ladybird/Userland/Libraries/LibWeb/CSS/CSSNamespaceRule.cpp
Andreas Kling c0d7f748ed LibWeb: Avoid FlyString lookups when setting IDL interface prototypes
This commit introduces a WEB_SET_PROTOTYPE_FOR_INTERFACE macro that
caches the interface name in a local static FlyString. This means that
we only pay for FlyString-from-literal lookup once per browser lifetime
instead of every time the interface is instantiated.
2024-03-16 16:35:54 +01:00

60 lines
1.8 KiB
C++

/*
* Copyright (c) 2023, Jonah Shafran <jonahshafran@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Heap/Heap.h>
#include <LibJS/Runtime/Realm.h>
#include <LibWeb/Bindings/CSSNamespaceRulePrototype.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/CSS/CSSNamespaceRule.h>
#include <LibWeb/CSS/Serialize.h>
#include <LibWeb/WebIDL/ExceptionOr.h>
namespace Web::CSS {
JS_DEFINE_ALLOCATOR(CSSNamespaceRule);
CSSNamespaceRule::CSSNamespaceRule(JS::Realm& realm, Optional<FlyString> prefix, FlyString namespace_uri)
: CSSRule(realm)
, m_namespace_uri(move(namespace_uri))
, m_prefix(prefix.value_or(""_fly_string))
{
}
JS::NonnullGCPtr<CSSNamespaceRule> CSSNamespaceRule::create(JS::Realm& realm, Optional<FlyString> prefix, FlyString namespace_uri)
{
return realm.heap().allocate<CSSNamespaceRule>(realm, realm, move(prefix), move(namespace_uri));
}
void CSSNamespaceRule::initialize(JS::Realm& realm)
{
Base::initialize(realm);
WEB_SET_PROTOTYPE_FOR_INTERFACE(CSSNamespaceRule);
}
// https://www.w3.org/TR/cssom/#serialize-a-css-rule
String CSSNamespaceRule::serialized() const
{
StringBuilder builder;
// The literal string "@namespace", followed by a single SPACE (U+0020),
builder.append("@namespace "sv);
// followed by the serialization as an identifier of the prefix attribute (if any),
if (!m_prefix.is_empty()) {
serialize_an_identifier(builder, m_prefix);
// followed by a single SPACE (U+0020) if there is a prefix,
builder.append(" "sv);
}
// followed by the serialization as URL of the namespaceURI attribute,
serialize_a_url(builder, m_namespace_uri);
// followed the character ";" (U+003B).
builder.append(";"sv);
return MUST(builder.to_string());
}
}