private static Task <Document> AddEmptyLineAfterRegionDirectiveAndBeforeEndRegionAsync(
Document document,
DirectiveTriviaSyntax directiveTrivia,
CancellationToken cancellationToken)
{
switch (directiveTrivia.Kind())
{
case SyntaxKind.RegionDirectiveTrivia:
return(CodeFixHelpers.AddEmptyLineAfterDirectiveAsync(document, directiveTrivia, cancellationToken));
case SyntaxKind.EndRegionDirectiveTrivia:
return(CodeFixHelpers.AddEmptyLineBeforeDirectiveAsync(document, directiveTrivia, cancellationToken));
default:
throw new InvalidOperationException();
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(
root,
context.Span,
out SyntaxNode node,
findInsideTrivia: true,
predicate: f => f.IsKind(SyntaxKind.UsingDirective, SyntaxKind.RegionDirectiveTrivia, SyntaxKind.EndRegionDirectiveTrivia)))
{
return;
}
Document document = context.Document;
Diagnostic diagnostic = context.Diagnostics[0];
switch (node)
{
case UsingDirectiveSyntax usingDirective:
{
if (context.Span.Start == usingDirective.SpanStart)
{
CodeAction codeAction = CodeAction.Create(
CodeFixTitles.AddEmptyLine,
ct => AddEmptyLineBeforeUsingDirectiveAsync(document, usingDirective, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
else
{
CodeAction codeAction = CodeAction.Create(
CodeFixTitles.AddEmptyLine,
ct => CodeFixHelpers.AppendEndOfLineAsync(document, usingDirective, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
break;
}
case RegionDirectiveTriviaSyntax regionDirective:
{
CodeAction codeAction = CodeAction.Create(
CodeFixTitles.AddEmptyLine,
ct => CodeFixHelpers.AddEmptyLineBeforeDirectiveAsync(document, regionDirective, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case EndRegionDirectiveTriviaSyntax endRegionDirective:
{
CodeAction codeAction = CodeAction.Create(
CodeFixTitles.AddEmptyLine,
ct => CodeFixHelpers.AddEmptyLineAfterDirectiveAsync(document, endRegionDirective, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
}