public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out MemberDeclarationSyntax memberDeclaration))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.FormatDeclarationBraces:
{
CodeAction codeAction = CodeAction.Create(
"Format braces",
cancellationToken => FormatDeclarationBracesRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.RemoveRedundantOverridingMember:
{
CodeAction codeAction = CodeAction.Create(
$"Remove {memberDeclaration.GetTitle()}",
cancellationToken => context.Document.RemoveMemberAsync(memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.AddDefaultAccessModifier:
{
var accessibility = (Accessibility)Enum.Parse(
typeof(Accessibility),
context.Diagnostics[0].Properties[nameof(Accessibility)]);
CodeAction codeAction = CodeAction.Create(
"Add default access modifier",
cancellationToken => AddDefaultAccessModifierRefactoring.RefactorAsync(context.Document, memberDeclaration, accessibility, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.AddEmptyLineBetweenDeclarations:
{
CodeAction codeAction = CodeAction.Create(
"Add empty line",
cancellationToken => AddEmptyLineBetweenDeclarationsRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.RemoveRedundantSealedModifier:
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, memberDeclaration, SyntaxKind.SealedKeyword);
break;
}
case DiagnosticIdentifiers.AvoidSemicolonAtEndOfDeclaration:
{
CodeAction codeAction = CodeAction.Create(
"Remove unnecessary semicolon",
cancellationToken => AvoidSemicolonAtEndOfDeclarationRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.ReorderModifiers:
{
CodeAction codeAction = CodeAction.Create(
"Reorder modifiers",
cancellationToken => ReorderModifiersRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.MarkFieldAsReadOnly:
{
var fieldDeclaration = (FieldDeclarationSyntax)memberDeclaration;
SeparatedSyntaxList <VariableDeclaratorSyntax> declarators = fieldDeclaration.Declaration.Variables;
string title = (declarators.Count == 1)
? $"Mark '{declarators[0].Identifier.ValueText}' as read-only"
: "Mark fields as read-only";
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, fieldDeclaration, SyntaxKind.ReadOnlyKeyword, title: title);
break;
}
case DiagnosticIdentifiers.UseConstantInsteadOfField:
{
CodeAction codeAction = CodeAction.Create(
"Use constant instead of field",
cancellationToken => UseConstantInsteadOfFieldRefactoring.RefactorAsync(context.Document, (FieldDeclarationSyntax)memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.UseReadOnlyAutoProperty:
{
CodeAction codeAction = CodeAction.Create(
"Use read-only auto-property",
cancellationToken => UseReadOnlyAutoPropertyRefactoring.RefactorAsync(context.Document, (PropertyDeclarationSyntax)memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.ReplaceCommentWithDocumentationComment:
{
CodeAction codeAction = CodeAction.Create(
ReplaceCommentWithDocumentationCommentRefactoring.Title,
cancellationToken => ReplaceCommentWithDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
MemberDeclarationSyntax memberDeclaration = root
.FindNode(context.Span, getInnermostNodeForTie: true)?
.FirstAncestorOrSelf <MemberDeclarationSyntax>();
Debug.Assert(memberDeclaration != null, $"{nameof(memberDeclaration)} is null");
if (memberDeclaration == null)
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.FormatDeclarationBraces:
{
CodeAction codeAction = CodeAction.Create(
"Format braces",
cancellationToken => FormatDeclarationBracesRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.MarkMemberAsStatic:
{
CodeAction codeAction = CodeAction.Create(
$"Mark {memberDeclaration.GetTitle()} as static",
cancellationToken => MarkMemberAsStaticRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.AddDocumentationComment:
{
CodeAction codeAction = CodeAction.Create(
"Add documentation comment",
cancellationToken => AddDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, false, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
CodeAction codeAction2 = CodeAction.Create(
"Add documentation comment (copy from base if available)",
cancellationToken => AddDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, true, cancellationToken),
diagnostic.Id + "CopyFromBaseIfAvailable" + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction2, diagnostic);
break;
}
case DiagnosticIdentifiers.RemoveRedundantOverridingMember:
{
CodeAction codeAction = CodeAction.Create(
$"Remove redundant overridding {memberDeclaration.GetTitle()}",
cancellationToken => context.Document.RemoveMemberAsync(memberDeclaration, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.MarkContainingClassAsAbstract:
{
CodeAction codeAction = CodeAction.Create(
