119 lines
3.1 KiB
JavaScript
119 lines
3.1 KiB
JavaScript
'use strict';
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const htmlEscapeMap = {
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"&": "&",
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"<": "<",
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">": ">",
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"'": "'",
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'"': """
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};
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const htmlEscapeRegexp = /[&<>'"]/g;
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const htmlEscape = (str) => str.replace(
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htmlEscapeRegexp,
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(char) => htmlEscapeMap[char]
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);
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const htmlUnescapeMap = {
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"&": "&",
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"&": "&",
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"<": "<",
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"<": "<",
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">": ">",
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">": ">",
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"'": "'",
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"'": "'",
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""": '"',
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""": '"'
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};
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const htmlUnescapeRegexp = /&(amp|#38|lt|#60|gt|#62|apos|#39|quot|#34);/g;
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const htmlUnescape = (str) => str.replace(
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htmlUnescapeRegexp,
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(char) => htmlUnescapeMap[char]
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);
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const resolveTitleFromToken = (token, { shouldAllowHtml, shouldEscapeText }) => {
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const children = token.children ?? [];
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const titleTokenTypes = ["text", "emoji", "code_inline"];
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if (shouldAllowHtml) {
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titleTokenTypes.push("html_inline");
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}
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const titleTokens = children.filter(
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(item) => titleTokenTypes.includes(item.type) && // filter permalink symbol that generated by markdown-it-anchor
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!item.meta?.isPermalinkSymbol
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);
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return titleTokens.reduce((result, item) => {
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if (shouldEscapeText) {
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if (item.type === "code_inline" || item.type === "text") {
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return `${result}${htmlEscape(item.content)}`;
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}
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}
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return `${result}${item.content}`;
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}, "").trim();
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};
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const resolveHeadersFromTokens = (tokens, {
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level,
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shouldAllowHtml,
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shouldAllowNested,
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shouldEscapeText,
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slugify,
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format
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}) => {
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const headers = [];
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const stack = [];
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const push = (header) => {
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while (stack.length !== 0 && header.level <= stack[0].level) {
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stack.shift();
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}
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if (stack.length === 0) {
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headers.push(header);
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stack.push(header);
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} else {
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stack[0].children.push(header);
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stack.unshift(header);
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}
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};
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for (let i = 0; i < tokens.length; i += 1) {
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const token = tokens[i];
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if (token.type !== "heading_open") {
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continue;
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}
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if (token.level !== 0 && !shouldAllowNested) {
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continue;
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}
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const headerLevel = Number.parseInt(token.tag.slice(1), 10);
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if (!level.includes(headerLevel)) {
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continue;
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}
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const nextToken = tokens[i + 1];
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/* istanbul ignore if -- @preserve */
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if (!nextToken) {
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continue;
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}
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const title = resolveTitleFromToken(nextToken, {
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shouldAllowHtml,
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shouldEscapeText
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});
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const slug = token.attrGet("id") ?? slugify(title);
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push({
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level: headerLevel,
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title: format?.(title) ?? title,
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slug,
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link: `#${slug}`,
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children: []
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});
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}
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return headers;
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};
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const rControl = /[\u0000-\u001f]/g;
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const rSpecial = /[\s~`!@#$%^&*()\-_+=[\]{}|\\;:"'“”‘’<>,.?/]+/g;
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const rCombining = /[\u0300-\u036F]/g;
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const slugify = (str) => str.normalize("NFKD").replace(rCombining, "").replace(rControl, "").replace(rSpecial, "-").replace(/-{2,}/g, "-").replace(/^-+|-+$/g, "").replace(/^(\d)/, "_$1").toLowerCase();
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exports.htmlEscape = htmlEscape;
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exports.htmlUnescape = htmlUnescape;
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exports.resolveHeadersFromTokens = resolveHeadersFromTokens;
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exports.resolveTitleFromToken = resolveTitleFromToken;
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exports.slugify = slugify;
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