public IEnumerable <XamlNameDecomposition> GetTagAncestry(SnapshotPoint point, bool includeSelf)
{
ITextSnapshot snapshot = point.Snapshot;
SnapshotSpan containingTag = this.GetContainingTag(point);
if (!containingTag.IsEmpty)
{
XamlNameDecomposition tagName = this.GetPreviousTagName(new SnapshotPoint(snapshot, containingTag.End));
if (tagName != null)
{
if (includeSelf)
{
yield return(tagName);
}
int lowWaterMark = containingTag.Start;
while (!(containingTag = this.GetContainingTag(new SnapshotPoint(snapshot, containingTag.Start))).IsEmpty && containingTag.Start < lowWaterMark)
{
lowWaterMark = containingTag.Start;
tagName = (XamlNameDecomposition)null;
foreach (ClassificationPosition classificationPosition in this.Tokens(containingTag))
{
if ((tagName = this.GetNameAtPosition(new SnapshotPoint(snapshot, classificationPosition.CurrentSpan.Span.Start))) != null)
{
yield return(tagName);
break;
}
}
}
}
}
}
private void ValidatePrefixBindingCache(SnapshotSpan prefixLocationSpan)
{
if (this.lastCachedVersion != null && this.lastCachedVersion.Equals((object)prefixLocationSpan.Snapshot.Version))
{
return;
}
this.cachedPrefixBindings.Clear();
this.cachedDefaultNamespaceUri = (string)null;
ITextSnapshot snapshot = prefixLocationSpan.Snapshot;
SnapshotSpan spanToTokenize = this.GetSpanToTokenize(new SnapshotPoint(snapshot, 0));
foreach (ClassificationPosition classificationPosition in this.ScanForward(new ClassificationPosition()
{
CurrentLine = spanToTokenize,
CurrentSpanList = this.GetClassificationSpans(spanToTokenize),
CurrentSpanIndex = 0
}))
{
ClassificationSpan currentSpan = classificationPosition.CurrentSpan;
IList <ClassificationSpan> currentSpanList = classificationPosition.CurrentSpanList;
int currentSpanIndex = classificationPosition.CurrentSpanIndex;
if (currentSpan.ClassificationType != XamlAnalyzer.ClassEndTag)
{
if (currentSpan.ClassificationType == XamlAnalyzer.ClassAttrNameIdentifier && currentSpan.Span.GetText() == "xmlns")
{
XamlNameDecomposition nameDecomposition = new XamlNameDecomposition(currentSpanList, currentSpanIndex);
if (nameDecomposition.PrefixText == "xmlns" && (!nameDecomposition.NameSpan.IsEmpty && currentSpanList.Count > currentSpanIndex + 4 && currentSpanList[currentSpanIndex + 4].ClassificationType == XamlAnalyzer.ClassAttrValue))
{
string text = currentSpanList[currentSpanIndex + 4].Span.GetText();
this.cachedPrefixBindings[nameDecomposition.NameText] = text.Substring(1, text.Length - 2);
}
else if (nameDecomposition.PrefixSpan.IsEmpty && nameDecomposition.NameText == "xmlns" && (currentSpanList.Count > currentSpanIndex + 2 && currentSpanList[currentSpanIndex + 2].ClassificationType == XamlAnalyzer.ClassAttrValue))
{
string text = currentSpanList[currentSpanIndex + 2].Span.GetText();
this.cachedDefaultNamespaceUri = text.Substring(1, text.Length - 2);
}
}
}
else
{
break;
}
}
this.lastCachedVersion = snapshot.Version;
}