void MarkupAccumulator::appendOpenTag(StringBuilder& result, const Element& element, Namespaces* namespaces)
{
result.append('<');
if (inXMLFragmentSerialization() && namespaces && element.prefix().isEmpty()) {
// According to http://www.w3.org/TR/DOM-Level-3-Core/namespaces-algorithms.html#normalizeDocumentAlgo we now should create
// a default namespace declaration to make this namespace well-formed. However, http://www.w3.org/TR/xml-names11/#xmlReserved states
// "The prefix xml MUST NOT be declared as the default namespace.", so use the xml prefix explicitly.
if (element.namespaceURI() == XMLNames::xmlNamespaceURI) {
result.append(xmlAtom);
result.append(':');
}
}
result.append(element.nodeNamePreservingCase());
if ((inXMLFragmentSerialization() || !element.document().isHTMLDocument()) && namespaces && shouldAddNamespaceElement(element))
appendNamespace(result, element.prefix(), element.namespaceURI(), *namespaces, inXMLFragmentSerialization());
}
// Rules of self-closure
// 1. No elements in HTML documents use the self-closing syntax.
// 2. Elements w/ children never self-close because they use a separate end tag.
// 3. HTML elements which do not have a "forbidden" end tag will close with a separate end tag.
// 4. Other elements self-close.
bool MarkupAccumulator::shouldSelfClose(const Node& node)
{
if (!inXMLFragmentSerialization() && node.document().isHTMLDocument())
return false;
if (node.hasChildNodes())
return false;
if (node.isHTMLElement() && !elementCannotHaveEndTag(node))
return false;
return 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);
}
void MarkupAccumulator::appendNamespace(StringBuilder& result, const AtomicString& prefix, const AtomicString& namespaceURI, Namespaces& namespaces, bool allowEmptyDefaultNS)
{
namespaces.checkConsistency();
if (namespaceURI.isEmpty()) {
// http://www.whatwg.org/specs/web-apps/current-work/multipage/the-xhtml-syntax.html#xml-fragment-serialization-algorithm
if (allowEmptyDefaultNS && namespaces.get(emptyAtom.impl())) {
result.append(' ');
result.append(xmlnsAtom.string());
result.appendLiteral("=\"\"");
}
return;
}
// Use emptyAtoms's impl() for both null and empty strings since the HashMap can't handle 0 as a key
AtomicStringImpl* pre = prefix.isEmpty() ? emptyAtom.impl() : prefix.impl();
AtomicStringImpl* foundNS = namespaces.get(pre);
if (foundNS != namespaceURI.impl()) {
namespaces.set(pre, namespaceURI.impl());
// Add namespace to prefix pair so we can do constraint checking later.
if (inXMLFragmentSerialization() && !prefix.isEmpty())
namespaces.set(namespaceURI.impl(), pre);
// Make sure xml prefix and namespace are always known to uphold the constraints listed at http://www.w3.org/TR/xml-names11/#xmlReserved.
if (namespaceURI.impl() == XMLNames::xmlNamespaceURI.impl())
return;
result.append(' ');
result.append(xmlnsAtom.string());
if (!prefix.isEmpty()) {
result.append(':');
result.append(prefix);
}
result.append('=');
result.append('"');
appendAttributeValue(result, namespaceURI, false);
result.append('"');
}
}
void MarkupAccumulator::serializeNodesWithNamespaces(Node& targetNode, Node* nodeToSkip, EChildrenOnly childrenOnly, const Namespaces* namespaces, Vector<QualifiedName>* tagNamesToSkip)
{
if (&targetNode == nodeToSkip)
return;
if (tagNamesToSkip && targetNode.isElementNode()) {
for (size_t i = 0; i < tagNamesToSkip->size(); ++i) {
if (targetNode.hasTagName(tagNamesToSkip->at(i)))
return;
}
}
Namespaces namespaceHash;
if (namespaces)
namespaceHash = *namespaces;
else if (inXMLFragmentSerialization()) {
// Make sure xml prefix and namespace are always known to uphold the constraints listed at http://www.w3.org/TR/xml-names11/#xmlReserved.
namespaceHash.set(xmlAtom.impl(), XMLNames::xmlNamespaceURI.impl());
namespaceHash.set(XMLNames::xmlNamespaceURI.impl(), xmlAtom.impl());
}
if (!childrenOnly)
appendStartTag(targetNode, &namespaceHash);
if (!(targetNode.document().isHTMLDocument() && elementCannotHaveEndTag(targetNode))) {
#if ENABLE(TEMPLATE_ELEMENT)
Node* current = targetNode.hasTagName(templateTag) ? toHTMLTemplateElement(targetNode).content()->firstChild() : targetNode.firstChild();
#else
Node* current = targetNode.firstChild();
#endif
for ( ; current; current = current->nextSibling())
serializeNodesWithNamespaces(*current, nodeToSkip, IncludeNode, &namespaceHash, tagNamesToSkip);
}
if (!childrenOnly)
appendEndTag(targetNode);
}
void MarkupAccumulator::appendAttribute(StringBuilder& result, 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() == 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 ((inXMLFragmentSerialization() || !documentIsHTML) && namespaces && shouldAddNamespaceAttribute(attribute, *namespaces))
appendNamespace(result, prefixedName.prefix(), prefixedName.namespaceURI(), *namespaces);
}
