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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| using Bang.Generator.Extensions; | ||
| using Bang.Generator.Metadata; | ||
| using System.Collections.Immutable; | ||
| using Bang.Generator.Templating; | ||
| using Microsoft.CodeAnalysis; | ||
| using Microsoft.CodeAnalysis.CSharp.Syntax; | ||
| using Microsoft.CodeAnalysis.VisualBasic; | ||
|
|
||
| namespace Bang.Generator; | ||
|
|
||
| [Generator] | ||
| public sealed class BangExtensionsGenerator : IIncrementalGenerator | ||
| { | ||
| public void Initialize(IncrementalGeneratorInitializationContext context) | ||
| { | ||
| var potentialComponents = context.PotentialComponents().Collect(); | ||
| var stateMachines = context.PotentialStateMachines().Collect(); | ||
| var compilation = potentialComponents | ||
| .Combine(stateMachines) | ||
| .Combine(context.CompilationProvider); | ||
|
|
||
| context.RegisterSourceOutput( | ||
| compilation, | ||
| (c, t) => Execute(c, t.Right, t.Left.Left, t.Left.Right) | ||
| ); | ||
| } | ||
|
|
||
| public void Execute( | ||
| SourceProductionContext context, | ||
| Compilation compilation, | ||
| ImmutableArray<TypeDeclarationSyntax> potentialComponents, | ||
| ImmutableArray<ClassDeclarationSyntax> potentialStateMachines) | ||
| { | ||
| #if DEBUG | ||
| // Uncomment this if you need to use a debugger. | ||
| // if (!System.Diagnostics.Debugger.IsAttached) | ||
| // { | ||
| // System.Diagnostics.Debugger.Launch(); | ||
| // } | ||
| #endif | ||
|
|
||
| // Bail if any important type symbol is not resolvable. | ||
| var bangTypeSymbols = BangTypeSymbols.FromCompilation(compilation); | ||
| if (bangTypeSymbols is null) | ||
| return; | ||
|
|
||
| var referencedAssemblyTypeFetcher = new ReferencedAssemblyTypeFetcher(compilation); | ||
|
|
||
| // Gets the best possible name for the parent lookup class assemblies. | ||
| var parentLookupClass = referencedAssemblyTypeFetcher | ||
| .GetAllCompiledClassesWithSubtypes() | ||
| .Where(t => t.IsSubtypeOf(bangTypeSymbols.ComponentsLookupClass)) | ||
| .OrderBy(NumberOfParentClasses) | ||
| .LastOrDefault() ?? bangTypeSymbols.ComponentsLookupClass; | ||
|
|
||
| var projectName = compilation.AssemblyName?.Replace(".", "") ?? "My"; | ||
|
|
||
| var metadataFetcher = new MetadataFetcher(compilation); | ||
|
|
||
| // All files that will be created by this generator. | ||
| var templates = ImmutableArray.Create( | ||
| Templates.ComponentTypes(projectName), | ||
| Templates.MessageTypes(projectName), | ||
| Templates.EntityExtensions(projectName), | ||
| Templates.LookupImplementation(projectName) | ||
| ); | ||
|
|
||
| var projectMetadata = new TypeMetadata.Project( | ||
| projectName, | ||
| parentLookupClass.Name.Replace("ComponentsLookup", ""), | ||
| parentLookupClass.FullyQualifiedName() | ||
| ); | ||
| foreach (var template in templates) | ||
| { | ||
| template.Process(projectMetadata); | ||
| } | ||
|
|
||
| // Fetch all relevant metadata. | ||
| var allTypeMetadata = | ||
| metadataFetcher.FetchMetadata( | ||
| bangTypeSymbols, | ||
| potentialComponents, | ||
| potentialStateMachines | ||
| ); | ||
|
|
||
| // Process metadata. | ||
| foreach (var metadata in allTypeMetadata) | ||
| { | ||
| foreach (var template in templates) | ||
| { | ||
| template.Process(metadata); | ||
| } | ||
| } | ||
|
|
||
| // Generate sources. | ||
| foreach (var template in templates) | ||
| { | ||
| context.AddSource(template.FileName, template.GetDocumentWithReplacements()); | ||
| } | ||
| } | ||
|
|
||
| private static int NumberOfParentClasses(INamedTypeSymbol type) | ||
| => type.BaseType is null ? 0 : 1 + NumberOfParentClasses(type.BaseType); | ||
| } |
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