Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibWeb/CSS/Frequency.cpp

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2022-2023, Sam Atkins <atkinssj@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "Frequency.h"
+#include <LibWeb/CSS/Percentage.h>
+#include <LibWeb/CSS/StyleValues/CSSMathValue.h>
+
+namespace Web::CSS {
+
+Frequency::Frequency(double value, Type type)
+    : m_type(type)
+    , m_value(value)
+{
+}
+
+Frequency Frequency::make_hertz(double value)
+{
+    return { value, Type::Hz };
+}
+
+Frequency Frequency::percentage_of(Percentage const& percentage) const
+{
+    return Frequency { percentage.as_fraction() * m_value, m_type };
+}
+
+String Frequency::to_string() const
+{
+    return MUST(String::formatted("{}hz", to_hertz()));
+}
+
+double Frequency::to_hertz() const
+{
+    switch (m_type) {
+    case Type::Hz:
+        return m_value;
+    case Type::kHz:
+        return m_value * 1000;
+    }
+    VERIFY_NOT_REACHED();
+}
+
+StringView Frequency::unit_name() const
+{
+    switch (m_type) {
+    case Type::Hz:
+        return "hz"sv;
+    case Type::kHz:
+        return "khz"sv;
+    }
+    VERIFY_NOT_REACHED();
+}
+
+Optional<Frequency::Type> Frequency::unit_from_name(StringView name)
+{
+    if (name.equals_ignoring_ascii_case("hz"sv)) {
+        return Type::Hz;
+    } else if (name.equals_ignoring_ascii_case("khz"sv)) {
+        return Type::kHz;
+    }
+    return {};
+}
+
+Frequency Frequency::resolve_calculated(NonnullRefPtr<CSSMathValue> const& calculated, Layout::Node const&, Frequency const& reference_value)
+{
+    return calculated->resolve_frequency_percentage(reference_value).value();
+}
+
+}