Skeleton implementation of CSS Properties and Values API

third_party/WebKit/Source/core/css/PropertyRegistry.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 PropertyRegistry_h
+#define PropertyRegistry_h
+
+#include "core/css/CSSSyntaxDescriptor.h"
+#include "core/css/CSSValue.h"
+#include "core/css/CSSVariableData.h"
+#include "wtf/HashMap.h"
+#include "wtf/RefPtr.h"
+#include "wtf/text/AtomicString.h"
+#include "wtf/text/AtomicStringHash.h"
+
+namespace blink {
+
+class PropertyRegistry : public GarbageCollected<PropertyRegistry> {
+public:
+    static PropertyRegistry* create()
+    {
+        return new PropertyRegistry();
+    }
+
+    class Registration : public GarbageCollectedFinalized<Registration> {
+    public:
+        Registration(const CSSSyntaxDescriptor& syntax, bool inherits, const CSSValue* initial)
+        : m_syntax(syntax), m_inherits(inherits), m_initial(initial) { }
+
+        const CSSSyntaxDescriptor& syntax() const { return m_syntax; }
+        bool inherits() const { return m_inherits; }
+        const CSSValue* initial() const { return m_initial; }
+
+        DEFINE_INLINE_TRACE() { visitor->trace(m_initial); }
+
+    private:
+        const CSSSyntaxDescriptor m_syntax;
+        const bool m_inherits;
+        const Member<const CSSValue> m_initial;
+    };
+
+    void registerProperty(const AtomicString&, const CSSSyntaxDescriptor&, bool inherits, const CSSValue* initial);
+    void unregisterProperty(const AtomicString&);
+    const Registration* registration(const AtomicString&) const;
+
+    DEFINE_INLINE_TRACE() { visitor->trace(m_registrations); }
+
+private:
+    HeapHashMap<AtomicString, Member<Registration>> m_registrations;
+};
+
+} // namespace blink
+
+#endif // PropertyRegistry_h