| /** PURE_IMPORTS_START .._OuterSubscriber,.._util_subscribeToResult PURE_IMPORTS_END */ |
| var __extends = (this && this.__extends) || function (d, b) { |
| for (var p in b) |
| if (b.hasOwnProperty(p)) |
| d[p] = b[p]; |
| function __() { this.constructor = d; } |
| d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __()); |
| }; |
| import { OuterSubscriber } from '../OuterSubscriber'; |
| import { subscribeToResult } from '../util/subscribeToResult'; |
| /* tslint:enable:max-line-length */ |
| /** |
| * Projects each source value to the same Observable which is merged multiple |
| * times in the output Observable. |
| * |
| * <span class="informal">It's like {@link mergeMap}, but maps each value always |
| * to the same inner Observable.</span> |
| * |
| * <img src="./img/mergeMapTo.png" width="100%"> |
| * |
| * Maps each source value to the given Observable `innerObservable` regardless |
| * of the source value, and then merges those resulting Observables into one |
| * single Observable, which is the output Observable. |
| * |
| * @example <caption>For each click event, start an interval Observable ticking every 1 second</caption> |
| * var clicks = Rx.Observable.fromEvent(document, 'click'); |
| * var result = clicks.mergeMapTo(Rx.Observable.interval(1000)); |
| * result.subscribe(x => console.log(x)); |
| * |
| * @see {@link concatMapTo} |
| * @see {@link merge} |
| * @see {@link mergeAll} |
| * @see {@link mergeMap} |
| * @see {@link mergeScan} |
| * @see {@link switchMapTo} |
| * |
| * @param {ObservableInput} innerObservable An Observable to replace each value from |
| * the source Observable. |
| * @param {function(outerValue: T, innerValue: I, outerIndex: number, innerIndex: number): any} [resultSelector] |
| * A function to produce the value on the output Observable based on the values |
| * and the indices of the source (outer) emission and the inner Observable |
| * emission. The arguments passed to this function are: |
| * - `outerValue`: the value that came from the source |
| * - `innerValue`: the value that came from the projected Observable |
| * - `outerIndex`: the "index" of the value that came from the source |
| * - `innerIndex`: the "index" of the value from the projected Observable |
| * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of input |
| * Observables being subscribed to concurrently. |
| * @return {Observable} An Observable that emits items from the given |
| * `innerObservable` (and optionally transformed through `resultSelector`) every |
| * time a value is emitted on the source Observable. |
| * @method mergeMapTo |
| * @owner Observable |
| */ |
| export function mergeMapTo(innerObservable, resultSelector, concurrent) { |
| if (concurrent === void 0) { |
| concurrent = Number.POSITIVE_INFINITY; |
| } |
| if (typeof resultSelector === 'number') { |
| concurrent = resultSelector; |
| resultSelector = null; |
| } |
| return function (source) { return source.lift(new MergeMapToOperator(innerObservable, resultSelector, concurrent)); }; |
| } |
| // TODO: Figure out correct signature here: an Operator<Observable<T>, R> |
| // needs to implement call(observer: Subscriber<R>): Subscriber<Observable<T>> |
| export var MergeMapToOperator = /*@__PURE__*/ (/*@__PURE__*/ function () { |
| function MergeMapToOperator(ish, resultSelector, concurrent) { |
| if (concurrent === void 0) { |
| concurrent = Number.POSITIVE_INFINITY; |
| } |
| this.ish = ish; |
| this.resultSelector = resultSelector; |
| this.concurrent = concurrent; |
| } |
| MergeMapToOperator.prototype.call = function (observer, source) { |
| return source.subscribe(new MergeMapToSubscriber(observer, this.ish, this.resultSelector, this.concurrent)); |
| }; |
| return MergeMapToOperator; |
| }()); |
| /** |
| * We need this JSDoc comment for affecting ESDoc. |
| * @ignore |
| * @extends {Ignored} |
| */ |
| export var MergeMapToSubscriber = /*@__PURE__*/ (/*@__PURE__*/ function (_super) { |
| __extends(MergeMapToSubscriber, _super); |
| function MergeMapToSubscriber(destination, ish, resultSelector, concurrent) { |
| if (concurrent === void 0) { |
| concurrent = Number.POSITIVE_INFINITY; |
| } |
| _super.call(this, destination); |
| this.ish = ish; |
| this.resultSelector = resultSelector; |
| this.concurrent = concurrent; |
| this.hasCompleted = false; |
| this.buffer = []; |
| this.active = 0; |
| this.index = 0; |
| } |
| MergeMapToSubscriber.prototype._next = function (value) { |
| if (this.active < this.concurrent) { |
| var resultSelector = this.resultSelector; |
| var index = this.index++; |
| var ish = this.ish; |
| var destination = this.destination; |
| this.active++; |
| this._innerSub(ish, destination, resultSelector, value, index); |
| } |
| else { |
| this.buffer.push(value); |
| } |
| }; |
| MergeMapToSubscriber.prototype._innerSub = function (ish, destination, resultSelector, value, index) { |
| this.add(subscribeToResult(this, ish, value, index)); |
| }; |
| MergeMapToSubscriber.prototype._complete = function () { |
| this.hasCompleted = true; |
| if (this.active === 0 && this.buffer.length === 0) { |
| this.destination.complete(); |
| } |
| }; |
| MergeMapToSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) { |
| var _a = this, resultSelector = _a.resultSelector, destination = _a.destination; |
| if (resultSelector) { |
| this.trySelectResult(outerValue, innerValue, outerIndex, innerIndex); |
| } |
| else { |
| destination.next(innerValue); |
| } |
| }; |
| MergeMapToSubscriber.prototype.trySelectResult = function (outerValue, innerValue, outerIndex, innerIndex) { |
| var _a = this, resultSelector = _a.resultSelector, destination = _a.destination; |
| var result; |
| try { |
| result = resultSelector(outerValue, innerValue, outerIndex, innerIndex); |
| } |
| catch (err) { |
| destination.error(err); |
| return; |
| } |
| destination.next(result); |
| }; |
| MergeMapToSubscriber.prototype.notifyError = function (err) { |
| this.destination.error(err); |
| }; |
| MergeMapToSubscriber.prototype.notifyComplete = function (innerSub) { |
| var buffer = this.buffer; |
| this.remove(innerSub); |
| this.active--; |
| if (buffer.length > 0) { |
| this._next(buffer.shift()); |
| } |
| else if (this.active === 0 && this.hasCompleted) { |
| this.destination.complete(); |
| } |
| }; |
| return MergeMapToSubscriber; |
| }(OuterSubscriber)); |
| //# sourceMappingURL=mergeMapTo.js.map |