private void AnalyzeExpression(CaretPosition position)
{
var trackingSpan = position.CreateTrackingSpan(buffer);
if (trackingSpan != null)
{
var vars = buffer.CurrentSnapshot.AnalyzeExpression(
trackingSpan,
false,
_provider._PublicFunctionProvider,
_provider._DatabaseInfoProvider,
_provider._ProgramFileProvider
);
if (String.IsNullOrWhiteSpace(vars.Expression))
{
Clear();
return;
}
if (vars.Value != null && vars.Variables != null)
{
IProjectEntry currProj = buffer.GetAnalysis();
if (currProj != null)
{
var references = vars.Variables
.Where(x =>
{
if (x.Location != null)
{
if ((x.Location.ProjectEntry != null && x.Location.ProjectEntry != currProj) ||
(!string.IsNullOrWhiteSpace(x.Location.FilePath) && !x.Location.FilePath.Equals(currProj.FilePath, StringComparison.OrdinalIgnoreCase)))
{
return(false);
}
return(true);
}
return(false);
})
.Select(x => new IndexSpan(x.Location.Index, vars.Value.Name.Length));
if (references != null)
{
ITextSnapshot currentSnapshot = this.buffer.CurrentSnapshot;
NormalizedSnapshotSpanCollection spans = new NormalizedSnapshotSpanCollection(references.Where(x => x.Start >= 0 && x.End < currentSnapshot.Length).Select(x => x.ToSnapshotSpan(currentSnapshot)));
if (this.highlightReferencesSpans != spans)
{
this.highlightReferencesSpans = spans;
this.FireTagsChangedEvent();
}
return;
}
}
}
}
Clear();
}
