From c4dd91f51ed5a7845f3229e0a6f1e92a6a3d52d7 Mon Sep 17 00:00:00 2001
From: Bill Farmer <williamjfarmer@yahoo.co.uk>
Date: Sun, 21 May 2023 18:38:37 +0100
Subject: [PATCH] Add system theme

---
 build.gradle                                  |  2 +-
 .../org/billthefarmer/tuner/Settings.java     | 18 +++++++++++++
 .../java/org/billthefarmer/tuner/Tuner.java   | 25 ++++++++++++++++---
 src/main/res/values/arrays.xml                |  2 ++
 4 files changed, 42 insertions(+), 5 deletions(-)

diff --git a/build.gradle b/build.gradle
index e51416b..010ae17 100644
--- a/build.gradle
+++ b/build.gradle
@@ -42,7 +42,7 @@ android {
     }
 
     lintOptions {
-        disable 'IconDensities', 'ClickableViewAccessibility',
+        disable 'IconDensities', 'ClickableViewAccessibility', 'AndroidGradlePluginVersion',
             'CustomViewStyleable', 'TypographyFractions', 'OldTargetApi',
             'NonConstantResourceId', 'ExpiredTargetSdkVersion', 'MissingInflatedId'
         // abortOnError false
diff --git a/src/main/java/org/billthefarmer/tuner/Settings.java b/src/main/java/org/billthefarmer/tuner/Settings.java
index 611dd9c..646266d 100644
--- a/src/main/java/org/billthefarmer/tuner/Settings.java
+++ b/src/main/java/org/billthefarmer/tuner/Settings.java
@@ -26,6 +26,7 @@
 import android.app.ActionBar;
 import android.app.Activity;
 import android.content.SharedPreferences;
+import android.content.res.Configuration;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.view.MenuItem;
@@ -46,6 +47,10 @@ protected void onCreate(Bundle savedInstanceState)
 
         int theme = Integer.parseInt(preferences.getString(Tuner.PREF_THEME,
                                                            "0"));
+
+        Configuration config = getResources().getConfiguration();
+        int night = config.uiMode & Configuration.UI_MODE_NIGHT_MASK;
+
         switch (theme)
         {
         case Tuner.LIGHT:
@@ -56,6 +61,19 @@ protected void onCreate(Bundle savedInstanceState)
             setTheme(R.style.AppDarkTheme);
             break;
 
+        case Tuner.SYSTEM:
+            switch (night)
+            {
+            case Configuration.UI_MODE_NIGHT_NO:
+                setTheme(R.style.AppTheme);
+                break;
+
+            case Configuration.UI_MODE_NIGHT_YES:
+                setTheme(R.style.AppDarkTheme);
+                break;
+            }
+            break;
+
         case Tuner.WHITE:
             setTheme(R.style.AppWhiteTheme);
             break;
diff --git a/src/main/java/org/billthefarmer/tuner/Tuner.java b/src/main/java/org/billthefarmer/tuner/Tuner.java
index 07dbccb..3f4c603 100644
--- a/src/main/java/org/billthefarmer/tuner/Tuner.java
+++ b/src/main/java/org/billthefarmer/tuner/Tuner.java
@@ -276,10 +276,11 @@ public class Tuner extends Activity
          1.585609487, 1.676104963, 1.779786472, 1.881364210},
     };
 
-    public final static int LIGHT = 0;
-    public final static int DARK  = 1;
-    public final static int WHITE = 2;
-    public final static int BLACK = 3;
+    public final static int LIGHT  = 0;
+    public final static int DARK   = 1;
+    public final static int SYSTEM = 2;
+    public final static int WHITE  = 3;
+    public final static int BLACK  = 4;
 
     private double temperaments[][];
     private String names[];
@@ -308,6 +309,9 @@ protected void onCreate(Bundle savedInstanceState)
         // Get preferences
         getPreferences();
 
+        Configuration config = getResources().getConfiguration();
+        int night = config.uiMode & Configuration.UI_MODE_NIGHT_MASK;
+
         switch (theme)
         {
         case LIGHT:
@@ -318,6 +322,19 @@ protected void onCreate(Bundle savedInstanceState)
             setTheme(R.style.AppDarkTheme);
             break;
 
+        case SYSTEM:
+            switch (night)
+            {
+            case Configuration.UI_MODE_NIGHT_NO:
+                setTheme(R.style.AppTheme);
+                break;
+
+            case Configuration.UI_MODE_NIGHT_YES:
+                setTheme(R.style.AppDarkTheme);
+                break;
+            }
+            break;
+
         case WHITE:
             setTheme(R.style.AppWhiteTheme);
             break;
diff --git a/src/main/res/values/arrays.xml b/src/main/res/values/arrays.xml
index bbb4c28..9733df4 100644
--- a/src/main/res/values/arrays.xml
+++ b/src/main/res/values/arrays.xml
@@ -188,6 +188,7 @@
   <string-array name="pref_theme_entries">
     <item>Light</item>
     <item>Dark</item>
+    <item>System</item>
     <item>White</item>
     <item>Black</item>
   </string-array>
@@ -196,6 +197,7 @@
     <item>1</item>
     <item>2</item>
     <item>3</item>
+    <item>4</item>
   </string-array>
 
   <integer-array name="sample_rates">