Opal-Estate-Pro/node_modules/rxjs/operators/skipWhile.js
2019-09-13 11:27:52 +07:00

66 lines
2.3 KiB
JavaScript
Executable File

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