Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: https://github.com/LadybirdBrowser/ladybird/commit/93712b24bf2
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibWeb/CSS/StyleValues/ScrollbarGutterStyleValue.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2024, the Ladybird developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/CSS/CSSStyleValue.h>
+
+namespace Web::CSS {
+
+class ScrollbarGutterStyleValue final : public StyleValueWithDefaultOperators<ScrollbarGutterStyleValue> {
+public:
+    static ValueComparingNonnullRefPtr<ScrollbarGutterStyleValue> create(ScrollbarGutter value)
+    {
+        return adopt_ref(*new (nothrow) ScrollbarGutterStyleValue(value));
+    }
+    virtual ~ScrollbarGutterStyleValue() override = default;
+
+    ScrollbarGutter value() const { return m_value; }
+
+    virtual String to_string() const override
+    {
+        switch (m_value) {
+        case ScrollbarGutter::Auto:
+            return "auto"_string;
+        case ScrollbarGutter::Stable:
+            return "stable"_string;
+        case ScrollbarGutter::BothEdges:
+            return "stable both-edges"_string;
+        default:
+            VERIFY_NOT_REACHED();
+        }
+    }
+
+    bool properties_equal(ScrollbarGutterStyleValue const& other) const { return m_value == other.m_value; }
+
+private:
+    ScrollbarGutterStyleValue(ScrollbarGutter value)
+        : StyleValueWithDefaultOperators(Type::ScrollbarGutter)
+        , m_value(value)
+    {
+    }
+
+    ScrollbarGutter m_value;
+};
+
+}