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

   1 //
   2 // ChtmlTextWriter.cs: Compact HTML
   3 //
   4 // Author:
   5 //      Cesar Lopez Nataren <cnataren@novell.com>
   6 //
   7
   8 //
   9 // Copyright (C) 2006 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 #if NET_2_0
  32
  33 using System;
  34 using System.IO;
  35 using System.Collections;
  36
  37 namespace System.Web.UI {
  38
  39         public class ChtmlTextWriter : Html32TextWriter
  40         {
  41                 static Hashtable global_suppressed_attrs;
  42
  43                 static string [] global_suppressed_attributes = {
  44                         "onclick", "ondblclick", "onmousedown", "onmouseup",
  45                         "onmouseover", "onmousemove", "onmouseout",
  46                         "onkeypress", "onkeydown", "onkeyup"
  47                 };
  48
  49                 static string [] recognized_attributes = {"div", "span"};
  50
  51                 Hashtable recognized_attrs = new Hashtable (recognized_attributes.Length);
  52                 Hashtable suppressed_attrs = new Hashtable (recognized_attributes.Length);
  53
  54                 static ChtmlTextWriter ()
  55                 {
  56                         SetupGlobalSuppressedAttrs (global_suppressed_attributes);
  57                 }
  58
  59                 static void SetupGlobalSuppressedAttrs (string [] attrs)
  60                 {
  61                         global_suppressed_attrs = new Hashtable ();
  62                         PopulateHash (global_suppressed_attrs, global_suppressed_attributes);
  63                 }
  64
  65                 static void PopulateHash (Hashtable hash, string [] keys)
  66                 {
  67                         foreach (string key in keys)
  68                                 hash.Add (key, true);
  69                 }
  70
  71                 public ChtmlTextWriter (TextWriter writer)
  72                         : this (writer, DefaultTabString)
  73                 {
  74                 }
  75
  76                 public ChtmlTextWriter (TextWriter writer, string tabString)
  77                         : base (writer, tabString)
  78                 {
  79                         //
  80                         // setup the recognized attrs
  81                         //
  82                         foreach (string key in recognized_attributes)
  83                                 recognized_attrs.Add (key, new Hashtable ());
  84
  85                         SetupSuppressedAttrs ();
  86                 }
  87
  88
  89                 void SetupSuppressedAttrs ()
  90                 {
  91                         //
  92                         // we don't make these static because they are not read-only
  93                         //
  94                         string [] div_suppressed_attributes = {
  95                                 "accesskey", "cellspacing", "cellpadding",
  96                                 "gridlines", "rules"
  97                         };
  98
  99                         string [] span_suppressed_attributes = {
 100                                 "cellspacing", "cellpadding",
 101                                 "gridlines", "rules"
 102                         };
 103
 104                         Init ("div", div_suppressed_attributes, suppressed_attrs);
 105                         Init ("span", span_suppressed_attributes, suppressed_attrs);
 106                 }
 107
 108                 static void Init (string key, string [] attrs, Hashtable container)
 109                 {
 110                         Hashtable attrs_hash = new Hashtable (attrs.Length);
 111                         PopulateHash (attrs_hash, attrs);
 112                         container.Add (key, attrs_hash);
 113                 }
 114
 115                 protected Hashtable GlobalSuppressedAttributes {
 116                         get { return global_suppressed_attrs; }
 117                 }
 118
 119                 protected Hashtable RecognizedAttributes {
 120                         get { return recognized_attrs; }
 121                 }
 122
 123                 protected Hashtable SuppressedAttributes {
 124                         get { return suppressed_attrs; }
 125                 }
 126
 127                 public virtual void AddRecognizedAttribute (string elementName, string attributeName)
 128                 {
 129                         Hashtable elem_attrs = (Hashtable) recognized_attrs [elementName];
 130
 131                         if (elem_attrs == null) {
 132                                 elem_attrs = new Hashtable ();
 133                                 elem_attrs.Add (attributeName, true);
 134                                 recognized_attrs.Add (elementName, elem_attrs);
 135                         } else
 136                                 elem_attrs.Add (attributeName, true);
 137                 }
 138
 139                 public virtual void RemoveRecognizedAttribute (string elementName, string attributeName)
 140                 {
 141                         Hashtable elem_attrs = (Hashtable) recognized_attrs [elementName];
 142
 143                         if (elem_attrs != null)
 144                                 elem_attrs.Remove (attributeName);
 145                 }
 146
 147                 //
 148                 // writes <br>
 149                 //
 150                 public override void WriteBreak ()
 151                 {
 152                         string br = GetTagName (HtmlTextWriterTag.Br);
 153                         WriteBeginTag (br);
 154                         Write (TagRightChar);
 155                 }
 156
 157                 public override void WriteEncodedText (string text)
 158                 {
 159                         base.WriteEncodedText (text);
 160                 }
 161
 162                 Hashtable attr_render = new Hashtable ();
 163
 164                 [MonoTODO]
 165                 protected override bool OnAttributeRender (string name, string value, HtmlTextWriterAttribute key)
 166                 {
 167                         // I checked every possible HtmlTextWriterAttribute key
 168                         // and always throws ArgumentNullException.
 169                         return (bool) attr_render [null];
 170                 }
 171
 172                 protected override bool OnStyleAttributeRender (string styleAttrName, string value, HtmlTextWriterStyle key)
 173                 {
 174                         return key == HtmlTextWriterStyle.Display;
 175                 }
 176
 177                 protected override bool OnTagRender (string name, HtmlTextWriterTag tag)
 178                 {
 179                         return tag != HtmlTextWriterTag.Span;
 180                 }
 181         }
 182 }
 183
 184 #endif