render_block_core_navigation_submenu( array $attributes, string $content, WP_Block $block ): string

67function render_block_core_navigation_submenu( $attributes, $content, $block ) {68	$navigation_link_has_id = isset( $attributes['id'] ) && is_numeric( $attributes['id'] );69	$is_post_type           = isset( $attributes['kind'] ) && 'post-type' === $attributes['kind'];70	$is_post_type           = $is_post_type || isset( $attributes['type'] ) && ( 'post' === $attributes['type'] || 'page' === $attributes['type'] );71 72	// Don't render the block's subtree if it is a draft.73	if ( $is_post_type && $navigation_link_has_id && 'publish' !== get_post_status( $attributes['id'] ) ) {74		return '';75	}76 77	// Don't render the block's subtree if it has no label.78	if ( empty( $attributes['label'] ) ) {79		return '';80	}81 82	$font_sizes      = block_core_navigation_submenu_build_css_font_sizes( $block->context );83	$style_attribute = $font_sizes['inline_styles'];84 85	$css_classes = trim( implode( ' ', $font_sizes['css_classes'] ) );86	$has_submenu = count( $block->inner_blocks ) > 0;87	$kind        = empty( $attributes['kind'] ) ? 'post_type' : str_replace( '-', '_', $attributes['kind'] );88	$is_active   = ! empty( $attributes['id'] ) && get_queried_object_id() === (int) $attributes['id'] && ! empty( get_queried_object()->$kind );89 90	if ( is_post_type_archive() ) {91		$queried_archive_link = get_post_type_archive_link( get_queried_object()->name );92		if ( $attributes['url'] === $queried_archive_link ) {93			$is_active = true;94		}95	}96 97	$show_submenu_indicators = isset( $block->context['showSubmenuIcon'] ) && $block->context['showSubmenuIcon'];98	$open_on_click           = isset( $block->context['openSubmenusOnClick'] ) && $block->context['openSubmenusOnClick'];99	$open_on_hover_and_click = isset( $block->context['openSubmenusOnClick'] ) && ! $block->context['openSubmenusOnClick'] &&100		$show_submenu_indicators;101 102	$wrapper_attributes = get_block_wrapper_attributes(103		array(104			'class' => $css_classes . ' wp-block-navigation-item' . ( $has_submenu ? ' has-child' : '' ) .105			( $open_on_click ? ' open-on-click' : '' ) . ( $open_on_hover_and_click ? ' open-on-hover-click' : '' ) .106			( $is_active ? ' current-menu-item' : '' ),107			'style' => $style_attribute,108		)109	);110 111	$label = '';112 113	if ( isset( $attributes['label'] ) ) {114		$label .= wp_kses_post( $attributes['label'] );115	}116 117	$aria_label = sprintf(118		/* translators: Accessibility text. %s: Parent page title. */119		__( '%s submenu' ),120		wp_strip_all_tags( $label )121	);122 123	$html = '<li ' . $wrapper_attributes . '>';124 125	// If Submenus open on hover, we render an anchor tag with attributes.126	// If submenu icons are set to show, we also render a submenu button, so the submenu can be opened on click.127	if ( ! $open_on_click ) {128		$item_url = isset( $attributes['url'] ) ? $attributes['url'] : '';129		// Start appending HTML attributes to anchor tag.130		$html .= '<a class="wp-block-navigation-item__content"';131 132		// The href attribute on a and area elements is not required;133		// when those elements do not have href attributes they do not create hyperlinks.134		// But also The href attribute must have a value that is a valid URL potentially135		// surrounded by spaces.136		// see: https://html.spec.whatwg.org/multipage/links.html#links-created-by-a-and-area-elements.137		if ( ! empty( $item_url ) ) {138			$html .= ' href="' . esc_url( $item_url ) . '"';139		}140 141		if ( $is_active ) {142			$html .= ' aria-current="page"';143		}144 145		if ( isset( $attributes['opensInNewTab'] ) && true === $attributes['opensInNewTab'] ) {146			$html .= ' target="_blank"  ';