/// <summary>
/// Extracts identifier sequence at the caret location.
/// Fetches parts of 'abc$def' rather than tne entire expression.
/// If there is selection, returns complete selected item as is.
/// </summary>
public static string GetIdentifierUnderCaret(this ITextView textView, out Span span)
{
if (!textView.Caret.InVirtualSpace)
{
if (textView.Selection.Mode == TextSelectionMode.Stream)
{
SnapshotPoint position = textView.Caret.Position.BufferPosition;
ITextSnapshotLine line = null;
int caretPosition = -1;
if (textView.Selection.SelectedSpans.Count > 0)
{
span = textView.Selection.SelectedSpans[0];
if (span.Length > 0)
{
return(textView.TextBuffer.CurrentSnapshot.GetText(span));
}
}
line = line ?? position.GetContainingLine();
caretPosition = caretPosition >= 0 ? caretPosition : position.Position;
var item = GetItemAtPosition(line, caretPosition, x => x == RTokenType.Identifier, out span);
if (string.IsNullOrEmpty(item))
{
item = textView.GetItemBeforeCaret(out span, x => x == RTokenType.Identifier);
}
return(item);
}
}
span = Span.FromBounds(0, 0);
return(string.Empty);
}
