445 lines
13 KiB
JavaScript
445 lines
13 KiB
JavaScript
"use strict";
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function _createForOfIteratorHelper(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it.return != null) it.return(); } finally { if (didErr) throw err; } } }; }
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function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
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function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
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function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
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var PENDING = void 0,
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FULFILLED = true,
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REJECTED = false;
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var Promifill = /*#__PURE__*/function () {
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_createClass(Promifill, [{
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key: "state",
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get: function get() {
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return PENDING;
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}
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}, {
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key: "value",
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get: function get() {
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return void 0;
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}
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}, {
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key: "settled",
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get: function get() {
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return false;
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}
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}]);
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function Promifill(executor) {
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var _this = this;
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_classCallCheck(this, Promifill);
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if (typeof executor != "function") {
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throw new TypeError("Promise resolver ".concat(Object.prototype.toString.call(executor), " is not a function"));
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}
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defineProperty(this, "chain", []);
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defineProperty(this, "observers", []);
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var secret = [];
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var resolve = function resolve(value, bypassKey) {
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if (_this.settled && bypassKey !== secret) {
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return;
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}
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defineProperty(_this, "settled", true);
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var then_ = value && value.then;
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var thenable = typeof then_ == "function";
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if (thenable) {
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defineProperty(value, "preventThrow", true);
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}
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if (thenable && value.state === PENDING) {
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then_.call(value, function (v) {
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return resolve(v, secret);
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}, function (r) {
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return reject(r, secret);
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});
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} else {
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defineProperty(_this, "value", thenable ? value.value : value);
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defineProperty(_this, "state", thenable ? value.state : FULFILLED);
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schedule(_this.observers.map(function (observer) {
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return {
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handler: _this.state === FULFILLED ? observer.onfulfill : observer.onreject,
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value: _this.value
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};
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}));
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if (_this.state === REJECTED) {
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raiseUnhandledPromiseRejectionException(_this.value, _this);
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}
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}
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};
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var reject = function reject(reason, bypassKey) {
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if (_this.settled && bypassKey !== secret) {
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return;
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}
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defineProperty(_this, "settled", true);
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defineProperty(_this, "value", reason);
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defineProperty(_this, "state", REJECTED);
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schedule(_this.observers.map(function (observer) {
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return {
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handler: observer.onreject,
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value: _this.value
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};
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}));
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raiseUnhandledPromiseRejectionException(_this.value, _this);
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};
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try {
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executor(resolve, reject);
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} catch (error) {
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reject(error);
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}
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}
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_createClass(Promifill, [{
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key: "then",
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value: function then(onfulfill, onreject) {
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var _this2 = this;
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var chainedPromise = new this.constructor(function (resolve, reject) {
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var internalOnfulfill = function internalOnfulfill(value) {
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try {
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resolve(typeof onfulfill == "function" ? onfulfill(value) : value);
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} catch (error) {
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reject(error);
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}
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};
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var internalOnreject = function internalOnreject(reason) {
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try {
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if (typeof onreject == "function") {
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resolve(onreject(reason));
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} else {
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reject(reason);
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}
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} catch (error) {
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reject(error);
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}
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};
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if (_this2.state === PENDING) {
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_this2.observers.push({
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onfulfill: internalOnfulfill,
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onreject: internalOnreject
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});
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} else {
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schedule([{
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handler: _this2.state === FULFILLED ? internalOnfulfill : internalOnreject,
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value: _this2.value
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}]);
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}
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});
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this.chain.push(chainedPromise);
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return chainedPromise;
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}
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}, {
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key: "catch",
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value: function _catch(onreject) {
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return this.then(null, onreject);
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}
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}, {
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key: "finally",
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value: function _finally(oncomplete) {
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var _this3 = this;
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var chainedPromise = new this.constructor(function (resolve, reject) {
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var internalOncomplete = function internalOncomplete() {
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try {
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oncomplete();
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if (_this3.state === FULFILLED) {
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resolve(_this3.value);
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} else {
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reject(_this3.value);
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}
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} catch (error) {
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reject(error);
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}
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};
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if (_this3.state === PENDING) {
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_this3.observers.push({
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onfulfill: internalOncomplete,
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onreject: internalOncomplete
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});
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} else {
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schedule([{
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handler: internalOncomplete
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}]);
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}
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});
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this.chain.push(chainedPromise);
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return chainedPromise;
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}
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}], [{
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key: "resolve",
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value: function resolve(value) {
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return value && value.constructor === Promifill ? value : new Promifill(function (resolve) {
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resolve(value);
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});
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}
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}, {
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key: "reject",
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value: function reject(reason) {
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return new Promifill(function (_, reject) {
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reject(reason);
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});
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}
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}, {
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key: "all",
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value: function all(iterable) {
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return new Promifill(function (resolve, reject) {
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validateIterable(iterable);
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var iterableSize = 0;
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var values = [];
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if (isEmptyIterable(iterable)) {
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return resolve(values);
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}
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var add = function add(value, index) {
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values[index] = value;
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if (values.filter(function () {
