js-markdown/lib/syntax/inline/Image.js

A markdown language js compiler.

/**
 * match a image
 *
 * (1) basic syntax like this:
 *
 *  ![alt text](/path/to/img.jpg "optional title")
 *
 * (2) use a reference define
 *
 *  ![alt text][reference define]
 *  [reference define]: url/to/image "optional title attribute"
 *
 */
'use strict';

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

function parse(str, children, renderTree) {
  var result = str.match(/^!\[(.*?)\][ \t]*\([ \t]*([^")]*?)(?:[ \t]+(["'])(.*?)\3)?[ \t]*\)/); // basic usage

  if (result) {
    var node = {
      type: 'Image',
      alt: result[1],
      src: result[2]
    };

    if (result[4]) {
      node.title = result[4];
    }

    return [node, result[0].length];
  }

  result = str.match(/^!\[(.*?)\][ \t]*\[(.*?)\]/); // use reference define

  if (result) {
    var ref = renderTree.referenceDefine[result[2].toLowerCase()];

    if (!ref) {
      return;
    }

    var _node = {
      type: 'Image',
      alt: result[1],
      src: ref.href
    };

    if (ref.title) {
      _node.title = ref.title;
    }

    return [_node, result[0].length];
  }
}

function render() {
  var data = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';
  var node = arguments.length > 1 ? arguments[1] : undefined;
  return "<img".concat(node.alt ? " alt=\"".concat(node.alt, "\"") : '').concat(node.title ? " title=\"".concat(node.title, "\"") : '', " src=\"").concat(node.src, "\"/>");
}

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