mcs/class/System.XML/System.Xml/XmlDocument.cs

   1 //
   2 // System.Xml.XmlDocument
   3 //
   4 // Authors:
   5 //   Daniel Weber (daniel-weber@austin.rr.com)
   6 //   Kral Ferch <kral_ferch@hotmail.com>
   7 //   Jason Diamond <jason@injektilo.org>
   8 //   Miguel de Icaza (miguel@ximian.com)
   9 //   Duncan Mak (duncan@ximian.com)
  10 //
  11 // (C) 2001 Daniel Weber
  12 // (C) 2002 Kral Ferch, Jason Diamond, Miguel de Icaza, Duncan Mak
  13 //
  14
  15 using System;
  16 using System.IO;
  17 using System.Text;
  18 using System.Xml.XPath;
  19 using System.Diagnostics;
  20 using System.Collections;
  21
  22 namespace System.Xml
  23 {
  24         public class XmlDocument : XmlNode
  25         {
  26                 #region Fields
  27
  28                 XmlLinkedNode lastLinkedChild;
  29                 XmlNameTable nameTable;
  30                 string baseURI = String.Empty;
  31                 XmlImplementation implementation;
  32                 bool preserveWhitespace = true; // Its true initial value is false.
  33
  34                 #endregion
  35
  36                 #region Constructors
  37
  38                 public XmlDocument () : base (null)
  39                 {
  40                         implementation = new XmlImplementation();
  41                         nameTable = implementation.internalNameTable;
  42                         AddDefaultNameTableKeys();
  43                 }
  44
  45                 protected internal XmlDocument (XmlImplementation imp) : base (null)
  46                 {
  47                         implementation = imp;
  48                         nameTable = imp.internalNameTable;
  49                         AddDefaultNameTableKeys();
  50                 }
  51
  52                 public XmlDocument (XmlNameTable nt) : base (null)
  53                 {
  54                         implementation = new XmlImplementation();
  55                         implementation.internalNameTable = nt;
  56                         nameTable = nt;
  57                         AddDefaultNameTableKeys();
  58                 }
  59
  60                 #endregion
  61
  62                 #region Events
  63
  64                 public event XmlNodeChangedEventHandler NodeChanged;
  65
  66                 public event XmlNodeChangedEventHandler NodeChanging;
  67
  68                 public event XmlNodeChangedEventHandler NodeInserted;
  69
  70                 public event XmlNodeChangedEventHandler NodeInserting;
  71
  72                 public event XmlNodeChangedEventHandler NodeRemoved;
  73
  74                 public event XmlNodeChangedEventHandler NodeRemoving;
  75
  76                 #endregion
  77
  78                 #region Properties
  79
  80                 public override string BaseURI {
  81                         get {
  82                                 return baseURI;
  83                         }
  84                 }
  85
  86                 public XmlElement DocumentElement {
  87                         get {
  88                                 XmlNode node = FirstChild;
  89
  90                                 while (node != null) {
  91                                         if (node is XmlElement)
  92                                                 break;
  93                                         node = node.NextSibling;
  94                                 }
  95
  96                                 return node != null ? node as XmlElement : null;
  97                         }
  98                 }
  99
 100                 [MonoTODO("It doesn't have internal subset object model.")]
