ActiveAxis.cs

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using System.Collections;
 
namespace System.Xml.Schema;
 
internal class ActiveAxis
{
    private int _currentDepth;
 
    private bool _isActive;
 
    private readonly Asttree _axisTree;
 
    private readonly ArrayList _axisStack;
 
    public int CurrentDepth => _currentDepth;
 
    internal void Reactivate()
    {
        _isActive = true;
        _currentDepth = -1;
    }
 
    internal ActiveAxis(Asttree axisTree)
    {
        _axisTree = axisTree;
        _currentDepth = -1;
        _axisStack = new ArrayList(axisTree.SubtreeArray.Count);
        for (int i = 0; i < axisTree.SubtreeArray.Count; i++)
        {
            AxisStack value = new AxisStack((ForwardAxis)axisTree.SubtreeArray[i], this);
            _axisStack.Add(value);
        }
        _isActive = true;
    }
 
    public bool MoveToStartElement(string localname, string URN)
    {
        if (!_isActive)
        {
            return false;
        }
        _currentDepth++;
        bool result = false;
        for (int i = 0; i < _axisStack.Count; i++)
        {
            AxisStack axisStack = (AxisStack)_axisStack[i];
            if (axisStack.Subtree.IsSelfAxis)
            {
                if (axisStack.Subtree.IsDss || CurrentDepth == 0)
                {
                    result = true;
                }
            }
            else if (CurrentDepth != 0 && axisStack.MoveToChild(localname, URN, _currentDepth))
            {
                result = true;
            }
        }
        return result;
    }
 
    public virtual bool EndElement(string localname, string URN)
    {
        if (_currentDepth == 0)
        {
            _isActive = false;
            _currentDepth--;
        }
        if (!_isActive)
        {
            return false;
        }
        for (int i = 0; i < _axisStack.Count; i++)
        {
            ((AxisStack)_axisStack[i]).MoveToParent(localname, URN, _currentDepth);
        }
        _currentDepth--;
        return false;
    }
 
    public bool MoveToAttribute(string localname, string URN)
    {
        if (!_isActive)
        {
            return false;
        }
        bool result = false;
        for (int i = 0; i < _axisStack.Count; i++)
        {
            if (((AxisStack)_axisStack[i]).MoveToAttribute(localname, URN, _currentDepth + 1))
            {
                result = true;
            }
        }
        return result;
    }
}