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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 #if ENABLE(SVG)
25 #include "SVGPatternElement.h"
26 
27 #include "AffineTransform.h"
28 #include "Attribute.h"
29 #include "Document.h"
30 #include "FloatConversion.h"
31 #include "GraphicsContext.h"
32 #include "ImageBuffer.h"
33 #include "PatternAttributes.h"
34 #include "RenderSVGContainer.h"
35 #include "RenderSVGResourcePattern.h"
36 #include "SVGNames.h"
37 #include "SVGRenderSupport.h"
38 #include "SVGSVGElement.h"
39 #include "SVGStyledTransformableElement.h"
40 #include "SVGTransformable.h"
41 #include "SVGUnitTypes.h"
42 
43 namespace WebCore {
44 
45 // Animated property definitions
DEFINE_ANIMATED_LENGTH(SVGPatternElement,SVGNames::xAttr,X,x)46 DEFINE_ANIMATED_LENGTH(SVGPatternElement, SVGNames::xAttr, X, x)
47 DEFINE_ANIMATED_LENGTH(SVGPatternElement, SVGNames::yAttr, Y, y)
48 DEFINE_ANIMATED_LENGTH(SVGPatternElement, SVGNames::widthAttr, Width, width)
49 DEFINE_ANIMATED_LENGTH(SVGPatternElement, SVGNames::heightAttr, Height, height)
50 DEFINE_ANIMATED_ENUMERATION(SVGPatternElement, SVGNames::patternUnitsAttr, PatternUnits, patternUnits)
51 DEFINE_ANIMATED_ENUMERATION(SVGPatternElement, SVGNames::patternContentUnitsAttr, PatternContentUnits, patternContentUnits)
52 DEFINE_ANIMATED_TRANSFORM_LIST(SVGPatternElement, SVGNames::patternTransformAttr, PatternTransform, patternTransform)
53 DEFINE_ANIMATED_STRING(SVGPatternElement, XLinkNames::hrefAttr, Href, href)
54 DEFINE_ANIMATED_BOOLEAN(SVGPatternElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
55 DEFINE_ANIMATED_RECT(SVGPatternElement, SVGNames::viewBoxAttr, ViewBox, viewBox)
56 DEFINE_ANIMATED_PRESERVEASPECTRATIO(SVGPatternElement, SVGNames::preserveAspectRatioAttr, PreserveAspectRatio, preserveAspectRatio)
57 
58 inline SVGPatternElement::SVGPatternElement(const QualifiedName& tagName, Document* document)
59     : SVGStyledElement(tagName, document)
60     , m_x(LengthModeWidth)
61     , m_y(LengthModeHeight)
62     , m_width(LengthModeWidth)
63     , m_height(LengthModeHeight)
64     , m_patternUnits(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
65     , m_patternContentUnits(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)
66 {
67 }
68 
create(const QualifiedName & tagName,Document * document)69 PassRefPtr<SVGPatternElement> SVGPatternElement::create(const QualifiedName& tagName, Document* document)
70 {
71     return adoptRef(new SVGPatternElement(tagName, document));
72 }
73 
parseMappedAttribute(Attribute * attr)74 void SVGPatternElement::parseMappedAttribute(Attribute* attr)
75 {
76     if (attr->name() == SVGNames::patternUnitsAttr) {
77         if (attr->value() == "userSpaceOnUse")
78             setPatternUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
79         else if (attr->value() == "objectBoundingBox")
80             setPatternUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
81     } else if (attr->name() == SVGNames::patternContentUnitsAttr) {
82         if (attr->value() == "userSpaceOnUse")
83             setPatternContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
84         else if (attr->value() == "objectBoundingBox")
85             setPatternContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
86     } else if (attr->name() == SVGNames::patternTransformAttr) {
87         SVGTransformList newList;
88         if (!SVGTransformable::parseTransformAttribute(newList, attr->value()))
89             newList.clear();
90 
91         detachAnimatedPatternTransformListWrappers(newList.size());
92         setPatternTransformBaseValue(newList);
93     } else if (attr->name() == SVGNames::xAttr)
94         setXBaseValue(SVGLength(LengthModeWidth, attr->value()));
95     else if (attr->name() == SVGNames::yAttr)
96         setYBaseValue(SVGLength(LengthModeHeight, attr->value()));
97     else if (attr->name() == SVGNames::widthAttr) {
98         setWidthBaseValue(SVGLength(LengthModeWidth, attr->value()));
99         if (widthBaseValue().value(this) < 0.0)
100             document()->accessSVGExtensions()->reportError("A negative value for pattern attribute <width> is not allowed");
101     } else if (attr->name() == SVGNames::heightAttr) {
102         setHeightBaseValue(SVGLength(LengthModeHeight, attr->value()));
103         if (heightBaseValue().value(this) < 0.0)
