SVGFontFaceUriElement.cpp [plain text]
#include "config.h"
#if ENABLE(SVG_FONTS)
#include "SVGFontFaceUriElement.h"
#include "Attribute.h"
#include "CSSFontFaceSrcValue.h"
#include "CachedFont.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "Document.h"
#include "SVGFontFaceElement.h"
#include "SVGNames.h"
#include "XLinkNames.h"
namespace WebCore {
using namespace SVGNames;
inline SVGFontFaceUriElement::SVGFontFaceUriElement(const QualifiedName& tagName, Document& document)
: SVGElement(tagName, document)
{
ASSERT(hasTagName(font_face_uriTag));
}
PassRefPtr<SVGFontFaceUriElement> SVGFontFaceUriElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(new SVGFontFaceUriElement(tagName, document));
}
SVGFontFaceUriElement::~SVGFontFaceUriElement()
{
if (m_cachedFont)
m_cachedFont->removeClient(this);
}
PassRef<CSSFontFaceSrcValue> SVGFontFaceUriElement::srcValue() const
{
auto src = CSSFontFaceSrcValue::create(getAttribute(XLinkNames::hrefAttr));
AtomicString value(fastGetAttribute(formatAttr));
src.get().setFormat(value.isEmpty() ? "svg" : value); return src;
}
void SVGFontFaceUriElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
if (name == XLinkNames::hrefAttr)
loadFont();
else
SVGElement::parseAttribute(name, value);
}
void SVGFontFaceUriElement::childrenChanged(const ChildChange& change)
{
SVGElement::childrenChanged(change);
if (!parentNode() || !parentNode()->hasTagName(font_face_srcTag))
return;
ContainerNode* grandparent = parentNode()->parentNode();
if (grandparent && grandparent->hasTagName(font_faceTag))
toSVGFontFaceElement(grandparent)->rebuildFontFace();
}
Node::InsertionNotificationRequest SVGFontFaceUriElement::insertedInto(ContainerNode& rootParent)
{
loadFont();
return SVGElement::insertedInto(rootParent);
}
void SVGFontFaceUriElement::loadFont()
{
if (m_cachedFont)
m_cachedFont->removeClient(this);
const AtomicString& href = getAttribute(XLinkNames::hrefAttr);
if (!href.isNull()) {
CachedResourceLoader* cachedResourceLoader = document().cachedResourceLoader();
CachedResourceRequest request(ResourceRequest(document().completeURL(href)));
request.setInitiator(this);
m_cachedFont = cachedResourceLoader->requestFont(request);
if (m_cachedFont) {
m_cachedFont->addClient(this);
m_cachedFont->beginLoadIfNeeded(cachedResourceLoader);
}
} else
m_cachedFont = 0;
}
}
#endif // ENABLE(SVG_FONTS)