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

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

@@ -0,0 +1,56 @@
+/*
+ * 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 NumericStyleValue : public StyleValueWithDefaultOperators<NumericStyleValue> {
+public:
+    static ValueComparingNonnullRefPtr<NumericStyleValue> create_float(float value)
+    {
+        return adopt_ref(*new NumericStyleValue(value));
+    }
+
+    static ValueComparingNonnullRefPtr<NumericStyleValue> create_integer(i64 value)
+    {
+        return adopt_ref(*new NumericStyleValue(value));
+    }
+
+    virtual bool has_length() const override { return to_number() == 0; }
+    virtual Length to_length() const override { return Length::make_px(0); }
+
+    virtual bool has_number() const override { return true; }
+    virtual float to_number() const override
+    {
+        return m_value.visit(
+            [](float value) { return value; },
+            [](i64 value) { return (float)value; });
+    }
+
+    virtual bool has_integer() const override { return m_value.has<i64>(); }
+    virtual float to_integer() const override { return m_value.get<i64>(); }
+
+    virtual ErrorOr<String> to_string() const override;
+
+    bool properties_equal(NumericStyleValue const& other) const { return m_value == other.m_value; }
+
+private:
+    explicit NumericStyleValue(Variant<float, i64> value)
+        : StyleValueWithDefaultOperators(Type::Numeric)
+        , m_value(move(value))
+    {
+    }
+
+    Variant<float, i64> m_value { (i64)0 };
+};
+
+}