refactor: setup fonts based on operating system

src/App.axaml.cs

@@ -42,6 +42,7 @@ namespace SourceGit {
         public static AppBuilder BuildAvaloniaApp() {
             var builder = AppBuilder.Configure<App>();
             builder.UsePlatformDetect();
+            builder.LogToTrace();
             builder.ConfigureFonts(manager => {
                 var monospace = new EmbeddedFontCollection(
                     new Uri("fonts:SourceGit", UriKind.Absolute),
@@ -49,27 +50,7 @@ namespace SourceGit {
                 manager.AddFontCollection(monospace);
             });
 
-            if (OperatingSystem.IsWindows()) {
+            Native.OS.SetupFonts(builder);
-                builder.With(new FontManagerOptions() {
-                    DefaultFamilyName = "Microsoft YaHei UI",
-                    FontFallbacks = [
-                        new FontFallback { FontFamily = new FontFamily("Microsoft YaHei UI") }
-                    ]
-                });
-            } else if (OperatingSystem.IsMacOS()) {
-                builder.With(new FontManagerOptions() {
-                    DefaultFamilyName = "PingFang SC",
-                    FontFallbacks = [
-                        new FontFallback { FontFamily = new FontFamily("PingFang SC") }
-                    ]
-                });
-                builder.With(new MacOSPlatformOptions() {
-                    DisableDefaultApplicationMenuItems = true,
-                    DisableNativeMenus = true,
-                });
-            }
-            
-            builder.LogToTrace();
             return builder;
         }
 
@@ -104,11 +85,11 @@ namespace SourceGit {
 
         public static void SetTheme(string theme) {
             if (theme.Equals("Light", StringComparison.OrdinalIgnoreCase)) {
-                App.Current.RequestedThemeVariant = ThemeVariant.Light;
+                Current.RequestedThemeVariant = ThemeVariant.Light;
             } else if (theme.Equals("Dark", StringComparison.OrdinalIgnoreCase)) {
-                App.Current.RequestedThemeVariant = ThemeVariant.Dark;
+                Current.RequestedThemeVariant = ThemeVariant.Dark;
             } else {
-                App.Current.RequestedThemeVariant = ThemeVariant.Default;
+                Current.RequestedThemeVariant = ThemeVariant.Default;
             }
         }
 

src/Native/Linux.cs

@@ -1,10 +1,17 @@
-using System.Diagnostics;
+using Avalonia;
+using System.Diagnostics;
 using System.IO;
 using System.Runtime.Versioning;
 
 namespace SourceGit.Native {
     [SupportedOSPlatform("linux")]
     internal class Linux : OS.IBackend {
+        public void SetupFonts(AppBuilder builder) {
+        #if USE_FONT_INTER
+            builder.WithInterFont();
+        #endif
+        }
+
         public string FindGitExecutable() {
             if (File.Exists("/usr/bin/git")) return "/usr/bin/git";
             return string.Empty;

src/Native/MacOS.cs

@@ -1,4 +1,6 @@
-using System.Diagnostics;
+using Avalonia;
+using Avalonia.Media;
+using System.Diagnostics;
 using System.IO;
 using System.Runtime.Versioning;
 using System.Text;
@@ -6,6 +8,15 @@ using System.Text;
 namespace SourceGit.Native {
     [SupportedOSPlatform("macOS")]
     internal class MacOS : OS.IBackend {
+        public void SetupFonts(AppBuilder builder) {
+            builder.With(new FontManagerOptions() {
+                DefaultFamilyName = "PingFang SC",
+                FontFallbacks = [
+                    new FontFallback { FontFamily = new FontFamily("PingFang SC") }
+                ]
+            });
+        }
+
         public string FindGitExecutable() {
             if (File.Exists("/usr/bin/git")) return "/usr/bin/git";
             return string.Empty;

src/Native/OS.cs

@@ -1,9 +1,12 @@
-using System;
+using Avalonia;
+using System;
 using System.Diagnostics;
 
 namespace SourceGit.Native {
     public static class OS {
         public interface IBackend {
+            void SetupFonts(AppBuilder builder);
+
             string FindGitExecutable();
             string FindVSCode();
 
@@ -38,6 +41,10 @@ namespace SourceGit.Native {
             }
         }
 
+        public static void SetupFonts(AppBuilder builder) {
+            _backend?.SetupFonts(builder);
+        }
+
         public static string FindGitExecutable() {
             return _backend?.FindGitExecutable();
         }

src/Native/Windows.cs

@@ -1,4 +1,6 @@
-using System;
+using Avalonia;
+using Avalonia.Media;
+using System;
 using System.Diagnostics;
 using System.IO;
 using System.Runtime.InteropServices;
@@ -11,6 +13,15 @@ namespace SourceGit.Native {
         [DllImport("shlwapi.dll", CharSet = CharSet.Unicode, SetLastError = false)]
         private static extern bool PathFindOnPath([In, Out] StringBuilder pszFile, [In] string[] ppszOtherDirs);
 
+        public void SetupFonts(AppBuilder builder) {
+            builder.With(new FontManagerOptions() {
+                DefaultFamilyName = "Microsoft YaHei UI",
+                FontFallbacks = [
+                    new FontFallback { FontFamily = new FontFamily("Microsoft YaHei UI") }
+                ]
+            });
+        }
+
         public string FindGitExecutable() {
             var reg = Microsoft.Win32.RegistryKey.OpenBaseKey(
                 Microsoft.Win32.RegistryHive.LocalMachine,

src/SourceGit.csproj

@@ -20,6 +20,10 @@
     <RepositoryType>Public</RepositoryType>
   </PropertyGroup>
   
+  <PropertyGroup Condition="$([MSBuild]::IsOSPlatform('Linux'))">
+    <DefineConstants>$(DefineConstants);USE_FONT_INTER</DefineConstants>
+  </PropertyGroup>
+
   <ItemGroup>
     <AvaloniaResource Include="App.ico" />
     <AvaloniaResource Include="Resources/Fonts/*" />
@@ -27,6 +31,7 @@
 
   <ItemGroup>
     <PackageReference Include="Avalonia" Version="11.0.10" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.0.10" Condition="$([MSBuild]::IsOSPlatform('Linux'))" />
     <PackageReference Include="Avalonia.Desktop" Version="11.0.10" />
     <PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.10" />
     <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.0.10" />