# Code coverage report for RxJS/dist/cjs/operators/mergeMap-support.js

## Statements: 94.94% (75 / 79) Branches: 76.19% (32 / 42) Functions: 100% (13 / 13) Lines: 97.18% (69 / 71) Ignored: none

All files » RxJS/dist/cjs/operators/ » mergeMap-support.js

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    1'use strict';

    exports.__esModule = true;

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

    var _utilTryCatch2 = _interopRequireDefault(_utilTryCatch);

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

    var _utilSubscribeToResult = require('../util/subscribeToResult');

    var _utilSubscribeToResult2 = _interopRequireDefault(_utilSubscribeToResult);

    var _OuterSubscriber2 = require('../OuterSubscriber');

    var _OuterSubscriber3 = _interopRequireDefault(_OuterSubscriber2);

    var MergeMapOperator = (function () {
        function MergeMapOperator(project, resultSelector) {
            var concurrent = arguments.length <= 2 || arguments[2] === undefined ? Number.POSITIVE_INFINITY : arguments[2];

            _classCallCheck(this, MergeMapOperator);

            this.project = project;
            this.resultSelector = resultSelector;
            this.concurrent = concurrent;
        }

        MergeMapOperator.prototype.call = function call(observer) {
            return new MergeMapSubscriber(observer, this.project, this.resultSelector, this.concurrent);
        };

        return MergeMapOperator;
    })();

    exports.MergeMapOperator = MergeMapOperator;

    var MergeMapSubscriber = (function (_OuterSubscriber) {
        _inherits(MergeMapSubscriber, _OuterSubscriber);

        function MergeMapSubscriber(destination, project, resultSelector) {
            var concurrent = arguments.length <= 3 || arguments[3] === undefined ? Number.POSITIVE_INFINITY : arguments[3];

            _classCallCheck(this, MergeMapSubscriber);

            _OuterSubscriber.call(this, destination);
            this.project = project;
            this.resultSelector = resultSelector;
            this.concurrent = concurrent;
            this.hasCompleted = false;
            this.buffer = [];
            this.active = 0;
            this.index = 0;
        }

        MergeMapSubscriber.prototype._next = function _next(value) {
            Eif (this.active < this.concurrent) {
                var resultSelector = this.resultSelector;
                var index = this.index++;
                var ish = _utilTryCatch2['default'](this.project)(value, index);
                var destination = this.destination;
                if (ish === _utilErrorObject.errorObject) {
                    destination.error(ish.e);
                } else {
                    this.active++;
                    this._innerSub(ish, value, index);
                }
            } else {
                this.buffer.push(value);
            }
        };

        MergeMapSubscriber.prototype._innerSub = function _innerSub(ish, value, index) {
            this.add(_utilSubscribeToResult2['default'](this, ish, value, index));
        };

        MergeMapSubscriber.prototype._complete = function _complete() {
            this.hasCompleted = true;
            if (this.active === 0 && this.buffer.length === 0) {
                this.destination.complete();
            }
        };

        MergeMapSubscriber.prototype.notifyNext = function notifyNext(outerValue, innerValue, outerIndex, innerIndex) {
            var destination = this.destination;
            var resultSelector = this.resultSelector;

            if (resultSelector) {
                var result = _utilTryCatch2['default'](resultSelector)(outerValue, innerValue, outerIndex, innerIndex);
                if (result === _utilErrorObject.errorObject) {
                    destination.error(_utilErrorObject.errorObject.e);
                } else {
                    destination.next(result);
                }
            } else {
                destination.next(innerValue);
            }
        };

        MergeMapSubscriber.prototype.notifyComplete = function notifyComplete(innerSub) {
            var buffer = this.buffer;
            this.remove(innerSub);
            this.active--;
            Iif (buffer.length > 0) {
                this._next(buffer.shift());
            } else if (this.active === 0 && this.hasCompleted) {
                this.destination.complete();
            }
        };

        return MergeMapSubscriber;
    })(_OuterSubscriber3['default']);

    exports.MergeMapSubscriber = MergeMapSubscriber;