HTML API: Explore refactors of splitting CSS names.

Author: dmsnell

src/wp-includes/block-supports/dimensions.php

@@ -143,7 +143,7 @@ function wp_render_dimensions_support( $block_content, $block ) {
 			$tags->set_attribute( 'style', $updated_style );
 
 			if ( ! empty( $styles['classnames'] ) ) {
-				foreach ( explode( ' ', $styles['classnames'] ) as $class_name ) {
+				foreach ( WP_HTML_Tag_Processor::parse_class_list( $styles['classnames'] ) as $class_name ) {
 					if (
 						str_contains( $class_name, 'aspect-ratio' ) &&
 						! isset( $block_attributes['style']['dimensions']['aspectRatio'] )

src/wp-includes/bookmark-template.php

@@ -234,11 +234,11 @@ function wp_list_bookmarks( $args = '' ) {
 
 	$output = '';
 
-	if ( ! is_array( $parsed_args['class'] ) ) {
-		$parsed_args['class'] = explode( ' ', $parsed_args['class'] );
+	if ( is_string( $parsed_args['class'] ) ) {
+		$parsed_args['class'] = iterator_to_array( WP_HTML_Tag_Processor::parse_class_list( $parsed_args['class'] ) );
 	}
 	$parsed_args['class'] = array_map( 'sanitize_html_class', $parsed_args['class'] );
-	$parsed_args['class'] = trim( implode( ' ', $parsed_args['class'] ) );
+	$parsed_args['class'] = implode( ' ', $parsed_args['class'] );
 
 	if ( $parsed_args['categorize'] ) {
 		$cats = get_terms(

src/wp-includes/class-wp-duotone.php

@@ -1180,8 +1180,7 @@ public static function restore_image_outer_container( $block_content ) {
 		$tags->set_bookmark( 'wrapper-div' );
 		$tags->next_tag();
 
-		$inner_classnames = explode( ' ', $tags->get_attribute( 'class' ) );
-		foreach ( $inner_classnames as $classname ) {
+		foreach ( WP_HTML_Tag_Processor::parse_class_list( $tags->get_attribute( 'class' ) ) as $classname ) {
 			if ( 0 === strpos( $classname, 'wp-duotone' ) ) {
 				$tags->remove_class( $classname );
 				$tags->seek( 'wrapper-div' );

src/wp-includes/customize/class-wp-customize-nav-menu-item-setting.php

@@ -617,7 +617,7 @@ public function value_as_wp_post_nav_menu_item() {
 
 		// 'classes' should be an array, as in wp_setup_nav_menu_item().
 		if ( isset( $item->classes ) && is_scalar( $item->classes ) ) {
-			$item->classes = explode( ' ', $item->classes );
+			$item->classes = iterator_to_array( WP_HTML_Tag_Processor::parse_class_list( $item->classes ) );
 		}
 
 		$item->ID    = $this->post_id;

src/wp-includes/nav-menu.php

@@ -594,7 +594,7 @@ function wp_update_nav_menu_item( $menu_id = 0, $menu_item_db_id = 0, $menu_item
 	update_post_meta( $menu_item_db_id, '_menu_item_object', sanitize_key( $args['menu-item-object'] ) );
 	update_post_meta( $menu_item_db_id, '_menu_item_target', sanitize_key( $args['menu-item-target'] ) );
 
-	$args['menu-item-classes'] = array_map( 'sanitize_html_class', explode( ' ', $args['menu-item-classes'] ) );
+	$args['menu-item-classes'] = array_map( 'sanitize_html_class', iterator_to_array( WP_HTML_Tag_Processor::parse_class_list( $args['menu-item-classes'] ) ) );
 	$args['menu-item-xfn']     = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['menu-item-xfn'] ) ) );
 	update_post_meta( $menu_item_db_id, '_menu_item_classes', $args['menu-item-classes'] );
 	update_post_meta( $menu_item_db_id, '_menu_item_xfn', $args['menu-item-xfn'] );