public override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var document = context.Document;
if (document.Project.Solution.Workspace.Kind == WorkspaceKind.MiscellaneousFiles)
{
return;
}
var span = context.Span;
if (!span.IsEmpty)
{
return;
}
var cancellationToken = context.CancellationToken;
if (cancellationToken.IsCancellationRequested)
{
return;
}
var model = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
if (model.IsFromGeneratedCode(cancellationToken))
{
return;
}
var root = await model.SyntaxTree.GetRootAsync(cancellationToken).ConfigureAwait(false);
var token = root.FindToken(span.Start);
if (!token.IsIdentifierOrAccessorOrAccessibilityModifier())
{
return;
}
var node = token.Parent;
while (node != null && !(node is MemberDeclarationSyntax || node is AccessorDeclarationSyntax))
{
node = node.Parent;
}
if (node == null || node.IsKind(SyntaxKind.InterfaceDeclaration, SyntaxKind.EnumMemberDeclaration))
{
return;
}
ISymbol symbol = null;
var field = node as FieldDeclarationSyntax;
if (field != null)
{
symbol = model.GetDeclaredSymbol(field.Declaration.Variables.First(), cancellationToken);
}
else
{
var member = node as MemberDeclarationSyntax;
if (member != null)
{
symbol = model.GetDeclaredSymbol(member, cancellationToken);
}
else
{
var accessor = node as AccessorDeclarationSyntax;
if (accessor != null)
{
symbol = model.GetDeclaredSymbol(accessor, cancellationToken);
}
}
}
if (!symbol.AccessibilityChangeable())
{
return;
}
foreach (var accessibility in GetPossibleAccessibilities(model, symbol, node, cancellationToken))
{
var modifiers = GetAccessibilityModifiers(accessibility);
context.RegisterRefactoring(CodeActionFactory.Create(
token.Span,
DiagnosticSeverity.Info,
GettextCatalog.GetString("To " + String.Join(" ", modifiers)),
t =>
{
var newRoot = root.ReplaceNode(
node,
node.WithoutLeadingTrivia().WithModifiers(modifiers).WithLeadingTrivia(node.GetLeadingTrivia()));
return(Task.FromResult(document.WithSyntaxRoot(newRoot)));
}));
}
}
