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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// @ts-check
/// <reference path="../../core/lib.deno_core.d.ts" />
/// <reference path="./internal.d.ts" />
/// <reference path="./lib.deno_web.d.ts" />
const core = globalThis.Deno.core;
const ops = core.ops;
import * as webidl from "ext:deno_webidl/00_webidl.js";
import { TransformStream } from "ext:deno_web/06_streams.js";
webidl.converters.CompressionFormat = webidl.createEnumConverter(
"CompressionFormat",
[
"deflate",
"deflate-raw",
"gzip",
],
);
class CompressionStream {
#transform;
constructor(format) {
const prefix = "Failed to construct 'CompressionStream'";
webidl.requiredArguments(arguments.length, 1, { prefix });
format = webidl.converters.CompressionFormat(format, {
prefix,
context: "Argument 1",
});
const rid = ops.op_compression_new(format, false);
this.#transform = new TransformStream({
transform(chunk, controller) {
chunk = webidl.converters.BufferSource(chunk, {
prefix,
context: "chunk",
});
const output = ops.op_compression_write(
rid,
chunk,
);
maybeEnqueue(controller, output);
},
flush(controller) {
const output = ops.op_compression_finish(rid);
maybeEnqueue(controller, output);
},
});
this[webidl.brand] = webidl.brand;
}
get readable() {
webidl.assertBranded(this, CompressionStreamPrototype);
return this.#transform.readable;
}
get writable() {
webidl.assertBranded(this, CompressionStreamPrototype);
return this.#transform.writable;
}
}
webidl.configurePrototype(CompressionStream);
const CompressionStreamPrototype = CompressionStream.prototype;
class DecompressionStream {
#transform;
constructor(format) {
const prefix = "Failed to construct 'DecompressionStream'";
webidl.requiredArguments(arguments.length, 1, { prefix });
format = webidl.converters.CompressionFormat(format, {
prefix,
context: "Argument 1",
});
const rid = ops.op_compression_new(format, true);
this.#transform = new TransformStream({
transform(chunk, controller) {
chunk = webidl.converters.BufferSource(chunk, {
prefix,
context: "chunk",
});
const output = ops.op_compression_write(
rid,
chunk,
);
maybeEnqueue(controller, output);
},
flush(controller) {
const output = ops.op_compression_finish(rid);
maybeEnqueue(controller, output);
},
});
this[webidl.brand] = webidl.brand;
}
get readable() {
webidl.assertBranded(this, DecompressionStreamPrototype);
return this.#transform.readable;
}
get writable() {
webidl.assertBranded(this, DecompressionStreamPrototype);
return this.#transform.writable;
}
}
function maybeEnqueue(controller, output) {
if (output && output.byteLength > 0) {
controller.enqueue(output);
}
}
webidl.configurePrototype(DecompressionStream);
const DecompressionStreamPrototype = DecompressionStream.prototype;
export { CompressionStream, DecompressionStream };
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