third_party/WebKit/Source/bindings/core/v8/ScriptModule.h

// Copyright 2017 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 ScriptModule_h
#define ScriptModule_h

#include "bindings/core/v8/ScriptState.h"
#include "bindings/core/v8/SharedPersistent.h"
#include "core/CoreExport.h"
#include "v8/include/v8.h"
#include "wtf/Allocator.h"
#include "wtf/Vector.h"
#include "wtf/text/WTFString.h"

namespace blink {

// ScriptModule wraps a handle to a v8::Module for use in core.
//
// Using ScriptModules needs a ScriptState and its scope to operate in. You
// should always provide the same ScriptState and not try to reuse ScriptModules
// across different contexts.
// Currently all ScriptModule users can easily access its context Modulator, so
// we use it to fill ScriptState in.
class CORE_EXPORT ScriptModule final {
  DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();

 public:
  static ScriptModule compile(v8::Isolate*,
                              const String& source,
                              const String& fileName);

  ScriptModule() {}
  ScriptModule(const ScriptModule& module) : m_module(module.m_module) {}
  ~ScriptModule();

  // Returns exception, if any.
  ScriptValue instantiate(ScriptState*);
  void evaluate(ScriptState*);

  Vector<String> moduleRequests(ScriptState*);

  bool isNull() const { return !m_module || m_module->isEmpty(); }

 private:
  ScriptModule(v8::Isolate*, v8::Local<v8::Module>);

  static v8::MaybeLocal<v8::Module> resolveModuleCallback(
      v8::Local<v8::Context>,
      v8::Local<v8::String> specifier,
      v8::Local<v8::Module> referrer);

  RefPtr<SharedPersistent<v8::Module>> m_module;
};

}  // namespace blink

#endif  // ScriptModule_h