 101                 public virtual XmlDocumentType DocumentType {
 102                         get {
 103                                 foreach(XmlNode n in this.ChildNodes) {
 104                                         if(n.NodeType == XmlNodeType.DocumentType)
 105                                                 return (XmlDocumentType)n;
 106                                 }
 107                                 return null;
 108                         }
 109                 }
 110
 111                 public XmlImplementation Implementation {
 112                         get { return implementation; }
 113                 }
 114
 115                 public override string InnerXml {
 116                         get {
 117                                 return base.InnerXml;
 118                         }
 119                         set {   // reason for overriding
 120                                 this.LoadXml(value);
 121                         }
 122                 }
 123
 124                 public override bool IsReadOnly {
 125                         get { return false; }
 126                 }
 127
 128                 internal override XmlLinkedNode LastLinkedChild {
 129                         get     {
 130                                 return lastLinkedChild;
 131                         }
 132
 133                         set {
 134                                 lastLinkedChild = value;
 135                         }
 136                 }
 137
 138                 public override string LocalName {
 139                         get { return "#document"; }
 140                 }
 141
 142                 public override string Name {
 143                         get { return "#document"; }
 144                 }
 145
 146                 public XmlNameTable NameTable {
 147                         get { return nameTable; }
 148                 }
 149
 150                 public override XmlNodeType NodeType {
 151                         get { return XmlNodeType.Document; }
 152                 }
 153
 154                 internal override XPathNodeType XPathNodeType {
 155                         get {
 156                                 return XPathNodeType.Root;
 157                         }
 158                 }
 159
 160                 public override XmlDocument OwnerDocument {
 161                         get { return null; }
 162                 }
 163
 164                 [MonoTODO("wait for getting 'xml:space' status for each node")]
 165                 public bool PreserveWhitespace {
 166                         get { return preserveWhitespace; }
 167                         set { preserveWhitespace = value; }
 168                 }
 169
 170                 [MonoTODO]
 171                 public virtual XmlResolver XmlResolver {
 172                         set { throw new NotImplementedException(); }
 173                 }
 174
 175                 #endregion
 176
 177                 #region Methods
 178
 179                 [MonoTODO]
 180                 public override XmlNode CloneNode (bool deep)
 181                 {
 182                         throw new NotImplementedException ();
 183                 }
 184
 185                 public XmlAttribute CreateAttribute (string name)
 186                 {
 187                         return CreateAttribute (name, String.Empty);
 188                 }
 189
 190                 public XmlAttribute CreateAttribute (string qualifiedName, string namespaceURI)
 191                 {
 192                         string prefix;
 193                         string localName;
 194
 195                         ParseName (qualifiedName, out prefix, out localName);
 196
 197                         return CreateAttribute (prefix, localName, namespaceURI);
 198                 }
 199
 200                 public virtual XmlAttribute CreateAttribute (string prefix, string localName, string namespaceURI)
 201                 {
 202                         if ((localName == null) || (localName == String.Empty))
 203                                 throw new ArgumentException ("The attribute local name cannot be empty.");
 204
 205                         return new XmlAttribute (prefix, localName, namespaceURI, this);
 206                 }
 207
 208                 public virtual XmlCDataSection CreateCDataSection (string data)
 209                 {
 210                         return new XmlCDataSection (data, this);
 211                 }
 212
 213                 public virtual XmlComment CreateComment (string data)
 214                 {
 215                         return new XmlComment(data, this);
 216                 }
 217
 218                 [MonoTODO]
 219                 protected internal virtual XmlAttribute CreateDefaultAttribute (string prefix, string localName, string namespaceURI)
 220                 {
 221                         throw new NotImplementedException ();
 222                 }
 223
 224                 public virtual XmlDocumentFragment CreateDocumentFragment ()
 225                 {
 226                         return new XmlDocumentFragment(this);
 227                 }
 228
 229                 public virtual XmlDocumentType CreateDocumentType (string name, string publicId,
