diff -r be944660c56a -r 3d72ae0968f4 wp/wp-includes/blocks/navigation-link.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/blocks/navigation-link.php	Tue Sep 27 16:37:53 2022 +0200
@@ -0,0 +1,339 @@
+<?php
+/**
+ * Server-side rendering of the `core/navigation-link` block.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Build an array with CSS classes and inline styles defining the colors
+ * which will be applied to the navigation markup in the front-end.
+ *
+ * @param  array $context    Navigation block context.
+ * @param  array $attributes Block attributes.
+ * @return array Colors CSS classes and inline styles.
+ */
+function block_core_navigation_link_build_css_colors( $context, $attributes ) {
+	$colors = array(
+		'css_classes'   => array(),
+		'inline_styles' => '',
+	);
+
+	$is_sub_menu = isset( $attributes['isTopLevelLink'] ) ? ( ! $attributes['isTopLevelLink'] ) : false;
+
+	// Text color.
+	$named_text_color  = null;
+	$custom_text_color = null;
+
+	if ( $is_sub_menu && array_key_exists( 'customOverlayTextColor', $context ) ) {
+		$custom_text_color = $context['customOverlayTextColor'];
+	} elseif ( $is_sub_menu && array_key_exists( 'overlayTextColor', $context ) ) {
+		$named_text_color = $context['overlayTextColor'];
+	} elseif ( array_key_exists( 'customTextColor', $context ) ) {
+		$custom_text_color = $context['customTextColor'];
+	} elseif ( array_key_exists( 'textColor', $context ) ) {
+		$named_text_color = $context['textColor'];
+	} elseif ( isset( $context['style']['color']['text'] ) ) {
+		$custom_text_color = $context['style']['color']['text'];
+	}
+
+	// If has text color.
+	if ( ! is_null( $named_text_color ) ) {
+		// Add the color class.
+		array_push( $colors['css_classes'], 'has-text-color', sprintf( 'has-%s-color', $named_text_color ) );
+	} elseif ( ! is_null( $custom_text_color ) ) {
+		// Add the custom color inline style.
+		$colors['css_classes'][]  = 'has-text-color';
+		$colors['inline_styles'] .= sprintf( 'color: %s;', $custom_text_color );
+	}
+
+	// Background color.
+	$named_background_color  = null;
+	$custom_background_color = null;
+
+	if ( $is_sub_menu && array_key_exists( 'customOverlayBackgroundColor', $context ) ) {
+		$custom_background_color = $context['customOverlayBackgroundColor'];
+	} elseif ( $is_sub_menu && array_key_exists( 'overlayBackgroundColor', $context ) ) {
+		$named_background_color = $context['overlayBackgroundColor'];
+	} elseif ( array_key_exists( 'customBackgroundColor', $context ) ) {
+		$custom_background_color = $context['customBackgroundColor'];
+	} elseif ( array_key_exists( 'backgroundColor', $context ) ) {
+		$named_background_color = $context['backgroundColor'];
+	} elseif ( isset( $context['style']['color']['background'] ) ) {
+		$custom_background_color = $context['style']['color']['background'];
+	}
+
+	// If has background color.
+	if ( ! is_null( $named_background_color ) ) {
+		// Add the background-color class.
+		array_push( $colors['css_classes'], 'has-background', sprintf( 'has-%s-background-color', $named_background_color ) );
+	} elseif ( ! is_null( $custom_background_color ) ) {
+		// Add the custom background-color inline style.
+		$colors['css_classes'][]  = 'has-background';
+		$colors['inline_styles'] .= sprintf( 'background-color: %s;', $custom_background_color );
+	}
+
+	return $colors;
+}
+
+/**
+ * Build an array with CSS classes and inline styles defining the font sizes
+ * which will be applied to the navigation markup in the front-end.
+ *
+ * @param  array $context Navigation block context.
+ * @return array Font size CSS classes and inline styles.
+ */
+function block_core_navigation_link_build_css_font_sizes( $context ) {
+	// CSS classes.
+	$font_sizes = array(
+		'css_classes'   => array(),
+		'inline_styles' => '',
+	);
+
+	$has_named_font_size  = array_key_exists( 'fontSize', $context );
+	$has_custom_font_size = isset( $context['style']['typography']['fontSize'] );
+
+	if ( $has_named_font_size ) {
+		// Add the font size class.
