CSS Properties and Values API: Support non-inherited custom properties

third_party/WebKit/Source/core/style/StyleVariableData.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 StyleVariableData_h
-#define StyleVariableData_h
-
-#include "core/css/CSSValue.h"
-#include "core/css/CSSVariableData.h"
-#include "wtf/Forward.h"
-#include "wtf/HashMap.h"
-#include "wtf/RefCounted.h"
-#include "wtf/text/AtomicStringHash.h"
-
-namespace blink {
-
-class StyleVariableData : public RefCounted<StyleVariableData> {
-public:
-    static PassRefPtr<StyleVariableData> create() { return adoptRef(new StyleVariableData()); }
-
-    PassRefPtr<StyleVariableData> copy() { return adoptRef(new StyleVariableData(*this)); }
-
-    bool operator==(const StyleVariableData& other) const;
-    bool operator!=(const StyleVariableData& other) const { return !(*this == other); }
-
-    void setVariable(const AtomicString& name, PassRefPtr<CSSVariableData> value) { m_data.set(name, std::move(value)); }
-    CSSVariableData* getVariable(const AtomicString& name) const;
-    void removeVariable(const AtomicString&);
-
-    void setRegisteredInheritedProperty(const AtomicString&, const CSSValue*);
-    CSSValue* registeredInheritedProperty(const AtomicString& name) const { return m_registeredData.get(name); }
-
-    // This map will contain null pointers if variables are invalid due to
-    // cycles or referencing invalid variables without using a fallback.
-    // Note that this method is slow as a new map is constructed.
-    std::unique_ptr<HashMap<AtomicString, RefPtr<CSSVariableData>>> getVariables() const;
-private:
-    StyleVariableData()
-        : m_root(nullptr)
-        { }
-    StyleVariableData(StyleVariableData& other);
-
-    friend class CSSVariableResolver;
-
-    HashMap<AtomicString, RefPtr<CSSVariableData>> m_data;
-    HashMap<AtomicString, Persistent<CSSValue>> m_registeredData;
-    RefPtr<StyleVariableData> m_root;
-};
-
-} // namespace blink
-
-#endif // StyleVariableData_h