| 
<?php
 /**
 * Sets a custom slug when creating auto-draft template parts.
 *
 * This is only needed for auto-drafts created by the regular WP editor.
 * If this page is to be removed, this will not be necessary.
 *
 * @since 5.9.0
 *
 * @param int $post_id Post ID.
 */
 function wp_set_unique_slug_on_create_template_part( $post_id ) {
 $post = get_post( $post_id );
 if ( 'auto-draft' !== $post->post_status ) {
 return;
 }
 
 if ( ! $post->post_name ) {
 wp_update_post(
 array(
 'ID'        => $post_id,
 'post_name' => 'custom_slug_' . uniqid(),
 )
 );
 }
 
 $terms = get_the_terms( $post_id, 'wp_theme' );
 if ( ! is_array( $terms ) || ! count( $terms ) ) {
 wp_set_post_terms( $post_id, get_stylesheet(), 'wp_theme' );
 }
 }
 
 /**
 * Generates a unique slug for templates.
 *
 * @access private
 * @since 5.8.0
 *
 * @param string $override_slug The filtered value of the slug (starts as `null` from apply_filter).
 * @param string $slug          The original/un-filtered slug (post_name).
 * @param int    $post_id       Post ID.
 * @param string $post_status   No uniqueness checks are made if the post is still draft or pending.
 * @param string $post_type     Post type.
 * @return string The original, desired slug.
 */
 function wp_filter_wp_template_unique_post_slug( $override_slug, $slug, $post_id, $post_status, $post_type ) {
 if ( 'wp_template' !== $post_type && 'wp_template_part' !== $post_type ) {
 return $override_slug;
 }
 
 if ( ! $override_slug ) {
 $override_slug = $slug;
 }
 
 /*
 * Template slugs must be unique within the same theme.
 * TODO - Figure out how to update this to work for a multi-theme environment.
 * Unfortunately using `get_the_terms()` for the 'wp-theme' term does not work
 * in the case of new entities since is too early in the process to have been saved
 * to the entity. So for now we use the currently activated theme for creation.
 */
 $theme = get_stylesheet();
 $terms = get_the_terms( $post_id, 'wp_theme' );
 if ( $terms && ! is_wp_error( $terms ) ) {
 $theme = $terms[0]->name;
 }
 
 $check_query_args = array(
 'post_name__in'  => array( $override_slug ),
 'post_type'      => $post_type,
 'posts_per_page' => 1,
 'no_found_rows'  => true,
 'post__not_in'   => array( $post_id ),
 'tax_query'      => array(
 array(
 'taxonomy' => 'wp_theme',
 'field'    => 'name',
 'terms'    => $theme,
 ),
 ),
 );
 $check_query      = new WP_Query( $check_query_args );
 $posts            = $check_query->posts;
 
 if ( count( $posts ) > 0 ) {
 $suffix = 2;
 do {
 $query_args                  = $check_query_args;
 $alt_post_name               = _truncate_post_slug( $override_slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
 $query_args['post_name__in'] = array( $alt_post_name );
 $query                       = new WP_Query( $query_args );
 ++$suffix;
 } while ( count( $query->posts ) > 0 );
 $override_slug = $alt_post_name;
 }
 
 return $override_slug;
 }
 
 /**
 * Enqueues the skip-link script & styles.
 *
 * @access private
 * @since 6.4.0
 *
 * @global string $_wp_current_template_content
 */
 function wp_enqueue_block_template_skip_link() {
 global $_wp_current_template_content;
 
 // Back-compat for plugins that disable functionality by unhooking this action.
 if ( ! has_action( 'wp_footer', 'the_block_template_skip_link' ) ) {
 return;
 }
 remove_action( 'wp_footer', 'the_block_template_skip_link' );
 
 // Early exit if not a block theme.
 if ( ! current_theme_supports( 'block-templates' ) ) {
 return;
 }
 
 // Early exit if not a block template.
 if ( ! $_wp_current_template_content ) {
 return;
 }
 
 $skip_link_styles = '
 .skip-link.screen-reader-text {
 border: 0;
 clip: rect(1px,1px,1px,1px);
 clip-path: inset(50%);
 height: 1px;
 margin: -1px;
 overflow: hidden;
 padding: 0;
 position: absolute !important;
 width: 1px;
 word-wrap: normal !important;
 }
 
 .skip-link.screen-reader-text:focus {
 background-color: #eee;
 clip: auto !important;
 clip-path: none;
 color: #444;
 display: block;
 font-size: 1em;
 height: auto;
 left: 5px;
 line-height: normal;
 padding: 15px 23px 14px;
 text-decoration: none;
 top: 5px;
 width: auto;
 z-index: 100000;
 }';
 
 $handle = 'wp-block-template-skip-link';
 
 /**
 * Print the skip-link styles.
 */
 wp_register_style( $handle, false );
 wp_add_inline_style( $handle, $skip_link_styles );
 wp_enqueue_style( $handle );
 
 /**
 * Enqueue the skip-link script.
 */
 ob_start();
 ?>
 <script>
 ( function() {
 var skipLinkTarget = document.querySelector( 'main' ),
 sibling,
 skipLinkTargetID,
 skipLink;
 
 // Early exit if a skip-link target can't be located.
 if ( ! skipLinkTarget ) {
 return;
 }
 
 /*
 * Get the site wrapper.
 * The skip-link will be injected in the beginning of it.
 */
 sibling = document.querySelector( '.wp-site-blocks' );
 
 // Early exit if the root element was not found.
 if ( ! sibling ) {
 return;
 }
 
 // Get the skip-link target's ID, and generate one if it doesn't exist.
 skipLinkTargetID = skipLinkTarget.id;
 if ( ! skipLinkTargetID ) {
 skipLinkTargetID = 'wp--skip-link--target';
 skipLinkTarget.id = skipLinkTargetID;
 }
 
 // Create the skip link.
 skipLink = document.createElement( 'a' );
 skipLink.classList.add( 'skip-link', 'screen-reader-text' );
 skipLink.href = '#' + skipLinkTargetID;
 skipLink.innerHTML = '<?php /* translators: Hidden accessibility text. */ esc_html_e( 'Skip to content' ); ?>';
 
 // Inject the skip link.
 sibling.parentElement.insertBefore( skipLink, sibling );
 }() );
 </script>
 <?php
 $skip_link_script = wp_remove_surrounding_empty_script_tags( ob_get_clean() );
 $script_handle    = 'wp-block-template-skip-link';
 wp_register_script( $script_handle, false, array(), false, array( 'in_footer' => true ) );
 wp_add_inline_script( $script_handle, $skip_link_script );
 wp_enqueue_script( $script_handle );
 }
 
 /**
 * Enables the block templates (editor mode) for themes with theme.json by default.
 *
 * @access private
 * @since 5.8.0
 */
 function wp_enable_block_templates() {
 if ( wp_is_block_theme() || wp_theme_has_theme_json() ) {
 add_theme_support( 'block-templates' );
 }
 }
 
 |