FunctionFocus.cs

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using System.Collections.Generic;
using System.Xml.Xsl.Qil;
using System.Xml.Xsl.XPath;
 
namespace System.Xml.Xsl.Xslt;
 
internal struct FunctionFocus : IFocus
{
    private bool _isSet;
 
    private QilParameter _current;
 
    private QilParameter _position;
 
    private QilParameter _last;
 
    public bool IsFocusSet => _isSet;
 
    public void StartFocus(IList<QilNode> args, XslFlags flags)
    {
        int num = 0;
        if ((flags & XslFlags.Current) != 0)
        {
            _current = (QilParameter)args[num++];
        }
        if ((flags & XslFlags.Position) != 0)
        {
            _position = (QilParameter)args[num++];
        }
        if ((flags & XslFlags.Last) != 0)
        {
            _last = (QilParameter)args[num++];
        }
        _isSet = true;
    }
 
    public void StopFocus()
    {
        _isSet = false;
        _current = (_position = (_last = null));
    }
 
    public QilNode GetCurrent()
    {
        return _current;
    }
 
    public QilNode GetPosition()
    {
        return _position;
    }
 
    public QilNode GetLast()
    {
        return _last;
    }
}