[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 "core/dom/Modulator.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class ExecutionContext;
+class ModuleController;
+class ModuleMap;
+class ModuleScriptLoaderRegistry;
+class ModuleTreeLinkerRegistry;
+class ResourceFetcher;
+class ScriptModuleResolverImpl;
+class WebTaskRunner;
+
+class ModulatorImpl final : public GarbageCollectedFinalized<Modulator>,
+                            public Modulator {
+  USING_GARBAGE_COLLECTED_MIXIN(ModulatorImpl);
+
+ public:
+  static ModulatorImpl* create(ExecutionContext* executionContext,
+                               ModuleController* controller,
+                               ResourceFetcher* fetcher) {
+    return new ModulatorImpl(executionContext, controller, fetcher);
+  }
+  virtual ~ModulatorImpl();
+  DECLARE_TRACE();
+
+ private:
+  // Implements Modulator
+
+  ModuleController* moduleController() override {
+    return m_moduleController.get();
+  }
+  ScriptModuleResolver* scriptModuleResolver() override;
+  WebTaskRunner* taskRunner() override;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#fetch-a-module-script-tree
+  void fetchTree(const KURL&, const KURL& baseURL, ModuleTreeClient*) override;
+
+  // for internal use by this specification only as part of fetching a module
+  // script graph or preparing a script, and should not be used directly by
+  // other specifications."
+  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;
+
+ private:
+  ModulatorImpl(ExecutionContext*, ModuleController*, ResourceFetcher*);
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#internal-module-script-graph-fetching-procedure
+  void fetchTreeInternal(const KURL&, const KURL& baseURL, ModuleTreeClient*);
+
+  Member<ModuleMap> m_map;
+  Member<ExecutionContext> m_executionContext;
+  Member<ModuleController> m_moduleController;
+  Member<ResourceFetcher> m_fetcher;
+  Member<ModuleScriptLoaderRegistry> m_loaderRegistry;
+  Member<ModuleTreeLinkerRegistry> m_treeLinkerRegistry;
+  Member<ScriptModuleResolverImpl> m_scriptModuleResolver;
+};
+
+}  // namespace blink
+
+#endif