66 lines
2.3 KiB
JavaScript
66 lines
2.3 KiB
JavaScript
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"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 Subscriber_1 = require('../Subscriber');
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/**
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* Returns an Observable that skips all items emitted by the source Observable as long as a specified condition holds
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* true, but emits all further source items as soon as the condition becomes false.
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*
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* <img src="./img/skipWhile.png" width="100%">
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*
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* @param {Function} predicate - A function to test each item emitted from the source Observable.
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* @return {Observable<T>} An Observable that begins emitting items emitted by the source Observable when the
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* specified predicate becomes false.
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* @method skipWhile
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* @owner Observable
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*/
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function skipWhile(predicate) {
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return function (source) { return source.lift(new SkipWhileOperator(predicate)); };
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}
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exports.skipWhile = skipWhile;
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var SkipWhileOperator = (function () {
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function SkipWhileOperator(predicate) {
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this.predicate = predicate;
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}
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SkipWhileOperator.prototype.call = function (subscriber, source) {
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return source.subscribe(new SkipWhileSubscriber(subscriber, this.predicate));
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};
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return SkipWhileOperator;
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}());
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/**
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* We need this JSDoc comment for affecting ESDoc.
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* @ignore
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* @extends {Ignored}
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*/
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var SkipWhileSubscriber = (function (_super) {
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__extends(SkipWhileSubscriber, _super);
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function SkipWhileSubscriber(destination, predicate) {
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_super.call(this, destination);
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this.predicate = predicate;
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this.skipping = true;
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this.index = 0;
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}
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SkipWhileSubscriber.prototype._next = function (value) {
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var destination = this.destination;
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if (this.skipping) {
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this.tryCallPredicate(value);
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}
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if (!this.skipping) {
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destination.next(value);
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}
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};
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SkipWhileSubscriber.prototype.tryCallPredicate = function (value) {
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try {
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var result = this.predicate(value, this.index++);
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this.skipping = Boolean(result);
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}
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catch (err) {
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this.destination.error(err);
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}
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};
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return SkipWhileSubscriber;
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}(Subscriber_1.Subscriber));
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//# sourceMappingURL=skipWhile.js.map
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