1 /*
2 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
3 * Copyright (C) 2009 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 "Attribute.h"
27 #include "CSSFontFaceSrcValue.h"
28 #include "CachedFont.h"
29 #include "CachedResourceLoader.h"
30 #include "Document.h"
31 #include "SVGFontFaceElement.h"
32 #include "SVGNames.h"
33 #include "XLinkNames.h"
34
35 namespace WebCore {
36
37 using namespace SVGNames;
38
SVGFontFaceUriElement(const QualifiedName & tagName,Document * document)39 inline SVGFontFaceUriElement::SVGFontFaceUriElement(const QualifiedName& tagName, Document* document)
40 : SVGElement(tagName, document)
41 {
42 }
43
create(const QualifiedName & tagName,Document * document)44 PassRefPtr<SVGFontFaceUriElement> SVGFontFaceUriElement::create(const QualifiedName& tagName, Document* document)
45 {
46 return adoptRef(new SVGFontFaceUriElement(tagName, document));
47 }
48
~SVGFontFaceUriElement()49 SVGFontFaceUriElement::~SVGFontFaceUriElement()
50 {
51 if (m_cachedFont)
52 m_cachedFont->removeClient(this);
53 }
54
srcValue() const55 PassRefPtr<CSSFontFaceSrcValue> SVGFontFaceUriElement::srcValue() const
56 {
57 RefPtr<CSSFontFaceSrcValue> src = CSSFontFaceSrcValue::create(getAttribute(XLinkNames::hrefAttr));
58 AtomicString value(getAttribute(formatAttr));
59 src->setFormat(value.isEmpty() ? "svg" : value); // Default format
60 return src.release();
61 }
62
parseMappedAttribute(Attribute * attr)63 void SVGFontFaceUriElement::parseMappedAttribute(Attribute* attr)
64 {
65 const QualifiedName& attrName = attr->name();
66 if (attrName == XLinkNames::hrefAttr)
67 loadFont();
68 else
69 SVGElement::parseMappedAttribute(attr);
70 }
71
childrenChanged(bool changedByParser,Node * beforeChange,Node * afterChange,int childCountDelta)72 void SVGFontFaceUriElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
73 {
74 SVGElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
75
76 if (!parentNode() || !parentNode()->hasTagName(font_face_srcTag))
77 return;
78
79 ContainerNode* grandparent = parentNode()->parentNode();
80 if (grandparent && grandparent->hasTagName(font_faceTag))
81 static_cast<SVGFontFaceElement*>(grandparent)->rebuildFontFace();
82 }
83
insertedIntoDocument()84 void SVGFontFaceUriElement::insertedIntoDocument()
85 {
86 loadFont();
87 SVGElement::insertedIntoDocument();
88 }
89
loadFont()90 void SVGFontFaceUriElement::loadFont()
91 {
92 if (m_cachedFont)
93 m_cachedFont->removeClient(this);
94
95 String href = getAttribute(XLinkNames::hrefAttr);
96 if (!href.isNull()) {
97 CachedResourceLoader* cachedResourceLoader = document()->cachedResourceLoader();
98 m_cachedFont = cachedResourceLoader->requestFont(href);
99 if (m_cachedFont) {
100 m_cachedFont->addClient(this);
101 m_cachedFont->beginLoadIfNeeded(cachedResourceLoader);
102 }
103 } else
104 m_cachedFont = 0;
105 }
106
107 }
108
109 #endif // ENABLE(SVG_FONTS)
110