public static async Task ComputeRefactoringsAsync(RefactoringContext context, BinaryExpressionSyntax binaryExpression)
        {
            if (context.IsRefactoringEnabled(RefactoringIdentifiers.NegateOperator))
            {
                SyntaxToken operatorToken = binaryExpression.OperatorToken;

                if (operatorToken.Span.Contains(context.Span) &&
                    NegateOperatorRefactoring.CanBeNegated(operatorToken))
                {
                    context.RegisterRefactoring(
                        "Negate operator",
                        cancellationToken => NegateOperatorRefactoring.RefactorAsync(context.Document, operatorToken, cancellationToken));
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.FormatBinaryExpression))
            {
                FormatBinaryExpressionRefactoring.ComputeRefactorings(context, binaryExpression);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.NegateBinaryExpression))
            {
                NegateBinaryExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.ExpandCoalesceExpression) &&
                binaryExpression.OperatorToken.Span.Contains(context.Span))
            {
                ExpandCoalesceExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.IsAnyRefactoringEnabled(
                    RefactoringIdentifiers.JoinStringExpressions,
                    RefactoringIdentifiers.UseStringBuilderInsteadOfConcatenation) &&
                context.Span.IsBetweenSpans(binaryExpression) &&
                binaryExpression.IsKind(SyntaxKind.AddExpression))
            {
                SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);

                StringConcatenationExpressionInfo concatenationInfo = SyntaxInfo.StringConcatenationExpressionInfo(binaryExpression, semanticModel, context.CancellationToken);
                if (concatenationInfo.Success)
                {
                    if (context.IsRefactoringEnabled(RefactoringIdentifiers.JoinStringExpressions))
                    {
                        JoinStringExpressionsRefactoring.ComputeRefactoring(context, concatenationInfo);
                    }

                    if (context.IsRefactoringEnabled(RefactoringIdentifiers.UseStringBuilderInsteadOfConcatenation))
                    {
                        UseStringBuilderInsteadOfConcatenationRefactoring.ComputeRefactoring(context, concatenationInfo);
                    }
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.SwapExpressionsInBinaryExpression) &&
                context.Span.IsBetweenSpans(binaryExpression))
            {
                SwapExpressionsInBinaryExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.ReplaceAsWithCast) &&
                context.Span.IsEmptyAndContainedInSpanOrBetweenSpans(binaryExpression))
            {
                SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);

                if (ReplaceAsWithCastRefactoring.CanRefactor(binaryExpression, semanticModel, context.CancellationToken))
                {
                    context.RegisterRefactoring(
                        "Replace as with cast",
                        cancellationToken => ReplaceAsWithCastRefactoring.RefactorAsync(context.Document, binaryExpression, cancellationToken));
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.NegateIsExpression))
            {
                NegateIsExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.Span.IsContainedInSpanOrBetweenSpans(binaryExpression.OperatorToken))
            {
                if (context.IsRefactoringEnabled(RefactoringIdentifiers.ReplaceEqualsExpressionWithStringEquals))
                {
                    await ReplaceEqualsExpressionWithStringEqualsRefactoring.ComputeRefactoringAsync(context, binaryExpression).ConfigureAwait(false);
                }

                if (context.IsAnyRefactoringEnabled(
                        RefactoringIdentifiers.ReplaceEqualsExpressionWithStringIsNullOrEmpty,
                        RefactoringIdentifiers.ReplaceEqualsExpressionWithStringIsNullOrWhiteSpace))
                {
                    await ReplaceEqualsExpressionRefactoring.ComputeRefactoringsAsync(context, binaryExpression).ConfigureAwait(false);
                }
            }

            if (!context.Span.IsBetweenSpans(binaryExpression) &&
                context.IsAnyRefactoringEnabled(
                    RefactoringIdentifiers.ExtractExpressionFromCondition,
                    RefactoringIdentifiers.JoinStringExpressions))
            {
                BinaryExpressionSelection binaryExpressionSelection = BinaryExpressionSelection.Create(binaryExpression, context.Span);

                if (binaryExpressionSelection.Expressions.Length > 1)
                {
                    if (context.IsRefactoringEnabled(RefactoringIdentifiers.ExtractExpressionFromCondition))
                    {
                        ExtractConditionRefactoring.ComputeRefactoring(context, binaryExpressionSelection);
                    }

                    if (context.IsRefactoringEnabled(RefactoringIdentifiers.JoinStringExpressions) &&
                        binaryExpression.IsKind(SyntaxKind.AddExpression))
                    {
                        SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);

