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package Torello.HTML.NodeSearch.SearchLoops.TagNodesInclusive;

import java.util.Vector;

import Torello.HTML.*;

import Torello.HTML.NodeSearch.InclusiveException;
import Torello.Java.LV;

public class TNPeekIncl
{
    public static SubSection nth
        (Vector<? extends HTMLNode> html, int nth, LV l, String... htmlTags)
    {
        InclusiveException.check(htmlTags);

        SubSection  ret;
        HTMLNode    n;

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

            if (
                    ((n = html.elementAt(i)).isTagNode())       
                &&  (((TagNode) n).isTag(TC.OpeningTags, htmlTags))
                &&  ((ret = Util.Inclusive.subSectionOPT(html, i, l.end)) != null)
                &&  (--nth == 0)
            )
                return ret;

        return null;
    }

    public static SubSection nthFromEnd
        (Vector<? extends HTMLNode> html, int nth, LV l, String... htmlTags)
    {
        InclusiveException.check(htmlTags);

        SubSection  ret;
        HTMLNode    n;

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

            if (
                    ((n = html.elementAt(i)).isTagNode())       
                &&  (((TagNode) n).isTag(TC.OpeningTags, htmlTags))
                &&  ((ret = Util.Inclusive.subSectionOPT(html, i, l.end)) != null)
                &&  (--nth == 0)
            )
                return ret;

        return null;
    }

    public static Vector<SubSection> all
        (Vector<? extends HTMLNode> html, LV l, String... htmlTags)
    {
        InclusiveException.check(htmlTags);

        Vector<SubSection>  ret = new Vector<>();
        SubSection          ss;
        HTMLNode            n;

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

            if (
                    ((n = html.elementAt(i)).isTagNode())       
                &&  (((TagNode) n).isTag(TC.OpeningTags, htmlTags))
                &&  ((ss = Util.Inclusive.subSectionOPT(html, i, l.end)) != null)
            )
                ret.addElement(ss);

        return ret;
    }

    public static Vector<SubSection> allExcept
        (Vector<? extends HTMLNode> html, LV l, String... htmlTags)
    {
        InclusiveException.check(htmlTags);

        Vector<SubSection>  ret = new Vector<>();
        SubSection          ss;
        HTMLNode            n;

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

            if (
                    ((n = html.elementAt(i)).isTagNode())       
                &&  (((TagNode) n).isTagExcept(TC.OpeningTags, htmlTags))
                &&  ((ss = Util.Inclusive.subSectionOPT(html, i, l.end)) != null)
            )
                ret.addElement(ss);

        return ret;
    }
}