debounceTime.js
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import { asyncScheduler } from '../scheduler/async';
import { operate } from '../util/lift';
import { createOperatorSubscriber } from './OperatorSubscriber';
export function debounceTime(dueTime, scheduler) {
if (scheduler === void 0) { scheduler = asyncScheduler; }
return operate(function (source, subscriber) {
var activeTask = null;
var lastValue = null;
var lastTime = null;
var emit = function () {
if (activeTask) {
activeTask.unsubscribe();
activeTask = null;
var value = lastValue;
lastValue = null;
subscriber.next(value);
}
};
function emitWhenIdle() {
var targetTime = lastTime + dueTime;
var now = scheduler.now();
if (now < targetTime) {
activeTask = this.schedule(undefined, targetTime - now);
subscriber.add(activeTask);
return;
}
emit();
}
source.subscribe(createOperatorSubscriber(subscriber, function (value) {
lastValue = value;
lastTime = scheduler.now();
if (!activeTask) {
activeTask = scheduler.schedule(emitWhenIdle, dueTime);
subscriber.add(activeTask);
}
}, function () {
emit();
subscriber.complete();
}, undefined, function () {
lastValue = activeTask = null;
}));
});
}
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