CopyAttributesAction.cs

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using System.Xml.XPath;
 
namespace System.Xml.Xsl.XsltOld;
 
internal sealed class CopyAttributesAction : Action
{
    private static readonly CopyAttributesAction s_Action = new CopyAttributesAction();
 
    internal static CopyAttributesAction GetAction()
    {
        return s_Action;
    }
 
    internal override void Execute(Processor processor, ActionFrame frame)
    {
        while (processor.CanContinue)
        {
            switch (frame.State)
            {
            default:
                return;
            case 0:
                if (!frame.Node.HasAttributes || !frame.Node.MoveToFirstAttribute())
                {
                    frame.Finished();
                    return;
                }
                frame.State = 2;
                goto case 2;
            case 2:
                if (SendBeginEvent(processor, frame.Node))
                {
                    frame.State = 3;
                    break;
                }
                return;
            case 3:
                if (SendTextEvent(processor, frame.Node))
                {
                    frame.State = 4;
                    break;
                }
                return;
            case 4:
                if (SendEndEvent(processor, frame.Node))
                {
                    frame.State = 5;
                    break;
                }
                return;
            case 5:
                if (frame.Node.MoveToNextAttribute())
                {
                    frame.State = 2;
                    break;
                }
                frame.Node.MoveToParent();
                frame.Finished();
                return;
            case 1:
                return;
            }
        }
    }
 
    private static bool SendBeginEvent(Processor processor, XPathNavigator node)
    {
        return processor.BeginEvent(XPathNodeType.Attribute, node.Prefix, node.LocalName, node.NamespaceURI, empty: false);
    }
 
    private static bool SendTextEvent(Processor processor, XPathNavigator node)
    {
        return processor.TextEvent(node.Value);
    }
 
    private static bool SendEndEvent(Processor processor, XPathNavigator node)
    {
        return processor.EndEvent(XPathNodeType.Attribute);
    }
}