Quick Edit: add Template field

packages/base-styles/_z-index.scss

@@ -132,6 +132,7 @@ $z-layers: (
 	".editor-action-modal": 1000001,
 	".editor-post-template__swap-template-modal": 1000001,
 	".edit-site-template-panel__replace-template-modal": 1000001,
+	".fields-controls__template-modal": 1000001,
 
 	// Note: The ConfirmDialog component's z-index is being set to 1000001 in packages/components/src/confirm-dialog/styles.ts
 	// because it uses emotion and not sass. We need it to render on top its parent popover.

packages/edit-site/src/components/post-edit/index.js

@@ -19,6 +19,8 @@ import { privateApis as editorPrivateApis } from '@wordpress/editor';
  */
 import Page from '../page';
 import { unlock } from '../../lock-unlock';
+import usePatternSettings from '../page-patterns/use-pattern-settings';
+import { privateApis as blockEditorPrivateApis } from '@wordpress/block-editor';
 
 const { PostCardPanel, usePostFields } = unlock( editorPrivateApis );
 
@@ -85,6 +87,12 @@ function PostEditForm( { postType, postId } ) {
 				'slug',
 				'parent',
 				'comment_status',
+				{
+					label: __( 'Template' ),
+					labelPosition: 'side',
+					id: 'template',
+					layout: 'regular',
+				},
 			].filter(
 				( field ) =>
 					ids.length === 1 ||
@@ -123,14 +131,40 @@ function PostEditForm( { postType, postId } ) {
 		setMultiEdits( {} );
 	}, [ ids ] );
 
+	const { ExperimentalBlockEditorProvider } = unlock(
+		blockEditorPrivateApis
+	);
+	const settings = usePatternSettings();
+
+	/**
+	 * The template field depends on the block editor settings.
+	 * This is a workaround to ensure that the block editor settings are available.
+	 * For more information, see: https://github.com/WordPress/gutenberg/issues/67521
+	 */
+	const fieldsWithDependency = useMemo( () => {
+		return fields.map( ( field ) => {
+			if ( field.id === 'template' ) {
+				return {
+					...field,
+					Edit: ( data ) => (
+						<ExperimentalBlockEditorProvider settings={ settings }>
+							<field.Edit { ...data } />
+						</ExperimentalBlockEditorProvider>
+					),
+				};
+			}
+			return field;
+		} );
+	}, [ fields, settings ] );
+
 	return (
 		<VStack spacing={ 4 }>
 			{ ids.length === 1 && (
 				<PostCardPanel postType={ postType } postId={ ids[ 0 ] } />
 			) }
 			<DataForm
 				data={ ids.length === 1 ? record : multiEdits }
-				fields={ fields }
+				fields={ fieldsWithDependency }
 				form={ form }
 				onChange={ onChange }
 			/>

packages/editor/src/dataviews/store/private-actions.ts

@@ -33,6 +33,7 @@ import {
 	statusField,
 	authorField,
 	titleField,
+	templateField,
 } from '@wordpress/fields';
 import duplicateTemplatePart from '../actions/duplicate-template-part';
 
@@ -171,6 +172,7 @@ export const registerPostTypeSchema =
 			postTypeConfig.supports?.[ 'page-attributes' ] && parentField,
 			postTypeConfig.supports?.comments && commentStatusField,
 			passwordField,
+			templateField,
 		].filter( Boolean );
 
 		registry.batch( () => {

packages/fields/README.md

@@ -98,6 +98,10 @@ Undocumented declaration.
 
 Status field for BasePost.
 
+### templateField
+
+Undocumented declaration.
+
 ### titleField
 
 Undocumented declaration.

packages/fields/package.json

@@ -35,6 +35,7 @@
 		"@babel/runtime": "7.25.7",
 		"@wordpress/api-fetch": "*",
 		"@wordpress/blob": "*",
+		"@wordpress/block-editor": "*",
 		"@wordpress/blocks": "*",
 		"@wordpress/components": "*",
 		"@wordpress/compose": "*",

packages/fields/src/actions/utils.ts

@@ -30,7 +30,9 @@ export function isTemplateOrTemplatePart(
 	return p.type === TEMPLATE_POST_TYPE || p.type === TEMPLATE_PART_POST_TYPE;
 }
 
