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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  *
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 #if ENABLE(SVG)
24 #include "SVGPathElement.h"
25 
26 #include "Attribute.h"
27 #include "RenderSVGPath.h"
28 #include "RenderSVGResource.h"
29 #include "SVGNames.h"
30 #include "SVGPathParserFactory.h"
31 #include "SVGPathSegArc.h"
32 #include "SVGPathSegClosePath.h"
33 #include "SVGPathSegCurvetoCubic.h"
34 #include "SVGPathSegCurvetoCubicSmooth.h"
35 #include "SVGPathSegCurvetoQuadratic.h"
36 #include "SVGPathSegCurvetoQuadraticSmooth.h"
37 #include "SVGPathSegLineto.h"
38 #include "SVGPathSegLinetoHorizontal.h"
39 #include "SVGPathSegLinetoVertical.h"
40 #include "SVGPathSegList.h"
41 #include "SVGPathSegListBuilder.h"
42 #include "SVGPathSegListPropertyTearOff.h"
43 #include "SVGPathSegMoveto.h"
44 #include "SVGSVGElement.h"
45 
46 namespace WebCore {
47 
48 // Animated property definitions
DEFINE_ANIMATED_NUMBER(SVGPathElement,SVGNames::pathLengthAttr,PathLength,pathLength)49 DEFINE_ANIMATED_NUMBER(SVGPathElement, SVGNames::pathLengthAttr, PathLength, pathLength)
50 DEFINE_ANIMATED_BOOLEAN(SVGPathElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
51 
52 inline SVGPathElement::SVGPathElement(const QualifiedName& tagName, Document* document)
53     : SVGStyledTransformableElement(tagName, document)
54     , m_pathByteStream(SVGPathByteStream::create())
55     , m_pathSegList(PathSegUnalteredRole)
56 {
57 }
58 
create(const QualifiedName & tagName,Document * document)59 PassRefPtr<SVGPathElement> SVGPathElement::create(const QualifiedName& tagName, Document* document)
60 {
61     return adoptRef(new SVGPathElement(tagName, document));
62 }
63 
getTotalLength()64 float SVGPathElement::getTotalLength()
65 {
66     // FIXME: this may wish to use the pathSegList instead of the pathdata if that's cheaper to build (or cached)
67     Path path;
68     toPathData(path);
69     return path.length();
70 }
71 
getPointAtLength(float length)72 FloatPoint SVGPathElement::getPointAtLength(float length)
73 {
74     // FIXME: this may wish to use the pathSegList instead of the pathdata if that's cheaper to build (or cached)
75     bool ok = false;
76     Path path;
77     toPathData(path);
78     return path.pointAtLength(length, ok);
79 }
80 
getPathSegAtLength(float length)81 unsigned long SVGPathElement::getPathSegAtLength(float length)
82 {
83     SVGPathParserFactory* factory = SVGPathParserFactory::self();
84     unsigned long pathSeg = 0;
85     factory->getSVGPathSegAtLengthFromSVGPathByteStream(m_pathByteStream.get(), length, pathSeg);
86     return pathSeg;
87 }
88 
createSVGPathSegClosePath(SVGPathSegRole role)89 PassRefPtr<SVGPathSegClosePath> SVGPathElement::createSVGPathSegClosePath(SVGPathSegRole role)
90 {
91     return SVGPathSegClosePath::create(this, role);
92 }
93 
createSVGPathSegMovetoAbs(float x,float y,SVGPathSegRole role)94 PassRefPtr<SVGPathSegMovetoAbs> SVGPathElement::createSVGPathSegMovetoAbs(float x, float y, SVGPathSegRole role)
95 {
96     return SVGPathSegMovetoAbs::create(this, role, x, y);
97 }
98 
createSVGPathSegMovetoRel(float x,float y,SVGPathSegRole role)99 PassRefPtr<SVGPathSegMovetoRel> SVGPathElement::createSVGPathSegMovetoRel(float x, float y, SVGPathSegRole role)
100 {
101     return SVGPathSegMovetoRel::create(this, role, x, y);
102 }
103 
createSVGPathSegLinetoAbs(float x,float y,SVGPathSegRole role)104 PassRefPtr<SVGPathSegLinetoAbs> SVGPathElement::createSVGPathSegLinetoAbs(float x, float y, SVGPathSegRole role)
105 {
106     return SVGPathSegLinetoAbs::create(this, role, x, y);
107 }
108 
createSVGPathSegLinetoRel(float x,float y,SVGPathSegRole role)109 PassRefPtr<SVGPathSegLinetoRel> SVGPathElement::createSVGPathSegLinetoRel(float x, float y, SVGPathSegRole role)
110 {
111     return SVGPathSegLinetoRel::create(this, role, x, y);
112 }
113 
