/// <summary>
/// Purge any TagSpans that intersect in any way with the text changes, then update all spans
/// </summary>
public void PurgeAndUpdate(INormalizedTextChangeCollection textChanges, ITextSnapshot textSnapshot)
{
Span = Span.Translated(SpanTrackingMode.EdgeExclusive, textSnapshot);
var fullChangeSpan = new Span(textChanges.First().NewSpan.Start, textChanges.Last().NewSpan.End);
// Purge ALL TagSpans from any statements that intersect with these text changes
if (Span.IntersectsWith(fullChangeSpan))
{
// Now check more incrementally
if (textChanges.Any(t => Span.IntersectsWith(t.NewSpan)))
{
TagSpans.Clear();
}
}
/*for (var i = TagSpans.Count - 1; i >= 0; i--)
* {
* var tagSpan = TagSpans[i];
* tagSpan.Translate(textSnapshot);
*
* if (tagSpan.Span.IntersectsWith(fullChangeSpan))
* {
* // Now check more incrementally
* if (textChanges.Any(t => tagSpan.Span.IntersectsWith(t.NewSpan)))
* {
* // Remove this tagspan!
* TagSpans.RemoveAt(i);
* }
* }
* }*/
}
public IEnumerable <TagSpan <IGLSLTag> > GetOverlapping(INormalizedTextChangeCollection textChanges, ITextSnapshot textSnapshot)
{
var fullSpan = new Span(textChanges.First().NewSpan.Start, textChanges.Last().NewSpan.End);
foreach (var tagSpan in _tagSpans)
{
var translatedSpan = tagSpan.Span.TranslateTo(textSnapshot, SpanTrackingMode.EdgeExclusive);
if (translatedSpan.IntersectsWith(fullSpan))
{
// Now check more incrementally
foreach (var textChange in textChanges)
{
if (translatedSpan.IntersectsWith(textChange.NewSpan))
{
yield return(new TagSpan <IGLSLTag>(translatedSpan, tagSpan.Tag));
break;
}
}
}
}
}