private void UpdateWhitespace(ITextSnapshot snapshot, FrugalList <Span> lineSpans, int delta)
{
if (lineSpans != null)
{
var collection = (lineSpans.Count == 1) ? ((IReadOnlyList <Span>)lineSpans) : new NormalizedSpanCollection(lineSpans);
for (int i = 0; (i < collection.Count); ++i)
{
Span lineSpan = collection[i];
for (int line = lineSpan.Start; (line < lineSpan.End); ++line)
{
ITextSnapshotLine snapshotLine = snapshot.GetLineFromLineNumber(line);
var state = snapshotLine.GetLeadingCharacter();
this.LeadingWhitespaceState.Increment(state, delta);
}
}
}
}