internal static IList <AbstractSkriptPatternElement> Flatten(AbstractSkriptPatternElement element)
{
return(element switch
{
SkriptPattern skriptPattern => skriptPattern.Children.SelectMany(Flatten).ToList(),
_ => new List <AbstractSkriptPatternElement> {
element
}
});
protected bool TryToNarrowContext(ref ParseContext ctx, out ParseResult result)
{
result = null;
List <AbstractSkriptPatternElement> parentElements;
AbstractSkriptPatternElement parent = this;
{
while (parent?.Parent != null)
{
parent = parent.Parent;
}
parentElements = PatternHelper.Flatten(parent).ToList();
}
var indexOfThis = ElementIndex;
if (indexOfThis == -1)
{
return(true);
}
var fromIndex = indexOfThis + 1;
if (fromIndex > parentElements.Count)
{
return(true);
}
var possibleInputs =
PatternHelper.GetPossibleInputs(parentElements.SubList(fromIndex, parentElements.Count));
if (possibleInputs == null)
{
return(true);
}
var anyMatch = false;
foreach (var element in possibleInputs)
{
switch (element)
{
case LiteralPatternElement literal:
var index = ctx.Text.SafeSubstring(ctx.CurrentPosition)
.IndexOf(literal.Value, StringComparison.InvariantCultureIgnoreCase);
if (index > -1)
{
var clone = ctx;
clone.MaxLengthOverride = ctx.CurrentPosition + index;
ctx = clone;
anyMatch = true;
}
break;
}
}
//TODO: Return true if anyMatch is true
return(true);
}