QilStrConcatenator.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / Xslt / QilStrConcatenator.cs / 1305376 / QilStrConcatenator.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
using System.Diagnostics; 
using System.Xml; 
using System.Text;
using System.Xml.Schema; 
using System.Xml.Xsl.XPath;
using System.Xml.Xsl.Qil;

namespace System.Xml.Xsl.Xslt { 

    internal class QilStrConcatenator { 
        private XPathQilFactory f; 
        private StringBuilder   builder;
        private QilList         concat; 
        private bool inUse = false;

        public QilStrConcatenator(XPathQilFactory f) {
            this.f  = f; 
            builder = new StringBuilder();
        } 
 
        public void Reset() {
            Debug.Assert(! inUse); 
            inUse = true;
            builder.Length = 0;
            concat = null;
        } 

        private void FlushBuilder() { 
            if (concat == null) { 
                concat = f.BaseFactory.Sequence();
            } 
            if (builder.Length != 0) {
                concat.Add(f.String(builder.ToString()));
                builder.Length = 0;
            } 
        }
 
        public void Append(string value) { 
            Debug.Assert(inUse, "Reset() wasn't called");
            builder.Append(value); 
        }

        public void Append(char value) {
            Debug.Assert(inUse, "Reset() wasn't called"); 
            builder.Append(value);
        } 
 
        public void Append(QilNode value) {
            Debug.Assert(inUse, "Reset() wasn't called"); 
            if (value != null) {
                Debug.Assert(value.XmlType.TypeCode == XmlTypeCode.String);
                if (value.NodeType == QilNodeType.LiteralString) {
                    builder.Append((string)(QilLiteral)value); 
                } else {
                    FlushBuilder(); 
                    concat.Add(value); 
                }
            } 
        }

        public QilNode ToQil() {
            Debug.Assert(inUse); // If we want allow multiple calls to ToQil() this logic should be changed 
            inUse = false;
            if (concat == null) { 
                return f.String(builder.ToString()); 
            } else {
                FlushBuilder(); 
                return f.StrConcat(concat);
            }
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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