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Edit File: template-part.php

<?php /** * Server-side rendering of the `core/template-part` block. * * @package WordPress */ /** * Renders the `core/template-part` block on the server. * * @since 5.9.0 * * @global WP_Embed $wp_embed WordPress Embed object. * * @param array $attributes The block attributes. * * @return string The render. */ function render_block_core_template_part( $attributes ) { static $seen_ids = array(); $template_part_id = null; $content = null; $area = WP_TEMPLATE_PART_AREA_UNCATEGORIZED; $theme = $attributes['theme'] ?? get_stylesheet(); if ( isset( $attributes['slug'] ) && get_stylesheet() === $theme ) { $template_part_id = $theme . '//' . $attributes['slug']; $template_part_query = new WP_Query( array( 'post_type' => 'wp_template_part', 'post_status' => 'publish', 'post_name__in' => array( $attributes['slug'] ), 'tax_query' => array( array( 'taxonomy' => 'wp_theme', 'field' => 'name', 'terms' => $theme, ), ), 'posts_per_page' => 1, 'no_found_rows' => true, 'lazy_load_term_meta' => false, // Do not lazy load term meta, as template parts only have one term. ) ); $template_part_post = $template_part_query->have_posts() ? $template_part_query->next_post() : null; if ( $template_part_post ) { // A published post might already exist if this template part was customized elsewhere // or if it's part of a customized template. $block_template = _build_block_template_result_from_post( $template_part_post ); $content = $block_template->content; if ( isset( $block_template->area ) ) { $area = $block_template->area; } /** * Fires when a block template part is loaded from a template post stored in the database. * * @since 5.9.0 * * @param string $template_part_id The requested template part namespaced to the theme. * @param array $attributes The block attributes. * @param WP_Post $template_part_post The template part post object. * @param string $content The template part content. */ do_action( 'render_block_core_template_part_post', $template_part_id, $attributes, $template_part_post, $content ); } else { $template_part_file_path = ''; // Else, if the template part was provided by the active theme, // render the corresponding file content. if ( 0 === validate_file( $attributes['slug'] ) ) { $block_template = get_block_file_template( $template_part_id, 'wp_template_part' ); if ( isset( $block_template->content ) ) { $content = $block_template->content; } if ( isset( $block_template->area ) ) { $area = $block_template->area; } // Needed for the `render_block_core_template_part_file` and `render_block_core_template_part_none` actions below. $block_template_file = _get_block_template_file( 'wp_template_part', $attributes['slug'] ); if ( $block_template_file ) { $template_part_file_path = $block_template_file['path']; } } if ( '' !== $content && null !== $content ) { /** * Fires when a block template part is loaded from a template part in the theme. * * @since 5.9.0 * * @param string $template_part_id The requested template part namespaced to the theme. * @param array $attributes The block attributes. * @param string $template_part_file_path Absolute path to the template path. * @param string $content The template part content. */ do_action( 'render_block_core_template_part_file', $template_part_id, $attributes, $template_part_file_path, $content ); } else { /** * Fires when a requested block template part does not exist in the database nor in the theme. * * @since 5.9.0 * * @param string $template_part_id The requested template part namespaced to the theme. * @param array $attributes The block attributes. * @param string $template_part_file_path Absolute path to the not found template path. */ do_action( 'render_block_core_template_part_none', $template_part_id, $attributes, $template_part_file_path ); } } } // WP_DEBUG_DISPLAY must only be honored when WP_DEBUG. This precedent // is set in `wp_debug_mode()`. $is_debug = WP_DEBUG && WP_DEBUG_DISPLAY; if ( is_null( $content ) ) { if ( $is_debug && isset( $attributes['slug'] ) ) { return sprintf( /* translators: %s: Template part slug. */ __( 'Template part has been deleted or is unavailable: %s' ), $attributes['slug'] ); } return ''; } if ( isset( $seen_ids[ $template_part_id ] ) ) { return $is_debug ? // translators: Visible only in the front end, this warning takes the place of a faulty block. __( '[block rendering halted]' ) : ''; } // Look up area definition. $area_definition = null; $defined_areas = get_allowed_block_template_part_areas(); foreach ( $defined_areas as $defined_area ) { if ( $defined_area['area'] === $area ) { $area_definition = $defined_area; break; } } // If $area is not allowed, set it back to the uncategorized default. if ( ! $area_definition ) { $area = WP_TEMPLATE_PART_AREA_UNCATEGORIZED; } // Run through the actions that are typically taken on the_content. $content = _wp_apply_block_content_filters( $content, "template_part_{$area}", $seen_ids, $template_part_id ); if ( empty( $attributes['tagName'] ) || tag_escape( $attributes['tagName'] ) !