[WIP Prototype] ES6 https://html.spec.whatwg.org/#fetch-a-single-module-script implementation

third_party/WebKit/Source/core/dom/ModulatorImpl.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 ModulatorImpl_h
+#define ModulatorImpl_h
+
+#include "bindings/core/v8/ScriptModule.h"
+#include "bindings/core/v8/V8PerIsolateData.h"
+#include "core/dom/Modulator.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class Document;
+class ModuleMap;
+class ModuleScriptLoaderRegistry;
+class ModuleTreeLinkerRegistry;
+class ResourceFetcher;
+class ScriptState;
+class WebTaskRunner;
+
+class ModulatorImpl final : public GarbageCollectedFinalized<Modulator>,
+                            public Modulator {
+  USING_GARBAGE_COLLECTED_MIXIN(ModulatorImpl);
+
+ public:
+  static ModulatorImpl* create(RefPtr<ScriptState>, Document&);

[dominicc (has gone to gerrit), 2017/01/11 03:23:48]

Probably fine, but what would the parameter list look like if we had something
workers could use too?

[kouhei (in TOK), 2017/01/13 05:41:28]

The idea was to eventually have create(State, WorkerOrWorkletGlobalScope)

+
+  virtual ~ModulatorImpl();
+  DECLARE_TRACE();
+
+ private:
+  // Implements Modulator
+
+  ScriptModuleResolver* scriptModuleResolver() override {
+    return m_scriptModuleResolver.get();
+  }
+  WebTaskRunner* taskRunner() override { return m_taskRunner.get(); }
+
+  void fetchTree(const KURL&, const KURL& baseURL, ModuleTreeClient*) override;
+  void fetchSingle(
+      const KURL&,
+      const KURL& baseURL,
+      SingleModuleClient*
+      /*, a fetch client settings object, a destination, a cryptographic nonce, a parser state, a credentials mode, a module map settings object, a referrer, and a top-level module fetch flag*/)
+      override;
+  void fetchNewSingleModule(
+      const KURL&,
+      const KURL& baseURL,
+      ModuleScriptLoaderClient*
+      /*, a fetch client settings object, a destination, a cryptographic nonce, a parser state, a credentials mode, a module map settings object, a referrer, and a top-level module fetch flag*/)
+      override;
+
+  ModuleScript* retrieveFetchedModuleScript(const KURL&) override;
+
+  ScriptModule compileModule(const String& script,

[dominicc (has gone to gerrit), 2017/01/11 03:23:48]

I feel like there's a second interface here called the ModuleExecutor or
something to do with Compile-Instantiate-Execute.

+                                     const String& urlStr) override;
+  bool instantiateModule(ScriptModule) override;
+  Vector<String> moduleRequestsFromScriptModule(ScriptModule) override;
+  void executeModule(ScriptModule) override;
+
+ private:
+  ModulatorImpl(RefPtr<ScriptState>, WebTaskRunner*, ResourceFetcher*);
+
+  RefPtr<ScriptState> m_scriptState;
+  std::unique_ptr<WebTaskRunner> m_taskRunner;
+  Member<ResourceFetcher> m_fetcher;
+  Member<ModuleMap> m_map;
+  Member<ModuleScriptLoaderRegistry> m_loaderRegistry;
+  Member<ModuleTreeLinkerRegistry> m_treeLinkerRegistry;
+  Member<ScriptModuleResolver> m_scriptModuleResolver;
+};
+
+}  // namespace blink
+
+#endif