HTML API: Make WP_HTML_Processor::serialize_token() public.

The serialize_token() method was added in WordPress 6.7.0 as a protected member on the WP_HTML_Processor class. It wasn’t clear at the time of merging if it would be necessary to expose it as a public method. However, since that time a number of experiments have led to the conclusion that it would be very valuable to do so.

This patch opens up the method for invocation from the outside, trivializing the generation of normative HTML subspans from a parent document.

Developed in WordPress/wordpress-develop#9456
Discussed in https://core.trac.wordpress.org/ticket/63823

Follow-up to [59076].

Props dmsnell, jonsurrell.
Fixes #38044.

Built from https://develop.svn.wordpress.org/trunk@60633


git-svn-id: http://core.svn.wordpress.org/trunk@59969 1a063a9b-81f0-0310-95a4-ce76da25c4cd

Author: dmsnell

wp-includes/html-api/class-wp-html-processor.php

@@ -1304,10 +1304,11 @@ public function serialize(): ?string {
 	 * @see static::serialize()
 	 *
 	 * @since 6.7.0
+	 * @since 6.9.0 Converted from protected to public method.
 	 *
 	 * @return string Serialization of token, or empty string if no serialization exists.
 	 */
-	protected function serialize_token(): string {
+	public function serialize_token(): string {
 		$html       = '';
 		$token_type = $this->get_token_type();
 

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.9-alpha-60632';
+$wp_version = '6.9-alpha-60633';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.