Home | History | Annotate | Download | only in svg 
      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 WebCore {
     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