1 /*
2 * Copyright (C) 2004, 2005, 2006, 2007, 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 #include "core/svg/SVGPatternElement.h"
25
26 #include "core/XLinkNames.h"
27 #include "core/dom/ElementTraversal.h"
28 #include "core/rendering/svg/RenderSVGResourcePattern.h"
29 #include "core/svg/PatternAttributes.h"
30 #include "platform/transforms/AffineTransform.h"
31
32 namespace WebCore {
33
SVGPatternElement(Document & document)34 inline SVGPatternElement::SVGPatternElement(Document& document)
35 : SVGElement(SVGNames::patternTag, document)
36 , SVGURIReference(this)
37 , SVGTests(this)
38 , SVGFitToViewBox(this)
39 , m_x(SVGAnimatedLength::create(this, SVGNames::xAttr, SVGLength::create(LengthModeWidth), AllowNegativeLengths))
40 , m_y(SVGAnimatedLength::create(this, SVGNames::yAttr, SVGLength::create(LengthModeHeight), AllowNegativeLengths))
41 , m_width(SVGAnimatedLength::create(this, SVGNames::widthAttr, SVGLength::create(LengthModeWidth), ForbidNegativeLengths))
42 , m_height(SVGAnimatedLength::create(this, SVGNames::heightAttr, SVGLength::create(LengthModeHeight), ForbidNegativeLengths))
43 , m_patternTransform(SVGAnimatedTransformList::create(this, SVGNames::patternTransformAttr, SVGTransformList::create()))
44 , m_patternUnits(SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>::create(this, SVGNames::patternUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX))
45 , m_patternContentUnits(SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>::create(this, SVGNames::patternContentUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE))
46 {
47 ScriptWrappable::init(this);
48
49 addToPropertyMap(m_x);
50 addToPropertyMap(m_y);
51 addToPropertyMap(m_width);
52 addToPropertyMap(m_height);
53 addToPropertyMap(m_patternTransform);
54 addToPropertyMap(m_patternUnits);
55 addToPropertyMap(m_patternContentUnits);
56 }
57
DEFINE_NODE_FACTORY(SVGPatternElement)58 DEFINE_NODE_FACTORY(SVGPatternElement)
59
60 bool SVGPatternElement::isSupportedAttribute(const QualifiedName& attrName)
61 {
62 DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
63 if (supportedAttributes.isEmpty()) {
64 SVGURIReference::addSupportedAttributes(supportedAttributes);
65 SVGTests::addSupportedAttributes(supportedAttributes);
66 SVGFitToViewBox::addSupportedAttributes(supportedAttributes);
67 supportedAttributes.add(SVGNames::patternUnitsAttr);
68 supportedAttributes.add(SVGNames::patternContentUnitsAttr);
69 supportedAttributes.add(SVGNames::patternTransformAttr);
70 supportedAttributes.add(SVGNames::xAttr);
71 supportedAttributes.add(SVGNames::yAttr);
72 supportedAttributes.add(SVGNames::widthAttr);
73 supportedAttributes.add(SVGNames::heightAttr);
74 }
75 return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
76 }
77
parseAttribute(const QualifiedName & name,const AtomicString & value)78 void SVGPatternElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
79 {
80 SVGParsingError parseError = NoError;
81
82 if (!isSupportedAttribute(name)) {
83 SVGElement::parseAttribute(name, value);
84 } else if (name == SVGNames::patternUnitsAttr) {
85 m_patternUnits->setBaseValueAsString(value, parseError);
86 } else if (name == SVGNames::patternContentUnitsAttr) {
87 m_patternContentUnits->setBaseValueAsString(value, parseError);
88 } else if (name == SVGNames::patternTransformAttr) {
89 m_patternTransform->setBaseValueAsString(value, parseError);
90 } else if (name == SVGNames::xAttr) {
91 m_x->setBaseValueAsString(value, parseError);
92 } else if (name == SVGNames::yAttr) {
93 m_y->setBaseValueAsString(value, parseError);
94 } else if (name == SVGNames::widthAttr) {
95 m_width->setBaseValueAsString(value, parseError);
96 } else if (name == SVGNames::heightAttr) {
97 m_height->setBaseValueAsString(value, parseError);
98 } else if (SVGURIReference::parseAttribute(name, value, parseError)) {
99 } else if (SVGTests::parseAttribute(name, value)) {
100 } else if (SVGFitToViewBox::parseAttribute(name, value, document(), parseError)) {
101 } else {
102 ASSERT_NOT_REACHED();
103 }
104
105 reportAttributeParsingError(parseError, name, value);
106 }
107
svgAttributeChanged(const QualifiedName & attrName)108 void SVGPatternElement::svgAttributeChanged(const QualifiedName& attrName)
109 {
