js-markdown/lib/utils/Util.js

A markdown language js compiler.

'use strict';

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

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

var _Str = _interopRequireDefault(require("./Str"));

function preOrderTraverse(node, callback) {
  var deep = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;

  if (!callback.call(this, node, deep)) {
    return;
  }

  if (node.children && node.children.length > 0) {
    for (var i = 0, len = node.children.length; i < len; i++) {
      preOrderTraverse.call(this, node.children[i], callback, deep + 1);
    }
  }
}
/**
 * a tree traverse method
 * @param node
 * @param callback
 * @param deep
 */


function postOrderTraverse(node, callback) {
  var deep = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;

  if (node.children && node.children.length > 0) {
    for (var i = 0, len = node.children.length; i < len; i++) {
      postOrderTraverse.call(this, node.children[i], callback, deep + 1);
    }
  }

  callback.call(this, node, deep);
}
/**
 * remove blank(or only includes space and tab) item in array
 * @param array
 * @returns {*}
 */


function trimEndBlankLines(array) {
  if (!array || array.length < 1) {
    return array;
  }

  var temp;

  while (array.length > 0) {
    temp = array[array.length - 1];

    if (temp === '' || _Str["default"].trim(temp, ' \t') === '') {
      array.pop();
    } else {
      break;
    }
  }

  return array;
}

var _default = {
  preOrderTraverse: preOrderTraverse,
  postOrderTraverse: postOrderTraverse,
  trimEndBlankLines: trimEndBlankLines
};
exports["default"] = _default;