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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_TRANSFORM_STREAM_TRANSFORMER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_TRANSFORM_STREAM_TRANSFORMER_H_
#include "base/macros.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/heap.h"
#include "v8/include/v8.h"
namespace blink {
class ExceptionState;
class ScriptPromise;
class ScriptState;
class TransformStreamDefaultController;
class Visitor;
// Interface to be implemented by C++ code that needs to create a
// TransformStream. Based on the JavaScript [Transformer
// API](https://streams.spec.whatwg.org/#transformer-api). Errors should be
// signalled by exceptions or promise rejections.
class CORE_EXPORT TransformStreamTransformer
: public GarbageCollected<TransformStreamTransformer> {
public:
TransformStreamTransformer() = default;
virtual ~TransformStreamTransformer() = default;
virtual ScriptPromise Transform(v8::Local<v8::Value> chunk,
TransformStreamDefaultController*,
ExceptionState&) = 0;
virtual ScriptPromise Flush(TransformStreamDefaultController*,
ExceptionState&) = 0;
// Returns the ScriptState associated with this Transformer.
virtual ScriptState* GetScriptState() = 0;
virtual void Trace(Visitor*) {}
private:
DISALLOW_COPY_AND_ASSIGN(TransformStreamTransformer);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_TRANSFORM_STREAM_TRANSFORMER_H_