private static Task <Document> RefactorAsync(
Document document,
StatementsInfo statementsInfo,
LocalDeclarationStatementSyntax[] localDeclarations,
CancellationToken cancellationToken = default(CancellationToken))
{
LocalDeclarationStatementSyntax localDeclaration = localDeclarations[0];
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
int index = statements.IndexOf(localDeclaration);
VariableDeclaratorSyntax[] variables = localDeclarations
.Skip(1)
.Select(f => f.Declaration)
.SelectMany(f => f.Variables)
.ToArray();
LocalDeclarationStatementSyntax newLocalDeclaration = localDeclaration
.AddDeclarationVariables(variables)
.WithTrailingTrivia(localDeclarations[localDeclarations.Length - 1].GetTrailingTrivia())
.WithFormatterAnnotation();
SyntaxList <StatementSyntax> newStatements = statements.Replace(
localDeclaration,
newLocalDeclaration);
for (int i = 1; i < localDeclarations.Length; i++)
{
newStatements = newStatements.RemoveAt(index + 1);
}
return(document.ReplaceStatementsAsync(statementsInfo, newStatements, cancellationToken));
}
public static Task <Document> RefactorAsync(
Document document,
AssignmentExpressionSyntax assignmentExpression,
CancellationToken cancellationToken)
{
var statement = (StatementSyntax)assignmentExpression.Parent;
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(statement);
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
int index = statements.IndexOf(statement);
statements = statements.RemoveAt(index);
var returnStatement = (ReturnStatementSyntax)statement.NextStatementOrDefault();
IEnumerable <SyntaxTrivia> trivia = statementsInfo
.Node
.DescendantTrivia(TextSpan.FromBounds(statement.SpanStart, returnStatement.SpanStart))
.Where(f => !f.IsWhitespaceOrEndOfLineTrivia());
trivia = statement
.GetLeadingTrivia()
.Concat(trivia);
returnStatement = returnStatement
.WithExpression(assignmentExpression.Right.WithTriviaFrom(returnStatement.Expression))
.WithLeadingTrivia(trivia);
statements = statements.ReplaceAt(index, returnStatement);
return(document.ReplaceStatementsAsync(statementsInfo, statements, cancellationToken));
}
public static Task <Document> RefactorAsync(
Document document,
LocalFunctionStatementSyntax localFunction,
CancellationToken cancellationToken = default(CancellationToken))
{
if (document == null)
{
throw new ArgumentNullException(nameof(document));
}
if (localFunction == null)
{
throw new ArgumentNullException(nameof(localFunction));
}
StatementsInfo statementsInfos = SyntaxInfo.StatementsInfo(localFunction);
SyntaxList <StatementSyntax> statements = statementsInfos.Statements;
int index = statements.IndexOf(localFunction);
if (index == 0 &&
statementsInfos.Block.OpenBraceToken.GetFullSpanEndLine() == localFunction.GetFullSpanStartLine())
{
localFunction = localFunction.WithLeadingTrivia(localFunction.GetLeadingTrivia().Insert(0, NewLine()));
}
SyntaxList <StatementSyntax> newStatements = statements.Insert(index + 1, localFunction.WithNavigationAnnotation());
return(document.ReplaceStatementsAsync(statementsInfos, newStatements, cancellationToken));
}
public static bool TryCreate(StatementsInfo statementsInfo, TextSpan span, out StatementsSelection selectedStatements)
{
selectedStatements = null;
if (span.IsEmpty)
{
return(false);
}
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
if (!statements.Any())
{
return(false);
}
(int startIndex, int endIndex) = GetIndexes(statements, span);
if (startIndex == -1)
{
return(false);
}
selectedStatements = new StatementsSelection(statementsInfo, span, startIndex, endIndex);
return(true);
}
public static Task <Document> RefactorAsync(
Document document,
StatementsInfo statementsInfo,
ImmutableArray <IfStatementSyntax> ifStatements,
CancellationToken cancellationToken = default(CancellationToken))
{
IfStatementSyntax newIfStatement = IfStatement(
