HTML API: Expect closer on foreign content void lookalike elements.

Ensure that expects_closer returns false on tags that look like void HTML tags, but are actually not void tags in foreign content.

Reviewed by westonruter, jorbin.
Merges [59392] to the 6.7 branch.

Props jonsurrell, bernhard-reiter.
Fixes #62363.


git-svn-id: https://develop.svn.wordpress.org/branches/6.7@59694 602fd350-edb4-49c9-b593-d223f7449a82

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

@@ -804,7 +804,7 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
 			// Doctype declarations.
 			'html' === $token_name ||
 			// Void elements.
-			self::is_void( $token_name ) ||
+			( 'html' === $token_namespace && self::is_void( $token_name ) ) ||
 			// Special atomic elements.
 			( 'html' === $token_namespace && in_array( $token_name, array( 'IFRAME', 'NOEMBED', 'NOFRAMES', 'SCRIPT', 'STYLE', 'TEXTAREA', 'TITLE', 'XMP' ), true ) ) ||
 			// Self-closing elements in foreign content.

tests/phpunit/tests/html-api/wpHtmlProcessor.php

@@ -561,6 +561,31 @@ class Tests_HtmlApi_WpHtmlProcessor extends WP_UnitTestCase {
 		$this->assertTrue( $processor->expects_closer() );
 	}
 
+	/**
+	 * Ensures that expects_closer works for void-like elements in foreign content.
+	 *
+	 * For example, `<svg><input>text` creates an `svg:input` that contains a text node.
+	 * This input should not be treated as a void tag and _should_ expect a close tag.
+	 *
+	 * @dataProvider data_void_tags
+	 *
+	 * @ticket 62363
+	 */
+	public function test_expects_closer_foreign_content_not_void( string $void_tag ) {
+		$processor = WP_HTML_Processor::create_fragment( "<svg><{$void_tag}>" );
+
+		$this->assertTrue( $processor->next_tag( $void_tag ) );
+
+		// Some void-like tags will close the SVG element and be HTML tags.
+		if ( $processor->get_namespace() === 'svg' ) {
+			$this->assertSame( array( 'HTML', 'BODY', 'SVG', $void_tag ), $processor->get_breadcrumbs() );
+			$this->assertTrue( $processor->expects_closer() );
+		} else {
+			$this->assertSame( array( 'HTML', 'BODY', $void_tag ), $processor->get_breadcrumbs() );
+			$this->assertFalse( $processor->expects_closer() );
+		}
+	}
+
 	/**
 	 * Ensures that self-closing foreign SCRIPT elements are properly found.
 	 *