1 | /** PURE_IMPORTS_START tslib,_Subscriber,_util_ArgumentOutOfRangeError 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 | export function skipLast(count) {
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6 | return function (source) { return source.lift(new SkipLastOperator(count)); };
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7 | }
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8 | var SkipLastOperator = /*@__PURE__*/ (function () {
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9 | function SkipLastOperator(_skipCount) {
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10 | this._skipCount = _skipCount;
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11 | if (this._skipCount < 0) {
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12 | throw new ArgumentOutOfRangeError;
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13 | }
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14 | }
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15 | SkipLastOperator.prototype.call = function (subscriber, source) {
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16 | if (this._skipCount === 0) {
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17 | return source.subscribe(new Subscriber(subscriber));
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18 | }
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19 | else {
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20 | return source.subscribe(new SkipLastSubscriber(subscriber, this._skipCount));
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21 | }
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22 | };
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23 | return SkipLastOperator;
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24 | }());
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25 | var SkipLastSubscriber = /*@__PURE__*/ (function (_super) {
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26 | tslib_1.__extends(SkipLastSubscriber, _super);
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27 | function SkipLastSubscriber(destination, _skipCount) {
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28 | var _this = _super.call(this, destination) || this;
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29 | _this._skipCount = _skipCount;
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30 | _this._count = 0;
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31 | _this._ring = new Array(_skipCount);
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32 | return _this;
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33 | }
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34 | SkipLastSubscriber.prototype._next = function (value) {
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35 | var skipCount = this._skipCount;
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36 | var count = this._count++;
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37 | if (count < skipCount) {
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38 | this._ring[count] = value;
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39 | }
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40 | else {
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41 | var currentIndex = count % skipCount;
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42 | var ring = this._ring;
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43 | var oldValue = ring[currentIndex];
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44 | ring[currentIndex] = value;
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45 | this.destination.next(oldValue);
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46 | }
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47 | };
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48 | return SkipLastSubscriber;
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49 | }(Subscriber));
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50 | //# sourceMappingURL=skipLast.js.map
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