drip-table/lib/utils/sandbox.js

A tiny and powerful enterprise-class solution for building tables.

"use strict";

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

/**
 * This file is part of the drip-table project.
 * @link     : https://drip-table.jd.com/
 * @author   : Emil Zhai (root@derzh.com)
 * @modifier : Emil Zhai (root@derzh.com)
 * @copyright: Copyright (c) 2021 JD Network Technology Co., Ltd.
 */

/**
 * 执行器缓存，优化性能
 */
var evaluatorCache = new Map();
var timerEvaluatorGC = 0;

var evaluatorGC = function evaluatorGC() {
  evaluatorCache.clear();
};

var resetEvaluatorGC = function resetEvaluatorGC() {
  if (timerEvaluatorGC) {
    window.clearTimeout(timerEvaluatorGC);
  }

  timerEvaluatorGC = window.setTimeout(evaluatorGC, 2000);
};
/**
 * 通过 JavaScript 代码字符串创建函数
 *
 * @param script JavaScript 代码段
 * @param contextKeys 执行上下文变量名
 * @returns 创建的函数
 * @throws Error 创建异常
 */


var createEvaluator = function createEvaluator(script) {
  var contextKeys = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
  var key = script + JSON.stringify(contextKeys);
  var evaluator = evaluatorCache.has(key) ? evaluatorCache.get(key) : void 0;

  if (!evaluator) {
    // 包裹二阶函数，用于兼容微前端
    script = "return function(".concat(contextKeys.join(', '), ") { ").concat(script, "\n}");
    evaluator = new Function('window', script)(window);

    if (evaluator) {
      evaluatorCache.set(key, evaluator);
    }
  }

  resetEvaluatorGC();
  return evaluator;
};

exports.createEvaluator = createEvaluator;