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//
// XslChoose.cs
//
// Authors:
// Ben Maurer (bmaurer@users.sourceforge.net)
// Atsushi Enomoto (ginga@kit.hi-ho.ne.jp)
//
// (C) 2003 Ben Maurer
// (C) 2003 Atsushi Enomoto
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Xsl;
namespace Mono.Xml.Xsl.Operations {
internal class XslChoose : XslCompiledElement {
XslOperation defaultChoice = null;
ArrayList conditions = new ArrayList ();
public XslChoose (Compiler c) : base (c) {}
protected override void Compile (Compiler c)
{
if (c.Debugger != null)
c.Debugger.DebugCompile (c.Input);
c.CheckExtraAttributes ("choose");
if (!c.Input.MoveToFirstChild ())
throw new XsltCompileException ("Expecting non-empty element", null, c.Input);
do {
if (c.Input.NodeType != XPathNodeType.Element) continue;
if (c.Input.NamespaceURI != XsltNamespace) continue;
if (defaultChoice != null)
throw new XsltCompileException ("otherwise attribute must be last", null, c.Input);
switch (c.Input.LocalName) {
case "when":
conditions.Add (new XslIf (c));
break;
case "otherwise":
c.CheckExtraAttributes ("otherwise");
if (c.Input.MoveToFirstChild ()) {
defaultChoice = c.CompileTemplateContent ();
c.Input.MoveToParent ();
}
break;
default:
if (c.CurrentStylesheet.Version == "1.0")
throw new XsltCompileException ("XSLT choose element accepts only when and otherwise elements", null, c.Input);
break;
}
} while (c.Input.MoveToNext ());
c.Input.MoveToParent ();
if (conditions.Count == 0)
throw new XsltCompileException ("Choose must have 1 or more when elements", null, c.Input);
}
public override void Evaluate (XslTransformProcessor p)
{
if (p.Debugger != null)
p.Debugger.DebugExecute (p, this.DebugInput);
int len = conditions.Count;
for (int i = 0; i < len; i++) {
if (((XslIf)conditions [i]).EvaluateIfTrue (p))
return;
}
if (defaultChoice != null)
defaultChoice.Evaluate (p);
}
}
}
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