Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Configuration/System/Configuration/ErrorInfoXmlDocument.cs

@@ -0,0 +1,109 @@
+//------------------------------------------------------------------------------
+// <copyright file="ErrorInfoXmlDocument.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Configuration
+{
+    using System.Configuration.Internal;
+    using System.IO;
+    using System.Xml;
+    using System.Security.Permissions;
+
+    // ErrorInfoXmlDocument - the default Xml Document doesn't track line numbers, and line
+    // numbers are necessary to display source on config errors.
+    // These classes wrap corresponding System.Xml types and also carry 
+    // the necessary information for reporting filename / line numbers.
+    // Note: these classes will go away if webdata ever decides to incorporate line numbers
+    // into the default XML classes.  This class could also go away if webdata brings back
+    // the UserData property to hang any info off of any node.
+    internal sealed class ErrorInfoXmlDocument : XmlDocument, IConfigErrorInfo {
+        XmlTextReader   _reader;
+        int             _lineOffset;
+        string          _filename;
+
+        int IConfigErrorInfo.LineNumber {
+            get { 
+                if (_reader == null) {
+                    return 0;
+                }
+                
+                if (_lineOffset > 0) {
+                    return _reader.LineNumber + _lineOffset - 1;
+                }
+                
+                return _reader.LineNumber;
+            }
+        }
+
+        internal int LineNumber { get { return ((IConfigErrorInfo)this).LineNumber; } }
+
+        string IConfigErrorInfo.Filename { 
+            get { return _filename; } 
+        }
+
+        public override void Load(string filename) {
+            _filename = filename;
+            try {
+                _reader = new XmlTextReader(filename);
+                _reader.XmlResolver = null;
+                base.Load(_reader);
+            }
+            finally {
+                if (_reader != null) {
+                    _reader.Close();
+                    _reader = null;
+                }
+            }
+        }
+
+        private void LoadFromConfigXmlReader(ConfigXmlReader reader) {
+            IConfigErrorInfo err = (IConfigErrorInfo) reader;
+            _filename = err.Filename;
+            _lineOffset = err.LineNumber + 1;
+
+            try {
+                _reader = reader;
+                base.Load(_reader);
+            }
+            finally {
+                if (_reader != null) {
+                    _reader.Close();
+                    _reader = null;
+                }
+            }
+        }
+
+        static internal XmlNode CreateSectionXmlNode(ConfigXmlReader reader) {
+            ErrorInfoXmlDocument doc = new ErrorInfoXmlDocument();
+            doc.LoadFromConfigXmlReader(reader);
+            XmlNode xmlNode = doc.DocumentElement;
+
+            return xmlNode;
+        }
+
+
+        public override XmlAttribute CreateAttribute( string prefix, string localName, string namespaceUri ) {
+            return new ConfigXmlAttribute( _filename, LineNumber, prefix, localName, namespaceUri, this );
+        }
+        public override XmlElement CreateElement( string prefix, string localName, string namespaceUri) {
+            return new ConfigXmlElement( _filename, LineNumber, prefix, localName, namespaceUri, this );
+        }
+        public override XmlText CreateTextNode(String text) {
+            return new ConfigXmlText( _filename, LineNumber, text, this );
+        }
+        public override XmlCDataSection CreateCDataSection(String data) {
+            return new ConfigXmlCDataSection( _filename, LineNumber, data, this );
+        }
+        public override XmlComment CreateComment(String data) {
+            return new ConfigXmlComment( _filename, LineNumber, data, this );
+        }
+        public override XmlSignificantWhitespace CreateSignificantWhitespace(String data) {
+            return new ConfigXmlSignificantWhitespace( _filename, LineNumber, data, this );
+        }
+        public override XmlWhitespace CreateWhitespace(String data) {
+            return new ConfigXmlWhitespace( _filename, LineNumber, data, this );
+        }
+    }
+}