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801 lines
28 KiB
TypeScript
801 lines
28 KiB
TypeScript
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// TODO reenable this code when we enable writableStreams and transport types
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// // Forked from https://github.com/stardazed/sd-streams/tree/8928cf04b035fd02fb1340b7eb541c76be37e546
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// // Copyright (c) 2018-Present by Arthur Langereis - @zenmumbler MIT
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// /**
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// * streams/writable-internals - internal types and functions for writable streams
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// * Part of Stardazed
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// * (c) 2018-Present by Arthur Langereis - @zenmumbler
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// * https://github.com/stardazed/sd-streams
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// */
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// /* eslint-disable @typescript-eslint/no-explicit-any */
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// // TODO reenable this lint here
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// import * as shared from "./shared-internals.ts";
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// import * as q from "./queue-mixin.ts";
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// import { QueuingStrategy, QueuingStrategySizeCallback } from "../dom_types.ts";
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// export const backpressure_ = Symbol("backpressure_");
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// export const closeRequest_ = Symbol("closeRequest_");
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// export const inFlightWriteRequest_ = Symbol("inFlightWriteRequest_");
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// export const inFlightCloseRequest_ = Symbol("inFlightCloseRequest_");
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// export const pendingAbortRequest_ = Symbol("pendingAbortRequest_");
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// export const writableStreamController_ = Symbol("writableStreamController_");
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// export const writer_ = Symbol("writer_");
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// export const writeRequests_ = Symbol("writeRequests_");
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// export const abortAlgorithm_ = Symbol("abortAlgorithm_");
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// export const closeAlgorithm_ = Symbol("closeAlgorithm_");
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// export const controlledWritableStream_ = Symbol("controlledWritableStream_");
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// export const started_ = Symbol("started_");
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// export const strategyHWM_ = Symbol("strategyHWM_");
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// export const strategySizeAlgorithm_ = Symbol("strategySizeAlgorithm_");
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// export const writeAlgorithm_ = Symbol("writeAlgorithm_");
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// export const ownerWritableStream_ = Symbol("ownerWritableStream_");
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// export const closedPromise_ = Symbol("closedPromise_");
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// export const readyPromise_ = Symbol("readyPromise_");
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// export const errorSteps_ = Symbol("errorSteps_");
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// export const abortSteps_ = Symbol("abortSteps_");
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// export type StartFunction = (
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// controller: WritableStreamController
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// ) => void | PromiseLike<void>;
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// export type StartAlgorithm = () => Promise<void> | void;
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// export type WriteFunction<InputType> = (
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// chunk: InputType,
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// controller: WritableStreamController
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// ) => void | PromiseLike<void>;
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// export type WriteAlgorithm<InputType> = (chunk: InputType) => Promise<void>;
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// export type CloseAlgorithm = () => Promise<void>;
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// export type AbortAlgorithm = (reason?: shared.ErrorResult) => Promise<void>;
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// // ----
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// export interface WritableStreamController {
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// error(e?: shared.ErrorResult): void;
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// [errorSteps_](): void;
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// [abortSteps_](reason: shared.ErrorResult): Promise<void>;
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// }
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// export interface WriteRecord<InputType> {
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// chunk: InputType;
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// }
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// export interface WritableStreamDefaultController<InputType>
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// extends WritableStreamController,
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// q.QueueContainer<WriteRecord<InputType> | "close"> {
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// [abortAlgorithm_]: AbortAlgorithm; // A promise - returning algorithm, taking one argument(the abort reason), which communicates a requested abort to the underlying sink
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// [closeAlgorithm_]: CloseAlgorithm; // A promise - returning algorithm which communicates a requested close to the underlying sink
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// [controlledWritableStream_]: WritableStream<InputType>; // The WritableStream instance controlled
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// [started_]: boolean; // A boolean flag indicating whether the underlying sink has finished starting
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// [strategyHWM_]: number; // A number supplied by the creator of the stream as part of the stream’s queuing strategy, indicating the point at which the stream will apply backpressure to its underlying sink
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// [strategySizeAlgorithm_]: QueuingStrategySizeCallback<InputType>; // An algorithm to calculate the size of enqueued chunks, as part of the stream’s queuing strategy
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// [writeAlgorithm_]: WriteAlgorithm<InputType>; // A promise-returning algorithm, taking one argument (the chunk to write), which writes data to the underlying sink
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// }
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// // ----
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// export interface WritableStreamWriter<InputType> {
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// readonly closed: Promise<void>;
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// readonly desiredSize: number | null;
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// readonly ready: Promise<void>;
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// abort(reason: shared.ErrorResult): Promise<void>;
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// close(): Promise<void>;
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// releaseLock(): void;
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// write(chunk: InputType): Promise<void>;
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// }
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// export interface WritableStreamDefaultWriter<InputType>
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// extends WritableStreamWriter<InputType> {
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// [ownerWritableStream_]: WritableStream<InputType> | undefined;
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// [closedPromise_]: shared.ControlledPromise<void>;
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// [readyPromise_]: shared.ControlledPromise<void>;
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// }
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// // ----