 230                                                                    string systemId, string internalSubset)
 231                 {
 232                         return new XmlDocumentType (name, publicId, systemId, internalSubset, this);
 233                 }
 234
 235                 public XmlElement CreateElement (string name)
 236                 {
 237                         return CreateElement (name, String.Empty);
 238                 }
 239
 240                 public XmlElement CreateElement (
 241                         string qualifiedName,
 242                         string namespaceURI)
 243                 {
 244                         string prefix;
 245                         string localName;
 246
 247                         ParseName (qualifiedName, out prefix, out localName);
 248
 249                         return CreateElement (prefix, localName, namespaceURI);
 250                 }
 251
 252                 public virtual XmlElement CreateElement (
 253                         string prefix,
 254                         string localName,
 255                         string namespaceURI)
 256                 {
 257                         if ((localName == null) || (localName == String.Empty))
 258                                 throw new ArgumentException ("The local name for elements or attributes cannot be null or an empty string.");
 259
 260                         return new XmlElement (prefix != null ? prefix : String.Empty, localName, namespaceURI != null ? namespaceURI : String.Empty, this);
 261                 }
 262
 263                 [MonoTODO]
 264                 public virtual XmlEntityReference CreateEntityReference (string name)
 265                 {
 266                         throw new NotImplementedException ();
 267                 }
 268
 269                 [MonoTODO]
 270                 protected internal virtual XPathNavigator CreateNavigator (XmlNode node)
 271                 {
 272                         throw new NotImplementedException ();
 273                 }
 274
 275                 public virtual XmlNode CreateNode (
 276                         string nodeTypeString,
 277                         string name,
 278                         string namespaceURI)
 279                 {
 280                         return CreateNode (GetNodeTypeFromString (nodeTypeString), name, namespaceURI);
 281                 }
 282
 283                 public virtual XmlNode CreateNode (
 284                         XmlNodeType type,
 285                         string name,
 286                         string namespaceURI)
 287                 {
 288                         string prefix = null;
 289                         string localName = name;
 290
 291                         if ((type == XmlNodeType.Attribute) || (type == XmlNodeType.Element) || (type == XmlNodeType.EntityReference))
 292                                 ParseName (name, out prefix, out localName);
 293
 294                         return CreateNode (type, prefix, localName, namespaceURI);
 295                 }
 296
 297                 public virtual XmlNode CreateNode (
 298                         XmlNodeType type,
 299                         string prefix,
 300                         string name,
 301                         string namespaceURI)
 302                 {
 303                         switch (type) {
 304                                 case XmlNodeType.Attribute: return CreateAttribute (prefix, name, namespaceURI);
 305                                 case XmlNodeType.CDATA: return CreateCDataSection (null);
 306                                 case XmlNodeType.Comment: return CreateComment (null);
 307                                 case XmlNodeType.Document: return new XmlDocument (); // TODO - test to see which constructor to use, i.e. use existing NameTable or not.
 308                                 case XmlNodeType.DocumentFragment: return CreateDocumentFragment ();
 309                                 case XmlNodeType.DocumentType: return CreateDocumentType (null, null, null, null);
 310                                 case XmlNodeType.Element: return CreateElement (prefix, name, namespaceURI);
 311                                 case XmlNodeType.EntityReference: return CreateEntityReference (null);
 312                                 case XmlNodeType.ProcessingInstruction: return CreateProcessingInstruction (null, null);
 313                                 case XmlNodeType.SignificantWhitespace: return CreateSignificantWhitespace (String.Empty);
 314                                 case XmlNodeType.Text: return CreateTextNode (null);
 315                                 case XmlNodeType.Whitespace: return CreateWhitespace (String.Empty);
 316                                 case XmlNodeType.XmlDeclaration: return CreateXmlDeclaration ("1.0", null, null);
 317                                 default: throw new ArgumentOutOfRangeException(String.Format("{0}\nParameter name: {1}",
 318                                                          "Specified argument was out of the range of valid values", type.ToString ()));
 319                         }
 320                 }
 321
 322                 public virtual XmlProcessingInstruction CreateProcessingInstruction (
 323                         string target,