createSVGPathSegCurvetoCubicAbs(float x,float y,float x1,float y1,float x2,float y2,SVGPathSegRole role)114 PassRefPtr<SVGPathSegCurvetoCubicAbs> SVGPathElement::createSVGPathSegCurvetoCubicAbs(float x, float y, float x1, float y1, float x2, float y2, SVGPathSegRole role)
115 {
116     return SVGPathSegCurvetoCubicAbs::create(this, role, x, y, x1, y1, x2, y2);
117 }
118 
createSVGPathSegCurvetoCubicRel(float x,float y,float x1,float y1,float x2,float y2,SVGPathSegRole role)119 PassRefPtr<SVGPathSegCurvetoCubicRel> SVGPathElement::createSVGPathSegCurvetoCubicRel(float x, float y, float x1, float y1, float x2, float y2, SVGPathSegRole role)
120 {
121     return SVGPathSegCurvetoCubicRel::create(this, role, x, y, x1, y1, x2, y2);
122 }
123 
createSVGPathSegCurvetoQuadraticAbs(float x,float y,float x1,float y1,SVGPathSegRole role)124 PassRefPtr<SVGPathSegCurvetoQuadraticAbs> SVGPathElement::createSVGPathSegCurvetoQuadraticAbs(float x, float y, float x1, float y1, SVGPathSegRole role)
125 {
126     return SVGPathSegCurvetoQuadraticAbs::create(this, role, x, y, x1, y1);
127 }
128 
createSVGPathSegCurvetoQuadraticRel(float x,float y,float x1,float y1,SVGPathSegRole role)129 PassRefPtr<SVGPathSegCurvetoQuadraticRel> SVGPathElement::createSVGPathSegCurvetoQuadraticRel(float x, float y, float x1, float y1, SVGPathSegRole role)
130 {
131     return SVGPathSegCurvetoQuadraticRel::create(this, role, x, y, x1, y1);
132 }
133 
createSVGPathSegArcAbs(float x,float y,float r1,float r2,float angle,bool largeArcFlag,bool sweepFlag,SVGPathSegRole role)134 PassRefPtr<SVGPathSegArcAbs> SVGPathElement::createSVGPathSegArcAbs(float x, float y, float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag, SVGPathSegRole role)
135 {
136     return SVGPathSegArcAbs::create(this, role, x, y, r1, r2, angle, largeArcFlag, sweepFlag);
137 }
138 
createSVGPathSegArcRel(float x,float y,float r1,float r2,float angle,bool largeArcFlag,bool sweepFlag,SVGPathSegRole role)139 PassRefPtr<SVGPathSegArcRel> SVGPathElement::createSVGPathSegArcRel(float x, float y, float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag, SVGPathSegRole role)
140 {
141     return SVGPathSegArcRel::create(this, role, x, y, r1, r2, angle, largeArcFlag, sweepFlag);
142 }
143 
createSVGPathSegLinetoHorizontalAbs(float x,SVGPathSegRole role)144 PassRefPtr<SVGPathSegLinetoHorizontalAbs> SVGPathElement::createSVGPathSegLinetoHorizontalAbs(float x, SVGPathSegRole role)
145 {
146     return SVGPathSegLinetoHorizontalAbs::create(this, role, x);
147 }
148 
createSVGPathSegLinetoHorizontalRel(float x,SVGPathSegRole role)149 PassRefPtr<SVGPathSegLinetoHorizontalRel> SVGPathElement::createSVGPathSegLinetoHorizontalRel(float x, SVGPathSegRole role)
150 {
151     return SVGPathSegLinetoHorizontalRel::create(this, role, x);
152 }
153 
createSVGPathSegLinetoVerticalAbs(float y,SVGPathSegRole role)154 PassRefPtr<SVGPathSegLinetoVerticalAbs> SVGPathElement::createSVGPathSegLinetoVerticalAbs(float y, SVGPathSegRole role)
155 {
156     return SVGPathSegLinetoVerticalAbs::create(this, role, y);
157 }
158 
createSVGPathSegLinetoVerticalRel(float y,SVGPathSegRole role)159 PassRefPtr<SVGPathSegLinetoVerticalRel> SVGPathElement::createSVGPathSegLinetoVerticalRel(float y, SVGPathSegRole role)
160 {
161     return SVGPathSegLinetoVerticalRel::create(this, role, y);
162 }
163 
createSVGPathSegCurvetoCubicSmoothAbs(float x,float y,float x2,float y2,SVGPathSegRole role)164 PassRefPtr<SVGPathSegCurvetoCubicSmoothAbs> SVGPathElement::createSVGPathSegCurvetoCubicSmoothAbs(float x, float y, float x2, float y2, SVGPathSegRole role)
165 {
166     return SVGPathSegCurvetoCubicSmoothAbs::create(this, role, x, y, x2, y2);
167 }
168 
createSVGPathSegCurvetoCubicSmoothRel(float x,float y,float x2,float y2,SVGPathSegRole role)169 PassRefPtr<SVGPathSegCurvetoCubicSmoothRel> SVGPathElement::createSVGPathSegCurvetoCubicSmoothRel(float x, float y, float x2, float y2, SVGPathSegRole role)
170 {
171     return SVGPathSegCurvetoCubicSmoothRel::create(this, role, x, y, x2, y2);
172 }
173 
createSVGPathSegCurvetoQuadraticSmoothAbs(float x,float y,SVGPathSegRole role)174 PassRefPtr<SVGPathSegCurvetoQuadraticSmoothAbs> SVGPathElement::createSVGPathSegCurvetoQuadraticSmoothAbs(float x, float y, SVGPathSegRole role)
