js-markdown/lib/syntax/block/AtxHeader.js

A markdown language js compiler.

/**
 * match a series of headers of atx format
 *
 * syntax like this:
 *
 *  # header 1 ( <h1></h1> )
 *  ## header 2 ( <h2></h2> )
 *  ### header 3 ( <h3></h3> )
 *  #### header 4 ( <h4></h4> )
 *  ##### header 5 ( <h5></h5> )
 *  ###### header 6 ( <h6></h6> )
 *
 * use 1-6 "#" characters at the start of the line, corresponding to header levels 1-6
 *
 * Optionally, you may "close" atx-style headers, like this:
 *
 *  # This is an H1 #
 *  ## This is an H2 ##
 *  ### This is an H3 ######
 *
 */
'use strict';

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

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

var _Valid = _interopRequireDefault(require("../../utils/Valid"));

var _Header = _interopRequireDefault(require("../../utils/Header"));

function parse(line, index, lines, renderTree) {
  var result = line.match(/^(#{1,6})\s*(.*?)\s*(?:#{1,6})?(?:\n|$)/); // if no match or no header content

  if (!result || _Valid["default"].isBlank(result[2])) {
    return;
  }

  var level = result[1].length,
      rawValue = result[2];
  return [{
    type: 'AtxHeader',
    level: level,
    rawValue: rawValue + '\n'
  }, index];
}

function render() {
  var data = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';
  var node = arguments.length > 1 ? arguments[1] : undefined;
  var renderTree = arguments.length > 2 ? arguments[2] : undefined;
  var level = node.level,
      innerHtml = "".concat(node.rawValue || '').concat(data);

  if (renderTree) {
    if (!renderTree.headerTree) {
      renderTree.headerTree = _Header["default"].initRoot();
    }

    _Header["default"].addHeaderNode(renderTree.headerTree, level, innerHtml);
  }

  return "<h".concat(level, "><a id=\"").concat(innerHtml, "\" href=\"#").concat(innerHtml, "\"></a>").concat(innerHtml, "</h").concat(level, ">");
}

var _default = {
  parse: parse,
  render: render
};
exports["default"] = _default;