[ES6 modules] Introduce ModuleScript model object

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

Index: third_party/WebKit/Source/core/dom/ModuleScript.h
diff --git a/third_party/WebKit/Source/core/dom/ModuleScript.h b/third_party/WebKit/Source/core/dom/ModuleScript.h
new file mode 100644
index 0000000000000000000000000000000000000000..5efe745b3db767df8531fd460c6ba0047e8e33c9
--- /dev/null
+++ b/third_party/WebKit/Source/core/dom/ModuleScript.h
@@ -0,0 +1,98 @@
+// 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 ModuleScript_h
+#define ModuleScript_h
+
+#include "bindings/core/v8/ScriptModule.h"
+#include "core/CoreExport.h"
+#include "platform/heap/Handle.h"
+#include "platform/loader/fetch/ResourceLoaderOptions.h"
+#include "platform/weborigin/KURL.h"
+#include "public/platform/WebURLRequest.h"
+
+namespace blink {
+
+// https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-instantiation-state
+enum class ModuleInstantiationState {
+  Uninstantiated,
+  Errored,
+  Instantiated,
+};
+
+// ModuleScript is a model object for the "module script" spec concept.
+// https://html.spec.whatwg.org/multipage/webappapis.html#module-script
+class CORE_EXPORT ModuleScript final
+    : public GarbageCollectedFinalized<ModuleScript> {
+ public:
+  static ModuleScript* create(
+      ScriptModule record,
+      const KURL& baseURL,
+      const String& nonce,
+      ParserDisposition parserState,
+      WebURLRequest::FetchCredentialsMode credentialsMode) {
+    return new ModuleScript(record, baseURL, nonce, parserState,
+                            credentialsMode);
+  }
+  ~ModuleScript() = default;
+
+  ScriptModule& record() { return m_record; }
+  void clearRecord() { m_record = ScriptModule(); }
+  const KURL& baseURL() const { return m_baseURL; }
+
+  ParserDisposition parserState() const { return m_parserState; }
+  WebURLRequest::FetchCredentialsMode credentialsMode() const {
+    return m_credentialsMode;
+  }
+  const String& nonce() const { return m_nonce; }
+
+  ModuleInstantiationState instantiationState() const {
+    return m_instantiationState;
+  }
+
+  DECLARE_TRACE();
+
+ private:
+  ModuleScript(ScriptModule record,
+               const KURL& baseURL,
+               const String& nonce,
+               ParserDisposition parserState,
+               WebURLRequest::FetchCredentialsMode credentialsMode)
+      : m_record(record),
+        m_baseURL(baseURL),
+        m_nonce(nonce),
+        m_parserState(parserState),
+        m_credentialsMode(credentialsMode) {}
+
+  // Note: A "module script"'s "setttings object" is ommitted, as we currently
+  // always have access to the corresponding Modulator when operating on a
+  // ModuleScript instance.
+  // https://html.spec.whatwg.org/multipage/webappapis.html#settings-object
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-module-record
+  ScriptModule m_record;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-base-url
+  const KURL m_baseURL;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-instantiation-state
+  ModuleInstantiationState m_instantiationState =
+      ModuleInstantiationState::Uninstantiated;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-instantiation-error
+  // TODO(kouhei): Add a corresponding member.
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-nonce
+  const String m_nonce;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-parser
+  const ParserDisposition m_parserState;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-credentials-mode
+  const WebURLRequest::FetchCredentialsMode m_credentialsMode;
+};
+
+}  // namespace blink
+
+#endif