101 lines
3.8 KiB
JavaScript
101 lines
3.8 KiB
JavaScript
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/** PURE_IMPORTS_START tslib,_util_subscribeToResult,_OuterSubscriber,_InnerSubscriber,_map,_observable_from PURE_IMPORTS_END */
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import * as tslib_1 from "tslib";
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import { subscribeToResult } from '../util/subscribeToResult';
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import { OuterSubscriber } from '../OuterSubscriber';
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import { InnerSubscriber } from '../InnerSubscriber';
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import { map } from './map';
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import { from } from '../observable/from';
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export function mergeMap(project, resultSelector, concurrent) {
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if (concurrent === void 0) {
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concurrent = Number.POSITIVE_INFINITY;
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}
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if (typeof resultSelector === 'function') {
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return function (source) { return source.pipe(mergeMap(function (a, i) { return from(project(a, i)).pipe(map(function (b, ii) { return resultSelector(a, b, i, ii); })); }, concurrent)); };
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}
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else if (typeof resultSelector === 'number') {
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concurrent = resultSelector;
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}
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return function (source) { return source.lift(new MergeMapOperator(project, concurrent)); };
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}
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var MergeMapOperator = /*@__PURE__*/ (function () {
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function MergeMapOperator(project, concurrent) {
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if (concurrent === void 0) {
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concurrent = Number.POSITIVE_INFINITY;
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}
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this.project = project;
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this.concurrent = concurrent;
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}
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MergeMapOperator.prototype.call = function (observer, source) {
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return source.subscribe(new MergeMapSubscriber(observer, this.project, this.concurrent));
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};
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return MergeMapOperator;
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}());
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export { MergeMapOperator };
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var MergeMapSubscriber = /*@__PURE__*/ (function (_super) {
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tslib_1.__extends(MergeMapSubscriber, _super);
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function MergeMapSubscriber(destination, project, concurrent) {
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if (concurrent === void 0) {
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concurrent = Number.POSITIVE_INFINITY;
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}
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var _this = _super.call(this, destination) || this;
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_this.project = project;
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_this.concurrent = concurrent;
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_this.hasCompleted = false;
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_this.buffer = [];
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_this.active = 0;
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_this.index = 0;
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return _this;
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}
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MergeMapSubscriber.prototype._next = function (value) {
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if (this.active < this.concurrent) {
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this._tryNext(value);
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}
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else {
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this.buffer.push(value);
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}
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};
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MergeMapSubscriber.prototype._tryNext = function (value) {
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var result;
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var index = this.index++;
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try {
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result = this.project(value, index);
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}
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catch (err) {
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this.destination.error(err);
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return;
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}
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this.active++;
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this._innerSub(result, value, index);
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};
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MergeMapSubscriber.prototype._innerSub = function (ish, value, index) {
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var innerSubscriber = new InnerSubscriber(this, undefined, undefined);
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var destination = this.destination;
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destination.add(innerSubscriber);
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subscribeToResult(this, ish, value, index, innerSubscriber);
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};
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MergeMapSubscriber.prototype._complete = function () {
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this.hasCompleted = true;
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if (this.active === 0 && this.buffer.length === 0) {
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this.destination.complete();
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}
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this.unsubscribe();
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};
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MergeMapSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
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this.destination.next(innerValue);
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};
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MergeMapSubscriber.prototype.notifyComplete = function (innerSub) {
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var buffer = this.buffer;
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this.remove(innerSub);
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this.active--;
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if (buffer.length > 0) {
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this._next(buffer.shift());
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}
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else if (this.active === 0 && this.hasCompleted) {
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this.destination.complete();
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}
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};
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return MergeMapSubscriber;
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}(OuterSubscriber));
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export { MergeMapSubscriber };
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//# sourceMappingURL=mergeMap.js.map
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