100 lines
2.8 KiB
PHP
100 lines
2.8 KiB
PHP
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<?php
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/**
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* Server-side rendering of the `core/categories` block.
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*
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* @package WordPress
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*/
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/**
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* Renders the `core/categories` block on server.
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*
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* @param array $attributes The block attributes.
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*
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* @return string Returns the categories list/dropdown markup.
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*/
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function render_block_core_categories( $attributes ) {
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static $block_id = 0;
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++$block_id;
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$args = array(
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'echo' => false,
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'hierarchical' => ! empty( $attributes['showHierarchy'] ),
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'orderby' => 'name',
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'show_count' => ! empty( $attributes['showPostCounts'] ),
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'title_li' => '',
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'hide_empty' => empty( $attributes['showEmpty'] ),
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);
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if ( ! empty( $attributes['showOnlyTopLevel'] ) && $attributes['showOnlyTopLevel'] ) {
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$args['parent'] = 0;
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}
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if ( ! empty( $attributes['displayAsDropdown'] ) ) {
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$id = 'wp-block-categories-' . $block_id;
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$args['id'] = $id;
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$args['show_option_none'] = __( 'Select Category' );
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$wrapper_markup = '<div %1$s><label class="screen-reader-text" for="' . esc_attr( $id ) . '">' . __( 'Categories' ) . '</label>%2$s</div>';
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$items_markup = wp_dropdown_categories( $args );
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$type = 'dropdown';
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if ( ! is_admin() ) {
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// Inject the dropdown script immediately after the select dropdown.
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$items_markup = preg_replace(
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'#(?<=</select>)#',
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build_dropdown_script_block_core_categories( $id ),
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$items_markup,
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1
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);
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}
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} else {
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$wrapper_markup = '<ul %1$s>%2$s</ul>';
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$items_markup = wp_list_categories( $args );
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$type = 'list';
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}
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$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => "wp-block-categories-{$type}" ) );
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return sprintf(
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$wrapper_markup,
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$wrapper_attributes,
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$items_markup
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);
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}
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/**
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* Generates the inline script for a categories dropdown field.
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*
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* @param string $dropdown_id ID of the dropdown field.
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*
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* @return string Returns the dropdown onChange redirection script.
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*/
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function build_dropdown_script_block_core_categories( $dropdown_id ) {
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ob_start();
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?>
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<script>
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( function() {
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var dropdown = document.getElementById( '<?php echo esc_js( $dropdown_id ); ?>' );
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function onCatChange() {
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if ( dropdown.options[ dropdown.selectedIndex ].value > 0 ) {
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location.href = "<?php echo esc_url( home_url() ); ?>/?cat=" + dropdown.options[ dropdown.selectedIndex ].value;
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}
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}
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dropdown.onchange = onCatChange;
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})();
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</script>
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<?php
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return wp_get_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
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}
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/**
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* Registers the `core/categories` block on server.
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*/
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function register_block_core_categories() {
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register_block_type_from_metadata(
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__DIR__ . '/categories',
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array(
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'render_callback' => 'render_block_core_categories',
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)
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);
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}
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add_action( 'init', 'register_block_core_categories' );
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