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

   1 //
   2 // XslApplyTemplates.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
  18 namespace Mono.Xml.Xsl.Operations {
  19
  20         public class XslApplyTemplates : XslCompiledElement {
  21                 XPathExpression select;
  22                 XmlQualifiedName mode;
  23                 ArrayList withParams = new ArrayList ();
  24
  25                 public XslApplyTemplates (Compiler c) : base (c) {}
  26
  27                 protected override void Compile (Compiler c)
  28                 {
  29                         select = c.CompileExpression (c.GetAttribute ("select"));
  30                         mode = c.ParseQNameAttribute ("mode");
  31
  32                         if (c.Input.MoveToFirstChild ()) {
  33                                 do {
  34                                         switch (c.Input.NodeType) {
  35                                         case XPathNodeType.Comment:
  36                                         case XPathNodeType.ProcessingInstruction:
  37                                         case XPathNodeType.Whitespace:
  38                                                 continue;
  39                                         case XPathNodeType.Element:
  40                                                 if (c.Input.NamespaceURI != XsltNamespace)
  41                                                         throw new Exception ("unexptected element"); // TODO: fwd compat
  42
  43                                                 switch (c.Input.LocalName)
  44                                                 {
  45                                                         case "with-param":
  46                                                                 withParams.Add (new XslVariableInformation (c));
  47                                                                 break;
  48
  49                                                         case "sort":
  50                                                                 if (select == null)
  51                                                                         select = c.CompileExpression ("*");
  52                                                                 c.AddSort (select, new Sort (c));
  53                                                                 break;
  54                                                         default:
  55                                                                 throw new Exception ("unexptected element"); // todo forwards compat
  56                                                 }
  57                                                 break;
  58                                         default:
  59                                                 throw new Exception ("unexpected node type " + c.Input.NodeType);       // todo forwards compat
  60                                         }
  61                                 } while (c.Input.MoveToNext ());
  62                                 c.Input.MoveToParent ();
  63                         }
  64                 }
  65
  66                 public override void Evaluate (XslTransformProcessor p)
  67                 {
  68                         Hashtable passedParams = null;
  69
  70                         if (withParams.Count > 0) {
  71                                 passedParams = new Hashtable ();
  72                                 foreach (XslVariableInformation param in withParams)
  73                                         passedParams [param.Name] = param.Evaluate (p);
  74                         }
  75
  76                         if (select == null)
  77                                 p.ApplyTemplates (p.CurrentNode.SelectChildren (XPathNodeType.All), mode, passedParams);
  78                         else
  79                                 p.ApplyTemplates (p.Select (select), mode, passedParams);
  80                 }
  81         }
  82 }