1/*
2 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
3 * Copyright (C) 2009-2017 Apple Inc. All rights reserved.
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#include "config.h"
22
23#if ENABLE(SVG_FONTS)
24#include "SVGFontFaceUriElement.h"
25
26#include "CSSFontFaceSrcValue.h"
27#include "CachedFont.h"
28#include "CachedResourceLoader.h"
29#include "CachedResourceRequest.h"
30#include "Document.h"
31#include "SVGFontFaceElement.h"
32#include "SVGNames.h"
33#include "XLinkNames.h"
34#include <wtf/IsoMallocInlines.h>
35
36namespace WebCore {
37
38WTF_MAKE_ISO_ALLOCATED_IMPL(SVGFontFaceUriElement);
39
40using namespace SVGNames;
41
42inline SVGFontFaceUriElement::SVGFontFaceUriElement(const QualifiedName& tagName, Document& document)
43 : SVGElement(tagName, document)
44{
45 ASSERT(hasTagName(font_face_uriTag));
46}
47
48Ref<SVGFontFaceUriElement> SVGFontFaceUriElement::create(const QualifiedName& tagName, Document& document)
49{
50 return adoptRef(*new SVGFontFaceUriElement(tagName, document));
51}
52
53SVGFontFaceUriElement::~SVGFontFaceUriElement()
54{
55 if (m_cachedFont)
56 m_cachedFont->removeClient(*this);
57}
58
59Ref<CSSFontFaceSrcValue> SVGFontFaceUriElement::srcValue() const
60{
61 auto src = CSSFontFaceSrcValue::create(getAttribute(SVGNames::hrefAttr, XLinkNames::hrefAttr), LoadedFromOpaqueSource::No);
62 AtomicString value(attributeWithoutSynchronization(formatAttr));
63 src.get().setFormat(value.isEmpty() ? "svg" : value); // Default format
64 return src;
65}
66
67void SVGFontFaceUriElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
68{
69 if (name == SVGNames::hrefAttr || name == XLinkNames::hrefAttr)
70 loadFont();
71 else
72 SVGElement::parseAttribute(name, value);
73}
74
75void SVGFontFaceUriElement::childrenChanged(const ChildChange& change)
76{
77 SVGElement::childrenChanged(change);
78
79 if (!parentNode() || !parentNode()->hasTagName(font_face_srcTag))
80 return;
81
82 auto grandparent = makeRefPtr(parentNode()->parentNode());
83 if (grandparent && grandparent->hasTagName(font_faceTag))
84 downcast<SVGFontFaceElement>(*grandparent).rebuildFontFace();
85}
86
87Node::InsertedIntoAncestorResult SVGFontFaceUriElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
88{
89 loadFont();
90 return SVGElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
91}
92
93static bool isSVGFontTarget(const SVGFontFaceUriElement& element)
94{
95 Ref<CSSFontFaceSrcValue> srcValue(element.srcValue());
96 return srcValue->isSVGFontTarget();
97}
98
99void SVGFontFaceUriElement::loadFont()
100{
101 if (m_cachedFont)
102 m_cachedFont->removeClient(*this);
103
104 const AtomicString& href = getAttribute(SVGNames::hrefAttr, XLinkNames::hrefAttr);
105 if (!href.isNull()) {
106 ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();
107 options.contentSecurityPolicyImposition = isInUserAgentShadowTree() ? ContentSecurityPolicyImposition::SkipPolicyCheck : ContentSecurityPolicyImposition::DoPolicyCheck;
108
109 CachedResourceLoader& cachedResourceLoader = document().cachedResourceLoader();
110 CachedResourceRequest request(ResourceRequest(document().completeURL(href)), options);
111 request.setInitiator(*this);
112 m_cachedFont = cachedResourceLoader.requestFont(WTFMove(request), isSVGFontTarget(*this)).value_or(nullptr);
113 if (m_cachedFont) {
114 m_cachedFont->addClient(*this);
115 m_cachedFont->beginLoadIfNeeded(cachedResourceLoader);
116 }
117 } else
118 m_cachedFont = nullptr;
119}
120
121}
122
123#endif // ENABLE(SVG_FONTS)
124