[Experimental] CSSSerializer Proof-of-concept

third_party/WebKit/Source/core/css/CSSCalculationValue.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/css/CSSCalculationValue.h"
 
 #include "core/css/CSSPrimitiveValueMappings.h"
 #include "core/css/resolver/StyleResolver.h"
+#include "core/css/serializer/CSSDeserializeStream.h"
+#include "core/css/serializer/CSSSerializeStream.h"
 #include "wtf/MathExtras.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/text/StringBuilder.h"
 
 static const int maxExpressionDepth = 100;
 
 enum ParseState {
     OK,
     TooDeep,
     NoMoreTokens
@@ skipping 210 matching lines @@
 
         return compareCSSValuePtr(m_value, static_cast<const CSSCalcPrimitiveValue&>(other).m_value);
     }
 
     Type type() const override { return CssCalcPrimitiveValue; }
     CSSPrimitiveValue::UnitType typeWithCalcResolved() const override
     {
         return m_value->typeWithCalcResolved();
     }
 
+    void serialize(CSSSerializeStream* stream) const override
+    {
+        CSSCalcExpressionNode::serialize(stream);
+        m_value->serialize(stream);
+    }
+    
+    static PassRefPtrWillBeRawPtr<CSSCalcPrimitiveValue> deserializeAfterDispatch(CalculationCategory category, bool isInteger, CSSDeserializeStream* stream)
+    {
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> value = stream->readNullableRef<CSSPrimitiveValue>();
+        return create(value.release(), isInteger);
+    }
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         visitor->trace(m_value);
         CSSCalcExpressionNode::trace(visitor);
     }
 
 private:
     CSSCalcPrimitiveValue(PassRefPtrWillBeRawPtr<CSSPrimitiveValue> value, bool isInteger)
         : CSSCalcExpressionNode(unitCategory(value->typeWithCalcResolved()), isInteger)
@@ skipping 247 matching lines @@
             return CSSPrimitiveValue::UnitType::Hertz;
         case CalcPercentLength:
         case CalcPercentNumber:
         case CalcOther:
             return CSSPrimitiveValue::UnitType::Unknown;
         }
         ASSERT_NOT_REACHED();
         return CSSPrimitiveValue::UnitType::Unknown;
     }
 
+    void serialize(CSSSerializeStream* stream) const override
+    {
+        CSSCalcExpressionNode::serialize(stream);
+        m_leftSide->serialize(stream);
+        m_rightSide->serialize(stream);
+        stream->writeEnumAsInt<CalcOperator>(m_operator);
+    }
+
+    static PassRefPtrWillBeRawPtr<CSSCalcBinaryOperation> deserializeAfterDispatch(CalculationCategory category, bool isInteger, CSSDeserializeStream* stream)
+    {
+        RefPtrWillBeRawPtr<CSSCalcExpressionNode> leftSide = CSSCalcExpressionNode::deserialize(stream);
+        RefPtrWillBeRawPtr<CSSCalcExpressionNode> rightSide = CSSCalcExpressionNode::deserialize(stream);
+        CalcOperator calcOperator = stream->readIntAsEnum<CalcOperator>();
+        return adoptRefWillBeNoop(new CSSCalcBinaryOperation(leftSide.release(), rightSide.release(), calcOperator, category));
+    }
+
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         visitor->trace(m_leftSide);
         visitor->trace(m_rightSide);
         CSSCalcExpressionNode::trace(visitor);
     }
 
 private:
     CSSCalcBinaryOperation(PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> leftSide, PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> rightSide, CalcOperator op, CalculationCategory category)
         : CSSCalcExpressionNode(category, isIntegerResult(leftSide.get(), rightSide.get(), op))
@@ skipping 181 matching lines @@
 }
 
 PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> CSSCalcValue::createExpressionNode(double pixels, double percent)
 {
     return createExpressionNode(
         createExpressionNode(CSSPrimitiveValue::create(pixels, CSSPrimitiveValue::UnitType::Pixels), pixels == trunc(pixels)),
         createExpressionNode(CSSPrimitiveValue::create(percent, CSSPrimitiveValue::UnitType::Percentage), percent == trunc(percent)),
         CalcAdd);
 }
 
+void CSSCalcExpressionNode::serialize(CSSSerializeStream* stream) const
+{
+    stream->writeEnumAsInt<Type>(type());
+    stream->writeEnumAsInt<CalculationCategory>(m_category);
+    stream->writeBool(m_isInteger);
+}
+
+PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> CSSCalcExpressionNode::deserialize(CSSDeserializeStream* stream)
+{
+    Type type = stream->readIntAsEnum<Type>();
+    CalculationCategory category = stream->readIntAsEnum<CalculationCategory>();    
+    bool isInteger = stream->readBool();
+    
+    switch (type) {
+    case CssCalcPrimitiveValue:
+        return CSSCalcPrimitiveValue::deserializeAfterDispatch(category, isInteger, stream);
+    case CssCalcBinaryOperation:
+        return CSSCalcBinaryOperation::deserializeAfterDispatch(category, isInteger, stream);
+    default:
+        ASSERT_NOT_REACHED();
+    }
+}
+
 PassRefPtrWillBeRawPtr<CSSCalcValue> CSSCalcValue::create(const CSSParserTokenRange& tokens, ValueRange range)
 {
     CSSCalcExpressionNodeParser parser;
     RefPtrWillBeRawPtr<CSSCalcExpressionNode> expression = parser.parseCalc(tokens);
 
     return expression ? adoptRefWillBeNoop(new CSSCalcValue(expression, range)) : nullptr;
 }
 
 PassRefPtrWillBeRawPtr<CSSCalcValue> CSSCalcValue::create(PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> expression, ValueRange range)
 {
     return adoptRefWillBeNoop(new CSSCalcValue(expression, range));
 }
 
+void CSSCalcValue::serialize(CSSSerializeStream* stream) const
+{
+    m_expression->serialize(stream);
+    stream->writeBool(m_nonNegative);
+}
+
+PassRefPtrWillBeRawPtr<CSSCalcValue> CSSCalcValue::deserialize(CSSDeserializeStream* stream)
+{
+    RefPtrWillBeRawPtr<CSSCalcExpressionNode> expression = CSSCalcExpressionNode::deserialize(stream);
+    bool nonNegative = stream->readBool();
+    return create(expression.release(), nonNegative ? ValueRangeNonNegative : ValueRangeAll);
+}
+
 } // namespace blink