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node_modules/rxjs/_esm5/operators/bufferToggle.js

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+/** PURE_IMPORTS_START .._Subscription,.._util_subscribeToResult,.._OuterSubscriber 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 { Subscription } from '../Subscription';
+import { subscribeToResult } from '../util/subscribeToResult';
+import { OuterSubscriber } from '../OuterSubscriber';
+/**
+ * Buffers the source Observable values starting from an emission from
+ * `openings` and ending when the output of `closingSelector` emits.
+ *
+ * <span class="informal">Collects values from the past as an array. Starts
+ * collecting only when `opening` emits, and calls the `closingSelector`
+ * function to get an Observable that tells when to close the buffer.</span>
+ *
+ * <img src="./img/bufferToggle.png" width="100%">
+ *
+ * Buffers values from the source by opening the buffer via signals from an
+ * Observable provided to `openings`, and closing and sending the buffers when
+ * a Subscribable or Promise returned by the `closingSelector` function emits.
+ *
+ * @example <caption>Every other second, emit the click events from the next 500ms</caption>
+ * var clicks = Rx.Observable.fromEvent(document, 'click');
+ * var openings = Rx.Observable.interval(1000);
+ * var buffered = clicks.bufferToggle(openings, i =>
+ *   i % 2 ? Rx.Observable.interval(500) : Rx.Observable.empty()
+ * );
+ * buffered.subscribe(x => console.log(x));
+ *
+ * @see {@link buffer}
+ * @see {@link bufferCount}
+ * @see {@link bufferTime}
+ * @see {@link bufferWhen}
+ * @see {@link windowToggle}
+ *
+ * @param {SubscribableOrPromise<O>} openings A Subscribable or Promise of notifications to start new
+ * buffers.
+ * @param {function(value: O): SubscribableOrPromise} closingSelector A function that takes
+ * the value emitted by the `openings` observable and returns a Subscribable or Promise,
+ * which, when it emits, signals that the associated buffer should be emitted
+ * and cleared.
+ * @return {Observable<T[]>} An observable of arrays of buffered values.
+ * @method bufferToggle
+ * @owner Observable
+ */
+export function bufferToggle(openings, closingSelector) {
+    return function bufferToggleOperatorFunction(source) {
+        return source.lift(new BufferToggleOperator(openings, closingSelector));
+    };
+}
+var BufferToggleOperator = /*@__PURE__*/ (/*@__PURE__*/ function () {
+    function BufferToggleOperator(openings, closingSelector) {
+        this.openings = openings;
+        this.closingSelector = closingSelector;
+    }
+    BufferToggleOperator.prototype.call = function (subscriber, source) {
+        return source.subscribe(new BufferToggleSubscriber(subscriber, this.openings, this.closingSelector));
+    };
+    return BufferToggleOperator;
+}());
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+var BufferToggleSubscriber = /*@__PURE__*/ (/*@__PURE__*/ function (_super) {
+    __extends(BufferToggleSubscriber, _super);
+    function BufferToggleSubscriber(destination, openings, closingSelector) {
+        _super.call(this, destination);
+        this.openings = openings;
+        this.closingSelector = closingSelector;
+        this.contexts = [];
+        this.add(subscribeToResult(this, openings));
+    }
+    BufferToggleSubscriber.prototype._next = function (value) {
+        var contexts = this.contexts;
+        var len = contexts.length;
+        for (var i = 0; i < len; i++) {
+            contexts[i].buffer.push(value);
+        }
+    };
+    BufferToggleSubscriber.prototype._error = function (err) {
+        var contexts = this.contexts;
+        while (contexts.length > 0) {
+            var context = contexts.shift();
+            context.subscription.unsubscribe();
+            context.buffer = null;
+            context.subscription = null;
+        }
+        this.contexts = null;
+        _super.prototype._error.call(this, err);
+    };
+    BufferToggleSubscriber.prototype._complete = function () {
+        var contexts = this.contexts;
+        while (contexts.length > 0) {
+            var context = contexts.shift();
+            this.destination.next(context.buffer);
+            context.subscription.unsubscribe();
+            context.buffer = null;
+            context.subscription = null;
+        }
+        this.contexts = null;
+        _super.prototype._complete.call(this);
+    };
+    BufferToggleSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
+        outerValue ? this.closeBuffer(outerValue) : this.openBuffer(innerValue);
+    };
+    BufferToggleSubscriber.prototype.notifyComplete = function (innerSub) {
+        this.closeBuffer(innerSub.context);
+    };
+    BufferToggleSubscriber.prototype.openBuffer = function (value) {
+        try {
+            var closingSelector = this.closingSelector;
+            var closingNotifier = closingSelector.call(this, value);
+            if (closingNotifier) {
+                this.trySubscribe(closingNotifier);
+            }
+        }
+        catch (err) {
+            this._error(err);
+        }
+    };
+    BufferToggleSubscriber.prototype.closeBuffer = function (context) {
+        var contexts = this.contexts;
+        if (contexts && context) {
+            var buffer = context.buffer, subscription = context.subscription;
+            this.destination.next(buffer);
+            contexts.splice(contexts.indexOf(context), 1);
+            this.remove(subscription);
+            subscription.unsubscribe();
+        }
+    };
+    BufferToggleSubscriber.prototype.trySubscribe = function (closingNotifier) {
+        var contexts = this.contexts;
+        var buffer = [];
+        var subscription = new Subscription();
+        var context = { buffer: buffer, subscription: subscription };
+        contexts.push(context);
+        var innerSubscription = subscribeToResult(this, closingNotifier, context);
+        if (!innerSubscription || innerSubscription.closed) {
+            this.closeBuffer(context);
+        }
+        else {
+            innerSubscription.context = context;
+            this.add(innerSubscription);
+            subscription.add(innerSubscription);
+        }
+    };
+    return BufferToggleSubscriber;
+}(OuterSubscriber));
+//# sourceMappingURL=bufferToggle.js.map