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