1/*
2 * Copyright (C) 2004, 2005, 2008, 2009 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
4 * Copyright (C) 2018-2019 Apple Inc. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22#pragma once
23
24#include "Document.h"
25#include "QualifiedName.h"
26#include "SVGPropertyOwnerRegistry.h"
27
28namespace WebCore {
29
30class SVGElement;
31
32class SVGURIReference {
33 WTF_MAKE_NONCOPYABLE(SVGURIReference);
34public:
35 virtual ~SVGURIReference() = default;
36
37 void parseAttribute(const QualifiedName&, const AtomicString&);
38
39 static String fragmentIdentifierFromIRIString(const String&, const Document&);
40
41 struct TargetElementResult {
42 RefPtr<Element> element;
43 String identifier;
44 };
45 static TargetElementResult targetElementFromIRIString(const String&, const TreeScope&, RefPtr<Document> externalDocument = nullptr);
46
47 static bool isExternalURIReference(const String& uri, const Document& document)
48 {
49 // Fragment-only URIs are always internal
50 if (uri.startsWith('#'))
51 return false;
52
53 // If the URI matches our documents URL, we're dealing with a local reference.
54 URL url = document.completeURL(uri);
55 ASSERT(!url.protocolIsData());
56 return !equalIgnoringFragmentIdentifier(url, document.url());
57 }
58
59 using PropertyRegistry = SVGPropertyOwnerRegistry<SVGURIReference>;
60
61 String href() const { return m_href->currentValue(); }
62 SVGAnimatedString& hrefAnimated() { return m_href; }
63
64protected:
65 SVGURIReference(SVGElement* contextElement);
66
67 static bool isKnownAttribute(const QualifiedName& attributeName);
68
69private:
70 Ref<SVGAnimatedString> m_href;
71};
72
73} // namespace WebCore
74