Query Loop: Allow "enhanced pagination" only with core blocks

packages/block-library/src/query/edit/enhanced-pagination-modal.js

@@ -0,0 +1,65 @@
+/**
+ * WordPress dependencies
+ */
+import {
+	Button,
+	Modal,
+	__experimentalVStack as VStack,
+} from '@wordpress/components';
+import { __ } from '@wordpress/i18n';
+import { useState, useEffect } from '@wordpress/element';
+
+/**
+ * Internal dependencies
+ */
+import { useContainsThirdPartyBlocks } from '../utils';
+
+const disableEnhancedPaginationDescription = __(
+	'Third-party blocks are not supported inside a Query Loop block with enhanced pagination enabled. To re-enable it, remove any third-party block and then update it in the Query Loop settings.'
+);
+
+const modalDescriptionId =
+	'wp-block-query-enhanced-pagination-modal__description';
+
+export default function EnhancedPaginationModal( {
+	clientId,
+	attributes: { enhancedPagination },
+	setAttributes,
+} ) {
+	const [ isOpen, setOpen ] = useState( false );
+
+	const containsThirdPartyBlocks = useContainsThirdPartyBlocks( clientId );
+
+	useEffect( () => {
+		setOpen( containsThirdPartyBlocks && enhancedPagination );
+	}, [ containsThirdPartyBlocks, enhancedPagination, setOpen ] );
+
+	return (
+		isOpen && (
+			<Modal
+				title={ __( 'Enhanced pagination will be disabled' ) }
+				className={ 'wp-block-query-enhanced-pagination-modal' }
+				aria={ {
+					describedby: modalDescriptionId,
+				} }
+				isDismissible={ false }
+				shouldCloseOnEsc={ false }
+				shouldCloseOnClickOutside={ false }
+			>
+				<VStack alignment="right" spacing={ 8 }>
+					<span id={ modalDescriptionId }>
+						{ disableEnhancedPaginationDescription }
+					</span>
+					<Button
+						variant="primary"
+						onClick={ () => {
+							setAttributes( { enhancedPagination: false } );
+						} }
+					>
+						{ __( 'OK, understood' ) }
+					</Button>
+				</VStack>
+			</Modal>
+		)
+	);
+}

packages/block-library/src/query/edit/inspector-controls/enhanced-pagination-control.js

@@ -0,0 +1,47 @@
+/**
+ * WordPress dependencies
+ */
+import { ToggleControl, Notice } from '@wordpress/components';
+import { __ } from '@wordpress/i18n';
+
+/**
+ * Internal dependencies
+ */
+import { useContainsThirdPartyBlocks } from '../../utils';
+
+export default function EnhancedPaginationControl( {
+	enhancedPagination,
+	setAttributes,
+	clientId,
+} ) {
+	const enhancedPaginationNotice = __(
+		'Enhanced pagination requires all descendants to be Core blocks. If you want to enable it, you have to remove all third-party blocks contained inside the Query Loop block.'
+	);
+
+	const containsThirdPartyBlocks = useContainsThirdPartyBlocks( clientId );
+
+	return (
+		<>
+			<ToggleControl
+				label={ __( 'Enhanced pagination' ) }
+				help={ __(
+					'Browsing between pages won’t require a full page reload.'
+				) }
+				checked={ !! enhancedPagination }
+				disabled={ containsThirdPartyBlocks }
+				onChange={ ( value ) => {
+					setAttributes( {
+						enhancedPagination: !! value,
+					} );
+				} }
+			/>
+			{ containsThirdPartyBlocks && (
+				<div>
+					<Notice status="warning" isDismissible={ false }>
+						{ enhancedPaginationNotice }
+					</Notice>
+				</div>
+			) }
+		</>
+	);
+}

packages/block-library/src/query/edit/inspector-controls/index.js

@@ -17,8 +17,7 @@ import {
 	privateApis as blockEditorPrivateApis,
 } from '@wordpress/block-editor';
 import { debounce } from '@wordpress/compose';
-import { useEffect, useState, useCallback, useRef } from '@wordpress/element';
-import { speak } from '@wordpress/a11y';
+import { useEffect, useState, useCallback } from '@wordpress/element';
 
