update

node_modules/rxjs/operators/debounce.js

@@ -0,0 +1,127 @@
+"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 OuterSubscriber_1 = require('../OuterSubscriber');
+var subscribeToResult_1 = require('../util/subscribeToResult');
+/**
+ * Emits a value from the source Observable only after a particular time span
+ * determined by another Observable has passed without another source emission.
+ *
+ * <span class="informal">It's like {@link debounceTime}, but the time span of
+ * emission silence is determined by a second Observable.</span>
+ *
+ * <img src="./img/debounce.png" width="100%">
+ *
+ * `debounce` delays values emitted by the source Observable, but drops previous
+ * pending delayed emissions if a new value arrives on the source Observable.
+ * This operator keeps track of the most recent value from the source
+ * Observable, and spawns a duration Observable by calling the
+ * `durationSelector` function. The value is emitted only when the duration
+ * Observable emits a value or completes, and if no other value was emitted on
+ * the source Observable since the duration Observable was spawned. If a new
+ * value appears before the duration Observable emits, the previous value will
+ * be dropped and will not be emitted on the output Observable.
+ *
+ * Like {@link debounceTime}, this is a rate-limiting operator, and also a
+ * delay-like operator since output emissions do not necessarily occur at the
+ * same time as they did on the source Observable.
+ *
+ * @example <caption>Emit the most recent click after a burst of clicks</caption>
+ * var clicks = Rx.Observable.fromEvent(document, 'click');
+ * var result = clicks.debounce(() => Rx.Observable.interval(1000));
+ * result.subscribe(x => console.log(x));
+ *
+ * @see {@link audit}
+ * @see {@link debounceTime}
+ * @see {@link delayWhen}
+ * @see {@link throttle}
+ *
+ * @param {function(value: T): SubscribableOrPromise} durationSelector A function
+ * that receives a value from the source Observable, for computing the timeout
+ * duration for each source value, returned as an Observable or a Promise.
+ * @return {Observable} An Observable that delays the emissions of the source
+ * Observable by the specified duration Observable returned by
+ * `durationSelector`, and may drop some values if they occur too frequently.
+ * @method debounce
+ * @owner Observable
+ */
+function debounce(durationSelector) {
+    return function (source) { return source.lift(new DebounceOperator(durationSelector)); };
+}
+exports.debounce = debounce;
+var DebounceOperator = (function () {
+    function DebounceOperator(durationSelector) {
+        this.durationSelector = durationSelector;
+    }
+    DebounceOperator.prototype.call = function (subscriber, source) {
+        return source.subscribe(new DebounceSubscriber(subscriber, this.durationSelector));
+    };
+    return DebounceOperator;
+}());
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+var DebounceSubscriber = (function (_super) {
+    __extends(DebounceSubscriber, _super);
+    function DebounceSubscriber(destination, durationSelector) {
+        _super.call(this, destination);
+        this.durationSelector = durationSelector;
+        this.hasValue = false;
+        this.durationSubscription = null;
+    }
+    DebounceSubscriber.prototype._next = function (value) {
+        try {
+            var result = this.durationSelector.call(this, value);
+            if (result) {
+                this._tryNext(value, result);
+            }
+        }
+        catch (err) {
+            this.destination.error(err);
+        }
+    };
+    DebounceSubscriber.prototype._complete = function () {
+        this.emitValue();
+        this.destination.complete();
+    };
+    DebounceSubscriber.prototype._tryNext = function (value, duration) {
+        var subscription = this.durationSubscription;
+        this.value = value;
+        this.hasValue = true;
+        if (subscription) {
+            subscription.unsubscribe();
+            this.remove(subscription);
+        }
+        subscription = subscribeToResult_1.subscribeToResult(this, duration);
+        if (!subscription.closed) {
+            this.add(this.durationSubscription = subscription);
+        }
+    };
+    DebounceSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
+        this.emitValue();
+    };
+    DebounceSubscriber.prototype.notifyComplete = function () {
+        this.emitValue();
+    };
+    DebounceSubscriber.prototype.emitValue = function () {
+        if (this.hasValue) {
+            var value = this.value;
+            var subscription = this.durationSubscription;
+            if (subscription) {
+                this.durationSubscription = null;
+                subscription.unsubscribe();
+                this.remove(subscription);
+            }
+            this.value = null;
+            this.hasValue = false;
+            _super.prototype._next.call(this, value);
+        }
+    };
+    return DebounceSubscriber;
+}(OuterSubscriber_1.OuterSubscriber));
+//# sourceMappingURL=debounce.js.map