CopyOfAction.cs

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using System.Xml.XPath;
using MS.Internal.Xml.XPath;
 
namespace System.Xml.Xsl.XsltOld;
 
internal class CopyOfAction : CompiledAction
{
    private int _selectKey = -1;
 
    internal override void Compile(Compiler compiler)
    {
        CompileAttributes(compiler);
        CheckRequiredAttribute(compiler, _selectKey != -1, "select");
        CheckEmpty(compiler);
    }
 
    internal override bool CompileAttribute(Compiler compiler)
    {
        string localName = compiler.Input.LocalName;
        string value = compiler.Input.Value;
        if (Ref.Equal(localName, compiler.Atoms.Select))
        {
            _selectKey = compiler.AddQuery(value);
            return true;
        }
        return false;
    }
 
    internal override void Execute(Processor processor, ActionFrame frame)
    {
        switch (frame.State)
        {
        case 0:
        {
            Query valueQuery = processor.GetValueQuery(_selectKey);
            object obj = valueQuery.Evaluate(frame.NodeSet);
            if (obj is XPathNodeIterator)
            {
                processor.PushActionFrame(CopyNodeSetAction.GetAction(), new XPathArrayIterator(valueQuery));
                frame.State = 3;
                break;
            }
            if (obj is XPathNavigator nav)
            {
                processor.PushActionFrame(CopyNodeSetAction.GetAction(), new XPathSingletonIterator(nav));
                frame.State = 3;
                break;
            }
            string text = XmlConvert.ToXPathString(obj);
            if (processor.TextEvent(text))
            {
                frame.Finished();
                break;
            }
            frame.StoredOutput = text;
            frame.State = 2;
            break;
        }
        case 2:
            processor.TextEvent(frame.StoredOutput);
            frame.Finished();
            break;
        case 3:
            frame.Finished();
            break;
        case 1:
            break;
        }
    }
}