| 1 | /** PURE_IMPORTS_START tslib,_Subscriber 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 | export function distinctUntilChanged(compare, keySelector) {
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| 5 | return function (source) { return source.lift(new DistinctUntilChangedOperator(compare, keySelector)); };
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| 6 | }
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| 7 | var DistinctUntilChangedOperator = /*@__PURE__*/ (function () {
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| 8 | function DistinctUntilChangedOperator(compare, keySelector) {
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| 9 | this.compare = compare;
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| 10 | this.keySelector = keySelector;
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| 11 | }
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| 12 | DistinctUntilChangedOperator.prototype.call = function (subscriber, source) {
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| 13 | return source.subscribe(new DistinctUntilChangedSubscriber(subscriber, this.compare, this.keySelector));
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| 14 | };
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| 15 | return DistinctUntilChangedOperator;
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| 16 | }());
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| 17 | var DistinctUntilChangedSubscriber = /*@__PURE__*/ (function (_super) {
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| 18 | tslib_1.__extends(DistinctUntilChangedSubscriber, _super);
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| 19 | function DistinctUntilChangedSubscriber(destination, compare, keySelector) {
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| 20 | var _this = _super.call(this, destination) || this;
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| 21 | _this.keySelector = keySelector;
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| 22 | _this.hasKey = false;
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| 23 | if (typeof compare === 'function') {
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| 24 | _this.compare = compare;
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| 25 | }
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| 26 | return _this;
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| 27 | }
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| 28 | DistinctUntilChangedSubscriber.prototype.compare = function (x, y) {
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| 29 | return x === y;
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| 30 | };
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| 31 | DistinctUntilChangedSubscriber.prototype._next = function (value) {
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| 32 | var key;
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| 33 | try {
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| 34 | var keySelector = this.keySelector;
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| 35 | key = keySelector ? keySelector(value) : value;
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| 36 | }
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| 37 | catch (err) {
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| 38 | return this.destination.error(err);
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| 39 | }
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| 40 | var result = false;
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| 41 | if (this.hasKey) {
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| 42 | try {
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| 43 | var compare = this.compare;
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| 44 | result = compare(this.key, key);
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| 45 | }
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| 46 | catch (err) {
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| 47 | return this.destination.error(err);
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| 48 | }
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| 49 | }
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| 50 | else {
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| 51 | this.hasKey = true;
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| 52 | }
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| 53 | if (!result) {
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| 54 | this.key = key;
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| 55 | this.destination.next(value);
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| 56 | }
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| 57 | };
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| 58 | return DistinctUntilChangedSubscriber;
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| 59 | }(Subscriber));
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| 60 | //# sourceMappingURL=distinctUntilChanged.js.map
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