tag-soup/lib/createHtmlSaxParser.js

The fastest pure JS SAX/DOM XML/HTML parser.

import { __assign } from "tslib";
import { createSaxParser } from './createSaxParser';
import { decodeHtml } from 'speedy-entities';
/**
 * Creates a pre-configured HTML SAX parser.
 *
 * @param handler The parsing handler.
 * @param options Options that override the defaults.
 */
export function createHtmlSaxParser(handler, options) {
    return createSaxParser(handler, __assign(__assign({}, htmlParserOptions), options));
}
/**
 * The default HTML parser options:
 * - CDATA sections and processing instructions are treated as comments;
 * - Self-closing tags are treated as a start tags;
 * - Tags like `p`, `li`, `td` and others follow implicit end rules, so `<p>foo<p>bar` is parsed as
 * `<p>foo</p><p>bar</p>`;
 * - Tag and attribute names are converted to lower case;
 * - Legacy HTML entities are decoded in text and attribute values. To decode all known HTML entities use:
 *
 * ```ts
 * import {decodeHtml} from 'speedy-entities/lib/full';
 *
 * createHtmlSaxParser({
 *   decodeText: decodeHtml,
 *   decodeAttribute: decodeHtml,
 * });
 * ```
 *
 * @see {@link https://github.com/smikhalevski/speedy-entities decodeHtml}
 */
export var htmlParserOptions = {
    decodeText: decodeHtml,
    decodeAttribute: decodeHtml,
    renameTag: toLowerCase,
    renameAttribute: toLowerCase,
    checkCdataTag: checkCdataTag,
    checkVoidTag: checkVoidTag,
    endsAncestorAt: endsAncestorAt,
};
function toLowerCase(name) {
    return name.toLowerCase();
}
function checkCdataTag(token) {
    return cdataTags.has(token.name);
}
function checkVoidTag(token) {
    return voidTags.has(token.name);
}
function endsAncestorAt(ancestors, token) {
    var tagNames = implicitEndMap.get(token.name);
    if (tagNames) {
        for (var i = ancestors.length - 1; i >= 0; --i) {
            if (tagNames.has(ancestors[i].name)) {
                return i;
            }
        }
    }
    return -1;
}
var voidTags = toSet('area base basefont br col command embed frame hr img input isindex keygen link meta param source track wbr');
var cdataTags = toSet('script style textarea');
var formTags = toSet('input option optgroup select button datalist textarea');
var pTags = toSet('p');
var implicitEndMap = toMap({
    tr: toSet('tr th td'),
    th: toSet('th'),
    td: toSet('thead th td'),
    body: toSet('head link script'),
    li: toSet('li'),
    option: toSet('option'),
    optgroup: toSet('optgroup option'),
    dd: toSet('dt dd'),
    dt: toSet('dt dd'),
    select: formTags,
    input: formTags,
    output: formTags,
    button: formTags,
    datalist: formTags,
    textarea: formTags,
    p: pTags,
    h1: pTags,
    h2: pTags,
    h3: pTags,
    h4: pTags,
    h5: pTags,
    h6: pTags,
    address: pTags,
    article: pTags,
    aside: pTags,
    blockquote: pTags,
    details: pTags,
    div: pTags,
    dl: pTags,
    fieldset: pTags,
    figcaption: pTags,
    figure: pTags,
    footer: pTags,
    form: pTags,
    header: pTags,
    hr: pTags,
    main: pTags,
    nav: pTags,
    ol: pTags,
    pre: pTags,
    section: pTags,
    table: pTags,
    ul: pTags,
    rt: toSet('rt rp'),
    rp: toSet('rt rp'),
    tbody: toSet('thead tbody'),
    tfoot: toSet('thead tbody'),
});
function toSet(data) {
    return new Set(data.split(' '));
}
function toMap(rec) {
    return new Map(Object.entries(rec));
}