 324                         string data)
 325                 {
 326                         return new XmlProcessingInstruction (target, data, this);
 327                 }
 328
 329                 public virtual XmlSignificantWhitespace CreateSignificantWhitespace (string text)
 330                 {
 331                         foreach (char c in text)
 332                                 if ((c != ' ') && (c != '\r') && (c != '\n') && (c != '\t'))
 333                                     throw new ArgumentException ("Invalid whitespace characters.");
 334
 335                         return new XmlSignificantWhitespace (text, this);
 336                 }
 337
 338                 public virtual XmlText CreateTextNode (string text)
 339                 {
 340                         return new XmlText (text, this);
 341                 }
 342
 343                 public virtual XmlWhitespace CreateWhitespace (string text)
 344                 {
 345                         foreach (char c in text)
 346                                 if ((c != ' ') && (c != '\r') && (c != '\n') && (c != '\t'))
 347                                     throw new ArgumentException ("Invalid whitespace characters.");
 348
 349                         return new XmlWhitespace (text, this);
 350                 }
 351
 352                 public virtual XmlDeclaration CreateXmlDeclaration (string version, string encoding,
 353                                                                     string standalone)
 354                 {
 355                         if (version != "1.0")
 356                                 throw new ArgumentException ("version string is not correct.");
 357
 358                         if  ((standalone != null && standalone != String.Empty) && !((standalone == "yes") || (standalone == "no")))
 359                                 throw new ArgumentException ("standalone string is not correct.");
 360
 361                         return new XmlDeclaration (version, encoding, standalone, this);
 362                 }
 363
 364                 [MonoTODO]
 365                 public virtual XmlElement GetElementById (string elementId)
 366                 {
 367                         throw new NotImplementedException ();
 368                 }
 369
 370                 public virtual XmlNodeList GetElementsByTagName (string name)
 371                 {
 372                         ArrayList nodeArrayList = new ArrayList ();
 373                         this.searchNodesRecursively (this, name, nodeArrayList);
 374                         return new XmlNodeArrayList (nodeArrayList);
 375                 }
 376
 377                 private void searchNodesRecursively (XmlNode argNode, string argName,
 378                         ArrayList argArrayList)
 379                 {
 380                         XmlNodeList xmlNodeList = argNode.ChildNodes;
 381                         foreach (XmlNode node in xmlNodeList){
 382                                 if (node.Name.Equals (argName))
 383                                         argArrayList.Add (node);
 384                                 else
 385                                         this.searchNodesRecursively (node, argName, argArrayList);
 386                         }
 387                 }
 388
 389                 private void searchNodesRecursively (XmlNode argNode, string argName, string argNamespaceURI,
 390                         ArrayList argArrayList)
 391                 {
 392                         XmlNodeList xmlNodeList = argNode.ChildNodes;
 393                         foreach (XmlNode node in xmlNodeList){
 394                                 if (node.LocalName.Equals (argName) && node.NamespaceURI.Equals (argNamespaceURI))
 395                                         argArrayList.Add (node);
 396                                 else
 397                                         this.searchNodesRecursively (node, argName, argNamespaceURI, argArrayList);
 398                         }
 399                 }
 400
 401                 public virtual XmlNodeList GetElementsByTagName (string localName, string namespaceURI)
 402                 {
 403                         ArrayList nodeArrayList = new ArrayList ();
 404                         this.searchNodesRecursively (this, localName, namespaceURI, nodeArrayList);
 405                         return new XmlNodeArrayList (nodeArrayList);
 406                 }
 407
 408                 private XmlNodeType GetNodeTypeFromString (string nodeTypeString)
 409                 {
 410                         switch (nodeTypeString) {
 411                                 case "attribute": return XmlNodeType.Attribute;
 412                                 case "cdatasection": return XmlNodeType.CDATA;
 413                                 case "comment": return XmlNodeType.Comment;
 414                                 case "document": return XmlNodeType.Document;
 415                                 case "documentfragment": return XmlNodeType.DocumentFragment;
 416                                 case "documenttype": return XmlNodeType.DocumentType;
 417                                 case "element": return XmlNodeType.Element;
 418                                 case "entityreference": return XmlNodeType.EntityReference;