CreateCondition(ifStatements),
Block(CreateStatements(ifStatements)));
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
int index = statements.IndexOf(ifStatements[0]);
SyntaxList <StatementSyntax> newStatements = statements.Replace(
ifStatements[0],
newIfStatement
.WithLeadingTrivia(ifStatements[0].GetLeadingTrivia())
.WithTrailingTrivia(ifStatements[ifStatements.Length - 1].GetTrailingTrivia()));
for (int i = 1; i < ifStatements.Length; i++)
{
newStatements = newStatements.RemoveAt(index + 1);
}
return(document.ReplaceStatementsAsync(statementsInfo, newStatements, cancellationToken));
}
public static Task <Document> RefactorAsync(
Document document,
UsingStatementSyntax usingStatement,
CancellationToken cancellationToken = default(CancellationToken))
{
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(usingStatement);
int index = statementsInfo.Statements.IndexOf(usingStatement);
StatementsInfo newStatementsInfo = statementsInfo.RemoveAt(index);
var statements = new List <StatementSyntax>()
{
SyntaxFactory.LocalDeclarationStatement(usingStatement.Declaration)
};
statements.AddRange(GetStatements(usingStatement));
if (statements.Count > 0)
{
statements[0] = statements[0]
.WithLeadingTrivia(usingStatement.GetLeadingTrivia());
statements[statements.Count - 1] = statements[statements.Count - 1]
.WithTrailingTrivia(usingStatement.GetTrailingTrivia());
}
newStatementsInfo = newStatementsInfo.WithStatements(newStatementsInfo.Statements.InsertRange(index, statements));
return(document.ReplaceNodeAsync(statementsInfo.Node, newStatementsInfo.Node.WithFormatterAnnotation(), cancellationToken));
}
private static Task <Document> RefactorAsync(
Document document,
ExpressionSyntax expression,
SyntaxList <StatementSyntax> statements,
StatementsInfo statementsInfo,
int statementIndex,
int lastStatementIndex,
CancellationToken cancellationToken)
{
IEnumerable <StatementSyntax> blockStatements = statements
.Skip(statementIndex + 1)
.Take(lastStatementIndex - statementIndex);
IfStatementSyntax ifStatement = CreateNullCheck(expression, List(blockStatements));
if (lastStatementIndex < statements.Count - 1)
{
ifStatement = ifStatement.AppendToTrailingTrivia(NewLine());
}
IEnumerable <StatementSyntax> newStatements = statements.Take(statementIndex + 1)
.Concat(new IfStatementSyntax[] { ifStatement })
.Concat(statements.Skip(lastStatementIndex + 1));
return(document.ReplaceStatementsAsync(statementsInfo, newStatements, cancellationToken));
}
private static Task <Document> RefactorAsync(
Document document,
SingleLocalDeclarationStatementInfo localInfo,
SemanticModel semanticModel,
CancellationToken cancellationToken)
{
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(localInfo.Statement);
var localSymbol = (ILocalSymbol)semanticModel.GetDeclaredSymbol(localInfo.Declarator, cancellationToken);
IdentifierNameSyntax identifierName = FindLastReference(localSymbol, statementsInfo.Node, semanticModel, cancellationToken);
TextSpan span;
if (identifierName == null)
{
span = localInfo.Statement.Span;
}
else
{
int position = identifierName.SpanStart;
span = TextSpan.FromBounds(localInfo.Statement.SpanStart, statementsInfo.First(f => f.Span.Contains(position)).Span.End);
}
StatementsSelection selectedStatements = StatementsSelection.Create(statementsInfo, span);
var refactoring = new WrapStatements.WrapInUsingStatementRefactoring();
return(refactoring.RefactorAsync(document, selectedStatements, cancellationToken));
}
private static bool NullCheckExists(ExpressionSyntax expression, StatementSyntax statement)
{
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(statement);
if (!statementsInfo.Success)
{
return(false);
}
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
int index = statements.IndexOf(statement);
if (index >= statements.Count - 1)
{
return(false);
}