175 {
176     return SVGPathSegCurvetoQuadraticSmoothAbs::create(this, role, x, y);
177 }
178 
createSVGPathSegCurvetoQuadraticSmoothRel(float x,float y,SVGPathSegRole role)179 PassRefPtr<SVGPathSegCurvetoQuadraticSmoothRel> SVGPathElement::createSVGPathSegCurvetoQuadraticSmoothRel(float x, float y, SVGPathSegRole role)
180 {
181     return SVGPathSegCurvetoQuadraticSmoothRel::create(this, role, x, y);
182 }
183 
parseMappedAttribute(Attribute * attr)184 void SVGPathElement::parseMappedAttribute(Attribute* attr)
185 {
186     if (attr->name() == SVGNames::dAttr) {
187         SVGPathParserFactory* factory = SVGPathParserFactory::self();
188         if (!factory->buildSVGPathByteStreamFromString(attr->value(), m_pathByteStream, UnalteredParsing))
189             document()->accessSVGExtensions()->reportError("Problem parsing d=\"" + attr->value() + "\"");
190     } else if (attr->name() == SVGNames::pathLengthAttr) {
191         setPathLengthBaseValue(attr->value().toFloat());
192         if (pathLengthBaseValue() < 0.0f)
193             document()->accessSVGExtensions()->reportError("A negative value for path attribute <pathLength> is not allowed");
194     } else {
195         if (SVGTests::parseMappedAttribute(attr))
196             return;
197         if (SVGLangSpace::parseMappedAttribute(attr))
198             return;
199         if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
200             return;
201         SVGStyledTransformableElement::parseMappedAttribute(attr);
202     }
203 }
204 
svgAttributeChanged(const QualifiedName & attrName)205 void SVGPathElement::svgAttributeChanged(const QualifiedName& attrName)
206 {
207     SVGStyledTransformableElement::svgAttributeChanged(attrName);
208 
209     if (SVGTests::handleAttributeChange(this, attrName))
210         return;
211 
212     RenderSVGPath* renderer = static_cast<RenderSVGPath*>(this->renderer());
213 
214     if (attrName == SVGNames::dAttr) {
215         if (m_animatablePathSegList) {
216             SVGPathSegList newList(PathSegUnalteredRole);
217             SVGPathParserFactory* factory = SVGPathParserFactory::self();
218             factory->buildSVGPathSegListFromByteStream(m_pathByteStream.get(), this, newList, UnalteredParsing);
219             m_pathSegList.value = newList;
220         }
221 
222         if (!renderer)
223             return;
224 
225         renderer->setNeedsPathUpdate();
226         RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
227         return;
228     }
229 
230     if (!renderer)
231         return;
232 
233     if (attrName == SVGNames::pathLengthAttr
234         || SVGLangSpace::isKnownAttribute(attrName)
235         || SVGExternalResourcesRequired::isKnownAttribute(attrName))
236         RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
237 }
238 
synchronizeProperty(const QualifiedName & attrName)239 void SVGPathElement::synchronizeProperty(const QualifiedName& attrName)
240 {
241     SVGStyledTransformableElement::synchronizeProperty(attrName);
242 
243     if (attrName == anyQName()) {
244         synchronizeD();
245         synchronizePathLength();
246         synchronizeExternalResourcesRequired();
247         SVGTests::synchronizeProperties(this, attrName);
248         return;
249     }
250 
251     if (attrName == SVGNames::dAttr)
252         synchronizeD();
253     else if (attrName == SVGNames::pathLengthAttr)
254         synchronizePathLength();
255     else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))
256         synchronizeExternalResourcesRequired();
257     else if (SVGTests::isKnownAttribute(attrName))
258         SVGTests::synchronizeProperties(this, attrName);
259 }
260 
synchronizeD()261 void SVGPathElement::synchronizeD()
262 {
263     if (!m_pathSegList.shouldSynchronize)
264         return;
265 
266     SVGAnimatedPropertySynchronizer<true>::synchronize(this, SVGNames::dAttr, m_pathSegList.value.valueAsString());
267 }
268 
