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 XmlLinkedNode lastLinkedChild;
  22                 private string localName;
  23                 private string namespaceURI;
  24                 private string prefix;
  25
  26                 #endregion
  27
  28                 #region Constructor
  29
  30                 protected internal XmlElement (
  31                         string prefix,
  32                         string localName,
  33                         string namespaceURI,
  34                         XmlDocument doc) : base (doc)
  35                 {
  36                         this.prefix = prefix;
  37                         this.localName = localName;
  38                         this.namespaceURI = namespaceURI;
  39
  40                         attributes = new XmlAttributeCollection (this);
  41                 }
  42
  43                 #endregion
  44
  45                 #region Properties
  46
  47                 public override XmlAttributeCollection Attributes {
  48                         get { return attributes; }
  49                 }
  50
  51                 public virtual bool HasAttributes {
  52                         get { return attributes.Count > 0; }
  53                 }
  54
  55                 [MonoTODO ("Setter.")]
  56                 public override string InnerText {
  57                         get {
  58                                 // Not sure why this is an override.  Passing through for now.
  59                                 return base.InnerText;
  60                         }
  61                         set { throw new NotImplementedException (); }
  62                 }
  63
  64                 [MonoTODO ("Setter is immature")]
  65                 public override string InnerXml {
  66                         get {
  67                                 // Not sure why this is an override.  Passing through for now.
  68                                 return base.InnerXml;
  69                         }
  70                         set {
  71                                 foreach(XmlNode n in ChildNodes)
  72                                 {
  73                                         this.RemoveChild(n);
  74                                 }
  75
  76                                 // How to get xml:lang and xml:space? Create logic as ConstructNamespaceManager()?
  77                                 XmlNameTable nt = this.OwnerDocument.NameTable;
  78                                 XmlNamespaceManager nsmgr = this.ConstructNamespaceManager(); //new XmlNamespaceManager(nt);
  79                                 string lang = "";
  80                                 XmlSpace space = XmlSpace.Default;
  81
  82                                 XmlParserContext ctx = new XmlParserContext(nt, nsmgr, lang, space);
  83                                 XmlTextReader xmlReader = new XmlTextReader(value, this.NodeType, ctx);
  84                                 this.ConstructDOM(xmlReader, this);
  85                         }
  86                 }
  87
  88                 [MonoTODO]
  89                 public bool IsEmpty {
  90                         get { throw new NotImplementedException (); }
  91
  92                         set { throw new NotImplementedException (); }
  93                 }
  94
  95                 internal override XmlLinkedNode LastLinkedChild {
  96                         get { return lastLinkedChild; }
  97
  98                         set { lastLinkedChild = value; }
  99                 }
 100
 101                 public override string LocalName {
 102                         get { return localName; }
 103                 }
 104
 105                 public override string Name {
 106                         get {
 107                                 return prefix != String.Empty ? prefix + ":" + localName : localName;
 108                         }
 109                 }
 110
 111                 public override string NamespaceURI {
 112                         get { return namespaceURI; }
 113                 }
 114
 115                 [MonoTODO]
 116                 public override XmlNode NextSibling {
 117                         get {
 118                                 return base.NextSibling;
 119                         }
 120                 }
 121
 122                 public override XmlNodeType NodeType {
 123                         get {
 124                                 return XmlNodeType.Element;
 125                         }
 126                 }
 127
 128                 internal override XPathNodeType XPathNodeType {
 129                         get {
 130                                 return XPathNodeType.Element;
 131                         }
 132                 }
 133
 134                 [MonoTODO]
 135                 public override XmlDocument OwnerDocument {
 136                         get {
 137                                 return base.OwnerDocument;
 138                         }
 139                 }
 140
 141                 public override string Prefix {
 142                         get { return prefix; }
 143                         set { prefix = value; }
 144                 }
 145
 146                 #endregion
 147
 148                 #region Methods
 149
 150                 [MonoTODO]
 151                 public override XmlNode CloneNode (bool deep)
 152                 {
 153                         XmlNode node =  new XmlElement (prefix, localName, namespaceURI,
 154                                                         OwnerDocument);
 155
 156                         for (int i = 0; i < node.Attributes.Count; i++)
 157                                 node.AppendChild (node.Attributes [i].CloneNode (false));
 158
 159                         if (deep) {
 160                                 while ((node != null) && (node.HasChildNodes)) {
 161                                         AppendChild (node.NextSibling.CloneNode (true));
 162                                         node = node.NextSibling;
 163                                 }
 164                         } // shallow cloning
 165
 166                         //
 167                         // Reminder: Also look into Default attributes.
