From ca07644bd089be1ac38d434633119537780b3614 Mon Sep 17 00:00:00 2001
From: triosi <triosi@proton.me>
Date: Thu, 20 Feb 2025 14:30:56 +0300
Subject: [PATCH] auto dark mode (only mac)

---
 .../sparrowwallet/sparrow/AppController.java  | 32 ++++++++++++++++---
 .../java/com/sparrowwallet/sparrow/Theme.java |  2 +-
 .../com/sparrowwallet/sparrow/app.fxml        |  5 +++
 3 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/src/main/java/com/sparrowwallet/sparrow/AppController.java b/src/main/java/com/sparrowwallet/sparrow/AppController.java
index 53c8cc8f..69aa0c5c 100644
--- a/src/main/java/com/sparrowwallet/sparrow/AppController.java
+++ b/src/main/java/com/sparrowwallet/sparrow/AppController.java
@@ -369,8 +369,8 @@ public class AppController implements Initializable {
 
         Theme configTheme = Config.get().getTheme();
         if(configTheme == null) {
-            configTheme = Theme.LIGHT;
-            Config.get().setTheme(Theme.LIGHT);
+            configTheme = Theme.SYSTEM_DEFAULT;
+            Config.get().setTheme(Theme.SYSTEM_DEFAULT);
         }
         final Theme selectedTheme = configTheme;
         Optional<Toggle> selectedThemeToggle = theme.getToggles().stream().filter(toggle -> selectedTheme.equals(toggle.getUserData())).findFirst();
@@ -2339,11 +2339,35 @@ public class AppController implements Initializable {
 
     public void setTheme(ActionEvent event) {
         Theme selectedTheme = (Theme)theme.getSelectedToggle().getUserData();
-        if(Config.get().getTheme() != selectedTheme) {
+        Theme themeToApply = selectedTheme;
+        if (selectedTheme == Theme.SYSTEM_DEFAULT) {
+            themeToApply = detectSystemTheme();
+        }
+
+        if (Config.get().getTheme() != selectedTheme) {
             Config.get().setTheme(selectedTheme);
         }
 
-        EventManager.get().post(new ThemeChangedEvent(selectedTheme));
+        EventManager.get().post(new ThemeChangedEvent(themeToApply));
+    }
+
+    private Theme detectSystemTheme() {
+        String os = System.getProperty("os.name").toLowerCase();
+        if (os.contains("mac")) {
+            return isMacDarkMode() ? Theme.DARK : Theme.LIGHT;
+        }
+        return Theme.LIGHT;
+    }
+
+    private boolean isMacDarkMode() {
+        try (BufferedReader reader = new BufferedReader(
+                new InputStreamReader(
+                    new ProcessBuilder("defaults", "read", "-g", "AppleInterfaceStyle").start().getInputStream()))) {
+            String result = reader.readLine();
+            return result != null && result.trim().equalsIgnoreCase("Dark");
+        } catch (IOException e) {
+            return false;
+        }
     }
 
     private void serverToggleStartAnimation() {
diff --git a/src/main/java/com/sparrowwallet/sparrow/Theme.java b/src/main/java/com/sparrowwallet/sparrow/Theme.java
index ee84ef92..94a5ac99 100644
--- a/src/main/java/com/sparrowwallet/sparrow/Theme.java
+++ b/src/main/java/com/sparrowwallet/sparrow/Theme.java
@@ -1,5 +1,5 @@
 package com.sparrowwallet.sparrow;
 
 public enum Theme {
-    LIGHT, DARK
+    SYSTEM_DEFAULT, LIGHT, DARK
 }
diff --git a/src/main/resources/com/sparrowwallet/sparrow/app.fxml b/src/main/resources/com/sparrowwallet/sparrow/app.fxml
index c8d461c6..7193b295 100644
--- a/src/main/resources/com/sparrowwallet/sparrow/app.fxml
+++ b/src/main/resources/com/sparrowwallet/sparrow/app.fxml
@@ -101,6 +101,11 @@
                         </Menu>
                         <Menu mnemonicParsing="false" text="Theme">
                             <items>
+                                <RadioMenuItem mnemonicParsing="false" text="System Default" toggleGroup="$theme" onAction="#setTheme">
+                                    <userData>
+                                        <Theme fx:constant="SYSTEM_DEFAULT" />
+                                    </userData>
+                                </RadioMenuItem>
                                 <RadioMenuItem mnemonicParsing="false" text="Light" toggleGroup="$theme" onAction="#setTheme">
                                     <userData>
                                         <Theme fx:constant="LIGHT" />