Block Bindings: Allow editing in post meta source

packages/block-editor/src/components/rich-text/index.js

@@ -11,6 +11,7 @@ import {
 	useCallback,
 	forwardRef,
 	createContext,
+	useContext,
 } from '@wordpress/element';
 import { useDispatch, useRegistry, useSelect } from '@wordpress/data';
 import { useMergeRefs, useInstanceId } from '@wordpress/compose';
@@ -39,6 +40,7 @@ import { Content, valueToHTMLString } from './content';
 import { withDeprecations } from './with-deprecations';
 import { unlock } from '../../lock-unlock';
 import { canBindBlock } from '../../hooks/use-bindings-attributes';
+import BlockContext from '../block-context';
 
 export const keyboardShortcutContext = createContext();
 export const inputEventContext = createContext();
@@ -121,6 +123,7 @@ export function RichTextWrapper(
 	const context = useBlockEditContext();
 	const { clientId, isSelected: isBlockSelected, name: blockName } = context;
 	const blockBindings = context[ blockBindingsKey ];
+	const blockContext = useContext( BlockContext );
 	const selector = ( select ) => {
 		// Avoid subscribing to the block editor store if the block is not
 		// selected.
@@ -170,7 +173,7 @@ export function RichTextWrapper(
 				const { getBlockBindingsSource } = unlock(
 					select( blocksStore )
 				);
-				for ( const [ attribute, args ] of Object.entries(
+				for ( const [ attribute, binding ] of Object.entries(
 					blockBindings
 				) ) {
 					if (
@@ -180,13 +183,16 @@ export function RichTextWrapper(
 						break;
 					}
 
-					// If the source is not defined, or if its value of `lockAttributesEditing` is `true`, disable it.
+					// If the source is not defined, or if its value of `canUserEditValue` is `false`, disable it.
 					const blockBindingsSource = getBlockBindingsSource(
-						args.source
+						binding.source
 					);
 					if (
-						! blockBindingsSource ||
-						blockBindingsSource.lockAttributesEditing()
+						! blockBindingsSource?.canUserEditValue( {
+							select,
+							context: blockContext,
+							args: binding.args,
+						} )
 					) {
 						_disableBoundBlocks = true;
 						break;

packages/block-editor/src/store/actions.js

@@ -18,6 +18,7 @@ import {
 } from '@wordpress/blocks';
 import { speak } from '@wordpress/a11y';
 import { __, _n, sprintf } from '@wordpress/i18n';
+import { store as noticesStore } from '@wordpress/notices';
 import { create, insert, remove, toHTMLString } from '@wordpress/rich-text';
 import deprecated from '@wordpress/deprecated';
 
@@ -872,6 +873,30 @@ export const __unstableSplitSelection =
 			typeof selectionB.attributeKey === 'string'
 				? selectionB.attributeKey
 				: findRichTextAttributeKey( blockBType );
+		const blockAttributes = select.getBlockAttributes(
+			selectionA.clientId
+		);
+		const bindings = blockAttributes?.metadata?.bindings;
+
+		// If the attribute is bound, don't split the selection and insert a new block instead.
+		if ( bindings?.[ attributeKeyA ] ) {
+			// Show warning if user tries to insert a block into another block with bindings.
+			if ( blocks.length ) {
+				const { createWarningNotice } =
+					registry.dispatch( noticesStore );
+				createWarningNotice(
+					__(
+						"Blocks can't be inserted into other blocks with bindings"
+					),
+					{
+						type: 'snackbar',
+					}
+				);
+				return;
+			}
+			dispatch.insertAfterBlock( selectionA.clientId );
+			return;
+		}
 
 		// Can't split if the selection is not set.
 		if (
@@ -918,9 +943,7 @@ export const __unstableSplitSelection =
 						  );
 				}
 
-				const length = select.getBlockAttributes( selectionA.clientId )[
-					attributeKeyA
-				].length;
+				const length = blockAttributes[ attributeKeyA ].length;
 
 				if ( selectionA.offset === 0 && length ) {
 					dispatch.insertBlocks(

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

@@ -156,6 +156,7 @@ function ButtonEdit( props ) {
 		onReplace,
 		mergeBlocks,
 		clientId,
+		context,
 	} = props;
 	const {
 		tagName,
@@ -246,8 +247,11 @@ function ButtonEdit( props ) {
 			return {
 				lockUrlControls:
 					!! metadata?.bindings?.url &&
-					( ! blockBindingsSource ||
-						blockBindingsSource?.lockAttributesEditing() ),
+					! blockBindingsSource?.canUserEditValue( {
+						select,
+						context,
+						args: metadata?.bindings?.url?.args,
+					} ),
 			};
 		},
 		[ isSelected, metadata?.bindings?.url ]

