High priority fixes for 6.3.1

packages/block-library/src/footnotes/index.php

@@ -34,7 +34,7 @@ function render_block_core_footnotes( $attributes, $content, $block ) {
 
 	$footnotes = json_decode( $footnotes, true );
 
-	if ( count( $footnotes ) === 0 ) {
+	if ( ! is_array( $footnotes ) || count( $footnotes ) === 0 ) {
 		return '';
 	}
 
@@ -98,7 +98,7 @@ function wp_save_footnotes_meta( $revision_id ) {
 
 		if ( $footnotes ) {
 			// Can't use update_post_meta() because it doesn't allow revisions.
-			update_metadata( 'post', $revision_id, 'footnotes', $footnotes );
+			update_metadata( 'post', $revision_id, 'footnotes', wp_slash( $footnotes ) );
 		}
 	}
 }
@@ -154,15 +154,14 @@ function wp_add_footnotes_revisions_to_post_meta( $post ) {
 
 			if ( $footnotes ) {
 				// Can't use update_post_meta() because it doesn't allow revisions.
-				update_metadata( 'post', $wp_temporary_footnote_revision_id, 'footnotes', $footnotes );
+				update_metadata( 'post', $wp_temporary_footnote_revision_id, 'footnotes', wp_slash( $footnotes ) );
 			}
 		}
 	}
 }
 
-foreach ( array( 'post', 'page' ) as $post_type ) {
-	add_action( "rest_after_insert_{$post_type}", 'wp_add_footnotes_revisions_to_post_meta' );
-}
+add_action( 'rest_after_insert_post', 'wp_add_footnotes_revisions_to_post_meta' );
+add_action( 'rest_after_insert_page', 'wp_add_footnotes_revisions_to_post_meta' );
 
 /**
  * Restores the footnotes meta value from the revision.
@@ -176,7 +175,7 @@ function wp_restore_footnotes_from_revision( $post_id, $revision_id ) {
 	$footnotes = get_post_meta( $revision_id, 'footnotes', true );
 
 	if ( $footnotes ) {
-		update_post_meta( $post_id, 'footnotes', $footnotes );
+		update_post_meta( $post_id, 'footnotes', wp_slash( $footnotes ) );
 	} else {
 		delete_post_meta( $post_id, 'footnotes' );
 	}
@@ -243,7 +242,7 @@ function _wp_rest_api_autosave_meta( $autosave ) {
 		return;
 	}
 
-	update_post_meta( $id, 'footnotes', $body['meta']['footnotes'] );
+	update_post_meta( $id, 'footnotes', wp_slash( $body['meta']['footnotes'] ) );
 }
 // See https://github.com/WordPress/wordpress-develop/blob/2103cb9966e57d452c94218bbc3171579b536a40/src/wp-includes/rest-api/endpoints/class-wp-rest-autosaves-controller.php#L391C1-L391C1.
 add_action( 'wp_creating_autosave', '_wp_rest_api_autosave_meta' );

packages/core-data/src/entity-provider.js

@@ -229,6 +229,15 @@ export function useEntityBlockEditor( kind, name, { id: _id } = {} ) {
 			);
 
 			function updateAttributes( attributes ) {
+				// Only attempt to update attributes, if attributes is an object.
+				if (
+					! attributes ||
+					Array.isArray( attributes ) ||
+					typeof attributes !== 'object'
+				) {
+					return attributes;
+				}
+
 				attributes = { ...attributes };
 
 				for ( const key in attributes ) {

packages/edit-post/src/components/layout/index.js

@@ -31,7 +31,7 @@ import {
 	InterfaceSkeleton,
 	store as interfaceStore,
 } from '@wordpress/interface';
-import { useState, useEffect, useCallback } from '@wordpress/element';
+import { useState, useEffect, useCallback, useMemo } from '@wordpress/element';
 import { store as keyboardShortcutsStore } from '@wordpress/keyboard-shortcuts';
 import { store as noticesStore } from '@wordpress/notices';
 
@@ -70,6 +70,57 @@ const interfaceLabels = {
 	footer: __( 'Editor footer' ),
 };
 
