/**
 * Copyright 2019 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */ import { Transform , Observable } from "../types.js" ; import { buffer } from "./buffer.js" ; import { map } from "./map.js" ; import { fromIterable } from "../sources/index.js" ; typeparam param notifier returns export function window < T > ( notifier ) { const { readable , writable } = new TransformStream ( undefined , { highWaterMark : 1 } , { highWaterMark : 0 } ) ; return { writable , readable : readable . pipeThrough ( buffer < T > ( notifier ) ) . pipeThrough ( map ( v => fromIterable ( v ) ) ) } ; }