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// export type WritableStreamState =
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// | "writable"
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// | "closed"
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// | "erroring"
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// | "errored";
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// export interface WritableStreamSink<InputType> {
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// start?: StartFunction;
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// write?: WriteFunction<InputType>;
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// close?(): void | PromiseLike<void>;
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// abort?(reason?: shared.ErrorResult): void;
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// type?: undefined; // unused, for future revisions
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// }
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// export interface AbortRequest {
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// reason: shared.ErrorResult;
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// wasAlreadyErroring: boolean;
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// promise: Promise<void>;
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// resolve(): void;
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// reject(error: shared.ErrorResult): void;
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// }
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// export declare class WritableStream<InputType> {
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// constructor(
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// underlyingSink?: WritableStreamSink<InputType>,
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// strategy?: QueuingStrategy<InputType>
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// );
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// readonly locked: boolean;
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// abort(reason?: shared.ErrorResult): Promise<void>;
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// getWriter(): WritableStreamWriter<InputType>;
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// [shared.state_]: WritableStreamState;
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// [backpressure_]: boolean;
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// [closeRequest_]: shared.ControlledPromise<void> | undefined;
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// [inFlightWriteRequest_]: shared.ControlledPromise<void> | undefined;
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// [inFlightCloseRequest_]: shared.ControlledPromise<void> | undefined;
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// [pendingAbortRequest_]: AbortRequest | undefined;
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// [shared.storedError_]: shared.ErrorResult;
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// [writableStreamController_]:
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// | WritableStreamDefaultController<InputType>
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// | undefined;
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// [writer_]: WritableStreamDefaultWriter<InputType> | undefined;
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// [writeRequests_]: Array<shared.ControlledPromise<void>>;
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// }
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// // ---- Stream
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// export function initializeWritableStream<InputType>(
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// stream: WritableStream<InputType>
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// ): void {
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// stream[shared.state_] = "writable";
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// stream[shared.storedError_] = undefined;
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// stream[writer_] = undefined;
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// stream[writableStreamController_] = undefined;
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// stream[inFlightWriteRequest_] = undefined;
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// stream[closeRequest_] = undefined;
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// stream[inFlightCloseRequest_] = undefined;
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// stream[pendingAbortRequest_] = undefined;
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// stream[writeRequests_] = [];
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// stream[backpressure_] = false;
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// }
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// export function isWritableStream(value: unknown): value is WritableStream<any> {
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// if (typeof value !== "object" || value === null) {
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// return false;
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// }
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// return writableStreamController_ in value;
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// }
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// export function isWritableStreamLocked<InputType>(
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// stream: WritableStream<InputType>
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// ): boolean {
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// return stream[writer_] !== undefined;
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// }
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// export function writableStreamAbort<InputType>(
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// stream: WritableStream<InputType>,
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// reason: shared.ErrorResult
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// ): Promise<void> {
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// const state = stream[shared.state_];
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// if (state === "closed" || state === "errored") {
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// return Promise.resolve(undefined);
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// }
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// let pending = stream[pendingAbortRequest_];
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// if (pending !== undefined) {
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// return pending.promise;
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// }
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// // Assert: state is "writable" or "erroring".
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// let wasAlreadyErroring = false;
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// if (state === "erroring") {
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// wasAlreadyErroring = true;
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// reason = undefined;
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// }
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// pending = {
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// reason,
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// wasAlreadyErroring
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// } as AbortRequest;
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// const promise = new Promise<void>((resolve, reject) => {
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// pending!.resolve = resolve;
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// pending!.reject = reject;
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// });
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// pending.promise = promise;
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// stream[pendingAbortRequest_] = pending;
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// if (!wasAlreadyErroring) {
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// writableStreamStartErroring(stream, reason);
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// }
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// return promise;
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// }
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// export function writableStreamAddWriteRequest<InputType>(
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// stream: WritableStream<InputType>
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// ): Promise<void> {
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// // Assert: !IsWritableStreamLocked(stream) is true.
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// // Assert: stream.[[state]] is "writable".
