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

   1 //
   2 // System.Xml.XmlDeclaration
   3 //
   4 // Author:
   5 //      Duncan Mak  (duncan@ximian.com)
   6 //
   7 // (C) Ximian, Inc.
   8
   9 using System;
  10 using System.Xml;
  11
  12 namespace System.Xml
  13 {
  14         public class XmlDeclaration : XmlLinkedNode
  15         {
  16                 string encoding = "UTF-8"; // defaults to UTF-8
  17                 string standalone;
  18                 string version;
  19
  20                 protected internal XmlDeclaration (string version, string encoding,
  21                                                    string standalone, XmlDocument doc)
  22                         : base (doc)
  23                 {
  24                         if (encoding == null)
  25                                 encoding = "";
  26
  27                         if (standalone == null)
  28                                 standalone = "";
  29
  30                         this.version = version;
  31                         this.encoding = encoding;
  32                         this.standalone = standalone;
  33                 }
  34
  35                 public string Encoding  {
  36                         get { return encoding; }
  37                         set { encoding = (value == null) ? String.Empty : value; }
  38                 }
  39
  40                 public override string InnerText {
  41                         get { return Value; }
  42                         set { ParseInput (value); }
  43                 }
  44
  45                 public override string LocalName {
  46                         get { return "xml"; }
  47                 }
  48
  49                 public override string Name {
  50                         get { return "xml"; }
  51                 }
  52
  53                 public override XmlNodeType NodeType {
  54                         get { return XmlNodeType.XmlDeclaration; }
  55                 }
  56
  57                 public string Standalone {
  58                         get { return standalone; }
  59                         set {
  60                                 if (value.ToUpper() == "YES")
  61                                         standalone = "yes";
  62                                 if (value.ToUpper() == "NO")
  63                                         standalone = "no";
  64                         }
  65                 }
  66
  67                 public override string Value {
  68                         get {
  69                                 string formatEncoding = "";
  70                                 string formatStandalone = "";
  71
  72                                 if (encoding != String.Empty)
  73                                         formatEncoding = String.Format (" encoding=\"{0}\"", encoding);
  74
  75                                 if (standalone != String.Empty)
  76                                         formatStandalone = String.Format (" standalone=\"{0}\"", standalone);
  77
  78                                 return String.Format ("version=\"{0}\"{1}{2}", Version, formatEncoding, formatStandalone);
  79                         }
  80                         set { ParseInput (value); }
  81                 }
  82
  83                 public string Version {
  84                         get { return version; }
  85                 }
  86
  87                 public override XmlNode CloneNode (bool deep)
  88                 {
  89                         return new XmlDeclaration (Version, Encoding, standalone, OwnerDocument);
  90                 }
  91
  92                 public override void WriteContentTo (XmlWriter w) {}
  93
  94                 public override void WriteTo (XmlWriter w)
  95                 {
  96                         // This doesn't seem to match up very well with w.WriteStartDocument()
  97                         // so writing out custom here.
  98                         w.WriteRaw (String.Format ("<?xml {0}?>", Value));
  99                 }
 100
 101                 void ParseInput (string input)
 102                 {
 103                         Encoding = input.Split (new char [] { ' ' }) [1].Split (new char [] { '=' }) [1];
 104                         Standalone = input.Split (new char [] { ' ' }) [2].Split (new char [] { '=' }) [1];
 105                 }
 106         }
 107 }