104             document()->accessSVGExtensions()->reportError("A negative value for pattern attribute <height> is not allowed");
105     } else {
106         if (SVGURIReference::parseMappedAttribute(attr))
107             return;
108         if (SVGTests::parseMappedAttribute(attr))
109             return;
110         if (SVGLangSpace::parseMappedAttribute(attr))
111             return;
112         if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
113             return;
114         if (SVGFitToViewBox::parseMappedAttribute(document(), attr))
115             return;
116 
117         SVGStyledElement::parseMappedAttribute(attr);
118     }
119 }
120 
svgAttributeChanged(const QualifiedName & attrName)121 void SVGPatternElement::svgAttributeChanged(const QualifiedName& attrName)
122 {
123     SVGStyledElement::svgAttributeChanged(attrName);
124 
125     bool invalidateClients = false;
126     if (attrName == SVGNames::xAttr
127         || attrName == SVGNames::yAttr
128         || attrName == SVGNames::widthAttr
129         || attrName == SVGNames::heightAttr) {
130         invalidateClients = true;
131         updateRelativeLengthsInformation();
132     }
133 
134     RenderObject* object = renderer();
135     if (!object)
136         return;
137 
138     if (invalidateClients
139         || attrName == SVGNames::patternUnitsAttr
140         || attrName == SVGNames::patternContentUnitsAttr
141         || attrName == SVGNames::patternTransformAttr
142         || SVGURIReference::isKnownAttribute(attrName)
143         || SVGTests::isKnownAttribute(attrName)
144         || SVGLangSpace::isKnownAttribute(attrName)
145         || SVGExternalResourcesRequired::isKnownAttribute(attrName)
146         || SVGFitToViewBox::isKnownAttribute(attrName)
147         || SVGStyledElement::isKnownAttribute(attrName))
148         object->setNeedsLayout(true);
149 }
150 
synchronizeProperty(const QualifiedName & attrName)151 void SVGPatternElement::synchronizeProperty(const QualifiedName& attrName)
152 {
153     SVGStyledElement::synchronizeProperty(attrName);
154 
155     if (attrName == anyQName()) {
156         synchronizePatternUnits();
157         synchronizePatternContentUnits();
158         synchronizePatternTransform();
159         synchronizeX();
160         synchronizeY();
161         synchronizeWidth();
162         synchronizeHeight();
163         synchronizeExternalResourcesRequired();
164         synchronizeViewBox();
165         synchronizePreserveAspectRatio();
166         synchronizeHref();
167         SVGTests::synchronizeProperties(this, attrName);
168         return;
169     }
170 
171     if (attrName == SVGNames::patternUnitsAttr)
172         synchronizePatternUnits();
173     else if (attrName == SVGNames::patternContentUnitsAttr)
174         synchronizePatternContentUnits();
175     else if (attrName == SVGNames::patternTransformAttr)
176         synchronizePatternTransform();
177     else if (attrName == SVGNames::xAttr)
178         synchronizeX();
179     else if (attrName == SVGNames::yAttr)
180         synchronizeY();
181     else if (attrName == SVGNames::widthAttr)
182         synchronizeWidth();
183     else if (attrName == SVGNames::heightAttr)
184         synchronizeHeight();
185     else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))
186         synchronizeExternalResourcesRequired();
187     else if (attrName == SVGNames::viewBoxAttr)
188         synchronizeViewBox();
189     else if (attrName == SVGNames::preserveAspectRatioAttr)
190         synchronizePreserveAspectRatio();
191     else if (SVGURIReference::isKnownAttribute(attrName))
192         synchronizeHref();
193     else if (SVGTests::isKnownAttribute(attrName))
194         SVGTests::synchronizeProperties(this, attrName);
195 }
196 
attributeToPropertyTypeMap()197 AttributeToPropertyTypeMap& SVGPatternElement::attributeToPropertyTypeMap()
198 {
199     DEFINE_STATIC_LOCAL(AttributeToPropertyTypeMap, s_attributeToPropertyTypeMap, ());
200     return s_attributeToPropertyTypeMap;
201 }
202 
fillAttributeToPropertyTypeMap()203 void SVGPatternElement::fillAttributeToPropertyTypeMap()
204 {
205     AttributeToPropertyTypeMap& attributeToPropertyTypeMap = this->attributeToPropertyTypeMap();
206 
207     SVGStyledElement::fillPassedAttributeToPropertyTypeMap(attributeToPropertyTypeMap);
208     attributeToPropertyTypeMap.set(SVGNames::xAttr, AnimatedLength);
209     attributeToPropertyTypeMap.set(SVGNames::yAttr, AnimatedLength);
