[ES6 modules] Introduce ModulatorImpl

third_party/WebKit/Source/core/dom/ModulatorImpl.h

Index: third_party/WebKit/Source/core/dom/ModulatorImpl.h
diff --git a/third_party/WebKit/Source/core/dom/ModulatorImpl.h b/third_party/WebKit/Source/core/dom/ModulatorImpl.h
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+// 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/ScriptWrappable.h"
+#include "bindings/core/v8/TraceWrapperMember.h"
+#include "bindings/core/v8/V8PerIsolateData.h"
+#include "core/dom/Modulator.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class Document;
+class ExecutionContext;
+class ModuleMap;
+class ModuleScriptLoaderRegistry;
+class ResourceFetcher;
+class ScriptState;
+class WebTaskRunner;
+
+// ModulatorImpl is the implementation of Modulator interface, which represents
+// "environment settings object" concept for module scripts.
+// ModulatorImpl serves as the backplane for tieing all ES6 module algorithm
+// components together.
+class ModulatorImpl final : public Modulator {
+ public:
+  static ModulatorImpl* Create(RefPtr<ScriptState>, Document&);
+
+  virtual ~ModulatorImpl();
+  DECLARE_TRACE();
+  DECLARE_VIRTUAL_TRACE_WRAPPERS();
+
+ private:
+  // Implements Modulator
+
+  ScriptModuleResolver* GetScriptModuleResolver() override {
+    return script_module_resolver_.Get();
+  }
+  WebTaskRunner* TaskRunner() override { return task_runner_.Get(); }
+  ReferrerPolicy GetReferrerPolicy() override;
+  SecurityOrigin* GetSecurityOrigin() override;
+
+  void FetchTree(const ModuleScriptFetchRequest&, ModuleTreeClient*) override;
+  void FetchTreeInternal(const ModuleScriptFetchRequest&,
+                         const AncestorList&,
+                         ModuleGraphLevel,
+                         ModuleTreeClient*) override;
+  void FetchSingle(const ModuleScriptFetchRequest&,
+                   ModuleGraphLevel,
+                   SingleModuleClient*) override;
+  ModuleScript* GetFetchedModuleScript(const KURL&) override;
+  void FetchNewSingleModule(const ModuleScriptFetchRequest&,
+                            ModuleGraphLevel,
+                            ModuleScriptLoaderClient*) override;
+  ScriptModule CompileModule(const String& script,
+                             const String& url_str,
+                             AccessControlStatus) override;
+  ScriptValue InstantiateModule(ScriptModule) override;
+  Vector<String> ModuleRequestsFromScriptModule(ScriptModule) override;
+
+  ModulatorImpl(RefPtr<ScriptState>, RefPtr<WebTaskRunner>, ResourceFetcher*);
+
+  ExecutionContext* GetExecutionContext() const;
+
+  RefPtr<ScriptState> script_state_;
+  RefPtr<WebTaskRunner> task_runner_;
+  Member<ResourceFetcher> fetcher_;
+  TraceWrapperMember<ModuleMap> map_;
+  Member<ModuleScriptLoaderRegistry> loader_registry_;
+  Member<ScriptModuleResolver> script_module_resolver_;
+};
+
+}  // namespace blink
+
+#endif