+		$font_sizes['css_classes'][] = sprintf( 'has-%s-font-size', $context['fontSize'] );
+	} elseif ( $has_custom_font_size ) {
+		// Add the custom font size inline style.
+		$font_sizes['inline_styles'] = sprintf( 'font-size: %s;', $context['style']['typography']['fontSize'] );
+	}
+
+	return $font_sizes;
+}
+
+/**
+ * Returns the top-level submenu SVG chevron icon.
+ *
+ * @return string
+ */
+function block_core_navigation_link_render_submenu_icon() {
+	return '<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" aria-hidden="true" focusable="false"><path d="M1.50002 4L6.00002 8L10.5 4" stroke-width="1.5"></path></svg>';
+}
+
+/**
+ * Renders the `core/navigation-link` block.
+ *
+ * @param array    $attributes The block attributes.
+ * @param string   $content    The saved content.
+ * @param WP_Block $block      The parsed block.
+ *
+ * @return string Returns the post content with the legacy widget added.
+ */
+function render_block_core_navigation_link( $attributes, $content, $block ) {
+	$navigation_link_has_id = isset( $attributes['id'] ) && is_numeric( $attributes['id'] );
+	$is_post_type           = isset( $attributes['kind'] ) && 'post-type' === $attributes['kind'];
+	$is_post_type           = $is_post_type || isset( $attributes['type'] ) && ( 'post' === $attributes['type'] || 'page' === $attributes['type'] );
+
+	// Don't render the block's subtree if it is a draft or if the ID does not exist.
+	if ( $is_post_type && $navigation_link_has_id ) {
+		$post = get_post( $attributes['id'] );
+		if ( ! $post || 'publish' !== $post->post_status ) {
+			return '';
+		}
+	}
+
+	// Don't render the block's subtree if it has no label.
+	if ( empty( $attributes['label'] ) ) {
+		return '';
+	}
+
+	$colors          = block_core_navigation_link_build_css_colors( $block->context, $attributes );
+	$font_sizes      = block_core_navigation_link_build_css_font_sizes( $block->context );
+	$classes         = array_merge(
+		$colors['css_classes'],
+		$font_sizes['css_classes']
+	);
+	$style_attribute = ( $colors['inline_styles'] . $font_sizes['inline_styles'] );
+
+	$css_classes = trim( implode( ' ', $classes ) );
+	$has_submenu = count( $block->inner_blocks ) > 0;
+	$is_active   = ! empty( $attributes['id'] ) && ( get_the_ID() === $attributes['id'] );
+
+	$wrapper_attributes = get_block_wrapper_attributes(
+		array(
+			'class' => $css_classes . ' wp-block-navigation-item' . ( $has_submenu ? ' has-child' : '' ) .
+				( $is_active ? ' current-menu-item' : '' ),
+			'style' => $style_attribute,
+		)
+	);
+	$html               = '<li ' . $wrapper_attributes . '>' .
+		'<a class="wp-block-navigation-item__content" ';
+
+	// Start appending HTML attributes to anchor tag.
+	if ( isset( $attributes['url'] ) ) {
+		$html .= ' href="' . esc_url( $attributes['url'] ) . '"';
+	}
+
+	if ( $is_active ) {
+		$html .= ' aria-current="page"';
+	}
+
+	if ( isset( $attributes['opensInNewTab'] ) && true === $attributes['opensInNewTab'] ) {
+		$html .= ' target="_blank"  ';
+	}
+
+	if ( isset( $attributes['rel'] ) ) {
+		$html .= ' rel="' . esc_attr( $attributes['rel'] ) . '"';
+	} elseif ( isset( $attributes['nofollow'] ) && $attributes['nofollow'] ) {
+		$html .= ' rel="nofollow"';
+	}
+
+	if ( isset( $attributes['title'] ) ) {
+		$html .= ' title="' . esc_attr( $attributes['title'] ) . '"';
+	}
+
+	// End appending HTML attributes to anchor tag.
+
+	// Start anchor tag content.
+	$html .= '>' .
+		// Wrap title with span to isolate it from submenu icon.
+		'<span class="wp-block-navigation-item__label">';
+
+	if ( isset( $attributes['label'] ) ) {
+		$html .= wp_kses_post( $attributes['label'] );
+	}
+
+	$html .= '</span>';
+
+	// Add description if available.
