# Code coverage report for RxJS/dist/cjs/operators/debounce.js

## Statements: 96% (96 / 100) Branches: 73.68% (28 / 38) Functions: 100% (23 / 23) Lines: 100% (78 / 78) Ignored: none

All files » RxJS/dist/cjs/operators/ » debounce.js

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    1'use strict';

    exports.__esModule = true;

    var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; Iif ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { Eif (protoProps) defineProperties(Constructor.prototype, protoProps); Iif (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

    exports['default'] = debounce;

    function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }

    function _inherits(subClass, superClass) { Iif (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); Eif (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

    function _classCallCheck(instance, Constructor) { Iif (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }

    var _observablesPromiseObservable = require('../observables/PromiseObservable');

    var _observablesPromiseObservable2 = _interopRequireDefault(_observablesPromiseObservable);

    var _Subscriber3 = require('../Subscriber');

    var _Subscriber4 = _interopRequireDefault(_Subscriber3);

    var _utilTryCatch = require('../util/tryCatch');

    var _utilTryCatch2 = _interopRequireDefault(_utilTryCatch);

    var _utilErrorObject = require('../util/errorObject');

    function debounce(durationSelector) {
        return this.lift(new DebounceOperator(durationSelector));
    }

    var DebounceOperator = (function () {
        function DebounceOperator(durationSelector) {
            _classCallCheck(this, DebounceOperator);

            this.durationSelector = durationSelector;
        }

        DebounceOperator.prototype.call = function call(observer) {
            return new DebounceSubscriber(observer, this.durationSelector);
        };

        return DebounceOperator;
    })();

    var DebounceSubscriber = (function (_Subscriber) {
        _inherits(DebounceSubscriber, _Subscriber);

        function DebounceSubscriber(destination, durationSelector) {
            _classCallCheck(this, DebounceSubscriber);

            _Subscriber.call(this, destination);
            this.durationSelector = durationSelector;
            this.debouncedSubscription = null;
            this.lastValue = null;
            this._index = 0;
        }

        DebounceSubscriber.prototype._next = function _next(value) {
            var destination = this.destination;
            var currentIndex = ++this._index;
            var debounce = _utilTryCatch2['default'](this.durationSelector)(value);
            if (debounce === _utilErrorObject.errorObject) {
                destination.error(_utilErrorObject.errorObject.e);
            } else {
                if (typeof debounce.subscribe !== 'function' && typeof debounce.then === 'function') {
                    debounce = _observablesPromiseObservable2['default'].create(debounce);
                }
                this.lastValue = value;
                this.add(this.debouncedSubscription = debounce._subscribe(new DurationSelectorSubscriber(this, currentIndex)));
            }
        };

        DebounceSubscriber.prototype._complete = function _complete() {
            this.debouncedNext();
            this.destination.complete();
        };

        DebounceSubscriber.prototype.debouncedNext = function debouncedNext() {
            this.clearDebounce();
            if (this.lastValue != null) {
                this.destination.next(this.lastValue);
                this.lastValue = null;
            }
        };

        DebounceSubscriber.prototype.clearDebounce = function clearDebounce() {
            var debouncedSubscription = this.debouncedSubscription;
            if (debouncedSubscription !== null) {
                this.remove(debouncedSubscription);
                this.debouncedSubscription = null;
            }
        };

        _createClass(DebounceSubscriber, [{
            key: 'index',
            get: function get() {
                return this._index;
            }
        }]);

        return DebounceSubscriber;
    })(_Subscriber4['default']);

    var DurationSelectorSubscriber = (function (_Subscriber2) {
        _inherits(DurationSelectorSubscriber, _Subscriber2);

        function DurationSelectorSubscriber(parent, currentIndex) {
            _classCallCheck(this, DurationSelectorSubscriber);

            _Subscriber2.call(this, null);
            this.parent = parent;
            this.currentIndex = currentIndex;
        }

        DurationSelectorSubscriber.prototype.debounceNext = function debounceNext() {
            var parent = this.parent;
            if (this.currentIndex === parent.index) {
                parent.debouncedNext();
                Eif (!this.isUnsubscribed) {
                    this.unsubscribe();
                }
            }
        };

        DurationSelectorSubscriber.prototype._next = function _next(unused) {
            this.debounceNext();
        };

        DurationSelectorSubscriber.prototype._error = function _error(err) {
            this.parent.error(err);
        };

        DurationSelectorSubscriber.prototype._complete = function _complete() {
            this.debounceNext();
        };

        return DurationSelectorSubscriber;
    })(_Subscriber4['default']);

    module.exports = exports['default'];