 /**
  * Internal dependencies
@@ -28,6 +27,7 @@ import AuthorControl from './author-control';
 import ParentControl from './parent-control';
 import { TaxonomyControls } from './taxonomy-controls';
 import StickyControl from './sticky-control';
+import EnhancedPaginationControl from './enhanced-pagination-control';
 import CreateNewPostLink from './create-new-post-link';
 import { unlock } from '../../../lock-unlock';
 import {
@@ -41,7 +41,8 @@ import {
 const { BlockInfo } = unlock( blockEditorPrivateApis );
 
 export default function QueryInspectorControls( props ) {
-	const { attributes, setQuery, setDisplayLayout, setAttributes } = props;
+	const { attributes, setQuery, setDisplayLayout, setAttributes, clientId } =
+		props;
 	const { query, displayLayout, enhancedPagination } = attributes;
 	const {
 		order,
@@ -124,18 +125,6 @@ export default function QueryInspectorControls( props ) {
 		isControlAllowed( allowedControls, 'parents' ) &&
 		isPostTypeHierarchical;
 
-	const enhancedPaginationNotice = __(
-		'Enhanced Pagination might cause interactive blocks within the Post Template to stop working. Disable it if you experience any issues.'
-	);
-
-	const isFirstRender = useRef( true ); // Don't speak on first render.
-	useEffect( () => {
-		if ( ! isFirstRender.current && enhancedPagination ) {
-			speak( enhancedPaginationNotice );
-		}
-		isFirstRender.current = false;
-	}, [ enhancedPagination, enhancedPaginationNotice ] );
-
 	const showFiltersPanel =
 		showTaxControl ||
 		showAuthorControl ||
@@ -215,29 +204,11 @@ export default function QueryInspectorControls( props ) {
 								}
 							/>
 						) }
-						<ToggleControl
-							label={ __( 'Enhanced pagination' ) }
-							help={ __(
-								'Browsing between pages won’t require a full page reload.'
-							) }
-							checked={ !! enhancedPagination }
-							onChange={ ( value ) =>
-								setAttributes( {
-									enhancedPagination: !! value,
-								} )
-							}
+						<EnhancedPaginationControl
+							enhancedPagination={ enhancedPagination }
+							setAttributes={ setAttributes }
+							clientId={ clientId }
 						/>
-						{ enhancedPagination && (
-							<div>
-								<Notice
-									spokenMessage={ null }
-									status="warning"
-									isDismissible={ false }
-								>
-									{ enhancedPaginationNotice }
-								</Notice>
-							</div>
-						) }
 					</PanelBody>
 				</InspectorControls>
 			) }

packages/block-library/src/query/edit/query-content.js

@@ -20,6 +20,7 @@ import { store as coreStore } from '@wordpress/core-data';
  */
 import QueryToolbar from './query-toolbar';
 import QueryInspectorControls from './inspector-controls';
+import EnhancedPaginationModal from './enhanced-pagination-modal';
 
 const DEFAULTS_POSTS_PER_PAGE = 3;
 
@@ -103,13 +104,20 @@ export default function QueryContent( {
 			"The <aside> element should represent a portion of a document whose content is only indirectly related to the document's main content."
 		),
 	};
+
 	return (
 		<>
+			<EnhancedPaginationModal
+				attributes={ attributes }
+				setAttributes={ setAttributes }
+				clientId={ clientId }
+			/>
 			<QueryInspectorControls
 				attributes={ attributes }
 				setQuery={ updateQuery }
 				setDisplayLayout={ updateDisplayLayout }
 				setAttributes={ setAttributes }
+				clientId={ clientId }
 			/>
 			<BlockControls>
 				<QueryToolbar

packages/block-library/src/query/editor.scss

@@ -52,3 +52,9 @@
 		margin-bottom: $grid-unit-30;
 	}
 }
+
+.wp-block-query-enhanced-pagination-modal {
+	@include break-small() {
+		max-width: $break-mobile;
+	}
+}

packages/block-library/src/query/utils.js

@@ -344,3 +344,21 @@ export const usePatterns = ( clientId, name ) => {
 		[ name, clientId ]
 	);
 };
+
+/**
+ * Hook that returns whether the Query Loop with the given `clientId` contains
+ * any third-party block.
+ *
+ * @param {string} clientId The block's client ID.
+ * @return {boolean} True if it contains third-party blocks.
+ */
+export const useContainsThirdPartyBlocks = ( clientId ) =>
+	useSelect( ( select ) => {
+		const { getClientIdsOfDescendants, getBlockName } =
+			select( blockEditorStore );
+
+		return getClientIdsOfDescendants( [ clientId ] ).some(
+			( descendantClientId ) =>
+				! getBlockName( descendantClientId ).startsWith( 'core/' )
+		);
+	} );