                        StringConcatenationExpressionInfo concatenation = SyntaxInfo.StringConcatenationExpressionInfo(binaryExpressionSelection, semanticModel, context.CancellationToken);
                        if (concatenation.Success)
                        {
                            JoinStringExpressionsRefactoring.ComputeRefactoring(context, concatenation);
                        }
                    }
                }
            }
        }
Beispiel #2
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        public static async Task ComputeRefactoringsAsync(RefactoringContext context, BinaryExpressionSyntax binaryExpression)
        {
            if (context.IsRefactoringEnabled(RefactoringIdentifiers.NegateOperator))
            {
                SyntaxToken operatorToken = binaryExpression.OperatorToken;

                if (operatorToken.Span.Contains(context.Span) &&
                    NegateOperatorRefactoring.CanBeNegated(operatorToken))
                {
                    context.RegisterRefactoring(
                        "Negate operator",
                        cancellationToken => NegateOperatorRefactoring.RefactorAsync(context.Document, operatorToken, cancellationToken));
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.AddBooleanComparison) &&
                binaryExpression.IsKind(SyntaxKind.LogicalAndExpression, SyntaxKind.LogicalOrExpression) &&
                binaryExpression.Left?.IsMissing == false &&
                binaryExpression.Right?.IsMissing == false &&
                context.SupportsSemanticModel)
            {
                if (binaryExpression.Left.Span.Contains(context.Span))
                {
                    await AddBooleanComparisonRefactoring.ComputeRefactoringAsync(context, binaryExpression.Left).ConfigureAwait(false);
                }
                else if (binaryExpression.Right.Span.Contains(context.Span))
                {
                    await AddBooleanComparisonRefactoring.ComputeRefactoringAsync(context, binaryExpression.Right).ConfigureAwait(false);
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.FormatBinaryExpression))
            {
                FormatBinaryExpressionRefactoring.ComputeRefactorings(context, binaryExpression);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.NegateBinaryExpression))
            {
                NegateBinaryExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.ExpandCoalesceExpression) &&
                binaryExpression.OperatorToken.Span.Contains(context.Span) &&
                ExpandCoalesceExpressionRefactoring.CanRefactor(binaryExpression))
            {
                context.RegisterRefactoring(
                    "Expand ??",
                    cancellationToken =>
                {
                    return(ExpandCoalesceExpressionRefactoring.RefactorAsync(
                               context.Document,
                               binaryExpression,
                               cancellationToken));
                });
            }

            if (context.IsAnyRefactoringEnabled(
                    RefactoringIdentifiers.MergeStringLiterals,
                    RefactoringIdentifiers.MergeStringLiteralsIntoMultilineStringLiteral) &&
                MergeStringLiteralsRefactoring.CanRefactor(context, binaryExpression))
            {
                if (context.IsRefactoringEnabled(RefactoringIdentifiers.MergeStringLiterals))
                {
                    context.RegisterRefactoring(
                        "Merge string literals",
                        cancellationToken => MergeStringLiteralsRefactoring.RefactorAsync(context.Document, binaryExpression, cancellationToken: cancellationToken));
                }

                if (context.IsRefactoringEnabled(RefactoringIdentifiers.MergeStringLiteralsIntoMultilineStringLiteral) &&
                    binaryExpression
                    .DescendantTrivia(binaryExpression.Span)
                    .Any(f => f.IsKind(SyntaxKind.EndOfLineTrivia)))
                {
                    context.RegisterRefactoring(
                        "Merge string literals into multiline string literal",
                        cancellationToken => MergeStringLiteralsRefactoring.RefactorAsync(context.Document, binaryExpression, multiline: true, cancellationToken: cancellationToken));
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.SwapExpressionsInBinaryExpression) &&
                SwapExpressionsRefactoring.CanRefactor(binaryExpression) &&
                context.Span.IsBetweenSpans(binaryExpression))
            {
                context.RegisterRefactoring(
                    "Swap expressions",
                    cancellationToken =>
                {
                    return(SwapExpressionsRefactoring.RefactorAsync(
                               context.Document,
                               binaryExpression,
                               cancellationToken));
                });
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.ReplaceAsWithCast))
            {
                ReplaceAsWithCastRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.Span.IsContainedInSpanOrBetweenSpans(binaryExpression.OperatorToken) &&
                context.IsAnyRefactoringEnabled(
                    RefactoringIdentifiers.ReplaceEqualsExpressionWithStringEquals,
                    RefactoringIdentifiers.ReplaceEqualsExpressionWithStringIsNullOrWhiteSpace))
            {
                await ReplaceEqualsExpressionRefactoring.ComputeRefactoringsAsync(context, binaryExpression).ConfigureAwait(false);
            }
        }
        public static async Task ComputeRefactoringsAsync(RefactoringContext context, BinaryExpressionSyntax binaryExpression)
        {
            SyntaxToken operatorToken = binaryExpression.OperatorToken;

