public ITextAndAdornmentCollection CreateTextAndAdornmentCollection(SnapshotSpan topSpan, ITextSnapshot sourceTextSnapshot)
{
if (topSpan.Snapshot is null)
{
throw new ArgumentException();
}
if (sourceTextSnapshot is null)
{
throw new ArgumentNullException(nameof(sourceTextSnapshot));
}
if (topSpan.Snapshot.TextBuffer != TopBuffer)
{
throw new InvalidOperationException();
}
if (sourceTextSnapshot.TextBuffer != SourceBuffer)
{
throw new InvalidOperationException();
}
if (SourceBuffer != TopBuffer)
{
throw new NotSupportedException();
}
List <AdornmentElementAndSpan>?adornmentList = null;
foreach (var tagSpan in tagAggregator.GetTags(topSpan))
{
if (adornmentList is null)
{
adornmentList = new List <AdornmentElementAndSpan>();
}
var spans = tagSpan.Span.GetSpans(sourceTextSnapshot);
Debug.Assert(spans.Count == 1);
if (spans.Count != 1)
{
continue;
}
adornmentList.Add(new AdornmentElementAndSpan(new AdornmentElement(tagSpan), spans[0]));
}
// Common case
if (adornmentList is null)
{
var elem = new TextSequenceElement(BufferGraph.CreateMappingSpan(topSpan, SpanTrackingMode.EdgeExclusive));
return(new TextAndAdornmentCollection(this, new[] { elem }));
}
var sequenceList = new List <ISequenceElement>();
adornmentList.Sort(AdornmentElementAndSpanComparer.Instance);
int start = topSpan.Start;
int end = topSpan.End;
int curr = start;
AdornmentElementAndSpan?lastAddedAdornment = null;
for (int i = 0; i < adornmentList.Count; i++)
{
var info = adornmentList[i];
int spanStart = info.Span.Length == 0 && info.AdornmentElement.Affinity == PositionAffinity.Predecessor ? info.Span.Start - 1 : info.Span.Start;
if (spanStart < start)
{
continue;
}
if (info.Span.Start > end)
{
break;
}
var textSpan = new SnapshotSpan(topSpan.Snapshot, Span.FromBounds(curr, info.Span.Start));
if (!textSpan.IsEmpty)
{
sequenceList.Add(new TextSequenceElement(BufferGraph.CreateMappingSpan(textSpan, SpanTrackingMode.EdgeExclusive)));
}
if (info.Span.Start != end || (info.Span.Length == 0 && info.AdornmentElement.Affinity == PositionAffinity.Predecessor))
{
bool canAppend = true;
if (!(lastAddedAdornment is null) && lastAddedAdornment.Value.Span.End > info.Span.Start)
{
canAppend = false;
}
if (canAppend)
{
sequenceList.Add(info.AdornmentElement);
lastAddedAdornment = info;
}
}
curr = info.Span.End;
}
if (curr < end)
{
var textSpan = new SnapshotSpan(topSpan.Snapshot, Span.FromBounds(curr, end));
Debug.Assert(!textSpan.IsEmpty);
sequenceList.Add(new TextSequenceElement(BufferGraph.CreateMappingSpan(textSpan, SpanTrackingMode.EdgeExclusive)));
}
return(new TextAndAdornmentCollection(this, sequenceList));
}
public override HexAndAdornmentCollection CreateHexAndAdornmentCollection(HexBufferLine line)
{
if (line == null)
{
throw new ArgumentNullException(nameof(line));
}
if (line.Buffer != hexView.Buffer)
{
throw new ArgumentException();
}
var lineSpan = line.TextSpan;
List <AdornmentElementAndSpan> adornmentList = null;
foreach (var tagSpan in hexTagAggregator.GetAllTags(new HexTaggerContext(line, lineSpan)))
{
if (adornmentList == null)
{
adornmentList = new List <AdornmentElementAndSpan>();
}
adornmentList.Add(new AdornmentElementAndSpan(new HexAdornmentElementImpl(tagSpan), tagSpan.Span));
}
// Common case
if (adornmentList == null)
{
var elem = new HexSequenceElementImpl(lineSpan);
return(new HexAndAdornmentCollectionImpl(this, new[] { elem }));
}
var sequenceList = new List <HexSequenceElement>();
adornmentList.Sort(AdornmentElementAndSpanComparer.Instance);
int start = lineSpan.Start;
int end = lineSpan.End;
int curr = start;
AdornmentElementAndSpan?lastAddedAdornment = null;
for (int i = 0; i < adornmentList.Count; i++)
{
var info = adornmentList[i];
int spanStart = info.Span.Length == 0 && info.AdornmentElement.Affinity == VST.PositionAffinity.Predecessor ? info.Span.Start - 1 : info.Span.Start;
if (spanStart < start)
{
continue;
}
if (info.Span.Start > end)
{
break;
}
var textSpan = VST.Span.FromBounds(curr, info.Span.Start);
if (!textSpan.IsEmpty)
{
sequenceList.Add(new HexSequenceElementImpl(textSpan));
}
if (info.Span.Start != end || (info.Span.Length == 0 && info.AdornmentElement.Affinity == VST.PositionAffinity.Predecessor))
{
bool canAppend = true;
if (lastAddedAdornment != null && lastAddedAdornment.Value.Span.End > info.Span.Start)
{
canAppend = false;
}
if (canAppend)
{
sequenceList.Add(info.AdornmentElement);
lastAddedAdornment = info;
}
}
curr = info.Span.End;
}
if (curr < end)
{
var textSpan = VST.Span.FromBounds(curr, end);
Debug.Assert(!textSpan.IsEmpty);
sequenceList.Add(new HexSequenceElementImpl(textSpan));
}
return(new HexAndAdornmentCollectionImpl(this, sequenceList.ToArray()));
}