75 lines
3.1 KiB
JavaScript
75 lines
3.1 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.combineLatestInit = exports.combineLatest = void 0;
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var Observable_1 = require("../Observable");
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var argsArgArrayOrObject_1 = require("../util/argsArgArrayOrObject");
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var from_1 = require("./from");
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var identity_1 = require("../util/identity");
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var mapOneOrManyArgs_1 = require("../util/mapOneOrManyArgs");
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var args_1 = require("../util/args");
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var createObject_1 = require("../util/createObject");
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var OperatorSubscriber_1 = require("../operators/OperatorSubscriber");
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var executeSchedule_1 = require("../util/executeSchedule");
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function combineLatest() {
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var args = [];
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for (var _i = 0; _i < arguments.length; _i++) {
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args[_i] = arguments[_i];
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}
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var scheduler = args_1.popScheduler(args);
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var resultSelector = args_1.popResultSelector(args);
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var _a = argsArgArrayOrObject_1.argsArgArrayOrObject(args), observables = _a.args, keys = _a.keys;
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if (observables.length === 0) {
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return from_1.from([], scheduler);
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}
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var result = new Observable_1.Observable(combineLatestInit(observables, scheduler, keys
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?
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function (values) { return createObject_1.createObject(keys, values); }
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:
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identity_1.identity));
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return resultSelector ? result.pipe(mapOneOrManyArgs_1.mapOneOrManyArgs(resultSelector)) : result;
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}
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exports.combineLatest = combineLatest;
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function combineLatestInit(observables, scheduler, valueTransform) {
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if (valueTransform === void 0) { valueTransform = identity_1.identity; }
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return function (subscriber) {
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maybeSchedule(scheduler, function () {
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var length = observables.length;
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var values = new Array(length);
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var active = length;
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var remainingFirstValues = length;
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var _loop_1 = function (i) {
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maybeSchedule(scheduler, function () {
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var source = from_1.from(observables[i], scheduler);
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var hasFirstValue = false;
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source.subscribe(OperatorSubscriber_1.createOperatorSubscriber(subscriber, function (value) {
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values[i] = value;
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if (!hasFirstValue) {
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hasFirstValue = true;
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remainingFirstValues--;
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}
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if (!remainingFirstValues) {
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subscriber.next(valueTransform(values.slice()));
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}
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}, function () {
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if (!--active) {
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subscriber.complete();
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}
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}));
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}, subscriber);
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};
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for (var i = 0; i < length; i++) {
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_loop_1(i);
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}
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}, subscriber);
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};
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}
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exports.combineLatestInit = combineLatestInit;
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function maybeSchedule(scheduler, execute, subscription) {
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if (scheduler) {
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executeSchedule_1.executeSchedule(subscription, scheduler, execute);
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}
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else {
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execute();
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}
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}
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//# sourceMappingURL=combineLatest.js.map
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