+function useEditorStyles() {
+	const { hasThemeStyleSupport, editorSettings } = useSelect(
+		( select ) => ( {
+			hasThemeStyleSupport:
+				select( editPostStore ).isFeatureActive( 'themeStyles' ),
+			editorSettings: select( editorStore ).getEditorSettings(),
+		} ),
+		[]
+	);
+
+	// Compute the default styles.
+	return useMemo( () => {
+		const presetStyles =
+			editorSettings.styles?.filter(
+				( style ) =>
+					style.__unstableType && style.__unstableType !== 'theme'
+			) ?? [];
+
+		const defaultEditorStyles = [
+			...editorSettings.defaultEditorStyles,
+			...presetStyles,
+		];
+
+		// Has theme styles if the theme supports them and if some styles were not preset styles (in which case they're theme styles).
+		const hasThemeStyles =
+			hasThemeStyleSupport &&
+			presetStyles.length !== ( editorSettings.styles?.length ?? 0 );
+
+		// If theme styles are not present or displayed, ensure that
+		// base layout styles are still present in the editor.
+		if ( ! editorSettings.disableLayoutStyles && ! hasThemeStyles ) {
+			defaultEditorStyles.push( {
+				css: getLayoutStyles( {
+					style: {},
+					selector: 'body',
+					hasBlockGapSupport: false,
+					hasFallbackGapSupport: true,
+					fallbackGapValue: '0.5em',
+				} ),
+			} );
+		}
+
+		return hasThemeStyles ? editorSettings.styles : defaultEditorStyles;
+	}, [
+		editorSettings.defaultEditorStyles,
+		editorSettings.disableLayoutStyles,
+		editorSettings.styles,
+		hasThemeStyleSupport,
+	] );
+}
+
 function Layout() {
 	const isMobileViewport = useViewportMatch( 'medium', '<' );
 	const isHugeViewport = useViewportMatch( 'huge', '>=' );
@@ -94,45 +145,10 @@ function Layout() {
 		showBlockBreadcrumbs,
 		isTemplateMode,
 		documentLabel,
-		styles,
 	} = useSelect( ( select ) => {
 		const { getEditorSettings, getPostTypeLabel } = select( editorStore );
-		const { isFeatureActive } = select( editPostStore );
 		const editorSettings = getEditorSettings();
 		const postTypeLabel = getPostTypeLabel();
-		const hasThemeStyles = isFeatureActive( 'themeStyles' );
-
-		const themeStyles = [];
-		const presetStyles = [];
-		editorSettings.styles?.forEach( ( style ) => {
-			if ( ! style.__unstableType || style.__unstableType === 'theme' ) {
-				themeStyles.push( style );
-			} else {
-				presetStyles.push( style );
-			}
-		} );
-
-		const defaultEditorStyles = [
-			...editorSettings.defaultEditorStyles,
-			...presetStyles,
-		];
-
-		// If theme styles are not present or displayed, ensure that
-		// base layout styles are still present in the editor.
-		if (
-			! editorSettings.disableLayoutStyles &&
-			! ( hasThemeStyles && themeStyles.length )
-		) {
-			defaultEditorStyles.push( {
-				css: getLayoutStyles( {
-					style: {},
-					selector: 'body',
-					hasBlockGapSupport: false,
-					hasFallbackGapSupport: true,
-					fallbackGapValue: '0.5em',
-				} ),
-			} );
-		}
 
 		return {
 			isTemplateMode: select( editPostStore ).isEditingTemplate(),
@@ -165,13 +181,11 @@ function Layout() {
 			),
 			// translators: Default label for the Document in the Block Breadcrumb.
 			documentLabel: postTypeLabel || _x( 'Document', 'noun' ),
-			styles:
-				hasThemeStyles && themeStyles.length
-					? editorSettings.styles
-					: defaultEditorStyles,
 		};
 	}, [] );
 
+	const styles = useEditorStyles();
+
 	const openSidebarPanel = () =>
 		openGeneralSidebar(
 			hasBlockSelected ? 'edit-post/block' : 'edit-post/document'

test/e2e/specs/editor/various/footnotes.spec.js

@@ -291,7 +291,8 @@
 		await editor.clickBlockToolbarButton( 'More' );
 		await page.locator( 'button:text("Footnote")' ).click();
 
-		await page.keyboard.type( 'first footnote' );
+		// Check if content is correctly slashed on save and restore.
+		await page.keyboard.type( 'first footnote"' );
 
 		const id1 = await editor.canvas.evaluate( () => {
 			return document.activeElement.id;
@@ -316,7 +317,7 @@
 				id: id2,
 			},
 			{
-				content: 'first footnote',
+				content: 'first footnote"',
 				id: id1,
 			},
 		] );
@@ -329,7 +330,7 @@
 		// This also saves the post!
 		expect( await getFootnotes( page ) ).toMatchObject( [
 			{
-				content: 'first footnote',
+				content: 'first footnote"',
 				id: id1,
 			},
 			{
@@ -338,12 +339,22 @@
 			},
 		] );
 
+		const editorPage = page;
+		const previewPage = await editor.openPreviewPage();
+
+		await expect(
+			previewPage.locator( 'ol.wp-block-footnotes' )
+		).toHaveText( 'first footnote” ↩︎second footnote ↩︎' );
+
+		await previewPage.close();
+		await editorPage.bringToFront();
+
 		// Open revisions.
 		await editor.openDocumentSettingsSidebar();
 		await page
 			.getByRole( 'region', { name: 'Editor settings' } )
 			.getByRole( 'button', { name: 'Post' } )
 			.click();
 		await page.locator( 'a:text("2 Revisions")' ).click();
 		await page.locator( '.revisions-controls .ui-slider-handle' ).focus();
 		await page.keyboard.press( 'ArrowLeft' );
@@ -355,10 +366,19 @@
 				id: id2,
 			},
 			{
-				content: 'first footnote',
+				content: 'first footnote"',
 				id: id1,
 			},
 		] );
+
+		const previewPage2 = await editor.openPreviewPage();
+
+		await expect(
+			previewPage2.locator( 'ol.wp-block-footnotes' )
+		).toHaveText( 'second footnote ↩︎first footnote” ↩︎' );
+
+		await previewPage2.close();
+		await editorPage.bringToFront();
 	} );
 
 	test( 'can be previewed when published', async ( { editor, page } ) => {
@@ -392,12 +412,14 @@
 		// path).
 		await editor.canvas.click( 'ol.wp-block-footnotes li span' );
 		await page.keyboard.press( 'End' );
-		await page.keyboard.type( '3' );
+		// Test slashing.
+		await page.keyboard.type( '3"' );
 
 		const previewPage2 = await editor.openPreviewPage();
 
+		// Note: quote will get curled by wptexturize.
 		await expect(
 			previewPage2.locator( 'ol.wp-block-footnotes li' )
-		).toHaveText( '123  ↩︎' );
+		).toHaveText( '123″  ↩︎' );
 	} );
 } );