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      1 /*
      2  * Copyright (C) 2007 Eric Seidel <eric (at) 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 "core/svg/SVGFontFaceUriElement.h"
     25 
     26 #include "core/XLinkNames.h"
     27 #include "core/css/CSSFontFaceSrcValue.h"
     28 #include "core/dom/Document.h"
     29 #include "core/fetch/FetchRequest.h"
     30 #include "core/fetch/ResourceFetcher.h"
     31 #include "core/svg/SVGFontFaceElement.h"
     32 
     33 namespace blink {
     34 
     35 using namespace SVGNames;
     36 
     37 inline SVGFontFaceUriElement::SVGFontFaceUriElement(Document& document)
     38     : SVGElement(font_face_uriTag, document)
     39 {
     40 }
     41 
     42 DEFINE_NODE_FACTORY(SVGFontFaceUriElement)
     43 
     44 SVGFontFaceUriElement::~SVGFontFaceUriElement()
     45 {
     46     if (m_resource)
     47         m_resource->removeClient(this);
     48 }
     49 
     50 PassRefPtrWillBeRawPtr<CSSFontFaceSrcValue> SVGFontFaceUriElement::srcValue() const
     51 {
     52     RefPtrWillBeRawPtr<CSSFontFaceSrcValue> src = CSSFontFaceSrcValue::create(getAttribute(XLinkNames::hrefAttr));
     53     AtomicString value(fastGetAttribute(formatAttr));
     54     src->setFormat(value.isEmpty() ? AtomicString("svg", AtomicString::ConstructFromLiteral) : value); // Default format
     55     return src.release();
     56 }
     57 
     58 void SVGFontFaceUriElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     59 {
     60     if (name.matches(XLinkNames::hrefAttr))
     61         loadFont();
     62     else
     63         SVGElement::parseAttribute(name, value);
     64 }
     65 
     66 void SVGFontFaceUriElement::childrenChanged(const ChildrenChange& change)
     67 {
     68     SVGElement::childrenChanged(change);
     69 
     70     if (!isSVGFontFaceSrcElement(parentNode()))
     71         return;
     72 
     73     ContainerNode* grandparent = parentNode()->parentNode();
     74     if (isSVGFontFaceElement(grandparent))
     75         toSVGFontFaceElement(*grandparent).rebuildFontFace();
     76 }
     77 
     78 Node::InsertionNotificationRequest SVGFontFaceUriElement::insertedInto(ContainerNode* rootParent)
     79 {
     80     loadFont();
     81     return SVGElement::insertedInto(rootParent);
     82 }
     83 
     84 void SVGFontFaceUriElement::loadFont()
     85 {
     86     if (m_resource)
     87         m_resource->removeClient(this);
     88 
     89     const AtomicString& href = getAttribute(XLinkNames::hrefAttr);
     90     if (!href.isNull()) {
     91         ResourceFetcher* fetcher = document().fetcher();
     92         FetchRequest request(ResourceRequest(document().completeURL(href)), localName());
     93         m_resource = fetcher->fetchFont(request);
     94         if (m_resource) {
     95             m_resource->addClient(this);
     96             m_resource->beginLoadIfNeeded(fetcher);
     97         }
     98     } else {
     99         m_resource = 0;
    100     }
    101 }
    102 
    103 }
    104 
    105 #endif // ENABLE(SVG_FONTS)
    106