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

   1 //
   2 // System.Xml.XmlAttribute
   3 //
   4 // Author:
   5 //   Jason Diamond (jason@injektilo.org)
   6 //
   7 // (C) 2002 Jason Diamond  http://injektilo.org/
   8 //
   9
  10 using System;
  11 using System.Collections;
  12 using System.Xml.XPath;
  13
  14 namespace System.Xml
  15 {
  16         public class XmlElement : XmlLinkedNode
  17         {
  18                 #region Fields
  19
  20                 private XmlAttributeCollection attributes;
  21                 private string localName;
  22                 private string namespaceURI;
  23                 private string prefix;
  24
  25                 #endregion
  26
  27                 #region Constructor
  28
  29                 protected internal XmlElement (
  30                         string prefix,
  31                         string localName,
  32                         string namespaceURI,
  33                         XmlDocument doc) : base (doc)
  34                 {
  35                         this.prefix = prefix;
  36                         this.localName = localName;
  37                         this.namespaceURI = namespaceURI;
  38
  39                         attributes = new XmlAttributeCollection (this);
  40
  41                         // Adds default attributes
  42                         if(doc.DocumentType != null)
  43                         {
  44                         }
  45                 }
  46
  47                 #endregion
  48
  49                 #region Properties
  50
  51                 public override XmlAttributeCollection Attributes {
  52                         get { return attributes; }
  53                 }
  54
  55                 public virtual bool HasAttributes {
  56                         get { return attributes.Count > 0; }
  57                 }
  58
  59                 [MonoTODO ("Setter.")]
  60                 public override string InnerText {
  61                         get {
  62                                 // Not sure why this is an override.  Passing through for now.
  63                                 return base.InnerText;
  64                         }
  65                         set { throw new NotImplementedException (); }
  66                 }
  67
  68                 [MonoTODO ("Setter is immature")]
  69                 public override string InnerXml {
  70                         get {
  71                                 // Not sure why this is an override.  Passing through for now.
  72                                 return base.InnerXml;
  73                         }
  74                         set {
  75                                 foreach(XmlNode n in ChildNodes)
  76                                 {
  77                                         this.RemoveChild(n);
  78                                 }
  79
  80                                 // How to get xml:lang and xml:space? Create logic as ConstructNamespaceManager()?
  81                                 XmlNameTable nt = this.OwnerDocument.NameTable;
  82                                 XmlNamespaceManager nsmgr = this.ConstructNamespaceManager(); //new XmlNamespaceManager(nt);
  83                                 string lang = "";
  84                                 XmlSpace space = XmlSpace.Default;
  85
  86                                 XmlParserContext ctx = new XmlParserContext(nt, nsmgr, lang, space);
  87                                 XmlTextReader xmlReader = new XmlTextReader(value, this.NodeType, ctx);
  88                                 this.ConstructDOM(xmlReader, this);
  89                         }
  90                 }
  91
  92                 [MonoTODO]
  93                 public bool IsEmpty {
  94                         get { throw new NotImplementedException (); }
  95
  96                         set { throw new NotImplementedException (); }
  97                 }
  98
  99                 public override string LocalName {
 100                         get { return localName; }
 101                 }
 102
 103                 public override string Name {
 104                         get {
 105                                 return prefix != String.Empty ? prefix + ":" + localName : localName;
 106                         }
 107                 }
 108
 109                 public override string NamespaceURI {
 110                         get { return namespaceURI; }
 111                 }
 112
 113                 [MonoTODO]
 114                 public override XmlNode NextSibling {
 115                         get {
 116                                 return base.NextSibling;
 117                         }
 118                 }
 119
 120                 public override XmlNodeType NodeType {
 121                         get {
 122                                 return XmlNodeType.Element;
 123                         }
 124                 }
 125
 126                 internal override XPathNodeType XPathNodeType {
 127                         get {
 128                                 return XPathNodeType.Element;
 129                         }
 130                 }
 131
 132                 [MonoTODO]
 133                 public override XmlDocument OwnerDocument {
 134                         get {
 135                                 return base.OwnerDocument;
 136                         }
 137                 }
 138
 139                 public override string Prefix {
 140                         get { return prefix; }
 141                         set { prefix = value; }
 142                 }
 143
 144                 #endregion
 145
 146                 #region Methods
 147
 148                 [MonoTODO]
 149                 public override XmlNode CloneNode (bool deep)
 150                 {
 151                         XmlNode node =  new XmlElement (prefix, localName, namespaceURI,
 152                                                         OwnerDocument);
 153
 154                         for (int i = 0; i < node.Attributes.Count; i++)
 155                                 node.AppendChild (node.Attributes [i].CloneNode (false));
 156
 157                         if (deep) {
 158                                 while ((node != null) && (node.HasChildNodes)) {
 159                                         AppendChild (node.NextSibling.CloneNode (true));
 160                                         node = node.NextSibling;
 161                                 }
 162                         } // shallow cloning
 163
 164                         //
 165                         // Reminder: Also look into Default attributes.
