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

third_party/WebKit/Source/core/style/StyleVariableData.cpp

-// 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.
-
-#include "core/style/StyleVariableData.h"
-
-#include "core/style/DataEquivalency.h"
-
-namespace blink {
-
-bool StyleVariableData::operator==(const StyleVariableData& other) const
-{
-    // It's technically possible for divergent roots to be value-equal,
-    // but unlikely. This equality operator is used for optimization purposes
-    // so it's OK to be occasionally wrong.
-    // TODO(shanestephens): Rename this to something that indicates it may not
-    // always return equality.
-    if (m_root != other.m_root)
-        return false;
-
-    if (m_data.size() != other.m_data.size())
-        return false;
-
-    for (const auto& iter : m_data) {
-        RefPtr<CSSVariableData> otherData = other.m_data.get(iter.key);
-        if (!dataEquivalent(iter.value, otherData))
-            return false;
-    }
-
-    return true;
-}
-
-StyleVariableData::StyleVariableData(StyleVariableData& other)
-{
-    if (!other.m_root) {
-        m_root = &other;
-    } else {
-        m_data = other.m_data;
-        m_registeredData = other.m_registeredData;
-        m_root = other.m_root;
-    }
-}
-
-CSSVariableData* StyleVariableData::getVariable(const AtomicString& name) const
-{
-    auto result = m_data.find(name);
-    if (result == m_data.end() && m_root)
-        return m_root->getVariable(name);
-    if (result == m_data.end())
-        return nullptr;
-    return result->value.get();
-}
-
-void StyleVariableData::setRegisteredInheritedProperty(const AtomicString& name, const CSSValue* parsedValue)
-{
-    m_registeredData.set(name, const_cast<CSSValue*>(parsedValue));
-}
-
-void StyleVariableData::removeVariable(const AtomicString& name)
-{
-    m_data.set(name, nullptr);
-    auto iterator = m_registeredData.find(name);
-    if (iterator != m_registeredData.end())
-        iterator->value = nullptr;
-}
-
-std::unique_ptr<HashMap<AtomicString, RefPtr<CSSVariableData>>> StyleVariableData::getVariables() const
-{
-    std::unique_ptr<HashMap<AtomicString, RefPtr<CSSVariableData>>> result;
-    if (m_root) {
-        result.reset(new HashMap<AtomicString, RefPtr<CSSVariableData>>(m_root->m_data));
-        for (auto it = m_data.begin(); it != m_data.end(); ++it)
-            result->set(it->key, it->value);
-    } else {
-        result.reset(new HashMap<AtomicString, RefPtr<CSSVariableData>>(m_data));
-    }
-    return result;
-}
-
-} // namespace blink