StatementSyntax nextStatement = statements[index + 1];
if (!(nextStatement is IfStatementSyntax ifStatement))
{
return(false);
}
NullCheckExpressionInfo nullCheck = SyntaxInfo.NullCheckExpressionInfo(ifStatement.Condition, NullCheckKind.NotEqualsToNull);
if (!nullCheck.Success)
{
return(false);
}
return(SyntaxComparer.AreEquivalent(expression, nullCheck.Expression));
}
public static Task <Document> RefactorAsync(
Document document,
ObjectCreationExpressionSyntax objectCreation,
StatementsSelection selectedStatements,
CancellationToken cancellationToken = default(CancellationToken))
{
StatementsInfo statementsInfo = selectedStatements.Info;
ExpressionStatementSyntax[] expressionStatements = selectedStatements
.Skip(1)
.Cast <ExpressionStatementSyntax>()
.ToArray();
StatementSyntax firstStatement = selectedStatements.First();
SyntaxList <StatementSyntax> newStatements = statementsInfo.Statements.Replace(
firstStatement,
firstStatement.ReplaceNode(
objectCreation,
objectCreation.WithInitializer(CreateInitializer(objectCreation, expressionStatements))));
int count = expressionStatements.Length;
int index = selectedStatements.StartIndex + 1;
while (count > 0)
{
newStatements = newStatements.RemoveAt(index);
count--;
}
return(document.ReplaceStatementsAsync(statementsInfo, newStatements, cancellationToken));
}
public override async Task <Document> RefactorAsync(Document document, CancellationToken cancellationToken = default(CancellationToken))
{
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(IfStatement);
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
int index = statements.IndexOf(IfStatement);
SemanticModel semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
ExpressionSyntax expression = IfRefactoringHelper.GetBooleanExpression(
IfStatement.Condition,
Expression1,
Expression2,
semanticModel,
cancellationToken);
StatementSyntax newStatement = CreateStatement(expression)
.WithLeadingTrivia(IfStatement.GetLeadingTrivia())
.WithTrailingTrivia(statements[index + 1].GetTrailingTrivia())
.WithFormatterAnnotation();
SyntaxList <StatementSyntax> newStatements = statements
.RemoveAt(index)
.ReplaceAt(index, newStatement);
return(await document.ReplaceStatementsAsync(statementsInfo, newStatements, cancellationToken).ConfigureAwait(false));
}
public virtual Task <Document> InlineAsync(
ExpressionStatementSyntax expressionStatement,
SyntaxList <StatementSyntax> statements,
CancellationToken cancellationToken = default(CancellationToken))
{
int count = statements.Count;
StatementSyntax[] newStatements = RewriteStatements(statements);
newStatements[0] = newStatements[0].WithLeadingTrivia(expressionStatement.GetLeadingTrivia());
newStatements[count - 1] = newStatements[count - 1].WithTrailingTrivia(expressionStatement.GetTrailingTrivia());
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(expressionStatement);
if (statementsInfo.Success)
{
StatementsInfo newInfo = statementsInfo.WithStatements(statementsInfo.Statements.ReplaceRange(expressionStatement, newStatements));
return(Document.ReplaceNodeAsync(statementsInfo.Node, newInfo.Node, cancellationToken));
}
else
{
return(Document.ReplaceNodeAsync(expressionStatement, Block(newStatements), cancellationToken));
}
}
private static Task <Document> DuplicateStatementAsync(
Document document,
StatementSyntax statement,
CancellationToken cancellationToken = default(CancellationToken))
{
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(statement);
if (statementsInfo.Success)
{
int index = statementsInfo.Statements.IndexOf(statement);
if (index == 0 &&
statementsInfo.IsInBlock &&
statementsInfo.Block.OpenBraceToken.GetFullSpanEndLine() == statement.GetFullSpanStartLine())
{
statement = statement.PrependToLeadingTrivia(CSharpFactory.NewLine());
}
SyntaxList <StatementSyntax> newStatements = statementsInfo.Statements.Insert(index + 1, statement.WithNavigationAnnotation());
