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 "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 39 inline SVGFontFaceUriElement::SVGFontFaceUriElement(const QualifiedName& tagName, Document* document) 40 : SVGElement(tagName, document) 41 { 42 } 43 44 PassRefPtr<SVGFontFaceUriElement> SVGFontFaceUriElement::create(const QualifiedName& tagName, Document* document) 45 { 46 return adoptRef(new SVGFontFaceUriElement(tagName, document)); 47 } 48 49 SVGFontFaceUriElement::~SVGFontFaceUriElement() 50 { 51 if (m_cachedFont) 52 m_cachedFont->removeClient(this); 53 } 54 55 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 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 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 84 void SVGFontFaceUriElement::insertedIntoDocument() 85 { 86 loadFont(); 87 SVGElement::insertedIntoDocument(); 88 } 89 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