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

   1 //
   2 // XslForEach.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 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Collections;
  35 using System.Xml;
  36 using System.Xml.XPath;
  37 using System.Xml.Xsl;
  38
  39 namespace Mono.Xml.Xsl.Operations {
  40         internal class XslForEach : XslCompiledElement {
  41                 XPathExpression select;
  42                 XslOperation children;
  43                 XslSortEvaluator sortEvaluator;
  44
  45                 public XslForEach (Compiler c) : base (c) {}
  46
  47                 protected override void Compile (Compiler c)
  48                 {
  49                         if (c.Debugger != null)
  50                                 c.Debugger.DebugCompile (c.Input);
  51
  52                         c.CheckExtraAttributes ("for-each", "select");
  53
  54                         c.AssertAttribute ("select");
  55                         select = c.CompileExpression (c.GetAttribute ("select"));
  56                         ArrayList sorterList = null;
  57
  58                         if (c.Input.MoveToFirstChild ()) {
  59                                 bool alldone = true;
  60                                 do {
  61                                         if (c.Input.NodeType == XPathNodeType.Text)
  62                                                 { alldone = false; break; }
  63
  64                                         if (c.Input.NodeType != XPathNodeType.Element)
  65                                                 continue;
  66                                         if (c.Input.NamespaceURI != Compiler.XsltNamespace)
  67                                                 { alldone = false; break; }
  68                                         if (c.Input.LocalName != "sort")
  69                                                 { alldone = false; break; }
  70                                         //c.AddSort (select, new Sort (c));
  71                                         if (sorterList == null)
  72                                                 sorterList = new ArrayList ();
  73                                         sorterList.Add (new Sort (c));
  74                                 } while (c.Input.MoveToNext ());
  75                                 if (!alldone)
  76                                         children = c.CompileTemplateContent ();
  77                                 c.Input.MoveToParent ();
  78                         }
  79                         if (sorterList != null)
  80                                 sortEvaluator = new XslSortEvaluator (select,
  81                                         (Sort []) sorterList.ToArray (typeof (Sort)));
  82                 }
  83
  84                 public override void Evaluate (XslTransformProcessor p)
  85                 {
  86                         if (p.Debugger != null)
  87                                 p.Debugger.DebugExecute (p, this.DebugInput);
  88
  89                         if (children == null)
  90                                 return;
  91
  92                         XPathNodeIterator iter = sortEvaluator != null ?
  93                                 sortEvaluator.SortedSelect (p) :
  94                                 p.Select (select);
  95
  96
  97                         while (p.NodesetMoveNext (iter)) {
  98                                 p.PushNodeset (iter);
  99                                 p.PushForEachContext ();
 100                                 children.Evaluate (p);
 101                                 p.PopForEachContext();
 102                                 p.PopNodeset ();
 103                         }
 104                 }
 105         }
 106 }