Blocks: Reimplement shared block as embedded editor

- Publish shared blocks when creating and editing them
- Fix exception when converting a shared block to static
- Fix 'Convert to Regular Block' button
- Remove the block when deleting a shared block

core-blocks/block/selection.js

@@ -0,0 +1,43 @@
+/**
+ * WordPress dependencies
+ */
+import { Component } from '@wordpress/element';
+import { withSelect, withDispatch } from '@wordpress/data';
+import { compose } from '@wordpress/compose';
+
+class SharedBlockSelection extends Component {
+	componentDidUpdate( prevProps ) {
+		const {
+			isSharedBlockSelected,
+			hasSelection,
+			clearSelectedBlock,
+			onBlockSelection,
+		} = this.props;
+
+		if ( ! isSharedBlockSelected && prevProps.isSharedBlockSelected ) {
+			clearSelectedBlock();
+		}
+
+		if ( hasSelection && ! prevProps.hasSelection ) {
+			onBlockSelection();
+		}
+	}
+
+	render() {
+		return this.props.children;
+	}
+}
+
+export default compose( [
+	withSelect( ( select ) => {
+		const { getBlockSelectionStart } = select( 'core/editor' );
+
+		return {
+			hasSelection: !! getBlockSelectionStart(),
+		};
+	} ),
+	withDispatch( ( dispatch ) => {
+		const { clearSelectedBlock } = dispatch( 'core/editor' );
+		return { clearSelectedBlock };
+	} ),
+] )( SharedBlockSelection );

lib/load.php

@@ -12,7 +12,6 @@
 // These files only need to be loaded if within a rest server instance
 // which this class will exist if that is the case.
 if ( class_exists( 'WP_REST_Controller' ) ) {
-	require dirname( __FILE__ ) . '/class-wp-rest-blocks-controller.php';
 	require dirname( __FILE__ ) . '/class-wp-rest-autosaves-controller.php';
 	require dirname( __FILE__ ) . '/class-wp-rest-block-renderer-controller.php';
 	require dirname( __FILE__ ) . '/class-wp-rest-search-controller.php';

lib/register.php

@@ -461,21 +461,20 @@ function gutenberg_register_post_types() {
 	register_post_type(
 		'wp_block',
 		array(
-			'labels'                => array(
+			'labels'          => array(
 				'name'          => 'Blocks',
 				'singular_name' => 'Block',
 			),
-			'public'                => false,
-			'rewrite'               => false,
-			'show_in_rest'          => true,
-			'rest_base'             => 'blocks',
-			'rest_controller_class' => 'WP_REST_Blocks_Controller',
-			'capability_type'       => 'block',
+			'public'          => false,
+			'rewrite'         => false,
+			'show_in_rest'    => true,
+			'rest_base'       => 'blocks',
+			'capability_type' => 'block',
 			'capabilities'          => array(
 				'read'         => 'read_blocks',
 				'create_posts' => 'create_blocks',
 			),
-			'map_meta_cap'          => true,
+			'map_meta_cap'    => true,
 		)
 	);
 

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

@@ -1,11 +1,17 @@
+/**
+ * External dependencies
+ */
+import { over, compact } from 'lodash';
+
 /**
  * WordPress dependencies
  */
 import { Button } from '@wordpress/components';
 import { Component, Fragment, createRef } from '@wordpress/element';
 import { __ } from '@wordpress/i18n';
 import { ESCAPE } from '@wordpress/keycodes';
-import { withInstanceId } from '@wordpress/compose';
+import { withSelect, withDispatch } from '@wordpress/data';
+import { withInstanceId, compose } from '@wordpress/compose';
 
 class ReusableBlockEditPanel extends Component {
 	constructor() {
@@ -115,4 +121,33 @@ class ReusableBlockEditPanel extends Component {
 	}
 }
 
-export default withInstanceId( ReusableBlockEditPanel );
+export default compose( [
+	withInstanceId,
+	withSelect( ( select ) => {
+		const { getEditedPostAttribute } = select( 'core/editor' );
+
+		return {
+			title: getEditedPostAttribute( 'title' ),
+		};
+	} ),
+	withDispatch( ( dispatch, ownProps ) => {
+		const {
+			editPost,
+			undoAll,
+			savePost,
+			clearSelectedBlock,
+		} = dispatch( 'core/editor' );
+
+		const withClearAndFinish = ( fn ) => over( compact( [
+			clearSelectedBlock,
+			ownProps.onFinishedEditing,
+			fn,
+		] ) );
+
+		return {
+			onChangeTitle: ( title ) => editPost( { title } ),
+			onSave: withClearAndFinish( savePost ),
+			onCancel: withClearAndFinish( undoAll ),
+		};
+	} ),
+] )( ReusableBlockEditPanel );