Allow determining if an SVG value has been specified

Source/core/svg/SVGPatternElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 150 matching lines @@
         object->setNeedsLayout();
 }
 
 RenderObject* SVGPatternElement::createRenderer(RenderStyle*)
 {
     return new RenderSVGResourcePattern(this);
 }
 
 static void setPatternAttributes(const SVGPatternElement* element, PatternAttributes& attributes)
 {
-    if (!attributes.hasX() && element->hasAttribute(SVGNames::xAttr))
+    if (!attributes.hasX() && element->x()->isSpecified())
         attributes.setX(element->x()->currentValue());
 
-    if (!attributes.hasY() && element->hasAttribute(SVGNames::yAttr))
+    if (!attributes.hasY() && element->y()->isSpecified())
         attributes.setY(element->y()->currentValue());
 
-    if (!attributes.hasWidth() && element->hasAttribute(SVGNames::widthAttr))
+    if (!attributes.hasWidth() && element->width()->isSpecified())
         attributes.setWidth(element->width()->currentValue());
 
-    if (!attributes.hasHeight() && element->hasAttribute(SVGNames::heightAttr))
+    if (!attributes.hasHeight() && element->height()->isSpecified())
         attributes.setHeight(element->height()->currentValue());
 
-    if (!attributes.hasViewBox() && element->hasAttribute(SVGNames::viewBoxAttr) && element->viewBox()->currentValue()->isValid())
+    if (!attributes.hasViewBox() && element->viewBox()->isSpecified() && element->viewBox()->currentValue()->isValid())
         attributes.setViewBox(element->viewBox()->currentValue()->value());
 
-    if (!attributes.hasPreserveAspectRatio() && element->hasAttribute(SVGNames::preserveAspectRatioAttr))
+    if (!attributes.hasPreserveAspectRatio() && element->preserveAspectRatioSpecified())
         attributes.setPreserveAspectRatio(element->preserveAspectRatioCurrentValue());
 
-    if (!attributes.hasPatternUnits() && element->hasAttribute(SVGNames::patternUnitsAttr))
+    if (!attributes.hasPatternUnits() && element->patternUnitsSpecified())
         attributes.setPatternUnits(element->patternUnitsCurrentValue());
 
-    if (!attributes.hasPatternContentUnits() && element->hasAttribute(SVGNames::patternContentUnitsAttr))
+    if (!attributes.hasPatternContentUnits() && element->patternContentUnitsSpecified())
         attributes.setPatternContentUnits(element->patternContentUnitsCurrentValue());
 
-    if (!attributes.hasPatternTransform() && element->hasAttribute(SVGNames::patternTransformAttr)) {
+    if (!attributes.hasPatternTransform() && element->patternTransformSpecified()) {
         AffineTransform transform;
         element->patternTransformCurrentValue().concatenate(transform);
         attributes.setPatternTransform(transform);
     }
 
     if (!attributes.hasPatternContentElement() && element->childElementCount())
         attributes.setPatternContentElement(element);
 }
 
 void SVGPatternElement::collectPatternAttributes(PatternAttributes& attributes) const
@@ skipping 30 matching lines @@
 
 bool SVGPatternElement::selfHasRelativeLengths() const
 {
     return m_x->currentValue()->isRelative()
         || m_y->currentValue()->isRelative()
         || m_width->currentValue()->isRelative()
         || m_height->currentValue()->isRelative();
 }
 
 }