mcs/class/System.Xml.Linq/System.Xml.Linq/XStreamingElement.cs

   1 //
   2 // Authors:
   3 //   Atsushi Enomoto
   4 //
   5 // Copyright 2007 Novell (http://www.novell.com)
   6 //
   7 // Permission is hereby granted, free of charge, to any person obtaining
   8 // a copy of this software and associated documentation files (the
   9 // "Software"), to deal in the Software without restriction, including
  10 // without limitation the rights to use, copy, modify, merge, publish,
  11 // distribute, sublicense, and/or sell copies of the Software, and to
  12 // permit persons to whom the Software is furnished to do so, subject to
  13 // the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be
  16 // included in all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  22 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.IO;
  29 using System.Collections.Generic;
  30
  31 namespace System.Xml.Linq
  32 {
  33         public class XStreamingElement
  34         {
  35                 public XStreamingElement (XName name)
  36                 {
  37                         Name = name;
  38                 }
  39
  40                 public XStreamingElement (XName name, object content)
  41                         : this (name)
  42                 {
  43                         Add (content);
  44                 }
  45
  46                 public XStreamingElement (XName name, params object [] content)
  47                         : this (name)
  48                 {
  49                         Add (content);
  50                 }
  51
  52                 XName name;
  53                 List<object> contents;
  54
  55                 public XName Name {
  56                         get { return name; }
  57                         set { name = value; }
  58                 }
  59
  60                 internal IEnumerable<object> Contents {
  61                         get { return contents; }
  62                 }
  63
  64                 public void Add (object content)
  65                 {
  66                         if (contents == null)
  67                                 contents = new List<object> ();
  68                         contents.Add (content);
  69                 }
  70
  71                 public void Add (params object [] content)
  72                 {
  73                         if (contents == null)
  74                                 contents = new List<object> ();
  75                         contents.Add (content);
  76                 }
  77
  78                 public void Save (string fileName)
  79                 {
  80                         using (TextWriter w = File.CreateText (fileName))
  81                                 Save (w, SaveOptions.None);
  82                 }
  83
  84                 public void Save (TextWriter textWriter)
  85                 {
  86                         Save (textWriter, SaveOptions.None);
  87                 }
  88
  89                 public void Save (XmlWriter writer)
  90                 {
  91                         WriteTo (writer);
  92                 }
  93
  94                 public void Save (string fileName, SaveOptions options)
  95                 {
  96                         using (TextWriter w = File.CreateText (fileName))
  97                                 Save (w, options);
  98                 }
  99
 100                 public void Save (TextWriter textWriter, SaveOptions options)
 101                 {
 102                         XmlWriterSettings s = new XmlWriterSettings ();
 103                         s.OmitXmlDeclaration = true;
 104
 105                         if ((options & SaveOptions.DisableFormatting) == SaveOptions.None)
 106                                 s.Indent = true;
 107 #if NET_4_0
 108                         if ((options & SaveOptions.OmitDuplicateNamespaces) == SaveOptions.OmitDuplicateNamespaces)
 109                                 s.NamespaceHandling |= NamespaceHandling.OmitDuplicates;
 110 #endif
 111                         using (XmlWriter w = XmlWriter.Create (textWriter, s))
 112                                 WriteTo (w);
 113                 }
 114
 115 #if NET_4_0
 116                 public void Save (Stream stream)
 117                 {
 118                         Save (stream, SaveOptions.None);
 119                 }
 120
 121                 public void Save (Stream stream, SaveOptions options)
 122                 {
 123                         XmlWriterSettings s = new XmlWriterSettings ();
 124                         if ((options & SaveOptions.DisableFormatting) == SaveOptions.None)
 125                                 s.Indent = true;
 126                         if ((options & SaveOptions.OmitDuplicateNamespaces) == SaveOptions.OmitDuplicateNamespaces)
 127                                 s.NamespaceHandling |= NamespaceHandling.OmitDuplicates;
 128
 129                         using (var writer = XmlWriter.Create (stream, s)){
 130                                 WriteTo (writer);
 131                         }
 132                 }
 133 #endif
 134
 135                 public override string ToString ()
 136                 {
 137                         return ToString (SaveOptions.None);
 138                 }
 139
 140                 public string ToString (SaveOptions options)
 141                 {
 142                         StringWriter sw = new StringWriter ();
 143                         Save (sw, options);
 144                         return sw.ToString ();
 145                 }
 146
 147                 public void WriteTo (XmlWriter writer)
 148                 {
 149                         writer.WriteStartElement (name.LocalName, name.Namespace.NamespaceName);
 150                         WriteContents (contents, writer);
 151                         writer.WriteEndElement ();
 152                 }
 153
 154                 void WriteContents (IEnumerable<object> items, XmlWriter w)
 155                 {
 156                         foreach (object o in XUtil.ExpandArray (items)) {
 157                                 if (o == null)
 158                                         continue;
 159                                 else if (o is XStreamingElement)
 160                                         ((XStreamingElement) o).WriteTo (w);
 161                                 else if (o is XNode)
 162                                         ((XNode) o).WriteTo (w);
 163                                 else if (o is object [])
 164                                         WriteContents ((object []) o, w);
 165                                 else if (o is XAttribute)
 166                                         WriteAttribute ((XAttribute) o, w);
 167                                 else
 168                                         new XText (o.ToString ()).WriteTo (w);
 169                         }
 170                 }
 171
 172                 void WriteAttribute (XAttribute a, XmlWriter w)
 173                 {
 174                         if (a.IsNamespaceDeclaration) {
 175                                 if (a.Name.Namespace == XNamespace.Xmlns)
 176                                         w.WriteAttributeString ("xmlns", a.Name.LocalName, XNamespace.Xmlns.NamespaceName, a.Value);
 177                                 else
 178                                         w.WriteAttributeString ("xmlns", a.Value);
 179                         }
 180                         else
 181                                 w.WriteAttributeString (a.Name.LocalName, a.Name.Namespace.NamespaceName, a.Value);
 182                 }
 183         }
 184 }