Web Animations API: Deferred computation of interpolated values

Source/core/css/CSSPrimitiveValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  *
  * 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.
  *
@@ skipping 139 matching lines @@
         UnitTypeViewportWidth,
         UnitTypeViewportHeight,
         UnitTypeViewportMin,
         UnitTypeViewportMax,
 
         // This value must come after the last length unit type to enable iteration over the length unit types.
         LengthUnitTypeCount,
     };
 
     typedef Vector<double, CSSPrimitiveValue::LengthUnitTypeCount> CSSLengthArray;
+    static void zeroLengthArray(CSSLengthArray&);
     void accumulateLengthArray(CSSLengthArray&, double multiplier = 1) const;
 
     // This enum follows the BisonCSSParser::Units enum augmented with UNIT_FREQUENCY for frequencies.
     enum UnitCategory {
         UNumber,
         UPercent,
         ULength,
         UAngle,
         UTime,
         UFrequency,
@@ skipping 14 matching lines @@
     bool isAttr() const { return m_primitiveUnitType == CSS_ATTR; }
     bool isCounter() const { return m_primitiveUnitType == CSS_COUNTER; }
     bool isFontIndependentLength() const { return m_primitiveUnitType >= CSS_PX && m_primitiveUnitType <= CSS_PC; }
     bool isFontRelativeLength() const
     {
         return m_primitiveUnitType == CSS_EMS
             || m_primitiveUnitType == CSS_EXS
             || m_primitiveUnitType == CSS_REMS
             || m_primitiveUnitType == CSS_CHS;
     }
+    bool isViewportPercentageLength() const { return isViewportPercentageLength(m_primitiveUnitType); }
     static bool isViewportPercentageLength(unsigned short type) { return type >= CSS_VW && type <= CSS_VMAX; }
     static bool isLength(unsigned short type)
     {
         return (type >= CSS_EMS && type <= CSS_PC) || type == CSS_REMS || type == CSS_CHS || isViewportPercentageLength(type);
     }
     bool isLength() const { return isLength(primitiveType()); }
     bool isNumber() const { return primitiveType() == CSS_NUMBER; }
     bool isPercentage() const { return primitiveType() == CSS_PERCENTAGE; }
     bool isPx() const { return primitiveType() == CSS_PX; }
     bool isRect() const { return m_primitiveUnitType == CSS_RECT; }
@@ skipping 224 matching lines @@
     } m_value;
 };
 
 typedef CSSPrimitiveValue::CSSLengthArray CSSLengthArray;
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSPrimitiveValue, isPrimitiveValue());
 
 } // namespace WebCore
 
 #endif // CSSPrimitiveValue_h