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      1 /*
      2  * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis (at) kde.org>
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  */
     20 
     21 #include "config.h"
     22 
     23 #include "core/svg/SVGGElement.h"
     24 
     25 #include "SVGNames.h"
     26 #include "core/rendering/svg/RenderSVGHiddenContainer.h"
     27 #include "core/rendering/svg/RenderSVGResource.h"
     28 #include "core/rendering/svg/RenderSVGTransformableContainer.h"
     29 #include "core/svg/SVGElementInstance.h"
     30 
     31 namespace WebCore {
     32 
     33 // Animated property definitions
     34 DEFINE_ANIMATED_BOOLEAN(SVGGElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
     35 
     36 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGGElement)
     37     REGISTER_LOCAL_ANIMATED_PROPERTY(externalResourcesRequired)
     38     REGISTER_PARENT_ANIMATED_PROPERTIES(SVGGraphicsElement)
     39 END_REGISTER_ANIMATED_PROPERTIES
     40 
     41 SVGGElement::SVGGElement(const QualifiedName& tagName, Document* document, ConstructionType constructionType)
     42     : SVGGraphicsElement(tagName, document, constructionType)
     43 {
     44     ASSERT(hasTagName(SVGNames::gTag));
     45     ScriptWrappable::init(this);
     46     registerAnimatedPropertiesForSVGGElement();
     47 }
     48 
     49 PassRefPtr<SVGGElement> SVGGElement::create(const QualifiedName& tagName, Document* document)
     50 {
     51     return adoptRef(new SVGGElement(tagName, document));
     52 }
     53 
     54 bool SVGGElement::isSupportedAttribute(const QualifiedName& attrName)
     55 {
     56     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     57     if (supportedAttributes.isEmpty())
     58         SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
     59     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
     60 }
     61 
     62 void SVGGElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     63 {
     64     if (!isSupportedAttribute(name)) {
     65         SVGGraphicsElement::parseAttribute(name, value);
     66         return;
     67     }
     68 
     69     if (SVGLangSpace::parseAttribute(name, value))
     70         return;
     71 
     72     ASSERT_NOT_REACHED();
     73 }
     74 
     75 void SVGGElement::svgAttributeChanged(const QualifiedName& attrName)
     76 {
     77     if (!isSupportedAttribute(attrName)) {
     78         SVGGraphicsElement::svgAttributeChanged(attrName);
     79         return;
     80     }
     81 
     82     SVGElementInstance::InvalidationGuard invalidationGuard(this);
     83 
     84     if (RenderObject* renderer = this->renderer())
     85         RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
     86 }
     87 
     88 RenderObject* SVGGElement::createRenderer(RenderStyle* style)
     89 {
     90     // SVG 1.1 testsuite explicitely uses constructs like <g display="none"><linearGradient>
     91     // We still have to create renderers for the <g> & <linearGradient> element, though the
     92     // subtree may be hidden - we only want the resource renderers to exist so they can be
     93     // referenced from somewhere else.
     94     if (style->display() == NONE)
     95         return new RenderSVGHiddenContainer(this);
     96 
     97     return new RenderSVGTransformableContainer(this);
     98 }
     99 
    100 bool SVGGElement::rendererIsNeeded(const NodeRenderingContext&)
    101 {
    102     // Unlike SVGElement::rendererIsNeeded(), we still create renderers, even if
    103     // display is set to 'none' - which is special to SVG <g> container elements.
    104     return parentOrShadowHostElement() && parentOrShadowHostElement()->isSVGElement();
    105 }
    106 
    107 }
    108