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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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/** |
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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 gutenberg_render_block_core_categories( $attributes ) { |
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static $block_id = 0; |
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$block_id++; |
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|
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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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); |
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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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|
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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="' . $id . '">' . __( 'Categories' ) . '</label>%2$s</div>'; |
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$items_markup = wp_dropdown_categories( $args ); |
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$type = 'dropdown'; |
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|
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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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gutenberg_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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|
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$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => "wp-block-categories-{$type}" ) ); |
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|
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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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/** |
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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 gutenberg_build_dropdown_script_block_core_categories( $dropdown_id ) { |
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ob_start(); |
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?> |
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<script type='text/javascript'> |
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/* <![CDATA[ */ |
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( function() { |
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var dropdown = document.getElementById( '<?php echo esc_js( $dropdown_id ); ?>' ); |
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function gutenberg_onCatChange() { |
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if ( dropdown.options[ dropdown.selectedIndex ].value > 0 ) { |
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location.href = "<?php echo home_url(); ?>/?cat=" + dropdown.options[ dropdown.selectedIndex ].value; |
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} |
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} |
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dropdown.onchange = gutenberg_onCatChange; |
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})(); |
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/* ]]> */ |
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</script> |
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<?php |
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return ob_get_clean(); |
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} |
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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 gutenberg_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' => 'gutenberg_render_block_core_categories', |
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) |
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); |
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} |
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add_action( 'init', 'gutenberg_register_block_core_categories', 20 ); |
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|
