Add i18n localisation support

Author: bailuk

src/main/kotlin/config/I18n.kt

@@ -0,0 +1,29 @@
+package config
+
+import java.time.LocalDate
+import java.time.format.TextStyle
+import java.util.Locale
+import java.util.MissingResourceException
+import java.util.ResourceBundle
+
+object I18n {
+    private val locale = Locale.getDefault()
+    private val res = ResourceBundle.getBundle("i18n.strings", locale)
+
+
+    fun getString(key: Keys): String {
+        return getString(key.name.lowercase())
+    }
+
+    fun getString(name: String): String {
+        return try {
+            res.getString(name)
+        } catch (e: MissingResourceException) {
+            "-"
+        }
+    }
+
+    fun getDayOfWeek(date: LocalDate): String {
+        return date.dayOfWeek.getDisplayName(TextStyle.SHORT, locale)
+    }
+}

src/main/kotlin/config/Strings.kt

@@ -19,11 +19,6 @@ object Strings {
 
     val website = Str("https://github.com/bailuk/gtk-meteo")
 
-    // UX
-    const val CLOSE = "Close"
-    const val INFO = "Info…"
-    const val AUTO_CENTER = "Center map when changing place"
-
     // CSS
     val linked = Str("linked")
     val mapCenter = Str("map-center")

src/main/kotlin/model/DayModel.kt

@@ -1,10 +1,9 @@
 package model
 
+import config.I18n
 import lib.json.JsonMap
 import java.time.LocalDate
 import java.time.ZonedDateTime
-import java.time.format.TextStyle
-import java.util.*
 import kotlin.collections.ArrayList
 
 class DayModel(dateTime: ZonedDateTime) {
@@ -15,7 +14,7 @@ class DayModel(dateTime: ZonedDateTime) {
     var tempMax = -10000.0
 
     var symbol = ""
-    val weekDay: String = date.dayOfWeek.getDisplayName(TextStyle.SHORT, Locale.ENGLISH)
+    val weekDay: String = I18n.getDayOfWeek(date)
 
     private val samples = ArrayList<Sample>()
 

src/main/kotlin/view/About.kt

@@ -1,7 +1,11 @@
 package view
 
-import ch.bailu.gtk.gtk.*
+import ch.bailu.gtk.gtk.AboutDialog
+import ch.bailu.gtk.gtk.Button
+import ch.bailu.gtk.gtk.HeaderBar
+import ch.bailu.gtk.gtk.License
 import ch.bailu.gtk.gtk.Window
+import config.I18n
 import config.Strings
 import lib.icons.IconMap
 
@@ -17,15 +21,15 @@ object About {
             titlebar = createHeaderBar(this)
             transientFor = window
             modal = true
-            show()
+            present()
         }
     }
 
     private fun createHeaderBar(aboutDialog: AboutDialog): HeaderBar {
         return HeaderBar().apply {
              showTitleButtons = false
              packEnd(Button().apply {
-                 setLabel(Strings.CLOSE)
+                 setLabel(I18n.getString("close"))
                  onClicked {
                      aboutDialog.close()
                  }

src/main/kotlin/view/MainMenu.kt

@@ -6,10 +6,10 @@ import ch.bailu.gtk.gtk.MenuButton
 import ch.bailu.gtk.lib.handler.action.ActionHandler
 import ch.bailu.gtk.type.Str
 import config.Keys
-import config.Strings
 import controller.Controller
 import lib.extension.ellipsize
 import model.Model
+import config.I18n
 
 class MainMenu(app: Application) {
     private var places = ArrayList<String>()
@@ -33,8 +33,8 @@ class MainMenu(app: Application) {
                         }
                     })
                     appendSection(Str.NULL, Menu().apply {
-                        append(Strings.AUTO_CENTER, "app.${Keys.AUTO_CYCLE}")
-                        append(Strings.INFO, "app.${Keys.ABOUT}")
+                        append(I18n.getString(Keys.AUTO_CYCLE), "app.${Keys.AUTO_CYCLE}")
+                        append(I18n.getString(Keys.ABOUT), "app.${Keys.ABOUT}")
                     })
                 }
             }

src/main/resources/i18n/strings.properties

@@ -0,0 +1,3 @@
+close=Close
+about=Info…
+auto_cycle=Center map when changing place

src/main/resources/i18n/strings_de.properties

@@ -0,0 +1,2 @@
+close=Schliessen
+auto_center=Karte zentrieren bei Ortwechsel