103 lines
4.4 KiB
Java
103 lines
4.4 KiB
Java
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.getCurrentRunningApp = getCurrentRunningApp;
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exports.getProxyPropertyValue = getProxyPropertyValue;
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exports.getTargetValue = getTargetValue;
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exports.setCurrentRunningApp = setCurrentRunningApp;
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var _utils = require("../utils");
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/**
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* @author Kuitos
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* @since 2020-04-13
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*/
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var currentRunningApp = null;
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/**
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* get the app that running tasks at current tick
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*/
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function getCurrentRunningApp() {
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return currentRunningApp;
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}
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function setCurrentRunningApp(appInstance) {
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// set currentRunningApp and it's proxySandbox to global window, as its only use case is for document.createElement from now on, which hijacked by a global way
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currentRunningApp = appInstance;
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}
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var functionBoundedValueMap = new WeakMap();
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function getTargetValue(target, _value) {
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/*
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仅绑定 isCallable && !isBoundedFunction && !isConstructable 的函数对象，如 window.console、window.atob 这类，不然微应用中调用时会抛出 Illegal invocation 异常
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目前没有完美的检测方式，这里通过 prototype 中是否还有可枚举的拓展方法的方式来判断
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@warning 这里不要随意替换成别的判断方式，因为可能触发一些 edge case（比如在 lodash.isFunction 在 iframe 上下文中可能由于调用了 top window 对象触发的安全异常）
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*/
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if ((0, _utils.isCallable)(_value) && !(0, _utils.isBoundedFunction)(_value) && !(0, _utils.isConstructable)(_value)) {
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var cachedBoundFunction = functionBoundedValueMap.get(_value);
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if (cachedBoundFunction) {
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return cachedBoundFunction;
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}
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var boundValue = Function.prototype.bind.call(_value, target); // some callable function has custom fields, we need to copy the enumerable props to boundValue. such as moment function.
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// use for..in rather than Object.keys.forEach for performance reason
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// eslint-disable-next-line guard-for-in,no-restricted-syntax
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for (var key in _value) {
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boundValue[key] = _value[key];
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} // copy prototype if bound function not have but target one have
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// as prototype is non-enumerable mostly, we need to copy it from target function manually
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if (_value.hasOwnProperty('prototype') && !boundValue.hasOwnProperty('prototype')) {
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// we should not use assignment operator to set boundValue prototype like `boundValue.prototype = value.prototype`
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// as the assignment will also look up prototype chain while it hasn't own prototype property,
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// when the lookup succeed, the assignment will throw an TypeError like `Cannot assign to read only property 'prototype' of function` if its descriptor configured with writable false or just have a getter accessor
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// see https://github.com/umijs/qiankun/issues/1121
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Object.defineProperty(boundValue, 'prototype', {
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value: _value.prototype,
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enumerable: false,
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writable: true
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});
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} // Some util, like `function isNative() { return typeof Ctor === 'function' && /native code/.test(Ctor.toString()) }` relies on the original `toString()` result
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// but bound functions will always return "function() {[native code]}" for `toString`, which is misleading
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if (typeof _value.toString === 'function') {
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var valueHasInstanceToString = _value.hasOwnProperty('toString') && !boundValue.hasOwnProperty('toString');
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var boundValueHasPrototypeToString = boundValue.toString === Function.prototype.toString;
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if (valueHasInstanceToString || boundValueHasPrototypeToString) {
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var originToStringDescriptor = Object.getOwnPropertyDescriptor(valueHasInstanceToString ? _value : Function.prototype, 'toString');
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Object.defineProperty(boundValue, 'toString', Object.assign(Object.assign({}, originToStringDescriptor), (originToStringDescriptor === null || originToStringDescriptor === void 0 ? void 0 : originToStringDescriptor.get) ? null : {
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value: function value() {
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return _value.toString();
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}
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}));
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}
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}
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functionBoundedValueMap.set(_value, boundValue);
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return boundValue;
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}
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return _value;
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}
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var getterInvocationResultMap = new WeakMap();
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function getProxyPropertyValue(getter) {
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var getterResult = getterInvocationResultMap.get(getter);
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if (!getterResult) {
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var result = getter();
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getterInvocationResultMap.set(getter, result);
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return result;
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}
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return getterResult;
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} |