Allow determining if an SVG value has been specified

Source/core/svg/SVGLinearGradientElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. 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
@@ skipping 99 matching lines @@
         renderer->invalidateCacheAndMarkForLayout();
 }
 
 RenderObject* SVGLinearGradientElement::createRenderer(RenderStyle*)
 {
     return new RenderSVGResourceLinearGradient(this);
 }
 
 static void setGradientAttributes(SVGGradientElement* element, LinearGradientAttributes& attributes, bool isLinear = true)
 {
-    if (!attributes.hasSpreadMethod() && element->hasAttribute(SVGNames::spreadMethodAttr))
+    if (!attributes.hasSpreadMethod() && element->spreadMethodSpecified())
         attributes.setSpreadMethod(element->spreadMethodCurrentValue());
 
-    if (!attributes.hasGradientUnits() && element->hasAttribute(SVGNames::gradientUnitsAttr))
+    if (!attributes.hasGradientUnits() && element->gradientUnitsSpecified())
         attributes.setGradientUnits(element->gradientUnitsCurrentValue());
 
-    if (!attributes.hasGradientTransform() && element->hasAttribute(SVGNames::gradientTransformAttr)) {
+    if (!attributes.hasGradientTransform() && element->gradientTransformSpecified()) {
         AffineTransform transform;
         element->gradientTransformCurrentValue().concatenate(transform);
         attributes.setGradientTransform(transform);
     }
 
     if (!attributes.hasStops()) {
         const Vector<Gradient::ColorStop>& stops(element->buildStops());
         if (!stops.isEmpty())
             attributes.setStops(stops);
     }
 
     if (isLinear) {
         SVGLinearGradientElement* linear = toSVGLinearGradientElement(element);
 
-        if (!attributes.hasX1() && element->hasAttribute(SVGNames::x1Attr))
+        if (!attributes.hasX1() && linear->x1()->isSpecified())
             attributes.setX1(linear->x1()->currentValue());
 
-        if (!attributes.hasY1() && element->hasAttribute(SVGNames::y1Attr))
+        if (!attributes.hasY1() && linear->y1()->isSpecified())
             attributes.setY1(linear->y1()->currentValue());
 
-        if (!attributes.hasX2() && element->hasAttribute(SVGNames::x2Attr))
+        if (!attributes.hasX2() && linear->x2()->isSpecified())
             attributes.setX2(linear->x2()->currentValue());
 
-        if (!attributes.hasY2() && element->hasAttribute(SVGNames::y2Attr))
+        if (!attributes.hasY2() && linear->y2()->isSpecified())
             attributes.setY2(linear->y2()->currentValue());
     }
 }
 
 bool SVGLinearGradientElement::collectGradientAttributes(LinearGradientAttributes& attributes)
 {
     if (!renderer())
         return false;
 
     HashSet<SVGGradientElement*> processedGradients;
@@ skipping 28 matching lines @@
 
 bool SVGLinearGradientElement::selfHasRelativeLengths() const
 {
     return m_x1->currentValue()->isRelative()
         || m_y1->currentValue()->isRelative()
         || m_x2->currentValue()->isRelative()
         || m_y2->currentValue()->isRelative();
 }
 
 }