target/classes/static/plugins/element-ui/packages/table/src/util.js

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import { getValueByPath } from 'element-ui/src/utils/util';

export const getCell = function(event) {
  let cell = event.target;

  while (cell && cell.tagName.toUpperCase() !== 'HTML') {
    if (cell.tagName.toUpperCase() === 'TD') {
      return cell;
    }
    cell = cell.parentNode;
  }

  return null;
};

const isObject = function(obj) {
  return obj !== null && typeof obj === 'object';
};

export const orderBy = function(array, sortKey, reverse, sortMethod, sortBy) {
  if (!sortKey && !sortMethod && (!sortBy || Array.isArray(sortBy) && !sortBy.length)) {
    return array;
  }
  if (typeof reverse === 'string') {
    reverse = reverse === 'descending' ? -1 : 1;
  } else {
    reverse = (reverse && reverse < 0) ? -1 : 1;
  }
  const getKey = sortMethod ? null : function(value, index) {
    if (sortBy) {
      if (!Array.isArray(sortBy)) {
        sortBy = [sortBy];
      }
      return sortBy.map(function(by) {
        if (typeof by === 'string') {
          return getValueByPath(value, by);
        } else {
          return by(value, index, array);
        }
      });
    }
    if (sortKey !== '$key') {
      if (isObject(value) && '$value' in value) value = value.$value;
    }
    return [isObject(value) ? getValueByPath(value, sortKey) : value];
  };
  const compare = function(a, b) {
    if (sortMethod) {
      return sortMethod(a.value, b.value);
    }
    for (let i = 0, len = a.key.length; i < len; i++) {
      if (a.key[i] < b.key[i]) {
        return -1;
      }
      if (a.key[i] > b.key[i]) {
        return 1;
      }
    }
    return 0;
  };