ElementAction.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / XsltOld / ElementAction.cs / 1305376 / ElementAction.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 ElementAction : ContainerAction {
        private const int NameDone           = 2; 
 
        private Avt                nameAvt;
        private Avt                nsAvt; 
        private bool               empty;
        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. 
 
        internal ElementAction() {}
 
        private static PrefixQName CreateElementQName(string name, string nsUri, InputScopeManager manager) {
            if (nsUri == XmlReservedNs.NsXmlNs) {
                throw XsltException.Create(Res.Xslt_ReservedNS, nsUri);
            } 

            PrefixQName qname = new PrefixQName(); 
            qname.SetQName(name); 

            if (nsUri == null) { 
                qname.Namespace = manager.ResolveXmlNamespace(qname.Prefix);
            }
            else {
                qname.Namespace = nsUri; 
            }
            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 = CreateElementQName(this.name, this.nsUri, compiler.CloneScopeManager());
                }
            }
            else { 
                this.manager = compiler.CloneScopeManager();
            } 
 
            if (compiler.Recurse()) {
                Debug.Assert(this.empty == false); 
                CompileTemplate(compiler);
                compiler.ToParent();
            }
            this.empty = (this.containedActions == null) ; 
        }
 
        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 if (Ref.Equal(name, compiler.Atoms.UseAttributeSets)) { 
                AddAction(compiler.CreateUseAttributeSetsAction());
            } 
            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 = CreateElementQName(
                        this.nameAvt == null ? this.name  : this.nameAvt.Evaluate(processor, frame), 
                        this.nsAvt   == null ? this.nsUri : this.nsAvt  .Evaluate(processor, frame),
                        this.manager
                    );
                } 
                goto case NameDone;
 
            case NameDone: 
                {
                    PrefixQName qname = frame.CalulatedName; 
                    if (processor.BeginEvent(XPathNodeType.Element, qname.Prefix, qname.Name, qname.Namespace, this.empty) == false) {
                        // Come back later
                        frame.State = NameDone;
                        break; 
                    }
 
                    if (! this.empty) { 
                        processor.PushActionFrame(frame);
                        frame.State = ProcessingChildren; 
                        break;                              // Allow children to run
                    }
                    else {
                        goto case ProcessingChildren; 
                    }
                } 
            case ProcessingChildren: 
                if (processor.EndEvent(XPathNodeType.Element) == 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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ElementAction.cs source code in C# .NET

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