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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / XsltOld / AttributeAction.cs / 1305376 / AttributeAction.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace System.Xml.Xsl.XsltOld { using Res = System.Xml.Utils.Res; using System; using System.Diagnostics; using System.Xml; using System.Xml.XPath; internal class AttributeAction : ContainerAction { private const int NameDone = 2; private Avt nameAvt; private Avt nsAvt; private InputScopeManager manager; // Compile time precalculated AVTs private string name; private string nsUri; private PrefixQName qname; // When we not have AVTs at all we can do this. null otherwise. private static PrefixQName CreateAttributeQName(string name, string nsUri, InputScopeManager manager) { // if name == "xmlns" we don't need to generate this attribute. // to avoid i'ts generation we can return false and not add AtributeCation to it's parent container action // for now not creating this.qname will do the trick at execution time if (name == "xmlns") return null; if (nsUri == XmlReservedNs.NsXmlNs) { throw XsltException.Create(Res.Xslt_ReservedNS, nsUri); } PrefixQName qname = new PrefixQName(); qname.SetQName(name); qname.Namespace = nsUri != null ? nsUri : manager.ResolveXPathNamespace(qname.Prefix); if (qname.Prefix.StartsWith("xml", StringComparison.Ordinal)) { if (qname.Prefix.Length == 3) { // prefix == "xml" if (qname.Namespace == XmlReservedNs.NsXml && (qname.Name == "lang" || qname.Name == "space")) { // preserve prefix for xml:lang and xml:space } else { qname.ClearPrefix(); } } else if (qname.Prefix == "xmlns") { if (qname.Namespace == XmlReservedNs.NsXmlNs) { // if NS wasn't specified we have to use prefix to find it and this is imposible for 'xmlns' throw XsltException.Create(Res.Xslt_InvalidPrefix, qname.Prefix); } else { qname.ClearPrefix(); } } } return qname; } internal override void Compile(Compiler compiler) { CompileAttributes(compiler); CheckRequiredAttribute(compiler, this.nameAvt, "name"); this.name = PrecalculateAvt(ref this.nameAvt); this.nsUri = PrecalculateAvt(ref this.nsAvt ); // if both name and ns are not AVT we can calculate qname at compile time and will not need namespace manager anymore if (this.nameAvt == null && this.nsAvt == null) { if(this.name != "xmlns") { this.qname = CreateAttributeQName(this.name, this.nsUri, compiler.CloneScopeManager()); } } else { this.manager = compiler.CloneScopeManager(); } if (compiler.Recurse()) { CompileTemplate(compiler); compiler.ToParent(); } } internal override bool CompileAttribute(Compiler compiler) { string name = compiler.Input.LocalName; string value = compiler.Input.Value; if (Ref.Equal(name, compiler.Atoms.Name)) { this.nameAvt = Avt.CompileAvt(compiler, value); } else if (Ref.Equal(name, compiler.Atoms.Namespace)) { this.nsAvt = Avt.CompileAvt(compiler, 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: if(this.qname != null) { frame.CalulatedName = this.qname; } else { frame.CalulatedName = CreateAttributeQName( this.nameAvt == null ? this.name : this.nameAvt.Evaluate(processor, frame), this.nsAvt == null ? this.nsUri : this.nsAvt .Evaluate(processor, frame), this.manager ); if(frame.CalulatedName == null) { // name == "xmlns" case. Ignore xsl:attribute frame.Finished(); break; } } goto case NameDone; case NameDone : { PrefixQName qname = frame.CalulatedName; if (processor.BeginEvent(XPathNodeType.Attribute, qname.Prefix, qname.Name, qname.Namespace, false) == false) { // Come back later frame.State = NameDone; break; } processor.PushActionFrame(frame); frame.State = ProcessingChildren; break; // Allow children to run } case ProcessingChildren: if (processor.EndEvent(XPathNodeType.Attribute) == false) { frame.State = ProcessingChildren; break; } frame.Finished(); break; default: Debug.Fail("Invalid ElementAction execution state"); break; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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