throttle.js
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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.throttle = void 0;
var lift_1 = require("../util/lift");
var OperatorSubscriber_1 = require("./OperatorSubscriber");
var innerFrom_1 = require("../observable/innerFrom");
function throttle(durationSelector, config) {
return lift_1.operate(function (source, subscriber) {
var _a = config !== null && config !== void 0 ? config : {}, _b = _a.leading, leading = _b === void 0 ? true : _b, _c = _a.trailing, trailing = _c === void 0 ? false : _c;
var hasValue = false;
var sendValue = null;
var throttled = null;
var isComplete = false;
var endThrottling = function () {
throttled === null || throttled === void 0 ? void 0 : throttled.unsubscribe();
throttled = null;
if (trailing) {
send();
isComplete && subscriber.complete();
}
};
var cleanupThrottling = function () {
throttled = null;
isComplete && subscriber.complete();
};
var startThrottle = function (value) {
return (throttled = innerFrom_1.innerFrom(durationSelector(value)).subscribe(OperatorSubscriber_1.createOperatorSubscriber(subscriber, endThrottling, cleanupThrottling)));
};
var send = function () {
if (hasValue) {
hasValue = false;
var value = sendValue;
sendValue = null;
subscriber.next(value);
!isComplete && startThrottle(value);
}
};
source.subscribe(OperatorSubscriber_1.createOperatorSubscriber(subscriber, function (value) {
hasValue = true;
sendValue = value;
!(throttled && !throttled.closed) && (leading ? send() : startThrottle(value));
}, function () {
isComplete = true;
!(trailing && hasValue && throttled && !throttled.closed) && subscriber.complete();
}));
});
}
exports.throttle = throttle;
//# sourceMappingURL=throttle.js.map