[6a3a178] | 1 | /** PURE_IMPORTS_START tslib,_Subscriber,_util_ArgumentOutOfRangeError,_observable_empty PURE_IMPORTS_END */
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| 2 | import * as tslib_1 from "tslib";
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| 3 | import { Subscriber } from '../Subscriber';
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| 4 | import { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';
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| 5 | import { empty } from '../observable/empty';
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| 6 | export function takeLast(count) {
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| 7 | return function takeLastOperatorFunction(source) {
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| 8 | if (count === 0) {
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| 9 | return empty();
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| 10 | }
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| 11 | else {
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| 12 | return source.lift(new TakeLastOperator(count));
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| 13 | }
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| 14 | };
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| 15 | }
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| 16 | var TakeLastOperator = /*@__PURE__*/ (function () {
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| 17 | function TakeLastOperator(total) {
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| 18 | this.total = total;
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| 19 | if (this.total < 0) {
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| 20 | throw new ArgumentOutOfRangeError;
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| 21 | }
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| 22 | }
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| 23 | TakeLastOperator.prototype.call = function (subscriber, source) {
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| 24 | return source.subscribe(new TakeLastSubscriber(subscriber, this.total));
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| 25 | };
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| 26 | return TakeLastOperator;
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| 27 | }());
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| 28 | var TakeLastSubscriber = /*@__PURE__*/ (function (_super) {
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| 29 | tslib_1.__extends(TakeLastSubscriber, _super);
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| 30 | function TakeLastSubscriber(destination, total) {
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| 31 | var _this = _super.call(this, destination) || this;
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| 32 | _this.total = total;
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| 33 | _this.ring = new Array();
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| 34 | _this.count = 0;
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| 35 | return _this;
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| 36 | }
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| 37 | TakeLastSubscriber.prototype._next = function (value) {
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| 38 | var ring = this.ring;
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| 39 | var total = this.total;
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| 40 | var count = this.count++;
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| 41 | if (ring.length < total) {
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| 42 | ring.push(value);
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| 43 | }
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| 44 | else {
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| 45 | var index = count % total;
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| 46 | ring[index] = value;
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| 47 | }
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| 48 | };
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| 49 | TakeLastSubscriber.prototype._complete = function () {
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| 50 | var destination = this.destination;
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| 51 | var count = this.count;
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| 52 | if (count > 0) {
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| 53 | var total = this.count >= this.total ? this.total : this.count;
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| 54 | var ring = this.ring;
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| 55 | for (var i = 0; i < total; i++) {
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| 56 | var idx = (count++) % total;
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| 57 | destination.next(ring[idx]);
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| 58 | }
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| 59 | }
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| 60 | destination.complete();
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| 61 | };
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| 62 | return TakeLastSubscriber;
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| 63 | }(Subscriber));
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| 64 | //# sourceMappingURL=takeLast.js.map
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