--- /dev/null
+"use strict";
+var __extends = (this && this.__extends) || (function () {
+ var extendStatics = function (d, b) {
+ extendStatics = Object.setPrototypeOf ||
+ ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+ function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+ return extendStatics(d, b);
+ }
+ return function (d, b) {
+ extendStatics(d, b);
+ function __() { this.constructor = d; }
+ d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+ };
+})();
+Object.defineProperty(exports, "__esModule", { value: true });
+var Subscriber_1 = require("../Subscriber");
+var ArgumentOutOfRangeError_1 = require("../util/ArgumentOutOfRangeError");
+var empty_1 = require("../observable/empty");
+function takeLast(count) {
+ return function takeLastOperatorFunction(source) {
+ if (count === 0) {
+ return empty_1.empty();
+ }
+ else {
+ return source.lift(new TakeLastOperator(count));
+ }
+ };
+}
+exports.takeLast = takeLast;
+var TakeLastOperator = (function () {
+ function TakeLastOperator(total) {
+ this.total = total;
+ if (this.total < 0) {
+ throw new ArgumentOutOfRangeError_1.ArgumentOutOfRangeError;
+ }
+ }
+ TakeLastOperator.prototype.call = function (subscriber, source) {
+ return source.subscribe(new TakeLastSubscriber(subscriber, this.total));
+ };
+ return TakeLastOperator;
+}());
+var TakeLastSubscriber = (function (_super) {
+ __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_1.Subscriber));
+//# sourceMappingURL=takeLast.js.map
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