 419                                 case "processinginstruction": return XmlNodeType.ProcessingInstruction;
 420                                 case "significantwhitespace": return XmlNodeType.SignificantWhitespace;
 421                                 case "text": return XmlNodeType.Text;
 422                                 case "whitespace": return XmlNodeType.Whitespace;
 423                                 default:
 424                                         throw new ArgumentException(String.Format("The string doesn't represent any node type : {0}.", nodeTypeString));
 425                         }
 426                 }
 427
 428                 [MonoTODO("default attributes (of imported doc); EntityReferences; Entity; Notation")]
 429                 public virtual XmlNode ImportNode (XmlNode node, bool deep)
 430                 {
 431                         switch(node.NodeType)
 432                         {
 433                                 case XmlNodeType.Attribute:
 434                                         {
 435                                                 XmlAttribute src_att = node as XmlAttribute;
 436                                                 XmlAttribute dst_att = this.CreateAttribute(src_att.Prefix, src_att.LocalName, src_att.NamespaceURI);
 437                                                 dst_att.Value = src_att.Value;  // always explicitly specified (whether source is specified or not)
 438                                                 return dst_att;
 439                                         }
 440
 441                                 case XmlNodeType.CDATA:
 442                                         return this.CreateCDataSection(node.Value);
 443
 444                                 case XmlNodeType.Comment:
 445                                         return this.CreateComment(node.Value);
 446
 447                                 case XmlNodeType.Document:
 448                                         throw new XmlException("Document cannot be imported.");
 449
 450                                 case XmlNodeType.DocumentFragment:
 451                                         {
 452                                                 XmlDocumentFragment df = this.CreateDocumentFragment();
 453                                                 if(deep)
 454                                                 {
 455                                                         foreach(XmlNode n in node.ChildNodes)
 456                                                         {
 457                                                                 df.AppendChild(this.ImportNode(n, deep));
 458                                                         }
 459                                                 }
 460                                                 return df;
 461                                         }
 462
 463                                 case XmlNodeType.DocumentType:
 464                                         throw new XmlException("DocumentType cannot be imported.");
 465
 466                                 case XmlNodeType.Element:
 467                                         {
 468                                                 XmlElement src = (XmlElement)node;
 469                                                 XmlElement dst = this.CreateElement(src.Prefix, src.LocalName, src.NamespaceURI);
 470                                                 foreach(XmlAttribute attr in src.Attributes)
 471                                                 {
 472                                                         if(attr.Specified)      // copies only specified attributes
 473                                                                 dst.SetAttributeNode((XmlAttribute)this.ImportNode(attr, deep));
 474                                                         if(DocumentType != null)
 475                                                         {
 476                                                                 // TODO: create default attribute values
 477                                                         }
 478                                                 }
 479                                                 if(deep)
 480                                                 {
 481                                                         foreach(XmlNode n in src.ChildNodes)
 482                                                                 dst.AppendChild(this.ImportNode(n, deep));
 483                                                 }
 484                                                 return dst;
 485                                         }
 486
 487                                 case XmlNodeType.EndElement:
 488                                         throw new XmlException ("Illegal ImportNode call for NodeType.EndElement");
 489                                 case XmlNodeType.EndEntity:
 490                                         throw new XmlException ("Illegal ImportNode call for NodeType.EndEntity");
 491
 492                                 case XmlNodeType.Entity:
 493                                         throw new NotImplementedException ();   // TODO
 494
 495                                 // [2002.10.14] CreateEntityReference not implemented.
