public DiffViewPort(IEnumerable <IChildViewPort> leftChildren, IEnumerable <IChildViewPort> rightChildren)
{
left = leftChildren.ToList();
right = rightChildren.ToList();
EqualizeScroll(left, right);
Debug.Assert(left.Count == right.Count, "Diff views must have the same number of diff elements on each side!");
// combine similar children
for (int i = 0; i < left.Count - 1; i++)
{
if (CompositeChildViewPort.TryCombine(left[i], left[i + 1], out var leftResult) && CompositeChildViewPort.TryCombine(right[i], right[i + 1], out var rightResult))
{
left[i] = leftResult;
right[i] = rightResult;
left.RemoveAt(i + 1);
right.RemoveAt(i + 1);
i -= 1;
}
}
leftWidth = left.Count == 0 ? 16 : Math.Min(MaxInnerTabWidth, left.Max(child => child.Width));
rightWidth = right.Count == 0 ? 16 : Math.Min(MaxInnerTabWidth, right.Max(child => child.Width));
startOfNextSegment = new List <int>();
startOfNextSegment.Add(0);
for (int i = 0; i < Math.Min(left.Count, right.Count); i++)
{
startOfNextSegment.Add(startOfNextSegment[i] + 1 + Math.Max(left[i].Height, right[i].Height));
}
}
public static bool TryCombine(IChildViewPort a, IChildViewPort b, out CompositeChildViewPort result)
{
result = null;
if (b is CompositeChildViewPort)
{
return(false);
}
result = a is CompositeChildViewPort composite ? composite : new CompositeChildViewPort {
a
};
if (a.Parent != b.Parent)
{
return(false);
}
if (a.Width != b.Width)
{
return(false);
}
if (b.DataOffset < a.DataOffset)
{
return(false);
}
if ((b.DataOffset - a.DataOffset) % b.Width != 0)
{
return(false);
}
var bSelectionLine = (GetFirstVisibleSelectedAddress(b) - a.DataOffset) / b.Width;
var aSelectionLine = (GetLastVisibleSelectedAddress(a) - a.DataOffset) / b.Width;
var lineDif = bSelectionLine - aSelectionLine;
if (lineDif > 3)
{
return(false);
}
a.Height += lineDif;
b.ScrollValue -= (b.DataOffset - a.DataOffset) / b.Width;
b.Height = a.Height;
Debug.Assert(a.DataOffset == b.DataOffset, "Data Offsets should be the same at this point!");
result.Add(b);
return(true);
}
