99 lines
3.6 KiB
JavaScript
99 lines
3.6 KiB
JavaScript
"use strict";
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var __extends = (this && this.__extends) || function (d, b) {
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for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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var Observable_1 = require('../Observable');
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var Subscriber_1 = require('../Subscriber');
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var PromiseObservable_1 = require('./PromiseObservable');
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var EmptyObservable_1 = require('./EmptyObservable');
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var isPromise_1 = require('../util/isPromise');
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var isArray_1 = require('../util/isArray');
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var ForkJoinObservable = (function (_super) {
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__extends(ForkJoinObservable, _super);
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function ForkJoinObservable(sources, resultSelector) {
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_super.call(this);
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this.sources = sources;
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this.resultSelector = resultSelector;
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}
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ForkJoinObservable.create = function () {
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var sources = [];
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for (var _i = 0; _i < arguments.length; _i++) {
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sources[_i - 0] = arguments[_i];
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}
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if (sources === null || arguments.length === 0) {
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return new EmptyObservable_1.EmptyObservable();
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}
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var resultSelector = null;
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if (typeof sources[sources.length - 1] === 'function') {
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resultSelector = sources.pop();
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}
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// if the first and only other argument besides the resultSelector is an array
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// assume it's been called with `forkJoin([obs1, obs2, obs3], resultSelector)`
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if (sources.length === 1 && isArray_1.isArray(sources[0])) {
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sources = sources[0];
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}
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if (sources.length === 0) {
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return new EmptyObservable_1.EmptyObservable();
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}
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return new ForkJoinObservable(sources, resultSelector);
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};
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ForkJoinObservable.prototype._subscribe = function (subscriber) {
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var sources = this.sources;
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var len = sources.length;
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var context = { completed: 0, total: len, values: emptyArray(len), selector: this.resultSelector };
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for (var i = 0; i < len; i++) {
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var source = sources[i];
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if (isPromise_1.isPromise(source)) {
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source = new PromiseObservable_1.PromiseObservable(source);
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}
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source.subscribe(new AllSubscriber(subscriber, i, context));
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}
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};
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return ForkJoinObservable;
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}(Observable_1.Observable));
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exports.ForkJoinObservable = ForkJoinObservable;
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var AllSubscriber = (function (_super) {
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__extends(AllSubscriber, _super);
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function AllSubscriber(destination, index, context) {
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_super.call(this, destination);
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this.index = index;
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this.context = context;
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this._value = null;
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}
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AllSubscriber.prototype._next = function (value) {
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this._value = value;
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};
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AllSubscriber.prototype._complete = function () {
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var destination = this.destination;
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if (this._value == null) {
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destination.complete();
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}
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var context = this.context;
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context.completed++;
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context.values[this.index] = this._value;
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var values = context.values;
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if (context.completed !== values.length) {
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return;
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}
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if (values.every(hasValue)) {
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var value = context.selector ? context.selector.apply(this, values) :
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values;
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destination.next(value);
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}
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destination.complete();
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};
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return AllSubscriber;
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}(Subscriber_1.Subscriber));
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function hasValue(x) {
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return x !== null;
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}
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function emptyArray(len) {
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var arr = [];
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for (var i = 0; i < len; i++) {
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arr.push(null);
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}
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return arr;
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}
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//# sourceMappingURL=ForkJoinObservable.js.map
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