private async Task <Document> ConvertToAsyncPackageAsync(CodeFixContext context, Diagnostic diagnostic, CancellationToken cancellationToken)
{
SemanticModel semanticModel = await context.Document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
Compilation?compilation = await context.Document.Project.GetCompilationAsync(cancellationToken).ConfigureAwait(false);
Assumes.NotNull(compilation);
SyntaxNode root = await context.Document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
BaseTypeSyntax baseTypeSyntax = root.FindNode(diagnostic.Location.SourceSpan).FirstAncestorOrSelf <BaseTypeSyntax>();
ClassDeclarationSyntax classDeclarationSyntax = baseTypeSyntax.FirstAncestorOrSelf <ClassDeclarationSyntax>();
MethodDeclarationSyntax initializeMethodSyntax = classDeclarationSyntax.DescendantNodes()
.OfType <MethodDeclarationSyntax>()
.FirstOrDefault(method => method.Modifiers.Any(modifier => modifier.IsKind(SyntaxKind.OverrideKeyword)) && method.Identifier.Text == Types.Package.Initialize);
InvocationExpressionSyntax?baseInitializeInvocationSyntax = initializeMethodSyntax?.Body?.DescendantNodes()
.OfType <InvocationExpressionSyntax>()
.FirstOrDefault(ies => ies.Expression is MemberAccessExpressionSyntax memberAccess && memberAccess.Name?.Identifier.Text == Types.Package.Initialize && memberAccess.Expression is BaseExpressionSyntax);
var getServiceInvocationsSyntax = new List <InvocationExpressionSyntax>();
AttributeSyntax?packageRegistrationSyntax = null;
{
INamedTypeSymbol userClassSymbol = semanticModel.GetDeclaredSymbol(classDeclarationSyntax, context.CancellationToken);
INamedTypeSymbol packageRegistrationType = compilation.GetTypeByMetadataName(Types.PackageRegistrationAttribute.FullName);
AttributeData? packageRegistrationInstance = userClassSymbol?.GetAttributes().FirstOrDefault(a => Equals(a.AttributeClass, packageRegistrationType));
if (packageRegistrationInstance?.ApplicationSyntaxReference != null)
{
packageRegistrationSyntax = (AttributeSyntax)await packageRegistrationInstance.ApplicationSyntaxReference.GetSyntaxAsync(cancellationToken).ConfigureAwait(false);
}
}
if (initializeMethodSyntax != null)
{
getServiceInvocationsSyntax.AddRange(
from invocation in initializeMethodSyntax.DescendantNodes().OfType <InvocationExpressionSyntax>()
let memberBinding = invocation.Expression as MemberAccessExpressionSyntax
let identifierName = invocation.Expression as IdentifierNameSyntax
where identifierName?.Identifier.Text == Types.Package.GetService ||
(memberBinding.Name.Identifier.Text == Types.Package.GetService && memberBinding.Expression.IsKind(SyntaxKind.ThisExpression))
select invocation);
}
// Make it easier to track nodes across changes.
var nodesToTrack = new List <SyntaxNode?>
{
baseTypeSyntax,
initializeMethodSyntax,
baseInitializeInvocationSyntax,
packageRegistrationSyntax,
};
nodesToTrack.AddRange(getServiceInvocationsSyntax);
nodesToTrack.RemoveAll(n => n == null);
SyntaxNode updatedRoot = root.TrackNodes(nodesToTrack);
// Replace the Package base type with AsyncPackage
baseTypeSyntax = updatedRoot.GetCurrentNode(baseTypeSyntax);
SimpleBaseTypeSyntax asyncPackageBaseTypeSyntax = SyntaxFactory.SimpleBaseType(Types.AsyncPackage.TypeSyntax.WithAdditionalAnnotations(Simplifier.Annotation))
.WithLeadingTrivia(baseTypeSyntax.GetLeadingTrivia())
.WithTrailingTrivia(baseTypeSyntax.GetTrailingTrivia());
updatedRoot = updatedRoot.ReplaceNode(baseTypeSyntax, asyncPackageBaseTypeSyntax);
// Update the PackageRegistration attribute
if (packageRegistrationSyntax != null)
{
LiteralExpressionSyntax trueExpression = SyntaxFactory.LiteralExpression(SyntaxKind.TrueLiteralExpression);
packageRegistrationSyntax = updatedRoot.GetCurrentNode(packageRegistrationSyntax);
AttributeArgumentSyntax allowsBackgroundLoadingSyntax = packageRegistrationSyntax.ArgumentList.Arguments.FirstOrDefault(a => a.NameEquals?.Name?.Identifier.Text == Types.PackageRegistrationAttribute.AllowsBackgroundLoading);
if (allowsBackgroundLoadingSyntax != null)
{
updatedRoot = updatedRoot.ReplaceNode(
allowsBackgroundLoadingSyntax,
allowsBackgroundLoadingSyntax.WithExpression(trueExpression));
}
else
{
updatedRoot = updatedRoot.ReplaceNode(
packageRegistrationSyntax,
packageRegistrationSyntax.AddArgumentListArguments(
SyntaxFactory.AttributeArgument(trueExpression).WithNameEquals(SyntaxFactory.NameEquals(Types.PackageRegistrationAttribute.AllowsBackgroundLoading))));
}
}
// Find the Initialize override, if present, and update it to InitializeAsync
if (initializeMethodSyntax != null)
{
IdentifierNameSyntax cancellationTokenLocalVarName = SyntaxFactory.IdentifierName("cancellationToken");
