LibWeb: Parse view() for the animation-timeline CSS property

Author: https://github.com/Calme1709
Commit: c8d91c127e
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6912
Reviewed-by: https://github.com/AtkinsSJ ✅

Libraries/LibWeb/CSS/StyleValues/ViewFunctionStyleValue.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2025, Callum Law <callumlaw1709@outlook.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/CSS/Enums.h>
+#include <LibWeb/CSS/StyleValues/StyleValue.h>
+
+namespace Web::CSS {
+
+class ViewFunctionStyleValue final : public StyleValueWithDefaultOperators<ViewFunctionStyleValue> {
+public:
+    static ValueComparingNonnullRefPtr<ViewFunctionStyleValue const> create(Axis axis, NonnullRefPtr<StyleValue const> inset)
+    {
+        return adopt_ref(*new ViewFunctionStyleValue(axis, move(inset)));
+    }
+    virtual ~ViewFunctionStyleValue() override = default;
+
+    virtual String to_string(SerializationMode) const override;
+    bool properties_equal(ViewFunctionStyleValue const& other) const { return m_axis == other.m_axis && m_inset == other.m_inset; }
+    virtual ValueComparingNonnullRefPtr<StyleValue const> absolutized(ComputationContext const&) const override;
+
+    Axis axis() const { return m_axis; }
+    NonnullRefPtr<StyleValue const> inset() const { return m_inset; }
+
+private:
+    explicit ViewFunctionStyleValue(Axis axis, NonnullRefPtr<StyleValue const> inset)
+        : StyleValueWithDefaultOperators(Type::ViewFunction)
+        , m_axis(axis)
+        , m_inset(move(inset))
+    {
+    }
+
+    Axis m_axis;
+    ValueComparingNonnullRefPtr<StyleValue const> m_inset;
+};
+
+}