public IFormattingRule CreateRule(Document document, int position)
{
MonoDevelopContainedDocument containedDocument = MonoDevelopContainedDocument.FromDocument(document);
if (containedDocument == null)
{
return(_noopRule);
}
List <TextSpan> spans = new List <TextSpan>();
var root = document.GetSyntaxRootSynchronously(CancellationToken.None);
var text = root.SyntaxTree.GetText(CancellationToken.None);
spans.AddRange(containedDocument.GetEditorVisibleSpans());
for (var i = 0; i < spans.Count; i++)
{
var visibleSpan = spans[i];
if (visibleSpan.IntersectsWith(position) || visibleSpan.End == position)
{
return(containedDocument.GetBaseIndentationRule(root, text, spans, i));
}
}
// in razor (especially in @helper tag), it is possible for us to be asked for next line of visible span
var line = text.Lines.GetLineFromPosition(position);
if (line.LineNumber > 0)
{
line = text.Lines[line.LineNumber - 1];
// find one that intersects with previous line
for (var i = 0; i < spans.Count; i++)
{
var visibleSpan = spans[i];
if (visibleSpan.IntersectsWith(line.Span))
{
return(containedDocument.GetBaseIndentationRule(root, text, spans, i));
}
}
}
throw new InvalidOperationException();
}
private bool IsContainedDocument(Document document)
{
MonoDevelopContainedDocument containedDocument = MonoDevelopContainedDocument.FromDocument(document);
return(containedDocument != null);
}