IdentifierNameSyntax progressLocalVarName = SyntaxFactory.IdentifierName("progress");
initializeMethodSyntax = updatedRoot.GetCurrentNode(initializeMethodSyntax);
BlockSyntax newBody = initializeMethodSyntax.Body;
SyntaxTriviaList leadingTrivia = SyntaxFactory.TriviaList(
SyntaxFactory.Comment(@"// When initialized asynchronously, we *may* be on a background thread at this point."),
SyntaxFactory.CarriageReturnLineFeed,
SyntaxFactory.Comment(@"// Do any initialization that requires the UI thread after switching to the UI thread."),
SyntaxFactory.CarriageReturnLineFeed,
SyntaxFactory.Comment(@"// Otherwise, remove the switch to the UI thread if you don't need it."),
SyntaxFactory.CarriageReturnLineFeed);
ExpressionStatementSyntax switchToMainThreadStatement = SyntaxFactory.ExpressionStatement(
SyntaxFactory.AwaitExpression(
SyntaxFactory.InvocationExpression(
SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
SyntaxFactory.ThisExpression(),
SyntaxFactory.IdentifierName(Types.ThreadHelper.JoinableTaskFactory)),
SyntaxFactory.IdentifierName(Types.JoinableTaskFactory.SwitchToMainThreadAsync)))
.AddArgumentListArguments(SyntaxFactory.Argument(cancellationTokenLocalVarName))))
.WithLeadingTrivia(leadingTrivia)
.WithTrailingTrivia(SyntaxFactory.CarriageReturnLineFeed);
if (baseInitializeInvocationSyntax != null)
{
var baseInitializeAsyncInvocationBookmark = new SyntaxAnnotation();
AwaitExpressionSyntax baseInitializeAsyncInvocationSyntax = SyntaxFactory.AwaitExpression(
baseInitializeInvocationSyntax
.WithLeadingTrivia()
.WithExpression(
SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
SyntaxFactory.BaseExpression(),
SyntaxFactory.IdentifierName(Types.AsyncPackage.InitializeAsync)))
.AddArgumentListArguments(
SyntaxFactory.Argument(cancellationTokenLocalVarName),
SyntaxFactory.Argument(progressLocalVarName)))
.WithLeadingTrivia(baseInitializeInvocationSyntax.GetLeadingTrivia())
.WithAdditionalAnnotations(baseInitializeAsyncInvocationBookmark);
newBody = newBody.ReplaceNode(initializeMethodSyntax.GetCurrentNode(baseInitializeInvocationSyntax), baseInitializeAsyncInvocationSyntax);
StatementSyntax baseInvocationStatement = newBody.GetAnnotatedNodes(baseInitializeAsyncInvocationBookmark).First().FirstAncestorOrSelf <StatementSyntax>();
newBody = newBody.InsertNodesAfter(
baseInvocationStatement,
new[] { switchToMainThreadStatement.WithLeadingTrivia(switchToMainThreadStatement.GetLeadingTrivia().Insert(0, SyntaxFactory.LineFeed)) });
}
else
{
newBody = newBody.WithStatements(
newBody.Statements.Insert(0, switchToMainThreadStatement));
}
MethodDeclarationSyntax initializeAsyncMethodSyntax = initializeMethodSyntax
.WithIdentifier(SyntaxFactory.Identifier(Types.AsyncPackage.InitializeAsync))
.WithReturnType(Types.Task.TypeSyntax.WithAdditionalAnnotations(Simplifier.Annotation))
.AddModifiers(SyntaxFactory.Token(SyntaxKind.AsyncKeyword))
.AddParameterListParameters(
SyntaxFactory.Parameter(cancellationTokenLocalVarName.Identifier).WithType(Types.CancellationToken.TypeSyntax.WithAdditionalAnnotations(Simplifier.Annotation)),
SyntaxFactory.Parameter(progressLocalVarName.Identifier).WithType(Types.IProgress.TypeSyntaxOf(Types.ServiceProgressData.TypeSyntax).WithAdditionalAnnotations(Simplifier.Annotation)))
.WithBody(newBody);
updatedRoot = updatedRoot.ReplaceNode(initializeMethodSyntax, initializeAsyncMethodSyntax);
// Replace GetService calls with GetServiceAsync
getServiceInvocationsSyntax = updatedRoot.GetCurrentNodes <InvocationExpressionSyntax>(getServiceInvocationsSyntax).ToList();
updatedRoot = updatedRoot.ReplaceNodes(
getServiceInvocationsSyntax,
(orig, node) =>
{
InvocationExpressionSyntax invocation = node;
if (invocation.Expression is IdentifierNameSyntax methodName)
{
invocation = invocation.WithExpression(SyntaxFactory.IdentifierName(Types.AsyncPackage.GetServiceAsync));
}
else if (invocation.Expression is MemberAccessExpressionSyntax memberAccess)
{
invocation = invocation.WithExpression(
memberAccess.WithName(SyntaxFactory.IdentifierName(Types.AsyncPackage.GetServiceAsync)));
}
return(SyntaxFactory.ParenthesizedExpression(SyntaxFactory.AwaitExpression(invocation))
.WithAdditionalAnnotations(Simplifier.Annotation));
});
updatedRoot = await Utils.AddUsingTaskEqualsDirectiveAsync(updatedRoot, cancellationToken);
}
Document newDocument = context.Document.WithSyntaxRoot(updatedRoot);
newDocument = await ImportAdder.AddImportsAsync(newDocument, Simplifier.Annotation, cancellationToken : cancellationToken);
return(newDocument);
}
public BlockSyntax AddVariablesToBlock(BlockSyntax block)
{
//block = block.
