Basic implementation of @apply

third_party/WebKit/Source/core/css/parser/CSSVariableParser.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/parser/CSSVariableParser.h"
 
 #include "core/css/CSSCustomPropertyDeclaration.h"
 #include "core/css/parser/CSSParserTokenRange.h"
 #include "core/css/parser/CSSParserValues.h"
 
@@ skipping 29 matching lines @@
             }
             if (!classifyBlock(block, hasReferences, false))
                 return false;
             continue;
         }
 
         ASSERT(range.peek().getBlockType() != CSSParserToken::BlockEnd);
 
         const CSSParserToken& token = range.consume();
         switch (token.type()) {
+        case AtKeywordToken: {
+            // This might have false positives if the @apply doesn't actually match
+            // the syntax, but that just means we do extra computation work.
+            if (token.valueEqualsIgnoringASCIICase("apply"))
+                hasReferences = true;
+            break;
+        }
         case DelimiterToken: {
             if (token.delimiter() == '!' && isTopLevelBlock)
                 return false;
             break;
         }
         case RightParenthesisToken:
         case RightBraceToken:
         case RightBracketToken:
         case BadStringToken:
         case BadUrlToken:
@@ skipping 58 matching lines @@
     CSSValueID type = classifyVariableRange(range, hasReferences);
 
     if (type == CSSValueInvalid)
         return nullptr;
     if (type == CSSValueInternalVariableValue)
         return CSSCustomPropertyDeclaration::create(variableName, CSSVariableData::create(range, hasReferences));
     return CSSCustomPropertyDeclaration::create(variableName, type);
 }
 
 } // namespace blink