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-rw-r--r--modules/translation/translation.go303
1 files changed, 303 insertions, 0 deletions
diff --git a/modules/translation/translation.go b/modules/translation/translation.go
new file mode 100644
index 0000000..16eb55e
--- /dev/null
+++ b/modules/translation/translation.go
@@ -0,0 +1,303 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package translation
+
+import (
+ "context"
+ "html/template"
+ "sort"
+ "strings"
+ "sync"
+
+ "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"
+ "code.gitea.io/gitea/modules/util"
+
+ "github.com/dustin/go-humanize"
+ "golang.org/x/text/language"
+ "golang.org/x/text/message"
+ "golang.org/x/text/number"
+)
+
+type contextKey struct{}
+
+var ContextKey any = &contextKey{}
+
+// Locale represents an interface to translation
+type Locale interface {
+ Language() string
+ TrString(string, ...any) string
+
+ Tr(key string, args ...any) template.HTML
+ TrN(cnt any, key1, keyN string, args ...any) template.HTML
+
+ TrSize(size int64) ReadableSize
+
+ PrettyNumber(v any) 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 (
+ lock *sync.RWMutex
+
+ allLangs []*LangType
+ allLangMap map[string]*LangType
+
+ matcher language.Matcher
+ supportedTags []language.Tag
+)
+
+// AllLangs returns all supported languages sorted by name
+func AllLangs() []*LangType {
+ return allLangs
+}
+
+// InitLocales loads the locales
+func InitLocales(ctx context.Context) {
+ if lock != nil {
+ lock.Lock()
+ defer lock.Unlock()
+ } else if !setting.IsProd && lock == nil {
+ lock = &sync.RWMutex{}
+ }
+
+ refreshLocales := func() {
+ i18n.ResetDefaultLocales()
+ localeNames, err := options.AssetFS().ListFiles("locale", true)
+ if err != nil {
+ log.Fatal("Failed to list locale files: %v", err)
+ }
+
+ localeData := make(map[string][]byte, len(localeNames))
+ for _, name := range localeNames {
+ localeData[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 {
+ var localeDataBase []byte
+ if i == 0 && setting.Langs[0] != "en-US" {
+ // Only en-US has complete translations. When use other language as default, the en-US should still be used as fallback.
+ localeDataBase = localeData["locale_en-US.ini"]
+ if localeDataBase == nil {
+ log.Fatal("Failed to load locale_en-US.ini file.")
+ }
+ }
+
+ key := "locale_" + setting.Langs[i] + ".ini"
+ if err = i18n.DefaultLocales.AddLocaleByIni(setting.Langs[i], setting.Names[i], localeDataBase, localeData[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)
+ }
+ }
+
+ refreshLocales()
+
+ 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)
+ })
+
+ if !setting.IsProd {
+ go options.AssetFS().WatchLocalChanges(ctx, func() {
+ lock.Lock()
+ defer lock.Unlock()
+ refreshLocales()
+ })
+ }
+}
+
+// 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 {
+ i18n.Locale
+ Lang, LangName string // these fields are used directly in templates: ctx.Locale.Lang
+ msgPrinter *message.Printer
+}
+
+var _ Locale = (*locale)(nil)
+
+// NewLocale return a locale
+func NewLocale(lang string) Locale {
+ if lock != nil {
+ lock.RLock()
+ defer lock.RUnlock()
+ }
+
+ langName := "unknown"
+ if l, ok := allLangMap[lang]; ok {
+ langName = l.Name
+ } else if len(setting.Langs) > 0 {
+ lang = setting.Langs[0]
+ langName = setting.Names[0]
+ }
+
+ i18nLocale, _ := i18n.GetLocale(lang)
+ l := &locale{
+ Locale: i18nLocale,
+ Lang: lang,
+ LangName: langName,
+ }
+ if langTag, err := language.Parse(lang); err != nil {
+ log.Error("Failed to parse language tag from name %q: %v", l.Lang, err)
+ l.msgPrinter = message.NewPrinter(language.English)
+ } else {
+ l.msgPrinter = message.NewPrinter(langTag)
+ }
+ return l
+}
+
+func (l *locale) Language() string {
+ return l.Lang
+}
+
+// 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
+ },
+}
+
+func (l *locale) Tr(s string, args ...any) template.HTML {
+ return l.TrHTML(s, args...)
+}
+
+// TrN returns translated message for plural text translation
+func (l *locale) TrN(cnt any, key1, keyN string, args ...any) template.HTML {
+ 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...)
+}
+
+type ReadableSize struct {
+ PrettyNumber string
+ TranslatedUnit string
+}
+
+func (bs ReadableSize) String() string {
+ return bs.PrettyNumber + " " + bs.TranslatedUnit
+}
+
+// TrSize returns array containing pretty formatted size and localized output of FileSize
+// output of humanize.IBytes has to be split in order to be localized
+func (l *locale) TrSize(s int64) ReadableSize {
+ us := uint64(s)
+ if s < 0 {
+ us = uint64(-s)
+ }
+ untranslated := humanize.IBytes(us)
+ if s < 0 {
+ untranslated = "-" + untranslated
+ }
+ numberVal, unitVal, found := strings.Cut(untranslated, " ")
+ if !found {
+ log.Error("no space in go-humanized size of %d: %q", s, untranslated)
+ }
+ numberVal = l.PrettyNumber(numberVal)
+ unitVal = l.TrString("munits.data." + strings.ToLower(unitVal))
+ return ReadableSize{numberVal, unitVal}
+}
+
+func (l *locale) PrettyNumber(v any) string {
+ // TODO: this mechanism is not good enough, the complete solution is to switch the translation system to ICU message format
+ if s, ok := v.(string); ok {
+ if num, err := util.ToInt64(s); err == nil {
+ v = num
+ } else if num, err := util.ToFloat64(s); err == nil {
+ v = num
+ }
+ }
+ return l.msgPrinter.Sprintf("%v", number.Decimal(v))
+}
+
+func init() {
+ // prepare a default matcher, especially for tests
+ supportedTags = []language.Tag{language.English}
+ matcher = language.NewMatcher(supportedTags)
+}