mcs/class/System.Web/System.Web.UI/XhtmlTextWriter.cs

   1 //
   2 // XhtmlTextWriter.cs
   3 //
   4 // Author:
   5 //      Cesar Lopez Nataren <cnataren@novell.com>
   6 //
   7
   8 //
   9 // Copyright (C) 2006-2010 Novell, Inc (http://www.novell.com)
  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.IO;
  32 using System.Collections;
  33
  34 namespace System.Web.UI
  35 {
  36         public class XhtmlTextWriter : HtmlTextWriter
  37         {
  38                 static Hashtable default_common_attrs;
  39                 static Hashtable default_suppress_common_attrs;
  40                 static Hashtable default_element_specific_attrs;
  41
  42                 Hashtable common_attrs;
  43                 Hashtable suppress_common_attrs;
  44                 Hashtable element_specific_attrs;
  45
  46                 static XhtmlTextWriter ()
  47                 {
  48                         default_common_attrs = new Hashtable (DefaultCommonAttributes.Length);
  49                         SetupHash (default_common_attrs, DefaultCommonAttributes);
  50                         default_suppress_common_attrs = new Hashtable (DefaultSuppressCommonAttributes.Length);
  51                         SetupHash (default_suppress_common_attrs, DefaultSuppressCommonAttributes);
  52                         SetupElementsSpecificAttributes ();
  53                 }
  54
  55                 static void SetupHash (Hashtable hash, string [] values)
  56                 {
  57                         foreach (string str in values)
  58                                 hash.Add (str, true);
  59                 }
  60
  61                 static string [] DefaultCommonAttributes = {
  62                         "class",
  63                         "id",
  64                         "title",
  65                         "xml:lang"
  66                 };
  67
  68                 //
  69                 // XHTML elements whose CommonAttributes are supressed
  70                 //
  71                 static string [] DefaultSuppressCommonAttributes = {
  72                         "base",
  73                         "meta",
  74                         "br",
  75                         "head",
  76                         "title",
  77                         "html",
  78                         "style"
  79                 };
  80
  81                 static void SetupElementsSpecificAttributes ()
  82                 {
  83                         default_element_specific_attrs = new Hashtable ();
  84                         string [] a_attrs_names = {"accesskey", "href", "charset", "hreflang", "rel", "type", "rev", "title", "tabindex"};
  85                         SetupElementSpecificAttributes ("a", a_attrs_names);
  86
  87                         string [] base_attrs_names = {"href"};
  88                         SetupElementSpecificAttributes ("base", base_attrs_names);
  89
  90                         string [] blockquote_attrs_names = {"cite"};
  91                         SetupElementSpecificAttributes ("blockquote", blockquote_attrs_names);
  92
  93                         string [] br_attrs_names = {"id", "class", "title"};
  94                         SetupElementSpecificAttributes ("br", br_attrs_names);
  95
  96                         string [] form_attrs_names = {"action", "method", "enctype"};
  97                         SetupElementSpecificAttributes ("form", form_attrs_names);
  98
  99                         string [] head_attrs_names = {"xml:lang"};
 100                         SetupElementSpecificAttributes ("head", head_attrs_names);
 101
 102                         string [] html_attrs_names = {"version", "xml:lang", "xmlns"};
 103                         SetupElementSpecificAttributes ("html", html_attrs_names);
 104
 105                         string [] img_attrs_names = {"src", "alt", "width", "longdesc", "height"};
 106                         SetupElementSpecificAttributes ("img", img_attrs_names);
 107
 108                         string [] input_attrs_names = {"size", "accesskey", "title", "name", "type", "disabled",
 109                                                        "value", "src", "checked", "maxlength", "tabindex"};
 110                         SetupElementSpecificAttributes ("input", input_attrs_names);
 111
 112                         string [] label_attrs_names = {"accesskey", "for"};
 113                         SetupElementSpecificAttributes ("label", label_attrs_names);
 114
 115                         string [] li_attrs_names = {"value"};
 116                         SetupElementSpecificAttributes ("li", li_attrs_names);
 117
 118                         string [] link_attrs_names = {"hreflang", "rev", "type", "charset", "rel", "href", "media"};
 119                         SetupElementSpecificAttributes ("link", link_attrs_names);
 120
 121                         string [] meta_attrs_names = {"content", "name", "xml:lang", "http-equiv", "scheme"};
 122                         SetupElementSpecificAttributes ("meta", meta_attrs_names);
 123
 124                         string [] object_attrs_names = {"codebase", "classid", "data", "standby", "name", "type",
 125                                                         "height", "archive", "declare", "width", "tabindex", "codetype"};
 126                         SetupElementSpecificAttributes ("object", object_attrs_names);
 127
 128                         string [] ol_attrs_names = {"start"};
 129                         SetupElementSpecificAttributes ("ol", ol_attrs_names);
 130
 131                         string [] optgroup_attrs_names = {"label", "disabled"};
 132                         SetupElementSpecificAttributes ("optgroup", optgroup_attrs_names);
 133
 134                         string [] option_attrs_names = {"selected", "value"};
 135                         SetupElementSpecificAttributes ("option", option_attrs_names);
 136
 137                         string [] param_attrs_names = {"id", "name", "valuetype", "value", "type"};
 138                         SetupElementSpecificAttributes ("param", param_attrs_names);
 139
 140                         string [] pre_attrs_names = {"xml:space"};
 141                         SetupElementSpecificAttributes ("pre", pre_attrs_names);
 142
 143                         string [] q_attrs_names = {"cite"};
