From c64896b61f20fd9f103b3beef015e710409af1bf Mon Sep 17 00:00:00 2001
From: Peter Osterlund <peterosterlund2@gmail.com>
Date: Sun, 25 Feb 2018 08:47:34 +0100
Subject: [PATCH] DroidFish: Allow setting user interface language.

Made it possible to change the user interface language to be different
from the Android system default language.
---
 DroidFish/res/values/strings.xml              | 35 +++++++++++++++++++
 DroidFish/res/xml/preferences.xml             |  8 +++++
 .../src/org/petero/droidfish/DroidFish.java   | 19 ++++++++++
 3 files changed, 62 insertions(+)

diff --git a/DroidFish/res/values/strings.xml b/DroidFish/res/values/strings.xml
index 9f2dbbd..756f032 100644
--- a/DroidFish/res/values/strings.xml
+++ b/DroidFish/res/values/strings.xml
@@ -6,6 +6,7 @@
     <string name="time_control_default">120000</string>
     <string name="time_increment_default">0</string>
     <string name="squareSelectType_default">1</string>
+    <string name="language_default">default</string>
     <string name="font_size_default">12</string>
     <string name="thinking_arrows_default">4</string>
     <string name="scroll_sensitivity_default">2</string>
@@ -324,6 +325,8 @@ you are not actively using the program.\
     <string name="prefs_leftHanded_summary">Controls on left side in landscape mode</string>
     <string name="prefs_squareSelectType_title">Square selection</string>
     <string name="prefs_squareSelectType_summary">Control how selecting squares on the chess board behaves</string>
+    <string name="prefs_language_title">Language</string>
+    <string name="prefs_language_summary">User interface language</string>
     <string name="prefs_fontSize_title">Text Size</string>
     <string name="prefs_fontSize_summary">Font size for move list and game information</string>
     <string name="prefs_largeButtons_title">Large Buttons</string>
@@ -593,6 +596,38 @@ you are not actively using the program.\
         <item>0</item>
         <item>1</item>
     </string-array>
+    <string-array name="language_texts">
+        <item>System default</item>
+        <item>English</item>
+        <item>Belarusian</item>
+        <item>German</item>
+        <item>Spanish</item>
+        <item>French</item>
+        <item>Italian</item>
+        <item>Korean</item>
+        <item>Dutch</item>
+        <item>Polish</item>
+        <item>Portuguese</item>
+        <item>Russian</item>
+        <item>Turkish</item>
+        <item>Ukrainian</item>
+    </string-array>
+    <string-array name="language_values">
+        <item>default</item>
+        <item>en</item>
+        <item>be</item>
+        <item>de</item>
+        <item>es</item>
+        <item>fr</item>
+        <item>it</item>
+        <item>ko</item>
+        <item>nl</item>
+        <item>pl</item>
+        <item>pt</item>
+        <item>ru</item>
+        <item>tr</item>
+        <item>uk</item>
+        </string-array>
     <string-array name="font_size_texts">
         <item>Small</item>
         <item>Medium</item>
diff --git a/DroidFish/res/xml/preferences.xml b/DroidFish/res/xml/preferences.xml
index 806583f..8ca5de6 100644
--- a/DroidFish/res/xml/preferences.xml
+++ b/DroidFish/res/xml/preferences.xml
@@ -129,6 +129,14 @@
             android:summary="@string/prefs_fullScreenMode_summary" 
             android:defaultValue="false">
         </CheckBoxPreference>
+        <ListPreference
+            android:key="language"
+            android:title="@string/prefs_language_title"
+            android:summary="@string/prefs_language_summary"
+            android:entryValues="@array/language_values"
+            android:entries="@array/language_texts"
+            android:defaultValue="@string/language_default">
+        </ListPreference>
         <ListPreference
             android:key="fontSize"
             android:title="@string/prefs_fontSize_title" 
diff --git a/DroidFish/src/org/petero/droidfish/DroidFish.java b/DroidFish/src/org/petero/droidfish/DroidFish.java
index ec0c2b1..b3493e4 100644
--- a/DroidFish/src/org/petero/droidfish/DroidFish.java
+++ b/DroidFish/src/org/petero/droidfish/DroidFish.java
@@ -1228,6 +1228,8 @@ public class DroidFish extends Activity
         useWakeLock = settings.getBoolean("wakeLock", false);
         setWakeLock(useWakeLock);
 
+        String lang = settings.getString("language", "default");
+        setLanguage(lang);
         int fontSize = getIntSetting("fontSize", 12);
         int statusFontSize = fontSize;
         Configuration config = getResources().getConfiguration();
@@ -1317,6 +1319,23 @@ public class DroidFish extends Activity
         Util.overrideViewAttribs(findViewById(R.id.main));
     }
 
+    private final void setLanguage(String lang) {
+        Locale newLocale;
+        if (lang.equals("default")) {
+            newLocale = Resources.getSystem().getConfiguration().locale;
+        } else {
+            newLocale = new Locale(lang);
+        }
+        if (!newLocale.getLanguage().equals(Locale.getDefault().getLanguage())) {
+            Resources res = getResources();
+            Configuration config = res.getConfiguration();
+            config.locale = newLocale;
+            res.updateConfiguration(config, res.getDisplayMetrics());
+            Locale.setDefault(newLocale);
+            recreate();
+        }
+    }
+
     /**
      * Change the Pieces into figurine or regular (i.e. letters) display
      */