1/*
2 * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2006 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#include "config.h"
23#include "SVGURIReference.h"
24
25#include "Document.h"
26#include "Element.h"
27#include "SVGElement.h"
28#include <wtf/URL.h>
29#include "XLinkNames.h"
30
31namespace WebCore {
32
33SVGURIReference::SVGURIReference(SVGElement* contextElement)
34 : m_href(SVGAnimatedString::create(contextElement))
35{
36 static std::once_flag onceFlag;
37 std::call_once(onceFlag, [] {
38 PropertyRegistry::registerProperty<SVGNames::hrefAttr, &SVGURIReference::m_href>();
39 PropertyRegistry::registerProperty<XLinkNames::hrefAttr, &SVGURIReference::m_href>();
40 });
41}
42
43bool SVGURIReference::isKnownAttribute(const QualifiedName& attributeName)
44{
45 return PropertyRegistry::isKnownAttribute(attributeName);
46}
47
48void SVGURIReference::parseAttribute(const QualifiedName& name, const AtomicString& value)
49{
50 if (isKnownAttribute(name))
51 m_href->setBaseValInternal(value);
52}
53
54String SVGURIReference::fragmentIdentifierFromIRIString(const String& url, const Document& document)
55{
56 size_t start = url.find('#');
57 if (start == notFound)
58 return emptyString();
59
60 URL base = start ? URL(document.baseURL(), url.substring(0, start)) : document.baseURL();
61 String fragmentIdentifier = url.substring(start);
62 URL kurl(base, fragmentIdentifier);
63 if (equalIgnoringFragmentIdentifier(kurl, document.url()))
64 return fragmentIdentifier.substring(1);
65
66 // The url doesn't have any fragment identifier.
67 return emptyString();
68}
69
70auto SVGURIReference::targetElementFromIRIString(const String& iri, const TreeScope& treeScope, RefPtr<Document> externalDocument) -> TargetElementResult
71{
72 // If there's no fragment identifier contained within the IRI string, we can't lookup an element.
73 size_t startOfFragmentIdentifier = iri.find('#');
74 if (startOfFragmentIdentifier == notFound)
75 return { };
76
77 // Exclude the '#' character when determining the fragmentIdentifier.
78 auto id = iri.substring(startOfFragmentIdentifier + 1);
79 if (id.isEmpty())
80 return { };
81
82 auto& document = treeScope.documentScope();
83 auto url = document.completeURL(iri);
84 if (externalDocument) {
85 // Enforce that the referenced url matches the url of the document that we've loaded for it!
86 ASSERT(equalIgnoringFragmentIdentifier(url, externalDocument->url()));
87 return { externalDocument->getElementById(id), WTFMove(id) };
88 }
89
90 // Exit early if the referenced url is external, and we have no externalDocument given.
91 if (isExternalURIReference(iri, document))
92 return { nullptr, WTFMove(id) };
93
94 return { treeScope.getElementById(id), WTFMove(id) };
95}
96
97}
98