public IReadOnlyList <uint> AddStrokes(IReadOnlyList <InkStroke> inkStrokes)
{
var strokeIds = new List <uint>();
var strokeIdArray = new uint[inkStrokes.Count];
if (inkStrokes.Count == 0)
{
return(strokeIds.AsReadOnly());
}
// Duplicate list.
var strokesToAdd = inkStrokes.ToList();
// Keep a second copy that we can search through.
var inkStrokesSearchList = inkStrokes.ToList();
// First search through existing strokes.
foreach (var pair in StrokeMap)
{
var index = strokesToAdd.FindIndex(stroke => stroke == pair.Value);
if (index >= 0)
{
strokesToAdd.RemoveAt(index);
var index2 = inkStrokesSearchList.FindIndex(stroke => stroke == pair.Value);
if (index2 >= 0)
{
strokeIdArray[index2] = pair.Key;
}
}
}
// Add remaining strokes.
foreach (var stroke in strokesToAdd)
{
uint newId = TotalStrokeCount;
++TotalStrokeCount;
StrokeMap.Add(newId, stroke);
RefCountMap.Add(newId, 0);
var index = inkStrokesSearchList.FindIndex(listStroke => listStroke == stroke);
if (index >= 0)
{
strokeIdArray[index] = newId;
}
}
// Ensure stroke order is identical.
for (uint i = 0; i < inkStrokes.Count; i++)
{
strokeIds.Add(strokeIdArray[i]);
}
return(strokeIds.AsReadOnly());
}
public uint AddStroke(InkStroke inkStroke)
{
if (StrokeMap.ContainsValue(inkStroke))
{
return(StrokeMap.FirstOrDefault(x => x.Value == inkStroke).Key);
}
// Add new stroke.
var newId = TotalStrokeCount;
++TotalStrokeCount;
StrokeMap.Add(newId, inkStroke);
RefCountMap.Add(newId, 0);
return(newId);
}
