Add content schema to pattern editing view (WordPress#59977)

* Add new quick navigation component for pattern schema

* Implement panel and fix minor issues

* Rename to pattern content, and avoid showing panel when there are no blocks

* Don't try to unlock what's already unlocked, just turn the handle.

* Rename content panel title from 'Content' to 'Overrides'

* Rename component to `OverridesPanel`

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

@@ -38,7 +38,7 @@ import { name as patternBlockName } from './index';
 import { unlock } from '../lock-unlock';
 
 const { useLayoutClasses } = unlock( blockEditorPrivateApis );
-const { PARTIAL_SYNCING_SUPPORTED_BLOCKS } = unlock( patternsPrivateApis );
+const { isOverridableBlock } = unlock( patternsPrivateApis );
 
 const fullAlignments = [ 'full', 'wide', 'left', 'right' ];
 
@@ -90,21 +90,9 @@ const useInferredLayout = ( blocks, parentLayout ) => {
 	}, [ blocks, parentLayout ] );
 };
 
-function hasOverridableAttributes( block ) {
-	return (
-		Object.keys( PARTIAL_SYNCING_SUPPORTED_BLOCKS ).includes(
-			block.name
-		) &&
-		!! block.attributes.metadata?.bindings &&
-		Object.values( block.attributes.metadata.bindings ).some(
-			( binding ) => binding.source === 'core/pattern-overrides'
-		)
-	);
-}
-
 function hasOverridableBlocks( blocks ) {
 	return blocks.some( ( block ) => {
-		if ( hasOverridableAttributes( block ) ) return true;
+		if ( isOverridableBlock( block ) ) return true;
 		return hasOverridableBlocks( block.innerBlocks );
 	} );
 }
@@ -133,7 +121,7 @@ function applyInitialContentValuesToInnerBlocks(
 		const metadataName =
 			legacyIdMap?.[ block.clientId ] ?? block.attributes.metadata?.name;
 
-		if ( ! metadataName || ! hasOverridableAttributes( block ) ) {
+		if ( ! metadataName || ! isOverridableBlock( block ) ) {
 			return { ...block, innerBlocks };
 		}
 
@@ -184,7 +172,7 @@ function getContentValuesFromInnerBlocks( blocks, defaultValues, legacyIdMap ) {
 		}
 		const metadataName =
 			legacyIdMap?.[ block.clientId ] ?? block.attributes.metadata?.name;
-		if ( ! metadataName || ! hasOverridableAttributes( block ) ) {
+		if ( ! metadataName || ! isOverridableBlock( block ) ) {
 			continue;
 		}
 
@@ -217,7 +205,7 @@ function setBlockEditMode( setEditMode, blocks, mode ) {
 	blocks.forEach( ( block ) => {
 		const editMode =
 			mode ||
-			( hasOverridableAttributes( block ) ? 'contentOnly' : 'disabled' );
+			( isOverridableBlock( block ) ? 'contentOnly' : 'disabled' );
 		setEditMode( block.clientId, editMode );
 
 		setBlockEditMode(

packages/edit-post/src/components/sidebar/settings-sidebar/index.js

@@ -43,6 +43,7 @@ import { unlock } from '../../../lock-unlock';
 const { PostCardPanel } = unlock( editorPrivateApis );
 
 const { Tabs } = unlock( componentsPrivateApis );
+const { PatternOverridesPanel } = unlock( editorPrivateApis );
 
 const SIDEBAR_ACTIVE_BY_DEFAULT = Platform.select( {
 	web: true,
@@ -123,6 +124,7 @@ const SidebarContent = ( {
 							<PostExcerptPanel />
 							<PostDiscussionPanel />
 							<PageAttributesPanel />
+							<PatternOverridesPanel />
 							<MetaBoxes location="side" />
 						</>
 					) }

packages/edit-site/src/components/sidebar-edit-mode/template-panel/index.js

@@ -9,8 +9,8 @@ import {
 	PostExcerptPanel,
 	PostLastRevisionPanel,
 	PostTaxonomiesPanel,
-	store as editorStore,
 	privateApis as editorPrivateApis,
+	store as editorStore,
 } from '@wordpress/editor';
 import { store as coreStore } from '@wordpress/core-data';
 import { __ } from '@wordpress/i18n';
@@ -31,7 +31,7 @@ import { TEMPLATE_PART_POST_TYPE } from '../../../utils/constants';
 import { unlock } from '../../../lock-unlock';
 
 const { PostCardPanel } = unlock( editorPrivateApis );
-
+const { PatternOverridesPanel } = unlock( editorPrivateApis );
 const { useHistory } = unlock( routerPrivateApis );
 
 function TemplatesList( { availableTemplates, onSelect } ) {
@@ -141,6 +141,7 @@ export default function TemplatePanel() {
 			<PostExcerptPanel />
 			<PostDiscussionPanel />
 			<PageAttributesPanel />
+			<PatternOverridesPanel />
 		</>
 	);
 }

