chromium/extensions/renderer/module_system.h

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef EXTENSIONS_RENDERER_MODULE_SYSTEM_H_
#define EXTENSIONS_RENDERER_MODULE_SYSTEM_H_

#include <map>
#include <memory>
#include <set>
#include <string>
#include <utility>
#include <vector>

#include "base/compiler_specific.h"
#include "base/memory/raw_ptr.h"
#include "extensions/renderer/native_handler.h"
#include "extensions/renderer/object_backed_native_handler.h"
#include "third_party/blink/public/web/web_script_execution_callback.h"
#include "v8/include/v8-forward.h"
#include "v8/include/v8-object.h"
#include "v8/include/v8-persistent-handle.h"

namespace extensions {

class ScriptContext;
class SourceMap;

// A module system for JS similar to node.js' require() function.
// Each module has three variables in the global scope:
//   - exports, an object returned to dependencies who require() this
//     module.
//   - require, a function that takes a module name as an argument and returns
//     that module's exports object.
//   - requireNative, a function that takes the name of a registered
//     NativeHandler and returns an object that contains the functions the
//     NativeHandler defines.
//
// Each module in a ModuleSystem is executed at most once and its exports
// object cached.
//
// Note that a ModuleSystem must be used only in conjunction with a single
// v8::Context.
// TODO(koz): Rename this to JavaScriptModuleSystem.
class ModuleSystem : public ObjectBackedNativeHandler { … };

}  // namespace extensions

#endif  // EXTENSIONS_RENDERER_MODULE_SYSTEM_H_