XmlWhitespace.cs

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using System.Xml.XPath;
 
namespace System.Xml;
 
public class XmlWhitespace : XmlCharacterData
{
    public override string Name => OwnerDocument.strNonSignificantWhitespaceName;
 
    public override string LocalName => OwnerDocument.strNonSignificantWhitespaceName;
 
    public override XmlNodeType NodeType => XmlNodeType.Whitespace;
 
    public override XmlNode? ParentNode
    {
        get
        {
            switch (parentNode.NodeType)
            {
            case XmlNodeType.Document:
                return base.ParentNode;
            case XmlNodeType.Text:
            case XmlNodeType.CDATA:
            case XmlNodeType.Whitespace:
            case XmlNodeType.SignificantWhitespace:
            {
                XmlNode xmlNode = parentNode.parentNode;
                while (xmlNode.IsText)
                {
                    xmlNode = xmlNode.parentNode;
                }
                return xmlNode;
            }
            default:
                return parentNode;
            }
        }
    }
 
    public override string? Value
    {
        get
        {
            return Data;
        }
        set
        {
            if (CheckOnData(value))
            {
                Data = value;
                return;
            }
            throw new ArgumentException(System.SR.Xdom_WS_Char);
        }
    }
 
    internal override XPathNodeType XPNodeType
    {
        get
        {
            XPathNodeType xnt = XPathNodeType.Whitespace;
            DecideXPNodeTypeForTextNodes(this, ref xnt);
            return xnt;
        }
    }
 
    internal override bool IsText => true;
 
    public override XmlNode? PreviousText
    {
        get
        {
            if (parentNode != null && parentNode.IsText)
            {
                return parentNode;
            }
            return null;
        }
    }
 
    protected internal XmlWhitespace(string? strData, XmlDocument doc)
        : base(strData, doc)
    {
        if (!doc.IsLoading && !CheckOnData(strData))
        {
            throw new ArgumentException(System.SR.Xdom_WS_Char);
        }
    }
 
    public override XmlNode CloneNode(bool deep)
    {
        return OwnerDocument.CreateWhitespace(Data);
    }
 
    public override void WriteTo(XmlWriter w)
    {
        w.WriteWhitespace(Data);
    }
 
    public override void WriteContentTo(XmlWriter w)
    {
    }
}