210     attributeToPropertyTypeMap.set(SVGNames::widthAttr, AnimatedLength);
211     attributeToPropertyTypeMap.set(SVGNames::heightAttr, AnimatedLength);
212     attributeToPropertyTypeMap.set(SVGNames::patternUnitsAttr, AnimatedEnumeration);
213     attributeToPropertyTypeMap.set(SVGNames::patternContentUnitsAttr, AnimatedEnumeration);
214     attributeToPropertyTypeMap.set(SVGNames::patternTransformAttr, AnimatedTransformList);
215     attributeToPropertyTypeMap.set(XLinkNames::hrefAttr, AnimatedString);
216     attributeToPropertyTypeMap.set(SVGNames::viewBoxAttr, AnimatedRect);
217     attributeToPropertyTypeMap.set(SVGNames::preserveAspectRatioAttr, AnimatedPreserveAspectRatio);
218 }
219 
childrenChanged(bool changedByParser,Node * beforeChange,Node * afterChange,int childCountDelta)220 void SVGPatternElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
221 {
222     SVGStyledElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
223 
224     if (changedByParser)
225         return;
226 
227     if (RenderObject* object = renderer())
228         object->setNeedsLayout(true);
229 }
230 
createRenderer(RenderArena * arena,RenderStyle *)231 RenderObject* SVGPatternElement::createRenderer(RenderArena* arena, RenderStyle*)
232 {
233     return new (arena) RenderSVGResourcePattern(this);
234 }
235 
collectPatternAttributes(PatternAttributes & attributes) const236 void SVGPatternElement::collectPatternAttributes(PatternAttributes& attributes) const
237 {
238     HashSet<const SVGPatternElement*> processedPatterns;
239 
240     const SVGPatternElement* current = this;
241     while (current) {
242         if (!attributes.hasX() && current->hasAttribute(SVGNames::xAttr))
243             attributes.setX(current->x());
244 
245         if (!attributes.hasY() && current->hasAttribute(SVGNames::yAttr))
246             attributes.setY(current->y());
247 
248         if (!attributes.hasWidth() && current->hasAttribute(SVGNames::widthAttr))
249             attributes.setWidth(current->width());
250 
251         if (!attributes.hasHeight() && current->hasAttribute(SVGNames::heightAttr))
252             attributes.setHeight(current->height());
253 
254         if (!attributes.hasViewBox() && current->hasAttribute(SVGNames::viewBoxAttr))
255             attributes.setViewBox(current->viewBox());
256 
257         if (!attributes.hasPreserveAspectRatio() && current->hasAttribute(SVGNames::preserveAspectRatioAttr))
258             attributes.setPreserveAspectRatio(current->preserveAspectRatio());
259 
260         if (!attributes.hasBoundingBoxMode() && current->hasAttribute(SVGNames::patternUnitsAttr))
261             attributes.setBoundingBoxMode(current->patternUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
262 
263         if (!attributes.hasBoundingBoxModeContent() && current->hasAttribute(SVGNames::patternContentUnitsAttr))
264             attributes.setBoundingBoxModeContent(current->patternContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
265 
266         if (!attributes.hasPatternTransform() && current->hasAttribute(SVGNames::patternTransformAttr)) {
267             AffineTransform transform;
268             current->patternTransform().concatenate(transform);
269             attributes.setPatternTransform(transform);
270         }
271 
272         if (!attributes.hasPatternContentElement() && current->hasChildNodes())
273             attributes.setPatternContentElement(current);
274 
275         processedPatterns.add(current);
276 
277         // Respect xlink:href, take attributes from referenced element
278         Node* refNode = ownerDocument()->getElementById(SVGURIReference::getTarget(current->href()));
279         if (refNode && refNode->hasTagName(SVGNames::patternTag)) {
280             current = static_cast<const SVGPatternElement*>(const_cast<const Node*>(refNode));
281 
282             // Cycle detection
283             if (processedPatterns.contains(current)) {
284                 current = 0;
285                 break;
286             }
287         } else
288             current = 0;
289     }
290 }
291 
selfHasRelativeLengths() const292 bool SVGPatternElement::selfHasRelativeLengths() const
293 {
294     return x().isRelative()
295         || y().isRelative()
296         || width().isRelative()
297         || height().isRelative();
298 }
299 
300 }
301 
302 #endif // ENABLE(SVG)
303