typo correction
[mono.git] / mcs / class / System.XML / Mono.Xml.Xsl.Operations / XslChoose.cs
1 //
2 // XslChoose.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 XslChoose : XslCompiledElement {
41                 XslOperation defaultChoice = null;
42                 ArrayList conditions = new ArrayList ();
43                 
44                 public XslChoose (Compiler c) : base (c) {}
45                 
46                 protected override void Compile (Compiler c)
47                 {
48                         if (!c.Input.MoveToFirstChild ())
49                                 throw new XsltCompileException ("Expecting non-empty element", null, c.Input);
50                         
51                         do {
52                                 if (c.Input.NodeType != XPathNodeType.Element) continue;
53                                 if (c.Input.NamespaceURI != XsltNamespace) continue;
54                                 
55                                 if (defaultChoice != null)
56                                         throw new XsltCompileException ("otherwise attribute must be last", null, c.Input);
57
58                                 switch (c.Input.LocalName) {
59                                 case "when":
60                                         conditions.Add (new XslIf (c));
61                                         break;
62                                         
63                                 case "otherwise":
64                                         if (c.Input.MoveToFirstChild ()) {
65                                                 defaultChoice = c.CompileTemplateContent ();
66                                                 c.Input.MoveToParent ();
67                                         }
68                                         break;
69
70                                 default:
71                                         if (c.CurrentStylesheet.Version == "1.0")
72                                                 throw new XsltCompileException ("XSLT choose element accepts only when and otherwise elements", null, c.Input);
73                                         break;
74                                 }
75                         } while (c.Input.MoveToNext ());
76                         
77                         c.Input.MoveToParent ();
78                         
79                         if (conditions.Count == 0)
80                                 throw new XsltCompileException ("Choose must have 1 or more when elements", null, c.Input);
81                 }
82
83                 public override void Evaluate (XslTransformProcessor p)
84                 {
85                         int len = conditions.Count;
86                         for (int i = 0; i < len; i++) {
87                                 if (((XslIf)conditions [i]).EvaluateIfTrue (p))
88                                         return;
89                         }
90                         
91                         if (defaultChoice != null)      
92                                 defaultChoice.Evaluate (p);
93                 }
94
95         }
96 }