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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_WRITABLE_STREAM_WRAPPER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_WRITABLE_STREAM_WRAPPER_H_
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
#include "third_party/blink/renderer/core/streams/writable_stream.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/bindings/trace_wrapper_v8_reference.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "v8/include/v8.h"
namespace blink {
class MessagePort;
// This is an implementation of the WritableStream interface that delegates to
// the V8 Extras implementation. Use TraceWrapperMember to hold a reference to
// an instance of this class.
class CORE_EXPORT WritableStreamWrapper final : public WritableStream {
public:
// Call one of Init functions before using the instance.
WritableStreamWrapper() = default;
~WritableStreamWrapper() override = default;
// If an error happens, |exception_state.HadException()| will be true, and
// |this| will not be usable after that.
void Init(ScriptState*,
ScriptValue underlying_sink,
ScriptValue strategy,
ExceptionState& exception_state);
static WritableStreamWrapper* CreateFromInternalStream(
ScriptState* script_state,
ScriptValue internal_stream,
ExceptionState& exception_state) {
DCHECK(internal_stream.IsObject());
return CreateFromInternalStream(script_state,
internal_stream.V8Value().As<v8::Object>(),
exception_state);
}
static WritableStreamWrapper* CreateFromInternalStream(
ScriptState*,
v8::Local<v8::Object> internal_stream,
ExceptionState&);
void Trace(Visitor* visitor) override;
// IDL defined functions
bool locked(ScriptState*, ExceptionState&) const override;
ScriptPromise abort(ScriptState*, ExceptionState&) override;
ScriptPromise abort(ScriptState*,
ScriptValue reason,
ExceptionState&) override;
ScriptValue getWriter(ScriptState*, ExceptionState&) override;
base::Optional<bool> IsLocked(ScriptState*, ExceptionState&) const override;
// Serialize this stream to |port|. The stream will be locked by this
// operation.
void Serialize(ScriptState*, MessagePort* port, ExceptionState&) override;
// Given a |port| which is entangled with a MessagePort that was previously
// passed to Serialize(), returns a new WritableStreamWrapper which behaves
// like it was the original.
static WritableStreamWrapper* Deserialize(ScriptState*,
MessagePort* port,
ExceptionState&);
ScriptValue GetInternalStream(ScriptState*) const;
private:
bool InitInternal(ScriptState*, v8::Local<v8::Object> internal_stream);
static v8::MaybeLocal<v8::Object> CreateInternalStream(
ScriptState* script_state,
v8::Local<v8::Value> underlying_sink,
v8::Local<v8::Value> strategy);
TraceWrapperV8Reference<v8::Object> internal_stream_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_WRITABLE_STREAM_WRAPPER_H_
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