LibWeb: Implement CSSNestedDeclarations type

This is basically a list of properties, without a block around it. It'll be part of CSSStyleRules' contents.
Author: https://github.com/AtkinsSJ Commit: 9c66ab356a Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1842 Reviewed-by: https://github.com/awesomekling
2025-08-09 09:39:39 +00:00 · 2024-10-15 15:59:31 +01:00 · 2024-10-15 15:59:31 +01:00 · 9c66ab356a · 2024-10-17 18:57:40 +00:00
commit 9c66ab356a
parent 5b4d1b5b05
13 changed files with 155 additions and 26 deletions
--- a/Userland/Libraries/LibWeb/CSS/CSSNestedDeclarations.cpp
+++ b/Userland/Libraries/LibWeb/CSS/CSSNestedDeclarations.cpp
@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2024, Sam Atkins <sam@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "CSSNestedDeclarations.h"
+#include <LibWeb/Bindings/CSSNestedDeclarationsPrototype.h>
+#include <LibWeb/Bindings/Intrinsics.h>
+
+namespace Web::CSS {
+
+JS_DEFINE_ALLOCATOR(CSSNestedDeclarations);
+
+JS::NonnullGCPtr<CSSNestedDeclarations> CSSNestedDeclarations::create(JS::Realm& realm, PropertyOwningCSSStyleDeclaration& declaration)
+{
+    return realm.heap().allocate<CSSNestedDeclarations>(realm, realm, declaration);
+}
+
+CSSNestedDeclarations::CSSNestedDeclarations(JS::Realm& realm, PropertyOwningCSSStyleDeclaration& declaration)
+    : CSSRule(realm)
+    , m_declaration(declaration)
+{
+    m_declaration->set_parent_rule(*this);
+}
+
+void CSSNestedDeclarations::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(CSSNestedDeclarations);
+}
+
+void CSSNestedDeclarations::visit_edges(Cell::Visitor& visitor)
+{
+    Base::visit_edges(visitor);
+    visitor.visit(m_declaration);
+}
+
+CSSStyleDeclaration* CSSNestedDeclarations::style()
+{
+    return m_declaration;
+}
+
+String CSSNestedDeclarations::serialized() const
+{
+    // NOTE: There's no proper spec for this yet, only this note:
+    // "The CSSNestedDeclarations rule serializes as if its declaration block had been serialized directly."
+    // - https://drafts.csswg.org/css-nesting-1/#ref-for-cssnesteddeclarations%E2%91%A1
+    // So, we'll do the simple thing and hope it's good.
+    return m_declaration->serialized();
+}
+
+}