Newtonsoft.Json -> System.Text.Json for Sprites.cs

Shared/Sprites.cs

@@ -1,7 +1,7 @@
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Content;
-using Newtonsoft.Json.Linq;
 using System.Collections.Generic;
+using System.Text.Json;
 
 namespace SemiColinGames {
   public static class Sprites {
@@ -61,29 +61,32 @@ namespace SemiColinGames {
       Texture = texture;
       animations = new Dictionary<string, SpriteAnimation>();
 
-      JObject json = JObject.Parse(metadataJson);
+      JsonElement jsonRoot = JsonDocument.Parse(metadataJson).RootElement;
 
       frames = new List<Frame>();
-      foreach (JToken child in json.SelectToken("frames").Children()) {
+      foreach (JsonElement child in jsonRoot.GetProperty("frames").EnumerateArray()) {
+        JsonElement frame = child.GetProperty("frame");
         Rectangle source = new Rectangle(
-            child.SelectToken("frame.x").Value<int>(),
-            child.SelectToken("frame.y").Value<int>(),
-            child.SelectToken("frame.w").Value<int>(),
-            child.SelectToken("frame.h").Value<int>());
-        double duration = child.SelectToken("duration").Value<double>() / 1000;
+            frame.GetProperty("x").GetInt32(),
+            frame.GetProperty("y").GetInt32(),
+            frame.GetProperty("w").GetInt32(),
+            frame.GetProperty("h").GetInt32());
+
+        double duration = child.GetProperty("duration").GetDouble() / 1000;
         frames.Add(new Frame(source, duration));
       }
+
       // We assume that all frames are the same size (which right now is assured by the
       // Aseprite-based spritesheet export process).
       Width = frames[0].Source.Width;
       Height = frames[0].Source.Height;
 
-      JToken frameTags = json.SelectToken("meta.frameTags");
-      foreach (JToken child in frameTags.Children()) {
-        string name = child.SelectToken("name").Value<string>();
-        int start = child.SelectToken("from").Value<int>();
-        int end = child.SelectToken("to").Value<int>();
-        string directionString = child.SelectToken("direction").Value<string>();
+      JsonElement frameTags = jsonRoot.GetProperty("meta").GetProperty("frameTags");
+      foreach (JsonElement child in frameTags.EnumerateArray()) {
+        string name = child.GetProperty("name").GetString();
+        int start = child.GetProperty("from").GetInt32();
+        int end = child.GetProperty("to").GetInt32();
+        string directionString = child.GetProperty("direction").GetString();
         AnimationDirection direction = directionString == "pingpong" ?
             AnimationDirection.PingPong : AnimationDirection.Forward;
         double duration = 0;