1 /*
2 Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
3 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
4
5 This file is part of the KDE project
6
7 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public
9 License as published by the Free Software Foundation; either
10 version 2 of the License, or (at your option) any later version.
11
12 This library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
16
17 You should have received a copy of the GNU Library General Public License
18 along with this library; see the file COPYING.LIB. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA.
21 */
22
23 #include "config.h"
24
25 #if ENABLE(SVG)
26 #include "SVGGradientElement.h"
27
28 #include "CSSStyleSelector.h"
29 #include "MappedAttribute.h"
30 #include "RenderPath.h"
31 #include "RenderSVGHiddenContainer.h"
32 #include "SVGNames.h"
33 #include "SVGPaintServerLinearGradient.h"
34 #include "SVGPaintServerRadialGradient.h"
35 #include "SVGStopElement.h"
36 #include "SVGTransformList.h"
37 #include "SVGTransformable.h"
38 #include "SVGUnitTypes.h"
39
40 namespace WebCore {
41
42 char SVGGradientElementIdentifier[] = "SVGGradientElement";
43
SVGGradientElement(const QualifiedName & tagName,Document * doc)44 SVGGradientElement::SVGGradientElement(const QualifiedName& tagName, Document* doc)
45 : SVGStyledElement(tagName, doc)
46 , SVGURIReference()
47 , SVGExternalResourcesRequired()
48 , m_spreadMethod(this, SVGNames::spreadMethodAttr)
49 , m_gradientUnits(this, SVGNames::gradientUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
50 , m_gradientTransform(this, SVGNames::gradientTransformAttr, SVGTransformList::create(SVGNames::gradientTransformAttr))
51 {
52 }
53
~SVGGradientElement()54 SVGGradientElement::~SVGGradientElement()
55 {
56 }
57
parseMappedAttribute(MappedAttribute * attr)58 void SVGGradientElement::parseMappedAttribute(MappedAttribute* attr)
59 {
60 if (attr->name() == SVGNames::gradientUnitsAttr) {
61 if (attr->value() == "userSpaceOnUse")
62 setGradientUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
63 else if (attr->value() == "objectBoundingBox")
64 setGradientUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
65 } else if (attr->name() == SVGNames::gradientTransformAttr) {
66 SVGTransformList* gradientTransforms = gradientTransformBaseValue();
67 if (!SVGTransformable::parseTransformAttribute(gradientTransforms, attr->value())) {
68 ExceptionCode ec = 0;
69 gradientTransforms->clear(ec);
70 }
71 } else if (attr->name() == SVGNames::spreadMethodAttr) {
72 if (attr->value() == "reflect")
73 setSpreadMethodBaseValue(SpreadMethodReflect);
74 else if (attr->value() == "repeat")
75 setSpreadMethodBaseValue(SpreadMethodRepeat);
76 else if (attr->value() == "pad")
77 setSpreadMethodBaseValue(SpreadMethodPad);
78 } else {
79 if (SVGURIReference::parseMappedAttribute(attr))
80 return;
81 if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
82 return;
83
84 SVGStyledElement::parseMappedAttribute(attr);
85 }
86 }
87
svgAttributeChanged(const QualifiedName & attrName)88 void SVGGradientElement::svgAttributeChanged(const QualifiedName& attrName)
89 {
90 SVGStyledElement::svgAttributeChanged(attrName);
91
92 if (!m_resource)
93 return;
94
95 if (attrName == SVGNames::gradientUnitsAttr ||
96 attrName == SVGNames::gradientTransformAttr ||
97 attrName == SVGNames::spreadMethodAttr ||
98 SVGURIReference::isKnownAttribute(attrName) ||
99 SVGExternalResourcesRequired::isKnownAttribute(attrName) ||
100 SVGStyledElement::isKnownAttribute(attrName))
101 m_resource->invalidate();
102 }
103
childrenChanged(bool changedByParser,Node * beforeChange,Node * afterChange,int childCountDelta)104 void SVGGradientElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
105 {
106 SVGStyledElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
107
108 if (m_resource)
109 m_resource->invalidate();
110 }
111
createRenderer(RenderArena * arena,RenderStyle *)112 RenderObject* SVGGradientElement::createRenderer(RenderArena* arena, RenderStyle*)
113 {
114 return new (arena) RenderSVGHiddenContainer(this);
115 }
116
canvasResource()117 SVGResource* SVGGradientElement::canvasResource()
118 {
119 if (!m_resource) {
120 if (gradientType() == LinearGradientPaintServer)
121 m_resource = SVGPaintServerLinearGradient::create(this);
122 else
123 m_resource = SVGPaintServerRadialGradient::create(this);
124 }
125
126 return m_resource.get();
127 }
128
buildStops() const129 Vector<SVGGradientStop> SVGGradientElement::buildStops() const
130 {
131 Vector<SVGGradientStop> stops;
132 RefPtr<RenderStyle> gradientStyle;
133
134 for (Node* n = firstChild(); n; n = n->nextSibling()) {
135 SVGElement* element = n->isSVGElement() ? static_cast<SVGElement*>(n) : 0;
136
137 if (element && element->isGradientStop()) {
138 SVGStopElement* stop = static_cast<SVGStopElement*>(element);
139 float stopOffset = stop->offset();
140
141 Color color;
142 float opacity;
143
144 if (stop->renderer()) {
145 RenderStyle* stopStyle = stop->renderer()->style();
146 color = stopStyle->svgStyle()->stopColor();
147 opacity = stopStyle->svgStyle()->stopOpacity();
148 } else {
149 // If there is no renderer for this stop element, then a parent element
150 // set display="none" - ie. <g display="none"><linearGradient><stop>..
151 // Unfortunately we have to manually rebuild the stop style. See pservers-grad-19-b.svg
152 if (!gradientStyle)
153 gradientStyle = const_cast<SVGGradientElement*>(this)->styleForRenderer();
154
155 RefPtr<RenderStyle> stopStyle = stop->resolveStyle(gradientStyle.get());
156
157 color = stopStyle->svgStyle()->stopColor();
158 opacity = stopStyle->svgStyle()->stopOpacity();
159 }
160
161 stops.append(makeGradientStop(stopOffset, makeRGBA(color.red(), color.green(), color.blue(), int(opacity * 255.))));
162 }
163 }
164
165 return stops;
166 }
167
168 }
169
170 #endif // ENABLE(SVG)
171