Basic implementation of @apply

third_party/WebKit/Source/core/css/CSSVariableData.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/css/CSSVariableData.h"
 
+#include "core/css/parser/CSSParser.h"
 #include "core/css/parser/CSSParserTokenRange.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
+const StylePropertySet* CSSVariableData::propertySet()
+{
+    ASSERT(!m_needsVariableResolution);
+    if (!m_cachedPropertySet) {
+        m_propertySet = CSSParser::parseCustomPropertySet(m_tokens);
+        m_cachedPropertySet = true;
+    }
+    return m_propertySet.get();
+}
+
 template<typename CharacterType> void CSSVariableData::updateTokens(const CSSParserTokenRange& range)
 {
     const CharacterType* currentOffset = m_backingString.getCharacters<CharacterType>();
     for (const CSSParserToken& token : range) {
         if (token.hasStringBacking()) {
             unsigned length = token.value().length();
             CSSParserString parserString;
             parserString.init(currentOffset, length);
             m_tokens.append(token.copyWithUpdatedString(parserString));
             currentOffset += length;
@@ skipping 26 matching lines @@
     }
     m_backingString = stringBuilder.toString();
     if (m_backingString.is8Bit())
         updateTokens<LChar>(range);
     else
         updateTokens<UChar>(range);
 }
 
 CSSVariableData::CSSVariableData(const CSSParserTokenRange& range, bool needsVariableResolution)
     : m_needsVariableResolution(needsVariableResolution)
+    , m_cachedPropertySet(false)
 {
     ASSERT(!range.atEnd());
     consumeAndUpdateTokens(range);
 }
 
 } // namespace blink