mcs/class/System.Web/System.Web.UI.WebControls/Xml.cs

   1 /**\r
   2  * Namespace: System.Web.UI.WebControls\r
   3  * Class:     Xml\r
   4  *\r
   5  * Author:  Gaurav Vaish, Gonzalo Paniagua Javier\r
   6  * Maintainer: gvaish@iitk.ac.in\r
   7  * Contact: <my_scripts2001@yahoo.com>, <gvaish@iitk.ac.in>, <gonzalo@ximian.com>\r
   8  * Implementation: yes\r
   9  * Status:  95%\r
  10  *\r
  11  * (C) Gaurav Vaish (2002)\r
  12  * (c) 2002 Ximian, Inc. (http://www.ximian.com)\r
  13  */\r
  14 \r
  15 using System;\r
  16 using System.ComponentModel;\r
  17 using System.IO;\r
  18 using System.Xml;\r
  19 using System.Xml.Xsl;\r
  20 using System.Xml.XPath;\r
  21 using System.Web;\r
  22 using System.Web.UI;\r
  23 \r
  24 namespace System.Web.UI.WebControls\r
  25 {\r
  26         [DefaultProperty("DocumentSource")]\r
  27         [PersistChildren(false)]\r
  28         public class Xml : Control\r
  29         {\r
  30                 private XmlDocument      document;\r
  31                 private string           documentContent;\r
  32                 private string           documentSource;\r
  33                 private XslTransform     transform;\r
  34                 private XsltArgumentList transformArgumentList;\r
  35                 private string           transformSource;\r
  36 \r
  37                 private XPathDocument xpathDoc;\r
  38 \r
  39                 private static XslTransform defaultTransform;\r
  40 \r
  41                 static Xml()\r
  42                 {\r
  43                         XmlTextReader reader = new XmlTextReader(new StringReader("<xsl:stylesheet version='1.0' " +\r
  44                                                                 "xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>" +\r
  45                                                                 "<xsl:template match=\"*\">" +\r
  46                                                                 "<xsl:copy-of select=\".\"/>" +\r
  47                                                                 "</xsl:template>" +\r
  48                                                                 "</xsl:stylesheet>"));\r
  49                         defaultTransform = new XslTransform();\r
  50                         defaultTransform.Load(reader);\r
  51                 }\r
  52 \r
  53                 public Xml(): base()\r
  54                 {\r
  55                 }\r
  56 \r
  57                 [MonoTODO("security")]\r
  58                 private void LoadXmlDoc ()\r
  59                 {\r
  60                         if (documentContent != null && documentContent.Length > 0) {\r
  61                                 document = new XmlDocument();\r
  62                                 document.LoadXml (documentContent);\r
  63                                 return;\r
  64                         }\r
  65 \r
  66                         if (documentSource != null && documentSource.Length != 0) {\r
  67                                 document = new XmlDocument();\r
  68                                 document.Load (documentSource);\r
  69                         }\r
  70                 }\r
  71 \r
  72                 public XmlDocument Document\r
  73                 {\r
  74                         get\r
  75                         {\r
  76                                 if(document == null)\r
  77                                         LoadXmlDoc();\r
  78                                 return document;\r
  79                         }\r
  80                         set\r
  81                         {\r
  82                                 documentSource  = null;\r
  83                                 documentContent = null;\r
  84                                 xpathDoc        = null;\r
  85                                 document        = value;\r
  86                         }\r
  87                 }\r
  88 \r
  89                 public string DocumentContent\r
  90                 {\r
  91                         get\r
  92                         {\r
  93                                 return String.Empty;\r
  94                         }\r
  95                         set\r
  96                         {\r
  97                                 document        = null;\r
  98                                 xpathDoc        = null;\r
  99                                 documentContent = value;\r
 100                         }\r
 101                 }\r
 102 \r
 103                 public string DocumentSource\r
 104                 {\r
 105                         get\r
 106                         {\r
 107                                 if(documentSource != null)\r
 108                                         return documentSource;\r
 109                                 return String.Empty;\r
 110                         }\r
 111                         set\r
 112                         {\r
 113                                 document        = null;\r
 114                                 documentContent = null;\r
 115                                 xpathDoc        = null;\r
 116                                 documentSource  = MapPathSecure (value);\r
 117                         }\r
 118                 }\r
 119 \r
 120                 public XslTransform Transform\r
 121                 {\r
 122                         get\r
 123                         {\r
 124                                 return transform;\r
 125                         }\r
 126                         set\r
 127                         {\r
 128                                 transformSource = null;\r
 129                                 transform       = value;\r
 130                         }\r
 131                 }\r
 132 \r
 133                 public string TransformSource\r
 134                 {\r
 135                         get\r
 136                         {\r
 137                                 if(transformSource != null)\r
 138                                         return transformSource;\r
 139                                 return String.Empty;\r
 140                         }\r
 141                         set\r
 142                         {\r
 143                                 transform       = null;\r
 144                                 transformSource = value;\r
 145                         }\r
 146                 }\r
 147 \r
 148                 public XsltArgumentList TransformArgumentList\r
 149                 {\r
 150                         get\r
 151                         {\r
 152                                 return transformArgumentList;\r
 153                         }\r
 154                         set\r
 155                         {\r
 156                                 transformArgumentList = value;\r
 157                         }\r
 158                 }\r
 159 \r
 160                 protected override void AddParsedSubObject(object obj)\r
 161                 {\r
 162                         if(obj is LiteralControl)\r
 163                         {\r
 164                                 DocumentContent = ((LiteralControl)obj).Text;\r
 165                                 return;\r
 166                         }\r
 167                         throw new HttpException (HttpRuntime.FormatResourceString (\r
 168                                                         "Cannot_Have_Children_of_Type",\r
 169                                                         "Xml",\r
 170                                                         GetType().Name));\r
 171                 }\r
 172 \r
 173                 [MonoTODO("security")]\r
 174                 private void LoadXpathDoc ()\r
 175                 {\r
 176                         if(documentContent != null && documentContent.Length > 0) {\r
 177                                 xpathDoc = new XPathDocument (new StringReader (documentContent));\r
 178                                 return;\r
 179                         }\r
 180 \r
 181                         if (documentSource != null && documentSource.Length != 0) {\r
 182                                 xpathDoc = new XPathDocument (MapPathSecure (documentSource));\r
 183                                 return;\r
 184                         }\r
 185                 }\r
 186 \r
 187                 [MonoTODO("security")]\r
 188                 private void LoadTransform ()\r
 189                 {\r
 190                         if (transform != null)\r
 191                                 return;\r
 192 \r
 193                         if (transformSource != null && transformSource.Length != 0) {\r
 194                                 transform = new XslTransform ();\r
 195                                 transform.Load (MapPathSecure (transformSource));\r
 196                         }\r
 197                 }\r
 198 \r
 199                 protected override void Render(HtmlTextWriter output)\r
 200                 {\r
 201                         if(document == null)\r
 202                         {\r
 203                                 LoadXpathDoc();\r
 204                         }\r
 205 \r
 206                         LoadTransform();\r
 207                         if(document == null && xpathDoc == null)\r
 208                         {\r
 209                                 return;\r
 210                         }\r
 211                         if(transform == null)\r
 212                         {\r
 213                                 transform = defaultTransform;\r
 214                         }\r
 215                         if(document != null)\r
 216                         {\r
 217                                 Transform.Transform(document, transformArgumentList, output);\r
 218                                 return;\r
 219                         }\r
 220                         Transform.Transform(xpathDoc, transformArgumentList, output);\r
 221                 }\r
 222         }\r
 223 }\r
 224 \r