== $attributes['tagName'] ) { $area_tag = 'div'; if ( $area_definition && isset( $area_definition['area_tag'] ) ) { $area_tag = $area_definition['area_tag']; } $html_tag = $area_tag; } else { $html_tag = esc_attr( $attributes['tagName'] ); } $wrapper_attributes = get_block_wrapper_attributes(); return "<$html_tag $wrapper_attributes>" . str_replace( ']]>', ']]&gt;', $content ) . "</$html_tag>"; } /** * Returns an array of area variation objects for the template part block. * * @since 6.1.0 * * @param array $instance_variations The variations for instances. * * @return array Array containing the block variation objects. */ function build_template_part_block_area_variations( $instance_variations ) { $variations = array(); $defined_areas = get_allowed_block_template_part_areas(); foreach ( $defined_areas as $area ) { if ( 'uncategorized' !== $area['area'] && 'navigation-overlay' !== $area['area'] ) { $has_instance_for_area = false; foreach ( $instance_variations as $variation ) { if ( $variation['attributes']['area'] === $area['area'] ) { $has_instance_for_area = true; break; } } $scope = $has_instance_for_area ? array() : array( 'inserter' ); $variations[] = array( 'name' => 'area_' . $area['area'], 'title' => $area['label'], 'description' => $area['description'], 'attributes' => array( 'area' => $area['area'], ), 'scope' => $scope, 'icon' => $area['icon'], ); } } return $variations; } /** * Returns an array of instance variation objects for the template part block * * @since 6.1.0 * * @return array Array containing the block variation objects. */ function build_template_part_block_instance_variations() { // Block themes are unavailable during installation. if ( wp_installing() ) { return array(); } if ( ! current_theme_supports( 'block-templates' ) && ! current_theme_supports( 'block-template-parts' ) ) { return array(); } $variations = array(); $template_parts = get_block_templates( array( 'post_type' => 'wp_template_part', ), 'wp_template_part' ); $defined_areas = get_allowed_block_template_part_areas(); $icon_by_area = array_combine( array_column( $defined_areas, 'area' ), array_column( $defined_areas, 'icon' ) ); foreach ( $template_parts as $template_part ) { // Navigation overlay template parts should not appear in the // general inserter. They are managed through the Navigation // block's overlay template part selector. $scope = ( 'navigation-overlay' === $template_part->area ) ? array() : array( 'inserter' ); $variations[] = array( 'name' => 'instance_' . sanitize_title( $template_part->slug ), 'title' => $template_part->title, // If there's no description for the template part don't show the // block description. This is a bit hacky, but prevent the fallback // by using a non-breaking space so that the value of description // isn't falsey. 'description' => $template_part->description || '&nbsp;', 'attributes' => array( 'slug' => $template_part->slug, 'theme' => $template_part->theme, 'area' => $template_part->area, ), 'scope' => $scope, 'icon' => $icon_by_area[ $template_part->area ] ?? null, 'example' => array( 'attributes' => array( 'slug' => $template_part->slug, 'theme' => $template_part->theme, 'area' => $template_part->area, ), ), ); } return $variations; } /** * Returns an array of all template part block variations. * * @since 5.9.0 * * @return array Array containing the block variation objects. */ function build_template_part_block_variations() { $instance_variations = build_template_part_block_instance_variations(); $area_variations = build_template_part_block_area_variations( $instance_variations ); return array_merge( $area_variations, $instance_variations ); } /** * Registers the `core/template-part` block on the server. * * @since 5.9.0 */ function register_block_core_template_part() { register_block_type_from_metadata( __DIR__ . '/template-part', array( 'render_callback' => 'render_block_core_template_part', 'variation_callback' => 'build_template_part_block_variations', ) ); } add_action( 'init', 'register_block_core_template_part' );
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