110 if (!isSupportedAttribute(attrName)) {
111 SVGElement::svgAttributeChanged(attrName);
112 return;
113 }
114
115 SVGElement::InvalidationGuard invalidationGuard(this);
116
117 if (attrName == SVGNames::xAttr
118 || attrName == SVGNames::yAttr
119 || attrName == SVGNames::widthAttr
120 || attrName == SVGNames::heightAttr)
121 updateRelativeLengthsInformation();
122
123 RenderSVGResourceContainer* renderer = toRenderSVGResourceContainer(this->renderer());
124 if (renderer)
125 renderer->invalidateCacheAndMarkForLayout();
126 }
127
childrenChanged(bool changedByParser,Node * beforeChange,Node * afterChange,int childCountDelta)128 void SVGPatternElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
129 {
130 SVGElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
131
132 if (changedByParser)
133 return;
134
135 if (RenderObject* object = renderer())
136 object->setNeedsLayoutAndFullPaintInvalidation();
137 }
138
createRenderer(RenderStyle *)139 RenderObject* SVGPatternElement::createRenderer(RenderStyle*)
140 {
141 return new RenderSVGResourcePattern(this);
142 }
143
setPatternAttributes(const SVGPatternElement * element,PatternAttributes & attributes)144 static void setPatternAttributes(const SVGPatternElement* element, PatternAttributes& attributes)
145 {
146 if (!attributes.hasX() && element->x()->isSpecified())
147 attributes.setX(element->x()->currentValue());
148
149 if (!attributes.hasY() && element->y()->isSpecified())
150 attributes.setY(element->y()->currentValue());
151
152 if (!attributes.hasWidth() && element->width()->isSpecified())
153 attributes.setWidth(element->width()->currentValue());
154
155 if (!attributes.hasHeight() && element->height()->isSpecified())
156 attributes.setHeight(element->height()->currentValue());
157
158 if (!attributes.hasViewBox() && element->viewBox()->isSpecified() && element->viewBox()->currentValue()->isValid())
159 attributes.setViewBox(element->viewBox()->currentValue()->value());
160
161 if (!attributes.hasPreserveAspectRatio() && element->preserveAspectRatio()->isSpecified())
162 attributes.setPreserveAspectRatio(element->preserveAspectRatio()->currentValue());
163
164 if (!attributes.hasPatternUnits() && element->patternUnits()->isSpecified())
165 attributes.setPatternUnits(element->patternUnits()->currentValue()->enumValue());
166
167 if (!attributes.hasPatternContentUnits() && element->patternContentUnits()->isSpecified())
168 attributes.setPatternContentUnits(element->patternContentUnits()->currentValue()->enumValue());
169
170 if (!attributes.hasPatternTransform() && element->patternTransform()->isSpecified()) {
171 AffineTransform transform;
172 element->patternTransform()->currentValue()->concatenate(transform);
173 attributes.setPatternTransform(transform);
174 }
175
176 if (!attributes.hasPatternContentElement() && ElementTraversal::firstWithin(*element))
177 attributes.setPatternContentElement(element);
178 }
179
collectPatternAttributes(PatternAttributes & attributes) const180 void SVGPatternElement::collectPatternAttributes(PatternAttributes& attributes) const
181 {
182 HashSet<const SVGPatternElement*> processedPatterns;
183 const SVGPatternElement* current = this;
184
185 while (true) {
186 setPatternAttributes(current, attributes);
187 processedPatterns.add(current);
188
189 // Respect xlink:href, take attributes from referenced element
190 Node* refNode = SVGURIReference::targetElementFromIRIString(current->hrefString(), treeScope());
191 if (isSVGPatternElement(refNode)) {
192 current = toSVGPatternElement(refNode);
193
194 // Cycle detection
195 if (processedPatterns.contains(current))
196 return;
197 } else {
198 return;
199 }
200 }
201
202 ASSERT_NOT_REACHED();
203 }
204
localCoordinateSpaceTransform(SVGElement::CTMScope) const205 AffineTransform SVGPatternElement::localCoordinateSpaceTransform(SVGElement::CTMScope) const
206 {
207 AffineTransform matrix;
208 m_patternTransform->currentValue()->concatenate(matrix);
209 return matrix;
210 }
211
selfHasRelativeLengths() const212 bool SVGPatternElement::selfHasRelativeLengths() const
213 {
214 return m_x->currentValue()->isRelative()
215 || m_y->currentValue()->isRelative()
216 || m_width->currentValue()->isRelative()
217 || m_height->currentValue()->isRelative();
218 }
219
220 }
221