ladybird/Libraries/LibWeb/CSS/CSSPropertyRule.cpp
Sam Atkins c57975c9fd LibWeb: Move and rename CSSStyleValue to StyleValues/StyleValue.{h,cpp}
This reverts 0e3487b9ab.

Back when I made that change, I thought we could make our StyleValue
classes match the typed-om definitions directly. However, they have
different requirements. Typed-om types need to be mutable and GCed,
whereas StyleValues are immutable and ideally wouldn't require a JS VM.

While I was already making such a cataclysmic change, I've moved it into
the StyleValues directory, because it *not* being there has bothered me
for a long time. 😅
2025-08-08 15:19:03 +01:00

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/*
* Copyright (c) 2024, Alex Ungurianu <alex@ungurianu.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Bindings/CSSPropertyRulePrototype.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/CSS/CSSPropertyRule.h>
#include <LibWeb/CSS/Serialize.h>
namespace Web::CSS {
GC_DEFINE_ALLOCATOR(CSSPropertyRule);
GC::Ref<CSSPropertyRule> CSSPropertyRule::create(JS::Realm& realm, FlyString name, FlyString syntax, bool inherits, RefPtr<StyleValue const> initial_value)
{
return realm.create<CSSPropertyRule>(realm, move(name), move(syntax), inherits, move(initial_value));
}
CSSPropertyRule::CSSPropertyRule(JS::Realm& realm, FlyString name, FlyString syntax, bool inherits, RefPtr<StyleValue const> initial_value)
: CSSRule(realm, Type::Property)
, m_name(move(name))
, m_syntax(move(syntax))
, m_inherits(inherits)
, m_initial_value(move(initial_value))
{
}
Optional<String> CSSPropertyRule::initial_value() const
{
if (m_initial_value)
return m_initial_value->to_string(SerializationMode::Normal);
return {};
}
void CSSPropertyRule::initialize(JS::Realm& realm)
{
WEB_SET_PROTOTYPE_FOR_INTERFACE(CSSPropertyRule);
Base::initialize(realm);
}
// https://www.w3.org/TR/cssom-1/#serialize-a-css-rule
String CSSPropertyRule::serialized() const
{
StringBuilder builder;
// Serialization algorithm is defined in the spec below
// https://drafts.css-houdini.org/css-properties-values-api/#the-css-property-rule-interface
// To serialize a CSSPropertyRule, return the concatenation of the following:
// 1. The string "@property" followed by a single SPACE (U+0020).
// 2. The result of performing serialize an identifier on the rule’s name, followed by a single SPACE (U+0020).
builder.appendff("@property {} ", serialize_an_identifier(name()));
// 3. The string "{ ", i.e., a single LEFT CURLY BRACKET (U+007B), followed by a SPACE (U+0020).
builder.append("{ "sv);
// 4. The string "syntax:", followed by a single SPACE (U+0020).
// 5. The result of performing serialize a string on the rule’s syntax, followed by a single SEMICOLON (U+003B), followed by a SPACE (U+0020).
builder.appendff("syntax: {}; ", serialize_a_string(syntax()));
// 6. The string "inherits:", followed by a single SPACE (U+0020).
// 7. For the rule’s inherits attribute, one of the following depending on the attribute’s value:
// true: The string "true" followed by a single SEMICOLON (U+003B), followed by a SPACE (U+0020).
// false: The string "false" followed by a single SEMICOLON (U+003B), followed by a SPACE (U+0020).
builder.appendff("inherits: {}; ", inherits());
// 8. If the rule’s initial-value is present, follow these substeps:
if (initial_value().has_value()) {
// 1. The string "initial-value:".
// 2. The result of performing serialize a CSS value in the rule’s initial-value followed by a single SEMICOLON
// (U+003B), followed by a SPACE (U+0020).
builder.appendff("initial-value: {}; ", initial_value());
}
// 9. A single RIGHT CURLY BRACKET (U+007D).
builder.append("}"sv);
return MUST(builder.to_string());
}
}