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// const writePromise = shared.createControlledPromise<void>();
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// stream[writeRequests_].push(writePromise);
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// return writePromise.promise;
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// }
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// export function writableStreamDealWithRejection<InputType>(
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// stream: WritableStream<InputType>,
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// error: shared.ErrorResult
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// ): void {
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// const state = stream[shared.state_];
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// if (state === "writable") {
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// writableStreamStartErroring(stream, error);
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// return;
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// }
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// // Assert: state is "erroring"
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// writableStreamFinishErroring(stream);
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// }
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// export function writableStreamStartErroring<InputType>(
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// stream: WritableStream<InputType>,
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// reason: shared.ErrorResult
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// ): void {
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// // Assert: stream.[[storedError]] is undefined.
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// // Assert: stream.[[state]] is "writable".
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// const controller = stream[writableStreamController_]!;
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// // Assert: controller is not undefined.
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// stream[shared.state_] = "erroring";
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// stream[shared.storedError_] = reason;
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// const writer = stream[writer_];
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// if (writer !== undefined) {
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// writableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);
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// }
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// if (
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// !writableStreamHasOperationMarkedInFlight(stream) &&
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// controller[started_]
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// ) {
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// writableStreamFinishErroring(stream);
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// }
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// }
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// export function writableStreamFinishErroring<InputType>(
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// stream: WritableStream<InputType>
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// ): void {
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// // Assert: stream.[[state]] is "erroring".
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// // Assert: writableStreamHasOperationMarkedInFlight(stream) is false.
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// stream[shared.state_] = "errored";
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// const controller = stream[writableStreamController_]!;
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// controller[errorSteps_]();
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// const storedError = stream[shared.storedError_];
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// for (const writeRequest of stream[writeRequests_]) {
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// writeRequest.reject(storedError);
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// }
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// stream[writeRequests_] = [];
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// const abortRequest = stream[pendingAbortRequest_];
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// if (abortRequest === undefined) {
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// writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
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// return;
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// }
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// stream[pendingAbortRequest_] = undefined;
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// if (abortRequest.wasAlreadyErroring) {
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// abortRequest.reject(storedError);
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// writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
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// return;
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// }
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// const promise = controller[abortSteps_](abortRequest.reason);
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// promise.then(
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// _ => {
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// abortRequest.resolve();
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// writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
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// },
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// error => {
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// abortRequest.reject(error);
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// writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
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// }
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// );
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// }
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// export function writableStreamFinishInFlightWrite<InputType>(
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// stream: WritableStream<InputType>
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// ): void {
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// // Assert: stream.[[inFlightWriteRequest]] is not undefined.
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// stream[inFlightWriteRequest_]!.resolve(undefined);
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// stream[inFlightWriteRequest_] = undefined;
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// }
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// export function writableStreamFinishInFlightWriteWithError<InputType>(
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// stream: WritableStream<InputType>,
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// error: shared.ErrorResult
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// ): void {
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// // Assert: stream.[[inFlightWriteRequest]] is not undefined.
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// stream[inFlightWriteRequest_]!.reject(error);
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// stream[inFlightWriteRequest_] = undefined;
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// // Assert: stream.[[state]] is "writable" or "erroring".
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// writableStreamDealWithRejection(stream, error);
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// }
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// export function writableStreamFinishInFlightClose<InputType>(
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// stream: WritableStream<InputType>
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// ): void {
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// // Assert: stream.[[inFlightCloseRequest]] is not undefined.
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// stream[inFlightCloseRequest_]!.resolve(undefined);
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// stream[inFlightCloseRequest_] = undefined;
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// const state = stream[shared.state_];
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// // Assert: stream.[[state]] is "writable" or "erroring".
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// if (state === "erroring") {
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// stream[shared.storedError_] = undefined;
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// if (stream[pendingAbortRequest_] !== undefined) {
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// stream[pendingAbortRequest_]!.resolve();
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// stream[pendingAbortRequest_] = undefined;
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// }
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// }
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// stream[shared.state_] = "closed";
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// const writer = stream[writer_];
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// if (writer !== undefined) {
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// writer[closedPromise_].resolve(undefined);
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// }
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// // Assert: stream.[[pendingAbortRequest]] is undefined.
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|||
|
|
// // Assert: stream.[[storedError]] is undefined.
