MonoRail/Castle.MonoRail.Views.Brail/Macros/OutputMacro.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 Boo.Lang;
  17         using Boo.Lang.Compiler;
  18         using Boo.Lang.Compiler.Ast;
  19         using Boo.Lang.Extensions;
  20         using Castle.MonoRail.Framework;
  21
  22         // This take statements such as:
  23         //  output "something"
  24         // and turn them into:
  25         //  outputStream.Write("something")
  26         public class OutputMacro : LexicalInfoPreservingMacro
  27         {
  28                 private static readonly ReferenceExpression output = AstUtil.CreateReferenceExpression("OutputStream.Write");
  29
  30                 private static void UnescapeInitialAndClosingDoubleQuotes(MacroStatement macro)
  31                 {
  32                         StringLiteralExpression value = macro.Arguments[0] as StringLiteralExpression;
  33                         if(value==null)
  34                                 return;
  35                         value.Value = BrailPreProcessor.UnescapeInitialAndClosingDoubleQuotes(value.Value);
  36                 }
  37
  38             protected override Statement ExpandImpl(MacroStatement macro)
  39             {
  40             if (macro.Arguments.Count == 0)
  41                 throw new MonoRailException("output must be called with arguemnts");
  42             UnescapeInitialAndClosingDoubleQuotes(macro);
  43                 return PrintMacroModule.expandPrintMacro(macro, output, output);
  44             }
  45         }
  46 }