Token? processDoctype()

in lib/parser.dart [649:751]

• 99 lines of code
• 16 McCabe index (conditional complexity)

  Token? processDoctype(DoctypeToken token) {
    final name = token.name;
    var publicId = token.publicId?.toAsciiLowerCase();
    final systemId = token.systemId;
    final correct = token.correct;

    if ((name != 'html' ||
        publicId != null ||
        systemId != null && systemId != 'about:legacy-compat')) {
      parser.parseError(token.span, 'unknown-doctype');
    }

    publicId ??= '';

    tree.insertDoctype(token);

    if (!correct ||
        token.name != 'html' ||
        startsWithAny(publicId, const [
          '+//silmaril//dtd html pro v0r11 19970101//',
          '-//advasoft ltd//dtd html 3.0 aswedit + extensions//',
          '-//as//dtd html 3.0 aswedit + extensions//',
          '-//ietf//dtd html 2.0 level 1//',
          '-//ietf//dtd html 2.0 level 2//',
          '-//ietf//dtd html 2.0 strict level 1//',
          '-//ietf//dtd html 2.0 strict level 2//',
          '-//ietf//dtd html 2.0 strict//',
          '-//ietf//dtd html 2.0//',
          '-//ietf//dtd html 2.1e//',
          '-//ietf//dtd html 3.0//',
          '-//ietf//dtd html 3.2 final//',
          '-//ietf//dtd html 3.2//',
          '-//ietf//dtd html 3//',
          '-//ietf//dtd html level 0//',
          '-//ietf//dtd html level 1//',
          '-//ietf//dtd html level 2//',
          '-//ietf//dtd html level 3//',
          '-//ietf//dtd html strict level 0//',
          '-//ietf//dtd html strict level 1//',
          '-//ietf//dtd html strict level 2//',
          '-//ietf//dtd html strict level 3//',
          '-//ietf//dtd html strict//',
          '-//ietf//dtd html//',
          '-//metrius//dtd metrius presentational//',
          '-//microsoft//dtd internet explorer 2.0 html strict//',
          '-//microsoft//dtd internet explorer 2.0 html//',
          '-//microsoft//dtd internet explorer 2.0 tables//',
          '-//microsoft//dtd internet explorer 3.0 html strict//',
          '-//microsoft//dtd internet explorer 3.0 html//',
          '-//microsoft//dtd internet explorer 3.0 tables//',
          '-//netscape comm. corp.//dtd html//',
          '-//netscape comm. corp.//dtd strict html//',
          "-//o'reilly and associates//dtd html 2.0//",
          "-//o'reilly and associates//dtd html extended 1.0//",
          "-//o'reilly and associates//dtd html extended relaxed 1.0//",
          '-//softquad software//dtd hotmetal pro 6.0::19990601::extensions to html 4.0//',
          '-//softquad//dtd hotmetal pro 4.0::19971010::extensions to html 4.0//',
          '-//spyglass//dtd html 2.0 extended//',
          '-//sq//dtd html 2.0 hotmetal + extensions//',
          '-//sun microsystems corp.//dtd hotjava html//',
          '-//sun microsystems corp.//dtd hotjava strict html//',
          '-//w3c//dtd html 3 1995-03-24//',
          '-//w3c//dtd html 3.2 draft//',
          '-//w3c//dtd html 3.2 final//',
          '-//w3c//dtd html 3.2//',
          '-//w3c//dtd html 3.2s draft//',
          '-//w3c//dtd html 4.0 frameset//',
          '-//w3c//dtd html 4.0 transitional//',
          '-//w3c//dtd html experimental 19960712//',
          '-//w3c//dtd html experimental 970421//',
          '-//w3c//dtd w3 html//',
          '-//w3o//dtd w3 html 3.0//',
          '-//webtechs//dtd mozilla html 2.0//',
          '-//webtechs//dtd mozilla html//'
        ]) ||
        const [
          '-//w3o//dtd w3 html strict 3.0//en//',
          '-/w3c/dtd html 4.0 transitional/en',
          'html'
        ].contains(publicId) ||
        startsWithAny(publicId, const [
              '-//w3c//dtd html 4.01 frameset//',
              '-//w3c//dtd html 4.01 transitional//'
            ]) &&
            systemId == null ||
        systemId != null &&
            systemId.toLowerCase() ==
                'http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd') {
      parser.compatMode = 'quirks';
    } else if (startsWithAny(publicId, const [
          '-//w3c//dtd xhtml 1.0 frameset//',
          '-//w3c//dtd xhtml 1.0 transitional//'
        ]) ||
        startsWithAny(publicId, const [
              '-//w3c//dtd html 4.01 frameset//',
              '-//w3c//dtd html 4.01 transitional//'
            ]) &&
            systemId != null) {
      parser.compatMode = 'limited quirks';
    }
    parser.phase = parser._beforeHtmlPhase;
    return null;
  }