attributeToPropertyTypeMap()269 AttributeToPropertyTypeMap& SVGPathElement::attributeToPropertyTypeMap()
270 {
271     DEFINE_STATIC_LOCAL(AttributeToPropertyTypeMap, s_attributeToPropertyTypeMap, ());
272     return s_attributeToPropertyTypeMap;
273 }
274 
fillAttributeToPropertyTypeMap()275 void SVGPathElement::fillAttributeToPropertyTypeMap()
276 {
277     AttributeToPropertyTypeMap& attributeToPropertyTypeMap = this->attributeToPropertyTypeMap();
278 
279     SVGStyledTransformableElement::fillPassedAttributeToPropertyTypeMap(attributeToPropertyTypeMap);
280     attributeToPropertyTypeMap.set(SVGNames::dAttr, AnimatedPath);
281     attributeToPropertyTypeMap.set(SVGNames::pathLengthAttr, AnimatedNumber);
282 }
283 
pathSegList()284 SVGPathSegListPropertyTearOff* SVGPathElement::pathSegList()
285 {
286     if (!m_animatablePathSegList) {
287         m_pathSegList.shouldSynchronize = true;
288 
289         SVGPathParserFactory* factory = SVGPathParserFactory::self();
290         factory->buildSVGPathSegListFromByteStream(m_pathByteStream.get(), this, m_pathSegList.value, UnalteredParsing);
291 
292         m_animatablePathSegList = SVGAnimatedProperty::lookupOrCreateWrapper<SVGAnimatedPathSegListPropertyTearOff, SVGPathSegList>
293                                  (this, SVGNames::dAttr, SVGNames::dAttr.localName(), m_pathSegList.value);
294     }
295 
296     return static_cast<SVGPathSegListPropertyTearOff*>(m_animatablePathSegList->baseVal(PathSegUnalteredRole));
297 }
298 
normalizedPathSegList()299 SVGPathSegListPropertyTearOff* SVGPathElement::normalizedPathSegList()
300 {
301     // FIXME: https://bugs.webkit.org/show_bug.cgi?id=15412 - Implement normalized path segment lists!
302     return 0;
303 }
304 
animatedPathSegList()305 SVGPathSegListPropertyTearOff* SVGPathElement::animatedPathSegList()
306 {
307     if (!m_animatablePathSegList) {
308         m_pathSegList.shouldSynchronize = true;
309 
310         SVGPathParserFactory* factory = SVGPathParserFactory::self();
311         factory->buildSVGPathSegListFromByteStream(m_pathByteStream.get(), this, m_pathSegList.value, UnalteredParsing);
312 
313         m_animatablePathSegList = SVGAnimatedProperty::lookupOrCreateWrapper<SVGAnimatedPathSegListPropertyTearOff, SVGPathSegList>
314                                  (this, SVGNames::dAttr, SVGNames::dAttr.localName(), m_pathSegList.value);
315     }
316 
317     return static_cast<SVGPathSegListPropertyTearOff*>(m_animatablePathSegList->animVal(PathSegUnalteredRole));
318 }
319 
animatedNormalizedPathSegList()320 SVGPathSegListPropertyTearOff* SVGPathElement::animatedNormalizedPathSegList()
321 {
322     // FIXME: https://bugs.webkit.org/show_bug.cgi?id=15412 - Implement normalized path segment lists!
323     return 0;
324 }
325 
toPathData(Path & path) const326 void SVGPathElement::toPathData(Path& path) const
327 {
328     ASSERT(path.isEmpty());
329 
330     SVGPathParserFactory* factory = SVGPathParserFactory::self();
331     factory->buildPathFromByteStream(m_pathByteStream.get(), path);
332 }
333 
pathSegListChanged(SVGPathSegRole role)334 void SVGPathElement::pathSegListChanged(SVGPathSegRole role)
335 {
336     SVGPathParserFactory* factory = SVGPathParserFactory::self();
337 
338     switch (role) {
339     case PathSegNormalizedRole:
340         // FIXME: https://bugs.webkit.org/show_bug.cgi?id=15412 - Implement normalized path segment lists!
341         break;
342     case PathSegUnalteredRole:
343         m_pathByteStream->clear();
344         factory->buildSVGPathByteStreamFromSVGPathSegList(m_pathSegList.value, m_pathByteStream, UnalteredParsing);
345         break;
346     case PathSegUndefinedRole:
347         return;
348     }
349 
350     invalidateSVGAttributes();
351 
352     RenderSVGPath* renderer = static_cast<RenderSVGPath*>(this->renderer());
353     if (!renderer)
354         return;
355 
356     renderer->setNeedsPathUpdate();
357     RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
358 }
359 
360 }
361 
362 #endif // ENABLE(SVG)
363