[Experimental] CSSSerializer Proof-of-concept

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "core/css/CSSPrimitiveValue.h"
 
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/CSSHelper.h"
 #include "core/css/CSSMarkup.h"
 #include "core/css/CSSToLengthConversionData.h"
 #include "core/css/StyleSheetContents.h"
+#include "core/css/serializer/CSSDeserializeStream.h"
+#include "core/css/serializer/CSSSerializeStream.h"
 #include "core/dom/Node.h"
 #include "core/style/ComputedStyle.h"
 #include "platform/LayoutUnit.h"
 #include "platform/fonts/FontMetrics.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/ThreadSpecific.h"
 #include "wtf/Threading.h"
 #include "wtf/text/StringBuffer.h"
 #include "wtf/text/StringBuilder.h"
 
@@ skipping 808 matching lines @@
         return m_value.calc && other.m_value.calc && m_value.calc->equals(*other.m_value.calc);
     case UnitType::Chs:
     case UnitType::CalcPercentageWithNumber:
     case UnitType::CalcPercentageWithLength:
     case UnitType::QuirkyEms:
         return false;
     }
     return false;
 }
 
+PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPrimitiveValue::deserialize(CSSDeserializeStream* stream)
+{
+    RefPtrWillBeRawPtr<CSSValue> value = stream->readNullableRef<CSSValue>();
+    if (!value)
+        return nullptr;
+    return toCSSPrimitiveValue(value.get());
+}
+
+PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPrimitiveValue::deserializeAfterDispatch(CSSDeserializeStream* stream)
+{
+    UnitType type = static_cast<UnitType>(stream->readUnsigned());
+    switch (type) {
+    case UnitType::Calc: {
+        RefPtrWillBeRawPtr<CSSCalcValue> calcValue = CSSCalcValue::deserialize(stream);
+        return create(calcValue.release());
+    }
+    case UnitType::CalcPercentageWithNumber:
+    case UnitType::CalcPercentageWithLength:
+    case UnitType::Unknown:
+    default:
+        ASSERT_NOT_REACHED();
+        return nullptr;
+    case UnitType::Number:
+    case UnitType::Integer:
+    case UnitType::Percentage:
+    case UnitType::Ems:
+    case UnitType::QuirkyEms:
+    case UnitType::Exs:
+    case UnitType::Rems:
+    case UnitType::Chs:
+    case UnitType::Centimeters:
+    case UnitType::Millimeters:
+    case UnitType::Inches:
+    case UnitType::Points:
+    case UnitType::Picas:
+    case UnitType::UserUnits:
+    case UnitType::Degrees:
+    case UnitType::Radians:
+    case UnitType::Gradians:
+    case UnitType::Milliseconds:
+    case UnitType::Seconds:
+    case UnitType::Hertz:
+    case UnitType::Kilohertz:
+    case UnitType::Turns:
+    case UnitType::ViewportWidth:
+    case UnitType::ViewportHeight:
+    case UnitType::ViewportMin:
+    case UnitType::ViewportMax:
+    case UnitType::DotsPerPixel:
+    case UnitType::DotsPerInch:
+    case UnitType::DotsPerCentimeter:
+    case UnitType::Fraction:
+    case UnitType::Pixels: {
+        double num = stream->readDouble();
+        return create(num, type);
+    }
+    case UnitType::ValueID: {
+        unsigned valueID = stream->readUnsigned();
+        return createIdentifier(static_cast<CSSValueID>(valueID));
+    }
+    }
+}
+
+void CSSPrimitiveValue::serializeAfterDispatch(CSSSerializeStream* stream) const
+{
+    stream->writeEnumAsInt<UnitType>(type());
+    switch (type()) {
+    case UnitType::Calc:
+        cssCalcValue()->serialize(stream); 
+        break;
+    case UnitType::CalcPercentageWithNumber:
+    case UnitType::CalcPercentageWithLength:
+    case UnitType::Unknown:
+    default:
+        ASSERT_NOT_REACHED();
+        break;
+    case UnitType::Number:
+    case UnitType::Integer:
+    case UnitType::Percentage:
+    case UnitType::Ems:
+    case UnitType::QuirkyEms:
+    case UnitType::Exs:
+    case UnitType::Rems:
+    case UnitType::Chs:
+    case UnitType::Centimeters:
+    case UnitType::Millimeters:
+    case UnitType::Inches:
+    case UnitType::Points:
+    case UnitType::Picas:
+    case UnitType::UserUnits:
+    case UnitType::Degrees:
+    case UnitType::Radians:
+    case UnitType::Gradians:
+    case UnitType::Milliseconds:
+    case UnitType::Seconds:
+    case UnitType::Hertz:
+    case UnitType::Kilohertz:
+    case UnitType::Turns:
+    case UnitType::ViewportWidth:
+    case UnitType::ViewportHeight:
+    case UnitType::ViewportMin:
+    case UnitType::ViewportMax:
+    case UnitType::DotsPerPixel:
+    case UnitType::DotsPerInch:
+    case UnitType::DotsPerCentimeter:
+    case UnitType::Fraction:
+    case UnitType::Pixels:
+        stream->writeDouble(m_value.num);
+        break;
+    case UnitType::ValueID:
+        stream->writeUnsigned(static_cast<unsigned>(m_value.valueID));
+        break;
+    }
+}
+
 DEFINE_TRACE_AFTER_DISPATCH(CSSPrimitiveValue)
 {
 #if ENABLE(OILPAN)
     switch (type()) {
     case UnitType::Calc:
         visitor->trace(m_value.calc);
         break;
     default:
         break;
     }
 #endif
     CSSValue::traceAfterDispatch(visitor);
 }
 
 } // namespace blink