public static ComposableCatalog WithDocumentTextDifferencingService(this ComposableCatalog catalog)
{
var assemblyQualifiedServiceTypeName = "Microsoft.CodeAnalysis.IDocumentTextDifferencingService, " + typeof(Workspace).GetTypeInfo().Assembly.GetName().ToString();
// Check to see if IDocumentTextDifferencingService is exported
foreach (var part in catalog.Parts)
{
foreach (var pair in part.ExportDefinitions)
{
var exportDefinition = pair.Value;
if (exportDefinition.ContractName != "Microsoft.CodeAnalysis.Host.IWorkspaceService")
{
continue;
}
if (!exportDefinition.Metadata.TryGetValue("ServiceType", out var value) ||
!(value is string serviceType))
{
continue;
}
if (serviceType != assemblyQualifiedServiceTypeName)
{
continue;
}
// The service is exported by default
return(catalog);
}
}
// If IDocumentTextDifferencingService is not exported by default, export it manually
var manualExportDefinition = new ExportDefinition(
typeof(IWorkspaceService).FullName,
metadata: new Dictionary <string, object?>
{
{ "ExportTypeIdentity", typeof(IWorkspaceService).FullName },
{ nameof(ExportWorkspaceServiceAttribute.ServiceType), assemblyQualifiedServiceTypeName },
{ nameof(ExportWorkspaceServiceAttribute.Layer), ServiceLayer.Default },
{ typeof(CreationPolicy).FullName, CreationPolicy.Shared },
{ "ContractType", typeof(IWorkspaceService) },
{ "ContractName", null },
});
var serviceImplType = typeof(Workspace).GetTypeInfo().Assembly.GetType("Microsoft.CodeAnalysis.DefaultDocumentTextDifferencingService");
return(catalog.AddPart(new ComposablePartDefinition(
TypeRef.Get(serviceImplType, Resolver.DefaultInstance),
new Dictionary <string, object?> {
{ "SharingBoundary", null }
},
new[] { manualExportDefinition },
new Dictionary <MemberRef, IReadOnlyCollection <ExportDefinition> >(),
Enumerable.Empty <ImportDefinitionBinding>(),
sharingBoundary: string.Empty,
default(MethodRef),
MethodRef.Get(serviceImplType.GetConstructors(BindingFlags.Instance | BindingFlags.Public).First(), Resolver.DefaultInstance),
new List <ImportDefinitionBinding>(),
CreationPolicy.Shared,
new[] { typeof(Workspace).GetTypeInfo().Assembly.GetName() },
isSharingBoundaryInferred: false)));
}
public static ComposableCatalog AddType(this ComposableCatalog composableCatalog, Type type) => composableCatalog.AddPart(Discovery.CreatePart(type));