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamFinishInFlightCloseWithError<InputType>(
|
|||
|
|
// stream: WritableStream<InputType>,
|
|||
|
|
// error: shared.ErrorResult
|
|||
|
|
// ): void {
|
|||
|
|
// // Assert: stream.[[inFlightCloseRequest]] is not undefined.
|
|||
|
|
// stream[inFlightCloseRequest_]!.reject(error);
|
|||
|
|
// stream[inFlightCloseRequest_] = undefined;
|
|||
|
|
// // Assert: stream.[[state]] is "writable" or "erroring".
|
|||
|
|
// if (stream[pendingAbortRequest_] !== undefined) {
|
|||
|
|
// stream[pendingAbortRequest_]!.reject(error);
|
|||
|
|
// stream[pendingAbortRequest_] = undefined;
|
|||
|
|
// }
|
|||
|
|
// writableStreamDealWithRejection(stream, error);
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamCloseQueuedOrInFlight<InputType>(
|
|||
|
|
// stream: WritableStream<InputType>
|
|||
|
|
// ): boolean {
|
|||
|
|
// return (
|
|||
|
|
// stream[closeRequest_] !== undefined ||
|
|||
|
|
// stream[inFlightCloseRequest_] !== undefined
|
|||
|
|
// );
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamHasOperationMarkedInFlight<InputType>(
|
|||
|
|
// stream: WritableStream<InputType>
|
|||
|
|
// ): boolean {
|
|||
|
|
// return (
|
|||
|
|
// stream[inFlightWriteRequest_] !== undefined ||
|
|||
|
|
// stream[inFlightCloseRequest_] !== undefined
|
|||
|
|
// );
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamMarkCloseRequestInFlight<InputType>(
|
|||
|
|
// stream: WritableStream<InputType>
|
|||
|
|
// ): void {
|
|||
|
|
// // Assert: stream.[[inFlightCloseRequest]] is undefined.
|
|||
|
|
// // Assert: stream.[[closeRequest]] is not undefined.
|
|||
|
|
// stream[inFlightCloseRequest_] = stream[closeRequest_];
|
|||
|
|
// stream[closeRequest_] = undefined;
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamMarkFirstWriteRequestInFlight<InputType>(
|
|||
|
|
// stream: WritableStream<InputType>
|
|||
|
|
// ): void {
|
|||
|
|
// // Assert: stream.[[inFlightWriteRequest]] is undefined.
|
|||
|
|
// // Assert: stream.[[writeRequests]] is not empty.
|
|||
|
|
// const writeRequest = stream[writeRequests_].shift()!;
|
|||
|
|
// stream[inFlightWriteRequest_] = writeRequest;
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamRejectCloseAndClosedPromiseIfNeeded<InputType>(
|
|||
|
|
// stream: WritableStream<InputType>
|
|||
|
|
// ): void {
|
|||
|
|
// // Assert: stream.[[state]] is "errored".
|
|||
|
|
// const closeRequest = stream[closeRequest_];
|
|||
|
|
// if (closeRequest !== undefined) {
|
|||
|
|
// // Assert: stream.[[inFlightCloseRequest]] is undefined.
|
|||
|
|
// closeRequest.reject(stream[shared.storedError_]);
|
|||
|
|
// stream[closeRequest_] = undefined;
|
|||
|
|
// }
|
|||
|
|
// const writer = stream[writer_];
|
|||
|
|
// if (writer !== undefined) {
|
|||
|
|
// writer[closedPromise_].reject(stream[shared.storedError_]);
|
|||
|
|
// writer[closedPromise_].promise.catch(() => {});
|
|||
|
|
// }
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamUpdateBackpressure<InputType>(
|
|||
|
|
// stream: WritableStream<InputType>,
|
|||
|
|
// backpressure: boolean
|
|||
|
|
// ): void {
|
|||
|
|
// // Assert: stream.[[state]] is "writable".
|
|||
|
|
// // Assert: !WritableStreamCloseQueuedOrInFlight(stream) is false.
|
|||
|
|
// const writer = stream[writer_];
|
|||
|
|
// if (writer !== undefined && backpressure !== stream[backpressure_]) {
|
|||
|
|
// if (backpressure) {
|
|||
|
|
// writer[readyPromise_] = shared.createControlledPromise<void>();
|
|||
|
|
// } else {
|
|||
|
|
// writer[readyPromise_].resolve(undefined);
|
|||
|
|
// }
|
|||
|
|
// }
|
|||
|
|
// stream[backpressure_] = backpressure;
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// // ---- Writers
|
|||
|
|
|
|||
|
|
// export function isWritableStreamDefaultWriter(
|
|||
|
|
// value: unknown
|
|||
|
|
// ): value is WritableStreamDefaultWriter<any> {
|
|||
|
|
// if (typeof value !== "object" || value === null) {
|
|||
|
|
// return false;
|
|||
|
|
// }
|
|||
|
|
// return ownerWritableStream_ in value;
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultWriterAbort<InputType>(
|
|||
|
|
// writer: WritableStreamDefaultWriter<InputType>,
|
|||
|
|
// reason: shared.ErrorResult
|
|||
|
|
// ): Promise<void> {
|
|||
|
|
// const stream = writer[ownerWritableStream_]!;
|
|||
|
|
// // Assert: stream is not undefined.
