1f9321b34b
- CurrentLanguage() now returns "en-GB" (fallback) instead of "" when service is nil, consistent with other getters returning defaults - Document why SetLanguage returns error (validates language tag) while SetMode, SetFormality, SetDebug do not (just set values) - Add "Does nothing if service not initialized" to Set* doc comments Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
66 lines
1.4 KiB
Go
66 lines
1.4 KiB
Go
// Package i18n provides internationalization for the CLI.
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package i18n
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import (
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"os"
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"strings"
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"golang.org/x/text/language"
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)
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// SetFormality sets the default formality level on the default service.
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// Does nothing if the service is not initialized.
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//
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// SetFormality(FormalityFormal) // Use formal address (Sie, vous)
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func SetFormality(f Formality) {
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if svc := Default(); svc != nil {
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svc.SetFormality(f)
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}
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}
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// Direction returns the text direction for the current language.
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func Direction() TextDirection {
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if svc := Default(); svc != nil {
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return svc.Direction()
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}
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return DirLTR
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}
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// IsRTL returns true if the current language uses right-to-left text.
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func IsRTL() bool {
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return Direction() == DirRTL
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}
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func detectLanguage(supported []language.Tag) string {
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langEnv := os.Getenv("LANG")
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if langEnv == "" {
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langEnv = os.Getenv("LC_ALL")
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if langEnv == "" {
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langEnv = os.Getenv("LC_MESSAGES")
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}
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}
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if langEnv == "" {
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return ""
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}
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// Parse LANG format: en_GB.UTF-8 -> en-GB
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baseLang := strings.Split(langEnv, ".")[0]
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baseLang = strings.ReplaceAll(baseLang, "_", "-")
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parsedLang, err := language.Parse(baseLang)
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if err != nil {
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return ""
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}
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if len(supported) == 0 {
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return ""
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}
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matcher := language.NewMatcher(supported)
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bestMatch, _, confidence := matcher.Match(parsedLang)
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if confidence >= language.Low {
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return bestMatch.String()
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}
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return ""
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}
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