Move common gradient attribute collection to SVGGradientElement

third_party/WebKit/Source/core/svg/SVGGradientElement.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) 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.
  *
  * 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/svg/SVGGradientElement.h"
 
 #include "core/dom/Attribute.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/StyleChangeReason.h"
 #include "core/layout/svg/LayoutSVGResourceContainer.h"
+#include "core/svg/GradientAttributes.h"
 #include "core/svg/SVGStopElement.h"
 #include "core/svg/SVGTransformList.h"
 
 namespace blink {
 
 template <>
 const SVGEnumerationStringEntries&
 getStaticStringEntries<SVGSpreadMethodType>() {
   DEFINE_STATIC_LOCAL(SVGEnumerationStringEntries, entries, ());
   if (entries.isEmpty()) {
@@ skipping 74 matching lines @@
   SVGElement::childrenChanged(change);
 
   if (change.byParser)
     return;
 
   if (LayoutObject* object = layoutObject())
     object->setNeedsLayoutAndFullPaintInvalidation(
         LayoutInvalidationReason::ChildChanged);
 }
 
-Vector<Gradient::ColorStop> SVGGradientElement::buildStops() {
+void SVGGradientElement::collectCommonAttributes(
+    GradientAttributes& attributes) const {
+  if (!attributes.hasSpreadMethod() && spreadMethod()->isSpecified())
+    attributes.setSpreadMethod(spreadMethod()->currentValue()->enumValue());
+
+  if (!attributes.hasGradientUnits() && gradientUnits()->isSpecified())
+    attributes.setGradientUnits(gradientUnits()->currentValue()->enumValue());
+
+  if (!attributes.hasGradientTransform() &&
+      hasTransform(SVGElement::ExcludeMotionTransform)) {
+    attributes.setGradientTransform(
+        calculateTransform(SVGElement::ExcludeMotionTransform));
+  }
+
+  if (!attributes.hasStops()) {
+    const Vector<Gradient::ColorStop>& stops(buildStops());
+    if (!stops.isEmpty())
+      attributes.setStops(stops);
+  }
+}
+
+const SVGGradientElement* SVGGradientElement::referencedElement() const {
+  // Respect xlink:href, take attributes from referenced element.
+  Element* referencedElement =
+      targetElementFromIRIString(hrefString(), treeScope());
+  if (!referencedElement || !isSVGGradientElement(*referencedElement))
+    return nullptr;
+  return toSVGGradientElement(referencedElement);
+}
+
+Vector<Gradient::ColorStop> SVGGradientElement::buildStops() const {
   Vector<Gradient::ColorStop> stops;
 
   float previousOffset = 0.0f;
   for (const SVGStopElement& stop :
        Traversal<SVGStopElement>::childrenOf(*this)) {
     // Figure out right monotonic offset.
     float offset = stop.offset()->currentValue()->value();
     offset = std::min(std::max(previousOffset, offset), 1.0f);
     previousOffset = offset;
 
     stops.push_back(
         Gradient::ColorStop(offset, stop.stopColorIncludingOpacity()));
   }
   return stops;
 }
 
 }  // namespace blink