void MarkupFormatter::appendAttribute(StringBuilder& result, const Element& element, const Attribute& attribute, Namespaces* namespaces)
{
bool documentIsHTML = serializeAsHTMLDocument(element);
QualifiedName prefixedName = attribute.name();
if (documentIsHTML && !attributeIsInSerializedNamespace(attribute)) {
result.append(' ');
result.append(attribute.name().localName());
} else {
if (attribute.namespaceURI() == XMLNSNames::xmlnsNamespaceURI) {
if (!attribute.prefix() && attribute.localName() != xmlnsAtom)
prefixedName.setPrefix(xmlnsAtom);
if (namespaces) { // Account for the namespace attribute we're about to append.
const AtomicString& lookupKey = (!attribute.prefix()) ? emptyAtom : attribute.localName();
namespaces->set(lookupKey, attribute.value());
}
} else if (attribute.namespaceURI() == XMLNames::xmlNamespaceURI) {
if (!attribute.prefix())
prefixedName.setPrefix(xmlAtom);
} else {
if (attribute.namespaceURI() == XLinkNames::xlinkNamespaceURI) {
if (!attribute.prefix())
prefixedName.setPrefix(xlinkAtom);
}
if (namespaces && shouldAddNamespaceAttribute(attribute, element)) {
if (!prefixedName.prefix()) {
// This behavior is in process of being standardized. See crbug.com/248044 and https://www.w3.org/Bugs/Public/show_bug.cgi?id=24208
String prefixPrefix("ns", 2);
for (unsigned i = attribute.namespaceURI().impl()->existingHash(); ; ++i) {
AtomicString newPrefix(String(prefixPrefix + String::number(i)));
AtomicString foundURI = namespaces->get(newPrefix);
if (foundURI == attribute.namespaceURI() || foundURI == nullAtom) {
// We already generated a prefix for this namespace.
prefixedName.setPrefix(newPrefix);
break;
}
}
}
ASSERT(prefixedName.prefix());
appendNamespace(result, prefixedName.prefix(), attribute.namespaceURI(), *namespaces);
}
}
result.append(' ');
result.append(prefixedName.toString());
}
result.append('=');
if (element.isURLAttribute(attribute)) {
appendQuotedURLAttributeValue(result, element, attribute);
} else {
result.append('"');
appendAttributeValue(result, attribute.value(), documentIsHTML);
result.append('"');
}
}
void SVGLangSpace::addSupportedAttributes(HashSet<QualifiedName>& supportedAttributes)
{
DEFINE_STATIC_LOCAL(AtomicString, xmlPrefix, ("xml", AtomicString::ConstructFromLiteral));
QualifiedName langWithPrefix = XMLNames::langAttr;
langWithPrefix.setPrefix(xmlPrefix);
supportedAttributes.add(langWithPrefix);
supportedAttributes.add(XMLNames::langAttr);
QualifiedName spaceWithPrefix = XMLNames::spaceAttr;
spaceWithPrefix.setPrefix(xmlPrefix);
supportedAttributes.add(spaceWithPrefix);
supportedAttributes.add(XMLNames::spaceAttr);
}
void SVGLangSpace::addSupportedAttributes(HashSet<QualifiedName>& supportedAttributes)
{
static NeverDestroyed<AtomicString> xmlPrefix("xml", AtomicString::ConstructFromLiteral);
QualifiedName langWithPrefix = XMLNames::langAttr;
langWithPrefix.setPrefix(xmlPrefix);
supportedAttributes.add(langWithPrefix);
supportedAttributes.add(XMLNames::langAttr);
QualifiedName spaceWithPrefix = XMLNames::spaceAttr;
spaceWithPrefix.setPrefix(xmlPrefix);
supportedAttributes.add(spaceWithPrefix);
supportedAttributes.add(XMLNames::spaceAttr);
}
void SVGURIReference::addSupportedAttributes(HashSet<QualifiedName>& supportedAttributes)
{
DEFINE_STATIC_LOCAL(AtomicString, xlinkPrefix, ("xlink"));
QualifiedName hrefWithPrefix = XLinkNames::hrefAttr;
hrefWithPrefix.setPrefix(xlinkPrefix);
supportedAttributes.add(hrefWithPrefix);
supportedAttributes.add(XLinkNames::hrefAttr);
