int GetSubTypeIndex(ITargetItem target)
{
var parent = this;
Tracer.Assert(!string.IsNullOrWhiteSpace(target.Token));
var token = target.Token;
if(parent.Brackets.Any(item => item.Left == token))
return 0;
if(parent.Brackets.Any(item => item.Right == token))
return 2;
return 1;
}
internal Relation GetRelation(ITargetItem newItem, ITargetItem recentItem)
{
var delta = newItem.GetLeftDepth() - recentItem.GetRightDepth();
switch(delta)
{
case 0:
return GetRelationOnSameDepth
(
GetSubTypeIndex(newItem),
GetSubTypeIndex(recentItem),
newItem.Token,
recentItem.Token);
case 1:
return Relation.Push;
default:
NotImplementedMethod(newItem, recentItem, nameof(delta), delta);
return null;
}
}
