@reactivex/rxjs/dist/cjs/observable/FromObservable.js

Reactive Extensions for modern JavaScript

"use strict";
var __extends = (this && this.__extends) || function (d, b) {
    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var isArray_1 = require('../util/isArray');
var isFunction_1 = require('../util/isFunction');
var isPromise_1 = require('../util/isPromise');
var isScheduler_1 = require('../util/isScheduler');
var PromiseObservable_1 = require('./PromiseObservable');
var IteratorObservable_1 = require('./IteratorObservable');
var ArrayObservable_1 = require('./ArrayObservable');
var ArrayLikeObservable_1 = require('./ArrayLikeObservable');
var observable_1 = require('../symbol/observable');
var iterator_1 = require('../symbol/iterator');
var Observable_1 = require('../Observable');
var observeOn_1 = require('../operator/observeOn');
var isArrayLike = (function (x) { return x && typeof x.length === 'number'; });
/**
 * We need this JSDoc comment for affecting ESDoc.
 * @extends {Ignored}
 * @hide true
 */
var FromObservable = (function (_super) {
    __extends(FromObservable, _super);
    function FromObservable(ish, scheduler) {
        _super.call(this, null);
        this.ish = ish;
        this.scheduler = scheduler;
    }
    FromObservable.create = function (ish, mapFnOrScheduler, thisArg, lastScheduler) {
        var scheduler = null;
        var mapFn = null;
        if (isFunction_1.isFunction(mapFnOrScheduler)) {
            scheduler = lastScheduler || null;
            mapFn = mapFnOrScheduler;
        }
        else if (isScheduler_1.isScheduler(scheduler)) {
            scheduler = mapFnOrScheduler;
        }
        if (ish != null) {
            if (typeof ish[observable_1.$$observable] === 'function') {
                if (ish instanceof Observable_1.Observable && !scheduler) {
                    return ish;
                }
                return new FromObservable(ish, scheduler);
            }
            else if (isArray_1.isArray(ish)) {
                return new ArrayObservable_1.ArrayObservable(ish, scheduler);
            }
            else if (isPromise_1.isPromise(ish)) {
                return new PromiseObservable_1.PromiseObservable(ish, scheduler);
            }
            else if (typeof ish[iterator_1.$$iterator] === 'function' || typeof ish === 'string') {
                return new IteratorObservable_1.IteratorObservable(ish, null, null, scheduler);
            }
            else if (isArrayLike(ish)) {
                return new ArrayLikeObservable_1.ArrayLikeObservable(ish, mapFn, thisArg, scheduler);
            }
        }
        throw new TypeError((ish !== null && typeof ish || ish) + ' is not observable');
    };
    FromObservable.prototype._subscribe = function (subscriber) {
        var ish = this.ish;
        var scheduler = this.scheduler;
        if (scheduler == null) {
            return ish[observable_1.$$observable]().subscribe(subscriber);
        }
        else {
            return ish[observable_1.$$observable]().subscribe(new observeOn_1.ObserveOnSubscriber(subscriber, scheduler, 0));
        }
    };
    return FromObservable;
}(Observable_1.Observable));
exports.FromObservable = FromObservable;
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