int totalVariables = Variables.Count;
int currentVariable = 0;
//SyntaxToken insertAfter = block.GetFirstToken();
SyntaxNode insertNode = null;
bool insertIsAfter = true;
int insertSpanStart = 0;
foreach (var variable in Variables.OrderBy(n => n.Key))
{
currentVariable++;
if (currentVariable < 3)
{
continue;
}
if (variable.Value.Static &&
variable.Value.Used == true)
{
if (variable.Value.Used == false)
{
Console.WriteLine();
}
//SyntaxToken firstToken = block.DescendantTokens().Where(n => n.HasAnnotation(new SyntaxAnnotation("StaticVar", variable.Key.ToString()))).Single();
//find the static value
object staticValue = GetCurrentValue(variable.Key);
//SyntaxKind literalKind;
//if (staticValue is string)
//{
// staticValue = "\"" + (string)staticValue + "\"";
//}
//foreach (var node in block.DescendantNodes().OfType<LiteralExpressionSyntax>().Where(n => n.GetText().ToString() == staticValue.ToString()))
//{
// Console.WriteLine();
// //insertAfter = node.DescendantNodes().Where(n => n.Kind() == SyntaxKind.SemicolonToken).First();
// break;
//}
//SyntaxNode fromNode = null;
//if (insertAfterNode == null)
//{
// fromNode = block;
//}
//else
//{
// fromNode = insertAfterNode;
//}
//foreach (var token in block.DescendantTokens().Where(n => n.ValueText == staticValue.ToString()).Where(o => o.SpanStart > insertSpanStart).First())
//{
var tokens = block.DescendantTokens().Where(n => n.ValueText == staticValue.ToString() && n.SpanStart > insertSpanStart);
if (tokens.Count() > 0)
{
var token = tokens.First();
SyntaxToken insertToken = FindNextSemi(token);
if (insertToken.Kind() == SyntaxKind.SemicolonToken)
{
insertNode = insertToken.Parent;
insertIsAfter = true;
}
else
{
if (insertToken.Parent.ChildNodes().Count() > 0)
{
insertNode = insertToken.Parent.ChildNodes().First();
insertIsAfter = false;
}
else
{
insertNode = insertToken.Parent;
insertIsAfter = true;
}
}
insertSpanStart = token.SpanStart;
// break;
//}
}
}
else
{
//SyntaxTokenList newTokens = new SyntaxTokenList();
//newTokens = newTokens.Add(insertAfter);
LocalDeclarationStatementSyntax localDeclarationStatementSyntax = GetVariableDeclaration(variable.Value);
//newTokens.Add(variableToken.DescendantNodesAndTokensAndSelf);
//block = block.ReplaceToken(insertAfter, insertAfter);
//StatementSyntax statementSyntax = localDeclarationStatementSyntax as StatementSyntax;
//var varNode = SyntaxFactory.("\"valid regex\"");
//SyntaxAnnotation syntaxAnnotation = new SyntaxAnnotation("Variable", variable.Key.ToString());
BlockSyntax addBlock = SyntaxFactory.Block(localDeclarationStatementSyntax); //.WithAdditionalAnnotations(syntaxAnnotation);
if (insertNode == null)
{
block = block.InsertNodesBefore(block.ChildNodes().First(), addBlock.ChildNodes());
}
else
{
if (insertIsAfter)
{
block = block.InsertNodesAfter(insertNode, addBlock.ChildNodes());
}
else
{
block = block.InsertNodesBefore(insertNode, addBlock.ChildNodes());
}
}
//insertAfterNode = block.DescendantNodes().OfType<LocalDeclarationStatementSyntax>().Where(n => n.HasAnnotation(syntaxAnnotation)).Single();
insertNode = block.DescendantNodes().OfType <LocalDeclarationStatementSyntax>().Last();
insertSpanStart = insertNode.SpanStart;
insertIsAfter = true;
}
}
return(block);
}