third_party/blink/renderer/core/streams/stream_script_function.h

// Copyright 2019 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_STREAM_SCRIPT_FUNCTION_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_STREAM_SCRIPT_FUNCTION_H_

#include "third_party/blink/renderer/bindings/core/v8/script_function.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "v8/include/v8.h"

namespace blink {

// A variant of ScriptFunction that avoids the conversion to and from a
// ScriptValue.
class CORE_EXPORT StreamScriptFunction : public ScriptFunction {
 public:
  explicit StreamScriptFunction(ScriptState* script_state);

  virtual void CallWithLocal(v8::Local<v8::Value>) = 0;

  // Exposed as public so that we don't need a boilerplate Create() function for
  // every subclass.
  using ScriptFunction::BindToV8Function;

 private:
  void CallRaw(const v8::FunctionCallbackInfo<v8::Value>&) final;
};

// A convenient wrapper for promise->Then() for when both paths are
// StreamScriptFunctions. It avoids having to call BindToV8Function()
// explicitly. Both |on_fulfilled| and |on_rejected| must be non-null.
void StreamThenPromise(v8::Local<v8::Context>,
                       v8::Local<v8::Promise>,
                       StreamScriptFunction* on_fulfilled,
                       StreamScriptFunction* on_rejected);

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_STREAM_SCRIPT_FUNCTION_H_