ContentOnly: Add support for block styles on top-level contentOnly lo…

…cked blocks (WordPress#64872)

Co-authored-by: ntsekouras <ntsekouras@git.wordpress.org>
Co-authored-by: richtabor <richtabor@git.wordpress.org>
Co-authored-by: Mamaduka <mamaduka@git.wordpress.org>

packages/block-editor/src/components/block-inspector/index.js

@@ -32,6 +32,14 @@ import { useBorderPanelLabel } from '../../hooks/border';
 
 import { unlock } from '../../lock-unlock';
 
+function BlockStylesPanel( { clientId } ) {
+	return (
+		<PanelBody title={ __( 'Styles' ) }>
+			<BlockStyles clientId={ clientId } />
+		</PanelBody>
+	);
+}
+
 function BlockInspectorLockedBlocks( { topLevelLockedBlock } ) {
 	const contentClientIds = useSelect(
 		( select ) => {
@@ -48,6 +56,15 @@ function BlockInspectorLockedBlocks( { topLevelLockedBlock } ) {
 		},
 		[ topLevelLockedBlock ]
 	);
+	const hasBlockStyles = useSelect(
+		( select ) => {
+			const { getBlockName } = select( blockEditorStore );
+			const { getBlockStyles } = select( blocksStore );
+			return !! getBlockStyles( getBlockName( topLevelLockedBlock ) )
+				?.length;
+		},
+		[ topLevelLockedBlock ]
+	);
 	const blockInformation = useBlockDisplayInformation( topLevelLockedBlock );
 	return (
 		<div className="block-editor-block-inspector">
@@ -57,6 +74,9 @@ function BlockInspectorLockedBlocks( { topLevelLockedBlock } ) {
 			/>
 			<BlockVariationTransforms blockClientId={ topLevelLockedBlock } />
 			<BlockInfo.Slot />
+			{ hasBlockStyles && (
+				<BlockStylesPanel clientId={ topLevelLockedBlock } />
+			) }
 			{ contentClientIds.length > 0 && (
 				<PanelBody title={ __( 'Content' ) }>
 					<BlockQuickNavigation clientIds={ contentClientIds } />
@@ -81,7 +101,6 @@ const BlockInspector = ( { showNoBlockSelectedMessage = true } ) => {
 			getContentLockingParent,
 			getTemplateLock,
 		} = unlock( select( blockEditorStore ) );
-
 		const _selectedBlockClientId = getSelectedBlockClientId();
 		const _selectedBlockName =
 			_selectedBlockClientId && getBlockName( _selectedBlockClientId );
@@ -276,11 +295,7 @@ const BlockInspectorSingleBlock = ( { clientId, blockName } ) => {
 			{ ! showTabs && (
 				<>
 					{ hasBlockStyles && (
-						<div>
-							<PanelBody title={ __( 'Styles' ) }>
-								<BlockStyles clientId={ clientId } />
-							</PanelBody>
-						</div>
+						<BlockStylesPanel clientId={ clientId } />
 					) }
 					<InspectorControls.Slot />
 					<InspectorControls.Slot group="list" />