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// Copyright 2023 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package langs contains the language related types and function.
package langs
import (
"fmt"
"sync"
"time"
"golang.org/x/text/collate"
"golang.org/x/text/language"
"github.com/gohugoio/hugo/common/htime"
"github.com/gohugoio/hugo/common/maps"
"github.com/gohugoio/locales"
translators "github.com/gohugoio/localescompressed"
)
type Language struct {
// The language code, e.g. "en" or "no".
// This is currently only settable as the key in the language map in the config.
Lang string
// Fields from the language config.
LanguageConfig
// Used for date formatting etc. We don't want these exported to the
// templates.
translator locales.Translator
timeFormatter htime.TimeFormatter
tag language.Tag
// collator1 and collator2 are the same, we have 2 to prevent deadlocks.
collator1 *Collator
collator2 *Collator
location *time.Location
// This is just an alias of Site.Params.
params maps.Params
}
// NewLanguage creates a new language.
func NewLanguage(lang, defaultContentLanguage, timeZone string, languageConfig LanguageConfig) (*Language, error) {
translator := translators.GetTranslator(lang)
if translator == nil {
translator = translators.GetTranslator(defaultContentLanguage)
if translator == nil {
translator = translators.GetTranslator("en")
}
}
var coll1, coll2 *Collator
tag, err := language.Parse(lang)
if err == nil {
coll1 = &Collator{
c: collate.New(tag),
}
coll2 = &Collator{
c: collate.New(tag),
}
} else {
coll1 = &Collator{
c: collate.New(language.English),
}
coll2 = &Collator{
c: collate.New(language.English),
}
}
l := &Language{
Lang: lang,
LanguageConfig: languageConfig,
translator: translator,
timeFormatter: htime.NewTimeFormatter(translator),
tag: tag,
collator1: coll1,
collator2: coll2,
}
return l, l.loadLocation(timeZone)
}
// This is injected from hugolib to avoid cirular dependencies.
var DeprecationFunc = func(item, alternative string, err bool) {}
const paramsDeprecationWarning = `.Language.Params is deprecated and will be removed in a future release. Use site.Params instead.
- For all but custom parameters, you need to use the built in Hugo variables, e.g. site.Title, site.LanguageCode; site.Language.Params.Title will not work.
- All custom parameters needs to be placed below params, e.g. [languages.en.params] in TOML.
See https://gohugo.io/content-management/multilingual/#changes-in-hugo-01120
`
// Params returns the language params.
// Note that this is the same as the Site.Params, but we keep it here for legacy reasons.
// Deprecated: Use the site.Params instead.
func (l *Language) Params() maps.Params {
// TODO(bep) Remove this for now as it created a little too much noise. Need to think about this.
// See https://github.com/gohugoio/hugo/issues/11025
//DeprecationFunc(".Language.Params", paramsDeprecationWarning, false)
return l.params
}
func (l *Language) LanguageCode() string {
if l.LanguageConfig.LanguageCode != "" {
return l.LanguageConfig.LanguageCode
}
return l.Lang
}
func (l *Language) loadLocation(tzStr string) error {
location, err := time.LoadLocation(tzStr)
if err != nil {
return fmt.Errorf("invalid timeZone for language %q: %w", l.Lang, err)
}
l.location = location
return nil
}
func (l *Language) String() string {
return l.Lang
}
// Languages is a sortable list of languages.
type Languages []*Language
func (l Languages) AsSet() map[string]bool {
m := make(map[string]bool)
for _, lang := range l {
m[lang.Lang] = true
}
return m
}
func (l Languages) AsOrdinalSet() map[string]int {
m := make(map[string]int)
for i, lang := range l {
m[lang.Lang] = i
}
return m
}
// Internal access to unexported Language fields.
// This construct is to prevent them from leaking to the templates.
func SetParams(l *Language, params maps.Params) {
l.params = params
}
func GetTimeFormatter(l *Language) htime.TimeFormatter {
return l.timeFormatter
}
func GetTranslator(l *Language) locales.Translator {
return l.translator
}
func GetLocation(l *Language) *time.Location {
return l.location
}
func GetCollator1(l *Language) *Collator {
return l.collator1
}
func GetCollator2(l *Language) *Collator {
return l.collator2
}
type Collator struct {
sync.Mutex
c *collate.Collator
}
// CompareStrings compares a and b.
// It returns -1 if a < b, 1 if a > b and 0 if a == b.
// Note that the Collator is not thread safe, so you may want
// to acquire a lock on it before calling this method.
func (c *Collator) CompareStrings(a, b string) int {
return c.c.CompareString(a, b)
}
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