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keksAccountGUI/node_modulesOLD/rxjs/_esm5/internal/operators/takeLast.js
2019-08-11 20:48:02 +02:00

64 lines
2.1 KiB
JavaScript

/** PURE_IMPORTS_START tslib,_Subscriber,_util_ArgumentOutOfRangeError,_observable_empty PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { Subscriber } from '../Subscriber';
import { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';
import { empty } from '../observable/empty';
export function takeLast(count) {
return function takeLastOperatorFunction(source) {
if (count === 0) {
return empty();
}
else {
return source.lift(new TakeLastOperator(count));
}
};
}
var TakeLastOperator = /*@__PURE__*/ (function () {
function TakeLastOperator(total) {
this.total = total;
if (this.total < 0) {
throw new ArgumentOutOfRangeError;
}
}
TakeLastOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new TakeLastSubscriber(subscriber, this.total));
};
return TakeLastOperator;
}());
var TakeLastSubscriber = /*@__PURE__*/ (function (_super) {
tslib_1.__extends(TakeLastSubscriber, _super);
function TakeLastSubscriber(destination, total) {
var _this = _super.call(this, destination) || this;
_this.total = total;
_this.ring = new Array();
_this.count = 0;
return _this;
}
TakeLastSubscriber.prototype._next = function (value) {
var ring = this.ring;
var total = this.total;
var count = this.count++;
if (ring.length < total) {
ring.push(value);
}
else {
var index = count % total;
ring[index] = value;
}
};
TakeLastSubscriber.prototype._complete = function () {
var destination = this.destination;
var count = this.count;
if (count > 0) {
var total = this.count >= this.total ? this.total : this.count;
var ring = this.ring;
for (var i = 0; i < total; i++) {
var idx = (count++) % total;
destination.next(ring[idx]);
}
}
destination.complete();
};
return TakeLastSubscriber;
}(Subscriber));
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