work.suroh.tk/node_modules/rxjs/_esm5/observable/PairsObservable.js

87 lines
2.9 KiB
JavaScript

/** PURE_IMPORTS_START .._Observable PURE_IMPORTS_END */
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 __());
};
import { Observable } from '../Observable';
function dispatch(state) {
var obj = state.obj, keys = state.keys, length = state.length, index = state.index, subscriber = state.subscriber;
if (index === length) {
subscriber.complete();
return;
}
var key = keys[index];
subscriber.next([key, obj[key]]);
state.index = index + 1;
this.schedule(state);
}
/**
* We need this JSDoc comment for affecting ESDoc.
* @extends {Ignored}
* @hide true
*/
export var PairsObservable = /*@__PURE__*/ (/*@__PURE__*/ function (_super) {
__extends(PairsObservable, _super);
function PairsObservable(obj, scheduler) {
_super.call(this);
this.obj = obj;
this.scheduler = scheduler;
this.keys = Object.keys(obj);
}
/**
* Convert an object into an observable sequence of [key, value] pairs
* using an optional IScheduler to enumerate the object.
*
* @example <caption>Converts a javascript object to an Observable</caption>
* var obj = {
* foo: 42,
* bar: 56,
* baz: 78
* };
*
* var source = Rx.Observable.pairs(obj);
*
* var subscription = source.subscribe(
* function (x) {
* console.log('Next: %s', x);
* },
* function (err) {
* console.log('Error: %s', err);
* },
* function () {
* console.log('Completed');
* });
*
* @param {Object} obj The object to inspect and turn into an
* Observable sequence.
* @param {Scheduler} [scheduler] An optional IScheduler to run the
* enumeration of the input sequence on.
* @returns {(Observable<Array<string | T>>)} An observable sequence of
* [key, value] pairs from the object.
*/
PairsObservable.create = function (obj, scheduler) {
return new PairsObservable(obj, scheduler);
};
/** @deprecated internal use only */ PairsObservable.prototype._subscribe = function (subscriber) {
var _a = this, keys = _a.keys, scheduler = _a.scheduler;
var length = keys.length;
if (scheduler) {
return scheduler.schedule(dispatch, 0, {
obj: this.obj, keys: keys, length: length, index: 0, subscriber: subscriber
});
}
else {
for (var idx = 0; idx < length; idx++) {
var key = keys[idx];
subscriber.next([key, this.obj[key]]);
}
subscriber.complete();
}
};
return PairsObservable;
}(Observable));
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