public static Link[] GetLeftElements(Link startLink, Link leftLink)
{
var result = new Link[4];
TryStepLeft(startLink, leftLink, result, 0);
startLink.WalkThroughReferersBySource(couple =>
{
if (couple.Linker == Net.And)
if (TryStepLeft(couple, leftLink, result, 2))
return Link.Stop;
return Link.Continue;
});
return result;
}
private static void RegisterExistingLetter(Link letter)
{
letter.WalkThroughReferersBySource(referer =>
{
if (referer.Linker == Net.Has)
{
Link target = referer.Target;
if (target.Source == Net.Code && target.Linker == Net.ThatIsRepresentedBy)
{
char charCode = (char)LinkConverter.ToNumber(target.Target);
CharactersToLinks[charCode] = letter;
LinksToCharacters[letter] = charCode;
}
}
});
}
public static bool TryStepRight(Link startLink, Link rightLink, Link[] result, int offset)
{
int added = 0;
startLink.WalkThroughReferersBySource(couple =>
{
if (couple.Linker == Net.And)
{
var coupleTarget = couple.Target;
if (coupleTarget == rightLink)
{
result[offset] = couple;
if (++added == 2)
return Link.Stop;
}
else if (coupleTarget.Linker == Net.And && coupleTarget.Source == rightLink)
{
result[offset + 1] = couple;
if (++added == 2)
return Link.Stop;
}
}
return Link.Continue;
});
return added > 0;
}