@marp-team/marpit/lib/postcss/import/replace.js

The skinny framework for creating slide deck from Markdown

"use strict";

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

var _postcss = _interopRequireDefault(require("postcss"));

var _parse = _interopRequireDefault(require("./parse"));

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

/** @module */

/**
 * Marpit PostCSS import replace plugin.
 *
 * Replace parsed `@import` / `@import-theme` rules.
 *
 * Please see {@link module:postcss/import/parse} about the specification of
 * each syntax.
 *
 * @alias module:postcss/import/replace
 * @param {ThemeSet} themeSet ThemeSet instance.
 */
const plugin = _postcss.default.plugin('marpit-postcss-import-replace', (themeSet, importedThemes = []) => (0, _postcss.default)([_parse.default, css => {
  const prepends = [];
  css.walk(node => {
    const name = node.marpitImportParse;

    if (name) {
      const theme = themeSet.get(name);

      if (theme) {
        if (importedThemes.includes(name)) throw new Error(`Circular "${name}" theme import is detected.`);
        const processed = (0, _postcss.default)([plugin(themeSet, [...importedThemes, name])]).process(theme.css);

        if (node.name === 'import') {
          node.replaceWith(processed.root);
        } else {
          node.remove();
          prepends.unshift(processed.root);
        }
      }
    }
  });

  for (const root of prepends) css.first.before(root);
}]));

var _default = plugin;
exports.default = _default;