// 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.
//
// Copyright (c) 2008 Novell, Inc. (http://www.novell.com)
//
using System;
using System.ComponentModel;
using System.Reflection;
namespace System.Windows.Markup{
[MarkupExtensionReturnType (typeof(object))]
#if notyet
[TypeConverter (typeof(StaticExtensionConverter))]
#endif
public class StaticExtension : MarkupExtension
{
public StaticExtension ()
{
}
public StaticExtension (string member)
{
if (member == null)
throw new ArgumentNullException ();
this.member = member;
}
[ConstructorArgument ("member")]
public string Member {
get { return member; }
set {
if (value == null)
throw new ArgumentNullException ();
member = value;
}
}
public override object ProvideValue (IServiceProvider serviceProvider)
{
if (serviceProvider == null)
throw new ArgumentNullException ();
if (member == null)
throw new ArgumentNullException ();
IXamlTypeResolver resolver = serviceProvider.GetService (typeof (IXamlTypeResolver)) as IXamlTypeResolver;
if (resolver == null)
throw new ArgumentException ("Markup extension 'StaticExtension' requires 'IXamlTypeResolver' be implemented in the IServiceProvider for ProvideValue");
int dot = member.LastIndexOf ('.');
string typeName = member.Substring (0, dot);
string memberName = member.Substring (dot + 1);
Type type = resolver.Resolve (typeName);
// we don't check type here for nullness, as WPF raises a NRE
PropertyInfo pi = type.GetProperty (memberName, BindingFlags.Public | BindingFlags.Static);
if (pi != null)
return pi.GetValue (null, null);
FieldInfo fi = type.GetField (memberName, BindingFlags.Public | BindingFlags.Static);
if (fi != null)
return fi.GetValue (null);
throw new ArgumentException (string.Format ("'{0}' StaticExtension value cannot be resolved to an enumeration, static field, or static property", member));
}
string member;
}
}
|