Allow determining if an SVG value has been specified

Source/core/svg/properties/SVGAnimatedPropertyMacros.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2010-2011. 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.
  *
@@ skipping 85 matching lines @@
 const SVGPropertyInfo* OwnerType::LowerProperty##PropertyInfo() { \
     DEFINE_STATIC_LOCAL(const SVGPropertyInfo, s_propertyInfo, \
                         (AnimatedPropertyTypeEnum, \
                          PropertyIsReadWrite, \
                          DOMAttribute, \
                          SVGDOMAttributeIdentifier, \
                          &OwnerType::synchronize##UpperProperty, \
                          &OwnerType::lookupOrCreate##UpperProperty##Wrapper)); \
     return &s_propertyInfo; \
 } \
+bool OwnerType::LowerProperty##Specified() const \
+{ \
+    if (TearOffType* wrapper = SVGAnimatedProperty::lookupWrapper<UseOwnerType, TearOffType>(this, LowerProperty##PropertyInfo())) { \
+        if (wrapper->isAnimating()) \
+            return true; \
+    } \
+    return hasAttribute(SVGDOMAttributeIdentifier); \
+} \
 PropertyType& OwnerType::LowerProperty##CurrentValue() const \
 { \
     if (TearOffType* wrapper = SVGAnimatedProperty::lookupWrapper<UseOwnerType, TearOffType>(this, LowerProperty##PropertyInfo())) { \
         if (wrapper->isAnimating()) \
             return wrapper->currentAnimatedValue(); \
     } \
     return m_##LowerProperty.value; \
 } \
 \
 PropertyType& OwnerType::LowerProperty##BaseValue() const \
@@ skipping 38 matching lines @@
 #define BEGIN_DECLARE_ANIMATED_PROPERTIES(OwnerType) \
 public: \
     static SVGAttributeToPropertyMap& attributeToPropertyMap(); \
     virtual SVGAttributeToPropertyMap& localAttributeToPropertyMap() const; \
     void registerAnimatedPropertiesFor##OwnerType(); \
     typedef OwnerType UseOwnerType;
 
 #define DECLARE_ANIMATED_PROPERTY(TearOffType, PropertyType, UpperProperty, LowerProperty) \
 public: \
     static const SVGPropertyInfo* LowerProperty##PropertyInfo(); \
+    bool LowerProperty##Specified() const; \
     PropertyType& LowerProperty##CurrentValue() const; \
     PropertyType& LowerProperty##BaseValue() const; \
     void set##UpperProperty##BaseValue(const PropertyType& type); \
     PassRefPtr<TearOffType> LowerProperty(); \
 \
 private: \
     void synchronize##UpperProperty(); \
     static PassRefPtr<SVGAnimatedProperty> lookupOrCreate##UpperProperty##Wrapper(SVGElement* maskedOwnerType); \
     static void synchronize##UpperProperty(SVGElement* maskedOwnerType); \
 \
     mutable SVGSynchronizableAnimatedProperty<PropertyType> m_##LowerProperty;
 
 #define END_DECLARE_ANIMATED_PROPERTIES \
     CleanUpAnimatedPropertiesCaller m_cleanupAnimatedPropertiesCaller;
 
 // List specific definition/declaration helpers
 #define DECLARE_ANIMATED_LIST_PROPERTY(TearOffType, PropertyType, UpperProperty, LowerProperty) \
 DECLARE_ANIMATED_PROPERTY(TearOffType, PropertyType, UpperProperty, LowerProperty) \
 void detachAnimated##UpperProperty##ListWrappers(unsigned newListSize) \
 { \
     if (TearOffType* wrapper = SVGAnimatedProperty::lookupWrapper<UseOwnerType, TearOffType>(this, LowerProperty##PropertyInfo())) \
         wrapper->detachListWrappers(newListSize); \
 }
 
 }
 
 #endif // SVGAnimatedPropertyMacros_h