1 /* 2 * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann (at) kde.org> 3 * Copyright (C) 2004, 2005, 2006 Rob Buis <buis (at) 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 #include "core/svg/SVGURIReference.h" 23 24 #include "core/XLinkNames.h" 25 #include "core/svg/SVGElement.h" 26 #include "platform/weborigin/KURL.h" 27 28 namespace blink { 29 30 SVGURIReference::SVGURIReference(SVGElement* element) 31 : m_href(SVGAnimatedString::create(element, XLinkNames::hrefAttr, SVGString::create())) 32 { 33 ASSERT(element); 34 element->addToPropertyMap(m_href); 35 } 36 37 bool SVGURIReference::isKnownAttribute(const QualifiedName& attrName) 38 { 39 return attrName.matches(XLinkNames::hrefAttr); 40 } 41 42 AtomicString SVGURIReference::fragmentIdentifierFromIRIString(const String& url, const TreeScope& treeScope) 43 { 44 size_t start = url.find('#'); 45 if (start == kNotFound) 46 return emptyAtom; 47 48 const Document& document = treeScope.document(); 49 KURL base = start ? KURL(document.baseURI(), url.substring(0, start)) : document.baseURI(); 50 if (equalIgnoringFragmentIdentifier(base, document.url())) 51 return AtomicString(url.substring(start + 1)); 52 53 return emptyAtom; 54 } 55 56 static inline KURL urlFromIRIStringWithFragmentIdentifier(const String& url, const TreeScope& treeScope, AtomicString& fragmentIdentifier) 57 { 58 size_t startOfFragmentIdentifier = url.find('#'); 59 if (startOfFragmentIdentifier == kNotFound) 60 return KURL(); 61 62 const Document& document = treeScope.document(); 63 64 // Exclude the '#' character when determining the fragmentIdentifier. 65 fragmentIdentifier = AtomicString(url.substring(startOfFragmentIdentifier + 1)); 66 if (startOfFragmentIdentifier) { 67 KURL base(document.baseURI(), url.substring(0, startOfFragmentIdentifier)); 68 return KURL(base, url.substring(startOfFragmentIdentifier)); 69 } 70 71 return KURL(document.baseURI(), url.substring(startOfFragmentIdentifier)); 72 } 73 74 Element* SVGURIReference::targetElementFromIRIString(const String& iri, const TreeScope& treeScope, AtomicString* fragmentIdentifier, Document* externalDocument) 75 { 76 const Document& document = treeScope.document(); 77 78 // If there's no fragment identifier contained within the IRI string, we can't lookup an element. 79 AtomicString id; 80 KURL url = urlFromIRIStringWithFragmentIdentifier(iri, document, id); 81 if (url == KURL()) 82 return 0; 83 84 if (fragmentIdentifier) 85 *fragmentIdentifier = id; 86 87 if (id.isEmpty()) 88 return 0; 89 90 if (externalDocument) { 91 // Enforce that the referenced url matches the url of the document that we've loaded for it! 92 ASSERT(equalIgnoringFragmentIdentifier(url, externalDocument->url())); 93 return externalDocument->getElementById(id); 94 } 95 96 // Exit early if the referenced url is external, and we have no externalDocument given. 97 if (isExternalURIReference(iri, document)) 98 return 0; 99 100 return treeScope.getElementById(id); 101 } 102 103 void SVGURIReference::addSupportedAttributes(HashSet<QualifiedName>& supportedAttributes) 104 { 105 supportedAttributes.add(XLinkNames::hrefAttr); 106 } 107 108 bool SVGURIReference::parseAttribute(const QualifiedName& name, const AtomicString& value, SVGParsingError& parseError) 109 { 110 if (name.matches(XLinkNames::hrefAttr)) { 111 m_href->setBaseValueAsString(value, parseError); 112 return true; 113 } 114 return false; 115 } 116 117 } 118