147 lines
4.2 KiB
Kotlin
147 lines
4.2 KiB
Kotlin
package eu.kanade.tachiyomi.util
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import android.app.Application
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import android.content.Context
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import android.content.res.Configuration
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import android.os.Build
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import android.os.LocaleList
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import android.view.ContextThemeWrapper
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import eu.kanade.tachiyomi.R
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import eu.kanade.tachiyomi.data.preference.PreferencesHelper
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import uy.kohesive.injekt.injectLazy
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import java.util.Locale
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/**
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* Utility class to change the application's language in runtime.
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*/
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@Suppress("DEPRECATION")
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object LocaleHelper {
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/**
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* Preferences helper.
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*/
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private val preferences: PreferencesHelper by injectLazy()
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/**
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* The system's locale.
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*/
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private var systemLocale: Locale? = null
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/**
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* The application's locale. When it's null, the system locale is used.
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*/
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private var appLocale = getLocaleFromString(preferences.lang())
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/**
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* The currently applied locale. Used to avoid losing the selected language after a non locale
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* configuration change to the application.
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*/
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private var currentLocale: Locale? = null
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/**
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* Returns the locale for the value stored in preferences, or null if it's system language.
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*
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* @param pref the string value stored in preferences.
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*/
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fun getLocaleFromString(pref: String): Locale? {
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if (pref.isNullOrEmpty()) {
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return null
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}
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return getLocale(pref)
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}
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/**
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* Returns Display name of a string language code
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*/
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fun getDisplayName(lang: String?, context: Context): String {
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return when (lang) {
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null -> ""
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"" -> context.getString(R.string.other_source)
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"all" -> context.getString(R.string.all_lang)
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else -> {
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val locale = getLocale(lang)
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locale.getDisplayName(locale).capitalize()
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}
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}
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}
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/*Return Locale from string language code
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*/
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private fun getLocale(lang: String): Locale {
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val sp = lang.split("_", "-")
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return when (sp.size) {
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2 -> Locale(sp[0], sp[1])
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3 -> Locale(sp[0], sp[1], sp[2])
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else -> Locale(lang)
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}
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}
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/**
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* Changes the application's locale with a new preference.
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*
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* @param pref the new value stored in preferences.
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*/
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fun changeLocale(pref: String) {
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appLocale = getLocaleFromString(pref)
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}
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/**
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* Updates the app's language to an activity.
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*/
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fun updateConfiguration(wrapper: ContextThemeWrapper) {
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if (appLocale != null) {
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val config = Configuration(preferences.context.resources.configuration)
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config.setLocale(appLocale)
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wrapper.applyOverrideConfiguration(config)
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}
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}
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/**
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* Updates the app's language to the application.
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*/
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fun updateConfiguration(app: Application, config: Configuration, configChange: Boolean = false) {
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if (systemLocale == null) {
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systemLocale = getConfigLocale(config)
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}
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if (configChange) {
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val configLocale = getConfigLocale(config)
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if (currentLocale == configLocale) {
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return
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}
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systemLocale = configLocale
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}
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currentLocale = appLocale ?: systemLocale ?: Locale.getDefault()
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val newConfig = updateConfigLocale(config, currentLocale!!)
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val resources = app.resources
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resources.updateConfiguration(newConfig, resources.displayMetrics)
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Locale.setDefault(currentLocale)
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}
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/**
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* Returns the locale applied in the given configuration.
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*/
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private fun getConfigLocale(config: Configuration): Locale {
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return if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
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config.locale
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} else {
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config.locales[0]
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}
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}
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/**
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* Returns a new configuration with the given locale applied.
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*/
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private fun updateConfigLocale(config: Configuration, locale: Locale): Configuration {
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val newConfig = Configuration(config)
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if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
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newConfig.locale = locale
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} else {
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newConfig.locales = LocaleList(locale)
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}
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return newConfig
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}
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}
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