|
|||
|
|
// return writableStreamAbort(stream, reason);
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultWriterClose<InputType>(
|
|||
|
|
// writer: WritableStreamDefaultWriter<InputType>
|
|||
|
|
// ): Promise<void> {
|
|||
|
|
// const stream = writer[ownerWritableStream_]!;
|
|||
|
|
// // Assert: stream is not undefined.
|
|||
|
|
// const state = stream[shared.state_];
|
|||
|
|
// if (state === "closed" || state === "errored") {
|
|||
|
|
// return Promise.reject(
|
|||
|
|
// new TypeError("Writer stream is already closed or errored")
|
|||
|
|
// );
|
|||
|
|
// }
|
|||
|
|
// // Assert: state is "writable" or "erroring".
|
|||
|
|
// // Assert: writableStreamCloseQueuedOrInFlight(stream) is false.
|
|||
|
|
// const closePromise = shared.createControlledPromise<void>();
|
|||
|
|
// stream[closeRequest_] = closePromise;
|
|||
|
|
// if (stream[backpressure_] && state === "writable") {
|
|||
|
|
// writer[readyPromise_].resolve(undefined);
|
|||
|
|
// }
|
|||
|
|
// writableStreamDefaultControllerClose(stream[writableStreamController_]!);
|
|||
|
|
// return closePromise.promise;
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultWriterCloseWithErrorPropagation<InputType>(
|
|||
|
|
// writer: WritableStreamDefaultWriter<InputType>
|
|||
|
|
// ): Promise<void> {
|
|||
|
|
// const stream = writer[ownerWritableStream_]!;
|
|||
|
|
// // Assert: stream is not undefined.
|
|||
|
|
// const state = stream[shared.state_];
|
|||
|
|
// if (writableStreamCloseQueuedOrInFlight(stream) || state === "closed") {
|
|||
|
|
// return Promise.resolve(undefined);
|
|||
|
|
// }
|
|||
|
|
// if (state === "errored") {
|
|||
|
|
// return Promise.reject(stream[shared.storedError_]);
|
|||
|
|
// }
|
|||
|
|
// // Assert: state is "writable" or "erroring".
|
|||
|
|
// return writableStreamDefaultWriterClose(writer);
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultWriterEnsureClosedPromiseRejected<
|
|||
|
|
// InputType
|
|||
|
|
// >(
|
|||
|
|
// writer: WritableStreamDefaultWriter<InputType>,
|
|||
|
|
// error: shared.ErrorResult
|
|||
|
|
// ): void {
|
|||
|
|
// const closedPromise = writer[closedPromise_];
|
|||
|
|
// if (closedPromise.state === shared.ControlledPromiseState.Pending) {
|
|||
|
|
// closedPromise.reject(error);
|
|||
|
|
// } else {
|
|||
|
|
// writer[closedPromise_] = shared.createControlledPromise<void>();
|
|||
|
|
// writer[closedPromise_].reject(error);
|
|||
|
|
// }
|
|||
|
|
// writer[closedPromise_].promise.catch(() => {});
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultWriterEnsureReadyPromiseRejected<
|
|||
|
|
// InputType
|
|||
|
|
// >(
|
|||
|
|
// writer: WritableStreamDefaultWriter<InputType>,
|
|||
|
|
// error: shared.ErrorResult
|
|||
|
|
// ): void {
|
|||
|
|
// const readyPromise = writer[readyPromise_];
|
|||
|
|
// if (readyPromise.state === shared.ControlledPromiseState.Pending) {
|
|||
|
|
// readyPromise.reject(error);
|
|||
|
|
// } else {
|
|||
|
|
// writer[readyPromise_] = shared.createControlledPromise<void>();
|
|||
|
|
// writer[readyPromise_].reject(error);
|
|||
|
|
// }
|
|||
|
|
// writer[readyPromise_].promise.catch(() => {});
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultWriterGetDesiredSize<InputType>(
|
|||
|
|
// writer: WritableStreamDefaultWriter<InputType>
|
|||
|
|
// ): number | null {
|
|||
|
|
// const stream = writer[ownerWritableStream_]!;
|
|||
|
|
// const state = stream[shared.state_];
|
|||
|
|
// if (state === "errored" || state === "erroring") {
|
|||
|
|
// return null;
|
|||
|
|
// }
|
|||
|
|
// if (state === "closed") {
|
|||
|
|
// return 0;
|
|||
|
|
// }
|
|||
|
|
// return writableStreamDefaultControllerGetDesiredSize(
|
|||
|
|
// stream[writableStreamController_]!
