mcs/class/System.XML/Mono.Xml.Xsl.Operations/XslProcessingInstruction.cs

   1 //
   2 // XslProcessingInstruction.cs
   3 //
   4 // Authors:
   5 //      Ben Maurer (bmaurer@users.sourceforge.net)
   6 //      Atsushi Enomoto (ginga@kit.hi-ho.ne.jp)
   7 //
   8 // (C) 2003 Ben Maurer
   9 // (C) 2003 Atsushi Enomoto
  10 //
  11
  12 using System;
  13 using System.Collections;
  14 using System.Xml;
  15 using System.Xml.XPath;
  16 using System.Xml.Xsl;
  17 using System.IO;
  18
  19 namespace Mono.Xml.Xsl.Operations {
  20         public class XslProcessingInstruction : XslCompiledElement {
  21                 XslAvt name;
  22                 XslOperation value;
  23
  24                 public XslProcessingInstruction (Compiler c) : base (c) {}
  25
  26                 protected override void Compile (Compiler c)
  27                 {
  28                         name = c.ParseAvtAttribute ("name");
  29
  30                         if (c.Input.MoveToFirstAttribute ()) {
  31                                 do {
  32                                         if (c.Input.NamespaceURI == String.Empty && c.Input.LocalName != "name")
  33                                                 throw new XsltCompileException ("Invalid attribute \"" + c.Input.Name + "\"", null, c.Input);
  34                                 } while (c.Input.MoveToNextAttribute ());
  35                                 c.Input.MoveToParent ();
  36                         }
  37
  38                         if (!c.Input.MoveToFirstChild ()) return;
  39
  40                         value = c.CompileTemplateContent (XPathNodeType.ProcessingInstruction);
  41                         c.Input.MoveToParent ();
  42                 }
  43
  44                 public override void Evaluate (XslTransformProcessor p)
  45                 {
  46                         StringWriter s = new StringWriter ();
  47                         Outputter outputter = new TextOutputter(s, true);
  48                         p.PushOutput (outputter);
  49                         value.Evaluate (p);
  50                         p.PopOutput ();
  51
  52                         string actualName = name.Evaluate (p);
  53                         if (actualName.ToLower () == "xml")
  54                                 throw new XsltException ("Processing instruction name was evaluated to \"xml\"", null, p.CurrentNode);
  55                         p.Out.WriteProcessingInstruction (actualName, s.ToString ());
  56                 }
  57         }
  58 }