From ed09b6549ab8f6cccee7c720614910a763a16d88 Mon Sep 17 00:00:00 2001
From: sabihoshi <sabihoshi.dev@gmail.com>
Date: Fri, 7 May 2021 11:51:00 +0800
Subject: [PATCH] Retrieve the last resolution user has set

---
 GenshinLauncher/GenshinLauncher.csproj        |  2 +-
 GenshinLauncher/Models/Resolution.cs          | 37 ++++++++++++++++++-
 .../ViewModels/MainWindowViewModel.cs         | 16 +++++++-
 3 files changed, 51 insertions(+), 4 deletions(-)

diff --git a/GenshinLauncher/GenshinLauncher.csproj b/GenshinLauncher/GenshinLauncher.csproj
index 1d16d63..984ccfe 100644
--- a/GenshinLauncher/GenshinLauncher.csproj
+++ b/GenshinLauncher/GenshinLauncher.csproj
@@ -13,7 +13,7 @@
     <RepositoryUrl>https://github.com/sabihoshi/GenshinLauncher</RepositoryUrl>
     <Description>A Genshin Impact launcher with more options in Modern Fluent UI.</Description>
     <ApplicationIcon>GenshinImpactIcon.ico</ApplicationIcon>
-    <Version>1.2.2</Version>
+    <Version>1.3.0</Version>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
diff --git a/GenshinLauncher/Models/Resolution.cs b/GenshinLauncher/Models/Resolution.cs
index 46b38b6..09e1fe8 100644
--- a/GenshinLauncher/Models/Resolution.cs
+++ b/GenshinLauncher/Models/Resolution.cs
@@ -1,8 +1,10 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
+using System.Linq;
 
 namespace GenshinLauncher.Models
 {
-    public class Resolution
+    public class Resolution : IEquatable<Resolution>
     {
         public static List<Resolution> Presets = new()
         {
@@ -32,6 +34,37 @@ public Resolution(int width, int height)
 
         public int Width { get; set; }
 
+        public bool Equals(Resolution? other)
+        {
+            if (ReferenceEquals(null, other)) return false;
+            if (ReferenceEquals(this, other)) return true;
+            return Height == other.Height && Width == other.Width;
+        }
+
+        public static Resolution GetResolution(int width, int height)
+        {
+            var other = new Resolution(width, height);
+            var resolution = Presets.FirstOrDefault(r => r.Equals(other));
+
+            if (resolution is null)
+            {
+                Presets.Add(other);
+                return other;
+            }
+
+            return resolution;
+        }
+
         public override string ToString() => $"{Width}x{Height}";
+
+        public override bool Equals(object? obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != GetType()) return false;
+            return Equals((Resolution) obj);
+        }
+
+        public override int GetHashCode() => HashCode.Combine(Height, Width);
     }
 }
\ No newline at end of file
diff --git a/GenshinLauncher/ViewModels/MainWindowViewModel.cs b/GenshinLauncher/ViewModels/MainWindowViewModel.cs
index a2595ad..270b3a6 100644
--- a/GenshinLauncher/ViewModels/MainWindowViewModel.cs
+++ b/GenshinLauncher/ViewModels/MainWindowViewModel.cs
@@ -18,7 +18,7 @@ public class MainWindowViewModel : Screen
         public MainWindowViewModel()
         {
             Quality    = new();
-            Resolution = Resolution.Presets.Last();
+            Resolution = GetLastResolution();
         }
 
         public Command Client => Cli.Wrap(Location);
@@ -90,6 +90,20 @@ public async Task SetLocation()
             if (!(success && set)) await LocationMissing();
         }
 
+        private Resolution GetLastResolution()
+        {
+            var config = Registry.CurrentUser
+                .OpenSubKey(@"SOFTWARE\miHoYo\Genshin Impact", false);
+
+            var w = config.GetValue(@"Screenmanager Resolution Width_h182942802");
+            var h = config.GetValue(@"Screenmanager Resolution Height_h2627697771");
+
+            if (w is int width && h is int height)
+                return Resolution.GetResolution(width, height);
+
+            return Resolution.Presets.Last();
+        }
+
         private bool TryGetLocation()
         {
             var locations = new[]