ArrayLikeObservable.js

"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 Observable_1 = require('../Observable');
var ScalarObservable_1 = require('./ScalarObservable');
var EmptyObservable_1 = require('./EmptyObservable');
/**
 * We need this JSDoc comment for affecting ESDoc.
 * @extends {Ignored}
 * @hide true
 */
var ArrayLikeObservable = (function (_super) {
    __extends(ArrayLikeObservable, _super);
    function ArrayLikeObservable(arrayLike, scheduler) {
        _super.call(this);
        this.arrayLike = arrayLike;
        this.scheduler = scheduler;
        if (!scheduler && arrayLike.length === 1) {
            this._isScalar = true;
            this.value = arrayLike[0];
        }
    }
    ArrayLikeObservable.create = function (arrayLike, scheduler) {
        var length = arrayLike.length;
        if (length === 0) {
            return new EmptyObservable_1.EmptyObservable();
        }
        else if (length === 1) {
            return new ScalarObservable_1.ScalarObservable(arrayLike[0], scheduler);
        }
        else {
            return new ArrayLikeObservable(arrayLike, scheduler);
        }
    };
    ArrayLikeObservable.dispatch = function (state) {
        var arrayLike = state.arrayLike, index = state.index, length = state.length, subscriber = state.subscriber;
        if (subscriber.closed) {
            return;
        }
        if (index >= length) {
            subscriber.complete();
            return;
        }
        subscriber.next(arrayLike[index]);
        state.index = index + 1;
        this.schedule(state);
    };
    ArrayLikeObservable.prototype._subscribe = function (subscriber) {
        var index = 0;
        var _a = this, arrayLike = _a.arrayLike, scheduler = _a.scheduler;
        var length = arrayLike.length;
        if (scheduler) {
            return scheduler.schedule(ArrayLikeObservable.dispatch, 0, {
                arrayLike: arrayLike, index: index, length: length, subscriber: subscriber
            });
        }
        else {
            for (var i = 0; i < length && !subscriber.closed; i++) {
                subscriber.next(arrayLike[i]);
            }
            subscriber.complete();
        }
    };
    return ArrayLikeObservable;
}(Observable_1.Observable));
exports.ArrayLikeObservable = ArrayLikeObservable;
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