Split into separate functions and mark unstable

packages/block-editor/src/components/rich-text/list-edit.native.js

@@ -6,7 +6,8 @@ import { Toolbar } from '@wordpress/components';
 import { __ } from '@wordpress/i18n';
 import {
 	changeListType,
-	getLineListFormat,
+	__unstableGetLineNestingLevel,
+	__unstableGetLineListFormat,
 } from '@wordpress/rich-text';
 
 /**
@@ -22,7 +23,7 @@ import BlockFormatControls from '../block-format-controls';
  *                   inner list is selected.
  */
 function isListRootSelected( value ) {
-	return getLineListFormat( value ).nestingLevel < 1;
+	return __unstableGetLineNestingLevel( value ) < 1;
 }
 
 /**
@@ -35,7 +36,7 @@ function isListRootSelected( value ) {
  * @return {boolean}             [description]
  */
 function isActiveListType( tagName, rootTagName, value ) {
-	const listFormat = getLineListFormat( value );
+	const listFormat = __unstableGetLineListFormat( value );
 
 	if ( ! listFormat || ! listFormat.type ) {
 		return tagName === rootTagName;

packages/rich-text/src/get-line-list-format.js

@@ -5,16 +5,16 @@
 import { getLineIndex } from './get-line-index';
 
 /**
- * Returns the nesting level of the list at the selection start position.
+ * Returns the list format of the line at the selection start position.
  *
  * @param {Object} value     The rich-text value
  *
- * @return {Object} Object with { nestingLevel, listFormat }.
+ * @return {Object} Object with listFormat.
  */
 export function getLineListFormat( value ) {
-	const { text, replacements, start, end } = value;
+	const { replacements, start } = value;
 	const startingLineIndex = getLineIndex( value, start );
 	const startLineFormats = replacements[ startingLineIndex ] || [];
 	const [ listFormat ] = startLineFormats.slice( -1 );
-	return { nestingLevel: startLineFormats.length, ...listFormat };
+	return listFormat;
 }

packages/rich-text/src/get-line-nesting-level.js

@@ -0,0 +1,19 @@
+/**
+ * Internal dependencies
+ */
+
+import { getLineIndex } from './get-line-index';
+
+/**
+ * Returns the nesting level of the list at the selection start position.
+ *
+ * @param {Object} value     The rich-text value
+ *
+ * @return {number} The list nesting level, starting from 0.
+ */
+export function getLineNestingLevel( value ) {
+	const { replacements, start } = value;
+	const startingLineIndex = getLineIndex( value, start );
+	const startLineFormats = replacements[ startingLineIndex ] || [];
+	return startLineFormats.length;
+}

packages/rich-text/src/index.js

@@ -12,7 +12,8 @@ export { getActiveObject } from './get-active-object';
 export { getSelectionEnd } from './get-selection-end';
 export { getSelectionStart } from './get-selection-start';
 export { getTextContent } from './get-text-content';
-export { getLineListFormat } from './get-line-list-format';
+export { getLineNestingLevel as __unstableGetLineNestingLevel } from './get-line-nesting-level';
+export { getLineListFormat as __unstableGetLineListFormat } from './get-line-list-format';
 export { isCollapsed } from './is-collapsed';
 export { isEmpty, isEmptyLine } from './is-empty';
 export { join } from './join';