CSS Custom Properties (Variables)

Source/core/css/CSSVariableValue.h

+// Copyright 2015 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 CSSVariableValue_h
+#define CSSVariableValue_h
+
+#include "core/css/CSSValue.h"
+#include "core/css/CSSVariableData.h"
+#include "wtf/RefPtr.h"
+#include "wtf/text/AtomicString.h"
+
+namespace blink {
+
+class CSSVariableValue : public CSSValue {

[alancutter (OOO until 2018), 2015/06/26 06:56:07]

I'd call this CSSCustomPropertyValue to stay close to spec concepts.

+public:
+    static PassRefPtrWillBeRawPtr<CSSVariableValue> create(const AtomicString& name, PassRefPtr<CSSVariableData> value)
+    {
+        return adoptRefWillBeNoop(new CSSVariableValue(name, value));
+    }
+
+    static PassRefPtrWillBeRawPtr<CSSVariableValue> create(const AtomicString& name, CSSValueID id)
+    {
+        return adoptRefWillBeNoop(new CSSVariableValue(name, id));
+    }
+
+    const AtomicString& name() const { return m_name; }
+    CSSVariableData* value() const { return m_value.get(); }
+    CSSValueID id() const { return m_valueId; }
+
+    bool equals(const CSSVariableValue& other) const { return this == &other; }
+
+    void traceAfterDispatch(Visitor* visitor) { CSSValue::traceAfterDispatch(visitor); }
+
+private:
+    CSSVariableValue(const AtomicString& name, CSSValueID id)
+        : CSSValue(VariableClass)
+        , m_name(name)
+        , m_value(nullptr)
+        , m_valueId(id)
+    {
+        ASSERT(id == CSSValueInherit || id == CSSValueInitial);
+    }
+
+        CSSVariableValue(const AtomicString& name, PassRefPtr<CSSVariableData> value)
+        : CSSValue(VariableClass)
+        , m_name(name)
+        , m_value(value)
+        , m_valueId(CSSValueInternalVariableValue)
+    {
+    }
+
+    const AtomicString m_name;
+    RefPtr<CSSVariableData> m_value;
+    CSSValueID m_valueId;
+};
+
+DEFINE_CSS_VALUE_TYPE_CASTS(CSSVariableValue, isVariableValue());
+
+} // namespace blink
+
+#endif // CSSVariableValue_h