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osu-lazer/osu.Game/Extensions/LanguageExtensions.cs

72 lines
3.0 KiB
C#

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using System.Globalization;
using osu.Framework.Configuration;
using osu.Framework.Localisation;
using osu.Game.Localisation;
namespace osu.Game.Extensions
{
/// <summary>
/// Conversion utilities for the <see cref="Language"/> enum.
/// </summary>
public static class LanguageExtensions
{
/// <summary>
/// Returns the culture code of the <see cref="CultureInfo"/> that corresponds to the supplied <paramref name="language"/>.
/// </summary>
/// <remarks>
/// This is required as enum member names are not allowed to contain hyphens.
/// </remarks>
public static string ToCultureCode(this Language language)
{
if (language == Language.zh_hant)
return @"zh-tw";
return language.ToString().Replace("_", "-");
}
/// <summary>
/// Attempts to parse the supplied <paramref name="cultureCode"/> to a <see cref="Language"/> value.
/// </summary>
/// <param name="cultureCode">The code of the culture to parse.</param>
/// <param name="language">The parsed <see cref="Language"/>. Valid only if the return value of the method is <see langword="true" />.</param>
/// <returns>Whether the parsing succeeded.</returns>
public static bool TryParseCultureCode(string cultureCode, out Language language)
{
if (cultureCode == @"zh-tw")
{
language = Language.zh_hant;
return true;
}
return Enum.TryParse(cultureCode.Replace("-", "_"), out language);
}
/// <summary>
/// Parses the <see cref="Language"/> that is specified in <paramref name="frameworkLocale"/>,
/// or if that is not valid, the language of the current <see cref="ResourceManagerLocalisationStore"/> as exposed by <paramref name="localisationParameters"/>.
/// </summary>
/// <param name="frameworkLocale">The current <see cref="FrameworkSetting.Locale"/>.</param>
/// <param name="localisationParameters">The current <see cref="LocalisationParameters"/> of the <see cref="LocalisationManager"/>.</param>
/// <returns>The parsed language.</returns>
public static Language GetLanguageFor(string frameworkLocale, LocalisationParameters localisationParameters)
{
// the usual case when the user has changed the language
if (TryParseCultureCode(frameworkLocale, out var language))
return language;
if (localisationParameters.Store != null)
{
// startup case, locale not explicitly set, or the set language was removed in an update
if (TryParseCultureCode(localisationParameters.Store.EffectiveCulture.Name, out language))
return language;
}
return Language.en;
}
}
}