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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef DOM_COMPRESSION_BASEALGORITHMS_H_
#define DOM_COMPRESSION_BASEALGORITHMS_H_
#include "js/TypeDecls.h"
#include "mozilla/dom/TransformerCallbackHelpers.h"
namespace mozilla::dom::compression {
// A top-level, library-agnostic flush enum that should be converted
// into the native flush values for a given (de)compression library
// with a function defined below.
enum class Flush : bool { No, Yes };
class CompressionStreamAlgorithms : public TransformerAlgorithmsWrapper {
public:
// Step 3 of
// https://wicg.github.io/compression/#dom-decompressionstream-decompressionstream
// Let transformAlgorithm be an algorithm which takes a chunk argument and
// runs the compress and enqueue a chunk algorithm with this and chunk.
MOZ_CAN_RUN_SCRIPT
void TransformCallbackImpl(JS::Handle<JS::Value> aChunk,
TransformStreamDefaultController& aController,
ErrorResult& aRv) override;
// Step 4 of
// https://compression.spec.whatwg.org/#dom-decompressionstream-decompressionstream
// Let flushAlgorithm be an algorithm which takes no argument and runs the
// compress flush and enqueue algorithm with this.
MOZ_CAN_RUN_SCRIPT void FlushCallbackImpl(
TransformStreamDefaultController& aController, ErrorResult& aRv) override;
protected:
static const uint16_t kBufferSize = 16384;
~CompressionStreamAlgorithms() = default;
virtual void Compress(JSContext* aCx, Span<const uint8_t> aInput,
JS::MutableHandleVector<JSObject*> aOutput,
Flush aFlush, ErrorResult& aRv) = 0;
private:
MOZ_CAN_RUN_SCRIPT void CompressAndEnqueue(
JSContext* aCx, Span<const uint8_t> aInput, Flush aFlush,
TransformStreamDefaultController& aController, ErrorResult& aRv);
};
class DecompressionStreamAlgorithms : public TransformerAlgorithmsWrapper {
public:
// Step 3 of
// https://wicg.github.io/compression/#dom-decompressionstream-decompressionstream
// Let transformAlgorithm be an algorithm which takes a chunk argument and
// runs the compress and enqueue a chunk algorithm with this and chunk.
MOZ_CAN_RUN_SCRIPT
void TransformCallbackImpl(JS::Handle<JS::Value> aChunk,
TransformStreamDefaultController& aController,
ErrorResult& aRv) override;
// Step 4 of
// https://compression.spec.whatwg.org/#dom-decompressionstream-decompressionstream
// Let flushAlgorithm be an algorithm which takes no argument and runs the
// compress flush and enqueue algorithm with this.
MOZ_CAN_RUN_SCRIPT void FlushCallbackImpl(
TransformStreamDefaultController& aController, ErrorResult& aRv) override;
protected:
static const uint16_t kBufferSize = 16384;
~DecompressionStreamAlgorithms() = default;
/**
* @return true if the input is fully consumed, else false
*/
virtual bool Decompress(JSContext* aCx, Span<const uint8_t> aInput,
JS::MutableHandleVector<JSObject*> aOutput,
Flush aFlush, ErrorResult& aRv) = 0;
bool mObservedStreamEnd = false;
private:
MOZ_CAN_RUN_SCRIPT void DecompressAndEnqueue(
JSContext* aCx, Span<const uint8_t> aInput, Flush aFlush,
TransformStreamDefaultController& aController, ErrorResult& aRv);
};
} // namespace mozilla::dom::compression
#endif // DOM_COMPRESSION_BASEALGORITHMS_H_
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