StatementsInfo newInfo = statementsInfo.WithStatements(newStatements);
return(document.ReplaceNodeAsync(statementsInfo.Node, newInfo.Node, cancellationToken));
}
else
{
SyntaxList <StatementSyntax> statements = SyntaxFactory.List(new StatementSyntax[] { statement, statement.WithNavigationAnnotation() });
BlockSyntax block = SyntaxFactory.Block(statements);
return(document.ReplaceNodeAsync(statement, block, cancellationToken));
}
}
public static async Task ComputeRefactoringAsync(
RefactoringContext context,
LocalDeclarationStatementSyntax localDeclaration)
{
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(localDeclaration);
if (!statementsInfo.Success)
{
return;
}
SingleLocalDeclarationStatementInfo localInfo = SyntaxInfo.SingleLocalDeclarationStatementInfo(localDeclaration);
if (!localInfo.Success)
{
return;
}
if (!context.Span.IsEmptyAndContainedInSpan(localInfo.EqualsToken))
{
return;
}
ExpressionSyntax value = localInfo.Initializer?.Value;
if (value == null)
{
return;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
TypeSyntax type = localInfo.Type;
if (type.IsVar)
{
ITypeSymbol typeSymbol = semanticModel.GetTypeSymbol(value, context.CancellationToken);
if (typeSymbol?.SupportsExplicitDeclaration() != true)
{
return;
}
type = typeSymbol.ToMinimalTypeSyntax(semanticModel, type.SpanStart);
}
else
{
ITypeSymbol typeSymbol = semanticModel.GetTypeSymbol(type, context.CancellationToken);
if (typeSymbol?.IsErrorType() != false)
{
return;
}
}
context.RegisterRefactoring(
"Split declaration and initialization",
cancellationToken => RefactorAsync(context.Document, localInfo, type, statementsInfo, cancellationToken));
}
internal static Task <Document> ReplaceStatementsAsync(
this Document document,
StatementsInfo statementsInfo,
SyntaxList <StatementSyntax> newStatements,
CancellationToken cancellationToken)
{
return(document.ReplaceNodeAsync(statementsInfo.Node, statementsInfo.WithStatements(newStatements).Node, cancellationToken));
}
internal static Task <Document> ReplaceStatementsAsync(
this Document document,
StatementsInfo statementsInfo,
IEnumerable <StatementSyntax> newStatements,
CancellationToken cancellationToken)
{
return(ReplaceStatementsAsync(document, statementsInfo, SyntaxFactory.List(newStatements), cancellationToken));
}
private SyntaxNode Rewrite(StatementsInfo statementsInfo)
{
_statementsInfo = statementsInfo;
var ifStatement = (IfStatementSyntax)_statementsInfo.Statements.LastButOne();
return(Rewrite(_statementsInfo, ifStatement));
}
private static Task <Document> RefactorAsync(
Document document,
StatementsInfo statementsInfo,
StatementSyntax statement,
InitializerExpressionSyntax initializer,
ExpressionSyntax initializedExpression,
CancellationToken cancellationToken)
{
ExpressionStatementSyntax[] expressions = CreateExpressionStatements(initializer, initializedExpression).ToArray();
expressions[expressions.Length - 1] = expressions[expressions.Length - 1]
.WithTrailingTrivia(statement.GetTrailingTrivia());
var objectCreationExpression = (ObjectCreationExpressionSyntax)initializer.Parent;
ObjectCreationExpressionSyntax newObjectCreationExpression = objectCreationExpression.WithInitializer(null);
if (newObjectCreationExpression.ArgumentList == null)
{
TypeSyntax type = newObjectCreationExpression.Type;
newObjectCreationExpression = newObjectCreationExpression
.WithArgumentList(ArgumentList().WithTrailingTrivia(type.GetTrailingTrivia()))
.WithType(type.WithoutTrailingTrivia());
}
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
int index = statements.IndexOf(statement);
StatementSyntax newStatement = statement.ReplaceNode(objectCreationExpression, newObjectCreationExpression);
SyntaxKind statementKind = statement.Kind();
if (statementKind == SyntaxKind.ExpressionStatement)
{
