LibWeb: Move/rename StyleFunctionRule to Parser::Function

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

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2020-2021, the SerenityOS developers.
+ * Copyright (c) 2021-2022, Sam Atkins <atkinssj@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/CSS/Parser/Function.h>
+#include <LibWeb/CSS/Serialize.h>
+
+namespace Web::CSS::Parser {
+
+Function::Function(String name)
+    : m_name(move(name))
+{
+}
+
+Function::Function(String name, Vector<ComponentValue>&& values)
+    : m_name(move(name))
+    , m_values(move(values))
+{
+}
+
+Function::~Function() = default;
+
+String Function::to_string() const
+{
+    StringBuilder builder;
+
+    serialize_an_identifier(builder, m_name);
+    builder.append("(");
+    builder.join(" ", m_values);
+    builder.append(")");
+
+    return builder.to_string();
+}
+
+}