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import { setLock } from "./constructor-lock.ts";import { nodesFromString } from "./deserialize.ts";import { DocumentType, HTMLDocument } from "./document.ts";import type { Element } from "./element.ts";
export type DOMParserMimeType =  "text/html"  | "text/xml"  | "application/xml"  | "application/xhtml+xml"  | "image/svg+xml";
export class DOMParser {  parseFromString(source: string, mimeType: DOMParserMimeType): HTMLDocument | null {    if (mimeType !== "text/html") {      throw new Error(`DOMParser: "${mimeType}" unimplemented`); // TODO    }
    setLock(false);    const doc = new HTMLDocument();
    setLock(false);    const docType = new DocumentType("html", "", "");    doc.appendChild(docType);
    const fakeDoc = nodesFromString(source);    let htmlNode: Element | null = null;
    for (const child of fakeDoc.childNodes) {      doc.appendChild(child);
      if (child.nodeName === "HTML") {        htmlNode = <Element>child;      }    }
    setLock(true);
    if (htmlNode) {      for (const child of htmlNode.childNodes) {        switch ((<Element>child).tagName) {          case "HEAD":            doc.head = <Element>child;            break;          case "BODY":            doc.body = <Element>child;            break;        }      }    }
    return doc;  }}