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1 /*
2  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
3  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
4  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public License
17  * along with this library; see the file COPYING.LIB.  If not, write to
18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19  * Boston, MA 02110-1301, USA.
20  */
21 
22 #include "config.h"
23 
24 #if ENABLE(SVG)
25 #include "SVGGradientElement.h"
26 
27 #include "Attribute.h"
28 #include "CSSStyleSelector.h"
29 #include "RenderSVGHiddenContainer.h"
30 #include "RenderSVGPath.h"
31 #include "RenderSVGResourceLinearGradient.h"
32 #include "RenderSVGResourceRadialGradient.h"
33 #include "SVGNames.h"
34 #include "SVGStopElement.h"
35 #include "SVGTransformList.h"
36 #include "SVGTransformable.h"
37 #include "SVGUnitTypes.h"
38 
39 namespace WebCore {
40 
41 // Animated property definitions
DEFINE_ANIMATED_ENUMERATION(SVGGradientElement,SVGNames::spreadMethodAttr,SpreadMethod,spreadMethod)42 DEFINE_ANIMATED_ENUMERATION(SVGGradientElement, SVGNames::spreadMethodAttr, SpreadMethod, spreadMethod)
43 DEFINE_ANIMATED_ENUMERATION(SVGGradientElement, SVGNames::gradientUnitsAttr, GradientUnits, gradientUnits)
44 DEFINE_ANIMATED_TRANSFORM_LIST(SVGGradientElement, SVGNames::gradientTransformAttr, GradientTransform, gradientTransform)
45 DEFINE_ANIMATED_STRING(SVGGradientElement, XLinkNames::hrefAttr, Href, href)
46 DEFINE_ANIMATED_BOOLEAN(SVGGradientElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
47 
48 SVGGradientElement::SVGGradientElement(const QualifiedName& tagName, Document* document)
49     : SVGStyledElement(tagName, document)
50     , m_gradientUnits(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
51 {
52 }
53 
parseMappedAttribute(Attribute * attr)54 void SVGGradientElement::parseMappedAttribute(Attribute* attr)
55 {
56     if (attr->name() == SVGNames::gradientUnitsAttr) {
57         if (attr->value() == "userSpaceOnUse")
58             setGradientUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
59         else if (attr->value() == "objectBoundingBox")
60             setGradientUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
61     } else if (attr->name() == SVGNames::gradientTransformAttr) {
62         SVGTransformList newList;
63         if (!SVGTransformable::parseTransformAttribute(newList, attr->value()))
64             newList.clear();
65 
66         detachAnimatedGradientTransformListWrappers(newList.size());
67         setGradientTransformBaseValue(newList);
68     } else if (attr->name() == SVGNames::spreadMethodAttr) {
69         if (attr->value() == "reflect")
70             setSpreadMethodBaseValue(SpreadMethodReflect);
71         else if (attr->value() == "repeat")
72             setSpreadMethodBaseValue(SpreadMethodRepeat);
73         else if (attr->value() == "pad")
74             setSpreadMethodBaseValue(SpreadMethodPad);
75     } else {
76         if (SVGURIReference::parseMappedAttribute(attr))
77             return;
78         if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
79             return;
80 
81         SVGStyledElement::parseMappedAttribute(attr);
82     }
83 }
84 
svgAttributeChanged(const QualifiedName & attrName)85 void SVGGradientElement::svgAttributeChanged(const QualifiedName& attrName)
86 {
87     SVGStyledElement::svgAttributeChanged(attrName);
88 
89     RenderObject* object = renderer();
90     if (!object)
91         return;
92 
93     if (attrName == SVGNames::gradientUnitsAttr
94         || attrName == SVGNames::gradientTransformAttr
95         || attrName == SVGNames::spreadMethodAttr
96         || SVGURIReference::isKnownAttribute(attrName)
97         || SVGExternalResourcesRequired::isKnownAttribute(attrName)
98         || SVGStyledElement::isKnownAttribute(attrName))
99         object->setNeedsLayout(true);
100 }
101 
synchronizeProperty(const QualifiedName & attrName)102 void SVGGradientElement::synchronizeProperty(const QualifiedName& attrName)
103 {
104     SVGStyledElement::synchronizeProperty(attrName);
105 
106     if (attrName == anyQName()) {
107         synchronizeGradientUnits();
108         synchronizeGradientTransform();
109         synchronizeSpreadMethod();
110         synchronizeExternalResourcesRequired();
111         synchronizeHref();
112         return;
113     }
114 
115     if (attrName == SVGNames::gradientUnitsAttr)
116         synchronizeGradientUnits();
117     else if (attrName == SVGNames::gradientTransformAttr)
118         synchronizeGradientTransform();
119     else if (attrName == SVGNames::spreadMethodAttr)
120         synchronizeSpreadMethod();
121     else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))
122         synchronizeExternalResourcesRequired();
123     else if (SVGURIReference::isKnownAttribute(attrName))
124         synchronizeHref();
125 }
126 
fillPassedAttributeToPropertyTypeMap(AttributeToPropertyTypeMap & attributeToPropertyTypeMap)127 void SVGGradientElement::fillPassedAttributeToPropertyTypeMap(AttributeToPropertyTypeMap& attributeToPropertyTypeMap)
128 {
129     SVGStyledElement::fillPassedAttributeToPropertyTypeMap(attributeToPropertyTypeMap);
130 
131     attributeToPropertyTypeMap.set(SVGNames::spreadMethodAttr, AnimatedEnumeration);
132     attributeToPropertyTypeMap.set(SVGNames::gradientUnitsAttr, AnimatedEnumeration);
133     attributeToPropertyTypeMap.set(SVGNames::gradientTransformAttr, AnimatedTransformList);
134     attributeToPropertyTypeMap.set(XLinkNames::hrefAttr, AnimatedString);
135 }
136 
childrenChanged(bool changedByParser,Node * beforeChange,Node * afterChange,int childCountDelta)137 void SVGGradientElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
138 {
139     SVGStyledElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
140 
141     if (changedByParser)
142         return;
143 
144     if (RenderObject* object = renderer())
145         object->setNeedsLayout(true);
146 }
147 
buildStops()148 Vector<Gradient::ColorStop> SVGGradientElement::buildStops()
149 {
150     Vector<Gradient::ColorStop> stops;
151 
152     float previousOffset = 0.0f;
153     for (Node* n = firstChild(); n; n = n->nextSibling()) {
154         SVGElement* element = n->isSVGElement() ? static_cast<SVGElement*>(n) : 0;
155         if (!element || !element->isGradientStop())
156             continue;
157 
158         SVGStopElement* stop = static_cast<SVGStopElement*>(element);
159         Color color = stop->stopColorIncludingOpacity();
160 
161         // Figure out right monotonic offset
162         float offset = stop->offset();
163         offset = std::min(std::max(previousOffset, offset), 1.0f);
164         previousOffset = offset;
165 
166         // Extract individual channel values
167         // FIXME: Why doesn't ColorStop take a Color and an offset??
168         float r, g, b, a;
169         color.getRGBA(r, g, b, a);
170 
171         stops.append(Gradient::ColorStop(offset, r, g, b, a));
172     }
173 
174     return stops;
175 }
176 
177 }
178 
179 #endif // ENABLE(SVG)
180