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

   1 //
   2 // System.Xml.XmlCharacterData.cs
   3 //
   4 // Authors:
   5 //   Jason Diamond <jason@injektilo.org>
   6 //   Kral Ferch <kral_ferch@hotmail.com>
   7 //
   8 // (C) 2002 Jason Diamond, Kral Ferch
   9 //
  10
  11 using System;
  12
  13 namespace System.Xml
  14 {
  15         public abstract class XmlCharacterData : XmlLinkedNode
  16         {
  17                 private string data;
  18
  19                 #region Constructor
  20
  21                 protected internal XmlCharacterData (string data, XmlDocument doc)
  22                         : base (doc)
  23                 {
  24                         if (data == null)
  25                                 data = String.Empty;
  26
  27                         this.data = data;
  28                 }
  29
  30                 #endregion
  31
  32                 #region Properties
  33
  34                 public virtual string Data {
  35                         get { return data; }
  36
  37                         set { data = value; }
  38                 }
  39
  40                 public override string InnerText {
  41                         get { return data; }
  42
  43                         set { data = value; }
  44                 }
  45
  46                 public virtual int Length {
  47                         get { return data != null ? data.Length : 0; }
  48                 }
  49
  50                 public override string Value {
  51                         get { return data; }
  52
  53                         set {
  54                                 OwnerDocument.onNodeChanging (this, this.ParentNode);
  55
  56                                 if (IsReadOnly)
  57                                         throw new ArgumentException ("Node is read-only.");
  58
  59                                 data = value;
  60
  61                                 OwnerDocument.onNodeChanged (this, this.ParentNode);
  62                         }
  63                 }
  64
  65                 #endregion
  66
  67                 #region Methods
  68
  69                 public virtual void AppendData (string strData)
  70                 {
  71                         OwnerDocument.onNodeChanging (this, this.ParentNode);
  72                         data += strData;
  73                         OwnerDocument.onNodeChanged (this, this.ParentNode);
  74                 }
  75
  76                 public virtual void DeleteData (int offset, int count)
  77                 {
  78                         OwnerDocument.onNodeChanging (this, this.ParentNode);
  79
  80                         if (offset < 0)
  81                                 throw new ArgumentOutOfRangeException ("offset", "Must be non-negative and must not be greater than the length of this instance.");
  82
  83                         int newCount = data.Length - offset;
  84
  85                         if ((offset + count) < data.Length)
  86                                 newCount = count;
  87
  88                         data = data.Remove (offset, newCount);
  89
  90                         OwnerDocument.onNodeChanged (this, this.ParentNode);
  91                 }
  92
  93                 public virtual void InsertData (int offset, string strData)
  94                 {
  95                         OwnerDocument.onNodeChanging (this, this.ParentNode);
  96
  97                         if ((offset < 0) || (offset > data.Length))
  98                                 throw new ArgumentOutOfRangeException ("offset", "Must be non-negative and must not be greater than the length of this instance.");
  99
 100                         data = data.Insert(offset, strData);
 101
 102                         OwnerDocument.onNodeChanged (this, this.ParentNode);
 103                 }
 104
 105                 public virtual void ReplaceData (int offset, int count, string strData)
 106                 {
 107                         OwnerDocument.onNodeChanging (this, this.ParentNode);
 108
 109                         if ((offset < 0) || (offset > data.Length))
 110                                 throw new ArgumentOutOfRangeException ("offset", "Must be non-negative and must not be greater than the length of this instance.");
 111
 112                         if (strData == null)
 113                                 throw new ArgumentNullException ("strData", "Must be non-null.");
 114
 115                         string newData = data.Substring (0, offset) + strData;
 116
 117                         if ((offset + count) < data.Length)
 118                                 newData += data.Substring (offset + count);
 119
 120                         data = newData;
 121
 122                         OwnerDocument.onNodeChanged (this, this.ParentNode);
 123                 }
 124
 125                 public virtual string Substring (int offset, int count)
 126                 {
 127                         return data.Substring (offset, count);
 128                 }
 129
 130                 #endregion
 131         }
 132 }