@vivliostyle/vfm/lib/plugins/slug.js

Custom Markdown syntax specialized in book authoring.

"use strict";
/**
 * derived from `remark-slug`.
 * original: Copyright (c) 2015 Titus Wormer <tituswormer@gmail.com>
 * modified: 2021 and later is Akabeko
 * @license MIT
 * @see https://github.com/remarkjs/remark-slug
 */
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
    if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
        if (ar || !(i in from)) {
            if (!ar) ar = Array.prototype.slice.call(from, 0, i);
            ar[i] = from[i];
        }
    }
    return to.concat(ar || Array.prototype.slice.call(from));
};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.mdast = void 0;
var github_slugger_1 = __importDefault(require("github-slugger"));
var mdast_util_to_string_1 = __importDefault(require("mdast-util-to-string"));
var unist_util_select_1 = require("unist-util-select");
/**
 * Create slug from `id` or heading children.
 * @param heading Heading.
 * @param slugs Slugger.
 * @returns
 */
var createSlug = function (heading, slugger) {
    if (heading.data && heading.data.hProperties && heading.data.hProperties.id) {
        return slugger.slug(heading.data.hProperties.id, true);
    }
    // Create slug string with footnotes removed
    var children = __spreadArray([], heading.children, true);
    heading.children = heading.children.filter(function (child) { return child.type !== 'footnote'; });
    var text = slugger.slug((0, mdast_util_to_string_1.default)(heading).replace(/<[^<>]*>/g, ''));
    heading.children = children;
    return text;
};
/**
 * Process Markdown AST.
 * @returns Transformer.
 */
var mdast = function () { return function (tree) {
    var slugger = new github_slugger_1.default();
    slugger.reset();
    var headings = (0, unist_util_select_1.selectAll)('heading', tree);
    for (var _i = 0, headings_1 = headings; _i < headings_1.length; _i++) {
        var heading = headings_1[_i];
        var id = createSlug(heading, slugger);
        if (!heading.data) {
            heading.data = {};
        }
        if (!heading.data.hProperties) {
            heading.data.hProperties = {};
        }
        heading.data.id = id;
        heading.data.hProperties.id = id;
    }
}; };
exports.mdast = mdast;