mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-20 09:49:15 +03:00
cf5eeb9f4b
Adopt the same pattern as AK::FlyString, reducing sizeof(QualifiedName) to the size of a pointer. This reduces the size of DOM::Element by 24 bytes.
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
/*
|
|
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/HashTable.h>
|
|
#include <LibWeb/DOM/QualifiedName.h>
|
|
|
|
namespace Web::DOM {
|
|
|
|
struct ImplTraits : public Traits<QualifiedName::Impl*> {
|
|
static unsigned hash(QualifiedName::Impl* impl)
|
|
{
|
|
return pair_int_hash(impl->local_name.hash(), pair_int_hash(impl->prefix.hash(), impl->namespace_.hash()));
|
|
}
|
|
|
|
static bool equals(QualifiedName::Impl* a, QualifiedName::Impl* b)
|
|
{
|
|
return a->local_name == b->local_name
|
|
&& a->prefix == b->prefix
|
|
&& a->namespace_ == b->namespace_;
|
|
}
|
|
};
|
|
|
|
static HashTable<QualifiedName::Impl*, ImplTraits> impls;
|
|
|
|
static NonnullRefPtr<QualifiedName::Impl> ensure_impl(FlyString const& local_name, FlyString const& prefix, FlyString const& namespace_)
|
|
{
|
|
auto hash = pair_int_hash(local_name.hash(), pair_int_hash(prefix.hash(), namespace_.hash()));
|
|
auto it = impls.find(hash, [&](QualifiedName::Impl* entry) {
|
|
return entry->local_name == local_name
|
|
&& entry->prefix == prefix
|
|
&& entry->namespace_ == namespace_;
|
|
});
|
|
if (it != impls.end())
|
|
return *(*it);
|
|
return adopt_ref(*new QualifiedName::Impl(local_name, prefix, namespace_));
|
|
}
|
|
|
|
QualifiedName::QualifiedName(FlyString const& local_name, FlyString const& prefix, FlyString const& namespace_)
|
|
: m_impl(ensure_impl(local_name, prefix, namespace_))
|
|
{
|
|
}
|
|
|
|
QualifiedName::Impl::Impl(FlyString const& a_local_name, FlyString const& a_prefix, FlyString const& a_namespace)
|
|
: local_name(a_local_name)
|
|
, prefix(a_prefix)
|
|
, namespace_(a_namespace)
|
|
{
|
|
impls.set(this);
|
|
make_internal_string();
|
|
}
|
|
|
|
QualifiedName::Impl::~Impl()
|
|
{
|
|
impls.remove(this);
|
|
}
|
|
|
|
// https://dom.spec.whatwg.org/#concept-attribute-qualified-name
|
|
// https://dom.spec.whatwg.org/#concept-element-qualified-name
|
|
void QualifiedName::Impl::make_internal_string()
|
|
{
|
|
// This is possible to do according to the spec: "User agents could have this as an internal slot as an optimization."
|
|
if (prefix.is_null()) {
|
|
as_string = local_name;
|
|
return;
|
|
}
|
|
|
|
as_string = String::formatted("{}:{}", prefix, local_name);
|
|
}
|
|
|
|
}
|