|
|||
|
|
// );
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultWriterRelease<InputType>(
|
|||
|
|
// writer: WritableStreamDefaultWriter<InputType>
|
|||
|
|
// ): void {
|
|||
|
|
// const stream = writer[ownerWritableStream_]!;
|
|||
|
|
// // Assert: stream is not undefined.
|
|||
|
|
// // Assert: stream.[[writer]] is writer.
|
|||
|
|
// const releasedError = new TypeError();
|
|||
|
|
// writableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);
|
|||
|
|
// writableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);
|
|||
|
|
// stream[writer_] = undefined;
|
|||
|
|
// writer[ownerWritableStream_] = undefined;
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultWriterWrite<InputType>(
|
|||
|
|
// writer: WritableStreamDefaultWriter<InputType>,
|
|||
|
|
// chunk: InputType
|
|||
|
|
// ): Promise<void> {
|
|||
|
|
// const stream = writer[ownerWritableStream_]!;
|
|||
|
|
// // Assert: stream is not undefined.
|
|||
|
|
// const controller = stream[writableStreamController_]!;
|
|||
|
|
// const chunkSize = writableStreamDefaultControllerGetChunkSize(
|
|||
|
|
// controller,
|
|||
|
|
// chunk
|
|||
|
|
// );
|
|||
|
|
// if (writer[ownerWritableStream_] !== stream) {
|
|||
|
|
// return Promise.reject(new TypeError());
|
|||
|
|
// }
|
|||
|
|
// const state = stream[shared.state_];
|
|||
|
|
// if (state === "errored") {
|
|||
|
|
// return Promise.reject(stream[shared.storedError_]);
|
|||
|
|
// }
|
|||
|
|
// if (writableStreamCloseQueuedOrInFlight(stream) || state === "closed") {
|
|||
|
|
// return Promise.reject(
|
|||
|
|
// new TypeError("Cannot write to a closing or closed stream")
|
|||
|
|
// );
|
|||
|
|
// }
|
|||
|
|
// if (state === "erroring") {
|
|||
|
|
// return Promise.reject(stream[shared.storedError_]);
|
|||
|
|
// }
|
|||
|
|
// // Assert: state is "writable".
|
|||
|
|
// const promise = writableStreamAddWriteRequest(stream);
|
|||
|
|
// writableStreamDefaultControllerWrite(controller, chunk, chunkSize);
|
|||
|
|
// return promise;
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// // ---- Controller
|
|||
|
|
|
|||
|
|
// export function setUpWritableStreamDefaultController<InputType>(
|
|||
|
|
// stream: WritableStream<InputType>,
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>,
|
|||
|
|
// startAlgorithm: StartAlgorithm,
|
|||
|
|
// writeAlgorithm: WriteAlgorithm<InputType>,
|
|||
|
|
// closeAlgorithm: CloseAlgorithm,
|
|||
|
|
// abortAlgorithm: AbortAlgorithm,
|
|||
|
|
// highWaterMark: number,
|
|||
|
|
// sizeAlgorithm: QueuingStrategySizeCallback<InputType>
|
|||
|
|
// ): void {
|
|||
|
|
// if (!isWritableStream(stream)) {
|
|||
|
|
// throw new TypeError();
|
|||
|
|
// }
|
|||
|
|
// if (stream[writableStreamController_] !== undefined) {
|
|||
|
|
// throw new TypeError();
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// controller[controlledWritableStream_] = stream;
|
|||
|
|
// stream[writableStreamController_] = controller;
|
|||
|
|
// q.resetQueue(controller);
|
|||
|
|
// controller[started_] = false;
|
|||
|
|
// controller[strategySizeAlgorithm_] = sizeAlgorithm;
|
|||
|
|
// controller[strategyHWM_] = highWaterMark;
|
|||
|
|
// controller[writeAlgorithm_] = writeAlgorithm;
|
|||
|
|
// controller[closeAlgorithm_] = closeAlgorithm;
|
|||
|
|
// controller[abortAlgorithm_] = abortAlgorithm;
|
|||
|
|
// const backpressure = writableStreamDefaultControllerGetBackpressure(
|
|||
|
|
// controller
|
|||
|
|
// );
|
|||
|
|
// writableStreamUpdateBackpressure(stream, backpressure);
|
|||
|
|
|
|||
|
|
// const startResult = startAlgorithm();
|
|||
|
|
// Promise.resolve(startResult).then(
|
|||
|
|
// _ => {
|
|||
|
|
// // Assert: stream.[[state]] is "writable" or "erroring".
