private string GetUrlAtPosition(int position)
{
// Determine whether the specified position is on our 'URL indicator'
// and if so whether it is a valid URL.
var urlIndicator = m_rScintilla_TextArea.Indicators[0];
var bitmapFlag = (1 << urlIndicator.Index);
var bitmap = m_rScintilla_TextArea.IndicatorAllOnFor(position);
var hasUrlIndicator = ((bitmapFlag & bitmap) == bitmapFlag);
if (hasUrlIndicator)
{
var startPos = urlIndicator.Start(position);
var endPos = urlIndicator.End(position);
var text = m_rScintilla_TextArea.GetTextRange(startPos, endPos - startPos).Trim();
if (Uri.IsWellFormedUriString(text, UriKind.Absolute))
{
return(text);
}
}
return(null);
}