array_key_exists( $entity->name, $variation_overrides ) ) {
$variation = array_merge(
$variation,
$variation_overrides[ $entity->name ]
);
}
return $variation;
}
/**
* Filters the registered variations for a block type.
* Returns the dynamically built variations for all post-types and taxonomies.
*
* @since 6.5.0
*
* @param array $variations Array of registered variations for a block type.
* @param WP_Block_Type $block_type The full block type object.
*/
function block_core_navigation_link_filter_variations( $variations, $block_type ) {
if ( 'core/navigation-link' !== $block_type->name ) {
return $variations;
}
$generated_variations = block_core_navigation_link_build_variations();
return array_merge( $variations, $generated_variations );
}
/**
* Returns an array of variations for the navigation link block.
*
* @since 6.5.0
*
* @return array
*/
function block_core_navigation_link_build_variations() {
$post_types = get_post_types( array( 'show_in_nav_menus' => true ), 'objects' );
$taxonomies = get_taxonomies( array( 'show_in_nav_menus' => true ), 'objects' );
/*
* Use two separate arrays as a way to order the variations in the UI.
* Known variations (like Post Link and Page Link) are added to the
* `built_ins` array. Variations for custom post types and taxonomies are
* added to the `variations` array and will always appear after `built-ins.
*/
$built_ins = array();
$variations = array();
if ( $post_types ) {
foreach ( $post_types as $post_type ) {
$variation = build_variation_for_navigation_link( $post_type, 'post-type' );
if ( $post_type->_builtin ) {
$built_ins[] = $variation;
} else {
$variations[] = $variation;
}
}
}
if ( $taxonomies ) {
foreach ( $taxonomies as $taxonomy ) {
$variation = build_variation_for_navigation_link( $taxonomy, 'taxonomy' );
if ( $taxonomy->_builtin ) {
$built_ins[] = $variation;
} else {
$variations[] = $variation;
}
}
}
return array_merge( $built_ins, $variations );
}
/**
* Registers the navigation link block.
*
* @uses render_block_core_navigation_link()
* @throws WP_Error An WP_Error exception parsing the block definition.
*/
function register_block_core_navigation_link() {
register_block_type_from_metadata(
__DIR__ . '/navigation-link',
array(
'render_callback' => 'render_block_core_navigation_link',
)
);
}
add_action( 'init', 'register_block_core_navigation_link' );
/**
* Creates all variations for post types / taxonomies dynamically (= each time when variations are requested).
* Do not use variation_callback, to also account for unregistering post types/taxonomies later on.
*/
add_action( 'get_block_type_variations', 'block_core_navigation_link_filter_variations', 10, 2 );