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//------------------------------------------------------------------------------
// <copyright file="CopyOfAction.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">[....]</owner>
//------------------------------------------------------------------------------
namespace System.Xml.Xsl.XsltOld {
using Res = System.Xml.Utils.Res;
using System;
using System.Diagnostics;
using System.Xml;
using System.Xml.XPath;
using MS.Internal.Xml.XPath;
internal class CopyOfAction : CompiledAction {
private const int ResultStored = 2;
private const int NodeSetCopied = 3;
private int selectKey = Compiler.InvalidQueryKey;
internal override void Compile(Compiler compiler) {
CompileAttributes(compiler);
CheckRequiredAttribute(compiler, selectKey != Compiler.InvalidQueryKey, "select");
CheckEmpty(compiler);
}
internal override bool CompileAttribute(Compiler compiler) {
string name = compiler.Input.LocalName;
string value = compiler.Input.Value;
if (Ref.Equal(name, compiler.Atoms.Select)) {
this.selectKey = compiler.AddQuery(value);
}
else {
return false;
}
return true;
}
internal override void Execute(Processor processor, ActionFrame frame) {
Debug.Assert(processor != null && frame != null);
switch (frame.State) {
case Initialized:
Debug.Assert(frame.NodeSet != null);
Query query = processor.GetValueQuery(this.selectKey);
object result = query.Evaluate(frame.NodeSet);
if (result is XPathNodeIterator) {
// we cash this query because otherwise current() works incorrectly. Bug#382166.
// To be perfect we should use frame.NewNodeSet here
processor.PushActionFrame(CopyNodeSetAction.GetAction(), new XPathArrayIterator(query));
frame.State = NodeSetCopied;
break;
}
XPathNavigator nav = result as XPathNavigator;
if (nav != null) {
processor.PushActionFrame(CopyNodeSetAction.GetAction(), new XPathSingletonIterator(nav));
frame.State = NodeSetCopied;
break;
}
string value = XmlConvert.ToXPathString(result);
if (processor.TextEvent(value)) {
frame.Finished();
} else {
frame.StoredOutput = value;
frame.State = ResultStored;
}
break;
case ResultStored:
Debug.Assert(frame.StoredOutput != null);
processor.TextEvent(frame.StoredOutput);
frame.Finished();
break;
case NodeSetCopied:
Debug.Assert(frame.State == NodeSetCopied);
frame.Finished();
break;
}
}
}
}
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