packages/editor/src/components/pattern-overrides-panel/index.js

@@ -0,0 +1,26 @@
+/**
+ * WordPress dependencies
+ */
+import { useSelect } from '@wordpress/data';
+import { privateApis as patternsPrivateApis } from '@wordpress/patterns';
+
+/**
+ * Internal dependencies
+ */
+import { store as editorStore } from '../../store';
+import { unlock } from '../../lock-unlock';
+
+const { OverridesPanel } = unlock( patternsPrivateApis );
+
+export default function PatternOverridesPanel() {
+	const supportsPatternOverridesPanel = useSelect(
+		( select ) => select( editorStore ).getCurrentPostType() === 'wp_block',
+		[]
+	);
+
+	if ( ! supportsPatternOverridesPanel ) {
+		return null;
+	}
+
+	return <OverridesPanel />;
+}

packages/editor/src/private-apis.js

@@ -10,6 +10,7 @@ import DocumentTools from './components/document-tools';
 import InserterSidebar from './components/inserter-sidebar';
 import ListViewSidebar from './components/list-view-sidebar';
 import ModeSwitcher from './components/mode-switcher';
+import PatternOverridesPanel from './components/pattern-overrides-panel';
 import PluginPostExcerpt from './components/post-excerpt/plugin';
 import PostPanelRow from './components/post-panel-row';
 import PostViewLink from './components/post-view-link';
@@ -27,6 +28,7 @@ lock( privateApis, {
 	InserterSidebar,
 	ListViewSidebar,
 	ModeSwitcher,
+	PatternOverridesPanel,
 	PluginPostExcerpt,
 	PostPanelRow,
 	PostViewLink,

packages/patterns/src/api/index.js

@@ -0,0 +1,23 @@
+/**
+ * Internal dependencies
+ */
+import { PARTIAL_SYNCING_SUPPORTED_BLOCKS } from '../constants';
+
+/**
+ * Determines whether a block is overridable.
+ *
+ * @param {WPBlock} block The block to test.
+ *
+ * @return {boolean} `true` if a block is overridable, `false` otherwise.
+ */
+export function isOverridableBlock( block ) {
+	return (
+		Object.keys( PARTIAL_SYNCING_SUPPORTED_BLOCKS ).includes(
+			block.name
+		) &&
+		!! block.attributes.metadata?.bindings &&
+		Object.values( block.attributes.metadata.bindings ).some(
+			( binding ) => binding.source === 'core/pattern-overrides'
+		)
+	);
+}

packages/patterns/src/components/overrides-panel.js

@@ -0,0 +1,45 @@
+/**
+ * WordPress dependencies
+ */
+import {
+	privateApis as blockEditorPrivateApis,
+	store as blockEditorStore,
+} from '@wordpress/block-editor';
+import { PanelBody } from '@wordpress/components';
+import { useSelect } from '@wordpress/data';
+import { useMemo } from '@wordpress/element';
+import { __ } from '@wordpress/i18n';
+
+/**
+ * Internal dependencies
+ */
+import { isOverridableBlock } from '../api';
+import { unlock } from '../lock-unlock';
+
+const { BlockQuickNavigation } = unlock( blockEditorPrivateApis );
+
+export default function OverridesPanel() {
+	const allClientIds = useSelect(
+		( select ) => select( blockEditorStore ).getClientIdsWithDescendants(),
+		[]
+	);
+	const { getBlock } = useSelect( blockEditorStore );
+	const clientIdsWithOverrides = useMemo(
+		() =>
+			allClientIds.filter( ( clientId ) => {
+				const block = getBlock( clientId );
+				return isOverridableBlock( block );
+			} ),
+		[ allClientIds, getBlock ]
+	);
+
+	if ( ! clientIdsWithOverrides?.length ) {
+		return null;
+	}
+
+	return (
+		<PanelBody title={ __( 'Overrides' ) }>
+			<BlockQuickNavigation clientIds={ clientIdsWithOverrides } />
+		</PanelBody>
+	);
+}

packages/patterns/src/private-apis.js

@@ -2,6 +2,7 @@
  * Internal dependencies
  */
 import { lock } from './lock-unlock';
+import OverridesPanel from './components/overrides-panel';
 import {
 	default as CreatePatternModal,
 	CreatePatternModalContents,
@@ -10,6 +11,7 @@ import {
 	default as DuplicatePatternModal,
 	useDuplicatePatternProps,
 } from './components/duplicate-pattern-modal';
+import { isOverridableBlock } from './api';
 import RenamePatternModal from './components/rename-pattern-modal';
 import PatternsMenuItems from './components';
 import RenamePatternCategoryModal from './components/rename-pattern-category-modal';
@@ -27,9 +29,11 @@ import {
 
 export const privateApis = {};
 lock( privateApis, {
+	OverridesPanel,
 	CreatePatternModal,
 	CreatePatternModalContents,
 	DuplicatePatternModal,
+	isOverridableBlock,
 	useDuplicatePatternProps,
 	RenamePatternModal,
 	PatternsMenuItems,