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/dom/Document.h"
25#include "core/svg/SVGAnimatedString.h"
26
27namespace blink {
28
29class Element;
30
31class SVGURIReference {
32public:
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
58protected:
59    explicit SVGURIReference(SVGElement*);
60
61private:
62    RefPtr<SVGAnimatedString> m_href;
63};
64
65} // namespace blink
66
67#endif // SVGURIReference_h
68