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node_modules/rxjs/observable/IntervalObservable.js

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+"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 isNumeric_1 = require('../util/isNumeric');
+var Observable_1 = require('../Observable');
+var async_1 = require('../scheduler/async');
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @extends {Ignored}
+ * @hide true
+ */
+var IntervalObservable = (function (_super) {
+    __extends(IntervalObservable, _super);
+    function IntervalObservable(period, scheduler) {
+        if (period === void 0) { period = 0; }
+        if (scheduler === void 0) { scheduler = async_1.async; }
+        _super.call(this);
+        this.period = period;
+        this.scheduler = scheduler;
+        if (!isNumeric_1.isNumeric(period) || period < 0) {
+            this.period = 0;
+        }
+        if (!scheduler || typeof scheduler.schedule !== 'function') {
+            this.scheduler = async_1.async;
+        }
+    }
+    /**
+     * Creates an Observable that emits sequential numbers every specified
+     * interval of time, on a specified IScheduler.
+     *
+     * <span class="informal">Emits incremental numbers periodically in time.
+     * </span>
+     *
+     * <img src="./img/interval.png" width="100%">
+     *
+     * `interval` returns an Observable that emits an infinite sequence of
+     * ascending integers, with a constant interval of time of your choosing
+     * between those emissions. The first emission is not sent immediately, but
+     * only after the first period has passed. By default, this operator uses the
+     * `async` IScheduler to provide a notion of time, but you may pass any
+     * IScheduler to it.
+     *
+     * @example <caption>Emits ascending numbers, one every second (1000ms)</caption>
+     * var numbers = Rx.Observable.interval(1000);
+     * numbers.subscribe(x => console.log(x));
+     *
+     * @see {@link timer}
+     * @see {@link delay}
+     *
+     * @param {number} [period=0] The interval size in milliseconds (by default)
+     * or the time unit determined by the scheduler's clock.
+     * @param {Scheduler} [scheduler=async] The IScheduler to use for scheduling
+     * the emission of values, and providing a notion of "time".
+     * @return {Observable} An Observable that emits a sequential number each time
+     * interval.
+     * @static true
+     * @name interval
+     * @owner Observable
+     */
+    IntervalObservable.create = function (period, scheduler) {
+        if (period === void 0) { period = 0; }
+        if (scheduler === void 0) { scheduler = async_1.async; }
+        return new IntervalObservable(period, scheduler);
+    };
+    IntervalObservable.dispatch = function (state) {
+        var index = state.index, subscriber = state.subscriber, period = state.period;
+        subscriber.next(index);
+        if (subscriber.closed) {
+            return;
+        }
+        state.index += 1;
+        this.schedule(state, period);
+    };
+    /** @deprecated internal use only */ IntervalObservable.prototype._subscribe = function (subscriber) {
+        var index = 0;
+        var period = this.period;
+        var scheduler = this.scheduler;
+        subscriber.add(scheduler.schedule(IntervalObservable.dispatch, period, {
+            index: index, subscriber: subscriber, period: period
+        }));
+    };
+    return IntervalObservable;
+}(Observable_1.Observable));
+exports.IntervalObservable = IntervalObservable;
+//# sourceMappingURL=IntervalObservable.js.map