@wordpress/block-editor/src/components/block-pattern-setup/index.js

Generic block editor.

/**
 * WordPress dependencies
 */
import { useDispatch } from '@wordpress/data';
import { cloneBlock } from '@wordpress/blocks';
import { Composite, VisuallyHidden } from '@wordpress/components';

import { useState } from '@wordpress/element';
import { useInstanceId } from '@wordpress/compose';
import { __ } from '@wordpress/i18n';

/**
 * Internal dependencies
 */
import { store as blockEditorStore } from '../../store';
import BlockPreview from '../block-preview';
import SetupToolbar from './setup-toolbar';
import usePatternsSetup from './use-patterns-setup';
import { VIEWMODES } from './constants';

const SetupContent = ( {
	viewMode,
	activeSlide,
	patterns,
	onBlockPatternSelect,
	showTitles,
} ) => {
	const containerClass = 'block-editor-block-pattern-setup__container';

	if ( viewMode === VIEWMODES.carousel ) {
		const slideClass = new Map( [
			[ activeSlide, 'active-slide' ],
			[ activeSlide - 1, 'previous-slide' ],
			[ activeSlide + 1, 'next-slide' ],
		] );
		return (
			<div className="block-editor-block-pattern-setup__carousel">
				<div className={ containerClass }>
					<div className="carousel-container">
						{ patterns.map( ( pattern, index ) => (
							<BlockPatternSlide
								active={ index === activeSlide }
								className={ slideClass.get( index ) || '' }
								key={ pattern.name }
								pattern={ pattern }
							/>
						) ) }
					</div>
				</div>
			</div>
		);
	}

	return (
		<div className="block-editor-block-pattern-setup__grid">
			<Composite
				role="listbox"
				className={ containerClass }
				aria-label={ __( 'Patterns list' ) }
			>
				{ patterns.map( ( pattern ) => (
					<BlockPattern
						key={ pattern.name }
						pattern={ pattern }
						onSelect={ onBlockPatternSelect }
						showTitles={ showTitles }
					/>
				) ) }
			</Composite>
		</div>
	);
};

function BlockPattern( { pattern, onSelect, showTitles } ) {
	const baseClassName = 'block-editor-block-pattern-setup-list';
	const { blocks, description, viewportWidth = 700 } = pattern;
	const descriptionId = useInstanceId(
		BlockPattern,
		`${ baseClassName }__item-description`
	);
	return (
		<div className={ `${ baseClassName }__list-item` }>
			<Composite.Item
				render={
					<div
						aria-describedby={
							description ? descriptionId : undefined
						}
						aria-label={ pattern.title }
						className={ `${ baseClassName }__item` }
					/>
				}
				id={ `${ baseClassName }__pattern__${ pattern.name }` }
				role="option"
				onClick={ () => onSelect( blocks ) }
			>
				<BlockPreview
					blocks={ blocks }
					viewportWidth={ viewportWidth }
				/>
				{ showTitles && (
					<div className={ `${ baseClassName }__item-title` }>
						{ pattern.title }
					</div>
				) }
				{ !! description && (
					<VisuallyHidden id={ descriptionId }>
						{ description }
					</VisuallyHidden>
				) }
			</Composite.Item>
		</div>
	);
}

function BlockPatternSlide( { active, className, pattern, minHeight } ) {
	const { blocks, title, description } = pattern;
	const descriptionId = useInstanceId(
		BlockPatternSlide,
		'block-editor-block-pattern-setup-list__item-description'
	);
	return (
		<div
			aria-hidden={ ! active }
			role="img"
			className={ `pattern-slide ${ className }` }
			aria-label={ title }
			aria-describedby={ description ? descriptionId : undefined }
		>
			<BlockPreview blocks={ blocks } minHeight={ minHeight } />
			{ !! description && (
				<VisuallyHidden id={ descriptionId }>
					{ description }
				</VisuallyHidden>
			) }
		</div>
	);
}

const BlockPatternSetup = ( {
	clientId,
	blockName,
	filterPatternsFn,
	onBlockPatternSelect,
	initialViewMode = VIEWMODES.carousel,
	showTitles = false,
} ) => {
	const [ viewMode, setViewMode ] = useState( initialViewMode );
	const [ activeSlide, setActiveSlide ] = useState( 0 );
	const { replaceBlock } = useDispatch( blockEditorStore );
	const patterns = usePatternsSetup( clientId, blockName, filterPatternsFn );

	if ( ! patterns?.length ) {
		return null;
	}

	const onBlockPatternSelectDefault = ( blocks ) => {
		const clonedBlocks = blocks.map( ( block ) => cloneBlock( block ) );
		replaceBlock( clientId, clonedBlocks );
	};
	const onPatternSelectCallback =
		onBlockPatternSelect || onBlockPatternSelectDefault;
	return (
		<>
			<div
				className={ `block-editor-block-pattern-setup view-mode-${ viewMode }` }
			>
				<SetupContent
					viewMode={ viewMode }
					activeSlide={ activeSlide }
					patterns={ patterns }
					onBlockPatternSelect={ onPatternSelectCallback }
					showTitles={ showTitles }
				/>
				<SetupToolbar
					viewMode={ viewMode }
					setViewMode={ setViewMode }
					activeSlide={ activeSlide }
					totalSlides={ patterns.length }
					handleNext={ () => {
						setActiveSlide( ( active ) =>
							Math.min( active + 1, patterns.length - 1 )
						);
					} }
					handlePrevious={ () => {
						setActiveSlide( ( active ) =>
							Math.max( active - 1, 0 )
						);
					} }
					onBlockPatternSelect={ () => {
						onPatternSelectCallback(
							patterns[ activeSlide ].blocks
						);
					} }
				/>
			</div>
		</>
	);
};

export default BlockPatternSetup;