1 files changed, 65 insertions, 0 deletions
diff --git a/wp-includes/blocks/site-title.php b/wp-includes/blocks/site-title.php
new file mode 100644
index 0000000..255615b
--- /dev/null
+++ b/wp-includes/blocks/site-title.php
@@ -0,0 +1,65 @@
+<?php
+/**
+ * Server-side rendering of the `core/site-title` block.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Renders the `core/site-title` block on the server.
+ *
+ * @param array $attributes The block attributes.
+ *
+ * @return string The render.
+ */
+function render_block_core_site_title( $attributes ) {
+	$site_title = get_bloginfo( 'name' );
+	if ( ! $site_title ) {
+		return;
+	}
+
+	$tag_name = 'h1';
+	$classes  = empty( $attributes['textAlign'] ) ? '' : "has-text-align-{$attributes['textAlign']}";
+	if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
+		$classes .= ' has-link-color';
+	}
+
+	if ( isset( $attributes['level'] ) ) {
+		$tag_name = 0 === $attributes['level'] ? 'p' : 'h' . (int) $attributes['level'];
+	}
+
+	if ( $attributes['isLink'] ) {
+		$aria_current = is_home() || ( is_front_page() && 'page' === get_option( 'show_on_front' ) ) ? ' aria-current="page"' : '';
+		$link_target  = ! empty( $attributes['linkTarget'] ) ? $attributes['linkTarget'] : '_self';
+
+		$site_title = sprintf(
+			'<a href="%1$s" target="%2$s" rel="home"%3$s>%4$s</a>',
+			esc_url( home_url() ),
+			esc_attr( $link_target ),
+			$aria_current,
+			esc_html( $site_title )
+		);
+	}
+	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => trim( $classes ) ) );
+
+	return sprintf(
+		'<%1$s %2$s>%3$s</%1$s>',
+		$tag_name,
+		$wrapper_attributes,
+		// already pre-escaped if it is a link.
+		$attributes['isLink'] ? $site_title : esc_html( $site_title )
+	);
+}
+
+/**
+ * Registers the `core/site-title` block on the server.
+ */
+function register_block_core_site_title() {
+	register_block_type_from_metadata(
+		__DIR__ . '/site-title',
+		array(
+			'render_callback' => 'render_block_core_site_title',
+		)
+	);
+}
+add_action( 'init', 'register_block_core_site_title' );