jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2021, Tim Flynn <trflynn89@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <LibWeb/Bindings/Intrinsics.h>
8#include <LibWeb/DOM/Attr.h>
9#include <LibWeb/DOM/Document.h>
10#include <LibWeb/DOM/Element.h>
11#include <LibWeb/DOM/MutationType.h>
12#include <LibWeb/DOM/StaticNodeList.h>
13
14namespace Web::DOM {
15
16WebIDL::ExceptionOr<JS::NonnullGCPtr<Attr>> Attr::create(Document& document, DeprecatedFlyString local_name, DeprecatedString value, Element const* owner_element)
17{
18 return MUST_OR_THROW_OOM(document.heap().allocate<Attr>(document.realm(), document, QualifiedName(move(local_name), {}, {}), move(value), owner_element));
19}
20
21WebIDL::ExceptionOr<JS::NonnullGCPtr<Attr>> Attr::create(Document& document, QualifiedName qualified_name, DeprecatedString value, Element const* owner_element)
22{
23 return MUST_OR_THROW_OOM(document.heap().allocate<Attr>(document.realm(), document, move(qualified_name), move(value), owner_element));
24}
25
26JS::NonnullGCPtr<Attr> Attr::clone(Document& document)
27{
28 return *heap().allocate<Attr>(realm(), document, m_qualified_name, m_value, nullptr).release_allocated_value_but_fixme_should_propagate_errors();
29}
30
31Attr::Attr(Document& document, QualifiedName qualified_name, DeprecatedString value, Element const* owner_element)
32 : Node(document, NodeType::ATTRIBUTE_NODE)
33 , m_qualified_name(move(qualified_name))
34 , m_value(move(value))
35 , m_owner_element(owner_element)
36{
37}
38
39JS::ThrowCompletionOr<void> Attr::initialize(JS::Realm& realm)
40{
41 MUST_OR_THROW_OOM(Base::initialize(realm));
42 set_prototype(&Bindings::ensure_web_prototype<Bindings::AttrPrototype>(realm, "Attr"));
43
44 return {};
45}
46
47void Attr::visit_edges(Cell::Visitor& visitor)
48{
49 Base::visit_edges(visitor);
50 visitor.visit(m_owner_element.ptr());
51}
52
53Element const* Attr::owner_element() const
54{
55 return m_owner_element.ptr();
56}
57
58void Attr::set_owner_element(Element const* owner_element)
59{
60 m_owner_element = owner_element;
61}
62
63// https://dom.spec.whatwg.org/#set-an-existing-attribute-value
64void Attr::set_value(DeprecatedString value)
65{
66 // 1. If attribute’s element is null, then set attribute’s value to value.
67 if (!owner_element()) {
68 m_value = move(value);
69 return;
70 }
71
72 // 2. Otherwise, change attribute to value.
73 // https://dom.spec.whatwg.org/#concept-element-attributes-change
74 // 1. Handle attribute changes for attribute with attribute’s element, attribute’s value, and value.
75 handle_attribute_changes(*owner_element(), m_value, value);
76
77 // 2. Set attribute’s value to value.
78 m_value = move(value);
79}
80
81// https://dom.spec.whatwg.org/#handle-attribute-changes
82void Attr::handle_attribute_changes(Element const& element, DeprecatedString const& old_value, [[maybe_unused]] DeprecatedString const& new_value)
83{
84 // 1. Queue a mutation record of "attributes" for element with attribute’s local name, attribute’s namespace, oldValue, « », « », null, and null.
85 auto added_node_list = StaticNodeList::create(realm(), {}).release_value_but_fixme_should_propagate_errors();
86 auto removed_node_list = StaticNodeList::create(realm(), {}).release_value_but_fixme_should_propagate_errors();
87 element.queue_mutation_record(MutationType::attributes, local_name(), namespace_uri(), old_value, added_node_list, removed_node_list, nullptr, nullptr);
88
89 // FIXME: 2. If element is custom, then enqueue a custom element callback reaction with element, callback name "attributeChangedCallback", and an argument list containing attribute’s local name, oldValue, newValue, and attribute’s namespace.
90
91 // FIXME: 3. Run the attribute change steps with element, attribute’s local name, oldValue, newValue, and attribute’s namespace.
92}
93
94}