[RNMobile] Fix error when pasting deeply nested structure content

packages/react-native-editor/CHANGELOG.md

@@ -12,6 +12,7 @@ For each user feature we should also add a importance categorization label  to i
 ## Unreleased
 -   [*] Synced Patterns: Fix visibility of heading section when used with block based themes in dark mode [#55399]
 -   [*] Classic block: Add option to convert to blocks [#55461]
+-   [*] Fix error when pasting deeply nested structure content [#55613]
 
 ## 1.106.0
 -   [*] Exit Preformatted and Verse blocks by triple pressing the Return key [#53354]

packages/react-native-editor/src/jsdom-patches.js

@@ -29,23 +29,25 @@ const { NO_MODIFICATION_ALLOWED_ERR, HIERARCHY_REQUEST_ERR, NOT_FOUND_ERR } =
 	core;
 
 /**
- * Simple recursive implementation of Node.contains method
+ * Copy of Node.contains polyfill from polyfill-library package (https://t.ly/mehjW).
+ * This polyfill was originally used in WordPress Core (https://t.ly/4o7wQ).
  *
- * @param {number} otherNode Another node (may be the same node).
- * @return {boolean} true if otherNode is a descendant of this node, or is this
- * node, false otherwise.
+ * @param {number} node Node to check.
+ * @return {boolean} true if passed node is a descendant of this node, or the
+ * same node, false otherwise.
  *
  * This function is necessary in the mobile environment, because there are code
  * paths that make use of functions in the Gutenberg (web) project, which has
  * expectation that this is implemented (as it is in the browser environment).
  */
-Node.prototype.contains = function ( otherNode ) {
-	return (
-		this === otherNode ||
-		Array.prototype.some.call( this._childNodes, ( childNode ) => {
-			return childNode.contains( otherNode );
-		} )
-	);
+Node.prototype.contains = function ( node ) {
+	do {
+		if ( this === node ) {
+			return true;
+		}
+	} while ( ( node = node && node.parentNode ) );
+
+	return false;
 };
 
 /**

test/native/jest.config.js

@@ -18,6 +18,19 @@ const transpiledPackageNames = glob( 'packages/*/src/index.{js,ts}' ).map(
 	( fileName ) => fileName.split( '/' )[ 1 ]
 );
 
+// The following unit tests related to the `raw-handling` API will be enabled when addressing
+// the various errors we encounter when running them in the native version.
+// Reference: https://github.com/WordPress/gutenberg/issues/55652
+const RAW_HANDLING_UNSUPPORTED_UNIT_TESTS = [
+	'html-formatting-remover',
+	'phrasing-content-reducer',
+	'ms-list-converter',
+	'figure-content-reducer',
+	'special-comment-converter',
+	'normalise-blocks',
+	'image-corrector',
+];
+
 module.exports = {
 	rootDir: '../../',
 	// Automatically clear mock calls and instances between every test.
@@ -29,6 +42,10 @@ module.exports = {
 		'<rootDir>/test/**/*.native.[jt]s?(x)',
 		'<rootDir>/**/test/!(helper)*.native.[jt]s?(x)',
 		'<rootDir>/packages/react-native-*/**/?(*.)+(spec|test).[jt]s?(x)',
+		// Enable `raw-handling` API unit tests to check jsdom patches.
+		`<rootDir>/packages/blocks/src/api/raw-handling/**/test/!(${ RAW_HANDLING_UNSUPPORTED_UNIT_TESTS.join(
+			'|'
+		) }).[jt]s?(x)`,
 	],
 	testPathIgnorePatterns: [ '/node_modules/', '/__device-tests__/' ],
 	testEnvironmentOptions: {