third_party/WebKit/Source/core/svg/SVGClipPathElement.cpp

/*
 * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Rob Buis <buis@kde.org>
 * Copyright (C) Research In Motion Limited 2009-2010. 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/SVGClipPathElement.h"

#include "core/layout/svg/LayoutSVGResourceClipper.h"

namespace blink {

inline SVGClipPathElement::SVGClipPathElement(Document& document)
    : SVGGraphicsElement(SVGNames::clipPathTag, document),
      m_clipPathUnits(SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>::create(
          this,
          SVGNames::clipPathUnitsAttr,
          SVGUnitTypes::kSvgUnitTypeUserspaceonuse)) {
  addToPropertyMap(m_clipPathUnits);
}

DEFINE_TRACE(SVGClipPathElement) {
  visitor->trace(m_clipPathUnits);
  SVGGraphicsElement::trace(visitor);
}

DEFINE_NODE_FACTORY(SVGClipPathElement)

void SVGClipPathElement::svgAttributeChanged(const QualifiedName& attrName) {
  if (attrName == SVGNames::clipPathUnitsAttr) {
    SVGElement::InvalidationGuard invalidationGuard(this);

    LayoutSVGResourceContainer* layoutObject =
        toLayoutSVGResourceContainer(this->layoutObject());
    if (layoutObject)
      layoutObject->invalidateCacheAndMarkForLayout();
    return;
  }

  SVGGraphicsElement::svgAttributeChanged(attrName);
}

void SVGClipPathElement::childrenChanged(const ChildrenChange& change) {
  SVGGraphicsElement::childrenChanged(change);

  if (change.byParser)
    return;

  if (LayoutObject* object = layoutObject())
    object->setNeedsLayoutAndFullPaintInvalidation(
        LayoutInvalidationReason::ChildChanged);
}

LayoutObject* SVGClipPathElement::createLayoutObject(const ComputedStyle&) {
  return new LayoutSVGResourceClipper(this);
}

}  // namespace blink