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

## Statements: 95.65% (154 / 161) Branches: 78.57% (44 / 56) Functions: 93.75% (30 / 32) Lines: 96.73% (148 / 153) Ignored: none

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

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     '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 _Subscriber2 = require('../Subscriber');

    var _Subscriber3 = _interopRequireDefault(_Subscriber2);

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

    var _utilTryCatch2 = _interopRequireDefault(_utilTryCatch);

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

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

    var _OuterSubscriber3 = _interopRequireDefault(_OuterSubscriber2);

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

    var _utilSubscribeToResult2 = _interopRequireDefault(_utilSubscribeToResult);

    var _utilSymbol_iterator = require('../util/Symbol_iterator');

    var _utilSymbol_iterator2 = _interopRequireDefault(_utilSymbol_iterator);

    var isArray = Array.isArray;

    var ZipOperator = (function () {
        function ZipOperator(project) {
            _classCallCheck(this, ZipOperator);

            this.project = project;
        }

        ZipOperator.prototype.call = function call(subscriber) {
            return new ZipSubscriber(subscriber, this.project);
        };

        return ZipOperator;
    })();

    exports.ZipOperator = ZipOperator;

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

        function ZipSubscriber(destination, project) {
            var values = arguments.length <= 2 || arguments[2] === undefined ? Object.create(null) : arguments[2];

            _classCallCheck(this, ZipSubscriber);

            _Subscriber.call(this, destination);
            this.index = 0;
            this.iterators = [];
            this.active = 0;
            this.project = typeof project === 'function' ? project : null;
            this.values = values;
        }

        ZipSubscriber.prototype._next = function _next(value) {
            var iterators = this.iterators;
            var index = this.index++;
            if (isArray(value)) {
                iterators.push(new StaticArrayIterator(value));
            } else if (typeof value[_utilSymbol_iterator2['default']] === 'function') {
                iterators.push(new StaticIterator(value[_utilSymbol_iterator2['default']]()));
            } else {
                iterators.push(new ZipBufferIterator(this.destination, this, value, index));
            }
        };

        ZipSubscriber.prototype._complete = function _complete() {
            var values = this.values;
            var iterators = this.iterators;
            var len = iterators.length;
            this.active = len;
            for (var i = 0; i < len; i++) {
                var iterator = iterators[i];
                if (iterator.stillUnsubscribed) {
                    iterator.subscribe(iterator, i);
                } else {
                    this.active--; // not an observable
                }
            }
        };

        ZipSubscriber.prototype.notifyInactive = function notifyInactive() {
            this.active--;
            if (this.active === 0) {
                this.destination.complete();
            }
        };

        ZipSubscriber.prototype.checkIterators = function checkIterators() {
            var iterators = this.iterators;
            var len = iterators.length;
            var destination = this.destination;
            // abort if not all of them have values
            for (var i = 0; i < len; i++) {
                var iterator = iterators[i];
                if (typeof iterator.hasValue === 'function' && !iterator.hasValue()) {
                    return;
                }
            }
            var shouldComplete = false;
            var args = [];
            for (var i = 0; i < len; i++) {
                var iterator = iterators[i];
                var result = iterator.next();
                // check to see if it's completed now that you've gotten
                // the next value.
                if (iterator.hasCompleted()) {
                    shouldComplete = true;
                }
                Iif (result.done) {
                    destination.complete();
                    return;
                }
                args.push(result.value);
            }
            var project = this.project;
            if (project) {
                var result = _utilTryCatch2['default'](project).apply(this, args);
                if (result === _utilErrorObject.errorObject) {
                    destination.error(_utilErrorObject.errorObject.e);
                } else {
                    destination.next(result);
                }
            } else {
                destination.next(args);
            }
            if (shouldComplete) {
                destination.complete();
            }
        };

        return ZipSubscriber;
    })(_Subscriber3['default']);

    exports.ZipSubscriber = ZipSubscriber;

    var StaticIterator = (function () {
        function StaticIterator(iterator) {
            _classCallCheck(this, StaticIterator);

            this.iterator = iterator;
            this.nextResult = iterator.next();
        }

        StaticIterator.prototype.hasValue = function hasValue() {
            return true;
        };

        StaticIterator.prototype.next = function next() {
            var result = this.nextResult;
            this.nextResult = this.iterator.next();
            return result;
        };

        StaticIterator.prototype.hasCompleted = function hasCompleted() {
            var nextResult = this.nextResult;
            return nextResult && nextResult.done;
        };

        return StaticIterator;
    })();

    var StaticArrayIterator = (function () {
        function StaticArrayIterator(array) {
            _classCallCheck(this, StaticArrayIterator);

            this.array = array;
            this.index = 0;
            this.length = 0;
            this.length = array.length;
        }

        StaticArrayIterator.prototype[_utilSymbol_iterator2['default']] = function () {
            return this;
        };

        StaticArrayIterator.prototype.next = function next(value) {
            var i = this.index++;
            var array = this.array;
            return i < this.length ? { value: array[i], done: false } : { done: true };
        };

        StaticArrayIterator.prototype.hasValue = function hasValue() {
            return this.array.length > this.index;
        };

        StaticArrayIterator.prototype.hasCompleted = function hasCompleted() {
            return this.array.length === this.index;
        };

        return StaticArrayIterator;
    })();

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

        function ZipBufferIterator(destination, parent, observable, index) {
            _classCallCheck(this, ZipBufferIterator);

            _OuterSubscriber.call(this, destination);
            this.parent = parent;
            this.observable = observable;
            this.index = index;
            this.stillUnsubscribed = true;
            this.buffer = [];
            this.isComplete = false;
        }

        ZipBufferIterator.prototype[_utilSymbol_iterator2['default']] = function () {
            return this;
        };

        // NOTE: there is actually a name collision here with Subscriber.next and Iterator.next
        //    this is legit because `next()` will never be called by a subscription in this case.

        ZipBufferIterator.prototype.next = function next() {
            var buffer = this.buffer;
            Iif (buffer.length === 0 && this.isComplete) {
                return { done: true };
            } else {
                return { value: buffer.shift(), done: false };
            }
        };

        ZipBufferIterator.prototype.hasValue = function hasValue() {
            return this.buffer.length > 0;
        };

        ZipBufferIterator.prototype.hasCompleted = function hasCompleted() {
            return this.buffer.length === 0 && this.isComplete;
        };

        ZipBufferIterator.prototype.notifyComplete = function notifyComplete() {
            if (this.buffer.length > 0) {
                this.isComplete = true;
                this.parent.notifyInactive();
            } else {
                this.destination.complete();
            }
        };

        ZipBufferIterator.prototype.notifyNext = function notifyNext(outerValue, innerValue, outerIndex, innerIndex) {
            this.buffer.push(innerValue);
            this.parent.checkIterators();
        };

        ZipBufferIterator.prototype.subscribe = function subscribe(value, index) {
            this.add(_utilSubscribeToResult2['default'](this, this.observable, this, index));
        };

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