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hydrogen-web/prototypes/promifill.js

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"use strict";
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; } } }; }
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); }
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; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
var PENDING = void 0,
FULFILLED = true,
REJECTED = false;
var Promifill = /*#__PURE__*/function () {
_createClass(Promifill, [{
key: "state",
get: function get() {
return PENDING;
}
}, {
key: "value",
get: function get() {
return void 0;
}
}, {
key: "settled",
get: function get() {
return false;
}
}]);
function Promifill(executor) {
var _this = this;
_classCallCheck(this, Promifill);
if (typeof executor != "function") {
throw new TypeError("Promise resolver ".concat(Object.prototype.toString.call(executor), " is not a function"));
}
defineProperty(this, "chain", []);
defineProperty(this, "observers", []);
var secret = [];
var resolve = function resolve(value, bypassKey) {
if (_this.settled && bypassKey !== secret) {
return;
}
defineProperty(_this, "settled", true);
var then_ = value && value.then;
var thenable = typeof then_ == "function";
if (thenable) {
defineProperty(value, "preventThrow", true);
}
if (thenable && value.state === PENDING) {
then_.call(value, function (v) {
return resolve(v, secret);
}, function (r) {
return reject(r, secret);
});
} else {
defineProperty(_this, "value", thenable ? value.value : value);
defineProperty(_this, "state", thenable ? value.state : FULFILLED);
schedule(_this.observers.map(function (observer) {
return {
handler: _this.state === FULFILLED ? observer.onfulfill : observer.onreject,
value: _this.value
};
}));
if (_this.state === REJECTED) {
raiseUnhandledPromiseRejectionException(_this.value, _this);
}
}
};
var reject = function reject(reason, bypassKey) {
if (_this.settled && bypassKey !== secret) {
return;
}
defineProperty(_this, "settled", true);
defineProperty(_this, "value", reason);
defineProperty(_this, "state", REJECTED);
schedule(_this.observers.map(function (observer) {
return {
handler: observer.onreject,
value: _this.value
};
}));
raiseUnhandledPromiseRejectionException(_this.value, _this);
};
try {
executor(resolve, reject);
} catch (error) {
reject(error);
}
}
_createClass(Promifill, [{
key: "then",
value: function then(onfulfill, onreject) {
var _this2 = this;
var chainedPromise = new this.constructor(function (resolve, reject) {
var internalOnfulfill = function internalOnfulfill(value) {
try {
resolve(typeof onfulfill == "function" ? onfulfill(value) : value);
} catch (error) {
reject(error);
}
};
var internalOnreject = function internalOnreject(reason) {
try {
if (typeof onreject == "function") {
resolve(onreject(reason));
} else {
reject(reason);
}
} catch (error) {
reject(error);
}
};
if (_this2.state === PENDING) {
_this2.observers.push({
onfulfill: internalOnfulfill,
onreject: internalOnreject
});
} else {
schedule([{
handler: _this2.state === FULFILLED ? internalOnfulfill : internalOnreject,
value: _this2.value
}]);
}
});
this.chain.push(chainedPromise);
return chainedPromise;
}
}, {
key: "catch",
value: function _catch(onreject) {
return this.then(null, onreject);
}
}, {
key: "finally",
value: function _finally(oncomplete) {
var _this3 = this;
var chainedPromise = new this.constructor(function (resolve, reject) {
var internalOncomplete = function internalOncomplete() {
try {
oncomplete();
if (_this3.state === FULFILLED) {
resolve(_this3.value);
} else {
reject(_this3.value);
}
} catch (error) {
reject(error);
}
};
if (_this3.state === PENDING) {
_this3.observers.push({
onfulfill: internalOncomplete,
onreject: internalOncomplete
});
} else {
schedule([{
handler: internalOncomplete
}]);
}
});
this.chain.push(chainedPromise);
return chainedPromise;
}
}], [{
key: "resolve",
value: function resolve(value) {
return value && value.constructor === Promifill ? value : new Promifill(function (resolve) {
resolve(value);
});
}
}, {
key: "reject",
value: function reject(reason) {
return new Promifill(function (_, reject) {
reject(reason);
});
}
}, {
key: "all",
value: function all(iterable) {
return new Promifill(function (resolve, reject) {
validateIterable(iterable);
var iterableSize = 0;
var values = [];
if (isEmptyIterable(iterable)) {
return resolve(values);
}
var add = function add(value, index) {
values[index] = value;
if (values.filter(function () {
return true;
}).length === iterableSize) {
resolve(values);
}
};
var _iterator = _createForOfIteratorHelper(iterable),
_step;
try {
