Frame(Syntax target, Frame parent = null, HierachicalFormatter formatter = null)
{
Parent = parent;
Formatter = parent?.Formatter ?? formatter;
Target = target;
LeftCache = new ValueCache<Frame>(() => new Frame(Target.Left, this));
RightCache = new ValueCache<Frame>(() => new Frame(Target.Right, this));
ItemsWithoutLeadingBreaksCache = new ValueCache<ResultItems>
(GetItemsWithoutLeadingBreaks);
LeadingLineBreaksCache = new ValueCache<int>(GetLeadingLineBreaksForCache);
HasInnerLineBreaksCache = new ValueCache<bool>(GetHasInnerLineBreaksForCache);
}
internal static Frame Create(Syntax target, HierachicalFormatter formatter)
{
var result = new Frame(target, formatter: formatter);
return result;
}
internal ResultItems Item(Frame target, int leadingLineBreaks = 0)
{
var tokenClass = target.Target.TokenClass;
if(!IsRelevant(tokenClass))
return new ResultItems();
var leftNeighbor = target
.LeftNeighbor?
.Chain(item => item.LeftNeighbor)
.FirstOrDefault(item => IsRelevant(item.Target.TokenClass));
var leftTokenClass = leftNeighbor?.Target.TokenClass;
var indentLevel = target.IndentLevel;
var token = target.Target.Token;
return Item
(
leftTokenClass,
leadingLineBreaks,
indentLevel,
token,
tokenClass
);
}