private string GrabNeededCharsAsHighlight(TextRun template, string text, int offset)
{
int grabChars = Math.Min(_charsToGrab, text.Length);
HighlightedTextRun htr = MakeHighlightedText(template, text.Substring(0, grabChars), offset);
_si.Content.Add(htr);
_charsToGrab -= grabChars;
text = text.Substring(grabChars);
if (!string.IsNullOrEmpty(text))
{
TextRun tr = template.Clone();
tr.Content = text;
_si.Content.Add(tr);
}
return text;
}
private void AddTargetObject(TextRun textRun)
{
string text = textRun.Content;
if (_location.CharOffset > 0)
{
TextRun tr = textRun.Clone() ;
tr.Content = text.Substring(0, _location.CharOffset);
_si.Content.Add(tr);
text = text.Substring(_location.CharOffset);
}
_charsToGrab = _location.Length;
text = GrabNeededCharsAsHighlight(textRun, text, _location.CharOffset);
}