parse5/dist/common/doctype.js

HTML parser and serializer.

import { DOCUMENT_MODE } from './html.js';
//Const
const VALID_DOCTYPE_NAME = 'html';
const VALID_SYSTEM_ID = 'about:legacy-compat';
const QUIRKS_MODE_SYSTEM_ID = 'http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd';
const QUIRKS_MODE_PUBLIC_ID_PREFIXES = [
    '+//silmaril//dtd html pro v0r11 19970101//',
    '-//as//dtd html 3.0 aswedit + extensions//',
    '-//advasoft ltd//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//",
    '-//sq//dtd html 2.0 hotmetal + extensions//',
    '-//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//',
    '-//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 QUIRKS_MODE_NO_SYSTEM_ID_PUBLIC_ID_PREFIXES = [
    ...QUIRKS_MODE_PUBLIC_ID_PREFIXES,
    '-//w3c//dtd html 4.01 frameset//',
    '-//w3c//dtd html 4.01 transitional//',
];
const QUIRKS_MODE_PUBLIC_IDS = new Set([
    '-//w3o//dtd w3 html strict 3.0//en//',
    '-/w3c/dtd html 4.0 transitional/en',
    'html',
]);
const LIMITED_QUIRKS_PUBLIC_ID_PREFIXES = ['-//w3c//dtd xhtml 1.0 frameset//', '-//w3c//dtd xhtml 1.0 transitional//'];
const LIMITED_QUIRKS_WITH_SYSTEM_ID_PUBLIC_ID_PREFIXES = [
    ...LIMITED_QUIRKS_PUBLIC_ID_PREFIXES,
    '-//w3c//dtd html 4.01 frameset//',
    '-//w3c//dtd html 4.01 transitional//',
];
//Utils
function hasPrefix(publicId, prefixes) {
    return prefixes.some((prefix) => publicId.startsWith(prefix));
}
//API
export function isConforming(token) {
    return (token.name === VALID_DOCTYPE_NAME &&
        token.publicId === null &&
        (token.systemId === null || token.systemId === VALID_SYSTEM_ID));
}
export function getDocumentMode(token) {
    if (token.name !== VALID_DOCTYPE_NAME) {
        return DOCUMENT_MODE.QUIRKS;
    }
    const { systemId } = token;
    if (systemId && systemId.toLowerCase() === QUIRKS_MODE_SYSTEM_ID) {
        return DOCUMENT_MODE.QUIRKS;
    }
    let { publicId } = token;
    if (publicId !== null) {
        publicId = publicId.toLowerCase();
        if (QUIRKS_MODE_PUBLIC_IDS.has(publicId)) {
            return DOCUMENT_MODE.QUIRKS;
        }
        let prefixes = systemId === null ? QUIRKS_MODE_NO_SYSTEM_ID_PUBLIC_ID_PREFIXES : QUIRKS_MODE_PUBLIC_ID_PREFIXES;
        if (hasPrefix(publicId, prefixes)) {
            return DOCUMENT_MODE.QUIRKS;
        }
        prefixes =
            systemId === null ? LIMITED_QUIRKS_PUBLIC_ID_PREFIXES : LIMITED_QUIRKS_WITH_SYSTEM_ID_PUBLIC_ID_PREFIXES;
        if (hasPrefix(publicId, prefixes)) {
            return DOCUMENT_MODE.LIMITED_QUIRKS;
        }
    }
    return DOCUMENT_MODE.NO_QUIRKS;
}
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