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// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package translation
import (
"sort"
"strings"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/options"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/translation/i18n"
"golang.org/x/text/language"
)
// Locale represents an interface to translation
type Locale interface {
Language() string
Tr(string, ...interface{}) string
TrN(cnt interface{}, key1, keyN string, args ...interface{}) string
}
// LangType represents a lang type
type LangType struct {
Lang, Name string // these fields are used directly in templates: {{range .AllLangs}}{{.Lang}}{{.Name}}{{end}}
}
var (
matcher language.Matcher
allLangs []*LangType
allLangMap map[string]*LangType
supportedTags []language.Tag
)
// AllLangs returns all supported languages sorted by name
func AllLangs() []*LangType {
return allLangs
}
// TryTr tries to do the translation, if no translation, it returns (format, false)
func TryTr(lang, format string, args ...interface{}) (string, bool) {
s := i18n.Tr(lang, format, args...)
// now the i18n library is not good enough and we can only use this hacky method to detect whether the transaction exists
idx := strings.IndexByte(format, '.')
defaultText := format
if idx > 0 {
defaultText = format[idx+1:]
}
return s, s != defaultText
}
// InitLocales loads the locales
func InitLocales() {
i18n.ResetDefaultLocales()
localeNames, err := options.Dir("locale")
if err != nil {
log.Fatal("Failed to list locale files: %v", err)
}
localFiles := make(map[string][]byte, len(localeNames))
for _, name := range localeNames {
localFiles[name], err = options.Locale(name)
if err != nil {
log.Fatal("Failed to load %s locale file. %v", name, err)
}
}
supportedTags = make([]language.Tag, len(setting.Langs))
for i, lang := range setting.Langs {
supportedTags[i] = language.Raw.Make(lang)
}
matcher = language.NewMatcher(supportedTags)
for i := range setting.Names {
key := "locale_" + setting.Langs[i] + ".ini"
if err = i18n.DefaultLocales.AddLocaleByIni(setting.Langs[i], setting.Names[i], localFiles[key]); err != nil {
log.Error("Failed to set messages to %s: %v", setting.Langs[i], err)
}
}
if len(setting.Langs) != 0 {
defaultLangName := setting.Langs[0]
if defaultLangName != "en-US" {
log.Info("Use the first locale (%s) in LANGS setting option as default", defaultLangName)
}
i18n.DefaultLocales.SetDefaultLang(defaultLangName)
}
langs, descs := i18n.DefaultLocales.ListLangNameDesc()
allLangs = make([]*LangType, 0, len(langs))
allLangMap = map[string]*LangType{}
for i, v := range langs {
l := &LangType{v, descs[i]}
allLangs = append(allLangs, l)
allLangMap[v] = l
}
// Sort languages case-insensitive according to their name - needed for the user settings
sort.Slice(allLangs, func(i, j int) bool {
return strings.ToLower(allLangs[i].Name) < strings.ToLower(allLangs[j].Name)
})
}
// Match matches accept languages
func Match(tags ...language.Tag) language.Tag {
_, i, _ := matcher.Match(tags...)
return supportedTags[i]
}
// locale represents the information of localization.
type locale struct {
Lang, LangName string // these fields are used directly in templates: .i18n.Lang
}
// NewLocale return a locale
func NewLocale(lang string) Locale {
langName := "unknown"
if l, ok := allLangMap[lang]; ok {
langName = l.Name
}
return &locale{
Lang: lang,
LangName: langName,
}
}
func (l *locale) Language() string {
return l.Lang
}
// Tr translates content to target language.
func (l *locale) Tr(format string, args ...interface{}) string {
if setting.IsProd {
return i18n.Tr(l.Lang, format, args...)
}
// in development, we should show an error if a translation key is missing
s, ok := TryTr(l.Lang, format, args...)
if !ok {
log.Error("missing i18n translation key: %q", format)
}
return s
}
// Language specific rules for translating plural texts
var trNLangRules = map[string]func(int64) int{
// the default rule is "en-US" if a language isn't listed here
"en-US": func(cnt int64) int {
if cnt == 1 {
return 0
}
return 1
},
"lv-LV": func(cnt int64) int {
if cnt%10 == 1 && cnt%100 != 11 {
return 0
}
return 1
},
"ru-RU": func(cnt int64) int {
if cnt%10 == 1 && cnt%100 != 11 {
return 0
}
return 1
},
"zh-CN": func(cnt int64) int {
return 0
},
"zh-HK": func(cnt int64) int {
return 0
},
"zh-TW": func(cnt int64) int {
return 0
},
"fr-FR": func(cnt int64) int {
if cnt > -2 && cnt < 2 {
return 0
}
return 1
},
}
// TrN returns translated message for plural text translation
func (l *locale) TrN(cnt interface{}, key1, keyN string, args ...interface{}) string {
var c int64
if t, ok := cnt.(int); ok {
c = int64(t)
} else if t, ok := cnt.(int16); ok {
c = int64(t)
} else if t, ok := cnt.(int32); ok {
c = int64(t)
} else if t, ok := cnt.(int64); ok {
c = t
} else {
return l.Tr(keyN, args...)
}
ruleFunc, ok := trNLangRules[l.Lang]
if !ok {
ruleFunc = trNLangRules["en-US"]
}
if ruleFunc(c) == 0 {
return l.Tr(key1, args...)
}
return l.Tr(keyN, args...)
}
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