-export function getItemTitle( item: Post ): string {
+export function getItemTitle( item: {
+	title: string | { rendered: string } | { raw: string };
+} ) {
 	if ( typeof item.title === 'string' ) {
 		return decodeEntities( item.title );
 	}

packages/fields/src/fields/index.ts

@@ -2,6 +2,7 @@ export { default as slugField } from './slug';
 export { default as titleField } from './title';
 export { default as orderField } from './order';
 export { default as featuredImageField } from './featured-image';
+export { default as templateField } from './template';
 export { default as parentField } from './parent';
 export { default as passwordField } from './password';
 export { default as statusField } from './status';

packages/fields/src/fields/template/index.ts

@@ -0,0 +1,22 @@
+/**
+ * WordPress dependencies
+ */
+import type { Field } from '@wordpress/dataviews';
+
+/**
+ * Internal dependencies
+ */
+import { __ } from '@wordpress/i18n';
+import type { BasePost } from '../../types';
+import { TemplateEdit } from './template-edit';
+
+const templateField: Field< BasePost > = {
+	id: 'template',
+	type: 'text',
+	label: __( 'Template' ),
+	getValue: ( { item } ) => item.template,
+	Edit: TemplateEdit,
+	enableSorting: false,
+};
+
+export default templateField;

packages/fields/src/fields/template/style.scss

@@ -0,0 +1,23 @@
+.fields-controls__template-modal {
+	z-index: z-index(".fields-controls__template-modal");
+}
+
+.fields-controls__template-content .block-editor-block-patterns-list {
+	column-count: 2;
+	column-gap: $grid-unit-30;
+
+	// Small top padding required to avoid cutting off the visible outline when hovering items
+	padding-top: $border-width-focus-fallback;
+
+	@include break-medium() {
+		column-count: 3;
+	}
+
+	@include break-wide() {
+		column-count: 4;
+	}
+
+	.block-editor-block-patterns-list__list-item {
+		break-inside: avoid-column;
+	}
+}

