public override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var(document, _, cancellationToken) = context;
var declaration = await context.TryGetRelevantNodeAsync <TLocalDeclaration>().ConfigureAwait(false);
if (declaration == null)
{
return;
}
var syntaxFacts = document.GetRequiredLanguageService <ISyntaxFactsService>();
var variables = syntaxFacts.GetVariablesOfLocalDeclarationStatement(declaration);
if (variables.Count != 1)
{
return;
}
var service = document.GetRequiredLanguageService <IMoveDeclarationNearReferenceService>();
if (!await service.CanMoveDeclarationNearReferenceAsync(document, declaration, cancellationToken).ConfigureAwait(false))
{
return;
}
context.RegisterRefactoring(
CodeAction.CreateWithPriority(
CodeActionPriority.Low,
FeaturesResources.Move_declaration_near_reference,
c => MoveDeclarationNearReferenceAsync(document, declaration, c),
nameof(FeaturesResources.Move_declaration_near_reference)),
declaration.Span);
}
public override Task RegisterCodeFixesAsync(CodeFixContext context)
{
context.RegisterCodeFix(
CodeAction.CreateWithPriority(
CodeActionPriority.Low,
CSharpAnalyzersResources.Use_pattern_matching,
GetDocumentUpdater(context),
nameof(CSharpAnalyzersResources.Use_pattern_matching)),
context.Diagnostics);
return(Task.CompletedTask);
}
private async Task CheckItemsAsync(
CodeFixContext context, SyntaxToken nameToken, bool isGeneric,
CompletionList completionList, WordSimilarityChecker similarityChecker)
{
var document = context.Document;
var cancellationToken = context.CancellationToken;
var onlyConsiderGenerics = isGeneric;
var results = new MultiDictionary <double, string>();
foreach (var item in completionList.ItemsList)
{
if (onlyConsiderGenerics && !IsGeneric(item))
{
continue;
}
var candidateText = item.FilterText;
if (!similarityChecker.AreSimilar(candidateText, out var matchCost))
{
continue;
}
var insertionText = await GetInsertionTextAsync(document, item, cancellationToken : cancellationToken).ConfigureAwait(false);
results.Add(matchCost, insertionText);
}
var nameText = nameToken.ValueText;
var codeActions = results.OrderBy(kvp => kvp.Key)
.SelectMany(kvp => kvp.Value.Order())
.Where(t => t != nameText)
.Take(3)
.Select(n => CreateCodeAction(nameToken, nameText, n, document))
.ToImmutableArrayOrEmpty <CodeAction>();
if (codeActions.Length > 1)
{
// Wrap the spell checking actions into a single top level suggestion
// so as to not clutter the list.
context.RegisterCodeFix(
CodeAction.CreateWithPriority(
CodeActionPriority.Low,
string.Format(FeaturesResources.Fix_typo_0, nameText),
codeActions,
isInlinable: true),
context.Diagnostics);
}
else
{
context.RegisterFixes(codeActions, context.Diagnostics);
}
}
public sealed override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var literalExpression = await context.TryGetRelevantNodeAsync <TStringExpressionSyntax>().ConfigureAwait(false);
if (literalExpression == null || !IsAppropriateLiteralKind(literalExpression))
{
return;
}
var(document, _, cancellationToken) = context;
var charService = document.GetRequiredLanguageService <IVirtualCharLanguageService>();
using var _ = ArrayBuilder <SyntaxToken> .GetInstance(out var subStringTokens);
// First, ensure that we understand all text parts of the interpolation.
AddSubStringTokens(literalExpression, subStringTokens);
foreach (var subToken in subStringTokens)
{
var chars = charService.TryConvertToVirtualChars(subToken);
if (chars.IsDefault)
{
return;
}
}
// Note: This is a generally useful feature on strings. But it's not likely to be something
// people want to use a lot. Make low priority so it doesn't interfere with more
// commonly useful refactorings.
if (IsVerbatim(literalExpression))
{
// always offer to convert from verbatim string to normal string.
context.RegisterRefactoring(CodeAction.CreateWithPriority(
CodeActionPriority.Low,
CSharpFeaturesResources.Convert_to_regular_string,
c => ConvertToRegularStringAsync(document, literalExpression, c),
nameof(CSharpFeaturesResources.Convert_to_regular_string)));
}
else if (ContainsSimpleEscape(charService, subStringTokens))
{
// Offer to convert to a verbatim string if the normal string contains simple
// escapes that can be directly embedded in the verbatim string.
context.RegisterRefactoring(CodeAction.CreateWithPriority(
CodeActionPriority.Low,
CSharpFeaturesResources.Convert_to_verbatim_string,
c => ConvertToVerbatimStringAsync(document, literalExpression, c),
nameof(CSharpFeaturesResources.Convert_to_verbatim_string)));
}
}
public override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var(document, span, cancellationToken) = context;
if (!span.IsEmpty)
{
return;
}
if (!IsApplication(document.Project.CompilationOptions !))
