2005-02-09 Atsushi Enomoto <atsushi@ximian.com>
[mono.git] / 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                 
44                 public XslForEach (Compiler c) : base (c) {}
45                 
46                 protected override void Compile (Compiler c)
47                 {
48                         c.AssertAttribute ("select");
49                         select = c.CompileExpression (c.GetAttribute ("select"));
50                         
51                         if (c.Input.MoveToFirstChild ()) {
52                                 bool alldone = true;
53                                 do {
54                                         if (c.Input.NodeType == XPathNodeType.Text)
55                                                 { alldone = false; break; }
56                                         
57                                         if (c.Input.NodeType != XPathNodeType.Element)
58                                                 continue;
59                                         if (c.Input.NamespaceURI != Compiler.XsltNamespace)
60                                                 { alldone = false; break; }
61                                         if (c.Input.LocalName != "sort")
62                                                 { alldone = false; break; }
63                                                 
64                                         c.AddSort (select, new Sort (c));
65                                         
66                                 } while (c.Input.MoveToNext ());
67                                 if (!alldone)
68                                         children = c.CompileTemplateContent ();
69                                 c.Input.MoveToParent ();
70                         }
71                 }
72                 
73                 public override void Evaluate (XslTransformProcessor p)
74                 {
75                         if (children == null)
76                                 return;
77
78                         p.PushNodeset (p.Select (select));
79                         p.PushForEachContext ();
80                         
81                         while (p.NodesetMoveNext ())
82                                 children.Evaluate (p);
83                         p.PopForEachContext();
84                         p.PopNodeset ();
85                 }
86         }
87 }