MonoRail/Castle.MonoRail.Views.Brail/Attributes/OutputMethodAttribute.cs

   1 // Copyright 2004-2007 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 namespace Castle.MonoRail.Views.Brail
  15 {
  16         using System.Web;
  17         using anrControls;
  18         using Boo.Lang.Compiler;
  19         using Boo.Lang.Compiler.Ast;
  20
  21         //base class for the [Html], [Markdown], etc attributes
  22         public abstract class OutputMethodAttribute : AbstractAstAttribute
  23         {
  24                 public override void Apply(Node targetNode)
  25                 {
  26                         Method method = targetNode as Method;
  27                         if (method == null)
  28                         {
  29                                 InvalidNodeForAttribute("method");
  30                                 return;
  31                         }
  32
  33                         method.Body.Accept(new ReturnValueVisitor());
  34                         ReplaceReferences(method.Body, "transform", TransformMethodName);
  35                 }
  36
  37                 public abstract string TransformMethodName { get; }
  38
  39                 private void ReplaceReferences(Node node, string what, string value)
  40                 {
  41                         node.ReplaceNodes(
  42                                 new ReferenceExpression(what),
  43                                 AstUtil.CreateReferenceExpression(value));
  44                 }
  45         }
  46 }