 166                         //
 167                         return node;
 168                 }
 169
 170                 [MonoTODO]
 171                 public virtual string GetAttribute (string name)
 172                 {
 173                         XmlNode attributeNode = Attributes.GetNamedItem (name);
 174                         return attributeNode != null ? attributeNode.Value : String.Empty;
 175                 }
 176
 177                 [MonoTODO]
 178                 public virtual string GetAttribute (string localName, string namespaceURI)
 179                 {
 180                         XmlNode attributeNode = Attributes.GetNamedItem (localName, namespaceURI);
 181                         return attributeNode != null ? attributeNode.Value : String.Empty;
 182                 }
 183
 184                 [MonoTODO]
 185                 public virtual XmlAttribute GetAttributeNode (string name)
 186                 {
 187                         XmlNode attributeNode = Attributes.GetNamedItem (name);
 188                         return attributeNode != null ? attributeNode as XmlAttribute : null;
 189                 }
 190
 191                 [MonoTODO]
 192                 public virtual XmlAttribute GetAttributeNode (string localName, string namespaceURI)
 193                 {
 194                         XmlNode attributeNode = Attributes.GetNamedItem (localName, namespaceURI);
 195                         return attributeNode != null ? attributeNode as XmlAttribute : null;
 196                 }
 197
 198                 public virtual XmlNodeList GetElementsByTagName (string name)
 199                 {
 200                         ArrayList nodeArrayList = new ArrayList ();
 201                         this.searchNodesRecursively (this, name, nodeArrayList);
 202                         return new XmlNodeArrayList (nodeArrayList);
 203                 }
 204
 205                 private void searchNodesRecursively (XmlNode argNode, string argName,
 206                         ArrayList argArrayList)
 207                 {
 208                         XmlNodeList xmlNodeList = argNode.ChildNodes;
 209                         foreach (XmlNode node in xmlNodeList){
 210                                 if (node.Name.Equals (argName))
 211                                         argArrayList.Add (node);
 212                                 else
 213                                         this.searchNodesRecursively (node, argName, argArrayList);
 214                         }
 215                 }
 216
 217                 private void searchNodesRecursively (XmlNode argNode, string argName, string argNamespaceURI,
 218                         ArrayList argArrayList)
 219                 {
 220                         XmlNodeList xmlNodeList = argNode.ChildNodes;
 221                         foreach (XmlNode node in xmlNodeList)
 222                         {
 223                                 if (node.LocalName.Equals (argName) && node.NamespaceURI.Equals (argNamespaceURI))
 224                                         argArrayList.Add (node);
 225                                 else
 226                                         this.searchNodesRecursively (node, argName, argNamespaceURI, argArrayList);
 227                         }
 228                 }
 229
 230                 public virtual XmlNodeList GetElementsByTagName (string localName, string namespaceURI)
 231                 {
 232                         ArrayList nodeArrayList = new ArrayList ();
 233                         this.searchNodesRecursively (this, localName, namespaceURI, nodeArrayList);
 234                         return new XmlNodeArrayList (nodeArrayList);
 235                 }
 236
 237                 [MonoTODO]
 238                 public virtual bool HasAttribute (string name)
 239                 {
 240                         XmlNode attributeNode = Attributes.GetNamedItem (name);
 241                         return attributeNode != null;
 242                 }
 243
 244                 [MonoTODO]
 245                 public virtual bool HasAttribute (string localName, string namespaceURI)
 246                 {
 247                         throw new NotImplementedException ();
 248                 }
 249
 250                 [MonoTODO ("Don't remove default attributes.")]