 496                                 case XmlNodeType.EntityReference:
 497                                         throw new NotImplementedException("ImportNode of EntityReference not implemented mainly because CreateEntityReference was implemented in the meantime.");
 498 //                                      return this.CreateEntityReference(node.Name);
 499
 500                                 case XmlNodeType.None:
 501                                         throw new XmlException ("Illegal ImportNode call for NodeType.None");
 502
 503                                 case XmlNodeType.Notation:
 504                                         throw new NotImplementedException ();   // TODO
 505
 506                                 case XmlNodeType.ProcessingInstruction:
 507                                         XmlProcessingInstruction pi = node as XmlProcessingInstruction;
 508                                         return this.CreateProcessingInstruction(pi.Target, pi.Data);
 509
 510                                 case XmlNodeType.SignificantWhitespace:
 511                                         return this.CreateSignificantWhitespace(node.Value);
 512
 513                                 case XmlNodeType.Text:
 514                                         return this.CreateTextNode(node.Value);
 515
 516                                 case XmlNodeType.Whitespace:
 517                                         return this.CreateWhitespace(node.Value);
 518
 519                                 case XmlNodeType.XmlDeclaration:
 520                                         XmlDeclaration srcDecl = node as XmlDeclaration;
 521                                         return this.CreateXmlDeclaration(srcDecl.Version, srcDecl.Encoding, srcDecl.Standalone);
 522
 523                                 default:
 524                                         throw new NotImplementedException ();
 525                         }
 526                 }
 527
 528                 public virtual void Load (Stream inStream)
 529                 {
 530                         XmlReader xmlReader = new XmlTextReader (inStream);
 531                         Load (xmlReader);
 532                 }
 533
 534                 public virtual void Load (string filename)
 535                 {
 536                         baseURI = filename;
 537                         XmlReader xmlReader = new XmlTextReader (new StreamReader (filename));
 538                         Load (xmlReader);
 539                 }
 540
 541                 public virtual void Load (TextReader txtReader)
 542                 {
 543                         Load (new XmlTextReader (txtReader));
 544                 }
 545
 546                 public virtual void Load (XmlReader xmlReader)
 547                 {
 548                         // Reset our document
 549                         // For now this just means removing all our children but later this
 550                         // may turn out o need to call a private method that resets other things
 551                         // like properties we have, etc.
 552                         RemoveAll ();
 553
 554                         XmlNode currentNode = this;
 555
 556                         // This method of XmlNode is previously written here.
 557                         // Then I(ginga) moved them to use this logic with XmlElement.
 558                         this.ConstructDOM(xmlReader, currentNode);
 559                 }
 560
 561                 public virtual void LoadXml (string xml)
 562                 {
 563                         XmlReader xmlReader = new XmlTextReader (new StringReader (xml));
 564                         Load (xmlReader);
 565                 }
 566
 567                 internal void onNodeChanged (XmlNode node, XmlNode Parent)
 568                 {
 569                         if (NodeChanged != null)
 570                                 NodeChanged (node, new XmlNodeChangedEventArgs
 571                                         (XmlNodeChangedAction.Change,
 572                                         node, Parent, Parent));
 573                 }
 574
 575                 internal void onNodeChanging(XmlNode node, XmlNode Parent)
 576                 {
 577                         if (NodeChanging != null)
 578                                 NodeChanging (node, new XmlNodeChangedEventArgs
 579                                         (XmlNodeChangedAction.Change,
 580                                         node, Parent, Parent));
 581                 }
 582
 583                 internal void onNodeInserted (XmlNode node, XmlNode newParent)
 584                 {
 585                         if (NodeInserted != null)
 586                                 NodeInserted (node, new XmlNodeChangedEventArgs
 587                                         (XmlNodeChangedAction.Insert,
 588                                         node, null, newParent));
 589                 }
 590
 591                 internal void onNodeInserting (XmlNode node, XmlNode newParent)
 592                 {
 593                         if (NodeInserting != null)
 594                                 NodeInserting (node, new XmlNodeChangedEventArgs