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return true;
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}).length === iterableSize) {
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resolve(values);
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}
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};
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var _iterator = _createForOfIteratorHelper(iterable),
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_step;
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try {
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for (_iterator.s(); !(_step = _iterator.n()).done;) {
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var item = _step.value;
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(function (entry, index) {
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Promifill.resolve(entry).then(function (value) {
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return add(value, index);
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}, reject);
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})(item, iterableSize++);
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}
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} catch (err) {
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_iterator.e(err);
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} finally {
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_iterator.f();
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}
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});
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}
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}, {
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key: "race",
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value: function race(iterable) {
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return new Promifill(function (resolve, reject) {
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validateIterable(iterable);
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if (isEmptyIterable(iterable)) {
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return;
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}
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var _iterator2 = _createForOfIteratorHelper(iterable),
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_step2;
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try {
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for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
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var entry = _step2.value;
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Promifill.resolve(entry).then(resolve, reject);
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}
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} catch (err) {
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_iterator2.e(err);
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} finally {
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_iterator2.f();
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}
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});
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}
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}, {
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key: "flushQueue",
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value: function flushQueue() {
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console.log("running promise sync by flushing queue");
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schedule.flushQueue();
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}
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}]);
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return Promifill;
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}();
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var defineProperty = function defineProperty(obj, propName, propValue) {
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Object.defineProperty(obj, propName, {
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value: propValue
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});
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};
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var defer = function defer(handler) {
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return function () {
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for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
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args[_key] = arguments[_key];
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}
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setTimeout.apply(void 0, [handler, 0].concat(args));
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};
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};
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var thrower = function thrower(error) {
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throw error instanceof Error ? error : new Error(error);
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};
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var raiseUnhandledPromiseRejectionException = defer(function (error, promise) {
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if (promise.preventThrow || promise.chain.length > 0) {
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return;
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}
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thrower(error);
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});
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var MutationObserverStrategy = /*#__PURE__*/function () {
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function MutationObserverStrategy(handler) {
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_classCallCheck(this, MutationObserverStrategy);
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var observer = new MutationObserver(handler);
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var node = this.node = document.createTextNode("");
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observer.observe(node, {
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characterData: true
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});
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}
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_createClass(MutationObserverStrategy, [{
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key: "trigger",
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value: function trigger() {
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this.node.data = this.node.data === 1 ? 0 : 1;
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}
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}]);
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return MutationObserverStrategy;
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}();
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var NextTickStrategy = /*#__PURE__*/function () {
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function NextTickStrategy(handler) {
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_classCallCheck(this, NextTickStrategy);
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this.scheduleNextTick = function () {
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return process.nextTick(handler);
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};
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}
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_createClass(NextTickStrategy, [{
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key: "trigger",
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value: function trigger() {
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this.scheduleNextTick();
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}
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}]);
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return NextTickStrategy;
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}();
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var BetterThanNothingStrategy = /*#__PURE__*/function () {
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function BetterThanNothingStrategy(handler) {
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_classCallCheck(this, BetterThanNothingStrategy);
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this.scheduleAsap = function () {
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return setTimeout(handler, 0);
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};
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}
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_createClass(BetterThanNothingStrategy, [{
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key: "trigger",
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value: function trigger() {
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this.scheduleAsap();
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}
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}]);
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return BetterThanNothingStrategy;
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}();
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var getStrategy = function getStrategy() {
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if (typeof window != "undefined" && typeof window.MutationObserver == "function") {
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return MutationObserverStrategy;
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}
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if (typeof global != "undefined" && typeof process != "undefined" && typeof process.nextTick == "function") {
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return NextTickStrategy;
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}
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return BetterThanNothingStrategy;
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};
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var schedule = function () {
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var microtasks = [];
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var run = function run() {
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var handler, value;
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while (microtasks.length > 0 && (_microtasks$shift = microtasks.shift(), handler = _microtasks$shift.handler, value = _microtasks$shift.value, _microtasks$shift)) {
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var _microtasks$shift;
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console.log("running handler with", value);
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handler(value);
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}
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};
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var Strategy = getStrategy();
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var ctrl = new Strategy(run);
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var scheduleFn = function scheduleFn(observers) {
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if (observers.length == 0) {
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return;
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}
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microtasks = microtasks.concat(observers);
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observers.length = 0;
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ctrl.trigger();
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};
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scheduleFn.flushQueue = function () {
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run();
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};
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return scheduleFn;
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}();
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var isIterable = function isIterable(subject) {
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return subject != null && typeof subject[Symbol.iterator] == "function";
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};
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var validateIterable = function validateIterable(subject) {
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if (isIterable(subject)) {
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return;
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}
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throw new TypeError("Cannot read property 'Symbol(Symbol.iterator)' of ".concat(Object.prototype.toString.call(subject), "."));
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};
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var isEmptyIterable = function isEmptyIterable(subject) {
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var _iterator3 = _createForOfIteratorHelper(subject),
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_step3;
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try {
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for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
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var _ = _step3.value;
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// eslint-disable-line no-unused-vars
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return false;
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}
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} catch (err) {
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_iterator3.e(err);
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} finally {
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_iterator3.f();
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}
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return true;
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};
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window.Promifill = Promifill;
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