jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <AK/HashTable.h>
8#include <LibWeb/DOM/QualifiedName.h>
9
10namespace Web::DOM {
11
12struct ImplTraits : public Traits<QualifiedName::Impl*> {
13 static unsigned hash(QualifiedName::Impl* impl)
14 {
15 return pair_int_hash(impl->local_name.hash(), pair_int_hash(impl->prefix.hash(), impl->namespace_.hash()));
16 }
17
18 static bool equals(QualifiedName::Impl* a, QualifiedName::Impl* b)
19 {
20 return a->local_name == b->local_name
21 && a->prefix == b->prefix
22 && a->namespace_ == b->namespace_;
23 }
24};
25
26static HashTable<QualifiedName::Impl*, ImplTraits> impls;
27
28static NonnullRefPtr<QualifiedName::Impl> ensure_impl(DeprecatedFlyString const& local_name, DeprecatedFlyString const& prefix, DeprecatedFlyString const& namespace_)
29{
30 auto hash = pair_int_hash(local_name.hash(), pair_int_hash(prefix.hash(), namespace_.hash()));
31 auto it = impls.find(hash, [&](QualifiedName::Impl* entry) {
32 return entry->local_name == local_name
33 && entry->prefix == prefix
34 && entry->namespace_ == namespace_;
35 });
36 if (it != impls.end())
37 return *(*it);
38 return adopt_ref(*new QualifiedName::Impl(local_name, prefix, namespace_));
39}
40
41QualifiedName::QualifiedName(DeprecatedFlyString const& local_name, DeprecatedFlyString const& prefix, DeprecatedFlyString const& namespace_)
42 : m_impl(ensure_impl(local_name, prefix, namespace_))
43{
44}
45
46QualifiedName::Impl::Impl(DeprecatedFlyString const& a_local_name, DeprecatedFlyString const& a_prefix, DeprecatedFlyString const& a_namespace)
47 : local_name(a_local_name)
48 , prefix(a_prefix)
49 , namespace_(a_namespace)
50{
51 impls.set(this);
52 make_internal_string();
53}
54
55QualifiedName::Impl::~Impl()
56{
57 impls.remove(this);
58}
59
60// https://dom.spec.whatwg.org/#concept-attribute-qualified-name
61// https://dom.spec.whatwg.org/#concept-element-qualified-name
62void QualifiedName::Impl::make_internal_string()
63{
64 // This is possible to do according to the spec: "User agents could have this as an internal slot as an optimization."
65 if (prefix.is_null()) {
66 as_string = local_name;
67 return;
68 }
69
70 as_string = DeprecatedString::formatted("{}:{}", prefix, local_name);
71}
72
73}