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104 lines
2.9 KiB
Rust
104 lines
2.9 KiB
Rust
use rust_i18n::i18n;
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const DEFAULT_LANGUAGE: &str = "zh";
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i18n!("locales", fallback = "zh");
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#[inline]
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fn locale_alias(locale: &str) -> Option<&'static str> {
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match locale {
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"ja" | "ja-jp" | "jp" => Some("jp"),
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"zh" | "zh-cn" | "zh-hans" | "zh-sg" | "zh-my" | "zh-chs" => Some("zh"),
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"zh-tw" | "zh-hk" | "zh-hant" | "zh-mo" | "zh-cht" => Some("zhtw"),
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_ => None,
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}
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}
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#[inline]
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fn resolve_supported_language(language: &str) -> Option<&'static str> {
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if language.is_empty() {
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return None;
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}
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let normalized = language.to_lowercase().replace('_', "-");
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let segments: Vec<&str> = normalized.split('-').collect();
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let supported = rust_i18n::available_locales!();
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for i in (1..=segments.len()).rev() {
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let prefix = segments[..i].join("-");
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if let Some(alias) = locale_alias(&prefix)
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&& let Some(&found) = supported.iter().find(|&&l| l.eq_ignore_ascii_case(alias))
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{
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return Some(found);
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}
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if let Some(&found) = supported.iter().find(|&&l| l.eq_ignore_ascii_case(&prefix)) {
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return Some(found);
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}
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}
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None
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}
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#[inline]
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fn current_language(language: Option<&str>) -> &str {
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language
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.as_ref()
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.filter(|lang| !lang.is_empty())
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.and_then(|lang| resolve_supported_language(lang))
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.unwrap_or_else(system_language)
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}
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#[inline]
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pub fn system_language() -> &'static str {
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sys_locale::get_locale()
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.as_deref()
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.and_then(resolve_supported_language)
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.unwrap_or(DEFAULT_LANGUAGE)
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}
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#[inline]
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pub fn sync_locale(language: Option<&str>) {
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let language = current_language(language);
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set_locale(language);
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}
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#[inline]
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pub fn set_locale(language: &str) {
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let lang = resolve_supported_language(language).unwrap_or(DEFAULT_LANGUAGE);
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rust_i18n::set_locale(lang);
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}
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#[inline]
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pub fn translate(key: &str) -> Cow<'_, str> {
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rust_i18n::t!(key)
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}
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#[macro_export]
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macro_rules! t {
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($key:expr) => {
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$crate::translate(&$key)
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};
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($key:expr, $($arg_name:ident = $arg_value:expr),*) => {
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{
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let mut _text = $crate::translate(&$key);
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$(
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_text = _text.replace(&format!("{{{}}}", stringify!($arg_name)), &$arg_value);
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)*
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_text
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}
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};
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}
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#[cfg(test)]
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mod test {
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use super::resolve_supported_language;
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#[test]
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fn test_resolve_supported_language() {
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assert_eq!(resolve_supported_language("en"), Some("en"));
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assert_eq!(resolve_supported_language("en-US"), Some("en"));
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assert_eq!(resolve_supported_language("zh"), Some("zh"));
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assert_eq!(resolve_supported_language("zh-CN"), Some("zh"));
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assert_eq!(resolve_supported_language("zh-Hant"), Some("zhtw"));
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assert_eq!(resolve_supported_language("jp"), Some("jp"));
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assert_eq!(resolve_supported_language("ja-JP"), Some("jp"));
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assert_eq!(resolve_supported_language("fr"), None);
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}
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}
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