public static FuncList <T> ToFuncList <T>(this IEnumerable <T> seq)
{
FuncList <T> ret = FuncListExtensions.Empty <T>();
foreach (var el in seq.Reverse())
{
ret = FuncListExtensions.Cons(el, ret);
}
return(ret);
}
private static FuncList <R> SelectUtil <T, R>(this FuncList <T> source, int i, Func <T, int, R> f)
{
if (source.IsEmpty)
{
return(FuncListExtensions.Empty <R>());
}
else
{
return(FuncListExtensions.Cons(f(source.Head, i), SelectUtil(source.Tail, i + 1, f)));
}
}
public static FuncList <R> Select <T, R>(this FuncList <T> source, Func <T, R> f)
{
if (source.IsEmpty)
{
return(FuncListExtensions.Empty <R>());
}
else
{
return(FuncListExtensions.Cons(f(source.Head), Select(source.Tail, f)));
}
}
public static FuncList <T> Concat <T>(this FuncList <FuncList <T> > concat)
{
var el = concat;
List <T> elements = new List <T>();
while (!el.IsEmpty)
{
var nested = el.Head;
while (!nested.IsEmpty)
{
elements.Add(nested.Head);
nested = nested.Tail;
}
el = el.Tail;
}
FuncList <T> ret = FuncListExtensions.Empty <T>();
for (int i = 0; i < elements.Count; i++)
{
ret = FuncListExtensions.Cons(elements[i], ret);
}
return(ret);
}
public override TranslationState VisitImagePart(ImagePart part, TranslationState ctx)
{
ctx.Result = FuncListExtensions.Cons(new ImageElement(part.Url, ctx.Rect),
FuncListExtensions.Empty <ScreenElement>());
return(ctx);
}
public override TranslationState VisitTextPart(TextPart part, TranslationState ctx)
{
ctx.Result = FuncListExtensions.Cons(new TextElement(part.Text, ctx.Rect),
FuncListExtensions.Empty <ScreenElement>());
return(ctx);
}