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189d1e8291
This removes a performance problem where we'd convert the style sheet's default namespace from DeprecatedFlyString to FlyString once per rule during selector matching. The conversion now happens once, during CSS parse. It should eventually be removed from there as well, but one step at a time. :^)
60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
/*
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* Copyright (c) 2023, Jonah Shafran <jonahshafran@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Heap/Heap.h>
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#include <LibJS/Runtime/Realm.h>
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#include <LibWeb/Bindings/CSSNamespaceRulePrototype.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/CSS/CSSNamespaceRule.h>
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#include <LibWeb/CSS/Serialize.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::CSS {
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JS_DEFINE_ALLOCATOR(CSSNamespaceRule);
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CSSNamespaceRule::CSSNamespaceRule(JS::Realm& realm, Optional<FlyString> prefix, FlyString namespace_uri)
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: CSSRule(realm)
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, m_namespace_uri(move(namespace_uri))
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, m_prefix(prefix.value_or(""_fly_string))
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{
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}
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JS::NonnullGCPtr<CSSNamespaceRule> CSSNamespaceRule::create(JS::Realm& realm, Optional<FlyString> prefix, FlyString namespace_uri)
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{
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return realm.heap().allocate<CSSNamespaceRule>(realm, realm, move(prefix), move(namespace_uri));
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}
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void CSSNamespaceRule::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::CSSNamespaceRulePrototype>(realm, "CSSNamespaceRule"_fly_string));
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}
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// https://www.w3.org/TR/cssom/#serialize-a-css-rule
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String CSSNamespaceRule::serialized() const
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{
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StringBuilder builder;
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// The literal string "@namespace", followed by a single SPACE (U+0020),
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builder.append("@namespace "sv);
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// followed by the serialization as an identifier of the prefix attribute (if any),
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if (!m_prefix.is_empty()) {
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serialize_an_identifier(builder, m_prefix);
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// followed by a single SPACE (U+0020) if there is a prefix,
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builder.append(" "sv);
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}
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// followed by the serialization as URL of the namespaceURI attribute,
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serialize_a_url(builder, m_namespace_uri);
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// followed the character ";" (U+003B).
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builder.append(";"sv);
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return MUST(builder.to_string());
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}
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}
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