@wordpress/block-editor/build-module/components/editor-styles/index.js

Generic block editor.

import { createElement, Fragment } from "@wordpress/element";

/**
 * External dependencies
 */
import tinycolor from 'tinycolor2';
/**
 * WordPress dependencies
 */

import { useCallback } from '@wordpress/element';
/**
 * Internal dependencies
 */

import transformStyles from '../../utils/transform-styles';
const EDITOR_STYLES_SELECTOR = '.editor-styles-wrapper';

function useDarkThemeBodyClassName(styles) {
  return useCallback(node => {
    if (!node) {
      return;
    }

    const {
      ownerDocument
    } = node;
    const {
      defaultView,
      body
    } = ownerDocument;
    const canvas = ownerDocument.querySelector(EDITOR_STYLES_SELECTOR);
    const backgroundColor = defaultView.getComputedStyle(canvas, null).getPropertyValue('background-color');

    if (tinycolor(backgroundColor).getLuminance() > 0.5) {
      body.classList.remove('is-dark-theme');
    } else {
      body.classList.add('is-dark-theme');
    }
  }, [styles]);
}

export default function EditorStyles({
  styles
}) {
  return createElement(Fragment, null, createElement("style", {
    ref: useDarkThemeBodyClassName(styles)
  }), transformStyles(styles, EDITOR_STYLES_SELECTOR).map((css, index) => createElement("style", {
    key: index
  }, css)));
}
//# sourceMappingURL=index.js.map