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      1 /*
      2  * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Rob Buis <buis (at) kde.org>
      4  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  */
     21 
     22 #include "config.h"
     23 
     24 #include "core/svg/SVGClipPathElement.h"
     25 
     26 #include "SVGNames.h"
     27 #include "core/rendering/svg/RenderSVGResourceClipper.h"
     28 #include "core/svg/SVGElementInstance.h"
     29 
     30 namespace WebCore {
     31 
     32 // Animated property definitions
     33 DEFINE_ANIMATED_ENUMERATION(SVGClipPathElement, SVGNames::clipPathUnitsAttr, ClipPathUnits, clipPathUnits, SVGUnitTypes::SVGUnitType)
     34 DEFINE_ANIMATED_BOOLEAN(SVGClipPathElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
     35 
     36 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGClipPathElement)
     37     REGISTER_LOCAL_ANIMATED_PROPERTY(clipPathUnits)
     38     REGISTER_LOCAL_ANIMATED_PROPERTY(externalResourcesRequired)
     39     REGISTER_PARENT_ANIMATED_PROPERTIES(SVGGraphicsElement)
     40 END_REGISTER_ANIMATED_PROPERTIES
     41 
     42 inline SVGClipPathElement::SVGClipPathElement(const QualifiedName& tagName, Document* document)
     43     : SVGGraphicsElement(tagName, document)
     44     , m_clipPathUnits(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)
     45 {
     46     ASSERT(hasTagName(SVGNames::clipPathTag));
     47     ScriptWrappable::init(this);
     48     registerAnimatedPropertiesForSVGClipPathElement();
     49 }
     50 
     51 PassRefPtr<SVGClipPathElement> SVGClipPathElement::create(const QualifiedName& tagName, Document* document)
     52 {
     53     return adoptRef(new SVGClipPathElement(tagName, document));
     54 }
     55 
     56 bool SVGClipPathElement::isSupportedAttribute(const QualifiedName& attrName)
     57 {
     58     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     59     if (supportedAttributes.isEmpty()) {
     60         SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
     61         supportedAttributes.add(SVGNames::clipPathUnitsAttr);
     62     }
     63     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
     64 }
     65 
     66 void SVGClipPathElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     67 {
     68     if (!isSupportedAttribute(name)) {
     69         SVGGraphicsElement::parseAttribute(name, value);
     70         return;
     71     }
     72 
     73     if (name == SVGNames::clipPathUnitsAttr) {
     74         SVGUnitTypes::SVGUnitType propertyValue = SVGPropertyTraits<SVGUnitTypes::SVGUnitType>::fromString(value);
     75         if (propertyValue > 0)
     76             setClipPathUnitsBaseValue(propertyValue);
     77         return;
     78     }
     79 
     80     if (SVGExternalResourcesRequired::parseAttribute(name, value))
     81         return;
     82 
     83     ASSERT_NOT_REACHED();
     84 }
     85 
     86 void SVGClipPathElement::svgAttributeChanged(const QualifiedName& attrName)
     87 {
     88     if (!isSupportedAttribute(attrName)) {
     89         SVGGraphicsElement::svgAttributeChanged(attrName);
     90         return;
     91     }
     92 
     93     SVGElementInstance::InvalidationGuard invalidationGuard(this);
     94 
     95     if (RenderObject* object = renderer())
     96         object->setNeedsLayout();
     97 }
     98 
     99 void SVGClipPathElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
    100 {
    101     SVGGraphicsElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
    102 
    103     if (changedByParser)
    104         return;
    105 
    106     if (RenderObject* object = renderer())
    107         object->setNeedsLayout();
    108 }
    109 
    110 RenderObject* SVGClipPathElement::createRenderer(RenderStyle*)
    111 {
    112     return new RenderSVGResourceClipper(this);
    113 }
    114 
    115 }
    116