Fix the problem of font select (2dust#9405)

* Update OptionSettingWindow.axaml.cs

* Update OptionSettingWindow.axaml.cs

Author: xujiegb

v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml.cs

@@ -161,29 +161,18 @@ private async Task InitSettingFont()
 
     private async Task<List<string>> GetFonts()
     {
+        await Task.CompletedTask;
+
         var lstFonts = new List<string>();
         try
         {
-            if (Utils.IsWindows())
-            {
-                return lstFonts;
-            }
-            else if (Utils.IsNonWindows())
-            {
-                var result = await Utils.GetLinuxFontFamily("zh");
-                if (result.IsNullOrEmpty())
-                {
-                    return lstFonts;
-                }
-
-                var lst = result.Split(Environment.NewLine)
-                    .Where(t => t.IsNotEmpty())
-                    .ToList()
-                    .Select(t => t.Split(",").FirstOrDefault() ?? "")
-                    .OrderBy(t => t)
-                    .ToList();
-                return lst;
-            }
+            var lst = Avalonia.Media.FontManager.Current.SystemFonts
+                .Select(t => t.Name)
+                .Where(t => t.IsNotEmpty())
+                .Distinct(StringComparer.OrdinalIgnoreCase)
+                .OrderBy(t => t)
+                .ToList();
+            return lst;
         }
         catch (Exception ex)
         {