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.NegateOperator) &&
                context.Span.IsEmptyAndContainedInSpanOrBetweenSpans(operatorToken) &&
                NegateOperatorRefactoring.CanBeNegated(operatorToken))
            {
                context.RegisterRefactoring(
                    "Negate operator",
                    cancellationToken => NegateOperatorRefactoring.RefactorAsync(context.Document, operatorToken, cancellationToken),
                    RefactoringIdentifiers.NegateOperator);
            }

            if (context.Span.IsEmptyAndContainedInSpan(operatorToken))
            {
                if (context.IsRefactoringEnabled(RefactoringIdentifiers.NegateBinaryExpression))
                {
                    NegateBinaryExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
                }

                if (context.IsRefactoringEnabled(RefactoringIdentifiers.SwapBinaryOperands))
                {
                    SwapBinaryOperandsRefactoring.ComputeRefactoring(context, binaryExpression);
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.FormatBinaryExpression))
            {
                FormatBinaryExpressionRefactoring.ComputeRefactorings(context, binaryExpression);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.ExpandCoalesceExpression) &&
                operatorToken.Span.Contains(context.Span))
            {
                ExpandCoalesceExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.IsAnyRefactoringEnabled(
                    RefactoringIdentifiers.ExtractExpressionFromCondition,
                    RefactoringIdentifiers.JoinStringExpressions,
                    RefactoringIdentifiers.UseStringBuilderInsteadOfConcatenation) &&
                !context.Span.IsEmpty &&
                binaryExpression.IsKind(SyntaxKind.AddExpression, SyntaxKind.LogicalAndExpression, SyntaxKind.LogicalOrExpression))
            {
                ExpressionChain chain = binaryExpression.AsChain(context.Span);

                ExpressionChain.Enumerator en = chain.GetEnumerator();

                if (en.MoveNext() &&
                    en.MoveNext())
                {
                    if (context.IsRefactoringEnabled(RefactoringIdentifiers.ExtractExpressionFromCondition))
                    {
                        ExtractConditionRefactoring.ComputeRefactoring(context, chain);
                    }

                    if (binaryExpression.IsKind(SyntaxKind.AddExpression))
                    {
                        SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);

                        StringConcatenationExpressionInfo concatenationInfo = SyntaxInfo.StringConcatenationExpressionInfo(chain, semanticModel, context.CancellationToken);
                        if (concatenationInfo.Success)
                        {
                            if (context.IsRefactoringEnabled(RefactoringIdentifiers.JoinStringExpressions))
                            {
                                JoinStringExpressionsRefactoring.ComputeRefactoring(context, concatenationInfo);
                            }

                            if (context.IsRefactoringEnabled(RefactoringIdentifiers.UseStringBuilderInsteadOfConcatenation))
                            {
                                UseStringBuilderInsteadOfConcatenationRefactoring.ComputeRefactoring(context, concatenationInfo);
                            }
                        }
                    }
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.ReplaceAsWithCast) &&
                context.Span.IsEmptyAndContainedInSpanOrBetweenSpans(binaryExpression))
            {
                SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);

                if (ReplaceAsWithCastAnalysis.IsFixable(binaryExpression, semanticModel, context.CancellationToken))
                {
                    context.RegisterRefactoring(
                        "Replace as with cast",
                        cancellationToken => ReplaceAsWithCastRefactoring.RefactorAsync(context.Document, binaryExpression, cancellationToken),
                        RefactoringIdentifiers.ReplaceAsWithCast);
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.NegateIsExpression))
            {
                NegateIsExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.Span.IsContainedInSpanOrBetweenSpans(operatorToken))
            {
                if (context.IsRefactoringEnabled(RefactoringIdentifiers.ReplaceEqualsExpressionWithStringEquals))
                {
                    await ReplaceEqualsExpressionWithStringEqualsRefactoring.ComputeRefactoringAsync(context, binaryExpression).ConfigureAwait(false);
                }

