Implement custom element construction and some 'define' checks

third_party/WebKit/Source/core/dom/custom/CustomElementsRegistry.h

 // Copyright 2016 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 CustomElementsRegistry_h
 #define CustomElementsRegistry_h
 
+#include "bindings/core/v8/ScopedPersistent.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
+#include "platform/heap/Handle.h"
+#include "v8.h"
+#include "wtf/HashSet.h"
+#include "wtf/text/AtomicString.h"
+#include "wtf/text/AtomicStringHash.h"
 
 namespace blink {
 
+class CustomElementDefinition;
 class ElementRegistrationOptions;
 class ExceptionState;
 class ScriptState;
 class ScriptValue;
+class V0CustomElementRegistrationContext;
 
 class CORE_EXPORT CustomElementsRegistry final
-    : public GarbageCollected<CustomElementsRegistry>
+    : public GarbageCollectedFinalized<CustomElementsRegistry>
     , public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static CustomElementsRegistry* create()
-    {
-        return new CustomElementsRegistry();
-    }
+    using Id = uint32_t;
+    static CustomElementsRegistry* create(
+        ScriptState*,
+        V0CustomElementRegistrationContext*);
 
-    void define(ScriptState*, const AtomicString& name,
-        const ScriptValue& constructor, const ElementRegistrationOptions&,
+    void define(
+        ScriptState*,
+        const AtomicString& name,
+        const ScriptValue& constructor,
+        const ElementRegistrationOptions&,
         ExceptionState&);
 
+    CustomElementDefinition* definitionForConstructor(
+        ScriptState*,
+        v8::Local<v8::Value> constructor);
+    v8::Local<v8::Object> prototype(
+        ScriptState*,
+        const CustomElementDefinition&);
+
+    // TODO(dominicc): Remove this when V0CustomElements are removed.
+    bool nameIsDefined(const AtomicString& name) const;
+
     DECLARE_TRACE();
 
 private:
-    CustomElementsRegistry();
+    CustomElementsRegistry(const V0CustomElementRegistrationContext*);
+
+    // Retrieves the Map which, given a constructor, contains the id
+    // of the definition; or given an id, contains the prototype.
+    // Returns true if the map was retrieved; false if the map was
+    // not initialized yet.
+    v8::Local<v8::Map> idMap(ScriptState*);
+
+    bool idForConstructor(
+        ScriptState*,
+        v8::Local<v8::Value> constructor,
+        Id&) WARN_UNUSED_RETURN;
+
+    bool v0NameIsDefined(const AtomicString& name);
+
+    Member<const V0CustomElementRegistrationContext> m_v0;
+    HeapVector<Member<CustomElementDefinition>> m_definitions;
+    HashSet<AtomicString> m_names;
 };
 
 } // namespace blink
 
 #endif // CustomElementsRegistry_h