 595                                         (XmlNodeChangedAction.Insert,
 596                                         node, null, newParent));
 597                 }
 598
 599                 internal void onNodeRemoved (XmlNode node, XmlNode oldParent)
 600                 {
 601                         if (NodeRemoved != null)
 602                                 NodeRemoved (node, new XmlNodeChangedEventArgs
 603                                         (XmlNodeChangedAction.Remove,
 604                                         node, oldParent, null));
 605                 }
 606
 607                 internal void onNodeRemoving (XmlNode node, XmlNode oldParent)
 608                 {
 609                         if (NodeRemoving != null)
 610                                 NodeRemoving (node, new XmlNodeChangedEventArgs
 611                                         (XmlNodeChangedAction.Remove,
 612                                         node, oldParent, null));
 613                 }
 614
 615                 private void ParseName (string name, out string prefix, out string localName)
 616                 {
 617                         int indexOfColon = name.IndexOf (':');
 618
 619                         if (indexOfColon != -1) {
 620                                 prefix = name.Substring (0, indexOfColon);
 621                                 localName = name.Substring (indexOfColon + 1);
 622                         } else {
 623                                 prefix = "";
 624                                 localName = name;
 625                         }
 626                 }
 627
 628                 [MonoTODO]
 629                 public virtual XmlNode ReadNode(XmlReader reader)
 630                 {
 631                         throw new NotImplementedException ();
 632                 }
 633
 634                 [MonoTODO ("Verify what encoding is used by default;  Should use PreserveWhiteSpace")]
 635                 public virtual void Save(Stream outStream)
 636                 {
 637                         // To implementor: utf-8 is OK, at least for (ginga's) Japanese environment.
 638                         XmlTextWriter xmlWriter = new XmlTextWriter (outStream, Encoding.UTF8);
 639                         WriteContentTo (xmlWriter);
 640                         xmlWriter.Close ();
 641                 }
 642
 643                 [MonoTODO ("Verify what encoding is used by default; Should use PreseveWhiteSpace")]
 644                 public virtual void Save (string filename)
 645                 {
 646                         // To implementor: utf-8 is OK, at least for (ginga's) Japanese environment.
 647                         XmlTextWriter xmlWriter = new XmlTextWriter (filename, Encoding.UTF8);
 648                         WriteContentTo (xmlWriter);
 649                         xmlWriter.Close ();
 650                 }
 651
 652                 [MonoTODO]
 653                 public virtual void Save (TextWriter writer)
 654                 {
 655                         XmlTextWriter xmlWriter = new XmlTextWriter (writer);
 656                         WriteContentTo (xmlWriter);
 657                         xmlWriter.Flush ();
 658                 }
 659
 660                 [MonoTODO ("Should preserve white space if PreserveWhisspace is set")]
 661                 public virtual void Save (XmlWriter xmlWriter)
 662                 {
 663                         //
 664                         // This should preserve white space if PreserveWhiteSpace is true
 665                         //
 666                         WriteContentTo (xmlWriter);
 667                         xmlWriter.Flush ();
 668                 }
 669
 670                 public override void WriteContentTo (XmlWriter w)
 671                 {
 672                         foreach(XmlNode childNode in ChildNodes)
 673                                 childNode.WriteTo(w);
 674                 }
 675
 676                 public override void WriteTo (XmlWriter w)
 677                 {
 678                         WriteContentTo(w);
 679                 }
 680
 681                 private void AddDefaultNameTableKeys()
 682                 {
 683                         // The following keys are default of MS .NET Framework
 684                         nameTable.Add("#text");
 685                         nameTable.Add("xml");
 686                         nameTable.Add("xmlns");
 687                         nameTable.Add("#entity");
 688                         nameTable.Add("#document-fragment");
 689                         nameTable.Add("#comment");
 690                         nameTable.Add("space");
 691                         nameTable.Add("id");
 692                         nameTable.Add("#whitespace");
 693                         nameTable.Add("http://www.w3.org/2000/xmlns/");
 694                         nameTable.Add("#cdata-section");
 695                         nameTable.Add("lang");
 696                         nameTable.Add("#document");
 697                         nameTable.Add("#significant-whitespace");
 698                 }
 699                 #endregion
 700         }
 701 }