 168                         //
 169                         return node;
 170                 }
 171
 172                 [MonoTODO]
 173                 public virtual string GetAttribute (string name)
 174                 {
 175                         XmlNode attributeNode = Attributes.GetNamedItem (name);
 176                         return attributeNode != null ? attributeNode.Value : String.Empty;
 177                 }
 178
 179                 [MonoTODO]
 180                 public virtual string GetAttribute (string localName, string namespaceURI)
 181                 {
 182                         XmlNode attributeNode = Attributes.GetNamedItem (localName, namespaceURI);
 183                         return attributeNode != null ? attributeNode.Value : String.Empty;
 184                 }
 185
 186                 [MonoTODO]
 187                 public virtual XmlAttribute GetAttributeNode (string name)
 188                 {
 189                         XmlNode attributeNode = Attributes.GetNamedItem (name);
 190                         return attributeNode != null ? attributeNode as XmlAttribute : null;
 191                 }
 192
 193                 [MonoTODO]
 194                 public virtual XmlAttribute GetAttributeNode (string localName, string namespaceURI)
 195                 {
 196                         XmlNode attributeNode = Attributes.GetNamedItem (localName, namespaceURI);
 197                         return attributeNode != null ? attributeNode as XmlAttribute : null;
 198                 }
 199
 200                 public virtual XmlNodeList GetElementsByTagName (string name)
 201                 {
 202                         ArrayList nodeArrayList = new ArrayList ();
 203                         this.searchNodesRecursively (this, name, nodeArrayList);
 204                         return new XmlNodeArrayList (nodeArrayList);
 205                 }
 206
 207                 private void searchNodesRecursively (XmlNode argNode, string argName,
 208                         ArrayList argArrayList)
 209                 {
 210                         XmlNodeList xmlNodeList = argNode.ChildNodes;
 211                         foreach (XmlNode node in xmlNodeList){
 212                                 if (node.Name.Equals (argName))
 213                                         argArrayList.Add (node);
 214                                 else
 215                                         this.searchNodesRecursively (node, argName, argArrayList);
 216                         }
 217                 }
 218
 219                 private void searchNodesRecursively (XmlNode argNode, string argName, string argNamespaceURI,
 220                         ArrayList argArrayList)
 221                 {
 222                         XmlNodeList xmlNodeList = argNode.ChildNodes;
 223                         foreach (XmlNode node in xmlNodeList)
 224                         {
 225                                 if (node.LocalName.Equals (argName) && node.NamespaceURI.Equals (argNamespaceURI))
 226                                         argArrayList.Add (node);
 227                                 else
 228                                         this.searchNodesRecursively (node, argName, argNamespaceURI, argArrayList);
 229                         }
 230                 }
 231
 232                 public virtual XmlNodeList GetElementsByTagName (string localName, string namespaceURI)
 233                 {
 234                         ArrayList nodeArrayList = new ArrayList ();
 235                         this.searchNodesRecursively (this, localName, namespaceURI, nodeArrayList);
 236                         return new XmlNodeArrayList (nodeArrayList);
 237                 }
 238
 239                 [MonoTODO]
 240                 public virtual bool HasAttribute (string name)
 241                 {
 242                         XmlNode attributeNode = Attributes.GetNamedItem (name);
 243                         return attributeNode != null;
 244                 }
 245
 246                 [MonoTODO]
 247                 public virtual bool HasAttribute (string localName, string namespaceURI)
 248                 {
 249                         throw new NotImplementedException ();
 250                 }
 251
 252                 [MonoTODO ("Don't remove default attributes.")]
 253                 public override void RemoveAll ()
 254                 {
 255                         // Remove the child nodes.
 256                         base.RemoveAll ();
 257
 258                         // Remove all attributes.
 259                         attributes.RemoveAll ();
 260                 }
 261
 262                 public virtual void RemoveAllAttributes ()
 263                 {
 264                         attributes.RemoveAll ();
 265                 }
 266
 267                 [MonoTODO]
 268                 public virtual void RemoveAttribute (string name)
 269                 {
 270                         throw new NotImplementedException ();
 271                 }
 272
 273                 [MonoTODO]
 274                 public virtual void RemoveAttribute (string localName, string namespaceURI)
 275                 {
 276                         throw new NotImplementedException ();
 277                 }
 278
 279                 [MonoTODO]
 280                 public virtual XmlNode RemoveAttributeAt (int i)
 281                 {
 282                         throw new NotImplementedException ();
 283                 }
 284
 285                 [MonoTODO]
 286                 public virtual XmlAttribute RemoveAttributeNode (XmlAttribute oldAttr)
 287                 {
 288                         throw new NotImplementedException ();
 289                 }
 290
 291                 [MonoTODO]
 292                 public virtual XmlAttribute RemoveAttributeNode (string localName, string namespaceURI)
 293                 {
 294                         throw new NotImplementedException ();
 295                 }
 296
 297                 [MonoTODO]
 298                 public virtual void SetAttribute (string name, string value)
 299                 {
 300                         XmlAttribute attribute = OwnerDocument.CreateAttribute (name);
 301                         attribute.SetParentNode (this);
 302                         attribute.Value = value;
 303                         Attributes.SetNamedItem (attribute);
 304                 }
 305
 306                 [MonoTODO]
 307                 public virtual string SetAttribute (string localName, string namespaceURI, string value)
 308                 {
 309                         throw new NotImplementedException ();
 310                 }
 311
 312                 [MonoTODO]
 313                 public virtual XmlAttribute SetAttributeNode (XmlAttribute newAttr)
 314                 {
 315                         newAttr.SetParentNode(this);
 316                         XmlNode oldAttr = Attributes.SetNamedItem(newAttr);
 317                         return oldAttr != null ? oldAttr as XmlAttribute : null;
 318                 }
 319
 320
 321                 public virtual XmlAttribute SetAttributeNode (string localName, string namespaceURI)
 322                 {
 323                         XmlDocument xmlDoc = this.OwnerDocument;\r
 324                         XmlAttribute xmlAttribute = new XmlAttribute (String.Empty, localName, namespaceURI, xmlDoc);   \r
 325                         return this.attributes.Append (xmlAttribute);
 326                 }
 327
 328                 public override void WriteContentTo (XmlWriter w)
 329                 {
 330                         foreach(XmlNode childNode in ChildNodes)
 331                                 childNode.WriteTo(w);
 332                 }
 333
 334                 public override void WriteTo (XmlWriter w)
 335                 {
 336                         w.WriteStartElement(Prefix, LocalName, NamespaceURI);
 337
 338                         foreach(XmlNode attributeNode in Attributes)
 339                                 attributeNode.WriteTo(w);
 340
 341                         WriteContentTo(w);
 342
 343                         w.WriteEndElement();
 344                 }
 345
 346                 #endregion
 347         }
 348 }