add: LoadingScene, ProxyNode

src/Generators/AssetRegisterGenerator.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Immutable;
+using System.IO;
+using System.Linq;
+using System.Text;
+using Microsoft.CodeAnalysis;
+
+namespace Polonium.Generators.Generators;
+[Generator]
+public class AssetRegisterGenerator : AssetProcessGenerator
+{
+    public override void Execute(GeneratorExecutionContext context)
+    {
+        if (!(context.SyntaxReceiver is ClassSyntaxReceiver receiver))
+            return;
+        Compilation compilation = context.Compilation;
+        StringBuilder sb = new();
+        sb
+            .AppendLine("using System;")
+            .AppendLine("using Godot;")
+            .AppendLine("using Polonium.Attributes;")
+            .AppendLine("[AutoRegister]")
+            .AppendLine("public static class AssetRegister")
+            .AppendLine("{")
+            .AppendLine("    public static void Register()")
+            .AppendLine("    {");
+        foreach (var derivedClassDeclaration in receiver.Classes)
+        {
+            SemanticModel model = compilation.GetSemanticModel(derivedClassDeclaration.SyntaxTree);
+            INamedTypeSymbol? symbol = model.GetDeclaredSymbol(derivedClassDeclaration) as INamedTypeSymbol;
+            string filePath = derivedClassDeclaration.SyntaxTree.FilePath.Replace(".cs", ".tscn");
+            if(!filePath.Contains("Assets") || symbol == null)
+                continue;
+            ImmutableArray<AdditionalText> additionalFiles = context.AdditionalFiles;
+            if (additionalFiles.Select(y => y.Path).Contains(filePath))
+            {
+                string rs = filePath.Replace("\\", "/").Replace(" ", "%20");
+                rs = rs.Substring(rs.IndexOf("Assets", StringComparison.Ordinal));
+                string gdPath = "res://" + rs;
+                string className = Path.GetFileNameWithoutExtension(filePath);
+                sb
+                    .AppendLine(
+                        $"        GlobalRegistry.Asset<{className}>.Scene = ResourceLoader.Load<PackedScene>(\"{gdPath}\");"
+                    );
+            }
+        }
+        sb
+            .AppendLine("    }")
+            .AppendLine("}");
+        context.AddSource("AssetRegistry.g.cs", sb.ToString());
+    }
+}