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Editing: categories.php
<?php /** * Server-side rendering of the `core/categories` block. * * @package WordPress */ /** * Renders the `core/categories` block on server. * * @since 5.0.0 * @since 6.7.0 Enable client-side rendering if enhancedPagination context is true. * * @param array $attributes The block attributes. * @param string $content Block default content. * @param WP_Block $block Block instance. * * @return string Returns the categories list/dropdown markup. */ function render_block_core_categories( $attributes, $content, $block ) { static $block_id = 0; ++$block_id; $taxonomy = get_taxonomy( $attributes['taxonomy'] ); $args = array( 'echo' => false, 'hierarchical' => ! empty( $attributes['showHierarchy'] ), 'orderby' => 'name', 'show_count' => ! empty( $attributes['showPostCounts'] ), 'taxonomy' => $attributes['taxonomy'], 'title_li' => '', 'hide_empty' => empty( $attributes['showEmpty'] ), ); if ( ! empty( $attributes['showOnlyTopLevel'] ) && $attributes['showOnlyTopLevel'] ) { $args['parent'] = 0; } if ( ! empty( $attributes['displayAsDropdown'] ) ) { $id = 'wp-block-categories-' . $block_id; $args['id'] = $id; $args['name'] = $taxonomy->query_var; $args['value_field'] = 'slug'; $args['show_option_none'] = sprintf( /* translators: %s: taxonomy's singular name */ __( 'Select %s' ), $taxonomy->labels->singular_name ); // Pre-select the current term using query var. $args['selected'] = get_query_var( $taxonomy->query_var ); $show_label = empty( $attributes['showLabel'] ) ? ' screen-reader-text' : ''; $default_label = $taxonomy->label; $label_text = ! empty( $attributes['label'] ) ? wp_kses_post( $attributes['label'] ) : $default_label; $wrapper_markup = '<div %1$s><label class="wp-block-categories__label' . $show_label . '" for="' . esc_attr( $id ) . '">' . $label_text . '</label>%2$s</div>'; $items_markup = wp_dropdown_categories( $args ); $type = 'dropdown'; if ( ! is_admin() ) { // Inject the dropdown script immediately after the select dropdown. $items_markup = preg_replace( '#(?<=</select>)#', build_dropdown_script_block_core_categories( $id ), $items_markup, 1 ); } } else { $args['show_option_none'] = $taxonomy->labels->no_terms; $wrapper_markup = '<ul %1$s>%2$s</ul>'; $items_markup = wp_list_categories( $args ); $type = 'list'; if ( ! empty( $block->context['enhancedPagination'] ) ) { $p = new WP_HTML_Tag_Processor( $items_markup ); while ( $p->next_tag( 'a' ) ) { $p->set_attribute( 'data-wp-on--click', 'core/query::actions.navigate' ); } $items_markup = $p->get_updated_html(); } } $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => "wp-block-categories-{$type} wp-block-categories-taxonomy-{$attributes['taxonomy']}" ) ); return sprintf( $wrapper_markup, $wrapper_attributes, $items_markup ); } /** * Generates the inline script for a categories dropdown field. * * @since 5.0.0 * * @param string $dropdown_id ID of the dropdown field. * * @return string Returns the dropdown onChange redirection script. */ function build_dropdown_script_block_core_categories( $dropdown_id ) { ob_start(); $exports = array( $dropdown_id, home_url() ); ?> <script> ( ( [ dropdownId, homeUrl ] ) => { const dropdown = document.getElementById( dropdownId ); function onSelectChange() { setTimeout( () => { if ( 'escape' === dropdown.dataset.lastkey ) { return; } // Only navigate if a valid term is selected (not the default "Select [taxonomy]" option) if ( dropdown.value && dropdown.value !== '-1' && dropdown instanceof HTMLSelectElement ) { const url = new URL( homeUrl ); url.searchParams.set( dropdown.name, dropdown.value ); location.href = url.href; } }, 250 ); } function onKeyUp( event ) { if ( 'Escape' === event.key ) { dropdown.dataset.lastkey = 'escape'; } else { delete dropdown.dataset.lastkey; } } function onClick() { delete dropdown.dataset.lastkey; } dropdown.addEventListener( 'keyup', onKeyUp ); dropdown.addEventListener( 'click', onClick ); dropdown.addEventListener( 'change', onSelectChange ); } )( <?php echo wp_json_encode( $exports, JSON_HEX_TAG | JSON_UNESCAPED_SLASHES ); ?> ); </script> <?php return wp_get_inline_script_tag( trim( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) ) . "\n//# sourceURL=" . rawurlencode( __FUNCTION__ ) ); } /** * Registers the `core/categories` block on server. * * @since 5.0.0 */ function register_block_core_categories() { register_block_type_from_metadata( __DIR__ . '/categories', array( 'render_callback' => 'render_block_core_categories', ) ); } add_action( 'init', 'register_block_core_categories' );
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