@marp-team/marpit/lib/markdown/header_and_footer.js

The skinny framework for creating slide deck from Markdown

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _wrap_tokens = _interopRequireDefault(require("../helpers/wrap_tokens"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/** @module */

/**
 * Marpit header and footer plugin.
 *
 * At each slide, add header and footer that are provided by directives.
 *
 * @alias module:markdown/header_and_footer
 * @param {MarkdownIt} md markdown-it instance.
 */
function headerAndFooter(md) {
  md.core.ruler.after('marpit_directives_apply', 'marpit_header_and_footer', state => {
    if (state.inlineMode) return;
    const parsedInlines = new Map();

    const getParsed = markdown => {
      let parsed = parsedInlines.get(markdown);

      if (!parsed) {
        parsed = md.parseInline(markdown, state.env);
        delete parsed.map;
        parsedInlines.set(markdown, parsed);
      }

      return parsed;
    };

    const createMarginalTokens = (tag, markdown) => (0, _wrap_tokens.default)(`marpit_${tag}`, {
      tag,
      close: {
        block: true
      }
    }, getParsed(markdown));

    let current;
    const newTokens = [];

    for (const token of state.tokens) {
      if (token.type === 'marpit_slide_open') {
        current = token;
        newTokens.push(token);
        if (current.meta && current.meta.marpitHeader) newTokens.push(...createMarginalTokens('header', current.meta.marpitHeader));
      } else if (token.type === 'marpit_slide_close') {
        if (current.meta && current.meta.marpitFooter) newTokens.push(...createMarginalTokens('footer', current.meta.marpitFooter));
        newTokens.push(token);
      } else {
        newTokens.push(token);
      }
    }

    state.tokens = newTokens;
  });
}

var _default = headerAndFooter;
exports.default = _default;