Block Library: Add new post-content block and use it in the default p…

…ost template.

lib/templates.php

@@ -12,6 +12,7 @@ function gutenberg_register_templates() {
 	$post_post_type_object                = get_post_type_object( 'post' );
 	$post_post_type_object->template      = array(
 		array( 'core/post-title' ),
+		array( 'core/post-content', array(), array( array( 'core/paragraph' ) ) ),
 	);
 	$post_post_type_object->template_lock = 'insert';
 }

packages/block-library/src/index.js

@@ -64,6 +64,7 @@ import * as classic from './classic';
 
 // Top-level template blocks.
 import * as postTitle from './post-title';
+import * as postContent from './post-content';
 
 /**
  * Function to register core blocks provided by the block editor.
@@ -130,6 +131,7 @@ export const registerCoreBlocks = () => {
 
 		// Register top-level template blocks.
 		postTitle,
+		postContent,
 	].forEach( ( block ) => {
 		if ( ! block ) {
 			return;

packages/block-library/src/post-content/block.json

@@ -0,0 +1,4 @@
+{
+	"name": "core/post-content",
+	"category": "common"
+}

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

@@ -0,0 +1,8 @@
+/**
+ * WordPress dependencies
+ */
+import { InnerBlocks } from '@wordpress/block-editor';
+
+export default function PostContentEdit() {
+	return <InnerBlocks templateLock={ false } />;
+}

packages/block-library/src/post-content/index.js

@@ -0,0 +1,19 @@
+/**
+ * WordPress dependencies
+ */
+import { __ } from '@wordpress/i18n';
+
+/**
+ * Internal dependencies
+ */
+import metadata from './block.json';
+import edit from './edit';
+
+const { name } = metadata;
+
+export { metadata, name };
+
+export const settings = {
+	title: __( 'Post Content' ),
+	edit,
+};