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package Torello.HTML.NodeSearch.SearchLoops.TextNodes;

import java.util.Vector;
import java.util.function.Predicate;

import Torello.HTML.*;
import Torello.Java.LV;

public class TxNPeek
{
    public static TextNodeIndex nth
        (Vector<? extends HTMLNode> html, int nth, LV l, Predicate<String> p)
    {
        HTMLNode n;

        for (int i=l.start; i < l.end; i++)

            if (    ((n = html.elementAt(i)).isTextNode())       
                &&  p.test(n.str)
                &&  (--nth == 0)
            )
                return new TextNodeIndex(i, (TextNode) n);

        return null;
    }

    public static TextNodeIndex nthFromEnd
        (Vector<? extends HTMLNode> html, int nth, LV l, Predicate<String> p)
    {
        HTMLNode n;

        for (int i=l.end-1; i >= l.start; i--)

            if (    ((n = html.elementAt(i)).isTextNode())       
                &&  p.test(n.str)
                &&  (--nth == 0)
            )
                return new TextNodeIndex(i, (TextNode) n);

        return null;
    }

    public static Vector<TextNodeIndex> all
        (Vector<? extends HTMLNode> html, LV l, Predicate<String> p)
    {
        Vector<TextNodeIndex>   ret = new Vector<>();
        HTMLNode                n;

        for (int i=l.start; i < l.end; i++)
            if ((n=html.elementAt(i)).isTextNode())       
                if (p.test(n.str))
                    ret.addElement(new TextNodeIndex(i, (TextNode) n));

        return ret;
    }

    public static Vector<TextNodeIndex> allExcept
        (Vector<? extends HTMLNode> html, LV l, Predicate<String> p)
    {
        Vector<TextNodeIndex>   ret = new Vector<>();
        HTMLNode                n;

        for (int i=l.start; i < l.end; i++)
            if ((n=html.elementAt(i)).isTextNode())       
                if (! p.test(n.str))
                    ret.addElement(new TextNodeIndex(i, (TextNode) n));

        return ret;
    }
}