{
return;
}
var position = span.Start;
var root = (CompilationUnitSyntax)await document.GetRequiredSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
if (!root.IsTopLevelProgram())
{
return;
}
var acceptableLocation = GetUseProgramMainDiagnosticLocation(root, isHidden: true);
if (!acceptableLocation.SourceSpan.IntersectsWith(position))
{
return;
}
var optionSet = await document.GetOptionsAsync(cancellationToken).ConfigureAwait(false);
var option = optionSet.GetOption(CSharpCodeStyleOptions.PreferTopLevelStatements);
var compilation = await document.Project.GetRequiredCompilationAsync(cancellationToken).ConfigureAwait(false);
if (!CanOfferUseProgramMain(option, root, compilation, forAnalyzer: false))
{
return;
}
context.RegisterRefactoring(CodeAction.CreateWithPriority(
CodeActionPriority.Low,
CSharpAnalyzersResources.Convert_to_Program_Main_style_program,
c => ConvertToProgramMainAsync(document, c),
nameof(CSharpAnalyzersResources.Convert_to_Program_Main_style_program)));
}
public override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var(document, _, cancellationToken) = context;
var typeAndPriority =
await GetRelevantTypeFromHeaderAsync(context).ConfigureAwait(false) ??
await GetRelevantTypeFromMethodAsync(context).ConfigureAwait(false);
if (typeAndPriority == null)
{
return;
}
var(type, priority) = typeAndPriority.Value;
var semanticModel = await document.GetRequiredSemanticModelAsync(cancellationToken).ConfigureAwait(false);
var compilation = semanticModel.Compilation;
var debuggerAttributeTypeSymbol = compilation.GetTypeByMetadataName("System.Diagnostics.DebuggerDisplayAttribute");
if (debuggerAttributeTypeSymbol is null)
{
return;
}
var typeSymbol = (INamedTypeSymbol)semanticModel.GetRequiredDeclaredSymbol(type, context.CancellationToken);
if (typeSymbol.IsStatic || !IsClassOrStruct(typeSymbol))
{
return;
}
if (HasDebuggerDisplayAttribute(typeSymbol, compilation))
{
return;
}
context.RegisterRefactoring(CodeAction.CreateWithPriority(
priority,
FeaturesResources.Add_DebuggerDisplay_attribute,
c => ApplyAsync(document, type, debuggerAttributeTypeSymbol, c),
nameof(FeaturesResources.Add_DebuggerDisplay_attribute)));
}
public override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var(document, span, cancellationToken) = context;
// can only suggest moving to top level statement on c# 9 or above.
if (document.Project.ParseOptions !.LanguageVersion() < LanguageVersion.CSharp9 ||
!IsApplication(document.Project.CompilationOptions !))
{
return;
}
var methodDeclaration = await context.TryGetRelevantNodeAsync <MethodDeclarationSyntax>().ConfigureAwait(false);
if (methodDeclaration is null)
{
return;
}
var options = await document.GetOptionsAsync(cancellationToken).ConfigureAwait(false);
var option = options.GetOption(CSharpCodeStyleOptions.PreferTopLevelStatements);
if (!CanOfferUseTopLevelStatements(option, forAnalyzer: false))
{
return;
}
var semanticModel = await document.GetRequiredSemanticModelAsync(cancellationToken).ConfigureAwait(false);
var compilation = semanticModel.Compilation;
if (!IsProgramMainMethod(semanticModel, methodDeclaration, GetMainTypeName(compilation), cancellationToken, out var canConvert) ||
!canConvert)
{
return;
}
context.RegisterRefactoring(CodeAction.CreateWithPriority(
CodeActionPriority.Low,
CSharpAnalyzersResources.Convert_to_top_level_statements,
c => ConvertToTopLevelStatementsAsync(document, methodDeclaration, context.Options, c),
nameof(CSharpAnalyzersResources.Convert_to_top_level_statements)));
}
public override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var(document, _, cancellationToken) = context;
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
if (root is null)
{
return;
}
var token = root.FindToken(context.Span.Start);
if (!context.Span.IntersectsWith(token.Span))
{
return;
}
var syntaxKinds = document.GetRequiredLanguageService <ISyntaxKindsService>();
if (token.RawKind != syntaxKinds.StringLiteralToken)
{
return;
}
var literalExpression = token.GetRequiredParent();
// Check the string literal for errors. This will ensure that we do not try to fixup an incomplete string.
if (literalExpression.GetDiagnostics().Any(d => d.Severity == DiagnosticSeverity.Error))
{
return;
}
if (!token.Text.Contains('{') && !token.Text.Contains('}'))
{
return;
}
var syntaxFacts = document.GetRequiredLanguageService <ISyntaxFactsService>();
if (!syntaxFacts.SupportsConstantInterpolatedStrings(document.Project.ParseOptions !))
{
// If there is a const keyword, do not offer the refactoring (an interpolated string is not const)
var declarator = literalExpression.FirstAncestorOrSelf <SyntaxNode>(syntaxFacts.IsVariableDeclarator);
if (declarator != null)
{
var generator = SyntaxGenerator.GetGenerator(document);
if (generator.GetModifiers(declarator).IsConst)
{
return;
}
}
// Attributes also only allow constant values.
var attribute = literalExpression.FirstAncestorOrSelf <SyntaxNode>(syntaxFacts.IsAttribute);
if (attribute != null)
{
return;
}
}
context.RegisterRefactoring(
CodeAction.CreateWithPriority(
CodeActionPriority.Low,
FeaturesResources.Convert_to_interpolated_string,
_ => UpdateDocumentAsync(document, root, token),
nameof(FeaturesResources.Convert_to_interpolated_string)),
literalExpression.Span);
}