AxisElement.cs

Go to the documentation of this file.

namespace System.Xml.Schema;
 
internal sealed class AxisElement
{
    internal DoubleLinkAxis curNode;
 
    internal int rootDepth;
 
    internal int curDepth;
 
    internal bool isMatch;
 
    internal DoubleLinkAxis CurNode => curNode;
 
    internal AxisElement(DoubleLinkAxis node, int depth)
    {
        curNode = node;
        rootDepth = (curDepth = depth);
        isMatch = false;
    }
 
    internal void SetDepth(int depth)
    {
        rootDepth = (curDepth = depth);
    }
 
    internal void MoveToParent(int depth, ForwardAxis parent)
    {
        if (depth == curDepth - 1)
        {
            if (curNode.Input == parent.RootNode && parent.IsDss)
            {
                curNode = parent.RootNode;
                rootDepth = (curDepth = -1);
            }
            else if (curNode.Input != null)
            {
                curNode = (DoubleLinkAxis)curNode.Input;
                curDepth--;
            }
        }
        else if (depth == curDepth && isMatch)
        {
            isMatch = false;
        }
    }
 
    internal bool MoveToChild(string name, string URN, int depth, ForwardAxis parent)
    {
        if (Asttree.IsAttribute(curNode))
        {
            return false;
        }
        if (isMatch)
        {
            isMatch = false;
        }
        if (!AxisStack.Equal(curNode.Name, curNode.Urn, name, URN))
        {
            return false;
        }
        if (curDepth == -1)
        {
            SetDepth(depth);
        }
        else if (depth > curDepth)
        {
            return false;
        }
        if (curNode == parent.TopNode)
        {
            isMatch = true;
            return true;
        }
        DoubleLinkAxis ast = (DoubleLinkAxis)curNode.Next;
        if (Asttree.IsAttribute(ast))
        {
            isMatch = true;
            return false;
        }
        curNode = ast;
        curDepth++;
        return false;
    }
}