Handline PRE,LISTING

Author: sirreal

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

@@ -1359,21 +1359,21 @@ public function serialize_token(): string {
 
 			case '#text':
 				$text = $this->get_modifiable_text();
-				if (
-					WP_HTML_Tag_Processor::TEXT_IS_WHITESPACE === $this->text_node_classification &&
-					'PRE' === $this->state->stack_of_open_elements->at( $this->state->stack_of_open_elements->count() - 1 )?->node_name
-				) {
-					/*
-					 * DO NOT DO THIS
-					 * This case is exceptional and we must peek at processor internals.
-					 */
-					$newline_was_erased = Closure::bind(
-						fn () => $this->skip_newline_at === $this->token_starts_at,
-						$this,
-						WP_HTML_Tag_Processor::class
-					)();
-					if ( $newline_was_erased ) {
-						$text = "\n{$text}";
+				if ( WP_HTML_Tag_Processor::TEXT_IS_WHITESPACE === $this->text_node_classification ) {
+					$parent_node_name = $this->state->stack_of_open_elements->at( $this->state->stack_of_open_elements->count() - 1 )?->node_name;
+					if ( 'PRE' === $parent_node_name || 'LISTING' === $parent_node_name ) {
+						/*
+						 * DO NOT DO THIS
+						 * This case is exceptional and we must peek at processor internals.
+						 */
+						$newline_was_erased = Closure::bind(
+							fn () => $this->skip_newline_at === $this->token_starts_at,
+							$this,
+							WP_HTML_Tag_Processor::class
+						)();
+						if ( $newline_was_erased ) {
+							$text = "\n{$text}";
+						}
 					}
 				}
 				$html .= htmlspecialchars( $text, ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML5, 'UTF-8' );