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Viewing file:     validate-names.js (2 KB)      -rw-r--r--

"use strict";
const xnv = require("xml-name-validator");
const DOMException = require("domexception/webidl2js-wrapper");
const { XML_NS, XMLNS_NS } = require("../helpers/namespaces");

// https://dom.spec.whatwg.org/#validate

exports.name = (globalObject, name) => {
  if (!xnv.name(name)) {
    throw DOMException.create(globalObject, [`"${name}" did not match the Name production`, "InvalidCharacterError"]);
  }
};

exports.qname = (globalObject, qname) => {
  if (!xnv.qname(qname)) {
    throw DOMException.create(globalObject, [`"${qname}" did not match the QName production`, "InvalidCharacterError"]);
  }
};

exports.validateAndExtract = (globalObject, namespace, qualifiedName) => {
  if (namespace === "") {
    namespace = null;
  }

  exports.qname(globalObject, qualifiedName);

  let prefix = null;
  let localName = qualifiedName;

  const colonIndex = qualifiedName.indexOf(":");
  if (colonIndex !== -1) {
    prefix = qualifiedName.substring(0, colonIndex);
    localName = qualifiedName.substring(colonIndex + 1);
  }

  if (prefix !== null && namespace === null) {
    throw DOMException.create(globalObject, [
      "A namespace was given but a prefix was also extracted from the qualifiedName",
      "NamespaceError"
    ]);
  }

  if (prefix === "xml" && namespace !== XML_NS) {
    throw DOMException.create(globalObject, [
      "A prefix of \"xml\" was given but the namespace was not the XML namespace",
      "NamespaceError"
    ]);
  }

  if ((qualifiedName === "xmlns" || prefix === "xmlns") && namespace !== XMLNS_NS) {
    throw DOMException.create(globalObject, [
      "A prefix or qualifiedName of \"xmlns\" was given but the namespace was not the XMLNS namespace",
      "NamespaceError"
    ]);
  }

  if (namespace === XMLNS_NS && qualifiedName !== "xmlns" && prefix !== "xmlns") {
    throw DOMException.create(globalObject, [
      "The XMLNS namespace was given but neither the prefix nor qualifiedName was \"xmlns\"",
      "NamespaceError"
    ]);
  }

  return { namespace, prefix, localName };
};