var expressionStatement = (ExpressionStatementSyntax)newStatement;
newStatement = expressionStatement
.WithExpression(expressionStatement.Expression.WithoutTrailingTrivia());
}
else if (statementKind == SyntaxKind.LocalDeclarationStatement)
{
var localDeclaration = (LocalDeclarationStatementSyntax)newStatement;
newStatement = localDeclaration
.WithDeclaration(localDeclaration.Declaration.WithoutTrailingTrivia());
}
SyntaxList <StatementSyntax> newStatements = statements.Replace(statement, newStatement);
SyntaxNode newNode = statementsInfo
.WithStatements(newStatements.InsertRange(index + 1, expressions))
.Node
.WithFormatterAnnotation();
return(document.ReplaceNodeAsync(statementsInfo.Node, newNode, cancellationToken));
}
internal static void ComputeRefactoring(RefactoringContext context, BinaryExpressionSelection binaryExpressionSelection)
{
BinaryExpressionSyntax binaryExpression = binaryExpressionSelection.BinaryExpression;
SyntaxKind kind = binaryExpression.Kind();
if (kind == SyntaxKind.LogicalAndExpression ||
kind == SyntaxKind.LogicalOrExpression)
{
BinaryExpressionSyntax condition = GetCondition(binaryExpression);
if (condition != null)
{
SyntaxNode parent = condition.Parent;
switch (parent?.Kind())
{
case SyntaxKind.IfStatement:
{
if (kind == SyntaxKind.LogicalAndExpression)
{
var refactoring = new ExtractConditionFromIfToNestedIfRefactoring();
context.RegisterRefactoring(
refactoring.Title,
cancellationToken => refactoring.RefactorAsync(context.Document, (IfStatementSyntax)parent, condition, binaryExpressionSelection, cancellationToken));
}
else if (kind == SyntaxKind.LogicalOrExpression)
{
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo((StatementSyntax)parent);
if (statementsInfo.Success)
{
var refactoring = new ExtractConditionFromIfToIfRefactoring();
context.RegisterRefactoring(
refactoring.Title,
cancellationToken => refactoring.RefactorAsync(context.Document, statementsInfo, condition, binaryExpressionSelection, cancellationToken));
}
}
break;
}
case SyntaxKind.WhileStatement:
{
if (kind == SyntaxKind.LogicalAndExpression)
{
var refactoring = new ExtractConditionFromWhileToNestedIfRefactoring();
context.RegisterRefactoring(
refactoring.Title,
cancellationToken => refactoring.RefactorAsync(context.Document, (WhileStatementSyntax)parent, condition, binaryExpressionSelection, cancellationToken));
}
break;
}
}
}
}
}
public static Task <Document> RefactorAsync(
Document document,
VariableDeclaratorSyntax declarator,
CancellationToken cancellationToken = default(CancellationToken))
{
var declaration = (VariableDeclarationSyntax)declarator.Parent;
var localDeclaration = (LocalDeclarationStatementSyntax)declaration.Parent;
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(localDeclaration);
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
int index = statements.IndexOf(localDeclaration);
StatementSyntax nextStatement = statements[index + 1];
var expressionStatement = (ExpressionStatementSyntax)nextStatement;
var assignment = (AssignmentExpressionSyntax)expressionStatement.Expression;
ExpressionSyntax right = assignment.Right;
EqualsValueClauseSyntax initializer = declarator.Initializer;
ExpressionSyntax value = initializer?.Value;
VariableDeclaratorSyntax newDeclarator = (value != null)
? declarator.ReplaceNode(value, right)
: declarator.WithInitializer(EqualsValueClause(right));
LocalDeclarationStatementSyntax newLocalDeclaration = localDeclaration.ReplaceNode(declarator, newDeclarator);
SyntaxTriviaList trailingTrivia = localDeclaration.GetTrailingTrivia();
if (!trailingTrivia.IsEmptyOrWhitespace())
{
newLocalDeclaration = newLocalDeclaration.WithTrailingTrivia(trailingTrivia.Concat(nextStatement.GetTrailingTrivia()));
}
else
{
newLocalDeclaration = newLocalDeclaration.WithTrailingTrivia(nextStatement.GetTrailingTrivia());
}
