| /** PURE_IMPORTS_START tslib,_Subscriber PURE_IMPORTS_END */ |
| import * as tslib_1 from "tslib"; |
| import { Subscriber } from '../Subscriber'; |
| export function distinctUntilChanged(compare, keySelector) { |
| return function (source) { return source.lift(new DistinctUntilChangedOperator(compare, keySelector)); }; |
| } |
| var DistinctUntilChangedOperator = /*@__PURE__*/ (function () { |
| function DistinctUntilChangedOperator(compare, keySelector) { |
| this.compare = compare; |
| this.keySelector = keySelector; |
| } |
| DistinctUntilChangedOperator.prototype.call = function (subscriber, source) { |
| return source.subscribe(new DistinctUntilChangedSubscriber(subscriber, this.compare, this.keySelector)); |
| }; |
| return DistinctUntilChangedOperator; |
| }()); |
| var DistinctUntilChangedSubscriber = /*@__PURE__*/ (function (_super) { |
| tslib_1.__extends(DistinctUntilChangedSubscriber, _super); |
| function DistinctUntilChangedSubscriber(destination, compare, keySelector) { |
| var _this = _super.call(this, destination) || this; |
| _this.keySelector = keySelector; |
| _this.hasKey = false; |
| if (typeof compare === 'function') { |
| _this.compare = compare; |
| } |
| return _this; |
| } |
| DistinctUntilChangedSubscriber.prototype.compare = function (x, y) { |
| return x === y; |
| }; |
| DistinctUntilChangedSubscriber.prototype._next = function (value) { |
| var key; |
| try { |
| var keySelector = this.keySelector; |
| key = keySelector ? keySelector(value) : value; |
| } |
| catch (err) { |
| return this.destination.error(err); |
| } |
| var result = false; |
| if (this.hasKey) { |
| try { |
| var compare = this.compare; |
| result = compare(this.key, key); |
| } |
| catch (err) { |
| return this.destination.error(err); |
| } |
| } |
| else { |
| this.hasKey = true; |
| } |
| if (!result) { |
| this.key = key; |
| this.destination.next(value); |
| } |
| }; |
| return DistinctUntilChangedSubscriber; |
| }(Subscriber)); |
| //# sourceMappingURL=distinctUntilChanged.js.map |
