78 lines
2.9 KiB
C#
78 lines
2.9 KiB
C#
using System.Collections.Generic;
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using System.Collections.Immutable;
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using System.Linq;
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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 Nebula.SourceGenerators;
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[Generator]
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public class DependencyAutoGenerator : IIncrementalGenerator
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{
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private static readonly string ConstructGeneratorAttributeName = "Nebula.Shared.Attributes.ConstructGeneratorAttribute";
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private static readonly string GeneratePropertyAttributeName = "Nebula.Shared.Attributes.GeneratePropertyAttribute";
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public void Initialize(IncrementalGeneratorInitializationContext context)
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{
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var provider = context.SyntaxProvider
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.CreateSyntaxProvider(
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(s, _) => s is ClassDeclarationSyntax,
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(ctx, _) => SourceHelper.GetClassDeclarationForSourceGen(ctx,ConstructGeneratorAttributeName))
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.Where(t => t.reportAttributeFound)
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.Select((t, _) => t.Item1);
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context.RegisterSourceOutput(context.CompilationProvider.Combine(provider.Collect()),
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(ctx, t) => GenerateCode(ctx, t.Left, t.Right));
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}
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private void GenerateCode(SourceProductionContext context, Compilation compilation,
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ImmutableArray<ClassDeclarationSyntax> classDeclarations)
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{
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foreach (var classDeclarationSyntax in classDeclarations)
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{
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var semanticModel = compilation.GetSemanticModel(classDeclarationSyntax.SyntaxTree);
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if (semanticModel.GetDeclaredSymbol(classDeclarationSyntax) is not INamedTypeSymbol classSymbol)
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continue;
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var namespaceName = classSymbol.ContainingNamespace.ToDisplayString();
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var className = classDeclarationSyntax.Identifier.Text;
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var defaultConstruct = $@"public {className}(){{
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InitialiseInDesignMode();
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}}";
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var propertiesGenerated = GetProperties(classSymbol).ToList();
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var constr = propertiesGenerated.Select(a => $"{a.Type.ToDisplayString()} g{a.Name}");
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var body = propertiesGenerated.Select(a => $"this.{a.Name} = g{a.Name};");
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//if (!constr.Any()) defaultConstruct = "";
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var code = $@"// <auto-generated/>
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namespace {namespaceName};
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partial class {className}
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{{
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{defaultConstruct}
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public {className}(
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{string.Join(",\n\t\t", constr)}
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) : base(){{
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{string.Join("\n\t\t", body)}
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Initialise();
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}}
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}}
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";
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// Add the source code to the compilation.
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context.AddSource($"{className}.g.cs", SourceText.From(code, Encoding.UTF8));
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}
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}
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private static IEnumerable<IPropertySymbol> GetProperties(INamedTypeSymbol classSymbol)
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{
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return classSymbol.GetMembers().OfType<IPropertySymbol>().Where(a =>
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SourceHelper.HasAttribute(a, GeneratePropertyAttributeName));
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}
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} |