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LibWeb: Implement Node.lookupNamespaceURI()
This method takes a prefix and returns the namespace URI associated with it on the given node, or null if no namespace is found.
This commit is contained in:
parent
d106b6eae2
commit
27d429a85f
Notes:
sideshowbarker
2024-07-18 23:46:13 +09:00
Author: https://github.com/tcl3 Commit: https://github.com/LadybirdBrowser/ladybird/commit/27d429a85f3 Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/693
20
Tests/LibWeb/Text/expected/DOM/Node-lookupNamespaceURI.txt
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20
Tests/LibWeb/Text/expected/DOM/Node-lookupNamespaceURI.txt
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@ -0,0 +1,20 @@
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documentFragment.lookupNamespaceURI(null): null
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documentFragment.lookupNamespaceURI(""): null
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documentFragment.lookupNamespaceURI("foo"): null
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documentFragment.lookupNamespaceURI("xml"): null
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documentFragment.lookupNamespaceURI("xmlns"): null
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docType.lookupNamespaceURI(null): null
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docType.lookupNamespaceURI(""): null
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docType.lookupNamespaceURI("foo"): null
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docType.lookupNamespaceURI("xml"): null
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docType.lookupNamespaceURI("xmlns"): null
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element.lookupNamespaceURI(null): null
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element.lookupNamespaceURI(""): null
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element.lookupNamespaceURI("foo"): null
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element.lookupNamespaceURI("xml"): http://www.w3.org/XML/1998/namespace
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element.lookupNamespaceURI("xmlns"): http://www.w3.org/2000/xmlns/
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After setting element attribute xmlns:bar='exampleNamespaceURI'
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element.lookupNamespaceURI(null): null
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element.lookupNamespaceURI(""): null
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element.lookupNamespaceURI("foo"): null
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element.lookupNamespaceURI("bar"): exampleNamespaceURI
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43
Tests/LibWeb/Text/input/DOM/Node-lookupNamespaceURI.html
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43
Tests/LibWeb/Text/input/DOM/Node-lookupNamespaceURI.html
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@ -0,0 +1,43 @@
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<!DOCTYPE html>
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<script src="../include.js"></script>
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<script>
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function testLookupNamespaceURI(node, prefix, name) {
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let prefixName = prefix;
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if (prefixName !== null)
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prefixName = `"${prefix}"`;
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println(`${name}.lookupNamespaceURI(${prefixName}): ${node.lookupNamespaceURI(prefix)}`);
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}
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test(() => {
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const documentFragment = document.createDocumentFragment();
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testLookupNamespaceURI(documentFragment, null, "documentFragment");
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testLookupNamespaceURI(documentFragment, "", "documentFragment");
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testLookupNamespaceURI(documentFragment, "foo", "documentFragment");
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testLookupNamespaceURI(documentFragment, "xml", "documentFragment");
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testLookupNamespaceURI(documentFragment, "xmlns", "documentFragment");
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const docType = document.doctype;
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testLookupNamespaceURI(docType, null, "docType");
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testLookupNamespaceURI(docType, "", "docType");
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testLookupNamespaceURI(docType, "foo", "docType");
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testLookupNamespaceURI(docType, "xml", "docType");
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testLookupNamespaceURI(docType, "xmlns", "docType");
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const element = document.createElementNS("namespace", "prefix:element");
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element.setAttribute("bar", "value");
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testLookupNamespaceURI(element, null, "element");
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testLookupNamespaceURI(element, "", "element");
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testLookupNamespaceURI(element, "foo", "element");
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testLookupNamespaceURI(element, "xml", "element");
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testLookupNamespaceURI(element, "xmlns", "element");
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const XMLNS_NS = "http://www.w3.org/2000/xmlns/";
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element.setAttributeNS(XMLNS_NS, 'xmlns:bar', 'exampleNamespaceURI');
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println("After setting element attribute xmlns:bar='exampleNamespaceURI'");
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testLookupNamespaceURI(element, null, "element");
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testLookupNamespaceURI(element, "", "element");
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testLookupNamespaceURI(element, "foo", "element");
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testLookupNamespaceURI(element, "bar", "element");
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});
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</script>
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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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// 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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// 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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// 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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// 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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return {};
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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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// 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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// 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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// 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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// 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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// 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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// 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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// 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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// 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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// 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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// 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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// 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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@ -695,6 +695,9 @@ public:
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ErrorOr<String> accessible_name(Document const&) const;
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ErrorOr<String> accessible_description(Document const&) const;
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Optional<String> locate_a_namespace(Optional<String> const& prefix) const;
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Optional<String> lookup_namespace_uri(Optional<String> prefix) const;
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protected:
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Node(JS::Realm&, Document&, NodeType);
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Node(Document&, NodeType);
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@ -55,7 +55,7 @@ interface Node : EventTarget {
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boolean contains(Node? other);
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[FIXME] DOMString? lookupPrefix(DOMString? namespace);
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[FIXME] DOMString? lookupNamespaceURI(DOMString? prefix);
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DOMString? lookupNamespaceURI(DOMString? prefix);
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[FIXME] boolean isDefaultNamespace(DOMString? namespace);
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[ImplementedAs=pre_insert, CEReactions] Node insertBefore(Node node, Node? child);
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