 144                         SetupElementSpecificAttributes ("q", q_attrs_names);
 145
 146                         string [] select_attrs_names = {"name", "tabindex", "disabled", "multiple", "size"};
 147                         SetupElementSpecificAttributes ("select", select_attrs_names);
 148
 149                         string [] style_attrs_names = {"xml:lang", "xml:space", "type", "title", "media"};
 150                         SetupElementSpecificAttributes ("style", style_attrs_names);
 151
 152                         string [] table_attrs_names = {"width", "summary"};
 153                         SetupElementSpecificAttributes ("table", table_attrs_names);
 154
 155                         string [] textarea_attrs_names = {"name", "cols", "accesskey", "tabindex", "rows"};
 156                         SetupElementSpecificAttributes ("textarea", textarea_attrs_names);
 157
 158                         string [] td_and_th_attrs_names = {"headers", "align", "rowspan", "colspan", "axis",
 159                                                            "scope", "abbr", "valign"};
 160                         SetupElementSpecificAttributes ("td", td_and_th_attrs_names);
 161                         SetupElementSpecificAttributes ("th", td_and_th_attrs_names);
 162
 163                         string [] title_attrs_names = {"xml:lang"};
 164                         SetupElementSpecificAttributes ("title", title_attrs_names);
 165
 166                         string [] tr_attrs_names = {"align", "valign"};
 167                         SetupElementSpecificAttributes ("tr", tr_attrs_names);
 168                 }
 169
 170                 static void SetupElementSpecificAttributes (string elementName, string [] attributesNames)
 171                 {
 172                         Hashtable attrs = new Hashtable (attributesNames.Length);
 173                         SetupHash (attrs, attributesNames);
 174                         default_element_specific_attrs.Add (elementName, attrs);
 175                 }
 176
 177                 public XhtmlTextWriter (TextWriter writer)
 178                         : this (writer, DefaultTabString)
 179                 {
 180                 }
 181
 182                 public XhtmlTextWriter (TextWriter writer, string tabString)
 183                         : base (writer, tabString)
 184                 {
 185                 }
 186
 187                 protected Hashtable CommonAttributes {
 188                         get {
 189                                 if (common_attrs == null)
 190                                         common_attrs = (Hashtable) default_common_attrs.Clone ();
 191                                 return common_attrs;
 192                         }
 193                 }
 194
 195                 protected Hashtable ElementSpecificAttributes {
 196                         get {
 197                                 if (element_specific_attrs == null)
 198                                         element_specific_attrs = (Hashtable) default_element_specific_attrs.Clone ();
 199                                 return element_specific_attrs;
 200                         }
 201                 }
 202
 203                 protected Hashtable  SuppressCommonAttributes {
 204                         get {
 205                                 if (suppress_common_attrs == null)
 206                                         suppress_common_attrs = (Hashtable) default_suppress_common_attrs.Clone ();
 207                                 return suppress_common_attrs;
 208                         }
 209                 }
 210
 211                 public virtual void AddRecognizedAttribute (string elementName, string attributeName)
 212                 {
 213                         Hashtable elem_attrs = (Hashtable) ElementSpecificAttributes [elementName];
 214
 215                         if (elem_attrs == null) {
 216                                 Hashtable attrs = new Hashtable ();
 217                                 attrs.Add (attributeName, true);
 218                                 ElementSpecificAttributes.Add (elementName, attrs);
 219                         } else
 220                                 elem_attrs.Add (attributeName, true);
 221                 }
 222
 223                 public override bool IsValidFormAttribute (string attributeName)
 224                 {
 225                         return attributeName == "action" || attributeName == "method" || attributeName == "enctype";
 226                 }
 227
 228                 public virtual void RemoveRecognizedAttribute (string elementName, string attributeName)
 229                 {
 230                         Hashtable elem_attrs = (Hashtable) ElementSpecificAttributes [elementName];
 231
 232                         if (elem_attrs != null)
 233                                 elem_attrs.Remove (attributeName);
 234                 }
 235
 236                 public virtual void SetDocType (XhtmlMobileDocType docType)
 237                 {
 238                         //doc_type = docType;
 239                 }
 240
 241                 // writes <br/>
 242                 public override void WriteBreak ()
 243                 {
 244                         string tag = GetTagName (HtmlTextWriterTag.Br);
 245                         WriteBeginTag (tag);
 246                         Write (SlashChar);
 247                         Write (TagRightChar);
 248                 }
 249
 250                 protected override bool OnAttributeRender (string name, string value, HtmlTextWriterAttribute key)
 251                 {
 252                         // I tested every possible value of HtmlTextWriterAttribute
 253                         // and the MS implementation always throws ArgumentNullException
 254                         throw new ArgumentNullException ();
 255                 }
 256
 257                 protected override bool OnStyleAttributeRender (string name, string value, HtmlTextWriterStyle key)
 258                 {
 259                         // I tested every possible value of HtmlTextWriterStyle
 260                         // and the MS implementation always returned false. Sigh
 261                         return false;
 262                 }
 263         }
 264 }