LibWeb: Split UnsetStyleValue out of StyleValue.{h,cpp}

Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp

@@ -68,6 +68,7 @@
 #include <LibWeb/CSS/StyleValues/TimeStyleValue.h>
 #include <LibWeb/CSS/StyleValues/TransformationStyleValue.h>
 #include <LibWeb/CSS/StyleValues/UnresolvedStyleValue.h>
+#include <LibWeb/CSS/StyleValues/UnsetStyleValue.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/Dump.h>
 #include <LibWeb/Infra/Strings.h>

Userland/Libraries/LibWeb/CSS/StyleValue.cpp

@@ -51,6 +51,7 @@
 #include <LibWeb/CSS/StyleValues/TimeStyleValue.h>
 #include <LibWeb/CSS/StyleValues/TransformationStyleValue.h>
 #include <LibWeb/CSS/StyleValues/UnresolvedStyleValue.h>
+#include <LibWeb/CSS/StyleValues/UnsetStyleValue.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/HTML/BrowsingContext.h>
 #include <LibWeb/Loader/LoadRequest.h>

Userland/Libraries/LibWeb/CSS/StyleValue.h

@@ -622,26 +622,6 @@ private:
     NonnullOwnPtr<CalcSum> m_expression;
 };
 
-class UnsetStyleValue final : public StyleValueWithDefaultOperators<UnsetStyleValue> {
-public:
-    static ValueComparingNonnullRefPtr<UnsetStyleValue> the()
-    {
-        static ValueComparingNonnullRefPtr<UnsetStyleValue> instance = adopt_ref(*new UnsetStyleValue);
-        return instance;
-    }
-    virtual ~UnsetStyleValue() override = default;
-
-    ErrorOr<String> to_string() const override { return "unset"_string; }
-
-    bool properties_equal(UnsetStyleValue const&) const { return true; }
-
-private:
-    UnsetStyleValue()
-        : StyleValueWithDefaultOperators(Type::Unset)
-    {
-    }
-};
-
 class StyleValueList final : public StyleValueWithDefaultOperators<StyleValueList> {
 public:
     enum class Separator {

Userland/Libraries/LibWeb/CSS/StyleValues/UnsetStyleValue.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
+ * Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
+ * Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/CSS/StyleValue.h>
+
+namespace Web::CSS {
+
+class UnsetStyleValue final : public StyleValueWithDefaultOperators<UnsetStyleValue> {
+public:
+    static ValueComparingNonnullRefPtr<UnsetStyleValue> the()
+    {
+        static ValueComparingNonnullRefPtr<UnsetStyleValue> instance = adopt_ref(*new UnsetStyleValue);
+        return instance;
+    }
+    virtual ~UnsetStyleValue() override = default;
+
+    ErrorOr<String> to_string() const override { return "unset"_string; }
+
+    bool properties_equal(UnsetStyleValue const&) const { return true; }
+
+private:
+    UnsetStyleValue()
+        : StyleValueWithDefaultOperators(Type::Unset)
+    {
+    }
+};
+
+}