|
|||
|
|
// controller[started_] = true;
|
|||
|
|
// writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
|
|||
|
|
// },
|
|||
|
|
// error => {
|
|||
|
|
// // Assert: stream.[[state]] is "writable" or "erroring".
|
|||
|
|
// controller[started_] = true;
|
|||
|
|
// writableStreamDealWithRejection(stream, error);
|
|||
|
|
// }
|
|||
|
|
// );
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function isWritableStreamDefaultController(
|
|||
|
|
// value: unknown
|
|||
|
|
// ): value is WritableStreamDefaultController<any> {
|
|||
|
|
// if (typeof value !== "object" || value === null) {
|
|||
|
|
// return false;
|
|||
|
|
// }
|
|||
|
|
// return controlledWritableStream_ in value;
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultControllerClearAlgorithms<InputType>(
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>
|
|||
|
|
// ): void {
|
|||
|
|
// // Use ! assertions to override type check here, this way we don't
|
|||
|
|
// // have to perform type checks/assertions everywhere else.
|
|||
|
|
// controller[writeAlgorithm_] = undefined!;
|
|||
|
|
// controller[closeAlgorithm_] = undefined!;
|
|||
|
|
// controller[abortAlgorithm_] = undefined!;
|
|||
|
|
// controller[strategySizeAlgorithm_] = undefined!;
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultControllerClose<InputType>(
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>
|
|||
|
|
// ): void {
|
|||
|
|
// q.enqueueValueWithSize(controller, "close", 0);
|
|||
|
|
// writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultControllerGetChunkSize<InputType>(
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>,
|
|||
|
|
// chunk: InputType
|
|||
|
|
// ): number {
|
|||
|
|
// let chunkSize: number;
|
|||
|
|
// try {
|
|||
|
|
// chunkSize = controller[strategySizeAlgorithm_](chunk);
|
|||
|
|
// } catch (error) {
|
|||
|
|
// writableStreamDefaultControllerErrorIfNeeded(controller, error);
|
|||
|
|
// chunkSize = 1;
|
|||
|
|
// }
|
|||
|
|
// return chunkSize;
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultControllerGetDesiredSize<InputType>(
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>
|
|||
|
|
// ): number {
|
|||
|
|
// return controller[strategyHWM_] - controller[q.queueTotalSize_];
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultControllerWrite<InputType>(
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>,
|
|||
|
|
// chunk: InputType,
|
|||
|
|
// chunkSize: number
|
|||
|
|
// ): void {
|
|||
|
|
// try {
|
|||
|
|
// q.enqueueValueWithSize(controller, { chunk }, chunkSize);
|
|||
|
|
// } catch (error) {
|
|||
|
|
// writableStreamDefaultControllerErrorIfNeeded(controller, error);
|
|||
|
|
// return;
|
|||
|
|
// }
|
|||
|
|
// const stream = controller[controlledWritableStream_];
|
|||
|
|
// if (
|
|||
|
|
// !writableStreamCloseQueuedOrInFlight(stream) &&
|
|||
|
|
// stream[shared.state_] === "writable"
|
|||
|
|
// ) {
|
|||
|
|
// const backpressure = writableStreamDefaultControllerGetBackpressure(
|
|||
|
|
// controller
|
|||
|
|
// );
|
|||
|
|
// writableStreamUpdateBackpressure(stream, backpressure);
|
|||
|
|
// }
|
|||
|
|
// writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultControllerAdvanceQueueIfNeeded<InputType>(
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>
|
|||
|
|
// ): void {
|
|||
|
|
// if (!controller[started_]) {
|
|||
|
|
// return;
|
|||
|
|
// }
|
|||
|
|
// const stream = controller[controlledWritableStream_];
|
|||
|
|
// if (stream[inFlightWriteRequest_] !== undefined) {
|
|||
|
|
// return;
|
|||
|
|
// }
|
|||
|
|
// const state = stream[shared.state_];
|
|||
|
|
// if (state === "closed" || state === "errored") {
|
|||
|
|
// return;
|
|||
|
|
// }
|
|||
|
|
// if (state === "erroring") {
|
