74 lines
2.7 KiB
JavaScript
74 lines
2.7 KiB
JavaScript
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"use strict";
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
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return extendStatics(d, b);
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}
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return function (d, b) {
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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Object.defineProperty(exports, "__esModule", { value: true });
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var Subscriber_1 = require("../Subscriber");
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function distinctUntilChanged(compare, keySelector) {
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return function (source) { return source.lift(new DistinctUntilChangedOperator(compare, keySelector)); };
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}
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exports.distinctUntilChanged = distinctUntilChanged;
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var DistinctUntilChangedOperator = (function () {
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function DistinctUntilChangedOperator(compare, keySelector) {
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this.compare = compare;
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this.keySelector = keySelector;
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}
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DistinctUntilChangedOperator.prototype.call = function (subscriber, source) {
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return source.subscribe(new DistinctUntilChangedSubscriber(subscriber, this.compare, this.keySelector));
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};
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return DistinctUntilChangedOperator;
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}());
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var DistinctUntilChangedSubscriber = (function (_super) {
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__extends(DistinctUntilChangedSubscriber, _super);
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function DistinctUntilChangedSubscriber(destination, compare, keySelector) {
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var _this = _super.call(this, destination) || this;
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_this.keySelector = keySelector;
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_this.hasKey = false;
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if (typeof compare === 'function') {
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_this.compare = compare;
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}
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return _this;
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}
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DistinctUntilChangedSubscriber.prototype.compare = function (x, y) {
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return x === y;
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};
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DistinctUntilChangedSubscriber.prototype._next = function (value) {
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var key;
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try {
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var keySelector = this.keySelector;
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key = keySelector ? keySelector(value) : value;
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}
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catch (err) {
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return this.destination.error(err);
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}
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var result = false;
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if (this.hasKey) {
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try {
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var compare = this.compare;
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result = compare(this.key, key);
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}
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catch (err) {
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return this.destination.error(err);
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}
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}
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else {
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this.hasKey = true;
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}
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if (!result) {
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this.key = key;
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this.destination.next(value);
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}
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};
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return DistinctUntilChangedSubscriber;
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}(Subscriber_1.Subscriber));
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//# sourceMappingURL=distinctUntilChanged.js.map
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