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 #include "core/svg/SVGElementInstance.h"
28
29 namespace WebCore {
30
31 // Animated property definitions
DEFINE_ANIMATED_NUMBER(SVGStopElement,SVGNames::offsetAttr,Offset,offset)32 DEFINE_ANIMATED_NUMBER(SVGStopElement, SVGNames::offsetAttr, Offset, offset)
33
34 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGStopElement)
35 REGISTER_LOCAL_ANIMATED_PROPERTY(offset)
36 REGISTER_PARENT_ANIMATED_PROPERTIES(SVGElement)
37 END_REGISTER_ANIMATED_PROPERTIES
38
39 inline SVGStopElement::SVGStopElement(Document& document)
40 : SVGElement(SVGNames::stopTag, document)
41 , m_offset(0)
42 {
43 ScriptWrappable::init(this);
44 registerAnimatedPropertiesForSVGStopElement();
45 }
46
create(Document & document)47 PassRefPtr<SVGStopElement> SVGStopElement::create(Document& document)
48 {
49 return adoptRef(new SVGStopElement(document));
50 }
51
isSupportedAttribute(const QualifiedName & attrName)52 bool SVGStopElement::isSupportedAttribute(const QualifiedName& attrName)
53 {
54 DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
55 if (supportedAttributes.isEmpty())
56 supportedAttributes.add(SVGNames::offsetAttr);
57 return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
58 }
59
parseAttribute(const QualifiedName & name,const AtomicString & value)60 void SVGStopElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
61 {
62 if (!isSupportedAttribute(name)) {
63 SVGElement::parseAttribute(name, value);
64 return;
65 }
66
67 if (name == SVGNames::offsetAttr) {
68 if (value.endsWith('%'))
69 setOffsetBaseValue(value.string().left(value.length() - 1).toFloat() / 100.0f);
70 else
71 setOffsetBaseValue(value.toFloat());
72 return;
73 }
74
75 ASSERT_NOT_REACHED();
76 }
77
svgAttributeChanged(const QualifiedName & attrName)78 void SVGStopElement::svgAttributeChanged(const QualifiedName& attrName)
79 {
80 if (!isSupportedAttribute(attrName)) {
81 SVGElement::svgAttributeChanged(attrName);
82 return;
83 }
84
85 SVGElementInstance::InvalidationGuard invalidationGuard(this);
86
87 if (!renderer())
88 return;
89
90 if (attrName == SVGNames::offsetAttr) {
91 RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer());
92 return;
93 }
94
95 ASSERT_NOT_REACHED();
96 }
97
createRenderer(RenderStyle *)98 RenderObject* SVGStopElement::createRenderer(RenderStyle*)
99 {
100 return new RenderSVGGradientStop(this);
101 }
102
rendererIsNeeded(const RenderStyle &)103 bool SVGStopElement::rendererIsNeeded(const RenderStyle&)
104 {
105 return true;
106 }
107
stopColorIncludingOpacity() const108 Color SVGStopElement::stopColorIncludingOpacity() const
109 {
110 RenderStyle* style = renderer() ? renderer()->style() : 0;
111 // FIXME: This check for null style exists to address Bug WK 90814, a rare crash condition in
112 // which the renderer or style is null. This entire class is scheduled for removal (Bug WK 86941)
113 // and we will tolerate this null check until then.
114 if (!style || !style->svgStyle())
115 return Color(Color::transparent, true); // Transparent black.
116
117 const SVGRenderStyle* svgStyle = style->svgStyle();
118 return colorWithOverrideAlpha(svgStyle->stopColor().rgb(), svgStyle->stopOpacity());
119 }
120
121 }
122