| /* |
| * Copyright (C) 2022 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| export type OnProgressUpdateType = (percentage: number) => void; |
| |
| export class FunctionUtils { |
| static readonly DO_NOTHING = () => { |
| // do nothing |
| }; |
| |
| static readonly DO_NOTHING_ASYNC = (): Promise<void> => { |
| return Promise.resolve(); |
| }; |
| |
| static mixin<T extends object, U extends object>(a: T, b: U): T & U { |
| const ret = {}; |
| Object.assign(ret, a); |
| Object.assign(ret, b); |
| |
| const assignMethods = (dst: object, src: object) => { |
| for (const methodName of Object.getOwnPropertyNames(Object.getPrototypeOf(src))) { |
| const method = (src as any)[methodName]; |
| (dst as any)[methodName] = method; |
| } |
| }; |
| |
| assignMethods(ret, a); |
| assignMethods(ret, b); |
| |
| return ret as T & U; |
| } |
| } |