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@@ -25,6 +25,7 @@
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#include <LibWeb/DOM/IDLEventListener.h>
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#include <LibWeb/DOM/LiveNodeList.h>
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#include <LibWeb/DOM/MutationType.h>
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+#include <LibWeb/DOM/NamedNodeMap.h>
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#include <LibWeb/DOM/Node.h>
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#include <LibWeb/DOM/NodeIterator.h>
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#include <LibWeb/DOM/ProcessingInstruction.h>
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@@ -43,6 +44,7 @@
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#include <LibWeb/Layout/Node.h>
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#include <LibWeb/Layout/TextNode.h>
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#include <LibWeb/Layout/Viewport.h>
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+#include <LibWeb/Namespace.h>
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#include <LibWeb/Painting/Paintable.h>
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#include <LibWeb/Painting/PaintableBox.h>
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@@ -1634,6 +1636,103 @@ bool Node::is_equal_node(Node const* other_node) const
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return true;
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}
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+// https://dom.spec.whatwg.org/#locate-a-namespace
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+Optional<String> Node::locate_a_namespace(Optional<String> const& prefix) const
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+{
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+ // To locate a namespace for a node using prefix, switch on the interface node implements:
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+
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+ // Element
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+ if (is<Element>(*this)) {
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+ // 1. If prefix is "xml", then return the XML namespace.
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+ if (prefix == "xml")
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+ return Web::Namespace::XML.to_string();
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+
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+ // 2. If prefix is "xmlns", then return the XMLNS namespace.
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+ if (prefix == "xmlns")
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+ return Web::Namespace::XMLNS.to_string();
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+
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+ // 3. If its namespace is non-null and its namespace prefix is prefix, then return namespace.
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+ auto& element = verify_cast<Element>(*this);
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+ if (element.namespace_uri().has_value() && element.prefix() == prefix)
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+ return element.namespace_uri()->to_string();
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+
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+ // 4. If it has an attribute whose namespace is the XMLNS namespace, namespace prefix is "xmlns", and local name is prefix,
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+ // or if prefix is null and it has an attribute whose namespace is the XMLNS namespace, namespace prefix is null,
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+ // and local name is "xmlns", then return its value if it is not the empty string, and null otherwise.
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+ if (auto* attributes = element.attributes()) {
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+ for (size_t i = 0; i < attributes->length(); ++i) {
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+ auto& attr = *attributes->item(i);
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+ if (attr.namespace_uri() == Web::Namespace::XMLNS) {
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+ if ((attr.prefix() == "xmlns" && attr.local_name() == prefix) || (!prefix.has_value() && !attr.prefix().has_value() && attr.local_name() == "xmlns")) {
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+ auto value = attr.value();
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+ if (!value.is_empty())
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+ return value;
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+
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+ return {};
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+ }
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+ }
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+ }
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+ }
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+
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+ // 5. If its parent element is null, then return null.
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+ auto* parent_element = element.parent_element();
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+ if (!element.parent_element())
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+ return {};
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+
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+ // 6. Return the result of running locate a namespace on its parent element using prefix.
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+ return parent_element->locate_a_namespace(prefix);
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+ }
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+
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+ // Document
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+ if (is<Document>(*this)) {
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+ // 1. If its document element is null, then return null.
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+ auto* document_element = verify_cast<Document>(*this).document_element();
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+ if (!document_element)
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+ return {};
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+
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+ // 2. Return the result of running locate a namespace on its document element using prefix.
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+ return document_element->locate_a_namespace(prefix);
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+ }
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+
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+ // DocumentType
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+ // DocumentFragment
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+ if (is<DocumentType>(*this) || is<DocumentFragment>(*this)) {
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+ // Return null.
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+ return {};
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+ }
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+
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+ // Attr
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+ if (is<Attr>(*this)) {
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+ // 1. If its element is null, then return null.
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+ auto* element = verify_cast<Attr>(*this).owner_element();
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+ if (!element)
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+ return {};
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+
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+ // 2. Return the result of running locate a namespace on its element using prefix.
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+ return element->locate_a_namespace(prefix);
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+ }
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+
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+ // Otherwise
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+ // 1. If its parent element is null, then return null.
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+ auto* parent_element = this->parent_element();
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+ if (!parent_element)
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+ return {};
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+
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+ // 2. Return the result of running locate a namespace on its parent element using prefix.
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+ return parent_element->locate_a_namespace(prefix);
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+}
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+
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+// https://dom.spec.whatwg.org/#dom-node-lookupnamespaceuri
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+Optional<String> Node::lookup_namespace_uri(Optional<String> prefix) const
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+{
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+ // 1. If prefix is the empty string, then set it to null.
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+ if (prefix.has_value() && prefix->is_empty())
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+ prefix = {};
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+
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+ // 2. Return the result of running locate a namespace for this using prefix.
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+ return locate_a_namespace(prefix);
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+}
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+
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// https://dom.spec.whatwg.org/#in-a-document-tree
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bool Node::in_a_document_tree() const
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{
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Tim Ledbetter