public static async Task <Document> RefactorAsync(
Document document,
BinaryExpressionSyntax condition,
ExpressionSyntax expression,
CancellationToken cancellationToken = default(CancellationToken))
{
SyntaxNode root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var ifStatement = (IfStatementSyntax)condition.Parent;
IfStatementSyntax newIfStatement = ifStatement.ReplaceNode(
expression.Parent,
ExtractExpressionFromConditionRefactoring.GetNewCondition(condition, expression));
newIfStatement = newIfStatement.WithFormatterAnnotation();
if (condition.IsKind(SyntaxKind.LogicalAndExpression))
{
root = root.ReplaceNode(
ifStatement,
ExtractExpressionToNestedIf(expression, ifStatement, newIfStatement));
}
else if (condition.IsKind(SyntaxKind.LogicalOrExpression))
{
root = root.ReplaceNode(
ifStatement.Parent,
ExtractExpressionToIf(expression, ifStatement, newIfStatement));
}
return(document.WithSyntaxRoot(root));
}
private static BinaryExpressionSyntax GetCondition(BinaryExpressionSyntax parent)
{
BinaryExpressionSyntax binaryExpression = ExtractExpressionFromConditionRefactoring.GetCondition(parent, SyntaxKind.IfStatement);
if (binaryExpression != null)
{
if (binaryExpression.IsKind(SyntaxKind.LogicalAndExpression) ||
binaryExpression.Parent.Parent?.IsKind(SyntaxKind.Block) == true)
{
return(binaryExpression);
}
}
return(null);
}
public static void ComputeRefactoring(RefactoringContext context, ExpressionSyntax expression)
{
if (context.Span.IsBetweenSpans(expression))
{
SyntaxNode parent = expression.Parent;
if (parent?.IsKind(SyntaxKind.LogicalAndExpression) == true)
{
BinaryExpressionSyntax binaryExpression = ExtractExpressionFromConditionRefactoring.GetCondition((BinaryExpressionSyntax)parent, SyntaxKind.WhileStatement);
if (binaryExpression?.IsKind(SyntaxKind.LogicalAndExpression) == true)
{
context.RegisterRefactoring(
$"Extract '{expression}'",
cancellationToken => RefactorAsync(context.Document, binaryExpression, expression, cancellationToken));
}
}
}
}
public static async Task <Document> RefactorAsync(
Document document,
BinaryExpressionSyntax condition,
ExpressionSyntax expression,
CancellationToken cancellationToken = default(CancellationToken))
{
SyntaxNode root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var whileStatement = (WhileStatementSyntax)condition.Parent;
WhileStatementSyntax newWhileStatement = whileStatement.ReplaceNode(
expression.Parent,
ExtractExpressionFromConditionRefactoring.GetNewCondition(condition, expression));
newWhileStatement = newWhileStatement.WithFormatterAnnotation();
root = root.ReplaceNode(
whileStatement,
ExtractExpressionToNestedIf(expression, whileStatement, newWhileStatement));
return(document.WithSyntaxRoot(root));
}