                if (context.IsAnyRefactoringEnabled(
                        RefactoringIdentifiers.ReplaceEqualsExpressionWithStringIsNullOrEmpty,
                        RefactoringIdentifiers.ReplaceEqualsExpressionWithStringIsNullOrWhiteSpace))
                {
                    await ReplaceEqualsExpressionRefactoring.ComputeRefactoringsAsync(context, binaryExpression).ConfigureAwait(false);
                }
            }
        }
        public static async Task ComputeRefactoringsAsync(RefactoringContext context, BinaryExpressionSyntax binaryExpression)
        {
            if (context.IsRefactoringEnabled(RefactoringIdentifiers.NegateOperator))
            {
                SyntaxToken operatorToken = binaryExpression.OperatorToken;

                if (operatorToken.Span.Contains(context.Span) &&
                    NegateOperatorRefactoring.CanBeNegated(operatorToken))
                {
                    context.RegisterRefactoring(
                        "Negate operator",
                        cancellationToken => NegateOperatorRefactoring.RefactorAsync(context.Document, operatorToken, cancellationToken));
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.FormatBinaryExpression))
            {
                FormatBinaryExpressionRefactoring.ComputeRefactorings(context, binaryExpression);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.NegateBinaryExpression))
            {
                NegateBinaryExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.ExpandCoalesceExpression) &&
                binaryExpression.OperatorToken.Span.Contains(context.Span))
            {
                ExpandCoalesceExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.MergeStringExpressions) &&
                context.Span.IsBetweenSpans(binaryExpression))
            {
                await MergeStringExpressionsRefactoring.ComputeRefactoringAsync(context, binaryExpression).ConfigureAwait(false);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.SwapExpressionsInBinaryExpression) &&
                context.Span.IsBetweenSpans(binaryExpression))
            {
                SwapExpressionsInBinaryExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.ReplaceAsWithCast) &&
                context.Span.IsEmptyAndContainedInSpanOrBetweenSpans(binaryExpression))
            {
                ReplaceAsWithCastRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.NegateIsExpression))
            {
                NegateIsExpressionRefactoring.ComputeRefactoring(context, binaryExpression);
            }

            if (context.Span.IsContainedInSpanOrBetweenSpans(binaryExpression.OperatorToken))
            {
                if (context.IsRefactoringEnabled(RefactoringIdentifiers.ReplaceEqualsExpressionWithStringEquals))
                {
                    await ReplaceEqualsExpressionWithStringEqualsRefactoring.ComputeRefactoringAsync(context, binaryExpression).ConfigureAwait(false);
                }

                if (context.IsAnyRefactoringEnabled(
                        RefactoringIdentifiers.ReplaceEqualsExpressionWithStringIsNullOrEmpty,
                        RefactoringIdentifiers.ReplaceEqualsExpressionWithStringIsNullOrWhiteSpace))
                {
                    await ReplaceEqualsExpressionRefactoring.ComputeRefactoringsAsync(context, binaryExpression).ConfigureAwait(false);
                }
            }

            if (!context.Span.IsBetweenSpans(binaryExpression) &&
                context.IsAnyRefactoringEnabled(
                    RefactoringIdentifiers.ExtractExpressionFromCondition,
                    RefactoringIdentifiers.MergeStringExpressions))
            {
                SelectedExpressions selectedExpressions = SelectedExpressions.TryCreate(binaryExpression, context.Span);

                if (selectedExpressions?.Expressions.Length > 1)
                {
                    if (context.IsRefactoringEnabled(RefactoringIdentifiers.ExtractExpressionFromCondition))
                    {
                        ExtractConditionRefactoring.ComputeRefactoring(context, selectedExpressions);
                    }

                    if (context.IsRefactoringEnabled(RefactoringIdentifiers.MergeStringExpressions))
                    {
                        await MergeStringExpressionsRefactoring.ComputeRefactoringAsync(context, selectedExpressions).ConfigureAwait(false);
                    }
                }
            }
        }