SyntaxTriviaList leadingTrivia = nextStatement.GetLeadingTrivia();
if (!leadingTrivia.IsEmptyOrWhitespace())
{
newLocalDeclaration = newLocalDeclaration.WithLeadingTrivia(newLocalDeclaration.GetLeadingTrivia().Concat(leadingTrivia));
}
SyntaxList <StatementSyntax> newStatements = statements
.Replace(localDeclaration, newLocalDeclaration)
.RemoveAt(index + 1);
return(document.ReplaceStatementsAsync(statementsInfo, newStatements, cancellationToken));
}
public bool Analyze(
MemberInvocationExpressionInfo invocationInfo,
StatementSyntax statement,
string name,
SemanticModel semanticModel,
CancellationToken cancellationToken)
{
if (statement.SpanOrTrailingTriviaContainsDirectives())
{
return(false);
}
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(statement);
if (!statementsInfo.Success)
{
return(false);
}
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
if (statements.Count == 1)
{
return(false);
}
if (!semanticModel.TryGetMethodInfo(invocationInfo.InvocationExpression, out MethodInfo methodInfo, cancellationToken))
{
return(false);
}
ITypeSymbol typeSymbol = methodInfo.ReturnType;
int i = statements.IndexOf(statement);
if (i != 0 &&
IsFixableStatement(statements[i - 1], name, typeSymbol, semanticModel, cancellationToken))
{
return(false);
}
int j = i;
while (j < statements.Count - 1)
{
if (!IsFixableStatement(statements[j + 1], name, typeSymbol, semanticModel, cancellationToken))
{
break;
}
j++;
}
return(j > i);
}
public static StatementsSelection Create(BlockSyntax block, TextSpan span)
{
if (block == null)
{
throw new ArgumentNullException(nameof(block));
}
var info = new StatementsInfo(block);
return(Create(info, span));
}
public static async Task ComputeRefactoringAsync(RefactoringContext context, VariableDeclarationSyntax variableDeclaration)
{
if (!(variableDeclaration.Parent is LocalDeclarationStatementSyntax localDeclaration))
{
return;
}
if (!StatementsInfo.CanCreate(localDeclaration))
{
return;
}
SingleLocalDeclarationStatementInfo localInfo = SyntaxInfo.SingleLocalDeclarationStatementInfo(localDeclaration);
if (!localInfo.Success)
{
return;
}
if (!context.Span.IsEmptyAndContainedInSpan(localInfo.Identifier))
{
return;
}
ExpressionSyntax value = localInfo.Initializer?.Value;
if (value == null)
{
return;
}
if (value.Kind() == SyntaxKind.DefaultExpression)
{
return;
}
if (value is LiteralExpressionSyntax)
{
return;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
var typeSymbol = semanticModel.GetTypeSymbol(localInfo.Type, context.CancellationToken) as INamedTypeSymbol;
if (typeSymbol?.Implements(SpecialType.System_IDisposable, allInterfaces: true) != true)
{
return;
}
context.RegisterRefactoring(
$"Using '{localInfo.IdentifierText}'",
cancellationToken => RefactorAsync(context.Document, localInfo, semanticModel, cancellationToken));
}
public static StatementsSelection Create(SwitchSectionSyntax switchSection, TextSpan span)
{
if (switchSection == null)
{
throw new ArgumentNullException(nameof(switchSection));
}
var info = new StatementsInfo(switchSection);
return(Create(info, span));
}
public static bool TryCreate(BlockSyntax block, TextSpan span, out StatementsSelection selectedStatements)
{
StatementsInfo info = SyntaxInfo.StatementsInfo(block);
if (!info.Success)
{
selectedStatements = null;
return(false);
}
return(TryCreate(info, span, out selectedStatements));
}
public static bool TryCreate(SwitchSectionSyntax switchSection, TextSpan span, out StatementsSelection selectedStatements)
{
StatementsInfo info = SyntaxInfo.StatementsInfo(switchSection);
if (!info.Success)
{
selectedStatements = null;
return(false);
}
return(TryCreate(info, span, out selectedStatements));
}
public Task <Document> RefactorAsync(
Document document,
StatementsInfo statementsInfo,
BinaryExpressionSyntax condition,
ExpressionSyntax expression,