}
void MarkupAccumulator::appendAttribute(StringBuilder& result, const Element& element, const Attribute& attribute, Namespaces* namespaces)
{
bool documentIsHTML = serializeAsHTMLDocument(element);
result.append(' ');
QualifiedName prefixedName = attribute.name();
if (documentIsHTML && !attributeIsInSerializedNamespace(attribute)) {
result.append(attribute.name().localName());
} else {
if (attribute.namespaceURI() == XLinkNames::xlinkNamespaceURI) {
if (!attribute.prefix())
prefixedName.setPrefix(xlinkAtom);
} else if (attribute.namespaceURI() == XMLNames::xmlNamespaceURI) {
if (!attribute.prefix())
prefixedName.setPrefix(xmlAtom);
} else if (attribute.namespaceURI() == XMLNSNames::xmlnsNamespaceURI) {
if (attribute.name() != XMLNSNames::xmlnsAttr && !attribute.prefix())
prefixedName.setPrefix(xmlnsAtom);
}
result.append(prefixedName.toString());
}
result.append('=');
if (element.isURLAttribute(attribute)) {
appendQuotedURLAttributeValue(result, element, attribute);
} else {
result.append('"');
appendAttributeValue(result, attribute.value(), documentIsHTML);
result.append('"');
}
if (!documentIsHTML && namespaces && shouldAddNamespaceAttribute(attribute, *namespaces))
appendNamespace(result, prefixedName.prefix(), prefixedName.namespaceURI(), *namespaces);
}
void MarkupAccumulator::generateUniquePrefix(QualifiedName& prefixedName, const Namespaces& namespaces)
{
// http://www.w3.org/TR/DOM-Level-3-Core/namespaces-algorithms.html#normalizeDocumentAlgo
// Find a prefix following the pattern "NS" + index (starting at 1) and make sure this
// prefix is not declared in the current scope.
StringBuilder builder;
do {
builder.clear();
builder.append("NS");
builder.appendNumber(++m_prefixLevel);
const AtomicString& name = builder.toAtomicString();
if (!namespaces.get(name.impl())) {
prefixedName.setPrefix(name);
return;
}
} while (true);
}
void MarkupAccumulator::appendAttribute(StringBuilder& result, const Element& element, const Attribute& attribute, Namespaces* namespaces)
{
bool documentIsHTML = element.document().isHTMLDocument();
result.append(' ');
QualifiedName prefixedName = attribute.name();
if (documentIsHTML && !attributeIsInSerializedNamespace(attribute))
result.append(attribute.name().localName());
else {
if (!attribute.namespaceURI().isEmpty()) {
AtomicStringImpl* foundNS = namespaces && attribute.prefix().impl() ? namespaces->get(attribute.prefix().impl()) : 0;
bool prefixIsAlreadyMappedToOtherNS = foundNS && foundNS != attribute.namespaceURI().impl();
if (attribute.prefix().isEmpty() || !foundNS || prefixIsAlreadyMappedToOtherNS) {
if (AtomicStringImpl* prefix = namespaces ? namespaces->get(attribute.namespaceURI().impl()) : 0)
prefixedName.setPrefix(AtomicString(prefix));
else {
bool shouldBeDeclaredUsingAppendNamespace = !attribute.prefix().isEmpty() && !foundNS;
if (!shouldBeDeclaredUsingAppendNamespace && attribute.localName() != xmlnsAtom && namespaces)
generateUniquePrefix(prefixedName, *namespaces);
}
}
}
result.append(prefixedName.toString());
}
result.append('=');
if (element.isURLAttribute(attribute))
appendQuotedURLAttributeValue(result, element, attribute);
else {
result.append('"');
appendAttributeValue(result, attribute.value(), documentIsHTML);
result.append('"');
}
if ((inXMLFragmentSerialization() || !documentIsHTML) && namespaces && shouldAddNamespaceAttribute(attribute, *namespaces))
appendNamespace(result, prefixedName.prefix(), prefixedName.namespaceURI(), *namespaces);
}