70 lines
2.7 KiB
JavaScript
70 lines
2.7 KiB
JavaScript
|
import { Observable } from '../Observable';
|
||
|
|
import { argsArgArrayOrObject } from '../util/argsArgArrayOrObject';
|
||
|
|
import { from } from './from';
|
||
|
|
import { identity } from '../util/identity';
|
||
|
|
import { mapOneOrManyArgs } from '../util/mapOneOrManyArgs';
|
||
|
|
import { popResultSelector, popScheduler } from '../util/args';
|
||
|
|
import { createObject } from '../util/createObject';
|
||
|
|
import { createOperatorSubscriber } from '../operators/OperatorSubscriber';
|
||
|
|
import { executeSchedule } from '../util/executeSchedule';
|
||
|
|
export function combineLatest() {
|
||
|
|
var args = [];
|
||
|
|
for (var _i = 0; _i < arguments.length; _i++) {
|
||
|
|
args[_i] = arguments[_i];
|
||
|
|
}
|
||
|
|
var scheduler = popScheduler(args);
|
||
|
|
var resultSelector = popResultSelector(args);
|
||
|
|
var _a = argsArgArrayOrObject(args), observables = _a.args, keys = _a.keys;
|
||
|
|
if (observables.length === 0) {
|
||
|
|
return from([], scheduler);
|
||
|
|
}
|
||
|
|
var result = new Observable(combineLatestInit(observables, scheduler, keys
|
||
|
|
?
|
||
|
|
function (values) { return createObject(keys, values); }
|
||
|
|
:
|
||
|
|
identity));
|
||
|
|
return resultSelector ? result.pipe(mapOneOrManyArgs(resultSelector)) : result;
|
||
|
|
}
|
||
|
|
export function combineLatestInit(observables, scheduler, valueTransform) {
|
||
|
|
if (valueTransform === void 0) { valueTransform = identity; }
|
||
|
|
return function (subscriber) {
|
||
|
|
maybeSchedule(scheduler, function () {
|
||
|
|
var length = observables.length;
|
||
|
|
var values = new Array(length);
|
||
|
|
var active = length;
|
||
|
|
var remainingFirstValues = length;
|
||
|
|
var _loop_1 = function (i) {
|
||
|
|
maybeSchedule(scheduler, function () {
|
||
|
|
var source = from(observables[i], scheduler);
|
||
|
|
var hasFirstValue = false;
|
||
|
|
source.subscribe(createOperatorSubscriber(subscriber, function (value) {
|
||
|
|
values[i] = value;
|
||
|
|
if (!hasFirstValue) {
|
||
|
|
hasFirstValue = true;
|
||
|
|
remainingFirstValues--;
|
||
|
|
}
|
||
|
|
if (!remainingFirstValues) {
|
||
|
|
subscriber.next(valueTransform(values.slice()));
|
||
|
|
}
|
||
|
|
}, function () {
|
||
|
|
if (!--active) {
|
||
|
|
subscriber.complete();
|
||
|
|
}
|
||
|
|
}));
|
||
|
|
}, subscriber);
|
||
|
|
};
|
||
|
|
for (var i = 0; i < length; i++) {
|
||
|
|
_loop_1(i);
|
||
|
|
}
|
||
|
|
}, subscriber);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
function maybeSchedule(scheduler, execute, subscription) {
|
||
|
|
if (scheduler) {
|
||
|
|
executeSchedule(subscription, scheduler, execute);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
execute();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=combineLatest.js.map
|