private static void AnalyzeFieldDeclaration(SyntaxNodeAnalysisContext context)
{
if (context.Node.ContainsDiagnostics)
{
return;
}
if (context.Node.SpanContainsDirectives())
{
return;
}
var fieldDeclaration = (FieldDeclarationSyntax)context.Node;
if (UseConstantInsteadOfFieldRefactoring.CanRefactor(fieldDeclaration, context.SemanticModel, context.CancellationToken))
{
context.ReportDiagnostic(DiagnosticDescriptors.UseConstantInsteadOfField, fieldDeclaration);
}
}
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 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.RemoveRedundantOverridingMember:
{
CodeAction codeAction = CodeActionFactory.RemoveMemberDeclaration(context.Document, memberDeclaration, equivalenceKey: GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.AddAccessibilityModifiersOrViceVersa:
{
if (diagnostic.Properties.TryGetValue(nameof(Accessibility), out string accessibilityText))
{
var accessibility = (Accessibility)Enum.Parse(typeof(Accessibility), accessibilityText);
CodeAction codeAction = CodeAction.Create(
"Add accessibility modifiers",
ct =>
{
MemberDeclarationSyntax newNode = SyntaxAccessibility.WithExplicitAccessibility(memberDeclaration, accessibility);
return(context.Document.ReplaceNodeAsync(memberDeclaration, newNode, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
else
{
CodeAction codeAction = CodeAction.Create(
"Remove accessibility modifiers",
ct =>
{
MemberDeclarationSyntax newNode = SyntaxAccessibility.WithoutExplicitAccessibility(memberDeclaration);
return(context.Document.ReplaceNodeAsync(memberDeclaration, newNode, ct));
},
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.OrderModifiers:
{
CodeAction codeAction = CodeAction.Create(
"Order modifiers",
ct => OrderModifiersAsync(context.Document, memberDeclaration, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.MakeFieldReadOnly:
{
var fieldDeclaration = (FieldDeclarationSyntax)memberDeclaration;
SeparatedSyntaxList <VariableDeclaratorSyntax> declarators = fieldDeclaration.Declaration.Variables;
string title = (declarators.Count == 1)
? $"Make '{declarators[0].Identifier.ValueText}' read-only"
: "Make fields 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 => UseReadOnlyAutoPropertyAsync(context.Document, (PropertyDeclarationSyntax)memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.ConvertCommentToDocumentationComment:
{
CodeAction codeAction = CodeAction.Create(
ConvertCommentToDocumentationCommentRefactoring.Title,
cancellationToken => ConvertCommentToDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, context.Span, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.MakeMethodExtensionMethod:
{
var methodDeclaration = (MethodDeclarationSyntax)memberDeclaration;
CodeAction codeAction = CodeAction.Create(
"Make method an extension method",
cancellationToken =>
{
ParameterSyntax parameter = methodDeclaration.ParameterList.Parameters[0];
ParameterSyntax newParameter = ModifierList.Insert(parameter, SyntaxKind.ThisKeyword);
return(context.Document.ReplaceNodeAsync(parameter, newParameter, cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
}
}