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

@@ -317,8 +317,11 @@ export function ImageEdit( {
 			return {
 				lockUrlControls:
 					!! metadata?.bindings?.url &&
-					( ! blockBindingsSource ||
-						blockBindingsSource?.lockAttributesEditing() ),
+					! blockBindingsSource?.canUserEditValue( {
+						select,
+						context,
+						args: metadata?.bindings?.url?.args,
+					} ),
 				lockUrlControlsMessage: blockBindingsSource?.label
 					? sprintf(
 							/* translators: %s: Label of the bindings source. */

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

@@ -462,8 +462,11 @@ export default function Image( {
 			return {
 				lockUrlControls:
 					!! urlBinding &&
-					( ! urlBindingSource ||
-						urlBindingSource?.lockAttributesEditing() ),
+					! urlBindingSource?.canUserEditValue( {
+						select,
+						context,
+						args: urlBinding?.args,
+					} ),
 				lockHrefControls:
 					// Disable editing the link of the URL if the image is inside a pattern instance.
 					// This is a temporary solution until we support overriding the link on the frontend.
@@ -474,8 +477,11 @@ export default function Image( {
 					hasParentPattern,
 				lockAltControls:
 					!! altBinding &&
-					( ! altBindingSource ||
-						altBindingSource?.lockAttributesEditing() ),
+					! altBindingSource?.canUserEditValue( {
+						select,
+						context,
+						args: altBinding?.args,
+					} ),
 				lockAltControlsMessage: altBindingSource?.label
 					? sprintf(
 							/* translators: %s: Label of the bindings source. */
@@ -485,8 +491,11 @@ export default function Image( {
 					: __( 'Connected to dynamic data' ),
 				lockTitleControls:
 					!! titleBinding &&
-					( ! titleBindingSource ||
-						titleBindingSource?.lockAttributesEditing() ),
+					! titleBindingSource?.canUserEditValue( {
+						select,
+						context,
+						args: titleBinding?.args,
+					} ),
 				lockTitleControlsMessage: titleBindingSource?.label
 					? sprintf(
 							/* translators: %s: Label of the bindings source. */

packages/blocks/src/store/private-actions.js

@@ -55,6 +55,6 @@ export function registerBlockBindingsSource( source ) {
 		setValue: source.setValue,
 		setValues: source.setValues,
 		getPlaceholder: source.getPlaceholder,
-		lockAttributesEditing: source.lockAttributesEditing,
+		canUserEditValue: source.canUserEditValue,
 	};
 }

packages/blocks/src/store/reducer.js

@@ -381,10 +381,7 @@ export function blockBindingsSources( state = {}, action ) {
 				setValue: action.setValue,
 				setValues: action.setValues,
 				getPlaceholder: action.getPlaceholder,
-				lockAttributesEditing: () =>
-					action.lockAttributesEditing
-						? action.lockAttributesEditing()
-						: true,
+				canUserEditValue: action.canUserEditValue || ( () => false ),
 			},
 		};
 	}

packages/editor/src/bindings/pattern-overrides.js

@@ -89,7 +89,5 @@ export default {
 				},
 			} );
 	},
-	lockAttributesEditing() {
-		return false;
-	},
+	canUserEditValue: () => true,
 };

packages/editor/src/bindings/post-meta.js

@@ -16,13 +16,53 @@ export default {
 		return args.key;
 	},
 	getValue( { registry, context, args } ) {
-		const postType = context.postType
-			? context.postType
-			: registry.select( editorStore ).getCurrentPostType();
-
 		return registry
 			.select( coreDataStore )
-			.getEditedEntityRecord( 'postType', postType, context.postId )
-			.meta?.[ args.key ];
+			.getEditedEntityRecord(
+				'postType',
+				context?.postType,
+				context?.postId
+			).meta?.[ args.key ];
+	},
+	setValue( { registry, context, args, value } ) {
+		registry
+			.dispatch( coreDataStore )
+			.editEntityRecord( 'postType', context?.postType, context?.postId, {
+				meta: {
+					[ args.key ]: value,
+				},
+			} );
+	},
+	canUserEditValue( { select, context, args } ) {
+		const postType =
+			context?.postType || select( editorStore ).getCurrentPostType();
+
+		// Check that editing is happening in the post editor and not a template.
+		if ( postType === 'wp_template' ) {
+			return false;
+		}
+
+		// Check that the custom field is not protected and available in the REST API.
+		const isFieldExposed = !! select( coreDataStore ).getEntityRecord(
+			'postType',
+			postType,
+			context?.postId
+		)?.meta?.[ args.key ];
+
+		if ( ! isFieldExposed ) {
+			return false;
+		}
+
+		// Check that the user has the capability to edit post meta.
+		const canUserEdit = select( coreDataStore ).canUserEditEntityRecord(
+			'postType',
+			context?.postType,
+			context?.postId
+		);
+		if ( ! canUserEdit ) {
+			return false;
+		}
+
+		return true;
 	},
 };