public static void ComputeRefactoring(RefactoringContext context, MemberDeclarationListSelection selectedMembers)
{
if (selectedMembers.Count == 1)
{
return;
}
int start = selectedMembers.First().Span.End;
SyntaxTree syntaxTree = selectedMembers.Parent.SyntaxTree;
for (int i = selectedMembers.FirstIndex + 1; i <= selectedMembers.LastIndex; i++)
{
MemberDeclarationSyntax member = selectedMembers.UnderlyingList[i];
SyntaxTrivia documentationCommentTrivia = member.GetDocumentationCommentTrivia();
TextSpan span = (documentationCommentTrivia.IsDocumentationCommentTrivia())
? documentationCommentTrivia.Span
: member.Span;
if (syntaxTree.GetLineCount(TextSpan.FromBounds(start, span.Start), context.CancellationToken) != 2)
{
return;
}
start = member.Span.End;
}
context.RegisterRefactoring(
"Add empty line between declarations",
ct => RefactorAsync(context.Document, selectedMembers, ct),
RefactoringIdentifiers.AddEmptyLineBetweenDeclarations);
}
private static void Analyze(SyntaxNodeAnalysisContext context, SyntaxList <MemberDeclarationSyntax> members)
{
int count = members.Count;
if (count <= 1)
{
return;
}
SyntaxTree tree = context.Node.SyntaxTree;
bool?isPrevSingleLine = null;
for (int i = 1; i < count; i++)
{
MemberDeclarationSyntax prevMember = members[i - 1];
SyntaxTriviaList trailingTrivia = prevMember.GetTrailingTrivia();
SyntaxTrivia lastTrailingTrivia = trailingTrivia.LastOrDefault();
if (!lastTrailingTrivia.IsKind(SyntaxKind.EndOfLineTrivia))
{
isPrevSingleLine = false;
continue;
}
MemberDeclarationSyntax member = members[i];
SyntaxTrivia documentationCommentTrivia = member.GetDocumentationCommentTrivia();
bool hasDocumentationComment = !documentationCommentTrivia.IsKind(SyntaxKind.None);
if (!hasDocumentationComment)
{
bool isSingleLine = tree.IsSingleLineSpan(member.Span, context.CancellationToken);
if (isSingleLine)
{
if (isPrevSingleLine == null)
{
isPrevSingleLine = tree.IsSingleLineSpan(prevMember.Span, context.CancellationToken);
}
if (isPrevSingleLine == true)
{
isPrevSingleLine = isSingleLine;
continue;
}
}
isPrevSingleLine = isSingleLine;
}
else
{
isPrevSingleLine = null;
}
if (member
.GetLeadingTrivia()
.FirstOrDefault()
.IsKind(SyntaxKind.EndOfLineTrivia))
{
continue;
}
int end = (hasDocumentationComment) ? documentationCommentTrivia.SpanStart : member.SpanStart;
if (tree.GetLineCount(TextSpan.FromBounds(prevMember.Span.End, end), context.CancellationToken) == 2)
{
DiagnosticHelpers.ReportDiagnostic(context,
DiagnosticDescriptors.AddEmptyLineBetweenDeclarations,
lastTrailingTrivia);
}
}
}
