Hook into various methods to ensure slang code is populated when editor is open

csharp_mod/GlobalCode.cs

@@ -0,0 +1,99 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.IO.Compression;
+using System.Text;
+
+namespace Slang;
+
+public static class GlobalCode
+{
+    public const string SLANG_REF = "#SLANG_REF:";
+    public const string SLANG_SRC = "#SLANG_SRC:";
+
+    // This is a Dictionary of ENCODED source code, compressed
+    // so that save file data is smaller
+    private static Dictionary<Guid, string> codeDict = new();
+
+    public static void ClearCache()
+    {
+        codeDict.Clear();
+    }
+
+    public static string GetSource(Guid reference)
+    {
+        if (!codeDict.ContainsKey(reference))
+        {
+            return string.Empty;
+        }
+
+        return DecodeSource(codeDict[reference]);
+    }
+
+    public static void SetSource(Guid reference, string source)
+    {
+        codeDict[reference] = EncodeSource(source);
+    }
+
+    public static string? GetEncoded(Guid reference)
+    {
+        if (codeDict.ContainsKey(reference))
+            return null;
+
+        return codeDict[reference];
+    }
+
+    public static void SetEncoded(Guid reference, string encodedSource)
+    {
+        if (codeDict.ContainsKey(reference))
+        {
+            codeDict[reference] = encodedSource;
+        }
+        else
+        {
+            codeDict.Add(reference, encodedSource);
+        }
+    }
+
+    private static string EncodeSource(string source)
+    {
+        if (string.IsNullOrEmpty(source))
+        {
+            return "";
+        }
+
+        byte[] bytes = Encoding.UTF8.GetBytes(source);
+
+        using (var memoryStream = new MemoryStream())
+        {
+            using (var gzipStream = new GZipStream(memoryStream, CompressionMode.Compress))
+            {
+                gzipStream.Write(bytes, 0, bytes.Length);
+            }
+            return Convert.ToBase64String(memoryStream.ToArray());
+        }
+    }
+
+    private static string DecodeSource(string source)
+    {
+        if (string.IsNullOrEmpty(source))
+        {
+            return "";
+        }
+
+        byte[] compressedBytes = Convert.FromBase64String(source);
+
+        using (var memoryStream = new MemoryStream(compressedBytes))
+        {
+            using (var gzipStream = new GZipStream(memoryStream, CompressionMode.Decompress))
+            {
+                using (var outputStream = new MemoryStream())
+                {
+                    gzipStream.CopyTo(outputStream);
+
+                    return Encoding.UTF8.GetString(outputStream.ToArray());
+                }
+            }
+        }
+    }
+}