/// <summary>
/// Gets the overlap with <paramref name="span"/> or null if there's none
/// </summary>
/// <param name="span">Span</param>
/// <returns></returns>
public HexSpan?Overlap(HexSpan span)
{
var newStart = HexPosition.Max(Start, span.Start);
var newEnd = HexPosition.Min(End, span.End);
if (newStart < newEnd)
{
return(FromBounds(newStart, newEnd));
}
return(null);
}
TextAndHexSpan Create(HexCellCollection collection, HexCell first, HexCell last, HexBufferSpan bufferSpan)
{
var firstCellSpan = first.FullSpan;
var lastCellSpan = last.FullSpan;
var startPos = HexPosition.MaxEndPosition;
var endPos = HexPosition.Zero;
for (int i = first.Index; i <= last.Index; i++)
{
var cell = collection[i];
if (!cell.HasData)
{
continue;
}
startPos = HexPosition.Min(startPos, cell.BufferStart);
endPos = HexPosition.Max(endPos, cell.BufferEnd);
}
var resultBufferSpan = startPos <= endPos ?
new HexBufferSpan(new HexBufferPoint(Buffer, startPos), new HexBufferPoint(Buffer, endPos)) :
bufferSpan;
return(new TextAndHexSpan(VST.Span.FromBounds(firstCellSpan.Start, lastCellSpan.End), resultBufferSpan));
}
static HexSpan[] Normalize(IEnumerable <HexSpan> spans)
{
if (spans == null)
{
throw new ArgumentNullException(nameof(spans));
}
var list = new List <HexSpan>(spans);
if (list.Count <= 1)
{
return(list.ToArray());
}
list.Sort(HexSpanComparer.Instance);
int index = 0;
var start = list[0].Start;
var end = list[0].End;
for (int i = 1; i < list.Count; i++)
{
var span = list[i];
if (end < span.Start)
{
list[index++] = HexSpan.FromBounds(start, end);
start = span.Start;
end = span.End;
}
else
{
end = HexPosition.Max(end, span.End);
}
}
list[index++] = HexSpan.FromBounds(start, end);
var ary = new HexSpan[index];
list.CopyTo(0, ary, 0, ary.Length);
return(ary);
}
IEnumerable <TextAndHexSpan> GetTextAndHexSpans(bool isColumnPresent, HexCellCollection collection, HexBufferSpan span, HexSpanSelectionFlags flags, VST.Span visibleSpan, VST.Span fullSpan)
{
if (span.IsDefault)
{
throw new ArgumentException();
}
if (span.Buffer != Buffer)
{
throw new ArgumentException();
}
if (!isColumnPresent)
{
yield break;
}
var overlapSpan = BufferSpan.Overlap(span);
if (overlapSpan == null)
{
yield break;
}
if ((flags & (HexSpanSelectionFlags.Group0 | HexSpanSelectionFlags.Group1)) != 0)
{
bool group0 = (flags & HexSpanSelectionFlags.Group0) != 0;
bool group1 = (flags & HexSpanSelectionFlags.Group1) != 0;
IEnumerable <HexCell> cells;
if ((flags & HexSpanSelectionFlags.AllCells) != 0)
{
cells = collection.GetCells();
overlapSpan = BufferSpan;
}
else if ((flags & HexSpanSelectionFlags.AllVisibleCells) != 0)
{
cells = collection.GetVisibleCells();
overlapSpan = BufferSpan;
}
else
{
cells = collection.GetCells(overlapSpan.Value);
}
HexCell firstCell = null;
HexCell lastCell = null;
foreach (var cell in cells)
{
if (!((cell.GroupIndex == 0 && group0) || (cell.GroupIndex == 1 && group1)))
{
continue;
}
if (firstCell == null)
{
firstCell = cell;
lastCell = cell;
}
else if (lastCell.Index + 1 == cell.Index && lastCell.GroupIndex == cell.GroupIndex)
{
lastCell = cell;
}
else
{
yield return(Create(collection, firstCell, lastCell, overlapSpan.Value));
firstCell = lastCell = cell;
}
}
if (firstCell != null)
{
yield return(Create(collection, firstCell, lastCell, overlapSpan.Value));
}
yield break;
}
if ((flags & HexSpanSelectionFlags.AllVisibleCells) != 0)
{
yield return(new TextAndHexSpan(visibleSpan, BufferSpan));
yield break;
}
if ((flags & HexSpanSelectionFlags.AllCells) != 0)
{
yield return(new TextAndHexSpan(fullSpan, BufferSpan));
yield break;
}
if ((flags & HexSpanSelectionFlags.OneValue) != 0)
{
foreach (var cell in collection.GetCells(overlapSpan.Value))
{
if (!cell.HasData)
{
continue;
}
var cellSpan = cell.GetSpan(flags);
yield return(new TextAndHexSpan(cellSpan, new HexBufferSpan(Buffer, cell.BufferSpan)));
}
}
else
{
int textStart = int.MaxValue;
int textEnd = int.MinValue;
var posStart = HexPosition.MaxValue;
var posEnd = HexPosition.MinValue;
foreach (var cell in collection.GetCells(overlapSpan.Value))
{
if (!cell.HasData)
{
continue;
}
var cellSpan = cell.GetSpan(flags);
textStart = Math.Min(textStart, cellSpan.Start);
textEnd = Math.Max(textEnd, cellSpan.End);
posStart = HexPosition.Min(posStart, cell.BufferStart);
posEnd = HexPosition.Max(posEnd, cell.BufferEnd);
}
if (textStart > textEnd || posStart > posEnd)
{
yield break;
}
yield return(new TextAndHexSpan(VST.Span.FromBounds(textStart, textEnd), new HexBufferSpan(Buffer, HexSpan.FromBounds(posStart, posEnd))));
}
}