for (_iterator.s(); !(_step = _iterator.n()).done;) {
var item = _step.value;
(function (entry, index) {
Promifill.resolve(entry).then(function (value) {
return add(value, index);
}, reject);
})(item, iterableSize++);
}
} catch (err) {
_iterator.e(err);
} finally {
_iterator.f();
}
});
}
}, {
key: "race",
value: function race(iterable) {
return new Promifill(function (resolve, reject) {
validateIterable(iterable);
if (isEmptyIterable(iterable)) {
return;
}
var _iterator2 = _createForOfIteratorHelper(iterable),
_step2;
try {
for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
var entry = _step2.value;
Promifill.resolve(entry).then(resolve, reject);
}
} catch (err) {
_iterator2.e(err);
} finally {
_iterator2.f();
}
});
}
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}, {
key: "flushQueue",
value: function flushQueue() {
console.log("running promise sync by flushing queue");
schedule.flushQueue();
}
}]);
return Promifill;
}();
var defineProperty = function defineProperty(obj, propName, propValue) {
Object.defineProperty(obj, propName, {
value: propValue
});
};
var defer = function defer(handler) {
return function () {
for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
setTimeout.apply(void 0, [handler, 0].concat(args));
};
};
var thrower = function thrower(error) {
throw error instanceof Error ? error : new Error(error);
};
var raiseUnhandledPromiseRejectionException = defer(function (error, promise) {
if (promise.preventThrow || promise.chain.length > 0) {
return;
}
thrower(error);
});
var MutationObserverStrategy = /*#__PURE__*/function () {
function MutationObserverStrategy(handler) {
_classCallCheck(this, MutationObserverStrategy);
var observer = new MutationObserver(handler);
var node = this.node = document.createTextNode("");
observer.observe(node, {
characterData: true
});
}
_createClass(MutationObserverStrategy, [{
key: "trigger",
value: function trigger() {
this.node.data = this.node.data === 1 ? 0 : 1;
}
}]);
return MutationObserverStrategy;
}();
var NextTickStrategy = /*#__PURE__*/function () {
function NextTickStrategy(handler) {
_classCallCheck(this, NextTickStrategy);
this.scheduleNextTick = function () {
return process.nextTick(handler);
};
}
_createClass(NextTickStrategy, [{
key: "trigger",
value: function trigger() {
this.scheduleNextTick();
}
}]);
return NextTickStrategy;
}();
var BetterThanNothingStrategy = /*#__PURE__*/function () {
function BetterThanNothingStrategy(handler) {
_classCallCheck(this, BetterThanNothingStrategy);
this.scheduleAsap = function () {
return setTimeout(handler, 0);
};
}
_createClass(BetterThanNothingStrategy, [{
key: "trigger",
value: function trigger() {
this.scheduleAsap();
}
}]);
return BetterThanNothingStrategy;
}();
var getStrategy = function getStrategy() {
if (typeof window != "undefined" && typeof window.MutationObserver == "function") {
return MutationObserverStrategy;
}
if (typeof global != "undefined" && typeof process != "undefined" && typeof process.nextTick == "function") {
return NextTickStrategy;
}
return BetterThanNothingStrategy;
};
var schedule = function () {
var microtasks = [];
var run = function run() {
var handler, value;
while (microtasks.length > 0 && (_microtasks$shift = microtasks.shift(), handler = _microtasks$shift.handler, value = _microtasks$shift.value, _microtasks$shift)) {
var _microtasks$shift;
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console.log("running handler with", value);
handler(value);
}
};
var Strategy = getStrategy();
var ctrl = new Strategy(run);
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var scheduleFn = function scheduleFn(observers) {
if (observers.length == 0) {
return;
}
microtasks = microtasks.concat(observers);
observers.length = 0;
ctrl.trigger();
};
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scheduleFn.flushQueue = function () {
run();
};
return scheduleFn;
}();
var isIterable = function isIterable(subject) {
return subject != null && typeof subject[Symbol.iterator] == "function";
};
var validateIterable = function validateIterable(subject) {
if (isIterable(subject)) {
return;
}
throw new TypeError("Cannot read property 'Symbol(Symbol.iterator)' of ".concat(Object.prototype.toString.call(subject), "."));
};
var isEmptyIterable = function isEmptyIterable(subject) {
var _iterator3 = _createForOfIteratorHelper(subject),
_step3;
try {
for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
var _ = _step3.value;
// eslint-disable-line no-unused-vars
return false;
}
} catch (err) {
_iterator3.e(err);
} finally {
_iterator3.f();
}
return true;
};
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window.Promifill = Promifill;