 251                 public override void RemoveAll ()
 252                 {
 253                         // Remove the child nodes.
 254                         base.RemoveAll ();
 255
 256                         // Remove all attributes.
 257                         attributes.RemoveAll ();
 258                 }
 259
 260                 [MonoTODO ("Don't remove default attributes.")]
 261                 public virtual void RemoveAllAttributes ()
 262                 {
 263                         attributes.RemoveAll ();
 264                 }
 265
 266                 [MonoTODO]
 267                 public virtual void RemoveAttribute (string name)
 268                 {
 269                         throw new NotImplementedException ();
 270                 }
 271
 272                 [MonoTODO]
 273                 public virtual void RemoveAttribute (string localName, string namespaceURI)
 274                 {
 275                         throw new NotImplementedException ();
 276                 }
 277
 278                 [MonoTODO]
 279                 public virtual XmlNode RemoveAttributeAt (int i)
 280                 {
 281                         throw new NotImplementedException ();
 282                 }
 283
 284                 [MonoTODO]
 285                 public virtual XmlAttribute RemoveAttributeNode (XmlAttribute oldAttr)
 286                 {
 287                         throw new NotImplementedException ();
 288                 }
 289
 290                 [MonoTODO]
 291                 public virtual XmlAttribute RemoveAttributeNode (string localName, string namespaceURI)
 292                 {
 293                         throw new NotImplementedException ();
 294                 }
 295
 296                 [MonoTODO]
 297                 public virtual void SetAttribute (string name, string value)
 298                 {
 299                         XmlAttribute attribute = OwnerDocument.CreateAttribute (name);
 300                         attribute.SetParentNode (this);
 301                         attribute.Value = value;
 302                         Attributes.SetNamedItem (attribute);
 303                 }
 304
 305                 [MonoTODO]
 306                 public virtual string SetAttribute (string localName, string namespaceURI, string value)
 307                 {
 308                         throw new NotImplementedException ();
 309                 }
 310
 311                 [MonoTODO]
 312                 public virtual XmlAttribute SetAttributeNode (XmlAttribute newAttr)
 313                 {
 314                         newAttr.SetParentNode(this);
 315                         XmlNode oldAttr = Attributes.SetNamedItem(newAttr);
 316                         return oldAttr != null ? oldAttr as XmlAttribute : null;
 317                 }
 318
 319
 320                 public virtual XmlAttribute SetAttributeNode (string localName, string namespaceURI)
 321                 {
 322                         XmlDocument xmlDoc = this.OwnerDocument;
 323                         XmlAttribute xmlAttribute = new XmlAttribute (String.Empty, localName, namespaceURI, xmlDoc);
 324                         return this.attributes.Append (xmlAttribute);
 325                 }
 326
 327                 public override void WriteContentTo (XmlWriter w)
 328                 {
 329                         foreach(XmlNode childNode in ChildNodes)
 330                                 childNode.WriteTo(w);
 331                 }
 332
 333                 public override void WriteTo (XmlWriter w)
 334                 {
 335                         w.WriteStartElement(Prefix, LocalName, NamespaceURI);
 336
 337                         foreach(XmlNode attributeNode in Attributes)
 338                                 attributeNode.WriteTo(w);
 339
 340                         WriteContentTo(w);
 341
 342                         w.WriteEndElement();
 343                 }
 344
 345                 #endregion
 346         }
 347 }