mcs/class/System.Web/System.Web.Compilation/TagAttributes.cs

   1 //
   2 // System.Web.Compilation.TagAttributes
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //
   7 // (C) 2003 Ximian, Inc (http://www.ximian.com)
   8 // (C) 2003-2009 Novell, Inc (http://novell.com/)
   9 //
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System;
  33 using System.Collections;
  34 using System.Globalization;
  35 using System.Text;
  36 using System.Web.Util;
  37
  38 namespace System.Web.Compilation
  39 {
  40         sealed class TagAttributes
  41         {
  42                 Hashtable atts_hash;
  43                 Hashtable tmp_hash;
  44                 ArrayList keys;
  45                 ArrayList values;
  46                 bool got_hashed;
  47
  48                 public TagAttributes ()
  49                 {
  50                         got_hashed = false;
  51                         keys = new ArrayList ();
  52                         values = new ArrayList ();
  53                 }
  54
  55                 void MakeHash ()
  56                 {
  57                         atts_hash = new Hashtable (StringComparer.InvariantCultureIgnoreCase);
  58                         for (int i = 0; i < keys.Count; i++) {
  59                                 CheckServerKey (keys [i]);
  60                                 atts_hash.Add (keys [i], values [i]);
  61                         }
  62                         got_hashed = true;
  63                         keys = null;
  64                         values = null;
  65                 }
  66
  67                 public bool IsRunAtServer ()
  68                 {
  69                         return got_hashed;
  70                 }
  71
  72                 public void Add (object key, object value)
  73                 {
  74                         if (key != null && value != null &&
  75                             0 == String.Compare ((string) key,  "runat", true, Helpers.InvariantCulture)) {
  76                                 if (0 != String.Compare ((string) value,  "server", true))
  77                                         throw new HttpException ("runat attribute must have a 'server' value");
  78
  79                                 if (got_hashed)
  80                                         return; // ignore duplicate runat="server"
  81
  82                                 MakeHash ();
  83                         }
  84
  85                         if (value != null)
  86                                 value = HttpUtility.HtmlDecode (value.ToString ());
  87
  88                         if (got_hashed) {
  89                                 CheckServerKey (key);
  90                                 if (atts_hash.ContainsKey (key))
  91                                         throw new HttpException ("Tag contains duplicated '" + key +
  92                                                                  "' attributes.");
  93                                 atts_hash.Add (key, value);
  94                         } else {
  95                                 keys.Add (key);
  96                                 values.Add (value);
  97                         }
  98                 }
  99
 100                 public ICollection Keys
 101                 {
 102                         get { return (got_hashed ? atts_hash.Keys : keys); }
 103                 }
 104
 105                 public ICollection Values
 106                 {
 107                         get { return (got_hashed ? atts_hash.Values : values); }
 108                 }
 109
 110                 int CaseInsensitiveSearch (string key)
 111                 {
 112                         // Hope not to have many attributes when the tag is not a server tag...
 113                         for (int i = 0; i < keys.Count; i++){
 114                                 if (0 == String.Compare ((string) keys [i], key, true, Helpers.InvariantCulture))
 115                                         return i;
 116                         }
 117                         return -1;
 118                 }
 119
 120                 public object this [object key]
 121                 {
 122                         get {
 123                                 if (got_hashed)
 124                                         return atts_hash [key];
 125
 126                                 int idx = CaseInsensitiveSearch ((string) key);
 127                                 if (idx == -1)
 128                                         return null;
 129
 130                                 return values [idx];
 131                         }
 132
 133                         set {
 134                                 if (got_hashed) {
 135                                         CheckServerKey (key);
 136                                         atts_hash [key] = value;
 137                                 } else {
 138                                         int idx = CaseInsensitiveSearch ((string) key);
 139                                         keys [idx] = value;
 140                                 }
 141                         }
 142                 }
 143
 144                 public int Count
 145                 {
 146                         get { return (got_hashed ? atts_hash.Count : keys.Count);}
 147                 }
 148
 149                 public bool IsDataBound (string att)
 150                 {
 151                         if (att == null || !got_hashed)
 152                                 return false;
 153
 154                         return (StrUtils.StartsWith (att, "<%#") && StrUtils.EndsWith (att, "%>"));
 155                 }
 156
 157                 public IDictionary GetDictionary (string key)
 158                 {
 159                         if (got_hashed)
 160                                 return atts_hash;
 161
 162                         if (tmp_hash == null)
 163                                 tmp_hash = new Hashtable (StringComparer.InvariantCultureIgnoreCase);
 164
 165                         tmp_hash.Clear ();
 166                         for (int i = keys.Count - 1; i >= 0; i--)
 167                                 if (key == null || String.Compare (key, (string) keys [i], true, Helpers.InvariantCulture) == 0)
 168                                         tmp_hash [keys [i]] = values [i];
 169
 170                         return tmp_hash;
 171                 }
 172
 173                 public override string ToString ()
 174                 {
 175                         StringBuilder result = new StringBuilder ("TagAttributes {");
 176                         string value;
 177                         foreach (string key in Keys){
 178                                 result.Append ('[');
 179                                 result.Append (key);
 180                                 value = this [key] as string;
 181                                 if (value != null)
 182                                         result.AppendFormat ("=\"{0}\"", value);
 183
 184                                 result.Append ("] ");
 185                         }
 186
 187                         if (result.Length > 0 && result [result.Length - 1] == ' ')
 188                                 result.Length--;
 189
 190                         result.Append ('}');
 191                         if (IsRunAtServer ())
 192                                 result.Append (" @Server");
 193
 194                         return result.ToString ();
 195                 }
 196
 197                 void CheckServerKey (object key)
 198                 {
 199                         if (key == null || ((string)key).Length == 0)
 200                                 throw new HttpException ("The server tag is not well formed.");
 201                 }
 202         }
 203 }
 204