"Mark containing class as abstract",
cancellationToken => MarkContainingClassAsAbstractRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.MemberTypeMustMatchOverriddenMemberType:
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ITypeSymbol typeSymbol = null;
switch (memberDeclaration.Kind())
{
case SyntaxKind.MethodDeclaration:
{
var methodSymbol = (IMethodSymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
typeSymbol = methodSymbol.OverriddenMethod.ReturnType;
break;
}
case SyntaxKind.PropertyDeclaration:
case SyntaxKind.IndexerDeclaration:
{
var propertySymbol = (IPropertySymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
typeSymbol = propertySymbol.OverriddenProperty.Type;
break;
}
case SyntaxKind.EventDeclaration:
{
var eventSymbol = (IEventSymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
typeSymbol = eventSymbol.OverriddenEvent.Type;
break;
}
case SyntaxKind.EventFieldDeclaration:
{
VariableDeclaratorSyntax declarator = ((EventFieldDeclarationSyntax)memberDeclaration).Declaration.Variables.First();
var eventSymbol = (IEventSymbol)semanticModel.GetDeclaredSymbol(declarator, context.CancellationToken);
typeSymbol = eventSymbol.OverriddenEvent.Type;
break;
}
}
int position = memberDeclaration.SpanStart;
TypeSyntax newType = typeSymbol.ToMinimalTypeSyntax(semanticModel, position);
string title = (memberDeclaration.IsKind(SyntaxKind.MethodDeclaration))
? "Change return type to "
: "Change type to ";
title += $"'{SymbolDisplay.GetMinimalString(typeSymbol, semanticModel, position)}'";
CodeAction codeAction = CodeAction.Create(
title,
cancellationToken => MemberTypeMustMatchOverriddenMemberTypeRefactoring.RefactorAsync(context.Document, memberDeclaration, newType, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.AddDefaultAccessModifier:
{
var accessibility = (Accessibility)Enum.Parse(
typeof(Accessibility),
context.Diagnostics[0].Properties[nameof(Accessibility)]);
CodeAction codeAction = CodeAction.Create(
"Add default access modifier",
cancellationToken => AddDefaultAccessModifierRefactoring.RefactorAsync(context.Document, memberDeclaration, accessibility, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.AddEmptyLineBetweenDeclarations:
{
CodeAction codeAction = CodeAction.Create(
"Add empty line",
cancellationToken => AddEmptyLineBetweenDeclarationsRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.RemoveRedundantSealedModifier:
{
CodeAction codeAction = CodeAction.Create(
"Remove sealed modifier",
cancellationToken => RemoveRedundantSealedModifierRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.AvoidSemicolonAtEndOfDeclaration:
{
CodeAction codeAction = CodeAction.Create(
"Remove unnecessary semicolon",
cancellationToken => AvoidSemicolonAtEndOfDeclarationRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.ReorderModifiers:
{
CodeAction codeAction = CodeAction.Create(
"Reorder modifiers",
cancellationToken => ReorderModifiersRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.OverridingMemberCannotChangeAccessModifiers:
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
OverrideInfo overrideInfo = OverridingMemberCannotChangeAccessModifiersRefactoring.GetOverrideInfo(memberDeclaration, semanticModel, context.CancellationToken);
string title = $"Change accessibility to '{OverridingMemberCannotChangeAccessModifiersRefactoring.GetAccessibilityText(overrideInfo.OverridenSymbol.DeclaredAccessibility)}'";
CodeAction codeAction = CodeAction.Create(
title,
cancellationToken => OverridingMemberCannotChangeAccessModifiersRefactoring.RefactorAsync(context.Document, memberDeclaration, overrideInfo, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.MarkFieldAsReadOnly:
{
var fieldDeclaration = (FieldDeclarationSyntax)memberDeclaration;
SeparatedSyntaxList <VariableDeclaratorSyntax> declarators = fieldDeclaration.Declaration.Variables;
string title = (declarators.Count == 1)
? $"Mark '{declarators[0].Identifier.ValueText}' as read-only"
: "Mark fields as read-only";
CodeAction codeAction = CodeAction.Create(
title,
cancellationToken => MarkFieldAsReadOnlyRefactoring.RefactorAsync(context.Document, fieldDeclaration, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.UseReadOnlyAutoProperty:
{
CodeAction codeAction = CodeAction.Create(
"Use read-only auto-property",
cancellationToken => UseReadOnlyAutoPropertyRefactoring.RefactorAsync(context.Document, (PropertyDeclarationSyntax)memberDeclaration, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.ReplaceCommentWithDocumentationComment:
{
CodeAction codeAction = CodeAction.Create(
"Replace comment with documentation comment",
cancellationToken => ReplaceCommentWithDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
}
}