From 6d281e4e4492f89c81131b84b5d0f0cf5957eeb2 Mon Sep 17 00:00:00 2001
From: Jakob <gh@notjakob.com>
Date: Fri, 14 Jul 2023 12:37:00 +0200
Subject: [PATCH] add dark mode

---
 EnvyUpdate/App.xaml           |  1 -
 EnvyUpdate/App.xaml.cs        |  9 +++++++++
 EnvyUpdate/MainWindow.xaml.cs |  7 ++-----
 EnvyUpdate/Util.cs            | 29 +++++++++++++++++++++++++----
 4 files changed, 36 insertions(+), 10 deletions(-)

diff --git a/EnvyUpdate/App.xaml b/EnvyUpdate/App.xaml
index de53160..99d92b4 100644
--- a/EnvyUpdate/App.xaml
+++ b/EnvyUpdate/App.xaml
@@ -7,7 +7,6 @@
     <Application.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
-                <ui:ThemesDictionary Theme="Light"/>
                 <ui:ControlsDictionary />
             </ResourceDictionary.MergedDictionaries>
         </ResourceDictionary>
diff --git a/EnvyUpdate/App.xaml.cs b/EnvyUpdate/App.xaml.cs
index 3bd4437..92c551b 100644
--- a/EnvyUpdate/App.xaml.cs
+++ b/EnvyUpdate/App.xaml.cs
@@ -8,6 +8,7 @@ using System.Linq;
 using System.Threading.Tasks;
 using System.Windows;
 using Windows.Foundation.Collections;
+using Wpf.Ui.Markup;
 
 namespace EnvyUpdate
 {
@@ -18,6 +19,14 @@ namespace EnvyUpdate
     {
         protected override void OnStartup(StartupEventArgs e)
         {
+            Wpf.Ui.Appearance.Accent.ApplySystemAccent();
+            ThemesDictionary themedict = new ThemesDictionary();
+            if (Util.IsDarkTheme())
+                themedict.Theme = Wpf.Ui.Appearance.ThemeType.Dark;
+            else
+                themedict.Theme = Wpf.Ui.Appearance.ThemeType.Light;
+            Application.Current.Resources.MergedDictionaries.Add(themedict);
+
             // Listen to notification activation
             ToastNotificationManagerCompat.OnActivated += toastArgs =>
             {
diff --git a/EnvyUpdate/MainWindow.xaml.cs b/EnvyUpdate/MainWindow.xaml.cs
index 1d9eb37..1f6b74d 100644
--- a/EnvyUpdate/MainWindow.xaml.cs
+++ b/EnvyUpdate/MainWindow.xaml.cs
@@ -24,6 +24,8 @@ namespace EnvyUpdate
 
         public MainWindow()
         {
+            InitializeComponent();
+
             // Try to get command line arguments
             try
             {
@@ -83,11 +85,6 @@ namespace EnvyUpdate
 
             GlobalVars.isMobile = Util.IsMobile();
             Debug.LogToFile("INFO Mobile: " + GlobalVars.isMobile);
-
-            InitializeComponent();
-            Wpf.Ui.Appearance.Accent.ApplySystemAccent();
-
-            
         }
         private void Window_StateChanged(object sender, EventArgs e)
         {
diff --git a/EnvyUpdate/Util.cs b/EnvyUpdate/Util.cs
index c9fec1f..91e3124 100644
--- a/EnvyUpdate/Util.cs
+++ b/EnvyUpdate/Util.cs
@@ -6,13 +6,9 @@ using System.IO;
 using System.Linq;
 using System.Management;
 using System.Net;
-using System.Security.Cryptography;
 using System.Text.RegularExpressions;
-using System.Threading.Tasks;
 using System.Windows;
 using System.Xml.Linq;
-using Windows.Devices.Radios;
-using Windows.UI.Xaml.Input;
 
 namespace EnvyUpdate
 {
@@ -552,6 +548,31 @@ namespace EnvyUpdate
             }
         }
 
+        public static bool IsDarkTheme()
+        {
+            try
+            {
+                Debug.LogToFile("INFO Trying to get app theme...");
+                int res = (int)Registry.GetValue("HKEY_CURRENT_USER\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize", "AppsUseLightTheme", -1);
+                switch (res)
+                {
+                    case 0:
+                        Debug.LogToFile("INFO Using dark theme.");
+                        return true;
+                    case 1:
+                        Debug.LogToFile("INFO Using light theme.");
+                        return false;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+            catch (Exception)
+            {
+                Debug.LogToFile("WARN Could not determine theme. Setting light theme.");
+                return false;
+            }
+        }
+
         public static void DownloadFile(string fileURL, string savePath)
         {
             //TODO Implement downloading