MonoRail/Castle.MonoRail.Views.Brail/HtmlExtension.cs

   1 // Copyright 2004-2008 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.MonoRail.Views.Brail
  16 {
  17         using System.Collections;
  18         using System.Collections.Generic;
  19         using System.IO;
  20         using Boo.Lang;
  21
  22         public class HtmlExtension : IDslLanguageExtension
  23         {
  24                 private readonly TextWriter _output = null;
  25
  26                 public HtmlExtension(TextWriter output)
  27                 {
  28                         _output = output;
  29                 }
  30
  31                 public TextWriter Output
  32                 {
  33                         get { return _output; }
  34                 }
  35
  36                 #region IDslLanguageExtension Members
  37
  38                 public void Tag(string name)
  39                 {
  40                         BlockTag(name, null, null);
  41                 }
  42
  43                 public void Tag(string name, ICallable block)
  44                 {
  45                         BlockTag(name, null, block);
  46                 }
  47
  48                 public void Tag(string name, IDictionary attributes, ICallable block)
  49                 {
  50                         BlockTag(name, attributes, block);
  51                 }
  52
  53                 public void Flush()
  54                 {
  55                         //no op
  56                 }
  57
  58                 #endregion
  59
  60                 private void BlockTag(string tag, IDictionary attributes, ICallable block)
  61                 {
  62                         Output.Write("<{0}", tag);
  63
  64                         List<string> attributeValues = new List<string>();
  65
  66                         if (null != attributes)
  67                         {
  68                                 foreach(DictionaryEntry entry in attributes)
  69                                 {
  70                                         attributeValues.Add(string.Format("{0}=\"{1}\"", entry.Key, entry.Value));
  71                                 }
  72                         }
  73
  74                         if (0 != attributeValues.Count)
  75                         {
  76                                 Output.Write(" ");
  77                                 Output.Write(string.Join(" ", attributeValues.ToArray()));
  78                         }
  79
  80                         Output.Write(">");
  81                         if (block != null)
  82                         {
  83                                 block.Call(null);
  84                         }
  85                         Output.Write("</{0}>", tag);
  86                 }
  87
  88                 public void html(ICallable block)
  89                 {
  90                         BlockTag("html", null, block);
  91                 }
  92
  93                 public void text(string value)
  94                 {
  95                         Output.Write(value);
  96                 }
  97
  98                 public void p(ICallable block)
  99                 {
 100                         p(null, block);
 101                 }
 102
 103                 public void p(IDictionary attributes, ICallable block)
 104                 {
 105                         BlockTag("p", attributes, block);
 106                 }
 107         }
 108 }