@wordpress/block-library/src/button/index.js

/**
 * External dependencies
 */
import classnames from 'classnames';
import { omit, pick } from 'lodash';

/**
 * WordPress dependencies
 */
import { G, Path, SVG } from '@wordpress/components';
import { __, _x } from '@wordpress/i18n';
import {
	RichText,
	getColorClassName,
} from '@wordpress/block-editor';

/**
 * Internal dependencies
 */
import edit from './edit';

const blockAttributes = {
	url: {
		type: 'string',
		source: 'attribute',
		selector: 'a',
		attribute: 'href',
	},
	title: {
		type: 'string',
		source: 'attribute',
		selector: 'a',
		attribute: 'title',
	},
	text: {
		type: 'string',
		source: 'html',
		selector: 'a',
	},
	backgroundColor: {
		type: 'string',
	},
	textColor: {
		type: 'string',
	},
	customBackgroundColor: {
		type: 'string',
	},
	customTextColor: {
		type: 'string',
	},
};

export const name = 'core/button';

const colorsMigration = ( attributes ) => {
	return omit( {
		...attributes,
		customTextColor: attributes.textColor && '#' === attributes.textColor[ 0 ] ? attributes.textColor : undefined,
		customBackgroundColor: attributes.color && '#' === attributes.color[ 0 ] ? attributes.color : undefined,
	}, [ 'color', 'textColor' ] );
};

export const settings = {
	title: __( 'Button' ),

	description: __( 'Prompt visitors to take action with a button-style link.' ),

	icon: <SVG viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><Path fill="none" d="M0 0h24v24H0V0z" /><G><Path d="M19 6H5c-1.1 0-2 .9-2 2v8c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V8c0-1.1-.9-2-2-2zm0 10H5V8h14v8z" /></G></SVG>,

	category: 'layout',

	keywords: [ __( 'link' ) ],

	attributes: blockAttributes,

	supports: {
		align: true,
		alignWide: false,
	},

	styles: [
		{ name: 'default', label: _x( 'Default', 'block style' ), isDefault: true },
		{ name: 'outline', label: __( 'Outline' ) },
		{ name: 'squared', label: _x( 'Squared', 'block style' ) },
	],

	edit,

	save( { attributes } ) {
		const {
			url,
			text,
			title,
			backgroundColor,
			textColor,
			customBackgroundColor,
			customTextColor,
		} = attributes;

		const textClass = getColorClassName( 'color', textColor );
		const backgroundClass = getColorClassName( 'background-color', backgroundColor );

		const buttonClasses = classnames( 'wp-block-button__link', {
			'has-text-color': textColor || customTextColor,
			[ textClass ]: textClass,
			'has-background': backgroundColor || customBackgroundColor,
			[ backgroundClass ]: backgroundClass,
		} );

		const buttonStyle = {
			backgroundColor: backgroundClass ? undefined : customBackgroundColor,
			color: textClass ? undefined : customTextColor,
		};

		return (
			<div>
				<RichText.Content
					tagName="a"
					className={ buttonClasses }
					href={ url }
					title={ title }
					style={ buttonStyle }
					value={ text }
				/>
			</div>
		);
	},

	deprecated: [ {
		attributes: {
			...pick( blockAttributes, [ 'url', 'title', 'text' ] ),
			color: {
				type: 'string',
			},
			textColor: {
				type: 'string',
			},
			align: {
				type: 'string',
				default: 'none',
			},
		},

		save( { attributes } ) {
			const { url, text, title, align, color, textColor } = attributes;

			const buttonStyle = {
				backgroundColor: color,
				color: textColor,
			};

			const linkClass = 'wp-block-button__link';

			return (
				<div className={ `align${ align }` }>
					<RichText.Content
						tagName="a"
						className={ linkClass }
						href={ url }
						title={ title }
						style={ buttonStyle }
						value={ text }
					/>
				</div>
			);
		},
		migrate: colorsMigration,
	},
	{
		attributes: {
			...pick( blockAttributes, [ 'url', 'title', 'text' ] ),
			color: {
				type: 'string',
			},
			textColor: {
				type: 'string',
			},
			align: {
				type: 'string',
				default: 'none',
			},
		},

		save( { attributes } ) {
			const { url, text, title, align, color, textColor } = attributes;

			return (
				<div className={ `align${ align }` } style={ { backgroundColor: color } }>
					<RichText.Content
						tagName="a"
						href={ url }
						title={ title }
						style={ { color: textColor } }
						value={ text }
					/>
				</div>
			);
		},
		migrate: colorsMigration,
	},
	],
};