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Introduce preferredLocales API #1315

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merged 1 commit into from
May 23, 2025
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Introduce preferredLocales API #1315

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11 changes: 10 additions & 1 deletion Sources/FoundationEssentials/Locale/Locale.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -554,15 +554,24 @@ public struct Locale : Hashable, Equatable, Sendable {
// MARK: -
//

/// Returns a list of the user's preferred languages.
/// Returns a list of the user's preferred languages, as specified in Language & Region settings, taking into account any per-app language overrides.
///
/// - note: `Bundle` is responsible for determining the language that your application will run in, based on the result of this API and combined with the languages your application supports.
/// - seealso: `Bundle.preferredLocalizations(from:)`
/// - seealso: `Bundle.preferredLocalizations(from:forPreferences:)`
/// - seealso: `Locale.preferredLocales`
public static var preferredLanguages: [String] {
LocaleCache.cache.preferredLanguages(forCurrentUser: false)
}

/// Returns a list of the user’s preferred locales, as specified in Language & Region settings, taking into account any per-app language overrides.
@available(FoundationPreview 6.2, *)
public static var preferredLocales: [Locale] {
return self.preferredLanguages.compactMap {
Locale(identifier: $0)
}
}

private static let languageCodeKey = "kCFLocaleLanguageCodeKey"
private static let scriptCodeKey = "kCFLocaleScriptCodeKey"
private static let countryCodeKey = "kCFLocaleCountryCodeKey"
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