mcs/class/System.Web/System.Web.Configuration/WebControlsSectionHandler.cs

   1 //
   2 // System.Web.Configuration.WebControlsSectionHandler
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //
   7 // (C) 2003 Ximian, Inc (http://www.ximian.com)
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32 using System.Configuration;
  33 using System.IO;
  34 using System.Web;
  35 using System.Xml;
  36
  37 namespace System.Web.Configuration
  38 {
  39         class WebControlsConfig
  40         {
  41                 volatile static WebControlsConfig instance;
  42                 string scriptsVDir;
  43                 string configFilePath;
  44                 static readonly object lockobj = new object ();
  45
  46                 public WebControlsConfig (WebControlsConfig parent, object context)
  47                 {
  48                         configFilePath = context as string;
  49                         if (parent == null)
  50                                 return;
  51
  52                         scriptsVDir = parent.scriptsVDir;
  53                         if (scriptsVDir != null)
  54                                 configFilePath = parent.configFilePath;
  55                 }
  56
  57                 public void SetClientScriptsLocation (string location, out string error)
  58                 {
  59                         error = null;
  60                         if (location == null || location.Length == 0) {
  61                                 error = "empty or null value for clientScriptsLocation";
  62                                 return;
  63                         }
  64
  65                         if (location [0] != '/')
  66                                 location = "/" + location;
  67
  68                         string [] splitted = location.Split ('/');
  69                         int end = splitted.Length;
  70                         for (int i = 0; i < end; i++)
  71                                 splitted [i] = HttpUtility.UrlEncode (splitted [i]);
  72
  73                         scriptsVDir = String.Join ("/", splitted);
  74                 }
  75
  76                 public string ScriptsPhysicalDirectory {
  77                         get { return Path.Combine (Path.GetDirectoryName (configFilePath), "web_scripts"); }
  78                 }
  79
  80                 public string ScriptsVirtualDirectory {
  81                         get { return scriptsVDir; }
  82                         set { scriptsVDir = value; }
  83                 }
  84
  85                 static public WebControlsConfig Instance {
  86                         get {
  87                                 //TODO: use HttpContext to get the configuration
  88                                 if (instance != null)
  89                                         return instance;
  90
  91                                 lock (lockobj) {
  92                                         if (instance != null)
  93                                                 return instance;
  94
  95                                         instance = (WebControlsConfig) ConfigurationSettings.GetConfig ("system.web/webControls");
  96                                 }
  97
  98                                 return instance;
  99                         }
 100                 }
 101         }
 102
 103         class WebControlsSectionHandler : IConfigurationSectionHandler
 104         {
 105                 public object Create (object parent, object context, XmlNode section)
 106                 {
 107                         WebControlsConfig config = new WebControlsConfig (parent as WebControlsConfig, context);
 108
 109                         if (section.Attributes == null && section.Attributes.Count == 0)
 110                                 ThrowException ("Lack of clientScriptsLocation attribute", section);
 111
 112                         string clientLocation = AttValue ("clientScriptsLocation", section, false);
 113                         if (section.Attributes != null && section.Attributes.Count != 0)
 114                                 HandlersUtil.ThrowException ("Unrecognized attribute", section);
 115
 116                         string error;
 117                         config.SetClientScriptsLocation (clientLocation, out error);
 118                         if (error != null)
 119                                 HandlersUtil.ThrowException (error, section);
 120
 121                         return config;
 122                 }
 123
 124                 // To save some typing...
 125                 static string AttValue (string name, XmlNode node, bool optional)
 126                 {
 127                         return HandlersUtil.ExtractAttributeValue (name, node, optional);
 128                 }
 129
 130                 static void ThrowException (string message, XmlNode node)
 131                 {
 132                         HandlersUtil.ThrowException (message, node);
 133                 }
 134                 //
 135         }
 136 }
 137