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react-code-dataset / react-page /docs /examples /slate-plugin-src /htmlToSlate /HtmlToSlate.tsx

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	import flatten from 'lodash.flatten';
	import { jsx } from 'slate-hyperscript';
	import type { SlatePlugin } from '../types/SlatePlugin';
	import type { SlateState } from '../types/state';
	import parseHtml from './parseHtml';

	const HtmlToSlate = ({ plugins }: { plugins: SlatePlugin[] }) => {
	const deserializeElement = (el: Node) => {
	const nodename = el.nodeName.toUpperCase();

	if (el.nodeType === 3) {
	return el.textContent;
	} else if (el.nodeType !== 1) {
	return null;
	} else if (nodename === 'BR') {
	return '\n';
	}

	const { nodeName } = el;
	const parent = el;

	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	const children: any[] = flatten(
	Array.from(parent.childNodes).map(deserializeElement)
	);

	if (nodename === 'BODY') {
	return jsx('fragment', {}, children);
	}

	const matchingPlugin = plugins.find((p) => {
	return (
	p.pluginType === 'component' &&
	p.deserialize?.tagName === nodeName.toLowerCase()
	);
	});
	if (matchingPlugin && matchingPlugin.pluginType === 'component') {
	const elHtml = el as HTMLElement;
	if (!elHtml.style) {
	// xmldom has no style attribute
	// we monkey patch it in for easier style parsing
	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	(elHtml as any).style = new (require('cssstyle').CSSStyleDeclaration)();
	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	(elHtml.style as any).cssText = elHtml.getAttribute('style');
	}
	if (matchingPlugin.object === 'mark') {
	const attrs = {
	[matchingPlugin.type]:
	matchingPlugin?.deserialize?.getData?.(elHtml) ?? true,
	};

	return children.map((child) => jsx('text', attrs, child));
	} else {
	const data = matchingPlugin?.deserialize?.getData?.(elHtml);
	const attrs = {
	type: matchingPlugin.type,
	...(data ? { data } : {}), // don't add data if its empty
	};
	return jsx('element', attrs, children);
	}
	}

	return children;
	};

	return (htmlString: string): SlateState => {
	const parsed = parseHtml('<body>' + htmlString + '</body>');

	const fragment = deserializeElement(
	parsed.documentElement
	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	) as unknown as any[];
	const nodes = Array.isArray(fragment) ? fragment : [fragment];
	// filter empty nodes (that contain only text)
	return {
	slate: nodes.filter((n) => n.text?.trim() !== '' ?? true),
	};
	};
	};

	export default HtmlToSlate;