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      1 /*
      2  * Copyright (C) 2004, 2005, 2008, 2009 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005 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 #ifndef SVGURIReference_h
     22 #define SVGURIReference_h
     23 
     24 #include "core/dom/Document.h"
     25 #include "core/svg/SVGAnimatedString.h"
     26 
     27 namespace blink {
     28 
     29 class Element;
     30 
     31 class SVGURIReference {
     32 public:
     33     virtual ~SVGURIReference() { }
     34 
     35     bool isKnownAttribute(const QualifiedName&);
     36     void addSupportedAttributes(HashSet<QualifiedName>&);
     37 
     38     static AtomicString fragmentIdentifierFromIRIString(const String&, const TreeScope&);
     39     static Element* targetElementFromIRIString(const String&, const TreeScope&, AtomicString* = 0, Document* = 0);
     40 
     41     static inline bool isExternalURIReference(const String& uri, const Document& document)
     42     {
     43         // Fragment-only URIs are always internal
     44         if (uri.startsWith('#'))
     45             return false;
     46 
     47         // If the URI matches our documents URL, we're dealing with a local reference.
     48         KURL url = document.completeURL(uri);
     49         return !equalIgnoringFragmentIdentifier(url, document.url());
     50     }
     51 
     52     const String& hrefString() const { return m_href->currentValue()->value(); }
     53     bool parseAttribute(const QualifiedName&, const AtomicString& value, SVGParsingError&);
     54 
     55     // JS API
     56     SVGAnimatedString* href() const { return m_href.get(); }
     57 
     58 protected:
     59     explicit SVGURIReference(SVGElement*);
     60 
     61 private:
     62     RefPtr<SVGAnimatedString> m_href;
     63 };
     64 
     65 } // namespace blink
     66 
     67 #endif // SVGURIReference_h
     68