1/*
2 * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@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
31namespace WebCore {
32
33// Animated property definitions
34DEFINE_ANIMATED_BOOLEAN(SVGGElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
35
36BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGGElement)
37    REGISTER_LOCAL_ANIMATED_PROPERTY(externalResourcesRequired)
38    REGISTER_PARENT_ANIMATED_PROPERTIES(SVGGraphicsElement)
39END_REGISTER_ANIMATED_PROPERTIES
40
41SVGGElement::SVGGElement(Document& document, ConstructionType constructionType)
42    : SVGGraphicsElement(SVGNames::gTag, document, constructionType)
43{
44    ScriptWrappable::init(this);
45    registerAnimatedPropertiesForSVGGElement();
46}
47
48PassRefPtr<SVGGElement> SVGGElement::create(Document& document)
49{
50    return adoptRef(new SVGGElement(document));
51}
52
53bool SVGGElement::isSupportedAttribute(const QualifiedName& attrName)
54{
55    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
56    if (supportedAttributes.isEmpty())
57        SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
58    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
59}
60
61void SVGGElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
62{
63    if (!isSupportedAttribute(name)) {
64        SVGGraphicsElement::parseAttribute(name, value);
65        return;
66    }
67
68    ASSERT_NOT_REACHED();
69}
70
71void SVGGElement::svgAttributeChanged(const QualifiedName& attrName)
72{
73    if (!isSupportedAttribute(attrName)) {
74        SVGGraphicsElement::svgAttributeChanged(attrName);
75        return;
76    }
77
78    SVGElementInstance::InvalidationGuard invalidationGuard(this);
79
80    if (RenderObject* renderer = this->renderer())
81        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
82}
83
84RenderObject* SVGGElement::createRenderer(RenderStyle* style)
85{
86    // SVG 1.1 testsuite explicitely uses constructs like <g display="none"><linearGradient>
87    // We still have to create renderers for the <g> & <linearGradient> element, though the
88    // subtree may be hidden - we only want the resource renderers to exist so they can be
89    // referenced from somewhere else.
90    if (style->display() == NONE)
91        return new RenderSVGHiddenContainer(this);
92
93    return new RenderSVGTransformableContainer(this);
94}
95
96bool SVGGElement::rendererIsNeeded(const RenderStyle&)
97{
98    // Unlike SVGElement::rendererIsNeeded(), we still create renderers, even if
99    // display is set to 'none' - which is special to SVG <g> container elements.
100    return parentOrShadowHostElement() && parentOrShadowHostElement()->isSVGElement();
101}
102
103}
104