67 lines
2.7 KiB
C#
67 lines
2.7 KiB
C#
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using System.CodeDom.Compiler;
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using System.Collections.Immutable;
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using System.Globalization;
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using System.Reflection;
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using System.Resources;
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using System.Text;
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using Microsoft.CodeAnalysis;
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using Microsoft.CodeAnalysis.CSharp.Syntax;
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using Microsoft.CodeAnalysis.Text;
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namespace RaiNote.PacketMediator;
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[Generator]
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public class PacketHandlerGenerator : IIncrementalGenerator
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{
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public void Initialize(IncrementalGeneratorInitializationContext context)
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{
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var structProvider = context.SyntaxProvider.CreateSyntaxProvider(
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predicate: static (node, _) => node is StructDeclarationSyntax,
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transform: static (ctx, _) => GetAttributesInheriting(ctx)
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)
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.Where(m => m is not null);
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var classProvider = context.SyntaxProvider.CreateSyntaxProvider(
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predicate: static (node, _) => node is ClassDeclarationSyntax,
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transform: static (ctx, _) => ctx.Node as ClassDeclarationSyntax
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)
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.Where(m => m is not null);
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var compilation = context.CompilationProvider.Combine(structProvider.Collect());
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context.RegisterSourceOutput(compilation, Execute);
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var writer = new IndentedTextWriter(new StringWriter());
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}
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private static ICollection<string> GetAttributesInheriting(GeneratorSyntaxContext context)
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{
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var arrayOfInheritingTypes = new List<string>();
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var structDeclarationSyntax = (StructDeclarationSyntax)context.Node;
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foreach (var attributeList in structDeclarationSyntax.AttributeLists)
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{
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foreach (var attribute in attributeList.Attributes)
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{
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if (context.SemanticModel.GetSymbolInfo(attribute).Symbol is not IMethodSymbol attributeSymbol)
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continue; // if we can't get the symbol, ignore it
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if (context.SemanticModel.GetSymbolInfo(attribute).Symbol is not ITypeSymbol attributeTypeSymbol)
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continue;
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if (!attributeTypeSymbol.AllInterfaces
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.Select(x => x.Name.Equals(typeof(PacketIdAttribute<>).ToString(), StringComparison.Ordinal))
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.Any())
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continue;
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arrayOfInheritingTypes.Add(attributeTypeSymbol.Name);
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}
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}
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return arrayOfInheritingTypes;
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}
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private void Execute(SourceProductionContext context,
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(Compilation Left, ImmutableArray<ICollection<string>> Right) valueTuple)
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{
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var (compilation, attributeNames) = valueTuple;
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var code = $@"{string.Join('\n', attributeNames)}";
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code += "\r\n";
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context.AddSource("Test.g.cs", SourceText.From(code, Encoding.UTF8));
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}
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}
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