public static void Refactor(CodeRefactoringContext context, MemberDeclarationSyntax member)
{
if (member == null)
{
throw new ArgumentNullException(nameof(member));
}
SyntaxList <AttributeListSyntax> attributeLists = member.GetAttributeLists();
if (attributeLists.Count > 0)
{
AttributeListSyntax[] lists = AttributeRefactoring.GetSelectedAttributeLists(attributeLists, context.Span).ToArray();
if (lists.Length > 1)
{
context.RegisterRefactoring(
"Merge attributes",
cancellationToken =>
{
return(RefactorAsync(
context.Document,
member,
lists,
cancellationToken));
});
}
}
}
private static async Task <Document> RefactorAsync(
Document document,
MemberDeclarationSyntax member,
AttributeListSyntax[] attributeLists,
CancellationToken cancellationToken)
{
SyntaxNode root = await document.GetSyntaxRootAsync(cancellationToken);
SyntaxList <AttributeListSyntax> lists = member.GetAttributeLists();
int index = lists.IndexOf(attributeLists[0]);
for (int i = attributeLists.Length - 1; i >= 1; i--)
{
lists = lists.RemoveAt(index);
}
AttributeListSyntax list = AttributeRefactoring.MergeAttributes(attributeLists)
.WithAdditionalAnnotations(Formatter.Annotation);
lists = lists.Replace(lists[index], list);
root = root.ReplaceNode(member, member.SetAttributeLists(lists));
return(document.WithSyntaxRoot(root));
}
private static async Task <Document> SplitAttributesAsync(
Document document,
MemberDeclarationSyntax member,
AttributeListSyntax[] attributeLists,
CancellationToken cancellationToken)
{
SyntaxNode oldRoot = await document.GetSyntaxRootAsync(cancellationToken);
SyntaxList <AttributeListSyntax> lists = member.GetAttributeLists();
int index = lists.IndexOf(attributeLists[attributeLists.Length - 1]);
for (int i = attributeLists.Length - 1; i >= 0; i--)
{
lists = lists.ReplaceRange(
lists[index],
AttributeRefactoring.SplitAttributes(attributeLists[i])
.Select(f => f.WithAdditionalAnnotations(Formatter.Annotation)));
index--;
}
SyntaxNode newRoot = oldRoot.ReplaceNode(member, member.SetAttributeLists(lists));
return(document.WithSyntaxRoot(newRoot));
}