packages/fields/src/fields/template/template-edit.tsx

@@ -0,0 +1,210 @@
+/**
+ * WordPress dependencies
+ */
+import { useCallback, useMemo, useState } from '@wordpress/element';
+// @ts-ignore
+import { parse } from '@wordpress/blocks';
+import type { WpTemplate } from '@wordpress/core-data';
+import { store as coreStore } from '@wordpress/core-data';
+import type { DataFormControlProps } from '@wordpress/dataviews';
+
+/**
+ * Internal dependencies
+ */
+// @ts-expect-error block-editor is not typed correctly.
+import { __experimentalBlockPatternsList as BlockPatternsList } from '@wordpress/block-editor';
+import {
+	Button,
+	Dropdown,
+	MenuGroup,
+	MenuItem,
+	Modal,
+} from '@wordpress/components';
+import { useAsyncList } from '@wordpress/compose';
+import { useSelect } from '@wordpress/data';
+import { decodeEntities } from '@wordpress/html-entities';
+import { __ } from '@wordpress/i18n';
+import { getItemTitle } from '../../actions/utils';
+import type { BasePost } from '../../types';
+import { unlock } from '../../lock-unlock';
+
+export const TemplateEdit = ( {
+	data,
+	field,
+	onChange,
+}: DataFormControlProps< BasePost > ) => {
+	const { id } = field;
+	const postType = data.type;
+	const postId =
+		typeof data.id === 'number' ? data.id : parseInt( data.id, 10 );
+	const slug = data.slug;
+
+	const { availableTemplates, templates } = useSelect(
+		( select ) => {
+			const allTemplates =
+				select( coreStore ).getEntityRecords< WpTemplate >(
+					'postType',
+					'wp_template',
+					{
+						per_page: -1,
+						post_type: postType,
+					}
+				) ?? [];
+
+			const { getHomePage, getPostsPageId } = unlock(
+				select( coreStore )
+			);
+
+			const isPostsPage = getPostsPageId() === +postId;
+			const isFrontPage =
+				postType === 'page' && getHomePage()?.postId === +postId;
+
+			const allowSwitchingTemplate = ! isPostsPage && ! isFrontPage;
+
+			return {
+				templates: allTemplates,
+				availableTemplates: allowSwitchingTemplate
+					? allTemplates.filter(
+							( template ) =>
+								template.is_custom &&
+								template.slug !== data.template &&
+								!! template.content.raw // Skip empty templates.
+					  )
+					: [],
+			};
+		},
+		[ data.template, postId, postType ]
+	);
+
+	const templatesAsPatterns = useMemo(
+		() =>
+			availableTemplates.map( ( template ) => ( {
+				name: template.slug,
+				blocks: parse( template.content.raw ),
+				title: decodeEntities( template.title.rendered ),
+				id: template.id,
+			} ) ),
+		[ availableTemplates ]
+	);
+
+	const shownTemplates = useAsyncList( templatesAsPatterns );
+
+	const value = field.getValue( { item: data } );
+
+	const currentTemplate = useSelect(
+		( select ) => {
+			const foundTemplate = templates?.find(
+				( template ) => template.slug === value
+			);
+
+			if ( foundTemplate ) {
+				return foundTemplate;
+			}
+
+			let slugToCheck;
+			// In `draft` status we might not have a slug available, so we use the `single`
+			// post type templates slug(ex page, single-post, single-product etc..).
+			// Pages do not need the `single` prefix in the slug to be prioritized
+			// through template hierarchy.
+			if ( slug ) {
+				slugToCheck =
+					postType === 'page'
+						? `${ postType }-${ slug }`
+						: `single-${ postType }-${ slug }`;
+			} else {
+				slugToCheck =
+					postType === 'page' ? 'page' : `single-${ postType }`;
+			}
+
+			if ( postType ) {
+				const templateId = select( coreStore ).getDefaultTemplateId( {
+					slug: slugToCheck,
+				} );
+
+				return select( coreStore ).getEntityRecord(
+					'postType',
+					'wp_template',
+					templateId
+				);
+			}
+		},
+		[ postType, slug, templates, value ]
+	);
+
+	const [ showModal, setShowModal ] = useState( false );
+
+	const onChangeControl = useCallback(
+		( newValue: string ) =>
+			onChange( {
+				[ id ]: newValue,
+			} ),
+		[ id, onChange ]
+	);
+
+	return (
+		<fieldset className="fields-controls__template">
+			<Dropdown
+				popoverProps={ { placement: 'bottom-start' } }
+				renderToggle={ ( { onToggle } ) => (
+					<Button
+						__next40pxDefaultSize
+						variant="tertiary"
+						size="compact"
+						onClick={ onToggle }
+					>
+						{ currentTemplate
+							? getItemTitle( currentTemplate )
+							: '' }
+					</Button>
+				) }
+				renderContent={ ( { onToggle } ) => (
+					<MenuGroup>
+						<MenuItem
+							onClick={ () => {
+								setShowModal( true );
+								onToggle();
+							} }
+						>
+							{ __( 'Swap template' ) }
+						</MenuItem>
+						{
+							// The default template in a post is indicated by an empty string
+							value !== '' && (
+								<MenuItem
+									onClick={ () => {
+										onChangeControl( '' );
+										onToggle();
+									} }
+								>
+									{ __( 'Use default template' ) }
+								</MenuItem>
+							)
+						}
+					</MenuGroup>
+				) }
+			/>
+			{ showModal && (
+				<Modal
+					title={ __( 'Choose a template' ) }
+					onRequestClose={ () => setShowModal( false ) }
+					overlayClassName="fields-controls__template-modal"
+					isFullScreen
+				>
+					<div className="fields-controls__template-content">
+						<BlockPatternsList
+							label={ __( 'Templates' ) }
+							blockPatterns={ templatesAsPatterns }
+							shownPatterns={ shownTemplates }
+							onClickPattern={ (
+								template: ( typeof templatesAsPatterns )[ 0 ]
+							) => {
+								onChangeControl( template.name );
+								setShowModal( false );
+							} }
+						/>
+					</div>
+				</Modal>
+			) }
+		</fieldset>
+	);
+};

packages/fields/src/style.scss

@@ -1,2 +1,3 @@
 @import "./fields/slug/style.scss";
 @import "./fields/featured-image/style.scss";
+@import "./fields/template/style.scss";