third_party/WebKit/Source/core/svg/SVGURIReference.h

   1 /*
   2  * Copyright (C) 2004, 2005, 2008, 2009 Nikolas Zimmermann <zimmermann@kde.org>
   3  * Copyright (C) 2004, 2005 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 #ifndef SVGURIReference_h
  22 #define SVGURIReference_h
  23
  24 #include "core/CoreExport.h"
  25 #include "core/dom/Document.h"
  26 #include "core/svg/SVGAnimatedString.h"
  27 #include "platform/heap/Handle.h"
  28
  29 namespace blink {
  30
  31 class Element;
  32
  33 class CORE_EXPORT SVGURIReference : public WillBeGarbageCollectedMixin {
  34 public:
  35     virtual ~SVGURIReference() { }
  36
  37     bool isKnownAttribute(const QualifiedName&);
  38     void addSupportedAttributes(HashSet<QualifiedName>&);
  39
  40     static AtomicString fragmentIdentifierFromIRIString(const String&, const TreeScope&);
  41     static Element* targetElementFromIRIString(const String&, const TreeScope&, AtomicString* = 0, Document* = 0);
  42
  43     static inline bool isExternalURIReference(const String& uri, const Document& document)
  44     {
  45         // Fragment-only URIs are always internal
  46         if (uri.startsWith('#'))
  47             return false;
  48
  49         // If the URI matches our documents URL, we're dealing with a local reference.
  50         KURL url = document.completeURL(uri);
  51         return !equalIgnoringFragmentIdentifier(url, document.url());
  52     }
  53
  54     const String& hrefString() const { return m_href->currentValue()->value(); }
  55
  56     // JS API
  57     SVGAnimatedString* href() const { return m_href.get(); }
  58
  59     DECLARE_VIRTUAL_TRACE();
  60
  61 protected:
  62     explicit SVGURIReference(SVGElement*);
  63
  64 private:
  65     RefPtrWillBeMember<SVGAnimatedString> m_href;
  66 };
  67
  68 } // namespace blink
  69
  70 #endif // SVGURIReference_h