|||
|
|
// writableStreamFinishErroring(stream);
|
|||
|
|
// return;
|
|||
|
|
// }
|
|||
|
|
// if (controller[q.queue_].length === 0) {
|
|||
|
|
// return;
|
|||
|
|
// }
|
|||
|
|
// const writeRecord = q.peekQueueValue(controller);
|
|||
|
|
// if (writeRecord === "close") {
|
|||
|
|
// writableStreamDefaultControllerProcessClose(controller);
|
|||
|
|
// } else {
|
|||
|
|
// writableStreamDefaultControllerProcessWrite(controller, writeRecord.chunk);
|
|||
|
|
// }
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultControllerErrorIfNeeded<InputType>(
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>,
|
|||
|
|
// error: shared.ErrorResult
|
|||
|
|
// ): void {
|
|||
|
|
// if (controller[controlledWritableStream_][shared.state_] === "writable") {
|
|||
|
|
// writableStreamDefaultControllerError(controller, error);
|
|||
|
|
// }
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultControllerProcessClose<InputType>(
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>
|
|||
|
|
// ): void {
|
|||
|
|
// const stream = controller[controlledWritableStream_];
|
|||
|
|
// writableStreamMarkCloseRequestInFlight(stream);
|
|||
|
|
// q.dequeueValue(controller);
|
|||
|
|
// // Assert: controller.[[queue]] is empty.
|
|||
|
|
// const sinkClosePromise = controller[closeAlgorithm_]();
|
|||
|
|
// writableStreamDefaultControllerClearAlgorithms(controller);
|
|||
|
|
// sinkClosePromise.then(
|
|||
|
|
// _ => {
|
|||
|
|
// writableStreamFinishInFlightClose(stream);
|
|||
|
|
// },
|
|||
|
|
// error => {
|
|||
|
|
// writableStreamFinishInFlightCloseWithError(stream, error);
|
|||
|
|
// }
|
|||
|
|
// );
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultControllerProcessWrite<InputType>(
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>,
|
|||
|
|
// chunk: InputType
|
|||
|
|
// ): void {
|
|||
|
|
// const stream = controller[controlledWritableStream_];
|
|||
|
|
// writableStreamMarkFirstWriteRequestInFlight(stream);
|
|||
|
|
// controller[writeAlgorithm_](chunk).then(
|
|||
|
|
// _ => {
|
|||
|
|
// writableStreamFinishInFlightWrite(stream);
|
|||
|
|
// const state = stream[shared.state_];
|
|||
|
|
// // Assert: state is "writable" or "erroring".
|
|||
|
|
// q.dequeueValue(controller);
|
|||
|
|
// if (
|
|||
|
|
// !writableStreamCloseQueuedOrInFlight(stream) &&
|
|||
|
|
// state === "writable"
|
|||
|
|
// ) {
|
|||
|
|
// const backpressure = writableStreamDefaultControllerGetBackpressure(
|
|||
|
|
// controller
|
|||
|
|
// );
|
|||
|
|
// writableStreamUpdateBackpressure(stream, backpressure);
|
|||
|
|
// }
|
|||
|
|
// writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
|
|||
|
|
// },
|
|||
|
|
// error => {
|
|||
|
|
// if (stream[shared.state_] === "writable") {
|
|||
|
|
// writableStreamDefaultControllerClearAlgorithms(controller);
|
|||
|
|
// }
|
|||
|
|
// writableStreamFinishInFlightWriteWithError(stream, error);
|
|||
|
|
// }
|
|||
|
|
// );
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultControllerGetBackpressure<InputType>(
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>
|
|||
|
|
// ): boolean {
|
|||
|
|
// const desiredSize = writableStreamDefaultControllerGetDesiredSize(controller);
|
|||
|
|
// return desiredSize <= 0;
|
|||
|
|
// }
|
|||
|
|
|
|||
|
|
// export function writableStreamDefaultControllerError<InputType>(
|
|||
|
|
// controller: WritableStreamDefaultController<InputType>,
|
|||
|
|
// error: shared.ErrorResult
|
|||
|
|
// ): void {
|
|||
|
|
// const stream = controller[controlledWritableStream_];
|
|||
|
|
// // Assert: stream.[[state]] is "writable".
|
|||
|
|
// writableStreamDefaultControllerClearAlgorithms(controller);
|
|||
|
|
// writableStreamStartErroring(stream, error);
|
|||
|
|
// }
|