CancellationToken cancellationToken = default(CancellationToken))
{
var ifStatement = (IfStatementSyntax)condition.Parent;
IfStatementSyntax newIfStatement = RemoveExpressionFromCondition(ifStatement, condition, expression)
.WithFormatterAnnotation();
SyntaxNode newNode = AddNextIf(statementsInfo, ifStatement, newIfStatement, expression);
return(document.ReplaceNodeAsync(statementsInfo.Node, newNode, cancellationToken));
}
private static async Task <Document> RefactorAsync(
Document document,
ExpressionSyntax expression,
StatementSyntax statement,
CancellationToken cancellationToken)
{
if (statement.IsEmbedded())
{
return(await document.ReplaceNodeAsync(statement, Block(statement, CreateNullCheck(expression)), cancellationToken).ConfigureAwait(false));
}
else
{
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(statement);
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
int statementIndex = statements.IndexOf(statement);
SemanticModel semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
ISymbol symbol = (statement is LocalDeclarationStatementSyntax localDeclaration)
? semanticModel.GetDeclaredSymbol(localDeclaration.Declaration.Variables.First(), cancellationToken)
: semanticModel.GetSymbol(expression, cancellationToken);
int lastStatementIndex = IncludeAllReferencesOfSymbol(symbol, expression.Kind(), statements, statementIndex + 1, semanticModel, cancellationToken);
if (lastStatementIndex != -1)
{
if (lastStatementIndex < statements.Count - 1)
{
lastStatementIndex = IncludeAllReferencesOfVariablesDeclared(statements, statementIndex + 1, lastStatementIndex, semanticModel, cancellationToken);
}
return(await RefactorAsync(
document,
expression,
statements,
statementsInfo,
statementIndex,
lastStatementIndex,
cancellationToken).ConfigureAwait(false));
}
}
return(await document.InsertNodeAfterAsync(statement, CreateNullCheck(expression), cancellationToken).ConfigureAwait(false));
}
public override async Task <Document> RefactorAsync(Document document, CancellationToken cancellationToken = default(CancellationToken))
{
SemanticModel semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
int position = IfStatement.SpanStart;
ITypeSymbol targetType = GetTargetType(position, semanticModel, cancellationToken);
BinaryExpressionSyntax coalesceExpression = RefactoringHelper.CreateCoalesceExpression(
targetType,
Left.WithoutTrivia(),
Right.WithoutTrivia(),
position,
semanticModel);
StatementSyntax statement = CreateStatement(coalesceExpression);
if (IfStatement.IsSimpleIf())
{
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(IfStatement);
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
int index = statements.IndexOf(IfStatement);
StatementSyntax newNode = statement
.WithLeadingTrivia(IfStatement.GetLeadingTrivia())
.WithTrailingTrivia(statements[index + 1].GetTrailingTrivia())
.WithFormatterAnnotation();
SyntaxList <StatementSyntax> newStatements = statements
.RemoveAt(index)
.ReplaceAt(index, newNode);
return(await document.ReplaceStatementsAsync(statementsInfo, newStatements, cancellationToken).ConfigureAwait(false));
}
else
{
StatementSyntax newNode = statement
.WithTriviaFrom(IfStatement)
.WithFormatterAnnotation();
return(await document.ReplaceNodeAsync(IfStatement, newNode, cancellationToken).ConfigureAwait(false));
}
}
public override Task <Document> RefactorAsync(
Document document,
CancellationToken cancellationToken = default(CancellationToken))
{
StatementsInfo statementsInfo = SyntaxInfo.StatementsInfo(IfStatement);
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
int index = statements.IndexOf(IfStatement);
TStatement newStatement = CreateNewStatement();
SyntaxList <StatementSyntax> newStatements = statements
.RemoveAt(index)
.ReplaceAt(index - 1, newStatement);
return(document.ReplaceStatementsAsync(statementsInfo, newStatements, cancellationToken));
}