+	if ( ! empty( $attributes['description'] ) ) {
+		$html .= '<span class="wp-block-navigation-item__description">';
+		$html .= wp_kses_post( $attributes['description'] );
+		$html .= '</span>';
+	}
+
+	$html .= '</a>';
+	// End anchor tag content.
+
+	if ( isset( $block->context['showSubmenuIcon'] ) && $block->context['showSubmenuIcon'] && $has_submenu ) {
+		// The submenu icon can be hidden by a CSS rule on the Navigation Block.
+		$html .= '<span class="wp-block-navigation__submenu-icon">' . block_core_navigation_link_render_submenu_icon() . '</span>';
+	}
+
+	if ( $has_submenu ) {
+		$inner_blocks_html = '';
+		foreach ( $block->inner_blocks as $inner_block ) {
+			$inner_blocks_html .= $inner_block->render();
+		}
+
+		$html .= sprintf(
+			'<ul class="wp-block-navigation__submenu-container">%s</ul>',
+			$inner_blocks_html
+		);
+	}
+
+	$html .= '</li>';
+
+	return $html;
+}
+
+/**
+ * Returns a navigation link variation
+ *
+ * @param WP_Taxonomy|WP_Post_Type $entity post type or taxonomy entity.
+ * @param string                   $kind string of value 'taxonomy' or 'post-type'.
+ *
+ * @return array
+ */
+function build_variation_for_navigation_link( $entity, $kind ) {
+	$title       = '';
+	$description = '';
+
+	if ( property_exists( $entity->labels, 'item_link' ) ) {
+		$title = $entity->labels->item_link;
+	}
+	if ( property_exists( $entity->labels, 'item_link_description' ) ) {
+		$description = $entity->labels->item_link_description;
+	}
+
+	$variation = array(
+		'name'        => $entity->name,
+		'title'       => $title,
+		'description' => $description,
+		'attributes'  => array(
+			'type' => $entity->name,
+			'kind' => $kind,
+		),
+	);
+
+	// Tweak some value for the variations.
+	$variation_overrides = array(
+		'post_tag'    => array(
+			'name'       => 'tag',
+			'attributes' => array(
+				'type' => 'tag',
+				'kind' => $kind,
+			),
+		),
+		'post_format' => array(
+			// The item_link and item_link_description for post formats is the
+			// same as for tags, so need to be overridden.
+			'title'       => __( 'Post Format Link' ),
+			'description' => __( 'A link to a post format' ),
+			'attributes'  => array(
+				'type' => 'post_format',
+				'kind' => $kind,
+			),
+		),
+	);
+
+	if ( array_key_exists( $entity->name, $variation_overrides ) ) {
+		$variation = array_merge(
+			$variation,
+			$variation_overrides[ $entity->name ]
+		);
+	}
+
+	return $variation;
+}
+
+/**
+ * Register the navigation link block.
+ *
+ * @uses render_block_core_navigation()
+ * @throws WP_Error An WP_Error exception parsing the block definition.
+ */
+function register_block_core_navigation_link() {
+	$post_types = get_post_types( array( 'show_in_nav_menus' => true ), 'objects' );
+	$taxonomies = get_taxonomies( array( 'show_in_nav_menus' => true ), 'objects' );
+
+	// Use two separate arrays as a way to order the variations in the UI.
+	// Known variations (like Post Link and Page Link) are added to the
+	// `built_ins` array. Variations for custom post types and taxonomies are
+	// added to the `variations` array and will always appear after `built-ins.
+	$built_ins  = array();
+	$variations = array();
+
+	if ( $post_types ) {
+		foreach ( $post_types as $post_type ) {
+			$variation = build_variation_for_navigation_link( $post_type, 'post-type' );
+			if ( $post_type->_builtin ) {
+				$built_ins[] = $variation;
+			} else {
+				$variations[] = $variation;
+			}
+		}
+	}
+	if ( $taxonomies ) {
+		foreach ( $taxonomies as $taxonomy ) {
+			$variation = build_variation_for_navigation_link( $taxonomy, 'taxonomy' );
+			if ( $taxonomy->_builtin ) {
+				$built_ins[] = $variation;
+			} else {
+				$variations[] = $variation;
+			}
+		}
+	}
+
+	register_block_type_from_metadata(
+		__DIR__ . '/navigation-link',
+		array(
+			'render_callback' => 'render_block_core_navigation_link',
+			'variations'      => array_merge( $built_ins, $variations ),
+		)
+	);
+}
+add_action( 'init', 'register_block_core_navigation_link' );