1 /*
2 * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2006, 2007 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/SVGStopElement.h"
24
25 #include "core/rendering/svg/RenderSVGGradientStop.h"
26 #include "core/rendering/svg/RenderSVGResource.h"
27
28 namespace WebCore {
29
SVGStopElement(Document & document)30 inline SVGStopElement::SVGStopElement(Document& document)
31 : SVGElement(SVGNames::stopTag, document)
32 , m_offset(SVGAnimatedNumber::create(this, SVGNames::offsetAttr, SVGNumberAcceptPercentage::create()))
33 {
34 ScriptWrappable::init(this);
35
36 addToPropertyMap(m_offset);
37 }
38
DEFINE_NODE_FACTORY(SVGStopElement)39 DEFINE_NODE_FACTORY(SVGStopElement)
40
41 bool SVGStopElement::isSupportedAttribute(const QualifiedName& attrName)
42 {
43 DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
44 if (supportedAttributes.isEmpty())
45 supportedAttributes.add(SVGNames::offsetAttr);
46 return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
47 }
48
parseAttribute(const QualifiedName & name,const AtomicString & value)49 void SVGStopElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
50 {
51 if (!isSupportedAttribute(name)) {
52 SVGElement::parseAttribute(name, value);
53 return;
54 }
55
56 SVGParsingError parseError = NoError;
57
58 if (name == SVGNames::offsetAttr)
59 m_offset->setBaseValueAsString(value, parseError);
60 else
61 ASSERT_NOT_REACHED();
62
63 reportAttributeParsingError(parseError, name, value);
64 }
65
svgAttributeChanged(const QualifiedName & attrName)66 void SVGStopElement::svgAttributeChanged(const QualifiedName& attrName)
67 {
68 if (!isSupportedAttribute(attrName)) {
69 SVGElement::svgAttributeChanged(attrName);
70 return;
71 }
72
73 SVGElement::InvalidationGuard invalidationGuard(this);
74
75 if (!renderer())
76 return;
77
78 if (attrName == SVGNames::offsetAttr) {
79 RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer());
80 return;
81 }
82
83 ASSERT_NOT_REACHED();
84 }
85
createRenderer(RenderStyle *)86 RenderObject* SVGStopElement::createRenderer(RenderStyle*)
87 {
88 return new RenderSVGGradientStop(this);
89 }
90
rendererIsNeeded(const RenderStyle &)91 bool SVGStopElement::rendererIsNeeded(const RenderStyle&)
92 {
93 return true;
94 }
95
stopColorIncludingOpacity() const96 Color SVGStopElement::stopColorIncludingOpacity() const
97 {
98 RenderStyle* style = renderer() ? renderer()->style() : 0;
99 // FIXME: This check for null style exists to address Bug WK 90814, a rare crash condition in
100 // which the renderer or style is null. This entire class is scheduled for removal (Bug WK 86941)
101 // and we will tolerate this null check until then.
102 if (!style || !style->svgStyle())
103 return Color(Color::transparent); // Transparent black.
104
105 const SVGRenderStyle* svgStyle = style->svgStyle();
106 return svgStyle->stopColor().combineWithAlpha(svgStyle->stopOpacity());
107 }
108
109 }
110